A striker locking structure of a nail gun

Abstract

The present application provides a kind of punch needle locking structure of nailer, belong to nailer technical field.It solves how to improve the service life of nailer.The punch needle locking structure of this nailer, nailer includes inner casing and can be moved relative to inner casing and is used for nailing punch needle, inner casing is also provided with locking piece for indirectly or directly locking punch needle, inner casing is also provided with driving mechanism and top shaft that can move along the vertical direction of inner casing under the driving of driving mechanism, top shaft is connected with locking piece, when punch needle is unlocked, top shaft and locking piece can move along the vertical direction of inner casing and move away from punch needle.The disengagement speed of the locking piece of this scheme is fast, reduces the contact between locking piece and punch needle or locking piece, punch needle and other components, slows down the wear of locking piece and punch needle or locking piece, punch needle and other components, improves the service life of nailer.

Description

Technical Field

[0001] This invention belongs to the field of nail gun technology, and relates to a nail gun, and particularly to a nail gun firing pin locking structure. Background Technology

[0002] Nail guns are modern nail fastening technology products that fire nails using a direct bonding technology. They are essential hand tools for carpentry, construction, and other industries. Currently, most nail guns on the market are pneumatic nail guns. Pneumatic nail guns work by using high-pressure gas generated by an air pump (air compressor) as a power source. When the gas is generated, the firing pin is in a locked state. When the firing pin unlocks, the high-pressure gas drives the firing pin in the nail gun cylinder to perform a hammering motion, driving the nail from the nail slot into the object or firing a row of nails. Due to the high-pressure gas acting on the firing pin, the unlocking and locking of the firing pin are subject to significant friction. Wear and tear on the firing pin during use may eventually lead to the failure of the firing pin locking mechanism.

[0003] The applicant has proposed a design scheme for the locking structure of the firing pin. Chinese Patent [Application No.: 201910099968.7] discloses a nail gun, which includes a housing and a firing pin that can reciprocate relative to the housing. The housing is provided with a locking member and an intermediate member that can move relative to the housing. The intermediate member is located between the locking member and the firing pin. The intermediate member has a locking part one and a locking part two that can be locked onto the firing pin. The locking member can abut against the locking part one and prevent the intermediate member from moving relative to the housing so that the locking part two is locked onto the firing pin, or the locking member can release the obstruction so that the locking part two can move and disengage from the firing pin.

[0004] In the above structure, when the hinge rod rotates to the position of the lever, it triggers the lever to drive the locking member to rotate. At this time, the locking member can release its obstruction of the intermediate member, allowing the intermediate member to rotate relative to the housing under the push of the firing pin and overcome the elastic force of the torsion spring to disengage from the firing pin until the second blocking surface on the locking member contacts and abuts against the anti-reverse surface on the intermediate member. In the above structure, the intermediate member unlocks by rotation. During the unlocking process, it still has a relatively long contact time with the groove of the firing pin, resulting in significant friction. At the same time, the contact time between the intermediate member and the locking member is also relatively long, which accelerates the wear of the firing pin, intermediate member, and locking member, reducing the service life of the nail gun. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a firing pin locking structure for nail guns. The technical problem this invention aims to solve is: how to improve the service life of nail guns.

[0006] The objective of this invention can be achieved through the following technical solution: a firing pin locking structure for a nail gun, the nail gun including an inner housing and a firing pin that can move relative to the inner housing and is used for nailing, the inner housing also being provided with a locking member for indirectly or directly locking the firing pin, characterized in that the inner housing is further provided with a driving mechanism and a top shaft that can move along the vertical direction of the inner housing under the drive of the driving mechanism, the top shaft being connected to the locking member, and when the firing pin is unlocked, the top shaft and the locking member can move along the vertical direction of the inner housing and away from the firing pin.

[0007] In this solution, during the firing pin unlocking process, the top shaft and locking component can move vertically along the inner housing and away from the firing pin, i.e., the locking component and top shaft move upwards or downwards from the inner housing. The locking component disengages quickly, reducing contact between the locking component and the firing pin, or between the locking component, the firing pin, and other components, thus slowing down wear and tear and improving the service life of the nail gun. This solution provides a technical approach with a different concept, achieving the level of existing technology.

