WO2024131724A1 - 一种气动钉枪 - Google Patents
一种气动钉枪 Download PDFInfo
- Publication number
- WO2024131724A1 WO2024131724A1 PCT/CN2023/139506 CN2023139506W WO2024131724A1 WO 2024131724 A1 WO2024131724 A1 WO 2024131724A1 CN 2023139506 W CN2023139506 W CN 2023139506W WO 2024131724 A1 WO2024131724 A1 WO 2024131724A1
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- WO
- WIPO (PCT)
- Prior art keywords
- piston
- cylinder
- initial position
- hole
- groove
- Prior art date
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- 238000007789 sealing Methods 0.000 claims description 31
- 230000035939 shock Effects 0.000 claims description 14
- 238000009423 ventilation Methods 0.000 claims description 14
- 238000010304 firing Methods 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 239000004519 grease Substances 0.000 claims description 5
- 230000013011 mating Effects 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- 101001121408 Homo sapiens L-amino-acid oxidase Proteins 0.000 description 1
- 101000827703 Homo sapiens Polyphosphoinositide phosphatase Proteins 0.000 description 1
- 102100026388 L-amino-acid oxidase Human genes 0.000 description 1
- 102100023591 Polyphosphoinositide phosphatase Human genes 0.000 description 1
- 101100012902 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) FIG2 gene Proteins 0.000 description 1
- 101100233916 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) KAR5 gene Proteins 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000001338 self-assembly Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
- B25C1/00—Hand-held nailing tools; Nail feeding devices
- B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
Definitions
- the present invention relates to the technical field of electric tools, and in particular to a pneumatic nail gun.
- a nail gun is a handheld nailing tool that drives nails into objects such as wood through a fast-moving striker.
- nail guns can be divided into electric nail guns, pneumatic nail guns, manual nail guns, etc.
- Existing pneumatic nail guns generally adopt a double-cylinder structure. After the large piston in the large cylinder moves to compress the air in the large cylinder to a certain extent, the piston in the small cylinder is released, and the compressed air in the large cylinder flows into the small cylinder through the air flow channel and pushes the small piston in the small cylinder to move quickly.
- the fast-moving small piston drives the striker to move synchronously, and the fast-moving striker drives the nail into objects such as wood to achieve the purpose of nailing.
- the structure of the air flow channel for compressed air to flow from the large cylinder into the small cylinder is relatively complex, and the air tightness requirements of related components are relatively high.
- the length of the compressed air flow path is relatively long, and the effective contact area of the compressed air acting on the small piston is relatively small, so that the initial force on the small piston is relatively small, and the initial movement speed of the small piston is also relatively small, resulting in a lower speed when the small piston drives the firing pin to nail, and the nailing depth is relatively shallow.
- the object to be driven into is relatively hard, the nail cannot be effectively driven into the object, which is not conducive to improving the user experience.
- the present invention provides a pneumatic nail gun, in which a vent hole is arranged on the cylinder barrel of the second cylinder.
- the compressed air in the first cylinder can flow directly into the first cylinder through the vent hole and act on the second piston, thereby effectively increasing the nailing depth and effectively driving the nails into harder objects, which is beneficial to improving the user experience.
- the present invention provides a pneumatic nail gun, including a body and a nail feeding device, wherein a cylinder assembly, a driving assembly and a locking assembly are arranged in the body, the cylinder assembly includes a first cylinder provided with a first piston, a second cylinder provided with a second piston, and a firing pin driven by the second piston, the first piston is driven by the driving assembly and has a ventilation position and a compression position, the second cylinder is arranged in the first cylinder and passes through the first piston, the second cylinder includes a cylinder barrel, the second piston is arranged in the cylinder barrel, the second piston and the firing pin have an initial position and a nailing position, the locking assembly limits the second piston to the initial position during the process of the first piston moving from the ventilation position to the compression position, the cylinder barrel is provided with a vent hole for connecting the inside of the first cylinder and the inside of the second cylinder, the vent hole is at least partially higher than the top surface of the second piston in the initial position, so
- the area of the vent hole above the top surface of the second piston in the initial position accounts for no less than 50%.
- vent holes are higher than the top surface of the second piston in the initial position.
- a plurality of the vent holes are spaced apart along the circumference of the cylinder; and/or the vent holes are at least one of a circular hole, a square hole, a rectangular hole, an elliptical hole, an arc hole, and a triangular hole.
- an axially positioned sealing ring is sleeved on the circumference of the second piston, and the vent hole is higher than the sealing ring in the initial position.
- a shock-absorbing pad is provided on the top surface of the second piston, and the shock-absorbing pad is provided with a groove structure for compressed air to flow.
- the outer diameter of the shock absorbing pad is smaller than the outer diameter of the second piston; and/or a part of the vent hole is higher than the top surface of the shock absorbing pad in the initial position.
- the groove structure includes a plurality of radial grooves spaced apart along the circumferential direction and a circumferential groove for connecting the radial grooves.
- the lock assembly includes a fixed seat arranged in the first cylinder, a lock sleeve arranged at the top of the cylinder and inserted into the fixed seat, a lock core arranged on the second piston and insertable into the lock sleeve, a slider slidably arranged on the fixed seat and capable of cooperating with the lock core to limit the second piston to an initial position, and the mating gap between the lock sleeve and the fixed seat is filled with sealing grease.
- the fixing seat is provided with a slide groove for installing a slider, the top side of the slide groove is open, the slider is arranged in the slide groove through a cover shell, and an elastic pad is provided between the top of the fixing seat and the top wall of the first cylinder;
- the fixing seat is provided with a slide groove for installing the slider and a groove cover for covering the slide groove, the top side of the slide groove is open, the slider is arranged in the slide groove through the cover, the groove cover covers the top side of the slide groove, and an elastic sealing rib is provided between the circumferential outer wall of the groove cover and the circumferential inner wall of the slide groove;
- the fixing seat is provided with a slide groove for installing the sliding block, the bottom side of the slide groove is open, the sliding block is arranged in the slide groove through a cover shell, and the cover shell is fixed together with the fixing seat.
- the present invention has the following advantages:
- the pneumatic nail gun provided by the present invention has an air vent connected to the inside of the two cylinders on the cylinder barrel of the second cylinder.
- the compressed air in the first cylinder can flow directly into the second cylinder through the air vent and act on the second piston, which reasonably increases the effective contact area when the compressed air acts on the second piston, so that the second piston can obtain a larger initial force, and the initial movement speed of the second piston driving the striker downward after being released by the lock assembly is increased, thereby increasing the movement speed of the second piston driving the striker when nailing, which is beneficial to increasing the nailing depth, and is also beneficial to driving nails into harder objects, which is beneficial to improving the user experience.
- the compressed air in the first cylinder can flow directly into the second cylinder through the air vent and act on the second piston, there is no need to set a channel structure on the lock assembly or other components for the compressed air to flow from the first cylinder into the second cylinder, which is beneficial to reducing the structural difficulty and air tightness requirements of related components.
- the second piston When the second piston is in the initial position, at least 50% of the vent area is higher than the top surface of the second piston, or the vent is completely higher than the top surface of the second piston, to ensure the amount of compressed air flowing into the second cylinder through the vent, so that the second piston and the firing pin can obtain a sufficient initial movement speed, which is beneficial to improve the nailing effect.
- a plurality of vent holes are arranged at intervals along the circumference of the cylinder barrel, so that the compressed air in the first cylinder can quickly flow into the second cylinder through the vent holes and act on the second piston, thereby increasing the movement speed of the second piston in driving the striker to move from the initial position to the nailing position, which is beneficial to improving the nailing effect.
