CN212265370U - Automatic wall grinding device - Google Patents

Abstract

The utility model discloses an automatic grinding device of wall, including dolly, linear slip table module, sharp actuating mechanism, pulley, dust catcher, the head of polishing. The dolly upper end is connected with the linear slip table module that extends the vertical direction through support fixedly, is connected with the linear drive mechanism that the vertical direction set up on the slide of linear slip table module, and the head of polishing is through a plurality of connecting plate fixed connection on the slider, and the dust catcher is installed in the dolly upper end for absorb the dust of polishing the head and polishing the production. The automatic polishing device of the utility model can solve the control problem of polishing depth by arranging the movable plate, the adjusting bolt, the limiting boss and other structures, and ensure the polishing quality of the wall; through setting up sharp actuating mechanism and linear slip table module, can solve the problem of the altitude mixture control of polishing to adapt to some highly different walls, through setting up suction hood and dust catcher, can reduce operational environment's dust, a green's product believes and receives people's favor more easily.

Description

Automatic wall grinding device

Technical Field

The invention relates to the field of wall polishing, in particular to an automatic wall polishing device.

Background

Along with the development of real estate, more and more high buildings are built in cities, after the buildings are built, decoration projects are often accompanied, and wall polishing is a necessary process for house decoration.

In the prior art, the polishing of the wall is mostly manual or manual semi-automatic, the manual efficiency of the mode is low, the fatigue is easy, and meanwhile, the dust generated in the polishing process causes damage to the human body.

In view of this, it is very important to design and manufacture an automatic wall polishing device which has high polishing efficiency, can avoid damage to human body, and is convenient to operate.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. In order to overcome the defects of the prior art, the invention aims to provide an automatic wall polishing device to meet the requirements of automatic wall polishing at different heights and different polishing depths.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the invention provides an automatic wall polishing device, which comprises: the polishing head is connected with a first stepping motor through a rigid coupling; the moving plate is connected with the first stepping motor, and a plurality of guide holes are formed in the end face of the moving plate; the main board comprises a guide post matched with the guide hole and a spring arranged on the guide post, wherein the main board is axially and movably connected with the movable board through an adjusting bolt and an adjusting nut, the spring pushes the movable board to move on the main board, and the adjusting nut can control the maximum moving distance of the movable board; the linear driving mechanism extends along the vertical direction, and the main board is fixedly connected with a sliding block on the linear driving mechanism; the linear sliding table module extends along the vertical direction and comprises a sliding plate, and the linear driving mechanism is fixedly connected to the sliding plate; and the support is fixedly connected with the linear sliding table module, the support is fixed at the top of the trolley, and the trolley can drive the whole polishing device to move along the horizontal direction.

Further, the linear driving mechanism comprises a linear guide rail, a sliding block and a pulley block, and the linear guide rail is connected with the sliding plate through an intermediate plate.

Further, the assembly pulley includes reel, second step motor, first pulley, second pulley and two wire rope, and two wire rope's one end twine respectively in two wire casings of reel, a wire rope's one end around first pulley with the rings that the mainboard upper end set up are connected, another wire rope's one end around second pulley with the rings that the mainboard lower extreme set up are connected, and wherein, second step motor passes through the wire winding pole transmission with the reel and is connected.

Further, linear guide top is provided with the pulley roof, first pulley fixed connection is on the pulley roof, the second pulley is fixed to be set up at the dolly top, just the second pulley is provided with two, the reel passes through reel backup pad fixed connection at the support top, and second step motor passes through motor platform also fixed connection at the support top.

Furthermore, a scale plate parallel to the guide column is arranged on the main plate, and the scale plate records the moving distance of the moving plate on the main plate.

Furthermore, the scale plate is provided with a guide groove, the lower end of the movable plate is connected with a guide wheel, and the guide wheel is matched with the guide groove.

Furthermore, the first stepping motor is connected with the moving plate through an extension plate, so that the polishing head protrudes out of the side edge of the trolley for a certain distance.

Furthermore, a limiting boss parallel to the guide post is arranged on the main board, and the length of the limiting boss is smaller than that of the guide post.

