A pre-treatment compact brush machine

Abstract

The utility model discloses a kind of pretreatment small-sized roll brush machines, belong to shock-absorbing rubber technical field, including base, fixed support, motor, driving friction wheel, driven friction wheel and transmission belt;The driving friction wheel is connected with the motor transmission, the driven friction wheel is synchronized transmission with the driving friction wheel by the transmission belt, the driving friction wheel and driven friction wheel are arranged on fixed support;The gap of the driving friction wheel and driven friction wheel is provided with the article to be rolled brush.The device faces the auxiliary tool of manual gluing scene, makes skeleton realize automatic, stable rotation in coating process, while giving consideration to adaptability and efficiency, can provide continuous uniform circumferential distribution condition.

Description

Technical Field

[0001] This utility model relates to the field of shock-absorbing rubber technology, and in particular to a pretreatment small roller brush machine. Background Technology

[0002] With the increasing automation in manufacturing, the production scale of vibration-damping rubber products is constantly expanding, and quality requirements are continuously rising. Among these processes, the adhesive coating between the rubber and the frame is a crucial step affecting the reliability of the finished product. Currently, adhesive application is mostly done through spraying or brushing, and automated equipment is widely used in standardized structural products, achieving both efficiency and consistency. However, due to the diverse structural forms and large specifications of vibration-damping rubber products, general-purpose automated spraying equipment cannot cover all structures, and a significant amount of manual adhesive application remains in the production process.

[0003] In purely manual operation mode, the operator typically holds the brush and simultaneously rotates the frame manually to spread the adhesive into a film along the circumference. This method has significant limitations: First, the manual rotation speed is low and fluctuates greatly, and the coating cycle is limited by individual operation, making it difficult to improve overall efficiency; second, insufficient or unstable rotation speed can easily lead to uneven film thickness, increased local accumulation and stringing, and a higher risk of dripping, which adversely affects subsequent drying and bonding stability; third, long-term repetitive actions result in high labor intensity, making it difficult to maintain operational consistency and leading to significant fluctuations in process quality.

[0004] Therefore, how to balance adaptability and efficiency, and provide an auxiliary tooling for manual glue application scenarios, so that the frame can rotate automatically and stably during the coating process to form a continuous and uniform circumferential coating condition, is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] This invention aims to explain at least one of the above-mentioned technical problems.

[0006] In a first aspect, this utility model provides a pretreatment small roller brush machine, including a base, a fixed bracket, a motor, an active friction wheel, a driven friction wheel, and a transmission belt; the active friction wheel is drivenly connected to the motor, and the driven friction wheel is synchronously driven with the active friction wheel through the transmission belt; the active friction wheel and the driven friction wheel are mounted on the fixed bracket; an object to be roller brushed is disposed at the gap between the active friction wheel and the driven friction wheel.

[0007] This invention utilizes a motor to drive an active friction wheel, which in turn drives a driven friction wheel via a transmission belt, creating a synchronous rotation. This forms a stable driving channel between the two friction wheels on a fixed support. The skeleton to be coated is placed between the two friction wheels, and the friction between the outer surface of the friction wheels and the outer wall of the skeleton enables circumferential drive, ensuring continuous and uniform rotation of the skeleton. Because the motor outputs a stable speed, and the active and driven wheels are synchronously linked, the issues of speed fluctuations and uneven rhythm associated with manual rotation are avoided. This ensures the consistency of the linear velocity of the skeleton surface rotation throughout the coating process, allowing the adhesive to receive continuous circumferential spreading power upon contact with the skeleton surface. This promotes rapid and uniform circumferential spreading of the coating, reducing the risks of accumulation, stringing, and dripping, resulting in a consistent coating thickness and a uniform surface. This structure uses mechanical drive to replace manual action, allowing manual operation to only require smooth axial brushing, achieving separation of process actions and stable cycle control, significantly improving coating efficiency and quality stability.

[0008] Furthermore, the outer surfaces of both the active friction wheel and the driven friction wheel are covered with an elastic layer, and the elastic layer is in direct contact with the outer wall of the object to be brushed.

