Fastener driving machine

Abstract

To provide a fastener driving device.SOLUTION: A fastener driving device includes an energy storage unit, an impact unit, a transmitting unit and a driving unit. The energy storage unit has an energy storage state and an energy release state. The impact unit moves in a first direction to drive a fastener into a workpiece. The transmitting unit connects the energy storage unit with the impact unit. The driving unit is capable of cooperating with the impact unit. During a transition of the energy storage unit from the energy release state to the energy storage state, the driving unit drives the impact unit to move in a second direction different from the first direction, the impact unit drives the energy storage unit to store energy through the transmitting unit; during a transition of the energy storage unit from the energy storage state to the energy release state, the energy storage unit releases energy along the second direction to drive the transmitting unit, the transmitting unit drives the impact unit to move along the first direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to the field of power tools, and more particularly to fastener driving tools. [Background technology]

[0002] Generally, fastener drivers include an energy storage device, which includes a spring. The fastener driver compresses the spring to store energy and then quickly releases the spring to perform external work, i.e., to drive a fastener into a workpiece. Specifically, conventional fastener drivers compress the spring in a first direction to store energy, and then quickly release the spring in a second direction to drive the fastener into the workpiece in the second direction. In this case, the first and second directions are opposite directions. As described above, fastener drivers that use a spring to store and release energy typically have the disadvantage of large recoil, meaning that the recoil acting on the fastener driver's body, particularly the handle, is large, resulting in a large recoil force felt by the user.

[0003] Therefore, there is a need to provide a new fastener driver. Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an object of the present invention is to provide a fastener driving tool that operates stably and smoothly. [Means for solving the problem]

[0005] Specifically, the present invention provides a fastener driver including: an energy storage device having an energy storage state and an energy release state; The impact device moves in the first direction to drive the fastener into the workpiece; a transmission device connecting the energy storage device and the impact device; a drive device, capable of cooperating with said impact device; During the process of the energy storage device switching from the release state to the energy storage state, the drive device moves the impact device along a second direction different from the first direction, and the impact device drives the energy storage device via the transmission device to store energy; during the process of the energy storage device switching from the energy storage state to the release state, the energy storage device releases energy along the second direction to drive the transmission device, and the transmission device moves the impact device along the first direction.

[0006] Furthermore, the first direction and the second direction are opposite directions.

[0007] Furthermore, when the energy storage device is in an energy storing state, the impact device is at least partially located within the energy storage device.

[0008] Furthermore, during the process of the energy storage device switching from the released state to the energy storage state, the driving device cooperates with the impact device, and the driving device moves the impact device along the second direction different from the first direction; during the process of the energy storage device switching from the energy storage state to the released state, the driving device releases cooperation with the impact device, and the energy storage device releases energy along the second direction to drive the transmission device, and the transmission device moves the impact device along the first direction.

[0009] Furthermore, the transmission device includes a transmission belt, and the transmission belt is connected between the energy storage device and the impact device.

[0010] The transmission device further includes a fixed pulley, the transmission belt is attached to the fixed pulley, the energy storage device includes a spring, the spring has a fixed end and a movable end, the movable end is movable relative to the fixed end, the movable end and the impact device are connected via the transmission device, and the moving direction of the movable end is different from the moving direction of the impact device.

[0011] Further, the energy storage device includes a spring, the spring having a fixed end and a movable end, the movable end being movable relative to the fixed end, the movable end moving along the second direction to release energy, and the movable end moving along the first direction to store energy.

[0012] Furthermore, the energy storage device also includes a partition plate and an end cap, the fixed end is fixed to the partition plate, the movable end is accommodated in an accommodating space formed by the end cap, and the end cap moves together with the movable end.

[0013] Furthermore, the transmission device includes a transmission belt, and the transmission belt is connected between the end cap and the impact device.

[0014] Furthermore, the fastener driver includes a first fixing plate, a second fixing plate, and a fixing tool, the transmission belt includes a central portion and two end portions located on either side of the central portion, the central portion includes a main portion and two connecting portions located on either side of the main portion, the connecting portions are connected between the main portion and the end portions, the connecting portions include adjacent first and second connecting portions, the first connecting portion is sandwiched between the end cap and the first fixing plate, the second connecting portion is sandwiched between the first fixing plate and the second fixing plate, the end portions are sandwiched between the main portion and the second fixing plate, and the fixing tool secures the end cap, the first fixing plate, and the second fixing plate together.

