CN106788611B - Rotary communication device based on magnetic field coupling - Google Patents
Rotary communication device based on magnetic field coupling Download PDFInfo
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- CN106788611B CN106788611B CN201611105179.2A CN201611105179A CN106788611B CN 106788611 B CN106788611 B CN 106788611B CN 201611105179 A CN201611105179 A CN 201611105179A CN 106788611 B CN106788611 B CN 106788611B
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- 238000004891 communication Methods 0.000 title claims abstract description 93
- 238000010168 coupling process Methods 0.000 title claims abstract description 27
- 230000008878 coupling Effects 0.000 title claims abstract description 26
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 26
- 238000004804 winding Methods 0.000 claims abstract description 20
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 8
- 239000011521 glass Substances 0.000 claims abstract description 7
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 6
- 230000008054 signal transmission Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000003292 glue Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
- H04B5/26—Inductive coupling using coils
- H04B5/263—Multiple coils at either side
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/72—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for local intradevice communication
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
- H01F2038/143—Inductive couplings for signals
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Abstract
The invention relates to a rotary communication device based on magnetic field coupling, which comprises a stator, a rotor, a rotary communication coil assembly, a bearing, an adjusting screw and an adjusting washer, wherein the adjusting screw and the adjusting washer are used for adjusting the communication quality; the rotary communication coil assembly comprises an inner ring coil and an outer ring coil, wherein the inner ring coil is formed by winding an enameled wire on an outer ring of cylindrical ferrite in a rotary mode, and the outer ring coil is formed by spirally winding the enameled wire on an inner ring of aviation organic glass; the inner ring coil is fixed on the rotor, the outer ring coil is fixed on the stator, the double bearings ensure that the inner ring coil and the outer ring coil are basically coaxial, the radial coaxiality of the inner ring coil and the outer ring coil is adjusted through an adjusting screw arranged on the stator, and the axial centering of the inner ring coil and the outer ring coil is adjusted through an adjusting washer arranged on the rotor; the signal is input from the inner ring coil and output from the outer ring coil, or input from the outer ring coil and output from the inner ring coil. The invention has the advantages of small structure size, low cost, easy installation and adjustment and the like, and can well realize short-distance data transmission.
Description
Technical Field
The invention relates to a rotary communication device based on magnetic field coupling, and belongs to the field of wireless communication.
Background
Data transmission between the fixed end and the rotating end of the high-speed rotating mechanism is limited by the structural form and the high-frequency characteristics of data, signal transmission cannot be completed by adopting wire connection or mechanical slip ring contact, and a high-bandwidth wireless transmission mode needs to be adopted.
The coupling communication is based on an inductive coupling mode, the antenna adopts a closed loop coil, alternating current generates an alternating magnetic field through a sending coil, and a receiving coil responds to the change of the magnetic field and generates alternating voltage to be output, so that a communication link is established for data transmission. In the fields of industrial, medical and military applications, for example, the rotation of a robot detection device along with a bearing platform, a downlink communication link of a radar scanning mechanism and the like, a transmission device is required to have the characteristics of miniaturization, low cost, simple structure and the like as far as possible, and the magnetic field coupling mode has more advantages.
In the coupling process, the receiving coil utilizes the alternating magnetic energy of the non-radiated structure generated by the transmitting coil, so that the communication quality is best when the transmitting coil and the receiving coil are coaxially arranged. However, in the rotating process, there are many factors affecting the coaxiality, and how to maintain the coaxiality of the receiving coil and the transmitting coil in the rotating structure to realize the short-distance communication is an urgent technical problem to be solved in the field.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a rotary communication device based on magnetic field coupling. The device has small structure size, good stability and high coupling efficiency, and solves the problem of near-field communication of the rotating structure.
The purpose of the invention is realized by the following technical scheme: a rotary communication device based on magnetic field coupling, comprising: the rotor comprises a rotor shaft (1), a stator sleeve (3), a front end cover (2), a rear end cover (7), a first bearing, a second bearing, an inner ring coil (4) and an outer ring coil (5);
the rotor shaft (1) is rotatable about its axis;
the front end cover (2) is sleeved at the front end of the rotor shaft (1) through a first bearing;
the rear end cover (7) is sleeved at the rear end of the rotor shaft (1) through a second bearing;
the stator sleeve (3) is fixed between the front end cover (2) and the rear end cover (7);
the inner ring coil (4) is fixed in the middle of the rotor shaft (1); the outer ring coil (5) is sleeved outside the inner ring coil (4) and fixed on the stator sleeve (3), and the distance between the inner ring coil (4) and the outer ring coil (5) is d.
