JP2587587Y2 - Multi-plate clutch - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-plate clutch, and more particularly to a multi-plate clutch used for an automatic transmission.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional multi-plate clutch for an automatic transmission. In the figure, reference numeral 1 denotes a clutch drum to which the power of the engine is transmitted. An engagement tooth 5 is formed on an outer peripheral edge of an internal spline 3 formed on an inner peripheral surface of a side wall 2 of the clutch drum 1. A clutch plate 4 is mounted slidably in the axial direction.
A driven plate 6 is provided between the clutch plates 4.
The piston 7 slidably disposed on the clutch drum 1 slides in the clutch axial direction, and the clutch plate 4 and the driven plate 6 are pressed to transmit power. It has become. The clutch plate 4
Is prevented from being disengaged from the clutch drum 1 by a stopper ring 8 provided on the internal spline 3. A device provided with such a stopper ring is disclosed in, for example, Japanese Utility Model Laid-Open No. 3-52429. ing.

[0003]

Generally, an automatic transmission is required to be as small as possible because of a small mounting space. For this purpose, it is important to reduce the outer diameter of the multi-plate clutch. Issues. FIG. 4 is an enlarged view of a mounting portion of a stopper ring 8 of the conventional clutch drum 1, and the stopper ring 8 is mounted on a ring groove 9. Generally, the outer diameter D of the clutch drum 1
Are the inner diameter d of the tip 3a of the internal spline 3 determined by the size of the clutch plate 4, and the stopper ring 8
Is determined by the depth a of the ring groove 9 which is required for preventing disengagement and settling, and the thickness b of the ring groove 9 portion determined by the pressing load of the piston 7. Where e and f are
E is a clearance required for the clutch plate 4 to slide on the internal spline 3, e is an operating clearance between the tooth tip 5a of the engagement tooth 5 and the root 3b of the internal spline 3, and f is an engagement tooth. 5 is an operation gap between the tooth bottom 5b of the fifth tooth and the tooth tip 3a of the internal spline 3. However, in the conventional clutch drum 1, since the inner diameter of the tooth tip 3 a of the internal spline 3 is the same dimension d on the open end side and the non-open end side of the stopper ring 8, the outer diameter D of the clutch drum 1 is D = d + 2 (a + b),
Even if an extra gap g other than the working gap e exists between the tooth tip 5a of the engagement tooth 5 and the root 3b of the internal spline 3, the size of the clutch plate 4 and the pressing load of the piston 7 can be reduced. Unless changed, the outer diameter D of the clutch drum 1 could not be reduced. Therefore, an object of the present invention is to provide a multiple disc clutch device that can reduce the outer diameter of the clutch drum.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention forms an internal spline formed on an inner peripheral surface of a clutch drum, and an engaging tooth which is engaged with the internal spline. A multi-plate clutch comprising: a clutch plate slidably supported by the drum in the axial direction; and a stopper ring provided on the internal spline in order to prevent the clutch plate from separating from the clutch drum. The inner diameter d1 of the tooth tip on the open end side from the stopper ring of the internal spline, and the inner diameter d2 of the tooth tip on the non-open end side
And the relationship between the outer diameter d3 of the root of the engaging tooth and d2> d
1> d3.

[0005]

According to the multi-plate clutch according to the present invention, the inner diameter d of the tooth tip on the open end side from the stopper ring of the internal spline.
1, the relationship between the inner diameter d2 of the tooth tip on the non-open end side and the outer diameter d3 of the tooth bottom of the engaging teeth of the clutch plate is expressed as d2>d1>.
Since it was d3, the tooth tip of the engagement tooth of the clutch plate
An extra gap between the inner spline of the clutch drum and the tooth bottom can be eliminated, and the outer diameter of the clutch drum can be reduced.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 and 2 are views for explaining a multi-plate clutch according to an embodiment of the present invention. FIG. 1 is a sectional side view of a clutch drum of the multi-plate clutch, and FIG. 2 is a mounting portion of the stopper ring of FIG. FIG. In FIG. 1, 1
Is a clutch drum to which the power of the engine is transmitted,
On the inner peripheral surface of the cylindrical side wall 2 of the clutch drum 1, a large number of internal splines 3 are formed at a predetermined pitch. A clutch plate 4 having engagement teeth 5 formed on the outer peripheral edge is engaged with the internal spline 3 so as to be slidable in the axial direction and to rotate together with the clutch drum 1. A driven plate 6 is interposed between the drive plates 4 and 4, and an inner peripheral edge of the driven plate 6 is engaged with an inner drum (not shown). A cylinder 11 is formed on the bottom wall 10 of the clutch drum 1 in the clutch axial direction, and a piston 7 is slidably disposed in the cylinder 11.
The piston 7 is annular, and an oil chamber 12 is formed by the bottom surface of the piston 7 and the bottom surface of the cylinder 11. The piston 7 is attached to the bottom wall 10 by a spring 13.
When hydraulic oil is supplied into the oil chamber 12, the piston 7 slides in the clutch axial direction, and the clutch plate 4 and the driven plate 6 are pressed to transmit power. . In order to prevent the clutch plate 4 from being detached from the clutch drum 1, a stopper ring 8 is attached to the internal spline 3 in a ring groove 9 provided in the internal spline 3.

