Quick drill bit mounting and demounting device for lithium battery electric hammer

Abstract

The utility model provides a kind of lithium electric hammer quick drill device of mounting and dismounting. Including electric hammer body, the electric hammer body below is provided with handle, the output end of the electric hammer body is connected with output shaft, the output shaft is provided with connecting groove, the output shaft is provided with limit slot, the limit slot is slidably installed with top block, the connecting groove is inserted with connecting block, the connecting block is provided with arc clamping slot. In the utility model, by setting the quick mounting and dismounting mechanism of drill bit, the convenient replacement of drill bit can be realized in actual operation. When installing, only need to pull the stop plate and insert drill bit, loosen the stop plate to automatically complete fixing;When disassembling, only need to pull the stop plate and directly pull out the drill bit, without the aid of special tools or other complex operation. The structure greatly reduces the time of single drill replacement, significantly reduces non-operation time, improves construction continuity, suitable for multi-scene high-frequency drill replacement demand, and has high practicability.

Description

Technical Field

[0001] This utility model relates to the field of power tools, and in particular to a quick-load and unload device for lithium-ion electric hammer drill bits, belonging to the field of mechanical engineering technology. Background Technology

[0002] A lithium-ion electric hammer quick-load drill bit device is a mechanical structural component installed on a lithium-ion electric hammer (an electric hammer tool powered by a lithium battery) to enable the quick installation and removal of drill bits.

[0003] Publication number CN208645234U discloses a lithium-ion electric hammer, including a hammer body, a protective shell, and a handle. A mounting block is fixed to the middle of one side of the hammer body, and a groove is formed on the lower end face of the mounting block. The upper end of the protective shell is slidably mounted in the groove via a slide rail. Movable doors are movably mounted on both upper sides of the protective shell via spring hinges. A fixing buckle is fixed to the middle of the side of each movable door opposite to the spring hinge. A vent is formed in the middle of each movable door. A lithium battery is fixed inside the protective shell, and a second power interface is formed on the lower side of one side of the lithium battery, which is connected to the protective shell. A switch is embedded in the upper interior of the handle of the hammer body. This lithium-ion electric hammer facilitates heat dissipation of the lithium battery, increasing its lifespan.

[0004] However, neither this type of lithium-ion hammer drill nor existing lithium-ion hammer drills are equipped with a quick-release mechanism for drill bits. The disassembly of traditional lithium-ion battery drill bits requires the use of tools such as wrenches to loosen the chuck nut, or to complete the operation by repeatedly rotating and pressing the chuck. This process is not only cumbersome and time-consuming, but also affects the continuity of construction due to frequent machine downtime, especially in scenarios where drill bits are changed frequently (such as drilling holes in multiple materials), thus requiring improvement.

[0005] To address this, a rapid loading and unloading device for lithium-ion electric hammer drill bits is proposed. Utility Model Content

[0006] In view of this, the present invention provides a lithium-ion electric hammer quick loading and unloading drill bit device to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial option.

[0007] The technical solution of this utility model is implemented as follows: A lithium-ion electric hammer quick-load and unload drill bit device includes an electric hammer body, a handle is provided at the bottom of the electric hammer body, an output shaft is connected to the output end of the electric hammer body, a connecting groove is provided in the output shaft, a limit groove is provided in the output shaft, a top block is slidably installed in the limit groove, a connecting block is inserted in the connecting groove, an arc-shaped slot is provided in the connecting block, an annular plate is installed on the output shaft, a sleeve plate is installed on the annular plate, an inner plate is slidably installed in the sleeve plate, a stop plate is installed in the inner plate, a protrusion is installed on the stop plate, a guide rod is installed in the annular plate, the protrusion is slidably installed on the guide rod, a spring A is sleeved on the guide rod, a stud is installed on the inner plate, a groove plate is provided in the sleeve plate, and a threaded sleeve is threadedly connected to the stud.

[0008] More preferably, the abutment is slidably mounted on the output shaft, and the top block is provided with an arc surface.

[0009] More preferably, the connecting groove is provided with a horizontal rib groove, and the connecting block is equipped with a rib structure that matches the rib groove.

