CN108214304B

CN108214304B - Grinding device with grinding block capable of vertically moving

Info

Publication number: CN108214304B
Application number: CN201810016235.8A
Authority: CN
Inventors: 曹婉丽; 刘祖仑; 火元辰
Original assignee: Jieyang Hesheng Machinery Stone Co Ltd
Current assignee: JIEYANG HESHENG MACHINERY STONE CO., LTD.
Priority date: 2018-01-08
Filing date: 2018-01-08
Publication date: 2019-12-17
Anticipated expiration: 2038-01-08
Also published as: CN108214304A

Abstract

The invention discloses a polishing device with a vertically movable polishing block, which comprises a shell, wherein the upper surface of the inner wall of the shell is fixedly connected with a machine body of a first motor, the surface of an output shaft of the first motor is fixedly connected with a first gear, the first gear is meshed with a second gear, the second gear is fixedly connected with the surface of a threaded cylinder, and a first bearing is fixedly connected to the position, above the second gear, on the surface of the threaded cylinder. This grinding device that sanding block can vertically remove through first motor, a screw thread section of thick bamboo, the screw thread post, the second motor, sanding block, place the board, the telescoping device, the third motor, the cam and collect the box to can highly adjusting sanding block, thereby can make the people of different heights more convenient polish the work piece, can improve the speed of polishing to the work piece, can utilize simultaneously to collect that the box can be more convenient clears up the sweeps, thereby can guarantee the effect of polishing to the work piece.

Description

Grinding device with grinding block capable of vertically moving

Technical Field

The invention relates to the technical field of grinding, in particular to a grinding device with a grinding block capable of moving vertically.

Background

The grinding operation is a common technological means without cutting, the last process of the existing workpiece processing is grinding and polishing, and the grinding process can obtain a good smooth surface; the existing polishing process can be divided into manual polishing and machine polishing according to the difference of the size and the type of a product, a good bench worker can polish a smooth surface better than that of a machine, but the manual polishing operation efficiency is low, and the industrial large-batch requirements cannot be met; along with the development of science and technology, more equipment of polishing is also researched out, but the regulation of being not convenient for in the vertical direction of most equipment of polishing on the market, and lack abrasive dust clearing device, after the operation of polishing, rely on sweeping the clear away of technology completion abrasive dust usually, be difficult for work efficiency's promotion, and the abrasive dust that sweeps also can bring harmful effects to the operation environment of mill.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a polishing device with a vertically movable polishing block, which solves the problems that the vertical adjustment of the polishing device in the current market is inflexible, and abrasive dust is inconvenient to clean.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a polishing device with a vertically movable polishing block comprises a shell, wherein the upper surface of the inner wall of the shell is fixedly connected with a machine body of a first motor, the surface of an output shaft of the first motor is fixedly connected with a first gear, the first gear is meshed with a second gear, the second gear is fixedly connected with the surface of a threaded cylinder, a first bearing is fixedly connected to the position, above the second gear, of the surface of the threaded cylinder, two side faces of the first bearing are fixedly connected with the upper surface of the inner wall of the shell through two first fixing blocks, a threaded column is connected with the inner thread of the threaded cylinder, the bottom end of the threaded column is fixedly connected with the upper surface of a supporting plate, two side faces of the supporting plate are fixedly connected with opposite faces of two sliding blocks, the two sliding blocks are respectively and slidably connected into two sliding grooves formed in two side faces of the inner wall of the shell, and the upper surface of the supporting plate is fixedly connected with the machine, the output shaft of second motor and the top fixed connection of first pivot, the second bearing has been cup jointed on the surface of first pivot, the second bearing joint is at the upper surface of backup pad, the second bearing is located the left side of screw thread post, the fixed surface of first pivot is connected with the action wheel, the action wheel passes through the belt and is connected from the driving wheel transmission, from the surface of driving wheel fixed connection in the second pivot, the third bearing has been cup jointed on the surface of second pivot, the lower surface of third bearing joint in the backup pad, the bottom of pivot and the last fixed surface of sanding block are connected.

