CN111390682B

CN111390682B - Portable wall surface grinding machine and using method thereof

Info

Publication number: CN111390682B
Application number: CN202010487224.5A
Authority: CN
Inventors: 任瑛楠; 谷志旺; 张波; 陈雪峡; 孙沈鹏; 蔡观生; 王伟茂; 何娇; 张少伟; 王佳伟
Original assignee: Shanghai Construction No 4 Group Co Ltd
Current assignee: Shanghai Construction No 4 Group Co Ltd
Priority date: 2020-06-02
Filing date: 2020-06-02
Publication date: 2020-08-25
Anticipated expiration: 2040-06-02
Also published as: CN111390682A

Abstract

The invention discloses a portable wall surface grinding machine and a using method thereof. The polisher is including gripping handle, driving motor and the blade disc of polishing, still includes the dust cover, sets up in the positive a plurality of hydraulic cushion subassembly of dust cover and the degree of depth adjusting part of polishing. The hydraulic buffer assembly comprises an outer shell, an inner shell, a hydraulic damper and a universal wheel; the hydraulic damper is arranged in the inner shell and the outer shell, and two ends of the hydraulic damper are respectively fixedly connected with the outer shell and the inner shell; the polishing depth adjusting component comprises a stepped limiting clamp, an adjusting button and a connecting rod. The polisher is provided with hydraulic cushion subassembly and the degree of depth adjusting part of polishing, adjusts the position of the spacing card of stairstepping through adjustment button, plays limiting displacement to the removal of inner shell to the flexible position of restriction universal wheel reaches the effect of adjusting the degree of depth of polishing, has that the degree of depth of polishing can accurate control, the efficiency of construction is high, construction quality is good advantage.

Description

Portable wall surface grinding machine and using method thereof

Technical Field

The invention relates to a portable wall surface grinding machine and a using method thereof, and belongs to the technical field of building wall body modification.

Background

When the vertical face of the building brick wall is repaired by adopting brick powder, the old surface of the existing brick wall needs to be polished to expose a solid base layer, and meanwhile, in order to ensure that the repair finish face is clean, after the brick powder coated in batches is hardened, the surface layer needs to be polished to remove protrusions, burrs and the like.

When the wall body is polished, the polishing depth needs to be well controlled, the surface layer of the wall body needs to be polished in place, and the consistency of the overall polishing depth of the wall body needs to be maintained. At present, an operator controls the polishing depth by controlling the acting force applied to the polishing machine, the polishing precision is difficult to guarantee, and the problems of poor construction quality and low construction efficiency exist.

Disclosure of Invention

The invention provides a portable wall surface grinding machine and a using method thereof, aiming at the problems that the grinding precision is difficult to guarantee, the construction quality is poor and the construction efficiency is low when a grinding machine is used for grinding the surface of a wall body, and the portable wall surface grinding machine has the advantages of accurately controllable grinding depth, high construction efficiency and good construction quality.

In order to solve the technical problems, the invention comprises the following technical scheme:

the utility model provides a portable wall polisher, is including gripping handle, driving motor and the blade disc of polishing, still includes:

the back surface of the dust cover is fixed on the shell of the driving motor, and the polishing cutter head is positioned on the front surface of the dust cover and is fixedly connected with a transmission shaft of the driving motor;

the hydraulic buffer assemblies are arranged on the front face of the dust cover and comprise outer shells, inner shells, hydraulic dampers and universal wheels; one end of the inner shell is embedded in the outer shell and can slide relative to the outer shell along the axial direction; the other end of the outer shell is fixed on the front surface of the dust cover, and the universal wheel is arranged at the other end of the inner shell; the hydraulic damper is arranged in the inner shell and the outer shell, and two ends of the hydraulic damper are respectively fixedly connected with the outer shell and the inner shell;

the polishing depth adjusting assembly comprises a stepped limiting clamp, an adjusting button and a connecting rod; the end part of the shell is provided with a strip-shaped hole, the connecting rod is positioned in the strip-shaped hole and can move along the length direction of the strip-shaped hole, and the stepped limiting clamp and the adjusting button are respectively positioned at the two ends of the connecting rod; the end part of the inner shell at the position corresponding to the stepped limiting clamp is provided with a notch, and when the hydraulic damper contracts, the stepped limiting clamp can be abutted to the inner shell wall plate at the notch.

