CN114383496A - Small-size large-stroke angular displacement sensor - Google Patents
Small-size large-stroke angular displacement sensor Download PDFInfo
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- CN114383496A CN114383496A CN202210286668.1A CN202210286668A CN114383496A CN 114383496 A CN114383496 A CN 114383496A CN 202210286668 A CN202210286668 A CN 202210286668A CN 114383496 A CN114383496 A CN 114383496A
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- bearing
- annular
- small
- displacement sensor
- angular displacement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
Abstract
The application discloses small-size big stroke angle displacement sensor relates to electron device technical field. The small-size large-stroke angular displacement sensor comprises a shell, a rotating shaft, a bearing, an electric brush assembly and a resistance card assembly; the resistance card assembly comprises an annular resistance band and an annular conductive band, the annular resistance band and the conductive band are coaxially nested, and an included angle formed by two ends of the annular resistance band and the circle center is larger than or equal to 280 degrees. The sensor has small size and large stroke.
Description
Technical Field
The application relates to the technical field of electronic devices, in particular to a small-size large-stroke angular displacement sensor.
Background
The angular displacement sensor is a sensitive element which can convert the change of mechanical angular displacement into resistance and voltage output in a certain functional relation with the change of mechanical angular displacement. The wear-resistant gear has the advantages of good wear resistance, long rotation life of thousands of times, good smoothness, reliable contact, high precision and the like, and is widely applied to the fields of aviation, aerospace, weaponry and the like.
At present, the development trend of electronic complete machine systems is developing towards miniaturization, high precision, high reliability and the like, so that a miniature, high precision and high reliability angular displacement sensor is favored; however, in the prior art, the stroke, the size and the accuracy of the angular displacement sensor are difficult to be considered at the same time, and the angular displacement sensor with a large stroke is often large in size and small in measurement accuracy, so that the requirements of an electronic complete machine system are difficult to meet.
Disclosure of Invention
The embodiment of the application provides a small-size large-stroke angular displacement sensor with a stroke of 280 degrees.
The embodiment of the application provides a small-size large-stroke angular displacement sensor, which comprises a shell, a rotating shaft, a bearing, an electric brush assembly and a resistance card assembly, wherein the rotating shaft is arranged on the shell;
the resistance card assembly comprises an annular resistance band and an annular conductive band, the annular resistance band and the annular conductive band are coaxially nested, and an included angle formed by two ends of the annular resistance band and the circle center is larger than or equal to 280 degrees.
Optionally, in some embodiments of the present application, the distance between the annular resistance band and the annular conductive band is 0.3mm to 0.8 mm.
Optionally, in some embodiments of the present application, the annular width of the annular resistance band is 1.5mm to 2.5 mm.
Optionally, in some embodiments of the present application, the brush assembly includes a brush holder and a brush mounted on a surface of the brush holder; the electric brush is simultaneously contacted with the annular resistance strip and the annular conductive strip.
Optionally, in some embodiments of the present application, a surface of the brush contacting the annular resistance band and the annular conductive band is an arc surface protruding toward the annular resistance band and the annular conductive band.
Optionally, in some embodiments of the present application, the housing includes a base and an upper cover mounted on the base;
the base is provided with a mounting hole penetrating through the base, and the outer surface of the bearing is fixedly connected with the wall of the mounting hole;
be provided with one in the upper cover and hold the chamber, the brush subassembly with the resistance card unit mount be in hold the intracavity, the pivot passes the mounting hole stretches into hold the intracavity with resistance card subassembly or brush subassembly fixed connection.
Optionally, in some embodiments of the present application, the bearing includes a first bearing and a second bearing, and both the first bearing and the second bearing are fixedly connected to the wall of the mounting hole.
Optionally, in some embodiments of the present application, the outer surface of the rotating shaft is glued to the inner surfaces of the first bearing and the second bearing.
Optionally, in some embodiments of the present application, a collar coaxial with the rotating shaft is disposed in a middle portion of the rotating shaft, and a gasket is further disposed between the collar and one end surface of the bearing; the gasket is coaxially arranged with the rotating shaft;
the electric brush assembly, the resistor assembly and the bearing are respectively arranged on two sides of the clamping ring.
Optionally, in some embodiments of the present application, the upper cover is sealingly connected to the base.
The application provides a small-size large-stroke angular displacement sensor, which adopts annular resistance belts and annular conductive belts which are arranged in concentric circles, increases the angle of the annular resistance belts and enables the effective electrical stroke of the sensor to be higher; meanwhile, the size of the sensor can be reduced to phi 11mm x 10 mm; in addition, the annular resistance band and the annular conductive band are concentrically nested, so that the distance between the resistance band and the conductive band can be reduced, the width of the resistance band is increased, and the linear precision requirement of the sensor is guaranteed.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a small-size large-stroke angular displacement sensor provided in some embodiments of the present application;
FIG. 2 is a schematic diagram of a resistor block assembly according to some embodiments of the present application;
wherein, the dotted lines in fig. 1 and fig. 2 are both central lines.
