JPH0791543A - Clutch device for automobile - Google Patents

Abstract

PURPOSE:To prevent the generation of burning of a brake band by providing lubricating oil supplying holes, which communicate inside with outside, in the peripheral wall of a clutch drum, and providing plural recessed grooves, which are communicated with the lubricating oil supplying holes and which are extended along the axial direction of the peripheral wall, on the outer peripheral surface of the peripheral wall. CONSTITUTION:In a clutch drum 10, plural spline grooves 10d are formed on the inner peripheral surface of a peripheral wall 10c, and these spline grooves 10d form a gear, in which recessed parts and projecting parts are continued on the inner peripheral surface of the peripheral wall 10c. A brake band 12 is arranged near along the outer surface of the peripheral wall 10c of the clutch drum 10, and the brake band 12 is driven by an actuator 10 in the direction for fastening the peripheral wall 10c to restrict the rotation of the clutch drum 10. In this case, plural lubricating oil supplying holes 10e are provided in the peripheral wall 10c in the circumferential direction and the axial direction with a predetermined space. Recessed grooves 10f communicated with the lubricating oil supplying holes 10e are provided on the outer surface of the peripheral wall 10c to prevent the generation of burning of the brake band 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle clutch device, and more particularly to a vehicle clutch device using an automatic transmission.

[0002]

2. Description of the Related Art In recent years, relatively many automobiles are equipped with an automatic transmission instead of a manual transmission. A wet multi-plate clutch device is provided in such an automatic transmission for an automobile. 5 to 7 show an example of the clutch drum in the wet multi-plate clutch device provided in the automatic transmission. The clutch device shown in the figure includes a clutch drum 1 and a brake band 2.

The clutch drum 1 is, for example, a metal plate that is pressed so that the overall shape is a substantially hollow cylindrical shape, and is concentrically arranged on the inner and outer peripheral edges of the ring-shaped main body 1a. Inner and outer peripheral wall portions 1b and 1c of the circumferential shape are formed upright. On the inner peripheral surface of the outer peripheral wall portion 1c, a plurality of spline grooves 1d are axially formed at intervals along the peripheral direction thereof, and the outer peripheral wall portion 1c is formed by the spline groove 1d.
The inner peripheral surface of the has a gear shape with continuous irregularities.

The brake bunt 2 is closely arranged along the outer surface of the outer peripheral wall portion 1c of the clutch drum 1, and is reduced in diameter by an actuator (not shown) when a predetermined gear ratio is selected while the vehicle is running. Driven in a direction, the inner peripheral surface of which is slidably contacted with the outer peripheral surface of the outer peripheral wall portion 1c to restrict the rotation of the clutch drum 1. The metal band main body 2a and the inner peripheral surface of the band main body 2a. And a friction resistant friction material 2b fixed to the surface.

By the way, in the clutch device thus constructed, as described above, the brake band 2 is slidably contacted with the outer peripheral wall portion 1c of the clutch drum 1 to regulate the rotation of the drum 1 as required. However, at this time, in order to lubricate and cool the clutch drum 1 and prevent seizure when the brake band 2 is fastened,
Friction material 2 of outer peripheral wall portion 1c of drum 1 and brake band 2
Lubricating oil was supplied to the surface in contact with b.

This lubricating oil supply means has a lubricating oil supply hole 1e formed in the outer peripheral wall 1c of the clutch drum 1 and a supply hole 1e in the band body 2a of the brake band 2.
The discharge hole 2c is formed at a position corresponding to the above, and the groove 2d communicating with the discharge hole 2c is formed in the friction material 2b around the discharge hole 2c. However, the clutch device having such a structure has a technical problem described below particularly in the configuration of the lubricating oil supply means.

[0007]

That is, in the above-mentioned conventional clutch device, as shown in detail in FIG.
A plurality of grooves 2d of the lubricating oil supply means are formed in a divided state along the circumferential direction of the brake band 2. However, in the groove 2d having such a shape, it is difficult for the lubricating oil supplied from the inside of the clutch drum 1 through the supply hole 1e to rotate in the axial direction of the outer peripheral wall portion 1c as shown by the arrow in FIG. There was a problem.

That is, in the state immediately before the engagement of the clutch drum 1 by the brake band 2, since the centrifugal force acts on the supplied lubricating oil, the lubricating oil discharged from the supply hole 1e remains as it is on the discharge hole 2d side. The amount of the friction material 2b and the outer peripheral wall portion 1c in contact with each other is extremely small, and as a result, the portion indicated by A in FIG. 7 is likely to be burnt. If there is a problem and such a burn occurs in the brake band 2, in the worst case, the brake band 2 cannot be opened due to the burn-in, and the gear shift operation becomes impossible.

The present invention has been made in view of such conventional problems, and an object thereof is to prevent burning of a brake band and avoid an inoperable state of a gear shift operation. The object is to provide a clutch device that can be used.

