Novel angle grinder with quick accessory replacement function

Abstract

The invention discloses a novel angle grinder with a quick accessory replacement function, and relates to the technical field of angle grinders. A novel angle grinder with a quick accessory replacement function comprises a body, the body comprises a motor bin, an accessory mechanism is installed on the motor bin, and a main shaft mechanism is arranged between the accessory mechanism and the body; the accessory mechanism comprises an accessory, a connecting ring assembly is embedded in a center hole of the accessory, the connecting ring assembly comprises a connecting ring, an inserting block is fixedly connected into the connecting ring, and inclined grooves are formed in the two sides of the inserting block. The main shaft mechanism comprises a main shaft; the main shaft mechanism is provided with a shaft ring mechanism matched with the connecting ring assembly in a matched mode, the shaft ring mechanism comprises a shaft ring fixedly connected with the main shaft in a sleeving mode, protruding blocks matched with the inserting blocks in an embedded mode are evenly and fixedly connected to the outer side of the shaft ring at equal intervals, and the two sides of each protruding block are each provided with a communicated side groove. During compression assembly, the assembly efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of angle grinder technology, specifically to a novel angle grinder with a quick attachment change function. Background Technology

[0002] An angle grinder, also known as a grinding machine or disc grinder, is an abrasive tool used for cutting and polishing fiberglass. It is a handheld power tool primarily used for cutting, grinding, and brushing metals and stone.

[0003] Angle grinders, widely used handheld power tools in metal processing, construction and decoration, and machinery repair, primarily perform grinding, cutting, and polishing operations through high-speed rotating grinding wheels, cutting discs, polishing wheels, and other attachments. With increasing industrial production efficiency and stricter operational safety requirements, the inefficiencies, cumbersome operation, and insufficient safety of traditional angle grinders in attachment changing have become increasingly prominent, representing key bottlenecks hindering further optimization.

[0004] Currently, most mainstream angle grinders on the market use a traditional structure for accessory assembly, where accessories, such as cutting discs, are threaded into the spindle and then secured with a wrench. Disassembly requires the reverse process. This method leads to inefficient replacement and disrupts continuous operation. Furthermore, over time, the threads can loosen due to vibration, which is difficult for users to detect in real time, creating a hidden risk.

[0005] Patent CN114683142A discloses an angle grinder with an easy-to-change grinding wheel. The angle grinder includes a body, a base at the lower left side of the body, a fixing tooth 1 fixedly connected to the lower surface of the base, a connecting shaft fixedly connected to the middle of the lower surface of the fixing tooth, a limiting hole penetrating the rear surface of the connecting shaft at the lower end of the front surface, a grinding wheel at the lower left side of the body, located at the lower end of the base, a fixing tooth 2 disposed in the middle of the surface of the grinding wheel, a fixing seat at the lower left side of the body, located at the lower end of the grinding wheel, a fixing tooth 3 fixedly connected to the upper surface of the fixing seat, and both the fixing tooth 3 and the fixing tooth 2 being movably embedded within the fixing tooth 1. The upper surface of the fixed tooth three contacts the lower surface of the fixed tooth two. A through hole is opened in the middle of the lower surface of the fixed seat, penetrating the middle of the upper surface of the fixed tooth three. The lower end of the connecting shaft passes through the through hole and is flush with the lower surface of the fixed seat. An outer groove is opened at the front end of the lower surface of the fixed seat. An inner groove is opened inside the outer groove. The rear end of the inner groove communicates with the front end of the inner wall of the through hole. A limit rod is movably embedded inside the inner groove. A corresponding slot is opened on the rear side of the inner wall of the through hole. A spring is fixedly connected to the front end of the inner groove. The rear end of the spring is fixedly connected to the front end of the limit rod. A pull block is provided inside the outer groove. The surface of the pull block is flush with the lower surface of the fixed seat. The upper end of the pull block passes through the inner groove and is fixedly connected to the limit rod. By sliding the pull block forward, the limiting rod moves towards the front end of the inner groove. The spring will compress and contract, and the rear end of the limiting rod will move out of the slot and disengage from the limiting hole. Next, by moving the fixing seat downwards, the fixing tooth three on the fixing seat will disengage from the fixing tooth one, and the connecting shaft will move out of the upper end of the fixing tooth three. Releasing the pull block will cause the spring to push the limiting rod back to its initial position, after which the fixing seat can be removed. Then, by grasping the grinding wheel and pulling it downwards, the fixing tooth two on the grinding wheel will disengage from the fixing tooth one on the base. The grinding wheel can then be removed and a new grinding wheel installed. When installing a new grinding wheel, first move it to the position corresponding to the base, then push the grinding wheel upwards and allow the fixing... The second fixed tooth is inserted into the first fixed tooth, at which point the upper surface of the grinding wheel contacts the lower surface of the base. Then, the fixed seat is moved upward, allowing the connecting shaft to pass through the third fixed tooth. Next, the pull block is pulled back towards the front of the fixed seat, causing it to move the limiting rod towards the front of the inner groove. When the rear end of the limiting rod disengages from the slot and the limiting hole, the fixed seat is pushed upward. At this point, the lower end of the connecting shaft moves to be flush with the lower surface of the fixed seat. Then, the pull block can be released, allowing the spring to push the limiting rod through the limiting hole and into the slot. This completes the replacement and installation of the grinding wheel. It is not only easy to operate, but also effectively solves the problem of difficulty in replacement due to stripped threads, saving replacement time and having high practicality.

