JPH0721959Y2 - 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 such as a tractor.

(Prior Art) For example, in a tractor or the like, an oil filter is provided at the bottom of the transmission case, and the lubricating oil in the transmission case is sucked in from the oil filter by a hydraulic pump and supplied as hydraulic oil to a hydraulic clutch or the like. There is. Then, when the tractor is tilted, air is sucked into the oil filter so that cavitation does not occur.
As shown in FIG. 10, there is an oil filter 101 in which a cylindrical filter element 102 is covered with a cylindrical cover 103 and oil is sucked from the entire circumference of the lower end side of the cover 103. Further, it is effective to prevent the cavitation from disposing the oil filter 101 at the center of the bottom of the mission case, but it is provided at a distance from the center of the bottom of the mission case due to the restrictions of the parts in the mission case. ing.

(Problems to be solved by the invention) In the above-mentioned conventional one, when the tractor is often used on a sloping ground, the tractor may be inclined to the limit.
When the side on which the oil filter 101 is provided is in the low position, as shown in FIG. 11, the oil filter 101 is
There is no problem because it will be fully immersed in the oil of the mission case, but the side where the oil filter 101 is installed is the first
As shown in FIG. 2, when tilted to a high position, the oil filter 101 is open around the entire lower end side of the cover 103, so that the oil filter 101 is positioned toward the center of the mission case bottom. There is a risk that the other side will be exposed from the oil surface OL of the lubricating oil. Therefore, an object of the present invention is to provide an oil filter device for a vehicle that more reliably prevents the occurrence of cavitation.

(Means for Solving the Problem) The technical means taken by the present invention to achieve the above-mentioned object is that the oil is provided in the bottom of the mission case 3 having oil inside, with a space from the center A of the bottom. Provide a filter 49,
In the oil filter device of the vehicle configured by covering the filter element 52 with the cover 53 having the oil infiltration opening 64 formed in the lower portion of the oil filter 49, the oil infiltration opening 64 is formed at the center of the transmission case bottom of the oil filter 49. It is formed on the side facing A, and the oil infiltration opening 64
Other than that, the lower part of the cover 53 is closed.

(Operation) The tractor 1 is extremely inclined on a sloping ground and the oil filter 49
Even if the side opposite to the center A of the mission case bottom is exposed from the oil surface of the lubricating oil to its lower end, the oil infiltration opening 64 of the oil filter 49 is located on the side toward the center A of the mission case bottom and sucks air. There is nothing to do.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. First
In FIG. 5 and FIG. 5, 1 is a tractor, which is an engine 2,
The vehicle body is mainly composed of the mission case 3 and the like. A torque converter 4 is arranged in the front part of the transmission case 3, and the torque converter 4 is connected to the crankshaft of the engine 2, a rear cover 6 fixed to the front cover 5, and a rear cover 6. A pump 7 mounted inside, a turbine 10 attached to an output shaft 9 via a turbine hub 8, a stator 13 connected to a fixed cylinder shaft 12 via a one-way clutch 11, a front cover 5 and an output shaft. It comprises a direct coupling clutch 14 for directly coupling with 9.

The direct coupling clutch 14 is arranged between the front cover 5 and the turbine 10, and has an annular piston 15 slidably fitted on the rear surface of the front cover 5 and rotatably fitted to the output shaft 9, and the annular piston 15. A drive plate mounted on the piston 15 via a buffer mechanism 16 and integrally rotatably connected to the turbine hub 8.
With 17 and. The torque converter 4 is supplied with hydraulic oil from a switching valve (not shown). When the torque converter 4 operates, the front cover 5 and the annular piston 5 are operated.
Directly connect the clutch 14 to the front and rear covers
When the above operation is performed, the hydraulic oil is directly supplied into the front and rear covers 5 and 6, respectively.

The output shaft 9 is rotatably fitted and supported by a support wall 19 which is detachably fixed to a partition wall 18 of the mission case 3. The fixed cylindrical shaft 12 is attached to the support wall 19 while being fitted onto the output shaft 9. A hydraulic clutch device is provided at the rear end of the output shaft 9.
20 are arranged.

The hydraulic clutch device 20 is configured by incorporating a forward clutch 23 and a reverse clutch 24 in a transmission shaft center direction in a clutch case 22 rotatably fitted on a transmission shaft 21. The control valve 25 of the hydraulic clutch device 20 is mounted on the support wall 19. When hydraulic oil is supplied from the control valve 25 to the forward clutch 23, the piston 26 press-contacts the clutch plate 28 against the return spring 27, and the driven boss 29, the transmission shaft 21, and the gears 30,3.
When the power of the output shaft 9 is transmitted to the input side of the traveling system transmission via 1 and hydraulic oil is supplied to the reverse clutch 24, the piston 32 presses the clutch plate 34 against the return spring 33 and the driven boss. Output shaft 9 through 35, transmission shaft 21 and gears 36, 37, 38
Is transmitted to the input side of the traveling system transmission to allow forward and backward movement.

A pump housing 39 is formed in the lower part of the support wall 19, and a front portion of the propulsion shaft 40 penetrates the pump housing 39. A gear 41 is spline-fitted to the front end of the propulsion shaft 40, a gear 42 is engaged with the gear 41, and the gear 42 is connected to the rear cover 6 of the torque converter 4 via a cylinder shaft portion 43.
The power of the engine 2 is transmitted to the propulsion shaft 40. The gears 41 and 42 are housed in a gear case 44 attached to the front surface of the support wall 19.

A hydraulic pump 45 that supplies the torque converter 4 or the hydraulic clutch device 20 with the lubricating oil in the mission case 3 as hydraulic oil is accommodated in the pump housing portion 39, and the hydraulic pump 45 is attached to the pump case 46 and this. Pump cover
It is a tocolloid pump including a rotor 48 and the like, which is spline-fitted to the tip of the propulsion shaft 40, and is driven by the propulsion shaft 40.