The rotor shaft (1) is provided with a first protrusion for limiting a first bearing and a second protrusion for limiting an inner ring coil (4), and the rotor shaft (1) is a stepped shaft with an axial groove.
The bearing further comprises a shaft sleeve (6) arranged between the inner ring coil (4) and the second bearing.
The device also comprises a support ring (11) and an adjusting screw (12); the adjusting screw (12) is arranged between the outer ring coil (5) and the stator sleeve (3) and sequentially penetrates through the stator sleeve (3) and the support ring (11) along the radial direction.
The stator comprises a stator sleeve (3) and a front end cover (2), and further comprises a fastener screw (9) and a countersunk screw (14), wherein the fastener screw (9) fixes the front end cover (2) to the stator sleeve (3) along the axial direction; a countersunk screw (14) axially secures the rear end cap (7) to the stator sleeve (3).
One side of the rotor shaft (1) is provided with a groove, and the inner ring coil (4) leads a lead wire to the outside of the rotary communication device through the groove.
The stator sleeve (3) has a through hole through which the outer ring coil (5) leads a lead wire to the outside of the rotary communication device.
The inner ring coil (4) is formed by spirally winding an enameled wire along the outer ring of the ferrite, and the wire inlet and the wire outlet are aligned along the axial direction.
The outer ring coil (5) is formed by spirally winding an enameled wire along the inner ring of the organic glass ring, and the wire inlet and the wire outlet are axially aligned; preferably, the method further comprises the following steps: the rotor comprises an inner adjusting washer (10) and an outer adjusting washer (13), wherein the inner adjusting washer (10) is located between a rotor shaft (1) and a bearing (8-1), and the outer adjusting washer (13) is located between a stator sleeve (3) and a rear end cover (7); the inner adjusting washer (10) and the outer adjusting washer (13) can adjust the axial centering of the inner ring coil (4) and the outer ring coil (5).
A rotary communication device based on magnetic field coupling, comprising: the motor comprises a rotor shaft (16), a stator sleeve (15), a front end cover (2-1), a rear end cover (7-1), a first bearing (8-3), a second bearing (8-2), a first inner ring coil (4-1), a first outer ring coil (5-1), a second inner ring coil (4-2), a second outer ring coil (5-2) and a shielding ring (18);
the rotor shaft (16) being rotatable about its axis;
the front end cover (2-1) is sleeved at the front end of the rotor shaft (16) through a first bearing;
the rear end cover (7-1) is sleeved at the rear end of the rotor shaft (16) through a second bearing;
the stator sleeve (15) is fixed between the front end cover (2-1) and the rear end cover (7-1);
the first inner ring coil (4-1) is fixed on the rotor shaft (1) and is positioned at the rear part of the first bearing (8-3); the first outer ring coil (5-1) is sleeved on the first inner ring coil (4-1)The outside is fixed by a stator sleeve (15), and the distance between the first inner ring coil (4-1) and the first outer ring coil (5-1) is d1；
The second inner ring coil (4-2) is fixed on the rotor shaft (1) and positioned in front of the second bearing (8-2); the second outer ring coil (5-2) is sleeved outside the second inner ring coil (4-2) and fixed through the stator sleeve (15), and the distance between the second inner ring coil (4-2) and the second outer ring coil (5-2) is d2；
And a shielding ring (18) is sleeved in the middle of the rotor shaft (16) and used for shielding magnetic field interference.
d1And d20.5 +/-0.02 mm needs to be satisfied at the same time; the clearance between the inner ring coil 4-1 and the outer ring coil 5-1 is d1The axial offset of the inner loop coil 4-1 and the outer loop coil 5-1 is L1The gap between the inner ring coil 4-2 and the outer ring coil 5-2 is d2The axial offset of the inner loop coil 4-2 and the outer loop coil 5-2 is L2；L1And L2The rotating communication coil assembly is required to meet 0 +/-0.05 mm at the same time and consists of an inner ring coil (4) and an outer ring coil (5) meeting the size requirement.
The outer diameter of the rotary communication device is larger than or equal to phi 15mm, and the length of the rotary communication device is larger than or equal to 10 mm.
