Electric motor wheel hub spraying apparatus

Abstract

The application discloses an electric vehicle wheel hub spraying device, which comprises a spraying chamber, a spraying gun, a conveying mechanism, an air extraction mechanism and a placing mechanism, wherein the spraying gun and the air extraction mechanism are arranged in the spraying chamber, the conveying mechanism horizontally penetrates the spraying chamber, and the placing mechanism is provided with a plurality of placing mechanisms which are uniformly distributed along the length direction of the conveying mechanism and are drivingly connected with the conveying mechanism; the placing mechanism comprises a placing rod, a placing block, a mounting column and a triggering module, the lower end of the placing rod is drivingly connected with the surface of the conveying mechanism, the placing block is fixedly connected to the upper end surface of the placing rod, the mounting column is fixedly connected to the upper end surface of the placing block, and the axis of the mounting column is collinear with the axis of the placing rod; the triggering module is arranged in the placing rod, and part of the structure of the triggering module extends into the placing block and the mounting column. Thus, the protection of the center hole of the wheel hub can be realized, the problems of the traditional plug installation and removal being complicated and the shielding affecting the spraying effect can be avoided, paint solidification blockage can be effectively prevented, and the equipment maintenance frequency can be reduced.

Description

Technical Field

[0001] This application relates to the technical field of spraying equipment, and more particularly to a spraying equipment for electric vehicle wheel hubs. Background Technology

[0002] In the field of electric vehicle manufacturing, forming a uniform and dense coating on the surface of the wheel hub can improve its corrosion resistance, wear resistance, and impact resistance, thus extending its service life. In related technologies, the painting of electric vehicle wheel hubs usually adopts an assembly line operation mode. The wheel hubs to be painted are sent into a closed spraying chamber by a conveyor line (such as a chain conveyor or roller conveyor). The spraying chamber is equipped with spray guns, which spray paint onto the outer surface of the wheel hub, the gap between the spokes, and other areas according to a preset program to achieve the painting of the electric vehicle wheel hub. However, in this process, since a center hole for assembly with the axle needs to be opened in the center of the wheel hub, if paint droplets enter the center hole and solidify during painting, it will cause the diameter of the center hole to shrink and the roughness of the inner wall to increase, affecting the subsequent assembly accuracy of the wheel hub and the axle.

[0003] To avoid the above situations, existing technologies typically use physical sealing to protect the center hole of the wheel hub. Before the wheel hub enters the spraying chamber, a special rubber, silicone, or plastic plug is inserted into the center hole manually or with the aid of a robotic arm. The plug and the center hole work together to achieve a seal. After the spraying process is completed and the wheel hub is removed from the spraying chamber, the plug is removed and recycled manually or mechanically. However, the installation and removal of the plug requires additional steps, which not only prolongs the spraying cycle of a single wheel hub and reduces production efficiency, but also requires investment in labor costs or the purchase of special disassembly equipment, increasing production costs. Furthermore, the area where the plug and the center hole meet may create a spraying dead zone, resulting in an incomplete or uneven paint film in that area, affecting the overall spraying quality. Summary of the Invention

[0004] This application aims to at least partially address one of the technical problems in the related art.

[0005] Therefore, one objective of this application is to provide an electric vehicle wheel hub spraying device that can protect the center hole of the wheel hub during the conveying process, effectively avoiding the problems of cumbersome installation and disassembly of traditional plugs and the obstruction affecting the spraying effect. In addition, it can also lubricate the channel for the flow of paint droplets, effectively preventing the paint from curing and clogging, and reducing the frequency of equipment maintenance.

