Rust removal polisher

Abstract

The utility model discloses a derusting polisher which comprises a barrel and a brush nail assembly, a hollow circular inner cavity is arranged in the middle of the barrel, a positioning inner hole is arranged at one end of the barrel towards 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 from the barrel and penetrates through the positioning inner hole. 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 utility model has the beneficial effects that the equipment is small in size, can be used for derusting any corner, strengthening the hardness of a metal surface, chiseling and shoveling off a wall skin, can use an electric tool or a pneumatic tool as a power source, is low in cost, avoids the danger of derusting by an angle grinder on the market, and also has no high environmental pollution caused by chemical derusting.

Description

Technical Field

[0001] This utility model relates to the field of hardware tool technology, specifically to a rust removal and polishing tool. Background Technology

[0002] Rust removal of metals is divided into physical rust removal, chemical rust removal, and electrochemical rust removal. Physical rust removal currently on the market mainly uses the circular grinding discs and wire wheels (with a large amount of steel wire) of angle grinders to grind the metal surface and remove the rust. 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, angle grinders are very dangerous to use, and a large number of people are injured by angle grinders every year.

[0003] In construction sites, commercial projects, and home renovations, it is often necessary to remove walls, roughen reinforced concrete, roughen walls before tiling, and remove rust from steel bars.

[0004] Metal surface hardening typically involves using shot peening machines to harden the metal surface, causing plastic deformation and forming a reinforced layer of a certain thickness. Due to the compressive stress on the surface of the part, this layer can offset some of the stress when the part is under load, thus improving its fatigue strength. However, most machine shops do not have shot peening machines, and these machines are expensive, bulky, and cause environmental pollution. Therefore, there is a need for a tool that can remove rust from metal parts of different shapes, harden the metal surface during rust removal, and is inexpensive, compact, and portable. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model provides a rust removal and polishing tool.

[0006] The technical solution of this utility model is as follows: it includes a cylindrical body and a brush nail assembly. The cylindrical body has a hollow circular inner cavity in the middle. One end of the cylindrical body has a positioning inner hole 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 cylindrical body and passes through the positioning inner hole. The flat end of the brush nail assembly is located in the inner cavity of the cylindrical body. A large spring is installed between the flat end of the brush nail assembly and the positioning inner hole.

[0007] A drill shank is also installed inside the inner cavity. A drill shank limiting component is installed at the other end of the positioning inner hole of the inner cavity. The drill shank limiting component has an inner hole in the middle. The shank end of the drill shank extends to the outside through the inner hole of the drill shank limiting component. A frustum is provided on the other side of the shank end of the drill shank. A small spring is installed between the frustum of the drill shank and the drill shank limiting component. The flat end of the brush nail component and the frustum of the drill shank are in contact with each other under the action of the large spring and the small spring, respectively.

[0008] The shank of the drill shank is connected to a power device, which can be an electric hammer, electric drill, impact drill, electric pick, or other power tools, or a pneumatic tool that uses an air source as its power source, such as an air hammer or air drill.

[0009] 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 extends through the first through hole 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 diameter of the first through hole.

[0010] Preferably, the number of brush nails is ≥2, the number of first through holes on the brush nail holder is ≥2, and the multiple brush nails and multiple first through holes cooperate with each other to make the brush nail assembly have multiple working surfaces.

[0011] Preferably, the first through hole has a countersunk hole at the end near the brush head that matches the size of the brush head.

[0012] Preferably, a first chamfer is provided between the brush head and the brush 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.

[0013] Preferably, the drill shank limiting assembly consists of a drill shank positioning sleeve and an elastic retaining ring, wherein the drill shank positioning sleeve has a central hole in the middle, and the central hole is clearance-fitted with the drill shank body.

[0014] Preferably, the drill shank positioning sleeve has a spring mounting boss at the end near the small spring, the drill shank has a circular contact plate at the end near the brush assembly, the contact plate has a positioning recess at the end near the brush assembly, and the flat end of the brush assembly is located in the positioning recess.

[0015] Preferably, the cylinder is provided with a vent, and a handle is installed on the cylinder at a position perpendicular to the center line of the inner cavity.

[0016] Preferably, the drill shank, drill shank positioning sleeve, and brush pin are all made of high-strength and high-wear-resistant materials. The drill shank, drill shank positioning sleeve, and brush pin are all made of 40Cr material. The drill shank, drill shank positioning sleeve, and brush pin can also be heat-treated, such as quenching, tempering, or even nitriding, thereby improving the strength, toughness, and wear resistance of the drill shank, drill shank positioning sleeve, and brush pin.

[0017] Preferably, the drill shank (3), drill shank positioning sleeve (4) and brush nail (6) are heat-treated to improve their strength and hardness.

