JPH06109097A - Drive plate assembly body for automatic transmission - Google Patents

Abstract

PURPOSE:To provide a drive plate assembly body which is hardly broken by the operation. CONSTITUTION:A drive plate assembly body 1 installed between the crankshaft of an engine and a torque converter 4 is equipped with a drive plate 2 and a spring plate 3, and the inner peripheral part of the drive plate 2 is installed on the crankshaft, and one edge part of the spring plate 3 is fixed on the outer peripheral part of the drive plate 2, and the other edge part is installed on the torque converter 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The drive plate assembly of the present invention can be mainly used for an automatic transmission such as a vehicle.

[0002]

2. Description of the Related Art As a drive plate assembly for an automatic transmission, the one disclosed in Japanese Patent Application No. 1-9266 is known as a prior art. As shown in FIG. 3, the prior art described above includes a torque converter unit 1 of an automatic transmission for a vehicle.
00 is described. Here, the lockup device 101
The drive plate 103 is fixed to the outer peripheral portion of the front cover 102 disposed adjacent to the drive plate 103 by a plurality of bolts (not shown).
At its inner peripheral portion, it is fixed to the crankshaft of the engine (not shown) together with the front plate 105 and the rear plate 106 by a plurality of bolts 104.

In this prior art, when the operating pressure of the lock-up device 101 is generated inside the torque converter unit 100, the front cover 10 receives the reaction force thereof.
2 bends to the left in the figure. Here, as described above, the drive plate 103 is fixed to the crankshaft at the inner peripheral portion thereof, and is attached to the front cover 102 at the outer peripheral portion thereof,
Due to the bending of the front cover 102 as described above, stress is generated in the drive plate 103 at an intermediate portion between the inner peripheral portion and the outer peripheral portion thereof. Further, since the mounting surface 102a of the front cover 102 to the drive plate 103 cannot maintain a right angle to the rotation axis C of the torque converter unit 100,
Repeated stress due to rotation is further applied to the drive plate 103. Due to the repeated generation of this stress, in the worst case, the drive plate 103 breaks at the portion A in the figure. In order to eliminate this problem,
If the drive plate 103 is made strong and the rigidity is increased, the bending of the front cover 102 as described above,
Alternatively, the case 107 and the extension sleeve 108 are inclined relative to each other due to an error in the squareness of the mounting surface 102a of the front cover 102 with respect to the rotation axis C, and the bush installed between the case 107 and the extension sleeve 108. There is a problem that 109 is worn or damaged.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a drive plate assembly which is not easily damaged by its operation.

[0005]

In order to solve the above problems, the present invention provides a drive plate assembly installed between a crankshaft of an engine and a torque converter, the drive plate assembly including a drive plate and a spring plate. An inner peripheral portion of the plate is attached to the crankshaft, one end portion of the spring plate is fixed to the outer peripheral portion of the drive plate, and the other end portion is attached to the torque converter. The drive plate assembly was used.

[0006]

According to the above-mentioned structure, the spring plate attached to the drive plate can absorb a part of the bending of the front cover or the error in the squareness of the mounting surface of the front cover with respect to the rotation axis. It is possible to reduce the stress generated in the plate and prevent damage to the drive plate.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a drive plate assembly according to the present invention, and FIG. 2 is a front view. In FIG. 1, the drive plate assembly 1 is roughly divided into a drive plate 2,
The spring plate 3 is used. The drive plate 2 is composed of a disk portion 2a made of a steel plate and a ring 2b made of steel material, and, like the prior art shown in FIG. 3, a crankshaft of an engine and a front cover 4 of a torque converter of an automatic transmission, which are not shown. It is arranged between the two and transmits the driving force of the engine to the transmission side. The ring 2b
Is a gear having teeth 2c on its outer circumference, and transmits the rotational force of the starter motor to the drive plate assembly 1 via the teeth 2c when the engine is started. The disc portion 2a and the ring 2b have the ring 2b on the outer peripheral portion of the disc portion 2a.
After fitting the inner peripheral part of the above, it is usually fixed by welding at equal positions on the circumference.

A feature of the present invention is that six spring plates 3 are provided on the outer peripheral portion of the drive plate 2 at equal positions on the circumference in the present embodiment. One end of the spring plate 3 is fixed to the drive plate 2 by welding or caulking with a pin 5 (in FIG. 1, both fixing methods are described at the same time for convenience). At the other end, the mounting hole 3a of the spring plate 3 is provided.
It is attached to the boss 4a of the front cover 4 by a mounting bolt 6 inserted through. The spring plate 3 is made of a spring material and has a crank shape in cross section in FIG. 1, so that the bending of the front cover 4 and the like are well absorbed.

When the drive plate assembly 1 in which the drive plate 2 and the spring plate 3 are integrated is mounted on a vehicle or the like,
Via the front and rear plates (not shown),
It is fixed to the crankshaft of the engine by a plurality of bolts (not shown) inserted through the mounting holes 2d of the drive plate 2, and then fixed to the boss 4a of the front cover 4 by the spring plate 3. At this time, the hole 2e provided in the drive plate 2 is used for inserting the mounting bolt 6 for the work.

In the above embodiment, six spring plates are provided on the circumference, but the present invention is not limited to this.
Further, the shape of the spring plate can be variously modified within the technical scope of the present invention.

[0012]

In the drive plate assembly according to the present invention, since the spring plate is provided between the drive plate and the front cover, the bending of the front cover and the like can be well absorbed, so that the drive plate can be prevented from being damaged and the reliability can be improved. ,
The drive plate assembly for an automatic transmission with high safety can be provided.

Further, the only component that is disabled to prevent the drive plate from being damaged is the spring plate, and it is possible to maintain a low-cost and lightweight drive plate assembly.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a drive plate assembly according to the present invention.

FIG. 2 is a front view of a drive plate assembly according to the present invention.

FIG. 3 is a sectional view of an automatic transmission according to the related art.

[Explanation of symbols]

1 Drive plate assembly 2 Drive plate 3 Spring plate 4 Front cover

Claims (2)

[Claims] 1. A drive plate assembly installed between an engine crankshaft and a torque converter, comprising a drive plate and a spring plate, the drive plate having an inner peripheral portion attached to the crankshaft, and the spring plate. Is a drive plate assembly for an automatic transmission, wherein one end is fixed to an outer peripheral portion of the drive plate and the other end is attached to the torque converter. 2. The drive plate assembly for an automatic transmission according to claim 1, wherein the spring plate has a crank shape in cross section.