Reducer brake for crane

Abstract

The invention discloses a reducer brake for a crane. The reducer brake comprises a friction static disc, a friction movable disc, a first combined seal, a piston, a second combined seal, adjusting devices, a spring device, a coupling, a pressure plate, a connecting plate, and a brake shell, wherein the friction static disc is located below the friction movable disc; the friction movable disc is located below the piston; the friction static disc is connected with gears of the brake shell; the friction movable disc is connected with gears of the coupling; the first combined seal and the second combined seal are distributed at the upper end and the lower end of the outer diameter of the piston; the spring device is located on the piston; the pressure plate is mounted in the connecting plate and is located on the spring device to press the spring device; the adjusting devices are mounted on the brake shell; and the lower ends of the adjusting devices are in contact with the pressure plate. The device has the characteristics of being small in friction coefficient, good in sealing effect, high in wear resistance, adjustable in braking torque of the brake, and smaller in axial spatial size.

Description

technical field [0001] The invention relates to a reducer brake for a crane, belonging to the technical field of reducer brake design. Background technique [0002] At present, when the crane reducer is working, it is often in a low-speed and heavy-load state, especially in an overload state, and the brake of the reducer is generally a normally closed brake. At the moment of starting and stopping, the brake needs to be opened and closed, and the brake is easy to withstand heavy loads. Large impact, in the prior art (CN203413005U-combined spring multi-friction plate rotary reducer brake) usually adopts two O-ring seals around the piston, and the O-ring is prone to wear and form leakage during the axial movement of the piston. Leakage, the brake cannot be completely disengaged, causing abnormal noise of the reducer, and at the same time, due to manufacturing errors, the opening pressure of the brake is too large or too small, and the opening pressure is too small, which may ca...

AI Technical Summary

Problems solved by technology

[0002] At present, when the crane reducer is working, it is often in a low-speed and heavy-load state, especially in an overload state, and the brake of the reducer is generally a normally closed brake. At the moment of starting and stopping, the brake needs to be opened and closed, and the brake is easy to withstand heavy loads. Large impact, in the prior art (CN203413005U-combined spring multi-friction disc rotary reducer brake) usually adopts two O-ring seals around the piston, and the O-ring is prone to wear and leakage during the axial movement of the piston. Leakage, the brake cannot be completely disengaged, causing abnormal noise of the reducer, and at the same time, due to manufacturing errors, the opening pressure of the brake is too large or too small, and the opening pressure is too small, which may cause the brake to not lock (due to the back pressure in the hydraulic system) , Excessive opening pressure may cause abnormal brake noise, and it is impossible to adjust the brake pressure

In addition, the crane reducer generally uses a cylindrical spring, resulting in a large space for the axial dimension of the brake

Images