The ball screw comprises a rod body, a first through hole is formed in the rod body in the axial direction, the first through hole penetrates through the end, used for being connected with a ball cup, of the rod body, the rod body is further provided with a second through hole, and one end of the second through hole penetrates through the end, away from the ball cup, of the first through hole to form a first opening; the other end of the second through hole extends to the surface of the body to form a second opening. When the nut is driven by the motor to drive the rod body to move through the ball, extruded airflow in the shell enters the first through hole from the second opening in the surface of the rod body and flows out of the first opening, or the extruded airflow flows in from the first opening and flows out of the second opening, and compared with a gap between the nut and the roller path, the gap between the nut and the roller path is smaller. The ventilation effect of the first through hole and the second through hole is better, so that airflow circulation in the left cavity and the right cavity is smooth, the stability of the air pressure in the sealing cavity of the shell is facilitated, and the situation that the air pressure difference causes large pressure to the dustproof cover and the clamp is prevented.
本发明公开了转向器及其滚珠丝杆,包括杆体,所述杆体内部沿轴向方向设有第一通孔,所述第一通孔贯穿所述杆体用于与球头座连接的一端,所述杆体还设有第二通孔,所述第二通孔一端贯穿于第一通孔远离球头座的一端形成第一开口,第二通孔另一端延伸至本体表面形成第二开口。当螺母在电机的驱动下通过滚珠带动杆体移动,壳体内受挤压的气流由杆体表面的第二开口进入第一通孔,并由第一开口流出,或者受挤压的气流由第一开口流入,并由第二开口流出,相比于螺母与滚道之间的缝隙,第一通孔和第二通孔的通气效果更佳,使得左右腔体气流流通顺畅,从而有助于壳体密封腔体内部气压的稳定,防止气压差对防尘罩和卡箍造成较大的压力。
Steering gear and ball screw thereof
转向器及其滚珠丝杆
2025-02-25
Patent
Electronic Resource
Chinese
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge |
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