CN2576516Y

CN2576516Y - Tyre air-pressure monitor

Info

Publication number: CN2576516Y
Application number: CN 02259668
Authority: CN
Inventors: 窦宝善
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-10-11
Filing date: 2002-10-11
Publication date: 2003-10-01
Anticipated expiration: 2012-10-11

Abstract

The utility model relates to a tyre air pressure monitor which is composed of a dust-proof cap with an air pressure electrical switch, an air valve core with a monitoring valve core, an electronic data encoding transmitting apparatus, a corresponding receiving apparatus and a sound and light display terminal. When the tyre air pressure is higher or lower than the rated air pressure, the monitoring valve core introduces high air pressure in the tyre into a normal pressure cavity (14); then, an isolation membrane sheet (4) of the air pressure electrical switch is pressed to project forwards, a comb-shaped electrode or a normally open contact is closed, and the data encoding transmitting apparatus is started to transmit encoding data; after the receiving apparatus receives and decodes the encoding data, the abnormal tyre air pressure is indicated by sound and light signals, and consequently, traffic accidents caused by tyre damage are avoided.

Description

A kind of tire air pressure monitoring device

(1) technical field: the utility model relates to a kind of device of monitoring tire pressure, especially by the Pressure monitoring spool, air pressure electric switch, monitoring data is wireless and/or the vehicle frame hard ware transmits emission, receiving device form with acousto-optic warning tire pressure superpressure or under-voltage monitoring device.

(2) background technology: still do not have matured product at present and appear on the market, institute caused the cross section modification and monitors the air pressure deficiency indirectly when the car trial product just detected low tyre according to reports and individually; The ZL0122952.4 patent then is mounted in the air pressure valve on the cranked tire valve, and this spring backs down seal valve when air pressure is not enough to compress the air pressure valve inner spring, makes tire inner high voltage air-flow blow the set reed of valve body and sends birdie and inform the ambient pressure deficiency.

Tire cross-section distortion is too big and can't bear tire weather-proof usage condition as check point, error.Utilize tire inner high voltage air-flow to blow a whistle and inform that the not normal mode of extraneous tire pressure can make the very fast emptying of tire internal gas pressure, tire pressure is lower than specified air pressure under a lot of situations though cause, but can also adhere to becoming and to cast anchor, and birdie might pass less than the driver in some cases and locates to maintenance point or inflation point.

Simultaneously above-mentioned two class schemes can only detect low tyre, can not detect outside air temperature when high or tan by the sun or tire internal gas pressure surge that long-distance driving causes, and then situation about may blow out.

(3) summary of the invention: the utility model provides a kind of device of monitoring tire pressure, can both use acousto-optic warning when the tire internal gas pressure is higher or lower than specified air pressure range, and acousto-optic warning device can place and makes things convenient for person for driving a car's supervision place.

Realize the technical matters that above-mentioned functions must solve: the two limit of the pressure variation monitoring point that 1. meets under the mode prerequisites such as routine inflation, dismounting and use that have tire now is provided with; 2. compatible current valve inside is not done any change to cranked tire valve; 3. air pressure sampling and data transfer and difference show; 4. the harsh environment that adapts to tire round-the-clock and various road conditions in using.

The technical scheme that the utility model is taked is: a valve inside that installs superpressure valve port and under-voltage valve port is installed as the monitoring spool in each cranked tire valve that need monitor, a dust cap that installs air pressure electric switch is installed on the valve mouth, is made and form a fully enclosed common pressure chamber between the two; Data coding feedway of air pressure electric switch control and corresponding receiver devices; When the tire internal gas pressure maintained rated range, the monitoring spool was in closed condition, and common pressure chamber does not have pressure, and air pressure electric switch is in the normally open position, and feedway, receiving device are in static state; Then corresponding valve port is opened when certain tire internal gas pressure exceeds or is lower than specified air pressure range, tire inner high voltage air-flow enters common pressure chamber and promotes the air pressure electric switch closure, start the coded data that feedway sends this tire, be delivered to receiving device through aerial and/or vehicle frame hard ware, start corresponding sound and light signal after decoding, aud. snl. can be that language informs that directly this tire pressure of the personnel of driving is not normal.

