CN2200062Y

CN2200062Y - Multipurpose air pump for bicycle

Info

Publication number: CN2200062Y
Application number: CN94212898U
Authority: CN
Inventors: 孙玉山
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-06-03
Filing date: 1994-06-03
Publication date: 1995-06-07
Anticipated expiration: 2004-06-03

Abstract

The utility model relates to an air charging device for a tire of a bicycle or an analogous vehicle. The upper and the lower sides of a big piston seal groove are made to glidingly cooperate with an O-shaped seal ring and an interval structure is arranged between the bottom of the groove and the O-shaped seal ring. An artificial charging mouth is arranged on a shaft line which intersects with a shaft line of a pressure regulating valve orthogonally and a seal ring of the artificial charging mouth is arranged between the external wall of an upper cover and a step of the charging mouth. A brake valve tube is glidingly connected and sealed with the upper cover by adhesive. The utility model has the advantages of reliable operation, favorable inflation effect, perfect performance, convenient use and effective service life extension of the tire.

Description

Multipurpose air pump for bicycle

The utility model relates to a kind of inflator of bicycle and similar vehicles tire.

Bicycle, tricycle, Wheelchair car etc. are given tyre inflation, more generally adopt pump or electric air pump manually to be its inflation at present, this mode except that effort comparatively, time-consuming, be subjected to the restriction of environmental conditions toward contact.Can not be standby whenever and wherever possible, very inconvenient in the use.

But the miniature automatic inflation pump technology of a kind of bicycle pressure regulation is disclosed in ZL93241078.2.It mainly is made of gas-filled pump and cam pack two large divisions, is installed in the wheel shaft place of vehicle, around cam rotation, makes air pump piston reciprocating action by the operation band gas-filled pump of wheel, forms pressurized air, is tyre inflation.This air pump can be inflated automatically, automatic Regulation, owing to install, can give tyre inflation whenever and wherever possible with car.But its main deficiency is: functional reliability is poor, the inflation effect is not good enough, still have inconvenient part in the use, as the groove of big piston and cylinder barrel sealing part, bottom land (radially) is a drive fit with O RunddichtringO internal diameter, upper and lower sides is gapped, i.e. matching relationship design routinely because cylindrical shell and loam cake all do not have inlet hole, forms vacuum when often causing the big piston backhaul, can't air inlet, influence the proper functioning of gas-filled pump; The manual inflation chew and loam cake between sealing gasket be installed in the bottom, hole of loam cake, because extrusion-deformation, normal appearance can't be inflated phenomenon, in addition, the manual inflation chew with pressure regulator valve be in the perpendicular same center line of wheel axis on, the manual inflation is chewed be in the intensive axial region medial area of spoke, be not easy to inflation; For being threaded, add the sealing of O type circle between brake valve pipe and loam cake, because the aperture is little, both are difficult for guaranteeing that pressure does not increase with one heart, influence inflation effect.Be again, when the gas-filled pump self-locking, stop inflation after, tire pressure descends, and when not reaching the minimum pressure section of opening self-locking, does not have manually opened self-locking device, also can influence tire working life.

The purpose of this utility model is to avoid deficiency of the prior art, and a kind of reliable operation is provided, good charging, and use more convenient multipurpose bicycle gas-filled pump product.

Can take following technological scheme to realize purpose.On the basis of ZL932410782, the upper and lower sides of big piston sealed groove made to be with O-ring seals be slidingly matched gapped structure between groove bottom and O-ring seals; The manual inflation chews on the axis that is installed in the pressure regulator valve orthogonal axe, and its seal ring is installed between the step that cover outer wall and inflation chew; Between brake valve pipe and loam cake for transition fit is connected, and with adhesive seal.

In conjunction with the accompanying drawings, mode of execution is described in further detail the content of the technical program.

Fig. 1 is a kind of structure sectional view of this multipurpose bicycle gas-filled pump.

Fig. 2 is the plan view of Fig. 1.