[0008] In the aforementioned nail gun firing pin locking structure, the driving mechanism includes a turntable located within the inner housing. The turntable has at least one boss. One end of the top shaft is connected to a locking element, and the other end of the top shaft has a stop block that abuts against the boss. After the stop block contacts the boss, both the top shaft and the locking element move vertically upwards along the inner housing, unlocking the firing pin. When the stop block separates from the boss, the firing pin can relock or continue moving. During the continued movement of the firing pin, it does not contact other objects in the locking structure. In this design, the movement and reset of the locking element are controlled by the top shaft, resulting in a simple structure and ensuring smooth locking and unlocking of the firing pin.

[0009] In the aforementioned nail gun's firing pin locking structure, a return spring for resetting the top shaft is provided on the top shaft. One end of the return spring abuts against or is fixed to the top shaft, while the other end abuts against the inner housing. The return spring is used for resetting the top shaft in the vertical direction.

[0010] In the above-mentioned nail gun firing pin locking structure, the locking member directly locks the firing pin, and the firing pin is also provided with a groove. The locking member includes a locking part. When the firing pin is locked, the locking part is located in the groove and directly locks the firing pin; when the firing pin is unlocked, the locking part is located above or below the groove.

[0011] In the aforementioned nail gun firing pin locking structure, the inner housing is further provided with a fixing block near the locking member. The fixing block and the locking member are located on the same side of the firing pin, with the fixing block further away from the firing pin than the locking member. When the firing pin is locked, parts of the fixing block, the locking member, and the firing pin are on the same horizontal plane. The fixing block prevents the locking member from moving horizontally, thus improving the locking effect of the locking member on the firing pin.

[0012] In the aforementioned nail gun firing pin locking structure, the parts of the fixing block and the locking member that contact each other are all inclined surfaces and match; or the fixing block or the locking member has an inclined surface. The fixing block has an inclined surface, and the upper side of the inclined surface is farther away from or closer to the locking member than the lower side. This structure is beneficial because when the locking member moves vertically towards the inner housing, the locking member is less likely to jam, and it provides a certain guiding effect for the movement of the locking member.

[0013] In the aforementioned nail gun firing pin locking structure, the locking member indirectly locks the firing pin. The firing pin has a groove, and an intermediate member is provided between the locking member and the firing pin. The intermediate member has a locking part one and a locking part two that can be engaged with the firing pin. The locking member can abut against the locking part one and prevent the intermediate member from moving relative to the inner housing, keeping the locking part two engaged with the groove of the firing pin. A rotating shaft is rotatably connected to the inner housing. A torsion spring with one end abutting against the inner housing is sleeved on the rotating shaft, and the other end of the torsion spring is fixed to the rotating shaft. The intermediate member is connected to the rotating shaft. When the firing pin is unlocked, the locking member is located above or below the intermediate member. When the firing pin is unlocked, it drives the intermediate member to rotate. During the firing pin unlocking process, the intermediate member and the locking member are no longer in contact, which reduces the wear of the intermediate member and the locking member and improves the service life of the nail gun.

[0014] In the aforementioned nail gun firing pin locking structure, a limiting shaft is also connected to the inner housing, and the locking member has a limiting hole that matches the limiting shaft, with the limiting shaft located within the limiting hole. The limiting shaft and the limiting hole work together to prevent the locking member from rotating in the horizontal direction. When the firing pin is locked, the locking member abuts against the intermediate member, improving the locking effect of the intermediate member on the firing pin.

[0015] In the aforementioned nail gun firing pin locking structure, the inner housing is further provided with a turntable connected to the motor output shaft. The turntable is provided with a boss. The top shaft is fixedly connected to the locking member. The top shaft is provided with a return spring at one end that can abut against the inner housing. The other end of the return spring abuts against the limiting platform of the top shaft. The locking member is also connected with an abutting shaft. One end of the abutting shaft is provided with an ejector block. The ejector block can abut against the boss.

