Anti-interference brushless lithium electric gun drill

Abstract

The utility model discloses an anti-interference brushless lithium electric gun drill which comprises a shell, a brushless motor arranged in the shell, an electric drill bit connected with an output shaft of the brushless motor and a controller, the controller drives the brushless motor through a motor driving circuit, and the anti-interference brushless lithium electric gun drill further comprises a power source for supplying power to the brushless motor. The electronic cigarette further comprises a first handle, the first handle and the shell are integrally formed, and the power source is arranged in the first handle. A first sliding way is formed in the bottom of the shell, at least part of the second handle is located in the first sliding way and can slide in the first sliding way, a plurality of clamping grooves are formed in the first sliding way at intervals, limiting parts matched with the clamping grooves are arranged at the top of the second handle, and at least one clamping groove is an inclined groove. And the gradients of the plurality of clamping grooves are different. The brushless motor protection circuit is simple in structure and strong in anti-interference capability, is equipped with the existing protection circuit and charging circuit, and can better provide guarantee for stable work of the brushless motor.

Description

Technical Field

[0001] This utility model belongs to the field of power tool technology, specifically relating to an anti-interference brushless lithium battery gun drill. Background Technology

[0002] With the rapid development of the power tool industry, the market demand for high-performance power tools is increasing. Especially in areas such as home renovation and maintenance, users have higher requirements for the portability, battery life, and operational efficiency of tools. Brushless lithium-ion battery drills, as a new type of power tool, are gradually becoming a market favorite due to their lightweight, high efficiency, and environmental friendliness. However, for example, Chinese utility model patent CN 204761236 U, which provides "An Anti-interference Servo Motor," still has shortcomings in anti-interference performance. Furthermore, due to the weight of lithium-ion battery drills, one-handed operation is relatively strenuous, and their use scenarios are varied. These issues limit the application potential of brushless lithium-ion battery drills in a wider range of scenarios. Therefore, it is crucial to obtain an anti-interference brushless lithium-ion battery drill that overcomes these shortcomings. Utility Model Content

[0003] To solve at least one of the above-mentioned technical problems, this utility model provides an anti-interference brushless lithium battery drill, including a housing, a brushless motor placed inside the housing, a drill bit connected to the output shaft of the brushless motor, and a controller. The controller drives the brushless motor through a motor drive circuit, and also includes a power supply to power the brushless motor.

[0004] It also includes a first handle, which is integrally formed with the housing, and the power supply is located inside the first handle;

[0005] It also includes a second handle. The bottom of the outer casing has a first slide rail. The second handle is at least partially located in the first slide rail and can slide in the first slide rail. The first slide rail has a plurality of slots spaced apart. The top of the second handle has a limiting part that cooperates with the slots. At least one slot is an inclined slot, and the inclination of the plurality of slots is different.

[0006] Through the above technical solution, this utility model is equipped with a second handle, which can be held with both hands during use, increasing the balance of the hand and making it easier to apply force. In addition, the distance and angle of the second handle are adjustable, which can adapt to the usage methods of various people.

[0007] It also includes a protection module. The controller is connected to the motor drive circuit via an optocoupler isolation circuit, and the motor drive circuit is connected to the controller via a protection circuit and a detection circuit. The protection circuit includes an overheat protection circuit and an overcurrent protection circuit.

[0008] Through the above technical solution, the overheat protection circuit and overcurrent protection circuit monitor the working temperature of the tool in real time. When an abnormally high temperature is detected, the tool's operating speed will be automatically reduced or it will temporarily stop working to prevent damage caused by overheating, ensure that the battery works within a safe temperature range, and prevent overcharging or over-discharging.

[0009] Preferably, the brushless motor includes a terminal block, which is provided with at least one first connector and at least one second connector. The first connector connects the brushless motor to the power supply via a power line, and the second connector connects the brushless motor to the power supply via a signal line. The power line and the signal line are fitted with anti-interference magnetic rings. An anti-interference partition is fixed on the terminal block, and the power line and the signal line are respectively located on both sides of the anti-interference partition.

[0010] By separating the power lines and signal lines on opposite sides, the interference caused by crossing can be reduced. Furthermore, the addition of an anti-interference magnetic ring can enhance the anti-interference effect and ensure the stable operation of the brushless motor.

