CN201218176Y

CN201218176Y - air pump

Info

Publication number: CN201218176Y
Application number: CNU2008200505311U
Authority: CN
Inventors: 朱海波
Original assignee: Dongguan Shiyi Electronic Co ltd
Current assignee: Dongguan Shiyi Electronic Co ltd
Priority date: 2008-07-11
Filing date: 2008-07-11
Publication date: 2009-04-08
Anticipated expiration: 2018-07-11

Abstract

The utility model relates to the technical field of an inflation device, in particular to an inflation pump, which comprises an air outlet valve, a cylinder, a piston, a connecting rod, a cam and a main shaft, wherein the air outlet valve is arranged at the top of the cylinder, the piston is arranged inside the cylinder in a sliding way, the cam is sleeved on the main shaft, an offset distance is arranged between the axis of the main shaft and the axis of the cylinder, the top of the connecting rod is fixedly connected on the bottom of the piston, the bottom of the connecting rod extends out of the cylinder and is connected with the cam, the utility model utilizes the offset distance between the axis of the main shaft and the cylinder to change the matching angle between the piston and the cylinder to form a gap, thereby naturally feeding air from the bottom of the cylinder, compared with the prior art, because an air inlet valve is cancelled, the air inlet resistance is not generated when the inflation pump feeds air, when the inflation pump compresses the air, the air leakage caused by poor sealing, the structure is simplified, the volume can be made smaller, and the installation is more convenient.

Description

Inflating pump

Technical field:

The utility model relates to the inflator technical field, and particularly a kind of is the portable inflating pump of automobile tire, small containers such as ball inflation.

Background technique:

Automobile tire, small containers such as ball often all need to utilize inflating pump to inflate could normally to use.Present inflating pump generally comprises suction valve, gas outlet valve, cylinder, piston, connecting rod, cam, main shaft etc., suction valve is arranged on the bottom of cylinder, gas outlet valve is arranged on the top of cylinder, piston is slidingly arranged in the inside of cylinder, cam is socketed on the main shaft, the top of connecting rod and the bottom-hinged of piston, the bottom and the cam of connecting rod are hinged.The air inlet principle of this inflating pump is to be moved reciprocatingly along cylinder by the cam driven piston, and when piston down moved from top dead center, cylinder produced negative pressure, and when negative pressure during greater than the resistance of suction valve, INO, inflating pump begins air inlet; On the contrary, when piston up moved from lower dead center, cylinder produced malleation, and when malleation during greater than the resistance of gas outlet valve, gas outlet valve is opened, and inflating pump begins to give vent to anger.Because this inflating pump used suction valve, there are intake resistance and air leakage, make intake efficiency lower, and suction valve increased the complexity of inflating pump structure, limited the volume of inflating pump and can't do lessly.

The model utility content:

The purpose of this utility model is to provide a kind of intake efficiency high inflating pump at the deficiencies in the prior art, it has cancelled suction valve, utilize the axle center offset distance of main shaft and cylinder, fit angle between piston and the cylinder is changed and form the gap, and then from the cylinder bottom natural inflow, the air leakage of eliminating intake resistance and producing because of suction valve.

For achieving the above object, the utility model adopts following technological scheme:

Inflating pump, it includes gas outlet valve, cylinder, piston, connecting rod, cam, main shaft, gas outlet valve is arranged on the top of cylinder, piston is slidingly arranged in the inside of cylinder, cam is socketed on the main shaft, be provided with offset distance between the axle center of main shaft and the axle center of cylinder, the roof anchorage of connecting rod is connected on the bottom of piston, and the bottom of connecting rod is stretched out cylinder and is connected with cam.

Off-centre convexes with projection on the described cam face, and the bottom of connecting rod is set on the projection and with projection and is rotationally connected.

Be socketed with gear on the described main shaft.

Described connecting rod is vertical mutually with piston.

Described connecting rod and piston are integral structure.

