A high-strength lithium-ion nail gun with a composite energy storage structure

Abstract

The present invention discloses a high-strength lithium-ion nail gun with a composite energy storage structure, comprising a gun body, an energy storage structure provided at the rear end of the gun body, the energy storage structure being composed of a spring compression mechanism and a vacuum cylinder mechanism; the spring compression mechanism mainly comprises a compression chamber, a spring, a spring piston and a working piston rod, the spring and the spring piston being installed in the compression chamber, the front end of the spring piston being connected to the working piston rod, and the lower part of the working piston rod being provided with an upper rack structure; the vacuum cylinder mechanism comprises a cylinder body and a cylinder piston, the cylinder piston and the rear end of the cylinder body forming a completely sealed vacuum chamber, a lower rack structure being provided on the upper side of the vacuum cylinder piston rod, the lower rack structure being meshed with the upper rack structure through a transmission gear for transmission. The energy storage structure designed by the present invention organically combines the spring compression and cylinder mechanism into one, which can not only multiply the energy storage strength, but also effectively reduce the axial and radial vibration problems at the end of nailing.

Description

Technical Field

[0001] The present invention belongs to a handheld lithium-electric nail gun, specifically a high-strength lithium-electric nail gun with a composite energy storage structure. Background Art

[0002] A lithium-ion nail gun is a handheld lithium-ion nailing tool that is mostly used in the construction, decoration, and furniture industries.

[0003] Currently, the most widely used lithium-ion nail gun uses a motor, reducer, and rotary transmission mechanism to drive a piston to compress the spring energy storage, and then releases the compressed spring to shoot nails. In the above structure, the efficiency of the transmission mechanism, the spring guide resistance, the elastic modulus of the spring, the weight of the rebound part, the rebound force of the spring, etc. will all affect the nailing force and operating comfort.

[0004] After years of use, it has been found that the structure of existing lithium-ion nail guns has the following two main problems:

[0005] 1) Using a spring alone to store energy is limited by the length and stiffness of the spring itself, resulting in insufficient energy storage strength, making it difficult to meet the needs of some high-intensity nailing operations;

[0006] 2) After nailing, the spring is affected by the impact reaction force, and its axial vibration is large, which in turn leads to an increase in rebound force, affecting the operating comfort and increasing the fatigue intensity of the operator. Summary of the Invention

[0007] In response to the above problems, the present invention designs a high-strength lithium-ion nail gun with a composite energy storage structure. Its energy storage structure organically combines spring compression and cylinder mechanism into one, which can not only multiply the energy storage strength, but also effectively reduce the axial and radial vibration problems at the end of nailing, thereby reducing labor intensity and improving the comfort of nailing operations.

[0008] In order to solve the above problems, the present invention adopts the following technical solutions:

[0009] A high-strength lithium-ion nail gun with a composite energy storage structure comprises a gun body, and an energy storage structure is provided at the tail end of the gun body. The characteristics are as follows: the energy storage structure is composed of a spring compression mechanism and a vacuum cylinder mechanism that are interconnected; wherein the spring compression mechanism mainly comprises a compression chamber, a spring, a spring piston and a working piston rod, the spring and the spring piston are installed in the compression chamber, the tail end of the spring is supported on the bottom of the compression chamber, the front end of the spring is in contact with the spring piston, and in the initial state, the spring has a pre-compression amount so that the spring piston always has a tendency to move forward; the front end of the spring piston is connected to the driving needle The working piston rod is a step-by-step working piston rod, and the lower part of the working piston rod is provided with an upper rack structure; the vacuum cylinder mechanism includes a cylinder body and a cylinder piston arranged in the cylinder body, the cylinder piston and the tail end part of the cylinder body form a completely sealed vacuum chamber, and in the initial state, the cylinder piston is located at the tail end of the cylinder body, and the front end of the cylinder piston is connected to the vacuum cylinder piston rod extending out of the cylinder body, and a lower rack structure is provided on the upper side of the vacuum cylinder piston rod, and the lower rack structure is meshed with the upper rack structure for transmission through a transmission gear fixed on the gun body; at the same time, a transmission structure is provided at the front end of the vacuum cylinder piston rod for transmission connection with the drive structure.

[0010] More specifically, the lower rack structure is meshed with the upper rack structure through a transmission gear, and the tooth shapes of the three are straight teeth, helical teeth or arc teeth.

[0011] More specifically, a spring seat for positioning the spring is provided at the tail of the spring compression chamber.

