JPH08210460A - Mounting structure for drive plate - Google Patents

Abstract

PURPOSE: To markedly reduce, stress generated in a drive plate when thermally displaced a tor-con cover, relating to a mounting structure of the drive plate for connecting the drive plate rotated by a crankshaft of an engine to the tor- con cover of a fluid type automatic transmission. CONSTITUTION: In a mounting structure for a drive plate formed by inserting a bolt 49 to a plurality of mounting holes 31a formed in the periphery of a drive plate 31 to screw a point end of the bolt to a boss part 43 fixed to the periphery of a tor-con cover 41, the mounting structure is constituted by inserting a guide member 47 of guiding the drive plate inserted with the bolt in its axial length direction into the mounting hole of the drive plate and by arranging an energizing member 51 of energizing the drive plate to a boss part side between the drive plate and a head part of the bolt.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive plate mounting structure for connecting a drive plate rotated by a crankshaft of an engine to a torque converter cover of a hydraulic automatic transmission.

[0002]

2. Description of the Related Art Generally, in a vehicle, a drive plate is used for transmitting the rotation of a crankshaft of an engine to a torque converter cover of a hydraulic automatic transmission. FIG. 3 shows a conventional structure for mounting a drive plate on a torque converter cover. A crankshaft 17 is attached to the center of the drive plate 11 via a pilot converter 13 by a bolt 15.
Are connected.

A plurality of mounting holes 11a are formed on the outer periphery of the drive plate 11, and as shown in FIG.
The drive plate 11 is connected to the torque converter cover 23 by inserting the bolt 19 into the la 1a and screwing the tip of the bolt 19 into the boss portion 25 fixed to the outer periphery of the torque converter cover 23 of the hydraulic automatic transmission 21. There is.

[0004]

However, in such a conventional drive plate mounting structure, in general,
Due to heat generation of the working fluid of the fluid automatic transmission 21, the torque converter cover 23 is thermally displaced toward the drive plate 11 side by, for example, about 1 mm, so that the drive plate 11 is pressed and deformed by the boss portion 25, and the drive plate is deformed. There is a problem in that a large amount of stress acts on the drive plate 11, and the repetition of this may cause the drive plate 11 to be fatigued.

The present invention has been made to solve such a conventional problem, and provides a drive plate mounting structure capable of significantly reducing the stress generated in the drive plate during thermal displacement of the torque converter cover, as compared with the conventional structure. The purpose is to provide.

[0006]

According to a first aspect of the present invention, there is provided a drive plate mounting structure, wherein a bolt is inserted into a plurality of mounting holes formed in an outer periphery of a drive plate whose central portion is connected to a crankshaft. In the mounting structure of the drive plate, the tip is screwed to a boss portion fixed to the outer periphery of the torque converter cover of the fluid automatic transmission, and the drive plate mounting structure is formed by connecting the drive plate to the torque converter cover. A guide member that inserts the bolt and guides the drive plate in the axial direction of the bolt is inserted, and urges the drive plate toward the boss side between the drive plate and the head of the bolt. The members are arranged.

According to a second aspect of the present invention, in the drive plate mounting structure according to the first aspect, the urging member is a disc spring.

[0008]

In the drive plate mounting structure according to claim 1,
When the torque converter cover is thermally displaced to the drive plate side, the drive plate is pressed by the boss portion, and the drive plate is moved to the head side of the bolt along the guide member against the biasing force of the biasing member. It

In the drive plate mounting structure according to the second aspect, since the disc spring having a relatively large elastic force is used as the biasing member, the drive plate is firmly attached to the torque converter cover.

[0010]

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

FIG. 1 shows details of essential parts of FIG. 2, and FIG. 2 shows an embodiment of a drive plate mounting structure of the present invention. In this embodiment, the drive plate 31
A crankshaft 37 is connected to a central portion of the through a pilot converter 33 by a bolt 35. A plurality of mounting holes 31a are formed on the outer periphery of the drive plate 31 at a predetermined angle.

On the other hand, a boss portion 43 is fixed to the outer periphery of the torque converter cover 41 of the hydraulic automatic transmission 39 by welding 45 at a position corresponding to the mounting hole 31a of the drive plate 31. As shown in FIG. 1, one end of a guide member 47 for guiding the drive plate 31 in the axial direction is inserted into the mounting hole 31a of the drive plate 31.

