Multi-point hoisting device for coating large workpieces

Abstract

The utility model discloses a multi-point hoisting device for coating a large workpiece. The multi-point hoisting device comprises a control box, a sky rail vehicle, two outer side suspension mechanisms and two inner side suspension mechanisms, according to the multi-point hoisting device for coating the large workpieces, the sky rail vehicle is used for driving the two outer side suspension mechanisms and the two inner side suspension mechanisms to transversely move, the workpieces can be transported, the outer side suspension mechanisms and the inner side suspension mechanisms are both movably installed on the two supporting longitudinal beams, small-range adjustment of suspension points can be achieved, and the multi-point hoisting device for coating the large workpieces is convenient to use. The two outer side suspension mechanisms and the two inner side suspension mechanisms are driven and controlled by the controller, adaptive adjustment can be conducted according to the shape of a workpiece, multi-point suspension is conducted on the workpiece, shaking is reduced, and the moving stability of the workpiece is improved. The four walking branches are used for supporting the two supporting cross beams and the two supporting longitudinal beams, so that the weight of a workpiece is dispersed on the four walking branches, the pressure intensity on a moving track is reduced, and the moving stability of the sky rail vehicle is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hoisting device, especially a multi-point hoisting device for large workpiece coating. BACKGROUND

[0002] Coating refers to covering a protective layer or a decorative layer on the surface of metal and non-metal. With the development of industrial technology, coating has developed from manual work to industrial automation, and the degree of automation is getting higher and higher, so the application of coating production line is also more and more widely, and it is deeply involved in many fields of national economy. The existing coating line transportation method usually adopts suspension transportation method, but the existing suspension transportation device is difficult to suspend and transport large workpieces, and single-point suspension is unreliable for large workpieces. The workpiece is prone to shaking or rotating during movement, and the transportation device is also prone to shaking due to the shift of the center of gravity of the workpiece, which affects the coating effect. UTILITY MODEL CONTENT

[0003] The utility model provides a multi-point hoisting device for large workpiece coating, which can hoist large workpieces in multiple points and improve the movement stability of the workpiece and the hoisting device itself.

[0004] Technical scheme: the utility model provides a multi-point hoisting device for large workpiece coating, which comprises a control box, a sky rail car, two outer suspension mechanisms and two inner suspension mechanisms; the sky rail car comprises two moving rails, two supporting cross beams, two supporting longitudinal beams and four walking branches; the two moving rails are horizontally arranged; the four walking branches are arranged in two groups respectively and walk on the two moving rails; the two supporting cross beams are horizontally installed on the two groups of walking branches respectively; the two supporting longitudinal beams are longitudinally connected to the two supporting cross beams; the two outer suspension mechanisms are longitudinally movably installed on the two supporting longitudinal beams respectively; the two inner suspension mechanisms are longitudinally movably installed on the two supporting longitudinal beams; the outer suspension mechanism and the inner suspension mechanism are used for providing a longitudinally adjustable suspension point and a horizontally adjustable suspension point for the workpiece respectively; a controller and a wireless communication module electrically connected with the controller are installed in the control box; the walking branch, the outer suspension mechanism and the inner suspension mechanism are driven and controlled by the controller.

[0005] Further, the walking branch comprises a walking shell, a walking drive motor and two walking shafts; the two walking shafts are rotatably longitudinally installed on the walking shell; two moving rollers walking on the moving rails are installed on the two walking shafts; a walking rack is arranged along the length direction on the moving rail; a walking gear meshing with the walking rack is installed on the two walking shafts; the walking drive motor is used for driving one of the walking shafts to rotate, and is electrically connected with the controller through a walking drive circuit.

[0006] Further, the walking shell is rotatably longitudinally mounted with a swing shaft; the support beam is mounted on the two swing shafts on the same set of walking branches through two swing seats; the swing plate is fixed on the swing shaft in the corresponding walking shell; the distance measuring sensor for detecting the corresponding swing plate is mounted in the walking shell, and the distance measuring sensor is electrically connected with the controller; the audible and visual alarm electrically connected with the controller is arranged on the control box.

