JPH0538248Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention provides a clutch plate in which a date plate is arranged at the end or in the middle of the clutch plate, which is composed of a drive plate and a driven plate, to relieve the clutch tightening shock. The present invention relates to a mounting structure for the date plate.

BACKGROUND TECHNOLOGY In general, automatic transmissions for vehicles, as disclosed in Japanese Utility Model Application No. 60-79040, each component gear of a plurality of sets of planetary gear units is engaged and released as a friction element, such as a clutch or a brake, as appropriate. By combining them, various gears can be obtained.

By the way, in the clutch, as shown in FIG. 7, for example, a ring-shaped clutch plate 4 such as a drive plate 2, a driven plate 3, etc. is arranged on the inner peripheral surface of a clutch drum 1. A large number of claws 2a are formed on the inner circumference of the drive plate 2, and a large number of claws 3a are formed on the outer circumference of the driven plate 3.
The pawl portion 2a of the driven plate 3 is fitted and locked in an axially movable spline groove on the outer periphery of a connecting drum (not shown) which is arranged concentrically inside the clutch drum 1, and the pawl portion 3a of the driven plate 3
It is fitted and locked in a plurality of spline grooves 1a provided along the axial direction of the inner circumferential surface so as to be movable in the axial direction.

A piston 5 is provided at one end of the clutch plate 4, and a retaining plate 6 and a snap ring 7 are provided at the other end of the clutch plate 4. When the piston 5 moves to the right by supplying hydraulic pressure into the working chamber 5a, the drive plate 2 and the driven plate 3 are pressed together between the piston 5 and the retaining plate 6, and the clutch is fastened. It will be done. By tightening the clutch in this manner, torque is transmitted between the clutch drum 1 and the connecting drum.

When the clutch drum 1 is engaged, the piston 5
If the clutch plate 4 is suddenly compressed, the engagement shock at this time may cause a shift shock in the automatic transmission. There is. This date plate 8
has a tapered ring shape, and in the example shown in FIG. The spring force of the plate 8 can absorb the tightening shock of the clutch.

However, in such a conventional date plate mounting structure, the date plate 8
has a tapered ring shape, so that when the date plate 8 is pinched between the clutch plate and the retaining plate 6 and deformed into a flat shape when the clutch is fastened, the date plate 8 is deformed into a flat shape.
Since the outer circumferential corners of the clutch drum 1 rub against the inner circumferential surface of the clutch drum 1 while being in line contact, the inner circumferential surface of the clutch drum 1 that is in contact with the dish plate 8 is abraded and wears out. There is a risk that powder may enter the control valve of an automatic transmission, and there is a problem that the entry of such wear powder may cause the valve to become stuck, leading to defective gear shifting. Ta.

Therefore, the present invention solves the problems of the conventional date plate mounting structure and brings the date plate into surface contact with the clutch drum, thereby preventing wear of the contact portion. The present invention provides a mounting structure for a date plate that can be used.

Means for Solving the Problems In order to achieve this objective, a plurality of grooves are provided along the axial direction of the inner circumferential surface of the clutch drum. The claws formed on the inner periphery of either of the clutch plates are movably fitted and locked, and the claws formed on the inner periphery of the other of the clutch plates are engaged with the outer periphery of the connecting drum, which is arranged concentrically inside the clutch drum. A date plate is fitted and locked in the spline groove so as to be movable in the axial direction, and a date plate is interposed between the clutch plate and a retaining plate disposed at the axial end of the clutch plate to relieve the clutch engagement shock. In the clutch, a plurality of grooves for fitting the delivery plate are provided along the axial direction between the plurality of grooves provided along the inner peripheral surface of the clutch drum, and an outer peripheral edge A flat surface is formed in which the portion is in parallel contact with the clutch plate in a natural state, and a claw portion is formed in which the radial side end surface is in surface contact with the inner bottom surface of the dish plate fitting groove,
The clutch is configured to attach the clutch to the dish plate by fitting and locking the pawl into the dish plate fitting groove.

Function According to this mounting structure of the date plate, when the claw part of the date plate is fitted into the axial groove provided on the inner peripheral surface of the clutch drum,
The outer peripheral edge of the claw portion of the delivery plate is parallel to the clutch plate in a natural state, and the radial side end surface of the claw portion is parallel to the inner bottom surface of the spline groove for the delivery plate along the axial direction. Because
This radial side end face and the inner bottom face of the spline groove are fitted and locked while maintaining surface contact.

Even if the delivery plate is sandwiched between the clutch plate and the retaining plate and deformed while moving along the axial direction as the clutch is engaged or released, the claws of the delivery plate may There is no change in the parallel state between the outer peripheral edge and the clutch plate, and therefore the state of surface contact between the radial end face of the claw part of the dateshield plate and the inner face of the spline groove is maintained as it is, and the dateshape when the clutch is engaged is maintained. The surface pressure between the inner periphery of the plate and the clutch drum is reduced, and there is no rubbing between the two, thereby preventing wear on the inner periphery of the dish plate and clutch drum.

