Normally closed dustproof gun nozzle mechanism and nail gun

Abstract

The utility model belongs to the technical field of nail guns, and particularly relates to a normally-closed dustproof gun nozzle mechanism and a nail gun, the normally-closed dustproof gun nozzle mechanism comprises a gun nozzle, the gun nozzle is provided with a nail shooting channel, a firing pin mounting cavity and a dustproof mounting cavity which are communicated with one another; the firing pin is movably arranged in the nail shooting channel and the firing pin mounting cavity, and the firing pin is provided with a firing part and a tooth part arranged on one side of the firing part; the dustproof piece is movably arranged in the dustproof mounting cavity, and the dustproof piece is provided with a firing pin abutting face used for making contact with a firing pin; the reset piece is arranged in the dustproof mounting cavity and used for enabling the firing pin abutting face of the dustproof piece to abut against the firing pin all the time and preventing sundries from entering the firing pin mounting cavity; when the firing pin moves into the nail shooting channel, the tooth part can act on the abutting face of the firing pin and push the dustproof piece to move in the extending direction of the tooth part relative to the impacting part.

Description

Technical Field

[0001] This technical solution relates to the field of nail gun technology, specifically to a normally closed dustproof nozzle mechanism and a nail gun. Background Technology

[0002] A nail gun is a fastening tool, primarily used in construction. Currently, the most widely used nail guns are electric nail guns powered by lithium batteries. These nail guns use a drive motor and a corresponding transmission structure to push a piston component. The piston component then compresses a force spring or compressed gas to store energy. When firing a nail, the force spring or air pressure drives the piston component to move, which in turn drives the firing pin mounted on the piston component to strike and eject the nail.

[0003] Existing nail guns can cause problems when using certain nailing positions. For example, when firing with the muzzle pointing upwards, hard objects or debris such as dust, mud, or nail fragments can easily enter the nozzle assembly along with the firing pin. Eventually, these objects will follow the toothed structure of the firing pin into the transmission mechanism, causing damage to both the transmission mechanism and the toothed structure of the firing pin.

[0004] Chinese patent CN220094505U discloses a driving device for a dustproof nail gun using a spring-loaded mechanism and a nail gun. Although the spring-loaded assembly of this nail gun also has a dustproof function, in actual use, the spring-loaded assembly is located on the side of the firing pin, and the direction of travel of the firing pin and the direction of retraction of the spring-loaded assembly are not on the same plane. Therefore, when no nail is being fired, the firing pin and the spring-loaded assembly work together with the inner wall of the barrel to seal the chamber. At this time, the spring-loaded assembly is used to seal the top surface of the chamber. When nailing is being performed, the firing pin and the spring-loaded assembly work together with the inner wall of the barrel to seal the chamber. At this time, the spring-loaded assembly is used to seal the side of the chamber, and the toothed structure of the firing pin is in direct contact with the inner wall of the barrel. The sealing performance when the toothed structure and the barrel are in contact is poor, and after long-term use, the toothed structure will wear down, resulting in the inability to prevent dust. Summary of the Invention

[0005] The purpose of this technical solution is to provide a normally closed dustproof nozzle mechanism and a nail gun, which solves the problem of poor dustproof effect of the original nail gun by changing the positional relationship and cooperation between the dustproof component and the firing pin.

[0006] The purpose of this technical solution is achieved as follows:

[0007] A normally closed dustproof nozzle mechanism includes: a nozzle having a nail channel, a firing pin mounting cavity, and a dustproof mounting cavity that are interconnected; a firing pin movably disposed in the nail channel and the firing pin mounting cavity, the firing pin having an impact portion and teeth disposed on one side of the impact portion; a dustproof component movably disposed within the dustproof mounting cavity, the dustproof component having a firing pin abutment surface for contacting the firing pin; and a reset component disposed within the dustproof mounting cavity for ensuring that the firing pin abutment surface of the dustproof component always abuts against the firing pin and preventing debris from entering the firing pin mounting cavity; when the firing pin moves into the nail channel, the teeth can act on the firing pin abutment surface and push the dustproof component to move in the direction of extension of the teeth relative to the impact portion.

[0008] Preferably, the firing pin abutment surface has an impact abutment surface arranged along the firing pin axis and an inclined tooth abutment surface, wherein the tooth abutment surface is located at one end of the impact abutment surface near the firing pin mounting cavity.