[0010] More preferably, one end of the spring A is mounted on the protrusion, and the other end of the spring A is mounted on the ring plate, and the spring A drives the abutment plate to cover the top block.

[0011] In a further preferred embodiment, the stud is disposed within the groove plate, and a lever is provided on the threaded sleeve.

[0012] In a further preferred embodiment, a guide plate is mounted on the grip, a slide rod is mounted on the guide plate, a moving block is slidably mounted on the slide rod, a spring B is sleeved on the slide rod, a connecting plate is hinged to the moving block via a pivot, an mounting block is hinged to the connecting block via a pivot, a grip plate is mounted on the mounting block, and a top rod is mounted on the grip plate, the top rod being slidably disposed within the guide plate.

[0013] More preferably, one end of the spring B is mounted on the moving block, and the other end of the spring B is mounted on the guide plate, and the spring B drives the moving block to tend towards the middle of the slide bar.

[0014] The present invention has the following advantages due to the adoption of the above technical solution:

[0015] I. This utility model, by setting a quick-release mechanism for drill bits, enables convenient replacement of drill bits during actual operation. During installation, simply pull the stop plate and insert the drill bit; releasing the stop plate automatically secures it. During disassembly, simply pull the stop plate and pull out the drill bit directly, without the need for special tools or other complex operations. This structure significantly reduces the time required for a single drill bit change, substantially reduces non-operational time, improves construction continuity, and is suitable for high-frequency drill bit replacement needs in multiple scenarios, demonstrating high practicality.

[0016] Second, by installing a buffer mechanism on the handle, this utility model can provide reliable hand protection for users under high-frequency vibration conditions of the electric hammer, absorb and dissipate the vibration energy generated during work, and especially in continuous operation scenarios, it can significantly reduce hand fatigue, effectively extend the single operation time, and improve work efficiency and user experience.

[0017] The above overview is for illustrative purposes 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 present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a side view of the present invention.

[0021] Figure 3 For the present utility model Figure 2 Middle section structural diagram;

[0022] Figure 4 This is an exploded view of the connecting block of this utility model;

[0023] Figure 5 For the present utility model Figure 4 Middle section structural diagram;

[0024] Figure 6 This is an exploded view of part of the structure of this utility model.

[0025] Reference numerals in the attached drawings: 1. Electric hammer body; 2. Handle; 3. Output shaft; 4. Connecting groove; 5. Limiting groove; 6. Top block; 7. Connecting block; 8. Arc-shaped groove; 9. Ring plate; 10. Sleeve plate; 11. Inner plate; 12. Abutment plate; 13. Protrusion; 14. Guide rod; 15. Spring A; 16. Stud; 17. Groove plate; 18. Threaded sleeve; 19. Grip plate; 20. Guide plate; 21. Slide rod; 22. Moving block; 23. Spring B; 24. Connecting plate; 25. Top rod; 26. Mounting block. Detailed Implementation

[0026] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0027] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0028] like Figure 1-6 As shown, this utility model embodiment provides a quick-loading and unloading drill bit device for a lithium-ion electric hammer, including an electric hammer body 1, a handle 2 disposed below the electric hammer body 1, an output shaft 3 connected to the output end of the electric hammer body 1, a connecting groove 4 disposed inside the output shaft 3, a limiting groove 5 disposed inside the output shaft 3, a top block 6 slidably installed inside the limiting groove 5, a connecting block 7 inserted into the connecting groove 4, an arc-shaped slot 8 disposed inside the connecting block 7, an annular plate 9 mounted on the output shaft 3, a sleeve plate 10 mounted on the annular plate 9, an inner plate 11 slidably mounted inside the sleeve plate 10, a stop plate 12 mounted inside the inner plate 11, a protrusion 13 mounted on the stop plate 12, a guide rod 14 mounted inside the annular plate 9, the protrusion 13 slidably mounted on the guide rod 14, a spring A15 sleeved on the guide rod 14, a stud 16 mounted on the inner plate 11, a grooved plate 17 disposed inside the sleeve plate 10, and a threaded sleeve 18 threadedly connected to the stud 16.

