JPH0893891A - Working oil supply device in transmission for vehicle - Google Patents

Abstract

PURPOSE: To improve a cooling effect of working oil by way of adopting an oil filter of large capacity by externally arranging an oil filter interposed in a supply conduit run of working oil to a hydraulic device directed longitudinally at an intermediate portion in the vertical direction on a lateral one side part of a transmission case. CONSTITUTION: An oil filter 18 is externally arranged on an intermediate portion in the vertical direction of a lateral one side part of a transmission case 10 directed longitudinally in a device supplying working oil in the transmission case 10 to a hydraulic device 17 by a working oil conduit run including the oil filter 18. This oil filter 18 is constituted so as to provide its working oil output port part 18a and a working oil input port part 18b on front and back end surface parts. The input port part 18b and the inside of the transmission case 10 are connected to each other by a lower part suction pipe 33, and the output port part 18a and the hydraulic device 17 are connected to each other by an upper part suction pipe 34, free to disconnect.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic oil supply device for a vehicle transmission.

[0002]

2. Description of the Related Art Lubricating oil in a mission case is commonly used as hydraulic oil for a hydraulic system, and the hydraulic oil is supplied to an HST or other hydraulic system through a hydraulic oil line including an exterior oil filter. Such a vehicle transmission is known (see, for example, Japanese Utility Model Publication No. 63-3850).

[0003]

In the conventional type of this kind, the hydraulic oil intake port and the exhaust port of the oil filter incorporated in the hydraulic oil pipe line are close to each other, and the intake port and the exhaust port are connected for communication. Since the oil passages to be formed have to be concentrated and locally provided on the mission case wall, there is a problem that the formation of such oil passages is not easy and the durability is poor. Was installed horizontally in a narrow space such as between running wheels in the transverse direction of the vehicle, it was not possible to use a large capacity and the effect of cooling the operating oil in the oil filter part was not so great. There was a problem that we could not expect it, and we also had a hard time maintaining the oil filter. Further, in the conventional structure, most of the hydraulic oil pipe line is located in the exposed and close position to the operating part of the working machine or the like mounted on the vehicle, and therefore, there is a problem that a damage accident is likely to occur. It was

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art. The object of the present invention is to connect the hydraulic oil inlet and outlet of an oil filter. It is easy to form an oil passage that has a large capacity, and while it is possible to conveniently cool the operating oil using a large-capacity oil filter, it is easy to maintain the operating oil pipeline that includes the oil filter. To provide an improved hydraulic oil supply device for a vehicle transmission, and an improved hydraulic oil for a vehicle transmission so as not to be damaged by an operating part such as a working machine mounted on the vehicle. A supply device is provided.

[0005]

In the device of the present invention, the oil filter (18) for interposing the hydraulic oil to the hydraulic device (17) in the supply pipe line is provided on one lateral side of the transmission case (10). Since the exterior is installed in the front-rear direction in the middle part of the vertical direction of the vehicle, it is possible to increase the capacity of the oil filter unlike the conventional one in which the oil filter is provided laterally to the traveling direction of the vehicle. Also, by using an oil filter having a large capacity, the cooling effect of the hydraulic oil can be increased. Further, since the hydraulic oil intake port (18a) and the hydraulic oil intake port (18b) are separately installed on the front and rear end surfaces of the oil filter, the oil passages connecting them are centrally formed. The oil passage can be easily formed because it is unnecessary, and the oil passage portion has good durability because the oil passage is not locally concentrated.

Furthermore, in addition to the oil filter (18) being installed in the front-rear direction, the hydraulic oil outlets (1) provided in the front and rear end surfaces of the oil filter (18) in a distributed manner.
8a) and the intake portion (18b), the hydraulic oil intake portion
A lower suction pipe (33) connecting the (18b) and the lower interior of the mission case (10) for communication is detachably connected to the mission case (10) and the oil filter (18), and Hydraulic oil outlet (18a) and hydraulic device (1
7) Connect the upper suction pipe (34) for communication with
Since it is detachably connected to the oil filter (18) and the hydraulic device (17), the upper suction pipe
(34) and oil filter (18), oil filter
(18) and the lower suction pipe (33) combined and connected in the same way, or the upper suction pipe
(34), attachment and detachment of the lower suction pipe (33) alone,
It can be performed relatively easily by the pulling out action to the front or the rear, which is convenient for maintenance.

In the hydraulic oil supply device according to the second aspect of the invention, the exterior type oil filter (18) provided in the hydraulic oil conduit is provided at a portion facing the inner side surface (37a) of the boarding operation part (37) of the vehicle. Located, the hydraulic oil outlet of the oil filter (18)
Since the upper suction pipe (34) connecting the (18b) and the hydraulic device (17) for communication is constructed for the combine located on the front side of the transmission case (10), the oil filter (18) ) And a small portion of the hydraulic oil pipe connected to it) are almost never damaged because they only face the cutting and conveying section which is a working machine, and the oil filter (18) for maintenance is not damaged. The attachment / detachment can be easily performed from the boarding operation unit (37).

