KR102207845B1 - Pneumatic strike device using multiple cylinders - Google Patents

Abstract

The present invention relates to a pneumatic striking apparatus using multiple cylinders. More specifically, the present invention relates to a pneumatic striking apparatus using multiple cylinders, which configures a piston and cylinders in a multi-structure to pressurize air by compressing the air by a first piston, then compressing the air further by a second piston, thereby greatly increasing the striking strength for striking an object. The pneumatic striking apparatus using multiple cylinders comprises: an air storage unit which includes an air tank, which is filled with compressed air, first pressurizing holes formed on the air tank and the central part of the air tank, and a spool valve formed on an upper side of the first pressurizing holes to rise or fall; a first cylinder unit which includes a first cylinder formed on a lower side of the air storage unit to have the air pressurized and injected from the air storage unit, a first piston which is installed in the first cylinder to have a second pressurizing hole formed on the central part, and a rear cushion installed on a part which is on the rear side of the first piston and a rear end unit of the first cylinder; a second cylinder unit which includes a second cylinder which is formed on a lower side of the first cylinder unit to have the air pressurized and injected from the first cylinder unit, a second piston which is installed in the second cylinder, a spring installed on the front side of the second piston, and a front cushion formed in a part which is on the front side of the second piston and a front end unit of the second cylinder; and an air injection unit which includes an injection hole formed on the rear side of the spool valve, an air hose engaged with the injection hole, and a compressor coupled with the air hose to inject or exhaust the air.

Description

Pneumatic strike device using multiple cylinders

The present invention relates to a pneumatic strike device using a multi-cylinder, and in detail, a piston and a cylinder are configured in a multi-structure to pressurize air so that the first piston pushes the second piston and the air simultaneously pushes the second piston. It relates to a pneumatic striking device using a multi-cylinder in which the striking strength of striking an object is greatly increased by pressing.

In general, a striking device is a device that receives air pressure generated from a compressor, makes a reciprocating piston motion in a certain section, and applies an impact to an object using this.

That is, when compressed air supplied from the outside is supplied to the inside of the cylinder, the piston inside the cylinder is operated in such a manner as to apply a blow to the external object colliding with the piston while repeatedly linearly moving back and forth.

As a technology related to such a striking device, Korean Patent Registration No. 10-0357699 is disclosed.

The prior art relates to a vibration generating device configured such that a piston is repeatedly conveyed back and forth by air introduced or discharged into a cylinder so that an object coupled to the piston can be vibrated; A relatively large diameter pressure slide part is continuously formed at the rear end of the rod part having a certain length, and an air guide hole having an air inlet hole through which air is introduced and an air discharge hole through which air is discharged is opened at the rear end. A piston formed in the center of the end portion of the pressure slide part so that an air chamber communicates with the air guide hole; The pressure slide guide hole, which is sealed at the rear end of which the pressure slide part of the piston is inserted and slides, is formed to communicate with the through rod guide hole through which the rod part is inserted and slides, and the air inlet hole through which air is introduced communicates with the outside. The rod guide hole is formed so that the air discharge hole through which air is discharged communicates with the outside, and an air discharge guide hole for guiding the air to the air discharge hole is formed around the inner circumferential surface coinciding with the air discharge hole. To do.

However, the prior art is a single circuit structure that operates by reciprocating movement between the forward and reverse ports while operating with the primary pressure for the reverse and the secondary pressure for the forward, and the secondary pressure is supplied after reaching the exhaust port with the secondary pressure when moving forward. It is discharged at the same time as it is blocked, and the blocked secondary pressure is rapidly reduced, and then the forward acceleration of the port and collision with the impact object. The reciprocating stroke becomes shorter and shorter.

Therefore, as the pressure drop and the distance of the reciprocating stroke are shortened, the impact strength for hitting the object in front is reduced, thereby increasing the working time by performing repeated strikes.

Korean Patent Registration No. 10-0357699 (announcement date 2002.10.25)

The present invention is composed of a first cylinder part and a second cylinder part in series so that the first piston is pressed by pneumatic pressure to push the second piston, and at the same time, the air is pressurized to the second cylinder part by the second pressurizing hole to thereby generate the second piston. It is intended to solve the problem of increasing the working time by repeatedly hitting the target by hitting the target by the increased hitting strength by pushing it, so that the impact can be applied to the target with a single hit without repeated hitting.