[0015] Further, the drive device includes a first engagement mechanism, the impact device includes a second engagement mechanism, the first engagement mechanism periodically engages or disengages with the second engagement mechanism, when the first engagement mechanism engages with the second engagement mechanism, the drive device moves the impact device along the second direction, when the first engagement mechanism disengages from the second engagement mechanism, the energy storage device releases energy along the second direction to drive the transmission device, and the transmission device moves the impact device along the first direction.

[0016] Furthermore, the first meshing mechanism includes an output shaft, a first cam, and a second cam, the first cam and the second cam are attached to the output shaft and rotate together with the output shaft, the first cam and the second cam are provided offset in position along the axial direction of the output shaft, the second meshing mechanism includes a first meshing portion and a second meshing portion, the first cam periodically meshes with or disengages from the first meshing portion during the rotation of the output shaft, and the second cam periodically meshes with or disengages from the second meshing portion during the rotation of the output shaft.

[0017] Furthermore, the first cam meshes with the first meshing portion, and the driving device moves the impact device along the second direction, the second cam meshes with the second meshing portion, and the driving device moves the impact device along the second direction; during one rotation cycle of the output shaft, the first cam has a rotation angle of less than 180° when meshed with the first meshing portion, and the second cam has a rotation angle of less than 180° when meshed with the second meshing portion. Furthermore, the impact device includes a driving pin and a drive wheel connected to the second engagement mechanism, the driving pin is used to drive the fastener into the workpiece, the drive wheel is attached to the second engagement mechanism via a pin, and the drive wheel is rotatable around the pin.

[0018] Furthermore, the transmission device includes a transmission belt, and the transmission belt is connected between the energy storage device and the drive wheels.

[0019] Furthermore, the fastener driving tool includes a guide rail, and the impact device moves along the guide rail; the fastener driving tool further includes a first base connected to the guide rail and a first buffer member attached to the first base, and after the impact device moves along the first direction and drives the fastener into the workpiece, the impact device collides with the first buffer member. Furthermore, the fastener driving tool includes a guide rail that passes through the spring and the end cap in the direction of expansion and contraction of the spring; the fastener driving tool further includes a second base connected to the guide rail and a second buffer member attached to the second base, and after the impact device moves along the first direction to drive the fastener into the workpiece, the end cap collides with the second buffer member. [Effects of the Invention]

[0020] In this invention, the fastener driver includes an energy storage device, a transmission device, an impact device, and a drive device. The energy storage device releases energy in a second direction and moves the impact device along a first direction different from the second direction via the transmission device. The impact device moves along the first direction to drive the fastener into the workpiece, with the energy release direction (i.e., the second direction) different from the fastener driving direction (i.e., the first direction). By utilizing the balance of momentum, the recoil of the fastener driver is significantly reduced and the user experience is improved. Furthermore, when the energy storage device switches from the release state to the energy storage state, the drive device moves the impact device along the second direction, and the impact device drives the energy storage device via the transmission device to store energy. When the energy storage device is in the energy storage state, the impact device is at least partially located inside the energy storage device, eliminating the need for deflection of the drive device. This design significantly reduces the offset load of the drive device and simultaneously shortens the overall length. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a schematic structural diagram of the fastener driving machine of the present invention. [Figure 2] FIG. 2 is a structural schematic diagram of the drive device shown in FIG. [Figure 3] FIG. 3 is a cross-sectional view of the drive device shown in FIG. 2 taken along CC. [Figure 4] FIG. 4 is a structural schematic diagram of the first and second meshing mechanisms shown in FIG. [Figure 5] FIG. 5 is a schematic diagram of a partial structure of the fastener driving machine shown in FIG. [Figure 6] FIG. 6 is a cross-sectional view taken along CC of the partial structure shown in FIG. [Figure 7] FIG. 7 is a cross-sectional view taken along the line DD of the partial structure shown in FIG. [Figure 8] FIG. 8 is a schematic diagram of one of the various states during the operating cycle of the fastener driver of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0022] Exemplary embodiments will now be described in detail, examples of which are illustrated in the drawings. In the following description, unless otherwise specified, the same numerals in different drawings refer to the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention.

