Fastener driver

Abstract

A fastener driver includes a storage unit, an impact unit, a propelling unit, a driving unit, and a resetting unit. The storage unit is configured to store impact energy. The impact unit receives the energy from the storage unit to drive a fastener into a workpiece in a first direction, the impact unit having a storage position, a transition position, and a release position. The propelling unit propels the impact unit from the release position to the transition position, the propelling unit having a first position corresponding to the release position and a second position corresponding to the transition position. The driving unit is coupled to or decoupled from the propelling unit, the driving unit having a coupled state and a decoupled state with the propelling unit. The resetting unit provides a resetting force to move the propelling unit from the second position to the first position; and the impact unit is decoupled from the propelling unit at the transition position when the propelling unit moves from the second position to the first position.

Description

Technical Field

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

[0002] Generally, a fastener driving machine includes an energy storage unit, a drive unit, and an impact unit. The impact unit moves along a first direction under the influence of energy released by the energy storage unit to drive the fastener into the workpiece. The drive unit includes multiple first meshing teeth, and the impact unit includes multiple second meshing teeth. During operation, the multiple first meshing teeth of the drive unit sequentially engage with the multiple second meshing teeth of the impact unit. The drive unit drives the impact unit to move along a second direction, allowing the energy storage unit to store energy. The second direction is opposite to the first direction. During the fastener driving process, fastener jamming may sometimes occur. When jammed, the impact unit may not stop at a position where it can properly engage with the drive unit, causing the fastener driving machine to malfunction.

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

[0004] This application provides a fastener insertion machine that operates stably and smoothly.

[0005] On one hand, this application provides a fastener driving machine, the fastener driving machine comprising:

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

[0007] An impact unit receives energy from the energy storage unit and drives the fastener into the workpiece along a first direction. The impact unit has an energy storage position, a transition position, and a release position.

[0008] A propulsion unit, in cooperation with the impact unit, is used to push the impact unit from the release position to the transition position. The propulsion unit has a first position corresponding to the release position and a second position corresponding to the transition position.

[0009] A drive unit is coupled to or decoupled from the propulsion unit, and the drive unit has a coupled state and a decoupled state with the propulsion unit;

[0010] A reset unit provides a reset force for the propulsion unit to move from the second position to the first position; and when the propulsion unit moves from the second position to the first position, the impact unit disengages from the propulsion unit at the transition position.

[0011] Furthermore, the reset unit extends along the direction of movement of the impact unit.

[0012] Furthermore, the fastener driving machine also includes a support unit, which supports the energy storage unit, the impact unit, the propulsion unit and the drive unit;

[0013] The reset unit has a first end and a second end arranged in opposite directions. The first end is connected to the support unit, and the second end is connected to the propulsion unit.

[0014] Furthermore, the reset unit is a tension spring, and when the push unit is in the second position, the reset unit is in a stretched state.

[0015] Furthermore, the drive unit includes a motor and a drive mechanism, the motor provides power to the drive mechanism, and the drive mechanism includes a drive wheel, the drive wheel including a mating area and a non-matting area arranged along the circumference;

[0016] The mating area engages with the teeth of the propulsion unit to form a meshing state.

[0017] Furthermore, the drive unit includes a drive mechanism, the drive mechanism includes a drive wheel, and the propulsion unit is disposed opposite to the drive wheel along a second direction; the propulsion unit includes a meshing tooth area, and in the second direction, the reset unit is located on the side of the meshing tooth area opposite to the drive wheel, and the second direction is perpendicular to the first direction.

[0018] Furthermore, the reset unit and the impact unit are arranged along a third direction, which is perpendicular to the first direction and the second direction.

[0019] Furthermore, the propulsion unit includes a groove that is open in the opposite direction to the first direction, and the impact unit includes a protrusion that mates with the groove;

[0020] During the movement of the propulsion unit from the first position to the second position, the protrusion is located in the groove, and the impact unit is pushed by the propulsion unit in the opposite direction of the first direction; when the propulsion unit moves from the second position to the first position, the groove disengages from the protrusion.

[0021] Furthermore, the drive mechanism also includes a crank, which is coupled or discoupled from the impact unit. The crank has a coupled state and a discoupled state with the impact unit. When the impact unit is discoupled from the crank, the impact unit drives the fastener into the workpiece under the impact energy released by the energy storage unit.

[0022] Furthermore, after the mating area disengages from the propulsion unit, the crank and the impact unit are in a coupled state, and the crank drives the impact unit to move from the transition position to the energy storage position.

[0023] Furthermore, the fastener driving machine also includes a buffer component, and the pushing unit abuts against the buffer component after being reset by the reset unit.

