Percussion device provided with double-cylinder structure and fastener applying percussion device

Abstract

The percussion device comprises a middle cylinder front sleeve, a firing pin, a middle cylinder and an outer cylinder, one end of the outer cylinder is connected with the middle cylinder front sleeve, a first piston is arranged at one end of the middle cylinder, a rack is arranged on the outer wall of the middle cylinder, teeth are arranged on the rack at intervals, a through groove for the rack to penetrate out is formed in the middle cylinder front sleeve, and the middle cylinder front sleeve is connected with the firing pin. A gear is arranged on the middle cylinder front sleeve, the gear is connected with the teeth in a meshed mode, the first piston is driven to move back and forth along the inner wall of the outer cylinder, a locking assembly is arranged between the middle cylinder and the firing pin, an elastic stirring assembly for adjusting the locking assembly is arranged at the end, away from the first piston, of the middle cylinder, and a limiting groove for driving the elastic stirring assembly is formed in the middle cylinder front sleeve. And the firing pin is unlocked and fired firstly, and then the middle cylinder returns to be locked with the firing pin. The invention further discloses a fastener provided with the firing device. Through the design of the double cylinders, the locking assembly and the elastic shifting assembly, the firing force of the firing pin can be improved, the abrasion of the firing pin is reduced, and the energy consumption of the motor is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of fasteners, in particular to a firing device with a double-cylinder structure and a fastener using the same. Background Art

[0002] Nail fasteners are commonly used tools in the construction, decoration and other industries. They can instantly drive nails into the base. Compared with traditional expansion bolts, using nail fasteners to drive nails, steel nails and other nails has the advantages of low labor intensity, safety and reliability, high construction efficiency, comprehensive cost savings, less dust and no damage to the foundation.

[0003] In existing nail fasteners, the striking unit consists of a firing pin and a piston. The firing pin is mounted within the piston, and the piston is typically driven by a rack and pinion transmission. Specifically, a rack is mounted on the firing pin, and a pinion is mounted within the lifting unit. A drive motor in the lifting unit rotates the pinion. The meshing of the rack and pinion causes the rack to move laterally during rotation, compressing the gas and storing energy. Once the gas is compressed and stored, the firing pin remains locked, with the locking element engaged. When the nail gun is ready to drive a nail, the locking element is released from the firing pin, and the high-pressure gas pressure pushes the firing pin, causing it to strike the fastener, driving it into the desired object.

[0004] In the above structure, since the piston is subjected to high-pressure gas, the locking piece is subjected to greater pressure when it is disengaged from the striker, which easily wears the locking piece and the striker, thereby reducing the locking stability between the two. Moreover, setting the rack directly on the striker will also destroy the performance stability of the striker itself during frequent use, thereby reducing the impact effect. Summary of the Invention

[0005] The purpose of the present invention is to provide a firing device with a double-cylinder structure to solve the problem in the prior art that the rack is directly set on the firing pin, the firing pin is prone to wear, the strength and stability of the firing pin are easily destroyed, the firing force of the firing pin is reduced, and the fastening force is reduced.

[0006] To achieve the above object, the present invention provides the following technical solutions: The cam is provided with a first piston which is connected to the first piston rod and a second piston rod of the first piston rod is provided on the first piston rod side.

[0007] Preferably, the above-mentioned locking assembly includes a tapered sleeve, an inner sleeve and a sealing sleeve. The tapered sleeve is sleeved in the middle cylinder, and the tapered sleeve protrudes from the middle cylinder to form a card platform. One end of the sealing sleeve is clamped on the inner wall of the middle cylinder, and the other end is injected from the large mouth end of the tapered sleeve for connection. The inner sleeve is sleeved between the outer wall of the striker and the inner wall of the tapered sleeve through three steel balls, and the inner sleeve protrudes from the tapered sleeve to form a touch end. The striker is provided with a circle of grooves for locking the three steel balls. The card platform and the touch end are assembled with the elastic toggle assembly.

[0008] Preferably, the above-mentioned elastic locking assembly includes an L-shaped fixed block and a rotating block, one end of the L-shaped fixed block is connected to the middle cylinder and is located above the card table, the rotating block is elastically rotatably connected to the L-shaped fixed block, and one end of the rotating block is used to resist the limit groove, and the other end elastically resists the touch end.

