Fastener driving machine

Abstract

A fastener driving machine comprises an energy storage unit, an impact unit, a control unit, a driving unit and a power unit, the control unit comprises a switching mechanism, a trigger mechanism, a coupling mechanism and a linkage mechanism, the coupling mechanism comprises a meshing end and a driving end, the meshing end is configured to be meshed with the driving unit, and the driving end is configured to be meshed with the driving unit. The driving end is configured to press the switching mechanism or release pressing on the switching mechanism, so that the switching mechanism connects or disconnects the power supply and the power unit; the trigger mechanism drives the switch mechanism to be connected with the power source and the power unit through the linkage mechanism, the power unit provides power for the driving unit, and the driving unit drives the coupling mechanism to enable the driving end to press the switch mechanism. The coupling mechanism drives the linkage mechanism so that the trigger mechanism cannot drive the switch mechanism to be connected with the power source and the power unit through the linkage mechanism. When the driving end relieves the pressing of the switching mechanism, the switching mechanism disconnects the power supply and the power unit.

Description

Technical Field

[0001] This application relates to the field of power tools, and more particularly to a fastener driving machine. Background Technology

[0002] Typically, a fastener driving machine includes an energy storage unit, a drive unit, an impact unit, a power unit, and a power supply. The impact unit moves in a first direction under the influence of energy released by the energy storage unit to drive the fastener into the workpiece. The drive unit drives the impact unit, the power unit provides power to the drive unit, and the power supply provides electrical energy to the power unit. The fastener driving machine also includes a printed circuit board (PCB) used to control when the connection between the power supply and the power unit is disconnected. The operator presses a trigger to connect the power supply and the power unit; after the fastener driving machine has been operating for a period of time, the PCB controls the disconnection of the connection between the power supply and the power unit. The PCB is relatively expensive to manufacture.

[0003] Therefore, it is necessary to provide a new fastener driving machine. Summary of the Invention

[0004] This application provides a low-cost fastener driving machine.

[0005] On one hand, this application provides a fastener driving machine, which includes:

[0006] Energy storage unit, configured to store strike energy;

[0007] An impact unit is configured to receive energy released by the energy storage unit and drive the fastener into the workpiece;

[0008] The control unit includes a switching mechanism, a trigger mechanism, a coupling mechanism, and a linkage mechanism;

[0009] The drive unit is configured to drive the impact unit and the coupling mechanism;

[0010] A power unit configured to provide power to the drive unit, wherein the power unit is supplied with electrical energy by a power source;

[0011] The coupling mechanism is configured to drive the switching mechanism to connect or disconnect the power supply and the power unit. The coupling mechanism includes an engaging end and a driving end. The engaging end is configured to engage with the driving unit. The driving end is configured to press the switching mechanism or release the pressing of the switching mechanism, so that the switching mechanism connects or disconnects the power supply and the power unit.

[0012] The trigger mechanism drives the switch mechanism to connect the power source and the power unit via the linkage mechanism. The power unit provides power to the drive unit, and the drive unit drives the coupling mechanism to press the switch mechanism with the drive end. During this process, the coupling mechanism drives the linkage mechanism to prevent the trigger mechanism from connecting the power source and the power unit via the linkage mechanism. When the drive end releases the pressure on the switch mechanism, the switch mechanism disconnects the power source and the power unit.

[0013] Furthermore, the drive unit includes an output shaft and a cam mounted on the output shaft. The cam includes a first engagement surface, a second engagement surface, a third engagement surface, and a fourth engagement surface. The engagement end engages with the first engagement surface, and the drive end does not press the switch mechanism. The engagement end engages with the second engagement surface to press the switch mechanism. The engagement end engages with the third engagement surface to keep the drive end pressing the switch mechanism. The engagement end engages with the fourth engagement surface to release the drive end from pressing the switch mechanism.

[0014] Furthermore, the drive unit also includes a first pusher and a second pusher mounted on the cam, and the impact unit includes a first mating part and a second mating part. The first pusher cooperates with the first mating part to push the impact unit from a first position to an intermediate position, and the second pusher cooperates with the second mating part to push the impact unit from the intermediate position to a second position.

[0015] Furthermore, the coupling mechanism includes a linkage assembly and a spring assembly, the linkage assembly being configured to drive the spring assembly, the linkage assembly including the engagement end, and the spring assembly including the driving end.

