Grinding device capable of preventing chippings from splashing

Abstract

The utility model discloses a polishing device capable of preventing scraps from splashing, which belongs to the technical field of synchronous edging of wood boards and comprises a case, and a rolling support component used for rolling support of the wood boards is arranged at the inner bottom of the case. The bottom in the machine box is provided with a pressing connection assembly with the inner top used for rolling pressing connection of a wood board. The inner wall of the machine box is connected with a reciprocating type grinding assembly capable of conducting up-down reciprocating movement grinding, and the reciprocating type grinding assembly and the rolling supporting assembly are arranged in a staggered mode. The reciprocating type grinding assembly comprises a linkage driving structure, an alternating type height adjusting assembly and grinding assemblies, the multiple grinding assemblies are evenly arranged on the left side and the right side in the machine box, the grinding assemblies are connected with the alternating type height adjusting assembly, and the height adjusting assembly is connected with the linkage driving structure during alternating; the inner walls of the left side and the right side of the machine box are evenly connected with dust collection assemblies used for collecting dust. By means of the mode, after the reciprocating type grinding assembly is arranged, grinding can be carried out when chippings are consistent with the grinding driving direction, and the grinding effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of synchronous edge grinding of wooden boards, in particular to a grinding device capable of preventing debris from splashing. Background Art

[0002] In the processing of wooden boards, in order to make beautiful finished products, many use pure solid wood, that is, directly cut from a whole wood. After the wooden board is cut, an edge grinder is needed to grind both sides.

[0003] For example, Chinese patent CN211388103U discloses a double-sided synchronous edge grinding machine for wood board processing, including a workbench arranged front and back and a conveyor belt sleeved on the workbench, motors are arranged on both sides of the upper end of the workbench, and the lower end of the motor is connected to a vertical grinding roller for synchronously grinding the left and right sides of the wood board, the motors on both sides are symmetrically arranged about the conveyor belt, and the workbench is provided with an elastic guide mechanism that can move the grinding rollers forward and backward and left and right when pressed. By loosening the bolts, the distance between the two grinding rollers can be adjusted left and right to adapt to different wood boards, and at least two grinding rollers are arranged on the same side to ensure that the wood board does not tilt forward, and relative to the original grinding rollers staggered left and right, the grinding rollers on both sides are arranged relative to each other, generating a tough extrusion force, ensuring the grinding strength, and avoiding jamming, thereby ensuring the grinding effect, ensuring uniform grinding, and avoiding the situation where the wood board is out of the way of grinding.

[0004] The grinding structures in the above patents are at the same height. If the debris is consistent with the grinding drive direction, grinding cannot be performed, affecting the grinding effect.

[0005] Based on this, the utility model designs a grinding device that prevents debris from splashing to solve the above problem. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides a grinding device which can prevent debris from splashing.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A grinding device for preventing debris from splashing, comprising a chassis:

[0009] The inner bottom of the chassis is provided with a rolling support assembly for rolling support of the wooden board;

[0010] The inner bottom of the chassis is provided with a crimping assembly for rolling crimping of wooden boards;

[0011] The inner wall of the chassis is connected with a reciprocating grinding assembly capable of reciprocating up and down grinding, and the reciprocating grinding assembly and the rolling support assembly are arranged alternately;

[0012] The reciprocating grinding assembly includes a linkage drive structure, an alternating height adjustment assembly and a grinding assembly. A plurality of grinding assemblies are evenly arranged on the left and right sides of the chassis. The grinding assemblies are connected to the alternating height adjustment assemblies. When alternating, the height adjustment assemblies are connected to the linkage drive structure.

[0013] The inner walls on the left and right sides of the chassis are evenly connected with multiple dust suction components for dust suction, and the dust suction component is connected to the top of the rolling support component. The suction end of the dust suction component covers the grinding end of the reciprocating grinding component, and when the grinding component rotates, dust enters the suction end of the dust suction component.

