A motor for an electric drill

Abstract

The utility model belongs to motor technical field especially is a motor for electric drill, in order to avoid the motor body of sustained output to cause the inside sustained heating of electric drill shell, thereby influence the service life of motor body, the inside electric telescopic handle of the device is self -starting when drill bit is stuck, its output end promotes connecting rod, and connecting rod drives the rotating disc of outside to push out second radiating disc to the outside, and the hinge end surface of multiple torsional spring hinges is resisted in the periphery of second radiating disc, and second radiating disc can exist moderate gap between first fixed disc, accelerate heat dissipation simultaneously, make the drill bit that stuck and first fixed disc separate, and then prevent the motor body from generating overheating phenomenon, when radiating is completed, the rotating disc is recycled to the electric telescopic handle inside the counter -starting, under the action of torsional spring, the torsional spring hinge will second radiating disc be pushed back to the original position again, make the nylon clamp block of first fixed disc be inserted firmly into the slot inside, and then complete the quick connection of first fixed disc and second radiating disc.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically relating to a motor for electric drills. Background Technology

[0002] A hand drill is a portable small drilling tool consisting of a small electric motor, a control switch, a drill chuck, and a drill bit. It drives the working device through a transmission mechanism, which in turn drives the gears to increase the power of the drill bit, thereby enabling the drill bit to scrape the surface of an object and penetrate it more effectively.

[0003] A search revealed that CN216625452U discloses a motor for an electric drill. This invention utilizes a connecting box, a locking rod, a limiting groove, a spring, a circular ring, a dust collection component, and a dust collection port. One end of the connecting box is inserted into the protective shell, the locking rod moves along the limiting groove, and one end of the connecting box presses against the circular ring and the spring. Rotating the connecting box resets the circular ring, causing the locking rod and the limiting groove to engage. The dust collection component and the dust collection port adsorb dust that cannot be blocked, thus achieving a dust-proof effect. However, during use, the drill bit often gets stuck. Even then, the motor continues to output power, causing continuous internal heating, which affects the motor's lifespan and may even damage it.

[0004] Therefore, a motor for electric drills is designed to solve the above problems. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides a motor for electric drills. When using an electric drill, the drill bit often gets stuck. To prevent the continuous output of the motor body from causing continuous heating inside the drill housing, thus affecting the motor's lifespan, this device automatically activates an internal electric telescopic rod when the drill bit gets stuck. Its output end pushes a connecting rod, which in turn drives an outer rotating disc to push the second heat dissipation plate outward. The hinge ends of multiple sets of torsion spring hinges abut against the outer periphery of the second heat dissipation plate. A suitable gap exists between the second heat dissipation plate and the first fixed plate, accelerating heat dissipation while separating the stuck drill bit from the first fixed plate, thereby preventing the motor body from overheating.

[0006] During installation, one end of the drill bit can be inserted into the snap-fit ​​connector of the second heat sink along the inside of the drill housing. After heat dissipation is complete, the electric telescopic rod inside the reverse start will retract the rotating disk. Under the force of the torsion spring, the torsion spring hinge will push the second heat sink back to its original position, so that the nylon snap-fit ​​of the first fixed disk is firmly inserted into the slot, thereby completing the quick connection of the first fixed disk and the second heat sink. During the rotation, the first fixed disk and the second heat sink always rotate inside the socket, and their contact surfaces are smooth, thereby improving the stability of the connection and preventing excessive shaking of the motor body during operation, which would reduce its service life.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a motor for an electric drill, comprising an electric drill housing, wherein a rapid heat dissipation motor is installed inside the electric drill housing. The rapid heat dissipation motor includes a motor body, an output shaft, a socket plate, a torsion spring hinge, a first fixing plate, and a second heat dissipation plate. The motor body is threadedly connected to the inside of the electric drill housing. One end of the output shaft is fixedly connected to the motor shaft of the motor body via a coupling. The outer side of the socket plate is fixedly connected to the inner surface of the electric drill housing. The torsion spring hinge is rotatably connected to the outer side of the socket plate. The middle part of one side of the first fixing plate is fixedly connected to the outer side of the output shaft. The inner side of the second heat dissipation plate is inserted into the outer surface of the first fixing plate.

[0008] As a preferred embodiment of the electric drill motor of this utility model, a nylon clip is also fixedly connected to the outer side of the first fixed plate. Several sets of the nylon clip are provided, and the several sets of the nylon clip are arranged in a ring array on the outer side of the first fixed plate.

