JP6169726B2 - Air compressor structure - Google Patents

Description

  The present invention relates to an air compressor structure, and in particular, a piston body of an air compressor has a buffer air receiving space for holding compressed air output from an operating compressor within a safe pressure value range. The design eliminates the need for a separate pressure safety valve in a conventional air compressor, thereby reducing manufacturing costs.

  An air compressor is a device that injects gas into a gas injection object widely applied to gas injection applications such as air cushions and tires. The air compressor is small and easy to carry and install. It can also be connected to a handheld DC power supply or a car cigarette lighter socket to supply power to the air compressor. Easy to. In general, the main structure of a conventional air compressor is that a piston body is reciprocally compressed in a cylinder by a motor, and the compressed air is sent into the air storage unit through the cylinder before the manifold on the air storage unit. Is connected to the gas injection target through a hose to which gas is connected, and gas is injected. One structure of a conventional air compressor is that the piston head of the piston body is solid. In addition, a pressure relief valve is provided on the air compressor device, and the purpose of this design is to automatically activate the pressure relief valve when the pressure value of the generated high-pressure air exceeds the safety pressure value set for the gas injection object. The high pressure air in the air storage unit is released to the outside of the machine and does not enter the gas injection again, and the safety of the air compressor device and the gas injection can be maintained. The installation of such a pressure relief valve increased the manufacturing cost of the manufacturer and was not economical.

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 an air compressor structure having a safety protection function without requiring a separate pressure safety valve having a protection function.

In order to solve the above technical problem, the solution of the present invention is:
The air compressor structure includes a box body. An air compressor is provided inside the box body. The air compressor has a piston body that is reciprocated up and down in a cylinder by a motor. The piston head of the piston body is formed with a vent hole to form a buffer air receiving space.

  The aforementioned piston body includes the aforementioned piston head and piston rod. The aforementioned buffer air receiving space is formed at the top end of the piston head. The top end of the buffer air receiving space is an opening, and a bottom wall and a peripheral wall that are recessed toward the inside of the piston head are formed. On the bottom wall, the vent hole and the engagement base that communicate with the buffer empty receiving space are formed. Is provided. An elastic spring is mounted on the engagement base in the buffer air receiving space.

  A top end wall which is 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 extending downward from the top end wall is formed, and a concave annular groove is formed on the outer peripheral wall between the top end wall and the bottom end wall of the piston head. The annular concave groove is not in communication with the buffer air receiving space. A first end of the piston rod is connected to the bottom end wall of the piston head. A pivot hole is formed at the second end, which is the end of the piston rod. An airtight ring having a function similar to an O-ring is mounted in the annular groove of the piston head.

  The aforementioned piston body includes the aforementioned piston head and piston rod. A top end wall that is a flat surface is formed at the top end of the piston head. A vent hole that penetrates the piston head is formed on the top end wall. The above-described buffer air receiving space that is recessed from the top end wall toward the inside of the piston head and is not in communication with the vent hole is formed. An engagement base is provided on the top end wall. An elastic spring is mounted on the engagement base on the top end wall. The vent hole is closed by the elastic spring.

  A top wall is formed at the top end of the cylinder inner chamber of the cylinder described above. The top wall has a flow path that passes through an air storage unit on the cylinder. A plurality of manifolds are provided on the air storage unit. A hose is connected to one manifold. A pressure indicator is connected to the other manifold. A gas vent valve is mounted on the other manifold. A hat-type soft cap is provided on the innermost side of the gas vent valve. The flow path in the air storage unit is provided with a valve base and a spring in contact with the valve base.

  The hose connected to the manifold is housed in the box body, and the open / close lid is closed.

  A switch for turning on or off the air compressor is provided on the box body. The pressure indicator of the air compressor is exposed on the outer surface of the box body. Another push bar inside the touch switch is inserted into the bolt and is brought into contact with the hat type soft cap of the vent valve on the air compressor.

  When the piston body reciprocating in the cylinder reaches the top dead center, a buffer space exists between the piston head of the piston body and the top wall in the cylinder.

