JPH077628Y2 - Snap ring support collar - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a snap ring support collar, and more particularly to a snap ring support collar for a release device that moves an inner peripheral portion of a diaphragm spring of a pull type clutch.

[Conventional technology]

A conventional pull-type clutch release device includes a snap ring and an annular collar having a plurality of pawls having a V-shaped fold for holding the snap ring. This snap ring and collar assembly is interposed between a lever plate provided on the inner circumference of the diaphragm spring and a release bearing driven by a release lever, so that they can be separated and connected. is doing.

In this release device, when the release bearing drives the release bearing axially rearward, the inner peripheral end of the diaphragm spring also moves via the snap ring and the collar, and the clutch is released.

[Problems to be Solved by the Invention] In the above-described conventional configuration, since the snap ring is arranged on the outer peripheral side of the collar claw, the collar claw is in direct contact with the release bearing side. Therefore, when the clutch is engaged / disengaged, the operating force is directly applied to the collar's claw (particularly, its bent portion). However, since the snap ring support collar is formed by bending a plate material, if the dimensional accuracy is low, the bent portion of the claw is likely to be damaged. When such damage occurs, it becomes difficult to remove the release device from the diaphragm spring, for example.

In order to solve this problem, the applicant of the present application filed Japanese Patent Application No. 2-73.
No. 037 has already proposed a configuration in which a V-shaped notch corresponding to the shape of a color nail is formed in a snap ring. According to this configuration, since the collar claws bite into the snap ring, most of the operating force transmitted from the release bearing to the diaphragm spring is via the snap ring having a large cross-sectional area. Therefore,
A large load is not applied to the collar, and the durability of the collar is improved.

However, in the configuration according to the above application, the snap ring has a V
Since the V-shaped notch must be formed, the snap ring is complicated to process, and automatic processing is difficult.

An object of the present invention is to provide a snap ring support collar that can realize a release device having high durability and easy to manufacture.

[Means for Solving the Problems]

A snap ring support collar according to the present invention is a snap ring support collar for a release device that moves an inner peripheral portion of a diaphragm spring of a pull type clutch and has a snap ring.

The snap ring support collar includes an annular collar body, a first pawl and a second pawl. The first nail is
It is formed integrally with the collar body, holds the snap ring concentrically with the collar body, and has a bent portion at the tip. The second claw is formed integrally with the collar body, and the snap ring is sandwiched between the second claw and the bent portion.

[Action]

In the snap ring support collar according to the present invention, the bent portion of the first claw and the second claw formed on the collar body hold the snap ring. Therefore, it is not necessary to form the tip of the claw into a V shape to hold the snap ring, and the claw shape is simplified. Moreover, the shape of the notch of the snap ring formed so as to correspond to the claw shape is also simplified accordingly.

Therefore, by using the color according to the present invention,
It is possible to realize a release device having high durability and easy to manufacture.

〔Example〕

FIG. 1 shows a pull type clutch to which an embodiment of the present invention is applied. Here, OO is the center line.

In the figure, this pull type clutch is mainly composed of a clutch cover assembly 1, a clutch disc 2, a release device 3, and a release fork 4.

The clutch cover assembly 1 has a clutch cover 6 fixed to a flywheel 5 on the engine side, a pressure plate 7 arranged inside the clutch cover 6, and an annular diaphragm spring 8. here,
The diaphragm spring 8 elastically presses the pressure plate 7 toward the clutch disc 2 side.

The outer peripheral portion of the clutch disc 2 is a flywheel 5
It is sandwiched between the pressure plate 7 and the pressure plate 7. A front end portion (a left end portion in FIG. 1) of a main drive shaft (not shown) on the transmission side is spline-engaged with the center of the clutch disc 2.

A transmission housing 9 is arranged behind the clutch cover 1 (on the right side in FIG. 1). The rear portion of the main drive shaft (not shown) that is spline-engaged with the clutch disc 2 extends into the mission housing 9. A clutch housing 10 is integrally provided at the front end of the transmission housing 9 to cover the clutch cover 1, the flywheel 5, etc. from the outer peripheral side. Further, in the clutch housing 10, a collar 11 is arranged at the center of the front wall 9a of the mission housing 9.
The collar 11 covers a main drive shaft (not shown) from the outer peripheral side.

As shown in FIG. 2, the release device 3 includes a release bearing 12, a snap ring 14, and a wedge collar 15.
And a lever plate 16.

The release bearing 12 is slidably fitted on the outer periphery of the collar 11. Inner race of release bearing 12
13 has an extension portion 13a formed by extending forward in the axial direction. As shown in FIG. 3, the extension portion 13a has a step portion 13b on the outer periphery in the front in the axial direction, and the step portion 13b has an annular groove 13c.
Is equipped with.

As shown in FIG. 4, the snap ring 14 is an annular member having a circular cross section divided at one place, and has a plurality of notches 14a in the inner peripheral portion at equal intervals in the circumferential direction. In other words, the body of the snap ring 14 has a small area 14b with a cutout 14a.
And a large area portion 14c without the notch 14a. The cross section of the small area portion 14b is semicircular as shown in FIG. Due to its simple shape, snap ring 14
Is easy to machine and does not require high machining accuracy. The inner peripheral side of the snap ring 14 has an annular groove 1 of the extension 13a.
It is fitted to 3c. Here, the large area portion 14c of the snap ring 14 is fitted in the fitting groove 13c.