[0024] On the other hand, this application also provides a fastener driving machine, the fastener driving machine comprising:

[0025] Energy storage unit, used to store strike energy;

[0026] An impact unit receives energy from the energy storage unit and drives the fastener into the workpiece along a first direction. The impact unit has an energy storage position and a release position.

[0027] A propulsion unit drives the impact unit from the release position to the energy storage position. The propulsion unit has a first position corresponding to the release position and a second position corresponding to the energy storage position.

[0028] A drive unit is coupled to or decoupled from the propulsion unit, and the drive unit has a coupled state and a decoupled state with the propulsion unit;

[0029] The reset unit provides a reset force for the propulsion unit to move from the second position to the first position.

[0030] Furthermore, during the process of the propulsion unit moving from the second position to the first position, the propulsion unit disengages from the impact unit.

[0031] Furthermore, the drive unit includes a motor and a drive mechanism, the motor provides power to the drive mechanism, and the drive mechanism includes a drive wheel, the drive wheel including a mating area and a non-matting area arranged along the circumference;

[0032] The mating area engages with the teeth of the propulsion unit to form a meshing state.

[0033] Furthermore, the propulsion unit moves from the second position to the first position under the combined action of the energy storage unit and the reset unit.

[0034] In this application, the drive unit can indirectly engage with the impact unit through the propulsion unit, and the propulsion unit can return to the initial position independently through the reset unit. When the impact unit stops at an abnormal position due to a jamming pin, the drive unit can always correctly engage with the propulsion unit and drive the propulsion unit to the abnormal position where the impact unit is stopped, thereby enabling the propulsion unit and the impact unit to re-engage correctly. Attached Figure Description

[0035] Figure 1 This is a perspective view of a portion of the structure of the fastener driving machine according to the first embodiment of this application.

[0036] Figure 2 yes Figure 1 The diagram shows a structural view of the fastener driving machine from one perspective.

[0037] Figure 3 yes Figure 2 The fastener driving machine shown is a cross-sectional view along AA.

[0038] Figure 4 yes Figure 1 The diagram shows a structural view of the fastener driving machine from one perspective.

[0039] Figure 5 yes Figure 4 The fastener driving machine shown is a cross-sectional view along BB.

[0040] Figure 6 yes Figure 1 A perspective view of part of the fastener-driving machine shown.

[0041] Figure 7 yes Figure 5 The diagram shows the structure of the impact unit and the piston.

[0042] Figure 8 yes Figure 1 This is a structural diagram of one view of a portion of the fastener-driving machine shown.

[0043] Figure 9 yes Figure 8 The diagram shows a partial sectional view of the fastener-driving machine along the CC direction.

[0044] Figure 10 This is a state diagram of a working cycle of the fastener driving machine according to the first embodiment of this application.

[0045] Figure 11 This is a diagram showing the states of a working cycle of the fastener driving machine according to the first embodiment of this application under jammed conditions.

[0046] Figure 12 This is a perspective view of a portion of the structure of the fastener driving machine according to the second embodiment of this application.

[0047] Figure 13 This is a state diagram of a working cycle of the fastener driving machine according to the second embodiment of this application.

[0048] Figure 14This is a diagram showing the states of a working cycle of the fastener driving machine according to the second embodiment of this application under jammed conditions. Detailed Implementation

[0049] 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.

[0050] 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.

[0051] Please refer to Figures 1 to 11The first embodiment of this application provides a fastener driving machine, which includes an energy storage unit 10, an impact unit 20, a propulsion unit 30, a drive unit 40, a support unit 50, and a reset unit 60. The support unit 50 supports the energy storage unit 10, the impact unit 20, the propulsion unit 30, and the drive unit 40. The reset unit 60 has a first end and a second end arranged opposite to each other. The first end is connected to the support unit 50, and the second end is connected to the propulsion unit 30. The support unit 50 includes a base 51, a fastener guide plate 52, and a fastener storage clamp 53. The fastener storage clamp 53 is connected to the fastener guide plate 52 and contains fasteners (not shown in the figure). The fastener storage clamp 53 can convey fasteners to the fastener guide plate 52, and the fastener guide plate 52 guides the fasteners. The fasteners are used to be driven into the workpiece by the impact unit 20. In this application, the fastener is a nail, the fastener guide plate 52 is a nail guide plate, and the fastener storage clamp 53 is a nail clamp.

[0052] 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 component. In this application, the energy storage unit 10 is an air spring, which includes a cylinder 11, a piston 12, and a sealing ring 13. The cylinder 11 and the piston 12 form a closed space containing gas, and the cylinder 11 and the piston 12 are sealed together by the sealing ring 13. One end of the impact unit 20 is connected to the piston 12, and the other end of the impact unit 20 is used to drive the fastener into the workpiece. The impact unit 20 can move together with the piston 12. The energy storage unit 10 is used to store impact energy. 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.

