A self-locking lithium battery direct drive angle grinder

Abstract

The present invention discloses a self-locking lithium battery direct drive angle grinder, belonging to the technical field of angle grinders, which includes a body. A cutting head is connected to the front side of the body, and a cutting tool is connected to the bottom of the cutting head. A shielding mechanism for shielding angle grinding dust is fixedly installed at the bottom of the cutting head. A limiting component is arranged at the top of the cutting head, and the limiting component can be nested with the cutting head rotor shaft to assist in disassembling the cutting tool. In the present invention, the first spring can drive the first telescopic rod to shorten by using its own pulling force. The shortening of the first telescopic rod can drive the switch body to slide downward, so that the switch body slides into the power supply slot, avoiding accidental touch of the switch body during the process of replacing the battery holder, realizing the hiding of the switch body after the battery holder is separated from the body, reducing the accidental touch phenomenon during battery replacement, and avoiding mutual interference between the operation of the rotor shaft and the limiting component after the battery holder is connected and the switch body is turned on and energized, improving the use safety.

Description

Technical Field

[0001] The present invention belongs to the technical field of angle grinders, and particularly relates to a self-locking lithium battery direct drive angle grinder. Background Art

[0002] An angle grinder, also known as a grinding machine or disc grinder, is a grinding tool used for cutting and grinding fiberglass. An angle grinder is a portable electric tool that uses fiberglass for cutting and grinding, mainly used for cutting, grinding, and brushing metals and stones, etc. Traditional angle grinders mostly perform cutting operations through external cables, with low portability.

[0003] Chinese Patent CN114406863A discloses a lithium battery direct drive angle grinder with a self-locking structure, including a handle. One end of the handle is connected to a head shell, and the other end is provided with a lithium battery pack; a brushless stator is fixedly installed inside the head shell, and a rotor shaft is rotatably arranged. A brushless rotor is fixedly installed on the rotor shaft. One end of the rotor shaft extends out of the head shell and is fixedly provided with a cutting tool or a grinding tool; the self-locking structure includes a self-locking pin, a self-locking cap connected to one end of the self-locking pin, a self-locking spring sleeved on the self-locking pin, and a self-locking pressing plate fixedly sleeved on the rotor shaft. A cap groove is provided on the surface of the head shell, and a through hole is provided on the bottom surface of the cap groove. One end of the self-locking spring abuts against the bottom surface of the cap groove, and the other end abuts against the self-locking cap; at least one self-locking hole is circumferentially provided on the self-locking pressing plate, and one end of the self-locking pin extending into the cavity can extend into any one of the self-locking holes. The above solution improves the disassembly of the cutting tool through the lithium battery direct drive angle grinder with a self-locking structure. However, when the rotor shaft is limited by the self-locking mechanism, it is still in a state of being connected to the switch. This leads to the rotation of the rotor shaft and the cutting part easily caused by accidental contact of the switch during battery disassembly and installation, and also causes the torque of the brushless motor to increase due to the locking of the rotor shaft by the self-locking mechanism, affecting the service life of the brushless motor. Summary of the Invention

[0004] The purpose of the present invention is to provide a self-locking lithium battery direct drive angle grinder to solve the problem that the torque of the brushless motor increases due to the locking of the rotor shaft by the self-locking mechanism, affecting the durability and service life.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A self-locking lithium battery direct drive angle grinder includes a body. A cutting head is connected to the front side of the body, and a cutting tool is connected to the bottom of the cutting head. A shielding mechanism for shielding angle grinding dust is fixedly installed at the bottom of the cutting head. A limiting component is arranged at the top of the cutting head. The limiting component can be nested with the rotor shaft of the cutting head to assist in disassembling the cutting tool. A switch safety mechanism is fixedly installed on the top of the body. The switch safety mechanism extends to the rear side of the body. The rear end of the body is detachably connected to a battery seat through a buckle. The battery seat cooperates with the switch safety mechanism to cut off the switch after the battery seat is loosened. A ventilation ring is fixedly connected to the outer side wall of the body.

