Current variable retarding brake

Abstract

The invention discloses a current slowing brake device. The brake device comprises a first seal work cavity arranged on the radial outer side of an output shaft, an inner friction plate and an outer friction plate are arranged in the first work cavity, the outer wall of the output shaft is sleeved with the inner friction plate, the inner friction plate and the output shaft are fixed, the outer wall of the output shaft is sleeved with the outer friction plate, and the outer friction plate and the side wall of the first work cavity are fixed, the inner friction plate and the outer friction plate are sequentially and alternatively arranged in the axial direction of the output shaft, a gap is reserved between the inner friction plate and the outer friction plate adjacent to the inner friction plate, the inner friction plate and the outer friction plate are insulated, and the first work cavity is filled with electrorheological fluid. The output shaft, the side wall of the first work cavity, the surface of the inner friction plate and the surface of the outer friction plate are all good conductors. According to the current slowing brake device, through continuous control over the additional electric field, continuous control and adjustment of brake force can be achieved, the structure is simple, the weight is small, and the reaction speed is high.

Description

technical field [0001] The invention relates to a vehicle braking device, in particular to a retarding brake with continuously adjustable braking force. Background technique [0002] The rapid development of the automobile industry has provided a major growth point for the country's economic development, but the number of deaths and injuries caused by car accidents every year is also increasing rapidly. According to the survey of relevant agencies, in the traffic accidents that occurred in recent years, the accidents caused by the bad braking system accounted for 40%, and the traffic accidents directly caused by the brake failure alone have exceeded 20%. It can be said that the brake system problem is the number one cause of traffic accidents. With the development of automobile dynamics and road conditions, traditional service brakes have gradually sacrificed the performance under high frequency and long-term braking in order to achieve faster braking. Frequent and high-int...

AI Technical Summary

Problems solved by technology

Under the same conditions, the hydraulic retarder can provide a larger braking torque with a smaller mass and volume, while the quality of the eddy current retarder is generally three times the mass of the hydraulic retarder, but the eddy current The response time of the retarder is fast, about 40ms, and the structure is relatively simple; the structure of the hydraulic retarder is complex, and the response time is slower than the eddy current retarder, about 800ms

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