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

Abstract

The present invention provides a separate power supply unit, a driving device and a nail gun, belonging to the technical field of fastening equipment, wherein the separate power supply unit comprises: a cylinder body, arranged in the nail gun, having a front side portion and a rear side portion; a rod seat, movably arranged in the cylinder body, dividing the cylinder body into a front side cavity and a rear side cavity; a nail rod, fixedly combined with the rod seat, having a nail end extending from the front side portion for nailing; and at least one group of spring components, freely installed between the rod seat and the rear side portion, having a power supply spring abutting against the rod seat and an interference spring abutting against the rear side portion, wherein the power supply spring and the interference spring are combined with each other, the elastic coefficient of the power supply spring is less than the elastic coefficient of the interference spring, and the length of the power supply spring is greater than the length of the interference spring. The impact force acting on the cylinder body is reduced, and the vibration reduction effect is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of fastening equipment, and relates to a separate power supply unit, a driving device with the separate power supply unit, and a nail gun with the driving device. 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] In order to solve the above problems, a separate power supply unit is provided, which is installed in a nail gun and used to provide power for nail shooting. The present invention adopts the following technical solutions:

[0007] The present invention provides a separate force supply unit, characterized in that it includes: a cylinder body, which is arranged in a 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 out of the front side portion for nail shooting; and at least one group of spring components, which is freely installed between the rod seat and the rear side portion, and has a force supply spring abutting against the rod seat and an interference spring abutting against the rear side portion, wherein the force supply spring and the interference spring are combined with each other, the elastic coefficient of the force supply spring is smaller than the elastic coefficient of the interference spring, and the length of the force supply spring is greater than the length of the interference spring.

[0008] The separate force supply unit provided by the present invention may also have such a feature, wherein a plurality of spring assemblies are provided, a plurality of guide rods are centrally symmetrically arranged in the cylinder body, the two ends of each guide rod are respectively fixed to the front side portion and the rear side portion, the rod seat is movably installed on the plurality of guide rods, the plurality of spring assemblies are arranged one by one corresponding to the plurality of guide rods, and the force supply springs and interference springs are sleeved on the corresponding guide rods.

[0009] The separate force supply unit provided by the present invention may also have such a feature, wherein the spring assembly further has a connecting piece, and the force supply spring and the interference spring are connected to each other through the connecting piece.

[0010] The separate power supply unit provided by the present invention may also have the following characteristics, wherein the rod seat includes a front buffer for buffering the vibration of the power supply spring, and the rear side includes a rear buffer for buffering the vibration of the interference spring.

[0011] The separate power supply unit provided by the present invention may also have the following characteristics, wherein the ratio of the elastic coefficient of the power supply spring to the elastic coefficient of the interference spring is 1:10 to 1:2, and the ratio of the length of the power supply spring to the length of the interference spring is 5:2 to 5:4.

[0012] The separate power supply unit provided by the present invention may also have the following characteristics: the elastic coefficient of the power supply spring is 1.1N / mm~2.1N / mm, the elastic coefficient of the interference spring is 2.0N / mm~8.5N / mm, the length of the power supply spring is 70mm~130mm, and the length of the interference spring is 40mm~80mm.

[0013] The separate power supply unit provided by the present invention may also have the following characteristics: the elastic coefficient of the power supply spring is 1.5N / mm~1.7N / mm, the elastic coefficient of the interference spring is 5.0N / mm~5.5N / mm, the length of the power supply spring is 98mm~102mm, and the length of the interference spring is 58mm~62mm.

[0014] The present invention provides a driving device installed in a nail gun for providing power for nail shooting, characterized in that it includes: a separate power supply unit for providing power for nail shooting; and a driving unit for driving the separate power supply unit to generate power, wherein the power supply unit is the separate power supply unit of any one of claims 1-7.

[0015] 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 driving device of claim 8.

