A mechanism for combining a body tooling fixture with a face difference detection system

Abstract

The present application relates to the technical field of automobile, specifically a kind of mechanism of body tool fixture and surface difference detection system combination, including bottom plate, the bottom plate is fixedly installed with a plurality of first electric telescopic rod, the telescopic end of every two first electric telescopic rod is fixedly installed with frame plate, every frame plate is fixedly installed with side frame, every side frame is provided with first drive motor, the output end of every first drive motor is fixedly installed with first screw rod through bearing passing through side frame, every first screw rod is screw-mounted with screw frame, every screw frame is fixedly installed with two telescopic cylinders, every telescopic cylinder is fixedly installed with pneumatic vacuum generator on telescopic end, detection mechanism is arranged on the bottom bracket;The present application is taken by the interface plate to the welding waste that falls, by controlling third drive motor operation, make the interface plate on the interface plate and take waste to be cleaned, improve work efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile, in particular to a kind of body tooling fixture and surface difference detection system combined mechanism. BACKGROUND

[0002] At present, the size of light passenger car body is large, in order to reduce cost, appearance covering stamping parts need to be divided into parts, and then spliced by welding, the appearance covering stamping parts will appear misplacement and produce surface difference during welding splicing process, for large sheet metal parts and large sheet metal parts lap, the most common way is to use "suction cup + support" as body tooling fixture, i.e. vacuum generator generates vacuum to make suction cup adsorb sheet metal parts to adhere to support surface, so as to control the surface difference of two sheet metal parts lap, through real-time surface difference detection, whether the surface difference is out of tolerance before welding is prompted.

[0003] When welding large sheet metal parts of vehicle body, a large amount of welding waste will be generated, which needs to be cleaned frequently by workers, thereby increasing the workload of workers, and deliberately spending time to clean the waste reduces the welding efficiency of large sheet metal parts of vehicle body, and there is no facility for conveniently cleaning the welding waste.

[0004] Therefore, the present application provides a kind of body tooling fixture and surface difference detection system combined mechanism which can conveniently clean welding waste. SUMMARY

[0005] The present application provides a kind of body tooling fixture and surface difference detection system combined mechanism which can conveniently clean welding waste.

[0006] The technical scheme adopted by the present application to solve the technical problem is: a kind of body tooling fixture and surface difference detection system combined mechanism, including bottom plate, a plurality of first electric telescopic rods are fixedly installed on the bottom plate, every two first electric telescopic rods are fixedly installed with frame plate on the telescopic end, every frame plate is fixedly installed with side frame, every side frame is provided with first drive motor, the output end of every first drive motor is fixedly installed with first screw rod through bearing passing through side frame, every first screw rod is screw-installed with screw frame, every screw frame is fixedly installed with two telescopic cylinders, every telescopic cylinder is fixedly installed with gas control vacuum generator on the telescopic end, the detection mechanism is arranged on the bottom frame, and further includes two air blowing mechanisms and scraping mechanism;

[0007] Every frame plate is provided with two second electric telescopic rods, and the telescopic end of the second electric telescopic rod is movably penetrated through the frame plate, and every two second electric telescopic rods are fixedly installed with clamping plate on the telescopic end.

[0008] The access scraping mechanism comprises an access plate fixedly installed on the plurality of first electric telescopic rods, a round rod is arranged on the detection mechanism, an end of the round rod is fixedly installed with a third driving motor, an output end of the third driving motor is fixedly installed with a third screw rod, an inner block is threadedly installed on the third screw rod, and a scraper is fixedly installed on the inner block and in contact with the access plate.

[0009] The air blowing mechanism is arranged on the access scraping mechanism and is used for cleaning the welding waste remaining on the rack plate by air blowing.

[0010] Further, the detection mechanism comprises an L-shaped rack fixedly installed on the bottom plate, a top end of the L-shaped rack is fixedly installed with a second driving motor, an output end of the second driving motor is fixedly installed with a second screw rod through a bearing penetrating through the L-shaped rack, and a limiting rod is fixedly installed on the L-shaped rack.

[0011] Further, the detection mechanism further comprises a threaded block threadedly installed on the second screw rod, the threaded block is movably connected with the limiting rod, and a top rack is fixedly installed on the threaded block.

[0012] Further, the detection mechanism further comprises a laser detection head fixedly installed at an end of the top rack, and a display screen is fixedly installed on the L-shaped rack.

