CN105115568A - Novel oil level sensor structure - Google Patents
Novel oil level sensor structure Download PDFInfo
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- CN105115568A CN105115568A CN201510612828.7A CN201510612828A CN105115568A CN 105115568 A CN105115568 A CN 105115568A CN 201510612828 A CN201510612828 A CN 201510612828A CN 105115568 A CN105115568 A CN 105115568A
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- level sensor
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Abstract
The invention discloses a novel oil level sensor structure. The structure comprises a framework provided with a pin shaft, a swing arm hinged to the framework through the pin shaft, a reed formed on the swing arm, a contact fixedly arranged on the reed through precise resistance welding, a ceramic resistance piece arranged on the framework and making contact with the contact, an input wire and an output wire, wherein the input wire and the output wire are connected with the ceramic resistance piece and the metal reed respectively. The lower portion of the reed is at least provided with one contact. The portion, making contact with the ceramic resistance piece, of the contact is made of nickel-gold alloy or porpezite alloy. The structure can effectively improve accuracy of output resistance value signals, and the contact is convenient to replace and maintain.
Description
Technical field:
The present invention relates to sensor technical field, relate to a kind of fuel level sensor structure in particular.
Background technology:
Fuel level sensor is the change causing electric capacity between sensor housing and induction electrode after utilizing oil to enter fuel tank, and is the component that curent change detects oil position or height in container by this change transitions, is the vitals detecting automotive oil tank oil level.Fuel level sensor is connected with automobile power system, oil level gage, measures the oil mass in fuel tank, and oil level situation is shown by oil level gage, checks for people.
Traditional fuel level sensor is by float, float lever, conduction band, the parts compositions such as sliding contact, wherein conduction band is exactly a slide rheostat, the size of its resistance is controlled by the position of float, along with the change of Fuel Oil Remaining in fuel tank, float can fluctuate thereupon, the float lever be connected with described float just can drive sliding contact to slide, the movement of described sliding contact can drive again the change of conduction band resistance, when on-load voltage is fixing, the output current of sensor also just there occurs change, electric current to be reflected on automobile oil level table and to be converted into Fuel Oil Remaining according to certain ratio.The sliding contact of traditional oils level sensor and conduction band rubbing contact, the major defect of sliding contact described in prior art is: serviceable life is short, and mean lifetime is 1 ~ 2 year.Trace it to its cause mainly owing to containing the compositions such as a large amount of sulphur, methyl alcohol, ethanol in current domestic oil product, fuel level sensor is under the long-term impact of these oil products, the surface of sliding contact easily produces layer of metal sulphur silver oxide film, described oxide film can increase the contact resistance between sliding contact and conduction band, thus make the resistance value signal of sensor output error, cause oil level gage to show inaccurate; In addition, sliding contact generally direct welding or be molded on reed, changes very inconvenient, and is unfavorable for maintenance, adds the maintenance cost of automobile simultaneously.
Summary of the invention:
Object of the present invention is exactly the deficiency for prior art, and provides a kind of oil-level sensor structure, and it effectively can improve the degree of accuracy of output resistance value signal, and contact repair and replacement are convenient.
Technology solution of the present invention is as follows: a kind of oil-level sensor structure, comprising: the skeleton being provided with bearing pin; By the swing arm of described hinge on described skeleton; Take shape in the reed in described swing arm; The contact be arranged on described reed is welded and fixed by precision resistance; Be arranged on the ceramic resistor sheet contacted on described skeleton and with described contact; And the input lead be connected with described ceramic resistor sheet and described metal spring leaf respectively and output lead; Wherein, the bottom of described reed is at least provided with a described contact, and the part that described contact contacts with described ceramic resistor sheet selects nickel billon or polarium to make.
Preferred as technique scheme, described bearing pin is positioned at the central authorities on described skeleton top.
Preferred as technique scheme, described reed is taken shape in described swing arm by injection molding manner.
Preferred as technique scheme, described reed selects metal material to make.
Preferred as technique scheme, described output lead is connected with described reed by spring wire, and wherein, one end of described spring wire is connected with described output lead, and the other end is welded on described reed; One end of described input lead is directly welded on described ceramic resistor sheet.
Preferred as technique scheme, the bottom of described skeleton is also provided with substrate, and described substrate is positioned at immediately below described ceramic resistor sheet.
Preferred as technique scheme, the mode adopting face to contact between described contact with described ceramic resistor sheet connects.
Preferred as technique scheme, the end face the selection of material that described contact contacts with described ceramic resistor sheet is noble metal Au Ni5.
Beneficial effect of the present invention is:
1) end face that contact contacts with ceramic resistor sheet selects noble metal Au Ni5 material to make, the corrosion resistance of contact is strong, can meet in the gasoline containing 130PPM sulphur, continuous firing more than 2,000,000 times, the contact end face of contact also can not produce oxide film, thus effectively can ensure the precision of output resistance, makes automobile oil level table accurately show oil level, and effectively extend the serviceable life of contact, reduce maintenance frequency;
2) described contact is welded and fixed by precision resistance and is arranged on reed, and solder joint is little, and solder joint controllability is strong, and face of weld is level and smooth, long service life, and repair and replacement are convenient, save maintenance cost.
