Surface wiping device and method

Abstract

The present invention discloses a surface wiping device and method, wherein the wiping component of the device is lifted and lowered and horizontally displaced relative to a workpiece carrier; a dust-free cloth is wound on a material unwinding roll of the wiping component; a material rewinding roll recycles the dust-free cloth released by the material unwinding roll; the dust-free cloth between the material unwinding roll and the material rewinding roll passes through a first perforation on a first clamping plate and a second perforation on a second clamping plate in sequence; a tensioning device tensions and relaxes the dust-free cloth between the first perforation and the second perforation; a pressure head assembly includes a plurality of pressure heads arranged at intervals in the transverse direction, each pressure head can press on the top surface of the dust-free cloth between the first perforation and the second perforation, and each pressure head can also rotate horizontally to twist the dust-free cloth pressed by it by rotation; and the method wipes the workpiece through the device. The present invention can realize automatic wiping of the plane position of the workpiece, and can also realize automatic wiping of the uneven position of the workpiece.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic cleaning devices, and in particular to a surface wiping device and method. Background Art

[0002] Some workpieces, such as magnet assemblies, need to be wiped and cleaned during the production process. Currently, there are automatic wiping devices on the market. The pressure head presses the dust-free cloth down, pressing the dust-free cloth onto the surface of the workpiece, and then the device drives the dust-free cloth to move to achieve the wiping of the workpiece surface. However, this method is only applicable to the case where the surface to be wiped of the workpiece is flat. If the surface to be wiped of the workpiece is uneven, or there are holes or grooves, it is difficult to achieve effective wiping and cleaning, resulting in poor versatility of the equipment.

[0003] Therefore, there is a need for a technical solution that can efficiently wipe the flat surface of a workpiece and can also effectively wipe the uneven surface of the workpiece. Summary of the invention

[0004] The purpose of the present invention is to provide a surface wiping device and method, and the technical problem to be solved is how to realize automatic wiping of both the planar position of the workpiece and the uneven position of the workpiece.

[0005] To achieve the above-mentioned purpose, the solution of the present invention is: a surface wiping device, including a workpiece carrier, a displacement drive component and a wiping component;

[0006] The top surface of the workpiece carrier is used to place the workpiece;

[0007] The displacement drive component is used to drive the wiping component to move up and down and horizontally relative to the workpiece carrier;

[0008] The wiping assembly includes a material unwinding roll, a material receiving roll, a first clamping plate, a second clamping plate, a tensioning device and a pressure head assembly;

[0009] The unwinding roll is wound with a dust-free cloth and is used to release the dust-free cloth through rotation;

[0010] The receiving reel is used to recycle the dust-free cloth released from the unwinding reel by rotating;

[0011] The first clamping plate is penetrated by a first through hole, and the second clamping plate is penetrated by a second through hole. The cross-sectional shapes of the first through hole and the second through hole match the cross-sectional shape of the dust-free cloth. The dust-free cloth between the unwinding roll and the receiving roll passes through the first through hole and the second through hole in sequence.

[0012] The tensioning device is used to tension and relax the dust-free cloth between the first perforation and the second perforation, so that when tensioning, the dust-free cloth is flattened and stretched between the first perforation and the second perforation, and when relaxing, the dust-free cloth is relaxed between the first perforation and the second perforation;

[0013] The pressure head assembly is arranged above the dust-free cloth between the first perforation and the second perforation, and includes a plurality of pressure heads arranged laterally at intervals. Each pressure head can press on the top surface of the dust-free cloth between the first perforation and the second perforation. Each pressure head can also rotate horizontally to twist the dust-free cloth pressed by it through rotation.

[0014] Furthermore, the pressure heads are arranged in a row transversely.

[0015] Furthermore, the pressure head assembly is provided with a pressure head driving motor, a driving gear, a rack and a driven gear;

[0016] The driving gear is fixed on the rotating shaft of the pressure head driving motor;

[0017] The rack is arranged to slide linearly along its length direction and meshes with the driving gear so as to slide back and forth linearly under the drive of the positive and negative rotation of the driving gear;

[0018] The arrangement direction of each pressure head is consistent with the extension direction of the rack and is located beside the rack. A driven gear is fixed on each pressure head, and each driven gear is engaged with the rack respectively to reciprocate forward and reverse under the drive of the reciprocating linear sliding of the rack.

