JP2006090359A - Clutch release bearing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clutch release bearing device suppressing vibration, noise and early stage wear of an abutment part. <P>SOLUTION: Even if a guide shaft 9A inclined in relation to an axial line of a diaphragm spring tip axial line and so called misalignment angle component is generated, an outer member 21a and a flange part 22 rocks around an axle crossing perpendicularly to the axial line in relation to an inner member 21 of a guide sleeve 20, an inner ring 11 of the clutch release bearing retained by the same equally abuts on the tip 7a of the diaphragm spring 7 of a clutch device. Consequently, vibration, noise and early stage wear of the abutment part can be suppressed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a clutch release bearing device used for 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 spring force of the spring is pressed by pressing the diaphragm spring of the clutch cover in the axial direction with a release fork that is a release force input member. 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).
JP-A-9-1378378

  Here, when the transmission and the engine are connected, a so-called misalignment angle component in which the guide shaft is inclined with respect to the axis of the diaphragm spring tip may occur. In such a case, the diaphragm spring and the clutch release bearing may be offset against each other, thereby causing vibration, abnormal noise, and early wear of the contact portion.

  The present invention has been made in view of the problems of the prior art, and an object of the present invention is to provide a clutch release bearing device that can suppress vibration, abnormal noise, and early wear of a contact portion.

In order to achieve the above object, the clutch release bearing device of the present invention comprises:
The inner ring and the outer ring are arranged concentrically with each other and rotate relative to each other, and rolling elements that roll between the two wheels. One of the rings is fixed, and the other rotating wheel contacts the rotating member of the clutch device. A clutch release bearing, a cylindrical portion slidably fitted on the guide shaft, and a flange holding portion, and one ring of the clutch release bearing with respect to the bearing holding member In a clutch release bearing device comprising a connecting member that holds the shaft so as to be movable in the radial direction,
The cylindrical portion of the bearing holding member includes an outer member joined to a flange portion and an inner member slidable with respect to the outer member, and an outer peripheral surface of the inner member on which the outer member slides. Is a part of a spherical surface.

  According to the clutch release bearing device of the present invention, the cylindrical portion of the bearing holding member includes the outer member joined to the flange portion, and the inner member slidable with respect to the outer member. Since the outer peripheral surface of the inner member on which the member slides is a part of a spherical surface, when the guide shaft is inclined with respect to the axis of the diaphragm spring tip, a so-called misalignment angle component is generated. The outer member slides along the spherical surface with respect to the inner member and swings around an axis orthogonal to the axis, whereby the rotating wheel of the clutch release bearing held by the flange portion is a clutch device. It comes to contact | abut uniformly with respect to the diaphragm spring front-end | tip of this, and it can suppress a vibration, noise, and the early wear of a contact part.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing a state in which a clutch release bearing device according to an embodiment of the present invention is assembled to a clutch device. In FIG. 1, the clutch device mainly includes a clutch cover assembly 1 and a clutch disk 2.

  In the clutch housing H attached to the engine (not shown), the clutch cover assembly 1 is disposed inside the clutch cover 5 and the clutch cover 5 fixed to the flywheel 4 connected to the rear end of the crankshaft C. The pressure plate 6 and the diaphragm spring 7 are provided. The diaphragm spring 7 is supported by the clutch cover 5 at the center in the radial direction, and the vicinity of the outer peripheral edge presses the pressure plate 6 to the flywheel 4 side. Further, the diaphragm spring 7 is provided with a radial slit from a radially intermediate portion to an inner peripheral portion, and the inner peripheral end portion 7 a is in contact with the clutch release bearing device 3.

  The clutch disk 2 is configured such that a friction facing 2a, which is an outer peripheral portion, is sandwiched between the flywheel 4 and the pressure plate 6. A main drive shaft 9 on the transmission side is spline-engaged with the center of the clutch disk 2.

  A transmission (not shown) is disposed behind the clutch housing H (on the right side in FIG. 1). A rear portion of the main drive shaft 9 that is spline-engaged with the clutch disk 2 extends into the transmission. The clutch release bearing device 3 is arranged around the guide shaft 9 </ b> A and is arranged so as to be movable in the axial direction by being pushed by the release fork 8.

