JPH10196676A - Clutch release bearing device - Google Patents

Abstract

(57) [Problem] To provide a clutch release bearing device which can achieve a compact configuration and increase freedom of peripheral design without significantly increasing cost. A reinforcing member (40) is provided with a large cylinder (41) that encloses a guide sleeve (20) in a radial direction, and the large cylinder (41) has a function of restricting a radial movement of a clutch release bearing (10) by a predetermined amount or more. , Guide sleeve 2
Therefore, it is not necessary to provide the limiting function of zero, so that the large cylinder 41 of the reinforcing member 40 can be made smaller, and the clutch release bearing device can be made more compact.

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 consisting of
As shown in JP-A-59745, it is provided between a diaphragm spring and a shift fork.

In the clutch release bearing device disclosed in Japanese Patent Application No. 8-259745, the tip of the inner ring of the bearing faces the diaphragm spring. On the other hand, the rear end of the outer ring of the bearing is in contact with the flange of the guide sleeve. Further, the bearing is attached to the guide sleeve such that the outer ring of the bearing and the flange portion are sandwiched in the axial direction by a leaf spring. If the flange of the guide sleeve is pushed from behind by the tip of the shift fork via the reinforcing member, the entire bearing device can be moved in the axial direction so that the tip of the inner ring comes into contact with the diaphragm spring.

Since the bearing outer ring is urged by a leaf spring so as to be movable in the radial direction with respect to the flange portion of the guide sleeve, the flange portion of the guide sleeve is pushed from behind by a shift fork. When the outer ring of the bearing comes in contact with the diaphragm spring of the clutch,
Even if there is eccentricity between the bearings, the bearings are automatically aligned.

[0006]

FIG. 9 is a view of such a conventional clutch release bearing device as viewed from the shift side. FIG. 10 is a view of the clutch release bearing device of FIG. 9 cut along line XX and viewed in the direction of the arrow. FIG.
In 10, a reinforcing member 140 is provided adjacent to the flange portion 22 of the guide sleeve 20, and receives an input from a shift fork (not shown) at a point Ps. In order to resist a large bending moment caused by receiving an input from the shift fork at the point Ps, the reinforcing member 140
By forming the cylindrical portion 141 so as to cover the flange portion 22, the section modulus is improved and rigidity is increased.

Outside the clutch release bearing 10, an outer wall portion 23 is provided at the end of the flange portion 22 to serve as a radial movement restricting portion. That is, the clutch release bearing 10 is provided between the outer periphery of the outer race 12 and the outer wall portion 23.
Is movable in a radial direction by a predetermined amount based on a gap 27 between the inner circumference and the inner circumference.

Here, the cylindrical portion 141 of the reinforcing member 140
Is provided further radially outward of the outer wall portion 23, so that the cylindrical portion 1 can be used to sufficiently secure the thickness of the reinforcing member 140.
The outer diameter of 41 has to be increased, possibly causing interference with other components such as a shift fork, and the degree of freedom in peripheral design is reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a clutch release bearing device which can achieve a compact structure without increasing the cost and can increase the freedom of peripheral design.

[0010]

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 cylindrical portion slidably fitted on a guide shaft, and a bearing holding member provided with a flange portion, and the one ring of the clutch release bearing with respect to the bearing holding member. A connecting member for holding the movable member in the radial direction, and a reinforcing member provided between the input member for applying an input for clutch release and the bearing holding member and adapted to receive the input. In the clutch release bearing device, the reinforcing member is provided with an encircling restricting portion that includes at least a part of the bearing holding member in a radial direction. It is adapted to limit radial movement of more than a predetermined amount of the clutch release bearing.

[0011]

According to the present invention, the reinforcing member is provided with an encircling restricting portion for radially enclosing at least a part of the bearing holding member, and the encircling restricting portion has a radius not less than a predetermined amount of the clutch release bearing. Since the function of restricting the directional movement is provided, it is not necessary to provide the function of restricting the bearing holding member, whereby the surrounding restricting portion of the reinforcing member can be made smaller, and the clutch release bearing device can be made more compact. be able to.

[0012]

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 a first embodiment of the present invention as viewed from a shift fork side. FIG.
FIG. 2 is an axial sectional view taken along the line I-II 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. The clutch release bearing 10 includes a substantially cylindrical inner ring 11 having an abutment portion 11a at the left end, a short cylindrical outer ring 12 concentrically enclosing the inner ring 11, and a roller between the inner ring 11 and the outer ring 12. A plurality of balls 15 movably arranged
And a retainer 16 for holding the balls 15 at predetermined intervals, and seals 17 and 1 for sealing the space defined by the inner ring 11 and the outer ring 12 on both axial sides of the ball 15 in a dust-proof and oil-tight manner.
8 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). The end of the inner ring 11 on the side opposite to the contact portion 11a is left as blank by pressing, so that cutting is not performed and manufacturing cost is reduced.

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 a guide portion 25 (FIG. 1) that protrudes in the axial direction at the 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.

