Rust removal polisher and method for removing rust, strengthening hardness, chiseling and shoveling wall skin

Abstract

The derusting polisher comprises a barrel and a brush nail assembly, a hollow circular inner cavity is formed in the middle of the barrel, a positioning inner hole is formed in one end of the barrel in the inner hole direction, the inner hole of the positioning inner hole is smaller than the inner hole of the inner cavity, and the brush nail end of the brush nail assembly enters and penetrates through the positioning inner hole from the barrel. The plane end of the brush nail assembly is located in the inner cavity of the barrel, and a large spring is installed between the plane end of the brush nail assembly and the positioning inner hole. The device has the beneficial effects that the device size is small, rust removal, metal surface hardness strengthening, chiseling and wall skin shoveling can be carried out on any corner, an electric tool or a pneumatic tool can be used as a power source, the device cost is low, the danger of rust removal of an angle grinder in the market is avoided, and high environmental pollution caused by chemical rust removal is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of hardware tools, in particular to a rust removal grinder and a method for removing rust by brushing nails, strengthening surface hardness, chiseling and scraping wall skin. Background Art

[0002] Metal rust removal is divided into physical rust removal, chemical rust removal and electrochemical rust removal. Among them, physical rust removal in the current market basically uses the circular grinding disc and wire wheel (a large amount of steel wire) of the angle grinder to grind the metal surface and grind off the rust on the metal surface. However, the rust removal efficiency is low and it cannot adapt to metals of different shapes, especially the corners of the metal. At the same time, the angle grinder is very dangerous to use. A large number of people are injured by angle grinders every year.

[0003] In construction sites, industrial installations, home decoration and other places, it is often necessary to scrape off walls, roughen reinforced concrete, roughen walls before tiling, and remove rust from rusted steel bars.

[0004] Metal surface hardening usually uses a shot peening machine to harden the metal surface, causing plastic deformation on the surface of the metal part, thereby forming a strengthening layer of a certain thickness. Due to the existence of compressive stress on the surface of the part, when the part is under load, part of the stress can be offset, thereby improving the fatigue strength of the part. However, most machinery factories do not have shot peening machines on site, and shot peening machines are expensive, large in size, and have environmental pollution problems. Therefore, there is also a need for a tool that can remove rust from the surfaces of metal parts of different shapes, harden the metal surface while removing rust, and is cheap, small in size, and easy to carry. Summary of the invention

[0005] In order to overcome the shortcomings of the background technology, the present invention provides a rust removing grinder.

[0006] The technical solution of the present invention is: comprising a cylinder and a brush nail assembly, wherein a hollow circular inner cavity is provided in the middle of the cylinder, a positioning inner hole is provided at one end of the cylinder in the direction of the inner hole, the inner hole of the positioning inner hole is smaller than the inner hole of the inner cavity, the brush nail end of the brush nail assembly enters from the cylinder through the positioning inner hole, the plane end of the brush nail assembly is located in the inner cavity of the cylinder, and a large spring is installed between the plane end of the brush nail assembly and the positioning inner hole; A drill shank is also installed in the inner cavity, and a drill shank limiting assembly is installed at the other end of the inner cavity where the inner hole is positioned. An inner hole is arranged in the middle of the drill shank limiting assembly, and the shank end of the drill shank passes through the inner hole of the drill shank limiting assembly and extends to the outside. A round table is arranged on the other side of the shank end of the drill shank, and a small spring is installed between the round table of the drill shank and the drill shank limiting assembly. The flat end of the brush nail assembly and the round table of the drill shank are in contact with each other under the action of the large spring and the small spring. The handle end of the drill handle is connected to a power device, which may be an electric tool such as an electric hammer, an electric drill, an impact drill, an electric pick, or an air tool such as an air hammer or an air drill that uses an air source as power.

[0007] Preferably, the brush nail assembly consists of a brush nail and a brush nail seat, the brush nail seat is provided with a first through hole, one end of the brush nail is provided with a brush nail head in the shape of a circular boss, the other end of the brush nail passes through the first through hole and extends to the outside of the cylinder, the diameter of the brush nail head is greater than the diameter of the brush nail body, and the diameter of the brush nail head is greater than the inner hole diameter of the first through hole.

