JPH0328524A - Hydraulic clutch unit - Google Patents

Abstract

PURPOSE:To meet the specification of each model by spline-fitting a spline in the inner periphery side of a second clutch plate to a spline on the outer periphery surface of an intermediate transmission cylinder and also spline-fitting a spline on the inner periphery surface of the intermediate transmission cylinder to a spline on the outer periphery surface of a shaft. CONSTITUTION:A spline formed in the inner periphery side of a second clutch plate is spline-fitted to a spline formed in the outer periphery surface of an intermediate transmission cylinder 59 supported relatively and rotatably on one shaft 44 side. A spline 61 formed on the inner periphery surface if the intermediate transmission cylinder 59 is spline-fitted to a spline 40 formed on the outer periphery surface of the other shaft 17. Thus, the intermediate transmission cylinder is altered to meet the specification of each model easily and to commonly used the other parts.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a hydraulic clutch device. (Conventional technique pF!) Conventionally, when transmitting power from the counter shaft to the output shaft in the main transmission of a tractor, a mechanical forward/reverse switching device was used to freely transmit power forward or reverse by switching the shifter. There is something. There is also a hydraulic type forward/reverse switching device that uses hydraulic power to connect and disconnect power, instead of using the mechanical switching operation by Schick.

(Problem to be Solved by the Invention) However, when hydraulically converting a mechanical forward/reverse switching device, the inner diameter of the piston of the hydraulic clutch and the outer diameter of the return spring for returning the piston to a predetermined position may cause the inner circumference of the clutch plate to Since the spline size is determined, there is a drawback that it is difficult to use both mechanical and hydraulic parts. Additionally, the size of the gears differed depending on the large or small model, making it difficult to use them for other models. SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a hydraulic clutch device that can be easily adapted to various models and whose parts can be used interchangeably. (Means for Solving the Problem) The technical means includes a first shaft 17 and a second shaft 44 that are rotatably supported on the same axis, and a clutch is mounted on one shaft 44 in a relatively non-rotatable manner. A case 53 is provided, a plurality of first clutch plates are provided in the outer support cylinder portion 54 of the clutch case 53 in a relatively non-rotatable manner, and a plurality of second clutch plates are connected in a relatively non-rotatable manner to the other shaft 17!1. are provided alternately with the first clutch plates, and in one example, a receiving plate 5 is provided on the outer support cylinder portion 54.
5 is held in place so as not to come off, and the first clutch plate and the second clutch plate are pressed in the axial direction by the piston 65 from the other side,
In the hydraulic clutch 50 device that connects and disconnects power transmission between the first shaft 17 and the second shaft 44 by releasing the same, each second shaft
An intermediate transmission cylinder 5 in which a spline portion provided on the inner peripheral side of the clutch plate is relatively rotatably supported on the one shaft 44 side.
The spline portion 6I provided on the inner circumferential surface of the intermediate transmission cylinder 59 is spline-fitted into the spline portion 60 provided on the outer circumferential surface of the other shaft 17. It is at the point where it is being done. (Function) According to the present invention, when transmitting power between the first shaft 17 and the second shaft 44, the intermediate transmission cylinder 59, which is spline-fitted from the first shaft 17 to the outer peripheral surface of the first shaft 17, and the intermediate transmission cylinder 59 A second clutch plate spline-fitted to the outer circular surface, a first clutch plate,
This method transmits power to the second shaft 44 through the clutch case 53 sequentially, and by changing the diameter of the inner peripheral surface side spline portion 6l of the intermediate transmission cylinder 59, the first shaft I7 and other parts of the hydraulic clutch 50 are transmitted. Can be used for both purposes.