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

[0008] The switch fuse mechanism includes a switch body which is slidably connected in a power supply slot opened at the top of the fuselage. A fixed seat is fixedly connected to the inner cavity of the power supply slot. Both sides of the top of the fixed seat are fixedly connected with a first telescopic rod. The top of the first telescopic rod is connected to the bottom of the switch body. A triangular plate is fixedly connected to one side of the switch body. A fixed block is fixedly connected to the bottom of the ventilation ring. A sliding hole is opened on one side of the fixed block. A sliding rod is slidably connected in the sliding hole. One end of the sliding rod is in contact with one side of the inclined surface of the triangular plate, and the other end of the sliding rod extends to the rear end of the fuselage and is in contact with one side of the battery holder.

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

[0010] A first spring is sleeved on the outer side wall of the first telescopic rod. One end of the first spring is fixedly connected to the bottom of the switch body, and the other end of the first spring is fixedly connected to the top of the fixed seat.

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

[0012] A second spring is sleeved on the outer side wall of the sliding rod. One end of the second spring is connected to one side of the fixed block, and the other end of the second spring is connected to one end of the outer side wall of the sliding rod.

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

[0014] The shielding mechanism includes a shielding cover. A clamping hoop is fixedly connected to the inner cavity of the shielding cover. The clamping hoop is detachably connected to the outer side of the bottom of the cutting head. An adsorption net is connected to the inner cavity of the shielding cover.

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

[0016] A cavity is opened in the shielding cover, and a through groove is opened at the end of the cavity of the shielding cover. The adsorption net is slidably connected in the cavity of the shielding cover. A pulling block is fixedly connected to one side of the adsorption net close to the through groove. The pulling block is located in the through groove, and a handle is arranged at the bottom of the pulling block.

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

[0018] A plurality of ventilation holes for smoke and dust to enter are opened in the inner frame of the shielding cover, and the adsorption net is an asbestos net.

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

[0020] The limiting component includes a ferrule. A limiting groove for limiting the rotor shaft of the angle grinder is formed on the bottom side of the ferrule. A connecting plate is fixedly connected to the top of the ferrule. One side of the bottom of the connecting plate is fixedly connected to a second telescopic rod, and the second telescopic rod is connected to the top of the cutting head.

[0021] As a further description of the above technical solution:

[0022] Clamping parts are fixedly connected to both sides of the cutting head, and a holding rod is clamped on one side of the clamping part.

[0023] To sum up, due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0024] 1. In the present invention, when the battery holder is separated from the fuselage, the sliding rod is no longer limited. At this time, the second spring can drive the sliding rod to slide in the fixed block by its own elastic force. The sliding of the sliding rod in the sliding hole on one side of the fixed block is more stable, and it can avoid shaking and offset during the movement. When the sliding rod moves and separates from the triangular plate on one side, after the triangular plate is no longer limited, the first spring can drive the first telescopic rod to shorten by its own pulling force. The shortening of the first telescopic rod can drive the switch body to slide downward, so that the switch body slides into the power supply slot, avoiding accidental touch of the switch body during the process of replacing the battery holder, realizing the hiding of the switch body after the battery holder is separated from the fuselage, reducing the accidental touch phenomenon during battery replacement, and avoiding the mutual interference between the working of the rotor shaft and the limiting component after the battery holder is connected and the rotor shaft works when the switch body is turned on and powered on after being opened, improving the use safety.

[0025] 2. In the present invention, through the designed shielding mechanism, when the shielding cover is clamped outside the nose of the fuselage by the clamp, during angle grinding and cutting, the frictional sparks generated by the angle grinder can be blocked by the shielding cover on one side, and when the cutting sparks and dust can pass through the ventilation holes inside the shielding cover and be blocked by the adsorption net. After single-angle grinding treatment, by pulling the pulling block, the adsorption net is driven to rotate in the shielding cover. The rotation of the adsorption net can remove the adhered soot and waste chips through the friction with the inner cavity of the shielding cover, realizing the self-cleaning of the absorbed dust, and improving the cutting neatness and stability.