Furthermore, the trolley comprises a trolley bottom plate, a control panel and universal wheels, wherein two direct current speed reduction motors are connected in the middle of the trolley bottom plate, each direct current speed reduction motor is connected with a driving wheel through a key, the swing rod connecting piece is fixed on the trolley bottom plate through a connecting piece, and the direct current speed reduction motors are fixed on the swing rod connecting piece through connecting pieces.

Furthermore, a dust hood is arranged on the back of the polishing head and connected with a dust collector fixed at the top of the trolley through an air pipe.

Compared with the prior art, the invention has the beneficial effects that:

1. the automatic polishing device can solve the problem of controlling the polishing depth by arranging the movable plate, the adjusting bolt, the limiting boss and other structures, and ensures the wall polishing quality; through setting up sharp actuating mechanism and linear slip table module, can solve the problem of the altitude mixture control of polishing to adapt to some highly different walls, drive the head of polishing through setting up step motor and incessantly rotate, can improve device's the efficiency of polishing, make the device realize the automation, through setting up suction hood and dust catcher, can reduce operational environment's dust, a green's product believes more easily receives people's favor.

2. According to the automatic polishing device, the linear sliding table module is arranged, so that the linear guide rail and the sliding block can be lifted, the polished surface can be lifted to the top of the wall, and the polished surface can be lowered to a position below the height of the entrance door, and the device can conveniently go in and out of each room; through the positive and negative rotation and the assembly pulley structure of step motor, pulling slider is up-and-down reciprocating motion on linear guide, then the slider is connected with the head of polishing again, realizes polishing through the rotation of the head of polishing, polishes in addition the linear motion of slider on the guide rail, and the height of polishing is guaranteed by linear guide's height and linear slip table module itself.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic top view of an automatic wall grinding apparatus according to the present invention;

fig. 2 is a schematic front view of the automatic wall grinding device according to the present invention;

FIG. 3 is a schematic side view of the automatic wall grinding device of the present invention;

FIG. 4 is a schematic view of the structure of the cart in the automatic wall grinding apparatus of the present invention;

FIG. 5 is a schematic structural view of a portion of the components at the location of the sanding head in the automatic wall sanding device of the present invention; and

fig. 6 is a schematic structural view of a part of a component at the position of a winding wheel in the automatic wall grinding device according to the present invention.

Description of the reference numerals

1. Polishing head; 2. a dust hood; 3. a rigid coupling; 4. a first stepper motor; 5. an extension plate; 6. adjusting the bolt; 7. adjusting the nut; 8. a spring; 9. a second stepping motor; 11. A wire winding rod; 12. a hoisting ring; 13. a limiting boss; 14. a guide groove; 15. a guide post; 16. A scale plate; 18. a corner connector; 19. a universal wheel; 21. a rear side plate of the trolley; 22. moving the plate; 23. a guide wheel; 30. a second pulley; 31. a servo motor; 33. a linear guide rail; 35. A wire rope; 36. a main board; 41. a motor table; 43. a reel; 44. a deep groove ball bearing; 45. A reel support plate; 46. an air tube; 47. a vacuum cleaner; 49. a trolley side plate; 50. a control panel; 51. a front side plate of the trolley; 52. a pulley top plate; 53. a linear sliding table module; 54. a first pulley; 55. a middle plate; 56. a slider; 57. a support; 60. a DC gear motor; 61. A swing rod connecting piece; 63. a driving wheel; 64. a key.

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.

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Fig. 1-6 illustrate some embodiments according to the invention.

As shown in fig. 1 to 3, an automatic wall grinding apparatus includes: the trolley, the linear sliding table module 53, the linear driving mechanism, the pulley, the dust collector 47 and the polishing head 1. The base that the dolly was whole device can the back-and-forth movement, and the dolly upper end is connected with the linear slip table module 53 that extends through support 57 fixedly, is connected with the linear actuating mechanism that the vertical direction set up on the slide of linear slip table module 53, and the head of polishing 1 is through a plurality of connecting plate fixed connection on slider 56, and dust catcher 47 is installed in the dolly upper end for absorb the dust of polishing the production of polishing the head of polishing.

