A brake disc spraying shielding device

Abstract

The application belongs to the technical field of brake disc spraying device, in particular to a brake disc spraying shielding device, which comprises a workbench and positioning blocks, and the brake disc bodies to be sprayed are placed on the positioning blocks; the outer edges and upper positions of the brake disc bodies are respectively provided with built-in edge spraying mechanisms and top shielding spraying mechanisms; the edge spraying mechanism comprises a guide block and a nozzle, and the guide block enables the nozzle to move in a wave shape along the outer edge of the brake disc. In the spraying operation of the brake disc, the nozzle can move in a wave shape along the outer edge of the brake disc, realizing a deep intervention type spraying mode, solving the problem of uneven coating coverage of the inner wall caused by the space limitation of the ventilation cavity in the existing spraying mode from the outside to the inside, and ensuring that the protective coating is fully covered; at the same time, the built-in precise spraying direction greatly reduces the splashing of the coating to the outside, avoids spilling into the gap of the friction working surface, improves the utilization rate of the coating, saves the cost, and improves the safety of the working environment.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of brake disc spraying devices, and particularly relates to a brake disc spraying shielding device. BACKGROUND

[0002] A brake disc is a core rotating component in an automobile disc brake system, usually made of gray cast iron or alloy material, in a disc shape, fixed on a wheel hub by bolts, and rotates synchronously with the wheel, and the friction working surfaces on both sides are key areas. During braking, the brake pads clamp these working surfaces under the action of hydraulic pressure or air pressure, utilize friction to generate resistance, convert the kinetic energy of the vehicle into heat energy, so as to realize vehicle deceleration or parking. In order to improve performance, many brake discs are provided with ventilation structures (such as internal heat radiating ribs and ventilation cavities) to accelerate heat dissipation and avoid brake efficiency reduction caused by high temperature; at the same time, the non-friction areas (such as the outer edge and the inner side of the disc hub) are usually sprayed with anti-rust coating to enhance durability. The flatness, wear resistance and heat dissipation capacity of the brake disc directly affect the stability and safety of the braking effect, and are important components for guaranteeing the braking performance of the vehicle.

[0003] Spraying the brake disc is an important process in automobile manufacturing and maintenance, and the core purpose is to improve the performance, durability and safety of the brake disc; meanwhile, aesthetics is also considered. Brake disc spraying is usually mainly for anti-rust and anti-corrosion treatment of the non-friction working surfaces (such as the outer edge, the internal part of the ventilation structure and the non-adhesion area of the disc hub, etc.), which are easily affected by rust in complex environments such as rain, salt and mud, affecting the structural strength and service life. Through a special spraying shielding device, the friction working surfaces can be avoided, the spraying will not interfere with the friction performance during braking, the overall durability of the brake disc can be prolonged, the maintenance cost can be reduced, and the stable structure and function of the brake disc can be ensured in long-term use.

[0004] The existing brake disc spraying shielding device needs to move the shielding tooling provided with a ring plate (covering the brake part of the brake disc), a circular plate (covering the tire part) and a connecting rod to the brake disc by manual or mechanical operation before spraying, and then controls the nozzle to spray on the outside (the outer edge or the top) of the brake disc by a mechanical arm: when the nozzle is located on the outer edge, it is parallel to the brake disc towards the outside, and the ventilation cavity and the heat radiating rib inside the outer edge are sprayed from the outside to the inside. However, this operation mode has the following defects: first, there is a gap between the ring plate of the shielding tooling and the working surface on the upper side of the brake disc, and side spraying easily causes the coating to overflow into the gap, increasing the subsequent processing procedure; second, due to the size limitation of the ventilation cavity, the closer to the center of the brake disc, the more uneven the coating coverage on the inner wall of the ventilation cavity, and it is difficult to achieve overall protection; third, external spraying will cause a large amount of coating to spread to the surrounding environment, which not only causes material waste and increases cost, but also endangers the health of workers. SUMMARY

[0005] The application aims to provide a brake disc spraying shielding device to solve the problems in the background.