- vent holes can be of a single shape or of several different shapes. Reasonable arrangement of the structural style of the vent holes can reduce the difficulty of processing the vent holes and help improve production efficiency.
- the vent hole is higher than the sealing ring on the second piston, so that the compressed air flowing into the second cylinder through the vent hole can effectively act on the second piston, avoiding the situation where the compressed air flowing into the second cylinder through the vent hole is directly discharged and cannot effectively act on the second piston, thereby improving the effect of compressed air on the second piston and helping to improve the nailing effect.
- a groove structure is set on the top surface of the shock-absorbing pad.
- the outer diameter of the shock-absorbing pad is smaller than the outer diameter of the second piston, so that the compressed air flowing into the second cylinder through the vent hole can directly and effectively act on the top surface of the second piston, ensuring the initial movement speed of the second piston and the striker.
- the vent hole is partially higher than the top surface of the shock-absorbing pad, so that the compressed air flowing into the second cylinder through the vent hole can flow quickly in the groove structure, which is conducive to improving the effect of the compressed air on the second piston.
- An elastic pad is arranged between the top of the fixed seat and the top wall of the first cylinder, and the top side of the fixed seat is airtightly sealed by the elastic pad.
- the slide slot is covered with a slot cover, and a sealing rib is arranged between the slot cover and the slide slot, and the top side of the slide slot is airtightly sealed by the sealing rib.
- the bottom side of the slide slot is open, and the cover and the fixed seat are fixed together, and grooving on the top of the fixed seat is avoided as much as possible.
- the installation structure of the slider and the sealing structure of the fixed seat are reasonably arranged to avoid the compressed air in the first cylinder from leaking from the self-assembly gap, resulting in a decrease in the air pressure of the compressed air in the first cylinder, which is conducive to ensuring the effect of the compressed air on the second piston.
- FIG1 is an overall view of a pneumatic nail gun according to an embodiment of the present invention.
- FIG2 is a diagram showing the internal structure of a pneumatic nail gun in the first embodiment
- FIG3 is a structural diagram of a cylinder assembly in a pneumatic nail gun in Example 1;
- FIG4 is a partial structural diagram of a cylinder assembly in a pneumatic nail gun in Example 1;
- FIG5 is a partial structural diagram of the second piston of the pneumatic nail gun in the first embodiment when it is in the initial position;
- FIG6 is a structural diagram of a second piston in a pneumatic nail gun in Example 1;
- Example 7 is a structural diagram of the cylinder barrel of the second cylinder in the pneumatic nail gun of Example 1;
- FIG. 8 is a diagram showing the matching structure of the cylinder barrel of the second cylinder and the elastic valve sleeve in the pneumatic nail gun of the first embodiment
- FIG. 9 is a diagram showing the matching structure of the second cylinder and the lock assembly in the pneumatic nail gun of the first embodiment
- FIG10 is an exploded view of a slider and a cover of a locking assembly in a pneumatic nail gun according to the first embodiment
- FIG. 11 is a structural diagram of a driving assembly in a pneumatic nail gun in accordance with an embodiment of the present invention.
- FIG. 12 is a partial structural diagram of the second pneumatic nail gun in the second embodiment when the second piston is in the initial position;
- FIG. 13 is a partial structural diagram of the locking assembly in the pneumatic nail gun of the third embodiment.
- 100-body, 200-nail feeding device 300-cylinder assembly, 310-first cylinder, 311-first piston, 312-cylinder shell, 313-cylinder seat, 314-first sealing ring, 315-pin rod, 316-first through hole, 320-second cylinder, 321-second piston, 322-cylinder barrel, 322a-closing part, 323-vent hole, 324-plug head, 325-second sealing ring, 326-avoidance hole, 327-second through hole, 330-striker, 340-shock pad, 341-radial groove, 342-circumferential groove, 350-rod body, 360-elastic valve sleeve, 400-driving assembly, 4 10-motor, 420-reducer, 421-output shaft, 430-crank, 440-connecting rod, 500-locking assembly, 510-fixed seat, 511-slide groove, 512-avoidance groove, 513-jack, 520-lock sleeve
- a pneumatic nail gun provided in Embodiment 1 of the present invention includes a body 100 and a nail feeding device 200.
- a cylinder assembly 300, a driving assembly 400 and a locking assembly 500 are arranged in the body 100.
- the cylinder assembly 300 includes a first cylinder 310 with a first piston 311, a second cylinder 320 with a second piston 321, and a firing pin 330 driven by the second piston 321.
- the first piston 311 is driven by the driving assembly 400 and has a ventilation position and a compression position.
- the second cylinder 320 is arranged in the first cylinder 310 and passes through the first piston 311.
- the second cylinder 320 includes a cylinder barrel 322.
- the second piston 321 is arranged in the cylinder barrel 322.
- the second piston 321 and the firing pin 330 have an initial position and a nailing position.
- the locking assembly 500 limits the second piston 321 to the initial position during the process of the first piston 311 moving from the ventilation position to the compression position.
- the cylinder barrel 322 is provided with a vent hole 323 for connecting the interior of the first cylinder 310 with the interior of the second cylinder 320. At least a portion of the vent hole 323 is higher than the top surface of the second piston 321 at the initial position, so that the compressed air in the first cylinder 310 flows into the second cylinder 320 through the vent hole 323 and acts as a
- the second piston 321 is used to drive the firing pin 330 to move from the initial position to the nailing position.
- the compressed air in the first cylinder 310 can flow directly into the second cylinder 320 through the air vent 323 and act on the second piston 321, thereby reasonably increasing the effective contact area when the compressed air acts on the second piston 321, so that the second piston 321 can obtain a larger initial force, and increase the initial movement speed of the second piston 321 to drive the striker 330 downward after being released by the locking assembly 500, thereby increasing the movement speed of the second piston 321 to drive the striker 330 from the initial position to the nailing position, which is beneficial to increasing the nailing depth, and is also beneficial to driving nails into harder objects, which is beneficial to improving the user experience.
- the first cylinder 310 includes a hollow cylinder shell 312 and a cylinder seat 313 disposed at the bottom end of the cylinder shell 312.
- a first sealing ring 314 for axial positioning is sleeved on the circumference of the first piston 311 through a groove.
- the first piston 311 can move up and down in the first cylinder 310 under the driving action of the driving assembly 400.
- the second cylinder 320 is eccentrically fixed on the cylinder seat 313.
- the second cylinder 320 also includes a plug 324 inserted at the bottom end of the cylinder barrel 322.
- the first piston 311 is provided with an eccentrically arranged through-hole that cooperates with the cylinder barrel 322.
- the cylinder barrel 322 of the second cylinder 320 passes through the first piston 311 from the through-hole, that is, the first piston 311 can move up and down relative to the second cylinder 320.
- An O-ring is provided on the inner wall of the through-hole to seal the first piston 311 with the cylinder barrel 322.
- a second sealing ring 325 for axial positioning is sleeved on the circumference of the second piston 321 through a groove, and the second sealing ring 325 realizes the sealing cooperation between the second piston 321 and the cylinder 322 in the circumferential direction.
- the vent hole 323 is higher than the second sealing ring 325 which is also in the initial position, so as to prevent the compressed air flowing into the second cylinder 320 through the vent hole 323 from being directly discharged and failing to effectively act on the second piston 321.
- the top of the cylinder 322 is provided with an integrally formed closing portion 322a, and the vent 323 is provided at the upper end of the cylinder 322 and is lower than the closing portion 322a.
- a plurality of vents 323 are provided at intervals along the circumference of the cylinder 322.
- the vent 323 is a circular hole, and the vent 323 is preferably distributed at equal intervals along the circumference of the cylinder 322.
