JP2000055081A - Conical clutch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conical clutch which has a large torque capacity and which can prevent components from sticking to one another when the clutch is released, without having an excessive strength around the device. SOLUTION: A housing 50 is fixed to an output shaft 60. When fluid is charged into a tube 53, a piston is pressed rightward so as to fasten the clutch, and when the fluid is discharged from the tube, the piston is pressed back leftward by a spring 42. At this stage, the leftward movement of a torque transmitting part 23 is limited by a snap ring 22, thereby it is possible to prevent the members from sticking to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conical clutch used for an automatic transmission, a machine tool or the like.

[0002]

2. Description of the Related Art A conventional conical clutch is shown in FIG.
23 is a torque transmission unit extending from an input shaft (not shown),
Reference numeral 0 denotes a piston which can be spline-fitted to a spline 51 of the housing 50 and can move in the axial direction. Reference numeral 41 denotes a friction material adhered to a conical surface which is an engagement surface of the piston. Reference numeral 52 restricts axial movement of the piston. Retaining ring, 42 is piston 4
A return spring 53 is interposed between the stop ring 52 and the retaining ring 52 and pushes the piston to the left when the piston is released. Reference numeral 53 denotes a tube for inflow of a pressurized fluid. The housing 50 is connected to an output shaft (not shown).

When a clutch is engaged, a tube 53 is used.
When the piston 40 is pressed to the right in the drawing by flowing fluid into the piston, the piston 40 frictionally engages with the conical surface of the torque transmitting portion 23 of the input shaft via the friction material 41, and the rotation of the input shaft is controlled by the spline 51. The rotation of the output shaft is transmitted to the housing 50 through the shaft. To release the clutch, the fluid is discharged from the tube 53, and the piston 40 is pushed back to the left by the spring member 42 interposed between the piston 40 and the retaining ring 52.

[0004]

In the conventional conical clutch, an input side member and an output side member are provided one by one, and a member having a conical surface is actuated in an axial direction to thereby provide a member on the input shaft side. And transmitted the torque. There is a concern that the torque capacity will be insufficient for each surface as in the conventional device.
In addition, since the mating member is pressed and engaged from one side, a load is applied to a component (mainly a bearing) disposed on the pressed side, and the component itself is enlarged in order to impart strength to the component. However, it is necessary to increase the size of the peripheral components, which may lead to an increase in the size of the device and an increase in cost. Further, the friction surfaces may adhere to each other at the time of engagement.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has a member provided at both ends of a clutch and having a concave surface movable in an axial direction and a convex surface movable in an axial direction. A conical clutch is provided, in which a mating member which is relatively rotated is provided between the member and the member provided at both ends of the relative member is sandwiched and engaged with the member from both sides. It is.

[0006] Furthermore, there is a problem that occurs when the clutch is released due to the provision of an elastic piece on the periphery of the mating member or the intermediate member, or the interposition of an elastic member between the mating member and the intermediate member and the sticking between the friction engagement surfaces. Preventing.

[0007]

FIG. 1 is a sectional view of a first embodiment of a conical clutch 10 according to the present invention.
1 is a spline, 22 is a snap ring, 23 is a torque transmitting portion fitted to the spline 21, 30 is a pressure receiving member, and 40 is a piston, both of which are fitted to the spline 51 of the housing 50. 52 is a retaining ring, 42 is interposed between the piston 40 and the retaining ring 52,
A spring member 53 for urging 0 to the left is a tube, and presses the piston 40 to the right by flowing fluid. 31 is a friction material adhered to the conical engagement surface of the pressure receiving member 30, 41 is a friction material adhered to the conical engagement surface of the piston 40, 60 is an output shaft fixed to the housing 50, and 61 is its center. Each axis is represented.

That is, the piston 40 is a moving member having a concave surface, and the pressure receiving member 30 is a member having a convex surface, which is located at both ends of the apparatus. Each is formed.

When the clutch is engaged, the tube 53
When the fluid flows in, the piston 40 is pressed to the right,
The torque transmitting portion 23 is sandwiched between the pressure receiving member 30 and the pressure receiving member 30, and frictionally engages via the friction materials 31 and 41. (Pressure receiving member 30
The rightward movement is prevented by the retaining ring 52. )

The rotation of the input shaft 20 is transmitted from the torque transmitting portion 23 fitted with the spline to the piston 40 and the pressure receiving member 30 frictionally engaged, and the housing 50 is rotated via the spline 51 so that the output shaft is rotated. 60.

