JP5389349B2 - Air compressor with improved valve body - Google Patents

Description

The present invention relates to an air compressor, and more particularly to an air compressor having an improved intake valve body that effectively controls the flow of air into a piston chamber of a cylinder.

A general air compressor is a cylinder attached to or fixed to a base plate, the cylinder having a piston slidably arranged in a piston chamber inside the base , and a cylinder fixed to the base plate, And a motor coupled to the piston of the cylinder to actuate or drive the piston in a reciprocating motion.

  Applicants have developed various types of common air compressors (Chou Patent Document 1 and Chou Patent Document 2), each of which includes a piston slidably disposed within a cylinder, In order to control the flow of air through the piston, one end is fixed to the piston and the other end has a valve body comprising a spring blade that selectively closes the air hole of the piston.

  Usually, the spring blade is made of an elastic metal or steel material, and at the same time the air suction hole of the piston is partially opened by the spring blade, air is sucked into the cylinder through the air suction hole of the piston. For this purpose, it is attached to bend with respect to the piston.

However, during use, the spring blade must be bent or deformed frequently with respect to one end of the spring blade, which can cause failure due to metal fatigue, resulting in proper piston air intake holes. It may become impossible to block.
US Pat. No. 6,200,110 US Pat. No. 6,280,163

  The present invention has been made to alleviate and / or avoid the above disadvantages of conventional air compressors.

The main object of the present invention is to provide an air compressor having an improved valve body that effectively controls the intake of air into the piston chamber in the cylinder.

  Further objects and advantages of the present invention will become apparent from a careful reading of the detailed description provided below, with appropriate reference to the accompanying drawings.

First, referring to FIGS. 1 and 2, an air compressor according to the present invention includes a substrate 10 having a plate 11, and a cylinder 12 provided on the plate 11 or preferably integrally formed with the plate 11. Cylinder 12 is a piston chamber 13 formed therein has a piston chamber 13 the piston 30 placed slidably received (Fig. 2) therein, also for such purposes of heat dissipation And one or more fins 14 (FIG. 1) extending laterally or radially outward therefrom. The piston 30 has a piston rod 31 and is reciprocated within the piston chamber 13 of the cylinder 12 to generate compressed air.

The cylinder 12 is an outlet pipe 15 provided upward or outward from an upper portion thereof, and is a check valve communicating with the piston chamber 13 of the cylinder 12 for receiving compressed air from the piston chamber 13 of the cylinder 12. It has an outlet pipe 15 having a chamber 16 formed therein. A spring check valve 17 (FIGS. 2 and 3) may be disposed in the outlet pipe 15 and attached so as to open and close the valve seat 18 provided between the outlet pipe 15 and the cylinder 12.
A safety valve or a safety valve (not shown) or the like may be attached to the outlet pipe 15 in order to release a part of the compressed air when the air pressure in the cylinder 12 and the outlet pipe 15 becomes excessive .

Therefore, the check valve 17 is used to restrict the compressed air from flowing only from the piston chamber 13 of the cylinder 12 into the check valve chamber 16 of the outlet pipe 15, and the compressed air is not checked in the outlet pipe 15. It is also possible to prevent backflow from the valve chamber 16 into the piston chamber 13 of the cylinder 12. In order to close or seal the check valve chamber 16 of the outlet pipe 15 and to stably hold the check valve 17 in the check valve chamber 16 of the outlet pipe 15, a cap 19 is attached to the outer end of the outlet pipe 15. part That may be attached to the free end.

One or more cylinders 12 extend outwardly from the outlet pipe 15 and communicate with the check valve chamber 16 of the outlet pipe 15 for receiving compressed air from the check valve chamber 16 of the outlet pipe 15. Ducts 20, 21, 22, and 23 are provided. Ducts 20, 21, 22, and 23 are coupled to various types of equipment that require a supply of compressed air. In order to release part of the compressed air when the air pressure in the cylinder 12 and / or the outlet pipe 15 exceeds a predetermined pressure, thereby preventing over-pressurization and breakage of the cylinder 12 and / or the outlet pipe 15, for example, it may be attached to one of the ducts 20 is provided with a safety valve 24.

