KR101144288B1 - Air compressor - Google Patents

Abstract

PURPOSE: An air compressor is provided to improve the compressive force of the compressor by increasing the sealing force of a piston rod and a compressing chamber. CONSTITUTION: The air compressor comprises a cylinder and an orbiter. The cylinder comprises the dented compressing chamber. The orbiter comprises a frame body(730) and a piston rod part(720) protruded from the frame body. The piston rod part comprises an inner and an outer circumference of the piston rod part. A diameter of an Imaginary circle formed in the end of the piston rod part is wider than the width from the inner circumference of the piston rod part to the outer circumference of the piston rod part. The piston rod part has a deformation ring shape including a discontinuous part. The inner circumference of the piston rod part is the inner circumference of the deformation ring shape and the outer circumference of the piston rod part is the outer circumference of the deformation ring shape.

Description

Air Compressor

The present invention relates to an air compressor, and more particularly to an air compressor having improved compression force.

In general, a rotary air compressor is a device that seals a gas in a constant volume, compresses it to have a high air pressure by reducing the volume in which the gas is sealed with a piston or a rotor. In terms of low noise and noise, it is widely used in various industrial sites such as vehicle maintenance, mechanical work, construction sites, and air tools.

As a typical structure of the rotary air compressor as described above, the rotary shaft that is rotated by the motor of the lower end of the casing is fitted into the shaft hole of the first housing, and the ring gear is provided on the inner circumferential surface of the oscillator that rotates like the end of the rotary shaft. The circular housing is integrally formed, and the second housing coupled to the first housing forms a ring gear on an inner circumferential surface of the circular space in contact with the circular space, and ring gears in the circular space of the oscillator and the second housing. Combining the rotational restraint so that the sun gears on both sides are engaged with each other so that the cam movement can be made. In a compact compressor that receives air through the air, the rotary shaft is stable under centrifugal force by one weight. Rotation is enabled, and on both sides of the oscillator to form a ring-shaped operating hole symmetrically to compress the air by a circular vane fitted thereto, the compressed air compressed in the compression space by the ring-shaped operating hole oscillator It moves to the compression space by the ring-shaped operation hole received through the moving hole of the discharge to the discharge hole formed on the right side of the concave portion of the circular vane, moved to the air storage chamber through the discharge hole and then through the compressed air discharge port casing Patents (patent registration No. 10-0323063) of others that are configured to be collected in the interior of the present is presented.

However, in the case of the above registered patent (Patent Registration No. 10-0323063), when the oscillator and the ring-shaped operating hole rotates according to the left and right symmetry, it is constructed to operate while continuously hitting the inner wall of the circular vane and the second housing. There is a problem that the operation noise is very large, and furthermore, as the circular vane is integrally formed with the second housing, the mold processing is complicated, and thus, the manufacturing time and cost are greatly increased. This was there.

Among various types of rotary air compressors which improve the above problems, the applicant divides the compression chamber into two first and second compression chambers when the orbiter is coupled to the compression chamber which becomes the compression space of the air, and the orbiter February 29, 2009, the "air compressor" that can provide compressed air by reducing the volume of the first and second compression chambers cross-reduced in a stable eccentric rotation movement in conjunction with the holder ring in the compression chamber Jha application (application number: 10-2009-0013659).

That is, the above-mentioned "air compressor" is coaxial with the eccentric rotation shaft and the orbiter when the orbiter compressed to the eccentric rotation shaft rotates along the compression chamber while the eccentric rotation shaft to which rotational force is applied from an external power source rotates. The holder ring, which has been built up, is guided to the stable eccentric cam movement in the compression chamber, thereby making it possible to effectively compress air while having a simpler structure than the conventional rotary air compressors of various forms. There was a very big effect that can significantly reduce the manufacturing cost.

