JP2001107979A - Multiple disk clutch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multiple disk clutch device of improving assembling workability by smoothly engaging the outer spline tooth of a clutch hub and the spline groove of the inner clutch plate. SOLUTION: In this multiple disk clutch device, inner and outer clutch plates 1 and 2 are arranged alternately by plural, and a spline groove 1b is provided on the inner diameter part of the plate 1 to be movably engaged with the outer spline tooth 3a of a clutch hub 3 in an axial direction. A projection 3c having a round surface abutting on the side surface of the diameter part 1a of the plate 1 is formed on the axial directional end part of the tooth 3a of the hub 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a multi-plate clutch device,
In particular, the present invention relates to an assembly structure of an inner clutch plate and a clutch hub.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 1, a multi-plate clutch device has a plurality of inner clutch plates 1 and outer clutch plates 2 arranged alternately, and a spline groove is formed in the inner diameter portion of the inner clutch plate 1. This spline groove is axially movably engaged with the outer spline teeth 3a of the clutch hub 3, and a spline groove is provided in the outer diameter portion of the outer clutch plate 2, and this spline groove is connected to the inner spline of the clutch drum 4. It is structured to engage with the teeth 4a so as to be movable in the axial direction. In this example, the housing also serves as the clutch drum 4 and is configured as a brake device. In addition, 5 is a piston and 6 is a return spring.

When assembling a multi-plate clutch device,
First, the spline grooves of the outer clutch plate 2 are engaged with the inner spline teeth 4a of the clutch drum 4 while alternately arranging the spline grooves with the inner clutch plate 1, and then the clutch hub 3 is engaged with the spline grooves of the inner clutch plate 1. It is customary to incorporate it.

[0004]

By the way, since the inner clutch plates 1 before the clutch hub 3 is assembled have a dimensional margin in the radial direction, the individual inner clutch plates 1 are not always aligned at the center position. In order to incorporate the clutch hub 3 into such a plurality of inner clutch plates 1,
There is known a clutch hub 3 in which a tapered surface 3b is formed on the outer peripheral surface of the distal end portion so as to guide the inner clutch plate 1 to the center position as the clutch hub 3 is inserted.

Further, since the rotational positions of the spline grooves of the inner clutch plates 1 before the clutch hub 3 is assembled are not aligned, the outer spline teeth 3a of the clutch hub 3 are engaged with the spline grooves of the inner clutch plate 1. At this time, it is necessary to push the clutch hub 3 while rotating it. However, as shown in FIG. 2, the tapered surface 3b of the clutch hub 3
Since the inner clutch plate 1 and the inner diameter portion 1a of the inner clutch plate 1 are in contact with the edge, the inner clutch plate 1 rotates together with the clutch hub 3, and a problem occurs in that the outer spline teeth 3a and the spline grooves do not smoothly engage. In addition, since the operation of engaging the outer spline teeth 3a with the spline grooves must be performed on all the inner clutch plates 1, the assembling work of the clutch hub 1 requires a great deal of labor.

Accordingly, an object of the present invention is to provide a multi-plate clutch device in which the outer spline teeth of the clutch hub can be smoothly engaged with the spline grooves of the inner clutch plate, and the assembling workability is improved. It is in.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a plurality of inner clutch plates and outer clutch plates are alternately arranged, and a plurality of inner clutch plates and an outer clutch plate are provided at an inner diameter portion of the inner clutch plate. In a multi-plate clutch device in which a spline groove is provided, and the spline groove is axially movably engaged with the outer spline teeth of the clutch hub, an inner clutch plate is provided at an axial end of the outer spline teeth of the clutch hub. Provided is a multi-plate clutch device, characterized in that a protrusion having an R surface that can be brought into contact with an inner diameter side surface is formed.

When assembling the multi-plate clutch device of the present invention, first, the spline grooves of the outer diameter portion of the outer clutch plate are engaged with the inner spline teeth of the clutch drum while alternately arranging the spline grooves with the inner clutch plate. While rotating the clutch hub, the outer spline teeth are engaged with the spline grooves on the inner diameter of the inner clutch plate. At this time, the protrusion having an R surface formed at the axial end of the spline teeth of the clutch hub abuts against the side surface of the inner diameter portion of the inner clutch plate, causing relative slip, and the clutch hub and the inner clutch plate rotate together. Can be prevented. Therefore, the outer spline teeth of the clutch hub and the spline grooves of the inner clutch plate smoothly engage,
The assemblability of the clutch hub can be greatly improved.