Further, be provided with the pilot lamp on the shell, be provided with the spacing card contact position of stairstepping on the inner shell wallboard and be used for controlling the touch switch of pilot lamp.

Further, the dust cover comprises a hard outer frame, a transparent plate and a rib plate; the hard outer frame is fixedly connected with a shell of the driving motor through a ribbed plate; the transparent plate is fixed in the hard frame and used for observing the working condition of the polishing cutter head in the dust cover.

Furthermore, a soft brush is arranged along the top edge and the side edge of the hard outer frame, and a water mist spray head is arranged at the inner side of the soft brush at the top edge of the hard outer frame;

a rubber bottom support is arranged on the bottom edge of the hard outer frame, and a water collecting hole is formed in the rubber bottom support;

the pappus brushes are closely arranged, the rubber bottom support is closely contacted with the pappus brushes on the two sides, and the pappus brushes are used for blocking water mist and dust from penetrating when the polisher works.

Furthermore, the polishing depth adjusting assembly also comprises a positioning pin box, a positioning pin and a sawtooth-shaped limiting clamp, wherein the positioning pin box is arranged on one side of the stepped limiting clamp, an opening is formed in the positioning pin box, the positioning pin is fixed in the positioning pin box through an elastic device, and the positioning pin extends out of the opening under the elastic force of the elastic device and can be retracted into the positioning pin box under the action of external force; the end part of the shell is provided with a sawtooth-shaped limiting clamp matched with the positioning pin.

Furthermore, a dial is arranged beside the strip-shaped hole on the outer side of the shell, and scales on the dial correspond to the grinding depth of the grinding machine allowed by the stepped limiting clamp;

and a pointer matched with the dial for use is arranged on the adjusting button.

Correspondingly, the invention also provides a using method of the grinding machine, which comprises the following steps:

step one, determining the depth of a wall surface to be polished, adjusting the position of a stepped limiting clamp through an adjusting button, and setting all polishing depth adjusting components of the polishing machine to be the required polishing depth;

step two, starting a grinding machine, gradually pressing the grinding machine to a wall surface to grind a circular groove, and moving the grinding machine downwards along the wall surface to grind to form a vertical strip-shaped groove when the grinding depth of the grinding machine reaches the maximum;

moving the grinding machine to an adjacent area to be ground, supporting a universal wheel of a hydraulic buffer assembly on one side of the grinding cutter head in the ground area, and adjusting an adjusting button of the hydraulic buffer assembly in the ground area to enable the maximum moving depth of the universal wheel to be adjusted to be flush with the surface of the grinding cutter head; repeating the second step to form a second strip-shaped groove;

and step four, repeating the step three until finishing the surface layer polishing construction of the wall surface.

Furthermore, an indicator lamp is arranged on the outer shell, and a touch switch for controlling the indicator lamp is arranged at the contact part of the inner shell wall plate and the stepped limiting card;

in the second step, the judgment standard of the grinding depth of the grinding machine reaching the maximum is that the inner shell moves to the stepped limiting card to trigger the touch switch and enable the indicator lamp to be turned on or turned from red to green.

Furthermore, the polishing depth adjusting assembly also comprises a positioning pin box, a positioning pin and a limiting card, wherein the positioning pin box is arranged on one side of the stepped limiting card, an opening is formed in the positioning pin box, the positioning pin is fixed in the positioning pin box through an elastic device, and the positioning pin extends out of the opening under the elastic force of the elastic device and can be retracted into the positioning pin box under the action of external force; the limiting clamp is arranged on the inner side of the end part of the shell and is provided with a sawtooth structure matched with the positioning pin; a dial is arranged beside the strip-shaped hole at the outer side of the shell, and scales on the dial correspond to the grinding depth allowed by the stepped limiting clamp; the adjusting button is provided with a pointer matched with the dial for use;

the depth of the polishing depth adjusting assembly in the first step is set in a mode that an adjusting button is pushed to enable the reading on a dial disc indicated by a pointer to be the required polishing depth;

in the third step, "the maximum moving depth of the universal wheel is adjusted to be flush with the surface of the polishing cutter head", specifically, the adjusting button is pushed, so that the reading on the dial indicated by the pointer is zero.