[0008]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a partially cutaway front view showing the internal structure of a transmission to which the device of the present invention is applied, and FIG. FIG. 3 is a rear view of a transmission in which the device of the present invention is implemented, FIG. 4 is a left side view of the same, and FIG. 5 is a schematic plan view of a vehicle in which the transmission of the present invention is incorporated. Is.

First, an example of a transmission embodying the present invention will be described with reference to FIGS. 1 and 3. The illustrated transmission is a continuously variable transmission continuously connected to a lateral portion above the transmission case (10). Equipment (HST / 11)
And a gear type steering transmission unit (12) built in the lower inside of the mission case (10).
Then, the transmission mechanism (14) is constructed by wrapping a belt around the input pulley (13) fitted to the input shaft of the continuously variable transmission (11) and the output pulley of the engine to be described later. Rotational power in the forward or reverse direction, which is input to the continuously variable transmission (11) and set to be changed by the continuously variable transmission, is transmitted from the output shaft (15) of the continuously variable transmission through the chain transmission mechanism (16) to the above-mentioned operation. It is configured to be transmitted to the direction transmission unit (12).

A hydraulic device (a hydraulic pump with a rotary valve) for raising and lowering a working machine mounted on a vehicle is provided at a side portion of the continuously variable transmission opposite to the input pulley (13). 17) is attached, and the hydraulic device (17) is a continuously variable transmission.
It is directly connected to the input shaft of (11) and is always driven at constant rotation. The hydraulic device (17) shares the lubricating oil in the mission case (10) as working oil,
The hydraulic oil is configured to be supplied and discharged by a hydraulic oil line including the oil filter (18) according to the present invention. The details of the hydraulic oil pipeline including the oil filter will be described later.

The above-mentioned mission case (10) is a case body formed by joining the left and right case halves (10a) (10a) facing each other to form a case body. It is formed by attaching the left and right axle support cylinders (19) (19) to the side portions. The input sprocket (20) into which the output shaft (15) of the continuously variable transmission (11) is inserted and wedged is rotatably mounted on the upper portion of the transmission case (10) via a pair of left and right bearings. The chain is supported, and a chain is hung between the input sprocket (20) and the passive sprocket (21) of the steering transmission unit (12) to form the chain transmission mechanism (16).

Next, the steering transmission section (12) will be described. The left and right axles (22) and (22) are rotatably supported by a pair of left and right axle support cylinders (19) and (19), respectively. The inner shaft end of (22) extends inside the mission case (10). A pair of left and right passive shafts (23) and (23) coaxial with the axles (22) and (22) are disposed between the inner shaft ends of the axles (22) and (22). Passive axis
The outer shaft end of (23) and the inner shaft end of the axle (22) are interlockingly connected via a planetary gear reduction mechanism (24).

Then, the left and right planetary gear reduction mechanisms (24)
The steering transmission section (12) is incorporated in a portion between (24), and the steering transmission section (12) includes a pair of left and right side clutches and a steering brake as follows. It is configured. The passive sprocket (21) described above is the case half.
(10a) Holder (2 formed integrally with (10a)
5) The bearing 25 is rotatably supported by (25), and a plurality of ball engaging grooves extending in the axial direction are formed in the inner hole of the passive sprocket (21).

On the other hand, in the inner cavity of the passive sprocket (21), a ball support (26) which is wedge-supported across the left and right passive shafts (23) (23) is arranged. -Le support (2
A pair of left and right ball support holes is formed in the outer peripheral ring portion of 6), and the balls (27) (27) ...
The group is supported so as to be capable of projecting outward in the radial direction. Then, the clutch sliders (28) and (28) slidably fitted to the left and right passive shafts (23) and (23) are moved to the inner end side of the passive shaft, whereby the ball ( 27) (27) ...
The group is pushed up to engage with the ball engaging groove of the passive sprocket (21) separately on the right and left sides. When the ball (27) ... sprocket
(21) and the ball support (26) are interlockingly connected with each other through a ball so that the power of the passive sprocket (21) is left and right.
(23) It is configured to be transmitted separately to (23).

The left and right clutch sliders 28, 28 are
Each of the clutch sliders is designed to be elastically biased inward by a coil spring so that the balls (27) are kept in engagement with the ball engaging groove.
When (28) is moved outward by the shift hoke (29) against the coil spring, the balls (27), ... Is disengaged from the passive axis
The transmission to (23) is designed to be blocked separately for left and right. 1 and 2, the left side of the drawings shows the disengaged state of the side clutch, and the right side shows the connected state.

Then, the left and right shift hawks (29) (29)
Actuating arms (30) (3
0), and the operating arms (30), (30) of which are provided in the driving section of the vehicle through the operating cable.
The clutch sliders (28, 28) are connected to (not shown) so that the clutch sliders (28, 28) can be slid by the left and right operations of the operation lever.

The left and right clutch sliders (28) (2
8) and the left and right planetary gear reduction mechanisms (24) (24)
Wet multi-plate steering brake (31)
(31) is provided, and each steering brake (31) is
When the clutch slider (28) is slid beyond the clutch disengaged position by the operation of the operation lever and further slid to the outside of the set dimension, the braking plate is pressed against the side surface of the ring gear of the planetary gear reduction mechanism (24). The passive shaft (23) is braked so as not to rotate, and conversely, when the clutch slider (28) is returned to the clutch disengaged position or the same position or higher, the stop of the passive shaft (23) is released. Has been done.

