JPH10246248A - Clutch release bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clutch release bearing device which can improve freedom of design of a reinforcing member while securing holding of the reinforcing member. SOLUTION: A rectangular opening is formed in the vicinity of a cutout of a spring member 30 in order to adjust degree of rigidity of the spring member 30. It is thus possible to press a tongue part which is occasionally arranged on a reinforcing member 40 extendingly in the radially outer direction by means of the spring member 30. Freedom of design of the reinforcing member 40 is improved.

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. The clutch release bearing device made of
As shown in No. 33452, it is provided between a diaphragm spring and a shift fork.

[0004] In the clutch release bearing device disclosed in Japanese Patent Application No. 7-333452, the guide sleeve is made of resin. A reinforcing member made of a steel plate is provided between the shift fork and the guide sleeve.

FIG. 6 is a perspective view of a conventional reinforcing member 140 and a spring member 130 as disclosed in Japanese Patent Application No. 7-333452. The reinforcing member 140 uses a spring member 130 that overlaps a flange with a guide sleeve (not shown) and further fixes a bearing (not shown).
It can be attached to the guide sleeve.

The spring member 130 is inserted into a notch 141 formed in a flange of the reinforcing member 140. Here, the notch 141 has a C-shape,
When the spring member 130 is inserted into the notch 141, the notch 14
The opposing projections 141a and 141b at the entrance of the
0 and the guide sleeve, so that separation between the reinforcing member 140 and the guide sleeve is prevented.

[0007]

Here, the spring member 13 is used.
The zero base 131 is attached by locking its tip to a locking projection (not shown) on the guide sleeve. Therefore, the opposing projection 141a of the notch 141,
141b is a reinforcement member 1 for escaping the locking projection.
41 must be arranged on the outer periphery of the flange.

On the other hand, in designing the peripheral parts of the clutch release bearing device, there is a situation in which it is desired that the outer periphery of the reinforcing member be as small as possible. However, the position where the opposed protrusions 141a and 141b of the notch 141 are provided is determined by the length l of the base portion 131 of the spring member 130, so it is difficult to significantly reduce the outer diameter of the reinforcing member 141 in such a configuration. It is.

On the other hand, it has been proposed that the opposing projections 141a and 141b be eliminated at the entrance of the notch 141 and a tongue having a similar function be provided at the bottom of the notch 141 instead. According to this proposal, the outer diameter of the reinforcing member can be easily reduced, and the clutch release bearing device can be made compact. However, the spring member 13
In the case of No. 0, the protrusion formed on the guide sleeve is resiliently deformed so that the protrusion can be assembled, so that a moderately low rigidity is required so as to be easily elastically deformed. However, in the prior art, the requirement is satisfied by forming a long notch 138 in the base portion 131.

As is clear from the above, as long as the long cutout 138 is formed in the spring member 130 as in the prior art, the spring member 130 cannot hold down the tongue provided at the bottom of the cutout 141. Therefore, in order to secure the holding of the reinforcing member, the facing protrusion 141a is provided at the entrance of the notch 141,
141b had to be formed, which reduced the degree of freedom in design.

Accordingly, an object of the present invention is to provide a clutch release bearing device which can increase the degree of freedom in designing a reinforcing member while securing the holding of the reinforcing member.

[0012]

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. A clutch release bearing, a bearing holding member slidably fitted on a guide shaft, and holding the one ring of the clutch release bearing in a radial direction with respect to the bearing holding member. In the clutch release bearing device, the bearing holding member is provided with a convex portion, the connecting member is provided with a concave portion, and at the time of assembly, the connecting member is elastically deformed. The connecting member is configured to return to its original shape when the convex portion engages with the concave portion. Forming an opening in the vicinity of the recess, thereby being adjusted the degree of rigidity of the connecting member.

[0013]

According to the present invention, an opening is formed in the vicinity of the concave portion in the connecting member to adjust the degree of rigidity of the connecting member, so that, for example, the connecting member extends radially outward. Even when the tongue portion is provided on the reinforcing member, the tongue portion can be pressed by the connecting member, so that the degree of freedom in designing the reinforcing member increases.

[0014]

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 shows II-I of FIG.
FIG. 3 is an axial sectional view taken along the line I and viewed in the direction of the arrow.

In FIG. 2, the clutch release bearing device comprises a clutch release bearing 10, a guide sleeve 20 as a bearing holding member, and a spring member 30 as a connecting member.
And a reinforcing member 40. 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 and 18 for sealing a space defined by the outer ring 12 and the outer ring 12 in a dust-proof and oil-tight manner. Inner ring 11 is outer ring 12
Are rotatably supported. 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).

