CN218120880U - Angle sensor structure with shaft end special-shaped structure beneficial to uniform and hollow magnetic field - Google Patents

Abstract

The utility model provides an angle sensor structure with a shaft end special-shaped structure beneficial to uniform and hollow magnetic field, belonging to the technical field of sensor devices; the novel multifunctional rotating shaft comprises a housing, one side fixedly connected with backplate of casing, the casing is close to one side fixedly connected with chipset of backplate, the casing is kept away from one side of backplate is rotated and has been cup jointed the pivot, the fixed cover has been cup jointed the magnetic steel piece in the pivot, the pivot is kept away from the first fixed block of one end fixedly connected with of casing. The utility model discloses a set up the first fixed block of rectangle, change the miscellaneous magnetic field trend, reduce the influence that the shape of sensor axle produced the work magnetic line of force, improve the performance of work magnet line through bonding small magnetic particle in the hole to a plurality of different axial of seting up on first fixed block, adjust the shimming performance of magnetic steel piece between the work interval, improve the interference killing feature of magnetic steel piece, increase angle sensor's precision level, obtain more ideal demarcation result.

Description

Angle sensor structure with shaft end special-shaped structure beneficial to uniform and hollow magnetic field

Technical Field

The utility model relates to a sensor technical field, in particular to axle head dysmorphism structure is favorable to the even hollow angle sensor structure in magnetic field.

Background

The standard working mode of the existing magnetic sensitive angle sensor is to install the angle sensor at the tail end of a rotating shaft to be measured, the shaft of the angle sensor and the shaft to be measured are concentrically fixed, the shaft to be measured synchronously rotates along with the rotation of the shaft to be measured, a magnetic material is fixed at one end of the shaft of the angle sensor corresponding to an angle measuring chip, the intensity of a magnetic field changes along with the rotation of the shaft, and the angle measuring chip converts the angle change into an electric signal through calculation and outputs the electric signal to an upper computer for calculation. The accuracy of the angle sensor depends on whether the variation of the magnetic field is completely due to the angle variation, and any factor that may affect the magnetic field variation may be calculated, thereby affecting the calculation result and the measurement accuracy of the angle sensor.

The magnetic material fixed on the angle sensor shaft is usually a disk-shaped magnet, the magnetic force lines generated by the magnetic material penetrate through the angle measuring chip, and the chip is converted into an electric signal according to the variation of the magnetic force lines and outputs the electric signal. The magnet of magnetic material receives the interference of external magnet great, there is soft magnetic material around, the magnetic line of force that motor and electric current that pass through produced all can bring the interference to the magnetic line of force that passes through the angle measuring chip, also can lead to the magnet surface to have the hot spot because of unknown reason in the magnet course of working, it is inhomogeneous to lead to the magnetic line of force, easily influence angle sensor's precision level, reduce the reliability of demarcation result, consequently, this application provides a shaft end special-shaped structure is favorable to the even hollow angle sensor structure in magnetic field to satisfy the demand.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a shaft end dysmorphism structure is favorable to the even hollow angle sensor structure in magnetic field all can bring the interference to the magnetic line of force that passes through the angle finding chip with the magnetic line of force that solves the motor and the electric current that passes through and produce, also can lead to the magnet surface to have the focus owing to unclear reason in the magnet course of working, and it is inhomogeneous to lead to the magnetic line of force, easily influences angle sensor's precision level, reduces the problem of the reliability of calibration result.

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model provides an axle head dysmorphism structure is favorable to even hollow angle sensor structure in magnetic field, which comprises a housin, one side fixedly connected with backplate of casing, the casing is close to one side fixedly connected with chipset of backplate, the casing is kept away from one side of backplate is rotated and has been cup jointed the pivot, the fixed magnetic steel piece that has cup jointed in the pivot, the pivot is kept away from the first fixed block of one end fixedly connected with of casing, first fixed block is the rectangle piece, first fixed block is kept away from square groove has been seted up to one side of pivot, one side inner wall of square groove has been seted up and has been run through the third spacing hole of pivot, set up the different hole of a plurality of axial on the first fixed block, the hole with square groove does not communicate with each other, the pivot is kept away from the third through groove has been seted up to one side of first fixed block, the pivot is kept away from one side fixedly connected with second baffle of first fixed block, the casing is kept away from one side fixedly connected with third spacing ring of backplate, first step groove has been seted up to the third spacing ring, first baffle in the first step inslot fixedly connected with first baffle, two second through grooves have been seted up on the first baffle, the casing is close to one side of backplate, first through groove is linked together with the first through groove.

