Polishing device suitable for outer surface of aluminum plate strip

Abstract

The polishing device suitable for the outer surface of the aluminum plate strip comprises a polishing platform, a bearing disc, a bearing plate, a mounting support, a transverse moving structure, a reciprocating structure and a polishing structure, a u-shaped groove is formed in the upper surface of the polishing platform, the bearing disc is arranged in the u-shaped groove, the bearing plate is arranged below the bearing disc, and the mounting support is arranged below the bearing plate. A transverse moving structure is arranged on the upper surface of the mounting support, reciprocating structures are arranged on the two sides of the u-shaped groove in the upper surface of the grinding platform correspondingly, and a grinding structure is arranged above the two reciprocating structures. According to the aluminum plate strip polishing device, by arranging the polishing platform, the bearing disc, the suction cup and the polishing structure, an operator places an aluminum plate strip body on the upper surface of the bearing disc and the upper surface of the suction cup, the aluminum plate strip body is fixed, and the aluminum plate strip body is polished along with rotation of the brush roller when moving along with the translation block; the grinding convenience is effectively improved, the situation that the aluminum plate is pressed by one hand and the angle grinder is held by the other hand is avoided, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding equipment, in particular to a grinding device suitable for the outer surface of an aluminum plate strip. Background Art

[0002] Aluminum strip refers to aluminum sheet or strip made of aluminum as the main raw material and mixed with other alloy elements. For aluminum strip processing, there are certain requirements for the surface flatness and cleanliness of the processed objects. For rough aluminum strips, there will be certain particles and roughness on the surface. In order to meet the processing requirements, it is necessary to use manual methods to grind the surface of aluminum strips with an angle grinder;

[0003] When grinding, the staff needs to hold the angle grinder to press the aluminum strip for grinding, and at the same time move the angle grinder back and forth for grinding. The staff presses the aluminum strip with one hand and holds the angle grinder with the other hand. The inconvenience of operation during grinding greatly affects the work efficiency. At the same time, manual grinding requires constantly moving the angle grinder to grind the surface of the aluminum strip, which is easy to omit during grinding and the grinding quality is poor. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a grinding device suitable for the outer surface of an aluminum plate strip.

[0005] The utility model provides a grinding device suitable for the outer surface of an aluminum plate strip, comprising: a grinding platform, a carrying disc, a carrying plate, a mounting bracket, a transverse movement structure, a reciprocating structure and a grinding structure, wherein a U-shaped groove is provided on the upper surface of the grinding platform, a carrying disc is arranged inside the U-shaped groove, a carrying plate is arranged below the carrying disc, two ends of the carrying plate are fixedly connected to the inner walls on both sides of the U-shaped groove on the upper surface of the grinding platform, a sliding groove is provided on the upper surface of the carrying plate, a mounting bracket is arranged below the carrying plate, upper surfaces of both ends of the mounting bracket are fixedly connected to the lower surface of the grinding platform, a transverse movement structure is arranged on the upper surface of the mounting bracket, the transverse movement structure comprises a first servo motor, a swing plate, a transmission plate and a sliding block, reciprocating structures are respectively arranged on both sides of the U-shaped groove on the upper surface of the grinding platform, the reciprocating structure comprises a guide rail, a translation block, a threaded rod and a second servo motor, a grinding structure is arranged above the two groups of reciprocating structures, and the grinding structure comprises a third servo motor, a first bevel gear, a second bevel gear and a brush roller.

[0006] Preferably, four groups of support columns are provided on the lower surface of the polishing platform, and the upper end of each group of support columns is fixedly connected to the lower surface of the polishing platform. Slide grooves are provided on the inner walls on both sides of the U-shaped groove on the upper surface of the polishing platform. The two sides of the carrying plate are movably arranged inside the slide grooves on both sides of the U-shaped groove. Several groups of suction cups are fixedly connected to the upper surface of the carrying plate, and the aluminum plate strip body is adsorbed on the upper surface of the suction cup.

