Coating apparatus

Abstract

A kind of coating carrier, including at least one carrier unit, the carrier unit includes: positioning carrier plate, the positioning carrier plate includes at least two horizontally arranged positioning rack, multiple positioning tooth slots are arranged on the side of the positioning rack;Support carrier plate assembly, the support carrier plate assembly is located below the positioning carrier plate, the support carrier plate assembly includes support carrier plate and at least one vertically arranged support rack on the support carrier plate, multiple support tooth slots are arranged on the support rack, the opening of the support tooth slot is towards the positioning carrier plate;The projection of adjacent positioning rack on the horizontal plane where the support carrier plate is located is located on the two sides of at least one support rack respectively;To be coated workpiece is loaded between adjacent positioning rack and on the support rack, and is engaged in the positioning tooth slot and the support tooth slot.This embodiment of the utility model provides a coating carrier, which can improve the loading capacity of the workpiece to be coated, and is beneficial to improve the coating efficiency.

Description

Technical Field

[0001] This utility model relates to the field of coating equipment technology, and in particular to a coating carrier. Background Technology

[0002] In coating processes, some products requiring coating need to have minimal or no contact with the coating carrier. Currently, suspended carriers are commonly used to suspend the products before coating. However, suspended products tend to sway, are unstable, and are prone to collisions, leading to damage. Avoiding collisions requires sufficient process space, but the limited space allows for a small number of products to be coated simultaneously, impacting coating efficiency.

[0003] Therefore, there is an urgent need to provide a coating carrier that can limit the position of the product and has a small contact area with the product. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a coating carrier that can limit the workpiece to be coated, has less contact with the workpiece, and is also conducive to improving coating efficiency.

[0005] To solve the above-mentioned technical problems, this utility model provides a coating carrier, including at least one carrier unit. The carrier unit includes: a positioning carrier plate, which includes at least two horizontally arranged positioning racks, and the positioning racks have multiple positioning grooves on their sides; a support carrier plate assembly, which is located below the positioning carrier plate. The support carrier plate assembly includes a support carrier plate and at least one support rack vertically arranged on the support carrier plate, and the support rack has multiple support grooves with openings facing the positioning carrier plate; the projections of adjacent positioning racks on the horizontal plane of the support carrier plate are respectively located on both sides of at least one support rack; the workpiece to be coated is loaded between adjacent positioning racks and on the support rack, and is engaged in the positioning grooves and the support grooves.

[0006] Optionally, the positioning carrier plate includes two or more positioning racks, and the supporting carrier plate assembly includes multiple supporting racks. Between any two adjacent positioning racks on the horizontal plane where the supporting carrier plate is located, there is one or more supporting racks.

[0007] Optionally, when there is a support rack between the projections of any two adjacent positioning racks on the horizontal plane where the support carrier plate is located, the two positioning grooves on the adjacent positioning racks and the support groove on the support rack form a three-point limiting structure to support the workpiece to be coated.

[0008] Optionally, the positioning carrier plate further includes a first frame, and the positioning rack is disposed within the first frame. The positioning rack is integrally formed with the first frame, or the positioning rack is detachably connected to the first frame.

[0009] Optionally, the support plate includes a second frame and a support strip disposed within the second frame, with the support rack vertically mounted on the support strip.

[0010] Optionally, the support bar is provided with multiple mounting slots, and the bottom of the support rack is provided with multiple teeth corresponding to the mounting slots, the teeth engaging in the mounting slots.

[0011] Optionally, after the locking teeth engage in the mounting slot, the locking teeth are also welded to the bearing strip.

[0012] Optionally, the first frame and the second frame are detachably connected.

[0013] Optionally, the shape of the positioning tooth groove includes a V-shape, a U-shape, or a square; the shape of the supporting tooth groove includes a V-shape, a U-shape, or a square.

[0014] Optionally, the depth of the positioning groove is between 1mm and 3mm; the depth of the supporting groove is between 3mm and 5mm.

[0015] Optionally, when there are multiple vehicle units, the multiple vehicle units are stacked in the vertical direction and adjacent vehicle units are interconnected.

[0016] Optionally, it also includes a support column, the top of which is connected to the upper-level vehicle unit, and the bottom of which is connected to the lower-level vehicle unit.

[0017] Optionally, it also includes a limiting post, wherein the carrier unit is provided with a limiting part corresponding to the limiting post. When multiple carrier units are stacked, one end of the limiting post is connected to one layer of the adjacent carrier units, and the other end of the limiting post passes through the limiting part on another layer of the carrier unit.