[0006] The application adopts the technical scheme of:

[0007] A brake disc spraying shielding device comprises a workbench and a plurality of positioning blocks arranged on the workbench, each of the positioning blocks is arranged with a brake disc body to be sprayed, the outer edge and the upper position of the brake disc body are respectively provided with an edge spraying mechanism and a top shielding spraying mechanism, the edge spraying mechanism comprises a first mounting plate, a second mounting plate, a first baffle and a second baffle, the first mounting plate, the second mounting plate, the first baffle and the second baffle are connected by bolts, and form an outer shell which can move around the outer edge of the brake disc body, the first mounting plate is provided with a guide block and a nozzle, the guide block and the nozzle are connected, the guide block enables the nozzle to move in a wave around the outer edge of the brake disc, and the front end of the nozzle can be inserted into the ventilation cavity of the brake disc body.

[0008] Preferably, the first mounting plate is slidingly connected with a sliding frame, the sliding frame comprises a connecting part and a sliding part, the guide block can slide along the length direction of the sliding part, the two sides of the connecting part are respectively provided with a first rack and a return spring, the first rack is embedded in the groove of the connecting part, the first rack is connected with a first transmission gear, the first transmission gear is connected with a reverse gear, and the reverse gear and the first transmission gear are both rotatably connected with the upper side of the first mounting plate through shaft rods.

[0009] Preferably, the guide block comprises a limiting part, an excess part and two guide parts, the guide parts are located on the two sides of the excess part, and the screw holes on the limiting part are threadedly connected with positioning knobs.

[0010] Preferably, the first mounting plate is further provided with a limiting block, one side of the limiting block is connected with the return spring.

[0011] Preferably, the upper end of the shaft rod of the reverse gear is provided with a synchronous gear, the synchronous gear is located on the second mounting plate, the synchronous gear is connected with an amplification support with a tooth piece, the end of the amplification support away from the synchronous gear is connected with a second transmission gear, the second transmission gear is connected with a second rack, the outer side of the second rack is provided with a moving frame, and the moving frame is connected with the nozzle through bolts.

[0012] Preferably, the front edges of the first baffle and the second baffle are both provided with shielding strips, and the shielding strips are pressed on the upper and lower sides of the outer edge of the brake disc body.

[0013] Preferably, the workbench is further provided with a driving mechanism, the driving mechanism comprises a plurality of support frames and guide rails arranged below each support frame, one end of each guide rail is provided with a connecting block, a pneumatic cylinder is arranged on each guide rail, the output end of each pneumatic cylinder is provided with a pushing frame, the pushing frame slides in the guide rail, and the pushing frame is connected with the first baffle through bolts.

[0014] Preferably, the top shielding spraying mechanism comprises an electric push rod and a hollow support shaft, the electric push rod and the support shaft are located on the support frame, a spray pipe is arranged in the support shaft, the lower end of the spray pipe is provided with a disc-shaped nozzle, the output end of the electric push rod is provided with a connecting frame connected with the outer wall of the spray pipe, the outer wall of the support shaft is provided with a driven gear, and the outer wall of the support shaft is connected with the corresponding connecting block.

[0015] Preferably, the spray pipe is further provided with a shielding cover, the shielding cover comprises an outer shielding part and an inner shielding part, and the outer shielding part and the inner shielding part are connected through a support, the inner shielding part can be pressed on the top of the brake disc body, the outer shielding part can be pressed on the friction working surface on the upper side of the brake disc body, and the nozzle is located between the outer shielding part and the inner shielding part.

[0016] Preferably, each support frame is provided with a rotating shaft, and adjacent two rotating shafts are connected through a belt pulley and a belt, the lower end of each rotating shaft is provided with a driving gear meshed and connected with the corresponding driven gear, and one of the support frames is connected with a motor through a support, and the output end of the motor is connected with the corresponding rotating shaft.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] (1) The workbench, the positioning block, the first mounting plate, the second mounting plate, the first baffle, the second baffle, the gear, the reset spring, the gear, the guide block, the amplification support, the moving frame and the sliding frame are arranged, in the process of spraying the brake disc, the nozzle can move in a wave along the outer edge of the brake disc, the fulcrum of the amplification support is close to the side of the synchronous gear, so that the moving range of the nozzle is increased, the front end of the nozzle can be inserted into the ventilation cavity of the brake disc in a larger wave trajectory, a deep intervention type spraying mode is realized, the inner wall of the ventilation cavity and the inner wall of the heat dissipation rib can be covered, especially the area close to the center of the brake disc, the problem of uneven coating of the inner wall caused by the space limitation of the ventilation cavity in the existing spraying mode from the outside to the inside is solved, and the protective coating is fully covered.

