阅读说明：本技术 一种气动打标针及使用方法 (Pneumatic marking needle and using method ) 是由 侯新军 乔继树 于 2020-06-30 设计创作，主要内容包括：本申请提供一种气动打标针及使用方法,气动打标针包括腔体,腔体的顶部设有进气孔和密封圈；腔体内设有打印针,针棒外部套有弹簧,腔体的底部设有针座限位槽和弹簧限位槽；密封圈的直径小于针座的直径；所述腔体包括密封行程腔体和非密封行程腔体,所述针座与密封行程腔体间隙配合；非密封行程腔体的直径大于针座的直径；所述腔体的底部设有排气孔。本申请通过增加压缩空气对针座的作用距离,增大了打印针的初始动能,提高对气体压缩能的利用率,大大的提升了打印针的冲击力度,增大弹簧压缩势能,提升了打击频率。(The application provides a pneumatic marking needle and a using method thereof, wherein the pneumatic marking needle comprises a cavity, and the top of the cavity is provided with an air inlet and a sealing ring; a printing needle is arranged in the cavity, a spring is sleeved outside the needle rod, and a needle seat limiting groove and a spring limiting groove are arranged at the bottom of the cavity; the diameter of the sealing ring is smaller than that of the needle seat; the cavity comprises a sealing stroke cavity and a non-sealing stroke cavity, and the needle seat is in clearance fit with the sealing stroke cavity; the diameter of the non-sealing stroke cavity is larger than that of the needle seat; and the bottom of the cavity is provided with an exhaust hole. This application is through increasing the functioning distance of compressed air to the needle file, has increased the initial kinetic energy of printing needle, improves the utilization ratio to the gas compression energy, great promotion the impact dynamics of printing needle, increase spring compression potential energy has promoted the strike frequency.)

1. The utility model provides a pneumatic marking needle which characterized in that: the air-permeable sealing device comprises a cavity (1), wherein an air inlet hole and a sealing ring (3) are arranged at the top of the cavity (1), and a pinhole is arranged at the bottom of the cavity (1); a printing needle is arranged in the cavity (1), the printing needle comprises a needle seat (2) and a needle bar (7), the needle bar (7) is arranged at the bottom of the needle seat (2), a spring (4) is sleeved outside the needle bar (7), and a needle seat limiting groove (10) and a spring limiting groove (11) are arranged at the bottom of the cavity (1); the diameter of the sealing ring (3) is smaller than that of the needle seat (2); the cavity (1) comprises a sealing stroke cavity (8) and a non-sealing stroke cavity (9), the sealing stroke cavity (8) and the non-sealing stroke cavity (9) are communicated from top to bottom along the height direction of the cavity (1), and the needle seat (2) is in clearance fit with the sealing stroke cavity (8); the diameter of the non-sealing stroke cavity (9) is larger than that of the needle seat (2); the bottom of the cavity is provided with an exhaust hole (6).

2. The pneumatic marking pin of claim 1, wherein: the non-sealing stroke cavity is characterized in that an exhaust groove (5) is formed in the circumference of the non-sealing stroke cavity (9), the exhaust groove (5) extends along the height direction of the cavity (1), and the diameter of the exhaust groove (5) is larger than that of the needle seat (2).

3. The pneumatic marking pin of claim 2, wherein: the number of the exhaust grooves (5) is multiple, and the exhaust grooves (5) are uniformly distributed at intervals along the circumferential direction of the non-sealing stroke cavity (9).

4. The pneumatic marking pin of claim 1, wherein: the bottom of the needle seat (2) is provided with a boss, and the diameter of the boss is smaller than that of the needle seat (2) and larger than that of the needle rod (7); the upper end of the needle bar (7) is fixed at the bottom of the boss, the upper end of the spring (4) is fixed on the boss, and the lower end of the spring (4) is sleeved on the needle bar (7).

5. The pneumatic marking pin of claim 1, wherein: the exhaust hole (6) is arranged at the upper part of the spring limiting groove (11).