[0007] Further, the outer suspension mechanism comprises an outer moving seat and an outer longitudinal moving screw; the outer moving seats of the two outer suspension mechanisms are respectively longitudinally slidably mounted on the far sides of the two support longitudinal beams; the outer longitudinal moving screw is rotatably longitudinally mounted on the support longitudinal beam for driving the outer moving seat to longitudinally move; the first longitudinal moving drive motor electrically connected with the controller through the first longitudinal moving drive circuit and the second longitudinal moving drive motor electrically connected with the controller through the second longitudinal moving drive circuit are respectively mounted on the two support longitudinal beams; the first longitudinal moving drive motor and the second longitudinal moving drive motor are respectively used for driving the outer longitudinal moving screw of the two outer suspension mechanisms to rotate; the outer lifting lug for suspending the workpiece is arranged on the outer moving seat.

[0008] Further, the inner suspension mechanism comprises an inner longitudinal moving branch and an inner transverse moving branch; the inner longitudinal moving branch comprises a longitudinal moving beam, a synchronous drive shaft, two inner longitudinal moving screws and two inner moving seats; the two inner moving seats are respectively longitudinally slidably mounted on the two support longitudinal beams; the two inner longitudinal moving screws are respectively rotatably mounted on the two support longitudinal beams for respectively driving the two inner moving seats to longitudinally move; the inner fixed seat is arranged on each of the two inner moving seats; the longitudinal moving beam is connected to the two inner fixed seats; the synchronous drive shaft is rotatably transversely mounted on the two support longitudinal beams and synchronously drives the two inner longitudinal moving screws to rotate through the two bevel gear pairs; the third longitudinal moving drive motor electrically connected with the controller through the third longitudinal moving drive circuit and the fourth longitudinal moving drive motor electrically connected with the controller through the fourth longitudinal moving drive circuit are respectively mounted on the two support longitudinal beams; the third longitudinal moving drive motor and the fourth longitudinal moving drive motor are respectively used for driving the synchronous drive shaft of the two inner suspension mechanisms to rotate; the inner transverse moving branch is mounted on the longitudinal moving beam for transversely adjusting the horizontally adjustable suspension point and is driven and controlled by the controller.

[0009] Further, the inner side transverse moving branch comprises a transverse moving seat and a transverse moving drive screw rod; the transverse moving seat is transversely slidably installed on the longitudinal moving cross beam; the transverse moving drive screw rod is rotatably installed on the longitudinal moving cross beam and is used for driving the transverse moving seat to move transversely; the first transverse moving drive motor electrically connected with the controller through the first transverse moving drive circuit and the second transverse moving drive motor electrically connected with the controller through the second transverse moving drive circuit are respectively installed on the longitudinal moving cross beam of the two inner side suspension mechanisms; the first transverse moving drive motor and the second transverse moving drive motor respectively drive the transverse moving drive screw rods of the two inner side suspension mechanisms to rotate through the transverse gear pair; the inner side lifting lug for suspending the workpiece is fixed on the transverse moving seat.

[0010] Compared with the prior art, the utility model has the advantages that: the two outer side suspension mechanisms and the two inner side suspension mechanisms are driven to move transversely by the overhead rail vehicle, the transport of the workpiece can be realized, the outer side suspension mechanisms and the inner side suspension mechanisms are evenly movably installed on the two support longitudinal beams, the small-range adjustment of the suspension points can be realized, the two outer side suspension mechanisms and the two inner side suspension mechanisms are respectively driven and controlled by the controller, adaptive adjustment can be realized according to the shape of the workpiece, the workpiece is suspended at multiple points, the shaking is reduced, and the moving stability of the workpiece is improved; the two support cross beams and the two support longitudinal beams are supported by the four walking branches, the weight of the workpiece is dispersed on the four walking branches, the pressure on the moving track is reduced, and the stability of the overhead rail vehicle is improved; the wireless communication module facilitates the wireless communication between the controller and the remote control center, and the control signal sent by the remote control center is received. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the top view of the utility model;

[0012] Figure 2 It is the front view of the utility model;

[0013] Figure 3 It is the left view of the support longitudinal beam of the utility model;

[0014] Figure 4 It is the structure schematic view of the walking branch of the utility model;

