CN109693210B

CN109693210B - Nailing gun

Info

Publication number: CN109693210B
Application number: CN201710985389.3A
Authority: CN
Inventors: 郝敬冬; 刘翔翔; 赵小哲
Original assignee: Nanjing Deshuo Industrial Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2017-10-20
Filing date: 2017-10-20
Publication date: 2021-05-11
Anticipated expiration: 2037-10-20
Also published as: CN109693210A

Abstract

The invention discloses a nailing gun, comprising: the nail striking mechanism comprises a nail striking assembly, a first cylinder, a first piston, a second cylinder, a second piston, a locking assembly and a biasing element; the first piston and the nail striking assembly are fixedly connected and divide the space in the first cylinder into a first chamber and a second chamber, the second piston divides the space in the second cylinder into a third chamber and a fourth chamber, the third chamber is communicated with the first chamber, the locking assembly has a locking state for locking the movement of the nail striking assembly and a releasing state for releasing the movement of the nail striking assembly, and the biasing element generates a biasing force for driving the locking assembly to move towards the locking state; when the pressure of the gas in the space formed by the communication of the first chamber and the third chamber is greater than a predetermined value during the movement of the second piston in the direction to reduce the third chamber, the gas in the space acts on the locking assembly and generates a force that drives the biasing force of the locking assembly to switch to the released state. The striking force of the nailing gun can be adjusted.

Description

Nailing gun

Technical Field

The invention relates to a nailing gun, in particular to a nailing gun with adjustable striking force.

Background

Nailing machine is extensively being applicable to the fastening technology field, and the user uses nailing machine can be with the quick work piece of beating into of nail.

However, different specifications of nails may need to be driven into different workpieces, or the driving depth of the nails may be different for different workpieces, so that when different requirements need to be met, users often need to replace different nailing guns, which not only increases the cost, but also reduces the working efficiency.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide a nailing gun with adjustable striking force.

In order to achieve the above object, the present invention adopts the following technical solutions:

a nailing gun comprising: the device comprises a shell, a nail striking assembly, a prime mover, a first cylinder, a first piston, a second cylinder, a second piston, a locking assembly and a biasing element; the nail striking assembly is used for impacting a fastener, the prime motor is arranged in the shell, the first piston is arranged in the first cylinder and fixedly connected with the nail striking assembly, the first piston also divides the space in the first cylinder into a first chamber and a second chamber, the second piston is arranged in the second cylinder and driven by the prime motor to reciprocate in the second cylinder, the second piston divides the space in the second cylinder into a third chamber and a fourth chamber, the third chamber is communicated with the first chamber, the locking assembly has a locking state for locking the movement of the nail striking assembly relative to the first cylinder and a releasing state for releasing the movement of the nail striking assembly relative to the first cylinder, and the biasing element generates a biasing force for driving the locking assembly to move towards the locking state; wherein, when the pressure of the gas in the space formed by the communication of the first chamber and the third chamber is greater than a predetermined value when the second piston moves in a direction to reduce the third chamber, the gas in the space acts on the locking assembly and generates a force to drive the locking assembly against the biasing force of the biasing element to switch the locking assembly to the released state.

Further, the nailing gun further comprises: an adjustment member; the adjustment member is operable by a user to adjust the magnitude of the biasing force of the biasing element against the locking assembly.

Further, the preset value varies as the adjustment member adjusts the magnitude of the biasing force generated by the biasing element on the locking assembly.

Further, the biasing element is a coil spring.

Further, the space formed by the communication of the first chamber and the third chamber is sealed relative to the outside.

Further, the locking assembly includes: a locking member and a driving member; the locking piece locks the position of the nail striking assembly when contacting and matching with the nail striking assembly, and the driving piece is biased by the biasing element to drive the locking piece to move towards the position contacting and matching with the nail striking assembly; the driving member is at least partially arranged in a space formed by the communication of the first chamber and the third chamber.

Further, the nailing assembly comprises: a nail striking pin and a connecting piece; the connecting piece is used for connecting the nail striking pin to the first piston; the nail hitting pin is fixedly connected with the connecting piece or integrally formed; the locking assembly includes: an inner sleeve, a ball and an outer sleeve; the inner sleeve has a slot formed in its wall that extends radially through the inner sleeve, the ball being disposed at least partially within the slot, the outer sleeve being mounted on the outside of the inner sleeve and being movable between a first position in which the outer sleeve drives the ball to lock the position of the connector and a second position in which the ball allows the connector to disengage.

