CN2558782Y

CN2558782Y - Piston type small air pump

Info

Publication number: CN2558782Y
Application number: CN 02227724
Authority: CN
Inventors: 梁丽嫦
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-05-21
Filing date: 2002-05-21
Publication date: 2003-07-02
Anticipated expiration: 2012-05-21

Abstract

The utility model provides a piston micro air pump, consisting of a body (1), a motor (2) and an exhaust unit. A cylinder sleeve (11) is positioned on the body (1) and the output shaft (21) of the motor (2) is fixed with a crank (22) that does reciprocating motion in the cylinder sleeve (11) by a driving piston (4) of a connecting rod (3). An air inlet valve (6) made of rubber and an air inlet (41) are arranged at the top of the piston. The air inlet valve (6) covers the air inlet (41) and the air in the cylinder is compressed and exhausted, thus realizing squeeze exhaust casting process, when the piston (4) goes up. For the piston air pump can have comparatively long stroke, the pressure gas effect is good and the efficiency high; besides, the service life of the utility model is long due to no diaphragm is arranged.

Description

The piston type micro air pump

Technical field the utility model relates to variable capacity machinery, particularly relates to the micro air pump that is used for the Medical Instruments aspect.

Background technique all is to adopt the diaphragm type air pump on the mini-plant such as Medical Instruments now on the market, this air pump utilizes motor drives one eccentric rod, stir fork swing by the termination of eccentric rod again, the valve body that drives these fork two ends moves reciprocatingly, and realizes exhaust and air-breathing.Because be subjected to the restriction of barrier film, the gap between valve body and valve pocket is bigger, and stroke is less, so, be air-breathing or exhaust all insufficient, effect is relatively poor.Because this air pump is the axial power way of output, the volume of air pump is bigger.The rubber membrane that also has this air pump is by the vibration at high speed of per minute several thousand times, the easy holes of rubber, and pressurization efficient is low, working life short.

The summary of the invention the purpose of this utility model is for fear of above-mentioned the deficiencies in the prior art, and provide a kind of suction, exhaust fully, pressurization is effective and the piston type micro air pump of long service life.

The utility model comes specific implementation by implementing following technological scheme, makes a kind of piston type micro air pump, comprises body, is fixed in motor in the body and the venting gas appliance that is fixed in body upper.Described body is provided with cylinder liner, be fixed with crank throw on the output shaft of motor, one end of connecting rod is enclosed within on the crank throw neck of crank throw, the other end is connected with the piston that can move reciprocatingly in cylinder liner, inlet hole and inlet valve hole are arranged at the top of this piston, the valve rod that rubber material is made the suction valve of umbrella is embedded in the air valve hole, and its valve cake then covers on the mouth of inlet hole piston head.The rotation of motor drives crank throw moves reciprocatingly in cylinder liner by the connecting rod driven plunger on the crank throw neck.When descent of piston, form negative pressure at piston head, air enters in the cylinder by the valve cake that inlet hole backs down suction valve.When piston stroking upward, the valve cake then covers on the inlet hole, and the air in the cylinder is compressed and discharges, and realizes the pressurization degassing function.

Because air pump in the form of piston can design bigger stroke, so it is effective to calm the anger, the efficient height, and, owing to do not have barrier film, so long service life.

Description of drawings

Fig. 1 is that the master of the utility model piston type micro air pump looks cross-sectional schematic.

Fig. 2 is the connection diagram of crank throw described in Fig. 1 22, connecting rod 3 and piston 4.

Fig. 3 is that the master of body described in Fig. 11 looks cross-sectional schematic.

Further describe the most preferred embodiment of the utility model below in conjunction with accompanying drawing.

