A uniform spraying device for hard alloy coating of a circular saw blade

By designing a uniform coating spraying device for carbide on circular saw blades, and utilizing the synergistic effect of the suspension component and the rotary drive component, the problem of uneven coating caused by suspended transportation was solved, achieving uniform coating spraying and improving the appearance quality and performance of the circular saw blades.

CN224350756UActive Publication Date: 2026-06-12SUZHOU IND PARK DEWORLD PRECISIONTOOLS CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202521578292.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-28
Publication Date
2026-06-12
Estimated Expiration
2035-07-28

AI Technical Summary

Technical Problem

In the current process of applying carbide coating to circular saw blades, the suspended transport causes the saw blades to shake, resulting in uneven coating thickness, with some areas being too thick, too thin, or missing coatings, which affects the appearance quality and performance.

Method used

Design a uniform coating device for carbide coating on circular saw blades, including a coating component and a transport component. The transport component drives the circular saw blade through a suspension component. An elastic extrusion component and a rotary drive component are installed on the suspension component. The pressing component limits the elastic extrusion component, and the rotary drive component drives the suspension component to rotate, so as to achieve stable positioning and rotary coating.

Benefits of technology

It effectively prevents the coating from being too thick, too thin, or missed in certain areas, ensuring the appearance quality and performance of the circular saw blade and extending its service life.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224350756U_ABST
    Figure CN224350756U_ABST
Patent Text Reader

Abstract

The utility model discloses a kind of hard alloy coating uniform spraying devices of circular saw blade, it is related to circular saw blade production technical field.The utility model includes spraying assembly and transport component, the transport component is through spraying assembly, and the transport end of transport component is provided with a plurality of suspension assembly, the surface of suspension assembly is provided with elastic extrusion assembly, and the inside of spraying assembly is provided with pressing assembly.The utility model is sent into the inside of spraying assembly by transport component after suspension assembly, and pressing assembly presses elastic extrusion assembly, at this time, suspension assembly and elastic extrusion assembly synergistic effect, can be firmly positioned to circular saw blade;Rotary drive component drives suspension assembly to drive circular saw blade to rotate simultaneously.The above-mentioned setting makes that circular saw blade moves in spraying assembly and receives spraying, can realize stable rotation;This not only effectively prevents that coating local is too thick, too thin or coating leakage phenomenon, also guarantees the appearance quality, service performance and service life of circular saw blade.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model belongs to the field of circular saw blade production technology, and specifically relates to a device for uniformly spraying a carbide coating on a circular saw blade. Background Technology

[0002] In metal processing, wood processing, and other fields, circular saw blades are important cutting tools, and their performance plays a crucial role in processing quality and efficiency. To improve the hardness and wear resistance of circular saw blades, a spraying process is usually used to prepare a cemented carbide coating on their surface.

[0003] In current carbide coating processes for circular saw blades, a suspended transport device is typically used to move the saw blade into the coating area. However, this suspended configuration easily causes the saw blade to shake during the coating process, resulting in uneven coating material coverage. The consequence is uneven coating thickness, with areas that are too thick, too thin, or even missed areas. This not only affects the appearance quality of the circular saw blade but also significantly reduces its performance and lifespan. Utility Model Content

[0004] To address the problem of wobbling of suspended circular saw blades during the spraying process, this invention proposes a device for uniformly spraying a carbide coating onto circular saw blades, thereby overcoming the aforementioned technical problems in existing related technologies.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is a uniform spraying device for a carbide coating on a circular saw blade, including a spraying component and a transport component. The transport component passes through the spraying component. Several suspension components are provided at the transport end of the transport component. An elastic extrusion component is provided on the surface of the suspension component. A pressing component is provided inside the spraying component. A rotation drive component is provided on the surface of the suspension component and inside the spraying component.

[0007] When the transport component drives the circular saw blade through the interior of the spraying component via the suspension component, the pressing component presses the elastic extrusion component so that the elastic extrusion component limits the circular saw blade on the suspension component, while the rotation drive component drives the suspension component to rotate.