To illustrate by detecting the air pressure of the cylinder 12 and / or outlet pipe 15 may be attached to the other duct 21 provided with a pressure gauge 25. A nozzle 26 is attached to another duct 22, and compressed air is supplied from the piston chamber 13 of the cylinder 12 and the check valve chamber 16 of the outlet pipe 15 to various facilities that require supply of compressed air via the nozzle 26. it may be possible.

By providing ducts 20, 21, 22, 23 in the outlet pipe 15, the safety valve 24, the pressure gauge 25 and the nozzle 26 are connected to the outlet pipe 15 without using additional or special coupling members or tools. Note that it can be easily and easily attached to. When it is not necessary to use the ducts 20, 21, 22, 23, one or more lids (not shown) are provided to selectively seal or close the ducts 20, 21, 22, 23, It may be attached to any of the ducts 20, 21, 22, 23 by a screw joint or the like .

A gear 40 is rotatably mounted on the plate 11 with one or more bearings (not shown) and a shaft 41, and an eccentric member 45 (FIG. 1, FIG. 1) within a space 43 defined by a peripheral casing 44 . 2) is attached. The eccentric member 45 may be fixed to the gear 40 with a fastener (not shown) or the like, and in this case, rotates together with the gear 40. Further, in order to reciprocate the piston 30 inside the cylinder 12, a crank or eccentric pin 47 extending from the eccentric member and coupled to the piston rod 31 of the piston 30 is provided.

The motor 50 is attached to the plate 11 with a fastener (not shown) or the like. It has a spindle 52 extending through the plate 11 (FIG. 2) also has a pinion 53 which meshes with both the gear 40 when it is secured to the spindle 52, thereby, the gear 40 the motor 50 By rotating through the pinion 53, the piston 30 can be operated by the eccentric member 45 and the eccentric pin 47 to reciprocate inside the cylinder 12. In order to generate a cooling airflow , a fan device 54 may be further provided, coupled to the motor 50, and rotated by the motor 50.

The operation of the air compressor according to the present invention will be described. As shown in FIG. 2, the piston 30 is driven by a motor 50 via a pinion 53, a gear 40, an eccentric member 45, and an eccentric pin 47. Reciprocated in the cylinder chamber, thereby generating compressed air, supplying the compressed air into the outlet pipe 15, and then requiring compressed air through any or all of the ducts 20, 21, 22, 23 can be supplied to the external device to the air pressure of the cylinder 12 and / or outlet tube 15 can be indicated by detected by the pressure gauge 25, air cylinder 12 and / or outlet pipe 15 is excessively When pressurized, a part of the compressed air can be discharged to the outside through the safety valve 24 to reduce the excessive pressure.

As shown in FIGS. 3 to 5, the piston 30 is preferably provided between the piston 30 and the cylinder 12 between the first annular bulging portion 34 and the second annular bulging portion 38 provided on the outer peripheral portion thereof. A seal ring 32 for hermetically sealing is provided, and an air suction path 33 is formed inside the piston.
The valve body 60 has a first region 61 which is attached to the pressing surface of the piston 30, also together when suitable to open and close the air intake passage 33 of the piston 30, the air intake passage 33 of the air piston 30 Has elasticity suitable for controlling flow through.

The first region 61 of the valve body 60 may be fixed to one end portion of the pressure surface of the piston 30 with one or a plurality of fasteners 62, and the valve body 60 is formed on the edge of the first region 61 . The valve body 60 has a notch 63 (FIG. 3) and is opposite to the edge of the valve body 60 where the notch 63 is provided, that is, between the first region 61 and the second region 65 of the valve body 60. It has an elongated opening 64 formed. At the same time the valve body 60 is formed of an elastic metal or steel, by performing opening and closing of the air intake passage 33 of the piston 30, the air intake passage 33 of the piston 30 is partially opened by the valve body 60, air Is bent so that it can flow into the cylinder 12 through the piston 30.