However, in the case of the "air compressor" described above, the holder ring for inducing a stable cam motion of the orbiter is coupled only to the center of the orbiter, which is an eccentric rotation of the orbiter having a certain amount of eccentricity. The wide orbital orbiter had many difficulties in guiding the stable eccentric cam movement.

Accordingly, the present applicant has three driven members having equal intervals while rotating coaxially with the eccentric rotation axis on the circumferential surface of the orbiter constituting the "air compressor (application number: 10-2009-0013659). On April 15, 2010, the "Rotary Air Compressor", which is equipped with a holder and can attenuate vibration caused by eccentric rotation, has been filed (Application No. 10-2010-0034840).

At this time, in the application number 10-2009-0013659 for the air compressor and the application number 10-2010-0034840 for the rotary air compressor, both applications, the piston rod of the orbiter eccentric rotational movement in the compression chamber of the cylinder In this case, the volume of the first and second compression chambers of the compression chamber is selectively compressed to correspond to a method of discharging the compressed air to the air outlet.

Therefore, in the eccentric movement of the piston rod portion in the compression chamber, the sealing force between them acts as an important factor for the compression force of the air compressor, and thus, to increase the sealing force of the piston rod portion and the compression chamber to improve the compression force of the air compressor. It is necessary.

The present invention is to solve the above problems, the object of the present invention is to provide an air compressor with improved compression force by increasing the sealing force of the piston rod and the compression chamber.

 The problems to be solved by the present invention are not limited to the above-mentioned technical problems, and other technical problems which are not mentioned can be clearly understood by those skilled in the art from the following description.

In order to solve the above-mentioned problems, the present invention provides a cylinder including a compression chamber recessed; And an orbiter including a protruding piston rod portion, wherein the piston rod portion includes an inner circumferential surface of the piston rod portion and an outer circumferential surface of the piston rod portion, and includes an end portion at an end portion to protrude from the frame body. It provides an air compressor, characterized in that the diameter of the imaginary circle based on the curvature formed at the end is larger than the width from the inner peripheral surface of the piston rod to the outer peripheral surface of the piston rod.

In another aspect, the present invention is characterized in that the end portion comprises a first end and a second end, wherein the first end and the second end are partitioned by a discontinuous portion in which the piston rod portion does not protrude. Provide a compressor.

In addition, the present invention is the compression chamber includes a compression chamber inner peripheral surface and the compression chamber outer peripheral surface, including a sealing surface at the end is formed in the interior of the cylinder, based on the curvature formed on the sealing surface of the end of the compression chamber An air compressor is provided, wherein the diameter of the imaginary circle is larger than the width from the inner circumferential surface of the compression chamber to the outer circumferential surface of the compression chamber.

The present invention also provides that the sealing surface includes a first sealing surface and a second sealing surface, wherein the first sealing surface and the second sealing surface are partitioned by a sealing part in which the compression chamber is not formed. It provides an air compressor characterized by.

The present invention also provides an air compressor, wherein the cylinder further includes an air inlet formed through one side of the compression chamber and an air outlet formed through the other side of the compression chamber with respect to the sealing part. do.

According to the present invention as described above, in compressing the outside air by contacting the end of the piston rod portion with the end of the piston rod part in the closed surface region of the extreme end of the compression chamber, the contact area is increased, thereby improving the compression force of the air compressor. You can.

1a to 1c is a schematic illustration showing a compressed state of a rotary air compressor of a general structure.
Figure 2a is a schematic diagram for explaining the compression chamber of the rotary air compressor of the general structure, Figure 2b is a schematic diagram for explaining the piston rod of the rotary air compressor of the general structure, Figure 2c is a rotary air of the general structure It is a schematic diagram for demonstrating that a compressor is not completely sealed.
Figure 3a is a plan view showing a cylinder of the air compressor according to the present invention, Figure 3b is a sectional view showing a cylinder of the air compressor according to the invention, Figure 3c is a bottom view showing a cylinder of the air compressor according to the present invention. 3d is a schematic diagram for explaining a compression chamber of a cylinder of an air compressor according to the present invention.
Figure 4a is a plan view showing the orbiter of the air compressor according to the invention, Figure 4b is a sectional view showing the orbiter of the air compressor according to the invention, Figure 4c shows the orbiter of the air compressor according to the invention It is a bottom view.
5a to 5i are schematic illustration showing the compressed state of the air compressor according to the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the present embodiments are intended to complete the disclosure of the present invention, and the general knowledge in the art to which the present invention pertains. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Regardless of the drawings, the same reference numbers refer to the same components, and “and / or” includes each and every combination of one or more of the items mentioned.