In addition, a clutch case 53 and a piston 65 are located on the second shaft 44 side.
, with the first clutch plate, second clutch plate, intermediate transmission cylinder 59, etc. assembled in advance, the spline portion 6l on the inner peripheral surface of the intermediate transmission cylinder 59 is connected to the spline portion 40 on the outer peripheral surface of the first shaft 17.
Assembling can be done simply by spline-fitting. (Example) Hereinafter, an example of the present invention will be described based on the drawings.
In the figure, 1 is a transmission case of a tractor, which has a clutch housing 2 integrally in the front part. 3 is a main clutch, which is built into the clutch housing 2, and a clutch release mechanism 4 connects and disconnects engine power. Reference numeral 5 denotes a propulsion shaft for running, which has a sleeve-like structure and is supported by bearings 7 on front and rear partition walls 6. Reference numeral 8 denotes a PTO propulsion shaft, which is directly connected to the engine side, inserted into the traveling propulsion shaft 5, and connected to the PTO via a PTO clutch mechanism (not shown).
It is linked to the transmission. 9 is a driving system mission, with elevation switching device 1o and 1st
It consists of a main transmission 11 for speeds to 3rd speeds (4th to 6th speeds), a forward/reverse switching device 12, etc., and is built into the mission case 1. Reference numeral 13 denotes a speed change shaft, whose front part is supported by a bearing 14 at the rear end of the traveling propulsion shaft 5, and whose rear part is supported by a bearing 15 on the wall 16 of the mission case 1, and is arranged on the extension of the axis of the propulsion shaft 5. There is. 17 is a counter shaft as a first shaft, the front part is supported by the wall 6 with a bearing 18, and the rear part is supported by a bearing 19 passing through the wall 16.
are supported by a wall l6 and are parallel to each other below the transmission axis l3. The height switching device i1F10 includes a gear 20 formed on the traveling propulsion shaft 5 and a gear 21 that engages with the gear 20 on the counter shaft 17, and further has a gear 21 on the speed change shaft 13 that engages with the gear 22 on the counter shaft 17. In addition, a shifter 24 for switching between heights is provided so as to be slidable in the directions of arrows H and L.

The main transmission yl11 has a transmission gear 2 having a different diameter on a transmission shaft 13.
5 to 27 are fixedly installed, and gears 28 to 30 that mesh with the transmission gears 25 to 27 are rotatably fitted onto the counter shaft 17. A shifter 31 that can be switched freely is provided between the gears 29 and 30, and a shifter 32 that can be switched freely in the IF and 2F directions shown by the arrows is provided. The forward/reverse switching device 12 is disposed behind the main transmission 11 and supports a transmission shaft 35 equipped with gears 33 and 34 at both ends of the transmission shaft 13 with a bearing 36, and supports a transmission shaft 35 with a bearing 37 against a wall 38.
Support on the side. The gear 33 is engaged with a gear 4l that is spline-fitted to a spline portion 40 provided on the outer peripheral surface of the rear end of the counter shaft 17.
A gear 45 on an output shaft 43 as a second shaft, which is supported by a bearing 42 on the wall 38 and supported by a bearing 43 on the wall 38, is engaged with a gear 45 via an idle gear 46. Further, the gear 45 is provided with a bearing 47 consisting of a pair of front and rear ball bearings.
．． 48, the gear 45 is rotatably supported on the output shaft 44 side, and both bearings 47 and 48 restrict movement of the gear 45 in the axial direction, so that it receives radial force and thrust force. Therefore, compared to systems that use needle bearings, thrust collars, etc., less precision is required in the end face polishing and inner diameter polishing of the gear 45, making lowering easier, providing stable quality, and reducing the number of parts. This can be reduced.

The counter shaft 17 and the output shaft 44 are rotatably supported on the same axis, and a hydraulic clutch 50 is installed between the ends of both shafts 17 and 44 to connect and disconnect power transmission. The hydraulic clutch 50 is a multi-disc wet clutch, and includes a forward clutch 51 on the front side and a reverse clutch 52 on the rear side, and a common clutch case 53 is provided on the output shaft 44 so as to be non-rotatable. A plurality of first clutch plates (not shown) are provided in front and rear of the outer support cylinder portion 54 of the clutch case 53 in a manner that is non-rotatable relative to each other.
A second clutch Fi (not shown) is provided alternately with the first clutch plate so as to be rotatable relative to the first clutch plate, and includes a receiving plate 55 and a retaining ring 56.
It is held in place to prevent it from coming off.

The spline portion provided on the inner peripheral side of each second crunch plate of the forward clutch 5l is supported on the output shaft 44 side, that is, on the inner support cylinder portion 57 of the clutch case 53, through a bearing 58 made of a ball bearing, so as to be relatively rotatable. intermediate transmission cylinder 59
It is spline-fitted to a spline portion 60 provided on the outer circumferential surface of. Further, a spline portion 61 provided at the front end of the inner peripheral surface of the intermediate transmission cylinder 59 is spline-fitted to the spline portion 40 of the counter shaft 17 . A spline portion provided on the temporary inner circumferential side of each second clutch of the reverse clutch 52 is spline-fitted to a spline portion 63 formed on the outer circumferential surface of a support cylinder portion 62 protruding from the gear 45. ．． On both sides of the intermediate partition wall 64 of the clutch case 53, pistons 65 and 66 which are slidable in the front and rear direction are provided respectively, and a control valve is connected to the cylinder chamber between the pistons 65 and 66 and the intermediate partition wall 64 from a hydraulic bomb. The pistons 65 and 66 are actuated by supplying pressure oil through the pistons 65 and 66, and are forced to releasably press the first clutch plate and the second clutch plate toward the receiving plate 55 to disconnect and connect power transmission. ing. 67 is a return spring, which functions to return the pistons 65, 66 to the release position. When the forward clutch 5l is connected, the counter shaft 1
7, the output shaft 44 is rotationally driven in the forward direction through the intermediate transmission cylinder 59, each clutch plate, and the clutch case 53, and when the reverse clutch 52 is connected, the output shaft 44 is rotated from the counter shaft 17 to the gear 41.33, the transmission shaft 35, Gear 34, idle gear 46, gear 45, each clutch {reverse, clutch case 53
The output shaft 44 is rotationally driven in the reverse direction.