[0019] The structure can prevent the problem of paint overflow to the gap of the friction working surface, avoid the problem that in the existing side spraying mode, the paint is easy to seep from the gap between the outer shielding part of the shielding cover and the working surface due to the nozzle being located outside the brake disc, the spraying direction is more accurately directed to the inner wall area needing protection since the nozzle penetrates into the ventilation cavity of the brake disc body along the wave trajectory, the probability of paint splashing to the outside is reduced, thereby the process cost of cleaning the residual paint in the gap is reduced, and the cleanliness of the friction working surface is ensured;

[0020] Compared with the existing external spraying, the built-in spraying mode of the present application significantly reduces material waste, reduces the amount of paint diffused to the external space, reduces the impact on the environment, improves the utilization rate of paint, saves material cost, and improves the safety of the working environment.

[0021] (2) The support shaft, spray pipe, spray head, shielding cover, outer shielding part, inner shielding part, driven gear, electric push rod and connecting frame are arranged to cover the friction working surface and the top protruding position on the upper side of the brake disc body before spraying, the spray head can spray in the gap between the outer shielding part and the inner shielding part, the paint is prevented from splashing onto the brake disc working surface which needs to be strictly protected, the subsequent cleaning process of the residual paint on the working surface is saved, and the cleanliness and braking performance of the core friction area of the brake disc are ensured.

[0022] Meanwhile, the top built-in spraying mode significantly improves the spraying quality and reduces material waste, and forms a relatively closed spraying environment, the built-in spray head can concentrate on the gap position for spraying, avoiding the problem of paint diffusion to the surrounding space during external spraying, greatly improving the utilization rate of paint; in addition, the closed space can reduce the interference of airflow on the spraying trajectory, so that the paint is more evenly attached to the surface of the brake disc, improving the protection effect of the coating layer and reducing the risk of local rust caused by uneven spraying.

[0023] (3) The support frame, guide rail, connecting block, air cylinder, push frame, rotating shaft and drive gear are arranged to realize synchronous spraying operation of multiple brake discs, significantly improve production efficiency, and greatly shorten the total time of batch spraying; at the same time, unified driving control can ensure the action accuracy and spraying parameters of each spraying structure to be consistent, avoid the spraying quality difference caused by individual driving, ensure that the coating thickness, coverage range and other indicators of all brake discs are uniform, improve the consistency of products, and better adapt to the needs of large-scale production.

[0024] The present application will be explained in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1The overall structure schematic diagram of the present application;

[0026] Figure 2 The overall exploded structure schematic diagram of the present application;

[0027] Figure 3 The exploded structure schematic diagram of the edge spraying mechanism of the present application;

[0028] Figure 4 The exploded structure schematic diagram of the first mounting plate of the present application;

[0029] Figure 5 The structure schematic diagram of the guide block of the present application;

[0030] Figure 6 The exploded structure schematic diagram of the second mounting plate of the present application;

[0031] Figure 7 The structure schematic diagram of the amplification support of the present application;

[0032] Figure 8 The structure schematic diagram of the first baffle of the present application;

[0033] Figure 9 The connection structure schematic diagram of the driving mechanism of the present application;

[0034] Figure 10 The exploded structure schematic diagram of the top shielding spraying mechanism of the present application;

[0035] Figure 11 The cross-sectional structure schematic diagram of the shielding cover of the present application.