[0010]

In order to achieve the above object, the present invention provides a clutch drum having a cylindrical outer peripheral wall portion and a clutch drum which is disposed closely along the outer surface of the outer peripheral wall portion of the clutch drum. If necessary, in an automobile clutch device having a brake band that is in sliding contact with the outer peripheral surface of the outer peripheral wall portion, the outer peripheral wall portion of the clutch drum is provided with a lubricating oil supply hole penetrating inside and outside, and the outer peripheral wall portion. A plurality of recessed grooves that communicate with the lubricating oil supply hole and extend along the axial direction of the outer peripheral wall portion are provided on the outer peripheral surface of the.

The concave groove may be tapered along the axial direction of the outer peripheral wall. The concave groove may be formed in a spiral shape along the axial direction of the outer peripheral wall portion.

[0012]

According to the above-structured clutch device, the outer peripheral wall of the clutch drum is provided with a lubricating oil supply hole penetrating the inside and the outside thereof, and the outer peripheral surface of the outer peripheral wall is communicated with the lubricating oil supply hole.
Since a plurality of recessed grooves extending along the axial direction of the outer peripheral wall portion are provided, the lubricating oil discharged from the lubricating oil supply port can be guided along the recessed groove in the axial direction of the outer peripheral wall portion of the clutch drum. You can

Further, according to the second aspect of the invention, since the concave groove is provided with a taper along the axial direction of the outer peripheral wall, for example, die cutting can be easily performed when press molding the clutch drum. Become.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. 1 to 4 show an embodiment of a vehicle clutch device according to the present invention.
The clutch device shown in the same figure is disposed in the vicinity of the clutch drum 10 and the outer periphery of the clutch drum 10 as in the case of the conventional device of this type.
And a brake band 12 fastened to the outer peripheral surface of the.

The clutch drum 10 is, for example, a disk-shaped metal material formed by press working into a substantially hollow cylindrical shape, and is concentrically arranged on the inner and outer peripheral edges of the ring-shaped main body 10a. The outer peripheral wall portions 10b and 10c are formed upright, and the length of the outer peripheral wall portion 10c is equal to the inner peripheral wall portion 10b.
Is greater than the length of. On the inner peripheral surface of the outer peripheral wall portion 10c, a plurality of spline grooves 10d are formed in the axial direction at predetermined intervals along the peripheral direction, and the inner peripheral surface of the outer peripheral wall portion 10c is formed by the spline groove 10d. It has a gear shape with continuous irregularities.

The outer peripheral wall portion 10c is provided with a lubricating oil supply hole 10e penetrating inside and outside thereof. Supply hole 10e
In this embodiment, a plurality of them are provided in two steps at predetermined intervals in the circumferential direction and the axial direction. A concave groove 10f communicating with the lubricating oil supply hole 10e is provided on the outer surface of the outer peripheral wall 10c. This concave groove 1
0f means, for example, when press molding the drum 10.
It is formed at the same time as the drum 10 is press-molded, and its details are shown in FIGS. 2 to 4.

First, as shown in FIG. 2, a plurality of recessed grooves 10e are provided along the axial direction of the outer peripheral wall portion 10c so as to be substantially parallel to the axis, along the entire length of the outer peripheral wall portion 10. There is. Further, the concave groove 10e is provided with a taper of an angle θ that is inclined downward from one end of the outer peripheral wall portion 10c toward the main body 10a side. That is, the groove depth of the concave groove 10f is set to be a <b at both ends of the outer peripheral wall portion 10c, as shown in FIG.

Further, as shown in FIG. 4, the recessed groove 10f has a bottom width having a length substantially the same as the diameter of the lubricating oil supply hole 10e, and is formed so that its cross section is concave.
Its width is set to be smaller than that of the spline groove 10d. The size of the concave groove 10f is set so that a groove having a predetermined depth remains even when the outer peripheral wall portion 10c of the clutch drum 10 is finished.

On the other hand, the brake bunt 12 is arranged closely along the outer surface of the outer peripheral wall portion 10c of the clutch drum 10, and is driven by an actuator (not shown) in a direction to tighten the outer peripheral wall portion 10c, if necessary. The inner peripheral surface of the clutch drum 1 is slidably contacted with the outer peripheral surface of the outer peripheral wall portion 10c.
The rotation of the band body 0 is restricted, and it is composed of a metal band body 12a and a wear resistant friction material 12b fixed to the inner peripheral surface of the band body 12a. Unlike the above-mentioned conventional example, the brake band 12 is not provided with a discharge hole and a groove.

In the vehicle clutch device constructed as described above, the brake band 12 is fastened to the outer peripheral wall portion 10c of the clutch drum 10 when a predetermined gear ratio is selected in the automatic transmission. When the drum 1
Lubricating oil is supplied from the inside of 0 through the supply hole 12e. At this time, the device of the present embodiment has the following effects.

