Double-worm wheel accurate transmission mechanism

Abstract

The invention discloses a double-worm wheel precision transmission device which comprises a box body, a power input shaft and a power output shaft, and also comprises a worm and gear transmission pair, a worm and gear gap-adjusting pair and a gear transmission system. The worm and gear transmission pair comprises a worm wheel I and a worm I that are mutually meshed; the worm and gear gap-adjusting pair comprises a worm wheel II and a worm II that are mutually meshed; the meshed surface of the worm wheel I and the worm I and the meshed surface of the worm wheel II and the worm II have reverse directions; the worm wheel I and the worm wheel II have the same rotating direction and are arranged on the power output shaft in a parallel way; the worm I and the worm II are arranged in a parallel way; the power input shaft coordinates with the gear transmission shaft to input the power into the worm I and the worm II. The double-worm wheel precision transmission device of the invention can effectively improve the loading capacity and driving efficiency, has relatively high transmission precision, can effectively control the return difference, also called tooth clearance, can be applied in the fields of precision transmission and heavy-load power transmission, raises no special requirement for lead angle, transmitting ratio and the size of the worm wheel of the worm and gear pairs, has simple and contact structure and is quiet when operating.

Description

technical field [0001] The invention relates to a worm gear transmission device, in particular to a double worm gear precision transmission device. Background technique [0002] The worm drive is used to transmit the movement and power between the two shafts whose space is staggered into 90°, usually the worm is the active part. Compared with other mechanical transmissions, worm transmission has the advantages of large transmission ratio, compact structure, stable operation, and low noise, so it is widely used in various machines and instruments. [0003] With the development of production technology and the demand for high-quality products, especially the development needs of precision heavy-duty transmission, higher requirements are put forward for the control of transmission accuracy and backlash, that is, the backlash of the teeth. In the prior art, the gap adjustment method of worm gear and worm transmission uses a double-lead worm to realize the adjustment of the mesh...

AI Technical Summary

Problems solved by technology

However, this type of double worm anti-backlash method has limited bearing capacity and is mainly used in the field of precision transmission where the transmission load is not large. It is limited in the field of both precision transmission and heavy-duty power transmission; The worm lift angle is the same, the driving efficiency and the elimination of meshing backlash cannot be balanced, and the transmission gear is required to provide the same transmission ratio, which restricts the choice of its structure; this form is mainly suitable for occasions where the size of the worm wheel is small. The size of the transmission gear will increase simultaneously, resulting in a large size of the entire transmission mechanism

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