Salient point screening equipment

Abstract

The utility model provides salient point screening equipment. The salient point screening equipment comprises a guide roller, a scraper assembly and a distance adjusting device, the guide roller is used for winding the composite current collector; the composite current collector is provided with salient points; the scraper assembly and the guide roller are oppositely arranged, and a gap is formed between the scraper assembly and the guide roller and used for allowing a composite current collector to pass through; the distance adjusting device is connected to the scraper assembly and used for driving the scraper assembly to move so as to adjust the gap. The scraper assembly is arranged to be capable of cutting off the composite current collector when the composite current collector passes through the gap and the height of the salient points is larger than that of the gap. When the height of the salient points exceeds the requirement, the composite current collector cannot penetrate through the gap, the composite current collector is cut off by the scraper assembly at the moment, the composite current collector with too high salient points can be avoided by cutting off the part, the subsequent processing of the composite current collector is facilitated, and the performance of the lithium battery is further guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of composite current collector detection, and in particular to a bump screening device. Background Art

[0002] As a substitute for aluminum foil and copper foil of the positive and negative electrodes of lithium batteries, composite current collector materials are widely used in the preparation process of lithium battery products. The composite current collector can improve the energy density of the lithium battery, reduce the weight of the lithium battery, and reduce the risk of fire caused by lithium battery puncture.

[0003] Vacuum evaporation coating is the main production method of composite current collector materials. However, during the coating process, the metal liquid surface is often unstable and the liquid surface boils, causing metal droplets to splash onto the surface of the film material or the roller surface, resulting in defects such as splashing, bumps, and scratches on the coated product, which has an adverse impact on the appearance of the product and the subsequent coating process. When the height of the composite current collector is too high, it will affect the subsequent production of the composite current collector and also affect the performance of the lithium battery.

[0004] In view of this, the present utility model is specifically proposed. Summary of the Utility Model

[0005] This application provides a bump screening device to solve the technical problem that the height of bumps on the existing composite current collector is too high and affects the performance of lithium batteries.

[0006] The first aspect of the present utility model provides a bump screening device, including a guide roller, a scraper assembly, and a distance adjustment device. The scraper assembly is disposed opposite to the guide roller and forms a gap with the guide roller. The gap is used for the composite current collector to pass through, and the composite current collector has bumps; the distance adjustment device is connected to the scraper assembly and is used to drive the scraper assembly to move to adjust the size of the gap; the scraper assembly is configured to cut off the composite current collector when the composite current collector passes through the gap and the height of the bump is greater than the gap.

[0007] In this solution, the guide roller and the scraper assembly form a gap for the composite current collector to pass through. The distance adjustment assembly adjusts the height of the bumps that can pass through the gap by adjusting the distance between the scraper assembly and the guide roller, that is, adjusting the size of the gap. When the height of the bump exceeds the requirement, the composite current collector will not be able to pass through the gap. At this time, the composite current collector will be cut off by the scraper assembly. By truncating this part, the composite current collector with too high bumps can be avoided, which is beneficial to the subsequent processing of the composite current collector and thus ensures the performance of the lithium battery.

[0008] In a further aspect of the present utility model, the distance adjustment device includes a bottom plate, a driving assembly, and a guide rail; the driving assembly and the guide rail are disposed on the bottom plate, and the blade assembly is slidably connected to the guide rail; the driving assembly is located on one side of the blade assembly in a first direction, and is configured to drive the blade assembly to move in the first direction and be able to define the current position of the blade assembly after the blade assembly moves.

[0009] In this solution, the blade assembly being slidably connected to the guide rail can define the movement direction of the blade assembly. The driving assembly is located on one side of the blade assembly in the first direction. By driving the blade assembly, it can move along the direction of the guide rail (i.e., the first direction), so that the blade assembly can approach or move away from the guide roller. Through the distance adjustment assembly, the distance of the entire blade assembly relative to the guide roller can be adjusted, and further, the range for screening the height of the convex points on the composite current collector can be adjusted.

[0010] In a further aspect of the present utility model, the driving assembly includes a control arm, a connecting arm, and a pushing arm; the control arm is movably connected to the bottom plate, and the connecting arm movably connects the pushing arm and the control arm; the pushing arm is arranged facing the blade assembly in the first direction, and when the control arm rotates, it drives the pushing arm to move in the first direction.

