Axial nail shooting device with pressing type main sleeve

Abstract

The utility model relates to an axial nail shooter with a pressed main sleeve, which comprises the main sleeve, a driving hammer, a driving hammer sleeve and a nail tube, the main sleeve comprises a front main sleeve and a rear main sleeve, and the axial nail shooter is characterized in that an inner bulge is arranged on the inner wall of the rear main sleeve, a reducing pipe is arranged at the rear end of the rear main sleeve, and an inner transition surface between the rear main sleeve and the reducing pipe is a percussion inclined surface or a percussion cambered surface. The utility model has the beneficial effects that the pressed inner bulge plays a role in supporting and guiding the driving hammer sleeve, and the original time-consuming and tedious internal cutting procedure is replaced by a simple and quick pressing procedure. The maintenance period of the whole machine can be prolonged through the slag containing space and the chip containing space; the positioning problem does not need to be considered during assembly; and the situation that the brake pin is mistakenly installed in the corresponding reset outer groove in the prior art is avoided.

Description

Technical Field

[0001] This utility model discloses an axial nail gun. Background Technology

[0002] The axial nail gun technology currently in use is mature and has a wide range of applications.

[0003] The main working principle of an axial nail gun is to rely on the rapid forward movement of the firing pin to strike the bottom of the nail cartridge, causing the gunpowder inside the cartridge to explode. The high-pressure gas generated by the explosion exerts a huge thrust on the nail at the front end, driving the nail into the base and thus achieving the working task.

[0004] The main sleeve is a key component of the axial nail gun, and it is divided into a front main sleeve and a rear main sleeve. The front main sleeve contains a movable sleeve, and the rear main sleeve contains a hammer sleeve. Since the outer diameter of the movable sleeve is larger than the outer diameter of the hammer sleeve, the inner diameter of the front main sleeve is larger than the inner diameter of the rear main sleeve.

[0005] During the manufacturing process of the main sleeve, the selected pipe material has an inner diameter that meets the smaller inner diameter requirement of the rear main sleeve. Then, the inner diameter of the front main sleeve is machined. Sometimes, to ensure concentricity of the inner diameter, the inner diameter of the rear main sleeve is also machined simultaneously. Such machining processes and procedures increase production costs.

[0006] The current product requires a separate firing ramp to be machined on the inner wall of the rear main sleeve in order to press the brake pin and thus complete the firing action.

[0007] Furthermore, in the current product, to achieve the braking and reset functions, the hammer sleeve has a braking inner groove and a reset inner groove, respectively. Correspondingly, the rear main sleeve also has a firing groove and a reset outer groove. The braking inner groove and the reset inner groove are distributed at 90° angles circumferentially, as are the firing groove and the reset outer groove. The disadvantages of this arrangement are: 1. The machining amount for the through grooves is relatively large. 2. The machining precision requirements for through grooves evenly distributed at 90° angles circumferentially are high. 3. Misassembly is prone to occur during assembly; in actual assembly, the brake pin is frequently misaligned into the reset outer groove. Summary of the Invention

[0008] The purpose of this invention is to provide an axial nail gun with a press-type main sleeve to overcome the shortcomings of existing technology.

[0009] The technical solution adopted by this utility model to achieve its purpose is:

[0010] An axial nail gun with a pressing type main sleeve includes a main sleeve, a hammer, a hammer sleeve, and a nail tube. The main sleeve includes a front main sleeve and a rear main sleeve. The rear main sleeve is characterized by having an inner protrusion on its inner wall, a reduced diameter tube at the rear end of the rear main sleeve, and an inner transition surface between the rear main sleeve and the reduced diameter tube being a firing ramp or a firing arc surface.

[0011] The inner protrusion and the inner wall of the reduced-diameter tube can support the hammer sleeve.

[0012] The top surface of the inner protrusion is a concave arc surface.

[0013] The hammer sleeve has a reset inner groove, the rear main sleeve has a reset outer groove, and the reset pin on the hammer is located in the reset inner groove and the reset outer groove; the brake pin on the hammer is located in the reset inner groove.

[0014] The brake pin is located after the reset pin.

[0015] The convex ring of the nail tube is provided with an annular groove a. 。

[0016] It also includes a movable sleeve, on the outer wall of which is provided an annular groove b.

[0017] The beneficial effects of this invention are as follows: By pressing the outer wall of the main sleeve, multiple inner protrusions are formed on the inner wall of the main sleeve using the ductility of metal. The concave arc surfaces of the top surfaces of these inner protrusions work together to support and guide the hammer sleeve. This allows for the direct selection of tubing with an inner wall size matching the outer diameter of the movable sleeve, followed by pressing the inner protrusions onto the rear main sleeve. This replaces the original time-consuming and cumbersome internal cutting process with a simple and quick pressing process. Simultaneously, the reduced-diameter tube and the inner protrusions support the hammer sleeve, ensuring stability during operation and naturally creating a slag-holding space between the hammer sleeve and the rear main sleeve. Furthermore, the reduced-diameter tube's naturally formed slag-holding space also reduces the likelihood of adhesion between the protective sleeve and the rear main sleeve, extending the overall maintenance cycle. Additionally, the firing arc surface functions to press down the brake pin, release the hammer, and complete the firing process. Moreover, the 360-degree firing arc surface eliminates the need to consider positioning issues during assembly. The original hammer had its brake pin located in the inner brake groove and the reset pin in the reset groove. This required machining separate reset grooves and brake grooves on the hammer sleeve, increasing the number of steps and costs. This new invention combines the reset groove and brake groove into a single reset-brake groove, accommodating both the reset pin and brake pin without affecting performance. It also avoids the common problem of mistakenly installing the brake pin into the outer reset groove.

