Novel linear driving device

A linear drive, a special technology, applied in medical science, prosthesis, etc., can solve the problems of unsatisfactory driving effect, large overall size of the drive, large frictional resistance, etc., and achieve easy control, solve the problem of axial rotation and stable output Effect

Inactive Publication Date: 2013-04-03
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the linear actuators are usually in the form of ordinary rotary motors plus screw nuts. This type of actuator has a large overall size, complex structure, large frictional resistance, and the driving effect is not very ideal.

Method used

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Experimental program
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Embodiment Construction

[0015] Preferred embodiments of the present invention are described as follows in conjunction with the accompanying drawings:

[0016] see figure 1 , figure 2 and image 3 , the linear drive device includes a special stepping motor (1), an inner push rod (2), a cylindrical guide bush (3), an outer sleeve (4), a flanged guide bush (5), and connecting ears (6) , the motor box (7), the rear cover of the motor box (8) and the connecting ear socket (9). The biggest feature of the special stepping motor (1) is that the motor and the screw nut are integrated to make the structure of the driving device more compact; the motor is fixed in the motor box (7), and the inner wall of the motor box is processed with positioning holes. Make the driving device have good coaxiality; the inner push rod (2) adopts a hollow structure, passes through the screw rod and is fixed on the screw nut, and the outer cylindrical surface of the inner push rod (2) is milled with two parallel Flat sur...

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PUM

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Abstract

The invention relates to a novel linear driving device, which mainly comprises a special stepper motor, an internal push rod, an external sleeve, a motor box, a motor rear cover plate, a connecting lug and a guide sleeve, wherein the rotary movement of the motor is changed into the straight movement of the push rod through a screw nut, thereby adjusting the length of the driving device and realizing the rotation of mechanical leg joints. The integral structure of the driving device becomes compact by adopting the special stepper motor; on one hand, the guide sleeve performs good guiding and supporting functions and limits the axial rotation of the push rod on the other hand. When a system is assembled, a plurality of positioning holes are provided for positioning, so that the system has high axiality. The novel linear driving device has a compact structure, good axiality, large travel, small resistance, small transmission errors, and easiness in control.

Description

technical field [0001] The invention relates to a linear driving device, in particular to a linear driving device applied to an exoskeleton mechanical leg. Background technique [0002] In modern social production and life, with the rapid growth of means of transportation and the deepening of the aging population, more and more people are injured by nerves or limbs. Nursing care for the elderly and the disabled will become a social priority. Therefore, it is particularly important to design and develop exoskeleton mechanical legs suitable for the elderly, which are used to help the elderly or disabled to walk, complete tasks such as strides, and up and down steps to meet their daily needs. [0003] At present, most of the mechanical legs mainly adopt a linear drive device in the form of a rotary drive or a common rotary motor plus a screw nut. Due to the high speed of the motor, the rotary drive system needs to be equipped with a reducer. If the reduction is large, the size...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/70
Inventor 章亚男任昭霖沈林勇钟翠华
Owner SHANGHAI UNIV
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