The invention provides a spherical joint mechanism with a tension locking function. The spherical joint mechanism comprises an upper hemispherical shell, a lower hemispherical shell and a ball head assembly. The upper hemispherical shell is provided with a smooth surface and a resistance increasing surface, a through hole is formed in the middle of the lower hemispherical shell, and the upper hemispherical shell and the lower hemispherical shell are connected through a flange to form a spherical cavity. The ball head assembly is located in the ball cavity and comprises a ball head, a plurality of friction plate assemblies, a friction plate reset assembly, a pull rod assembly, a pull rod reset compression spring and a limiting threaded sleeve, and the pull rod assembly penetrates through a lower end hole of the ball cavity. When the pull rod is not pulled, the friction plate assembly does not make contact with the resistance increasing surface of the upper hemispherical shell, and the spherical joint can freely rotate within three degrees of freedom within a certain range. When the pull rod assembly is pulled, the pull rod assembly slides downwards in the ball head slideway to push the friction plate assembly to be tightly pressed with the upper semispherical shell, the friction resistance moment prevents the ball joint from freely rotating, and locking is achieved. And after the tension applied to the pull rod is unloaded, the spherical joint is driven by the pull rod reset pressure spring and the friction plate reset assembly to recover the free rotation state.
本发明提供一种具有受拉锁紧功能的球形关节机构,包括上、下半球壳和球头组件。上半球壳设有光滑表面和增阻表面,下半球壳中间设有通孔,上、下半球壳通过法兰连接,形成球腔;球头组件位于球腔内,包含球头、多个摩擦片组件及摩擦片复位组件、拉杆组件、拉杆复位压簧、限位螺套,拉杆组件穿过球腔下端孔。拉杆不受拉力时,摩擦片组件与上半球壳增阻表面不接触,球形关节可以在一定范围内3自由度自由转动;拉杆组件受到拉力时,在球头滑道内向下滑动,推动摩擦片组件与上半球壳压紧,摩擦阻力矩阻碍球关节自由转动,实现锁紧;拉杆受拉力卸载后,球形关节在拉杆复位压簧和摩擦片复位组件驱动下恢复自由转动状态。
Spherical joint mechanism with tension locking function
一种具有受拉锁紧功能的球形关节机构
2025-05-09
Patent
Electronic Resource
Chinese
IPC: | B66C Krane , CRANES |