[0023] The terms used herein are used only for the purpose of describing particular embodiments and are not intended to limit the present invention. Unless otherwise defined, technical and scientific terms used herein have their ordinary meanings as understood by those of ordinary skill in the art. Terms such as "first" and "second" used herein do not denote order, quantity, or importance, but are used to distinguish between different components. Similarly, terms such as "one" or "one" do not denote a limitation of quantity, but rather indicate the presence of at least one. "Plural" or "several" indicate two or more. Unless otherwise specified, terms such as "front," "rear," "lower," and "upper" are used for convenience of description and do not limit position or spatial orientation. Terms such as "comprise" and "include" include the elements or items listed after "comprise" or "include," as well as equivalent elements or items, and do not exclude other elements or items. Terms such as "connect" and "couple" are not limited to physical or mechanical connections, but may include direct or indirect electrical connections. As used in this specification and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. Also, as used herein, the term "and / or" is meant to include any and all possible combinations of the associated listed items.

[0024] Please refer to Figures 1 to 8. The present invention provides a fastener driving machine 100, which includes a machine shell 101 and an energy storage device 10, an impact device 20, a transmission device 30, and a drive device 40 installed within the machine shell 101, with the transmission device 30 connected to the energy storage device 10 and the impact device 20. The fastener driving machine 100 further includes a fastener guide plate 50 and a fastener storage clip 60, which is connected to the fastener guide plate 50 and stores fasteners (not shown in the figures). The fastener storage clip 60 feeds fasteners toward the fastener guide plate 50, which serves to guide the fasteners, and the fasteners are driven into the workpiece by the impact device 20. In this invention, the fasteners are nails, the fastener guide plate 50 is a guide plate, and the fastener storage clip 60 is a nail clip.

[0025] In the present invention, the impact device 20 moves along a first direction to drive a fastener into a workpiece. The energy storage device 10 has an energy storage state and a release state. When the energy storage device 10 switches from the release state to the energy storage state, the drive device 40 cooperates with the impact device 20, causing the impact device 20 to move along a second direction different from the first direction, and the impact device 20 drives the energy storage device 10 via the transmission device 30 to store energy. Specifically, the impact device 20 drives the transmission device 30, which drives the energy storage device 10 to store energy. When the energy storage device 10 switches from the energy storage state to the release state, the drive device 40 disengages from the cooperation with the impact device 20, causing the energy storage device 10 to release energy in the second direction to drive the transmission device 30, which causes the impact device 20 to move along the first direction to drive a fastener into the workpiece. In the present invention, the second direction is opposite to the first direction, the stored energy state indicates that the energy storage device 10 has finished storing energy, and the released state indicates that the energy storage device 10 has finished releasing energy. When the energy storage device 10 is in the stored energy state, the impact device 20 is at least partially located inside the energy storage device 10, and this design shortens the overall length of the fastener driver 100.

[0026] In the present invention, the energy storage device 10 releases energy in the second direction, and the transmission device 30 moves the impact device 20 in the first direction opposite to the second direction, driving the fastener into the workpiece. With this design, the energy release direction (i.e., the second direction) is opposite to the fastener driving direction (i.e., the first direction), and the momentum balance is utilized to significantly reduce the recoil of the fastener driving tool 100, especially the handle, improving the user experience.

