CN221314089U - Split firing device of firing pin hammer - Google Patents

Abstract

The utility model discloses a split firing device of a firing pin hammer, which comprises a firing pin seat, a hammer, a firing pin sleeve and an elastic resetting piece, wherein the hammer is arranged in the firing pin seat; the two ends of the firing pin are respectively movably arranged in the firing pin sleeve and the firing pin seat, the firing pin is provided with a limiting boss, and the limiting boss is positioned in the limiting sleeve; the elastic resetting piece is positioned in the limiting sleeve, and two ends of the elastic resetting piece are respectively abutted against the limiting boss and the striking pin sleeve. The key improvement point of the utility model is that the split type structure of the firing pin and the hammer is adopted, so that the movement speed of the firing pin and the hammer can be improved, the impact force of the hammer on the firing pin can be improved, and the aims of accurately firing the nail shooting bullet and improving the construction efficiency are fulfilled.

Description

Split firing device of firing pin hammer

Technical Field

The utility model relates to the technical field of nail shooting devices, in particular to a split firing device of a firing pin hammer.

Background

The suspended ceiling nail shooter is a special tool in the nail shooting fastening technology, and can push the nail shooting in the nail pipe to move forward by taking high-pressure gas generated by detonating a nail shooting bullet as power, and the nail shooting device is nailed into a fastened object and a substrate, so that the object fastening purpose is finally achieved. The ceiling nail shooter does not need to ascend a height in the operation process, so that the ceiling operation is easy and free, the probability of work injury is reduced, the operation can be performed without a narrow space of a power supply, the electric drill drilling construction is not needed, dust pollution is avoided, and the operation is simple, so that the ceiling nail shooter is more and more widely used.

The existing nail shooter generally comprises a firing pin, a hammer and other nail shooting bullet firing structures, and as disclosed in patent document with publication number of CN216152268U, a ceiling nail shooter firing mechanism comprises a firing pin body (hammer) and a firing pin which are connected with each other, wherein the firing pin is fixedly connected with the firing pin body into a whole through a connecting pin. While such an integrated firing mechanism is also capable of firing a staple cartridge, the overall mass of the firing pin hammer is relatively heavy due to its connection together, while the energy released by the spring pushing the firing mechanism is constant (bulk MV ² = constant), which results in a lower overall firing mechanism movement than either the firing pin or the hammer alone. Correspondingly, the low firing speed of the firing pin easily causes that the nail shooting bullet cannot be effectively fired, thereby generating a dummy bullet, not only influencing the firing success rate of the nail shooting bullet, but also influencing the construction efficiency.

Disclosure of utility model

The utility model aims to overcome the technical problems in the prior art and provides a split firing device of a firing pin and a hammer.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

A firing pin hammer split firing device is characterized in that: the hammer is arranged in the hammer seat, a limit sleeve is integrally formed at the rear end of the hammer needle sleeve, the inner diameter of the limit sleeve is larger than that of the hammer needle sleeve, and the limit sleeve is fixed at the front end of the hammer seat and communicated with the hammer seat; the two ends of the firing pin are respectively movably arranged in the firing pin sleeve and the firing pin seat, the firing pin is provided with a limiting boss, and the limiting boss is positioned in the limiting sleeve; the elastic resetting piece is positioned in the limiting sleeve, and two ends of the elastic resetting piece are respectively abutted against the limiting boss and the striking pin sleeve.

And the limiting sleeve is provided with a slag discharging hole.

The slag discharging holes are waist-shaped holes symmetrically formed in two sides of the front section of the limiting sleeve.

The front end of the beating needle seat is provided with a threaded hole, the beating needle seat is fixed with a connecting sleeve through the threaded hole, and the limiting sleeve is detachably fixed on the beating needle seat through the connecting sleeve.

The connecting sleeve comprises an integrally formed cover plate and a connecting cylinder, the connecting cylinder is fixed in the threaded hole in a threaded mode, the cover plate is abutted to the end face of the threaded hole, and a limiting hole is formed in the middle of the cover plate; the middle part of stop collar is equipped with the spacing platform that the external diameter is greater than spacing hole internal diameter, and the one end of stop collar passes through spacing platform and spacing hole to be fixed in the connecting cylinder, and the other end is located outside the connecting cylinder.

