Four-speed electromagnetic fan clutch

Abstract

The invention discloses a four-speed electromagnetic fan clutch. A driving disc is connected to one side of a main shaft; an electromagnetic iron core is embedded into the driving disc; a fist coil and a second coil are arranged in the electromagnetic iron core; a fan fixing disk is arranged on the other side of the main shaft; a first magnetic fixing disk in which a first permanent magnet is embedded is arranged between the fan fixing disk and the driving disc; the first magnet fixing disk and the fan fixing disk are respectively connected with a first sucking disk and a second sucking disk through elastic sheets; a third sucking disk is also arranged on the four-speed electromagnetic fan clutch; the centers of the first sucking disk, the second sucking disk and the third sucking disk are superposed; a second magnet fixing disk in which a second permanent magnet is embedded and a drive disc are sequentially arranged between the fan fixing disk and the first magnet fixing disk; the drive disc is fixedly connected onto the fan fixing disk; iron parts are arranged at the positions, which correspond to the first permanent magnet and the second permanent magnet, of the drive disc; the first magnet fixing disk and the second magnet fixing disk are sleeved on the main shaft through a composite bearing and are respectively and fixedly connected with an outer ring and an intermediate ring of the composite bearing; the third sucking disk is connected with the intermediate ring of the composite bearing through an elastic sheet; and a third coil is also arranged in the electromagnetic iron core.

Description

technical field [0001] The invention relates to the field of automobile engine cooling systems, in particular to an electromagnetic fan clutch used for engine cooling. Background technique [0002] At present, high-power automobile engines at home and abroad have fully adopted three-speed electromagnetic fan clutches, which play an irreplaceable role in effectively reducing automobile noise, fuel consumption and emissions. Three-speed electromagnetic fan clutch, such as the patent application of the applicant with the publication number 201198783, the operating speed of its fan can be automatically run at idling, medium speed and high speed according to the requirements of the engine water temperature. But this kind of electromagnetic fan clutch can only reach 30% to 50% of the high speed during the normal operation of the vehicle. In the process of high-speed transition, the impact is relatively large, which will easily cause certain damage to the engine belt, and cause ce...

AI Technical Summary

Problems solved by technology

But this kind of electromagnetic fan clutch can only reach 30% to 50% of the high speed during the normal operation of the vehicle. In the process of high-speed transition, the impact is large, which is easy to cause certain damage to the engine belt, and has a certain fluctuation effect on the output power of the engine, making the user's judgment on the power of the engine inaccurate

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