External control type fan coupling device

Abstract

The invention provides an externally controlled fan coupling device, which has no restriction on the layout of the positional relationship between the electromagnetic induction coil and the valve element, can realize the simplification of the structure of the box body and the valve, and can prevent oil leakage and magnetic flux leakage , and has sufficient system versatility; in a fan coupling device, the fan coupling device has a structural type in which the interior of the sealed housing is divided into an oil storage chamber and a torque transmission chamber in which the drive disc is arranged by a partition, wherein the sealed housing The body is supported on the main body of the rotating shaft, the driving disc is fixedly installed on the main body of the rotating shaft, the driving torque is transmitted to the driven side by the oil supplied to the inside of the torque transmission chamber, and the oil flow is performed through the valve element operated by the actuator The opening / closing control of the channel; the fan coupling device includes a power supply transformer composed of a primary coil fixed to the outside and a secondary coil fixed to the main body of the rotating shaft and facing the primary coil in an opposite manner, and used in the secondary The current induced in the stage coil drives the actuator.

Description

technical field [0001] The present invention generally relates to an external control type fan coupling using a method of controlling rotation of a fan for cooling an engine in an automobile or the like in accordance with a temperature change or a rotation change of the external environment. Background technique [0002] Conventionally, as such a fan coupling device, there is known a fan coupling device having a structure in which the inside of a sealed case is divided into an oil storage chamber and a torque transmission chamber in which a drive plate is accommodated by a partition plate having an oil supply adjustment hole. A type in which the sealed housing is composed of a non-magnetic box and a cover mounted on the box, the sealed housing is supported on the rotating shaft main body (drive shaft) through a bearing, the driving disc is installed on the distal end of the rotating shaft main body, and A valve element with magnetism is arranged inside the oil storage chambe...

AI Technical Summary

Problems solved by technology

Therefore, the traditional fan coupling device has the defects that the layout of the positional relationship between the electromagnetic induction coil and the valve element is limited, the structure of the box and the valve becomes complicated, and the magnetic components used to form the magnetic circuit are added to the coupling. There are possible defects of oil leakage when inside the device, the defect that the leaked magnetism will increase due to the slender magnetic circuit, and the defect that the system has insufficient general characteristics for fan coupling devices of different sizes, etc.

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