CN117146872A - Eccentric disc shaft angle encoder - Google Patents
Eccentric disc shaft angle encoder Download PDFInfo
- Publication number
- CN117146872A CN117146872A CN202311270404.8A CN202311270404A CN117146872A CN 117146872 A CN117146872 A CN 117146872A CN 202311270404 A CN202311270404 A CN 202311270404A CN 117146872 A CN117146872 A CN 117146872A
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- encoder
- lamp holder
- eccentric disc
- luminous tube
- receiving
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- 238000009434 installation Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 abstract description 6
- 238000012937 correction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- FXNSVEQMUYPYJS-UHFFFAOYSA-N 4-(2-aminoethyl)benzenesulfonamide Chemical compound NCCC1=CC=C(S(N)(=O)=O)C=C1 FXNSVEQMUYPYJS-UHFFFAOYSA-N 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
- G01D5/3473—Circular or rotary encoders
- G01D5/34738—Axles; Driving or coupling means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
Abstract
The application discloses an eccentric disc shaft angle encoder, which comprises an encoder rear cover, wherein a bottom shell bearing is arranged in the encoder rear cover; the encoder core part sequentially comprises a luminous tube control board, a luminous tube lamp holder, an eccentric disc, a receiving tube lamp holder and a receiving tube control board, wherein a luminous tube is arranged on the luminous tube control board, the luminous tube is coaxially assembled with a light through hole arranged on the luminous tube lamp holder, and the receiving part is also arranged; the luminous tube lamp holder is overlapped with the axial end face of the receiving tube lamp holder and is coaxially assembled with the eccentric disc, and the luminous tube lamp holder and the receiving tube lamp holder ensure the coaxiality of the light gap; the encoder mounting panel is coaxially mounted with an eccentric disc spindle which passes through the encoder core and is coaxially connected with the bottom shell bearing. The application reduces and cures the processing and assembling errors of the eccentric disc shaft encoder by coaxially installing the encoder rear cover, the luminous tube control board, the luminous tube lamp holder, the eccentric disc, the receiving tube lamp holder, the receiving tube control board and the encoder mounting panel and coaxially installing the luminous tube, the receiving tube and the light through hole.
Description
Technical Field
The application relates to the technical field of photoelectric shaft angle encoders, in particular to an eccentric disc shaft angle encoder.
Background
With the technical development of the automobile industry, the datamation and the intellectualization of the vehicle are rapidly promoted, and the shaft encoder which is widely applied to the functions of the AEBS and the ESC of the vehicle is popularized. The photoelectric shaft angle encoder is generally divided into two technical categories of a grating and an eccentric disc, the grating shaft angle encoder needs to plan Gray code tracks on the grating disc from inside to outside according to subdivision precision, each bar code track consists of a light-transmitting sector and a light-non-transmitting sector, a group of reading heads are formed by correspondingly arranging a luminous tube, a receiving tube and a signal processing circuit, the higher the precision is, the more the number of the reading heads needs to be arranged, the larger the volume is, and the application in the aspects of AEBS, ESC and the like of a vehicle is limited by space and is difficult to popularize. The conventional eccentric disc shaft angle encoder is characterized in that 4 groups of reading heads are uniformly distributed on the circumference, the optical channels of the reading heads are shielded through rotation of the eccentric disc to form current signals, 4 paths of sine wave signals with 90-degree phase difference can be respectively generated, and then the sine signals are processed to extract the rotation angle of the eccentric disc. Compared with the grating encoder, the eccentric disc shaft angle encoder has the advantages of small volume, low cost, small processing difficulty and the like. In comparison, the sinusoidal signal information content of the eccentric disc shaft angle encoder is large, but the processing and assembling errors have great influence on the precision, and the correction coefficient is usually adopted to compensate the errors in the prior art, so that the method reduces the errors and simultaneously leads the originally accurate part of data to generate errors.
Disclosure of Invention
The application aims to provide an eccentric disc shaft angle encoder, which is used for solving the problems that the machining and assembling errors of the eccentric disc shaft angle encoder in the prior art have great influence on precision and the error cannot be compensated by a correction coefficient method.