[0016] In the aforementioned nail gun firing pin locking structure, the periphery of the boss and the abutment block is arc-shaped, and the top shaft is provided with a limiting platform or a fixing hole. The return spring abuts against the limiting platform or is fixed in the fixing hole. The arc-shaped periphery of the boss and the abutment block provides a certain guiding and buffering effect for the abutment block and the movement onto the boss, making the movement of the locking component smoother.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. During the firing pin unlocking process, the top shaft and locking component can move vertically along the inner housing and away from the firing pin, i.e., the locking component and top shaft move upwards towards the inner housing. The locking component disengages quickly, reducing contact between the locking component and the firing pin, or between the locking component, the firing pin, and other components. This slows down wear on the locking component and the firing pin, or between the locking component, the firing pin, and other components, thus improving the service life of the nail gun. This solution provides a technical approach with a different concept, achieving the level of existing technology.

[0019] 2. The periphery of the boss and the abutment block is arc-shaped, which plays a certain guiding and buffering role in the movement of the abutment block and the ejector block to the boss, making the movement of the locking parts smoother. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 3 This is a partial structural schematic diagram of Embodiment 1 of the present invention;

[0023] Figure 4 This is a partial structural schematic diagram of Embodiment 1 of the present invention;

[0024] Figure 5 This is a partial structural schematic diagram of Embodiment 1 of the present invention;

[0025] Figure 6 This is a partial structural schematic diagram of Embodiment 2 of the present invention;

[0026] Figure 7 This is a partial structural schematic diagram of Embodiment 2 of the present invention;

[0027] Figure 8 This is a cross-sectional structural diagram of Embodiment 2 of the present invention;

[0028] Figure 9 This is a partial structural schematic diagram of Embodiment 2 of the present invention.

[0029] In the diagram, 1a is the inner shell; 1b is the outer shell; 2 is the firing pin; 21 is the groove; 3 is the locking element; 31 is the locking part; 32 is the locking hook part; 321 is the first blocking surface; 322 is the second blocking surface; 33 is the limiting hole; 4 is the top shaft; 41 is the abutment block; 42 is the limiting platform; 5 is the turntable; 51 is the boss; 511 is the first boss; 512 is the second boss; 6 is the intermediate part; 61 is the first locking part; 611 is the anti-reverse surface; 612 is the abutment surface; 62 is the second locking part. 7. Rotating shaft; 8. Limiting shaft; 9. Fixing block; 10. Return spring; 11. Torsion spring; 12. Blocking plate; 13. Motor; 14. Gear reducer; 15. Crank; 16. Piston rod; 17. First piston; 18. First cylinder; 18a. First air chamber; 19. Second cylinder; 19a. Second air chamber; 20. Second piston; 30. Nail box. Detailed Implementation

[0030] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments. Example

[0031] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the nail gun includes an inner housing 1a, an outer housing 1b, and a firing pin 2 that can move relative to the inner housing 1a for nailing. A first cylinder 18 and a second cylinder 19 are also provided within the inner housing 1a. A first piston 17 capable of performing compression and return strokes is provided within the first cylinder 18, and the first piston 17 divides the first cylinder 18 into a first gas chamber 18a for storing gas. A piston rod 16 is connected to the first piston 17, and a crank 15 is connected to the piston rod 16. The drive mechanism includes a motor 13, a gear reducer 14, a turntable 5, and the crank 15. The motor 13, located within the inner housing 1a, is connected to the gear reducer 14. The output shaft of the gear reducer 14 is connected to the crank 15. The piston rod 16 and the crank 15 form a crank-connecting rod structure, converting the rotational power of the motor into the power to drive the first piston to perform linear reciprocating movement. A second piston 20 is provided inside the second cylinder 19, and the firing pin 2 is fixedly connected to the second piston 20. The second piston 20 divides the second cylinder 19 into a second air chamber 19a. The first air chamber 18a and the second air chamber 19a are connected to each other through a fully enclosed ventilation channel. The motor 13 drives the first piston 17 to perform a compression stroke and a return stroke. A nail box 30 is provided at the front end of the inner housing 1a. The nails in the nail box 30 will automatically rise to the front of the firing pin 2 under the action of a spring. After the first piston 17 completes the compression stroke, the firing pin locking structure unlocks, so that both the firing pin 2 and the second piston 20 are in the unlocked state. The second piston 20 moves at high speed under high pressure, driving the firing pin 2 to strike the nail in front of the firing pin 2, completing one nailing action. Afterwards, the first piston 17 performs a return stroke. Under the action of negative pressure, the second piston 20 is pulled back from the position after the firing pin nail is fired back to the position where the firing pin is locked. The firing pin 2 is relocked. This cycle repeats to achieve continuous nailing.

