Fastener driving machine

Abstract

To provide a fastener driving machine.SOLUTION: A fastener driving machine includes an energy storage unit, an impact unit, a rotational power unit, and a driving unit. The impact unit drives the energy storage unit to store energy, and uses the stored energy to drive a fastener into a workpiece along a first direction. The impact unit includes a first mating structure and a second mating structure. The driving unit includes a first planetary gear set and a second planetary gear set driven by the rotational power unit. An energy storage process includes a first stage and a second stage. In the first stage, a first planetary gear set is engaged with the first mating structure, and the impact unit drives the energy storage unit to store the energy. In the second stage, the first planetary gear set is disengaged from the first mating structure, and the second planetary gear set is engaged with the second mating structure, and the impact unit drives the energy storage unit to store the energy.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention belongs to the field of power tools, and particularly relates to a fastening member driving machine.

Background Art

[0002] Generally, a fastening member driving machine includes an energy storage part, a driving part, a rotational power part, and an impact part. The driving part includes a plurality of first meshing teeth, and the impact part includes a plurality of second meshing teeth. When the fastening member driving machine operates, the plurality of first meshing teeth of the driving part mesh with the plurality of second meshing teeth of the impact part, and the driving part moves the impact part in a second direction so that the energy storage part accumulates energy. The impact part moves in a first direction under the action of the energy released from the energy storage part, and drives the fastening member into the workpiece. Here, the first direction and the second direction are opposite to each other. Sometimes, the impact part cannot stop at a position where it can correctly mesh with the driving part, and the fastening member driving machine may not operate normally.

[0003] Therefore, it is necessary to provide a new fastening member driving machine.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present invention provides a fastening member driving machine with stable and smooth operation.

Means for Solving the Problems

[0005] On the one hand, the present invention provides a fastening member driving machine including the following.

[0006] An energy storage part for storing impact energy, An impact part, for storing energy in the energy storage part and driving a fastening member into a workpiece in a first direction by receiving the impact energy released from the energy storage part. The impact part includes a first fitting structure and a second fitting structure, and in the extending direction of the impact part, the first fitting structure and the second fitting structure are arranged at different positions. A rotational power part including a driving part, a first planetary gear set and a second planetary gear set, the first planetary gear set and the second planetary gear set being driven by the rotational power part. The energy storage process of the energy storage part includes a first stage and a second stage. In the first stage, the first planetary gear set engages with the first fitting structure, and the impact part stores energy in the energy storage part. In the second stage, the first planetary gear set disengages from the first fitting structure, the second planetary gear set engages with the second fitting structure, and the impact part stores energy in the energy storage part. A fastening member driving machine characterized by the above is provided.

[0007] On the other hand, the present invention provides a fastening member driving machine including the following.

[0008] An energy storage part, for storing impact energy. An impact part, for storing energy in the energy storage part and driving a fastening member into a workpiece in a first direction by receiving the impact energy released from the energy storage part. The impact part includes a second meshing mechanism, the second meshing mechanism includes a first fitting structure and a second fitting structure, and in the extending direction of the impact part, the first fitting structure and the second fitting structure are arranged at different positions. A rotational power part A driving part capable of meshing with the impact part, the driving part includes a first meshing mechanism, the first meshing mechanism is driven by the rotational power part, and the first meshing mechanism includes a first meshing structure and a second meshing structure. The energy storage process of the energy storage part includes a first stage and a second stage. In the first stage, the first meshing structure meshes with the first fitting structure, and the impact part causes the energy storage part to store energy. In the second stage, the first meshing structure separates from the first fitting structure, the second meshing structure meshes with the second fitting structure, and the impact part causes the energy storage part to store energy. A fastening member driving machine characterized by this.

Effect of the Invention

[0009] In the present invention, the driving part includes a first meshing mechanism, the first meshing mechanism includes a first meshing structure and a second meshing structure, the impact part includes a second meshing mechanism, the second meshing mechanism includes a first mating structure and a second mating structure, the first meshing structure only meshes with the first mating structure, and the second meshing structure only meshes with the second mating structure. These are independent of each other, do not interfere with each other, and there will be no misalignment or jamming in the meshing.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Mode for Carrying Out the Invention

[0011] Here, exemplary embodiments will be described in detail. These examples are shown in the accompanying drawings, and in the following description, unless otherwise indicated, the same numerals in different drawings indicate the same or similar elements. The embodiments described in the present invention do not cover all embodiments corresponding to the present invention.

[0012] The terms used in the present invention are only used for the purpose of describing specific embodiments and are not intended to limit the present invention. Unless otherwise defined, technical and scientific terms used in the present invention have the ordinary meanings understood by those of ordinary skill in the technical field of the present invention. Terms such as "first", "second", etc. used in the present invention do not indicate order, quantity or importance, but are used to distinguish different components. Similarly, terms such as "one" or "a" do not indicate a limitation of quantity, but indicate the existence of at least one. "Plurality" or "several" indicate two or more. Unless otherwise specified, terms such as "front", "rear", "lower" and "upper" are used for convenience of explanation and do not limit the position or spatial direction. Terms such as "comprising" and "including" include the elements and articles listed after said "comprising" and "including", and corresponding elements and articles, and do not exclude other elements and articles. Terms such as "connected" and "coupled" are not limited to physical or mechanical connections, and may include direct or indirect electrical connections. The singular forms "a", "said" and "this" used in the specification and appended claims of the present invention are intended to include the plural forms unless the context clearly indicates otherwise. Also, the term "and / or" used in this specification means including any or all possible combinations of the listed related items.

