Chain tensioning device and coal mining and conveying equipment

Abstract

The invention provides a chain tensioning device and coal mining and conveying equipment. The chain tensioning device comprises a shell, a driving device, a worm gear and worm mechanism and an idle gear; the driving device, the worm gear and worm mechanism and the idle gear are arranged inside the shell, an input shaft of the worm gear and worm mechanism is connected with an output shaft of the driving device, and the idle gear is matched with an output shaft of the worm gear and worm mechanism. The worm gear and worm mechanism of the chain tensioning device replaces an existing brake motor, and the driving device can be braked owing to the self-locking performance of the worm gear and worm mechanism. In addition, as the worm gear and worm mechanism is safe and reliable in brake performance as compared with the existing brake motor, an integral fault occurring rate of the chain tensioning device can be reduced, and the stability of the chain tensioning device can be improved. Besides, the structure of the worm gear and worm mechanism is simpler than that of the existing brake motor, the worm gear and worm mechanism is cheap as compared with the existing brake motor, accordingly, the structure of the chain tensioning device is simplified, and the cost of the chain tensioning device is lowered.

Description

technical field [0001] The invention relates to the field of coal mining conveying equipment, in particular to a chain tightening device and coal mining conveying equipment provided with the chain tightening device. Background technique [0002] At present, the chain tightening device of coal mining conveying equipment, such as scraper conveyor and coal plow, is usually composed of a high-voltage brake motor or a low-pressure brake motor with a pressure relief valve group, and is controlled by the built-in brake on the brake motor. Braking during chain tightening. [0003] However, the current high-voltage brake motor technology is still immature, and the high-voltage brake motor dedicated to scraper conveyors and coal plows has not been successfully developed. In addition, the low-pressure brake motor needs to be decompressed by the decompression valve group before entering the motor for braking. Since the decompression range is too large, it needs to go through multi-stag...

AI Technical Summary

Problems solved by technology

[0003] However, the current high-voltage brake motor technology is not yet mature, and the high-voltage brake motor for scraper conveyors and coal plows has not been successfully developed.

In addition, the low-pressure brake motor needs to be decompressed by the decompression valve group before entering the motor for braking. Since the decompression range is too large, it needs to go through multi-stage decompression. It is difficult to ensure the pressure stability after decompression, so it is easy to cause low pressure. The brake motor brake is damaged, the pressure reducing valve group is also prone to failure, and the overall failure rate is very high

In addition, the structure of the pressure reducing valve group is relatively complicated and expensive, which increases the manufacturing cost of the chain tightening device.

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