Limiting mechanism of ceiling nail gun

Abstract

The present invention discloses a limit mechanism for a ceiling nailer, which relates to the field of nailing and fastening equipment, and comprises a firing base and a connecting sleeve, wherein the connecting sleeve is installed at the front end of the firing base, and a limit retaining ring is installed on the inner wall of the connecting sleeve; the connected end of the firing base has a firing inner hole, and the inner diameter of the firing inner hole is larger than the inner diameter of the limit retaining ring. The present invention enables the limit retaining ring to directly limit the anti-rotation pin during the forward movement of the firing pin body, thereby simplifying the structure of the ceiling nailer, reducing the production cost and processing accuracy requirements, and improving the production efficiency.

Description

Technical Field

[0001] The invention relates to the field of nail-shooting and fastening equipment, and in particular to a limiting mechanism of a ceiling nail-shooting device. Background Art

[0002] At present, the limiting structures in ceiling nail guns at home and abroad all adopt the method of passing the limiting anti-rotation pin through the firing pin body, and the two ends of the limiting anti-rotation pin also need to pass through the firing pin body sleeve and the limiting anti-rotation pin groove on the firing pin body, so as to achieve the purpose of connecting, stopping and limiting the ceiling nail gun; this limiting structure not only has the problems of complex design, many parts, high processing precision requirements, long manufacturing cycle and high cost, but also increases the weight of the product and the construction intensity of the operating workers, which ultimately makes it difficult to guarantee the construction quality. Summary of the invention

[0003] The object of the present invention is to provide a limiting mechanism for a ceiling nail shooter to solve the above-mentioned problem.

[0004] In order to achieve the purpose of the present invention, the technical solution adopted is: a limiting mechanism of a ceiling nail shooter, including a firing base and a connecting sleeve, the connecting sleeve is installed at the front end of the firing base, and a limiting retaining ring is installed on the inner wall of the connecting sleeve; the connected end of the firing base has a firing inner hole, and the inner diameter of the firing inner hole is larger than the inner diameter of the limiting retaining ring.

[0005] Furthermore, the inner wall of the connecting sleeve has a flange, and the limit retaining ring is pressed between the flange and the firing base.

[0006] Furthermore, a firing pin body sleeve is installed in the connecting sleeve, a firing pin body is installed in the firing pin body sleeve, and a radially extending anti-rotation pin is installed on the firing pin body; a sliding guide groove extending along the axial direction is provided on the firing pin body sleeve, and the anti-rotation pin passes through the sliding guide groove and extends outwardly into the firing inner hole.

[0007] Furthermore, a stop pin assembly hole is provided on the firing pin body; the stop pin is step-shaped, and the large diameter end of the stop pin is installed in the stop pin assembly hole.

[0008] Furthermore, the end of the large diameter end of the locking pin is spherical.

[0009] Furthermore, the bottom of the firing inner hole is funnel-shaped; a limiting hole is provided in the middle of the sliding guide groove; a firing sear assembly hole is also provided on the firing pin body, a firing sear is installed in the firing sear assembly hole, and a supporting spring is installed between the firing sear and the bottom of the firing sear assembly hole; the firing sear is step-shaped, the top of the firing sear is conical, and the top of the firing sear is clamped in the limiting hole.

[0010] Furthermore, the firing sear assembly hole is a stepped hole, and the firing sear assembly hole radially penetrates the firing pin body, and the firing sear and the support spring are both installed at the large diameter end of the firing sear assembly hole.

[0011] Furthermore, a mounting hole is provided at the bottom of the firing sear, and the upper end of the support spring is installed in the mounting hole.

[0012] Furthermore, a firing pin sleeve is installed at the front end of the firing pin body, and the firing pin sleeve is welded and fixed to the firing pin body.

[0013] Furthermore, a firing pin is installed at the front end of the firing pin body, and the firing end of the firing pin extends into the firing pin sleeve.

[0014] Furthermore, a mounting groove is provided at the front end of the firing pin body, and the firing pin is installed in the mounting groove; a clamping cover for clamping the firing pin needle cap is also provided at the front end of the firing pin body, and a through hole corresponding to the firing pin needle rod is also provided on the clamping cover.

