Operating mechanism and crank arm thereof

Abstract

The invention provides an operating mechanism and a crank arm thereof, and the crank arm comprises: a crank arm disc which is provided with a through hole in rotation stopping fit with a driving shaftin the operating mechanism; a crank arm plate, wherein a hole or an opening for avoiding a shaft sleeve in the driving shaft or the crank arm disc is formed in the crank arm plate, one of the crank arm disc and the crank arm plate is provided with a plurality of connecting holes arranged around the axial direction of the driving shaft, and the other one of the crank arm disc and the crank arm plate is provided with at least one adaptive hole corresponding to any one of the connecting holes, so that the connecting piece penetrates through the connecting holes and the adaptive holes to fix thecrank arm disc and the crank arm plate. The connecting position of the crank arm disc and the crank arm plate is changed to adapt to driving shafts and driven pieces with different arrangement relations, holes or openings are formed in the connecting lever plate, the positions of the crank arm plate are limited by the driving shafts or the crank arm disc, and the crank arm disc and the crank arm plate can be fixed only by enabling one connecting piece to penetrate through one set of connecting holes and one set of adapting holes, so that the processing amount of the adapting holes in the crankarm plate or the crank arm disc is reduced. Compared with the prior art, the machining amount is reduced, and the structure is simpler.

Description

technical field [0001] The invention relates to an operating mechanism and its crank arm. Background technique [0002] In the prior art, when the crank arm in the operating mechanism is assembled, it can rotate around the main shaft and change its relative position with the main shaft to adapt to the relative position of the main shaft and different followers, which is convenient for assembly and can improve the crank arm versatility. For example, the authorized announcement number is CN209183413U, and the patent document whose authorized announcement date is 2019.07.30 discloses an operating crank arm. The crank arm includes a crank arm plate and a crank arm plate. The anti-rotation structure is sleeved on the rotating shaft and rotates with the rotating shaft during use; at least two mounting positions for mounting the rotating arm plate are arranged on the rotating arm along its axial direction, and the rotating arm plate can be moved through the mounting position of th...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a crank arm, which can solve the problem of complicated structure in the prior art of the high versatility of the crank arm; another purpose of the present invention is to provide an operating mechanism using the crank arm, which has a structure simple advantage

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