[0018] Optionally, a tapered guide portion is provided on one end of the limiting post that passes through the limiting portion.

[0019] Optionally, the limiting part is disposed on the support plate of the vehicle unit. When multiple vehicle units are stacked, one end of the limiting post is connected to the positioning plate of the lower vehicle unit, and the other end of the limiting post passes through the limiting part on the upper vehicle unit.

[0020] Optionally, the limiting part is disposed on the positioning plate of the vehicle unit. When multiple vehicle units are stacked, one end of the limiting post is connected to the support plate of the upper vehicle unit, and the other end of the limiting post passes through the limiting part on the lower vehicle unit.

[0021] Compared with the prior art, the technical solution of this utility model embodiment has the following beneficial effects:

[0022] The coating carrier provided by this technical solution has multiple positioning grooves on the positioning rack and multiple support grooves on the support rack. Vertically, the positioning rack is positioned above the support rack. Horizontally, at least one support rack is positioned between adjacent positioning racks. When the workpiece to be coated is loaded onto the coating carrier, the left and right sides of the workpiece can engage with the positioning grooves of adjacent positioning racks, and the lower side of the workpiece can engage with the lower support groove, thus fixing its position. Furthermore, the coating carrier only contacts the workpiece through the positioning and support grooves, resulting in a very small contact point and minimal obstruction of the workpiece, making it suitable for products requiring minimal contact with the coating carrier. Additionally, the multiple positioning grooves on the positioning rack and the multiple support grooves on the support rack allow for the placement of multiple workpieces even with only two positioning racks and one support rack, preventing collisions between the workpieces and increasing the loading capacity, thereby improving coating efficiency.

[0023] Furthermore, when there are multiple carrier units, these units are stacked vertically and adjacent units are interconnected. Simultaneously arranging multiple carrier units vertically maximizes space utilization, further increasing the loading capacity of the product to be coated and improving coating efficiency.

[0024] Furthermore, it also includes a limiting post. The carrier unit is provided with a limiting part corresponding to the limiting post. When multiple carrier units are stacked, one end of the limiting post is connected to one layer of adjacent carrier units, and the other end of the limiting post passes through the limiting part on another layer of carrier units. The cooperation between the limiting post and the limiting part allows the upper and lower layers of carrier units to be aligned vertically without detaching from each other. Moreover, compared to the traditional shaft-hole interlocking connection method, the limiting post and limiting part of this solution are easier to install and separate, and also easier to clean. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the vehicle unit in one embodiment of the present invention;

[0026] Figure 2This is a schematic diagram of the positioning carrier plate in one embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the positioning carrier plate in another embodiment of the present invention;

[0028] Figure 4 This is an exploded structural diagram of the support carrier assembly in one embodiment of the present invention;

[0029] Figure 5 yes Figure 4 A schematic diagram of the planar structure of the rack support shown, and a magnified view of the part within the circle;

[0030] Figure 6 yes Figure 4 A schematic diagram of the planar structure of the supporting plate and a magnified view of the part within the circle;

[0031] Figure 7 This is a schematic diagram of the installation structure of multiple vehicle units in one embodiment of this utility model. Detailed Implementation

[0032] As described in the background section, currently commonly used suspended coating carriers are prone to collisions between the coating products they carry. To avoid collisions, the only options are to expand the process space or reduce the product load, resulting in a weak competitive advantage for coating carriers.

[0033] To address the aforementioned problems, this utility model provides a coating carrier, comprising at least one coating unit. The coating unit includes a positioning carrier plate and a support carrier plate located below the positioning carrier plate. At least two positioning racks are horizontally arranged on the positioning carrier plate, and multiple positioning grooves are provided on the sides of the positioning racks. At least one support rack is vertically arranged on the support carrier plate, and multiple support grooves are provided on the support rack. Horizontally, the two positioning racks are located on opposite sides of the support rack. When the workpiece to be coated is loaded onto the coating carrier, it is positioned between two adjacent positioning racks and above the support rack, and is engaged within the positioning and support grooves. This provides three-way positioning of the workpiece, ensuring its stability and preventing collisions when multiple workpieces are loaded. Furthermore, the contact between the coating carrier and the workpiece is limited to the positioning and support grooves, resulting in a small contact area, which facilitates full coating of the workpiece. In addition, multiple positioning grooves and multiple supporting grooves can be used to support multiple workpieces to be coated, which greatly increases the loading capacity of the workpieces to be coated and helps to improve coating efficiency.

