A low pressure drawer type driving mechanism applied for switchboard drawer

Abstract

The invention relates to a low-voltage draw-out switch gear, in particular to a propulsion mechanism for a drawer of a low-voltage draw-out switch cabinet, including a precession mechanism and a three-position locking mechanism, wherein, the precession mechanism includes a transmission spiral which is arranged on a bottom board of the drawer by a support and a groove-shaped locating piece which is inosculated with the transmission spiral and pushes the drawer to move forward and backward and is arranged on a layer board of a cabinet body; the positioning with the linear movement of the drawer is carried out by a spiral protrusion of the transmission spiral and a chute of the groove-shaped locating piece, so as to ensure the drawer not to be skewed and generate a mechanical movement dead point when the drawer receives the reverse withdrawal force. The invention adopts the multi-ring effort-saving propulsion principle of the transmission spiral to ensure the effort-saving propulsion of the drawer, creatively utilizes the spiral protrusion of the transmission spiral and the chute of the groove-shaped locating piece to effectively control the balanced movement of the drawer and fully controls the drawer to be balanced absolutely and not be skewed when the drawer receives the reverse withdrawal force, the operation is flexible and easy, and the operating mechanical faults can be eliminated.

Description

Technical field [0001] The invention relates to a low-voltage withdrawable switchgear, in particular to a push mechanism for a drawer of a low-voltage withdrawable switch cabinet. Background technique [0002] Low-voltage withdrawable switchgear is widely used at home and abroad and has a large quantity, and new technologies are constantly introduced at home and abroad to meet market demand. The drawer technology is the key to determine the performance of the drawer switchgear, and the drawer propulsion mechanism is the core component of the drawer. The rationality of the propulsion mechanism will determine the advancement of the drawer technology. The drawer operation of the withdrawable switchgear should be flexible and convenient. However, the technology of the drawer propulsion mechanism at home and abroad has its own defects, mainly in the large operating force, many mechanical dead points, serious jamming, low versatility, and inconsistent operating force after the dr...

AI Technical Summary

Problems solved by technology

The harder the operator turns the mechanism, the more severe the deformation of the bottom plate of the drawer will be, and the dead point will increase, until finally it cannot be operated.

Or even if the drawer can be pushed to the connection position, because the drawer is in a skewed state, the main and auxiliary circuit plugs are in poor contact, and the temperature rise is high, resulting in an increase in the electrical failure rate

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