Although the first, second, etc. are used to describe various components, these components are of course not limited by these terms. These terms are only used to distinguish one component from another. Therefore, of course, the first component mentioned below may be a second component within the technical spirit of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. As used herein, "comprises" and / or "comprising" does not exclude the presence or addition of one or more other components in addition to the mentioned components.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used in a sense that can be commonly understood by those skilled in the art. In addition, the terms defined in the commonly used dictionaries are not ideally or excessively interpreted unless they are specifically defined clearly.

The spatially relative terms " below ", " beneath ", " lower ", " above ", " upper " It may be used to easily describe the correlation of a component with other components. Spatially relative terms are to be understood as including terms in different directions of components in use or operation in addition to the directions shown in the figures. For example, when flipping a component shown in the drawing, a component described as "below" or "beneath" of another component may be placed "above" the other component. Can be. Thus, the exemplary term "below" can encompass both an orientation of above and below. The components can be oriented in other directions as well, so that spatially relative terms can be interpreted according to the orientation.

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

1a to 1c is a schematic illustration showing a compressed state of a rotary air compressor of a general structure. At this time, the rotary air compressor of the general structure may be an air compressor of the application number 10-2009-0013659 and a rotary air compressor of the application number 10-2010-0034840.

First, referring to FIG. 1A, a piston rod part 320 constituting an orbiter (not shown) is installed in the compression chambers 251 and 252 constituting the cylinder 200 in a rotary air compressor having a general structure. do. The piston rod 320 is partitioned into two compression chambers 251 and two compression chambers 252 while eccentric movement in the compression chamber.

At this time, the orbiter (not shown), for example, in accordance with the eccentric rotation operation of the eccentric rotation axis (not shown) as in the application number 10-2010-0034840, the eccentric rotation operation, the air intake 220 The air provided through the air is compressed to selectively reduce the first compression chamber 251 and the second compression chamber 252.

In addition, the compressed air compressed by the first air outlet 230 and the second air outlet 240 is selectively discharged.

More specifically, referring to FIG. 1B, in the process of inhaling air into the compression chambers 251 and 252 through the air inlet 220, power is supplied to the driving source to rotate the eccentric rotation shaft (not shown). The orbiter (not shown) is eccentrically rotated along the inner circumferential surfaces of the compression chambers 251 and 252. In this process, the piston rod 320 constituting the orbiter (not shown) is the first compression chamber 251. ) Is reduced to discharge the air sucked into the first compression chamber 251 to the first air outlet 230 in a compressed state, and then close the first air outlet 230.

Next, referring to FIG. 1C, when the eccentric rotation axis (not shown) continues to rotate with the power of the driving source, the orbiter (not shown) is eccentrically rotated along the outer circumferential surfaces of the compression chambers 251 and 252. In the process, the piston rod 320 constituting the orbiter (not shown) reduces the second compression chamber 252 to compress the air sucked into the second compression chamber 252 in the second air. After discharging to the outlet 240, the second air outlet 240 is closed.

At this time, in the rotary air compressor having a general structure, in the eccentric rotation operation of the piston rod portion along the inner circumferential surface of the compression chamber, complete sealing is performed at each end region, that is, the region where the end of the piston rod portion and the sealing surface of the compression chamber are in contact with each other. 1B and 1C, gaps such as G1 and G2 occur. This will be described later.

