CN201066281Y - Waterproof rotary axis and telescopic swing electronic car speed odograph sensor - Google Patents
Waterproof rotary axis and telescopic swing electronic car speed odograph sensor Download PDFInfo
- Publication number
- CN201066281Y CN201066281Y CNU200620117570XU CN200620117570U CN201066281Y CN 201066281 Y CN201066281 Y CN 201066281Y CN U200620117570X U CNU200620117570X U CN U200620117570XU CN 200620117570 U CN200620117570 U CN 200620117570U CN 201066281 Y CN201066281 Y CN 201066281Y
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- rotating shaft
- shaft sleeve
- upper shaft
- hall element
- sensor
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Abstract
The utility model discloses an expandable swing type electronic speed odometer sensor with a waterproof rotating shaft for an electronic speed odometer. The sensor includes Hall elements, a rotating shaft with magnetic steel and a shell, and is characterized in that the sensor also includes a peripheral circuit and a seal cavity; the Hall elements and the peripheral circuit are mounted on a circuit board assembly; the seal cavity consists of a connector, a gasket and an upper shaft sleeve; the circuit board assembly is welded on the connector; the upper shaft sleeve is arranged in the shell; the gasket is arranged in the groove of the upper shaft sleeve; the rotating shaft with magnetic steel is rejected by a ferrule and sleeved in the upper shaft sleeve. The utility model overcomes the deficiencies of the prior art, and has the advantages of waterproof, preventing seizure of the rotating shaft and burnout of the Hall elements, etc.
Description
Technical field
The utility model relates to a kind of automobile instrument sensor, particularly a kind of water proof type rotating shaft telescopic oscillating formula electronic speedometer sensor that is used for the electronic type speedometer.
Background technology
Before the eighties in last century, automobile instrument is substantially based on mechanical type, and speedometer drives by the flexible axle that is installed on the wheel box.Along with developing of automobile industry, the application of electronic product on automobile more and more widely.To the nineties, automobile instrument develops into electronic type by mechanical type gradually.And in this evolution, electronization is exactly speedometer at first.What its adopted is that pulse signal drives, and this signal is input on the instrument by sensor, so the pointing accuracy of speedometer depends on instrument itself on the one hand, just depends on vehicle speed sensor on the other hand.The kind of vehicle speed sensor is a lot of at present, and magneto-electric, dry-reed, photo-electric and Hall-type etc. are arranged, and they all are mounted on the automobile gearbox, the function of flexible axle before replacing.Because magneto-electric, dry-reed and electro-optical pickoff shortcoming are many, therefore most employings at present is hall sensor.It is made up of the rotating shaft and the housing of Hall element, carry magnet.This sensor is to utilize the Hall effect of Hall element to make, rotating shaft rotation when carry magnet, when magnetic pole passes through Hall element, Hall element can produce switching pulse signal, and its signal amplitude is constant, is not subjected to the influence of rotating speed, because Hall element belongs to electronic switch, can open at a terrific speed, close, under high speed open and close state signal do not lose, undistorted, it can be exported buy car in installments fast mileometer of an extremely stable pulse signal and uses under the perfect condition.But equally also there are some shortcomings in this sensor, the one, its poor sealing, water proofing property is poor, rotating shaft, magnet and Hall element and other electronic component are in a chamber, because it is installed on the wheel box, to expose outside, long-time use always has some water can penetrate into the inside, cause Hall element and circuit generation corrosion, short circuit etc., so the life-span is not long; The 2nd, rotating shaft and body clearance are little, and be dumb, and sensor belongs to wheel box and being connected firmly, therefore very easily causes the stuck or wheel box driven tooth damage of rotating shaft, influences the indication accuracy of instrument, even do not work.In addition owing to electric parts on the automobile is a lot, operating mode is very complicated, this type of sensor of prior art does not much have peripheral circuit, even having of having is also very simple, just add a dropping resistor and a voltage stabilizing diode to Hall element, can not leach clutter and can not resist the reverse voltage impact, Hall element very easily damages, and causes sensor not work.
Summary of the invention
Technical problem to be solved in the utility model is, overcomes the defective that prior art exists, and a kind of water proof type rotating shaft telescopic oscillating formula electronic speedometer sensor that has the peripheral circuit that waterproof, the anti-stuck structure of rotating shaft and anti-Hall element burn is provided.
