Hybrid power mechanism for a nail gun and nail gun

Abstract

The application belongs to the technical field of fastening devices, and relates to a mixed power mechanism for a nail gun and the nail gun. The mixed power mechanism for the nail gun comprises a hitting assembly and an energy storage assembly. The energy storage assembly has a cylinder body arranged in the nail gun and having a cavity inside, a movable seat movably arranged in the cylinder body and separating the cavity into a spring cavity and a gas cavity, and a spring unit movably installed in the spring cavity and having at least one energy storage spring. The hitting assembly has a piston and a striker. When the piston is pushed by external force towards the movable seat, the gas in the gas cavity and the energy storage spring are compressed and power is generated. In the working process of the nail gun, the spring unit in the spring cavity and the gas in the gas cavity can be compressed, so that the pressure of the compressed gas and the elastic force of the compressed spring are generated, and the two forces can be superimposed to provide power for the nail shooting.

Description

Technical Field

[0001] This invention belongs to the field of fastening device technology, and relates to a hybrid power mechanism for a nail gun and a nail gun. Background Technology

[0002] A nail gun is a fastening tool, widely used in construction. Based on the power source, nail guns are generally classified into lithium-ion nail guns and pneumatic nail guns. Lithium-ion nail guns use a lithium battery to provide power, controlling a drive motor and corresponding transmission structure to push a piston. The piston compresses a force spring to store energy. When firing a nail, the force spring drives the piston, which in turn moves a firing pin mounted on the piston to strike and eject the nail. For example, the principle of a spring-driven lithium-ion nail gun disclosed in Chinese Utility Model Patent No. 201921395877.X is as follows: the drive motor moves the nail-driving component away from the nail-driving direction via a drive wheel, thereby compressing the drive spring. Then, the drive wheel disengages from the nail-driving component, and the nail-driving component is ejected at high speed under the action of the drive spring, thus firing the nail. This spring-loaded lithium-ion nail gun is small and portable, but it is mainly suitable for low-power nail shooting scenarios and cannot meet the needs of high-power nail shooting. In addition, after nailing, the drive spring will continuously bounce back and forth in the cylinder, causing a continuous vibration phenomenon on the nail gun. If the spring force is greater, the reaction force of the drive spring on the nail gun will be greater, the vibration phenomenon will be more obvious and longer, and the user will need to exert more grip force to control the nail gun, which can easily lead to fatigue.

[0003] Pneumatic nail guns, as described in the prior patent CN214560685U, have a cylinder inside the gun housing. Inside the cylinder is a piston, which divides the cylinder's interior into an inlet chamber and an outlet chamber. The inlet chamber requires a separate air compressor for air supply. The compressor fills the inlet chamber with high-pressure gas, pushing the piston and causing a firing pin mounted on the piston to strike and eject the nail. However, this type of nail gun, which uses a spring to store energy and drive the nail, is not suitable for objects with high hardness due to the limitations of spring force. Furthermore, the need for a separate air compressor makes it inconvenient to carry. To address these shortcomings, lithium-ion battery-powered nail guns have emerged. These guns have a pre-existing air chamber inside the gun, which is filled with a certain amount of gas. A lithium battery drives a motor to compress the gas in the chamber, creating the pressure needed to eject the nail. Although this type of lithium-ion electric nail gun is more convenient to use than the pneumatic nail gun mentioned above, as it does not require a separate air compressor, it still has some problems. For example, since the air compression ratio inside the cylinder is constant, a larger cylinder cavity is needed to store more gas in order to achieve higher power. This results in a larger size and heavier weight for the gas spring lithium-ion nail gun. At the same time, since the gas inside the cylinder needs to be repeatedly compressed, airtightness is crucial. The higher the power of the nail gun, the more difficult the manufacturing process becomes, which can easily lead to a higher scrap rate.

[0004] Therefore, there is an urgent need to design a nail gun that is compact, powerful, simple in structure, and easy to manufacture. Summary of the Invention

[0005] To solve the above problems, a hybrid power mechanism for nail guns and a nail gun are provided.

[0006] The present invention adopts the following technical solution:

[0007] A hybrid power mechanism for a nail gun, installed inside the nail gun, is used to provide power for striking the nail. It features the following technical characteristics: a striking assembly for striking the nail; and an energy storage assembly for cooperating with the striking assembly and driving it in linear motion. The energy storage assembly includes: a cylinder housed inside the nail gun, having a cavity inside; a movable seat movably disposed within the cylinder, dividing the cavity into a spring cavity and an air cavity; and a spring unit movably disposed within the spring cavity, having at least one energy storage spring. The striking assembly includes: a piston movably disposed at the front end of the cylinder; and a firing pin mounted on the piston, its front end extending out of the cylinder for striking the nail. When the piston is pushed by an external force towards the movable seat, the gas in the air cavity and the energy storage spring are compressed, generating power.

