CN216694804U - Non-contact position sensor - Google Patents
Non-contact position sensor Download PDFInfo
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- CN216694804U CN216694804U CN202123083264.2U CN202123083264U CN216694804U CN 216694804 U CN216694804 U CN 216694804U CN 202123083264 U CN202123083264 U CN 202123083264U CN 216694804 U CN216694804 U CN 216694804U
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- ceramic plate
- magnetic steel
- connecting rod
- resistance
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Abstract
A non-contact position sensor comprises a resistor disc assembly and a float connecting rod assembly, wherein the resistor disc assembly comprises a ceramic plate, a resistor disc and a metal cover, the metal cover and the ceramic plate enclose a closed space, the resistor disc is arranged in the closed space, the resistor disc comprises a fan-shaped main body and a plurality of contact pins which are connected with the main body and distributed in a fan shape, each contact pin comprises a head part and a connecting part, the head parts are connected with the main body through the connecting parts, the width of the head parts is larger than that of the connecting parts, and the length of the connecting parts is larger than that of the head parts; the floater connecting rod component comprises a floater, a connecting rod, magnetic steel and a swinging seat, the floater drives the swinging seat through the connecting rod, the magnetic steel is installed on the swinging seat and is close to the outer side surface of the ceramic plate, and the magnetic steel can attract the contact pin of the resistance card to enable the resistance card to deform and generate electrical conduction. Because the resistance card is isolated from fuel oil, the resistance card is not influenced by corrosion and abrasion, and the service life is longer.
Description
Technical Field
The utility model relates to a sensor, in particular to a non-contact position sensor for a fuel pump.
Background
The fuel pump sensor mainly comprises a float rod component, a resistor disc and a reed. When the liquid level of the oil liquid changes, the float rod assembly of the fuel pump sensor can rotate, the rotation can drive the contact on the reed to slide on the resistor sheet, and then different resistance values are generated and output to the instrument. In the prior art, the oil level sensor is generally a swing rod type oil level sensor, a resistance sheet is arranged in the oil level sensor, a sliding electrical appliance is used as a basic detection element, a float swing arm drives a movable contact of the sliding electrical appliance to be in a contact type, and the purpose of detecting the oil level is achieved by changing the resistance value of the oil level sensor.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide a non-contact position sensor which is longer in service life and more accurate in measurement.
In order to solve the technical problems, the technical scheme of the utility model is as follows: a non-contact position sensor comprises a resistor disc assembly and a float connecting rod assembly, wherein the resistor disc assembly comprises a ceramic plate, a resistor disc arranged on the inner side surface of the ceramic plate and a metal cover matched with the inner side surface of the ceramic plate, a closed space is formed by the metal cover and the ceramic plate in an enclosing mode, the resistor disc is arranged in the closed space and comprises a fan-shaped main body and a plurality of contact pins which are connected with the main body and distributed in a fan shape, each contact pin comprises a head and a connecting part, the head is connected with the main body through the connecting part, the width of the head is larger than that of the connecting part, and the length of the connecting part is larger than that of the head; the floater connecting rod assembly comprises a floater, a connecting rod, magnetic steel and a swinging seat, the floater drives the swinging seat through the connecting rod, the magnetic steel is installed on the swinging seat and is close to the outer side surface of the ceramic plate, and the magnetic steel can attract the contact pins of the resistance card to deform and generate electric conduction. The principle of the utility model is as follows: after the liquid level in the oil tank changes, the up-and-down floating of the floater drives the connecting rod, the connecting rod drives the swing seat, the swing seat drives the magnetic steel to swing on the outer side surface of the ceramic plate in an arc-shaped track, the magnetic steel attracts the contact pins in the closed space in the moving process, so that the contact pins deform and generate electrical conduction, and the contact pins at different positions have different resistances, so that different electric signal sensing is realized. Because the resistance card is isolated from fuel oil, the resistance card is not influenced by corrosion and abrasion, and the service life is longer.
As an improvement, the resistance chip is a magnetic alloy chip, and the surface of the magnetic alloy chip is provided with a gold-plated layer.
As a modification, the metal cover and the ceramic plate are sealed by solder.
As an improvement, a cylindrical accommodating groove is formed in the swinging seat, the magnetic steel is arranged in the accommodating groove, and the magnetic steel is cylindrical or spherical.
Compared with the prior art, the utility model has the following beneficial effects:
the resistance card is isolated from fuel oil, so that the resistance card is not influenced by corrosion and abrasion, and the service life is longer; the resistance chip is made of magnetic alloy, the gold-plated layer is arranged on the surface of the magnetic alloy, the elastic deformation performance of the resistance chip is good, and the contact conductivity is good; the contact pin comprises a head part and a connecting part, the head part can increase magnetism and contact area, and the connecting part has good elasticity.
Drawings
FIG. 1 is a schematic view of a fuel pump assembly.
Fig. 2 is a schematic diagram of magnetic steel and resistor block assembly.
Fig. 3 is an exploded view of a resistor block assembly.