The shell is internally provided with a placing plate, the upper surface of the placing plate is provided with a plurality of through holes, the lower surface of the placing plate is respectively fixedly connected with the upper surfaces of the two supporting blocks through four telescopic devices which are respectively positioned at the positions, close to four corners, of the lower surface of the placing plate, the front surface of the inner wall of the shell is fixedly connected with one end of the back surface of the supporting rod, the upper surface of the supporting rod is fixedly connected with the machine body of a third motor, the surface of an output shaft of the third motor is fixedly connected with a cam, a collecting box is arranged in the shell, the lower surface of the collecting box is respectively fixedly connected with the upper surfaces of the two sliding sleeves through two third fixed blocks, sliding rods are arranged in the two sliding sleeves, two ends of each sliding rod are respectively fixedly connected with the opposite surfaces of the two connecting blocks, and, the lower surface of the collecting box is in lap joint with the upper surfaces of the two idler wheels, the lower surfaces of the two idler wheels are fixedly connected with the lower surface of the inner wall of the shell, the two idler wheels are symmetrically arranged on the left side and the right side of the two sliding rods, and the two idler wheels are located on the lower surface of the inner wall of the shell and close to the front position of the shell.

Preferably, the lower surface of the collecting box is provided with a material taking port, and a baffle is arranged at the position of the lower surface of the collecting box corresponding to the material taking port.

Preferably, the lower surface of casing is provided with the supporting leg, the quantity of supporting leg is four, and four supporting legs are located the position that the casing lower surface is close to the four corners respectively.

Preferably, the left and right sides face of the inner wall of the shell is provided with limiting blocks, and the two limiting blocks are located at the positions between the supporting plate and the placing plate.

Preferably, a storage battery is arranged on the upper surface of the inner wall of the shell and is positioned on the right side of the first motor.

preferably, the left side face of the shell is provided with a control panel, the input end of the control panel is electrically connected with the output end of the storage battery, and the output end of the control panel is electrically connected with the input ends of the first motor, the second motor and the third motor respectively.

Preferably, the telescopic device comprises a telescopic rod and a spring, the spring is sleeved on the surface of the telescopic rod, and two ends of the telescopic rod and the spring are fixedly connected with opposite surfaces of the placing plate and the supporting block respectively.

Preferably, the slider is T-shaped, and the chute is T-shaped.

(III) advantageous effects

The invention provides a polishing device with a polishing block capable of vertically moving, which has the following beneficial effects:

(1) The polishing device with the vertically movable polishing block controls the working of the first motor to rotate the threaded cylinder, controls the rotating direction of the output shaft of the first motor so as to control the up-and-down movement of the threaded cylinder, enables the polishing block to rotate by the output shaft of the second motor, enables the cam to be contacted with the placing plate intermittently when the third motor works so as to better vibrate the placing plate by being matched with the telescopic device, and enables the collecting box to move outwards from the shell so as to more conveniently clean waste scraps, adjust the height of the polishing block and polish workpieces more conveniently by people with different heights, can improve the speed of polishing to the work piece, can utilize simultaneously to collect the box can be more convenient clear up the sweeps to can guarantee the effect of polishing to the work piece.

(2) The polishing device with the vertically movable polishing block is provided with the sliding block, the sliding rod and the limiting block, the supporting plate can be more stably moved up and down by the aid of the sliding block, the sliding rod can support the sliding sleeve, so that the collecting box can be better supported, the collecting box can be moved more conveniently, the limiting block can prevent the supporting plate from being separated from the threaded cylinder when the supporting plate moves downwards, and the polishing device is compact in structure, reasonable in design and high in practicability.

Drawings

FIG. 1 is a schematic cross-sectional view of the front view of the present invention;

FIG. 2 is a schematic sectional view of the chute of the present invention.

