JPS62246630A - Release bearing mechanism for clutch - Google Patents

Abstract

PURPOSE:To stably and integrally engage both flywheel and opposite flywheel side members, by forming a point end part of the opposite flywheel side member in a tapered surface to be inserted lifting a ring-shaped elastic material, which engages with long holes provided in the flywheel side member, and engaging the ring-shaped elastic material with a groove provided in an intermediate part of the opposite flywheel side member. CONSTITUTION:An opposite flywheel side member 27 provides a groove 42 in its intermediate part while forms a tapered surface 41 in the point end part. A cylindrical main unit 28 of a flywheel side member 26 provides in the vicinity of its opposite flywheel side end part a plurality of long holes 33 in such a manner as to contain a surface crossing at a right angle with the axial center direction, and a ring-shaped elastic material 35 of wave-shaped section is engaged with the long holes 33. By this constitution, if the opposite flywheel side member 27 is moved approaching to a flywheel side, the elastic material 35 is lifted by the tapered surface 41, and in this condition, the opposite flywheel side member is pushed advancing. And the flywheel side member is stably and integrally engaged with the opposite flywheel side member by engaging the elastic material 35 with the groove 42 elastically contracting the size.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is a clutch release bearing II! 114,
More specifically, the present invention relates to a release bearing mechanism for a so-called pull-type clutch in which the clutch is disconnected by pulling an elastic body that presses a pressure plate toward the flywheel toward the opposite side of the flywheel.

(Prior Art) Clutch release bearing mechanisms are broadly classified into the so-called bush type and the pull type based on their disconnection mechanism.Recently, the pull type has been attracting attention due to its high efficiency. However, in the release bearing mechanism of this type of pull type clutch, there is generally a problem in the ease of assembly of the release bearing portion, and various proposals have been made to improve the ease of assembly. For example, JP-A-59-19762
There is a clutch release bearing mechanism No. 3, and in this clutch release bearing mechanism of JP-A-59-197623, as shown in FIG. A diaphragm spring 3 is supported by an elastic washer 5 whose inner periphery is locked to the working piece 4, and a ring-shaped member 7 having a circular cross section is provided between the working member 1 and the working piece 4.
is interposed, and this ring-shaped member 7 is held between a support surface 8 formed on the action member 1 and a tapered support surface 9 formed on the action piece 4, and the action member 1 and the action piece 4 are
It is intended to be integrated with the The support surface 9 is a ring-shaped member 7
This is one side of the holding groove 10 that temporarily accommodates the holding groove 10, and is a tapered surface that substantially faces the support surface 8. Working piece 4
A release bearing 12 is integrally attached to the. An engagement surface 11 is formed on the inner peripheral side of the right end of the action member 1 in the figure, on which the ring-shaped member 7 comes into contact and slides when the action piece 4 is assembled to the action member 1 .

8 to 11 show the operating state when the working piece 4 is assembled to the working member 1 side. In the state shown in FIG. Approximately half of the ring-shaped member 7 protrudes from the holding groove 10 toward the outer periphery, and as the working piece 4 advances toward the working member 1 side, the ring-shaped member 7 comes into contact with the engagement surface 11, and from this contact state, the working piece 4 further advances toward the action member 1, the diameter of the ring-shaped member 7 is reduced by the engagement surface 11, resulting in the state shown in FIG. 9. From this state, working piece 4
As it advances further toward the working member 1 side, the ring-shaped member 7 expands in diameter and becomes the state shown in FIG. It is held between the holding groove 10,
The integration of the working member 1 and the working piece 4 is completed. In this state, the working piece 4 is moved in the pull direction (arrow F in Fig. 11).
When pulled in the pull direction), the actuating member 1 also moves in the pull direction and the clutch is disengaged.

(Problems with the prior art) However, in the conventional configuration described above, the state of retention of the ring-shaped member 7 between the support surfaces 8 and 9 is delicate, and the ring-shaped member 7 with a circular cross-sectional shape and the tapered shape The contact with the support surface 9 is a line contact, and a large force acts locally on the ring-shaped member 7, leading to stage 9 fatigue of the ring-shaped member 7 and making the clutch release operation unstable. There was a problem.