[0015] The beneficial effects of the present invention are:

[0016] By installing a limit ring on the inner wall of the connecting sleeve, the limit ring can directly limit the stop pin during the forward movement of the firing pin body, thereby simplifying the structure of the ceiling nail shooter, reducing production costs and processing accuracy requirements, and improving production efficiency.

[0017] By setting the bottom of the firing inner hole into a funnel shape, the firing base can push the firing sear to automatically retract into the firing sear assembly hole as the firing base moves forward, making the driving of the firing sear more convenient.

[0018] By setting the anti-rotation pin as a stepped shaft and installing the large diameter end of the anti-rotation pin in the anti-rotation pin assembly hole, not only the firing pin body is limited, but also the firing pin body is effectively prevented from rotating in the firing pin body sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of a limiting mechanism of a ceiling nail shooter in the prior art;

[0020] Figure 2 It is a structural diagram of the limiting mechanism of the ceiling nail shooting device provided by the present invention;

[0021] Figure 3 yes Figure 1 Installation structure diagram of the firing pin body;

[0022] Figure 4 yes Figure 1 The structural diagram of the middle firing pin body sleeve;

[0023] Figure 5 yes Figure 1Structural diagram of the firing pin body.

[0024] Markings and corresponding parts names in the attached drawings:

[0025] 1. Firing base, 2. Connecting sleeve, 3. Limit retaining ring, 4. Firing inner hole, 5. Stop pin, 6. Firing pin body, 7. Firing pin body sleeve, 8. Bottom hole, 9. Firing pin sleeve limit hole, 10. Limit stop, 11. Sliding guide groove, 12. Rear positioning shaft, 13. Firing spring, 14. Front positioning shaft, 15. Flange, 16. Stop pin assembly hole, 17. Limit hole, 18. Firing sear assembly hole, 19. Firing sear, 20. Support spring, 21. Mounting hole, 22. Firing pin sleeve, 23. Firing pin, 24. Mounting groove, 25. Pressing cover, 26. Return spring seat, 27. Return spring, 28. Silencer, 29. Launch tube. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0027] Figures 2 to 5 The limiting mechanism of a ceiling nail gun provided by the present invention is shown, comprising a firing base 1 and a connecting sleeve 2, the connecting sleeve 2 is installed at the front end of the firing base 1, and a limiting retaining ring 3 is installed on the inner wall of the connecting sleeve 2; the connected end of the firing base 1 has a firing inner hole 4, and the inner diameter of the firing inner hole 4 is larger than the inner diameter of the limiting retaining ring 3.

[0028] The connecting sleeve 2 is sleeved on the firing base 1, and the connecting sleeve 2 and the firing base 1 are fixed by threaded connection, so that the installation and disassembly between the connecting sleeve 2 and the firing base 1 are more convenient; the limit retaining ring 3 is annular, the outer diameter of the limit retaining ring 3 matches the inner diameter of the connecting sleeve 2, and the limit retaining ring 3 is mainly used to limit the stop pin 5, thereby limiting the forward movement of the firing pin body 5 in the firing pin body sleeve 7.

[0029] The firing base 1 also has a bottom hole 8 and a firing pin sleeve limiting hole 9, and the apertures of the bottom hole 8, the firing pin sleeve limiting hole 9 and the firing inner hole 4 gradually increase, and a limiting stop 10 is formed between the bottom hole 8 and the firing pin sleeve limiting hole 9, so that when the firing pin body sleeve 7 retreats in the connecting sleeve 2, the limiting stop 10 can limit the firing pin body sleeve 7; by making the inner diameter of the firing inner hole 4 larger than the limiting retaining ring 3, the small diameter end of the stop pin 5 can extend into the firing inner hole 4 after passing through the sliding guide groove 11, and when the stop pin 5 moves forward with the firing pin body 6, when the stop pin 5 corresponds to the limiting retaining ring 3, the limiting retaining ring 3 can limit the stop pin 5, thereby limiting the firing pin body 6 from continuing to move forward in the firing pin body sleeve 7.

