CN115371620A - Angle sensor arranged on central rotary joint - Google Patents
Angle sensor arranged on central rotary joint Download PDFInfo
- Publication number
- CN115371620A CN115371620A CN202210756178.3A CN202210756178A CN115371620A CN 115371620 A CN115371620 A CN 115371620A CN 202210756178 A CN202210756178 A CN 202210756178A CN 115371620 A CN115371620 A CN 115371620A
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- Prior art keywords
- rotary
- angle sensor
- ring
- central
- rotary shaft
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L39/00—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies
- F16L39/06—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies of the multiline swivel type, e.g. comprising a plurality of axially mounted modules
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses an angle sensor arranged on a central rotary joint, wherein the central rotary joint comprises a rotary body, a rotary shaft and end covers, the rotary body is cylindrical, the rotary shaft is inserted into the rotary body, the end covers are connected with one end of the rotary body, the angle sensor comprises rotary metal sheets arranged on the rotary shaft, and connecting rings of the static metal sheets arranged on the end covers and facing to one side of the rotary shaft, the static metal sheets are at least provided with two rings, a plurality of static metal sheets on at least one ring are arranged, the plurality of static metal sheets are uniformly arranged along the connecting rings in a ring array, tensioning structural members are arranged between the connecting rings and the end covers and/or between the rotary metal sheets and the rotary shaft, and the static metal sheets on at least two rings are respectively and electrically connected with a controller through wires. The angle sensor arranged on the central rotary joint has the characteristics of simple structure, convenience and quickness in use, stability and reliability in work, convenience in maintenance, low processing and manufacturing cost and the like.
Description
Technical Field
The invention relates to the field of hydraulic swivel joint technology, in particular to an angle sensor arranged on a central swivel joint.
Background
The excavator comprises an upper platform and a lower frame, wherein the upper platform is rotatably arranged on the lower frame. An oil tank, a pump, a control valve, and the like in a power system and a hydraulic system of the excavator are mounted on the upper deck. The lower frame is provided with hydraulic actuators such as a hydraulic motor for traveling, a dozer blade lifting cylinder and the like. Because the upper platform and the lower frame rotate relatively, a hydraulic actuator arranged on the lower frame needs to be connected with a hydraulic component on the upper platform through a rotary center joint.
The existing rotary center joint comprises a center joint body and a mandrel, wherein the center joint body is sleeved on the lower portion of the mandrel, the center joint body is arranged below and fixedly connected with a lower frame when the central joint body is installed, and the mandrel is arranged above and fixedly connected with an upper platform.
With the intellectualization of machinery, an angle sensor needs to be mounted on the excavator to detect the relative rotation angle between the upper platform and the lower frame. The angle sensor needs to be mounted on the centre of rotation line of the upper platform, and its stator and rotor need to be stationary relative to the upper platform and lower frame respectively, so the angle sensor is usually mounted on the centre of rotation joint.
When an angle sensor is installed on an existing rotary center connector, a stator of the angle sensor is fixed on the end face of a mandrel, a slender shaft is arranged in an oil return channel of the mandrel, the upper end of the slender shaft is fixedly connected with the stator of the angle sensor, and the lower end of the slender shaft extends downwards and is fixedly connected with a center connector body.
In the installation mode of the rotary center joint, the middle slender shaft is longer, needs to have better structural strength and has higher requirement on machining precision, the slender shaft is only fixed with the cover plate on the center joint body through threaded connection, and oil liquid is also communicated in a channel of the slender shaft, so that the slender shaft is suspended in an oil passage in the middle, the possibility of deflection exists in the rotating process, and the rotary angle cannot be truly reflected. In addition, the slender shaft occupies the oil passing space of the middle oil duct, so that the flow area is reduced, the back pressure of the oil duct is increased, and the oil drainage of the walking motor is not smooth.
The existing various angle sensors installed on the central rotary joint have the problems of complex structure, poor reliability, low measurement precision, inconvenience in maintenance and the like.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the angle sensor arranged on the central rotary joint, which has the advantages of simple structure, convenience in use, stability and reliability in work, convenience in maintenance and low processing and manufacturing cost.
In order to achieve the purpose, the invention provides an angle sensor arranged on a central rotary joint, the central rotary joint comprises a rotary body, a rotary shaft and an end cover, the rotary body is cylindrical, the rotary shaft is inserted into the rotary body, the end cover is connected with one end of the rotary body, the angle sensor comprises a rotary metal sheet arranged on the rotary shaft, and a connecting ring of a static metal sheet arranged on the end cover and facing to one side of the rotary shaft, the static metal sheet is at least provided with two rings, the static metal sheet on at least one ring is provided with a plurality of sheets, the plurality of static metal sheets are uniformly arranged along the connecting ring in an annular array, a tensioning structural member is arranged between the connecting ring and the end cover and/or between the rotary metal sheet and the rotary shaft, and the static metal sheets on at least two rings are respectively and electrically connected with a controller through leads.
