CN109514501B

CN109514501B - Cement nail gun

Info

Publication number: CN109514501B
Application number: CN201811629910.0A
Authority: CN
Inventors: 刘贵文; 杨明军; 厉敏; 黄锦全; 宋中海; 肖贵聪
Original assignee: Taizhou Dajiang Industry Co Ltd
Current assignee: Taizhou Dajiang Industry Co Ltd
Priority date: 2018-12-28
Filing date: 2018-12-28
Publication date: 2024-02-27
Anticipated expiration: 2038-12-28
Also published as: CN109514501A

Abstract

The invention discloses a cement nail gun, and belongs to the technical field of fastening. A cement nail gun comprises a cylinder, wherein a piston assembly is slidably arranged in the cylinder, and the piston assembly is used for compressing air at the rear end of the piston assembly in the moving process and is provided with a cavity at the front end Cheng Zhen of the piston assembly; the front end of the piston assembly is provided with an impact head, and the front end of the impact head is provided with a firing pin; the rear end of the piston assembly is connected with a driving device which is used for driving the piston assembly to move in the cylinder and firing the striker to move. Preferably, the driving device comprises a rack pull rod, a driving gear is arranged on the outer side of the air cylinder, and the driving gear is matched and meshed with the rack pull rod. According to the technical scheme, the difference value of the atmospheric pressure at the front end and the rear end inside the cylinder is used as power to drive the piston to move. And the whole process adopts a mechanical structure, and does not use gunpowder or an air compressor as an external power source, so that the environment-friendly and safe air compressor is very environment-friendly and very convenient to use, and does not need an external power supply.

Description

Cement nail gun

Technical Field

The invention belongs to the technical field of fastening, in particular to a cement nail gun.

Background

At present, the traditional method for installing the domestic suspended ceiling is as follows: a construction method for binding a percussion drill on the end of a long rod, enabling an operator to hold the long rod to enable the percussion drill to punch holes in the bottom of a ceiling, installing expansion bolts, installing hanging rods on the bolts, and installing a suspended ceiling on the hanging rods. The traditional method is time-consuming, labor-consuming, high in cost and low in labor efficiency. In recent years, a powder nail gun has appeared in the market, and the principle is to use powder explosion to drive steel nails into cement. Its advantages are high effect and low labor intensity.

Meanwhile, pneumatic nail guns are also used for fastening cement in the market, but the pneumatic nail guns also need a compressor for air supply, equipment and cost are increased, portability is poor, and transportation is inconvenient.

Disclosure of Invention

The invention aims to provide the cement nail gun which does not need an air compressor for air supply, has large nailing force, no recoil, low noise, low consumable cost, convenient maintenance, safe use and no need of safety supervision.

The purpose of the invention is realized in the following way: a cement nailing gun comprises a cylinder, wherein a piston assembly is slidably arranged in the cylinder, and the piston assembly is used for discharging air at the rear end of the piston assembly and compressing a cavity Cheng Zhen at the front end of the piston assembly in the moving process; the front end of the piston assembly is provided with an impact head, and the front end of the impact head is provided with a firing pin; the rear end of the piston assembly is connected with a driving device which is used for driving the piston assembly to move in the cylinder and firing the striker to move.

Preferably, the driving device comprises a rack pull rod, a driving gear is arranged on the outer side of the air cylinder, and the driving gear is matched and meshed with the rack pull rod.

Preferably, one end of the driving gear is provided with a sleeved column, a hand crank is sleeved outside the sleeved column, and the hand crank is used for driving the driving gear to rotate.

Preferably, a clamping pawl is rotatably arranged on one side of the driving gear, and the clamping pawl is matched with the rack pull rod.

Preferably, mounting seats are respectively arranged on two sides of the rack pull rod, and the clamping pawl and the driving gear are rotatably arranged between the two mounting seats.

Preferably, a mounting hole is formed in the rear side of the clamping pawl, a limiting pressing sheet is fixedly arranged on the upper side of the rear end of the mounting seat, and an extension spring is arranged between the limiting pressing sheet and the mounting hole; a rear limiting pin is further arranged between the two mounting seats, and the rear limiting pin is located at the rear side of the clamping pawl.

Preferably, the piston assembly comprises a piston body, the impact head being disposed within the piston body; the rear end of the impact head is provided with a limiting part; the piston assembly further comprises a lock catch assembly arranged on the outer side of the rear end of the impact head, and the lock catch assembly is matched with the limiting part to realize connection and release of the impact head.

Preferably, the locking assembly at least comprises a locking pawl, and the locking pawl is propped against the limiting part; the piston assembly also comprises locking brackets arranged at two sides of the locking pawl, and the locking pawl is connected with the driving device through the locking brackets; the inner side of the locking bracket is provided with a front limiting pin, one side of the locking pawl is provided with a limiting surface, and the front limiting pin is positioned at the rear end of the limiting surface and used for limiting the rotation angle of the locking pawl.

Preferably, a connecting column is formed at the rear end of the locking support, and one end of the driving device is fixedly arranged in the connecting column.

Preferably, a locking short column is formed at the lower end part of the locking pawl, and an inclined plane of the locking short column abuts against an inclined plane of the limiting part to play a role in locking.

Preferably, the limit part is a ring groove; the number of the lock catch components is at least two, and the lock catch components are uniformly distributed in the annular groove.

Preferably, the piston assembly further comprises a guide disc; the guide disc is characterized in that a groove is formed in the outer edge of the guide disc, and a first sealing ring is arranged in the groove.

Preferably, two sides of the front end of the guide disc are respectively provided with a connecting lug, and the rear end of the locking bracket is arranged between the two connecting lugs and fixedly connected with the connecting lugs.