(Means for Solving Problems) 5. The present invention provides a pull-type clutch in which the clutch is disconnected by pulling the elastic body that presses the pressure plate toward the flywheel toward the opposite side of the flywheel. The release bearing mechanism includes a flywheel side member and a non-flywheel side member to which the release bearing is attached, and the flywheel side member has a substantially cylindrical main body and an inner peripheral portion of the elastic body is locked. A plurality of elongated holes each having a surface substantially perpendicular to the axial direction are formed in the main body, and a ring-shaped elastic body having a radially wavy shape that engages with these elongated holes is provided in the main body. While attached to the flywheel side member, a tapered surface is formed in the vicinity of the flywheel side tip of the anti-flywheel side member, and a tapered surface is formed in the vicinity of the tip of the anti-flywheel side member, and a substantially intermediate portion in the length direction of the anti-flywheel side member. A groove including a surface substantially perpendicular to the axial direction is formed on the outer circumferential surface, and when the anti-flywheel side member advances toward the flywheel side,
After the tapered surface expands the diameter of the ring-shaped elastic body, the ring-shaped elastic body engages with the groove, and in this engaged state, the anti-flywheel side member is pulled toward the anti-flywheel side. This is a clutch release bearing mechanism characterized in that it is configured to enable.

(Embodiment) In FIG. 1 showing an embodiment of the present invention, 20 is a flywheel, and a clutch disc 21 is pressed on the flywheel 20 side by a pressure plate 22.
It is pressed toward the flywheel 20 side (left side in the figure) by a clutch cover 23 fixed to the clutch cover 23 and a diaphragm spring 3 supported by a hub portion 29 of a flywheel side member 26 (to be described later). An input shaft 24 is spline-fitted to the clutch disc 21 so that the rotation of the flywheel 20 is transmitted to the input shaft 24 via the clutch disc 21.

The release mechanism for disengaging the clutch includes a flywheel-side member 26 and an anti-flywheel-side member 27, and the flywheel-side member 26 includes a substantially cylindrical main body 28 and this main body, as shown in FIG. 28 flywheel 2
It has a hub part 29 extending in the radial direction from the 0 side (left side in FIG. A folded part 30 is formed that protrudes to the side (right side in FIG. 2), and a snap ring 32 is locked to this folded part 30. The peripheral part is locked. Near the end of the main body 28 on the side opposite to the flywheel 20, there is a long hole 33 including a surface substantially orthogonal to the axial direction.
For example, three inverting holding portions 31 are formed to prevent the ring-shaped elastic body 35 (to be described later) from expanding due to centrifugal force, except for the portion where the elongated hole 33 is formed.

As shown in FIG. 3, the ring-shaped elastic body 35 has a radially wavy shape and alternately has bottom portions 36 close to the axis and top portions 37 remote from the axis. The ring-shaped elastic body 35 does not have a closed annular structure but has a shape with cut off ends, and both ends serve as gripping portions 38 extending in the radial direction. This ring-shaped elastic body 3
The axial cross-sectional shape of 5 is approximately rectangular (
(FIG. 2), it has a shape that allows stable and firm engagement with a groove 42 formed on the outer circumferential surface of an anti-flywheel side member 27, which will be described later. A portion of the ring-shaped elastic body 35 near the bottom 36 enters and is locked into the long hole 33, and is maintained attached to the flywheel side member 26 in a normal state (FIG. 4).

The anti-flywheel side member 27 has a generally cylindrical shape as a whole, and a tapered surface 41 is formed near the tip of the anti-flywheel side member 27 on the flywheel 20 side so that the tip becomes tapered. This tapered surface 41 facilitates the entry of the anti-flywheel side member 27 into the flywheel side member 26 and the ring-shaped elastic body 35 side. Anti-flywheel side member 27
A groove 42 including a surface substantially perpendicular to the axial direction is formed on the outer circumferential surface of the substantially intermediate portion in the longitudinal direction.
The axial cross-sectional shape of the ring-shaped elastic body 35 is formed into a substantially rectangular shape that substantially matches the axial cross-sectional shape of the ring-shaped elastic body 35 . This anti-flywheel side member 27 also serves as the inner race portion 43 of the release bearing portion 45 (FIG. 1), and the right side portion of the anti-flywheel side member 27 in FIG. 2 serves as the inner race portion 43. There is.

47 (Fig. 1) acts on the release bearing part 45,
This is an operation unit that operates the clutch to a disengaged state.

Next, the operation will be explained. In order to integrate the flywheel side member 26 and the anti-flywheel side member 27 from the state where the flywheel side member 26 and the anti-flywheel side member 27 are separated as shown in FIG. 27 to the flywheel 20 side (in the direction of arrow a in the figure), and after bringing the tapered surface 41 into contact with the end of the flywheel side member 26 on the side opposite to the flywheel 20, using this tapered surface 41, The bottom portion 36 of the ring-shaped elastic body 35 is expanded in diameter, and the anti-flywheel side member 27 is further advanced toward the flywheel 20 side (FIGS. 5 and 6).

