Mechanical hand for spraying paint on axle box of railway passenger car wheel shaft

Abstract

The utility model discloses a kind of mechanical hands for railway passenger car wheel axle box paint spraying, belong to the technical field of railway passenger car parts overhaul, including manipulator arm, grabbing mechanism and translation mechanism, grabbing mechanism includes the clamping chuck and driving chuck of being set in the inside of two vertical arm bottom, clamping chuck is driven telescopic by pusher assembly, driving chuck is driven rotation by rotary drive mechanism, clamping chuck and driving chuck are used to clamp axle box. The clamping chuck is driven to be close to driving chuck by the pusher assembly set, until clamping chuck and driving chuck tightly clamp axle box, the fixation of axle box is completed, by the translation cylinder and range mechanism set, axle box is transported to paint spraying room, then the paint spraying robot in paint spraying room carries out paint spraying to axle box surface, simultaneously, driving chuck is driven rotation by the rotary drive mechanism set, drive axle box slowly rotate, so that paint spraying robot can quickly complete paint spraying to axle box.

Description

Technical Field

[0001] This utility model relates to the field of railway passenger car parts maintenance technology, and more specifically, to a robotic arm for painting railway passenger car wheel axle boxes. Background Technology

[0002] The axle box of a railway passenger car is a key component of the railway passenger car transmission system. Its surface painting treatment is of great significance for improving the corrosion resistance and wear resistance of the axle box, and ensuring the safe and stable operation of railway passenger cars. Currently, axle box painting is mostly done manually, with workers holding spray guns to apply the paint. This method has many drawbacks: firstly, manual painting is inefficient, labor-intensive, and the painting quality is greatly affected by the worker's skill level, easily resulting in uneven painting, missed areas, and other problems, making it difficult to guarantee the consistency and reliability of the axle box surface coating; secondly, the harmful gases generated during the painting process pose a significant health hazard to workers, resulting in a poor working environment safety.

[0003] With the development of automation technology, some companies have begun to use robotic arms in conjunction with painting robots for axle box painting operations. However, existing robotic arms can only perform the functions of grasping and transferring axle boxes. When the painting robot is working, it cannot drive the axle box to rotate to adjust the corresponding angle, which makes it difficult for the painting robot to perform all-round, no-dead-angle painting treatment on the axle box. There is still a problem of incomplete paint coverage, which affects the corrosion resistance and service life of the axle box and cannot meet the high-quality requirements of railway passenger cars for axle boxes.

[0004] Therefore, in view of the shortcomings of the existing technology, there is an urgent need for a robotic arm that can grasp and transfer axle boxes and can work with a painting robot to drive the axle boxes to rotate and adjust the angle, so as to improve the efficiency and quality of axle box painting and ensure the performance reliability of railway passenger car wheel axle boxes.

[0005] In view of this, the present invention is proposed to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this utility model is to provide a robotic arm for painting axle boxes of railway passenger cars, so as to solve the technical problem that the existing robotic arms for painting axle boxes are not easy to rotate to adjust the angle.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A robotic arm for painting railway passenger car wheel axle boxes includes: The robotic arm includes two vertically arranged vertical arms and a horizontal arm connected between the two vertical arms. The horizontal arm is slidably mounted on the frame of the paint booth. The gripping mechanism includes a clamping plate and a driving plate disposed on the inner side of the bottom of two vertical arms. The clamping plate is driven to extend and retract by a pushing component, and the driving plate is driven to rotate by a rotation driving mechanism. The clamping plate and the driving plate are used to clamp the axle box. The translation mechanism includes a translation cylinder and a stroke doubling mechanism. The bottom of the stroke doubling mechanism is fixedly connected to the upper end of the robotic arm, and the translation cylinder drives the stroke doubling mechanism to move.

[0008] Furthermore, the pushing component includes a guide sleeve disposed at the bottom of a vertical arm, a slidable guide shaft disposed inside the guide sleeve, a clamping pressure plate fixedly connected to the guide shaft, and a clamping oil cylinder disposed inside the guide sleeve at one end opposite to the clamping pressure plate, the output end of the clamping oil cylinder being fixedly connected to the guide shaft.

