JP2018178972A - Valve timing adjustment device - Google Patents

Abstract

A valve timing adjusting device having a small hydraulic oil control unit is provided. A retard supply oil passage RRs connects a hydraulic oil supply source OS and a retard chamber 201 via a hydraulic oil control unit OC. The advance supply oil passage RAs connects the hydraulic oil supply source OS and the advance chamber 202 via the hydraulic oil control unit OC. The retarded angle drain oil passage RRd and the advanced angle drain oil passage RAd connect the retarded angle chamber 201 and the advanced angle chamber 202 to the oil discharge portion OD. The recycling oil passage Rre connects the retard drain oil passage RRd, the advance drain oil passage RAd, the retard supply oil passage RRs, and the advance supply oil passage RAs. The recycle check valve 81 allows hydraulic oil to flow only from the drain oil passage side to the retard supply oil passage RRs side and the advance supply oil passage RAs side in the recycle oil passage Rre. The recycling oil passage Rre is connected to the drain oil passage inside the hydraulic oil control unit OC. [Selection drawing] Fig. 8

Description

  The present invention relates to a valve timing adjustment device.

  A valve timing adjustment device is known which is provided in a power transmission path for transmitting power from a drive shaft of an internal combustion engine to a driven shaft, and which adjusts the valve timing of a valve which is opened and closed by the driven shaft. In the case of a hydraulic type, the valve timing adjustment device includes a housing that rotates in conjunction with one of the drive shaft and the driven shaft, and a vane rotor fixed to the other end of the drive shaft and the driven shaft. The vane rotor is rotated relative to the housing in the retarding direction or the advancing direction by supplying the hydraulic oil to one of the retardation chamber and the advancing chamber defined by the vane rotor. The hydraulic oil supplied to the retarding angle chamber and the advancing angle chamber is controlled by a hydraulic oil control valve.

Patent No. 5941602

For example, in the valve timing adjusting device of Patent Document 1, a supply opening through which hydraulic oil supplied from a hydraulic oil supply source flows to a sleeve constituting a hydraulic oil control valve, and a retarding opening communicating with a retarding chamber. , An advancing opening communicating with the advancing chamber, a retarding drain opening through which the hydraulic oil discharged from the retarding chamber flows to the outside, an advancing drain opening through which the hydraulic oil discharged from the advancing chamber to the outside flows A retarding recycling opening through which hydraulic fluid flows from the retarding chamber back to the hydraulic fluid control valve, and an advancing recycle opening through which hydraulic fluid flows from the advancing chamber back to the hydraulic fluid control valve are formed. The two recycling openings allow the reuse of hydraulic fluid from the retarding and advancing chambers.
In the valve timing adjusting device of Patent Document 1, two recycle oil passages passing through the recycle opening operate on the retarding supply oil passage passing through the retarding opening and the advancing supply oil passage passing through the advancing opening, respectively. It is connected outside the oil control valve. Also, the two drain openings are formed independently of the two recycling openings, the retarding opening and the advancing opening. Therefore, it is necessary to form a large number of openings in the hydraulic oil control valve as described above. Therefore, the physique of the hydraulic oil control valve may increase in the direction in which the openings are arranged.

  An object of the present invention is to provide a valve timing adjustment device provided with a small hydraulic fluid control unit.

The present invention is a valve timing adjustment device (10) for adjusting the valve timing of valves (4, 5) of an internal combustion engine (1), comprising: Control part (OC), oil discharge part (OD), retarded oil supply path (RRs), advance oil supply path (RAs), drain oil path (RRd, RAd), recycle oil path (Rre) and recycle check valve And (81).
The phase converter has a retardation chamber (201) and an advancement chamber (202).
The hydraulic oil source supplies hydraulic oil to the retardation chamber and the advancing chamber.
The hydraulic oil control unit controls hydraulic oil supplied from the hydraulic oil supply source to the retarding chamber and the advancing chamber.
The oil discharger discharges the hydraulic oil from the retardation chamber or the advance chamber.

The retardation supply oil passage connects the hydraulic oil supply source and the retardation chamber via the hydraulic oil control unit.
The advance angle supply oil path connects the hydraulic oil supply source and the advance angle chamber via the hydraulic oil control unit.
The drain oil passage connects the retarding chamber and the advancing chamber to the oil discharger.
The recycled oil passage connects the drain oil passage with the retarded supply oil passage and the advanced supply oil passage. Thus, it is possible to reuse the hydraulic oil from the retardation chamber and the advancing chamber.

The recycle check valve only allows the flow of hydraulic oil from the drain oil side to the retarded supply side and the advance side in the recycled oil path. Thereby, it is possible to suppress the flow of the hydraulic oil from each supply oil passage side to the drain oil passage side, that is, the reverse flow. Therefore, the responsiveness of the valve timing adjustment device can be improved.
In the present invention, the recycle oil passage is connected to the drain oil passage inside the hydraulic oil control unit. Therefore, by forming the recycled oil passage inside the hydraulic oil control unit, the opening for the recycled oil passage can be reduced, and in the hydraulic oil control unit, the drain oil passage is formed at the retarded opening and the advanced opening. By doing this, the opening for the drain oil passage can be reduced. Thereby, the opening for each oil passage formed in the outer wall of the hydraulic oil control unit can be reduced. Therefore, the physique of the hydraulic fluid control unit can be reduced in the direction in which the openings are arranged.

BRIEF DESCRIPTION OF THE DRAWINGS Sectional drawing which shows the valve timing adjustment apparatus by 1st Embodiment. II-II sectional view taken on the line of FIG. Sectional drawing which shows the hydraulic fluid control valve of the valve timing control apparatus by 1st Embodiment. IV-IV sectional view taken on the line of FIG. The perspective view which shows the inner sleeve of the valve timing adjustment apparatus by 1st Embodiment. FIG. 5 is a perspective view showing a retard supply check valve of the valve timing adjustment device according to the first embodiment. FIG. 6 is a cross-sectional view showing the hydraulic fluid control valve of the valve timing adjustment device according to the first embodiment, when the spool is at one end of a stroke section. FIG. 5 is a schematic view showing the valve timing adjustment device according to the first embodiment, when the spool is at one end of a stroke section. FIG. 8 is a cross-sectional view showing the hydraulic fluid control valve of the valve timing adjustment device according to the first embodiment, when the spool is at an intermediate position of the stroke section. It is a schematic diagram which shows the valve timing control apparatus by 1st Embodiment, Comprising: A figure when a spool is in the middle position of a stroke area. FIG. 8 is a cross-sectional view showing the hydraulic fluid control valve of the valve timing adjustment device according to the first embodiment, when the spool is at the other end of the stroke section. FIG. 5 is a schematic view showing the valve timing adjustment device according to the first embodiment, when the spool is at the other end of the stroke section. Sectional drawing which shows the valve timing adjustment apparatus by 2nd Embodiment. The top view which shows the reed valve of the valve timing control apparatus by 2nd Embodiment. The expanded view which shows the retardation supply check valve of the valve timing control apparatus by 3rd Embodiment. Sectional drawing which shows the retardation supply check valve of the valve timing control apparatus by 3rd Embodiment. The expanded view which shows the retardation supply check valve of the valve timing control apparatus by 4th Embodiment.

  Hereinafter, valve timing adjustment devices according to a plurality of embodiments of the present invention will be described based on the drawings. In addition, the same code | symbol is attached | subjected to a substantially the same structure site | part in several embodiment, and description is abbreviate | omitted. In addition, substantially the same components in the plurality of embodiments exhibit the same or similar effects.

First Embodiment
A valve timing control apparatus according to a first embodiment is shown in FIGS. The valve timing adjustment device 10 changes the rotational phase of the camshaft 3 with respect to the crankshaft 2 of the engine 1 as an internal combustion engine, so that the intake valve 4 or the exhaust valve 5 can be It adjusts the valve timing. The valve timing adjustment device 10 is provided in a power transmission path from the crankshaft 2 to the camshaft 3. The crankshaft 2 corresponds to the "drive shaft". The cam shaft 3 corresponds to a "follower shaft". The intake valve 4 and the exhaust valve 5 correspond to "valves".

The configuration of the valve timing adjustment device 10 will be described based on FIGS.
The valve timing adjustment device 10 includes a phase conversion unit PC, a hydraulic oil supply source OS, a hydraulic oil control unit OC, an oil discharge unit OD, a retardation supply oil passage RRs, an advance supply oil passage RAs, and a retardation as a drain oil passage. A drain oil passage RRd, an advance drain oil passage RAd, a recycle oil passage Rre, a retarded supply check valve 71, an advance supply check valve 72, a recycle check valve 81 and the like are provided.

The phase converter PC includes a housing 20 and a vane rotor 30.
The housing 20 has a gear portion 21 and a case 22. The case 22 has a cylindrical portion 221 and plate portions 222 and 223. The cylindrical portion 221 is formed in a cylindrical shape. The plate portion 222 is integrally formed with the cylindrical portion 221 so as to close one end of the cylindrical portion 221. The plate portion 223 is provided to close the other end of the cylindrical portion 221. Thus, a space 200 is formed inside the housing 20. The plate portion 223 is fixed to the cylindrical portion 221 by the bolt 12. The gear portion 21 is formed at the outer edge of the plate portion 223.

The plate portion 223 is fitted to the end of the cam shaft 3. The cam shaft 3 rotatably supports the housing 20. The chain 6 is wound around the gear portion 21 and the crankshaft 2. The gear portion 21 rotates in conjunction with the crankshaft 2.
The case 22 forms a plurality of partition walls 23 projecting radially inward from the cylindrical portion 221. An opening 24 is formed at the center of the plate portion 222 of the case 22 so as to open to the space outside the case 22. The opening 24 is located on the opposite side of the vane rotor 30 to the cam shaft 3.

