A robotic arm for spraying paint on the bottom of an elevator car

Abstract

This utility model discloses a robot for spraying the bottom of an elevator car, including a movable frame, a rotatable support mounted on the movable frame, and a sliding guide rail mounted on the rotatable support that can move back and forth. A rotating pressure rod is mounted on the sliding guide rail, and the front end of the sliding guide rail is used to mount a spray gun. The front end of the rotating pressure rod abuts against the spray gun, so that the rotation of the rotating pressure rod can link the opening and closing of the spray gun. This robot for spraying the bottom of an elevator car can easily enter the bottom of the elevator car for spraying operations without needing to lift or tilt the entire car, simplifying the production process and reducing equipment investment. During operation, the robot can maintain a stable distance between the spray gun and the workpiece, allowing the paint to evenly cover the surface of the parts, thereby ensuring the consistency and stability of the coating quality.

Description

Technical Field

[0001] This utility model belongs to the field of spraying equipment technology, specifically, it relates to a spraying robot for the bottom of an elevator car. Background Technology

[0002] An elevator car is a box-shaped space used by an elevator to carry and transport people and goods. It generally consists of a car frame and components such as the car floor, car walls, car top, and car doors installed on the car frame. The car frame is the load-bearing structure of the car, and it transmits the car's load to the traction steel cables. The car frame is generally welded from steel pipes, and other components are fixedly installed on the car frame to form a closed structure.

[0003] In the production of car cabins, surface coating of parts is an essential process. Due to the confined space and complex structure at the bottom of the cabin, coating is very difficult. It often requires lifting or tilting the entire cabin for manual coating, which not only requires specialized lifting equipment but also risks damaging the cabin structure. Furthermore, manual coating makes it difficult to control the distance between the spray gun and the workpiece, easily leading to uneven paint thickness, drips, and other quality problems. Additionally, it involves high labor intensity for workers, as the close proximity to the work surface is detrimental to labor protection. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing elevator car spraying processes by proposing a robotic arm for spraying the bottom of an elevator car. This robotic arm uses a combination of rotation and movement mechanisms, allowing the spray gun on the arm to enter the bottom of the elevator car for spraying operations under the operator's control, without the need to lift or flip the entire car.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A robotic arm for spraying the bottom of an elevator car includes a movable frame, a rotatable support mounted on the movable frame, and a sliding guide rail mounted on the rotatable support that can move back and forth. A rotating pressure rod is mounted on the sliding guide rail, and the front end of the sliding guide rail is used to mount a spray gun. The front end of the rotating pressure rod abuts against the spray gun so that the rotation of the rotating pressure rod can be linked to the opening and closing of the spray gun.

[0007] Furthermore, the rotary support includes a rotary platform with a central circular hole, a central shaft disposed in the central circular hole, and a pair of sliding supports disposed on the rotary platform, wherein:

[0008] A rolling bearing is provided between the outer wall of the central shaft and the inner wall of the central circular hole, and the central shaft is fixed to the moving frame so that the rotary platform can rotate relative to the central shaft and its fixed moving frame.

[0009] The pair of sliding supports are located on the front and rear sides of the rotary platform. The upper surface of the sliding support is provided with a downward sliding groove, and the sliding grooves on the two sliding supports are aligned with each other.

[0010] Furthermore, the groove includes an upper opening and a lower circular slot, and the width of the upper opening is smaller than the diameter of the circular slot.

[0011] Furthermore, the sliding guide rail includes a lower circular tube and an upper guide rail platform, which are connected to each other by a vertical connecting plate, wherein:

[0012] The circular tube is adapted to the circular slot of the slide groove, and the width of the connecting plate is adapted to the upper opening of the slide groove. The sliding guide rail passes through the slide grooves of the front and rear sliding supports of the rotary support by means of its circular tube and connecting plate, and can move back and forth relative to the rotary support.

[0013] An L-shaped control base plate is fixed to the rear of the guide rail platform. The horizontal surface of the L-shaped control base plate is fixed to the guide rail platform, and a motion control handle is fixed to the vertical surface.