[0015] Figure 5 It is the sectional view of the walking branch of the utility model;

[0016] Figure 6 It is the partial sectional view of the utility model;

[0017] Figure 7 It is the circuit structure schematic view of the utility model;

[0018] In the figure: 1, moving track; 2, track limiting groove; 3, walking limiting roller; 4, extension rod; 5, walking rack; 6, walking gear; 7, walking rotating shaft; 8, moving roller; 9, walking drive motor; 10, walking shell; 11, swing seat; 12, swing rotating shaft; 13, swing plate; 14, distance measuring sensor; 15, control box; 16, audible and visual alarm; 17, support cross beam; 18, support longitudinal beam; 19, longitudinal moving cross beam; 20, outer moving seat; 21, outer T-shaped groove; 23, outer limiting roller; 24, outer longitudinal moving screw; 25, inner lifting lug; 26, inner longitudinal moving screw; 27, inner moving seat; 28, inner fixed seat; 29, inner limiting roller; 30, inner T-shaped groove; 31, synchronous drive shaft; 32, transverse moving seat; 33, transverse moving limiting roller; 34, transverse moving drive screw; 35, long hole; 36, outer lifting lug. DETAILED DESCRIPTION

[0019] The technical scheme of the utility model will be described in detail below with reference to the drawings, but the protection scope of the utility model is not limited to the embodiments.

[0020] In the utility model, unless another explicit provision and limitation, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood broadly, for example, can be fixed connection, can be detachable connection, or integrated, can be directly connected, can be indirectly connected through intermediate medium, can be the communication of two elements or the interaction of two elements. For ordinary skilled in the art, the above-mentioned terms can be understood according to the specific meaning of the utility model.

[0021] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "left", "right", "front", "back", "up", "down", "top" and "bottom" are all based on the orientation or position relationship shown in the drawings, and are only for the convenience of the simplified description of the utility model, and are not indicative or implicit of the device or element indicated must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as a limitation of the utility model.

[0022] Example 1:

[0023] As Figures 1-7The utility model provides a kind of for large workpiece coating's multipoint hoist device shown, it includes: control box 15, overhead line car, two outer side suspension mechanism and two inner side suspension mechanism;Overhead line car includes two moving tracks 1, two support cross beams 17, two support longitudinal beams 18 and four walking branches;Two moving tracks 1 are laterally arranged at the same height position, and mutually parallel;Four walking branches are in two groups, and two groups of walking branches are respectively walked on two moving tracks 1;Two support cross beams 17 are respectively laterally installed on two groups of walking branches;Two support longitudinal beams 18 are longitudinally connected and fixed on the two ends of two support cross beams 17;Two outer side suspension mechanisms are respectively longitudinally movably installed on the far side of two support longitudinal beams 18;The two ends of inner side suspension mechanism are respectively longitudinally movably installed on the opposite side of two support longitudinal beams 18, and two inner side suspension mechanisms are respectively located on the front and rear sides of support longitudinal beam 18;Outer side suspension mechanism and inner side suspension mechanism are respectively used to provide longitudinally adjustable suspension point and horizontally adjustable suspension point for workpiece;Control box 15 is installed on one support cross beam 17;Controller and wireless communication module electrically connected with controller are installed in control box 15;Four walking branches are synchronously controlled by controller;Two outer side suspension mechanisms and two inner side suspension mechanisms are respectively driven and controlled by controller.

[0024] Utilize overhead line car to drive two outer side suspension mechanisms and two inner side suspension mechanisms to move laterally, can realize the transport of workpiece, outer side suspension mechanism and inner side suspension mechanism are movably installed on two support longitudinal beams 18, can realize small range adjustment of suspension point, and two outer side suspension mechanisms and two inner side suspension mechanisms are respectively driven and controlled by controller, can be adaptively adjusted according to the shape of workpiece, carry out multipoint suspension to workpiece, reduce shaking, improve the moving stability of workpiece;Utilize four walking branches to support two support cross beams 17 and two support longitudinal beams 18, so that the weight of workpiece is dispersed on four walking branches, reduce the pressure of moving track 1, improve the stability of overhead line car movement;Utilize wireless communication module to facilitate wireless communication between controller and remote control center, receive the control signal sent by remote control center.