Embodiments Hereinafter, various embodiments of the clutch date plate mounting structure according to the present invention will be described with reference to the drawings.

1 and 2 show the structure of a clutch 10 to which a first embodiment of the present invention is applied.
is a clutch drum, and the clutch drum 12
A clutch plate 18 in which a plurality of drive plates 14 and driven plates 16 are alternately arranged is provided on the inner periphery of the clutch plate 18 . A pawl portion 20 is formed on the outer periphery of the driven plate 16. and are fitted together so as to be movable in the axial direction.

On the other hand, the inner periphery of the drive plate 14 has a claw portion 2.
4 is formed, and this claw portion 24 is fitted into a spline groove formed on the outer periphery of a connecting drum (not shown) in the clutch drum 12 so as to be movable in the axial direction.

A retaining plate 26 is disposed near the driven plate 16 disposed on the rightmost side of the clutch plate 18 in FIG. 28 is formed, and this claw portion 28 fits into the spline groove 22 on the inner circumference of the clutch drum 12.
axially movably fitted therein. Numeral 30 is a snap ring for preventing the retaining plate 26 from coming off, and the snap ring 30 is locked to the inner periphery of the clutch drum 12.

A piston 32 is slidably and sealingly fitted into the left closed end of the clutch drum 12, and the tip of the piston 32 (the right end in FIG. 1) is the left end of the clutch plate 18, that is, the most It is in contact with the driven plate 16 located on the left. An operating chamber 34 is formed between the piston 32 and the clutch drum 12 to receive hydraulic pressure supplied from a hydraulic pressure source (not shown).

Reference numeral 40 denotes a tapered ring-shaped delivery plate, and this delivery plate 40 is disposed between the right end of the clutch plate 18 and the retaining plate 26. This date plate 4
0, the clutch plate 18 and retaining plate 26 are biased in the direction away from each other.

Here, in this embodiment, as shown in FIG.
and spline grooves 22 into which the claws 20 of the driven plate 16 are fitted are formed alternately. The portion 20 is fitted and locked.

As shown in an enlarged view in FIG. 3, the outer peripheral edge 40b of the dish plate 40, where the claw portion 42 is formed, has a flat surface 40c that is in parallel contact with the driven plate 16 constituting the clutch plate in its natural state.
is formed, and a radial side end surface 42a of the dish plate 40 is formed.
It is fitted so as to be movable in the axial direction while maintaining surface contact with the inner bottom surface 44a of the fitting spline groove 44 of No.0.

That is, in this embodiment, a plurality of driven plates 1 are provided along the inner peripheral surface of the clutch drum 12.
A plurality of spline grooves 44 for the dish plate 40 are newly provided along the axial direction between the spline grooves 22 for the dish plate 40, and the claws 42 of the dish plate 40 are fitted and locked into the spline grooves 44. It has become a characteristic.

The taper direction of the date plate 40 is as follows:
The outer periphery is set closer to the clutch plate 18 side, and the inner periphery is set closer to the retaining plate 26 side, and the outer periphery where the claw portion 42 is formed is not tapered and remains in its natural state. This is a flat surface extending parallel to the clutch plate 18.

According to the first embodiment, by supplying hydraulic pressure from a hydraulic pressure source (not shown) into the working chamber 34, the piston 32 presses the clutch plate 18 toward the retaining plate 26, thereby causing the drive The plate 14 and the driven plate 16 are pressed against each other to engage the clutch. During such an operation, the outer peripheral edge of the claw portion 42 of the dish plate 40 is a flat surface running parallel to the clutch plate 18 in its natural state, and the radial side of the claw portion 42 is a flat surface in a natural state. Since the end surface 42a is parallel to the inner bottom surface 44a of the spline groove 44 for the dish plate along the axial direction, when the claw part 42 is fitted and locked in the spline groove 44, the claw part 42
The radial side end surface 42a of the spline groove 44 for the dish plate is fitted and locked to the inner bottom surface 44a of the spline groove 44 while maintaining surface contact therewith.

When the delivery plate 40 is sandwiched between the clutch plate 18 and the retaining plate 26 and deformed as the clutch is engaged or released, even if the claw portion 4 of the delivery plate 40
There is no change in the parallel state between the outer peripheral edge of the clutch plate 18 and the outer peripheral edge of the clutch plate 18, and therefore, the surface contact state between the radial side end surface 42a of the pawl portion 42 and the inner bottom surface 44a of the spline groove 44 is maintained as it is, thereby preventing each other. The contact surface pressure is reduced, and wear during operation can be reduced. In particular, it is possible to prevent the generation of large particles of abrasion powder that may interfere with the operation of a control valve (not shown).

In the first embodiment, the claw portion 20 formed on the outer periphery of the driven plate 16 is fitted into the spline groove 22 formed on the inner periphery of the clutch drum 12. A similar claw portion may be formed on the outer periphery of the drive plate 14 and this claw portion may be fitted into the spline groove 22. In other words, the claws formed on the outer periphery of either the drive plate 14 or the driven plate 16 are fitted into the axial grooves provided on the inner periphery of the clutch drum 12, and the claws formed on the outer periphery of either the drive plate 14 or the driven plate 16 are Each outer peripheral claw portion 28, 4 of the retaining plate 26 and the date plate 40, which are receiving members arranged at the axial end.
This embodiment is applied to a clutch in which the clutches 2 and 2 are fitted together so as to be movable in the axial direction.