[0014] Furthermore, the upper surface of the guide rail platform is provided with several bosses, and each boss has a through hole. The diameter of each through hole is the same and they are coaxial with each other. In addition, the axis of the through hole is parallel to the axis of the circular slot of the slide. The rotating pressure rod passes through the through hole of the boss of the guide rail platform.

[0015] Furthermore, the rotating pressure rod is a round rod with an outer diameter that matches the inner diameter of the through hole, and the front and rear ends of the round rod are respectively provided with a pressure rod cross arm and a pressure rod handle.

[0016] Preferably, the rotating pressure rod has an annular protrusion at both the front and rear, with its position corresponding to the outer side of the boss, to limit the rotation of the pressure rod.

[0017] Furthermore, the spray gun includes a spray gun body, a nozzle disposed above the spray gun body, and a paint can connected to the nozzle via a pipeline; wherein:

[0018] The rear end of the spray gun body is provided with a compressed air interface for inputting compressed air into the spray gun body, and a spray valve is provided on the compressed air passage of the spray gun body. A spray valve lever is provided above the spray valve for controlling the opening and closing of the spray valve.

[0019] The outer side of the cross arm at the front end of the rotating pressure rod abuts against the spray valve pressure rod of the spray gun.

[0020] Preferably, the circular tube of the sliding guide rail also serves as a channel for compressed air. Its front end is connected to the compressed air interface of the spray gun, and its rear end is set as a compressed air inlet connector. The compressed air inlet connector extends out of the vertical plate of the L-shaped control base plate and is used to connect the compressed air delivery pipeline.

[0021] According to this utility model, the movable frame is a square frame, which is welded together by two horizontal beams and two vertical beams. Support legs are welded to the bottom of the four corners of the movable frame, and a roller is installed at the bottom of each support leg through a roller axle, so that the movable frame can be moved to the desired position by means of the roller.

[0022] This utility model has the following beneficial effects:

[0023] 1. The elevator car bottom spraying robot of this utility model can easily enter the bottom of the elevator car to carry out spraying operations without lifting or flipping the entire car, which simplifies the production process and reduces equipment investment.

[0024] 2. When the robot arm at the bottom of the elevator car is working, it can ensure a stable distance between the spray gun and the workpiece, so that the paint can be evenly covered on the surface of the parts, thereby ensuring the consistency and stability of the coating quality.

[0025] 3. The robotic arm for spraying paint on the bottom of the elevator car can move back and forth and rotate, making it flexible and easy to operate. It also uses dual paint buckets, resulting in high work efficiency.

[0026] 4. There is sufficient distance between the worker and the spraying surface during operation, which can keep the operator away from the environment with health hazards. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall design of the robotic arm for spraying paint on the bottom of the elevator car according to this utility model.

[0028] Figure 2 This is a schematic diagram of the slewing support.

[0029] Figure 3 This is a schematic diagram of the sliding guide rail.

[0030] Figure 4 This is a schematic diagram of the rotating pressure bar.

[0031] Figure 5 This is a schematic diagram of the spray gun.

[0032] Drawing number explanation:

[0033] 1-Fixing bolt; 2-Rotating pressure rod; 3-Pressure rod cross arm; 4-Pressure rod handle; 5-Spray gun; 6-Control base plate; 7-Motion control handle; 8-Compressed air inlet connector; 9-Annular protrusion;

[0034] 10-Moving frame; 11-Crossbeam; 12-Longitudinal beam; 13-Outrigger; 14-Roller axle; 15-Roller;

[0035] 20-Slewing support; 21-Slewing platform; 22-Central circular hole; 23-Central shaft; 24-Sliding support; 25-Rolling bearing; 26-Protrusion; 27-Slide groove; 271-Upper opening; 272-Circular slot;

[0036] 30-Sliding guide rail; 31-Round tube; 32-Guide rail platform; 33-Connecting plate; 34-Boss; 35-Through hole; 36-Fixing hole; 37-L-shaped control base plate;

[0037] 40-Spray gun; 41-Spray gun body; 42-Nozzle; 43-Paint can; 44-Compressed air interface; 45-Spray valve; 46-Spray valve lever. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the following embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0039] like Figure 1 As shown, the elevator car bottom spraying robot of this utility model includes a movable frame 10, a rotary support 20 rotatably mounted on the movable frame 10, and a sliding guide rail 30 mounted on the rotary support 20 that can move back and forth. A rotating pressure rod 2 is mounted on the sliding guide rail 30. The front end of the sliding guide rail 30 is used to mount a spray gun 40. The front end of the rotating pressure rod 2 abuts against the spray gun 40 so that the rotation of the rotating pressure rod 2 can be linked to the opening and closing of the spray gun 40.