[0019] Furthermore, each of the pressure heads is elastically retractable in the longitudinal direction so as to be able to elastically press down on the top surface of the dust-free cloth.

[0020] Furthermore, the tensioning device includes a sliding block, which is located between the dust-free cloth unwinding roll and the first clamping plate, so as to abut against the dust-free cloth to flatten and tighten the dust-free cloth between the first perforation and the second perforation, or to move away from the dust-free cloth to loosen the dust-free cloth between the first perforation and the second perforation.

[0021] Furthermore, an alcohol spraying mechanism is provided, which is fixedly arranged on the workpiece carrier and is used for spraying alcohol onto the bottom surface of the dust-free cloth between the first perforation and the second perforation.

[0022] Furthermore, it also includes a base frame, and the displacement drive assembly includes a left-right displacement linear drive mechanism, a lifting drive mechanism and a carrier displacement drive mechanism. A door frame is fixedly arranged above the base frame, the left-right displacement linear drive mechanism is arranged on the door frame, the lifting drive mechanism is installed on the left-right displacement linear drive mechanism, and is displaced left-right by the left-right displacement linear drive mechanism. The wiping assembly is installed on the lifting drive mechanism, and is lifted and lowered by the lifting drive mechanism. The carrier displacement drive mechanism is arranged between the workpiece carrier and the base frame, and is used to drive the workpiece carrier to slide back and forth.

[0023] A surface wiping method, using the surface wiping device as described above, comprises the following steps:

[0024] S1. Place the workpiece on the workpiece carrier so that the surface to be cleaned faces upward;

[0025] S2, causing the tensioning device to tension the dust-free cloth between the first perforation and the second perforation, so that each pressure head presses on the top surface of the dust-free cloth between the first perforation and the second perforation;

[0026] S3, the displacement driving component drives the wiping component to descend, so that the bottom surface of the dust-free cloth between the first perforation and the second perforation is pressed against the surface to be cleaned of the workpiece, and then the displacement driving component drives the wiping component to move back and forth horizontally as a whole, so as to wipe the surface to be cleaned of the workpiece through the dust-free cloth between the first perforation and the second perforation.

[0027] Furthermore, step S4 is included, in which the tensioning device loosens the dust-free cloth between the first perforation and the second perforation, relaxes the dust-free cloth between the first perforation and the second perforation, rotates each pressure head horizontally, and wipes the surface to be cleaned of the workpiece by twisting the dust-free cloth.

[0028] A surface wiping method, using the surface wiping device as described above, comprises the following steps:

[0029] S10, placing the workpiece on the workpiece carrier, with the position of the workpiece to be cleaned facing upward;

[0030] S20, causing the tensioning device to loosen the dust-free cloth between the first perforation and the second perforation, so that the dust-free cloth is relaxed between the first perforation and the second perforation;

[0031] S30, the displacement driving component drives the wiping component to move to the position to be cleaned of the workpiece, so that each pressing head is directly above the position to be cleaned, and the dust-free cloth is pressed on the position to be cleaned of the workpiece;

[0032] S40, rotating each pressing head horizontally, and wiping the position to be cleaned of the workpiece by twisting the dust-free cloth.

[0033] After adopting the above scheme, the beneficial effect of the present invention is that: the dust-free cloth between the first perforation and the second perforation is tensioned by the tensioning device, so that the dust-free cloth is flattened and stretched between the first perforation and the second perforation, and the top surface of the dust-free cloth between the first perforation and the second perforation is pressed by each pressure head, and the wiping component is driven to move by the displacement driving component, so that the bottom surface of the dust-free cloth between the first perforation and the second perforation is pressed on the flat surface of the workpiece to be cleaned, and then the displacement driving component drives the wiping component to move back and forth, so that the flat surface of the workpiece can be cleaned. Cleaning; loosen the dust-free cloth between the first perforation and the second perforation through the tensioning device, so that the dust-free cloth is relaxed between the first perforation and the second perforation, at which time the dust-free cloth between the first perforation and the second perforation can be bent and wrinkled, and the top surface of the dust-free cloth between the first perforation and the second perforation is pressed by each pressure head to press the dust-free cloth on the position to be cleaned of the workpiece, at which time the dust-free cloth can be bent and extended into the recessed position of the workpiece, and then the pressure heads are rotated to twist the dust-free cloth, so that the dust-free cloth is partially wrinkled, thereby achieving cleaning on the uneven surface of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0035] Figure 2 It is a front view structural schematic diagram of the present invention;