[0018] The advantages of this invention are that the equipment is small in size, can remove rust from any corner, strengthen the hardness of metal surfaces, roughen and scrape off wall plaster, can be powered by electric or pneumatic tools, has low equipment cost, avoids the dangers of rust removal by angle grinders on the market, and does not have the high environmental pollution of chemical rust removal. Attached Figure Description

[0019] Figures 1-3 This is a schematic diagram of the structure of this utility model.

[0020] Figures 4-5 This is an exploded view of the present invention.

[0021] Figures 6-8 This is a schematic diagram of the structure of the cylindrical body of this utility model.

[0022] Figures 9-10 This is a schematic diagram of the structure of the brush nail holder of this utility model.

[0023] Figure 11 for Figure 10 A half-section view.

[0024] Figure 12 This is a schematic diagram of the first embodiment of the brush nail of this utility model.

[0025] Figure 13 This is a schematic diagram of the second embodiment of the brush nail of this utility model.

[0026] Figure 14 This is a schematic diagram of the first embodiment of the brush nail holder and a brush nail of the present invention.

[0027] Figure 15 This is a schematic diagram of a second embodiment of the brush nail holder and a brush nail of the present invention.

[0028] Figures 1-15 In the middle, 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. flat end, 111. frustum. Detailed Implementation

[0029] The embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0030] like Figures 1-15As shown, this embodiment provides a rust removal and polishing tool, including a cylinder 1 and a brush assembly. The cylinder 1 has a hollow circular inner cavity 12 in the middle. One end of the cylinder 1 has a positioning inner hole 11 facing inward. The inner diameter of the positioning inner hole 11 is smaller than the inner diameter of the inner cavity 12. The brush end 101 of the brush assembly enters from the cylinder 1 and passes through the positioning inner hole 11. The flat end 102 of the brush assembly is located inside the inner cavity 12 of the cylinder 1. A large spring 7 is installed between the flat end 102 of the brush assembly and the positioning inner hole 11. The positioning inner hole 11 prevents the brush assembly from coming out of the positioning inner hole 11. The positioning inner hole 11 also facilitates fixing one end of the large spring 7. The brush assembly can perform linear reciprocating motion and rotational motion along the center line of the cylinder 1.

[0031] A drill shank 3 is also installed inside the inner cavity 12. A drill shank limiting component is installed at the other end of the positioning inner hole 11 in the inner cavity 12. The drill shank limiting component has an inner hole in the middle. The shank end 31 of the drill shank 3 extends to the outside through the inner hole of the drill shank limiting component. A frustum 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 frustum 111 of the drill shank 3 and the drill shank limiting component. The flat end 102 of the brush nail component and the frustum 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, respectively. The drill shank 3 can make linear and rotational movements in the middle inner hole of the drill shank limiting component.

[0032] The shank end 31 of the drill shank 3 is connected to a power device. The power device can be an electric hammer, electric drill, electric impact drill, electric pick, or other power tools. It can also be a pneumatic tool that uses air as its power source, such as a pneumatic hammer or pneumatic drill. Any device that can drive the drill shank 3 to rotate or a device that can both impact and rotate, like an electric impact drill, is acceptable.

[0033] The shank 3 can be provided with any of the following hardware tool connection methods on the shank end 31: four-slot, five-slot, square slot, round slot, etc., to facilitate compatibility and quick connection with equipment such as electric drills.

[0034] Because the brush tip 101 of the brush assembly is constantly rubbed and impacted with the workpiece, the brush tip 101 is constantly worn down. Once it is worn too short, the entire brush assembly must be replaced. To save costs, preferably, the brush assembly consists of a brush tip 6 and a brush tip seat 9. The brush tip seat 9 is provided with a first through hole 91. One end of the brush tip 6 is provided with a circular boss-shaped brush tip head 61. The other end of the brush tip 6 extends through the first through hole 91 to the outside of the cylinder 1. The diameter of the brush tip head 61 is greater than the diameter of the brush tip body 6, and the diameter of the brush tip head 61 is greater than the inner diameter of the first through hole 91. In this way, when the brush tip 6 is worn down, only the brush tip 6 needs to be replaced. In addition, this needle-shaped brush tip 6 can be directly cut from bar stock and then hot-sinked and cold-forged to produce the brush tip head 61, which has the advantages of low cost and fast processing speed.

[0035] Since the efficiency of a single brush nail 6 is too low, preferably, the number of brush nails 6 is ≥2, and the number of first through holes 91 on the brush nail seat 9 is ≥2. The multiple brush nails 6 and the multiple first through holes 91 cooperate with each other to give the brush nail assembly 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 equipment.