[0011] In this solution, the design of the control arm, the connecting arm, and the pushing arm enables the driving assembly to move flexibly in multiple directions and be able to be connected and adjusted to each other, so as to achieve precise adjustment of the blade assembly in the first direction; by rotating the control arm, the pushing arm can be driven to move in the first direction, thereby realizing the adjustment of the position of the blade assembly; the design of the movable connection between the connecting arm and the pushing arm makes the structure of the driving assembly stable and reliable during operation, capable of withstanding the forces and pressures during the working process, ensuring the precise and stable adjustment of the position of the blade assembly. Through this driving structure, a locking effect can be achieved, and when the driving assembly stops moving, the blade assembly can be limited.

[0012] In a further aspect of the present utility model, the driving assembly further includes a limit sleeve, the limit sleeve is arranged on the bottom plate and the extending direction is the same as the moving direction of the blade assembly; the pushing arm can pass through the limit sleeve along the first direction under the rotation action of the control arm to push the blade to move towards the guide roller.

[0013] In this solution, the limit sleeve is arranged on the bottom plate. By the pushing arm passing through the limit sleeve along the first direction under the rotation action of the control arm, the moving range of the pushing arm can be effectively limited, thereby realizing precise control of the position of the blade assembly. This ensures that the movement direction of the blade moving towards the guide roller is accurately controllable. The design of the limit sleeve can limit the movement range of the pushing arm, making its movement in the first direction more stable, reducing the possible swing or deviation during the working process, and improving the movement stability of the blade assembly.

[0014] In a further aspect of the present utility model, an installation groove is formed on the bottom plate. The operating arm is hinged to the bottom wall of the installation groove, and the limiting sleeve is arranged on the bottom wall of the installation groove.

[0015] In this aspect, by providing the installation groove, the operating arm and the limiting sleeve can be arranged on the bottom wall of the installation groove, so that part of the driving assembly can be lower than the top height of the entire bottom plate, reducing the space occupied by the driving assembly.

[0016] In a further aspect of the present utility model, the scraper assembly includes a scraper and a base. The base is slidably connected to the guide rail, and the scraper is installed on the base and has a gap with the guide roller.

[0017] In this aspect, the base is slidably connected to the guide rail. The driving assembly drives the base to move, thereby driving the scraper to move towards or away from the guide roller. A gap is formed between the scraper and the guide roller. When the bumps on the composite current collector exceed the screening value, they will be cut off by the scraper.

[0018] In a further aspect of the present utility model, a stop block is arranged on the base, facing the bottom plate. A limiting stop block cooperating with the stop block is arranged on the bottom plate. When the stop block abuts against the limiting stop block, the scraper contacts the guide roller.

[0019] In this aspect, when the bottom plate is driven by the driving assembly to move, by providing the stop block and the limiting stop block cooperating with it, the movement range of the bottom plate and the scraper located on the bottom plate can be limited, thereby preventing the scraper from directly colliding with the guide roller and causing damage to the scraper or the guide roller.

[0020] In a further aspect of the present utility model, the bump screening device further includes a frame and a horizontal adjustment assembly. The frame is connected to the bottom plate through the horizontal adjustment assembly, and the horizontal adjustment assembly can adjust the distance between at least one end of the bottom plate in the left-right direction and the frame in the up-down direction.

[0021] In this aspect, the horizontal adjustment assembly can adjust the distance between at least one end of the bottom plate in the left-right direction and the frame in the up-down direction. This design allows for precise horizontal adjustment of the bottom plate during equipment installation and commissioning. By controlling the levelness of the bottom plate, the stability and precision of the equipment during operation can be ensured. The frame is connected to the bottom plate through the horizontal adjustment assembly, which enables the equipment to have stronger adaptability in different working environments and scenarios. Regardless of whether the ground is flat, the horizontal adjustment assembly can ensure that the equipment reaches the required horizontal state. Through the horizontal adjustment assembly, the equipment can better control the flatness of the bottom plate during operation, reduce errors caused by unevenness, and improve the accuracy and reliability during the screening process.

[0022] In a further aspect of the present utility model, the horizontal adjustment assembly includes a horizontal adjustment bolt, a locking nut, and a fixing bolt. The horizontal adjustment bolt passes through the bottom plate and abuts against the machine frame. The fixing bolt coaxially passes through the horizontal adjustment bolt and connects to the machine frame. The locking nut is connected to the horizontal adjustment bolt and locks the horizontal adjustment bolt when rotated.

