Worm and gear drive mechanism and worm and gear speed reducer

Abstract

A worm gear transmission structure and a worm gear reducer, including a worm gear and a worm, wherein the worm gear includes a toothed plate and a worm shaft arranged coaxially, the worm includes helical teeth and a worm shaft, the toothed plate and the helical teeth mesh with each other, and the worm includes a barrel Shaped gear bar, the helical teeth are arranged on the outer periphery of the gear bar, and the worm shaft runs through the gear bar and is arranged coaxially with the gear bar; the radial position between the gear bar and the worm shaft is fixed, and at the same time, the gear bar slides and translates along the axial direction of the worm shaft. The worm shaft can be used for a long time because it is a non-wearing part, and the gear rod as a wearing part can be replaced at any time according to the usage situation, and the standardization and serialization of products can also be realized according to requirements. Since the toothed rod can slide and translate freely on the worm shaft, it can eliminate the poor meshing state of the fixed point caused by the error of the tooth profile. In addition, the present invention can be applied to the installation and use environment where the worm is in a non-horizontal state, which fills the gap in the industry.

Description

technical field [0001] The invention relates to the technical field of mechanical transmission, in particular to a low-cost worm gear transmission structure and a worm gear reducer with longer service life. Background technique [0002] The worm gear transmission structure is a power transmission mechanism, which is often used in speed reduction models. By using the speed converter generated by gear meshing, the rotation speed of the motor (motor) is reduced to the desired rotation speed, and a large torque mechanism is obtained. . [0003] In the mechanism currently used to transmit power and motion, the application range of the reducer is quite wide. In structural design and manufacture, usually the helical teeth on the periphery of the worm and the transmission shaft are integrated. Therefore, the tooth shape and the transmission shaft connected together must have a more precise coaxiality requirement, and at the same time, the worm shaft support also has a precise coax...

AI Technical Summary

Problems solved by technology

After the worm gear and worm transmission structure in the prior art is used for a certain period, due to tooth wear, the meshing between the teeth will be poor, the noise will increase, and the transmission speed ratio will also change. In this case, the entire worm will eventually be scrapped or the overall transmission is discarded

From another feature of worm gear transmission, the traditional worm gear transmission structure bears a large axial force during operation. Therefore, for a worm gear that is loaded in one direction for a long time, the single-sided tooth profile wears seriously. , and because the overall worm is inconvenient to adjust the axial position, usually the only way to solve tooth wear is to replace the new worm

In addition, the worm gear and worm gear transmission structure in the prior art and the reducer using this transmission structure must ensure that the worm is always in a horizontal state in actual use, otherwise the transmission meshing accuracy of the worm gear and worm will be reduced, resulting in poor transmission

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