[0009] Preferably, the protrusion on the above-mentioned middle cylinder is formed with a guide rail, and the guide rail is symmetrical with the rack, the L-shaped fixing block is connected to the guide rail, and a guide groove for moving the guide rail is provided on the front sleeve of the middle cylinder, and the guide groove is symmetrical with the through groove, and the limit groove is provided in the guide groove.

[0010] Preferably, the striker is further provided with a second limiting sleeve, and the second limiting sleeve is connected to the second piston, and both the first piston and the second piston are provided with at least one sealing ring.

[0011] Preferably, the tapered sleeve and the middle cylinder, the tapered sleeve and the sealing sleeve, and the front sleeve of the middle cylinder and the outer cylinder are all connected by threads.

[0012] As preferred, the through groove of the middle cylinder front sleeve is extended to form a mounting seat, the gear is connected to the mounting seat through a rotating shaft, the threaded section of the middle cylinder front sleeve is provided with a connecting seat, the first limiting sleeve is connected to the connecting seat, and the connecting seat is correspondingly provided with a positioning gap for the rack and the guide rail to pass through.

[0013] A fastener comprises a firing device, a nail guiding device and a hand-held shell, the front end of the middle cylinder front sleeve is provided with a working head, the nail guiding device is arranged on one side of the working head so that the nail on the nail guiding device enters the working head, the hand-held shell is provided with a power mechanism and a button for starting the power mechanism, the power mechanism is connected with the gear, the firing device is driven to work by the power mechanism, and the nail entering the working head is shot onto an object to be fastened by the striker of the firing device.

[0014] Compared with the prior art, the fastener has the beneficial effects that: (1) The firing device is simple in structure, the rack is arranged on the middle cylinder through double-cylinder design and a locking assembly, the middle cylinder drives the striker to compress gas in the outer cylinder for energy storage, compared with the striker directly compressing gas in the cylinder, the compression area is enlarged, the compression process is more relaxed, the energy consumption of the motor can be reduced, the wear of the striker can be reduced, and the service life of the product is prolonged. (2) The striker can be locked in the middle cylinder and stably and synchronously moved through the locking assembly, when moving to the set position, the striker is unlocked and fired through cooperation of the elastic pushing assembly and the limiting groove, the compressed energy is first applied to the pushing of the striker, the small-area impact force can increase the impact force of the striker, the firing force is improved, the fastening force is enhanced, the efficient firing force and the service life of the whole product are improved. (3) The fastener can obviously improve the firing force of the striker, improve the fastening effect of the product, reduce the wear of the striker and other accessories, and improve the use stability and the service life of the product. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the present application; Figure 2 It is a sectional structural schematic view of Figure 1 Figure 3 It is a split structural schematic view of the striker, the middle cylinder, the locking assembly and the elastic pushing assembly in the present application; Figure 4 It is a structural schematic view of the middle cylinder front sleeve in the present application.

[0016] ​In the figure: 1-front sleeve of the middle cylinder; 2-striker; 3-middle cylinder; 4-outer cylinder; 5-first piston; 6-rack; 7-teeth; 8-gear; 9-first limiting sleeve; 10-second piston; 11-tapered sleeve; 12-inner sleeve; 13-sealing sleeve; 14-steel ball; 15-L-shaped fixing block; 16-rotating block; 17-second limiting sleeve; 18-rotating shaft; 101-through groove; 102-limiting groove; 103-guide groove; 104-mounting seat; 105-connecting seat; 106-positioning notch; 201-groove; 301-guide rail; 1101-card table; 1201-touch end. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] like Figures 1-4 As shown, a firing device with a double-cylinder structure is provided, including a middle cylinder front sleeve 1, a firing pin 2, a middle cylinder 3 and an outer cylinder 4, one end of the outer cylinder 4 is connected to the middle cylinder front sleeve 1, a first piston 5 is provided at one end of the middle cylinder 3, a rack 6 is provided on the outer wall, and teeth 7 are provided at intervals on the rack 6, a through groove 101 for the rack 6 to pass through is provided on the middle cylinder front sleeve 1, a gear 8 is provided on the middle cylinder front sleeve 1, and the gear 8 is meshed with the teeth 7 to drive the first piston 5 to reciprocate along the inner wall of the outer cylinder 4, and the middle cylinder front sleeve 1 is connected to the outer cylinder 4. A first limiting sleeve 9 is provided in the connected end portion to block the movement of the first piston 5, a locking assembly is provided between the middle cylinder 3 and the striker 2, and an elastic toggle assembly for adjusting the locking assembly is also provided at the end of the middle cylinder 3 away from the first piston 5, and a limiting groove 102 for driving the elastic toggle assembly is provided on the front sleeve 1 of the middle cylinder, prompting the striker 2 to unlock and fire first and then return the middle cylinder 3 to lock with the striker 2. A second piston 10 is provided at one end of the striker 2, and the second piston 10 penetrates the middle cylinder 3 and is embedded in the first piston 5 or moves along the inner wall of the middle cylinder 3.

