A pull-out switch cabinet drawer push device

Abstract

The invention provides a drawer pushing device for a draw-out switch cabinet. The drawer pushing device comprises a fixing bracket, wherein a pushing screw (3) is arranged on the fixing bracket; the pushing screw (3) is provided with a plurality of spiral grooves which can be engaged with a positioning member on a bottom plate of a drawer; a shaft sleeve gear (1) is fixedly arranged on a driving shaft; a positioning wheel is meshed with the shaft sleeve gear (1); the positioning wheel comprises a front end surface and a rear end surface; the outer peripheral edge of the rear end surface of the positioning wheel is provided with a plurality of drawer moving position positioning grooves; a positioning shaft is arranged on the fixing bracket; the positioning shaft comprises a positioning spring which can bias the positioning shaft to the positioning wheel; the positioning shaft can be matched with the drawer moving position positioning grooves; a radial locking groove (19) is arranged on the front side face of the positioning wheel.

Description

technical field [0001] The invention relates to a low-voltage withdrawable switchgear, in particular to a hand-cranked positioning drawer propulsion device. Background technique [0002] A drawer is an effective device for pushing switchgear, especially a switchgear, to switch on and off, and many descriptions have been made about its propulsion device in the prior art. In document 1 of the prior art (application number CN200810019160.5), the turntable of the propulsion mechanism is not a three-position type, and the operator needs to manually determine the amount of rotation and the stroke during the propulsion process of the drawer. The corresponding relationship between the transmission mechanism and the stroke is relatively high. More importantly, for the turntable, the locking interlock mechanism is only a state lock under a certain stroke state, and there is no special connection Further locking in the state; although it sets a kind of locking on the external rotating...

AI Technical Summary

Problems solved by technology

Its locking pin matched with the locking hole in the three-position turntable is manually pulled and closed, and has a spring, and it can touch the auxiliary switch through the mechanical arm during the pulling and closing process, so as to realize the breaking of the auxiliary switch. Electricity or energization; however, for the position state after closing, it is only fixed by an interlocking locking mechanism for the rotating shaft

It is also not for the turntable, the reliability of this locking is low, and it cannot be locked automatically, and the structure is complicated

This setting firstly requires high transmission device, which increases the cost. Moreover, it does not provide enough protection for the connection state, which makes the connection state of the drawer less stable and less safe.

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