  The vane rotor 30 has a boss 31 and a plurality of vanes 32. The boss 31 is cylindrical and fixed to the end of the cam shaft 3. The vanes 32 protrude from the bosses 31 radially outward between the partition portions 23. A space 200 inside the housing 20 is partitioned by a vane 32 into a retarding chamber 201 and an advancing chamber 202. That is, the housing 20 forms a retardation chamber 201 and an advancement chamber 202 with the vane rotor 30. The retardation chamber 201 is located in one of the circumferential directions with respect to the vane 32. The advance angle chamber 202 is located on the other side of the vane 32 in the circumferential direction. The vane rotor 30 rotates relative to the housing 20 in the retarding direction or the advancing direction according to the oil pressure of the retarding chamber 201 and the advancing chamber 202.

  In the present embodiment, the hydraulic oil control unit OC is the hydraulic oil control valve 11. The hydraulic oil control valve 11 includes a sleeve 400, a spool 60, and the like.

In the present embodiment, the hydraulic oil control valve 11 is provided at the central portion of the housing 20 and the vane rotor 30 (see FIGS. 1 and 2). That is, the hydraulic oil control valve 11 is provided so as to be at least partially located inside the housing 20.
The sleeve 400 has an outer sleeve 40 and an inner sleeve 50.
The outer sleeve 40 is formed in a substantially cylindrical shape, for example, of a relatively hard material including iron. The outer sleeve 40 has an inner peripheral wall formed in a substantially cylindrical surface shape.
As shown in FIG. 3, a threaded portion 41 is formed on the outer peripheral wall of one end of the outer sleeve 40. On the other end side of the outer sleeve 40, a locking portion 49 is formed which annularly extends radially outward from the outer peripheral wall.

  A shaft hole 100 and a supply hole 101 are formed at an end of the camshaft 3 on the valve timing adjusting device 10 side. The shaft hole portion 100 is formed to extend in the axial direction of the cam shaft 3 from the center of the end face of the cam shaft 3 on the valve timing adjusting device 10 side. The supply hole portion 101 is formed so as to extend radially inward from the outer wall of the cam shaft 3 and communicate with the shaft hole portion 100.

On the inner wall of the shaft hole portion 100 of the cam shaft 3, an axial side screw portion 110 which can be screwed to the screw portion 41 of the outer sleeve 40 is formed.
The outer sleeve 40 passes through the inside of the boss 31 of the vane rotor 30 and is fixed to the cam shaft 3 such that the screw portion 41 is coupled to the shaft side screw portion 110 of the cam shaft 3. At this time, the locking portion 49 locks the end surface of the boss 31 of the vane rotor 30 opposite to the cam shaft 3. Thus, the vane rotor 30 is fixed to the cam shaft 3 so as to be sandwiched between the cam shaft 3 and the locking portion 49. Thus, the outer sleeve 40 is provided at the central portion of the vane rotor 30.

  In the present embodiment, the hydraulic oil supply source OS is an oil pump 8. The oil discharger OD is an oil pan 7. The oil pump 8 is connected to the supply hole 101. The oil pump 8 pumps up the hydraulic oil stored in the oil pan 7 and supplies it to the supply hole portion 101. As a result, hydraulic oil flows into the shaft hole portion 100.

  The inner sleeve 50 is formed in a substantially cylindrical shape, for example, of a material having a relatively low hardness including aluminum. That is, the inner sleeve 50 is formed of a material whose hardness is lower than that of the outer sleeve 40. The inner sleeve 50 has an inner circumferential wall and an outer circumferential wall formed in a substantially cylindrical shape. The inner sleeve 50 is surface-hardened such as alumite on the surface, and has a surface layer of high hardness compared to the base material on the surface.

  As shown in FIG. 3, the inner sleeve 50 is provided on the inside of the outer sleeve 40 so that the outer peripheral wall is fitted to the inner peripheral wall of the outer sleeve 40. The inner sleeve 50 can not move relative to the outer sleeve 40.

  A sleeve sealing portion 51 is provided at one end of the inner sleeve 50. The sleeve sealing portion 51 closes one end of the inner sleeve 50.

The spool 60 is formed in, for example, a substantially cylindrical shape of metal.
The spool 60 is provided on the inner side of the inner sleeve 50 so that the outer peripheral wall slides with the inner peripheral wall of the inner sleeve 50 and can reciprocate in the axial direction.

  A spool seal 62 is provided at one end of the spool 60. The spool sealing portion 62 closes one end of the spool 60.

  A variable volume space Sv is formed between the sleeve sealing portion 51 and the other end of the spool 60 inside the inner sleeve 50. The variable volume space Sv changes in volume when the spool 60 moves in the axial direction with respect to the inner sleeve 50. That is, the sleeve sealing portion 51 forms, with the spool 60, a volume variable space Sv in which the volume changes.

  A spring 63 is provided in the variable volume space Sv. The spring 63 is a so-called coil spring, and one end thereof is in contact with the sleeve sealing portion 51, and the other end is in contact with the other end of the spool 60. The spring 63 biases the spool 60 to the side opposite to the sleeve seal portion 51.

  A locking portion 59 is provided radially inward of the other end of the outer sleeve 40. The locking portion 59 is formed in a cylindrical shape with a bottom, and the outer peripheral wall is provided to be fitted to the inner peripheral wall of the outer sleeve 40. A hole is formed at the center of the bottom of the locking portion 59, and the spool seal 62 is located inside the hole.

The locking portion 59 can lock one end of the spool 60 by the bottom portion. The locking portion 59 can regulate the movement of the spool 60 to the opposite side of the sleeve sealing portion 51 of the spool 60. As a result, the spool 60 is prevented from falling off from the inner side of the inner sleeve 50.
The spool 60 is axially movable from a position in contact with the locking portion 59 to a position in contact with the sleeve sealing portion 51. That is, the movable range with respect to the sleeve 400 is from the position abutting on the locking portion 59 (see FIGS. 3 and 7) to the position abutting on the sleeve sealing portion 51 (see FIG. 11). Hereinafter, the movable range of the spool 60 will be referred to as a "stroke section".

As shown in FIG. 3, the end of the inner sleeve 50 on the sleeve sealing portion 51 side is formed to have an outer diameter smaller than the inner diameter of the outer sleeve 40. Thus, a cylindrical space St1, which is a substantially cylindrical space, is formed between the outer peripheral wall of the end on the sleeve sealing portion 51 side of the inner sleeve 50 and the inner peripheral wall of the outer sleeve 40.
Further, in the inner sleeve 50, an annular recess Ht is formed. The annular recess Ht is formed so as to be recessed radially inward from a position corresponding to the locking portion 49 of the outer peripheral wall of the inner sleeve 50. Thus, an annular space St2, which is an annular space, is formed between the annular recess Ht and the inner peripheral wall of the outer sleeve 40.
Further, in the inner sleeve 50, a flow passage groove 52 is formed. The flow passage groove 52 is formed so as to be recessed radially inward from the outer peripheral wall of the inner sleeve 50 and to extend in the axial direction of the inner sleeve 50 (see FIGS. 3 and 5). The flow passage groove 52 forms an axial supply oil passage RsA. That is, the axial supply oil passage RsA is formed to extend in the axial direction of the sleeve 400 at the interface T1 between the outer sleeve 40 and the inner sleeve 50. One end of the axial supply oil passage RsA is connected to the cylindrical space St1, and the other end is connected to the annular space St2.

  Further, restriction grooves 511 and 512 are formed in the inner sleeve 50. The restriction groove portion 511 is formed so as to be recessed radially outward from a position corresponding to the end of the cylindrical space St1 of the inner peripheral wall of the inner sleeve 50. The restricting groove portion 512 is formed so as to be annularly recessed radially outward from a position corresponding to the annular recess Ht of the inner peripheral wall of the inner sleeve 50.

  In addition, a movement restricting portion 513 is formed on the inner sleeve 50. The movement restricting portion 513 is formed so as to be recessed radially inward from the outer peripheral wall of the inner sleeve 50 between the restricting groove portion 511 and the restricting groove portion 512. Therefore, a part of the movement restricting portion 513 in the circumferential direction is connected to the flow passage groove portion 52.

The sleeve 400 has a retarding supply opening ORs, an advancing supply opening OAs, a retarding opening OR, an advancing opening OA, and a recycling opening Ore.
The retardation supply opening ORs is formed to extend in the radial direction of the sleeve 400 and connect the restriction groove 511 of the inner sleeve 50 with the cylindrical space St1 and the axial supply oil passage RsA. A plurality of retardation supply openings ORs are formed in the circumferential direction of the inner sleeve 50.
The advance angle supply opening OAs is formed to extend in the radial direction of the sleeve 400 and connect the restriction groove 512 of the inner sleeve 50 with the annular space St2 and the axial supply oil passage RsA. A plurality of advance angle supply openings OAs are formed in the circumferential direction of the inner sleeve 50.

The retardation opening OR is formed to extend in the radial direction of the sleeve 400 and connect the space inside the inner sleeve 50 and the space outside the outer sleeve 40. A plurality of retarded openings OR are formed in the circumferential direction of the sleeve 400. The retardation opening portion OR communicates with the retardation chamber 201 via the retardation oil passage 301.
The advance opening OA is formed to extend in the radial direction of the sleeve 400 and connect the space inside the inner sleeve 50 and the space outside the outer sleeve 40. The advance opening OA is formed on the side of the locking portion 49 with respect to the retard opening OR. A plurality of advance angle openings OA are formed in the circumferential direction of the sleeve 400. The advance opening OA is in communication with the advance chamber 202 via the advance oil passage 302.