[0030] A rear positioning shaft 12 is fixedly installed in the bottom hole 8 of the firing base 1, and a firing spring 13 is sleeved on the rear positioning shaft 12; the rear end of the firing pin body 6 has a front positioning shaft 14, and the front end of the firing spring 13 is sleeved on the front positioning shaft 14; the diameter of the front positioning shaft 14 is smaller than the diameter of the firing pin body 6, so that the connection between the front positioning shaft 14 and the firing pin body 6 has a step surface, so that the front end of the firing spring 13 can be against the connection between the front positioning shaft 14 and the firing pin body 6.

[0031] The inner wall of the connecting sleeve 2 has a flange 15, and the limit retaining ring 3 is pressed between the flange 15 and the firing base 1; the flange 15 and the connecting sleeve 2 are in an integral structure, and the inner diameter of the flange 15 is smaller than the inner diameter of the limit retaining ring 3. The flange 15 can limit one side of the limit retaining ring 3. As the firing base 1 and the connecting sleeve 2 are tightened, the end face of the firing base 1 gradually presses the other side of the limit retaining ring 3, so that the limit retaining ring 3 is pressed between the firing base 1 and the flange 15, making the fixation of the limit retaining ring 3 more convenient.

[0032] A firing pin body sleeve 7 is installed in the connecting sleeve 2, a firing pin body 6 is installed in the firing pin body sleeve 7, and a radially extending anti-rotation pin 5 is installed on the firing pin body 6; a sliding guide groove 11 extending along the axial direction is opened on the firing pin body sleeve 7, and the anti-rotation pin 5 extends outward through the sliding guide groove 11 to the firing inner hole 4; the firing pin body sleeve 7 is clearance-matched with the connecting sleeve 2, and the rear end of the firing pin body sleeve 7 is inserted into the firing pin sleeve limiting hole 9 of the firing base 1, and the firing pin body sleeve 7 is clearance-matched with the firing pin sleeve limiting hole 9, so that the firing pin body sleeve 7 can move forward and backward in the firing base 1 and the connecting sleeve 2; the firing pin body 6 can move axially in the firing pin body sleeve 7, the central axis of the anti-rotation pin 5 is consistent with the diameter direction of the firing pin body 6, and the central axis of the sliding guide groove 11 is in the same vertical plane as the central axis of the anti-rotation pin 5, so that the anti-rotation pin 5 can be smoothly and accurately inserted in the sliding guide groove 11, so that when the firing pin body 6 moves in the firing pin body sleeve 7, the sliding guide groove 11 can not only limit the rotation of the firing pin body 6, but also effectively limit the movement of the firing pin body 6.

[0033] A stop pin assembly hole 16 is provided on the firing pin body 6; the stop pin 5 is step-shaped, and the large diameter end of the stop pin 5 is installed in the stop pin assembly hole 16; the central axis of the stop pin assembly hole 16 is consistent with the diameter direction of the firing pin body 6, and the stop pin assembly hole 16 passes through the firing pin body 6; the large diameter end of the stop pin 5 is clearance-matched with the stop pin assembly hole 15, so that the assembly of the stop pin 5 is more convenient; the small diameter end of the stop pin 5 passes through the sliding guide groove 11 and extends into the firing inner hole 4, and the diameter of the small diameter end of the stop pin 5 is matched with the width of the sliding guide groove 11, so that when the firing pin body 6 moves in the firing pin body sleeve 7, the small diameter end of the stop pin 5 can move along the sliding guide groove 11, which not only prevents the firing pin body 6 from rotating in the firing pin body sleeve 7, but also effectively guides the movement of the firing pin body 6.

[0034] The end of the large diameter end of the stop pin 5 is spherical, so that after the stop pin 5 is inserted into the firing pin body sleeve 7 along with the firing pin body 6, the large diameter end of the stop pin 5 is in point contact with the inner wall of the firing pin body sleeve 7, which effectively reduces the friction between the stop pin 5 and the inner wall of the firing pin body sleeve 7 and makes the movement of the firing pin body 6 in the firing pin body sleeve 7 smoother.

