Reciprocating linear motion mechanism

Abstract

The invention relates to a reciprocating linear motion mechanism. A closed externally-toothed guide rail consists of two toothed racks and two semi-circular externally-toothed rings and is fixed on a work bench with a linear guide rail. A driving gear is fixedly connected with a driving shaft. A wheel axle support frame is connected with the driving shaft, a guide wheel and an intermediate gear shaft. Two intermediate gears are fixedly connected with two ends of the intermediate gear shaft and engages with the external teeth of the driving gear and the closed externally-toothed guide rail respectively. The guide wheel is matched with the internal rail of the closed externally-toothed guide rail. The driving mechanism supplies power to the driving gear via the driving shaft and then to the intermediate gear II via the intermediate gear I and the intermediate gear shaft and acts on the closed externally-toothed guide rail. Under the limitation of the guide wheel, the intermediate gear II makes cyclic motion along the closed externally-toothed guide rail, thereby driving the work bench to make reciprocating linear motion. The mechanism is characterized in large travel range, uniform velocity, smooth turning and no need of limit switch; and is suitable for mechanical equipment in need of uniform-velocity and large-travel reciprocating linear motion.

Description

Reciprocating linear motion mechanism technical field The invention relates to a reciprocating linear motion mechanism, in particular to a reciprocating linear motion mechanism with large stroke range, uniform speed and smooth reversing. Background technique Existing driving modes for realizing reciprocating linear motion generally include the following modes: fluid transmission mode, including hydraulic transmission and pneumatic transmission mechanisms; crank slider mechanism; screw nut mechanism; rack and pinion mechanism. These mechanisms have their own advantages and disadvantages. Among them, the fluid transmission mechanism has the advantage of easy reversing, but it needs to install various power components, actuators, control components, auxiliary components and working media, etc., and the components require high manufacturing accuracy; The mechanism also has the advantage of easy reversing, but there are defects such as limited stroke and uneven speed; although...

AI Technical Summary

Problems solved by technology

These mechanisms have their own advantages and disadvantages. Among them, the fluid transmission mechanism has the advantage of easy reversing, but it needs to install various power components, actuators, control components, auxiliary components and working media, etc., and the components require high manufacturing accuracy; The mechanism also has the advantage of easy reversing, but there are defects such as limited stroke and uneven speed; although the screw-nut mechanism and the rack-and-pinion mechanism run at a uniform speed and have a large stroke, it is necessary to install a reversing device and set a limit switch

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