KR100861961B1 - Air compressor - Google Patents

Abstract

An air compressor is provided to obtain small and light structure thereof by minimizing an operating track of components used to convert rotating motion of a crank shaft to a linear motion. An air compressor comprises a crank shaft(20), a cam block(30), a plurality of cylinders(40-43), and a connecting rod(50). The crank shaft passes through a casing(10) and is rotatably supported in the casing. The cam block is axially supported on the crank shaft and performs an eccentric rotation. The cylinders having different inner diameters are provided at the casing that crosses an upper surface and two surface of the cam block. A first stage piston(44), a second stage piston(45) and a third stage piston(46) having different outer diameters, respectively, work together with a rotation of the cam block. The connecting rod has an upper end axially supported on the first stage piston and a lower end axially supported to a fixing block(51) which is fixed to the upper surface of the cam block.

Description

Air compressor

1 is a front sectional view illustrating a conventional air compressor;

2 is a front sectional view showing an air compressor according to the present invention;

3 is an exploded perspective view of the present invention,

4 to 7 is an operating state diagram showing the operation of the present invention.

Explanation of symbols on the main parts of the drawings

10: casing

20: crankshaft

30: cam block

40, 41, 42, 43: cylinder

44, 45, 46: piston

50: connecting rod

51: fixed block

60: auxiliary piston

70: return spring

The present invention relates to an air compressor, and more particularly, to a compact and lightweight according to the size reduction by a simple improvement of a structure for converting the rotational motion of the crankshaft into a linear motion, and to reduce vibration and noise. Relates to an air compressor.

In general, a reciprocating air compressor uses a crank shaft and a connecting rod to convert the rotational motion into a linear motion while compressing the air to the pressure required by the linear reciprocating motion of the piston.

Such an air compressor is inevitably enlarged in the case of an industry requiring a large amount of air. However, when the air compressor is used only for a specific purpose such as a survival game or a gun gun, a smaller size is advantageous.

Among the air compressors, air compressors having 1 to 1.5 hp are classified as small and applied in various ways. However, since they are still large and heavy, they are not easy to transport or move. Development trend.

1 is a front sectional view illustrating a conventional air compressor.

The air compressor causes the crankshaft (1) to rotate by a motor driving force, and the one end of the connecting rod (2) at each position having a different eccentric angle from the crankshaft (1) is used for bearing (not shown). It is made to support the shaft rotatably.

The other end of the connecting rod 2 axially supported by the crankshaft 1 is axially supported by the piston 4 provided to linearly reciprocate the inside of the cylinder 3.

At this time, the piston (4) provided in each cylinder (3) has a different compression force according to the cross-sectional area, respectively, to drive the sequential to compress the air.

In particular, in the air compressor, compression is generally performed in stages 1, 2, and 3, and for this purpose, cylinders 3 having different inner diameters and pistons 4 having different outer diameters inserted into the cylinders 3 are provided. I am trying to.

The cylinder 3 and the piston 4 vary depending on the outer diameter of the piston 4, except for the one-stage piston 4a having the largest outer diameter, the two-stage piston 4b and the three-stage piston having a smaller outer diameter. (4c) is an auxiliary piston (5) and auxiliary cylinder (6) of a size that can be axially connected to the connecting rod (2) because it is difficult to directly fix the shaft to the connecting rod (2) in a small air compressor of 1 to 1.5 horsepower It is to be provided.

At this time, the auxiliary piston 5 is connected to the two-stage piston (4b) and the three-stage piston (4c) having a smaller outer diameter in the head cross-section integrally, and the two-stage piston (4b) and the three-stage piston (4c), respectively Is inserted into the auxiliary cylinder 6 so as to slide.

On the other hand, each cylinder 3 is normally provided so that it may be divided into 1 stage, 2 stage, 3 stage, etc. radially with respect to the rotation center axis of the crankshaft 1 inside the casing 7.

However, the conventional compact air compressor not only allows the plurality of connecting rods 2 to be axially supported at different positions of the crankshaft 1, but also the cylinders 3 fixed to the casing 7 on different vertical lines. Since it has to be located, there is a limit to miniaturizing the overall appearance size, which results in a closed end that is not easy to handle, move and transport.

In addition, the connecting rod 2 made of a two-axis connection has a problem that the noise and vibration is severely generated by the rotational friction.

Accordingly, the present invention has been invented to solve the above-described problems of the prior art, and a main object of the present invention is to provide an air compressor that is easy to transport and handle by being able to be manufactured in a very small size.

It is another object of the present invention to provide an air compressor that can minimize noise and vibration.

In order to achieve the above object, the present invention includes a crank shaft through which the casing is horizontally rotatably supported therein; A cam block rotatably provided while being eccentrically supported by the crankshaft; The casing is provided on the casing so as to vertically intersect the upper surface and the side surface of the cam block about the crankshaft, respectively, and the first stage piston, the second stage piston, and the third stage piston having different outer diameters are slidably inserted therein, respectively. A plurality of cylinders as possible; A connecting rod having an upper end rotatably supported by the first stage piston inserted into a cylinder above the cam block, and a lower end rotatably supported by a fixed block fixed to an upper surface of the cam block. It is composed of the combination of.

