JP2006029375A - Clutch releasing bearing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clutch releasing bearing device whose reliability can be sustained over the long term while preserving its low price. <P>SOLUTION: A release fork is guided not by a reinforcing member 40 but by a flat part 21a of a guide sleeve 21, so that a shape of the reinforcing member 40 can be simplified to permit its cost to be reduced. Further, the guide sleeve 21 is made of resin, so that the flat part 21a can be easily formed with high dimensional precision. Furthermore, the release fork and the flat part 21a are in contact with each other in the form of metallic and resinous contact, so that excellent sliding performance is essentially given. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a clutch release bearing device used in a vehicle or the like.

  When operating a clutch that is a power interrupting device mounted on a vehicle or the like using a friction plate, the release fork that is an input member presses the diaphragm spring of the clutch cover that is a rotating member in the axial direction, thereby The urging force is released from the friction plate to disconnect the power transmission.

By the way, the release 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, when the release fork directly presses the diaphragm spring of the clutch cover, wear of the contact portion is caused. Therefore, a clutch release bearing including a rotating wheel that abuts on the diaphragm spring and rotates integrally, and a non-rotating bearing holding member configured to hold the bearing in a predetermined state and receive an input from the release fork, A clutch release bearing device is provided between a diaphragm spring and a release fork (see Patent Document 1).
Japanese Patent Laid-Open No. 9-137837

  Here, in the clutch release bearing device disclosed in Patent Document 1, a steel anvil plate is fitted into a guide sleeve, and a guide surface of a release fork is formed on the outer peripheral surface thereof. However, since the guide surface of the release fork is formed on the anvil plate by press drawing, if the anvil shape is complicated, the flatness as the guide surface of the release fork cannot be sufficiently secured, and the cost increases. There is a problem. Furthermore, since the release fork and the guide surface of the anvil portion are in contact with each other, it may be necessary to strictly manage the lubrication state in order to ensure slidability.

  The present invention has been made in view of the problems of the prior art, and an object thereof is to provide a clutch release bearing device that is inexpensive and can maintain reliability over a long period of time.

In order to achieve the above object, the clutch release bearing device of the present invention comprises:
The inner ring and the outer ring that are arranged concentrically and rotate relative to each other, the rolling element that rolls between the two wheels, and the cage that holds the rolling element, one ring is fixed, and the other wheel that rotates is A resin-made bearing holding member including a clutch release bearing that comes into contact with a rotating member of the clutch device, a cylindrical portion that is slidably fitted on the guide shaft, and a flange portion, and the bearing holding In a clutch release bearing device comprising a connecting member that holds one ring of the clutch release bearing so as to be movable in a radial direction with respect to the member,
The cylindrical portion of the bearing holding member is characterized in that a guide surface for guiding the swinging release fork is formed on the outer peripheral surface.

  According to the clutch release bearing device of the present invention, the cylindrical portion of the bearing holding member has a guide surface for guiding the swinging release fork on the outer peripheral surface, so that the shape of the anvil portion can be simplified and reduced. Cost can be reduced. Further, since the bearing holding member is made of resin, it can be formed relatively easily even with a complicated shape. For example, it is easy to ensure a flat shape of the guide surface of the release fork with high accuracy. Moreover, since the release fork and the guide surface are in contact with metal and resin, there is an advantage that the slidability is inherently excellent.

  The guide surface is preferably a flat surface.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a view of the clutch release bearing device according to the present embodiment as viewed from the release fork side. FIG. 2 is an axial sectional view of the clutch release bearing device of FIG. 1 cut along the line II-II and viewed in the direction of the arrow. FIG. 3 is a perspective view of the spring member.

  In FIG. 2, the clutch release bearing device includes a clutch release bearing 10, a guide sleeve 20 that is a bearing holding member, and a spring member 30 that is a connecting member. The clutch release bearing 10 includes an outer ring 12, an inner ring 11 having an inner ring flange portion 11a extending radially inward at the left end in FIG. 2 and concentrically enclosed by the outer ring 12, the inner ring 11 and the outer ring. A ball 15 that is a plurality of rolling elements arranged so as to be freely rollable between the ball 12, a cage 16 that holds the balls 15 at predetermined intervals, and a ball 15 that is provided on both sides of the ball 15 in the direction of dust and oil tightly It consists of seals 17 and 18 that exert a sealing function.

  On the other hand, the guide sleeve 20 is made of resin, and has a cylindrical main body 21 that is a cylindrical portion, and a flange portion 22 that extends in the radial direction from the outer periphery near the center of the main body 21. A guide shaft (not shown) extends inside the main body 21, and the main body 21 is slidable on the guide shaft. An enlarged diameter portion 24 is provided inside the main body 21. The enlarged diameter portion 24 functions so as not to bite foreign matter when the main body 21 slides on the guide shaft. The main body 21 forms a pair of flat portions 21a parallel to each other on the outer peripheral surface. The flat portion 21a serves as a guide surface for guiding a bifurcated release fork (not shown).

