JPH01283439A - Multiple disc clutch - Google Patents

Abstract

PURPOSE:To make the assembly and the maintenance similar and easier by threadedly attaching a spring holder to a boss portion of a clutch sleeve hub and providing an intermediary disc spring between this spring holder and a pusher sleeve portion. CONSTITUTION:A cylindrical spring holder 28 is detachably connected with a screw to a periphery of a boss portion 19c of a clutch sleeve hub 19. On a periphery of the spring holder 28, a spring bearing portion 29 is formed. A disc spring 30 is provided between this spring bearing portion 29 and a spring bearing portion 27 formed at a pusher sleeve 25a of a clutch pusher 25. In this way, it is possible to make the assembly and the maintenance simpler and easier without a special tool for attachment or detachment of a disc spring.

Description

Detailed Description of the Invention (Objective of the Invention) (Industrial Application Field) This invention relates to a multi-disc clutch mechanism used in motorcycles, etc., and particularly relates to a multi-disc clutch mechanism using a disc spring as a clutch spring. Regarding.

(Prior art) In motorcycles, the driving force from the engine is transmitted to the rear wheels via a power transmission mechanism, and the driving force from the engine is intermittent in the middle of this power transmission mechanism. A multi-plate clutch mechanism is interposed. As this multi-disc clutch mechanism, one disclosed in Japanese Utility Model Publication No. 57-2736 is known.

A conventional multi-disc clutch mechanism is constructed as shown in FIG. 2, and a clutch sleeve hub 3 is housed in a clutch drum 2 fixed to a drive gear 1. The clutch sleeve hub 3 has a sleeve portion 3a, an outer peripheral flange portion 3b, and a boss portion 3c, and a large number of clutch discs 4 and clutch plates 5 are arranged alternately in an annular space between the sleeve portion 3a and the clutch drum 2. Placed. The clutch sleeve hub 3 is spline-coupled to the rotary shaft 6, and its axial movement is restricted by a tightening nut 7. Note that the drive gear 1 to which the clutch drum 2 is fixed is provided on the rotary shaft 6 so as to freely rotate.

Further, a window portion of an annulus-shaped outer disk 9a of the pressure plate 9 is inserted into a protrusion 8 protruding from the tip of the sleeve portion 3a of the clutch sleeve hub 3, and the outer disk 9a is attached to the clutch sleeve hub 3 so as to rotate integrally. A tongue piece 9b that extends in the axial direction inside the sleeve portion a of the clutch sleeve hub 3 is formed on the outer disk 9a, and a disc spring 10 is disposed between the tip of the tongue piece 9b and the boss portion 3C of the clutch sleeve hub 3. is interposed. The disc spring 10 is fixed with a snap ring 11 as a locking member attached to the boss portion 3C.

On the other hand, the pressure plate 9 has an outer disk 9a
This pressure plate 9 consists of an outer disk 9a and an inner disk 9C that can be attached to and removed from the outer disk 9a.
By operating a clutch release lever (not shown), clutch operating force is transmitted via the rod 12 and piston 13, and the outer disc 9a is moved against the spring force of the disc spring 10 in order to cause the multi-disc clutch mechanism to act as a clutch. It is designed to move backwards.

(Problems to be Solved by the Invention) In the conventional multi-plate clutch mechanism, a disc spring 10 is detachably attached between the boss portion 3C of the clutch sleeve hub 3 and the tongue piece 9b of the pressure plate 9. This disc spring 1
In order to attach and detach the snap ring 11, it is necessary to attach and detach the snap ring 11 to the outer circumferential groove of the boss portion 3C of the clutch sleeve hub 3, and a special tool such as a breather is required to attach and detach the snap ring 11. could not be easily assembled and maintained.

In addition, in order to hold the snap ring 11 in the outer circumferential groove of the boss portion 3C of the clutch sleeve hub 3, it is necessary to improve the material strength of the boss portion 3C of the clutch sleeve hub 3, and the clutch sleeve hub 3 is A plurality of protrusions 8 are required at the tip, and the clutch sleeve hub 3
The sleeve bub structure becomes complicated. Furthermore, since the pressure plate 9 has a plurality of tongues 9b integrally provided on the outer disk 9a, there is a problem in that the disk material between the tongues 9b is wasted and the disk material cannot be used effectively.