[0013] Further, the air blowing mechanism comprises an outer sleeve fixedly installed on the scraper, an inner sleeve is movably installed on the inner side of the outer sleeve, a movable rod is movably installed on the inner side of the inner sleeve, a supporting block is fixedly installed at an end of the movable rod, a short rod is fixedly installed on the supporting block, a guide shell is fixedly installed on each of the rack plates, and the guide shell is movably connected with the short rod.

[0014] Further, the air blowing mechanism further comprises a connecting rack fixedly installed on the supporting block, a buckle is fixedly installed on the connecting rack, a supporting sleeve is movably installed on the buckle, and an air pipe is fixedly installed on the supporting sleeve.

[0015] Further, the air blowing mechanism further comprises a third electric telescopic rod arranged on the connecting rack, a shaft shell is fixedly installed on a movable end of the third electric telescopic rod, and a semicircular block is movably installed on the shaft shell and fixedly connected with the air pipe.

[0016] Further, a semicircular shell is fixedly installed on the access plate, two long rods are fixedly installed on the bottom plate, a limiting bolt is threadedly installed on each of the long rods, a sliding block is movably installed on each of the long rods, and a loading shell is fixedly installed on the two sliding blocks.

[0017] Further, the bottom plate is fixedly installed with a driving motor, a fourth screw rod is fixedly installed on an output end of the driving motor, a moving block is threadedly installed on the fourth screw rod, a fixed shaft is fixedly installed on the moving block, an arc block is movably installed on the fixed shaft, a moving plate is fixedly installed on an end of the arc block, and the moving plate is located on an inner side of the loading shell.

[0018] The beneficial effects of the present application are:

[0019] (1) The vehicle body tooling fixture and surface difference detection system combined mechanism disclosed by the present application can pick up the falling welding waste through the connecting plate, clean the waste picked up on the connecting plate by controlling the operation of the third driving motor, thereby facilitating the cleaning of the welding waste and improving the work efficiency.

[0020] (2) The vehicle body tooling fixture and surface difference detection system combined mechanism disclosed by the present application can further improve the cleaning work of the welding waste by blowing the welding waste remaining on the connecting plate through the air pipe.

[0021] (3) The vehicle body tooling fixture and surface difference detection system combined mechanism disclosed by the present application can move the welding waste on the connecting plate scraped by the scraper to the inner side of the loading shell through the semi-circular shell, so that the loading shell can concentrate the welding waste, and the welding waste can be uniformly moved to the inner side of the loading shell through the moving plate, so as to prevent the welding waste from being accumulated at one place of the loading shell and easily falling out of the loading shell. BRIEF DESCRIPTION OF DRAWINGS

[0022] The present application will be further described below in combination with the drawings and examples.

[0023] Figure 1 It is a perspective structural schematic view of the vehicle body tooling fixture and surface difference detection system combined mechanism of the present application;

[0024] Figure 2 It is a perspective structural schematic view of the connecting plate of the vehicle body tooling fixture and surface difference detection system combined mechanism of the present application;

[0025] Figure 3 It is a perspective structural schematic view of the laser detection head of the vehicle body tooling fixture and surface difference detection system combined mechanism of the present application;

[0026] Figure 4 It is a perspective structural schematic view of the connecting plate of the vehicle body tooling fixture and surface difference detection system combined mechanism of the present application;

[0027] Figure 5 It is a perspective structural schematic view of the third screw rod of the vehicle body tooling fixture and surface difference detection system combined mechanism of the present application;

[0028] Figure 6 A scraper three-dimensional structure schematic view of a mechanism of a body tool clamp combined with a surface difference detection system of the present application;

[0029] Figure 7 An outer sleeve exploded three-dimensional structure schematic view of a mechanism of a body tool clamp combined with a surface difference detection system of the present application;

[0030] Figure 8 A loading shell exploded structure schematic view of a mechanism of a body tool clamp combined with a surface difference detection system of the present application.