[0053] The impact unit 20 has an energy storage position, a transition position, and a release position, with the transition position located between the energy storage position and the release position. The piston 12 has a top dead center corresponding to the energy storage position and a bottom dead center corresponding to the release position. When the impact unit 20 is in the energy storage position, the piston 12 is at the top dead center, and the energy storage unit 10 is in an energy storage state. When the impact unit 20 is in the release position, the piston 12 is at the bottom dead center, and the energy storage unit 10 is in a release state. The propulsion unit 30 has a first position corresponding to the release position and a second position corresponding to the transition position. The drive unit 40 is coupled or decoupled from the propulsion unit 30, that is, the drive unit 40 has a coupled state and a decoupled state with the propulsion unit 30. When the drive unit 40 and the propulsion unit 30 are in a coupled state, the drive unit 40 drives the propulsion unit 30 to move from the initial position to the first position. At the first position, the propulsion unit 30 cooperates with the impact unit 20 to push the impact unit 20 from the release position to the energy storage position, and the impact unit 20 pushes the piston 12 from the bottom dead center to the top dead center. During the process of the propulsion unit 30 driving the impact unit 20, the drive unit 40 is coupled to the impact unit 20 to drive the impact unit 20 to move towards the energy storage position. The drive unit 40 and the propulsion unit 30 are about to decouple. When the drive unit 40 and the propulsion unit 30 decouple, the impact unit 20 is in the transition position, and the propulsion unit 30 is in the second position. At this time, the propulsion unit 30 moves from the second position to the first position under the action of the reset unit 60 until it returns to the initial position. The impact unit 20 disengages from the propulsion unit 30 at the transition position, and the drive unit 40 and the impact unit 20 are coupled. The drive unit 40 drives the impact unit 20 to move from the transition position to the energy storage position until the impact unit 20 is in the energy storage position. At this time, the piston 12 is at the top dead center, and the energy storage unit 10 is in the energy storage state. The reset unit 60 provides the reset force for the propulsion unit 30 to move from the second position to the first position until it returns to the initial position; and when the propulsion unit 30 moves from the second position to the first position under the action of the reset unit 60, the impact unit 20 disengages from the propulsion unit 30 at the transition position. The reset unit 60 extends along the movement direction of the impact unit 20. In this application, the reset unit 60 is a tension spring, which includes a first end and a second end. The first end of the tension spring is connected to the support unit 50, and the second end of the tension spring is connected to the propulsion unit 30. Specifically, the support unit 50 also includes a hook 90 fixed to the fastener guide plate 52, and the first end of the tension spring is mounted on the hook 90. ​​The propulsion unit 30 includes a pin 32, and the second end of the tension spring is mounted on the pin 32. When the propulsion unit 30 is in the second position, the reset unit 60 is in a stretched state.

[0054] The propulsion unit 30 includes a groove 31 disposed on the side opposite to the fastener, the groove 31 being open in the opposite direction of the first direction X. The impact unit 20 includes a protrusion 21 that engages with the groove 31. During the movement of the propulsion unit 30 from the first position to the second position, the protrusion 21 is located within the groove 31, and the impact unit 20 is pushed by the propulsion unit 30 in the opposite direction of the first direction X. When the propulsion unit 30 moves from the second position to the first position under the action of the reset unit 60, the groove 31 disengages from the protrusion 21. In this application, the propulsion unit 30 is a rack, and the protrusion 21 is a pin mounted on the body of the impact unit 20.

