求翻译：驱动装置是牵引链条的动力装置，有角式传动和直线式传动两种形式。最常用的是直线传动，也称履带式驱动装置。直线式传动具有布置灵活，维修方便等特点。由于在各输送线路和工艺线路上的链速及链条长度各不相同，所以，其功率、结构也不尽相同，但主要都由电机、减速器、驱动链轮、驱动链条、链驱动拨爪、支承滚轮、浮动支架、固定支架、支承块、行程开关及开关拨杆、张紧单元等部分组成。结构见图：是什么意思？

Drive traction chain of the power plant, angle drive and linear drive in two forms. The most commonly used is the linear transmission, also known as the crawler drive unit. The linear drive has a flexible layout, easy to maintain. Chain speed and chain length on the various transmission lines and pr

tow chain drive unit is a corner of the power unit, and straight-line-drive and drive two forms. The most common of which are direct drive, also known as track drive. Straight-line drive has a flexible configuration, and ease of service. Due to the transmission line and process the link as soon as p

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