[0032] The firing pin 2 has a groove 21. The inner housing 1a also has a blocking plate 12, a top shaft 4, and a locking member 3. The blocking plate 12 and the locking member 3 are both fixed on the top shaft 4, with the blocking plate 12 located above the locking member 3. The locking member 3 has a locking part 31, and the firing pin 2 has a locking part 31 that matches the shape of the groove 21. The locking member 3 locks the firing pin 2 by engaging with the groove 21 through the locking part 31. The inner housing 1a also has a fixing block 9 near the locking member 3. The fixing block 9 and the locking member 3 are located on the same side of the firing pin 2. The fixing block 9 is farther away from the firing pin 2 than the locking member 3. The contact part between the fixing block 9 and the locking member 3 can be set as an inclined surface and match each other. The upper side of the inclined surface of the fixing block 9 is farther away from the locking member 3 than the lower side. When the firing pin 2 is locked, the fixing block 9, the locking member 3, and a portion of the structure of the firing pin 2 are on the same horizontal plane. The fixing block 9 is used to prevent the locking member 3 from moving in the horizontal direction, thus improving the locking effect of the locking member 3 on the firing pin 2. The fixing block 9 can also be replaced by a structure in which a positioning shaft is provided on the inner housing 1a and a positioning hole is provided on the locking member 3. The positioning shaft is inserted into the positioning hole, and the locking member 3 and part of the firing pin 2 are on the same horizontal plane. The positioning shaft is used to prevent the locking member 3 from rotating in the horizontal direction, and the structure of the positioning hole and the positioning shaft can save space in the locking structure of the firing pin 2.

[0033] like Figure 5 As shown, the inner housing 1a is also provided with a turntable 5 connected to the crank connecting rod mechanism. The turntable 5 is provided with a boss 51. The top shaft 4 is fixedly connected to the locking member 3. The other end of the top shaft 4 is provided with a stop block 41 that can abut against the boss 51. The periphery of the boss 51 and the stop block 41 is arc-shaped. The top shaft 4 is provided with a return spring 10 that can abut against the inner housing 1a at one end. The other end of the return spring 10 abuts against the limiting platform 42 of the top shaft 4.

[0034] The working principle of this embodiment is as follows: When the striker 2 is locked, the abutment block 41 of the top shaft 4 contacts the turntable 5, and the return spring 10 is in a compressed state. Under the action of the return spring 10, the top shaft 4 and the locking member 3 are subjected to a downward force along the inner housing 1a, so that the locking part 31 is located in the groove 21 of the striker 2 and locks the striker 2. When the striker 2 is unlocked, the abutment block 41 of the top shaft 4 abuts against the boss 51, and the top shaft 4 drives the locking member 3 to move upwards along the inner housing 1a, so that the locking part 31 separates from the groove 21 and is finally above the striker 2. As an alternative solution, when the striker 2 is unlocked, the locking part 31 separates from the groove 21 and is finally below the striker 2, and the corresponding drive mechanism is adjusted accordingly. Example

[0035] like Figure 6As shown, the structure of this embodiment is roughly the same as that of Embodiment 1. In this embodiment, the locking member 3 is locked by means of locking the striker 2. An intermediate member 6 is provided between the locking member 3 and the striker 2. A rotating shaft 7 is rotatably connected to the inner housing 1a. The intermediate member 6 is fixed on the rotating shaft 7. A blocking plate 12 is also provided on the rotating shaft 7. The blocking plate 12 is located above the intermediate member 6. A limiting shaft 8 is also connected to the inner housing 1a. A limiting hole 33 matching the limiting shaft 8 is provided on the locking member 3. The limiting shaft 8 is located in the limiting hole 33.