[0008] The hybrid power mechanism for nail guns provided by the present invention may also have the following technical features: the spring chamber is located on the front side of the air chamber, the piston is located inside the spring chamber, and the energy storage spring is installed between the piston and the movable seat.

[0009] The hybrid power mechanism for nail guns provided by this invention may also have the following technical feature: a gap is provided between the outer periphery of the piston and the inner wall of the spring cavity to connect the spring cavity with the outside.

[0010] The hybrid power mechanism for nail guns provided by this invention may also have the following technical feature: a piston sealing ring is provided between the outer periphery of the piston and the inner wall of the spring cavity to isolate the spring cavity from the outside.

[0011] The hybrid power mechanism for nail guns provided by this invention also has the following technical features: an air supply channel is provided on the rear end cover of the cylinder, and an air valve is provided in the air supply channel for supplying air to the air chamber. The air valve has: a one-way sealing ring installed at the air inlet end of the air supply channel; a one-way valve core for sealing the air inlet end of the air supply channel; a spring seat installed at the air outlet end of the air supply channel; and a one-way spring disposed between the one-way valve core and the spring seat, and the one-way valve core abuts against the one-way sealing ring to seal the air inlet end.

[0012] The hybrid power mechanism for nail guns provided by the present invention may also have the following technical features: the spring chamber is located on the rear side of the air chamber, the piston is located inside the air chamber, and the energy storage spring is installed between the rear end cover of the chamber and the movable seat.

[0013] The hybrid power mechanism for nail guns provided by this invention may also have the following technical feature: a through hole is provided on the rear end cover to connect the spring cavity with the outside.

[0014] The hybrid power mechanism for nail guns provided by the present invention may also have the following technical features, wherein the spring unit includes at least one inner spring and an outer spring that sleeves the at least one inner spring inside, and a buffer pad for cushioning the piston is installed on the front side of the cylinder.

[0015] The hybrid power mechanism for nail guns provided by the present invention may also have the following technical features: the spring unit includes an inner spring and an outer spring arranged coaxially, the outer spring having a helical direction opposite to that of the inner spring; or, the spring unit includes two or more inner springs of different diameters and an outer spring, the inner springs being arranged coaxially with the outer springs within the outer springs, and the helical directions of adjacent inner springs being opposite.

[0016] The present invention also proposes a nail gun having the following technical features: a power mechanism for providing power for the nail inside the nail gun to be driven out; and a drive mechanism for driving the power mechanism to generate power, wherein the power mechanism is a hybrid power mechanism for a nail gun as described above.

[0017] Invention Function and Effect

[0018] The hybrid power mechanism and nail gun for a nail gun according to the present invention include a striking assembly and an energy storage assembly. The energy storage assembly's cylinder contains a movable seat that divides the internal cavity into a spring chamber and an air chamber. A spring unit is installed in the spring chamber, and gas is contained in the air chamber. During the nail gun's operation, the spring unit in the spring chamber and the gas in the air chamber are compressed, generating pressure from the compressed gas and spring force from the compressed spring. These two forces are superimposed to provide power for nail firing. Compared to single-type spring nail guns or single-type gas spring nail guns under the same conditions, this increases power without increasing the manufacturing difficulty of the cylinder. Furthermore, separating the air chamber and spring chamber allows for their combined action while minimizing mutual interference. Additionally, wear in certain areas during prolonged use allows for convenient partial repair and replacement. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the nail gun in Embodiment 1 of the present invention.

[0020] Figure 2 This is one of the cross-sectional views of the hybrid power mechanism in Embodiment 1 of the present invention.

[0021] Figure 3 This is a second cross-sectional view of the hybrid power mechanism in Embodiment 1 of the present invention.

[0022] Figure 4 This is a schematic diagram of the installation structure of the piston and the firing pin in Embodiment 1 of the present invention.

[0023] Figure 5 This is a schematic diagram of the piston mounting structure in Embodiment 2 of the present invention.

[0024] Figure 6 This is a schematic diagram of the air valve installation structure in Embodiment 3 of the present invention.

[0025] Figure 7 This is a cross-sectional view of the hybrid power mechanism in Embodiment 4 of the present invention.

[0026] Figure 8 This is a cross-sectional view of the hybrid power mechanism in Embodiment 5 of the present invention.