6. The pneumatic marking pin of claim 1, wherein: the number of exhaust holes (6) is a plurality of, and a plurality of exhaust holes (6) are evenly distributed at intervals along the circumference of the cavity (1).

7. The pneumatic marking pin of claim 1, wherein: the needle seat limiting groove (10) is arranged at the bottom of the non-sealing stroke cavity (9).

8. The pneumatic marking pin of claim 1, wherein: the upper end of the cavity (1) is provided with an inner wall groove, and the sealing ring (3) is arranged in the inner wall groove.

9. The pneumatic marking pin of claim 1, wherein: the diameter of the needle seat limiting groove (10) is smaller than that of the needle seat (2), and the diameter of the spring limiting groove (11) is smaller than that of the spring (4).

10. A method of using a pneumatic marking pin according to any of claims 1 to 9, comprising the steps of:

firstly, sleeving a spring on a needle bar and fixing the spring on a boss at the bottom of a needle base;

penetrating the printing needle with the spring installed into the cavity, and clamping the needle seat through a sealing ring installed in the cavity to prevent the printing needle from popping out of the cavity;

injecting compressed air from an air inlet hole at the top of the cavity, and pushing the needle seat to move forwards by the compressed air;

step four, when the needle seat is separated from the sealing ring and enters the sealing stroke cavity, the needle seat is still pushed by compressed air to continue accelerating forward movement due to the fact that the needle seat is tightly matched with the inner side wall of the sealing stroke cavity, and the bottom of the spring reaches the spring limiting groove and is compressed;

step five, when the needle seat continues to move downwards to exceed the sealing stroke cavity and reach the non-sealing stroke cavity, the compressed air reaches the lower part of the needle seat through the exhaust groove and is communicated with the atmosphere through the exhaust hole below the cavity, and the driving force is lost; at the moment, the printing needle is mainly driven by the elastic force in the reverse direction of the spring to push the printing needle to return to the original position, and the high-frequency vibration of the printing needle in the cavity is realized by repeating the steps.

Technical Field

The application relates to the technical field of pneumatic marking, in particular to a pneumatic marking needle and a using method thereof.

Background

The pneumatic marking needle is a marking device equipped on the existing pneumatic marking machine, the pneumatic marking needle realizes high-frequency vibration to complete marking in a mode of driving a marking needle compression spring by compressed air in principle, and a main sealing mode is realized by matching a needle seat and a sealing ring.

Disclosure of Invention

To the problem that exists among the prior art, this application provides a pneumatic marking needle and application method to reach the initial kinetic energy that has increased the printing needle, improve the utilization ratio to the gas compression energy, promoted the impact dynamics of printing needle, increase spring compression potential energy, promoted the beneficial effect of striking frequency.

The application provides a pneumatic marking needle, which comprises a cavity, wherein the top of the cavity is provided with an air inlet and a sealing ring, and the bottom of the cavity is provided with a needle hole; a printing needle is arranged in the cavity and comprises a needle seat and a needle bar, the needle bar is arranged at the bottom of the needle seat, a spring is sleeved outside the needle bar, and a needle seat limiting groove and a spring limiting groove are arranged at the bottom of the cavity; the diameter of the sealing ring is smaller than that of the needle seat; the cavity comprises a sealing stroke cavity and a non-sealing stroke cavity, the sealing stroke cavity and the non-sealing stroke cavity are communicated from top to bottom along the height direction of the cavity, and the needle seat is in clearance fit with the sealing stroke cavity; the diameter of the non-sealing stroke cavity is larger than that of the needle seat; and the bottom of the cavity is provided with an exhaust hole.

Preferably, the circumference of the non-sealing stroke cavity is provided with an exhaust groove, the exhaust groove extends along the height direction of the cavity, and the diameter of the exhaust groove is larger than that of the needle seat.

Preferably, the number of the exhaust grooves is multiple, and the exhaust grooves are uniformly distributed at intervals along the circumferential direction of the non-sealing stroke cavity.

