JPH1163012A - Clutch release bearing device and disc spring for the bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the biting of a disc spring into the inner diameter portion of a jig for the disc spring when assembling the disc spring therein. SOLUTION: A disc spring 4 elastically thrusts an outer ring collar 3b1 against the side plate 2 of a sleeve 1 to hold a ball bearing 3 to be freely aligned. It is formed into a cylindrical shape with a small diameter portion 40 engageable with an engagement groove 1c in the outer periphery 1a of the sleeve 1 and elastically reducible and a large diameter portion 41 pressed in contact against the outer ring collar 3b1 of the ball bearing 3. The small diameter portion 40 of the disc spring 4 is formed into such a shape that a difference between the radius of the inscribed circle and the diameter of the circumscribed circle is larger than the thickness thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch release bearing device incorporated between an engine and a transmission, and more particularly, to a self-aligning clutch release bearing device that allows misalignment between an engine and a transmission. The present invention relates to a disc spring used in a bearing device.

[0002]

2. Description of the Related Art A clutch release bearing device is incorporated between an engine of a manual transmission vehicle and a transmission, and slides on a front cover protruding from the transmission in accordance with operation of a clutch pedal to turn on a clutch. It has a function to switch / OFF. This bearing device includes a substantially cylindrical resin sleeve, a side plate with which a clutch fork comes in contact, a ball bearing which is slidably contacted with the side plate, and a disc spring interposed between the ball bearing and the sleeve. Are the main components.

[0003] Among the above components, a disc spring (4) is
As shown in FIG. 8, an annular base (4a) provided at the large diameter end and a plurality of notches formed at equal intervals from the small diameter end as shown in FIG. This is a substantially conical steel plate press-formed product having a notch (4b) and a plurality of tongue pieces (4c) formed between adjacent notches (4b).

As shown in FIG. 9, the assembly of the bearing device is performed by assembling an assembly of a ball bearing (3) and a disc spring (4) from a clutch side end (upward in the drawing) to a sleeve (1).
And a cylindrical jig (5) is inserted between the ball bearing (3) and the sleeve (1), and the small-diameter end of the disc spring (4) is attached to the end face of the jig (5). 40) The flange (3b1) of the outer ring (3b) of the ball bearing (3) with the (tip of the tongue piece 4c) in contact with it
Is pressed against the end face (2a) of the side plate (2), and the disc spring (4)
This is performed by pushing the jig (5) until the tongue piece (4c) fits into the annular engagement groove (1c) provided on the outer peripheral surface of the sleeve (1). The disc spring (4) incorporated in this manner presses the ball bearing (3) against the side plate (2) with a predetermined urging force, and holds the ball bearing (3) freely and with a predetermined centering drag.

[0005]

In order to reduce the size of the clutch release bearing, it is necessary to reduce the annular clearance between the ball bearing (3) and the sleeve (1). In this case, the thickness of the jig (5) also needs to be reduced according to the width of the gap. However, as the thickness of the jig is reduced, as shown in FIG. The distal end portion (small diameter portion 40) of the disc spring (4) can easily bite into the provided chamfered portion (5b). If such biting occurs, it is difficult to push the assembly any further, and the assembling workability deteriorates.

Accordingly, an object of the present invention is to prevent the disc spring from biting into the inner diameter of the jig when the disc spring is press-fitted.

[0007]

In order to achieve the above object, the present invention provides an inner ring in contact with a rotating member of a clutch device, an outer ring having an inward outer ring flange, and a plurality of inner rings interposed between the inner ring and the outer ring. A ball bearing having a ball and a side plate extending to the outer diameter side, can be slid in the axial direction on the front cover of the transmission by the operation of the release fork, and the inner ring of the ball bearing is radially mounted on the outer periphery thereof. A cylindrical sleeve having a resin sleeve inserted with a gap, a small-diameter portion engaged with the outer peripheral surface of the sleeve, and a large-diameter portion pressed against the outer ring flange of the ball bearing. And a disc spring that elastically presses the ball bearing so as to be able to align the ball bearing. The difference between the inscribed circle radius and the circumscribed circle radius of the small diameter portion of the disc spring is the thickness of the small diameter portion. Shape that is larger than And the (claim 1).

In addition, a coned disk spring according to the present invention includes a ball bearing having an inner ring in contact with a rotating member of a clutch device, an outer ring having an inwardly directed outer ring flange, and a plurality of balls interposed between the inner ring and the outer ring. , Having a side plate extending to the outer diameter side, which can be slid in the axial direction on the front cover of the transmission by the operation of the release fork, and the inner ring of the ball bearing is externally inserted with a radial gap around its outer periphery. And a cylindrical spring having a small-diameter portion engaged with the outer peripheral surface of the sleeve, and a large-diameter portion pressed against the outer ring flange of the ball bearing. None, in those in which the outer ring flange is elastically pressed against the side plate of the sleeve to hold the ball bearing in an alignable manner, the difference between the inscribed circle radius and the circumscribed circle radius of the small diameter portion is the same as that of the small diameter portion. Greater than wall thickness It is obtained by a shape as Kunar (claim 3).