[0027] The energy storage device 10 is a medium that stores energy through a change in displacement, such as an air spring, a mechanical spring, a rubber element, or a vacuum. In the present invention, the energy storage device 10 includes a spring 11, a partition plate 12, and an end cap 13. The spring 11 is disposed between the end cap 13 and the partition plate 12. The partition plate 12 is fixedly mounted within the aircraft shell 101. When the energy storage device 10 is in a released state, the partition plate 12 is disposed between the spring 11 and the impact device 20. When the energy storage device 10 is in an energy storage state, the impact device 20 is at least partially located within the spring 11. The spring 11 includes a fixed end 111 and a movable end 112, and the movable end 112 is movable relative to the fixed end 111. The fixed end 111 of the spring 11 is fixed to the partition plate 12, and the movable end 112 of the spring 11 is accommodated in an accommodation space 130 formed by the end cap 13. Specifically, the end cap 13 includes a cylindrical tube portion 131, which has the above-mentioned accommodating space 130, and a portion of the movable end 112 of the spring 11 is accommodated in the above-mentioned accommodating space 130. The end cap 13 guides the movement of the movable end 112 of the spring 11, and the end cap 13 moves together with the movable end 112 of the spring 11. The movable end 112 of the spring 11 moves along the second direction to release energy, and the movable end 112 of the spring 11 moves along the first direction to store energy. Specifically, when the energy storage device 10 switches from the energy storage state to the release state, the movable end 112 of the spring 11 moves along the second direction to release energy, causing the spring 11 to move the end cap 13 along the second direction, which drives the transmission device 30, which causes the impact device 20 to move along the first direction. When the energy storage device 10 switches from the released state to the stored energy state, the driving device 40 moves the impact device 20 in the second direction, the impact device 20 drives the transmission device 30, the transmission device 30 moves the end cap 13 in the first direction, and the end cap 13 moves the movable end 112 of the spring 11 in the first direction to store energy. The movable end 112 of the spring 11 and the impact device 20 are linked via the transmission device 30, and the moving direction of the movable end 112 of the spring 11 is different from the moving direction of the impact device 20.

[0028] The driving device 40 includes a motor 41, a gear transmission mechanism 42, and a first meshing mechanism 43. The gear transmission mechanism 42 is connected between the motor 41 and the first meshing mechanism 43. The first meshing mechanism 43 includes a rotatable output shaft 430, a first cam 431, and a second cam 432. The first cam 431 and the second cam 432 are attached to the output shaft 430 and rotate together with the output shaft 430. The first cam 431 and the second cam 432 are offset from each other along the axial direction of the output shaft 430. The first meshing mechanism 43 further includes a nut 433 and a snap ring 434. The first cam 431 is fixed to the output shaft 430 by the nut 433, and the second cam 432 is fixed to the output shaft 430 by the snap ring 434. The motor 41 provides torque and rotational speed, which are output through the gear transmission mechanism 42. The gear transmission mechanism 42 reduces the rotational speed while increasing the torque. The gear transmission mechanism 42 may include a single-stage or multi-stage planetary gear transmission. In the present invention, the gear transmission mechanism 42 includes a three-stage planetary gear transmission. The torque and rotational speed output from the motor 41 are transmitted to the output shaft 430 of the first meshing mechanism 43 through the gear transmission mechanism 42, and the output shaft 430 is supported by a bearing 435 and a sleeve 436. The bearing 435, sleeve 436, and gear transmission mechanism 42 are all disposed within a gearbox. Note that the gear transmission mechanism 42 is not essential; if the torque output from the motor 41 is sufficiently large, the motor shaft can be directly used as the output shaft 430 of the first meshing mechanism 43.

[0029] The impact device 20 includes a second engagement mechanism 23 and a driving pin 21 and a driving wheel 22 connected to the second engagement mechanism 23. The second engagement mechanism 23 includes a base 230 and a first engagement portion 231 and a second engagement portion 232 mounted on the base 230. The base 230 is connected to the driving pin 21 by a pin, and the two move together. The driving pin 21 is used to drive fasteners into the workpiece. The driving wheel 22 is attached to the base 230 via a pin and can rotate around the pin. The driving wheel 22 is connected to the transmission device 30 and drives the energy storage of the energy storage device 10. The base 230 can also be designed to be directly connected to the transmission device 30. Therefore, the driving wheel 22 is not essential for overall functionality. In the present invention, the installation of the driving wheel 22 reduces friction caused by force imbalance. In the present invention, the first engagement portion 231 is the first card shaft, and the second engagement portion 232 is the second card shaft. The first cam 431 meshes with the first meshing portion (first card shaft) 231, and the second cam 432 meshes with the second meshing portion (second card shaft) 232.

[0030] The first cam 431 and the second cam 432 are arranged offset along the axial direction of the output shaft 430, so that the first cam 431 only meshes with the first meshing portion (first card shaft) 231, and the second cam 432 only meshes with the second meshing portion (second card shaft) 232, and the two do not interfere with each other. A first sleeve is attached to the first meshing portion (first card shaft) 231, and a second sleeve is attached to the second meshing portion (second card shaft) 232, which can reduce the frictional force when they mesh together.