[0016] Function and Effect of the Invention

[0017] According to the nail gun of the present invention, there is a driving device and the driving device has a separate power supply unit. The separate power supply unit includes a cylinder body, a rod seat, a nail rod and a spring assembly. The spring assembly has a power supply spring and an interference spring combined with the power supply spring. The interference spring is arranged behind the power supply spring, and the elastic coefficient of the power supply spring is set to be smaller than the elastic coefficient of the interference spring and the length of the power supply spring is greater than the elastic coefficient of the interference spring. In the process of rebounding after nail shooting, the spring assembly can cause different accelerations caused by different rebound forces of the power supply spring and the impact spring, resulting in mutual buffering of the power supply spring and the impact spring, reducing the acceleration of rebound, thereby offsetting part of the rebound force. The impact force acting on the cylinder body is also reduced, achieving the effect of vibration reduction. At the same time, due to the reduction of the acceleration of rebound, the vibration time of the spring assembly is also reduced, ensuring the stability of the nail gun and reducing the labor intensity of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the three-dimensional structure of a nail gun in an embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the driving device and the gun nozzle in the embodiment of the present invention;

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the separated power supply unit and the gun nozzle in the embodiment of the present invention;

[0021] Figure 4 It is an exploded view of a separate power supply unit and a gun nozzle in an embodiment of the present invention;

[0022] Figure 5 is a schematic diagram of the three-dimensional structure of a separate power supply unit in an embodiment of the present invention;

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the separated power supply unit without the cylinder body in the embodiment of the present invention;

[0024] Figure 7is a cross-sectional view of a separate power supply unit in a natural state according to an embodiment of the present invention;

[0025] Figure 8 It is a cross-sectional view of convex 7 at AA;

[0026] Fig. 9 It is a cross-sectional view of the separate power supply unit in the embodiment of the present invention in a compressed state. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention is described below with reference to the accompanying drawings and embodiments.

[0028] <Example>

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the nail gun in the embodiment of the present invention.

[0030] like Figure 1 As shown, this embodiment provides a nail gun 100 for nail shooting, including a driving device 1, a housing 2, a handle 3, a lithium battery module 4, a gun nozzle 5 and a nail feeding device 6.

[0031] The driving device 1 is used to provide power for nail shooting. The outer shell 2 is wrapped around the outside of the driving device 1, and a handle 3 for a person to hold is provided on the outer shell 2, and a nail shooting switch for controlling the nail shooting is also provided on the handle 3. The lithium battery module 4 is used to power the driving device 1 and is provided at the end of the handle 3. The gun nozzle 5 is installed on the driving device 1, and the nail is shot out from the gun nozzle 5. The nail feeding device 6 has a channel for accommodating a nail row, which is used to push the nails in the nail row to the gun nozzle in sequence.

[0032] Figure 2 It is a three-dimensional structural schematic diagram of a driving device and a gun nozzle in an embodiment of the present invention.

[0033] like Figure 2 As shown, the driving device 1 includes a separate power supply unit 10 and a driving unit 20 .

[0034] The separate power supply unit 10 is arranged at the rear end of the gun nozzle 5 to provide power for nail shooting. The driving unit 20 is used to drive the separate power supply unit 10 to generate power.

[0035] Figure 3 It is a schematic diagram of the three-dimensional structure of the separated power supply unit and the gun nozzle in the embodiment of the present invention. Figure 4 It is an exploded view of the separate power supply unit and the gun nozzle in the embodiment of the present invention. Figure 5 It is a schematic diagram of the three-dimensional structure of the separate power supply unit in an embodiment of the present invention.

[0036] like Figures 3 to 5As shown, the separate type power supply unit 10 comprises a cylinder body 11 , a guide rod 12 , a rod seat 13 , a nail rod 14 and a spring assembly 15 .

[0037] The cylinder 11 is made of metal material, mounted at the rear end of the gun nozzle 5, and has a front side 111 and a rear side 112. The front side 111 and the rear side 112 can be integrally formed at the front and rear ends of the cylinder 11, or can be separately arranged at the front and rear ends of the cylinder 11.

[0038] In this embodiment, the front side portion 111 and the rear side portion 112 are separately provided, that is, the cylinder body 11 has a front end cover, a columnar shell 113 and a rear end cover.

[0039] The front end cover is the front side portion 111 , and the front end cover is fixed to the front end of the columnar housing 113 by bolts.

[0040] The rear portion 112 has a rear end cover and two rear buffer components 1121 .

[0041] The rear end cover is fixed to the rear end of the columnar housing 113 by bolts.

[0042] Two rear buffer members 1121 are fixed on one side of the rear end cover facing the rear cavity 11 b.

[0043] There can be multiple guide rods 12, and the multiple guide rods 12 are centrally symmetrically arranged in the cylinder body 11. The two ends of each guide rod 12 are respectively fixed to the front side portion 111 and the rear side portion 112. In this embodiment, the guide rods 12 are set to two, and the two guide rods 12 are symmetrically installed in the cylinder body 11.

