Title:
LOAD HOLDING MECHANISM FOR LIFT MECHANISM
Document Type and Number:
WIPO Patent Application WO/2013/035506
Kind Code:
A1
Abstract:
A load holding mechanism for a lift mechanism which vertically moves a nut member (9) engaged through threads with a screw shaft (4) comprises: a cylinder member (25) which is rotationally driven by power from a motor (1); an outer ring (24) disposed so as to be concentric with the cylinder member; a one-way clutch mechanism (23) which is provided between the cylinder member and the outer ring and which permits relative rotation between the cylinder member and the outer ring in one direction and prohibits the relative rotation in the other direction; and an electromagnetic brake (15) which holds the outer ring by a frictional force. The configuration reduces stress occurring when the lift mechanism suddenly stops during lowering operation.
Inventors:
KAI TAKAMASA (JP)
HAYASE ISAO (JP)
YAMADA HIROYUKI (JP)
TAKADA RYUJI (JP)
FUJISHIMA KAZUO (JP)
HAYASE ISAO (JP)
YAMADA HIROYUKI (JP)
TAKADA RYUJI (JP)
FUJISHIMA KAZUO (JP)
Application Number:
PCT/JP2012/070752
Publication Date:
March 14, 2013
Filing Date:
August 15, 2012
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY (JP)
KAI TAKAMASA (JP)
HAYASE ISAO (JP)
YAMADA HIROYUKI (JP)
TAKADA RYUJI (JP)
FUJISHIMA KAZUO (JP)
KAI TAKAMASA (JP)
HAYASE ISAO (JP)
YAMADA HIROYUKI (JP)
TAKADA RYUJI (JP)
FUJISHIMA KAZUO (JP)
International Classes:
B66F17/00; B66F3/08; F16D41/08; F16D65/14; F16D65/16; F16D67/02
Foreign References:
| JPH047300A | 1992-01-10 | |||
| JPH0645708Y2 | 1994-11-24 | |||
| JP2010112409A | 2010-05-20 |
Attorney, Agent or Firm:
KASUGA Yuzuru (JP)
Kasuga 讓 (JP)
Kasuga 讓 (JP)
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Claims: