JPS62242132A - Clutch release device - Google Patents

Abstract

PURPOSE:To reduce abrasion between the following both components by providing a rolling member on either of the end part of a clutch release fork or a clutch release bearing and transferring a clutch release bearing through said rolling member. CONSTITUTION:Bearing housing parts 23 facing toward the end part 8b of a clutch release fork member 8 are provided at two locations of a contact member 21, facing to each other in the radial direction. And a holding part 24 is erected on almost the center of outsides 23c of the bearing housing parts 23, and the end part 8b of the clutch release fork member 8 is held at the flection part 24a at the end of the holding part 24. Further, a rubber elastic member 31 and a slide bearing 25 which is formed of a needle-like roller 26 and a holder 27 are provided on the bearing housing part 23, and the end 8b of the clutch release fork member 8 is brought into contact with a contact plate 28. Accordingly, abrasion is reduced and leg-power is protected from being deteriorated because rolling contact is achieved between the release fork member 8 and a bearing.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a clutch release device mainly used for engaging/disengaging clutches in automobiles and the like.

<Prior Art> Conventionally, there is a clutch release device of this type as shown in FIG. In this clutch release device, an input shaft 5 passes through a center hole 3 of a cylindrical portion 2 of a housing l, and a clutch release bearing 6 is provided on an outer peripheral surface 2a of the cylindrical portion 2 so as to be movable in the axial direction. The diaphragm spring 4 is in contact with the diaphragm spring 6.

The housing 1 located below the cylindrical portion 2 is provided with a support pin 7, and the hemispherical head 7a of the support pin 7 supports the hemispherical concave surface 8a at the approximate center of the clutch release fork member 8. A tip 8b of the clutch release fork member 8 is in contact with an abutting member 11 provided at the rear of the clutch release bearing 6.

Furthermore, the base end 8c of the clutch release fork member 8 is attached to an actuating member 12 that is linked to a clutch pedal (not shown). Then, the clutch release fork member 8 is released via the actuating member 12 by the clutch pedal.
is swung around the support pin 7, and the clutch release bearing 6 is pressed in the axial direction by the tip 8b of the clutch release fork member 8 via the contact member 11.

And the shaft of this clutch release bearing 6! The movement in the j direction operates the diaphragm spring 1 to engage and disengage the clutch.

<Problems to be solved by the invention> However, in the above conventional clutch release device,
When the clutch release bearing member 8 swings, the tip 8b of the clutch release fork member 8 presses the contact member 11 of the clutch release bearing 6 (5 and slips, so that the contact member 11 and the clutch release fork member 8 There is wear on both sides.

There is a problem in that this wear affects the deterioration of the clutch pedal depression force (the clutch cannot be disengaged even if the clutch pedal is depressed by a predetermined amount).

This invention aims to solve the above-mentioned problems, and its purpose is to reduce the amount of wear generated in both by bringing the clutch release bearing and the clutch release leaf into rolling contact. The object of the present invention is to reduce the clutch pedal depression force and reliably transmit the clutch pedal depression force to the clutch release bearing so that the latch can be smoothly engaged and disconnected.

<Means for Solving the Problems> In order to achieve the above object, the clutch release device of the present invention is provided with a rolling member on either the tip of the clutch release fork member or the clutch release bearing. The present invention is characterized in that the clutch release fork member moves the clutch release bearing in the axial direction via a rolling member.

<Operation> The depression force of the clutch pedal is transmitted to the clutch release fork member and presses the clutch release bearing via the clutch release leaf member or rolling member. Here, since there is a rolling member between the clutch release fork member and the clutch release fork member, there is no sliding between the clutch release bearing and the clutch release fork member, and there is no sliding between the clutch release bearing and the clutch release fork member. It is possible to reduce the amount of wear at the tip of the member, and therefore, the depression force of the clutch pedal can be reliably transmitted to the clutch release bearing, and the clutch release bearing can be moved smoothly.

<Embodiment> FIGS. 1(a) and 1(b) show the relationship between the abutting member of the clutch release bearing, which is a main part of a clutch release device according to an embodiment of the present invention, and the tip of the clutch release fork member. Since the other configuration is exactly the same as that of the conventional example shown in FIG. 6, only the main parts will be explained.

In FIGS. 1(a) and 1(b), 21 is a ring-shaped contact member, 23 is provided at two locations (only one location is shown in the figure) facing each other in the radial direction of the contact member 21, and the clutch release A bearing accommodating portion 23 (only one location is shown) faces the forked tip 8b of the fork member 8, and this bearing accommodating portion 23 is formed by bending from the circumferential direction at regular intervals in the circumferential direction. parts 23a, 23a and a flat part 231 between them
Consists of 1. Further, 24 is the outer surface 2 of the bearing storage portion 23.
A holding portion 25 stands upright from approximately the center of the bearing storage portion 23 and holds the tip portion 8b of the clutch release fork member 8 from above with a bent portion 24a at the tip.