A through hole 47a is formed in the guide member 47, and a bolt 49 is inserted into the through hole 47a. The tip of the bolt 49 is screwed into the boss portion 43 of the torque converter cover 41. A flange portion 47b is formed at the other end of the guide member 47, and the head portion 49a of the bolt 49 is in contact with the flange portion 47b.

The drive plate 31 is in contact with the boss portion 43. A disc spring 51, which is a biasing member that biases the drive plate 31 toward the boss 43, is arranged on the outer periphery of the guide member 47 on the side of the flange 47b. Then, the washer 53 is provided between the disc spring 51 and the drive plate 31.
Is arranged.

In the drive plate mounting structure described above, when the crankshaft 37 of the engine rotates, the drive plate 31 rotates, and the rotation of the drive plate 31 is transmitted to the torque converter cover 41 via the bolt 49 and the torque converter cover 41. Is rotated. In the drive plate mounting structure configured as described above, heat generated by the working fluid of the fluid automatic transmission 39 causes the torque converter cover 41 to move to the drive plate 31.
When the drive plate 31 is thermally displaced toward the side, the drive plate 31 is pressed by the boss portion 43, and the drive plate 31 resists the biasing force of the disc spring 51 and moves toward the head 49a side of the bolt 49 along the guide member 47. Be moved.

Therefore, when the torque converter cover 41 is thermally displaced, the stress generated in the drive plate 31 can be greatly reduced as compared with the conventional case, and the risk of fatigue failure of the drive plate 31 can be effectively eliminated. Further, in the drive plate mounting structure described above, since the disc spring 51 having a relatively large elastic force is used as the biasing member, the drive plate 31 can be easily firmly attached to the torque converter cover 41. The rotation of the drive plate 31 can be reliably transmitted to the torque converter cover 41.

Further, in the above-described drive plate mounting structure, since the washer 53 is arranged between the disc spring 51 and the drive plate 31, the biasing force of the disc spring 51 is dispersed by the washer 53 and acts on the drive plate 31. It is possible to reduce the concentrated load. In addition, in the above-described embodiment, an example in which the disc spring 51 is used as the urging member has been described, but the present invention is not limited to this embodiment, and for example, an elastic member such as hard rubber is used. May be.

[0018]

As described above, in the drive plate mounting structure according to claim 1, when the torque converter cover is thermally displaced toward the drive plate side, the drive plate is pressed by the boss portion, and the drive plate is biased by the biasing member. Since the bolt is moved to the head side of the bolt along the guide member against the urging force of No. 2, the stress generated in the drive plate during thermal displacement of the torque converter cover can be significantly reduced as compared with the conventional case.

In the drive plate mounting structure according to the second aspect, since the disc spring having a relatively large elastic force is used as the biasing member, the drive plate can be easily firmly attached to the torque converter cover. There is an advantage that the rotation of the drive plate can be reliably transmitted to the torque converter cover.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a main part of a drive plate mounting structure of FIG.

FIG. 2 is a cross-sectional view showing an embodiment of a drive plate mounting structure of the present invention.

FIG. 3 is a cross-sectional view showing a conventional drive plate mounting structure.

FIG. 4 is a cross-sectional view showing the main parts of the drive plate mounting structure of FIG.

[Explanation of symbols]

 31 Drive Plate 31a Mounting Hole 37 Crank Shaft 39 Fluid Type Automatic Transmission 41 Torque Converter Cover 43 Boss 47 Guide Member 49 Bolt 49a Head 51 Disc Spring

Claims (2)

[Claims] 1. A bolt is inserted into each of a plurality of mounting holes formed in the outer periphery of a drive plate whose central portion is connected to a crankshaft, and the tip of the bolt is fixed to the outer periphery of a torque converter cover of a hydraulic automatic transmission. A drive plate mounting structure in which the drive plate is connected to the torque converter cover by being screwed into a boss portion, and the bolt is inserted into the mounting hole of the drive plate, and the drive plate is attached in the axial direction of the bolt. A guide member that guides the drive plate to the boss, and a biasing member that biases the drive plate toward the boss is disposed between the drive plate and the head of the bolt. Construction. 2. The drive plate mounting structure according to claim 1, wherein the urging member is a disc spring.