In order to ensure that the rotating metal sheets are driven by the rotating shaft, in the rotating process, two annular static metal sheets positioned at different angle positions are connected together to form a conducting loop, and adjacent static metal sheets are not conducted, the preferred technical scheme is that the rotating metal sheets are arranged along the radial direction of the end part of the rotating shaft, the width of each rotating metal sheet is less than or equal to the width of any one of the plurality of static metal sheets, and the length of each rotating metal sheet is greater than the distance between the inner side of the outermost ring and the outer side of the innermost ring in at least two annular static metal sheets.
In order to facilitate the installation of the rotary metal sheet at the end part of the rotary shaft and the maintenance and replacement of the rotary metal sheet, a further preferred technical scheme is that the rotary metal sheet is arranged on one side of an annular disc, the annular disc is arranged at the end part of the rotary shaft, and one side of the annular disc provided with the rotary metal sheet faces the connecting ring of the static metal sheet.
In order to keep the rotating metal sheet and the stationary metal sheet in a close contact state at all times, it is further preferable that an elastic member is provided between the end of the rotating shaft and the annular disc, and a fixing member for the annular disc is further provided at the end of the rotating shaft.
In order to facilitate the processing and manufacturing of the static metal sheets, the number of the static metal sheets is reduced as much as possible, and the precision of the angle sensor can be improved.
In order to facilitate the processing and manufacturing of the static metal sheets, the number of the static metal sheets is reduced as much as possible, and the precision of the angle sensor can be improved.
In order to facilitate the processing and manufacturing of the static metal sheets, the number of the static metal sheets is reduced as much as possible, and the precision of the angle sensor can be improved.
In order to keep the rotating metal sheet and the stationary metal sheet in a close contact state all the time, it is further preferable that an elastic pad is provided between the connecting ring and the side of the end cover facing the rotating shaft.
In order to facilitate the transmission of the rotation angle signal of the rotating shaft to the controller through a wire, a further preferred technical scheme is that the static metal sheet is connected with a plug through a flat cable or a wire harness, and the plug is plugged with the controller.
In order to realize the relative rotation between the revolving body and the revolving shaft and simultaneously realize the flow of hydraulic oil between the revolving body and the revolving shaft and keep the mutual sealing between the revolving body and the revolving shaft, the further preferred technical scheme is that the revolving shaft is axially inserted into the revolving body from the front end of the revolving body, the front end of the revolving shaft extends out of the revolving body, the end cover is positioned at the rear end of the revolving shaft and fixed at the rear end of the revolving body, a plurality of axial oil circuit holes with different depths are axially arranged on the revolving shaft, one of the oil circuit holes is arranged at the center of the revolving shaft and is a central oil drainage hole, the rest of the oil circuit holes are distributed at the periphery of the central oil drainage hole and are main oil circuit holes, main oil ports with corresponding number are arranged on the revolving body and correspondingly communicated with the main oil circuit holes on the revolving shaft, and a dust ring, an O-shaped sealing ring, an anti-wear ring and a plurality of rotary sealing rings are arranged on the surface of an inner hole of the revolving body.
The invention has the advantages and beneficial effects that: the angle sensor arranged on the central rotary joint has the characteristics of simple structure, convenience and quickness in use, stability and reliability in work, convenience in maintenance, low cost in processing and manufacturing and the like.
The angle sensor is matched with the rotary metal sheets arranged on the rotary shaft through the static metal sheets arranged on the connecting rings, so that the static metal sheets distributed on at least two rings form a conducting loop through the contact with the rotary metal sheets. Therefore, when the rotating shaft drives the rotating metal sheet to rotate, the rotating metal sheet can connect the two annular static metal sheets on different phase angles to form a loop, and then the conducting signals of different phase angles can be sent out, so that the purpose of detecting the rotating angle of the rotating shaft is achieved. The angle of the rotating metal sheet is changed in the rotation process, so that the angle change state of the rotating metal sheet is connected with the rotating metal sheet through the contact between the plurality of static metal sheets on the two rings to form a loop, and signals forming the loop are transmitted to the controller. Therefore, the sensor has the advantages of simple structure, stable and reliable work and convenient maintenance or replacement.
Drawings
FIG. 1 is a schematic main sectional view of an angle sensor of the present invention disposed on a central swivel joint;
FIG. 2 isbase:Sub>A view taken along line A-A of FIG. 1;
FIG. 3 is another embodiment ofbase:Sub>A view in the direction A-A of FIG. 1;
FIG. 4 is a cross-sectional view B-B of FIG. 1;
fig. 5 is a cross-sectional view of a central swivel joint provided with an angle sensor according to the present invention.