[0026] 3. In the present invention, through the designed limiting component, by pressing the connecting plate, the bottom ferrule can be driven to be embedded in the bottom cutting head. The ferrule can limit the rotor shaft through the bottom limiting groove, limiting the relative position of the rotor shaft during the replacement of the cutting tool, avoiding the shaking of the rotor shaft from affecting the cutting effect. At the same time, through the clamped second telescopic rod, the movement of the connecting plate through the second telescopic rod is more stable, and the shaking and offset of the connecting plate can be avoided, improving the stability of the movement of the connecting plate and the ferrule. Description of the Drawings

[0027] Figure 1Schematic diagram of the overall structure of a self-locking lithium battery direct drive angle grinder proposed by the present invention;

[0028] Figure 2 Proposed by the present invention Figure 1 Schematic diagram of the enlarged structure of part A in

[0029] Figure 3 Top view structure diagram of a self-locking lithium battery direct drive angle grinder proposed by the present invention;

[0030] Figure 4 Horizontal structure diagram of a self-locking lithium battery direct drive angle grinder proposed by the present invention;

[0031] Figure 5 Proposed by the present invention Figure 4 Schematic diagram of the enlarged structure of part B in

[0032] Figure 6 Exploded split structure diagram of a self-locking lithium battery direct drive angle grinder proposed by the present invention;

[0033] Figure 7 Front view structure diagram of a self-locking lithium battery direct drive angle grinder proposed by the present invention;

[0034] Figure 8 Partial structure diagram of the switch safety mechanism of a self-locking lithium battery direct drive angle grinder proposed by the present invention.

[0035] Legend:

[0036] 1. Body; 2. Battery holder; 3. Buckle; 4. Cutting head; 5. Clamping part; 6. Ventilation ring; 7. Shielding mechanism; 701. Shielding cover; 702. Adsorption net; 703. Ventilation hole; 704. Through groove; 705. Pulling block; 8. Switch safety mechanism; 801. Switch body; 802. Fixed seat; 803. First telescopic rod; 804. First spring; 805. Triangular plate; 806. Slide bar; 807. Second spring; 808. Fixed block; 9. Limit component; 901. Connecting plate; 902. Second telescopic rod; 903. Casing; 10. Cutting tool; 11. Holding rod. Specific implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0038] Please refer to Figure 1-8, the present invention provides a technical solution: a self-locking lithium battery direct drive angle grinder, which includes a body 1. A cutting head 4 is connected to the front side of the body 1, and a cutting tool 10 is connected to the bottom of the cutting head 4. A shielding mechanism 7 for shielding the angle grinding dust is fixedly installed at the bottom of the cutting head 4. A limiting component 9 is arranged at the top of the cutting head 4. The limiting component 9 can be nested with the rotor shaft of the cutting head 4 to assist in disassembling the cutting tool 10. A switch safety mechanism 8 is fixedly installed at the top of the body 1. The switch safety mechanism 8 extends to the rear side of the body 1. The rear end of the body 1 is detachably connected to a battery holder 2 through a buckle 3. The battery holder 2 cooperates with the switch safety mechanism 8 to cut off the switch after the battery holder 2 becomes loose. A ventilation ring 6 is fixedly connected to the outer side wall of the body 1. By designing the ventilation ring 6, the switch safety mechanism 8 includes a switch body 801. The switch body 801 is slidably connected in a power supply slot opened at the top of the body 1, and a fixed seat 802 is fixedly connected to the inner cavity of the power supply slot. Both sides of the top of the fixed seat 802 are fixedly connected with a first telescopic rod 803. The top of the first telescopic rod 803 is connected to the bottom of the switch body 801. A triangular plate 805 is fixedly connected to one side of the switch body 801. By designing the triangular plate 805, the abutting and supporting effect can be ensured through the inclined surface of the triangular plate 805. A fixed block 808 is fixedly connected to the bottom of the ventilation ring 6. A sliding hole is opened on one side of the fixed block 808. A sliding rod 806 is slidably connected in the sliding hole. One end of the sliding rod 806 is attached to the inclined surface side of the triangular plate 805. The other end of the sliding rod 806 extends to the rear end of the body 1 and is attached to one side of the battery holder 2. A first spring 804 is sleeved on the outer side wall of the first telescopic rod 803. One end of the first spring 804 is fixedly connected to the bottom of the switch body 801, and the other end of the first spring 804 is fixedly connected to the top of the fixed seat 802. A second spring 807 is sleeved on the outer side wall of the sliding rod 806. One end of the second spring 807 is connected to one side of the fixed block 808, and the other end of the second spring 807 is connected to one end of the outer side wall of the sliding rod 806.

