The invention discloses a linear actuator and a shifter. The linear actuator comprises a motor; a transmission wheel; a screw rod; a tubular telescopic member; wherein the transmission wheel comprises a transmission hole, the lead screw comprises a transmission section, the transmission section is meshed in the transmission hole, and the transmission section and the transmission hole are kept to rotate synchronously in the circumferential direction and can move relatively in the axial direction, so that the lead screw can move in the extending direction of the tubular telescopic component when subjected to axial tension load, and the transmission section and the transmission hole are separated in the axial direction; power transmission between the transmission wheel and the lead screw is cut off; and the elastic component acts on the lead screw to keep the stress state of the lead screw in the retraction direction of the tubular telescopic component. The lead screw is arranged to be of a structure capable of moving in the axial direction of the transmission wheel, so that in the retraction process of the tubular telescopic component, if the tubular telescopic component encounters obstacles, the tubular telescopic component drives the lead screw to move towards the side away from the transmission wheel along the central shaft, so that the transmission section is not engaged with the transmission hole any more, and the transmission wheel is driven by the motor to idle; and the damage of the linear actuator caused by the obstacle is avoided.
本发明公开了线性致动器及移位器,包括:电机;传动轮;丝杆;管状伸缩部件;其中,传动轮包括传动孔,丝杆包括传动段,传动段啮合于传动孔中并保持二者周向同步旋转且能轴向相对移动,以允许丝杆在受到轴向拉力负载时能向着管状伸缩部件伸出方向移动而使传动段和传动孔轴向分离,切断传动轮与丝杆的动力传递;弹性部件,作用于丝杆上保持其向着管状伸缩部件缩回方向的受力状态。本发明通过将丝杆设置成可沿传动轮的轴向移动的结构,使得在管状伸缩部件缩回的过程中,若遇到障碍物阻碍,管状伸缩部件带动丝杆沿中心轴向远离传动轮的一侧移动,以使传动段与传动孔不再啮合,传动轮在电机的驱动下空转,避免障碍物造成线性致动器的损坏。
Linear actuator and shifter
线性致动器及移位器
06.09.2024
Patent
Elektronische Ressource
Chinesisch
IPC: | H02K Dynamoelektrische Maschinen , DYNAMO-ELECTRIC MACHINES / F16H Getriebe , GEARING / B66C Krane , CRANES / A61G TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS , Transport, persönliche Beförderungsmittel, oder Lagerung besonders ausgebildet für Kranke oder Behinderte |
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