In this way, the required amount of lubricating oil which also serves as hydraulic oil is stored inside the mission case (10) in which the steering transmission unit (12) and the chain transmission mechanism (16) are housed. The hydraulic oil passes through the supply path of the hydraulic oil pipe described above, and the hydraulic device
The drain oil supplied from the hydraulic device (17) is returned to the transmission case (10) through the drain passage (32) of the hydraulic oil pipe.

The supply path of the hydraulic oil pipe will be described with reference to FIGS. 3 and 4. An oil filter (18) is placed in the front-rear direction at an intermediate position in the vertical direction on one lateral side of the mission case (10). The oil filter (18) is provided with a hydraulic oil intake port (18a) and a hydraulic oil intake port (18b) on the front and rear end faces of the oil filter (18). Then, the hydraulic oil intake portion (18b) and the lower interior of the mission case (10) are connected by a lower suction pipe (33), and the lower suction pipe (33) is connected to the oil filter (18).
It is detachably attached to the mission case (10).

Further, the upper suction pipe (3) is provided between the hydraulic device (17) and the hydraulic oil outlet (18a) located on the opposite side in the front-rear direction with respect to the hydraulic oil inlet (18b).
The upper suction pipe (34) is detachably attached to the oil filter (18) and the hydraulic device (17). In addition, the drain route (3
The end portion (32a) of 2) is the lower suction pipe (33).
Upper half of the suction port (33a) of the
It is connected to the inside of the mission case (10) by being connected to (10a) using a hole opened for another purpose.

FIG. 5 shows an embodiment in which the transmission provided with the hydraulic oil supply device configured as described above is configured for a combine, which is one of the vehicles. The combine of FIG. 5 includes a pair of left and right crawler traveling devices (35) (3
Above the vehicle body (36) provided with 5), various devices such as the boarding operation unit (37), the engine (38), and the threshing device are arranged. Mowing and transporting device on the part
(39) is configured to be able to move up and down. And
Left and right axles (22) of the transmission according to the device of the present invention
The drive wheels (40) (40) fitted to (22) drive the crawler traveling devices (35) (35) in rotation to travel, and the power of the engine (38) drives the harvesting and conveying device ( 39) and a series of working devices such as a threshing device are used to perform harvesting work. The transmission is installed in a combine and the external oil filter (18) described above is used for boarding. Inner surface (3) of the driving part (37)
7a), and the oil filter
An upper suction pipe (34) which connects the hydraulic oil outlet (18b) of (18) and the hydraulic device (17) to each other is located on the front side of the mission case (10).

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a transmission to which the device of the present invention is applied.

FIG. 2 is an enlarged cross-sectional view of a main part of a part of the transmission shown in FIG.

FIG. 3 is a rear view of a transmission in which the device of the present invention is implemented.

FIG. 4 is a left side view of the transmission of FIG.

FIG. 5 is a schematic plan view of a vehicle in which a transmission according to the present invention is incorporated.

[Explanation of symbols]

 10 mission case 17 hydraulic device 18 oil filter 18a hydraulic oil outlet 18b hydraulic oil inlet 33 lower suction pipe 34 upper suction pipe 37 boarding operation part 3a inner surface of boarding operation part

Claims (2)

[Claims] 1. The lubricating oil in the transmission case (10) is shared with the hydraulic oil of the hydraulic device (17), and the hydraulic oil is supplied to the hydraulic device by a hydraulic oil line including an oil filter (18).
In the vehicle transmission adapted to supply to (17), the oil filter (18) is externally arranged in the front-rear direction at an intermediate position in the vertical direction on one lateral side of the transmission case (10), At the front and rear end faces of the oil filter (18), there are a hydraulic oil intake port (18a) and a hydraulic oil intake port (18a).
b) is installed separately, and the lower suction pipe (33) which connects the hydraulic oil intake (18b) and the lower inside of the mission case (10) is connected to the mission case (10) and the oil. The upper suction pipe (34), which is detachably connected to the filter (18) and connects the hydraulic oil outlet (18a) and the hydraulic device (17) in communication, is connected to the oil filter (18) and the hydraulic pressure. A hydraulic oil supply device for a vehicle transmission, which is detachably connected to the device (17). 2. A transmission equipped with a hydraulic oil conduit for supplying lubricating oil in a transmission case (10) to a hydraulic device (17) as hydraulic oil, which is incorporated in a combine and is provided in the hydraulic oil conduit. The exterior type oil filter (18) is disposed at a position facing the inner side surface (37a) of the boarding operation part (37), and the hydraulic oil outlet (18b) of the oil filter (18) and the hydraulic device ( The upper suction pipe (34) for communicating with 17) is connected to the mission case (10).
The hydraulic oil supply device for a vehicle transmission according to claim 1, wherein the hydraulic oil supply device is located on the front side of the vehicle.