[0008] Preferably, the number of the brush nails is ≥2, the number of the first through holes on the brush nail seat is ≥2, and the multiple brush nails and the multiple first through holes cooperate with each other so that the brush nail assembly has multiple working surfaces.

[0009] Preferably, the first through hole is provided with a countersunk hole matching the size of the brush nail head at the end close to the brush nail head.

[0010] Preferably, a first chamfer is provided between the brush nail head and the brush nail body, and a second chamfer is provided at the countersunk hole of the first through hole, and the first chamfer and the second chamfer match each other.

[0011] Preferably, the drill shank limiting assembly is composed of a drill shank positioning sleeve and an elastic retaining ring, a center hole is provided in the middle of the drill shank positioning sleeve, and the center hole is clearance-matched with the drill shank body.

[0012] Preferably, the drill handle positioning sleeve is provided with a spring mounting boss at the end close to the small spring, the drill handle is provided with a circular contact plate at the end close to the brush nail assembly, the contact plate is provided with a positioning recess at the end close to the brush nail assembly, and the planar end of the brush nail assembly is located in the positioning recess.

[0013] Preferably, a vent is provided on the cylinder, and a handle is installed on the cylinder at a position perpendicular to the center line of the inner cavity.

[0014] Preferably, the drill shank, drill shank positioning sleeve and brush nail are all made of high-strength and high-wear-resistant materials. The drill shank, drill shank positioning sleeve and brush nail are all made of 40Cr material. The drill shank, drill shank positioning sleeve and brush nail can also be heat-treated, such as quenching, tempering treatment, and even nitriding treatment, so as to improve the strength, toughness and wear resistance of the drill shank, drill shank positioning sleeve and brush nail.

[0015] The present invention provides a method for removing rust, strengthening surface hardness, chiseling and scraping wall skin by brush nails, and the specific steps are as follows: 1. The handle end 31 of the drill handle 3 is connected through a power device, and the drill handle 3 and the brush nail assembly are in contact with each other under the action of the large spring 7 and the small spring 8; 2. Start the power device to drive the drill handle 3 to rotate or move forward and backward while rotating; 3. When the drill handle 3 rotates, the brush nail assembly will be driven to rotate through friction; 4. Place a rust removal grinder on the surface of the object to be processed, and then the brush nail end 101 of the brush nail assembly contacts the surface of the object to be processed, and the brush nail end 101 of the brush nail assembly will keep rubbing the surface of the object to be processed; 5. Because the friction between the brush nail end 101 and the surface of the object to be processed is not uniform, the brush nail end 101 of the brush nail assembly will temporarily leave the surface of the object to be processed; 6. The brush nail end 101 of the brush nail assembly contacts the surface of the object to be processed again; 7. Repeat steps 4 to 6 until the surface rust of the object to be treated is removed, the metal surface hardness is strengthened, the cement is roughened, or the wall skin is scraped off.

[0016] The beneficial effects of the present invention are that the equipment is small in size and can be used to remove rust from any corner, strengthen the hardness of the metal surface, chisel roughness, and scrape off the wall. Electric tools or pneumatic tools can be used as power sources. The equipment cost is low, and the danger of rust removal with angle grinders on the market is avoided, and there is no high environmental pollution caused by chemical rust removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1-Figure 3 It is a structural schematic diagram of the present invention.

[0018] Figure 4-Figure 5 Exploded view of the present invention Figure 6-Figure 8 It is a schematic structural diagram of the cylinder of the present invention.

[0019] Figure 9-10 It is a structural schematic diagram of the nail brush holder of the present invention.

[0020] Fig.11 for Fig.10 Half section view.

[0021] Fig.12 This is a schematic structural diagram of a first embodiment of the brush nail of the present invention.

[0022] Fig.13 It is a schematic structural diagram of a second embodiment of the nail brushing method of the present invention.

[0023] Fig.14 It is a schematic structural diagram of a first embodiment of a brush nail holder and a brush nail of the present invention.