[0035] The bottom of the firing inner hole 4 is funnel-shaped; a limiting hole 17 is provided in the middle of the sliding guide groove 11; a firing sear assembly hole 18 is also provided on the firing pin body 6, a firing sear 19 is installed in the firing sear assembly hole 18, and a supporting spring 20 is installed between the firing sear 19 and the bottom of the firing sear assembly hole 18; the firing sear 19 is step-shaped, the top of the firing sear 19 is conical, and the top of the firing sear 19 is stuck in the limiting hole 17.

[0036] The diameter of the limiting hole 17 is greater than the width of the sliding guide groove 11, and the specific position of the limiting hole 17 is confirmed according to the amount that the firing pin body 6 needs to move in the firing pin body sleeve 7; the central axis of the firing sear assembly hole 18 is consistent with the diameter direction of the firing pin body 6, so that after the firing sear 19 is assembled in the firing sear assembly hole 18, the top of the firing sear 19 can be accurately positioned with the limiting hole 17; by installing a support spring 20 between the firing sear assembly hole 18 and the firing sear 19, not only can the upper end of the firing sear 19 be clamped in the limiting hole 17, so that the firing pin body 6 and the firing pin body sleeve 7 are locked; and when the firing pin body 6 and the firing pin body sleeve 7 do not need to be locked, a downward force can be applied to the firing sear 19, so that the firing sear 19 shrinks into the firing sear assembly hole 18, so that the firing pin body 6 and the firing pin body sleeve 7 lose the lock, and the firing pin body 6 can slide in the firing pin body sleeve 7.

[0037] The connection between the firing inner hole 4 and the firing pin sleeve limiting hole 17 is in a cone shape. By setting the top of the firing sear 19 into a cone shape, not only the friction between the firing sear 19 and the firing base 1 is reduced when the firing base 1 moves forward after the firing pin body 6 and the firing pin body sleeve 7 are locked, but also after the firing base 1 moves forward to a certain distance, the conical surface at the bottom of the firing inner hole 4 can push the firing sear 19 to shrink into the firing sear assembly hole 18, so that the locking of the firing pin body 6 and the firing pin body sleeve 7 is released, and the firing spring 13 can instantly release its own stored energy, so that the firing spring 13 can quickly push the firing pin body 6 forward.

[0038] The firing sear assembly hole 18 is a stepped hole, and the firing sear assembly hole 18 radially penetrates the firing pin body 6, and the firing sear 19 and the support spring 20 are both installed at the large diameter end of the firing sear assembly hole 18; the top of the firing sear 19 is away from the small diameter end of the firing sear assembly hole 18, ensuring that the firing sear 19 can move up and down smoothly in the firing sear assembly hole 18; the firing sear assembly hole 18 penetrates the firing pin body 6, effectively preventing the upward and downward movement of the firing sear 19 from being affected by the gas entering the firing sear assembly hole 18, making the upward and downward movement of the firing sear 19 smoother.

[0039] A mounting hole 21 is provided at the bottom of the firing sear 19, and the upper end of the support spring 20 is mounted in the mounting hole 21; the central axis of the mounting hole 21 is in the same straight line as the central axis of the firing sear 19, and by mounting the upper end of the support spring 20 in the mounting hole 21, the upper end of the support spring 20 can be limited by the firing sear 19, so that when the firing sear 19 moves downward, the firing sear 19 can evenly act on the support spring 20, so that the force on the support spring 20 is more balanced, and the support spring 20 is effectively prevented from being tilted and deformed due to long-term compression.

[0040] A firing pin sleeve 22 is also installed at the front end of the firing pin body 6, and the firing pin sleeve 22 is welded and fixed to the firing pin body 6; a firing pin 23 is also installed at the front end of the firing pin body 6, and the firing end of the firing pin 23 extends into the firing pin sleeve 22, and the firing pin 23 and the firing pin sleeve 22 are clearance-matched, so that the firing pin 23 can move forward or backward smoothly along the firing pin sleeve 22.

