Energy storage firing device for a power nailer

Abstract

The application discloses an energy storage firing device of an electric nail gun and belongs to the technical field of electric nail guns, which comprises a firing unit and an energy storage unit. The firing unit comprises a muzzle seat, a muzzle clamp assembly, a firing piece and a transmission piece. The energy storage unit comprises a fixed seat, a movable seat, a first pulley set, a second pulley set, a pulley belt and an elastic energy storage body. The movable seat can move back and forth along the firing direction. The first pulley set is arranged on the fixed seat, and the second pulley set is arranged on the movable seat. The pulley belt is wound on the first pulley set and the second pulley set. The elastic energy storage body is used for maintaining the movable seat at the maximum retracted position and tensioning the pulley belt. The stroke of the pulley set is amplified, so that a larger firing stroke is realized with a smaller compression stroke, the firing speed is improved, and the nail penetration is increased. Meanwhile, the kinetic energy release direction of the elastic energy storage body is opposite to the firing direction, the nail driving force is effectively balanced, the rebound force is small, the operation comfort is greatly improved, and the energy consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of electric nail gun technology, and in particular to an energy storage firing device for an electric nail gun. Background Technology

[0002] Electric nail guns, as an important tool in the fastener industry, have seen their market share increase in recent years due to the growing trend towards cordless operation. Currently, gas spring technology and pure spring technology are the most popular in the industry. However, both technologies have some significant drawbacks: First, gas spring technology requires pre-filling with high-pressure gas, and leaks may occur after a period of storage, making nail driving weak or even impossible; at the same time, it cannot completely prevent dust, and once dust enters the cylinder, it will scrape the cylinder and leak air, which is irreparable. The operating cost is relatively high and the energy consumption is relatively high.

[0003] Second, pure spring technology has problems such as low firing speed, weak penetration, large rebound force, and easy operator fatigue. In addition, in order to ensure the large axial dimension of the compression stroke, the overall structure of the machine is not compact.

[0004] To address the aforementioned issues, we have invented an electric nail gun that is airless, highly penetrating, has low rebound force, and low energy consumption, effectively solving the current industry pain points. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned technical problems and provide an energy storage firing device for an electric nail gun. By increasing the firing stroke and reducing the energy storage stroke, the nailing speed and penetration are improved, the rebound force is significantly reduced, sufficient firing energy is ensured, and energy saving is achieved.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention discloses an energy storage firing device for an electric nail gun, comprising: The firing unit includes a muzzle mount, a muzzle clip assembly, a firing element, and a transmission component. The firing element is mounted on the muzzle mount and can move back and forth within the muzzle groove of the muzzle clip assembly along the firing direction. The firing element has meshing teeth. The transmission component includes a drive mechanism and an incomplete gear. The incomplete gear engages and disengages with the meshing teeth of the firing element under the drive mechanism, thereby driving the firing element to move backward to a set position to complete energy storage. After reaching the set position, it disengages to enter a new firing state and completes a nail-driving process. The device includes an energy storage unit comprising a fixed base, a movable base, a first pulley group, a second pulley group, a pulley belt, and an elastic energy storage body. The movable base is capable of moving back and forth along the firing direction, and has a maximum forward position and a maximum backward position in its travel. The first pulley group is disposed on the fixed base, and the second pulley group is disposed on the movable base. The pulley belt is wound around the first pulley group and the second pulley group. The elastic energy storage body is used to maintain the movable base in the maximum backward position and to tension the pulley belt so that the pulley belt is in contact with the firing element. The pulley belt moves backward under the push of the firing element, and in conjunction with the transmission of the first pulley group and the second pulley group, drives the movable base to move forward to compress the elastic energy storage body to begin storing energy. The compression direction of the elastic energy storage body is opposite to the movement direction of the firing element.

[0007] In one embodiment, the drive mechanism includes a motor, a gearbox, and a transmission shaft. The motor is mounted on the nozzle holder and drives the transmission shaft through the gearbox. The incomplete gear is mounted on the transmission shaft and is driven to rotate by the transmission shaft.

[0008] In one embodiment, the number and arrangement of pulleys in the first pulley group and the second pulley group can be arbitrarily combined as needed; including but not limited to one or more pulley groups, and their arrangement includes but is not limited to one layer and multiple layers; the arrangement and number of movable pulleys and fixed pulleys in the pulley group can be arbitrarily adjusted according to actual needs; under the action of the pulley group, the movement stroke of the firing element and the compression and release stroke of the elastic energy storage body are multiples of each other.

[0009] In one embodiment, the elastic energy storage body includes, but is not limited to, steel springs, gas springs, and liquid springs.

[0010] In one embodiment, the elastic energy storage body includes, but is not limited to, a combination of one or more of the elastic energy storage bodies.