[0029] In one embodiment, the abutment plate 12 is slidably mounted on the output shaft 3, and the top block 6 is provided with an arc surface. The spring A15 resets and pushes the protrusion 13 to slide forward, causing the abutment plate 12 to come into contact with the top block 6. Under the combined action of the arc surface of the top block 6 and the pressure, the abutment plate 12 will press the top block 6 and drive it to slide inward along the limiting groove 5.

[0030] In one embodiment, a horizontal rib is provided in the connecting groove 4, and a rib structure adapted to the rib is installed on the connecting block 7. The connecting block 7 is aligned with the connecting groove 4 of the output shaft 3 and inserted, and the rib on the connecting block 7 engages with the rib in the connecting groove 4 to ensure that the drill bit and the output shaft 3 rotate synchronously (to prevent slippage).

[0031] In one embodiment, one end of spring A15 is mounted on protrusion 13, and the other end of spring A15 is mounted on ring plate 9. Spring A15 drives abutment plate 12 to cover top block 6. During the reset process, spring A15 pushes protrusion 13 to slide forward along guide rod 14.

[0032] In one embodiment, the stud 16 is disposed within the slot plate 17, and a lever is provided on the threaded sleeve 18. By rotating the threaded sleeve 18 with the lever, the threaded sleeve 18 reduces the top pressure on the inner plate 11 under the action of the thread, thereby reducing the sliding resistance of the inner plate 11.

[0033] In one embodiment, a guide plate 20 is mounted on the handle 2, a slide rod 21 is mounted on the guide plate 20, a moving block 22 is slidably mounted on the slide rod 21, a spring B23 is sleeved on the slide rod 21, a connecting plate 24 is hinged to the moving block 22 via a pivot, a mounting block 26 is hinged to the connecting plate 24 via a pivot, a grip plate 19 is mounted on the mounting block 26, and a push rod 25 is mounted on the grip plate 19. The push rod 25 is slidably disposed within the guide plate 20. By installing a buffer mechanism on the handle 2, reliable hand protection can be provided for the user under high-frequency vibration conditions of the electric hammer, absorbing and dissipating the vibration energy generated during work. Especially in continuous operation scenarios, it can significantly reduce hand fatigue.

[0034] In one embodiment, one end of spring B23 is mounted on the movable block 22, and the other end of spring B23 is mounted on the guide plate 20. Spring B23 drives the movable block 22 to tend towards the middle of the slide bar 21. When spring B23 is compressed, it generates a reverse elastic force, which cancels out the inertial force of the movable block 22.

[0035] When this utility model is in operation: when the drill bit needs to be installed, firstly rotate the threaded sleeve 18 by turning the lever, and under the action of the thread, the threaded sleeve 18 reduces the top pressure on the inner plate 11, thereby reducing the sliding resistance of the inner plate 11. Then, hold the sleeve plate 10 by hand and pull the inner plate 11 backward. The inner plate 11 drives the abutment plate 12 to slide backward along the output shaft 3. At this time, the protrusion 13 moves synchronously on the guide rod 14 and compresses the spring A15 to make it elastically deformed. After the abutment plate 12 moves backward, the top block 6 also loses the constraint of the abutment plate 12, so that the top block 6 loses the pressure of the abutment plate 12 in the limiting groove 5. The connecting block 7 is aligned with the connecting groove 4 of the output shaft 3 and inserted. The ribs on the connecting block 7 engage with the ribs in the connecting groove 4 to ensure that the drill bit and the output shaft 3 rotate synchronously. Release the inner plate 11. At this time, the spring A15 returns to its original position and pushes the protrusion 13 forward, causing the abutment plate 12 to contact the top block 6. Under the combined action of the arc surface of the top block 6 and the pressure, the abutment plate 12 will press the top block 6 tightly and drive it to slide inward along the limiting groove 5, forcing the top of the top block 6 to be inserted into the arc-shaped groove 8 of the connecting block 7, thereby completing the drill bit locking. When it is necessary to disassemble the drill bit, first pull the abutment plate 12 to release the top block 6, so that the top block 6 loses the pressure of the abutment plate 12 in the limiting groove 5. Then pull the connecting block 7 outward directly. At this time, the rib and the groove separate, thereby completing the disassembly.