[0012] More specifically, when nailing is completed, the front side of the last tooth of the upper rack structure of the working piston rod is separated from the transmission gear.

[0013] More specifically, the transmission structure includes a driving arm arranged at the lower side of the front end of the vacuum cylinder piston rod, and the driving arm is provided with a first pushing end and a second pushing end for performing secondary transmission with the driving structure.

[0014] More specifically, the rear end of the driving arm directly forms the second pushing end, and the front end of the driving arm extends downward for a distance to form the first pushing end, and the height of the first pushing end is lower than the height of the second pushing end.

[0015] More specifically, the driving arm and the vacuum cylinder piston rod are integrally formed.

[0016] More specifically, the driving arm and the vacuum cylinder piston rod are separately provided, and the entire driving arm is fixed to the vacuum cylinder piston rod by a plurality of screws.

[0017] More specifically, the above-mentioned driving structure mainly includes a driving motor, a reducer and a crank gear; the driving motor is directly connected to the reducer, the reducer is provided with a unidirectional rotating output shaft, the output shaft is provided with transmission teeth, the crank gear is provided behind the output shaft, and the crank gear is meshed with the transmission teeth; a first pushing protrusion and a second pushing protrusion are circumferentially spaced apart on the upper edge of the top surface of the crank gear, and the height of the first pushing protrusion is lower than the second pushing protrusion, the first pushing protrusion corresponds to the position of the first pushing end, and the second pushing protrusion corresponds to the position of the second pushing end; when the crank gear rotates, the first pushing protrusion first abuts against the first pushing end and pushes the first pushing end to drive the vacuum cylinder piston rod to move forward for the first stage of energy storage. After completing the first stage of energy storage, the second pushing protrusion abuts against the second pushing end and pushes the second pushing end, so that the vacuum cylinder piston rod continues to move forward for the second stage of energy storage.

[0018] More specifically, a mounting seat is provided above the front section of the working piston rod, a connecting platform is formed on the top of the mounting seat, a connecting hole is provided on the connecting platform, and the connecting hole is movably connected to the tail of the gun needle through a screw.

[0019] The high-strength lithium-electric nail gun designed by the present invention has an energy storage structure which is a composite energy storage structure composed of a spring compression mechanism and a vacuum cylinder mechanism which are linked to each other.

[0020] During operation, the driving structure will drive the vacuum cylinder piston rod to move forward. The forward movement of the vacuum cylinder piston rod will, on the one hand, synchronously drive the cylinder piston forward, so that the vacuum chamber in the cylinder body continues to increase for vacuum energy storage operation. On the other hand, the forward movement of the vacuum cylinder piston rod is transmitted through the meshing of the transmission gear, so that the working piston rod moves backward to further compress the spring for spring compression energy storage. The above vacuum energy storage and spring compression energy storage constitute the power source for the gun needle nailing operation at the same time. Once the driving structure is separated from the vacuum cylinder piston rod, the restoring force of the compression spring serves as the first driving force, which will cause the working piston rod to pop out quickly. At the same time, the expanded vacuum chamber generates a strong backward adsorption force under the action of atmospheric pressure. The adsorption force will quickly drive the cylinder piston and the vacuum cylinder piston rod to move backward, and the backward movement of the vacuum cylinder piston rod will form a second driving force to move the working piston rod forward through the meshing transmission of the transmission gear. The above first driving force and second driving force together constitute the driving force of the gun needle. Compared with the single spring energy storage mechanism, it can obtain double nailing strength, improve the penetration and nailing speed of nailing, and meet the needs of high-intensity nailing work.

[0021] Furthermore, the presence of the vacuum cylinder mechanism provides a significant cushioning effect for the spring compression mechanism. After nailing is complete, the vacuum chamber's suction force on the cylinder piston persists, generating a secondary driving force that consistently pushes the working piston forward. This secondary driving force effectively offsets the spring's reaction force after impact, providing a significant cushioning effect. This eliminates axial and radial vibrations after nailing, improving nail gun operation comfort and reducing operator fatigue. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 , a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 , a cross-sectional view of the present invention;

[0024] Figure 3 , a cross-sectional view of the present invention during energy storage. DETAILED DESCRIPTION

[0025] like Figure 1-3 As shown, a high-strength lithium-ion nail gun with a composite energy storage structure includes a gun body 1, and an energy storage structure is provided at the tail of the gun body 1.

[0026] The energy storage structure is a composite structure, which is composed of a spring compression mechanism 2 and a vacuum cylinder mechanism 3 that are linked to each other.