[0018] The present invention will be further described below through embodiments and in conjunction with the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of the embodiment of this utility model in its natural state.

[0020] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure.

[0021] Figure 3 yes Figure 2 A schematic diagram of the three-dimensional structure of the disassembled components.

[0022] Figure 4 This is a structural diagram of the main unit.

[0023] Figure 5 This is a cross-sectional view of the protrusion inside the rear main sleeve.

[0024] Figure 6 This is a schematic diagram of the nail tube structure.

[0025] Figure 7 This is a schematic diagram of the movable sleeve.

[0026] Figure 8 It is a diagram of the compression state when the entire machine is fired.

[0027] Figure 9 This is a diagram showing the state of the machine after firing and before it is reset.

[0028] Figure 10 This is a structural diagram of a similar product from the past.

[0029] Figure 11 This is a schematic diagram of the hammer sleeve structure of a previous product.

[0030] Figure 12 This is a schematic diagram of the main structure of a previous product.

[0031] Figure 13 yes Figure 12 End view. Detailed Implementation

[0032] In the diagram: 1 is the main sleeve, 2 is the movable sleeve, 3 is the hammer, 4 is the hammer sleeve, 5 is the nail tube, 6 is the front main sleeve, 7 is the rear main sleeve, 8 is the inner protrusion, 9 is the reduced diameter tube, 10 is the firing arc surface, 11 is the inner concave arc surface, 12 is the return inner groove, 13 is the return outer groove, 14 is the brake pin, 15 is the return pin, 16 is the convex ring, 17 is the ring groove A, 18 is the ring groove B, 19 is the recess, 20 is the brake hole, 21 is the return spring, 22 is the handle, 23 is the top spring, 24 is the firing spring, 25 is the firing pin, 26 is the nail cartridge, 27 is the chip collection space, 28 is the chip collection space, and 29 is the protective sleeve.

[0033] Example:

[0034] The applicant has been committed to the research and development of axial nail guns. The existing technologies closely related to this embodiment are: 201520748109.3, 201620525943.0, 201620525984.X, 201610383296.9, 201610383308.8, and 201610978775.5, which clearly describe the principle, structure, operation, and components of the axial nail gun. This application only describes the parts related to the improvement.

[0035] To accurately express the protection range and action description, in this utility model, the direction of the nail tube 5 is defined as the front.

[0036] In its natural state, such as Figure 2 As shown, the brake pin 14 on the hammer 3 is located in the brake hole 20 at the rear of a reset inner groove 12 on the hammer sleeve 4, corresponding to the direction of the reset outer groove 13. Simultaneously, the reset pin 15 on the hammer 3 passes through both the reset inner groove 12 and the reset outer groove 13. Under the action of the reset spring 21, the reset pin 15 abuts against the front end of the reset outer groove 13, and both ends of the reset pin 15 are constrained by the protective sleeve 29, so it will not fall off.

[0037] The front end of the hammer sleeve 4 is located inside the movable sleeve 2, and the rear end is located inside the rear main sleeve 7, and is supported by the concave arc surface 11 of the inner protrusion 8.

[0038] Firing process as follows Figure 2 , Figure 8 , Figure 9 As shown, when the external force presses on the handle 22, and the movable sleeve 2 and hammer sleeve 4 are considered to be relatively stationary, the reducing tube 9 and the main sleeve 1 move forward against the elastic force of the return spring 21 until the firing arc surface 10 exerts downward pressure on the brake pin 14 (at the same time, the firing spring 24 is compressed and stored energy; at this time, the rear end of the hammer sleeve 4 extends into the reducing tube 9 and is supported by the reducing tube 9 to maintain the movement stability of the hammer sleeve 4). The brake pin 14 moves downward against the elastic force of the top spring 23, thereby releasing the constraint of the brake hole 20 on the brake pin 14 and the hammer 3, and the hammer 3 can be released. Under the action of the firing spring 24, the hammer 3 moves forward rapidly (at the same time, the return pin 15 and the brake pin 14 also move forward synchronously), and the firing pin 25 at the front end of the hammer 3 can strike the bottom of the nail cartridge 26, completing the nail firing action.

[0039] For details on the locking and releasing structure and process of the brake hole 20 and brake pin 14, please refer to the utility model patent 2016212024389 previously granted by the inventor, which contains a detailed description.