Further, the dust cover comprises a hard outer frame, wherein a soft brush is arranged along the top edge and the side edge of the hard outer frame, and a water mist spray head is arranged at the inner side of the soft brush on the top edge of the hard outer frame; a rubber bottom support is arranged on the bottom edge of the hard outer frame, and a water collecting hole is formed in the rubber bottom support;

step two to step four, when the wall body was polished to the polisher, water smoke shower nozzle sprayed water smoke to the dust cover in, water smoke attached to form the drop on the dust that produces of polishing and fall to the rubber collet to collect to the water catch bowl, discharge through external collector pipe.

Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:

(1) the polishing machine is provided with a hydraulic buffer assembly and a polishing depth adjusting assembly, the polishing machine can be supported on the wall surface through the hydraulic buffer assembly, the position of the stepped limiting clamp can be adjusted through the polishing depth adjusting assembly, and the position limiting effect on the movement of the inner shell is achieved, so that the telescopic position of the universal wheel is limited, and the polishing depth adjusting effect is achieved; by arranging the positioning pin box, the positioning pin and the limiting card and correspondingly arranging the pointer and the dial, the polishing depth can be accurately controlled; by arranging the indicating lamp and the touch switch of the contact, an operator can conveniently judge whether the set polishing depth is reached;

(2) the hard frame and the rib plate are arranged, so that the dust cover is firmly connected with the motor shell, and the stability of the dust cover is improved; the transparent plate is arranged, so that the real-time polishing condition of the inner wall body of the dust cover can be observed conveniently; through setting up pappus brush, rubber collet and water smoke shower nozzle, can prevent that the in-process dust of polishing from spilling over, play the dust fall effect.

Drawings

FIG. 1 is a schematic rear view of a portable wall sander according to one embodiment of the present invention;

FIG. 2 is a schematic front view of a portable wall sander in accordance with one embodiment of the present invention;

FIG. 3 is a schematic diagram of a hydraulic cushion assembly and a sanding depth adjustment assembly in accordance with one embodiment of the present invention;

FIG. 4 is a horizontal cross-sectional view of a hydraulic cushion assembly;

FIG. 5 is a schematic view of the sanding depth adjustment assembly;

FIG. 6 is a schematic structural view of the position-limiting clip disposed on the housing;

FIG. 7 is a diagram of the relationship of the sanding depth adjustment assembly to the outer shell and the inner shell;

FIG. 8 is a diagram showing the positional relationship among the pin box, the pin, and the stopper;

FIG. 9 is a cross-sectional view of the dowel box;

fig. 10 to 12 are schematic views of wall surface polishing by the portable wall surface polisher.

The numbers in the figures are as follows:

1-a grip handle; 2-driving the motor; 3-grinding the cutter head;

4-dustproof cover, 41-hard outer frame; 42-a transparent plate; 43-ribbed plate; 44-rubber bottom support; 45-water collecting holes; 46-a soft brush; 47-water mist spray head; 48-a water collecting pipe;

5-a hydraulic buffer assembly; 51-a housing; 511-strip shaped holes; 52-inner shell; 521-a notch; 53-hydraulic dampers; 54-universal wheels;

6-grinding depth adjusting assembly; 61-step-shaped limit card; 62-an adjustment button; 63-connecting rod; 64-an indicator light; 65-touch switch; 66-a saw-tooth limiting card; 67-locating pins; 68-locating pin boxes; 69-elastic means; 70-dial plate; 71-a pointer; 8, a wall surface; 81-polished area; 82-construction path.

Detailed Description

The portable wall sander and method of using the portable wall sander provided by the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent in conjunction with the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

Example one

Referring to fig. 1 and 2, the portable wall surface grinding machine provided by the present embodiment includes a holding handle 1, a driving motor 2, a grinding cutter head 3, a dust cover 4, a plurality of hydraulic buffer assemblies 5, and a grinding depth adjusting assembly 6.

The back of the dust cover 4 is fixed on the shell of the driving motor 2, and the polishing cutter head 3 is located on the front of the dust cover 4 and is fixedly connected with a transmission shaft of the driving motor 2. Further, the dust cover 4 includes a hard outer frame 41, a transparent plate 42 and a rib plate 43, the positions of four corners of the hard outer frame 41 are respectively and fixedly connected with the housing of the driving motor 2 through one rib plate 43, the hard outer frame 41 is a rectangular frame formed by plates with an L-shaped cross section, and the transparent plate 42 is fixed in the hard frame. The transparent plate 42 can be sleeved on the shell of the driving motor or the transmission shaft of the driving motor. Through setting up stereoplasm frame and floor 43, make dust cover 4 and drive motor casing firmly link together, improved the stability of dust cover 4. Through setting up transparent plate 42, be convenient for observe the dust cover 4 interior wall body condition of polishing in real time.

