An angle grinder

Abstract

The utility model relates to electric tool technical field discloses an angle grinder, including the head, the outer wall of head is fixedly connected with the protection shell, the inner wall sliding connection of protection shell has a plurality of baffle, the outer wall of a plurality of baffle all is fixed with the limiting block, the outer wall fixedly connected with first spring of limiting block, the inner wall sliding connection of protection shell has the drive link, the outer wall sliding connection of drive link has second spring, the rear side fixedly connected with a plurality of clamping pin of drive link, the outer wall fixedly connected with a plurality of buckles of baffle, the inner wall of baffle is set up with a plurality of clamping groove. In the utility model, baffle can manually press and hit trigger, and quickly close the abrasive disc, avoid accidental start and accident caused by dropping the hand, improve the use safety, when baffle pops out, a plurality of buckles will be clamped into a plurality of clamping grooves and locked, further enhance the protection stability, can also reduce the accidental injury of abrasive disc, prolong the service life of equipment.

Description

Technical Field

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

[0002] Angle grinders play a crucial role in material processing workflows. Through high-speed operation, they perform cutting, grinding, and deburring operations, shaping and surface finishing of metal, stone, and tile materials to facilitate subsequent assembly, structural improvement, and aesthetic enhancement. Angle grinders are widely used in construction, machinery repair, hardware processing, and home decoration.

[0003] Angle grinders are needed to perform cutting, grinding, and deburring operations at high speeds to shape and finish the surfaces of metal, stone, and ceramic materials. Existing angle grinders mostly have a fixed semi-circular guard, which is prone to accidental collisions and slippage during operation. This prevents the guard from effectively shielding the high-speed rotating parts, resulting in material damage and personnel injury. This significantly increases production costs. In addition, the poor protective performance of the guard can lead to wear and tear on internal components, reducing product quality and shortening its lifespan.

[0004] A search revealed Chinese Patent Publication No. CN219925566U, which discloses an angle grinder, comprising: an output device including an output shaft for driving a grinding wheel, the output shaft being arranged along a first axis; a transmission device including a transmission shaft; a locking mechanism mounted on the transmission shaft for locking the transmission shaft; and a movable member disposed within the locking mechanism, the movable member moving in the direction of a second axis to lock and unlock the angle grinder, the parallel line of the first axis intersecting the second axis. Preferably, the locking mechanism is mounted on the end face of the transmission shaft, and the end face of the transmission shaft is directly locked by the movable member to lock the angle grinder. Compared to the prior art which adds a locking block to lock the circular surface of the transmission shaft, this significantly reduces costs. Furthermore, the movement direction of the movable member can be set arbitrarily within a wide range, only requiring the first axis to intersect the second axis, thus ensuring operator comfort when operating the movable member. However, the above-mentioned utility model patents have obvious defects. They do not set up protective structures for high-speed rotating parts, and only focus on transmission shaft locking and operation comfort. When accidental collisions or equipment slips out of the hands during operation, there is a lack of a protective plate design that can protect the high-speed rotating parts in time, which can easily cause material damage and personal injury. At the same time, it cannot prevent internal parts from wearing out due to insufficient protection, making it difficult to solve the problems of increased production costs, reduced product quality and reduced service life. This is precisely the significant advantage of the angle grinder of this utility model, which has a protective plate design that can be quickly triggered and stably locked. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an angle grinder, which aims to solve the problem that the protective plate in the prior art is not completely safe and is prone to accidents.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an angle grinder includes a rotating head, a protective shell fixedly connected to the outer wall of the rotating head, a plurality of protective plates slidably connected to the inner wall of the protective shell, a limit block fixedly fixed to the outer wall of each of the multiple protective plates, a first spring fixedly connected to the outer wall of the limit block, a drive rod slidably connected to the inner wall of the protective shell, a second spring slidably connected to the outer wall of the drive rod, a plurality of locking pins fixedly connected to the rear side of the drive rod, a plurality of buckles fixedly connected to the outer wall of the protective plates, a plurality of slots formed on the inner wall of the protective plates, and a tensioning mechanism threadedly connected to the outer wall of the rotating head, the tensioning mechanism automatically clamping the grinding disc with a linked gripper to prevent it from falling off at high speed.

[0007] As a further description of the above technical solution:

[0008] The tensioning mechanism includes a mounting head, the inner wall of which is threadedly connected to the outer wall of a rotating head. Multiple rotating shafts are rotatably connected to the outer wall of the mounting head. First connecting rods are rotatably connected to the outer walls of each of the multiple rotating shafts. Compression blocks are fixedly connected between adjacent first connecting rods. A crank rod is rotatably connected to the outer wall of each first connecting rod. Second connecting rods are rotatably connected to the outer wall of each crank rod. Bushings are slidably connected to the outer walls of the multiple second connecting rods. Third springs are fixedly connected to the bottom of the multiple second connecting rods.

