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A 3-rrr Mechanism with Linear Motion Expansion Compensation Function

A linear motion and functional technology, applied in the direction of mechanical equipment, transmission devices, belts/chains/gears, etc., can solve problems such as large differences in mechanism forms, complex structures, unsuitable mechanical structures, etc., and achieve simple structure and good carrying capacity , the effect of good isotropic stiffness

Inactive Publication Date: 2011-12-21
WANXIANGQIANCHAO CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned four kinds of linear translation mechanisms can all realize linear translation motion, but the mechanism forms are quite different, and its complex structure is not suitable for mechanical structures that need to do small-scale linear expansion and contraction compensation movements.

Method used

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  • A 3-rrr Mechanism with Linear Motion Expansion Compensation Function
  • A 3-rrr Mechanism with Linear Motion Expansion Compensation Function
  • A 3-rrr Mechanism with Linear Motion Expansion Compensation Function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Figure 4 It is a structural schematic diagram of the 3-RRR mechanism provided by the present invention with the function of linear motion expansion and contraction compensation. This mechanism includes the fixed end 1 of the lower link, the fixed end 5 of the upper link, the first link 2a and the second link 2b of the two links of the first RRR kinematic chain, and the two links of the second RRR kinematic chain. The third connecting rod 3a, the fourth connecting rod 3b and the fifth connecting rod 4a and the sixth connecting rod 4b of the third RRR kinematic chain, the fixed end 1 of the lower connecting rod is connected with the first connecting rod The connecting rod 2a, the third connecting rod 3a, and the fifth connecting rod 4a respectively pass through the first rotating pair A 1 , the second revolving pair A 2 and the third revolving pair A 3 connection; the upper connecting rod fixed end 5 and the second connecting rod 2b, the fourth connecting r...

Embodiment 2

[0110] Embodiment 2: The RRR kinematic chains are 4 in total, and about the intersection line O 1 o 2 It is distributed symmetrically at 90°, which further increases the strength and rigidity of the mechanism, and the rest are the same as in Embodiment 1.

Embodiment 3

[0111] Embodiment 3: There are 6 RRR kinematic chains in total, and about the intersection line O 1 o 2 It is distributed symmetrically at 60°, which further increases the strength and rigidity of the mechanism, and the rest are the same as in Embodiment 1.

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Abstract

The invention relates to a 3-RRR mechanism with linear motion telescopic compensation function. Connecting rods, two connecting rods of the second RRR kinematic chain, the third connecting rod, the fourth connecting rod and the fifth connecting rod and the sixth connecting rod of the third RRR kinematic chain, the first connecting rod The rod, the third connecting rod and the fifth connecting rod have the same length, and the second connecting rod, the fourth connecting rod and the sixth connecting rod have the same length; each RRR kinematic chain determines a motion plane, and the three RRR kinematic chains The three determined planes intersect on the same straight line O1O2 or the intersecting lines formed by each other are parallel to each other. The present invention can be implemented in a multi-link mechanism composed of only rotating pairs and connecting rods, so that one of the components can perform linear expansion and contraction motion with a single degree of freedom.

Description

technical field [0001] The invention relates to a linear guide mechanism, in particular to a 3-RRR mechanism with a linear motion telescopic compensation function. Background technique [0002] Single-degree-of-freedom linear motion mechanisms are widely used in modern machinery. In order to accurately realize linear motion, people invented the crank-slider mechanism, but the motion characteristics of the crank-slider mechanism depend entirely on the slide rail to a certain extent. In order to avoid the influence of linear motion limited by slide rails, mechanism scholars try to synthesize a mechanism that can achieve precise linear motion through traditional connecting rods and rotating pairs. In the history of mechanism science, the representative linear translation mechanism is the Peaucellier-Lipkin mechanism [1.Peaucellier-Lipkin linkage.Wikipedia, the free encyclopdia[EB / OL]http: / / en.wikipedia.org / wiki / Peaucellier%E2 %80%93Lipkin_linkage], Sarrus institution [2.Sarrus...

Claims

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Application Information

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IPC IPC(8): F16H21/50
Inventor 张杰赵景山资小林刘向郭增均冯之敬
Owner WANXIANGQIANCHAO CO LTD
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