Accompanying drawing illustrates:
The following drawings is only intended to schematically illustrate the present invention and explain, not delimit the scope of the invention.Wherein:
Fig. 1 is perspective view of the present invention;
Fig. 2 is the structural representation of main apparent direction of the present invention;
Fig. 3 is the cross-sectional view in A-A direction in Fig. 2;
Fig. 4 is the position relationship schematic diagram between contact of the present invention and ceramic resistor sheet.
In figure, 10, skeleton; 11, bearing pin; 20, swing arm; 30, reed; 40, ceramic resistor sheet; 50, contact; 60, spring wire; 70, substrate.
Embodiment:
Embodiment: by particular specific embodiment, embodiments of the present invention are described below, those skilled in the art can understand other advantages of the present invention and effect easily by content disclosed in the present specification." top ", " below " mentioned in the present embodiment is consistent with the direction of accompanying drawing top itself, below, only understand for ease of describing, and be not used to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under changing technology contents without essence, also when being considered as the enforceable category of the present invention.
See shown in Fig. 1 to Fig. 3, a kind of oil-level sensor structure, comprising: the skeleton 10 being provided with bearing pin 11; The swing arm 20 on described skeleton 10 is articulated with by described bearing pin 11; Take shape in the reed 30 in described swing arm 20; The contact 50 be arranged on described reed 30 is welded and fixed by precision resistance; Be arranged on the ceramic resistor sheet 40 contacted on described skeleton 10 and with described contact 50; And the input lead be connected with described ceramic resistor sheet 40 and described metal spring leaf 30 respectively and output lead; Wherein, the bottom of described reed 30 is at least provided with a described contact 50, the part that described contact 50 contacts with described ceramic resistor sheet 40 selects nickel billon or polarium to make, in the present embodiment, as shown in Figure 4, the bottom of described reed 30 is provided with three described contacts 50, and the quantity of described contact 50 is determined according to actual service condition.The bottom of described skeleton 10 is also provided with substrate 70, and described substrate 70 is positioned at immediately below described ceramic resistor sheet 40.Described ceramic resistor sheet 40 is provided with conduction band, and described conduction band is banded ringwise, and described contact 50 is pressed on described conduction band, and moves on described conduction band along with the change of oil mass in automotive oil tank.
In the present embodiment, described bearing pin 11 is positioned at the central authorities on described skeleton 10 top, described reed 30 selects metal material to make, and takes shape in described swing arm 20 by injection molding manner, as shown in Figure 4, the mode adopting face to contact between described contact 50 with described ceramic resistor sheet 40 connects, one end of described contact 50 is fixed on described reed 30 by the mode that precision resistance welds, the other end contacts with the conduction band on described ceramic resistor sheet 40, along with the change of oil mass in fuel tank, described swing arm 20 can swing thereupon, the described reed 30 be connected with described swing arm 20 just can drive described contact 50 to swing on described ceramic resistor sheet 40, and the swing of described contact 50 can cause the change of described ceramic resistor sheet 40 resistance, when on-load voltage is fixing, the output current of sensor also just there occurs change, the connected mode of 50, described contact contact effectively increases the contact area between described contact 50 and described ceramic resistor sheet 40, ensure that the degree of accuracy of output resistance value signal to a certain extent, described output lead is connected with described reed 30 by spring wire 60, and wherein, one end of described spring wire 60 is connected with described output lead, and the other end is welded on described reed 30, and solder joint is a point, one end of described input lead is directly welded on described ceramic resistor sheet 40, and solder joint is b point, concrete, and one end of described input lead is welded on the conduction band of described ceramic resistor sheet 40.
The end face the selection of material that described contact 50 contacts with described ceramic resistor sheet 40 is noble metal Au Ni5, the object of such setting reduces the use amount of noble metal Au Ni5, to ensure that while reducing costs surface, described contact 50 can not produce oxide film, guarantee to export high-precision resistance value; In addition, described contact 50 also can entirety all adopt noble metal Au Ni5 to make.
The corrosion resistance of contact 50 described in the present invention is strong, can meet in the gasoline containing 130PPM sulphur, continuous firing more than 2,000,000 times, the contact end face of described contact 50 also can not produce oxide film, thus effectively can ensure the precision of output resistance, make automobile oil level table accurately show oil level, and effectively extend the serviceable life of contact, reduce maintenance frequency; Described contact 50 is welded and fixed by precision resistance and is arranged on described reed 30, and solder joint is little, and solder joint controllability is strong, and face of weld is level and smooth, long service life, and repair and replacement are convenient, save maintenance cost.
Described embodiment in order to illustrative the present invention, but not for limiting the present invention.Any those skilled in the art all without prejudice under spirit of the present invention and category, can modify to described embodiment, therefore the scope of the present invention, should listed by claim of the present invention.