Figure 2a is a schematic diagram for explaining the compression chamber of the rotary air compressor of the general structure, Figure 2b is a schematic diagram for explaining the piston rod of the rotary air compressor of the general structure, Figure 2c is a rotary air of the general structure It is a schematic diagram for demonstrating that a compressor is not completely sealed.

First, referring to FIG. 2A, a compression chamber 253 of a cylinder in a rotary air compressor having a general structure is recessed in a width of W1 from the inner circumferential surface of the compression chamber to the outer circumferential surface of the compression chamber.

In addition, when the imaginary circle is formed on the compression chamber 253 of the cylinder based on the curvature formed at the closed end of the cylinder, the imaginary circle is recessed to a diameter of d1.

At this time, the diameter of the virtual circle d1 based on the width of W1 from the inner circumferential surface of the compression chamber to the outer circumferential surface of the compression chamber and the curvature formed at the closed end of the compression chamber is formed to have the same length.

Next, referring to FIG. 2B, the piston rod part 320 of the orbiter of the rotary air compressor of the general structure is formed to protrude in the width of W2 from the inner circumferential surface of the piston rod to the outer circumferential surface of the piston rod.

In addition, when the piston rod 320 of the orbiter is formed of a virtual circle based on the curvature formed at the end of the most end, the virtual circle is formed to protrude to the diameter of d2.

At this time, the diameter of the virtual circle d2 based on the width of W2 from the inner circumferential surface of the piston rod portion to the outer circumferential surface of the piston rod portion and the curvature formed at the end of the end of the piston rod portion is formed to have the same length.

That is, as shown in Figures 2a and 2b, the recessed compression chamber is formed in the same width or diameter as a whole, the protruding piston rod is formed in the same width or diameter as a whole.

Thus, as shown in FIGS. 1A to 1C, in the eccentric rotation operation of the piston rod portion along the inner circumferential surface of the compression chamber, the most end region, that is, the region where the end of the piston rod portion and the sealing surface of the compression chamber are in contact with each other. In this case, the area in contact with each other is limited, and the sealing force is lowered, and therefore, the compression force of the air compressor is also lowered.

That is, as shown in FIG. 2C, for example, when two complete circles 252 and 320 come into contact, at one point P, they will come into contact at a point. Since the sealing unit 260 is included, for example, the gap shown in FIGS. 1B and 1C is generated.

Accordingly, the present applicant recognizes the importance of increasing the sealing force of the piston rod portion and the compression chamber to improve the compression force of the air compressor, and proposes a structure of the piston rod portion and the compression chamber for increasing the sealing force.

On the other hand, as will be described later, the present invention is characterized in that the compression chamber of the cylinder of the air compressor and the piston rod of the orbiter of the air compressor, the rest of the configuration, for example, the coupling structure of the cylinder and the frame, the cylinder And the combination structure of the orbiter, the individual structure and the coupling structure of the rotating core, the individual structure and the coupling structure of the driven holder, etc., the air compressor of the application No. 10-2009-0013659 and the rotary air compressor of the application No. 10-2010-0034840 Since reference may be made, a detailed description thereof will be omitted.

In addition, since the present invention is characterized in that the compression chamber of the cylinder of the air compressor and the piston rod of the orbiter of the air compressor, the rest of the structure except for this can be changed freely, except for this kind of structure is limited It means not received.

Figure 3a is a plan view showing a cylinder of the air compressor according to the present invention, Figure 3b is a sectional view showing a cylinder of the air compressor according to the invention, Figure 3c is a bottom view showing a cylinder of the air compressor according to the present invention. 3d is a schematic diagram for explaining a compression chamber of a cylinder of an air compressor according to the present invention.

First, referring to FIGS. 3A to 3C, the cylinder 600 of the air compressor according to the present invention includes a compression chamber 653 formed in the cylinder.

