Title:
LINEAR ACTUATOR
Document Type and Number:
WIPO Patent Application WO/2016/015730
Kind Code:
A3
Abstract:
Linear actuator comprising an electric motor (6), which through a transmission (12) drives a spindle unit comprising at least one spindle (10) with a spindle nut (13). A tubular adjustment element (3) in connection with the spindle unit is displaced either outwards or inwards depending on the direction of rotation of the spindle unit. A brake in the shape of a coil spring (21) is arranged in connection with a cylindrical element (15) for retaining the tubular adjustment element (3) in a given position when the power for the electric motor (6) is cut off. The cylindrical element (15) is designed as a separate cylindrical element arranged on the spindle (10) or a shaft in the transmission (12). The separate cylindrical element (15) is preferably arranged on a rear end of the spindle (10) between the rear mounting (4) and the bearing (11) for the spindle (10). Compared to the known constructions, where the spring is positioned on a cylindrical element on the side of a worm wheel, the heat generation is limited, just as the heat is led out to the rear mounting.
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Inventors:
SØRENSEN RENE (DK)
Application Number:
PCT/DK2015/000030
Publication Date:
March 31, 2016
Filing Date:
July 29, 2015
Export Citation:
Assignee:
LINAK AS (DK)
International Classes:
F16H25/24; F16H25/20
Domestic Patent References:
| WO1995010716A1 | 1995-04-20 |
Foreign References:
| DE29522239U1 | 2000-12-14 | |||
| US20130169088A1 | 2013-07-04 | |||
| DE102005007205B3 | 2006-08-17 | |||
| US20120227522A1 | 2012-09-13 | |||
| DE102012110505A1 | 2014-05-08 | |||
| US20100122594A1 | 2010-05-20 | |||
| US20110079486A1 | 2011-04-07 | |||
| US4287969A | 1981-09-08 |
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