Angle grinder

Abstract

The utility model discloses an angle grinder which comprises an angle grinder body, a grinding assembly is installed at the bottom of the angle grinder body, an installation ring is fixed to the bottom of the angle grinder body, a protection assembly is installed on the installation ring through a quick release part, the protection assembly comprises a protection cover, a clamping ring and a containing ring, and the clamping ring is movably connected to the inner wall of the circumference of the containing ring. The protective cover is fixed to the bottom of the clamping ring, the quick release part comprises a support, a limiting frame and a sliding frame, the support is welded to the outer wall of the top of the containing ring, the limiting frame is welded to the inner wall of one side of the support, and the sliding frame is movably connected with the limiting frame. The protective cover can be rapidly installed on the installation ring, the threaded column is driven by the rotary knob to transversely move, the inserting plate is inserted into the inserting groove, mechanical locking is achieved, pressure is applied after the sliding frame is attached to the outer wall of the clamping ring, clamping of the limiting toothed plate and the rack is achieved, double locking is formed, the protective cover is effectively prevented from loosening or shifting in high-speed operation, and the service life of the protective cover is prolonged. And the safety is obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of angle grinder technology, and in particular to an angle grinder. Background Technology

[0002] Angle grinders, as a common power tool, are widely used in metal processing, wood processing, stone cutting and other fields. Their main function is to grind the surface of the workpiece by using a high-speed rotating grinding wheel. Traditional angle grinder designs often focus on grinding efficiency and power output, but they have certain shortcomings in terms of safety and ease of operation.

[0003] In terms of safety, traditional angle grinders can cause debris to fly out during grinding, such as when the grinding wheel is rotating at high speed, posing a potential threat to operators. Although some angle grinders are equipped with protective covers, the installation and removal of these covers are often cumbersome and complicated, making it inconvenient for operators to quickly replace or adjust them.

[0004] To address the aforementioned issues, an angle grinder that enhances safety is needed. This design effectively improves the safety and ease of use of angle grinders, meets the needs of different operating scenarios, improves the overall performance of angle grinders, and provides operators with a safer and more convenient operating experience. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing an angle grinder.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An angle grinder includes a main body with a mounting ring fixed to its bottom. A protective assembly is mounted on the mounting ring via a quick-release mechanism. The protective assembly includes a protective cover, a retaining ring, and a receiving ring. The quick-release mechanism includes a bracket, a limiting frame, and a sliding frame. The bracket is welded to the top outer wall of the receiving ring, the limiting frame is welded to the inner wall of one side of the bracket, and the sliding frame is movably connected to the limiting frame. A connecting plate is welded to the top of the sliding frame, and an insert plate is welded to one side of the connecting plate. A slot adapted to the insert plate is formed on the outer circumference of the mounting ring. A threaded post is threaded to one end of the bracket, one end of which is movably connected to the sliding frame, and a knob is welded to the other end.

[0008] As a further improvement of this utility model: the retaining ring is movably connected to the inner wall of the circumference of the receiving ring, and the protective cover is fixed to the bottom of the retaining ring.

[0009] As a further embodiment of this utility model: a grinding component is installed at the bottom of the angle grinder body. The grinding component includes a stud and a support plate. The support plate is connected to the output end of the motor installed inside the angle grinder body through a coupling. The stud is fixed to the bottom of the support plate. A grinding wheel is sleeved on the outer wall of the stud. A locking nut is threaded on the outer circumference of the stud.

[0010] As a further embodiment of this utility model: a gripping assembly is installed on the side wall of the angle grinder body. The gripping assembly includes a limiting shaft, a rotating block, and a U-shaped frame. The U-shaped frame is fixed to the side wall of the angle grinder body. The limiting shaft is movably connected between the top and bottom of the U-shaped frame. The rotating block is fixed to the outer circumference of the limiting shaft. A handle is welded to one side of the rotating block.

[0011] As a further embodiment of this utility model: a limiting component is installed on the top of the U-shaped frame. The limiting component includes a spring, an L-shaped plate, and a T-shaped rod. The L-shaped plate is welded to the top of the U-shaped frame. The T-shaped rod is movably connected to the through hole of the L-shaped plate. The two ends of the spring are respectively fixed to the top of the T-shaped rod and the top of the L-shaped plate. A toothed ring that engages with the limiting shaft is welded to the bottom of the T-shaped rod.

[0012] As a further improvement of this utility model: the outer circumference of the toothed ring is provided with teeth, and the inner wall of the limiting shaft is provided with a groove that matches the teeth.