[0006] To achieve the above objectives, a first aspect of this application provides an electric vehicle wheel hub painting device, comprising a spraying chamber, a spray gun, a conveying mechanism, an air extraction mechanism, and a placement mechanism. The spray gun and the air extraction mechanism are respectively disposed inside the spraying chamber. The upper end of the spray gun penetrates the spraying chamber and extends to the outside of the spraying chamber. The conveying mechanism horizontally penetrates the spraying chamber. Multiple placement mechanisms are provided, evenly distributed along the length of the conveying mechanism and connected to it in a driving manner. Each placement mechanism includes a placement rod, a placement block, a mounting post, and a trigger module. The placement rod is vertically arranged, and its lower end is connected to the surface of the conveying mechanism in a driving manner. The placement block is fixedly connected to the upper surface of the placement rod, and the mounting post is fixedly connected to the upper surface of the placement block, with the axis of the mounting post collinear with the axis of the placement rod. The trigger module is disposed inside the placement rod, and a portion of the trigger module extends into the placement block and the mounting post.

[0007] The electric vehicle wheel hub spraying equipment of this application embodiment can protect the center hole of the wheel hub during the conveying process, effectively avoiding the problems of cumbersome installation and disassembly of traditional plugs and the obstruction affecting the spraying effect. It can also lubricate the channel for the flow of paint droplets, effectively preventing the paint from curing and clogging, and reducing the frequency of equipment maintenance.

[0008] In addition, the electric vehicle wheel hub painting equipment proposed in this application may also have the following additional technical features:

[0009] In one embodiment of this application, the trigger module includes a trigger rod, a spring, and an adjusting plate. The placement rod has an internal mounting cavity, and the mounting post and placement block have internal temporary storage cavities communicating with the mounting cavity. The adjusting plate is slidably connected to the inner wall of the mounting cavity. The upper end of the trigger rod is fixedly connected to the bottom of the adjusting plate, and the lower end of the trigger rod extends through the placement rod. The spring is sleeved on the surface of the trigger rod, with its upper end fixedly connected to the bottom of the adjusting plate and its lower end fixedly connected to the inner wall of the mounting cavity.

[0010] In one embodiment of this application, the placement block is provided with an installation tube that communicates with the temporary storage cavity. The installation tube is provided with a second one-way valve. The other end of the installation tube is fixedly connected to a drainage tube, and the other end of the drainage tube extends through the placement block.

[0011] In one embodiment of this application, the mounting column has a connecting cavity inside, the mounting column has an inlet cavity communicating with the connecting cavity on its surface, and the placement block has a discharge cavity communicating with the connecting cavity at its bottom.

[0012] In one embodiment of this application, the interior of the temporary storage cavity is provided with a spray hole that communicates with the inlet cavity, and a first one-way valve is fixedly connected to the inner wall of the spray hole.

[0013] In one embodiment of this application, the trigger module further includes a mounting plate fixedly connected to the inner wall of the spraying chamber. The top of the mounting plate is provided with a connecting groove, and the inner wall of the connecting groove is fixedly connected with uniformly distributed guide blocks. The lower end of the trigger rod extends into the interior of the connecting groove.

[0014] In one embodiment of this application, the air extraction mechanism includes two guide plates, two connecting plates, two mounting shells, and two sets of fans. The two guide plates are fixedly connected to the interior of the spraying chamber and are symmetrically distributed. The two connecting plates are fixedly connected to the interior of the spraying chamber and are respectively located below the two guide plates. A collection cavity is formed between the guide plates and the adjacent connecting plates. A guide pipe communicating with the collection cavity is connected to the surface of the spraying chamber. The two mounting shells are respectively fixedly connected to both sides of the spraying chamber. The two sets of fans are respectively disposed inside the two mounting shells.

[0015] In one embodiment of this application, the side of the mounting shell away from the spray chamber is connected to a connecting pipe, and the bottom of the guide plate is provided with an exhaust channel connected to the mounting shell.

[0016] Compared with the prior art, the beneficial effects of this application are as follows:

[0017] 1. The negative pressure airflow generated by the suction mechanism actively guides and sucks away the paint droplets sprayed towards the center hole of the wheel hub, replacing the traditional physical plug. This not only avoids the spraying dead corners caused by the installation of plugs, ensuring the integrity and uniformity of the paint film around the center hole of the wheel hub and improving the spraying quality; at the same time, it also eliminates the process of installing and removing plugs, simplifies the operation process, and effectively improves production efficiency.