[0055] The drive unit 40 includes a motor 43, an output shaft 410, a reduction mechanism 42, and a drive mechanism 41. The motor 43 provides power to the drive mechanism 41. The drive mechanism 41 includes a drive wheel 411 and a crank 412 mounted on the output shaft 410. The drive wheel 411 and the crank 412 are distributed on different planes along the axial direction of the output shaft 410. The drive wheel 411 includes a mating area and a non-matting area arranged along its circumference. The mating area meshes with the teeth of the propulsion unit 30 to form a meshing state. Specifically, the mating area includes multiple first meshing teeth 413, and the propulsion unit 30 includes multiple second meshing teeth 33. The multiple first meshing teeth 413 and the multiple second meshing teeth 33 mesh sequentially to form a meshing state. Specifically, driven by the motor 43, the output shaft 410 begins to rotate. The drive wheel 411 and crank 412 rotate with the output shaft 410. When the first meshing tooth 413 of the engagement area of ​​the drive wheel 411 meshes with the second meshing tooth 33 of the propulsion unit 30, the drive wheel 411 drives the propulsion unit 30 to move from the initial position to the first position. At the first position, the propulsion unit 30 engages with the impact unit 20, and the propulsion unit 30 pushes the impact unit 20 to move from the release position to the transition position. During the process of the propulsion unit 30 pushing the impact unit 20, the crank 412 couples with the impact unit 20 to drive the impact unit 20 to move towards the energy storage position. During the movement of unit 20 towards the energy storage position, the first meshing tooth 413 of the engagement area of ​​drive wheel 411 begins to disengage from the second meshing tooth 33 of propulsion unit 30. When the first meshing tooth 413 of the engagement area of ​​drive wheel 411 disengages from the second meshing tooth 33 of propulsion unit 30, propulsion unit 30 is in the second position, and impact unit 20 is in the transition position. At this time, under the action of reset unit 60, propulsion unit 30 moves from the second position to the first position until it returns to the initial position. Crank 412 and impact unit 20 are in a coupled state, and crank 412 drives impact unit 20 to move from the transition position to the energy storage position until impact unit 20 is in the energy storage position. When crank 412 disengages from impact unit 20, impact unit 20, under the action of impact energy released by energy storage unit 10, drives fastener into workpiece along the first direction X. The crank 412 includes a retaining shaft 414 and a bushing 415 fitted onto the retaining shaft 414. The impact unit 20 includes a protrusion 22. The retaining shaft 414 and the bushing 415 engage with the protrusion 22 of the impact unit 20 as meshing parts. The bushing 415 serves to reduce friction and is not essential for achieving the meshing function.

[0056] The propulsion unit 30 and the drive wheel 411 are arranged opposite each other along a second direction. The propulsion unit 30 includes a meshing tooth area. In the second direction, the reset unit 60 is located on the side of the meshing tooth area of ​​the propulsion unit 30 facing away from the drive wheel 411. The second direction is perpendicular to the first direction. The reset unit 60 and the impact unit 20 are arranged along a third direction Z, which is perpendicular to the first direction X and the second direction Y.

[0057] Specifically, the reduction mechanism 42 is a gear transmission mechanism, used to reduce speed and increase torque. The gear transmission mechanism includes one or more stages of planetary gear transmission; in this application, it includes a three-stage planetary gear transmission. The gear transmission mechanism includes a one-way clutch, ensuring that when the drive mechanism 41 is coupled to the propulsion unit 30 or the impact unit 20 and the motor 43 does not provide torque, the force released by the energy storage unit 10 cannot reverse the drive mechanism 41. The speed and torque output by the motor 43 are transmitted to the output shaft 410 via the gear transmission mechanism, and the drive wheel 411 and crank 412 can rotate together with the output shaft 410. A snap ring is attached to the output shaft 410 to prevent the drive wheel 411 and crank 412 from disengaging from the output shaft 410. The drive wheel 411 drives the propulsion unit 30 from the initial position to the second position, and the crank 412 drives the impact unit 20 from the transition position to the energy storage position. The crank 412 is coupled or decoupled from the impact unit 20. The crank 412 has a coupled state and a decoupled state with the impact unit 20. When the impact unit 20 is decoupled from the crank 412, the impact unit 20 drives the fastener into the workpiece under the action of the impact energy released by the energy storage unit 10.

[0058] The support unit 50 also includes a guide rail 54, which is mounted on the base 51. The guide rail 54 has two grooves, in which the impact unit 20 and the propulsion unit 30 are respectively mounted. The two grooves guide the impact unit 20 and the propulsion unit 30, allowing them to move in a straight line. The support unit 50 also includes a first buffer 70 mounted on the fastener guide plate 52. When the propulsion unit 30 returns to its initial position under the action of the reset unit 60, the propulsion unit 30 abuts against the first buffer 70. The first buffer 70 is mounted on the fastener guide plate 52 to absorb the impact energy of the propulsion unit 30 during reset, as well as possible impacts from the impact unit 20 on the propulsion unit 30. At the same time, the first buffer 70 also limits the distance the propulsion unit 30 can move along the first direction X. The support unit 50 also includes a second buffer 80 mounted between the base 51 and the piston 12. During the process of the impact unit 20 driving the energy storage unit 10 to store energy, the impact unit 20 pushes the piston 12 to move away from the second buffer 80. During the process of impact unit 20 receiving energy released by energy storage unit 10 to drive the fastener into the workpiece, piston 12 pushes impact unit 20 towards the second buffer 80 until piston 12 impacts the second buffer 80. When impact unit 20 completes the fastener driving action, the remaining energy of piston 12 will be absorbed or dissipated by the second buffer 80. This design avoids damage to impact unit 20. At the same time, the second buffer 80 also limits the distance that impact unit 20 can move along the first direction X.

[0059] Please combine Figure 10 The states a, b, c, d, e, f, g, and h are given. States a through h correspond to one work cycle.