[0040] Furthermore, the movable frame 10 is preferably a square frame, which is welded together from two crossbeams 11 and two longitudinal beams 12. Support legs 13 are welded to the bottom of the four corners of the movable frame 10. Each support leg 13 is fitted with a roller 15 at its bottom via a roller shaft 14, so that the movable frame 10 can be moved to the desired position by means of the roller 15.

[0041] Combination Figure 2As shown, the rotary support 20 includes a rotary platform 21 with a central circular hole 22, a central shaft 23 disposed in the central circular hole 22, and a pair of sliding supports 24 disposed on the rotary platform 21. A rolling bearing 25 is provided between the outer wall of the central shaft 23 and the inner wall of the central circular hole 22. The central shaft 23 has a fixing hole (not shown) and is fixed to the movable frame 10 (crossbeam 11 or longitudinal beam 12) by fixing bolts 1, allowing the rotary platform 21 to rotate relative to the central shaft 23 and its fixed movable frame 10. The pair of sliding supports 24 are disposed on the front and rear sides of the rotary platform 21. Each sliding support 24 has a protrusion 26 connected to both sides and is fixed to the rotary platform 21 by fixing bolts 1 through fixing holes (not shown) on the protrusions 26. The upper surface of each sliding support 24 has a downward-facing groove 27, and the grooves 27 on the two sliding supports 24 are aligned with each other. Furthermore, the groove 27 includes an upper opening 271 and a lower circular slot 272, and the width of the upper opening 271 is smaller than the diameter of the circular slot 272.

[0042] like Figure 3 As shown, the sliding guide rail 30 includes a lower circular tube 31 and an upper guide rail platform 32, which are connected to each other by a vertical connecting plate 33. The circular tube 31 is adapted to the circular slot 272 of the slide groove 27, and the width of the connecting plate 33 is adapted to the upper opening 271 of the slide groove 27. This allows the sliding guide rail 30 to pass through the slide grooves 27 of the front and rear sliding supports 24 of the rotary support 20 via its circular tube 31 and connecting plate 33, and to move back and forth relative to the rotary support 20. Simultaneously, because the width of the upper opening 271 of the slide groove 27 is smaller than the diameter of the circular slot 272, the circular tube 31 is confined within the slide groove 27 and will not come out upwards. Figure 1 As shown, a fixing hole 36 is provided at the rear of the guide rail platform 32, and an L-shaped control base plate 37 is fixed thereon by fasteners, such as fixing bolts. The horizontal surface of the L-shaped control base plate 37 is fixed to the guide rail platform 32, and a motion control handle 7 is fixed to the vertical surface. In this way, by manually controlling the motion control handle 7, the sliding guide rail 30 can be moved back and forth, and the rotary platform 21 can be rotated left and right.

[0043] The upper surface of the guide rail platform 32 is provided with a plurality of protrusions 34, preferably three; each protrusion 34 is provided with a through hole 35, the diameter of each through hole 35 is the same and they are coaxial with each other, and the axis of the through hole 35 is parallel to the axis of the circular slot 272 of the slide groove 27.

[0044] Combination Figure 1 and Figure 4As shown, a rotating pressure rod 2 is inserted through the through hole 35 of the boss 34 of the guide rail platform 32. The rotating pressure rod 2 is a round rod with an outer diameter that matches the inner diameter of the through hole 35. A pressure rod cross arm 3 and a pressure rod handle 4 are respectively provided at the front and rear ends of the round rod 2. Furthermore, an annular protrusion 9 is provided at both the front and rear of the rotating pressure rod 2, with its position corresponding to the outer side of the boss 34, to limit the rotation of the pressure rod 2 and prevent it from dislodging from the boss 34.