This multipurpose bicycle gas-filled pump is the same with ZL93241078.2 also to be made of gas-filled pump and cam pack two large divisions, be installed in the wheel shaft place of vehicle, drive gas-filled pump around cam rotation, make air pump piston come and go action by the operation of wheel, form pressurized air, be tyre inflation.Just the upper and lower sides (axially) of the big piston sealed groove (1) of gas-filled pump and O RunddichtringO (2) are and are slidingly matched, gapped between groove bottom (radially) and O-ring seals, even form air chamber between the bottom land of big piston sealed groove and O-ring seals, enough air quantities are arranged when guaranteeing backhaul, big piston can move downward under the effect of tower spring, back and forth movement work reliably.(3) axis is chewed in inflation and the pressure regulator valve orthogonal axe is installed, even the axis that inflation is chewed is consistent with the wheel axis direction, the manual inflation chews just toward the outer side like this, and manual inflation's time space position is unrestricted, and is flexible; Inflation is chewed sealing gasket (4) between (3) and loam cake (5) and is installed in cover outer wall and inflates between the step of chewing, and has both guaranteed sealability, make again inflate smooth and easy, reliably.Be connected for transition fit between brake valve pipe (6) and loam cake (5), and with adhesive seal, guarantee the concentricity in brake valve pipe and loam cake gas circuit duct to guarantee sealing with transition fit, so just not smooth and so on the phenomenon of gas or gas circuit can not occur leaking with tackiness agent.Except that above several places improved, the other parts structure of gas-filled pump, functional relationship, course of action etc. and cam pack integral body did not all have difference with prior art.

Wheel operation, band gas-filled pump are around cam rotation, and by the effect of spring force, the steel ball of big piston end contacts with cam always, and when contacting a circulation time with cam peak and minimum point, big piston is finished a pressurized air and an air-breathing process.During pressurized air, pressurized air with the one-way valve opens in the loam cake, by joint, breathing pipe enter tire, for its inflation.When air-breathing, closed check valve, big piston is air-breathing by the effect of tower spring.Gas-filled pump periodic duty like this.After pressure reaches predetermined pressure (when being applied to pressure on the pressure regulator valve spring and O-ring seals and pressure regulator valve inner hole friction force sum), pressurized air is opened pressure regulator valve, pressurized air enters in the small piston by the brake valve pipe, three steel balls that the promotion small piston moves down, pushes away in the big piston outwards move, steel ball blocks mutually with the chamfering of guide sleeve, big piston end steel ball and cam are thrown off, stop inflation.Air quantity reduces in tire, and when pressure is lower than predetermined pressure (less than spring force), pressure regulator valve is return under spring action, and small piston moves upward under self spring action, and steel ball return, big piston are got back to working state again, are tyre inflation.

Inflation pressure can be adjusted by female realization of the rotation pressure regulation back of the body.

Chew by the manual inflation, adopting electric air pump or pump can manually be its inflation.After new car dispatches from the factory or stops using for a long time, earlier manually being charged to half gas, the vehicle that reruns, by gas-filled pump automatically inflation avoid damaging tire for well.

On said structure, also manually opened self-locking device can be set.Example also is provided with manual pushbutton (8) on the spool of pressure regulator valve (7) in the gas-filled pump as shown in drawings.After big piston quits work, be the gas-filled pump self-locking, stop the inflation after, operation a period of time, the tire internal air pressure can descend, be declined by less than the minimum pressure section of opening self-locking again this moment again, and the bicycler only needs inwardly to promote manual pushbutton (8) when being ready tire foot fate row, can enter automatic inflated condition.The upper and lower cover housing of this gas-filled pump is made monolithic construction, and sealability is better.

The relative prior art of the utility model has following advantage:

1, make the work of adjustable pressure small auto-inflating pump for bicycle more reliable, the inflation effect is better, and performance is more perfect;

2, use is convenient, can effectively prolong Using Life of Tyre.

Claims

1, a kind of multipurpose bicycle gas-filled pump, it is made of gas-filled pump and cam pack two large divisions, it is characterized in that: the upper and lower sides of big piston sealed groove (1) and O-ring seals (2) be slidingly matched, gapped between groove bottom and O-ring seals; The manual inflation chews (3) axis and the pressure regulator valve orthogonal axe is installed, and its sealing gasket (4) is installed in loam cake (5) outer wall and inflates between the step of chewing; Between brake valve pipe (6) and loam cake for transition fit is connected, and with adhesive seal.

2, multipurpose bicycle gas-filled pump as claimed in claim 1 is characterized in that: the spool of pressure regulator valve (7) is provided with manual pushbutton (8) in the gas-filled pump.