CN112276865B - Percussion device of axial nail gun - Google Patents

Percussion device of axial nail gun Download PDF

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Publication number
CN112276865B
CN112276865B CN202011120537.3A CN202011120537A CN112276865B CN 112276865 B CN112276865 B CN 112276865B CN 202011120537 A CN202011120537 A CN 202011120537A CN 112276865 B CN112276865 B CN 112276865B
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China
Prior art keywords
firing
sleeve
rear end
sliding
spring
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CN202011120537.3A
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Chinese (zh)
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CN112276865A (en
Inventor
常凤智
王爱国
朱清华
徐朋
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Nanjing Toua Hardware & Tools Co ltd
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Nanjing Toua Hardware & Tools Co ltd
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Priority to CN202011120537.3A priority Critical patent/CN112276865B/en
Publication of CN112276865A publication Critical patent/CN112276865A/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25CHAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00Hand-held nailing tools; Nail feeding devices
    • B25C1/08Hand-held nailing tools; Nail feeding devices operated by combustion pressure
    • B25C1/10Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25CHAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00Hand-held nailing tools; Nail feeding devices
    • B25C1/08Hand-held nailing tools; Nail feeding devices operated by combustion pressure
    • B25C1/10Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
    • B25C1/18Details and accessories, e.g. splinter guards, spall minimisers

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Toys (AREA)

Abstract

The invention relates to a percussion device of an axial nail gun, belonging to the technical field of striking tools. The firing device. The main sleeve of the percussion device is internally and slidably provided with a percussion sleeve with a first limit axial position and a second limit axial position, and a return spring is arranged between the rear section of the movable sleeve and the shoulder at the rear part of the main sleeve; the tube wall of the firing sleeve is provided with a firing groove and a chute, an inner hole of the firing sleeve is provided with a firing hammer and a firing piece, the front end of the firing hammer is provided with a firing pin, the middle part is fixedly linked with a stop pin, and the rear end of the firing hammer forms a rear end face cam; the front end of the firing piece forms a front end face cam, the middle part is fixedly connected with a sliding pin, the rear end of the firing piece is propped against the front end of the firing spring, and the rear end of the firing spring is limited relative to the handle part. The indexing unlocking device obviously shortens the compression control stroke, is convenient and fast to operate, has a simple structure and good manufacturability, and the indexing of the locking pin is not easy to be blocked, so that the reliability is obviously improved.