The middle of the rotor shaft (1) is provided with a first bulge, the first inner ring coil (4-1) abuts against the front end of the first bulge, the second inner ring coil (4-2) abuts against the rear end of the first bulge, and the shielding ring (18) is sleeved on the first bulge.
The first shaft sleeve (6-1) is arranged between the first inner ring coil (4-1) and the first bearing (8-3); and the second shaft sleeve (6-2) is arranged between the second inner ring coil (4-2) and the second bearing (8-2).
The device also comprises a first support ring (11-1) and a first adjusting screw (12-1), a second support ring (11-2) and a first adjusting screw (12-2); the first supporting ring (11-1) is sleeved between the first outer ring coil (5-1) and the stator sleeve (15), and the first adjusting screw (12-1) sequentially penetrates through the stator sleeve (15) and the first supporting ring (11-1) along the radial direction and abuts against the outer ring of the first outer ring coil (5-1); the second support ring (11-2) is sleeved between the second outer ring coil (5-2) and the stator sleeve (15), and the second adjusting screw (12-2) sequentially penetrates through the stator sleeve (15) and the second support ring (11-2) along the radial direction and abuts against the outer ring of the second outer ring coil (5-2).
The adjusting device also comprises a first adjusting shim (10-1) arranged between the second bearing (8-2) and the second shaft sleeve (6-1) and a second adjusting shim (10-2) arranged between the first bearing (8-3) and the second shaft sleeve (6-2).
A fastener screw (9-1) axially fixes the front end cover (2-1) to the stator sleeve (15); a countersunk screw (14-1) axially fixes the rear end cap (7-1) to the stator sleeve (15).
The rotor shaft (16) is provided with a groove on one side, and the first inner ring coil (4-1) and the second inner ring coil (4-2) lead wires to the outside of the rotary communication device through the grooves.
The stator sleeve (15) has a through hole through which the first outer ring coil (5-1) and the second outer ring coil (5-2) lead wires to the outside of the rotary communication device.
The inner ring coil (4-1) and the outlet of the inner ring coil (4-2) form an angle of 180 DEG
Compared with the prior art, the invention has the following advantages:
(1) the invention has simple structure, easy assembly and adjustment, small structure, maximum outer diameter of phi 20mm, length of 20mm, minimum outer diameter of phi 15mm and length of 10mm, and is particularly suitable for signal transmission of a rotator with limited space.
(2) The invention adopts double bearings for fixation, has good coaxiality and stable dynamic performance, and can simultaneously meet the requirement of the coaxiality in the assembly and adjustment of a plurality of groups of magnetic field coupling coils.
(3) Compared with an optical coupler communication device, the structure of the invention has the advantages that the manufacturing cost is 50 percent lower, the manufacturing cost is equivalent to that of a ring-cutting communication device, and the problem of overlarge axial interference force of ring-cutting communication is solved.
(4) The structure of the invention has wide application range, is suitable for the communication of signals of various frequency bands, and is suitable for the communication of low-speed and high-speed relative rotation motion.
(5) The invention has good expansibility, can expand a plurality of groups of coils for two-way communication or multi-way communication, and meets various communication requirements.
Drawings
FIG. 1 is a schematic view of a magnetically coupled rotary communication device of the present invention;
FIG. 2 is a schematic view of a communication coil assembly of the present invention;
FIG. 3 is a schematic diagram of the inner loop winding of the present invention;
FIG. 4 is a diagram illustrating the outer loop winding of the present invention;
FIG. 5 illustrates a method for tuning a rotating communication device according to the present invention;
FIG. 6 is a schematic view of a dual channel rotary communication device according to the present invention;
fig. 7 is a schematic diagram of a lead of the dual-channel rotary communication device of the present invention, wherein fig. 7(a) is a schematic diagram of a lead of the dual-channel rotary communication device of the present invention, and fig. 7(b) is a schematic diagram of a stator lead of the dual-channel rotary communication device of the present invention.
Detailed Description
The basic idea of the invention is as follows: the rotary communication device based on magnetic field coupling comprises a stator, a rotor, a rotary communication coil assembly, a bearing, an adjusting screw and an adjusting washer, wherein the adjusting screw and the adjusting washer are used for adjusting communication quality; the rotary communication coil assembly comprises an inner ring coil and an outer ring coil, wherein the inner ring coil is formed by winding an enameled wire on an outer ring of cylindrical ferrite in a rotary mode, and the outer ring coil is formed by spirally winding the enameled wire on an inner ring of aviation organic glass; the inner ring coil is fixed on the rotor, the outer ring coil is fixed on the stator, the double bearings ensure that the inner ring coil and the outer ring coil are basically coaxial, the radial coaxiality of the inner ring coil and the outer ring coil is adjusted through an adjusting screw arranged on the stator, and the axial centering of the inner ring coil and the outer ring coil is adjusted through an adjusting washer arranged on the rotor; the signal is input from the inner ring coil and output from the outer ring coil, or input from the outer ring coil and output from the inner ring coil. The invention has the advantages of small structure size, low cost, easy installation and adjustment and the like, and can well realize short-distance data transmission.