[0025] Further, the walking branch comprises the walking shell 10, the walking drive motor 9 and two walking rotation shafts 7; the two walking rotation shafts 7 are respectively installed in rotation and longitudinally on the left and right sides of the walking shell 10; the moving rollers 8 for walking on the moving track 1 are installed on the two sides of the two walking rotation shafts 7; the limiting convex strips between the two moving rollers 8 on the same walking rotation shaft 7 are arranged transversely on the upper side of the moving track 1; the walking racks 5 are arranged along the length direction on the upper side of the limiting convex strips; the walking gears 6 engaged with the walking racks 5 are installed on the two walking rotation shafts 7; the walking drive motor 9 is used for driving one of the walking rotation shafts 7 to rotate, and is electrically connected with the controller through the walking drive circuit; the track limiting grooves 2 are arranged on the front and rear sides of the moving track 1; the extension rods 4 are arranged on the front and rear lower edges of the walking shell 10; the walking limiting rollers 3 respectively walking in the corresponding track limiting grooves 2 are rotatably installed on the lower ends of the two extension rods 4.

[0026] The cooperation between the moving rollers 8 and the moving track 1 reduces the friction and improves the stability of the transverse movement of the walking shell 10; the position relationship between the limiting convex strips and the two moving rollers 8 on the same walking rotation shaft 7 can limit the two moving rollers 8 to a certain extent and prevent the moving rollers 8 from deviating and derailing; the cooperation between the track limiting grooves 2 and the walking limiting rollers 3 can produce a certain traction effect when the walking shell 10 is slightly inclined forward and backward, and further prevent the moving rollers 8 from derailing.

[0027] Further, the walking shell 10 is rotatably and longitudinally installed on the walking rotation shaft 12; the walking rotation shaft 12 is located between the two walking rotation shafts 7 and has the same spacing as the two walking rotation shafts 7; the swing seats 11 are fixed on the two ends of the lower side of the support beam 17; the two swing seats 11 on the same support beam 17 are rotatably installed on the two swing rotation shafts 12 on the same group of walking branches; the swing plates 13 located in the corresponding walking shells 10 are fixed on the swing rotation shafts 12; the distance measuring sensors 14 for detecting the corresponding swing plates 13 are installed in the walking shells 10 and are electrically connected with the controller; the sound and light alarm 16 electrically connected with the controller is arranged on the control box 15.

[0028] The position relationship between the swing rotation shaft 12 and the two walking rotation shafts 7 disperses the weight to the four moving rollers 8 and further disperses the pressure; the swing rotation shaft 12 enables the end of the support beam 17 to produce a small amplitude auxiliary swing with the walking shell 10, preventing the walking branch from being raised after being stressed; the distance measuring sensor 14 detects the lower edge of the swing plate 13; when the swing of the swing plate 13 exceeds a certain amplitude, the controller controls the sound and light alarm 16 to issue an alarm and sends an alarm signal to the remote control center through the wireless communication module.

[0029] Further, the outer suspension mechanism comprises an outer moving base 20 and an outer longitudinal moving screw 24; the outer moving base 20 is in U shape; outer T-shaped grooves 21 are longitudinally arranged on the distal sides and the upper and lower sides of the two support longitudinal beams 18; the outer moving bases 20 of the two outer suspension mechanisms are respectively buckled on the two support longitudinal beams 18 with the openings opposite to each other; a plurality of outer limiting rollers 23 are rotatably installed on the three inner walls of the outer moving base 20, and the outer limiting rollers 23 on the three inner walls are respectively arranged to travel in the three outer T-shaped grooves 21 of the same support longitudinal beam 18; an outer driving block is fixed on the outer moving base 20; the outer longitudinal moving screws 24 of the two outer suspension mechanisms are respectively rotatably longitudinally installed on the distal sides of the two support longitudinal beams 18 and are respectively threadedly screwed through the outer driving blocks on the corresponding sides; a first longitudinal moving driving motor electrically connected with the controller through a first longitudinal moving driving circuit and a second longitudinal moving driving motor electrically connected with the controller through a second longitudinal moving driving circuit are respectively installed on the two support longitudinal beams 18; the first longitudinal moving driving motor and the second longitudinal moving driving motor are respectively used for driving the two outer longitudinal moving screws 24 to rotate; an outer lifting lug 36 is arranged on the lower side of each of the two outer moving bases 20.