[0044] Figure 6 It is a schematic diagram of the three-dimensional structure of the separated power supply unit without the cylinder body in the embodiment of the present invention. Figure 7 It is a cross-sectional view of the separate power supply unit in the embodiment of the present invention in a natural state. Figure 8 It is a cross-sectional view of convex 7 at AA.

[0045] like Figures 6 to 8 As shown, the rod seat 13 is movably mounted on the two guide rods 12, located in the cylinder body 11, and divides the cylinder body 11 into a front chamber 11a and a rear chamber 11b. The rod seat 13 can slide along the extending direction of the guide rods 12.

[0046] The rod seat 13 includes a rod seat body 131 , two front buffer members 132 and two front gaskets 133 .

[0047] The rod seat body 131 is in an “8” shape and is sleeved on the two guide rods 12 .

[0048] The two front buffer members 132 are fixed on a side surface of the rod seat body 131 facing the rear cavity 11 b.

[0049] The front buffer member 132 and the rear buffer member 1121 are both rubber washers, which are respectively sleeved on the corresponding guide rods 12 to buffer the vibration of the spring assembly 15 .

[0050] The two front gaskets 133 are sleeved on the corresponding guide rods 12 and are located on a side of the front buffer member 132 away from the rod seat body 131 .

[0051] The nail-shooting rod 14 is fixedly combined with the rod seat 13, and has a nail-shooting end 141 and a connecting end 142. The nail-shooting end 141 extends out of the front side portion 111 and enters the gun nozzle 5, and is used to hit the nail to shoot the nail. The connecting end 142 is fixedly connected to the rod seat body 131 through a mounting pin, so that the nail-shooting rod 14 moves along the extension direction of the guide rod 12 with the rod seat 13.

[0052] The nail-shooting rod 14 has a rack 142 arranged along the extending direction of the nail-shooting rod 14 .

[0053] The spring assembly 15 is provided in two pieces, and both are freely installed between the rod seat 13 and the rear side portion 112. The spring assembly 15 has a supply spring 151, an interference spring 152, and a connecting piece 153. The supply spring 151 and the interference spring 152 are combined with each other.

[0054] The connecting piece 153 is movably sleeved on the guide rod 12 and is located between the rod seat 13 and the rear side portion 112. The connecting piece 153 is an annular gasket.

[0055] The force supply spring 151 is sleeved on the corresponding guide rod 12 and is located on the side of the connecting piece 153 close to the rod seat 13. One end of the spring abuts against the rod seat and the other end is fixed on the connecting piece 153.

[0056] The interference spring 152 is sleeved on the corresponding guide rod 12 and is located on a side of the connecting piece 153 close to the rear side portion 112 . One end of the interference spring 152 abuts against the rear side portion 112 and the other end is fixed on the connecting piece 153 .

[0057] The supply spring 151 and the interference spring 152 are connected to each other via a connecting piece 153 .

[0058] The force supply spring 151 and the interference spring 152 provide the set power together after being compressed, that is, provide the power for the setting rod to hit the nail. The interference spring 152 is used to resist the elastic force when the spring assembly reciprocates in the cylinder after the nail is shot.

[0059] The elastic coefficient of the force supply spring 151 is smaller than the elastic coefficient of the interference spring 152, and the length of the force supply spring 151 is greater than the length of the interference spring 152, so as to reduce the vibration of each spring when it moves back and forth in the cylinder 11 after nail shooting, that is, to reduce the vibration value (acceleration value) during movement.

[0060] Specifically, the ratio of the elastic coefficient of the supply spring 151 to the elastic coefficient of the interference spring 152 is 1:10 to 1:2, and the elastic coefficient of the supply spring 151 is 1.1N / mm to 2.1N / mm, and the elastic coefficient of the interference spring 152 is 2.0N / mm to 8.5N / mm. The ratio of the length of the supply spring 151 to the length of the interference spring 152 is 5:2 to 5:4, and the length of the supply spring 151 is 70mm to 130mm, and the length of the interference spring 152 is 40mm to 80mm.

[0061] Preferably, the elastic coefficient of the supply spring 151 is 1.5N / mm to 1.7N / mm, and the elastic coefficient of the interference spring 152 is 5.0N / mm to 5.5N / mm. The length of the supply spring 151 is 98mm to 102mm, and the length of the interference spring 152 is 58mm to 62mm.