[0060] State a represents the initial state of the entire working cycle. At this time, the impact unit 20 is in the pre-compression position, and the piston 12 is in the position of approaching but not yet reaching the target. Figure 3 The position indicated by the dashed line. The protrusion 22 of the impact unit 20 engages with the meshing part of the crank 412 (i.e., the retaining shaft 414 and the bushing 415). At this time, the propulsion unit 30 returns to its initial position and is in close contact with the first buffer 70. The output shaft 410 rotates counterclockwise, as shown in state b. The output shaft 410 drives the drive wheel 411 and the crank 412 to rotate. The crank 412 drives the impact unit 20 to move in the opposite direction of the first direction X. The impact unit 20 pushes the piston 12 to move in the opposite direction of the first direction X. Figure 3 The position is indicated by the dashed line. The output shaft 410 continues to rotate counterclockwise, as shown in state c. The impact unit 20 disengages from the crank 412, and under the force released by the energy storage unit 10, the impact unit 20 moves along the first direction X to drive the fastener into the workpiece. After the fastener driving action is completed, the impact unit 20, along with the piston 12, remains at... Figure 3The solid line indicates the position. The output shaft 410 drives the drive wheel 411 and crank 412 to continue rotating counterclockwise. The first meshing tooth 413 of the engagement area of ​​the drive wheel 411 is about to mesh with the second meshing tooth 33 of the propulsion unit 30, as shown in state d.

[0061] The output shaft 410 continues to rotate counterclockwise. As shown in state e, the first meshing tooth 413 of the engagement area of ​​the drive wheel 411 engages with the second meshing tooth 33 of the propulsion unit 30. The drive wheel 411 drives the propulsion unit 30 to move from the initial position to the first position, so that the propulsion unit 30 engages with the impact unit 20 which is in the release position at the first position (i.e., the groove 31 of the propulsion unit 30 engages with the pin 21 of the impact unit 20). The output shaft 410 continues to rotate counterclockwise. As shown in state f, the output shaft 410 drives the drive wheel 411 and the crank 412 to rotate. The drive wheel 411 drives the propulsion unit 30 to move. The propulsion unit 30 pushes the impact unit 20 to move. The impact unit 20 pushes the piston 12 to move in the opposite direction of the first direction X to compress the air spring. The output shaft 410 continues to rotate counterclockwise. As shown in state g, the meshing part of the crank 412 (i.e., the retaining shaft 414 and the bushing 415) begins to mesh with the protrusion 22 of the impact unit 20. At the same time, the first meshing tooth 413 of the drive wheel 411 is about to disengage from the second meshing tooth 33 of the propulsion unit 30. The output shaft 410 continues to rotate counterclockwise. As shown in state h, the first meshing tooth 413 of the drive wheel 411 disengages from the second meshing tooth 33 of the propulsion unit 30. At this time, the propulsion unit 30 is in the second position. The propulsion unit 30 is about to move from the second position to the first position under the action of the reset unit 60 until it is reset to the initial position and close to the first buffer 70, that is, the propulsion unit 30 returns to the initial position. At the same time, the impact unit 20 is in the transition position. The crank 412 continues to drive the impact unit 20 to move from the transition position to the energy storage position. The impact unit 20 pushes the piston 12 to move to compress the air spring. The output shaft 410 continues to rotate counterclockwise, causing the crank 412 to drive the impact unit 20 to the preload position and then stop, as shown in state a, thus completing the working cycle.