[0016] Furthermore, the linkage assembly includes a linkage and a first spring, the first spring being configured to reset the linkage; the spring assembly includes a first rotating shaft and a spring mounted on the first rotating shaft, the first rotating shaft being configured to allow the spring to rotate around it; the linkage drives the spring, and the spring presses the switching mechanism.

[0017] Furthermore, the connecting rod includes a base, an engagement end located on one side of the base, and a push end located on the other side of the base, the push end being configured to drive the spring.

[0018] Furthermore, the linkage mechanism includes a slider, a rocker arm, and a second rotating shaft connecting the slider and the rocker arm. The second rotating shaft is configured to allow the rocker arm to rotate around it. The trigger mechanism drives the rocker arm, and the rocker arm presses the switch mechanism.

[0019] Furthermore, the coupling mechanism is configured to drive the slider, which in turn drives the rocker arm to move the rocker arm out of the space between the switching mechanism and the trigger mechanism.

[0020] Furthermore, the slider is provided with a through hole, the coupling mechanism passes through the through hole, the coupling mechanism is provided with a guide surface, the driving unit drives the coupling mechanism to make the driving end press the switch mechanism, and the slider moves along the guide surface to make the rocker arm move out from between the switch mechanism and the trigger mechanism.

[0021] Furthermore, the control unit also includes a torsion spring assembly, which includes a mounting shaft and a first torsion spring mounted on the mounting shaft, the first torsion spring being configured to reset the slider.

[0022] Furthermore, the linkage mechanism also includes a second torsion spring, which is mounted on the second rotating shaft and configured to reset the rocker arm.

[0023] Furthermore, the fastener insertion machine also includes a safety unit configured to lock or unlock the trigger mechanism.

[0024] Furthermore, the safety unit includes a pusher, a swing arm assembly, and a limiting block assembly. The pusher drives the limiting block assembly to move through the swing arm assembly, thereby disengaging the limiting block assembly from the trigger mechanism.

[0025] Furthermore, the swing arm assembly includes a third rotation axis, a swing arm mounted on the third rotation axis, and a second spring abutting against the swing arm. The swing arm rotates about the third rotation axis and includes a first end and a second end. The pusher drives the first end, the second end drives the limiting block assembly, and the second spring is configured to reset the swing arm.

[0026] Furthermore, the limiting block assembly includes a limiting block and a third spring mounted on the limiting block, the second end of which drives the limiting block to disengage from the trigger mechanism, and the third spring is configured to reset the limiting block.

[0027] Furthermore, the trigger mechanism includes a pressing block and a fourth spring, the fourth spring being configured to reset the pressing block, the pressing block including a groove configured for insertion of the limiting block.

[0028] Furthermore, the switching mechanism includes a contact and a pressure arm; the driving end presses the pressure arm, the pressure arm presses the contact, and the switching mechanism connects the power supply and the power unit; the driving end releases the pressure on the pressure arm, the pressure arm releases the pressure on the contact, and the switching mechanism disconnects the power supply and the power unit.

[0029] Furthermore, the power unit includes a motor and a gear transmission mechanism, which cooperates with the drive unit.

[0030] In this application, the trigger mechanism drives the switch mechanism to connect the power supply and the power unit through a linkage mechanism. The power unit provides power to the drive unit, and the drive unit drives the coupling mechanism to press the switch mechanism. During this process, the coupling mechanism drives the linkage mechanism to prevent the trigger mechanism from connecting the power supply and the power unit through the linkage mechanism to the switch mechanism. When the drive end releases the pressure on the switch mechanism, the switch mechanism disconnects the power supply and the power unit. This design eliminates the need for a printed circuit board, saving costs. Attached Figure Description

[0031] Figure 1 This is a structural schematic diagram of the fastener driving machine of this application.

[0032] Figure 2 yes Figure 1 The diagram shows the structure of the power unit and drive unit.

[0033] Figure 3 yes Figure 2 The power unit and drive unit shown are cross-sectional views along the CC direction.

[0034] Figure 4 yes Figure 1 The diagram shows the structure of the impact unit and the energy storage unit.

[0035] Figure 5 yes Figure 1 The diagram shows the structure of the control unit and the drive unit.

[0036] Figure 6 yes Figure 5 Top view of the control unit and drive unit along the DD direction.

[0037] Figure 7 yes Figure 6 The control unit and drive unit shown are cross-sectional views along the EE direction.

[0038] Figures 8 to 19 It is a state diagram corresponding to a work cycle. Detailed Implementation

[0039] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.

