Overload protection device

Abstract

The invention provides a overload protection device, capable of keeping the rotary drive partition state and preventing from generating the vibration and noise because of the transference the path of the push pressure and accurately setting the operation torque and making a holding mechanism work reliably. the overload protection device has a central flange (110), a hub flange (131) and a push compressed plate for pushing a steel ball (120) to rotate and drive, wherein a holding mechanism (165) for keeping the partition in the over loading comprises a retaining ring (146) mounted at the central flange side of the push pressure plate (140) and a holding ball (145) arranged at the internal circumstance side of the central flange (110).

Description

technical field [0001] The present invention relates to an overload protection device for isolating rotation transmission when an overload occurs in a torque transmission mechanism. Background technique [0002] In the past, as an overload protection device that interrupts the rotation transmission when an overload occurs in the torque transmission mechanism, there are a central flange that holds the torque transmission element in a plurality of through holes provided in the direction of the rotation axis, and the central flange. A hub flange disposed axially opposite and having a concave portion engaged with the above-mentioned torque transmission element is disposed opposite to the above-mentioned central flange on a side opposite to the axial direction of the hub flange and directs the above-mentioned torque transmission element toward the above-mentioned A push plate that pushes in the direction of the hub flange. [0003] These overload protection devices 500, such as ...

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Problems solved by technology

[0010] However, the problem with this existing overload protection device 500 is that the steel ball 520 is always in the state of being pushed by the spring 550 after the rotation transmission is cut off, so when the rotation is continuously input, every time the steel ball 520 and the hub flange When the V-shaped cavity 532 of 531 is aligned (at least one rotation occurs once), the steel ball 520 is accommodated in the V-shaped cavity 532 and the rotation is transmitted again. However, if the overload is not eliminated at this time, the rotation transmission will be cut off again as described above, resulting in a large Large vibration and noise, and accelerate the wear of the various components of the overload protection device and a

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