When the groove 42 of the anti-flywheel side member 27 reaches the ring-shaped elastic body 35, the ring-shaped elastic body 35 contracts in diameter due to its own elasticity, and the bottom part 36 clicks into the groove 42. The first member engages and completes the integration of the flywheel side member 26 and the anti-flywheel side member 27.
figure). When the flywheel side member 26 and the anti-flywheel side member 27 are completely integrated, a force is applied to the anti-flywheel side member 27 in the pull direction (in the direction of the arrow in FIG. 1) to disconnect the clutch. Then, the anti-flywheel side member 27 pulls the flywheel side member 26 integrally, and the flywheel side member 26 pulls the diaphragm spring 3 (Fig. 1), and the diaphragm spring 3
The pressure on the pressure plate 22 (FIG. 1) is released, and the clutch becomes disengaged.

From the state where the flywheel side member 26 and the anti-flywheel side member 27 shown in FIG. If it becomes necessary to remove the ring-shaped elastic body 35 from the 26 side, use some kind of tool to grasp the gripping part 38 of the ring-shaped elastic body 35, move the ring-shaped elastic body 35 to the left side in FIG.
After releasing the top portion 37, the gripping portion 38 is expanded in the direction shown by arrow C in FIG. 3 to release the bottom portion 36 from the groove 42 (not shown).

By withdrawing the anti-flywheel side member 27 to the anti-flywheel 20 side with the bottom portion 36 released from this groove 42, the anti-flywheel side member 27
can be easily removed from the flywheel side member 26 side.

(Effect of the invention) In the clutch release bearing mechanism according to the present invention,
A plurality of elongated holes 33 each having a surface substantially perpendicular to the axial direction are formed in the main body of the flywheel side member 26, and these elongated holes 33
A radially wavy ring-shaped elastic body 35 that engages with the
is attached to the flywheel side member 26, while a tapered surface 41 is formed near the tip of the anti-flywheel side member 27 on the flywheel 20 side, and the length of the anti-flywheel side member 27 is A groove 42 including a surface substantially perpendicular to the axial direction is formed on the outer circumferential surface of the substantially intermediate portion in the transverse direction, and as the anti-flywheel side member 27 advances toward the flywheel 20 side, the tapered surface 41 becomes ring-shaped elastic. After the diameter of the body 35 is expanded, the ring-shaped elastic body 35 is engaged with the ring 42, so that the anti-flywheel side member 27 can be attached to the flywheel side member 26 very easily. Moreover, the engagement between the groove 42 and the ring-shaped elastic body 35 is
Since the flywheel side member 26 and the anti-flywheel side member 27 are integrated, their engagement is stable and strong, making the clutch release operation extremely stable. be able to.

[Brief explanation of drawings]

Fig. 1 is a partially omitted vertical sectional side view showing an embodiment of the present invention, Fig. 2 is a partially enlarged sectional view of the main part, Fig. 3 is a partially cutaway view of Fig. 2, and Figs. Fig. 6 is a longitudinal side view of the main part to explain the operating state, Fig. 7 is a schematic longitudinal side view of the main part showing a conventional example, and Figs. 8 to 11 are longitudinal side views of the main part to explain the operating state. It is a diagram. 3...Diaphragm spring, 20...Flywheel, 22...Pressure plate, 26...Flywheel side member,
27... Anti-flywheel side member, 28... Main body,
29... Hub portion, 33... Long hole, 35... Ring-shaped elastic body, 41... Tapered surface, 42... Groove, 45
・・・Release bearing part Fig. 6 1112 Fig. 7 4...

Claims (2)

[Claims] (1) In a pull-type clutch release bearing mechanism in which the clutch is disconnected by pulling the elastic body that presses the pressure plate toward the flywheel toward the anti-flywheel side, the flywheel-side member and the release an anti-flywheel side member to which a bearing is attached; the flywheel side member includes a substantially cylindrical main body; and a hub portion to which an inner peripheral portion of the elastic body is engaged; the main body has a shaft; A plurality of elongated holes each having a surface substantially perpendicular to the core direction are formed, and a ring-shaped elastic body undulating in the radial direction that engages with these elongated holes is attached to the flywheel side member, while the anti-flywheel side member A tapered surface is formed near the tip of the side member on the flywheel side, and a surface substantially orthogonal to the axial direction is formed on the outer circumferential surface of the approximately intermediate portion in the longitudinal direction of the anti-flywheel side member. A groove including the ring-shaped elastic body is formed, and the tapered surface expands the diameter of the ring-shaped elastic body by advancing the anti-flywheel side member toward the flywheel side.
The clutch is characterized in that the ring-shaped elastic body is engaged with the groove, and in the engaged state, the anti-flywheel side member can be pulled toward the anti-flywheel side. Release bearing mechanism. (2) The axial cross-sectional shape of the ring-shaped elastic body is formed into a substantially rectangular shape, and the axial cross-sectional shape of the groove formed on the outer peripheral surface of the anti-flywheel side member is
2. The clutch release bearing mechanism according to claim 1, wherein the clutch release bearing mechanism is formed into a substantially rectangular shape that substantially matches the axial cross-sectional shape of the ring-shaped elastic body.