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Anti-rotation structure of piston for lock-up clutch

A technology for locking clutches and pistons, applied in transmissions, belts/chains/gears, fluid transmissions, etc., can solve problems such as difficulty in interference, limitation of shaft shortening, and difficulty in further shortening shafts.

Active Publication Date: 2019-05-21
JATCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the technique of Patent Document 1, since the shaft portion must secure a space for installing both the spline and the seal member, the shortening of the shaft portion is limited.
[0009] Therefore, in the technology of Patent Document 1, further shortening of the shaft portion becomes difficult, and as a result, the cover of the torque converter is avoided inwardly at the shaft peripheral portion of the torque converter to avoid contact with the coupling bolt. Intervention can become difficult

Method used

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  • Anti-rotation structure of piston for lock-up clutch
  • Anti-rotation structure of piston for lock-up clutch
  • Anti-rotation structure of piston for lock-up clutch

Examples

Experimental program
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Embodiment Construction

[0032] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0033] figure 1 It is a sectional view showing the main part of the torque converter TC. in addition, figure 1 It is a figure for explaining the schematic structure of the lock-up clutch 5. Regarding the specific structure of the lock-up clutch 5, use figure 2 , image 3 Described later.

[0034] The torque converter TC includes: a cover 1 , a pump impeller 2 , a turbine 3 , a stator 4 , and a lockup clutch 5 . Hereinafter, the lock is referred to as L / U.

[0035] The cover 1 is connected to an unillustrated engine. The cover 1 has a front cover 11 and constitutes a frame portion of the torque converter TC. Inside the front cover 11 is fixed a cylindrical shaft portion 12 which is a shaft portion on which a piston 54 described later is provided. The cylindrical shaft portion 12 penetrates the central portion of the piston 54 and rotates together with the cap 1...

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Abstract

The present invention provides a lock-up clutch piston rotation stop structure that can hardly interfere with a torque converter cover when connected to a drive source, and is also advantageous in terms of cost. The anti-rotation structure (S) includes a piston (54) and a BU plate (56). The piston (54) has comb teeth (54a) at a position outside the cylindrical shaft portion (12) where the piston (54) is provided in the radial direction of the torque converter (TC). The BU plate (56) has an engaging portion (56a) that engages with the comb teeth (54a), and is provided so as to rotate together with the cover (1).

Description

technical field [0001] The present invention relates to a structure for preventing rotation of a piston for a lock-up clutch. Background technique [0002] For example, Patent Document 1 discloses a torque converter including a lock-up clutch. In Patent Document 1, the piston is spline-engaged with the shaft of the torque converter that rotates together with the cover of the torque converter, that is, the shaft of the lock-up clutch where the piston is provided. [0003] patent documents [0004] Patent Document 1: Japanese Patent Laid-Open No. 2001-116110 [0005] In the torque converter, the coupling position of the coupling bolt and the engine varies depending on the applicable engine. As a result, the shaft peripheral portion of the torque converter may need to correspond to the connection between the engine and the torque converter, and in this case, the cover of the torque converter interferes with the coupling bolts. [0006] In this case, it is costly to correspo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H45/02F16H41/04F16H41/24
CPCF16H41/04F16H41/24F16H45/02F16H2045/0289F16H2045/0284
Inventor 豊田优石川靖浩尾崎光治矢部裕一远藤雅亚
Owner JATCO LTD