In the figure: the device comprises a shell 1, a first motor 2, a first gear 3, a second gear 4, a threaded barrel 5, a first bearing 6, a first fixed block 7, a threaded column 8, a support plate 9, a sliding block 10, a sliding chute 11, a second fixed block 12, a second motor 13, a first rotating shaft 14, a second bearing 15, a driving wheel 16, a belt 17, a driven wheel 18, a second rotating shaft 19, a third bearing 20, a polishing block 21, a placing plate 22, a through hole 23, a telescopic device 24, a telescopic rod 241, a spring 242, a supporting block 25, a supporting rod 26, a third motor 27, a cam 28, a collecting box 29, a third fixed block 30, a sliding sleeve 31, a sliding rod 32, a connecting block 33, a roller 34, a material taking port 35, a baffle 36, a supporting leg 37, a limiting block 38, a storage battery 39 and a control panel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-2, the present invention provides a technical solution: a grinding device with a grinding block capable of vertically moving comprises a shell 1, wherein the upper surface of the inner wall of the shell 1 is fixedly connected with a machine body of a first motor 2, the surface of an output shaft of the first motor 2 is fixedly connected with a first gear 3, the output shaft of the first motor 2 can enable a second gear 4 to rotate through the first gear 3 by arranging the first motor 2, so that the second gear 4 can drive a threaded cylinder 5 to rotate, the first gear 3 is meshed with the second gear 4, the second gear 4 is fixedly connected with the surface of a threaded cylinder 5, a first bearing 6 is fixedly connected to the position, above the second gear 4, of the surface of the threaded cylinder 5, a first bearing 6 is arranged, the threaded cylinder 5 can be fixed, the threaded cylinder 5 can be conveniently rotated, two side faces of the first bearing 6 are fixedly connected with the upper surface of the inner wall of the shell 1 through two first fixing blocks 7, the threaded cylinder 5 is internally threaded with a threaded column 8, the threaded cylinder 5 and the threaded column 8 are arranged, when the threaded cylinder 5 rotates, the threaded column 8 can move in the threaded cylinder 5, the rotating direction of the output shaft of the first motor 2 is controlled, the rotating direction of the threaded cylinder 5 can be controlled, so that the up-and-down movement of the threaded column 8 can be controlled, the bottom end of the threaded column 8 is fixedly connected with the upper surface of the supporting plate 9, two side surfaces of the supporting plate 9 are fixedly connected with opposite surfaces of two sliding blocks 10, the second motor 13 and the grinding block 21 can be supported by arranging the supporting plate 9, meanwhile, the supporting plate 9 can be driven to move up and down when the threaded column 8 moves up and down, so that the height of the grinding block 21 can be adjusted, the two sliding blocks 10 are respectively connected in two sliding grooves 11 formed in two side surfaces of the inner wall of the shell 1, and the, the chute 11 is T-shaped, the supporting block 25 can be fixed by arranging the sliding block 10 and the chute 11, the supporting plate 9 can move up and down more conveniently, the upper surface of the supporting plate 9 is fixedly connected with the machine body of the second motor 13 through the two second fixing blocks 12, the output shaft of the second motor 13 is fixedly connected with the top end of the first rotating shaft 14, the output shaft of the second motor 13 can enable the driving wheel 16 to rotate through the first rotating shaft 14 by arranging the second motor 13, the surface of the first rotating shaft 14 is sleeved with the second bearing 15, the second bearing 15 is clamped on the upper surface of the supporting plate 9, the second bearing 15 is positioned on the left side of the threaded column 8, the surface of the first rotating shaft 14 is fixedly connected with the driving wheel 16, the driving wheel 16 is in transmission connection with the driven wheel 18 through a belt 17, the driven wheel 18 is fixedly connected on the surface of the second rotating shaft 19, through arranging the, can drive when action wheel 16 through belt 17 and rotate from driving wheel 18, can make sanding block 21 rotate from driving wheel 18 through second pivot 19, third bearing 20 has been cup jointed on the surface of second pivot 19, the lower surface at backup pad 9 of third bearing 20 joint, the bottom of pivot and sanding block 21's last fixed surface are connected, through setting up sanding block 21, can be better when second pivot 19 drives sanding block 21 and rotates polish the work piece.

