JP6067143B2 - Piston body structure of air compressor - Google Patents

Description

  The present invention relates to a piston main body structure of an air compressor, and more particularly, to a buffer gas storage tank in which a piston main body of an air compressor maintains a pressure of compressed air output from an operating compressor within a safe pressure value range. The present invention relates to a piston main body structure of an air compressor that can reduce the manufacturing cost because it is not necessary to separately provide a pressure safety valve in the conventional air compressor.

  The air compressor is a device that injects gas into, for example, an air cushion or a tire. The air compressor is small and easy to carry and install. It can also be connected to a hand-held DC power supply or a cigarette lighter socket of an automobile to supply power to the air compressor. It is very easy. Generally, as shown in FIGS. 14 to 16, a conventional air compressor has a cylinder 81, a piston main body 82, a power motor 93, a gear 94 used as a transmission mechanism, and a pinion as its main basic structure. 95. When the motor 93 is turned on, the gear 94 is driven by the pinion 95 attached to the shaft center, the piston main body 82 is interlocked by the crank pin 96 in the gear 94, and reciprocating linear motion is performed in the inner chamber of the cylinder 81 or the cylinder 91. The high-pressure air generated by such an operation is output via the channel 97 (see FIG. 16), sent into the gas injection object, and gas is injected. Another channel 98 (see FIG. 16) is directly or indirectly connected to a pressure gauge (not shown), and the user can easily know the pressure value of the gas injection visually. Subsequently, as shown in FIGS. 14 and 15, a vent hole 822 is formed in the piston head 821 of the conventional piston main body 82 in the cylinder 81, and is provided in the cylinder 91 as shown in FIG. The piston head 921 of the piston main body 92 is in a solid state and does not have a through hole formed therein, but even the piston main body 82 or the piston main body 92 is mounted in the cylinder 81 or the cylinder 91, respectively. The plurality of air compressor devices are separately provided with a pressure safety valve 84 and a safety valve (not shown in FIG. 16 because they are at different angles), and the pressure value for generating high-pressure air is set at the gas injection object. When the value is exceeded, the pressure relief valve 84 releases the high-pressure air in the air storage chamber 85 to the outside of the machine and does not enter the gas injection again, thereby maintaining the safety of the air compressor device and the gas injection. However, when the pressure relief valve was installed in this way, the manufacturing cost of the manufacturer increased and the economy was low.

The present inventor has the disadvantage that the manufacturing cost increases because the pressure safety valve must be attached to the air compressor device, and the protective action of the pressure safety valve is an indispensable consideration when manufacturing the air compressor device. In view of this, research and development has been carried out in earnest, and an air compressor device having the same protective effect as a pressure safety valve provided in a conventional product has been developed without using a pressure safety valve. The invention has been completed.
(Content of invention)

  A technical problem to be solved by the present invention is to provide a piston body structure of an air compressor that has a safety protection function without providing a pressure safety valve in the air compressor.

In order to solve the above technical problem, the solution of the present invention is:
In the piston body structure of the air compressor, the piston body includes a piston head, an XY reference extending surface extends from a virtual reference on the top surface of the piston head, and the piston head below the XY horizontal plane of the virtual extending is physically There is one buffer air receiving space, and the buffer air receiving space has an opening and is recessed inward from the opening to form a bottom wall and a peripheral wall. The air pressure that continues to be generated by reciprocating linear motion in the cylinder of the compressor does not exceed the safe pressure value of the gas injection object, so there is no need to provide a pressure relief valve with a protective action separately in the air compressor .

  A top end wall of a flat surface is formed at the top end of the piston head around the opening of the buffer air receiving space, and a bottom end wall of the piston head is formed extending downward from the top end wall. A recessed annular groove is formed on the outer peripheral wall between the bottom end wall, and the annular groove is not in communication with the buffer air receiving space. The bottom end wall of the piston head is connected to the first end of the piston rod, and a pivot hole is formed in the second end of the piston rod. An airtight ring is mounted in the annular groove of the aforementioned piston head.