[0006] In the above technical solution, there is a significant gap between the first fixed tooth and the second fixed tooth. Therefore, after the grinding wheel is fitted into the connecting shaft, the operator still needs to manually stabilize the grinding wheel. The manual stabilization of the grinding wheel can only be released after the fixed seat is installed in place. This increases the difficulty of installation and makes it inconvenient for the operator to operate. Therefore, there is an urgent need for a new type of angle grinder with a quick accessory change function to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a novel angle grinder with a quick attachment change function to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a novel angle grinder with quick attachment change function, comprising a body, the body including a motor compartment, a main handle fixedly connected to one side of the motor compartment, a wiring connection fixedly connected to the tail end of the main handle, an attachment mechanism installed on the motor compartment, and a spindle mechanism provided between the attachment mechanism and the body;

[0009] The accessory mechanism includes an accessory, and a connecting ring assembly is embedded in the central hole of the accessory. The connecting ring assembly includes a connecting ring that is fixedly inserted into the central hole of the accessory. Insert blocks are fixedly connected at equal intervals inside the ring of the connecting ring, and each insert block has oblique grooves on both sides.

[0010] The main shaft mechanism includes a main shaft with a fixed connection to the output end of the motor compartment;

[0011] The main spindle mechanism is provided with a collar mechanism that is compatible with the connecting ring assembly. The collar mechanism includes a collar that is fixedly sleeved on the main spindle. Protrusions that are compatible with the fitting blocks are fixedly connected at equal intervals on the outside of the collar. Each protrusion has a communicating side groove on both sides. Each side groove has a locking block for abutting the insertion block.

[0012] The collar mechanism is equipped with a head sleeve mechanism, which includes a top cover adapted to connect to the main shaft. The lower end face of the top cover is fixedly connected with filling rollers adapted to insert through slots at equal and even intervals. The filling rollers and the locking blocks abut against each other. The lower end face of the top cover is fixedly connected with a bottom cover adapted to snap-fit ​​ring assembly.

[0013] As a preferred embodiment of the present invention, an auxiliary handle perpendicular to the main handle is fixedly connected to the other side of the motor compartment.

[0014] The motor compartment is fixedly connected with a protective shell for protecting the accessories.

[0015] As a preferred embodiment of the present invention, a plug groove is radially provided at the front end of the main shaft, and a docking groove extending radially through the main shaft is provided on the outer side of the bottom of the plug groove, and a sensor corresponding to the docking groove is fixedly embedded on the inner side of the bottom of the plug groove.

[0016] The upper inner wall of the insertion slot is provided with a wedge-shaped horizontal groove, and the outer inner wall of the insertion slot is provided with a vertical longitudinal groove.

[0017] An assembly block is slidably disposed inside the insertion slot. A second elastic element is fixedly connected between the inner end of the assembly block and the insertion slot. A first slider of the sliding insertion transverse groove is fixedly connected to the upper surface of the assembly block.