That is, the compression chamber 653 is recessed in the inside of the cylinder in a circular ring shape, one side is sealed by the sealing portion 650, the compression chamber 653 of the compression chamber 653 An air inlet 620 is formed at one side thereof, and the first air outlet 630 and the second air outlet 640 are formed at the other side of the compression chamber 653 based on the sealing part 650. Configure.

)의 구조라 정의하기로 한다.That is, the compression chamber is formed in a circular ring shape, and corresponds to a discontinuous circular ring shape in which the compression chamber is not recessed in the sealing part 650. Hereinafter, in the present invention, the shape of the compression chamber is a deformed ring shape including a discontinuous portion (

We will define the structure as).

More specifically, the compression chamber 653 includes a compression chamber inner circumferential surface 655 and a compression chamber outer circumferential surface 656, and includes a first sealing surface 661 and a second sealing surface 662 at the extreme end thereof. Is formed in the interior of the recess, in this case, the first sealing surface 661 and the second sealing surface 662 is partitioned by the sealing portion 650.

On the other hand, as shown in Figure 3b, in addition to the compression chamber, the cylinder 600 of the air compressor according to the present invention may further include an eccentric space formed in the center area, which is not a characteristic part of the present invention. As a detailed description thereof will be omitted, but for this matter, reference may be made to the rotary air compressor of Patent No. 10-2010-0034840.

Next, referring to FIG. 3D, the compression chamber 653 of the cylinder of the air compressor according to the present invention is recessed in the width of W3 from the inner circumferential surface of the compression chamber to the outer circumferential surface of the compression chamber.

In addition, when the compression chamber 653 of the cylinder forms a virtual circle based on the curvature formed at the closed end of the cylinder, the virtual circle is recessed to a diameter of d3.

At this time, the present invention is characterized in that the diameter d3 of the imaginary circle based on the curvature formed at the closed end of the compression chamber is larger than the width W3 from the inner circumferential surface of the compression chamber to the outer circumferential surface of the compression chamber.

That is, by making the diameter d3 of the imaginary circle based on the curvature formed at the closed end of the compression chamber larger than the width W3 from the inner circumferential surface of the compression chamber formed at the other part of the compression chamber to the outer circumferential surface of the compression chamber, In contact with the cylinder rod portion of the orbiter described later, the contact area can be increased. This will be described later.

Figure 4a is a plan view showing the orbiter of the air compressor according to the invention, Figure 4b is a sectional view showing the orbiter of the air compressor according to the invention, Figure 4c shows the orbiter of the air compressor according to the invention It is a bottom view.

4A to 4C, the orbiter 700 of the air compressor according to the present invention includes a frame 730 constituting a main body and a piston rod portion 720 protruding from the rear surface of the frame 730. .

The frame 730 is a portion for eccentric movement by receiving a rotational force from an eccentric rotation shaft (not shown), the piston rod is accommodated in the compression chamber 653 constituting the cylinder 600 of Figures 3a to 3d, According to the eccentric movement of the frame 730, the external air introduced through the air inlet 620 is compressed in the compression chamber 653 to be discharged to the first air outlet 630 and the second air outlet 640.

)의 구조를 가진 압축챔버(653)에 수용되어 있는 상기 오비터(700)의 피스톤 로드부(720)는 편심 회전운동을 하지 못하고 상기 압축챔버(653)의 내주면 및 외주면을 따라 편심 캠운동을 수행하게 되는 것이다.More specifically, the deformed ring shape is formed by the sealing part 650 constituting the cylinder 600 (

The piston rod portion 720 of the orbiter 700 accommodated in the compression chamber 653 having a structure of) does not perform an eccentric rotational movement and performs an eccentric cam movement along the inner and outer circumferential surfaces of the compression chamber 653. It will be done.