- the vent 323 can also be set as a square hole, a rectangular hole, an elliptical hole, an arc hole, a triangular hole, or other reasonable holes.
- the vent 323 can also use several holes of different shapes at the same time, such as using any two or any three or any multiple of circular holes, square holes, rectangular holes, elliptical holes, arc holes, and triangular holes at the same time, and there is no excessive restriction on the shape of the hole.
- the vent holes 323 may also be distributed at non-equidistant intervals, that is, the central curvatures of two adjacent vent holes 323 are different.
- the vent hole 323 is preferably completely higher than the top surface of the second piston 321, and there is a height difference ⁇ h between the lowest point of the vent hole 323 and the top surface of the second piston 321, so that 100% of the area of the vent hole 323 is higher than the top surface of the second piston 321.
- ⁇ h can be set to a reasonable size such as 0.2mm, 0.5mm, 0.7mm, 1mm, 1.2mm, 1.5mm, 1.7mm, 2mm, etc.
- the lowest point of the vent hole 323 can also be set flush with the top surface of the second piston 321.
- the lowest point of the vent hole 323 can also be set slightly lower than the top surface of the second piston 321, so that the vent hole 323 is partially higher than the top surface of the second piston 321, and the area ratio of the vent hole 323 above the top surface of the second piston 321 can be set to a reasonable size such as 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 99%, etc.
- a shock absorbing pad 340 is provided on the top surface of the second piston 321, and the shock absorbing pad 340 is provided with a groove structure for compressed air to flow.
- the outer diameter of the shock absorbing pad 340 is preferably smaller than the outer diameter of the second piston 321, so that the compressed air flowing into the second cylinder 320 through the vent hole 323 can directly and effectively act on the top surface of the second piston 321.
- the groove structure includes a plurality of radial grooves 341 distributed at intervals along the circumference and a circumferential groove 342 for connecting the radial grooves 341, so that the compressed air flowing into the second cylinder 320 can act on the top surface of the second piston 321 evenly through the groove structure.
- the circumferential groove 342 can be an arc groove or an annular groove, and the circumferential groove 342 can be set at a reasonable number of two or three circles inside and outside according to the size of the shock absorbing pad 340.
- the groove structure can also be set to other reasonable structures.
- the vent hole 323 is partially higher than the top surface of the shock pad 340 which is also in the initial position, so that the local vent hole 323 below the top surface of the shock pad 340 is roughly at the same height as the groove structure, so that the compressed air flowing into the second cylinder 320 through the vent hole 323 can directly flow into the groove structure.
- the area ratio of the vent hole 323 above the top surface of the shock pad 340 can be set to a reasonable size such as 40%, 45%, 50%, 55%, 60%, etc.
- the lock assembly 500 includes a fixed seat 510, a lock sleeve 520, a lock core 530, a slider 540, a nut 550 and a locking spring 570.
- the fixed seat 510 is fixed to the top end of the first cylinder 310 and is located at the top of the second cylinder 320.
- An elastic pad 560 is provided between the fixed seat 510 and the top wall of the cylinder shell 312.
- An avoidance hole 326 for the lock sleeve 520 to pass through is formed on the closing portion 322a of the cylinder barrel 322.
- the cross-sectional shape of the lock sleeve 520 along the axial direction is roughly a hollow inverted T-shape.
- the plate-like portion of the lock sleeve 520 is located in the first cylinder 310 and is abutted against the closing portion 322a up and down.
- the columnar portion of the lock sleeve 520 passes through the fixed seat 510 and is locked to the top wall of the cylinder shell 312 by the nut 550.
- the top of the striker 330 is provided with a rod body 350, the top of the rod body 350 is inserted into the second piston 321, the lower end of the lock core 530 is inserted into the second piston 321 and is locked and fixed with the rod body 350 by screws, so that the lock core 530, the rod body 350 and the second piston 321 are fixed together, and the shock absorbing pad 340 is located at the outer periphery of the lock core 530.
- the upper part of the lock core 530 is provided with a circle of locking grooves 531 that cooperate with the slider 540, and the fixed seat 510 is provided with a sliding groove 511 extending along a certain radial direction.
- the slider 540 and the locking spring 570 are arranged in the sliding groove 511.
- the end of the slider 540 facing the lock core 530 is provided with a step portion 541 that cooperates with the locking groove 531 to limit the second piston 321 to the initial position
- the lock sleeve 520 is provided with a locking groove 531 for avoiding
- the notch 521 of the slider 540 and the locking spring 570 are in a compressed state, with one end in contact with the groove wall of the slide groove 511 and the other end in contact with the slider 540.
- the locking spring 570 pushes the slider 540 against the lock core 530 in a normal state so that the step portion 541 and the lock groove 531 are in a locked state.
- the top side of the slide groove 511 is open, the slider 540 and the lock core 530 are both metal parts, the fixing seat 510 is a plastic part, and the lock block 540 is arranged in the slide groove 511 through a metal cover 591.
- the fixing seat 510 is provided with a socket 513 for the columnar portion of the locking sleeve 520 to pass through, and the socket 513 is gap-matched with the columnar portion of the locking sleeve 520.
- sealing grease is filled in the matching gap between the locking sleeve 520 and the fixing seat 510, and the airtight seal between the locking sleeve 520 and the fixing seat 510 is achieved by the sealing grease, thereby preventing compressed air from leaking from the assembly gap between the locking sleeve 520 and the fixing seat 510, resulting in a weakening of the air pressure effect of the compressed air on the second piston.
- the fixing seat 510 is fixed to the top wall of the cylinder shell 312 by bolts, and the elastic pad 560 is clamped between the top surface of the fixing seat 510 and the top wall of the cylinder shell 312.
- the elastic pad 560 realizes the air sealing of the top side of the fixing seat 510, thereby preventing the compressed air in the first cylinder 310 from leaking from the assembly gap of the self-locking component, resulting in a decrease in the air pressure of the compressed air in the first cylinder, which is beneficial to ensure the effect of the compressed air on the second piston 321.
- the locking assembly 500 also includes a push rod 580 arranged on the first piston 311 for unlocking the locking assembly 500, and the push rod 580 is provided with a first inclined surface 581 on the side facing away from the axial center of the first piston 311, the sliding block 540 is provided with a through groove 542 for the push rod 580 to be inserted, and the through groove 542 is provided with a second inclined surface 543 parallel to the first inclined surface 581 on the side facing away from the axial center of the first piston 311, the fixing seat 510 is provided with an avoidance groove 512 for avoiding the push rod 580, and the cover shell 591 is provided with a groove for avoiding the push rod 580.
- the push rod 580 moves upward synchronously with the first piston 311 and passes through the avoidance groove 512 and is inserted into the through groove 542 of the slider 540.
- the first inclined surface 581 and the second inclined surface 543 collide with each other to cause the slider 540 to be forced to move in the direction away from the lock cylinder 530 and the locking spring 570 to be compressed, so that the slider 540 disengages from the lock groove 531 of the lock cylinder 530, thereby achieving the purpose of unlocking.
- the body 100 includes a housing 600, and the housing 600 is formed with a handle portion 610.
- the axial direction of the drive assembly 400 is substantially perpendicular to the axial direction of the cylinder assembly 300, and the drive assembly 400 includes a motor 410 and a reducer 420 fixed together.
- the reducer 420 includes an output shaft 421, the end of the output shaft 421 extends into the cylinder seat 313 and is sleeved with a crank 430, a pin 315 is provided in the first piston 311, a connecting rod 440 is provided between the pin 315 and the crank 430, the top end of the connecting rod 440 is sleeved on the pin 315 to realize hinged connection with the first piston 311, and the bottom end of the connecting rod 440 is hinged with the crank 430.