[0013] Referring to FIGS. 1 to 7, in the first embodiment of the present invention, a fastening member driving machine is provided, which includes an energy storage unit 10, an impact unit 20, a driving unit 30, a rotational power unit 40, and a support unit 50. The impact unit 20 is used to drive the energy storage unit 10 to store energy, and can withstand the impact energy released by the energy storage unit for driving a fastening member into a workpiece along the first direction X. The support unit 50 supports the energy storage unit 10, the impact unit 20, the driving unit 30, and the rotational power unit 40. The fastening member driving machine includes a fastening member guide plate 51 and a fastening member storage clip 52. The fastening member storage clip 52 is connected to the fastening member guide plate 51. A fastening member (not shown in the figure) is stored in the fastening member storage clip 52, and the fastening member storage clip 52 can supply the fastening member to the fastening member guide plate 51. The fastening member guide plate 51 serves to guide the fastening member, and the fastening member is driven into the workpiece by the impact unit 20. In this embodiment, the fastening member is a nail, the fastening member guide plate 51 is a nail guide plate, and the fastening member storage clip 52 is a nail clip.

[0014] The energy storage unit 10 is a medium capable of realizing energy storage through a change in position, and includes, for example, an air spring, a mechanical spring, rubber parts, etc. In this embodiment, the energy storage unit 10 is an air spring, and the energy storage unit 10 includes a cylinder 11, a piston 12, and a seal ring 13. The cylinder 11 and the piston 12 form a sealed space containing gas, and the space between the cylinder 11 and the piston 12 is sealed by the seal 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 a fastening member into the workpiece. The impact unit 20 is movable together with the piston 12. The energy storage unit 10 is for accumulating impact energy, and the driving unit 30 engages with the impact unit 20 and moves the impact unit 20 along the second direction Y to put the energy storage unit 10 into an energy storage state. When the energy storage unit 10 releases impact energy, the impact unit 20 receives the impact energy released from the energy storage unit 10 and drives the fastening member into the workpiece along the first direction X. Note that the first direction X and the second direction Y are opposite directions.

[0015] The rotational power unit 40 provides rotational power to the driving unit 30. The rotational power unit 40 includes a motor 41 and a gear transmission mechanism 42, and the rotational speed and torque output by the motor 41 are transmitted to the driving unit 30 through the gear transmission mechanism 42. The gear transmission mechanism 42 is used to reduce the rotational speed and increase the torque. The gear transmission mechanism 42 includes single-stage or multi-stage planetary gear transmission. In this embodiment, the gear transmission mechanism 42 includes three-stage planetary gear transmission. The gear transmission mechanism 42 further includes a one-way clutch to prevent the motor 41 from rotating reversely and separating the driving unit 30 and the impact unit 20 after the power of the motor 41 is cut off when the impact unit 20 is in a preloaded state.

[0016] The impact part 20 includes an impact rod 23 and a first fitting structure 21 and a second fitting structure 22 provided on the same side of the impact rod 23. In the extending direction of the impact rod 23, the first fitting structure 21 and the second fitting structure 22 are arranged at different positions. In this embodiment, the first fitting structure 21 and the second fitting structure 22 are a first tooth and a second tooth provided on the same side of the impact rod 23 respectively. The first fitting structure 21 can be implemented as the first tooth, and the second fitting structure 22 can be implemented as the second tooth. In other embodiments, the first fitting structure 21 and the second fitting structure 22 are a first groove and a second groove provided on the same side of the impact rod 23 respectively. The first fitting structure 21 can be implemented as the first groove, and the second fitting structure 22 can be implemented as the second groove.

[0017] The drive unit 30 includes a rotatable output shaft 43, a first planetary gear unit 31 and a second planetary gear unit 32 arranged along the axial direction of the output shaft 43, and the first planetary gear unit 31 and the second planetary gear unit 32 are arranged opposite to each other in the axial direction of the output shaft 43. In the arrangement direction of the first planetary gear unit 31 and the second planetary gear unit 32, the impact unit 20 is located between the first planetary gear unit 31 and the second planetary gear unit 32. The output shaft 43 is driven by a rotational power unit 40. The output shaft 43 penetrates at least a part of the first planetary gear unit 31 and the second planetary gear unit 32. Specifically, the first planetary gear unit 31 and the second planetary gear unit 32 are attached to the output shaft 43. The energy storage process of the energy storage unit 10 includes a first stage and a second stage. In the first stage, the first planetary gear unit 31 meshes with the first fitting structure 21, and the impact unit 20 causes the energy storage unit 10 to store energy. In the second stage, the first planetary gear unit 31 disengages from the first fitting structure 21, the second planetary gear unit 32 meshes with the second fitting structure 22, and the impact unit 20 causes the energy storage unit 10 to store energy. Specifically, in some embodiments, when the first planetary gear unit 31 disengages from the first fitting structure 21, the second planetary gear unit 32 meshes with the second fitting structure 22, and the impact unit 20 causes the energy storage unit 10 to store energy. In other embodiments, when the second planetary gear unit 32 meshes with the second fitting structure 22, the first planetary gear unit 31 has not yet disengaged from the first fitting structure 21, and after a certain operation, the first planetary gear unit 31 disengages from the first fitting structure 21, and the second planetary gear unit 32 continues to mesh with the second fitting structure 22 and the impact unit 20 causes the energy storage unit 10 to store energy.

