A rack and pinion driving device for an open bridge

Abstract

The invention relates to a gear rack driving device for a movable bridge, which is suitable for a single-span or double-span type vertically pivoted movable bridge. A gear rack transmission mechanism is used for realizing the opening and closing of the movable bridge; one end of a single-side rack is articulated with the side face of a movable span of the bridge; a motor drives a driving gear through a reduction gearbox, and the driving gear drives a driven gear so as to drive the single-side rack to stretch, thereby driving the opening and closing of the bridge; a polishing wheel rotates passively so as to play a supporting role; the gear rack transmission mechanism forms a transmission case which is fixed with a bridge upright column through an outer shell by virtue of bolts, a transmission case formed by an inner shell is articulated with the outer shell and can rotate around a plane perpendicular to the bridge upright column, and the inner shell is provided with a rack guide device so as to enable the rack to be always perpendicular to the center line of a transmission gear; the guide device can ensure a perpendicular normal meshing state of a gear rack and can ensure the transmission accuracy; and the opening and closing of a single span can be completed by two gear rack driving devices together. The gear rack driving device has the advantages of simple and compact structure, light weight, high rigidity, sensitive transmission, easy manufacturing, low cost, high forward efficiency and reverse efficiency, convenient arrangement, and the like.

Description

technical field [0001] The invention belongs to the technical field of driving devices for opening bridges, in particular to a rack and pinion driving device for opening bridges, which realizes the opening and closing functions of bridges. Background technique [0002] An open bridge refers to a bridge whose upper structure can be opened and closed by vertical rotation, horizontal rotation, lifting, etc. for the needs of navigation. When the land transportation is busy, there are ships sailing on the river and the fixed bridge cannot be built above the navigation clearance, it is necessary to build an open bridge to solve the water and land traffic. [0003] According to the movement mode of the movable span, the commonly used open bridges are divided into three categories: horizontal rotation type, vertical rotation type and vertical lifting type. Compared with the fixed bridge whose main girder cannot move, the open bridge can shorten the length of the approach bridge, re...

AI Technical Summary

Problems solved by technology

However, because the design of the open bridge requires an additional control system and regular maintenance, the technology is complicated, and the power consumption and electromechanical maintenance costs are expensive.

It is precisely because of these shortcomings of the open bridge that it limits its general application

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