In the above configuration, the cam block is more preferably formed in the shape of a cube.

In the above configuration, it is most preferable that the two-stage piston and the three-stage piston move in the same direction and length to each other by the operation of the cam block while one end is in sliding contact with both sides of the cam block.

In the above configuration, the connecting rod is most preferably such that the bearing is fixedly coupled to the lower end, and the bearing is rotatably axially supported from the cam block while being bearingly coupled to the fixed block.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a front sectional view showing an air compressor according to the present invention, Figure 3 shows an exploded perspective view of the present invention.

As shown in the drawing, the present invention includes a casing 10, a crankshaft 20, a cam block 30, a plurality of cylinders 40, and a connecting rod 50.

The casing 10 is an outer cover member which is hollow inside.

Inside the casing 10, the crankshaft 20 is axially rotatably supported from one side to the other side.

The crankshaft 20 is a structure which makes the site | part which eccentrically rotates a predetermined distance with respect to a rotation center between the both ends supported by the casing 10 is formed.

The cam block 30 is configured to be rotatably supported by the bearing 31 on an eccentrically formed portion of the crankshaft 20, and it is most preferable that both side surfaces form a vertical plane parallel to each other.

It is most preferable that such a cam block 30 is formed in the shape of a cube as shown.

In the cam block 30 of the present invention, the cylinder 40 is firmly coupled to the casing 10 in the vertical direction from the upper surface and both sides.

The cylinder 40 has a configuration in which the first stage cylinder 41 located above the cam block 30 and the second stage cylinder 42 and the third stage cylinder 43 are located at both sides, and each of these cylinders 40 The inner diameter is to be formed differently.

The piston 40 is inserted into the cylinder 40 to allow the slide movement, and each piston has a first stage piston 44, a second stage piston 45, and a third stage piston having an outer diameter suitable for the inner diameter of the cylinder 40. 46), but the movement strokes of the pistons 44, 45 and 46 are the same.

The first stage piston 44 is inserted into the first stage cylinder 41 having the largest diameter of the upper portion of the casing 10 among the pistons 44, 45, 46 inserted into each cylinder 40, and the second stage on both sides is inserted. The second stage piston 45 and the third stage piston 46 are inserted into the cylinder 42 and the third stage cylinder 43, respectively, but the second stage piston 45 has a smaller outer diameter than the first stage piston 44, and The stage piston 46 has a smaller outer diameter than the two stage piston 45.

On the other hand, if the outer diameter of the pistons is too small, as shown in the three-stage cylinder 43 in the figure, the sleeve 43a is inserted into the cylinder 43, and the three-stage piston 46 slides along the sleeve 43a. You can also

The first stage piston 44 having the largest outer diameter among the plurality of pistons is connected to the cam block 30 through the connecting rod 50.

One end of the connecting rod 50 is axially rotatable to the first stage piston 44, and the other end of the connecting rod 50 is axially rotatable to the fixed block 51 coupled to the upper end of the cam block 30.

The fixing block 51 is configured to be firmly coupled to the upper surface of the cam block 30, and the lower end of the connecting rod 50 is axially coupled to the fixing block 51 by bearing coupling with the connecting rod 50. Make it rotatable.

At this time, the bearing is most preferably such that the lower end of the connecting rod 50 can rotate at least a predetermined angle in both directions.

The bearing 52 is connected to the lower end of the connecting rod 50 while being rotatably connected to the fixing block 51, so that both the first stage piston 44 and the connecting rod 50 rotate to the fixing block 51. Make it possible.

Eventually, since the connecting rod 50 is rotatably connected to the cam block 30, the cam block 30 moves by rotating the crank shaft 20 in an eccentric radius by the rotation of the crank shaft 20. .

Therefore, the connecting rod 50 moves up and down the first stage piston 44 by a constant stroke while the connecting rod 50 is linked to the cam block 30 by moving the cam block 30.

On the other hand, both ends of the cam block 30 may be in direct sliding contact with each end of the piston 45, 46, and the auxiliary piston 60 is provided between the cam block 30 and the piston 45, 46. It may be provided.

At this time, each of the pistons 45 and 46 or the auxiliary piston 60 can always be in close contact with the cam block 30 by the return spring 70.

On the other hand, the auxiliary piston 60 has a receiving groove 61 having an inner diameter slightly larger than the outer diameter of each piston end accommodated in order to accommodate the end portions of the second stage piston 45 and the third stage piston 46. One end of each of the second stage piston 45 and the third stage piston 46 is inserted into the receiving groove 61 of the auxiliary piston 60 so that the sliding contact state is maintained.

On the other hand, one side of the casing 10 is a motor (not shown) is directly coupled so that the driving force of the motor is transmitted directly to the crankshaft 20 is most preferably to further simplify the structure.