When the clutch is released, the fluid is discharged from the tube and the piston 42 is moved by the spring 42.
It is pushed back to the left and disengaged.

In this case, even if the friction engagement surface is stuck, the presence of the snap ring
Does not move further to the left, so sticking can be isolated.

FIG. 2 is a sectional view of the second embodiment, in which the same reference numerals as in FIG. 1 denote the same parts. The difference from FIG. 1 is that there are two torque transmitting portions 23 and an intermediate member 70 is present between them. Reference numeral 71 denotes a friction material attached to both surfaces of the intermediate member 70.

FIG. 3 shows the spline 21 of the torque transmitting section 23.
FIG. 4 is an enlarged view of a fitting portion of the torque transmission unit 23, wherein an elastic piece 24 is provided at a spline fitting portion of the torque transmission unit 23. 25
Is a spline fitted with the spline 21. (A)
Is a front view, and (b) is a sectional view taken along line XX of (a).

The intermediate member 70 is also spline-fitted to the spline 51. FIG. 4 is an enlarged view of the spline-fitted portion, where (a) is a front view and (b) is a sectional view taken along the line YY. Numeral 72 denotes an elastic piece provided at the center, and 73 denotes a spline fitted to the spline 51.

The configuration shown in FIG. 2 differs from the configuration shown in FIG.
Since sticking with 3 cannot be prevented by the snap ring 22, it is prevented by the elastic pieces 24 and 72.

FIG. 5 is a sectional view of the third embodiment, and FIG.
The same reference numerals denote the same parts. The difference from the second embodiment shown in FIG.
No elastic piece is formed at each spline fitting portion of the elastic member 26. Instead, the elastic member 26 is provided between the torque transmitting portion 23 and the snap ring 22, and the elastic member 26 is provided between the intermediate member 70 and the piston 40 and the pressure receiving member 30. Is provided with an elastic member 74, and the elasticity thereof prevents sticking between the members when the clutch is released. The elastic members used here mainly include a leaf spring and a rubber O-ring. The conical clutch of the present invention may be either a wet type or a dry type.

[0018]

The conical clutch of the present invention has the above-described structure, and has a plurality of frictional engagement surfaces, so that a high torque capacity can be obtained, and the torque transmission portion and the spline fitting portion of the intermediate member can be provided. The attached elastic piece or elastic member can prevent sticking between each member when the clutch is released, and the thrust of clutch engagement is received only by the clutch member, so it is necessary to provide more strength than necessary around the device. Is gone.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment.

FIG. 2 is a sectional view of a second embodiment.

FIG. 3 is an enlarged view of a spline fitting portion of the torque transmission unit.

FIG. 4 is an enlarged view of a spline fitting portion of the intermediate member.

FIG. 5 is a sectional view of a third embodiment.

FIG. 6 is a sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Conical clutch 20 Input shaft 21 Spline 22 Snap ring 23 Torque transmission part 24 Elastic piece 25 Spline 26 Elastic member 30 Pressure receiving member 31 Friction material 40 Piston 41 Friction material 42 Spring 50 Housing 51 Spline 52 Stop ring 53 Tube 60 Output shaft 61 Central axis line 70 Intermediate member 71 Friction material 72 Elastic piece 73 Spline 74 Elastic member

Claims (5)

[Claims] 1. A conical clutch having a tapered frictional engagement surface, wherein a counter rotating member is provided between a member having a concave surface and a member having a convex surface provided at both ends of the clutch. The conical clutch is characterized in that the mating members are sandwiched and engaged by the members provided at both ends. 2. Between the both ends and the installed member,
A number of the above-mentioned mating members are provided, and furthermore, between these mating members, an intermediate member which is synchronously rotated with the members provided at the both ends or is fixed at least in the circumferential direction is provided. The conical clutch according to claim 1, wherein the conical clutch engages with a mating member. 3. The spline fitting of the mating member or the intermediate member, and an elastic piece is provided on a peripheral edge on a side having the spline. Conical clutch. 4. The conical clutch according to claim 1, wherein an elastic means is interposed between a plurality of mating members having splines on the same circumferential side. 5. The conical clutch according to claim 1, wherein members are provided on both sides of the mating member in the axial direction to limit movement of the mating member in the axial direction.