In addition, a sufficient stroke distance is secured by discharging residual pressure remaining in the first and second cylinders through the first and second exhaust holes, and returning the first and second pistons to the positions before the strike by the spring. As a result, it is possible to generate a constant hitting strength, thereby solving the problem of reducing the hitting strength by repeated hits.

The problem to be solved of the present invention is not limited to the problems mentioned above, and other technical problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

A pneumatic strike device using multiple cylinders of the present invention for achieving the problem to be solved above,

An air storage unit including an air tank filled with compressed air, a first pressurization hole formed at a central portion of the air tank and the air tank, and a spool valve that is formed above the first pressurization hole and is raised or lowered;

The first cylinder is formed under the air storage unit, and air is pressurized from the air storage unit, and the first piston is installed inside the first cylinder and has a second pressurized hole formed at the center thereof, and is behind the first piston. A first cylinder unit including a rear cushion installed at a rear end of the first cylinder;

A second cylinder formed under the first cylinder part and into which air is injected by pressure from the first cylinder part, a second piston installed inside the second cylinder, a spring installed in front of the second piston, and the second cylinder A second cylinder part including a front cushion formed in front of the second piston and formed at a front end of the second cylinder;

And an air injection unit including an injection hole formed at the rear of the spool valve, an air hose coupled to the injection hole, and a compressor coupled to the air hose to inject or exhaust air.

The first cylinder portion further includes first exhaust holes formed in a horizontal direction on both front sides of the first cylinder,

The second cylinder part further includes a second exhaust hole formed in a longitudinal direction in front of the second cylinder,

The first exhaust hole and the second exhaust hole discharge air remaining in the first and second cylinders to the outside after the blow is performed.

A separation plate is formed between the first cylinder part and the second cylinder part,

The first cylinder and the second cylinder are separated by the separating plate to form a space inside each.

The spool valve includes a sealing portion for sealing the first pressurized hole and a valve portion formed around the sealing portion.

The spool valve is lowered toward the first pressurized hole when air is injected, and the valve part is constricted toward the sealing part by air pressure, so that air is injected into the inside of the air tank,

After the air injection is completed, the spool valve is raised by the exhaust pressure generated when the compressor exhausts the air remaining in the injection hole, and the first pressurizing hole is opened to pressurize the air inside the air tank to the first cylinder. Is injected.

The second pressurizing hole is formed by a pair of guide shafts inside the first cylinder, and the first piston is coupled to the guide shaft and guided upward and downward.

Through the present invention, the first cylinder is configured in series with the second cylinder, so that the first piston is pressed by pneumatic pressure to push the second piston, and at the same time, the air is pressurized to the second cylinder by the second pressing hole. The work time can be shortened as the impact can be applied to the object with a single blow without repeated hits by hitting the object with the increased hitting strength by pushing out

In addition, a sufficient stroke distance is secured by discharging residual pressure remaining in the first and second cylinders through the first and second exhaust holes, and returning the first and second pistons to the positions before the strike by the spring. So that the impact strength can be preserved.

1A is a cross-sectional view showing a pneumatic strike device using multiple cylinders according to an example of the present invention.
1B is a flowchart illustrating an operation of a pneumatic strike device using multiple cylinders according to an example of the present invention.
2A is a perspective view showing a first piston of a pneumatic strike device using multiple cylinders according to an example of the present invention.
FIG. 2B is a diagram showing the EE cross-section of FIG. 2A.
3A is a perspective view showing a second piston of a pneumatic strike device using multiple cylinders according to an example of the present invention.
FIG. 3B is a diagram showing a cross-section FF of FIG. 3A.
4A is a perspective view showing a spool valve of a pneumatic strike device using multiple cylinders according to an example of the present invention.
Fig. 4B is a diagram showing a cross section GG of Fig. 4A.
5 is a cross-sectional view showing an air tank of a pneumatic strike device using a multi-cylinder according to an example of the present invention, and housings of the first and second cylinders.
6A is a cross-sectional view showing a state in which a second pressing hole is formed as a guide shaft.
6B is an operation flowchart of FIG. 6A.

