Overload detection mechanism for motor-driven linear actuator

Details Overload detection mechanism for motor-driven linear actuator Overload detection mechanism for motor-driven linear actuator

1989-02-28

1990-03-20

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Linear

310 23, 335258, 192143, H02K 4100, F16D 7100

Patent

active

049104195

ABSTRACT:
In a linear actuator comprising a motor-driven screw shaft, an overload detection mechanism comprises a pair of cup-shaped spring seats with substantially cylindrical portions. The spring seats are mounted at one end of the screw shaft by a pair of bearings and have a spring therebetween under a predetermined preload. Limit switches are provided for detecting overload on the screw shaft as a result of axial movement of the spring seats. The cylindrical portions of the cup-shaped spring seats serve as strikers for said limit switch means.

REFERENCES:
patent: 4282501 (1981-08-01), Myers
patent: 4766405 (1988-08-01), Daly et al.

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