[0009] Furthermore, the bottom of the guide shaft has a mating groove, and the bottom of the guide sleeve is provided with a positioning bolt. The upper end of the positioning bolt extends into the mating groove and slides in fit with the mating groove.

[0010] Furthermore, the rotary drive mechanism includes a mounting sleeve disposed at the bottom of another vertical arm. A rotatable drive shaft is coaxially disposed inside the mounting sleeve. The end of the drive shaft near the clamping pressure plate is fixedly connected to the drive pressure plate. A coupling is disposed at the end of the mounting sleeve opposite to the drive pressure plate. The left end of the coupling is fixedly connected to the drive shaft, and the right end of the coupling is connected to a reducer. The reducer is driven by a drive motor.

[0011] Furthermore, a zero-position sensor is also installed on the mounting sleeve to detect the horizontal position of the axle box.

[0012] Furthermore, both the clamping plate and the driving plate have circular bosses on opposite sides, and the two circular bosses are detachably connected to the inner walls at both ends of the shaft box.

[0013] Furthermore, the double-stroke mechanism includes a lower translation rack fixedly connected to the upper end of the robotic arm. The lower translation rack is fixedly mounted on the horizontal arm. A double-speed gear meshes on the lower translation rack, and an upper translation rack meshes on the double-speed gear. The upper translation rack is fixedly connected to the frame of the paint booth, and the double-speed gear is connected to the translation cylinder.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: The clamping plate is driven by a push component to move closer to the drive plate until the clamping plate and the drive plate clamp the axle box, thus fixing the axle box. The axle box is then transported to the paint booth by a translation cylinder and a stroke doubling mechanism. The painting robot in the paint booth then paints the surface of the axle box. At the same time, the drive plate is driven to rotate by a rotary drive mechanism, which causes the axle box to rotate slowly, so that the painting robot can quickly complete the painting of the axle box. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings: Figure 1 A schematic diagram of the structure of the robotic arm for painting axle boxes of railway passenger cars provided in this application embodiment.

[0016] Reference numerals: 1. Robotic arm; 2. Guide sleeve; 3. Guide shaft; 4. Positioning bolt; 5. Clamping plate; 6. Clamping cylinder; 7. Coupling; 8. Drive shaft; 9. Drive plate; 10. Zero-position sensor; 11. Drive motor; 12. Reducer; 13. Upper translation rack; 14. Translation cylinder; 15. Lower translation rack; 16. Speed ​​multiplier gear. Detailed Implementation

[0017] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0018] See Figure 1 As shown, a robotic arm for painting railway passenger car wheel axle boxes includes: a robotic arm 1, a gripping mechanism, and a translation mechanism. The robotic arm 1 includes two vertically arranged vertical arms and a horizontal arm connected between the two vertical arms. The horizontal arm is slidably mounted on the frame of the paint booth. The gripping mechanism includes a clamping plate 5 and a driving plate 9 disposed on the inner side of the bottom of the two vertical arms. The clamping plate 5 is driven to extend and retract by a pushing component, and the driving plate 9 is driven to rotate by a rotation driving mechanism. The clamping plate 5 and the driving plate 9 are used to clamp the axle box. The translation mechanism includes a translation cylinder 14 and a stroke doubling mechanism. The bottom of the stroke doubling mechanism is fixedly connected to the upper end of the robotic arm 1. The translation cylinder 14 drives the stroke doubling mechanism to move. After the clamping plate 5 and the driving plate 9 clamp the axle box, they simultaneously close the inner holes at both ends of the axle box to ensure that the interior is not contaminated by paint during the painting of the axle box.

[0019] It should be noted that a hydraulic lifting platform is provided below the clamping pressure plate 5 and the driving pressure plate 9. The support platform of the hydraulic lifting platform has multiple drive rollers, which are driven by a motor (the hydraulic lifting platform directly adopts existing technology, and this application does not describe the specific structure of the hydraulic lifting platform in detail). When the hydraulic lifting platform is lowered to the lowest position, conveyor belts are connected to both sides of the support platform along its length. The front conveyor belt transports the axle box to the support platform for painting, and the rear conveyor belt transports the painted axle box to the next process.