[0023] In a further aspect of the present utility model, the bump screening device further includes a pair of first micrometers and a digital display meter. The pair of first micrometers are arranged at both ends of the squeegee in the left-right direction for detecting the distance between the squeegee and the guide roller. The digital display meter is electrically connected to the first micrometers for displaying the distance.

[0024] In this solution, the clearance distance between the squeegee and the guide roller can be detected by the first micrometer, and the distance can be displayed by electrically connecting the digital display meter to the first micrometer, which is convenient for the operator to adjust the size of the clearance, and then adjust the height range of the bumps on the composite current collector.

[0025] In a further aspect of the present utility model, the bump screening device further includes a pair of second micrometers, and the pair of second micrometers are respectively arranged on both sides of the base for detecting the distance between the bottom plate and the guide roller.

[0026] In this solution, the distance between the base and the guide roller can be detected by the second micrometer, and then the adjustable range of the squeegee assembly on the base can be obtained.

[0027] In a further aspect of the present utility model, the bump screening device further includes a winding and unwinding mechanism for winding the composite current collector to drive the composite current collector to pass through the clearance.

[0028] In summary, the bump screening device provided by the present application has at least the following beneficial effects:

[0029] The guide roller and the squeegee assembly form a clearance for the composite current collector to pass through. The distance adjustment assembly adjusts the distance between the squeegee assembly and the guide roller, that is, adjusts the size of the clearance to adjust the height of the bumps that can pass through the clearance. When the height of the bumps exceeds the requirement, the composite current collector will not be able to pass through the clearance, and at this time, the composite current collector will be cut off by the squeegee assembly. By truncating this part, the composite current collector with too high bumps can be avoided, which is beneficial to the subsequent processing of the composite current collector and thus ensures the performance of the lithium battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 Isometric view of the bump screening device provided by the embodiment of the present application;

[0032] Figure 2 Front view structural schematic diagram of the bump screening device provided by the embodiment of the present application;

[0033] Figure 3 Structural schematic diagram of the scraper assembly and the bottom plate provided by the embodiment of the present application;

[0034] Figure 4 Structural schematic diagram of the scraper assembly provided by the embodiment of the present application;

[0035] Figure 5 Structural schematic diagram of the bottom plate and the horizontal adjustment assembly provided by the embodiment of the present application; and

[0036] Figure 6 Structural schematic diagram of the horizontal adjustment assembly provided by the embodiment of the present application.

[0037] The reference numerals are as follows:

[0038] 10. Distance adjustment device; 110. Bottom plate; 110A. Installation groove; 120. Guide rail; 130. Driving assembly; 131. Limiting sleeve; 132. Pushing arm; 133. Connecting arm; 134. Operating arm;

[0039] 20. Scraper assembly; 210. Base; 220. Scraper;

[0040] 30. Guide roller;

[0041] 40. Frame;

[0042] 50. Horizontal adjustment assembly; 510. Horizontal adjustment bolt; 520. Fixing bolt; 530. Locking nut;

[0043] 610. First micrometer head; 620. Digital display; 630. Second micrometer head;

[0044] 710. Stop block; 720. Limit block;

[0045] 80. Composite current collector. Detailed implementation manners

[0046] In the description of the present application, it should be understood that when terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are used to indicate the orientation or positional relationship, without special instructions, it is understood as the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0047] In addition, when features defined as "first" and "second" are used only for descriptive purposes, they should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Features defined as "first" and "second" may explicitly or implicitly include at least one of the defined features. When the description "a plurality of" is used, it generally means at least two, such as two, three, etc., unless otherwise specifically defined.

[0048] In the present application, unless otherwise clearly specified and limited, when terms such as "install", "connect", "couple", "fix", etc. are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0049] In the description of this specification, when terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" are used, it means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0050] Please refer to Figure 1-2, in the first aspect of the present utility model, a bump screening device is provided, which includes a guiding roller 30, a scraper assembly 20, and a distance adjusting device 10. The scraper assembly 20 is disposed opposite to the guiding roller 30 and forms a gap with the guiding roller 30 for the composite current collector 80 to pass through. The composite current collector 80 has bumps; the distance adjusting device 10 is connected to the scraper assembly 20 and is used to drive the scraper assembly 20 to move to adjust the size of the gap; the scraper assembly 20 is configured to cut off the composite current collector 80 when the composite current collector 80 passes through the gap and the height of the bump is greater than the gap.

