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Title:
SWASH PLATE SERVO DEVICE FOR SWASH PLATE PLUNGER TYPE HYDRAULIC UNIT
Document Type and Number:
Japanese Patent JP3962348
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To effectively utilize an end part of a male screw formed on a screw shaft in a ball screw mechanism for controlling swing of a swash plate.
SOLUTION: A hydraulic motor M is constituted by a motor cylinder 32 having a motor plunger hole 32a, a motor plunger 33 fitted and arranged in the plunger hole, and a motor swing member 35 capable of changing and adjusting a swash plate angle by inclining and swinging. A motor servo mechanism SV for inclining and swinging the motor swing member 35 (motor swash plate 31) has the screw shaft 61 on which the male screw 61a is formed and a ball female screw 62a screw-fitting in the male screw. It is provided with a ball nut 62 linked to an arm part 35a of the motor swing member and a swash plate control motor 67 rotating and driving the screw shaft. A stopper 70 attached to an end part of the screw shaft is integrally formed by a ring part 71 positioned adjacent to an end part of a male screw part and a flange part 72 on which a side face of the ball nut is abutted.


Inventors:
伊藤 克彦
荒井 大
Application Number:
JP2003000096811
Publication Date:
August 22, 2007
Filing Date:
March 31, 2003
Export Citation:
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Assignee:
本田技研工業株式会社
International Classes:
F04B1/22; F16H39/14; F16D31/02; F16H25/22; (IPC1-7): F16H39/14; F04B1/22
Domestic Patent References:
JP2001141024A
JP63152960U
JP57085649U
JP10309060A
Attorney, Agent or Firm:
大西 正悟