- the drive assembly 400 drives the first piston 311 to move back and forth between the ventilation position and the compression position through the crank 430 and the connecting rod 440.
- the cylinder shell 312 of the first cylinder 310 is provided with a plurality of first through holes 316 at intervals and at the same height at the lower end.
- the cylinder barrel 322 is provided with a plurality of second through holes 327 at intervals and at the same height at the lower end, and the lower end of the cylinder barrel 322 is sleeved with an elastic valve sleeve 360 for opening and closing the second through holes 327.
- crank 430 and the connecting rod 440 of the driving assembly 400 are in the overlapped state shown in FIG. 11 , and the first piston 311 is in the ventilation position.
- the top surface of the first piston 311 is lower than the first through hole 316, and the interior of the first cylinder 310 passes through the first through hole 316.
- a through hole 316 is connected to the outside air, and the step portion 541 of the slider 540 abuts against the inner top wall of the locking groove 531 to limit the second piston 321 to the initial position.
- the driving assembly 400 drives the first piston 311 to move upward from the ventilation position through the crank 430 and the connecting rod 440, when the first sealing ring 314 is higher than the first through hole 316, the interior of the first cylinder 310 is isolated from the outside air.
- the first piston 311 continues to move upward, the first piston 311 compresses the air in the first cylinder 310, and the air pressure in the first cylinder 310 increases.
- the first piston 311 reaches the compression position.
- the first inclined surface 581 of the push rod 580 cooperates with the second inclined surface 543 of the slider 540 to make the slider 540 slide and disengage from the lock groove 531, and the second piston 321 is released.
- the compressed air in the first cylinder 310 directly flows into the second cylinder 320 through the vent hole 323 and acts on the top surface of the second piston 321. Part of the compressed air flows into the groove structure and acts on the top surface of the second piston 321 through the shock pad 340.
- the released second piston 321 drives the striker 330 to move downward under the pressure of the compressed air.
- the striker 330 contacts the nail sent by the nail feeding device 200 and applies force to the nail, so that the nail is separated from the nail feeding device 200 and driven into an object such as wood, thereby realizing the nailing action.
- the elastic valve sleeve 360 opens the second through hole 327 under the action of the air pressure difference, and the high-pressure gas in the second cylinder 320 can be discharged to the outside through the second through hole 327.
- the elastic valve sleeve 360 closes the second through hole 327 to isolate the interior of the second cylinder 320 from the outside air.
- the driving assembly 400 driving the first piston 311 to move downward from the compression position to the ventilation position through the crank 430 and the connecting rod 440, the air pressure in the first cylinder 310 and the second cylinder 320 is reduced, and the second piston 321 moves upward from the nailing position to the initial position under the action of negative pressure.
- the second piston 321 moves upward to a position close to the initial position, the upper part of the lock core 530 is inserted into the lock sleeve 520, and the conical surface at the top of the lock core 530 contacts the step portion 541 of the slider 540, so that the slider 540 first overcomes the elastic force of the locking spring 570 and slides a distance away from the lock core 530.
- the step portion 541 corresponds to the lock slot 531, and the slider 540 slides toward the lock core 530 under the elastic force of the locking spring 570 so that the step portion 541 is inserted into the lock slot 531 and contacts the inner top wall of the lock slot 531, thereby limiting the second piston 321 and the striker 330 to the initial position.
- pneumatic nail gun of this embodiment can be powered by a battery pack or directly by AC power through a power cord.
- the cylinder 322 does not have the closing portion 322a, so that the cylinder 322 is directly tubular, which is conducive to reducing the molding process of the cylinder 322.
- the lower end of the locking sleeve 520 is directly inserted into the top end of the cylinder 322.
- the elastic pad 560 is eliminated, and the slot cover 592 is used to cover the slide slot 511, and the slot cover 592 is located at the top of the housing 591.
- an elastic sealing rib 593 is provided between the circumferential outer wall of the slot cover 592 and the circumferential inner wall of the slide slot 511, and the circumferential sealing cooperation between the slot cover 592 and the slide slot 511 is achieved through the sealing rib 593.
- an airtight ring 594 is provided between the nut 550 and the lock sleeve 520, and at the matching position of the fixed seat 510 and the bolt, and the airtight ring 594 is pressed between the top surface of the fixed seat 510 and the top wall of the cylinder shell 312.
- the airtightness on the top side of the fixed seat 510 is achieved by the sealing rib 593 and the airtight ring 594, so as to avoid the compressed air from leaking from the assembly gap of the lock buckle assembly, resulting in a decrease in the air pressure of the compressed air.
- sealing rib 593 and the airtight ring 594 can adopt sealing rings.
- the bottom side of the slide groove 511 is open, the top side of the slide groove 511 is closed, the slider 540 is arranged in the slide groove 511 through a metal cover 591, and the cover 591 is fixed to the fixing seat 510 by screws, and it is avoided to make grooves on the top surface of the fixing seat 510 as much as possible, which is conducive to simplifying the airtight structure of the lock assembly 500.
- the cover 591 is provided with a lug protruding outward, and a hole is provided on the lug, and the fixing seat 510 is provided with a screw hole, which is a blind hole, and the lug is against the bottom surface of the fixing seat 510, and the screw used to fix the cover 591 passes through the hole on the lug and is tightened in the screw hole on the fixing seat.
- top surface of the fixing seat 510 in this embodiment can be airtightly sealed by the elastic pad 560 in the first embodiment or the airtight ring 594 in the third embodiment.
