JPH10220494A - Clutch releasing bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clutch releasing bearing device inexpensive but capable of maintaining a function over a long term. SOLUTION: The flange 22 of a guide sleeve 20 is provided with a step 23 for preventing a bearing case 30 from radially moving for the flange 22. Consequently, even when a reinforcement member 40 undergoes a force in a radial travel direction, according to the motion of a shift fork, the flange 22 and the bearing case 30 do not give a relative travel in a radial direction. As a result, the tooth 32 of the bearing case 30 is kept in a proper caulking state for the flange 22. The clutch releasing bearing 10 is thereby held properly in the bearing case 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a clutch release bearing device.

[0002]

2. Description of the Related Art When operating a clutch mounted on a vehicle or the like, which is a power interrupting device using a friction plate, a diaphragm spring of a clutch cover is pressed in an axial direction with a shift fork as an input member, thereby causing the spring to operate. Power is disconnected by releasing the biasing force from the friction plate.

[0003] The shift fork is usually arranged on the fixed side of the vehicle body or the like, but the clutch cover is attached to a flywheel or the like of the engine and rotates integrally therewith. Therefore, if the shift fork directly presses the diaphragm spring of the clutch cover, the contact portion will be worn. Therefore, a clutch release bearing including a rotating wheel that abuts against a diaphragm spring and integrally rotates, a non-rotating bearing holding member that holds the bearing in a predetermined state and receives an input from a shift fork. Is provided between the diaphragm spring and the shift fork.

FIG. 5 is a partial sectional view in the axial direction showing an example of a clutch release bearing device similar to the prior art. In the clutch release bearing device shown in FIG. 5, the distal end portion 11a of the inner ring 11 of the bearing 10 faces a diaphragm spring (not shown). On the other hand, the outer ring 12 of the bearing 10
Is in contact with the flange portion 122 of the guide sleeve 120. Further, a bearing case 130 surrounding the bearing 10
Of the bearing outer ring 1 by the urging force of the urging spring 50.
2 against the flange portion 122 so that the bearing 10
Is attached to the guide sleeve 120. If the flange portion 122 of the guide sleeve 120 is pushed from behind by the tip of a shift fork (not shown) via the reinforcing member 40, the entire bearing device can move in the axial direction so that the inner ring tip portion 11a comes into contact with the diaphragm spring. It has become.

[0005] Here, the bearing outer ring 12 is
20 is urged by the urging spring 50 so as to be freely movable in the radial direction with respect to the flange portion 122,
When the outer ring 12 of the bearing 10 abuts against the diaphragm spring of the clutch when the flange 122 of the guide sleeve 120 is pushed from behind by the shift fork, the bearing 10 is automatically adjusted even if there is eccentricity between the two. I'm going to be minded.

[0006]

In the conventional clutch release bearing device, as shown in FIG. 5, there is a gap between the thick portion 122a of the flange portion 122 of the guide sleeve 120 and the bearing case 130. Although the gap A is formed, the following problem occurs due to the formation of the gap A. Reinforcement member 40
Is repeatedly subjected to a radial force due to friction with the pivoting shift fork, and thus slightly moves in the radial direction with the operation of the shift fork. Here, the guide sleeve 120 (flange portion 122) hardly moves in the radial direction, but because of the clearance A, the bearing case 130 moves in the radial direction together with the reinforcing member 40.

[0007] As a result, the swaged claw 132 expands, and the restraining force in the axial direction decreases. Then, the outer ring 12 of the bearing 10 easily rotates together with the inner ring 11. Outer ring 12
Is rotated, a slip occurs with the flange portion 122,
Heat is generated on the sliding surface by frictional heat. Since the guide sleeve 120 including the flange portion 122 is made of resin, there is a possibility that the guide sleeve 120 is melted and deformed by such heat generation.
This may impair the function of the clutch release bearing device. In order to prevent such inconvenience, it is necessary to improve the material, accuracy, and the like of each member, resulting in an increase in the cost of the entire bearing device.

[0008] In view of such problems, an object of the present invention is to provide a clutch release bearing device which is inexpensive and can maintain its function for a long period of time.

[0009]

In order to achieve the above object,
The clutch release bearing device of the present invention includes an inner ring and an outer ring that are concentrically arranged and relatively rotate with each other, one of the wheels is fixed, and the other rotating wheel comes into contact with a rotating member of the clutch device. Bearing having a clutch release bearing, an anvil part pressed by a pivoting input member, and slidably fitted on a guide shaft, and a clutch release bearing for the bearing holding member. In the clutch release bearing device, which comprises: a connecting means for holding the one wheel so as to be movable in the radial direction, the connecting means includes a holding portion for holding the bearing holding member in an axial direction, The bearing holding member is attached to the bearing holding member, and the bearing holding member has a stopper portion that prevents the connecting means from moving in the radial direction with respect to the bearing holding member. Become provided.

