Driving device for driving firing pin to nail by using gas spring and nail gun

Abstract

The invention discloses a driving device for driving a firing pin to nail by using a gas spring and a nail gun, belongs to a nailing tool, and aims to solve the problems that the gas spring of the existing electric nail gun permanently seals gas, has hidden dangers, causes fatigue of a sealing structure and shortens the service life of the gas spring. The air pump is configured for the sealing cavity, when the electric nail gun is used, the air pump inflates the sealing cavity, when the nail gun is not used, compressed air in the air spring is released, and the defect caused by the fact that the air spring permanently seals the air can be overcome. The same motor provides power for the lifting wheel and the flywheel, the space for configuring the motor is saved, and the driving device is not too large in size. By means of the first one-way rotating mechanism and the second one-way rotating mechanism, when the first output end and the second output end of the motor output torsion outwards at the same time, one of the lifting wheel and the flywheel is driven, the other one is not driven, inflation and nailing work in different periods, and the load of the motor is reduced.

Description

Technical Field

[0001] The invention belongs to a nailing tool used for nailing nails into positions such as wooden boards and walls, and particularly relates to a driving device and a nail gun which utilize a gas spring to drive a striker to nail. Background Art

[0002] There are two types of nail guns on the market that are used to drive nails into wooden boards, walls, etc.: pneumatic nail guns and electric nail guns.

[0003] Pneumatic nail guns require an air compressor and a bulky gas tank. The pneumatic nail gun is connected to the gas tank through an air pipe. When nailing, the compressed air from the gas tank drives the piston to drive the firing pin to nail and reset. Each time a nail is driven, compressed air is consumed. Therefore, when the compressed air in the gas tank is reduced and the pressure is reduced, the air compressor needs to be started to inflate the gas tank. This type of pneumatic nail gun is inconvenient to move because it needs to be equipped with an air compressor and a gas tank, and the connected air pipe will cause hindrance during use.

[0004] The electric nail gun uses a gas spring as its power source. When nailing, the motor relies on electricity (such as a replaceable battery) to drive the lifting component, which lifts the firing pin and compresses the gas spring. The lifting component lifts the firing pin to a preset position and then releases the firing pin. The firing pin uses the elastic force of the gas spring to move and nail. The motor continues to rotate, and the firing pin will be lifted and nailed one by one. During nailing, the compressed air that constitutes the gas spring is not consumed, but only compressed and expanded.

[0005] In the prior art, a gas spring of an electric nail gun permanently seals a gas (such as an inert gas such as nitrogen). When the nail gun is not in operation (such as storage or transportation), the compressed gas in the gas spring still maintains a high pressure, which poses a hidden danger and may also cause fatigue of the sealing structure and shorten the life of the gas spring.

[0006] When the electric nail gun is in use, the sealed chamber is inflated, and when the nail gun is not in use (such as storage, transportation, etc.), the compressed gas in the gas spring is released, so that the defect caused by the gas spring permanently sealing the gas can be overcome. The electric nail gun with such a technical concept needs to be equipped with an air pump, which is driven by a motor. Therefore, the implementation of this electric nail gun needs to solve technical problems such as how to reasonably configure the structure so that the electric nail gun has a compact structure and is not too large in size, and further save manufacturing costs, and reasonably configure the product quality center for easy holding and use. Summary of the invention

[0007] The purpose of the present invention is to provide a driving device and a nail gun that utilizes a gas spring to drive a firing pin to nail, so as to overcome the defect caused by the gas spring of the existing electric nail gun permanently sealing the gas. Through reasonable structural configuration, the electric nail gun is given at least one of the following technical advantages: a compact structure, not too large in size, low manufacturing cost, and a reasonable configuration of the product quality center for easy holding and use.

[0008] In order to achieve the above-mentioned object, the driving device for driving a striker to nail by using a gas spring of the present invention comprises:

[0009] a motor having a first output terminal and a second output terminal;

[0010] a lifting wheel for lifting the firing pin and compressing the gas spring;

[0011] A first transmission device is arranged between the first output end of the motor and the lifting wheel, and the first transmission device includes a first one-way rotation mechanism. When the first output end rotates in one direction, the first output end drives the lifting wheel by means of the first transmission device, and when the first output end rotates in another direction, the first one-way rotation mechanism disengages the first output end from driving the lifting wheel;

[0012] a flywheel for driving an air pump;

[0013] A second transmission device is arranged between the second output end of the motor and the flywheel, the second transmission device includes a second one-way rotation mechanism, when the second output end rotates in one direction, the second output end drives the flywheel by means of the second transmission device, and when the second output end rotates in the other direction, the second one-way rotation mechanism disengages the second output end from driving the flywheel;

[0014] The first one-way rotation mechanism and the second one-way rotation mechanism are configured so that when the first output end and the second output end of the motor simultaneously output torque, one of the lifting wheel and the flywheel is driven and the other is disengaged from the drive.

[0015] The driving device uses the same motor to provide power for the lifting wheel and the flywheel. Compared with configuring one motor for both the lifting wheel and the flywheel, one motor can be saved, and the space for configuring the motor can be saved, so that the driving device will not be too large. The manufacturing cost of the product can also be saved. Since the nail gun is only inflated at the beginning of use, it does not need to be inflated again during the entire use process. The same motor provides power for the lifting wheel and the flywheel, which can give full play to the role of the motor. If one motor is configured for both the lifting wheel and the flywheel, the motor used to drive the flywheel will be idle for a long time, resulting in a waste of product structure resources.

[0016] The driving device, through the first one-way rotating mechanism and the second one-way rotating mechanism, when the first output end and the second output end of the motor output torque outward at the same time, one of the lifting wheel and the flywheel is driven and the other is disengaged from the drive, that is, when the lifting wheel is driven, the flywheel is not driven, and when the flywheel is driven, the lifting wheel is not driven, so that inflation and nailing work in different time periods, reducing the load of the motor.

[0017] In order to increase the force of the lifting wheel to lift the striker, the first transmission device includes a first reduction mechanism, thereby the torque of the first output end can be amplified on the lifting wheel.

[0018] In order to achieve a compact structure, the lifting wheel, the first reduction mechanism, the first one-way rotation mechanism and the first output end are coaxially arranged, thereby reducing the radial space occupied by these structures and preventing the product from being too large. In particular, the first reduction mechanism is a planetary gear mechanism coaxially arranged between the input end and the output end, and the first one-way rotation mechanism is a ratchet pawl mechanism.

[0019] The first unidirectional rotation mechanism includes a first ratchet and pawl mechanism, which is configured such that when the first output end rotates in one direction, the first ratchet and pawl mechanism engages for the first output end to drive the lifting wheel, and when the first output end rotates in the other direction, the first ratchet and pawl mechanism idles to disengage the first output end from driving the lifting wheel.

[0020] In order to improve the working efficiency of the nail gun, the firing pin is usually kept at a high position. The position of the firing pin can be detected by a position detector, and the motor is stopped when the firing pin reaches a preset high position. Accordingly, when the nailing is started after the sealed chamber is inflated to form a gas spring, the firing pin can be directly nailed without being lifted before nailing. To this end, the first one-way rotation mechanism includes a second ratchet pawl mechanism, the first ratchet pawl mechanism is adjacent to the first output end, the second ratchet pawl mechanism is adjacent to the lifting wheel, and the second ratchet pawl mechanism is configured to idle when the first output end drives the lifting wheel through the first transmission device, and to engage when the lifting wheel rotates in the reverse direction to prevent the lifting wheel from rotating in the reverse direction. Therefore, by engaging the second ratchet pawl mechanism, the firing pin can always be kept at a high position after the motor stops working, and the firing pin will not be caused to fall due to the elastic force of the gas spring.