Preferably, third grooves are formed in two sides of the second partition plate, and the third grooves penetrate through the second partition plate and are communicated with the third through-wire grooves.

Preferably, the rotating shaft and the second partition plate are both provided with second limiting holes, the second limiting holes in the rotating shaft are communicated with the third limiting holes, and the second limiting holes in the second partition plate penetrate through the second partition plate.

Preferably, the rotating shaft is close to one side of the shell and fixedly connected with two first limiting blocks, two first limiting holes are formed in the first partition plate, and the first limiting holes are in sliding sleeve connection with the first limiting blocks.

Preferably, a supporting table is fixedly connected to the middle of the first partition plate, a second positioning groove is formed in one side, close to the shell, of the second partition plate, the supporting table is matched with the second positioning groove, and a fourth groove is formed in the middle of the supporting table.

Preferably, one side of the shell is provided with a first limiting groove matched with the chip set, and the middle of the first limiting groove is provided with a first groove.

Preferably, one side of the shell, which is close to the back plate, is fixedly connected with a first positioning ring, and the first limiting groove is located in the first positioning ring.

Preferably, the backboard is provided with a first positioning groove matched with the first positioning ring, and the middle part of the first positioning groove is provided with a second groove matched with the chip set.

Preferably, the pivot is the step shaft, the pivot rotates to cup joint the bearing, there is first spacing ring in the pivot through threaded connection, first spacing ring with the bearing is contradicted, the bearing with the middle part terminal surface in first step groove is contradicted.

Preferably, the first stepped groove is connected with a second limit ring through threads, and the second limit ring is abutted against the bearing.

Compared with the prior art, the utility model, following beneficial effect has at least:

in the scheme, the direction of the stray magnetic field is changed by arranging the rectangular first fixed block, the influence of the shape of the sensor shaft on the working magnetic lines is reduced, in addition, in the working process of the sensor, the performance of the working magnetic lines can be improved by bonding tiny magnetic particles into a plurality of holes which are arranged on the first fixed block and have different axial directions, the shimming performance of the magnetic steel sheet in a working interval is adjusted, the anti-interference capability of the magnetic steel sheet is improved, the precision level of the angle sensor is increased, the product characteristics which cannot meet the precision requirement all the time originally can be improved by the method, the product qualification rate is improved, and an ideal calibration result is obtained.

Through setting up the first through-wire groove that is linked together, the second through-wire groove, the third through-wire groove, the cavity via hole design of sensor has been realized, satisfy the requirement that needs the wiring under the special circumstances, improve the comprehensive properties of product, compare simultaneously in cavity encoder or the resolver product on the current market, the volume of this device is less, can realize the assembly in narrow and small space, through setting up a supporting bench, first baffle is to the chipset, the magnetic steel piece separates, make circuit assembly district separate mutually with the magnetic steel piece, reduce the chipset, the mutual interference of magnetic steel piece, reduce the error influence that miscellaneous magnetic field caused, improve the detection accuracy of chipset.

Through setting up the first spacing hole that slides and cup joint with first stopper, make angle sensor can only be in free reciprocating rotation in the set stroke, make under the special demand, need through the first through-wire groove that is linked together, the second through-wire groove, when the third through-wire groove is laid wire, avoid because the pivot is rotatory to exceed the work interval, and then make and pass first through-wire groove, the second through-wire groove, the connecting wire of third through-wire groove is cracked under first baffle and second baffle shearing force effect, over-range work when avoiding abnormal operation, avoid because the mechanical damage that the maloperation brought, if rudder piece damage and connecting wire damage, under the guarantee special demand, the safety in utilization of connecting wire, improve the stability of demarcation work.

Drawings

The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the disclosure and, together with the description, further serve to explain the principles of the disclosure and to enable a person skilled in the pertinent art to make and use the disclosure.