[0051] In this solution, a gap is formed between the guiding roller 30 and the scraper assembly 20 for the composite current collector 80 to pass through. The distance adjusting assembly adjusts the distance between the scraper assembly 20 and the guiding roller 30, that is, adjusts the size of the gap to adjust the height of the bumps that can pass through the gap. When the height of the bumps exceeds the requirement, the composite current collector 80 will not be able to pass through the gap. At this time, the composite current collector 80 will be cut off by the scraper assembly 20. By truncating this part, the composite current collector 80 with too high bumps can be avoided, which is beneficial to the subsequent processing of the composite current collector 80 and further guarantees the performance of the lithium battery.

[0052] Please refer to Figures 3-5 , in a further solution of the present utility model, the distance adjusting device 10 includes a bottom plate 110, a driving assembly 130, and a guide rail 120; the driving assembly 130 and the guide rail 120 are disposed on the bottom plate 110, and the scraper assembly 20 is slidably connected to the guide rail 120; the driving assembly 130 is located on one side of the scraper assembly 20 in the first direction and is used to drive the scraper assembly 20 to move in the first direction and be able to define the current position of the scraper assembly 20 after the scraper assembly 20 moves.

[0053] In this solution, the scraper assembly 20 being slidably connected to the guide rail 120 can define the movement direction of the scraper assembly 20. The driving assembly 130 is located on one side of the scraper assembly 20 in the first direction. By driving the scraper assembly 20, it can move along the direction of the guide rail 120 (i.e., the first direction), so that the scraper assembly 20 approaches or moves away from the guiding roller 30. The distance between the entire scraper assembly 20 and the guiding roller 30 can be adjusted through the distance adjusting assembly, and thus the height screening range on the composite current collector 80 can be adjusted.

[0054] In a further solution of the present utility model, the driving assembly 130 includes a control arm 134, a connecting arm 133, and a pushing arm 132; the control arm 134 is movably connected to the bottom plate 110, and the connecting arm 133 movably connects the pushing arm 132 and the control arm 134; the pushing arm 132 is disposed facing the scraper assembly 20 in the first direction, and when the control arm 134 rotates, it drives the pushing arm 132 to move in the first direction.

[0055] In this solution, the manipulator arm 134, the connecting arm 133, and the pushing arm 132 are designed such that the driving assembly 130 can move flexibly in multiple directions and can be connected and adjusted to each other, so as to achieve precise adjustment of the blade assembly 20 in the first direction; by rotating the manipulator arm 134, the pushing arm 132 can be driven to move in the first direction, thereby realizing the adjustment of the position of the blade assembly 20; the movably connected design of the connecting arm 133 and the pushing arm 132 makes the driving assembly 130 have a stable and reliable structure during operation, can withstand the forces and pressures during the working process, ensures the precise and stable position adjustment of the blade assembly 20, and can achieve a locking effect through this driving structure, and can limit the position of the blade assembly 20 when the driving assembly 130 stops moving.

[0056] In a further solution of the present utility model, the driving assembly 130 further includes a limit sleeve 131, the limit sleeve 131 is arranged on the bottom plate 110 and the extending direction is the same as the moving direction of the blade assembly 20; the pushing arm 132 can pass through the limit sleeve 131 along the first direction under the rotation action of the manipulator arm 134 to push the blade 220 to move towards the guide roller 30.

[0057] In this solution, the limit sleeve 131 is arranged on the bottom plate 110. By passing the pushing arm 132 through the limit sleeve 131 along the first direction under the rotation action of the manipulator arm 134, the moving range of the pushing arm 132 can be effectively limited, thereby realizing precise control of the position of the blade assembly 20. This ensures that the moving direction of the blade 220 towards the guide roller 30 is accurately controllable. The design of the limit sleeve 131 can limit the movement range of the pushing arm 132, making its movement in the first direction more stable, reducing the possible swing or deviation during the working process, and improving the movement stability of the blade assembly 20.

[0058] In a further solution of the present utility model, an installation groove 110A is formed on the bottom plate 110, the manipulator arm 134 is hinged to the bottom wall of the installation groove 110A, and the limit sleeve 131 is arranged on the bottom wall of the installation groove 110A.