[0009] More specifically, the coned disk spring has an annular base having the large-diameter portion at one end and a plurality of tongues having a small-diameter portion at the distal end, the diameter of which is reduced from the other end of the annular base. It can be composed of a piece (claims 2 and 4).

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS.

As shown in FIG. 1, a clutch release bearing device (A) according to the present invention comprises a resin sleeve (1).
And a side plate (2) integrally formed (insert molded) with the sleeve (1), and a ball disposed between the outer periphery (1a) of the sleeve (1) and one end surface (2a) of the side plate (2). A bearing (3) and a disc spring (4) as elastic means are provided.

The sleeve (1) is a substantially cylindrical molded body made of a resin material, and its inner periphery (1b) has a front cover (3).
3: See Fig. 7). A side plate (2) is integrally protruded from an end of the sleeve (1) on the transmission side (right side in the drawing), and an outer diameter side is formed on an outer peripheral surface (1a) of the sleeve (1a) on the clutch side (left side in the drawing). A protruding stopper (1a2) is formed. When the stopper (1a2) is assembled, the disc spring (4)
It has a function of engaging with the small-diameter end (40) to prevent its displacement. The stopper portion (1a2) is narrow, and its clutch side is an obtuse angled inclined wall, and the other end side where the small diameter end (40) of the disc spring (4) is engaged is a vertical wall or a slightly acute angled inclined wall. The inclined wall on the clutch side has a function of guiding the small-diameter end (40) of the disc spring (4) during installation. An annular engagement groove (1c) is formed on the transmission side of the stopper portion (1a2), and the depth thereof is slightly deeper than the outer peripheral surface (1a) of the clutch side.

The side plate (2) is made of a steel plate press, and one end surface (2a) of the side plate (2) has an outer ring (3) of a ball bearing (3) described later.
The flange (3b1) of b) abuts slidably in the radial direction, and the other end face of the abutment (2b) with which the release fork (34: see FIG. 7) abuts, for example, at a 180 ° facing position. Be placed.

The ball bearing (3) is an inner ring (3a) made of a steel plate press having at one end an outward flange (3a1) which comes into contact with the diaphragm spring (35: see FIG. 7) of the clutch device.
And an outer ring (3b) made of a steel plate press having an inward flange (3b1) at the other end, and interposed between the inner ring (3a) and the outer ring (3b), and the respective raceway surfaces (3a2) (3b2 ), A plurality of balls (3c) in angular contact with each other, a cage (3d) for holding the balls (3c) at predetermined intervals in the circumferential direction, and an inner ring (3a).
A first seal member (3e) for sealing at one end (the clutch device side) between an outer diameter surface of the outer ring and an inner diameter surface of the outer ring (3b), and a second seal member (3f) for sealing at the other end (mission side). ). In this embodiment, the first
The seal member (3e) is a non-contact type elastic seal whose outer diameter side is pressed into the inner diameter surface at the end of the outer ring (3b), and whose inner lip portion is the outer diameter at one end side of the inner ring (3a). Approach to the surface via a labyrinth gap. Also, the second seal member (3f)
Is a shield plate made of steel plate press with a substantially U-shaped cross section,
The outer diameter side portion is press-fitted and fixed to the inner diameter surface at the end of the outer ring (3b), and the inner diameter side end approaches the outer diameter surface at the end of the inner ring (3a) via a labyrinth gap. The first seal member (3
e) and a contact-type seal may be used as the second seal member (3f).

The disc spring (4) is a substantially conical steel plate press-formed product, and as shown in FIGS. 2 (a) and 2 (b), the conical spring provided at the large-diameter end (41). An annular base (4a),
A plurality of notches (4b) formed in the small diameter end (40) at equal intervals, and a plurality of tongue pieces (4c) formed between adjacent notches (4b) Is provided. The tongue piece (4c)
The diameter is reduced to have a cross-sectional curvature with the inner diameter side convex,
It is elastically deformable in the radial direction. Due to the elastic deformation of the tongue piece (4c), the small-diameter end (40) of the disc spring (4) can be expanded and contracted.