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- Portable Nailing Machines And Staplers (AREA)
Abstract
本发明公开了一种气动钉枪，属于电动工具技术领域，包括机身和送钉装置，机身内设有气缸组件、驱动组件和锁扣组件，气缸组件包括设有第一活塞的第一气缸、设有第二活塞的第二气缸、撞针，第二气缸包括缸筒，第二活塞设于缸筒中，第二活塞和撞针具有初始位置和打钉位置，缸筒设有通气孔，通气孔的至少局部高于处在初始位置的第二活塞的顶面，以使第一气缸内的压缩空气经过通气孔流入第二气缸内并作用于第二活塞使第二活塞带动撞针自初始位置移动至打钉位置。增大压缩空气作用于第二活塞时的有效接触面积，使第二活塞可以获得较大的初始作用力，提高第二活塞带动撞针下行的初始运动速度，从而提高第二活塞带动撞针在打钉时的运动速度。
Description
本发明涉及电动工具技术领域，尤其涉及一种气动钉枪。
钉枪是一种手持式的打钉工具，其通过快速移动的撞针将钉子打入木材等物体中，根据驱动源的不同可以将钉枪分为电动钉枪、气动钉枪、手动钉枪等。现有的气动钉枪一般采用双气缸结构，大气缸内的大活塞移动将大气缸内的空气压缩到一定程度后，小气缸内的活塞被释放，大气缸内的压缩空气经过气流通道流入小气缸中并推动小气缸内的小活塞快速移动，快速移动的小活塞带动撞针同步移动，快速移动的撞针将钉子打入木材等物体中，实现打钉目的。但是，现有的双气缸式气动钉枪中，供压缩空气自大气缸流入小气缸内的气流通道的结构较为复杂，对相关构件的气密性要求较高，压缩空气的流动路径的长度较长，而且压缩空气作用于小活塞的有效接触面积较小，使小活塞所受的初始作用力较小，从而使小活塞的初始运动速度也较小，导致小活塞带动撞针打钉时的速度较小，打钉深度较浅，当被打入的物体较硬时，无法将钉子有效的打入物体中，不利于提高用户的使用体验。
发明内容
为了解决上述现有技术中存在的缺点和不足，本发明提供了一种气动钉枪，在第二气缸的缸筒上设置通气孔，第一气缸内的压缩空气可以经过通气孔直接流入第一气缸内并作用于第二活塞，有效增大打钉深度和将钉子有效打入较硬的物体中，有利于提高用户的使用体验。
为了实现上述技术目的，本发明提供的一种气动钉枪，包括机身和送钉装置，机身内设有气缸组件、驱动组件和锁扣组件，气缸组件包括设有第一活塞的第一气缸、设有第二活塞的第二气缸、由第二活塞带动的撞针，第一活塞由驱动组件驱动且具有通气位置和压缩位置，第二气缸设于第一气缸内且穿过第一活塞，第二气缸包括缸筒，第二活塞设于缸筒中，第二活塞和撞针具有初始位置和打钉位置，锁扣组件在第一活塞自通气位置运动至压缩位置的过程中将第二活塞限位于初始位置，所述缸筒设有用于连通第一气缸内部和第二气缸内部的通气孔，通气孔的至少局部高于处在初始位置的第二活塞的顶面，以使第一气缸内的压缩空气经过通气孔流入第二气缸内并作用于第二活塞使第二活塞带动撞针自初始位置移动至打钉位置。
优选的，所述通气孔高于处在初始位置的第二活塞顶面的面积占比不少于50％。
优选的，所述通气孔的全部高于处在初始位置的第二活塞的顶面。
优选的，所述通气孔沿缸筒的周向间隔设有多个；和/或，所述通气孔为圆孔、方孔、矩形孔、椭圆孔、弧形孔、三角孔中的至少一种。
优选的，所述第二活塞的周向上套设有轴向定位的密封圈，通气孔高于处在初始位置的密封圈。
优选的，所述第二活塞的顶面设有减震垫，减震垫设有供压缩空气流动的凹槽结构。
优选的，所述减震垫的外径小于第二活塞的外径；和/或，所述通气孔的局部高于处在初始位置的减震垫的顶面。
优选的，所述凹槽结构包括若干沿周向间隔分布的径向槽和用于连通径向槽的周向槽。
优选的，所述锁扣组件包括设于第一气缸内的固定座、设于缸筒顶部且插入固定座中的锁套、设于第二活塞上且可插入锁套中的锁芯、可滑动设于固定座上且可与锁芯配合将第二活塞限位于初始位置的滑块，锁套与固定座之间的配合空隙内填充有密封油脂。
优选的，所述固定座设有用于装设滑块的滑槽，滑槽的顶侧敞口，滑块通过罩壳设于滑槽内，固定座的顶部与第一气缸的顶壁之间设有弹性垫；
或者，所述固定座设有用于装设滑块的滑槽和用于盖合滑槽的槽盖，滑槽的顶侧敞口，滑块通过罩壳设于滑槽内，槽盖盖合于滑槽的顶侧，槽盖的周向外壁与滑槽的周向内壁之间设有弹性的密封筋条；
或者，所述固定座设有用于装设滑块的滑槽，滑槽的底侧敞口，滑块通过罩壳设于滑槽内，罩壳与固定座固定在一起。
采用上述技术方案后，本发明具有如下优点：
1、本发明提供的气动钉枪，在第二气缸的缸筒上设置连通两个气缸内部的通气孔，第一气缸内的压缩空气可以经过通气孔直接流入第二气缸内并作用于第二活塞，合理增大压缩空气作用于第二活塞时的有效接触面积，使第二活塞可以获得较大的初始作用力，提高第二活塞在被锁扣组件释放后带动撞针下行的初始运动速度，从而提高第二活塞带动撞针在打钉时的运动速度，有利于增大打钉深度，也有利于将钉子打入较硬的物体中，有利于提高用户的使用体验。另外，由于第一气缸内的压缩空气可以经过通气孔直接流入第二气缸内并作用于第二活塞，无需在锁扣组件或其他构件上设置供压缩空气自第一气缸流入第二气缸内的通道结构，有利于降低相关构件的结构难度和气密性要求。
2、第二活塞处在初始位置时，通气孔面积占比的至少50％高于第二活塞的顶面，或者，通气孔完全高于第二活塞的顶面，保证经过通气孔流入第二气缸内的压缩空气量，使第二活塞和撞针可以获得足够的初始运动速度，有利于提高打钉效果。
3、通气孔优选的沿缸筒的周向间隔设置多个，使第一气缸内的压缩空气可以经过通气孔快速流入第二气缸中并作用于第二活塞，提高第二活塞带动撞针自初始位置移动至打钉位置过程中的运动速度，有利于提高打钉效果。
4、通气孔可以采用单一形状的孔，也可以采用数种不同形状的孔，合理设置通气孔的结构样式，降低通气孔的加工难度，有利于提高生产效率。
5、第二活塞处于初始位置时，通气孔高于第二活塞上的密封圈，使经过通气孔流入第二气缸内的压缩空气可以有效作用于第二活塞，避免经过通气孔流入第二气缸内的压缩空气直接排出而无法有效作用于第二活塞的情况，提高压缩空气对第二活塞的作用效果，有利于提高打钉效果。
6、减震垫的顶面设置凹槽结构，第二活塞处于初始位置时，流入第二气缸内的压缩空气可以在凹槽结构中流动，进一步增大压缩空气作用于第二活塞时的有效接触面积，可以进一步提高第二活塞的初始作用力，从而进一步提高撞针打钉时的运动速度，有利于提高打钉效果。
7、减震垫的外径小于第二活塞的外径，使经过通气孔流入第二气缸内的压缩空气可以直接、有效的作用于第二活塞的顶面，保证第二活塞和撞针的初始运动速度。第二活塞处于初始位置时，通气孔的局部高于减震垫的顶面，使经过通气孔流入第二气缸内的压缩空气可以快速的在凹槽结构中流动，有利于提高压缩空气对第二活塞的作用效果。
8、在锁套与固定座的配合空隙内填充密封油脂，通过密封油脂实现锁套与固定座之间的气密封，避免压缩空气自锁套与固定座之间的装配缝隙处发生泄露导致压缩空气对第二活塞的作用效果减弱的情况。
9、固定座的顶部与第一气缸的顶壁之间设置弹性垫，通过弹性垫实现固定座顶侧的气密封。或者，利用槽盖盖合滑槽，在槽盖与滑槽之间设置密封筋条，通过密封筋条实现滑槽顶侧的气密封。或者，滑槽的底侧敞口，罩壳与固定座固定在一起，尽量避免在固定座的顶部开槽。合理设置滑块的安装结构及固定座的密封结构，避免第一气缸内的压缩空气自装配缝隙处发生泄露导致第一气缸内压缩空气的气压减小的情况，有利于保证压缩空气对第二活塞的作用效果。
图1为实施例一气动钉枪的整体图；
图2为实施例一气动钉枪中机身的内部结构图；
图3为实施例一气动钉枪中气缸组件的结构图；
图4为实施例一气动钉枪中气缸组件的部分结构图；
图5为实施例一气动钉枪中第二活塞处于初始位置时的部分结构图；