[0018] The first planetary gear unit 31 includes a fixed first internal gear ring 311, a first planetary gear 312 that revolves around the first internal gear ring 311, a first propulsion structure 313 connected to the first planetary gear 312, and a first crank 314 connected to the output shaft 43 and rotatable together with the output shaft 43. The second planetary gear unit 32 includes a fixed second internal gear ring 321, a second planetary gear 322 that revolves around the second internal gear ring 321, a second propulsion structure 323 connected to the second planetary gear 322, and a second crank 324 connected to the output shaft 43 and rotatable together with the output shaft 43. The first planetary gear 312 meshes with the first internal gear ring 311, and the second planetary gear 322 meshes with the second internal gear ring 321. The first planetary gear 312 is connected to the first crank 314 in a rotatable manner and can move together with the first crank 314. The second planetary gear 322 is also connected to the second crank 324 in a rotatable manner and can move together with the second crank 324. The first propulsion structure 313 rotates as the first planetary gear 312 rotates, and the second propulsion structure 323 rotates as the second planetary gear 322 rotates. The first propulsion structure 313 meshes with the first fitting structure 21 to move the impact portion 20 along the second direction Y by a first stroke, and the second propulsion structure 323 meshes with the second fitting structure 22 to move the impact portion 20 along the second direction Y by a second stroke. By adding the first stroke and the second stroke, one complete stroke is formed. The ratio of the number of teeth of the first internal gear ring 311 to the number of teeth of the first planetary gear 312 is 3:1, and the ratio of the number of teeth of the second internal gear ring 321 to the number of teeth of the second planetary gear 322 is also 3:1. The first crank 314 includes a first crankshaft 315, and the second crank 324 includes a second crankshaft 325. The first planetary gear 312 is attached to the first crankshaft 315 in a rotatable manner, and the second planetary gear 322 is attached to the second crankshaft 325 in a rotatable manner. A line connecting the center of the first crankshaft 315 and the center of the output shaft 43 is defined as the first line, and a line connecting the center of the second crankshaft 325 and the center of the output shaft 43 is defined as the second line. The angle between the projection of the first line in the extension direction of the output shaft 43 and the projection of the second line in the extension direction of the output shaft 43 is 120°.

[0019] Define the fitting area between the first propulsion structure 313 and the first fitting structure 21 as the first fitting area, and define the fitting area between the second propulsion structure 323 and the second fitting structure 22 as the second fitting area. Define the projection of the first fitting area in the extension direction of the impact rod 23 as the first projection, and define the projection of the second fitting area in the extension direction of the impact rod 23 as the second projection. The first projection and the second projection do not overlap. The first fitting structure 21 can be implemented as the first tooth, and the second fitting structure 22 can be implemented as the second tooth. The projection of the first tooth in the extension direction of the impact rod 23 and the projection of the second tooth in the extension direction of the impact rod 23 do not overlap or partially overlap. By designing in this way, the first propulsion structure 313 of the first planetary gear part 31 can only be fitted with the first fitting structure 21 of the impact part 20, and the second propulsion structure 323 of the second planetary gear part 32 can only be fitted with the second fitting structure 22 of the impact part 20, so they are independent of each other and do not interfere. The first fitting structure 21 can be implemented as the first tooth, and the second fitting structure 22 can be implemented as the second tooth. In this embodiment, the first tooth is attached to the impact rod 23 by a method of positioning with a cylindrical pin and fixing with a screw, and the second tooth is integrally formed with the impact rod 23. In other embodiments, the first tooth and the second tooth may be integrally formed with the impact rod 23.

[0020] The support part 50 further includes an upper cover 53 and a base 54, and the output shaft 43 is located between the upper cover 53 and the base 54. Both ends of the output shaft 43 are supported by a first bearing 61 and a second bearing 62 respectively. Specifically, the first end of the output shaft 43 is supported by the first bearing 61, and the first bearing 61 is supported between the upper cover 53 and the first end of the output shaft 43. The second end of the output shaft 43 is supported by the second bearing 62, and the second bearing 62 is supported between the base 54 and the second end of the output shaft 43. Note that the gear transmission mechanism 42 is not essential. When the torque of the motor 41 is large enough, the motor shaft can be directly used as the output shaft 43.