  As is apparent from FIG. 1, the two spring members 30 having the same shape have a function of attaching the clutch release bearing 10 to the guide sleeve 20. The spring member 30 is formed by punching a sheet of spring steel such as SK5 with a press, bending it, and then quenching it. The spring member 30 is provided between the base portion 31 that contacts the flange portion of the guide sleeve 20, the pressing portion 32 that contacts the outer ring 12 of the bearing, the base portion 31 and the pressing portion 32, and the pressing portion 32. And a beam portion 33 for applying an elastic force for urging the outer ring 12. The pressing portion 32 has an inclined portion 32a inclined outward so as not to contact the seal 17 and to facilitate the assembly of the spring member 30.

  The spring member 30 has a convex portion 34 formed so as to protrude in the radial direction substantially in the middle of the beam portion 33, and the convex portion 34 is an end portion of the flange portion 22 (FIG. 1) of the guide sleeve 20. 22h is engaged. Further, the spring member 30 is formed with a notch 37 in the vicinity of the lower end of both side portions 31 a of the base portion 31, and a relatively large central notch 38 is formed at the center of the base portion 31.

  The substantially disc-shaped reinforcing member 40 includes a flange portion 41 that is in close contact with the flange portion 22 of the guide sleeve 20 and an anvil portion 2 that receives an input of a release fork (not shown), and is a relatively thin plate. Is formed by pressing and then quenching. This prevents significant wear from occurring at the contact portion with the release fork.

  When assembling the clutch release bearing device, the clutch release bearing 10 is disposed around the main body 21 of the guide sleeve 20, and then the two spring members 30 are inserted from the inner side in the radial direction of the main body 21. The spring member 30 passes over the axial projection 22c provided on the flange portion 22 of the guide sleeve 20 while being elastically deformed, the notch 37 engages with the projection 22c, and the central notch 38 has the flange portion 22 of the guide sleeve 20. Assembling is completed by abutting against the stopper 22g provided on the surface. At this time, the spring member 30 clamps the flange portion 22 and the outer ring 12 in the axial direction by the elastic force.

  Next, the operation of the clutch release bearing device according to the embodiment of the present invention will be described below. In FIG. 2, a release fork (not shown) pivots, and its tip abuts against the flange portion 22 of the guide sleeve 20 via the anvil portion 42 of the reinforcing member 40 to apply a constant load. The clutch release bearing device slides in the axial direction on a guide shaft (not shown) by an input from a release fork, and a diaphragm spring (rotating member of the clutch device) of a clutch cover (not shown) contacts the inner ring flange portion 11a of the inner ring 11. Make contact. Even if the diaphragm spring is rotating, the inner ring 11 is freely rotatable, so that it rotates integrally with the diaphragm spring after contact, and the diaphragm spring is pressed as the bearing device moves in the axial direction, so that the clutch is It is supposed to be operated.

  Since the spring member 30 has an appropriate plate thickness and supports the clutch release bearing 10 with respect to the guide sleeve 20 only by the frictional force acting between the pressing portion 32 and the outer ring 12, the bearing 10 The guide sleeve 20 can be moved in the radial direction. Therefore, when the inner ring flange portion 11a of the inner ring 11 is in contact with the diaphragm spring, if there is an eccentricity between the two, a known force is generated to place the bearing 10 concentrically, thereby causing the bearing 10 to move in the radial direction. The self-alignment will be achieved.

  According to the present embodiment, the release fork is guided not by the reinforcing member 40 but by the flat portion 21a of the guide sleeve 21, so that the shape of the reinforcing member 40 can be simplified and the cost can be reduced. Further, since the guide sleeve 21 is made of resin, the flat portion 21a can be easily formed with high accuracy. Further, since the release fork and the flat surface 21a are in contact with metal and resin, they are inherently excellent in slidability.

  The present invention has been described above with reference to the embodiments. However, the present invention should not be construed as being limited to the above-described embodiments, and can be changed or improved as appropriate.

It is the figure which looked at the clutch release bearing device concerning this embodiment from the release fork side. FIG. 2 is an axial sectional view of the clutch release bearing device of FIG. 1 cut along the line II-II and viewed in the direction of the arrow. 3 is a perspective view of a spring member 30. FIG.

Explanation of symbols

10 Clutch release bearing 20 Guide sleeve 30 Spring member 40 Cage

Claims (2)

The inner ring and the outer ring that are arranged concentrically and rotate relative to each other, the rolling element that rolls between the two wheels, and the cage that holds the rolling element, one ring is fixed, and the other wheel that rotates is A resin-made bearing holding member including a clutch release bearing that comes into contact with a rotating member of the clutch device, a cylindrical portion that is slidably fitted on the guide shaft, and a flange portion, and the bearing holding In a clutch release bearing device comprising a connecting member that holds one ring of the clutch release bearing so as to be movable in a radial direction with respect to the member,
The clutch release bearing device according to claim 1, wherein the cylindrical portion of the bearing holding member is formed with a guide surface on the outer peripheral surface for guiding the swinging release fork. The clutch release bearing device according to claim 1, wherein the guide surface is a flat surface.

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