[0013] As a further improvement of this utility model: the outer wall of the retaining ring is integrally formed with a toothed rack, and one end of the sliding frame is welded with a limiting toothed plate that engages with the toothed rack.

[0014] Compared with the prior art, the present invention provides an angle grinder with the following advantages:

[0015] This application utilizes a quick-release design, allowing the protective cover to be quickly installed onto the mounting ring. By using a knob to drive the threaded column to move laterally, the insert plate is inserted into the slot, achieving mechanical locking. After the sliding frame is in contact with the outer wall of the retaining ring, pressure is applied, and the limiting toothed plate and the rack engage, forming a double lock. This effectively prevents the protective cover from loosening or shifting during high-speed operation, significantly improving safety.

[0016] The handle achieves its folding function through the rotational connection between the limiting shaft and the U-shaped frame. Combined with the engagement of the toothed ring driven by the spring and the toothed groove of the limiting shaft, it can provide rigid fixation when unfolded, preventing shaking during operation. When folded, the handle fits tightly against the body of the angle grinder, reducing the storage volume and making it easy to carry and store.

[0017] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the side structure of this utility model.

[0020] Figure 3 This is a schematic diagram of the installation structure of the protective component of this utility model.

[0021] Figure 4 This is a schematic diagram of the installation structure of the grinding component of this utility model.

[0022] Figure 5 This is a schematic diagram of the explosion structure of the protective component of this utility model.

[0023] Figure 6 This is a schematic diagram of the main structure of the protective component of this utility model.

[0024] Figure 7 This is a schematic diagram of the gripping component structure of this utility model.

[0025] In the diagram: 1. Angle grinder body; 2. Handle; 3. Protective cover; 4. Rack; 5. Bracket; 6. Knob; 7. Mounting ring; 8. Grinding wheel; 9. Slot; 10. Locking nut; 11. Stud; 12. Support plate; 13. Snap ring; 14. Receiving ring; 15. Insert plate; 16. Connecting plate; 17. Threaded post; 18. Limiting frame; 19. Sliding frame; 20. Limiting toothed plate; 21. Spring; 22. L-shaped plate; 23. Limiting shaft; 25. U-shaped frame; 26. Toothed ring; 27. T-shaped rod. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Example 1

[0027] An angle grinder, such as Figures 1 to 7As shown, the device includes an angle grinder body 1, with a grinding assembly mounted on the bottom of the body 1. A mounting ring 7 is fixed to the bottom of the body 1 by screws, and a protective assembly is mounted on the mounting ring 7 via a quick-release mechanism. The protective assembly includes a protective cover 3, a retaining ring 13, and a receiving ring 14. The retaining ring 13 is rotatably connected to the inner circumference of the receiving ring 14, and the protective cover 3 is fixed to the bottom of the retaining ring 13 by screws. The quick-release mechanism includes a bracket 5, a limiting frame 18, and a sliding frame 19. The bracket 5 is welded to the receiving ring 14. The top outer wall is fitted with a limiting frame 18 welded to the inner wall of one side of the bracket 5. The sliding frame 19 and the limiting frame 18 are slidably connected. A connecting plate 16 is welded to the top outer wall of the sliding frame 19. An insert plate 15 is welded to the outer wall of one side of the connecting plate 16. A slot 9 that matches the outer diameter of the insert plate 15 is opened on the outer circumference of the mounting ring 7. A threaded post 17 is threaded to one end of the bracket 5. One end of the threaded post 17 is rotatably connected to the inner wall of one side of the sliding frame 19. A knob 6 is welded to one end of the threaded post 17.

[0028] In this example, an electric motor is installed at the end of the angle grinder body 1. The electric motor can drive the grinding components to rotate for grinding operations. The specific structure of the angle grinder body 1 includes a gearbox, switch, speed control mechanism and power supply, etc. Its structural settings and usage process are existing technologies and will not be elaborated on here.

