CN114499060A - Magnetic encoder assembly and motor - Google Patents
Magnetic encoder assembly and motor Download PDFInfo
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- CN114499060A CN114499060A CN202111582793.9A CN202111582793A CN114499060A CN 114499060 A CN114499060 A CN 114499060A CN 202111582793 A CN202111582793 A CN 202111582793A CN 114499060 A CN114499060 A CN 114499060A
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- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229910000851 Alloy steel Inorganic materials 0.000 description 4
- 230000004308 accommodation Effects 0.000 description 4
- 229910001369 Brass Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 241000425571 Trepanes Species 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
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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
- G01D5/12—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 using electric or magnetic means
- G01D5/244—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 using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
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- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The application discloses magnetic encoder subassembly and motor relates to magnetic encoder device technical field. The magnetic encoder component comprises a motor rotating shaft, a magnetic head, a circuit board and a magnetic sensitive element; the motor rotating shaft comprises a rotating shaft section and an electromagnetic shielding shaft section; the electromagnetic shielding shaft section is welded at one end of the rotating shaft section in a rotating friction mode so that the electromagnetic shielding shaft section and the rotating shaft section are arranged coaxially; one end of the electromagnetic shielding shaft section, which is far away from the rotating shaft section, is provided with a magnetic head accommodating hole, and the magnetic head is arranged in the magnetic head accommodating hole; the circuit board is arranged on one side of the electromagnetic shielding shaft section, which is far away from the rotating shaft section, and is opposite to the magnetic head at intervals; the magnetic sensing element is arranged on the circuit board and used for sensing the rotation change of the magnetic field of the magnetic head so as to generate a corresponding sensing signal. This application enables magnetic head and motor shaft to have more excellent assembly accuracy.
Description
Technical Field
The application relates to the technical field of magnetic encoder devices, in particular to a magnetic encoder assembly and a motor.
Background
In order to improve the working accuracy of the motor, an encoder for selecting a station is often installed on the motor. When a magnetic head of the existing encoder is installed on a motor rotating shaft, the magnetic head bracket needs to be in clearance fit with the motor rotating shaft, and then the magnetic head bracket is abutted against the motor rotating shaft in the radial direction of the motor rotating shaft by utilizing a fastening screw.
Because the clearance fit of the existing magnetic head bracket and the motor rotating shaft, the assembly precision of the magnetic head and the motor rotating shaft is not high.
Disclosure of Invention
In view of the above, to solve the above technical problems, the present application provides a magnetic encoder assembly and a motor.
To achieve the above object, the present application provides a magnetic encoder assembly including a motor shaft, a magnetic head, a circuit board, and a magnetic sensor; wherein,
the motor rotating shaft comprises a rotating shaft section and an electromagnetic shielding shaft section; the electromagnetic shielding shaft section is welded at one end of the rotating shaft section in a rotating friction mode so that the electromagnetic shielding shaft section and the rotating shaft section are arranged coaxially; one end of the electromagnetic shielding shaft section, which is far away from the rotating shaft section, is provided with a magnetic head accommodating hole, and the magnetic head is arranged in the magnetic head accommodating hole; the circuit board is arranged on one side of the electromagnetic shielding shaft section, which is far away from the rotating shaft section, and is opposite to the magnetic head at intervals; the magnetic sensing element is arranged on the circuit board and used for sensing the rotation change of the magnetic field of the magnetic head so as to generate a corresponding sensing signal.
Furthermore, the magnetic head accommodating hole extends along the axial direction of the electromagnetic shielding shaft section and is connected with the end face of one end of the electromagnetic shielding shaft section, which is far away from the rotating shaft section;
the size of the magnetic head accommodating hole along the axial direction of the electromagnetic shielding shaft section is smaller than that of the electromagnetic shielding shaft section.
Furthermore, the magnetic encoder assembly comprises an electromagnetic shielding sleeve, the electromagnetic shielding sleeve is arranged on the periphery of the electromagnetic shielding shaft section, and the circuit board covers one side of the electromagnetic shielding sleeve, which is far away from the electromagnetic shielding shaft section relative to the magnetic head;
the magnetic sensitive element is arranged on one side of the circuit board close to the magnetic head.
