CN2289077Y

CN2289077Y - Piston for air compressor

Info

Publication number: CN2289077Y
Application number: CN 96244010
Authority: CN
Inventors: 陈启明
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-11-14
Filing date: 1996-11-14
Publication date: 1998-08-26
Anticipated expiration: 2006-11-14

Abstract

The utility model relates to a piston for an air compressor, which comprises bolts, air inlet pieces, a spiral ring, a piston head, an air sealing piece, a pad of the air sealing piece, and a guide bar of a piston. The air sealing piece is arranged at the bottom of the piston head matching with the piston to do the reciprocal motion inside the cylinder and then closes or opens the interval thereof for air entering. The air inlet valve can be removed, and the structure of the cylinder can be simplified. The compressed speed of the piston for air entering can be improved. The utility model can realize air entering without blocking, prolong the service life of the air compressor, and reduce cost.

Description

The employed piston of air compressor

The utility model relates to piston, refers to the employed piston of a kind of air compressor especially.

In at present traditional, small-sized or with car portable type air compressor (abbreviation air compressor), employed piston structure, be with high temperature resistant, wear-resistant, Furtulon (TEFLON) material or similar Furtulon material that plasticity is high are done circlewise, be embedded on the outer wall of piston, vapour ring as close gas uses, as shown in Figure 1, traditional thus piston apparatus (A1) after ring-type Furtulon (TEFLON) (A2) weares and teares, produces small gap as can be known between certainty and cylinder wall (A3), can't carry out drive fit and leak gas, the common fault of traditional air compressors such as air pressure deficiency is so that can't work whole air compressor.

Secondly, because the cylinder and the piston that is cooperated of traditional air compressor, and due to the structure of piston itself, thus when piston moves reciprocatingly, air intake valve must be set in cylinder, so that with after the air importing and compress.But,, can produce all that air inlet has some setbacks or deficiency of air especially because of foreign matter enters the obstruction that causes air intake valve because the elastic fatigue of distortion, wearing and tearing or the air inlet stage clip of air inlet valve body is lost its due switching function ... Deng.

The purpose of this utility model is intended to solve the deficiency that above-mentioned traditional air compressor exists, and a kind of employed piston of air compressor of new structure is provided, to reach following effect:

1, piston head is made with whole Furtulon (TEFLON), the nose circle face that upper and lower two different-diameters are arranged, outer wall slightly is the inclined-plane, because whorl is embedded in the interior circular groove of piston head, outer wall to piston head plays support, expansion effect, both provide protection against wear, and can keep the circularity of piston head outer wall again, and formed the effect of anticyclonic high close gas between cylinder wall.

2, airtight plate is to adopt the very high elastic material of fatigue resistance made, at pressurized or not under the situation of pressurized, all can recover its due state with the fastest speed, fitting piston upper and lower to-and-fro motion at a high speed, reach same running stroke, can finish the effect of air inlet, quicken the running and the compression tolerance of piston.

3, the length relation because of locked with bolts makes between piston head and airtight plate between piston head and piston guide rod, still have suitable fine setting gap, friction pulling force or the effect of friction roof pressure power that airtight plate is subjected in the fitting piston running, make airtight plate open a business and airtight, played the effect of air intake valve, the valve loss that traditional air Compressor unit air intake valve causes or the shortcoming of close unsaturated vapor have been solved, simplified the structure of cylinder, improved the anti-fatigue ability of piston, prolong the working life of piston, reduced cost.

The technical solution of the utility model is as follows:

The utility model comprises bolt, air inlet sheet, whorl, piston head, airtight plate, airtight plate pad, piston guide rod, external thread length is fixed on the described bolt, after air inlet sheet piston head, airtight plate, close air cushion sheet are fastened on the top protuberance of piston guide rod, still can make plane, piston head and piston guide rod top keep a suitable gap; Described air inlet sheet is flat disk, and there is a circular hole in central authorities, and periphery is established several inlet holes; Described whorl is a helical spring; Described piston head is with the integrated piston head of Furtulon (TEFLON) material, have interior circular groove and hollow wall, on having, the nose circle face of following two different-diameters, outer wall is the inclined-plane slightly, the air inlet sheet lies in piston head hollow wall top, whorl is embedded in the interior circular groove of piston head, because whorl has support, the expansion effect, and the circularity of maintenance piston head outer wall, make drive fit between piston head and cylinder wall and form high airtight effect, keep a gap between the plane, top of the bottom of piston head and piston guide rod, place an airtight plate and airtight plate pad in the gap; Described airtight plate is the disk that the very high elastic material of fatigue resistance is made, central authorities establish a circular hole, and normality is recessed curved arc shape, are normality when it is not subjected to the piston head compressing, forming the circular gap of air inlet, is smooth closed shape when it is subjected to the piston head compressing; Described airtight plate pad is a flat disk, and central authorities establish a circular hole, places the airtight plate bottom; Described piston guide rod be with bolt with the air inlet sheet, piston head, airtight plate and airtight plate pad all are locked in the top protuberance, keep a suitable displacement gap between the plane, top of piston guide rod and piston head.

Advantage of the present utility model:

1, the utility model can be accomplished accessible air inlet by structural improvement, has quickened the to-and-fro motion of piston again.