[0027] Figure 9This is a schematic diagram of the spring unit in Embodiment 6 of the present invention.

[0028] Figure 10 This is a schematic diagram of the spring unit in Embodiment 7 of the present invention.

[0029] Reference numerals: Hybrid power mechanism 10, striking assembly 11, energy storage assembly 12, cylinder 13, spring chamber 131, gap 1311, air chamber 132, front cover 133, rear cover 134, rear sealing ring 1341, movable seat 14, guide ring 141, sealing ring 142, spring mounting protrusion 143, energy storage spring 15, inner spring 151, outer spring 152, piston 16, front mounting part 161, rear mounting part 162, piston sealing ring 163, spring mounting groove 164, radial pin 165, firing pin 17, nail end 171, mounting end 172, buffer pad 18, through hole 181, air valve 19, one-way valve core 191, one-way spring 192, spring seat 193, one-way sealing ring 194, drive mechanism 20, nozzle mechanism 30, nail feeding mechanism 40. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of the present invention easy to understand, the following describes the driving device for nail guns of the present invention in detail with reference to embodiments and accompanying drawings.

[0031] <Example 1>

[0032] This embodiment provides a nail gun with a hybrid power mechanism for nail guns, which is easier to operate and can improve safety and nailing effect.

[0033] Figure 1 This is a schematic diagram of the nail gun in Embodiment 1 of the present invention.

[0034] like Figure 1 As shown, the nail gun includes a hybrid power mechanism 10, a drive mechanism 20, a nozzle mechanism 30, a nail feeding mechanism 40, a lithium battery module, and a housing (not shown in the figure).

[0035] The nozzle mechanism 30 has a firing channel and an outlet for firing nails; the nail feeding mechanism 40 has a nail passage in which a nail is installed, and the firing channel is connected to the nail passage; a hybrid power mechanism 10 for driving the nail is provided at the rear end of the nozzle mechanism 30, and a drive mechanism 20 for driving its energy storage is connected to one side of the hybrid power mechanism 10. The hybrid power mechanism 10 can provide the power for the nail in the nail gun to be fired. The hybrid power mechanism 10 and the drive mechanism 20 are enclosed in a shell, and a handle extends from the rear of the shell. A lithium battery module for replenishing energy to the drive mechanism 20 is installed at the lower end of the handle, and a nail firing switch for controlling the drive mechanism 20 is provided at the upper end of the handle.

[0036] Figure 2 This is one of the cross-sectional views of the hybrid power mechanism in Embodiment 1 of the present invention.

[0037] Figure 3 This is a second cross-sectional view of the hybrid power mechanism in Embodiment 1 of the present invention.

[0038] like Figure 2 and Figure 3 As shown, the hybrid power mechanism 10 includes a striking component 11 and an energy storage component 12. The striking component 11 is used to strike the nail, and the energy storage component 12 cooperates with the striking component to drive the striking component to perform linear motion. The energy storage component 12 has a cylinder 13, a movable seat 14, and a spring unit. The cylinder 13 is made of metal and is housed within the casing of the nail gun. The cylinder 13 has a front side, a rear side, and a cylinder body connecting the two. The front side and rear side can be integrally formed at the front and rear ends of the cylinder body, or they can be separately disposed at the front and rear ends of the cylinder body. In this embodiment, as shown... Figure 2 As shown, the front part is a front end cover 133, which is integrally formed by welding at the front end of the cylinder body. A nozzle mechanism 30 is installed on the front end. The rear part is a rear end cover 134, which is installed at the rear end of the cylinder body by a rear sealing ring 1341 and the two are fixed together by four fastening screws. The interior of the cylinder body has a cavity for installing the movable seat 14 and the spring unit. The front end cover 133 and the rear end cover 134 are respectively provided at the front and rear ends of the cavity. The movable seat 14 is movably disposed in the cylinder body 13 and divides the cavity into a spring cavity 131 and an air cavity 132. The spring unit is movably installed in the spring cavity 131 and has at least one energy storage spring 15.