[0018] The insertion slot is provided with a fastener, the fastener and the assembly block are inclined to each other, the lower end of the fastener has rounded corners on both sides, and the second slider of the sliding insertion groove is fixedly connected to the middle of the outer end face of the fastener.

[0019] As a preferred embodiment of the present invention, each of the card blocks has a card slot with a matching fitting oblique groove in the middle of its outer end, and both sides of the outer end of the card block are chamfered.

[0020] A first elastic element located in the side groove is fixedly connected between the two locking blocks that share the common insertion protrusion. There are two first elastic elements, which respectively fit the inner walls of the two arc surfaces of the side groove.

[0021] Each of the protrusions has a vertical through-slot in the middle, and the through-slot is directly between the two first elastic elements;

[0022] The filling roller and the first elastic element abut against each other.

[0023] As a preferred embodiment of the present invention, a handle groove is provided on the outer side of the top cover, and a plate groove communicating with the handle groove is provided on the lower end face of the top cover, wherein the plate groove and the mating groove correspond to each other.

[0024] A pull handle is embedded in the handle groove. The outer surface of the pull handle is rough. A pull plate that matches the insertion plate groove is fixedly connected to the inner surface of the pull handle. The pull plate passes through the insertion groove and is inserted into the bottom of the insertion groove.

[0025] The upper surface of the pull plate is provided with a buckle groove that fits the lower end of the buckle seat. The two sides of the buckle groove are rounded. The lower end face of the assembly block is attached to the pull plate.

[0026] The end of the pull plate away from the handle has an identification slot adapted to fit the sensor.

[0027] As a preferred embodiment of the present invention, the bottom cover has flanges of mating blocks that are evenly and uniformly fixedly connected within the ring, and each flange has a side groove on both sides for fitting the locking block.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] (1) A new type of angle grinder with quick accessory change function. The outer end of the clamping block is chamfered on both sides and squeezed into the side groove. When the connecting ring assembly contacts the clamping block, the clamping block is pushed into the protrusion by the chamfer. This reduces the dependence on the operator's operation accuracy. The clamping groove and the insert of the connecting ring assembly are precisely engaged by the chamfer, forming an axial limit that clamps the two sides of the insert. Initial fixation can be completed without the need for supporting accessories, which reduces assembly time and improves assembly efficiency.

[0030] (2) A new type of angle grinder with quick attachment change function. High-precision coaxial positioning can reduce uneven wear of spindle and attachments, such as cutting discs and grinding discs, extend service life, and avoid workpiece processing errors caused by vibration, thereby improving processing accuracy.

[0031] (3) The new type of angle grinder with quick attachment change function will not cause the attachment to move or fall off due to slight collision when the angle grinder is moved and flipped, which solves the safety hazard of attachments easily slipping off during the pre-installation stage and improves the connection stability of attachments during the pre-installation stage.

[0032] (4) A new type of angle grinder with quick attachment change function. In the pre-installation stage, if the attachment is not completely centered, the locking block will not be fully returned to its original position. The insertion block of the connecting ring assembly cannot be fully engaged with the slot, which will produce obvious jamming and misalignment gap. This can intuitively prompt the assembler to readjust, avoid the danger of attachment falling off during operation due to false installation, and improve the fault tolerance of assembly.

[0033] (5) A new type of angle grinder with quick attachment change function restricts the circumferential movement of the insert block by physical filling and rigid contact with the locking block. Combined with the snapping pressure of the head cover mechanism, the displacement of the locking block can be controlled within the error range, avoiding the problem of reduced connection force due to fatigue of the first elastic element due to long-term use. It completely eliminates the problem of the locking block loosening due to vibration when the attachment rotates at high speed, and further improves the connection stability.

[0034] (6) A new type of angle grinder with quick attachment change function, the filling roller simultaneously abuts against the first elastic element such as a spring, so that it remains in a natural state and cannot be compressed or pulled, thus avoiding the first elastic element from being damaged by vibration during the operation of the angle grinder, so that the clamping force of the locking block on the attachment insertion block remains stable for a long time and improves the service life.

[0035] (7) A new type of angle grinder with quick attachment change function. The fit between the filling roller and the through groove makes the insertion calibrated. When the attachment has a slight eccentricity, the filling roller will force the attachment to return to the correct position when it is inserted into the through groove, ensuring the final coaxiality and improving the ease of operation and positioning accuracy.