[0062] In this embodiment, the elastic coefficient of the force supply spring 151 is 1.7 N / mm, the elastic coefficient of the interference spring 152 is 5.3 N / mm, the length of the force supply spring 151 is 100 mm, and the length of the interference spring 152 is 60 mm.

[0063] The driving unit 20 includes a driving platform 21 , a notched gear 22 , a reducer 23 , a driving motor 24 , a cam 25 and a limit switch 26 .

[0064] The driving platform 21 is fixedly mounted on the cylinder body 11 and is located near the front side portion 111 .

[0065] The notched gear 22 has a tooth portion 221 and a notched portion 222. The tooth portion 221 is adapted to the length of the rack 142 on the nail rod 14, and the length of the rack 142 is adapted to the overall compression length of the supply spring 151 and the interference spring 152. In this embodiment, the tooth portion 221 occupies approximately 3 / 4 of the circumference of the notched gear 22, and the notched portion 222 occupies approximately 1 / 4 of the circumference of the notched gear 22.

[0066] The toothed portion 221 engages with the rack 142 on the nail rod 14 to drive the nail rod 14 to move toward the rear side portion 112 , and compresses the force supply spring 151 and the interference spring 152 through the rod seat 13 connected to the nail rod 14 .

[0067] The input end of the reducer 23 is connected to the driving motor 24 and driven by the driving motor 24 . The output end of the reducer 23 is provided with a notched gear 22 .

[0068] The driving motor 24 is electrically connected to the lithium battery module 4 and is powered by the lithium battery module 4 .

[0069] Fig. 9 It is a cross-sectional view of the separate power supply unit in the embodiment of the present invention in a compressed state.

[0070] The driving motor 24 drives the reducer 23 to rotate, so that the notch gear 22 rotates, and the tooth portion 221 of the notch paper wheel 22 meshes with the rack 142 on the nail rod 14, thereby pushing the nail rod 14 and the rod seat 13 to move toward the direction close to the rear side portion 112, thereby compressing the supply spring 151 and the interference spring 152, and becoming as shown in Fig. 9 When shooting a nail, the force supply spring 151 and the interference spring 152 are released, and the rod seat 13 moves rapidly toward the front side portion 112 under the joint push of the force supply spring 151 and the interference spring 152, so that the nail rod 14 hits the nail and shoots the nail out from the gun nozzle 5.

[0071] The cam 25 is disposed on the notch gear 22 and rotates synchronously with the notch gear 22 .

[0072] The limit switch 26 is arranged near the cam 25 and is electrically connected to the drive motor 24. When the cam 25 touches the limit switch 26, the limit switch 26 controls the drive motor 23 to stop rotating.

[0073] In this embodiment, the specific action process of the nail gun 100 for nail shooting is as follows:

[0074] When working for the first time, Figure 7 As shown, the force supply spring 151 and the interference spring 152 are both in a naturally extended state. The driving motor 24 works, driving the notch gear 22 to rotate through the reducer 23, at which time the tooth portion 221 of the notch gear 22 and the rack 142 on the nail rod 14 are engaged, thereby driving the nail rod 14 and the rod seat 13 to move backward and compressing the force supply spring 151 and the interference spring 152.

[0075] When the supply spring 151 and the interference spring 152 reach Fig. 9 When in the trigger position shown, the cam 25 on the notch gear 22 touches the limit switch 26, thereby controlling the drive motor 24 to stop working. At this time, the tooth portion 221 near the notch portion 222 in the notch gear 22 is also engaged with the rack 142 of the nail rod 13.

[0076] When nail shooting is required, the user presses the nail shooting switch, and the driving motor 24 continues to drive the notched gear 22 to rotate, and the tooth portion 221 of the notched gear 22 disengages from the rack 142 of the nail shooting rod 13, that is, the notched portion 222 is opposite to the rack 142 of the nail shooting rod 13, so that the nail shooting rod 13 loses its restraint. At this time, the rod seat 13 and the nail shooting rod 14 move forward quickly under the action of the power supply spring 151 and the interference spring 152, and a nail shooting is achieved.