[0009] Preferably, the front end of the nail-shooting channel extends outward to provide a nail-out channel that matches the outer diameter of the impact part; when the toothed part contacts the tooth abutment surface, the impact part enters the nail-out channel, thereby simultaneously sealing the dustproof mounting cavity and the firing pin mounting cavity.

[0010] Preferably, at least one guide post is provided in the dustproof installation cavity, and at least one waist-shaped hole is provided on the dustproof component; when the dustproof component is installed in the dustproof installation cavity, the guide post is placed in the corresponding waist-shaped hole.

[0011] Preferably, a shock-absorbing component is provided between the dustproof component and the inner wall of the dustproof mounting cavity.

[0012] Preferably, the dustproof mounting cavity is located on one side of the nail gun channel; the cross-sectional width of the dustproof mounting cavity perpendicular to the direction of movement of the dustproof component is adapted to the width of the dustproof component, and the cross-sectional length of the dustproof mounting cavity perpendicular to the direction of movement of the dustproof component is adapted to the length of the dustproof component; when the dustproof component moves within the dustproof mounting cavity, it is always able to seal the dustproof mounting cavity.

[0013] Preferably, the bottom of the nozzle is provided with a dustproof mounting groove and a cover plate, and the dustproof mounting groove and the cover plate together form a dustproof mounting cavity.

[0014] Preferably, the dustproof mounting cavity is a dustproof guide groove formed on the side of the nozzle, and the nozzle is also provided with a cover for limiting the dustproof component. The reset component abuts between the dustproof component and the cover. The cover at least partially covers the opening of the dustproof guide groove.

[0015] Preferably, the cover has a drainage slope on the side near the nail outlet channel.

[0016] A nail gun, including a nozzle mechanism.

[0017] The key and beneficial technical effects of this technical solution compared to existing technologies are:

[0018] 1. The dustproof component designed in this technical solution is always in contact with the firing pin, and the direction of the dustproof component's retraction under pressure is the same as the direction in which the teeth are set on the impact part. In this way, the dustproof component, together with the reset component, can dynamically seal the firing pin mounting cavity. That is, the dustproof component is always in contact with the firing pin, which solves the problem of poor internal sealing of the original nail gun, and also solves the problem of the nail gun's teeth wearing down after long-term use, causing it to be unable to seal.

[0019] 2. This technical solution is designed so that the firing pin can directly seal the nail ejection channel, and can also be used with a dustproof component to seal the nail injection channel. At the same time, the dustproof component can directly seal the dustproof mounting cavity. These multiple sealing effects are sufficient to seal the firing pin mounting cavity, preventing dust and impurities from entering the nail gun and ensuring the normal operation of the internal components of the nail gun. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of Example 1.

[0021] Figure 2 This is an exploded view of Example 1.

[0022] Figure 3 This is a cross-sectional view of Example 1 when the firing pin is not being driven.

[0023] Figure 4 This is a cross-sectional view of the firing pin during nail firing in Example 1.

[0024] Figure 5 This is a schematic diagram of the structure installed on the nail gun in Example 2.

[0025] Figure 6 This is an exploded view of Example 2.

[0026] Figure 7 This is a cross-sectional view of Example 2 when the firing pin is not being driven.

[0027] Figure 8 This is a cross-sectional view of the firing pin during nail firing in Example 2.

[0028] Figure 9 This is a cross-sectional view of the dustproof component located inside the dustproof mounting cavity in Example 2.

[0029] Reference numerals: 1. Nozzle; 2. Nail firing channel; 21. Nail ejection channel; 3. Firing pin mounting cavity; 4. Dustproof mounting cavity; 5. Firing pin; 51. Impact part; 52. Tooth part; 6. Dustproof component; 61. Firing pin abutment surface; 62. Impact abutment surface; 63. Tooth abutment surface; 7. Reset component; 8. Guide post; 9. Waist-shaped hole; 10. Cover plate; 14. Cover; 15. Drainage slope; 16. Nozzle mechanism. Detailed Implementation

[0030] The specific implementation of this technical solution will be further described in detail below with reference to the accompanying drawings.