[0036] (8) A new type of angle grinder with quick attachment change function. The assembly block always maintains the pre-pressure on the buckle through the second elastic element. When the pull plate is fixed, the wedge effect of the inclined surface of the assembly block and the buckle further amplifies the radial clamping force, which further reduces the coaxiality error between the attachment and the spindle, improves the positioning accuracy, and further enhances the overall stability of the connection.

[0037] (9) A new type of angle grinder with quick attachment change function. If the pull plate is not fully inserted, the sensor and the identification slot cannot be fully engaged. The axial locking force between the head cover mechanism and the spindle is reduced, triggering the limit switch built into the angle grinder controlled by the sensor, forcibly cutting off the power supply, and thus preventing the angle grinder from starting to work. This avoids safety problems caused by poor assembly and improves safety protection performance.

[0038] (10) A new type of angle grinder with quick attachment change function converts the centrifugal force of the assembly block into the positive pressure of the buckle on the buckle groove, thereby strengthening the locking of the pull plate. The higher the working speed of the spindle of the angle grinder, the greater the centrifugal force, and therefore the stronger the locking force of the pull plate. It retains the convenience of quick attachment change and solves the problem of loosening of the traditional locking structure under high-speed rotation conditions, significantly improving the safety and economy of use. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0040] Figure 2 This is a bottom view of the main structure of the present invention;

[0041] Figure 3 This is a schematic diagram of the spindle mechanism of the present invention;

[0042] Figure 4 For the present invention Figure 3 Enlarged view of point A;

[0043] Figure 5 This is a schematic diagram of the collar mechanism of the present invention;

[0044] Figure 6 This is a schematic diagram of the appendix mechanism of the present invention;

[0045] Figure 7 This is a schematic diagram of the plug connection of the present invention;

[0046] Figure 8 This is a schematic diagram of the headgear mechanism of the present invention;

[0047] Figure 9 This is a bottom-view schematic diagram of the headgear mechanism of the present invention;

[0048] Figure 10 This is a schematic diagram of the bottom cover connection of the present invention;

[0049] Figure 11 This is a schematic diagram of the flange connection of the present invention;

[0050] Figure 12 This is a schematic diagram of the top cover of the present invention;

[0051] Figure 13 This is a schematic diagram of the pull plate of the present invention;

[0052] Figure 14 This is a schematic diagram of the pull plate connection of the present invention;

[0053] Figure 15 This is a schematic diagram of the angle grinder of the present invention.

[0054] In the diagram: 1. Main body; 101. Motor compartment; 102. Main handle; 103. Wiring; 104. Auxiliary handle; 105. Protective shell; 2. Accessory mechanism; 201. Accessory; 202. Connecting ring; 203. Insertion block; 204. Inclined groove; 3. Main spindle mechanism; 301. Main spindle; 302. Insertion groove; 303. Docking groove; 304. Sensor; 305. Horizontal groove; 306. Vertical groove; 307. Assembly block; 308. Second elastic element; 309. First slider; 3 10. Buckle; 311. Second slider; 4. Collar mechanism; 401. Collar; 402. Protrusion; 403. Side groove; 404. Locking block; 405. Locking groove; 406. First elastic element; 407. Through groove; 5. Head cover mechanism; 501. Top cover; 502. Handle groove; 503. Plate groove; 504. Pull handle; 505. Pull plate; 506. Buckle groove; 507. Identification groove; 508. Filling roller; 509. Bottom cover; 510. Flange; 511. Side groove. Detailed Implementation

[0055] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0056] Example: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 8 , Figure 9 , Figure 15A new type of angle grinder with quick attachment change function includes a body 1, the body 1 includes a motor compartment 101, a main handle 102 is fixedly connected to one side of the motor compartment 101, a wiring 103 is fixedly connected to the tail end of the main handle 102, an attachment mechanism 2 is installed on the motor compartment 101, and a spindle mechanism 3 is provided between the attachment mechanism 2 and the body 1.

[0057] The accessory mechanism 2 includes an accessory 201. A connecting ring assembly is embedded in the central hole of the accessory 201. The connecting ring assembly includes a connecting ring 202 that is fixedly inserted into the central hole of the accessory 201. Insert blocks 203 are fixedly connected evenly at equal intervals inside the ring of the connecting ring 202. Each insert block 203 has a slanted groove 204 on both sides.

