Single-crank composite small-tooth-difference speed reducer

Abstract

The invention belongs to the technical field of speed reducers and relates to a single-crank composite small-tooth-difference speed reducer. A first-stage fixed-shaft gear comprises an input gear shaft, an intermediate gear arranged outside the input gear shaft, an intermediate gear fixing sleeve fixed on a left large end cover through a key and a retainer ring and an inner gear sleeve sleeved outside the intermediate gear fixing sleeve. A second-stage small-tooth-difference involute variable-tooth-thickness gear comprises two involute variable-tooth-thickness outer gears and a rigid disc, wherein the two involute variable-tooth-thickness outer gears are sleeved outside an inner gear sleeve in a parallel rotating mode, the involute variable-tooth-thickness outer gears are sleeved with involute variable-tooth-thickness inner gears, and clearance adjusting devices are arranged between the involute variable-tooth-thickness outer gears and the inner gear sleeve. Single-crank integrated bearing design and involute variable-tooth-thickness gear transmission are adopted in gear transmission, the number of transmission components is reduced, the tooth side clearance of a gear pair in the meshing process is reduced through the clearance adjusting device, and the precision, the bearing capacity and the service life of the speed reducer are improved.

Description

technical field [0001] The invention belongs to the technical field of reducers, and relates to a single-crank composite reducer with less tooth difference, in particular to a reducer with less tooth difference, high precision and high load-carrying capacity through the improvement of the transmission chain form and single crankshaft of the reducer device. Background technique [0002] The reducer widely used in the joints of industrial robots is mainly composed of a first-stage planetary gear mechanism and a first-stage cycloidal pinwheel mechanism. Cycloidal pinwheel transmission is a device that utilizes the meshing of cycloidal wheel and pin teeth to realize motion and power transmission. It has many advantages such as large bearing capacity, high transmission precision, and small size of the device. However, the processing of the cycloidal pinwheel requires advanced special equipment, the process system is complex, and the cycloidal pinwheel is sensitive to machining e...

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Problems solved by technology

[0003] In view of this, in order to solve the problem of large machining error and high production cost in the preparation of the eccentric body on the eccentric shaft in the reducer by using the existing technology, the present invention provides a single-crank composite reducer with small tooth difference, by adopting the first The first-stage fixed-axis gear transmission and the second-stage involute variable-tooth-thickness gear transmission are combined, and by improving the design of the single crankshaft and the gap adjustment mechanism, a gear that can improve the bearing capacity, transmission accuracy and service life of the reducer is obtained. Single crank compound gear reducer with few teeth difference

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