[0014] Furthermore, the rolling support assembly includes a first frame, a second frame, a first roller and a second roller, the front and rear ends of the chassis are fixedly connected to the first frame, a plurality of second rollers are rotatably connected to the inner wall of the first frame at equal intervals, a plurality of second frames are fixedly connected to the left and right sides of the inner bottom wall in the chassis at equal intervals along the length direction, a plurality of first rollers are rotatably connected to the inner wall of each second frame at equal intervals, and the top of the first roller is flush with the top of the second roller.

[0015] Furthermore, the crimping assembly includes a third frame and a clamping wheel. The third frame is fixedly installed on the top of the chassis. The bottom of the third frame is rotatably connected with multiple clamping wheels at equal intervals along the length direction. The bottoms of the multiple clamping wheels can be in contact with the wooden board.

[0016] Furthermore, the linkage driving structure includes a rotating rod, a third synchronous wheel, a synchronous belt, a first synchronous wheel, a second synchronous wheel, a fifth frame and a second motor. A plurality of rotating rods are rotatably connected to the left and right sides of the bottom wall of the chassis at equal intervals. The plurality of rotating rods are arranged alternately with the plurality of second frames. The third synchronous wheel is fixedly connected to the outer wall of the bottom of each rotating rod. The first synchronous wheels are rotatably connected to the outside of the rotating rod at equal intervals inside the chassis. The plurality of first synchronous wheels and the plurality of third synchronous wheels are arranged alternately. The second synchronous wheel is rotatably connected to the outside of the third synchronous wheel inside the chassis. The second synchronous wheel, the first synchronous wheel and the third synchronous wheel are movably connected by a synchronous belt. The fifth frame is fixedly connected to the left and right sides of the bottom wall of the chassis. The second motor is fixedly connected to the top of the fifth frame, and the output end of the second motor is fixedly connected to a second synchronous wheel on the same side.

[0017] Furthermore, the alternating height adjustment component includes a first motor, a fourth frame, a rotating plate, a driving rod, a transverse groove, a guide rail component, a U-shaped plate, a Z-shaped rod, a connecting ring, an oblique square frame, a guide seat, a polygonal rod and a square sliding hole. The fourth frame is fixedly installed at the middle of the inner bottom wall of the chassis, the top of the fourth frame is fixedly connected to the first motor, the driving end of the first motor rotates through the fourth frame and is fixedly connected to the rotating plate, the bottom of the outer end of the rotating plate is fixedly connected to the driving rod, the guide rails on the two guide rail assemblies are arranged in parallel and at intervals on the inner bottom wall of the chassis, the two sides of the bottom of the U-shaped plate are respectively fixedly connected to the sliders on the two guide rail assemblies, and the portion between the front and rear lateral portions of the U-shaped plate is opened. A horizontal groove is provided for slidingly fitting with the driving rod, a plurality of oblique square frames are evenly connected to the vertical parts on the left and right sides of the U-shaped plate, and the inclination directions of the two adjacent oblique square frames are opposite, and a guide seat is fixedly connected at equal intervals on the inner bottom wall of the chassis and located on the outside of the guide rail assembly, the upright part of the Z-shaped rod slides through the straight sliding hole on the top of the guide seat, the horizontal part of the bottom end of the Z-shaped rod is inserted into the sliding groove of the oblique square frame for sliding connection, a connecting ring is fixedly connected to the horizontal part of the top end of the Z-shaped rod, and the connecting ring is rotatably connected to the outer wall of the top of the polygonal rod through a bearing, a square sliding hole is provided on the top of the rotating rod for sliding connection with the polygonal rod, and the bottom of the polygonal rod is inserted into the square sliding hole for sliding connection.

[0018] Furthermore, the grinding assembly includes a grinding wheel and a straight connecting shaft, the bottom of the straight connecting shaft is fixedly installed on the top of the polygonal rod, the top of the straight connecting shaft is fixedly connected with the grinding wheel, and the wooden board moves between the front and rear adjacent grinding wheels.

[0019] Furthermore, the dust suction assembly includes a dust suction pipe and a dust suction hood. The dust suction pipe is fixedly connected to the inner wall of the chassis. The dust suction pipe is communicated and fixedly connected to the dust suction hood. The opening of the dust suction hood is set toward the grinding wheel, and the end of the dust suction hood away from the grinding wheel is fixedly connected to the second frame.

