Automatic taking and placing device for automobile plastic bumpers

Abstract

The invention discloses an automatic taking and placing device for automobile plastic bumpers, and relates to the technical field of workpiece feeding and discharging devices.The automatic taking and placing device comprises an industrial robot, a mounting frame, a taking and placing mechanism and a cleaning mechanism, the industrial robot is mounted on a fixing frame on the side face of a machining device through a base, and the mounting frame is arranged on an end effector of the industrial robot; the taking and placing mechanism is arranged on the mounting frame and used for adsorbing the bumper to be transferred, and the cleaning mechanism is arranged on the mounting frame and used for cleaning the position, to be adsorbed, of the bumper. The bristles on the cleaning brush clean the adsorption surface of the bumper, the cleaning brush adaptively rotates on the arc-shaped rod in the downward moving process of the mounting frame, and the bristles on the cleaning brush make contact with the surface of the bumper all the time through the third spring on the arc-shaped rod, so that dust and impurities on the surface of the bumper are more efficiently and thoroughly cleaned.

Description

Technical Field

[0001] The invention relates to the technical field of workpiece loading and unloading devices, and in particular to an automatic picking and placing device for automobile plastic bumpers. Background Art

[0002] The bumper is a key component on a car, mainly located at the front and rear ends of the vehicle. It is used to absorb and disperse impact energy during a collision to protect the vehicle structure and passengers from direct injury. In addition to safety functions, the bumper also has a certain decorative effect and can enhance the overall appearance of the vehicle.

[0003] When the bumper is produced and processed, it is necessary to use a pick-and-place device to load the bumper to be processed onto the processing device and to unload the processed bumper from the processing device. However, when the bumper is subjected to processing that produces powder chips, such as drilling and grinding, if the processed bumper is unloaded through the vacuum suction cup on the pick-and-place device, there will be powder chips and impurities between the vacuum suction cup and the bumper, which will cause unstable adsorption between the vacuum suction cup and the bumper surface, causing danger. Summary of the invention

[0004] The object of the present invention is to provide an automatic pick-up and placement device for automobile plastic bumpers to overcome the above-mentioned defects in the prior art.

[0005] An automatic pick-and-place device for automobile plastic bumpers, comprising an industrial robot, a mounting frame, a pick-and-place mechanism and a cleaning mechanism, wherein the industrial robot is mounted on a fixing frame on the side of a processing device through a base, and the mounting frame is mounted on an end effector of the industrial robot;

[0006] The pick-and-place mechanism is arranged on the mounting frame and is used to adsorb the bumper to be transferred;

[0007] The cleaning mechanism is arranged on the mounting frame and is used for cleaning the position to be adsorbed on the bumper.

[0008] Preferably, the mounting frame includes a support rod and a fixed plate, wherein two support rods are provided, a connecting rod is provided between the lower ends of the two support rods, a mounting plate is provided between the tops of the two support rods, and the fixed plate is provided on the mounting plate and connected to the end effector of the industrial robot.

[0009] Preferably, the picking and placing mechanism includes an adjusting block, a vacuum suction cup and a spring. The adjusting block is provided with two and is rotatably connected to the two sides of the connecting rod. The adjusting block is abutted against the connecting rod through a tightening screw threaded thereon. The air pipe on the vacuum suction cup is slidably connected to the adjusting block. The spring is provided on the air pipe of the vacuum suction cup and is located between the adjusting block and the suction cup body of the vacuum suction cup. A nut is threadedly connected to the air pipe of the vacuum suction cup.

[0010] Preferably, the cleaning mechanism includes a driving tube, a second spring, a cleaning brush and a fixing cylinder. There are two driving tubes which are symmetrically arranged on both sides of the support rod. Both ends of each driving tube are connected to the two support rods through fixing plates respectively. The two ends of the driving tube are respectively slidably connected with driving rods. One end of each driving rod is provided with a first piston slidably connected with the driving tube, and the other end of the driving rod is provided with a retaining disc. The second spring is sleeved on the driving rod and located between the retaining disc and the driving tube. The two ends of the driving tube are respectively slidably connected with moving discs. The retaining disc and the moving disc are connected through a plurality of support rods. The cleaning brush is arranged below the vacuum suction cup. The upper end of the cleaning brush is slidably connected to an arc-shaped rod in the groove of the moving disc. A third spring is sleeved on the arc-shaped rod and located between the cleaning brush and the upper wall of the groove. The fixing cylinder corresponds to the cleaning brush one by one, and a guide rod is slidably connected to the lower end thereof. One end of the guide rod is provided with a second piston slidably connected with the fixing cylinder, and the other end of the guide rod is provided with a pressing head. A fourth spring is sleeved on the guide rod and located between the fixing cylinder and the pressing head. The fixing cylinder is respectively connected to the end of the driving tube through a connecting hose, and an air outlet is arranged in the middle of the driving tube.