Claims (8)
1. an oil-level sensor structure, is characterized in that, comprising:
Be provided with the skeleton (10) of bearing pin (11);
The swing arm (20) on described skeleton (10) is articulated with by described bearing pin (11);
Take shape in the reed (30) in described swing arm (20);
The contact (50) be arranged on described reed (30) is welded and fixed by precision resistance;
Be arranged on described skeleton (10) to go up and the ceramic resistor sheet (40) contacted with described contact (50); And
The input lead be connected with described ceramic resistor sheet (40) and described metal spring leaf (30) respectively and output lead;
Wherein, the bottom of described reed (30) is at least provided with a described contact (50), and the part that described contact (50) contact with described ceramic resistor sheet (40) selects nickel billon or polarium to make.
2. oil-level sensor structure according to claim 1, is characterized in that: described bearing pin (11) is positioned at the central authorities on described skeleton (10) top.
3. oil-level sensor structure according to claim 1, is characterized in that: described reed (30) is taken shape in described swing arm (20) by injection molding manner.
4. oil-level sensor structure according to claim 1, is characterized in that: described reed (30) selects metal material to make.
5. oil-level sensor structure according to claim 1, it is characterized in that: described output lead is connected with described reed (30) by spring wire (60), wherein, one end of described spring wire (60) is connected with described output lead, and the other end is welded on described reed (30); One end of described input lead is directly welded on described ceramic resistor sheet (40).
6. oil-level sensor structure according to claim 1, it is characterized in that: the bottom of described skeleton (10) is also provided with substrate (70), described substrate (70) is positioned at immediately below described ceramic resistor sheet (40).
7. oil-level sensor structure according to claim 1, is characterized in that: the mode adopting face to contact between described contact (50) with described ceramic resistor sheet (40) connects.
8. oil-level sensor structure according to claim 7, is characterized in that: the end face the selection of material that described contact (50) contact with described ceramic resistor sheet (40) is noble metal Au Ni5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510612828.7A CN105115568A (en) | 2015-09-23 | 2015-09-23 | Novel oil level sensor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510612828.7A CN105115568A (en) | 2015-09-23 | 2015-09-23 | Novel oil level sensor structure |
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| Publication Number | Publication Date |
|---|---|
| CN105115568A true CN105115568A (en) | 2015-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510612828.7A Pending CN105115568A (en) | 2015-09-23 | 2015-09-23 | Novel oil level sensor structure |
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| CN (1) | CN105115568A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895893A (en) * | 2017-02-23 | 2017-06-27 | 合肥协力仪表控制技术股份有限公司 | A kind of novel fuel sensor |
| CN107990960A (en) * | 2017-06-08 | 2018-05-04 | 上海盈智汽车零部件有限公司 | A kind of oil-level sensor |
| CN109443495A (en) * | 2019-01-16 | 2019-03-08 | 浙江湖州新京昌电子有限公司 | A kind of reluctance type sealing non-contact liquid level sensor |
| CN111103086A (en) * | 2019-12-16 | 2020-05-05 | 武汉驰电科技有限公司 | Ceramic resistance card and pressure sensor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6269695B1 (en) * | 1998-03-05 | 2001-08-07 | Nartron Corporation | Analog liquid level sensor |
| CN202631060U (en) * | 2011-12-30 | 2012-12-26 | 大陆汽车电子(芜湖)有限公司 | Liquid level sensor and wafer thereof |
| CN203396451U (en) * | 2013-08-23 | 2014-01-15 | 胡莲慧 | Automobile oil level monitoring device |
| CN104880236A (en) * | 2015-06-23 | 2015-09-02 | 浙江湖州新京昌电子有限公司 | Novel oil level sensor structure |
-
2015
- 2015-09-23 CN CN201510612828.7A patent/CN105115568A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6269695B1 (en) * | 1998-03-05 | 2001-08-07 | Nartron Corporation | Analog liquid level sensor |
| CN202631060U (en) * | 2011-12-30 | 2012-12-26 | 大陆汽车电子(芜湖)有限公司 | Liquid level sensor and wafer thereof |
| CN203396451U (en) * | 2013-08-23 | 2014-01-15 | 胡莲慧 | Automobile oil level monitoring device |
| CN104880236A (en) * | 2015-06-23 | 2015-09-02 | 浙江湖州新京昌电子有限公司 | Novel oil level sensor structure |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895893A (en) * | 2017-02-23 | 2017-06-27 | 合肥协力仪表控制技术股份有限公司 | A kind of novel fuel sensor |
| CN107990960A (en) * | 2017-06-08 | 2018-05-04 | 上海盈智汽车零部件有限公司 | A kind of oil-level sensor |
| CN107990960B (en) * | 2017-06-08 | 2024-02-23 | 上海盈智汽车零部件有限公司 | Novel oil level sensor |
| CN109443495A (en) * | 2019-01-16 | 2019-03-08 | 浙江湖州新京昌电子有限公司 | A kind of reluctance type sealing non-contact liquid level sensor |
| CN111103086A (en) * | 2019-12-16 | 2020-05-05 | 武汉驰电科技有限公司 | Ceramic resistance card and pressure sensor |
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Application publication date: 20151202 |