Preferably, a trigger fixing seat is arranged at the outer side of the driving device, the trigger fixing seat and the mounting seat are coaxially arranged, and the trigger fixing seat is arranged at the outer side of the mounting seat; the outer side of the firing fixing seat is fixedly provided with a plurality of firing ejector rods, and the firing ejector rods are in one-to-one correspondence with the locking pawls; a second spring is abutted between the rear end cover and the firing fixing seat; a first spring is arranged between the guide disc and the locking pawl; the guide plate is also provided with a plurality of vent holes.

Preferably, the rear end of the cylinder is provided with a rear end cover, a plurality of ventilation holes are formed in the rear side of the rear end cover, and the firing ejector rod is arranged in the ventilation holes in a penetrating mode.

Preferably, the front end of the cylinder is provided with a front end cover, the inner side of the front end cover is provided with a sealing ring bracket, the outer side of the sealing ring bracket and/or the piston main body is provided with a Y-shaped sealing ring, and the firing pin is slidably arranged in the Y-shaped sealing ring; at least one second sealing ring is sleeved on the outer side of the sealing ring support; the outer end face of the Y-shaped sealing ring is provided with an elastic groove, and the upper end and the lower end of the elastic groove respectively lean against the inside of the cylinder and the outer end face of the piston main body.

Preferably, a guide sleeve is arranged at the rear end of the inner side of the front end cover, and the firing pin is slidably arranged in the guide sleeve; the rear end of the guide sleeve is provided with a step part in a forming mode, and the inner side of the front end cover is provided with a limiting hole matched with the step part in a forming mode.

Preferably, the firing pin comprises at least a front needle head and a rear needle body; gun nozzles are arranged on the outer sides of the front needle head and the rear needle body, and are arranged on the front side of the front end cover; the step at the front end of the rear needle body is limited at the front end of the inner hole of the sealing ring bracket, and a storage hole for installing nails is formed in the front needle head.

Preferably, the front end of the gun nozzle is also connected with a gun head, and the rear end of the gun head is arranged at the inner side of the gun nozzle; the front end of the front needle head is slidably arranged at the gun head, and the rear end of the front needle head is formed with an abutting end for limiting.

Preferably, the inner side of the rear end of the front end cover is sequentially provided with a buffer block and a buffer sealing sleeve from inside to outside, the outer side of the buffer sealing sleeve is sleeved with a third sealing ring, and the third sealing ring abuts against the inner side of the cylinder.

Preferably, a sealing installation groove is formed in the front end face of the buffer sealing sleeve in a backward mode, a fourth sealing ring is installed in the sealing installation groove, and the front end of the fourth sealing ring abuts against the inner side of the front end cover; the outer edge of the rear end of the buffer sealing sleeve is provided with a step-shaped sealing part, and the rear side of the sealing part is abutted against the front end surface of the cylinder; the front end of the impact head is formed with a stress part.

Preferably, the rear side of the buffer block is formed with a conical horn mouth, and the front end of the piston assembly is formed with a piston front column matched with the conical horn mouth.

Preferably, a push rod sleeve is arranged at the rear end of the air cylinder, the rear end of the driving device is sleeved in the push rod sleeve, a movable plug is connected with the rear end of the driving device, a rear end limiting plug screw is arranged at the rear end of the movable plug, and a return spring is abutted between the rear end limiting plug screw and the movable plug.

Compared with the prior art, the invention has the following outstanding and beneficial technical effects:

1. according to the technical scheme, the difference value of the atmospheric pressure at the front end and the rear end inside the cylinder is used as power to drive the piston to move. And the whole process adopts a mechanical structure, and does not use gunpowder or an air compressor as an external power source, so that the environment-friendly and safe air compressor is very environment-friendly and very convenient to use, and does not need an external power supply. And simultaneously solves an important safety problem.

2. The rack and pinion is used as power for driving, the acting force is large and stable, the action of releasing and clamping can be realized by matching with the matching of the clamping pawls, and the whole design is very exquisite.

3. The piston assembly adopts a sealing structure at a plurality of positions, and has good sealing effect.

4. The invention is also very simple to trigger after the potential is in place. The nail can be automatically hit by only abutting the nail on a processing surface, such as a cement surface and pushing the piston to form a small stroke by the elasticity of the spring, so that the nail is very convenient and safe.

5. The invention realizes the function through the mechanical structure, does not generate any waste or toxic substances in the whole process, saves energy, protects the environment, simultaneously greatly reduces the cost of consumable materials, and greatly improves the service life of the whole equipment.

Drawings

FIG. 1 is one of the simplified structural diagrams of the present invention;

FIG. 2 is a schematic view of the structure of a Y-shaped seal ring;

FIG. 3 is one of the cross-sectional views of FIG. 1;

FIG. 4 is a second cross-sectional view of FIG. 1;

FIG. 5 is an enlarged view of a portion of FIG. 3 at A;

FIG. 6 is a partial enlarged view at B in FIG. 4;

FIG. 7 is an enlarged view of a portion of FIG. 4 at C;

FIG. 8 is a partial enlarged view at D in FIG. 4;

fig. 9 is a schematic structural view of the driving device;

FIG. 10 is one of the simplified structural diagrams of the present invention;

FIG. 11 is a schematic view of the seal structure at the front end cap;

fig. 12 is a schematic diagram of the operation of the latch assembly.

