Four-branch three-freedom-degree redundant drive type parallel machining head

A degree of freedom, four-branch technology, applied in the direction of manufacturing tools, manipulators, program-controlled manipulators, etc., can solve the problems of limited drive load capacity, limited operability, and low overall rigidity, achieving strong modularity and integration. Improve the load condition and the effect of strong bearing capacity

Pending Publication Date: 2019-10-08
CHINA ACAD OF AEROSPACE AERODYNAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the three-degree-of-freedom parallel processing heads currently on the market, when processing large-scale loaded workpieces, the load capacity of the driver is limited, the overall stiffness of the mechanism is low, and the mechanism itself has a singular configuration and occupies a large space, so Its operability is limited, and a four-branch three-degree-of-freedom redundant drive parallel processing head is proposed to improve the overall rigidity of the existing three-degree-of-freedom parallel processing head and reduce its footprint as much as possible to achieve four-branch three-freedom Redundant drives for processing tables

Method used

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  • Four-branch three-freedom-degree redundant drive type parallel machining head
  • Four-branch three-freedom-degree redundant drive type parallel machining head
  • Four-branch three-freedom-degree redundant drive type parallel machining head

Examples

Experimental program
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Effect test

Embodiment 1

[0036] as attached figure 1 , 3 , 4, the program consists of three identical drive branches, a redundant drive branch, frame 16 and processing table 2; the three drive branches are evenly distributed inside the frame 16, and each drive branch is a motor-reducer module 8 through the fifth revolving pair R 5 To drive the turntable one 6, a pair of trunnions are arranged on both sides of the edge of the turntable one 6, which pass through the fourth rotating pair R 4 It is hinged with connecting rod one 5, and the other end of connecting rod one 5 passes through the third rotating pair R 3 It is hinged with hinge seat one 4, and hinge seat one 4 and hinge seat two 3 respectively pass through the first rotating pair R 1 and the second rotating pair R 2 Hinged, the hinge seats 23 of each branch are evenly distributed on one side of the processing table 2; the redundant drive unit 9 mainly includes an electric cylinder body, a telescopic rod 11, and an inner frame 10, and the ou...

Embodiment 2

[0038] as attached figure 2 , 3 , 5, this scheme is made up of three identical drive branches, a redundant drive branch, frame 16 and processing table 2, and each drive branch and redundant drive branch are fixedly connected on the inner side of frame 16 in a center-symmetrical form; each drive branch The connection form is motor-reducer module one 8 through the fifth revolving pair R 5 To drive the turntable one 6, a pair of trunnions are arranged on both sides of the edge of the turntable one 6, which pass through the fourth rotating pair R 4 It is hinged with one end of connecting rod one 5, and the other end of connecting rod one 5 passes through the third rotating pair R 3 It is hinged with hinge seat one 4, and hinge seat one 4 and hinge seat two 3 respectively pass through the first rotating pair R 1 and the second rotating pair R 2 For hinged joints, the hinge seats 2 3 of each branch are evenly distributed on one side of the processing table 2; the redundant driv...

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Abstract

The invention discloses a four-branch three-freedom-degree redundant drive type parallel machining head. The four-branch three-freedom-degree redundant drive type parallel machining head comprises anelectric spindle, a machining table, a frame, three same drive branches and a redundant drive branch. Each drive branch comprises a first motor-speed reducer module, a first rotary disc, a first connecting rod, a first hinge base and a second hinge base, wherein the first motor-speed reducer module rotationally drives the first rotary disc through a fifth revolute pair, a pair of lug shafts are arranged on the two sides of the edge of the first rotary disc, the first rotary disc is hinged to one end of the first connecting rod through a fourth revolute pair, the other end of the first connecting rod is hinged to the first hinge base through a third revolute pair, the first hinge base and the second hinge base are hinged through a first revolute pair and a second revolute pair, and the rotation axes of the first revolute pair, the second revolute pair and the third revolute pair are mutually orthogonal. By means of a redundant drive structural manner, the load status of a driver can beimproved, the bearing capacity is high, and the overloading problem of the driver when large complex workpieces are machined is avoided.

Description

technical field [0001] The invention relates to a four-branch three-degree-of-freedom redundant drive type parallel processing head, which belongs to the field of parallel mechanism science. Background technique [0002] With the continuous development of my country's military industry, more and more large and complex parts need to be processed, which requires processing equipment to have high overall rigidity and processing accuracy at the same time. Processing equipment can be divided into two categories according to the structure type, namely series and parallel. The traditional tandem machine tool has the advantages of small space occupation and large working space, but its rigidity cannot meet the processing requirements of large workpieces; although the parallel machine tool can guarantee the rigidity and accuracy requirements, it occupies a large space and the operating space is relatively large. If it is small, it will cause a waste of resources. Therefore, combini...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25J9/00B25J9/12
CPCB25J9/0048B25J9/12
Inventor 赵星宇魏忠武王帅董金刚谢峰张晨凯
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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