Underground scraper parking brake reducer

Abstract

The invention belongs to the field of mining machines, and particularly relates to an underground carry-scraper parking brake speed reducer. The underground carry-scraper parking brake speed reducer comprises a gear speed reducer, a parking brake and a motor. An input shaft of the gear speed reducer is located inside a brake shell. A first friction plate and a second friction plate inside the brake shell are connected with the brake shell and the input shaft through splines respectively. The input shaft and an output shaft of the motor are connected into a whole through a connecting sleeve. The connecting sleeve is sleeved with a piston. A reset spring is installed on the end face, close to one end of the motor, of the piston in the axial direction. An annular limiting boss is arranged on the circumference of the rear portion of the piston. A limiting groove for allowing the limiting boss to axially move is formed in the inner wall of the brake shell. A cavity between the limiting boss and the limiting groove is a sealed oil way. When the underground carry-scraper parking brake speed reducer is applied, a variable pump and an oil supplementary pump of a carry-scraper supply oil to the motor and the parking brake respectively; when the variable pump stops supplying oil to the motor, the oil supplementary pump stops supplying oil to the parking brake, and meanwhile the braking action is performed, so that the whole vehicle parking brake is achieved, and the braking effect is good.

Description

technical field [0001] The invention relates to a parking brake reducer for an underground scraper, which belongs to the field of mining machinery and equipment. Background technique [0002] At present, the parking brake devices of domestic underground scrapers generally use caliper disc brakes and pin brakes, such as image 3 shown. The caliper disc brake 27 is installed on the brake disc 28, which is mainly composed of brake block I, brake block II and brake body; the brake disc 28 is installed on the output shaft of the gear reducer 1, and the motor 4 and the gear reducer The device 1 is fixed as a whole with bolts, and the power is input through the connecting sleeve 3. When the underground scraper is parked on a slope, the brake pads I and II of the caliper disc brake 27 tighten the brake disc 28, and the brake disc 28 locks the output shaft of the gear reducer 1, thereby playing the role of parking brake. effect. However, there are still problems such as small bra...

AI Technical Summary

Problems solved by technology

However, there are still problems such as small braking area, high unit pressure, high requirements on the material strength of the brake block and high pressure resistance at high temperature, and at the same time, due to long-term exposure to dark and humid underground, mud and ore dust can easily enter the caliper disc brake. 27 and gear reducer 1, it is also easy to cause leakage at the seal of the brake or damage to the internal gear of gear reducer 1, which will eventually lead to brake failure

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