JPS6139849Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a noise prevention device for a multi-disc clutch.

In a multi-plate clutch, the outer peripheral protrusion of the driving friction plate is slidably inserted in the window of the clutch housing in the axial direction.
Insert the inner circumferential protrusion of the driven friction plate into the window of the sleeve hub so that it can slide freely in the axial direction, stack the driving friction plate and the driven friction plate alternately, press one side with a holding plate, and press the driving friction plate and the driven friction plate. Power is transmitted through the friction of dynamic friction plates. When the presser plate is released, a gap is created between the driving friction plate and the driven friction plate, cutting off power transmission and disengaging the clutch. When this clutch is disengaged, if there is a rotational fluctuation in the clutch housing, the end face of the drive friction plate will repeatedly collide with and separate from the end face of the window of the clutch housing, producing a rattling noise that is unpleasant. be.

In view of this point, this invention has been improved to prevent the generation of noise, and an embodiment of the invention shown in the drawings will be described below.

The drive friction plate 4 and the outer peripheral protrusion 5 are inserted into the window 3 of the clutch housing 2 connected to the drive gear 1.
On the other hand, the window 8 of the sleeve hub 7 connected to the driven shaft 6
Insert the inner circumferential protrusion 10 of the driven friction plate 9. Then, a plurality of driving friction plates 4 and driven friction plates 9 are stacked alternately, a press plate 11 is placed on the outside, and a clutch spring 12 is used to press the plate. Press button 13,
When the presser plate 11 is released outwardly against the clutch spring 12 via the bush piece 14, a gap is created between the driving friction plate 4 and the driven friction plate 9, and the clutch is disengaged. The above is the structure of a normal multi-disc clutch.
Therefore, in the present invention, a continuous chevron-shaped elastic strip 15 made of rubber or the like is connected in a zigzag manner to the outer circumferential protrusion 5 of a plurality of driving friction plates 4 stacked on top of each other via the driven friction plates 9. match. That is, as shown in FIG. 4, the outer circumferential protrusions 5 are sequentially inserted into both the left and right recesses of the continuous chevron-shaped elastic strip 15. and,
When the outer circumferential protrusion 5 of the drive friction plate 4 is inserted into the window 3 of the clutch housing 2, the elasticity of the elastic strip 15 urges the adjacent drive friction plates 4 in opposite directions in the circumferential direction. The end surfaces of the outer circumferential protrusions 5 of the adjacent drive friction plates 4 are alternately and lightly pressed against the mutually opposite inner surfaces of the windows 3 (FIGS. 2 and 3).

The effect will be explained.

When the driving friction plate 4 and the driven friction plate 9 are pressed by the holding plate 11 and are brought into close contact, the clutch is connected;
The clutch housing 2, driving friction plate 4, driven friction plate 9, and sleeve hub 7 rotate together, and no noise is generated. When the presser plate 11 is released, the drive friction plate 4
A gap is created between the driven friction plate 9 and the driven friction plate 9, the driven friction plate 9 stops, and the driving friction plate 4 rotates together with the clutch housing 2. Even if there is rotational fluctuation at this time,
The side edges of the outer circumferential projections 5 of the drive friction plate 4 are alternately and lightly pressed against slight gaps in the rotational direction of the window 3 by the elastic strips 15, so that no difference in rotation occurs. No collision or separation,
Noise generation can be prevented.

As explained above, this invention involves inserting the outer peripheral protrusion of the drive friction plate into the window of the clutch housing.
In a multi-plate clutch in which the inner protrusion of the driven friction plate is inserted into the window of the sleeve hub, multiple driving friction plates and driven friction plates are stacked alternately and pressed together with a presser plate to transmit power. Elastic strips formed in a continuous mountain shape are engaged in a zigzag shape on the outer circumferential protrusions of a plurality of driving friction plates stacked on top of each other via driven friction plates, and adjacent driving friction plates are arranged in opposite directions in the circumferential direction. Since the force is applied in the opposite direction, when the clutch is disengaged,
The outer circumferential protrusion of the drive friction plate is alternately lightly pressed against both sides of the window of the clutch housing, so that even if there is rotational fluctuation in the clutch housing, the drive friction plate will follow and will not collide with the end face of the window. They do not move away from each other, and noise caused by collision sounds can be prevented. Moreover, since only the elastic strips are added, the cost increase is also small.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a longitudinal cross-sectional view, Fig. 2 is a partial plan view, Fig. 3 is a partially enlarged side view, and Fig. 4 shows an elastic strip on the outer peripheral protrusion of the drive friction plate. FIG. 2...Clutch housing, 3...Window, 4...
Driving friction plate, 5...outer circumference protrusion, 7...sleeve hub, 8...window, 9...driven friction plate, 10...inner circumference protrusion, 11...pressing plate, 15...elastic strip.

Claims (1)

[Scope of utility model registration request] Insert the outer circumferential protrusion of the driving friction plate into the window of the clutch housing, insert the inner circumferential protrusion of the driven friction plate into the window of the sleeve hub, stack multiple driving friction plates and driven friction plates alternately, and press with a presser plate. In a multi-plate clutch that is pressed together to transmit power, elastic stripes formed in a continuous mountain shape are formed in a zigzag shape on the outer circumferential protrusion of a plurality of driving friction plates that are overlapped with each other via a driven friction plate. 1. A noise prevention device for a multi-plate clutch, characterized in that the drive friction plates are engaged with each other so as to urge adjacent drive friction plates in opposite directions in the circumferential direction.