A nail gun, a driving device and a power supply unit

Abstract

The present invention provides a nail gun, a driving device and a power supply unit. The nail gun includes a driving device, which includes a power supply unit and a driving unit. The power supply unit includes a cylinder body, which is arranged in the nail gun and has a front side portion and a rear side portion; a rod seat, which is movably arranged in the cylinder body and divides the cylinder body into a front side cavity and a rear side cavity; a nail rod, which is fixedly combined with the rod seat and has a nail end extending from the front side portion for striking the nail; a spring assembly, which is freely installed between the rod seat and the rear side portion and has at least one power supply spring for providing power; and a counter-impact assembly, which is arranged in the rear side cavity and is used to offset the rebound force of the power supply spring when the power supply spring rebounds after supplying power. The power supply spring of the present invention will rebound and hit the counter-impact assembly after completing the nail shooting. The deformation of the counter-impact assembly itself prolongs the impact time of the power supply spring, so that the rebound force of the power supply spring is slowly transferred to the cylinder body, thereby achieving vibration reduction of the rebounding power supply spring.

Description

Technical Field

[0001] The present invention belongs to the technical field of fastening equipment, and in particular relates to a nail gun, a driving unit and a power supply unit. Background Art

[0002] At present, most of the existing nail guns are pneumatic nail guns, which need to be provided with air pressure. When in use, they need to be connected to auxiliary equipment such as air compressors through dedicated lines. When working, they are easily restricted by line length and auxiliary equipment, which is not convenient.

[0003] The Chinese utility model patent with patent number 201921395877.X discloses a nail gun, including a gun body, a gun clip assembly and a nailing component. The gun body includes a power supply unit and a nailing gun nozzle. The gun clip assembly is installed on the nailing gun nozzle. The inner end of the nailing component is inserted in the power supply unit, and the outer end is arranged on the nailing gun nozzle. A driving mechanism is also arranged on the gun body, and the driving mechanism includes a driving motor. A driving wheel is rotatably arranged on the driving motor, and a plurality of teeth are distributed on the driving wheel. The nailing component is provided with a plurality of tooth grooves that cooperate with the teeth.

[0004] The power supply unit includes a guide cylinder and a driving spring. The driving motor moves the nailing component back to the nailing direction through the driving wheel, thereby compressing the driving spring. Then, the driving wheel is separated from the nailing component, and the nailing component is ejected at high speed under the action of the driving spring to achieve nailing. Compared with pneumatic nail guns, it does not require auxiliary equipment such as air compressors, nor does it require air pipes for connection, which greatly simplifies the structure of the nail gun, making it easier to carry and operate.

[0005] However, this type of nail gun also has a common problem, that is, after the driving spring completes a nailing operation, due to the large amount of residual energy in the driving spring, it will quickly rebound to the rear end of the guide cylinder, causing the nail gun to vibrate. After the vibration, the driving spring will rebound back and forth between the nailing component and the guide cylinder and slowly decay, causing the nail gun to vibrate for a period of time. This vibration and vibration not only seriously affects the user's operating feel, but also increases the user's labor intensity, further shortening the overall service life of the nail gun. Summary of the invention

[0006] The object of the present invention is to provide a nail gun, a driving unit and a power supply unit with simple structure, stable operation, low vibration and low noise.

[0007] The object of the present invention is achieved in that:

[0008] The present invention provides a power supply unit for a nail gun, which is installed in a nail gun with a driving unit and is used to provide power for nail shooting. The power supply unit is characterized in that it comprises: a cylinder body, which is arranged in the nail gun and has a front side portion and a rear side portion; a rod seat, which is movably arranged in the cylinder body and divides the cylinder body into a front side cavity and a rear side cavity; a nail shooting rod, which is fixedly combined with the rod seat and has a nail shooting end extending out of the front side portion for striking the nail; a spring assembly, which is freely installed between the rod seat and the rear side portion and has at least one power supply spring for providing power; and a counteracting assembly, which is arranged in the rear side cavity and is used to counteract the rebound force of the power supply spring when the power supply spring rebounds after power supply.

[0009] The power supply unit for the nail gun provided by the present invention may also have such a feature, wherein two power supply springs are provided, the cylinder body also has two guide rods, the two ends of each guide rod are respectively fixed to the front side portion and the rear side portion, the two power supply springs are respectively mounted on the corresponding guide rods, and the rod seat is movably installed on the guide rod.

[0010] The power supply unit for a nail gun provided by the present invention may also have such a feature, wherein the impact assembly has an abutment seat that can abut against the power supply spring and at least one tension spring, the abutment seat has an abutment seat body and a convex column protruding toward the front side portion and arranged on the abutment seat body, the tension spring has a tension spring body and a first pull ring and a second pull ring respectively arranged at both ends of the tension spring body, the second pull ring is fixed on the convex column, the cylinder body also has a fixing rod, the fixing rod passes through between the two power supply springs and is fixed on the inner wall of the rear cavity, and the first pull ring is sleeved on the fixing rod.