Specifically, the dolly includes dolly front side board 51, dolly rear side board 21, dolly lateral plate 49, the dolly roof, the dolly bottom plate, and control panel 50, connect fixedly through angle sign indicating number connecting piece 18 between each board, and the screw hole of coupling part is M8, wherein, be equipped with the rectangle draw-in groove on dolly front side board 51, the dolly rear side board 21, be used for adorning universal wheel 19, connect the wheel through the universal wheel support, form four-wheel arrangement structure, wherein, for using three universal wheel 19, four universal wheel 19's design stability is higher, the load capacity is also stronger.

Wherein, two direct current gear motors 60 are connected in the middle of the trolley bottom plate, each direct current gear motor 60 is connected with a driving wheel 63 through a key 64, the swing rod connecting piece 61 is fixed on the trolley bottom plate through a connecting piece, the direct current gear motors 60 are fixed on the swing rod connecting piece 61 through a connecting piece, torque is transmitted by the keys 64, and the two direct current gear motors 60 are independently driven, so that the rotating speeds of the two driving wheels 63 of the trolley can be different, so that the trolley can be deflected or rotated to one side, by means of which effect the trolley can be made to follow a straight line, because the polishing head 1 is always moved against the wall during polishing, and then the motor on the side close to the wall is rotated at a slower speed than the side far from the wall, therefore, the trolley can always walk along the wall, and the problem of the walking route of the trolley is well solved.

The swing rod connecting piece 61 is fixed on the bottom plate of the trolley through a connecting piece, and the direct-current speed reduction motor 60 is fixed on the swing rod connecting piece 61 through a connecting piece.

Wherein the grinding head 1 exerts a large force on the wall during the grinding process of the device, so that the trolley is very difficult to move at the beginning, and therefore a plane is cut on both driving wheels 63, so that although there is a small period of non-contact surface when rolling, the section is not large, and the existence of the section only affects the moving speed of the trolley and does not affect the balance of the trolley. Therefore, it is necessary that the section exists, and each time the sanding is finished, the section of the driving wheel can be returned to the lowest position under the manual control of the switch on the control panel 50.

Specifically, there is support 57 at the dolly top through the bolt fastening, fixedly connected with prolongs the linear slip table module 53 that vertical direction extends on the support 57, is connected with a servo motor 31 on the linear slip table module 53, rotates through servo motor 31 drive screw, and then drives the slider and move back and forth from top to bottom, the slide passes through the linear guide 33 of two vertical settings of intermediate lamella 55 fixed connection, the last polylith slider 56 that is connected with of linear guide, wherein, linear guide 33 top is connected with pulley roof 52.

In consideration of adapting to wall surfaces with different heights, the linear sliding table module 53 is selected, and the polishing height can be well improved through the linear sliding table module 53. As to why two sets, or more, are not selected to replace the rear track structure. That is because the linear slide module is big in quality itself, and the price is also higher than it to the guide rail, and one more set not only can the cost improve, also can grow to the requirement of connecting piece moreover, so be unsuitable more than one set.

The linear sliding table module 53 selected by the invention is of a type KUH1520L-640- & lt 100 & gt, and compared with the type KUH2020L-840- & lt 150 & gt, the height of the selected linear sliding table module is low, but the mass is greatly reduced, the whole structure for reducing the mass is safer, and the action can be more flexible. According to the model, the total length of linear slip table module is 640mm, and the effective stroke is 430 mm. The design of the intermediate plate 55 is such that it is desirable to lower the starting position of the sanding as much as possible in order to increase the sanding range.

The linear guide rails 33 are MGN15 series, the length of 1650mm is selected in consideration that the wall surface of home decoration is not too high, and in order to increase stability and strength, two sliding blocks 56 are arranged on each linear guide rail, and the total number of the sliding blocks is four. The height of the sliding blocks on each linear guide rail 33 is the same, and the screw holes on the sliding blocks 56 are all M4 through holes for fixing the main board 36.

