Automatic speed change lithium electric drill

Abstract

The utility model provides an automatic speed change lithium electric drill. Comprising a main machine and a threading die fixing ring, one end of the threading die fixing ring is slidably connected with a plurality of threading dies, one ends of the threading dies are movably connected with a butt joint ring, first balls are movably connected to the lower portion of the butt joint ring, one ends of the first balls are movably connected with a supporting ring, and one end of the supporting ring is fixedly connected with a plurality of lifting rods; one end of the host is fixedly connected with a potentiometer, one side of the potentiometer is slidably connected with a sliding contact, one end of the sliding contact is electrically connected with the host, one end of the threading die fixing ring is rotatably connected with a fastening ferrule, and one end of the fastening ferrule is in threaded connection with the threading die; the screw die for clamping the large drill bit is located below the screw die fixing ring so that the motor can rotate at a low speed, the screw die for clamping the small drill bit is located above the screw die fixing ring so that the motor can rotate at a high speed, a main machine can change the drilling speed in a self-adaptive mode according to the size and model of the clamped drill bit, safety in construction is improved, and the drill bit is prevented from being broken.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium electric drills, in particular to an automatic speed-changing lithium electric drill. Background Art

[0002] A lithium-ion drill is an electric tool that uses lithium-ion batteries as a power source. Compared with traditional electric drills, it has higher energy density, lighter volume, less memory effect and longer service life. The emergence of lithium-ion drills has greatly improved the work experience and efficiency of workers. In actual use, lithium-ion drills are used with drill bits of different sizes for construction. However, because drill bits of different sizes have different drilling speeds, users need to adjust the drilling speed after installing the drill bit. If the construction worker forgets to adjust the drilling speed, the drill bit may break, affecting the construction progress and causing property losses.

[0003] After searching, the Chinese patent publication number CN114850534A discloses a continuously variable speed rechargeable hand drill, including a hand drill housing, a battery housing fixedly connected to the surface of the hand drill housing, a rechargeable battery disposed inside the battery housing, and a drill driving clamping head fixedly mounted on one end of the hand drill housing. The continuously variable speed rechargeable hand drill is provided with a speed change mechanism, and when in use, the speed change knob drives the worm to rotate, drives the worm wheel to rotate, and drives the first regulating piston and the second regulating piston to move.

[0004] In view of the lack of the function of adjusting the drilling speed of the electric drill according to the size of the installed drill bit in the above-mentioned technology, the risk of the drill bit breaking when the user forgets to adjust the drilling speed of the electric drill cannot be avoided; therefore, an automatic speed-changing lithium-ion electric drill is proposed. Utility Model Content

[0005] In view of this, the embodiments of the present utility model hope to provide an automatic speed-changing lithium-ion electric drill to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial choice.

[0006] The technical solution of the embodiment of the utility model is achieved as follows: it includes a main machine and a die fixing ring, one end of the die fixing ring is slidably connected to multiple dies, one end of the die is movably connected to a docking ring, a ball is movably connected below the docking ring, one end of the ball is movably connected to a support ring, one end of the support ring is fixedly connected to multiple lifting rods, one end of the lifting rods is fixedly connected to a limiting rod, one end of the main machine is fixedly connected to a potentiometer, one side of the potentiometer is slidably connected to a sliding contact, and one end of the sliding contact is electrically connected to the main machine.

[0007] In some embodiments, one end of the die fixing ring is rotatably connected to a fastening ring, one end of the fastening ring is threadedly connected to the die, one end of the fastening ring is provided with a plurality of docking grooves, one end of the docking groove is fixedly connected to a rotating sleeve, and one end of the rotating sleeve is rotatably connected to a protective sleeve.

[0008] In some embodiments, one end of the protective sleeve is fixedly connected to a plurality of limit rods, one end of the limit rod is slidably connected to the lifting rod, and one end of the lifting rod and the limit rod is fixedly connected to a spring.

[0009] In some embodiments, one end of the host is rotatably connected to a rotating component, and one end of the rotating component is fixedly connected to a docking sleeve.

[0010] In some embodiments, one end of the die fixing ring is fixedly connected to a connecting shaft, and one end of the connecting shaft is provided with a connecting slot and a driving slot.

