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HZ-12A农用运输车,采用螺杆螺母循环滚珠齿条齿扇式转向器,这种转向器依靠64粒直径7毫米的钢珠,在转向螺杆与螺母齿条间形成的螺旋滚道及导流管中作循环流动,形成滚动摩擦,克服一般螺杆螺母间的自锁作用,具有转向灵活,操纵省力等优点。但由于这种转向器转动频繁,特别在路况较差的道路上行驶时,转向器承受较大的冲击力,再加上润滑不良,易引起磨损,造成螺杆螺母、齿条和齿扇的啮合间隙及转向杆件间活动节点间隙增大,使转向器自由转角
HZ-12A agricultural vehicles, the use of screw and nut recirculating ball rack and pinion-type steering gear, which rely on the steering wheel 64 mm diameter 7 mm ball, the spiral between the steering screw and the nut rack and spiral duct In the circulation flow, the formation of rolling friction, to overcome the general self-locking effect between the screw and nut, with the steering flexibility, the advantages of labor-saving and so on. However, due to the frequent rotation of the steering gear, especially on the roads with poor traffic conditions, the steering gear is subjected to a large impact force, and the poor lubricating property easily causes abrasion and causes the engagement of the screw nut, the rack and the tooth fan Clearance and steering rod activities between the node increases, so that the steering angle of freedom