[0059] In this solution, by providing the installation groove 110A, the manipulator arm 134 and the limit sleeve 131 can be arranged on the bottom wall of the installation groove 110A, so that part of the driving assembly 130 can be lower than the top height of the entire bottom plate 110, reducing the space occupied by the driving assembly 130.

[0060] In a further solution of the present utility model, the blade assembly 20 includes a blade 220 and a base 210, the base 210 is slidably connected to the guide rail 120, and the blade 220 is installed on the base 210 and has a gap with the guide roller 30.

[0061] In this solution, the base 210 is slidably connected to the guide rail 120. The driving assembly 130 drives the base 210 to move, thereby driving the scraper 220 towards or away from the guide roller 30. A gap is formed between the scraper 220 and the guide roller 30. When the bumps on the composite current collector 80 exceed the screening value, they will be cut off by the scraper 220.

[0062] In a further solution of the present utility model, a stop block 710 is provided on the base 210. The stop block 710 faces the bottom plate 110. A limit stop block 720 that cooperates with the stop block 710 is provided on the bottom plate 110. When the stop block 710 abuts against the limit stop block 720, the scraper 220 contacts the guide roller 30.

[0063] In this solution, when the bottom plate 110 is driven by the driving assembly 130 to move, by providing the stop block 710 and the limit stop block 720 that cooperates with it, the movement range of the bottom plate 110 and the scraper 220 located on the bottom plate 110 can be limited, thereby preventing the scraper 220 from directly colliding with the guide roller 30 and causing damage to the scraper 220 or the guide roller 30.

[0064] In a further solution of the present utility model, the bump screening device further includes a frame 40 and a horizontal adjustment assembly 50. The frame 40 is connected to the bottom plate 110 through the horizontal adjustment assembly 50. The horizontal adjustment assembly 50 can adjust the distance between at least one end of the bottom plate 110 in the left-right direction and the frame 40 in the up-down direction.

[0065] In this solution, the horizontal adjustment assembly 50 can adjust the distance between at least one end of the bottom plate 110 in the left-right direction and the frame 40 in the up-down direction. This design allows for precise horizontal adjustment of the bottom plate 110 during equipment installation and debugging. By controlling the levelness of the bottom plate 110, the stability and precision of the equipment during operation can be ensured. The frame 40 is connected to the bottom plate 110 through the horizontal adjustment assembly 50, which enables the equipment to have stronger adaptability in different working environments and scenarios. Regardless of whether the ground is flat, the horizontal adjustment assembly can ensure that the equipment reaches the required horizontal state. Through the horizontal adjustment assembly 50, the equipment can better control the flatness of the bottom plate 110 during operation, reduce errors caused by unevenness, and improve the accuracy and reliability during the screening process.

[0066] Please refer to Figure 6 ., in a further solution of the present utility model, the horizontal adjustment assembly includes a horizontal adjustment bolt 510, a locking nut 530, and a fixing bolt 520. The horizontal adjustment bolt 510 passes through the bottom plate 110 and abuts against the frame 40. The fixing bolt 520 coaxially passes through the horizontal adjustment bolt 510 and connects to the frame 40. The locking nut 530 is connected to the horizontal adjustment bolt 510 and locks the horizontal adjustment bolt 510 when rotated.

[0067] In a further aspect of the present utility model, the bump screening device further includes a pair of first micrometer heads 610 and a digital display 620; the pair of first micrometer heads 610 are arranged at both ends of the squeegee 220 in the left-right direction for detecting the distance between the squeegee 220 and the guide roller 30; the digital display 620 is electrically connected to the first micrometer heads 610 for displaying the distance.

[0068] In this aspect, the clearance distance between the squeegee 220 and the guide roller 30 can be detected by the first micrometer heads 610, and the distance can be displayed by electrically connecting the digital display 620 to the first micrometer heads 610, which is convenient for the operator to adjust the size of the clearance, and further adjust the height range of the bumps on the composite current collector 80.

[0069] In a further aspect of the present utility model, the bump screening device further includes a pair of second micrometer heads 630, and the pair of second micrometer heads 630 are respectively arranged on both sides of the base 210 for detecting the distance between the bottom plate 110 and the guide roller 30.

[0070] In this aspect, the distance between the base 210 and the guide roller 30 can be detected by the second micrometer heads 630, and thus the adjustable range of the squeegee assembly 20 on the base 210 can be obtained.