[0011] In some embodiments, one end of the docking sleeve is movably connected to a second ball, and the outer side of the docking sleeve is slidably connected to a fixed sleeve.

[0012] In some embodiments, one end of the fixing sleeve is fixedly connected to a bearing, and one end of the fixing sleeve and the docking sleeve is fixedly connected to a spring 2.

[0013] In some embodiments, a connecting push plate is fixedly connected to the outer side of the bearing, and one end of the connecting push plate is slidably connected to the protective sleeve.

[0014] The embodiment of the utility model has the following advantages due to the adoption of the above technical solution:

[0015] The utility model can allow the motor to rotate at a low speed when the die position of a large drill bit is located below the die fixing ring, and can allow the motor to rotate at a high speed when the die position of a small drill bit is located above the die fixing ring, so that the main machine can adaptively change the drilling speed according to the size and model of the clamped drill bit, thereby improving safety during construction and preventing the drill bit from breaking.

[0016] The connecting shaft has magnetic force and can be inserted into the docking sleeve for adsorption, and the rectangular driving groove can realize the driving of the die fixing ring, so that the connecting shaft can be quickly installed.

[0017] By pulling off the fixing sleeve, the connecting shaft can be quickly removed to replace different die fixing rings and dies for clamping different types of drill bits.

[0018] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is the main structural diagram of the utility model.

[0021] Figure 2 It is a schematic diagram of the die disassembly structure of the utility model.

[0022] Figure 3 This is a cross-sectional structural diagram of the extruded plate of the utility model.

[0023] Figure 4 This is a diagram showing the internal structure of the protective shell of the present utility model.

[0024] Figure 5 This is a diagram showing the internal structure of the connecting sleeve of the present utility model.

[0025] 1. Main machine; 2. Protective cover; 3. Die fixing ring; 4. Die; 5. Connecting push plate; 6. Rotating sleeve; 7. Rotating part; 8. Fastening ring; 9. Docking groove; 10. Connecting shaft; 11. Lifting rod; 12. Limit rod; 13. Spring 1; 14. Docking ring; 15. Support ring; 16. Ball 1; 17. Connecting slot; 18. Driving slot; 19. Potentiometer; 20. Sliding contact; 21. Bearing; 22. Docking sleeve; 23. Ball 2; 24. Spring 2; 25. Fixed sleeve. DETAILED DESCRIPTION

[0026] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0027] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings. Embodiment 1:

[0028] like Figure 1-5As shown, an automatic speed-changing lithium-ion electric drill comprises a main unit 1 and a die fixing ring 3, wherein one end of the die fixing ring 3 is slidably connected to a plurality of dies 4, one end of the die 4 is movably connected to a docking ring 14, a ball bearing 16 is movably connected below the docking ring 14, one end of the ball bearing 16 is movably connected to a support ring 15, one end of the support ring 15 is fixedly connected to a plurality of lifting rods 11, one end of the lifting rods 11 is fixedly connected to a limit rod 12, one end of the main unit 1 is fixedly connected to a potentiometer 19, one side of the potentiometer 19 is slidably connected to a sliding contact 20, and one end of the sliding contact 20 is electrically connected to the main unit 1.

[0029] There is a motor shell in the main unit 1 to drive the die fixing ring 3 to rotate, and the die 4 moves up and down in the die fixing ring 3 to achieve the effect of clamping the drill bit. When installing the drill bit on the device, it is necessary to move multiple dies 4 downward first, and then insert the drill bit for clamping. In this process, the sliding contact 20 will be driven to move up and down. The sliding contact 20 and the upper end of the potentiometer 19 are electrically connected to the internal motor of the main unit 1, which can control the output power of the internal motor. When the sliding contact 20 is located at the bottom, the resistance is greater, the motor output power is smaller and the speed is slower, which is suitable for large drill bits. On the contrary, when the sliding contact 20 is located at the top, the resistance is small and the motor speed is faster, which is suitable for small drill bits.

[0030] When the die 4 for clamping a large drill bit is located at the bottom, the motor can rotate at a low speed. When the die 4 for clamping a small drill bit is located at the top, the motor can rotate at a high speed. The host 1 can adaptively change the drilling speed according to the size of the clamped drill bit, thereby improving safety during construction and preventing the drill bit from breaking.