[0039] The implementation method is specifically as follows: When performing angle grinder processing, the battery holder 2 set wirelessly can achieve passive cutting, and the brushless motor set inside the fuselage 1 can ensure stable working conditions. When the battery needs to be replaced, the battery holder 2 can be separated from the fuselage 1 through the buckle 3. After the battery holder 2 is separated from the fuselage 1, the slide bar 806 is no longer limited. At this time, the second spring 807 can drive the slide bar 806 to slide in the fixed block 808 by its own elastic force. The sliding of the slide bar 806 in the slide hole on one side of the fixed block 808 is more stable, which can avoid shaking and deviation during the movement process. And when the slide bar 806 moves and separates from the triangular plate 805 on one side, after the triangular plate 805 is no longer limited, the first spring 804 can drive the first telescopic rod 803 to shorten by its own pulling force. The shortening of the first telescopic rod 803 can drive the switch body 801 to slide downward, so that the switch body 801 can slide into the power supply slot, thereby avoiding accidental touch of the switch body 801 during the process of replacing the battery holder 2, realizing the hiding of the switch body 801 after the battery holder 2 is separated from the fuselage 1, reducing the accidental touch phenomenon during battery replacement, and avoiding the mutual interference between the working of the rotor shaft and the limiting component 9 after the battery holder 2 is connected and the switch body 801 is turned on and energized, improving the use safety.

[0040] Please refer to Figure 6-7 , the shielding mechanism 7 includes a shielding cover 701. A clamp is fixedly connected to the inner cavity of the shielding cover 701. The clamp is detachably connected to the outer side of the bottom of the cutting head 4. An adsorption net 702 is connected to the inner cavity of the shielding cover 701. A cavity is formed in the shielding cover 701, and a through groove 704 is formed at the end of the cavity of the shielding cover 701. The adsorption net 702 is slidably connected to the inner cavity of the shielding cover 701, and a pulling block 705 is fixedly connected to the side of the adsorption net 702 close to the through groove 704. The pulling block 705 is located in the through groove 704, and a handle is provided at the bottom of the pulling block 705. A plurality of ventilation holes 703 for the entry of soot and dust are formed in the inner frame of the shielding cover 701, and the adsorption net 702 is an asbestos net;

[0041] The implementation method is specifically as follows: Through the designed shielding mechanism 7, when the shielding cover 701 is clamped outside the head of the fuselage 1 through the clamp, during angle grinding and cutting, the frictional sparks generated by the angle grinding can be blocked by the shielding cover 701 on one side, and the soot and dust of the cutting sparks can be blocked by the adsorption net 702 through the ventilation holes 703 inside the shielding cover 701. And after a single angle grinding process, the adsorption net 702 can be driven to rotate in the shielding cover 701 by pulling the pulling block 705. The rotation of the adsorption net 702 can remove the adhered soot and waste chips through the friction with the inner cavity of the shielding cover 701, so as to realize the self-cleaning of the absorbed dust, improving the cutting cleanliness and stability.