[0011] The power supply unit for a nail gun provided by the present invention may also have the following features: the number of tension springs and the number of bosses are both two, the first pull rings of the two tension springs are both sleeved on the fixed rod, the second pull rings of the two tension springs are respectively arranged on the two bosses, the two guide rods are symmetrical about the axis of the cylinder body, the two tension springs are symmetrical about the axis of the cylinder body, the ratio of the elastic coefficient of the power supply spring to the elastic coefficient of the tension spring is 5:1 to 2:1, and the ratio of the length of the power supply spring to the length of the tension spring is 7:2 to 5:2.

[0012] The power supply unit for a nail gun provided by the present invention may also have such a feature, wherein the impact assembly has an abutment seat that can abut against the power supply spring and at least one spring, one end of the spring is fixed to the rear side of the cylinder body, and the other end can be fixed to or abut against the abutment seat.

[0013] The power supply unit for a nail gun provided by the present invention may also have the following characteristics: two springs are provided, the two springs are respectively mounted on two guide rods, the ratio of the elastic coefficient of the power supply spring to the elastic coefficient of the spring is 3:2 to 1:1, and the ratio of the length of the power supply spring to the length of the spring is 17:2 to 15:2.

[0014] The power supply unit for a nail gun provided by the present invention may also have such a feature, wherein the impact assembly has an abutment seat that can abut against the power supply spring and at least one metal spring sheet, the metal spring sheet has a connecting plate fixed to the rear side portion and two open plates arranged on the connecting plate, and the two open plates can abut against the abutment seat.

[0015] The power supply unit for a nail gun provided by the present invention may also have such a feature, wherein the rod seat includes a front buffer, the abutment seat includes a rear buffer, and both the front buffer and the rear buffer are used to buffer the vibration of the power supply spring.

[0016] The present invention provides a driving device, which is installed in a nail gun and is used to provide power for nail shooting. The device is characterized in that it includes: a power supply unit for the nail gun, which is used to provide power for nail shooting; and a driving unit, which is used to drive the power supply unit for the nail gun to generate power, wherein the power supply unit for the nail gun is any of the power supply units for the nail gun described above.

[0017] The present invention provides a nail gun, characterized in that it comprises: a driving device for providing power for nail shooting, wherein the driving device is the above-mentioned driving device.

[0018] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0019] 1. The power supply spring of the present invention will rebound and hit the impact component after completing the nail shooting. The deformation of the impact component itself prolongs the impact time of the power supply spring, so that the rebound force of the power supply spring is slowly transferred to the cylinder body, greatly reducing the impact force received by the cylinder body per unit time, achieving vibration reduction of the rebounding power supply spring, preventing it from swaying, and also reducing the effect of subsequent vibration, ensuring the stability of the nail gun, thereby reducing the labor intensity of the user. At the same time, when the power supply spring is in the energy storage process, the impact component will also be deformed, and can also provide part of the nail shooting force to the rod seat and the nail rod.

[0020] 2. The abutment seat of the present invention is conducive to the installation of the impact elastic member, and at the same time, increases the contact area between the impact elastic member and the force supply spring, which is conducive to the vibration reduction of the nail gun.

[0021] 3. The front elastic gasket and the rear elastic gasket of the present invention can achieve secondary vibration reduction, and at the same time, can also reduce the sound of contact between the force supply spring and the abutment plate, thereby reducing noise pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the nail gun of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the power supply unit, the driving unit and the gun nozzle of the present invention;

[0024] Figure 3 It is an exploded view of the power supply unit and the gun nozzle of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the power supply unit and the gun nozzle of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the power supply unit of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the power supply unit of the present invention without the cylinder body;

[0028] Figure 7 is a cross-sectional view of the power supply unit of the present invention in a natural state;

[0029] Figure 8 yes Figure 7 A cross-sectional view at AA in the middle; and

[0030] Fig. 9 is a cross-sectional view of the power supply unit of the present invention in a compressed state;

[0031] Fig.10 is a cross-sectional view of the second impact assembly installed in the present invention; and

[0032] Fig.11 It is a cross-sectional view of the third type of impact assembly installed in the present invention.

