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Actuator

A technology of actuators and motors, applied in transmissions, belts/chains/gears, mechanical equipment, etc.

Active Publication Date: 2014-06-11
LINAK AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, the problem is to lower the patient as smoothly as possible, and for the quick release it is to react as quickly as possible to save life

Method used

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  • Actuator
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] Such as figure 1 The patient lift shown comprises a frame 1 provided with wheels. A tie rod 2 pivotable about a transverse axis is fixed at one end to the frame. The hook 3 for lifting the patient is fixed to the other end of the pull rod. The tie rod is raised and lowered by a linear actuator 4, one end of which is fixed to the frame and the other end of the linear actuator is fixed to the tie rod. A control box 5 containing the control unit and rechargeable batteries is used to operate the actuators and is mounted on the frame.

[0040] from figure 2 As can be seen in , the main part of the actuator is formed by a housing 6 with a reversible electric motor 7 driving a spindle 9 with a spindle nut 10 through a transmission, here a worm and helical gear , a transmission rod 11 (inner tube) is fixed to said spindle nut, which is telescopically mounted in a tubular part (outer tube) 12 of the housing. The housing has a rear seat 13 for securing the rear end of the a...

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PUM

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Abstract

The present invention discloses an actuator of the type where a driving rod (11) is extended by a nut (10) on a driven spindle. A manually operated emergency lowering device (14) for the driving rod (11) is mounted between the driving rod (11) and a mounting bracket (16) at the end thereof . The emergency lowering device (14) comprises a first cylindrical part (15) connected with the mounting bracket (16) and a second cylindrical part (17) connected with the driving rod (11) . The two cylindrical parts are coupled together by a screw spring (21) . The spring is released by an operating grip (19) constructed as a bushing in which the one end (22) of the spring (21) is secured. The other end (23) of the spring (21) is secured in the cylindrical part (17) connected with the driving rod (11) . Rotation of the bushing causes the spring (21) to be released, whereby the driving rod (11) may be screwed back by the manually applied torque.

Description

technical field [0001] The invention relates to an actuator comprising a reversible electric motor which rotates a mandrel about its longitudinal axis through transmission means. Background technique [0002] Simply put, a linear actuator consists of a spindle driven by a reversible electric motor through a transmission. A nut is arranged on the mandrel, and the transmission rod is fixed on the mandrel nut. The spindle nut is fixed against rotation and moves outward or inward on the spindle depending on the direction of rotation of the motor, and the drive rod extends or retracts with the nut. [0003] Depending on the structure in which the actuator is included, the actuator may have a quick release function or an emergency lowering function. The quick release feature is commonly used in actuators for hospital or nursing beds to be able to lower eg the backrest immediately if a patient has a heart attack or falls into a coma. The emergency lowering function is commonly u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H25/24
Inventor A·B·洛伦岑
Owner LINAK AS