The application solves the problems by the following technical proposal:
an eccentric disc shaft encoder comprising an encoder back cover, an encoder core, and an encoder mounting panel, wherein:
the encoder comprises an encoder rear cover, a bottom shell bearing sleeve ring is arranged in the encoder rear cover, a bottom shell bearing is arranged in the bottom shell bearing sleeve ring, the outer shaft surface of the bottom shell bearing is in tight fit with the bottom shell bearing sleeve ring, the inner shaft surface of the bottom shell bearing is in tight fit with a main shaft of a core part of the encoder, and the encoder rear cover is provided with a first threaded hole;
the encoder core part sequentially comprises a luminous tube control board, a luminous tube lamp holder, an eccentric disc, a receiving tube lamp holder and a receiving tube control board, wherein a luminous tube is arranged on the luminous tube control board, the luminous tube is coaxially assembled with a luminous tube lamp holder light-through hole arranged on the luminous tube lamp holder, and the inner diameter of the luminous tube lamp holder light-through hole is matched with the outer diameter of the luminous tube; the receiving tube control board is provided with a receiving tube, the receiving tube is coaxially assembled with a receiving tube lamp holder light-passing hole arranged on the receiving tube lamp holder, and the inner diameter of the receiving tube lamp holder light-passing hole is matched with the outer diameter of the receiving tube; the luminous tube lamp holder is overlapped with the axial end face of the receiving tube lamp holder, is coaxially assembled with the eccentric disc and is respectively positioned at two sides of the eccentric disc;
the encoder installation panel is internally provided with a panel bearing lantern ring, the panel bearing lantern ring is coaxially provided with a panel bearing, the panel bearing is coaxially installed with a bearing main shaft of an eccentric disc, the bearing main shaft of the eccentric disc penetrates through the encoder core part and is coaxially connected with a bottom shell bearing, and the encoder installation panel is provided with a second threaded hole corresponding to the first threaded hole.
Further, the luminotron is 8 infrared light emitting diodes distributed along the circumference of the luminotron control board, the receiving tube is 8 infrared receiving diodes distributed along the circumference of the receiving tube control board, and a reading head formed by the 8 luminotron and the 8 receiving tubes has the function of correcting the phase and amplitude deviation of each other and is an innovative core component of the encoder.
Further, the diameter of the eccentric disc is the same as the diameter of the circle centers of the 8 light-passing holes of the luminous tube lamp holder and the receiving light lamp holder, the eccentric distance of the eccentric disc is slightly smaller than the radius of the light-passing holes of the luminous tube lamp holder and the receiving light lamp holder, and when the eccentric disc rotates, the area of the corresponding light-passing hole shielded by the eccentric disc changes.
Further, a positioning strip is arranged on the outer side of the bottom shell bearing collar, and a positioning groove tightly matched with the positioning strip is arranged on the outer side of the encoder core part.
Further, a positioning strip is arranged on the outer side of the bottom shell bearing collar, and a positioning groove tightly matched with the positioning strip is arranged on the outer side of the encoder core part.
Compared with the prior art, the application has the following advantages:
(1) According to the application, the encoder rear cover, the luminous tube control plate, the luminous tube lamp holder, the eccentric disc, the receiving tube lamp holder, the receiving tube control plate and the encoder mounting panel are coaxially and closely mounted, and the luminous tube, the receiving tube and the light passing hole are coaxially and closely mounted, so that the machining and assembling errors of the eccentric disc shaft angle encoder are reduced and cured.
(2) In the application, the diameter of the eccentric disc is consistent with the diameter of the circle center of the uniformly distributed light-passing holes, and the eccentricity is set to be slightly smaller than the diameter of the circle center of the light-passing holes according to actual conditions in order to avoid peak-valley signal loss caused by processing and assembly errors. When the eccentric disc rotates, the area of the corresponding light through hole shielded by the eccentric disc changes, under the condition that the light power of the 8 groups of reading hair light tubes is constant, the current flowing on the receiving tube of the reading head changes along with the light power, the eccentric disc rotates for one circle, sinusoidal current signals with the phase difference of 45 degrees are generated in the receiving tube of the 8 groups of reading heads along with the light power, and the signals can be correction parameters of the phase and the amplitude of adjacent signals and are core parameters of the application.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present application;
FIG. 2 is a schematic diagram of the assembly of the encoder core and the encoder back cover;
FIG. 3 is a schematic view of an encoder mounting panel and bottom housing assembly;
FIG. 4 is an assembled schematic view of the encoder core;
FIG. 5 is an exploded view of the present application;
FIG. 6 is a schematic diagram of the cooperation of the eccentric disc and the luminous tube lamp holder;
wherein, 1-the encoder back cover; 2-encoder core; 3-encoder mounting panel; 11-bottom shell bearing collar; 12-positioning strips; 13-bottom shell bearings; 14-a threaded hole of a rear cover of the encoder; 21-luminous tube control panel; 22-luminous tube lamp holder; 23-eccentric disc; 24-receiving tube lamp holder; 25-receiving tube control board; 26-positioning grooves; 31-panel bearings; 32-encoder mounting panel threaded holes; 33-panel bearing collar; 211-luminous tube; 212-luminotron control plate temperature difference piece; 221-a light hole of the luminous tube lamp holder; 231-eccentric disc bearing spindle; 241-receiving tube lamp holder light hole; 251-receiving tube; 252-receiving tube control panel temperature difference plate.