[0024] Fig.15 It is a structural schematic diagram of another second embodiment of the brush nail holder and a brush nail of the present invention.

[0025] Figure 1-Figure 15In the figure, 1. cylinder, 11. positioning inner hole, 12. inner cavity, 13. vent, 2. handle, 3. drill shank, 31. shank end, 32. contact plate, 321. positioning recess, 4. drill shank positioning sleeve, 41. center hole, 42. spring mounting boss, 5. elastic retaining ring, 6. brush nail, 40Cr material, 61. brush nail head, 62. first chamfer, 63. working surface, 7. large spring, 8. small spring, 9. brush nail seat, 91. first through hole, 92. countersunk hole, 93. second chamfer, 101. brush nail end, 102. plane end, 111. round table. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are further described below with reference to the accompanying drawings: like Figure 1-Figure 15 As shown, this embodiment provides a rust removal grinder, including a barrel 1 and a brush nail assembly, wherein a hollow circular inner cavity 12 is provided in the middle of the barrel 1, and a positioning inner hole 11 is provided at one end of the barrel 1 toward the inner hole direction, wherein the inner hole of the positioning inner hole 11 is smaller than the inner hole of the inner cavity 12, and a brush nail end 101 of the brush nail assembly enters from the barrel 1 through the positioning inner hole 11, and a plane end 102 of the brush nail assembly is located in the inner cavity 12 of the barrel 1, and a large spring 7 is installed between the plane end 102 of the brush nail assembly and the positioning inner hole 11; the positioning inner hole 11 prevents the brush nail assembly from escaping from the end of the positioning inner hole 11, and the positioning inner hole 11 is also convenient for fixing one end of the large spring 7, and the brush nail assembly can perform linear reciprocating motion and rotational motion along the center line direction of the barrel 1.

[0027] A drill shank 3 is also installed in the inner cavity 12, and a drill shank limiting assembly is installed at the other end of the inner cavity 12 at the positioning inner hole 11. An inner hole is provided in the middle of the drill shank limiting assembly, and the shank end 31 of the drill shank 3 extends to the outside through the inner hole of the drill shank limiting assembly. The drill shank 3 is provided with a round table 111 on the other side of the shank end 31, and a small spring 8 is installed between the round table 111 of the drill shank 3 and the drill shank limiting assembly. The flat end 102 of the brush nail assembly and the round table 111 of the drill shank 3 are respectively in contact with each other under the action of the large spring 7 and the small spring 8; the drill shank 3 can perform linear motion and rotational motion in the inner hole in the middle of the drill shank limiting assembly.

[0028] The handle end 31 of the drill handle 3 is connected to a power device, which can be an electric tool such as an electric hammer, an electric drill, an electric impact drill, an electric pick, etc. The power device can also be a pneumatic tool such as an air hammer and an air drill that uses an air source as a power source. As long as it can drive the drill handle 3 to rotate or a device that can impact and rotate at the same time, such as an electric impact drill, it can be used.

[0029] The handle end 31 of the drill handle 3 can be provided with any connection mode of hardware tools such as four grooves, five grooves, square grooves, round grooves, etc., so as to facilitate universal and quick connection with equipment such as electric drills.

[0030] Since the brush nail end 101 of the brush nail assembly is constantly rubbing and impacting with the workpiece to be processed, the brush nail end 101 is constantly worn. Once the brush nail end is worn too short, the entire brush nail assembly must be replaced. In order to save costs, preferably, the brush nail assembly is composed of a brush nail 6 and a brush nail seat 9. The brush nail seat 9 is provided with a first through hole 91. One end of the brush nail 6 is provided with a brush nail head 61 in the shape of a circular boss. The other end of the brush nail 6 extends through the first through hole 91 to the outside of the cylinder 1. The diameter of the brush nail head 61 is greater than the diameter of the brush nail 6 body, and the diameter of the brush nail head 61 is greater than the inner hole diameter of the first through hole 91. In this way, after the brush nail 6 is worn short, only the brush nail 6 can be replaced. In addition, the needle-shaped brush nail 6 can be directly cut from a bar, and the brush nail head 61 can be directly hot-squatted and cold-forged, which has the advantages of low cost and fast processing speed.