[0008] Furthermore, the spraying assembly includes a spraying box, on both sides of the inner wall of the spraying box several spraying plates are fixedly installed, several spray nozzles are fixedly connected to the inner side of the spraying plates, and branch pipes are fixedly connected to the outer side of the spraying plates. A transport main pipe is provided on the top of the spraying box, and the branch pipes are fixedly connected to the transport main pipe.

[0009] Furthermore, the transport assembly includes a mounting plate, which is fixedly mounted on one side of the spray box. The mounting plate has an installation cavity inside, and a connecting groove is formed on the inner wall of the installation cavity. Several drive rollers are rotatably connected inside the installation cavity. An H-shaped conveyor belt is provided on the outer surface of the drive rollers. A drive motor is fixedly mounted on the top of the mounting plate, and the output end of the drive motor is fixedly connected to the drive rollers.

[0010] Furthermore, the suspension assembly includes a connecting disc, which is fixedly connected to the H-shaped conveyor belt via a connecting groove. Several connecting discs are provided on the outer surface of the H-shaped conveyor belt. A suspension tube is rotatably connected inside the connecting disc, and several suspension hooks are fixedly connected to the outer surface of the suspension tube.

[0011] Furthermore, the elastic extrusion assembly includes a limiting rod disposed on the lower side of the suspension hook. An extrusion groove is formed on the outer surface of the suspension tube corresponding to the limiting rod. An extrusion block is movably connected inside the extrusion groove. An extrusion disc is fixedly connected to one end of the extrusion block and is fixedly connected to the suspension tube. A shielding tube is fixedly connected to the other end of the extrusion block and is sleeved on the outer surface of the suspension tube. The limiting rod is fixedly connected to the shielding tube. An extrusion rod is disposed on the top of the connecting disc and extends into the interior of the suspension tube and is fixedly connected to all the extrusion discs. A tension spring is fixedly connected between the top of the inner wall of the suspension tube and the uppermost extrusion disc.

[0012] Furthermore, the pressing assembly includes a pressing guide frame, which is fixedly installed on the top of the inner wall of the spray box, and a ball bearing is rotatably connected to the top of the extrusion rod.

[0013] Furthermore, the rotary drive assembly includes a gear, which is fixedly connected to the outer surface of the suspension tube, and a toothed plate is fixedly connected to the top of the inner wall of the spray box corresponding to the gear.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this invention, after the suspension assembly is fed into the spraying assembly by the transport assembly, the pressing assembly presses down on the elastic extrusion assembly. At this time, the suspension assembly and the elastic extrusion assembly work together to stably limit the circular saw blade; simultaneously, the rotation drive assembly drives the suspension assembly to rotate the circular saw blade. The above configuration enables the circular saw blade to rotate stably while moving within the spraying assembly and receiving spraying; this not only effectively prevents the coating from being too thick, too thin, or missed, but also ensures the appearance quality, performance, and service life of the circular saw blade.

[0016] 2. In this utility model, when the circular saw blade is hung on the suspension hook, the limiting rod is also inside the inner hole. When the suspension tube moves into the spray box, the extrusion rod presses down on the extrusion plate under the guidance of the guide frame. At this time, the extrusion plate drives the limiting rod to move downward through the extrusion block, extrusion groove and shielding tube, so that the suspension hook and the limiting rod can limit the circular saw blade through the inner hole. When the extrusion rod moves out from inside the guide frame, the pull spring pulls the extrusion rod upward, and at the same time, the limiting rod no longer presses down on the circular saw blade. The above settings make it less likely for the circular saw blade to shake when spraying, and it is also more convenient to pick up and put down the circular saw blade on the suspension hook.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the utility model embodiments, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the external outline structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the suspension assembly structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the transportation component structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the elastic extrusion component structure of this utility model;