  The above-described piston head has the above-described plurality of buffer air receiving spaces that are not in communication with each other. Each buffer air receiving space has a structure having a different shape and a different depth.

  The above-described piston head is formed with an intake port that penetrates the piston head from the outside to the bottom end wall in the buffer air receiving space. Bumps for fixing the spring are provided on the bottom end wall. During the upward movement stroke, the intake port is closed by the spring, and during the downward movement stroke, when the spring is pushed and opened by the outside air, the outside air enters the cylinder inner chamber.

After adopting the above-mentioned means, the piston head of the above-described piston body of the present invention is provided with a buffer air receiving space without forming a vent hole, and the piston body moves in a reciprocating linear motion within the cylinder of the air compressor. Since the air pressure that continues to be generated does not exceed the safe pressure value of the gas injection product, the pressure of the gas injection product can be maintained safely without providing a pressure safety valve with a protective action separately in the air compressor. It is maintained within the range of values, can be used safely, and there is no need to provide a separate pressure safety valve, and the manufacturing cost is reduced and the economy is high.
(Implementation method)

  In order to further explain the technical means of the present invention, the present invention will be described in detail below by means of specific examples.

  First, FIG. 1 and FIG. 2 will be referred to. As shown in FIGS. 1 and 2, the piston body 6 of the piston body structure of the air compressor of the present invention includes a piston head 61 and a piston rod 62. The XY reference extending surface extends from the virtual reference of the top surface of the piston head 61, and the piston head 61 below the virtual extending XY horizontal plane is physically recessed from the opening 601 inward and the bottom wall 602 and the peripheral wall 603. And one buffer air receiving space 60 formed. The buffer air receiving space 60 is formed with a flat top end wall 611 at the top end of the piston head 61 around the opening 601, and extends downward from the top end wall 611 to form a bottom end wall 612 of the piston head 61. A recessed annular groove 64 is formed on the outer peripheral wall between the top end wall 611 and the bottom end wall 612 of the piston head 61. The annular groove 64 is not in communication with the buffer air receiving space 60. A bottom end wall 612 of the piston head 61 is connected to a first end 621 of a piston rod 62 having a certain length. A pivot hole 63 is formed in the second end 622 which is the terminal end of the piston rod 62. The airtight ring 65 has a function similar to an O-ring and is mounted in the annular groove 64 of the piston head 61 described above.

  When the entire unit 1 of the air compressor of the present invention is actually used, as shown in FIGS. 3 to 6 and 10, the unit 1 has a machine plate 10 as shown in FIG. 10. . A motor 11 is fixed on the machine plate 10 and a cylinder 2 is provided. The pinion 12 in the transmission mechanism is connected to the gear 13, and the eccentric pin 15 on the gear 13 is connected to the pivot hole 63 at the end of the piston rod 62 of the piston body 6. A top wall 22 is provided at the top end of the cylinder inner chamber 21 of the cylinder 2. The top wall 22 has a flow path 23 that penetrates the air storage unit 3 above the cylinder 2, and a plurality of manifolds 31, 32, and 33 are provided on the air storage unit 3. The flow path 23 in the air storage unit 3 is provided with a valve base 34 and a spring 36 above the valve base 34. A hose 41 is connected to the manifold 31 on the air storage unit 3, a pressure indicator 42 is connected to the manifold 32, and a gas vent valve set 5 is attached to the manifold 33. A hat-type soft cap 51 is provided on the innermost side. The entire unit 1 is mounted in a housing, and the housing 4 is physically provided with a changeover switch 45, and the changeover switch 45 is used to turn on or off the operation of the air compressor. The pressure indicator 42 of the unit 1 is exposed from the outer surface of the unit 1, and the push bar 461 inside the other touch switch 46 is inserted into the bolt 52 so that the hat type soft of the vent valve set 5 on the air compressor is inserted. When the user presses the touch switch 46, the hat-type soft cap 51 of the gas vent valve set 5 is easily pressed. The hat-type soft cap 51 is compressed and deformed, and the excessive pressure of the gas injection object is discharged from the manifold 33 attached to the gas vent valve set 5. The hose 41 connected to the manifold 31 is housed in the housing 4 and sealed with an opening / closing lid 47 to improve the appearance of the housing. The aforementioned unit 1 is mounted in the housing 4, and the appearance and internal state thereof are shown in FIGS.

