Machine head structure of wall surface grinding machine

Abstract

The utility model relates to a polishing mechanism. A machine head structure of a wall face grinding machine comprises a grinding disc outer cover, a grinding disc is arranged in the grinding disc outer cover, the grinding disc outer cover comprises a bottom plate and a base, a rotating seat is arranged on the base, a brush clamping groove is formed in the rotating seat, and a brush ring is installed in the brush clamping groove. A brush adjusting structure is arranged between the rotating seat and the base and comprises a positioning locking piece and a lifting piece, and the lifting piece drives the rotating seat to ascend and descend and then fixes the position of the rotating seat through the positioning locking piece. The machine head structure of the wall face grinding machine is simple in structure, the length of a brush can be adjusted, the service life of the brush can be prolonged, cost can be reduced, and the service life of a machine head can be prolonged. The technical problems that in the prior art, after a brush on a machine head of a wall face grinding machine is abraded, the brush needs to be replaced, time and labor are wasted, and the use cost is high are solved.

Description

Technical Field

[0001] The utility model relates to a grinding mechanism, in particular to a head structure of a wall grinding machine. Background Art

[0002] During decoration, most of the time, the wall needs to be processed. Generally, a layer of putty is applied to the wall first, and then the putty is smoothed by a wall grinder before painting. A wall grinder is a commonly used wall grinding equipment. The wall grinder generally includes a handle, and a machine head structure is installed at one end of the handle. The machine head structure includes a grinding disc cover, and a grinding disc is installed in the grinding disc cover. The grinding disc is driven to rotate by a motor, and sandpaper is fixed on the grinding disc for grinding. In order to avoid dust flying around during grinding, a circle of brushes is generally installed on the outer ring of the grinding disc. The brush is generally flush with the grinding disc, but after a period of use, the brush will be worn, and the length of the brush is shorter than the grinding disc, so the brush cannot play its role. The brush needs to be replaced, which is troublesome to replace, and there are actually many brushes that are not used, and there is also a certain degree of waste of brushes. Summary of the invention

[0003] The utility model provides a head structure of a wall grinder with a simple structure, which can adjust the length of the brush, extend the use time of the brush, reduce costs, and increase the service life of the head; it solves the technical problem in the prior art that the brush on the head of the wall grinder needs to be replaced after being worn, which is time-consuming, labor-intensive, and has high use costs.

[0004] The above technical problems of the utility model are solved by the following technical solutions: a head structure of a wall grinding machine, including a grinding disc outer cover, a grinding disc is arranged inside the grinding disc outer cover, the grinding disc outer cover includes a bottom plate and a base, a rotating seat is arranged on the base, a brush card slot is opened on the rotating seat, and a brush ring is installed in the brush card slot; a brush adjustment structure is arranged between the rotating seat and the base, the brush adjustment structure includes a positioning locking member and a lifting member, and the lifting member drives the rotating seat to rise and fall and fixes the position of the rotating seat through the positioning locking member. After the brush is worn, the rotating seat is adjusted by the brush adjustment structure, and after the rotating seat is adjusted to the right position, the rotating seat is locked by the positioning locking member. After the rotating seat moves axially, the brush is driven to extend axially, so that it can continue to be used. The service life of the brush is increased, the brush does not need to be replaced repeatedly, and the cost is reduced. The base and bottom plate of the grinding disc outer cover can be integrally formed or a split structure.

[0005] Preferably, the lifting member includes a pin and a spiral groove, wherein the pin is fixed on the inner side wall of the rotating seat, the spiral groove is installed on the spiral groove seat, and the spiral groove seat is fixed on the bottom plate. The spiral groove provides a guide for the pin, allowing the pin to move upwardly in an inclined manner, thereby driving the rotating seat to rotate upward.