[0018] 2. By linking the trigger module in the placement mechanism with the conveying mechanism, lubricating liquid is automatically sprayed onto the inner wall of the paint flow channel when the hub enters the spraying chamber, keeping it moist and effectively preventing the paint from sticking and hardening. At the same time, the mechanism can automatically replenish the liquid when the hub is removed, forming a continuous self-cleaning cycle. This avoids the industry problem of traditional airflow channels being easily blocked by paint, reducing the maintenance frequency and cost of the equipment.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0021] Figure 1 This is a schematic diagram of an electric vehicle wheel hub spraying device according to an embodiment of this application;

[0022] Figure 2 This is a cross-sectional schematic diagram of an electric vehicle wheel hub spraying apparatus according to an embodiment of this application;

[0023] Figure 3 for Figure 2 Enlarged view of A in the middle;

[0024] Figure 4 This is a schematic diagram of the structure of the electric vehicle wheel hub spraying equipment placement mechanism according to an embodiment of this application;

[0025] Figure 5 for Figure 4 Enlarged view of B in the middle;

[0026] Figure 6 This is a schematic diagram showing the connection of the drain pipe, the mounting pipe, and the second check valve of an electric vehicle wheel hub spraying equipment according to an embodiment of this application.

[0027] Figure 7 This is a schematic diagram showing the distribution of guide blocks in an electric vehicle wheel hub painting equipment according to an embodiment of this application.

[0028] As shown in the figure: 1. Spraying chamber; 101. Spray gun; 2. Conveying mechanism; 3. Air extraction mechanism; 301. Guide plate; 302. Connecting plate; 303. Air extraction channel; 304. Fan; 305. Mounting shell; 306. Connecting pipe; 4. Placement mechanism; 401. Placement rod; 402. Trigger rod; 403. Spring; 404. Adjusting plate; 405. Placement block; 406. Mounting column; 407. Discharge chamber; 408. Drainage pipe; 409. Inlet chamber; 410. Connecting chamber; 411. Temporary storage chamber; 412. Spray hole; 413. First one-way valve; 414. Mounting pipe; 415. Second one-way valve; 416. Mounting plate; 417. Connecting groove; 418. Guide block. Detailed Implementation

[0029] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0030] The electric vehicle wheel hub spraying equipment of this application embodiment will now be described with reference to the accompanying drawings.

[0031] like Figures 1-7 As shown, the electric vehicle wheel hub painting equipment of this application embodiment may include a spraying chamber 1, a spray gun 101, a conveying mechanism 2, an air extraction mechanism 3, and a placement mechanism 4.

[0032] The spray gun 101 and the air extraction mechanism 3 are respectively located inside the spraying chamber 1. The upper end of the spray gun 101 passes through the spraying chamber 1 and extends to the outside of the spraying chamber 1. The conveying mechanism 2 passes horizontally through the spraying chamber 1. There are multiple placement mechanisms 4. The multiple placement mechanisms 4 are evenly distributed along the length direction of the conveying mechanism 2 and are connected to the conveying mechanism 2 in a transmission manner.

[0033] The placement mechanism 4 may include a placement rod 401, a placement block 405, a mounting post 406, and a trigger module.

[0034] The placement rod 401 is vertically arranged, and its lower end is connected to the surface of the conveying mechanism 2. The placement block 405 is fixedly connected to the upper end face of the placement rod 401. The mounting column 406 is fixedly connected to the upper end face of the placement block 405, and the axis of the mounting column 406 is collinear with the axis of the placement rod 401. The trigger module is located inside the placement rod 401, and part of the structure of the trigger module extends into the placement block 405 and the mounting column 406.

[0035] Specifically, the placement mechanism 4 is conveyed by the conveying mechanism 2, and the placement mechanism 4 is used to place the wheel hub. The placement block 405 is set to support the wheel hub, and the mounting column 406 can pass through the center hole of the wheel hub. During the process of the conveying mechanism 2 driving the placement mechanism 4 to move, the wheel hub can be moved synchronously. During the process of entering the spraying chamber 1, the wheel hub can be sprayed by the spray gun 101.