[0031] Since the efficiency of a single brush nail 6 is too low, preferably, the number of the brush nails 6 is ≥ 2, the number of the first through holes 91 on the brush nail seat 9 is ≥ 2, and the multiple brush nails 6 and the multiple first through holes 91 cooperate with each other so that the brush nail assembly has multiple working surfaces 63. In this way, the present invention has multiple brush nails 6, and different numbers of brush nails 6 can be set to adapt to different specifications of the present invention.

[0032] When the device of the present invention is working, the brush nail head 61 and the contact plate 32 of the drill handle 3 will frequently rub and impact each other. In order to increase the service life of the brush nail head 61 and make the service life of the brush nail head 61 longer than the service life of the working surface 63 of the brush nail 6, preferably, the first through hole 91 is provided with a countersunk hole 92 whose size matches the brush nail head 61 at the end close to the brush nail head 61. In this way, the contact plate 32 of the drill handle 3 mainly contacts and rubs with the brush nail seat 9.

[0033] In order to make the brush nail 6 have a self-centering function during installation and operation, preferably, a first chamfer 62 is further provided between the brush nail head 61 and the brush nail 6 body, and a second chamfer 93 is provided at the counterbore 92 of the first through hole 91, and the first chamfer 62 and the second chamfer 93 match each other. In this way, the second chamfer 93 facilitates the installation of the brush nail 6, and when the brush nail 6 is installed to the bottom, the second chamfer 93 matches the first chamfer 62 to keep a certain concentricity of the brush nail 6.

[0034] In order to facilitate the installation of the drill handle limiting assembly, the present invention provides a specific implementation method. Preferably, the drill handle limiting assembly is composed of a drill handle positioning sleeve 4 and an elastic retaining ring 5. A center hole 41 is provided in the middle of the drill handle positioning sleeve 4. The center hole 41 is clearance-matched with the body of the drill handle 3. The elastic retaining ring 5 is preferably a hole elastic retaining ring, and the material is preferably made of 65Mn material and blackened or made of 304 stainless steel.

[0035] In order to better install and fix the small spring 8, preferably, the end of the drill handle positioning sleeve 4 close to the small spring 8 is provided with a spring installation boss 42, the end of the drill handle 3 close to the brush nail assembly is provided with a circular contact plate 32, the end of the contact plate 32 close to the brush nail assembly is provided with a positioning recess 321, and the flat end 102 of the brush nail assembly is located in the positioning recess 321. In addition, a large arc 33 is provided between the end of the contact plate 32 close to the handle end 31 and the body of the drill handle 3, and the large arc 33 is also convenient for the small spring 8 to be installed and self-centering during use.

[0036] Since the drill handle 3 and the brush nail assembly will rotate and rub at high speed when the device of the present invention is working, a certain amount of heat will inevitably accumulate during long-term work. In order to improve the service life of the drill handle 3 and the brush nail assembly, preferably, the barrel 1 is provided with a vent 13, and the barrel 1 is provided with a handle 2 at a position perpendicular to the center line of the inner cavity 12. The handle 2 and the barrel 1 can be connected by threads, and the handle 2 can be made of plastic, such as ABS plastic, etc. Of course, the thread at the connection between the handle 2 and the barrel 1 is preferably made of metal material, that is, the commonly used standard hexagonal bolts and the handle 2 are integrally formed by plastic injection molding. When the device is working, air will enter and exit the vent 13, thereby taking away the accumulated heat in the inner cavity 12, improving the service life of the device and increasing the maximum continuous working time. At the same time, the handle 2 is convenient for the operator to hold the electric rotary or impact drill in one hand and the handle 2 in the other hand, so as to better control the grinding direction and grinding position of the device of the present invention.

[0037] The vent 13 can be in the shape of a round hole, a long remote hole, a square hole, etc. In addition, the cylinder 1 can be cast, cold-forged, or hot-forged into a blank and then processed. This can greatly reduce raw materials and processing allowances, thereby reducing mass production costs. The vent and shape can be directly formed when the blank is formed.

