CN105690420A - Joint of parallel spray painting robot - Google Patents

Joint of parallel spray painting robot Download PDF

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Publication number
CN105690420A
CN105690420A CN201610173312.1A CN201610173312A CN105690420A CN 105690420 A CN105690420 A CN 105690420A CN 201610173312 A CN201610173312 A CN 201610173312A CN 105690420 A CN105690420 A CN 105690420A
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CN
China
Prior art keywords
slide block
guide rail
branched chain
revolute pair
rod
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Pending
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CN201610173312.1A
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Chinese (zh)
Inventor
褚宏鹏
孙通帅
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褚宏鹏
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Priority to CN201610173312.1A priority Critical patent/CN105690420A/en
Publication of CN105690420A publication Critical patent/CN105690420A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25JMANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J17/00Joints
    • B25J17/02Wrist joints
    • B25J17/0258Two-dimensional joints

Abstract

A joint of a parallel spray painting robot mainly comprises a fixed platform, a movable platform, an annular guide rail and four motion branch chains connecting the movable platform with the fixed platform. Each motion branch chain is composed of a lower connecting rod, a sliding block and an upper connecting rod. The lower connecting rods are connected with the fixed platform through rotation pairs or spherical pairs. The lower connecting rods and the sliding blocks are connected through rotation pairs or spherical pairs. The sliding blocks and the upper connecting rods are connected through rotation pairs or spherical pairs. The upper connecting rods and the movable platform are connected through rotation pairs or spherical pairs. The sliding blocks in the four motion branch chains are all connected with the annular guide rail through movable pairs. The sliding blocks can only circumferentially slide along the annular guide rail, and the annular guide rail is in a circular ring shape. The movable platform can do two-freedom-degree rotation relative to the fixed platform, and the joint has the beneficial effects of being small in size, large in rigidity, high in precision, large in rotating work space and the like and can be widely applied to the field of robot joints.