Before describing the embodiments of the present invention in detail, it should be noted that the embodiments of the present invention are provided to completely describe the present invention to those of ordinary skill in the art.

Accordingly, the claims of the present invention are not limited by the following examples and drawings.

In addition, the drawings in the present specification are intended to make the description by reference in the drawings clearly understandable, and thus there are some exaggerated parts. Accordingly, there may be differences between the drawings shown in the present invention and the actual product.

Hereinafter, the present invention will be described with reference to the drawings. However, after an overview of the pneumatic strike device using multiple cylinders with reference to FIGS. 1A and 1B so that the description of the present invention may be concise and clear, pneumatic strike using multiple cylinders with reference to FIGS. 2A to 6B The components of the device will be described in detail.

1A is a perspective view of a pneumatic striking device using multiple cylinders according to an embodiment of the present invention, and FIG. 1B is an operation flowchart of the pneumatic striking device using multiple cylinders of FIG. 1A.

The pneumatic strike device using a multi-cylinder according to an example of the present invention presses and pushes the first piston 23 by the air pressure of the air inputted by the compressor, and the first piston 23 and the second pressure hole 231 are used. Pressurized air pressurizes and pushes the second piston 33 to hit the object in front of the second piston 33.

In addition, after the air remaining inside the cylinder after being hit by the first exhaust hole 27 and the second exhaust hole 39 formed in the first cylinder 21 and the second cylinder 31 is exhausted, By returning the first piston and the second piston 33 to the position before the strike by the spring 35 formed in front of the piston 33, a sufficient stroke distance can be secured to preserve the strike strength.

Such a pneumatic strike device using multiple cylinders includes an air storage unit 10, a first cylinder unit 20, a second cylinder unit 30, and an air injection unit.

Hereinafter, components constituting the pneumatic strike device using multiple cylinders will be described in detail with reference to FIGS. 2A to 6B.

The air storage unit 10 may be formed in the uppermost part of the pneumatic strike device 1 of the present invention. The air storage unit 10 may store air input by a compressor to be described later and pressurize the air to the first cylinder unit 20 to be described later.

The air storage unit 10 includes an air tank 11, a first pressurization hole 13, and a spool valve 15.

The air tank 11 may be a housing in which air is stored. The air tank 11 may store air injected by a compressor to be described later.

The pressure of the air filled inside the air tank 11 may be the same as the pressure input from the compressor.

The air tank 11 may be formed with a volume capable of supplying air of sufficient pressure to the first cylinder 21 and the second cylinder 31 to be described later.

A first pressurizing hole 13 may be formed in the central portion of the air tank 11. The first pressurization hole 13 may pressurize the air injected into the air tank 11 with a first cylinder 21 to be described later. That is, the first pressurization hole 13 may be a passage through which air is moved. The first pressurization hole 13 may be a communication pore penetrating the central portion of the air tank 11.

A spool valve 15 may be installed at the rear of the air tank 11. At the rear of the air tank 11, a spool valve 15 may be installed and a spool valve installation portion capable of being raised and lowered may be formed.

The spool valve 15 may be a circular rubber valve. The spool valve 15 may include a sealing portion for sealing the first pressing hole 13 and a valve portion formed around the sealing portion.

The valve portion of the spool valve 15 may be formed of a soft material and strength.

Accordingly, when air is injected into the air tank 11 by a compressor, which will be described later, the valve portion is constricted toward the sealing portion and air can be smoothly injected.

When air is injected from the inside of the spool valve installation part, the spool valve 15 is lowered toward the first pressurized hole 13 and the valve part is retracted toward the sealing part by air pressure, allowing air to be injected into the inside of the air tank 11 and injecting air. After completion of the process, the spool valve 15 is raised by the exhaust pressure generated when the compressor exhausts the air remaining in the injection hole 40, and the first pressurizing hole 13 is opened to open the air tank ( 11) Air from the inside may be pressurized and injected into the first cylinder part 20.

That is, the spool valve 15 may open or close the first pressurization hole 13 by rising and falling. When the air is injected by the compressor, the spool valve 15 descends forward (in the direction of the first pressurization hole) to seal the first pressurization hole 13 and at the same time, the valve portion is constricted to prevent air inside the air tank 11. When the air supply is cut off and the compressor exhausts the air remaining in the injection hole 40 to be described later, the spool valve 15 is raised by the exhaust pressure and retracted to the rear. ) Is opened so that the air in the air tank 11 can be pressurized by the first cylinder part 20 to be described later.