[0007] Preferably, the lower surface of the first servo motor is fixedly connected to the upper surface of the mounting bracket, the first servo motor power output end is fixedly connected to a swing plate, a transmission plate is provided on the side surface of the swing plate away from the first servo motor, through holes are provided on the side surfaces at both ends of the transmission plate, connecting rods are rotatably connected inside the through holes on the side surfaces at both ends of the transmission plate, one end of the connecting rod inside the through hole on the side surface of one end of the transmission plate is fixedly connected to the side surface of the swing plate away from the first servo motor, a slider is provided on the side surface of the transmission plate away from the swing plate, the slider is slidably arranged inside the slide groove on the upper surface of the carrying plate, one end of the connecting rod inside the through hole on the side surface of the other end of the transmission plate is fixedly connected to the side surface of the slider, and the upper surface of the slider is fixedly connected to the lower surface of the carrying plate.

[0008] Preferably, the lower surface of the guide rail is fixedly connected to the upper surface of the grinding platform, a partition plate is fixedly connected to the inside of one end of the guide rail, a through hole is opened on the side surface of the partition plate, a translation block is arranged on one side of the partition plate, and a second servo motor is arranged on the other side of the partition plate, the bottom of the second servo motor is fixedly connected to the bottom of the guide rail, a threaded hole is opened on the side surface of the translation block, a threaded rod is arranged inside the threaded hole, one end of the threaded rod is rotatably connected to the inner wall of the guide rail, and the other end of the threaded rod passes through the through hole on the side surface of the partition plate and is fixedly connected to the power output end of the second servo motor.

[0009] Preferably, a mounting ear plate is fixedly connected to the upper surface of the translation block, and a through hole is formed on the upper side surface of each set of mounting ear plates.

[0010] Preferably, one side of the third servo motor is fixedly connected to the side surface of the ear plate installed on the upper surface of the translation block in one group of reciprocating structures, and both ends of the brush roller are respectively rotatably arranged inside the through holes on the upper end side surfaces of the ear plates installed on the upper surface of the translation blocks in the two groups of reciprocating structures. The brush roller is attached to the upper surface of the aluminum plate strip body, and the power output end of the third servo motor is fixedly connected to the first bevel gear, and the second bevel gear is meshed with the first bevel gear on one side, and the second bevel gear is fixedly connected to the outer surface of one end of the brush roller.

[0011] Compared with the related art, the grinding device for the outer surface of aluminum strip provided by the utility model has the following beneficial effects:

[0012] By providing a grinding platform, a carrying plate, a suction cup and a grinding structure, an operator places the aluminum strip body on the upper surface of the carrying plate and the upper surface of the suction cup, connects the suction cup to the vacuum pump through a rubber hose, starts the vacuum pump, and the vacuum pump extracts the air inside the suction cup to make the suction cup adsorb the aluminum strip body, thereby completing the fixation of the aluminum strip body, and starts the third servo motor. When the power output end of the third servo motor rotates, it drives the first bevel gear to rotate, and when the first bevel gear rotates, it engages the second bevel gear to rotate, and when the second bevel gear rotates, it drives both ends of the brush roller to rotate inside the through holes on the upper side surfaces of the two groups of mounting ear plates, and when following the movement of the translation block, the aluminum strip body is polished as the brush roller rotates, which effectively increases the convenience during grinding, avoids pressing the aluminum strip with one hand and holding the angle grinder with the other hand, and increases work efficiency.

[0013] By providing a transverse movement structure and a reciprocating structure, an operator starts the first servo motor, and the power output end of the first servo motor rotates to drive the swing plate to rotate. When the movable plate rotates, the transmission plate is pushed to reciprocate. The transmission plate is respectively connected to the swing plate and the slider through the internal connecting rods of the through holes on the side surfaces of the two ends, so that the transmission plate can push the slider to reciprocate and transversely move along the through groove on the upper surface of the bearing plate, thereby driving the bearing plate and the upper aluminum plate strip body to reciprocate and transversely move. At the same time, the second servo motor is started, and the power output end of the second servo motor rotates to drive the threaded rod to rotate inside the through hole on the side surface of the partition plate. When the threaded rod rotates, it is threadedly connected with the threaded hole on the side surface of the translation block, so that the translation block moves along the guide rail, thereby driving the ear plate installed above the translation block to move, and at the same time driving the brush roller to move. After the brush roller moves to the tail end of the aluminum plate strip body, the operator controls the power output end of the second servo motor to reverse to make the brush roller return to its position, and reciprocates in this way. Under the continuous reciprocating transverse movement and reciprocating movement of the brush roller, the aluminum plate strip body is polished more evenly, and the polishing quality is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic structural diagram of a preferred embodiment of a grinding device for the outer surface of an aluminum plate provided by the utility model;