As shown in fig. 2, one hydraulic cushion unit 5 is disposed at each of four corners of the front surface of the rigid outer frame 41. As shown in fig. 3 and 4, the hydraulic buffer assembly 5 includes an outer casing 51, an inner casing 52, a hydraulic damper 53, and a universal wheel 54. One end of the inner shell 52 is embedded in the outer shell 51 and can slide relative to the outer shell 51 along the axial direction. The hydraulic damper 53 is disposed in the inner shell 52 and the outer shell 51, and both ends of the hydraulic damper are respectively fixedly connected with the outer shell 51 and the inner shell 52. A universal wheel 54 is provided at the other end of the inner shell 52, and a hydraulic damper 53 provides compression damping and a resilient force to the universal wheel 54. Specifically, the outer shell 51 and the inner shell 52 each include a closed end and an open end, the closed end of the outer shell 51 is fixed on the front surface of the dust cover, and the open end of the inner shell 52 is arranged in the outer shell 51 and can slide along the axial direction of the outer shell 51; the universal wheel 54 is disposed outside the closed end of the inner case 52.

As shown in fig. 5 to 7, the sanding depth adjusting assembly 6 includes a stepped stopper 61, an adjusting button 62, and a link 63. The closed end of the outer shell 51 is provided with a strip-shaped hole 511, the connecting rod 63 is positioned in the strip-shaped hole 511 and can move along the length direction of the strip-shaped hole 511, the stepped limiting clamp 61 and the adjusting button 62 are respectively positioned at two ends of the connecting rod 63, a notch 521 is arranged at the end part of the inner shell 52 at the position corresponding to the stepped limiting clamp 61, when the hydraulic damper 53 contracts, the stepped limiting clamp 61 can be abutted to the wall plate of the inner shell 52 below the notch 521, the movement of the inner shell 52 is limited, and therefore the telescopic position of the universal wheel 54 is limited, and the polishing depth is adjusted. Further, the tip of shell 51 is provided with pilot lamp 64, the position of contact with stairstepping spacing card 61 on the inner shell 52 wallboard is provided with the touch switch 65 that is used for controlling pilot lamp 64, when inner shell 52 tip supported on stairstepping spacing card 61, triggered touch switch 65, pilot lamp 64 lights or pilot lamp 64 turns into green by red, reminds operating personnel to reach the depth of polishing. By pushing the adjusting button 62, the contact position of the stepped limiting clamp 61 and the wall plate of the inner shell 52 can be adjusted, so that the polishing depth can be adjusted. The housing 51 of the sanding depth adjustment assembly 6 is fixed to a rigid frame on the front of the dust cover, and the rigid frame is provided with an opening so that an operator can operate the adjustment button 62 and the observation indicator lamp 64 on the back of the dust cover.

Further, as shown in fig. 5, 8 and 9, a positioning pin box 68 is disposed on one side of the stepped limiting card 61, an opening is disposed on the positioning pin box 68, a positioning pin 67 is disposed in the positioning pin box 68, the positioning pin 67 is fixed by an elastic sheet 69, the positioning pin 67 extends from the opening and can be retracted into the positioning pin box 68 under the action of an external force, and a zigzag limiting card 66 used in cooperation with the positioning pin 67 is disposed on the inner side of the end portion of the housing 51. The adjusting button 62 is pushed, the positioning pin 67 can slide on the sawtooth-shaped limiting clamp 66, and under the action of the elastic sheet 69 in the positioning box, the tip end of the positioning pin 67 is clamped in the tooth groove of the sawtooth-shaped limiting clamp 66, so that the positioning pin 67 and the sawtooth-shaped limiting clamp 66 are engaged in a grading manner, and the positioning of the stepped-shaped limiting clamp 61 is realized. In a more preferred embodiment, as shown in fig. 3 and 6, a dial 70 is provided on the housing 51 on the side of the adjustment button 62, and a pointer 71 is provided on the adjustment button 62, and the data of the pointer 71 on the dial 70 represents the allowable sanding depth, thereby precisely controlling the sanding depth of the sanding cutterhead.