[0031] The transmission device 30 includes a transmission belt 31 and two fixed pulleys 32. The two fixed pulleys 32 are attached to the machine shell 101, and the transmission belt 31 is attached to the two fixed pulleys 32. The transmission belt 31 is connected between the driving wheel 22 of the impact device 20 and the end cap 13 of the energy storage device 10. In the present invention, the fixed pulley 32 is a roller, which can rotate around a roller axis, and the roller axis is attached within the machine shell 101. Therefore, the roller functions as a fixed pulley. In the present invention, the transmission belt 31 is a woven fiber belt. In other embodiments, the transmission belt 31 may be a belt, a wire rope, or another woven fiber rope. By providing the transmission device 30, the moving direction of the movable end 112 of the spring 11 and the moving direction of the impact device 20 are opposite to each other.

[0032] The connection method between the transmission belt 31 and the end caps 13 can be designed differently depending on the type of transmission belt 31 used. In the present invention, the transmission belt 31 is an open-type woven belt, which includes a central portion 311 and two end portions 312. The fastener driver 100 further includes a first fixing plate 71, a second fixing plate 72, and a fastener 73. The transmission belt 31 includes a central portion 311 and two end portions 312 located on either side of the central portion 311. The central portion 311 includes a main portion 313 and two connecting portions 314 located on either side of the main portion 313, and the connecting portions 314 are connected between the main portion 313 and the end portions 312. The connecting portion 314 includes a first connecting portion 315 and a second connecting portion 316 arranged adjacent to each other, the first connecting portion 315 being sandwiched between the end cap 13 and the first fixing plate 71, the second connecting portion 316 being sandwiched between the first fixing plate 71 and the second fixing plate 72, and the end portion 312 being sandwiched between the main body 313 and the second fixing plate 72, the main body 313 passing over the fixed slip ring 32 and connected to the driving wheel 22 of the impact device 20. The fastener 73 fastens the end cap 13, the first fixing plate 71 and the second fixing plate 72 together, and in the present invention, the fastener 73 is a screw.

[0033] Specifically, a labyrinth-type fastening method is adopted between the transmission belt 31 and the end cap 13, in which the transmission belt 31 passes through the gap between the first fastening plate 71 and the end cap 13, then passes through the gap between the second fastening plate 72 and the first fastening plate 71, and finally the end 312 of the transmission belt 31 is placed between the second fastening plate 72 and the main body 313 of the transmission belt 31, and finally the first fastening plate 71 and the second fastening plate 72 are fastened to the end cap 13 by fasteners 73 (screws). The above-mentioned labyrinth-type fastening method increases the contact area between the transmission belt 31 and the fastening parts (i.e., the first fastening plate 71 and the second fastening plate 71). Furthermore, the end 312 of the transmission belt 31 is disposed between the second fixing plate 72 and the main body 313 of the transmission belt 31. When the transmission belt 31 is loosened, the end 312 of the transmission belt 31 moves in the second direction, while the main body 313 of the transmission belt 31 moves in the first direction, with the direction of movement of the main body 313 being opposite to the direction of movement of the end 312 of the transmission belt 31. When the transmission belt 31 is tensioned, a self-locking effect occurs between the main body 313 and the end 312. Therefore, the labyrinth-type fastening method described above significantly increases the force required to loosen the transmission belt 31. In the case of an open-type transmission belt 31, the end 312 of the transmission belt 31 can be connected to the impact device 20, and the central portion 311 of the transmission belt 31 can be connected to the end cap 13 via the fixed pulley 32. In another embodiment, when two open-type transmission belts 31 are used, each end 312 is connected to the end cap 13 and the impact device 20. Also, when a non-opening type circular transmission belt 31 is used, it is only necessary to hang the circular transmission belt 31 on the end cap 13, pass the fixed pulley 32 and connect it to the impact device 20.

[0034] The impact device 20 and spring 11 are arranged along the extension / contraction direction of the spring 11, and the two fixed pulleys 32 are arranged on both sides of the spring 11 along a third direction, which is perpendicular to the extension / contraction direction of the spring 11. With this design, when the impact device 20 moves in the second direction, the movable end 112 of the spring 11 of the energy storage device 10 is compressed in the first direction. Spacers 33 are installed on both sides of the fixed pulleys 32 to restrict the transmission belt 31 and prevent the transmission belt 31 from shifting in the axial direction of the fixed pulleys 32.