[0006] Preferably, the lifting member further comprises a plurality of inclined protrusions evenly distributed on the base, and an inclined groove cooperating with the inclined protrusions is provided on the rotating base. The cooperation of the inclined protrusions and the inclined grooves can assist the rotation and resetting of the rotating seat, and the rotating seat can be rotated and raised more conveniently. At the same time, because the internal space of the rotating seat is limited, only three spiral lifting members cooperating with the pin can be arranged. In order to ensure that the rotating seat is more stable during use, the cooperation of the inclined protrusions and the inclined grooves is designed, so that after the rotating seat is adjusted and raised, the stability of use is improved.

[0007] Preferably, the inclined surface protrusion is in the shape of an inclined step, which provides a stop and positioning position for the inclined surface protrusion, so that the rotation of the rotating seat forms a gear and rises to a certain height each time it rotates.

[0008] Preferably, the positioning locking member comprises a positioning plate fixed on the inner wall of the rotating seat, 2-3 positioning grooves are provided on the positioning plate, an upwardly concave cavity is provided on the bottom plate, a compression spring is installed in the cavity, a pressing plate is provided below the cavity, one end of the compression spring abuts against the upper wall of the cavity, the other end of the compression spring abuts against the pressing plate, a positioning shaft is fixed on the pressing plate, one end of the positioning shaft is located in the positioning groove, and the compression spring is located outside the positioning shaft. The positioning shaft is always pressed into the positioning groove by the compression spring, and when adjustment is required, the compression spring is used to make the positioning shaft pop out of the positioning groove, and the rotating seat is adjusted to complete the rise of the brush. 2-3 positioning grooves can correspond to 2-3 gear adjustments.

[0009] Preferably, there are three lifting members, which are evenly distributed on the inner side of the rotating seat.

[0010] Preferably, a stopper protrusion is provided on the inner wall of the brush slot of the rotating seat, and the upper surface of the stopper protrusion is an inclined surface, which is inclined from the slot wall to the inside of the slot. The brush ring is fixed in the brush slot by the stopper protrusion, and the inclined stopper protrusion allows the brush ring to be inserted into the brush slot from top to bottom, but will not jump out of the brush slot.

[0011] Preferably, the rotating seat and the base are coaxial annular bodies, a lamp ring is fixed on the base, and the base is fixed to the bottom plate by bolts.

[0012] Preferably, the base and the bottom plate are integrally formed, and the integrally formed structure has a simple process.

[0013] Preferably, the rotating seat is provided with a toggle protrusion for toggle the rotating seat to rotate. The operation is convenient, and by operating the toggle protrusion, the pin shaft is rotated in the spiral groove, thereby realizing the lifting and lowering of the rotating seat.

[0014] Therefore, the head structure of a wall grinding machine of the utility model has the following advantages: simple structure, the pin shaft on the rotating seat moves in the spiral groove, driving the rotating seat to spirally rise, so that the brush extends outward, and the brush does not need to be replaced repeatedly, so that the brush can always be flush with the grinding disc, thereby increasing the service life of the brush and reducing the cost. At the same time, a positioning locking piece is designed to fix the position of the rotating seat after adjustment, thereby improving the stability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the head structure of a wall grinding machine.

[0016] Figure 2 yes Figure 1 Stereoscopic view with the grinding disc removed.

[0017] Figure 3 yes Figure 2 Top view of the .

[0018] Figure 4 yes Figure 3 AA cross-sectional view.

[0019] Figure 5 yes Figure 4 An enlarged view of point B.

[0020] Figure 6 It is a three-dimensional diagram of the rotating seat.

[0021] Figure 7 It is a three-dimensional image of the base. DETAILED DESCRIPTION

[0022] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0023] Example:

[0024] like Figure 1 As shown, a head structure of a wall grinding machine includes a grinding disc outer cover, which is composed of a disc-shaped bottom plate 13 and an annular base 14, and the annular base 14 is fixed to the bottom plate 13 by screws. A grinding disc motor 1 is installed on one side of the bottom plate 13, and the motor shaft 24 of the grinding disc motor 1 passes through the through hole in the center of the bottom plate to fix the grinding disc 6. A rotating seat 7 is provided above the base 14, and the rotating seat 7 is also annular, and a toggle protrusion 25 is integrally formed on the rotating seat facing the grinding disc motor side.

