JP2014020385A - Oil passage structure of transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To compactly fix a base end of a pipe member for supplying oil to a hydraulic control part of a transmission or a lubricated part to a transmission case while ensuring a sealing property.
An oil passage 33e and a support hole 33c are formed in an inner wall surface 33a of a mission case 30, and a separate plate 36 is fixed to the inner wall surface 33a in a state where a collar 35 is fitted in the support hole 33c. 33e and the support hole 33c are closed, and the collar 35 is held in the support hole 33c. In this state, the pipe member 34 is inserted into the collar 35 through the separate plate 36. Thus, the oil can be sealed between the collar 35 and the separate plate 36 without the need for a special sealing member by pressing the collar 35 against the separate plate 36 with the oil pressure of the oil. Can be avoided.
[Selection] Figure 2

Description

  The present invention relates to a transmission oil passage structure in which a pipe member connected to an oil supply source is disposed between a plurality of transmission shafts of a transmission along an axial direction of the transmission shaft.

  The base end of the pipe member is press-fitted and fixed to a press-fitting hole formed in the inner wall surface of the transmission case of the metal belt type continuously variable transmission, and the oil supplied to the inside of the pipe member from the oil passage formed inside the transmission case is supplied. Patent Document 1 listed below discloses that a drive pulley, a driven pulley, and a metal belt are jetted from an oil hole of a pipe member.

Japanese Patent No. 4745305

  By the way, in the above conventional one, since the pipe member is directly press-fitted and fixed in the press-fitting hole formed in the transmission case, the strength of the pipe member becomes insufficient unless the press-fitting hole is deepened sufficiently. There is a possibility that the sealing performance is insufficient.

  Further, as in the conventional example shown in FIG. 6, a pipe member 02 is press-fitted into a press-fitting hole 01a formed in the mission case 01, and a first oil passage 01b in which the press-fitting hole 01a is extended, and a second oil passage 01c orthogonal thereto. When the oil is supplied from the third oil passage 01d to the pipe member 02 through the second oil passage 01c and the first oil passage 01b, the second oil passage 01c is machined using a drill or the like. In addition to the necessity, the opening end of the second oil passage 01c needs to be liquid-tightly closed with the bolt 03 and the washer 04, which increases the size of the transmission case 01 and increases the number of processing steps and parts. There is a problem.

  The present invention has been made in view of the above-described circumstances, and is intended to compactly fix the base end of a hydraulic pressure control component of a transmission and a pipe member that supplies oil to a lubricated portion to a transmission case while ensuring sealing performance. Objective.

  In order to achieve the above object, according to the first aspect of the present invention, a pipe member connected to an oil supply source is disposed between a plurality of transmission shafts of the transmission along the axial direction of the transmission shaft. In the oil passage structure, an oil passage recessed in an inner wall surface of the transmission case of the transmission, a support hole formed in the inner wall surface of the transmission case so as to communicate with the oil passage, and a collar fitted into the support hole And a separate plate that is fixed to the inner wall surface of the transmission case, closes the oil passage and the support hole, and holds the collar in the support hole, and the pipe member is a through hole formed in the separate plate. A transmission oil passage structure is proposed that is press-fitted into the collar. That.

  According to a second aspect of the present invention, in addition to the structure of the first aspect, the inner peripheral portion of the top surface of the collar that comes into contact with the separate plate is chamfered. A road structure is proposed.

  According to the invention described in claim 3, in addition to the configuration of claim 1 or claim 2, an oil injection port is formed in the pipe member, and the lubrication part of the transmission is formed from the oil injection port. An oil passage structure for a transmission characterized by supplying oil is proposed.

  The drive shaft 1 and the driven shaft 2 of the embodiment correspond to the transmission shaft of the present invention, and the drive pulley 5, the driven pulley 7 and the metal belt 9 of the embodiment correspond to the lubricated portion of the present invention. The intermediate plate 33 of the form corresponds to the transmission case of the present invention, and the metal belt type continuously variable transmission T of the embodiment corresponds to the transmission of the present invention.

  According to the configuration of the first aspect, since the pipe member connected to the oil supply source is arranged between the plurality of transmission shafts of the transmission along the axial direction of the transmission shaft, each part of the transmission is connected to each part of the transmission via the pipe member. Oil and lubricating oil can be supplied. An oil passage is recessed in the inner wall surface of the transmission mission case, a support hole is formed to communicate with the oil passage, and the separation plate is fixed to the inner wall surface of the transmission case with the collar fitted in the support hole. Thus, the oil passage and the support hole are closed, the collar is held in the support hole, and the pipe member is inserted into the collar through the through hole formed in the separate plate. As a result, the oil passage of the transmission case can be formed by a mold without machining the oil passage of the transmission case using a drill. Bolts and washers for closing the open end can be eliminated. In addition, by pressing the collar against the separate plate with the oil pressure of the oil supplied from the oil passage, the oil can be sealed between the collar and the separate plate without requiring a special seal member.