[0030] The workpiece is hung by the outer lifting lug 36, the controller controls the first longitudinal moving driving motor and the second longitudinal moving driving motor to drive the two outer longitudinal moving screws 24 to rotate respectively, the outer longitudinal moving screw 24 drives the outer moving base 20 to longitudinally move through the outer driving block, so as to respectively adjust the positions of the workpieces on the two outer lifting lugs 36; the longitudinal sliding installation of the outer moving base 20 on the support longitudinal beam 18 is realized by the cooperation between the outer T-shaped groove 21 and the outer limiting roller 23, and the moving stability of the outer moving base 20 is improved.

[0031] Further, the inner suspension mechanism comprises an inner longitudinal moving branch and an inner transverse moving branch; the inner longitudinal moving branch comprises a longitudinal moving cross beam 19, a synchronous driving shaft 31, two inner longitudinal moving screws 26 and two inner moving seats 27; two inner T-shaped grooves 30 are correspondingly longitudinally arranged on opposite sides of the two supporting longitudinal beams 18, and the two inner T-shaped grooves 30 on the same supporting longitudinal beam 18 are respectively located on the front and rear sides of the supporting longitudinal beam 18; the two inner moving seats 27 are respectively longitudinally and slidingly installed in the two opposite inner T-shaped grooves 30; a plurality of inner limiting rollers 29 walking on the inner walls of the corresponding inner T-shaped grooves 30 are rotatably installed on the two inner moving seats 27; the two inner longitudinal moving screws 26 are respectively rotatably and longitudinally installed in the two opposite inner T-shaped grooves 30 and are respectively threadedly penetrated through the two inner moving seats 27; inner fixed seats 28 protruding from the inner T-shaped grooves 30 are arranged on the opposite sides of the two inner moving seats 27; the longitudinal moving cross beam 19 is connected and fixed on the two inner fixed seats 28; the synchronous driving shaft 31 is rotatably transversely installed on the two supporting longitudinal beams 18 and synchronously drives the two inner longitudinal moving screws 26 to rotate through the two bevel gear pairs; a third longitudinal moving driving motor electrically connected with the controller through a third longitudinal moving driving circuit and a fourth longitudinal moving driving motor electrically connected with the controller through a fourth longitudinal moving driving circuit are respectively installed on the two supporting longitudinal beams 18; the third longitudinal moving driving motor and the fourth longitudinal moving driving motor are respectively used for driving the synchronous driving shaft 31 of the two inner suspension mechanisms to rotate; the inner transverse moving branch is installed on the longitudinal moving cross beam 19 and is used for transversely adjusting the horizontally adjustable suspension point and is driven and controlled by the controller.

[0032] The cooperation between the inner limiting rollers 29 and the inner T-shaped grooves 30 improves the moving stability of the inner moving seats 27; the third longitudinal moving driving motor and the fourth longitudinal moving driving motor are respectively used for driving the synchronous driving shaft 31 of the two inner suspension mechanisms to rotate, so that the synchronous driving shaft 31 drives the two inner longitudinal moving screws 26 to synchronously rotate through the bevel gear pairs, thereby driving the two inner moving seats 27 to synchronously move and driving the longitudinal moving cross beam 19 to longitudinally move, thereby driving the inner transverse moving branch to longitudinally move, realizing small-amplitude longitudinal adjustment of the horizontally adjustable suspension point and adapting to the shape of the workpiece.