[0039] The striking assembly 11 includes a piston 16, a firing pin 17, and a buffer pad 18. The piston 16 is movably disposed at the front end of the cylinder 13, i.e., at the front end of the cavity. The rear end of the firing pin 17 is fixedly mounted on the piston 16, and its front end extends out of the cylinder 13 to strike the nail. The buffer pad 18 is located at the front end of the cylinder 13 and fits against the front end cover 133. Specifically, the piston 16 includes a front mounting portion 161 for mounting the firing pin 17 and a rear mounting portion 162 for mounting the energy storage spring 15. The firing pin 17 has a nail-firing end 171 extending out of the buffer pad 18 and the front end cover 133 for firing the nail, and a mounting end 172 mounted on the piston 16. Figure 2As shown, a through hole 181 is provided in the middle of the buffer pad 18, and correspondingly, an opening is provided in the middle of the front cover 133 to allow the nail end 171 of the firing pin 17 to extend out. The width of the front mounting part 161 is smaller than the width of the rear mounting part 162, and the front mounting part 161 can extend into the through hole of the buffer pad 18. The area of ​​the rear mounting part 162 protruding from the front mounting part 161 can contact the buffer pad 18, thereby effectively buffering the piston 16 and limiting the piston 16 to prevent the piston 16 from dislodging from the spring cavity 131. When the firing pin 17 and the piston 16 are pushed towards the movable seat 14 by the external force brought by the drive mechanism 20, the gas in the gas cavity 132 and the energy storage spring 15 in the spring cavity are compressed, thereby accumulating energy to generate power.

[0040] In this embodiment, as Figure 2 As shown, the spring chamber 131 is located in front of the air chamber 132, the piston 16 is located inside the spring chamber 131, and the energy storage spring 15 is installed between the piston 16 and the movable seat 14. When the piston 16 moves toward the movable seat 14, it compresses the energy storage spring 15, thereby accumulating pressure. A sealed air chamber 132 is formed between the rear end cover 134 and the movable seat 14. When the movable seat 14 moves toward the rear end cover 134, it compresses the gas in the air chamber 132, causing the air pressure in the air chamber 132 to increase, thereby increasing the energy.

[0041] In this embodiment, a gap 1311 is provided between the outer periphery of the piston 16 and the inner wall of the spring cavity 131. When the piston 16 is pushed, after the piston 16 leaves the buffer pad 18, the gap 1311 will connect with the through hole 181 of the buffer pad 18 and the opening of the front cover 133, thereby connecting with the outside. When the nail is fired, the piston 16 moves quickly, and the air in the front spring cavity 131 can be quickly discharged, thereby not increasing the nail firing resistance to the piston 16 and the firing pin 17.

[0042] A guide ring 141 for reducing sliding resistance and a sealing ring 142 for increasing sealing effect are sequentially embedded on the side wall of the movable seat 14. The outer surfaces of the guide ring 141 and the sealing ring 142 are in contact with the inner wall of the cylinder body 13. The sealing ring 142 allows the spring cavity 131 and the air cavity 132 to be separated into two separate spaces, which effectively prevents the gas in the air cavity 132 from escaping and affecting the nail-shooting effect.

[0043] Figure 4 This is a schematic diagram of the installation structure of the piston and the firing pin in Embodiment 1 of the present invention.

[0044] like Figure 4As shown, the front mounting portion 161 of the piston 16 is a protruding column shape and has a slot that matches the shape of the mounting end 172 of the firing pin 17. After the mounting end 172 is inserted into the slot of the front mounting portion 161 along its moving direction, the two are fixedly connected by a radial pin 165. In this embodiment, the radial pin 165 is detachable, and when the firing pin 17 needs to be replaced, it can be quickly replaced by removing the radial pin 165.

[0045] The spring unit is freely and movably installed in the spring cavity 131 between the piston 16 and the movable seat 14. The spring unit has at least one energy storage spring 15. When the piston 16 is pushed backward by an external force, the spring unit on the rear side is compressed first. When the spring unit is compressed to a certain value, the movable seat 14 will also be pushed, so that the gas in the gas cavity 132 is also compressed, forming a certain pressure to complete the energy accumulation process.

[0046] This embodiment, by compressing the piston 16, can simultaneously generate the power of compressed gas and the power of compressed spring. Compared to single-type spring nail guns or single-type gas spring nail guns under the same conditions, it can increase the power by at least several times, without increasing the manufacturing difficulty of the cylinder. Furthermore, since the rear air chamber 132 is closed, after nailing, the spring unit will continuously bounce within the cylinder 13 during the reset process. This continuous bouncing impacts the cylinder 13 or piston 16, generating continuous vibration, i.e., causing a chattering phenomenon. Because the bouncing compresses the internal sealed gas medium, generating bouncing resistance, it can more quickly reduce the chattering phenomenon caused by the spring unit, improving the comfort of nailing. Compared to single-type spring nail guns under the same conditions, it can effectively save the user's effort.

[0047] The spring unit includes at least one inner spring 151 and an outer spring 152 that houses the at least one inner spring 151. Both the inner spring 151 and the outer spring 152 are types of energy storage springs.