As shown in FIG. 2, the mounting portion of the stopper ring 8 is provided with a step g by an end tooth 31 on the open end side and a back tooth 32 on the non-open end side of the stopper ring 8 of the internal spline 3. I have. Further, a is the depth of the ring groove 9, b is the thickness of the ring groove 9, and e and f are the operating gaps of the clutch plate 4. Here, the inner diameter of the tip 31a of the end teeth 31 is d1, the inner diameter of the tip 32a of the rear teeth 32 is d2, the outer diameter of the root 5b of the engaging teeth 5 of the clutch plate 4 is d3, and the outer diameter of the clutch drum is If D1 is assumed, d3 is d3 in order to assemble the clutch plate 4 from the open end of the clutch drum 1.
1 is smaller than d1, and d1 is a step g larger than d2.
Is shorter by 2 g. Therefore, the inner diameter d1 of the tip 31a of the end tooth 31, the inner diameter d2 of the tip 32a of the back tooth 32, and the outer diameter d3 of the root 5b of the engaging tooth 5
Is such that d2>d1> d3. The imaginary line indicates a conventional clutch drum, and D indicates the outside diameter of the conventional clutch drum.

Next, the operation and effect of this embodiment will be described. In the clutch drum 1 according to the present embodiment, the end teeth 31 on the open end side and the back teeth 3 on the non-open end side with respect to the stopper ring 8.
2, the step g is provided, so that in the conventional clutch drum, the tip 5a of the engaging tooth 5 and the internal spline 3
It is possible to eliminate an extra gap g other than the working gap e, which is present between the tooth bottoms 3b, and to show an imaginary line without changing the size of the clutch plate 4, the pressing load of the piston 7, and the like. Compared to the outer diameter D of the conventional clutch drum, D
1 = D−2e, and the outer diameter D1 of the clutch drum 1 can be reduced by 2e.

[0009]

As described above, according to the multi-plate clutch according to the present invention, the inner diameter d1 of the tooth tip on the open end side from the stopper ring of the internal spline and the inner diameter d of the tooth tip on the non-open end side are provided.
Since the relationship between 2 and the outer diameter d3 of the root of the engaging teeth of the clutch plate is d2>d1> d3, the tooth tip of the engaging teeth of the clutch plate and the root of the internal spline of the clutch drum are different from each other. An extra gap between them can be eliminated, and the outer diameter of the clutch drum can be reduced without changing the size of the clutch plate, the pressing load of the piston, and the like.

[Brief description of the drawings]

FIG. 1 is a sectional side view of a clutch drum of a multiple disc clutch according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a mounting portion of a stopper ring in FIG.

FIG. 3 is a cross-sectional side view of a clutch drum of a conventional multi-plate clutch.

FIG. 4 is an enlarged view of a mounting portion of a stopper ring in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clutch drum 3 Internal tooth spline 31a Tooth tip (tooth at open end side) 32a Tooth tip (tooth at non-open end side) 4 Clutch plate 5 Engagement tooth 5b Bottom of tooth (bottom of engagement tooth) 8 Stopper ring

Claims (1)

(57) [Scope of request for utility model registration] An internal spline formed on an inner peripheral surface of a clutch drum, and a clutch plate formed with engagement teeth engaged with the internal spline and supported on the clutch drum so as to be slidable in the axial direction. In order to prevent the clutch plate from being disengaged from the clutch drum, in a multi-plate clutch provided with a stopper ring provided on the internal spline, a tooth tip on the open end side of the stopper ring of the internal spline is provided. Inner diameter d1 and inner diameter d of the tooth tip on the non-open end side
2 and the outer diameter d3 of the tooth bottom of the engaging teeth is represented by d2>
A multi-plate clutch, wherein d1> d3.