4 and 5 show a second embodiment of the present invention, in which the same components as in the previous embodiment are denoted by the same reference numerals.

In this second embodiment, the delivery plate 40 is sloped linearly from the inner circumferential portion to the tip of the claw portion 42, and in its natural state, the claw portion 42 is on the retaining plate 26 side, and the inner circumferential portion is on the clutch plate 18 side. When the clutch is released as shown in FIG.
It has entered slightly into 6a. When the clutch is engaged as shown in FIG.
When the clutch plate 40 is pressed between the driven plate 16 and the retaining plate 26, the delivery plate 40 is deformed in a direction parallel to the clutch plate 18.

Therefore, according to the second embodiment, since the dish plate 40 is provided with a linear taper, the dish plate 40 is characterized by good workability.

FIG. 6 shows a third embodiment of the present invention, in which the claw portion 42 of the date plate 40 is
The radial width W ₁ of the claw portion 2 of the driven plate 16
The claw portion 42 of the date plate 40 is formed to be smaller than the radial width _W2 of the date plate 40.
The radial widths of the spline grooves 44 and 22 into which the claw portions 20 of the driven plate 16 are fitted are also made different from each other.

In this third embodiment, the radial width W ₁ of the claw portion 42
Since the radial width W ₂ of the claw portion 20 and the radial width W 2 of the claw portion 20 are different from each other and correspond to the radial width of the spline grooves 44 and 22, mistakes in assembling the date plate 40 and the driven plate 16 are prevented. Effect can be obtained.

Effects of the Invention As explained above, according to the date plate mounting structure of the clutch according to the present invention, when the claw part of the date plate is fitted into the axial groove provided on the inner peripheral surface of the clutch drum, , the outer peripheral edge of the claw portion of the dish plate is parallel to the clutch plate in a natural state, and the radial side end surface of the claw portion is parallel to the inner bottom surface of the spline groove for the dish plate along the axial direction. Therefore, if the radial side end face and the inner bottom face of the spline groove are fitted and locked while maintaining surface contact, and the dish plate is deformed into a flat shape as the clutch is engaged or released. However, there is no change in the parallel state between the outer peripheral edge of the claw portion of the dateshield plate and the clutch plate, and therefore the state of surface contact between the radial side end surface of the claw portion of the dateshield plate and the inner surface of the spline groove is maintained as it is. , it is possible to reduce the surface pressure between the inner periphery of the delivery plate and the clutch drum when the clutch is engaged.

Therefore, the wear of the contact area between the clutch drum and the delivery plate is significantly reduced, and the generation of wear particles is almost eliminated, which has the excellent effect that the operation of control valves etc. is not affected by wear particles. is brought about.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing the main parts of a first embodiment of the clutch delivery plate mounting structure according to the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is the above-mentioned An enlarged sectional view of the main parts of the first embodiment,
4 and 5 are side sectional views of main parts showing a second embodiment of the present invention, FIG. 6 is a sectional view showing a third embodiment of the present invention and corresponds to the above-mentioned FIG. 2, and FIG. 7 1 is a side cross-sectional view of a main part showing an example of a conventional mounting structure of a dish plate. 10...Clutch, 12...Clutch drum,
14... Drive plate, 16... Driven plate, 18... Clutch plate, 22... Spline groove (groove portion), 26... Retaining plate,
30...Snat spring, 32...Piston, 3
4... Working chamber, 40... Dateshi plate, 4
0b...Outer peripheral edge, 40c...Flat surface, 42...
Claw portion, 42a...Radial side end face, 44...Spline groove (for date plate), 44a...Inner bottom surface, 20, 24, 28, 42...Claw portion.

Claims (1)

[Claim for Utility Model Registration] A claw portion formed on the outer periphery of one of the clutch plates, such as a drive plate and a driven plate, in a plurality of grooves provided along the axial direction of the inner peripheral surface of the clutch drum. is movably fitted and locked, and the claw portion formed on the inner periphery of the other clutch plate can be moved in the axial direction into a spline groove on the outer periphery of the connecting drum, which is arranged concentrically inside the clutch drum. In the clutch, in which a date plate is interposed between the clutch plate and a retaining plate disposed at an axial end of the clutch plate, the date plate is fitted and locked to the clutch plate, and the date plate is interposed between the clutch plate and a retaining plate disposed at an axial end of the clutch plate. A plurality of grooves for fitting the delivery plate are provided along the axial direction between the plurality of grooves provided along the circumferential surface. In this state, flat surfaces are formed in parallel contact with each other, and the radial side end surfaces form claw portions that make surface contact with the inner bottom surface of the groove for fitting the date plate,
A structure for mounting a date plate for a clutch, characterized in that the pawl portion is fitted and locked in the groove portion for fitting the date plate.