The wedge collar 15, as shown in FIG.
15a (color body) and a plurality of first claws 20 and second claws 21 protruding from the flange portion 15a. The first nail 20 is
The snap ring 14 is arranged at the same intervals as the circumferential intervals of the notches 14a so that the snap rings 14 can be inserted into the notches 14a. That is, the snap ring 14 is concentrically supported by the wedge collar 15 by the first claw 20. The first nail 20 is
The tip portion has a bent portion 20a protruding in the radial direction, and the bent portion 20a receives a force in the axial direction forward of the snap ring 14. The second claw 21 is in contact with the rear portion in the axial direction of the large area portion 14c of the snap ring 14. That is,
The snap ring 14 is held immovably in the axial direction by the bent portion 20a of the first pawl and the second pawl.

A slip collar 19 is arranged between the wedge collar 15 and the step portion 13b of the extension 13a. The slip collar 19 has a slit (not shown) extending in the axial direction at one location of its tubular wall portion, and can be deformed radially inward and outward. In the state of FIGS. 1 to 3, the slip collar
The end of 19 is in contact with the base of the step 13b.

The lever plate 16 is a flange part that is axially forward and outward.
It has 16a. The flange portion 16a is a support plate
The inner peripheral end 8a of the diaphragm spring 8 is sandwiched between the annular body 23 of 22 and the lever plate.
16 and the inner peripheral end 8a of the diaphragm spring 8 are connected. At the inner peripheral end of the lever plate 16, there is an annular groove 16b which is opened forward in the axial direction. The snap ring 14 is in contact with the annular groove 16b from the front side in the axial direction.

As is clear from the above description, the inner peripheral end portion 8a of the diaphragm spring 8 is connected to the extension portion 13a of the inner race 13 via the lever plate 16 and the snap ring 14. In this case, the connection between the lever plate 16 and the extension 13a is limited to the large area portion 14c of the snap ring 14.
The wedge collar 15 exerts almost no force.

Next, the disassembly / assembly work of the above-mentioned embodiment will be described.

At the time of disassembling, the tip of the release fork 4 is largely moved forward in the axial direction, and the release bearing 12 is moved forward in the axial direction with respect to the diaphragm spring 8. As a result, the wedge collar 15 moves together with the release bearing 12. Here, since the flange portion 15a contacts the annular main body 23, the snap ring 14 is disengaged from the annular groove 16b of the lever plate 16 (Fig. 6). At this time, the first claw 20 and the second claw 21 of the wedge collar 15 snap into the snap ring 14.
Since it is held in the axial direction, the snap ring 14 does not fall off the wedge collar 15.

When the release bearing 12 is pushed further in the axial direction, the snap ring 14 rides on the outer peripheral surface of the slip collar 19 and is disengaged from the annular groove 13c of the extension portion (Fig. 7).

Next, the extension 13 is pulled out from the wedge collar 15. This extraction work is performed by removing the transmission from the engine side. When this withdrawal is done,
The slip collar 19 moves to a position that covers the annular portion 13c of the extension portion 13 while engaging with the inner circumference of the snap ring 14 (FIG. 8). Therefore, the snap ring 14 has the extension 13
Since it does not fit in the annular groove 13c, the extension 24 is disengaged axially rearward from the snap ring 14. In addition, wedge color
The disassembly of 15 and the snap ring 14 can be easily performed by removing the first claw 20 of the wedge collar 15 from the notch 14a of the snap ring 14.

When assembling, release the bearing 12 from the state shown in FIG.
Move forward in the axial direction. As a result, the snap ring 14 is fitted in the annular groove 13c, and the connecting operation is completed. During the assembling work, the snap ring 14 is always held by the first claw 20 and the second claw 21 of the wedge collar 15, so it does not fall off.

Next, the release operation of the above embodiment will be described.

When the tip of the release fork 4 moves to the mission housing 9 side by operating a clutch pedal (not shown), the release bearing 12 also moves rearward in the axial direction. Then, the extension portion 13a of the inner race 13 moves the inner peripheral end portion 8a of the diaphragm spring 8 axially rearward via the snap ring 14 and the support plate 16. As a result, the pressure plate 7 moves rearward,
The clutch 2 is released.

At this time, the force that moves axially rearward of the release bearing 12 is applied to the snap ring 14, but the snap ring 14
Since the large area portion 14c fits into the annular groove 13c on the extension portion 13a side and the annular groove 16b on the support plate 16 side, the extension portion 13a and the support plate 16 are connected with high strength. On the other hand, the force from the release bearing 12 hardly reaches the wedge collar 15. Therefore, the wedge collar 15 is less likely to be damaged, and high processing accuracy is not required.

[Effect of device]

The snap ring support collar according to the present invention holds the snap ring with the first claw and the second claw integrally formed on the collar body. Therefore, according to the present invention, it is possible to provide a snap ring support collar capable of realizing a release device having high durability and easy to manufacture.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a pull type clutch adopting an embodiment of the present invention, FIGS. 2 and 3 are vertical sectional partial views of a release device thereof, and FIG. 4 is a plan view of a snap ring thereof. FIG. 5 is a perspective partial view of the wedge collar, and FIGS. 6 to 8 are views corresponding to FIG. 2 showing different states during disassembly. 3 ... Release device, 8 ... Diaphragm spring,
15 ... Wedge collar, 15a ... Flange part, 20 ... First claw, 20a ... Bent part, 21 ... Second claw.

Claims (1)

[Scope of utility model registration request] 1. A snap ring supporting collar of a release device for moving an inner peripheral portion of a diaphragm spring of a pull type clutch and having a snap ring, the annular collar body being integrally formed with the collar body. A first pawl that holds the snap ring concentrically with the collar body and has a bent portion at the tip, and a second pawl that is integrally formed on the collar body and that sandwiches the snap ring. And, with a snap ring support collar.