[0062] Please combine Figure 11When the fastener gets stuck for some reason, it gets stuck in the fastener guide plate 52. At this time, the impact unit 20 may stop at any position along the first direction X, as shown in state i. Since the propulsion unit 30 and the impact unit 20 are not fixedly connected, the propulsion unit 30 can return to its initial position and press against the first buffer 70 under the action of the reset unit 60. Therefore, the first meshing tooth 413 of the mating area of ​​the drive wheel 411 can correctly mesh with the second meshing tooth 33 of the propulsion unit 30. The output shaft 410 continues to rotate counterclockwise. As shown in state j, the first meshing tooth 413 of the mating area of ​​the drive wheel 411 is about to mesh with the second meshing tooth 33 of the propulsion unit 30. The output shaft 410 continues to rotate counterclockwise. As shown in state k, the first meshing tooth 413 of the mating area of ​​the drive wheel 411 meshes with the second meshing tooth 33 of the propulsion unit 30. The drive wheel 411 drives the propulsion unit 30 to move from the initial position to the first position. The output shaft 410 continues to rotate counterclockwise. As shown in state l, the first meshing tooth 413 of the engagement area of ​​the drive wheel 411 engages with the second meshing tooth 33 of the propulsion unit 30. The drive wheel 411 continues to drive the propulsion unit 30 to move in the opposite direction of the first direction X until the propulsion unit 30 re-engages with the impact unit 20. The output shaft 410 continues to rotate counterclockwise. As shown in state g, the drive wheel 411 drives the propulsion unit 30 to move in the opposite direction of the first direction X. The propulsion unit 30 pushes the impact unit 20 to move in the opposite direction of the first direction X. The impact unit 20 pushes the piston 12 to move in the opposite direction of the first direction X to compress the air spring. The engagement part of the crank 412 (i.e., the retaining shaft 414 and the bushing 415) begins to engage with the protrusion 22 of the impact unit 20. At the same time, the first meshing tooth 413 of the drive wheel 411 is about to disengage from the second meshing tooth 33 of the propulsion unit 30. The output shaft 410 continues to rotate counterclockwise. As shown in state h, the meshing part of the crank 412 (i.e., the retaining shaft 414 and the bushing 415) engages with the protrusion 22 of the impact unit 20. The first meshing tooth 413 of the mating area of ​​the drive wheel 411 disengages from the second meshing tooth 33 of the propulsion unit 30. At this time, the propulsion unit 30 is in the second position. The propulsion unit 30 will move from the second position to the first position under the action of the reset unit 60 until it is reset to the initial position and close to the first buffer 70, that is, the propulsion unit 30 returns to the initial position. At the same time, the impact unit 20 is in the transition position. The crank 412 continues to drive the impact unit 20 from the transition position to the energy storage position. The impact unit 20 pushes the piston 12 to move in the opposite direction of the first direction X to compress the air spring. The output shaft 410 continues to rotate counterclockwise, so that the crank 412 drives the impact unit 20 to the pre-compression position and then stops, as shown in state a, completing the working cycle.

[0063] Please combine Figures 12 to 14The second embodiment of this application also provides a fastener driving machine, which includes an energy storage unit 10, an impact unit 20, a propulsion unit 30, a drive unit 40, a support unit 50, and a reset unit 60. The support unit 50 supports the energy storage unit 10, the impact unit 20, the propulsion unit 30, and the drive unit 40. 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 an air spring, which includes a cylinder 11, a piston 12, and a sealing ring 13. The cylinder 11 and the piston 12 form a closed space containing gas, and the cylinder 11 and the piston 12 are sealed by the sealing ring 13. One end of the impact unit 20 is connected to the piston 12, and the other end of the impact unit 20 is used to drive the fastener into the workpiece. The impact unit 20 can move together with the piston 12. The energy storage unit 10 is used to store impact energy. When the energy storage unit 10 releases impact energy, the impact unit 20 receives the energy released by the energy storage unit 10 and drives the fastener into the workpiece along the first direction X. The impact unit 20 has an energy storage position and a release position. The propulsion unit 30 pushes the impact unit 20 from the release position to the energy storage position. The propulsion unit 30 has a first position corresponding to the release position and a second position corresponding to the energy storage position. The drive unit 40 is coupled or decoupled from the propulsion unit 30. The drive unit 40 has a coupled state and a decoupled state with the propulsion unit 30. The reset unit 60 provides a reset force for the propulsion unit 30 to move from the second position to the first position until it is reset to the initial position. Under the combined action of the force released by the energy storage unit 10 and the reset force of the reset unit 60, the propulsion unit 30 moves from the second position to the first position until it is reset to the initial position. The drive unit 40 includes a motor 43, an output shaft 410, a reduction mechanism 42, and a drive mechanism 41. The motor provides power to the drive mechanism. The drive mechanism 41 includes a drive wheel 411 sleeved and mounted on the output shaft 410. The drive wheel 411 includes a mating area and a non-matting area arranged along the circumference. The mating area meshes with the teeth of the propulsion unit 30 to form a meshing state.

[0064] In this embodiment, the drive mechanism 41 includes only the drive wheel 411 and not the crank. The impact unit 20 has no protrusion, and there is no meshing relationship between the impact unit 20 and the drive mechanism 41. When the output shaft 410 drives the drive wheel 411 to rotate, the drive wheel 411 drives the propulsion unit 30 to move from the initial position to the first position. The propulsion unit 30 can cooperate with the impact unit 20 in the first position, so that the drive wheel 411 indirectly pushes the impact unit 20 to move from the release position to the energy storage position through the propulsion unit 30. The impact unit 20 pushes the piston 12 to move in the opposite direction of the first direction X to compress the air spring. After the impact unit 20 is driven to the energy storage position (i.e., the piston 12 is pushed to the top dead center), the drive wheel 411 discouples from the propulsion unit 30. Under the force released by the energy storage unit 10, the impact unit 20 moves along the first direction X, that is, the impact unit 20 moves from the energy storage position to the release position. At the same time, under the combined action of the force released by the energy storage unit 10 and the reset force of the reset unit 60, the propulsion unit 30 moves along the first direction X, that is, the propulsion unit 30 moves from the second position to the first position until it is reset to the initial position. Since the propulsion unit 30 and the impact unit 20 are not fixedly connected, the propulsion unit 30 will disengage from the impact unit 20 during the process of the propulsion unit 30 moving from the second position to the first position until it is reset to the initial position. Preferably, the propulsion unit 30 will disengage from the impact unit 20 during the process of the propulsion unit 30 moving from the second position to the first position. Compared with the first embodiment, the second embodiment has the advantage of a simplified structure, but the disadvantage is that the propulsion unit 30 will take away a portion of the energy released by the energy storage unit 10, reducing the efficiency of the entire mechanism.