Description

Percussion device of axial nail gun
Technical Field
The invention relates to a percussion device, in particular to a percussion device of an axial nail gun, and belongs to the technical field of striking tools.
Background
The nail gun uses the firing pin to fire the nail shooting bullet, so that the gunpowder in the nail shooting gun explodes to generate thrust, and the nail shooting gun drives objects such as building bodies. Specifically, the nail gun firstly compresses energy storage through the firing spring (the firing pin is limited by the sear at the moment), then the trigger is triggered, the sear is pushed by the trigger seesaw to release the firing pin, the trigger is enabled to rapidly move forward under the action of the thrust of the spring, the bottom shell of the nail-shooting bullet is hit, the nail-shooting bullet is enabled to explode to generate thrust, and the nail is shot through the nailing rod.
The trigger of the traditional nail gun trigger is designed in front of the handle, the control must be operated by a hand plate, and the following disadvantages exist during the use: 1) When working on the top surface such as a ceiling, the trigger of the nail gun must be lifted up enough to be controlled, so that the labor intensity is high, the working efficiency is low, and potential safety hazards exist; 2) When working towards the ground, the operation of bending down is needed, and the operation is still easy to fatigue to cause chronic damage; 3) In a side operation such as a wall, construction is also difficult when it is encountered that the terrain or the obstacle is limited to be inaccessible.
In order to solve the problems, the patent document with the application number of CN201520748109.3 discloses an axial nailing gun technical scheme, and the original manual wrenching of a seesaw release firing pin is changed into axial movement of the inner circle of a firing pin sleeve to release the firing pin, so that the axial force application is realized to complete all operations, and the defects of the traditional nailing gun are overcome; and the extension rod is arranged according to the requirement, so that the remote operation can be realized, and the defect that the traditional nail gun has to operate in a short range is overcome.
However, the following disadvantages are found in practice in this technical solution: the inclined key for pressing the brake pin is high in machining precision, inconvenient to assemble and adjust, large in firing stroke for the brake pin to finish releasing, and poor in radial retraction reliability.
Disclosure of Invention
The invention aims at: aiming at the defects existing in the prior art, the axial nail gun percussion device is provided with a short percussion stroke and is stable and reliable, so that the axial nail gun is more convenient and safer to use.
In order to achieve the above purpose, the basic technical scheme of the axial nail gun percussion device of the invention is as follows: the device comprises a main sleeve, a trigger sleeve and a return spring, wherein the front section of the main sleeve is sleeved on the rear part of a movable sleeve, the rear end of the main sleeve is fixedly connected with a handle, the trigger sleeve is slidably arranged in the main sleeve and provided with a first limit axial position and a second limit axial position, and the return spring is arranged between the rear section of the movable sleeve and a shoulder at the rear part of the main sleeve;
The tube wall of the firing sleeve is provided with a firing groove and a sliding groove which are axially extended, the rear end of the firing groove is provided with a locking recess, a firing hammer and a firing piece which are axially matched with the inner hole of the firing sleeve in a sliding way are respectively arranged in front of and behind the inner hole of the firing sleeve, the front end of the firing hammer is provided with a firing pin, the middle part of the firing hammer is fixedly connected with a locking pin which is matched with the firing groove in a sliding way, and the rear end of the firing pin forms a rear end cam; the front end of the firing piece forms a front end face cam matched with the rear end face cam, a sliding pin fixedly connected with the middle part matched with the sliding groove, the rear end of the firing piece is abutted against the front end of the firing spring, and the rear end of the firing spring is limited relative to the handle part;
When the firing sleeve in the main sleeve is positioned at a first limit axial position of a state that both the return spring and the firing spring are unfolded, the sliding pin is positioned at the front end of the sliding groove, the rear end face cam of the firing hammer and the front end cam of the firing piece are positioned in a disengaged state, and the firing hammer is positioned at a locking position because the locking pin is positioned at a locking recess embedded in the rear end of the firing groove;
When the firing sleeve in the main sleeve is positioned at a second limit axial position of the return spring and the firing spring in a compressed state, the sliding pin is positioned at the rear end of the sliding groove, the rear end face cam of the firing hammer and the front end cam of the firing piece are positioned in an engaged indexing state, and the firing hammer is positioned at a firing position because the locking pin is separated from the locking recess at the rear end of the firing groove.
According to the invention, by means of the end face cam pair and the motion pair between the main sleeve, the percussion hammer and the percussion piece, the energy storage forward movement of the compression spring at the handle part of the nail gun is converted into the indexing unlocking motion, so that the percussion hammer releases the energy storage of the spring due to the fact that the locking pin is separated from the locking recess, and the nail-shooting cartridge bottom shell is detonated by the striking pin, and the nail-shooting operation is completed by generating thrust. Compared with the prior art, the indexing unlocking device has the advantages that the compression control stroke is obviously shortened, the operation is convenient, the structure is simple, the manufacturability is good, the indexing of the locking pin is not easy to be blocked, and the reliability is obviously improved.
The invention is further perfected as follows: the two ends of the return spring are respectively in circumferential collision with the movable sleeve and the firing sleeve, so that the movable sleeve and the main sleeve tend to be separated, and the firing sleeve tends to be locked in a steering way. Therefore, the spring not only can enable the firing sleeve to automatically return to the first limit position, but also is helpful for keeping the locking pin at the locking concave embedded into the rear end of the firing groove, so that the locking is safer and more reliable.
The invention is further perfected as follows: the front end of the movable sleeve is fixedly connected with the gun barrel, a needle striking tube is inserted into the rear end of the gun barrel, and an expanding retainer ring and an end plug segment are arranged at the rear part of the needle striking tube; the front section of the inner hole of the firing sleeve is in sliding fit with the outer circle of the end plug section.