The bottom of the threaded hole is provided with a through hole communicated with the striking seat, the inner diameter of the through hole is smaller than the outer diameter of the limiting boss, and the rear end of the striking needle enters the striking seat through the through hole.

The needle cover includes main part section and extension, and the internal diameter of extension is less than the internal diameter of main part section, the needle includes integrated into one piece's needle point section, gas-tight section, toper changeover portion and needle bar section in proper order from front to back, and the external diameter of needle point section is less than the external diameter of gas-tight section, and the external diameter of gas-tight section and the internal diameter looks adaptation of extension, the external diameter of needle bar section and the internal diameter looks adaptation of main part section, and the needle point section is located the extension, and the both ends of gas-tight section are located extension and main part section respectively.

The gas-tight section is of a cylindrical structure, and the front end face of the gas-tight section is perpendicular to the outer surface.

The utility model has the advantages that:

1. The key improvement point of the firing device is that the firing pin and the hammer with the split type structure are adopted, and compared with the existing integrated structure, the split type firing device can further improve the movement speed of the hammer under the condition that the original driving force is unchanged. Accordingly, the impact force of the hammer on the firing pin can be improved, and the speed and the force of the firing pin impacting the nail shooting bullet are improved, so that the accurate firing of the nail shooting bullet is facilitated, the generation of dumb bullets is reduced, and the construction efficiency is improved. In addition, under the effect of the elastic reset piece, the front end of the firing pin can not extend out of the front end face of the firing pin sleeve in a normal state, and the rear end of the firing pin can be automatically reset into the firing pin seat, so that the distance between the firing pin and the hammer and the distance between the firing pin and the nail shooting bullet are kept constant, and the continuous and reliable firing of the nail shooting bullet can be ensured.

2. The utility model can effectively remove the residues of the shooting nails through the residue discharge holes, and is beneficial to preventing the firing pins from being blocked in the firing pin sleeve.

3. The waist-shaped holes on two sides of the front section of the limiting piece are symmetrically formed, so that the residue removing effect of the device is improved.

4. According to the utility model, the limit sleeve is detachably fixed through the connecting sleeve, so that the device is simpler and more convenient to detach and install.

5. The utility model divides the firing pin sleeve into the main body section and the extension section, and sequentially divides the firing pin into the needle point section, the air-tight section, the conical transition section and the needle rod section, and the sealing length of the device is increased by the mutual matching of the sections of the firing pin sleeve and the sections of the firing pin, thereby being beneficial to improving the shooting power of the shooting nail.

6. The front end face of the air-closing section is perpendicular to the outer surface, which is equivalent to the front end of the air-closing section of the firing pin being in a sharp angle structure, which is not only beneficial to cleaning residues, but also prevents the residues from entering the rear end to cause blockage.

Drawings

FIG. 1 is a schematic plan view of the present utility model;

FIG. 2 is a schematic perspective view of the present utility model;

FIG. 3 is a schematic plan view of a striking pin cover according to the present utility model;

FIG. 4 is a schematic perspective view of a striking pin cover according to the present utility model;

FIG. 5 is a schematic perspective view of a striker according to the present utility model;

FIG. 6 is a schematic cross-sectional view of the present utility model assembled to a ceiling nailer.

The drawing is marked as follows: 1. the safety device comprises a firing pin, 2, a firing pin seat, 3, a firing pin sleeve, 4, a hammer, 5, an elastic resetting piece, 6, a limiting sleeve, 7, a limiting boss, 8, a slag discharging hole, 9, a threaded hole, 10, a connecting sleeve, 11, a cover plate, 12, a connecting cylinder, 13, a main body section, 14, an extension section, 15, a needle point section, 16, an air-closing section, 17, a conical transition section, 18, a needle bar section, 19, a safety spring, 20 and a safety pin.