[0077] After the nail shooting is completed, the force supply spring 151 and the interference spring 152 rebound backwards together. During the rebound process, the force supply spring 151 and the interference spring 152 have different rebound forces, that is, the rebound accelerations are different. However, since the force supply spring 151 and the interference spring 152 are connected to each other through the connecting piece 153, the force supply spring 151 and the interference spring 152 can buffer and traction each other to reduce the overall rebound acceleration of the spring assembly 15, thereby reducing the impact on the cylinder body.

[0078] The following is a comparison of the vibration values ​​(ie, acceleration values) after nailing of the nail gun 100 having the supply spring 151 and the interference spring 152 as the spring assembly 15 in this embodiment and the conventional nail gun in the prior art having only a single spring as the spring assembly.

[0079] In this comparison test, the wire diameter of the force supply spring 151 is Φ=2mm; the middle diameter Φ=20mm; the pitch t=9mm; the effective number of turns n=11; the free height (ie, length) is 100mm; and the stiffness (ie, elastic coefficient) is K=1.7N / mm.

[0080] The wire diameter of the interference spring 152 is Φ=2.4; the middle diameter is Φ=22.5; the pitch is t=9 mm; the effective number of turns is n=6; the free height (ie, length) is 60 mm; and the stiffness (ie, elastic coefficient) is K=5.3 N / mm.

[0081] In comparison, a traditional nail gun also has two parallel springs, with a single spring having a wire diameter of Φ=2.4 mm, a middle diameter of Φ=26 mm, a pitch of t=12 mm, an effective number of turns n=13, a free height (i.e., length) of 160 mm, and a stiffness (i.e., elastic coefficient) of K=1.68 N / mm.

[0082] In the comparative test, the spring assembly 15 formed by the power supply spring 151 + interference spring 152 and the above-mentioned single spring are compressed to 100mm, and the elastic force is 160N. Then the spring is released to hit the nail to drive the nail. After the nail driving is completed, when each spring rebounds, the acceleration value of the power supply spring 151 + interference spring 152 and the single spring is measured. Since the rebound force is difficult to measure directly, the magnitude of the rebound force can be determined by measuring the acceleration of the spring when it rebounds.

[0083] Table 1 is a comparison table of acceleration values ​​of the power supply spring + interference spring in the nail gun 100 of this embodiment and a single spring in a traditional nail gun.

[0084] Table 1

[0085]

[0086] It can be clearly seen from Table 1 that after nailing, the acceleration value of the spring assembly 15 formed by the combination of the power supply spring 151 + the interference spring 152 is significantly lower than the acceleration value of a single spring, and the average acceleration value decreases by 20.2%, that is, the rebound force of the nail gun 100 provided in this embodiment after nailing is significantly lower than the rebound force of the transmission nail gun after nailing. In addition, due to the reduction in rebound force, in the actual nailing process, the nailing feel of the nail gun 100 provided in this embodiment is significantly better than that of the traditional nail gun.

[0087] Example Function and Effect

[0088] The nail gun provided in this embodiment has a driving device and the driving device has a separate power supply unit. The separate power supply unit includes a cylinder body, a rod seat, a nail rod and a spring assembly. The spring assembly has a power supply spring and an interference spring combined with the power supply spring. The interference spring is arranged behind the power supply spring, and the elastic coefficient of the power supply spring is set to be smaller than the elastic coefficient of the interference spring and the length of the power supply spring is greater than the elastic coefficient of the interference spring. In the process of rebounding after nail shooting, the spring assembly can cause different accelerations caused by different rebound forces of the power supply spring and the impact spring, resulting in mutual buffering of the power supply spring and the impact spring, reducing the acceleration of rebound, thereby offsetting part of the rebound force. The impact force acting on the cylinder body is also reduced, achieving the effect of vibration reduction. At the same time, due to the reduction of the acceleration of rebound, the vibration time of the spring assembly is also reduced, ensuring the stability of the nail gun and reducing the labor intensity of the user.

[0089] In addition, by providing a force supply spring with a larger elastic coefficient at the rear end of the force supply spring, the rebound force of the spring assembly can be reduced. The structure is simple and can be achieved through simple modification of the existing technology, thereby reducing production costs.

[0090] In addition, two spring assemblies are provided, and two corresponding guide rods are provided in the cylinder body. The force supply spring and the interference spring are both mounted on the corresponding guide rods and are retracted and extended along the extension direction of the guide rods, thereby avoiding the spring assemblies from moving and interfering with each other when compressed in the cylinder body, thereby improving the stability of nail shooting.