[0021] In one embodiment, the first transmission device includes a first planetary gear mechanism, a second planetary gear mechanism, a first ratchet and pawl mechanism, and a third planetary gear mechanism that sequentially transmit from the first output end to the lifting wheel; the first ratchet and pawl mechanism is configured at the output end of the second planetary gear mechanism, and the second ratchet and pawl mechanism is configured at the output end of the third planetary gear mechanism. Accordingly, when the second output end of the motor works with the flywheel through the second transmission device, the first ratchet and pawl mechanism idles and does not cause the first output shaft to drive the lifting wheel, so that the third planetary gear mechanism and the second ratchet and pawl mechanism do not intervene in the work. When the motor is stopped, the second ratchet and pawl mechanism prevents the lifting wheel from rotating in accordance with the descent of the striker from being transmitted to the second planetary gear mechanism, so that the first planetary gear mechanism and the second planetary gear mechanism are not subjected to force. Accordingly, each planetary gear mechanism and ratchet and pawl mechanism of the first transmission device can be in a rest state without transmitting force, thereby avoiding fatigue.

[0022] Specifically,

[0023] The first planetary gear mechanism comprises a first input gear, a first planetary gear, a first output member and a first ring gear, the first ring gear is fixed, the first planetary gear is arranged on the first output member and meshes with the first input gear and the first ring gear, and the first input gear is arranged in a transmission manner with the first output end;

[0024] The second planetary gear mechanism includes a second input gear, a second planetary gear, a second output member and a second ring gear, the second ring gear is fixed, the second planetary gear is arranged on the second output member and meshes with the second input gear and the second ring gear, and the second input gear is arranged on the first output member;

[0025] The first ratchet pawl mechanism comprises a first ratchet sleeve and a first pawl, the first ratchet sleeve is rotatably arranged, the inner wall of the first ratchet sleeve is provided with a first one-way tooth groove, the first pawl is arranged on the second output member and leans against the inner wall of the first ratchet sleeve by a first spring;

[0026] The third planetary gear mechanism comprises a third input gear, a third planetary gear, a third output member and a third ring gear, the third ring gear is fixed, the third planetary gear is arranged on the third output member and meshes with the third input gear and the third ring gear, the third input gear is arranged on the first ratchet sleeve, and the third output member is assembled with the lifting wheel in a transmission manner;

[0027] The second ratchet pawl mechanism includes a second ratchet sleeve and a second pawl. The second ratchet sleeve is fixedly arranged. The inner wall of the second ratchet sleeve is provided with a second one-way tooth groove. The second pawl is arranged on the third output member and leans against the inner wall of the second ratchet sleeve by a second spring.

[0028] In another embodiment, the first transmission device includes a first ratchet pawl mechanism, a first planetary gear mechanism, a second planetary gear mechanism, and a third planetary gear mechanism that sequentially transmit transmission from the first output end to the lifting wheel, and the second ratchet pawl mechanism is disposed at the output end of the first planetary gear mechanism. Accordingly, when the second output end of the motor drives the flywheel to work through the second transmission device, the first ratchet pawl mechanism idles and does not cause the first output shaft to drive the lifting wheel, so that the first planetary gear mechanism, the second planetary gear mechanism, and the third planetary gear mechanism do not intervene in the work. When the motor is stopped, the second ratchet pawl mechanism prevents the rotation of the lifting wheel corresponding to the descent of the striker from being transmitted to the first planetary gear mechanism.

[0029] Specifically,

[0030] The first ratchet pawl mechanism comprises a first ratchet sleeve, a first rotating body and a first pawl, the first ratchet sleeve is rotatably arranged, the inner wall of the first ratchet sleeve is provided with a first one-way tooth groove, the first rotating body is arranged at the first output end, the first pawl is arranged on the first rotating body and leans against the inner wall of the first ratchet sleeve by a first spring;

[0031] The first planetary gear mechanism comprises a first input gear, a first planetary gear, a first output member and a first ring gear, wherein the first input gear is arranged on the first ratchet sleeve, the first ring gear is fixed, and the first planetary gear is arranged on the first output member and meshes with the first input gear and the first ring gear;

[0032] The second planetary gear mechanism includes a second input gear, a second planetary gear, a second output member and a second ring gear, wherein the second input gear is arranged on the first output member, the second ring gear is fixed, and the second planetary gear is arranged on the second output member and meshes with the second input gear and the second ring gear;

[0033] The second ratchet pawl mechanism comprises a second ratchet sleeve and a second pawl, the second ratchet sleeve is fixedly arranged, the second output member extends into the second ratchet sleeve and maintains a gap with the inner wall of the second ratchet sleeve, the gap gradually increases in one direction and gradually decreases in another direction, the second pawl is roller-shaped and is located in the gap, when the second output member rotates relative to the second ratchet sleeve in the direction in which the gap gradually decreases, the second pawl is freely located in the gap for the second output member to rotate in the direction, when the second output member rotates relative to the second ratchet sleeve in the direction in which the gap gradually increases, the second pawl is squeezed between the second output member and the inner wall of the second ratchet sleeve to achieve engagement and prevent the second output member from rotating in the direction;

[0034] The third planetary gear mechanism includes a third input gear, a third planetary gear, a third output member and a third ring gear. The third input gear is arranged on the second output member, the third ring gear is fixed, the third planetary gear is arranged on the third output member and meshes with the third input gear and the third ring gear, and the third output member is assembled with the lifting wheel transmission.

[0035] The first transmission device of the two embodiments described above embodies a flexible configuration of the planetary gear mechanism and the ratchet and pawl mechanism.

[0036] In order to increase the power of the flywheel inflation, the second transmission device includes a second reduction mechanism, whereby the torque of the second output end can be amplified on the flywheel, the axis of the flywheel is located below the axis of the second output end, and the inflation pump is located above the flywheel. This structure provides a more reasonable space for the movement of the connecting rod relative to the position of the motor. When these structures are arranged in the fuselage, the volume of this part of the fuselage will not be too large. Specifically, the second reduction mechanism is a heteroaxial gear transmission mechanism, and the second one-way rotation mechanism is a ratchet pawl mechanism.

[0037] In one embodiment, the second transmission device includes a non-axial gear transmission mechanism and a third ratchet and pawl mechanism that sequentially transmits transmission from the second output end to the flywheel, and the third ratchet and pawl mechanism is configured such that when the second output end rotates in one direction, the second output end drives the flywheel through the second transmission device, and when the second output end rotates in another direction, the third ratchet and pawl mechanism disengages the second output end from driving the flywheel. Specifically:

[0038] The off-axis gear transmission mechanism comprises a meshing driving gear and a driven gear, wherein the driving gear is arranged at the second output end and the driven gear is located below the driving gear;

[0039] The third ratchet and pawl mechanism includes a third ratchet sleeve, a third rotating body and a third pawl. The third ratchet sleeve is arranged on the driven gear. The inner wall of the third ratchet sleeve is provided with a third one-way tooth groove. The third rotating body is arranged on the flywheel. The third pawl is arranged on the third rotating body and relies on the inner wall of the third ratchet sleeve by a third spring.

[0040] In another embodiment, the second transmission device includes a third ratchet pawl mechanism and a non-axial gear transmission mechanism that sequentially transmits transmission from the second output end to the flywheel, and the third ratchet pawl mechanism is configured such that when the second output end rotates in one direction, the second output end drives the flywheel through the second transmission device, and when the second output end rotates in another direction, the third ratchet pawl mechanism disengages the second output end from driving the flywheel. Specifically:

[0041] The third ratchet pawl mechanism comprises a third rotating body, a third pawl and a third ratchet sleeve, wherein the third rotating body is arranged at the second output end, the third ratchet sleeve is arranged for rotation, a third one-way tooth groove is arranged on the inner wall of the third ratchet sleeve, the third pawl is arranged on the third rotating body and leans against the inner wall of the third ratchet sleeve by a third spring;

[0042] The off-axis gear transmission mechanism comprises a meshing driving gear and a driven gear, wherein the driving gear is arranged on the third ratchet sleeve, the driven gear is located below the driving gear, and the flywheel is coaxially arranged on the driven gear.