Three needle rollers 26 surrounded by 23a and the holding part 24.
26. A slide bearing as a rolling member consisting of 26, a retainer 27, and a rectangular contact plate 28 placed on these and abutted by the tip 8b of the clutch release fork member 8; 31 is a bearing storage portion 23; and the slide bearing 25, and the slide bearing 2
5 is a U-shaped elastic member with a thick rubber end that absorbs displacement in the circumferential direction.

When the clutch pedal is depressed, this pedal force is transmitted to the tip 8b of the clutch release fork member 8. By pressing the tip portion 8b against the contact plate 28, the clutch release bearing moves along the outer peripheral surface of the cylindrical portion of the housing in the axial direction, and the clutch is engaged and disengaged. At this time, the tip portion 8b of the clutch release fork member 8 touches the contact plate 28 with the needle rollers 26, 26.
Since the clutch release fork member 8 is pressed while moving smoothly by the clutch release fork member 8, almost no frictional force due to slipping is generated between the clutch release fork member 8 and the clutch release bearing. It can reduce the amount of wear and tear. Note that the movement of the contact plate 1 note 2B due to the slippage of the tip 8b of the clutch release fork member 8 is absorbed by the elastic member 3I. In this way, since the amount of wear can be reduced, the pressing force of the clutch pedal is reliably transmitted to the clutch release bearing via the clutch release fork member 8, and deterioration of the pressing force is prevented, and the latch is normally engaged and disconnected. .

FIGS. 2(a) and 2(b) show a different embodiment. In this embodiment, a pin 41.41 is attached to the tip 8b of the clutch release fork member 8, and a ball as a rolling member is attached to the pin 41.41. While the inner ring 42 of the bearing 46 is fitted, the outer circumference 43a of the outer ring 43 is brought into contact with the contact member 11 of the clutch release bearing. In this way, the tip 8b of the clutch release fork member 8 and the contact portion 4411 of the clutch release bearing are connected to the outer ring 4 of the ball bearing 46.
3 makes rolling contact. Therefore, the occurrence of friction between the two can be prevented as much as possible, and wear on the tip 8b of the clutch release fork member 8 and wear on the abutment member 11 of the clutch release bearing is almost eliminated. Therefore, the depression force of the clutch pedal is reliably transmitted to the clutch release bearing, and deterioration of the depression force is prevented. In addition, the said rolling member may be a ball bearing as mentioned above, or may be a needle roller bearing.

FIG. 3(a) shows a support pin that supports a substantially central portion of the clutch release fork member. This support pin 50 consists of a ball holding part 52 at the front and a threaded part 53 at the rear. The ball holding part 52 has a stepped cylindrical shape, and has a recess 54 formed in the large diameter part of the front part, and a bottom surface 54a of the recess 54.
is a curved surface that follows the surface of the sphere. A plurality of small-diameter balls 55, 55... are arranged on the bottom surface 54a, and a large-diameter ball 56 corresponding to the size of the recess 54 is placed on top of the balls 55, 55, and accommodated in the recess 54. are doing. In order to prevent the large diameter ball 56 from easily protruding from the recess 54, a protrusion 52a is formed at the entrance of the recess 54 to narrow the ball accommodation opening. Then, the threaded portion 53 of the support pin 50 is screwed into the casing, and the large diameter ball 56 is screwed into the casing.
The clutch release fork member is supported by the outer surface 56a of the clutch release fork member being in contact with a substantially central portion of the clutch release fork member.

When the clutch release fork member moves supported by the support pin 50, the large diameter ball 56 of the support pin 50 comes into contact with the approximately central portion of the clutch release fork member and the small diameter balls 55, 55, . It rolls smoothly. Therefore, since the clutch release fork member and the support pin 50 roll rather than slip as in the conventional example, almost no frictional force acts between the clutch release fork member 8 and the support pin 50, reducing wear on both. It can be reduced as much as possible.

FIG. 3(b) shows another support pin that supports a substantially central portion of the clutch release fork member. This support pin 51 is a cylindrical member 58 having a cylindrical shape, which is the same as the ball holding portion 52 described above. Other configurations and functions are shown in Figure 3 (a)
), so its explanation will be omitted.

FIGS. 4(a) and 4(b) show a clutch release bearing in which a contact plate is attached to the abutting member. The contact plate 61 is a ring-shaped circular plate member having a diameter smaller than that of the contact member 60, and has a diameter of 4 ft, lit, which is formed on the outer peripheral portion 61a at equal intervals in the circumferential direction. Protrusion 6
2a, 62a, 62b, and 62b respectively correspond to the insertion portions 60a and 60a of the abutment member 60.

It is inserted into 60b and 60b. These protrusions 62a.