  The recycle opening Ore is formed to extend in the radial direction of the sleeve 400 and connect the space inside the inner sleeve 50 to the movement restricting portion 513 and the axial supply oil passage RsA. Four recycling openings Ore are formed in the circumferential direction of the inner sleeve 50 (see FIG. 4).

The spool 60 has a retard supply recess HRs, a retard drain recess HRd, an advance drain recess HAd, an advance supply recess HAs, and drain openings Od1 and Od2.
The retard supply recess HRs, the retard drain recess HRd, the advance drain recess HAd, and the advance supply recess HAs are respectively formed in a ring shape so as to be recessed radially inward from the outer peripheral wall of the spool 60. The retardation supply recess HRs, the retardation drain recess HRd, the advance drain recess HAd, and the advance supply recess HAs are formed in this order in the axial direction of the spool 60. In addition, the retarded drain recess HRd and the advanced drain recess HAd are integrally formed. The retarded drain recess HRd and the advanced drain recess HAd form a specific space Ss with the inner peripheral wall of the inner sleeve 50. That is, the spool 60 forms a specific space Ss with the sleeve 400.

  The drain opening Od1 is formed to communicate the space inside the spool 60 with the retarded drain recess HRd and the advanced drain recess HAd, that is, the specific space Ss. The drain opening Od2 is formed at the end of the spool 60 on the spool sealing portion 62 side so as to communicate the inner space with the outer space. Two drain openings Od1 are formed at equal intervals in the circumferential direction of the spool 60 (see FIG. 4). For example, four drain openings Od2 are formed in the circumferential direction of the spool 60 at equal intervals.

  The retardation supply oil passage RRs connects the oil pump 8 and the retardation chamber 201 via the hydraulic oil control valve 11. The advance angle supply oil passage RAs connects the oil pump 8 and the advance angle chamber 202 via the hydraulic oil control valve 11. The retarded drain oil passage RRd as a drain oil passage connects the retarded angle chamber 201 and the oil pan 7. The advance angle drain oil passage RAd as a drain oil passage connects the advance angle chamber 202 and the oil pan 7.

The retardation supply oil passage RRs includes the supply hole portion 101, the shaft hole portion 100, the cylindrical space St1, the axial supply oil passage RsA, the retardation supply opening ORs, the restriction groove 511, the retardation supply recess HRs, and the retardation opening. The oil pump 8 and the retardation chamber 201 are connected via the portion OR and the retardation oil passage 301.
The advance supply oil passage RAs includes a supply hole portion 101, a shaft hole portion 100, a cylindrical space St1, an axial supply oil passage RsA, an advance supply opening OAs, a restriction groove 512, an advance supply recess HAs, and an advance opening. The oil pump 8 and the advancing chamber 202 are connected via the part OA and the advancing oil passage 302.
The retardation drain oil passage RRd connects the retardation chamber 201 and the oil pan 7 via the retardation oil passage 301, the retardation opening OR, the retardation drain recess HRd, and the drain openings Od1 and Od2. There is.
The advance drain oil passage RAd connects the advance chamber 202 and the oil pan 7 via the advance oil passage 302, the advance opening OA, the advance drain recess HAd, and the drain openings Od1 and Od2. There is.
As described above, the retarding oil supply passage RRs, the advancing oil supply passage RAs, the retarding drain oil passage RRd, and the advancing drain oil passage RAd are partially formed inside the hydraulic oil control valve 11.
The axial supply oil passage RsA is formed to extend in the axial direction of the sleeve 400 in the advance angle supply oil passage RAs. That is, the sleeve 400 has an axial supply oil passage RsA extending in the axial direction of the sleeve 400 in the advance angle supply oil passage RAs.

The recycled oil passage Rre connects the delayed drain oil passage RRd and the advanced drain oil passage RAd as a drain oil passage, and the delayed supply oil passage RRs and the advanced supply oil passage RAs.
As shown in FIGS. 3 and 4, the recycle oil passage Rre passes from the specific space Ss to the retard opening oil passage RRs and the advance angle supply oil passage RAs via the recycle opening Ore and the movement restricting portion 513, that is, the axial direction It is connected to the supply oil passage RsA.
The retarded oil passage RRd and the advanced drain oil passage RAd as the drain oil passage are the retarded oil passage 301, the retarded opening OR, the advancing oil passage 302, the advanced opening OA, the specific space Ss, and the drain opening. It is connected to the space inside the spool 60 via the part Od1.
As shown in FIG. 4, the drain opening portion Od1 is formed to be connected to the specific space Ss in the drain oil passage and to extend in the radial direction of the sleeve 400 or the spool 60 from the specific space Ss. The recycle opening Ore is connected to the specific space Ss in the recycle oil passage Rre, and is formed to extend from the specific space Ss to the opposite side to the drain opening Od1. The recycled oil passage Rre is connected to the retarded drain oil passage RRd and the advanced drain oil passage RAd in the specific space Ss.

As shown in FIGS. 3 and 4, the drain opening Od1 is formed such that at least a part thereof overlaps with the recycling opening Ore in the axial direction of the sleeve 400 or the spool 60.
Further, the drain opening portion Od1 is formed in the spool 60 so as to extend inward in the radial direction of the sleeve 400 or the spool 60 from the specific space Ss.
Further, the recycling opening Ore is formed in the inner sleeve 50 so as to extend from the specific space Ss to the radial outside of the sleeve 400 or the spool 60.

When the spool 60 is in contact with the locking portion 59 (see FIGS. 3, 7 and 8), that is, when the spool 60 is positioned at one end of the stroke section, the spool 60 opens the retarding opening OR Therefore, the oil pump 8 includes the supply hole portion 101 of the retardation supply oil passage RRs, the shaft hole 100, the cylindrical space St1, the axial supply oil passage RsA, the retardation supply opening ORs, the restriction groove 511, and the It communicates with the retardation chamber 201 via the corner supply recess HRs, the retardation opening OR, and the retardation oil passage 301. As a result, the hydraulic oil can be supplied from the oil pump 8 to the retardation chamber 201 via the retardation supply oil passage RRs.
At this time, the advance chamber 202 is moved to the oil pan 7 via the advance oil passage 302 of the advance drain oil passage RAd, the advance opening OA, the advance drain recess HAd, and the drain openings Od1 and Od2. It communicates. Thus, the hydraulic oil can be discharged from the advancing chamber 202 to the oil pan 7 via the advancing drain oil passage RAd.

  When the spool 60 is positioned between the locking portion 59 and the sleeve sealing portion 51 (see FIGS. 9 and 10), that is, when the spool 60 is positioned in the middle of the stroke section, the oil pump 8 advances Supply hole portion 101 of the angle supply oil passage RAs, shaft hole portion 100, cylindrical space St1, axial direction supply oil passage RsA, advance angle supply opening portion OAs, restricting groove portion 512, advance angle supply concave portion HAs, advance angle opening portion OA It communicates with the advancing chamber 202 via the advancing oil passage 302. At this time, the oil pump 8 and the retardation chamber 201 communicate with each other through the retardation supply oil passage RRs. As a result, hydraulic oil can be supplied from the oil pump 8 to the retarding chamber 201 and the advancing chamber 202 via the retarding supply oil passage RRs and the advancing supply oil passage RAs. However, since the retarded drain oil passage RRd and the advanced drain oil passage RAd are closed by the spool 60, that is, they are shut off, the hydraulic fluid is transferred from the retarding chamber 201 and the advancing chamber 202 to the oil pan 7 Not discharged.

  When the spool 60 is in contact with the sleeve sealing portion 51 (see FIGS. 11 and 12), that is, when the spool 60 is positioned at the other end of the stroke section, the retarding chamber 201 forms a retarding drain oil passage. It communicates with the oil pan 7 via the retarded oil passage 301 of RRd, the retarded opening OR, the retarded drain recess HRd, and the drain openings Od1 and Od2. At this time, the oil pump 8 and the advancing chamber 202 are in communication with each other by the advancing oil supply passage RAs. Thus, the hydraulic oil can be discharged from the retardation chamber 201 to the oil pan 7 via the retardation drain oil passage RRd, and the advance chamber 202 from the oil pump 8 via the advance supply oil passage RAs. Can be supplied with hydraulic fluid.

  A filter 58 is provided inside the end of the outer sleeve 40 on the sleeve sealing portion 51 side, that is, in the middle of the retarded supply oil passage RRs and the advance supply oil passage RAs. The filter 58 is, for example, a disk-like mesh. The filter 58 can collect foreign matter contained in the hydraulic oil. Therefore, the foreign matter can be suppressed from flowing to the downstream side of the filter 58, that is, the opposite side to the oil pump 8.

The retarded supply check valve 71 is formed in, for example, a substantially cylindrical shape by bending a rectangular thin metal plate along the circumferential direction in the longitudinal direction. FIG. 5 is a perspective view of the retardation supply check valve 71. As shown in FIG.
The retarded supply check valve 71 has an overlapping portion 700.
The overlapping portion 700 is formed at one end of the retardation supply check valve 71 in the circumferential direction. The overlapping portion 700 is formed so as to overlap the radially outer side of the other end portion in the circumferential direction of the retardation supply check valve 71 (see FIG. 5).