[0011] Preferably, the support rod is of a "U"-shaped structure with the opening facing downward.

[0012] Preferably, an arc-shaped connecting plate is arranged between two adjusting blocks on the same connecting rod.

[0013] Preferably, a handle is arranged on the side surface of the connecting plate.

[0014] Preferably, weight-reducing holes are symmetrically arranged on both sides of the mounting plate.

[0015] According to the picking and placing method of the automatic picking and placing device for an automotive plastic bumper described above, the method includes the following steps:

[0016] S1. Move the mounting bracket above the bumper to be picked and placed through an industrial robot.

[0017] S2. The industrial robot drives the mounting bracket to move downward. When the pressing head on the guide rod contacts the bumper, the second piston on the guide rod is driven to move upward in the fixing cylinder, and the fourth spring on the guide rod is compressed, and the gas in the fixing cylinder is compressed into the driving tube through the connecting hose.

[0018] S3. The compressed gas drives the first piston on the driving rod to move in the driving tube, so that the moving disc moves on the driving tube, and the bristles on the cleaning brush clean the adsorption surface of the bumper.

[0019] S4. The cleaning brush rotates on the arc-shaped rod during the downward movement of the mounting bracket, and the bristles on the cleaning brush are always in contact with the surface of the bumper through the third spring on the arc-shaped rod.

[0020] S5. Then, control the vacuum suction cup to adsorb the surface of the bumper.

[0021] S6. Then, the industrial robot transfers the adsorbed bumper to a corresponding position;

[0022] S7, then, the vacuum suction cup stops adsorbing the surface of the bumper, and then the industrial robot drives the mounting frame to move upward;

[0023] S8. During the upward movement of the mounting frame, the guide rod extends from the fixed tube under the action of spring four, the drive rod extends from the drive tube under the action of spring two, and the cleaning brush rotates to the lower side under the action of spring three on the arc rod.

[0024] The beneficial effects achieved by the present invention are:

[0025] The present application uses an industrial robot to move a pick-and-place mechanism and a cleaning mechanism to the position of the bumper to be picked up and placed, and when the mounting frame moves downward, the pressure head on the guide rod contacts the bumper, driving piston 2 on the guide rod to move upward in the fixed cylinder, and compressing the gas in the fixed cylinder into the drive tube through a connecting hose, and the compressed gas drives piston 1 on the drive rod to move in the drive tube, thereby causing the movable plate to move on the drive tube, and the bristles on the cleaning brush clean the adsorption surface of the bumper, and the cleaning brush performs adaptive rotation on the arc rod during the downward movement of the mounting frame, and the bristles on the cleaning brush are kept in contact with the surface of the bumper at all times through spring 3 on the arc rod, so that the dust and impurities on the surface of the bumper are cleaned more efficiently and thoroughly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 It is a front view of the mounting frame, the taking and placing mechanism and the cleaning mechanism of the present invention.

[0028] Figure 3 It is a top view of the mounting frame, the pick-and-place mechanism and the cleaning mechanism of the present invention.

[0029] Figure 4 It is a schematic diagram of the structure of the pick-up and place mechanism and the cleaning mechanism of the present invention.

[0030] Figure 5 It is a schematic diagram of the structure of the movable plate and the cleaning brush of the present invention.

[0031] Figure 6 It is a schematic structural diagram of the driving rod, piston 1, baffle plate and support rod of the present invention.

[0032] Figure 7 It is a schematic diagram of the structure of the guide rod, piston 2 and pressure head of the present invention.