[0031] The ball bearing 16 can allow the support ring 15 and the docking ring 14 to slide relative to each other smoothly, thereby preventing the rotation of the claw 4 and the drill bit from being affected.

[0032] In this embodiment, one end of the die fixing ring 3 is rotatably connected to a fastening ring 8, one end of the fastening ring 8 is threadedly connected to the die 4, one end of the fastening ring 8 is provided with a plurality of docking grooves 9, one end of the docking groove 9 is fixedly connected to a rotating sleeve 6, and one end of the rotating sleeve 6 is rotatably connected to a protective sleeve 2.

[0033] The die 4 can be driven to clamp by rotating the rotating sleeve 6. Since the groove on one side of the die fixing ring 3 is inclined, the die 4 can clamp the drill bit inwardly when moving.

[0034] In this embodiment, one end of the protective sleeve 2 is fixedly connected to a plurality of limit rods 12, one end of the limit rod 12 is slidably connected to the lifting rod 11, and one end of the lifting rod 11 and the limit rod 12 is fixedly connected to a spring 13;

[0035] The spring 13 can press the lifting rod 11 upward, so that the sliding contact 20 and the docking ring 14 can move upward along with the die 4 to adjust the rotation speed of the host 1.

[0036] In this embodiment, one end of the main machine 1 is rotatably connected to a rotating component 7 , and one end of the rotating component 7 is fixedly connected to a docking sleeve 22 .

[0037] One end of the die fixing ring 3 is fixedly connected with a connecting shaft 10 , and one end of the connecting shaft 10 is provided with a connecting slot 17 and a driving slot 18 .

[0038] The connecting shaft 10 has magnetic force and can be inserted into the docking sleeve 22 for adsorption, and the rectangular driving groove 18 can realize the driving of the die fixing ring 3.

[0039] In this embodiment, a ball bearing 23 is movably connected to one end of the docking sleeve 22 , and a fixing sleeve 25 is slidably connected to the outer side of the docking sleeve 22 .

[0040] When the fixing sleeve 25 is pushed upward, the ball 23 can be stuck in the docking sleeve 22 and the connecting slot 17 to fix the connecting shaft 10 to prevent it from falling off. The fixing sleeve 25 can be pulled off to quickly remove the connecting shaft 10 and replace different die fixing rings 3 and die 4 for clamping different types of drill bits.

[0041] In this embodiment: a motor housing is provided in the main engine 1 to drive the die fixing ring 3 to rotate, and the die 4 is moved up and down in the die fixing ring 3 to achieve the effect of clamping the drill bit. When installing the drill bit on the device, it is necessary to first move multiple dies 4 downward, and then insert the drill bit for clamping. In this process, the sliding contact 20 will be driven to move up and down. The sliding contact 20 and the upper end of the potentiometer 19 are electrically connected to the internal motor of the main engine 1, and the output power of the internal motor can be controlled. When the sliding contact 20 is located at the bottom, the resistance is greater, the motor output power is smaller and the speed is slower, which is suitable for large drill bits. On the contrary, when the sliding contact 20 is located at the top, the resistance is small and the motor speed is faster, which is suitable for small drill bits.

[0042] When the die 4 for clamping a large drill bit is located at the bottom, the motor can rotate at a low speed. When the die 4 for clamping a small drill bit is located at the top, the motor can rotate at a high speed. The host 1 can adaptively change the drilling speed according to the size of the clamped drill bit, thereby improving safety during construction and preventing the drill bit from breaking.

[0043] The ball bearing 16 can allow the support ring 15 and the docking ring 14 to slide relative to each other smoothly, thereby preventing the rotation of the claw 4 and the drill bit from being affected.

[0044] The die 4 can be driven to clamp by rotating the rotating sleeve 6. Since the groove on one side of the die fixing ring 3 is inclined, the die 4 can clamp the drill bit inwardly when moving.

[0045] The spring 13 can press the lifting rod 11 upward, so that the sliding contact 20 and the docking ring 14 can move upward along with the die 4 to adjust the rotation speed of the host 1.