[0040] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the application. Unless otherwise defined, the technical or scientific terms used in this application should be understood in their ordinary sense by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “a” or “one,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. “A plurality” or “several” indicates two or more. Unless otherwise stated, the terms “front,” “rear,” “lower,” and / or “upper,” and similar terms are for ease of description only and are not limited to a location or spatial orientation. The terms “comprising,” “including,” and similar terms mean that the elements or objects preceding “comprising,” encompass the elements or objects listed following “comprising,” and their equivalents, and do not exclude other elements or objects. The terms “connected,” “linked,” and similar terms are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. The singular forms “a,” “the,” and “the” used in this application specification and appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0041] Please refer to Figures 1 to 7This application provides a fastener driving machine 100, which includes an energy storage unit 10, an impact unit 20, a control unit 30, a drive unit 40, and a power unit 50. The energy storage unit 10 is configured to store impact energy. The impact unit 20 is configured to receive energy released from the energy storage unit 10 and drive the fastener into the workpiece. The control unit 30 includes a switching mechanism 31, a trigger mechanism 32, a coupling mechanism 33, and a linkage mechanism 34. The drive unit 40 is configured to drive the impact unit 20 and the coupling mechanism 33. The power unit 50 is configured to provide power to the drive unit 40, and the power unit 50 is powered by a power source. The power unit 50 includes a motor 51 and a gear transmission mechanism 52. The motor 51 is connected to a power source and provides torque and speed. The gear transmission mechanism 52 is configured to reduce speed and increase torque. The drive unit 40 is connected to the gear transmission mechanism 52. The fastener driving machine also includes a fastener guide plate 61 and a fastener storage clamp 62. The fastener storage clamp 62 is connected to the fastener guide plate 61 and contains fasteners (not shown in the figure). The fastener storage clamp 62 can feed fasteners to the fastener guide plate 61, and the fastener guide plate 61 guides the fasteners. The fasteners are used to drive the fasteners into the workpiece by the impact unit 20. In this application, the fastener is a nail, the fastener guide plate 61 is a nail guide plate, and the fastener storage clamp 62 is a nail clamp.

[0042] The energy storage unit 10 is a medium that can store energy through displacement changes, such as an air spring, a mechanical spring, or a rubber element. In this application, the energy storage unit 10 is a helical compression spring. One end of the energy storage unit 10 is mounted on the impact unit 20, and the other end of the energy storage unit 10 is in contact with the stationary guide sleeve 90. When the energy storage unit 10 releases impact energy, the impact unit 20 receives the impact energy released by the energy storage unit 10 and drives the fastener into the workpiece along the first direction X.

[0043] When the drive unit 40 engages with the impact unit 20, the drive unit 40 drives the impact unit 20 to move along the second direction Y (i.e., the opposite direction of the first direction X), thereby storing energy in the energy storage unit 10. When the drive unit 40 disengages from the impact unit 20, under the force released by the energy storage unit 10, the impact unit 20 moves along the first direction X, thereby achieving the fastener driving function. The drive unit 40 includes an output shaft 41 and a cam 42 mounted on the output shaft 41. The drive unit 40 also includes a first pusher 43 and a second pusher 44 fixed to the cam 42, which can rotate together with the cam 42. The impact unit 20 includes a first mating part 21 and a second mating part 22. The first pusher 43 engages with the first mating part 21 to push the impact unit 20 from a first position to an intermediate position, and the second pusher 44 engages with the second mating part 22 to push the impact unit 20 from the intermediate position to a second position. The first position is the initial position, and the second position is the energy storage position. In some embodiments, the first pushing member 43 includes a first pin and a first bushing mounted on the first pin, and the second pushing member 44 includes a second pin and a second bushing mounted on the second pin; in other embodiments, the first pushing member 43 is the first pin and the second pushing member 44 is the second pin.

[0044] The impact unit 20 includes a striker 23 and a striker seat 24. The striker 23 is configured to strike a fastener and is connected to the striker seat 24 by a pin, allowing the striker 23 and the striker seat 24 to move together. The striker seat 24 includes a first mating portion 21 and a second mating portion 22. The first mating portion 21 has a first mating surface 25, and the second mating portion 22 has a second mating surface 26. A first pushing member 43 mates with the first mating surface 25, and a second pushing member 44 mates with the second mating surface 26.