  FIG. 2 is a view of the clutch release bearing device 3 as viewed from the release fork side. FIG. 3 is an axial sectional view of the configuration of FIG. 2 taken along the line III-III and viewed in the direction of the arrows. FIG. 4 is a perspective view of the spring member.

  In FIG. 3, the clutch release bearing device 3 includes a clutch release bearing 10, a guide sleeve 20 that is a bearing holding member, a spring member 30 that is a connecting member, and a reinforcing member 40. The clutch release bearing 10 includes a substantially circular inner ring 11 having a contact portion 11 a at the left end, a double circular outer ring 12 concentrically including the inner ring 11, and the inner ring 11 and the outer ring 12. A space defined by a plurality of balls 15 that are arranged to roll freely, a cage 16 that holds the balls 15 at predetermined intervals, and an inner ring 11 and an outer ring 12 on both sides in the axial direction of the balls 15 is dustproof and oiltight. And seals 17 and 18 for sealing. The inner ring 11 is rotatably supported with respect to the outer ring 12. Further, the contact portion 11a of the inner ring 11 is configured to contact the diaphragm spring 7 of the clutch cover 5 shown in FIG.

  On the other hand, the guide sleeve 20 is made of molded resin, and has a tubular main body 21, a flange portion 22 that extends radially from the outer periphery near the center of the main body 21, and a radially outer periphery of the flange portion 22. A limiting portion 23 extending in the axial direction is formed.

  The main body 21 that is a cylindrical portion includes an outer member 21a that is integral with the flange portion 22, and an inner member 21b that is slidable with respect to the outer member 21a. The inner member 21b is arranged around the guide shaft 9A and slides in the axial direction relative to the guide shaft 9A. The inner peripheral surface 21c of the outer member 21a is a part of a spherical surface with its axis as the center, and the outer peripheral surface 21d of the inner member 21b is a part of a spherical surface having the same curvature, and therefore the outer member 21a. When the inner member 21b is fitted to the inner member 21b, the outer peripheral surface 21d slides with respect to the inner peripheral surface 21c, so that the outer member 21a and the flange portion 22 can rotate around any axis orthogonal to the axis. Is swingable.

  An enlarged diameter portion 24 is provided on the inner side of the inner member 21b. The enlarged diameter portion 24 functions so as not to bite foreign matter when the main body 21 slides. Further, a gap 27 is formed between the restricting portion 23 and the outer ring 12 so that the clutch release bearing 10 can be moved in the radial direction.

  As is clear from FIG. 2, 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. As shown in FIG. 4, 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, and the base portion 31 and the pressing portion 32. And a beam portion 33 for applying an elastic force for urging the outer ring 12 to the pressing portion 32. 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.

  Further, 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 this convex portion 34 is an end of the flange portion 22 (FIG. 3) of the guide sleeve 20. It is engaged with the portion 22h. Further, a notch 37 is formed in the vicinity of the lower end of both side portions 31 a of the base portion 31, and a rectangular opening 38 is formed at the center of the base portion 31.

  In FIG. 3, the reinforcing member 40 includes a cylindrical portion 41 and a disc-shaped anvil portion 42 connected to the cylindrical portion 41, and is formed by pressing a relatively thick plate and then quenching. Is done. Thereby, remarkable wear does not occur at the contact portion with the release fork 8 (FIG. 1) as the input member. Moreover, remarkable wear can be prevented by coating the anvil part 42 with titanium or the like. The cylindrical portion 41 has an inner diameter that just fits into the main body 21 when attached to the guide sleeve 20, whereby radial positioning of the reinforcing member 40 is achieved.

  When the clutch release bearing device 3 is assembled, the clutch release bearing 10 and the reinforcing member 40 are disposed around the main body 21 of the guide sleeve 20, and then the two springs from the diagonally upper right and the diagonally lower right in FIG. The member 30 is inserted. Since the spring member 30 can be inserted from one direction of the outer periphery, the assembly is easy. The spring member 30 climbs over the axial protrusion 22c provided on the flange portion 22 of the guide sleeve 20 while being elastically deformed, the notch 37 engages with the protrusion 22c, and the opening 38 engages with the flange portion 22 of the guide sleeve 20. The assembly is completed by abutting against the provided stopper 22g.