[0020] Furthermore, one end of the dust suction pipe away from the dust suction hood passes through the side wall of the chassis and extends to the outside and is connected to an external high-pressure wind dust suction device.

[0021] Furthermore, the top side height of the dust hood opening is greater than the upward moving height of the grinding wheel, and the bottom side height of the dust hood opening is lower than the downward moving height of the grinding wheel.

[0022] Beneficial Effects

[0023] In the utility model, the wooden board enters the chassis through a rolling support assembly, the rolling support assembly and the crimping assembly cooperate to crimp the wooden board and guide it, the linkage drive structure drives the alternating height adjustment assembly to rotate, so that the alternating height adjustment assembly drives the grinding assembly to rotate while the alternating height adjustment assembly drives the grinding assembly to move up and down, so that the grinding assembly rotates and moves up and down at the same time, so as to achieve staggered grinding of the wooden board, which is beneficial for grinding when the debris is consistent with the grinding drive direction, and the grinding effect is good. The grinding assembly, the rolling support assembly and the crimping assembly cooperate to drive the wooden board to move; in addition, the dust suction assembly completely absorbs the dust generated by the grinding assembly to prevent the debris from splashing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 The main structure of the grinding device for preventing debris from splashing is three-dimensional. Figure 1 ;

[0026] Figure 2 This is a front view of the structure of a grinding device for preventing debris from splashing according to the utility model;

[0027] Figure 3 This is a left view of the main body of a grinding device for preventing debris from splashing according to the utility model;

[0028] Figure 4 The main structure of the grinding device for preventing debris from splashing is three-dimensional. Figure 2 ;

[0029] Figure 5 The main structure of the grinding device for preventing debris from splashing is three-dimensional. Figure 3 ;

[0030] Figure 6 For along Figure 2 AA direction cross-sectional view;

[0031] Figure 7 For along Figure 3 BB direction cross-sectional view;

[0032] Figure 8 This is a partial enlarged view of the first motor and its connection structure.

[0033] The numbers in the figure represent:

[0034] 1. Chassis 2. Rolling support assembly 21. First frame 22. Second frame 23. First roller 24. Second roller 3. Crimping assembly 31. Third frame 32. Clamping wheel 4. Dust suction assembly 41. Dust suction pipe 42. Dust hood 5. Reciprocating grinding assembly 51. First motor 52. Fourth frame 53. Rotating plate 54. Driving rod 55. Transverse groove 56. Guide rail assembly 57. U-shaped plate 58. Z-shaped rod 59. Connecting ring 510. Oblique square frame 511. Guide seat 512. Grinding wheel 513. Polygonal rod 514. Rotating rod 515. Third synchronous wheel 516. Synchronous belt 517. First synchronous wheel 518. Second synchronous wheel 519. Fifth frame 520. Second motor 521. Square slide hole 522. Straight connecting shaft. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] The utility model is further described below in conjunction with embodiments.

[0037] In some embodiments, please refer to the attached instructions. Figure 1-7 A grinding device for preventing debris from splashing includes a chassis 1, a rolling support assembly 2 for rolling support of a wooden board is provided at the inner bottom of the chassis 1, a crimping assembly 3 for rolling crimping of the wooden board is provided at the inner bottom of the chassis 1, a reciprocating grinding assembly 5 with up and down reciprocating grinding is connected to the inner wall of the chassis 1, and the reciprocating grinding assembly 5 and the rolling support assembly 2 are staggered.

[0038] The reciprocating grinding assembly 5 includes a linkage drive structure, an alternating height adjustment assembly and a grinding assembly. A plurality of grinding assemblies are evenly arranged on the left and right sides of the chassis 1. The grinding assembly is connected to the alternating height adjustment assembly, and the height adjustment assembly is connected to the linkage drive structure when alternating.

[0039] The inner walls on the left and right sides of the chassis 1 are evenly connected with multiple dust suction components 4 for dust suction, and the dust suction component 4 is connected to the rolling support component 2. The suction end of the dust suction component 4 covers the grinding end of the reciprocating grinding component 5, and when the grinding component rotates, dust enters the suction end of the dust suction component 4.

