JP2000314462A - Vehicle drive plate - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reduce deformation of a vibration-damping piece mounting surface of a web portion as much as possible, to prevent the function of the vibration-damping piece from deteriorating, and near the vibration-damping piece mounting surface Provided is a vehicle drive plate capable of preventing cracks in the vehicle. SOLUTION: It is formed of a disk-shaped web portion 10 formed from a metal plate, and a ring-shaped rim portion 20 formed by bending an outer peripheral end of the web portion 10 to one side. A ring gear 30 meshing with the starter gear is provided on the outer peripheral portion of the rim portion 20, and a torque converter mounting portion 11 is formed at a circumferential interval from an intermediate portion of the web portion 10 toward the outer peripheral portion. A crankshaft mounting portion 12 is formed near the center at intervals in the circumferential direction. A vibration damping piece 40 is mounted between the ring gear 30 and the torque converter mounting portion 11 in the vicinity of the ring gear 30. The vibration damping piece mounting surface 41 of the vibration damping piece 40 and the torque converter mounting portion 11 And a step portion 14 is formed between them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive plate for a vehicle, which connects a crankshaft of a vehicle engine to a torque converter mounted on an automatic transmission, and transmits torque of the engine to the torque converter. In particular, the present invention relates to a vehicle drive plate provided with a ring gear formed of a metal plate and having an outer peripheral portion for temporarily connecting to a starter gear.

[0002]

2. Description of the Related Art Recently, many vehicles have a structure in which rotation of a crankshaft is transmitted to an axle via a torque converter. The rotation of the crankshaft is controlled by a vehicle drive plate attached to the axle. The power is transmitted to the converter.

FIG. 4 shows an example of this type of vehicle drive plate.
Is a disk-shaped web portion 2 formed by plastic working from a thin metal plate, and a ring-shaped rim formed by bending an outer peripheral end of the web portion 2 toward the front F side in an L shape. Part 3
The ring gear 4 is fixed to the outer peripheral surface of the rim portion 3 by welding.

In the web portion 2, a plurality of crankshaft mounting holes 2a for concentrically mounting the web portion 2 at the center portion to a flange portion 5a formed at the end of the crankshaft 5 are equally arranged on a concentric circle. And a web portion 2 located near the rim portion 3 outside the crankshaft mounting hole 2a.
A plurality of torque converter mounting holes 2b for mounting the torque converter 6 on the torque converter 6 are formed concentrically.

Further, one or a plurality of vibration damping pieces 7 are spot-welded to the web portion 2 near the ring gear 4 between the inner peripheral surface of the rim portion 3 and the torque converter mounting hole 2b. It is attached on a circumference centered on the center of the web part 2.

[0006] The vibration damping piece 7 functions to suppress unbalance vibration of the drive plate 1 during engine rotation.

The drive plate 1 for a vehicle is fixed to the flange portion 5a of the crankshaft 5 by mounting bolts 5b inserted into the mounting holes 2a for the crankshaft via the reinforcement plate 8, and has a torque. It is fixed to the boss 6a on the torque converter 6 side by a mounting bolt 6b inserted into the converter mounting hole 2b.

[0008]

In the above-described vehicle drive plate 1, the ring gear 4 has a cantilever shape with the center of the web portion 2 as a fulcrum. Due to the centrifugal force acting on the web portion 2a, the web portion 2 is deformed as shown in FIG.
In particular, the damping piece mounting surface 2d is deformed into a curved shape.

For this reason, a part of the vibration damping piece 7 may peel off from the vibration damping piece mounting surface 2d of the web portion 2, and the function of the vibration damping piece 7 may be deteriorated. In addition, there is a possibility that a crack may occur on the vibration damping piece mounting surface 2d.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. An object of the present invention is to reduce deformation of a web portion on a damping piece mounting surface of a web portion as much as possible to reduce the deformation of the damping piece. It is an object of the present invention to provide a vehicle drive plate capable of preventing a decrease in function and preventing a crack on a vibration damping piece mounting surface.