[0021] The first internal gear ring 311 and the second internal gear ring 321 are both fixedly arranged within the accommodation space surrounded by the base 54 and the upper cover 53. The first internal gear ring 311 and the second internal gear ring 321 are arranged relatively along the axial direction of the output shaft 43. The first propulsion structure 313 is eccentrically connected to the first planetary gear 312 and protrudes toward the side close to the second internal gear ring 321 of the first planetary gear 312. The second propulsion structure 323 is eccentrically connected to the second planetary gear 322 and protrudes toward the side close to the first internal gear ring 311 of the second planetary gear 322.

[0022] The first propulsion structure 313 includes a first pin shaft 316 and a first bearing 317 mounted on the first pin shaft 316. The second propulsion structure 323 includes a second pin shaft 326 and a second bearing 327 mounted on the second pin shaft 326. The first pin shaft 316 is eccentrically connected to the first planetary gear 312, and the second pin shaft 326 is eccentrically connected to the second planetary gear 322. When the first fitting structure 21 and the second fitting structure 22 are the first teeth and the second teeth respectively, the first propulsion structure 313 meshes with the first teeth, and the second propulsion structure 323 meshes with the second teeth. When the first fitting structure 21 and the second fitting structure 22 are the first groove and the second groove respectively, the first propulsion structure 313 fits with the first groove, and the second propulsion structure 323 fits with the second groove. By installing bearings, the frictional force when the propulsion structure and the fitting structure fit together can be reduced, but it is not essential for realizing the function.

[0023] The fastener driving machine further includes a support mechanism 70 installed between the first planetary gear unit 31 and the second planetary gear unit 32. The support mechanism 70 is attached to the output shaft 43 and is in contact with the first planetary gear 312 and the second planetary gear 322. Specifically, the support mechanism 70 includes a spring 75, a first pressing ring 71, a second pressing ring 72, a first support ring 73, and a second support ring 74. The spring 75, the first pressing ring 71, the second pressing ring 72, the first support ring 73, and the second support ring 74 are all mounted on the output shaft 43. The spring 75 is disposed between the first pressing ring 71 and the second pressing ring 72. The side of the first pressing ring 71 away from the spring 75 is in contact with the first planetary gear 312. The side of the second pressing ring 72 away from the spring 75 is in contact with the second planetary gear 322. The first pressing ring 71 is supported between the spring 75 and the first support ring 73, and the second pressing ring 72 is supported between the spring 75 and the second support ring 74. By installing the first pressing ring 71, the second pressing ring 72, and the spring 75, it is possible to prevent the planetary gear from axially falling off from the crankshaft. The first support ring 73 supports the first pressing ring 71, and the second support ring 74 supports the second pressing ring 72.

[0024] The fastener driving machine further includes a buffer member 80, and the buffer member 80 is installed between the piston 12 and the base 54. When the piston 12 is not driven by the impact portion 20, the piston 12 is in close contact with the buffer member 80. At this time, the position where the impact portion 20 is located is called the bottom dead center. When the piston 12 is driven to the limit position by the impact portion 20, the position where the impact portion 20 is located is called the top dead center.

[0025] Referring to the states a, b, c, d, e, and f shown in FIG. 8, these states a to f correspond to one working cycle.

[0026] State a is the initial state of the entire working cycle, and the impact part 20 is in the preload position. The impact part 20 drives the piston 12 to compress the energy storage part 10. The second propulsion structure 323 of the second planetary gear part 32 meshes with the second fitting structure 22 of the impact part 20, and the first propulsion structure 313 of the first planetary gear part 31 does not mesh with the first fitting structure 21 of the impact part 20. When the output shaft 43 further rotates counterclockwise, the first crank 314 and the second crank 324 rotate, and the second propulsion structure 323 of the second planetary gear part 32 continues to push the impact part 20, and the impact part 20 drives the piston 12 to reach state b. At this time, the impact part 20 is located at the top dead center.

[0027] When the output shaft 43 further rotates counterclockwise, the second propulsion structure 323 of the second planetary gear part 32 disengages from the second fitting structure 22 of the impact part 20, and the impact part 20 drives the fastening member to drive the workpiece along the first direction X under the action of the impact energy released by the energy storage part 10. At this time, the piston 12 reaches the bottom dead center and is in close contact with the buffer member 80 (state c).

[0028] When the output shaft 43 further rotates counterclockwise, the first propulsion structure 313 of the first planetary gear part 31 does not mesh with the first fitting structure 21 of the impact part 20, and the second propulsion structure 323 of the second planetary gear part 32 also does not mesh with the second fitting structure 22 of the impact part 20. After a certain angle of free rotation, the first propulsion structure 313 of the first planetary gear part 31 begins to mesh with the first fitting structure 21 of the impact part 20 (state d).