Fig. 4 is a schematic diagram of a resistor sheet.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
As shown in fig. 1, a non-contact position sensor 2 for use in a fuel pump assembly 1 includes a resistive plate assembly and a float link assembly.
As shown in fig. 3 and 4, the resistive sheet assembly comprises a ceramic plate 21, resistive sheets 25 arranged on the inner side of the ceramic plate 21, and a metal cover 24 matched with the inner side of the ceramic plate 21; the metal cover 24 and the ceramic plate 21 are welded by tin to form a closed space, the resistance card 25 is arranged in the closed space, and the closed space is isolated from the external space; the ceramic plate 21 is provided with a circuit which is electrically conducted with the resistance card 25 and then outputs an electric signal; the resistor disc 25 comprises a fan-shaped main body 251 and a plurality of contact pins 252 connected with the main body 251 and distributed in a fan shape, the main body 251 is fixed on the ceramic plate 21 by glue, the contact pins 252 comprise head portions 2521 and connecting portions 2522, the head portions 2521 are connected with the main body 251 by the connecting portions 2522, the width of the head portions 2521 is greater than the width of the connecting portions 2522, the length of the connecting portions 2522 is greater than the length of the head portions 2521, the contact pins 252 comprise the head portions 2521 and the connecting portions 2522, the head portions 2521 can increase magnetism and contact area, and the connecting portions 2522 have good elasticity; the resistance chip 25 is a magnetic alloy chip, the gold-plated layer is arranged on the surface of the magnetic alloy chip, and the resistance chip 25 is good in elastic deformation performance and contact conductivity.
As shown in fig. 2, the float link assembly comprises a float, a link, a magnetic steel 23 and a swing seat 22; the floater drives the swinging seat 22 through the connecting rod, the magnetic steel 23 is arranged on the swinging seat 22, the magnetic steel 23 is close to the outer side surface of the ceramic plate 21, and the magnetic steel 23 can attract the contact pin 252 of the resistance chip 25 to deform and generate electrical conduction; a cylindrical accommodating groove is formed in the swing seat 22, and the magnetic steel 23 is arranged in the accommodating groove; the magnetic steel 23 is cylindrical or spherical, and the spherical magnetic steel 23 can reduce the contact area with the ceramic plate 21, so that the resistance can be reduced.
The principle of the utility model is as follows: after the liquid level in the oil tank changes, the up-and-down floating of the floater drives the connecting rod, the connecting rod drives the swing seat 22, the swing seat 22 drives the magnetic steel 23 to swing on the outer side surface of the ceramic plate 21 in an arc-shaped track, the magnetic steel 23 attracts the contact pins 252 in the closed space in the moving process to deform and generate electrical conduction, and the contact pins 252 at different positions have different resistances, so that different electrical signal sensing is realized. Because the resistance card 25 is isolated from fuel oil, the resistance card is not influenced by corrosion and abrasion, and the service life is longer.
Claims (4)
1. A non-contact position sensor, includes resistance chip subassembly and float link assembly, its characterized in that: the resistance card assembly comprises a ceramic plate, resistance cards arranged on the inner side surface of the ceramic plate and a metal cover matched with the inner side surface of the ceramic plate, wherein a closed space is formed by the metal cover and the ceramic plate in a surrounding mode, the resistance cards are arranged in the closed space, each resistance card comprises a fan-shaped main body and a plurality of contact pins which are connected with the main body and distributed in a fan-shaped mode, each contact pin comprises a head and a connecting part, the head is connected with the main body through the connecting part, the width of the head is larger than that of the connecting part, and the length of the connecting part is larger than that of the head; the floater connecting rod assembly comprises a floater, a connecting rod, magnetic steel and a swinging seat, the floater drives the swinging seat through the connecting rod, the magnetic steel is installed on the swinging seat and is close to the outer side surface of the ceramic plate, and the magnetic steel can attract the contact pins of the resistance card to deform and generate electric conduction.
2. A non-contact position sensor according to claim 1, wherein: the resistance chip is a magnetic alloy chip, and the surface of the magnetic alloy chip is provided with a gold-plated layer.
3. A non-contact position sensor according to claim 1, wherein: the metal cover and the ceramic plate are sealed through soldering tin.
4. A non-contact position sensor according to claim 1, wherein: the swing seat is provided with a cylindrical accommodating groove, the magnetic steel is arranged in the accommodating groove, and the magnetic steel is cylindrical or spherical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123083264.2U CN216694804U (en) | 2021-12-09 | 2021-12-09 | Non-contact position sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123083264.2U CN216694804U (en) | 2021-12-09 | 2021-12-09 | Non-contact position sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216694804U true CN216694804U (en) | 2022-06-07 |
Family
ID=81837244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123083264.2U Active CN216694804U (en) | 2021-12-09 | 2021-12-09 | Non-contact position sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216694804U (en) |
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2021
- 2021-12-09 CN CN202123083264.2U patent/CN216694804U/en active Active
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