[0029] To improve the safety of angle grinder use, a protective component can be used to cover the grinding components during use, preventing injury to the user due to accidental splashing or breakage of the grinding components. When installing the protective component and the mounting ring 7, first, the inner circumference of the retaining ring 13 is fitted onto the outer circumference of the mounting ring 7, ensuring that the insert plate 15 and the slot 9 are aligned. Then, according to the protective position of the protective cover 3, the protective cover 3 and the retaining ring 13 are rotated along the receiving ring 14. When the protective cover 3 is rotated to the protective position... The screw thread 17 is driven to rotate by the knob 6. During the rotation of the screw thread 17, the sliding frame 19 moves under the guidance of the limiting frame 18. During the movement of the sliding frame 19, the insert plate 15 is inserted into the inner wall of the slot 9, limiting the position between the retaining ring 13 and the mounting ring 7, thus fixing the protective component and the mounting ring 7. At the same time, when the sliding frame 19 moves to fit against the outer circumference of the retaining ring 13, the pressure of the sliding frame 19 on the retaining ring 13 limits the position of the protective cover 3, ensuring the stability of the protective cover 3 during the use of the angle grinder.

[0030] The grinding assembly includes a stud 11 and a support plate 12. The support plate 12 is connected to the output end of the motor installed inside the angle grinder body 1 via a coupling. The stud 11 is fixed to the bottom of the support plate 12. A grinding wheel 8 is sleeved on the outer wall of the stud 11, and a locking nut 10 is threaded on the outer circumference of the stud 11.

[0031] When installing the grinding wheel 8, it is placed on the outer circumference of the stud 11, and the locking nut 10 is tightened with a special wrench to fix the grinding wheel 8 between the support plate 12 and the locking nut 10.

[0032] The angle grinder body 1 is equipped with a grip assembly on its side wall. The grip assembly includes a limiting shaft 23, a rotating block 24, and a U-shaped frame 25. The U-shaped frame 25 is fixed to the side wall of the angle grinder body 1 by screws. The limiting shaft 23 is rotatably connected between the top and bottom of the U-shaped frame 25. The rotating block 24 is fixed to the outer circumference of the limiting shaft 23. A handle 2 is welded to one side of the outer wall of the rotating block 24. A limiting assembly for limiting the limiting shaft 23 is installed on the top outer wall of the U-shaped frame 25. The limiting assembly includes a spring 21, an L-shaped plate 22, and a T-shaped rod 27. The L-shaped plate 22 is welded to the top outer wall of the U-shaped frame 25. The T-shaped rod 27 is slidably connected to the inner wall of the through hole on the surface of the L-shaped plate 22. The two ends of the spring 21 are fixed to the top inner wall of the T-shaped rod 27 and the top outer wall of the L-shaped plate 22, respectively. A toothed ring 26 that cooperates with the limiting shaft 23 is welded to the bottom of the T-shaped rod 27.

[0033] To further improve the stability of the angle grinder during use, the user holds the main body 1 and the handle 2 with both hands during grinding. During use, the handle 2 uses the elasticity of the spring 21 to engage the toothed ring 26 with the top of the limiting shaft 23, ensuring the stability of the handle 2. When the handle 2 needs to be folded to reduce storage space after use, the T-shaped rod 27 is lifted along the L-shaped plate 22, disengaging the toothed ring 26 and the top of the limiting shaft 23. The limiting shaft 23 is then rotated along the U-shaped frame 25 to gradually fold the handle 2. After the handle 2 is folded, the T-shaped rod 27 is released, allowing the toothed ring 26 to re-engage with the inner wall of the limiting shaft 23 under the rebound force of the spring 21. The outer circumference of the toothed ring 26 is provided with teeth, which engage with the grooves on the top of the limiting shaft 23 to prevent the limiting shaft 23 from rotating relative to the toothed ring 26.

[0034] Working principle: When the angle grinder is powered on and the switch on the main body 1 is pressed, the motor installed inside the main body 1 starts working. Power is transmitted to the coupling via a gearbox and other transmission mechanisms, driving the support plate 12 to rotate. As the support plate 12 rotates, the grinding wheel 8 also rotates, allowing for grinding of the workpiece surface. The locking nut 10 ensures the grinding wheel 8 is securely mounted on the stud 11, preventing it from falling off during rotation. The protective assembly can be easily installed on the mounting ring 7 via quick-release parts. During installation, first, the retaining ring 13 is fitted onto the mounting ring 7, and the insert plate 15 is aligned with the slot 9. The protective cover 3 and retaining ring 13 are rotated to the desired position. The screw thread 17 is then rotated via the knob 6, causing the sliding frame 19 to move under the guidance of the limit frame 18 until the insert plate 15 is inserted. The protective components are fixed in the slot 9, while the sliding frame 19 applies pressure to the retaining ring 13 to ensure the stability of the protective cover 3 during use. The handle 2 is connected to the U-shaped frame 25 through the limiting shaft 23, which can realize two states: folding and fixing. During use, the elasticity of the spring 21 makes the toothed ring 26 engage with the top of the limiting shaft 23 to ensure the stability of the handle 2. When it is necessary to fold the handle 2 to reduce storage space, lift the T-shaped rod 27, and the toothed ring 26 disengages from the limiting shaft 23. Rotate the limiting shaft 23 to gradually fold the handle 2. After folding, release the T-shaped rod 27, and the toothed ring 26 re-engages with the top of the limiting shaft 23 under the action of the spring 21 to achieve fixation. The teeth on the toothed ring 26 are matched with the toothed grooves on the top of the limiting shaft 23 to prevent the limiting shaft 23 from rotating relative to the toothed ring 26. Example 2