On the other hand, the guide sleeve 20 is made of molded resin and has a cylindrical main body 21 and a main body 21.
Flange portion 2 extending radially from the outer periphery near the center of
2 and an outer wall portion 23 protruding leftward in the axial direction at a radially outer end of the flange portion 22. Body 2
A guide shaft (not shown) extends inside the body 1 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. Outer wall 23
Is provided outside the clutch release bearing 10 and serves as a movement restricting portion in the radial direction. A gap 27 is formed between the outer periphery of the outer race 12 and the inner periphery of the outer wall portion 23 so that the clutch release bearing 10 can be moved in the radial direction. Further, the flange portion 22 is provided with a spring member 30.
Has an outer protrusion 22h extending in the radial direction at the mounting portion.

In FIG. 1, a substantially semicircular projection 22f is formed on the upper left end and the lower right end of the flange portion 22 of the guide sleeve 20. In addition, the flange portion 22 includes
A pair of stopper portions 25 and protrusions 22c are formed at the mounting positions of the respective spring members 30. Stopper part 2
Numeral 5 has a function of a guide when the spring member 30 is assembled, and extends on both sides of the spring member 30 in the axial direction as shown in FIG.

As is apparent from FIG. 1, the spring member 30 provided with two members having the same shape has a function of attaching the clutch release bearing 10 to the guide sleeve 20. FIG. 3 is a view showing the spring member 30, and FIG.
3A is a front view of the spring member 30 as viewed from the engine side, FIG. 3B is a side view thereof, and FIG. 3C is a view of the spring member 30 as viewed from the shift fork side. . The spring member 30 is formed by punching out a single spring steel plate such as SK5 with a press, bending the plate, and then performing quenching. The spring member 30 includes a base portion 31 that contacts the flange portion 22 of the guide sleeve 20, a pressing portion 32 that contacts the outer ring 12 of the bearing, and the base portion 31 and the pressing portion 3.
2 and a beam portion 33 for applying an elastic force to bias the outer ring 12 to the pressing portion 32. The pressing portion 32 has an inclined portion 32a inclined outward in the axial direction so as not to contact the seal 17 and to facilitate the assembly of the spring member 30.

Further, the spring member 30 has a protruding portion 34 formed so as to protrude in a radial direction at an intersection of the base portion 31 and the beam portion 33, and the protruding portion 34 is formed by a flange of the guide sleeve 20. It corresponds to 22 outward projections 22h. Further, rectangular tabs 31a and 31b are formed on both sides of the center of the upper half of the base portion 31. On the other hand, the lower half of the base portion 31 is bent twice to form the step portion 3.
1c (see FIG. 3B).

In the vicinity of the lower end on both sides of the step 31c,
A notch 37 serving as a recess is formed (see FIG. 3C).
Further, a relatively large notch 3 is provided at the center of the lower edge of the step portion 31c.
8 are formed. Chamfer 3 at the entrance of notch 38
9 are formed. Further, a rectangular opening 36 is formed at the center of the step portion 31c.

FIG. 4 is a view of the reinforcing member 40 viewed from the same direction as FIG. The reinforcing member 40 includes a cylindrical portion 41, a disk-shaped anvil portion 42 connected to the cylindrical portion 41, and a guide portion 43 extending in the axial direction from the upper end and the lower end of the anvil portion 42. It is formed by pressing a thick plate and then quenching. As a result, remarkable wear does not occur at the contact portion with the shift fork. Further, by coating the anvil portion 42 with titanium, remarkable wear can be prevented.

The cylindrical portion 41 has an inside diameter that just fits into the main body 21 when attached to the guide sleeve 20, so that positioning of the reinforcing member 40 in the radial direction is achieved.

In the anvil portion 42 of the reinforcing member 40, two small cutouts 42a and two rectangular cutouts 42b are formed in the circumferential portion. The small notch 42a engages with a protrusion 22f formed at a position corresponding to the flange portion 22 of the guide sleeve 20 at the time of attachment, thereby achieving the rotation stop of the reinforcing member 40. The rectangular notch 42b has a tongue 42c extending radially outward from the center of the bottom. As shown in FIG. 2, the tongue 42 c is slightly bent twice, and the tongue 42 c is held between the flange 22 of the guide sleeve 20 and the spring member 30, and the reinforcing member 40 and the guide Separation from the sleeve 30 is prevented.

As is apparent from FIG. 1, the stopper portion 25 has a function of guiding the spring member 30 when it is attached to the guide sleeve 20, and comes into contact with the tabs 31a and 31b so that the spring member 30 is further moved. Functions to prevent being pushed inward. The projection 44 is for engaging a clip (not shown) for connecting the shift fork and the clutch release bearing.

FIG. 5 is a view of the clutch release bearing device of FIG. 1 cut along line VV, enlarged and viewed in the direction of the arrow. The protrusion 22c is formed on the flange portion 22 of the guide sleeve 20 as described above. The protrusion 22c, which is a protrusion, is formed of a slope 22d and a base 22e, and has a shape that engages with the notch 37 when the spring member 30 is mounted.

