Rail wheel surface spraying device

Abstract

The invention relates to the technical field of track wheel production and manufacturing, and discloses a track wheel surface spraying device which comprises a fixing seat, a rotating shaft is rotatably mounted on the inner bottom wall of the fixing seat, a supporting plate is slidably mounted on the outer side of the top end of the rotating shaft and used for supporting a to-be-sprayed wheel, and a mounting cavity is formed in the fixing seat. A motor is fixedly mounted on the inner bottom wall of the mounting cavity, and a driving shaft is fixedly mounted at the output end of the motor. The rotating speed of the rotating shaft is changed through the slide rheostat and the coupler, the rotating speed of the wheel during spraying is changed according to different types of wheels, uniform coating is guaranteed, coating is evenly distributed on the surface of the wheel, uneven attachment of the coating in the rotating process is avoided, and the coating quality is improved. And the spraying quality of the wheel is remarkably improved, and the safety and reliability of the wheel in long-term use are ensured.

Description

Technical Field

[0001] The present application relates to the technical field of rail wheel production and manufacturing, and in particular to a rail wheel surface spraying device. Background Art

[0002] In the process of producing rail wheels, spraying is an important process link, which is used to improve the wear resistance, corrosion resistance and service life of the wheels. The quality of the spray layer directly affects the performance of the wheel, so it is crucial to ensure the uniformity of the spraying effect. Different types of rail systems correspond to different types of wheel designs. Due to the different use environments and functional requirements of various types of rail wheels, their weights and sizes are also different. Generally speaking, the weight of the wheel is closely related to its diameter, material and structural design, and these factors directly affect the production process of the wheel.

[0003] Generally speaking, wheels are made of high-strength steel, which has excellent wear resistance and load-bearing capacity, so in most cases, the weight of the wheel is proportional to its size. In other words, the heavier the wheel, the larger its diameter is usually, and the surface area of ​​the wheel will also increase accordingly.

[0004] As the size and weight of the wheel increase, the corresponding spray coating needs to be evenly covered on a wider surface due to the increase in wheel surface area to ensure the protective effect of the coating. Therefore, the rotation speed of the wheel also needs to be adjusted during spraying. Specifically, larger wheels require a lower rotation speed to help ensure uniform distribution of the paint and avoid uneven coating or incomplete spraying due to too fast rotation. For smaller wheels, the rotation speed can be appropriately increased to improve spraying efficiency and ensure that the coverage quality of the coating is not affected. Summary of the invention

[0005] The present application proposes a rail wheel surface spraying device, which has the advantages of changing the rotation speed of the wheel during spraying according to different types of wheels to ensure uniform coverage of the coating so that the coating is evenly distributed on the surface of the wheel, which helps to avoid uneven adhesion of the coating during rotation, resulting in uneven coating thickness, significantly improving the spraying quality of the wheel, and ensuring the safety and reliability of the wheel in long-term use. It is used to solve the problem of uneven spraying and poor coverage quality caused by the mismatch between the wheel rotation speed and the wheel surface area when spraying rail wheels.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a rail wheel surface spraying device, comprising a fixed seat, a rotating shaft is rotatably installed on the inner bottom wall of the fixed seat, a support plate is slidably installed on the top outer side of the rotating shaft, and is used to provide support for the wheel to be sprayed, an installation cavity is opened inside the fixed seat, a motor is fixedly installed on the inner bottom wall of the installing cavity, a driving shaft is fixedly installed on the output end of the motor, a coupling is fixedly installed on the end of the driving shaft away from the motor, the bottom end of the rotating shaft movably passes through the interlayer between the fixed seat and the installing cavity and is fixedly connected to the output end of the coupling, a support ring is slidably installed on the top outer side of the rotating shaft, and the bottom wall of the support plate and the support ring The top wall of the support ring is fixedly connected, an adjustment plate is fixedly installed on the outer side of the bottom end of the support ring, a mounting groove is also opened inside the fixing seat, a mounting box is fixedly installed inside the mounting groove, a sliding rheostat is fixedly installed on the inner side wall of the mounting box, the sliding rheostat includes a slider slidably installed at the opening of the mounting box, the end of the slider away from the mounting box is fixedly connected to the adjustment plate, the sliding rheostat is electrically connected to a DC power supply and constitutes a transmission ratio circuit, during the sliding process of the slider toward the mounting cavity, the resistance of the sliding rheostat in the transmission ratio circuit increases, the coupling is a magnetorheological fluid transmission, the coupling is connected to the transmission ratio circuit and is connected in series with the sliding rheostat.