[0023] Figure 5 This is a cross-sectional view of the shielding tube of this utility model;

[0024] Figure 6 This is a schematic diagram of the spraying assembly structure of this utility model;

[0025] Figure 7 This is a schematic diagram of the top structure of the inner wall of the spray box of this utility model.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Spraying assembly; 101. Spray box; 102. Spray plate; 103. Spray nozzle; 104. Branch pipe; 105. Transport main pipe; 2. Transport assembly; 201. Mounting plate; 202. Mounting cavity; 203. Connecting groove; 204. Drive roller; 205. H-type conveyor belt; 206. Drive motor; 3. Suspension assembly; 301. Connecting disc; 302. Suspension pipe; 303. Suspension hook; 4. Elastic extrusion assembly; 401. Limiting rod; 402. Extrusion groove; 403. Extrusion block; 404. Extrusion disc; 405. Masking pipe; 406. Extrusion rod; 407. Pull spring; 5. Pressing assembly; 501. Guide frame; 502. Ball bearing; 6. Rotary drive assembly; 601. Gear; 602. Tooth plate. Detailed Implementation

[0028] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0029] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0030] Please see Figures 1-7 As shown, this utility model is a uniform spraying device for a carbide coating on a circular saw blade, including a spraying component 1 and a transport component 2. The transport component 2 passes through the spraying component 1. A plurality of suspension components 3 are provided at the transport end of the transport component 2. An elastic extrusion component 4 is provided on the surface of the suspension component 3. A pressing component 5 is provided inside the spraying component 1. A rotation drive component 6 is provided on the surface of the suspension component 3 and inside the spraying component 1.

[0031] When the transport component 2 drives the circular saw blade through the interior of the spraying component 1 via the suspension component 3, the pressing component 5 presses the elastic extrusion component 4 so that the elastic extrusion component 4 limits the circular saw blade on the suspension component 3, while the rotation drive component 6 drives the suspension component 3 to rotate.

[0032] By suspending the circular saw blade on the suspension end of the suspension assembly 3, the transport assembly 2 can transport the circular saw blade to the interior of the spraying assembly 1 through the suspension assembly 3; after the suspension assembly 3 moves into the interior of the spraying assembly 1, the pressing assembly 5 can press down on the pressing end of the elastic pressing assembly 4, thereby limiting and fixing the circular saw blade with the elastic pressing assembly 4. At the same time, the rotation drive assembly 6 can drive the moving suspension assembly 3, thereby allowing the suspension assembly 3 to rotate and move.

[0033] After the suspension assembly 3 is fed into the spraying assembly 1 via the transport assembly 2, the pressing assembly 5 presses down on the elastic compression assembly 4. At this time, the suspension assembly 3 and the elastic compression assembly 4 work together to stably limit the circular saw blade. Simultaneously, the rotation drive assembly 6 drives the suspension assembly 3 to rotate the circular saw blade. The above configuration enables the circular saw blade to rotate stably while moving and receiving spraying within the spraying assembly 1. This not only effectively prevents the coating from being too thick, too thin, or missed, but also ensures the appearance quality, performance, and service life of the circular saw blade.

[0034] In one embodiment, the spraying assembly 1 includes a spraying box 101, with a plurality of spraying plates 102 fixedly installed on both sides of the inner wall of the spraying box 101, a plurality of spray nozzles 103 fixedly connected to the inner side of the spraying plates 102, and branch pipes 104 fixedly connected to the outer side of the spraying plates 102. A transport main pipe 105 is provided on the top of the spraying box 101, and the branch pipes 104 are fixedly connected to the transport main pipe 105.

[0035] When the circular saw blade is coated, the external storage device transports metal powder to the interior of each coating plate 102 through the transport main pipe 105 and branch pipes 104. At the same time, the metal powder inside each coating plate 102 is transported to the nozzle 103. When the metal powder passes through the nozzle 103, it can be heated instantly and form a high-speed particle stream. These high-speed molten / semi-molten particles impact the saw blade surface with great kinetic energy, causing violent plastic deformation, rapid cooling and solidification, and stacking and interlocking with each other to form a dense coating with high hardness, high wear resistance and high bonding strength on the substrate.

