JPS6011300Y2 - centrifugal clutch - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a centrifugal clutch used in small engines such as chain saws and brush cutters.

Conventionally, this type of centrifugal clutch has a gap between the outer periphery of the spindle, which is fixed to the rotating plate with a nut, etc., and the fitting hole of the clutch shoe. The clutch sure opens and closes several times during one rotation.

At this time, there was a drawback that a tapping sound was generated between the support shaft and the clutch shoe, and the clutch shoes also generated a tapping noise.

In view of this point, the present invention eliminates the above-mentioned tapping and hammering sounds by providing an elastic body in the gap between the outer periphery of the spindle fixed to the rotating plate and the fitting hole of the clutch shoe. The present invention aims to provide a centrifugal clutch that can reduce noise.

Hereinafter, one embodiment of the present invention will be described in detail using the drawings.

In the figure, the centrifugal clutch 1 is constructed as follows.

The rotating plate 5 fixed to the drive shaft 3 has a support shaft 11.11 fixed to the rotating plate 5 by washers 7, 7 and nuts 9, 9 at a symmetrical position with respect to the center point of the rotating plate 5. A clutch shoe 13.13 is provided on the support shaft 11.11.
Fitting holes 15, 15 provided at one end are rotatably fitted.

Head 17.17 of spindle 11.11 and clutch shoe 13
．． A spring washer-like elastic body 19, 19, as shown in FIGS. 3 and 4, is pressed between the holes 13.

The opposing clutch shoes 13 and 13 are respectively locked at both ends of the elastic machine 21, and due to the elastic force of the elastic machine 21, the end of the clutch shoe 13 comes into contact with the end of the opposing clutch shoe 13 on the support shaft side. Retained.

The inner circumferential surface of the clutch drum 25 fixed to the driven shaft 23 provided on the same line as the drive shaft 3 is provided with an appropriate distance from the lining 27.27 fixed to the outer periphery of the clutch shoe 13.13. .

29 is a fitting hole 1 between the outer periphery of the support shaft 11 and the clutch shoe 13
It is an elastic body that is elastically mounted between the body 5 and the body 5, and is formed by bending an elastic metal plate.

In the above configuration, when the engine (not shown) is driven, the rotary plate 5 rotates as the drive shaft 3 rotates.

Due to the centrifugal force caused by the rotation of the rotary plate 5, the clutch shoes 13.13 rotate outward about the support shafts 11, 11 against the bullets 21, and the linings 27.27 rotate the clutch drums 25, 25): : Pressure contact.

Therefore, the rotation of the drive shaft 3 is 25.25
The signal is transmitted to the driven shaft 23 fixed to the shaft, and the driven shaft 23 is driven to rotate.

Next, when the engine (not shown) is stopped, the centrifugal force is weakened as the rotational speed of the rotary plate 5 is reduced, and the clutch shoes 13, 13 are applied to the support shaft by the biasing force of the bullet 21 (7).
1.11, and comes into contact with the end of the opposing clutch shoe 13.13 on the support shaft side.

That is, the clutch drum 25 and the lining 27 are completely separated, returning to the state before rotation, and the clutch is disengaged.

When the centrifugal clutch 1 described above operates, an elastic body 2 is inserted between the outer periphery of the support shaft 11 and the fitting hole 15 of the clutch shoe 13.
9, the impact between the clutch shoe 13 and the support shaft 11 is buffered, thereby preventing noise such as banging noise.

As described above, the present invention includes a rotary plate fixed to a drive shaft and a clutch drum fixed to a driven shaft on the same axis and 6 lines as the drive shaft, and a clutch drum is rotatably attached to a support shaft fixed to the rotary plate. A clutch shoe is supported and pressed against the inner surface of the clutch drum against an elastic force by centrifugal force, and an elastic body is provided elastically between the outer periphery of the support shaft and the fitting hole of the clutch shoe. Since it is a centrifugal clutch, it is possible to prevent the clapping noise caused by the gap between the spindle and the clutch shoe.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be implemented in other embodiments as well.

[Brief explanation of the drawing]

Fig. 1 is a front cross-sectional explanatory view of one embodiment of the present invention, Fig. 2 is a side cross-sectional explanatory view, Fig. 3 is a front explanatory view of the main parts, and Fig. 4 is a cross-sectional view taken along the line IV-IV in Fig. 3. FIG. 5 is a side cross-sectional view of other important parts, and FIG. 6 is a perspective view of the same important parts. Explanation of the symbols representing the main parts of the drawing, 3...
Drive shaft, 5... Rotating plate, 11... Support shaft, 13... Clutch shoe, 15...
Fitting hole, 21... Bullet machine, 23... Driven shaft, 25... Clutch drum, 29...
・Elastic body.

Claims (1)

[Scope of utility model registration request] A rotary plate 5 fixed to the drive shaft 3 and a clutch drum 25 fixed to a driven shaft 23 on the same axis as the drive shaft 3 are provided, and the clutch drum 25 is rotatably supported by a support shaft 11 fixed to the rotary plate 5. , a clutch shoe 13.13 is provided which presses against the inner surface of the clutch drum 25 against the elastic device 21 by centrifugal force, and an elastic body is provided between the outer periphery of the support shaft 11 and the fitting hole 15 of the clutch shoe 13. A centrifugal clutch characterized by being equipped with 29 bullets.