The placing plate 22 is arranged in the shell 1, the workpiece can be placed by arranging the placing plate 22, a worker can polish the workpiece more conveniently, the left side surface and the right side surface of the inner wall of the shell 1 are both provided with the limiting blocks 38, the two limiting blocks 38 are both positioned between the supporting plate 9 and the placing plate 22, the threaded column 8 can be prevented from being separated from the threaded cylinder 5 when the supporting plate 9 moves downwards by arranging the limiting blocks 38, the upper surface of the placing plate 22 is provided with a plurality of through holes 23, waste scraps on the placing plate 22 can be better dropped into the collecting box 29 by the through holes 23 by arranging the through holes 23, the lower surface of the placing plate 22 is fixedly connected with the upper surfaces of the two supporting blocks 25 through four expansion devices 24 respectively, the four expansion devices 24 are positioned at positions close to four corners of the lower surface of the placing plate 22 respectively, the expansion devices 24 comprise expansion rods 241 and springs 242, by providing the extension bar 241 and the spring 242, the extension bar 241 can fix the placing plate 22 and the spring 242, by using the elastic action of the spring 242, the placing plate 22 is raised to the highest position when the end of the cam 28 farthest from the output shaft of the third motor 27 contacts with the placing plate 22, the spring 242 is shortened to move the placing plate 22 downward when the end of the cam 28 farthest from the output shaft of the third motor 27 separates from the placing plate 22, the spring 242 is sleeved on the surface of the extension bar 241, the two ends of the extension bar 241 and the spring 242 are fixedly connected with the opposite surfaces of the placing plate 22 and the supporting block 25, respectively, the front surface of the inner wall of the housing 1 is fixedly connected with the end of the back surface of the supporting rod 26, the upper surface of the supporting rod 26 is fixedly connected with the body of the third motor 27, the cam 28 is fixedly connected with the surface of the output shaft of the third motor 27, and the cam 28 can intermittently contact with the placing plate 22, the placing plate 22 can be intermittently jacked upwards, the collecting box 29 is arranged in the shell 1, the lower surface of the collecting box 29 is provided with the material taking port 35, the position of the lower surface of the collecting box 29, which corresponds to the material taking port 35, is provided with the baffle 36, the material taking port 35 can be better sealed by the baffle 36, the collecting box 29 can be more conveniently collected by the material taking port 35, the lower surface of the collecting box 29 is respectively and fixedly connected with the upper surfaces of the two sliding sleeves 31 through the two third fixing blocks 30, the two sliding sleeves 31 are internally provided with the sliding rods 32, the two ends of the sliding rods 32 are respectively and fixedly connected with the opposite surfaces of the two connecting blocks 33, the sliding rods 32 and the sliding sleeves 31 are arranged, the sliding rods 32 can support the sliding sleeves 31, so that the collecting box 29 can be better supported, meanwhile, the collecting box 29 can be more conveniently moved, and the lower surfaces of the two connecting blocks 33 are both fixedly connected with the lower surface of the inner, the lower surface of the collecting box 29 is lapped with the upper surfaces of the two rollers 34, the lower surfaces of the two rollers 34 are fixedly connected with the lower surface of the inner wall of the shell 1, the two rollers 34 are symmetrically arranged at the left side and the right side of the two slide bars 32, the two rollers 34 are positioned at the positions, close to the front surface of the shell 1, of the lower surface of the inner wall of the shell 1, the friction force between the sliding sleeve 31 and the slide bars 32 can be reduced by arranging the rollers 34, the collecting box 29 can be moved more conveniently, the lower surface of the shell 1 is provided with four supporting legs 37, the number of the supporting legs 37 is four, the four supporting legs 37 are respectively positioned at the positions, close to four corners, of the lower surface of the shell 1, the shell 1 can be supported by arranging the supporting legs 37, workpieces can be polished more conveniently, the upper surface of the inner wall of the shell 1 is provided with a storage battery 39, through setting up battery 39, the messenger first motor 2 that can be more convenient, second motor 13 and third motor 27 power consumption work, control panel 40's input is connected with battery 39's output electricity, control panel 40's output respectively with first motor 2, second motor 13 and third motor 27's input electricity is connected, through setting up control panel 40, the first motor 2 of control that can be better, the work of second motor 13 and third motor 27, can be more convenient highly adjust the piece 21 of polishing, simultaneously can be more convenient clear up the sweeps on placing board 22.