[0041] The front end of the firing pin body 6 is provided with a mounting groove 24, and the firing pin 23 is installed in the mounting groove 24; the front end of the firing pin body 6 is also covered with a clamping cover 25 for clamping the needle cap of the firing pin 23, and the clamping cover 25 is also provided with a through hole corresponding to the needle rod of the firing pin 23; the front end of the firing pin body 6 is step-shaped, and the mounting groove 24 is provided on the end face of the front end of the firing pin body 6, and the size and shape of the mounting groove 24 correspond to the size and shape of the needle cap of the firing pin 23, so that the needle cap of the firing pin 23 can be installed in the mounting groove 24; the outer diameter of the clamping cover 25 is equal to the major diameter of the firing pin body 6, and the inner wall of the clamping cover 25 is provided with an internal thread, and the front end of the firing pin body 6 is provided with an external thread, so that the clamping cover 25 can be fixed on the firing pin body 6 by threads, making the installation and disassembly of the firing pin 23 more convenient.

[0042] The front end of the firing pin body sleeve 7 is also sleeved with a return spring seat 26, the front end of the connecting sleeve 2 is sleeved on the return spring seat 26, and the firing pin body sleeve 7 is also sleeved with a return spring 27, one end of the return spring 27 is abutted on the flange 15 in the connecting sleeve 2, and the other end of the return spring 27 is abutted on the return spring seat 26; the front end of the firing pin body sleeve 7 also has an outwardly folded edge platform, and the end of the return spring seat 26 connected to the firing pin body sleeve 7 has a stopper that cooperates with the edge platform, which effectively prevents the return spring seat 26 from detaching from the firing pin body sleeve 7; the front end of the return spring seat 26 is also threadedly connected to a silencer 28, and a launch tube 29 is fixedly installed in the silencer 28, the central axis of the launch tube 29 is in the same straight line as the central axis of the firing pin sleeve 22, and the front end of the firing pin sleeve 22 extends into the launch tube 29.

[0043] When it is necessary to fix the building matrix, the integrated nail bullet is first placed into the launch tube 29, and the front end of the launch tube 29 is placed against the building matrix to be fixed. People apply a thrust to the firing base 1 in the direction of the building matrix, and the firing base 1 transmits the force to the connecting sleeve 2, and the connecting sleeve 2 transmits the force to the reset spring 27, so that the reset spring 27 is gradually compressed, so that the connecting sleeve 2 gradually moves toward the front end of the reset spring seat 26, so that the front end surface of the firing pin sleeve 22 is tightly pressed against the integrated nail bullet; when the reset spring 27 is fully compressed, the firing base 1 continues to be pushed, and the firing base 1 transmits the force to the firing spring 13, and the firing spring 13 is gradually compressed to store energy, so that the firing pin body sleeve 7 gradually enters the firing pin sleeve limiting hole 9 in the firing base 1, so that the firing sear 19 gradually approaches the bottom of the firing inner hole 4. As the firing spring 13 is gradually compressed, the inclined surface of the bottom of the firing inner hole 4 compresses the firing sear 19, causing the firing sear 19 to gradually move into the firing sear assembly hole 18. When the top of the firing sear 19 is flush with the outer wall of the firing pin body sleeve 7, the top of the firing sear 19 is conical, so that the locking between the firing sear 19 and the firing pin body sleeve 7 is lost. At this time, the firing spring 13 can quickly push the firing pin body 6 forward along the firing pin body sleeve 7 through the stored energy. While the firing pin body 6 moves forward, the firing pin 23 moves forward synchronously, so that the needle tip of the firing pin 23 quickly penetrates the firing pin sleeve 22 to fire the integrated nail bullet, causing the integrated nail bullet to explode, and the nails on the integrated nail bullet to be quickly shot into the building matrix.

[0044] When the firing pin body 6 moves forward along the firing pin body sleeve 7, the cooperation between the stop pin 5 and the limit ring 3 can effectively prevent the firing pin body 6 from moving forward excessively.