[0034] To make the above-mentioned objectives, features and beneficial effects of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0035] Figure 1 This is a schematic diagram of the structure of the vehicle unit in one embodiment of the present invention; Figure 2 This is a schematic diagram of the positioning carrier plate in one embodiment of the present invention; Figure 3 This is a schematic diagram of the positioning carrier plate in another embodiment of the present invention; Figure 4 This is an exploded structural diagram of the support carrier assembly in one embodiment of the present invention; Figure 5 yes Figure 4 A schematic diagram of the planar structure supporting the rack; Figure 6 yes Figure 4 The diagram shows a planar structure of the supporting plate.

[0036] Reference Figures 1 to 4 The coating carrier 1 includes at least one carrier unit 10, which includes: a positioning carrier plate 100, which includes at least two horizontally arranged positioning racks 101, and multiple positioning grooves 102 on the sides of the positioning racks 101; a support carrier plate assembly 200, which is located below the positioning carrier plate 100, and includes a support carrier plate 201 and at least one support rack 202 vertically arranged on the support carrier plate 201, with multiple support grooves 203 on the support rack 202, the openings of which face the positioning carrier plate 100; the projections of adjacent positioning racks 101 on the horizontal plane of the support carrier plate 201 are respectively located on both sides of at least one support rack 202; and a workpiece 20 to be coated (please refer to...). Figure 7 It is loaded between adjacent positioning racks 101 and on the support rack 202, and engages in the positioning groove 102 and the support groove 203.

[0037] In the aforementioned coating carrier 1, the positioning carrier plate 100 is located above the support carrier plate assembly 200 in the vertical direction. In the horizontal direction, the projections of adjacent positioning racks 101 onto the horizontal plane where the support carrier plate 201 is located are respectively located on both sides of at least one support rack 202. When the workpiece 20 to be coated is loaded onto the coating carrier 1, the workpiece 20 is located between two adjacent positioning racks 101 and above the support rack 202, restricting the workpiece 20 in three directions, thereby achieving positional fixation. In addition, the workpiece 20 is engaged in the positioning grooves 102 and the support grooves 203, further restricting the workpiece 20 from swaying back and forth or tilting left and right. Furthermore, the contact area between the carrier unit 10 and the workpiece 20 is very small, making it suitable for loading coating products that require minimal contact with the coating carrier.

[0038] In some embodiments, the coating carrier 1 is adapted to some plate-shaped components, including PCBA boards (printed circuit boards), etc.

[0039] In this embodiment, the positioning rack 101 is horizontally arranged, that is, the positioning rack 101 is parallel to the horizontal plane where the positioning carrier plate 100 is located, the opening direction of the positioning groove 102 on the positioning rack 101 is parallel to the horizontal plane, and the openings of the positioning groove 102 on the opposite sides of the adjacent positioning rack 101 are facing each other.

[0040] Specifically, the positioning rack 101 includes a first side 101a and a second side 101b, two adjacent positioning racks 101, wherein the first side 101a of one positioning rack 101 is opposite to the second side 101b of the other positioning rack 101, and the opening of the positioning groove 102 provided on the first side 101a of one positioning rack 101 is facing the opening of the positioning groove 102 provided on the second side 101b of the other positioning rack 101.

[0041] When there are two or more positioning racks 101, a positioning groove 102 is provided on the side of the positioning rack 101 located at the edge near the middle, and positioning grooves are provided on both sides of the positioning rack located in the middle.

[0042] In this embodiment, the support rack 202 is arranged perpendicular to the support carrier plate 201, and the opening of the support groove 203 on the support rack 202 faces the positioning carrier plate 100.

[0043] Therefore, when the workpiece 20 to be coated is placed on the carrier unit 10, the bottom of the workpiece 20 to be coated can be engaged with the support tooth groove 203, and the two sides of the workpiece 20 to be coated can be engaged with the positioning tooth grooves 102 on both sides, so as to fix the position and prevent it from swaying left and right or tilting back and forth. When multiple workpieces 20 to be coated are loaded at the same time, they will not collide with each other.

[0044] In some embodiments, the positioning carrier plate 100 includes two or more positioning racks 101, which are spaced apart and arranged side by side; the supporting carrier plate assembly 200 includes a plurality of supporting racks 202, which are spaced apart and arranged side by side, and one or more supporting racks 202 are provided between the projections of any two adjacent positioning racks 101 on the horizontal plane where the supporting carrier plate 201 is located.