In the figure: 1-a cylinder; 2-a piston assembly; 3-a driving device; 4-a latch assembly; 5-gun nozzle; 6-gun head; 7-a buffer block; 8-a buffer seal sleeve; 9-push rod sleeve; 10-a dust cover; 11-vacuum chamber; 12-firing pin; 13-a rear end cap; 14-a second spring; 15-a first spring; 16-front end cap; 17-a seal ring bracket; 18-Y-shaped sealing rings; 19-a guide sleeve; 21-an impact head; 22-a piston body; 23-a guide disc; 24-a stress part; 25-piston front column; 31-a rack bar; 32-a drive gear; 33-detent pawl; 34-mounting base; 35-limiting tabletting; 36-stretching a spring; 37-a rear-mounted limiting pin; 38-firing a fixed seat; 39-firing the ejector pin; 41-locking pawl; 42-locking the bracket; 43-front limiting pin; 71-a conical flare; 81-a third sealing ring; 82-sealing the mounting groove; 83-a fourth seal ring; 84-sealing part; 91-a movable plug; 92-limiting screw plugs; 93-homing spring; 121-a front needle; 122-rear needle body; 131-ventilation holes; 161-limiting holes; 171-a second sealing ring; 181-elastic grooves; 191-a step; 211-a limiting part; 213-inclined plane; 231-sealing grooves; 232-a first sealing ring; 233-connecting ears; 234-vent holes; 321-sleeve joint columns; 322-handle; 323-socket holes; 331-mounting holes; 411-limit surface; 412-locking stub; 413-inclined plane; 421-connection column.

Detailed Description

The invention is further described below with reference to specific examples.

Embodiment one: as shown in fig. 1 to 12, a cement nail gun comprises a cylinder 1, wherein a piston assembly 2 is slidably arranged in the cylinder 1, and the piston assembly 2 is used for discharging air at the rear end of the piston assembly 2 and forming a vacuum cavity 11 at the front end of the compression piston assembly 2 in the moving process; the front end of the piston assembly 2 is provided with an impact head 21, and the front end of the impact head 21 is provided with a firing pin 12; the rear end of the piston assembly 2 is connected with a driving device 3, and the driving device 3 is used for driving the piston assembly 2 to move in the cylinder 1 and firing the striker 12 to move.

The technical scheme specifically describes a cement nail gun which uses the difference between the internal and external atmospheric pressure as power to carry out nailing operation. Specifically, in actual use, when the driving device 3 drives the piston assembly 2 to move towards the rear side in the cylinder 1, the front end of the piston assembly 2 forms a vacuum chamber 11, and a normal atmospheric pressure is maintained at the rear end of the piston assembly 2, so that an air pressure difference between the inside and the outside is formed, which has the advantage that when the driving device 3 releases the connection to the piston assembly 2, the piston assembly 2 can strike the striker 12 at an extremely high speed under the action of the atmospheric pressure, so that nails to be driven can be driven into a cement wall or other wall surface. The piston assembly 2 in the technical scheme mainly reduces the air pressure at the front end of the piston assembly 2 as far as possible in the cylinder 1, and can realize a vacuum state in an ideal state to form sealing states at the front side and the rear side. As to how the piston assembly 2 performs a vacuum-like action in the sliding process in the cylinder 1, that is, how to perform sealing is common knowledge of those skilled in the art, and will not be described in detail herein. Meanwhile, the structure corresponding to the driving device 3 can adopt hydraulic or pneumatic or other structures capable of driving the piston assembly 2 to move in the cylinder 1, so that the technical scheme can be realized. The solutions described above are not repeated here, but the solutions are considered to be applicable both in the field of nailers and in the field of daily mechanical engineers. Reference may be made in particular to publication 2015100537641 which describes a nailer incorporating a piston structure therein, or to publication: 108150583A, which describes in particular a combined device of a piston cylinder 1. The contents of the present technical solution are thus complete and sufficient. Meanwhile, the impact force required by driving nails into a cement wall surface or other wall surfaces and the impact force required by the cement wall surface or other wall surfaces are calculated, and the length calculation of the air cylinder 1 is used for realizing the enough pressure for storing to manufacture enough impact force, which belongs to the problem of mechanical property calculation and is not the key point of the patent protection, so that the relevant parameters are omitted.

Preferably, the driving device 3 comprises a rack pull rod 31, a driving gear 32 is arranged outside the air cylinder 1, and the driving gear 32 is matched and meshed with the rack pull rod 31.

The technical scheme specifically discloses a driving structure principle. In the actual use process, the driving gear 32 is rotated to drive the rack pull cylinder to move towards the rear end of the cylinder 1, and the piston assembly 2 and the driving device 3 are connected, more specifically, the piston assembly 2 and the rack pull rod 31 are connected, so that the driving of the piston assembly 2 towards the rear end of the cylinder 1 can be realized through the design. And the gear rack has the structural form that the power transmission is stable, the transmission torque can be relatively large, and the whole structure is simple and stable. In practice, the movement of the piston assembly 2 is achieved by simply rotating the drive gear 32.

Preferably, a socket post 321 is formed at one end of the driving gear 32, a crank 322 is sleeved outside the socket post 321, and the crank 322 is used for driving the driving gear 32 to rotate.

The present embodiment specifically describes a way to turn the drive gear 32. In practical use, the so-called socket 321 may be a polygonal prism section, and then the handle 322 has a socket hole 323 adapted to the prism section, so that the drive gear 32 can be rotated when the handle 322 is rotated by engagement between the socket hole 323 and the prism section. Moreover, the design of the handle 322 may increase the torque by mechanical design, thereby reducing the force required to turn the drive gear 32. The detailed mechanical structure is not the focus of this patent application, and will not be described in detail. Meanwhile, the design can thoroughly solve the problem of needing an external power source, and extra equipment such as a compressor and the like can be completely abandoned in actual use. Particularly in places with severe environments, when no power supply exists, the technical scheme can completely get rid of the constraint of the power supply. Therefore, compared with the prior art, the technical scheme is more energy-saving and environment-friendly, and is labor-saving, mute and stable.