[0007] Furthermore, a buffer cavity is provided inside the rotating shaft, a connecting rod is fixedly installed on the inner side wall of the bottom end of the support ring, two sliding grooves connected to the buffer cavity are symmetrically provided on the outer side of the rotating shaft, and the connecting rod is slidingly connected to the sliding groove, a spring is fixedly installed on the inner bottom wall of the buffer cavity, and the top of the spring is fixedly connected to the bottom of the connecting rod.

[0008] Furthermore, two pairs of support rods are symmetrically fixedly installed on the inner side wall of the fixed seat, and an arc-shaped arc frame is fixedly installed on one end of the two pairs of support rods close to the rotating shaft, and an adjusting rod is slidably installed between the two arc frames. A spray pipe is fixedly installed on the side of the adjusting rod close to the rotating shaft, and a spray head is fixedly connected to the end of the spray pipe close to the rotating shaft, and the end of the spray pipe away from the spray head passes through the adjusting rod and is fixedly connected to a connecting pipe.

[0009] Furthermore, one end of the connecting pipe away from the spray pipe movably penetrates the side wall of the fixed seat and is externally connected to a spraying device. The connecting pipe is made of a retractable material or a retractable bellows or is loosely installed, and is used to ensure operating conditions when the spray pipe drives the connecting pipe to move up and down.

[0010] Furthermore, a support shaft is rotatably installed on the inner bottom wall of the installation cavity, and the driving shaft is transmission-connected with the support shaft, a main bevel gear is fixedly installed on the top of the support shaft, and the main bevel gear has only half a tooth block, a connecting shaft is rotatably installed on the inner side wall of the installation cavity, and the axis of the connecting shaft coincides with the axis of the center of the arc of the arc frame, two slave bevel gears are fixedly installed on the outer side of the connecting shaft, and the two slave bevel gears are engaged or disengaged with the main bevel gear, one end of the connecting shaft close to the spray pipe movably passes through the side wall of the installation cavity and is fixedly connected with a fixing ring, a driving rod is fixedly installed on the outer side of the fixing ring, and the end of the driving rod away from the fixing ring is fixedly connected to the adjusting rod.

[0011] Furthermore, two placement grooves are provided on one side of the adjusting rod close to the rotating shaft, rollers are rotatably installed inside the placement grooves, and a movable groove is provided on the inner side wall of the arc frame and is limitedly and rollingly connected to the rollers.

[0012] The beneficial effects of the present invention are as follows:

[0013] The present application provides a rail wheel surface spraying device, which senses different types of wheels through a support plate, a support ring and a spring. Different types of wheels compress the spring differently, so that the support ring drives the sliding vane to slide at different distances through the adjustment plate. The resistance of the sliding rheostat in the transmission ratio circuit is changed by the sliding vane, and the resistance affects the magnetic field strength of the coupling through the current. As the magnetic field strength of the coupling changes, the viscosity of the magnetorheological fluid in the coupling also changes, so that the bonding strength between the drive shaft and the rotating shaft changes accordingly, and finally the purpose of changing the rotation speed of the rotating shaft according to the mass of the wheel is achieved; through the flexible transmission of the coupling, the start and stop of the rotation becomes soft start and stop, effectively protecting the spray surface from sagging caused by inertial centrifugation.

[0014] At the same time, the driving shaft drives the main bevel gear to rotate through the supporting shaft. When the main bevel gear rotates, the meshing transmission between the main bevel gear and the two slave bevel gears enables the connecting shaft to drive the adjusting rod and the nozzle to slide back and forth on the inner wall of the arc frame through the driving rod. When the nozzle slides back and forth to spray the wheel, not only the spraying direction is more comprehensive, reducing the possibility of spraying dead angles, but also the rotation speed of the wheel during spraying can be changed according to different types of wheels to ensure uniform coverage of the coating, so that the coating is evenly distributed on the surface of the wheel, which helps to avoid uneven adhesion of the paint during rotation, resulting in uneven coating thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work:

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the motor, rotating shaft and adjusting plate of the present invention;

[0019] Figure 4 It is a schematic diagram of the main cross-sectional structure of the rotating shaft, the supporting plate and the supporting ring of the present invention;

[0020] Figure 5 It is a structural schematic diagram of the support shaft, the secondary bevel gear and the adjusting rod of the present invention;

[0021] Figure 6 For the present invention Figure 5 Enlarged structural diagram at A in the middle.