[0031] In the figure: 1, bottom plate; 2, first electric telescopic rod; 3, shelf plate; 4, second electric telescopic rod; 5, clamping plate; 6, side frame; 7, first drive motor; 8, first screw rod; 9, threaded shelf; 10, telescopic cylinder; 11, air control vacuum generator; 12, L-shaped shelf; 13, second drive motor; 14, second screw rod; 15, limit rod; 16, threaded block; 17, top shelf; 18, laser detection head; 19, display screen; 20, connecting plate; 21, round rod; 22, third drive motor; 23, third screw rod; 24, inner block; 25, scraper; 26, outer sleeve; 27, inner sleeve; 28, movable rod; 29, supporting block; 30, short rod; 301, guide shell; 31, connecting shelf; 32, buckle block; 33, supporting sleeve; 34, air pipe; 35, third electric telescopic rod; 36, shaft shell; 37, semicircular block; 38, semicircular shell; 39, long rod; 40, limit pin; 41, sliding block; 42, loading shell; 43, drive motor; 44, fourth screw rod; 45, moving block; 46, fixed shaft; 47, arc block; 48, moving plate. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0033] As Figures 1-8As shown, the body tool clamp and the surface difference detection system combined mechanism of the present application comprises a bottom plate 1, a plurality of first electric telescopic rods 2 are fixedly installed on the bottom plate 1, a shelf plate 3 is fixedly installed on the telescopic ends of every two first electric telescopic rods 2, two second electric telescopic rods 4 are arranged on each shelf plate 3, the telescopic ends of the second electric telescopic rods 4 are movably penetrated through the shelf plate 3, a clamping plate 5 is fixedly installed on the telescopic ends of every two second electric telescopic rods 4, a side frame 6 is fixedly installed on each shelf plate 3, a first driving motor 7 is arranged on each side frame 6, a first screw rod 8 is fixedly installed on the output end of each first driving motor 7 through a bearing and penetrates through the side frame 6, a threaded frame 9 is threadedly installed on each first screw rod 8, two telescopic cylinders 10 are fixedly installed on each threaded frame 9, a pneumatic vacuum generator 11 is fixedly installed on the telescopic end of each telescopic cylinder 10, a detection mechanism is arranged on the bottom frame, the detection mechanism comprises an L-shaped frame 12 fixedly installed on the bottom plate 1, a second driving motor 13 is fixedly installed on the top end of the L-shaped frame 12, a second screw rod 14 is fixedly installed on the output end of the second driving motor 13 through a bearing and penetrates through the L-shaped frame 12, a limiting rod 15 is fixedly installed on the L-shaped frame 12, a threaded block 16 is threadedly installed on the second screw rod 14, and the threaded block 16 is movably connected with the limiting rod 15, a top frame 17 is fixedly installed on the threaded block 16, a laser detection head 18 is fixedly installed on the end of the top frame 17, and a display screen 19 is fixedly installed on the L-shaped frame 12.

[0034] Specifically, the two large plate pieces to be welded are carried onto the frame plate 3 by the carrying device, the pneumatic vacuum generator 11 is started, the telescopic end of the telescopic cylinder 10 is controlled to extend, the telescopic end of the telescopic cylinder 10 can drive the pneumatic vacuum generator 11 to move downward, the pneumatic vacuum generator 11 drives the large plate piece by the suction cup, the telescopic end of the telescopic cylinder 10 is controlled to rise to drive the large plate piece to rise, the first driving motor 7 is controlled to operate, the output end of the first driving motor 7 rotates to drive the first lead screw 8 to rotate, the first lead screw 8 drives the threaded frame 9 to move through the threaded action, the threaded frame 9 drives the large plate piece to move through the telescopic cylinder 10 and the pneumatic vacuum generator 11, the two large plate pieces to be welded are in contact to perform the lapping work, the telescopic end of the first electric telescopic rod 2 is controlled to extend to drive the frame plate 3 to move upward, the frame plate 3 contacts the large plate piece to support the large plate piece with the pneumatic vacuum generator 11, the telescopic end of the second electric telescopic rod 4 is controlled to extend to drive the clamping plate 5 to move, the two clamping plates 5 cooperate with each other to clamp and fix the built two large plate pieces, thereby increasing the stability of the built two large plate pieces, the second driving motor 13 is controlled to operate, the output end of the second driving motor 13 rotates to drive the second lead screw 14 to rotate, the second lead screw 14 drives the threaded block 16 to move through the threaded action, the threaded block 16 drives the laser detection head 18 to move through the top frame 17, the laser detection head 18 moves above the built place of the two large plate pieces, thereby the laser detection head 18 performs the surface difference detection work on the built place of the two large plate pieces, the detected data is transmitted to the display screen 19, if it exceeds the set standard value, an audible and visual alarm is performed, the possibility of the welding assembly of the outer cover being returned for repair and scrapped due to the surface difference is reduced, and the worker performs the welding work on the two large plate pieces.