[0045] like Figure 5 As shown, the spray gun 40 includes a spray gun body 41, a nozzle 42 disposed above the spray gun body 41, and a paint can 43 connected to the nozzle 42 via a pipeline. The spray gun body 41 has a compressed air inlet 44 at its rear end for inputting compressed air into the spray gun body 41, and a spray valve 45 is provided on the compressed air passage of the spray gun body 41. A spray valve lever 46 is located above the spray valve 45 for controlling its opening and closing. The nozzle 42 has a spray hole (not shown in the figure) at its center. The paint can 43 is preferably a combined paint can. The spray gun 40 can be any product known in the prior art.

[0046] Combination Figure 1 As shown, when the spray gun 40 is installed at the front end of the sliding guide rail 30, the outer side of the lever arm 3 at the front end of the rotating lever 2 is exactly abutted against the spray valve lever 46 of the spray gun 40. Thus, when the lever handle 4 is rotated, the lever 2 rotates in conjunction, causing the lever arm 3 to press down or lift up, thereby opening or closing the spray valve 45 through the spray valve lever 46. Preferably, the circular tube 31 of the sliding guide rail also serves as a compressed air channel. Its front end is connected to the compressed air interface 44 of the spray gun 40, and its rear end is a compressed air inlet connector 38. This compressed air inlet connector 38 extends through the vertical surface of the L-shaped control base plate 37 and is used to connect to the compressed air delivery pipeline, thus avoiding the need for additional external pipelines.

[0047] The working principle of the elevator car bottom spraying robot of this utility model is as follows:

[0048] The spray gun 40 is fixedly mounted on the front end of the sliding guide rail 30, while the rear end of the sliding guide rail 30 is fixed with an L-shaped control base plate 37 and a motion control handle 7. The sliding guide rail 30 is mounted on two sliding supports 24 on the rotary support 20 via a round tube 31 at its lower end. Since the sliding guide rail 30 can move back and forth relative to the rotary support 20, the operator can drive the spray gun 40 to move back and forth via the motion control handle 7. Because a rolling bearing 25 is installed between the rotary platform 21 on the rotary support 20 and the moving frame 10, the rotary platform 21 can rotate relative to the moving frame 10. Therefore, while the spray gun 40 moves back and forth, it can also rotate left and right with the sliding guide rail 30, so that the spray gun 40 covers the entire bottom of the elevator car. Using the rollers 15 on the moving frame support legs 13, the spraying robot is moved to the lower position of the elevator car to perform bottom spraying operations, without needing to lift or flip the elevator car.

[0049] During the spraying operation, paint is added to the paint can 43. The compressed air pipe is connected to the compressed air inlet connector 38 at the tail of the sliding guide rail 30. The bottom spraying robot of the elevator car is pushed into the bottom of the elevator car product to be sprayed through the roller 15 at its bottom. The pressure rod handle 4 is rotated, and the horizontal arm 3 at the front of the pressure rod 2 is rotated to press down the spraying valve pressure rod 46 on the spray gun 40, opening the spraying valve 45. Compressed air is sprayed out from the nozzle 42 of the spray gun 40. At the same time, due to the negative pressure, the paint in the paint can 43 is carried out and evenly sprayed onto the bottom of the elevator car.

[0050] During the construction process, the operator can flexibly adjust the position of the spray gun 40 as needed, and carry out construction at a certain distance outside the spraying operation area.

[0051] Although the present invention has been described in detail above through specific embodiments, it should be understood that the above description is only a preferred embodiment of the present invention. Those skilled in the art can make appropriate modifications, equivalent substitutions and improvements within the spirit and principles of the present invention, all of which should be included within the protection scope of the present invention.

Claims

1. A robotic arm for spraying paint on the bottom of an elevator car, characterized in that, The device includes a movable frame (10), a rotatable support (20) mounted on the movable frame (10), and a sliding guide rail (30) mounted on the rotatable support (20) that can move back and forth. A rotating pressure rod (2) is mounted on the sliding guide rail (30). The front end of the sliding guide rail (30) is used to mount a spray gun (40). The front end of the rotating pressure rod (2) abuts against the spray gun (40) so that the rotation of the rotating pressure rod (2) can be linked to the opening and closing of the spray gun (40).