The preferred mode of operation of the sanding depth adjustment assembly 6 is further described below. For example, the polishing depth which can be adjusted by the stepped limit card 61 of the polishing depth adjusting assembly 6 is 0mm, 5mm, 10mm, 15mm and 20mm, corresponding scales are marked on the dial 70, and the pointer 71 indicates the currently allowed maximum polishing depth of the polishing machine when pointing on the corresponding scales. After the wall surface grinding depth is determined, for example, the grinding depth is 10mm, the adjusting button 62 is pushed, the connecting rod 63 moves up and down in the strip-shaped hole 511 to drive the stepped limiting clamp 61 to move, the positioning pin 67 on the side of the stepped limiting clamp 61 slides on the sawtooth limiting clamp 66 under the action of elasticity and thrust, when the pointer on the adjusting button 62 points at the position of 10mm, the adjusting button 62 stops being pushed, and the positioning pin is meshed and fixed with the sawtooth limiting clamp 66. When a grinding cutter head of the grinding machine is pressed to a wall surface, the grinding depth is gradually increased, and the inner shell 52 compresses the hydraulic damper 53 and retracts into the outer shell 51 along the axial direction; when the grinding depth reaches 10mm, the wall plate below the notch 521 of the inner shell 52 abuts against the stepped limiting clamp 61, and the inner shell 52 cannot move continuously, so that the grinding depth of the grinding machine is limited to 10 mm; at this moment, the stepped limiting card 61 triggers the touch switch 65, the indicator lamp 64 lights or turns from red to green, and the operator is prompted that the wall surface reaches the set polishing depth. Therefore, the grinding machine provided by the embodiment can realize accurate adjustment of the grinding depth by matching the adjusting button 62, the stepped limiting clamp 63, the notch 521 of the inner shell, the positioning pin 67, the sawtooth limiting clamp 66, the positioning pin box 68, the elastic device 69, the pointer 71 and the dial 70; set up on the wallboard of the notch 521 below through the inner shell and touch switch 65, shell tip and set up pilot lamp 64, when using with other subassembly cooperations of the degree of depth adjustment subassembly 6 of polishing, can realize that the wall reaches when setting for the degree of depth of polishing, in time remind operating personnel to carry out operation on next step, can effectively improve the efficiency of construction.

In a preferred embodiment, as shown in fig. 1 and fig. 2, the soft brush 46 is disposed along the top and side edges of the hard outer frame 41, the water mist nozzle 47 is disposed inside the soft brush 46 on the top edge of the hard outer frame 41, the rubber bottom support 44 is disposed on the bottom edge of the hard outer frame 41, the rubber bottom support 44 is provided with a water collecting hole 45, and the bottom of the water collecting hole 45 is provided with an external water collecting pipe 48. Through setting up water smoke shower nozzle 47, spray water smoke in to the enclosure space when polishing and carry out the dust fall. The two sides and the top of the soft brush 46 and the bottom of the rubber bottom support 44 form a closed space to surround the polishing cutter head 3, the soft brushes are closely arranged to prevent water mist and dust from penetrating, and meanwhile, the soft brushes have certain flexibility and play a role of cleaning the wall surface when the polishing machine moves along the wall surface. The rubber mounting 44 is used for collecting slurry formed during polishing, two sides of the rubber mounting 44 are in close contact with the soft brush 46, and the rubber mounting 44 has a certain gradient, so that the slurry is conveniently converged into the water collecting hole 45. In order to ensure that the rubber bottom support 44 can keep the basic shape unchanged and can be in seamless contact with the wall surface, the rubber bottom support 44 is composed of hard rubber which is not easy to deform and soft silica gel strips arranged on the outer side. It should be noted that the water spray nozzle 47 is connected to a water supply pipe (not shown), the water collecting hole 45 is externally connected to a water collecting pipe 48, the water collecting pipe 48 is connected to a water tank, and water in the water tank can be recycled after being clarified.

In summary, the portable wall surface grinding machine provided by the invention has the following advantages:

(1) the polisher is provided with a hydraulic buffer assembly 5 and a polishing depth adjusting assembly 6, the polisher can be supported on a wall surface through the hydraulic buffer assembly 5, the position of the stepped limiting clamp 61 can be adjusted through the polishing depth adjusting assembly 6, and the inner shell 52 can be limited in movement, so that the telescopic position of the universal wheel 54 is limited, and the polishing depth can be adjusted; by arranging the positioning pin box 68, the positioning pin 67 and the sawtooth-shaped limiting card 66 and correspondingly arranging the pointer 71 and the dial 70, the polishing depth can be accurately controlled; by arranging the indicator lamp 64 and the touch switch 65 of the contact, an operator can conveniently judge whether the set polishing depth is reached;

(2) by arranging the hard frame and the rib plate 43, the dust cover 4 is firmly connected with the shell of the drive motor, so that the stability of the dust cover 4 is improved; the transparent plate 42 is arranged, so that the real-time polishing condition of the inner wall body of the dust cover 4 can be observed conveniently; through setting up pappus brush 46, rubber collet 44 and water smoke shower nozzle 47, can prevent that the in-process dust of polishing from spilling over, play the dust fall effect.

