JP2004011832A - Clutch release bearing device - Google Patents

Abstract

An object of the present invention is to provide a clutch release bearing device capable of suppressing generation of abnormal noise despite its low cost.
The noise generation during the operation of the clutch release bearing device can be effectively suppressed. On the other hand, the disk portion (43) is flat and the projection (22f) is made of resin. Is easily elastically deformed even if it is larger than the notch 43a, so that the protrusion 22f and the notch 43a can be engaged by merely pushing the protrusion 22f and the notch 43a in the direction close to each other with the hand of an operator. Excellent.
[Selection diagram] Fig. 4

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a clutch release bearing device used for a vehicle or the like.
[0002]
[Prior art]
When operating a clutch, which is a power interrupting device using a friction plate, mounted on a vehicle or the like, the diaphragm fork of the clutch cover, which is a rotating member, is pressed in an axial direction by a release fork, which is an input member. The urging force is released from the friction plate to disconnect the power transmission.
[0003]
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 the 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 against a diaphragm spring and integrally rotates, and a non-rotating bearing holding member that holds the bearing in a predetermined state and receives an input from a release fork. Is provided between the diaphragm spring and the release fork (for example, see JP-A-11-315855).
[0004]
In the clutch release bearing device disclosed in JP-A-11-315855, the tip of the inner ring of the bearing faces the diaphragm spring, while the rear end of the outer ring of the bearing moves radially to the flange of the guide sleeve. Mounted freely. When the flange of the guide sleeve is pushed from the rear by the tip of the release fork, the entire bearing device is movable in the axial direction so that the tip of the inner ring comes into contact with the diaphragm spring.
[0005]
[Problems to be solved by the invention]
In the case of such a clutch release bearing device according to the related art, a configuration capable of withstanding a large load from a release fork is realized by attaching a steel anvil to a resin sleeve. Also, by pressing a bent portion provided on the anvil into a notch provided on the sleeve, or by pressing a convex portion provided on the sleeve into a concave portion provided on the anvil, the relative position between the anvil and the sleeve during operation can be improved. Rotation is suppressed.
[0006]
However, in order to press-fit the bent portion of the anvil into the notch of the sleeve, it is necessary to control the dimensions of the anvil and the sleeve with high precision, and jigs and devices for press-fitting are also required. Increase. However, if the bent portion of the anvil or the cutout of the sleeve is omitted, a problem such as an abnormal noise due to the relative rotation of the both occurs.
[0007]
The present invention has been made in view of the problems of the related art, and has as its object to provide a clutch release bearing device that can suppress occurrence of abnormal noise despite its low cost.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the clutch release bearing device of the present invention
A clutch release bearing including an inner ring and an outer ring concentrically arranged and rotating relative to each other, one of which is fixed and the other of which rotates is in contact with a rotating member of the clutch device; A resin-made bearing holding member having a cylindrical portion slidably fitted to the housing and a flange portion, and the one ring of the clutch release bearing can be moved in the radial direction with respect to the bearing holding member. A reinforcing member having an anvil portion provided between the input member for inputting a clutch release force and the flange portion and for providing the clutch release force from the input member to the flange portion. In the clutch release bearing device consisting of
A protrusion formed on the flange portion or the reinforcing member is engaged with a notch formed on the reinforcing member or the flange portion, thereby preventing relative displacement between the bearing holding member and the reinforcing member. It is characterized by that.
[0009]
[Action]
According to the clutch release bearing device of the present invention, the protrusion formed on the flange portion or the reinforcing member is engaged with the notch formed on the reinforcing member or the flange portion. The projection can be easily engaged with the notch without causing any relative displacement between the bearing holding member and the reinforcing member around the axis of the cylindrical portion. It can be suppressed effectively.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a view of a clutch release bearing device according to an embodiment of the present invention as viewed from a release fork side. FIG. 2 is an axial sectional view of the clutch release bearing device of FIG. 1 taken along line II-II and viewed in the direction of the arrow.
