JPH0633247Y2 - Vehicle oil filter device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an oil filter device for a vehicle.

(Prior Art) In some vehicles such as tractors, an oil filter is provided at the bottom of the transmission case in order to supply lubricating oil (mission oil) to the rotating parts of the transmission and hydraulic equipment via a hydraulic pump. The oil filter has, for example, a cylindrical cover and a filter element that is detachably provided in the cover, and a plurality of oil infiltration holes communicating with the inside and outside are formed on the entire peripheral wall of the cover. Further, the cover is provided with a discharge port, and this discharge port is connected to a hydraulic pump provided in the transmission case.

(Problems to be solved by the invention) This type of oil filter may cause the upper part of the cover to come out of the lubricating oil when the vehicle is tilted to the front and rear. Inhaling air into the oil filter,
There was a problem of cavitation.

Also, it is difficult to remove and clean the oil filter in the transmission case because there are components of the power transmission system of the transmission above the oil filter.Therefore, the transmission case must be disassembled when cleaning. It was very troublesome.

In view of such conventional problems, the present invention has an object to easily attach and detach the oil filter from the outside of the transmission case, to facilitate maintenance of the oil filter, and to prevent cavitation from occurring.

(Means for Solving the Problems) As a means for solving the problem, the present invention is based on the mission case 1
In an oil filter device for a vehicle in which an oil filter 50 is provided on the bottom of the inside, and a discharge port 60 of this oil filter 50 is connected to a hydraulic pump 45, an opening 53 is formed in the bottom wall 1a of the mission case 1,
A bottom lid 51 for closing the opening 53 is detachably attached to the bottom wall 1a from the lower surface side, and a support cylinder 58 having a plurality of holes 57 in a peripheral wall 58b is erected on the upper surface of the bottom lid 51. The tubular filter element 55 is fitted onto the
A cover 59, which covers 55 from the upper side and has the discharge port 60 in the upper part, is provided at the upper end of the support cylinder 58, and an oil infiltration opening 62 communicating with the inside and outside is formed in the lower part of the peripheral wall 59a of the cover 59. The penetration opening 62 is located below the bottom wall 1a of the mission case 1.

(Operation) When the hydraulic pump 45 operates, the lubricating oil in the mission case 1 is covered by the pump 45 from the oil intrusion opening 62.
After being sucked into the support cylinder 59 and filtered by the filter element 55 fitted on the support cylinder 58, the holes 57 of the peripheral wall 58b of the support cylinder 58 are formed.
Is sucked into the support cylinder 58 from the discharge port 60, and is supplied to a required portion from the discharge port 60 for operation or lubrication.

At this time, even if the vehicle tilts back and forth greatly and the upper part of the cover 59 goes out from the lubricating oil surface OL to the outside, the opening 62 is formed in the lower part of the cover 59 and is constantly immersed in the oil, so the air is covered. It does not infiltrate 59. In particular, the oil entry opening 62
Is located below the bottom wall 1a of the mission case 1, so even if the vehicle is extremely tilted, the air will be covered.
Do not mix in 59.

Also, when cleaning or replacing the oil filter 50,
After the bottom cover 51 is separated from the bottom wall 1a of the mission case 1 together with the cover 59 or after being separated from the cover 59, the filter element 55 is removed.

(Embodiment) Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. In FIG. 1, reference numeral 1 is a mission case that constitutes a tractor vehicle body, and is mounted behind an engine (not shown).
A torque converter 2 includes a front cover 3 connected to the crankshaft of the engine, a rear cover 4 fixed to the front cover 3, a pump 5 mounted in the rear cover 4, and an output shaft via a turbine hub 6. Turbine 8 mounted on 7,
It comprises a stator 11 connected to a fixed cylinder shaft 10 via a one-way clutch 9 and a direct coupling clutch 12 for directly coupling the front cover 3 and the output shaft 7. Then, the engine rotates the pump 5 via the front and rear covers 3 and 4, and the centrifugal force causes the internal oil to flow through the turbine 8 and the stator 11, and the power from the turbine 8 to the output shaft 7 is transmitted. .

The output shaft 7 is rotatably fitted into a fixed wall 14 fixed to the partition wall 13 of the mission case 1 and is supported by a bearing 15.

Reference numeral 16 denotes a hydraulic clutch device, which includes a clutch case 18 rotatably fitted on a transmission shaft 17 rotatably fitted in the rear end of the output shaft 7, and an axial direction in the case 18. It has a forward clutch 19 and a reverse clutch 20 incorporated in the. Forward clutch 19 and reverse clutch 20 are piston 2
1,22, clutch plates 23,24, pressure receiving plates 25,26, driven bosses 27,2
8. It is composed of return springs 29, 30 and the like. The pressure receiving plate 25 of the forward clutch 19 is integrally formed at the rear end of the output shaft 7 and is spline-fitted to the clutch case 18, so that the driven boss can be driven.
27 is spline-fitted to the transmission shaft 17. A gear 31 is integrally formed at the rear end of the transmission shaft 47, and this gear 31 has
Gear 32 is engaged.