[0036] Figure 3 is a schematic diagram of the three-dimensional structure of the wiping component;

[0037] Figure 4 is a partial cross-sectional schematic diagram of a wiping component;

[0038] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0039] Figure 6 is a front cross-sectional view of the wiping assembly;

[0040] Figure 7 for Figure 6 A partial enlarged view of point B in the middle;

[0041] Figure 8 for Figure 6 A partial enlarged view of point C in the middle;

[0042] Fig. 9 for Figure 6 A partial enlarged view of point D in the middle;

[0043] Fig.10 Schematic diagram of twisting the dust-free cloth for the pressure head.

[0044] Explanation of numbers: 1-workpiece carrier, 2-displacement drive assembly, 3-wiping assembly, 4-workpiece, 5-unwinding roll, 6-rewinding roll, 7-first clamping plate, 8-second clamping plate, 9-tensioning device, 10-dust-free cloth, 11-first perforation, 12-second perforation, 13-pressing head, 14-pressing head driving motor, 15-driving gear, 16-rack, 17-driven gear, 18-sliding block, 19-alcohol injection mechanism, 20-base, 21-left and right displacement linear drive mechanism, 22-lifting drive mechanism, 23-gantry, 24-carrier displacement drive mechanism, 25-movable part, 26-fixed part, 27-spring, 28-wiping assembly mounting frame, 29-third perforation. DETAILED DESCRIPTION

[0045] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] In the claims, specification and the above-mentioned drawings of the present invention, unless otherwise explicitly defined, directional words, such as the use of terms such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation, so they cannot be understood as limiting the specific protection scope of the present invention.

[0047] The present invention provides a surface wiping device, such as Figure 1-10As shown, it includes a workpiece carrier 1, a displacement drive component 2 and a wiping component 3; the top surface of the workpiece carrier 1 is used to place a workpiece 4, and the workpiece 4 is specifically a magnet in this embodiment; the displacement drive component 2 can be any existing three-axis linear displacement drive mechanism, as long as it can drive the wiping component 3 to rise and fall and horizontally displace relative to the workpiece carrier 1. The preferred scheme adopted in this embodiment is given later; the wiping component 3 includes a discharge roll 5, a receiving roll 6, a first clamping plate 7, a second clamping plate 8, a tensioning device 9 and a pressure head assembly; a dust-free cloth 10 is wound on the discharge roll 5, which is used to release the dust by rotating. The dust-free cloth 10 and the receiving roll 6 are used to recycle the dust-free cloth 10 released by the unwinding roll 5. Of course, the unwinding roll 5 and the receiving roll 6 are respectively connected to the driving motors and rotate under the drive of the corresponding driving motors. This is a well-known technology in the art. The first clamping plate 7 and the second clamping plate 8 are arranged at intervals on the left and right. The first clamping plate 7 is penetrated by the first through hole 11 on the left and right sides, and the second clamping plate 8 is penetrated by the second through hole 12 on the left and right sides. The cross-sectional shape of the first through hole 11 and the second through hole 12 matches the cross-sectional shape of the dust-free cloth 10, and the two are located on the same horizontal straight line. The unwinding roll 5 The dust-free cloth 10 between the first perforation 11 and the second perforation 12 is passed through the first perforation 11 and the second perforation 12 in sequence to guide the dust-free cloth 10, so that the dust-free cloth 10 will not turn over or move in the first perforation 11 and the second perforation 12, and even if the dust-free cloth between the first perforation 11 and the second perforation 12 is twisted, the normal release and reeling of the dust-free cloth 10 can be guaranteed; the tensioning device 9 is used to tighten and relax the dust-free cloth 10 between the first perforation 11 and the second perforation 12, so that when tightening, the dust-free cloth 10 is flattened and tightened between the first perforation 11 and the second perforation 12. When relaxing, the dust-free cloth 10 is relaxed between the first perforation 11 and the second perforation 12. The preferred structure of the tensioning device 9 in this embodiment is given later. Of course, the existing electric tensioning wheel and other structures for controlling the tensioning force can also be adopted without specific limitation. The pressure head assembly is arranged above the dust-free cloth 10 between the first perforation 11 and the second perforation 12, including a plurality of pressure heads 13 arranged at intervals laterally, each pressure head 13 can be pressed on the top surface of the dust-free cloth 10 between the first perforation 11 and the second perforation 12, and each pressure head 13 can also rotate horizontally to twist the dust-free cloth 10 pressed by it through rotation.