[0009] Furthermore, the transmission belt is a closed-loop flexible belt, and the fixed bracket is provided with a tension adjustment device along a direction perpendicular to the set direction for adjusting the tension of the transmission belt; the tension adjustment device includes a groove and an adjustment roller slidably disposed on the groove; wherein, the set direction is the direction of the center line connecting the active friction wheel and the driven friction wheel.

[0010] Furthermore, the fixed bracket is provided with a quick-clamping structure, through which the active friction wheel and / or the driven friction wheel can be completely disassembled.

[0011] Furthermore, the top of the fixed bracket is provided with a pressure wheel, which can move up and down via a pneumatic or electric mechanism to press the object to be brushed against the active friction wheel and the driven friction wheel to form a three-point clamping structure.

[0012] Furthermore, adhesive return channels are provided on the bases at the bottom of the active friction wheel and the driven friction wheel.

[0013] Furthermore, the adhesive return channel is a recessed structure on the base.

[0014] Furthermore, on a set plane that is parallel to the axes of the active friction wheel, the driven friction wheel, and the object to be brushed, the projections of the active friction wheel, the driven friction wheel, and the object to be brushed are within the projection of the adhesive return channel.

[0015] Furthermore, the pretreatment miniature roller brush machine also includes a spacing adjustment device, which is used to adjust the axial distance between the active friction wheel and the driven friction wheel in the horizontal direction.

[0016] Furthermore, the spacing adjustment device includes a linear guide rail assembly, a movable seat, and a lead screw adjustment mechanism; the linear guide rail assembly is fixed on the fixed bracket and its guiding direction is consistent with the set direction; the movable seat can slide along the linear guide rail assembly; the movable seat is provided with a bearing seat, and the driven friction wheel is rotatably supported by a wheel axle and a rolling bearing disposed in the bearing seat.

[0017] The pretreatment miniature roller brush machine provided by this utility model has the following beneficial effects compared with the prior art: (1) This utility model forms a synchronous rotation channel through an active friction wheel driven by a motor and a driven friction wheel linked by a transmission belt. Combined with the elastic coating layer on the outer surface of the friction wheel and the three-point clamping formed by the top pressure wheel, the skeleton achieves continuous, stable, uniform circumferential motion and maintains reliable positioning during the adhesive coating process. This structure provides the adhesive with a constant linear velocity and controlled spreading conditions, effectively reducing speed fluctuations caused by manual rotation, suppressing coating accumulation, stringing, and dripping, and improving film thickness consistency and surface uniformity, thereby significantly improving film quality and coating efficiency.

[0018] (2) This utility model introduces a structured adjustment and collection scheme in the transmission and clamping dimensions: tension adjustment is achieved by using a closed-loop flexible transmission belt in conjunction with the sliding groove on the fixed bracket to maintain transmission efficiency and speed stability; the driven friction wheel is adjustable along the line connecting the centers of the two wheels through a linear guide rail, a moving seat, and a screw adjustment mechanism, which can adapt to skeletons of different diameters without affecting their free rotation; an adhesive return trough is set under the two wheels to collect spilled adhesive, which facilitates station cleaning and reduces material waste. This enables rapid changeover and long-term stable operation of products with multiple specifications, taking into account both process adaptability and maintenance convenience. Attached Figure Description

[0019] Figure 1 A schematic diagram of the pretreatment miniature roller brush machine provided by this utility model; Figure 2 Side view of the pretreatment miniature roller brush machine provided by this utility model; Figure 3 A front view of the pretreatment miniature roller brush machine equipped with a pressure roller provided by this utility model; Figure 4 A rear sectional view of the pretreatment miniature roller brush machine provided by this utility model.

[0020] 1. Base; 2. Fixed bracket; 3. Motor; 4. Active friction wheel; 5. Driven friction wheel; 6. Transmission belt; 7. Object to be brushed; 8. Elastic layer; 9. Pressure wheel; 10. Adhesive return channel; 11. Slide groove; 12. Adjusting roller; 13. Linear guide rail assembly. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings showing multiple embodiments according to this application. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort will fall within the scope of protection of this application.