Furthermore, the electromagnetic shielding sleeve is provided with a sleeve hole, and the electromagnetic shielding shaft section is arranged in the sleeve hole;
wherein, the electromagnetic shield cover includes the crown plate, and the crown plate sets up the inner wall of the trepanning of electromagnetic shield cover to radially extend in order to set up in the week side of electromagnetic shield shaft section along the electromagnetic shield shaft section.
Further, the magnetic encoder assembly comprises an output interface, and the output interface is arranged on one side of the circuit board far away from the magnetic head.
Furthermore, the magnetic encoder assembly comprises a motor rear end cover, the electromagnetic shielding shaft section penetrates through the motor rear end cover, and one end, close to the rotating shaft section, of the electromagnetic shielding sleeve is arranged on the motor rear end cover;
wherein, one end of the electromagnetic shielding sleeve close to the rear end cover of the motor is provided with a ring groove; the annular groove is communicated with the end face of one end of the electromagnetic shielding sleeve, which is close to the rear end cover of the motor; and a reinforcing rib is arranged between the inner ring wall and the outer ring wall of the ring groove.
Furthermore, the magnetic encoder assembly comprises a threaded fastener, and the electromagnetic shielding sleeve is provided with a first matching hole which penetrates through the reinforcing rib along the axial direction of the rotating shaft;
wherein, threaded fastener's one end passes first mating holes and with motor rear end cap threaded connection, threaded fastener's the other end support the pressure circuit board.
Furthermore, the end face of one end, close to the electromagnetic shielding sleeve, of the rear end cover of the motor is provided with a plurality of first limiting lugs around the electromagnetic shielding shaft section, and one side, away from the electromagnetic shielding shaft section, of the first limiting lugs is provided with a limiting face;
the inner wall of the sleeve hole of the electromagnetic shielding sleeve is matched with the limiting surface to limit the electromagnetic shielding sleeve to move relative to the motor rear end cover in the radial direction of the electromagnetic shielding shaft section.
Furthermore, one side of the electromagnetic shielding sleeve, which is close to the circuit board, is provided with a second limiting bump, the circuit board is provided with a second matching hole, and the second limiting bump is inserted into the second matching hole.
In order to solve the technical problem, another technical solution adopted by the present application is to provide a motor including any one of the above magnetic encoder assemblies.
Has the advantages that: be different from prior art, this application welds in the one end of pivot section through electromagnetic shield shaft section spin friction, so that electromagnetic shield shaft section and the coaxial setting of pivot section, thereby can improve the axiality between electromagnetic shield shaft section and the pivot section, on this basis, the one end that the electromagnetic shield shaft section deviates from the pivot section is provided with the magnetic head accommodation hole, the magnetic head sets up in the magnetic head accommodation hole, thereby make and set up and to have more good axiality between the magnetic head of magnetic head accommodation hole and pivot section, magnetic head and motor shaft both have more good assembly precision promptly.
Drawings
FIG. 1 is a schematic structural diagram of one embodiment of a magnetic encoder assembly of the present application;
FIG. 2 is an exploded schematic view of a partially assembled structure of the magnetic encoder assembly of FIG. 1;
FIG. 3 is an exploded schematic view of the motor shaft and magnetic head of the magnetic encoder assembly of FIG. 1;
FIG. 4 is a schematic diagram of the structure of the circuit board of FIG. 1 on the side near the magnetic head;
FIG. 5 is a schematic view of the electromagnetic shielding sleeve of FIG. 1 on a side thereof adjacent to the shaft section;
FIG. 6 is a schematic structural view of the electromagnetic shielding sleeve of FIG. 1 on a side away from the shaft section;
FIG. 7 is a schematic structural diagram of a rear end cover of the motor in FIG. 1 near one side of an electromagnetic shielding sleeve;
FIG. 8 is a schematic structural diagram of an embodiment of the electric machine of the present application;
fig. 9 is a schematic flow chart of an embodiment of a method for manufacturing a motor shaft according to the present application.
Detailed Description
In order to make the technical solutions of the present application better understood by those skilled in the art, the present application is described in further detail below with reference to the accompanying drawings and the detailed description. It is to be understood that the described embodiments are merely some embodiments of the present application and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any creative effort based on the embodiments in the present application belong to the protection scope of the present application.