[0020] In the above scheme, before painting the axle box, the hydraulic lifting platform supports the axle box so that the axis of the axle box coincides with the axis of the clamping pressure plate 5 or the driving pressure plate 9. The clamping pressure plate 5 is driven to move closer to the driving pressure plate 9 by the set pushing component until the clamping pressure plate 5 and the driving pressure plate 9 clamp the axle box, thus completing the fixation of the axle box. The axle box is transported to the paint booth by the set translation cylinder 14 and the double stroke mechanism. Then, the painting robot in the paint booth paints the surface of the axle box. At the same time, the driving pressure plate 9 is driven to rotate by the set rotation drive mechanism, which drives the axle box to rotate slowly, so that the painting robot can quickly complete the painting of the axle box.

[0021] See some possible implementations. Figure 1 As shown, the pushing component includes a guide sleeve 2 disposed at the bottom of a vertical arm, a slidable guide shaft 3 disposed inside the guide sleeve 2, a clamping pressure plate 5 fixedly connected to the guide shaft 3, and a clamping cylinder 6 disposed inside the guide sleeve 2 at one end opposite to the clamping pressure plate 5, the output end of the clamping cylinder 6 being fixedly connected to the guide shaft 3.

[0022] In the above scheme, when clamping the axle box, the clamping cylinder 6 is started. The start of the clamping cylinder 6 drives the guide shaft 3 to extend through its output end. The extension of the guide shaft 3 drives the clamping pressure plate 5 to move in the direction of the driving pressure plate 9, thereby clamping the axle box.

[0023] See some possible implementations. Figure 1 As shown, the bottom of the guide shaft 3 has a mating groove, and the bottom of the guide sleeve 2 is provided with a positioning bolt 4. The upper end of the positioning bolt 4 extends into the mating groove and slides in the mating groove. The positioning bolt 4 and the mating groove are used to limit the guide shaft 3 and prevent the guide shaft 3 from rotating.

[0024] See some possible implementations. Figure 1 As shown, the rotary drive mechanism includes a mounting sleeve disposed at the bottom of another vertical arm. A rotatable drive shaft 8 is coaxially disposed inside the mounting sleeve. The end of the drive shaft 8 near the clamping pressure plate 5 is fixedly connected to the drive pressure plate 9. A coupling 7 is disposed at the end of the mounting sleeve opposite to the drive pressure plate 9. The left end of the coupling 7 is fixedly connected to the drive shaft 8, and the right end of the coupling 7 is connected to a reducer 12. The reducer 12 is driven by a drive motor 11.

[0025] In the above scheme, when the drive shaft box rotates, the control drive motor 11 starts, the drive motor 11 drives the output shaft of the reducer 12 to rotate, the output shaft of the reducer 12 rotates through the coupling 7 to drive the drive shaft 8 to rotate, the drive shaft 8 rotates to drive the drive pressure plate 9 to rotate, and the drive pressure plate 9 rotates to drive the shaft box to rotate.

[0026] See some possible implementations. Figure 1As shown, a zero-position sensor 10 is also installed on the mounting sleeve to detect the horizontal position of the axle box.

[0027] See some possible implementations. Figure 1 As shown, the clamping pressure plate 5 and the driving pressure plate 9 each have a circular boss on one side, and the two circular bosses are detachably connected to the inner walls of both ends of the shaft box.

[0028] In the above scheme, when clamping the axle box, two circular bosses extend into the inner walls of both ends of the axle box to prevent the axle box from sliding down due to gravity and to improve the stability of clamping the axle box.

[0029] See some possible implementations. Figure 1 As shown, the multiplication mechanism includes a lower translation rack 15 fixedly connected to the upper end of the robotic arm 1. The lower translation rack 15 is fixedly mounted on the horizontal arm. A multiplication gear 16 meshes on the lower translation rack 15, and an upper translation rack 13 meshes on the multiplication gear 16. The upper translation rack 13 is fixedly connected to the frame of the paint booth. The multiplication gear 16 is connected to a translation cylinder 14. The fixed end of the translation cylinder 14 is mounted on the frame of the paint booth. A gear seat is mounted on the multiplication gear 16, and the gear seat is fixedly connected to the output end of the translation cylinder 14.

