JP2010156404A - Clutch release bearing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clutch release bearing device reduced in manufacturing cost and enabling downsizing of a clutch device, because of fewer parts mounted therein. <P>SOLUTION: The clutch release bearing device is equipped with: a first retaining member 40 wherein outer rings 22, 32 of a small diameter clutch release bearing 20 and a large diameter clutch release bearing 30 are formed of magnetic material, and which is axially slidably fitted on an outer circumference of a sleeve 11 comprising a guide shaft, and has a magnet 44; and a second holding member 50 axially slidably fitted on an outer circumference of the first retaining member 40 and having a magnet 54. The small diameter clutch release bearing 20 is movably held in the radial direction with respect to the first retaining member 40 by attraction of its outer ring 22 by magnetic force of the magnet 44 of the first retaining member 40, and the large diameter clutch release bearing 30 is movably held in the radial direction with respect to the second retaining member 50 by attraction of its outer ring 32 by magnetic force of the magnet 54 of the second holding member 50. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a clutch release bearing device, and more particularly to a clutch release bearing device for a double clutch device used in a double clutch transmission.

  In a clutch device using a friction plate mounted on a vehicle or the like, power transmission / reception is performed by pressing a diaphragm spring of a clutch cover in an axial direction with a shift fork as an input member. A clutch release bearing that allows relative rotation between the shift fork disposed on the fixed side of the vehicle body and the like and a diaphragm spring that is attached to a flywheel of the engine and rotates is provided.

  As a conventional double clutch device, an odd-numbered gear and an even-numbered gear clutch have large and small diameter clutch release bearings having different sizes on the same shaft, and the large diameter and small diameter clutch release bearings are clutches. Those that slide in the axial direction at the time of switching are known (see, for example, Patent Document 1).

JP 2002-174262 A

  However, the double clutch device described in Patent Document 1 includes large and small diameter clutch release bearings having different sizes, and each clutch release bearing has a front cover. Therefore, the structure is complicated and the manufacturing cost increases. In addition, a large installation space for the clutch release bearing is required, and it is difficult to reduce the size of the clutch device.

  The present invention has been made in view of the above-described circumstances, and a purpose thereof is a clutch release bearing device that can reduce the number of parts, reduce the manufacturing cost, and reduce the size of the clutch device. Is to provide.

The above object of the present invention can be achieved by the following constitution.
(1) An inner ring and an outer ring that are arranged concentrically and rotate relative to each other, one wheel is fixed, and the other wheel that rotates is in contact with the rotating member of the clutch device. A clutch release bearing device including a clutch release bearing, wherein an outer ring of a small diameter clutch release bearing and a large diameter clutch release bearing is formed of a magnetic material, and is externally fitted on a guide shaft so as to be axially slidable. And a second holding member that is externally fitted on the outer periphery of the first holding member so as to be axially slidable and has a magnet. The small-diameter clutch release bearing is a small-diameter clutch release bearing. When the outer ring is attracted by the magnetic force of the magnet of the first holding member, the outer ring is held so as to be movable in the radial direction with respect to the first holding member. By the outer ring of the over's bearing it is attracted by the magnetic force of the magnet of the second holding member, a clutch release bearing device characterized in that it is radially movably held with respect to the second holding member.
(2) The first holding member and the second holding member are formed of synthetic resin, the magnet of the first holding member is insert-molded on the first holding member, and the magnet of the second holding member is formed on the second holding member. The clutch release bearing device according to (1), wherein the clutch release bearing device is insert-molded.

  According to the clutch release bearing device of the present invention, the outer ring of the small diameter clutch release bearing and the large diameter clutch release bearing is formed of a magnetic material, and is externally fitted on the guide shaft so as to be axially slidable, and has a magnet. A first holding member and a second holding member externally fitted to the outer periphery of the first holding member so as to be axially slidable. The small diameter clutch release bearing includes an outer ring of the small diameter clutch release bearing. By being attracted by the magnetic force of the magnet of the first holding member, it is held so as to be movable in the radial direction with respect to the first holding member. In the large-diameter clutch release bearing, the outer ring of the large-diameter clutch release bearing is second-held. By being attracted by the magnetic force of the magnet of the member, it is held so as to be movable in the radial direction with respect to the second holding member. Therefore, in the conventional double clutch device, the large and small diameter clutch release shafts Can be omitted in one of the cover member were required for each. Thereby, since the number of parts can be reduced, manufacturing cost can be reduced. Moreover, since the installation space for one cover member can be eliminated, the clutch device can be downsized.