[0010]

According to the present invention, the bearing holding member is further provided with a stopper for preventing the connecting means from moving in the radial direction with respect to the bearing holding member.
With the pivoting of the input member, even if the anvil part receives a force in the direction of moving in the radial direction, the bearing holding member and the connecting means do not move relative to each other in the radial direction. The grip of the holding portion of the connecting means with respect to the bearing holding member is maintained, and thus the holding of the clutch release bearing by the connecting means can be ensured.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a view of a clutch release bearing device according to an embodiment of the present invention as viewed from a shift fork side. FIG. 2 is an axial cross-sectional view of the clutch release bearing device of FIG. 1 taken along a line II-II and viewed in a direction indicated by an arrow. FIG. 3 is a view of the clutch release bearing device of FIG. 1 as viewed from the direction of arrow III.

In FIG. 2, a clutch release bearing device includes a clutch release bearing 10 and a guide sleeve 20.
, A bearing case 30, and a reinforcing member 40 that receives an input from the shift fork. Clutch release bearing 1
0 is a substantially cylindrical inner ring 1 having a contact portion 11a at the left end.
1 and a short tubular outer ring 1 concentrically enclosing the inner ring 11
2, a plurality of balls 15 rotatably arranged between the inner ring 11 and the outer ring 12, a retainer 16 for holding the balls 15 at predetermined intervals, and inner rings 11 on both axial sides of the balls 15.
And seals 17, 18 (labyrinth type) for sealing the space defined by the outer ring 12 and the outer ring 12 in a dust-proof and oil-tight manner. The inner race 11 is rotatably supported by the outer race 12. The contact portion 11a of the inner ring 11 has a shape that is turned outward in the radial direction, and comes into contact with a diaphragm spring of a clutch cover (not shown). Further, the end of the inner ring 11 on the opposite side to the contact portion 11a may be left as a blank by pressing, and the manufacturing cost may be reduced without performing the cutting.

On the other hand, the guide sleeve 20 is made of molded resin (66 nylon containing potassium titanate), and has a cylindrical main body 21 and a flange portion extending radially from the outer periphery near the center of the main body 21. 22.
A guide shaft (not shown) extends inside the main body 21, and the main body 21 is slidable on the guide shaft. Note that an enlarged diameter portion 24 is provided inside the main body 21.
The enlarged diameter portion 24 functions to prevent foreign matter from being caught when the main body 21 slides on the guide shaft. An annular step portion 23 as a stopper portion is formed near the outer edge of the flange portion 22 on the engine side (the left side in FIG. 2).

The reinforcing member 40, which is an anvil part, comprises a disk part 41 and a cylindrical part 4 coaxially connected to the center of the disk part 41.
2 and a guide portion 43 extending in the axial direction at the upper and lower portions of the disk portion 41. Reinforcing member 40 is made of relatively hard steel, so that remarkable wear does not occur on receiving surface 41a of disc portion 41 which contacts a shift fork (not shown). The guide portion 43 has a function of guiding the shift fork, and further has an opening 43a for engaging a pin (not shown) for connecting to the shift fork. Here, the guide sleeve 20 and the reinforcing member 40 constitute a bearing holding member.

The cylindrical portion 42 has a diameter and a shape that just fits into the main body 21 when attached to the guide sleeve 20. The disk portion 41 has notches 41 at both ends in the horizontal direction.
The reinforcing member 40 is positioned and prevented from rotating by engaging the projection 22b formed on the flange 22 of the guide sleeve 20 with the notch 41b that is formed during assembly.

The bearing case 30 has a function of attaching the clutch release bearing 10 to the guide sleeve 20. The bearing case 30 includes a cylindrical case portion 31 containing the clutch release bearing 10 and four claw portions 32 extending in the axial direction from the edge of the case portion 31. In addition, the claw part 32 forms a grip part.

FIG. 4 is an enlarged sectional view showing a part IV of the clutch release bearing device of FIG. Bearing case 3
The zero case portion 31 has a bent portion 31a at the end on the engine side (left side in FIG. 4). The bearing case 30 presses the outer ring 12 of the clutch release bearing 10 toward the flange portion 22 by a bent portion 31a of the bearing case 30 via an alignment spring 50 such as a wave spring, for example.
In this state, the claw portion 32 is connected to the flange portion 22 and the reinforcing member 40.
It is attached by caulking against. Here, the coupling means is constituted by the bearing case 30 and the centering spring 50.