[0033] The meaning of the symbols in the figure:

[0034] 1-power supply unit; 2-driving unit; 3-housing; 4-lithium battery module; 5-gun nozzle; 6-nail feeding device;

[0035] 11-cylinder body; 111-rear side; 112-front side; 12-rod seat; 13-nail rod; 14-force supply spring; 15-impact assembly; 151-abutment plate; 152-tension spring; 1521-first pull ring; 1522-second pull ring; 153-rear elastic gasket; 154-convex column; 155-fixing rod; 156-spring; 1561-joining part; 1562-matching part; 157-metal spring; 1571-connecting piece; 1572-opening piece; 16-guide rod; 17-buffer member; 18-front elastic gasket;

[0036] 20-driving platform; 21-notched gear; 211-tooth portion; 212-notched portion; 22-reducer; 23-driving motor; 24-cam; 25-limit switch; 26-driving tooth. DETAILED DESCRIPTION

[0037] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following embodiments are combined with the accompanying drawings to specifically explain the nail gun, drive unit and power supply unit of the present invention.

[0038] <Example>

[0039] Figure 1 It is a structural schematic diagram of a nail gun of the present invention.

[0040] like Figure 1 As shown, the nail gun includes a gun nozzle 5, a nail feeding device 6, a driving device, a lithium battery module 4 and a housing 3.

[0041] The gun nozzle 5 is provided with a firing channel and a firing port for shooting nails; the nail feeding device 6 has a nail passing channel, in which a nail is installed, and the firing channel is connected to the nail passing channel; the rear end of the gun nozzle 5 is provided with a driving device for driving the nails. The driving device is wrapped with a shell 3, and a handle extends from the rear of the shell 3. A lithium battery module 4 for providing power to the driving unit 2 is installed at the lower end of the handle, and a nail shooting switch for controlling the driving device is provided at the upper end of the handle.

[0042] Figure 2 It is a schematic structural diagram of the power supply unit, the driving unit and the gun nozzle of the present invention.

[0043] like Figure 2 As shown, the driving device includes a power supply unit 1 and a driving unit 2 .

[0044] Among them, the power supply unit 1 is arranged at the rear end of the gun nozzle 5, and is used to provide power for hitting the nail; the driving unit 2 is arranged on one side of the power supply unit 1, as an external device of the power supply unit 1, and is used to control the power supply unit 1 to hit the nail.

[0045] Figure 3 It is an exploded view of the power supply unit and the gun nozzle of the present invention; Figure 4 It is a structural schematic diagram of the power supply unit and the gun nozzle of the present invention.

[0046] like Figure 3-4 As shown, the force supply unit 1 includes a cylinder body 11 , a rod seat 12 , a nail rod 13 , a spring assembly, a buffer component 17 and an impact assembly 15 .

[0047] The cylinder body 11 is made of metal material, and has a front side portion 112 and a rear side portion 111. The front side portion 112 and the rear side portion 111 can be integrally formed at the front and rear ends of the cylinder body, or can be separately arranged at the front and rear ends of the cylinder body. In this embodiment, the front and rear ends of the cylinder body 11 are separately arranged, that is, the front and rear ends of the cylinder body 11 are respectively fixed with the front side portion 112 and the rear side portion 111 by screws, and the front side portion 112 is installed with the gun nozzle 5.

[0048] A rod seat 12 and a nail-shooting rod 13 are movably installed inside the cylinder body 11, and the rod seat 12 divides the cylinder body 11 into a front chamber and a rear chamber. The nail-shooting rod 13 has a mounting end mounted on the rod seat 12 and a nail-shooting end extending from the front side portion 112 for striking the nail. Specifically, a mounting column extends from the middle of the front end surface of the rod seat 12, and a mounting groove is provided on the mounting column. The mounting end of the nail-shooting rod 13 is inserted into the mounting groove and fixedly connected by a mounting pin. The nail-shooting end of the nail-shooting rod 13 passes through the front side portion 112 and then extends into the firing channel of the gun nozzle 5, and is used to strike the nail.

[0049] Figure 5 It is a structural schematic diagram of the power supply unit of the present invention; Figure 6 It is a structural schematic diagram of the power supply unit of the present invention without the cylinder body.

[0050] like Figure 5-6 As shown, the spring assembly is freely installed between the rod seat 12 and the rear side 111, and has at least one power supply spring 14 for providing power. That is, the power supply spring 14 abuts between the rod seat 12 and the rear side 111 of the cylinder body 11, and is used to provide power to the nail rod 13.

[0051] When there is only one force supply spring 14 , the inner cavity of the cylinder body 11 can be designed to be circular and match the outer diameter of the force supply spring 14 .

[0052] When the number of the supply springs 14 is greater than or equal to two, a guide rod 16 that matches the inner diameter of the supply spring 14 can be installed in the cylinder body 11, and each guide rod 16 is fitted with a corresponding supply spring 14. In this embodiment, the number of the supply springs 14 is two, and the cylinder body 11 has two guide rods 16, and the two ends of each guide rod 16 are respectively fixed to the front side portion 111 and the rear side portion 112.