[0033] In the figure, 1. industrial robot; 11. fixing frame; 2. mounting frame; 21. supporting rod; 22. connecting rod; 23. mounting plate; 231. weight reduction hole; 24. fixing plate; 3. picking and placing mechanism; 31. adjusting block; 311. connecting plate; 312. handle; 32. tightening screw; 33. vacuum suction cup; 34. spring one; 35. nut; 4. cleaning mechanism; 41. driving pipe; 42. air outlet; 43. fixing plate; 44. driving rod; 441. piston one; 442. baffle plate; 443. spring two; 45. moving plate; 451. supporting rod; 452. groove; 453. arc rod; 454. spring three; 46. cleaning brush; 47. fixing cylinder; 48. guide rod; 481. piston two; 482. pressure head; 483. spring four; 49. connecting hose. DETAILED DESCRIPTION

[0034] The specific implementation modes of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention.

[0035] Embodiment 1

[0036] like Figure 1-7 As shown, this embodiment provides an automatic pick-and-place device for automobile plastic bumpers, comprising an industrial robot 1, a mounting frame 2, a pick-and-place mechanism 3 and a cleaning mechanism 4, wherein the industrial robot 1 is mounted on a fixing frame 11 on the side of a processing device through a base, the mounting frame 2 is arranged on the end effector of the industrial robot 1, the pick-and-place mechanism 3 is arranged on the mounting frame 2 and is used to adsorb the bumper to be transferred, and the cleaning mechanism 4 is arranged on the mounting frame 2 and is used to clean the position on the bumper to be adsorbed.

[0037] It should be noted that the mounting frame 2 includes a support rod 21 and a fixed plate 24. There are two support rods 21. A connecting rod 22 is provided between the lower ends of the two support rods 21. A mounting plate 23 is provided between the tops of the two support rods 21. Weight reduction holes 231 are symmetrically provided on both sides of the mounting plate 23. The fixed plate 24 is arranged on the mounting plate 23 and connected to the end effector of the industrial robot 1.

[0038] In addition, the pick-and-place mechanism 3 includes an adjusting block 31, a vacuum suction cup 33 and a spring 34. The adjusting block 31 is provided with two and is rotatably connected to the two sides of the connecting rod 22. The adjusting block 31 is abutted against the connecting rod 22 through a tightening screw 32 threaded thereon. The air pipe on the vacuum suction cup 33 is slidably connected to the adjusting block 31. The spring 34 is sleeved on the air pipe of the vacuum suction cup 33 and is located between the adjusting block 31 and the suction cup body of the vacuum suction cup 33. A nut 35 is threadedly connected to the air pipe of the vacuum suction cup 33.

[0039] In addition, the cleaning mechanism 4 includes a driving tube 41, a spring 443, a cleaning brush 46 and a fixed tube 47. The driving tube 41 is provided with two and symmetrically arranged on both sides of the support rod 21. The two ends of each driving tube 41 are respectively connected to the two support rods 21 through a fixed plate 43. The two ends of the driving tube 41 are respectively slidably connected with a driving rod 44. The inner end of the driving rod 44 is provided with a piston 441 slidably connected to the driving tube 41, and the outer end of the driving rod 44 is provided with a baffle 442. The spring 443 is sleeved on the driving rod 44 and is located between the baffle 442 and the driving tube 41. The two ends of the driving tube 41 are respectively slidably connected with a moving disk 45.

[0040] The baffle plate 442 is connected to the movable plate 45 via a plurality of supporting rods 451, and the movable plate 45 is limited by a fixed plate 43 between two supporting rods 451, so as to prevent the movable plate 45 from driving the cleaning brush 46 to rotate away from the surface of the bumper at will;

[0041] The cleaning brush 46 is arranged below the vacuum suction cup 33, and the upper end of the cleaning brush 46 is slidably connected to the arc rod 453 in the groove 452 of the movable disk 45, and the arc rod 453 is sleeved with a spring three 454 located between the cleaning brush 46 and the upper wall of the groove 452, and the fixed cylinder 47 corresponds to the cleaning brush 46 one by one and the lower end of the fixed cylinder 47 is slidably connected with a guide rod 48, the inner end of the guide rod 48 is provided with a piston two 481 slidably connected to the fixed cylinder 47, and the outer end of the guide rod 48 is provided with a pressure head 482, and the guide rod 48 is sleeved with a spring four 483 located between the fixed cylinder 47 and the pressure head 482, and the fixed cylinder 47 is respectively connected to the end of the driving tube 41 through a connecting hose 49, and an air outlet 42 is provided in the middle of the driving tube 41, so that excess gas is discharged to the outside through the air outlet 42.