2, the utility model had both removed air intake valve, had simplified the installation procedure of air compressor cylinder, in the working life of having improved air compressor again, had reduced cost.

Description of drawings:

Fig. 1 analyses and observe for the structure of traditional air compressor cylinder (comprising piston) and moves schematic representation.

Fig. 2 is the agent structure schematic representation of the utility model piston.

Fig. 3 is the agent structure decomposing schematic representation of the utility model piston.

Fig. 4 is the agent structure sectional view (down motion state signal) of the utility model piston.

Fig. 5 is the agent structure sectional view (up motion state signal) of the utility model piston.

Fig. 6 is the utility model piston profile in plan and upper and lower reciprocating action schematic representation in cylinder.

Below in conjunction with accompanying drawing one preferred embodiment being done one describes in detail.

At first see also shown in Fig. 2,3, structure of piston comprises: bolt (1), air inlet sheet (2), whorl (3), piston head (4), airtight plate (5), airtight plate pad (6) and piston guide rod (7), wherein piston head (4) is one-body molded by Furtulon (TEFLON) material, have interior circular groove (41) and hollow wall (42) the nose circle face of upper and lower two different-diameters is arranged, outer wall (43) is the inclined-plane slightly; Whorl (3) is a helical spring, is embedded in the interior circular groove (41) of piston head (4), can support the outer wall of expansion piston head (4), keeping the circularity of piston head (4), and then and cylinder wall between form drive fit, to improve its compression gas-pressure.

Air inlet sheet (2) is flat disk, horizontal is at hollow wall (42) top of piston head (4), and except that central authorities were provided with a circular hole (21), periphery was established several inlet holes (22), the air inflow that is imported by airtight plate (5) can be compressed in cylinder through inlet hole (22) importing.

Airtight plate (5) is the disk of making for the very high elastic material system of fatigue resistance, normal state is to be recessed curved arc shape, central authorities are provided with a circular hole (51), circular hole (51) is put on top protuberance (71) plane (72) of piston guide rod (7) thus, and airtight plate pad (6) is put in airtight plate (5) bottom; Airtight plate (5) is placed on the bottom of piston head (4), when airtight plate (5) is not subjected to the compressing of piston head (4) bottom is normality, form the circular gap of air inlet, when airtight plate (5) is subjected to the compressing of piston head (4) bottom, be smooth closed shape, to reach the purpose of piston toward the rapid air inlet of bottom offset.

The circular hole (21) that passes the air inlet sheet by a bolt (1) can all be fastened on piston head (4), airtight plate (5) and airtight plate pad (6) on the top protuberance (71) of piston guide rod at last, forms the structure of solid piston; In addition, between piston head (4) and piston guide rod (7), going up externally threaded length because of bolt (1) fixes, so can make piston head (4) and piston guide rod (7) top plan (72) still leave suitable gap, then place airtight plate (5) and airtight plate pad (6) therebetween, piston head (4) displacement in the crack during this time is pressed in the effect of playing valve on the airtight plate (5).

See also shown in Figure 4, because between piston head (4) and piston guide rod plane, top (72), still leave suitable gap, so can be by the elastic force of airtight plate (5), piston head (4) upspringed reserve the gap of air inlet, be piston in cylinder when the bottom offset, piston head (4) because of and cylinder wall between the relation of friction pulling force, add airtight plate (5) and go up the strength on bullet top, make airtight plate (5) revert to the concave arc curved shape of normality, forming a circumferential the first transaction of a day's business gap, this moment air rapidly the inlet hole (22) on air inlet sheet (2) import in cylinder.

See also shown in Figure 5, on the contrary, when piston imposes up compression movement in cylinder, piston head (4) because of and cylinder wall between the relation of friction roof pressure power, be pressed in rapidly on the airtight plate (5), make airtight plate (5) form formation state, and then the gap that it is circumferential presses off, and forms closed state, compresses in order to the air that is imported, reach the program of in one stroke, finishing air inlet simultaneously, as shown in Figure 6.

Claims

1, the employed piston of a kind of air compressor comprises bolt, air inlet sheet, whorl, piston head, airtight plate, airtight plate pad, piston guide rod, it is characterized in that external thread length is fixed on the described bolt; Described air inlet sheet is flat disk, and there is a circular hole in central authorities, and periphery is established several inlet holes; Described whorl is a helical spring; Described piston head is with the integrated piston head of Furtulon (TEFLON) material, have interior circular groove and hollow wall, the nose circle face that upper and lower two different-diameters are arranged, outer wall is the inclined-plane slightly, the air inlet sheet lies in piston head hollow wall top, whorl is embedded in the interior circular groove of piston head, keeps a gap between the bottom of piston head and the top plan of piston guide rod, places an airtight plate and airtight plate pad in the gap; Described airtight plate is the disk that the very high elastic material of fatigue resistance is made, and central authorities establish a circular hole, and normality is recessed curved arc shape; Described airtight plate pad is a flat disk, and central authorities establish a circular hole, places the airtight plate bottom; Described piston guide rod is with bolt air inlet sheet, piston head, airtight plate and airtight plate pad all to be locked in the top protuberance.