图6为实施例一气动钉枪中第二活塞的结构图；
图7为实施例一气动钉枪中第二气缸的缸筒的结构图；
图8为实施例一气动钉枪中第二气缸的缸筒与弹性阀套的配合结构图；
图9为实施例一气动钉枪中第二气缸与锁扣组件的配合结构图；
图10为实施例一气动钉枪中锁扣组件的滑块与罩壳的爆炸图；
图11为实施例一气动钉枪中驱动组件的结构图；
图12为实施例二气动钉枪中第二活塞处于初始位置时的部分结构图；
图13为实施例三气动钉枪中锁扣组件的部分结构图。
图中，100-机身，200-送钉装置，300-气缸组件，310-第一气缸，311-第一活塞，312-缸壳，313-缸座，314-第一密封圈，315-销杆，316-第一通孔，320-第二气缸，321-第二活塞，322-缸筒，322a-收口部，323-通气孔，324-塞头，325-第二密封圈，326-避让孔，327-第二通孔，330-撞针，340-减震垫，341-径向槽，342-周向槽，350-杆体，360-弹性阀套，400-驱动组件，410-电机，420-减速器，421-输出轴，430-曲柄，440-连杆，500-锁扣组件，510-固定座，511-滑槽，512-避让槽，513-插孔，520-锁套，521-槽口，530-锁芯，531-锁槽，540-滑块，541-台阶部，542-通槽，543-第二斜面，550-螺母，560-弹性垫，570-锁紧弹簧，580-顶杆，581-第一斜面，591-罩壳，592-槽盖，593-密封筋条，594-气密圈，600-机壳，610-把手部。
下面结合附图和具体实施例对本发明作进一步说明。需要理解的是，下述的“上”、“下”、“左”、“右”、“纵向”、“横向”、“内”、“外”、“竖直”、“水平”、“顶”、“底”等指示方位或位置关系的词语仅基于附图所示的方位或位置关系，仅为了便于描述本发明和简化描述，而不是指示或暗示所指的装置/元件必须具有特定的方位或以特定的方位构造和操作，因此不能理解为对本发明的限制。
实施例一
结合图1至图11，本发明实施例一提供的一种气动钉枪，包括机身100和送钉装置200，机身100内设有气缸组件300、驱动组件400和锁扣组件500，气缸组件300包括设有第一活塞311的第一气缸310、设有第二活塞321的第二气缸320、由第二活塞321带动的撞针330，第一活塞311由驱动组件400驱动且具有通气位置和压缩位置，第二气缸320设于第一气缸310内且穿过第一活塞311，第二气缸320包括缸筒322，第二活塞321设于缸筒322中，第二活塞321和撞针330具有初始位置和打钉位置，锁扣组件500在第一活塞311自通气位置运动至压缩位置的过程中将第二活塞321限位于初始位置。缸筒322设有用于连通第一气缸310内部和第二气缸320内部的通气孔323，通气孔323的至少局部高于处在初始位置的第二活塞321的顶面，以使第一气缸310内的压缩空气经过通气孔323流入第二气缸320内并作
用于第二活塞321使第二活塞321带动撞针330自初始位置移动至打钉位置。
第一气缸310内的压缩空气可以经过通气孔323直接流入第二气缸320内并作用于第二活塞321，合理增大压缩空气作用于第二活塞321时的有效接触面积，使第二活塞321可以获得较大的初始作用力，提高第二活塞321在被锁扣组件500释放后带动撞针330下行的初始运动速度，从而提高第二活塞321带动撞针330自初始位置移动至打钉位置时的运动速度，有利于增大打钉深度，也有利于将钉子打入较硬的物体中，有利于提高用户的使用体验。
结合图3、图4，本实施例中，第一气缸310包括中空的缸壳312和设于缸壳312底端的缸座313，第一活塞311的周向上通过槽位套设有轴向定位的第一密封圈314，第一活塞311在驱动组件400的驱动作用下可在第一气缸310内上下移动。第二气缸320偏心固定于缸座313上，第二气缸320还包括插设于缸筒322底端的塞头324，第一活塞311上设有偏心设置且与缸筒322配合的通口，第二气缸320的缸筒322自通口处穿过第一活塞311，即第一活塞311可以相对于第二气缸320上下移动，通口的内壁上设有使第一活塞311与缸筒322密封配合的O形密封圈。
结合图5，第二活塞321的周向上通过槽位套设有轴向定位的第二密封圈325，通过第二密封圈325实现第二活塞321与缸筒322之间在周向上的密封配合。为了使流入第二气缸320内的压缩空气能有效作用于第二活塞321，第二活塞321处于初始位置时，通气孔323高于同处于初始位置的第二密封圈325，避免经过通气孔323流入第二气缸320内的压缩空气直接排出而无法有效作用于第二活塞321。
结合图7，缸筒322的顶端设有一体成型的收口部322a，通气孔323设于缸筒322的上端且低于收口部322a。为了使第一气缸310内的压缩空气可以经过通气孔323快速流入第二气缸320中并作用于第二活塞321，通气孔323沿缸筒322的周向间隔设有多个。本实施例中，通气孔323采用圆孔，通气孔323优选的沿缸筒322的周向等间距分布。可以理解的是，通气孔323也可以设置成方孔、矩形孔、椭圆孔、弧形孔、三角孔等其他合理形状的孔，当然，通气孔323也可以同时采用数种不同形状的孔，如同时采用圆孔、方孔、矩形孔、椭圆孔、弧形孔和三角孔中的任意两种或任意三种或任意多种，在此对孔的形状不做过多限制。另外，通气孔323也可以采用非等间距分布的方式，即相邻两个通气孔323之间的中心弧度有所区别。
结合图5，为了保证经过通气孔323流入第二气缸320内的压缩空气量，第二活塞321处于初始位置时，通气孔323面积占比的至少50％高于第二活塞321的顶面。本实施例中，第二活塞321处于初始位置时，通气孔323优选的完全高于第二活塞321的顶面，通气孔323的最低处与第二活塞321的顶面之间具有高度差Δh，使通气孔323面积占比的100％高于处
于初始位置的第二活塞321的顶面。可以理解的是，Δh可以设置为0.2mm、0.5mm、0.7mm、1mm、1.2mm、1.5mm、1.7mm、2mm等合理的大小。当然，当第二活塞321处于初始位置时，通气孔323的最低处也可以与第二活塞321的顶面齐平设置。或者，当第二活塞321处于初始位置时，通气孔323的最低处也可以略低于第二活塞321的顶面设置，使通气孔323的局部高于第二活塞321的顶面，通气孔323高出第二活塞321顶面的面积占比可以设置为50％、55％、60％、65％、70％、75％、80％、85％、90％、95％、99％等合理的大小。
为了减缓第二活塞321向上复位至初始位置时与锁扣组件500之间的撞击，第二活塞321的顶面设有减震垫340，减震垫340设有供压缩空气流动的凹槽结构。结合图6，减震垫340的外径优选的小于第二活塞321的外径，使经过通气孔323流入第二气缸320内的压缩空气可以直接、有效的作用于第二活塞321的顶面。凹槽结构包括若干沿周向间隔分布的径向槽341和用于连通径向槽341的周向槽342，使流入第二气缸320内的压缩空气可以经过凹槽结构平均的作用于第二活塞321的顶面。可以理解的是，周向槽342可以采用弧形槽，也可以采用环形槽，周向槽342根据减震垫340的大小可以内外间隔设置两圈、三圈等合理的数量。当然，凹槽结构也可以设置成其他合理的结构。
结合图5，为了使经过通气孔323流入第二气缸320内的压缩空气可以快速的在凹槽结构中流动，第二活塞321处于初始位置时，通气孔323的局部高于同处在初始位置的减震垫340的顶面，使低于减震垫340顶面的局部通气孔323与凹槽结构大致处于同一高度上，使经过通气孔323流入第二气缸320内的压缩空气可以直接流入凹槽结构中。可以理解的是时，第二活塞321和减震垫340处于初始位置时，通气孔323高于减震垫340顶面的面积占比可以设置为40％、45％、50％、55％、60％等合理的大小。