The rotary communication device based on magnetic field coupling according to the present invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the rotary communication device includes: the rotor shaft 1, the stator sleeve 3, the front end cover 2, the rear end cover 7, the bearing 8 (comprising a first bearing and a second bearing), the rotary communication coil assembly, an adjusting screw 12 for adjusting the communication quality, an inner adjusting washer 10 and an outer adjusting washer 13, a shaft sleeve 6 designed for facilitating the communication coil outgoing line, an outer ring support ring 11, a fastener pan head screw 9 and a countersunk screw 14.
The rotary communication device based on magnetic field coupling according to the present invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the rotary communication device includes: the rotor shaft 1, the stator sleeve 3, the front end cover 2, the rear end cover 7, the bearing 8, the rotary communication coil assembly, an adjusting screw 12, an inner adjusting washer 10 and an outer adjusting washer 13 for adjusting communication quality, a shaft sleeve 6, an outer ring support ring 11, a fastener pan head screw 9 and a countersunk screw 14 which are designed for facilitating communication coil outgoing lines. As shown in fig. 2, the rotary communication coil assembly includes: an inner loop coil 4 and an outer loop coil 5.
A stator sleeve 3 of a rotary communication device fixes a rotor shaft 1 on a central axis of the rotary communication device through a front end cover 2, a bearing 8-1, a rear end cover 7 and a bearing 8, an adjusting washer 13 is arranged between the stator sleeve 3 and the rear end cover 7, the rotor shaft 1 is a stepped shaft with an axial wiring groove, a small stepped support bearing 8-1 is arranged in the middle of the rotor shaft, an adjusting washer 10 is arranged in the middle of the rotor shaft, a large stepped support inner ring coil 4 is arranged, a stepped shaft sleeve 6 with a radial wiring groove is arranged between the inner ring coil 4 and the bearing 8, a lead of the inner ring coil 4 passes through the wiring groove of the rotor shaft 1 through the wiring groove of the shaft sleeve 6 and is led out of the rotary communication device, the stator sleeve 3 fixes an outer ring support ring 11 and an outer ring coil 5 at the central position through four adjusting screws 12, the adjusting screws 12 are stepped screws with large diameter and thread and, four wiring holes are uniformly distributed on the circumference of 45 degrees with the screw holes, four positioning holes are formed in the positions of the outer ring support ring 11 corresponding to the screw holes of the stator sleeve 3, four wiring grooves are formed in the positions of the outer ring support ring 11 corresponding to the wiring holes of the stator sleeve 3, the outer ring coil 5 is pressed in the outer ring support ring 11, and a wire of the outer ring coil 5 passes through the corresponding wiring hole of the stator sleeve 3 through any wiring groove of the outer ring support ring 11 and is led out of the rotary communication device; the inner ring coil 4 rotates along with the rotor shaft 1 relative to the outer ring coil 5 fixed along with the stator sleeve 3, and signal transmission is realized through an alternating magnetic field.
As shown in fig. 3, the inner loop coil 4 is formed by spirally winding an enameled wire around the ferrite outer ring. The ferrite model is selected to be GTO16, ring external diameter 5 ~ 8mm, internal diameter 3 ~ 5mm, high 5mm, and the wire winding mode is as follows:
(1) winding a 0.1-0.5 mm thick enameled wire for 7-12 circles in total, wherein the coils are closely arranged;
(2) the wire inlet and the wire outlet are arranged at any positions on the circle, but the wire inlet and the wire outlet are necessarily arranged on the same axial bus;
(3) the lead-out length of the thread end is 120 plus or minus 10 mm;
(4) the winding area, the outgoing line and the incoming line are all soaked in varnish to prevent short circuit.