[0036] In one embodiment, the transport component 2 includes a mounting plate 201, which is fixedly mounted on one side of the spray box 101. The mounting plate 201 has a mounting cavity 202 inside, and a connecting groove 203 is provided on the inner wall of the mounting cavity 202. A plurality of drive rollers 204 are rotatably connected inside the mounting cavity 202. An H-shaped conveyor belt 205 is provided on the outer surface of the drive rollers 204. A drive motor 206 is fixedly mounted on the top of the mounting plate 201, and the output end of the drive motor 206 is fixedly connected to the drive rollers 204.

[0037] The drive roller 204 is driven by the drive motor 206, which can drive the H-shaped conveyor belt 205 to move inside the mounting cavity 202. At the same time, the moving H-shaped conveyor belt 205 drives the suspension assembly 3 to move through the connecting groove 203, so that the suspension assembly 3 can transport the circular saw blade into the spray box 101. The drive roller 204 is provided on both the upper and lower sides of the H-shaped conveyor belt 205. This arrangement makes the overall stability of the H-shaped conveyor belt 205 high when it drives the circular saw blade to move.

[0038] In one embodiment, the suspension assembly 3 includes a connecting disc 301, which is fixedly connected to the H-shaped conveyor belt 205 via a connecting groove 203. Several connecting discs 301 are provided on the outer surface of the H-shaped conveyor belt 205. A suspension tube 302 is rotatably connected inside the connecting disc 301, and several suspension hooks 303 are fixedly connected to the outer surface of the suspension tube 302.

[0039] By directly hanging the inner hole of the circular saw blade onto the suspension hook 303, the suspension tube 302 supports the circular saw blade through the suspension hook 303. When the H-shaped conveyor belt 205 moves, it can drive the connecting plate 301 to move inside the connecting groove 203. The moving connecting plate 301 drives the circular saw blade to move through the suspension tube 302 and the suspension hook 303. The mounting plate 201 can support the connecting plate 301 through the connecting groove 203, thereby further improving the overall support effect of the suspension tube 302 on the connecting plate 301.

[0040] In one embodiment, the elastic extrusion assembly 4 includes a limiting rod 401 located below the suspension hook 303. An extrusion groove 402 is formed on the outer surface of the suspension tube 302 corresponding to the limiting rod 401. An extrusion block 403 is movably connected inside the extrusion groove 402. One end of the extrusion block 403 is fixedly connected to an extrusion disc 404, which is fixedly connected to the suspension tube 302. The other end of the extrusion block 403 is fixedly connected to a shielding tube 405, which is sleeved on the outer surface of the suspension tube 302. The limiting rod 401 is fixedly connected to the shielding tube 405. An extrusion rod 406 is provided at the top of the connecting disc 301, extending into the interior of the suspension tube 302 and fixedly connected to all the extrusion discs 404. A tension spring 407 is fixedly connected between the top of the inner wall of the suspension tube 302 and the uppermost extrusion disc 404.

[0041] When the inner hole of the circular saw blade is suspended on the hook 303, the limiting rod 401 is also inside the inner hole. When the suspension tube 302 moves into the spray box 101, the extrusion rod 406 receives external pressure and moves downward. At this time, the moving extrusion rod 406 can simultaneously press down on all the extrusion discs 404, so that the extrusion discs 404 can drive the limiting rod 401 downward through the corresponding extrusion block 403, extrusion groove 402 and shielding tube 405, and allow the hook 303 and the limiting rod 401 to pass through the circular saw blade. The inner hole limits its movement; when the external pressure disappears, the pull spring 407 can pull the extrusion rod 406 upward, so that the limiting rod 401 can move upward automatically, and at the same time the limiting rod 401 no longer extrudes downward on the circular saw blade. This setting makes it more convenient to pick up and put down the circular saw blade on the suspension hook 303; when the limiting rod 401 moves, the blocking tube 405 can always block the extrusion groove 402, so that the external coating material will not accumulate inside the suspension tube 302 through the extrusion groove 402.

