JPH06105094B2 - Clutch release bearing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a vehicle clutch release bearing device, and more particularly, to an abutting portion of the clutch release bearing device with which an operating fork comes into contact, which is worn by contact. The present invention relates to a clutch release bearing device which can be prevented.

[Prior art]

As is well known, the clutch release bearing device is axially movably interposed between a diaphragm of the clutch device and an operating fork that interlocks with the clutch pedal, and receives the operating force of the fork to move in the axial direction. It transmits the operating force to the diaphragm and acts to release the clutch. Transmission of the operating force from the operating fork to the bearing device is usually performed by directly contacting the fork with a part of the bearing device and applying a mechanical force. However, in this case, the parts of the bearing device where the forks come into contact with each other are worn by repeated clutch operations, which leads to an increase in the pedaling force of the clutch pedal and a defective disconnection of the clutch. On the other hand, in the prior art, for example, as shown in FIG. 5, it has been attempted to interpose a rolling element 14 between the fork 10 and the bearing device 12 to reduce the wear of the abutting portion by its rotation. (UK Patent No. 1,495,775).

[Problems to be Solved by the Present Invention]

However, the above conventional example has the following drawbacks. That is,
Since the fork 10 pivots around the pin 16, it is a rolling element.
A force F in the direction indicated by F in the figure (which makes an angle θ with the axis XX ′) acts on the 14 from the tip of the fork 10, and the rolling element 14 is pushed up in the radial direction by the force F and rolls. Moving body holding member
A moment is applied to the entire bearing device via 18. As a result, the sliding resistance between the bearing device 12 and the guide shaft 20 increases, and especially when the guide shaft is made of aluminum, the deviation due to the moment causes galling of the sliding portion, abnormal wear, etc. In addition, there is a problem that the ball guide surface of the holding member 18 is duped due to the repeated operation of the forks, and fatigue damage is caused in the fixed portion of the holding member with respect to the bearing.

In view of the above-mentioned circumstances, the present invention eliminates the drawbacks of the clutch release bearing device using a rolling element in the abutting portion of the fork, that is, the fork pivots and the fork similarly to the conventional example. It is an object of the present invention to provide a clutch release bearing device which is a clutch release bearing device using a rolling element in its contact portion, but is devised so that a moment is not generated in the bearing device due to an operating force applied from the fork. It was made as.

[Means and actions for solving problems]

In the clutch release bearing device of the present invention, a clutch release bearing including a contact portion that comes into contact with a diaphragm spring of the clutch device in a vehicle, and the clutch release bearing are held and are movable in the axial direction on a guide shaft of the transmission device. And a holding member that is driven in the axial direction by a drive portion of a drive member that is pivotally supported by a pivot that extends parallel to a direction orthogonal to the axis of the clutch release bearing so as to bring the contact portion of the clutch release bearing into contact with the diaphragm spring. And a portion of the holding member that is driven by the driving portion is an annular anvil portion, and the driving member is provided between the anvil portion and the driving member. An annular moving member that is brought into contact with the drive unit of the And a rolling element is disposed between the moving member and the rolling element, the moving member and the rolling element are moved in a plane in the axial direction of the guide shaft and orthogonal to the axial line of the moving member. And is movable, and the anvil portion receives only the axial force.

That is, according to the present invention, since the rolling element is arranged between the moving member and the anvil portion, the driving member pivots, so that the moving member and the rolling element are Is movable in the axial direction and in a plane orthogonal to the axis of the moving member, and the anvil portion receives only the axial force. As a result, the holding member can move smoothly in the axial direction without tilting with respect to the guide shaft, and galling and abnormal wear do not occur in the sliding portions thereof.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

1 and 2, the clutch release bearing device comprises a clutch release bearing 30 and holding means 40 for holding the clutch release bearing 30. The clutch release bearing 30 has, at one end, a contact portion with the diaphragm spring 35 of the clutch device.
An inner ring 32 having 34 and an outer ring 38 concentrically arranged with the inner ring 32 through a plurality of balls 36 are included, and the inner ring 32 is rotatable relative to the outer ring 38.