The invention is still further perfected as follows: the rigidity of the firing spring is greater than that of the return spring. Therefore, when the force is applied forwards, the return spring and the firing spring are compressed in sequence, and when the firing spring fires, the return spring plays a certain role in vibration reduction.
The invention is further perfected as follows: the back section reducing outer sleeve of the movable sleeve is provided with a return spring which is limited at the shoulder at the back part of the main sleeve hole.
The invention is further perfected as follows: the back end of the firing spring is propped against the diameter-reducing step of the handle connecting pipe, and a spring core rod is arranged in the firing spring.
The invention is still further perfected as follows: the rear part of the main sleeve is sleeved with a sheath.
The invention is further perfected as follows: the tube wall of the firing sleeve is provided with two symmetrically-distributed firing grooves and two symmetrically-distributed axially-extending sliding grooves, the middle part of the firing hammer is fixedly connected with locking pins, the two ends of the locking pins are respectively matched with the two firing grooves in a sliding manner, and the middle part of the firing part is fixedly connected with sliding pins, the two ends of the sliding pins are respectively matched with the two sliding grooves.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic view of a nail gun employing a trigger of the present invention.
Fig. 2 is a schematic diagram of a natural state structure according to an embodiment of the present invention.
Fig. 3 is a schematic perspective view of the main components of the embodiment of fig. 2.
Fig. 4 is a schematic diagram illustrating a locked state structure of the embodiment of fig. 2.
FIG. 5 is a top view of the firing sleeve of FIG. 4 assembled.
Fig. 6 is a schematic diagram of an unlocking process in the embodiment of fig. 2.
FIG. 7 is a top view of the firing sleeve of FIG. 6 assembled.
FIG. 8 is a schematic view of the embodiment of FIG. 2 in a fired state.
Detailed Description
As shown in fig. 1 to 8, the front section of the main sleeve 8 is slid on the rear section of the movable sleeve 10, and the rear end of the main sleeve 8 is fixedly connected with the handle 1 through the handle connecting pipe 2 fixedly connected with the main sleeve 8. The rear part of the main sleeve 8 is externally sheathed with a sheath 18. A firing sleeve 7 having first and second extreme axial positions is mounted within the main sleeve 8. The back section of the movable sleeve 10 is sleeved with a return spring 15 limited at the shoulder at the back of the hole of the main sleeve 8.
The front end of the movable sleeve 10 is fixedly connected with a gun barrel 11 with a nail 12 arranged in an inner hole, a dust cover 13 is covered on the gun barrel 11, a firing pin tube 9 is inserted into the rear end of the gun barrel 11, and the structure is similar to the prior art and is not expanded in detail. The back of the needle striking tube 9 is provided with an expanding retainer 9-1 and an end plug segment 9-2. The front section of the inner hole of the firing sleeve 7 and the outer circle of the end plug section 9-2 form a sliding fit relationship, so that the front section of the inner hole is organically combined with the sliding fit of the firing sleeve 7 and the main sleeve 8 in the firing process, and a good guiding effect is always kept.
The tube wall of the firing sleeve 7 is provided with two firing grooves 7-1 which are symmetrically distributed and axially extend and provided with locking recesses 7-2 at the rear end and a chute 7-3 (see figure 8) which axially extends, and the front and rear of the inner hole of the firing sleeve 7 are respectively provided with a firing hammer 4 and a firing piece 16 which are axially matched with the inner hole in a sliding way. The front end of the firing hammer 4 is provided with a firing pin 14 through a connecting pin, the middle part is fixedly connected with a locking pin 5, the two ends of which are respectively in sliding fit with the two firing grooves 7-1, and the rear end of the locking pin forms a rear end face cam 4T. The front end of the firing part 18 forms a front end face cam 16T matched with the rear end face cam 4T, and the middle part is fixedly connected with a sliding pin 16-1, the two ends of which are respectively matched with the two sliding grooves 7-3, and the rear end of the firing part is abutted against the front end of the firing spring 3. The rear end of the firing spring 3 abuts against the reduced diameter step of the shank adapter 2, thus being limited relative to the shank 1, and also houses therein a spring core rod 19 which remains stable. The firing spring 3 is stiffer than the return spring 15.
In a normal state, when the firing sleeve 7 in the main sleeve 8 is at the first extreme axial position where both the return spring 15 and the firing spring 3 are in a stretched state, as shown in fig. 4 and 5, the slide pin 16-1 is at the front end of the slide groove 7-3, the rear end cam 4T of the firing hammer 4 is in a disengaged state with the front end cam 16T of the firing member 16, and the firing hammer 4 is in a locked position because the lock pin 5 is in the lock recess 7-2 embedded in the rear end of the firing groove 7-1.
When the nail gun is used, when the front end of the nail gun is propped against a to-be-shot nail matrix and is compressed forwards by the force of the handle, the firing sleeve 7 in the main sleeve 8 passes through the intermediate unlocking transitional state shown in fig. 6 and 7 until the second limit axial position in the pressure compressing state of the return spring 15 and the firing spring 3 is reached, the sliding pin 16-1 is positioned at the rear end of the sliding groove 7-3, the rear end face cam 4T of the firing hammer 4 and the front end cam 16T of the firing piece 16 are positioned in the meshing indexing state, and the firing hammer 4 is positioned in the firing position shown in fig. 8 because the locking pin 5 is separated from the rear end locking recess 7-2 of the firing groove 7-1.
After that, because the locking pin loses the axial locking constraint function to the percussion hammer, under the action of the elastic force of the percussion spring, the percussion hammer drives the percussion pin to rapidly move forwards, and the tail part of the nail is hit, so that percussion and nail shooting are completed. After the firing is finished, the firing hammer is reset under the action of the return spring, and the locking pin is restored to the state shown in fig. 5.
Experiments show that compared with the prior art, the embodiment has the following remarkable advantages in addition to the beneficial effects:
1) The locking pin has a limiting function and is simple and reliable in structure;
2) The cam mechanism is combined with the firing spring and the return spring, so that the locking pin can reset by itself without adding an additional reset elastic piece;
3) The bilateral symmetry locking structure enables the atress to be balanced, is favorable to reducing wearing and tearing, prolongs the life of wearing and tearing.
In addition to the embodiments described above, other embodiments of the invention are possible. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the invention.