In the figure: 1. a revolving body; 2. a rotating shaft; 3. an end cap; 4. rotating the metal sheet; 5. a stationary metal sheet; 5.1, annular metal sheets; 6. a connecting ring; 7. an annular disc; 8. an elastic member; 9. An elastic pad; 10. a plug; 11. a main oil passage hole; 12. the main oil port.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 to 5, the present invention is an angle sensor disposed on a central rotary joint, the central rotary joint includes a rotary body 1, a rotary shaft 2 and an end cover 3, the rotary body 1 is cylindrical, the rotary shaft 2 is inserted into the rotary body 1, the end cover 3 is connected with one end of the rotary body 1, the angle sensor includes a rotary metal sheet 4 disposed on the rotary shaft 2, a connecting ring 6 of a stationary metal sheet 5 mounted on the end cover 3 and facing one side of the rotary shaft 2, the stationary metal sheet 5 is provided with three rings, wherein a plurality of stationary metal sheets 5 on two rings are provided, and a plurality of stationary metal sheets 5 are uniformly disposed along the connecting ring 6 in a ring array, a tensioning structure is disposed between the connecting ring 5 and the end cover 3 and/or between the rotary metal sheet 4 and the rotary shaft 2, and the stationary metal sheets 5 on the three rings are electrically connected with a controller (not shown in the figure) through wires respectively.
In order to ensure that the rotating metal sheets 4 are driven by the rotating shaft 2, two annular static metal sheets 5 positioned at different angular positions are connected together to form a conducting loop in the rotating process, and the adjacent static metal sheets 5 are not conducted, the invention has the preferable technical scheme that the rotating metal sheets 4 are arranged along the radial direction of the end part of the rotating shaft 2, the width of the rotating metal sheets 4 is less than or equal to the width of any one of the plurality of static metal sheets 5, and the length of the rotating metal sheets 4 is greater than the distance between the inner side of the outermost ring and the outer side of the innermost ring in at least two annular static metal sheets 5.
In order to facilitate the mounting of the rotary metal sheet 4 at the end of the rotation shaft 2 and also the maintenance and replacement of the rotary metal sheet 5, it is a further preferred embodiment of the present invention that said rotary metal sheet 4 is mounted on one side of an annular disc 7, the annular disc 7 being arranged at the end of the rotation shaft 2 and the annular disc 7 being provided with a connecting ring 6 facing the stationary metal sheet 5 on the side of the rotary metal sheet 4.
In order to maintain the close contact between the rotating metal sheet 4 and the stationary metal sheet 5, the present invention further preferably has an elastic member 8 between the end of the rotating shaft 2 and the annular disc 7, and a fixing member for the annular disc 7 at the end of the rotating shaft 2, wherein the elastic member 8 is one of the aforementioned tension members, and the fixing member may be a fastening nut or a spring coil.
In order to facilitate the manufacturing of the stationary metal sheets 5, to minimize the number of the stationary metal sheets 5 and also to improve the accuracy of the angle sensor, it is also a preferred embodiment of the present invention that one of the two annular stationary metal sheets 5 is a continuous conductive annular metal sheet 5.1, and the annular metal sheet 5.1 may be even the innermost ring of the plurality of annular stationary metal sheets 5.
In order to facilitate the processing and manufacturing of the static metal sheets 5, the number of the static metal sheets 5 is reduced as much as possible, and the precision of the angle sensor can be improved.
In order to facilitate the processing and manufacturing of the static metal sheets 5, reduce the number of the static metal sheets 5 as much as possible, and improve the precision of the angle sensor, a further preferred embodiment of the present invention is that the connecting ring 6 is a plastic ring, one side of the plastic ring is provided with a groove for embedding the static metal sheets 5, and the static metal sheets 5 can be embedded in the groove.
In order to always maintain the close contact between the rotating metal sheet 4 and the stationary metal sheet 5, a further preferred embodiment of the present invention is to provide an elastic pad 9 between the connecting ring 6 and the side of the end cap 3 facing the rotation shaft 2, wherein the elastic pad 9 is one of the aforementioned tension structures.
In order to facilitate the transmission of the rotation angle signal of the rotation shaft 2 into the controller through the wire, a further preferred embodiment of the present invention is that the stationary metal plate 5 is connected to the plug 10 through a wire harness, and the plug 10 is plugged into the controller.