This invention has been made in consideration of the above-mentioned circumstances, and aims to provide a multi-disc clutch mechanism that can be easily and easily assembled and maintained without requiring any special tools to attach or detach a disc spring. purpose.

Another object of the present invention is to provide a multi-plate clutch mechanism that is economical because the disc spring is held by a screw holder, so there is no need to use special strength materials for the clutch sleeve hub.

[Structure of the invention]

(Means for Solving the Problems) In order to solve the above-mentioned problems, a multi-disc clutch mechanism according to the present invention accommodates a clutch sleeve hub having a sleeve portion, an outer periphery flange portion, and a boss portion in a clutch drum. In the multi-disc clutch mechanism in which disc plates and clutch plates are alternately arranged in an annular space between the clutch drum and the sleeve portion of the clutch sleeve hub, a clutch busher is rotatably slid in the axial direction on the clutch sleeve hub. The clutch pusher includes a pusher sleeve portion extending axially within the sleeve portion of the clutch sleeve hub, and a disc spring is disposed between the pusher sleeve portion and a spring holder screwed to the boss portion of the clutch sleeve hub. The disk plate and the clutch plate are interposed between the clutch pusher and the outer peripheral flange portion of the clutch sleeve hub by the disc spring.

(Function) In this multi-disc clutch mechanism, a spring holder is screwed to the boss portion of the clutch sleeve hub, and a clutch pusher is provided in the sleeve portion of the clutch sleeve hub so as to be slidable in the axial direction and rotate integrally with the clutch pusher. Since the disc spring is held between the pusher sleeve part and the spring holder, the spring holder can be removably screwed to the boss part of the Clara sleeve hub without using special tools, and the spring holder can be screwed into the boss part of the Clara sleeve hub. By joining and loosening, the film of the disc spring can be easily attached.

At this time, the disc spring is held by a spring holder that is screwed to the boss of the clutch sleeve hub, and is not directly held to the boss of the clutch sleeve hub, so there is no need for special strength materials for the clutch sleeve hub. , ordinary casting materials can be used, resulting in excellent economical efficiency.

(Embodiment) Hereinafter, an embodiment of the multi-disc clutch mechanism according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows an example of a multi-disc clutch mechanism according to the present invention which is incorporated into a power transmission mechanism of a motorcycle or the like. This multi-plate clutch mechanism 15 is provided on a rotating shaft 16 such as a countershaft, for example.

The multi-disc clutch mechanism 15 includes a clutch drum 18 fixed to a drive gear 17 rotatably provided on a rotating shaft 16, and a clutch sleeve hub 19 housed within the clutch drum 18. The clutch sleeve hub 19 includes a sleeve portion 19a1 and an outer peripheral flange portion 19b.
and a boss portion 19G, which is spline-coupled to the rotary shaft 16 so as to rotate integrally with the rotary shaft 16. Axial movement of the clutch sleeve hub 19 is regulated by a tightening nut 20 screwed onto the shaft end of the rotating shaft 16.

On the other hand, the clutch drum 18 and the clutch sleeve hub 19
An annular space 21 is formed between the sleeve portion 19a of
A large number of disc plates 22 and clutch plates 23 are arranged alternately in this annular space 21. The disk plate 22 is spline-coupled to the inner circumferential wall of the clutch drum 18, and is provided to rotate integrally with the clutch drum 18 and to be slidable in the axial direction. Further, the clutch plate 23 is spline-coupled to the outer periphery of the sleeve portion 19a of the clutch sleeve hub 19, and is rotatably integrated with the sleeve portion 19a so as to be slidable in the axial direction.