[0053] like Figure 6 As shown, in this embodiment, two vertically parallel and symmetrical guide rods 16 are fixed to the front side 112 and the rear side 111 of the cylinder body 11 , respectively, and each guide rod 16 is sleeved with a force supply spring 14 .

[0054] When the force supply spring 14 is compressed, after being guided by the inner cavity of the cylinder 11 or the guide rod 16, the force supply spring 14 can only deform along its own axial direction, preventing it from twisting and deforming outside the axial direction, which is beneficial to improving energy conversion.

[0055] The rear end of the supply spring 14 is provided with a buffer assembly 15, which is arranged in the rear cavity and forms a buffer space with the rear portion 111 for the deformation of the buffer assembly 15. When the supply spring 14 rebounds after supplying force, it is used to offset the resilience of the supply spring 14.

[0056] In this embodiment, the impact assembly 15 comprises an impact seat that can be in contact with the force supply spring 14, two impact elastic members, and a protruding column 154 and a fixing rod 155 for mounting the impact elastic members.

[0057] Specifically, the abutment seat includes an abutment plate 151 and a rear elastic gasket 153 arranged on the abutment plate 151 and opposite to the force supply spring 14. The upper and lower ends of the abutment plate 151 are formed with two abutment ends for the corresponding guide rod 16 to pass through, and the abutment ends are provided with through holes and are sleeved on the corresponding guide rod 16, so that the abutment plate 151 abuts against the rear end of the force supply spring 14.

[0058] In order to distribute the force evenly, pin holes are opened on the left and right sides of the abutment plate 151, and corresponding bosses 154 are installed on the pin holes. The limiting end of the boss 154 has a limiting edge, and the connecting end of the boss 154 has a connecting hole. When the boss 154 passes through the pin hole, its limiting edge abuts against the abutment plate 151.

[0059] In this embodiment, the fixing rod 155 is installed on the cylinder body 11 at the front side of the abutment plate 151 and is located in the gap between the two force supply springs 14 to prevent the fixing rod 155 from interfering with the movement of the force supply spring 14 .

[0060] In this embodiment, the impact elastic member is two tension springs 152, each of which has a tension spring body and a first tension spring 1521 (equivalent to a joint portion) and a second pull ring 1522 (equivalent to a fixing portion) respectively arranged at both ends of the tension spring body. Specifically, the second pull ring 1522 of the tension spring 152 is connected to the connecting hole of the corresponding convex column 154, and the first pull ring 1521 of the tension spring 152 is connected to the fixing rod 155. Among them, the two tension springs 152 are symmetrically arranged relative to the two guide rods 16, so that the two damping springs and the two force supply springs 14 form a cross structure, which is conducive to more stable force.

[0061] In order to reduce the vibration effect, a rear elastic gasket 153 is further provided between the power supply spring 14 and the abutment plate 151, and a front elastic gasket 18 is provided between the power supply spring 14 and the rod seat 12. The abutment ends of each set of the front elastic gasket 18, the power supply spring 14, the rear elastic gasket 153 and the abutment plate 151 are sequentially mounted on the corresponding guide rod 16.

[0062] In addition, a buffer member 17 is also provided on the inner wall of the front side portion 112 of the cylinder body 11, and the outer edge of the buffer member 17 is close to the inner wall of the metal cylinder body 11. After nailing, the rod seat 12 hits the buffer member 17, and the buffer member 17 shrinks, and the impact force is quickly transmitted to the cylinder body 11, thereby achieving rapid transfer and dissipation.

[0063] The buffer member 17 , the rear elastic gasket 153 and the front elastic gasket 18 are all made of rubber or elastic plastic.

[0064] Figure 7 It is a cross-sectional view of the power supply unit of the present invention in a natural state.

[0065] Figure 7 As shown, the natural state of the power supply unit 1 means that the power supply spring 14 and the impact elastic member are in a naturally extended state. At this time, a buffer spacing H is formed between the abutment plate 151 and the rear side portion 111 of the cylinder body 11 for the abutment plate 151 to move. In this embodiment, the buffer spacing H is the overall length of the buffer space.

[0066] like Figure 2 As shown, a driving platform 20 is integrally formed on one side of the front side portion 112 , and a driving unit 2 is arranged on the driving platform 20 . The driving unit 2 includes a driving tooth 26 arranged on one side of the nail rod 13 , a notched gear 21 installed on the driving platform 20 , a reducer 22 and a driving motor 23 .

[0067] The output end of the driving motor 23 is connected to the input end of the reducer 22 . The output end of the reducer 22 is installed with a notched gear 21 . The notched gear 21 has a tooth portion 211 meshing with the driving teeth 26 and a notched portion 212 not meshing with the driving teeth 26 .