[0045] When the integrated nail bullet is fired, people cancel the thrust applied to the firing pin base 1. At this time, the reset spring 27 pushes the connecting sleeve 2 to reset through its own thrust. While the connecting sleeve 2 is reset, the limit ring 3 pushes the stop pin 5 to reset along the sliding guide groove 11, thereby resetting the firing pin body 6 and the firing sear 19 on the firing pin body 6. When the firing sear 19 moves to the position corresponding to the limiting hole 17, the support spring 20 pushes the firing sear 19 upward through its own elastic force, so that the top of the firing sear 19 is re-stuck in the limiting hole 17.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A limiting mechanism for a ceiling nail gun, characterized in that: The invention comprises a firing base (1) and a connecting sleeve (2), wherein the connecting sleeve (2) is mounted at the front end of the firing base (1), and a limit retaining ring (3) is mounted on the inner wall of the connecting sleeve (2); the connected end of the firing base (1) has a firing inner hole (4), and the inner diameter of the firing inner hole (4) is larger than the inner diameter of the limit retaining ring (3); a firing pin body sleeve (7) is mounted in the connecting sleeve (2), the firing pin body sleeve (7) and the connecting sleeve (2) are clearance-matched, a firing pin body (6) is mounted in the firing pin body sleeve (7), and a radially extending stop pin (5) is mounted on the firing pin body (6), and the firing pin body (6) can be axially moved in the firing pin body sleeve (7). The firing pin (6) is movable, and the central axis of the stop pin (5) is consistent with the diameter direction of the firing pin body (6); the firing pin body sleeve (7) is provided with a sliding guide groove (11) extending in the axial direction, the central axis of the sliding guide groove (11) and the central axis of the stop pin (5) are on the same vertical plane, and the stop pin (5) passes through the sliding guide groove (11) and extends outward to the firing inner hole (4); the firing pin body (6) is provided with a stop pin assembly hole (16); the stop pin (5) is in a step shape, and the large diameter end of the stop pin (5) is installed in the stop pin assembly hole (16); the bottom of the firing inner hole (4) is funnel-shaped.

2. The limiting mechanism of the ceiling nail gun according to claim 1, characterized in that: The inner wall of the connecting sleeve (2) has a flange (15), and the limit retaining ring (3) is pressed tightly between the flange (15) and the firing base (1).

3. The limiting mechanism of the ceiling nail gun according to claim 1, characterized in that: A limiting hole (17) is provided in the middle of the sliding guide groove (11); a firing sear assembly hole (18) is also provided on the firing pin body (6), a firing sear (19) is installed in the firing sear assembly hole (18), and a supporting spring (20) is installed between the firing sear (19) and the bottom of the firing sear assembly hole (18); the firing sear (19) is in a step shape, the top of the firing sear (19) is in a conical shape, and the top of the firing sear (19) is clamped in the limiting hole (17).

4. The limiting mechanism of the ceiling nailer according to claim 3, characterized in that: The firing sear assembly hole (18) is a stepped hole, and the firing sear assembly hole (18) radially penetrates the firing pin body (6), and the firing sear (19) and the support spring (20) are both mounted at the large diameter end of the firing sear assembly hole (18).

5. The limiting mechanism of the ceiling nail gun according to claim 3, characterized in that: The bottom of the firing sear (19) is provided with a mounting hole (21), and the upper end of the support spring (20) is mounted in the mounting hole (21).

6. The limiting mechanism of the ceiling nail gun according to claim 1, characterized in that: A firing pin sleeve (22) is also mounted on the front end of the firing pin body (6), and the firing pin sleeve (22) is fixed to the firing pin body (6) by welding.

7. The limiting mechanism of the ceiling nailer according to claim 6, characterized in that: A firing pin (23) is also mounted on the front end of the firing pin body (6), and the firing end of the firing pin (23) extends into the firing pin sleeve (22).

8. The limiting mechanism of the ceiling nail gun according to claim 7, characterized in that: The front end of the firing pin body (6) is provided with a mounting groove (24), and the firing pin (23) is mounted in the mounting groove (24); the front end of the firing pin body (6) is also covered with a clamping cover (25) for clamping the needle cap of the firing pin (23), and the clamping cover (25) is also provided with a through hole corresponding to the needle rod of the firing pin (23).

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