Auxiliary braking system of off-highway dumper

By designing a hydraulic caliper disc auxiliary braking system on off-highway dump trucks, the problems of thermal fade and motor reverse drag braking failure of pneumatic drum braking systems under heavy loads on downhill slopes are solved. This provides redundant parking braking force, ensures that the braking torque matches the load, and improves safety and reliability.

CN224392576UActive Publication Date: 2026-06-23SHAANXI TONLY HEAVY IND
0 Cites 0 Cited by

Patent Information

Application Number
CN202521406465.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-07
Publication Date
2026-06-23
Estimated Expiration
2035-07-07

AI Technical Summary

Technical Problem

The existing pneumatic drum braking system of off-highway dump trucks is prone to insufficient braking force due to thermal fade when going downhill under heavy load, and the motor reverse drag braking fails when the high-voltage battery pack is overcharged, which poses a safety hazard. An independent auxiliary braking scheme is needed to provide redundant parking braking force.

Method used

Design a hydraulic caliper disc auxiliary braking system that is connected in parallel with the original vehicle parking brake system. High-pressure oil is stored through a hydraulic control unit and an accumulator. The auxiliary brake is installed on the drive shafts of the middle and rear axles. The braking state is switched using an electromagnetic reversing valve and a manual reversing mechanism. An overflow valve and a pressure detection unit are integrated to ensure the system's safety and reliability.

Benefits of technology

When the main braking system experiences thermal fade or failure, it quickly provides additional parking braking force, improving safety during heavy-load downhill driving and parking, ensuring that the braking torque matches the vehicle load, avoiding insufficient braking force or overload, and the system is independent and has a fast response speed, thus improving the overall vehicle safety.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The utility model discloses an auxiliary braking system of an off-highway dump truck, which belongs to the technical field of braking of off-highway dump trucks and comprises a hydraulic caliper disc type auxiliary brake mounted on a transmission shaft of a middle axle and a transmission shaft of a rear axle, and a hydraulic control unit consisting of a hydraulic power unit, an auxiliary brake valve, an energy accumulator and a connecting pipeline, the hydraulic power unit is connected with the steering hydraulic oil tank and the auxiliary brake valve, and the energy accumulator supplies high-pressure oil to the auxiliary brake through the auxiliary brake valve to relieve braking. The system is mainly used for improving the parking braking safety and braking force of the off-highway dump truck, is suitable for vehicles with the designed load of 90 tons or below, provides redundant braking guarantee for the off-highway dump truck, and achieves quick response and auxiliary braking when main braking fails.
Need to check novelty before this filing date? Find Prior Art