  After adopting the above-mentioned means, the air compressor structure according to the present invention has a vent hole formed in the piston head of the piston main body of the air compressor in the box body, a buffer air receiving space is provided, and the piston main body When a reciprocating linear motion is performed in the cylinder of the air compressor, and the continuously generated air pressure does not exceed the safe pressure value of the gas injection object, a protective pressure relief valve is not provided in the air compressor. The pressure of the gas injection object is kept within a safe pressure value range, it is safe to use, and there is no need to provide a separate pressure safety valve, and the manufacturing cost is reduced and the economy is high.

The piston body installed in the air compressor structure described in the present invention reciprocates in the cylinder to reach the top dead center, and a buffer space still exists between the piston head of the piston body and the top wall inside the cylinder. The piston body of such a cylinder has the effect of smooth operation.
(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, FIG. 3 and FIG. 6 will be referred to. As shown in FIGS. 1, 3 and 6, the air compressor structure of the present invention includes a box body 1. An air compressor is built in the box body 1 (see FIG. 3). The air compressor includes a cylinder 3 that drives the piston body 6 and a main frame 20 that fixes the motor 21. A power mechanism of an air compressor is fixed to the main frame 20. The power mechanism includes a motor 21, a transmission pinion 22, and a gear 23. The eccentric pin 24 on the gear 23 is connected to the piston main body 6 described above. When the power mechanism of the air compressor is driven by the motor 21, the piston head 61 of the piston body 6 performs a reciprocating compression operation within the inner circumferential wall 34 of the cylinder 3, and the compressed air is valved via the flow path 33. When the base 44 is pushed, the spring 46 is compressed, and the compressed air enters the air storage unit 4. The most important feature of the present invention is that the piston head 61 of the piston body 6 is provided with a vent hole 604 and has a buffer air receiving space 60. The piston body 6 is linearly reciprocated in the cylinder 3 of the air compressor. The air pressure that continues to be generated by the movement does not exceed the safe pressure value of the gas injection object, and it is not necessary to separately install a pressure safety valve having a protective action in the air compressor. Gas injection can be easily performed on the injection, and the gas injection can be protected.

  As shown in FIGS. 4 and 5, the piston body 6 installed in the air compressor structure of the present invention includes a piston head 61 and a piston rod 62, and one end of the top end of the piston head 61 is an opening 601. A buffer air receiving space 60 having a bottom wall 602 and a peripheral wall 603 recessed toward the inside of 61 is formed. On the bottom wall 602 in the buffer air receiving space 60, a vent hole 604 and an engagement base 605 are formed. Is provided. In the buffer air receiving space 60, a top end wall 611 that is a flat surface is formed at the top end of the piston head 61 around the opening 601, and a bottom end wall 612 of the piston head 61 is formed extending downward from the top end wall 611. A concave annular groove 64 is formed on the outer peripheral wall between the top end wall 611 and the bottom end wall 612 of 61. The annular groove 64 is not in communication with the buffer air receiving space 60. The bottom end wall 612 of the piston head 61 is connected to the first end 621 of the piston rod 62 having a certain length, and the second end 622 that is the terminal end of the piston rod 62 has a pivot hole 63. Is formed. 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. The spring 66 is mounted on the engagement base 605 in the piston head 61 described above.

  When the air compressor of the present invention is actually used, a top wall 32 is provided at the top end of the cylinder inner space 31 of the cylinder 3 as shown in FIGS. 3 and 6 to 8. The top wall 32 has a flow path 33 that passes through the air storage unit 4 on the cylinder 3. On the air storage unit 4, a plurality of manifolds 41, 42 and 43 (refer to the manifold 43 in FIG. 10) are provided, and the hose 14 is connected to the manifold 41. A pressure indicator 12 is connected to the manifold 42. A gas vent valve 5 is attached to the manifold 43. A hat-type soft cap 51 is provided on the innermost side of the gas vent valve 5. The flow path 33 in the air storage unit 4 is provided with the above-described valve base 44 and a spring 46 in contact with the valve base 44. The entire air compressor is mounted in the aforementioned box body 1. The box body 1 (referring to FIG. 1 at the same time) is provided with a switch 11 for turning on or off the operation of the air compressor, and the pressure indicator 12 of the air compressor is exposed on the outer surface of the box body 1, Another push bar 131 inside the touch switch 13 is inserted into the bolt 52 and is in contact with the hat-type soft cap 51 of the gas vent valve 5 on the air compressor so that the gas injection object is at a higher pressure value. The user presses the touch switch 13 to come into contact with the hat-type soft cap 51 of the gas vent valve 5. When the hat-type soft cap 51 is compressed and deformed, the excessive pressure of the gas injection object is discharged from the manifold 43 attached to the gas vent valve 5. When the hose 14 connected to the manifold 41 is accommodated in the box body 1 and the open / close lid 15 is closed (see FIG. 2), the aesthetics of the accommodation is obtained.