[0045] In this embodiment, there is only one support rack 202 between any two adjacent positioning racks 101 on the horizontal plane where the support carrier plate 201 is located. By selecting two positioning grooves 102 on adjacent positioning racks 101 and one support groove 203 on the support rack 202, a three-point limiting structure can be formed to support the workpiece 20 to be coated.

[0046] The positioning rack 101 is provided with multiple positioning grooves 102, and the support rack 202 is provided with multiple support grooves 202. Only two positioning grooves 102 and one support groove 202 are needed to fix one workpiece 20 to be coated. Therefore, multiple workpieces 20 to be coated can be loaded at the same time, which greatly increases the loading capacity of coated products and effectively improves the coating efficiency.

[0047] In other embodiments, there may be two or more support racks 202 between the projections of any two adjacent positioning racks 101 on the horizontal plane where the support carrier plate 201 is located. In this case, the bottom of the workpiece 20 to be coated has multiple support grooves 203 to provide support, which makes the support more stable and suitable for some larger workpieces to be coated.

[0048] In this embodiment, the multiple positioning racks 101 are arranged at equal intervals; in other embodiments, the positioning racks 101 may also be arranged at unequal intervals, which can be determined according to the size of the workpiece to be coated.

[0049] In this embodiment, the multiple support racks 202 are equally spaced; in other embodiments, the support racks 202 may also be unequally spaced, which can be set according to the actual process conditions. For example, it can be determined according to the spacing of the positioning racks 101, and should be located in the middle of two adjacent positioning racks 101 as much as possible. If the positioning racks 101 are not unequally spaced, the spacing of the support racks 202 will be adjusted accordingly.

[0050] In some embodiments, the depth of the positioning groove 102 is between 1 mm and 3 mm. The depth of the positioning groove 102 is set within this range, which can prevent the workpiece 20 to be coated from coming out of the positioning groove 102, and also avoid the positioning groove 102 from blocking the workpiece 20 to be coated too much, so as not to cause damage to the workpiece 20 to be coated during the picking and placing process.

[0051] In some embodiments, the depth of the support groove 203 is between 3mm and 5mm. The depth of the support groove 203 can be set according to the height of the positioning groove 102. If the height of the positioning groove 102 is higher above the center of gravity of the workpiece 20 to be coated, the depth of the support groove 203 can be appropriately shallower; if the height of the positioning groove 102 is lower below the center of gravity of the workpiece 20 to be coated, the depth of the support groove 203 is correspondingly deeper to ensure that the workpiece 20 to be coated will not come out and tip over. In addition, within this range, the depth of the support groove 203 can also ensure the processing accuracy requirements of the support rack 202 and prevent deformation during use.

[0052] In this embodiment, the vertical distance between the positioning carrier plate 100 and the supporting carrier plate 201 can be set according to the actual process. For example, if the coating carrier 1 is usually used for workpieces with a relatively high height, the distance between the positioning carrier plate 100 and the supporting carrier plate 201 can be larger to prevent the supporting position of the positioning groove 102 from being too low and unable to provide good support; if the coating carrier 1 is usually used for workpieces with a relatively low height, the distance between the positioning carrier plate 100 and the supporting carrier plate 201 can be set smaller to prevent the supporting position of the positioning groove 102 from being too high and unable to support the workpiece to be coated.

[0053] In some embodiments, the positioning groove 102 is a V-shaped groove, a U-shaped groove, or a square groove, etc.; the supporting groove 202 is a V-shaped groove, a U-shaped groove, or a square groove, etc.

[0054] refer to Figure 2 In one embodiment, the positioning carrier plate 100 further includes a first frame 110, and the positioning rack 101 is disposed in the first frame 110, and the positioning rack 101 is integrally formed with the first frame 110.

[0055] The positioning rack 101 and the first frame 110 are integrally formed, the coating carrier has a simple structure, low manufacturing cost, and is easier to clean and maintain after coating.

[0056] refer to Figure 3 In another embodiment, the positioning rack 101 is detachably connected to the first frame 110.

[0057] In some embodiments, the end of the positioning rack 101 and the first frame 110 may be connected by bolts, screws, rivets or snap-fits.

[0058] The positioning rack 101 and the first frame 110 are detachably connected, making it easy to replace the positioning rack 101. The positioning rack 101 can be replaced according to different coating products, making the coating carrier more versatile.

[0059] refer to Figures 4 to 6 The support plate 201 includes a second frame 210 and a support bar 220 disposed within the second frame 210, and the support rack 202 is vertically mounted on the support bar 220.