[0048] Specifically in this embodiment, the wiping assembly includes a wiping assembly mounting frame 28, the displacement driving assembly 2 drives the wiping assembly mounting frame 28 to move, the unwinding roll 5 and the rewinding roll 6 are installed on the wiping assembly mounting frame 28 at intervals on the left and right, the first clamping plate 7 and the second clamping plate 8 are installed on the wiping assembly mounting frame 28 at intervals on the left and right, and are located below the unwinding roll 5 and the rewinding roll 6, and the first clamping plate 7 and the unwinding roll 5 are on the same side, and the second clamping plate 8 and the rewinding roll 6 are on the same side, and a dust-free cloth guiding structure (guide wheel or guide perforation, etc., not specifically limited, as long as the dust-free cloth can be transported along a predetermined route) is respectively provided between the unwinding roll 5 and the first perforation 11 of the first clamping plate 7, and between the rewinding roll 6 and the second perforation 12 of the second clamping plate 8. ), specifically in the present embodiment, the tensioning device 9 comprises a sliding block 18, which is located between the dust-free cloth unwinding roll 5 and the first clamping plate 7, so as to abut against the dust-free cloth 10, so as to tighten the dust-free cloth between the unwinding roll 5 and the receiving roll 6, so as to flatten and tighten the dust-free cloth 10 between the first perforation 11 and the second perforation 12, or to move away from the dust-free cloth 10, so as to loosen the dust-free cloth 10 between the first perforation 11 and the second perforation 12. The displacement of the sliding block 18 can be electrically or pneumatically driven, and of course can also be manually adjusted, without specific limitation. In order to prevent the loosened dust-free cloth from detaching from the sliding block 18, a third perforation 29 is provided on the sliding block 18, and the third perforation 29 matches the cross-sectional shape of the dust-free cloth 10 for the dust-free cloth 10 to pass through.

[0049] In a preferred embodiment, each of the pressure heads 13 is elastically telescopically arranged in the longitudinal direction so as to be able to elastically press down on the top surface of the dust-free cloth 10, thereby being able to provide a more stable downward pressure to avoid damage to the equipment or workpiece due to excessive downward pressure. It is also possible to perform matching lifting and lowering according to the undulations of the workpiece surface when the workpiece surface is undulating. Specifically, each of the pressure heads 13 includes a fixed part 26, a movable part 25 and a spring 27. The fixed part 26 is horizontally rotatably installed on the wiping assembly mounting frame 28. The movable part 25 is slidably arranged at the bottom end of the fixed part 26 and is circumferentially clamped with the fixed part 26. The spring 27 is arranged between the fixed part 26 and the movable part 25, and elastically presses against the movable part 25.

[0050] In a preferred embodiment, in order to efficiently clean a workpiece with gaps or long grooves, the pressure heads 13 are arranged in a row transversely. In order to make the structure of driving the pressure head 13 to rotate more concise, the pressure head assembly is provided with a pressure head driving motor 14, a driving gear 15, a rack 16 and a driven gear 17; the pressure head driving motor 14 is mounted and fixed on the wiping assembly mounting frame 28, and the driving gear 15 is fixed on the rotating shaft of the pressure head driving motor 14 to rotate under the drive of the pressure head driving motor 14; the rack 16 extends horizontally to the left and right, and is arranged to slide linearly along its length direction, and the rack 16 is meshed with the driving gear 15 to perform reciprocating linear sliding to the left and right under the drive of the positive and negative rotation of the driving gear 15; the arrangement direction of each pressure head 13 is consistent with the extension direction of the rack 16, specifically in this embodiment, it is arranged left and right, located beside the rack 16, each pressure head 13 is fixed with a driven gear 17, more specifically fixed on the fixed part 26 of the pressure head 13, and each driven gear 17 is respectively meshed on the rack 16, so that each pressure head 13 is driven by the reciprocating linear sliding of the rack 16 to perform synchronous reciprocating positive and negative rotation.