[0011]

According to a first aspect of the present invention, there is provided a disk-shaped web (10) formed from a metal plate and an outer periphery of the web (10). A ring-shaped rim (20) formed by bending an end to one side; a ring gear (30) meshing with a starter gear is provided on an outer peripheral portion of the rim (20); A torque converter mounting portion (11) is formed at a circumferential distance from an intermediate portion of the portion (10) toward an outer peripheral portion, and further, is circumferentially spaced near a center portion of the web portion (10). A vehicle drive plate (E) having a crankshaft mounting portion (12) formed therein, being located between the ring gear (30) and the torque converter mounting portion (11) and being controlled near the ring gear (30). Take the shake piece (40) In those digits, it is characterized by forming the step portion (14) between said torque converter mounting portion damping piece mounting surface (41) of the damping piece (40) (11).

According to a second aspect of the present invention, there is provided the front step portion (14).
Is formed near the vibration damping piece mounting surface (41).

[0013] The first aspect of the present invention is configured as described above.
According to the invention according to the first aspect, the web portion (10) between the vibration damping piece mounting surface (41) and the torque converter mounting portion (11).
Can be increased by the step portion (14), so that the deformation of the vibration damping piece mounting surface (41) due to the centrifugal force acting on the web portion (10) during high-speed rotation of the engine can be reduced. . This can prevent the vibration-damping piece (40) from peeling off from the vibration-damping piece mounting surface (41), and prevent the function of the vibration-damping piece (40) from deteriorating. Further, it is possible to prevent a crack in the vibration damping piece mounting surface (41).

According to the second aspect of the invention, the step portion (1
4) is formed near the damping piece mounting surface (41), so that the section modulus of the web portion (10) near the damping piece mounting surface (41) becomes larger, and the damping piece mounting is performed. The deformation near the surface (41) can be further reduced. Thereby, it is possible to further prevent the function of the vibration damping piece (40) from deteriorating.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. However,
Elements common to those of the conventional example shown in FIG. 4 are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 1, E denotes a drive plate for a vehicle, which is formed from a metal plate and has a disc-shaped web portion 10.
And a ring-shaped rim portion 20 formed by bending an outer peripheral end of the web portion 10 toward one side, and a ring gear meshing with an outer peripheral portion of the rim portion 20 with a starter gear (not shown). 30 and a torque converter mounting portion 11 is formed at a circumferential distance from an intermediate portion of the web portion 10 toward the outer peripheral portion, and further a crank is provided at a circumferential distance near the center portion of the web portion 10. The shaft mounting portion 12 is formed.

A vibration damping piece 40 is mounted between the ring gear 30 and the torque converter mounting portion 11 and in the vicinity of the ring gear 30. The vibration damping piece mounting surface 41 of the vibration damping piece 40 and the torque converter A step portion 14 is formed between the mounting portion 11 and the mounting portion 11. This step 14
Is formed close to the damping piece mounting surface 41.

Further, the configuration of the embodiment of the present invention will be described in detail.

The vehicle drive plate E is formed from a thin metal plate by plastic working, and has a disk-shaped web portion 10 and an outer peripheral end of the web portion 10 formed on a front F.
Side, that is, a rim portion 20 formed by bending toward the crankshaft 5 side.

A ring gear 30 is provided around the outer periphery of the rim 20.
Are fixed by welding. The ring gear 3
0 may be formed by rolling and forming the outer peripheral surface of the rim portion 20.

In the web portion 10, a torque converter mounting hole 11 as a torque converter mounting portion is formed near the outer peripheral portion from the intermediate portion, and a crankshaft mounting hole 12 as a crankshaft mounting portion is formed near the center portion. ing.

A plurality of, for example, four, torque converter mounting holes 11 are formed concentrically with the web portion 10 on the same circumference, and the crankshaft mounting holes 12 are concentric with the web portion 10. A plurality of, for example, six pieces are formed on the same circumference. Also, a torque converter mounting hole 1
Four additional holes 15 are formed between the mounting hole 1 and the mounting hole 12 for crankshaft to reduce the weight, improve the sound vibration performance, and improve the flexibility.

The vibration damping piece 40 is formed of a metal plate, and has a ring gear 30 and a torque converter mounting hole 11.
And the web portion 10 near the ring gear 30
One or more are fixed to the side face on the crankshaft 5 side by spot welding concentrically with the web portion 10.

The step portion 14 is formed by drawing the web portion 10.
And is formed in an L-shape extending toward the crankshaft 5 at right angles to the side surfaces of the damping piece mounting surface 41 where the damping piece 40 is mounted and the torque converter mounting hole 11. Are arranged near the vibration damping piece mounting surface 41.