  According to the second aspect of the present invention, since the inner peripheral portion of the top surface of the collar that contacts the separate plate is chamfered, the operation of inserting the base end of the pipe member into the collar can be easily performed.

  According to the third aspect of the present invention, the oil injection port is formed in the pipe member, and the oil is supplied from the oil injection port to the lubricated portion of the transmission, so that the lubricated portion of the transmission can be effectively lubricated. it can.

The skeleton figure of the power transmission system of the vehicle carrying a metal belt type continuously variable transmission. The principal part front view of a metal belt type continuously variable transmission. FIG. 3 is an enlarged view taken along line 3-3 in FIG. 2. FIG. 4 is an enlarged sectional view taken along line 4-4 of FIG. The principal part perspective view of the inner wall face of an intermediate | middle case. Explanatory drawing of a prior art example.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, a metal belt type continuously variable transmission T for a vehicle includes a drive shaft 1 and a driven shaft 2 as transmission shafts arranged in parallel, and a left end of a crankshaft 3 of an engine E is a damper. 4 to the right end of the drive shaft 1.

  The drive pulley 5 supported by the drive shaft 1 includes a fixed pulley half 5a that is rotatable relative to the drive shaft 1 and a movable pulley that is axially slidable relative to the fixed pulley half 5a. Half body 5b. The groove width between the movable pulley half 5 b and the fixed pulley half 5 a is variable by the hydraulic pressure acting on the hydraulic oil chamber 6. The driven pulley 7 supported by the driven shaft 2 includes a fixed-side pulley half 7a formed integrally with the driven shaft 2 and a movable-side pulley half that is slidable in the axial direction with respect to the fixed-side pulley half 7a. And a body 7b. The groove width between the movable pulley half 7 b and the fixed pulley half 7 a is variable by the hydraulic pressure acting on the hydraulic oil chamber 8. And between the drive pulley 5 and the driven pulley 7, the metal belt 9 which attached many metal elements to the two metal ring aggregates is wound.

  A forward clutch 10 is engaged at the left end of the drive shaft 1 when establishing a forward shift stage and transmits the rotation of the drive shaft 1 to the drive pulley 5 in the same direction, and is engaged when establishing a reverse shift stage. A forward / reverse switching mechanism 12 comprising a single pinion planetary gear mechanism is provided, which includes a reverse brake 11 for transmitting the rotation of the drive shaft 1 to the drive pulley 5 in the reverse direction. The sun gear 27 of the forward / reverse switching mechanism 12 is fixed to the drive shaft 1, the planetary carrier 28 can be restrained to the casing by the reverse brake 11, and the ring gear 29 can be coupled to the drive pulley 5 by the forward clutch 10.

  The starting clutch 13 provided at the right end of the driven shaft 2 couples the first intermediate gear 14 supported on the driven shaft 2 so as to be rotatable relative to the driven shaft 2. A second intermediate gear 16 that meshes with the first intermediate gear 14 is provided on an intermediate shaft 15 disposed in parallel with the driven shaft 2. A third intermediate gear 20 provided on the intermediate shaft 15 meshes with an input gear 19 provided on the gear box 18 of the differential gear 17. The pair of pinions 22 and 22 supported on the gear box 18 via the pinion shafts 21 and 21 are meshed with side gears 25 and 26 provided at the front ends of the left axle 23 and the right axle 24 that are rotatably supported on the gear box 18. To do. Drive wheels W, W are connected to the ends of the left axle 23 and the right axle 24, respectively.

  As shown in FIG. 2, the transmission case 30 of the metal belt type continuously variable transmission T includes an intermediate plate 33 sandwiched between a case body 31 and a side cover 32, and the drive shaft 1 and the driven shaft 2 are connected to the intermediate plate 33. The shaft end is supported. The drive shaft 1 supports the forward / reverse switching mechanism 12, the stationary pulley half 5a of the drive pulley 5 and the movable pulley half 5b of the drive pulley 5 in order from the intermediate plate 33 side. The movable pulley half 7b of the driven pulley 7 and the fixed pulley half 7a of the driven pulley 7 are supported in this order from the intermediate plate 33 side.