[0009] As a further description of the above technical solution:

[0010] The outer wall of the rotating head is fixedly connected to a housing, and the outer wall of the rotating head is fixedly connected to a blade.

[0011] As a further description of the above technical solution:

[0012] A button is slidably connected to the outer wall of the housing, and a first grip is fixedly connected to the outer wall of the housing.

[0013] As a further description of the above technical solution:

[0014] A fixing post is fixedly connected to the rear side of the outer shell, and a second grip is fixedly connected to the outer wall of the fixing post.

[0015] As a further description of the above technical solution:

[0016] An anti-slip pad is fixedly connected to the outer wall of the first grip, and multiple heat dissipation holes are provided on the inner wall of the first grip.

[0017] As a further description of the above technical solution:

[0018] A mounting base is fixedly connected to the right side of the first grip, and the inner wall of the mounting base is provided with a mounting groove.

[0019] As a further description of the above technical solution:

[0020] The inner wall of the mounting groove is fitted with a mounting buckle, and a power supply is fixedly connected to the right side of the mounting buckle.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the guard plate can be manually pressed and triggered by impact to quickly shut off the grinding disc, avoiding accidents caused by accidental start-up and slippage, thus improving safety. The limiting block on the outer wall of the guard plate fixes the first spring, providing instantaneous ejection power for rapid protection. When the guard plate is retracted, it is pushed into the protective shell, and the guard plate positioning groove will engage with multiple locking pins behind the drive rod to complete the locking. When triggered, pressing the drive rod disengages the locking pins, and the guard plate pops out. At the same time, the second spring assists the drive rod to reset, facilitating the next cycle of use. When the guard plate pops out, multiple buckles will engage with multiple slots to assist in positioning and locking, further enhancing the stability of protection, reducing accidental damage to the grinding disc, and extending the equipment's lifespan.

[0023] 2. In this utility model, the tensioning mechanism is used to prevent the blade from detaching during high-speed operation and avoid personnel injury. First, the mounting head is screwed onto the rotating head and initially fixed by the thread. During operation, the centrifugal force generated by the rotating head drives the outer wall shaft and the first connecting rod to rotate, so that the extrusion block is pressed tightly against the blade. The faster the rotation speed, the more firmly it is clamped. At the same time, the first connecting rod drives the crank rod, pulls the second connecting rod to slide in the bushing and compress the third spring. After the machine stops, the spring rebounds and pushes the component to reset, causing the extrusion block to loosen. This mechanism automatically clamps the extrusion block, strengthens protection, greatly reduces the probability of personnel injury, reduces blade wear, and improves operational stability. Attached Figure Description

[0024] Figure 1 This is a front perspective view of an angle grinder proposed in this utility model;

[0025] Figure 2 for Figure 1 Enlarged view of point A in the image;

[0026] Figure 3 This is a top view of an angle grinder proposed in this utility model;

[0027] Figure 4 This is a partial structural diagram of an angle grinder proposed in this utility model;

[0028] Figure 5 for Figure 4 Enlarged view of point B in the image.

[0029] Legend:

[0030] 1. Rotating head; 2. Tensioning mechanism; 201. Mounting head; 202. Rotating shaft; 203. First connecting rod; 204. Extrusion block; 205. Crank rod; 206. Second connecting rod; 207. Bushing; 208. Third spring; 3. Protective shell; 4. Guard plate; 5. Limiting block; 6. First spring; 7. Drive rod; 8. Second spring; 9. Locking pin; 10. Snap fastener; 11. Snap slot; 12. Outer shell; 13. Blade; 14. Button; 15. First grip; 16. Fixing post; 17. Second grip; 18. Anti-slip pad; 19. Heat dissipation hole; 20. Mounting base; 21. Mounting slot; 22. Mounting buckle; 23. Power supply. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see the appendix Figure 3 Appendix Figure 4 and attached Figure 5 An embodiment of this utility model provides an angle grinder, including a rotating head 1. A protective shell 3 is fixedly connected to the outer wall of the rotating head 1. Multiple protective plates 4 are slidably connected to the inner wall of the protective shell 3. Limiting blocks 5 are fixed to the outer walls of the multiple protective plates 4. A first spring 6 is fixedly connected to the outer wall of the limiting blocks 5. A driving rod 7 is slidably connected to the inner wall of the protective shell 3. A second spring 8 is slidably connected to the outer wall of the driving rod 7. Multiple locking pins 9 are fixedly connected to the rear side of the driving rod 7. Multiple buckles 10 are fixedly connected to the outer wall of the protective plates 4. Multiple slots 11 are opened on the inner wall of the protective plates 4. A tensioning mechanism 2 is threadedly connected to the outer wall of the rotating head 1. The tensioning mechanism 2 causes the linked grippers to automatically clamp the grinding disc to prevent it from falling off at high speed.