As shown in fig. 3 and 5, specifically, a main plate 36 is fixedly connected to the sliding block 56, the main plate 36 is used for connecting a polishing device, wherein two limiting bosses 13, four guide posts 15 and a scale plate 16 are further arranged at the upper front end of the main plate 36, scales are engraved on the scale plate 16, two guide grooves 14 are machined on two sides of the scale plate 16, a spring 8 is mounted on each guide post 15, and an adjusting bolt mounting hole is further formed in the main plate 36. The front side of the main plate 36 is provided with a moving plate 22 extending in a vertical direction, and the moving plate 22 is provided with four guide holes and adjusting bolt connecting holes.

The four guide holes in the movable plate 22 are respectively matched with the guide columns 15 in the main plate 36, the adjusting bolts 6 are arranged in the adjusting bolt mounting holes and the adjusting bolt connecting holes, the adjusting bolts 6 are fixedly provided with the adjusting nuts 7, the adjusting nuts 7 are arranged on the adjusting bolts 6, and the movable plate 22 can move back and forth on the main plate 36 by rotating the adjusting nuts 7, so that the distance from the movable plate 22 to the main plate 36 is adjusted, and the polishing of the polishing head 1 and the polishing depth of the polishing head are controlled.

The length of the limiting boss 13 is smaller than that of the guide column 15, and is a starting point of the moving plate 22, and according to the starting point, the moving plate 22 can be marked with scales on the scale plate 16 to mark the grinding depth. In order to make the moving plate 22 move more smoothly, a guide wheel 23 is arranged at the bottom of the moving plate 22, and the guide wheel 23 is matched with a guide groove on the scale plate 16 to play a guiding role.

Wherein, the upper end, the lower extreme of mainboard 36 are provided with a rings 12 respectively, and two rings 12 all have certain distance with the central symmetry plane of mainboard 36. The purpose is to ensure that the two ropes 35 tied to the bail 12 do not lie in the same plane, so that the ropes 35 can be wound around the same reel 43 (hereinafter referred to as a pulley block) without interfering with each other. The middle part of the main board 36 is provided with a connecting hole with the diameter of phi 10mm, which is used for placing the adjusting bolt 6, and the grinding depth is determined and controlled through the matching of the adjusting bolt 6 and the moving plate 22.

Specifically, the front end of the movable plate 22 is connected with two extension plates 5 through an angle connector, a first step motor 4 is connected to the front end of the extension plate 5 through a fixed support, and the first step motor 4 is connected with a polishing head 1 through a rigid coupler 3, wherein the first step motor 4 drives the polishing head 1 to rotate ceaselessly to polish the wall.

Wherein, the significance that extension plate 5 exists is, considers that the head of polishing 1 need paste the wall and move, but the dolly can not necessarily paste the wall motion, so need the extension for when dolly and wall keep the certain distance, the head of polishing can reach the wall, thereby polishes.

Specifically, the rear end side of the polishing head 1 is connected with a dust hood 2, the dust hood 2 is used for solving dust generated during polishing, and the whole polishing head is made of plastic. Consists of a disc and two pipelines. The duct is the inlet for dust to enter. The duct is connected to an air hose 46 through which dust is drawn into the cleaner by the negative pressure generated by the cleaner 47.

Specifically, the automatic wall polishing device further comprises a pulley block, wherein the pulley block comprises two pulleys mounted at the top of the trolley, a winding wheel mechanism mounted at the top of the bracket 57, a second pulley 30 fixed on a pulley top plate 52 and a steel wire rope 35. The reel mechanism comprises a reel 43 and a second stepping motor 9 for driving the reel to rotate, wherein the reel 43 is connected with a bracket 57 through a reel supporting plate 45, the second stepping motor 9 is fixedly connected to the top of the bracket 57 through a motor platform 41, and the reel 43 is connected with the reel supporting plate 45 through a deep groove ball bearing 44.

