Bi-directional hand inflator piston

Abstract

The invention relates to a bi-directional hand inflator piston. The piston comprises a piston body. An inner bore and an outer bore are formed in the central position of the piston body, characterized in that: a plurality of radially arranged separators is mounted between an upper surface and a lower surface of the piston body. By using the separators, the space between the upper surface and the lower surface is divided into both air intake and air outlet guide chambers. The air intake and air outlet guide chambers are not communicated to each other. The air intake guide chamber is communicated to a space within the inner bore. The air outlet guide chamber is communicated to a space between the outer bore and the inner bore. A first cover plate is fixed at an outer end opening between two separators dividing to form the air intake guide chamber, for covering the outer end opening. A second cover plate is fixed at an outer end opening between two separators dividing to form the air outlet guide chamber, for covering the outer end opening. Only two cover plate components of the whole piston need to be additionally fixed by adhesion, so that the assembling is more convenient, the cost is low, and the air leakage possibility due to unstable adhesion is reduced.

Description

technical field [0001] The invention relates to a two-way pull air cylinder piston. Background technique [0002] At present, there are quite a lot of types of hand pumps (also called air pumps). There is a hand pump that can be inflated during the two-way stroke of pushing and pulling the handle. This kind of pump has the advantage of high inflation efficiency. [0003] Such as the Chinese utility model patent "two-way air pump" with the patent number ZL00255072.5 (the announcement number is CN2450405Y); the Chinese utility model patent "a two-way air pump" with the patent number ZL200620100394.9 (the announcement number is CN2874057Y); Both disclose a hand pump that can be inflated in two directions. [0004] The piston of this two-way inflatable hand-held air cylinder has such a characteristic that an air intake air guide chamber and an air outlet air guide chamber are arranged inside the piston, and air is formed on the surface of the upper and lower pistons of the air ...

AI Technical Summary

Problems solved by technology

[0005] This kind of piston has a defect. Each piston needs to weld and stick four parts (two side plugs and two valve bases), so the labor cost is high. In addition, due to the many bonding parts, these parts are not welded. Or the possibility of air leakage or falling due to strong bonding is also high; moreover, since the piston ring is directly installed on the outer periphery of the piston body, this will occupy a certain surface area of ​​the piston, making the area of ​​the valve port on the piston smaller. The air volume of the piston is small. When this kind of piston is used on a hand pump, it will be more laborious to use

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