Valve inside that present design relates to and dust cap, its occupation mode and basic configuration, volume are with the same and conventional valve adapted of current product, data coding feedway is selected paster and miniature components and parts assembling, whole small for use, and circuit layout is the not closed then not power consumption of air pressure electric switch, and adopt whole sealing resin to bear the service conditions of round-the-clock and various road conditions, make its monitor reliably tire pressure whether over range so that in time handle, with the traffic accident of avoiding damaged tyres and causing because of damaged tyres.

(4) description of drawings: Fig. 1 is a Pressure monitoring part-structure longitudinal section of the present utility model;

Fig. 2 is the integral structure diagram of circuit;

Power supply control scheme drawing when Fig. 3 is feedway employing conductive rubber.

Among Fig. 1: the dust cap of dust cap body 1, comb electrode printed circuit board (PCB) 2, conductive rubber block 3, isolation diaphragm 4, formation band air pressure electric switch.The axis of guide 5, valve core body 6, gum cover 7, under-voltage spring 8, under-voltage valve port 9, valve pad 10, superpressure spring 11, superpressure valve port 12, pressure limiting ring platform 20 constitute the valve inside of monitoring spool.Dust cap and valve inside are installed on the gas nozzle body 13 routinely, form common pressure chamber 14.Moving contact reed 15, break back contact reed 16 constitute the air pressure electric switch of another kind of material among Fig. 2.Outer silk locking cap 17, body 18 constitute the monitoring spool of another kind of structure.Air pressure electric switch is electrically connected the data coding feedway that is made of data coding unit circuit BM, transmission circuit TX, power supply DC through lead 19.TX-1 is numbered data coding feedway, TX-n on 1 the tire to be numbered data coding feedway on the tire of n.RX-Z is total receiving device, is made up of receiving element circuit RX, data decode element circuit JM, acousto-optic display unit circuit HAHL.Coding unit electronic switch VT among Fig. 3 ₁, coding transmitter unit electronic switch VT ₂, power supply DC is the circuit structure of air pressure electric switch when adopting conductive rubber.

(5) specific embodiment: in longitudinal section shown in Figure 1, being installed in the seal rubber sleeve 7 that is with on the valve core body 6 in the gas nozzle body 13 is pressed on gas nozzle body 13 inwall reducing places, makes the gas nozzle body inner chamber be divided into front and back two parts, leading portion communicates with oral area, and trailing portion communicates with tyre cavity.Be with under-voltage spring 8, valve pad 10, superpressure spring 11 successively on the axis of guide 5 of perforation finite displacement before and after valve core body 6 centers can be vertically, under-voltage spring 8 one ends are supported in that valve core body 6 front portions, the other end withstand on the fixing pressure limiting ring platform 20 in the axis of guide 5 middle parts, platform 20 is pressed on valve pad 10 front end faces, and an end of superpressure spring 11 is supported in valve pad 10 aft end faces, the other end withstands on the axis of guide 5 afterbodys, valve pad 10 is close on the platform 20.Valve pad 10 overall diameters are slightly larger than the axis of guide 5 diameters of axle greater than valve core body 6 breech face overall diameters and median pore diameter; Pressure limiting ring platform 20 diameters are greater than valve pad 10 median pore diameter and less than valve core body 6 breech face interior diameters.So because the axis of guide 5 can form under-voltage valve port 9 by axial front and back, court of a feudal ruler finite displacement between the breech face of valve pad 10 and valve core body 6, the bullet tension force Q.E value of under-voltage spring 8 acts on the pressure D.p value of valve pad 10 more than or equal to the specified air pressure lower limit of tire, therefore then under-voltage valve port 9 was opened when tire pressure was lower than specified air pressure range lower limit, anticyclonic pressure enters gas nozzle body 13 front portions through valve core body 6 inner chambers, otherwise opposite, under-voltage valve port 9 is airtight always; In like manner between pressure limiting platform 20 and valve pad 10 front end faces and mesopore, form superpressure valve port 12, the bullet tension force C.E value of superpressure spring 11 acts on the pressure T.p value of pressure limiting platform 20 smaller or equal to the specified limit value atmospherically of tire, therefore then superpressure valve port 12 was opened when tire pressure was higher than specified air pressure range higher limit, anticyclonic pressure enters gas nozzle body 13 front portions through valve core body 6 inner chambers, otherwise opposite, superpressure valve port 12 is airtight always.