[0033] Specifically, multiple protective plates 4 slidably connected to the inner wall of the protective shell 3 can be manually or by impact to close the grinding disc, preventing accidental activation and slippage. The limiting block 5 fixed to the outer wall of the protective plate 4 secures the first spring 6, providing instantaneous power for the ejection of the protective plate 4 to ensure rapid protection. When the protective plate 4 is retracted, it is pushed back into the protective shell 3, and the positioning groove of the protective plate 4 engages with multiple locking pins 9 on the rear side of the drive rod 7 to lock the protective plate 4. When triggered, pressing the drive rod 7 causes the locking pins 9 to disengage from the protective plate 4, completing the triggering. The second spring 8 provides a restoring force to the drive rod 7. At the same time, multiple buckles 10 on the inner wall of the protective plate 4 can engage with multiple slots 11 during ejection to complete auxiliary positioning and locking, further enhancing the safety of the protective structure. The rotating head 1 can drive the grinding disc to rotate at high speed. In conjunction with the tensioning mechanism 2 connected by threads on the outer wall, the grinding disc can be automatically clamped by the linkage jaws to prevent the grinding disc from falling off during high-speed operation and ensure stable cutting operations.

[0034] Please see the appendix Figure 1 and attached Figure 2 The tensioning mechanism 2 includes a mounting head 201, the inner wall of which is threadedly connected to the outer wall of the rotating head 1. Multiple rotating shafts 202 are rotatably connected to the outer wall of the mounting head 201. First connecting rods 203 are rotatably connected to the outer walls of the multiple rotating shafts 202. Compression blocks 204 are fixedly connected between adjacent first connecting rods 203. A crank rod 205 is rotatably connected to the outer wall of the first connecting rod 203. A second connecting rod 206 is rotatably connected to the outer wall of the crank rod 205. A bushing 207 is slidably connected to the outer wall of the multiple second connecting rods 206. A third spring 208 is fixedly connected to the bottom of the multiple second connecting rods 206.

[0035] Specifically, the tensioning mechanism 2 can be used to prevent the blade 13 from falling off during high-speed operation. The inner wall of the mounting head 201 and the outer wall of the rotating head 1 are threaded together to complete the initial installation. When working, the rotating head 1 generates centrifugal force at high speed, which causes the rotating shaft 202 on its outer wall to rotate and drive the first connecting rod 203 to rotate. The pressing block 204 is used to adhere to the grinding disc to achieve the clamping of the blade 13 during high-speed operation. The faster the rotation speed, the tighter the clamping. At the same time, the movement of the first connecting rod 203 drives the crank 205, and the crank 205 then pulls the second connecting rod 206 to slide up and down in the bushing 207, compressing the third spring 208 at the bottom. When stopping, the third spring 208 rebounds and pushes the first connecting rod 203 in the opposite direction through the second connecting rod 206 and the crank 205, causing the pressing block 204 to release the grinding disc and achieve automatic tensioning.

[0036] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 3The outer wall of the rotating head 1 is fixedly connected to the outer shell 12, the outer wall of the rotating head 1 is fixedly connected to the blade 13, the rear side of the outer shell 12 is fixedly connected to the fixing post 16, the outer wall of the fixing post 16 is fixedly connected to the second handle 17, the outer wall of the outer shell 12 is slidably connected to the button 14, and the outer wall of the outer shell 12 is fixedly connected to the first handle 15.

[0037] Specifically, the outer shell 12 fixed to the outer wall of the rotating head 1 is used to protect the internal components and provide a base for installation. The first grip 15 on the left side of the outer shell 12 and the second grip 17 on the rear fixed post 16 are convenient for two-hand gripping operation. The button 14 on the outer wall of the outer shell 12 can control the machine to start and stop.

[0038] Please see the appendix Figure 1 and attached Figure 3 An anti-slip pad 18 is fixedly connected to the outer wall of the first grip 15. Multiple heat dissipation holes 19 are opened on the inner wall of the first grip 15. An installation buckle 22 is snapped into the inner wall of the mounting groove 21. A power supply 23 is fixedly connected to the right side of the installation buckle 22. An installation base 20 is fixedly connected to the right side of the first grip 15. An installation groove 21 is opened on the inner wall of the installation base 20.

[0039] Specifically, the anti-slip pad 18 on the outer wall of the first grip 15 increases the friction between the hand and the grip, making it more stable to hold and preventing slippage that could affect operation. The multiple heat dissipation holes 19 on its inner wall can dissipate heat near the grip in time, preventing the grip from overheating after prolonged use. The mounting base 20 on the right side of the first grip 15 has a mounting groove 21 on its inner wall for engaging the mounting buckle 22. The power supply 23 fixed to the right side of the mounting buckle 22 can be quickly fixed to the mounting base 20 through the engaging method, making it easy to install and replace the power supply 23 to power the equipment.

