CN113787397B

CN113787397B - Building wall roughening equipment

Info

Publication number: CN113787397B
Application number: CN202111357712.5A
Authority: CN
Inventors: 何斌; 宿国平
Original assignee: Shandong Junding Huizhi Scientific Innovation Co ltd
Current assignee: Shandong Junding Huizhi Scientific Innovation Co ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-01-18
Anticipated expiration: 2041-11-17
Also published as: CN113787397A

Abstract

The invention discloses building wall roughening equipment, and relates to the technical field of building construction equipment. The invention comprises two main boards, a plurality of sanding sheets, a dust-proof frame, a plurality of dust-pumping holes, a linkage gear, a first motor, an included angle sanding mechanism, two hinged plates, a limiting mechanism and a dust-absorbing mechanism, wherein the hinged plates are hinged, a hinged shaft is hinged between the two hinged plates, the two hinged plates are fixedly arranged on one side wall of the two main boards, the two main boards are hinged through the hinged plates, the two dust-proof frames are arranged in a U shape, the two dust-proof frames are respectively arranged at the bottoms of the two main boards, the adjacent sides of the two dust-proof frames are hinged, two ends of the two dust-proof frames are respectively provided with a telescopic rod structure, and the included angle sanding mechanisms are provided with two groups.

Description

Building wall roughening equipment

Technical Field

The invention relates to the technical field of building construction equipment, in particular to a building wall roughening device.

Background

At present workman is when carrying out the manual work of wall sanding, generally comes the operation of roughening to the wall with the fixed abrasive paper of abrasive paper frame for the wall has certain roughness, adhesive force when being convenient for spray paint, but, this kind of mode leads to needing artifical the sanding hard when roughening, and roughening efficiency is not high, and the dust is very serious moreover. Along with the continuous development of electric roughening tools, electric roughening is applied more and more.

The invention discloses a building wall roughening device with publication number CN110405598A, which relates to the field of building construction equipment, and the invention discloses a building wall roughening device, wherein an abrasive belt is used for roughening, so that the roughening area is large, the roughening flatness is improved, meanwhile, the structure size of a first abrasive belt roughening mechanism and the structure size of a second abrasive belt roughening mechanism are the same, the abrasive belt running direction of the first abrasive belt roughening mechanism is opposite to the abrasive belt running direction of the second abrasive belt roughening mechanism, and the running speeds are the same, so that the wrist bearing capacity of a user can be reduced, the roughening forces of the first abrasive belt roughening mechanism and the second abrasive belt roughening mechanism are just offset, the roughening balance is improved, and the roughening reliability is improved; and the extension of the sanding belt is adjustably set in order to adjust the sanding pressure.

However, the patent of the invention has the following problems: firstly, the included angle cannot be roughened in a comparison file, however, part of devices in the prior art can be used for roughening the included angle of the wall, but the roughening is inconvenient, 1, an adjacent wall forming an included angle with the roughened wall is easily damaged by carelessness when the included angle is roughened, 2, the operation difficulty of workers is high when the included angle is roughened, and 3, two walls cannot be roughened simultaneously when the included angle is roughened; second, when the transform angle is beaten the contained angle, the holistic roughness of wall when can influence the wall of beating a hair greatly to and influence the problem of the efficiency of beating a hair, the angle of device does not fix. The invention proposes a novel solution for this purpose.

Disclosure of Invention

The invention aims to provide a building wall roughening device to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a building wall roughening device comprises two main boards, a plurality of roughening sheets, a dust-proof frame, a plurality of dust-sucking holes, a linkage gear, a first motor, two included angle roughening mechanisms, hinged plates, a limiting mechanism and a dust suction mechanism, wherein the hinged plates are provided with a hinged shaft in a hinged mode, the hinged plates are fixedly arranged on one side wall of the two main boards, the two main boards are hinged through the hinged plates, the dust-proof frame is provided with two included angle roughening mechanisms, the two included angle roughening mechanisms are arranged above the two main boards respectively, the linkage gear is provided with two groups, and two sets of the linkage gears are respectively arranged on the upper surfaces of the two main boards, the first motor is provided with two, the output shaft of the first motor is fixedly connected above the linkage gears, the two main boards are respectively provided with a protection baffle plate, the dust extraction holes vertically penetrate through the two main boards and the corresponding protection baffle plates respectively, the two ends of the protection baffle plates are respectively provided with a chamfer, the two limiting mechanisms are arranged on one side wall of the two protection baffle plates, and the two dust extraction mechanisms are arranged above the protection baffle plates.