A band-shaped 163.63 is formed over the entire radial direction approximately at the center of the larger protrusion 62a, 62b, 62b. This groove 63.6
3, the tip of the clutch release fork member is fitted so that it makes surface contact. Furthermore, the inner circumferential surface 61b of the contact plate 61 is stopped at two opposing locations by stop members 64 and 64 of the abutting member 60 to prevent it from being pulled out in the axial direction. The tip of the two-leg clutch release fork member is fitted into the groove 63.63 of the contact plate 6I, and the tip of the clutch release fork member is held from above by the bent portions 60c, 60c of the contact member 60.

When the clutch pedal is depressed, the tip of the clutch release fork member moves into the groove 6 of the contact plate 61.
When moving within 3.63, the tip of the clutch release fork member and 'rl+'i 63.

Since the contact with 63 is a surface contact, the surface pressure is lowered and the amount of wear on both sides is reduced.

FIGS. 5(a) and 5(b) connect the tip of the clutch release fork member and the contact member of the clutch release bearing with a pin, and the support pin is similar to that shown in FIG. 3(a). The clutch release fork member is supported by the support pin with the ball in contact with the approximate center of the clutch release fork member. In this case, the distal end 70b of the clutch release fork member 70 and the abutment member 71 of the clutch release bearing are rotatably fixed by a pin 72 to prevent wear on both, and the clutch release fork member 70 is Movement in the longitudinal direction during movement is absorbed by the rolling of the ball 56 of the support pin 51. Therefore, wear between the tip 70b of the clutch release fork member 70 and the abutment member 71 can be almost completely eliminated, and the substantially central portion 70a of the clutch release fork member 70 and the ball 56 of the support pin 51 can be Therefore, the amount of wear of the clutch release fork member 70 as a whole can be reduced, and deterioration of the clutch pedal depression force can be prevented.

According to the embodiments described above, the slide bearing 25 or ball bearing 46 interposed between the tip of the clutch release fork member and the contact member comes into contact with the approximate center of the clutch release fork member to support the clutch release fork member. When used in combination with support pins 50 and 51 having balls 56, the amount of wear between the abutment member of the clutch release bearing and the tip of the clutch release fork member and the approximately central portion of the clutch release fork member and the support pin are reduced. 50.51 can be reduced at the same time, and a synergistic reduction in the wear amount of the clutch release fork member as a whole can be expected. Then, the depression force of the clutch pedal can be reliably transmitted to the clutch release bearing, the clutch release bearing can be smoothly moved, and deterioration of the depression force can be prevented.

<Effects of the Invention> As is clear from the above description, the clutch release device of the present invention includes a rolling member on either the tip of the release fork member or the clutch release bearing, so that the release fork member and the clutch The contact with the release bearing can be made into a rolling contact via a rolling member instead of a sliding contact. Therefore, according to the present invention, it is possible to reduce wear between the release fork member and the clutch release bearing, and the depression force of the clutch pedal can be reliably transmitted to the clutch release bearing via the release fork member. The bearing can be moved smoothly and deterioration of clutch pedal depression force can be prevented.

[Brief explanation of drawings]

FIG. 1(a) is a diagram showing an embodiment of the present invention, FIG.
b) is a view taken along the line I-1 in FIG. 1(a), FIG. 2(a) is a view showing the tip of the fork member of the above embodiment,
b) is a view taken along the line ■-■ in Fig. 2(a), Fig. 3(a) is a sectional view showing the support pin of the above embodiment, and Fig. 3(b) is a support pin of another embodiment. 4(a) is a sectional view showing the hub member of the clutch release bearing, and FIG. 4(b) is a sectional view showing the hub member of the clutch release bearing.
) is a sectional view taken along the line ■-■ in FIG. 4(a), FIG. 5(a) is a view showing the tip and approximately the center of the fork member, and FIG. ■-V line arrow view in figure (a),
FIG. 6 is a diagram showing a conventional example. 2...Cylindrical part, 2a...Outer peripheral surface, 5...Transmission shaft,
6... Clutch release bearing, 8... Clutch release fork member, 8a... Approximately central portion, 8b... Tip portion, 25.46... Rolling member. Figure 1 (0) Work No. 1 WJ (1)) Problem 2 a) ■ Figure 2 (b) tas diagram (Q) Figure 5 (b) Figure 6

Claims (1)

[Claims] (1) A clutch release bearing provided slidably in the axial direction on the outer peripheral surface of the cylindrical portion through which the input shaft passes;
A clutch release device comprising a clutch release fork member whose approximately central portion is supported by the head of a support pin and whose tip presses the clutch release bearing, wherein either the tip of the clutch release fork member or the clutch release bearing is A clutch release device characterized in that a rolling member is provided on one side, and the clutch release bearing is moved via the rolling member.