[0042] Please refer to Figure 4, the limiting component 9 includes a ferrule 903. A limiting groove for limiting the rotor shaft of the angle grinder is provided at the bottom side of the ferrule 903. A connecting plate 901 is fixedly connected to the top of the ferrule 903. A second telescopic rod 902 is fixedly connected to one side of the bottom of the connecting plate 901. The second telescopic rod 902 is connected to the top of the cutting head 4. Clamping parts 5 are fixedly connected to both sides of the cutting head 4. A holding rod 11 is clamped on one side of the clamping part 5.

[0043] The specific implementation method is as follows: Through the designed limiting component 9, pressing the connecting plate 901 can drive the bottom ferrule 903 to be embedded into the bottom cutting head 4. The ferrule 903 can limit the rotor shaft through the bottom limiting groove, so that the relative position of the rotor shaft can be limited when replacing the cutting tool 10, thereby avoiding the shaking of the rotor shaft from affecting the cutting effect. At the same time, through the clamped second telescopic rod 902, the connecting plate 901 moves more stably through the movement of the second telescopic rod 902, which can avoid the shaking and deviation of the connecting plate 901 and improve the stability of the movement of the connecting plate 901 and the ferrule 903.

[0044] Working principle: During use, when performing angle grinder processing, passive cutting is achieved through the wirelessly set battery holder 2. The brushless motor provided in the fuselage 1 ensures stable working conditions. When the battery needs to be replaced, the battery holder 2 is separated from the fuselage 1 through the buckle 3. After the battery holder 2 is separated from the fuselage 1, the slide rod 806 is no longer limited. At this time, the second spring 807 drives the slide rod 806 to slide in the fixed block 808 by its own elastic force. The sliding of the slide rod 806 in the slide hole on one side of the fixed block 808 is more stable, avoiding shaking and deviation during the movement process. When the slide rod 806 moves and separates from the triangular plate 805 on one side, after the triangular plate 805 is no longer limited, the first spring 804 drives the first telescopic rod 803 to shorten by its own pulling force. The shortening of the first telescopic rod 803 drives the switch body 801 to slide downward, so that the switch body 801 slides into the power supply slot, realizing the hiding of the switch body 801 after the battery holder 2 is separated from the fuselage 1 and reducing the accidental touch phenomenon during battery replacement;

[0045] When the shielding cover 701 is clamped outside the nose of the fuselage 1 through the clamp, during angle grinding and cutting, the frictional sparks generated by angle grinding are blocked by the shielding cover 701 on one side. When the cutting spark soot passes through the ventilation holes 703 inside the shielding cover 701, it is blocked by the adsorption net 702. After a single angle grinding process, by pulling the pulling block 705, the adsorption net 702 is driven to rotate in the shielding cover 701. The rotation of the adsorption net 702 removes the adhered soot and waste chips through the friction with the inner cavity of the shielding cover 701, realizing the self-cleaning of the absorbed dust and improving the cutting cleanliness and stability;

[0046] By pressing the connecting plate 901, the bottom collet 903 is driven to be embedded into the bottom cutting head 4. The collet 903 limits the rotor shaft through the bottom limiting groove, and limits the relative position of the rotor shaft when replacing the cutting tool 10, so as to avoid the shaking of the rotor shaft from affecting the cutting effect.