[0045] The coupling mechanism 33 is configured to drive the switching mechanism 31 to connect or disconnect the power supply and the power unit 50. The coupling mechanism 33 includes an engagement end 331 and a driving end 332. The engagement end 331 is configured to engage with the driving unit 40. The driving end 332 is configured to press the switching mechanism 31 or release the press on the switching mechanism 31 so that the switching mechanism 31 connects or disconnects the power supply and the power unit 50. That is, the driving end 332 presses the switching mechanism 31 to connect the switching mechanism 31 to the power supply and the power unit 50, and the driving end 332 releases the press on the switching mechanism 31 to disconnect the switching mechanism 31 from the power supply and the power unit 50.

[0046] The switching mechanism 31 includes a contact 311 and a pressure arm 312. (Combined) Figure 6The cam 42 has meshing surfaces, including a first meshing surface 431, a second meshing surface 432, a third meshing surface 433, and a fourth meshing surface 434. The first meshing surface 431 is the meshing surface with a smaller distance from the output shaft 41, the second meshing surface 432 is the meshing surface with a gradually increasing distance from the output shaft 41, the third meshing surface 433 is the meshing surface with a larger distance from the output shaft 41, and the fourth meshing surface 434 is the meshing surface with a gradually decreasing distance from the output shaft 41. When the engagement end 331 engages with the first engagement surface 431, the drive end 332 does not press the pressure arm 312; when the engagement end 331 engages with the second engagement surface 432, the connecting rod 351 moves along the second direction Y, so that the drive end 332 presses the pressure arm 312, and the pressure arm 312 presses the contact 311, thereby connecting the switch mechanism 31 to the power supply and the power unit 50; when the engagement end 331 engages with the third engagement surface 433, the drive end 332 keeps pressing the pressure arm 312, and the pressure arm 312 keeps pressing the contact 311, thereby keeping the switch mechanism 31 connected to the power supply and the power unit 50; when the engagement end 331 engages with the fourth engagement surface 434, the connecting rod 351 moves along the first direction X, so that the drive end 332 releases the pressure on the pressure arm 312, and the pressure arm 312 releases the pressure on the contact 311, thereby disconnecting the switch mechanism 31 from the power supply and the power unit 50.

[0047] First, when the user pulls the trigger mechanism 32, the trigger mechanism 32 drives the switch mechanism 31 to connect the power supply and the power unit 50 through the linkage mechanism 34. The power unit 50 provides power to the drive unit 40. The drive unit 40 drives the coupling mechanism 33 to make the drive end 332 press the switch mechanism 31. During this process, the coupling mechanism 33 drives the linkage mechanism 34 so that the trigger mechanism 32 cannot drive the switch mechanism 31 to connect the power supply and the power unit 50 through the linkage mechanism 34. The drive end 332 keeps pressing the switch mechanism 31. When the drive end 332 releases the pressure on the switch mechanism 31, the switch mechanism 31 disconnects the power supply and the power unit 50.

[0048] The coupling mechanism 33 includes a linkage assembly 35 and a spring assembly 36. The linkage assembly 35 is configured to drive the spring assembly 36. The linkage assembly 35 includes an engagement end 331, and the spring assembly 36 includes a driving end 332. The linkage assembly 35 includes a linkage 351 and a first spring 352. The first spring 352 is sleeved on the linkage 351 and is configured to reset the linkage 351. The spring assembly 36 includes a first rotating shaft 361 and a spring 362 mounted on the first rotating shaft 361. The first rotating shaft 361 is configured to allow the spring 362 to rotate around it. The linkage 351 drives the spring 362, which presses the pressure arm 312. The pressure arm 312 presses the contact 311, thereby connecting the switching mechanism 31 to the power supply and the power unit 50. The connecting rod 351 includes a base 353, an engagement end 331 located on one side of the base 353, and a push end 354 located on the other side of the base 353. The engagement end 331 engages with the cam 42, and the push end 354 is configured to drive the spring 362.