[0040] The wooden board enters the chassis 1 through the rolling support assembly 2, and the rolling support assembly 2 and the crimping assembly 3 cooperate to crimp and guide the wooden board. The linkage drive structure of the reciprocating grinding assembly 5 drives the alternating height adjustment assembly to rotate, and the alternating height adjustment assembly drives the grinding assembly to rotate. At the same time, the alternating height adjustment assembly drives the grinding assembly to move up and down, so that the grinding assembly can rotate and move up and down at the same time, so as to achieve staggered grinding of the wooden board, which is conducive to grinding when the debris is consistent with the grinding drive direction, and the grinding effect is good. The grinding assembly, rolling support assembly 2 and crimping assembly 3 cooperate to drive the wooden board to move; in addition, the dust suction assembly 4 completely absorbs the dust generated by the grinding assembly of the reciprocating grinding assembly 5 on the template, which can prevent debris from splashing.

[0041] In some embodiments, please refer to the attached instructions. Figure 1-7 The rolling support assembly 2 includes a first frame 21, a second frame 22, a first roller 23 and a second roller 24. The first frame 21 is fixedly connected to the front and rear ends of the chassis 1, and a plurality of second rollers 24 are rotatably connected to the inner wall of the first frame 21 at equal intervals. A plurality of second frames 22 are fixedly connected to the inner wall of the chassis 1 at equal intervals along the length direction. A plurality of first rollers 23 are rotatably connected to the inner wall of each second frame 22 at equal intervals, and the top of the first roller 23 is flush with the top of the second roller 24.

[0042] When in use, the wooden board is placed on the second roller 24 located on the front side of the chassis 1, and the external power drives the wooden board to move inward along the second roller 24, and then the polishing assembly, rolling support assembly 2 and crimping assembly 3 cooperate to drive the wooden board to move on the first roller 23, and finally the wooden board moves to the second roller 24 on the right side of the rear side of the chassis 1.

[0043] The spacing between the rearmost second roller 24 on the first rack 21 on the front side of the chassis 1 and the frontmost first roller 23 on the second rack 22 on the front side inside the chassis 1, the spacing between the frontmost second roller 24 on the first rack 21 on the rear side of the chassis 1 and the rearmost first roller 23 on the rearmost second rack 22 on the rear side inside the chassis 1 are less than the length of the wooden board, and the minimum spacing between the first rollers 23 of two adjacent second racks 22 is less than the length of the wooden board, which can prevent the wooden board from falling into the chassis 1.

[0044] The crimping assembly 3 includes a third frame 31 and a clamping wheel 32. The third frame 31 is fixedly mounted on the top of the chassis 1. The bottom of the third frame 31 is rotatably connected to the clamping wheels 32 at equal intervals along the length direction. The bottoms of the multiple clamping wheels 32 can be in contact with the wooden board. When the wooden board moves on the first roller 23 and the second roller 24, the bottom of the clamping wheel 32 presses on the top surface of the wooden board to prevent the wooden board from warping.

[0045] In some embodiments, please refer to the attached instructions. Figure 1-8The linkage driving structure includes a rotating rod 514, a third synchronous wheel 515, a synchronous belt 516, a first synchronous wheel 517, a second synchronous wheel 518, a fifth frame 519 and a second motor 520. The left and right sides of the inner bottom wall of the chassis 1 are rotatably connected with a plurality of rotating rods 514 at equal intervals. The plurality of rotating rods 514 are arranged alternately with the plurality of second frames 22. The bottom of the outer wall of each rotating rod 514 is fixedly connected with a third synchronous wheel 515. The first synchronous wheel 517 is rotatably connected with an equal interval inside the chassis 1 and outside the rotating rod 514. A plurality of first synchronous wheels 517 and a plurality of third synchronous wheels 515 are arranged alternately, and a second synchronous wheel 518 is rotatably connected inside the chassis 1 and located outside the third synchronous wheel 515, and the second synchronous wheel 518, the first synchronous wheel 517 and the third synchronous wheel 515 are movably connected through a synchronous belt 516, and a fifth frame 519 is fixedly connected to the left and right sides of the bottom wall of the chassis 1, and a second motor 520 is fixedly connected to the top of the fifth frame 519, and an output end of the second motor 520 is fixedly connected to a second synchronous wheel 518 on the same side.