As shown in fig. 4, the outer loop coil 5 is formed by spirally winding an enameled wire along the inner loop of the organic glass loop, the inner diameter of the loop is 5.5-12 mm, and the winding mode is as follows:
(1) winding a 0.1-0.5 mm thick enameled wire for 7-12 circles in total, wherein the coils are closely arranged;
(2) the wire inlet and the wire outlet are positioned at any groove position on the circle, but the wire inlet and the wire outlet are necessarily positioned on the same axial bus;
(3) the lead-out length of the thread end is 120 plus or minus 10 mm;
(4) the winding area, the outgoing line and the incoming line are all soaked in varnish to prevent short circuit.
The inner ring coil (4) is formed by spirally winding an enameled wire along the outer ring of the ferrite, and the wire inlet and the wire outlet are aligned along the axial direction; the outer ring coil (5) is formed by spirally winding an enameled wire along the inner ring of the organic glass ring, and the wire inlet and the wire outlet are aligned along the axial direction.
The setup of the single-channel and dual-channel rotary communication devices is described in connection with example 1 and example 2, respectively.
1. Example 1
As shown in fig. 1, the tuning method of the single-channel rotary communication device is as follows:
(1) after the outer loop coil 5 is wound as shown in fig. 4, the enameled wire on one side of the notch is wound around the organic glass ring through the notch and is doubled with the enameled wire on the other side, and a heat-shrinkable sleeve is sleeved for protection after the twisted pair. The outer ring coil 5 is pressed in the outer ring support ring 11 through over-fit, the outer ring support ring 11 axially positions the outer ring coil 5 through a contact end surface on the stator sleeve 3, and the outer ring coil 5 is radially locked through four adjusting screws 12. In the process of assembling the outer ring coil 5, the lead of the outer ring coil penetrates through the wiring hole on the stator sleeve, and the lead is protected in the wiring hole by glue filling after being tensioned.
(2) After the inner loop coil 4 is wound as shown in fig. 3, the enameled wire on any side is wound around the ferrite and is connected with the enameled wire on the other side in parallel, and the enameled wire is twisted and then sheathed with a heat-shrinkable sleeve for protection. And assembling the inner ring coil 4 on the rotor shaft 1, and axially positioning the inner ring coil 4 through the contact end surface with the rotor shaft 1. A groove is formed in the rotor shaft 1 and used for leading out a lead wire of the inner ring coil 4, the lead wire of the inner ring coil 4 is flatly placed in a wiring groove in the rotor shaft 1, and a shaft sleeve 6 and a bearing 8 are sequentially arranged on one side of the inner ring coil 4 and axially compressed. The lead of the inner ring coil 4 is led to the outside of the rotary communication device along the groove of the rotor shaft 1, and the lead of the inner ring coil 4 is fixed without moving under the extrusion of the inner ring of the bearing 8.
(3) And assembling an adjusting washer 10, a bearing 8-1, a front end cover 2, an adjusting washer 13, a rear end cover 7, a locking screw 9 and a screw 14 in sequence to finish axial fastening of the rotary communication device.
(4) Referring to fig. 5, the communication performance of the rotary communication device is detected. When signals are input from any end and output from the other end, the inner ring coil 4 and the outer ring coil 5 are matched without problems, and the assembly of the structural part basically meets the magnetic field coupling requirement. Rotating the rotor shaft 1, wherein an input signal is a standard sine wave, if the output signal has sine wave amplitude deviation, adjusting the coaxiality of the inner ring coil 4 and the outer ring coil 5 through the adjusting screw 12 to enable the value of the gap d to meet the requirement of 0.5 +/-0.02 mm so as to achieve error-free signal output; if the output signal has sine wave deformation and poor signal quality, the axial alignment of the inner ring coil 4 and the outer ring coil 5 is adjusted by increasing or decreasing the inner adjusting washer 10 and the outer adjusting washer 13, so that the value of the axial deviation L meets the requirement of 0 +/-0.05 mm, and the signal is output without error.
The invention also discloses a preferable signal coupling quality adjusting method of the rotary communication device based on magnetic field coupling, which comprises the following steps: signals are input from any end, signals are output from the other end, a stator sleeve (3) is fixed, and a rotor shaft (1) is rotated; if the amplitude attenuation of the output signal is serious and the alternating signal is asymmetric, adjusting the coaxiality of the inner ring coil (4) and the outer ring coil (5) through an adjusting screw (12) to enable the value d to be within the required range; if the amplitude attenuation of the output signal is serious and the top of the signal is deflected, the axial centering of the inner ring coil (4) and the outer ring coil (5) is adjusted through the inner adjusting washer (10) and the outer adjusting washer (13), so that the L value is in a required range.