  The operation state of the compressed air in the cylinder inner chamber 21 of the piston body 6 is shown in FIGS. The piston main body 6 of the air compressor performs a reciprocating linear motion in the cylinder 2, and pushes the air in the cylinder inner chamber 21 into the air storage unit 35 of the air storage unit 3 by the upward movement stroke of the piston main body 6 (see FIG. 6). ) And output to the gas injection object through the hose 41 of the manifold 31. Due to the downward stroke of the piston body 6, the outside air enters the cylinder inner chamber 21 from the gap between the piston body 6 and the inner circumferential wall 24 of the cylinder 2 (see FIG. 5), and this is repeated, and gas is injected into the gas injection object. To charge. The piston head 61 of the present invention is provided with a buffer air receiving space 60, and when the piston body 6 reaches the top dead center due to the upward movement stroke, the top end wall 611 of the piston head 61 is the top wall of the top end of the cylinder inner chamber 21. 22, compressed air equal to the volume of the air receiving space is present in the cylinder inner chamber 21 due to the presence of the buffer air receiving space 60. With such a design, the piston body 6 can be used safely by reducing the resistance force and smoothing the operation, and simultaneously maintaining the pressure of the gas injection object within a safe pressure value range even during the gas injection process. it can. Therefore, it is not necessary to separately provide a pressure safety valve in the present invention. Of course, the piston body 6 of the present invention can also be applied to the cylinder 2 in which the air inlet 26 and the spring 27 are installed (see FIG. 7), and the air inlet 26 is moved by the spring 27 during the upward movement stroke of the piston body 6. Closed. During the downward stroke of the piston body 6, the spring 27 is pushed and moved by outside air and enters the cylinder inner chamber 21 through the air inlet 26. As shown in FIGS. 7 and 8, the same effect can be obtained even if such a piston body 6 of the cylinder 2 is applied.

  As shown in FIGS. 12 and 13, the piston body 6 of the present invention performs a reciprocating up and down stroke in the cylinder 2, and the outside air is circulated using the piston head 61 during the down stroke. An intake port 66 that penetrates from the outside to the bottom end wall 612 in the buffer air receiving space 60 is formed in the piston head 61 by entering the inner chamber 21. The bottom end wall 612 is provided with a bump 67 for fixing the spring 68. The intake port 66 is closed by the spring 68 during the upward movement stroke, and the spring 68 is pushed and opened by the outside air during the downward movement stroke. Then, outside air enters the cylinder inner chamber 21.

  As shown in FIG. 11, the piston head 61 of the present invention has a plurality of buffer air receiving spaces P1, P2, and P3, respectively. The plurality of buffer air receiving spaces P1, P2, and P3 are in a non-communication state and are designed to have different depths.

  In summary, the piston main body 6 of the present invention is economical because the buffer air receiving space 60 provided on the piston head 61 does not require a separate pressure safety valve in the entire air compressor, and the manufacturing cost is reduced. Since the piston body 6 has a smooth operation process and high safety, the present invention has novelty and inventive step.

