JPH01141237A - Clutch releasing device - Google Patents

Abstract

PURPOSE:To reduce the length in the axial direction by constituting a fluid pressure operating means from an immovable member and a movable member having a stepped part having the surfaces opposed each other in the working power transmission direction and installing said movable member in slidable manners only towards the inside of the immovable member. CONSTITUTION:An inlet 2b, passage 2e, and an expansion chamber A are filled with working fluid. When the working fluid is sent into the inlet 2b by the operation of a clutch pedal, etc., the expansion chamber A generates an internal pressure, and said pressure presses a piston 3 (movable member) so that the stepped parts 2d and 3d are separated in the axial direction, and one edge 15a of the inner ring 15 of a bearing installed onto the piston 3 is attached with the hook of a clutch device. Therefore, to clutch device is put into a release state. When the clutch pedal is returned to an original state, the piston 3 is put into the state shown on the figure. In other words, since the piston 3 is installed on the inner periphery for a cylinder (immovable member) 2, and a clutch release bearing device is installed inside the piston 3, the length in the axial direction can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fluid pressure actuated clutch release device.

[Prior Art] Generally, this type of clutch release device has a clutch release bearing in a sleeve that is slidably mounted in the axial direction around an input shaft that is provided in a protruding manner in a transmission device. The inner ring of this bearing is rotatable,
The rotatable inner ring is brought into contact with a diaphragm spring or pawl of the clutch device to cause a clutch release action.

A fluid pressure actuated clutch release device in which the latch release action is caused by an external working fluid has already been proposed, for example, in Japanese Patent Application No. 62-158.
No. 815 discloses a hydraulically actuated clutch release device that is self-aligning.

[Problems to be Solved by the Invention] In recent years, the proportion of automobiles with FF (front-engine front-wheel drive) drive has been increasing. Automobiles with this FF drive type usually have an engine placed horizontally, that is, the direction of the crankshaft and the axle are aligned, and the engine and a gear transmission with a speed change function are placed in the direction of the crankshaft. connected in series. However, since the vehicle body width is regulated, the length of the combination of the engine and the transmission device in the crankshaft direction is strictly limited. Therefore, the axial length of the clutch release device provided between the engine and the transmission device is also severely limited.

However, in the conventional fluid pressure operated clutch release device as disclosed in the above-mentioned Japanese Patent Application No. 158815/1987, the assembly of the release bearing and the piston/cylinder section that presses the release bearing is arranged in series in the axial direction. In addition to the overall length of the assembly, the stroke length for releasing the clutch is also required as the practical axial length of the clutch release device. It was not possible to shorten it significantly.

Also.

Conventional fluid pressure operated clutch release devices have a large number of parts and are expensive to manufacture.
Fewer parts and lower manufacturing costs were required.

The present invention provides a clutch release device that is shorter in axial length and has a reduced number of component parts than conventional fluid pressure actuated clutch release devices.

[Means for Solving the Problems] A clutch release device according to the present invention comprises a clutch release bearing device for clutch release, and a fluid pressure operating means for suppressing the bearing device to perform a clutch release operation, The clutch release bearing device comprises a bearing consisting of at least an outer ring, an inner ring which is a rotating ring, and rolling elements arranged between the two rings, and a bearing holding means for holding the bearing, and further includes a bearing holding means for holding the bearing. In a clutch release device having elastic means for biasing the device in one direction, the fluid pressure actuating means comprises a movable member and a stationary member, each comprising stepped portions facing each other in the actuating force transmission direction and having the same surface. The movable member is slidably provided only inwardly with respect to the stationary member, and includes the opposing surface of the stationary member, the peripheral surface facing the movable member, and the surface of the movable member that faces the movable member. a facing surface and a peripheral surface facing the immovable member.

defines a pressure chamber that receives working fluid from the outside.

When the working fluid expands the pressure chamber, the clutch release bearing device installed inside the movable member is moved in the working force transmission direction via the movable member, It is characterized in that a rotation prevention means is provided between the movable member and the immovable member to prevent rotation of each other.

[Operation] In the clutch release device according to the present invention, since the movable member is provided on the inner periphery of the stationary member, the movable member and the stationary member are not in a serial arrangement relationship, and Since the clutch release bearing device is provided inside the movable member, the movable member and the clutch release bearing device are not arranged in series, and therefore the axial length of the clutch release device is shortened.

Furthermore, unlike a conventional clutch release device, the movable member has a structure in which the inner and outer peripheries of the movable member are wrapped around the fixed member, and the movable member is provided only inside the fixed member. The clutch release device has a small number of parts and has a simple configuration.

[Embodiments] Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an axial sectional view of a clutch release device 1 according to the present invention.