[0019] First, gas is introduced into the outer cylinder 4 to create a pre-pressure. Typically, an inflator is provided at the end of the outer cylinder 4 away from the front sleeve 1 of the middle cylinder. The inflator serves two purposes: first, to facilitate initial charging of the outer cylinder 4 with high-pressure inert gas or high-pressure air; and second, to facilitate repeated charging of the high-pressure inert gas or high-pressure air to compensate for leakage of the high-pressure inert gas or high-pressure air in the outer cylinder 4 after the fastener has been operating for a period of time. The inflator can utilize existing mature technology, such as a device for inflating automobile tires. Although not illustrated in this embodiment, this should not be construed as limiting the present invention.

[0020] When not working, the striker 2 is connected to the middle cylinder 3 through the locking assembly, the second piston 10 is extruded in the first piston 5, at this time, the middle cylinder 3 is located in the middle cylinder front sleeve 1, the second piston 10 is clamped on the first limiting sleeve 9, and is limited at the cylinder port position close to the outer cylinder 4.

[0021] When working, through the power mechanism on the fastener, the gear 8 is driven to mesh and drive the rack to rotate, thereby driving the middle cylinder 3 and the striker 2 to move into the outer cylinder 4 together, and the compressed gas in the outer cylinder 4 is stored, the movement of the middle cylinder 3 drives the elastic driving assembly to move together, and when the elastic driving assembly is blocked by the limiting groove 102, the elastic driving assembly works on the locking assembly, and the striker 2 is unlocked to be fired to impact the nail, at the above-mentioned unlocking position, there is still a gap between the first piston 5 and the bottom of the outer cylinder 4, and there is still a gap between the first piston 5 and the bottom of the outer cylinder 4 during the firing process of the striker 2, the gear 8 continues to rotate to drive the middle cylinder 3 to continue to compress, when the gear 8 rotates to the neutral position (the part without setting the teeth), the gear 8 is separated from the gear teeth 7 on the middle cylinder 3, under the action of the high-pressure gas in the outer cylinder 4, the middle cylinder 3 is fired to the gun head direction until the striker 2 is locked, and the return operation is completed, and the reciprocating work is carried out.

[0022] It should be noted that the structure of the plurality of teeth on the gear 8 and the gear teeth 7 are cooperatively designed, for example, the number of the gear teeth 7, the spacing between the gear teeth 7, and the gear 8 is also provided with a neutral position, that is, a part without setting the tooth structure, which is similar to the existing design that the gear directly matches with the rack on the striker, and details are not repeated here.

[0023] The firing device of the present application has the advantages that the structure is simple, through the double-cylinder design and the locking assembly, and the rack 6 is arranged on the middle cylinder 3, the middle cylinder 3 drives the striker 2 to compress the gas in the outer cylinder 4 for energy storage, compared with the striker 2 directly compressing the gas in the cylinder, the compression area is expanded, the compression process is more relaxed, that is, the energy consumption of the motor can be reduced, the wear of the striker 2 can be reduced, and the service life of the product is improved; through the locking assembly, the striker 2 can be locked in the middle cylinder 3 and stably moved synchronously, when moving to the set position, the striker 2 is unlocked and fired through the cooperation of the elastic driving assembly and the limiting groove, the compressed energy acts on the pushing of the striker 2, the small-area impact force can increase the impact force of the striker 2, improve the firing force, enhance the fastening force, and improve the efficient firing force and service life of the whole product.