In addition, each of the cylinders may be provided with an intake valve and an exhaust valve toward the cylinder head side through which air is guided, and the intake valve and the exhaust valve may be selectively opened by the intake pressure and the exhaust pressure of a predetermined pressure.

The driving of the compressor and its operation according to the present invention configured as described above will be described.

4 to 7 are operating state diagrams showing the operating process of the present invention.

When the driving force is transmitted to the crankshaft 20, the cam block 30 coupled to the eccentric position of the crankshaft 20 is rotated along a predetermined radius by the rotation of the crankshaft 20.

At this time, the connecting rod 50 bearing coupled to the cam block 30 also interlocks with the cam block 30 to vertically raise the first stage piston 44 as shown in FIG. Compresses the air guided to the head side.

When the air compressed by the first stage piston 44 is above a predetermined pressure, the air moves to the head side of the second stage cylinder 42. Thus, the air guided to the second stage cylinder 42 is the first stage piston 44 as shown in FIG. 5. Since the second stage piston 45 is gradually advanced while descending), air introduced into the second stage cylinder 42 is compressed again.

At this time, the third stage piston 46 reverses the amount of advance of the second stage piston 45 to guide the air compressed by the second stage piston 45 to the head side of the third stage cylinder 43.

When the second stage piston 45 is pushed to the maximum while compressing air, the first stage piston 44 is located at the middle height of the first stage cylinder 41, and the second stage piston is continuously rotated by the crankshaft 20. When the first stage piston 44 is lowered together with the 45, the second stage piston 45 and the third stage piston 46 are connected to the second stage cylinder when the cam block 30 is positioned at the lowest height as shown in FIG. 6. 42) and the first stage piston 44 is in a state of being lowered to the lower end because it is in the state of being reversed by the intermediate length.

When the crankshaft 20 rotates again as shown in FIG. 7 and the first stage piston 44 starts to rise again, the second stage piston 45 reverses and the third stage piston 46 corresponds to the second stage piston 45. Since the air is advanced in the direction to be compressed again from the second stage cylinder 42 is introduced into the third stage cylinder 43.

When the air is compressed as much as possible by the three-stage piston 46, the compressed air is supplied to a separate container and used for a necessary purpose.

Therefore, the air compressor of the present invention is the cam block 30 is eccentrically axially supported on the crank shaft 20 by the rotation of the crank shaft 20 while turning the track of a predetermined radius of the cam block 30 on the same vertical line By connecting the pistons sequentially through the connecting rod 50 or the auxiliary piston 60, which is coupled to and closely adhered to the upper surface and both sides, to generate compressed air while gradually increasing the compression pressure of the air.

Thus, the present invention minimizes the operation trajectory of the components for converting the rotational movement of the crankshaft 20 into linear movement, while at the same time being positioned on the same vertical line. It is possible to reduce the size and weight of the compressor.

In addition, the present invention can form a shorter stroke, which is the movement distance of the piston, compared to the configuration in which all the pistons are moved by the connecting rod, it is possible to reduce noise with vibration.

As described above, the present invention enables miniaturization and light weight according to the reduction of the overall appearance, so that it is easy to carry and easy to move, so that it is convenient to carry and can be used in all weather, and the compression efficiency is reduced with the reduction of noise and vibration. This has the advantage of providing increased reliability for higher performance.

Claims (8)

A crankshaft through which the casing is horizontally rotatably supported therein; A cam block that is eccentrically supported by the crankshaft and eccentrically rotates a predetermined radius; The inner diameter is different from each other in the casing perpendicularly intersecting the upper surface and both sides of the cam block with respect to the crankshaft, and the first stage piston, the second stage piston, and the third stage piston having different outer diameters are formed in the cam block. A plurality of cylinders inserted in such a manner as to be slidably movable in association with the rotation drive; An upper end of the plurality of cylinders is rotatably supported by the first stage piston inserted into the upper cylinder of the cam block, and a lower end is rotatably supported by a fixed block fixed to the upper surface of the cam block. Connecting rod; Compressor made by combining. The air compressor of claim 1, wherein a motor is coupled to one side of the casing, and a driving force is connected to the crankshaft directly from the motor. The air compressor of claim 1, wherein the cam block is rotatably coupled by a bearing at a position eccentric from a rotational center of the crankshaft. The auxiliary piston of claim 1, further comprising an auxiliary piston between the cam block, the second stage piston, and the third stage piston to make sliding contact with an end of the second stage piston and the third stage piston and a side surface of the cam block. Air compressor. 5. The air compressor of claim 4, wherein the auxiliary piston forms a receiving groove to accommodate one end of the second stage piston or the third stage piston on one side thereof. The air compressor of claim 1, wherein a fixing block is fixedly coupled to an upper portion of the cam block, and the fixing block is rotatably connected to a lower end of the connecting rod by a bearing coupling. 7. The air compressor of claim 6, wherein the connecting rod has a lower end bearing coupled to the fixed block. The air compressor of claim 1, wherein the connecting rod is axially supported at an upper end thereof so as to be rotatable in the first stage piston in parallel with an axial support direction of the cam block.

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