FIG. 3 is a view of the guide sleeve 20 viewed in the same direction as FIG. 1, and FIG. 4 is a view of the guide sleeve 2 of FIG.
FIG. 4 is a partially enlarged view of a line 0 in an IV direction. In FIG.
In the flange portion 22 of the guide sleeve 20, two cylindrical projections 22f extending in parallel with the axis are formed at positions symmetrical with respect to the axis of the guide sleeve 20.

Further, each spring member 30 is provided on the flange portion 22.
22g, and a pair of protrusions 22c are formed. The substantially entire inner surface 22a of the flange portion 22 is lower than the periphery of the flange portion 22 in accordance with the thickness and shape of the reinforcing member 40 described later, but the portion 22b to which the spring member 30 is fitted is higher. Has become.

As 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. 5 is a perspective view of the spring member 30. 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 is provided between the base portion 31 and the pressing portion 32, the base portion 31 abutting on the flange portion of the guide sleeve 20, the pressing portion 32 abutting on the outer ring 12 of the bearing, and the outer ring is provided on the pressing portion 32. And a beam portion 33 for applying an elastic force for urging the beam 12. 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 convex portion 34 formed between the base portion 31 and the beam portion 33 so as to protrude in the radial direction, and the convex portion 34 is provided on the flange 22 of the guide sleeve 20. Corresponding to the end of the part. A notch 37 is formed in the vicinity of the lower end of both sides 31a of the base portion 31, and a relatively large notch 38 is formed in the lower edge 31b. A chamfer 39 is formed at the intersection of the notch 38 and the lower edge 31b.

FIG. 6 is a perspective view of the reinforcing member 40. The reinforcing member 40 includes a large cylinder 41 and a small cylinder 4 serving as the surrounding limiting portion.
2 are connected in series via a disk 47, and the cross section is C
It has a configuration in which arm-shaped arms 43 and 44 are connected to both sides. Two notches 45 and 46 are formed at positions facing each other from the disk 47 to the outer periphery of the large cylinder 41. Originally, the reinforcing member 40 should not be provided with such a notch that causes a reduction in rigidity. However, in order to sandwich the outer ring of the clutch release bearing 10 and the guide sleeve 20, the notches 45 and 46 allow the spring member 30 to be inserted from the outside. Is provided.

The small cylinder 42 has a diameter that just fits into the main body 21 when attached to the guide sleeve 20, so that the radial positioning of the reinforcing member 40 is achieved. Further, the small cylinder 42 has an increased section modulus of the reinforcing member 40 with respect to the bending moment, and the notch is provided to improve the reduced rigidity.

The disk 47 has two circular holes 47a. The hole 47a of the reinforcing member 40 engages with a projection 22f formed at a corresponding position of the flange portion 22 of the guide sleeve 20 at the time of attachment, and the reinforcing member 40
The detent is achieved. The reinforcing member 40 is formed by pressing a relatively thick plate, followed by quenching. This prevents significant wear on the surfaces of the arms 43 and 44 that come into contact with the shift fork.

The stopper 22g of the guide sleeve 20
As is clear from FIG. 1, when the spring member 30 is attached to the guide sleeve 20, the notch 3
8 to prevent the spring member 30 from being pushed further inward. The chamfer 39 of the spring member 30 has a function of facilitating its insertion.

FIG. 7 is a view of the reinforcing member 40 of FIG. 6 attached to the clutch release bearing 10 as viewed in the direction of the arrow. Originally, the reinforcing member 40 and the clutch release bearing 1
In the case where the axes 0 coincide with each other, as shown in FIG.
A predetermined gap 27 is formed between the large cylinder 41 and the zero cylinder 41. Therefore, the clutch release bearing 10 can be freely moved in the radial direction within the range of the gap 27 with respect to the reinforcing member 40 by the centering action of the clutch release bearing device at the time of clutch release. However, the clutch release bearing 1
In the case of 0, the outer ring 12 abuts on the inner peripheral surface 41a of the large cylinder 41 of the reinforcing member 41, thereby preventing further movement in the radial direction. FIG. 7 shows a state in which the outer ring 12 is in contact with the vicinity of the notch 46.

With the above configuration, the guide sleeve 20
It is no longer necessary to provide a movement restricting portion of the clutch release bearing 10 which is conventionally provided on the flange portion 22 of the large cylinder 4.
1 can be driven further inward. Thus, the outer diameter of the large cylinder 41 can be reduced, and thus interference with other components (such as a shift fork) can be further reduced, thereby increasing the degree of freedom in design.

As is apparent from FIG. 7, the widths (lengths in the circumferential direction) of the notches 45 and 46 of the reinforcing member 40 are smaller than the diameter of the outer ring 12.
Even if the clutch 2 comes into contact, the movement of the clutch release bearing 10 in the radial direction can be sufficiently restricted.

FIG. 8 is an enlarged view of a portion cut along the line VIII-VIII in FIG.
The flange portion 22 of the guide sleeve 20 further includes a projection 2
2c is formed. The projection 22c includes a slope 22d and a base 22e, and has a shape that engages with the notch 37 when the spring member 30 is mounted. Since the step between the portion 22a (FIG. 3) and the portion 22b of the flange portion 22 is larger than the thickness of the reinforcing member 40, when the reinforcing member 40 is set there, a gap Δ occurs between the spring member 30 and the reinforcing member 40. It has become.