[0051] In order to ensure the cleaning effect, an alcohol injection mechanism 19 is preferably also provided. The alcohol injection mechanism 19 is fixedly arranged on the workpiece carrier 1, and can spray alcohol upward, and then cooperate with the displacement drive of the displacement drive component to evenly spray alcohol on various locations on the bottom surface of the dust-free cloth 10 between the first perforation 11 and the second perforation 12.

[0052] Specifically in the present embodiment, a base frame 20 is also included, and the displacement drive assembly 2 includes a left-right displacement linear drive mechanism 21, a lifting drive mechanism 22 and a platform displacement drive mechanism 24. The left-right displacement linear drive mechanism 21, the lifting drive mechanism 22 and the platform displacement drive mechanism 24 can be any existing linear drive mechanism such as a linear motor. A door frame 23 is fixedly arranged above the base frame 20, the left-right displacement linear drive mechanism 21 is arranged on the door frame 23, the lifting drive mechanism 22 is installed on the left-right displacement linear drive mechanism 21, and is displaced left and right under the drive of the left-right displacement linear drive mechanism 21. The wiping assembly 3 is installed on the lifting drive mechanism 22. Specifically in the present embodiment, the wiping assembly 3 is installed on the lifting drive mechanism 22 through the wiping assembly mounting frame 28, and then lifted and lowered under the drive of the lifting drive mechanism 22. The platform displacement drive mechanism 24 is arranged between the workpiece carrier 1 and the base frame 20, and is used to drive the workpiece carrier 1 to slide back and forth.

[0053] When both the front and back sides of the workpiece 4 need to be cleaned, two of the surface wiping devices can be provided, and a turning mechanism can be provided between the two surface wiping devices to turn over the workpiece cleaned by one surface wiping device and place it on the other surface wiping device for cleaning.

[0054] A surface wiping method, using a surface wiping device as described above, includes the following steps: S1, placing a workpiece 4 on a workpiece carrier 1, so that the surface to be cleaned of the workpiece 4 faces upward; S2, making the tensioning device 9 tension the dust-free cloth 10 between the first perforation 11 and the second perforation 12, so that each pressure head 13 presses on the top surface of the dust-free cloth 10 between the first perforation 11 and the second perforation 12; S3, the displacement driving component 2 drives the wiping component 3 to descend, so that the bottom surface of the dust-free cloth 10 between the first perforation 11 and the second perforation 12 is pressed on the surface to be cleaned of the workpiece 4, and then the displacement driving component 2 drives the wiping component 3 to move back and forth horizontally as a whole, so as to pass through the first perforation 11 and the second perforation The dust-free cloth 10 between the first perforation 11 and the second perforation 12 is used to wipe the surface to be cleaned of the workpiece 4; for the workpiece 4 with a fully flat surface to be cleaned, only step S3 can be performed. When there are uneven positions such as depressions on the surface to be cleaned, in order to ensure the cleaning effect, step S4 is preferably also included. In step S4, the tensioning device 9 loosens the dust-free cloth 10 between the first perforation 11 and the second perforation 12, and the dust-free cloth 10 is relaxed between the first perforation 11 and the second perforation 12. The pressure head 13 extends into the depression at the uneven position, so that the dust-free cloth forms a shape matching the uneven position, and each pressure head 13 rotates horizontally. The surface to be cleaned of the workpiece 4 is wiped by twisting the dust-free cloth 10, focusing on Fig.10 As shown, since the dust-free cloth 10 is loose at this time, when the dust-free cloth 10 is twisted, the dust-free cloth 10 will not only twist at the position pressed by the pressure head 13, but also the area around the pressure head and the area between adjacent pressure heads 13 will twist, thereby achieving efficient cleaning.