[0015] Figure 2 It is a schematic diagram of the exploded structure of the grinding platform, the bearing disc, the bearing plate, the mounting bracket and the transverse movement structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the exploded structure of the supporting plate, reciprocating structure, grinding structure and aluminum strip body of the utility model;

[0017] Figure 4 For the utility model Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0018] Figure 5 For the utility model Figure 3 Schematic diagram of the enlarged structure at point B in the middle.

[0019] Numbers in the figure: 1. grinding platform; 2. bearing plate; 3. bearing plate; 4. mounting bracket; 5. transverse movement structure; 6. first servo motor; 7. swing plate; 8. transmission plate; 9. slider; 10. reciprocating structure; 11. guide rail; 12. translation block; 13. threaded rod; 14. second servo motor; 15. grinding structure; 16. third servo motor; 17. first bevel gear; 18. second bevel gear; 19. brush roller; 20. support column; 21. suction cup; 22. aluminum plate strip body; 23. connecting rod; 24. partition plate; 25. mounting ear plate. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0021] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in, Figure 1 A schematic structural diagram of a preferred embodiment of a grinding device for the outer surface of an aluminum plate provided by the utility model; Figure 2 It is a schematic diagram of the exploded structure of the grinding platform, the bearing disc, the bearing plate, the mounting bracket and the transverse movement structure of the utility model;

[0022] Figure 3 It is a schematic diagram of the exploded structure of the supporting plate, reciprocating structure, grinding structure and aluminum strip body of the utility model; Figure 4 For the utility model Figure 2 A schematic diagram of the enlarged structure at A in the middle; Figure 5 For the utility model Figure 3The enlarged structural diagram at B in the middle includes: a grinding platform 1, a bearing plate 2, a bearing plate 3, a mounting bracket 4, a transverse movement structure 5, a reciprocating structure 10 and a grinding structure 15. A U-shaped groove is provided on the upper surface of the grinding platform 1, a bearing plate 2 is provided inside the U-shaped groove, a bearing plate 3 is provided below the bearing plate 2, both ends of the bearing plate 3 are fixedly connected to the inner walls of both sides of the U-shaped groove on the upper surface of the grinding platform 1, a sliding groove is provided on the upper surface of the bearing plate 3, a mounting bracket 4 is provided below the bearing plate 3, the upper surfaces of both ends of the mounting bracket 4 are fixedly connected to the lower surface of the grinding platform 1, and a transverse movement structure 5 is provided on the upper surface of the mounting bracket 4, and the transverse movement structure 5 is convenient for driving the bearing plate 2 Reciprocating transverse movement, the transverse movement structure 5 includes a first servo motor 6, a swing plate 7, a transmission plate 8 and a slider 9, and reciprocating structures 10 are respectively arranged on both sides of the U-shaped groove on the upper surface of the grinding platform 1. The reciprocating structure 10 includes a guide rail 11, a translation block 12, a threaded rod 13 and a second servo motor 14. A grinding structure 15 is arranged above the two groups of reciprocating structures 10. The reciprocating structure 10 is convenient for driving the grinding structure 15 to move back and forth. The grinding structure 15 is convenient for grinding the aluminum plate strip body 22. The grinding structure 15 includes a third servo motor 16, a first bevel gear 17, a second bevel gear 18 and a brush roller 19.