[0011]
In FIG. 2, the clutch release device includes a clutch release bearing 10, a guide sleeve 20 as a bearing holding member, a spring member 30 as a connecting member, and a reinforcing member 40. The clutch release bearing 10 includes a substantially tubular inner ring 11 having a contact portion 11a at the left end, a short tubular outer ring 12 concentrically enclosing the inner ring 11, and rolling between the inner ring 11 and the outer ring 12. A space defined by a plurality of balls 15 movably arranged, a retainer 16 holding the balls 15 at predetermined intervals, and an inner ring 11 and an outer ring 12 on both axial sides of the balls 15 is made dust-tight and oil-tight. It comprises seals 17 and 18 for sealing. The inner race 11 is rotatably supported by the outer race 12. The abutment portion 11a of the inner race 11 abuts on a diaphragm spring of a clutch cover (not shown).
[0012]
On the other hand, the guide sleeve 20 is made of a resin, and has a cylindrical main body 21, a flange portion 22 extending in a radial direction from an outer periphery near a center of the main body 21, and an axial direction at a radially outer end of the flange portion 22. The outer wall portion 23 protrudes leftward, and the guide portion 25 (FIG. 1) protrudes rightward in the axial direction in FIG. 2 at the radially outer end of the flange portion 22. A guide shaft (not shown) extends inside the main body 21, 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. The outer wall portion 23 is provided outside the clutch release bearing 10 and serves as a radial movement restricting portion. A gap 27 is formed between the outer periphery of the outer race 12 and the inner periphery of the outer wall 23 so that the clutch release bearing 10 can be moved in the radial direction. The guide portion 25 has a function of a guide when the spring member 30 is assembled, and extends along both sides of the spring member 30 in the axial direction. Further, the outer ring 12 is formed by cutting and quenching the JIS standard SUJ2 as a material, but may be formed by pressing a plate material.
[0013]
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. 3 is a perspective view of the spring member 30. The spring member 30 is formed by punching a single spring steel plate such as SK5 by 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.
[0014]
Further, the spring member 30 has a concave portion 34 which is recessed upward at the center lower surface of the beam portion 33, and the concave portion 34 has a convex portion 22 h (FIG. 2) formed on the flange portion 22 of the guide sleeve 20. It is designed to engage. A notch 37 forming a recess is formed near the lower end of both sides 31 a of the base 31, and a relatively large rectangular opening 38 is formed near the center of the base 31.
[0015]
FIG. 4 is a perspective view of the reinforcing member 40. The reinforcing member 40 includes a cylindrical portion 41, a step-like anvil portion 42 protruding upward and downward in FIG. 4 from substantially the center of the cylindrical portion 41, and a flat plate-shaped member extending in the radial direction from the end of the cylindrical portion 41. The disk 43 is formed by pressing a relatively thin plate, followed by quenching. This prevents remarkable wear from occurring at the contact portion with the shift fork.
[0016]
The cylindrical portion 41 has a diameter that just fits into the main body 21 when attached to the guide sleeve 20, so that the positioning of the reinforcing member 40 in the radial direction is achieved.
[0017]
The disk member 43 of the reinforcing member 40 has a pair of rectangular cutouts 43a formed at 180 degrees in the circumferential portion thereof. The cutouts 43a are located at positions corresponding to the flange portions 22 of the guide sleeve 20 at the time of mounting. It engages with the formed projection 22f (shown by a dashed line in FIG. 4). In the circumferential portion of the disk portion 43, at the position where the spring member 30 is attached in the state shown in FIG. 1, as shown in FIG. 4, an engagement notch 43b through which the projection 22c and the stopper 22g (FIG. 1) pass. And a locking portion 43c.
[0018]
FIG. 5 is a view of the configuration of FIG. 1 cut along the line V-V and viewed in the direction of the arrow, and FIG. 6 is a view of the configuration of FIG. 1 cut along the line VI-VI and viewed in the direction of the arrow. is there. In this embodiment, the gap Δ1 between the projection 22f and the notch 43a (in the direction around the axis of the guide sleeve 20) in FIG. 5 and the gap Δ2 between the projection 22f and the notch 43a (in the radial direction of the guide sleeve 20) in FIG. It is almost zero. Therefore, relative rotational displacement and shift displacement (rattle) between the guide sleeve 20 and the reinforcing member 40 are effectively suppressed, and thereby, generation of abnormal noise during operation of the clutch release bearing device can be effectively suppressed. On the other hand, since the disk portion 43, which is a flat plate portion, has a flat plate shape and the projection 22f is made of resin, the projection 22f is easily elastically deformed even if the projection 22f is larger than the notch 43a. Can be engaged simply by pushing in the direction of approach by the operator's hand without depending on press-fitting, and therefore, the assembling property is excellent. If the chamfered portion 43d is formed on the outer edge of the protrusion 22f in the mounting direction, the mounting can be performed more easily.