Further, the outer sleeve is at least partially located in a space formed by the communication of the first chamber and the third chamber.

Further, the nailing gun further comprises: a limiting member; the limiting member is used for limiting the outer sleeve to the second position when the ball releases the connecting piece.

Further, the connecting piece can drive the limiting piece to be separated from the limiting of the outer sleeve when the first piston moves towards the direction of reducing the first chamber.

The invention has the advantages that: the striking force of the nailing gun can be adjusted.

Drawings

FIG. 1 is a perspective view of the nailer of the present invention;

FIG. 2 is a plan view of the nailer of FIG. 1;

FIG. 3 is a cross-sectional view of the nailer of FIG. 2 with the locking assembly in a locked condition;

FIG. 4 is an enlarged view of a portion of the structure of FIG. 3;

FIG. 5 is a cross-sectional view of the nailer of FIG. 2 with the locking assembly in a released condition;

fig. 6 is an enlarged view of a part of the structure in fig. 5.

Detailed Description

The nailing machine 100 shown in fig. 1 is suitable for use in the field of fastening technology, and a user can drive a nail into a workpiece using the nailing machine 100. As shown in fig. 1 to 3, the nailing machine 100 may be specifically an electric nailing machine 100, in this embodiment, the nailing machine 100 may be powered by connecting to a battery pack, but it should be understood that in other embodiments, the nailing machine 100 may also be connected to a commercial power supply to supply power by ac power.

As shown in fig. 1 to 6, the nailing gun 100 includes: a housing 11, a prime mover 12, a transmission 13, a drive assembly 20, a staple driving assembly 14 and a staple magazine 15.

The housing 11 is formed with: a handle portion 111, a first accommodating portion 112, and a second accommodating portion 113. The handle portion 111 is used for being held by a user, the first accommodating portion 112 is used for accommodating the prime mover 12 and the transmission 13, and the second accommodating portion 113 is used for accommodating the driving assembly 20 and the nailing assembly 14. The handle portion 111 and the first accommodating portion 112 extend in the same direction from the second accommodating portion 113.

The prime mover 12 is embodied as an electric motor in the present embodiment. The end of the handle portion 111 away from the second receiving portion 113 can be connected to a battery pack, which is electrically connected to the motor.

A transmission 13 is disposed between the prime mover 12 and the drive assembly 20, and the transmission 13 may specifically include: a reduction assembly 131 and a linkage assembly 132. The reduction assembly 131 may specifically include a multi-stage planetary gear train 131 a. The link assembly 132 includes a drive lever 132a for outputting power, and the drive lever 132a is rotatable about the first axis 101.

The driving assembly 20 includes: a first cylinder 21, a second cylinder 22, a first piston 23 and a second piston 24.

The first cylinder 21 and the second cylinder 22 may be disposed in parallel, the volume of the first cylinder 21 is smaller than that of the second cylinder 22, and the first cylinder 21 may be particularly disposed outside the second cylinder 22.

The first piston 23 is disposed in the first cylinder 21, and the first piston 23 is capable of reciprocating in the first cylinder 21 along a first line 102, wherein the first line 102 is perpendicular to the first axis 101. The first piston 23 divides a space surrounded by the first cylinder 21 into a first chamber 211 and a second chamber 212, and the first chamber 211 and the second chamber 212 are respectively located on both sides of the first piston 23. The first piston 23 is also fixedly connected with the nail striking assembly 14, so that when the first piston 23 reciprocates in the first cylinder 21, the nail striking assembly 14 is driven to reciprocate, thereby realizing the nail striking operation.

The second piston 24 is disposed in the second cylinder 22, and the second piston 24 can reciprocate in the second cylinder 22 along a second straight line 103, and the second straight line 103 is also parallel to the first straight line 102. The second piston 24 divides a space surrounded by the second cylinder 22 into a third chamber 221 and a fourth chamber 222, and the third chamber 221 and the fourth chamber 222 are respectively located on both sides of the second piston 24. The second piston 24 is also connected to a drive rod 132a in the connecting rod assembly 132, and the first axis 101 is perpendicular to the second line 103, so that the drive rod 132a rotates about the first axis 101 to drive the second piston 24 to reciprocate in the second cylinder 22. The third chamber 221 is further communicated with the first chamber 211 to form a space closed with respect to the outside, the second chamber 212 is communicated with the outside, and the fourth chamber 222 is also communicated with the outside, so that when the second piston 24 moves in the second cylinder 22 in a direction to reduce the third chamber 221, the pressure of the gas in the space formed by the communication between the first chamber 211 and the third chamber 221 is increased, thereby applying a large driving force to the whole body formed by the first piston 23 and the nail striking assembly 14.