[0023] In the specific implementation process, Figure 1 and Figure 2 As shown, four groups of support columns 20 are arranged on the lower surface of the grinding platform 1, and the upper end of each group of support columns 20 is fixedly connected to the lower surface of the grinding platform 1, and the support columns 20 provide supporting force for the grinding platform 1. Slide grooves are opened on the inner walls on both sides of the U-shaped groove on the upper surface of the grinding platform 1, and the two sides of the carrying plate 2 are movably arranged inside the slide grooves on both sides of the U-shaped groove. The slide grooves on the inner walls on both sides of the U-shaped groove on the upper surface of the grinding platform 1 facilitate the reciprocating horizontal movement of the carrying plate 2, and a plurality of groups of suction cups 21 are fixedly connected to the upper surface of the carrying plate 2, and the upper surface of the suction cup 21 adsorbs the aluminum plate strip body 22. The suction cup 21 is connected to the vacuum pump through a rubber hose, and the vacuum pump is started. The vacuum pump extracts the air inside the suction cup 21 so that the suction cup 21 adsorbs the aluminum plate strip body 22.

[0024] Among them, the lower surface of the first servo motor 6 is fixedly connected to the upper surface of the mounting bracket 4, and the mounting bracket 4 is convenient for installing the first servo motor 6. The first servo motor 6 is electrically connected to the external power supply. The power output end of the first servo motor 6 is fixedly connected with a swing plate 7, and a transmission plate 8 is arranged on the side surface of the swing plate 7 away from the end of the first servo motor 6. Through holes are provided on the side surfaces of both ends of the transmission plate 8, and connecting rods 23 are rotatably connected inside the through holes on the side surfaces of both ends of the transmission plate 8. One end of the connecting rod 23 is fixedly connected to the side surface of the swing plate 7 away from the first servo motor 6 inside the through hole on the side surface of one end of the transmission plate 8. A slider 9 is arranged on the side surface of the transmission plate 8 away from the end of the swing plate 7. The slider 9 is slidably arranged inside the slide groove on the upper surface of the carrying plate 3, and one end of the connecting rod 23 is fixedly connected to the side surface of the slider 9 inside the through hole on the side surface of the other end of the transmission plate 8. The connecting rod 23 plays the role of connecting the transmission plate 8 to the swing plate 7 and the slider 9, and at the same time, the two ends of the transmission plate 8 can rotate on the side surface of one end of the swing plate 7 and the side surface of the slider 9, and the upper surface of the slider 9 is fixedly connected to the lower surface of the carrying plate 2.

[0025] The lower surface of the guide rail 11 is fixedly connected to the upper surface of the grinding platform 1, a partition plate 24 is fixedly connected to one end of the guide rail 11, a through hole is provided on the side surface of the partition plate 24, a translation block 12 is provided on one side of the partition plate 24, a second servo motor 14 is provided on the other side of the partition plate 24, the bottom of the second servo motor 14 is fixedly connected to the bottom of the guide rail 11, a threaded hole is provided on the side surface of the translation block 12, a threaded rod 13 is provided inside the threaded hole, one end of the threaded rod 13 is rotatably connected to the inner wall of the guide rail 11, and the other end of the threaded rod 13 passes through the partition plate 24 The through hole on the side surface is fixedly connected to the power output end of the second servo motor 14, and the threaded rod 13 can rotate inside the through hole on the side surface of the partition plate 24. The second servo motor 14 is electrically connected to the external power supply, and the second servo motor 14 is started. The rotation of the power output end of the second servo motor 14 drives the threaded rod 13 to rotate inside the through hole on the side surface of the partition plate 24. When the threaded rod 13 rotates, it is threadedly connected to the threaded hole on the side surface of the translation block 12, so that the translation block 12 moves along the guide rail 11, and at the same time, the power output end of the second servo motor 14 can be controlled to reverse.

[0026] The upper surface of the translation block 12 is fixedly connected with mounting ear plates 25 , and the upper side surface of each group of mounting ear plates 25 is provided with through holes, so that the mounting ear plates 25 can be driven to move when the translation block 12 moves.