Referring to FIGS. 1-4, FIG. 1 is a schematic structural diagram of one embodiment of a magnetic encoder assembly of the present application; FIG. 2 is an exploded schematic view of a partially assembled structure of the magnetic encoder assembly of FIG. 1; FIG. 3 is an exploded schematic view of the motor shaft and magnetic head of the magnetic encoder assembly of FIG. 1; FIG. 4 is a schematic diagram of the structure of the circuit board of FIG. 1 on the side near the magnetic head.
As shown in fig. 1-4, magnetic encoder assembly 10 may include a motor shaft 100, a magnetic head 200, a circuit board 300, and a magnetic sensing element 400.
The motor shaft 100 includes a shaft section 110 and an electromagnetic shielding shaft section 120; the electromagnetic shielding shaft segment 120 is friction-welded to one end of the shaft segment 110, so that the electromagnetic shielding shaft segment 120 and the shaft segment 110 are coaxially disposed. One end of the electromagnetic shielding shaft segment 120, which faces away from the rotating shaft segment 110, is provided with a head accommodating hole 121, and the magnetic head 200 is arranged in the head accommodating hole 121, so that magnetic leakage of the magnetic head 200 can be avoided or reduced through the electromagnetic shielding shaft segment 120. The circuit board 300 is disposed opposite to the magnetic head 200 at a distance on a side of the electromagnetic shielding shaft section 120 away from the rotating shaft section 110, and the magnetic sensing element 400 is disposed on the circuit board 300 for sensing a rotation change of a magnetic field of the magnetic head 200 to generate a corresponding sensing signal.
In this embodiment, the electromagnetic shielding shaft 120 is friction-welded to one end of the shaft 110, so that the electromagnetic shielding shaft 120 and the shaft 110 are coaxially disposed, and thus the coaxiality between the electromagnetic shielding shaft 120 and the shaft 110 can be improved, on this basis, one end of the electromagnetic shielding shaft 120, which is away from the shaft 110, is provided with a magnetic head accommodating hole 121, and the magnetic head 200 is disposed in the magnetic head accommodating hole 121, so that the magnetic head 200 disposed in the magnetic head accommodating hole 121 and the shaft 110 can have better coaxiality, that is, the magnetic head 200 and the motor shaft 100 both have better assembly accuracy.
In addition, compared with the prior art that the magnetic head bracket needs to be in clearance fit with the motor rotating shaft, and the magnetic head bracket is abutted against the motor rotating shaft by the fastening screw in the radial direction of the motor rotating shaft, in the magnetic encoder assembly 10 of the embodiment, the electromagnetic shielding shaft section 120 and the rotating shaft section 110 for installing the magnetic head 200 not only can have higher coaxiality, but also can reduce the processing procedures, and reduce the material accessories (for example, reducing the fastening screw in the radial direction of the motor rotating shaft and abutting the magnetic head bracket against the motor rotating shaft in the prior art), and also avoid the accumulated error caused by the clearance fit of the magnetic head bracket and the motor rotating shaft in the prior art, thereby reducing the fit error.
In one embodiment, the material of the shaft segment 110 may be structural alloy steel, for example, the material of the shaft segment 110 may be structural 40Cr structural alloy steel; the material of the electromagnetically shielded shaft segment 120 may be one of stainless steel or silicon brass.
In one embodiment, the magnetic sensing element 400 may be a magnetoresistive element or a hall element. The circuit board 300 may be provided with a signal processing circuit (not shown) for processing the sensing signal of the magnetic sensing element 400 and feeding back the processed sensing signal to the driver. The signal processing circuit may include an amplifying circuit, an analog-to-digital conversion circuit, and other circuits.
As shown in fig. 3, the head accommodation hole 121 extends in the axial direction of the electromagnetic shield shaft section 120 and connects an end face of the electromagnetic shield shaft section 120 facing away from one end of the spindle section 110; wherein, the dimension of the head accommodating hole 121 along the axial direction of the electromagnetic shielding shaft segment 120 is smaller than the axial dimension of the electromagnetic shielding shaft segment 120. Thus, the magnetic head 200 can be prevented from leaking at the side of the magnetic head accommodating hole 121 close to the shaft segment 110 by the remaining part of the electromagnetic shielding shaft segment 120 at the side of the magnetic head accommodating hole 121 close to the shaft segment 110, and can shield the external magnetic field signal.