[0009] As a preferred embodiment of the electric drill motor of this utility model, the second heat sink is further provided with a slot that matches the size of the nylon clip on the side near the first fixed plate.

[0010] As a preferred embodiment of the electric drill motor of this utility model, the first fixed plate is further provided with an electric telescopic rod, a connecting rod and a rotating disk. The output end of the electric telescopic rod is fixedly connected to the inner side of the connecting rod, and the middle part of the rotating disk is fixedly connected to the outer side of the connecting rod.

[0011] As a preferred embodiment of the electric drill motor of this utility model, the second heat sink is further provided with a blind hole with an inner diameter equal to that of the rotating disk.

[0012] As a preferred embodiment of the electric drill motor of this utility model, a snap-fit ​​connector is also fixedly connected to the outer side of the second heat sink.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. In this utility model, in order to avoid the continuous output of the motor body causing continuous heating inside the electric drill housing, thereby affecting the service life of the motor body, when the drill bit is stuck, the internal electric telescopic rod is automatically activated. Its output end pushes the connecting rod, and the connecting rod drives the outer rotating disk to push the second heat dissipation plate outward. The hinge end faces of multiple sets of torsion spring hinges abut against the outer periphery of the second heat dissipation plate. The second heat dissipation plate can have an appropriate gap with the first fixed plate, which accelerates heat dissipation and separates the stuck drill bit from the first fixed plate, thereby preventing the motor body from overheating.

[0015] 2. In this utility model, after the heat dissipation is completed, the electric telescopic rod inside the reverse starter retracts the rotating disk. Under the action of the torsion spring, the torsion spring hinge pushes the second heat dissipation disk back to its original position, so that the nylon clip of the first fixed disk is firmly inserted into the slot, thereby completing the quick connection between the first fixed disk and the second heat dissipation disk. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the interior of the electric drill housing in this utility model;

[0019] Figure 3 This is a schematic diagram of the torsion spring hinge in this utility model;

[0020] Figure 4 This is an exploded view of the first fixing plate and the second heat dissipation plate in this utility model;

[0021] Figure 5 This is a distribution diagram of the electric telescopic rod in this utility model;

[0022] In the picture:

[0023] 1. Drill housing; 2. High-speed cooling motor; 21. Motor body; 22. Output shaft; 23. Connecting plate; 24. Torsion spring hinge; 25. First fixing plate; 26. Second cooling plate; 3. Nylon retaining block; 4. Slot; 5. Electric telescopic rod; 6. Connecting rod; 7. Rotating plate; 8. Blind hole; 9. Connecting connector; 10. Drill bit. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0025] like Figure 1 As shown:

[0026] A drill motor, as described in CN216625452U, comprises a connecting box, a locking rod, a limiting groove, a spring, a circular ring, a dust collection component, and a dust collection port. One end of the connecting box is inserted into a protective shell, and the locking rod moves along the limiting groove. One end of the connecting box presses against the circular ring and the spring. Rotating the connecting box resets the circular ring, causing the locking rod and the limiting groove to engage. The dust collection component and the dust collection port adsorb dust that cannot be blocked, thus achieving a dust-proof effect. However, during use, the drill bit often gets stuck. At this time, the motor continues to output power, causing continuous heating inside the motor, which affects the service life of the motor and may even damage it. Based on this, a fast-heat dissipation motor 2 is added.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown:

[0028] In an optional embodiment: the fast heat dissipation motor 2 includes a motor body 21, an output shaft 22, a socket 23, a torsion spring hinge 24, a first fixing plate 25, and a second heat dissipation plate 26. The motor body 21 is threadedly connected to the inside of the drill housing 1. One end of the output shaft 22 is fixedly connected to the motor shaft of the motor body 21 via a coupling. The outer side of the socket 23 is fixedly connected to the inner surface of the drill housing 1. The torsion spring hinge 24 is rotatably connected to the outer side of the socket 23. The middle part of one side of the first fixing plate 25 is fixedly connected to the outer side of the output shaft 22. The inner side of the second heat dissipation plate 26 is inserted into the outer surface of the first fixing plate 25. A snap-fit ​​connector 9 is also fixedly connected to the outer side of the second heat dissipation plate 26.