[0011] The power supply also includes a charging circuit, which comprises a transformer and a constant voltage and constant current circuit. By incorporating a high-frequency transformer and a constant voltage and constant current circuit into the charging circuit, efficient charging of the lithium battery pack is achieved. Furthermore, a rectifier and filter circuit is equipped to convert AC power into DC power suitable for lithium battery charging, effectively reducing electromagnetic interference.

[0012] Preferably, the limiting part has elastic arms on both sides at an angle to the limiting part, and each elastic arm has an arc-shaped protrusion. The inner wall of the slot has a groove that matches the arc-shaped protrusion, increasing the stability after limiting. Alternatively, a pin hole can be provided in the slot, allowing a pin to be inserted for fixing.

[0013] Compared with the prior art, the advantages of this utility model are: the utility model has a simple structure, strong anti-interference ability, and is equipped with existing protection circuits and charging circuits, which can better guarantee the stable operation of the brushless motor. Attached Figure Description

[0014] Figure 1 This is a three-dimensional exploded view of the cross-section of the first slide section of this utility model;

[0015] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0016] Figure 3 This is a circuit block diagram of the present invention;

[0017] Figure label:

[0018] 1. Housing; 2. Brushless motor; 3. Drill bit; 4. Controller; 5. Power supply; 6. First handle; 7. Second handle; 8. First slide rail; 9. Slot; 10. Inclined groove; 11. Spring arm; 12. Rounded protrusion;

[0019] 13 Protection module; 14 Motor drive circuit; 15 Detection circuit; 16 Overheat protection circuit; 17 Overcurrent protection circuit; 18 Terminal block; 19 First connector; 20 Second connector; 21 Power line; 22 Signal line; 23 Anti-interference magnetic ring; 24 Anti-interference partition; 25 Charging circuit; 26 Transformer; 27 Constant voltage and constant current circuit; 28 Optocoupler isolation circuit. Detailed Implementation

[0020] To enable those skilled in the art to better understand this utility model and to more clearly define the scope of protection claimed by this utility model, the present utility model is described in detail below with reference to certain specific embodiments. It should be noted that the following are only some specific embodiments of the present utility model concept, and are only a part of the embodiments of this utility model. The specific and direct description of related structures is only for the convenience of understanding this utility model, and the specific features do not necessarily or directly limit the scope of implementation of this utility model.

[0021] Referring to the accompanying drawings, the present invention adopts the following technical solution: an anti-interference brushless lithium battery drill gun, including a housing 1, a brushless motor 2 placed inside the housing 1, a drill bit 3 connected to the output shaft of the brushless motor 2, and a controller 4. The controller 4 drives the brushless motor 2 through a motor drive circuit 14, and also includes a power supply 5 to supply power to the brushless motor 2.

[0022] It also includes a first handle 6, which is integrally formed with the outer shell 1, and the power supply 5 is placed inside the first handle 6;

[0023] It also includes a second handle 7. The bottom of the outer shell 1 is provided with a first slide rail 8. The second handle 7 is at least partially located in the first slide rail 8 and can slide in the first slide rail 8. A plurality of slots 9 are spaced apart on the first slide rail 8. The top of the second handle 7 is provided with a limiting part that cooperates with the slots 9. At least one slot 9 is an inclined groove 10. The inclination of the plurality of slots 9 is different.

[0024] Through the above technical solution, the present invention is equipped with a second handle 7, which can be held with both hands during use, increasing the balance of the hand and making it easier to apply force. The distance and angle of the second handle 7 are adjustable, which can adapt to the usage methods of various people.

[0025] It also includes a protection module 13. The controller 4 is connected to the motor drive circuit 14 via an optocoupler isolation circuit 28. The motor drive circuit 14 is connected to the controller 4 via a protection circuit and a detection circuit 15. The protection circuit includes an overheat protection circuit 16 and an overcurrent protection circuit 17.

[0026] Through the above technical solution, the overheat protection circuit 16 and the overcurrent protection circuit 17 monitor the working temperature of the tool in real time. When an abnormally high temperature is detected, the tool's operating speed will be automatically reduced or the tool will be temporarily stopped to prevent damage caused by overheating, ensure that the battery operates within a safe temperature range, and prevent overcharging or over-discharging.

