Safety type crank arm rotary device

Abstract

The invention relates to the technical field of a crank arm, and discloses a safety type crank arm rotary device. The safety type crank arm rotary device comprises a fixed arm, wherein a mounting plate is fixedly connected to the side wall of the left side of the fixed arm; two mounting holes are symmetrically formed in the side wall of the left side of the mounting plate; a driving motor is fixedly connected to the side wall of the upper side of the fixed arm, and is located at a part, close to the right end, of the fixed arm; a driving shaft is fixedly connected to an output shaft of the driving motor; a fixed hole is formed in the side wall of the upper side of the fixed arm; the driving shaft penetrates through the fixed arm through the fixed hole; a rotating arm is arranged outside the driving shaft in a sleeving manner; an inserting hole is formed in the side wall of the upper side of the rotating arm, and is located at a part, close to the left end, of the rotating arm; and thedriving shaft penetrates through the rotating arm through the inserting hole. The service life of the driving motor and the rotary device are prolonged.

Description

technical field [0001] The invention relates to the technical field of crank arms, in particular to a safe crank arm turning device. Background technique [0002] The curved arm is a mechanical structure that can be turned flexibly. It is very flexible to use and can be applied to more complex environments. It is often used in many lifting equipment to realize the rapid lifting and retracting actions of the lifting equipment. [0003] The existing outer crank arm slewing structure is driven by a motor, and the output shaft of the motor is connected to the crank arm. When the crank arm bears a large load, all the load carried by the crank arm acts on the motor, which will cause the motor to lose weight for a long time. damage, reducing the service life of the motor, and sliding friction often occurs between the two crank arms of the existing slewing device, resulting in faster wear and reducing the service life of the slewing device. Contents of the invention [0004] (1) ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a safe crank arm slewing device, which has the advantages of improving the service life of the motor of the slewing device and reducing the wear speed between the crank arms, etc., and solves the problem of the motor of the slewing device in the prior art. Reduced service life and faster wear between crank arms due to heavy loads

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