[0046] The connecting shaft 10 has magnetic force and can be inserted into the docking sleeve 22 for adsorption, and the rectangular driving groove 18 can realize the driving of the die fixing ring 3.

[0047] When the fixing sleeve 25 is pushed upward, the ball 23 can be stuck in the docking sleeve 22 and the connecting slot 17 to fix the connecting shaft 10 to prevent it from falling off. The fixing sleeve 25 can be pulled off to quickly remove the connecting shaft 10 and replace different die fixing rings 3 and die 4 for clamping different types of drill bits. Embodiment 2:

[0048] An automatic speed-changing lithium-ion electric drill. This embodiment makes the following improvements on the basis of embodiment 1: Figure 1-5 As shown,

[0049] In this embodiment, one end of the fixing sleeve 25 is fixedly connected to the bearing 21 , and one end of the fixing sleeve 25 and the docking sleeve 22 is fixedly connected to a spring 24 .

[0050] The second spring 24 can automatically press the fixed sleeve 25 upward to prevent the connecting shaft 10 from falling off. The outer side of the bearing 21 is fixedly connected with a connecting push plate 5, and one end of the connecting push plate 5 is slidably connected to the protective sleeve 2.

[0051] The connecting push plate 5 can be convenient for a person to press the fixing sleeve 25 from the outside to remove the connecting shaft 10 , and the bearing 21 can prevent the connecting push plate 5 from affecting the fixing sleeve 25 from rotating along with the docking sleeve 22 .

[0052] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An automatic speed-changing lithium-ion electric drill, comprising a main unit (1) and a die fixing ring (3), characterized in that: One end of the die fixing ring (3) is slidably connected to a plurality of die plates (4); one end of the die plates (4) is movably connected to a docking ring (14); a ball bearing (16) is movably connected below the docking ring (14); one end of the ball bearing (16) is movably connected to a support ring (15); one end of the support ring (15) is fixedly connected to a plurality of lifting rods (11); one end of one side of the lifting rods (11) is fixedly connected to a limit rod (12); one end of the main machine (1) is fixedly connected to a potentiometer (19); one side of the potentiometer (19) is slidably connected to a sliding contact (20); one end of the sliding contact (20) is electrically connected to the main machine (1).

2. The automatic speed-changing lithium-ion electric drill according to claim 1, characterized in that: One end of the die fixing ring (3) is rotatably connected to a fastening ring (8), one end of the fastening ring (8) is threadedly connected to the die (4), one end of the fastening ring (8) is provided with a plurality of docking grooves (9), one end of the docking groove (9) is fixedly connected to a rotating sleeve (6), and one end of the rotating sleeve (6) is rotatably connected to a protective sleeve (2).

3. The automatic speed-changing lithium-ion electric drill according to claim 2, characterized in that: One end of the protective sleeve (2) is fixedly connected to a plurality of limit rods (12), one end of the limit rod (12) is slidably connected to the lifting rod (11), and one end of the lifting rod (11) and the limit rod (12) is fixedly connected to a spring 1 (13).

4. The automatic speed-changing lithium-ion electric drill according to claim 3, characterized in that: One end of the main machine (1) is rotatably connected to a rotating component (7), and one end of the rotating component (7) is fixedly connected to a docking sleeve (22).

5. The automatic speed-changing lithium-ion electric drill according to claim 3, characterized in that: One end of the die fixing ring (3) is fixedly connected to a connecting shaft (10), and one end of the connecting shaft (10) is provided with a connecting slot (17) and a driving slot (18).

6. The automatic speed-changing lithium-ion electric drill according to claim 4, characterized in that: One end of the butt joint sleeve (22) is movably connected to a second ball bearing (23), and the outer side of the butt joint sleeve (22) is slidably connected to a fixed sleeve (25).

7. The automatic speed-changing lithium-ion electric drill according to claim 6, characterized in that: One end of the fixed sleeve (25) is fixedly connected to the bearing (21), and one end of the fixed sleeve (25) and the butt sleeve (22) is fixedly connected to a second spring (24).

8. The automatic speed-changing lithium-ion electric drill according to claim 7, characterized in that: A connecting push plate (5) is fixedly connected to the outer side of the bearing (21), and one end of the connecting push plate (5) is slidably connected to the protective sleeve (2).

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