[0048] In this embodiment, as Figure 2 , 3As shown, the spring unit includes an inner spring 151 and an outer spring 152 coaxially arranged, with the outer spring 152 having a helical direction opposite to that of the inner spring 151. To facilitate the installation of the energy storage spring and prevent mutual interference, at least one spring mounting groove 164 for installing the energy storage spring is provided on the rear mounting portion 162 of the piston 16, and at least one spring mounting protrusion 143 for installing the energy storage spring extends from the front side of the movable seat 14. The spring mounting protrusion 143 can be provided as one, with the ends of the inner spring 151 and the outer spring 152 coaxially sleeved on the outer periphery of the spring mounting protrusion 143; or two, both of which are annular, with different sizes and coaxially arranged, their outer wall diameters being slightly smaller than the inner diameters of the corresponding inner spring 151 and outer spring 152, respectively, and the ends of the inner spring 151 and outer spring 152 being installed corresponding to the inner and outer spring mounting protrusions 143. A spring mounting slot 164 is provided, the outer circle of which is slightly larger than the outer diameter of the outer spring 152, and the inner circle of which is slightly smaller than the inner diameter of the inner spring 151. This facilitates both the positioning and guidance of the energy storage spring and its separation.

[0049] The spring unit in this embodiment also has the following advantages:

[0050] 1. Without increasing the size of the cylinder 13, increase the overall elastic coefficient of the spring unit to obtain the largest possible elastic force, so as to generate greater nail-shooting power.

[0051] 2. The ratio of the maximum load force of the outer spring 152 to the maximum load force of the inner spring 151 is 5:2.

[0052] 3. To ensure the concentricity of the combined springs, the inner spring 151 and the outer spring 152 have opposite helical directions. This prevents the inner and outer springs from becoming misaligned or interfering with each other during compression or extension.

[0053] 4. Due to the different directions of spring rotation and loads, the resulting jumping frequencies are not the same, and the forces exerted on the nail gun can partially cancel each other out, thereby greatly reducing the vibration phenomenon after the work is done and improving the comfort after nailing.

[0054] like Figures 1-3 As shown, a drive platform 1331 is integrally formed on one side of the front cover 133. A drive mechanism 20 is provided on the drive platform 1331. The drive mechanism 20 includes a drive tooth 173 provided on one side of the striker 17, a notched gear 21 mounted on the drive platform 1331, a reducer 22, and a drive motor 23.

[0055] The output end of the drive motor 23 is connected to the input end of the reducer 22. The output end of the reducer 22 is equipped with a notched gear 21. The notched gear 21 has a toothed portion 211 that meshes with the drive tooth 173 and a notched portion 212 that does not mesh with the drive tooth 173.

[0056] For ease of installation, the working surfaces of the drive platform 1331 and the front cover 133 are perpendicular to each other. The drive motor 23 is mounted on the lower end face of the drive platform 1331 via a reducer 22, and the notched gear 21 is mounted on the upper end face of the drive platform 1331. A cam and a limit switch are also provided above the notched gear 21, and the cam rotates synchronously with the notched gear 21. When the cam's convex part touches the limit switch, the limit switch controls the drive motor 23 to stop rotating. A lithium battery module supplies power to the drive motor 23, and a nail gun switch is used to control the operation of the drive motor 23.

[0057] The drive teeth 173 are located on the side of the firing pin 17 near the notched gear 21 and mesh with the teeth 211 of the notched gear 21. The length of all drive teeth 173 is adapted to the compression length of the spring unit, and the number of teeth in the teeth 211 is adapted to the number of teeth in all drive teeth 173. In this embodiment, the teeth 211 occupy approximately 3 / 4 of the circumference of the notched gear, and the notch 212 occupies approximately 1 / 4 of the circumference of the notched gear. At this point, when the notched gear 21 rotates 270°, the movement of the firing pin 17 must satisfy the compression of the spring unit to the nail firing position.

[0058] When the tooth 211 engages with the drive tooth 173, the rotation of the notched gear 21 can drive the firing pin 17 to move; when the notched part 212 faces the firing pin 17, that is, when the tooth 211 does not engage with the drive tooth 173, the firing pin 17 is in a state without the constraint of the notched gear 21, and nail shooting can be realized.

[0059] <Example 2>

[0060] Figure 5 This is a schematic diagram of the piston mounting structure in Embodiment 2 of the present invention.