  Further, according to the clutch release bearing device of the present invention, the first holding member and the second holding member are made of synthetic resin, and the magnet of the first holding member is insert-molded to the first holding member, and the second holding member is formed. Since the magnet of the member is insert-molded in the second holding member, the first holding member and the second holding member having arbitrary shapes in which the magnet is arranged at a predetermined position can be easily formed.

  Hereinafter, an embodiment of a clutch release bearing device according to the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the clutch release bearing device 10 of the present embodiment is slidable in the axial direction on the outer periphery of a small diameter clutch release bearing 20, a large diameter clutch release bearing 30, and a sleeve 11 forming a guide shaft. A first holding member 40 that is externally fitted, and a second holding member 50 that is externally fitted to the outer periphery of the first holding member 40 so as to be axially slidable.

  The small-diameter clutch release bearing 20 includes an inner ring 21 having a contact portion 21a with a diaphragm spring (not shown) at the left end portion, an outer ring 22 having a flange portion 22a at the end opposite to the contact portion 21a, A plurality of balls 23 that are arranged so as to be able to roll between the inner ring 21 and the outer ring 22, a cage 24 that holds the balls 23 so that they can roll at a predetermined interval, and the inner ring 21 on the contact portion 21a side of the balls 23. And a seal 25 for sealing a bearing space defined by the outer ring 22. In the present embodiment, the outer ring 22 is a press outer ring formed by pressing a magnetic metal plate (magnetic material). Further, the flange portion 22 a is extended to the vicinity of the outer peripheral surface of the inner ring 21 facing the inner peripheral end thereof, and constitutes a seal that seals the bearing space together with the seal 25.

  The first holding member 40 is made of synthetic resin, and is fitted around the outer periphery of the sleeve 11 so as to be slidable in the axial direction, and in the vicinity of the axial end portion (left end portion in FIG. 1) of the cylindrical portion 41. A flange portion 42 extending radially outward from the outer periphery of the cylinder portion, a small diameter portion 43 formed on the outer side in the axial direction from the flange portion 42 of the cylindrical portion 41, and an insert on the surface of the flange portion 42 on the small diameter portion 43 side And a ring-shaped first magnet 44 embedded by molding.

  The small-diameter clutch release bearing 20 has the flange portion 22a of the outer ring 22 adsorbed by the magnetic force of the first magnet 44 of the first holding member 40, so that the flange portion 42 of the first holding member 40 has a radial direction. It is held movable. Further, in order to make the small diameter clutch release bearing 20 movable in the radial direction, a gap C1 is provided between the inner periphery of the inner ring 21 of the small diameter clutch release bearing 20 and the outer periphery of the small diameter portion 43 of the first holding member 40. It is done. As a result, the small-diameter clutch release bearing 20 can move in the radial direction by the gap C1.

  Accordingly, when the clutch is operated and the abutting portion 21a of the inner ring 21 abuts against a diaphragm spring (not shown), if both are eccentric, a centering force is generated in the small diameter clutch release bearing 20, and the small diameter clutch The release bearing 20 moves in the radial direction while being attracted by the magnetic force of the first magnet 44 and is automatically aligned.

  The large-diameter clutch release bearing 30 includes an inner ring 31 having a contact portion 31a with a diaphragm spring (not shown) at a left end portion, and an outer ring 32 having a flange portion 32a at an end opposite to the contact portion 31a. , A plurality of balls 33 that are arranged so as to be able to roll between the inner ring 31 and the outer ring 32, a cage 34 that holds the balls 33 in a rollable manner at a predetermined interval, and an inner ring on the contact portion 31a side of the balls 33 And a seal 35 that seals the bearing space defined by the outer ring 32 and the outer ring 32. In the present embodiment, the outer ring 32 is a press outer ring formed by pressing a magnetic metal plate (magnetic material). Further, the flange portion 32 a extends to the vicinity of the outer peripheral surface of the inner ring 31 facing the inner peripheral end, and constitutes a seal that seals the bearing space together with the seal 35. A small-diameter clutch release bearing 20 is disposed on the radially inner side of the inner ring 31 of the large-diameter clutch release bearing 30.

  The second holding member 50 is made of synthetic resin, and has a cylindrical portion 51 that is fitted on the outer periphery of the cylindrical portion 41 of the first holding member 40 so as to be axially slidable, and a diameter from a substantially central portion of the cylindrical portion 51. The flange portion 52 extending outward in the direction, the small-diameter portion 53 formed on the outer side in the axial direction from the flange portion 52 of the cylindrical portion 51, and the surface of the flange portion 52 on the small-diameter portion 53 side are embedded by insert molding. A ring-shaped second magnet 54.