[0036] In one embodiment of this application, such as Figures 4-7 As shown, the trigger module may include a trigger rod 402, a spring 403, and an adjustment plate 404.

[0037] The placement rod 401 has an internal mounting cavity, and the mounting column 406 and the placement block 405 have internal temporary storage cavities 411 that communicate with the mounting cavity. The adjusting plate 404 is slidably connected to the inner wall of the mounting cavity. The upper end of the trigger rod 402 is fixedly connected to the bottom of the adjusting plate 404, and the lower end of the trigger rod 402 extends through the placement rod 401. The spring 403 is sleeved on the surface of the trigger rod 402, and the upper end of the spring 403 is fixedly connected to the bottom of the adjusting plate 404. The lower end of the spring 403 is fixedly connected to the inner wall of the mounting cavity.

[0038] Specifically, the spring 403 is used to hold the position of the trigger rod 402, thereby holding the position of the adjusting plate 404. By pushing the trigger rod 402, the adjusting plate 404 can be moved synchronously. After releasing the trigger rod 402, the trigger rod 402 and the adjusting plate 404 can be reset synchronously under the action of the spring 403.

[0039] In one embodiment of this application, such as Figures 4-7 As shown, the placement block 405 is provided with an installation tube 414 that communicates with the temporary storage chamber 411. The installation tube 414 is provided with a second one-way valve 415. The other end of the installation tube 414 is fixedly connected to a drainage tube 408, and the other end of the drainage tube 408 passes through the placement block 405.

[0040] Specifically, the second one-way valve 415 ensures the flow of liquid inside the installation tube 414, allowing liquid to enter the installation tube 414 only through the drainage tube 408 and pass through the second one-way valve 415 into the storage chamber 411. The drainage tube 408 is a flexible hose. By pushing the trigger rod 402, the adjusting plate 404 can move synchronously. During this process, the adjusting plate 404 can squeeze the liquid inside the storage chamber 411 and discharge it. After the liquid is discharged, the trigger rod 402 and the adjusting plate 404 are reset. At this time, due to the discharge of liquid inside the storage chamber 411, a negative pressure is formed inside, and liquid can be drawn through the drainage tube 408 and injected into the storage chamber 411 for storage.

[0041] In one embodiment of this application, such as Figures 4-7 As shown, the mounting post 406 has a connecting cavity 410 inside, and the surface of the mounting post 406 has an inlet cavity 409 that communicates with the connecting cavity 410. The bottom of the placement block 405 has a discharge cavity 407 that communicates with the connecting cavity 410. The interior of the temporary storage cavity 411 has a spray hole 412 that communicates with the inlet cavity 409. The inner wall of the spray hole 412 is fixedly connected to a first one-way valve 413.

[0042] Specifically, by pushing the trigger rod 402, the adjusting plate 404 can be moved synchronously. During this process, the liquid inside the temporary storage chamber 411 can be squeezed by the adjusting plate 404, and the liquid stored inside can be discharged through the spray hole 412. The first one-way valve 413 can restrict the flow direction of the liquid inside. The liquid sprayed through the spray hole 412 can be injected into the interior of the inlet chamber 409 to moisten the interior of the inlet chamber 409. The liquid can flow through the inlet chamber 409 to the connecting chamber 410 and finally be discharged through the discharge chamber 407.

[0043] In one embodiment of this application, such as Figures 4-7As shown, the trigger module may also include a mounting plate 416 fixedly connected to the inner wall of the spray chamber 1. A connecting groove 417 is provided on the top of the mounting plate 416. Evenly distributed guide blocks 418 are fixedly connected to the inner wall of the connecting groove 417. The lower end of the trigger rod 402 extends into the interior of the connecting groove 417.

[0044] Specifically, during the process of the conveying mechanism 2 driving the placement rod 401 through the interior of the spraying chamber 1, the trigger rod 402 can slide along the inner wall of the connecting groove 417 and be guided by the guide block 418. In turn, the guide block 418 can push the trigger rod 402 upward to achieve the effect of squeezing the liquid inside the temporary storage chamber 411. When the trigger rod 402 separates from the guide block 418, it can be reset under the action of the spring 403, so that it can draw liquid from the drainage tube 408.