2. The elevator car bottom spraying robot according to claim 1, characterized in that, The rotary support (20) includes a rotary platform (21) with a central circular hole (22), a central shaft (23) disposed in the central circular hole (22), and a pair of sliding supports (24) disposed on the rotary platform (21), wherein: A rolling bearing (25) is provided between the outer wall of the central shaft (23) and the inner wall of the central circular hole (22), and the central shaft (23) is fixed on the moving frame (10) so that the rotary platform (21) can rotate relative to the central shaft (23) and its fixed moving frame (10). The pair of sliding supports (24) are located on the front and rear sides of the rotary platform (21). The upper surface of the sliding support (24) is provided with a downward sliding groove (27), and the sliding grooves (27) on the two sliding supports (24) are aligned with each other.

3. The elevator car bottom spraying robot according to claim 2, characterized in that, The groove (27) includes an upper opening (271) and a lower circular slot (272), and the width of the upper opening (271) is smaller than the diameter of the circular slot (272).

4. The elevator car bottom spraying robot according to claim 3, characterized in that, The sliding guide rail (30) includes a lower circular tube (31) and an upper guide rail platform (32), which are connected to each other by a vertical connecting plate (33), wherein: The circular tube (31) is adapted to the circular slot (272) of the slide groove (27), and the width of the connecting plate (33) is adapted to the upper opening (271) of the slide groove (27). The sliding guide rail (30) passes through the slide groove (27) of the front and rear sliding supports (24) of the rotary support (20) by means of its circular tube (31) and connecting plate (33), and can move back and forth relative to the rotary support (20). An L-shaped control base plate (37) is fixed to the rear of the guide rail platform (32). The horizontal surface of the L-shaped control base plate (37) is fixed to the guide rail platform (32), and a motion control handle (7) is fixed to the vertical surface.

5. The elevator car bottom spraying robot according to claim 4, characterized in that, The upper surface of the guide rail platform (32) is provided with a number of bosses (34), and each boss (34) is provided with a through hole (35). The diameter of each through hole (35) is the same and they are coaxial with each other. Furthermore, the axis of the through hole (35) is parallel to the axis of the circular slot (272) of the slide groove (27). The rotating pressure rod (2) passes through the through hole (35) of the boss (34) of the guide rail platform (32).

6. The elevator car bottom spraying robot according to claim 5, characterized in that, The rotating pressure rod (2) is a round rod with an outer diameter that matches the inner diameter of the through hole (35). The front and rear ends of the round rod (2) are respectively provided with a pressure rod cross arm (3) and a pressure rod handle (4).

7. The elevator car bottom spraying robot according to claim 6, characterized in that, The rotating pressure rod (2) has an annular protrusion (9) at the front and rear, respectively, and its position corresponds to the outer side of the boss (34) to limit the rotation of the pressure rod (2).

8. The elevator car bottom spraying robot according to claim 6, characterized in that, The spray gun (40) includes a spray gun body (41), a nozzle (42) disposed above the spray gun body (41), and a paint can (43) connected to the nozzle (42) via a pipeline; wherein: The rear end of the spray gun body (41) is provided with a compressed air interface (44) for inputting compressed air into the spray gun body (41), and a spray valve (45) is provided on the compressed air passage of the spray gun body (41). A spray valve lever (46) is provided above the spray valve (45) for controlling the opening and closing of the spray valve (45). The outer side of the lever arm (3) at the front end of the rotating lever (2) abuts against the spray valve lever (46) of the spray gun (40).

9. The elevator car bottom spraying robot according to claim 8, characterized in that, The circular tube (31) of the sliding guide rail also serves as a channel for compressed air. Its front end is connected to the compressed air interface (44) of the spray gun (40), and its rear end is set as a compressed air inlet connector (38). The compressed air inlet connector (38) extends out of the vertical plate surface of the L-shaped control base plate (37) and is used to connect the compressed air delivery pipeline.

10. The elevator car bottom spraying robot according to claim 1, characterized in that, The movable frame (10) is a square frame, which is welded together by two horizontal beams (11) and two vertical beams (12). The bottom of the four corners of the movable frame (10) are all welded with legs (13). Each leg (13) is fitted with a roller (15) through a roller shaft (14) so ​​that the movable frame (10) can move with the help of the rollers (15).

Images