[0031]

Example 1

[0032] A nail gun includes a nozzle mechanism 16, a drive mechanism, and an energy storage mechanism. The nozzle mechanism 16 connects the drive mechanism and the energy storage mechanism. The drive mechanism is used to drive the firing pin to move, the energy storage mechanism is used to provide the firing pin with nail-shooting power, and the nozzle mechanism 16 is used to guide the nail to be fired.

[0033] The nozzle mechanism 16 includes a firing pin, and the drive mechanism includes a drive motor, a reducer, and a drive wheel. The drive wheel is used to engage the teeth 52 of the firing pin 5. When the drive motor drives the wheel to rotate through the reducer, the drive wheel drives the firing pin 5 to move through the teeth 52 and realizes the energy storage mechanism to store power. When the drive wheel and the teeth 52 disengage, the firing pin 5 is fired under the action of the energy storage mechanism to realize the nail firing.

[0034] like Figure 1 and Figure 2As shown, a normally closed dustproof nozzle mechanism 16 includes a nozzle 1, a firing pin 5, a dustproof component 6, and a reset component 7. The nozzle 1 has a nail-firing channel 2, a firing pin mounting cavity 3, and a dustproof mounting cavity 4 that are interconnected. The nail-firing channel 2 connects to the outside, and the nail is fired within the nail-firing channel 2. The firing pin mounting cavity 3 is located behind the nail-firing channel 2 and is used to mount the firing pin 5. The dustproof mounting cavity 4 is located on the side of the nail-firing channel 2 and is used to mount the dustproof component 6. The dustproof component 6 can seal the firing pin mounting cavity 3 through the reset component 7. The firing pin 5 is movably disposed in the nail-firing channel 2 and the firing pin mounting cavity 3. When firing the nail, the firing pin 5 moves from the firing pin mounting cavity 3 into the nail-firing channel 2. The firing pin 5 has an impact portion 51 and a toothed portion 52 disposed on one side of the impact portion 51. The impact portion 51 is used to strike... When the nail is fired, the toothed part 52 is used to cooperate with the other components of the nail gun to obtain the striking power. The toothed part 52 is located on the rear side of the impact part 51. The dustproof part 6 is movably disposed in the dustproof mounting cavity 4. The dustproof part 6 has a firing pin abutment surface 61 for contacting the firing pin 5. The reset part 7 is disposed in the dustproof mounting cavity 4 to ensure that the firing pin abutment surface 61 of the dustproof part 6 always abuts against the firing pin 5, thereby sealing the firing pin mounting cavity 3. When the firing pin 5 is located in the firing pin mounting cavity 3, the impact part 51 and the firing pin abutment surface 61 are in contact. When the firing pin 5 moves into the nail channel 2, the toothed part 52 and the firing pin abutment surface 61 are in contact, and can act on the firing pin abutment surface 61 at the same time, and push the dustproof part 6 to move in the direction of the toothed part 52 relative to the extension of the impact part 51.

[0035] Furthermore, the impact abutment surface 61 has an impact abutment surface 62 arranged along the axis of the impact pin 5 and an inclined tooth abutment surface 63. The tooth abutment surface 63 is located at one end of the impact abutment surface 62 near the impact pin mounting cavity 3. The inclined tooth abutment surface 63 is used on the one hand to realize automatic avoidance of the high-speed moving impact pin 5, thereby reducing wear and noise; on the other hand, it is used to cooperate with the tooth part 52 to always seal the impact pin mounting cavity 3, preventing external dust and debris from entering the impact pin mounting cavity 3.

[0036] Furthermore, a shock absorber is provided between the dustproof component 6 and the inner wall of the dustproof mounting cavity 4. The shock absorber can be provided on the inner wall of the mounting cavity or on the side wall of the dustproof component 6. The shock absorber is preferably a rubber pad, which has the advantages of buffering, shock absorption, and noise reduction.

[0037] like Figure 2-4 and Figure 9As shown, the dustproof mounting cavity 4 is located on one side of the nail gun channel 2. The setting direction of the dustproof mounting cavity 4 relative to the nail gun channel 2 is the same as the setting direction of the tooth 52 relative to the impact part 51. The cross-sectional width of the dustproof mounting cavity 4 perpendicular to the direction of movement of the dustproof component is D, which matches the width of the dustproof component 6. The cross-sectional length of the dustproof mounting cavity 4 perpendicular to the direction of movement of the dustproof component is L, which matches the length of the dustproof component 6. In this way, when the dustproof component 6 moves in the dustproof mounting cavity 4, it can always seal the dustproof mounting cavity 4, preventing dust and debris from entering the firing pin mounting cavity 3 from the outside along the dustproof mounting cavity 4.

