Hengyang Heavy Industry Hydraulic Wheel Side Brake Brake block action adopts linkage structure YLBZ25-160

Technical Realisation Elements:

In response to the above problem, the present invention aims to provide a free-standing hydraulic wheelside brake that can avoid oil leakage and improve the safety of the host equipment.

The technical solution for solving the problem of the present invention is: an independent hydraulic wheelside brake comprising a symmetrically disposed pair of clamp arms, a clamp seat, a symmetrically disposed pair of gate tiles, a valve block with a built-in oil passage, a spring-loaded hydraulic cylinder, a hydraulic pump mounted on the valve block, and a hydraulic valve manifold mounted on the valve block, with the hydraulic pump connected to a motor;

The said spring hydraulic cylinder includes a hollow cylinder, a piston set in the cylinder; in the cylinder, a pressure chamber is located on one side of the piston, a back pressure chamber is located on the other side of the piston, an oil inlet is provided at the pressure chamber, an oil return port is provided at the back pressure chamber, and an oil passage of the valve block is connected with the oil inlet and the oil return port in pairs;

A pressure end guide rod is provided on the end face of the piston facing the pressure chamber, which extends from one end of the cylinder body;

a spring is provided in the cylinder body, one end of the spring being fixedly connected to the end face of the cylinder body and the other end being resisted against the end face of the piston which is not provided with the pressure end guide rod;

Of the clamp arms, one of the clamp arms is hinged to the pressure end guide rod and the other clamp arm is hinged to the end of the cylinder body provided with the spring;

One end of said clamp holder is hinged to one of the clamp arms and the other end of the clamp holder is hinged to the other clamp arm;

A pair of gate tiles are each hinged to an end of the pair of clamp arms in correspondence.

In the above scheme, the traditional form of one tow more is cancelled, and a highly integrated hydraulic drive method is adopted, which does not require the use of oil pipes and connectors, and produces a product with a compact structure, reliable sealing, timely action, and respective independent work.

In one specific programme, the chamber formed by the end face of said piston without a pressure end guide rod in the inner wall of the cylinder block is a back pressure chamber, and said spring is located in the back pressure chamber.

In another specific embodiment, there is provided in the cylinder body, on the side of the end face of the piston which is not provided with a pressure end guide rod, the chamber between the oil separating wall and the end face of the piston which is not provided with a pressure end guide rod is a back pressure chamber, the oil separating wall and the inner wall of the cylinder body on the side away from the piston are enclosed to form a spring cavity, and said spring is located in the spring cavity;

On the end face of the piston facing the back-pressure cavity there is a back-pressure end guide rod, the back-pressure end guide rod can pass through the oil separator wall to extend into the spring cavity; the spring is fixedly connected to the end face of the cylinder at one end, and the other end and the end face of the back-pressure end guide rod against the back-pressure end guide rod;

The distance between the end of the back pressure end guide rod and the end of the pressure end guide rod is greater than the sum of the widths of the back pressure cavity and the pressure cavity.

Preferably, an adjusting screw is provided between the pressure end guide rod and the clamp arm, the adjusting screw being threaded to the pressure end guide rod at one end and hinged to the clamp arm at the other end.

The adjusting screw can be used to adjust the length of the pressure end guide rod extending into the pressure chamber to compensate for the gap after wear of the gate tile.

Specifically, said hydraulic valve group includes a relief valve, a check valve, an electromagnetic reversing valve, and a pressure relay;

Said solenoid reversing valve P port is connected to a hydraulic pump, and a check valve and a relief valve are provided between the solenoid reversing valve and the hydraulic pump;

Said T port of the electromagnetic directional valve is connected to the spring hydraulic cylinder return port;

said port A of the electromagnetic directional valve is connected to the spring hydraulic cylinder inlet port, and a pressure relay is provided between the electromagnetic directional valve and the spring hydraulic cylinder inlet port.

Preferably, a handwheel coaxial with the output shaft of the motor is provided on the motor. The handwheel is used to disc the hydraulic pump for temporary manual opening of the brake.