FIG. 1 is a schematic view of a first perspective three-dimensional structure of an angle sensor structure with a shaft end special-shaped structure for facilitating uniform and hollow magnetic field;

FIG. 2 is a schematic view of a second perspective structure of an angle sensor structure with a shaft end special-shaped structure for facilitating uniform and hollow magnetic field;

FIG. 3 is a perspective view of a first perspective of a rotating shaft;

FIG. 4 is a perspective view of the second view angle of the rotating shaft;

FIG. 5 is a schematic view of a sectional enlarged perspective structure of the rotating shaft;

FIG. 6 is a schematic view of a partially sectioned enlarged three-dimensional structure of the first position-limiting ring, the second position-limiting ring, and the bearing assembly;

FIG. 7 is a first perspective enlarged view of the housing;

FIG. 8 is a schematic view of a second perspective enlarged structure of the housing;

FIG. 9 is a schematic sectional perspective view of the housing;

FIG. 10 is a schematic perspective view of a back plate;

fig. 11 is a schematic perspective view of a chip set.

[ reference numerals ]

1. A housing; 2. a back plate; 3. a rotating shaft; 4. a first limit ring; 5. a second stop collar; 6. a bearing; 7. a chipset; 8. a magnetic steel sheet; 9. a first limit groove; 10. a first positioning ring; 11. a first groove; 12. a first through-wire slot; 13. a third limit ring; 14. a first step groove; 15. a support table; 16. a first separator; 17. a first limit hole; 18. a second through-wire slot; 19. a first positioning groove; 20. a second groove; 21. a first stopper; 22. a third through wire slot; 23. a second separator; 24. a third groove; 25. a second limiting hole; 26. a first fixed block; 27. a square groove; 28. a third limiting hole; 29. a fourth groove; 30. a second positioning groove.

As shown, specific structures and devices are labeled in the drawings for the purpose of clearly realizing the structure of the embodiments of the present invention, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structures, devices and environments, and those skilled in the art can adjust or modify the devices and environments according to specific needs, and the adjustment or modification is still included in the scope of the appended claims.

Detailed Description

The following description is made in detail with reference to the accompanying drawings and specific embodiments, in which the shaft end special-shaped structure provided by the present invention is favorable for the uniform hollow angle sensor structure of the magnetic field. It is also to be noted that, in order to make the embodiments more detailed, the following embodiments are preferred and optimized, and other alternative implementations may be adopted by those skilled in the art; also, the accompanying drawings are included to describe embodiments in greater detail and are not intended to limit the invention in any way.

It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the relevant art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

In general, terms may be understood at least in part from the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in the singular or may be used to describe a combination of features, structures, or characteristics in the plural, depending, at least in part, on the context. Additionally, the term "based on" may be understood as not necessarily intended to convey an exclusive set of factors, but may instead allow for the presence of other factors not necessarily explicitly described, depending at least in part on the context.

As used herein, the term "nominal" refers to a desired or target value, and a range of values above and/or below the desired value, of a characteristic or parameter set during a design phase of a production or manufacturing process for a component or process operation. The range of values may be due to slight variations in manufacturing processes or tolerances. As used herein, the term "about" indicates a value of a given quantity that may vary based on the particular technology node associated with the subject semiconductor device. The term "about" may indicate a value of a given quantity that varies, for example, within 5% -15% (e.g., ± 5%, ± 10% or ± 15% of the value) based on the particular technology node.

It is understood that the meaning of "on 8230; \8230on", "on 82308230, 8230; \8230on" and "on 8230; \8230a top" in this disclosure should be interpreted in the broadest manner such that "on 8230; \8230on" means not only "directly on" something "but also on" something "with the meaning of intervening features or layers there between, and" on 8230; \8230on "or" on 8230, above "means not only the meaning of" on "or" above "something, but may also include the meaning of" on "or" above "something with no intervening features or layers there between.

