A torque-increasing permanent magnet retarder

Abstract

The invention relates to a permanent-magnet retarder, in particular to a torque-increasing permanent-magnet retarder. The torque-increasing permanent-magnet retarder comprises a shell, a stator, a rotor, a rotor shaft and a combination assembly, wherein the combination assembly comprises a driven shaft, a first combination gear, a combination sleeve and a second combination gear, the combination sleeve can be arranged on the first combination gear in a sliding way, permanent-magnet structures are arranged on adjacent surfaces of the stator and the rotor and attract to each other, and a fact that a braking torque is obtained by a mode of cutting a magnetic induction line of a traditional permanent-magnet buffer through a magnetic conduction material is changed to a fact that the braking torque is obtained by direct attraction between permanent magnets. By the combination assembly, the connection / disconnection of power transfer is achieved, and the problem of power loss generally existing in the permanent-magnet retarder brought by magnetic leakage is solved; and meanwhile, by matching a rotor structure and a stator structure which is separately provided with the permanent magnets, the braking torque is increased, the usage number of the permanent magnets is greatly reduced on the condition of acquiring the same braking torque, and the cost is saved.

Description

technical field [0001] The invention relates to an automobile retarder, in particular to a permanent magnet retarder. Background technique [0002] Automobile retarder is a kind of automobile braking auxiliary device. At present, it is mainly electric eddy current retarder and hydraulic retarder. Other forms of retarder include permanent magnet retarder, self-excited retarder and so on. Among them, the permanent magnet retarder has the advantages of small size, light weight, and no energy consumption, so it has been paid more and more attention. [0003] At present, both domestic and foreign permanent magnet retarders use demagnetization to terminate the working state of the retarder. The degaussing method is generally to move or dislocate the magnet, and use magnetic materials to shield the magnetic force lines. But this has a disadvantage that the magnetic field cannot be completely shielded, so that the traditional permanent magnet retarder will consume a part of the pow...

AI Technical Summary

Problems solved by technology

But there is a disadvantage that the magnetic field cannot be completely shielded, so the traditional permanent magnet retarder will consume a part of the power of the car as long as the rotor rotates.

At the same time, the permanent magnet retarder also has the shortcomings of insufficient braking torque and difficult to achieve hierarchical control, which largely limits the market popularity of the permanent magnet retarder

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