CN100462578C

CN100462578C - Conical-axis Hooke's hinge

Info

Publication number: CN100462578C
Application number: CNB2006101460188A
Authority: CN
Inventors: 张秀峰; 孙立宁
Original assignee: Boshi Accurate Test Control Co Ltd Harbin Pllytechnical Univ; Harbin Institute of Technology
Current assignee: Boshi Accurate Test Control Co Ltd Harbin Pllytechnical Univ; Harbin Institute of Technology
Priority date: 2003-04-10
Filing date: 2003-04-10
Publication date: 2009-02-18
Anticipated expiration: 2023-04-10
Also published as: CN100354069C; CN1982733A; CN1572437A

Abstract

A conical Hooke's hinge comprises a cross tail spindle, a ball-bearing without an inner sleeve, a sealed end cover and static and moving hinge bodies. On the static hinge body is opened a hole No.1 and on the moving hinge body is opened a hole No.2. On the internal hole surfaces at the outer ends of No.1 and No.2 holes are opened internal thread and on the sealed end cover are opened external threads. The ball-bearing is set on the cylindrical external surface at the inner ends of No.1 and No.2 holes. Four conical ends of the cross tail spindle are inserted in the internal hole of the ball-bearing and the sealed end cover is screwed in the internal thread.

Description

Conical-axis Hooke's hinge

Technical field:

The present invention relates to be used for the Hooke's hinge of locating platform in parallel.The present invention be to application number be 031114393, name is called dividing an application of " six-degree-of-freedom grand moving precision locating platform in parallel and be used for the conical-axis Hooke's hinge of this platform " patent application.

Background technique:

At present, precise operation develops towards nanoscale day by day, thereby precision positioning mechanism had higher requirement, the stroke space of eager a kind of operation of demand is big, the taller locating platform of while Location accuracy, in China, the Location accuracy of the parallel kinematic platform of tens millimetres of movement strokes can only reach micron order (tens microns to several microns), return its reason, at first as Hooke's hinge (or ball pivot) gap of parallel kinematic platform coupling mechanism and and connecting rod between assemblage gap influenced the raising of precision, the secondly improper stroke that limits locating platform of Hooke's hinge setting angle.

Summary of the invention:

The low defective of Location accuracy for the locating platform in parallel that overcomes prior art provides a kind of conical-axis Hooke's hinge, and the Location accuracy that makes locating platform in parallel is greatly enhanced because of the precision of Hooke's hinge improves.It comprises cross center shaft 10, the ball bearing 9 of cover in not having, end cover 11, quiet hinge bodies 12 and moving hinge bodies 13, cross center shaft 10 is that two two ends are circular cones, formed cross body links together in the middle part of the axle, have No. one hole 12-1 on the quiet hinge bodies 12, have hole 13-1 No. two on the moving hinge bodies 13, have internal thread 14 on the outer end bore area of a hole 12-1 and No. two hole 13-1, have outside thread on the outer round surface of end cover 11, ball bearing 9 is set on the inner end cylinder bore area of a hole 12-1 or No. two hole 13-1, four conical end of cross center shaft 10 are inserted in the endoporus of ball bearing 9, and end cover 11 screws in the internal thread 14 of a hole 12-1 or No. two hole 13-1.By screwing hermetic end cap 11, can reduce the matching gap of cross center shaft 10 and ball bearing 9, improve the rigidity of structure, thereby improve the running accuracy of conical-axis Hooke's hinge of the present invention.Unscrew and unload end cover 11, just can unload lower ball bearing 9 easily and then lay down cross center shaft 10.Used the Location accuracy of the locating platform in parallel of conical-axis Hooke's hinge of the present invention to be greatly enhanced because of the precision of Hooke's hinge improves, while conical-axis Hooke's hinge of the present invention mounts and dismounts all very convenient on locating platform, makes maintenance, safeguards that locating platform in parallel of the present invention is easier to.The displacement repeatability of using the locating platform in parallel of conical-axis Hooke's hinge of the present invention can reach 0.5 μ m, have advantages such as highi degree of accuracy, high rigidity and compact structure, can be widely used in precise operation fields such as micromechanics assembling, optics inching, biological micromanipulator, micro-medical treatment and ultraprecise processing.

Description of drawings:

Fig. 1 is the structural representation of conical-axis Hooke's hinge of the present invention, and Fig. 2 is the structural representation of traditional Hooke's hinge.

Embodiment:

Embodiment one: specify present embodiment below in conjunction with Fig. 1, Fig. 2.Conical-axis Hooke's hinge is by cross center shaft 10, the ball bearing 9 of cover in not having, end cover 11, quiet hinge bodies 12 and moving hinge bodies 13 are formed, cross center shaft 10 is that two two ends are circular cones, formed cross body links together in the middle part of the axle, have No. one hole 12-1 on the quiet hinge bodies 12, have hole 13-1 No. two on the moving hinge bodies 13, have internal thread 14 on the outer end bore area of a hole 12-1 and No. two hole 13-1, have outside thread on the outer round surface of end cover, ball bearing 9 is set on the inner end cylinder bore area of a hole 12-1 or No. two hole 13-1, four conical end of cross center shaft 10 are inserted in the endoporus of ball bearing 9, and end cover 11 screws in the internal thread 14 of a hole 12-1 or No. two hole 13-1.

Embodiment two: specify present embodiment below in conjunction with Fig. 1.The difference of present embodiment and mode of execution one is: the point angle α of cross center shaft 10 is between 55 ° to 75 °.Other composition is identical with mode of execution one with annexation.

Embodiment three: specify present embodiment below in conjunction with Fig. 1.The difference of present embodiment and mode of execution two is: the point angle α of cross center shaft 10 is 60 °.Other composition is identical with mode of execution one with annexation.

Claims

1. conical-axis Hooke's hinge, it comprises quiet hinge bodies (12) and moving hinge bodies (13), it is characterized in that it also comprises cross center shaft (10), the ball bearing (9) and the end cover (11) of cover in not having, cross center shaft (10) is that two two ends are circular cones, the formed cross body of axle that the axle middle part links together, have a hole (12-1) on the quiet hinge bodies (12), have No. two holes (13-1) on the moving hinge bodies (13), have internal thread (14) on the outer end bore area in a hole (12-1) and No. two holes (13-1), have outside thread on the outer round surface of end cover (11), ball bearing (9) is set on the inner end cylinder bore area in a hole (12-1) or No. two holes (13-1), four conical end of cross center shaft (10) are inserted in the endoporus of ball bearing (9), and end cover (11) screws in the internal thread (14) in a hole (12-1) or No. two holes (13-1).

2. conical-axis Hooke's hinge according to claim 1, the point angle (α) that it is characterized in that cross center shaft (10) is between 55 ° to 75 °.

3. conical-axis Hooke's hinge according to claim 1 is characterized in that the point angle (α) of cross center shaft (10) is 60 °.