[0036] In the figure: 1, workbench; 11, positioning block; 2, brake disc body; 3, edge spraying mechanism; 31, first mounting plate; 311, limiting block; 312, return spring; 313, first rack; 314, first transmission gear; 315, reverse gear; 316, positioning knob; 32, second mounting plate; 33, first baffle; 331, shielding strip; 34, second baffle; 35, sliding frame; 351, connecting part; 352, sliding part; 36, guide block; 361, guide part; 362, excess part; 363, limiting part; 37, amplification support; 371, synchronous gear; 372, second transmission gear; 38, moving frame; 381, second rack; 39, nozzle; 4, top shielding spraying mechanism; 41, support shaft; 42, spray pipe; 43, spray head; 44, shielding cover; 441, outer shielding part; 442, inner shielding part; 45, driven gear; 46, electric push rod; 47, connecting frame; 5, driving mechanism; 51, support frame; 52, guide rail; 521, connecting block; 53, air cylinder; 531, pushing frame; 54, rotating shaft; 55, driving gear; 56, motor. DETAILED DESCRIPTION

[0037] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0038] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] Example 1

[0041] like Figures 1-11 As shown, a brake disc spraying masking device includes a workbench 1 and multiple positioning blocks 11 disposed on the workbench 1. Each positioning block 11 holds a brake disc body 2 to be sprayed. The outer edge and top of the brake disc body 2 are respectively provided with an internal edge spraying mechanism 3 and a top masking spraying mechanism 4. The edge spraying mechanism 3 includes a first mounting plate 31, a second mounting plate 32, a first baffle 33 and a second baffle 34. The first mounting plate 31, the second mounting plate 32, the first baffle 33 and the second baffle 34 are connected to each other by bolts and form an outer shell that can move around the outer edge of the brake disc body 2. The first mounting plate 31 is provided with a guide block 36 and a nozzle 39. The guide block 36 and the nozzle 39 are linked. The guide block 36 causes the nozzle 39 to move in a wave-like motion around the outer edge of the brake disc. The front end of the nozzle 39 can penetrate into the ventilation cavity of the brake disc body 2.

[0042] Through the above structure, in the process of spraying the brake disc, the nozzle 39 can move in waves along the outer edge of the brake disc. The large-amplitude trajectory enables the front end of the nozzle 39 to penetrate into the ventilation cavity of the brake disc, realizing a deep intervention spraying mode, solving the problem of uneven coating of the inner wall caused by the space limitation of the ventilation cavity in the existing spraying mode from the outside to the inside, thereby ensuring that the protective coating is fully covered. At the same time, the built-in precise spraying direction of the area that needs protection greatly reduces the splashing of the coating to the outside, avoids spilling into the gap of the friction working surface, reduces the subsequent cleaning cost. In addition, the trajectory of the nozzle 39 fitted with the ventilation cavity structure significantly improves the utilization rate of the coating, reduces the diffusion amount in the external space, saves cost, and improves the safety of the working environment.

[0043] The specific operation is as follows. First, the brake disc body 2 to be sprayed is positioned on the positioning block 11, then the spray pipe 42 is lowered by the electric push rod 46, and then the shielding cover 44 on the spray pipe 42 is pressed on the upper side of the brake disc body 2, i.e. the outer shielding part 441 is pressed on the friction working surface of the brake disc, and the inner shielding part 442 is pressed on the connecting part of the brake disc protrusion. Then, the nozzle 39 is aligned with the middle position of one ventilation cavity of the brake disc, the positioning knob 316 is turned, the guide block 36 is slid along the length direction of the sliding part 352 of the sliding frame 35, and the guide block 36 is adjusted to the middle position of the other ventilation cavity. Then, the positioning knob 316 is tightened, the gas cylinder 53 is started, the edge spraying mechanism 3 moves to one side of the brake disc, the outer shell is tightly attached to the outer edge of the brake disc, and the two shielding strips 331 are pressed on the upper and lower sides of the outer edge. Then, the motor 56 is started to drive the rotating shaft 54 to rotate, and under the action of the belt pulley, the belt, the drive gear 55 and the driven gear 45, the support shaft 41 is driven to rotate, and then the support shaft 41 drives the edge spraying mechanism 3 to move in a clockwise circular motion around the brake disc through the connecting block 521 and the sliding rail;

[0044] During the clockwise movement, the curved guide part 361 on the guide block 36 will first abut against the heat dissipation rib on one side of the corresponding ventilation cavity, the guide part 361 and the transition part on the guide block 36 will slide through the heat dissipation rib in sequence, and the width of the transition part 362 is greater than the diameter of the nozzle 39, which can provide sufficient time for the nozzle 39 to pass through the corresponding heat dissipation rib. When the transition part 362 slides through the heat dissipation rib, the nozzle 39 also passes through the corresponding heat dissipation rib;