[0068] In order to facilitate installation, the driving platform 20 and the working surface of the front side portion 112 are perpendicular to each other. The driving motor 23 is installed on the lower end surface of the driving platform 20 through the reducer 22, and the notched gear 21 is installed on the upper end surface of the driving platform 20. A cam 24 and a limit switch 25 are also provided above the notched gear 21, and the cam 24 rotates synchronously with the notched gear 21. When the convex portion of the cam 24 touches the limit switch 25, the limit switch 25 controls the driving motor 23 to stop rotating.

[0069] The lithium battery module 4 supplies power to the driving motor 23 , and the nail-shooting switch is used to control the operation of the driving motor 23 .

[0070] Figure 8 yes Figure 7 Cross-sectional view at AA in the middle.

[0071] The driving teeth 26 are arranged on the side of the nail rod 13 close to the notch gear 21, and mesh with the tooth portion 211 of the notch gear 21. Among them, the length of all the driving teeth 26 is adapted to the compressed length of the power supply spring 14, and the number of teeth of the tooth portion 211 is adapted to the number of teeth of all the driving teeth 26. In this embodiment, the tooth portion 211 occupies approximately 3 / 4 of the circumference of the notch tooth, and the notch portion 212 occupies approximately 1 / 4 of the circumference of the notch tooth. At this time, the notch gear 21 rotates 270°, and the movement amount of the nail rod 13 must meet the compression of the power supply spring 14 to the nail shooting position.

[0072] When the tooth portion 211 engages with the driving tooth 26, the rotation of the notched gear 21 can drive the nail rod 13 to move; when the notched portion 212 faces the nail rod 13, that is, the tooth portion 211 does not engage with the driving tooth 26, at this time, the nail rod 13 is in a state without being constrained by the notched gear 21.

[0073] Fig. 9 It is a cross-sectional view of the power supply unit of the present invention in a compressed state.

[0074] like Fig. 9 As shown, under the action of the driving unit 2, the force supply spring 14 is compressed to a position with sufficient kinetic energy to shoot the nail. At this time, the position of the rod seat 12 is defined as the trigger position, which is located between the impact assembly 15 and the front side portion 112 and close to the front side of the fixed rod 155. Then, the rod seat 12 can only move between the trigger position and the front side portion 112.

[0075] When the rod seat 12 is located at the contact position, the abutment plate 151 approaches or contacts the rear side portion 111 of the cylinder body 11 , and the tension spring 152 is stretched accordingly, providing a small portion of nail-shooting kinetic energy to the rod seat 12 and the nail-shooting rod 13 .

[0076] The ratio of the elastic coefficient of the power supply spring 14 to the elastic coefficient of the tension spring 152 is 5:1 to 2:1, and the elastic coefficient of the power supply spring 14 is 2.1N / mm to 2.5N / mm, and the elastic coefficient of the tension spring 152 is 0.8N / mm to 0.85N / mm. The ratio of the length of the power supply spring to the length of the tension spring is 7:2 to 5:2, and the length of the power supply spring 14 is 150mm to 180mm, and the length of the tension spring 152 is 48mm to 62mm. The lengths are all free lengths.

[0077] Preferably, the elastic coefficient of the power supply spring 14 is 2.3N / mm-2.4N / mm, and the elastic coefficient of the tension spring 152 is 0.8N / mm-0.83N / mm. The length of the power supply spring 14 is 160mm-170mm, and the length of the tension spring 152 is 52-58mm.

[0078] In addition, the wire diameter of the force supply spring 14 is 2.4 mm to 2.6 mm, the middle diameter is 21.8 mm to 22.2 mm, the pitch is 12.2 mm to 12.6 mm, and the effective number of turns is 15 to 16. The wire diameter of the tension spring 152 is 0.9 mm to 1.1 mm, the middle diameter is 9.8 mm to 10.2 mm, and the pitch is 0.9 mm to 1.1 mm.

[0079] In this embodiment, the elastic coefficient of the force supply spring 14 is 2.35N / mm, the length is 165mm, the wire diameter is 2.5mm, the middle diameter is 22mm, the pitch is 12.5mm, the total number of turns is 16.5, and the effective number of turns is 15. After a single force supply spring 14 is compressed 102mm and released to perform nail shooting, the spring force value generated by the compression is 240N, and the combined force of the two force supply springs 14 is 480N.

[0080] In this embodiment, the elastic coefficient of the tension spring 152 is 0.83N / mm, the length is 56mm, the wire diameter is 1mm, the median diameter is 10mm, and the pitch is 1mm. The maximum length that the tension spring 152 can stretch during the nail shooting process is 12mm, the force of a single tension spring 152 after stretching is 10N, and the damping force of two tension springs 152 is 20N.

[0081] In this embodiment, when storing energy, the tension spring 152 may not affect the normal operation of the drive unit 2, that is, there is no need to configure a drive motor with a larger load; at the same time, when reducing vibration, the spring 156 can achieve a good vibration reduction effect on the force supply spring 14.