The driving assembly 14 is used to drive a fastener such as a nail. The nailing assembly 14 includes: a nail striking pin 141 for striking a nail, and a link 142 for fixedly connecting the nail striking pin 141 to the first piston 23. The coupling 142 is at least partially located within the first chamber 211. The connecting member 142 and the nailing pin 141 may be fixedly connected or integrally formed.

The magazine 15 is disposed outside the housing 11, and a plurality of nails are accommodated in the magazine 15, and the nail striking pin 141 can strike the nails to be driven into the workpiece.

In order to enable the driving assembly 20 to drive the striking pin 141 to apply a large impact force to the nail, the nailing machine 100 further includes a locking assembly 30 for locking the movement of the striking assembly 14 relative to the first cylinder 21.

The locking assembly 30 has a locked state for locking the movement of the nailing assembly 14 with respect to the first cylinder 21 as shown in fig. 3 and 4 and a released state for releasing the movement of the nailing assembly 14 with respect to the first cylinder 21 as shown in fig. 5 and 6. The nailing gun 100 further includes a biasing member 41, the biasing member 41 generating a biasing force that urges the locking assembly 30 toward the locked condition. Thus, when the second piston 24 moves along the second line 103 in a direction to narrow the third chamber 221, the pressure of the gas in the space formed by the first chamber 211 and the third chamber 221 gradually increases, and the gas in the space acts on the locking assembly 30 and applies a force to the locking assembly 30, and when the pressure of the gas in the space formed by the first chamber 211 and the third chamber 221 is greater than a predetermined value, the force applied to the locking assembly 30 by the gas in the space is so great as to overcome the biasing force of the biasing element 41 on the locking assembly 30 to switch the locking assembly 30 from the locking state to the releasing state, and at this time, the gas in the space formed by the first chamber 211 and the third chamber 221 will instantaneously drive the nail striking assembly 14 to strike a nail to strike a workpiece. Thus, the nailing gun 100 of the present invention can adjust the striking force of the nailing gun 100 by adjusting the biasing force of the biasing member 41 to the locking assembly 30.

The locking assembly 30 includes: a locking element, in particular a ball 31, a driving element, in particular an outer sleeve 32, and an adjusting element 42. The adjusting member 42 is used for a user to operate to adjust the magnitude of the biasing force of the biasing member 41 on the locking assembly 30, so that when the biasing force of the biasing member 41 on the locking assembly 30 changes, the above-mentioned preset value of the gas pressure changes correspondingly, and correspondingly, the pressure of the gas in the space formed by the communication between the first chamber 211 and the third chamber 221 needs to reach the preset value adaptively, so that the driving force acting on the first piston 23 changes correspondingly, and further the impact force of the first piston 23 on the nail changes, thereby realizing the adjustment of the striking force of the nailing gun 100.

Specifically, the locking assembly 30 further includes an inner sleeve 33, the inner sleeve 33 surrounding a receiving cavity 331 for receiving at least a portion of the connecting member 142, the connecting member 142 being insertable into the receiving cavity 331. The cylindrical wall of the inner sleeve 33 is formed with a groove 332 radially penetrating the inner sleeve 33, the groove 332 communicating with the receiving chamber 331. The ball 31 is disposed within the groove 332. The outer sleeve 32 is sleeved outside the inner sleeve 33, the inner wall of the outer sleeve 32 is formed with a first contact portion 321 and a second contact portion 322 which can be contacted with the ball 31 respectively, wherein the second contact portion 322 is recessed relative to the first contact portion 321, or the second contact portion 322 is farther away from the inner sleeve 33 relative to the first contact portion 321, and the second contact portion 322 is closer to the nailing pin 141 relative to the first contact portion 321 in a direction parallel to the first straight line 102. Both the inner sleeve 33 and the outer sleeve 32 extend in a direction parallel to the first line 102. The first contact portion 321 and the second contact portion 322 are disposed at different positions in a direction parallel to the first straight line 102. The outer sleeve 32 is also movable relative to the inner sleeve 33 in a direction parallel to the first line 102. in particular, the biasing force of the biasing element 41 acts on the outer sleeve 32 to drive the outer sleeve 32 in a direction parallel to the first line 102. The outer sleeve 32 has a closed end forming a bottom 323 and an open end facing the first chamber 211. The nailing machine 100 further includes a rear cover 16 for sealing the first and second cylinders 21 and 22, and the biasing member 41 is embodied as a coil spring provided between the rear cover 16 and the bottom 323 of the outer sleeve 32. One side of the bottom 323 of the outer sleeve 32, which is located outside the outer sleeve 32, is supported by the coil spring, and the other side of the bottom 323 of the outer sleeve 32, which is located in the space surrounded by the outer sleeve 32, is subjected to the gas in the first chamber 211, that is, the outer sleeve 32 is partially disposed in the space formed by the communication between the first chamber 211 and the third chamber 221. Thus, if the biasing force of the biasing element 41 against the outer sleeve 32 is greater than the force of the gas in the first chamber 211 against the outer sleeve 32, the outer sleeve 32 may move into the first chamber 211 to a first position as shown in fig. 3 and 4; and if the force of the gas in the first chamber 211 on the outer sleeve 32 is greater than the biasing force of the biasing element 41 on the outer sleeve 32, the outer sleeve 32 moves in the other direction to the second position shown in fig. 5 and 6, so that the first contact portion 321 and the second contact portion 322 may be in contact with the ball 31, respectively.