[0058] The main spindle mechanism 3 includes a main spindle 301 with a fixed connection to the output end of the motor housing 101;

[0059] The spindle mechanism 3 is provided with a collar mechanism 4 that is compatible with the connecting ring assembly. The collar mechanism 4 includes a collar 401 that is fixedly sleeved on the spindle 301. The collar 401 is uniformly and evenly fixedly connected with protrusions 402 that are compatible with the fitting insert 203. Each protrusion 402 has a communicating side groove 403 on both sides. Each side groove 403 has a locking block 404 inserted into it for abutting the insert 203.

[0060] A head sleeve mechanism 5 is installed on the collar mechanism 4. The head sleeve mechanism 5 includes a top cover 501 adapted to be connected to the main shaft 301. The lower end face of the top cover 501 is fixedly connected with a filling roller 508 adapted to be connected to the insertion through groove 407 at equal intervals. The filling roller 508 and the locking block 404 abut against each other. The lower end face of the top cover 501 is fixedly connected with a bottom cover 509 adapted to be connected to the snap-fit ​​ring assembly.

[0061] See also Figure 1 An auxiliary handle 104, perpendicular to the main handle 102, is fixedly connected to the other side of the motor compartment 101;

[0062] A protective casing 105 for protecting accessory 201 is fixedly connected to the motor compartment 101.

[0063] See also Figure 4 The front end of the spindle 301 is radially provided with a insertion groove 302, and the bottom outer side of the insertion groove 302 is radially extended with a mating groove 303 that penetrates the spindle 301. The bottom inner side of the insertion groove 302 is fixedly embedded with a sensor 304 corresponding to the mating groove 303.

[0064] The upper inner wall of the insertion groove 302 is provided with a wedge-shaped transverse groove 305, and the outer inner wall of the insertion groove 302 is provided with a vertical longitudinal groove 306.

[0065] An assembly block 307 is slidably disposed inside the insertion slot 302. A second elastic element 308 is fixedly connected between the inner end of the assembly block 307 and the insertion slot 302. A first slider 309 of the sliding insertion transverse groove 305 is fixedly connected to the upper surface of the assembly block 307.

[0066] The insertion slot 302 is provided with a fastener 310 inside. The fastener 310 and the assembly block 307 are inclined to each other. Both sides of the lower end of the fastener 310 are rounded. The second slider 311 of the sliding insertion groove 306 is fixedly connected to the middle of the outer end face of the fastener 310.

[0067] See also Figure 5 , Figure 7 Each card block 404 has a card slot 405 adapted to fit the inclined groove 204 in the middle of its outer end, and both sides of the outer end of the card block 404 are chamfered.

[0068] Two locking blocks 404 that are connected to the common insertion protrusion 402 are fixedly connected to a first elastic member 406 located in the side groove 403. There are two first elastic members 406, which respectively fit the inner walls of the two arc surfaces of the side groove 403.

[0069] Each protrusion 402 has a vertical through groove 407 in the middle, and the through groove 407 is directly between the two first elastic members 406.

[0070] The filling roller 508 and the first elastic element 406 abut against each other.

[0071] See also Figure 12 , Figure 13 , Figure 14 The top cover 501 has a handle groove 502 on its outer side, and the bottom surface of the top cover 501 has a plate groove 503 that communicates with the handle groove 502. The plate groove 503 and the docking groove 303 correspond to each other.

[0072] A pull handle 504 is embedded in the handle groove 502. The outer surface of the pull handle 504 is rough. A pull plate 505 that is adapted to the insertion plate groove 503 is fixedly connected to the inner surface of the pull handle 504. The pull plate 505 passes through the insertion groove 303 and is inserted into the bottom of the insertion groove 302.

[0073] The upper surface of the pull plate 505 is provided with a buckle groove 506 that is adapted to fit the lower end of the buckle seat 310. The two sides of the buckle groove 506 are rounded, and the lower end surface of the assembly block 307 is attached to the pull plate 505.

[0074] The end of the pull plate 505 away from the pull handle 504 has an identification groove 507 adapted to fit the sensor 304.