[0022] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising," "including," "having," "containing," etc., in the description, claims, and accompanying drawings of this application are open-ended terms. Therefore, "comprising," "including," or "having" refers to, for example, a method or apparatus having one or more steps or elements, but is not limited to having only these one or more elements. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy. Furthermore, 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 one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element 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 this invention.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] like Figure 1-3 As shown in the figure, a pretreatment small roller brush machine according to an embodiment of the present invention includes a base 1, a fixed bracket 2, a motor 3, an active friction wheel 4, a driven friction wheel 5, and a transmission belt 6; the active friction wheel 4 is connected to the motor 3 for transmission, and the driven friction wheel 5 is synchronously transmitted with the active friction wheel 4 through the transmission belt 6; the active friction wheel 4 and the driven friction wheel 5 are disposed on the fixed bracket 2; an object 7 to be roller brushed is disposed in the gap between the active friction wheel 4 and the driven friction wheel 5; the motor 3 is fixed to the base 1 or the fixed bracket 2.

[0026] Preferably, the motor 3 is fixedly mounted on the fixed bracket 2 or the base 1. The active friction wheel 4 is connected to the output end of the motor 3 via a rotating shaft and is driven to rotate by the motor 3. The driven friction wheel 5 is mounted on the fixed bracket 2 via a rotating shaft. The transmission belt 6 is sleeved on the outside of the active friction wheel 4 and the driven friction wheel 5, so that the two form synchronous linkage. The fixed bracket 2 is used to support the active friction wheel 4 and the driven friction wheel 5 and keep their axes parallel. A gap is left between them to accommodate the object to be brushed 7. After the object to be brushed 7 is inserted, it forms frictional contact with the outer circular surfaces of the two friction wheels. When the motor 3 drives the active friction wheel 4 to rotate, the driven friction wheel 5 achieves synchronous rotation under the action of the transmission belt 6, thereby applying a circumferential frictional driving force to the object to be brushed 7, causing the object to be brushed 7 to rotate for the outer peripheral surface coating operation.

[0027] In this embodiment, the motor 3 drives the active friction wheel 4 to generate a stable rotational speed, and the transmission belt 6 synchronously drives the driven friction wheel 5, causing the two friction wheels to rotate synchronously in the circumferential direction. Through the frictional contact force between the wheel surfaces and the outer wall of the object to be brushed 7, the object 7 receives a continuous and stable rotational driving force. With this structural arrangement, the object 7 can maintain a uniform rotational speed during the adhesive application process. The operator only needs to evenly advance the brush along the axial direction of the object to achieve a uniform circumferential distribution of the adhesive on its outer surface. This method avoids speed fluctuations caused by human factors affecting the rotational speed, resulting in a more stable application rhythm, more uniform adhesive film formation, and effectively reducing the risk of adhesive accumulation and dripping, thereby improving application quality and work efficiency.

[0028] Optional, such as Figure 2 As shown, the outer surfaces of both the active friction wheel 4 and the driven friction wheel 5 are covered with an elastic layer 8, and the elastic layer 8 is in direct contact with the outer wall of the object to be brushed 7.

[0029] In this embodiment, the elastic layer 8 covers the outer circumferential surface of the friction wheel, providing a flexible contact interface when driving the object 7 to be rolled and brushed to rotate. Through this elastic layer 8, a high and stable frictional force is formed between the friction wheel and the object 7, ensuring reliable continuous rotation even when there is adhesive on the object surface, changes in surface roughness, or slight dimensional deviations. Because the elastic layer 8 has a certain compressive deformation capacity, it can absorb minor vibrations and buffer local stress peaks during contact, preventing scratches, slippage, or bouncing on the workpiece surface caused by hard contact, thereby further improving rotational stability and surface protection. By setting the elastic layer 8, the rotation of the object during the coating process is smoother, and the film formation consistency is better, making it suitable for skeleton parts with different external surface conditions and different coating conditions.

[0030] Optional, such as Figure 4 As shown, the transmission belt 6 is a closed-loop flexible belt, and the fixed bracket 2 is provided with a tension adjustment device along a direction perpendicular to the set direction for adjusting the tension of the transmission belt 6; the tension adjustment device includes a slide groove 11 and an adjustment roller 12 slidably disposed on the slide groove 11; wherein, the set direction is the direction of the center line connecting the active friction wheel 4 and the driven friction wheel 5.