[0024] Specifically, the locking assembly comprises a conical sleeve 11, an inner sleeve 12 and a sealing sleeve 13, the conical sleeve 11 is sleeved in the middle cylinder 3, and the conical sleeve 11 protrudes from the middle cylinder 3 to form a clamping table 1101, one end of the sealing sleeve 13 is clamped on the inner wall of the middle cylinder 3, and the other end is connected from the large opening end of the conical sleeve 11, the inner sleeve 12 is sleeved between the outer wall of the striker 2 and the inner wall of the conical sleeve 11 through three steel balls 14, and the inner sleeve 12 protrudes from the conical sleeve 11 to form a triggering end 1201, a groove 201 for locking the three steel balls 14 is arranged on the striker 2, the clamping table 1101 and the triggering end 1201 are matched with the elastic pushing assembly, the elastic locking assembly comprises an L-shaped fixed block 15 and a rotating block 16, one end of the L-shaped fixed block 15 is connected to the middle cylinder 3 and located above the clamping table 1101, the rotating block 16 is elastically connected to the L-shaped fixed block 15, and one end of the rotating block 16 is used for abutting against the limiting groove 102, and the other end elastically abuts against the triggering end 1201.

[0025] The above design, when the striker 2 is shot into the narrow opening part of the conical sleeve 11, the striker 2 is shot into the three steel balls 14 to extrude outward, at this time, the inner sleeve 12 moves in the same direction as the striker 2, that is, the inner sleeve 12 moves to the wide opening direction of the conical sleeve 11, when the striker 2 moves to the state that the steel balls 14 are embedded in the groove 201, the locking of the striker 2 is completed, when a nail needs to be shot, the middle cylinder 3 is driven by the gear 8 to move into the outer cylinder 4, when the one end of the rotating block 16 is blocked by the limiting groove 102, the continuous movement of the L-shaped fixed block 15 will cause the other end of the rotating block 16 to elastically extrude the triggering end 1201, so that the inner sleeve 12 moves to the wide opening part of the conical sleeve 11, so that the three steel balls 14 also move outward from the inner wall of the conical sleeve 12 to separate from the groove 201, and the unlocking of the striker 2 is completed, and due to the high-pressure gas formed between the first piston 5 and the outer cylinder 4, the striker 2 is efficiently fired. The whole process is simple in operation, stable in locking state, uses high pressure to fire the striker with small contact area first, has strong firing force, and can improve the fastening effect.

[0026] Specifically, the middle cylinder 3 protrudes to form a guide rail 301, and the guide rail 301 is symmetrical with the rack 6, the L-shaped fixed block 15 is connected to the guide rail 301, the middle cylinder front sleeve 1 is provided with a guide groove 103 for the movement of the guide rail 301, and the guide groove 103 is symmetrical with the through groove 101, and the limiting groove 102 is arranged in the guide groove 103. The above design can make the movement of the middle cylinder 3 more stable and effective, make the gas compression effect better, and make the firing force of the striker 2 stronger.

[0027] Specifically, the second limiting sleeve 17 is further sleeved on the firing pin 2, and the second limiting sleeve 17 is connected with the second piston 10. At least one sealing ring is sleeved on the first piston and the second piston 10. The above design can make the firing pin 2 stable at the corresponding position after firing, prevent the firing pin 2 from firing excessively, improve the working effect, and improve the gas compression effect through the design of the sealing ring, thereby improving the firing force of the firing pin 2.

[0028] Specifically, the conical sleeve 11 is connected with the middle cylinder 2, the conical sleeve 11 is connected with the sealing sleeve 13, and the middle cylinder front sleeve 1 is connected with the outer cylinder 4 through threads. The above design facilitates disassembly and replacement between the parts, improves the use flexibility and service life of the overall product.

[0029] Specifically, the mounting seat 104 is formed at the through groove 101 of the middle cylinder front sleeve 1, the gear 8 is connected to the mounting seat 104 through the rotating shaft 18, the connecting seat 105 is arranged at the threaded section of the middle cylinder front sleeve 1, the first limiting sleeve 9 is connected to the connecting seat 105, and the positioning gap 106 for the rack 6 and the guide rail 301 to pass through is correspondingly arranged on the connecting seat 105. The above design has a compact structure, can make the meshing work of the gear 8 and the gear teeth 7 more stable and smooth, and thereby improve the gas compression effect and the firing effect of the firing pin 2.