[0043] The second transmission device of the two embodiments described above embodies the flexible configuration of the ratchet and pawl mechanism and the off-axis gear transmission mechanism.

[0044] To achieve the above object, the nail gun of the present invention comprises:

[0045] The driving device of the present invention;

[0046] A cylinder, wherein a first piston is arranged in the cylinder, a striker extending downward is connected to the first piston, an upper side of the first piston is a sealing cavity, the sealing cavity is used to be filled with compressed air to form a gas spring, and the sealing cavity has an exhaust port;

[0047] An air pump, used for charging compressed air into the sealed chamber, comprises a second piston, the second piston is provided with a connecting rod, and the connecting rod is eccentrically connected to the flywheel;

[0048] A nail magazine, used for storing nails and conveying the stored nails to the lower end position of the striker;

[0049] The driving device, the cylinder, the air pump and the handle are integrated into a body, and the nail magazine is detachably arranged on the body.

[0050] The electric nail gun inflates the sealed cavity when in use, and releases the compressed gas in the gas spring when the nail gun is not in use (such as for storage, transportation, etc.), thereby overcoming the defect that the gas spring permanently seals the gas. The nail gun, by means of the driving device of the present invention, has a reasonably configured structure, a compact structure, and a low manufacturing cost.

[0051] In order to reasonably configure the mass center of the product, the handle extends from the side wall of the cylinder to the rear of the cylinder, the power supply is configured at the tail end of the handle, the drive device and the nail magazine are separated on both sides of the center plane of the handle and the cylinder, the lifting wheel and the striker are tangentially configured, and the air pump is located at the end of the drive device away from the lifting wheel. Based on this, the mass center of the product is located at the geometric center of the product as much as possible, so that the nail gun can be used in any posture by holding the handle, and the mass center will not be offset, which will increase the burden of holding when the nail gun posture changes.

[0052] In one embodiment, the nail gun further includes a controller, which is used to switch the direction of the motor. When the nail gun is first used, the motor is controlled to work in the second direction, so that the second output end first drives the flywheel so that the flywheel drives the air pump to charge compressed air into the sealed chamber to form a gas spring, and then the motor is controlled to work in the first direction, so that the first output end drives the lifting wheel so that the lifting wheel lifts the striker and the first piston and the first piston compresses the gas spring, and the first direction is opposite to the second direction; wherein, when the motor is controlled to work in the first direction, it is controlled by the nailing switch, and the lifting wheel releases the striker after lifting the striker to a predetermined position, and the gas spring applies force to the piston to push the striker to nail. Accordingly, when the nail gun is used, the nail gun can first charge the compressed air into the sealed chamber by the air pump to form a gas spring under the control of the controller, and then the motor is controlled to work in the first direction to drive the lifting wheel to nail.

[0053] In order to control the air pressure of the gas spring, the nail gun includes a pressure sensor for detecting the pressure of the sealing chamber or the air pump. The pressure sensor is connected to the controller so that the air pump fills the sealing chamber with compressed air to reach a set value, and then the controller switches the motor to work in the first direction. By adjusting the set air pressure of the gas spring to the required air pressure value, the force of the striker to nail can be adjusted to suit different types of nails.

[0054] In one embodiment, a switch is provided on the fuselage to control the motor to work in the first direction or the second direction. The user can switch the motor to work in the first direction for nailing or in the second direction for inflation through the switch.

[0055] In order to control the air pressure of the gas spring, the nail gun includes a pressure gauge for detecting the pressure of the sealed chamber or the air pump. The pressure of the gas spring is read by the pressure gauge. When the pressure of the gas spring is too high or too low, the gas pressure of the gas spring can be maintained at a reasonable pressure value by deflating or inflating.

[0056] The present invention uses the same motor to provide power for the lifting wheel and the flywheel, which can save one motor and save space for configuring the motor, thereby reducing the size of the drive device and saving the manufacturing cost of the product.

[0057] The present invention uses the first unidirectional rotating mechanism and the second unidirectional rotating mechanism, when the first output end and the second output end of the motor simultaneously output torque, one of the lifting wheel and the flywheel is driven and the other is disengaged from the drive, that is, when the lifting wheel is driven, the flywheel is not driven, and when the flywheel is driven, the lifting wheel is not driven, so that inflation and nailing work in different time periods, reducing the load of the motor.

[0058] The present invention configures an exhaust port for forming a sealed cavity of a gas spring, and configures an air pump for the sealed cavity. When an electric nail gun is used, the air pump inflates the sealed cavity. When the nail gun is not in use (such as for storage or transportation), the compressed gas in the gas spring is released, thereby overcoming the defect caused by the gas spring permanently sealing the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 It is an isometric view of the nail gun of Example 1 of the present invention;

[0060] Figure 2 It is a schematic cross-sectional structure diagram of a nail gun according to Embodiment 1 of the present invention;

[0061] Figure 3 for Figure 2 AA section view, in which the firing pin is lifted to the highest position by the lifting wheel;

[0062] Figure 4 for Figure 3 A schematic diagram of the lifting wheel in the figure releasing the firing pin so that the firing pin descends from the highest position to drive the nail;

[0063] Figure 5 for Figure 4 Schematic diagram of the firing pin in the embodiment of FIG. 1 descending to the lowest position to drive a nail;

[0064] Figure 6 This is a schematic diagram of the assembly structure of the driving device, air pump and air cylinder of Example 1 of the present invention;

[0065] Figure 7 This is a schematic diagram of the driving device of Example 1 of the present invention driving the air pump and the striker;

[0066] Figure 8 for Figure 7 A schematic diagram of the exploded structure of the air pump and part of the driving device in the structure shown;

[0067] Fig. 9 for Figure 7A schematic diagram of the exploded structure of a portion of the drive device in the structure shown;

[0068] Fig.10 for Figure 8 a schematic diagram of another view of the structure shown;

[0069] Fig.11 for Fig. 9 a schematic diagram of another view of the structure shown;

[0070] Fig.12 This is a schematic diagram of the assembly structure of the driving device, air pump and air cylinder of Example 2 of the present invention;

[0071] Fig.13 This is a schematic diagram of a driving device driving an air pump and a striker according to Embodiment 2 of the present invention;

[0072] Fig.14 for Fig.13 A schematic diagram of the exploded structure of the air pump and part of the driving device in the structure shown;

[0073] Fig.15 for Fig.13 A schematic diagram of the exploded structure of a portion of the drive device in the structure shown;

[0074] Fig.16 for Fig.14 a schematic diagram of another view of the structure shown;

[0075] Fig.17 for Fig.15 a schematic diagram of another view of the structure shown;

[0076] Fig.18 is a cross-sectional schematic diagram of the second ratchet and pawl mechanism in the meshing state in Embodiment 2 of the present invention;

[0077] Fig.19 is a cross-sectional schematic diagram of the second ratchet and pawl mechanism in embodiment 2 of the present invention in an idling state;

[0078] Description of the numbers in the figure:

[0079] 10. Driving device;

[0080] 20 cylinder: 21 first piston, 22 striker, 23 sealing chamber, 24 exhaust port, 25 pressure gauge, 26 teeth;

[0081] 30 air pump: 31 second piston, 32 connecting rod, 33 air charging tube;

