Angle grinder with blade convenient to disassemble

Abstract

The angle grinder is characterized in that the angle grinder comprises an angle grinder body, the blade, a protective shell, a base, a supporting frame, a limiting block, an adjusting screw rod, a reset assembly and a buffering assembly, the protective shell and the blade are installed on the angle grinder body, the blade is half wrapped by the protective shell, the base is connected to the protective shell, the supporting frame is connected to the base, and the limiting block is arranged on the supporting frame. A limiting block is slidably connected into the supporting frame, the bottom of the limiting block is in extrusion fit with the blade, the adjusting screw is rotationally connected with the top of the supporting frame and is in threaded fit with the limiting block, a reset assembly used for rapidly resetting the adjusting screw is arranged on the supporting frame, and a buffering assembly used for protecting the limiting block is arranged at the bottom of the limiting block. The tool has the advantages that the locking force of the blade is controllable through the threaded fit of the limiting block and the adjusting screw rod, and the blade is flexibly clamped during disassembly through the friction pad and the buffer assembly, so that non-contact locking is realized, the hand is thoroughly prevented from approaching a rotating part, and the operation safety is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and in particular to an angle grinder with easy blade removal. Background Technology

[0002] An angle grinder is a power tool widely used in metal processing, construction and decoration, and other fields. It achieves grinding, cutting, and polishing functions through a high-speed rotating grinding wheel or cutting disc. A typical angle grinder usually consists of a drive motor, output spindle, protective cover, and blade clamping mechanism. The blade is fixed to the spindle by a locking nut and relies on the motor to achieve high-speed rotation at thousands of revolutions per minute. Due to the intense friction and impact during operation, the blade wears at a high rate and therefore needs to be replaced frequently to ensure processing efficiency and safety.

[0003] In existing technologies, changing angle grinder blades typically requires a specialized mechanical locking mechanism. Specifically, most angle grinders have a locking button or locking hole at the end of the spindle. Users must press the button or insert a special wrench to lock the spindle before rotating the locking nut to remove the blade. However, this process requires the user to hold the blade or locking device in place with one hand while simultaneously tightening the nut with the other, making the operation cumbersome and prone to failure due to uneven force. Furthermore, some models even require additional tools for disassembly and assembly, further increasing the complexity.

[0004] Current blade disassembly methods present multiple safety hazards and efficiency bottlenecks. First, when manually securing the blade or locking mechanism, the user's fingers are easily close to the edges of high-speed rotating parts, potentially leading to cuts or injuries. Second, multi-tool operation not only reduces work efficiency but is also inconvenient in confined spaces or high-altitude work scenarios, and tool slippage can cause secondary injuries. Utility Model Content

[0005] The technical problem this invention aims to solve is that the operation is cumbersome and poses safety hazards. It provides an angle grinder with easily detachable blades to address these issues.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an angle grinder with easy-to-disassemble blade, including an angle grinder, blade, protective shell, base, support frame, limiting block, adjusting screw, reset component and buffer component. The angle grinder is equipped with a protective shell and blade. The protective shell partially encloses the blade. The base is connected to the protective shell. The support frame is connected to the base. The limiting block is slidably connected inside the support frame. The bottom of the limiting block is pressed against the blade. The adjusting screw is rotatably connected to the top of the support frame. The adjusting screw is threadedly engaged with the limiting block. The support frame is provided with a reset component for quickly resetting the adjusting screw. The bottom of the limiting block is provided with a buffer component for protecting it.

[0007] A further preferred embodiment of this utility model is as follows: the reset assembly includes a fixed plate, a spring, an operating plate, and a bolt. The fixed plate is connected to the support frame. The adjusting screw is rotatably connected to the fixed plate. The outer ring of the fixed plate has several limiting holes. The spring is installed inside the fixed plate. The inner end of the spring is fixedly connected to the adjusting screw, and the outer end is fixedly connected to the fixed plate. The part of the adjusting screw that passes through the fixed plate is connected to the operating plate. The operating plate has a through hole with the same center as the limiting holes. The bolt is slidably connected to the operating plate. The bolt passes through the operating plate and is interference-fitted with the limiting holes.

[0008] A further preferred embodiment of this utility model is: the buffer assembly includes a compression frame and a return spring, the compression frame is slidably connected to the bottom of the limiting block, the return spring is sleeved on the compression frame, one end of the return spring is connected to the limiting block, and the other end is connected to the compression frame.