[0031] In this embodiment, the transmission belt 6 is a flexible closed-loop structure, which is sleeved on the outer periphery of the active friction wheel 4 and the driven friction wheel 5, and the power is synchronously transmitted through the flexible belt body. The fixed bracket 2 is provided with a groove 11 along the line connecting the centers of the two wheels. The operator can adjust the tension of the transmission belt 6 by adjusting the position of the adjusting roller 12 set on the groove 11. Through the above adjustment method, when the transmission belt 6 becomes loose due to long-term operation, or when the tension fluctuates due to temperature changes or wear, the tension of the belt body can be corrected in time to ensure the stability of friction and wrap angle during transmission, thereby maintaining the synchronicity of the two friction wheels and the continuous stability of rotational drive. Through the above structural design, it is beneficial to avoid the problems of slippage, speed fluctuation or transmission efficiency reduction caused by insufficient tension of the transmission belt 6, and improve the overall transmission reliability and long-term operational stability of the equipment.

[0032] Optionally, the fixed bracket 2 is equipped with a quick-clamping structure, through which the active friction wheel 4 and / or driven friction wheel 5 can be completely disassembled. Preferably, the quick-clamping structure is used to limit and quickly release the installation relationship between the friction wheel assembly and the fixed bracket 2. It can be implemented using snap-on fasteners, pressure plate fastening mechanisms, or quick-release fasteners with positioning grooves, allowing the friction wheel assembly to be removed and reinstalled as a whole without disassembling the entire machine or loosening a large number of fasteners. With this structure, when the outer surface of the friction wheel needs replacement, maintenance, or cleaning due to prolonged use, the operator only needs to unlock the quick-clamping structure to completely disassemble the active friction wheel 4 or driven friction wheel 5, simplifying the maintenance process and significantly reducing downtime.

[0033] In this embodiment, the quick-clamping structure, through mechanical limiting and convenient locking, enables the friction wheel assembly to be quickly assembled and disassembled while maintaining positioning accuracy and consistency with the rotation axis. This structure facilitates the replacement of worn parts, adjustment of transmission status, or cleaning of equipment during daily use, avoiding the alignment difficulties and time consumption associated with traditional bolt assembly and disassembly, thereby improving equipment maintenance efficiency and production cycle continuity. Through the above design, this invention can adapt to high-frequency production conditions, reduce maintenance costs, and improve the ease of use and long-term operational reliability of the equipment.

[0034] Optional, such as Figure 3 As shown, the top of the fixed bracket 2 is equipped with a pressure roller 9. The pressure roller 9 can move up and down via a pneumatic or electric mechanism to press the object to be brushed 7 against the active friction wheel 4 and the driven friction wheel 5, forming a three-point clamping structure. The pressure roller 9 is located above the fixed bracket 2 and can move vertically relative to the fixed bracket 2. A downward pressing force is generated by a pneumatic or electric actuator, so that the pressure roller 9 and the two friction wheels below together form a three-point clamping structure. After the object to be brushed 7 is placed between the two friction wheels, the pressure roller 9 presses down and cooperates with the two friction wheels to keep the object to be brushed 7 in a stable and controlled brushing position. The above structure forms a stable contact channel through mechanical clamping, which can effectively limit the jumping and axial displacement of the object to be brushed 7, so that it maintains a fixed posture and rotation center during the glue application process.

[0035] In this embodiment, the clamping roller 9 compensates for the geometric errors and outer diameter tolerances of the object 7 to be rolled by controllable up-and-down movement, and forms a three-point support and enveloping clamp with the two friction rollers below. This restricts the rotation axis of the object 7 to be rolled by the three-point geometric positioning relationship, thereby ensuring that its rotation center is stable and consistent, and avoiding slippage, shaking or swaying caused by center of gravity shift or uneven friction. This three-point clamping, combined with the controllable clamping force of the actuator, enables the object 7 to obtain continuous and controlled rotation conditions during the adhesive application process, improving coating stability, reducing vibration interference, facilitating uniform adhesive film formation, and further ensuring the continuity and consistency of the adhesive application operation.