[0029] When the output shaft 43 further rotates counterclockwise, the first propulsion structure 313 of the first planetary gear part 31 pushes the impact part 20, and the impact part 20 drives the piston 12. In state e, the first propulsion structure 313 of the first planetary gear part 31 disengages from the first fitting structure 21 of the impact part 20, and the second propulsion structure 323 of the second planetary gear part 32 begins to mesh with the second fitting structure 22 of the impact part 20.

[0030] When the output shaft 43 further rotates counterclockwise, the first propulsion structure 313 of the first planetary gear unit 31 disengages from the first fitting structure 21 of the impact part 20, and the second propulsion structure 323 of the second planetary gear unit 32 engages with the second fitting structure 22 of the impact part 20 to alternately push the impact part 20, and the impact part 20 drives the piston 12 (state f).

[0031] When the output shaft 43 further rotates counterclockwise, the second propulsion structure 323 of the second planetary gear unit 32 engages with the second fitting structure 22 of the impact part 20, returns the impact part 20 to the preloading position, and completes one working cycle.

[0032] Referring to FIG. 9, when the output shaft 43 rotates counterclockwise and the first crank 314 and the second crank 324 rotate, the second propulsion structure 323 of the second planetary gear unit 32 continuously pushes the impact part 20, and the impact part 20 drives the piston 12 to reach state b. At this time, the impact part 20 is located at the top dead center.

[0033] When the output shaft 43 further rotates counterclockwise, the second propulsion structure 323 of the second planetary gear unit 32 disengages from the second fitting structure 22 of the impact part 20, and the impact part 20 drives the fastening member into the workpiece along the first direction X under the action of the impact energy released by the energy storage part 10. However, if the nail gets stuck for some reason, the fastening member may get stuck inside the fastening member guide plate 51, and the impact part 20 may stop at an arbitrary position along the first direction X (state g).

[0034] After the jamming occurs, when the output shaft 43 further rotates counterclockwise, the first propulsion structure 313 of the first planetary gear unit 31 reaches the position of the second fitting structure 22 of the impact part 20 (state h). Since the first propulsion structure 313 and the second fitting structure 22 are arranged at different positions in the axial direction of the output shaft 43, the first propulsion structure 313 and the second fitting structure 22 cannot engage. At this time, the first planetary gear unit 31 and the second planetary gear unit 32 are still in the free rotation state.

[0035] When the output shaft 43 further rotates counterclockwise, the second propulsion structure 323 of the second planetary gear unit 32 reaches the position of the second fitting structure 22 of the impact part 20, and the second propulsion structure 323 starts to mesh with the second fitting structure 22 (state i).

[0036] When the output shaft 43 further rotates counterclockwise, the second propulsion structure 323 of the second planetary gear unit 32 meshes with the second fitting structure 22 of the impact part 20, pushing the impact part 20 to drive the piston 12 (state j).

[0037] When the output shaft 43 further rotates counterclockwise, the second propulsion structure 323 of the second planetary gear unit 32 meshes with the second fitting structure 22 of the impact part 20, returning the impact part 20 to the preloading position and returning to the initial state a.

[0038] In this embodiment, the drive unit 30 includes a first planetary gear unit 31 and a second planetary gear unit 32 distributed along the axial direction of the output shaft 43. The first propulsion structure 313 of the first planetary gear unit 31 can only mesh with the first fitting structure 21 of the impact part 20, and the second propulsion structure 323 of the second planetary gear unit 32 can only mesh with the second fitting structure 22 of the impact part 20. These are independent of each other, do not interfere with each other, and no meshing errors or jams will occur.

[0039] Please refer to FIGS. 10 to 17. In the second embodiment of the present invention, a fastener driving machine is provided, which includes a machine housing 101, an energy storage unit 10, an impact part 20, a drive unit 30, a rotational power unit 40, and a transmission unit 50 mounted in the machine housing 101. The rotational power unit 40 provides rotational power to the drive unit 30. The transmission unit 50 connects the energy storage unit 10 and the impact part 20. The energy storage unit 10 has an energy storage state and a release state. The impact part 20 is used to store energy in the energy storage unit 10, receive the impact energy released by the energy storage unit 10, and drive a fastener into a workpiece along the first direction X.

[0040] The driving part 30 can mesh with the impact part 20. The driving part 30 includes a first meshing mechanism 33. The first meshing mechanism 33 includes a first meshing structure 31 and a second meshing structure 32. The impact part 20 includes a second meshing mechanism 23, a striking pin 24 and a driving wheel 25 connected to the second meshing mechanism 23. The second meshing mechanism 23 further includes a base 230. The base 230 and the striking pin 24 are connected by a pin, and both can move integrally. The striking pin 24 is used to drive a fastening member into a workpiece along the first direction X. The driving wheel 25 is attached to the base 230 via a pin and can rotate around the pin. The driving wheel 25 is connected to the transmission part 50 and drives the energy storage part 10 to store energy.