[0033] Further, the inner side transverse moving branch comprises a transverse moving seat 32 and a transverse moving drive screw 34; the transverse moving seat 32 is slidably installed in the longitudinal moving cross beam 19; a plurality of transverse moving limiting rollers 33 are rotatably installed on the transverse moving seat 32 and walk on the inner wall of the longitudinal moving cross beam 19; the transverse moving drive screw 34 is rotatably and transversely installed in the longitudinal moving cross beam 19 and is screwingly penetrated through the transverse moving seat 32; the first transverse moving drive motor electrically connected with the controller through the first transverse moving drive circuit and the second transverse moving drive motor electrically connected with the controller through the second transverse moving drive circuit are respectively installed on the longitudinal moving cross beam 19 of the two inner side suspension mechanisms; the first transverse moving drive motor and the second transverse moving drive motor respectively drive the transverse moving drive screw 34 of the two inner side suspension mechanisms to rotate through the transverse moving gear pair; a long hole 35 is transversely arranged on the lower side of the longitudinal moving cross beam 19; the inner side lifting lug 25 is fixed on the lower side of the transverse moving seat 32 and extends out of the long hole 35.

[0034] The workpiece is suspended by the inner side lifting lug 25; the controller controls the first transverse moving drive motor and the second transverse moving drive motor to drive the transverse moving drive screw 34 of the two inner side suspension mechanisms to rotate through the transverse moving gear pair; the transverse moving drive screw 34 drives the transverse moving seat 32 to move transversely in the longitudinal moving cross beam 19, so as to adjust the transverse position of the inner side lifting lug 25, to slightly adjust the transverse position of the horizontally adjustable suspension point and to further adapt to the shape of the workpiece; the cooperation between the transverse moving limiting rollers 33 and the inner wall of the longitudinal moving cross beam 19 reduces the friction and improves the moving stability of the transverse moving seat 32.

[0035] In the multi-point hoisting device for large workpiece coating, the controller adopts an existing single-chip microcomputer control module; the wireless communication module adopts an existing wireless communication module; the audible and visual alarm 16 adopts an existing audible and visual alarm; the distance measuring sensor 14 adopts an existing distance measuring sensor; the walking drive motor 9, the first longitudinal moving drive motor, the second longitudinal moving drive motor, the third longitudinal moving drive motor, the fourth longitudinal moving drive motor, the first transverse moving drive motor and the second transverse moving drive motor all adopt existing stepping motors; the walking drive circuit, the first longitudinal moving drive circuit, the second longitudinal moving drive circuit, the third longitudinal moving drive circuit, the fourth longitudinal moving drive circuit, the first transverse moving drive circuit and the second transverse moving drive circuit all adopt corresponding stepping motor drive circuits.

[0036] As described above, although the present application has been shown and described with respect to a certain preferred embodiments thereof, it is to be understood that the present application is not limited to the foregoing. Various changes in form and details can be made without departing from the spirit and scope of the present application as defined in the appended claims.

Claims

1. A multi-point hoist for use in painting large workpieces, characterized by: The device comprises a control box (15), a track car, two outer suspension mechanisms and two inner suspension mechanisms; the track car comprises two moving tracks (1), two support cross beams (17), two support longitudinal beams (18) and four walking branches; the two moving tracks (1) are arranged transversely; the four walking branches are arranged in two groups respectively and walk on the two moving tracks (1); the two support cross beams (17) are transversely arranged on the two groups of walking branches respectively; the two support longitudinal beams (18) are longitudinally connected to the two support cross beams (17); the two outer suspension mechanisms are longitudinally movably arranged on the two support longitudinal beams (18) respectively; the two inner suspension mechanisms are longitudinally movably arranged on the two support longitudinal beams (18); the outer suspension mechanisms and the inner suspension mechanisms are used for providing longitudinally adjustable suspension points and horizontally adjustable suspension points for workpieces respectively; the control box (15) is provided with a controller and a wireless communication module electrically connected to the controller; the walking branches, the outer suspension mechanisms and the inner suspension mechanisms are driven and controlled by the controller.

2. The multi-point lifting device for coating large workpieces according to claim 1, characterized in that: The walking branch comprises a walking shell (10), a walking drive motor (9) and two walking shafts (7); the two walking shafts (7) are rotatably longitudinally arranged on the walking shell (10); the two walking shafts (7) are provided with two moving rollers (8) arranged on the moving tracks (1); the moving tracks (1) are provided with a walking rack (5) along the length direction; the two walking shafts (7) are provided with walking gears (6) engaged with the walking rack (5); the walking drive motor (9) is used for driving one of the walking shafts (7) to rotate and is electrically connected to the controller through a walking drive circuit.