The device comprises a rotating shaft 1, a first adhesive 2, a bearing 3, a base 4, a leading-out wire 5, a heat-shrinkable tube 6, a sealing adhesive 7, a resistor sheet assembly 8, a substrate 81, a copper-clad strip 82, an annular conductive strip 83, an annular resistor strip 84, an electric brush 9, an upper cover 10, an insulating sleeve 11, an electric brush holder 12, a second adhesive 13, a clamping ring 14 and a gasket 15.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a small-size large-stroke angular displacement sensor, which refers to fig. 1 and 2 and comprises a shell, a rotating shaft 1, a bearing 3, a brush assembly and a resistor disc assembly 8; the resistance card assembly 8 comprises an annular resistance band 84 and an annular conductive band 83, the annular resistance band 84 and the annular conductive band are coaxially nested, and an included angle formed between the two ends of the annular resistance band 84 and the circle center is larger than or equal to 280 degrees.
In some embodiments, the outer surface of the bearing 3 is fixedly connected with the inner surface of the shell, and the outer surface of the rotating shaft 1 is fixedly connected with the inner surface of the bearing 3; the electric brush component is fixed on the outer ring of the bearing 3 or the shell; the resistor block assembly 8 is fixed on the rotating shaft 1 or the inner ring of the bearing 3, the electric brush assembly and the resistor block assembly 8 are arranged oppositely, and when the rotating shaft 1 rotates, the resistor block assembly 8 rotates along with the rotation of the rotating shaft 1.
In some embodiments, the outer surface of the bearing 3 is fixedly connected with the inner surface of the shell, and the outer surface of the rotating shaft 1 is fixedly connected with the inner surface of the bearing 3; the resistor sheet assembly 8 is fixed on the outer ring of the bearing 3 or the shell; the brush component is fixed on the rotating shaft 1 or the inner ring of the bearing 3, the brush component is arranged opposite to the resistance card component 8, and when the rotating shaft 1 rotates, the brush component rotates along with the rotation of the rotating shaft 1.
The resistor sheet assembly 8 is connected with an outgoing line 5, and the outgoing line 5 penetrates through the shell to be externally connected with a circuit.
In some embodiments, the lead wires 5 are sleeved with a heat shrinkable tube 6, so as to improve corrosion resistance, water resistance and sealing effect of the joint of the lead wires 5 and the shell. Preferably, sealing compound 7 is further arranged at the joints of the outgoing line 5 and the heat shrinkable tube 6 and the shell, so that the sealing effect of the shell is further improved, the working environment of devices in the shell is ensured, and the service life is prolonged.
In some embodiments, the housing includes a base 4 and an upper cover 10 mounted on the base 4; the base 4 is provided with a mounting hole penetrating through the base 4, and the outer surface of the bearing 3 is fixedly connected with the wall of the mounting hole; the upper cover 10 is internally provided with a containing cavity, the electric brush assembly and the resistor sheet assembly 8 are installed in the containing cavity, and the rotating shaft 1 penetrates through the mounting hole to extend into the containing cavity to be fixedly connected with the resistor sheet assembly 8 or the electric brush assembly.
In some embodiments, the joint of the upper cover 10 and the base 4 is connected by the second adhesive 13, so that the joint of the upper cover 10 and the base 4 is fixed and sealed, the brush assembly and the resistor disc assembly 8 are prevented from being exposed to air, the service life is shortened, and the measurement error is increased.
In some embodiments, the brush assembly includes a brush holder 12 and a brush 9 mounted on a surface of the brush holder 12; the electric brush 9 is in contact with the annular resistance band 84 and the annular conductive band 83 at the same time, namely, a single-brush structure is adopted, so that the structure of the sensor is smaller, and the sensor is convenient to mount and carry; and simultaneously, the brush 9 moves on the annular resistance strip 84 and the annular conductive strip 83, so that the pressure uniformity of the brush 9 is ensured.
In some embodiments, one surface of the brush 9 contacting the annular resistance band 84 and the annular conductive band 83 is an arc surface protruding towards the annular resistance band 84 and the annular conductive band 83, so that the force-bearing area of the brush is large, no sudden change of stress occurs, and the scratch and rub feeling of the brush 9 during rotation is reduced.
In some embodiments, the rotating shaft 1 is sleeved with an insulating sleeve 11, and the brush holder 12 is fixed on the insulating sleeve 11; the resistor component 8 is also sleeved on the rotating shaft 1, and the insulating sleeve 11 extends downwards to a position between the resistor component 8 and the outer surface of the rotating shaft 1; the resistor block assembly 8 is fixed to the housing.