[0040] Working principle: The guard plate 4 can be closed by manual pressing and impact to prevent accidental start-up and slippage. The limiting block 5 on the outer wall of the guard plate 4 fixes the first spring 6, providing instantaneous power for the guard plate 4 to pop out, achieving rapid protection. When the guard plate 4 is retracted, it is pushed into the protective shell 3. The positioning groove of the guard plate 4 will lock the multiple locking pins 9 behind the drive rod 7, thus locking the guard plate 4. When triggered, the drive rod 7 is pressed, and the second spring 8 provides the restoring force for the drive rod 7 to complete the cycle of the next operation. The locking pins 9 disengage from the guard plate 4, causing it to pop out. When it pops out, it is locked by multiple locking buckles 10, which assist in positioning and locking, making it safer.

[0041] The tensioning mechanism 2 prevents the blade 13 from detaching during high-speed rotation, thus avoiding injury. First, the mounting head 201 is screwed onto the rotating head 1 and tightened by the thread to complete the initial fixation. During operation, the centrifugal force generated by the rotating head 1 causes the rotating shaft 202 on the outer wall to rotate, which in turn rotates the first connecting rod 203, causing the pressing block 204 fixed on the outer wall to press against the blade 13. The faster it rotates, the tighter it is pressed, and the more firmly the blade 13 is clamped. At the same time, when the first connecting rod 203 moves, it will drive the crank 205. The crank 205 then pulls the second connecting rod 206 up and down in the bushing 207, pressing down the third spring 208 at the bottom. After the machine stops, the spring rebounds, pushing the second connecting rod 206 and the crank 205 in turn to push the first connecting rod 203. The pressing block 204 loosens the grinding disc, and the pressing block 204 automatically clamps the grinding disc through the linkage, strengthening protection and reducing the probability of injury or death.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An angle grinder, comprising a rotating head (1), characterized in that: The outer wall of the rotating head (1) is fixedly connected to a protective shell (3). The inner wall of the protective shell (3) is slidably connected to multiple guard plates (4). The outer walls of the multiple guard plates (4) are fixed with limit blocks (5). The outer walls of the limit blocks (5) are fixedly connected to a first spring (6). The inner wall of the protective shell (3) is slidably connected to a drive rod (7). The outer wall of the drive rod (7) is slidably connected to a second spring (8). The rear side of the drive rod (7) is fixedly connected to multiple locking pins (9). The outer wall of the guard plate (4) is fixedly connected to multiple buckles (10). The inner wall of the guard plate (4) is provided with multiple slots (11). The outer wall of the rotating head (1) is threadedly connected to a tensioning mechanism (2). The tensioning mechanism (2) automatically clamps the grinding disc with the linked gripper to prevent it from falling off at high speed.

2. The angle grinder according to claim 1, characterized in that: The tensioning mechanism (2) includes a mounting head (201), the inner wall of which is threadedly connected to the outer wall of the rotating head (1). The outer wall of the mounting head (201) is rotatably connected to a plurality of rotating shafts (202). The outer walls of the plurality of rotating shafts (202) are rotatably connected to a first connecting rod (203). The adjacent first connecting rods (203) are fixedly connected to a pressing block (204). The outer wall of the first connecting rod (203) is rotatably connected to a crank rod (205). The outer wall of the crank rod (205) is rotatably connected to a second connecting rod (206). The outer walls of the plurality of second connecting rods (206) are slidably connected to a bushing (207). The bottom of the plurality of second connecting rods (206) is fixedly connected to a third spring (208).

3. An angle grinder according to claim 1, characterized in that: The outer wall of the rotating head (1) is fixedly connected to the outer shell (12), and the outer wall of the rotating head (1) is fixedly connected to the blade (13).

4. An angle grinder according to claim 3, characterized in that: A button (14) is slidably connected to the outer wall of the housing (12), and a first grip (15) is fixedly connected to the outer wall of the housing (12).

5. An angle grinder according to claim 3, characterized in that: A fixing post (16) is fixedly connected to the rear side of the outer shell (12), and a second handle (17) is fixedly connected to the outer wall of the fixing post (16).

6. An angle grinder according to claim 4, characterized in that: The outer wall of the first grip (15) is fixedly connected with an anti-slip pad (18), and the inner wall of the first grip (15) is provided with multiple heat dissipation holes (19).

7. An angle grinder according to claim 4, characterized in that: A mounting base (20) is fixedly connected to the right side of the first grip (15), and the inner wall of the mounting base (20) is provided with a mounting groove (21).

8. An angle grinder according to claim 7, characterized in that: The inner wall of the mounting groove (21) is fitted with a mounting buckle (22), and a power supply (23) is fixedly connected to the right side of the mounting buckle (22).

Images