Each tongue piece (4c) of the disc spring (4) has a uniform thickness in the circumferential direction and, as shown in FIG. 3, the difference between the radius of the inscribed circle and the radius of the circumscribed circle (see FIG. 3). S) is a tongue piece (4
It is formed to be larger than the thickness (T) of c).
At this time, the inner diameter surface (4c1) and the outer diameter surface (4c2) of each tongue (4c) are not located on the same circumference and are in a discontinuous state. The shape of the tongue piece (4c) is arbitrary as long as the difference (S) between the radius of the inscribed circle and the radius of the circumscribed circle is larger than the thickness (T), and as shown in FIGS. In addition to being formed in a wave shape having a convex side, for example, as shown in FIG. 4A, a wave shape having a concave outer diameter side, or a flat shape as shown in FIG. It is also possible to form it.

At the time of assembly, as in the case of the conventional product, an assembly of the assembled product of the ball bearing (3) and the disc spring (4) is externally inserted from the clutch side end to the outer periphery of the sleeve (1), and this is inserted into the ball bearing. The cylindrical jig (5: FIG. 9) inserted into the annular space between the inner circumference of the inner ring (3a) and the outer circumference of the sleeve (1) of (3).
), Until the flange (3b1) of the outer ring (3b) comes into contact with the clutch-side end surface (2a) of the side plate (2). The disc spring (4) is elastically deformed in the axial direction by the pressing force of the jig (5), and the stopper (1a2) is formed while reducing the inner diameter of the tongue (4c).
, The tongue piece (4c) is engaged with the clutch-side wall surface of the engagement groove (1c) by the elastic return thereafter. At the same time, the large-diameter end (41: distal end of the annular base 4a) of the disc spring (4) presses against the outer ring flange (3b1) and elastically presses it against the side plate (2).

In the above pushing process, as shown in FIG. 6, the tongue piece (4c) has a circumferentially central portion protruding toward the outer diameter side to engage with the tip end surface (5a) of the jig (5). Therefore, compared with the conventional product, the number of engagement points with the tip surface (5a) of the jig (5) is increased, and the tongue piece (4c) of the disc spring (4) is chamfered (5b) of the jig (5). It becomes difficult to bite into. On the other hand, in the conventional product, as shown in FIG. 5, the inner surface (4c) of each tongue (4c)
1) and the outer diameter surface (4c2) are on a common circumference, and the difference (S) between the radius of the inscribed circle and the radius of the circumscribed circle is equal to the wall thickness (T). There is no protruding portion to the outer diameter side as described above, and therefore, it becomes easy to bite into the chamfered portion (5b).

When the assembly of the ball bearing (3) and the disc spring (4) is extrapolated to the outer periphery of the sleeve (1), the clutch release bearing device (A) shown in FIG. 1 is completed. There is a radial gap (S1) between the outer circumference of the sleeve (1) and the inner diameter surface of the inner ring (3a) of the ball bearing (3), and the inner surface of the flange portion (3b1) of the outer ring (3b) There is a radial gap (S2) between the outer circumference of the sleeve (1).
The radial gap (S2) is smaller than the radial gap (S1) (S2 <S1). And sleeve (1) and outer ring (3b)
The outer ring flange (3b1) is elastically pressed against the end surface (2a) of the side plate (2) by the urging force of the disc spring (4) compressed and interposed between the inner surface of the flange (3b1) and the inner surface of the side plate (2). By
The ball bearing (3) is elastically held slidably in the radial direction between the outer periphery of the sleeve (1) and the end surface (2a) of the side plate (2). The ball bearing (3) can be radially moved with respect to the sleeve (1) and the side plate (2) due to the existence of the radial gaps (S1) and (S2), and the amount of the centering movement is small. Is regulated by the radial gap (S2).

This clutch release bearing device (A)
Manual transmission Installed between the engine and the transmission of the car. Specifically, as shown in FIG. 7, a sleeve (1) (refer to FIG. 1 for each component of the clutch release bearing device) is provided on an outer periphery of a front cover (33) protruding from the transmission (32). The inner circumference is slidably inserted in the axial direction. A forked release fork (34) comes into contact with the contact portion (2b) of the side plate (2). When a clutch pedal (not shown) is depressed, the release fork (34) swings and the side plate (2). To the clutch device side, and the sleeve (1) and the ball bearing (3) are moved in the axial direction along the front cover (33). Then, the inner ring flange portion (3a1) of the ball bearing (3) comes into contact with the diaphragm spring (35) of the clutch device and presses and reverses it. Then, due to the elasticity of the diaphragm spring (35), the pressure plate (38) pressing the clutch disc (36) against the flywheel (37) separates from the clutch disc, thereby releasing the clutch and the output shaft of the engine. The rotation of (39) is separated from the transmission (32). When the clutch pedal is released, the sleeve (1) and the ball bearing (3) return to their original position with the release fork (34) (or due to the elasticity of the diaphragm spring). This allows
The clutch is connected, and the rotation of the output shaft (39) of the engine is transmitted to the transmission (32) via the transmission shaft (40). The ball bearing (3) of the clutch release bearing device (A) can perform centering movement within a predetermined range with respect to the sleeve (1), and therefore, the shaft center of the front cover (33) and the shaft of the output shaft (39). Even if there is an error in assembling between the center and the center, and if the center of rotation of the diaphragm spring (35) and the center of rotation of the clutch release bearing device (A) are misaligned, the ball bearing (3) is displaced by that amount. , The misalignment is automatically centered. Further, after the ball bearing (3) is centered and moved by a required amount, the ball bearing (3) is elastically held at the position by the urging force of the disc spring (4), and does not shift even if it receives vibration, impact or the like from the engine. , So-called centering drag.