[0061] This embodiment provides a nail gun, which is basically the same as Embodiment 1 above, except that: Figure 5 As shown, the spring cavity 131 is also designed as a sealed space, that is, a piston sealing ring 163 is set between the outer periphery of the rear mounting part 162 of the piston 16 and the inner wall of the spring cavity 131, so that the gas in the spring cavity 131 can be compressed and stored during the piston movement, further improving the power storage effect on the original basis.

[0062] To better utilize the power within the spring chamber 131, the critical compression position of the spring unit can be made to coincide with the critical compression position of the gas within the spring chamber 131 after the piston 16 is compressed. In this way, each movement of the piston 16 can obtain the maximum power, achieving the highest cost-effectiveness.

[0063] <Example 3>

[0064] Figure 6 This is a schematic diagram of the air valve installation structure in Embodiment 3 of the present invention.

[0065] This embodiment provides a nail gun, which, based on the above embodiments 1 and 2, adds an air valve 19 to the air chamber 132 for replenishing air into the air chamber 132. For example... Figure 6 As shown, the rear end cover 134 of the cylinder body 13 has an air supply channel 1342. The air supply channel 1342 has an air inlet end that connects to the outside and an air outlet end that connects to the air chamber 132. An air valve 19 is provided in the air supply channel 1342. The air valve 19 has a one-way valve core 191, a one-way spring 192, a spring seat 193, and a one-way sealing ring 194. The one-way valve core 191 is movably disposed in the air supply channel 1342 through the one-way spring 192. One-way sealing ring 194 is provided at one end of the one-way valve core 191 and the air inlet end of the air supply channel 1342. The other end is inserted into the one-way spring 192. The one-way spring 192 is installed at the air outlet end of the air supply channel 1342 through the spring seat 193. The one-way spring 192 presses the one-way valve core 191 against the one-way sealing ring 194 to seal the air inlet end.

[0066] In this embodiment, the air chamber 132 does not need to be filled with air during production. Only when sealing the rear end cover 134 at the end is the piston 16 placed in the release position, and then the rear end cover 134 is installed. This ensures that the air chamber 132 stores air at the same atmospheric pressure. The aforementioned release position is when the piston 16 is at the very front of the cylinder 13, close to the buffer pad 18, which is also the position where the air chamber 132 has the largest volume.

[0067] Due to wear and tear on the seals over long-term use, gas leakage may occur within the air chamber 132. When the piston 16 fires the nail and is in the release position, negative pressure will form within the air chamber 132, affecting the power of the firing pin 17 and the power of the next compressed air cycle. Furthermore, the greater the gas leakage, the greater the negative pressure effect and the greater the impact on the nail firing power. Therefore, this embodiment includes the aforementioned air valve 19. When the piston 16 moves backward and compresses air, the air valve 19 is closed. When the firing pin 17 fires the nail, the resulting vibration is sufficient to cause the one-way valve core 191 to vibrate, instantly opening the air valve 19 to replenish air, ensuring the internal air pressure matches atmospheric pressure, achieving automatic air replenishment, and reducing the impact of air leakage on the power mechanism.

[0068] Additionally, if increased power is required, the user can pressurize the air chamber 132 directly through the air valve 19 and external pressurization device when the piston 16 is in the released position. A preset gas pressure of 0-0.8 MPa is generally possible, resulting in greater power when the piston 16 is compressed. Furthermore, a higher pre-pressure within the air chamber 132 increases the resistance generated by the spring unit during continuous bouncing after nail firing, further reducing the vibration of the nail gun.

[0069] <Example 4>

[0070] Figure 7 This is a cross-sectional view of the hybrid power mechanism in Embodiment 4 of the present invention.

[0071] This embodiment is basically the same as Embodiment 2 above, except that: Figure 7 As shown, the spring chamber 131 is located behind the air chamber 132 (that is, the positions of the two chambers in Embodiment 1 are interchanged), the piston 16 is located inside the air chamber 132, and the spring unit is installed between the rear end cover 134 and the movable seat 14 of the cylinder body 13. In order to ensure the sealing of the air chamber 132, retaining rings and sealing rings are provided between the outer periphery of the piston 16 and the movable seat 14 and the inner wall of the cylinder body 13.

[0072] <Example 5>

[0073] Figure 8 This is a cross-sectional view of the hybrid power mechanism in Embodiment 5 of the present invention.

[0074] Based on embodiment 4 above, this embodiment has a through hole 1343 on the rear end cover 134 of the cylinder 13 to connect the spring cavity 131 with the outside. When the nail is fired, the piston 16 moves quickly and the air in the spring cavity 131 can be quickly discharged, so as not to increase the nail firing resistance to the piston 16 and the firing pin 17.