Furthermore, spatially relative terms such as "below 823030; below", "lower", "above", "upper" and the like may be used herein for ease of description to describe one element or feature's relationship to another element or feature or features, as illustrated in the figures. Spatially relative terms are intended to encompass different orientations in use or operation of the device in addition to the orientation depicted in the figures. The device may be otherwise oriented and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1-5, shown in fig. 7, the embodiment of the utility model provides a shaft end dysmorphism structure is favorable to the even hollow angle sensor structure in magnetic field, including casing 1, one side fixedly connected with backplate 2 of casing 1, one side fixedly connected with chipset 7 that casing 1 is close to backplate 2, one side rotation that backplate 2 was kept away from to casing 1 has cup jointed pivot 3, magnetic steel sheet 8 has been cup jointed to pivot 3 internal fixation, casing 1's one end fixedly connected with first fixed block 26 is kept away from to pivot 3, first fixed block 26 is the rectangular block, square groove 27 has been seted up to one side that pivot 3 was kept away from to first fixed block 26, the third spacing hole 28 that runs through pivot 3 has been seted up to one side inner wall of square groove 27, the hole that has a plurality of axial differences has been seted up on first fixed block 26, the diameter of hole is not more than 3mm, hole and square groove 27 do not communicate with each other, third spacing ring 13 has been seted up to one side that first fixed block 26 has been kept away from to pivot 3, one side fixedly connected with first spacing groove 22 has been seted up to one side that first fixed block 26 of pivot 3, two first spacing plates have seted up about first through groove 18 and first through groove 12 has been linked together to one side of first through groove 12, casing 1 and two first through groove 16 have been seted up about first through groove 12.

The direction of the stray magnetic field is changed by arranging the special-shaped first fixed block 26, the influence of the shape of the sensor shaft on the working magnetic lines is reduced, in addition, in the working process of the sensor, the performance of the working magnetic lines is improved by bonding tiny magnetic particles into a plurality of holes in different axial directions, which are formed in the first fixed block 26, the shimming performance of the magnetic steel sheet 8 in a working area is adjusted, the anti-interference capability of the magnetic steel sheet 8 is improved, the precision level of the angle sensor is increased, the product characteristics which cannot meet the precision requirement all the time in the prior art can be improved by the method, the product qualification rate is improved, and an ideal calibration result is obtained.

Through setting up the first through-wire casing 12, second through-wire casing 18, the third through-wire casing 22 that are linked together, realized the cavity via hole design of sensor, satisfy the requirement that needs the wiring under the special circumstances, improve the comprehensive properties of product, compare in cavity encoder or the resolver product on the existing market simultaneously, the volume of this device is less, can realize the assembly in narrow and small space.

As shown in fig. 4 and 7, in the present embodiment, both sides of the second partition plate 23 are provided with third grooves 24, and the third grooves 24 penetrate through the second partition plate 23 and are communicated with the third through-line grooves 22; the rotating shaft 3 and the second partition plate 23 are both provided with a second limiting hole 25, the second limiting hole 25 on the rotating shaft 3 is communicated with a third limiting hole 28, and the second limiting hole 25 on the second partition plate 23 penetrates through the second partition plate 23; two first stopper 21 of one side fixedly connected with that pivot 3 is close to casing 1 have seted up two first spacing holes 17 on the first baffle 16, and first spacing hole 17 cup joints with first stopper 21 slides.

Through setting up the first spacing hole 17 that cup joints with first stopper 21 slip, make angle sensor can only freely reciprocating rotation in the set stroke, make under the special demand, need be through the first through-wire groove 12 that is linked together, second through-wire groove 18, when third through-wire groove 22 lays wire, avoid because pivot 3 is rotatory to exceed the work interval, and then make and pass first through-wire groove 12, second through-wire groove 18, the connecting wire of third through-wire groove 22 breaks under first baffle 16 and the effect of second baffle 23 shearing force, over-range work when avoiding abnormal operation, because the mechanical damage that avoids the maloperation and bring, if rudder piece damage and connecting wire damage, under the guarantee special demand, the safety in utilization of connecting wire, improve the stability of demarcation work.

As shown in fig. 4 and 7, in this embodiment, the supporting table 15 is fixedly connected to the middle of the first partition 16, a second positioning groove 30 is formed in one side of the second partition 23 close to the casing 1, the supporting table 15 is adapted to the second positioning groove 30, a fourth groove 29 is formed in the middle of the supporting table 15, and the fourth groove 29 is formed to avoid interference between the supporting table 15 and the magnetic steel sheet 8, which rotate relative to the second partition 23, and cause abrasion of the magnetic steel sheet 8, thereby affecting the service life of the magnetic steel sheet 8 and reducing the overall size of the device.