[0027] The spring compression mechanism 2 mainly includes a compression chamber 21 , a spring 22 , a spring piston 23 and a working piston rod 24 .

[0028] The spring 22 and the spring piston 23 are installed in the compression chamber 21 in sequence. The tail end of the spring 22 is supported on the bottom of the compression chamber 21, and the front end of the spring 22 is connected to the spring piston 23. In the initial state, the spring 22 has a pre-compression amount so that the spring piston 23 always has a tendency to move forward.

[0029] In order to ensure the centering and effective positioning of the spring 22 during operation, a spring seat 221 for positioning the spring 22 is provided at the tail end of the spring compression chamber 21 .

[0030] The front end of the spring piston 23 is connected to a working piston rod 24 that drives the gun needle 4 to work synchronously. The front end of the working piston rod 24 extends out of the compression chamber 21, and a row of upper rack structures 241 is provided at the lower part thereof.

[0031] The vacuum cylinder mechanism 3 includes a cylinder body 31 and a cylinder piston 32 disposed in the cylinder body. The cylinder piston 32 and the tail end portion of the cylinder body 31 form a completely sealed vacuum chamber 3a. In the initial state, the cylinder piston 32 is located at the tail end of the cylinder body 31. Its structure is as follows: Figure 2 shown.

[0032] The front end of the cylinder piston 32 is connected to the vacuum cylinder piston rod 33 extending out of the cylinder body. A lower rack structure 331 is provided on the upper side of the vacuum cylinder piston rod 33. The lower rack structure 331 is engaged with the upper rack structure 241 through the transmission gear 5 fixed on the gun body 1 for transmission.

[0033] Here, the tooth shape of the upper rack structure 241, the transmission gear 5 and the lower rack structure 331 is one of straight teeth, helical teeth or arc teeth. In practice, the corresponding structure is adopted according to needs. In practice, other equivalent structures can also be selected as long as the meshing transmission of the three can be achieved.

[0034] At the same time, a detachable transmission structure is provided at the front end of the vacuum cylinder piston rod 33 and is transmission-connected to the drive structure 7 .

[0035] In this embodiment, the transmission structure includes a driving arm 6, which is provided with a first abutting end 61 and a second abutting end 62 for secondary transmission with the driving structure 7. The rear end of the driving arm 6 directly forms the second abutting end 62, and the front end of the driving arm 6 extends downward for a distance to form the first abutting end 61. The height of the first abutting end 61 is lower than that of the second abutting end 62.

[0036] The driving arm 6 and the vacuum cylinder piston rod 33 can be formed as one piece, but in practice, for the sake of ease of processing, the driving arm 6 and the vacuum cylinder piston rod 33 are generally set up separately, and the entire split driving arm 6 is fixed to the vacuum cylinder piston rod 33 by a number of screws. This embodiment diagram only illustrates the split structure.

[0037] The energy storage structure of the high-strength lithium-ion nail gun with the above structural design is a composite energy storage structure, which is composed of a spring compression mechanism 2 and a vacuum cylinder mechanism 3 that are interconnected.

[0038] During operation, the driving structure 7 drives the vacuum cylinder piston rod 33 to move forward to sequentially perform primary and secondary energy storage. Each forward movement of the vacuum cylinder piston rod 33, on the one hand, will synchronously drive the cylinder piston 32 forward, so that the vacuum chamber 3a in the cylinder body 31 is continuously enlarged to perform vacuum energy storage operation. On the other hand, the forward movement of the vacuum cylinder piston rod 33 is driven by the meshing transmission of the transmission gear 5, so that the working piston rod 24 moves backward to further compress the spring 22 for spring energy storage. Its structure is as follows: Figure 3As shown, the above vacuum energy storage and spring energy storage simultaneously constitute the power source for the nailing operation of the gun needle 4. Once the driving structure 7 is separated from the driving arm 6 on the vacuum cylinder piston rod 33, the restoring force of the compression spring 22 will constitute the first driving force F1, causing the working piston rod 24 to quickly pop out. At the same time, the vacuum chamber 3a, which has completed energy storage, generates a strong backward suction force F2 on the cylinder piston 32 under the action of atmospheric pressure. This suction force F2 will quickly drive the cylinder piston 32 and the vacuum cylinder piston rod 33 backward. The backward movement of the vacuum cylinder piston rod 33 is transmitted through the meshing of the transmission gear 5, and will generate a second driving force that moves the working piston rod 24 forward. The above first and second driving forces together constitute the driving force of the gun needle 4. Compared with a single spring energy storage mechanism, it can achieve double nailing strength within the same length, improve nailing penetration and nailing speed, and can meet the needs of high-intensity nailing work.