The working principle is as follows: when the height of the grinding block 21 needs to be adjusted, the control panel 40 controls the first motor 2 to work, so that the output shaft of the first motor 2 drives the second gear 4 to rotate in the positive direction through the first gear 3, the threaded cylinder 5 rotates in the first bearing 6, the threaded column 8 can move downwards in the threaded cylinder 5, the output shaft of the first motor 2 is controlled to rotate in the reverse direction, the threaded column 8 can be controlled to move upwards in the threaded cylinder 5, the first motor 2 is controlled to stop working through the control panel 40 after the height adjustment of the grinding block 21 is finished, the control panel 40 controls the second motor 13 to work when a workpiece needs to be ground, the output shaft of the second motor 13 drives the driving wheel 16 to rotate through the first rotating shaft 14, the driving wheel 16 can make the driven wheel 18 rotate through the belt 17, and the driven wheel 18 can drive the grinding block 21 to rotate through the second rotating shaft 19, when the work piece is polished, the second motor 13 is controlled to stop working through the control panel 40, when the waste scraps on the placing plate 22 need to be cleaned, the third motor 27 is controlled to work through the control panel 40, the output shaft of the third motor 27 drives the cam 28 to rotate, the placing plate 22 can be gradually jacked upwards when the end, farthest from the output shaft of the third motor 27, of the cam 28 is in contact with the placing plate 22, so that the placing plate 22 can drive the telescopic device 24 to extend, when the end, farthest from the output shaft of the third motor 27, of the cam 28 is gradually separated from the placing plate 22, the telescopic device 24 is shortened to drive the placing plate 22 to move downwards, so that the placing plate 22 can vibrate upwards and downwards through the intermittent contact between one end of the cam 28 and the placing plate 22, the waste scraps on the placing plate 22 can fall into the collecting box 29 through the through hole 23, and the third motor 27 is controlled to stop working through the control panel 40 after the placing plate 22 is cleaned, when the waste in the collection box 29 needs to be collected, the collection box 29 is pulled to enable the third fixing block 30 to drive the sliding sleeve 31 to slide forwards on the surface of the sliding rod 32, the collection box 29 stops being pulled to a certain extent, then the baffle 36 can be opened to enable the waste in the collection box 29 to leak out from the material taking port 35, and after the collection box 29 is cleaned, the baffle 36 is closed and the collection box 29 is pushed to enable the collection box 29 to move inwards to the shell 1.

In conclusion, the grinding device with the vertically movable grinding block has the advantages that the working of the first motor 2 is controlled through the first motor 2, the threaded cylinder 5, the threaded column 8, the second motor 13, the grinding block 21, the placing plate 22, the telescopic device 24, the third motor 27, the cam 28 and the collecting box 29, so that the threaded cylinder 5 rotates, the threaded column 8 can move in the threaded cylinder 5, the rotating direction of the output shaft of the first motor 2 is controlled, the up-and-down movement of the threaded column 8 can be controlled, the grinding block 21 can rotate through the output shaft of the second motor 13, the cam 28 can be intermittently contacted with the placing plate 22 when the third motor 27 works, the placing plate 22 can be better vibrated through being matched with the telescopic device 24, meanwhile, the collecting box 29 can move outwards from the inside of the shell 1, waste scraps can be more conveniently cleaned, and the height of the grinding block 21 can be adjusted, therefore, people with different heights can polish workpieces more conveniently, the polishing speed of the workpieces can be improved, meanwhile, the collection box 29 can be utilized to clean scraps more conveniently, and the polishing effect of the workpieces can be guaranteed.