Note that the output shaft 44 is interlocked with the axle via an auxiliary transmission device, a differential device, etc. (not shown).

The embodiment of the present invention is structured as described above, and when adopting a hydraulic forward/reverse switching device I2 in place of the mechanical forward/reverse switching device by Schick, the spline portion 40 of the counter shaft 17 and Since the spline portion of the second clutch plate of the hydraulic clutch 50 is interlocked and connected to each other using the intermediate transmission cylinder 59, both the spline portion 40 of the counter shaft work 7 and the temporary spline portion of the second clutch It is not necessary that the diameters match, and it is sufficient to shape the spline portion 6l on the inner circumferential surface of the intermediate transmission cylinder 59 so that it matches the spline portion 40 of the counter shaft 17. Regardless of the size, it can be adapted to each model by changing the diameter of the spline portion 61 on the inner peripheral surface of the intermediate transmission cylinder 59, and there is no need to change large parts such as the counter shaft 17, making it possible to create a hydraulic clutch at low cost. can be achieved.

Also, when assembling the hydraulic clutch 50 to the counter shaft 17 side, the first clutch plate, the second clutch plate, the intermediate transmission cylinder 59, etc. are assembled to the output shaft 44 side in advance, and then the spline portion of the intermediate transmission cylinder 59 is assembled. 61 to the spline portion 40 of the counter shaft 17, and as in the conventional method, the spline portions of each second clutch plate are sequentially fitted to the spline portion 40 of the counter shaft 17, respectively. The assembly work can be made easier compared to the conventional method. In the above embodiment, the forward/reverse switching device 12 is shown as being applied, but other speed change sections may be used. (Effects of the Invention) According to the present invention, the first shaft and the second shaft are rotatably supported on the same axis, and the clutch case is provided on one shaft in a relatively non-rotatable manner. A plurality of first clutch plates are non-rotatably provided on the outer support tube of the shaft, and a plurality of second clutch plates are provided on the other shaft side of the shaft in a non-rotatable manner, alternating with the first clutch plates. The receiving plate is held in place by the outer support cylinder on the side, and the first and second shafts are pressed in the axial direction by the piston from the other side of the first clutch plate and the second clutch plate, and the pressure is released. In the hydraulic clutch device, a spline portion provided on the inner circumferential side of each second clutch plate is provided on the outer circumferential surface of the intermediate transmission cylinder that is relatively rotatably supported on the one shaft side. The spline part provided on the inner peripheral surface of the intermediate transmission cylinder is spline-fitted to the spline part provided on the outer peripheral surface of the other shaft. By making changes, it can be easily adapted to different models, and other parts can be used interchangeably. Additionally, it can be connected to the other shaft with the intermediate transmission cylinder etc. assembled in advance, making assembly work easier.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a transmission showing an embodiment of the present invention. 17...Counter shaft, 40...Spline part, 44
...Output shaft, 53...Clutch case, 54...
Outer support cylinder part, 55... Temporary support, 59... Intermediate transmission shaft,
60...Spline part, 61...Spline part, 6
5.66... Piston.

Claims (1)

[Claims] (1) The first shaft (17
) and a second shaft (44), a clutch case (53) is provided on one shaft (44) in a relatively non-rotatable manner, and a relatively non-rotatable shaft is provided on the outer support cylinder part (54) of the clutch case (53). is provided with a plurality of first clutch plates, and the other shaft (17
) side, a plurality of second clutch plates are provided alternately with the first clutch plates, and the receiving plate (55) is held in place by the outer support cylinder (54) on one side, The piston (6) from the other side of the first clutch plate and second clutch plate
5) in the axial direction and its release, the first
In a hydraulic clutch (50) device that connects and disconnects power transmission between a shaft (17) and a second shaft (44), a spline portion provided on the inner peripheral side of each second clutch plate connects and disconnects power transmission between the shaft (17) and a second shaft (44).
) side, which is relatively rotatably supported on the intermediate transmission cylinder (59). 61) is spline-fitted to a spline portion (40) provided on the outer peripheral surface of the other shaft (17).