The outer ring 1 of the clutch release bearing 10
A fixed interval is provided between the second case 2 and the case portion 31 of the bearing case 30 to enable the later-described bearing self-alignment. As is apparent from FIG. 4, the step portion 23 formed on the flange portion 22 is provided on the case portion 31 of the bearing case 30.
Are fitted and abutted over the entire circumference, and the interference is 0 to 0.4 mm in diameter. Because of such a slight interference, there is little effect on the inner diameter of the guide sleeve 20 due to thermal expansion.

Next, the operation of the clutch release bearing device according to the embodiment of the present invention will be described below. FIG.
At, a shift fork (not shown) pivots, and its tip contacts the surface of the reinforcing member 40 to apply a constant load. Since the reinforcing member 40 has a relatively large thickness and sufficient rigidity, it can support a large load received from the shift fork. The clutch release bearing device slides on a guide shaft (not shown) in the axial direction by an input from a shift fork to bring the contact portion 11a of the inner ring 11 into contact with a diaphragm spring of a clutch cover (not shown). Even if the diaphragm spring is rotating, the inner ring 1
Since 1 is rotatable, it rotates integrally with the diaphragm spring after abutment, and when the bearing device moves in the axial direction, the diaphragm spring is pressed to operate the clutch.

The centering spring 50 has an appropriate urging force, and the clutch release bearing 10 is applied to the guide sleeve 20 by using only the frictional force acting between the centering spring 50 and the flange portion 22 and the outer ring 12. , The clutch release bearing 10 is movable in the radial direction with respect to the guide sleeve 20. Accordingly, when the contact portion 11a of the inner ring 11 contacts the diaphragm spring, if there is an eccentricity between the two, a known force for positioning the clutch release bearing 10 concentrically occurs, thereby causing the clutch release bearing 10 moves in the radial direction to achieve self-centering. The case portion 31 of the bearing case 30 has a function of restricting the clutch release bearing 10 from moving radially outward by a predetermined amount or more.

Here, when a shift fork (not shown) transmits a release force to the reinforcing member 40, the shift fork pivots around a vertical axis which is twisted with respect to the axis of the clutch release bearing device. The frictional force is applied to the reinforcing member 40 while slightly sliding in the horizontal direction in FIG. However, since the step portion 23 of the guide sleeve 20 is firmly fitted and abutted against the case portion 31 of the bearing case 30, the reinforcing member 40 almost moves in the horizontal direction even when a frictional force applied from the shift fork is applied. do not do. Accordingly, the caulked state of the claw portion 32 is maintained firmly, and the outer ring 12 is firmly held by the flange portion 22 and does not rotate together with the inner ring 11. As a result, it is possible to prevent a decline in the function of the clutch release bearing device, which would occur when the outer ring 12 rotates together.

As described above, the present invention has been described with reference to the embodiments. However, the present invention should not be construed as being limited to the above embodiments, and it is needless to say that modifications and improvements can be made as appropriate. is there. For example, a stopper may be formed on the reinforcing member.

[0023]

As described above, according to the clutch release bearing device of the present invention, the bearing holding member has the stopper portion for preventing the connecting means from moving in the radial direction with respect to the bearing holding member. Further provided, with the pivoting of the input member, even if a force is applied in the direction in which the anvil portion moves in the radial direction, the bearing holding member and the connecting means do not relatively move in the radial direction. Thereby, the holding of the holding portion of the connecting means with respect to the bearing holding member is maintained, so that the holding of the clutch release bearing in the connecting means can be ensured.

[Brief description of the drawings]

FIG. 1 is a view of a clutch release bearing device according to an embodiment of the present invention as viewed from a shift fork side.

FIG. 2 is an axial sectional view taken along the line II-II of FIG. 1 and viewed in a direction indicated by an arrow.

FIG. 3 shows the clutch release bearing device of FIG.
It is the figure seen from the direction.

FIG. 4 is an enlarged sectional view showing a part IV of the clutch release bearing device of FIG. 2;

FIG. 5 is a partial sectional view in the axial direction showing an example of a clutch release bearing device according to a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Clutch release bearing 11 Inner ring 12 Outer ring 20 Guide sleeve 23 Step part 30 Bearing case 40 Reinforcement member 50 Centering spring

Claims (1)

[Claims] 1. A clutch release bearing comprising an inner ring and an outer ring which are concentrically arranged and rotate relative to each other, one of which is fixed and the other of which rotates is in contact with a rotating member of a clutch device. And an anvil part pressed by a pivoting input member,
A bearing holding member slidably fitted on the guide shaft; and coupling means for holding the one ring of the clutch release bearing in the bearing holding member so as to be movable in a radial direction. In the clutch release bearing device, the connecting means is attached to the bearing holding member via a grip portion that grips the bearing holding member in an axial direction. A clutch release bearing device further comprising a stopper portion for preventing the bearing holding member from moving in a radial direction.