[0075] See also Figure 10 , Figure 11The flanges 510 of the mating blocks 203 are fixedly connected evenly and at equal intervals inside the ring of the bottom cover 509. Each flange 510 has a side groove 511 on both sides to fit the fitting block 404.

[0076] The working principle of this invention is as follows:

[0077] When accessory 201 is connected via the connecting ring assembly, the inclined grooves 204 on both sides of the insert block 203 of the connecting ring assembly are positioned between the two protrusions 402 of the connecting collar mechanism 4. The chamfered edges on both sides of the outer end of the locking block 404 press it into the side groove 403. When the connecting ring assembly contacts the locking block 404, the chamfered edges push the locking block 404 into the protrusion 402, reducing the dependence on the operator's precision. This is especially suitable for scenarios where gloves are worn or visibility is obstructed, forming an automatic guide and return of accessory 201. When accessory 201 is centered, the locking block 404 automatically returns to its original position under the action of the first elastic element 406, such as a spring. The locking groove 405 and the insert block 203 of the connecting ring assembly precisely engage through the inclined grooves 204, forming an axial limit that clamps the insert block 203 on both sides. Initial fixation can be completed without supporting accessory 201, reducing assembly time and improving assembly efficiency.

[0078] The slots 405 of the locking blocks 404 on both sides of the protrusion 402 are symmetrically distributed and are fully adapted to the inclined slots 204 of the insertion block 203 of the connecting ring assembly. After the locking block 404 returns to its original position through the first elastic element 406, the slight offset of the accessory 201 can be forcibly corrected by the engagement of the slots 405 and the inclined slots 204, ensuring the coaxiality of the accessory 201 and the spindle 301, and avoiding the eccentricity caused by high-speed rotation during operation, which would result in severe vibration. High-precision coaxial positioning can reduce uneven wear of the spindle 301 and the accessory 201, such as cutting discs and grinding discs, extend their service life, and at the same time avoid workpiece processing errors caused by vibration, thereby improving processing accuracy.

[0079] The locking block 404 continuously provides radial clamping force through the first elastic element 406 and axial support force through the locking groove 405. The insertion block 203 of the connecting ring assembly is locked between the locking grooves 405 of the two locking blocks 404 to form a mechanical interlock. Even when moving and flipping the angle grinder, the accessory 201 will not move or fall off due to slight collisions, which solves the safety hazard of the accessory 201 easily slipping off during the pre-installation stage and improves the connection stability of the accessory 201 during the pre-installation stage.

[0080] During the pre-installation stage, if accessory 201 is not fully centered, the locking block 404 will not be fully returned to its original position, and the insert block 203 of the connecting ring assembly will not be able to fully engage with the slot 405, resulting in a noticeable jamming sensation and misalignment gap. This can visually prompt the assembler to readjust, avoiding the danger of accessory 201 falling off during operation due to improper installation, and improving the fault tolerance of the assembly.

[0081] The connecting ring assembly can be embedded as a standardized module into the center hole of different types of accessories 201, such as cutting discs, polishing wheels, and wire wheels. Only by standardizing the angle and size of the inclined groove 204 of the insert block 203 of the connecting ring assembly can it be compatible with the shaft collar mechanism 4 of the same spindle 301, breaking down the specification barriers of different accessories 201. The protrusion 402 and the locking block 404 of the shaft collar mechanism 4 adopt a plug-in design, and the first elastic element 406 with different elastic forces, such as high-strength springs and memory alloy spring sheets, can be replaced according to the weight and speed requirements of the accessory 201. There is no need to reconstruct the connection structure of the spindle 301, reducing iteration costs. The modular structure of the shaft collar mechanism 4 enhances the compatibility and scalability of use.

[0082] The locking block 404 connected by the first elastic element 406 solves the initial positioning and anti-movement problem of the accessory 201. After the filling roller 508 fills the through groove 407, it limits the circumferential movement of the insertion block 203 through physical filling and rigid contact with the locking block 404. With the fastening pressure of the head cover mechanism 5, the displacement of the locking block 404 can be controlled within the error range, avoiding the problem of the first elastic element 406 fatigued due to long-term use and the resulting decrease in connection force. It completely eliminates the problem of the locking block 404 loosening due to vibration when the accessory 201 rotates at high speed, and further improves the connection stability.

