A Novel Self-Actuated Linear Drive for Long-Range-of-Motion Electromechanical Systems

被引:1
作者
Dooley, Mason [1 ]
Shen, Xiangrong [1 ]
机构
[1] Univ Alabama, Dept Mech Engn, Tuscaloosa, AL 35487 USA
关键词
linear actuator; belt drive; electromechanical system;
D O I
10.3390/act11090250
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Obtaining powered linear movement over a long range of motion is a common yet challenging task, as the majority of linear actuators have limited ranges of motion as determined by their functioning mechanisms. In this paper, the authors present a novel belt-based self-actuated linear drive (B-SALD), in which a self-powered moving platform slides on a slotted track with essentially unlimited range of motion (only limited by the length of the track). Unlike the traditional rack-and-pinion mechanism, the B-SALD system uses a double-sided timing belt as the power-transmitting element. With the teeth on its inner surface, the belt interacts with a timing pulley for its own circulation; with the teeth on its outer surface, the belt interacts with a linear rail with parallel slots and drives the translation of the moving platform. The unique functioning mechanism generates multiple distinct advantages: no lubrication is required; the slotted track is simple and inexpensive to manufacture; and it provides an inherent compliance to buffer shock loading. With the experiments conducted on a preliminary prototype, it has been demonstrated that the B-SALD is able to provide accurate positioning and continuous motion control, an overall mechanical efficiency of 70% over the majority of the load range, and the capability of generating large force output in the desired manner.
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页数:11
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