Next, the operation of the clutch release bearing device according to the embodiment of the present invention will be described below. FIG.
At, the shift fork (not shown) pivots, and its tip contacts the anvil portion 42 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. Although the shift fork and the anvil part 42 are in sliding contact with each other, the anvil part 42 is titanium-coated or quenched as described above, so that wear can be reduced. 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 11 is rotatable, so that the inner ring 11 rotates together with the diaphragm spring after abutment, and further the bearing device moves in the axial direction, whereby the diaphragm spring is pressed and the clutch is pressed. It is to be operated.

The spring member 30 has an appropriate plate thickness.
The clutch release bearing 10 with respect to the guide sleeve 20
Is supported only by the frictional force acting between the pressing portion 32 and the outer ring 12, so that the clutch release bearing 10 can move 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 outer wall portion 23 of the guide sleeve 20 has a function of restricting the clutch release bearing 10 from moving outward in the radial direction by a predetermined amount or more. Further, since the outer ring of a general ball bearing does not have a flange in many cases, if the outer ring is sandwiched by the spring member 30 as in the present embodiment, it is not necessary to modify the outer ring itself and an existing one can be used. It can be used and can contribute to cost reduction.

Next, a method of assembling the clutch release bearing device will be described. Body 21 of guide sleeve 20
Around the clutch release bearing 10 and the reinforcing member 4.
After the 0 is disposed, the spring member 30 is inserted while being guided by the guide portion 25 of the guide sleeve 20 from obliquely above and obliquely below in FIG. Since the spring member 30 can be inserted from one direction of the outer periphery, assembly is easy. The spring member 30 is provided on the protrusion 2 of the guide sleeve 20.
The notch 37 engages with the protrusion 22c while elastically deforming the 2c, and the tabs 31a and 31b respectively
When it comes into contact with the pair of stoppers 25, it returns to a predetermined shape, and the assembly is completed. Although the insertion of the spring member 30 is relatively easily performed by the action of the slope 22d, the spring member 30 is configured so as not to be inadvertently pulled out by the action of the base portion 22e after the engagement once.

By the way, if the rigidity of the spring member 30 is too high, the guide sleeve 20 is made of resin, so that there is a possibility that the projection 22c may be shaved when the projection is run on.
Therefore, it is necessary to make the spring member 30 have appropriate rigidity. Here, in the prior art, the notch 38 of the base portion 31 is largely driven inward to make the rigidity appropriate. However, in this embodiment, the notch 3
Since the reinforcing member 40 is held by extending inward of the notch 8, the notch 38 cannot be driven inward largely. Therefore, as shown in FIG.
Instead of driving the notch 38 inward, a rectangular opening 36 is formed in the base portion 31 to reduce the rigidity of the spring member 30 to an appropriate level.
Is prevented from being scraped.

Although the present invention has been described with reference to the embodiments, the present invention should not be construed as being limited to the above-described embodiments, and it is needless to say that modifications and improvements can be made as appropriate. is there. For example, the number of the spring members 30 is three instead of two.
One. Further, the configuration of the present invention is possible even if the rotating wheel is not the inner wheel but the outer wheel.

[0031]

As described above, according to the clutch release bearing device of the present invention, an opening is formed in the vicinity of the concave portion in the connecting member, whereby the degree of rigidity of the connecting member is adjusted. For example, even when a tongue extending outward in the radial direction is provided on the reinforcing member, the tongue can be pressed by the connecting member, so that the degree of freedom in designing the reinforcing member is increased.

[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.

3A and 3B are views showing a spring member 30. FIG. 3A is a front view of the spring member 30 as viewed from the engine side.
FIG. 3B is a side view thereof, and FIG. 3C is a view of the spring member 30 as viewed from the shift fork side.

FIG. 4 is a view of the reinforcing member viewed from the same direction as FIG.

FIG. 5 is a view of the clutch release bearing device of FIG. 1 cut along line VV, enlarged and viewed in the direction of the arrow.

FIG. 6 shows a reinforcing member 140 and a spring member 13 according to the prior art.
FIG.

[Explanation of symbols]

 10 clutch release bearing 20 guide sleeve 30 spring member 36 rectangular opening 40 reinforcing member

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. A bearing holding member slidably fitted on a guide shaft; and a connecting member 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 comprising: a convex portion is provided in the bearing holding member, a concave portion is provided in the connecting member, and the assembling member moves over the convex portion while being elastically deformed during assembly. It is like
Further, the connecting member returns to its original shape when the convex portion engages with the concave portion. The connecting member has an opening formed in the vicinity of the concave portion. A clutch release bearing device that adjusts the degree of rigidity.