Preferably, a detent pawl 33 is rotatably disposed on one side of the driving gear 32, and the detent pawl 33 is adapted to the rack bar 31.

The technical scheme specifically illustrates the effect of realizing limit by utilizing the pawl or ratchet principle design. In practical design, the engagement pawl 33 is adapted to the rack bar 31, that is, the lower end of the engagement pawl 33 is partially embedded in the gap between the teeth of the rack bar 31, and the lower end is inclined toward the rear end. Therefore, when the rack bar 31 moves backwards only, the clamping pawl 33 can slide towards the rear end by passing back and forth without affecting the rack bar 31; however, when the rack bar 31 slides toward the front side, the rack bar 31 is prevented from moving toward the front end because the click pawl 33 abuts between the teeth. The design has the advantage that the device can give people a rest time similar to a brake device. That is, for example, when the hand crank 322 is turned and stopped for rest, no additional action is required, and the position of the rack bar 31 can be fixed due to the positional relationship between the click 33 and the teeth. Such a design is very humanized. An additional benefit is that the rack bar 31 is stationary as the piston moves forward, since it can be designed to separate the piston from the rack bar 31 when all the nailing operations are completed. If the rack pull rod 31 is required to reset, the lower end of the clamping pawl 33 can be naturally reset by utilizing gravity just by pulling the clamping pawl 33 for an angle so that the lower end of the clamping pawl 33 is separated from the engagement between the teeth, and the whole process is very simple and clear.

Preferably, the rack bar 31 is provided with mounting seats 34 on both sides thereof, and the detent pawl 33 and the driving gear 32 are rotatably disposed between the two mounting seats 34.

The technical scheme specifically describes the installation mode of the clamping pawl 33 and the driving gear 32. The positioning pawl 33 and the driving gear 32 are installed between the two installation seats 34, so that the tooth surface part of the rack pull rod 31 can be meshed with the positioning pawl 33 and the driving gear 32. Preferably, the tooth surface portion of the rack bar 31 should be designed upward so as to facilitate the operation. While the manner in which it is "rotatable" is varied. Preferably, the rotatable mode is that a pin shaft passes through the clamping pawl 33 and the two mounting seats 34 at the same time; or one pin shaft passes through the clamping pawl 33 and the two mounting seats 34 at the same time.

Preferably, as shown in fig. 9, a mounting hole is formed at the rear side of the detent pawl 33, a limiting pressing piece 35 is fixedly arranged at the upper side of the rear end of the mounting seat 34, and a tension spring 36 is arranged between the limiting pressing piece 35 and the mounting hole 331; a rear limiting pin 37 is further disposed between the two mounting seats 34, and the rear limiting pin 37 is located at the rear side of the detent pawl 33.

The technical scheme specifically describes a method for increasing the abutting pressure of the clamping pawl 33 and the rack pull rod 31. Specifically, since the extension spring 36 is disposed between the rear side of the detent pawl 33 and the upper side of the rear end of the mounting seat 34, that is, there is always a tendency for the detent pawl 33 to rotate backward during daily use, the detent pawl 33 can be quickly reset after rotation, and can be clamped between the teeth of the rack bar 31 during the next rotation. Preventing the occurrence of the disconnection of the click 33. And the rear limit pin 37 is used for limiting the swing angle of the clamping pawl 33. Specifically, in the actual use process, if the swing amplitude of the clamping pawl 33 is too large, the clamping pawl 33 is easily caused to be not accurately clamped between the teeth of each rack pull rod 31, if the pulling force to the rack pull rod 31 is just stopped at this time, the rack pull rod 31 can rapidly impact to the front end under the action of pressure, so that the limiting effect cannot be realized, and the operating workers are easily damaged by the hand crank 322.

Preferably, the piston assembly 2 comprises a piston body 22, the striking head 21 being arranged inside the piston body 22; a limit part 211 is formed at the rear end of the impact head 21; the piston assembly 2 further comprises a locking assembly 4 arranged on the outer side of the rear end of the impact head 21, and the locking assembly 4 is matched with the limiting part 211 to realize connection and release of the impact head 21. The technical scheme specifically describes the structural form of the piston assembly 2, and the design mode can provide a brand new design thought. In conventional designs, the piston assembly 2 is typically maintained in a connected relationship with the drive assembly at all times, and moves with the drive means 3 as the piston impacts forward, which results in increased recoil of the overall device. By the design of the latch assembly 4, the impact head 21 can be connected and released. In particular, in actual use, since only the striking head 21 and the piston main body 22 strike as a whole during striking against the striker 12, the speed is faster and the impact force to the front striker 12 is greater. Preferably, the striker 21 and the piston body 22 are made in one piece by means of a threaded connection. The locking device can be similar to the structure of a wide three-jaw chuck in the existing machine tool to realize connection and release; or clamping and release by relative movement of the jaws driven by the cylinder 1.

Preferably, the latch assembly 4 at least includes a locking pawl 41, and the locking pawl 41 abuts against the limiting portion 211; the piston assembly 2 also comprises locking brackets 42 arranged at two sides of the locking pawl 41, and the locking pawl 41 is connected with the driving device 3 through the locking brackets 42; the inner side of the locking bracket 42 is provided with a front limiting pin 43, one side of the locking pawl 41 is formed with a limiting surface 411, and the front limiting pin 43 is located at the rear end of the limiting surface 411 to limit the rotation angle of the locking pawl 41.

