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Accurate straight-line motion mechanism only including revolute pair

A technology of linear motion and rotating pair, applied in the directions of manipulators, manufacturing tools, joints, etc., can solve the problems of large range of motion, difficult manufacturing, heavy weight, etc., and achieve the effect of large range of motion, low cost and light weight

Active Publication Date: 2011-08-17
SHANDONG WEIGAO SURGICAL ROBOT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the existing disadvantages of using a moving pair to realize linear motion such as manufacturing difficulties and heavy weight, and to provide a precise linear motion mechanism with small volume, large range of motion, and high precision that only includes a rotating pair

Method used

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  • Accurate straight-line motion mechanism only including revolute pair
  • Accurate straight-line motion mechanism only including revolute pair
  • Accurate straight-line motion mechanism only including revolute pair

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Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with specific embodiments.

[0016] As shown in the accompanying drawings, the precise linear motion mechanism of the present invention that only contains rotating pairs, it includes a drive branch chain composed of a fixed platform 1, a drive rocker 3, a connecting rod 4, and a mobile platform 2, and the drive rocker One end of 3 is rotationally connected with the side wall of the fixed platform through a rotating pair, and the other end of the driving rocker 3 is rotationally connected with one end of the connecting rod 4 through a rotating pair, and the other end of the connecting rod 4 is connected with the mobile platform through a rotating pair The side walls of the drive chain are connected in rotation, and the axes of the rotation pairs of the drive branch chain are arranged parallel to each other; the restraint link 5 and the fixed platform 1 and the mobile platform 2 constitute a restraint b...

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Abstract

The invention discloses an accurate straight-line motion mechanism only including a revolute pair. The mechanism comprises a driving branched chain and a constraint branched chain, wherein the driving branched chain consists of a fixed platform, a driving rocking rod, a connecting rod and a moving platform; one end of the driving rocking rod is connected with the fixed platform rotatably; the other end of the driving rocking rod is connected with one end of the connecting rod rotatably; the other end of the connecting rod is connected with the moving platform rotationally; axes of revolute pairs of the driving branched chain are parallel to one another; the constraint branched chain consists of at least two constraint connecting rods, the fixed platform and the moving platform; the at least two constraint connecting rods are arranged between the fixed platform and the moving platform; the adjacent constraint connecting rods are connected rotationally by the revolute pair; the lower end of the constraint connecting rod at the bottommost part is connected with a top surface of the fixed platform rotationally by the revolute pair; the upper end of the constraint connecting rod at the topmost part is connected with a bottom surface of the moving platform rotationally by the revolute pair; and the axes of the revolute pairs of the constraint branched chain are parallel to one another. The mechanism is large in motion range, higher in motion accuracy and smaller in volume.

Description

technical field [0001] The invention relates to a linear motion mechanism comprising only a connecting rod and a rotary pair, which can be used as a linear motion joint of a mechanical arm or an operator. Background technique [0002] Linear motion mechanisms are widely used in manufacturing equipment, robots, internal combustion engines and other fields. However, most of the existing means to achieve linear motion rely on the constraints of moving pairs, such as slider crank mechanism, cam mechanism, screw mechanism, rack and pinion mechanism, etc. The disadvantage of this method is that the manufacturing is complicated and the cost is high. Although there are also some linear motion mechanisms that rely on connecting rods and rotary joints, most of them are approximate linear motion mechanisms, such as Watt's approximate linear motion mechanisms. Also higher. Although it is also possible to use the accurate linear motion mechanism realized by the connecting rod and the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25J17/00
Inventor 王树新李建民戴建生魏国武张国凯
Owner SHANDONG WEIGAO SURGICAL ROBOT CO LTD
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