CN2254496Y

CN2254496Y - Tyre valve inside for bicycle

Info

Publication number: CN2254496Y
Application number: CN 96229401
Authority: CN
Inventors: 李建民
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-03-06
Filing date: 1996-03-06
Publication date: 1997-05-21
Anticipated expiration: 2006-03-06

Abstract

The utility model relates to a bicycle tyre air valve which comprises an outer housing with a through hole, a piston which is arranged in the through hole and can freely move, and a pressing spring which is arranged below the piston, wherein, the bottom surface of the piston is gored by one end of the pressing spring, and the other end of the pressing spring is positioned on the lug boss of the inner surface of the middle segment of the through hole. The outer housing is composed of an air inlet cylinder positioned at the upper portion, a convex ring positioned at the middle portion and a sealing cone which is positioned at the lower portion and extends downwards and is gradually shrunk. The inner surfaces of the upper half portion of the through hole are an upper conical surface and a lower conical surface. The utility model can cause a tyre which is inflated to keep sealing, and air in an inner tyre does not easily leak. The utility model has convenient operation, low producing cost, and wide application.

Description

The bicycle tyre valve core

The utility model relates to bicycle, particularly a kind of valve inside of bicycle tyre inflation usefulness.

Nearly three kinds of existing tire for vehicles valve inside: a kind of is old-fashioned bike metal valve inside, and with anti-gas-leak, because little rubber is aging easily, so working life is shorter at the little rubber of the pore place of valve inside suit; Another kind is bicycle piston type plastics valve insides, and it is to realize piston seal by the internal air pressure after the inflation greater than outer air pressure, and when inner tube of a tyre unsaturated vapor, its sealing was lost efficacy easily, and precision is wayward during fabrication; Also have a kind of automobile tire valve inside, must back down air tube during inflation and could inflate, use loaded down with trivial detailsly, make complicatedly, cost of production is higher, is usually used in high-grade bike, import motor-helping car, motorcycle and automobile.

In order to overcome the shortcoming of above-mentioned valve inside, the purpose of this utility model provides a kind of improved bicycle tyre valve core, and it keeps sealing after making tyre inflation, and nausea is difficult for leaking in making.

A kind of bicycle tyre valve core described in the utility model comprise the shell that has through hole and in through hole, be provided with can free-moving piston, it also is included in, and the one end that the piston below is provided with withstands the piston bottom surface, its other end is shelved on the stage clip on the inner face boss of through hole stage casing; Bulge loop and in the middle part of described shell is positioned at by a superposed air inlet cylindrical body, is positioned at the downward extension of being of bottom and contraction-like gradually O-ring cone is formed; The internal surface of upper half part of described through hole is upper and lower two conical surfaces, on one of them conical surface upward suction port extend and to be contraction-like gradually, conical surface inner face boss extension downwards also is contraction-like gradually under another, and the surface of following conical surface is provided with more than three can move down spacing convex tendon to the stage clip location and to piston; Described piston is cylindric, piston by the stage clip roof pressure in last conical surface so that suction port sealing.

The utility model one is by the piston in the through hole suction port to be sealed tightly, the 2nd, and utilize outer casing underpart O-ring cone to insert tightly in the valve inside sleeve to realize the circular cone sealing.

Below in conjunction with accompanying drawing the utility model is elaborated.

Fig. 1 is a kind of structural representation of bicycle tyre valve core.

Fig. 2 is that above-mentioned valve inside is packed in the valve inside sleeve and by the use schematic representation of locking nut locking.

Referring to Fig. 1 and Fig. 2, a kind of bicycle tyre valve core comprises the shell 2 that has through hole 1, and in through hole 1, be provided with can free-moving piston 3, it also is included in the stage clip 4 that piston 3 belows are provided with, stage clip 4 one ends withstand piston 3 bottom surfaces, and stage clip 4 the other ends are shelved on the inner face boss 5 in through hole 1 stage casing.

Bulge loop 7 and in the middle part of shell 2 is positioned at by a superposed air inlet cylindrical body 6, is positioned at the O-ring cone 8 of bottom and forms.O-ring cone 8 is downward extension and contraction-like gradually, so that when inserting valve inside sleeve 11, boss 12 on the inwall of O-ring cone 8 and valve inside sleeve 11 closely contacts, and generation extruding force, be pressed on the valve inside bulge loop 7 by locking nut 13 cards, and locking valve inside sleeve 11, realize best circular cone sealing.

The internal surface of upper half part of through hole 1 is upper and lower two conical surfaces, on one of them conical surface 9 upward suction port 14 extend and be contraction-like gradually, another down conical surface 10 downwards inner face boss 5 extend and also be contraction-like gradually.The surface of following conical surface 10 is provided with four vertical convex tendons, and these convex tendons can be located and piston 3 is moved down spacing to stage clip 4, make gas enter tube by through hole 1 and from the gap between the convex tendon.The piston 3 that is positioned at through hole 1 is cylindric, piston 3 by stage clip 4 roof pressures in last conical surface 9, so that suction port 14 sealing.When inflation, gas enters from suction port, and to pressing down from last conical surface, gas just enters tube from the through hole gap with piston; When inflation finished, inner tire internal air pressure came conical surface on the roof pressure piston arrives on the one hand, and pressured on the other hand spring will press piston head to push back conical surface, to realize the suction port sealing.

Shell of the present utility model is made by engineering plastics, and the O-ring cone of outer casing underpart has replaced normally used rubber seal, has obtained best sealing effect in the use with contacting of valve inside sleeve lining.

Claims

1, a kind of bicycle tyre valve core, it comprise the shell that has through hole and in through hole, be provided with can free-moving piston, it is characterized in that the one end that it also is included in the setting of piston below withstands the piston bottom surface, its other end is shelved on the stage clip on the inner face boss of through hole stage casing; Bulge loop and in the middle part of described shell is positioned at by a superposed air inlet cylindrical body, is positioned at the downward extension of being of bottom and contraction-like gradually O-ring cone is formed; The internal surface of upper half part of described through hole is upper and lower two conical surfaces, on one of them conical surface upward suction port extend and to be contraction-like gradually, conical surface inner face boss extension downwards also is contraction-like gradually under another, and the surface of following conical surface is provided with more than three can move down spacing convex tendon to the stage clip location and to piston; Described piston is cylindric, piston by the stage clip roof pressure in last conical surface so that suction port sealing.