The technical scheme specifically illustrates the structural characteristics of the locking device. In practice, the locking bracket 42 is used to connect the locking pawl 41 to the driving device 3, so that it is ensured that the piston assembly 2 is movable with the rear end when the driving device 3 acts on the piston assembly 2. Meanwhile, the locking support 42 is hinged with the locking pawls 41, so that the locking pawls 41 work on the principle that the front limiting pins 43 are used for limiting the rotation angle of the locking pawls 41 through being clamped in the limiting portions 211, and the impact head 21 can be firmly locked in the two locking pawls 41 when the impact head 21 is pulled towards the rear end. Thereby enabling the purpose of evacuation with the other components of the piston assembly 2.

The locking pawl 41 and the locking bracket 42 may be connected in such a manner that a pin shaft passes through the locking pawl 41 to be stably connected with the locking bracket 42 while maintaining rotation. The design and processing are convenient, the assembly is quick, and the installation mode is preferable.

Preferably, a connecting post 421 is formed at the rear end of the locking bracket 42, and one end of the driving device 3 is fixedly disposed in the connecting post 421.

The present technical solution specifically describes a connection manner of the driving device 3 and the locking bracket 42. Specifically, one end of the driving device 3 is fixedly disposed in the connecting post 421, preferably, a hole is formed in the connecting post 421, and then the front end of the driving device 3 extends into the hole, and a shaft passes through the connecting post 421 and the front end of the driving device 3. This allows a firm connection to be established between the drive means 3 and the piston assembly 2. Specifically, the front end of the driving device 3 may be the right end of the rack bar 31.

Preferably, a locking short column 412 is formed at the lower end of the locking pawl 41, and an inclined surface (413) of the locking short column 412 abuts against an inclined surface (213) of the limiting part (211) to perform locking.

The present embodiment specifically describes a structural form of the locking pawl 41. The locking stub 412 is installed to be inclined toward the rear end side of the cylinder 1. Such a design may also be a way to increase the tightness of the connection between the locking pawl 41 and the stop portion 211. Specifically, when the piston assembly 2 integrally moves toward the rear end side of the cylinder 1, the locking stub 412 can firmly abut against the stopper 211. Such a connection is more compact.

Preferably, the limiting part 211 is a ring groove; the number of the lock catch assemblies 4 is at least two, and the lock catch assemblies are uniformly distributed in the annular groove. The technical scheme specifically illustrates the structural form of the limiting part 211, and the ring groove is designed to enable the locking short column 412 to firmly abut against the rear end of the ring groove, so that the locking short column can abut against the rear end of the ring groove more tightly.

Preferably, the piston assembly 2 further comprises a guiding disc 23; the outer edge of the guide disc 23 is formed with a sealing groove 231, and a first sealing ring 232 is arranged in the sealing groove 231.

The present solution specifically describes a stable design that increases the sliding of the piston assembly 2 in the cylinder 1. Specifically, the guide disc 23 is designed to be spaced from the piston body 22. In the actual use process, the piston main body 22 and the guide disc 23 can be kept in contact with the inner wall of the air cylinder 1 at the same time at all times, so that the air tightness can be further improved, and the effect of vacuumizing the front end is improved.

Preferably, two sides of the front end of the guide disc 23 are respectively formed with a connecting lug 233, and the rear end of the locking bracket 42 is disposed between the two connecting lugs 233 and fixedly connected with the connecting lugs 233.

The present solution specifically describes a way of connecting the piston body 22 to the guiding disc 23. Such a connection allows for a tighter connection between the two while also having a range of adjustment. The particular means of securing connection may preferably be by a single shaft passing through both the attachment tab 233 and the locking bracket 42.

Preferably, a firing fixing seat 38 is arranged at the outer side of the driving device 3, the firing fixing seat 38 is coaxially arranged with the mounting seat 34, and the firing fixing seat 38 is arranged at the outer side of the mounting seat 34; a plurality of firing ejector rods 39 are fixedly arranged on the outer side of the firing fixing seat 38, and the firing ejector rods 39 correspond to the locking pawls 41 one by one; the rear end of the cylinder 1 is provided with a rear end cover 13, and a second spring 14 is abutted between the rear end cover 13 and the firing fixing seat 38; a first spring 15 is arranged between the guide disc 23 and the locking pawl 41; the guide plate 23 is further formed with a plurality of ventilation holes 234.

The present technique specifically describes the manner in which the drive means 3 is coupled to and uncoupled from the piston assembly 2. In actual use, when the nails are installed in place, after the driving device 3 is used for pulling the piston assembly 2 to a set position, a certain pushing force is used as long as the nails are aligned to the cement wall surface. Allowing the firing ram 39 to pass through the vent hole 234 and directly abut against the upper end of the lock pawl 41. At this time, the locking pawl 41 rotates by a certain angle so that the locking pawl 41 is separated from the limiting portion 211, and at this time, the piston main body 22 and the striking head 21 together are rapidly punched toward the striker 12 under the action of the air pressure difference, so that the action of firing the striker 12 can be achieved.

Preferably, a plurality of ventilation holes 131 are formed on the rear side of the rear end cover 13, and the firing push rod 39 is inserted into the ventilation holes 131.

The present solution specifically illustrates a preferred manner of mounting the firing ram 39. The design of the ventilation holes 131 can ensure that the air flows into the piston assembly 2 as much as possible to ensure that the pressure difference between the front and the rear is large enough. Meanwhile, the firing ejector rod 39 is arranged in the air hole 131 in a penetrating way, so that the firing ejector rod 39 can touch the upper end part of the locking pawl 41 as soon as possible, and the length of the air cylinder 1 can be reduced.