[0038] In order to improve the life of the drill shank 3, the drill shank positioning sleeve 4 and the brush nail 6, preferably, the drill shank 3, the drill shank positioning sleeve 4 and the brush nail 6 are all made of high-strength and high-wear-resistant materials, and the drill shank 3, the drill shank positioning sleeve 4 and the brush nail 6 are all made of 40Cr material. The drill shank 3, the drill shank positioning sleeve 4 and the brush nail 6 can also be heat-treated, such as quenching, tempering treatment, and even nitriding treatment, so as to improve the strength, toughness and wear resistance of the drill shank 3, the drill shank positioning sleeve 4 and the brush nail 6. The 40Cr material has the advantages of low price, high strength, mature heat treatment process, and nitriding treatment. Of course, other materials such as 65Mn and 45# steel can also be used.

[0039] The physical rust removal methods currently on the market, as described in the background technology, have different disadvantages. The applicant has created a new method for rust removal, metal surface hardness enhancement, cement roughening, and wall scraping, without the huge danger of angle grinders. Figure 1-Figure 15As shown, the present invention provides a method for removing rust, strengthening surface hardness, chiseling and scraping wall skin by brush nails, and the specific steps are as follows: 1. The handle end 31 of the drill handle 3 is connected through a power device, and the drill handle 3 and the brush nail assembly are in contact with each other under the action of the large spring 7 and the small spring 8; 2. Start the power device to drive the drill handle 3 to rotate or move forward and backward while rotating; 3. When the drill handle 3 rotates, the brush nail assembly will be driven to rotate through friction; 4. Place a rust removal grinder on the surface of the object to be processed, and then the brush nail end 101 of the brush nail assembly contacts the surface of the object to be processed, and the brush nail end 101 of the brush nail assembly will keep rubbing the surface of the object to be processed; 5. Because the friction between the brush nail end 101 and the surface of the object to be processed is not uniform, the brush nail end 101 of the brush nail assembly will temporarily leave the surface of the object to be processed; 6. The brush nail end 101 of the brush nail assembly contacts the surface of the object to be processed again; 7. Repeat steps 4 to 6 until the surface rust of the object to be treated is removed, the metal surface hardness is strengthened, the cement is roughened, or the wall skin is scraped off.

[0040] Since the drill handle 3, the brush nail 6 and the brush nail seat 9 are not fixed together, but driven to rotate by friction, even if the brush nail 6 is stuck, the drill handle 3 will not be stuck and overloaded, so hand injuries are not likely to occur. This is similar to the transmission method of a car clutch, which prevents overload of power equipment such as motors.

[0041] The rotation of the brush nail 6 can remove rust on the metal surface, roughen the cement floor, and directly scrape off the wall skin. At the same time, the intermittent impact and rotation of the brush nail 6 can also improve the hardness of the metal surface.

[0042] This embodiment should not be regarded as a limitation of the invention, but any improvement based on the spirit of the invention should be within the protection scope of the invention.

Claims

1. A rust removal grinder, characterized in that: It comprises a cylinder (1) and a brush nail assembly, wherein a hollow circular inner cavity (12) is provided in the middle of the cylinder (1), a positioning inner hole (11) is provided at one end of the cylinder (1) in the direction of the inner hole, the inner hole of the positioning inner hole (11) is smaller than the inner hole of the inner cavity (12), the brush nail end (101) of the brush nail assembly enters from the cylinder (1) and passes through the positioning inner hole (11), the flat end (102) of the brush nail assembly is located in the inner cavity (12) of the cylinder (1), and a large spring (7) is installed between the flat end (102) of the brush nail assembly and the positioning inner hole (11); A drill shank (3) is also installed in the inner cavity (12); a drill shank limiting assembly is installed at the other end of the inner cavity (12) of the positioning inner hole (11); an inner hole is provided in the middle of the drill shank limiting assembly; a shank end (31) of the drill shank (3) passes through the inner hole of the drill shank limiting assembly and extends to the outside; a round table (111) is provided on the other side of the shank end (31) of the drill shank (3); a small spring (8) is installed between the round table (111) of the drill shank (3) and the drill shank limiting assembly; the flat end (102) of the brush nail assembly and the round table (111) of the drill shank (3) are in contact with each other under the action of the large spring (7) and the small spring (8); The shank end (31) of the drill shank (3) is connected to a power device.