[0035] An angle grinder, in order to further improve the stability of the protective cover 3 during use, such as Figures 1 to 7 As shown, this embodiment makes the following additions based on embodiment 1: the outer circumference of the retaining ring 13 is integrally formed with a toothed rack 4, and one end of the sliding frame 19 is welded with a limiting toothed plate 20 that cooperates with the toothed rack 4.

[0036] When the protective cover 3 is adjusted to the protective position, the sliding frame 19 drives the limiting tooth plate 20 and the rack 4 to engage during the movement, further improving the stability of the protective cover 3.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An angle grinder comprising an angle grinder body (1), characterized in that, The bottom of the angle grinder body (1) is fixed with a mounting ring (7), the mounting ring (7) is provided with a protection assembly through a quick release part, the protection assembly comprises a protective cover (3), a clamping ring (13) and a containing ring (14), the quick release part comprises a support (5), a limiting frame (18) and a sliding frame (19), the support (5) is welded to the top outer wall of the containing ring (14), the limiting frame (18) is welded to the inner wall of one side of the support (5), the sliding frame (19) is movably connected with the limiting frame (18), the top of the sliding frame (19) is welded with a connecting plate (16), one side of the connecting plate (16) is welded with a plug plate (15), the circumferential outer wall of the mounting ring (7) is provided with a plug groove (9) matched with the plug plate (15), one end of the support (5) is threadedly connected with a threaded column (17), one end of the threaded column (17) is movably connected with the sliding frame (19), and the other end is welded with a knob (6).

2. An angle grinder according to claim 1, characterized in that The clamping ring (13) is movably connected to the circumferential inner wall of the containing ring (14), and the protective cover (3) is fixed to the bottom of the clamping ring (13).

3. An angle grinder according to claim 2, characterized in that The bottom of the angle grinder body (1) is provided with a polishing assembly, the polishing assembly comprises a threaded column (11) and a supporting disc (12), the supporting disc (12) is connected to the output end of the motor installed in the angle grinder body (1) through a shaft coupling, the threaded column (11) is fixed to the bottom of the supporting disc (12), the outer wall of the threaded column (11) is sleeved with a polishing wheel (8), and the circumferential outer wall of the threaded column (11) is threadedly connected with a locking nut (10).

4. An angle grinder according to claim 3, characterized in that A holding assembly is mounted on the side wall of the angle grinder body (1), the holding assembly comprises a limiting shaft (23), a rotating block (24) and a U-shaped frame (25), the U-shaped frame (25) is fixed to the side wall of the angle grinder body (1), the limiting shaft (23) is movably connected between the top and the bottom of the U-shaped frame (25), the rotating block (24) is fixed to the circumferential outer wall of the limiting shaft (23), and one side of the rotating block (24) is welded with a handle (2).

5. An angle grinder according to claim 4, characterized in that A limiting assembly is mounted on the top of the U-shaped frame (25), the limiting assembly comprises a spring (21), an L-shaped plate (22) and a T-shaped rod (27), the L-shaped plate (22) is welded to the top of the U-shaped frame (25), the T-shaped rod (27) is movably connected in the through hole of the L-shaped plate (22), the spring (21) is fixed to the top of the T-shaped rod (27) and the top of the L-shaped plate (22) respectively, and the bottom of the T-shaped rod (27) is welded with a toothed ring (26) matched with the limiting shaft (23).

6. An angle grinder according to claim 5, characterized in that The circumferential outer wall of the toothed ring (26) is provided with teeth, and the inner wall of the limiting shaft (23) is provided with a tooth groove matched with the teeth.

7. An angle grinder according to claim 6, characterized in that The circumferential outer wall of the clamping ring (13) is integrally formed with a gear rack (4), and one end of the sliding frame (19) is welded with a limiting tooth plate (20) matched with the gear rack (4).

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