The support table 15 and the first partition plate 16 are arranged to separate the chip set 7 and the magnetic steel sheet 8, so that the circuit assembly area is separated from the magnet assembly area, the mutual interference of the chip set 7 and the magnetic steel sheet 8 is reduced, the error influence caused by a stray magnetic field is reduced, and the detection accuracy of the chip set 7 is improved.

As shown in fig. 8, in this embodiment, a first limiting groove 9 adapted to a chipset 7 is formed in one side of the housing 1, a first groove 11 is formed in the middle of the first limiting groove 9, the chipset 7 is limited by the first limiting groove 9, three first mounting holes are circumferentially arranged on the chipset 7, three first threaded holes are circumferentially arranged on the first limiting groove 9, the chipset 7 penetrates through the first mounting holes and is in threaded connection with the first threaded holes through bolts, the dismounting is convenient, and the occupied space of the device is reduced.

As shown in fig. 8 and 10, in this embodiment, a first positioning ring 10 is fixedly connected to one side of the housing 1 close to the back plate 2, and the first limiting groove 9 is located in the first positioning ring 10; set up the first constant head tank 19 with first constant head tank 10 looks adaptation on backplate 2, the second recess 20 with 7 looks adaptations of chipset is seted up at the middle part of first constant head tank 19, and the second mounting hole has all been seted up in the four corners of backplate 2, has seted up the second screw hole on the casing 1, and backplate 2 runs through second mounting hole and second screw hole threaded connection through the bolt, and the dismouting is convenient.

Through the first locating slot 19 and the second recess 20 that set up the looks adaptation, carry out the installation of fixing a position fast to backplate 2, further improve backplate 2's installation convenience, through the second recess 20 with chipset 7 looks adaptation, improve chipset 7's installation stability to reduce the space occupation volume of this device.

As shown in fig. 1, 2, and 6, in this embodiment, the rotating shaft 3 is a stepped shaft, the rotating shaft 3 is rotatably sleeved with a bearing 6, the rotating shaft 3 is connected with a first limiting ring 4 through a thread, the first limiting ring 4 abuts against the bearing 6, and the bearing 6 abuts against a middle end surface of the first stepped groove 14; the first stepped groove 14 is connected with a second limit ring 5 through threads, and the second limit ring 5 is abutted against the bearing 6.

Through setting up first spacing ring 4, second spacing ring 5, bearing 6, realize that pivot 3 cup joints with the rotation of third spacing ring 13, simple structure, the simple operation, it is convenient to maintain.

The utility model provides a technical scheme, through setting up special-shaped first fixed block, change the miscellaneous magnetic field trend, reduce the influence that the shape of sensor axle produced the work magnetic line of force, in sensor working process in addition, the accessible improves the performance of work magnet line to bonding small magnetic particle in the hole of a plurality of different axial of seting up on first fixed block, adjust the shimming performance of magnetic steel piece at the work interval, improve the interference killing feature of magnetic steel piece, increase angle sensor's precision level, can improve some original product characteristics that can't reach the required precision all the time through such method, improve the product percent of pass, with the calibration result who obtains more ideal.

Through setting up first through-wire groove, second through-wire groove, the third through-wire groove that is linked together, realized the cavity via hole design of sensor, satisfy the requirement that needs the wiring under the special circumstances, improve the comprehensive properties of product, compare in cavity encoder or the resolver product on the existing market simultaneously, the volume of this device is less, can realize the assembly in narrow and small space.

Through setting up the first spacing hole that slides and cup joint with first stopper, make angle sensor can only be in free reciprocating rotation in the set stroke, make under the special demand, need through the first through-wire groove that is linked together, the second through-wire groove, when the third through-wire groove is laid wire, avoid because the pivot is rotatory to exceed the work interval, and then make and pass first through-wire groove, the second through-wire groove, the connecting wire of third through-wire groove is cracked under first baffle and second baffle shearing force effect, over-range work when avoiding abnormal operation, avoid because the mechanical damage that the maloperation brought, if rudder piece damage and connecting wire damage, under the guarantee special demand, the safety in utilization of connecting wire, improve the stability of demarcation work.

The present invention covers any alternatives, modifications, equivalents, and alternatives falling within the spirit and scope of the present invention. In the following description of the preferred embodiments of the present invention, specific details are set forth in order to provide a thorough understanding of the present invention, and it will be apparent to those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, flows, components, circuits, and the like have not been described in detail as not to unnecessarily obscure aspects of the present invention.