[0009] A further preferred embodiment of this utility model is: it also includes a friction pad, and the bottom of the extrusion frame is connected to the friction pad, which is in contact with the blade.

[0010] A further preferred embodiment of this utility model is: it also includes an anti-slip pad, and the top of the adjusting screw is connected to the anti-slip pad.

[0011] A further preferred embodiment of this utility model is: it also includes a guide ring, a guide ring is provided in the limiting hole, the top of the guide ring is provided with a chamfer, and the bolt is slidably connected to the guide ring.

[0012] A further preferred embodiment of this utility model is: it also includes a pull rope, one end of which is connected to the bolt rod, and the other end is connected to the operating panel.

[0013] A further preferred embodiment of this utility model is: it also includes identification cards, and two identification cards are provided on the top surface of the fixed plate. The identification cards are used to indicate the correspondence between the rotation direction of the adjusting screw and the movement direction of the limit block.

[0014] Compared with the prior art, the advantages of this utility model are: the locking force of the blade is controllable through the threaded engagement of the limiting block and the adjusting screw, and the blade is flexibly clamped during disassembly through the friction pad and buffer assembly, achieving non-contact locking and completely avoiding hand contact with rotating parts, thus ensuring operational safety; through the spring, adjusting screw and limiting hole, the operator only needs to rotate the operating plate and insert or remove the bolt with one hand to complete the locking and releasing of the blade, without the need for additional tools or two-handed operation, realizing single-tool, single-handed operation, and greatly simplifying the blade replacement process. Attached Figure Description

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the specific structure of the base and support frame of this utility model;

[0018] Figure 3 This is a cross-sectional view showing the connection relationship between the limiting block and the adjusting screw of this utility model;

[0019] Figure 4 This is a cross-sectional view showing the connection relationship between the limiting hole and the bolt rod in this utility model.

[0020] Figure 5 This is a schematic diagram of the installation structure of the extrusion frame and the return spring of this utility model.

[0021] In the diagram: 1. Angle grinder, 2. Blade, 3. Protective housing, 4. Base, 5. Support frame, 6. Limiting block, 7. Adjusting screw, 8. Fixed plate, 9. Spring, 10. Limiting hole, 101. Control panel, 11. Bolt, 12. Extrusion frame, 13. Return spring, 14. Friction pad, 15. Anti-slip pad, 16. Guide ring, 17. Pull rope, 18. Identification card. Detailed Implementation

[0022] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0023] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0024] This embodiment mainly describes the structure of the angle grinder, as follows:

[0025] An angle grinder with easily removable blades, such as Figures 1-5As shown, the device includes an angle grinder 1, a blade 2, a protective housing 3, a base 4, a support frame 5, a limiting block 6, an adjusting screw 7, a reset assembly, and a buffer assembly. The handheld angle grinder 1 is equipped with a protective housing 3 and a blade 2. The blade 2 is a grinding wheel or cutting disc. The protective housing 3 partially encloses the blade 2. The base 4 is connected to the protective housing 3, and a through hole is opened at the connection between the protective housing 3 and the base 4. The support frame 5 is connected to the base 4, and a through hole is opened at the connection between the base 4 and the support frame 5. The limiting block 6 is slidably connected inside the support frame 5. The limiting block 6 passes through the through hole between the protective housing 3 and the base 4. The adjusting screw 7 is rotatably connected to the top of the support frame 5. The top of the adjusting screw 7 is equipped with a hand-tightening square plate and a hexagonal head for easy wrench turning. The adjusting screw 7 is threadedly engaged with the limiting block 6. The support frame 5 is equipped with a reset assembly for quickly resetting the adjusting screw 7. The bottom of the limiting block 6 is equipped with a buffer assembly for its protection.