[0055] A surface wiping method, using a surface wiping device as described above, this method is used when the surface of the workpiece 4 to be cleaned is not completely flat, and specifically includes the following steps: S10, placing the workpiece 4 on the workpiece carrier 1, so that the position to be cleaned of the workpiece 4 faces upward; S20, allowing the tensioning device 9 to loosen the dust-free cloth 10 between the first perforation 11 and the second perforation 12, and loosening the dust-free cloth 10 between the first perforation 11 and the second perforation 12; S30, the displacement driving component 2 drives the wiping component 3 to move to the position to be cleaned of the workpiece 4, so that each pressing head 13 is directly above the position to be cleaned, and the dust-free cloth 10 is pressed on the position to be cleaned of the workpiece 4; S40, causing each pressing head 13 to rotate horizontally, and wipe the position to be cleaned of the workpiece 4 by twisting the dust-free cloth 10.

[0056] The above description is only a preferred embodiment of the present invention and is not a limitation on the design of this case. Any equivalent changes made based on the design key of this case shall fall within the protection scope of this case.

Claims

1. A surface wiping device, characterized in that: It comprises a workpiece carrier (1), a displacement drive component (2) and a wiping component (3); The top surface of the workpiece carrier (1) is used for placing the workpiece (4); The displacement drive component (2) is used to drive the wiping component (3) to move up and down and horizontally relative to the workpiece carrier (1); The wiping assembly (3) comprises a material unwinding roll (5), a material receiving roll (6), a first clamping plate (7), a second clamping plate (8), a tensioning device (9) and a pressure head assembly; A dust-free cloth (10) is wound on the unwinding roll (5) and is used to release the dust-free cloth (10) by rotating; The receiving reel (6) is used to recycle the dust-free cloth (10) released by the unwinding reel (5) by rotating; The first clamping plate (7) is penetrated by a first through hole (11), and the second clamping plate (8) is penetrated by a second through hole (12); the cross-sectional shapes of the first through hole (11) and the second through hole (12) match the cross-sectional shape of the dust-free cloth (10); the dust-free cloth (10) between the unwinding roll (5) and the receiving roll (6) passes through the first through hole (11) and the second through hole (12) in sequence; The tensioning device (9) is used to tension and relax the dust-free cloth (10) between the first perforation (11) and the second perforation (12), so that when tensioning, the dust-free cloth (10) is flattened and stretched between the first perforation (11) and the second perforation (12), and when relaxing, the dust-free cloth (10) is relaxed between the first perforation (11) and the second perforation (12); The pressure head assembly is arranged above the dust-free cloth (10) between the first perforation (11) and the second perforation (12), and comprises a plurality of pressure heads (13) arranged at intervals in the transverse direction, each pressure head (13) being capable of pressing on the top surface of the dust-free cloth (10) between the first perforation (11) and the second perforation (12), and each pressure head (13) being capable of rotating horizontally to twist the dust-free cloth (10) pressed thereby; The dust-free cloth between the first perforation and the second perforation is loosened by the tensioning device, so that the dust-free cloth is relaxed between the first perforation and the second perforation. At this time, the dust-free cloth between the first perforation and the second perforation can be bent and wrinkled. The top surface of the dust-free cloth between the first perforation and the second perforation is pressed by each pressure head to press the dust-free cloth on the position to be cleaned of the workpiece. At this time, the dust-free cloth can be bent and extended into the recessed position of the workpiece. Then, the pressure heads are rotated to twist the dust-free cloth, so that the dust-free cloth is partially wrinkled, thereby achieving cleaning on the uneven surface of the workpiece.

2. A surface wiping device as claimed in claim 1, characterized in that: The pressure heads (13) are arranged in a row transversely.

3. A surface wiping device as claimed in claim 2, characterized in that: The pressure head assembly is provided with a pressure head driving motor (14), a driving gear (15), a rack (16) and a driven gear (17); The driving gear (15) is fixed on the rotating shaft of the pressure head driving motor (14); The rack (16) is arranged to slide linearly along its length direction and meshes with the driving gear (15) so as to slide reciprocatingly under the drive of the positive and negative rotation of the driving gear (15); The arrangement direction of each pressure head (13) is consistent with the extension direction of the rack (16) and is located beside the rack (16). A driven gear (17) is fixed to each pressure head (13). Each driven gear (17) is respectively meshed with the rack (16) so as to reciprocate forward and reverse under the drive of the reciprocating linear sliding of the rack (16).