  The piston main body 6 of the air compressor performs a reciprocating linear motion in the cylinder 3, and when the piston main body 6 performs an upward stroke, the air in the cylinder inner space 31 is pushed into the air storage chamber 45 of the air storage unit 4, It is output from the hose 14 of the manifold 41 to the gas injection object. During the downward stroke of the piston body 6, the spring 66 is driven by the outside air through the vent hole 604 formed in the piston head 61 to flow into the cylinder inner space 31, and the above operation is repeated to inject the gas. Things are filled with gas. The operation state in which the piston body 6 compresses the air in the cylinder inner space 31 will be described with reference to FIGS. 6 and 7. The piston head 61 of the present invention is provided with a buffer air receiving space 60. When the piston body 6 reaches the top dead center in the upward movement stroke, the top end wall 611 of the piston head 61 is the top wall 32 at the top end of the cylinder inner space 31. However, compressed air equal to the volume of the buffer air receiving space is present in the cylinder inner space 31 due to the presence of the buffer air receiving space 60. Such a design reduces the resistance force and makes the operation of the piston body 6 smoother, and can be used safely because the gas injection object is maintained within a safe pressure value range even during the gas injection process. Of course, the piston main body 6 of the present invention can also be applied to the cylinder 3, and as shown in FIG. 9, when the piston main body 6 of the air compressor moves straight in the cylinder 3 and reaches the top dead center. The cylinder inner space 31 exists between the piston head 61 of the piston body 6 and the top wall 32 inside the cylinder 3, and the operation can be made smooth by applying the piston body 6 of the cylinder 3. it can.

  The piston body 7 of the present invention includes a piston head 71 and a piston rod 72 as in the embodiment shown in FIGS. A top end wall 711 having a flat surface is formed at the top end of the piston head 71, and a vent hole 702, an engagement base 713, and a vent hole 702 that is open at one end and recessed inside the piston head 71 are not communicated therewith. Buffer air receiving space 70 is formed, the top end wall 711 extends downward to form the bottom end wall 712 of the piston head 71, and the outer peripheral wall between the top end wall 711 and the bottom end wall 712 of the piston head 71 is formed. A concave annular groove 74 is formed in the annular recess groove 74 and the buffer air receiving space 70 is not in communication. A bottom end wall 712 of the piston head 71 is connected to a first end 721 of a piston rod 72 having a certain length. A pivot hole 73 is formed in the second end 622, which is the end of the piston rod 72. The hermetic ring 75 has a function similar to that of the O-ring, and is mounted in the annular groove 74 of the piston head 71 described above. The elastic spring 76 is attached to the engagement base 713 on the top end wall 711 described above. FIG. 13 and FIG. 14 show an operation in which the piston body 7 compresses air in the cylinder inner space 31. In the piston head 71 of the present invention, a buffer air receiving space 70 is formed, and when the top dead center is reached in the upward movement stroke of the piston body 7, the top end wall 711 of the piston head 71 is the top wall of the top end of the cylinder inner space 31. 32, but the compressed air equal to the volume of the buffer air receiving space exists in the cylinder inner space 31 due to the presence of the buffer air receiving space 70. Therefore, in the gas injection process, the gas injection object can be maintained safely within the safe pressure value range and can be used safely, and the cost of separately providing a pressure safety valve can be reduced.

  In summary, the piston main body 6 according to the present invention does not require a separate pressure safety valve in the entire air compressor due to the buffer air receiving space 60 formed on the piston head 61, and has an economic effect of reducing manufacturing costs. Since the piston body 6 has a smooth operation process and high safety, the present invention has novelty and inventive step.