[0039] The presence of the vacuum cylinder mechanism 3 provides a significant cushioning effect for the spring compression mechanism 2. After nailing is completed, the vacuum chamber 3a maintains its attraction to the cylinder piston 32 due to atmospheric pressure. This secondary driving force, generated by the vacuum chamber 3a, will consistently push the working piston rod 24 forward. This secondary driving force effectively offsets the rearward reaction force of the spring 22 after it has impacted its position, thereby eliminating axial and radial vibrations of the spring 22 after nailing. This improves the operating comfort of the nail gun and reduces operator fatigue.

[0040] Furthermore, at the moment nailing is completed, the working piston rod 24 still experiences significant forward inertia. This inertial force generates a strong impact force between the upper rack structure 241 and the transmission teeth of the transmission gear 5. This impact force can easily cause the teeth of both to seize and even cause tooth damage, seriously affecting the service life of the working piston rod 24 and the transmission gear 5. To address this issue, the present invention separates the front side of the last tooth 241a of the upper rack structure 241 of the working piston rod 24 from the transmission gear 5 when nailing is completed. At this time, the inertial force of the working piston rod 24 is not transmitted to the transmission gear 5, thereby fundamentally eliminating the stress impact between the two and preventing the occurrence of seizure and tooth damage. However, at the same time, the rear side of the last tooth 241a of the upper rack structure 241 is still in contact with the transmission gear 5. Therefore, the axial movement of the working piston rod 24 is still limited by the transmission gear 5 and the vacuum cylinder structure 3, providing excellent vibration buffering and elimination effects.

[0041] In this embodiment, the drive structure 7 mainly includes a drive motor 71, a reducer 72, and a crank gear 75. The drive motor 71 is directly connected to the reducer 72. The reducer 72 is provided with a unidirectionally rotatable output shaft 73, on which transmission teeth 74 are provided. The crank gear 75 is provided behind the output shaft 73 and meshes with the transmission teeth 74. A first pushing protrusion 751 and a second pushing protrusion 752 are circumferentially spaced apart on the top surface of the crank gear 75. The first pushing protrusion 751 is lower than the second pushing protrusion 752. The first pushing protrusion 751 corresponds to the position of the first abutting end 61, and the second pushing protrusion 752 corresponds to the position of the second abutting end 62.

[0042] During operation, when the drive motor 71 drives the crank gear 73 to rotate, the first pushing protrusion 751 first contacts the first push end 61 and pushes the drive arm 6 to drive the vacuum cylinder piston rod 33 forward to perform the first stage of energy storage. After completing the first stage of energy storage, the first pushing protrusion 751 separates from the first push end 61, while the second pushing protrusion 752 contacts the second push end 62 and further pushes the drive arm 6, causing the vacuum cylinder piston rod 33 to continue moving forward to perform the second stage of energy storage. This process continues until the second stage of energy storage is completed, at which time the second pushing protrusion 752 separates from the second push end 62, and the first pushing protrusion 751 is also in a separated state from the first push end 61, that is, the constraint of the drive structure 7 on the vacuum cylinder piston rod 33 is completely released, and the nailing working state is entered.

[0043] In addition, considering that the gun needle 4 in the nail gun is in a reciprocating high-frequency working state, it is a wearing part and needs to be replaced frequently during use. For this reason, a mounting seat 242 is provided above the front section of the working piston rod 24 in the present invention, and a connecting platform is formed on the top of the mounting seat 242. A connecting hole 2421 is provided on the connecting platform. The connecting hole 2421 is movably connected to the tail of the gun needle 4 through a screw 2422. During use, it is only necessary to remove the screw 2422 to realize the replacement operation of the gun needle 4, which is convenient and quick.