The cylindrical cylinder 2, which is provided on a part of the outer circumference so that the cylindrical part 2a faces outward, has a large inner diameter part 2c and a small inner diameter part 2h that communicate with each other, and the joint part extends in the radial direction. An extending step portion 2d is formed. A cylindrical piston 3 is provided inside the cylinder 2, which is open at both ends, so as to be slidable in the axial direction, and the piston 3 has a large outer diameter section 3a and a small outer diameter section 3C. The joint portion between the diameter portion 3a and the small outer diameter portion 3c forms a step portion 3b extending in the radial direction.

Since the large inner diameter part 2c and the large outer diameter part 3a and the small inner diameter part 2h and the small outer diameter part 3C have the same diameter, when the cylinder 2 and the piston 3 are assembled, the large inner diameter The part 2c, the stepped part 2d, the small outer diameter part 3c, and the stepped part 3
b forms an expansion chamber A for a working fluid (not shown). The expansion chamber A communicates with a working fluid passage 2e, which in turn communicates with a working fluid inlet 2b provided in the cylindrical portion 2a.

A groove 2j is provided along the entire circumference in the circumferential direction near the free end on the large inner diameter portion 2C of the cylinder 2.
- a ring 4 is arranged; Further, a groove 2k is provided along the entire circumference in the circumferential direction near the stepped portion 2d on the small outer diameter portion 2h of the cylinder 2, and an O-ring 5 is disposed inside the groove 2. There is. The O-ring 4.5 seals the working fluid in the expansion chamber A.

The piston 3 constitutes a movable member, and the cylinder 2 constitutes a stationary member.

A front inner circumferential portion 3g of the piston 3 and an inner circumferential stepped portion 3e extending inward near the center of the piston 3 form a bearing device holding area. Further, the large circular tube section 8b and the small circular tube section 8d are each connected in series at one end by an inner disk section 8c, and furthermore, at the other end of the large circular tube section 8b, an outer disk section 8a is connected.
is provided. The bearing holder 8 is firmly attached to the piston 3 by bringing the large circular pipe part 8b into contact with the front inner peripheral part 3g of the piston 3, and by bringing a part of the rear disc part 8c into contact with the inner peripheral stepped part 3e of the piston 3. It is designed to be held in

The inner disk portion 8c of the bearing holder 8 is configured to receive one end of the spring 16 using the small circular tube portion 8d as a guide. Further, the outer disk portion 8a and the inner disk portion 8 of the bearing holder 8
The outer ring 10 of the bearing 19 is sandwiched between the outer ring 10 and the wave spring 9, and performs the alignment function of the bearing 19. Outer shaft 10. The bearing 19 composed of the rolling elements 11, the cage 14, the seal bodies 12, 13, and the inner ring 15 may be of ordinary type;
Since the details are not particularly described, and the alignment function is also a common one, the details will not be described below, and the present invention is not limited thereto.

The cylinder 2 has one end 2n in contact with the mission case 17, and is fastened to the mission case 17 with bolts 18 through bolt holes 2Q of a flange portion 2m provided around the cylinder 2. Further, on the surface of the mission case 17, for example, an annular groove 17a for guiding the spring 16 is formed, and the other end of the spring 16 is received. The piston 3 has a circumferential groove 3d near the free end on the large outer diameter portion 3a, and the circumferential groove 3d
A dustproof cover 7 is provided around the cylinder 3 by fitting a claw 7a into the cylinder 3.

Next, the structure of the ring 6 with a protrusion, which is a rotation (relative rotation) prevention means, will be explained with reference to FIGS. 1 to 4.

FIG. 2 is a diagram of the clutch series device 1 of FIG. 1 cut along line BB and viewed in the direction of the arrow, but the central portion is omitted for easier understanding. In FIG. 2, only the end face of the cylinder 2 is cut away.

A groove 2f is provided in the cylinder 2 at a predetermined distance from the free end of the small inner diameter portion 2h in the axial direction (see FIG. 1).A notch 31 is also provided at the free end of the small outer diameter portion 3c of the piston 3. The protrusion 6b is engaged with the notch 31, and the protrusion-equipped ring 6 is attached coaxially and in series through the caulking portions 3h (three locations) of the piston 3. Also, a ring with a protrusion 6
has a protrusion 6a that engages with the groove 2f of the cylinder 2, and the protrusion 6a is movable in the axial direction within the groove 2f, but is prevented from moving in the rotational direction.

Ribs 3f are provided at three locations inside the small outer diameter portion 3C of the piston 3, contributing to improving the rigidity of the piston 3.

3 is a diagram showing only the ring with projection 6 shown in FIG. 2, and FIG. 4 is a diagram showing only the piston 3 shown in FIG. It should be noted that the relationship between the above-mentioned groove and the protrusion that engages with the groove, which is not visible in the figure, is contrary to the above-mentioned embodiment. The piston can also be designed and implemented by engaging this protrusion with a groove in the piston.

Next, the operation of the clutch release device 1 according to the present invention will be described.