[0011] In one embodiment, the resultant force center axis of the elastic energy storage body is parallel to the center line of the firing element.

[0012] In one embodiment, both the first pulley group and the second pulley group include one or more pulleys arranged symmetrically about the resultant force center axis of the elastic energy storage body.

[0013] In one embodiment, the tail of the firing element is in contact with the pulley belt.

[0014] In one embodiment, the pulley belt is a flexible belt.

[0015] In one embodiment, one end of the elastic energy storage body is mounted on the fixed base, and the other end is mounted on the movable base.

[0016] The present invention achieves the following technical effects compared to the prior art: In this invention, during the firing phase, under the action of the first and second pulley systems, the firing speed of the firing element is several times that of the release speed of the elastic energy storage body (different multiples can be obtained depending on the different numbers of moving and fixed pulleys in the pulley system). Under this principle, the firing element's speed is multiplied by the pulley system, and the high-speed movement impacts the nail output from the magazine, thus greatly improving the nailing speed and penetration. During the energy storage phase, the stroke of the firing element and the compression stroke of the elastic energy storage body are multiples of each other (based on the multiples of the pulley system). A smaller compression stroke of the elastic energy storage body can achieve a larger firing stroke of the firing element, enabling the nailing of nails of different lengths. The release direction of the elastic energy storage body is opposite to the nailing direction, achieving a balance between nailing force and rebound force, resulting in very small rebound force. This reduces fatigue and improves the user experience when used as a handheld tool. Simultaneously, the structure is more compact, and the overall weight is reduced by nearly 20% compared to traditional electric nail guns. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained by analyzing these drawings without creative effort, and all of them fall within the protection scope of the present invention.

[0018] Figure 1 This is a three-dimensional structural diagram of an electric nail gun (including an energy storage firing device) in an embodiment of the present invention; Figure 2 for Figure 1 A magnified schematic diagram of a portion of the firing unit of an electric nail gun; Figure 3 This is a longitudinal sectional view of the electric nail gun (including the energy storage firing device) along its central axis in an embodiment of the present invention. Figure 4 This is a schematic cross-sectional view of the electric nail gun (initial state) along the central axis in an embodiment of the present invention; Figure 5 This is a schematic cross-sectional view of the electric nail gun (energy storage completion stage) along the central axis in an embodiment of the present invention. Figure 6 This is a schematic cross-sectional view of the electric nail gun (at the moment of release) along the central axis in an embodiment of the present invention. Figure 7This is a schematic diagram of the electric nail gun nozzle passing through the nail groove in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Firing unit; 2. Energy storage unit; 11. Mouthpiece holder; 12. Mouthpiece and clip assembly; 13. Firing element; 14. Incomplete gear; 15. Motor; 16. Gearbox; 17. Drive shaft; 21. Fixed seat; 22. Movable seat; 23. First pulley block; 24. Second pulley block; 25. Pulley belt; 26. Elastic energy storage body. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments analyzed and obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The purpose of this invention is to provide an energy storage firing device for an electric nail gun to solve the problems existing in the prior art. By increasing the firing stroke and reducing the energy storage stroke, the nailing speed and penetration are improved, the rebound force is significantly reduced, sufficient firing energy is guaranteed, and energy saving is achieved.

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1 to 7 As shown, this embodiment provides an energy storage firing device for an electric nail gun, including a firing unit 1 and an energy storage unit 2; wherein: The firing unit 1 includes a muzzle holder 11, a muzzle clip assembly 12, a firing element 13, and a transmission component. The firing element 13 is disposed on the muzzle holder 11 and can move back and forth in the muzzle groove of the muzzle clip assembly 12 along the firing direction. The firing element 13 has meshing teeth. The transmission component includes a drive mechanism and an incomplete gear 14. The incomplete gear 14 engages and disengages with the meshing teeth of the firing element 13 under the drive of the drive mechanism, thereby driving the firing element 13 to move backward to a set position to complete energy storage. After reaching the set position, it disengages to enter a new firing state and completes a nail-driving process. The energy storage unit 2 includes a fixed base 21, a movable base 22, a first pulley group 23, a second pulley group 24, a pulley belt 25, and an elastic energy storage body 26. The movable base 22 can move back and forth along the firing direction, and has a maximum forward position and a maximum backward position in its movement stroke. The first pulley group 23 is disposed on the fixed base 21, and the second pulley group 24 is disposed on the movable base 22. The pulley belt 25 is wound around the first pulley group 23 and the second pulley group 24. The elastic energy storage body 26 is used to maintain the movable base 22 in the maximum backward position and to tension the pulley belt 25 so that the pulley belt 25 is in contact with the firing element 13. The pulley belt 25 moves backward under the push of the firing element 13, and in conjunction with the transmission of the first pulley group 23 and the second pulley group 24, drives the movable base 22 to move forward to compress the elastic energy storage body 26 to start storing energy. The compression direction of the elastic energy storage body 26 is opposite to the movement direction of the firing element 13.