Preferably, the bottom of the needle seat is provided with a boss, and the diameter of the boss is smaller than that of the needle seat and larger than that of the needle rod; the upper end of the needle bar is fixed at the bottom of the boss, the upper end of the spring is fixed on the boss, and the lower end of the spring is sleeved on the needle bar.

Preferably, the exhaust hole is arranged at the upper part of the spring limiting groove.

Preferably, the number of the exhaust holes is multiple, and the exhaust holes are uniformly distributed at intervals along the circumferential direction of the cavity.

Preferably, the needle seat limiting groove is arranged at the bottom of the non-sealing stroke cavity.

Preferably, the upper end of the cavity is provided with an inner wall groove, and the sealing ring is arranged in the inner wall groove.

Preferably, the diameter of the needle seat limiting groove is smaller than that of the needle seat, and the diameter of the spring limiting groove is smaller than that of the spring.

A use method of a pneumatic marking needle comprises the following steps:

firstly, sleeving a spring on a needle bar and fixing the spring on a boss at the bottom of a needle base;

penetrating the printing needle with the spring installed into the cavity, and clamping the needle seat through a sealing ring installed in the cavity to prevent the printing needle from popping out of the cavity;

injecting compressed air from an air inlet hole at the top of the cavity, and pushing the needle seat to move forwards by the compressed air;

step four, when the needle seat is separated from the sealing ring and enters the sealing stroke cavity, the needle seat is still pushed by compressed air to continue accelerating forward movement due to the fact that the needle seat is tightly matched with the inner side wall of the sealing stroke cavity, and the bottom of the spring reaches the spring limiting groove and is compressed;

step five, when the needle seat continues to move downwards to exceed the sealing stroke cavity and reach the non-sealing stroke cavity, the compressed air reaches the lower part of the needle seat through the exhaust groove and is communicated with the atmosphere through the exhaust hole below the cavity, and the driving force is lost; at the moment, the printing needle is mainly driven by the elastic force in the reverse direction of the spring to push the printing needle to return to the original position, and the high-frequency vibration of the printing needle in the cavity is realized by repeating the steps.

The beneficial effect of this application lies in:

the application provides a pneumatic marking needle and application method, adopts inseparable clearance fit with the cooperation between needle file and the needle chamber, when not influencing the motion of needle file in the needle chamber, plays sealed effect through the fit clearance that has reduced between needle file and the needle chamber, and in sealed stroke, the printing needle can receive compressed air's promotion always, for the impact of printing needle lasts holds power, increases the kinetic energy of impact. According to the application, the acting distance of compressed air on the needle seat is increased, the initial kinetic energy of the printing needle is increased, the utilization rate of gas compression energy is improved, the impact force of the printing needle is greatly improved, the compression potential energy of the spring is increased, and the striking frequency is improved; meanwhile, the sealing mode is changed from the sealing mode of the needle seat and the sealing ring into the matching sealing of the needle seat and the needle cavity, the influence of the sealing ring on the sealing effect in machining precision and environment temperature is avoided, and the stability of the equipment and the adaptability of the equipment in severe environment are greatly improved.

In addition, the design principle of the application is reliable, the structure is simple, and the application prospect is very wide.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic perspective view of a pneumatic marking pin according to an embodiment of the present application.

Fig. 2 is a front view of a pneumatic marking pin according to an embodiment of the present disclosure.

Fig. 3 is a schematic sectional view of the pneumatic marking pin in fig. 2 in an initial state.

FIG. 4 is a schematic cross-sectional view of the pneumatic marking pin of FIG. 2 in a compressed state.

In the figure, the needle comprises a cavity 1, a cavity 2, a needle seat 3, a sealing ring 4, a spring 5, an exhaust groove 6, an exhaust hole 7, a needle rod 8, a sealing stroke cavity 9, a non-sealing stroke cavity 10, a needle seat limiting groove 11 and a spring limiting groove.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The following explains key terms appearing in the present application.

