Propulsion device of primary contact of low-voltage switch cabinet

Abstract

The invention relates to a propulsion device of a primary contact of a low-voltage switch cabinet, which comprises a rack 7, a transverse square bar 4, a longitudinal square bar 6, a straight-toothed gear 3, a longitudinal angular wheel 5 and a transverse angular wheel 8, wherein the transverse square bar 4 and the longitudinal square bar 6 are fixed on a drawer body and can rotate along an axial direction, the longitudinal angular wheel 5 is fixed at the end part of the longitudinal square bar 6, the transverse angular wheel 8 is fixed at the middle part of the transverse square bar 4, the modulus of the longitudinal angular wheel 5 is the same as the modulus of the transverse angular wheel 8, the straight-toothed gear 3 is fixedly distributed on the transverse square bar 4, and the rack 7 is matched and engaged with the straight-toothed gear 3; and the transverse square bar 4 and the longitudinal square bar 6 are vertically installed at 90 degrees, so that the longitudinal angular wheel 5 and the transverse angular wheel 8 are engaged. When one end of the longitudinal square bar 6 is installed, one end of the longitudinal square bar 6 exposes out of the end face of the drawer, and the rack 7 is fixedly connected with a pin box of a movable contact.

Description

technical field [0001] The invention relates to a low-voltage switchgear primary contact propulsion device in low-voltage complete switchgear and control equipment, and belongs to the technical field of low-voltage electrical appliances. Background technique [0002] National standard GB7251.1-2005 "Low-voltage complete switchgear and control equipment" and JB9661-1999 "Low-voltage withdrawable complete switchgear" and other standards stipulate that the withdrawable low-voltage complete set must have three positions: connection, test and separation In the test position, the primary main circuit (including incoming and outgoing lines) of the functional unit is separated from the power supply, while the secondary auxiliary circuit is still connected, and it is required that the unit door cannot be opened at the test position, without reducing the protection level of the enclosure. In order to adapt to the new national standard, each manufacturer improves the design on the basi...

AI Technical Summary

Problems solved by technology

In order to adapt to the new national standard, each manufacturer improves the design on the basis of the original mechanism, for example, the known Chinese patent No. 03240748.3 is disclosed in the utility model patent specification entitled "Propulsion Mechanism for Low-Voltage Drawer Type Switchgear". Although the propulsion mechanism can meet the requirement of not opening the door at the test position, the connection or separation of the dynamic and static contacts needs to drive the entire drawer body to move. Since there are other electrical components installed in the drawer body of the low-voltage switchgear, the electrical components follow the drawer body. Move together, so on the one hand, the electrical components will inevitably vibrate during the moving process, on the other hand, the weight of the drawer will also make the operation of entering and exiting more laborious

Another example is the known Chinese patent No. 200410064770.9, which is titled "Movable Propelling Continuous Drawer Functional Unit". The design is too complex and bulky

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