[0060] In this embodiment, the second frame 210 is provided with multiple support bars 220, and each support bar 220 is equipped with a support rack 202.

[0061] In this embodiment, the support bar 220 is provided with a plurality of mounting slots 221, and the bottom of the support rack 202 is provided with a plurality of teeth 222 corresponding to the mounting slots 221, and the teeth 222 engage in the mounting slots 221.

[0062] The mounting slot 221 fixes the tooth 222, ensuring that the support rack 202 will not deform or tilt.

[0063] In this embodiment, after the locking teeth 222 engage with the mounting slot 221, the locking teeth 222 are also welded to the support strip 220. Welding further enhances the stability of the support rack 202, ensuring that the support rack 202 provides sufficient support for the workpiece 20 to be coated.

[0064] In this embodiment, the positioning carrier plate 100 and the support carrier plate 201 are interconnected. Specifically, the first frame 110 and the second frame 210 are detachably connected.

[0065] In this embodiment, the first frame 110 and the second frame 220 are connected by bolts.

[0066] In this embodiment, the first frame 110 and the second frame 220 are the same size and shape, both being fan-shaped.

[0067] In other embodiments, the first frame 110 and the second frame 220 may also be circular, square, or other shapes, depending on the actual process requirements.

[0068] Figure 7 This is a schematic diagram of the installation structure of multiple vehicle units in one embodiment of this utility model.

[0069] refer to Figure 7 When there are multiple vehicle units 10, the multiple vehicle units 10 are stacked in the vertical direction and adjacent vehicle units 10 are connected to each other.

[0070] In this embodiment, specifically, the support plate 201 of the upper vehicle unit 10 is connected to the positioning plate 100 of the lower vehicle unit 10.

[0071] Continue to refer to Figure 7 The coating carrier 1 includes a support column 300, the top of which is connected to the carrier unit 10 located on the upper layer, and the bottom of which is connected to the carrier unit 10 located on the lower layer.

[0072] Specifically, the top of the support column 300 is connected to the support plate 201 of the upper vehicle unit 10, and the bottom of the support column 300 is connected to the positioning plate 100 of the lower vehicle unit 10.

[0073] In this embodiment, the bottom of the support column 300 is bolted to the positioning plate 100 of the lower-level vehicle unit 10, and the top of the support column 300 is connected to the support plate 201 of the upper-level vehicle unit 10 in a planar contact manner. The top of the support column 300 is flat and supports the upper-level vehicle unit 10. This connection method makes the assembly and disassembly of the upper and lower-level vehicle units very convenient.

[0074] Continue to refer to Figure 7 The coating carrier 1 further includes a limiting post 400. The carrier unit 10 is provided with a limiting part 410 corresponding to the limiting post 400. When multiple carrier units 10 are stacked, one end of the limiting post 400 is connected to one layer of the adjacent carrier unit 10, and the other end of the limiting post 400 passes through the limiting part 410 on another layer of the carrier unit 10.

[0075] A tapered guide portion 420 is provided on one end of the limiting post 410 that passes through the limiting part 400.

[0076] In this embodiment, the limiting part 410 is disposed on the support plate 201 of the carrier unit 10. When multiple carrier units 10 are stacked, one end of the limiting post 400 is connected to the positioning plate 100 of the carrier unit 10 located in the lower layer, and the other end of the limiting post 400 passes through the limiting part 410 on the carrier unit 10 located in the upper layer.

[0077] In this embodiment, the bottom of the limiting post 400 is connected to the positioning plate 100 of the lower carrier unit 10, and the top of the limiting post 400 passes through the limiting part 410 on the upper carrier unit 10. A tapered guide part 420 is provided on the top of the limiting post 400. The tapered guide part 420 helps the limiting post 400 to be better positioned at the limiting part 410.

[0078] In this embodiment, the limiting part 410 is an open recess provided at the edge of the second frame 210. The cooperation between the limiting part 410 and the limiting post 400 can align the upper and lower vehicle units 10 in the vertical direction, preventing the upper and lower vehicle units from separating or misaligning with each other.

[0079] In other embodiments, the limiting part 410 may also be disposed on the positioning carrier plate 100 of the carrier unit 10. When multiple carrier units 10 are stacked, one end of the limiting post 400 is connected to the support carrier plate 201 of the upper carrier unit 10, and the other end of the limiting post 400 passes through the limiting part 410 of the lower carrier unit 10.