[0082] 40 nail magazine, 41 nails, 42 gun muzzle;

[0083] 50 handle, 51 power supply, 52 nailing switch;

[0084] 100 motor, 101 first output end, 102 second output end;

[0085] 200 lifting wheel, 201 missing part, 202 pin;

[0086] 300 First Transmission:

[0087] 310 first ratchet and pawl mechanism: 311 first ratchet sleeve, 312 first pawl, 313 first one-way tooth groove, 314 first spring, 315 first rotating body,

[0088] 320 second ratchet pawl mechanism: 321 second ratchet sleeve, 322 second pawl, 323 second one-way tooth groove, 324 second spring, 325 gap,

[0089] 330 first planetary gear mechanism: 331 first input gear, 332 first planetary gear, 333 first output member, 334 first ring gear,

[0090] 340 second planetary gear mechanism: 341 second input gear, 342 second planetary gear, 343 second output member, 344 second ring gear,

[0091] 350 third planetary gear mechanism: 351 third input gear, 352 third planetary gear, 353 third output member, 354 third ring gear,

[0092] 400 flywheel;

[0093] 500 Second Transmission:

[0094] 510 off-axis gear transmission mechanism: 511 driving gear, 512 driven gear;

[0095] 520 third ratchet and pawl mechanism: 521 third ratchet sleeve, 522 third rotating body, 523 third pawl, 524 third one-way tooth groove, 525 third spring. DETAILED DESCRIPTION

[0096] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0097] The terms "including" and "having" and any variations thereof in the specification and claims of the present invention are intended to cover non-exclusive inclusions. For example, a method or product comprising a series of technical features is not necessarily limited to those technical features clearly listed, but may also include other technical features that are not clearly listed and can be included in the method or product.

[0098] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "front", "back", "forward", "reverse" and the like indicate positions, positional relationships and directions based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. Among them, "up" and "down", "left" and "right", "front" and "back", "forward" and "reverse" are opposite directions.

[0099] In the description of the present invention, it is necessary to understand that the technical features defined by the terms "first", "second", "third" and the like with sequential concepts are only for the purpose of clearly describing the defined technical features so that the defined technical features can be clearly distinguished from other technical features, but do not represent such naming in actual implementation, and therefore cannot be understood as a limitation of the present invention.

[0100] The present invention is described in detail below in conjunction with specific embodiments and accompanying drawings.

[0101] Example 1

[0102] like Figure 1-5 As shown, the electric nail gun includes a driving device 10 , a cylinder 20 , an air pump 30 , a handle 50 , and a nail magazine 40 .

[0103] A first piston 21 is disposed in the cylinder 20, and a striker 22 extending downward is connected to the first piston 21. The upper side of the first piston 21 is a sealing chamber 23, and the sealing chamber is used to fill compressed air to form a gas spring. The sealing chamber has an exhaust port 24, and the exhaust port is used to exhaust the compressed air in the sealing chamber.

[0104] The air pump 30 is used to charge compressed air into the sealed cavity 23, and includes a second piston 31, the second piston 31 is provided with a connecting rod 32, and the connecting rod 32 is eccentrically connected to the flywheel 400. When the air pump is working, the sealed cavity is charged through the charging pipe 33.

[0105] The nail magazine 40 is used to store nails 41 and transport the stored nails to the gun nozzle 42 at the lower end position of the firing pin.

[0106] The driving device 10 provides power for the electric nail gun, is used to drive the flywheel 400 to rotate to inflate the sealed cavity of the cylinder with the air pump to form a gas spring, and is also used to drive the lifting wheel 200 to lift the striker and compress the gas spring.

[0107] The driving device 10 , the air cylinder 20 , the air pump 30 and the handle 50 are integrated into a body, and the nail magazine 40 is detachably arranged on the body.

[0108] In particular, the handle 50 extends from the side wall of the cylinder 20 to the rear of the cylinder. The tail end of the handle is equipped with a power supply 51, which is rechargeable and replaceable. The drive device 10 and the nail magazine 40 are located on the left and right sides of the center plane of the handle and the cylinder. The lifting wheel 200 and the striker 22 are tangentially arranged, similar to the meshing of a gear and a rack. The air pump 30 is located at the end of the drive device 10 away from the lifting wheel 200.

[0109] In this embodiment, the nail gun further includes a controller not shown in the figure, and the controller is used to switch the direction of the motor. When the nail gun is first used, the motor is controlled to work in the second direction (counterclockwise), so that the second output end first drives the flywheel so that the flywheel drives the air pump to fill the sealed cavity with compressed air to form a gas spring, and then the motor is controlled to work in the first direction (clockwise), so that the first output end drives the lifting wheel so that the lifting wheel lifts the striker and the first piston and the first piston compresses the gas spring. The first direction of rotation is opposite to the second direction of rotation. Among them, when the motor is controlled to work in the first direction of rotation, it is controlled by the nailing switch 52, that is, only when the nailing switch is operated (such as pulling or pressing), the motor can work in the first direction of rotation. In addition, the lifting wheel releases the striker after lifting it to a predetermined position, and the gas spring applies force to the piston to push the striker to nail.

[0110] In the figure, the lifting wheel 200 has a missing part 201, and there are a number of pins 202 distributed along the circumference of the lifting wheel, while the missing part has no pins. The side of the striker has a row of teeth 26, and the number of teeth 26 corresponds to the number of pins 202. When the lifting wheel rotates in the forward direction, the pins and teeth mesh one by one, just like the meshing of a gear and a rack, lifting the striker, and at the same time, the gas spring is compressed by the first piston until the striker 22 is as Figure 3 As the lifting wheel rotates, the lifting wheel turns to Figure 4 The missing part 201 shown corresponds to the striker 22. Since there is no pin to mesh with the tooth, the lifting wheel releases the striker, and the striker and the first piston quickly drop from the highest position to the lower position under the action of the gas spring. Figure 5 The lifting wheel continues to rotate, and after the missing part passes the firing pin, the firing pin is lifted again. As the lifting wheel rotates, the firing pin reciprocates up and down, and the nails are driven again and again.

[0111] In this embodiment, the nail gun includes a pressure sensor for detecting the pressure of the sealed chamber or the air pump, and the pressure sensor is connected to the controller so that the air pump fills the sealed chamber with compressed air to reach a set value, and the controller switches the motor to work in the first direction. The set value of the compressed air filled into the sealed chamber is set by the controller.

[0112] In this embodiment, the driving device uses a motor 100 to provide power for the lifting wheel 200 and the flywheel 400. Through the first one-way rotation mechanism and the second one-way rotation mechanism, when the first output end 101 and the second output end 102 of the motor simultaneously output torque to the outside, one of the lifting wheel and the flywheel is driven and the other is disengaged from the drive, that is, when the lifting wheel is driven, the flywheel is not driven, and when the flywheel is driven, the lifting wheel is not driven.

[0113] Therefore, if Figure 6-11 As shown, the driving device 10 of this embodiment includes a motor 100 , a lifting wheel 200 , a first transmission device 300 , a flywheel 400 , and a second transmission device 500 .

[0114] The motor 100 has a first output terminal 101 and a second output terminal 102. In this embodiment, the first output terminal and the second output terminal have the same direction of rotation. As described below, since the connecting rod is eccentrically connected to the flywheel, the flywheel drives the air pump to inflate the sealed cavity when it rotates. Therefore, the driving of the air pump does not need to limit the direction of rotation of the flywheel and the second output terminal.

[0115] The lifting wheel 200 is used to lift the striker 22 and compress the gas spring as previously described.