[0022] In the figure: 1, fixed seat; 2, rotating shaft; 201, buffer chamber; 3, support plate; 4, installation chamber; 5, motor; 6, drive shaft; 7, coupling; 8, support ring; 9, adjustment plate; 10, installation groove; 11, installation box; 12, sliding rheostat; 13, slide; 14, connecting rod; 15, slide groove; 16, spring; 17, support rod; 18, arc frame; 19, adjustment rod; 20, spray pipe; 21, nozzle; 22, connecting pipe; 23, support shaft; 24, main bevel gear; 25, connecting shaft; 26, slave bevel gear; 27, fixed ring; 28, drive rod; 29, placement groove; 30, roller. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example 1, see Figures 1 to 6A rail wheel surface spraying device comprises a fixed seat 1, a rotating shaft 2 is rotatably installed on the inner bottom wall of the fixed seat 1, a support plate 3 is slidably installed on the outer side of the top end of the rotating shaft 2, and is used to provide support for the wheel to be sprayed, an installation cavity 4 is opened inside the fixed seat 1, a motor 5 is fixedly installed on the inner bottom wall of the installation cavity 4, a driving shaft 6 is fixedly installed on the output end of the motor 5, and a coupling 7 is fixedly installed on the end of the driving shaft 6 away from the motor 5, the bottom end of the rotating shaft 2 movably passes through the interlayer between the fixed seat 1 and the installation cavity 4 and is fixedly connected to the output end of the coupling 7, and the driving shaft 6, the coupling 7 and the rotating shaft 2 are driven to rotate through the output end of the motor 5, and then the wheel on the top of the support plate 3 is driven to rotate when the wheel is sprayed.

[0025] A support ring 8 is slidably installed on the outer side of the top end of the rotating shaft 2, and the bottom wall of the support plate 3 is fixedly connected to the top wall of the support ring 8. A buffer cavity 201 is provided inside the rotating shaft 2, and a connecting rod 14 is fixedly installed on the inner side wall of the bottom end of the support ring 8. Two slide grooves 15 connected to the buffer cavity 201 are symmetrically provided on the outer side of the rotating shaft 2, and the connecting rod 14 is slidably connected to the slide groove 15 in a limited position. A spring 16 is fixedly installed on the inner bottom wall of the buffer cavity 201, and the top of the spring 16 is fixedly connected to the bottom of the connecting rod 14. The support ring 8 and the support plate 3 are supported by the spring 16 through the connecting rod 14. When a wheel is placed on the top of the support plate 3, under the action of the gravity of the wheel, the support plate 3 and the support ring 8 slide downward and compress the spring 16 through the connecting rod 14.

[0026] An adjusting plate 9 is fixedly installed on the outer side of the bottom end of the support ring 8, and a mounting groove 10 is also opened inside the fixing seat 1. A mounting box 11 is fixedly installed inside the mounting groove 10, and a sliding rheostat 12 is fixedly installed on the inner wall of the mounting box 11. The sliding rheostat 12 includes a slide 13 slidably installed at the opening of the mounting box 11, and the end of the slide 13 away from the mounting box 11 is fixedly connected to the adjusting plate 9. The sliding rheostat 12 is electrically connected to a DC power supply and constitutes a transmission ratio circuit. During the sliding process of the slide 13 toward the mounting cavity 4, the resistance of the sliding rheostat 12 in the transmission ratio circuit increases. The coupling 7 is a magnetorheological fluid transmission. The coupling 7 is connected to the transmission ratio circuit and is connected in series with the sliding rheostat 12. When the support plate 3 and the support ring 8 slide downward under the action of the wheel gravity, the support ring 8 drives the adjusting plate 9 and the slide 13 synchronously Sliding, and when the slider 13 slides downward on the sliding rheostat 12, the resistance of the sliding rheostat 12 in the transmission ratio circuit increases, and the current decreases. The reduction in current weakens the magnetic field strength of the coupling 7, and the interior of the coupling 7 contains magnetorheological fluid. The magnetorheological fluid is an intelligent material that can significantly change its rheological properties under the action of a magnetic field. As the magnetic field strength of the coupling 7 weakens, the viscosity of the magnetorheological fluid is further weakened, so that the bonding strength between the drive shaft 6 and the rotating shaft 2 is weakened, the rotation speed of the rotating shaft 2 is reduced, and the rotation speed of the wheel to be sprayed on the top of the support plate 3 is also reduced, thereby achieving the goal of changing the rotation speed of the wheel during spraying according to different types of wheels, ensuring uniform coverage of the coating, so that the coating is evenly distributed on the surface of the wheel, which helps to avoid uneven adhesion of the coating during rotation, resulting in uneven coating thickness.