  The retardation supply check valve 71 is provided in the restriction groove 511. The retardation supply check valve 71 is provided in the restriction groove 511 so as to be elastically deformable in the radial direction. The retardation supply check valve 71 is provided radially inward of the inner sleeve 50 with respect to the retardation supply opening ORs. The retardation supply check valve 71 is provided in the restriction groove portion 511, and in a state where no hydraulic oil flows in the retardation supply oil passage RRs, that is, in a state where no external force is applied, the overlapping portion 700 is the other in the circumferential direction. It is in the state of overlapping the end.

  When the hydraulic oil flows from the retardation supply opening ORs side to the retardation supply recess HRs in the retardation supply oil passage RRs, the outer peripheral wall of the retardation supply check valve 71 is pushed by the hydraulic oil and contracted radially inward. That is, it deforms as the inner diameter shrinks. As a result, the outer peripheral wall of the retardation supply check valve 71 is separated from the retardation supply opening ORs, and the hydraulic oil can flow to the retardation supply recess HRs through the retardation supply check valve 71. At this time, the overlapping portion 700 is in a state of maintaining a partially overlapped state while enlarging the length of the overlapping range of the overlapping portion 700 and the other end of the retardation supply check valve 71.

  When the flow rate of the hydraulic oil flowing through the retarded supply oil passage RRs becomes equal to or less than a predetermined value, the retarded supply check valve 71 is deformed so as to expand radially outward, that is, expand the inner diameter. Furthermore, when the hydraulic oil flows from the retardation supply recess HRs side to the retardation supply opening ORs side, the inner peripheral wall of the retardation supply check valve 71 is pushed radially outward by the hydraulic oil to the retardation supply opening ORs. Abut. As a result, the flow of hydraulic fluid from the retardation supply recess HRs side to the retardation supply opening ORs side is restricted.

  Thus, the retardation supply check valve 71 functions as a check valve, and allows the flow of hydraulic fluid from the retardation supply opening ORs side to the retardation supply recess HRs side, and from the retardation supply recess HRs side It is possible to regulate the flow of hydraulic fluid to the retarded supply opening ORs side. That is, the retardation supply check valve 71 is provided on the oil pump 8 side with respect to the spool 60 of the hydraulic oil control valve 11 in the retardation supply oil passage RRs, and the hydraulic oil from the oil pump 8 to the retardation chamber 201 Allow only flow.

  The advance supply check valve 72 is formed in a substantially cylindrical shape by bending, for example, a rectangular metal thin plate along the circumferential direction in the same manner as the retard supply check valve 71. The configuration of the advance angle supply check valve 72 is the same as that of the retard angle supply check valve 71, so the detailed description thereof will be omitted.

  The advance supply check valve 72 is provided in the restriction groove 512. The advance angle supply check valve 72 is provided in the restriction groove 512 so as to be elastically deformable in the radial direction. The advance supply check valve 72 is provided radially inward of the inner sleeve 50 with respect to the advance supply opening OAs. The advance supply check valve 72 is provided in the restriction groove 512, and in a state where hydraulic oil is not flowing in the advance supply oil passage RAs, that is, in a state where no external force is applied, the overlapping portion 700 is the other circumferential direction. It is in the state of overlapping the end.

  When the hydraulic oil flows from the side of the advance supply opening OAs to the side of the advance supply recess HAs in the advance supply oil passage RAs, the outer peripheral wall of the advance supply check valve 72 is pushed by the hydraulic oil and contracted radially inward. That is, it deforms as the inner diameter shrinks. Thereby, the outer peripheral wall of the advance supply check valve 72 is separated from the advance supply opening OAs, and the hydraulic oil can flow to the advance supply recess HAs through the advance supply check valve 72. At this time, the overlapping portion 700 is in a state of maintaining a partially overlapped state while enlarging the length of the overlapping range of the overlapping portion 700 and the other end of the advance angle supply check valve 72.

  When the flow rate of the hydraulic oil flowing through the advance angle supply oil passage RAs becomes equal to or less than a predetermined value, the advance angle supply check valve 72 is deformed so as to expand radially outward, that is, expand the inner diameter. Furthermore, when the hydraulic oil flows from the side of the advance supply recess HAs to the side of the advance supply opening OAs, the inner circumferential wall of the advance supply check valve 72 is pushed radially outward by the hydraulic oil, and the advance supply opening OAs is Abut. As a result, the flow of hydraulic fluid from the advance supply recess HAs side to the advance supply opening OAs side is restricted.

  Thus, the advance supply check valve 72 functions as a check valve, allowing the flow of hydraulic fluid from the advance supply opening OAs side to the advance supply recess HAs side, and from the advance supply recess HAs side It is possible to regulate the flow of hydraulic oil to the advance supply opening OAs side. That is, the advance supply check valve 72 is provided on the oil pump 8 side with respect to the spool 60 of the hydraulic oil control valve 11 in the advance supply oil passage RAs, and the hydraulic oil from the oil pump 8 to the advance chamber 202 Allow only flow.

The restricting groove portions 511 and 512 can restrict axial movement of the retardation supply check valve 71 and the advance supply check valve 72, respectively.
As shown in FIG. 4, five advance supply openings OAs are formed in the inner sleeve 50. The advance supply openings OAs are formed in approximately half of the entire circumferential range of the inner sleeve 50. That is, the advance supply openings OAs are formed offset to a specific portion in the circumferential direction of the inner sleeve 50. Therefore, when the hydraulic oil flows from the advance supply opening OAs to the advance supply recess HAs, the advance supply check valve 72 is opposite to the advance supply opening OAs of the restriction groove 512 by the hydraulic oil. It is pressed. Thus, the advance supply check valve 72 can be prevented from dropping out of the restriction groove 512. Therefore, the restricting groove portion 512 can maintain the function of restricting the movement of the advance supply check valve 72 in the axial direction.

  Similarly to the advance supply openings OAs, five retard supply openings ORs are formed in the inner sleeve 50. The retardation supply openings ORs are formed in approximately half of the entire range in the circumferential direction of the inner sleeve 50. That is, the retardation supply opening ORs is formed to be biased to a specific portion in the circumferential direction of the inner sleeve 50. Therefore, when the hydraulic oil flows from the retardation supply opening ORs side to the retardation supply recess HRs, the retardation supply check valve 71 is in the opposite side of the retardation supply opening ORs of the restriction groove 511 by the hydraulic oil. It is pressed. As a result, it is possible to suppress the retardation supply check valve 71 from falling out of the restriction groove portion 511. Therefore, the restricting groove portion 511 can maintain the function of restricting the axial movement of the retardation supply check valve 71.

  The recycle check valve 81 is formed in a substantially cylindrical shape by bending, for example, a rectangular metal thin plate along the circumferential direction in the same manner as the retardation supply check valve 71. The outer diameter of the recycle check valve 81 is larger than the outer diameter of the retarded supply check valve 71. The configuration of the recycle check valve 81 is the same as that of the retarded angle supply check valve 71 except for the difference in outer diameter, and thus the detailed configuration will not be described.

  The recycle check valve 81 is provided on the movement restricting portion 513, that is, on the recycle oil passage Rre. The recycle check valve 81 is provided in the movement restriction portion 513 so as to be elastically deformable in the radial direction. The recycle check valve 81 is provided radially outside the inner sleeve 50 with respect to the recycle opening Ore. The recycle check valve 81 is provided in the movement restricting portion 513, and in a state where no hydraulic oil flows in the recycled oil passage Rre, that is, in a state where no external force is applied, the overlapping portion 700 is at the other end in the circumferential direction. It is in the overlapping state.

  When the hydraulic oil flows from the recycle opening Ore side to the axial supply oil path RsA side in the recycle oil path Rre, the recycle check valve 81 is such that the inner peripheral wall is pushed by the hydraulic oil and expands radially outward, that is, the inner diameter is It deforms as it expands. Thereby, the inner peripheral wall of the recycle check valve 81 is separated from the recycle opening Ore, and the hydraulic oil can flow to the axial supply oil passage RsA side via the recycle check valve 81. At this time, the overlapping portion 700 is in a state in which a partially overlapped state is maintained while reducing the length of the overlapping range of the overlapping portion 700 and the other end of the recycle check valve 81.

  When the flow rate of the hydraulic oil flowing through the recycle oil passage Rre becomes equal to or less than a predetermined value, the recycle check valve 81 is deformed so as to contract radially inward, that is, reduce the inner diameter. Furthermore, when the hydraulic oil flows from the axial supply oil passage RsA side to the recycle opening Ore side, the outer peripheral wall of the recycle check valve 81 is pushed radially inward by the hydraulic oil and abuts on the recycle opening Ore. As a result, the flow of hydraulic fluid from the axial supply oil passage RsA side to the recycle opening Ore side is restricted.

Thus, the recycle check valve 81 functions as a check valve, allowing the flow of hydraulic fluid from the recycle opening Ore side to the axial supply oil passage RsA side, and the recycle opening from the axial supply oil passage RsA side It is possible to regulate the flow of hydraulic oil to the part Ore side. That is, the recycle check valve 81 allows only the flow of hydraulic fluid from the drain oil side to the retarded supply side RRs and the advance side oil supply RAs in the recycled oil path Rre.
The movement restricting portion 513 can restrict movement of the recycle check valve 81 in the axial direction.