An oil filter 49 is provided below the partition wall 18. This oil filter 49, as shown in FIG.
It is arranged at a distance diagonally forward to the right from the center A (the center in the front-rear direction and the center in the left-right direction) of the bottom wall 50 of the mission case 3. The oil filter 49 is shown in FIG.
As shown in FIGS. 3 and 4, the filter element 52 comprises a cylindrical filter element 52 and a cover 53, and the filter element 52 is externally fitted to an inner cylinder 54 having a large number of holes 55.

The cover 53 covers the filter element 52 and has a downward opening outer cylinder 56, a bottomed cylindrical support cylinder 57 located in the center of the outer cylinder 56 and having a large number of holes 58, and an outer cylinder 56. Upper wall 56a
And a discharge port portion 59 projecting upward from the central portion thereof. The bottom 57a of the support cylinder 57 is attached to the mounting plate 61 with bolts 6
2. Attached via a nut 63, the attachment plate 61 is detachably attached to the lower surface of the bottom wall 50 from below so as to close the opening 60 formed in the bottom wall 50 of the mission case 3.

A disc-shaped end plate 65 is mounted on the lower surface side of the outer cylinder 56, and a sealing material 66 is provided between the end plate 65 and the mounting plate 61.
And the central portions of the end plate 65 and the seal material 66 are open. Further, the side of the lower portion of the outer cylinder 56 facing the center A of the bottom wall of the mission case 3 is notched obliquely upward to the outside, and an oil infiltration opening 64 is formed.

The discharge port 59 is connected to one end of an oil passage 70 formed at the lower end of the partition wall 18, and the other end of the oil passage 70 is connected to the suction side of the hydraulic pump 45 via a suction pipe 71.

A drain hole 68 communicating with a space 67 between the inner cylinder 54 and the support cylinder 57 is formed in the mounting plate 61, and the drain hole 68 is closed by a drain plug 69.

As shown in FIG. 7, in the upper rear portion of the bonnet 72 that covers the engine 2, the radiator, the fuel tank, and the like, an instrument panel 73, a shuttle lever 74 for switching the hydraulic clutch device 20 between forward and backward movements, and a hand accelerator lever. 75 and a handle 76 are provided. At the tip of the shuttle lever 74, there is provided a lockup switch 77 for operating the direct coupling clutch 14 to lock up (directly couple the cover 5 and the output shaft 9). This switch 77
When the shuttle lever 74 is operated to the forward side, it is self-held by being pushed in and locked up after 2 seconds, and the lockup is released by pushing the switch 77 again. The lock-up is released by returning the shuttle lever 74 to the neutral position or operating it in the reverse direction, or by turning off the dump switch provided elsewhere.

A main transmission lever 78 and an auxiliary transmission lever 79 are provided so as to project from the upper surface of the mission case 3. The main shift is a four-speed shift, and as shown in FIG. 8, an interface for preventing double meshing of gears is provided between the pair of left and right shift rods 80 selectively shifted by the main shift lever 78. A lock piece 81 is interposed, and a plunger 83 of a safety switch 82 is provided at the center of the interlock piece 81 in the left-right direction.
Is formed with a peripheral groove 84. Plunger 83
Is urged by the spring in the protruding direction, and when the left and right shift rods 80 are in the neutral position due to the urging force,
Plunger 83 engages with circumferential groove 84 to interlock piece 81.
Is returned to the intermediate position, and at that time, the safety switch 82 is turned on, and the engine 2 can be started.

(Effect of the Invention) According to the present invention, the oil infiltration opening 64 of the oil filter 49 is formed on the side toward the center A of the transmission case bottom, and the lower part of the cover 53 other than the oil infiltration opening 64 is closed. Therefore, on a sloping ground, the vehicle 1 is extremely inclined so that the side where the oil filter 49 is provided is high, and the side opposite to the side toward the center A of the mission case bottom of the oil filter 49 is from the oil level of the lubricating oil to its lower end. Even if it is exposed, air is not sucked in, and cavitation can be prevented more reliably than in the conventional case.

[Brief description of drawings]

1 to 9 show an embodiment of the present invention.
The figure is a side sectional view of the front part of the transmission case, FIG. 2 is a side sectional view of the oil filter, FIG. 3 is a plan view thereof, FIG. 4 is a front view thereof, and FIG. 5 is a side view of a tractor. Is a layout view of the oil filter, FIG. 7 is a rear view of a rear upper portion of the hood, FIG. 8 is an explanatory view showing a shift type of the shift lever, and FIG.
FIG. 10 is a schematic view showing the structure of the end portion of the shift rod, FIG. 10 is a side sectional view showing a conventional example, and FIGS. 11 and 12 are side sectional views of a mission case for explaining conventional problems. . 1 ... tractor, 3 ... mission case, 49 ... oil filter, 50 ... bottom wall, 56 ... outer cylinder, 64 ... oil entry opening, A ... mission case bottom center.

Claims (1)

[Scope of utility model registration request] 1. An oil filter (49) is provided at a bottom portion of a transmission case (3) having oil therein at a distance from a center (A) of the bottom portion, and the oil filter (49) is provided at a lower portion. In a vehicle oil filter device constituted by covering a filter element (52) with a cover (53) having an oil infiltration opening (64), the oil infiltration opening (64) is provided in a transmission case of an oil filter (49). An oil filter device for a vehicle, characterized in that it is formed on the side toward the center (A) of the bottom, and the lower part of the cover (53) other than the oil infiltration opening (64) is closed.