[0027] For example 2, please refer to Figure 2 , Figure 5 Figure 6 On the basis of the first embodiment, two pairs of support rods 17 are symmetrically fixedly installed on the inner side wall of the fixed seat 1, and an arc-shaped arc frame 18 is fixedly installed on one end of the two pairs of support rods 17 close to the rotating shaft 2, and an adjusting rod 19 is slidably installed between the two arc frames 18. Two placement grooves 29 are provided on the side of the adjusting rod 19 close to the rotating shaft 2, and a roller 30 is rotatably installed inside the placement groove 29. An active groove connected to the roller 30 for limited rolling is provided on the inner side wall of the arc frame 18. When the adjusting rod 19 slides on the inner side wall of the arc frame 18, the rolling of the roller 30 in the active groove reduces the friction between the arc frame 18 and the adjusting rod 19, thereby avoiding the jamming of the adjusting rod 19 when sliding on the inner side wall of the arc frame 18.

[0028] A spray pipe 20 is fixedly installed on one side of the adjusting rod 19 close to the rotating shaft 2, and a nozzle 21 is fixedly connected to one end of the spray pipe 20 close to the rotating shaft 2, and the nozzle 21 is perpendicular to the adjusting rod 19 in the horizontal direction. The end of the spray pipe 20 away from the nozzle 21 penetrates the adjusting rod 19 and is fixedly connected to a connecting pipe 22. The end of the connecting pipe 22 away from the spray pipe 20 movably penetrates the side wall of the fixed seat 1 and is externally connected to a spraying device. The paint is sprayed through the connecting pipe 22, the spray pipe 20 and the nozzle 21 through the spraying equipment, and then the wheel surface is sprayed. The nozzle 21 arranged perpendicular to the adjusting rod 19 in the horizontal direction makes it possible for the adjusting rod 19 to drive the nozzle 21 to slide, so that not only the distance between the nozzle 21 and the outer surface of the wheel is stable, but also the spraying direction of the spray material is more comprehensive, reducing the possibility of spraying dead angles. The connecting pipe 22 is a retractable material or a retractable bellows or is loosely installed, which is used to ensure the operating conditions when the spray pipe 20 drives the connecting pipe 22 to move up and down.

[0029] A support shaft 23 is rotatably installed on the inner bottom wall of the installation cavity 4, and the driving shaft 6 is transmission-connected to the support shaft 23. A main bevel gear 24 is fixedly installed on the top of the support shaft 23, and the main bevel gear 24 has only half a tooth block. A connecting shaft 25 is rotatably installed on the inner side wall of the installation cavity 4, and the axis of the connecting shaft 25 coincides with the axis of the center of the arc of the arc frame 18. Two slave bevel gears 26 are fixedly installed on the outer side of the connecting shaft 25, and the two slave bevel gears 26 are meshed or separated with the main bevel gear 24. One end of the connecting shaft 25 close to the spray pipe 20 movably passes through the side wall of the installation cavity 4 and is fixedly connected with a fixing ring 27. A driving rod 28 is fixedly installed on the outer side of the fixing ring 27, and the end of the driving rod 28 away from the fixing ring 27 is fixedly connected to the adjusting rod 19. When the output end of the motor 5 drives the support shaft 23 to rotate through the driving shaft 6, the support shaft 23 drives the main The bevel gear 24 rotates, and when the main bevel gear 24 with only half of the gear blocks is meshed and transmitted with one of the slave bevel gears 26, the slave bevel gear 26 drives the fixing ring 27 and the driving rod 28 to rotate through the connecting shaft 25, and the driving rod 28 drives the adjusting rod 19 to slide from the bottom end of the arc frame 18 to the top end. When the main bevel gear 24 rotates to no longer mesh with the slave bevel gear 26, the main bevel gear 24 will continue to mesh and transmit with another slave bevel gear 26, and then drive the other slave bevel gear 26 to rotate, so that the connecting shaft 25 can rotate in the opposite direction, and then drive the adjusting rod 19 to slide in the opposite direction from the top end of the arc frame 18 to the bottom end through the fixing ring 27 and the driving rod 28, and finally achieve the purpose of the adjusting rod 19 driving the spray pipe 20 and the nozzle 21 to slide back and forth on the inner side wall of the arc frame 18, so that the nozzle 21 can spray the wheel more comprehensively and the spraying effect is better.