A first cylinder part 20 may be formed in front of the air storage part 10.

The first cylinder unit 20 includes a first cylinder 21 to which air is pressurized and injected from the air storage unit 10, and a first piston 23 and a first piston 23 installed inside the first cylinder 21. ) And may include a rear cushion 25 installed at the rear end of the first cylinder 21.

The first cylinder 21 may be formed in front of the air tank 11. A space may be formed inside the first cylinder 21. A first piston 23 to be described later may be provided in the space portion of the first cylinder 21. Accordingly, a reciprocating motion in which the first piston 23 is pushed forward or returned inside the space portion of the first cylinder 21 may be possible.

The first cylinder 21 may be in communication with the first pressing hole 13. That is, it may be a communication pore connecting the air tank 11 and the first cylinder 21.

Air that is pressurized and injected through the first pressing hole 13 may be injected into the inside of the first cylinder 21. That is, the air pressurized and injected through the first pressurizing hole 13 can push the first piston 23 provided inside the first cylinder 21 forward through the air pressure. Accordingly, the first piston 23 can push the second piston 33 to be described later.

A first piston 23 may be provided inside the first cylinder 21. The first piston 23 may be formed of an upper surface portion having a wide contact area with the pressurized air and a striking portion for pushing the second piston 33 to be described later.

The upper surface portion is formed with a diameter corresponding to the diameter of the space portion of the first cylinder 21, and the striking portion is formed to be smaller than the diameter of the upper surface portion, but has a diameter capable of exhibiting sufficient strength to push the second piston 33 to be described later. It is preferably formed.

A second pressing hole 231 penetrating from the top to the bottom may be formed in the center of the first cylinder 21.

When the first piston 23 is pressed downward, the second pressing hole 231 may push the second piston 33 and simultaneously inject air into the second cylinder 31. That is, the second piston 33 can be pushed out with a force that the first piston 23 is pressed and simultaneously pushed out with pneumatic pressure. Accordingly, the force for pressing the second piston 33 is increased, and as a result, the pneumatic striking device 1 can increase the striking strength for striking the object.

A rear cushion 25 may be provided at the rear end of the first piston 23 and at the rear end of the first cylinder 21. The rear cushion 25 may be a rubber cushion.

The rear cushion 25 prevents the first piston 23 from being damaged by repeated return by contacting the rear portion of the first piston 23 when it is restored after being pressed forward and hitting the first piston 23. can do.

First exhaust holes 27 may be formed at both front sides of the first cylinder 21.

The first exhaust hole 27 may be formed as a long hole in the horizontal direction at both sides of the first cylinder 21.

The first exhaust hole 27 may exhaust air remaining inside the first cylinder 21 after the first piston 23 is hit forward by air pressure to the outside. Accordingly, the pressure inside the first cylinder 21 is lost, so that the first piston 23 can be smoothly returned to its original position.

A second cylinder part 30 may be formed under the first cylinder part 20.

The second cylinder unit 30 includes a second cylinder 31 to which air is pressurized and injected from the first cylinder unit 20, and a second piston 33 and a second piston installed inside the second cylinder 31. It may include a spring 35 installed in front of 33) and a front cushion 37 installed in the front end of the second cylinder 31 while being in front of the second piston 33.

The second cylinder 31 may be formed in front of the first cylinder part 20. A space portion may be formed inside the second cylinder 31. A second piston 33 to be described later may be provided in the space portion of the second cylinder 31. Accordingly, a reciprocating motion in which the second piston 33 is pushed forward or returned inside the space portion of the second cylinder 31 may be possible.

A second piston 33 may be provided inside the second cylinder 31. The second piston 33 is the same as the first piston 23 described above, the object in front of the second piston 33 and the upper surface of which the contact area with the air pressurized from the first cylinder 20 is wide It may be formed as a striking part to hit.