[0024] Firing Phase: When the incomplete gear 14 moves the firing element 13 to the preset rearward position (also known as the preset release position), the meshing teeth of the incomplete gear 14 and the firing element 13 disengage. The firing element 13 no longer pushes the pulley belt 25 to compress the elastic energy storage body 26. The elastic energy storage body 26 begins to reset and release kinetic energy, pushing the movable seat 22 backward. Under the action of the pulley group (first pulley group 23, second pulley group 24), the pulley belt 25 pushes the firing element 13 forward at high speed, entering the nozzle and passing through the nail groove to fire the nail at high speed. (Reference) Figure 6 As shown, in this stage, the moving direction of the firing element 13 is opposite to the moving direction of the movable seat 22, and the releasing direction of the elastic energy storage body 26 is opposite to the firing direction of the firing element 13.

[0025] in: During the firing (launching) phase, under the action of the first pulley group 23 and the second pulley group 24, the speed of the firing element 13 is several times that of the release speed of the elastic energy storage body 26. By initially setting the pulley configuration of the first pulley group 23 and the second pulley group 24, different multipliers can be configured. The speed of the firing element 13 is multiplied by the pulley group, and the high-speed movement impacts the muzzle ejected from the magazine, passing through the nail in the nail slot to drive the nail.

[0026] During the energy storage phase, the travel distance of the firing element 13 and the compression distance of the elastic energy storage body 26 are multiples of each other (depending on the pulley configuration). A smaller compression distance of the elastic energy storage body 26 allows for a larger travel distance of the firing element 13, enabling the driving of nails of different lengths. The release direction of the elastic energy storage body 26 is related to the nail driving direction, achieving a balance between driving force and rebound force. This results in a very small rebound force, reducing fatigue and improving the user experience when used as a handheld tool, while also reducing energy consumption.

[0027] In one embodiment of this invention, the drive mechanism includes a motor 15, a reduction gearbox 16, and a drive shaft 17. The motor 15 is mounted on the nozzle holder 11 and drives the drive shaft 17 through the reduction gearbox 16. An incomplete gear 14 is mounted on the drive shaft 17 and is driven to rotate by the drive shaft 17. During the rotation of the drive shaft 17, the toothed and toothless sections of the incomplete gear 14 can alternately engage and disengage with the firing teeth of the firing element 13. When the toothed section of the incomplete gear 14 begins to engage with the firing element 13, the movable seat 22 is in its maximum retracted position. When the engagement between the toothed section of the incomplete gear 14 and the firing teeth of the firing element 13 just disengages, the firing element 13 is located in a preset retracted position. At this time, the firing element 13 enters the firing stage and fires. Driven by the motor 15, the firing element 13 drives the pulley belt 25, compresses the elastic energy storage body 26 through the movable seat 22 to store energy, and amplifies the stroke of the pulley group to achieve a large firing stroke with a small compression stroke, thereby increasing the firing speed and nail penetration. At the same time, the kinetic energy release direction of the elastic energy storage body 26 is opposite to the firing direction, which effectively balances the nail driving force, makes the rebound force very small, greatly improves the operating comfort and reduces energy consumption.

[0028] In one embodiment of this example, the number and arrangement of pulleys in the first pulley group 23 and the second pulley group 24 can be arbitrarily combined as needed; including but not limited to one or more pulley groups, and their arrangement includes but not limited to one layer and multiple layers; the arrangement and number of movable pulleys and fixed pulleys in the pulley group can be arbitrarily adjusted according to actual needs; under the action of the pulley group, the movement stroke of the firing member 13 and the compression and release stroke of the elastic energy storage body 26 are multiples of each other.

[0029] In one embodiment of this example, the elastic energy storage body 26 includes, but is not limited to, steel springs, gas springs, and liquid springs.

[0030] In one embodiment of this example, the elastic energy storage body 26 includes, but is not limited to, a combination of one or more elastic energy storage bodies 26.

[0031] In one embodiment of this example, the resultant force center axis of the elastic energy storage body 26 is parallel to the center line of the firing element 13.

[0032] In one embodiment of this example, the first pulley group 23 and the second pulley group 24 each include one or more pulleys arranged axially symmetrically about the resultant force center axis of the elastic energy storage body 26.

