Eddy current permanent-magnet speed buffer

Abstract

The present invention relates to an eddy current permanent magnetism retarder, comprising a stator of a dead permanent magnet and a rotor which dose not rotates when non-retarding, the stator of a dead permanent magnet is coupled with a casing or a connecting support of a gearbox, and equispaced permanent magnets are distributed in the circumference direction, the non-permeability magnetic material is arranged between the two adjacent permanent magnets. The polarities of the two adjacent permanent magnets are contrary. The rotor is arranged outside the stator and supported at a rotation axis through a bearing, and an inertial type of synchronizer is arranged at the left end of the rotation axis. In normal condition, the inertial type of synchronizer breaks away from the rotor, and in the retarder location, the inertial type of synchronizer is combined with the rotor, the rotor is rotating corresponding to the stator. The rotor produces a braking moment. The invention has the advantages that the car dose not consume the energy when running, and the rotor is arranged outside the stator, timely emitting the heat caused by the rotor, cutting out the heat sink needed by the stator, simplifying the structure, and reducing the volume of the whole eddy current permanent magnetism retarder and protecting the enough moment used for retarding at the same time.

Description

technical field [0001] The invention relates to a vehicle auxiliary braking device, in particular to an eddy current permanent magnet retarder which eliminates energy consumption during non-braking. Background technique [0002] The car retarder is an auxiliary device for driving brakes, which applies the braking force to the output shaft to reduce the speed of the car, thereby improving the stability of the brake and the driving safety of the car. The current permanent magnet type eddy current retarder uses its own permanent magnet to form a magnetic field to generate a braking moment to play a retarding role. Therefore, it has the advantages of small size, light weight, energy saving and high braking efficiency. Compared with other types Automotive retarders have potential advantages. [0003] The eddy current retarder disclosed in U.S. Patent No. 5337862 is a typical permanent magnet retarder. This patent has two rows of permanent magnets arranged side by side along the ...

AI Technical Summary

Problems solved by technology

Since the rotor of the eddy current deceleration device does not rotate when it is not braking, it can reduce heat loss and improve the thermal cycle life of the stator. However, because the stator is surrounded by the rotor, the volume of the entire structure is relatively large, and the heat dissipation of the rotor is relatively large. Difficult, so the cooling ring can only be set in the stator, so that the structure is complicated and the volume is increased

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