The application provides a pneumatic marking needle, including cavity 1, as shown in fig. 1 and 2, the cavity wholly becomes the toper structure. The top of cavity 1 is equipped with inlet port and sealing washer 3, specifically, the upper end of cavity 1 is equipped with interior wall slot, and sealing washer 3 sets up in interior wall slot.

Compressed air enters the interior of the chamber 1 through the inlet holes. Be equipped with the printing needle in the cavity 1, the printing needle includes needle file 2 and needle stick 7, and needle file 2 and needle stick 7 all adopt cylindric structure. The needle bar 7 is arranged at the bottom of the needle seat 2, and the needle seat 2 and the needle bar 7 are pressed into a whole through interference fit. A needle hole is formed in the bottom of the cavity 1, and a needle bar 7 penetrates through the needle hole to print; the needle bar 7 is externally sleeved with a spring 4.

The bottom of the needle base 2 is provided with a cylindrical boss, and the diameter of the boss is smaller than that of the needle base 2 and larger than that of the needle rod 7; the upper end of the needle bar 7 is fixed at the bottom of the boss, the upper end of the spring 4 is fixed on the boss, and the lower end of the spring 4 is sleeved on the needle bar 7.

The bottom of the cavity 1 is provided with a needle stand limiting groove 10 and a spring limiting groove 11; the diameter of the needle seat limiting groove 10 is smaller than that of the needle seat 2, and the needle seat limiting groove 10 is used for limiting the downward moving position of the needle seat; the diameter of the spring limiting groove 11 is smaller than that of the spring 4, and the spring limiting groove 11 is used for limiting the moving position of the lower end of the spring 4.

The diameter of sealing washer 3 is less than the diameter of needle file 2, and sealing washer 3 is used for blocking needle file 2, prevents that the printing needle from popping out cavity 1. The cavity 1 comprises a sealing stroke cavity 8 and a non-sealing stroke cavity 9, and the cross sections of the sealing stroke cavity 8 and the non-sealing stroke cavity 9 are circular and are communicated with each other from top to bottom along the height direction of the cavity 1. In this embodiment, the diameter of sealing stroke cavity 8 slightly is less than the diameter of needle file 2, and the inside wall of needle file 2 and sealing stroke cavity 8 is inseparable clearance fit, and the size in concrete clearance satisfies as follows: when the needle seat 2 moves on the inner side wall of the sealing stroke cavity 8, the compressed air cannot flow out of the gap between the two.

The diameter of the non-sealing stroke cavity 9 is larger than that of the needle seat 2, the bottom of the cavity is provided with an exhaust hole 6, the exhaust hole 6 is arranged on the upper portion of the spring limiting groove 11, and the needle seat limiting groove 10 is arranged at the bottom of the non-sealing stroke cavity 9. When the needle seat 2 moves on the inner side wall of the non-sealing stroke cavity 9, a gap is reserved between the two ends of the needle seat 2 and the inner side wall of the non-sealing stroke cavity 9, and compressed air can flow out through the gap and is communicated with the atmosphere through the exhaust hole 6.

In this embodiment, the number of the exhaust holes 6 is four, and the four exhaust holes are uniformly distributed at intervals along the circumferential direction of the cavity 1. In other embodiments, the number of the exhaust holes 6 can be set according to actual requirements.

An exhaust groove 5 is formed in the circumference of the non-sealing stroke cavity 9, the exhaust groove 5 extends along the height direction of the cavity 1, and the diameter of the exhaust groove 5 is larger than that of the needle seat 2. When the needle seat 2 moves on the inner side wall of the non-sealing stroke cavity 9, compressed air is communicated with the atmosphere through the exhaust groove 5 and the exhaust hole 6 in sequence, the force is removed, the elastic force of the spring is larger than the air driving force at the moment, the printing needle is decelerated and provides power for the return needle, the printing needle is driven to return to the sealing stroke, and the force is stored for next needle discharging.