[0047] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A self-locking lithium battery direct drive angle grinder, comprising a body (1), a cutting head (4) is connected to the front side of the body (1), and a cutting tool (10) is connected to the bottom of the cutting head (4), characterized in that, A shielding mechanism (7) for shielding the dust generated by angle grinding is fixedly installed at the bottom of the cutting head (4). A limiting component (9) is arranged at the top of the cutting head (4). The limiting component (9) can be nested with the rotor shaft of the cutting head (4) to assist in disassembling the cutting tool (10). A switch safety mechanism (8) is fixedly installed at the top of the fuselage (1). The switch safety mechanism (8) extends to the rear side of the fuselage (1). The rear end of the fuselage (1) is detachably connected to a battery holder (2) through a buckle (3). The battery holder (2) cooperates with the switch safety mechanism (8) to cut off the switch after the battery holder (2) becomes loose. A ventilation ring (6) is fixedly connected to the outer side wall of the fuselage (1). The switch safety mechanism (8) includes a switch body (801). The switch body (801) is slidably connected in a power supply slot opened at the top of the fuselage (1). A fixed seat (802) is fixedly connected to the inner cavity of the power supply slot. Both sides of the top of the fixed seat (802) are fixedly connected with a first telescopic rod (803). The top of the first telescopic rod (803) is connected to the bottom of the switch body (801). A triangular plate (805) is fixedly connected to one side of the switch body (801). A fixed block (808) is fixedly connected to the bottom of the ventilation ring (6). A sliding hole is opened on one side of the fixed block (808). A sliding rod (806) is slidably connected in the sliding hole. One end of the sliding rod (806) is in contact with the inclined surface of the triangular plate (805). The other end of the sliding rod (806) extends to the rear end of the fuselage (1) and is in contact with one side of the battery holder (2). A first spring (804) is sleeved on the outer side wall of the first telescopic rod (803). One end of the first spring (804) is fixedly connected to the bottom of the switch body (801). The other end of the first spring (804) is fixedly connected to the top of the fixed seat (802). A second spring (807) is sleeved on the outer side wall of the sliding rod (806). One end of the second spring (807) is connected to one side of the fixed block (808). The other end of the second spring (807) is connected to one end of the outer side wall of the sliding rod (806). When the battery holder (2) is separated from the fuselage (1), the sliding rod (806) is no longer limited. At this time, the second spring (807) can drive the sliding rod (806) to slide in the fixed block (808) by its own elastic force. The sliding of the sliding rod (806) in the sliding hole on one side of the fixed block (808) is more stable, and it can avoid shaking and deviation during the movement. And when the sliding rod (806) moves and separates from the triangular plate (805) on one side, after the triangular plate (805) is no longer limited, the first spring (804) can drive the first telescopic rod (803) to shorten by its own pulling force. The shortening of the first telescopic rod (803) can drive the switch body (801) to slide downward, so that the switch body (801) can slide into the power supply slot.

2. The self-locking lithium battery direct drive angle grinder according to claim 1, wherein The shielding mechanism (7) includes a shielding cover (701). A clamp is fixedly connected to the inner cavity of the shielding cover (701), and the clamp is detachably connected to the outer side of the bottom of the cutting head (4). An adsorption net (702) is connected to the inner cavity of the shielding cover (701).

3. The self-locking lithium battery direct drive angle grinder according to claim 2, wherein, A cavity is formed in the shielding cover (701), and a through slot (704) is formed at the end of the cavity of the shielding cover (701). The adsorption net (702) is slidably connected to the cavity of the shielding cover (701), and a holding block (705) is fixedly connected to the side of the adsorption net (702) close to the through slot (704). The holding block (705) is located in the through slot (704), and a handle is provided at the bottom of the holding block (705).

4. The self-locking lithium battery direct drive angle grinder according to claim 2, characterized in that, A plurality of ventilation holes (703) for the entry of soot and dust are formed in the inner frame of the shielding cover (701), and the adsorption net (702) is an asbestos net.

5. A self-locking lithium battery direct drive angle grinder according to claim 1, characterized in that, The limiting component (9) includes a ferrule (903). A limiting slot for limiting the rotor shaft of the angle grinder is formed at the bottom side of the ferrule (903). A connecting plate (901) is fixedly connected to the top of the ferrule (903). A second telescopic rod (902) is fixedly connected to one side of the bottom of the connecting plate (901), and the second telescopic rod (902) is connected to the top of the cutting head (4).

6. A self-locking lithium battery direct drive angle grinder according to claim 1, characterized in that, Clamping parts (5) are fixedly connected to both sides of the cutting head (4), and a holding rod (11) is clamped to one side of each clamping part (5).

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