[0075] <Example 6>

[0076] Figure 9 This is a schematic diagram of the spring unit in Embodiment 6 of the present invention.

[0077] Based on the above embodiments 1-5, the spring unit has the following assembly form: the spring unit includes two or more inner springs 151 with different diameters, the inner springs 151 and the outer springs 152 are coaxially assembled, and the helical directions of two adjacent inner springs 151 are opposite.

[0078] like Figure 9As shown, the spring unit contains two inner springs 151 of different diameters and one outer spring 152. The three springs are sequentially fitted between the piston 16 and the movable seat 14 (Examples 1-3) or between the movable seat 14 and the rear end cover 134 (Examples 4-5) according to their diameters. The inner spring 151 with the smallest diameter has the same helical direction as the outer spring 152, while the inner spring 151 in the middle has the opposite helical direction to the other two.

[0079] The spring unit in this embodiment has the following advantages:

[0080] 1. Without increasing the size of the cylinder, the overall elastic coefficient of the spring unit can be further increased to provide greater nail-shooting power.

[0081] 2. By setting different spiral directions, the concentric relationship of the combined springs can be ensured, preventing the inner and outer springs from becoming misaligned or interfering with each other.

[0082] 3. Due to the differences in the direction of rotation, mass, and stiffness of the springs, the vibration frequencies of the springs after compression and release are inconsistent. This prevents the springs from resonating, and the reaction forces of the springs will partially cancel each other out, greatly reducing the vibration after the work is done, improving the vibration reduction and nailing effect, and making nailing more effortless and comfortable.

[0083] 4. When a certain spring force is obtained, this spring unit has the advantages of small size and easy installation.

[0084] <Example 7>

[0085] Figure 10 This is a schematic diagram of the spring unit in Embodiment 7 of the present invention.

[0086] Based on the above embodiments 1-5, the spring unit has the following assembly form: the spring unit contains a plurality of inner springs 151 of the same diameter, which are evenly arranged inside the outer spring 152.

[0087] like Figure 10 As shown, the spring unit contains three inner springs 151 of the same diameter and one outer spring 152. The inner springs 151 are arranged in parallel and are evenly distributed circumferentially around the extended center line of the firing pin 17. The helical directions of two inner springs 151 are opposite to those of the outer spring 152, while the helical direction of the third inner spring 151 is the same as that of the outer spring 152. This embodiment makes full use of the internal space of the outer spring 152, maximizing the overall elastic coefficient of the spring unit.

[0088] The technology and effects of the above embodiments:

[0089] The nail gun and hybrid power mechanism for nail guns proposed in the above embodiments include a striking component 11 and an energy storage component 12. The movable seat 14 inside the cylinder 13 of the energy storage component 12 divides the internal cavity of the cylinder 13 into a spring cavity 131 and an air cavity 132. A spring unit is installed in the spring cavity 131, and gas is contained in the air cavity 132. During the operation of the nail gun, the spring unit in the spring cavity 131 and the gas in the air cavity 132 are compressed, generating the pressure of the compressed gas and the elastic force of the compressed spring. These two forces can be superimposed to provide power for nailing. Compared with single-type spring nail guns or single-type gas spring nail guns under the same conditions, it can increase power without increasing the manufacturing difficulty of the cylinder. Furthermore, separating the air cavity 132 from the spring cavity 131 allows both to work together while avoiding mutual interference to a certain extent. Moreover, during long-term use, wear in a certain area can be partially repaired and replaced, which is very convenient.

[0090] Furthermore, the spring cavity 131 and the air cavity 132 can be configured such that the spring cavity 131 is in front and the air cavity 132 is behind, or the air cavity 132 is in front and the spring cavity 131 is behind. Only the installation position of the spring needs to be adjusted and the piston 16 and the movable seat 14 need to be adapted to achieve the above-mentioned effect. The structure is diversified and the production and processing are very convenient.

[0091] Furthermore, the spring cavity 131 can be closed. In this structure, after the nail is fired, the spring unit will continuously bounce within the cylinder 13. This continuous bouncing impacts the cylinder 13 or piston 14, generating continuous vibration, i.e., causing a chattering phenomenon. Because the bouncing compresses the sealed gas medium inside the spring cavity 131, creating bouncing resistance, the chattering phenomenon caused by the spring unit can be reduced more quickly, improving the comfort of nail firing. Compared to single-type spring nail guns under the same conditions, this effectively saves the user's effort. Moreover, during the spring compression process, the gas inside the spring cavity 131 can also be compressed simultaneously, further increasing the pressure in conjunction with the air chamber 132, providing greater power for nail firing.