FIG. 1 is a perspective view of a box body of an air compressor device according to the present invention. FIG. 2 is a plan view from another angle of the box body of the present invention. FIG. 3 is a perspective view of the air compressor of the present invention. FIG. 4 is an exploded perspective view of the piston body of the present invention. FIG. 5 is a cross-sectional view of the piston body of the present invention. FIG. 6 is a view showing that the air compressor sucks and circulates outside air during the backward stroke of the piston body of the present invention. FIG. 7 is a diagram for flowing compressed air when the piston main body of the present invention performs the forward travel. FIG. 8 is a view from another angle when the piston body of the present invention performs the forward travel. FIG. 9 shows another embodiment of the present invention. FIG. 10 is a cross-sectional view from another angle of the present invention. FIG. 11 is an exploded perspective view of a piston body having another structure according to the present invention. FIG. 12 is a cross-sectional perspective view of a piston body having another structure of the present invention. FIG. 13 is a view showing that the air compressor sucks and flows outside air from the air inlet in the backward stroke of the piston main body having another structure of the present invention. FIG. 14 is a view for allowing compressed air to circulate when performing a forward travel of a piston main body having another structure of the present invention.

DESCRIPTION OF SYMBOLS 1 Box body 11 Switch 12 Pressure indicator 13 Touch switch 131 Push bar 14 Hose 15 Opening / closing lid 20 Main frame 21 Motor 22 Pinion 23 Gear 24 Eccentric pin 3 Cylinder 31 Cylinder empty 32 Top wall 33 Flow path 34 Inner circumferential wall 4 Air Storage unit 41 Manifold 42 Manifold 43 Manifold 44 Valve stand 45 Air storage chamber 46 Spring 5 Gas vent valve 51 Hat type soft cap 52 Bolt 5 Gas vent valve 51 Hat type soft cap 52 Bolt 6 Piston body 60 Buffer air receiving space 601 Opening 602 Bottom wall 603 Peripheral wall 604 Vent hole 605 Engagement base 61 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 Spring 7 Pis Down body 70 cushioning air 受空 between 701 apertures 702 vent 71 piston head 711 Itadakitankabe 712 bottom end wall 713 engages the base 72 the piston rod 721 first end portion 73 Kururugiana 74 annular groove 75 airtight ring 76 spring

Claims (7)

An air compressor structure including a box body and an air compressor provided inside the box body,
The air compressor has a cylinder and a piston body that is reciprocated up and down in the cylinder by a motor,
The piston body includes a piston head and a piston rod,
A top end wall that is a flat surface is formed at the top end of the piston head,
On the top end wall, a vent hole penetrating the piston head is formed,
Air compressor structure, characterized in that recessed from said top end wall towards the interior of the penetrating Sezuso the piston head, and between the vent hole and the non-communicating buffer air受空is formed. A bottom end wall of the piston head extending downward from the top end wall is formed, 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;
A first end of a piston rod is connected to the bottom end wall of the piston head;
A pivot hole is formed at the second end, which is the terminal end of the piston rod,
The air compressor structure according to claim 1, wherein an airtight ring having a function similar to an O-ring is mounted in the annular concave groove of the piston head. An engagement base is provided on the top end wall,
An elastic spring is mounted on the engagement base,
The air compressor structure according to claim 1, wherein the vent hole is closed by the elastic spring. A top wall is formed at the top end of the cylinder inner chamber of the cylinder,
The top wall has a flow path extending through an air storage unit on the cylinder;
A plurality of manifolds are provided on the air storage unit,
A hose is connected to one of the manifolds,
A pressure indicator is connected to the other manifold,
Still another manifold is equipped with a vent valve,
On the innermost side of the degassing valve, a hat-type soft cap that is deformed when compressed is provided,
The air compressor structure according to claim 1, wherein a valve base and a spring abutted against the valve base are provided in the flow path in the air storage unit.   The air compressor structure according to claim 4, wherein the hose connected to the manifold is housed in the box body by an open / close lid installed in the box body. On the box body, a switch for turning on or off the air compressor is provided,
The innermost side of the vent valve on the air compressor is provided with a hat-type soft cap that is deformed when compressed,
Pressure Indicator of the air compressor is exposed to the outer surface of the box body, the push bar of the inner data Tchisuitchi is inserted into the bolt, claim 1, characterized in that is brought into contact with the hat Soft Cap The air compressor structure described in 1.   2. A buffer space exists between the piston head of the piston body and a top wall in the cylinder when the piston body that reciprocates in the cylinder reaches top dead center. The air compressor structure described in 1.

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