[0049] The linkage mechanism 34 includes a slider 341, a rocker arm 342, and a second rotating shaft 343 connecting the slider 341 and the rocker arm 342. The second rotating shaft 343 is configured to allow the rocker arm 342 to rotate around it. The trigger mechanism 32 drives the rocker arm 342, which presses the switch mechanism 31. Specifically, the user operates the trigger mechanism 32, which drives the rocker arm 342, which presses the pressure arm 312, which in turn presses the contact point 311. The coupling mechanism 33 is configured to drive the slider 341, which in turn drives the rocker arm 342 to move the rocker arm 342 out of the space between the switch mechanism 31 and the trigger mechanism 32. Specifically, the slider 341 has a through hole 340 through which the coupling mechanism 33 passes. The coupling mechanism 33 has a guide surface 330. The drive unit 40 drives the coupling mechanism 33 to press the switch mechanism 31 with the drive end 332. The slider 341 moves along the guide surface 330 to move the rocker arm 342 out of the space between the switch mechanism 31 and the trigger mechanism 32. Specifically, the guide surface 330 is provided on the connecting rod 351 and is inclined. When the drive unit 40 drives the connecting rod 351 to move in the second direction Y, the slider 341 moves along the guide surface 330 to move the rocker arm 342 out of the space between the switch mechanism 31 and the trigger mechanism 32. The control unit 30 also includes a torsion spring assembly 37, which includes a mounting shaft 371 and a first torsion spring 372 mounted on the mounting shaft 371. The first torsion spring 372 is configured to reset the slider 341. The linkage mechanism 34 also includes a second torsion spring 344, which is mounted on a second rotation shaft 343 and is configured to reset the rocker arm 342.

[0050] The fastener insertion machine 100 also includes a safety unit 70, which is configured to lock or unlock the trigger mechanism 32. The safety unit 70 includes a pusher 71, a swing arm assembly 72, and a limiting block assembly 73. The pusher 71 drives the limiting block assembly 73 to move via the swing arm assembly 72, thereby disengaging the limiting block assembly 73 from the trigger mechanism 32. The swing arm assembly 72 includes a third rotation axis 720, a swing arm 721 mounted on the third rotation axis 720, and a second spring 722 abutting against the swing arm 721. The swing arm 721 rotates about the third rotation axis 720 and includes a first end 723 and a second end 724. The pusher 71 drives the first end 723, the second end 724 drives the limiting block assembly 73, and the second spring 722 is configured to reset the swing arm 721. The limiting block assembly 73 includes a limiting block 731 and a third spring 732 mounted on the limiting block 731. The second end 724 drives the limiting block 731 to disengage from the trigger mechanism 32. The third spring 732 is configured to reset the limiting block 731. The trigger mechanism 32 includes a pressing block 321, a fourth spring 322, and a fourth rotating shaft (not shown). The fourth rotating shaft is configured to allow the pressing block 321 to rotate around it. The fourth spring 322 is configured to reset the pressing block 321. The pressing block 321 includes a body portion 323, a pressing post 324 disposed on one side of the body portion 323, and a groove 325 disposed on the other side of the body portion 323. The pressing post 324 is configured to press the rocker arm 342, and the groove 325 is configured to allow the limiting block 731 to be inserted.

[0051] Figures 8 to 19 This is a diagram showing the states of one working cycle of the fastener insertion machine of this application.

[0052] Figure 8 In the initial state of the entire working cycle, the energy storage unit 10 is compressed by the impact unit 20. At this time, the first pushing member 43 of the drive unit 40 comes into contact with the first mating part 21 of the impact unit 20.

[0053] like Figure 9 As shown, the user presses the pusher 71, causing the pusher 71 to move along the second direction Y. The pusher 71 then pushes the swing arm 721 to rotate around the third rotation axis 720. The swing arm 721 pushes the limiting block 731 to move along the first direction X until the limiting block 731 is completely dislodged from the groove 325 of the pressing block 321.

[0054] like Figure 10 As shown, since the limiting block 731 does not restrict the pressing block 321, the user can press the pressing block 321, causing it to rotate around the fourth rotation axis (not shown). The pressing post 324 of the pressing block 321 pushes the rocker arm 342 to rotate around the second rotation axis 343. The rocker arm 342 presses the pressure arm 312 of the switch mechanism 31, and the pressure arm 312 presses the contact 311 into place, connecting the power supply to the motor. The motor then begins to rotate clockwise (in conjunction with...). Figure 6 As shown (viewed from top to bottom), rotate.

[0055] like Figure 11 As shown, the pressure arm 312 of the switching mechanism 31 is not pressed by the spring 362, and the connecting rod 351 is at a small distance from the first engagement surface 431 of the output shaft 41, without contacting the spring 362. The motor drives the output shaft 41 to rotate clockwise, and the first pushing member 43 of the drive unit 40 cooperates with the first mating part 21 of the impact unit 20 to push the impact unit 20 to compress the energy storage unit 10 along the second direction Y. Due to the rotation of the cam 42, the engagement end 331 of the connecting rod 351 begins to engage with the second engagement surface 432, and the connecting rod 351 begins to move along the second direction Y. The connecting rod 351 begins to push the slider 341 of the linkage mechanism 34 to move along the third direction M. That is, the inclined surface of the connecting rod 351 serves as the guide surface 330, and the slider 341 moves along the guide surface 330.