[0092] This invention can also add an air replenishment unit to the air chamber 132. The air replenishment unit is preferably an air valve 19, which is located on the rear end cover 134 of the cylinder body 13 and is used to replenish air to the air chamber 132. When the piston 14 moves backward, compressing air, the air valve 19 is closed. When the firing pin shoots the nail, the vibration generated is sufficient to cause the one-way valve core 191 of the air valve 19 to jump, instantly opening the air valve 19 to replenish air, making the air pressure inside the air chamber 132 consistent with atmospheric pressure, achieving automatic air replenishment and reducing the impact of air leakage on the power mechanism. Furthermore, if it is necessary to increase the power of the nail gun, the user can directly pressurize the air chamber 132 through the air valve 19 and an external pressurizing device when the piston 14 is in the released position. Generally, a gas pressure of 0-0.8 MPa can be preset, thereby generating greater power when the piston compresses. The greater the pre-pressure inside the air chamber 132, the greater the resistance generated when the spring unit continuously jumps after shooting the nail, which can further reduce the vibration effect of the nail gun.

[0093] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A hybrid power mechanism for a nail gun, installed inside the nail gun, for providing power for the nail to be driven out of the nail gun, characterized in that, include: The striking component is used to strike the gun nail. An energy storage component is used to cooperate with the striking component and drive the striking component to perform linear motion. The energy storage component has the following features: The cylinder body, located inside the nail gun, has an internal cavity. A movable seat is movably disposed within the cylinder body, dividing the cavity into a spring chamber and an air chamber; as well as A spring unit is movably mounted within the spring cavity and has at least one energy storage spring; The striking component has: The piston is movably mounted at the front end of the cylinder. A firing pin, mounted on the piston, extends from the cylinder to strike the nail. When the piston is pushed by an external force toward the movable seat, the gas in the air chamber and the energy storage spring in the spring chamber are compressed and generate power.

2. The hybrid power mechanism for a nail gun according to claim 1, characterized in that: in, The spring cavity is located in front of the air cavity, the piston is located inside the spring cavity, and the energy storage spring is installed between the piston and the movable seat.

3. The hybrid power mechanism for a nail gun according to claim 2, characterized in that: in, A gap is provided between the outer periphery of the piston and the inner wall of the spring cavity to connect the spring cavity with the outside.

4. The hybrid power mechanism for a nail gun according to claim 2, characterized in that: in, A piston sealing ring is provided between the outer periphery of the piston and the inner wall of the spring cavity to isolate the spring cavity from the outside.

5. The hybrid power mechanism for a nail gun according to any one of claims 2-4, Its features are: in, An air supply channel is provided on the rear end cover of the cylinder body. This air supply channel is equipped with an air valve for supplying air to the air chamber. The air valve has the following features: A one-way sealing ring is installed at the air inlet end of the air supply channel; A one-way valve core is used to seal the air inlet end of the air supply channel; A spring seat is installed at the air outlet end of the air supply channel; as well as A one-way spring is disposed between the one-way valve core and the spring seat, and abuts the one-way valve core against the one-way sealing ring to seal the air inlet.

6. The hybrid power mechanism for a nail gun according to claim 1, characterized in that: in, The spring chamber is located on the rear side of the air chamber, the piston is located inside the air chamber, and the spring unit is installed between the rear end cover of the chamber and the movable seat.

7. The hybrid power mechanism for a nail gun according to claim 6, characterized in that: in, The rear end cover has a through hole that connects the spring cavity to the outside.

8. The hybrid power mechanism for a nail gun according to any one of claims 1-4 or 6-7, characterized in that: in, The spring unit includes at least one inner spring and an outer spring that houses the at least one inner spring. A buffer pad for cushioning the piston is installed on the front side of the cylinder.

9. The hybrid power mechanism for a nail gun according to claim 8, characterized in that: in, The spring unit includes an inner spring and an outer spring arranged coaxially, wherein the outer spring has the opposite helical direction to the inner spring; Alternatively, the spring unit may include two or more inner springs of different diameters and one outer spring, wherein the inner springs are all coaxially arranged inside the outer spring, and the helical directions of adjacent inner springs are opposite.

10. A nail gun, characterized in that, include: The power mechanism provides the power for the nails inside the nail gun to be struck and ejected. A drive mechanism is used to drive the power mechanism to generate the power. The power mechanism is the hybrid power mechanism for nail guns as described in any one of claims 1-9.

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