Example two

This embodiment provides a method for using a portable wall surface sander, which uses the sander of the first embodiment, and is further described with reference to fig. 10 to 12, and with reference to fig. 1 to 9. The using method comprises the following steps:

step one, determining the depth of a wall surface to be polished, adjusting the position of a stepped limiting clamp 61 through an adjusting button 62, and setting all polishing depth adjusting components 6 of the polishing machine to be the required polishing depth;

step two, as shown in fig. 10, starting the grinding machine, gradually pressing the grinding machine to the wall surface 8 to grind a circular groove, as shown in fig. 11, when the grinding depth of the grinding machine reaches the maximum, moving the grinding machine downwards along the wall surface 8 to grind and form a vertical strip-shaped groove;

step three, as shown in fig. 12, moving the polishing machine to an adjacent region to be polished, supporting the universal wheel of the hydraulic buffer assembly on one side of the polishing cutter head 3 in the polished region 81, supporting the other side in the region to be polished, and adjusting the adjusting button of the hydraulic buffer assembly in the polished region to adjust the maximum moving depth of the universal wheel to be flush with the surface of the polishing cutter head, wherein the position of the adjusting button in the region to be polished is unchanged; repeating the second step to form a second strip-shaped groove;

and step four, repeating the step three until finishing the surface layer polishing construction of the wall surface. During the wall surface grinding process, the wall surface grinding can be performed in sequence according to the construction path 82 in fig. 12.

In the second step, "when the grinding depth of the grinding machine reaches the maximum" is determined as that the grinding machine is pressed to the wall surface by force, the inner shell 52 and the outer shell 51 of the hydraulic buffer assembly 5 do not move any more, that is, the end of the inner shell 52 is already abutted against the stepped limiting clamp 61. In a more preferable embodiment, the outer shell 51 is provided with an indicator lamp 64, and the contact part of the wall plate of the inner shell 52 and the stepped limit card 61 is provided with a touch switch 65 for controlling the indicator lamp 64; in the second step, the criterion of "when the grinding depth of the grinding machine reaches the maximum" is that the inner shell 52 moves to the stepped limit card 61 to trigger the touch switch 65 and turn the indicator lamp 64 on or turn the red color to the green color. The sander moves downward, and in the process of sanding vertical bar-shaped grooves, the indicator light 64 is kept on or green all the time.

Further, the grinding depth adjusting assembly 6 further comprises a positioning pin box 68, a positioning pin 67 and a sawtooth-shaped limiting clamp 66, the positioning pin box 68 is arranged on one side of the stepped limiting clamp 61, an opening is formed in the positioning pin box 68, the positioning pin 67 is fixed in the positioning pin box 68 through an elastic device, the positioning pin 67 extends out of the opening under the elastic force of the elastic device and can retract into the positioning pin box 68 under the external force; the sawtooth-shaped limiting clamp 66 is arranged on the inner side of the end part of the shell 51, and a sawtooth-shaped structure matched with the positioning pin 67 is arranged on the sawtooth-shaped limiting clamp 66; a dial 70 is arranged beside the strip-shaped hole 511 on the outer side of the shell 51, and scales on the dial 70 correspond to the grinding depth allowed by the stepped limiting clamp 61; the adjusting button 62 is provided with a pointer 71 matched with the dial 70;

the depth of the sanding depth adjustment assembly 6 in step one is set by pushing the adjustment button 62 so that the dial 70 indicated by the pointer 71 reads the desired sanding depth.

In the third step, "the maximum moving depth of the universal wheel 54 is adjusted to be flush with the surface of the polishing cutterhead 3", specifically, the adjusting button 62 is pushed to make the reading on the dial 70 indicated by the pointer 71 be zero. The reading 0 on the dial 70 corresponds to that when the end part of the inner shell 52 is pressed against the stepped limiting clamp 61, the end part of the universal wheel 54 is flush with the grinding cutterhead 3. The reading H on the dial 70 corresponds to the distance H that the grinding cutterhead 3 exceeds the end part of the universal wheel 54 when the end part of the inner shell 52 is abutted against the stepped limiting clamp 61.