The technical scheme in the invention for solving the above technical problem is: this water proof type rotating shaft telescopic oscillating formula electronic speedometer sensor, comprise Hall element, the rotating shaft and the shell of band magnet steel, its design feature is: also comprise peripheral circuit and annular seal space, described Hall element and peripheral circuit are contained in circuit board group and close, described annular seal space is by edge connector, O-ring seal and Upper shaft sleeve constitute, the circuit board combination is welded on the edge connector, Upper shaft sleeve is cased, O-ring seal is contained in the groove of Upper shaft sleeve, and the rotating shaft of described band magnet steel is withstood by cutting ferrule and is sleeved in the Upper shaft sleeve.
Spring and steel ball are equipped with in perforate in the middle of the described rotating shaft of the utility model water proof type rotating shaft telescopic oscillating formula electronic speedometer sensor in the hole, steel ball heads on Upper shaft sleeve, and spring heads on steel ball.
The described peripheral circuit of the utility model water proof type rotating shaft telescopic oscillating formula electronic speedometer sensor includes diode, two voltage stabilizing diodes, resistance and two capacitance-resistances, the diode of forward connection and resistance string are connected in the positive pole of Hall element input end, between the voltage stabilizing diode of reverse connection in parallel and the input end that capacitance-resistance is attempted by Hall element, the voltage stabilizing diode and the capacitance-resistance of the forward connection that another is in parallel are attempted by between the Hall component output.
The utility model compared with prior art has the following advantages: 1, water-tight.Constitute an annular seal space by edge connector, O-ring seal and Upper shaft sleeve, O-ring seal is installed in the groove of Upper shaft sleeve, compress with the annular protrusion on the edge connector, play the water-tight effect, the circuit board combination is closed in this chamber, separate fully with rotating shaft with magnet steel, can not use water inlet to lose efficacy because of long-time.2, rotating shaft flexible swing, anti-jamming.Spring and steel ball are equipped with in perforate in the middle of the rotating shaft, and rotating shaft can freely be stretched between Upper shaft sleeve and cutting ferrule and swing, and the stuck or automobile gearbox driven tooth damage phenomenon of rotating shaft therefore can not occur.3, can avoid Hall element to burn.The Hall element of this sensor has peripheral holding circuit, and this peripheral circuit plays avoids Hall element IC to burn effect with stable output signal.
Description of drawings
Fig. 1 is the example structure synoptic diagram.
Fig. 2 is the electrical schematic diagram of the peripheral circuit of embodiment Hall element.
Embodiment
The utility model water proof type rotating shaft telescopic oscillating formula electronic speedometer sensor is a kind of hall sensor that utilizes Hall effect to make.The structure of embodiment sensor is referring to accompanying drawing.This sensor comprises the circuit board combination 2 that contains Hall element and peripheral circuit, by the annular seal space that edge connector 1, O-ring seal 3 and Upper shaft sleeve 4 constitute, and the rotating shaft 11 and the shell 5 of band magnet steel 6.Circuit board combination 2 is welded on the edge connector 1, and Upper shaft sleeve 4 is contained in the shell 5, and O-ring seal 3 is contained in the groove of Upper shaft sleeve 4, and the rotating shaft 11 of band magnet steel 6 is withstood by cutting ferrule 7 and is sleeved in the Upper shaft sleeve 4.
Referring to Fig. 1, constitute an airtight anti-water cavity by edge connector 1, O-ring seal 3 and Upper shaft sleeve 4, circuit board combination 2 is enclosed in the anti-water cavity.Magnet steel 6 is fixed in rotating shaft 11, have the hole in the middle of the rotating shaft 11, built-in spring 10 and steel ball 9, rotating shaft 11 is withstood by cutting ferrule 7 and is sleeved in the Upper shaft sleeve 4, steel ball 9 heads on Upper shaft sleeve 4, is pressing spring 10, and rotating shaft 11 can freely be stretched between Upper shaft sleeve 4 and cutting ferrule 7 and swing.Shell 5 plays a part to install and fix other parts with automobile gearbox.
Referring to Fig. 2, the peripheral circuit of Hall element includes diode D1, two voltage stabilizing diode D2 and D3, resistance R, two capacitance-resistance R/C1 and R/C2.In the circuit board combination 2 Hall element IC and peripheral circuit are installed.As shown in the figure, the diode D1 of forward connection and resistance R series connection are at the positive pole of Hall element IC input end, the voltage stabilizing diode D2 and the capacitance-resistance R/C1 of reverse connection in parallel are attempted by between the input end of Hall element IC, and the voltage stabilizing diode D3 and the capacitance-resistance R/C2 of forward connection in parallel are attempted by between the output terminal of Hall element IC.