Further, as shown in fig. 1-2, the magnetic encoder assembly 10 includes an electromagnetic shielding sleeve 500, the electromagnetic shielding sleeve 500 is disposed at the periphery of the electromagnetic shielding shaft section 120, and the circuit board 300 covers a side of the electromagnetic shielding sleeve 500 away from the electromagnetic shielding shaft section 120 relative to the magnetic head 200. The magnetic sensor 400 is disposed on the circuit board 300 near the magnetic head 200. In this way, the electromagnetic shielding shaft 120, the electromagnetic shielding sleeve 500 and the circuit board 300 cooperate with each other to shield the image of the external electromagnetic signal on the magnetic sensing element 400, and the concentration of the magnetic field of the magnetic head 200 at the position of the magnetic sensing element 400 can be improved.
Further, as shown in fig. 2 to 3, and fig. 5, the electromagnetic shielding sleeve 500 has a sleeve hole 501, and the electromagnetic shielding shaft section 120 is disposed in the sleeve hole 501; the electromagnetic shielding sleeve 500 includes a ring plate 510, and the ring plate 510 is disposed on an inner wall of the sleeve hole 501 of the electromagnetic shielding sleeve 500 and extends along a radial direction of the electromagnetic shielding shaft section 120 to be disposed on a peripheral side of the electromagnetic shielding shaft section 120.
In this way, the ring plate 510 disposed on the peripheral side of the electromagnetic shielding shaft segment 120 can cooperate with the electromagnetic shielding sleeve 500 together with the electromagnetic shielding shaft segment 120 to achieve the shielding effect on the external magnetic field signal, further avoid the magnetic leakage of the magnetic head 200, and improve the concentration strength of the magnetic field of the magnetic head 200 at the position of the magnetic sensing element 400.
Alternatively, as shown in FIG. 2, the magnetic encoder assembly 10 includes an output interface 600, the output interface 600 being disposed on a side of the circuit board 300 away from the magnetic head 200. Thus, a data cable (not shown) can be connected to the output interface 600 to output the sensing signal generated by the magnetic sensor 400 to a driver (not shown) through the data cable. The driver can conveniently calculate based on the induction signal and output a corresponding control signal to the motor so as to control the motor to work according to a preset operation mode. By the above manner, the output interface 600 is disposed on the side of the circuit board 300 away from the magnetic head 200, so that when the output interface 600 is externally connected with a data cable, the electromagnetic signal generated by the data cable can be reduced or prevented from affecting the induction of the magnetic sensing element 400 to the rotation change of the magnetic field of the magnetic head 200.
Further, as shown in fig. 1 to 3, and fig. 5 and 7, the magnetic encoder assembly 10 includes a motor rear end cover 700, the electromagnetic shielding shaft segment 120 is disposed through the motor rear end cover 700, and one end of the electromagnetic shielding sleeve 500 close to the rotating shaft segment 110 is disposed on the motor rear end cover 700.
Wherein, one end of the electromagnetic shielding sleeve 500 close to the motor rear end cover 700 is provided with a ring groove 502; the annular groove 502 is communicated with the end face of the electromagnetic shielding sleeve 500 close to one end of the motor rear end cover 700 and is spaced from the trepan boring 501; a rib 520 is disposed between the inner and outer annular walls of the ring groove 502.
Through the above manner, the annular groove 502 is arranged at one end of the electromagnetic shielding sleeve 500 close to the motor rear end cover 700, and the reinforcing ribs 520 are arranged between the inner annular wall and the outer annular wall of the annular groove 502, so that the deformation resistance of the electromagnetic shielding sleeve 500 can be increased.
Further, the magnetic encoder assembly 10 includes a threaded fastener 800, and the electromagnetic shielding sleeve 500 is provided with a first fitting hole 503 penetrating the reinforcing rib 520 in the axial direction of the motor rotation shaft 100; one end of the threaded fastener 800 passes through the first mating hole 503 and is in threaded connection with the motor rear end cover 700, and the other end of the threaded fastener 800 abuts against the circuit board 300.
