JPS6220746Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a clutch outer of a multi-disc clutch used in a power transmission system of an engine for a motorcycle or the like.

Generally, the clutch outer of the multi-disc clutch is formed by die-casting, so as shown in FIG. The concave groove 03 has a draft angle α on both side edges.
is attached. Therefore, if the claw piece a of the clutch disk is inserted into the concave groove 03 as it is, there will be a play b in the circumferential direction of the disk due to the draft angle α.
If the device is used in this state, the pawl a may come into contact with the side edge of the groove 03 due to engine torque fluctuations, etc., causing noise. Conventionally, as a countermeasure to eliminate the above-mentioned problem, a wide groove 03' is formed at the open end of the concave groove 03 of the clutch outer, as shown in FIG. The claw pieces a' of different separately manufactured clutch disks are closely fitted to eliminate play b caused by the draft angle α. However, such a method requires special processing on the clutch outer for purposes other than the clutch's original function, and requires a separate clutch disk, which increases manufacturing costs.

This idea was devised in view of the above circumstances.
The purpose of the present invention is to provide a clutch outer for a multi-disc clutch with a simple structure, which makes it possible to easily remove circumferential looseness of the clutch disc pawl pieces due to the draft angle of the concave groove of the clutch outer body. a crown-shaped clutch outer body having a plurality of concave grooves formed on the circumferential surface of the cylindrical portion so that each claw piece of the clutch disk can be moved in the axial direction of the disk, but can be fitted into the lower part of the clutch disk in the circumferential direction;
The clutch outer body has a ring body that is removably fitted to the outer circumferential surface of the cylindrical portion of the clutch outer body, and the clutch outer body has a draft angle formed in the plurality of grooves due to its casting, and The body is formed to have a size with an interference such that when the body is fitted into the cylindrical portion, the cylindrical portion is contracted and deformed inward to correct the draft angle of the groove.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The clutch outer is composed of a clutch outer body 1 and a ring body 2. As shown in FIG.
The clutch outer main body 1 is formed into a crown shape by die-casting, and on the circumferential surface of the cylindrical portion 1', a large number of clutch disc pawls a are movable in the axial direction of the disc but cannot be moved in the circumferential direction. A plurality of grooves 3 with open edges are formed in order to fit into the clutch outer, and these grooves 3 have draft angles on both sides of the grooves caused by the die-casting process, similar to the conventional clutch outer. α is formed.

Further, the ring body 2 is formed into an annular shape by a band-shaped body having a constant width, and is adapted to be removably fitted to the outer peripheral surface of the cylindrical portion 1' of the clutch outer 1. When the ring body 2 is fitted, the clutch outer The cylindrical portion 1' of the main body 1 is compressed and deformed radially inward to correct the draft angle α of the groove 3, that is, the width of the groove 3 is made substantially equal over its entire length. It is formed to a dimension with a width.

Now, in order to assemble a multi-disc clutch, a plurality of clutch disks are assembled into the clutch outer body 1 as shown in FIG. When the ring body 2 is fitted to the outer circumferential surface of the cylindrical portion 1' of the clutch outer main body 1, the ring body 2 has a tightening allowance for correcting the draft angle α of the groove 3 as described above. 1' is contracted so that both side edges of the concave groove 3 are joined to both side edges of the claw pieces a of a large number of clutch disks so as to be slidable in the disk axial direction,
There is no play between them in the disk circumferential direction.

As described above, according to the present invention, a plurality of concave grooves 3 are provided in which each claw piece a of a large number of clutch disks is fitted into the disk so that the claw pieces a can be moved in the axial direction of the disk but cannot be moved in the circumferential direction. The clutch outer body 1 consists of a crown-shaped clutch outer body 1 formed on the circumferential surface of the cylindrical portion 1', and a ring body 2 that is removably fitted to the outer circumferential surface of the cylindrical portion 1' of the clutch outer body 1. Due to casting, a draft angle α is formed in the plurality of grooves 3, and when the ring body 2 is fitted into the cylindrical portion 1', the cylindrical portion 1' is contracted and deformed inwardly. The groove 3
Since the clutch outer body 1 is formed in a size with a tightness that corrects the draft angle α of the clutch outer body 1, the draft angle α generated in the groove 3 due to the casting of the clutch outer body 1 can be corrected. It can be easily corrected and removed at the same time as it is fitted into the cylindrical portion 1', and each claw piece a of the clutch disk can be accurately fitted into the concave groove 3 without causing play in the circumferential direction of the disk. Because you can
Noise generated from the clutch due to engine torque fluctuations, etc. can be reduced as much as possible, and the axial movement of the clutch disk, as well as the engagement and disengagement of the clutch, can be carried out smoothly and quietly. Moreover, in order to remove the play, there is no need to perform special processing on the clutch outer body or prepare a separate clutch disk as in the conventional method.
Since only an inexpensive ring body 2 is required, the manufacturing cost of the clutch outer can be significantly reduced. Moreover, since the ring body 2 can reinforce the outer peripheral surface of the cylindrical portion 1' of the clutch outer main body 1 and restrict expansion deformation of the cylindrical portion 1', a strong centrifugal force is applied to the cylindrical portion 1' during high speed rotation of the clutch outer ′
There is no need to worry about it being deformed or destroyed even if it acts on it.
As described above, the ring body 2 is also used as a means for correcting the draft angle α for the groove 3 and as a means for reinforcing the clutch outer body cylindrical portion 1', which contributes to simplifying the structure and reducing costs. It's something you get.

[Brief explanation of the drawing]

Figure 1 is an exploded side view of the clutch outer of the present invention.
FIG. 2 is an assembled side view, and FIGS. 3 and 4 are side views of a conventional clutch outer. 1...Clutch outer body, 1'...Cylindrical part,
2...Ring body, 3...Concave groove, a...Claw piece, α...
...Draft.

Claims (1)

[Scope of utility model registration request] A crown-shaped groove 3 is formed on the circumferential surface of the cylindrical portion 1', into which each claw piece a of a large number of clutch disks is fitted, movable in the axial direction of the disk but immovable in the circumferential direction. clutch outer body 1
and the cylindrical portion 1' of the clutch outer main body 1.
The clutch outer body 1 includes a ring body 2 that is removably fitted to the outer peripheral surface, and the clutch outer body 1 has a draft angle α formed in the plurality of grooves 3 due to its casting process. , is formed in a size having a tightening allowance such that when it is fitted into the cylindrical portion 1', the cylindrical portion 1' is contracted and deformed inward to correct the draft angle α of the groove 3. , clutch outer of multi-plate clutch.