[0027] Among them, one side of the third servo motor 16 is fixedly connected to the side surface of the ear plate 25 installed on the upper surface of the translation block 12 in one group of reciprocating structures 10, and the two ends of the brush roller 19 are respectively rotatably arranged inside the through holes on the upper end side surfaces of the ear plates 25 installed on the upper surfaces of the translation blocks 12 in the two groups of reciprocating structures 10. The brush roller 19 is attached to the upper surface of the aluminum plate strip body 22. The power output end of the third servo motor 16 is fixedly connected to the first bevel gear 17, and the first bevel gear 17 is meshed with the second bevel gear 18 on one side. The second bevel gear 18 is fixedly connected to the brush roller 19. The third servo motor 16 is electrically connected to the external power supply on the outer surface of one end of the roller 19, and the third servo motor 16 is started. When the power output end of the third servo motor 16 rotates, it drives the first bevel gear 17 to rotate. When the first bevel gear 17 rotates, it engages with the second bevel gear 18 to rotate. When the second bevel gear 18 rotates, it drives the two ends of the brush roller 19 to rotate inside the through holes on the upper side surfaces of the two groups of mounting ear plates 25, so that the brush roller 19 can grind the aluminum strip body 22, and the brush roller 19 can move with the movement of the mounting plate.

[0028] The working principle provided by the utility model is as follows: the operator first places the aluminum plate strip body 22 on the upper surface of the suction cup 21 on the upper surface of the carrying plate 2, connects the suction cup 21 to the vacuum pump through a rubber hose, and starts the vacuum pump. The vacuum pump extracts the air inside the suction cup 21 so that the suction cup 21 can adsorb the aluminum plate strip body 22. At the same time, the operator starts the first servo motor 6. The rotation of the power output end of the first servo motor 6 drives the swing plate 7 to rotate. When the plate moving plate rotates, it pushes the transmission plate 8 to move back and forth. The transmission plate 8 rotates between the swing plate 7 and the slider 9 through the internal connecting rods 23 of the through holes on the side surfaces of the two ends, respectively, so that the transmission plate 8 can push the slider 9 to move back and forth along the internal through groove on the upper surface of the carrying plate 3, thereby driving the carrying plate 2 and the aluminum plate strip body 22 above to move back and forth. At the same time, the second servo motor 14 is started. The rotation of the power output end of the second servo motor 14 drives the threaded rod 13 to rotate inside the through hole on the side surface of the partition plate 24. The threaded rod 1 When the third servo motor 16 rotates, it is threadedly connected with the threaded hole on the side surface of the translation block 12, so that the translation block 12 moves along the guide rail 11, thereby driving the installation ear plate 25 above the translation block 12 to move, and at the same time driving the brush roller 19 to move. The operator starts the third servo motor 16. When the power output end of the third servo motor 16 rotates, it drives the first bevel gear 17 to rotate. When the first bevel gear 17 rotates, it engages with the second bevel gear 18 to rotate. When the second bevel gear 18 rotates, it drives the two ends of the brush roller 19 to rotate inside the through holes on the upper side surfaces of the two groups of installation ear plates 25. When following the movement of the translation block 12, the aluminum plate strip body 22 is polished with the rotation of the brush roller 19. At the same time, after the brush roller 19 moves to the tail end of the aluminum plate strip body 22, the operator controls the power output end of the second servo motor 14 to reverse to make the brush roller 19 return to its original position. In this way, the aluminum plate strip body 22 is polished more evenly under the continuous reciprocating lateral movement and the reciprocating movement of the brush roller 19.

[0029] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0030] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A grinding device suitable for the outer surface of an aluminum plate or strip, comprising: A grinding platform (1), a bearing disc (2), a bearing plate (3), a mounting bracket (4), a transverse movement structure (5), a reciprocating structure (10) and a grinding structure (15), characterized in that a U-shaped groove is provided on the upper surface of the grinding platform (1), a bearing disc (2) is arranged inside the U-shaped groove, a bearing plate (3) is arranged below the bearing disc (2), two ends of the bearing plate (3) are fixedly connected to the inner walls of the U-shaped groove on the upper surface of the grinding platform (1), a sliding groove is provided on the upper surface of the bearing plate (3), a mounting bracket (4) is arranged below the bearing plate (3), the upper surfaces of the two ends of the mounting bracket (4) are fixedly connected to the lower surface of the grinding platform (1), and the mounting bracket (4) is provided on the lower surface of the grinding platform (1). A traverse structure (5) is arranged on the upper surface of the mounting bracket (4), and the traverse structure (5) comprises a first servo motor (6), a swing plate (7), a transmission plate (8) and a slide block (9). Reciprocating structures (10) are arranged on both sides of the U-shaped groove on the upper surface of the grinding platform (1), and the reciprocating structure (10) comprises a guide rail (11), a translation block (12), a threaded rod (13) and a second servo motor (14). A grinding structure (15) is arranged above the two sets of reciprocating structures (10), and the grinding structure (15) comprises a third servo motor (16), a first bevel gear (17), a second bevel gear (18) and a brush roller (19).