FIG. 1 is an exploded perspective view of a piston body of the present invention. FIG. 2 is a cross-sectional perspective view of the piston body of the present invention. FIG. 3 is a perspective view of the housing of the air compressor device of the present invention. FIG. 4 is a plan view from another angle of the casing of the present invention. FIG. 5 is a flow chart when the air compressor sucks outside air in the backward stroke of the piston body of the present invention. FIG. 6 is a flow diagram of the compressed air when the piston body of the present invention performs the forward travel. FIG. 7 is a flow chart when the air compressor sucks outside air from the air inlet when the piston body of the present invention performs the reverse stroke. FIG. 8 is a flow chart of the compressed air when the piston main body of the present invention performs the forward travel. FIG. 9 is a cross-sectional view from another angle of the present invention. FIG. 10 is a perspective view of the air compressor of the present invention. FIG. 11 is a plan view in which buffer air receiving spaces of different types and structures are provided on the piston body of the present invention. FIG. 12 is an exploded perspective view of another structure of the piston body of the present invention. FIG. 13 is a cross-sectional perspective view of another structure of the piston body of the present invention. FIG. 14 is a flow diagram in which the air compressor sucks outside air when the conventional piston body performs a reverse stroke. FIG. 15 is a flow diagram of compressed air when the conventional piston body performs the forward travel. FIG. 16 is a view from another angle when the conventional piston body performs the forward travel.

1 Unit 10 Machine plate 11 Motor 12 Pinion 13 Gear 15 Eccentric pin 2 Cylinder 21 Cylinder inner chamber 22 Top wall 23 Flow path 24 Inner circumferential wall 26 Air inlet 27 Spring 3 Air storage unit 31 Manifold 32 Manifold 33 Manifold 34 Valve base 35 Air Storage unit 36 Spring 4 Housing 41 Hose 42 Pressure indicator 45 Changeover switch 46 Touch switch 461 Push bar 47 Open / close lid 5 Gas vent valve set 51 Hat type soft cap 52 Bolt 6 Piston body 60 Buffer air receiving space 601 Opening 602 Bottom wall 603 Peripheral wall 61 Piston head 611 Top end wall 612 Bottom end wall 62 Piston rod 621 First end 622 Second end 63 Pivoting hole 64 Annular groove 65 Airtight ring 66 Air inlet 67 Bump 68 Spring 81 Cylinder 82 Pi Ston body 821 Piston head 822 Vent hole 83 Gas vent valve 84 Safety valve 85 Air storage chamber 91 Cylinder 92 Piston body 921 Piston head 93 Motor 94 Gear 95 Pinion 96 Crank pin 97 Channel 98 Channel 901 Gas vent valve

Claims (3)

A piston body structure including a piston head,
Extending the extension surface of the XY reference from the virtual reference of the top surface of the front Symbol piston head, the piston head of the XY horizontal plane below the virtual stretching has between a plurality of buffer air受空non communicating with each other,
The plurality of buffer air receiving spaces have different shapes, different depths, and have openings, respectively , recessed inward from the openings to form a bottom wall and a peripheral wall,
Between said plurality of buffer air受空, as the pressure of the piston body structure thus gaseous object implant the air pressure continues to generate performed reciprocating linear motion in the cylinder of the air compressor does not exceed the safe pressure value Therefore, it is not necessary to separately provide a pressure safety valve having a protective action in the air compressor. A top end wall of a flat surface is formed at the top end of the piston head around the opening of the buffer air receiving space,
A bottom end wall of the piston head is formed extending downward from the top end wall, and a concave annular groove is formed on an outer peripheral wall between the top end wall and the bottom end wall of the piston head,
The annular groove is not in communication with the buffer air receiving space;
The bottom end wall of the piston head is connected to a first end of the piston rod, the second end of the piston rod, pivot hole is formed, the annular groove of the piston head The air compressor piston main body structure according to claim 1, wherein an airtight ring is mounted therein. The piston head is formed with an intake port that penetrates the piston head from the outside to the bottom end wall in the buffer air receiving space,
The bottom end wall is provided with a bump for fixing a spring, and the intake port is closed by the spring during the upward movement stroke, and the spring is pushed and opened by the outside air during the downward movement stroke. The piston main body structure of an air compressor according to claim 1, wherein outside air enters the cylinder inner chamber.

Images