[0082] The specific action process of the nail gun of this embodiment for nail shooting is as follows:

[0083] When working for the first time, Figure 7 As shown, the force supply spring 14 is in a naturally extended state. Pressing the nail shooting switch, the driving motor 23 works, and the notch gear 21 is driven to rotate through the reducer 22. At this time, the tooth portion 211 of the notch gear 21 and the driving tooth 26 are meshed with each other, thereby driving the nail shooting rod 13 and the rod seat 12 to move backward, compressing the force supply spring 14, and doing work on the tension spring 152. Fig. 9 As shown, when the supply spring 14 reaches the trigger position, the convex portion of the cam 24 above the notch gear 21 touches the limit switch 25, and stops the driving motor 23. At this time, the tooth portion 211 of the notch gear 21 near the notch portion 212 is still engaged with the driving tooth 26 of the nail rod 13.

[0084] When nail shooting is required, the user presses the nail shooting switch again, driving the motor 23 to rotate in the same direction, and the teeth of the notched gear 21 disengage from the driving teeth, that is, the notched portion 212 is opposite to the nail shooting rod 13 and loses the restraining effect. At this time, the rod seat 12 and the nail shooting rod 13 move forward quickly under the action of the power supply spring 14 and the tension spring 152, and a nail shooting is achieved.

[0085] After nailing is completed, the supply spring 14 rebounds backwards. As the rear end of the supply spring 14 approaches the rear side portion 111, the tension spring 152 is continuously stretched to provide a force toward the front side portion to the supply spring 14, so that the rear end of the supply spring 14 does not contact the rear side portion 111 of the cylinder body 11, or even if it contacts, the force of the supply spring 14 on the rear side portion 111 can be greatly reduced, that is, the impact of the supply spring 14 on the cylinder body 11 is suppressed. In the process of the supply spring 14 vibrating (rebounding back and forth in the cylinder body), under the tension of the tension spring 152, each time the rear end of the supply spring 14 moves backward, the rear end of the supply spring 14 is pulled.

[0086] At the same time, the driving motor 23 continues to rotate in the same direction, and the gear portion of the notched gear 21 will mesh with the driving teeth 26 of the nail again, and continue to push the nail rod 13 and the rod seat 12 to move backward, compressing the force supply spring 14 and doing work on the tension spring 152. When the force supply spring 14 reaches the maximum compression position, the convex portion of the cam 24 touches the limit switch 25 and stops the driving motor 23, and once again reaches the position as shown in the figure. Fig. 9 The position shown is ready for the next nailing.

[0087] Functions and Effects of the Embodiments

[0088] The present embodiment provides a driving device and a nail gun including the driving device, wherein the driving device includes a power supply unit for providing nail shooting power and a driving unit for driving the power supply unit to impact the nail, wherein the power supply unit includes a cylinder, a rod seat, a nail shooting rod, a spring assembly and a counter-impact assembly, wherein the counter-impact assembly is installed in the rear cavity, and when the power supply spring rebounds after power supply, it is used to offset the rebound force of the power supply spring. The power supply spring of the present invention will rebound and impact the counter-impact assembly after completing nail shooting, and the deformation of the counter-impact assembly itself prolongs the impact time of the power supply spring, so that the rebound force of the power supply spring is slowly transferred to the cylinder, greatly reducing the impact force received by the cylinder per unit time, achieving vibration reduction of the rebounding power supply spring, preventing it from swaying, and reducing the effect of subsequent vibration, ensuring the stability of the nail gun, thereby reducing the labor intensity of the user. At the same time, when the power supply spring is in the energy storage process, the counter-impact assembly will also deform, and can also provide a part of the nail shooting force to the rod seat and the nail shooting rod.

[0089] In addition, the impact assembly includes an abutment seat abutting against the rear end of the force supply spring and at least one impact elastic member. The abutment seat is conducive to the installation of the impact elastic member. At the same time, it can increase the contact area between the impact elastic member and the force supply spring, which is beneficial to the vibration reduction of the nail gun.

[0090] The spring assembly includes two symmetrically arranged guide rods and two force supply springs sleeved on the guide rods. The impact assembly also includes a fixing rod passing through between the two force supply springs and fixed on the rear cavity and a convex column arranged on the abutment seat. The impact elastic member is arranged as a tension spring. The first pull ring is fixed to the cylinder body through the fixing rod, and the second pull ring is fixed to the abutment seat through the convex column. The tension spring is installed in the cylinder body part where the force supply spring is located, so that the length of the buffer space can be fully utilized, making the structure of the cylinder body more compact. In addition, the guide rods can be respectively installed with corresponding force supply springs to prevent them from twisting and deforming outside the axial direction, which is conducive to improving energy conversion.