[0041] The second meshing mechanism 23 includes a first fitting structure 21 and a second fitting structure 22. The first fitting structure 21 and the second fitting structure 22 are arranged on the base 230. In the extension direction of the impact part 20, the first fitting structure 21 and the second fitting structure 22 are arranged at different positions. The energy storage process of the energy storage part 10 includes a first stage and a second stage. In the first stage, the first meshing structure 31 meshes with the first fitting structure 21, and the impact part 20 causes the energy storage part 10 to store energy. In the second stage, the first meshing structure 31 separates from the first fitting structure 21, the second meshing structure 32 meshes with the second fitting structure 22, and the impact part 20 causes the energy storage part 10 to store energy.

[0042] Specifically, in the first stage, the first meshing structure 31 meshes with the first fitting structure 21, and the driving part 30 drives the impact part 20 along the second direction Y. In the second stage, the first meshing structure 31 separates from the first fitting structure 21, the second meshing structure 32 meshes with the second fitting structure 22, and the driving part 30 drives the impact part 20 along the second direction Y. The first meshing structure 31 can be implemented as a first cam, and the second meshing structure 32 can be implemented as a second cam. The first fitting structure 21 can be implemented as a first pin shaft, and the second fitting structure 22 can be implemented as a second pin shaft. The first fitting structure 21 and the second fitting structure 22 are attached to the base 230. The first meshing structure 31 meshes with the first fitting structure 21, and the second meshing structure 32 meshes with the second fitting structure 22.

[0043] The first meshing mechanism 33 further includes an output shaft 43. Both the first meshing structure 31 and the second meshing structure 32 are attached to the output shaft 43 and rotate together with the output shaft 43. The output shaft 43 penetrates at least a part of the first meshing structure 31 and the second meshing structure 32. The first meshing structure 31 and the second meshing structure 32 are arranged offset along the axial direction of the output shaft 43.

[0044] The first meshing structure 31 periodically meshes with or separates from the first fitting structure 21 as the output shaft 43 rotates. Similarly, the second meshing structure 32 periodically meshes with or separates from the second fitting structure 22 as the output shaft 43 rotates. In one rotation cycle of the output shaft 43, the rotation angle during the process in which the first meshing structure 31 maintains meshing with the first fitting structure 21 is less than 180°, and the rotation angle during the process in which the second meshing structure 32 maintains meshing with the second fitting structure 22 is also less than 180°.

[0045] The energy storage unit 10 includes a spring 11, a partition plate 12, and a tail cover 13. The spring 11 is disposed between the tail cover 13 and the partition plate 12. The partition plate 12 is fixed within the machine housing 101. The spring 11 has a fixed end 111 and a movable end 112. 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 is accommodated in the accommodation space 130 formed by the tail cover 13.

[0046] The transmission unit 50 includes a conveyor belt 51 and two fixed pulleys 52. The two fixed pulleys 52 are attached to the machine housing 101, and the conveyor belt 51 is attached to the two fixed pulleys 52. The conveyor belt 51 is connected between the drive wheel 25 of the impact unit 20 and the tail cover 13 of the energy storage unit 10.

[0047] The fastening member driving machine 100 includes a first base 91 and a second base 92 attached within the machine housing 101. Further, the fastening member driving machine 100 includes a first buffer member 93 installed in the first base 91 and a second buffer member 94 installed in the second base 92. After the impact unit 20 moves along the first direction X and drives the fastening member into the workpiece, the impact unit 20 collides with the first buffer member 93, and the tail cover 13 collides with the second buffer member 94.

[0048] Hereinafter, with reference to FIG. 17, the operating principle of the fastening member driving machine 100 in this embodiment will be described. The states a, b, c, and d shown in FIG. 17 correspond to one working cycle.

[0049] When the output shaft 43 rotates counterclockwise and reaches the position shown in state a, at this time, the first meshing structure 31 of the first meshing mechanism 33 of the driving part 30 is in a state just before meshing with the first fitting structure 21 of the second meshing mechanism 23 of the impact part 20. When the output shaft 43 rotates further counterclockwise, the first meshing structure 31 meshes with the first fitting structure 21, and the driving part 30 drives the impact part 20 along the second direction Y. The impact part 20 applies a force to the transmission belt 51 in the second direction Y. The transmission belt 51 applies a force along the first direction X to the movable end 112 of the spring 11 of the energy storage part 10 via the fixed pulley 52, compressing the spring 11 in the first direction X (the movable end 112 of the spring 11 moves in the first direction X, the fixed end 111 of the spring 11 is connected to the partition plate 12, and the partition plate 12 is fixed to the machine housing 101). When the output shaft 43 rotates further counterclockwise, the second meshing structure 32 of the first meshing mechanism 33 of the driving part 30 meshes with the second fitting structure 22 of the second meshing mechanism 23 of the impact part 20, and the first meshing structure 31 releases the meshing with the first fitting structure 21 (state b). The driving part 30 continues to drive the impact part 20 along the second direction Y, and the impact part 20 continues to apply a force along the first direction X to the movable end 112 of the spring 11 of the energy storage part 10 via the transmission part 50, further compressing the spring 11 in the first direction X.