[0046] The alternating height adjustment assembly includes a first motor 51, a fourth frame 52, a rotating plate 53, a driving rod 54, a transverse groove 55, a guide rail assembly 56, a U-shaped plate 57, a Z-shaped rod 58, a connecting ring 59, an oblique square frame 510, a guide seat 511, a polygonal rod 513 and a square sliding hole 521. The fourth frame 52 is fixedly installed at the middle of the inner bottom wall of the chassis 1. The top of the fourth frame 52 is fixedly connected with the first motor 51. The driving end of the first motor 51 rotates through the fourth frame 52 and is fixedly connected with the rotating plate 53. The bottom of the outer end of the rotating plate 53 is fixedly connected with the driving rod 54. The guide rails on the two guide rail assemblies 56 are arranged in parallel and spaced apart on the inner bottom wall of the chassis 1. The two sides of the bottom of the U-shaped plate 57 are respectively fixedly connected to the sliders on the two guide rail assemblies 56. The portion between the front and rear lateral portions of the U-shaped plate 57 is opened There is a transverse groove 55 that is slidably connected to the driving rod 54, and a plurality of oblique square frames 510 are evenly connected to the vertical parts on the left and right sides of the U-shaped plate 57, and the inclination directions of the two adjacent oblique square frames 510 are opposite. A guide seat 511 is fixedly connected at equal intervals on the inner bottom wall of the chassis 1 and located on the outside of the guide rail assembly 56. The upright part of the Z-shaped rod 58 slides through the straight sliding hole at the top of the guide seat 511, and the horizontal part of the bottom end of the Z-shaped rod 58 is inserted into the sliding groove of the oblique square frame 510 for slidable connection. A connecting ring 59 is fixedly connected to the horizontal part of the top end of the Z-shaped rod 58, and the connecting ring 59 is rotatably connected to the top outer wall of the polygonal rod 513 through a bearing. A square sliding hole 521 that is slidably connected to the polygonal rod 513 is opened on the top of the rotating rod 514, and the bottom of the polygonal rod 513 is inserted into the square sliding hole 521 for slidable connection.

[0047] The grinding assembly includes a grinding wheel 512 and a straight connecting shaft 522. The bottom of the straight connecting shaft 522 is fixedly installed on the top of the polygonal rod 513. The top of the straight connecting shaft 522 is fixedly connected with the grinding wheel 512. The wooden board moves between the adjacent grinding wheels 512 on the left and right.

[0048] When the wooden board moves, the second motor 520 drives the second synchronous wheel 518 to rotate, and the third synchronous wheel 515 is driven to rotate under the cooperation of the synchronous belt 516 and the first synchronous wheel 517. Under the cooperation of the polygonal rod 513 and the square sliding hole 521, the plurality of third synchronous wheels 515 drive the corresponding straight connecting shafts 522 to rotate, and the straight connecting shafts 522 drive the grinding wheel 512 to rotate. At the same time, the first motor 51 drives the rotating plate 53 to rotate, and the rotating plate 53 drives the driving rod 54 to rotate. The positioning coordination drives the U-shaped plate 57 to reciprocate along the guide rail assembly 56, and the U-shaped plate 57 drives multiple oblique square frames 510 to reciprocate. Under the action of the oblique square frame 510, the Z-shaped rod 58 moves up and down in the guide seat 511, and the Z-shaped rod 58 drives the connecting ring 59 to move up and down, and the connecting ring 59 drives the straight connecting shaft 522 to move up and down, and the straight connecting shaft 522 drives the grinding wheel 512 to move up and down, so that the grinding wheel 512 can rotate and move up and down at the same time, so as to achieve staggered grinding of the wooden board, and the grinding effect is good.

[0049] In some embodiments, please refer to the attached instructions. Figure 1-6 The dust suction assembly 4 includes a dust suction pipe 41 and a dust suction hood 42. The dust suction pipe 41 is fixedly connected to the inner wall of the chassis 1. The dust suction pipe 41 is communicated with and fixedly connected to the dust suction hood 42. The opening of the dust suction hood 42 is set toward the grinding wheel 512. The end of the dust suction hood 42 away from the grinding wheel 512 is fixedly connected to the second frame 22.