2. The grinding device for the outer surface of an aluminum plate strip according to claim 1 is characterized in that: The lower surface of the grinding platform (1) is provided with four groups of support columns (20), the upper end of each group of support columns (20) is fixedly connected to the lower surface of the grinding platform (1), the inner walls of the U-shaped groove on the upper surface of the grinding platform (1) are provided with sliding grooves, the two sides of the carrying plate (2) are movably arranged inside the sliding grooves on both sides of the U-shaped groove, the upper surface of the carrying plate (2) is fixedly connected with a plurality of groups of suction cups (21), and the upper surface of the suction cups (21) adsorbs the aluminum plate strip body (22).

3. The grinding device for the outer surface of an aluminum plate strip according to claim 1 is characterized in that: The lower surface of the first servo motor (6) is fixedly connected to the upper surface of the mounting bracket (4); the power output end of the first servo motor (6) is fixedly connected to a swing plate (7); a transmission plate (8) is arranged on the side surface of the swing plate (7) away from the first servo motor (6); through holes are provided on the side surfaces at both ends of the transmission plate (8); connecting rods (23) are rotatably connected inside the through holes on the side surfaces at both ends of the transmission plate (8); one end of the connecting rod (23) is fixedly connected to the side surface of the swing plate (7) away from the first servo motor (6) inside the through hole on the side surface of one end of the transmission plate (8); a slider (9) is arranged on the side surface of the transmission plate (8) away from the swing plate (7); the slider (9) is slidably arranged inside a slide groove on the upper surface of the bearing plate (3); one end of the connecting rod (23) is fixedly connected to the side surface of the slider (9) inside the through hole on the side surface of the other end of the transmission plate (8); and the upper surface of the slider (9) is fixedly connected to the lower surface of the bearing plate (2).

4. The grinding device for the outer surface of an aluminum plate strip according to claim 1 is characterized in that: The lower surface of the guide rail (11) is fixedly connected to the upper surface of the grinding platform (1); a partition plate (24) is fixedly connected inside one end of the guide rail (11); a through hole is provided on the side surface of the partition plate (24); a translation block (12) is provided on one side of the partition plate (24); a second servo motor (14) is provided on the other side of the partition plate (24); the bottom of the second servo motor (14) is fixedly connected to the bottom of the guide rail (11); a threaded hole is provided on the side surface of the translation block (12); a threaded rod (13) is provided inside the threaded hole; one end of the threaded rod (13) is rotatably connected to the inner wall of the guide rail (11); the other end of the threaded rod (13) passes through the through hole on the side surface of the partition plate (24) and is fixedly connected to the power output end of the second servo motor (14).

5. The grinding device for the outer surface of an aluminum plate strip according to claim 1, characterized in that: The upper surface of the translation block (12) is fixedly connected with a mounting ear plate (25), and a through hole is provided on the upper side surface of each group of mounting ear plates (25).

6. The grinding device for the outer surface of an aluminum plate strip according to claim 1, characterized in that: One side of the third servo motor (16) is fixedly connected to the side surface of the ear plate (25) mounted on the upper surface of the translation block (12) in one of the reciprocating structures (10); two ends of the brush roller (19) are rotatably arranged inside the through holes on the upper end side surfaces of the ear plates (25) mounted on the upper surfaces of the translation blocks (12) in the two reciprocating structures (10); the brush roller (19) is attached to the upper surface of the aluminum plate strip body (22); the power output end of the third servo motor (16) is fixedly connected to the first bevel gear (17); one side of the first bevel gear (17) is meshed with the second bevel gear (18); the second bevel gear (18) is fixedly connected to the outer surface of one end of the brush roller (19).

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