A linear solenoid 9 is provided on the opposite side of the spool 60 to the cam shaft 3. The linear solenoid 9 is provided in contact with the spool sealing portion 62. When energized, the linear solenoid 9 presses the spool 60 against the biasing force of the spring 63 via the spool sealing portion 62 toward the camshaft 3 side. As a result, the spool 60 changes its axial position relative to the sleeve 400 in the stroke section.
The variable volume space Sv communicates with the retarded drain oil passage RRd and the advanced angle drain oil passage RAd. Therefore, the variable volume space Sv is opened to the atmosphere via the retarded drain oil passage RRd and the drain opening Od2 of the advanced drain oil passage RAd. Thereby, the pressure of the volume variable space Sv can be made equal to the atmospheric pressure. Therefore, axial movement of the spool 60 can be made smooth.

  Next, the change of the flow of hydraulic fluid according to the position of the spool 60 with respect to the sleeve 400 will be described based on FIGS.

  As shown in FIGS. 7 and 8, when the spool 60 is in contact with the locking portion 59, that is, when the spool 60 is positioned at one end of the stroke section, the hydraulic oil is retarded from the oil pump 8 It is supplied to the retardation chamber 201 via the supply oil passage RRs. At this time, the hydraulic oil is discharged from the advancing chamber 202 to the oil pan 7 via the advancing drain oil passage RAd. Further, part of the hydraulic oil flowing through the advance drain oil passage RAd is returned to the axial supply oil passage RsA side and the retarded supply oil passage RRs side via the recycle oil passage Rre. Thus, the hydraulic oil discharged from the advance angle chamber 202 can be reused. At this time, backflow from the axial direction supply oil passage RsA side to the drain oil passage side in the recycle oil passage Rre is suppressed by the recycle check valve 81.

  As shown in FIGS. 9 and 10, when the spool 60 is positioned between the locking portion 59 and the sleeve sealing portion 51, that is, when the spool 60 is positioned in the middle of the stroke section, the hydraulic fluid is It is supplied from the oil pump 8 to the retardation chamber 201 via the retardation supply oil passage RRs. At this time, the hydraulic oil is supplied from the oil pump 8 to the advance chamber 202 via the advance supply oil passage RAs. At this time, since the retarded drain oil passage RRd and the advanced angle drain oil passage RAd are closed by the spool 60, no hydraulic oil flows in the drain oil passage, and the hydraulic oil passes through the recycled oil passage Rre. It is not returned to the direction supply oil passage RsA side.

  As shown in FIGS. 11 and 12, when the spool 60 is in contact with the sleeve sealing portion 51, that is, when the spool 60 is located at the other end of the stroke section, the hydraulic fluid advances from the oil pump 8 The fuel is supplied to the advancing chamber 202 via the corner supply oil passage RAs. At this time, the hydraulic oil is discharged from the retardation chamber 201 to the oil pan 7 via the retardation drain oil passage RRd. Furthermore, part of the hydraulic oil flowing through the retarded drain oil passage RRd is returned to the axial supply oil passage RsA side and the advance angle supply oil passage RAs side via the recycle oil passage Rre. Thus, the hydraulic oil discharged from the retardation chamber 201 can be reused. At this time, backflow from the axial direction supply oil passage RsA side to the drain oil passage side in the recycle oil passage Rre is suppressed by the recycle check valve 81.

  The present embodiment further includes a lock pin 33 (see FIGS. 1 and 2). The lock pin 33 is formed in a cylindrical shape with a bottom, and is accommodated in the accommodation hole 321 formed in the vane 32 so as to be capable of reciprocating in the axial direction. A spring 34 is provided inside the lock pin 33. The spring 34 biases the lock pin 33 toward the plate portion 222 of the case 22. An insertion recess 25 is formed on the vane 32 side of the plate portion 222 of the case 22.

  The lock pin 33 can be fitted into the fitting recess 25 when the vane rotor 30 is at the most retarded position with respect to the housing 20. When the lock pin 33 is fitted into the fitting recess 25, relative rotation of the vane rotor 30 with respect to the housing 20 is restricted. On the other hand, when the lock pin 33 is not inserted into the insertion recess 25, relative rotation of the vane rotor 30 with respect to the housing 20 is permitted.

  A pin control oil passage 304 communicating with the advance angle chamber 202 is formed between the lock pin 33 of the vane 32 and the advance angle chamber 202 (see FIG. 2). The pressure of the hydraulic fluid flowing from the advance angle chamber 202 into the pin control oil passage 304 acts in the direction in which the lock pin 33 comes out of the insertion recess 25 against the biasing force of the spring 34.

  In the valve timing adjusting device 10 configured as described above, when the hydraulic fluid is supplied to the advancing chamber 202, the hydraulic fluid flows into the pin control oil passage 304, and the lock pin 33 gets out of the fitting recess 25 and the housing The relative rotation of the vane rotor 30 with respect to 20 is permitted.

  Next, the operation of the valve timing adjustment device 10 will be described. The valve timing adjustment device 10 presses the spool 60 of the hydraulic oil control valve 11 by the drive of the linear solenoid 9, and connects the hydraulic oil control valve 11 to the oil pump 8 and the retard chamber 201, And a second operating state in which the retardation chamber 201 and the oil pan 7 are connected while the oil pump 8 and the advancing chamber 202 are connected, and a first operating state in which the oil pump 7 and the oil pan 7 are connected; Operates in the phase holding state that holds the phase of the phase conversion unit PC by interrupting the retardation chamber 201 and the advancing chamber 202 and the oil pan 7 while connecting the retarding chamber 201 and the advancing chamber 202 Let

In the first operating state, while the hydraulic oil is supplied to the retardation chamber 201 via the retardation supply oil passage RRs, the hydraulic oil from the advancing chamber 202 to the oil pan 7 via the advancing drain oil passage RAd. Will be returned. Further, the hydraulic oil is returned from the advance drain oil passage RAd to the retarded supply oil passage RRs via the recycle oil passage Rre.
In the second operation state, the hydraulic oil is supplied to the advancing chamber 202 via the advancing oil supply passage RAs, and the operating oil is supplied to the oil pan 7 from the retarding chamber 201 via the retarding drain oil passage RRd. Will be returned. Further, the hydraulic oil is returned from the retarded drain oil passage RRd to the advanced angle supply oil passage RAs via the recycle oil passage Rre.
In the phase holding state, while the hydraulic oil is supplied to the retarding chamber 201 and the advancing chamber 202 via the retarding supply oil passage RRs and the advancing angle supply oil passage RAs, the operation of the retarding chamber 201 and the advancing chamber 202 is performed. Oil emissions are regulated.

When the rotational phase of the camshaft 3 is more advanced than the target value, the valve timing adjustment device 10 brings the hydraulic oil control valve 11 into the first operation state. Thus, the vane rotor 30 rotates relative to the housing 20 in the retardation direction, and the rotational phase of the camshaft 3 changes to the retardation side.
Further, when the rotational phase of the camshaft 3 is on the retard side of the target value, the valve timing adjustment device 10 brings the hydraulic oil control valve 11 into the second operation state. Thus, the vane rotor 30 rotates relative to the housing 20 in the advancing direction, and the rotational phase of the cam shaft 3 changes to the advancing side.
Further, when the rotational phase of the cam shaft 3 matches the target value, the valve timing adjustment device 10 brings the hydraulic oil control valve 11 into the phase holding state. Thereby, the rotational phase of the cam shaft 3 is held.

In the present embodiment, when the hydraulic oil control valve 11 is in the first operating state or the second operating state, the retarded oil supply path RRs side or the advance angle supplied oil path RAs side from the drain oil path side via the recycle oil path Rre. Hydraulic oil is returned to the Thereby, the hydraulic oil discharged from the advance chamber 202 or the retard chamber 201 can be reused.
Further, when the hydraulic oil control valve 11 is in the first operating state or the second operating state, the recycle check valve 81 suppresses the backflow from the respective supply oil paths in the recycle oil path Rre to the drain oil path.

  Further, in the present embodiment, when the hydraulic oil control valve 11 is in the phase holding state, that is, even when the phase of the phase conversion unit PC is held, the hydraulic oil is supplied to the retarding chamber 201 and the advancing chamber 202. It can be supplied. That is, when the phase conversion unit PC holds the phase, the phase conversion unit generated by suctioning air into the retardation chamber 201 and the advancing chamber 202 while maintaining the supply state of the hydraulic oil to the retarding chamber 201 and the advancing chamber 202 It is possible to suppress the phase shift of the PC.

As described above, (1) the present embodiment is the valve timing adjustment device 10 that adjusts the valve timing of the intake valve 4 of the engine 1, and the phase conversion unit PC, the hydraulic oil supply source OS, and the hydraulic oil control unit The OC, the oil discharge portion OD, the retarded supply oil passage RRs, the advanced supply oil passage RAs, the delayed drain oil passage RRd as a drain oil passage, the advanced drain oil passage RAd, the recycle oil passage Rre and the recycle check valve 81 Is equipped.
The phase conversion unit PC has a retardation chamber 201 and an advancing chamber 202.
The hydraulic oil source OS supplies hydraulic oil to the retardation chamber 201 and the advancing chamber 202.
The hydraulic oil control unit OC controls the hydraulic oil supplied from the hydraulic oil supply source OS to the retardation chamber 201 and the advancing chamber 202.
The oil discharger OD discharges the hydraulic oil from the retarding angle chamber 201 or the advancing angle chamber 202.