2. A rust removal grinder according to claim 1, characterized in that: The brush nail assembly comprises a brush nail (6) and a brush nail seat (9); the brush nail seat (9) is provided with a first through hole (91); one end of the brush nail (6) is provided with a brush nail head (61) in the shape of a circular boss; the other end of the brush nail (6) passes through the first through hole (91) and extends to the outside of the cylinder (1); the diameter of the brush nail head (61) is greater than the diameter of the brush nail (6) body; and the diameter of the brush nail head (61) is greater than the inner hole diameter of the first through hole (91).

3. A rust removal grinder according to claim 2, characterized in that: The number of the brush nails (6) is ≥2, the number of the first through holes (91) on the brush nail seat (9) is ≥2, and the plurality of brush nails (6) and the plurality of first through holes (91) cooperate with each other so that the brush nail assembly has a plurality of working surfaces (63).

4. A rust removal grinder according to claim 2 or 3, characterized in that: The first through hole (91) is provided with a countersunk hole (92) whose size matches that of the brush nail head (61) at the end close to the brush nail head (61).

5. A rust removal grinder according to claim 4, characterized in that: A first chamfer (62) is further provided between the brush nail head (61) and the brush nail (6) body, and a second chamfer (93) is provided at the counterbore (92) of the first through hole (91), and the first chamfer (62) and the second chamfer (93) match each other.

6. A rust removal grinder according to claim 2, characterized in that: The drill shank limiting assembly is composed of a drill shank positioning sleeve (4) and an elastic retaining ring (5); a center hole (41) is provided in the middle of the drill shank positioning sleeve (4); and the center hole (41) is clearance-matched with the body of the drill shank (3).

7. A rust removal grinder according to claim 6, characterized in that: The end of the drill handle positioning sleeve (4) close to the small spring (8) is provided with a spring mounting boss (42), the end of the drill handle (3) close to the brush nail assembly is provided with a circular contact plate (32), the end of the contact plate (32) close to the brush nail assembly is provided with a positioning recess (321), and the plane end (102) of the brush nail assembly is located in the positioning recess (321).

8. The rust removal grinder according to claim 1, characterized in that: The cylinder (1) is provided with a vent (13), and the cylinder (1) is provided with a handle (2) at a position perpendicular to the center line of the inner cavity (12).

9. The rust removal grinder according to claim 1, characterized in that: The drill shank (3), the drill shank positioning sleeve (4) and the brush nail (6) are all made of high-strength and high-wear-resistant materials, and the drill shank (3), the drill shank positioning sleeve (4) and the brush nail (6) are all made of 40Cr material.

10. A method for removing rust, strengthening surface hardness, chiseling and scraping wall skin by brush nailing according to any one of claims 1 to 9, characterized in that: The specific steps are as follows: 1) connecting the handle end (31) of the drill handle (3) through a power device, wherein the drill handle (3) and the brush nail assembly are in contact with each other under the action of a large spring (7) and a small spring (8); 2) Starting the power device to drive the drill handle (3) to rotate or move forward and backward while rotating; 3) When the drill handle (3) rotates, the brush nail assembly is driven to rotate through friction; 4) placing a rust removal grinder on the surface of the object to be processed, and then bringing the brush nail end (101) of the brush nail assembly into contact with the surface of the object to be processed, and the brush nail end (101) of the brush nail assembly will continue to rub the surface of the object to be processed; 5) Because the friction between the brush nail end (101) and the surface of the object to be processed is not uniform, the brush nail end (101) of the brush nail assembly will temporarily leave the surface of the object to be processed; 6) The brush nail end (101) of the brush nail assembly contacts the surface of the object to be processed again; 7) Repeat steps 4 to 6 until the surface rust of the object to be treated is removed, the metal surface hardness is strengthened, the cement is roughened, or the wall skin is scraped off.

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