[0044] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent change or modification made to the above embodiment based on the technical principle of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A high-strength lithium-ion nail gun with a composite energy storage structure, comprising a gun body (1), wherein an energy storage structure is provided at the tail of the gun body (1), and characterized in that: The energy storage structure is composed of a spring compression mechanism (2) and a vacuum cylinder mechanism (3) that are interconnected; wherein the spring compression mechanism (2) includes a compression chamber (21), a spring (22), a spring piston (23) and a working piston rod (24); the spring (22) and the spring piston (23) are installed in the compression chamber (21); the tail end of the spring (22) is supported on the bottom of the compression chamber (21); the front end of the spring (22) is connected to the spring piston (23); in the initial state, the spring (22) has a pre-compression amount so that the spring piston (23) always has a tendency to move forward; the front end of the spring piston (23) is connected to the working piston rod (24) that drives the gun needle (4) to work synchronously; the lower part of the working piston rod (24) is provided with an upper rack Structure (241); the vacuum cylinder mechanism (3) includes a cylinder body (31) and a cylinder piston (32) arranged in the cylinder body, the cylinder piston (32) and the tail end portion of the cylinder body (31) form a completely sealed vacuum chamber (3a), in the initial state, the cylinder piston (32) is located at the tail end of the cylinder body (31), the front end of the cylinder piston (32) is connected to the vacuum cylinder piston rod (33) extending out of the cylinder body (31), the upper side of the vacuum cylinder piston rod (33) is provided with a lower rack structure (331), the lower rack structure (331) is meshed with the upper rack structure (241) through a transmission gear (5) fixed on the gun body (1); at the same time, the front end of the vacuum cylinder piston rod (33) is provided with a transmission structure and is transmission-connected with the drive structure (7).

2. A high-strength lithium-ion nail gun with a composite energy storage structure as claimed in claim 1, characterized in that: The lower rack structure (331) is meshed with the upper rack structure (241) through the transmission gear (5), and the tooth shapes of the three are straight teeth, helical teeth, or arc teeth.

3. The high-strength lithium-ion nail gun with a composite energy storage structure according to claim 1, characterized in that: A spring seat (221) for positioning the spring (22) is provided at the tail of the compression chamber (21).

4. The high-strength lithium-ion nail gun with a composite energy storage structure according to claim 1, characterized in that: When nailing is completed, the front side of the last tooth (241a) of the upper rack structure (241) of the working piston rod (24) is separated from the transmission gear (5).

5. A high-strength lithium-ion nail gun with a composite energy storage structure according to any one of claims 1 to 4, characterized in that: The transmission structure includes a driving arm (6) arranged at the lower side of the front end of the vacuum cylinder piston rod, and the driving arm (6) is provided with a first push end (61) and a second push end (62) for performing secondary transmission with the driving structure (7).

6. A high-strength lithium-ion nail gun with a composite energy storage structure as claimed in claim 5, characterized in that: The rear end of the driving arm (6) directly forms the second pushing end (62), and the front end of the driving arm (6) extends downward for a distance to form the first pushing end (61), and the height of the first pushing end (61) is lower than the height of the second pushing end (62).

7. A high-strength lithium-ion nail gun with a composite energy storage structure as claimed in claim 6, characterized in that: The driving arm (6) and the vacuum cylinder piston rod (33) are integrally formed.

8. The high-strength lithium-ion nail gun with a composite energy storage structure according to claim 6, characterized in that: The driving arm (6) and the vacuum cylinder piston rod (33) are separately provided, and the entire driving arm (6) is fixed to the vacuum cylinder piston rod (33) by a plurality of screws.

9. The high-strength lithium-ion nail gun with a composite energy storage structure according to claim 6, characterized in that: The driving structure (7) includes a driving motor (71), a reducer (72) and a crank gear (75); the driving motor (71) is directly connected to the reducer (72); the reducer (72) is provided with a unidirectionally rotating output shaft (73); the output shaft (73) is provided with a transmission tooth (74); the crank gear (75) is provided behind the output shaft (73); the crank gear (75) is meshed with the transmission tooth (74); a first pushing protrusion (751) and a second pushing protrusion (752) are provided on the top surface of the crank gear (75) at intervals in the circumferential direction, and the height of the first pushing protrusion (751) is lower than that of the second pushing protrusion. The crank gear (752) is actuated by a first push protrusion (751) corresponding to the position of the first push end (61), and the second push protrusion (752) corresponding to the position of the second push end (62); when the crank gear (75) rotates, the first push protrusion (751) first contacts the first push end (61) and pushes the first push end (61) to drive the vacuum cylinder piston rod (33) to move forward to perform the first stage of energy storage. After the first stage of energy storage is completed, the second push protrusion (752) contacts the second push end (62) and pushes the second push end (62) to make the vacuum cylinder piston rod (33) continue to move forward to perform the second stage of energy storage.

10. A high-strength lithium-ion nail gun with a composite energy storage structure according to any one of claims 1 to 4, characterized in that: A mounting seat (242) is provided above the front section of the working piston rod (24), a connecting platform is formed on the top of the mounting seat (242), a connecting hole (2421) is provided on the connecting platform, and the connecting hole (2421) is movably connected to the tail of the gun needle (4) through a screw (2422).

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