[0027] Preferably, the brushless motor 2 includes a terminal block 18, on which at least one first connector 19 and at least one second connector 20 are provided. The first connector 19 connects the brushless motor 2 to the power supply 5 via a power line 21, and the second connector 20 connects the brushless motor 2 to the power supply 5 via a signal line 22. The power line 21 and the signal line 22 are covered with anti-interference magnetic rings 23. An anti-interference partition 24 is fixed on the terminal block 18, and the power line 21 and the signal line 22 are respectively located on both sides of the anti-interference partition 24.

[0028] Through the above technical solution, the power line 21 and signal line 22 are separated on both sides to reduce crossover and mutual interference. Furthermore, the anti-interference magnetic ring 23 can enhance the anti-interference effect and ensure the stable operation of the brushless motor 2.

[0029] The power supply 5 also includes a charging circuit 25, which includes a transformer 26 and a constant voltage and constant current circuit 27. By adding a high-frequency transformer 26 and a constant voltage and constant current circuit 27 to the charging circuit 25, efficient charging of the lithium battery pack is achieved, and a rectifier and filter circuit is provided to convert the AC power into DC power suitable for charging the lithium battery, effectively reducing electromagnetic interference.

[0030] Preferably, the limiting part is provided with elastic arms 11 at an angle to the limiting part on both sides, and the elastic arms 11 are provided with arc protrusions 12. The inner wall of the slot 9 is provided with grooves that cooperate with the arc protrusions 12 to increase the stability after limiting. Alternatively, a pin hole can be provided in the slot 9 to be inserted to achieve fixation.

[0031] Compared with the prior art, the advantages of this utility model are: the utility model has a simple structure, strong anti-interference ability, and is equipped with existing protection circuit and charging circuit 25, which can better guarantee the stable operation of the brushless motor 2.

[0032] In the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. An anti-interference brushless lithium-ion battery drill, comprising a housing (1), a brushless motor (2) housed within the housing (1), a drill bit (3) connected to the output shaft of the brushless motor (2), and a controller (4), wherein the controller (4) drives the brushless motor (2) via a motor drive circuit (14), and further comprising a power supply (5) for supplying power to the brushless motor (2); characterized in that: It also includes a first handle (6), which is integrally formed with the outer shell (1), and the power supply (5) is placed inside the first handle (6); It also includes a second handle (7), the bottom of the outer shell (1) is provided with a first slide (8), the second handle (7) is at least partially located in the first slide (8) and can slide in the first slide (8), a plurality of slots (9) are spaced apart on the first slide (8), the top of the second handle (7) is provided with a limiting part that cooperates with the slots (9), at least one slot (9) is an inclined groove (10), and the inclination of the plurality of slots (9) is different.

2. The anti-interference brushless lithium battery drill gun according to claim 1, characterized in that: It also includes a protection module (13), and the controller (4) is connected to the motor drive circuit (14) through an optocoupler isolation circuit (28). The motor drive circuit (14) is connected to the controller (4) through the protection circuit and the detection circuit (15).

3. The anti-interference brushless lithium battery drill gun according to claim 2, characterized in that: The protection circuit includes an overheat protection circuit (16) and an overcurrent protection circuit (17).

4. The anti-interference brushless lithium battery drill gun according to claim 1, characterized in that: The brushless motor (2) includes a terminal block (18), on which at least one first connector (19) and at least one second connector (20) are provided. The first connector (19) is connected to the brushless motor (2) and the power supply (5) through a power line (21), and the second connector (20) is connected to the brushless motor (2) and the power supply (5) through a signal line (22). The power line (21) and the signal line (22) are covered with an anti-interference magnetic ring (23). An anti-interference partition (24) is fixed on the terminal block (18), and the power line (21) and the signal line (22) are respectively located on both sides of the anti-interference partition (24).

5. The anti-interference brushless lithium battery drill gun according to claim 1, characterized in that: The power supply (5) also includes a charging circuit (25), which includes a transformer (26) and a constant voltage and constant current circuit (27).

6. The anti-interference brushless lithium battery drill gun according to claim 1, characterized in that: The limiting part is provided with spring arms (11) on both sides at an angle to the limiting part. The spring arms (11) are provided with arc protrusions (12). The inner wall of the slot (9) is provided with grooves that cooperate with the arc protrusions (12).

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