Super large workspace spherical face hinge

Abstract

The invention discloses a spherical hinge which is provided with a large operating space. The spherical hinge is characterized in that a double-lug supporting frame (10) and a lower supporting rod (11) are fixedly connected with a supporting ball socket (1) into a whole, the double-lug supporting frame (10) is rotationally connected with a U-shaped shifting fork (3) through pins (2 and 9), the U-shaped shifting fork (3) is installed at the outer side of the double-lug supporting frame (10), a rotating supporting frame (6), the pins (7 and 7`) on the rotating supporting frame and supporting rollers (8 and 8`) are nested on an output rod (5) together, and the lower end of the output rod (5) is fixed with a ball head (4) centrally and is arranged in the supporting ball socket (1); the U-shaped shifting fork (3) is a semicircular arc cylindrical combined body, pin holes are arranged at both ends of the U-shaped shifting fork, and a radial sealed long groove internally and externally transparent and taking the middle plane of axial width as a symmetrical plane is arranged along the circumferential direction; the output rod (5) penetrates through the sealed long groove and can swing reciprocally in the sealed long groove. The spherical hinge has the advantages that the swinging space of the output rod is large, the structure is simple, and the volume is small, etc. The important basic unit in mechanism, namely the performance of the spherical hinge is changed in the spherical hinge, thereby bringing important influence to the mechanical design in engineering.

Description

technical field [0001] The invention relates to a spherical hinge with a large working space, and belongs to the field of mechanism robots or machinery. Background technique [0002] As a rotatable connection, the spherical hinge usually consists of a ball head connected to an output rod and a ball socket fixedly connected to a support rod. When one end is fixed, the other end has three rotational degrees of freedom. In the field of mechanics and robotics, this rotatable connection is called a spherical pair. Theoretically, these two elements must be in stable and reliable contact. However, in engineering, this kind of spherical pair cannot be separated no matter it is under pressure or tension, so it must be guaranteed in structural design. [0003] At present, there are two types of typical structures of the main and commonly used spherical hinges: the transversely split ball-and-socket type. That is, the transverse section perpendicular to the axis of the support rod ...

AI Technical Summary

Problems solved by technology

[0005] The existing spherical hinges all have a common shortcoming: the swing range of the output rod is small, namely:

[0008] The problem of the small swing range of the output rod of the spherical hinge has not been well solved, and the impact on engineering applications is various. For example, the working space of the parallel machine tool is affected by the spherical hinge to a certain extent. Unable to achieve larger working space requirements; Mechanism and robot mechanism are restricted by spherical hinges, and their actual working space is small; spherical (joint) hinges in humanoid robots have small working space and cannot meet the requirements of limb movement, etc.

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