Embodiment can find out that from Fig. 1 and Fig. 2 the piston type micro air pump of the utility model design comprises body 1, is fixed in motor 2 in the body 1 and the venting gas appliance 5 that is fixed in body 1 top.Described body 1 is provided with cylinder liner 11, be fixed with crank throw 22 on the output shaft 21 of motor 2, one end of connecting rod 3 is enclosed within on the crank throw neck 221 of crank throw 22, the other end is connected with the piston 4 that can move reciprocatingly in cylinder liner 11, inlet hole 41 and inlet valve hole 42 are arranged at the top of this piston, the valve rod 61 that rubber material is made the suction valve 6 of umbrella is embedded in the air valve hole 42, and 62 of its valve faces cover on the mouth at inlet hole 41 pistons 4 tops.Motor 2 drives crank throw 22 rotations, moves reciprocatingly in cylinder liner 11 by 3 driven plunger 4 of the connecting rod on the crank throw neck 221.When piston 4 is descending, form negative pressure at piston 4 tops, air enters in the cylinder by the valve cake 62 that inlet hole 41 backs down suction valve 6.When piston 4 was up, 62 of valve cakes covered on the inlet hole 41, and the air in the cylinder is compressed and discharges, and realized the pressurization degassing function.

As can be seen from Figure 1,, prolong the working life of product, be embedded with the lining 12 that metallic material is made in cylinder liner 11 in order to increase the wear-resisting property of cylinder liner 11.

As can be seen from Figure 1, described venting gas appliance 5 includes the housing 51 of exhaust fitting 53, can be sleeved on the fixed base 52 on the cylinder liner 11, at the middle part of fixed base 52 exhaust port 54 and air release valve hole 55 are arranged respectively, the valve rod 71 that rubber material is made the outlet valve 7 of umbrella is embedded in the air release valve hole 55, and valve cake 72 covers exhaust port 54 outlet sides, and the pressure stabilizing cavity 56 in the housing 51 connects exhaust fitting 53 and exhaust port 54.When piston 4 is up, air in the compression cylinder also backs down valve cake 72 from exhaust port 54, enter in the pressure stabilizing cavity 56, because the connection area of pressure stabilizing cavity 56 is more much bigger than the connection area of exhaust port 54, so, pressurized air makes pressure stability through diffusion after entering pressure stabilizing cavity 56, is discharged by exhaust fitting 53 by it again.

As can be seen from Figure 3, for simplified assembling process, enhance productivity and reduce expenses, the utility model is that upper machine body 12 and lower body 13 fastenings form with body 1 design, one end of upper machine body 12 is articulated on the lower body 13, the other end has open-work 121, with corresponding one of open-work 121 convex parts 131 that can snap in the open-work 121 is arranged on the lower body 13.After packing into motor 2 and other parts in the upper machine body 12, lower body 13 and upper machine body 12 are fastened, at this moment, convex parts 131 snaps in the open-work 121, make upper machine body 12 and lower body 13 be combined into an integral body, save the human and material resources and the time of cartridge screw, tight screw, made things convenient for workman's operation.

Claims

1. piston type micro air pump, comprise body (1), be fixed in motor (2) in the body (1) and the venting gas appliance (5) that is fixed in body (1) top, it is characterized in that: described body (1) is provided with cylinder liner (11), be fixed with crank throw (22) on the output shaft (21) of motor (2), one end of connecting rod (3) is enclosed within on the crank throw neck (221) of crank throw (22), the other end is connected with the piston (4) that can move reciprocatingly in cylinder liner (11), inlet hole (41) and inlet valve hole (42) are arranged at the top of this piston, the valve rod (61) that rubber material is made the suction valve (6) of umbrella is embedded in the air valve hole (42), and its valve cake (62) then covers on the mouth at inlet hole (41) piston (4) top.

2. piston type micro air pump according to claim 1 is characterized in that: described cylinder liner (11) is embedded with the lining (12) that metallic material is made.

3. piston type micro air pump according to claim 1 and 2, it is characterized in that: described venting gas appliance (5) includes the housing (51) of exhaust fitting (53), can be sleeved on the fixed base (52) on the cylinder liner (11), exhaust port (54) and air release valve hole (55) are arranged respectively at the middle part of fixed base (52), the valve rod (71) that rubber material is made the outlet valve (7) of umbrella is embedded in the air release valve hole (55), and valve cake (72) covers exhaust port (54) outlet side, and the pressure stabilizing cavity (56) in the housing (51) connects exhaust fitting (53) and exhaust port (54).

4. piston type micro air pump according to claim 1, it is characterized in that: described body (1) is that upper machine body (12) and lower body (13) fastening form, one end of upper machine body (12) is articulated on the lower body (13), the other end has open-work (121), and lower body (13) is gone up and corresponding one of open-work (121) has the convex parts (131) that can snap in the open-work (121).