Furthermore, a plurality of dust extraction holes are formed in the upper side wall and the lower side wall of the inner wall of the dustproof frame and penetrate through the upper surface of the dustproof frame to correspond to the dust extraction holes in the bottom of the mainboard one by one.

Further, each group of linkage gears comprises a main gear and two auxiliary gears, and the two auxiliary gears are meshed with the main gear to rotate.

Further, contained angle mechanism of roughening includes two sheets of roughening, two second motors, two first electric putter, two slip tables and two guide rails, two the spout has still been seted up on the mainboard, two the guide rail sets up in the top of spout, two the slip table slides respectively and sets up on corresponding the guide rail, two all fixed second motor, two of being provided with on the slip table the output shaft of second motor all runs through corresponding spout, two the fixed a lateral wall that sets up at one of them guard flap of first electric putter, two first electric putter is fixed a lateral wall that sets up at two mainboards respectively, two the back of first electric putter's output shaft fixed connection slip table.

Further, stop gear includes limit gear, gag lever post, spacing rack and second electric putter, limit gear rotates and sets up the top at the articulated shaft, the one end fixed connection of gag lever post is at limit gear's upper surface, the other end of gag lever post is fixed to be set up on a lateral wall of guard flap, second electric putter is fixed to be set up on a lateral wall of guard flap, spacing rack sets up at second electric putter's output shaft tip, and spacing rack meshes with limit gear mutually.

Further, every group dust absorption mechanism includes dust absorption fan, suction box, dust absorption mouth, dust outlet and deposits the ash bin, the suction box sets up in guard flap's top, the position that the bottom of suction box corresponds a plurality of dust extraction holes is provided with the dust absorption mouth, the top at the suction box is seted up to the dust outlet, the dust absorption fan sets up in dust outlet department, it sets up the output at the dust absorption fan to deposit the ash bin.

Further, every it all slides and is equipped with the drawer to deposit ash bottom of the case, and one side of every ash storage case all is equipped with the handle.

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

1. can effectual solution at the problem that the contained angle between two walls can't be roughened through contained angle roughening mechanism to the contained angle of roughening in-process to the adaptation that also can be fine when the contained angle between some two walls of roughening is the acute angle, not only can roughen simultaneously to the two walls of contained angle, great improvement work efficiency, can also stretch out a piece of roughening alone according to actual demand and roughen the wall alone, the practicality is stronger, also can greatly reduced workman's the operation degree of difficulty, can appear a series of problems in avoiding subsequent work.

2. Utilize stop gear can effectually make the device when different angles of hacking, carry on spacingly to the device to holistic stationarity when keeping hacking need not artifical manually operation moreover, need not hack to half and take it down again and transfer, can adapt to multiple environment, strengthened the practicality of device, reduced staff's intensity of labour.

3. The condition that the dust suction mechanism of the whole device is paralyzed due to the blockage of a few dust suction holes is prevented, and the rationality of the device is improved.

Drawings

FIG. 1 is a schematic perspective front view of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is a schematic view of the overall three-dimensional back structure of the present invention;

FIG. 4 is a schematic view of a three-dimensional structure of the invention in which a limiting mechanism and an included angle roughening mechanism work in cooperation;

FIG. 5 is a schematic structural view of the included angle roughening mechanism of the present invention during operation;

FIG. 6 is a structural diagram of a first working state of the limiting mechanism of the present invention;

FIG. 7 is a structural diagram of the limiting mechanism of the present invention in a second operating state;

fig. 8 is a schematic perspective sectional view of the dust suction mechanism of the present invention.

In the figure: 1. a main board; 2. beating a wool sheet; 3. a dust-proof frame; 4. a handle; 5. a linkage gear; 51. a main gear; 52. a pinion gear; 6. a dust suction mechanism; 61. a dust collection fan; 62. a dust collection box; 63. a dust suction port; 64. an ash storage box; 7. an included angle roughening mechanism; 71. making burrs at an included angle; 72. a second motor; 73. a first electric push rod; 74. a sliding table; 75. a guide rail; 76. a chute; 8. a hinge plate; 9. a limiting mechanism; 91. a limit gear; 92. a limiting rod; 93. a limit rack; 94. a second electric push rod; 10. a first motor; 11. a dust extraction hole; 12. a drawer; 13. and a protective baffle.