[0091] In addition, the impact assembly includes two tension springs symmetrically arranged relative to the two guide rods, so that the two damping springs and the two force supply springs 14 form a cross structure, which is conducive to more stable force.

[0092] In addition, the rod seat moves between the trigger position where it starts to move toward the front side after the force supply spring is compressed and the front side, and the trigger position is located between the impact assembly and the front side to prevent the impact assembly from interfering with the movement of the rod seat.

[0093] In addition, the rod seat has a front elastic gasket opposite to the power supply spring, and the abutment seat includes an abutment plate and a rear elastic gasket arranged on the abutment plate and opposite to the power supply spring. The front elastic gasket and the rear elastic gasket can achieve secondary vibration reduction, and at the same time, can also reduce the sound of the contact between the power supply spring and the abutment plate, thereby reducing noise pollution.

[0094] In addition, because the ratio of the elastic coefficient of the supply spring to the elastic coefficient of the tension spring is 5:1 to 2:1, and the ratio of the length of the supply spring to the length of the tension spring is 7:2 to 5:2, the tension spring will not affect the normal operation of the drive unit when storing energy, that is, there is no need to configure a drive motor with a larger load; at the same time, when reducing vibration, it can achieve a good vibration reduction effect on the supply spring.

[0095] <Modification 1>

[0096] Fig.10 It is a cross-sectional view of the second impact assembly installed in the present invention.

[0097] like Fig.10 As shown, in this variation, two guide rods 16 are provided in the cylinder body 11, and a force supply spring 14 is provided on each guide rod 16. An abutment plate 151 is installed at the rear end of the force supply spring 14. In this embodiment, abutment ends are provided at both upper and lower ends of the abutment plate 151, and each abutment end is provided with a through hole and is mounted on the corresponding guide rod 16, so that the abutment end of the abutment plate 151' abuts against the rear end of the force supply spring 14.

[0098] Among them, the impact elastic member is a spring 156 (equivalent to a compression spring), and there are two of them. The spring 156 is sleeved on the rear end of the guide rod 16 and is located between the abutment plate 151' and the rear side portion 111 of the cylinder body 11, and the coupling portion 1561 of the spring 156 is fixed to the rear side portion of the cylinder body 11; its matching portion 1561 serves as an abutment portion to abut on the abutment plate 151', or its matching portion 1561 serves as a fixed portion fixedly connected to the abutment plate 151'.

[0099] The ratio of the elastic coefficient of the power supply spring 14 to the elastic coefficient of the spring 156 is 3:2 to 1:1, and the elastic coefficient of the power supply spring 14 is 2.1N / mm to 2.5N / mm, and the elastic coefficient of the spring 156 is 1.8N / mm to 2.2N / mm. The ratio of the length of the power supply spring to the length of the tension spring is 17:2 to 15:2, and the length of the power supply spring 14 is 150mm to 180mm, and the length of the spring 156 is 18mm to 22mm. The lengths are all free lengths. This arrangement can ensure that when storing energy, the spring 156 will not affect the normal operation of the drive unit, that is, there is no need to configure a drive motor with a larger load; at the same time, when reducing vibration, the spring 156 can achieve a good vibration reduction effect on the power supply spring.

[0100] Preferably, the elastic coefficient of the power supply spring 14 is 2.3N / mm-2.4N / mm, and the elastic coefficient of the spring 156 is 1.95N / mm-2.05N / mm. The length of the power supply spring 14 is 160mm-170mm, and the length of the spring 156 is 19.7mm-20.3mm.

[0101] In addition, the wire diameter of the power supply spring 14 is 2.4mm-2.6mm, the middle diameter is 21.8mm-22.2mm, the pitch is 12.2mm-12.6mm, and the effective number of turns is 15-16. The wire diameter of the spring 156 is 1.5mm-1.7mm, the middle diameter is 22mm-22.4mm, and the pitch is 4.9mm-5.1mm.

[0102] In this embodiment, the elastic coefficient of the force supply spring 14 is 2.35N / mm, the length is 165mm, the wire diameter is 2.5mm, the middle diameter is 22mm, the pitch is 12.5mm, the total number of turns is 16.5, and the effective number of turns is 15. After a single force supply spring 14 is compressed 102mm and released to perform nail shooting, the spring force value generated by the compression is 240N, and the combined force of the two force supply springs 14 is 480N.

[0103] In this embodiment, the elastic coefficient of the spring 156 is 2N / mm, the length is 20mm, the wire diameter is 1.6mm, the median diameter is 22mm, and the pitch is 5mm. The maximum length that the spring 156 can be compressed during the nail shooting process is 10mm, the force of a single spring 156 after compression is 20N, and the damping force of the two springs 156 is 40N.