[0030] In the above scheme, when painting the axle box, the translation cylinder 14 is first started, so that the output end of the translation cylinder 14 extends. The output end of the translation cylinder 14 extends and drives the speed doubling gear 16 to slide to the right through the gear seat. During this process, the speed doubling gear 16 meshes with the translation upper rack 13 and the translation lower rack 15, driving the translation lower rack 15 to slide to the right. The sliding speed of the translation lower rack 15 is greater than the extension and retraction speed of the output end of the translation cylinder 14, thereby increasing the distance that the robotic arm 1 slides to the right, and driving the axle box into the paint booth for painting.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A robotic arm for painting axle boxes of railway passenger car wheels, characterized in that, include: The robotic arm (1) includes two vertically arranged vertical arms and a horizontal arm connected between the two vertical arms. The horizontal arm is slidably arranged on the frame of the spray booth. The gripping mechanism includes a clamping plate (5) and a driving plate (9) disposed on the inner side of the bottom of two vertical arms. The clamping plate (5) is driven to extend and retract by a pushing component, and the driving plate (9) is driven to rotate by a rotation driving mechanism. The clamping plate (5) and the driving plate (9) are used to clamp the axle box. The translation mechanism includes a translation cylinder (14) and a stroke doubling mechanism. The bottom of the stroke doubling mechanism is fixedly connected to the upper end of the robotic arm (1). The translation cylinder (14) drives the stroke doubling mechanism to move.

2. The robotic arm for painting railway passenger car wheel axle boxes according to claim 1, characterized in that, The pushing assembly includes a guide sleeve (2) disposed at the bottom of a vertical arm, a slidable guide shaft (3) disposed inside the guide sleeve (2), a clamping pressure plate (5) fixedly connected to the guide shaft (3), a clamping cylinder (6) disposed inside the guide sleeve (2) at one end away from the clamping pressure plate (5), and the output end of the clamping cylinder (6) fixedly connected to the guide shaft (3).

3. The robotic arm for painting railway passenger car wheel axle boxes according to claim 2, characterized in that, The bottom of the guide shaft (3) has a mating groove, and the bottom of the guide sleeve (2) is provided with a positioning bolt (4). The upper end of the positioning bolt (4) extends into the mating groove and slides in the mating groove.

4. The robotic arm for painting railway passenger car wheel axle boxes according to claim 2, characterized in that, The rotary drive mechanism includes a mounting sleeve disposed at the bottom of another vertical arm. A rotatable drive shaft (8) is coaxially disposed inside the mounting sleeve. The end of the drive shaft (8) near the clamping pressure plate (5) is fixedly connected to the drive pressure plate (9). A coupling (7) is disposed at the end of the mounting sleeve away from the drive pressure plate (9). The left end of the coupling (7) is fixedly connected to the drive shaft (8). A reducer (12) is connected to the right end of the coupling (7). The reducer (12) is driven by a drive motor (11).

5. The robotic arm for painting railway passenger car wheel axle boxes according to claim 4, characterized in that, The mounting sleeve is also equipped with a zero-position sensor (10) to detect the horizontal position of the axle box.

6. The robotic arm for painting railway passenger car wheel axle boxes according to claim 5, characterized in that, The clamping plate (5) and the driving plate (9) each have a circular boss on one side, and the two circular bosses are detachably connected to the inner walls of both ends of the shaft box.

7. The robotic arm for painting railway passenger car wheel axle boxes according to claim 1, characterized in that, The multiplication mechanism includes a lower translation rack (15) fixedly connected to the upper end of the robotic arm (1). The lower translation rack (15) is fixedly mounted on the horizontal arm. A speed multiplier gear (16) meshes on the lower translation rack (15). A higher translation rack (13) meshes on the speed multiplier gear (16). The higher translation rack (13) is fixedly connected to the frame of the paint booth. The speed multiplier gear (16) is connected to the translation cylinder (14).

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