2. Example 2
The double-channel magnetic coupling rotary communication device is characterized in that a shielding ring (18) for shielding a magnetic field and a fixed clamping ring (17) are arranged between two rotary communication coil assemblies; the inner ring coil (4-1) and the outlet of the inner ring coil (4-2) are arranged at 180 degrees, and a lead is led to the outside of the rotary communication device through a wiring groove of the rotor shaft (16); the wire outlets of the outer ring coil (5-1) and the outer ring coil (5-2) are arranged in 180 degrees, and the wires are led to the outside of the rotary communication device through wire routing holes uniformly distributed on the circumference of the stator sleeve (15); the outer diameter of the rotary communication device can be as small as phi 15 mm. The length of the single-channel rotary communication device can be as small as 10 mm.
As shown in fig. 6, the dual-channel magnetic coupling rotary communication device can realize bidirectional data transmission at both ends of the rotary mechanism. Compared with a single-channel rotary communication device, the double-channel rotary communication device is provided with two groups of rotary communication coil assemblies, a stator sleeve 15 and a rotor shaft 16 which are lengthened, and a shielding ring 18 and a fixed snap ring 17 which are used for shielding magnetic field interference are arranged between the two rotary communication coil assemblies. The adjusting method of the dual-channel rotary communication device comprises the following steps:
(1) the outer ring coil 5-1 is pressed in the outer ring support ring 11-1 through over fit and assembled to the front end of the stator sleeve 15 from the front, the outer ring support ring 11-1 axially positions the outer ring coil 5-1 through a contact end face on the stator sleeve 15, and the outer ring coil 5-1 is radially locked through four adjusting screws 12-1. In the process of assembling the outer ring coil 5-1, the lead wires of the outer ring coil 5-1 pass through the wiring holes uniformly distributed on the circumference of the stator sleeve 15, and are protected by glue filling in the wiring holes after being tensioned.
(2) The front end cover 2-1 is assembled at the front end of the stator sleeve 15 and is fastened through a screw 9-1.
(3) The shield ring 18 is fitted to the intermediate end face of the rotor shaft 16 from the front, and the shield ring 18 is axially positioned by the contact face with the rotor shaft 16 and is pressed by the fixing snap ring 17. The inner ring coil 4-1 is assembled to the front end of the rotor shaft 16 from the front, and the inner ring coil 4-1 is axially positioned by the end face contacting the rotor shaft 16. Two symmetrical grooves are formed in the rotor shaft 16, and one groove is used for leading out an outgoing line of the inner ring coil 4-1. And the inner ring coil 4-2 is assembled to the rear end of the rotor shaft 16 from the rear, the inner ring coil 4-2 is axially positioned through the contact end surface with the rotor shaft 16, and the lead-out wire of the inner ring coil 4-2 is led out from the other groove of the rotor shaft 16. The inner ring coil 4 and the inner ring coil 4-1 are placed at 180 ° by two grooves symmetrically formed on the rotor shaft 16, as shown in fig. 7 (a).
(4) The front end of the rotor shaft 16 is sequentially provided with a shaft sleeve 6-1, an adjusting washer 10-1 and a bearing 8-3, and the rear end is provided with a shaft sleeve 6-2.
(5) The assembled rotor shaft 16 is mounted to the front end cap 2-1 on the stator sleeve 15.
(6) The outer ring coil 5-2 is pressed in the outer ring support ring 11-2 through over fit and assembled to the rear end of the stator sleeve 15 from the rear, the outer ring support ring 11-2 axially positions the outer ring coil 5-2 through a contact end face on the stator sleeve 15, and the outer ring coil 5-2 is radially locked through four adjusting screws 12-2. In the assembly process of the outer loop coil 5-2, the lead direction of the outer loop coil 5-2 and the lead direction of the outer loop coil 5-1 are placed at 180 ° as shown in fig. 7 (b). And (3) leading wires of the outer ring coils 5-2 penetrate through wire holes in the stator sleeve 15, and are protected by glue filling in the wire holes after being tensioned.
(7) And assembling an adjusting washer 10-2, a bearing 8-2 and a rear end cover 7-1 in sequence, and completing axial fastening of the rotary communication device through a screw 14-1.