[0116] The first transmission device 300 is arranged between the first output end 101 of the motor and the lifting wheel 200. The first transmission device includes a first unidirectional rotation mechanism. When the first output end rotates in one direction, the first output end drives the lifting wheel by means of the first transmission device. When the first output end rotates in the other direction, the first unidirectional rotation mechanism disengages the first output end from driving the lifting wheel.

[0117] The flywheel 400 is used to drive the air pump 30 as described above.

[0118] The second transmission device 500 is arranged between the second output end 102 of the motor and the flywheel 400. The second transmission device includes a second one-way rotation mechanism. When the second output end rotates in one direction, the second output end drives the flywheel by means of the second transmission device. When the second output end rotates in the other direction, the second one-way rotation mechanism disengages the second output end from driving the flywheel.

[0119] The first one-way rotation mechanism and the second one-way rotation mechanism are configured so that when the first output end and the second output end of the motor simultaneously output torque, one of the lifting wheel and the flywheel is driven and the other is disengaged from the drive.

[0120] In this embodiment, the first transmission device includes a first reduction mechanism. The lifting wheel 200 , the first reduction mechanism, the first one-way rotation mechanism and the first output end 101 are coaxially arranged.

[0121] The first reduction mechanism is a planetary gear mechanism with an input end and an output end coaxially arranged, and includes a first planetary gear mechanism 330 , a second planetary gear mechanism 340 and a third planetary gear mechanism 350 .

[0122] The first one-way rotating mechanism is a ratchet pawl mechanism. The first one-way rotating mechanism includes a first ratchet pawl mechanism 310 and a second ratchet pawl mechanism 320. Moreover, the first ratchet pawl mechanism 310 is adjacent to the first output end 101, and the second ratchet pawl mechanism 320 is adjacent to the lifting wheel 200. The first ratchet pawl mechanism is configured such that when the first output end rotates in one direction, the first ratchet pawl mechanism engages for the first output end to drive the lifting wheel, and when the first output end rotates in another direction, the first ratchet pawl mechanism idles to disengage the first output end from driving the lifting wheel, and the second ratchet pawl mechanism is configured such that when the first output end drives the lifting wheel through the first transmission device, the lifting wheel idles, and when the lifting wheel rotates in the reverse direction, the lifting wheel engages to prevent the lifting wheel from rotating in the reverse direction. In this way, the lifting wheel and the flywheel rotate in different time periods instead of at the same time, so as to realize inflation and nailing respectively.

[0123] Specifically, the first transmission device includes a first planetary gear mechanism 330, a second planetary gear mechanism 340, a first ratchet and pawl mechanism 310 and a third planetary gear mechanism 350 which transmit in sequence from the first output end to the lifting wheel; the first ratchet and pawl mechanism 310 is configured at the output end of the second planetary gear mechanism 340, and the second ratchet and pawl mechanism 320 is configured at the output end of the third planetary gear mechanism 350.

[0124] The first planetary gear mechanism 330 includes a first input gear 331, a first planetary gear 332, a first output member 333 and a first gear ring 334. The first gear ring is fixed to the housing outside the first planetary gear. The first planetary gear is swingably arranged on the first output member through a pin and meshes with the first input gear and the first gear ring. The first output member is equivalent to the planet carrier of the first planetary gear. The first input gear and the first output end are assembled by a key to realize a transmission configuration. Accordingly, the rotation of the first output end 101 can be transmitted to the first output member 333 in the same direction at a reduced speed.

[0125] The second planetary gear mechanism 340 includes a second input gear 341, a second planetary gear 342, a second output member 343, and a second gear ring 344. The second gear ring is fixed to the housing outside the second planetary gear. The second planetary gear is swingably arranged on the second output member through a pin and meshes with the second input gear and the second gear ring. The second output member is equivalent to the planet carrier of the second planetary gear. The second input gear 341 is integrally arranged on the first output member 333. Accordingly, the rotation of the first output member 333 can be transmitted to the second output member 343 in the same direction at a reduced speed.

[0126] The first ratchet pawl mechanism 310 includes a first ratchet sleeve 311 and a first pawl 312. The first ratchet sleeve is rotatably arranged. The inner wall of the first ratchet sleeve is provided with a first one-way tooth groove 313. The first pawl is arranged on the second output member via a pin shaft and leans against the inner wall of the first ratchet sleeve by means of a first spring 314. In the figure, according to the direction of the first one-way tooth groove 313, when the second output member 343 rotates in the first direction (clockwise), the first pawl is engaged with the first one-way tooth groove, and the first pawl pushes the first ratchet sleeve to rotate in the first direction (clockwise). When the second output member 343 rotates in the second direction (counterclockwise), the first pawl slides on the inner wall of the first ratchet sleeve, the first ratchet pawl mechanism idles, and the first ratchet sleeve is stationary and does not transmit rotation.

[0127] The third planetary gear mechanism 350 includes a third input gear 351, a third planetary gear 352, a third output member 353 and a third gear ring 354. The third gear ring is fixed to the housing outside the third planetary gear. The third planetary gear is swingably arranged on the third output member through a pin and meshes with the third input gear and the third gear ring. The third output member is equivalent to the planet carrier of the third planetary gear. The third input gear 351 is integrally arranged on the first ratchet sleeve 311. The third output member 353 is assembled with the lifting wheel 200 through a spline transmission. Accordingly, the rotation of the first ratchet sleeve 311 in the first direction (clockwise) can be transmitted to the third output member 353 in the same direction at a reduced speed, and the third output member 353 drives the lifting wheel 200 to rotate in the first direction (clockwise).

[0128] The second ratchet pawl mechanism 320 includes a second ratchet sleeve 321 and a second pawl 322. The second ratchet sleeve is fixed to the housing outside thereof. The inner wall of the second ratchet sleeve is provided with a second one-way tooth groove 323. The second pawl is disposed on the third output member 353 via a pin shaft and leans against the inner wall of the second ratchet sleeve by means of a second spring 324. In the figure, according to the direction of the second one-way tooth groove 323, when the third output member 353 rotates in the first direction (clockwise), the second pawl 322 slides on the inner wall of the second ratchet sleeve, the second ratchet pawl mechanism idles, and the third output member rotates with the lifting wheel to lift the striker. When the motor stops working, the striker is lifted to the highest position as mentioned above. At this time, the striker has a downward tendency due to the action of the gas spring and prompts the lifting wheel to generate a second rotation trend (counterclockwise). This rotation trend is transmitted to the third output member 353, which prompts the second pawl 322 to engage with the second one-way tooth groove 323 to prevent this rotation, thereby preventing the striker from falling and keeping the striker in a high position.

[0129] In this embodiment, the second transmission device includes a second reduction mechanism, the axis of the flywheel is located below the axis of the second output end, and the air pump is located above the flywheel. Moreover, the second reduction mechanism is a non-axial gear transmission mechanism, and the second one-way rotation mechanism is a ratchet and pawl mechanism. Specifically, the second transmission device 500 includes a non-axial gear transmission mechanism 510 and a third ratchet and pawl mechanism 520 that sequentially transmit from the second output end 102 to the flywheel 400, and the third ratchet and pawl mechanism is configured such that when the second output end rotates in one direction, the second output end drives the flywheel through the second transmission device, and when the second output end rotates in another direction, the third ratchet and pawl mechanism disengages the second output end from driving the flywheel.

[0130] The off-axis gear transmission mechanism 510 includes a meshing driving gear 511 and a driven gear 512 . The driving gear 511 is configured at the second output end 102 through a key, and the driven gear 512 is located below the driving gear 511 .