[0042] It should be noted that a connecting plate 311 with an arc structure is provided between the two adjustment blocks 31 on the same connecting rod 22 , and a handle 312 is provided on the side of the connecting plate 311 , which facilitates the rotation of the vacuum suction cup 33 when adjusting the angle.

[0043] Embodiment 2

[0044] The present embodiment provides an automatic pick-and-place device for automobile plastic bumpers, comprising an industrial robot 1, a mounting frame 2, a pick-and-place mechanism 3 and a cleaning mechanism 4, wherein the industrial robot 1 is mounted on a fixing frame 11 on the side of a processing device through a base, the mounting frame 2 is arranged on the end effector of the industrial robot 1, the pick-and-place mechanism 3 is arranged on the mounting frame 2 and is used to adsorb the bumper to be transferred, and the cleaning mechanism 4 is arranged on the mounting frame 2 and is used to clean the position on the bumper to be adsorbed.

[0045] It should be noted that the mounting bracket 2 includes a support rod 21 and a fixing plate 24. There are two support rods 21, which are in a "U" - shaped structure with the opening facing downwards. There is a connecting rod 22 between the lower ends of the two support rods 21, and a mounting plate 23 between the tops of the two support rods 21. Weight - reducing holes 231 are symmetrically arranged on both sides of the mounting plate 23. The fixing plate 24 is arranged on the mounting plate 23 and is connected to the end - effector of the industrial robot 1.

[0046] In addition, the picking - and - placing mechanism 3 includes an adjusting block 31, a vacuum suction cup 33 and a first spring 34. There are two adjusting blocks 31, which are rotatably connected to both sides of the connecting rod 22. The adjusting block 31 abuts against the connecting rod 22 through a tightening screw 32 threadedly connected thereto. The air pipe on the vacuum suction cup 33 is slidably connected to the adjusting block 31. The first spring 34 is sleeved on the air pipe of the vacuum suction cup 33 and is located between the adjusting block 31 and the suction body of the vacuum suction cup 33. A nut 35 is threadedly connected to the air pipe of the vacuum suction cup 33.

[0047] Furthermore, the cleaning mechanism 4 includes a driving pipe 41, a second spring 443, a cleaning brush 46 and a fixing cylinder 47. There are two driving pipes 41, which are symmetrically arranged on both sides of the support rod 21. Both ends of each driving pipe 41 are connected to the two support rods 21 through fixing plates 43 respectively. Driving rods 44 are slidably connected to both ends of the driving pipe 41 respectively. A first piston 441 slidably connected to the driving pipe 41 is arranged at the inner end of the driving rod 44, and a retaining disc 442 is arranged at the outer end of the driving rod 44. The second spring 443 is sleeved on the driving rod 44 and is located between the retaining disc 442 and the driving pipe 41. Moving discs 45 are slidably connected to both ends of the driving pipe 41 respectively;

[0048] The retaining disc 442 and the moving disc 45 are connected by a number of support rods 451. The moving disc 45 is limited by the fixing plate 43 between two of the support rods 451 to prevent the moving disc 45 from driving the cleaning brush 46 to rotate randomly away from the surface of the bumper;

[0049] The cleaning brush 46 is arranged below the vacuum suction cup 33 for cleaning. The upper end of the cleaning brush 46 is slidably connected to an arc - shaped rod 453 in a groove 452 of the moving disc 45. A third spring 454 is sleeved on the arc - shaped rod 453 and is located between the cleaning brush 46 and the upper wall of the groove 452. The fixing cylinder 47 corresponds to the cleaning brush 46 one by one, and a guide rod 48 is slidably connected to the lower end thereof. A second piston 481 slidably connected to the fixing cylinder 47 is arranged at the inner end of the guide rod 48, and a pressing head 482 is arranged at the outer end of the guide rod 48. A fourth spring 483 is sleeved on the guide rod 48 and is located between the fixing cylinder 47 and the pressing head 482. The fixing cylinder 47 is respectively connected to the end of the driving pipe 41 through a connecting hose 49. An air outlet hole 42 is arranged in the middle of the driving pipe 41, so as to discharge the redundant gas to the outside through the air outlet hole 42.