[0035] The first engaging mechanism 43 periodically engages and disengages with the second engaging mechanism 23. When the first engaging mechanism 43 engages with the second engaging mechanism 23, the driving device 40 moves the impact device 20 in the second direction, which drives the transmission device 30, which moves the end cap 13 in the first direction. The end cap 13 moves the movable end 112 of the spring 11 in the first direction to store energy. When the first engaging mechanism 43 disengages from the second engaging mechanism 23, the movable end 112 of the spring 11 moves in the second direction, which moves the end cap 13 in the second direction, which drives the transmission device 30, which moves the impact device 20 in the first direction to hammer the fastener into the workpiece. Specifically, the first cam 431 periodically engages with or disengages from the first meshing portion (first card shaft) 231 as the output shaft 430 rotates, and the second cam 432 periodically engages with or disengages from the second meshing portion (second card shaft) 232 as the output shaft 430 rotates. When the first cam 431 engages with the first meshing portion 231, the drive unit 40 moves the impact device 20 in the second direction, and when the second cam 432 engages with the second meshing portion 232, the drive unit 40 moves the impact device 20 in the second direction.

[0036] As the output shaft 430 rotates, the first cam 431 first engages with the first meshing portion 231. After the driving device 40 moves the impact device 20 a certain stroke, the second cam 432 engages with the second meshing portion 232, and immediately afterwards, the first cam 431 disengages from the first meshing portion 231. As the second cam 432 engages with the second meshing portion 232, the driving device 40 continues to move the impact device 20 until the second cam 432 disengages from the second meshing portion 232. Then, the impact device 20 completes its fastener driving operation with the help of the energy released by the energy storage device 10. The first cam 431 and the second cam 432 have specific shapes that convert the rotational motion of the first cam 431 and the second cam 432 into linear motion of the impact device 20. During one rotation cycle of the output shaft 430, the rotation angle of the first cam 431 when it is engaged with the first meshing portion 231 is less than 180°, and the rotation angle of the second cam 432 when it is engaged with the second meshing portion 232 is also less than 180°. Therefore, after the second cam 432 disengages from the second meshing portion 232, there is a period of time after the impact device 20 completes the fastener driving operation before the first cam 431 engages with the first meshing portion 231 again.

[0037] The fastener driving tool 100 further includes two parallel guide rails 80. The guide rails 80 are mounted within the housing 101 and have a long, narrow shape. The impact unit 20 is disposed between the two guide rails 80 and moves along the two guide rails 80, maintaining linear motion. The two guide rails 80 pass through the energy storage unit 10. Specifically, the two guide rails 80 penetrate the end cover 13, the spring 11, and the baffle 12 along the extension / contraction direction of the spring 11. When the energy storage unit 10 switches from the automatic release state to the energy storage state, the drive unit 40 moves the impact unit 20 along the second direction. When the energy storage unit 10 is in the energy storage state, the impact unit 20 is at least partially located inside the spring 11. This design allows the overall length of the fastener driving tool 10 to be shortened.

[0038] The fastener driving machine 100 includes a first base 91 connected to one end of the two guide rails 80 and a second base 92 connected to the other end of the two guide rails 80. The first base 91 is connected to one end of the two guide rails 80 with screws, and the second base 92 is connected to the other end of the two guide rails 80 with screws. Both the first base 91 and the second base 92 are installed within a machine shell 101. The fastener driving machine 100 further includes a first buffer member 93 mounted within the first base 91 and a second buffer member 94 mounted within the second base 92. The fastener guide plate 50 is connected to the first base 91. When the energy storage device 10 releases energy, the movable end 112 of the spring 11 moves the end cap 13 in the second direction, which drives the transmission device 30, which then moves the impact device 20 in the first direction. The impact device 20 passes through the first base 91 and the first buffer member 93 to drive the fasteners in the fastener guide plate 50 into the workpiece. After the impact device 20 moves in the first direction to drive the fasteners into the workpiece, the impact device 20 collides with the first buffer member 93, and the end cap 13 collides with the second buffer member 94.