FIG. 1 shows a state before the clutch release device 1 performs a clutch release action. A working fluid supply line (not shown) is connected to the working fluid port 2b,
The working fluid fills the working fluid population 2b, the passage 2e and the expansion chamber A.

By operations such as depressing the clutch pedal.

When pressurized working fluid is sent from a working fluid supply source (not shown) through the working fluid supply line, the expansion chamber A generates internal pressure, causing the piston 2 to move axially into the stepped section. 2d and 3b are pressed apart, and one end 15a of the inner ring 15 of the bearing attached to the piston 3 is brought into contact with a pawl of a clutch device (not shown).

This operation brings the clutch device into the released state. By an operation such as returning the clutch pedal to its original position, the internal pressure in the expansion chamber A decreases, and the piston 3 returns to the state shown in FIG. 1 due to the pressing force from the claw of the clutch device.

The protruding ring 6 is placed on the piston 3 by assembling the cylinder 2 and piston 3 and then caulking the caulking portion 3h. Therefore, the protruded ring 6 and the piston 3 are integrated, and the protrusion 6b prevents the protrusion 15J6 from rotating relative to the piston 3.

Further, the protrusion 6a of the protruded ring 6 moves in the axial direction within the groove 2f of the cylinder 2 in accordance with the clutch release operation.

However, the projection 6a prevents the projection-equipped ring 6 from rotating relative to the cylinder 2.

Therefore, the cylinder 2 and the piston 3 are in a non-rotatable relationship with each other via the protruding ring 6.

Furthermore, even when the clutch device and the clutch release device 1 are separated for inspection or the like, the piston 3 will not fall out from the clutch release device 1 because the protrusion 6a comes into contact with the inner part 2g of the cylinder groove 2f. It has a structure.

Note that the present invention should not be construed as being limited to the above embodiments, and it goes without saying that changes and improvements can be made as appropriate within the scope of the invention.1 For example, the O-ring groove may be a cylinder. Instead, it may be provided on the piston.

Further, the means for fastening the ring 6 with the protrusion and the piston 3 is not limited to caulking, but may also be a bolt or the like.Furthermore, the ring with the protrusion and the two caulking parts are omitted, and the remaining one caulking part is removed. The same effect as in the embodiment can also be obtained by folding it towards the side and engaging it with the groove 2f.

[Effects of the Invention] As described above, in the clutch release device according to the present invention, the movable member is provided inside the stationary member, and the clutch release bearing device is provided inside the movable member. Therefore, it is possible to shorten the axial length and further reduce the number of parts.

[Brief explanation of the drawing]

FIG. 1 is an axial sectional view of a clutch release device II according to the present invention. 2 is a view of the clutch release device 1 of FIG. 1 cut along a plane including line BB and viewed in the direction of the arrow, and FIG. 3 shows only the ring 6 with projections of FIG. 2. FIG. 4 is a diagram showing only the piston 3 of FIG. 2. [Explanation of symbols of main parts]

Claims (1)

[Scope of Claims] 1. Consists of a clutch release bearing device for a clutch release and a fluid pressure actuating means for pressing the bearing device to perform a clutch release operation, wherein the clutch release bearing device is at least a fixed shaft. The clutch release bearing device is composed of a bearing consisting of an outer ring, an inner ring which is a rotating ring, and rolling elements arranged between the two wheels, and a bearing holding means for holding the bearing, and further biases the clutch release bearing device in one direction. In the clutch release device, the fluid pressure actuating means is composed of a movable member and a stationary member each having a stepped portion having opposing surfaces facing each other in the actuation force transmission direction, and the movable member is It is slidably provided on the inner peripheral side of the immovable member, and includes the opposing surface of the immovable member, the inner peripheral surface facing the movable member, the opposing surface of the movable member, and the immovable member. The opposing outer peripheral surfaces define a pressure chamber that receives a working fluid from the outside, and when the working fluid expands the pressure chamber, the movable member is attached to the inner side of the movable member via the movable member. The clutch release bearing device is adapted to be moved in the operating force transmission direction, and a rotation prevention means for preventing rotation of each other is provided between the movable member and the stationary member. A clutch release device characterized by: 2. The rotation prevention means is comprised of an axial recess provided on the stationary member and a protrusion provided on the movable member, and the engagement between the recess and the protrusion causes
2. The clutch release device according to claim 1, wherein the movable member can be moved by a predetermined distance in the axial direction with respect to the stationary member. 3. The bearing holding means is characterized by comprising: a large circular tube section, a small circular tube section, and an inner disk section that connects the large circular tube section and the small circular tube section. A clutch release device according to claim 1 or 2. 4. The elastic body that urges the clutch release bearing device in one direction is interposed between opposing surfaces of the transmission case to which the clutch release bearing device is attached and the bearing holding means, and the bearing 4. The clutch release device according to claim 3, wherein the clutch release device is guided by a small circular tube portion of the holding means.