[0045] In one embodiment of this application, such as Figure 2 and Figure 3 As shown, the air extraction mechanism 3 may include two guide plates 301, two connecting plates 302, two mounting shells 305, and two sets of fans 304.

[0046] Two guide plates 301 are fixedly connected to the inside of the spray chamber 1 and are symmetrically distributed. Two connecting plates 302 are fixedly connected to the inside of the spray chamber 1 and are located below the two guide plates 301 respectively. A collection cavity is formed between the guide plates 301 and the adjacent connecting plates 302. A guide pipe connected to the collection cavity is connected to the surface of the spray chamber 1. Two mounting shells 305 are fixedly connected to both sides of the spray chamber 1 respectively. Two sets of fans 304 are respectively installed inside the two mounting shells 305.

[0047] Specifically, the guide pipe is designed to introduce cleaning water, and during the movement of the placement mechanism 4, the guide pipe 408 can enter the collection chamber, thereby drawing in the cleaning water in the collection chamber.

[0048] In one embodiment of this application, such as Figure 2 and Figure 3 As shown, the side of the mounting housing 305 away from the spray chamber 1 is connected to a connecting pipe 306, and the bottom of the guide plate 301 is provided with an exhaust channel 303 that is connected to the mounting housing 305.

[0049] Specifically, by starting the fan 304, air from the collection chamber can be drawn into the mounting housing 305 through the air extraction channel 303. The connecting pipe 306 allows this air to be discharged and heated for drying the paint in the next process. During the air extraction process, the air around the mounting column 406 is actively drawn into the inlet chamber 409 and then into the collection chamber through the connecting chamber 410 and the outlet chamber 407. In this process, the liquid sprayed from the nozzle 412 is accelerated, and the paint is drawn into the inlet chamber 409 by the airflow when it is close to the center hole, preventing the paint from affecting the use of the wheel hub. The gas sprayed into the inlet chamber 409 by the nozzle 412 is used to enhance the fluidity of the paint and prevent the paint from sticking to the inside of the inlet chamber 409 and gradually accumulating, affecting subsequent use.

[0050] Specifically, the working principle of this application is as follows:

[0051] Center hole spraying protection principle: The fan 304 works continuously, and a negative pressure is formed in the collection chamber below the guide plate 301 through the air extraction channel 303. This negative pressure airflow will actively guide the paint droplets that drift towards the center hole of the hub during spraying. The airflow carries the paint droplets and is sucked into the collection chamber along the liquid-wet inlet chamber 409, connecting chamber 410 and outlet chamber 407. Finally, the gas is discharged through the connecting pipe 306, while the paint and liquid enter the collection chamber and are discharged with the flow of cleaning water. This process uses airflow to actively capture paint that may enter the center hole, avoiding paint accumulation in the hole.

[0052] Paint discharge principle: When the conveyor mechanism 2 carries the hub into the spray chamber 1, the guide block 418 fixed on the mounting plate 416 inside the spray chamber 1 pushes the trigger rod 402 upward. The trigger rod 402 drives the adjusting plate 404 to compress the spring 403 and move upward, squeezing the liquid pre-stored in the temporary storage chamber 411. The pressurized liquid opens the first one-way valve 413 and is sprayed into the inlet chamber 409 on the surface of the mounting column 406 through the spray nozzle 412. This action pre-wets the inlet chamber 409. The adjustment plate 404 moves down after the trigger rod 402 is reset by the spring 403, creating a negative pressure in the temporary storage chamber 411. The negative pressure draws out the cleaning liquid from the drainage pipe 408 extending into the collection chamber of the suction mechanism 3 through the installation pipe 414 and the second one-way valve 415, refilling the temporary storage chamber 411. This allows the cleaning liquid to be continuously injected into the inlet chamber 409 to keep its inner wall moist, facilitating the discharge of the collected paint.