The drive plate E for a vehicle is fixed to the flange portion 5a of the crankshaft 5 by mounting bolts 5b inserted into the mounting holes 12 for each crankshaft via the reinforcement plate 8 as in the conventional example. ,Also,
It is fixed to the boss 6a on the torque converter 6 side by a mounting bolt 6b inserted into each torque converter mounting hole 11. As a result, the vehicle drive plate E
Transmits the rotation of the crankshaft 5 to the torque converter 6 and absorbs the thrust load of the torque converter 6.

According to the vehicle drive plate E configured as described above, the section modulus of the web portion 10 between the damping piece mounting surface 41 and the torque converter mounting hole 11 is determined by the step portion 14 as shown in FIG. Therefore, the deformation of the vibration damping piece mounting surface 41 due to the centrifugal force acting on the web portion 10 when the engine rotates at high speed can be reduced.

That is, as shown by the imaginary line in FIG. 3, the web portion 10 is bent by the centrifugal force, but the vicinity of the damping piece mounting surface 41 is hardly deformed. by this,
Separation of the damping piece 40 from the damping piece mounting surface 41 can be prevented, and deterioration of the function of the damping piece 40 can be prevented. Further, cracks in the vibration damping piece mounting surface 41 can be prevented, and the durability of the vehicle drive plate E can be improved.

Further, by forming the step portion 14 near the damping piece mounting surface 41, the damping piece mounting surface 4 is formed.
The section modulus of the web portion 10 in the vicinity of 1 becomes larger, and the deformation in the vicinity of the vibration damping piece mounting surface 41 can be further reduced. As a result, the function of the vibration damping piece 40 can be further prevented from deteriorating.

[0029]

According to the first aspect of the present invention, the section modulus of the web portion between the vibration damping piece mounting surface and the torque converter mounting portion can be made larger by the step portion.
The deformation of the vibration damping piece mounting surface due to the centrifugal force acting on the web portion when the engine rotates at high speed can be reduced.
Thereby, it is possible to prevent the vibration damping piece from peeling off from the vibration damping piece mounting surface, and to prevent the function of the vibration damping piece from deteriorating. Further, cracks in the vibration damping piece mounting surface can be prevented, and the durability of the vehicle drive plate can be improved.

According to the second aspect of the present invention, since the step portion is formed near the damping piece mounting surface, the section modulus of the web portion near the damping piece mounting surface becomes larger, The deformation can be made smaller than the deformation near the vibration damping piece mounting surface. This can further prevent the function of the vibration damping piece from deteriorating.

[Brief description of the drawings]

FIG. 1 is an explanatory side view of a vehicle drive plate according to an embodiment of the present invention.

FIG. 2 is an explanatory front view of the vehicle drive plate.

FIG. 3 is an explanatory diagram showing a deformed state of a web portion when the engine rotates at a high speed.

FIG. 4 is an explanatory cross-sectional side view of a vehicle drive plate according to a conventional example.

FIG. 5 is an explanatory diagram showing a deformed state of a web portion at the time of high-speed rotation of the engine.

[Explanation of symbols]

Reference Signs List 10 Web part 11 Torque converter mounting part (Mounting hole for torque converter) 12 Crankshaft mounting part (Mounting hole for crankshaft) 14 Step part 20 Rim part 30 Ring gear 40 Damping piece 41 Damping piece mounting surface E Vehicle drive plate

Claims (2)

[Claims] 1. A disk-shaped web formed from a metal plate, and a ring-shaped rim formed by bending an outer peripheral end of the web toward one side. A ring gear meshing with the starter gear is provided on an outer peripheral portion of the web portion, and a torque converter mounting portion is formed at a circumferential interval from an intermediate portion of the web portion toward an outer peripheral portion, and further,
A drive plate for a vehicle, wherein a crankshaft mounting portion is formed in the vicinity of a center portion of the web portion at intervals in a circumferential direction, and is located between the ring gear and a torque converter mounting portion and is controlled in the vicinity of the ring gear. A drive plate for a vehicle, wherein a stepped portion is formed between the vibration-damping piece mounting surface of the vibration-damping piece and the torque converter mounting portion, wherein the vibration-piece is mounted. 2. The drive plate for a vehicle according to claim 1, wherein a position of the front step portion is formed close to the vicinity of the vibration damping piece mounting surface.