[0026] like Figure 4 As shown, the reset assembly includes a fixed plate 8, a spring 9, an operating plate 101, and a bolt 11. The fixed plate 8 is welded onto the support frame 5. The top of the adjusting screw 7 is rotatably connected to the fixed plate 8. Several limiting holes 10 are opened on the outer ring of the fixed plate 8. The spring 9 is installed inside the fixed plate 8. The inner end of the spring 9 is fixedly connected to the adjusting screw 7, and the outer end of the spring 9 is fixedly connected to the fixed plate 8. The portion of the adjusting screw 7 that passes through the fixed plate 8 is connected to the operating plate 101. The operating plate 101 has a through hole concentric with the limiting holes 10. The bolt 11 is slidably connected to the operating plate 101, and the bolt 11 passes through the operating plate 101 and is interference-fitted with the limiting holes 10. The operator pinches the adjusting screw 7 and pulls the bolt 11 outward to disengage it from the limiting holes 10. At this time, the spring 9 is in a free state, and the operating plate 101 can rotate freely. Rotating the operating plate 101 drives the adjusting screw 7 to rotate synchronously. Because the adjusting screw 7 is threadedly engaged with the limiting block 6, the limiting block 6 moves vertically downward along the inner wall of the support frame 5 during rotation, while the mainspring 9 is gradually wound up and stores energy due to the rotation of the screw. When the bottom of the limiting block 6 contacts the surface of the blade 2, continue rotating the operating plate 101 until the resistance increases significantly and then stop. Align the bolt 11 with the nearest limiting hole 10 and insert it. The bolt 11 and the limiting hole 10 are interference-fitted to lock the position of the adjusting screw 7. At this time, the energy storage state of the mainspring 9 is maintained, and the limiting block 6 maintains continuous pressure on the blade 2.

[0027] like Figure 5As shown, the buffer assembly includes a compression frame 12 and a return spring 13. The compression frame 12 is slidably connected to the bottom of the limiting block 6, and the return spring 13 is sleeved on the compression frame 12. One end of the return spring 13 is connected to the limiting block 6, and the other end is connected to the compression frame 12. When the limiting block 6 moves downward, the compression frame 12 flexibly contacts the surface of the blade 2 under the preload of the return spring 13. When the operator further rotates the adjusting screw 7 to apply pressure, the compression frame 12 retracts upward under the reaction force of the blade 2, and the return spring 13 is compressed and stores elastic potential energy. After disassembly, the return spring 13 releases the stored elastic potential energy, pushing the compression frame 12 back to its initial position.

[0028] like Figure 5 As shown, it also includes a friction pad 14. The bottom of the extrusion frame 12 is connected to the friction pad 14. The friction pad 14 contacts the blade 2 and prevents the blade 2 from rotating. The friction pad 14 avoids hard collisions through flexible contact. The friction pad 14 adapts to blades 2 of different thicknesses to ensure stable clamping.

[0029] like Figure 4 As shown, it also includes an anti-slip pad 15. The top of the adjusting screw 7 is connected to the anti-slip pad 15. When the operator pinches the anti-slip pad 15 and rotates the operating plate 101, the surface texture increases the friction of the hand, prevents slipping, and ensures accurate force application.

[0030] like Figure 4 As shown, it also includes a guide ring 16. The guide ring 16 is provided in the limiting hole 10. The top of the guide ring 16 is provided with a chamfer. The bolt 11 is slidably connected to the guide ring 16. When the operator inserts the bolt 11, the guide ring 16 guides the bolt 11 to be accurately aligned, so that it can slide smoothly into the limiting hole 10 and avoid jamming or misalignment.

[0031] like Figure 4 As shown, it also includes a pull rope 17, one end of which is connected to the bolt 11 and the other end is connected to the operating plate 101. When the bolt 11 is pulled out, the pull rope 17 prevents it from falling and being lost. After the bolt 11 is released, the pull rope 17 allows it to hang down naturally, making it easy to insert quickly next time.

[0032] like Figure 2 As shown, it also includes identification cards 18. Two identification cards 18 are provided on the top surface of the fixed plate 8. The identification cards 18 are used to indicate the correspondence between the rotation direction of the adjusting screw 7 and the movement direction of the limit block 6. The operator rotates the operating plate 101 according to the indication to ensure that the limit block 6 moves correctly.

[0033] When disassembling blade 2, the operator holds the anti-slip pad 15 at the top of the adjusting screw 7 with one hand and pulls the bolt 11 outward to disengage it from the limiting hole 10. Following the directional indication on the marking card 18 on the surface of the fixed plate 8, the operator rotates the operating plate 101 clockwise, causing the adjusting screw 7 to rotate synchronously. At this time, the spring 9 gradually winds up and stores energy as the screw rotates, and the limiting block 6 moves vertically downward along the inner wall of the support frame 5 under the drive of the thread. Its bottom compression frame 12 contacts the surface of blade 2 through the friction pad 14. When the frictional resistance increases significantly, rotation is stopped and the bolt 11 is inserted into the nearest limiting hole 10 to lock the position of the adjusting screw 7. At this time, the return spring 13 is compressed, and the friction pad 14 forms a flexible clamp with the blade 2, effectively limiting the rotation of blade 2.