Wherein, the reel 43 is provided with two grooves, the reel supporting plate 45 is provided with a through hole, one end of a steel wire rope is wound on the reel 43, and the other end of the steel wire rope passes through a first pulley 54 on a pulley top plate 52 and is connected with a hanging ring 12 at the upper end of the main plate 36; one end of another wire rope is also wound on the reel 43, and the other end of the other wire rope passes through the through holes on the reel supporting plate 45, sequentially bypasses the two second pulleys 30 arranged on the top of the trolley and is finally connected with the hanging ring 12 at the lower end of the main plate 36.

Wherein, the assembly pulley is the power source of grinding machanism, and through second step motor 9 drive the corotation of reel 43 and reverse rotation and three pulley combine together for two wire rope do opposite motion simultaneously, and one tightens up, the straight reciprocating motion of an increase.

The reel 43 is provided with two grooves designed to wind two wire ropes without the two ropes interfering with each other. The same steering of the reel is realized by different winding modes, but the motion states of the steel wire rope are different. The reel 43 is connected to a rigid coupling by the winding rod 11, and is connected to the second stepping motor 9 through the rigid coupling. Although rigid couplings are not suitable for use in high speed activities, the speed of wall sanding is not rapid, and therefore they have the characteristics of light weight, ultra-low inertia, and high sensitivity to meet the connection requirements herein.

Wherein, the pulley is a V-shaped 1.2 inch rail wheel made of 304 stainless steel. The whole weight of the grinding body is not very heavy, and the bearing weight of the 1.2-inch V-shaped 100Kg can completely meet the use requirement. The model with larger size and higher strength does not need to be selected.

The second stepper motor 9 is selected because of the need to control the forward and reverse rotation of the reel back and forth. Although the stepping motor has the disadvantage of being incapable of providing a large torque and a high rotation speed, the stepping motor is a reasonable choice because the high rotation speed is not required for wall grinding and because the weight of the grinding body is not heavy for wall grinding.

The working principle and the working process of the automatic wall grinding device are as follows:

and S1, firstly setting the initial position reading of the moving plate on the main plate to be 0, and then screwing out the adjusting nut 7 on the adjusting bolt 6 connecting the main plate 36 and the moving plate 22 until the scale is the grinding depth.

S2, turning on a control power supply of the trolley, rotating the driving wheel 63 to the position where the plane is at the lowest position, and moving the trolley to the front of the wall to enable the sanding head 1 to be parallel to and tightly attached to the wall. So that the moving plate 22 again reads 0 on the main plate 36.

S3, start the control system and the cleaner 47. At this time, the second stepping motor 9 starts to rotate in a certain direction at a certain rotating speed, the second stepping motor 9 drives the reel 43 to rotate, the reel 43 pulls the steel wire rope 35, the steel wire rope 35 is connected with the main plate 36, and the main plate 36 drives the sanding head 1 to move upwards or downwards along the vertical direction. Sanding begins because the sanding head rubs against the wall under the action of the spring 8. When the polishing head 1 moves upwards or downwards along the vertical direction, the travel switch is triggered, the second stepping motor 9 rotates towards the other direction, the moving direction of the polishing head 1 is changed at the moment, and polishing continues. In this way, the moving plate 22 will move forward and stop at the position of the nut, and the polishing depth is fixed. At this time, the control system is notified by the sensor, and the servo motor 31 on the linear slide table module starts to move.

S4, the servo motor 31 starts to move, the linear guide rail 33, the sliding block 56 and the polishing head 1 integrally start to ascend, and when the height rises and is about to touch the top of the wall, the control system controls the servo motor 31 to stop rotating. The second stepping motor 9 does not need to be stopped during this process, and the normal operation is always maintained. When the moving plate 22 is stopped again at the nut position, the dc gear motor 60 on the cart drives the driving wheel 63 to rotate, thereby driving the cart and the whole device to move along the wall.

S5, the cart will move forward a distance of the length of the diameter of the sanding head 1. Then, the polishing is continued, and when the moving plate 22 stops at the nut position again, the control system controls the servo motor 31 to move reversely, so that the overall height of the polishing head 1 is reduced to the minimum value again, and the polishing head 1 travels on the wall in an S-shaped path.

