The structure of the electro-hydraulic brakes

The bridge inspection vehicle runs on the inspection track of the bridge. When the bridge inspection vehicle stops, the electric hydraulic actuator is powered off, the push rod is retracted (the electric hydraulic actuator has a built-in reset spring), the pressure spring is returned, and the brake pad is extruded to the track to reach the braking state.
When the bridge inspection car is driving, the electric hydraulic actuator is energized, the push rod is pushed out, and after the brake lever is increased, the pressure spring is compressed, so that the brake pad of the brake lever is separated from the track, the brake is opened, and the bridge inspection car can be driven.
A cage for limiting the pressure spring is arranged between the brake lever and the frame. The cage can better limit the position of the pressure spring, and ensure that the brake pad and the track of the brake lever are well squeezed when the brake is needed to achieve braking.
The cage comprises a guide sleeve hinged with the brake lever and a guide post hinged with the frame. The guide sleeve is connected to the outer side of the guide post, and the pressure spring is arranged between the guide sleeve and the guide post.
The pressure spring can provide a good separation force to the guide sleeve and the guide column, and the guide sleeve and the guide column cooperate to ensure the accurate thrust direction of the pressure spring, and realize the good extrusion of the brake pad and the track.
The guide sleeve is hinged with the brake lever through a screw, and the guide sleeve is threaded to the outside of the screw, and a nut for limiting the position of the guide sleeve is also threaded to the screw.
The guide sleeve can be fixed at any position on the screw, which is convenient to adjust the pre-pressure and stroke of the pressure spring, so that the brake effect can be improved by adjusting the position of the guide sleeve after the brake pad is worn.
A stop block with limited rotation Angle of the guidance column is provided at the articulation point between the guide column and the frame.
Limit the rotation Angle of the guide column to control the swing of the pressure spring within a reasonable Angle range to prevent the separation of the guide sleeve and the guide column, and the brake failure and parts damage caused by the instability of the pressure spring.