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Power transmission device for vehicle

A technology for power transmission devices and vehicles, which is applied to transmission devices, fluid transmission devices, transmission device control, etc., can solve the problems of reduced attenuation performance, difficult spring configuration in damping devices, and increased hysteresis torque, so as to improve the degree of freedom, Realization of miniaturization and weight reduction, effect of reducing hysteresis torque

Inactive Publication Date: 2020-05-05
EXEDY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, in the conventional damper device, if the spring rate is to be lowered, it is necessary to ensure the spring strength corresponding to the repeated stress acting on the spring, so the spring diameter may be increased.
On the other hand, if the spring rate is to be lowered without increasing the spring diameter, the spring length may increase
In this way, in the conventional damper device, since the diameter of the spring is increased, the size of the damper device may be increased.
[0007] In addition, the larger the size of the damper, the more likely the weight of the damper will increase
In addition, the larger the diameter of the spring, the more difficult it is to freely arrange the spring in the damper.
In addition, the larger the size of the damper device, the larger the range in which the spring and peripheral parts slide, so the hysteresis torque is more likely to increase.
For example, in the case of increased hysteresis torque, the damping performance may decrease due to the increase in the equivalent stiffness of the damper

Method used

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  • Power transmission device for vehicle
  • Power transmission device for vehicle
  • Power transmission device for vehicle

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Experimental program
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no. 1 approach

[0034]

[0035] Such as figure 1 As shown, the torque converter 100 has a power transmission device 1 and a torque converter main body 2 . The torque converter main body 2 is connected to an output shaft 15 . A front cover 4 is fixed to the torque converter main body 2 . The structure of the torque converter main body 2 is substantially the same as that of the conventional structure, and thus description thereof will be omitted here.

[0036] Such as figure 1 As shown, the power transmission device 1 has an input rotary member 3 (an example of a first rotary member), an output rotary member 5 (an example of a second rotary member), and at least one torque transmission portion 7 . It should be noted that the power transmission device 1 has a rotation axis X. As shown in FIG. Hereinafter, the direction along the rotation axis X is expressed as an axial direction, and the direction away from the rotation axis X is expressed as a radial direction. In addition, the direction...

no. 2 approach

[0092] The structure of the torque converter 200 of the second embodiment is substantially the same as that of the first embodiment except for the torque transmission portion 107 . In addition, the structure of the torque transmission part 107 of 2nd Embodiment has the same structure partially as the torque transmission part 7 of 1st Embodiment. Therefore, in the second embodiment, the description of the same configuration as that of the first embodiment is omitted. The description omitted here is based on the description of the first embodiment.

[0093] Such as image 3 as well as Figure 4 As shown, the torque transmission part 107 is disposed between the input rotary member 3 and the output rotary member 5 . The torque transmission unit 107 transmits torque from the input rotary member 3 to the output rotary member 5 via hydraulic oil. The torque transmission portion 107 is provided on the input rotary member 3 so as to be rotatable integrally with the input rotary mem...

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PUM

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Abstract

The invention provides a power transmission device for a vehicle, which can easily reduce rigidity. The power transmission device (1) includes an input rotating member (3), an output rotating member (5) and a torque transmission portion (7). The torque transmission portion (7) transmits torque from the input rotating member (3) to the output rotating member (5) through hydraulic oil. The torque transmission portion (7) includes an oil chamber portion (23); first pistons (25), (27) which can press the output rotating member (5); a second piston (28) which cooperatively keeps the hydraulic oil on the oil chamber portion (23); and an elastic portion (30) elastically holding the second piston (28). First pressure-receiving areas (A1, A2) at which the first pistons (25, 27) receive the pressureof the hydraulic oil are smaller than second pressure-receiving areas (A3) at which the second pistons receive the pressure of the hydraulic oil.

Description

technical field [0001] The present invention relates to a power transmission device for a vehicle. Background technique [0002] In a conventional vehicle power transmission device such as a damper device, an input rotary member and an output rotary member are connected by a coil spring (torque transmission portion). In this case, when torque is input to the input rotary member, the coil spring is compressed between the input rotary member and the output rotary member. In addition, when a torque fluctuation is input to the input rotating member, the elastic member expands and contracts between the input rotating member and the output rotating member. [0003] Patent Document 1: Japanese Unexamined Patent Application Publication No. H10-196764 [0004] In general, in a damper device, if the vibration frequency of the torque fluctuation input from the engine to the damper device is close to the natural frequency of the damper device, the damper device may resonate. This res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H45/02F16F15/134
CPCF16F15/134F16H45/02F16H2045/005F16H2045/0221F16F15/10F16H61/10F16H2045/0231
Inventor 安田圭一
Owner EXEDY CORP