By the above way, the first fitting hole 503 is disposed on the rib 520, so that the ability of the electromagnetic shielding sleeve 500 to resist deformation can be well maintained, and the requirement of parallelism between the magnetic head 200 and the magnetic sensing element 400 can be maintained.
The threaded fastener 800 may be a bolt, screw, or other threaded fastener, among others.
Alternatively, referring to fig. 1 to 3, and fig. 7, fig. 7 is a schematic structural view of a side of the rear end cover of the motor in fig. 1, which is close to the electromagnetic shielding sleeve.
The end face of the motor rear end cover 700 close to one end of the electromagnetic shielding sleeve 500 is provided with a plurality of first limiting convex blocks 710 surrounding the electromagnetic shielding shaft section 120, and one side of the first limiting convex blocks 710 departing from the electromagnetic shielding shaft section 120 is provided with a limiting face 711; wherein, the inner wall of the sleeve hole 501 of the electromagnetic shielding sleeve 500 is matched with the limiting surface 711 to limit the movement of the electromagnetic shielding sleeve 500 relative to the motor rear end cover 700 in the radial direction of the electromagnetic shielding shaft section 120.
Through the above manner, the limiting surfaces 711 on the first limiting convex blocks 710 are matched with the inner wall of the electromagnetic shielding sleeve 500, so that the stability of the assembly structure of the electromagnetic shielding sleeve 500 and the motor rear end cover 700 can be improved, the electromagnetic shielding sleeve 500 can be positioned in an auxiliary manner in the process of assembling the electromagnetic shielding sleeve 500, the first matching holes 503 can be conveniently aligned with corresponding threaded holes (not shown) in the motor rear end cover 700, and the assembly of the threaded fastener 800 is facilitated.
Alternatively, as shown in fig. 4 and 6, a second limit bump 530 is disposed on a side of the electromagnetic shielding sleeve 500 close to the circuit board 300, the circuit board 300 is provided with a second fitting hole 301, and the second limit bump 530 is inserted into the second fitting hole 301. Thus, the circuit board 300 can be further fixed by inserting the second limiting protrusion 530 into the second fitting hole 301, so as to prevent the circuit board 300 from loosening.
Referring to fig. 8, fig. 8 is a schematic structural diagram of an embodiment of the motor of the present application.
As shown in fig. 8, the motor 1 may include a motor body 20 and a magnetic encoder assembly 10. The magnetic encoder assembly 10 includes a motor shaft 100, a magnetic head 200, a circuit board 300, and a magnetic sensor 400.
The motor shaft 100 includes a shaft section 110 and an electromagnetic shielding shaft section 120; the electromagnetic shielding shaft segment 120 is friction-welded to one end of the shaft segment 110, so that the electromagnetic shielding shaft segment 120 and the shaft segment 110 are coaxially disposed. The shaft segment 110 can be rotatably disposed through the motor body 20, the motor body 20 can rotate the shaft segment 110, and the electromagnetic shielding shaft segment 120 can rotate together with the shaft segment 110. The end of the electromagnetic shielding shaft segment 120 away from the rotating shaft segment 110 is provided with a head accommodating hole 121, and the magnetic head 200 is disposed in the head accommodating hole 121. The circuit board 300 is disposed opposite to the magnetic head 200 at a distance on a side of the electromagnetic shielding shaft section 120 away from the rotating shaft section 110, and the magnetic sensing element 400 is disposed on the circuit board 300 for sensing a rotation change of a magnetic field of the magnetic head 200 to generate a corresponding sensing signal.
The magnetic encoder assembly 10 in the embodiment of the motor of the present application is the same as the magnetic encoder assembly 10 in the embodiment of the magnetic encoder assembly, and is not described herein again.
Referring to FIG. 9, FIG. 9 is a flow chart illustrating an embodiment of a method of making a magnetic encoder assembly.
As shown in fig. 9, the method for manufacturing a magnetic encoder assembly is used to manufacture the magnetic encoder assembly 10 of one embodiment of the magnetic encoder assembly, and includes steps S110 to S140.
Step S110: and providing a first shaft section corresponding to the rotating shaft section and providing a second shaft section corresponding to the electromagnetic shielding shaft section.
