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power transmission

A technology of power transmission device and automatic transmission, which is applied to multi-gear ratio transmission devices, transmission elements, hydraulic brakes, etc., can solve the problem of reducing the strength of the holding plate, and achieve the effect of ensuring the strength and uniform surface pressure

Active Publication Date: 2020-09-25
JATCO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Therefore, if no research is done on the shape of the retaining plate, etc., the strength of the retaining plate will decrease

Method used

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Examples

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Embodiment Construction

[0062] Hereinafter, a case where the power transmission device of the present invention is a transmission mechanism unit of an automatic transmission for a vehicle will be described as an example.

[0063] figure 1 It is a schematic diagram of the periphery of the transmission mechanism unit 3 of the automatic transmission 1 .

[0064] figure 2 It is a figure explaining the connection table of the automatic transmission 1.

[0065] The automatic transmission 1 for a vehicle according to the present embodiment is mounted on a vehicle including a drive source. As a driving source, there are an engine and / or an electric motor, and the like.

[0066] like figure 1 As shown, in the transmission mechanism unit 3 of the automatic transmission 1, four planetary gear mechanisms (planetary gear mechanisms) are arranged between the input shaft 30A and the output shaft 30B.

[0067] In this embodiment, the four planetary gear mechanisms are a first planetary gear mechanism 31 , a se...

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Abstract

A power transmission device suppresses the expansion of the axial length of a frictional engagement element, and provides a protrusion on a holding plate. The speed change mechanism part (3) has: a piston (8), an outer peripheral side plate (7), an inner peripheral side plate (6), and a friction coupling element (clutch K81) arranged in sequence along the rotation axis X direction (4, 5A). , brake B05, clutch K27, brake B06); the frictional coupling elements of piston (8), outer peripheral side plate (7), inner peripheral side plate (6), and retaining plate (4, 5) are arranged in sequence along the rotation axis X direction (brake B08, clutch K38). The piston (8) side surface (50a) of the holding plate (5A) is flat. On the surface (50a) of the holding plate (5) on the piston (8) side, a protrusion (55) having a circular cross-section protruding toward the piston side is provided. The radius of curvature (r) of the root portion (511) of the holding plate (5) is larger than the radius of curvature (r1) of the root portion (511) of the holding plate (5A).

Description

technical field [0001] The present invention relates to power transmission devices. Background technique [0002] A multi-plate type frictional engagement element (multi-plate type frictional engagement element) in which a plurality of clutch discs are alternately arranged is known. [0003] The inventors of the present invention have found that in the multi-plate type frictional engagement element, there is a tendency that the unevenness of the surface pressure distribution becomes larger in the direction away from the clutch piston. [0004] The reason why the unevenness of the surface pressure distribution becomes large is due to the inclination of the holding plate. [0005] Therefore, the present inventors found that by providing protruding curved protrusions, such as protrusions with a circular cross section, on the surface side of the clutch piston side of the retaining plate, even if the retaining plate is inclined, the surface pressure distribution can be made unif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D25/08F16D13/68F16D55/40
CPCF16D13/683F16D25/082F16D55/40F16D65/095F16H2200/0065F16D13/752F16D25/0638F16D2013/642
Inventor 平野智昭古市润荒井敏孝
Owner JATCO LTD