The connecting member 142 is also formed with a recess 142a, the recess 142a being further an annular groove, the ball 31 being able to be partially inserted into the recess 142a, when the ball 31 is in contact with and fitted to the connecting member 142, that is, when the ball 31 is inserted into the recess 142a of the connecting member 142, the ball 31 will lock the position of the connecting member 142 in the first cylinder 21, so that the nailing pin 141 is not able to move relative to the first cylinder 21 at this time; when the ball 31 is disengaged from the coupling member 142, the position of the coupling member 142 in the first cylinder 21 is released, so that the striking pin 141 can move relative to the first cylinder 21 to perform striking of the nail.

The outer sleeve 32 is biased by the biasing element 41 to drive the ball 31 toward the position of contact and engagement with the nailing assembly 14, and specifically, when the biasing force of the biasing element 41 to the outer sleeve 32 is greater than the force of the gas in the first chamber 211 to the outer sleeve 32, the outer sleeve 32 moves to the first position, in which the first contact portion 321 moves to the position of contact with the ball 31, because the distance between the first contact portion 321 and the recess 142a of the connector 142 is substantially the same as the diameter of the ball 31, in which the first contact portion 321 inserts the driving ball 31 into the recess 142a, thereby locking the position of the nailing assembly 14; when the force of the gas in the first chamber 211 on the outer sleeve 32 is greater than the biasing force of the biasing element 41 on the outer sleeve 32, the force will drive the outer sleeve 32 to move away from the first chamber 211 to the second position, and the first contact portion 321 will move to a position out of the ball 31 and the second contact portion 322 will move to a position aligned with the groove 332, and because the second contact portion 322 is recessed relative to the first contact portion 321 and the distance between the second contact portion 322 and the groove 142a is greater than the diameter of the ball 31, the ball 31 can move to a position out of the groove 142a, thereby allowing the connecting member 142 to disengage the ball 31 and releasing the movement of the nail assembly 14 relative to the first cylinder 21.

Of course, to facilitate resetting of the attachment member 142, the nailer 100 also includes a stop 43 for limiting the outer sleeve 32 to the second position. Specifically, the stopper 43 is provided in the inner sleeve 33, and a small spring 44 for biasing the stopper 43 is further provided at the bottom 333 of the inner sleeve 33, and when the link 142 is locked by the ball 31, the stopper 43 is located between the link 142 and the bottom 333 of the inner sleeve 33, and the small spring 44 biases the stopper 43. When the second contact portion 322 is aligned with the groove 332, the connecting member 142 is disengaged from the ball 31 by the gas in the first chamber 211, and the small spring 44 drives the limiting member 43 to move to a position aligned with the groove 332, because the distance between the limiting member 43 and the second contact portion 322 is substantially the same as the diameter of the ball 31, the ball 31 is driven from the limiting member 43 to limit the outer sleeve 32 at the second position, and when the first piston 23 moves in a direction to reduce the first chamber 211, the connecting member 142 is gradually reset and can drive the limiting member 43 out of contact with the ball 31, and the limiting member 43 no longer has a limiting effect on the outer sleeve 32, and the biasing member 41 biases the outer sleeve 32 to move toward the first position, and finally the first contact portion 321 is brought into contact with the groove 332, thereby locking the position of the connecting member 142.