[0131] The third ratchet pawl mechanism 520 includes a third ratchet sleeve 521, a third rotating body 522 and a third pawl 523. The third ratchet sleeve 521 is integrally arranged at the rear end of the driven gear 512. The inner wall of the third ratchet sleeve is provided with a third one-way tooth groove 524. The third rotating body 522 is arranged at the front end of the flywheel 400. The third pawl 523 is swingably arranged on the third rotating body 522 through a pin and leans on the inner wall of the third ratchet sleeve by a third spring 525. In the figure, according to the direction of the third one-way tooth groove 524, when the second output end 102 rotates with the first output end 101 in the first direction (clockwise), the driven gear 511 rotates counterclockwise, the inner wall of the third ratchet sleeve 521 slides with the third pawl 523, the third ratchet pawl mechanism 520 idles, the second output end does not drive the flywheel, and the air pump does not work. On the contrary, when the second output end rotates together with the first output end in the second direction (counterclockwise), the driven gear 512 rotates clockwise, the third one-way tooth groove 524 on the inner wall of the third ratchet sleeve 521 pushes the third pawl 523 to rotate counterclockwise, the third ratchet and pawl mechanism 520 is in a meshing state, the third rotating body and the flywheel rotate together, the second output end drives the flywheel, and drives the air pump to work.

[0132] Example 2

[0133] This embodiment has the same function as the embodiment 1, and has the following three differences in structure: first, the way of switching the motor direction is different, second, the pressure control method of the gas spring is different, and third, the structure of the driving device is different. The rest of the structure is the same as the embodiment 1. The differences are explained below, and the similarities are not repeated.

[0134] First, in this embodiment, the fuselage is equipped with a switch for controlling the motor to work in the first direction or the second direction, thereby replacing the automatic control of the controller in the embodiment.

[0135] Secondly, the nail gun includes a pressure gauge 25 for detecting the pressure of the sealed chamber or the air pump, which is convenient for checking the air pressure when the sealed chamber is inflated and during use.

[0136] Third, the driving device in this embodiment is different from that in Embodiment 1 in terms of the first transmission device and the second transmission device.

[0137] The first transmission device includes a first ratchet and pawl mechanism 310 , a first planetary gear mechanism 330 , a second planetary gear mechanism 340 , and a third planetary gear mechanism 350 that sequentially transmits power from the first output end to the lifting wheel. The second ratchet and pawl mechanism 320 is disposed at the output end of the first planetary gear mechanism 330 .

[0138] The first ratchet pawl mechanism includes a first ratchet sleeve 311, a first rotating body 315 and a first pawl 312. The first ratchet sleeve is rotatably configured, and the inner wall of the first ratchet sleeve is provided with a first one-way tooth groove 313. The first rotating body 315 is configured at the first output end 101 through a key, and the first pawl 312 is swingably configured at the first rotating body 315 through a pin and relies on the inner wall of the first ratchet sleeve by means of a first spring 314. In the figure, according to the direction of the first one-way tooth groove, when the first output end rotates in the first direction (clockwise), the first rotating body rotates accordingly, the first pawl is engaged with the first one-way tooth groove, and the first pawl pushes the first ratchet sleeve to rotate in the first direction (clockwise). When the first output end rotates in the second direction (counterclockwise), the first rotating body rotates accordingly, the first pawl slides on the inner wall of the first ratchet sleeve, the first ratchet pawl mechanism idles, and the first ratchet sleeve is stationary and does not transmit rotation.

[0139] The first planetary gear mechanism 330 includes a first input gear 331, a first planetary gear 332, a first output member 333 and a first gear ring 334. The first input gear 331 is integrally configured on the first ratchet sleeve 311, the first gear ring is fixed to the housing outside the first input gear 331, the first planetary gear is configured on the first output member through a pin and meshes with the first input gear and the first gear ring, and the first output member is equivalent to the planet carrier of the first planetary gear. Therefore, the first input gear 331 can be transmitted to the first output member 333 in the same direction as the first ratchet sleeve 311 rotates.

[0140] The second planetary gear mechanism 340 includes a second input gear 341, a second planetary gear 342, a second output member 343, and a second gear ring 344. The second input gear 341 is integrally configured with the first output member 333, the second gear ring is fixed to the housing on its side, the second planetary gear is configured with the second output member through a pin shaft and meshes with the second input gear and the second gear ring, and the second output member is equivalent to the planet carrier of the second planetary gear. Accordingly, the second input gear 341 can be transmitted to the second output member 343 in the same direction as the rotation of the first output member 333.

[0141] The second ratchet pawl mechanism 320 includes a second ratchet sleeve 321 and a second pawl 322. The second ratchet sleeve is fixedly arranged on the outer side of the housing. The second output member 343 extends into the second ratchet sleeve 321 and maintains a gap 325 between the inner wall of the second ratchet sleeve. The gap gradually increases in one direction and gradually decreases in the other direction. The second pawl 322 is roller-shaped and is located in the gap. Fig.18 As shown, when the second output member 343 rotates relative to the second ratchet sleeve 321 in the direction where the gap gradually becomes smaller (first turning direction, clockwise direction), the second pawl 322 is located at the end where the gap gradually increases and is freely located in the gap for the second output member to rotate in this direction. Fig.19As shown, when the second output member rotates relative to the second ratchet sleeve in the direction where the gap gradually increases (the second turn, counterclockwise), the second pawl 322 is squeezed between the second output member 343 and the inner wall of the second ratchet sleeve 321 to achieve engagement and prevent the second output member from rotating in this direction. When the motor stops working, as mentioned above, the striker is lifted to the highest position. At this time, the striker has a downward trend under the action of the gas spring and prompts the lifting wheel to generate a second turn (counterclockwise) rotation trend. This rotation trend is transmitted to the second output member, and the second ratchet pawl mechanism presents Fig.19 The state shown prevents this rotation, thereby preventing the striker from descending and holding the striker in a high position.

[0142] The third planetary gear mechanism 350 includes a third input gear 351, a third planetary gear 352, a third output member 353 and a third gear ring 354. The third input gear 351 is integrally configured on the second output member 343, the third gear ring is fixed to the housing outside the third input gear 351, the third planetary gear is configured on the third output member through a pin shaft and meshes with the third input gear and the third gear ring, the third output member is equivalent to the planet carrier of the third planetary gear, and the third output member 353 is assembled with the lifting wheel 200 through a spline transmission. Accordingly, the third input gear 351 can be transmitted to the third output member in the same direction with the rotation of the second output member 343 in the first direction (clockwise), and the third output member drives the lifting wheel to rotate in the first direction (clockwise) to lift the striker.

[0143] In this embodiment, the second transmission device 500 includes a third ratchet and pawl mechanism 520 and a non-axial gear transmission mechanism 510 that transmits power from the second output end to the flywheel in sequence. The third ratchet and pawl mechanism is configured so that when the second output end rotates in one direction, the second output end drives the flywheel through the second transmission device, and when the second output end rotates in another direction, the third ratchet and pawl mechanism disengages the drive of the flywheel from the second output end.

[0144] The third ratchet pawl mechanism 520 includes a third rotating body 522, a third pawl 523 and a third ratchet sleeve 521. The third rotating body 522 is configured at the second output end 102 through a key, the third ratchet sleeve is rotatably configured, and the inner wall of the third ratchet sleeve is provided with a third one-way tooth groove 524. The third pawl is swingably configured at the third rotating body through a pin and relies on the inner wall of the third ratchet sleeve by a third spring 525. In the figure, according to the direction of the third one-way tooth groove, when the second output end 102 rotates with the first output end 101 in the first direction (clockwise), the third rotating body rotates with the second output end, the third pawl slides on the inner wall of the third ratchet sleeve, the third ratchet sleeve remains stationary and does not rotate, and the third ratchet pawl mechanism is idle. On the contrary, when the second output end rotates with the first output end in the second direction (counterclockwise), the third pawl is engaged with the third one-way tooth groove, and the third pawl pushes the third ratchet sleeve to rotate in the second direction (counterclockwise).