Claims (3)

1. The utility model provides an axial nail gun percussion ware, includes anterior segment sliding sleeve in movable sleeve (10) rear portion, main cover (8) that rear end and stalk portion (1) link firmly, the interior cooperation installation of main cover has percussion cover (7) of first and second limit axial position, its characterized in that: a return spring (15) is arranged between the rear section of the movable sleeve and the shoulder at the rear part of the main sleeve;
The tube wall of the firing sleeve is provided with an axially extending firing groove (7-1) and an axially extending chute (7-3) with a locking recess (7-2) at the rear end, a firing hammer (4) and a firing part (16) which are axially matched with the inner hole of the firing sleeve in a sliding way are respectively arranged in front of and behind the inner hole of the firing sleeve, a firing pin (14) is arranged at the front end of the firing hammer, a locking pin (5) which is fixedly connected with the firing groove in a sliding way is fixedly connected with the middle part of the firing hammer, and a rear end cam is formed at the rear end of the firing hammer; the front end of the firing piece forms a front end face cam matched with the rear end face cam, a sliding pin (16-1) fixedly connected with the middle part matched with the sliding groove, the rear end of the firing piece is propped against the front end of the firing spring (3), and the rear end of the firing spring (3) is limited relative to the handle part;
When the firing sleeve in the main sleeve is positioned at a first limit axial position of a state that both the return spring and the firing spring are unfolded, the sliding pin is positioned at the front end of the sliding groove, the rear end face cam of the firing hammer and the front end face cam of the firing piece are positioned in a disengaged state, and the firing hammer is positioned at a locking position because the locking pin is positioned at a locking recess embedded in the rear end of the firing groove;
When the firing sleeve in the main sleeve is positioned at a second limit axial position of the return spring and the firing spring in a compressed state, the sliding pin is positioned at the rear end of the sliding groove, the rear end face cam of the firing hammer and the front end face cam of the firing piece are positioned in an engaged indexing state, and the firing hammer is positioned in a firing position because the locking pin is separated from the locking recess at the rear end of the firing groove;
The front end of the movable sleeve is fixedly connected with the gun barrel, a needle striking tube is inserted into the rear end of the gun barrel, and an expanding retainer ring and an end plug segment are arranged at the rear part of the needle striking tube; the front section of the inner hole of the firing sleeve is in sliding fit with the outer circle of the end plug section;
the rigidity of the firing spring is greater than that of the return spring;
the back section reducing outer sleeve of the movable sleeve is provided with a return spring which is limited at the shoulder at the back part of the main sleeve hole;
The tube wall of the firing sleeve is provided with two symmetrically-distributed firing grooves and two symmetrically-distributed axially-extending sliding grooves, the middle part of the firing hammer is fixedly connected with locking pins, the two ends of the locking pins are respectively matched with the two firing grooves in a sliding manner, and the middle part of the firing part is fixedly connected with sliding pins, the two ends of the sliding pins are respectively matched with the two sliding grooves.
2. The axial nailer firing device of claim 1 wherein: the back end of the firing spring is propped against the diameter-reducing step of the handle connecting pipe, and a spring core rod is arranged in the firing spring.
3. The axial nailer firing device of claim 2 wherein: the rear part of the main sleeve is sleeved with a sheath.
CN202011120537.3A 2020-10-19 2020-10-19 Percussion device of axial nail gun Active CN112276865B (en)

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Application Number Priority Date Filing Date Title
CN202011120537.3A CN112276865B (en) 2020-10-19 2020-10-19 Percussion device of axial nail gun

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Application Number Priority Date Filing Date Title
CN202011120537.3A CN112276865B (en) 2020-10-19 2020-10-19 Percussion device of axial nail gun

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CN112276865A CN112276865A (en) 2021-01-29
CN112276865B true CN112276865B (en) 2024-06-04

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CN106475968A (en) * 2016-11-08 2017-03-08 宜宾市南溪区科诚机电厂 It is applied to the percussion release device on axial screw shooter
CN109940557A (en) * 2017-12-20 2019-06-28 宜宾市南溪区科诚机电厂 The axial nailing device of quick ejection
CN110605688A (en) * 2019-08-08 2019-12-24 南京腾亚精工科技有限公司 Anti-clamping stagnation fastener striking tool

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CN106475968A (en) * 2016-11-08 2017-03-08 宜宾市南溪区科诚机电厂 It is applied to the percussion release device on axial screw shooter
CN109940557A (en) * 2017-12-20 2019-06-28 宜宾市南溪区科诚机电厂 The axial nailing device of quick ejection
CN110605688A (en) * 2019-08-08 2019-12-24 南京腾亚精工科技有限公司 Anti-clamping stagnation fastener striking tool

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