In order to realize the relative rotation between the revolving body 1 and the revolving shaft 2, and simultaneously realize the flow of hydraulic oil between the revolving body 1 and the revolving shaft 2, and keep the mutual sealing between the revolving body 1 and the revolving shaft 2, the further preferred embodiment of the invention is that the revolving shaft 2 is axially inserted into the revolving body 1 from one end of the revolving body 1, the other end of the revolving shaft 2 extends out of the revolving body 1, the end cover 3 is positioned at one end of the revolving shaft 2 and is fixed on the revolving body 1, a plurality of axial oil circuit holes with different depths are axially arranged on the revolving shaft 2, one of the oil circuit holes is arranged at the center of the revolving shaft 2 and is a central oil drain hole, the rest of the oil circuit holes are distributed at the periphery of the central oil drain hole and is a main oil circuit hole 11, a corresponding number of main oil ports 12 are arranged on the revolving body 1 and are correspondingly communicated with the main oil circuit hole 11 on the revolving shaft 2, and the surface of the inner hole of the revolving body 1 is provided with a dust ring, an O-shaped sealing ring, a multi-shaped sealing ring and a multi-shaped rotary sealing ring.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The angle sensor is characterized in that the angle sensor comprises a rotating metal sheet arranged on the rotating shaft and a connecting ring of a static metal sheet arranged on the end cover and facing to one side of the rotating shaft, the static metal sheet is at least provided with two rings, the static metal sheet on at least one ring is provided with a plurality of static metal sheets, the static metal sheets are uniformly arranged along the connecting ring in an annular array, a tensioning structural member is arranged between the connecting ring and the end cover and/or between the rotating metal sheet and the rotating shaft, and the static metal sheets on at least two rings are respectively and electrically connected with a controller through leads.
2. The angle sensor mounted on the central rotary joint of claim 1, wherein the rotating metal plate is disposed radially along the end of the rotary shaft, and the width of the rotating metal plate is less than or equal to the width of any one of the plurality of stationary metal plates, and the length of the rotating metal plate is greater than the distance between the inner side of the outermost ring and the outer side of the innermost ring of the at least two annular stationary metal plates.
3. The angle sensor provided on the central rotary joint according to claim 2, wherein the rotary metal piece is provided on one side of an annular disk provided on the end of the rotary shaft with the side of the annular disk provided with the rotary metal piece facing the stationary metal piece coupling ring.
4. The angle sensor provided on the central rotary joint according to claim 3, wherein an elastic member is provided between the end of the rotary shaft and the annular disk, and a fixing member of the annular disk is further provided at the end of the rotary shaft.
5. The angle sensor disposed on a central swivel joint of claim 1, wherein one of the at least two annular stationary metal plates is a continuous conductive annular metal plate.
6. The angle sensor mounted on the central rotary joint of claim 5, wherein the coupling ring is a printed circuit board and the stationary metal sheet is a metal layer remaining after a corrosion process on the printed circuit board.
7. The angle sensor mounted on a central swivel joint of claim 5, wherein the coupling ring is a plastic ring having a recess formed on one side for receiving the stationary metal plate, the stationary metal plate being received in the recess.
8. The angle sensor provided on the central rotary joint according to claim 6 or 7, wherein an elastic pad is provided between the connection ring and a side of the end cap facing the rotary shaft.
9. The angle sensor mounted on the central rotary joint of claim 8, wherein the stationary metal plate is connected to a plug by a flat cable or a wire harness, and the plug is connected to the controller.
10. The angle sensor arranged on the central rotary joint according to claim 1, wherein one end of the rotary shaft is axially inserted into the rotary body from the front end of the rotary body, the other end of the rotary shaft extends out of the rotary body, the end cover is positioned at one end of the rotary shaft and is fixed at the rear end of the rotary body, a plurality of axial oil circuit holes with different depths are axially arranged on the rotary shaft, one of the axial oil circuit holes is arranged at the center of the rotary shaft and is a central oil drainage hole, the rest of the axial oil circuit holes are distributed at the periphery of the central oil drainage hole and are main oil circuit holes, the rotary body is provided with a corresponding number of main oil ports which are correspondingly communicated with the main oil circuit holes on the rotary shaft, and a dustproof ring, an O-shaped sealing ring, an antiwear ring and a plurality of rotary sealing rings are arranged on the surface of the inner hole of the rotary body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210756178.3A CN115371620A (en) | 2022-06-30 | 2022-06-30 | Angle sensor arranged on central rotary joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210756178.3A CN115371620A (en) | 2022-06-30 | 2022-06-30 | Angle sensor arranged on central rotary joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115371620A true CN115371620A (en) | 2022-11-22 |
Family
ID=84062467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210756178.3A Pending CN115371620A (en) | 2022-06-30 | 2022-06-30 | Angle sensor arranged on central rotary joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115371620A (en) |
-
2022
- 2022-06-30 CN CN202210756178.3A patent/CN115371620A/en active Pending
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