Wherein the material of the first shaft segment may be structural alloy steel, for example, the material of the rotating shaft segment 110 may be structural 40Cr structural alloy steel; the material of the second shaft section may be one of stainless steel or silicon brass.
Step S120: and butting one end of the first shaft section with one end of the second shaft section, and enabling the first shaft section and the second shaft section to rotate and rub, so that the first shaft section and the second shaft section are rotated and rubbed to be welded together to form the whole shaft.
Step S130: the whole shaft is machined to enable the first shaft section to form a rotating shaft section and the second shaft section to form an electromagnetic shielding shaft section, so that the whole shaft becomes a motor rotating shaft.
Compared with the prior art, the magnetic head bracket is in clearance fit with the motor rotating shaft through the magnetic head bracket, the magnetic head bracket is abutted to the motor rotating shaft in the radial direction of the motor rotating shaft through the fastening screw, the whole shaft can be processed in place in step S130 at one time, so that the electromagnetic shielding shaft section and the rotating shaft section for mounting the magnetic head are high in coaxiality, the processing procedures can be reduced, material accessories are reduced (for example, the fastening screw for abutting the magnetic head bracket to the motor rotating shaft in the radial direction of the motor rotating shaft in the prior art is reduced), the accumulated error caused by the clearance fit of the magnetic head bracket and the motor rotating shaft is avoided, and the fit error is reduced.
The shaft section and the electromagnetic shielding shaft section in the first embodiment of the manufacturing method of the magnetic encoder assembly are respectively the same as the shaft section 110 and the electromagnetic shielding shaft section 120 in the first embodiment of the magnetic encoder assembly, and are not described herein again.
Step S140: a magnetic head, a circuit board, and a magnetic sensor are provided, and a motor shaft, the magnetic head, the circuit board, and the magnetic sensor are assembled together to form a magnetic encoder assembly.
The circuit board is arranged on one side of the electromagnetic shielding shaft section, which is far away from the rotating shaft section, and is opposite to the magnetic head at intervals; the magnetic sensing element is arranged on the circuit board.
The motor shaft, the magnetic head, the circuit board and the magnetic sensing element in the first embodiment of the manufacturing method of the magnetic encoder assembly are respectively the same as the motor shaft 100, the magnetic head 200, the circuit board 300 and the magnetic sensing element 400 in the first embodiment of the magnetic encoder assembly, and are not described again here.
The above description is only an embodiment of the present application, and is not intended to limit the scope of the present application, and all equivalent structures or equivalent processes performed by the present application and the contents of the attached drawings, which are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (10)
1. A magnetic encoder assembly, comprising:
the motor rotating shaft comprises a rotating shaft section and an electromagnetic shielding shaft section; the electromagnetic shielding shaft section is welded at one end of the rotating shaft section in a rotating friction mode, so that the electromagnetic shielding shaft section and the rotating shaft section are coaxially arranged; one end of the electromagnetic shielding shaft section, which is far away from the rotating shaft section, is provided with a magnetic head accommodating hole,
a magnetic head disposed in the magnetic head accommodating hole;
the circuit board is arranged on one side, away from the rotating shaft section, of the electromagnetic shielding shaft section at intervals opposite to the magnetic head;
and the magnetic sensing element is arranged on the circuit board and used for sensing the rotation change of the magnetic field of the magnetic head so as to generate a corresponding sensing signal.
2. The magnetic encoder assembly of claim 1,
the magnetic head accommodating hole extends along the axial direction of the electromagnetic shielding shaft section and is communicated with the end face of one end of the electromagnetic shielding shaft section, which is far away from the rotating shaft section;
the size of the magnetic head accommodating hole along the axial direction of the electromagnetic shielding shaft section is smaller than the axial size of the electromagnetic shielding shaft section.
3. The magnetic encoder assembly of claim 1,
the magnetic encoder assembly comprises an electromagnetic shielding sleeve, the electromagnetic shielding sleeve is arranged on the periphery of the electromagnetic shielding shaft section, and the circuit board covers one side, far away from the electromagnetic shielding shaft section, of the electromagnetic shielding sleeve relative to the magnetic head;
the magnetic sensing element is arranged on one side of the circuit board close to the magnetic head.