结合图3、图5、图9，锁扣组件500包括固定座510、锁套520、锁芯530、滑块540、螺母550和锁紧弹簧570，固定座510固定于第一气缸310内的顶端且位于第二气缸320的顶部，固定座510与缸壳312的顶壁之间设有弹性垫560，缸筒322的收口部322a上形成有供锁套520穿过的避让孔326，锁套520沿轴向的截面形状大致呈中空的倒T形，锁套520的板状部位于第一气缸310内且与收口部322a上下相抵，锁套520的柱状部穿过固定座510并通过螺母550锁紧于缸壳312的顶壁上。撞针330的顶端设有杆体350，杆体350的顶端插入第二活塞321中，锁芯530的下端插入第二活塞321中并通过螺钉与杆体350锁紧固定，使锁芯530、杆体350和第二活塞321固定在一起，减震垫340位于锁芯530的外周。锁芯530的上部设有一圈与滑块540配合的锁槽531，固定座510设有沿某一径向延伸的滑槽511，滑块540和锁紧弹簧570设于该滑槽511中，结合图9、图10，滑块540朝向锁芯530的一端设有与锁槽531配合将第二活塞321限位于初始位置的台阶部541，锁套520设有用于避
让滑块540的槽口521，锁紧弹簧570处于压缩状态且一端与滑槽511的槽壁抵触、另一端与滑块540抵触，锁紧弹簧570在常态下将滑块540抵向锁芯530使台阶部541与锁槽531处于锁合状态。本实施例中，滑槽511的顶侧敞口，滑块540和锁芯530均为金属件，固定座510为塑料件，锁块540通过金属的罩壳591设于滑槽511中。
固定座510设有供锁套520的柱状部穿过的插孔513，该插孔513与锁套520的柱状部间隙配合，本实施例中，在锁套520与固定座510之间的配合空隙内填充密封油脂，通过密封油脂实现锁套520与固定座510之间的气密封，避免压缩空气自锁套520与固定座510之间的装配缝隙处发生泄露导致压缩空气对第二活塞的气压作用效果减弱的情况。
固定座510通过螺栓固定于缸壳312的顶壁上，弹性垫560被夹紧于固定座510的顶面和缸壳312的顶壁之间，通过弹性垫560实现固定座510顶侧的气密封，避免第一气缸310内的压缩空气自锁扣组件的装配缝隙处发生泄露导致第一气缸内压缩空气的气压减小的情况，有利于保证压缩空气对第二活塞321的作用效果。
结合图3，为了使锁扣组件500能及时释放第二活塞321，锁扣组件500还包括设于第一活塞311上用于解锁锁扣组件500的顶杆580，顶杆580在背向第一活塞311轴向中心的一侧设有第一斜面581，滑块540设有供顶杆580插入的通槽542，通槽542在背向第一活塞311轴向中心的一侧设有与第一斜面581平行的第二斜面543，固定座510设有用于避让顶杆580的避让槽512，罩壳591设有用于避让顶杆580的槽。第一活塞311自通气位置向上移动至压缩位置的过程中，顶杆580随第一活塞311同步上移并经过避让槽512插入滑块540的通槽542中，第一斜面581与第二斜面543抵触使滑块540受力朝远离锁芯530的方向移动且使锁紧弹簧570受力压缩，滑块540脱离锁芯530的锁槽531，实现解锁目的。
结合图2，机身100包括机壳600，机壳600形成有把手部610。驱动组件400的轴向与气缸组件300的轴向大致垂直设置，驱动组件400包括固定在一起的电机410和减速器420。结合图3、图11，减速器420包括输出轴421，输出轴421的末端伸入缸座313内并套设有曲柄430，第一活塞311内设有销杆315，销杆315与曲柄430之间设有连杆440，连杆440的顶端套设于销杆315上实现与第一活塞311铰接，连杆440的底端与曲柄430铰接。驱动组件400通过曲柄430和连杆440驱动第一活塞311在通气位置和压缩位置之间来回移动。
结合图2，第一气缸310的缸壳312在下端设有若干间隔分布且处于同一高度的第一通孔316。结合图8，缸筒322在下端设有若干间隔分布且处于同一高度的第二通孔327，缸筒322的下端套设有用于开闭第二通孔327的弹性阀套360。
常态下，驱动组件400的曲柄430和连杆440处于图11所示的重合状态，第一活塞311处于通气位置，此时，第一活塞311的顶面低于第一通孔316，第一气缸310的内部经过第
一通孔316与外界空气连通，滑块540的台阶部541与锁槽531的内顶壁抵触将第二活塞321限位于初始位置。
驱动组件400通过曲柄430和连杆440驱动第一活塞311自通气位置向上运动过程中，当第一密封圈314高于第一通孔316时，第一气缸310的内部与外界空气隔断，第一活塞311继续向上移动的过程中，第一活塞311压缩第一气缸310内的空气，第一气缸310内的气压增大。
当曲柄430和连杆440运动至上下分布且位于同一直线上时，第一活塞311到达压缩位置，此时，顶杆580的第一斜面581与滑块540的第二斜面543配合使滑块540滑动并脱离锁槽531，第二活塞321被释放，第一气缸310内的压缩空气直接经过通气孔323流入第二气缸320内并作用于第二活塞321的顶面，部分压缩空气流入凹槽结构并通过减震垫340作用于第二活塞321的顶面，被释放的第二活塞321在压缩空气的压强作用下带动撞针330向下移动。第二活塞321和撞针330向下移动过程中，撞针330与被送钉装置200送出的钉子接触并施力于钉子，使钉子脱离送钉装置200并被打入木头等物体中，实现打钉动作。
当第二活塞321向下移动至与塞头324抵触时，第二活塞321和撞针330向下移动至打钉位置，此时，打钉动作结束，第二活塞321的顶面低于第二通孔327，由于第二气缸320内的气压较大，弹性阀套360在气压差作用下打开第二通孔327，第二气缸320内的高压气体可以经过第二通孔327向外排出。当第二气缸320的内部与外界空气达到气压平衡时，弹性阀套360关闭第二通孔327，使第二气缸320的内部与外界空气隔断。
驱动组件400通过曲柄430和连杆440带动第一活塞311自压缩位置向下移动复位至通气位置的过程中，第一气缸310和第二气缸320内的气压减小，第二活塞321在负压作用下自打钉位置向上移动复位至初始位置。第二活塞321向上移动至靠近初始位置时，锁芯530的上部插入锁套520中，锁芯530顶端的锥形面与滑块540的台阶部541抵触，使滑块540先克服锁紧弹簧570的弹力朝远离锁芯530的方向滑动一段距离。当第二活塞321带动锁芯530向上移动至初始位置时，台阶部541与锁槽531对应，滑块540在锁紧弹簧570的弹力作用下朝向锁芯530滑动使台阶部541插入锁槽531中并与锁槽531的内顶壁抵触，从而将第二活塞321和撞针330限位于初始位置。
打钉时，由于第一气缸310内的压缩空气直接经过通气孔323流入第二气缸320内并作用于第二活塞321，无需在固定座510和锁套520上设置供压缩空气流经的通道结构，对固定座510上气密性结构的要求也适当降低，有利于降低相关构件的结构难度和气密性要求。
本实施例气动钉枪的其他结构可以参考公开号为CN109623736A、US11478912B2的专利文献，在此不作过多赘述。
可以理解的，本实施例的气动钉枪可以利用电池包进行供电，也可以通过电源线直接利用市电进行供电。
实施例二
结合图12，本实施例中，缸筒322取消收口部322a的设置，使缸筒322直接呈管状，有利于降低缸筒322的成型工艺。锁套520的下端直接插设于缸筒322的顶端内。
实施例二的其他结构参考实施例一，此处不再一一赘述。
实施例三