Detailed Description
The present application will be described in further detail with reference to examples, but embodiments of the present application are not limited thereto.
Examples:
referring to fig. 1 to 6, an eccentric disc shaft encoder comprises an encoder back cover 1, an encoder core 2 and an encoder mounting panel 3, wherein:
the encoder back cover 1 is internally provided with a bottom shell bearing collar 11, a bottom shell bearing 13 is arranged in the bottom shell bearing collar 11, the outer axial surface of the bottom shell bearing 13 is in tight fit with the bottom shell bearing collar 11, the inner axial surface of the bottom shell bearing 13 is in tight fit with the main shaft of the encoder core 2, and the encoder back cover 1 is provided with a first threaded hole;
the encoder core part 2 sequentially comprises a luminous tube control plate 21, a luminous tube lamp holder 22, an eccentric disc 23, a receiving tube lamp holder 24 and a receiving tube control plate 25, wherein a luminous tube 211 is arranged on the luminous tube control plate 21, the luminous tube 211 is coaxially assembled with a light through hole arranged on the luminous tube lamp holder 22, and the inner diameter of a luminous tube lamp holder light through hole 221 on the luminous tube lamp holder 22 is matched with the outer diameter of the luminous tube 211; the receiving tube control board 25 is provided with a receiving tube 251, the receiving tube 251 is coaxially assembled with a receiving tube lamp holder light-passing hole 241 arranged on the receiving tube lamp holder 24, and the inner diameter of the receiving tube lamp holder light-passing hole 241 on the receiving tube lamp holder 24 is matched with the outer diameter of the receiving tube 251; the light-emitting tube lamp holder 22 and the receiving tube lamp holder 24 are overlapped on the axial end surface and coaxially assembled with the eccentric disc 23, and are respectively positioned at two sides of the eccentric disc 23, and positioning grooves 26 which are tightly matched and assembled with the bottom shell of the encoder back cover 1 are arranged on the outer axial surfaces of the light-emitting tube lamp holder 22 and the receiving tube lamp holder 24, so that eight groups of light gap coaxiality of the two lamp holders is ensured from the mechanical processing angle; the light emitting tube on the light emitting tube control board 21 is welded on the light emitting tube control board 21, belongs to hard links, is coaxially assembled with the light through hole of the light emitting tube lamp holder 22, and the light through hole of the light emitting tube lamp holder 22 is consistent with the light emitting tube, so that the light emitting tube control board 21 can be regarded as hard links, and is stably installed on the light emitting tube lamp holder 22. The receiving tube control plate 25 is installed in the same way as the receiving tube lamp holder 24; the encoder core 2 is provided with a positioning slot 26; the luminous tube control board 21 is provided with a luminous tube control board temperature difference piece 212, and the receiving tube control board 25 is provided with a receiving tube control board temperature difference piece 252 for adjusting the working temperatures of the luminous tube control board 21 and the receiving tube control board 25.
The encoder mounting panel 3, the encoder mounting panel 3 adopts an aluminum alloy die-casting milling process, a panel bearing lantern ring 33 is arranged in the encoder mounting panel 3, the encoder mounting panel 3 is coaxially mounted with the outer axial surface of the panel bearing 31 and the inner axial surface of the panel bearing 31 through the panel bearing lantern ring 33, the eccentric disc bearing main shaft 231 passes through the encoder core part 2 and is coaxially and tightly matched and connected with the inner axial surface of the bottom shell bearing 13, and the bottom shell bearing 13 is coaxially and tightly matched and connected with the bottom shell bearing lantern ring 11. The outer side of the bearing mounting collar 11 is provided with a positioning strip 12 which is tightly matched with a positioning groove 26 of the encoder core part 2 to be mounted, so that the encoder core part 2 is pushed to the bottom of the encoder mounting panel 3, and then an encoder bottom shell assembly is formed; the outer diameter shaft surface of the panel bearing 31 is assembled with the shaft of the panel bearing collar 33, the encoder back cover threaded hole 14 and the encoder mounting panel threaded hole 32 are assembled coaxially, and the end surfaces of the two are coincident (i.e. pushed to the bottom), so that the encoder assembly is formed.