[0050] Preferably, one end of the dust suction pipe 41 away from the dust suction cover 42 passes through the side wall of the chassis 1 and extends to the outside and is connected to an external high-pressure wind dust suction device. The top side height of the dust suction cover 42 opening is greater than the upward movement height of the grinding wheel 512, and the bottom side height of the dust suction cover 42 opening is lower than the downward movement height of the grinding wheel 512, so that when the grinding wheel 512 moves up and down to the top and bottom sides, the opening of the dust suction cover 42 can cover the grinding wheel 512, so as to facilitate the absorption of all dust.

[0051] When the grinding wheel 512 rotates to grind the wooden board, the grinding wheel 512 blows the dust generated by grinding toward the opening of the dust cover 42 and discharges it outward through the dust suction pipe 41, thereby completely absorbing the dust generated by the grinding assembly and preventing debris from splashing.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A grinding device for preventing debris from splashing, comprising a housing (1), characterized in that: The inner bottom of the chassis (1) is provided with a rolling support assembly (2) for rolling support of the wooden board; The inner bottom of the chassis (1) is provided with a crimping assembly (3) for rolling crimping of wooden boards; The inner wall of the chassis (1) is connected to a reciprocating grinding assembly (5) capable of grinding by reciprocating motion up and down, and the reciprocating grinding assembly (5) and the rolling support assembly (2) are arranged in an alternating manner; The reciprocating grinding assembly (5) comprises a linkage drive structure, an alternating height adjustment assembly and a grinding assembly. A plurality of grinding assemblies are evenly arranged on the left and right sides of the chassis (1). The grinding assemblies are connected to the alternating height adjustment assemblies. When alternating, the height adjustment assemblies are connected to the linkage drive structure. A plurality of dust collecting components (4) for collecting dust are evenly connected to the inner walls on the left and right sides of the chassis (1), and the dust collecting components (4) are connected to the top of the rolling support component (2). The suction end of the dust collecting component (4) covers the grinding end of the reciprocating grinding component (5), and when the grinding component rotates, dust enters the suction end of the dust collecting component (4).

2. The grinding device for preventing debris splashing according to claim 1, characterized in that: The rolling support assembly (2) comprises a first frame (21), a second frame (22), a first roller (23) and a second roller (24); the first frame (21) is fixedly connected to the front and rear ends of the chassis (1); a plurality of second rollers (24) are rotatably connected to the inner wall of the first frame (21) at equal intervals; a plurality of second frames (22) are fixedly connected to the left and right sides of the inner bottom wall of the chassis (1) at equal intervals along the length direction; a plurality of first rollers (23) are rotatably connected to the inner wall of each second frame (22) at equal intervals, and the top of the first roller (23) is flush with the top of the second roller (24).

3. The grinding device for preventing debris splashing according to claim 2, characterized in that: The crimping assembly (3) comprises a third frame (31) and a clamping wheel (32); the third frame (31) is fixedly mounted on the top of the chassis (1); a plurality of clamping wheels (32) are rotatably connected at equal intervals along the length direction at the bottom of the third frame (31); the bottoms of the plurality of clamping wheels (32) are capable of being in contact with the wooden board.

4. The grinding device for preventing debris splashing according to claim 3, characterized in that: The linkage drive structure comprises a rotating rod (514), a third synchronous wheel (515), a synchronous belt (516), a first synchronous wheel (517), a second synchronous wheel (518), a fifth frame (519) and a second motor (520); a plurality of rotating rods (514) are rotatably connected at equal intervals on the left and right sides of the inner bottom wall of the chassis (1); the plurality of rotating rods (514) and the plurality of second frames (22) are arranged in a staggered manner; the bottom of the outer wall of each rotating rod (514) is fixedly connected to the third synchronous wheel (515); and the first synchronous wheel (517) is rotatably connected at equal intervals inside the chassis (1) and located outside the rotating rod (514). A plurality of first synchronous wheels (517) and a plurality of third synchronous wheels (515) are arranged alternately, a second synchronous wheel (518) is rotatably connected inside the chassis (1) and located outside the third synchronous wheel (515), the second synchronous wheel (518), the first synchronous wheel (517) and the third synchronous wheel (515) are movably connected via a synchronous belt (516), a fifth frame (519) is fixedly connected to both left and right sides of the bottom wall of the chassis (1), a second motor (520) is fixedly connected to the top of the fifth frame (519), and an output end of the second motor (520) is fixedly connected to a second synchronous wheel (518) on the same side.

