Clearance eliminating device for gear pair

Abstract

The invention relates to the technical field of mechanical transmission manufacturing, in particular to a clearance eliminating device for a gear pair. The clearance eliminating device for the gear pair comprises a transmission shaft, a driven gear fixedly arranged on the transmission shaft, and a hydraulic system. A frictional damping disc and a rear cover are sequentially arranged on the left side of the driven gear. An oil cavity is formed between the frictional damping disc and the rear cover. A gearbox casing is located on the outer circumferential walls of the frictional damping disc and the rear cover. An oil port connected with the oil cavity is formed in the gearbox casing. According to the clearance eliminating device for the gear pair, hydraulic damping force is generated by the hydraulic system, and the driven gear in the gear pair is under the effect of frictional resistance in the transmission process, so that additional force is generated between tooth sides of the gear pair, and it is guaranteed that meshing teeth can be kept in the pressed state at all transmission moments in the transmission process of the gear pair.

Description

technical field [0001] The invention relates to the technical field of mechanical transmission manufacturing, in particular to a gear pair backlash elimination device. Background technique [0002] In the field of mechanical technology, some transmission equipment needs to meet strict transmission ratios, and the error should be as small as possible. For example, the gear transmission pair or worm pair in the feed mechanism transmission system of some precision machine tools. Installation error, or with the accumulation of time, the wear between the transmission pairs increases, resulting in an increasing clearance of the transmission parts, which affects the efficiency of the transmission and the accuracy of manufacturing. At this time, it is necessary to eliminate the transmission clearance. this problem. [0003] At present, it is mainly considered from the following aspects. It can be done by staggering the teeth, changing the center distance, or splitting the gear and ...

AI Technical Summary

Problems solved by technology

[0002]In the field of mechanical technology, some transmission equipment needs to meet strict transmission ratio, and the error should be as small as possible, such as the feed mechanism transmission system of some precision machine tools Due to the manufacturing error and installation error of the gear transmission pair or worm pair, or the accumulation of time, the wear between the transmission pairs is intensified, resulting in an increasing gap between the transmission parts, which affects the efficiency and efficiency of the transmission. The precision of machining and manufacturing, at this time, it is necessary to solve this problem by eliminating the transmission gap

[0003] At present, it is mainly considered from the following aspects, which can be adjusted by staggering the teeth, changing the center distance, splitting the gear and adding elastic parts, and using the double-lead worm These methods either eliminate the backlash by changing the radial or axial distance of the gear pair, or use the elastic force of the spring to compress the paired tooth surface. These methods are all mechanical clearance methods. All have similar defects, such as in the transmission process, the spring preload is unstable, the tooth surface cannot be automatically compensated after the tooth surface is worn, and the adjustment is inconvenient, etc.

Images