[0036] Optionally, a glue return groove 10 is provided on the base 1 at the bottom of the active friction wheel 4 and the driven friction wheel 5.

[0037] In this embodiment, the adhesive return channel 10 is located directly below the two friction wheels and the object 7 to be brushed. It utilizes gravity to collect excess adhesive generated during the coating process due to application, splashing, or dripping, preventing the adhesive from remaining and spreading on the base 1 surface and contaminating the work area. By rationally setting the geometric opening and bottom orientation of the return channel 10, the adhesive is guided to converge naturally along the slightly inclined bottom of the channel, reducing secondary contamination of the friction contact area and the resulting fluctuations in the coefficient of friction. This helps maintain the rotational stability and circumferential film uniformity of the object 7 to be brushed, and facilitates rapid cleaning of the base 1 after operation, improving equipment hygiene and maintenance efficiency.

[0038] Optionally, the adhesive return channel 10 is a recessed structure on the base 1.

[0039] In this embodiment, the adhesive return tank 10 adopts a recessed cavity structure relative to the upper surface of the base 1. The tank opening is lower than the surrounding platform to form a receiving space, increasing the bearing capacity for instantaneously dripping adhesive and reducing the risk of spillage. The tank wall and bottom of the recessed structure preferably have a smooth transition and rounded corners to reduce the adhesion and retention of adhesive at the turning point and facilitate scraping. The bottom of the tank can be provided with a slight slope towards one side or the center to guide the adhesive to collect, further improving the convenience of recycling and cleaning, and ensuring the long-term stability of the collection function without changing the overall rigidity of the bearing plane of the base 1.

[0040] Optionally, on a set plane that is parallel to the axes of the active friction wheel 4, the driven friction wheel 5, and the object to be brushed 7, the projections of the active friction wheel 4, the driven friction wheel 5, and the object to be brushed 7 are within the projection of the adhesive return tank 10.

[0041] In this embodiment, by ensuring that the projections of the two friction wheels and the object to be brushed 7 within the designated plane fall entirely into the projection range of the return tank 10, the overlap between the dripping path and the collection area is limited. This ensures that the adhesive falling under gravity during the coating process directly enters the return tank 10 instead of falling into other locations on the base 1. This geometric projection coverage relationship increases the probability of capturing small splashes and edge drips, reduces contamination deposition in non-tank areas, thereby reducing cleaning workload and avoiding the adverse effects of adhesive residue on subsequent rotational friction contact, further ensuring the consistency of the coating operation and the cleanliness of the work site.

[0042] Optionally, the pretreatment miniature roller brush machine further includes a spacing adjustment device, which is used to adjust the axial distance between the active friction wheel 4 and the driven friction wheel 5 in the horizontal direction.

[0043] In this embodiment, the spacing adjustment device is used to controllably fine-tune the center distance between the two friction wheels to adapt to the different outer diameters of the objects 7 to be brushed and the differences in their outer surface conditions, thereby forming a suitable contact line pressure and envelope clamping relationship in the clamping area. By precisely setting the center distance, the friction transmission capability can be stabilized without changing the driving method, reducing the risk of slippage and shaking, and keeping the objects 7 to be brushed rotating at a uniform speed. This helps to improve the continuous circumferential spreading and film formation consistency of the adhesive, while also taking into account the clamping versatility of different batches and different specifications of workpieces.

[0044] Optionally, the spacing adjustment device includes a linear guide rail assembly 13, a movable seat, and a lead screw adjustment mechanism; the linear guide rail assembly 13 is fixed on the fixed bracket 2 and its guiding direction is consistent with the set direction; the movable seat can slide along the linear guide rail assembly 13; the movable seat is provided with a bearing seat, and the driven friction wheel 5 is rotatably supported by a wheel axle and a rolling bearing disposed in the bearing seat.

[0045] In this embodiment, the linear guide assembly 1313 provides a single-degree-of-freedom linear guide for the moving seat, consistent with the set direction, ensuring that the displacement path of the driven friction wheel 5 is parallel to its working axis during adjustment, without introducing additional sway. The lead screw adjustment mechanism converts the rotational operation into a quantifiable and self-locking linear displacement, achieving fine, repeatable adjustment of the axis distance and stable position maintenance. The bearing seat on the moving seat, in conjunction with the rolling bearing, provides low-resistance, coaxiality-controlled rotational support for the driven friction wheel 5, reducing support friction and suppressing radial runout. The above coordination makes the axis distance adjustment both precise and reliable, ensuring that the geometric relationship of the clamping area and the friction drive conditions remain consistent over a long period, thereby stabilizing the cycle time and quality of the coating process.