[0045] When the guide part 361 contacts the outer edge of the heat dissipation rib, an outward force is applied to the guide block 36, causing the guide block 36 to move to one side of the first mounting plate 31. Since the guide part 361 is a curved surface structure, as the guide part 361 slides on the outer edge of the heat dissipation rib, the outward movement of the guide block 36 will also become larger and larger. The guide block 36 drives the first rack 313 to move outward through the sliding frame 35, the return spring 312 is compressed, the first transmission gear 314 rotates counterclockwise, the second transmission gear 372 and the synchronous gear 371 rotate clockwise, and the amplification bracket 37 rotates counterclockwise. The second transmission gear 372 connected with the amplification bracket 37 rotates clockwise, and the nozzle 39 is pulled out of the ventilation cavity through the cooperation of the second rack 381 and the moving frame 38, that is, it moves outward. Since the fulcrum of the amplification bracket 37 is close to one side of the synchronous gear 371, the movement amplitude of the nozzle 39 is increased (the difference in the fulcrum position of the lever causes the arc length of the two ends of the bracket to be different), which avoids the collision of the nozzle 39 with the outer edge of the heat dissipation rib;

[0046] Conversely, after the guide block 36 passes the outer edge of the heat dissipation rib, the guide block 36 and the nozzle 39 will be inserted into the ventilation cavity again under the action of the return spring 312, and the process will be repeated. The nozzle 39 performs a wave motion on the edge of the brake disc body 2, and the nozzle 39 probes into each ventilation cavity one by one for spraying;

[0047] At the same time, the gap between the outer shielding part 441 and the inner shielding part 442 of the spray head 43 is sprayed. After spraying is completed, the electric push rod 46 drives the shielding cover 44 to move upwards, and the cylinder 53 separates the edge spraying mechanism 3 from the brake disc, so that the sprayed brake disc body 2 can be taken out.

[0048] Example two

[0049] As Figures 3 to 8As shown, the first mounting plate 31 is slidingly connected with a sliding frame 35, the sliding frame 35 comprises a connecting part 351 and a sliding part 352, the guide block 36 can slide along the length direction of the sliding part 352, the two sides of the connecting part 351 are respectively provided with a first rack 313 and a return spring 312, the first rack 313 is embedded in a groove of the connecting part 351, the first rack 313 is connected with a first transmission gear 314 in meshing mode, the first transmission gear 314 is connected with a reverse gear 315 in meshing mode, and the reverse gear 315 and the first transmission gear 314 are both rotatably connected with the upper side of the first mounting plate 31 through shaft rods, the upper end of the shaft rod of the reverse gear 315 is provided with a synchronous gear 371, the synchronous gear 371 is located on the second mounting plate 32, the synchronous gear 371 is connected with a toothed amplification bracket 37 in meshing mode, the end of the amplification bracket 37 away from the synchronous gear 371 is connected with a second transmission gear 372 in meshing mode, the second transmission gear 372 is connected with a second rack 381 in meshing mode, the outer side of the second rack 381 is provided with a moving frame 38, and the moving frame 38 is connected with the nozzle 39 through bolts. Through the cooperation between the first rack 313, the first transmission gear 314, the reverse gear 315, the amplification bracket 37, the synchronous gear 371, the second transmission gear 372, the moving frame 38 and the second rack 381, the nozzle 39 can be driven to move in the process of the movement of the guide block 36, and the movement range of the nozzle 39 is increased, so that the front end of the nozzle 39 can better penetrate into the ventilation cavity of the brake disc;

[0050] The guide block 36 comprises a limiting part 363, an excessive part 362 and two guide parts 361, the guide parts 361 are located on the two sides of the excessive part 362, the screw holes on the limiting part 363 are threadedly connected with a positioning knob 316, through the positioning knob 316, the guide block 36 is positioned on the sliding frame 35, the first mounting plate 31 is also provided with a limiting block 311, one side of the limiting block 311 is connected with the return spring 312, through the cooperation between the limiting block 311 and the return spring 312, after the guide block 36 passes over the heat dissipation ribs on the brake disc, the guide block 36 is inserted into the ventilation cavity again, the front edges of the first baffle 33 and the second baffle 34 are both provided with a shielding strip 331, and the shielding strip 331 is pressed on the upper and lower sides of the outer edge of the brake disc body 2, through the shielding strip 331, paint overflow can be avoided when the nozzle 39 moves outward.