  A base end of a pipe member 34 that injects oil for lubricating the drive pulley 5, the driven pulley 7, and the metal belt 9 is fixed to the inner wall surface 33 a of the intermediate plate 33. The pipe member 34 is a metal pipe bent in a crank shape, and an oil injection hole 34a is formed in the vicinity of the closed tip. The tip of the pipe member 34 extends so as to cross the rotation surface of the metal belt 9, the oil injection hole 34 a is located at the approximate center of the rotation surface of the metal belt 9, and the drive pulley 5 and the metal belt 9 are engaged with each other. Oriented to the department.

  When the gear ratio of the metal belt type continuously variable transmission T changes, the rotation locus of the metal belt 9 moves, but the injection nozzle 34 is disposed at a position where it does not interfere with the metal belt 9 at any gear ratio. Accordingly, the oil supplied from the oil pump (not shown) to the pipe member 34 during the operation of the metal belt type continuously variable transmission T is injected from the oil injection hole 34a to the drive pulley 5 and the metal belt 9, and the drive pulley 5 and The driven pulley 7 is also lubricated by the lubricating oil that is used to lubricate the metal belt 9 and adheres to the rotating metal belt 9.

  Next, the structure of the attachment portion of the pipe member 34 will be described in detail with reference to FIGS.

  The inner wall surface 33a constituting the split surface of the intermediate plate 33 is one step higher than the surrounding hollow recesses 33b, and a cylindrical support hole 33c and a plurality of screw holes 33d are formed on the inner wall surface 33a. Is done. A groove-like oil passage 33e is recessed in the inner wall surface 33a, and the downstream end of the oil passage 33e communicates with the bottom of the support hole 33c. A cylindrical collar 35 is fitted into the inside of the support hole 33c from the bottom surface 35a side, and a separate plate 36 made of a metal plate is superimposed on the inner wall surface 33a of the intermediate plate 33 to hold the top surface 35b of the collar 35. The separate plate 36 is fastened by screwing the bolts 37 to the screw holes 33d.

  Chamfers 35c and 35d are provided on the inner peripheral portions of the bottom surface 35a and the top surface 35b of the collar 35, and the base end of the pipe member 34 penetrating the through hole 36a formed in the separate plate 36 is from the chamfer 35d of the top surface 35b. Inserted into the collar 35. The collar 35 fitted into the support hole 33c is prevented from coming out of the support hole 33c when the top surface 35b abuts against the back surface of the separate plate 36. Since the pipe member 34 is rotatable with respect to the support hole 33c, the pipe member 34 can be rotated by means such as locking the tip of an arm (not shown) projecting radially from the pipe member 34 to the intermediate case 33. It is desirable to prevent the member 34 from rotating.

  Valve bodies 38 and 39 for accommodating hydraulic control valves and the like are superimposed on the separate plate 36 and fastened by a plurality of bolts 40 that are screwed to the intermediate plate 33.

  Next, the operation of the embodiment of the present invention having the above configuration will be described.

  First, the shifting action of the metal belt type continuously variable transmission T will be described. When the forward range is selected by the select lever, the forward clutch 10 is engaged by a command from the hydraulic control unit U2, and the drive shaft 1 is integrally coupled to the drive pulley 5. Subsequently, the starting clutch 13 is engaged, and the torque of the engine E is transmitted to the drive wheels W, W via the drive shaft 1, the drive pulley 5, the metal belt 9, the driven pulley 7, the driven shaft 2, and the differential gear 17, The vehicle starts moving forward. When the reverse range is selected with the select lever, the reverse brake 11 is engaged and the drive pulley 5 is driven in the direction opposite to the rotational direction of the drive shaft 1 in accordance with a command from the hydraulic control unit U2. The vehicle starts moving backward by the engagement.

  When the vehicle starts in this way, the hydraulic pressure supplied to the hydraulic oil chamber 6 of the drive pulley 5 in response to a command from the hydraulic control unit U2 increases, and the movable pulley half 5b of the drive pulley 5 is fixed to the fixed pulley half. As the effective radius increases toward 5a, the hydraulic pressure supplied to the hydraulic oil chamber 8 of the driven pulley 7 decreases, and the movable pulley half 7b of the driven pulley 7 moves away from the fixed pulley half 7a. As the effective radius decreases, the ratio of the metal belt type continuously variable transmission T continuously changes from the LOW side toward the OD side.

