An Improved Main Shaft Locking Device and Its Application

Abstract

The invention discloses an improved locking device for a main rotating shaft. The device is characterized in that a torsional spring which can overcome screwing frictional resistance between the main rotating shaft and a connecting nut is additionally arranged between the connecting nut and the main rotating shaft so as to prevent the main rotating shaft from uncontrollable high-speed rotating caused by human errors; the connecting nut can overcome the thread frictional force relative to the main rotating shaft under the effect of the inverted torsion of the torsional spring, and thus the connecting nut can be rotated relative to the main rotating shaft, and as a result, the main rotating shaft can be braked. The invention also provides another scheme for locking the main rotating shaft. The scheme is characterized in that an inner pawl which can be limited through an elastic connector is arranged on a flywheel disc; in case that the main rotating shaft is subjected to uncontrollable high-speed rotating, the outward centrifugal force of the inner pawl on the flywheel disc can be utilized to overcome the tensioning force of the elastic connector, thus the inner pawl can be locked to an inner ratchet wheel, and as a result, the function of locking the main rotating shaft can be further achieved.

Description

technical field [0001] The invention relates to a locking device, in particular to a locking device for a main rotating shaft. Background technique [0002] The circuit breaker of the existing switch cabinet generally solves the problem of the circuit breaker entering and exiting the switch cabinet through a lifting transfer vehicle (lifting handcart). Refer to the published patent document CN 201694790U, which discloses a lifting transfer vehicle with a reduction gear mechanism, such as figure 1 As shown, by manually turning the hand crank 1a of the lifting mechanism, the hand crank 1a will drive the main shaft 4a to rotate, thereby driving the main shaft 4a to drive the pinion 5a to rotate; through the pinion 5a and the large tooth of the double gear 3a 31a, the small tooth 32a of the double gear 3a meshes with the large gear 6a to achieve a two-stage deceleration, and the large gear 6a drives the wire wheel 7a to rotate, thereby driving the wire rope wound on the wire whe...

AI Technical Summary

Problems solved by technology

[0002] The circuit breaker of the existing switch cabinet generally solves the problem of the circuit breaker entering and exiting the switch cabinet through a lifting transfer vehicle (lifting handcart). Refer to the published patent document CN 201694790U, which discloses a lifting transfer vehicle with a reduction gear mechanism, such as figure 1 As shown, by manually turning the hand crank 1a of the lifting mechanism, the hand crank 1a will drive the main shaft 4a to rotate, thereby driving the main shaft 4a to drive the pinion 5a to rotate; through the pinion 5a and the large tooth of the double gear 3a 31a, the small tooth 32a of the double gear 3a meshes with the large gear 6a to achieve a two-stage deceleration, and the large gear 6a drives the wire wheel 7a to rotate, thereby driving the wire rope wound on the wire wheel 7a to go up and down, thereby pulling the guide rail. Slow lifting or lowering solves the safety problem of transferring the circuit breaker outside the cabinet, but with this solution, when transferring the circuit breaker or other objects, the human hand cannot leave the hand handle 1a, otherwise the object will fall by itself due to its own weight , causing damage to the transshipment object

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