[0065] Please combine Figure 13 The states a, b, c, d, e, and f are given. States a through f correspond to one work cycle.

[0066] State a represents the initial state of the entire working cycle. At this time, the impact unit 20 is in the preload position, and the first meshing tooth 413 of the engagement area of ​​the drive wheel 411 is engaged with the second meshing tooth 33 of the propulsion unit 30 (i.e., rack). The propulsion unit 30 and the impact unit 20 are also engaged. The output shaft 410 rotates counterclockwise, as shown in state b. The output shaft 410 drives the drive wheel 411 to rotate, and the drive wheel 411 drives the propulsion unit 30 to move from the first position to the second position (i.e., move in the opposite direction of the first direction X). The propulsion unit 30 pushes the impact unit 20 to move in the opposite direction of the first direction X, and the impact unit 20 pushes the piston 12 to move until it reaches the top dead center. The output shaft 410 continues to rotate counterclockwise. As shown in state c, the propulsion unit 30 disengages from the drive wheel 411. The impact unit 20 moves along the first direction X under the force released by the energy storage unit 10, and the propulsion unit 30 moves along the first direction X under the combined action of the force released by the energy storage unit 10 and the reset force of the reset unit 60. As shown in state d, the impact unit 20 drives the fastener into the workpiece, while the propulsion unit 30 returns to its initial position and is in close contact with the first buffer 70 under the combined action of the force released by the energy storage unit 10 and the reset force of the reset unit 60. After the fastener driving action is completed, the piston 12 is in close contact with the second buffer 80. The output shaft 410 drives the drive wheel 411 to continue rotating counterclockwise. The first meshing tooth 413 of the mating area of ​​the drive wheel 411 is about to mesh with the second meshing tooth 33 of the propulsion unit 30, as shown in state e.

[0067] The output shaft 410 continues to rotate counterclockwise. As shown in state f, the first meshing tooth 413 of the engagement area of ​​the drive wheel 411 engages with the second meshing tooth 33 of the propulsion unit 30. The drive wheel 411 drives the propulsion unit 30 to move from the initial position to the first position. At the first position, the propulsion unit 30 engages with the impact unit 20, which is in the release position (i.e., the groove 31 of the propulsion unit 30 engages with the pin 21 of the impact unit 20). The output shaft 410 continues to rotate counterclockwise, driving the drive wheel 411 to rotate. The drive wheel 411 drives the propulsion unit 30 to move in the opposite direction of the first direction X. The propulsion unit 30 pushes the impact unit 20 to move in the opposite direction of the first direction X. The impact unit 20 pushes the piston 12 to move to compress the air spring until it returns to state a, completing the entire working cycle.

[0068] Please combine Figure 14When the fastener jams for some reason, it gets stuck in the fastener guide plate 52. At this time, the impact unit 20 may stop at any position along the first direction X, as shown in state g. Since the propulsion unit 30 (i.e., rack) is not fixedly connected to the impact unit 20, the propulsion unit 30 can return to its initial position and press against the first buffer 70 under the action of the reset force of the reset unit 60 and the energy distributed from the energy storage unit 10. Therefore, the first meshing tooth 413 of the mating area of ​​the drive wheel 411 can again correctly mesh with the second meshing tooth 33 of the propulsion unit 30. The output shaft 410 continues to rotate counterclockwise, as shown in state h, and the first meshing tooth 413 of the mating area of ​​the drive wheel 411 is about to mesh with the second meshing tooth 33 of the propulsion unit 30. The output shaft 410 continues to rotate counterclockwise. As shown in state i, the first meshing tooth 413 of the engagement area of ​​the drive wheel 411 engages with the second meshing tooth 33 of the propulsion unit 30. The drive wheel 411 drives the propulsion unit 30 to move from the initial position to the first position, that is, the drive wheel 411 drives the propulsion unit 30 to move in the opposite direction of the first direction X. The output shaft 410 continues to rotate counterclockwise. As shown in state j, the first meshing tooth 413 of the engagement area of ​​the drive wheel 411 engages with the second meshing tooth 33 of the propulsion unit 30. The drive wheel 411 continues to drive the propulsion unit 30 to move in the opposite direction of the first direction X until the propulsion unit 30 re-engages with the impact unit 20 at the first position. The output shaft 410 continues to rotate counterclockwise, driving the drive wheel 411 to rotate. The drive wheel 411 drives the propulsion unit 30 to move in the opposite direction of the first direction X. The propulsion unit 30 pushes the impact unit 20 to move in the opposite direction of the first direction X. The impact unit 20 pushes the piston 12 to move in the opposite direction of the first direction X to compress the air spring and return to the initial state a.