[0035] In the embodiment, the contact scraping mechanism comprises a contact plate 20 fixedly installed on the plurality of first electric telescopic rods 2, a round rod 21 is arranged on the detection mechanism, a third driving motor 22 is fixedly installed at the end of the round rod 21, a third lead screw 23 is fixedly installed on the output end of the third driving motor 22, an inner block 24 is threadedly installed on the third lead screw 23, and a scraper 25 is fixedly installed on the inner block 24 and in contact with the contact plate 20.

[0036] The blowing mechanism is arranged on the scraping mechanism, and is used for cleaning the welding waste left on the rack plate 3 by blowing. The blowing mechanism comprises an outer sleeve 26 fixedly arranged on the scraper 25, an inner sleeve 27 movably arranged on the inner side of the outer sleeve 26, a movable rod 28 movably arranged on the inner side of the inner sleeve 27, a supporting block 29 fixedly arranged on the end of the movable rod 28, a short rod 30 fixedly arranged on the supporting block 29, a guide shell 301 fixedly arranged on each rack plate 3, and the guide shell 301 is movably connected with the short rod 30. The blowing mechanism further comprises a connecting frame 31 fixedly arranged on the supporting block 29, a buckle 32 fixedly arranged on the connecting frame 31, a supporting sleeve 33 movably arranged on the buckle 32, and a gas pipe 34 fixedly arranged on the supporting sleeve 33. The blowing mechanism further comprises a third electric telescopic rod 35 arranged on the connecting frame 31, an axle shell 36 fixedly arranged on the movable end of the third electric telescopic rod 35, and a semicircle block 37 movably arranged on the axle shell 36 and fixedly connected with the gas pipe 34.

[0037] Specifically, the welding waste falling from the welding machine is collected by the connecting plate 20. The third driving motor 22 is controlled to rotate, so that the output end of the third driving motor 22 drives the third screw rod 23 to rotate, the third screw rod 23 drives the inner block 24 to move through the thread action, the inner block 24 drives the scraper 25 to move, and the scraper 25 is attached to the surface of the connecting plate 20 to clean the welding waste on the surface of the connecting plate 20. When the rack plate 3 moves upward, the guide shell 301, the short rod 30 and the supporting block 29 drive the movable rod 28 to move upward, so that the movable rod 28 drives the inner sleeve 27 to move upward under the action of an external force. The gas pipe 34 is connected with the gas pump through an external pipeline. The gas pump is controlled to generate gas, which is sprayed out of the gas pipe 34 through the pipeline. The third electric telescopic rod 35 is controlled to move, so that the third electric telescopic rod 35 drives the gas pipe 34 to move through the axle shell 36 and the semicircle block 37. The semicircle block 37 rotates around the axle shell 36 under the action of an external force. The gas pipe 34 drives the supporting sleeve 33 to rotate around the buckle 32 under the action of an external force. When the scraper 25 moves, the scraper 25 drives the movable gas pipe 34 to move along the top of the rack plate 3 through the outer sleeve 26, the inner sleeve 27, the movable rod 28, the supporting block 29, the connecting frame 31, the buckle 32 and the supporting sleeve 33. At the same time, the supporting block 29 drives the short rod 30 to move along the inner side of the guide shell 301, so that the gas pipe 34 sprays gas to blow the welding waste left on the rack plate 3, so that the welding waste falls on the connecting plate 20, thereby facilitating the cleaning of the welding waste and improving the work efficiency.

[0038] In the embodiment, the connecting plate 20 is fixedly provided with a semicircular shell 38, the bottom plate 1 is fixedly provided with two long rods 39, the long rod 39 is threadedly provided with a limiting pin 40, the long rod 39 is movably provided with a sliding block 41, the sliding blocks 41 are fixedly provided with a loading shell 42, the bottom plate 1 is fixedly provided with a driving motor 43, the output end of the driving motor 43 is fixedly provided with a fourth screw rod 44, the fourth screw rod 44 is threadedly provided with a moving block 45, the moving block 45 is fixedly provided with a fixed shaft 46, the fixed shaft 46 is movably provided with an arc block 47, the end of the arc block 47 is fixedly provided with a moving plate 48, and the moving plate 48 is located at the inner side of the loading shell 42.