[0038] like Figure 2-4 As shown, since the tooth 52 protrudes from one side of the impact part 51, when driving the nail upwards, external dust and debris will enter the nail gun through the gap between the tooth 52 and the impact part 51. Therefore, we need to ensure that the dustproof part 6 always abuts against the firing pin 5 to achieve the sealing of the firing pin mounting cavity 3.

[0039] like Figure 3 As shown, when the firing pin 5 is located in the firing pin mounting cavity 3, the dustproof component 6 abuts against the side of the firing pin 5 head through the action of the reset component 7. At this time, the inner wall of the nozzle 1 (the inner wall of the nail channel 2), the dustproof component 6 and the head of the firing pin 5 cooperate to seal the firing pin mounting cavity 3, preventing dust and debris from entering the firing pin mounting cavity 3 through the nail channel 2.

[0040] like Figure 4 As shown, when the firing pin 5 moves into the nail channel 2, the teeth 52 can squeeze the dustproof part 6. At this time, the inner wall of the nozzle 1 (the inner wall of the nail ejection channel 21), the dustproof part 6 and the teeth 52 cooperate to seal the firing pin mounting cavity 3, preventing dust and debris from entering the firing pin mounting cavity 3 through the nail channel 2.

[0041] like Figure 2-4 As shown, the front end of the nail gun channel 2 extends outward and is provided with a nail ejection channel 21 that is adapted to the outer diameter of the impact part 51. Both the impact part 51 and the nail gun channel 2 are cylindrical. The impact part 51 can directly seal the nail ejection channel 21. Therefore, by designing the length of the impact part 51, when the tooth part 52 contacts the tooth abutment surface 63, the impact part 51 enters the nail ejection channel 21. The impact part 51 provides the first layer of protection and sealing for the nail ejection channel 21, and the tooth part 52 and the tooth abutment surface 63 provide the second layer of protection and sealing. This can better achieve the sealing of the internal space of the nail gun.

[0042] Furthermore, during the process of the firing pin 5 moving towards the nail ejection channel 2, before the tooth 52 and the tooth abutment surface 63 come into contact, the impact part 51 is always in contact with the impact abutment surface 62. When the tooth 52 and the tooth abutment surface 63 come into contact, the impact part 51 has already approached or is already located in the nail ejection channel 21. At the same time, since the firing pin 5 moves at a relatively fast speed, the difference between "already approaching the nail ejection channel 21" and "already located in the nail ejection channel 21" can be ignored.

[0043] like Figure 2-4 As shown, at least one guide post 8 is provided in the dustproof installation cavity 4, and at least one waist-shaped hole 9 is provided on the dustproof component 6. When the dustproof component 6 is installed in the dustproof installation cavity 4, the guide post 8 is placed in the corresponding waist-shaped hole 9. The design of the guide post 8 and the waist-shaped hole 9 can ensure the stability of the dustproof component 6 during movement and ensure that the dustproof component 6 will not deviate during movement.

[0044] like Figure 2 As shown, the opening of the mounting cavity faces the bottom surface of the nozzle 1. The nozzle 1 is provided with a cover plate 10 for limiting the dustproof component 6. The cover plate 10 is designed to enable the quick installation and removal of the dustproof component 6 and the reset component 7. The cover plate 10 is located on one side of the bottom of the nozzle 1. When the nail is fired horizontally, the cover plate 10 is at the bottom, which can better achieve the dustproof function.

[0045]

Example 2

[0046] The setup in this embodiment is largely the same as in embodiment 1, except for the installation method of the dustproof component 6 and the reset component 7. In this embodiment, in order to fix the dustproof component 6, we set a cover 14 on the nozzle 1. The two ends of the reset component 7 abut against the dustproof component 6 and the inner wall of the cover 14 respectively. The cover 14 closes or partially closes the opening of the dustproof mounting cavity 4. When the nail is fired horizontally, the cover 14 is located at the bottom of the nail gun. Therefore, the front part of the partially closed opening of the cover 14 can also be used for dust prevention. When the nail is fired vertically upward, the drainage slope 15 designed on the side of the cover 14 near the nail outlet channel 21 can guide the dust and debris to the side of the nail gun, so that they cannot enter the dustproof mounting cavity 4 along the opening, and thus cannot enter the firing pin mounting cavity 3.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of this technical solution. Those skilled in the art should understand that this technical solution is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this technical solution. Various changes and modifications can be made to this technical solution without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed technical solution. The scope of protection of this technical solution is defined by the appended claims and their equivalents.