4. The magnetic encoder assembly of claim 3, wherein the electromagnetic shielding sleeve has a sleeve bore, the electromagnetic shielding shaft segment being disposed in the sleeve bore;
wherein, the electromagnetic shield cover includes the crown plate, the crown plate sets up the inner wall of the trepanning of electromagnetic shield cover, and follow the radial extension of electromagnetic shield axial segment in order to set up in week side of electromagnetic shield axial segment.
5. The magnetic encoder assembly of any of claims 3-4, wherein the magnetic encoder assembly includes an output interface disposed on a side of the circuit board away from the magnetic head.
6. The magnetic encoder assembly of any of claims 3-4,
the magnetic encoder assembly comprises a motor rear end cover, the electromagnetic shielding shaft section penetrates through the motor rear end cover, and one end, close to the rotating shaft section, of the electromagnetic shielding sleeve is arranged on the motor rear end cover;
one end of the electromagnetic shielding sleeve, which is close to the rear end cover of the motor, is provided with a ring groove; the annular groove is communicated with the end face of one end, close to the rear end cover of the motor, of the electromagnetic shielding sleeve; and a reinforcing rib is arranged between the inner ring wall and the outer ring wall of the ring groove.
7. The magnetic encoder assembly of claim 6,
the magnetic encoder assembly comprises a threaded fastener, and the electromagnetic shielding sleeve is provided with a first matching hole which penetrates through the reinforcing rib along the axial direction of the rotating shaft;
one end of the threaded fastener penetrates through the first matching hole and is in threaded connection with the rear end cover of the motor, and the other end of the threaded fastener abuts against the circuit board.
8. The magnetic encoder assembly of claim 6,
the end face of one end, close to the electromagnetic shielding sleeve, of the rear end cover of the motor is provided with a plurality of first limiting lugs around the electromagnetic shielding shaft section, and one side, away from the electromagnetic shielding shaft section, of the first limiting lugs is provided with a limiting face;
the inner wall of the trepanning of the electromagnetic shielding sleeve is matched with the limiting surface to limit the electromagnetic shielding sleeve to move in the radial direction of the electromagnetic shielding shaft section relative to the motor rear end cover.
9. The magnetic encoder assembly of claim 7, wherein the electromagnetic shielding sleeve is provided with a second limiting protrusion on a side thereof close to the circuit board, the circuit board is provided with a second fitting hole, and the second limiting protrusion is inserted into the second fitting hole.
10. An electrical machine comprising a magnetic encoder assembly according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111582793.9A CN114499060B (en) | 2021-12-22 | 2021-12-22 | Magnetic encoder assembly and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111582793.9A CN114499060B (en) | 2021-12-22 | 2021-12-22 | Magnetic encoder assembly and motor |
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| Publication Number | Publication Date |
|---|---|
| CN114499060A true CN114499060A (en) | 2022-05-13 |
| CN114499060B CN114499060B (en) | 2024-06-04 |
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| CN202111582793.9A Active CN114499060B (en) | 2021-12-22 | 2021-12-22 | Magnetic encoder assembly and motor |
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| WO2020053992A1 (en) * | 2018-09-12 | 2020-03-19 | 三菱電機株式会社 | Encoder with magnetic-field-shielding plate |
| US20200182655A1 (en) * | 2018-12-10 | 2020-06-11 | Littelfuse, Inc. | Steering position rotary sensor assembly |
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|---|---|---|---|---|
| US20180010927A1 (en) * | 2015-01-28 | 2018-01-11 | Fraba B.V. | Magnet-based angular displacement measuring system |
| CN104807482A (en) * | 2015-04-29 | 2015-07-29 | 江苏亿嘉和信息科技有限公司 | Encoder for measuring steering angles of inspection robots and method for correcting errors of steering angles |
| JP2018042332A (en) * | 2016-09-06 | 2018-03-15 | 日本電産サンキョー株式会社 | motor |
| WO2020053992A1 (en) * | 2018-09-12 | 2020-03-19 | 三菱電機株式会社 | Encoder with magnetic-field-shielding plate |
| US20200182655A1 (en) * | 2018-12-10 | 2020-06-11 | Littelfuse, Inc. | Steering position rotary sensor assembly |
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| CN114499060B (en) | 2024-06-04 |
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