[0009]

3 and 4 show an example of a multi-plate clutch device according to the present invention, particularly showing a state in which a clutch hub is assembled. 3, the same components as those in FIG. 1 are denoted by the same reference numerals, and a duplicate description will be omitted.

An outer spline tooth 3a is formed on the outer peripheral surface of the clutch hub 3, and a protrusion having an R surface at an axial end of the spline tooth 3a can be brought into contact with a side surface of the inner diameter portion 1a of the inner clutch plate 1. A portion 3c is formed.

In order to incorporate the clutch hub 3, the outer spline teeth 3 a and the spline grooves 1 b of the inner clutch plate 1 are engaged while rotating the clutch hub 3. Since the protrusion 3c having the contact portion first contacts the side surface of the inner diameter portion 1a of the inner clutch plate 1, a relative slip occurs between the protrusion 3c and the inner diameter portion 1a,
It is possible to prevent the clutch hub 3 and the inner clutch plate 1 from rotating together. Therefore, the outer spline teeth 3a of the clutch hub 3 and the spline grooves 1b of the inner clutch plate 1 smoothly engage, and the assemblability of the clutch hub 3 is improved.

In the above embodiment, the protrusion 3 of the clutch hub 3
c protrudes forward (toward the inner clutch plate 1) from the bottom 3d of the outer spline teeth 3a. Therefore, when the clutch hub 3 is inserted, first, the projection 3c is
When the clutch hub 3 is rotated, the sliding resistance between the clutch hub 3 and the inner clutch plate 1 is very small, and the engagement between the outer spline teeth 3a and the spline grooves 1b becomes very easy.

In general, the clutch hub 3 is formed by forging, and after forging, the tip of the outer spline teeth 3a is cut into a desired shape. No extra cost is required to process the projection 3c.

The shape of the clutch hub 3 according to the present invention is not limited to the shape as shown in FIG. 4, and the tooth bottom 3d is formed as shown in FIG.
c, and a tapered surface 3e may be formed on the outer peripheral surface of the tooth bottom 3d. In this case, since the inner clutch plate 1 is guided to the center position by the tapered surface 3e as the clutch hub 3 is inserted, even if the positions of the inner clutch plate 1 are not aligned in the radial direction, the clutch hub 3 is smoothly moved. Can be incorporated into

In the above-described embodiment, an example is shown in which the housing is configured as a brake device also serving as the clutch drum 4. However, it is needless to say that the housing may be configured as a normal clutch device in which the clutch drum rotates. is there.

[0016]

As is apparent from the above description, according to the present invention, since a projection having an R surface is formed at the axial end of the outer spline teeth of the clutch hub, when the clutch hub is assembled, the protrusion is formed. The protrusion abuts against the side surface of the inner diameter portion of the inner clutch plate to cause relative slip, thereby preventing the clutch hub and the inner clutch plate from rotating together. For this reason, the outer spline teeth of the clutch hub and the spline grooves of the inner clutch plate are smoothly engaged with each other, so that the assemblability of the clutch hub can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of an example of a conventional multi-plate clutch device.

FIG. 2 is a cross-sectional view of the multi-plate clutch device of FIG. 1 when a clutch hub is assembled.

FIG. 3 is a cross-sectional view of the multiple disc clutch device according to the present invention when the clutch hub is assembled.

FIG. 4 is an enlarged view of a portion A in FIG. 3;

FIG. 5 is a partially enlarged view of another embodiment of the clutch hub according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inner clutch board 1a Spline groove 1b Inner diameter part 2 Outer clutch board 3 Clutch hub 3a Outer spline teeth 3c Projection 4 Clutch drum

Claims (1)

[Claims] An inner clutch plate and an outer clutch plate are alternately arranged in plurals, and a spline groove is provided in an inner diameter portion of the inner clutch plate, and the spline groove is axially moved to an outer spline tooth of a clutch hub. In the multi-plate clutch device which is engaged as much as possible, a protrusion having an R surface which can be brought into contact with the side surface of the inner diameter portion of the inner clutch plate is formed at the axial end of the outer spline teeth of the clutch hub. Multi-plate clutch device.