[0046] It should be noted that, in this embodiment, while adjusting the distance between the active friction wheel and the driven friction wheel through the linear guide assembly 13, it is necessary to simultaneously adjust the adjusting roller 12 in the aforementioned tension adjustment device to adjust the tension of the transmission belt 6 to match the distance between the active friction wheel and the driven friction wheel.

[0047] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from its spirit and scope. Thus, if these modifications and modifications of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and modifications.

Claims

1. A pretreatment small roller brush machine, characterized in that, The device includes a base (1), a fixed bracket (2), a motor (3), an active friction wheel (4), a driven friction wheel (5), and a transmission belt (6); the active friction wheel (4) is connected to the motor (3) for transmission, and the driven friction wheel (5) is synchronously transmitted with the active friction wheel (4) through the transmission belt (6); the active friction wheel (4) and the driven friction wheel (5) are mounted on the fixed bracket (2); an object to be brushed (7) is provided at the gap between the active friction wheel (4) and the driven friction wheel (5); the motor (3) is fixed to the base (1) or the fixed bracket (2).

2. The pretreatment miniature roller brush machine according to claim 1, characterized in that, The outer surfaces of both the active friction wheel (4) and the driven friction wheel (5) are covered with an elastic layer (8), and the elastic layer (8) is in direct contact with the outer wall of the object to be brushed (7).

3. The pretreatment miniature roller brush machine according to claim 1, characterized in that, The fixed bracket (2) is provided with a tension adjustment device along a direction perpendicular to the set direction for adjusting the tension of the transmission belt (6); the tension adjustment device includes a slide groove (11) and an adjustment roller (12) slidably disposed on the slide groove (11); wherein, the set direction is the direction of the center line connecting the active friction wheel (4) and the driven friction wheel (5).

4. The pretreatment miniature roller brush machine according to claim 1, characterized in that, The fixed bracket (2) is provided with a quick clamping structure, and the active friction wheel (4) and / or the driven friction wheel (5) can be disassembled as a whole through the quick clamping structure.

5. The pretreatment miniature roller brush machine according to claim 1, characterized in that, The fixed bracket (2) is provided with a pressure wheel (9) at the top. The pressure wheel (9) can move up and down through a pneumatic or electric mechanism to press the object to be brushed (7) against the active friction wheel (4) and the driven friction wheel (5) to form a three-point clamping structure.

6. The pretreatment miniature roller brush machine according to claim 1, characterized in that, The base (1) at the bottom of the active friction wheel (4) and the driven friction wheel (5) is provided with a glue return groove (10).

7. The pretreatment miniature roller brush machine according to claim 6, characterized in that, The adhesive return channel (10) is a recessed structure on the base (1).

8. The pretreatment miniature roller brush machine according to claim 6, characterized in that, On a set plane that is parallel to the axes of the active friction wheel (4), the driven friction wheel, and the object to be brushed, the projections of the active friction wheel (4), the driven friction wheel, and the object to be brushed are within the projection of the adhesive return tank (10).

9. The pretreatment miniature roller brush machine according to claim 3, characterized in that, The pretreatment miniature roller brush machine also includes a spacing adjustment device, which is used to adjust the axial distance between the active friction wheel (4) and the driven friction wheel (5) in the horizontal direction.

10. The pretreatment miniature roller brush machine according to claim 9, characterized in that, The spacing adjustment device includes a linear guide rail assembly (13), a movable seat, and a lead screw adjustment mechanism; the linear guide rail assembly (13) is fixed on the fixed bracket (2) and its guiding direction is consistent with the set direction; the movable seat can slide along the linear guide rail assembly (13); the movable seat is provided with a bearing seat, and the driven friction wheel (5) is rotatably supported by the wheel axle and the rolling bearing provided in the bearing seat.

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