Load-sensing proportioning valve assembly device

The utility model discloses a load-sensing proportioning valve assembly device. The load-sensing proportioning valve assembly device comprises a support, a screw, a load-sending spring, a pull rod, a balance swinging arm, pistons, a valve body, a balance shoulder pole, a tension spring, seal rings, a dust cover, balance steel balls, seal steel balls, a left oil inlet, a right oil outlet, a right oil inlet and a right oil outlet. An assembly is fixed to a vehicle body longitudinal beam through two installation holes in a part C of the valve body. The support on the part A of the valve body is connected with a rear axle. Meanwhile, the two oil inlets in the valve body are connected with two oil openings in a front end brake master cylinder through brake pipes respectively. The two oil outlets are connected with a left rear wheel brake cylinder and a right rear wheel brake cylinder respectively. The assembly is fixed between the vehicle body and the suspended rear axle. A load-sensing proportioning valve is suitable for an X-shaped cross braking loop by sending the distance change between the vehicle body and the rear axle; it is ensured that when the load-sensing pull rod is broken or not connected, due to the action of the tension spring, it is ensured that the rear wheel braking force is kept at a low value (smaller than or equal to a no-load inflection point value), and it is avoided that when the braking force is too large, the rear wheels are locked.