[0034] Remove the original locking nut of the angle grinder and pull out the bolt 11 again. The spring 9 quickly releases its stored energy, driving the adjusting screw 7 to rotate in the opposite direction. The limit block 6 then moves upward and resets, and the pressing frame 12 disengages from the surface of the blade 2 under the push of the return spring 13. The pull rope 17 keeps the bolt 11 connected to the operating plate 101 to prevent parts from being lost. When the limit block 6 is fully reset to its initial position, the bolt 11 automatically engages with the limit hole 10 under gravity, the system returns to standby mode, and the blade 2 can be safely removed. The entire process does not require manual fixing of the blade 2; single-tool operation is achieved through mechanical linkage, significantly reducing operational risks and improving efficiency.

[0035] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] The above provides a detailed description of an angle grinder with easily detachable blades provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. An angle grinder with easily detachable blades, characterized in that: The device includes an angle grinder (1), a blade (2), a protective shell (3), a base (4), a support frame (5), a limiting block (6), an adjusting screw (7), a reset component, and a buffer component. The angle grinder (1) is equipped with a protective shell (3) and a blade (2). The protective shell (3) partially encloses the blade (2). The protective shell (3) is connected to the base (4). The base (4) is connected to the support frame (5). The limiting block (6) is slidably connected inside the support frame (5). The bottom of the limiting block (6) is pressed against the blade (2). The adjusting screw (7) is rotatably connected to the top of the support frame (5). The adjusting screw (7) is threadedly engaged with the limiting block (6). The support frame (5) is equipped with a reset component for quickly resetting the adjusting screw (7). The bottom of the limiting block (6) is equipped with a buffer component for protecting it.

2. The angle grinder with easily detachable blades according to claim 1, characterized in that: The reset assembly includes a fixed plate (8), a spring (9), an operating plate (101), and a bolt (11). The fixed plate (8) is connected to the support frame (5). The adjusting screw (7) is rotatably connected to the fixed plate (8). The outer ring of the fixed plate (8) has several limiting holes (10). The spring (9) is installed inside the fixed plate (8). The inner end of the spring (9) is fixedly connected to the adjusting screw (7), and the outer end is fixedly connected to the fixed plate (8). The adjusting screw (7) passes through the fixed plate (8) and is connected to the operating plate (101). The operating plate (101) has a through hole with the same center as the limiting hole (10). The bolt (11) is slidably connected to the operating plate (101). The bolt (11) passes through the operating plate (101) and is interference-fitted with the limiting hole (10).

3. An angle grinder with easily detachable blades according to claim 2, characterized in that: The buffer assembly includes a compression frame (12) and a return spring (13). The compression frame (12) is slidably connected to the bottom of the limiting block (6). The return spring (13) is sleeved on the compression frame (12). One end of the return spring (13) is connected to the limiting block (6), and the other end is connected to the compression frame (12).

4. An angle grinder with easily detachable blades according to claim 3, characterized in that: It also includes a friction pad (14), which is connected to the bottom of the extrusion frame (12) and is in contact with the blade (2).

5. An angle grinder with easily detachable blades according to claim 4, characterized in that: It also includes an anti-slip pad (15), and the top of the adjusting screw (7) is connected to the anti-slip pad (15).

6. An angle grinder with easily detachable blades according to claim 5, characterized in that: It also includes a guide ring (16), a guide ring (16) is provided in the limiting hole (10), the top of the guide ring (16) is provided with a chamfer, and the bolt (11) is slidably connected to the guide ring (16).

7. An angle grinder with easily detachable blades according to claim 6, characterized in that: It also includes a pull rope (17), one end of which is connected to the bolt (11), and the other end is connected to the operating panel (101).

8. An angle grinder with easily detachable blades according to claim 7, characterized in that: It also includes identification cards (18). Two identification cards (18) are provided on the top surface of the fixed plate (8). The identification cards (18) are used to indicate the correspondence between the rotation direction of the adjusting screw (7) and the movement direction of the limit block (6).

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