The invention belongs to the technical field of lead screw transmission, and discloses a nut-screw transmission device and a car lifting jack. The nut-screw transmission device comprises a nut connecting seat, a lead screw and a working nut; the nut connecting seat is provided with connecting points, and each connecting point is connected with a bracket of the car lifting jack; the lead screw movably penetrates through the nut connecting seat; the working nut is connected with the nut connecting seat, and a first connecting position and a second connecting position are formed. the working nut and the nut connecting seat form a spherical pair or a cylindrical pair at the first connecting position; and the nut connecting seat limits the circumferential rotation of the working nut at the second connecting position; the working nut is in threaded connection with the lead screw; the resultant moment of the force of the bracket acting on each connecting point on a first point is zero, wherein the first point is the sphere center of the spherical pair or is located on the axis of the cylindrical pair; and the spherical pair or the cylindrical pair can eliminate unbalance loading torque on the nut connecting seat, so that the unbalance loading torque cannot be applied to the working nut, the working nut cannot deflect relative to the lead screw, and abrasion of the working nut is reduced.
本发明属于丝杠传动技术领域,公开了一种螺母螺杆传动装置及架车机。螺母螺杆传动装置包括螺母连接座、丝杠和工作螺母。其中,螺母连接座上设有连接点,各连接点均与架车机的托架相连。丝杠活动贯穿于螺母连接座。工作螺母与螺母连接座相连,并形成第一相接处和第二相接处。工作螺母和螺母连接座在第一相接处形成球面副或圆柱副。螺母连接座在第二相接处限制工作螺母的周向转动。工作螺母与丝杠螺纹连接。托架作用在各连接点上的力在第一点上的合力矩为零,第一点为球面副的球心或位于圆柱副的轴线上。球面副或圆柱副能够消除螺母连接座上的偏载扭矩,使其不会施加在工作螺母上,工作螺母相对于丝杠不会偏转,减轻了工作螺母的磨损。
Nut-screw transmission device and car lifting jack
一种螺母螺杆传动装置及架车机
01.02.2022
Patent
Elektronische Ressource
Chinesisch
IPC: | B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last |
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