[0030] A fastener includes a firing device, a guide nail device and a handheld shell. The front end of the middle cylinder front sleeve is provided with a working head. The guide nail device is arranged on one side of the working head, so that the nail on the guide nail device enters the working head. The handheld shell is provided with a power mechanism and a button for starting the power mechanism. The power mechanism is connected with the gear 8 and drives the firing device to work. The nail entering the working head is shot onto the object to be fastened by the firing pin 2 of the firing device.

[0031] The working head, the guide nail device, the handheld shell and the power mechanism, the control button and the like in the handheld shell in the above fastener can adopt the structures in the existing design, which will not be described here. The present application mainly improves the impact link. The firing device of the present application can obviously improve the firing force of the firing pin 2, improve the fastening effect of the product, reduce the wear of the firing pin 2 and the like, and improve the use stability and service life of the product.

[0032] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A firing device with a double-cylinder structure is provided, characterized in that: The cam is provided with a first piston which is adapted to move the first gear and the second gear to move along the cam inner wall, and a gear is provided on the first piston rod to engage with the first gear and engage with the gear to engage with the gear.

2. The firing device with a double-cylinder structure according to claim 1, characterized in that: The locking assembly includes a tapered sleeve, an inner sleeve and a sealing sleeve. The tapered sleeve is sleeved in the middle cylinder, and the tapered sleeve protrudes from the middle cylinder to form a card platform. One end of the sealing sleeve is clamped on the inner wall of the middle cylinder, and the other end is injected from the large mouth end of the tapered sleeve for connection. The inner sleeve is sleeved between the outer wall of the striker and the inner wall of the tapered sleeve through three steel balls, and the inner sleeve protrudes from the tapered sleeve to form a touch end. The striker is provided with a circle of grooves for locking the three steel balls. The card platform and the touch end are assembled with the elastic toggle assembly.

3. The firing device with a double-cylinder structure according to claim 1, characterized in that: The elastic locking assembly includes an L-shaped fixed block and a rotating block. One end of the L-shaped fixed block is connected to the middle cylinder and is located above the card table. The rotating block is elastically rotatably connected to the L-shaped fixed block, and one end of the rotating block is used to resist the limiting groove, and the other end elastically resists the touch end.

4. The firing device with a double-cylinder structure according to claim 3, characterized in that: A guide rail is formed on the protrusion of the middle cylinder, and the guide rail is symmetrical with the rack. The L-shaped fixing block is connected to the guide rail. A guide groove for moving the guide rail is provided on the front sleeve of the middle cylinder, and the guide groove is symmetrical with the through groove. The limit groove is provided in the guide groove.

5. The firing device with a double-cylinder structure according to claim 4, characterized in that: The striker is also sleeved with a second limiting sleeve, and the second limiting sleeve is connected to the second piston. The first piston and the second piston are both sleeved with at least one sealing ring.

6. The firing device with a double-cylinder structure according to claim 5, characterized in that: The tapered sleeve and the middle cylinder, the tapered sleeve and the sealing sleeve, and the front sleeve of the middle cylinder and the outer cylinder are all connected through threads.

7. The firing device with a double-cylinder structure according to claim 6, characterized in that: A mounting seat is formed by extending from the through groove of the front sleeve of the middle cylinder, and the gear is connected to the mounting seat through a rotating shaft. A connecting seat is provided at the threaded section of the front sleeve of the middle cylinder, and the first limiting sleeve is connected to the connecting seat, and a positioning notch for the rack and guide rail to pass through is correspondingly provided on the connecting seat.

8. A fastener, characterized in that: The invention comprises a firing device as described in any one of claims 1 to 7, a nail guide device and a handheld shell, a working head being provided at the front end of the front sleeve of the middle cylinder, the nail guide device being provided on one side of the working head so that the nail on the nail guide device enters the working head, a power mechanism and a button for starting the power mechanism being provided on the handheld shell, and the power mechanism being connected to the gear, the firing device is driven to work by the power mechanism, and then the nail entering the working head is shot into the object to be fastened by the firing pin of the firing device.

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