In this embodiment, the number of the exhaust grooves 5 is four, and the four exhaust grooves 5 are uniformly distributed at intervals along the circumferential direction of the non-sealing stroke cavity 9. In other embodiments, the number of the exhaust slots 5 can be set according to actual requirements.

The application provides a using method of a pneumatic marking needle, which comprises the following steps:

firstly, sleeving a spring on a needle bar and fixing the spring on a boss at the bottom of a needle base;

penetrating the printing needle with the spring installed into the cavity, and clamping the needle seat through a sealing ring installed in the cavity to prevent the printing needle from popping out of the cavity;

injecting compressed air from an air inlet hole at the top of the cavity, and pushing the needle seat to move forwards by the compressed air;

step four, when the needle seat is separated from the sealing ring and enters the sealing stroke cavity, the needle seat is still pushed by compressed air to continue accelerating forward movement due to the fact that the needle seat is tightly matched with the inner side wall of the sealing stroke cavity, and the bottom of the spring reaches the spring limiting groove and is compressed;

step five, when the needle seat continues to move downwards to exceed the sealing stroke cavity and reach the non-sealing stroke cavity, the compressed air reaches the lower part of the needle seat through the exhaust groove and is communicated with the atmosphere through the exhaust hole below the cavity, and the driving force is lost; at the moment, the printing needle is mainly driven by the elastic force in the reverse direction of the spring to push the printing needle to return to the original position, and the high-frequency vibration of the printing needle in the cavity is realized by repeating the steps.

As shown in fig. 4, the arrow direction in the figure is the flow direction of the compressed air, when the compressed air enters the cavity 1, the compressed air pushes the needle base 2 to move forward, at this time, the needle base 2 is separated from the sealing ring 3, but because the sealing stroke 8 of tight fit is reserved between the needle cavity 1 and the needle base 2, the needle base 2 is still pushed by the compressed air to continue accelerating forward movement, the impact kinetic energy is continued to be increased, and meanwhile, the spring 4 is compressed to accumulate the kinetic energy required by needle return; when the needle seat 2 moves beyond the sealing stroke 8 to reach the exhaust groove 5; at the moment, compressed air reaches the lower part of the needle seat 2 through the exhaust groove 5 and is communicated with the atmosphere through the exhaust hole 6 below the needle cavity 1, and the driving force is lost; at the moment, the printing needle is mainly driven by the elastic force in the reverse direction of the spring 4 to push the printing needle to return to the original position, and the high-frequency vibration of the printing needle in the needle cavity 1 is realized by repeating the steps. When the marking device drives the marking needle to move on the surface of the workpiece according to the set track, continuous dot matrix characters or numbers are left on the surface of the workpiece, and the marking function is realized.

The application provides a pneumatic marking needle and application method, adopts inseparable clearance fit with the cooperation between needle file and the needle chamber, when not influencing the motion of needle file in the needle chamber, plays sealed effect through the fit clearance that has reduced between needle file and the needle chamber, and in sealed stroke, the printing needle can receive compressed air's promotion always, for the impact of printing needle lasts holds power, increases the kinetic energy of impact. According to the application, the acting distance of compressed air on the needle seat is increased, the initial kinetic energy of the printing needle is increased, the utilization rate of gas compression energy is improved, the impact force of the printing needle is greatly improved, the compression potential energy of the spring is increased, and the striking frequency is improved; meanwhile, the sealing mode is changed from the sealing mode of the needle seat and the sealing ring into the matching sealing of the needle seat and the needle cavity, the influence of the sealing ring on the sealing effect in machining precision and environment temperature is avoided, and the stability of the equipment and the adaptability of the equipment in severe environment are greatly improved.

Although the present application has been described in detail with reference to the accompanying drawings in conjunction with the preferred embodiments, the present application is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present application by those skilled in the art without departing from the spirit and scope of the present application, and these modifications or substitutions are intended to be covered by the present application/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.