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.

It should be noted that in the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Further, it will be appreciated that the dimensions of the various elements shown in the figures are not drawn to scale, for ease of description, and that the thickness or width of some layers may be exaggerated relative to other layers, for example.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined or illustrated in one figure, it will not need to be further discussed or illustrated in detail in the description of the following figure.

As shown in fig. 1 to 8, the present invention provides a technical solution: a building wall roughening device comprises two main boards 1 and a plurality of roughening sheets 2, and further comprises two dust-proof frames 3, a plurality of dust-pumping holes 11, a linkage gear 5, a first motor 10, an included angle roughening mechanism 7, hinged plates 8, a limiting mechanism 9 and a dust suction mechanism 6, wherein the number of the hinged plates 8 is two, a hinged shaft is hinged between the two hinged plates 8, the two hinged plates 8 are fixedly arranged on one side wall of the two main boards 1, the two main boards 1 are hinged through the hinged plates 8, the number of the dust-proof frames 3 is two, the dust-proof frames 3 are U-shaped, the two dust-proof frames 3 are respectively arranged at the bottoms of the two main boards 1, the adjacent sides of the two dust-proof frames 3 are hinged, two ends of the two dust-proof frames 3 are respectively provided with a telescopic rod structure, the included angle roughening mechanisms 7 are provided with two groups, and the included angle roughening mechanisms 7 are respectively arranged above the two main boards 1, the linkage gear 5 is provided with two sets, and two sets of the linkage gear 5 sets up respectively at two 1 upper surfaces of mainboard, first motor 10 is provided with two, two the output shaft fixed connection of first motor 10 is in the top of linkage gear 5, two the top of mainboard 1 still is provided with guard flap 13 respectively, and is a plurality of take out dirt hole 11 and respectively vertically run through two mainboards 1 and the guard flap 13 that corresponds, two guard flap 13's both ends all are equipped with the chamfer, two stop gear 9 sets up at a lateral wall of two guard flaps 13, two guard flap 13's top all is equipped with dust absorption mechanism 6.

When the device works, a worker grasps the handle 4 and does not need to change the angles of the two main boards 1 when roughening the single-sided wall, only the output shaft of the first motor 10 rotates to drive the main gear 51 fixedly connected with the main gear to rotate, however, the main gear 51 rotates to drive the pinion 52 meshed with the main gear to rotate together, the pinion 52 rotates to drive the roughening sheet 2 fixedly connected with the pinion 52 to rotate together, the roughening operation is carried out on the wall after the roughening sheet 2 rotates, then the angles of the two main boards 1 only need to be limited through the limiting mechanism 9, so that the whole device has certain stability, when roughening the wall with an included angle, the joint of the two walls needs to be limited after the angle adjustment of the two main boards 1 is completed through the limiting mechanism 9, then the included angle roughening mechanism 7 is used to push the included angle roughening sheet 71 out to facilitate the grinding of the included angle between the two included angle roughening sheets 71, effectual solved contained angle department can not the problem of roughening, however the gap can appear from the centre in the less acute angle contained angle time phase contrast original dustproof frame 3 of some angles of transform angle roughening, make dustproof effect variation of dustproof frame 3, then can appear the gap when compensateing the transform angle with the both ends of two dustproof frames 3 through setting up telescopic link structure problem, the work efficiency of dust absorption mechanism 6 has been improved greatly, meanwhile dust absorption mechanism 6 is through a plurality of dust extraction holes 11 with it intercommunication, the dust of being framed by dustproof frame 3 when will roughening carries out the suction from a plurality of dust extraction holes 11, make the device can carry out continuation work.

Specifically, a plurality of dust extraction holes 11 are formed in the upper side wall and the lower side wall of the inner wall of the dust-proof frame 3, and penetrate through the upper surface of the dust-proof frame 3 to correspond to the dust extraction holes 11 in the bottom of the main board 1 one by one.

During operation, the dust that the in-process of beating the hair produced can be followed a plurality of dust holes 11 of taking out of dustproof frame 3 inboard and inhaled, then the dust passes mainboard 1 and guard flap 13, is absorbed at last and is stored in dust absorption mechanism 6, and the centralized processing of next time of being convenient for carries out the one-to-one through a plurality of dust holes 11 of taking out, prevents to appear taking out a little that dust holes 11 block up the condition emergence that leads to whole device's dust absorption mechanism 6 paralysis, has increased the rationality of device.