When this sensor is installed, earlier Hall element IC, diode D1, voltage stabilizing diode D2 and D3, resistance R, capacitance-resistance R/C1 and R/C2 are required to be welded on the circuit board according to wiring, form circuit board combination 2, the welding and assembling height of Hall element IC guarantees in the effective range of control of the magnetic line of force of magnet steel 6, circuit board combination 2 and edge connector 1 is welded together again.Put into Upper shaft sleeve 4 in the shell 5, in the groove of Upper shaft sleeve 4, put into O-ring seal 3, above the edge connector 1 that has welded circuit board combination 2 is placed on, shell 5 rivetings are fixed.Circuit board combination 2 just is closed in the annular seal space like this, separates fully with magnet steel 6 with rotating shaft 11, can play good waterproof effect.Magnet steel 6 is annotated in rotating shaft 11 with injection molding way, puts into spring 10 earlier in the hole above the rotating shaft 11, puts into steel ball 9 again, puts into shell 5 and Upper shaft sleeve 4 after combining, and cutting ferrule 7 is contained in card jail on the shell again.Rotating shaft 11 can freely be stretched between Upper shaft sleeve 4 and cutting ferrule 7 and swing like this, avoids causing rotating shaft 11 stuck or wheel box driven tooth damage phenomenon generations.Be lined with the rubber blanket 8 that sealing function is installed below the cutting ferrule 7.
The function of the periphery circuit design of Hall element is such, and diode D1 can resist reverse voltage and impact; Voltage stabilizing diode D2 can make the Control of Voltage of input Hall element IC below certain voltage, and capacitance-resistance R/C1 plays a part to absorb the input end clutter, and Hall element IC can not burnt out; Voltage stabilizing diode D3 is controlled at below certain voltage the voltage pulse output of Hall element IC, and capacitance-resistance R/C2 plays the effect of filtering output terminal clutter, and sensor will be exported a stable square-wave pulse signal like this.
Claims (3)
1. water proof type rotating shaft telescopic oscillating formula electronic speedometer sensor, the rotating shaft and the shell that comprise Hall element, band magnet steel, it is characterized in that: also comprise peripheral circuit and annular seal space, described Hall element and peripheral circuit are contained in circuit board group and close, described annular seal space is made of edge connector, O-ring seal and Upper shaft sleeve, the circuit board combination is welded on the edge connector, Upper shaft sleeve is cased, O-ring seal is contained in the groove of Upper shaft sleeve, and the rotating shaft of described band magnet steel is withstood by cutting ferrule and is sleeved in the Upper shaft sleeve.
2. water proof type rotating shaft telescopic oscillating formula electronic speedometer sensor according to claim 1 is characterized in that: perforate in the middle of the described rotating shaft, spring and steel ball are housed in the hole, and steel ball heads on Upper shaft sleeve, and spring heads on steel ball.
3. water proof type rotating shaft telescopic oscillating formula electronic speedometer sensor according to claim 1 and 2, it is characterized in that: described peripheral circuit includes diode, two voltage stabilizing diodes, resistance and two capacitance-resistances, the diode of forward connection and resistance string are connected in the positive pole of Hall element input end, between the voltage stabilizing diode of reverse connection in parallel and the input end that capacitance-resistance is attempted by Hall element, the voltage stabilizing diode and the capacitance-resistance of the forward connection that another is in parallel are attempted by between the Hall component output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620117570XU CN201066281Y (en) | 2006-06-13 | 2006-06-13 | Waterproof rotary axis and telescopic swing electronic car speed odograph sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620117570XU CN201066281Y (en) | 2006-06-13 | 2006-06-13 | Waterproof rotary axis and telescopic swing electronic car speed odograph sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201066281Y true CN201066281Y (en) | 2008-05-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200620117570XU Expired - Fee Related CN201066281Y (en) | 2006-06-13 | 2006-06-13 | Waterproof rotary axis and telescopic swing electronic car speed odograph sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201066281Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801290A (en) * | 2018-06-05 | 2018-11-13 | 江西中船航海仪器有限公司 | A kind of easy-maintaining waterproof Hall odometer |
-
2006
- 2006-06-13 CN CNU200620117570XU patent/CN201066281Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801290A (en) * | 2018-06-05 | 2018-11-13 | 江西中船航海仪器有限公司 | A kind of easy-maintaining waterproof Hall odometer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080528 Termination date: 20100613 |