A spring 35 may be installed inside the second cylinder 31 and in front of the second piston 33. In the spring 35, after the second piston 33 is hit forward by the first piston 23 and pressurized air, the pressure inside the second cylinder 31 is reduced by a second exhaust hole 39 to be described later. If it is lost, it can be restored to the position before the hit by the elastic restoring force of the spring 35.

A front cushion 37 may be provided in front of the second piston 33 and at a front end of the second cylinder 31. The front cushion 37 may be a rubber cushion.

The front cushion 37 can prevent the second piston 33 from being damaged by repeated strikes by contacting the front portion of the second piston 33 when the second piston 33 is pressed and hits forward. have.

A second exhaust hole 39 may be formed in front of the second cylinder 31. The second exhaust hole 39 may be a front end portion of the second cylinder 31 and may be formed as long holes in the longitudinal direction on both sides of the striking portion of the second piston 33.

The second exhaust hole 39 may exhaust air remaining inside the second cylinder 31 to the outside after the second piston 33 is hit forward by air pressure. Accordingly, the pressure inside the second cylinder 31 is lost, so that the second piston 33 can be smoothly returned to its original position.

A separating plate may be formed between the first cylinder part 20 and the second cylinder part 30. In other words, a separation plate may be formed so that the first cylinder 21 and the second cylinder 31 may each have an inner space.

A through hole is formed in the central portion of the separating plate, and after the hitting portion of the first piston 23 is inserted through the through hole of the separating plate, it may contact the upper surface of the second piston 33.

The first cylinder unit 20 and the second cylinder unit 30 may be connected in series. Therefore, it is possible to configure the pneumatic strike device 1 using multiple cylinders capable of exerting the required strike strength by additionally configuring another cylinder and a piston in front of the second cylinder part 30.

In this case, in the second cylinder part 30, a second pressing hole 231 identical to the first cylinder part 20 may be formed in the center of the second cylinder 31.

An air injection unit may be formed at the rear of the spool valve 15 of the air storage unit 10.

The air injection unit is combined with the injection hole 40 formed at the rear of the spool valve 15 and the air hose and the air hose coupled to the injection hole 40 to inject air into the inside of the air tank 11 or 40) It may include a compressor capable of exhausting the remaining air inside.

The injection hole 40 may be formed at the rear of the spool valve installation portion in which the spool valve 15 is installed. The injection hole 40 may be a communication hole through which air passes. Accordingly, air injected under pressure from a compressor to be described later may pass through the spool valve 15 through the injection hole 40 and be injected into the air tank 11.

An air hose may be coupled to the rear end of the injection hole 40. The air hose may move air injected from a compressor to be described later to the injection hole 40.

A compressor may be provided at one end of the air hose.

The compressor can inject or exhaust air.

The compressor can be applied with a solenoid valve. The solenoid valve can inject air when a signal is input, and exhaust when the signal is blocked.

6A to 6B, in another embodiment of a pneumatic strike device using multiple cylinders according to an example of the present invention, the second pressurization hole 231 of the first cylinder part 20 is the first cylinder 21 It may be formed with a pair of guide shafts 233 on the inside of the.

The guide shaft 233 may be a communication pore that penetrates from the first cylinder 21 to the second cylinder 31 in the same manner as the second pressurization hole 231.

The first piston 23 may be coupled to the guide shaft 233 to be guided upward and downward. That is, a pair of insertion holes that can be coupled to the guide shaft 233 to be guided are formed in the first piston 23, and the guide shaft 233 is inserted through the insertion hole to guide the first piston 23. It is coupled to the shaft 233 and can be guided up and down.

Hereinafter, a driving process of a pneumatic strike device using multiple cylinders will be described in detail with reference to FIGS. 1A to 5.

The pneumatic strike device 1 can be deformed or crushed by striking the object in front.

In the pneumatic strike device 1, when an input signal is input to a solenoid valve applied to the compressor, the compressor starts injecting air.

Air injected by the compressor may move to the spool valve 15 through the air hose and the injection hole 40.

In the spool valve 15, the valve portion is constricted toward the central portion by the injected air pressure, through which air is injected into the air tank 11.

When enough air is injected into the air tank 11 to form air pressure equal to the design value, the solenoid valve blocks the input signal. Accordingly, the compressor stops air injection and exhausts the air remaining inside the injection hole 40.