  During operation of the metal belt type continuously variable transmission T, oil supplied from an oil pump (not shown) is supplied from the oil passage 33e of the intermediate plate 33 to the bottom of the support hole 33c, and from there to the inside of the pipe member 34. It flows in and is injected toward the drive pulley 5 from the oil injection hole 34a. The oil that has lubricated the drive pulley 5 lubricates the metal belt 9 wound around the drive pulley 5, and further lubricates the driven pulley 7 around which the metal belt 9 is wound.

  The oil pressure supplied to the support hole 33c from the oil passage 33e of the intermediate plate 33 acts on both the bottom surface 35a and the top surface 35b of the collar 35 fitted in the support hole 33c in opposite directions. Since the area where the hydraulic pressure acts is larger on the bottom surface 35a side than on the top surface 35b side, the top surface 35b of the collar 35 is pressed against the back surface of the separate plate 36 and sealed by the differential hydraulic pressure. Oil leakage from around the collar 35 can be prevented without requiring a special seal member.

  If the pipe member 34 is directly press-fitted and fixed in the press-fitting hole formed in the intermediate plate 33, the sealing performance may not be ensured unless the press-fitting hole is sufficiently deep. However, in order to deepen the press-fitting hole, it is necessary to project a boss part on the inner wall surface 33a of the intermediate plate 33 and form a press-fitting hole at the center of the boss part. There is a problem of increasing the size. On the other hand, according to the present embodiment, since the pipe member 34 is supported by the support hole 33c via the collar 35, the pipe member 34 is simply formed by recessing the shallow support hole 33c in the inner wall surface 33a of the intermediate case 33. It is possible to firmly fix the seal case while securing the sealing property, and it is possible to avoid an increase in the size of the mission case 30.

  Compared with the conventional example described with reference to FIG. 6, in the present embodiment, there is no need to machine the oil path using a drill or the like in the intermediate plate 33, and the oil path (oil Since the passage 33e) can be configured, not only can the enlargement of the mission case 30 be avoided, but the number of parts can be reduced by eliminating bolts and washers for closing the open end of the machined oil passage. it can.

  Further, since the chamfer 35d is provided on the top surface 35b of the collar 35, the operation of inserting the pipe member 34 into the collar 35 can be easily performed. In addition, since the chamfers 35c and 35d having the same shape are provided on both the bottom surface 35a and the top surface 35b of the collar 35, it is not necessary to distinguish the bottom surface 35a and the top surface 35b when the collar 35 is fitted into the support hole 33c. Improves.

  The embodiments of the present invention have been described above, but various design changes can be made without departing from the scope of the present invention.

  For example, the transmission of the present invention is not limited to the metal belt type continuously variable transmission T of the embodiment.

  The mission case of the present invention is not limited to the intermediate plate 33 of the embodiment.

1 Drive shaft (transmission shaft)
2 Driven shaft (transmission shaft)
3 Drive pulley (lubricated part)
7 Driven pulley (lubricated part)
9 Metal belt (lubricated part)
33 Intermediate plate (mission case)
33a Inner wall surface 33c Support hole 33e Oil passage 34 Pipe member 34a Oil injection hole 35 Collar 35b Top surface 35d Chamfer 36 Separate plate 36a Through hole T Metal belt type continuously variable transmission (transmission)

Claims (3)

In a transmission oil passage structure in which a pipe member (34) connected to an oil supply source is disposed between the plurality of transmission shafts (1, 2) of the transmission (T) along the axial direction of the transmission shaft (1, 2). ,
An oil passage (33e) recessed in the inner wall surface (33a) of the transmission case (33) of the transmission (T);
A support hole (33c) formed in the inner wall surface (33a) of the mission case (33) so as to communicate with the oil passage (33e);
A collar (35) fitted into the support hole (33c);
A separate plate fixed to the inner wall surface (33a) of the transmission case (33) to close the oil passage (33e) and the support hole (33c) and to hold the collar (35) in the support hole (33c). (36)
The oil passage structure of a transmission, wherein the pipe member (34) is inserted into the collar (35) through a through hole (36a) formed in the separate plate (36).   The oil passage structure of the transmission according to claim 1, wherein a chamfer (35d) is applied to an inner peripheral portion of a top surface (35b) of the collar (35) that comes into contact with the separate plate (36).   An oil injection port (34a) is formed in the pipe member (34), and oil is supplied from the oil injection port (34a) to the lubricated parts (5, 7, 9) of the transmission (T). The oil passage structure of the transmission according to claim 1 or 2.

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