That is, when the brake band 12 is fastened, the band 12 approaches the outer peripheral wall portion 10c, and immediately before the fastening, the outer peripheral wall portion 10c of the rotating clutch drum 10 is rubbed with the friction material 12b of the band 12. It is in a state of sliding while touching. When the lubricating oil is discharged from the supply hole 12e in such a state, the lubricating oil jumps outward in the radial direction of the drum 10 due to the centrifugal force of the drum 10.
It will collide with the friction material 12b of the band 12.

At this time, in the apparatus of this embodiment, the supply hole 10e is formed in the outer peripheral surface of the outer peripheral wall portion 10c of the clutch drum 10.
Since a plurality of concave grooves 10f communicating with the outer peripheral wall portion 10c and extending along the axial direction of the outer peripheral wall portion 10c are provided, the lubricating oil supply hole 10e is provided.
Lubricating oil discharged from the outer peripheral wall portion 10 of the clutch drum 10 along the concave groove 10f
The lubricating oil that can be guided in the axial direction of c is further diffused in the circumferential direction by the rotation of the drum 10, and as a result, the friction material 12b and the outer surface of the outer peripheral wall portion 10c can be separated. Will be supplied over the entire circumference of the sliding contact portion.

Therefore, the seizure immediately before the fastening of the brake band 12 is effectively prevented, and it is possible to prevent the automatic transmission from becoming unshiftable. Further, in the clutch device according to the present embodiment, since it is not necessary to provide the brake band 12 with holes or grooves, the structure is simplified. Furthermore, since the recessed groove 10f is provided with a taper along the axial direction of the outer peripheral wall portion 10c, it becomes easy to perform die cutting when the drum 10 is press-molded.

In the above embodiment, the case where the concave groove 10f is formed by press working is illustrated, but the groove 10f is formed.
Can also be formed by cutting. Also, the concave groove 10
It is not necessary for f to be formed over the entire length of the outer peripheral wall portion 10c of the clutch drum 10, as long as it is larger than the width of the band 12, and it is not always necessary to provide a taper. Further, the concave groove 10f does not need to be provided in parallel with the axis of the outer peripheral wall portion 10c, and may be, for example, one that obliquely intersects with the axis or one that is formed in a spiral shape.
The recessed groove 10f only needs to have a portion that extends along the axial direction of the outer peripheral wall 10c.

Further, in the above embodiment, the brake band 12 is not provided with the discharge hole or groove, but the present invention is not limited to this, and the band 12 is provided with the hole or groove. It may be one. Further, in the above embodiment, the clutch drum 10 is constituted by one member, but the embodiment of the present invention is not limited to this. For example, the clutch drum 10 is constituted by the inner and outer drums. The present invention can also be applied to a structure in which a spline groove is provided only on the inner drum and these are integrally formed by welding.

[0026]

As described above in detail in the embodiments,
According to the wet multi-plate clutch device for an automobile of the present invention, seizure of the brake band is prevented, so that inoperability of the automatic transmission can be avoided in advance.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts showing an embodiment of a clutch device according to the present invention.

FIG. 2 is a perspective view of a clutch drum of the clutch device of FIG.

FIG. 3 is an enlarged sectional view of a main part of the clutch drum of FIG.

FIG. 4 is a sectional view taken along line BB of FIG.

FIG. 5 is a cross-sectional view showing an example of a conventional clutch device.

FIG. 6 is a perspective view of an inner surface side of the brake band shown in FIG.

FIG. 7 is an enlarged cross-sectional view of a main part of FIG.

[Explanation of symbols]

 10 Clutch Chidrum 10a Main Body 10b Inner Wall 10c Outer Wall 10d Spline Groove 10e Supply Hole 10f Recessed Groove 12 Brake Band 12a Band Body 12b Friction Material

Claims (3)

[Claims] 1. A clutch drum having a cylindrical outer peripheral wall portion, and a clutch drum, which are arranged close to each other along an outer surface of the outer peripheral wall portion of the clutch drum, and slidably contact the outer peripheral surface of the outer peripheral wall portion as necessary. In an automobile clutch device having a brake band, a lubricating oil supply hole penetrating inside and outside is provided in an outer peripheral wall portion of the clutch drum, and an outer peripheral surface of the outer peripheral wall portion communicates with the lubricating oil supply hole, A vehicle clutch device, comprising a plurality of concave grooves extending along the axial direction of the wall portion. 2. The recessed groove is tapered along the axial direction of the outer peripheral wall.
The vehicle clutch device described. 3. The vehicle clutch device according to claim 1, wherein the concave groove is formed in a spiral shape along an axial direction of the outer peripheral wall portion.