[0056] like Figure 12 As shown, the cam 42 of the drive unit 40 continues to rotate, the meshing end 331 of the connecting rod 351 meshes with the second meshing surface 432, the connecting rod 351 continues to move along the second direction Y, the slider 341 continues to move along the guide surface 330, the slider 341 drives the rocker arm 342, the rocker arm 342 moves out from between the pressing post 324 and the pressing arm 312, the pressing arm 312 and the contact 311 of the switch mechanism 31 are both reset, the connection between the motor and the power supply is disconnected, and at the same time, the connecting rod 351 is about to push the spring 362. Note that at this time, although the pressing block 321 of the trigger mechanism 32 is still in the user pressing state, since the rocker arm 342 has moved out from between the pressing post 324 and the pressing arm 312, the pressing block 321 can no longer press the pressing arm 312 of the switch mechanism 31 through the rocker arm 342.

[0057] like Figure 13 As shown, since the motor, gear transmission mechanism and drive unit 40 all have inertia, this inertia causes the cam 42 to continue rotating. The meshing end 331 of the connecting rod 351 meshes with the second meshing surface 432, thereby pushing the connecting rod 351 to continue moving along the second direction Y. In a short time, the pushing end 354 of the connecting rod 351 presses the spring 362, the spring 362 presses the pressure arm 312 of the switch mechanism 31, the pressure arm 312 presses the contact 311 into place, and the motor and power supply are reconnected. In another embodiment, the length of the connecting rod 351 can be increased so that the pushing end 354 of the connecting rod 351 presses the spring 362 before the rocker arm 342 moves out from between the pressing post 324 and the pressing arm 312. The spring 362 presses the pressing arm 312 of the switch mechanism 31, and the pressing arm 312 presses the contact 311 into place. Then the rocker arm 342 moves out from between the pressing post 324 and the pressing arm 312. In this way, the overall function is not affected.

[0058] The power supply continues to supply power to the motor, and the power unit 50 provides power to the drive unit 40. The cam 42 of the drive unit 40 continues to rotate, and the meshing end 331 of the connecting rod 351 begins to mesh with the third meshing surface 433. The second pushing member 44 of the drive unit 40 cooperates with the second mating part 22 of the impact unit 20, thereby pushing the impact unit 20 to continue to compress the energy storage unit 10. At the same time, under the push of the connecting rod 351, the slider 341 moves along the guide surface 330 of the connecting rod 351 in the third direction M to the highest position, and the rocker arm 342 is reset under the action of the second torsion spring 344.

[0059] like Figure 14 As shown, the output shaft 41 continues to rotate, the meshing end 331 of the connecting rod 351 remains engaged with the third meshing surface 433, the second pushing member 44 of the drive unit 40 cooperates with the second mating part 22 of the impact unit 20 to push the impact unit 20 to compress the energy storage unit 10 until the energy storage unit 10 is compressed to the top dead center. At the same time, the pushing end 354 of the connecting rod 351 keeps pressing the spring 362, the spring 362 keeps pressing the pressure arm 312, and the pressure arm 312 keeps pressing the contact 311 into place, so that the contact 311 is kept in the pressed state, and the slider 341 of the linkage mechanism 34 remains in the highest position.

[0060] like Figure 15 As shown, the output shaft 41 continues to rotate, the meshing end 331 of the connecting rod 351 remains engaged with the third meshing surface 433, the second pushing member 44 of the drive unit 40 disengages from the second mating part 22 of the impact unit 20, and the impact unit 20 drives the fastener into the workpiece along the first direction X under the action of the force released by the energy storage unit 10, and the impact unit 20 finally impacts the buffer block 80.

[0061] like Figure 16 As shown, the output shaft 41 continues to rotate, the meshing end 331 of the connecting rod 351 remains engaged with the third meshing surface 433, the first pushing member 43 of the drive unit 40 re-engages with the first mating part 21 of the impact unit 20, thereby pushing the impact unit 20 to re-compress the energy storage unit 10 along the second direction Y. At the same time, since the meshing end 331 of the connecting rod 351 remains engaged with the third meshing surface 433 of the cam 42, the pressure arm 312 and the contact 311 of the switching mechanism 31 continue to be pressed.