3. The multi-point lifting device for coating large workpieces according to claim 2, characterized in that: The walking shell (10) is rotatably longitudinally provided with a swing shaft (12); the support cross beam (17) is arranged on the two swing shafts (12) of the same group of walking branches through two swing seats (11); the swing plate (13) is fixed on the swing shaft (12) and located in the corresponding walking shell (10); the distance measuring sensor (14) for detecting the corresponding swing plate (13) is arranged in the walking shell (10) and is electrically connected to the controller; the sound-light alarm (16) electrically connected to the controller is arranged on the control box (15).

4. The multi-point hanger for coating large workpieces of claim 1, wherein: The outer suspension mechanism comprises an outer moving seat (20) and an outer longitudinal moving screw (24); the outer moving seats (20) of the two outer suspension mechanisms are longitudinally slidably arranged on the far sides of the two support longitudinal beams (18) respectively; the outer longitudinal moving screw (24) is rotatably longitudinally arranged on the support longitudinal beam (18) and is used for driving the outer moving seat (20) to move longitudinally; the first longitudinal moving drive motor electrically connected to the controller through a first longitudinal moving drive circuit and the second longitudinal moving drive motor electrically connected to the controller through a second longitudinal moving drive circuit are arranged on the two support longitudinal beams (18) respectively; the first longitudinal moving drive motor and the second longitudinal moving drive motor are used for driving the outer longitudinal moving screws (24) of the two outer suspension mechanisms to rotate respectively; the outer lifting lug (36) for suspending the workpiece is arranged on the outer moving seat (20).

5. The multi-point hanger for coating large workpieces of claim 1, wherein: The inner side suspension mechanism comprises an inner side longitudinal moving branch and an inner side transverse moving branch; the inner side longitudinal moving branch comprises a longitudinal moving cross beam (19), a synchronous driving shaft (31), two inner side longitudinal moving screws (26) and two inner side moving bases (27); the two inner side moving bases (27) are longitudinally slidably installed on the two supporting longitudinal beams (18) respectively; the two inner side longitudinal moving screws (26) are rotatably installed on the two supporting longitudinal beams (18) respectively and are used for driving the two inner side moving bases (27) to move longitudinally respectively; the inner side fixed bases (28) are arranged on the two inner side moving bases (27) respectively; the longitudinal moving cross beam (19) is connected to the two inner side fixed bases (28); the synchronous driving shaft (31) is rotatably transversely installed on the two supporting longitudinal beams (18) and synchronously drives the two inner side longitudinal moving screws (26) to rotate through the two bevel gear pairs; the third longitudinal moving driving motor electrically connected to the controller through the third longitudinal moving driving circuit and the fourth longitudinal moving driving motor electrically connected to the controller through the fourth longitudinal moving driving circuit are installed on the two supporting longitudinal beams (18) respectively; the third longitudinal moving driving motor and the fourth longitudinal moving driving motor are used for driving the synchronous driving shaft (31) of the two inner side suspension mechanisms to rotate respectively; the inner side transverse moving branch is installed on the longitudinal moving cross beam (19) and is used for transversely adjusting the horizontally adjustable suspension point and is driven and controlled by the controller.

6. The multi-point lifting device for coating large workpieces according to claim 5, characterized in that: The inner side transverse moving branch comprises a transverse moving base (32) and a transverse moving driving screw (34); the transverse moving base (32) is transversely slidably installed on the longitudinal moving cross beam (19); the transverse moving driving screw (34) is rotatably installed on the longitudinal moving cross beam (19) and is used for driving the transverse moving base (32) to move transversely; the first transverse moving driving motor electrically connected to the controller through the first transverse moving driving circuit and the second transverse moving driving motor electrically connected to the controller through the second transverse moving driving circuit are installed on the longitudinal moving cross beams (19) of the two inner side suspension mechanisms respectively; the first transverse moving driving motor and the second transverse moving driving motor drive the transverse moving driving screws (34) of the two inner side suspension mechanisms to rotate through the transverse gear pairs respectively; the inner side lifting lug (25) used for suspending the workpiece is fixed on the transverse moving base (32).

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