结合图13，本实施例中，取消弹性垫560的设置，利用槽盖592盖合滑槽511，槽盖592位于罩壳591的顶部。为了使固定座510的顶侧实现气密封，槽盖592的周向外壁与滑槽511的周向内壁之间设有弹性的密封筋条593，通过该密封筋条593实现槽盖592与滑槽511之间的周向密封配合。另外，在螺母550和锁套520之间、固定座510与螺栓的配合处均设置气密圈594，气密圈594被压紧于固定座510的顶面和缸壳312的顶壁之间。通过密封筋条593和气密圈594实现固定座510顶侧的气密封，避免压缩空气自锁扣组件的装配缝隙处发生泄露导致压缩空气的气压减小的情况。
实施例三的其他结构参考实施例一，此处不再一一赘述。
可以理解的是的，密封筋条593和气密圈594可以采用密封圈。
可以理解的是的，实施例三可以与实施例二结合。
实施例四
本实施例中，滑槽511的底侧敞口设置，滑槽511的顶侧封闭设置，滑块540通过金属的罩壳591设于滑槽511中，罩壳591通过螺钉与固定座510固定在一起，尽量避免在固定座510的顶面开槽，有利于简化锁扣组件500的气密结构。具体的，罩壳591设置向外凸出的凸耳，凸耳上设置孔，固定座510设置螺孔，螺孔为盲孔，凸耳抵于固定座510的底面，用于固定罩壳591的螺钉穿过凸耳上的孔并拧紧于固定座上的螺孔中。
实施例四的其他结构参考实施例一，此处不再一一赘述。
可以理解的是的，本实施例中固定座510的顶面可以通过实施例一中的弹性垫560或实施例三中的气密圈594实现气密封。
可以理解的是的，实施例四可以与实施例二结合。
除上述优选实施例外，本发明还有其他的实施方式，本领域技术人员可以根据本发明作
出各种改变和变形，只要不脱离本发明的精神，均应属于本发明所附权利要求所定义的范围。
Claims (10)
- 一种气动钉枪，包括机身和送钉装置，机身内设有气缸组件、驱动组件和锁扣组件，气缸组件包括设有第一活塞的第一气缸、设有第二活塞的第二气缸、由第二活塞带动的撞针，第一活塞由驱动组件驱动且具有通气位置和压缩位置，第二气缸设于第一气缸内且穿过第一活塞，第二气缸包括缸筒，第二活塞设于缸筒中，第二活塞和撞针具有初始位置和打钉位置，锁扣组件在第一活塞自通气位置运动至压缩位置的过程中将第二活塞限位于初始位置，其特征在于，所述缸筒设有用于连通第一气缸内部和第二气缸内部的通气孔，通气孔的至少局部高于处在初始位置的第二活塞的顶面，以使第一气缸内的压缩空气经过通气孔流入第二气缸内并作用于第二活塞使第二活塞带动撞针自初始位置移动至打钉位置。
- 根据权利要求1所述的一种气动钉枪，其特征在于，所述通气孔高于处在初始位置的第二活塞顶面的面积占比不少于50％。
- 根据权利要求1所述的一种气动钉枪，其特征在于，所述通气孔的全部高于处在初始位置的第二活塞的顶面。
- 根据权利要求1所述的一种气动钉枪，其特征在于，所述通气孔沿缸筒的周向间隔设有多个；和/或，所述通气孔为圆孔、方孔、矩形孔、椭圆孔、弧形孔、三角孔中的至少一种。
- 根据权利要求1所述的一种气动钉枪，其特征在于，所述第二活塞的周向上套设有轴向定位的密封圈，通气孔高于处在初始位置的密封圈。
- 根据权利要求1所述的一种气动钉枪，其特征在于，所述第二活塞的顶面设有减震垫，减震垫设有供压缩空气流动的凹槽结构。
- 根据权利要求6所述的一种气动钉枪，其特征在于，所述减震垫的外径小于第二活塞的外径；和/或，所述通气孔的局部高于处在初始位置的减震垫的顶面。
- 根据权利要求6所述的一种气动钉枪，其特征在于，所述凹槽结构包括若干沿周向间隔分布的径向槽和用于连通径向槽的周向槽。
- 根据权利要求1所述的一种气动钉枪，其特征在于，所述锁扣组件包括设于第一气缸内的固定座、设于缸筒顶部且插入固定座中的锁套、设于第二活塞上且可插入锁套中的锁芯、可滑动设于固定座上且可与锁芯配合将第二活塞限位于初始位置的滑块，锁套与固定座之间的配合空隙内填充有密封油脂。
- 根据权利要求9所述的一种气动钉枪，其特征在于，所述固定座设有用于装设滑块的滑槽，滑槽的顶侧敞口，滑块通过罩壳设于滑槽内，固定座的顶部与第一气缸的顶壁之间设有弹性垫；或者，所述固定座设有用于装设滑块的滑槽和用于盖合滑槽的槽盖，滑槽的顶侧敞口，滑块通过罩壳设于滑槽内，槽盖盖合于滑槽的顶侧，槽盖的周向外壁与滑槽的周向内壁之间设有弹性的密封筋条；或者，所述固定座设有用于装设滑块的滑槽，滑槽的底侧敞口，滑块通过罩壳设于滑槽内，罩壳与固定座固定在一起。
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| CN116141268A (zh) * | 2022-12-19 | 2023-05-23 | 浙江普莱得电器股份有限公司 | 一种气动钉枪 |
| CN116160412A (zh) * | 2023-02-09 | 2023-05-26 | 浙江普莱得电器股份有限公司 | 气动钉枪 |
| CN219337616U (zh) * | 2022-12-19 | 2023-07-14 | 浙江普莱得电器股份有限公司 | 一种气动钉枪 |
| CN220463770U (zh) * | 2023-02-09 | 2024-02-09 | 浙江普莱得电器股份有限公司 | 气动钉枪 |
-
2022
- 2022-12-19 CN CN202211635672.0A patent/CN116141268A/zh active Pending
-
2023
- 2023-12-18 WO PCT/CN2023/139506 patent/WO2024131724A1/zh unknown
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080006670A1 (en) * | 2006-07-05 | 2008-01-10 | Wan-Fu Wen | Pneumatic Nail Gun |
| US7293684B1 (en) * | 2006-11-14 | 2007-11-13 | De Poan Pneumatic Corp. | Pneumatic nail gun |
| CN109623737A (zh) * | 2018-12-17 | 2019-04-16 | 浙江普莱得电器有限公司 | 一种打钉稳定的钉枪 |
| CN109571373A (zh) * | 2019-01-30 | 2019-04-05 | 浙江荣鹏气动工具股份有限公司 | 一种双气缸电动钉枪撞针上的锁定装置 |
| CN212601653U (zh) * | 2020-05-25 | 2021-02-26 | 浙江普莱得电器股份有限公司 | 一种具有良好密封性能的钉枪 |
| CN112828827A (zh) * | 2021-02-02 | 2021-05-25 | 台州市钉霸电动工具有限公司 | 一种打钉力可调节的气动打钉枪 |
| CN116141268A (zh) * | 2022-12-19 | 2023-05-23 | 浙江普莱得电器股份有限公司 | 一种气动钉枪 |
| CN219337616U (zh) * | 2022-12-19 | 2023-07-14 | 浙江普莱得电器股份有限公司 | 一种气动钉枪 |
| CN116160412A (zh) * | 2023-02-09 | 2023-05-26 | 浙江普莱得电器股份有限公司 | 气动钉枪 |
| CN220463770U (zh) * | 2023-02-09 | 2024-02-09 | 浙江普莱得电器股份有限公司 | 气动钉枪 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116141268A (zh) | 2023-05-23 |
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