In some embodiments, the resistor disc assembly 8 further comprises a substrate 81 and a copper clad tape 82. The annular resistive strip and the annular conductive strip 83 are disposed on the substrate 81. The annular resistance belt is positioned on the outer side, and a notch is formed in the annular resistance belt; the annular conductive band 83 is arranged on the inner side and is provided with a connecting strip extending to the gap; the two ends of the annular resistance belt and the connecting strip are both provided with copper-clad belts 82, and the outgoing line 5 is connected with the copper-clad belts 82 to realize signal output.
In some embodiments, the substrate 81 is an epoxy glass brazing plate, which can reduce the thickness of the resistor disc assembly 8, and meanwhile, the epoxy glass brazing plate has the advantages of stable insulating property, 170 ℃ high temperature resistance, chemical corrosion resistance and the like.
In some embodiments, the annular resistance belt is prepared by screen printing, and the resistance sheet manufactured by the process has small deviation of effective electric stroke and high initial linear precision.
In some embodiments, the annular resistive band 84 is spaced from the annular conductive band 83 by 0.3mm to 0.8mm, preferably 0.5 mm.
In some embodiments, the annular width of the annular resistive band 84 is 1.5mm to 2.5mm, preferably 2mm, so that the annular resistive band has a wider trimming width, which ensures high linear accuracy requirement of the sensor.
In some embodiments, the bearing 3 includes a first bearing and a second bearing, and the first bearing and the second bearing are both fixedly connected with the wall of the mounting hole. The brush subassembly with resistance card subassembly 8 sets up in the same one side of first bearing and second bearing, realizes unilateral duplex bearing 3 structure, and the torque is good, makes the sensor have good rotation performance.
In some embodiments, the outer surface of the rotating shaft 1 and the inner surfaces of the first bearing and the second bearing are bonded through a first adhesive 2, so that the first bearing and the second bearing are combined with the rotating shaft 1; preferably, a collar 14 coaxial with the rotating shaft 1 is arranged in the middle of the rotating shaft 1, and a gasket 15 is further arranged between the collar 14 and one end face of the bearing 3; the gasket 15 is arranged coaxially with the rotating shaft 1; the brush assembly and the resistor assembly 8 and the bearing 3 are respectively arranged on two sides of the clamping ring 14. Through the cooperation of packing ring 15 and first adhesive 2, the axial displacement of effective control axle guarantees the axle head clearance that is little enough, improves the sensor reliability.
The small-size large-stroke angular displacement sensor provided by the embodiment of the present application is described in detail above, and the principle and the implementation of the present application are explained in the present application by applying specific examples, and the description of the above embodiment is only used to help understand the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A small-size large-stroke angular displacement sensor is characterized in that: the device comprises a shell, a rotating shaft, a bearing, an electric brush assembly and a resistance card assembly;
the resistance card assembly comprises an annular resistance band and an annular conductive band, the annular resistance band and the annular conductive band are coaxially nested, and an included angle formed by two ends of the annular resistance band and the circle center is larger than or equal to 280 degrees.
2. A small-size large-stroke angular displacement sensor according to claim 1, wherein: the distance between the annular resistance band and the annular conductive band is 0.3 mm-0.8 mm.
3. A small-size large-stroke angular displacement sensor according to claim 1, wherein: the ring width of the annular resistance band is 1.5 mm-2.5 mm.
4. A small-size large-stroke angular displacement sensor according to claim 1, wherein: the electric brush assembly comprises an electric brush seat and an electric brush arranged on the surface of the electric brush seat; the electric brush is simultaneously contacted with the annular resistance strip and the annular conductive strip.
5. The small-size large-stroke angular displacement sensor according to claim 4, wherein: one side of the electric brush, which is in contact with the annular resistance band and the annular conductive band, is an arc-shaped surface protruding towards the annular resistance band and the annular conductive band.
6. A small-size large-stroke angular displacement sensor according to claim 1, wherein: the shell comprises a base and an upper cover arranged on the base; the base is provided with a mounting hole penetrating through the base, and the outer surface of the bearing is fixedly connected with the wall of the mounting hole; be provided with one in the upper cover and hold the chamber, the brush subassembly with the resistance card unit mount be in hold the intracavity, the pivot passes the mounting hole stretches into hold the intracavity with resistance card subassembly or brush subassembly fixed connection.
7. The small-size large-stroke angular displacement sensor according to claim 6, wherein: the bearing comprises a first bearing and a second bearing, and the first bearing and the second bearing are fixedly connected with the wall of the mounting hole.