[0036] When the electric hammer is working, the high-frequency vibration of the output shaft 3 is transmitted to the handle 2 through the machine body. The handle plate 19 is subjected to an impact force perpendicular to the handle, which drives the push rod 25 to slide inward into the guide plate 20. During this process, the mounting block 26 is displaced, and the connecting plate 24 undergoes changes in angle and position. Under the mechanical coupling between the connecting plate 24, the mounting block 26, and the moving block 22, the moving block 22 is pushed to slide along the slide rod 21, while simultaneously compressing the spring B23. During this process, the spring B23 generates a reverse elastic force after being compressed, which cancels out the inertial force of the moving block 22. When the mounting block 26 moves, it drives the moving block 22 to move through the connecting plate 24. The hinged structure of the connecting plate 24 converts linear vibration into multi-angle displacement, dispersing the vibration energy.

[0037] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A lithium-ion electric hammer rapid loading and unloading drill bit device, characterized in that: The device includes an electric hammer body (1), a handle (2) below the electric hammer body (1), an output shaft (3) connected to the output end of the electric hammer body (1), a connecting groove (4) inside the output shaft (3), a limiting groove (5) inside the output shaft (3), a top block (6) slidably installed inside the limiting groove (5), a connecting block (7) inserted into the connecting groove (4), an arc-shaped slot (8) inside the connecting block (7), a ring plate (9) installed on the output shaft (3), and a sleeve plate (1) installed on the ring plate (9). 0), an inner plate (11) is slidably installed inside the sleeve plate (10), a stop plate (12) is installed inside the inner plate (11), a protrusion (13) is installed on the stop plate (12), a guide rod (14) is installed inside the ring plate (9), the protrusion (13) is slidably installed on the guide rod (14), a spring A (15) is sleeved on the guide rod (14), a stud (16) is installed on the inner plate (11), a groove plate (17) is provided inside the sleeve plate (10), and a threaded sleeve (18) is threadedly connected to the stud (16).

2. The lithium-ion electric hammer quick-loading and unloading drill bit device according to claim 1, characterized in that: The abutment (12) is slidably mounted on the output shaft (3), and the top block (6) is provided with an arc surface.

3. The lithium-ion electric hammer quick-loading and unloading drill bit device according to claim 1, characterized in that: The connecting groove (4) is provided with a horizontal rib groove, and the connecting block (7) is equipped with a rib structure that matches the rib groove.

4. The lithium-ion electric hammer quick-loading and unloading drill bit device according to claim 1, characterized in that: One end of the spring A (15) is mounted on the protrusion (13), and the other end of the spring A (15) is mounted on the ring plate (9). The spring A (15) drives the abutment plate (12) to cover the top block (6).

5. The lithium-ion electric hammer quick-loading and unloading drill bit device according to claim 1, characterized in that: The stud (16) is disposed inside the slot plate (17), and the threaded sleeve (18) is provided with a lever.

6. The lithium-ion electric hammer quick-loading and unloading drill bit device according to claim 1, characterized in that: A guide plate (20) is installed on the grip (2), a slide rod (21) is installed on the guide plate (20), a moving block (22) is slidably installed on the slide rod (21), a spring B (23) is sleeved on the slide rod (21), a connecting plate (24) is hinged to the moving block (22) via a rotating shaft, an mounting block (26) is hinged to the connecting plate (24) via a rotating shaft, a grip plate (19) is installed on the mounting block (26), a top rod (25) is installed on the grip plate (19), and the top rod (25) is slidably disposed within the guide plate (20).

7. A lithium-ion electric hammer quick-load and unload drill bit device according to claim 6, characterized in that: One end of the spring B (23) is mounted on the moving block (22), and the other end of the spring B (23) is mounted on the guide plate (20). The spring B (23) drives the moving block (22) to tend to move closer to the middle of the slide bar (21).

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