Detailed Description

Example 1

As shown in fig. 1-5, a split firing device of a firing pin and a hammer is suitable for an axial suspended ceiling nailing device, and comprises a firing pin seat 2, a hammer 4, a firing pin 1, a firing pin sleeve 3 and an elastic reset piece 5, wherein the firing pin 1 and the hammer 4 are two independent structural members, the hammer 4 is arranged in the firing pin seat 2 through a safety spring 19 and a safety pin 20, the safety spring 19 and the safety pin 20 play a limiting role on the hammer 4, and the hammer 4 can strike the firing pin 1 under the action of the firing spring in the suspended ceiling nailing device after the limiting is released. The rear end (right end in the direction of the drawing) of the firing pin sleeve 3 is integrally formed with a limiting sleeve 6 communicated with the firing pin sleeve 3, the inner diameter of the limiting sleeve 6 is larger than that of the firing pin sleeve 3, the outer diameter of the limiting sleeve 6 is also larger than that of the firing pin sleeve 3, and the limiting sleeve 6 is fixed at the front end of the firing pin seat 2 and communicated with the firing pin seat 2. The two ends (front end and rear end) of the firing pin 1 are respectively movably arranged in the firing pin sleeve 3 and the firing pin seat 2, and the rear end of the firing pin 1 is opposite to the hammer 4 and is impacted by the hammer 4. In addition, the striker 1 is also provided with an annular limiting boss 7, and the limiting boss 7 is positioned in the limiting sleeve 6 and can play a limiting role on the striker 1. The elastic reset piece 5 is sleeved on the firing pin 1 and is positioned in the limiting sleeve 6, the elastic reset piece 5 can be a spring, two ends of the elastic reset piece are respectively abutted against the limiting boss 7 and the firing pin sleeve 3, under the cooperation of the elastic reset piece 5 and the limiting boss 7, the front end of the firing pin 1 can not extend out of the front end face of the firing pin sleeve 3 in a normal state, and the rear end of the firing pin 1 always extends into the inner cavity of the firing pin seat 2 and corresponds to the hammer 4, so that the hammer 4 can be conveniently and accurately impacted.

It should be noted that, in order to avoid the impact force of the striking pin 1 on the nail shooting bullet caused by the excessive elastic force of the elastic restoring member 5, a spring with smaller elastic force is required to be used as the elastic restoring member 5 in practical application, and it is preferable that the limit boss 7 just abuts against the striking pin seat 2 under the action of the spring.

Fig. 6 shows a schematic structural diagram of the present embodiment assembled on an existing ceiling nailer, and the implementation principle is as follows:

Firstly, an integrated nail bullet is arranged in a nail tube of a ceiling nail shooting device, the nail tube is aligned to a part to be installed, then an operator applies a certain acting force to the ceiling nail shooting device through a handle, the nail tube is stressed and compressed backwards, the integrated nail bullet compresses a needle striking sleeve 3 and a needle striking seat 2 (simultaneously a firing spring is compressed), when a safety pin 20 on a hammer 4 moves to a position of an inclined plane in a body, the safety pin 20 arranged in the hammer 4 is pressed in by the inclined plane, the safety is relieved, at the moment, the energy released by the firing spring pushes the hammer 4 to rapidly impact a needle 1 forwards, and the needle 1 is impacted into the integrated nail bullet at a high speed. After the integral nail bullet is exploded, high-pressure gas is generated to push the nail to shoot into the matrix, and simultaneously, the high-pressure gas pushes the striking needle sleeve 3, the striking needle seat 2 and the hammer 4 to retreat.

Wherein, when shooting, the higher the speed that the firing pin 1 bumps into the integrated nail bullet, the higher the friction heating between the firing pin 1 and the percussion medicine, the easier the firing to detonate the propellant powder. The higher the striking pin 1 strike speed, the higher the firing rate of the integrated cartridge, and the fewer the dummy cartridges.

Since the energy released after the firing spring is compressed is constant, the kinetic energy transmitted to the hammer 4 by the kinetic energy, MV ² =constant, and the kinetic energy transmitted to the firing pin 1 by the hammer 4, M ₁V₁ ² =constant, the velocity V ₁ of the firing pin 1 > the velocity V of the hammer 4, because M > M ₁. Based on this, this scheme adopts split type firing pin 1, 4 structures of hammer, has improved the motion speed of 4 and firing pin 1 of hammer effectively, and then has improved the firing rate of penetrating the nail bullet.