[0040] The reset process after firing, such as Figure 9 , Figure 2As shown, after the pressure behind the handle 22 is released, the movable sleeve 2 and the hammer sleeve 4 are considered to be relatively stationary. The return spring 21 acts on the main sleeve 1, causing it to move backward. The return groove 13 on the main sleeve 1 pulls the return pin 15 inside it backward, and the return pin 15 drives the hammer 3 and the brake pin 14 to move backward synchronously until the brake pin 14 is once again located in the brake hole 20 and pops out under the action of the top spring 23 to achieve restraint. The whole machine returns to its original position. Figure 2 The natural state shown.

[0041] The concave arc surface 11 on the inner protrusion 8 can form a larger contact area with the hammer sleeve 4, thereby enhancing its motion stability.

[0042] In the co-groove structure of the brake pin 14 and the reset pin 15 described in this utility model, the brake pin 14 can only be located behind the reset pin 15. This positional relationship allows the firing arc surface 10 behind the main sleeve 1 to contact the brake pin 14 and press down, thereby completing the working setting requirements of the whole machine.

[0043] The convex ring 16 on the nail tube 5 is provided with a ring groove A17, the purpose of which is to reduce pressure and noise.

[0044] The outer wall of the movable sleeve 2 is provided with an annular groove B18 for scraping slag.

[0045] It is worth noting that the depression 19 is formed naturally during the pressing process and has no functional purpose.

[0046] Since the inner protrusion 8 is formed by pressing inward and supports the hammer sleeve 4, the dimensional difference between the outer wall of the hammer sleeve 4 and the inner wall of the rear main sleeve 7 naturally forms the slag-holding space 27. The slag-holding space 27 can hold the debris generated by the explosion of the nail gun bullet. Without this space, the debris would easily cause the parts to stick together, requiring frequent disassembly and cleaning. This utility model can extend the cleaning and maintenance cycle of the whole machine.

[0047] Furthermore, the rear main sleeve 7 and the hammer sleeve 4 are in a sleeve relationship, with their diameters being compatible. In their natural state, the top of the brake pin 14 protrudes beyond the outer diameter of the hammer sleeve 4. During assembly, the top of the brake pin 14 enters between the two inner protrusions 8. After entering, the slag-holding space 27 can accommodate the top of the brake pin 14. At this time, the slag-holding space 27 serves to make way for the accommodating space. In previous products, because they were in a single sleeve relationship, there was no accommodating space, so it was necessary to separately machine a groove on the rear main sleeve 7 (i.e., the firing groove described in the background art) specifically to accommodate the top of the brake pin 14.

[0048] The protective sleeve 29 is fitted over the rear main sleeve 7 and mainly serves to prevent the reset pin 15 from falling off. Because of the reduced diameter tube 9, a chip-containing space 28 is naturally formed between the outer wall of the reduced diameter tube 9 and the inner wall of the protective sleeve 29. The chip-containing space 28 can accommodate the debris and residue that fall out of the reset outer groove 13, avoiding the problem of easy adhesion between the protective sleeve 29 and the rear main sleeve 7 that existed in the past, thereby extending the maintenance cycle.

[0049] To better illustrate the inventiveness of this utility model, structural diagrams of previous products are provided for reference, such as... Figure 10 , Figure 11 , Figure 12 , Figure 13 As shown, the disadvantages include a large amount of machining required before and after the main sleeve, the need to set four slots at the rear of the main sleeve for pin insertion and clearance, the lack of slag-holding space, and the need for alignment during assembly, etc.

Claims

1. An axial nail gun with a pressing-type main sleeve, comprising a main sleeve, a hammer, a hammer sleeve, and a nail tube, wherein the main sleeve includes a front main sleeve and a rear main sleeve, characterized in that: The rear main sleeve has an inner protrusion on its inner wall, and a reduced diameter tube at the rear end of the rear main sleeve. The inner transition surface between the rear main sleeve and the reduced diameter tube is a firing ramp or firing arc surface.

2. The axial nail gun with a pressing-type main sleeve according to claim 1, characterized in that: The inner protrusion and the inner wall of the reduced-diameter tube can support the hammer sleeve.

3. The axial nail gun with a pressing-type main sleeve according to claim 1 or 2, characterized in that: The top surface of the inner protrusion is a concave arc surface.

4. The axial nail gun with a press-type main sleeve according to claim 1 or 2, characterized in that: The hammer sleeve has a reset inner groove, the rear main sleeve has a reset outer groove, and the reset pin on the hammer is located in the reset inner groove and the reset outer groove; the brake pin on the hammer is located in the reset inner groove.

5. The axial nail gun with a press-type main sleeve according to claim 4, characterized in that: The brake pin is located after the reset pin.

6. The axial nail gun with a press-type main sleeve according to claim 1 or 2, characterized in that: The convex ring of the nail tube is provided with an annular groove A.

7. The axial nail gun with a press-type main sleeve according to claim 1 or 2, characterized in that: It also includes a movable sleeve, on the outer wall of which is provided an annular groove B.

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