[0039] After the fastener driving operation is completed, residual energy may remain in the impact device 20 and spring 11, and the impact device 20 and end cap 13 will collide with the first and second buffer members 93 and 94, respectively, to absorb this residual energy and prevent damage to other components. Note that if the output energy is relatively small, the second base 92 and second buffer member 94 are not necessary, and the guide rail 80 does not need to pass through the end cap 13, and the residual energy can be absorbed by the transmission device 30 and first buffer member 93.

[0040] The operation principle of the fastener driving tool 100 of the present invention will be described with reference to Figure 8. The states a, b, c, and d in Figure 8 correspond to one working cycle.

[0041] When the output shaft 430 rotates counterclockwise and reaches state a, the first cam 431 of the first meshing mechanism 43 of the driving device 40 soon begins to mesh with the first meshing portion 231 of the second meshing mechanism 23 of the impact device 20. As the output shaft 430 continues to rotate counterclockwise, the first cam 431 meshes with the first meshing portion 231, causing the driving device 40 to move the impact device 20 in the second direction. The impact device 20 applies a force in the second direction to the transmission belt 31, and when the transmission belt 31 passes the fixed pulley 32, a force in the first direction is applied to the movable end 112 of the spring 11 of the energy storage device 10, compressing the spring 11 in the first direction (the movable end 112 of the spring 11 moves in the first direction, and the fixed end 111 of the spring 11 is connected to the partition plate 12, which is fixed to the aircraft shell 101). As the output shaft 430 continues to rotate counterclockwise, the second cam 432 of the first meshing mechanism 43 of the drive unit 40 meshes with the second meshing portion 232 of the second meshing mechanism 23 of the impact device 20, and the first cam 431 disengages from the first meshing portion 231. As shown in state b, the drive unit 40 continues to move the impact device 20 in the second direction, and the impact device 20 applies a force in the first direction to the movable end 112 of the spring 11 of the energy storage device 10 via the transmission device 30, further compressing the spring 11 in the first direction. As shown in state c, the second cam 432 meshes with the second meshing portion 232, and the drive unit 40 moves the impact device 20 to the top dead center. As shown in state c, the impact device 20 compresses the spring 11 in the first direction via the transmission device 30, storing energy. As the output shaft 430 continues to rotate counterclockwise, the second cam 432 disengages from the second meshing portion 232, causing the spring 11 to extend in the second direction, exerting a force in the second direction on the transmission belt 31. When the transmission belt 31 passes the fixed pulley 32, a force in the first direction is exerted on the impact device 20, causing the impact device 20 to move in the first direction and complete the fastener driving-in operation. After the fastener driving-in operation is completed, the impact device 20 collides with the first buffer member 93, and the end cap 13 connected to the movable end 112 of the spring 11 collides with the second buffer member 94. The first buffer member 93 absorbs the residual energy of the impact device 20, and the second buffer member 94 absorbs the residual energy of the energy storage device 10.As shown in state d, the output shaft 430 continues to rotate counterclockwise, and after rotating for a certain angle, the first cam 431 of the first meshing mechanism 43 of the drive device 40 again meshes with the first meshing portion 231 of the second meshing mechanism 23 of the impact device 20, returning to state a.

[0042] When the impact device 20 moves in the second direction, the transmission belt 31 receives a force in the second direction, passes through the fixed pulley 32, and exerts a force in the first direction on the movable end 112 of the spring 11, compressing the movable end 112 of the spring 11 in the first direction. Similarly, after the first engagement mechanism 43 of the drive unit 40 and the second engagement mechanism 23 of the impact device 20 disengage, the movable end 112 of the spring 11 is released in the second direction, and the transmission belt 31 receives a force in the second direction, passes through the fixed pulley 32, and exerts a force in the first direction on the impact device 20, causing the impact device 20 to move in the first direction and complete the fastener driving-in operation. That is, when the impact device 20 performs the fastener driving-in operation, the end cap 13 connected to the movable end 112 of the spring 11 moves in the opposite direction. Based on the principle of momentum balance, the recoil momentum acting on the machine body, especially the handle, is greatly reduced, and the recoil force felt by the user is also greatly reduced.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. The present invention has been disclosed based on a preferred embodiment, but this does not limit the present invention. Those skilled in the art can make slight changes and modifications based on the above disclosure without departing from the technical scope of the present invention, and can create equivalent embodiments with equivalent changes. The content based on the technical scope of the present invention is intended to include simple changes, equivalent changes and modifications to the above embodiments based on the technical essence of the present invention. [Explanation of symbols]