[0042] In one embodiment, the pressing assembly 5 includes a pressing guide frame 501, which is fixedly installed on the top of the inner wall of the spray box 101, and a ball bearing 502 is rotatably connected to the top of the extrusion rod 406.

[0043] The guide frame 501 consists of an inclined section and a horizontal section. When the suspension tube 302 moves into the spray box 101, the extrusion rod 406 can move into the inclined section of the guide frame 501. At the same time, the ball bearing 502 contacts the top of the inner wall of the guide frame 501. As the suspension tube 302 moves continuously, the inclined section can continuously press the extrusion rod 406 downward through the ball bearing 502. When the suspension tube 302 moves into the horizontal section, it means that the limiting rod 401 has completed the limiting of the circular saw blade under the extrusion of the extrusion rod 406. When the suspension tube 302 moves out of the spray box 101, the extrusion rod 406 also moves out of the guide frame 501. At this time, the guide frame 501 no longer extrudes the extrusion rod 406, and the extrusion rod 406 automatically resets under the pull of the pull spring 407. The ball bearing 502 in the above setting makes the friction between the extrusion rod 406 and the guide frame 501 smaller.

[0044] In one embodiment, the rotary drive assembly 6 includes a gear 601, which is fixedly connected to the outer surface of the suspension tube 302, and a toothed plate 602 is fixedly connected to the top of the inner wall of the spray box 101 corresponding to the gear 601.

[0045] When the suspension pipe 302 moves into the spray box 101, the gear 601 meshes with the toothed plate 602. At this time, as the suspension pipe 302 moves continuously, the toothed plate 602 can drive the gear 601 to rotate. The rotating gear 601 then drives the circular saw blade to rotate inside the spray box 101 through the suspension pipe 302, so that the paint can be more evenly distributed on the surface of the circular saw blade.

[0046] Through the above technical solution, 1. After the suspension component 3 is sent into the spraying component 1 by the transport component 2, the pressing component 5 presses down the elastic extrusion component 4. At this time, the suspension component 3 and the elastic extrusion component 4 work together to stably limit the circular saw blade; at the same time, the rotation drive component 6 drives the suspension component 3 to rotate the circular saw blade. The above settings enable the circular saw blade to rotate stably when moving and receiving spraying in the spraying component 1; this not only effectively prevents the coating from being too thick, too thin, or missed, but also ensures the appearance quality, performance, and service life of the circular saw blade.

[0047] 2. When the circular saw blade is hung on the suspension hook 303, the limiting rod 401 is also inside the inner hole. When the suspension tube 302 moves into the spray box 101, the extrusion rod 406 presses down on the extrusion plate 404 under the guidance of the guide frame 501. At this time, the extrusion plate 404 drives the limiting rod 401 to move downward through the extrusion block 403, the extrusion groove 402 and the shielding tube 405, so that the suspension hook 303 and the limiting rod 401 can limit the circular saw blade through the inner hole. When the extrusion rod 406 moves out from inside the guide frame 501, the pull spring 407 pulls the extrusion rod 406 upward, and the limiting rod 401 no longer presses down on the circular saw blade. The above settings make it less likely for the circular saw blade to shake when spraying, and it is also more convenient to pick up and put down the circular saw blade on the suspension hook 303.

[0048] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," 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 the utility model. 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.