Be installed in the dust cap body 1 of gas nozzle body 13 oral areas, fixing the air pressure electric switch main body that printed circuit board (PCB) 2 that is shaped on two alternate electrodes of pectination and the isolation diaphragm that is fixed with conductive rubber block 34 are formed; The effect of isolation diaphragm 4 is after dust cap body 1 and gas nozzle body 13 oral areas screw, forms common pressure chamber 14 at gas nozzle body 13 leading portions.When tire pressure is in specified air pressure range value, keep atmospheric pressure state in the common pressure chamber 14, air pressure electric switch is in the normally open position.When a certain tire pressure is higher or lower than specified air pressure range, superpressure valve port 12 or under-voltage valve port 9 open, anticyclonic pressure enters common pressure chamber 14 compressing isolation diaphragms 4 lordosis, makes conductive rubber block 3 be adjacent to printed circuit board (PCB) 2 in the tire, connects two electrodes on the plate; Two electrodes are electrically connected the data coding feedway TX-1/n of these tires through lead 19, and wherein lead electric connection of power supply, another root lead are electrically connected electronic switch VT ₁The control utmost point makes VT ₁Conducting, log-on data coding unit circuit BM, outputting encoded data level control electronic switch VT ₂Conduction and cut-off makes transmitter unit circuit TX outwards send encoded data signal, this signal through wireless and/or vehicle frame hard ware be delivered to total receiving device RX-Z, after receiving element circuit RX receive to amplify, be transported to data decode circuitry JM, decoding back level signal is passed to sound and light show circuit HAHL through the corresponding output end oral instructions, sends the not normal sound and light signal of this tire pressure of indication.

Certainly comb electrode printed circuit board (PCB) 2, the conductive rubber block 3 in the dust cap body 1 also can substitute with the structure of break back contact reed 16, moving contact reed 15, when in the common pressure chamber 14 anticyclonic pressure being arranged, 15 reaches and break back contact reed 16 closures of isolation diaphragm lordosis compressing moving contact reed, sound contact reed is connected in data coding feedway electric power loop by lead 19, and this device of closed power initiation outwards sends the coded data carrier wave.

The monitoring spool also can be used another kind of structure: inner chamber afterbody and body 18 upper ends with outer silk locking cap 17 connect to form valve core body 6 with shift sleeve structure; Be with superpressure spring 11, under-voltage spring 8, valve pad 10 on the axis of guide 5 successively, superpressure spring 11 1 ends are supported in the end that outer locking cap 17 front portion, the other end act on body 18 upper ends and under-voltage spring 8, and under-voltage spring 8 other ends act on the valve pad 10 that is fixed on the axis of guide 5 afterbodys; When outer silk locking cap 17 is tightened on gas nozzle body 13 inner chambers, superpressure spring 11 gum cover 7 that will be fixed on body 18 middle parts is pressed on gas nozzle body 13 inner chamber reducing places, gas nozzle body 13 inner chambers are divided into before and after two parts, leading portion communicates with gas nozzle body 13 oral areas, and trailing portion communicates with tyre cavity.The bullet tension force Q.E value of under-voltage spring 8 acts on the pressure D.p value of valve pad 10 more than or equal to the specified air pressure lower limit of tire, being lower than specified air pressure range lower limit is then opened by the under-voltage valve port 9 that forms between valve pad 10 front end faces and body 18 breech faces, anticyclonic pressure enters gas nozzle body 13 front portions through body 18 inner chambers, otherwise opposite, under-voltage valve port 9 is airtight always; Pressure T.p value on the trailing portion of the gas nozzle body 13 that the bullet tension force C.E value of superpressure spring 11 acts on smaller or equal to the specified limit value atmospherically of tire, gum cover 7 and body 18 were promoted to move superpressure valve port 12 unlatchings that formed by gum cover 7 and gas nozzle body 13 inner chamber reducing places to the front portion by anticyclonic pressure when tire pressure was higher than specified air pressure range higher limit, anticyclonic pressure enters gas nozzle body 13 leading portions, otherwise opposite, the high pressure valve port is airtight always.