Further, the dust cover 4 comprises a hard outer frame 41, a soft brush 46 is arranged along the top edge and the side edge of the hard outer frame 41, and a water mist nozzle 47 is arranged inside the soft brush 46 on the top edge of the hard outer frame 41; the bottom edge of the hard outer frame 41 is provided with a rubber bottom support 44, and the rubber bottom support 44 is provided with a water collecting hole 45. In the second to fourth steps, when the wall body is polished by the polisher, the water mist spray head 47 sprays water mist into the dust cover 4, the water mist is attached to dust generated by polishing to form water drops, falls onto the rubber bottom support 44, is collected to the water collecting hole 45, and is discharged through the external water collecting pipe 48.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a portable wall polisher, is including gripping handle, driving motor and the blade disc of polishing, its characterized in that still includes:

the hydraulic buffer assemblies are arranged on the front face of the dust cover and comprise outer shells, inner shells, hydraulic dampers and universal wheels; one end of the inner shell is embedded in the outer shell and can slide relative to the outer shell along the axial direction; one end of the outer shell is fixed on the front surface of the dust cover, and the universal wheel is arranged at the other end of the inner shell; the hydraulic damper is arranged in the inner shell and the outer shell, and two ends of the hydraulic damper are respectively fixedly connected with the outer shell and the inner shell;

2. A sanding machine according to claim 1,

the shell is provided with an indicator lamp, and the inner shell wallboard is provided with a touch switch used for controlling the indicator lamp at the contact part with the stepped limiting card.

3. A sanding machine according to claim 1,

the dust cover comprises a hard outer frame, a transparent plate and a ribbed plate; the hard outer frame is fixedly connected with a shell of the driving motor through a ribbed plate; the transparent plate is fixed in the hard frame and used for observing the working condition of the polishing cutter head in the dust cover.

4. A sanding machine according to claim 3,

the soft brush is arranged along the top edge and the side edge of the hard outer frame, and the inner side of the soft brush at the top edge of the hard outer frame is provided with a water mist spray head;

5. A sanding machine according to claim 1,

the polishing depth adjusting assembly further comprises a positioning pin box, a positioning pin and a sawtooth-shaped limiting card, the positioning pin box is arranged on one side of the stepped limiting card, an opening is formed in the positioning pin box, the positioning pin is fixed in the positioning pin box through an elastic device, and the positioning pin extends out of the opening under the elastic force of the elastic device and can retract into the positioning pin box under the action of external force; the end part of the shell is provided with a sawtooth-shaped limiting clamp matched with the positioning pin.

6. A sanding machine according to claim 5,

a dial is arranged beside the strip-shaped hole on the outer side of the shell, and scales on the dial correspond to the grinding depth of the grinding machine allowed by the stepped limiting clamp;

7. A method of using a sander as set forth in claim 1, comprising the steps of:

8. The use method of claim 7, wherein an indicator lamp is arranged on the outer shell, and a touch switch for controlling the indicator lamp is arranged at the contact part of the inner shell wall plate and the stepped limiting card;

9. The use method of claim 7, wherein the sanding depth adjusting assembly further comprises a positioning pin box, a positioning pin and a limiting clamp, the positioning pin box is arranged on one side of the stepped limiting clamp, an opening is formed in the positioning pin box, the positioning pin is fixed in the positioning pin box through an elastic device, and the positioning pin extends out of the opening under the elastic force of the elastic device and can retract into the positioning pin box under the external force; the limiting clamp is arranged on the inner side of the end part of the shell and is provided with a sawtooth structure matched with the positioning pin; a dial is arranged beside the strip-shaped hole at the outer side of the shell, and scales on the dial correspond to the grinding depth allowed by the stepped limiting clamp; the adjusting button is provided with a pointer matched with the dial for use;

10. The use according to claim 7,

the dust cover comprises a hard outer frame, wherein a soft brush is arranged along the top edge and the side edge of the hard outer frame, and a water mist spray head is arranged at the inner side of the soft brush on the top edge of the hard outer frame; a rubber bottom support is arranged on the bottom edge of the hard outer frame, and a water collecting hole is formed in the rubber bottom support;