Description

Spraying robot person joint in parallel
Technical field
The present invention relates to a kind of joint of robot, particularly to a kind of spraying robot person joint in parallel。
Technical background
Along with the rapid emergence of auto industry, automotive automation spraying technology have also been obtained fast development, and due to the highly flexible feature of spray robot, spray robot is widely applied in automatic spraying field。Current spray robot mostly generally is six degree of freedom serial manipulator, and serial manipulator has bigger work space, but its accumulated error is big, is unfavorable for the raising of deposition accuracies。But the relative serial mechanism of parallel institution has without cumulative error, the advantage such as precision is high, dynamic response is good, can be applicable to high precision manipulation robot。But the work space of parallel institution is general less, seriously constrain the parallel institution application in fields such as industry and robots。
Advantage in conjunction with series and parallel mechanism, hybrid mechanism can be adopted to build the industrial robot that precision is higher, such as Chinese patent CN103433918A discloses a kind of five degree of freedom series-parallel connection industrial robot, regulate end-of-arm tooling position by three one-movement-freedom-degree serial mechanisms, regulate end-of-arm tooling attitude by end two one-rotation parallel mechanism。For such series-parallel connection spray robot, its key technology is in that terminal angle regulates parallel institution, for improving precision and the flexibility ratio thereof of spray robot, it is desirable to terminal angle regulates parallel institution should have less volume and bigger work space and higher rigidity。Common parallel institution is extremely difficult to requirement, and abroad to the research of such mechanism relatively early, wherein US Patent No. 5036724 discloses a kind of big work space two one-rotation parallel mechanism, and is successfully applied in industrial spraying robot carpal joint。Though at present the research of small size, big work space rotation class parallel institution being achieved certain achievement, but new mechanism configuration being still comparatively deficient, and the rigidity of disclosed mechanism is general less, limits the further application in industrial robot of such mechanism。
Summary of the invention
For solving the problems referred to above, the present invention provides a kind of spraying robot person joint in parallel, it may be achieved moving platform does two-freedom relative to fixed platform and rotates, and this joint has the advantages such as volume is little, rigidity big, rotation work space is big, can be widely applied in joint of robot。
Technical scheme is specific as follows:
The invention mainly comprises fixed platform, moving platform, ring-shaped guide rail, connect four movement branched chain dynamic, fixed platform, it has three kinds of connected modes:
The first connected mode: four movement branched chain structures are identical, every movement branched chain forms by lower link, slide block and upper connecting rod, lower link one end is connected by fixed platform revolute pair with fixed platform, the lower link other end is connected by lower revolute pair with slide block, upper connecting rod one end is connected by moving platform revolute pair with moving platform, and the upper connecting rod other end is connected by upper revolute pair with slide block;Article four, in movement branched chain, four fixed platform revolute pair axis and four lower turns auxiliary shaft congruences meet at 1 P, and four moving platform revolute pair axis and four upper turns auxiliary shaft congruences meet at 1 Q, and Q and described some P is misaligned for point;Slide block in every movement branched chain is all connected by moving sets with ring-shaped guide rail, and slide block annularly can only do circumferential slippage by guide rail, and ring-shaped guide rail is annular, and its center axis is crossed described some P and puts Q。
The second connected mode: four movement branched chain structures are identical, every movement branched chain forms by lower link, slide block and upper connecting rod, lower link one end is connected by fixed platform revolute pair with fixed platform, the lower link other end is connected by spherical pair with slide block, upper connecting rod one end is connected by spherical pair with moving platform, and the upper connecting rod other end is connected by upper revolute pair with slide block;Article four, in movement branched chain, four fixed platform turns auxiliary shaft congruences meet at 1 P, and four upper turns auxiliary shaft congruences meet at 1 Q, and Q and described some P is misaligned for point;Slide block in every movement branched chain is all connected by moving sets with ring-shaped guide rail, and slide block annularly can only do circumferential slippage by guide rail, and ring-shaped guide rail is annular, and its center axis is crossed described some P and puts Q。
The third connected mode: four movement branched chain structures are identical, every movement branched chain forms by lower link, slide block and upper connecting rod, lower link one end is connected by spherical pair with fixed platform, the lower link other end is connected by lower revolute pair with slide block, upper connecting rod one end is connected by moving platform revolute pair with moving platform, and the upper connecting rod other end is connected by spherical pair with slide block;Article four, in movement branched chain, four lower turns auxiliary shaft congruences meet at 1 P, and four moving platform turns auxiliary shaft congruences meet at 1 Q, and Q and described some P is misaligned for point;Slide block in every movement branched chain is all connected by moving sets with ring-shaped guide rail, and slide block annularly can only do circumferential slippage by guide rail, and ring-shaped guide rail is annular, and its center axis is crossed described some P and puts Q。