In the foregoing description, the ripe circuit of encoding and decoding and sending and receiving apparatus is a lot, and much has been fixed to module and appears on the market, and electrical schematic diagram is omitted.Trickle power supply that not power consumption of the not closed then data coding of the air pressure electric switch of explaining in preamble feedway what is called, the leakage current that does not comprise components and parts in the circuit and/or partial circuit structure are required that is the power consumption under the so-called dormant state.

Claims

1, a kind of tire air pressure monitoring device, especially utilize the tire air pressure monitoring device of given condition of common valve and occupation mode, this device is made of the dust cap that has original function and occupation mode concurrently, valve inside, data coding feedway and total receiving device, it is characterized in that: be provided with air pressure electric switch in the dust cap, valve inside is provided with two limit monitoring spools; Described dust cap, valve inside form a fully enclosed common pressure chamber (14) therebetween when occupation mode is installed on the cranked tire valve body that is inflated to specified air pressure range routinely; When the tire internal gas pressure is higher or lower than specified air pressure range, the valve port of corresponding two limit monitoring spools is opened, anticyclonic pressure charges into common pressure chamber (14) compressing dust cap body (1) internal gas pressure electrical switch closes thus in the tire, log-on data coding feedway is the encoded data carrier of emission outwards, this carrier wave through wireless and/or vehicle frame hard ware be passed to data sink decoding back promote this coding of correspondence the acousto-optic display terminal, send corresponding sound and light signal.

2, tire air pressure monitoring device according to claim 1, it is characterized in that: valve core body (6) is provided with two limit monitoring spools of under-voltage valve port (9) and superpressure valve port (12) structure, under routine was installed and used condition, specified air pressure compressed under-voltage valve port (9) in the tire, superpressure spring (11) compresses superpressure valve port (12); When tire pressure is lower than specified air pressure range, under-voltage spring (8) bullet opens, under-voltage valve port (9) is opened; When tire pressure overruns, superpressure spring (11) is compressed, superpressure valve port (12) is opened.

3, tire air pressure monitoring device according to claim 1 is characterized in that: be provided with the printed circuit board (PCB) (2) that is printed with 2 electrodes in the dust cap body (1) and be fixed with the air pressure electric switch that conductive rubber block (3), isolation diaphragm (4) are formed; When anticyclonic pressure in the tire enters common pressure chamber (14), compressing isolation diaphragm (4) lordosis, make conductive rubber block (3) be adjacent to printed circuit board (PCB) (2) two electrodes, make it to realize that electricity connects.

4, tire air pressure monitoring device according to claim 1 is characterized in that: the air pressure electric switch structure that is provided with in the dust cap body (1) also can have moving contact reed (15), break back contact reed (16), isolation diaphragm (4) to form; When anticyclonic pressure enters common pressure chamber (14) in the tire, compressing isolation diaphragm (4) lordosis, promote moving contact reed (15) and shift to break back contact reed (16) and makes two closing of contact, realizes that electricity connects.

5, tire air pressure monitoring device according to claim 1 is characterized in that: two electrodes in the air pressure electric switch are electrically connected the interior power end of data coding feedway and the electronic switch VT of coding unit (BM) by lead (19) respectively ₁The control utmost point.

6, tire air pressure monitoring device according to claim 1 is characterized in that: the dynamic and static contact reed that air pressure electric switch adopts is electrically connected in the data coding feedway by lead (19) respectively and is connected in series with in the electric power loop as source switch.