[0083] The filling roller 508 simultaneously abuts against the first elastic element 406, such as a spring, keeping it in its natural state and preventing it from being compressed or pulled. This avoids the first elastic element 406 from being worn due to vibration during the operation of the angle grinder, ensuring that the clamping force of the locking block 404 on the insertion block 203 of the accessory 201 remains stable over a long period, thus improving its service life.

[0084] The headgear mechanism 5 achieves quick locking by inserting the filling roller 508 into the through groove 407. The operator can complete the continuous actions of alignment, pressing and locking with one hand. The entire process of attachment 201 from initial positioning to hard fixation can be realized without tools, saving operation time compared with traditional thread locking. The fit between the filling roller 508 and the through groove 407 makes its insertion calibrable. When attachment 201 has a slight eccentricity, the filling roller 508 will force attachment 201 back to the correct position when it is inserted into the through groove 407, ensuring the final coaxiality and improving the convenience of operation and positioning accuracy.

[0085] After the pull plate 505 is inserted into the insertion groove 302 through the insertion groove 303, a double-layer axial constraint is formed by the friction of the inner wall of the insertion groove 302 and the fitting force of the fastener 310 and the fastener groove 506. The fastener groove 506 on the pull plate 505 abuts against the bottom of the fastener 310. With the inclined fit of the fastener 310 and the assembly block 307, the axial displacement of the accessory 201 is controlled within the error range. The assembly block 307 maintains the pre-pressure on the fastener 310 through the second elastic element 308. When the pull plate 505 is fixed, the wedge effect of the inclined surfaces of the assembly block 307 and the fastener 310 further amplifies the radial clamping force, which further reduces the coaxiality error between the accessory 201 and the spindle 301, improves the positioning accuracy, and further enhances the overall stability of the connection.

[0086] An identification groove 507 is provided at the end of the pull plate 505, and a sensor 304 is installed in the insertion groove 302 of the spindle 301. If the pull plate 505 is not fully inserted, the sensor 304 and the identification groove 507 cannot be fully engaged, the axial locking force between the head sleeve mechanism 5 and the spindle 301 is reduced, triggering the limit switch built into the angle grinder controlled by the sensor 304, forcibly cutting off the power supply, and thus preventing the angle grinder from starting to work, avoiding safety problems caused by loose assembly, and improving safety protection performance.

[0087] The outer surface of the pull handle 504 is rough, and the insertion direction is perpendicular to the gripping direction of the main handle 102 when the angle grinder is working. This can prevent the pull plate 505 from coming out due to accidental hand contact during operation. In addition, with the presence of the sensor 304, if the pull plate 505 is accidentally pulled while using the corneal machine, the angle grinder will also stop working, further reducing the risk of misoperation.

[0088] Through the sliding connection of the assembly block 307 in the insertion slot 302, when the spindle 301 rotates, the assembly block 307 is subjected to centrifugal force and slides towards the buckle 310. By tilting the opposite surfaces of the assembly block 307 and the buckle 310, the centrifugal force of the assembly block 307 is converted into the positive pressure of the buckle 310 on the buckle slot 506, thereby strengthening the locking of the pull plate 505. The higher the working speed of the spindle 301 of the angle grinder, the greater the centrifugal force, and therefore the stronger the locking force of the pull plate 505. This not only retains the convenience of quick replacement of accessory 201, but also solves the problem of loosening of traditional locking structures under high-speed rotation conditions, significantly improving the safety and economy of use.