4. A surface wiping device as claimed in claim 1, characterized in that: Each of the pressing heads (13) is elastically telescopically arranged in the longitudinal direction so as to be able to elastically press down on the top surface of the dust-free cloth (10).

5. A surface wiping device as claimed in claim 1, characterized in that: The tensioning device (9) comprises a sliding block (18), which is located between the dust-free cloth unwinding roll (5) and the first clamping plate (7) so as to abut against the dust-free cloth (10) to flatten and tighten the dust-free cloth (10) between the first perforation (11) and the second perforation (12), or to move away from the dust-free cloth (10) to loosen the dust-free cloth (10) between the first perforation (11) and the second perforation (12).

6. A surface wiping device as claimed in claim 1, characterized in that: An alcohol spraying mechanism (19) is also provided, and the alcohol spraying mechanism (19) is fixedly arranged on the workpiece carrier (1) and is used for spraying alcohol onto the bottom surface of the dust-free cloth (10) between the first perforation (11) and the second perforation (12).

7. A surface wiping device as claimed in claim 1, characterized in that: The invention also comprises a base frame (20); the displacement drive assembly (2) comprises a left-right displacement linear drive mechanism (21), a lifting drive mechanism (22) and a platform displacement drive mechanism (24); a door frame (23) is fixedly arranged above the base frame (20); the left-right displacement linear drive mechanism (21) is arranged on the door frame (23); the lifting drive mechanism (22) is mounted on the left-right displacement linear drive mechanism (21) and is displaced left-right under the drive of the left-right displacement linear drive mechanism (21); the wiping assembly (3) is mounted on the lifting drive mechanism (22) and is lifted and lowered under the drive of the lifting drive mechanism (22); and the platform displacement drive mechanism (24) is arranged between the workpiece platform (1) and the base frame (20) and is used for driving the workpiece platform (1) to slide forward and backward.

8. A surface wiping method, using a surface wiping device as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1, placing a workpiece (4) on a workpiece carrier (1) so that the surface of the workpiece (4) to be cleaned faces upward; S2, causing the tensioning device (9) to tension the dust-free cloth (10) between the first perforation (11) and the second perforation (12), so that each pressure head (13) presses on the top surface of the dust-free cloth (10) between the first perforation (11) and the second perforation (12); S3, the displacement drive component (2) drives the wiping component (3) to descend, so that the bottom surface of the dust-free cloth (10) between the first perforation (11) and the second perforation (12) is pressed against the surface to be cleaned of the workpiece (4), and then the displacement drive component (2) drives the wiping component (3) to move horizontally back and forth as a whole, so as to wipe the surface to be cleaned of the workpiece (4) through the dust-free cloth (10) between the first perforation (11) and the second perforation (12).

9. A surface wiping method as claimed in claim 8, characterized in that: The method further comprises a step S4, in which the tensioning device (9) loosens the dust-free cloth (10) between the first perforation (11) and the second perforation (12), relaxes the dust-free cloth (10) between the first perforation (11) and the second perforation (12), rotates each pressing head (13) horizontally, and wipes the surface to be cleaned of the workpiece (4) by twisting the dust-free cloth (10).

10. A surface wiping method, using a surface wiping device as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S10, placing the workpiece (4) on the workpiece carrier (1) so that the position of the workpiece (4) to be cleaned faces upward; S20, causing the tensioning device (9) to loosen the dust-free cloth (10) between the first perforation (11) and the second perforation (12), thereby loosening the dust-free cloth (10) between the first perforation (11) and the second perforation (12); S30, the displacement drive component (2) drives the wiping component (3) to move to the position to be cleaned of the workpiece (4), so that each pressing head (13) is located directly above the position to be cleaned, and the dust-free cloth (10) is pressed against the position to be cleaned of the workpiece (4); S40, rotating each pressing head (13) horizontally, and wiping the position to be cleaned of the workpiece (4) by twisting the dust-free cloth (10).

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