(8) The detection method according to example 1(4) detects the communication performance of two rotary communication coil assemblies of the dual-channel rotary communication device. Make the clearance d1And d2Simultaneously satisfies 0.5 +/-0.02 mm and has L axial offset1And L2Simultaneously satisfy 0 ±)0.05mm。
The above description is only for the best mode of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Those skilled in the art will appreciate that the invention may be practiced without these specific details.
Claims (7)
1. A rotary communication device based on magnetic field coupling, comprising: the rotor comprises a rotor shaft (1), a stator sleeve (3), a front end cover (2), a rear end cover (7), a first bearing, a second bearing, an inner ring coil (4) and an outer ring coil (5);
the rotor shaft (1) is rotatable about its axis; the front end cover (2) is sleeved at the front end of the rotor shaft (1) through a first bearing; the rear end cover (7) is sleeved at the rear end of the rotor shaft (1) through a second bearing; the stator sleeve (3) is fixed between the front end cover (2) and the rear end cover (7); the inner ring coil (4) is fixed in the middle of the rotor shaft (1); the outer ring coil (5) is sleeved outside the inner ring coil (4) and fixed on the stator sleeve (3), and the distance between the inner ring coil (4) and the outer ring coil (5) is d;
the inner ring coil (4) rotates along with the rotor shaft (1) relative to the outer ring coil (5) fixed along with the stator sleeve (3), and signal transmission is realized through an alternating magnetic field;
one side of the rotor shaft (1) is provided with a groove, and the inner ring coil (4) leads a lead wire to the outside of the rotary communication device through the groove;
the bearing further comprises a shaft sleeve (6) arranged between the inner ring coil (4) and the second bearing;
the device also comprises a support ring (11) and an adjusting screw (12); the adjusting screw (12) is arranged between the outer ring coil (5) and the stator sleeve (3) and sequentially penetrates through the stator sleeve (3) and the support ring (11) along the radial direction;
the rotor shaft (1) is provided with a first protrusion for limiting a first bearing and a second protrusion for limiting an inner ring coil (4), and the rotor shaft (1) is a stepped shaft with an axial groove;
the stator comprises a stator sleeve (3) and a front end cover (2), and further comprises a fastener screw (9) and a countersunk screw (14), wherein the fastener screw (9) fixes the front end cover (2) to the stator sleeve (3) along the axial direction; a countersunk screw (14) axially fixes the rear end cover (7) to the stator sleeve (3);
the stator sleeve (3) has a through hole through which the outer ring coil (5) leads a lead wire to the outside of the rotary communication device;
the inner ring coil (4) is formed by spirally winding an enameled wire along the outer ring of the ferrite, and the wire inlet and the wire outlet are aligned along the axial direction;
the outer ring coil (5) is formed by spirally winding an enameled wire along the inner ring of the organic glass ring, and the wire inlet and the wire outlet are axially aligned;
further comprising: the rotor comprises an inner adjusting washer (10) and an outer adjusting washer (13), wherein the inner adjusting washer (10) is located between a rotor shaft (1) and a bearing (8-1), and the outer adjusting washer (13) is located between a stator sleeve (3) and a rear end cover (7); the inner adjusting washer (10) and the outer adjusting washer (13) can adjust the axial centering of the inner ring coil (4) and the outer ring coil (5).