  The large-diameter clutch release bearing 30 has a diameter on the flange portion 52 of the second holding member 50 by the flange portion 32 a of the outer ring 32 being attracted by the magnetic force of the second magnet 54 of the second holding member 50. It is held so that it can move in the direction. Further, in order to make the large-diameter clutch release bearing 30 movable in the radial direction, a gap C2 is provided between the inner periphery of the inner ring 31 of the large-diameter clutch release bearing 30 and the outer periphery of the small-diameter portion 53 of the second holding member 50. Is provided. As a result, the large-diameter clutch release bearing 30 can move in the radial direction by the gap C2.

  Therefore, when the clutch is operated and the contact portion 31a of the inner ring 31 is in contact with a diaphragm spring (not shown), if both are eccentric, a centering force is generated in the large-diameter clutch release bearing 30 and the large diameter is increased. The clutch release bearing 30 is automatically aligned by moving in the radial direction while being attracted by the magnetic force of the second magnet 54.

  As described above, according to the clutch release bearing device 10 of the present embodiment, the outer rings 22 and 32 of the small diameter clutch release bearing 20 and the large diameter clutch release bearing 30 are formed of a magnetic material, and the outer periphery of the sleeve 11 is formed. The first holding member 40 having the first magnet 44 and the outer periphery of the cylindrical portion 41 of the first holding member 40 are slidably fitted in the axial direction to the second magnet 54. A small-diameter clutch release bearing 20 is configured such that the flange portion 22a of the outer ring 22 is adsorbed by the magnetic force of the first magnet 44 of the first holding member 40, thereby holding the first holding member 50. The clutch release bearing 30 is held so as to be movable in the radial direction with respect to the member 40, and the flange portion 32 a of the outer ring 32 is attracted by the magnetic force of the second magnet 54 of the second holding member 50. Therefore, since the second holding member 50 is held so as to be movable in the radial direction, one of the cover members necessary for each of the large diameter and small diameter clutch release bearings in the conventional double clutch device may be omitted. it can. Thereby, since the number of parts can be reduced, manufacturing cost can be reduced. Moreover, since the installation space for one cover member can be eliminated, the clutch device can be downsized.

  Further, according to the clutch release bearing device 10 of the present embodiment, the first holding member 40 and the second holding member 50 are formed of synthetic resin, and the first magnet 44 is attached to the flange portion 42 of the first holding member 40. Since the second magnet 54 is insert-molded and insert-molded into the flange portion 52 of the second holding member 50, the first holding member having an arbitrary shape in which the first magnet 44 and the second magnet 54 are arranged at predetermined positions. 40 and the second holding member 50 can be easily formed.

In addition, this invention is not limited to what was illustrated to the said embodiment, In the range which does not deviate from the summary of this invention, it can change suitably.
For example, a metal anvil is embedded in a contact portion between the first holding member 40 and the second holding member 50 and a fork member (not shown), and the first fork 40 and the second holding member 50 are not shown. You may make it prevent the abrasion by contact with a member.

It is sectional drawing for demonstrating one Embodiment of the clutch release bearing apparatus which concerns on this invention.

Explanation of symbols

10 Clutch release bearing device 11 Sleeve (guide shaft)
20 Small-diameter clutch release bearing 21 Inner ring 22 Outer ring 30 Large-diameter clutch release bearing 31 Inner ring 32 Outer ring 40 First holding member 44 First magnet 50 Second holding member 54 Second magnet

Claims (2)

Large-diameter and small-diameter clutch release bearings that are arranged concentrically and have inner and outer rings that rotate relative to each other, one of which is fixed and the other wheel that rotates is in contact with the rotating member of the clutch device. A clutch release bearing device comprising:
The outer ring of the small diameter clutch release bearing and the large diameter clutch release bearing is formed of a magnetic material,
A first holding member externally fitted on the guide shaft so as to be axially slidable and having a magnet;
A second holding member externally fitted to the outer periphery of the first holding member so as to be axially slidable and having a magnet;
The small diameter clutch release bearing is held movably in the radial direction with respect to the first holding member by the outer ring of the small diameter clutch release bearing being attracted by the magnetic force of the magnet of the first holding member. ,
The large diameter clutch release bearing is movable in the radial direction with respect to the second holding member by adsorbing the outer ring of the large diameter clutch release bearing by the magnetic force of the magnet of the second holding member. A clutch release bearing device that is held. The first holding member and the second holding member are made of synthetic resin,
The magnet of the first holding member is insert-molded to the first holding member,
The clutch release bearing device according to claim 1, wherein the magnet of the second holding member is insert-molded in the second holding member.

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