Specifically, each set of the linkage gears 5 includes a main gear 51 and two sub-gears 52, and both the two sub-gears 52 are meshed with the main gear 51 for rotation.

In operation, the output shaft driven by the first motor 10 drives the main gear 51 to rotate, and because the two sub-gears 52 are both meshed with the two main gears 51, the main gear 51 drives the sub-gears 52 to rotate, thereby saving energy.

Specifically, included angle roughening mechanism 7 includes two included angle roughening pieces 71, two second motors 72, two first electric putter 73, two slip tables 74 and two guide rails 75, two spout 76 has still been seted up on mainboard 1, two guide rails 75 sets up the top at spout 76, two slip tables 74 slides respectively and sets up on corresponding guide rail 75, two all fixed second motor 72, two being provided with on the slip table 74 the output shaft of second motor 72 all runs through corresponding spout 76, two first electric putter 73 is fixed respectively and is set up a lateral wall at two mainboards 1, two the back of output shaft fixed connection slip table 74 of first electric putter 73.

During operation, need not transform the angle when one side wall of hacking only need second motor 72 drive contained angle hacking piece 71 rotate can, when needs two walls and contained angle department to hack, carry out the transform and spacing of angle through stop gear 9, make two mainboard 1 and two contained angle hacking pieces 71 adapt to this contained angle, then two first electric putter 73 promote the slider in step and slide on guide rail 75, two sliders slide to drive second motor 72 on the slider and slide in step, electric putter stop work when sliding to suitable position, stop gear 9 carries out spacing not accurate when preventing contained angle hacking piece 71 skew angle from causing the hacking to two mainboard 1 this moment, and use to make contained angle hacking mechanism 7 more steady in the process of hacking through stop gear 9's cooperation, high efficiency, and the work efficiency is improved.

Specifically, the limiting mechanism 9 includes a limiting gear 91, a limiting rod 92, a limiting rack 93 and a second electric push rod 94, the limiting gear 91 rotates and is disposed above the hinge shaft, one end of the limiting rod 92 is fixedly connected to the upper surface of the limiting gear 91, the other end of the limiting rod 92 is fixedly disposed on a side wall of the protective baffle 13, the second electric push rod 94 is fixedly disposed on a side wall of the protective baffle 13, the limiting rack 93 is disposed at an output shaft end portion of the second electric push rod 94, and the limiting rack 93 is meshed with the limiting gear 91.

When the wall sanding machine works, the output shaft of the second electric push rod 94 is kept fixed when one wall is sanded, because the output shaft of the second electric push rod 94 is kept fixed, the limiting rack 93 arranged at the end part of the output shaft of the second electric push rod 94 is also kept unchanged, the limiting rack 93 is kept unchanged at the original position, and the limiting rack 93 and the limiting gear 91 are in a meshed position relationship, the limiting gear 91 is also kept unchanged, the limiting gear 91 is kept unchanged, so that the limiting rod 92 is also kept unchanged, a limiting and stabilizing effect is achieved when one wall is sanded at ordinary times, however, when an included angle between two walls is sanded, the limiting rack 93 can be retracted backwards through the output shaft of the second electric push rod 94, the limiting rack 93 moves synchronously, and when the limiting rack 93 moves towards the direction of the second electric push rod 94 synchronously, the limiting gear 91 engaged with the limiting rack 93 rotates clockwise, the clockwise rotation of the limiting gear 91 is ninety degrees, the limiting rod 92 arranged on the limiting gear 91 is driven to rotate around the hinged plate 8 as a circle center, the protective baffle 13 connected with the other end of the limiting rod 92 and the main board 1 are driven to overturn around the hinged plate 8 to a proper angle, and the limiting mechanism 9 can automatically change the angle between the two main boards 1 and can also perform limiting and fixing effects on the angle between the two main boards 1 when in roughening.

Specifically, every group dust absorption mechanism 6 includes dust absorption fan 61, dust suction box 62, dust absorption mouth 63, dust outlet and deposits grey case 64, dust suction box 62 sets up in guard flap 13's top, the position that dust suction box 62's bottom corresponds a plurality of suction holes 11 is provided with dust absorption mouth 63, the top at dust suction box 62 is seted up to the dust outlet, dust absorption fan 61 sets up in dust outlet department, it sets up the output at dust absorption fan 61 to deposit grey case 64.