[0033] In one embodiment of this invention, both the first pulley group 23 and the second pulley group 24 include one or more pulleys symmetrically arranged around the force center line of the compression spring (including single springs and multiple springs) as an axis of symmetry. By adjusting the number of pulleys in each group, the ratio between the firing speed of the firing element 13 and the release speed of the elastic energy storage body 26 can be adjusted. The scaling stroke S2 ​​of the elastic energy storage body 26 and the movement stroke S1 of the firing element 13 are also in a multiple relationship, as shown in the appendix. Figure 5 The specific multiplier can be adjusted according to different product models. The multiplier is related to the number and arrangement of pulleys. The number and arrangement of pulleys are set according to actual needs and are all within the scope of protection of this patent.

[0034] In one embodiment of this invention, the tail of the firing element 13 is in contact with the pulley belt 25.

[0035] In one embodiment of this example, the pulley belt 25 is a flexible belt.

[0036] In one embodiment of this example, one end of the elastic energy storage body 26 is mounted on the fixed base 21, and the other end is mounted on the movable base 22.

[0037] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are merely for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An energy storage firing device for an electric nail gun, characterized in that, include: The firing unit (1) includes a muzzle holder (11), a muzzle clip assembly (12), a firing element (13), and a transmission component. The firing element (13) is mounted on the muzzle holder (11) and can move back and forth in the muzzle groove of the muzzle clip assembly (12) along the firing direction. The firing element (13) has meshing teeth. The transmission component includes a drive mechanism and an incomplete gear (14). The incomplete gear (14) engages with and disengages from the meshing teeth of the firing element (13) under the drive of the drive mechanism, thereby driving the firing element (13) to move backward to a set position to complete energy storage. After reaching the set position, it disengages to enter a new firing state and completes a nail-driving process. The energy storage unit (2) includes a fixed base (21), a movable base (22), a first pulley block (23), a second pulley block (24), a pulley belt (25), and an elastic energy storage body (26). The movable base (22) is capable of moving back and forth along the firing direction, and the movable base (22) has a maximum forward position and a maximum backward position in its movement stroke. The first pulley block (23) is disposed on the fixed base (21), and the second pulley block (24) is disposed on the movable base (22). The pulley belt (25) is wound around the first pulley block (23). On the second pulley group (24); the elastic energy storage body (26) is used to maintain the movable seat (22) in the maximum backward position and tension the pulley belt (25) so that the pulley belt (25) is in contact with the firing member (13); the pulley belt (25) moves backward under the push of the firing member (13), and in conjunction with the transmission of the first pulley group (23) and the second pulley group (24), drives the movable seat (22) to move forward to compress the elastic energy storage body (26) to start storing energy. The compression direction of the elastic energy storage body (26) is opposite to the movement direction of the firing member (13).

2. The energy storage firing device according to claim 1, characterized in that, The number and arrangement of pulleys in the first pulley group (23) and the second pulley group (24) can be arbitrarily combined as needed; including but not limited to one or more pulley groups, and their arrangement includes but not limited to one layer and multiple layers; the arrangement and number of movable pulleys and fixed pulleys in the pulley group can be arbitrarily adjusted according to actual needs; under the action of the pulley group, the movement stroke of the firing element (13) and the compression and release stroke of the elastic energy storage body (26) are multiples of each other.

3. The energy storage firing device of the electric nail gun according to claim 1, characterized in that, The elastic energy storage body (26) includes, but is not limited to, steel springs, gas springs and liquid springs.

4. The energy storage firing device of the electric nail gun according to claim 1, characterized in that, The elastic energy storage body (26) includes, but is not limited to, a combination of one or more of the elastic energy storage bodies (26).

5. The energy storage firing device of the electric nail gun according to claim 1, characterized in that, The resultant force center axis of the elastic energy storage body (26) is parallel to the center line of the firing element (13).

6. The energy storage firing device of the electric nail gun according to claim 1, characterized in that, The first pulley group (23) and the second pulley group (24) each include one or more pulleys arranged symmetrically about the resultant force center axis of the elastic energy storage body (26).

7. The energy storage firing device of the electric nail gun according to claim 1, characterized in that, The tail of the firing element (13) is in contact with the pulley belt (25).

8. The energy storage firing device of the electric nail gun according to claim 1, characterized in that, The pulley belt (25) is a flexible belt.

9. The energy storage firing device of the electric nail gun according to claim 1, characterized in that, One end of the elastic energy storage body (26) is mounted on the fixed base (21), and the other end is mounted on the movable base (22).

10. The energy storage firing device of the electric nail gun according to claim 1, characterized in that, The drive mechanism includes a motor (15), a gearbox (16), and a drive shaft (17). The motor (15) is mounted on the nozzle seat (11). The motor (15) drives the drive shaft (17) through the gearbox (16). The incomplete gear (14) is mounted on the drive shaft (17) and is driven to rotate by the drive shaft (17).

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