And S6, circulating to and fro, enabling the trolley to continuously advance, detecting whether an obstacle exists in front through the ultrasonic sensor, and informing the control system to cut off the advance of the trolley by the ultrasonic sensor before the trolley collides with the obstacle in front to finish polishing.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (10)

1. An automatic grinding device of wall which characterized in that includes:

the polishing head (1) is connected with a first stepping motor (4) through a rigid coupling (3);

the moving plate (22) is connected with the first stepping motor (4), and a plurality of guide holes are formed in the end face of the moving plate; the main plate (36) comprises a guide post (15) matched with the guide hole and a spring (8) arranged on the guide post (15), wherein the main plate (36) is axially and movably connected with the moving plate (22) through an adjusting bolt (6) and an adjusting nut (7), the spring (8) pushes the moving plate (22) to move on the main plate (36), and the adjusting nut (7) can control the maximum moving distance of the moving plate (22);

the linear driving mechanism extends along the vertical direction, and the main plate (36) is fixedly connected with a sliding block (56) on the linear driving mechanism;

the linear sliding table module (53) extends along the vertical direction and comprises a sliding plate, and the linear driving mechanism is fixedly connected to the sliding plate; and

support (57), and linear slip table module (53) fixed connection, support (57) are fixed at the dolly top, and the dolly can drive whole grinding device and remove along the horizontal direction.

2. An automatic wall grinding device according to claim 1, characterized in that the linear drive mechanism comprises a linear guide (33), a slide (56), and a pulley block, the linear guide (33) being connected to the slide by an intermediate plate (55).

3. The automatic wall grinding device according to claim 2, wherein the pulley block comprises a reel (43), a second stepping motor (9), a first pulley (54), a second pulley (30) and two steel wire ropes (35), one ends of the two steel wire ropes are wound in two wire grooves of the reel (43), one end of one steel wire rope is connected with a hanging ring (12) arranged at the upper end of the main plate (36) by bypassing the first pulley (54), one end of the other steel wire rope is connected with the hanging ring (12) arranged at the lower end of the main plate (36) by bypassing the second pulley (30), and the second stepping motor (9) is in transmission connection with the reel (43) through a winding rod (11).

4. The automatic wall grinding device according to claim 3, wherein a pulley top plate (52) is arranged on the top of the linear guide rail (33), the first pulley (54) is fixedly connected to the pulley top plate (52), the second pulley (30) is fixedly arranged on the top of the trolley, two pulleys (30) are arranged, the reel (43) is fixedly connected to the top of the bracket (57) through a reel supporting plate (45), and the second stepping motor (9) is also fixedly connected to the top of the bracket (57) through a motor table (41).

5. An automatic wall grinding device according to claim 1, characterized in that the main plate (36) is provided with a scale plate (16) parallel to the guide post (15), the scale plate (16) recording the distance of movement of the moving plate (22) on the main plate (36).

6. An automatic wall grinding device according to claim 5, characterized in that the scale plate (16) is provided with a guide groove (14), a guide wheel (23) is connected to the lower end of the moving plate (22), and the guide wheel (23) is matched with the guide groove (14).

7. An automatic wall grinding device according to claim 1, characterized in that the first stepping motor (4) is connected with the moving plate (22) through an extension plate (5) so that the grinding head (1) protrudes a certain distance from the side of the trolley.

8. The automatic wall grinding device according to claim 1, wherein the main plate (36) is provided with a limiting boss (13) parallel to the guide post (15), and the length of the limiting boss (13) is smaller than that of the guide post (15).

9. The automatic wall grinding device according to claim 1, wherein the trolley comprises a trolley bottom plate, a control panel (50) and universal wheels (19), two direct current speed reducing motors (60) are connected to the middle of the trolley bottom plate, each direct current speed reducing motor (60) is connected with a driving wheel (63) through a key (64), the swing rod connecting piece (61) is fixed on the trolley bottom plate through a connecting piece, and the direct current speed reducing motors (60) are fixed on the swing rod connecting piece (61) through connecting pieces.

10. An automatic wall grinding device according to claim 1, characterized in that the back of the grinding head (1) is provided with a dust hood (2), and the dust hood (2) is connected with a dust collector (47) fixed on the top of the trolley through an air pipe (46).

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