The retardation supply oil passage RRs connects the hydraulic oil supply source OS and the retardation chamber 201 via the hydraulic oil control unit OC.
The advance angle supply oil passage RAs connects the hydraulic oil supply source OS and the advance angle chamber 202 via the hydraulic oil control unit OC.
The retarding drain oil passage RRd and the advancing drain oil passage RAd connect the retarding chamber 201 and the advancing chamber 202 to the oil discharge portion OD.
The recycled oil passage Rre connects the delayed drain oil passage RRd, the advanced drain oil passage RAd, and the delayed supply oil passage RRs and the advanced supply oil passage RAs. Thereby, it is possible to reuse the hydraulic oil from the retardation chamber 201 and the advancing chamber 202.

The recycle check valve 81 allows only the flow of hydraulic fluid from the drain oil side to the retarded supply side RRs and the advance side oil supply RAs in the recycled oil path Rre. Thereby, it is possible to suppress the flow of the hydraulic oil from each supply oil passage side to the drain oil passage side, that is, the reverse flow. Therefore, the responsiveness of the valve timing adjustment device 10 can be improved.
In the present embodiment, the recycle oil passage Rre is connected to the drain oil passage inside the hydraulic oil control unit OC. Therefore, by forming the recycled oil passage Rre inside the hydraulic oil control unit OC, the opening for the recycled oil passage Rre can be reduced, and in the hydraulic oil control unit OC, the drain oil passage is retarded opening OR and advanced. By forming the corner opening OA, the opening for the drain oil passage can be reduced. Thereby, the opening for each oil passage formed in the outer wall of the hydraulic oil control unit OC can be reduced. Therefore, the physique of hydraulic oil control part OC can be made small in the direction in which openings are arranged.

(2) In the present embodiment, the hydraulic oil control unit OC includes a cylindrical sleeve 400, a cylindrical spool 60 provided inside the sleeve 400 and forming a specific space Ss with the sleeve 400, and drain oil A drain opening Od1 connected to the specific space Ss in the passage and extending in the radial direction of the sleeve 400 or the spool 60 from the specific space Ss, and a specific opening Ss connected to the specific space Ss in the recycle oil passage Rre It has a recycle opening Ore formed to extend to the opposite side to the portion Od1.
The recycle oil passage Rre is connected to the drain oil passage in the specific space Ss.
By forming the drain opening Od1 and the recycling opening Ore in directions opposite to each other in the radial direction of the sleeve 400 or the spool 60, the drain oil passage and the recycling oil are avoided while avoiding mutual interference inside the hydraulic oil control valve 11. A road Rre can be provided.

  (3) In the present embodiment, the drain opening portion Od1 is formed such that at least a part thereof overlaps the recycling opening portion Ore in the axial direction of the sleeve 400 or the spool 60. Therefore, the axial length of the hydraulic oil control valve 11 can be reduced.

(4) In the present embodiment, the drain opening portion Od1 is formed in the spool 60 so as to extend inward in the radial direction of the sleeve 400 or the spool 60 from the specific space Ss.
The recycle opening Ore is formed in the sleeve 400 so as to extend radially outward of the sleeve 400 or the spool 60 from the specific space Ss.
Thus, a space equivalent to the atmospheric pressure can be formed at the central portion of the hydraulic oil control valve 11, and a pressurized space for hydraulic oil supply can be formed outside the space. Therefore, spaces having different pressures can be separated into two complete layers on the inner side of the hydraulic oil control valve 11, and the leakage of hydraulic oil from the seal portion can be suppressed.

(5) In the present embodiment, the spool 60 is recessed inward in the radial direction from the outer peripheral wall and forms a retarded supply recess HRs that forms a part of the retarded retarded supply oil passage RRs, and is recessed inward in the radial direction from the outer peripheral wall. A retarded drain recess HRd forming part of a retarded drain oil passage RRd communicating the chamber 201 with the oil discharge portion OD, and recessed inwardly from the outer peripheral wall communicate the advance chamber 202 with the oil discharge portion OD. An advance drain recess HAd forming part of the advance drain oil passage RAd, and an advance feed recess HAs forming a part of the advance supply oil passage RAs, recessed inward in the radial direction from the outer peripheral wall .
The retardation supply recess HRs, the retardation drain recess HRd, the advance drain recess HAd, and the advance supply recess HAs are formed in this order in the axial direction of the spool 60.
The retardation drain recess HRd and the advance drain recess HAd are integrally formed to form a specific space Ss.
The recycle check valve 81 is provided to correspond to the recycle opening Ore.
As a result, with one recycle check valve 81, it is possible to realize reuse of hydraulic oil on both the retard side and the advance side.

(6) In the present embodiment, the sleeve 400 has an axial supply oil passage RsA extending in the axial direction of the sleeve 400 in the retarded supply oil passage RRs and the advance supply oil passage RAs.
When the hydraulic oil is supplied from the axial end of the sleeve 400, the hydraulic oil can be easily flowed to the retarded supply oil passage RRs and the advance supply oil passage RAs by the axial supply oil passage RsA. Further, the retarded supply oil passage RRs and the advance supply passage RAs can be communicated with each other on the inner side of the hydraulic oil control valve 11 by the axial supply passage RsA.

  (7) In the present embodiment, the recycle oil passage Rre connects the drain oil passage and the axial supply oil passage RsA. Thus, the recycle oil passage Rre connects the drain oil passage with the retarded supply oil passage RRs and the advance supply oil passage RAs.

(8) In the present embodiment, the sleeve 400 includes the outer sleeve 40 and the inner sleeve 50 provided inside the outer sleeve 40.
The axial supply oil passage RsA is formed at an interface T1 between the outer sleeve 40 and the inner sleeve 50. Therefore, the axial supply oil passage RsA can be easily formed inside the sleeve 400.

(9) In the present embodiment, the inner peripheral wall of the outer sleeve 40 is formed in a cylindrical surface shape. A flow passage groove 52 forming an axial supply oil passage RsA is formed on the outer peripheral wall of the inner sleeve 50. In the present embodiment, the hardness of the outer sleeve 40 is set to be higher than the hardness of the inner sleeve 50.
(11) In the present embodiment, the outer sleeve 40 has higher hardness than the portion of the inner sleeve 50 having the lowest hardness. Therefore, it is possible to easily form an oil passage such as the axial supply oil passage RsA in the inner sleeve 50 while providing the outer sleeve 40 with a fastening function portion (screw portion 41) with another member.

  (12) In the present embodiment, the recycle check valve 81 is formed so as to be elastically deformable in the radial direction. Therefore, the configuration of the recycle check valve 81 can be simplified, and the recycle check valve 81 can be disposed in a space-saving manner, whereby pressure loss of hydraulic oil can be reduced.

  (13) In the present embodiment, the sleeve 400 has the movement restricting portion 513 capable of restricting the movement of the recycle check valve 81 in the axial direction. Therefore, it is possible to suppress the reduction of the function of the recycle check valve 81 as a check valve by shifting the recycle check valve 81 from the recycle opening Ore.

(14) The present embodiment is provided with the sleeve sealing portion 51.
The sleeve sealing portion 51 closes one end of the inner sleeve 50 to form a volume variable space Sv between which the sleeve sealing portion 51 and the spool 60 change in volume.
The variable volume space Sv is in communication with the drain oil passage. Therefore, the variable volume space Sv can be opened to the atmosphere via the drain oil passage. Thereby, the pressure of the volume variable space Sv can be made equal to the atmospheric pressure, and the axial movement of the spool 60 can be made smooth.
Further, the hydraulic oil control valve 11 can be miniaturized by sharing the space inside the spool 60 between the passage connecting the volume variable space Sv and the atmosphere and the drain oil passage.

(15) The present embodiment includes the housing 20.
The housing 20 forms a retardation chamber 201 and an advancement chamber 202. That is, the housing 20 is a part of the phase conversion unit PC.
The hydraulic oil control unit OC is provided so as to be at least partially located inside the housing 20. Therefore, the phase conversion unit PC and the hydraulic oil control unit OC can be integrally provided, and the pressure loss of the hydraulic oil from the hydraulic oil control unit OC to the phase conversion unit PC can be suppressed. Can be configured compactly.

Second Embodiment
A part of the valve timing control apparatus according to the second embodiment is shown in FIG. The second embodiment differs from the first embodiment in the configuration and the like of the hydraulic oil control valve 11.
In the second embodiment, the inner sleeve 50 has a first inner sleeve 501 and a second inner sleeve 502.

  The first inner sleeve 501 is formed in a substantially cylindrical shape, for example, of a material having a relatively low hardness, such as a resin. That is, the first inner sleeve 501 is formed of a material whose hardness is lower than that of the outer sleeve 40.

  The second inner sleeve 502 is formed in a substantially cylindrical shape, for example, of a relatively hard material including iron. That is, the second inner sleeve 502 is formed of a material having a hardness higher than that of the first inner sleeve 501.

  The first inner sleeve 501 is provided on the inner side of the outer sleeve 40 so that the outer peripheral wall is fitted to the inner peripheral wall of the outer sleeve 40. The first inner sleeve 501 can not move relative to the outer sleeve 40.

  The second inner sleeve 502 is provided on the inside of the first inner sleeve 501 so that the outer peripheral wall is fitted to the inner peripheral wall of the first inner sleeve 501. The second inner sleeve 502 can not move relative to the first inner sleeve 501.

The retardation supply opening ORs extends in the radial direction of the sleeve 400 and connects the space inside the second inner sleeve 502 to the cylindrical space St1 outside the first inner sleeve 501 and the axial supply oil passage RsA. It is formed. The restriction groove portion 511 is not formed in the second inner sleeve 502.
The advance angle supply opening OAs is formed to extend in the radial direction of the sleeve 400 and connect the space inside the second inner sleeve 502 to the annular space St2 outside the first inner sleeve 501 and the axial supply oil passage RsA. It is done. The restriction groove 512 is not formed in the second inner sleeve 502.