Further, a clutch pusher 25 is spline-coupled to the sleeve portion 19a of the clutch sleeve hub 19 from the sleeve tip side, and this clutch pusher 25 is provided to rotate integrally with the sleeve portion 19a of the clutch sleeve hub 19 and to be slidable in the axial direction. It will be done. The clutch pusher 25 covers the sleeve portion 19a of the clutch sleeve hub 19 from the distal end side, and includes a pusher sleeve portion 25a extending along the inside of the sleeve portion 19a. The pusher sleeve portion 25a is integrally provided with an inner peripheral 7 flange 26 at its tip, and a spring receiving seat 27 is formed at the inner peripheral portion of the tip of the pusher sleeve portion 25a.

On the outer periphery of the boss portion 19c of the clutch sleeve hub 19,
A cylindrical spring holder 28 is removably screwed together. The spring holder 28 has an outer periphery flange 28a at one end, and a spring receiving seat 29 is formed on the outer periphery of the spring holder 28 on the outer periphery 7 flange 28a side. A disc spring 30 is interposed between this spring receiving seat 29 and a spring receiving seat 27 formed on the pusher sleeve 25a of the clutch pusher 25.

The disc spring 30 always biases the clutch pusher 25 toward the outer periphery 7 flange portion 19b of the clutch sleeve hub 19, and the spring force of the disc spring 30 causes the clutch pusher 25 to move between the outer periphery flange portion 19b and the clutch pusher 25. The disc plate 22 and the clutch plate 23 are compressed and torque is transmitted.

In addition, the pusher sleeve portion 25 of the clutch pusher 25
A release disc 32 is detachably provided on the base opening side of the pusher sleeve 5a, and the release disc 32 is mounted inside the pusher sleeve portion 5a by a stopper 33 such as a retaining ring or a snap ring. The release disc 32 is engaged with the outer periphery 7 flange 34a of the piston 34 in a free-rotation manner.
6 so as to be slidable in the axial direction. The piston 34
is linked to a clutch release lever (not shown) via an operating rod 37.

Note that reference numeral 38 is a driven gear meshed with the drive gear 17, and this driven gear 38 is fixed to a driven shaft 39.

This multi-disc clutch mechanism 15 is configured as described above, and when the clutch release lever is not operated, the spring force of the disc spring 30 acts on the clutch pusher 25, and this clutch pusher 25 is attached to the outer peripheral flange of the clutch sleeve hub 19. The disc plate 22 and the clutch plate 23 are compressed between the clutch plate 22 and the portion 19b, and torque is transmitted.

Further, by operating the clutch release lever, the piston 34 is moved to the right side in FIG. 1 via the operating rod 37. The release disc 32 follows this movement of the piston 34, and the release disc 32 moves the clutch pusher 25 via the stopper 33 to the disc spring 3.
Retract against the spring force of 0. As a result, the pressure contact between the disc plate 22 and the clutch plate 23 is released, the clutch acts, and no torque is transmitted.

On the other hand, when assembling the multi-disc clutch mechanism 15, the clutch drum 18 is fixed to the drive gear 17, and the clutch sleeve hub 19 is spline-coupled to the rotating shaft 16 and fixed with a tightening nut 20. Sleeve portion 1 of clutch sleeve hub 19
Clutch plates 23 and disc plates 22 are alternately arranged in the annular space 21 between the clutch plate 9a and the clutch plate 9a. Next, the clutch pusher 25 is inserted from the tip side of the sleeve portion 19a, and the clutch pusher 25 is inserted into the sleeve portion 19a.
A is rotated integrally with the spline.

Subsequently, the disc spring 30 is interposed in the pusher sleeve portion 5a of the clutch pusher 25, and the spring holder 28 is screwed to the boss portion 19C of the clutch sleeve hub 19.
The disc spring 30 is interposed and held between the pusher sleeve portion 25a and the spring holder 28, or the disc spring 30 is attached to the spring holder 28 in advance and the spring holder 28 is attached to the clutch sleeve hub 19. The disc spring 30 is held by being screwed to the boss portion 19c.