Preferably, the front end of the cylinder 1 is provided with a front end cover 16, the inner side of the front end cover 16 is provided with a sealing ring bracket 17, the outer side of the sealing ring bracket 17 and/or the piston main body 22 is provided with a Y-shaped sealing ring 18, and the firing pin 12 is slidably arranged in the Y-shaped sealing ring 18; at least one second sealing ring 171 is sleeved outside the sealing ring bracket 17; the outer end surface of the Y-shaped sealing ring 18 is provided with an elastic groove 181; the upper and lower ends of the elastic groove 181 on the outer side of the piston body 22 are respectively abutted against the inner wall of the cylinder 1 and the outer end surface of the piston body 22.

The technical scheme specifically illustrates a sealing structure of the front end of the air cylinder 1, and the sealing performance can be greatly improved through the design. Such a design is particularly important in the evacuation phase, which can further ensure the evacuation effect. In particular, the present technical solution designs a Y-shaped sealing ring 18, and the upper and lower sides of the elastic groove 181 of the Y-shaped sealing ring 18 are in a tendency to open outwards. When the upper and lower ends of the elastic groove 181 are respectively abutted against the inside of the cylinder 1 and the outer end face of the piston main body 22, since the elastic groove 181 itself is in a pressed state, the Y-shaped seal ring 18 has a power and a tendency to be expanded to the outside. Such a design may further increase the sealing effect.

Preferably, a guide sleeve 19 is arranged at the rear end of the inner side of the front end cover 16, and the firing pin 12 is slidably arranged in the guide sleeve 19; the rear end of the guide sleeve 19 is formed with a step portion 191, and the inner side of the front end cover 16 is formed with a limit hole 161 adapted to the step portion 191.

The present solution specifically illustrates a design that increases the operational stability of striker 12. The guide sleeve 19 is internally provided with a through hole, so that the movement track of the firing pin 12 can be corrected, and the energy loss is reduced. Meanwhile, the design of the step part 191 can better position the guide sleeve 19, and is convenient to install and position.

Preferably, the striker 12 includes at least a front needle 121 and a rear needle 122; the outer sides of the front needle 121 and the rear needle 122 are provided with gun nozzles 5, and the gun nozzles 5 are arranged at the front side of the front end cover 16; the front end step of the rear needle body 122 is limited at the front end of the inner hole of the seal ring bracket 17, and a storage hole for installing nails is formed in the front needle head 121.

The present embodiment specifically describes a design structure of the striker 12. The striker 12 is typically of unitary design and is relatively long. Not only are the processing requirements high, but also they are prone to damage and fracture under intense transient impacts. At least two-stage design can avoid the problems to the greatest extent. The gun nozzle 5 is designed to correct a motion trajectory for the striker 12. Ensuring that the angle of the striker 12 is facing forward when it strikes the staple. Meanwhile, the front end step of the rear needle 122 is limited at the front end of the inner hole of the seal ring bracket 17, so that the limit of the rear needle 122 can be better realized.

Preferably, the front end of the gun nozzle 5 is also connected with a gun head 6, and the rear end of the gun head 6 is arranged at the inner side of the gun nozzle 5; the front end of the front needle head is slidably arranged at the gun head, and the rear end of the front needle head is formed with an abutting end for limiting. The technical scheme specifically introduces a front end design idea of the nailing gun. Such a design is simple and clear, is structurally stable, and is the preferred structural design. Meanwhile, the design can realize rapid and accurate punching by means of the gun head 6 when the front section of the front needle is punched, and meanwhile, the rear section can also realize braking by means of the abutting end abutting on the rear end face of the gun head 6, so that the front needle is prevented from punching out of the gun head 6 due to inertia. Meanwhile, in actual use, when nailing is carried out again, the nail is only needed to be plugged into the gun head 6, and the gun head 6 and the gun nozzle 5 are not needed to be installed again, so that the working efficiency is improved, and the loss is reduced.

Preferably, the inner side of the rear end of the front end cover 16 is sequentially provided with a buffer block 7 and a buffer sealing sleeve 8 from inside to outside, the outer side of the buffer sealing sleeve 8 is sleeved with a third sealing ring 81, and the third sealing ring 81 abuts against the inner side of the cylinder 1. The technical scheme specifically introduces a form of the sealing ring, and the sealing effect can be more comprehensively improved through the design. Meanwhile, due to the design of the buffer block 7, the impact of the piston main body 22 on the buffer block 7 can be reduced, and vibration and recoil are reduced.

Preferably, a seal mounting groove 82 is formed on the rear side of the front end surface of the buffer seal sleeve 8, a fourth seal ring 83 is mounted in the seal mounting groove 82, and the front end of the fourth seal ring 83 abuts against the inner side of the front end cover 16; the outer edge of the rear end of the buffer sealing sleeve 8 is provided with a step-shaped sealing part 84, and the rear side of the sealing part 84 is abutted against the front end surface of the cylinder 1; the front end of the impact head 21 is formed with a force receiving portion 24, and the outer diameter of the force receiving portion 24 is larger than the outer diameter of the guide sleeve 19.

The technical scheme specifically introduces a sealing design by utilizing the buffer sealing sleeve 8, and in order to solve the sealing problem between the cylinder 1 and the front end cover 16, the design can be used for increasing the tightness between the cylinder 1 and the front end cover 16 by using parts with sealing functions at the front end and the upper end. The design has simple structure and good sealing performance, and is a preferable structural design.