At this time, an exhaust pressure is generated inside the injection hole 40 and the spool valve 15 is retracted to the rear by the generated exhaust pressure.

As the spool valve 15 is retracted to the rear, the first pressurization hole 13 is opened and the air injected into the air tank 11 is rapidly transferred to the first cylinder 21 through the first pressurization hole 13 Will be pressurized.

The air pressurized by the first cylinder (21) pushes the first piston (23) and at the same time is pressurized through the second pressing hole (231) formed in the center of the first piston (23) to the second cylinder (31). It can be injected under pressure.

That is, the second piston 33 combines the force pushed by the first piston 23 and the force pushed by the pressurized air injected into the second cylinder 31 through the second pressing hole 231. It can hit the target of.

At this time, the second piston 33 hits the target and has the same level of hitting strength as the piston that is the sum of the areas of the first piston 23 and the second piston 33, and the first piston 23 and the A value obtained by adding the weight of the second piston 33 may also affect the hitting strength.

As the second piston 33 strikes the object, the first exhaust hole 27 and the second exhaust hole 39 exhaust the air remaining inside the first cylinder 21 and the second cylinder 31. To lose the inner pressure.

Therefore, the pressure lost inside the first cylinder 21 and the second cylinder 31 and the spring 35 installed in front of the second piston 33 can smoothly return to the position before the strike.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can be implemented in other specific forms without changing the technical spirit or essential features. You can understand. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting.

1: pneumatic strike device
10: air storage unit 11: air tank
13: first pressurization hole 15: spool valve
20: first cylinder part 21: first cylinder
23: first piston 231: second pressing hole
233: guide shaft
25: rear cushion 27: first exhaust hole
30: second cylinder part 31: second cylinder
33: second piston 35: spring
37: front cushion 39: second exhaust hole
40: injection hole

Claims (6)

An air tank 11 filled with compressed air, a first pressing hole 13 formed in the center of the air tank 11, and a spool valve formed above the first pressing hole 13 to rise or fall Air storage unit 10 including (15);
A first cylinder 21 formed under the air storage unit 10 and into which air is injected by pressure from the air storage unit 10 and a second pressurizing hole at the center of the first cylinder 21 A first cylinder part 20 including a first piston 23 on which 231 is formed;
A second cylinder 31 formed under the first cylinder part 20 and into which air is injected by pressure from the first cylinder part 20 and a second piston installed inside the second cylinder 31 ( 33) and a second cylinder portion 30 including a spring 35 installed in front of the second piston 33;
An air injection unit including an injection hole 40 formed at the rear of the spool valve 15, an air hose coupled to the injection hole 40, and a compressor coupled to the air hose to inject or exhaust air;
First exhaust holes 27 formed in a horizontal direction on both front sides of the first cylinder 21;
Including; a second exhaust hole (39) formed in the longitudinal direction in front of the second cylinder (31),
The first exhaust hole 27 and the second exhaust hole 39 are pneumatic strikes using a multi-cylinder that discharges air remaining in the first cylinder 21 and the second cylinder 31 to the outside after being hit Device. delete The method of claim 1,
A separation plate is formed between the first cylinder portion 20 and the second cylinder portion 30,
A pneumatic strike device using multiple cylinders in which the first cylinder 21 and the second cylinder 31 are separated by the separating plate to form a space inside each. The method of claim 1,
The spool valve (15) is a pneumatic strike device using a multi-cylinder including a sealing portion that seals the first pressing hole (13) and a valve portion formed around the sealing portion. The method of claim 4,
The spool valve 15 is lowered toward the first pressurizing hole 13 when air is injected, and the valve portion is retracted toward the sealing portion by air pressure, so that air is injected into the inside of the air tank 11,
After the air injection is completed, the spool valve 15 is raised by the exhaust pressure generated when the compressor exhausts the air remaining in the injection hole 40 and the first pressurized hole 13 is opened to open the air. A pneumatic strike device using multiple cylinders in which the air inside the tank 11 is pressurized and injected into the first cylinder part 20. The method of claim 1,
The second pressurizing hole 231 is formed by a pair of guide shafts 233 inside the first cylinder 21, and the first piston 23 is coupled to the guide shaft 233 to guide upward and downward. Pneumatic strike device using multiple cylinders.

Images