[0104] The structure of the impact assembly is simple, easy to install, and can greatly reduce the movement and vibration of the nail gun. However, the length of the spring 156 occupies a part of the buffer space. When the parameters such as the force supply spring and the buffer spacing are the same, the buffer space length of this embodiment is longer than that of the above embodiment, which will increase the length and weight of the nail gun.

[0105] In addition, in order to reduce the vibration effect, a rear elastic gasket 153 is also provided between the force supply spring 14 and the abutment plate 151'. Each set of the force supply spring 14, the rear elastic gasket 153, the abutment end of the abutment plate 151' and the spring 156 are sequentially mounted on the corresponding guide rod 16.

[0106] <Modification 2>

[0107] Fig.11 It is a cross-sectional view of the third type of impact assembly installed in the present invention.

[0108] like Fig.11 As shown, in this modified example, two guide rods 16 are arranged in the cylinder body 11 , and a force supply spring 14 is arranged on each guide rod 16 .

[0109] The impact component is a metal spring sheet, which has a connecting piece 1571 (joining part) matched with the cylinder body 11 and two open pieces 1572 arranged on the connecting piece 1571. The two open pieces 1572 can abut against the abutment plate 151" and are symmetrically arranged along the center line of the cylinder body.

[0110] In this embodiment, corresponding mating portions 1572 are respectively provided at both ends of the connecting piece 1571 and are inclined outward, and the two open pieces 1572 correspond one-to-one to the two abutment plates 151", that is, each open piece 1572 abuts against the corresponding abutment plate 151". A through hole is provided on the abutment plate 151", and is mounted on the corresponding guide rod 16, and abuts against the force supply spring 14 on the guide rod 16.

[0111] In addition, in order to reduce the vibration effect, a rear elastic gasket 153 is also provided between the force supply spring 14 and the abutment plate 151 ″. The force supply spring 14 , the rear elastic gasket 153 and the abutment plate 151 ″ are all sequentially mounted on the corresponding guide rod 16 .

[0112] This modification has the advantages of simple structure and convenient installation.

[0113] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A power supply unit for a nail gun, installed in a nail gun having a driving unit, for providing power for nailing, characterized in that: include: A cylinder body, disposed in the nail gun, having a front side portion and a rear side portion; A rod seat is movably disposed in the cylinder body, dividing the cylinder body into a front chamber and a rear chamber; A nail-shooting rod, fixedly combined with the rod seat, having a nail-shooting end extending out of the front side portion for striking the nail; a spring assembly, freely mounted between the rod seat and the rear side portion, having at least one supply spring for providing the power; as well as The offset assembly is arranged in the rear cavity and is used to offset the rebound force of the supply spring when the supply spring rebounds after supplying force. Wherein, the force supply spring is provided with two, The cylinder body also has two guide rods, and the two ends of each guide rod are respectively fixed to the front side portion and the rear side portion. The two force supply springs are respectively sleeved on the corresponding guide rods. The rod seat is movably mounted on the guide rod. The impact assembly comprises an abutment seat capable of abutting against the force supply spring and at least one tension spring. The abutment seat comprises an abutment seat body and a convex column disposed on the abutment seat body and protruding toward the front side portion. The tension spring comprises a tension spring body and a first pull ring and a second pull ring respectively arranged at two ends of the tension spring body, wherein the second pull ring is fixed on the protruding column. The cylinder body also has a fixing rod, which passes through between the two force supply springs and is fixed on the inner wall of the rear cavity, and the first pull ring is sleeved on the fixing rod.

2. The power supply unit for a nail gun according to claim 1, characterized in that: in, The tension spring and the protruding column are both provided in two numbers, The first pull rings of the two tension springs are both sleeved on the fixing rod. The second pull rings of the two tension springs are respectively arranged on the two protruding pillars. The two guide rods are symmetrical about the axis of the cylinder body. The two tension springs are symmetrical about the axis of the cylinder body, The ratio of the elastic coefficient of the force supply spring to the elastic coefficient of the tension spring is 5:1 to 2:

1. The ratio of the length of the force supply spring to the length of the tension spring is 7:2~5:

2.

3. The power supply unit for a nail gun according to claim 1 or 2, characterized in that: in, The rod seat includes a front buffer member, The abutment seat includes a rear buffer member, The front buffer member and the rear buffer member are both used to buffer the vibration of the force supply spring.

4. A driving device installed in a nail gun for providing power for nail shooting, characterized in that: include: A power supply unit for a nail gun, used to provide power for nail shooting; as well as A driving unit, used to drive the nail gun power supply unit to generate the power, Among them, the power supply unit for the nail gun is the power supply unit for the nail gun as described in any one of claims 1 to 3.

5. A nail gun, characterized in that: include: The driving device is used to provide power for nail shooting. Wherein, the driving device is the driving device described in claim 4.

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