The piston 30 has a protrusion 35 protruding upward from one end portion of the pressurizing surface of the piston 30 in order to position the one end portion of the valve body 60 in contact with the piston 30, and a notch 63 of the valve body 60. In order to position the valve body 60 with respect to the piston 30, the protrusion 30 extends on the pressure surface of the piston 30 from the ridge 35 in the direction of the center axis of the piston (FIGS. 3 and 6).
The piston 30 has a valve opening restriction device 37 that extends upward from a valve opening restriction device installation region provided at the end opposite to the edge on which the ridge 35 is provided on the pressure surface of the piston 30. The opening of the air intake passage 33 of the piston 30 is configured to be positioned between the ridge 35 and the valve opening restriction device 37. The valve opening restriction device 37 extends upward through the elongated opening 64 of the valve body 60 (FIG. 5) .

The valve opening degree limiting device 37 has a locking claw 39 projecting on the opposite side to the piston central axis, and the piston-side surface of the locking claw 39 is preferably parallel to the pressurizing surface of the piston 30. The valve body 60 is configured to extend above the second region 65 of the valve body 60, thereby locking the edge of the second region 65 of the valve body 60. The valve body 60 can be prevented from being excessively bent or deformed by restricting excessive opening from the pressing surface .

Alternatively, the valve opening restriction device 37 may be provided outside the valve body 60 without being fitted into the elongated opening 64 of the valve body 60, and in that case, the locking claw 39 is also provided with the valve body 60. Extending over the second region 65 of the valve body 60, thereby engaging the second region 65 of the valve body 60 to limit the valve body 60 from bending excessively, It is possible to prevent deformation.

The valve body 60 has a U-shaped slot 66 formed therein, thereby forming a valve body 60 valve component 68, and the U-shaped slot 66 of the peripheral portion 67 and the valve component 68. It can be positioned between them. In order to open and close the opening of the air intake passage 33 of the piston 30 and to control the flow of air through the air intake passage 33 of the piston 30, the valve component 68 is provided with an opening of the air intake passage 33 of the piston 30. Has a larger area .

Alternatively, as shown in FIG. 7, the piston 30 is provided with one or more valve body mounting members 341 protruding upward from the pressure surface , and the valve body 60 is provided with a valve body mounting member 341. One or a plurality of holes 611 for insertion may be provided, and the valve body 60 may be attached to the pressure surface of the piston 30 by these.

The valve body 60 further includes a bridging portion 69 between the U-shaped slot 66 and the elongated opening 64 that connects and couples the peripheral portion 67 and the valve component 68 as well as the elasticity or movement of the valve component 68. Increase the process.
Alternatively, as shown in FIG. 6, the valve body 60 may have no U-shaped slot as described above .

The operation will be described. FIG. 5 is a diagram showing a state in the suction process of the valve body 60 attached to the piston 30. At this time, since the pressure in the piston chamber is reduced, the peripheral portion 67 of the valve body 60 and the second portion The region 65 moves away from the pressurizing surface of the piston 30, and further, the valve component 68 moves away from the peripheral portion 67 of the valve body 60, so that the valve is opened and the outside air passes through the air intake passage of the piston 30. It is sucked into the piston chamber through 33. When the compression process is shifted from this state, the pressure in the piston chamber becomes high. Therefore, the valve component portion 68 of the valve body 60 is pressed against the pressure surface of the piston 30 by being pressed by the pressure in the piston chamber. The opening is closed, the air in the piston chamber is compressed, the check valve 16 is pushed open, and the compressed air is supplied to the outside through the outlet pipe 15.

Therefore, the air compressor according to the present invention has an improved valve body that can effectively control the flow of air through the air intake passage and the flow into and out of the cylinder .

1 is a partially exploded view of an air compressor according to the present invention. FIG. 2 is a partial cross-sectional view of the air compressor taken along line 2-2 of FIG. 1 with a piston assembled in the air compressor. It is a partial exploded view which shows the piston and valve body of an air compressor. FIG. 4 is a partial cross-sectional view taken along line 4-4 of FIG. FIG. 5 is a partial cross-sectional view taken along line 5-5 of FIG. 2 and shows a state of the valve body in the suction process. FIG. 4 is a partially exploded view similar to FIG. 3, showing another structure of the piston and valve body of the air compressor. It is a partial exploded view which shows the piston and valve body of the air compressor of another embodiment.