[0145] The off-axis gear transmission mechanism 510 includes a meshing driving gear 511 and a driven gear 512, wherein the driving gear 511 is integrally arranged on the third ratchet sleeve 521, the driven gear is located below the driving gear, and the flywheel is coaxially arranged on the driven gear. Accordingly, when the second output end rotates with the first output end in the first direction (clockwise), the second output end does not drive the flywheel, and the air pump does not work. When the second output end rotates with the first output end in the second direction (counterclockwise), the driving gear rotates with the third ratchet sleeve, and the driven gear rotates with the driving gear, thereby driving the flywheel to rotate together, and the flywheel drives the air pump to inflate the sealing ring.

[0146] The nail guns of the above embodiments 1 and 2, according to their first transmission device and the second transmission device, when the first output end and the second output end of the motor rotate in the first direction (clockwise), the first output end drives the lifting wheel to rotate through the first transmission device to lift the striker, the second transmission device disconnects the second output end from the transmission of the flywheel, and the air pump does not work. When the first output end and the second output end of the motor rotate in the second direction (counterclockwise), the second output end drives the flywheel to rotate through the second transmission device to drive the air pump to work, the first transmission device disconnects the first output end from the transmission of the lifting wheel, and the striker is not lifted. This realizes that one motor is used to drive the lifting wheel and to lift the flywheel without interfering with each other.

[0147] In the above embodiments 1 and 2, when using the nail gun, the motor is first rotated counterclockwise to drive the air pump to inflate the sealed cavity, and then the motor is switched to a mode of rotating in the clockwise direction, and the motor is started to nail by flipping the nailing switch. The switching and control of the motor direction can be automatically controlled by the controller, or realized by a manual operation button or knob configured on the body. When the nail gun is not in use, the compressed air in the sealed cavity is discharged through the exhaust port.

[0148] In the above embodiments, the transmission relationship between the first transmission device and the second transmission device is described in detail. However, in actual implementation, the corresponding rotating parts need bearing support. In order to keep the pawl and the planetary gear in their assembly position, the pawl and the planetary gear can be covered and constrained in their assembly position by a baffle. A rotating sleeve is placed between adjacent relatively rotatable ratchet pawl mechanisms and planetary gear mechanisms to increase wear resistance.

Claims

1. A driving device for driving a striker to nail using a gas spring, characterized in that include: A motor (100) having a first output terminal (101) and a second output terminal (102); A lifting wheel (200) for lifting the striker (22) and compressing the gas spring; A first transmission device (300) is arranged between the first output end (101) of the motor and the lifting wheel (200), the first transmission device comprising a first one-way rotation mechanism, when the first output end rotates in one direction, the first output end drives the lifting wheel by means of the first transmission device, and when the first output end rotates in the other direction, the first one-way rotation mechanism disengages the first output end from driving the lifting wheel; A flywheel (400) for driving an air pump (30); A second transmission device (500) is arranged between the second output end (102) of the motor and the flywheel (400), the second transmission device comprising a second one-way rotation mechanism, when the second output end rotates in one direction, the second output end drives the flywheel via the second transmission device, and when the second output end rotates in the other direction, the second one-way rotation mechanism disengages the second output end from driving the flywheel; The first one-way rotation mechanism and the second one-way rotation mechanism are configured so that when the first output end and the second output end of the motor simultaneously output torque, one of the lifting wheel and the flywheel is driven and the other is disengaged from the drive.

2. The driving device for driving a nail by using a gas spring according to claim 1, characterized in that: The first transmission device includes a first reduction mechanism.

3. The driving device for driving a nail by using a gas spring according to claim 2, characterized in that: The lifting wheel (200), the first speed reduction mechanism, the first one-way rotation mechanism and the first output end (101) are coaxially arranged.

4. The driving device for driving a nail by using a gas spring according to claim 3 is characterized in that: The first speed reduction mechanism is a planetary gear mechanism with an input end and an output end coaxially arranged, and the first one-way rotation mechanism is a ratchet and pawl mechanism.

5. The driving device for driving a nail by using a gas spring according to claim 4, characterized in that: The first one-way rotation mechanism comprises a first ratchet pawl mechanism (310), wherein the first ratchet pawl mechanism is configured such that when the first output end rotates in one direction, the first ratchet pawl mechanism is engaged for the first output end to drive the lifting wheel, and when the first output end rotates in another direction, the first ratchet pawl mechanism is idle to disengage the first output end from driving the lifting wheel.

6. The driving device for driving a nail by using a gas spring according to claim 5, characterized in that: The first one-way rotation mechanism comprises a second ratchet pawl mechanism (320), the first ratchet pawl mechanism is adjacent to the first output end, the second ratchet pawl mechanism is adjacent to the lifting wheel, and the second ratchet pawl mechanism is configured to idle when the first output end drives the lifting wheel through the first transmission device, and to engage when the lifting wheel rotates in the reverse direction to prevent the lifting wheel from rotating in the reverse direction.

7. The driving device for driving a nail by using a gas spring according to claim 6, characterized in that: The first transmission device (300) comprises a first planetary gear mechanism (330), a second planetary gear mechanism (340), a first ratchet and pawl mechanism (310) and a third planetary gear mechanism (350) which sequentially transmit power from the first output end to the lifting wheel; the first ratchet and pawl mechanism (310) is arranged at the output end of the second planetary gear mechanism (340), and the second ratchet and pawl mechanism (320) is arranged at the output end of the third planetary gear mechanism (350).

8. The driving device for driving a nail by using a gas spring according to claim 7, characterized in that: The first planetary gear mechanism (330) comprises a first input gear (331), a first planetary gear (332), a first output member (333) and a first ring gear (334), wherein the first ring gear is fixed, the first planetary gear is arranged on the first output member and meshes with the first input gear and the first ring gear, and the first input gear (331) is arranged in a transmission manner with the first output end (101); The second planetary gear mechanism (340) comprises a second input gear (341), a second planetary gear (342), a second output member (343) and a second ring gear (344), wherein the second ring gear is fixed, the second planetary gear is arranged on the second output member and meshes with the second input gear and the second ring gear, and the second input gear (341) is arranged on the first output member (333); The first ratchet pawl mechanism (310) comprises a first ratchet sleeve (311) and a first pawl (312), the first ratchet sleeve is rotatably arranged, the inner wall of the first ratchet sleeve is provided with a first one-way tooth groove (313), the first pawl is arranged on the second output member and relies on the inner wall of the first ratchet sleeve by means of a first spring (314); The third planetary gear mechanism (350) comprises a third input gear (351), a third planetary gear (352), a third output member (353) and a third gear ring (354); the third gear ring is fixed; the third planetary gear is arranged on the third output member and meshes with the third input gear and the third gear ring; the third input gear (351) is arranged on the first ratchet sleeve (311); and the third output member (353) is transmission-assembled with the lifting wheel (200); The second ratchet pawl mechanism (320) comprises a second ratchet sleeve (321) and a second pawl (322). The second ratchet sleeve is fixedly arranged. The inner wall of the second ratchet sleeve is provided with a second one-way tooth groove (323). The second pawl is arranged on the third output member and relies on the inner wall of the second ratchet sleeve by a second spring (324).

9. The driving device for driving a nail by using a gas spring according to claim 6, characterized in that: The first transmission device (300) comprises a first ratchet and pawl mechanism (310), a first planetary gear mechanism (330), a second planetary gear mechanism (340), and a third planetary gear mechanism (350) which sequentially transmit the transmission from the first output end to the lifting wheel, and the second ratchet and pawl mechanism (320) is arranged at the output end of the first planetary gear mechanism (330).