[0029] In this implementation scheme: When using an electric drill, the drill bit 10 often gets stuck. To prevent the continuous output of the motor body 21 from causing continuous heating inside the drill housing 1, thereby affecting the service life of the motor body 21, when the drill bit gets stuck, the internal electric telescopic rod 5 starts automatically. Its output end pushes the connecting rod 6. The connecting rod 6 drives the outer rotating disk 7 to push the second heat dissipation disk 26 outward. The hinge end faces of multiple sets of torsion spring hinges 24 abut against the outer periphery of the second heat dissipation disk 26. The second heat dissipation disk 26 can have an appropriate gap with the first fixed disk 25, which accelerates heat dissipation and separates the stuck drill bit 10 from the first fixed disk 25, thereby preventing the motor body 21 from overheating.

[0030] Furthermore:

[0031] like Figure 1 , Figure 3 and Figure 4 As shown:

[0032] In an optional embodiment: a nylon clip 3 is fixedly connected to the outer side of the first fixed plate 25. Several sets of nylon clips 3 are arranged in a ring array on the outer side of the first fixed plate 25. The second heat sink 26 is also provided with a slot 4 that matches the size of the nylon clip 3 on the side close to the first fixed plate 25. The interior of the first fixed plate 25 is also provided with an electric telescopic rod 5, a connecting rod 6 and a rotating plate 7. The output end of the electric telescopic rod 5 is fixedly connected to the inner side of the connecting rod 6. The middle part of the rotating plate 7 is fixedly connected to the outer side of the connecting rod 6. The interior of the second heat sink 26 is also provided with a blind hole 8 with an inner diameter equal to that of the rotating plate 7.

[0033] In this embodiment: During installation, one end of the drill bit 10 can be inserted into the snap-fit ​​connector 9 of the second heat sink 26 along the inside of the electric drill housing 1. After heat dissipation is completed, the electric telescopic rod 5 inside the reverse start will retract the rotating disk 7. Under the action of the torsion spring, the torsion spring hinge 24 will push the second heat sink 26 back to its original position, so that the nylon snap-fit ​​block 3 of the first fixed disk 25 is firmly inserted into the slot 4, thereby completing the quick connection of the first fixed disk 25 and the second heat sink 26. During the rotation, the first fixed disk 25 and the second heat sink 26 always rotate inside the socket 23, and their contact surface is a smooth surface, thereby improving the stability of the connection and preventing the motor body 21 from shaking excessively during operation and reducing its service life.

[0034] It should be noted that the nylon clip 3 made of nylon material has good high temperature resistance, which allows the device to maintain certain physical properties even at high temperatures.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A motor for an electric drill, comprising a drill housing (1), wherein a fast-heat dissipation motor (2) is installed inside the drill housing (1), characterized in that: The fast heat dissipation motor (2) includes a motor body (21), an output shaft (22), a socket (23), a torsion spring hinge (24), a first fixed plate (25), and a second heat dissipation plate (26). The motor body (21) is threadedly connected to the inside of the electric drill housing (1). One end of the output shaft (22) is fixedly connected to the motor shaft of the motor body (21) through a coupling. The outer side of the socket (23) is fixedly connected to the inner surface of the electric drill housing (1). The torsion spring hinge (24) is rotatably connected to the outer side of the socket (23). The middle part of one side of the first fixed plate (25) is fixedly connected to the outer side of the output shaft (22). The inner side of the second heat dissipation plate (26) is inserted into the outer surface of the first fixed plate (25). A nylon clip (3) is also fixedly connected to the outside of the first fixed disk (25). Several sets of the nylon clip (3) are provided, and the several sets of the nylon clip (3) are arranged in a ring array on the outside of the first fixed disk (25). The second heat sink (26) is also provided with a slot (4) that is compatible with the size of the nylon card block (3) on the side near the first fixed plate (25); The first fixed plate (25) is also provided with an electric telescopic rod (5), a connecting rod (6) and a rotating plate (7). The output end of the electric telescopic rod (5) is fixedly connected to the inner side of the connecting rod (6), and the middle part of the rotating plate (7) is fixedly connected to the outer side of the connecting rod (6).

2. The electric drill motor according to claim 1, characterized in that: The second heat sink (26) also has a blind hole (8) with an inner diameter equal to that of the rotating disk (7).

3. The electric drill motor according to claim 2, characterized in that: The outer side of the second heat sink (26) is also fixedly connected to a snap connector (9).

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