[0050] When the output shaft 43 rotates further counterclockwise, the second meshing structure 32 meshes with the second fitting structure 22, and the driving part 30 drives the impact part 20 to the top dead center (state c). At the same time, the impact part 20 compresses the spring 11 in the first direction X via the transmission part 50 to complete the energy storage. When the output shaft 43 rotates further counterclockwise, the second meshing structure 32 releases the meshing with the second fitting structure 22, and the spring 11 extends in the second direction Y. Due to this extension, a force along the second direction Y is applied to the transmission belt 51, and the transmission belt 51 applies a force along the first direction X to the impact part 20 via the fixed pulley 52, causing the impact part 20 to move along the first direction X to complete the operation of driving the fastening member.

[0051] After the driving operation of the fastening member is completed, the impact portion 20 collides with the first buffer member 93, and the tail cover 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 portion 20, and the second buffer member 94 absorbs the residual energy of the energy storage portion 10 (state d). The output shaft 43 further rotates counterclockwise, and after rotating a certain angle, the first meshing structure 31 of the first meshing mechanism 33 of the driving portion 30 meshes with the first fitting structure 21 of the second meshing mechanism 23 of the impact portion 20 again, and returns to state a.

[0052] In this embodiment, the driving portion 30 includes a first meshing mechanism 33. The first meshing mechanism 33 includes a first meshing structure 31 and a second meshing structure 32. The impact portion 20 includes a second meshing mechanism 23. The second meshing mechanism 23 includes a first fitting structure 21 and a second fitting structure 22. The first meshing structure 31 meshes only with the first fitting structure 21, and the second meshing structure 32 meshes only with the second fitting structure 22. These are independent of each other, do not interfere with each other, and no meshing errors or jams occur.

[0053] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. The present invention has been disclosed with a preferred embodiment, but this does not limit the present invention. A person skilled in the art can make some changes or modifications using the above disclosure content within the scope not departing from the technical scope of the present invention, and create an equivalent modified embodiment. The content not departing from the technical scope of the present invention shall include simple changes, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention.

Explanation of Reference Numerals

[0054] (First Embodiment) 10 Energy storage portion 20 Impact portion 30 Driving portion 40 Rotational power portion 50 Support portion 70 Support mechanism 80 Buffer member 11 Cylinder 12 Piston 13 Seal ring 21 First fitting structure 22 Second fitting structure 23 Impact rod 31 First planetary gear unit 32 Second planetary gear unit 311 First internal gear ring 312 First planetary gear 313 First propulsion structure 314 First crank 315 First crankshaft 316 First pin shaft 317 First bearing 321 Second internal gear ring 322 Second planetary gear 323 Second propulsion structure 324 Second crank 325 Second crankshaft 326 Second pin shaft 327 Second bearing 41 Motor 42 Gear transmission mechanism 43 Output shaft 51 Fastening member guide plate 52 Fastening member storage clip 53 Upper cover 54 Base 61 First bearing 62 Second bearing 71 First pressing ring 72 Second pressing ring 73 First support ring 74 Second support ring 75 Spring X First direction Y Second direction (Second Embodiment) 100 Fastening member driving machine 101 Machine housing 10 Energy storage part 20 Impact part 30 Driving part 40 Rotating power unit 50 Transmission unit 11 Spring 12 Partition board 13 Tail cover 111 Fixed end 112 Movable end 21 First fitting structure 22 Second fitting structure 23 Second meshing mechanism 24 Firing pin 25 Driving wheel 230 Base 31 First meshing structure 32 Second meshing structure 33 First meshing mechanism 43 Output shaft 51 Conveyor belt 52 Fixed pulley 91 First base 92 Second base 93 First buffer member 94 Second buffer member X First direction Y Second direction

Claims

1. an energy storage unit for storing impact energy; an impact unit for storing energy in the energy storage unit and receiving the impact energy released from the energy storage unit to drive a fastening member into a workpiece in a first direction; A rotational power unit; a drive section including a first planetary gear set and a second planetary gear set; The impact portion includes a first fitting structure and a second fitting structure, The first fitting structure and the second fitting structure are disposed at different positions in an extension direction of the impact portion, the first planetary gear set and the second planetary gear set are driven by the rotational power unit, The energy storage process of the energy storage unit includes a first stage and a second stage, In the first stage, the first planetary gear set is engaged with the first engaging structure, and the impact part causes the energy storage part to store energy; and in the second stage, the first planetary gear set is separated from the first fitting structure, the second planetary gear set is fitted to the second fitting structure, and the impact portion causes the energy storage portion to store energy.

2. The fastener driving tool of claim 1 , wherein the first planetary gear set disengages from the first mating structure while the second planetary gear set engages with the second mating structure.

3. The drive unit includes a rotatable output shaft; the first planetary gear set and the second planetary gear set are distributed along an axial direction of the output shaft, the first planetary gear set includes a fixed first ring, a first planetary gear that revolves relative to the first ring, and a first propulsion structure connected to the first planetary gear; the second planetary gear set includes a fixed second internal gear, a second planetary gear that revolves relative to the second internal gear, and a second propulsion structure connected to the second planetary gear; the first planetary gear meshes with the first internal gear, The second planetary gear meshes with the second internal gear, the first propulsion structure is engaged with the first fitting structure to propel the impact portion; The fastener driving tool according to claim 1 , wherein the second propulsion structure is engaged with the second engagement structure to propel the impact portion.