[0036] Because the brush head 61 and the contact plate 32 of the drill shank 3 will frequently rub and impact each other during the operation of this device, in order to improve the service life of the brush head 61 and make its service life longer than that of the working surface 63 of the brush head 6, preferably, the first through hole 91 is provided with a countersunk hole 92 that matches the size of the brush head 61 at the end near the brush head 61. In this way, the contact plate 32 of the drill shank 3 mainly contacts and rubs against the brush head seat 9.

[0037] To enable the brush nail 6 to have a self-centering function during installation and operation, preferably, a first chamfer 62 is provided between the brush nail head 61 and the brush nail 6 body, and a second chamfer 93 is provided at the countersunk hole 92 of the first through hole 91. 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 fully installed, the matching of the second chamfer 93 and the first chamfer 62 ensures that the brush nail 6 maintains a certain degree of concentricity.

[0038] To facilitate the installation of the shank limiting component, this utility model provides a specific implementation method. Preferably, the drill shank limiting component consists of a drill shank positioning sleeve 4 and an elastic retaining ring 5. The drill shank positioning sleeve 4 has a central hole 41 in the middle, and the central hole 41 is clearance-fitted with the drill shank body 3. The elastic retaining ring 5 is preferably a hole-type elastic retaining ring, preferably made of 65Mn material with a blackening treatment or 304 stainless steel.

[0039] To facilitate better installation and fixation of the small spring 8, preferably, the drill shank positioning sleeve 4 has a spring mounting boss 42 near the small spring 8, and the drill shank 3 has a circular contact plate 32 near the brush assembly. The contact plate 32 has a positioning recess 321 near the brush assembly, and the flat end 102 of the brush assembly is located within the positioning recess 321. Furthermore, a large arc 33 is provided between the contact plate 32 near the shank end 31 and the drill shank 3 body, which also facilitates self-centering of the small spring 8 during installation and use.

[0040] Because the drill shank 3 and brush assembly rotate at high speed and rub against each other during operation, they will inevitably accumulate heat over time. To improve the lifespan of the drill shank 3 and brush assembly, preferably, the cylinder 1 is provided with a ventilation port 13. A handle 2 is installed on the cylinder 1 at a position perpendicular to the center line of the inner cavity 12. The handle 2 and the cylinder 1 can be connected by threads. The handle 2 can be made of plastic, such as ABS plastic. Of course, the thread at the connection between the handle 2 and the cylinder 1 is preferably made of metal, such as a standard hexagonal bolt, which is integrally molded with the handle 2 through plastic injection molding. During operation, air enters and exits through the ventilation port 13, thereby carrying away the heat accumulated in the inner cavity 12, improving the service life of the equipment and extending the maximum continuous working time. At the same time, the handle 2 allows the operator to hold the electric drill or impact drill with one hand and the handle 2 with the other, better controlling the grinding direction and position of the equipment.

[0041] The ventilation opening 13 can be in the shape of a round hole, a long hole, a square hole, etc. In addition, the cylinder 1 can be made into a blank by casting, cold heading, or hot heading and then processed. This can greatly reduce the raw materials and processing allowance, thereby reducing the cost of mass production. Its ventilation opening and shape can be formed directly in the blank.

[0042] To improve the lifespan of the drill shank 3, drill shank positioning sleeve 4, and brush pin 6, preferably, all three components are made of high-strength, high-wear-resistant materials, specifically 40Cr steel. These components can also undergo heat treatment, such as quenching, tempering, or even nitriding, to enhance their strength, toughness, and wear resistance. 40Cr steel offers advantages such as low cost, high strength, mature heat treatment processes, and the ability to undergo nitriding. Of course, other materials such as 65Mn and 45# steel can also be used.

[0043] Preferably, the drill shank 3, drill shank positioning sleeve 4, and brush nail 6 are heat-treated to improve their strength and hardness.

[0044] Current physical rust removal methods on the market, as described in the background section, have various drawbacks. The applicant has pioneered a new method for rust removal, metal surface hardening, cement roughening, and wall plaster removal, which eliminates the significant dangers associated with angle grinders. Figures 1-15 As shown, this utility model provides a method for removing rust, strengthening surface hardness, roughening, and scraping wall plaster using a brush nail, the specific steps of which are as follows:

[0045] 1. The drill shank 3 is connected to the shank end 31 via a power device, and the drill shank 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.

[0046] 2. Start the power unit to drive the drill shank 3 to rotate or move it back and forth while rotating it;

[0047] 3. When the drill shank 3 rotates, it will drive the brush nail assembly to rotate through friction.

[0048] 4. Place a rust remover on the surface of the object to be treated, and then the brush tip 101 of the brush assembly contacts the surface of the object to be treated. The brush tip 101 of the brush assembly will continuously rub against the surface of the object to be treated.

[0049] 5. Because the friction between the brush tip 101 and the surface of the object to be treated is not uniform, the brush tip 101 of the brush assembly will temporarily leave the surface of the object to be treated.