[0080] In this embodiment, the top of the limiting post 400 is connected to the support plate 201 of the upper carrier unit 10, the bottom of the limiting post 400 passes through the limiting part 410 on the lower carrier unit 10, and the bottom of the limiting post 400 is provided with a tapered guide part 420.

[0081] In this embodiment, the limiting portion 410 is an open recess located at the edge of the first frame 110.

[0082] This embodiment of the utility model uses support columns 300 to support the upper and lower carrier units 10, and uses the cooperation of limiting columns 400 and 410 to align them. Compared with the traditional shaft hole plug connection method, the structure is simpler, there are fewer dead corners for cleaning, and it is easier to disassemble and clean and maintain.

[0083] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A coating carrier, characterized in that, Includes at least one vehicle unit, the vehicle unit comprising: A positioning carrier plate, the positioning carrier plate including at least two horizontally arranged positioning racks, and multiple positioning grooves are provided on the side of the positioning racks; A support carrier assembly is located below the positioning carrier. The support carrier assembly includes a support carrier and at least one support rack vertically disposed on the support carrier. The support rack is provided with a plurality of support grooves, the openings of which face the positioning carrier. The projections of adjacent positioning racks on the horizontal plane where the support plate is located are respectively located on both sides of at least one of the support racks; The workpiece to be coated is loaded between adjacent positioning racks and on the support rack, and is engaged in the positioning groove and the support groove.

2. The coating carrier as described in claim 1, characterized in that, The positioning carrier plate includes two or more positioning racks, and the supporting carrier plate assembly includes multiple supporting racks. Between any two adjacent positioning racks on the horizontal plane where the supporting carrier plate is located, there is one or more supporting racks.

3. The coating carrier as described in claim 2, characterized in that, When there is a support rack between the projections of any two adjacent positioning racks on the horizontal plane where the support carrier plate is located, the two positioning grooves on the adjacent positioning racks and the support groove on the support rack form a three-point limiting structure to support the workpiece to be coated.

4. The coating carrier as described in claim 1, characterized in that, The positioning carrier plate further includes a first frame, and the positioning rack is disposed in the first frame. The positioning rack is integrally formed with the first frame, or the positioning rack is detachably connected to the first frame.

5. The coating carrier as described in claim 4, characterized in that, The support plate includes a second frame and a support bar disposed within the second frame, with the support rack vertically mounted on the support bar.

6. The coating carrier as described in claim 5, characterized in that, The bearing bar is provided with multiple mounting slots, and the bottom of the support rack is provided with multiple teeth corresponding to the mounting slots, the teeth engaging in the mounting slots.

7. The coating carrier as described in claim 6, characterized in that, After the locking teeth engage in the mounting slot, the locking teeth are also welded to the bearing strip.

8. The coating carrier as described in claim 5, characterized in that, The first frame and the second frame are detachably connected.

9. The coating carrier as described in claim 1, characterized in that, The shape of the positioning tooth groove includes V-shape, U-shape or square; the shape of the supporting tooth groove includes V-shape, U-shape or square.

10. The coating carrier as claimed in claim 1, characterized in that, The depth of the positioning groove is between 1mm and 3mm; the depth of the supporting groove is between 3mm and 5mm.

11. The coating carrier as claimed in claim 1, characterized in that, When there are multiple vehicle units, the multiple vehicle units are stacked in the vertical direction and adjacent vehicle units are connected to each other.

12. The coating carrier as described in claim 11, characterized in that, It also includes a support column, the top of which is connected to the upper-level vehicle unit, and the bottom of which is connected to the lower-level vehicle unit.

13. The coating carrier as described in claim 11, characterized in that, It also includes a limiting post, and the vehicle unit is provided with a limiting part corresponding to the limiting post. When multiple vehicle units are stacked, one end of the limiting post is connected to one layer of the adjacent vehicle unit, and the other end of the limiting post passes through the limiting part on another layer of the vehicle unit.

14. The coating carrier as described in claim 13, characterized in that, A tapered guide is provided on one end of the limiting post that passes through the limiting part.

15. The coating carrier as described in claim 13, characterized in that, The limiting part is disposed on the support plate of the vehicle unit. When multiple vehicle units are stacked, one end of the limiting post is connected to the positioning plate of the lower vehicle unit, and the other end of the limiting post passes through the limiting part on the upper vehicle unit.

16. The coating carrier as described in claim 13, characterized in that, The limiting part is disposed on the positioning plate of the vehicle unit. When multiple vehicle units are stacked, one end of the limiting post is connected to the support plate of the upper vehicle unit, and the other end of the limiting post passes through the limiting part on the lower vehicle unit.

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