[0062] like Figure 17As shown, the output shaft 41 continues to rotate, and the meshing end 331 of the connecting rod 351 begins to mesh with the fourth meshing surface 434 of the cam 42. Under the action of the restoring force of the first spring 352, the connecting rod 351 moves along the first direction X until the connecting rod 351 disengages from the spring 362. As the connecting rod 351 moves along the first direction X, the pushing end 354 of the connecting rod 351 releases the pressure on the spring 362, and the spring 362 releases the pressure on the pressure arm 312 of the switching mechanism 31. Therefore, the pressure arm 312 of the switching mechanism 31 and the contact 311 reset under the action of their own restoring force. The pressure arm 312 of the switching mechanism 31 pushes the spring 362 to reset, and the connection between the motor and the power supply is disconnected. At the same time, as the connecting rod 351 moves along the first direction X, the slider 341 gradually disengages from the guide surface 330 of the connecting rod 351. Under the action of the restoring force of the first torsion spring 372, the slider 341 moves along the fourth direction N, and the rocker arm 342 abuts against the pressing post 324 of the pressing block 321.

[0063] like Figure 18 As shown, when the pressure arm 312 of the switch mechanism 31 and the contact 311 are not pressed, the motor is short-circuited through the switch mechanism 31. Therefore, at this time, the motor starts to brake, but due to inertia, the cam 42 will continue to rotate a certain angle until it stops in the initial state. The connecting rod 351 also disengages from the slider 341 under the action of the restoring force of the first spring 352 and returns to the initial position.

[0064] like Figure 19 As shown, when the user releases the pressure on the pusher 71, the swing arm 721 and the pusher 71 return to their initial positions under the restoring force of the second spring 722 and the third spring 732, while the limiting block 731 returns to the position abutting against the pressing block 321, waiting for the pressing block 321 to reset.

[0065] The user releases the pressing block 321, which resets under the restoring force of the fourth spring 322. The limiting block 731 then moves back into the groove 325 of the pressing block 321, locking it in place. The slider 341 then returns to its initial position along the fourth direction N under the restoring force of the first torsion spring 372, completing the entire working cycle back to its initial state. Figure 8 As shown.

[0066] In this application, the trigger mechanism 32 drives the switch mechanism 31 to connect the power supply and the power unit 50 through the linkage mechanism 34. The power unit 50 provides power to the drive unit 40. The drive unit 40 drives the coupling mechanism 33 to make the drive end 332 press the switch mechanism 31. During this process, the coupling mechanism 33 drives the linkage mechanism 34 to prevent the trigger mechanism 32 from driving the switch mechanism 31 to connect the power supply and the power unit 50 through the linkage mechanism 34. When the drive end 332 releases the pressure on the switch mechanism 31, the switch mechanism 31 disconnects the power supply and the power unit 50. This design eliminates the need for a printed circuit board, saving costs.

[0067] The above description is merely a preferred embodiment of this application and is not intended to limit this application in any way. Although this application has disclosed the preferred embodiment as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A fastener driver, comprising: a storage unit configured to store striking energy; a striking unit configured to accept the energy released by the storage unit and drive a fastener into a workpiece; a control unit comprising a switch mechanism, a trigger mechanism, a coupling mechanism and a linkage mechanism; a driving unit configured to drive the striking unit and the coupling mechanism; a power unit configured to provide power to the driving unit, the power unit being powered by a power source; the coupling mechanism is configured to drive the switch mechanism to connect or disconnect the power source and the power unit, the coupling mechanism comprising an engaging end and a driving end, the engaging end being configured to engage with the driving unit, the driving end being configured to press or release the pressing of the switch mechanism to connect or disconnect the power source and the power unit; characterized in that the trigger mechanism drives the switch mechanism to connect the power source and the power unit through the linkage mechanism, the power unit provides power to the driving unit, the driving unit drives the coupling mechanism to press the switch mechanism with the driving end, in the process, the coupling mechanism drives the linkage mechanism to make the trigger mechanism unable to drive the switch mechanism to connect the power source and the power unit through the linkage mechanism; when the driving end releases the pressing of the switch mechanism, the switch mechanism disconnects the power source and the power unit.