[0025] like Figure 2 and3 As shown, a brush slot 20 is provided on the rotating seat 7, a brush ring 16 is installed in the brush slot 20, and a brush 5 is fixed on the brush ring 16. A retaining ring 4 is connected to the outer surface of the brush ring 16, and the retaining ring 4 is used to block part of the brush. A stopper protrusion 22 is formed on the groove wall on one side of the brush slot 20, and the upper surface of the stopper protrusion 22 is an inclined surface, which facilitates the brush ring 16 to be inserted into the brush slot 20 along the inclined surface, and can prevent the brush ring 16 from falling out of the brush slot 20.

[0026] Three spiral groove seats 10 are fixed on the bottom plate 13 by screws, and the three spiral groove seats 10 are evenly distributed on the bottom plate 13. A spiral groove plate is formed on the spiral groove seat 13, and a spiral groove 11 is formed on the spiral groove plate. Three pin shafts 12 are integrally formed on the inner wall of the rotating seat 7, and each pin shaft 12 corresponds to a spiral groove 11, and the pin shaft 12 moves in the spiral groove 11.

[0027] like Figure 4 and 5 As shown, a cavity 19 concave upward is formed on the base plate 13, and a pressing plate 2 is installed at the bottom of the cavity. The pressing plate 2 is located on the side of the grinding disc motor 1 of the base plate. A threaded hole is provided on the pressing plate 2, and a bolt 18 is fixed in the threaded hole. The other end of the bolt 18 passes through the base plate 13 and is clamped on the positioning plate 9 of the rotating seat 7. A compression spring 17 is connected to the outer sleeve of the bolt 18, and one end of the compression spring 17 abuts against the top of the cavity 19, and the other end of the compression spring 17 abuts against the pressing plate 2. A positioning groove 21 is provided on the positioning plate 9, and the end of the bolt is clamped in the positioning groove. Under normal conditions, the compression spring is in a compressed state, and the bolt 18 is subjected to the tension of the compression spring 17 to press the positioning plate 9 against the base plate 13, that is, the position of the rotating seat is fixed, so that the rotating seat cannot move, thereby working stably. When the rotating seat needs to be rotated, the pressing plate 2 is pressed, the compression spring is further compressed, the bolt 18 extends upward, and the bolt 18 escapes from the positioning groove 21, so that the rotating seat 7 can rotate freely without the action of the clamping force.

[0028] like Figure 6As shown, the rotating seat 7 is annular, and the rotating seat 7 is coaxially arranged with the base 14. An annular brush card groove 20 is provided on the upper end surface of the rotating seat 7. Three integrally formed pins 12 are evenly distributed on the inner wall of the rotating seat 7, and the pins 12 move in the spiral groove 11 to realize the rising of the rotating seat 7 relative to the bottom plate 13. A positioning plate 9 is also integrally formed on the inner wall of the rotating seat 7, and the positioning plate 9 extends toward the center. The positioning plate 9 is provided with three continuously connected positioning grooves 21, and the notches of the positioning grooves 21 are inclined inclined surfaces, which are convenient for the positioning and installation of the ends of the bolts 18. The three continuous positioning grooves 21 can divide the rotation of the rotating seat into three gears, and the bolts are fixed in different positioning grooves in different gears. As the rotating seat 7 rotates, the ends of the bolts 18 are clamped in different positioning grooves 21 to position the rotating seat 7. Of course, the bolts can also be replaced by pins or countersunk screws, etc., and it is only necessary to connect the pressing plate 2 with the positioning plate 9 to ensure that the ends of the pins or countersunk screws are located in the positioning grooves.