[0021]

As described above, according to the present invention, it is possible to reliably prevent the disc spring from biting into the inner diameter of the jig, thereby facilitating the mounting work of the disc spring and improving the assembling workability of the apparatus. The bearing device can be improved, and the bearing device can be further downsized.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a self-aligning clutch release bearing device according to the present invention.

FIG. 2 is a partial front view of a disc spring according to the present invention (FIG. 2A);
(A) is a cross-sectional view (b) of FIG.

FIG. 3 is an enlarged front view of the disc spring.

FIG. 4 is a partial front view showing another embodiment of the disc spring.

FIG. 5 is a partial front view of a conventional disc spring.

FIG. 6 is a cross-sectional view showing a mounting state of a disc spring according to the present invention.

FIG. 7 is a cross-sectional view illustrating a peripheral portion of a clutch device of an automobile.

FIG. 8 is a sectional view (a) and a front view (b) of a conventional disc spring. It is sectional drawing which shows the mounting condition of the disc spring concerning this invention.

FIG. 9 is a cross-sectional view showing a step of assembling the disc spring (a partially enlarged view).

FIG. 10 is a cross-sectional view showing a mounting state of a conventional disc spring.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sleeve 2 Side plate 3 Ball bearing 3a Inner ring 3a1 Inner ring flange 3b Outer ring 3b1 Outer ring flange 3c Ball 4 Disc spring 40 Small diameter part 41 Large diameter part 4a Ring base 4c Tongue piece 33 Front cover 34 Release fork

Claims (4)

[Claims] An inner ring which comes into contact with a rotating member of a clutch device, an outer ring having an inwardly directed outer ring flange, a ball bearing having a plurality of balls interposed between the inner ring and the outer ring, and a side plate extending to the outer diameter side. A resin sleeve in which the release fork is slidable in the axial direction on the front cover of the transmission by the operation of the release fork, and an inner ring of the ball bearing is externally inserted with a radial gap around the outer periphery thereof; and an outer peripheral surface of the sleeve. It has a cylindrical shape having a small diameter portion that engages with the outer ring flange and a large diameter portion that presses against the outer ring flange of the ball bearing. The outer ring flange is elastically pressed against the side plate of the sleeve to hold the ball bearing in an alignable manner. A clutch release bearing device, wherein the small diameter portion of the disc spring has a shape in which the difference between the inscribed circle radius and the circumscribed circle radius is larger than the thickness of the small diameter portion. 2. An annular base having the large-diameter portion at one end, and a plurality of tongue pieces having a small-diameter portion at a distal end, the annular base having a reduced cross-sectional curvature from the other end of the annular base. 2. The clutch release bearing device according to claim 1, wherein the clutch release bearing device comprises: 3. A ball bearing having an inner ring in contact with a rotating member of a clutch device, an outer ring having an inwardly directed outer ring flange, a plurality of balls interposed between the inner ring and the outer ring, and a side plate extending to the outer diameter side. A clutch release having a resin sleeve that is slidable in the axial direction on the front cover of the transmission by the operation of a release fork, and the inner ring of the ball bearing is externally inserted with a radial gap around the outer periphery of the clutch release. A disc spring provided in a bearing device, which has a cylindrical shape having a small-diameter portion engaged with an outer peripheral surface of a sleeve and a large-diameter portion pressed against an outer ring flange of a ball bearing. In a ball bearing which is elastically pressed against a side plate to hold the ball bearing in an alignable manner, the difference between the inscribed circle radius and the circumscribed circle radius of the small diameter portion is larger than the thickness of the small diameter portion. Shaped crack Disc spring for chill release bearing device. 4. An annular base having the large-diameter portion at one end thereof, and a plurality of tongue pieces having a small-diameter portion at the distal end, the diameter of which is reduced from the other end of the annular base with a sectional curvature. Item 3. A disc spring for a clutch release bearing device according to Item 3.