Preferably, the rear side of the buffer block 7 is formed with a conical flare 71, and the front end of the piston assembly 2 is formed with a piston front post 25 adapted to the conical flare 71. The technical scheme specifically describes a design structure of the buffer block 7, and the fit between the conical horn mouth 71 and the piston front column 25 can be increased by the fit design of the conical horn mouth and the piston front column, so that the integrity of the device is improved.

23 preferably, a push rod sleeve 9 is disposed at the rear end of the cylinder 1, the rear end of the driving device 3 is sleeved in the push rod sleeve 9, a movable plug 91 is connected to the rear end of the driving device 3, a rear end limiting plug 92 is disposed at the rear end of the movable plug 91, and a return spring 93 is abutted between the rear end limiting plug 92 and the movable plug 91.

The technical scheme specifically discloses a design idea of the push rod sleeve 9. The push rod sleeve 9 can be used to increase the effective length of the work while being convenient to hold. Meanwhile, the reset spring 93 between the inner movable plug 91 and the limiting plug can enable the rack pull rod 31 to be reset by utilizing the elastic force of the reset spring 93 under the condition that the clamping pawl 33 is rotated. Such a design is straightforward and is the preferred structural design.

Preferably, the push rod sleeve 9 may be fixedly connected by a screw connection with the firing holder 38 or the rear end cap 13. The mode is simple and convenient to install, and is preferably designed in a structure.

In the second embodiment, as shown in fig. 5 and 8, the difference between this embodiment and the first embodiment is that "a mounting hole 331 is formed on one side of the positioning pawl 33", a limiting pressing piece 35 is disposed at the upper end of the mounting seat 34, and an extension spring 36 "is disposed between the limiting pressing piece 35 and the mounting hole 331, and this part of the technical solution may be replaced by" a reset torsion spring 332 is abutted between the mounting seat 34 and the positioning pawl 33 ". That is, a reset torsion spring may be disposed at the front end of the detent pawl 33, so that a force is always applied to urge the detent pawl 33 against the rack bar 31. So that the sliding process of the rack bar 31 is smoother and more labor-saving.

The third embodiment is basically identical to the first embodiment in that the rear limit pin 37 also has a signal to move the rack bar 31 to the set position. Specifically, the tooth surface height of the rack bar 31 should be designed from the front end to the rear end "from high to low". When the rack bar 31 moves to the set position, the distance between the lower end of the clamping pawl 33 and the rear limiting pin 37 is smaller and smaller along with the lifting of the tooth surface, when the rack bar 31 is propped against the tooth surface, the rack bar 31 cannot move, the external hand-operated wheel cannot shake any more, and the fact that the rack bar 31 is in place can enter the firing step is indicated.

Such a design has a prompting and limiting effect. Can tell the user when to stop. In this embodiment, "from high to low" does not indicate a linear change, but may be one of the teeth on the rack bar 31, and its tooth surface is higher than the other tooth surface, and when travelling to the tooth, the detent pawl 33 is forced to abut against the rear end limiting pin 37, so as to implement the limitation of the rack bar.

The fourth embodiment is basically identical to the first embodiment, as shown in fig. 1-3, except that a dust cover 10 is further disposed at the front end of the gun head 6. The dust cap 10 is outwardly open in shape and is designed to reduce the effect of dust or other impurities on the device.

The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.

Claims

1. The cement nail gun is characterized by comprising a cylinder (1), wherein a piston assembly (2) is slidably arranged in the cylinder (1), and the piston assembly (2) is used for discharging air at the rear end of the piston assembly (2) in the moving process and compressing a cavity (11) at the front end Cheng Zhen of the piston assembly (2); the front end of the cylinder (1) is provided with an impact head (21), and the front end of the impact head (21) is provided with a firing pin (12); the rear end of the piston assembly (2) is connected with a driving device (3), and the driving device (3) is used for driving the piston assembly (2) to move in the air cylinder (1) and firing the firing pin (12) to move;

the piston assembly (2) comprises a piston body (22), and the impact head (21) is arranged in the piston body (22);

the front end of the air cylinder (1) is provided with a front end cover (16), and the firing pin (12) is arranged in the front end cover (16) through a sealing structure;

the front side of the front end cover (16) is provided with a gun nozzle (5), and the firing pin (12) is movably arranged in the gun nozzle (5).

2. The cement nail gun of claim 1, wherein: the driving device (3) comprises a rack pull rod (31), a driving gear (32) is arranged on the outer side of the air cylinder (1), and the driving gear (32) is matched and meshed with the rack pull rod (31).

3. The cement nail gun of claim 2, wherein: one end of the driving gear (32) is provided with a sleeved post (321), a hand crank (322) is sleeved outside the sleeved post (321), and the hand crank (322) is used for driving the driving gear (32) to rotate;

one side of the driving gear (32) is rotatably provided with a clamping pawl (33), and the clamping pawl (33) is matched with the rack pull rod (31).

4. A cement nail gun according to claim 3, wherein: mounting seats (34) are respectively arranged on two sides of the rack pull rod (31), and the clamping pawl (33) and the driving gear (32) are rotatably arranged between the two mounting seats (34);

the rear side of the clamping pawl (33) is provided with a mounting hole (331), the upper side of the rear end of the mounting seat (34) is fixedly provided with a limiting pressing sheet (35), and an extension spring (36) is arranged between the limiting pressing sheet (35) and the mounting hole (331); a rear limiting pin (37) is further arranged between the two mounting seats (34), and the rear limiting pin (37) is located at the rear side of the clamping pawl (33).