The driven boss 28 of the reverse clutch 20 is rotatably fitted onto the transmission shaft 17, and the gear 33 is integrally formed.
A gear 35 is engaged with 33 via a back gear 34. The gears 32, 35 are integrally formed on the transmission cylinder shaft 36,
The transmission cylinder shaft 36 is rotatably fitted over the transmission shaft 37 of the PTO system via the cylinder shaft 38.

A control valve 39 of the hydraulic clutch device 16 is attached to the fixed wall 14. When hydraulic oil is supplied from the control valve 39 to the forward clutch 19, the piston 21 presses the clutch plate 23 against the return spring 29, and the driven boss 27, the transmission shaft 17, and the gears 31, 32.
The power of the output shaft 7 is transmitted to the transmission cylinder shaft 36 via.

When hydraulic oil is supplied to the reverse clutch 20, the piston 22
Presses against the clutch plate 24 against the return spring 30, and the power of the output shaft 7 is driven by the driven gear 8 and the gears 33, 34, 35.
It is transmitted to 36, and it is possible to move forward and backward by these.

A pump housing 40 is formed in the lower portion of the fixed wall 14, and the pump housing 40 is penetrated by the front portion of the transmission shaft 37. The front portion of the transmission shaft 36 is a spline shaft portion 37a, and a gear 41 is fitted to the front end of the spline shaft portion 37a.
It is in mesh with the gear 43 of. The gear shaft 42 has a tubular shape and is rotatably fitted onto the fixed tubular shaft 10 and is connected to the rear cover 4 of the torque converter 2 at its front end.
Therefore, the power of the engine is transmitted to the transmission shaft 37 via the front and rear covers 3, 4 of the torque converter 2, the gear shaft 42, and the gears 41, 43. The gears 41 and 43 are housed in a gear case 44 mounted on the front surface of the fixed wall 14.

A hydraulic pump 45 is housed in the pump housing part 40, and the hydraulic pump 45 is located between the pump case 46 and the pump cover 47 mounted on the pump case 46, and the rotor 48 and the like that are visible on the spline shaft part 37 a of the transmission shaft 37. A trochoidal pump, which is driven by a transmission shaft 37.

Reference numeral 50 denotes an oil filter, which is provided below the partition wall 13 supporting the transmission shaft 37 and the like, on a bottom lid 51 mounted on the bottom wall 1a of the transmission case 1, and the hydraulic pump 45 serves as the oil filter 50. The lubricating oil in the mission case 1 is filtered and sucked through the flexible suction pipe 52.

The bottom lid 51 is a bottom wall of the mission case 1 as shown in FIG.
Bottom wall 1a with bolt 54 so as to cover opening 53 formed in 1a
It is removably attached to the bottom side.

The oil filter 50 includes a cylindrical filter element 55 and an oil filter body 56.
56 is a bottomed support cylinder 58 having a plurality of holes 57 in the peripheral wall 58b,
A cap-shaped cover integrally provided on the upper end of the support cylinder 58
59 and a discharge port portion 60 projecting upward at the center of the upper wall 59b of the cover. The filter element 55 may be of an accordion type in order to make the filtration surface larger. Then, a filter element is attached to the support cylinder 58.
The bottom portion 58a of the support cylinder 58 is detachably attached to the bottom lid 51 with the bolt 61 so that the cover 55 is detachably fitted and the cover 59 covers the element 55 from above.

The peripheral wall 59a of the cover 59 is extended to the vicinity of the bottom lid 51, and the peripheral wall 5a
An oil penetration opening 62 is formed between the lower end of 9a and the upper surface of the bottom lid 51. This opening 62 is lower than the upper surface of the bottom lid 1a,
Even if the vehicle body leans back and forth, it is always located below the oil level OL, and air does not enter. Therefore, for example, an opening
Compared to the case where 62 is above cover 59, the amount of lubricating oil is 2
It is possible to reduce by ~ 30%. An oil storage space 63 is formed between the peripheral wall 59a and the element 55.

A seal member 64 is externally fitted onto the upper portion of the discharge port portion 60, and the discharge port portion 60 is internally and removably fitted into an oil passage 65 formed on the lower surface of the partition wall 13 from below. The oil passage 65 communicates with the pipe 52.