Further, the light emitting tubes are a plurality of infrared light emitting diodes distributed along the circumference of the light emitting tube control board 21, and the receiving tubes are a plurality of infrared receiving diodes distributed along the circumference of the receiving tube control board 25 and the same number as the infrared light emitting diodes. Preferably, the number of the infrared light emitting diodes and the number of the infrared receiving diodes are 8.
Further, the diameter of the eccentric disc 23 is the same as the diameters of the luminous tube lamp holder 22 and the receiving lamp holder, the eccentricity of the eccentric disc 23 is slightly smaller than the radius of the light passing holes on the luminous tube lamp holder 22 and the receiving lamp holder 24, and when the eccentric disc 23 rotates, the area of the corresponding light passing hole shielded by the eccentric disc 23 changes.
Although the application has been described herein with reference to the above-described illustrative embodiments thereof, the foregoing embodiments are merely preferred embodiments of the present application, and it should be understood that the embodiments of the present application are not limited to the above-described embodiments, and that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope and spirit of the principles of this disclosure.
Claims (4)
1. An eccentric disc shaft encoder comprising an encoder back cover, an encoder core and an encoder mounting panel, wherein:
the encoder comprises an encoder rear cover, a bottom shell bearing sleeve ring is arranged in the encoder rear cover, a bottom shell bearing is arranged in the bottom shell bearing sleeve ring, the outer shaft surface of the bottom shell bearing is in tight fit with the bottom shell bearing sleeve ring, the inner shaft surface of the bottom shell bearing is in tight fit with a main shaft of a core part of the encoder, and the encoder rear cover is provided with a first threaded hole;
the encoder core part sequentially comprises a luminous tube control board, a luminous tube lamp holder, an eccentric disc, a receiving tube lamp holder and a receiving tube control board, wherein a luminous tube is arranged on the luminous tube control board, the luminous tube is coaxially assembled with a luminous tube lamp holder light-through hole arranged on the luminous tube lamp holder, and the inner diameter of the luminous tube lamp holder light-through hole is matched with the outer diameter of the luminous tube; the receiving tube control board is provided with a receiving tube, the receiving tube is coaxially assembled with a receiving tube lamp holder light-passing hole arranged on the receiving tube lamp holder, and the inner diameter of the receiving tube lamp holder light-passing hole is matched with the outer diameter of the receiving tube; the luminous tube lamp holder is overlapped with the axial end face of the receiving tube lamp holder, is coaxially assembled with the eccentric disc and is respectively positioned at two sides of the eccentric disc;
the encoder installation panel is internally provided with a panel bearing lantern ring, the panel bearing lantern ring is coaxially provided with a panel bearing, the panel bearing is coaxially installed with a bearing main shaft of an eccentric disc, the bearing main shaft of the eccentric disc penetrates through the encoder core part and is coaxially connected with a bottom shell bearing, and the encoder installation panel is provided with a second threaded hole corresponding to the first threaded hole.
2. The eccentric disc shaft encoder of claim 1, wherein the light emitting tubes are 8 infrared light emitting diodes distributed along the circumference of the light emitting tube control board, the receiving tubes are 8 infrared receiving diodes distributed along the circumference of the receiving tube control board, and a reading head consisting of the 8 light emitting tubes and the 8 receiving tubes is used for correcting phase and amplitude deviation of each other.
3. The eccentric disc shaft angle encoder of claim 2, wherein the diameter of the eccentric disc is the same as the diameters of the circle centers of the 8 light-passing holes of the luminous tube lamp holder and the light receiving lamp holder, the eccentric distance of the eccentric disc is slightly smaller than the radiuses of the light-passing holes of the luminous tube lamp holder and the light receiving lamp holder, and when the eccentric disc rotates, the area of the corresponding light-passing hole blocked by the eccentric disc changes.
4. An eccentric disc shaft angle encoder as in claim 1 wherein a locating bar is provided on the outside of the bottom shell bearing collar and a locating groove is provided on the outside of the encoder core that is a tight fit with the locating bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311270404.8A CN117146872A (en) | 2023-09-28 | 2023-09-28 | Eccentric disc shaft angle encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311270404.8A CN117146872A (en) | 2023-09-28 | 2023-09-28 | Eccentric disc shaft angle encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117146872A true CN117146872A (en) | 2023-12-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311270404.8A Pending CN117146872A (en) | 2023-09-28 | 2023-09-28 | Eccentric disc shaft angle encoder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117146872A (en) |
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2023
- 2023-09-28 CN CN202311270404.8A patent/CN117146872A/en active Pending
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