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Actuator

A technology of actuators and rolling bearings, applied in transmission, medical science, surgery, etc., to achieve the effect of increasing sports comfort, cost-effectiveness, and small axial clearance

Pending Publication Date: 2018-06-29
EWELLIX AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Actuators without gas springs are also known, where there is a certain axial play in the actuator

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] figure 1 An actuator is shown comprising a first nut 10 and a second nut 12 . The threaded spindle ( / lead screw) (threaded spindle) 14 is screwed into (screwed into) the (two) nuts in a play-free manner. (two) nuts are arranged in the housing (housing) 32 . The actuator also comprises a first rolling bearing 16 and a second rolling bearing 18 . Both rolling bearings are (both) designed as deep groove ball bearings. The first rolling bearing 16 is arranged axially between the seat 32 and a part of the nut 10, in particular such that the seat 32 exerts a force on the outer ring of the rolling bearing 16 and a part of the nut exerts a force on the inner ring of the rolling bearing 16, whereby A preload of the bearing 16 is achieved while the nut 10 is pressed against the threaded shaft 14 in an axial direction away from the rolling bearing 16 . In addition, the rolling bearing 18 is arranged between the seat 32 and a part of the nut 12 in a similar manner, so that the ...

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Abstract

Provided is an actuator, which includes a first nut and at least a second nut (10, 12), and a threaded spindle (14) screwed into the first nut and the second nut. The first nut exerts a first force onthe threaded spindle, and the second nut exerts a second force on the threaded spindle, the first direction being different than the second direction.

Description

technical field [0001] The present invention relates to the field of actuators. Background technique [0002] An actuator is known which comprises a threaded spindle and a gas spring. The gas spring is coupled with the threaded shaft along the longitudinal direction of the threaded shaft. Actuators without gas springs are also known, where there is a certain axial play within the actuator. [0003] Furthermore, operating tables are known which are moved using hydraulic cylinders which are largely free of play. Contents of the invention [0004] The object of the present invention is, inter alia, to provide an actuator of the above-mentioned type which allows a comfortable movement thereof when installed in an operating table or a treatment chair. This object is creatively achieved by the features of technical solution 1 of the present application as well as by the features of technical solution 6 of the present application, while advantageous designs and further develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H25/24
CPCF16H25/24F16H25/2454F16H2025/209A61G13/04F16H25/2006F16H25/2266Y10T74/19902F16H2025/2012F16H2025/228
Inventor 曼努埃尔·多普勒约翰内斯·费德勒克里斯蒂安·舒尔特海斯马塞尔·索尔特曼
Owner EWELLIX AB
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