The present invention compared with prior art has the advantage that
(1) moving platform in joint relative fixed platform rotation work space is big, and rotational angle is up to ± 90 degree;(2) arthritic volume is little, and rigidity is big;(3) intercouple between four movement branched chain in joint, substantially increase the stress performance in joint;(4) in the middle part of joint being hollow structure, cable, pipeline etc. can pass in the middle of joint, it is simple to spraying。
Accompanying drawing explanation
Fig. 1 is the embodiment of the present invention 1 stereochemical structure simplified schematic diagram.
Fig. 2 is the embodiment of the present invention 1 deflection state stereochemical structure simplified schematic diagram.
Fig. 3 is the embodiment of the present invention 2 stereochemical structure simplified schematic diagram.
Fig. 4 is the embodiment of the present invention 2 deflection state stereochemical structure simplified schematic diagram.
Fig. 5 is the embodiment of the present invention 3 stereochemical structure simplified schematic diagram.
Fig. 6 is the embodiment of the present invention 3 deflection state stereochemical structure simplified schematic diagram.
In figure: 1. fixed platform, 2. moving platform, (A3, B3, C3, D3). lower link, (A4, B4, C4, D4). slide block, (A5, B5, C5, D5). upper connecting rod, 6. ring-shaped guide rail。
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described, and in all embodiments, described Rij represents a revolute pair, and Sij represents a spherical pair, and Pij represents a moving sets, and wherein i, j are natural number。
Embodiment 1
It is the 1st embodiment disclosed by the invention as shown in Figure 1 and Figure 2, a kind of spraying robot person joint in parallel, mainly include fixed platform 1, moving platform 2, ring-shaped guide rail 6, connect four movement branched chain dynamic, fixed platform。Article four, movement branched chain structure is identical, and wherein the first movement branched chain is made up of lower link A3, slide block A4 and upper connecting rod A5, is connected by revolute pair R11 between lower link A3 one end and fixed platform 1, and the lower link A3 other end is connected by revolute pair R12 with slide block A4;Upper connecting rod A5 one end is connected by revolute pair R13 with slide block A4, is connected by revolute pair R14 between the upper connecting rod A5 other end and moving platform 2。Second movement branched chain is made up of lower link B3, slide block B 4 and upper connecting rod B5, is connected by revolute pair R21 between lower link B3 one end and fixed platform 1, and the lower link B3 other end is connected by revolute pair R22 with slide block B 4;Upper connecting rod B5 one end is connected by revolute pair R23 with slide block B 4, is connected by revolute pair R24 between the upper connecting rod B5 other end and moving platform 2。3rd movement branched chain is made up of lower link C3, slide block C4 and upper connecting rod C5, is connected by revolute pair R31 between lower link C3 one end and fixed platform 1, and the lower link C3 other end is connected by revolute pair R32 with slide block C4;Upper connecting rod C5 one end is connected by revolute pair R33 with slide block C4, is connected by revolute pair R34 between the upper connecting rod C5 other end and moving platform 2。4th movement branched chain is made up of lower link D3, slide block D4 and upper connecting rod D5, is connected by revolute pair R41 between lower link D3 one end and fixed platform 1, and the lower link D3 other end is connected by revolute pair R42 with slide block D4;Upper connecting rod D5 one end is connected by revolute pair R43 with slide block D4, is connected by revolute pair R44 between the upper connecting rod D5 other end and moving platform 2。
In first movement branched chain, slide block A4 is connected by moving sets P15 with ring-shaped guide rail 6, and slide block A4 annularly can only do circumferential slippage by guide rail 6;In second movement branched chain, slide block B 4 is connected by moving sets P25 with ring-shaped guide rail 6, and slide block B 4 annularly can only do circumferential slippage by guide rail 6;In 3rd movement branched chain, slide block C4 is connected by moving sets P35 with ring-shaped guide rail 6, and slide block C4 annularly can only do circumferential slippage by guide rail 6;In 4th movement branched chain, slide block D4 is connected by moving sets P45 with ring-shaped guide rail 6, and slide block D4 annularly can only do circumferential slippage by guide rail 6。
Described revolute pair R11, revolute pair R12, revolute pair R21, revolute pair R22, revolute pair R31, revolute pair R32, revolute pair R41, revolute pair R42 axis intersect at 1 P;Described revolute pair R13, revolute pair R14, revolute pair R23, revolute pair R24, revolute pair R33, revolute pair R34, revolute pair R43, revolute pair R44 axis intersect at 1 Q, Q and described some P is misaligned for point。Described ring-shaped guide rail 6 is annular, and its center axis is crossed described some P and puts Q。
Embodiment 2