The retarded opening OR is formed to extend in the radial direction of the sleeve 400 and connect the space inside the second inner sleeve 502 and the space outside the outer sleeve 40.
The advance opening OA is formed to extend in the radial direction of the sleeve 400 and connect the space inside the second inner sleeve 502 and the space outside the outer sleeve 40.

  The recycle opening Ore is formed to extend in the radial direction of the sleeve 400 and connect the space inside the second inner sleeve 502 to the movement restricting portion 513 and the axial supply oil passage RsA. The movement restricting portion 513 is formed in the first inner sleeve 501.

The second embodiment includes a sealing body 45 and a reed valve 70.
The sealing body 45 is formed in a plate shape, and is provided on the inside of the outer sleeve 40 so as to close the end of the outer sleeve 40 opposite to the locking portion 59. The sealing body 45 has a flow path hole 451. The flow path hole 451 is formed to penetrate the sealing body 45 in the plate thickness direction. In the flow path hole portion 451, a retarded supply oil passage RRs and an advanced supply oil passage RAs are formed. A filter 58 is provided on the opposite side of the sealing body 45 to the inner sleeve 50.

As shown in FIG. 14, the reed valve 70 is formed in a circular shape, for example, by a thin metal plate. The reed valve 70 has an opening 702, a support 703, and a valve 701.
The opening 702 is formed to penetrate the reed valve 70 in the thickness direction. The support portion 703 is formed to extend from the inner edge of the opening 702 into the opening 702. The valve portion 701 is formed in a circular shape, and is integrally formed with the support portion 703 so as to be connected to the tip end portion of the support portion 703. The support portion 703 supports the valve portion 701. In the reed valve 70, the valve portion 701 and the support portion 703 can be elastically deformed.
Here, the valve portion 701 corresponds to the retardation supply check valve 71 and the advance supply check valve 72. That is, in the present embodiment, the retard supply check valve 71 and the advance supply check valve 72 are integrally formed in the reed valve 70.
The reed valve 70 is provided on the surface of the sealing body 45 on the inner sleeve 50 side so that the valve portion 701 corresponds to the flow path hole portion 451.

When hydraulic oil flows from the flow path hole 451 side to the inner sleeve 50 side in the retarded supply oil passage RRs and the advance angle supply oil passage RAs, the valve portion 701 is pushed toward the inner sleeve 50 by the hydraulic oil. At this time, the support portion 703 and the valve portion 701 are elastically deformed, and the valve portion 701 is separated from the flow path hole portion 451. Thereby, the flow of hydraulic fluid from the flow passage hole 451 side to the inner sleeve 50 side is allowed.
On the other hand, when the hydraulic oil flows from the inner sleeve 50 side to the flow passage hole 451 in the retardation supply oil passage RRs and the advance supply oil passage RAs, the valve portion 701 is pressed against the sealing body 45 and the flow passage hole Close 451 Thereby, the flow of hydraulic fluid from the inner sleeve 50 side to the flow path hole 451 side is restricted.
The configuration of the second embodiment is the same as that of the first embodiment except for the points described above.

  As described above, (10) In the present embodiment, the inner sleeve 50 is provided on the inner side of the first inner sleeve 501 and the first inner sleeve 501 and has a hardness higher than that of the first inner sleeve 501. It has a sleeve 502. Thus, the oil passage can be easily formed in the first inner sleeve 501, and the wear resistance of the inner peripheral wall of the second inner sleeve 502 sliding on the spool 60 can be improved.

  (11) In the present embodiment, the outer sleeve 40 has a hardness higher than that of the portion of the inner sleeve 50 having the lowest hardness (the first inner sleeve 501). Therefore, it is possible to easily form an oil passage such as the axial oil supply passage RsA in the inner sleeve 50 (first inner sleeve 501) while providing the outer sleeve 40 with a fastening function portion (screw portion 41) with another member. it can.

Third Embodiment
A valve timing adjustment device according to a third embodiment will be described based on FIGS. The third embodiment is different from the first embodiment in the shapes and the like of the retardation supply check valve 71, the advance supply check valve 72, and the recycle check valve 81.

  In the third embodiment, as in the first embodiment, the retardation supply check valve 71 is formed in a substantially cylindrical shape by bending, for example, a rectangular metal thin plate along the circumferential direction in the longitudinal direction. FIG. 15 is a diagram in which the retardation supply check valve 71 is developed. FIG. 16 is a cross-sectional view of the retard supply check valve 71 at an axial intermediate position.

In the third embodiment, the retarded supply check valve 71 includes an overlapping portion 700, an opening portion 702, a support portion 703, and a valve portion 701.
The overlapping portion 700 is formed at one end of the retardation supply check valve 71 in the circumferential direction. The overlapping portion 700 is formed so as to overlap the radially outer side of the other end portion in the circumferential direction of the retardation supply check valve 71 (see FIG. 15).

Four openings 702 are formed at equal intervals in the circumferential direction of the retardation supply check valve 71.
The support portion 703 is formed to extend from the inner edge of each of the four openings 702 in the circumferential direction of the retardation supply check valve 71.

  The valve portion 701 is formed to be connected to the distal end portion of the support portion 703. Here, four valve portions 701 are formed at equal intervals in the circumferential direction of the retardation supply check valve 71.

  The retardation supply check valve 71 is provided in the restriction groove 511 of the inner sleeve 50. The retard supply check valve 71 is provided such that the support portion 703 and the valve portion 701 can be elastically deformed in the radial direction inside the restriction groove portion 511. Here, the retardation supply check valve 71 is provided such that the four valve portions 701 correspond to the four retardation supply openings ORs, respectively. That is, in the present embodiment, four retardation supply openings ORs are formed at equal intervals in the circumferential direction of the inner sleeve 50.

The configuration of the advance angle supply check valve 72 is the same as that of the retarded angle supply check valve 71, so a detailed description of the configuration will be omitted.
The advance supply check valve 72 is provided in the restriction groove 512 of the inner sleeve 50. The advance angle supply check valve 72 is provided such that the support portion 703 and the valve portion 701 can be elastically deformed in the radial direction inside the restriction groove portion 512. Here, the advance supply check valve 72 is provided so that the four valve portions 701 correspond to the four advance supply openings OAs, respectively. That is, in the present embodiment, four advance angle supply openings OAs are formed at equal intervals in the circumferential direction of the inner sleeve 50.

The configuration of the recycle check valve 81 is the same as that of the retarded angle supply check valve 71 except for the difference in outer diameter, and thus the detailed configuration will not be described.
The recycle check valve 81 is provided in the movement restricting portion 513 of the inner sleeve 50. In the recycle check valve 81, the support portion 703 and the valve portion 701 are provided so as to be elastically deformable in the radial direction inside the movement restricting portion 513. Here, the recycle check valve 81 is provided so that the four valve parts 701 correspond to the four recycle openings Ore, respectively. That is, in the present embodiment, four recycling openings Ore are formed at equal intervals in the circumferential direction of the inner sleeve 50.
The third embodiment is the same as the first embodiment except for the points described above.

Fourth Embodiment
A valve timing adjustment device according to a fourth embodiment will be described based on FIG. The fourth embodiment is different from the first embodiment in the shapes and the like of the retardation supply check valve 71, the advance supply check valve 72, and the recycle check valve 81.
In the fourth embodiment, as in the first embodiment, the retardation supply check valve 71 is formed in a substantially cylindrical shape by bending, for example, a rectangular metal thin plate along the circumferential direction in the longitudinal direction. FIG. 17 is a diagram in which the retardation supply check valve 71 is developed.

In the fourth embodiment, the retardation supply check valve 71 has an overlapping portion 700 and a notch portion 704.
The overlapping portion 700 is formed at one end of the retardation supply check valve 71 in the circumferential direction. The overlapping portion 700 is formed so as to overlap the radially outer side of the other end portion in the circumferential direction of the retardation supply check valve 71.

  The notches 704 are formed such that both axial ends of the retardation supply check valve 71 are cut out in the axial direction. A plurality of notch portions 704 are formed at intervals in the circumferential direction of the retardation supply check valve 71.

The retardation supply check valve 71 is provided in the restriction groove 511 of the inner sleeve 50. The retarded supply check valve 71 is provided so as to be elastically deformable in the radial direction on the inner side of the regulation groove 511.
The hydraulic fluid can flow through the notch 704 when the retarded supply check valve 71 is deformed radially inward or radially outward. Therefore, it is possible to suppress the hydraulic oil around the retarded supply check valve 71 from inhibiting the radial deformation of the retarded supply check valve 71. Thereby, the operation of the on-off valve of the retardation supply check valve 71 can be made smooth.

The configuration of the advance angle supply check valve 72 is the same as that of the retarded angle supply check valve 71, so a detailed description of the configuration will be omitted.
The advance supply check valve 72 is provided in the restriction groove 512 of the inner sleeve 50. The advance angle supply check valve 72 is provided so as to be elastically deformable in the radial direction inside the restriction groove 512.
The hydraulic fluid can flow through the notch 704 when the advance supply check valve 72 is deformed radially inward or radially outward. Therefore, it is possible to suppress the hydraulic oil around the advance supply check valve 72 from inhibiting the radial deformation of the advance supply check valve 72. Thereby, the operation of the on-off valve of the advance supply check valve 72 can be made smooth.

