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Title:
CYLINDER MEMBER FOR AUTOMATIC TRANSMISSION AND METHOD OF MANUFACTURING THE SAME
Document Type and Number:
Japanese Patent JP2013194905
Kind Code:
A
Abstract:

To provide a cylinder member for an automatic transmission capable of reducing the number of manhours in manufacturing and reducing the size of a press device and achieving high diameter accuracy and a cylinder member manufacturing method that can easily obtain the cylinder member.

A cylinder member 1 for an automatic transmission is formed by press working and includes a bottom part 2, an inner peripheral wall part 3 and an outer peripheral wall part 4. The inner peripheral wall part 3 includes an inner peripheral side stationary part 31 and an inner peripheral side introduction part 32, and the outer peripheral wall part 4 includes an outer peripheral side stationary part 41 and an outer peripheral side introduction part 42. The outer peripheral side stationary part 41 includes a through hole 411 communicating the inner peripheral side with the outer peripheral side. The outer peripheral side introduction part 42 includes a positioning claw part 421 formed by protruding a tip of the outer peripheral side introduction part 42 toward the outer peripheral side. The outer peripheral side introduction part 42 includes: a diameter expanding straight part 422 having a larger constant inner diameter dimension than an inner diameter dimension of the outer peripheral side stationary part 41; and a diameter change part 423 smoothly connecting the diameter expanding straight part 422 to the outer peripheral side stationary part 41.


Inventors:
MAKI MASAYUKI
KAWASHIMA TAKAAKI
Application Number:
JP2012066481A
Publication Date:
September 30, 2013
Filing Date:
March 23, 2012
Export Citation:
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Assignee:
AISIN AW CO
International Classes:
F16H57/10; B21D19/08; B21D22/28; B21D28/28; B21D53/88; F16D55/40; F16D65/14; F16D65/18
Domestic Patent References:
JPH0284058U1990-06-29
JPH11141661A1999-05-25
JP2012002263A2012-01-05
JPH09210064A1997-08-12
Attorney, Agent or Firm:
Patent Business Corporation Aichi International Patent Office