  Next, operations of the clutch device and the clutch release bearing device according to the embodiment of the present invention will be described below. When the driver depresses the clutch pedal, the release fork 8 shown in FIG. 1 pivots, and the tip of the release fork 8 abuts on the anvil portion 42 of the reinforcing member 40 of the clutch release bearing device 3 to apply a certain load. (FIG. 2). Since the plate thickness of the reinforcing member 40 is relatively thick and its rigidity is sufficient, a large load received from the release fork 8 can be supported. Although the release fork 8 and the anvil part 42 are in sliding contact, as described above, since the anvil part 42 is coated or quenched with titanium or the like, wear is suppressed to a small level.

  In FIG. 1, the clutch release bearing device 3 slides in the axial direction on the guide shaft 9 </ b> A in response to an input from the release fork 8, and the diaphragm spring 7 (rotary member of the clutch device) supported by the clutch cover 5 is attached to the inner ring. 11 abutment portions 11a are brought into contact. Even if the diaphragm spring 7 is rotating, the inner ring 11 is rotatable, so that it rotates integrally with the diaphragm spring 7 after contact. Further, when the bearing device 3 moves in the axial direction, the diaphragm spring 7 is pressed and the pressure plate 6 is separated from the flywheel 4, so that the relative rotation of the flywheel 4 and the clutch plate 2 is allowed. The transmission of power from the transmission to the transmission, that is, the clutch operation is performed.

  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 clutch release bearing 10 is movable in the radial direction with respect to the guide sleeve 20. Accordingly, when the abutting portion 11a of the inner ring 11 abuts against the diaphragm spring, if there is an eccentricity between the two, a known force is generated to cause the clutch release bearing 10 to be located concentrically, thereby causing the clutch release bearing. 10 moves in the radial direction, and self-alignment is achieved. In the present embodiment, the restricting portion 23 has a function of restricting the clutch release bearing 10 from moving outward in the radial direction by a predetermined amount or more.

  Further, according to the present embodiment, even when the guide shaft 9A is inclined with respect to the axis of the diaphragm spring tip and a so-called misalignment angle component is generated, the guide shaft 9A is in contact with the inner member 21b of the guide sleeve 20. The outer member 21a and the flange portion 22 are swung around an axis perpendicular to the axis, so that the inner ring 11 of the clutch release bearing held by the outer member 21a and the flange portion 22 is even with respect to the tip 7a of the diaphragm spring 7 of the clutch device. Thus, vibration, abnormal noise, and early wear of the contact portion can be suppressed.

  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 modified or improved as appropriate.

It is sectional drawing shown in the state which assembled | attached the clutch release bearing apparatus which is embodiment of this invention to the clutch apparatus. It is the figure which looked at the clutch release bearing device which is this Embodiment from the release fork side. FIG. 3 is an axial sectional view of the configuration of FIG. 2 taken along line III-III and viewed in the direction of the arrow. It is a perspective view of a spring member.

Explanation of symbols

3 Clutch release bearing device 10 Clutch release bearing 20 Guide sleeve 30 Spring member 40 Reinforcing member

Claims (1)

The inner ring and the outer ring are arranged concentrically with each other and rotate relative to each other, and rolling elements that roll between the two wheels. One of the rings is fixed, and the other rotating wheel contacts the rotating member of the clutch device. A clutch release bearing, a cylindrical portion slidably fitted on the guide shaft, and a flange holding portion, and one ring of the clutch release bearing with respect to the bearing holding member In a clutch release bearing device comprising a connecting member that holds the shaft so as to be movable in the radial direction,
The cylindrical portion of the bearing holding member includes an outer member joined to a flange portion and an inner member slidable with respect to the outer member, and an outer peripheral surface of the inner member on which the outer member slides. Is a part of a spherical surface, a clutch release bearing device.

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