The configuration of the recycle check valve 81 is the same as that of the retarded angle supply check valve 71 except for the difference in outer diameter, and thus the detailed configuration will not be described.
The recycle check valve 81 is provided in the movement restricting portion 513 of the inner sleeve 50. The recycle check valve 81 is provided so as to be elastically deformable in the radial direction inside the movement restricting portion 513.
When the recycle check valve 81 deforms radially inward or radially outward, hydraulic fluid can flow through the notch 704. Therefore, it is possible to suppress that the hydraulic oil around the recycle check valve 81 inhibits the radial deformation of the recycle check valve 81. Thereby, the operation of the on-off valve of the recycle check valve 81 can be made smooth.
The configuration of the sixth embodiment is the same as that of the first embodiment except for the points described above.

(Other embodiments)
In another embodiment of the present invention, the drain opening Od1 may not be formed such that at least a part thereof overlaps with the recycling opening Ore in the axial direction of the sleeve 400 or the spool 60.

  Further, in the above embodiment, the flow passage groove portion 52 (axial direction oil supply passage RsA) is formed on the interface T1 between the outer sleeve 40 and the inner sleeve 50 so as to be recessed radially inward from the outer peripheral wall of the inner sleeve 50. An example is shown. On the other hand, in the other embodiment of the present invention, the flow passage groove portion 52 is formed on the interface T1 between the outer sleeve 40 and the inner sleeve 50 so as to be recessed radially outward from the inner peripheral wall of the outer sleeve 40. It is also good.

  Moreover, in the above-mentioned 1st, 2nd embodiment, the outer sleeve 40 was formed with the material containing iron, and the example which forms the inner sleeve 50 with the material containing aluminum was shown. On the other hand, in another embodiment of the present invention, the inner sleeve 50 may be made of any material as long as the hardness is lower than that of the outer sleeve 40. The outer sleeve 40 may be made of any material as long as the hardness is higher than that of the inner sleeve 50. The inner sleeve 50 may not be subjected to surface hardening treatment.

  In the second embodiment described above, an example is shown in which the outer sleeve 40 is formed of a material containing iron, the first inner sleeve 501 is formed of a resin, and the second inner sleeve 502 is formed of a material containing iron. . On the other hand, in another embodiment of the present invention, the first inner sleeve 501 may be made of any material as long as the hardness is lower than that of the outer sleeve 40 and the second inner sleeve 502. . The outer sleeve 40 may be made of any material as long as the hardness is higher than that of the first inner sleeve 501. The second inner sleeve 502 may be made of any material as long as the hardness is higher than that of the first inner sleeve 501.

  Further, in another embodiment of the present invention, the hydraulic oil control valve 11 may be provided such that all the parts are located outside the housing 20. In this case, the outer sleeve 40 can omit the threaded portion 41. Further, in this case, both the outer sleeve 40 and the inner sleeve 50 may be formed of a material containing aluminum. In this case, the material cost can be reduced while securing the strength of the outer sleeve 40 and the inner sleeve 50.

  Further, in another embodiment of the present invention, the housing 20 and the crankshaft 2 may be connected by a transmission member such as a belt instead of the chain 6.

  Moreover, in the above-mentioned embodiment, the vane rotor 30 was fixed to the edge part of the cam shaft 3, and the example which the housing 20 rotates interlockingly with the crankshaft 2 was shown. On the other hand, in another embodiment of the present invention, the vane rotor 30 may be fixed to the end of the crankshaft 2 and the housing 20 may rotate in conjunction with the camshaft 3.

The valve timing adjustment device 10 of the present invention may adjust the valve timing of the exhaust valve 5 of the engine 1.
Thus, the present disclosure is not limited to the above embodiment, and can be implemented in various forms without departing from the scope of the present disclosure.

DESCRIPTION OF SYMBOLS 1 engine (internal combustion engine), 4 intake valve (valve), 5 exhaust valve (valve), 10 valve timing adjustment apparatus, PC phase conversion part, 201 retard chamber, 202 advance chamber, OS hydraulic oil supply source, 8 oil Pump (hydraulic oil supply source), OC hydraulic oil control unit, 11 hydraulic oil control valve (hydraulic oil control unit), OD oil discharge unit, 7 oil pan (oil discharge unit), RRs retarded oil supply path, RAs advance angle Supply oil path, RRd Retarded drain oil path (Drain oil path), RAd Advance oil drain path (Drain oil path), Rre Recycled oil path, 81 Recycle check valve

Claims (15)

A valve timing controller (10) for adjusting the valve timing of valves (4, 5) of an internal combustion engine (1), comprising
A phase converter (PC) having a retardation chamber (201) and an advancing chamber (202);
A hydraulic oil supply source (OS) for supplying hydraulic oil to the retarding chamber and the advancing chamber;
A hydraulic fluid control unit (OC) for controlling hydraulic fluid supplied from the hydraulic fluid supply source to the retarding chamber and the advancing chamber;
An oil discharge unit (OD) that discharges the hydraulic oil from the retard chamber or the advance chamber;
Retarded oil supply passages (RRs) connecting the hydraulic oil supply source and the retardation chamber via the hydraulic oil control unit;
Advance angle supply oil paths (RAs) connecting the hydraulic oil supply source and the advance angle chamber via the hydraulic oil control unit;
Drain oil passages (RRd, RAd) connecting the retarding chamber and the advancing chamber to the oil discharger;
A recycled oil passage (Rre) connecting the drain oil passage, the retarded oil supply passage, and the advance oil passage;
And a recycle check valve (81) for permitting only the flow of hydraulic fluid from the drain oil side to the retarded supply side and the advance supply side in the recycled oil path.
The valve timing adjustment device, wherein the recycled oil passage is connected to the drain oil passage inside the hydraulic fluid control unit. The hydraulic oil control unit includes a cylindrical sleeve (400), a cylindrical spool (60) provided inside the sleeve and forming a specific space (Ss) with the sleeve, the drain oil passage in the drain oil passage A drain opening (Od1) connected to a specific space and extending in the radial direction of the sleeve or the spool from the specific space, and connected to the specific space in the recycle oil passage, the drain opening from the specific space With a recycle opening (Ore) formed to extend away from the
The valve timing adjustment device according to claim 1, wherein the recycled oil passage is connected to the drain oil passage in the specific space.   The valve timing adjusting device according to claim 2, wherein the drain opening is formed such that at least a part thereof overlaps with the recycle opening in the axial direction of the sleeve or the spool. The drain opening is formed in the spool so as to extend radially inward of the sleeve or the spool from the specific space.
The valve timing adjusting device according to claim 2 or 3, wherein the recycle opening is formed in the sleeve so as to extend radially outward of the sleeve or the spool from the specific space. The spool is recessed inwardly in the radial direction from the outer peripheral wall to form a retarded supply recess (HRs) that forms a part of the retarded oil supply passage, and recessed inwardly from the outer peripheral wall in the radial direction and the retarded chamber and the oil discharge portion A retarded drain recess (HRd), which forms a part of the drain oil passage communicating with each other, and a part of the drain oil passage recessed between the outer peripheral wall radially inward and communicating the advance chamber and the oil discharging portion An advance drain recess (HAd) to be formed, and an advance feed recess (HAs) recessed radially inward from the outer peripheral wall to form a part of the advance feed oil passage,
The retardation supply recess, the retardation drain recess, the advance drain recess, and the advance supply recess are formed in this order in the axial direction of the spool.
The retardation drain recess and the advance drain recess are integrally formed to form the specific space,
The valve timing adjustment device according to any one of claims 2 to 4, wherein the recycle check valve is provided to correspond to the recycle opening.   The sleeve according to any one of claims 2 to 5, wherein the sleeve has an axial supply oil passage (RsA) extending in the axial direction of the sleeve in the retardation supply oil passage and the advance supply oil passage. Valve timing adjustment device.   The valve timing adjustment device according to claim 6, wherein the recycled oil passage connects the drain oil passage and the axial supply oil passage. The sleeve comprises an outer sleeve (40) and an inner sleeve (50) provided inside the outer sleeve,
The valve timing adjusting device according to claim 6 or 7, wherein the axial supply oil passage is formed at an interface (T1) between the outer sleeve and the inner sleeve. One of the inner peripheral wall of the outer sleeve or the outer peripheral wall of the inner sleeve is formed in a cylindrical shape.
The valve timing adjusting device according to claim 8, wherein a flow passage groove (52) forming the axial direction oil supply passage is formed on the other of the inner peripheral wall of the outer sleeve or the outer peripheral wall of the inner sleeve.   The inner sleeve comprises a first inner sleeve (501) and a second inner sleeve (502) provided inside the first inner sleeve and having a hardness higher than that of the first inner sleeve. The valve timing controller according to or 9.   The valve timing adjustment device according to any one of claims 8 to 10, wherein the outer sleeve has a hardness higher than that of a portion of the inner sleeve having the lowest hardness.   The valve timing adjustment device according to any one of claims 1 to 11, wherein the recycle check valve is formed so as to be elastically deformable in a radial direction.   The valve timing adjusting device according to claim 12, wherein the sleeve has a movement restricting portion (513) capable of restricting the axial movement of the recycle check valve. It further comprises a sleeve seal (51) that closes one end of the sleeve and forms a variable volume space (Sv) with the spool to change the volume.
The valve timing adjusting device according to any one of claims 1 to 13, wherein the variable volume space is in communication with the drain oil passage. It further comprises a housing (20) forming the retardation chamber and the advancing chamber,
The valve timing adjusting device according to any one of claims 1 to 14, wherein the hydraulic oil control unit is provided so as to be at least partially located inside the housing.

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