As shown in fig. 1, the adjustment member 42 may be embodied as a knob for operation by a user. As shown in fig. 1 and 4, the knob is configured to be in flat engagement with a nut 45, the nut 45 is configured to rotate synchronously with the adjustment member 42, and the nut 45 is further configured to move relative to the adjustment member 42 in a direction parallel to the first line 102. The rear cover 16 is formed with a receiving chamber 161 for receiving the nut 45 and the biasing member 41, and the receiving chamber 161 is provided with a screw thread engaged with the nut 45. The biasing element 41 is disposed between the nut 45 and the outer sleeve 32. In this way, when the user operates the adjustment member 42 to rotate the adjustment member 42 relative to the housing 11, the adjustment member 42 drives the nut 45 to rotate while also driving the nut 45 to move in a direction parallel to the first line 102, so that the degree of compression of the coil spring can be changed to adjust the biasing force of the biasing member 41, thereby achieving adjustment of the striking force of the nailing gun 100.

As shown in fig. 4, the arrows in fig. 4 illustrate the flow of gas in the space formed by the communication of the first chamber 211 and the third chamber 221, and also illustrate that gas can act on the outer sleeve 32.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.

Claims

1. A nailing gun comprising:

a housing;

a nail striking assembly for striking a fastener;

a prime mover disposed within the housing;

a first cylinder;

the first piston is arranged in the first cylinder and fixedly connected with the nail striking assembly, and the first piston also divides the space in the first cylinder into a first chamber and a second chamber;

a second cylinder;

the second piston is arranged in the second cylinder and driven by the prime mover to reciprocate in the second cylinder, the second piston divides the space in the second cylinder into a third chamber and a fourth chamber, and the third chamber is communicated with the first chamber;

the locking assembly is provided with a locking state for locking the nail striking assembly to move relative to the first cylinder and a releasing state for releasing the nail striking assembly to move relative to the first cylinder;

a biasing element for generating a biasing force for urging said locking assembly toward said locked condition;

wherein, when the pressure of the gas in the space formed by the first chamber and the third chamber is greater than a predetermined value when the second piston moves in the direction to reduce the third chamber, the gas in the space acts on the locking assembly and generates a force that drives the locking assembly against the biasing force of the biasing element to the locking assembly to switch the locking assembly to the release state.

2. The nailing gun according to claim 1, wherein:

the nailing gun further includes:

an adjustment member operable by a user to adjust the magnitude of the biasing force of the biasing element against the locking assembly.

3. The nailing gun according to claim 2, wherein:

the preset value is changed along with the change of the magnitude of the biasing force generated by the biasing element on the locking assembly by the adjusting piece.

4. The nailing gun according to claim 1, wherein:

the biasing element is a coil spring.

5. The nailing gun according to claim 1, wherein:

the space formed by the communication of the first chamber and the third chamber is sealed relative to the outside.

6. The nailing gun according to claim 1, wherein:

the locking assembly includes:

the locking piece is used for locking the position of the nail striking component when being contacted and matched with the nail striking component;

the driving piece is biased by the biasing element to drive the locking piece to move towards a position where the locking piece is contacted and matched with the nail striking assembly;

the driving member is at least partially arranged in a space formed by the communication of the first chamber and the third chamber.

7. The nailing gun according to claim 1, wherein:

the drive pin subassembly includes:

a nail hitting pin;

a connecting member for connecting the nailing pin to the first piston;

the nail hitting pin is fixedly connected with the connecting piece or integrally formed;

the locking assembly includes:

an inner sleeve, a groove which radially penetrates through the inner sleeve is formed on the wall of the inner sleeve;

a ball at least partially disposed within the groove;

the outer sleeve is sleeved on the outer side of the inner sleeve and can move between a first position and a second position, when the outer sleeve moves to the first position, the outer sleeve drives the ball to lock the position of the connecting piece, and when the outer sleeve moves to the second position, the ball allows the connecting piece to be separated.

8. The nailing gun according to claim 7, wherein:

the outer sleeve is at least partially positioned in a space formed by the communication of the first chamber and the third chamber.

9. The nailing gun according to claim 7, wherein:

the nailing gun further includes:

a limiting member for limiting the outer sleeve to the second position when the ball releases the connector.

10. The nailing gun according to claim 9, wherein:

the connecting piece can drive the limiting piece to be separated from limiting the outer sleeve when the first piston moves towards the direction of reducing the first cavity.