[0039] Specifically, the scraper 25 scrapes the welding waste on the connecting plate 20 to move to the inner side of the loading shell 42 through the semicircular shell 38, so that the loading shell 42 can concentrate the loading of the welding waste, the driving motor 43 is controlled to rotate, the output end of the driving motor 43 drives the fourth screw rod 44 to rotate, the fourth screw rod 44 drives the moving block 45 to move through the screw thread, the moving block 45 drives the moving plate 48 to move at the inner side of the loading shell 42 through the fixed shaft 46 and the arc block 47, the moving plate 48 can evenly spread the welding waste accumulated in the loading shell 42, the driving motor 43 is controlled to repeatedly reverse, and the welding waste can be evenly moved at the inner side of the loading shell 42 through the moving plate 48, so as to prevent the welding waste from being accumulated at one place of the loading shell 42 and easily falling out of the loading shell 42.

[0040] When the welding waste loaded in the loading shell 42 needs to be processed, the limiting pin 40 is screwed to move under the screw thread of the long rod 39, the limiting pin 40 is unscrewed from the long rod 39 by the worker, the loading shell 42 is moved by the handle, the loading shell 42 drives the sliding block 41 to move along the long rod 39 under the action of the external force, the sliding block 41 is separated from the long rod 39, the moving plate 48 is rotated, the moving plate 48 drives the arc block 47 to rotate around the fixed shaft 46 under the action of the external force, the moving plate 48 moves out of the inner side of the loading shell 42, the worker moves the loading shell 42 to process the welding waste in the loading shell 42, and then the processed loading shell 42 is fixed on the long rod 39 through the sliding block 41, the limiting pin 40 is screwed, and the moving plate 48 is rotated to the inner side of the loading shell 42.

[0041] Working principle: the workers carry two large pieces of sheet metal to be welded to the frame plate 3 through the carrying device, start the pneumatic vacuum generator 11, control the telescopic end of the telescopic cylinder 10 to extend, so that the telescopic end of the telescopic cylinder 10 can drive the pneumatic vacuum generator 11 to move downward, so that the pneumatic vacuum generator 11 drives the large sheet metal through the suction cup, then control the telescopic end of the telescopic cylinder 10 to rise to drive the large sheet metal to rise, control the first driving motor 7 to operate, so that the output end of the first driving motor 7 rotates to drive the first lead screw 8 to rotate, so that the first lead screw 8 drives the threaded frame 9 to move through the threaded action, so that the threaded frame 9 drives the large sheet metal to move through the telescopic cylinder 10 and the pneumatic vacuum generator 11, so that the two large sheet metals to be welded are in contact and lapped, control the telescopic end of the first electric telescopic rod 2 to extend to drive the frame plate 3 to move upward, so that the frame plate 3 contacts the large sheet metal to support the large sheet metal with the pneumatic vacuum generator 11, then control the telescopic end of the second electric telescopic rod 4 to extend to drive the clamping plate 5 to move, so that the two clamping plates 5 cooperate with each other to clamp and fix the two large sheet metals built, control the second driving motor 13 to operate, so that the output end of the second driving motor 13 rotates to drive the second lead screw 14 to rotate, so that the second lead screw 14 drives the threaded block 16 to move through the threaded action, so that the threaded block 16 drives the laser detection head 18 to move through the top frame 17, so that the laser detection head 18 moves above the built place of the two large sheet metals, so that the laser detection head 18 detects the surface difference of the built place of the two large sheet metals, and the detected data is transmitted to the display screen 19, if it exceeds the set standard value, the audible and visual alarm is given, when there is no problem in detection, the workers weld the two large sheet metals, after welding, the welding waste falling is collected through the connecting plate 20, control the third driving motor 22 to operate, so that the scraper 25 cleans the waste collected on the connecting plate 20, the welding waste scraped from the connecting plate 20 moves to the inside of the loading shell 42 through the semicircular shell 38, so that the loading shell 42 can concentrate the welding waste, and the welding waste can be uniformly moved in the inside of the loading shell 42 through the moving plate 48.