5. The grinding device for preventing debris splashing according to claim 4, characterized in that: The alternating height adjustment assembly comprises a first motor (51), a fourth frame (52), a rotating plate (53), a driving rod (54), a transverse groove (55), a guide rail assembly (56), a U-shaped plate (57), a Z-shaped rod (58), a connecting ring (59), an oblique square frame (510), a guide seat (511), a polygonal rod (513) and a square sliding hole (521). The fourth frame (52) is fixedly mounted on the middle part of the inner bottom wall of the chassis (1). ) is fixedly connected to the top of the chassis (1), the driving end of the first motor (51) rotates through the fourth frame (52) and is fixedly connected to the rotating plate (53), the bottom of the outer end of the rotating plate (53) is fixedly connected to the driving rod (54), the guide rails on the two guide rail assemblies (56) are arranged in parallel and spaced apart on the inner bottom wall of the chassis (1), the two sides of the bottom of the U-shaped plate (57) are respectively fixedly connected to the sliders on the two guide rail assemblies (56), and the U-shaped plate (57) is fixedly connected to the front and rear transverse parts. A transverse groove (55) is provided at the position between the two guide rails (56) and the driving rod (54) for sliding connection therewith; a plurality of oblique square frames (510) are evenly connected to the vertical positions on the left and right sides of the U-shaped plate (57); and the inclination directions of two adjacent oblique square frames (510) are opposite; a guide seat (511) is fixedly connected at equal intervals on the inner bottom wall of the chassis (1) and located outside the guide rail assembly (56); the upright position of the Z-shaped rod (58) slides through the straight sliding hole at the top of the guide seat (511); and the Z-shaped rod (58) is fixedly connected to the guide seat (511) at equal intervals. The horizontal part of the bottom end of the rod (58) is inserted into the slide groove on the oblique square frame (510) for fitting and sliding connection. The top horizontal part of the Z-shaped rod (58) is fixedly connected with a connecting ring (59). The connecting ring (59) is rotatably connected to the top outer wall of the polygonal rod (513) through a bearing. The top of the rotating rod (514) is provided with a square sliding hole (521) for fitting and sliding connection with the polygonal rod (513). The bottom of the polygonal rod (513) is inserted into the square sliding hole (521) for sliding connection.

6. The grinding device for preventing debris splashing according to claim 5, characterized in that: The grinding assembly comprises a grinding wheel (512) and a straight connecting shaft (522), the bottom of the straight connecting shaft (522) is fixedly mounted on the top of the polygonal rod (513), the top of the straight connecting shaft (522) is fixedly connected with the grinding wheel (512), and the wooden board moves between the grinding wheels (512) adjacent to each other on the left and right.

7. The grinding device for preventing debris splashing according to claim 6, characterized in that: The dust collection assembly (4) comprises a dust collection pipe (41) and a dust collection hood (42); the dust collection pipe (41) is fixedly connected to the inner wall of the chassis (1); the dust collection pipe (41) and the dust collection hood (42) are in communication and fixedly connected; the opening of the dust collection hood (42) is arranged toward the grinding wheel (512); and the end of the dust collection hood (42) away from the grinding wheel (512) is fixedly connected to the second frame (22).

8. The grinding device for preventing debris splashing according to claim 7, characterized in that: One end of the dust suction pipe (41) away from the dust suction cover (42) passes through the side wall of the chassis (1) and extends to the outside, where it is connected to an external high-pressure wind dust suction device.

9. The grinding device for preventing debris splashing according to claim 8, characterized in that: The height of the top side of the opening of the dust hood (42) is greater than the upward movement height of the grinding wheel (512), and the height of the bottom side of the opening of the dust hood (42) is lower than the downward movement height of the grinding wheel (512).

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