The holding means 40 is made of synthetic resin, and has a cylindrical sleeve 42 fitted on the guide shaft 45 of the transmission device,
A ring-shaped anvil 48 made of metal or synthetic resin, which has a cylindrical portion 44 and a radial flange portion 46 continuous to the cylindrical portion 44, is embedded in the sleeve 42, and one end 53 is provided with a spring member 52. The end 54 of the outer ring 38 is engaged, and the other end 54 includes a generally cylindrical case 56 engaged with the outer peripheral edge of the flange 46 of the anvil 48. The anvil 48 has extensions 58 at diametrically opposite portions.

The holding means 40 is further movable relative to the anvil 48 via a suitable number of rollers 64 held by a hollow disc-shaped holder 62 on one side of the flange 46 of the anvil 48. And an annular guide plate 66 as a moving member. As is apparent from FIG. 1, the rollers 64 are three rollers arranged at diametrically opposite positions.
64a and one roller 64b arranged at a position facing each other in the diametrical direction orthogonal to the diametrical direction. An appropriate number of locking claws 68 formed on the case 56 are engaged with the guide plate 66.

The sleeve 42 has a cylindrical shape as a whole, but flat portions 71 parallel to each other are formed at diametrically opposed portions, and the hollow holes of the retainer 62 and the guide plate 66 correspond to the flat portions 71. It is composed of an arc-shaped portion and a linear portion connecting the arc-shaped portions. However, the inner diameters of the arc-shaped portions of the cage 62 and the guide plate 66 are slightly larger than the outer diameter of the sleeve 42,
A slight gap δ is left between them. The first
As shown by the chain double-dashed line in the figure, the fork member 70 as a drive member has a U-shape and is rotatable about an axis AA ′, and a portion behind the roller 64a on the guide plate 66 by an arc motion. It has a pair of contact parts 72 as a drive part that can contact the.

Next, the operation and effect of this embodiment will be described. When the clutch pedal (not shown) is stepped on, the fork member 70 is rotated.
When it is rotated around AA ′, the abutting portion 72 is moved to the guide plate 66.
Abut. At this time, as described above with reference to FIG. 5, a force in the left-right direction in FIG. 1 is applied to the guide plate 66, but the bearing device is not twisted by it. The reason is that the guide plate 66 can be moved in the direction in which the force is applied. That is, the component of the force applied from the fork member 70 to the guide plate 66 in the plate surface direction of the guide plate 66 is absorbed by the movement of the guide plate 66, and the direction perpendicular to the plate surface of the guide plate 66 (in FIG. 2). Only the component in the left-right direction is transmitted from the guide plate 66 to the flange 46 of the anvil 48 via the roller 64.
It should be noted that the movement of the guide plate 66 is limited by closing the gap δ between the guide plate 66 and the sleeve 42.

When an axial force is applied to the anvil 48, the bearing 30 moves leftward in FIG. 2 and the end portion 34 of the inner ring 32 abuts on the diaphragm spring 35, whereby the clutch (not shown) is released. To be done. When there is eccentricity between the bearing 30 and the clutch, centrifugal force causes the bearing 30 to move in the radial direction, and the braking action of the spring member 52 holds the bearing 30 in the aligned position.

In the related art of the present invention shown in FIG. 3, ribs 86 projecting in the plate thickness direction of the cage 84 are formed on both sides of the outer peripheral edge of the annular cage 84 holding the balls 82. Is in contact with the anvil 48 or the guide plate 66. It is desirable to fill the rolling portion of the ball 82 with grease or the like in order to make the rolling smooth, but this may be leaked to the outside due to continued use. However, since the labyrinth is formed by the rib 86 and such leakage is prevented by the sealing action, the smooth movement of the guide plate 66 is maintained for a long period of time. Contact part of fork member 70
72 can contact the recess 65 of the guide plate 66. The ribs 86 are also effective in preventing dust and water from entering from the outside.