[0049] The preferred embodiments of the utility model disclosed above are merely illustrative of the utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize it. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A device for uniformly spraying a carbide coating onto a circular saw blade, comprising a spraying assembly (1) and a transport assembly (2), characterized in that, The transport component (2) penetrates the spraying component (1). The transport end of the transport component (2) is provided with a plurality of suspension components (3). The surface of the suspension component (3) is provided with an elastic extrusion component (4). The interior of the spraying component (1) is provided with a pressing component (5). The surface of the suspension component (3) and the interior of the spraying component (1) are provided with a rotation drive component (6). When the transport component (2) drives the circular saw blade through the interior of the spraying component (1) via the suspension component (3), the pressing component (5) presses the elastic extrusion component (4) so ​​that the elastic extrusion component (4) limits the circular saw blade on the suspension component (3), while the rotation drive component (6) drives the suspension component (3) to rotate.

2. The uniform spraying device for a carbide coating on a circular saw blade according to claim 1, characterized in that, The spraying assembly (1) includes a spraying box (101), on which several spraying plates (102) are fixedly installed on both sides of the inner wall of the spraying box (101). Several nozzles (103) are fixedly connected to the inner side of the spraying plate (102), and a branch pipe (104) is fixedly connected to the outer side of the spraying plate (102). A transport main pipe (105) is provided on the top of the spraying box (101), and the branch pipe (104) is fixedly connected to the transport main pipe (105).

3. The uniform spraying device for a carbide coating on a circular saw blade according to claim 2, characterized in that, The transport assembly (2) includes a mounting plate (201), which is fixedly installed on one side of the spray box (101). The mounting plate (201) has an installation cavity (202) inside, and a connecting groove (203) is provided on the inner wall of the installation cavity (202). Several drive rollers (204) are rotatably connected inside the installation cavity (202). An H-shaped conveyor belt (205) is provided on the outer surface of the drive rollers (204). A drive motor (206) is fixedly installed on the top of the mounting plate (201), and the output end of the drive motor (206) is fixedly connected to the drive rollers (204).

4. The uniform spraying device for a carbide coating on a circular saw blade according to claim 3, characterized in that, The suspension assembly (3) includes a connecting plate (301), which is fixedly connected to the H-shaped conveyor belt (205) through a connecting groove (203). The connecting plate (301) has several connections on the outer surface of the H-shaped conveyor belt (205). The connecting plate (301) is rotatably connected to a suspension tube (302), and the outer surface of the suspension tube (302) is fixedly connected to several suspension hooks (303).

5. A uniform coating device for carbide coating on a circular saw blade according to claim 4, characterized in that, The elastic compression assembly (4) includes a limiting rod (401), which is located on the lower side of the suspension hook (303). An compression groove (402) is formed on the outer surface of the suspension tube (302) corresponding to the limiting rod (401). A compression block (403) is movably connected inside the compression groove (402). One end of the compression block (403) is fixedly connected to a compression disc (404), which is fixedly connected to the suspension tube (302). The other end of the compression block (403)... A shielding tube (405) is fixedly connected to the outer surface of the suspension tube (302). The shielding tube (405) is sleeved on the outer surface of the suspension tube (302). The limiting rod (401) is fixedly connected to the shielding tube (405). A pressing rod (406) is provided on the top of the connecting plate (301). The pressing rod (406) extends into the interior of the suspension tube (302) and is fixedly connected to all the pressing plates (404). A pulling spring (407) is fixedly connected between the top of the inner wall of the suspension tube (302) and the uppermost pressing plate (404).

6. The uniform spraying device for a carbide coating on a circular saw blade according to claim 5, characterized in that, The pressing assembly (5) includes a pressing guide frame (501), which is fixedly installed on the top of the inner wall of the spray box (101), and the top of the extrusion rod (406) is rotatably connected to a ball bearing (502).

7. A uniform coating device for carbide coating on a circular saw blade according to claim 4, characterized in that, The rotary drive assembly (6) includes a gear (601), which is fixedly connected to the outer surface of the suspension tube (302), and a toothed plate (602) is fixedly connected to the top of the inner wall of the spray box (101) corresponding to the gear (601).