Example 2

As shown in fig. 1 to 4, in the present embodiment, on the basis of embodiment 1, slag discharging holes 8 are formed in the stop collar 6, and along the axial direction of the stop collar 6, the slag discharging holes 8 are preferably kidney-shaped holes symmetrically formed on both sides of the front section of the stop collar 6. The residue of the nail shooting bullet generated in the actual use process is discharged through the residue discharging hole 8 after entering the limit sleeve 6, so that the residue is prevented from being blocked by movable structural parts such as the firing pin 1, and better stability and persistence of the nail shooter are ensured.

Example 3

As shown in fig. 1-2, in the present embodiment, on the basis of embodiment 1 or embodiment 2, a threaded hole 9 is formed at the front end of the striking seat 2, the striking seat 2 is fixed with a connecting sleeve 10 through the threaded hole 9, and the limit sleeve 6 is detachably fixed on the striking seat 2 through the connecting sleeve 10. In addition, a through hole communicated with the striker base 2 is formed in the bottom of the threaded hole 9, the inner diameter of the through hole is smaller than the outer diameter of the limiting boss 7, and the rear end of the striker 1 enters the striker base 2 through the through hole. The limit sleeve 6 is detachably fixed on the striker seat 2 through the connecting sleeve 10, so that the disassembly and assembly are convenient.

As shown in fig. 1-2, in this embodiment, the connecting sleeve 10 includes an integrally formed cover plate 11 and a connecting barrel 12, the outer diameter of the cover plate 11 is slightly larger than the outer diameter of the striker base 2, the connecting barrel 12 is screwed in the threaded hole 9, the cover plate 11 abuts against the end surface of the threaded hole 9, and a limiting hole is formed in the middle of the cover plate 11. The middle part of stop collar 6 is equipped with the spacing platform that the external diameter is greater than spacing hole internal diameter, and the one end of stop collar 6 passes through spacing platform and spacing hole to be fixed in connecting cylinder 12, and the other end is located outside the connecting cylinder 12. In practical application, the tightening, fixing, loosening and disassembling of the limit sleeve 6 can be realized through the forward rotation or reverse rotation of the connecting sleeve 10, and the operation is simple and convenient.

Example 4

On the basis of any one of the embodiments 1 to 3, the structures of the needle cover 3 and the needle 1 are further defined in this embodiment, respectively. As shown in fig. 1 to 5, the firing pin sleeve 3 includes a main body section 13 and an extension section 14, the length of the extension section 14 is 3 to 12mm, and the inner diameter of the extension section 14 is smaller than the inner diameter of the main body section 13. The firing pin 1 sequentially comprises a needle point section 15, an air closing section 16, a conical transition section 17 and a needle rod section 18 which are integrally formed from front to back, wherein the needle point section 15 is of a conical structure, and the outer diameter of the needle point section is smaller than that of the air closing section 16; the length of the air-closing section 16 is 12-25mm, the outer diameter of the air-closing section 16 is slightly smaller than the inner diameter of the extension section 14, the outer diameter of the needle rod section 18 is slightly smaller than the inner diameter of the main body section 13, the outer diameter of the air-closing section 16 is matched with the inner diameter of the extension section 14, the outer diameter of the needle rod section 18 is matched with the inner diameter of the main body section 13, the needle tip section 15 is positioned in the extension section 14, and the two ends of the air-closing section 16 are respectively positioned in the extension section 14 and the main body section 13. By the cooperation of the extension section 14 and the air-closing section 16 of the firing pin 1, the backward discharge of air from the aperture during firing can be reduced, thereby improving the explosion power and the explosion stability of the nail shooting bullet.

As shown in fig. 5, in the present embodiment, the air-closing section 16 has a cylindrical structure, and the front end face of the air-closing section 16 is perpendicular to the outer surface. The structure makes the front end of the air-closing section 16 be a sharp angle structure, and the outer diameter of the air-closing section 16 is only slightly smaller than the inner diameter of the extension section 14, so that after the nail shooting bullet is shot, the sharp angle structure can push the residues at the front end out of the needle-shooting sleeve 3, thereby avoiding blockage.