During operation, the dust suction fan 61 is started to suck dust in the dust suction holes 11 corresponding to the dust suction holes 63 into the dust suction box 62 through the dust suction holes 63 correspondingly arranged above the dust suction holes 11, then the dust is sucked from the input end of the dust suction fan 61 through the dust suction fan 61, and then the dust is discharged from the output end to the dust storage box 64 for storage.

Specifically, a drawer 12 is slidably disposed at the bottom of each ash storage box 64, and a handle 4 is disposed at one side of each ash storage box 64.

In operation, when the dust storage box 64 is full of dust, the drawer 12 can be drawn out to clean the dust inside and then be returned to collect the dust.

The working principle is as follows: when a worker grasps the handle 4 to roughen a single-sided wall, the angle change of the two main boards 1 is not needed, only the output shaft of the first motor 10 is required to rotate to drive the main gear 51 fixedly connected with the main gear 51 to rotate, but the main gear 51 rotates to drive the pinion 52 meshed with the main gear to rotate together, the pinion 52 rotates to drive the roughening sheet 2 fixedly connected with the pinion 52 to rotate together, the roughening operation is carried out on the wall after the roughening sheet 2 rotates, then only the output shaft of the second electric push rod 94 is required to be kept stationary, and as the output shaft of the second electric push rod 94 is kept stationary, the limiting rack 93 arranged at the end part of the output shaft of the second electric push rod 94 is also kept stationary, the limiting rack 93 is kept stationary at the original position, and the limiting rack 93 and the limiting gear 91 are in a meshed position relationship, the limiting gear 91 is also kept stationary, the limiting gear 91 keeps still to make the limiting rod 92 keep still equally, thereby play a spacing stable effect when polishing a wall at ordinary times, thereby make the whole device have certain stability, but when roughening the wall that has the contained angle, the handing-over department of two-sided wall just needs to contract backward through the output shaft of second electric putter 94, make limiting rack 93 move in step, limiting rack 93 is when moving to second electric putter 94 direction in step, limiting gear 91 with limiting rack 93 meshing clockwise rotates, limiting gear 91 clockwise ninety degrees, drive the limiting rod 92 that sets up on limiting gear 91 and rotate around articulated slab 8 as the centre of a circle, drive the protection baffle 13 that the limiting rod 92 other end is connected and mainboard 1 and overturn to suitable angle around articulated slab 8, this stop gear 9 not only can alternate the angle between two mainboards 1 automatically and also can be to the angle between two mainboards 1 when roughening The angle carry out spacing fixed effect, then make two mainboard 1 and two contained angles beat piece 71 and adapt to this contained angle, then two first electric putter 73 promote the slider in step and slide on guide rail 75, two sliders slide second motor 72 that drive on the slider and slide in step, electric putter stop work when sliding to suitable position, stop gear 9 carries on spacingly to two mainboard 1 this moment, it is inaccurate when preventing contained angle beat piece 71 skew angle from causing the hacking, and use through stop gear 9's cooperation and make contained angle hacking mechanism 7 more steady at the process of hacking, high efficiency, and the work efficiency is improved, and still solve the problem that contained angle department can not hack among the prior art, nevertheless compare original dustproof frame 3 of comparison after the transform angle and can appear the gap from the centre, make the dustproof effect variation of dustproof frame 3, then compensate the gap that can appear when the transform angle with the both ends of two dustproof frames 3 through setting up telescopic link structure The problem, the work efficiency of dust absorption mechanism 6 has been improved greatly, meanwhile dust absorption mechanism 6 carries out work in step on the way that the work of beating hair goes on, open dust absorption fan 61 and inhale the dust in a plurality of dust extraction holes 11 that dust absorption mouth 63 is corresponding to in dust suction box 62, then inhale the dust from dust absorption fan 61's input through dust absorption fan 61 again, discharge to depositing ash bin 64 from the output again and store, and can take out the dust of clearance the inside once with drawer 12 when depositing the ash bin 64 and filling up, the repacking goes back and continues to collect the dust, make the device can carry out continuation work.