5. The cement nail gun of claim 1, wherein: a limit part (211) is formed at the rear end of the impact head (21); the piston assembly (2) further comprises a lock catch assembly (4) arranged on the outer side of the rear end of the impact head (21), and the lock catch assembly (4) is matched with the limiting part (211) to connect and release the impact head (21).

6. The cement nail gun of claim 5, wherein: the lock catch assembly (4) at least comprises a locking pawl (41), and the locking pawl (41) is abutted in the limiting part (211); the piston assembly (2) further comprises locking brackets (42) arranged on two sides of the locking pawl (41), and the locking pawl (41) is connected with the driving device (3) through the locking brackets (42); a front limiting pin (43) is arranged on the inner side of the locking bracket (42), a limiting surface (411) is formed on one side of the locking pawl (41), and the front limiting pin (43) is positioned at the rear end of the limiting surface (411) and used for limiting the rotation angle of the locking pawl (41);

a connecting column (421) is formed at the rear end of the locking bracket (42), and one end of the driving device (3) is fixedly arranged in the connecting column (421);

a locking short column (412) is formed at the lower end part of the locking pawl (41), and an inclined surface (413) of the locking short column (412) is propped against an inclined surface (213) of the limiting part (211) for realizing locking and locking;

the limiting part (211) is a ring groove; the number of the lock catch assemblies (4) is at least two, and the lock catch assemblies are uniformly distributed in the annular groove.

7. The cement nail gun of claim 6, wherein: the piston assembly (2) further comprises a guide disc (23); the outer edge of the guide disc (23) is formed with a sealing groove (231), and a first sealing ring (232) is arranged in the sealing groove (231);

two sides of the front end of the guide disc (23) are respectively provided with a connecting lug (233), and the rear end of the locking bracket (42) is arranged between the two connecting lugs (233) and is fixedly connected with the connecting lugs (233);

the outer side of the driving device (3) is provided with a firing fixing seat (38), the firing fixing seat (38) and the mounting seat (34) are coaxially arranged, and the firing fixing seat (38) is arranged at the outer side of the mounting seat (34); the outer side of the firing fixing seat (38) is fixedly provided with a plurality of firing ejector rods (39), and the firing ejector rods (39) are in one-to-one correspondence with the locking pawls (41); the rear end of the air cylinder (1) is provided with a rear end cover (13), and a second spring (14) is abutted between the rear end cover (13) and the firing fixing seat (38); a first spring (15) is arranged between the guide disc (23) and the locking pawl (41); a plurality of vent holes (234) are formed in the guide disc (23);

the rear end cover (13) is provided with a plurality of ventilation holes (131) in a rear side, and the firing ejector rod (39) is arranged in the ventilation holes (131) in a penetrating mode.

8. The cement nail gun of claim 1, wherein: the inner side of the front end cover (16) is provided with a sealing ring bracket (17), the outer side of the sealing ring bracket (17) and/or the piston main body (22) is provided with a Y-shaped sealing ring (18), and the firing pin (12) is slidably arranged in the Y-shaped sealing ring (18); at least one second sealing ring (171) is sleeved on the outer side of the sealing ring bracket (17); an elastic groove (181) is formed on the outer end face of the Y-shaped sealing ring (18), and the upper end and the lower end of the elastic groove (181) respectively lean against the inside of the cylinder (1) and the outer end face of the piston main body (22);

the rear end of the inner side of the front end cover (16) is provided with a guide sleeve (19), and the firing pin (12) is slidably arranged in the guide sleeve (19); the rear end of the guide sleeve (19) is provided with a step part (191), and the inner side of the front end cover (16) is provided with a limit hole (161) which is matched with the step part (191).

9. The cement nail gun of claim 1, wherein: the firing pin (12) at least comprises a front needle head (121) and a rear needle body (122); the outside of preceding syringe needle (121) and back needle (122) is provided with rifle mouth (5), back needle (122) front end step limit is located sealing washer support (17) hole front end, preceding syringe needle (121) internal shaping has the storage hole that is used for installing the nail.

10. The cement nail gun of claim 9, wherein: the front end of the gun nozzle (5) is also connected with a gun head (6), and the rear end of the gun head (6) is arranged at the inner side of the gun nozzle (5); the front end of the front needle head (121) is slidably arranged on the gun head (6), and an abutting end for limiting is formed at the rear end of the front needle head (121);

the inner side of the rear end of the front end cover (16) is sequentially provided with a buffer block (7) and a buffer sealing sleeve (8) from inside to outside, a third sealing ring (81) is sleeved on the outer side of the buffer sealing sleeve (8), and the third sealing ring (81) is abutted against the inner side of the cylinder (1);

a sealing installation groove (82) is formed in the rear side of the front end surface of the buffer sealing sleeve (8), a fourth sealing ring (83) is installed in the sealing installation groove (82), and the front end of the fourth sealing ring (83) is abutted against the inner side of the front end cover (16); the outer edge of the rear end of the buffer sealing sleeve (8) is provided with a step-shaped sealing part (84), and the rear side of the sealing part (84) is abutted against the front end surface of the cylinder (1); the front end of the impact head (21) is provided with a stress part (24);

a conical horn mouth (71) is formed at the rear side of the buffer block (7), and a piston front column (25) matched with the conical horn mouth (71) is formed at the front end of the piston assembly (2);

the rear end of the air cylinder (1) is provided with a push rod sleeve (9), the rear end of the driving device (3) is sleeved in the push rod sleeve (9), the rear end of the driving device (3) is connected with a movable plug (91), the rear end of the movable plug (91) is provided with a rear end limiting screw plug (92), and a return spring (93) is abutted between the rear end limiting screw plug (92) and the movable plug (91).