2. The fastener driver of claim 1, wherein the driving unit comprises an output shaft and a cam mounted on the output shaft, the cam comprising a first engaging surface, a second engaging surface, a third engaging surface and a fourth engaging surface; the engaging end engages with the first engaging surface, the driving end does not press the switch mechanism, the engaging end engages with the second engaging surface to press the switch mechanism with the driving end, the engaging end engages with the third engaging surface to keep the driving end pressing the switch mechanism, and the engaging end engages with the fourth engaging surface to release the pressing of the switch mechanism by the driving end.

3. The fastener driver of claim 2, wherein, the driving unit further comprises a first push member and a second push member mounted on the cam, the striking unit comprises a first cooperating part and a second cooperating part, the first push member cooperates with the first cooperating part to push the striking unit from a first position to an intermediate position, and the second push member cooperates with the second cooperating part to push the striking unit from the intermediate position to a second position.

4. The fastener driver of claim 1, wherein the coupling mechanism comprises a linkage assembly and a leaf spring assembly, the linkage assembly is configured to drive the leaf spring assembly, the linkage assembly comprises the engaging end, and the leaf spring assembly comprises the driving end.

5. The fastener driver of claim 4 wherein, the linkage assembly comprises a linkage and a first spring, the first spring is configured to reset the linkage; the leaf spring assembly comprises a first rotating shaft and a leaf spring mounted on the first rotating shaft, the first rotating shaft is configured to rotate the leaf spring therearound; the linkage drives the leaf spring, and the leaf spring presses the switch mechanism.

6. The fastener driver of claim 5, wherein, the linkage comprises a base, the engaging end on one side of the base and a pushing end on the other side of the base, the pushing end is configured to drive the leaf spring.

7. The fastener driver of claim 1, wherein, The linkage mechanism comprises a slider, a rocker arm, and a second rotating shaft connecting the slider and the rocker arm, the second rotating shaft is configured to rotate the rocker arm, the trigger mechanism drives the rocker arm, and the rocker arm presses the switch mechanism.

8. The fastener driver of claim 7, wherein, The coupling mechanism is configured to drive the slider to move the rocker arm away from the switch mechanism and the trigger mechanism.

9. The fastener driver of claim 8, wherein, The slider is provided with a through hole, the coupling mechanism passes through the through hole, the coupling mechanism is provided with a guide surface, the driving unit drives the coupling mechanism to press the switch mechanism with the driving end, and the slider moves along the guide surface to move the rocker arm away from the switch mechanism and the trigger mechanism.

10. The fastener driver of claim 9, wherein, The control unit further comprises a torsional spring assembly, the torsional spring assembly comprises a mounting shaft and a first torsional spring mounted on the mounting shaft, and the first torsional spring is configured to reset the slider.

11. The fastener driver of claim 7, wherein, The linkage mechanism further comprises a second torsional spring, the second torsional spring is mounted on the second rotating shaft, and the second torsional spring is configured to reset the rocker arm.

12. The fastener driver of claim 1, wherein, The fastener driver further comprises a safety unit, the safety unit is configured to lock or unlock the trigger mechanism.

13. The fastener driver of claim 12, wherein, The safety unit comprises a pushing piece, a swing arm assembly, and a limiting block assembly, the pushing piece drives the limiting block assembly to move through the swing arm assembly, so that the limiting block assembly is separated from the trigger mechanism.

14. The fastener driver of claim 13, wherein, The swing arm assembly comprises a third rotating shaft, a swing arm mounted on the third rotating shaft, and a second spring abutting the swing arm, the swing arm rotates around the third rotating shaft, the swing arm comprises a first end and a second end, the pushing piece drives the first end, the second end drives the limiting block assembly, and the second spring is configured to reset the swing arm.

15. The fastener driver of claim 14, wherein, The limiting block assembly comprises a limiting block and a third spring mounted on the limiting block, the second end drives the limiting block to separate the limiting block from the trigger mechanism, and the third spring is configured to reset the limiting block.

16. The fastener driver of claim 15, wherein, The trigger mechanism comprises a pressing block and a fourth spring, the fourth spring is configured to reset the pressing block, the pressing block comprises a groove, and the groove is configured to insert the limiting block.

17. The fastener driver of claim 1, wherein, The switch mechanism comprises a contact and a pressing arm; the driving end presses the pressing arm, the pressing arm presses the contact, the switch mechanism connects the power supply and the power unit; the driving end releases the pressing of the pressing arm, the pressing arm releases the pressing of the contact, and the switch mechanism disconnects the power supply and the power unit.

18. The fastener driver of claim 1, wherein, The power unit comprises a motor and a gear transmission mechanism, and the gear transmission mechanism cooperates with the driving unit.

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