[0050] It should be noted that a connecting plate 311 with an arc structure is provided between the two adjustment blocks 31 on the same connecting rod 22 , and a handle 312 is provided on the side of the connecting plate 311 , which facilitates the rotation of the vacuum suction cup 33 when adjusting the angle.

[0051] Specific implementation and principle:

[0052] S1, using the industrial robot 1 to move the mounting frame 2 and the pick-up and placement mechanism 3 and the cleaning mechanism 4 thereon to the top of the bumper to be picked up and placed;

[0053] S2, the industrial robot 1 drives the mounting frame 2 to move downward, and when the pressure head 482 on the guide rod 48 contacts the bumper, the piston 2 481 on the guide rod 48 moves upward in the fixed cylinder 47, and the spring 483 on the guide rod 48 is compressed, and the gas in the fixed cylinder 47 is compressed into the driving tube 41 through the connecting hose 49;

[0054] S3, the compressed gas drives the piston 441 on the driving rod 44 to move in the driving tube 41, so that the moving plate 45 moves on the driving tube 41, and the bristles on the cleaning brush 46 clean the adsorption surface of the bumper;

[0055] S4, the cleaning brush 46 rotates on the arc rod 453 during the downward movement of the mounting frame 2, and the bristles on the cleaning brush 46 are constantly in contact with the surface of the bumper through the spring 3 454 on the arc rod 453;

[0056] S5, then, control the vacuum suction cup 33 to adsorb the surface of the bumper;

[0057] S6. Then, the industrial robot 1 transfers the adsorbed bumper to a corresponding position;

[0058] S7, then, the vacuum suction cup 33 stops adsorbing the surface of the bumper, and then the industrial robot 1 drives the mounting frame 2 to move upward;

[0059] S8. During the upward movement of the mounting frame 2, the guide rod 48 extends from the fixing tube 47 under the action of the spring four 483, the driving rod 44 extends from the driving tube 41 under the action of the spring two 443, and the cleaning brush 46 rotates to the lower side under the action of the spring three 454 on the arc rod 453.

[0060] In summary, the present application drives the cleaning brush 46 to move through high-pressure gas so that the bristles on the cleaning brush 46 clean the adsorption surface of the bumper. The cleaning brush 46 adaptively rotates on the arc rod 453 during the downward movement of the mounting frame 2, and the spring three 454 on the arc rod 453 ensures that the bristles on the cleaning brush 46 are always in contact with the surface of the bumper, so that the dust and impurities on the surface of the bumper can be cleaned more efficiently and thoroughly.

[0061] The above-described embodiments of the present invention do not constitute a limitation on the protection scope of the present invention. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An automatic pick-up and placement device for automobile plastic bumpers, characterized in that: The invention comprises an industrial robot (1), a mounting frame (2), a pick-and-place mechanism (3) and a cleaning mechanism (4), wherein the industrial robot (1) is mounted on a fixing frame (11) on the side of a processing device via a base, and the mounting frame (2) is arranged on an end effector of the industrial robot (1); The pick-and-place mechanism (3) is arranged on the mounting frame (2) and is used to absorb the bumper to be transferred; The cleaning mechanism (4) is arranged on the mounting frame (2) and is used to clean the position to be adsorbed on the bumper.

2. The automatic pick-up and placement device for automobile plastic bumpers according to claim 1 is characterized in that: The mounting frame (2) comprises a support rod (21) and a fixing plate (24), wherein two support rods (21) are provided, a connecting rod (22) is provided between the lower ends of the two support rods (21), a mounting plate (23) is provided between the tops of the two support rods (21), and the fixing plate (24) is provided on the mounting plate (23) and connected to the end effector of the industrial robot (1).

3. The automatic pick-up and placement device for automobile plastic bumpers according to claim 2 is characterized in that: The pick-and-place mechanism (3) comprises an adjusting block (31), a vacuum suction cup (33) and a spring (34); the adjusting block (31) is provided with two and is rotatably connected to the two sides of the connecting rod (22); the adjusting block (31) is in contact with the connecting rod (22) via a tightening screw (32) threadedly connected thereto; the air pipe on the vacuum suction cup (33) is slidably connected to the adjusting block (31); the spring (34) is sleeved on the air pipe of the vacuum suction cup (33) and is located between the adjusting block (31) and the suction cup body of the vacuum suction cup (33); and a nut (35) is threadedly connected to the air pipe of the vacuum suction cup (33).