It is the 2nd embodiment disclosed by the invention as shown in Figure 3, Figure 4, a kind of spraying robot person joint in parallel, mainly include fixed platform 1, moving platform 2, ring-shaped guide rail 6, connect four movement branched chain dynamic, fixed platform。Article four, movement branched chain structure is identical, and wherein the first movement branched chain is made up of lower link A3, slide block A4 and upper connecting rod A5, is connected by revolute pair R11 between lower link A3 one end and fixed platform 1, and the lower link A3 other end is connected by spherical pair S12 with slide block A4;Upper connecting rod A5 one end is connected by revolute pair R13 with slide block A4, is connected by spherical pair S14 between the upper connecting rod A5 other end and moving platform 2。Second movement branched chain is made up of lower link B3, slide block B 4 and upper connecting rod B5, is connected by revolute pair R21 between lower link B3 one end and fixed platform 1, and the lower link B3 other end is connected by spherical pair S22 with slide block B 4;Upper connecting rod B5 one end is connected by revolute pair R23 with slide block B 4, is connected by spherical pair S24 between the upper connecting rod B5 other end and moving platform 2。3rd movement branched chain is made up of lower link C3, slide block C4 and upper connecting rod C5, is connected by revolute pair R31 between lower link C3 one end and fixed platform 1, and the lower link C3 other end is connected by spherical pair S32 with slide block C4;Upper connecting rod C5 one end is connected by revolute pair R33 with slide block C4, is connected by spherical pair S34 between the upper connecting rod C5 other end and moving platform 2。4th movement branched chain is made up of lower link D3, slide block D4 and upper connecting rod D5, is connected by revolute pair R41 between lower link D3 one end and fixed platform 1, and the lower link D3 other end is connected by spherical pair S42 with slide block D4;Upper connecting rod D5 one end is connected by revolute pair R43 with slide block D4, is connected by spherical pair S44 between the upper connecting rod D5 other end and moving platform 2。
In first movement branched chain, slide block A4 is connected by moving sets P15 with ring-shaped guide rail 6, and slide block A4 annularly can only do circumferential slippage by guide rail 6;In second movement branched chain, slide block B 4 is connected by moving sets P25 with ring-shaped guide rail 6, and slide block B 4 annularly can only do circumferential slippage by guide rail 6;In 3rd movement branched chain, slide block C4 is connected by moving sets P35 with ring-shaped guide rail 6, and slide block C4 annularly can only do circumferential slippage by guide rail 6;In 4th movement branched chain, slide block D4 is connected by moving sets P45 with ring-shaped guide rail 6, and slide block D4 annularly can only do circumferential slippage by guide rail 6。
Described revolute pair R11, revolute pair R21, revolute pair R31, revolute pair R41 axis intersect at 1 P;Described revolute pair R13, revolute pair R23, revolute pair R33, revolute pair R43 axis intersect at 1 Q, a Q and described P is misaligned for point。Described ring-shaped guide rail 6 is annular, and its center axis is crossed described some P and puts Q。
Embodiment 3
It is the 3rd embodiment disclosed by the invention as shown in Figure 5, Figure 6, a kind of spraying robot person joint in parallel, mainly include fixed platform 1, moving platform 2, ring-shaped guide rail 6, connect four movement branched chain dynamic, fixed platform。Article four, movement branched chain structure is identical, and wherein the first movement branched chain is made up of lower link A3, slide block A4 and upper connecting rod A5, is connected by spherical pair S11 between lower link A3 one end and fixed platform 1, and the lower link A3 other end is connected by revolute pair R12 with slide block A4;Upper connecting rod A5 one end is connected by spherical pair S13 with slide block A4, is connected by revolute pair R14 between the upper connecting rod A5 other end and moving platform 2。Second movement branched chain is made up of lower link B3, slide block B 4 and upper connecting rod B5, is connected by spherical pair S21 between lower link B3 one end and fixed platform 1, and the lower link B3 other end is connected by revolute pair R22 with slide block B 4;Upper connecting rod B5 one end is connected by spherical pair S23 with slide block B 4, is connected by revolute pair R24 between the upper connecting rod B5 other end and moving platform 2。3rd movement branched chain is made up of lower link C3, slide block C4 and upper connecting rod C5, is connected by spherical pair S31 between lower link C3 one end and fixed platform 1, and the lower link C3 other end is connected by revolute pair R32 with slide block C4;Upper connecting rod C5 one end is connected by spherical pair S33 with slide block C4, is connected by revolute pair R34 between the upper connecting rod C5 other end and moving platform 2。4th movement branched chain is made up of lower link D3, slide block D4 and upper connecting rod D5, is connected by spherical pair S41 between lower link D3 one end and fixed platform 1, and the lower link D3 other end is connected by revolute pair R42 with slide block D4;Upper connecting rod D5 one end is connected by spherical pair S43 with slide block D4, is connected by revolute pair R44 between the upper connecting rod D5 other end and moving platform 2。
In first movement branched chain, slide block A4 is connected by moving sets P15 with ring-shaped guide rail 6, and slide block A4 annularly can only do circumferential slippage by guide rail 6;In second movement branched chain, slide block B 4 is connected by moving sets P25 with ring-shaped guide rail 6, and slide block B 4 annularly can only do circumferential slippage by guide rail 6;In 3rd movement branched chain, slide block C4 is connected by moving sets P35 with ring-shaped guide rail 6, and slide block C4 annularly can only do circumferential slippage by guide rail 6;In 4th movement branched chain, slide block D4 is connected by moving sets P45 with ring-shaped guide rail 6, and slide block D4 annularly can only do circumferential slippage by guide rail 6。
Described revolute pair R12, revolute pair R22, revolute pair R32, revolute pair R42 axis intersect at 1 P;Described revolute pair R14, revolute pair R24, revolute pair R34, revolute pair R44 axis intersect at 1 Q, a Q and described P is misaligned for point。Described ring-shaped guide rail 6 is annular, and its center axis is crossed described some P and puts Q。

