The invention discloses an electric power steering device of a commercial vehicle. A circulating ball mechanism comprises a screw rod and a nut, the screw rod is in shaft connection with an input structure, the nut sleeves the screw rod, and the nut is in meshed connection with a rocker arm mechanism so as to drive the rocker arm mechanism to swing and output torque; the circulating ball mechanism further comprises a steel ball, a first guide pipe and a second guide pipe, wherein the first guide pipe and the second guide pipe are arranged side by side, and a first raceway is formed between a nut internal thread and a screw external thread; the first guide pipe and the second guide pipe are fixedly arranged on the outer side of the nut, second raceways are arranged in the first guide pipe and the second guide pipe, the head and the tail of the second raceway in the first guide pipe are communicated with the first section of the first raceway, the head and the tail of the second raceway in the second guide pipe are communicated with the second section of the first raceway, and the steel ball can roll in the first raceway and the second raceways; and the number of effective rolling turns of the steel ball in the first section and the second section is 2.5. The device can output large torque, and the power steering requirement of a commercial vehicle is effectively met.
本发明公开一种商用车电动助力转向装置,包括:循环球机构包括螺杆和螺母,螺杆与输入结构轴连接,螺母套设在螺杆,螺母与摇臂机构啮合连接,以带动摇臂机构摆动并输出扭矩;循环球机构还包括钢球以及两个并列设置的第一导管、第二导管,螺母内螺纹和螺杆外螺纹之间形成第一滚道;第一导管和第二导管固设在螺母的外侧,第一导管和第二导管内设置有第二滚道,第一导管内的第二滚道的首尾与第一滚道的第一段相连通,第二导管内的第二滚道的首尾与第一滚道的第二段相连通,钢球可在第一滚道和第二滚道内滚动;第一段和第二段内的钢球滚动的有效圈数均为2.5圈。该装置能够输出大扭矩,有效的满足商用车的动力转向需求。
Electric power steering device of commercial vehicle
一种商用车电动助力转向装置
2021-09-28
Patent
Electronic Resource
Chinese
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge |
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