4. an engagement area between the first propulsion structure and the first engagement structure is defined as a first engagement area; an interlocking area between the second propulsion structure and the second interlocking structure is defined as a second interlocking area; The first fitting area is defined as a first projection projected in the extension direction of the impact portion, The second fitting area is defined as a second projection projected in the extension direction of the impact portion, The fastener driving tool of claim 3 , wherein the first projection and the second projection do not overlap.

5. the first internal gear wheel and the second internal gear wheel are disposed relative to each other along the axial direction of the output shaft, the first propulsion structure is eccentrically connected to the first planetary gear; The fastener driving tool of claim 3 , wherein the second propulsion structure is eccentrically connected to the second planetary gear.

6. The impact part further includes an impact bar, The first and second fitting structures are first and second teeth, respectively, provided on the same side of the impact bar; 2. The fastener driving tool of claim 1, wherein a projection of the first tooth in the extension direction of the impact bar and a projection of the second tooth in the extension direction of the impact bar do not overlap or partially overlap.

7. the first planetary gear set further includes a first crank connected to the output shaft and rotatable with the output shaft; the first planetary gear is connected to the first crank in a rotatable manner and is movable together with the first crank; the second planetary gear set further includes a second crank connected to the output shaft and rotatable with the output shaft; 4. The fastener driving tool of claim 3, wherein the second planetary gear is rotatably connected to the second crank and movable therewith.

8. The first crank includes a first crankshaft, the second crank includes a second crankshaft, the first planetary gear is rotatably mounted on the first crankshaft; the second planetary gear is rotatably attached to the second crankshaft, A line connecting a center of the first crankshaft and a center of the output shaft is defined as a first line, A line connecting a center of the second crankshaft and a center of the output shaft is defined as a second line, 8. The fastener driving tool according to claim 7, wherein an angle between the first line projected in the extension direction of the output shaft and the second line projected in the extension direction of the output shaft is 120°.

9. 2. The fastener driving tool according to claim 1, wherein the impact portion is disposed between the first planetary gear set and the second planetary gear set in an arrangement direction of the first planetary gear set and the second planetary gear set.

10. The impact part further includes an impact bar, The first fitting structure and the second fitting structure are disposed on the same side of the impact bar; In the extending direction of the impact bar, the first fitting structure and the second fitting structure are disposed at different positions; The fastener driving tool according to claim 1 , wherein the first fitting structure is attached to the impact bar by a cylindrical pin positioning and a screw fixing method.

11. an energy storage unit used to store impact energy; an impact unit for storing energy in the energy storage unit and receiving the impact energy released from the energy storage unit to drive a fastening member into a workpiece in a first direction; A rotational power unit; a drive portion capable of engaging with the impact portion, the drive portion including a first engagement mechanism; The impact portion includes a second engagement mechanism; the second interlocking mechanism includes a first interlocking structure and a second interlocking structure; The first fitting structure and the second fitting structure are disposed at different positions in an extension direction of the impact portion, The first meshing mechanism is driven by the rotation power unit, the first interlocking mechanism includes a first interlocking structure and a second interlocking structure; The energy storage process of the energy storage unit includes a first stage and a second stage, In the first stage, the first meshing structure meshes with the first fitting structure, and the impact portion causes the energy storage portion to store energy; In the second stage, the first interlocking structure separates from the first fitting structure, the second interlocking structure interlocks with the second fitting structure, and the impact portion stores energy in the energy storage portion.

12. the first meshing structure is a first planetary gear set or a first cam; The fastener driving tool of claim 11 , wherein the second meshing formation is a second planetary gear set or a second cam.

13. The first engagement mechanism further includes an output shaft. the first meshing structure and the second meshing structure are attached to the output shaft and rotatable with the output shaft; The fastener driving tool of claim 11 , wherein the first and second interlocking structures are offset from one another along the axial direction of the output shaft.

14. the first meshing structure periodically meshes with or disengages from the first fitting structure as the output shaft rotates; the second meshing structure periodically meshes with or disengages from the second fitting structure as the output shaft rotates; When the first meshing structure and the first fitting structure mesh with each other, the driving portion drives and moves the impact portion, When the second meshing structure and the second fitting structure mesh with each other, the driving portion drives and moves the impact portion, In one rotation cycle of the output shaft, a rotation angle during which the first meshing structure maintains meshing with the first fitting structure is less than 180°; The fastener driving tool of claim 13, wherein the second engagement structure rotates through an angle of less than 180° while maintaining engagement with the second fitting structure.

15. The second engagement mechanism further includes a base. The impact unit further includes a striking needle connected to the base, The striking needle is for driving the fastening member into the workpiece in the first direction, The fastener driving tool of claim 11 , wherein the first mating structure and the second mating structure are disposed on the base.

Images