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CAC-shaft composite hinge

A hinge and ball hinge technology, used in pivot connection, metal processing, metal processing equipment, etc., can solve the problems of large volume, unsuitability, small angle range, etc., to achieve high rigidity, easy lubrication, and simple hinge structure.

Inactive Publication Date: 2012-06-20
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Whether it is the AB-axis Hooke hinge or the ABC-axis spherical hinge, its volume is large and the range of rotation angles is small, so it is not suitable for devices that require a wide range of rotation angle movements.

Method used

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  • CAC-shaft composite hinge
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  • CAC-shaft composite hinge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Fig. 1(a) and Fig. 1(b) are a front sectional view and a top sectional view of a CAC composite ball hinge, respectively. The left baffle plate 1, the left short shaft 2, and the left thrust ball bearing 31 form the left C-axis rotation unit; the support 4, the bearing end cover 5, the middle short shaft 6 and the deep groove ball bearing 7 form the A-axis rotation unit. Unit; the right baffle plate 8, the right short shaft 9 and the right side thrust ball bearing 32 form the right side C-axis rotation unit. The two sets of C-axis rotating units connect the hinges to the dynamic / static platform and the branch chain through the left baffle plate 1 and the right baffle plate 8 at both ends respectively, fix the dynamic / static platform and the branch chain with screws, and lock them with round nuts.

[0020] When the left thrust ball bearing 31 and the right thrust ball bearing 32 are not locked, the compound hinge is a ball hinge, which can realize three degrees of freedom...

Embodiment 2

[0022] Fig. 2(a) and Fig. 2(b) are the front sectional view and top sectional view of a CA composite Hookee hinge, respectively. Compared with Embodiment 1, in this embodiment, the C-axis rotation unit on either side is replaced by a non-rotatable fixed baffle 10, so that the composite hinge loses one degree of freedom. At this time, the A-axis rotating unit composed of deep groove ball bearings 7 in the middle and another set of movable C-axis rotating units realize the functions of rotating around the A-axis and C-axis respectively, and finally realize the CA-axis Hooke The movement function of the hinge.

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Abstract

The invention belongs to the technical field of machinery, in particular to a CAC-shaft composite hinge of a reconfigurable parallel machine tool. The hinge structure can not only realize the ball hinge function through the composite rotation of three shafts CAC, but also realize the hooke hinge function through the composite rotation of shafts CA. The composite hinge comprises two groups of shaft C rotating units and a group of shaft A rotating unit, wherein the two groups of shaft C rotating units are connected by the shaft A rotating unit, and the shaft C rotating units respectively realize rotation through a group of thrust ball bearings; and the shaft A rotating unit realizes rotation through deep groove ball bearings. When the two groups of shaft C rotating units are in an active state, the shaft A rotating unit and one group of shaft C rotating unit compositely rotate around a shaft A and a shaft B, and the other group of shaft C rotating unit rotates around a shaft C so as to realize the function of the ball hinge rotating around the shaft A, the shaft B and the shaft C. When one group of C shaft rotating unit is locked, the CAC-shaft composite hinge is changed into a CA-shaft hooke hinge.

Description

technical field [0001] The invention belongs to the technical field of machinery, and in particular relates to a reconfigurable, composite and high-rigidity CAC-axis composite hinge for a reconfigurable parallel machine tool. Background technique [0002] The parallel mechanism has the characteristics of high stiffness, high load capacity, high dynamic performance, high speed, and compact structure. It can be widely used in flight simulators, assembly operations, machining, medical rehabilitation and other fields, and has become a research topic that has attracted much attention internationally. one of the fields. However, due to factors such as hinge constraints, rod length constraints, branch chain interference, and singular configurations, its effective working space is greatly limited, and the movable platform has little room for movement, and it is not as flexible as the hand of a serial robot. Therefore, when the size parameters of the robot are determined, the hinge ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C11/06B23Q37/00
Inventor 唐晓强李铁民李剑邵珠峰姚蕊赵海平柴晓明
Owner TSINGHUA UNIV
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