The utility model beneficial effect is: the utility model includes gas outlet valve, cylinder, piston, connecting rod, cam, main shaft, gas outlet valve is arranged on the top of cylinder, piston is slidingly arranged in the inside of cylinder, cam is socketed on the main shaft, be provided with offset distance between the axle center of main shaft and the axle center of cylinder, the roof anchorage of connecting rod is connected on the bottom of piston, the bottom of connecting rod is stretched out cylinder and is connected with cam, the utility model utilizes the axle center offset distance of main shaft and cylinder, fit angle between piston and the cylinder is changed and form the gap, and then from the cylinder bottom natural inflow, the utility model compared with prior art owing to cancelled suction valve, does not have intake resistance when the inflating pump air inlet, when inflating pump pressurized air, can not produce air leakage because of the poor sealing of suction valve, improve the intake efficiency of inflating pump, simplify the structure, can do volume less, and install and carry convenient.

Description of drawings:

Fig. 1 is a sectional view of the present utility model;

Fig. 2 is a user mode sectional view of the present utility model.

Embodiment:

Below in conjunction with accompanying drawing the utility model is further described, see Fig. 1-2, inflating pump, it includes gas outlet valve 1, cylinder 2, piston 3, connecting rod 4, cam 5, main shaft 6, gas outlet valve 1 is arranged on the top of cylinder 2, piston 3 is slidingly arranged in the inside of cylinder 2, cam 5 sockets are fixed on the main shaft 6, be provided with offset distance between the axle center of the axle center of main shaft 6 and cylinder 2, the rotating center of cam 5 is concentric with the axle center of main shaft 6, so also there is offset distance between the axle center of the rotating center of cam 5 and cylinder 2, the top vertical fixing of connecting rod 4 is connected on the bottom of piston 3, and connecting rod 4 constitutes integral type T-shape structure with piston 3, and the bottom of connecting rod 4 is stretched out cylinder 2 and is connected with cam 5, off-centre convexes with projection 51 on cam 5 end faces, and the bottom of connecting rod 4 is set on the projection 51 and with projection 51 and is rotationally connected.Be socketed with gear 7 on the main shaft 6, gear 7 drives by the motor (not shown).

Working principle of the present utility model is: motor drives main shaft 6 by gear 7 and rotates, cam 5 direction rotation in accordance with regulations, make cam 5 utilize offset distance between the axle center of its rotating center and cylinder 2, drive one-piece piston 3 is done in cylinder 2 inside and is pumped, when one-piece piston 3 when top dead center down moves, form the tilt angle between piston 3 and cylinder 2 inwalls, and the generation gap, thereby make air can be naturally enter cylinder 2 inside by the bottom of cylinder 2, when piston 3 up moves through lower dead center, tilt angle between piston 3 and cylinder 2 inwalls diminishes gradually, its gap also diminishes gradually until closing, inflating pump begins pressurized air, gas outlet valve 1 begins to open gives vent to anger, and repeating above-mentioned action then sustainable is that the ball small containers that waits of automobile tire is inflated.

The utility model is owing to cancelled suction valve, when the inflating pump air inlet, there is not intake resistance, when inflating pump pressurized air, can not produce air leakage because of the poor sealing of suction valve, improved the intake efficiency of inflating pump, simplify the structure, can do volume less, and install and carry convenient.

The above only is a better embodiment of the present utility model, so all equivalences of doing according to the described structure of the utility model patent claim, feature and principle change or modify, is included in the utility model patent claim.

Claims

1. An air pump, which includes an air outlet valve (1), a cylinder (2), a piston (3), a connecting rod (4), a cam (5), and a main shaft (6). The air outlet valve (1) is arranged on the cylinder (2) ), the piston (3) is slidingly arranged inside the cylinder (2), and the cam (5) is sleeved on the main shaft (6). It is characterized in that the axis of the main shaft (6) and the axis of the cylinder (2) Offset is provided between, the top of connecting rod (4) is fixedly connected on the bottom of piston (3), and the bottom of connecting rod (4) stretches out cylinder (2) and is connected with cam (5).

2. The air pump according to claim 1, characterized in that: the end surface of the cam (5) is eccentrically provided with a boss (51), and the bottom of the connecting rod (4) is sleeved on the boss (51) And be rotatably connected with boss (51).

3. The air pump according to claim 1, characterized in that a gear (7) is sleeved on the main shaft (6).

4. The air pump according to claim 1, characterized in that the connecting rod (4) and the piston (3) are perpendicular to each other.

5. The air pump according to any one of claims 1-4, characterized in that: the connecting rod (4) and the piston (3) are of an integral structure.