Claims (3)

1. a spraying robot person joint in parallel, it has fixed platform, moving platform, ring-shaped guide rail, connect four movement branched chain dynamic, fixed platform, it is characterized in that: four movement branched chain structures are identical, every movement branched chain forms by lower link, slide block and upper connecting rod, lower link one end is connected by fixed platform revolute pair with fixed platform, the lower link other end is connected by lower revolute pair with slide block, upper connecting rod one end is connected by moving platform revolute pair with moving platform, and the upper connecting rod other end is connected by upper revolute pair with slide block;Article four, in movement branched chain, four fixed platform revolute pair axis and four lower turns auxiliary shaft congruences meet at 1 P, and four moving platform revolute pair axis and four upper turns auxiliary shaft congruences meet at 1 Q, and Q and described some P is misaligned for point;Slide block in every movement branched chain is all connected by moving sets with ring-shaped guide rail, and slide block annularly can only do circumferential slippage by guide rail, and ring-shaped guide rail is annular, and its center axis is crossed described some P and puts Q。
2. a spraying robot person joint in parallel, it has fixed platform, moving platform, ring-shaped guide rail, connect four movement branched chain dynamic, fixed platform, it is characterized in that: four movement branched chain structures are identical, every movement branched chain forms by lower link, slide block and upper connecting rod, and lower link one end is connected by fixed platform revolute pair with fixed platform, and the lower link other end is connected by spherical pair with slide block, upper connecting rod one end is connected by spherical pair with moving platform, and the upper connecting rod other end is connected by upper revolute pair with slide block;Article four, in movement branched chain, four fixed platform turns auxiliary shaft congruences meet at 1 P, and four upper turns auxiliary shaft congruences meet at 1 Q, and Q and described some P is misaligned for point;Slide block in every movement branched chain is all connected by moving sets with ring-shaped guide rail, and slide block annularly can only do circumferential slippage by guide rail, and ring-shaped guide rail is annular, and its center axis is crossed described some P and puts Q。
3. a spraying robot person joint in parallel, it has fixed platform, moving platform, ring-shaped guide rail, connect four movement branched chain dynamic, fixed platform, it is characterized in that: four movement branched chain structures are identical, every movement branched chain forms by lower link, slide block and upper connecting rod, and lower link one end is connected by spherical pair with fixed platform, and the lower link other end is connected by lower revolute pair with slide block, upper connecting rod one end is connected by moving platform revolute pair with moving platform, and the upper connecting rod other end is connected by spherical pair with slide block;Article four, in movement branched chain, four lower turns auxiliary shaft congruences meet at 1 P, and four moving platform turns auxiliary shaft congruences meet at 1 Q, and Q and described some P is misaligned for point;Slide block in every movement branched chain is all connected by moving sets with ring-shaped guide rail, and slide block annularly can only do circumferential slippage by guide rail, and ring-shaped guide rail is annular, and its center axis is crossed described some P and puts Q。
CN201610173312.1A 2016-03-24 2016-03-24 Joint of parallel spray painting robot Pending CN105690420A (en)

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