While the utility model has been described with reference to certain embodiments, it is understood that any feature disclosed in this specification may be replaced by alternative features serving the equivalent or similar purpose, unless expressly stated otherwise; all of the features disclosed, or all of the steps in a method or process, except for mutually exclusive features and/or steps, may be combined in any manner.

Claims (8)

1. A firing pin hammer split firing device is characterized in that: the hammer comprises a hammer seat (2), a hammer (4), a hammer needle (1), a hammer needle sleeve (3) and an elastic reset piece (5), wherein the hammer needle (4) is arranged in the hammer needle seat (2), a limit sleeve (6) is integrally formed at the rear end of the hammer needle sleeve (3), the inner diameter of the limit sleeve (6) is larger than that of the hammer needle sleeve (3), and the limit sleeve (6) is fixed at the front end of the hammer needle seat (2) and communicated with the hammer needle seat (2); the two ends of the firing pin (1) are respectively and movably arranged in the firing pin sleeve (3) and the firing pin seat (2), the firing pin (1) is provided with a limiting boss (7), and the limiting boss (7) is positioned in the limiting sleeve (6); the elastic resetting piece (5) is positioned in the limiting sleeve (6), and two ends of the elastic resetting piece (5) are respectively abutted against the limiting boss (7) and the striking pin sleeve (3).

2. A firing pin hammer split firing device as defined in claim 1, wherein: the limiting sleeve (6) is provided with a slag discharging hole (8).

3. A firing pin hammer split firing device as claimed in claim 2, wherein: the slag discharging holes (8) are waist-shaped holes symmetrically formed on two sides of the front section of the limiting sleeve (6).

4. A striker hammer split firing device according to any one of claims 1-3, wherein: the front end of the beating needle seat (2) is provided with a threaded hole (9), the beating needle seat (2) is fixed with a connecting sleeve (10) through the threaded hole (9), and the limiting sleeve (6) is detachably fixed on the beating needle seat (2) through the connecting sleeve (10).

5. A firing pin hammer split firing device as defined in claim 4, wherein: the connecting sleeve (10) comprises a cover plate (11) and a connecting cylinder (12) which are integrally formed, the connecting cylinder (12) is fixed in the threaded hole (9) in a threaded mode, the cover plate (11) is abutted to the end face of the threaded hole (9), and a limiting hole is formed in the middle of the cover plate (11); the middle part of stop collar (6) is equipped with the spacing platform that the external diameter is greater than spacing hole internal diameter, and the one end of stop collar (6) is fixed in connecting cylinder (12) through spacing platform and spacing hole, and the other end is located connecting cylinder (12) outward.

6. A firing pin hammer split firing device as defined in claim 4, wherein: the bottom of the threaded hole (9) is provided with a through hole communicated with the beating needle seat (2), the inner diameter of the through hole is smaller than the outer diameter of the limiting boss (7), and the rear end of the beating needle (1) enters the beating needle seat (2) through the through hole.

7. A firing pin hammer split firing device according to any one of claims 1-3, 5-6, wherein: the utility model provides a needle cover (3) includes main part section (13) and extension section (14), and the internal diameter of extension section (14) is less than the internal diameter of main part section (13), needle (1) are from front to back including integrated into one piece's needle point section (15), closed air section (16), toper changeover portion (17) and needle pole section (18) in proper order, and the external diameter of needle point section (15) is less than the external diameter of closed air section (16), and the external diameter of closed air section (16) suits with the internal diameter of extension section (14), and the external diameter of needle pole section (18) suits with the internal diameter of main part section (13), and needle point section (15) are located extension section (14), and the both ends of closed air section (16) are located extension section (14) and main part section (13) respectively.

8. A firing pin hammer split firing device as claimed in claim 7, wherein: the air-closing section (16) is of a cylindrical structure, and the front end face of the air-closing section (16) is perpendicular to the outer surface.