Thereafter, the release disk 32 is attached to the outer peripheral flange 34a of the piston 34 in a free rotation manner, and the release disk 32 is installed at the inner base of the pusher sleeve portion 25 of the clutch pusher 25 using the stopper 33, thereby assembling the multi-disc clutch mechanism 15. is completed. When disassembling the multi-disc clutch mechanism 15 for maintenance, it is sufficient to perform the operations in the reverse order of the navy blue attachment.

When assembling the multi-disc clutch mechanism 15 or preparing the surfaces, it is necessary to force the disc spring 30 into position, but the disc spring 30 can be attached or removed using a press by connecting the spring holder 28 with a screw or by warming the screw. This can be easily done through the opening of the pusher sleeve portion 25a of the clutch pusher 25 without using a special tool such as a machine. At that time, by forming unevenness like a bolt head along the outer periphery of the outer periphery flange 28a of the spring holder 28, the spring holder 28 is
The screw connection of the clutch sleeve hub 19 of No. 8 to the boss portion 19C can be more easily performed.

〔Effect of the invention〕

In the multi-disc clutch Ia structure according to the present invention, a spring holder is screwed to the boss part of the clutch sleeve hub, and a disc spring is interposed between the spring holder and the pusher sleeve part of the clutch pusher. The disc spring is housed in the pusher sleeve and can shorten the axial dimension of the multi-disc clutch mechanism, while the disc spring can be attached and detached by screwing the spring holder to the boss of the clutch sleeve hub or loosening the screw. , can be done simply and easily without the use of special tools.

In addition, since this multi-disc clutch mechanism holds the disc spring with a screw holder screwed to the boss part of the clutch sleeve hub, there is no need to directly hold the disc spring with the boss part of the clutch sleeve hub. Ordinary casting materials can be used without using special strength materials,
It has effects such as excellent economic efficiency.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of a multi-disc clutch mechanism according to the present invention, and FIG. 2 is a sectional view showing a conventional multi-disc clutch mechanism. DESCRIPTION OF SYMBOLS 15... Multi-plate clutch mechanism, 16... Rotating shaft, 17... Drive gear, 18... Clutch drum, one... Clutch sleeve hub, 19a... Sleeve part, 19b... Outer flange portion, 19c... Boss portion, 20... Tightening nut, 21... Annular space, 2
2... Disc plate, 23... Clutch plate, 25... Clutch pusher, 25a... Pusher sleeve portion, 26... Inner periphery flange, 27... Spring receiving seat, 28... Spring Holder, 29... Spring receiver, 30... Belleville spring, 32... Release disc,
33...stopper, 34...piston. Applicant's agent Hisashi Hatano Figure 1 Figure 2

Claims (1)

[Claims] 1. A clutch sleeve hub having a sleeve portion, an outer periphery flange portion, and a boss portion is accommodated in the clutch drum;
In the multi-disc clutch mechanism in which disc plates and clutch plates are arranged alternately in the annular space between the clutch drum and the sleeve portion of the clutch sleeve hub, a clutch pusher is rotated integrally with the clutch sleeve hub and slides in the axial direction. The clutch pusher includes a pusher sleeve portion extending axially within the sleeve portion of the clutch sleeve hub, and a disc spring is disposed between the pusher sleeve portion and a spring holder screwed to the boss portion of the clutch sleeve hub. A multi-disc clutch mechanism, characterized in that the disc plate and the clutch plate are interposed between the clutch pusher and the outer periphery flange of the clutch sleeve hub by the disc spring. 2. The disc spring is provided between a spring receiving seat formed on the inner periphery of the tip of the pusher sleeve portion of the clutch pusher and a spring receiving seat formed on the outer periphery of the spring holder, and the spring holder and the disc spring are provided on the clutch pusher. The multi-disc clutch mechanism according to claim 1, wherein the multi-disc clutch mechanism is mounted so as to be freely inserted and removed through an opening in a sleeve portion of the pusher. 3. The multi-disc clutch mechanism according to claim 1, wherein a release disc linked to the clutch release lever is detachably provided on the base side of the pusher sleeve portion of the clutch pusher.