Looking at the piston rod portion 720 of the orbiter 700 in more detail, the piston rod 720 includes a piston rod inner circumferential surface 765 and the piston rod portion outer peripheral surface 755, the first end Including the first end 761 and the second end 762 protruding from the frame, wherein the first end 761 and the second end 762 is a non-continuous portion (not protruding from the piston rod) 750).

)의 구조라 정의하기로 하며, 이는 상술한 압축챔버의 구조와 동일 또는 유사한 구조에 해당한다.That is, the piston rod 720 is formed in a circular ring shape, the non-continuous portion 750 corresponds to a discontinuous circular ring shape in which the piston rod is not protruded. Hereinafter, in the present invention, the shape of the piston rod portion is a deformed ring shape including a discontinuous portion (

It will be defined as the structure of), which corresponds to the same or similar structure as the structure of the compression chamber described above.

Meanwhile, as shown in FIG. 4A, the orbiter 700 of the air compressor according to the present invention may further include an eccentric groove formed in the center region and a concave groove formed in the outer region, in addition to the piston rod portion. However, since this is not a characteristic part of the present invention, a detailed description thereof will be omitted, however, reference may be made to the rotary air compressor of Patent No. 10-2010-0034840.

Subsequently, referring to FIG. 4C, the orbiter 700 of the air compressor according to the present invention has a width of W4 from the inner circumferential surface 756 of the piston rod portion to the outer circumferential surface 755 of the piston rod portion. It is formed to protrude.

In addition, when the orbiter 700 forms a virtual circle based on the curvature formed at the first end 761 and the second end 762 of the piston rod 720, the virtual circle Is protruded to a diameter of d4.

At this time, the present invention is characterized in that the diameter d4 of the imaginary circle based on the curvature formed at the end of the piston rod portion is larger than the width W4 from the inner circumferential surface of the piston rod portion to the outer circumferential surface of the piston rod portion.

That is, by making the diameter d4 of the imaginary circle based on the curvature formed at the end of the piston rod portion larger than the width W4 from the inner circumferential surface of the piston rod portion formed at the other portion of the piston rod portion to the outer circumferential surface of the piston rod portion, In contact with the compression chamber of the cylinder described above, the contact area can be increased.

5a to 5i are schematic illustration showing the compressed state of the air compressor according to the present invention.

5A to 5I, piston rods 720 constituting an orbiter (not shown) are installed in the compression chambers 651 and 652 constituting the cylinder in the air compressor according to the present invention. . The piston rod 720 is divided into two first compression chambers 651 and a second compression chamber 652 while eccentric movement in the compression chamber.

At this time, the orbiter (not shown), for example, in accordance with the eccentric rotation operation of the eccentric rotation axis (not shown) as in the application number 10-2010-0034840, the eccentric rotation operation, the air intake 620 The air provided through the first compression chamber 651 and the second compression chamber 652 is selectively reduced to compress the air.

In addition, the compressed air compressed by the first air outlet 630 and the second air outlet 640 is selectively discharged.

More specifically, when the air is sucked into the compression chambers 651 and 652 through the air inlet 620, when the power is applied to the driving source to rotate the eccentric rotation axis (not shown), the orbiter (not shown) The eccentric rotation is performed along the inner and outer circumferential surfaces of the compression chambers 651 and 652. In this process, the piston rod 720 constituting the orbiter (not shown) reduces the first compression chamber 651. The air sucked into the first compression chamber 651 is discharged to the first air outlet 630 in a compressed state, and then the first air outlet 630 is closed.

In addition, when the eccentric rotation axis (not shown) continues to rotate by the power of the drive source, the orbiter (not shown) is eccentric rotation operation along the outer circumferential surface of the compression chamber (651, 652), in this process orbiter (not shown) Piston rod 720 constituting the () is reduced to the second compression chamber 652 to discharge the air sucked in the second compression chamber 652 to the second air outlet 640 in the compressed state Next, the second air outlet 640 is closed.

In this case, reference numeral 660 denotes a central axis of the cylinder, and 730 denotes a central axis of the orbiter.