[0042] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A mechanism combined with a body tool clamp and a surface difference detection system, comprising a bottom plate (1), a plurality of first electric telescopic rods (2) are fixedly installed on the bottom plate (1), a rack plate (3) is fixedly installed on the telescopic ends of every two first electric telescopic rods (2), a side rack (6) is fixedly installed on each rack plate (3), a first drive motor (7) is arranged on each side rack (6), a first lead screw (8) is fixedly installed on the output end of each first drive motor (7) through a bearing and penetrates through the side rack (6), a threaded rack (9) is threadedly installed on each first lead screw (8), two telescopic cylinders (10) are fixedly installed on each threaded rack (9), a pneumatic vacuum generator (11) is fixedly installed on the telescopic end of each telescopic cylinder (10), and a detection mechanism is arranged on the bottom plate, characterized in that: It also includes two air blowing mechanisms and a taking and scraping mechanism; Each of the shelf plates (3) is provided with two second electric telescopic rods (4), the telescopic ends of the second electric telescopic rods (4) are movably penetrated through the shelf plates (3), and a clamping plate (5) is fixedly and jointly installed on the telescopic ends of each two second electric telescopic rods (4); The taking and scraping mechanism includes a connecting plate (20) fixedly installed on the first electric telescopic rods (2), a round rod (21) provided on the detection mechanism, a third driving motor (22) fixedly installed at the end of the round rod (21), a third screw rod (23) fixedly installed on the output end of the third driving motor (22), an inner block (24) threadedly installed on the third screw rod (23), and a scraping plate (25) fixedly installed on the inner block (24) and in contact with the connecting plate (20). The air blowing mechanism is arranged on the taking and scraping mechanism and is used for cleaning the welding waste remaining on the shelf plates (3) by air blowing.

2. The mechanism of claim 1, in combination with a system for detecting surface differences, wherein: The detection mechanism includes an L-shaped frame (12) fixedly installed on the bottom plate (1), a second driving motor (13) fixedly installed at the top end of the L-shaped frame (12), a second screw rod (14) fixedly installed on the output end of the second driving motor (13) through a bearing penetrating through the L-shaped frame (12), and a limiting rod (15) fixedly installed on the L-shaped frame (12).

3. The mechanism of claim 2, in combination with a system for detecting surface differences, wherein: The detection mechanism further includes a threaded block (16) threadedly installed on the second screw rod (14) and movably connected with the limiting rod (15), and a top frame (17) fixedly installed on the threaded block (16).

4. The mechanism of claim 3, in combination with a system for detecting surface differences, wherein: The detection mechanism further includes a laser detection head (18) fixedly installed at the end of the top frame (17), and a display screen (19) fixedly installed on the L-shaped frame (12).

5. The mechanism of claim 1, in combination with a system for detecting surface differences, wherein: The air blowing mechanism includes an outer sleeve (26) fixedly installed on the scraping plate (25), an inner sleeve (27) movably installed on the inner side of the outer sleeve (26), a movable rod (28) movably installed on the inner side of the inner sleeve (27), a supporting block (29) fixedly installed at the end of the movable rod (28), a short rod (30) fixedly installed on the supporting block (29), a guide shell (301) fixedly installed on each of the shelf plates (3), and the guide shell (301) movably connected with the short rod (30).

6. The mechanism of claim 5, in combination with a system for detecting surface differences, wherein: The air blowing mechanism further includes a connecting frame (31) fixedly installed on the supporting block (29), a buckling block (32) fixedly installed on the connecting frame (31), a supporting sleeve (33) movably installed on the buckling block (32), and an air pipe (34) fixedly installed on the supporting sleeve (33).

7. The mechanism of claim 6, in combination with a system for detecting surface differences, wherein: The air blowing mechanism further includes a third electric telescopic rod (35) arranged on the connecting frame (31), an axle shell (36) fixedly installed on the movable end of the third electric telescopic rod (35), and a semicircular block (37) movably installed on the axle shell (36) and fixedly connected with the air pipe (34).

8. The mechanism of claim 1 in combination with a system for detecting surface differences, wherein: The half circle shell (38) is fixedly installed on the web (20), two long rods (39) are fixedly installed on the bottom plate (1), a limiting pin (40) is threadedly installed on each long rod (39), a sliding block (41) is movably installed on each long rod (39), and the two sliding blocks (41) are jointly and fixedly installed with a loading shell (42).

9. A mechanism for a vehicle body tooling fixture in combination with a surface difference detection system according to claim 8, characterized in that: A driving motor (43) is fixedly installed on the bottom plate (1), a fourth screw rod (44) is fixedly installed on the output end of the driving motor (43), a moving block (45) is threadedly installed on the fourth screw rod (44), a fixed shaft (46) is fixedly installed on the moving block (45), an arc block (47) is movably installed on the fixed shaft (46), a moving plate (48) is fixedly installed on the end of the arc block (47), and the moving plate (48) is located on the inner side of the loading shell (42).

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