[0071] In a further aspect of the present utility model, the bump screening device further includes a rewinding and unwinding mechanism for winding the composite current collector 80 to drive the composite current collector 80 through the clearance. The rewinding and unwinding mechanism includes a rewinding mechanism for rewinding and driving the movement of the composite current collector 80, and an unwinding mechanism for winding the initial composite current collector 80.

[0072] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A bump screening device, characterized in that: It comprises a guide roller (30), a scraper assembly (20) and a distance adjustment device (10); The scraper assembly (20) is arranged opposite to the guide roller (30) and forms a gap with the guide roller (30), wherein the gap is used for a composite current collector (80) to pass through, and the composite current collector (80) has convex points; The distance adjustment device (10) is connected to the scraper assembly (20) and is used to drive the scraper assembly (20) to move so as to adjust the size of the gap; The scraper assembly (20) is configured to be able to cut off the composite current collector (80) when the composite current collector (80) passes through the gap and the height of the protrusion is greater than the gap.

2. The bump screening device according to claim 1, characterized in that: The distance adjustment device (10) comprises a base plate (110), a drive assembly (130) and a guide rail (120); The driving assembly (130) and the guide rail (120) are arranged on the bottom plate (110), and the scraper assembly (20) is slidably connected to the guide rail (120); The driving assembly (130) is located on one side of the scraper assembly (20) in a first direction, and is used to drive the scraper assembly (20) to move in the first direction and to define the current position of the scraper assembly (20) after the scraper assembly (20) moves.

3. The bump screening device according to claim 2, characterized in that: The driving assembly (130) comprises a manipulating arm (134), a connecting arm (133) and a pushing arm (132); The operating arm (134) is movably connected to the base plate (110), and the connecting arm (133) movably connects the pushing arm (132) and the operating arm (134); The pushing arm (132) is arranged facing the scraper assembly (20) in the first direction, and the operating arm (134) drives the pushing arm (132) to move in the first direction when rotating.

4. The bump screening device according to claim 3, characterized in that: The driving assembly (130) further comprises a limiting sleeve (131), wherein the limiting sleeve (131) is arranged on the bottom plate (110) and has an extension direction that is the same as a moving direction of the scraper assembly (20); The pushing arm (132) can be inserted into the limiting sleeve (131) along the first direction under the rotation action of the operating arm (134) to push the scraper (220) to move toward the guide roller (30).

5. The bump screening device according to any one of claims 2 to 4, characterized in that: The scraper assembly (20) comprises a scraper (220) and a base (210), wherein the base (210) is slidably connected to the guide rail (120), and the scraper (220) is mounted on the base (210) and forms the gap with the guide roller (30).

6. The bump screening device according to claim 5, characterized in that: The base (210) is provided with a stop block (710), the stop block (710) is arranged facing the bottom plate (110), the bottom plate (110) is provided with a limit stop block (720) cooperating with the stop block (710), and when the stop block (710) abuts against the limit stop block (720), the scraper (220) contacts the guide roller (30).

7. The bump screening device according to claim 2, characterized in that: The convex spot screening device also includes a frame (40) and a horizontal adjustment component (50), wherein the frame (40) is connected to the base plate (110) via the horizontal adjustment component, and the horizontal adjustment component is capable of adjusting the distance between at least one end of the base plate (110) in the left-right direction and the frame (40) in the up-down direction.

8. The bump screening device according to claim 7, characterized in that: The horizontal adjustment assembly (50) comprises a horizontal adjustment bolt (510), a locking nut (530) and a fixing bolt (520); the horizontal adjustment bolt (510) is passed through the base plate (110) and abuts against the frame (40); the fixing bolt (520) is coaxially passed through the horizontal adjustment bolt (510) and connected to the frame (40); the locking nut (530) is connected to the horizontal adjustment bolt (510) and locks the horizontal adjustment bolt (510) when rotating.

9. The bump screening device according to claim 5, characterized in that: The convex point screening device also includes a pair of first micrometer heads (610) and a digital display (620); A pair of the first micrometer heads (610) are arranged at both ends of the scraper (220) in the left-right direction, and are used to detect the distance between the scraper (220) and the guide roller (30); The digital display (620) is electrically connected to the first micrometer head (610) for displaying the distance.

10. The bump screening device according to claim 4, characterized in that: The bottom plate is provided with a mounting groove, the operating arm is hinged on the bottom wall of the mounting groove, and the limiting sleeve is arranged on the bottom wall of the mounting groove.

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