[0051] Embodiment three

[0052] As Figures 9 to 11As shown, the workbench 1 is further provided with a driving mechanism 5, the driving mechanism 5 comprises a plurality of support frames 51 and guide rails 52 arranged below each support frame 51, one end of each guide rail 52 is provided with a connecting block 521, a pneumatic cylinder 53 is arranged on each guide rail 52, the output end of each pneumatic cylinder 53 is provided with a pushing frame 531, the pushing frame 531 slides in the guide rail 52, and the pushing frame 531 is connected with the first baffle 33 through bolts, and the cooperation between the pneumatic cylinder 53, the guide rail 52 and the pushing frame 531 realizes the movement of the pushing nozzle 39 to one side of the brake disc body 2, the top shielding spraying mechanism 4 comprises an electric push rod 46 and a hollow support shaft 41, the electric push rod 46 and the support shaft 41 are located on the support frame 51, a spray pipe 42 is arranged in the support shaft 41, a disc-shaped nozzle 43 is arranged at the lower end of the spray pipe 42, the output end of the electric push rod 46 is provided with a connecting frame 47, the connecting frame 47 is connected with the outer wall of the spray pipe 42, a shielding cover 44 is further arranged on the spray pipe 42, the shielding cover 44 comprises an outer shielding part 441 and an inner shielding part 442, and the outer shielding part 441 and the inner shielding part 442 are connected through a support, the inner shielding part 442 can be pressed on the top of the brake disc body 2, the outer shielding part 441 can be pressed on the friction working surface on the upper side of the brake disc body 2, the nozzle 43 is located between the outer shielding part 441 and the inner shielding part 442, and the cooperation between the spray pipe 42, the nozzle 43 and the shielding cover 44 realizes the built-in spraying of the top edge position of the brake disc body 2; a driven gear 45 is arranged on the outer wall of the support shaft 41, and the outer wall of the support shaft 41 is connected with the corresponding connecting block 521, and the connecting block 521 drives the guide rail 52 to perform circular motion, a rotating shaft 54 is arranged on each support frame 51, and adjacent two rotating shafts 54 are connected through a belt pulley and a belt, a driving gear 55 is arranged at the lower end of each rotating shaft 54, the driving gear 55 is engagedly connected with the corresponding driven gear 45, and one of the support frames 51 is connected with a motor 56 through a support, the output end of the motor 56 is connected with the corresponding rotating shaft 54, and the rotation of the support shaft 41 is driven by the rotating shaft 54, the driving gear 55, the driven gear 45 and the motor 56.

[0053] The application is described above by way of example with reference to the drawings, and it is obvious that the specific implementation of the application is not limited to the above-described manner, and any non-essential improvement or direct application of the concept and technical solution of the application to other occasions within the protection scope of the application.