[0029] At the same time, an upwardly protruding inclined groove 15 is formed on the upper end surface of the rotating seat 7, and the inclined groove 15 is in a stepped shape. Figure 7 As shown, a sloped protrusion 23 cooperating with the sloped groove is provided on the base 14, and the sloped protrusion 23 is in a stepped shape, and the steps are in a sloped shape, with two steps, divided into three levels.

[0030] When in use, the grinding disc 6 is flush with the brush 5. After a period of use, the brush 5 is worn out. The toggling protrusion 25 is turned to drive the rotating seat 7 to rotate. The pin 12 on the rotating seat 7 moves upward along the spiral groove 11 as the rotating seat rotates, thereby driving the rotating seat 7 to move upward relative to the bottom plate 13. At the same time, the cooperation between the inclined protrusion and the inclined groove between the base 14 and the rotating seat 7 provides auxiliary power for the rotation of the rotating seat. Different stepped inclined surfaces are different gears, one step is one gear, and the adjustment of the brush 5 of the utility model has three gears. After rotating in place, the bolt 18 of the bottom plate is located in different positioning grooves 21 according to the rotation distance, thereby realizing the positioning of the rotating seat 7.

[0031] Embodiment 2:

[0032] Different from the first embodiment, the grinding disc cover formed by the bottom plate and the base is integrally formed.

[0033] The specific embodiments described herein are merely examples of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A head structure of a wall grinding machine, comprising a grinding disc cover, wherein a grinding disc is arranged inside the grinding disc cover, characterized in that: The grinding wheel cover includes a bottom plate and a base, a rotating seat is provided on the base, a brush slot is provided on the rotating seat, and a brush ring is installed in the brush slot; a brush adjustment structure is provided between the rotating seat and the base, the brush adjustment structure includes a positioning locking member and a lifting member, the lifting member drives the rotating seat to rise and fall and then fixes the position of the rotating seat through the positioning locking member; the lifting member includes a pin shaft and a spiral groove, the pin shaft is fixed on the inner side wall of the rotating seat, the spiral groove is installed on the spiral groove seat, and the spiral groove seat is fixed on the bottom plate.

2. The head structure of a wall grinding machine according to claim 1, characterized in that: The lifting member further comprises a plurality of inclined surface protrusions evenly distributed on the base, and an inclined surface groove cooperating with the inclined surface protrusions is arranged on the rotating seat.

3. The head structure of a wall grinding machine according to claim 2, characterized in that: The inclined surface protrusion is in the shape of an inclined step.

4. A head structure of a wall grinding machine according to any one of claims 1 to 3, characterized in that: The positioning locking member includes a positioning plate fixed on the inner wall of the rotating seat, 2-3 positioning grooves are opened on the positioning plate, an upwardly concave cavity is provided on the bottom plate, a compression spring is installed in the cavity, a pressing plate is provided under the cavity, one end of the compression spring abuts against the upper wall of the cavity, and the other end of the compression spring abuts against the pressing plate, a positioning shaft is fixed on the pressing plate, one end of the positioning shaft is located in the positioning groove, and the compression spring is located outside the positioning shaft.

5. A head structure of a wall grinding machine according to any one of claims 1 to 3, characterized in that: There are three lifting members, which are evenly distributed on the inner side of the rotating seat.

6. A head structure of a wall grinding machine according to any one of claims 1 to 3, characterized in that: A stopper protrusion is arranged on the inner wall of the brush clamping groove of the rotating seat, and the upper surface of the stopper protrusion is an inclined surface, which is inclined from the groove wall to the inside of the groove.

7. A head structure of a wall grinding machine according to any one of claims 1 to 3, characterized in that: The rotating seat and the base are coaxial annular bodies, a lamp ring is fixed on the base, and the base is fixed on the bottom plate by bolts.

8. A head structure of a wall grinding machine according to any one of claims 1 to 3, characterized in that: The base and the bottom plate are integrally formed.

9. A head structure of a wall grinding machine according to any one of claims 1 to 3, characterized in that: The rotating seat is provided with a toggle protrusion for toggle the rotating seat to rotate.

Images