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. The utility model provides a building wall equipment of hiring hair, includes two mainboard (1) and a plurality of hiring hair piece (2), its characterized in that: the dust-proof device is characterized by further comprising two dust-proof frames (3), a plurality of dust-extraction holes (11), a linkage gear (5), a first motor (10), an included angle roughening mechanism (7), hinged plates (8), a limiting mechanism (9) and a dust-absorbing mechanism (6), wherein the hinged plates (8) are provided with a hinged shaft in the middle, the hinged plates (8) are fixedly arranged on one side wall of the two main boards (1), the two main boards (1) are hinged through the hinged plates (8), the dust-proof frames (3) are provided with two U-shaped dust-proof frames (3), the two dust-proof frames (3) are respectively arranged at the bottoms of the two main boards (1), the adjacent sides of the two dust-proof frames (3) are hinged, telescopic rod structures are arranged at the two ends of the two dust-proof frames (3), and the included angle roughening mechanisms (7) are provided with two groups, the two groups of included angle roughening mechanisms (7) are arranged above the two main boards (1) respectively, the linkage gears (5) are arranged in two groups, the linkage gears (5) are arranged on the upper surfaces of the two main boards (1) respectively, the number of the first motors (10) is two, output shafts of the two first motors (10) are fixedly connected above the linkage gears (5), protective baffles (13) are arranged above the two main boards (1) respectively, the dust extraction holes (11) vertically penetrate through the two main boards (1) and the corresponding protective baffles (13) respectively, chamfers are arranged at two ends of the two protective baffles (13), the two limiting mechanisms (9) are arranged on one side wall of the two protective baffles (13), dust absorption mechanisms (6) are arranged above the two protective baffles (13), and each group of linkage gears (5) comprises a main gear (51) and two auxiliary gears (52), the two pinion gears (52) are meshed with the main gear (51) to rotate, the included angle roughening mechanism (7) comprises two included angle roughening sheets (71), two second motors (72), two first electric push rods (73), two sliding tables (74) and two guide rails (75), sliding grooves (76) are further formed in the two main boards (1), the two guide rails (75) are arranged above the sliding grooves (76), the two sliding tables (74) are respectively arranged on the corresponding guide rails (75) in a sliding mode, the second motors (72) are fixedly arranged on the two sliding tables (74), output shafts of the two second motors (72) penetrate through the corresponding sliding grooves (76), the two first electric push rods (73) are respectively fixedly arranged on one side wall of the two main boards (1), and output shafts of the two first electric push rods (73) are fixedly connected with the back faces of the sliding tables (74), the limiting mechanism (9) comprises a limiting gear (91), a limiting rod (92), a limiting rack (93) and a second electric push rod (94), the limiting gear (91) is rotatably arranged above the hinge shaft, one end of the limiting rod (92) is fixedly connected to the upper surface of the limiting gear (91), the other end of the limiting rod (92) is fixedly arranged on one side wall of the protective baffle (13), the second electric push rod (94) is fixedly arranged on one side wall of the protective baffle (13), the limiting rack (93) is arranged at the end part of the output shaft of the second electric push rod (94), the limiting rack (93) is meshed with the limiting gear (91), the output shaft of the first motor (10) rotates to drive the main gear (51) fixedly connected with the output shaft to rotate, however, the main gear (51) rotates to drive the auxiliary gear (52) meshed with the main gear to rotate together, the pinion (52) rotates to drive the sanding sheet (2) fixedly connected with the pinion (52) to rotate together.

2. A building wall roughening apparatus as claimed in claim 1, wherein: the dust extraction holes (11) are arranged on the upper side wall and the lower side wall of the inner wall of the dustproof frame (3) and penetrate through the upper surface of the dustproof frame (3) to be in one-to-one correspondence with the dust extraction holes (11) at the bottom of the main board (1).

3. A building wall roughening apparatus as claimed in claim 1, wherein: every group dust absorption mechanism (6) include dust absorption fan (61), dust collection box (62), dust absorption mouth (63), dust outlet and deposit ash bin (64), dust collection box (62) set up the top at guard flap (13), the position that the bottom of dust collection box (62) corresponds a plurality of dust extraction holes (11) is provided with dust absorption mouth (63), the top at dust collection box (62) is seted up to the dust outlet, dust absorption fan (61) set up in dust outlet department, deposit ash bin (64) and set up the output at dust absorption fan (61).

4. A building wall roughening apparatus as claimed in claim 3, wherein: each bottom of the ash storage box (64) is provided with a drawer (12) in a sliding manner, and one side of each ash storage box (64) is provided with a handle (4).