题目

桥式起重机广泛地应用在室内外仓库、厂房、码头和露天贮料场等处.桥式起重机可分为普通桥式起重机、简易粱桥式起重机和冶金专用桥式起重机三种.
普通桥式起重机一般由起重小车、桥架运行机构、桥架金属结构组成.起重小车又由起升机构、小车运行机构和小车架三部分组成.
起升机构包括电动机、制动器、减速器、卷筒和滑轮组.电动机通过减速器,带动卷筒转动,使钢丝绳绕上卷筒或从卷筒放下,以升降重物.小车架是支托和安装起升机构和小车运行机构等部件的机架,通常为焊接结构.
本次设计大车运行机构采用分别驱动、即两边的主动车轮各用一台电动机驱动.

提问时间：2020-12-06

答案

Bridge crane widely used in indoor and outdoor warehouses, factories, docks and outdoor storage yard, etc.. Bridge crane bridge crane can be divided into ordinary, simple beam bridge crane and metallurgical three special bridge crane.
   General by the general bridge crane lifting trolley, bridge run institutions, the structure of the composition of the metal bridge. Car lifting and lifting by the agencies, institutions and small car running frame is composed of three parts.
   Lifting bodies, including the motor, brake, reducer, drum and pulley blocks. Motor through reducer, driven rotating drum so that the wire rope around the drum or from the reel down to take-off and landing weights. Small frame is a child care support and installation of lifting mechanism and operation of institutions such as car chassis components, usually welded structure.
     The carts run organizations to adopt the design-driven, respectively, that is active on both sides of the wheels with a motor driver.