On the other hand, as described above, in the present invention, the diameter of the virtual circle based on the curvature formed at the closed end of the compression chamber is larger than the width from the inner circumferential surface of the compression chamber to the outer circumferential surface of the compression chamber.

Further, in the present invention, the diameter of the imaginary circle based on the curvature formed at the end of the piston rod portion is formed larger than the width from the inner circumference of the piston rod portion to the outer circumference of the piston rod portion.

For this reason, in the present invention, it can be seen that the area in contact with each other increases in compressing the outside air by contacting the end of the end of the piston rod with the closed surface area of the end of the compression chamber.

That is, as shown in Figures 2a and 2b, the air compressor of the general structure is formed in the same compression chamber is formed in the same width or diameter of the whole, the protruding piston rod is formed in the same width or diameter of the whole. . For this reason, in the eccentric rotation operation of the piston rod portion along the inner circumferential surface of the compression chamber, there is a limit in the area that is in contact with each other at the most end region, that is, the region where the end of the piston rod portion and the sealing surface of the compression chamber are in contact with each other. This is lowered and, therefore, the compression force of the air compressor is also lowered.

However, in the present invention, the diameter of the imaginary circle based on the curvature formed on the closed end of the compression chamber is larger than other areas of the compression chamber, and based on the curvature formed on the end of the piston rod. Since the diameter of one imaginary circle is formed larger than the other area of the piston rod portion, the contact area is increased by the length formed largely, and accordingly, the sealing force increases with the increase of the contact area, eventually, The compression force of the air compressor is to be improved.

According to the present invention as described above, in compressing the outside air by contacting the end of the piston rod portion with the end of the piston rod in contact with the closed surface region of the extreme end of the compression chamber, the contact area is increased, thereby improving the compression force of the air compressor. Can be.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. You will understand that. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

600: cylinder 620: air intake
630, 640: air outlet 653: compression chamber
655: inner surface of the compression chamber 656: outer surface of the compression chamber
661, 662: sealing surface 650: sealing
700: Orbiter 730: Frame
720: piston rod portion 761, 762: end
755: outer peripheral surface of the piston rod 756: inner peripheral surface of the piston rod

Claims (5)

A cylinder including a recessed compression chamber; And
An orbiter including a frame forming a body and a piston rod protruding from the frame,
The piston rod portion includes an inner circumferential surface of the piston rod portion and an outer circumferential surface of the piston rod, and includes an end portion at an end thereof to protrude from the frame body.
The diameter of the imaginary circle based on the curvature formed at the end of the end of the piston rod portion is larger than the width from the inner peripheral surface of the piston rod portion to the outer peripheral surface of the piston rod portion,
The piston rod portion has a deformed ring shape including a discontinuous portion (

The piston rod portion inner circumferential surface is the inner ring surface of the deformed ring shape, the piston rod portion outer circumferential surface is the outer ring surface of the deformed ring shape, and the end portion is formed by the discontinuous portion of the deformed ring shape. Air compressor characterized in that. The method of claim 1,
The end includes a first end and a second end,
And the first end and the second end are defined by a discontinuous portion in which the piston rod portion does not protrude. The method of claim 1,
The compression chamber includes an inner circumferential surface of the compression chamber and an outer circumferential surface of the compression chamber, and includes a sealing surface at an end thereof, and is formed in the interior of the cylinder.
And the diameter of the virtual circle based on the curvature formed on the closed surface of the end of the compression chamber is larger than the width from the inner circumferential surface of the compression chamber to the outer circumferential surface of the compression chamber. The method of claim 3, wherein
The sealing surface includes a first sealing surface and a second sealing surface,
And the first sealing surface and the second sealing surface are partitioned by a sealing portion in which the compression chamber is not recessed. The method of claim 4, wherein
The cylinder further comprises an air inlet formed through one side of the compression chamber and an air outlet formed through the other side of the compression chamber with respect to the sealing part.

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