Those skilled in the art will appreciate that all or part of the steps in the method for implementing the above embodiments may be implemented by relevant hardware instructed by a program, and the program may be stored in a computer readable storage medium, such as: ROM/RAM, magnetic disks, optical disks, etc.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the 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 utility model provides an axle head dysmorphism structure is favorable to the even hollow angle sensor structure in magnetic field which characterized in that includes:

the casing, one side fixedly connected with backplate of casing, the casing is close to one side fixedly connected with chipset of backplate, the casing is kept away from one side of backplate is rotated and has been cup jointed the pivot, the rigid coupling has the magnetic steel piece in the pivot, the pivot is kept away from the first fixed block of one end fixedly connected with of casing, first fixed block is the rectangular block, first fixed block is kept away from square groove has been seted up to one side of pivot, square groove's one side inner wall has been seted up and has been run through the third spacing hole of pivot, set up the different hole of a plurality of axial on the first fixed block, the hole with square groove does not communicate with each other, the pivot is kept away from third through groove has been seted up to one side of first fixed block, the pivot is kept away from one side fixedly connected with second baffle of first fixed block, the casing is kept away from one side fixedly connected with third spacing ring of backplate, first step groove has been seted up in the third spacing ring, first step inslot fixedly connected with first baffle, two second through grooves have been seted up on the first baffle, the casing is close to one side of backplate two first through grooves, first through groove with the second through groove be linked together.

2. The angle sensor structure with the special-shaped structure at the shaft end beneficial to uniformity and hollowness of a magnetic field according to claim 1, wherein third grooves are formed in two sides of the second partition plate, penetrate through the second partition plate and are communicated with the third through-wire grooves.

3. The angle sensor structure with the shaft end special-shaped structure beneficial to uniform and hollow magnetic field according to claim 1, wherein a second limiting hole is formed in each of the rotating shaft and the second partition plate, the second limiting hole in the rotating shaft is communicated with the third limiting hole, and the second limiting hole in the second partition plate penetrates through the second partition plate.

4. The angle sensor structure with the shaft end special-shaped structure beneficial to uniform and hollow magnetic field according to claim 1, wherein two first limiting blocks are fixedly connected to one side of the rotating shaft close to the housing, two first limiting holes are formed in the first partition plate, and the first limiting holes are in sliding sleeve connection with the first limiting blocks.

5. The angle sensor structure with the shaft end special-shaped structure beneficial to uniform and hollow magnetic field according to claim 1, wherein a supporting table is fixedly connected to the middle of the first partition plate, a second positioning groove is formed in one side, close to the shell, of the second partition plate, the supporting table is matched with the second positioning groove, and a fourth groove is formed in the middle of the supporting table.

6. The angle sensor structure with the shaft end special-shaped structure beneficial to uniformity and hollowness of a magnetic field according to claim 1, wherein a first limiting groove matched with the chip set is formed in one side of the shell, and a first groove is formed in the middle of the first limiting groove.

7. The angle sensor structure with the special-shaped structure at the shaft end beneficial to uniformity and hollowness of the magnetic field as claimed in claim 6, wherein a first positioning ring is fixedly connected to one side of the housing close to the back plate, and the first limiting groove is located in the first positioning ring.

8. The angle sensor structure with the shaft end special-shaped structure beneficial to uniformity and hollowness of a magnetic field according to claim 7, wherein a first positioning groove matched with the first positioning ring is formed in the back plate, and a second groove matched with the chip set is formed in the middle of the first positioning groove.

9. The angle sensor structure with the shaft end special-shaped structure beneficial to uniform and hollow magnetic field according to claim 1, wherein the rotating shaft is a stepped shaft, a bearing is rotatably sleeved on the rotating shaft, a first limiting ring is connected to the rotating shaft through threads, the first limiting ring is abutted against the bearing, and the bearing is abutted against the middle end face of the first stepped groove.

10. The angle sensor structure with the shaft end special-shaped structure beneficial to uniform and hollow magnetic field according to claim 9, wherein the first stepped groove is connected with a second limit ring through threads, and the second limit ring is abutted with the bearing.

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