10 Substrate
11 Plate 12 cylinder
13 Piston chamber
14 Fin
15 outlet pipe
16 Check valve chamber
17 Check valve
18 Check valve seat
19 cap
20, 21, 22, 23 Duct
24 Safety valve
25 Pressure gauge
26 Nozzle 30 Piston 31 Piston rod
32 Seal ring 33 Air intake path
34 First annular bulge
35 ridges
36 protrusions
37 Valve opening limiter
38 Second annular bulging portion 39 locking claw
40 gears
41 shaft
42
43 space
44 Perimeter casing
45 Eccentric member
47 Eccentric pin 50 Motor
52 spindle
53 Pinion 60 Valve body 61 First region
62 Fastener
63 notches
64 Elongated opening 65 Second region
66 U-shaped slot
67 Peripheral part
68 Valve components
69 Bridge part

Claims (6)

A substrate (10) whose main part is a plate (11);
A cylinder (12) provided on a plate (11) of a substrate (10), having a piston chamber (13) formed therein, and from the piston chamber (13) of the cylinder (12) A cylinder (12) having an outlet pipe (15) formed therein with a check valve chamber (16) communicating with the piston chamber (13) of the cylinder (12) for receiving compressed air;
A piston (30) slidably accommodated in a piston chamber (13) of a cylinder (12), having a piston rod (31) coupled thereto, and air communicating with the piston chamber (13) therein A piston (30) having a suction passage (33) and having a first annular bulge portion (34) and a second annular bulge portion (38) for attaching a seal ring (32) to a side surface;
A motor (50) attached to the plate (11) of the substrate (10) for reciprocating the piston (30) within the piston chamber (13) of the cylinder (12) to generate compressed air;
A plate-like valve body (60) attached to the piston (30) at one edge thereof, having a surface area covering most of the upper surface of the piston (30), and controlling the opening and closing of the opening of the air suction passage (33). There,
A first region (61) that covers the opening of the air suction passage (33), is attached to one edge of the pressure surface of the piston (30) at one edge thereof, and controls opening and closing of the opening of the air suction passage (33); ,
A valve body (60) having a first region (61) and a second region (65) provided at the edge on the free end side through an elongated opening (64);
Limiting means for limiting the movement region of the second region (65) of the valve body (60) to limit excessive bending of the valve body (60);
An air compressor comprising.   The restricting means has a valve opening restricting device (37) protruding from the pressurizing surface of the piston (30), and the valve opening restricting device (37) protrudes perpendicularly from the valve opening restricting device (37). The air compressor according to claim 1, further comprising a locking claw (39) located above the region (65). The valve body (60) has an elongated opening (64) formed between the first region (61) and the second region (65), and has a U-shape formed in the first region ( 61 ). The U-shaped slot (66) forms a valve component ( 68 ) and a peripheral component ( 67 ) configured to surround the valve component ( 68 ) from three sides. In addition, the U-shaped slot (66) is positioned between the valve component ( 68 ) and the peripheral component ( 67 ), and the valve opening restricting device (37) includes the valve element (60). elongate apertures (64) projecting to its upward through the addition, the locking claw (39) of the valve opening limiter (37), located above the valve body (60) a second region (65) And limit the distance that the second region (65) of the valve body (60) moves away from the piston (30). To the air compressor according to claim 1 or 2.   The valve body (60) is fixed on the pressure surface of the piston (30) at an edge on the first region (61) side by at least one fastener (62). The air compressor as described in any one. In order to mount the valve body (60) on the pressure surface of the piston (30), the valve body (60) has at least one through hole (611) formed in the edge of the first region (61). The piston (30) has a valve body mounting member (341) at a position corresponding to at least one of the through holes (611) provided in the valve body (60), and at least one valve body mounting member. (341) is passed through a through hole (611) provided in the valve body (60), and the valve body (60) is further mounted on the pressure surface of the piston (30) by the at least one fastener (62). Item 5. The air compressor according to Item 4.   The piston (30) has a protrusion (35) with which the edge of the fixed side of the valve body (30) abuts for positioning of the valve body (60), and the valve body (60) is further fixed. A notch (63) formed on the side edge, and the piston (30) further protrudes from the protrusion (35) to engage with the notch (63) of the valve body (60). The air compressor according to claim 5, comprising:

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