2. A rotary communication device based on magnetic field coupling, comprising: the motor comprises a rotor shaft (16), a stator sleeve (15), a front end cover (2-1), a rear end cover (7-1), a first bearing (8-3), a second bearing (8-2), a first inner ring coil (4-1), a first outer ring coil (5-1), a second inner ring coil (4-2), a second outer ring coil (5-2) and a shielding ring (18);
the rotor shaft (16) being rotatable about its axis;
the front end cover (2-1) is sleeved at the front end of the rotor shaft (16) through a first bearing;
the rear end cover (7-1) is sleeved at the rear end of the rotor shaft (16) through a second bearing;
the stator sleeve (15) is fixed between the front end cover (2-1) and the rear end cover (7-1);
the first inner ring coil (4-1) is fixed on the rotor shaft (1) and is positioned at the rear part of the first bearing (8-3); the first outer ring coil (5-1) is sleeved outside the first inner ring coil (4-1) and fixed through the stator sleeve (15), and the distance between the first inner ring coil (4-1) and the first outer ring coil (5-1) is d1；
The second inner ring coil (4-2) is fixed on the rotor shaft (1) and positioned in front of the second bearing (8-2); the second outer ring coil (5-2) is sleeved outside the second inner ring coil (4-2) and fixed through the stator sleeve (15), and the distance between the second inner ring coil (4-2) and the second outer ring coil (5-2) is d2；
A shielding ring (18) is sleeved in the middle of the rotor shaft (16) and used for shielding magnetic field interference;
the clearance between the first inner ring coil (4-1) and the first outer ring coil (5-1) is d1The axial offset of the first inner ring coil (4-1) and the first outer ring coil (5-1) is L1The gap between the second inner ring coil (4-2) and the second outer ring coil (5-2) is d2The axial offset of the second inner ring coil (4-2) and the second outer ring coil (5-2) is L2；d1And d2Should satisfy 0.5 + -0.02 mm, L1And L20 plus or minus 0.05mm needs to be satisfied at the same time;
the middle part of the rotor shaft (1) is provided with a first bulge, a first inner ring coil (4-1) abuts against the front end of the first bulge, a second inner ring coil (4-2) abuts against the rear end of the first bulge, and the shielding ring (18) is sleeved on the first bulge;
the first shaft sleeve (6-1) is arranged between the first inner ring coil (4-1) and the first bearing (8-3); a second bushing (6-2) arranged between the second inner ring coil (4-2) and the second bearing (8-2);
the device also comprises a first adjusting shim (10-1) arranged between the first bearing (8-3) and the first shaft sleeve (6-1) and a second adjusting shim (10-2) arranged between the second bearing (8-2) and the second shaft sleeve (6-2);
a fastener screw (9-1) axially fixes the front end cover (2-1) to the stator sleeve (15); a countersunk screw (14-1) axially fixes the rear end cap (7-1) to the stator sleeve (15).
3. The rotary communication device according to claim 2, wherein the rotary communication device has an outer diameter of 15mm or more and a length of 10mm or more.
4. The rotary communication device based on magnetic field coupling according to claim 2, further comprising a first support ring (11-1) and a first adjustment screw (12-1), a second support ring (11-2) and a first adjustment screw (12-2); the first supporting ring (11-1) is sleeved between the first outer ring coil (5-1) and the stator sleeve (15), and the first adjusting screw (12-1) sequentially penetrates through the stator sleeve (15) and the first supporting ring (11-1) along the radial direction and abuts against the outer ring of the first outer ring coil (5-1); the second support ring (11-2) is sleeved between the second outer ring coil (5-2) and the stator sleeve (15), and the second adjusting screw (12-2) sequentially penetrates through the stator sleeve (15) and the second support ring (11-2) along the radial direction and abuts against the outer ring of the second outer ring coil (5-2).
5. The rotary communication device based on magnetic field coupling according to claim 2, wherein the rotor shaft (16) has a groove on one side, and the first inner ring coil (4-1) and the second inner ring coil (4-2) lead wires to the outside of the rotary communication device through the groove.
6. A rotary communication device based on magnetic field coupling according to claim 2, characterized in that the stator sleeve (15) has a through hole through which the first outer loop coil (5-1) and the second outer loop coil (5-2) lead the leads to the outside of the rotary communication device.
7. The rotary magnetic field coupling-based communication device according to claim 5, wherein: the wire outlets of the first inner ring coil (4-1) and the second inner ring coil (4-2) form 180 degrees.
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| CN201611105179.2A CN106788611B (en) | 2016-12-05 | 2016-12-05 | Rotary communication device based on magnetic field coupling |
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| CN201611105179.2A CN106788611B (en) | 2016-12-05 | 2016-12-05 | Rotary communication device based on magnetic field coupling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108305455A (en) * | 2018-01-08 | 2018-07-20 | 深圳市杉川机器人有限公司 | Rotating platform and rotating radar platform |
| CN108429571B (en) * | 2018-03-12 | 2019-10-22 | 深圳市杉川机器人有限公司 | A kind of rotating device and rotating radar device |
| CN109116330A (en) * | 2018-10-30 | 2019-01-01 | 深圳市速腾聚创科技有限公司 | A kind of radar system |
| CN110289698B (en) * | 2019-07-05 | 2023-09-22 | 同济大学 | Wireless power transmission system based on three resonance coils and transmission method thereof |
| CN111585357B (en) * | 2020-06-12 | 2021-11-09 | 中国电子科技集团公司第三十六研究所 | Rotatory conducting ring of induction type via hole |
| CN115144114A (en) * | 2022-06-29 | 2022-10-04 | 广东高标电子科技有限公司 | Rotator data detection device |
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