10. The driving device for driving a nail by using a gas spring according to claim 9, characterized in that: The first ratchet pawl mechanism (310) comprises a first ratchet sleeve (311), a first rotating body (315) and a first pawl (312); the first ratchet sleeve is rotatably arranged, the inner wall of the first ratchet sleeve is provided with a first one-way tooth groove (313), the first rotating body is arranged at the first output end (101), and the first pawl is arranged at the first rotating body and leans against the inner wall of the first ratchet sleeve by means of a first spring (314); The first planetary gear mechanism (330) comprises a first input gear (331), a first planetary gear (332), a first output member (333) and a first ring gear (334), wherein the first input gear (331) is arranged on the first ratchet sleeve (311), the first ring gear is fixed, and the first planetary gear is arranged on the first output member and meshes with the first input gear and the first ring gear; The second planetary gear mechanism (340) comprises a second input gear (341), a second planetary gear (342), a second output member (343) and a second ring gear (344), wherein the second input gear (341) is arranged on the first output member (333), the second ring gear is fixed, and the second planetary gear is arranged on the second output member and meshes with the second input gear and the second ring gear; The second ratchet pawl mechanism (320) comprises a second ratchet sleeve (321) and a second pawl (322), the second ratchet sleeve is fixedly arranged, the second output member (343) extends into the second ratchet sleeve and maintains a gap (325) with the inner wall of the second ratchet sleeve, the gap (325) gradually increases in one direction and gradually decreases in another direction, the second pawl (322) is roller-shaped and is located in the gap (325), when the second output member rotates relative to the second ratchet sleeve in the direction in which the gap gradually decreases, the second pawl is freely located in the gap for the second output member to rotate in the direction, when the second output member rotates relative to the second ratchet sleeve in the direction in which the gap gradually increases, the second pawl is squeezed between the second output member and the inner wall of the second ratchet sleeve to achieve engagement and prevent the second output member from rotating in the direction; The third planetary gear mechanism (350) comprises a third input gear (351), a third planetary gear (352), a third output member (353) and a third ring gear (354); the third input gear (351) is arranged on the second output member (343); the third ring gear is fixed; the third planetary gear is arranged on the third output member and meshes with the third input gear and the third ring gear; the third output member (353) is transmission-assembled with the lifting wheel (200).

11. The driving device for driving a nail by using a gas spring to drive a striker according to any one of claims 1 to 10, characterized in that: The second transmission device (500) comprises a second speed reduction mechanism, the axis of the flywheel is located below the axis of the second output end, and the air pump is located above the flywheel.

12. The driving device for driving a nail by using a gas spring according to claim 11, characterized in that: The second speed reduction mechanism is a non-axial gear transmission mechanism, and the second one-way rotation mechanism is a ratchet and pawl mechanism.

13. The driving device for driving a nail by using a gas spring according to claim 12, characterized in that: The second transmission device (500) comprises a non-axial gear transmission mechanism (510) and a third ratchet and pawl mechanism (520) for sequentially transmitting from the second output end to the flywheel. The third ratchet and pawl mechanism is configured such that when the second output end rotates in one direction, the second output end drives the flywheel via the second transmission device, and when the second output end rotates in another direction, the third ratchet and pawl mechanism disengages the second output end from driving the flywheel.

14. The driving device for driving a nail by using a gas spring according to claim 13, characterized in that: The off-axis gear transmission mechanism (510) comprises a meshing driving gear (511) and a driven gear (512), wherein the driving gear (511) is arranged at the second output end (101), and the driven gear (512) is located below the driving gear (511); The third ratchet pawl mechanism (520) comprises a third ratchet sleeve (521), a third rotating body (522) and a third pawl (523); the third ratchet sleeve (521) is arranged on the driven gear (512); the inner wall of the third ratchet sleeve is provided with a third one-way tooth groove (524); the third rotating body (522) is arranged on the flywheel (400); the third pawl is arranged on the third rotating body and leans against the inner wall of the third ratchet sleeve by a third spring (525).

15. The driving device for driving a nail by using a gas spring according to claim 12, characterized in that: The second transmission device (500) comprises a third ratchet and pawl mechanism (520) and a non-axial gear transmission mechanism (510) for sequentially transmitting from the second output end to the flywheel, wherein the third ratchet and pawl mechanism is configured such that when the second output end rotates in one direction, the second output end drives the flywheel via the second transmission device, and when the second output end rotates in another direction, the third ratchet and pawl mechanism disengages the second output end from driving the flywheel.

16. The driving device for driving a nail by using a gas spring according to claim 15, characterized in that: The third ratchet pawl mechanism (520) comprises a third rotating body (522), a third pawl (523) and a third ratchet sleeve (521); the third rotating body (522) is arranged at the second output end (102); the third ratchet sleeve is rotatably arranged; the inner wall of the third ratchet sleeve is provided with a third one-way tooth groove (524); the third pawl is arranged at the third rotating body and leans against the inner wall of the third ratchet sleeve by a third spring (525); The off-axis gear transmission mechanism (510) comprises a meshing driving gear (511) and a driven gear (512), wherein the driving gear (511) is arranged on a third ratchet sleeve (521), the driven gear is located below the driving gear, and the flywheel (400) is coaxially arranged on the driven gear (512).

17. Nail gun, characterized by include: The driving device (10) according to any one of claims 1 to 16; A cylinder (20) is provided with a first piston (21) in the cylinder, a striker (22) extending downward is connected to the first piston, a sealing chamber (23) is provided on the upper side of the first piston, the sealing chamber is used to be filled with compressed air to form a gas spring, and the sealing chamber has an exhaust port (24); An air pump (30) for charging compressed air into the sealed chamber, comprising a second piston (31), the second piston being provided with a connecting rod (32), the connecting rod (32) being eccentrically connected to the flywheel (400); A nail magazine (40) for storing nails (41) and conveying the stored nails to the lower end of the striker; The driving device, the air cylinder, the air pump and the handle (50) are integrated into a body, and the nail magazine is detachably arranged on the body.

18. The nail gun according to claim 17, characterized in that: The handle (50) extends from the side wall of the cylinder (20) to the rear of the cylinder, a power source (51) is arranged at the tail end of the handle (50), a driving device (10) and a nail magazine (40) are located on both sides of the center plane of the handle and the cylinder, a lifting wheel (200) and a striker (22) are arranged tangentially, and an air pump (30) is located at an end of the driving device (10) away from the lifting wheel.

19. The nail gun according to claim 17 or 18, characterized in that: The nail gun also includes a controller, which is used to switch the direction of the motor. When the nail gun is first used, the motor is controlled to work in the second direction, so that the second output end first drives the flywheel so that the flywheel drives the air pump to fill the sealed cavity with compressed air to form an air spring. Then, the motor is controlled to work in the first direction, so that the first output end drives the lifting wheel so that the lifting wheel lifts the striker and the first piston and the first piston compresses the air spring. The first direction is opposite to the second direction. When the motor is controlled to work in the first direction, it is controlled by the nailing switch (52), and the lifting wheel lifts the striker to a predetermined position and then releases the striker, so that the air spring applies force to the piston to push the striker to nail.

20. The nail gun according to claim 19, characterized in that: The nail gun comprises a pressure sensor for detecting the pressure of the sealing cavity or the air pump. The pressure sensor is connected to a controller so that the air pump fills the sealing cavity with compressed air to reach a set value, and then the controller switches the motor to work in the first direction.

21. The nail gun according to claim 17 or 18, characterized in that: The fuselage is equipped with a switch for controlling the motor to work in the first direction or the second direction.

22. The nail gun according to claim 21, characterized in that: The nail gun comprises a pressure gauge (25) for detecting the pressure of the sealing chamber or the air pump.

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