Claims

1. A brake disc spraying shielding device, comprising a workbench (1) and a plurality of positioning blocks (11) arranged on the workbench (1), a driving mechanism (5) being arranged near one side of the positioning blocks (11), a brake disc body (2) to be sprayed being placed on each of the positioning blocks (11), an inner built-in edge spraying mechanism (3) and a top shielding spraying mechanism (4) being arranged at the outer edge and the upper position of the brake disc body (2) respectively, characterized in that, The edge spraying mechanism (3) comprises a first mounting plate (31), a second mounting plate (32), a first baffle (33) and a second baffle (34), and the first mounting plate (31), the second mounting plate (32), the first baffle (33) and the second baffle (34) are connected by bolts in pairs and constitute an outer shell body movable around the outer edge of the brake disc body (2), the first mounting plate (31) is provided with a guide block (36) and a nozzle (39), and the front end of the nozzle (39) can be inserted into the ventilation cavity of the brake disc body (2); The first mounting plate (31) is slidably connected with a sliding frame (35), the sliding frame (35) comprises a connecting portion (351) and a sliding portion (352), the guide block (36) can slide along the length direction of the sliding portion (352), the two sides of the connecting portion (351) are respectively provided with a first rack (313) and a return spring (312), the first rack (313) is embedded in the groove of the connecting portion (351), the first rack (313) is connected with a first transmission gear (314) in meshing mode, the first transmission gear (314) is connected with a reverse gear (315) in meshing mode, and the reverse gear (315) and the first transmission gear (314) are both rotatably connected with the upper side of the first mounting plate (31) through shaft rods, the first mounting plate (31) is further provided with a limiting block (311), one side of the limiting block (311) is connected with the return spring (312), the upper end of the shaft rod of the reverse gear (315) is provided with a synchronous gear (371), the synchronous gear (371) is located on the second mounting plate (32), the synchronous gear (371) is connected with a toothed amplification bracket (37) in meshing mode, the end of the amplification bracket (37) away from the synchronous gear (371) is connected with a second transmission gear (372) in meshing mode, the second transmission gear (372) is connected with a second rack (381) in meshing mode, the outer side of the second rack (381) is provided with a moving frame (38), the moving frame (38) is connected with the nozzle (39) through bolts, the front edges of the first baffle (33) and the second baffle (34) are both provided with a shielding strip (331), and the shielding strip (331) is pressed on the upper and lower sides of the outer edge of the brake disc body (2); The guide block (36) comprises a limiting portion (363), an excess portion (362) and two guide portions (361), the guide portions (361) are located on the two sides of the excess portion (362), the screw holes on the limiting portion (363) are threadedly connected with a positioning knob (316), the guide block (36) and the nozzle (39) are connected, when rotating, the guide portions (361) of the guide block (36) first abut against the heat dissipation ribs on one side of the corresponding ventilation cavity of the brake disc body (2), the guide portions (361) and the excess portion (362) of the guide block (36) will slide through the heat dissipation ribs in sequence, so that the guide block (36) drives the nozzle (39) to move around the outer edge of the brake disc body (2) in a wave shape under the action of the driving mechanism (5).

2. The brake disc spraying shielding device according to claim 1, characterized in that, The driving mechanism (5) comprises a plurality of support frames (51) and guide rails (52) arranged below each support frame (51), one end of each guide rail (52) is provided with a connecting block (521), a pneumatic cylinder (53) is arranged on each guide rail (52), and the output end of each pneumatic cylinder (53) is provided with a pushing frame (531) which slides in the guide rail (52) and is connected with the first baffle (33) through bolts.

3. A device for painting a brake disc according to claim 2, characterised in that, The top shielding spraying mechanism (4) comprises an electric push rod (46) and a hollow support shaft (41), the electric push rod (46) and the support shaft (41) are located on the support frame (51), a spray pipe (42) is arranged in the support shaft (41), the lower end of the spray pipe (42) is provided with a disc-shaped nozzle (43), the output end of the electric push rod (46) is provided with a connecting frame (47) which is connected with the outer wall of the spray pipe (42), the outer wall of the support shaft (41) is provided with a driven gear (45), and the outer wall of the support shaft (41) is connected with the corresponding connecting block (521).

4. The device according to claim 3, characterized in that, The spray pipe (42) is further provided with a shielding cover (44), the shielding cover (44) comprises an outer shielding part (441) and an inner shielding part (442), and the outer shielding part (441) and the inner shielding part (442) are connected through a support, the inner shielding part (442) can be pressed on the top of the brake disc body (2), the outer shielding part (441) can be pressed on the friction working surface on the upper side of the brake disc body (2), and the nozzle (43) is located between the outer shielding part (441) and the inner shielding part (442).

5. The brake disc spray obscuration device of claim 3, wherein, Each support frame (51) is provided with a rotating shaft (54), and adjacent two rotating shafts (54) are connected through a belt pulley and a belt, the lower end of each rotating shaft (54) is provided with a driving gear (55) which is meshed and connected with the corresponding driven gear (45), and one of the support frames (51) is connected with a motor (56) through a support, and the output end of the motor (56) is connected with the corresponding rotating shaft (54).

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