Further, in the embodiment shown in FIG. 4, only the left half is shown. The right half is symmetrical to this. Since grease is retained in the rolling portion, the height of the portion 92 of the guide plate 66 corresponding to the roller 64a is Is made larger, whereby a recess 94 for holding grease is formed in the portion 92. Further, a pair of spring members (only one is shown) 94 are provided between the sleeve 42, the guide plate 66, and the retainer (not shown) so that biasing forces are generated in directions opposite to each other (horizontal direction in FIG. 4). Even if the forks 70 are not in contact with the guide plate 66, the relative position of the bearing 70 in the radial direction with respect to the sleeve 42 of the bearing device is stabilized and the axial movement is smoothed. There is.

It should be noted that the present invention should not be construed as being limited to the above-mentioned embodiments, and it is needless to say that the present invention can be appropriately modified within a range not impairing the gist thereof. For example, the specific configuration of the guide plate, the type of clutch release bearing, and the like (non-centering type) can be arbitrarily changed.

Further, when the anvil 48 is made of metal, in order to prevent rust or wear of the contact portion, it may be carried out by coating it with a material for achieving the above purpose, and the anvil 48 is made of a synthetic resin. In this case, this can be integrally molded with the sleeve 42.

〔The invention's effect〕

As described above, according to the present invention, the drive member is brought into contact with the moving member that is movably arranged on the bearing holding member in the plane orthogonal to the axial direction. A force mainly in the direction perpendicular to the surface of the moving member (direction parallel to the axis of the holding member) is transmitted to the moving member. In other words, almost no force is transmitted obliquely to the surface of the moving member. Therefore, the holding member, that is, the entire bearing device is prevented from being twisted by the abutment of the drive member, and the bearing device stably performs the release action for a long period of time. Further, as in the embodiment, the rolling member is interposed between the moving member and the holding member, and the rolling member is provided with means for holding the lubricant, the moving member can move more smoothly, and the bearing Twist of the device is better prevented.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention, and FIG.
FIG. 3 is a sectional view taken along line II-II in FIG. 3, FIG. 3 is a front view of relevant parts showing a related art of the present invention, and FIG. 4 is a side view (right half omitted) showing another embodiment of the present invention. FIG. 5 is a front view showing one main part of a conventional example. [Explanation of symbols for main parts] 30 …… Clutch release bearing 34 …… Contact part 35 …… Diaphragm spring 40 …… Bearing holding means, 42 …… Sleeve 45 …… Guide shaft, 48 …… Anvil 56 …… Case, 62 …… Cage 64 …… Roller, 66 …… Guide plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliographic reference Sho 53-15239 (JP, U) Actual 62-153427 (JP, U)

Claims (4)

[Claims] 1. A clutch release bearing including a contact portion that comes into contact with a diaphragm spring of a clutch device in a vehicle, and a clutch release bearing that holds the clutch release bearing and is movably mounted on a guide shaft of a transmission device in an axial direction. And a holding member that is axially driven by a driving portion of a driving member that is pivotally supported by a pivot that extends parallel to a direction orthogonal to the axis, and that holds a contact portion of the clutch release bearing with the diaphragm spring. In the release bearing device, a portion driven by the drive unit of the holding member is an annular anvil unit, and is abutted on the drive unit of the drive member between the anvil unit and the drive member. A ring-shaped moving member that is arranged between the moving member and the anvil portion. By the pivotal movement of the drive member, the moving member and the rolling element are movable in the axial direction of the guide shaft and in a plane orthogonal to the axis of the moving member, and the anvil portion is A clutch release bearing device designed to receive only axial force. 2. The clutch release bearing device according to claim 1, wherein a portion where the rolling element moves between the drive member and the anvil portion is filled with a lubricant. 3. The clutch release bearing device according to claim 1, further comprising a retainer for holding the rolling elements at a predetermined distance from each other. 4. The rolling element is a plurality of rollers, and an annular cage for holding the plurality of rollers so that their axes are parallel to each other is provided on an axial side surface of the anvil portion. The clutch release bearing device according to item 1 of the above.