[0030] Working principle:

[0031] When spraying the wheel, the wheel is placed on the top of the support plate 3, and the output end of the motor 5 drives the drive shaft 6, the coupling 7 and the rotating shaft 2 to rotate, and then drives the wheel on the top of the support plate 3 to rotate. When the support plate 3 and the support ring 8 slide downward under the action of the wheel gravity, the spring 16 is compressed, and the support ring 8 drives the adjustment plate 9 and the sliding plate 13 to slide synchronously. When the sliding plate 13 slides up and down on the sliding rheostat 12, the resistance of the sliding rheostat 12 in the transmission ratio circuit increases, and the current decreases. The reduction in current weakens the magnetic field strength of the coupling 7. The coupling 7 contains magnetorheological fluid inside. As the magnetic field strength of the coupling 7 weakens, the viscosity of the magnetorheological fluid is further weakened, so that the bonding strength between the drive shaft 6 and the rotating shaft 2 is weakened, the rotation speed of the rotating shaft 2 is reduced, and the rotation speed of the wheel to be sprayed on the top of the support plate 3 is also reduced, thereby achieving the goal of changing the rotation speed of the wheel during spraying according to different types of wheels to ensure uniform coverage of the coating, so that the coating is evenly distributed on the surface of the wheel, which helps to avoid uneven adhesion of the coating during rotation, resulting in uneven coating thickness;

[0032] When the output end of the motor 5 drives the support shaft 23 to rotate through the drive shaft 6, the support shaft 23 drives the main bevel gear 24 to rotate. When the main bevel gear 24 with only half of the gear block is meshed with one of the slave bevel gears 26 for transmission, the slave bevel gear 26 drives the fixing ring 27 and the driving rod 28 to rotate through the connecting shaft 25. The driving rod 28 then drives the adjusting rod 19 to slide from the bottom end of the arc frame 18 to the top end. When the main bevel gear 24 rotates to no longer mesh with the slave bevel gear 26, the main bevel gear 24 will continue to mesh with the other slave bevel gear. 26 meshes with the transmission, and then drives another slave bevel gear 26 to rotate, so that the connecting shaft 25 can rotate in the opposite direction, and then drives the adjusting rod 19 to slide in the opposite direction from the top of the arc frame 18 to the bottom through the fixing ring 27 and the driving rod 28, and finally achieves the purpose of the adjusting rod 19 driving the spray pipe 20 and the spray head 21 to slide back and forth on the inner wall of the arc frame 18. Not only the distance between the spray head 21 and the outer surface of the wheel is stable, but also the spraying direction of the spray material is more comprehensive, which reduces the possibility of spraying dead angles and achieves better spraying effect.