[0036] like Figure 7 As shown, the intermediate component 6 has a locking part 1 61 and a locking part 2 62. The locking part 2 62 can be engaged in the groove 21 of the firing pin 2. The inner side of the locking part 1 61 has a stop surface 621, and the outer side of the locking part 1 61 has a stop surface 622. The locking component 3 has a hook-shaped locking hook part 32. The inner side of the locking hook part 32 has a blocking surface 321, and the outer side of the locking hook part 32 has a blocking surface 322. The inner housing 1a is also connected to a limiting shaft 8. The locking component 3 is provided with a limiting hole 33 that matches the limiting shaft 8. The limiting shaft 8 is located in the limiting hole 33.

[0037] like Figure 8 and Figure 9 As shown, in this embodiment, the boss 51 includes a first boss 511 and a second boss 511. A torsion spring 11 with one end able to abut against the inner housing 1a is sleeved on the rotating shaft 7, and the other end of the torsion spring 11 is fixedly connected to the rotating shaft 7.

[0038] The working principle of this embodiment is as follows: when the striker 2 is locked, the blocking surface 321 can abut against the abutting surface 622 and keep the locking part 62 fixed in the groove 21 of the striker 2; when the striker 2 needs to be unlocked, the abutting block 41 of the top shaft 4 abuts against the first boss 511. At this time, the top shaft 4 drives the locking member 3 to move vertically upward along the inner shell 1a. The locking member 3 is located above the intermediate member 6. The intermediate member 6 is in a state of free rotation in the horizontal direction. The striker 2 moves towards the front end of the inner shell 1a under the drive of the high-pressure gas. The striker 2 causes the locking part 62 to rotate and completely separate from the groove 21. At this time, the rotation... The torsion spring 11 of the moving shaft 7 is in a compressed state, and one end of the torsion spring 11 abuts against the inner housing 1a. In order to maintain a gap between the locking part 2 62 and the firing pin 2, the motor 13 drives the turntable 5 to rotate, the abutting block 41 separates from the first boss 511, and the return spring 10 drives the top shaft 4 and the locking plate to move downwards in the vertical direction along the inner housing 1a. At this time, the blocking surface 322 can abut against the anti-reverse surface 621 and maintain a gap between the intermediate part 6 and the firing pin 2. After the firing pin 2 finishes firing the nail, the abutting block 41 passes through the second boss 512 on the turntable again, finally making the locking part 2 62 fixed again inside the firing pin 2. As an alternative, when the firing pin 2 is unlocked, the locking part 3 is located below the intermediate part 6, and the corresponding drive mechanism is adjusted accordingly. Example

[0039] The structure of Embodiment 3 is basically the same as that of Embodiment 1, except that the inner housing 1a is also provided with a retaining shaft including an ejector block. The ejector block and the locking member 3 are connected. The top shaft 4 is not provided with a retaining block 41. The movement of the locking member 3 is achieved by the ejector block and the boss 51. In this embodiment, the retaining shaft is used to move the locking member vertically upward, and the return spring 10 on the top shaft 4 resets the locking member.

[0040] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0041] Although this document frequently uses terms such as 1. housing; 2. firing pin; 21. groove; 3. locking element; 31. locking part; 32. locking hook part; 321. blocking surface one; 322. blocking surface two; 33. limiting hole; 4. top shaft; 41. abutting block; 42. limiting platform; 5. turntable; 51. boss; 511. first boss; 512. second boss; 6. intermediate part; 61. locking part one; 611. anti-reverse surface; 612. abutting surface; 62. locking part two; 7. rotating shaft; 8. limiting shaft; 9. fixing block; 10. return spring; 11. torsion spring; 12. blocking plate; 13. motor, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A firing pin locking structure for a nail gun, the nail gun comprising an inner housing (1) and a firing pin (2) movable relative to the inner housing (1) and used for nailing, the inner housing (1) further comprising a locking member (3) for indirectly or directly locking the firing pin (2), the inner housing (1) further comprising a driving mechanism and a top shaft (4) movable in the vertical direction of the inner housing (1) under the drive of the driving mechanism, the top shaft (4) being connected to the locking member (3), the driving mechanism comprising a turntable (5) rotatable within the inner housing (1). One end of the top shaft (4) abuts against the upper surface of the turntable (5). The upper surface of the turntable (5) is provided with a boss (51). When the striker (2) is unlocked, the turntable (5) drives the boss (51) to rotate and pushes the top shaft (4) and the locking member (3) to move along the vertical direction of the inner shell (1) away from the striker (2). The locking member (3) indirectly locks the striker (2). The striker (2) is provided with a groove (21). An intermediate member (6) is provided between the locking member (3) and the striker (2). The feature is that... The locking member (3) is provided with a limiting hole (33) that matches the limiting shaft (8). The limiting shaft (8) is located in the limiting hole (33). The intermediate member (6) is provided with a locking part one (61) and a locking part two (62). The locking part two (62) can be engaged in the groove (21) of the firing pin (2). The locking part one (61) has a backstop surface (621) on its inner side and a backing surface (622) on its outer side. The locking member (3) is provided with a hook-shaped locking hook part (32). The locking hook part (32) has a blocking surface one (321) on its inner side and a blocking surface two (322) on its outer side. The boss (51) includes a first boss (511) and a second boss (512). A torsion spring (11) with one end able to abut against the inner housing (1) is sleeved on the rotating shaft (7). The other end of the torsion spring (11) is fixedly connected to the rotating shaft (7).

2. The firing pin locking structure of the nail gun according to claim 1, characterized in that, The top shaft (4) is provided with a reset spring (10) for resetting the top shaft (4). One end of the reset spring (10) abuts against or is fixed on the top shaft (4), and the other end of the reset spring (10) abuts against the inner shell (1).

3. The firing pin locking structure of the nail gun according to claim 1, characterized in that, The locking member (3) directly locks the striker (2). The striker (2) is also provided with a groove (21). The locking member (3) includes a locking part (31). When the striker (2) is locked, the locking part (31) is located in the groove (21) and directly locks the striker (2). When the striker (2) is unlocked, the locking part (31) is located above or below the groove (21).

4. The firing pin locking structure of the nail gun according to claim 3, characterized in that, The inner housing (1) is also provided with a fixing block (9) near the locking member (3). The fixing block (9) and the locking member (3) are located on the same side of the firing pin (2). The fixing block (9) is farther away from the firing pin (2) than the locking member (3). When the firing pin (2) is locked, the fixing block (9), the locking member (3) and the part of the firing pin (2) are on the same horizontal plane.

5. The firing pin locking structure of the nail gun according to claim 4, characterized in that, The parts of the fixing block (9) that come into contact with the locking member (3) are all inclined surfaces and match each other; or the fixing block (9) or the locking member (3) has an inclined surface.

6. The firing pin locking structure of the nail gun according to claim 1, characterized in that, The inner housing (1) is also provided with a turntable (5) connected to the output shaft of the motor (13). The turntable (5) is provided with a boss (51). The top shaft (4) is fixedly connected to the locking member (3). The top shaft (4) is provided with a return spring (10) that can abut against the inner housing (1) at one end. The other end of the return spring (10) abuts against the limiting platform (42) of the top shaft (4). The locking member (3) is also connected with an abutting shaft. One end of the abutting shaft is provided with an ejector block. The ejector block can abut against the boss (51).

7. The firing pin locking structure of the nail gun according to claim 2, characterized in that, The other end of the top shaft (4) is provided with a stop block (41) that can abut against the boss (51). The boss (51) and the stop block (41) are arc-shaped. The top shaft (4) is also provided with a limiting platform (42) or a fixing hole (43). The reset spring (10) abuts against the limiting platform (42) or is fixed in the fixing hole (43).

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