Electric linear driver having shock-absorption protection and controllable stroke

Abstract

The invention discloses an electric linear driver having shock-absorption protection and a controllable stroke. The electric linear driver comprises a motor, a slide sleeve pipe, a pull rope displacement sensor, a motor controller electrically, and a connecting plate connected with a pull rope of the pull rope displacement sensor; and a rubber buffer pad is disposed between the slide sleeve pipe and an end face of a thread bushing. According to the electric linear driver having the shock-absorption protection and the controllable stroke, a telescopic displacement of the slide sleeve pipe of an electric cylinder is detected through the disposed pull rope displacement sensor, so the stroke of the electric cylinder is accurate and controllable, and then the electric cylinder can be conveniently used to drive an object the displacement quantity of which needs to be accurately controlled; and the rubber buffer pad is disposed between the slide sleeve pipe and the end face of a thread bushing, so, in motor starting, stop, reversing and other working processes, the rubber buffer pad can buffer an axial impact force on a screw thread pair of a screw mechanism, damage of the axial impact force on the screw thread pair can be prevented then, and the failure rate of the electric cylinder is reduced.

Description

technical field [0001] The invention relates to a driving device, in particular to an electric cylinder. Background technique [0002] The electric cylinder is a driving device that uses a motor to drive a screw mechanism (such as a sliding screw, a ball screw) to convert rotary motion into linear motion. The structure of the electric cylinder includes a motor, a reducer, a screw mechanism, a sliding sleeve and a supporting structure for supporting the sliding sleeve. [0003] The existing support structure includes a support tube connected to the reducer housing, a guide seat fixed on the front end of the support tube and slidingly matched with the sliding sleeve, and a screw rod for fixing the guide seat. The support structure has many components, complex structure, large volume and high manufacturing cost. [0004] Moreover, the existing electric cylinder does not have a device for detecting and controlling its stroke. When the electric cylinder needs to be used to driv...

AI Technical Summary

Problems solved by technology

[0006] In view of this, the object of the present invention is to provide an electric linear drive with shock-absorbing protection and controllable stroke to solve the technical problem that the electric cylinder in the prior art cannot precisely control its stroke; The cylinder does not have the function of shock absorption and buffering. During the working process of the motor starting, stopping, and reversing, the screw drive pair is subject to a large impact force and is easily damaged.

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