Meanwhile, the polishing device with the vertically movable polishing block is provided with the sliding block 10, the sliding rod 32 and the limiting block 38, the supporting plate 9 can be more stably moved up and down by the aid of the sliding block 10, the sliding rod 32 can support the sliding sleeve 31, so that the collecting box 29 can be better supported, the collecting box 29 can be moved more conveniently, the limiting block 38 can prevent the threaded column 8 from being separated from the threaded cylinder 5 when the supporting plate 9 moves downwards, and the polishing device is compact in structure, reasonable in design and high in practicability.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A sanding device with sanding blocks capable of moving vertically, comprising a housing (1), characterized in that: the upper surface of the inner wall of the shell (1) is fixedly connected with the machine body of the first motor (2), the surface of the output shaft of the first motor (2) is fixedly connected with a first gear (3), the first gear (3) is meshed with a second gear (4), the second gear (4) is fixedly connected with the surface of a threaded cylinder (5), the surface of the threaded cylinder (5) is fixedly connected with a first bearing (6) at a position above the second gear (4), two side surfaces of the first bearing (6) are fixedly connected with the upper surface of the inner wall of the shell (1) through two first fixed blocks (7), a threaded column (8) is connected with the inner thread of the threaded cylinder (5), the bottom end of the threaded column (8) is fixedly connected with the upper surface of a support plate (9), two side surfaces of the support plate (9) are fixedly connected with the opposite surfaces of two sliders (10), the two sliding blocks (10) are respectively connected in two sliding grooves (11) formed in two side faces of the inner wall of the shell (1) in a sliding mode, the upper surface of the supporting plate (9) is fixedly connected with a machine body of a second motor (13) through two second fixing blocks (12), an output shaft of the second motor (13) is fixedly connected with the top end of a first rotating shaft (14), a second bearing (15) is sleeved on the surface of the first rotating shaft (14), the second bearing (15) is connected to the upper surface of the supporting plate (9) in a clamping mode, the second bearing (15) is located on the left side of the threaded column (8), a driving wheel (16) is fixedly connected to the surface of the first rotating shaft (14), the driving wheel (16) is in transmission connection with a driven wheel (18) through a belt (17), the driven wheel (18) is fixedly connected to the surface of a second rotating shaft (19), and a third bearing (20) is sleeved on the surface of the second rotating shaft (, the third bearing (20) is clamped on the lower surface of the supporting plate (9), and the bottom end of the rotating shaft is fixedly connected with the upper surface of the polishing block (21);

a placing plate (22) is arranged in the shell (1), a plurality of through holes (23) are formed in the upper surface of the placing plate (22), the lower surface of the placing plate (22) is fixedly connected with the upper surfaces of the two supporting blocks (25) through four telescopic devices (24), the four telescopic devices (24) are respectively located at the positions, close to four corners, of the lower surface of the placing plate (22), the telescopic devices (24) comprise telescopic rods (241) and springs (242), the springs (242) are sleeved on the surface of the telescopic rods (241), and two ends of the telescopic rods (241) and two ends of the springs (242) are fixedly connected with opposite surfaces of the placing plate (22) and the supporting blocks (25) respectively;

The front of the inner wall of the shell (1) is fixedly connected with one end of the back of the supporting rod (26), the upper surface of the supporting rod (26) is fixedly connected with the machine body of the third motor (27), the surface of the output shaft of the third motor (27) is fixedly connected with the cam (28), the shell (1) is internally provided with a collecting box (29), the lower surface of the collecting box (29) is respectively fixedly connected with the upper surfaces of the two sliding sleeves (31) through the two third fixing blocks (30) and is internally provided with a sliding rod (32), the two ends of the sliding rod (32) are respectively fixedly connected with the opposite surfaces of the two connecting blocks (33), the lower surfaces of the two connecting blocks (33) are respectively fixedly connected with the lower surface of the inner wall of the shell (1), the lower surface of the collecting box (29) is overlapped with the upper surfaces of the two rollers (34), and the lower surfaces of the two rollers (34) are respectively fixedly connected with the lower surface of the inner wall, the two rollers (34) are symmetrically arranged at the left side and the right side of the two sliding rods (32), and the two rollers (34) are both positioned at the positions, close to the front of the shell (1), of the lower surface of the inner wall of the shell (1);

a storage battery (39) is arranged on the upper surface of the inner wall of the shell (1), and the storage battery (39) is positioned on the right side of the first motor (2); a control panel (40) is arranged on the left side face of the shell (1), the input end of the control panel (40) is electrically connected with the output end of the storage battery (39), and the output end of the control panel (40) is electrically connected with the input ends of the first motor (2), the second motor (13) and the third motor (27) respectively; a material taking port (35) is formed in the lower surface of the collecting box (29), and a baffle (36) is arranged on the lower surface of the collecting box (29) corresponding to the material taking port (35); the lower surface of the shell (1) is provided with four supporting legs (37), and the four supporting legs (37) are respectively positioned at the positions, close to four corners, of the lower surface of the shell (1); the left side face and the right side face of the inner wall of the shell (1) are provided with limiting blocks (38), the two limiting blocks (38) are located between the supporting plate (9) and the placing plate (22), and the sliding block (10) is T-shaped.

2. a sanding device as defined in claim 1 in which the sanding block is vertically movable, the device comprising: the sliding groove (11) is T-shaped.