Composite speed reducer

Abstract

The invention discloses a composite speed reducer. The speed reducer comprises a case, a case cover, a worm, worm gear and an output shaft, wherein the case and the case cover are covered with each other; the worm and the worm gear are installed in the case and meshed with each other, a driving shaft is inserted and fixed in the center of the worm gear, a crank synchronously rotating with the worm gear is fixed to the driving shaft in a sleeving manner, and a small shaft parallel to the driving shaft is arranged at the end of the crank in a protruding manner; the output shaft is arranged in the case and is parallel to the driving shaft, a rocking bar which synchronously rotates is fixedly mounted on the output shaft in a sleeving manner, a waist groove is formed in a bar body of the rocking bar, and the small shaft is arranged in the waist groove and can relatively slide; and the distance A between the center line of the small shaft and the center line of the driving shaft, the distance B between the center line of the small shaft and the center line of the output shaft when the small shaft slides to the maximum amplitude state in the waist groove and the distance C between the center line of the driving shaft and the center line of the output shaft meet the relation that A2+B2 = C2. When the crank drives the rocking bar to form a positive 90-degree included angle, the self-locking of the output shaft is realized; and the speed operation curves of the crank and the rocking bar are symmetrically and normally distributed, so that the operation shaking of a brake bar can be reduced.

Description

technical field [0001] The invention relates to the field of road toll stations and parking lot management equipment, in particular to a composite speed reducer used in an integrated barrier gate movement. Background technique [0002] Barrier gates, also known as car stoppers, are passage entrance and exit management equipment specially used to restrict motor vehicles on the road. They are now widely used in highway toll stations and parking lot systems to manage vehicle passages and to manage vehicle entry and exit. With the continuous development of the automobile industry and the increasing number of vehicles, the demand for barrier gates is also increasing, and higher requirements are put forward for the performance of barrier gates. The performance of the gate mainly depends on the movement of the gate. At present, the movement of the gate on the market generally adopts the transmission mode of the planar four-bar linkage mechanism, but this movement has the following ...

AI Technical Summary

Problems solved by technology

[0003] A. When the gate is closed or opened, it is difficult to realize the self-locking function of the gate lever, which causes the gear of the reducer to be impacted and the service life is low;

[0004] B. The speed curve of the up and down operation of the brake lever is not normally distributed, resulting in large vibration of the brake lever;

[0005] C. The distance between the main shaft of the movement and the output shaft of the reducer is large (at least about 200mm), the rigidity is poor, and the structure is large;

[0006] D. The transmission parts of the movement and the reducer are in an open layout, with many movement parts, many failure points, and high cost

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