[0069] In this application, the drive unit 40 can indirectly engage with the impact unit 20 through the propulsion unit 30, and the propulsion unit 30 can return to the initial position independently through the reset unit 60. When the impact unit 20 stops at an abnormal position due to a jamming pin, the drive unit 40 can always correctly engage with the propulsion unit 30 and drive the propulsion unit 30 to the abnormal position where the impact unit 20 is stopped, thereby enabling the propulsion unit 30 to re-engage with the impact unit 20 correctly.

[0070] 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 driving machine, characterized in that, The fastener driving machine includes: Energy storage unit, used to store strike energy; An impact unit receives energy from the energy storage unit and drives the fastener into the workpiece along a first direction. The impact unit has an energy storage position, a transition position, and a release position. A propulsion unit, in cooperation with the impact unit, is used to push the impact unit from the release position to the transition position. The propulsion unit has a first position corresponding to the release position and a second position corresponding to the transition position. A drive unit is coupled to or decoupled from the propulsion unit, and the drive unit has a coupled state and a decoupled state with the propulsion unit; A reset unit provides a reset force for the propulsion unit as it moves from the second position to the first position; and when the propulsion unit moves from the second position to the first position, the impact unit disengages from the propulsion unit at the transition position. The impact unit includes a protrusion, the drive unit includes a drive mechanism, the drive mechanism includes a meshing part, the meshing part meshes with the protrusion to drive the impact unit to move from the transition position to the energy storage position.

2. The fastener driving machine according to claim 1, characterized in that, The reset unit extends along the direction of motion of the impact unit.

3. The fastener driving machine according to claim 2, characterized in that, The fastener driving machine also includes a support unit, which supports the energy storage unit, the impact unit, the propulsion unit and the drive unit; The reset unit has a first end and a second end arranged in opposite directions. The first end is connected to the support unit, and the second end is connected to the propulsion unit.

4. The fastener driving machine according to claim 2, characterized in that, The reset unit is a tension spring, and when the push unit is in the second position, the reset unit is in a stretched state.

5. The fastener driving machine according to claim 1, characterized in that, The drive unit further includes a motor that provides power to the drive mechanism, and the drive mechanism further includes a drive wheel that includes a mating area and a non-matting area arranged along the circumference. The mating area engages with the teeth of the propulsion unit to form a meshing state.

6. The fastener driving machine according to claim 1, characterized in that, The driving mechanism includes a driving wheel, and the propulsion unit is disposed opposite to the driving wheel along a second direction; the propulsion unit includes a meshing tooth area, and in the second direction, the reset unit is located on the side of the meshing tooth area opposite to the driving wheel, and the second direction is perpendicular to the first direction.

7. The fastener driving machine according to claim 6, characterized in that, The reset unit and the impact unit are arranged along a third direction, which is perpendicular to the first direction and the second direction.

8. The fastener driving machine according to claim 1, characterized in that, The propulsion unit includes a groove that is open in the opposite direction to the first direction, and the impact unit includes a protrusion that mates with the groove. During the movement of the propulsion unit from the first position to the second position, the protrusion is located in the groove, and the impact unit is pushed by the propulsion unit in the opposite direction of the first direction; When the propulsion unit moves from the second position to the first position, the groove disengages from the protrusion.

9. The fastener driving machine according to claim 5, characterized in that, The engaging portion engages with or disengages from the protrusion, and the engaging portion has an engaged state and a disengaged state with the protrusion; when the protrusion is in the disengaged state, the impact unit drives the fastener into the workpiece under the impact energy released by the energy storage unit.

10. The fastener driving machine according to claim 9, characterized in that, After the mating area disengages from the propulsion unit, the meshing part and the protrusion are in a meshing state. The meshing part and the protrusion mesh to drive the impact unit to move from the transition position to the energy storage position.

11. The fastener driving machine according to claim 1, characterized in that, The fastener driving machine also includes a buffer component, and the pushing unit abuts against the buffer component after being reset by the reset unit.

12. The fastener driving machine according to claim 1, characterized in that, The drive mechanism includes a crank, and the crank includes the engagement portion.

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