4. The automatic pick-up and placement device for automobile plastic bumpers according to claim 3 is characterized in that: The cleaning mechanism (4) includes a drive tube (41), a second spring (443), a cleaning brush (46) and a fixed cylinder (47). There are two drive tubes (41) which are symmetrically arranged on both sides of the support rod (21). Both ends of each drive tube (41) are connected to the two support rods (21) through fixing plates (43). Slide rods (44) are respectively slidably connected to both ends of the drive tube (41). An inner end of the slide rod (44) is provided with a first piston (441) slidably connected to the drive tube (41). An outer end of the slide rod (44) is provided with a retaining disc (442). The second spring (443) is sleeved on the slide rod (44) and is located between the retaining disc (442) and the drive tube (41). Moving discs (45) are respectively slidably connected to both ends of the drive tube (41). The retaining disc (442) and the moving disc (45) are connected through a number of support rods (451). The cleaning brush (46) is arranged below the vacuum suction cup (33). An upper end of the cleaning brush (46) is slidably connected to an arc-shaped rod (453) in a groove (452) of the moving disc (45). A third spring (454) is sleeved on the arc-shaped rod (453) and is located between the cleaning brush (46) and the upper wall of the groove (452). The fixed cylinder (47) corresponds to the cleaning brush (46) one by one, and a guide rod (48) is slidably connected to a lower end thereof. An inner end of the guide rod (48) is provided with a second piston (481) slidably connected to the fixed cylinder (47). An outer end of the guide rod (48) is provided with a pressing head (482). A fourth spring (483) is sleeved on the guide rod (48) and is located between the fixed cylinder (47) and the pressing head (482). The fixed cylinder (47) is respectively connected to an end of the drive tube (41) through a connecting hose (49). An air outlet hole (42) is provided in the middle of the drive tube (41).

5. The automatic pick-up and placement device for automobile plastic bumpers according to claim 2 is characterized in that: The support rod (21) has a "U"-shaped structure with the opening facing downward.

6. The automatic pick-up and placement device for automobile plastic bumpers according to claim 3 is characterized in that: An arc-shaped connecting plate (311) is provided between two adjusting blocks (31) on the same connecting rod (22).

7. The automatic pick-up and placement device for automobile plastic bumpers according to claim 6 is characterized in that: A handle (312) is provided on a side surface of the connecting plate (311).

8. The automatic pick-up and placement device for automobile plastic bumpers according to claim 2 is characterized in that: Weight-reducing holes (231) are symmetrically provided on both sides of the mounting plate (23).

9. The method for automatically placing and picking up a plastic bumper of an automobile according to any one of claims 1 to 8, characterized in that: It includes the following steps: S1. Move the mounting frame (2) above the bumper to be picked up or placed by the industrial robot (1); S2. The industrial robot (1) drives the mounting frame (2) to move downward. When the pressing head (482) on the guide rod (48) contacts the bumper, it drives the second piston (481) on the guide rod (48) to move upward in the fixed cylinder (47). The fourth spring (483) on the guide rod (48) is compressed, and the gas in the fixed cylinder (47) is compressed into the drive tube (41) through the connecting hose (49); S3. The compressed gas drives the first piston (441) on the slide rod (44) to move in the drive tube (41), so that the moving disc (45) moves on the drive tube (41), and the bristles on the cleaning brush (46) clean the adsorption surface of the bumper; S4, the cleaning brush (46) rotates on the arc rod (453) during the downward movement of the mounting frame (2), and the bristles on the cleaning brush (46) are constantly in contact with the surface of the bumper through the spring three (454) on the arc rod (453); S5, then, controlling the vacuum suction cup (33) to absorb the surface of the bumper; S6. Then, the industrial robot (1) transfers the adsorbed bumper to a corresponding position; S7, then, the vacuum suction cup (33) stops adsorbing the surface of the bumper, and then the industrial robot (1) drives the mounting frame (2) to move upward; S8. During the upward movement of the mounting frame (2), the guide rod (48) extends from the fixing tube (47) under the action of the spring four (483), the driving rod (44) extends from the driving tube (41) under the action of the spring two (443), and the cleaning brush (46) rotates to the lower side under the action of the spring three (454) on the arc rod (453).

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