[0033] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rail wheel surface spraying device, characterized in that: The invention comprises a fixed seat (1), a rotating shaft (2) is rotatably mounted on the inner bottom wall of the fixed seat (1), a support plate (3) is slidably mounted on the outer side of the top end of the rotating shaft (2), and is used to provide support for the wheel to be sprayed; an installation cavity (4) is provided inside the fixed seat (1), a motor (5) is fixedly mounted on the inner bottom wall of the installation cavity (4), a driving shaft (6) is fixedly mounted on the output end of the motor (5), a coupling (7) is fixedly mounted on the end of the driving shaft (6) away from the motor (5), the bottom end of the rotating shaft (2) movably passes through the interlayer between the fixed seat (1) and the installation cavity (4) and is fixedly connected to the output end of the coupling (7), a support ring (8) is slidably mounted on the outer side of the top end of the rotating shaft (2), the bottom wall of the support plate (3) is fixedly connected to the top wall of the support ring (8), and the bottom end of the support ring (8) is fixedly mounted on the outer side. An adjusting plate (9) is fixedly installed, a mounting groove (10) is also provided inside the fixing seat (1), a mounting box (11) is fixedly installed inside the mounting groove (10), a sliding rheostat (12) is fixedly installed on the inner wall of the mounting box (11), the sliding rheostat (12) comprises a sliding piece (13) slidably installed at the opening of the mounting box (11), one end of the sliding piece (13) away from the mounting box (11) is fixedly connected to the adjusting plate (9), the sliding rheostat (12) is electrically connected to a DC power supply and constitutes a transmission ratio circuit, when the sliding piece (13) slides in the direction of the mounting cavity (4), the resistance of the sliding rheostat (12) in the transmission ratio circuit increases, the coupling (7) is a magnetorheological fluid transmission, the coupling (7) is connected to the transmission ratio circuit and is connected in series with the sliding rheostat (12).

2. A rail wheel surface spraying device according to claim 1, characterized in that: A buffer cavity (201) is provided inside the rotating shaft (2); a connecting rod (14) is fixedly mounted on the inner side wall of the bottom end of the supporting ring (8); two sliding grooves (15) connected to the buffer cavity (201) are symmetrically provided on the outer side of the rotating shaft (2); the connecting rod (14) and the sliding grooves (15) are limitedly slidably connected; a spring (16) is fixedly mounted on the inner bottom wall of the buffer cavity (201); the top end of the spring (16) is fixedly connected to the bottom of the connecting rod (14).

3. A rail wheel surface spraying device according to claim 2, characterized in that: Two pairs of support rods (17) are symmetrically fixedly mounted on the inner side wall of the fixed seat (1); an arc-shaped arc frame (18) is fixedly mounted on one end of the two pairs of support rods (17) close to the rotating shaft (2); an adjusting rod (19) is slidably mounted between the two arc frames (18); a spray pipe (20) is fixedly mounted on one side of the adjusting rod (19) close to the rotating shaft (2); a spray head (21) is fixedly connected to one end of the spray pipe (20) close to the rotating shaft (2); and an end of the spray pipe (20) away from the spray head (21) passes through the adjusting rod (19) and is fixedly connected to a connecting pipe (22).

4. A rail wheel surface spraying device according to claim 3, characterized in that: One end of the connecting pipe (22) away from the spray pipe (20) movably penetrates the side wall of the fixing seat (1) and is externally connected to a spraying device. The connecting pipe (22) is made of a retractable material or a retractable bellows or is loosely installed, and is used to ensure operating conditions when the spray pipe (20) drives the connecting pipe (22) to move up and down.

5. A rail wheel surface spraying device according to claim 4, characterized in that: A support shaft (23) is rotatably mounted on the inner bottom wall of the installation cavity (4), and the drive shaft (6) is transmission-connected to the support shaft (23). A main bevel gear (24) is fixedly mounted on the top of the support shaft (23), and the main bevel gear (24) has only half a tooth block. A connecting shaft (25) is rotatably mounted on the inner side wall of the installation cavity (4), and the axis of the connecting shaft (25) coincides with the axis of the arc center of the arc frame (18). Two slave bevel gears (26) are fixedly mounted on the outer side of the connecting shaft (25), and the two slave bevel gears (26) are meshed with or separated from the main bevel gear (24). One end of the connecting shaft (25) close to the spray pipe (20) movably passes through the side wall of the installation cavity (4) and is fixedly connected to a fixing ring (27). A driving rod (28) is fixedly mounted on the outer side of the fixing ring (27), and one end of the driving rod (28) away from the fixing ring (27) is fixedly connected to the adjusting rod (19).

6. A rail wheel surface spraying device according to claim 3, characterized in that: Two placement grooves (29) are provided on one side of the adjusting rod (19) close to the rotating shaft (2), a roller (30) is rotatably mounted inside the placement groove (29), and a movable groove is provided on the inner side wall of the arc frame (18) and is limitedly and rollingly connected to the roller (30).

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