[0053] In summary, the electric vehicle wheel hub painting equipment of this application embodiment can protect the center hole of the wheel hub during the conveying process, effectively avoiding the problems of cumbersome installation and disassembly of traditional plugs and the obstruction affecting the painting effect. In addition, it can also lubricate the channel for the flow of paint droplets, effectively preventing the paint from curing and clogging, and reducing the frequency of equipment maintenance.

[0054] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0056] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An electric vehicle wheel hub spraying equipment, characterized in that, It includes a spray booth, spray guns, a conveying mechanism, an air extraction mechanism, and a placement mechanism, among which, The spray gun and the air extraction mechanism are respectively disposed inside the spraying chamber. The upper end of the spray gun penetrates through the spraying chamber and extends to the outside of the spraying chamber. The conveying mechanism passes horizontally through the spraying chamber. The placement mechanism is provided in multiple ways, and the multiple placement mechanisms are evenly distributed along the length direction of the conveying mechanism and are connected to the conveying mechanism in a driving manner. The placement mechanism includes a placement rod, a placement block, a mounting post, and a trigger module, wherein... The placement rod is vertically arranged, and the lower end of the placement rod is connected to the surface of the conveying mechanism in a transmission manner; The placement block is fixedly connected to the upper end face of the placement rod, and the mounting column is fixedly connected to the upper end face of the placement block, with the axis of the mounting column being collinear with the axis of the placement rod; The trigger module includes a trigger rod, a spring, and an adjustment plate, wherein, The placement rod has an internal installation cavity, the installation column and the placement block have internal temporary storage cavities that communicate with the installation cavity, the adjustment plate is slidably connected to the inner wall of the installation cavity, the upper end of the trigger rod is fixedly connected to the bottom of the adjustment plate, and the lower end of the trigger rod extends through the placement rod. The spring is sleeved on the surface of the trigger rod, the upper end of the spring is fixedly connected to the bottom of the adjusting plate, and the lower end of the spring is fixedly connected to the inner wall of the mounting cavity. The placement block has an installation tube that communicates with the temporary storage cavity inside. The other end of the installation tube is fixedly connected to a drainage tube, and the other end of the drainage tube extends through the placement block. The mounting column has a connecting cavity inside, an inlet cavity communicating with the connecting cavity is formed on the surface of the mounting column, and a discharge cavity communicating with the connecting cavity is formed at the bottom of the placement block. The temporary storage cavity has a spray hole that communicates with the inlet cavity; The air extraction mechanism includes two guide plates, two connecting plates, two mounting shells, and two sets of fans, wherein... Both of the aforementioned guide plates are fixedly connected to the interior of the spraying chamber and are symmetrically distributed. Both of the aforementioned connecting plates are fixedly connected to the interior of the spraying chamber and are respectively located below the two of the aforementioned guide plates. A collection cavity is formed between the guide plate and the adjacent connecting plate. The surface of the spraying chamber is connected to a guide pipe that communicates with the collection cavity. The two mounting shells are respectively fixedly connected to both sides of the spraying chamber. The two sets of fans are respectively installed inside the two mounting shells. The bottom of the guide plate is provided with an air extraction channel that communicates with the mounting shell. The guide tube is used to introduce clean water, and it can enter the collection chamber during the movement of the placement mechanism.

2. The electric vehicle wheel hub spraying equipment according to claim 1, characterized in that, The installation pipe is equipped with a second one-way valve.

3. The electric vehicle wheel hub spraying equipment according to claim 1, characterized in that, A first one-way valve is fixedly connected to the inner wall of the nozzle.

4. The electric vehicle wheel hub spraying equipment according to claim 1, characterized in that, The trigger module also includes a mounting plate fixedly connected to the inner wall of the spraying chamber. The top of the mounting plate is provided with a connecting groove, and the inner wall of the connecting groove is fixedly connected with evenly distributed guide blocks. The lower end of the trigger rod extends into the interior of the connecting groove.

5. The electric vehicle wheel hub spraying equipment according to claim 1, characterized in that, The mounting housing is connected to a connecting pipe on the side away from the spraying chamber.

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