CN2089107U

CN2089107U - Spring valve inside for tyre of cart

Info

Publication number: CN2089107U
Application number: CN 90218880
Authority: CN
Inventors: 林纪平
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-08-29
Filing date: 1990-08-29
Publication date: 1991-11-20

Abstract

The utility model belongs to the technical field of the air valve tube inside installed on carts. The air valve tube inside of the traditional bicycles and carts uses a soft rubber tube to seal automatically, for which the air seal performance is poor and the soft rubber tube is likely to be worn. The utility model aims at providing an air valve tube inside with improved seal performance matched with the air valve used on the cart tube, thus, the valve inside can bring convenience to vehicle drivers and avoid the trouble caused by the frequent inflation and the unnecessary cost for inflation.

Description

Spring valve inside for tyre of cart

The utility model belongs to hand cart tyre valve cock valve inside technical field.

Existing commercially available hand cart tyre valve cock valve inside is assembled into by core body and the soft rubber tube that is placed in core body bottom cylindrical, does the automatic on-off sealing by the elastic force of soft rubber tube itself, so poor sealing performance.

The purpose of this utility model provides a kind of valve inside that relies on spring force as the enterprising air outlet hole mouth automatic on-off of valve inside power, in the hope of improving envelope gas performance.

For this reason, design one is protruded downwards on the endoporus upper-end surface of device spring on the utility model valve inside core body, there is the thin walled cylinder of little vent the centre.Thin walled cylinder lower end surface (or can be described as little vent lower end mouth peripheral surface) is designed on the core body to contact with sealing gasket the sealing surface that seals.There is closing in the core body lower end, and closing in place bore is less than spring lower end external diameter, makes it to seal the spring of core body endoporus of packing into.The spring core print seat that heads on suitable for reading, the core print seat sealing gasket of adorning suitable for reading, sealing gasket are withstood on the thin walled cylinder lower end surface by spring force and seal the middle little vent lower end mouth of thin walled cylinder.

There is the thin walled cylinder of little vent the centre of protruding downwards on the utility model core body endoporus upper-end surface, and its cylindrical can be straight-tube shape, the tapering shape under also can be greatly.

Rubber seal of the present utility model changes seal ring and the gasket structure of soft rubber tubular type for the short type valve inside of conventional motor vehicle tyre valve, and the power of sealing gasket is again from spring.So sealing and cold-resistant thermal characteristics can reach the index of the short type valve inside of tradition.

Accompanying drawing is the utility model general assembly sectional drawing.

Embodiment: the step cutting pattern (6) on the utility model excircle shown in the accompanying drawing, its effect are similar to the microscler muscle of two symmetries on traditional hand cart tyre valve inside excircle.Step cutting pattern (6) is inserted the Valve tip body endoporus with the bottom, cover the dust cap threaded together, seal ring (3) promptly is in the compression seal state.During inflation, air-flow arrives the middle little vent lower end mouth (4) of thin walled cylinder, washes sealing gasket (5) open and enters the inner tube of a tyre.Turn off source of the gas, sealing gasket promptly relies on spring (2) power and tire internal air pressure recoil force to withstand on automatically on the thin walled cylinder lower end surface and seals.The closing in place compression of core body (1) lower end is also sealed spring (2) lower end, makes spring (2) lower end that the place be arranged.

Claims

1, a kind of hand cart tyre valve cock spring valve inside, by core body, around the seal ring at core body outer conical surface position, be installed on the spring of core body endoporus, place spring core print seat suitable for reading, be loaded on the sealing gasket of core print seat in suitable for reading and assemble, it is characterized in that: the thin walled cylinder one that protrude downwards, that there is little vent the centre is arranged on the endoporus upper-end surface of device spring on the core body, and there is closing in the core body lower end.

2, valve inside according to claim 1 is characterized in that: the centre of protruding downwards on the core body endoporus upper-end surface has the cylindrical of the thin walled cylinder of little vent to can be straight-tube shape, also can be big, following little tapering shape.

3, valve inside according to claim 1 is characterized in that: closing in place bore in core body lower end is less than spring lower end external diameter.