[0044] 100 Fastener driving machine 101 Shell 10 Energy storage device 11 Spring 111 Fixed end 112 Movable end 12 Divider 13 End cap 130 Storage Space 131 Cylinder part 20 Impact Device 21 Needle 22 Drive wheels 23 Second meshing mechanism 230 base 231 First engagement part (first card shaft) 232 Second engagement portion (second card shaft) 30 Transmission Equipment 31 Transmission Belt 311 Central part 312 End 313 Main body 314 Connecting part 315 First connection part 316 Second connection part 32 Fixed slide wheel 33 Spacer 40 Drive unit 41 Motor 42 Gear transmission mechanism 43 First engagement mechanism 430 output shaft 431 First Cam 432 Second Cam 433 Nut 434 Snap ring 435 bearing 436 Sleeve 50 Consolidation Guide Board 60 Fastener storage clip 71 First fixing plate 72 Second fixing plate 73 Fixtures (screws) 80 guide rail 91 First Base 92 Second Base 93 First buffer member 94 Second buffer member

Claims

1. A fastener driving machine, the energy storage device has an energy storage state and a release state; The impact device moves along a first direction to drive the fastener into the workpiece; a transmission device connecting the energy storage device and the impact device; a drive device cooperable with said impact device; In the process of switching the energy storage device from the release state to the energy storage state, the driving device moves the impact device in a second direction different from the first direction, and the impact device drives the energy storage device via the transmission device to store energy; When the energy storage device switches from the energy storage state to the release state, the energy storage device releases energy along the second direction to drive the transmission device, and the transmission device moves the impact device in the first direction; the energy storage device includes a spring; the spring includes a fixed end and a movable end; the movable end is movable relative to the fixed end; the movable end moves along the second direction to release energy; The movable end moves along the first direction and stores energy; the energy storage device includes a partition plate and an end cap; The fixed end is fixed to the partition plate, The movable end is accommodated in an accommodation space formed by the end cap, the end cap moves with the movable end; the transmission device includes a transmission belt; The transmission belt is connected between the end cap and the impact device; The fastener driving tool further includes a guide rail; the guide rail passes through the spring and the end cap along the extension / contraction direction of the spring; The fastener driving tool further includes a second base connected to the guide rail and a second buffer member attached to the second base, The fastener driving tool is characterized in that, after the impact device moves along the first direction to drive the fastener into the workpiece, the end cap collides with the second buffer member.

2. 2. The fastener driving tool according to claim 1, wherein the first direction and the second direction are opposite directions.

3. 2. The fastener driving tool according to claim 1, wherein the impact device is at least partially located within the energy storage device when the energy storage device is in the energy storage state.

4. When the energy storage device switches from the release state to the energy storage state, the driving device cooperates with the impact device, and the driving device moves the impact device in the second direction different from the first direction; 2. The fastener driving tool according to claim 1, wherein, during the process of switching the energy storage device from the energy storage state to the release state, the drive device releases cooperation with the impact device, the energy storage device releases energy along the second direction to drive the transmission device, and the transmission device moves the impact device in the first direction.

5. the transmission device includes a transmission belt; the transmission belt is connected between the energy storage device and the impact device; The transmission device includes a fixed pulley; The transmission belt is attached to the fixed pulley, the energy storage device includes a spring; the spring includes a fixed end and a movable end; the movable end is movable relative to the fixed end; the movable end and the impact device are linked via the transmission device; 2. The fastener driving tool according to claim 1, wherein the moving direction of the movable end is different from the moving direction of the impact device.

6. The fastener driving tool further includes a first fastening plate, a second fastening plate, and a fastener; the transmission belt includes a central portion and two end portions located on either side of the central portion; the central portion includes a main body portion and two connecting portions located on both sides of the main body portion; the connecting portion is connected between the main body portion and the end portion, the connecting portion includes a first connecting portion and a second connecting portion arranged adjacent to each other, the first connecting portion is sandwiched between the end cap and the first fixing plate, the second connecting portion is sandwiched between the first fixing plate and the second fixing plate, The end portion is sandwiched between the main body portion and the second fixing plate, The fastener driving tool according to claim 1 , wherein the fastener fastens the end cap, the first fastening plate, and the second fastening plate together.

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