[0089] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel angle grinder with quick attachment change function, comprising a body (1), the body (1) including a motor compartment (101), a main handle (102) fixedly connected to one side of the motor compartment (101), a wiring terminal (103) fixedly connected to the tail end of the main handle (102), and an attachment mechanism (2) mounted on the motor compartment (101), characterized in that: A main shaft mechanism (3) is provided between the accessory mechanism (2) and the main body (1); The accessory mechanism (2) includes an accessory (201), and a connecting ring assembly is embedded in the central hole of the accessory (201). The connecting ring assembly includes a connecting ring (202) that is fixedly inserted into the central hole of the accessory (201). Insert blocks (203) are fixedly connected evenly at equal intervals inside the ring of the connecting ring (202). Each insert block (203) has inclined grooves (204) on both sides. The main shaft mechanism (3) includes a main shaft (301) with an output end fixedly connected to the motor housing (101); The main spindle mechanism (3) is provided with a collar mechanism (4) adapted to the connecting ring assembly. The collar mechanism (4) includes a collar (401) fixedly sleeved on the main spindle (301). The collar (401) is uniformly and equidistantly connected with protrusions (402) adapted to fit the insert (203). Each protrusion (402) has a communicating side groove (403) on both sides. Each side groove (403) has a locking block (404) inserted into it for abutting the insert (203). The collar mechanism (4) is equipped with a head sleeve mechanism (5). The head sleeve mechanism (5) includes a top cover (501) adapted to connect to the main shaft (301). The lower end face of the top cover (501) is uniformly and equidistantly connected to a filling roller (508) adapted to the insertion through groove (407). The filling roller (508) and the locking block (404) abut against each other. The lower end face of the top cover (501) is fixedly connected to a bottom cover (509) adapted to the snap-fit ​​ring assembly.

2. The novel angle grinder with quick attachment change function according to claim 1, characterized in that: An auxiliary handle (104) perpendicular to the main handle (102) is fixedly connected to the other side of the motor compartment (101); A protective shell (105) for protecting the accessory (201) is fixedly connected to the motor compartment (101).

3. The novel angle grinder with quick attachment change function according to claim 1, characterized in that: The front end of the main shaft (301) is radially provided with a plug groove (302), and the bottom outer side of the plug groove (302) is radially extended with a docking groove (303) that penetrates the main shaft (301). The bottom inner side of the plug groove (302) is fixedly embedded with a sensor (304) corresponding to the docking groove (303). The upper inner wall of the insertion groove (302) is provided with a wedge-shaped transverse groove (305), and the outer inner wall of the insertion groove (302) is provided with a vertical longitudinal groove (306).

4. The novel angle grinder with quick attachment change function according to claim 3, characterized in that: An assembly block (307) is slidably disposed inside the insertion slot (302). A second elastic element (308) is fixedly connected between the inner end of the assembly block (307) and the insertion slot (302). A first slider (309) of the sliding insertion transverse groove (305) is fixedly connected to the upper surface of the assembly block (307). The insertion slot (302) is provided with a buckle (310) inside. The buckle (310) and the assembly block (307) are inclined to each other. The lower end of the buckle (310) is rounded on both sides. The second slider (311) of the sliding insertion groove (306) is fixedly connected to the middle of the outer end face of the buckle (310).

5. The novel angle grinder with quick attachment change function according to claim 1, characterized in that: Each of the card blocks (404) has a card slot (405) adapted to fit the fitting oblique groove (204) at the middle of its outer end, and both sides of the outer end of the card block (404) are chamfered. Two locking blocks (404) that share a common insertion protrusion (402) are fixedly connected to a first elastic element (406) located in a side groove (403). There are two first elastic elements (406) and they respectively fit the inner walls of the two curved surfaces of the side groove (403). Each of the protrusions (402) has a vertical through groove (407) in the middle, and the through groove (407) is directly between the two first elastic members (406); The filling roller (508) and the first elastic element (406) abut against each other.

6. The novel angle grinder with quick attachment change function according to claim 4, characterized in that: The top cover (501) has a handle groove (502) on its outer side, and the bottom surface of the top cover (501) has a plate groove (503) that communicates with the handle groove (502). The plate groove (503) and the docking groove (303) correspond to each other. A pull handle (504) is embedded in the handle groove (502). The outer surface of the pull handle (504) is rough. A pull plate (505) that is adapted to the insertion plate groove (503) is fixedly connected to the inner surface of the pull handle (504). The pull plate (505) passes through the insertion groove (303) and is inserted into the bottom of the insertion groove (302). The upper surface of the pull plate (505) is provided with a buckle groove (506) that is adapted to fit the lower end of the buckle seat (310). The two sides of the buckle groove (506) are rounded. The lower end face of the assembly block (307) is attached to the pull plate (505). The pull plate (505) has an identification groove (507) at the end away from the pull handle (504) to accommodate the sensor (304).

7. The novel angle grinder with quick attachment change function according to claim 1, characterized in that: The bottom cover (509) has flanges (510) of mating blocks (203) fixedly connected at equal intervals inside the ring. Each flange (510) has a side groove (511) on both sides to fit the fitting block (404).

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