8. A small-size large-stroke angular displacement sensor according to claim 7, wherein: the outer surface of the rotating shaft is glued with the inner surfaces of the first bearing and the second bearing.
9. A small-size large-stroke angular displacement sensor according to claim 7, wherein: a clamping ring coaxial with the rotating shaft is arranged in the middle of the rotating shaft, and a gasket is arranged between the clamping ring and one end face of the bearing; the gasket is coaxially arranged with the rotating shaft; the electric brush assembly, the resistor assembly and the bearing are respectively arranged on two sides of the clamping ring.
10. The small-size large-stroke angular displacement sensor according to claim 6, wherein: the upper cover is connected with the base in a sealing mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210286668.1A CN114383496A (en) | 2022-03-23 | 2022-03-23 | Small-size large-stroke angular displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210286668.1A CN114383496A (en) | 2022-03-23 | 2022-03-23 | Small-size large-stroke angular displacement sensor |
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| Publication Number | Publication Date |
|---|---|
| CN114383496A true CN114383496A (en) | 2022-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210286668.1A Pending CN114383496A (en) | 2022-03-23 | 2022-03-23 | Small-size large-stroke angular displacement sensor |
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|---|---|
| CN (1) | CN114383496A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03179705A (en) * | 1989-12-07 | 1991-08-05 | Matsushita Electric Ind Co Ltd | Potentiometer with switch circuit |
| CN1945765A (en) * | 2005-10-06 | 2007-04-11 | 松下电器产业株式会社 | Variable resistor and method of manufacturing the same |
| CN201178010Y (en) * | 2007-03-21 | 2009-01-07 | 成都市耐斯特精密模具有限公司 | Metal glaze potentiometer |
| CN202709989U (en) * | 2011-06-20 | 2013-01-30 | 阿尔卑斯电气株式会社 | Rotary sensor |
| CN204214397U (en) * | 2014-11-28 | 2015-03-18 | 江西天河传感器科技有限公司 | Angular displacement sensor |
| CN206291847U (en) * | 2016-12-19 | 2017-06-30 | 四川永星电子有限公司 | A kind of microminiature angular displacement sensor |
| CN206291849U (en) * | 2016-12-22 | 2017-06-30 | 四川永星电子有限公司 | A kind of Precise Angular Displacement Sensor |
| CN212903043U (en) * | 2020-09-08 | 2021-04-06 | 成都宏明电子股份有限公司 | Angular displacement potentiometer or sensor convenient to install quickly |
| CN215447750U (en) * | 2021-08-19 | 2022-01-07 | 宁波市北仑机械电器有限公司 | High-measurement-precision plastic-guide angular displacement sensor |
| CN215491521U (en) * | 2021-09-08 | 2022-01-11 | 江西天河传感器科技有限公司 | Long-life high-precision angle sensor |
| CN114034241A (en) * | 2022-01-11 | 2022-02-11 | 四川永星电子有限公司 | Precise coaxial quadruple angular displacement sensor |
-
2022
- 2022-03-23 CN CN202210286668.1A patent/CN114383496A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03179705A (en) * | 1989-12-07 | 1991-08-05 | Matsushita Electric Ind Co Ltd | Potentiometer with switch circuit |
| CN1945765A (en) * | 2005-10-06 | 2007-04-11 | 松下电器产业株式会社 | Variable resistor and method of manufacturing the same |
| CN201178010Y (en) * | 2007-03-21 | 2009-01-07 | 成都市耐斯特精密模具有限公司 | Metal glaze potentiometer |
| CN202709989U (en) * | 2011-06-20 | 2013-01-30 | 阿尔卑斯电气株式会社 | Rotary sensor |
| CN204214397U (en) * | 2014-11-28 | 2015-03-18 | 江西天河传感器科技有限公司 | Angular displacement sensor |
| CN206291847U (en) * | 2016-12-19 | 2017-06-30 | 四川永星电子有限公司 | A kind of microminiature angular displacement sensor |
| CN206291849U (en) * | 2016-12-22 | 2017-06-30 | 四川永星电子有限公司 | A kind of Precise Angular Displacement Sensor |
| CN212903043U (en) * | 2020-09-08 | 2021-04-06 | 成都宏明电子股份有限公司 | Angular displacement potentiometer or sensor convenient to install quickly |
| CN215447750U (en) * | 2021-08-19 | 2022-01-07 | 宁波市北仑机械电器有限公司 | High-measurement-precision plastic-guide angular displacement sensor |
| CN215491521U (en) * | 2021-09-08 | 2022-01-11 | 江西天河传感器科技有限公司 | Long-life high-precision angle sensor |
| CN114034241A (en) * | 2022-01-11 | 2022-02-11 | 四川永星电子有限公司 | Precise coaxial quadruple angular displacement sensor |
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Application publication date: 20220422 |