[0019]
Further, the protrusion 22c of the guide sleeve 20 and the stopper 22g pass through the engagement notch 43b formed in the disk portion 43. When the spring member 30 is attached to the guide sleeve 20, the stopper 22 g, which is a rectangular protrusion formed near the protrusion 22 c in the flange portion 22, is formed in the rectangular opening 38 of the spring member 30, as is apparent from FIG. Engagement serves to prevent the spring member 30 from being pushed further inward.
[0020]
Next, the operation of the clutch release bearing device according to the embodiment of the present invention will be described below. In FIG. 2, when a release fork (not shown) pivots, its tip comes into contact with an anvil portion 42 (a region shown by cross-hatching in FIG. 1) of the reinforcing member 40 to apply a constant load. Since the reinforcing member 40 is relatively thick and has sufficient rigidity, it can receive a large load transmitted from the release fork. The clutch release bearing device slides in the axial direction on a guide shaft (not shown) in response to an input from a release 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 rotates, the inner ring 11 is rotatable, so that the inner ring 11 rotates together with the diaphragm spring after contact, and the bearing device moves in the axial direction, so that the diaphragm spring is pressed and the clutch is disengaged. It is to be operated.
[0021]
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 is The guide sleeve 20 is movable in the radial direction. Therefore, 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 bearing 10 concentrically occurs, whereby the bearing 10 moves in the radial direction. And self-centering will be achieved. The outer wall 23 of the guide sleeve 20 has a function of restricting the bearing 10 from moving outward in the radial direction by a predetermined amount or more. Further, since the outer ring of a general ball bearing does not have a flange in many cases, 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.
[0022]
As described above, the present invention has been described with reference to the embodiments. However, the present invention should not be construed as being limited to the above-described embodiments, and it is needless to say that modifications and improvements can be made as appropriate. For example, a protrusion may be provided on the reinforcing member side, and a notch may be provided on the guide sleeve side.
[0023]
【The invention's effect】
According to the clutch release bearing device of the present invention, the protrusion formed on the flange portion or the reinforcing member is engaged with the notch formed on the reinforcing member or the flange portion. The protrusion can be easily engaged with the notch, thereby preventing relative displacement between the bearing holding member and the reinforcing member around the axis of the cylindrical portion. It can be suppressed effectively.
[Brief description of the drawings]
FIG. 1 is a view of a clutch release bearing device according to an embodiment viewed from a release fork side.
FIG. 2 is an axial sectional view of the clutch release bearing device of FIG. 1 taken along the line II-II and viewed in the direction of the arrow.
FIG. 3 is a perspective view of a spring member 30.
FIG. 4 is a perspective view of a reinforcing member 40.
FIG. 5 is a view of the configuration of FIG. 1 cut along a line VV and viewed in a direction of an arrow.
FIG. 6 is a view of the configuration of FIG. 1 cut along a line VI-VI and viewed in a direction indicated by an arrow.
[Explanation of symbols]
Reference Signs List 10 clutch release bearing 20 guide sleeve 30 spring member 40 reinforcing member

Claims (1)

A clutch release bearing including an inner ring and an outer ring concentrically arranged and rotating relative to each other, one of which is fixed and the other of which rotates is in contact with a rotating member of the clutch device; A resin-made bearing holding member having a cylindrical portion slidably fitted to the housing and a flange portion, and the one ring of the clutch release bearing can be moved in the radial direction with respect to the bearing holding member. A reinforcing member having an anvil portion provided between the input member for inputting a clutch release force and the flange portion and for providing the clutch release force from the input member to the flange portion. In the clutch release bearing device consisting of
A protrusion formed on the flange portion or the reinforcing member is engaged with a notch formed on the reinforcing member or the flange portion, thereby preventing relative displacement between the bearing holding member and the reinforcing member. A clutch release bearing device.

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