Title:
ELECTRIC LINEAR ACTUATOR
Document Type and Number:
WIPO Patent Application WO/2013/069801
Kind Code:
A1
Abstract:
[Object] Provided is an electric linear actuator with which operation lock of a ball screw is prevented and high rotational performance is achieved at a low cost. [Solution] A housing (2) comprises a first housing (2a), and a second housing (2b). An electric motor is attached to the first housing (2a). An accommodation hole is formed at the first and second housings (2a, 2b) to accommodate a screw shaft. A deceleration mechanism (6) comprises an input gear (3) which is fixed to a motor shaft, an intermediate gear (4) which is engaged with the input shaft (3), and an output gear (5) which is engaged with the intermediate gear (4), and fixed to a nut (18) as a single unit. The intermediate gear (4) is rotatably supported via a shell-type needle bearing (23) using gear shafts (22) respectively implanted at the first housing (2a) and the second housing (2b). Ring-shaped washers (27, 28) are mounted on both sides of the intermediate gear (4). A width of a gear section of the intermediate gear (4) is configured to be smaller than a face width.
Inventors:
IKEDA YOSHINORI (JP)
Application Number:
PCT/JP2012/079311
Publication Date:
May 16, 2013
Filing Date:
November 12, 2012
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16H25/22; F16C19/46; F16C33/12; F16C33/20; F16H25/20; F16H55/17
Foreign References:
| JP2008006868A | 2008-01-17 | |||
| JP2008312433A | 2008-12-25 | |||
| JP2007046637A | 2007-02-22 |
Other References:
See also references of EP 2778475A4
None
None
Attorney, Agent or Firm:
KOSHIKAWA, TAKAO (JP)
Takao Koshikawa (JP)
Takao Koshikawa (JP)
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Claims: