Firing self-locking structure of axial nailer

Abstract

The utility model discloses a kind of firing self-locking structure of axial nail gun, it is related to nail fastening technical field, including main cover, the self-locking ring that is equipped with the automatic locking of the limit pin after firing by torsional spring on main cover, the guide groove that is equipped with cooperation with limit pin on self-locking ring, the front end of guide groove is equipped with unlocking groove and locking groove respectively on upper and lower sides, self-locking ring has unlocking state and locking state, when self-locking ring is rotated by external force, it can be switched from locking state to unlocking state, limit pin is locked in the front end of axial limit slot by locking groove in locking state, limit pin enters from locking groove into unlocking groove and is unlocked in unlocking state.The utility model is additionally equipped with the self-locking structure that cooperation with limit pin on main cover, make axial nail gun in each use time all need manual unlocking to be able to fire, and limit pin can be automatically locked after firing, solve the technical problem that existing axial nail gun is easily hurt when accidentally falling, guarantee the safety when axial nail gun is used.

Description

Technical Field

[0001] This utility model relates to the field of nail fastening technology, specifically to a firing self-locking structure for an axial nail gun. Background Technology

[0002] Nail-shot fastening technology is a highly efficient fastening technique. Its working principle involves using a nail gun to fire a nail cartridge, and the energy generated by the cartridge's explosion rapidly drives the nail into a hard substrate such as steel, concrete, or brickwork. Compared to traditional fastening methods, nail-shot fastening technology has significant advantages such as self-sufficient power source, ease of operation, low labor intensity, fast construction speed, and high safety and reliability, thus it is being used in an increasing number of engineering projects.

[0003] Currently, most nail guns on the market are axial in structure. For example, patent document CN109940557A discloses a quick-release axial nail gun. This type of axial nail gun typically includes a main sleeve, a movable sleeve, a nail tube, a firing pin body (including a pin shaft and a pin seat), a firing pin sleeve, a firing pin (braking pin), a cylindrical pin (limiting pin), and a spring. The limiting pin is simultaneously inserted into a positioning pin hole in the firing pin body, a strip hole symmetrically located in the firing pin sleeve, and an axial limiting groove symmetrically located on the rear section of the main sleeve. This limits the axial movement of the firing pin body and ensures stable and reliable firing of the axial nail gun. However, according to feedback from construction workers, the nail gun often falls accidentally during actual construction. Furthermore, actual tests have shown that when an axial nail gun with an integrated nail (with the nail tube facing downwards) falls downwards at an angle of 45 to 90 degrees and touches the ground, the integrated nail will be accidentally fired under its own weight. This can cause the nail to fly out at any angle, which can easily cause personal injury to nearby construction workers and poses a significant safety hazard.

[0004] Therefore, it is necessary to develop a new technology that requires manual unlocking before firing and automatic locking after firing to solve the above-mentioned technical problems. Utility Model Content

[0005] This invention addresses the shortcomings and defects of the existing technology by proposing a self-locking firing structure for an axial nail gun. The invention adds a self-locking structure to the main sleeve that engages with a limiting pin, requiring manual unlocking before firing each time the axial nail gun is used. After firing, the limiting pin is automatically locked, effectively preventing injury to construction workers caused by accidental drop and firing of the axial nail gun. This solves the technical problem of easy injury from accidental drop of existing axial nail guns and ensures safety during use.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A self-locking structure for firing an axial nail gun includes a main sleeve. The main sleeve has a self-locking ring located at the front end of an axial limiting groove, which is provided by a torsion spring to automatically lock the limiting pin after firing. The self-locking ring has a guide groove that cooperates with the limiting pin. The front end of the guide groove has an unlocking groove and a locking groove on its upper and lower sides, respectively. The self-locking ring has an unlocked state and a locked state. When the self-locking ring is rotated by an external force, it can switch from the locked state to the unlocked state. In the locked state, the limiting pin is locked in the front end of the axial limiting groove by the locking groove. In the unlocked state, the limiting pin moves from the locking groove into the unlocking groove to unlock.

[0007] The centerline of the guide groove and the centerline of the axial limiting groove intersect in the same orthographic projection plane. The upper side of the guide groove has a downwardly protruding rotating protrusion. When the limiting pin moves backward relative to the guide groove, it drives the self-locking ring to rotate through the rotating protrusion.

[0008] The lower side of the guide groove is an inclined straight side. After the axial nail gun is fired, the limiting pin moves along the lower side into the locking groove.

[0009] The upper and lower rear ends of the guide groove are connected by an arc shape.

[0010] An anti-rotation protrusion is provided between the unlocking groove and the locking groove, and the anti-rotation protrusion is located above the front end of the center line of the guide groove.

[0011] The guide grooves on the self-locking ring are respectively set at both ends of the limiting pin, and the guide grooves can coincide when rotated along the central axis of the self-locking ring.

[0012] The self-locking ring includes an integrally formed front operating ring and a rear control ring. The outer diameter of the front operating ring is larger than that of the rear control ring. The front operating ring is provided with anti-slip texture, and the guide groove is opened from the front end of the rear control ring to the rear end.

[0013] The front end of the axial limiting groove on the main sleeve is provided with an outer step, and an inner step is provided between the front operating ring and the rear control ring of the self-locking ring. The torsion spring is provided between the inner step and the outer step, and the two ends of the torsion spring are respectively fixed on the main sleeve and the self-locking ring.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The core concept of this utility model lies in adding a self-locking ring to the main sleeve, which cooperates with the limiting pin. This ensures that the axial nail gun requires manual unlocking before firing each time it is used, and automatically locks the limiting pin after firing. Before each firing and unlocking, the limiting pin, firing pin body, firing pin sleeve, and other related structural components are locked and cannot move. At this time, the axial nail gun is in a non-firing state. Even if the axial nail gun is accidentally dropped, it will not detonate the nail cartridge. This effectively prevents injuries caused by accidental dropping and detonation of the nail cartridge, thus significantly improving the safety of using the axial nail gun. When aligning with the substrate to prepare for firing, the self-locking ring needs to be manually rotated to unlock. This not only avoids personal safety risks caused by accidental firing but also has the advantages of simple structure, easy operation, strong practicality, and high reliability.

[0015] 2. In this utility model, the guide groove is inclined relative to the axial limiting groove, and a rotating protrusion that cooperates with the limiting pin is provided on the upper side of the guide groove. This structure can drive the self-locking ring to rotate when the limiting pin moves backward relative to the guide groove for firing. This is beneficial for the limiting pin to automatically enter the locking groove along the lower side of the guide groove after firing to achieve locking. This ensures that the axial nail gun is always in a locked state that cannot be fired before unlocking. This process does not require manual operation and avoids the safety function becoming useless due to human negligence.

[0016] 3. This utility model uses anti-rotation protrusions to position the self-locking ring, enabling the self-locking ring to remain stable in the corresponding unlocked or locked state.

[0017] 4. The present invention sets the anti-rotation protrusion above the front end of the center line of the guide groove. This structure makes the front side of the locking groove have a certain height, which is conducive to the automatic and accurate entry of the limit pin into the locking groove after firing under the action of the torsion spring.

[0018] 5. This utility model uses guide grooves to lock both ends of the limiting pin, which has the advantages of stable and reliable structure and uniform force on the limiting pin.

[0019] 6. This utility model uses a front operating ring and anti-slip texture to facilitate the control of the self-locking ring rotation, making the switching between unlocking and locking states simpler and more convenient.

[0020] 7. This utility model achieves the installation and fixation of the torsion spring by using the outer step on the main sleeve and the inner step on the self-locking ring, so that the torsion spring is set in a relatively closed space, which is beneficial to protect the torsion spring and can also provide a stable and reliable self-locking effect for the self-locking ring.

[0021] 8. This invention also has the advantage of enabling rapid ejection of the cartridge case while in a locked state. In some cases, the cartridge case may be tightly stuck inside the nail tube sleeve. If the limiting pin and firing pin are not locked, the firing pin will move backward with the nail tube sleeve during compression, preventing the cartridge case from being ejected. Conversely, because both the limiting pin and firing pin are locked in this invention, the firing pin cannot move backward during nail tube sleeve compression, thus effectively ejecting the cartridge case from the sleeve. Attached Figure Description

[0022] Figure 1 This is a planar structural diagram of the present invention in the unlocked state; Figure 2 This is a plan view of the present invention in the locked state; Figure 3 for Figure 1 A sectional view; Figure 4 This is a planar structural diagram of the self-locking ring in this utility model; Figure 5 This is a three-dimensional structural diagram of the self-locking ring in this utility model; Figure 6 This is a three-dimensional structural diagram of the main sleeve in this utility model.

[0023] The markings in the diagram are as follows: 1. Main sleeve, 2. Axial limiting groove, 3. Self-locking ring, 4. Torsion spring, 5. Limiting pin, 6. Guide groove, 7. Unlocking groove, 8. Locking groove, 9. Upper side, 10. Lower side, 11. Rotating protrusion, 12. Anti-rotation protrusion, 13. Front operating ring, 14. Rear control ring, 15. Outer step, 16. Silencing sleeve assembly, 17. Pin tube sleeve, 18. Firing pin sleeve, 19. Movable sleeve, 20. Return spring, 21. Firing pin body, 22. Firing spring, 23. Brake pin, 24. Connecting handle. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0025] See Figures 1-6 This utility model provides a self-locking firing structure for an axial nail gun, including a main sleeve 1. The main sleeve 1 contains a firing pin sleeve 18 and a firing pin body 21. The main sleeve 1 has an axial limiting groove 2, and a limiting pin 5 passing through the firing pin sleeve 18 and the firing pin body 21 is provided within the axial limiting groove 2. Crucially, at the front end of the axial limiting groove 2, the main sleeve 1 has a self-locking ring 3, which, via a torsion spring 4, automatically locks the limiting pin 5 after firing. The self-locking ring 3 has a guide groove 6 that cooperates with the limiting pin 5. Figure 1As shown, the guide groove 6 is inclined along the axial direction of the self-locking ring 3. Its length is preferably such that it does not affect the normal operation of the limiting pin 5, and the center line of the guide groove 6 intersects the center line of the axial limiting groove 2 in the same orthographic projection plane. The front end (left end) of the guide groove 6 is provided with an unlocking groove 7 and a locking groove 8 on its upper and lower sides, respectively. The self-locking ring 3 has an unlocked state and a locked state. When the self-locking ring 3 is rotated by an external force, it can switch from the locked state to the unlocked state. After firing is completed and the external force is lost, the self-locking ring 3 can automatically enter the locked state under the action of the torsion spring 4. In the locked state, the limiting pin 5 is locked in the front end of the axial limiting groove 2 by the locking groove 8. At this time, neither the firing pin sleeve 18 nor the firing pin body 21 can move, and the axial nail gun cannot be fired. In the unlocked state, the limiting pin 5 moves from the locking groove 8 into the unlocking groove 7 to unlock. At this time, both the firing pin sleeve 18 and the firing pin body 21 can be controlled to move, and the axial nail gun is in a firing state.

[0026] Those skilled in the art will understand that both the locking and unlocking states are achieved by the self-locking ring 3 acting on the limiting pin 5 through the locking groove 8 and the unlocking groove 7, respectively. Since the limiting pin 5 can only move back and forth along the axial limiting groove 2, the limiting pin 5 moves from the locking groove 8 to the unlocking groove 7 by rotating the self-locking ring 3 relative to each other.

[0027] In one specific embodiment, see Figures 1-2 , Figure 4 The upper side 9 of the guide groove 6 has a downwardly protruding rotating protrusion 11, which is arc-shaped and forms after the front section of the upper side 9 connects upward with the side of the unlocking groove 7. The lower side 10 of the guide groove 6 is an inclined straight side. When the axial nail gun is ready to fire after unlocking, the limiting pin 5 will move backward along the upper side 9 of the guide groove 6 relative to the guide groove 6. After firing, the limiting pin 5 will move forward along the lower side 10 of the guide groove 6 relative to the guide groove 6. When the limiting pin 5 moves backward, the limiting pin 5 will drive the self-locking ring 3 to rotate through the rotating protrusion 11. This action can make the self-locking ring 3 rotate at a certain angle during firing, so that when the limiting pin 5 moves forward to the front of the front end of the lower side 10 after firing, it can automatically enter the locking groove 8 under the action of the torsion spring 4 to lock, ensuring that it will not accidentally fall and fire before the next use.

[0028] In this embodiment, see Figures 1-2 , Figure 4 The rear end of the upper side 9 of the guide groove 6 and the rear end of the lower side 10 are connected by an arc shape, which facilitates the fabrication and improves the structural stability.

[0029] In one specific embodiment, see Figures 1-2 , Figure 4An anti-rotation protrusion 12 is provided between the unlocking groove 7 and the locking groove 8, and the anti-rotation protrusion 12 is located above the front end of the center line of the guide groove 6. This structure makes the front side of the locking groove 8 have a certain length, so that the limiting pin 5 after firing can automatically and accurately enter the locking groove 8 under the action of the torsion spring 4.

[0030] In one specific embodiment, see Figure 4 , Figure 5 The self-locking ring 3 has two guide grooves 6, which are respectively located at both ends of the limiting pin 5. Rotating one guide groove 6 along the central axis of the self-locking ring 3 allows the two guide grooves 6 to overlap. The two guide grooves 6 can simultaneously lock and unlock the limiting pin 5, improving the stability of the unlocking and locking structure and ensuring even force distribution on the limiting pin 5. Of course, in some special cases, the number of guide grooves 6 can also be one, and locking and unlocking can be achieved by acting on one end of the limiting pin 5.

[0031] In one specific embodiment, see Figures 1-5 The self-locking ring 3 includes an integrally formed front operating ring 13 and a rear control ring 14. The outer diameter of the front operating ring 13 is larger than that of the rear control ring 14. The front operating ring 13 is provided with anti-slip texture to facilitate stable and reliable rotation of the self-locking ring 3. The guide groove 6 is opened from the front end to the rear end of the rear control ring 14, which can achieve a compact, reasonable and stable and reliable fit with the main sleeve 1 and the limit pin 5.

[0032] In one specific embodiment, see Figure 3 , Figure 5 The axial limiting groove 2 on the main sleeve 1 has an outer step 15 at its front end, and an inner step is provided between the front operating ring 13 and the rear control ring 14 of the self-locking ring 3. The torsion spring 4 is located between the inner step and the outer step 15 and between the front operating ring 13 and the main sleeve 1. The two ends of the torsion spring 4 are fixed to the main sleeve 1 and the self-locking ring 3 respectively, so that the limiting pin 5 automatically enters the locking groove 8 after firing.

[0033] When the self-locking firing structure provided by this utility model is applied to an axial nail gun, see [reference needed]. Figures 1-3 Its structure may include: a silencer sleeve assembly 16, a nail tube sleeve 17, a firing pin sleeve 18, a movable sleeve 19, a return spring 20, a firing pin body 21, a firing spring 22, a brake pin 23, a connecting handle 24 and other structural components. The structure, position and connection relationship of the aforementioned components are all existing conventional technologies and will not be described in detail.

[0034] The implementation principle of this utility model is as follows: When using an axial nail gun with the aforementioned self-locking firing structure, the integrated nail can be first inserted into the nail tube sleeve 17, and the nail tube sleeve 17 can be aligned with the substrate. Then, the self-locking ring 3 can be manually rotated to switch it from the locked state to the unlocked state. Figure 1 The device is fired from the unlocked state. After firing, the limiting pin 5 will move forward along the lower side 10 and reset under the action of the return spring 20. At the same time, the self-locking ring 3 will rotate and reset under the action of the torsion spring 4. When the limiting pin 5 has moved completely to the front of the lower side 10, the limiting pin 5 will be automatically locked by the locking groove 8 at the front end of the axial limiting groove 2 under the action of the torsion spring 4, so that the self-locking ring 3 can automatically enter the locked state after firing. This utility model, by using a self-locking ring 3 with a specific structure and cooperating with the torsion spring 4, can ensure that the axial nail gun is always in a locked state that cannot be fired before unlocking, and this process does not require manual operation, avoiding human negligence that could render the safety function useless, and effectively improving the safety of using the axial nail gun.

[0035] The above description is only a specific embodiment of this utility model. Any feature disclosed in this specification may be replaced by other equivalent features unless otherwise specified. All features or steps in all methods or processes disclosed may be combined in any way except for mutually exclusive features and / or steps.

Claims

1. A self-locking structure for firing an axial nail gun, comprising a main sleeve (1), wherein the main sleeve (1) is provided with a self-locking ring (3) at the front end of the axial limiting groove (2) via a torsion spring (4) to automatically lock the limiting pin (5) after firing. The self-locking ring (3) is provided with a guide groove (6) that cooperates with the limiting pin (5). The front end of the guide groove (6) is provided with an unlocking groove (7) and a locking groove (8) on the upper and lower sides respectively. The self-locking ring (3) has an unlocked state and a locked state. When the self-locking ring (3) is rotated by an external force, it can switch from the locked state to the unlocked state. In the locked state, the limiting pin (5) is locked in the front end of the axial limiting groove (2) by the locking groove (8). In the unlocked state, the limiting pin (5) enters the unlocking groove (7) from the locking groove (8) to unlock.

2. The self-locking firing structure of the axial nail gun according to claim 1, characterized in that: The centerline of the guide groove (6) intersects the centerline of the axial limiting groove (2) in the same orthographic projection plane. The upper side (9) of the guide groove (6) has a downward protruding rotating protrusion (11). When the limiting pin (5) moves backward relative to the guide groove (6), it drives the self-locking ring (3) to rotate through the rotating protrusion (11).

3. The self-locking firing structure of the axial nail gun according to claim 1, characterized in that: The lower side (10) of the guide groove (6) is an inclined straight side. After the axial nail gun is fired, the limiting pin (5) moves along the lower side (10) into the locking groove (8).

4. The self-locking firing structure of the axial nail gun according to claim 1, characterized in that: The rear end of the upper side (9) of the guide groove (6) and the rear end of the lower side (10) are connected by an arc.

5. The self-locking firing structure of the axial nail gun according to claim 1, characterized in that: An anti-rotation protrusion (12) is provided between the unlocking groove (7) and the locking groove (8), and the anti-rotation protrusion (12) is located above the front end of the center line of the guide groove (6).

6. The self-locking firing structure of the axial nail gun according to claim 1, characterized in that: The guide grooves (6) on the self-locking ring (3) are respectively set at both ends of the limiting pin (5), and the guide grooves (6) can overlap when rotated along the central axis of the self-locking ring (3).

7. The self-locking firing structure of the axial nail gun according to any one of claims 1-6, characterized in that: The self-locking ring (3) includes an integrally formed front operating ring (13) and a rear control ring (14). The outer diameter of the front operating ring (13) is larger than the outer diameter of the rear control ring (14). The front operating ring (13) is provided with anti-slip texture, and the guide groove (6) is opened from the front end of the rear control ring (14) towards the rear end.

8. The self-locking firing structure of the axial nail gun according to claim 7, characterized in that: The front end of the axial limiting groove (2) on the main sleeve (1) is provided with an outer step (15), and an inner step is provided between the front operating ring (13) and the rear control ring (14) of the self-locking ring (3). The torsion spring (4) is set between the inner step and the outer step (15), and the two ends of the torsion spring (4) are fixed on the main sleeve (1) and the self-locking ring (3) respectively.

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