[0050] 6. The brush tip 101 of the brush assembly re-contacts the surface of the object to be treated;

[0051] 7. Repeat steps 4 to 6 until the rust on the surface of the object to be treated is removed, the hardness of the metal surface is strengthened, and the cement is roughened or the wall plaster is scraped off.

[0052] Since the drill shank 3 is not fixed to the brush nail 6 and brush nail seat 9, but is driven to rotate by friction, even if the brush nail 6 is stuck, it will not cause the drill shank 3 to be stuck and overloaded. This makes it less likely to cause hand injuries. It is similar to the transmission method of a car clutch to prevent overload of motors and other power equipment.

[0053] The rotation of the brush nail 6 removes rust from metal surfaces, roughens cement floors, and scrapes off wall plaster. At the same time, the intermittent impact and rotation of the brush nail 6 can also increase the hardness of metal surfaces.

[0054] This embodiment should not be regarded as a limitation of the utility model, but any improvement made based on the spirit of the utility model should be within the protection scope of the utility model.

Claims

1. A rust removal sander characterized by: The utility model provides a brush and drill handle assembly, including cylinder (1) and brush pin subassembly, hollow circular inner chamber (12) is equipped with in the cylinder (1) middle, the one end of cylinder (1) is equipped with the positioning hole (11) to the hole direction, the hole of positioning hole (11) is smaller than the hole of inner chamber (12), the brush pin end (101) of brush pin subassembly enters from cylinder (1) and passes through positioning hole (11), the plane end (102) of brush pin subassembly is located in the inner chamber (12) of cylinder (1), and the plane end (102) of brush pin subassembly is installed with big spring (7) between positioning hole (11), The inner chamber (12) is also installed with drill handle (3), the inner chamber (12) is installed with drill handle limiting assembly at the other end of positioning hole (11), the middle of drill handle limiting assembly is equipped with hole, the handle end (31) of drill handle (3) extends to the outside through the hole of drill handle limiting assembly, the circular table (111) of drill handle (3) is equipped with on the other side of handle end (31), the circular table (111) of drill handle (3) is installed with small spring (8) between drill handle limiting assembly, and the plane end (102) of brush pin subassembly and the circular table (111) of drill handle (3) are contacted each other under the action of big spring (7) and small spring (8) respectively. The handle end (31) of drill handle (3) is connected with power equipment.

2. A rust removal polisher according to claim 1, characterized in that: The brush pin subassembly is composed of brush pin (6) and brush pin seat (9), the first through hole (91) is equipped on brush pin seat (9), one end of brush pin (6) is equipped with brush pin head (61) of circular boss shape, the other end of brush pin (6) extends to the outside of cylinder (1) through first through hole (91), the diameter of brush pin head (61) is greater than the diameter of brush pin (6) body, and the diameter of brush pin head (61) is greater than the hole diameter of first through hole (91).

3. A rust remover polisher according to claim 2, characterized in that: The number of brush pin (6) is greater than or equal to 2, the number of first through hole (91) on brush pin seat (9) is greater than or equal to 2, and the plurality of brush pins (6) and the plurality of first through holes (91) are matched to make the brush pin subassembly have a plurality of working surfaces (63).

4. A rust removal polisher according to claim 2 or 3, characterized in that: The first through hole (91) is equipped with counterbore (92) with the size matched with brush pin head (61) at the end close to brush pin head (61).

5. A rust remover polisher according to claim 4, characterized in that: The first chamfer (62) is further equipped between brush pin head (61) and brush pin (6) body, the second chamfer (93) is equipped at counterbore (92) of first through hole (91), and the first chamfer (62) and the second chamfer (93) are matched.

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

7. A rust remover polisher according to claim 6, characterized in that: The spring mounting boss (42) is equipped at the end close to small spring (8) of drill handle positioning sleeve (4), the circular contact disc (32) is equipped at the end close to brush pin subassembly of drill handle (3), the positioning recess (321) is equipped at the end close to brush pin subassembly of contact disc (32), and the plane end (102) of brush pin subassembly is located in positioning recess (321).

8. A rust removal sander as defined in claim 1, wherein: The barrel (1) is provided with a ventilation opening (13), and the barrel (1) is provided with a handle (2) at a position perpendicular to the center line of the inner cavity (12).

9. A rust scrapper according to claim 1, wherein: The drill handle (3), the drill handle positioning sleeve (4) and the brush pin (6) are made of high-strength and high-wear-resistant materials, and the drill handle (3), the drill handle positioning sleeve (4) and the brush pin (6) are made of 40Cr material.

10. A rust remover polisher according to claim 9, characterized in that: The drill handle (3), the drill handle positioning sleeve (4) and the brush pin (6) are subjected to heat treatment to improve their strength and hardness.

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