Further, a second embodiment of the present invention will be described below with reference to the drawings. FIG. 11 shows the second embodiment of the present invention.
FIG. 5 is a view of the clutch release bearing device according to the embodiment of the present invention as viewed from a shift fork side. FIG. 12 is an axial sectional view of the clutch release bearing device of FIG. 11 taken along line XII-XII and viewed in the direction of the arrow. In the second embodiment, the arms 243, 24 of the reinforcing member 240
4 is engaged with the holder 250. The shift fork contacts the holder 250, and the input load of the shift fork is transmitted to the arms 243 and 244 via the holder 250.

Since the arms 243 and 244 are not in direct contact with the shift fork, there is no fear of abrasion. Therefore, it is possible to reduce the heat treatment cost by using a specification in which the reinforcing member 240 is not heat-treated. However, in order to improve the strength of the reinforcing member 240, the reinforcing member 240 may be heat-treated in some cases.

Next, the operation of the clutch release bearing device according to the embodiment of the present invention will be described below. FIG.
In FIG. 7, the shift fork (not shown) pivots, and its tip contacts the rear surfaces of the arms 43 and 44 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 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 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. As described above, the large cylinder 41 of the reinforcing member 40 restricts the clutch release bearing 10 from moving outward in the radial direction by a predetermined amount or more. In addition, since there are many types of outer rings of general ball bearings without a flange, 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.

Since the spring member 30 and the reinforcing member 40 are separated from each other to the extent that a gap Δ is generated as shown in FIG.
Even when a force in a direction perpendicular to the axis is applied to the reinforcing member 40 from the shift fork along with the clutch release operation,
Such a force is not transmitted to the spring member 30. Therefore, the spring member 30 is not deformed by the force from the shift fork.

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 arranged, the spring member 30 is inserted through the cutouts 45 and 46 of the reinforcing member 40 from obliquely above and obliquely below in FIG.
It is inserted while being guided by the guide portion 25 of the guide sleeve 20. Since the spring member 30 can be inserted from one direction of the outer periphery, assembly is easy. The spring member 30 gets over the projection 22c of the guide sleeve 20 while elastically deforming, and returns to a predetermined shape when the notch 37 is engaged with the projection 22c and the notch 38 is in contact with the stopper 22g. The attachment is completed. Although the insertion of the spring member 30 is relatively easily performed by the action of the slope 22d,
Once engaged, it is configured so that it does not accidentally come off due to the action of the platform 22e.

Although the present invention has been described with reference to the embodiments, it should be understood that the present invention should not be construed as being limited to the above embodiments, and 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.

[0034]

As described above, according to the clutch release bearing device of the present invention, the reinforcing member is provided with the surrounding restricting portion that includes at least a part of the bearing holding member in the radial direction, and the surrounding restricting portion is provided on the reinforcing member. Since the clutch release bearing has a function of restricting a radial movement of a predetermined amount or more,
It is no longer necessary to provide the bearing holding member with such a restriction function, whereby the reinforcing member can be driven further inward in the radial direction, and the clutch release bearing device can be made compact.

[Brief description of the drawings]

FIG. 1 is a view of a clutch release bearing device according to a first 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 is a view of the guide sleeve 20 viewed in the same direction as FIG.

FIG. 4 is a partially enlarged view of the guide sleeve 20 of FIG. 3 as viewed in an IV direction.

FIG. 5 is an enlarged perspective view of a spring member 30.

FIG. 6 is a perspective view of a reinforcing member 40.

FIG. 7 shows a reinforcing member 40 shown in FIG.
It is the figure seen in the arrow direction in the state attached to 0.

8 is an enlarged view of a portion cut along the line VII-VII of FIG.

FIG. 9 is a view of a clutch release bearing device according to the related art as viewed from a shift side.

10 is a view of the clutch release bearing device of FIG. 9 cut along line XX and viewed in the direction of the arrow.

FIG. 11 is a view of a clutch release bearing device according to a second embodiment of the present invention as viewed from a shift fork side.

FIG. 12 shows the clutch release bearing device of FIG.
It is the figure cut | disconnected along the -XII line and seen in the arrow direction.

[Explanation of symbols]

 10 clutch release bearing 20 guide sleeve 30 spring member 40, 240 reinforcing member 41 large cylinder

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 including a cylindrical portion slidably fitted on a guide shaft, and a flange portion; and the one ring of the clutch release bearing is moved in a radial direction with respect to the bearing holding member. A clutch which is provided between the input member for applying an input for clutch release and the bearing holding member and is adapted to receive the input; In the release bearing device, the reinforcing member is provided with an encircling restricting portion that includes at least a part of the bearing holding member in a radial direction, and the encircling restricting portion includes the clutch relay. And has a clutch release bearing device adapted to limit radial movement of the predetermined amount or more of's bearings.