When cleaning and replacing the oil filter 50, the bolt 54 is removed, the bottom cover 51 is removed downward from the lower wall 1a, and the discharge port 60 is connected to the oil passage 65.
Therefore, the oil filter 50 can be easily removed from the outside of the mission case 1. Then, the bolt 61 may be removed to separate the support cylinder 58 from the bottom lid 51, and the filter element 55 fitted onto it may be removed.

When mounting the oil filter 50, the procedure opposite to the above may be carried out, and the discharge port portion 60 can be pushed into the oil passage 65 from below and fitted therein.

Further, the oil filter main body 56 may be constructed by screwing a support cylinder 58 and a cover 59 as shown in FIG.

The present invention is not limited to the above embodiment, but can be modified in various ways. For example, a spigot portion is formed on the bottom lid 51, a lower portion of the cover 59 is fitted or screwed into the spigot portion, a lower portion of the cover 59 is perforated to form an opening 62, and a support cylinder 58 is formed on the cover 59. Without forming the discharge port portion 60, the sealing member 64 is provided on the upper surface of the discharge port portion 60, and the partition wall
The lower surface of 13 is formed flat, and the upper surface of the discharge port portion 60 is pressed against the flat surface via the seal member 64 to cover the cover 59.
The inside can be configured to communicate with the oil passage 65, or the suction pipe 52 can be directly connected to the discharge port portion 60.

(Effect of the Invention) In the oil filter device of the present invention, the opening 53 is formed in the bottom wall 1a of the mission case 1, and the bottom lid 51 that closes the opening 53 is formed.
Is detachably attached to the bottom wall 1a from the lower surface side, and a support cylinder 58 having a plurality of holes 57 in the peripheral wall 58b is erected on the upper surface of the bottom lid 51,
The tubular filter element 55 is externally fitted to the support cylinder 58,
A cover 59, which covers the filter element 55 from above and has a discharge port 60 in the upper portion, is provided at the upper end of the support cylinder 58, and an oil infiltration opening 62 communicating with the inside and outside is formed in the lower portion of the peripheral wall 59a of the cover 59. Since the oil entry opening 62 is located below the bottom wall 1a of the mission case 1, even if the vehicle tilts back and forth and the upper part of the cover 59 goes out from the lubricating oil surface OL to the outside, the lower part of the cover 59 is covered. The lubricating oil can be sucked into the cover 59 without mixing air from the oil infiltration opening 62, the occurrence of cavitation can be prevented, and the amount of the lubricating oil can be reduced. In particular, since the oil entry opening 62 is located below the bottom wall 1a of the mission case 1,
Even when the vehicle is extremely tilted, it is possible to prevent air from entering the cover 59.

In addition, the lubricating oil accumulated between the cover 59 and the tubular filter element 55 is filtered by the filter element 55 externally fitted to the support tube 58, and then supported from the plurality of holes 57 in the peripheral wall 58b of the support tube 58. Since it is sucked into the cylinder 58, the filtering surface of the filter element 55 can be made large, the filter element 55 can be made compact, and even if the lower part of the filter element 55 becomes clogged, Then, the lubricating oil can be filtered at the upper part of the filter element 55 which is less likely to be clogged.

Further, the oil filter 50 can be easily removed or attached from the outside of the mission case 1, and the maintenance of the oil filter 50 can be easily performed.

[Brief description of drawings]

The drawings illustrate an embodiment of the present invention. FIG. 1 is a sectional view of the whole, FIG. 2 is a sectional view of an oil filter, and FIG. 3 is a sectional view of an oil filter. 1 ... mission case, 1a ... bottom wall, 45 ... hydraulic pump, 50 ... oil filter, 51 ... bottom cover, 53 ... opening, 55 ... filter element, 59 ... cover, 60 ...
Discharge port, 62 ... Oil entry opening, OL ... Lubricating oil surface.

Claims (1)

[Scope of utility model registration request] 1. An oil filter (50) is provided at the bottom of the mission case (1), and a discharge port (6) of this oil filter (50) is provided.
(0) is connected to a hydraulic pump (45) in a vehicle oil filter device, wherein an opening (53) is formed in the bottom wall (1a) of the mission case (1), and a bottom lid that closes the opening (53). (51) is detachably attached to the bottom wall (1a) from the lower surface side, and a support cylinder (58) having a plurality of holes (57) in the peripheral wall (58b) is erected on the upper surface of the bottom lid (51), A tubular filter element (55) is externally fitted to the support cylinder (58), and the cover (59) having the discharge port (60) on the upper part of the filter element (55) and the upper part of the support tube is attached to the support cylinder.
An oil entry opening (62) is formed at the upper end of the (58) and communicates with the inside and outside at the lower part of the peripheral wall (59a) of the cover (59), and the oil entry opening (62) is formed in the mission case (1). (1) is located below the bottom wall (1a) of the vehicle.