[0091] In addition, the spring assembly has a connecting plate, and the force supply spring and the interference spring are combined through the connecting plate, so that one end of the force supply spring and the interference spring can be fixedly connected together, so that the acceleration of the two ends is the same, and during the rebound process, the force supply spring and the interference spring can buffer each other due to the different accelerations.

[0092] In addition, the elastic coefficient of the force supply spring is set to 1.7N / mm, and the length is set to 100mm; the elastic coefficient of the interference spring is set to 5.3N / mm, and the length is set to 60mm. Compared with the traditional spring with an elastic coefficient of 1.68N / mm and a length of 160mm, under the condition of the same force provided to the nail shooting, the rebound acceleration of the spring assembly of this embodiment is significantly reduced by 20% compared with the traditional one, and the impact felt by the user during use is significantly reduced.

[0093] In addition, the rod seat contains a front buffer made of rubber, and the rear side contains a rear buffer made of rubber, so that when the spring assembly rebounds in the cylinder body, it will not directly act on the metal end cover and the rod seat of the cylinder body, thereby achieving secondary vibration reduction and reducing the vibration noise generated by the rebound, thereby reducing noise pollution.

[0094] The above embodiments are only used to illustrate specific implementation modes of the present invention, and the present invention is not limited to the description scope of the above embodiments.

[0095] In this embodiment, there are two spring assemblies, and a guide rod is provided in the cylinder. In other embodiments, the number of spring assemblies may also be one, in which case no guide rod is provided in the cylinder, and the inner cavity of the cylinder is in a shape matching the spring assembly, and the force supply spring and interference spring in the spring assembly are extended and retracted under the constraint of the inner wall of the cylinder. The number of spring assemblies may also be greater than two, and the number of spring assemblies corresponds to the number of guide rods, and all guide rods are centrally symmetrically distributed in the cylinder.

Claims

1. A separate power supply unit installed in a nail gun 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 nail-shooting; as well as at least one set of spring components, freely mounted between the rod seat and the rear side, having a supply spring abutting against the rod seat and an interference spring abutting against the rear side, Wherein, the force supply spring and the interference spring are combined with each other, The elastic coefficient of the force supply spring is smaller than the elastic coefficient of the interference spring, and the length of the force supply spring is greater than the length of the interference spring, The spring assembly is provided in a plurality of The cylinder body is provided with a plurality of guide rods, and the two ends of each guide rod are respectively fixed to the front side portion and the rear side portion. The rod seat is movably mounted on the plurality of guide rods. The plurality of spring assemblies are arranged in one-to-one correspondence with the plurality of guide rods. The force supply spring and the interference spring are sleeved on the corresponding guide rods. The spring assembly also has a connecting piece, The supply spring and the interference spring are coupled to each other via the connecting piece.

2. The separate power supply unit according to claim 1, characterized in that: in, The plurality of guide rods are centrally symmetrically arranged.

3. The separate power supply unit according to claim 1, characterized in that: in, The rod seat includes a front buffer member for buffering the vibration of the force supply spring. The rear side portion includes a rear buffer member for buffering the vibration of the interference spring.

4. The separate power supply unit according to any one of claims 1 to 3, characterized in that: in, The ratio of the elastic coefficient of the supply spring to the elastic coefficient of the interference spring is 1:10 to 1:

2. The ratio of the length of the force supply spring to the length of the interference spring is 5:2 to 5:

4.

5. The separate power supply unit according to claim 4, characterized in that: in, The elastic coefficient of the supply spring is 1.1N / mm to 2.1N / mm, and the elastic coefficient of the interference spring is 2.0N / mm to 8.5N / mm. The length of the force supply spring is 70 mm to 130 mm, and the length of the interference spring is 40 mm to 80 mm.

6. The separate power supply unit according to claim 1, characterized in that: in, The elastic coefficient of the supply spring is 1.5N / mm-1.7N / mm, and the elastic coefficient of the interference spring is 5.0N / mm-5.5N / mm. The length of the force supply spring is 98 mm to 102 mm, and the length of the interference spring is 58 mm to 62 mm.

7. A driving device installed in a nail gun for providing power for nail shooting, characterized in that: include: Separate power supply unit, used to provide power for nail shooting; as well as A driving unit, used to drive the separate power supply unit to generate the power, Wherein, the power supply unit is a separate power supply unit as described in any one of claims 1-6.

8. 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 7.

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