Claims

1. A normally closed dust nozzle mechanism, characterized in that, include: The nozzle (1) has a nail channel (2) that is interconnected, a firing pin mounting cavity (3) and a dustproof mounting cavity (4); The firing pin (5) is movably disposed within the nail channel (2) and the firing pin mounting cavity (3). The firing pin (5) has an impact part (51) and a tooth part (52) disposed on one side of the impact part (51). A dustproof component (6), movably disposed within the dustproof mounting cavity (4), the dustproof component (6) having a firing pin abutment surface (61) for contacting the firing pin (5); and The reset component (7) is disposed in the dustproof mounting cavity (4) to ensure that the firing pin abutment surface (61) of the dustproof component (6) always abuts against the firing pin (5) and to prevent debris from entering the firing pin mounting cavity (3); When the firing pin (5) moves into the nail channel (2), the teeth (52) can act on the firing pin abutment surface (61) and push the dustproof part (6) to move in the direction of extension of the teeth (52) relative to the impact part (51).

2. The normally closed dust nozzle mechanism according to claim 1, characterized in that: The striker abutment surface (61) has an impact abutment surface (62) arranged along the axis of the striker (5) and an inclined tooth abutment surface (63), wherein the tooth abutment surface (63) is located at one end of the impact abutment surface (62) near the striker mounting cavity (3).

3. The normally closed dust nozzle mechanism according to claim 2, characterized in that: The front end of the nail-shooting channel (2) extends outward and is provided with a nail-out channel (21) that is adapted to the outer diameter of the impact part (51); When the tooth (52) contacts the tooth abutment surface (63), the impact part (51) enters the nail ejection channel (21), thereby sealing the dustproof mounting cavity (4) and the firing pin mounting cavity (3).

4. The normally closed dust nozzle mechanism according to claim 3, characterized in that: At least one guide post (8) is provided inside the dustproof installation cavity (4), and at least one waist-shaped hole (9) is provided on the dustproof component (6); When the dustproof component (6) is installed in the dustproof mounting cavity (4), the guide post (8) is placed in the corresponding waist-shaped hole (9).

5. A normally closed dust nozzle mechanism according to claim 4, characterized in that: A shock-absorbing component is provided between the dustproof component (6) and the inner wall of the dustproof mounting cavity (4).

6. A normally closed dust nozzle mechanism according to any one of claims 2-5, characterized in that: The dustproof mounting cavity (4) is located on one side of the nail gun channel (2); The width of the cross section of the dustproof mounting cavity (4) perpendicular to the direction of movement of the dustproof component (6) is adapted to the width of the dustproof component (6), and the length of the cross section of the dustproof mounting cavity (4) perpendicular to the direction of movement of the dustproof component (6) is adapted to the length of the dustproof component (6). When the dustproof component (6) moves within the dustproof mounting cavity (4), it is always able to seal the dustproof mounting cavity (4).

7. A normally closed dust nozzle mechanism according to claim 6, characterized in that: The bottom of the nozzle (1) is provided with a dustproof mounting groove and a cover plate (10), which together with the cover plate (10) form a dustproof mounting cavity (4).

8. A normally closed dust nozzle mechanism according to claim 6, characterized in that: The dustproof mounting cavity (4) is a dustproof guide groove opened on the side of the nozzle (1). The nozzle (1) is also provided with a cover (14) for limiting the dustproof component (6). The reset component (7) abuts between the dustproof component (6) and the cover (14). The cover (14) at least partially covers the opening of the dustproof guide groove.

9. A normally closed dust nozzle mechanism according to claim 8, characterized in that: The cover (14) has a drainage slope (15) on the side near the nail outlet channel (21).

10. A nail gun, characterized in that, include: The nozzle mechanism (16) as described in any one of claims 1-9.

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