Magnetic sensing device and motor

Abstract

The utility model discloses a magnetic sensing device and a motor, and the magnetic sensing device is used for collecting the position information of a rotating shaft of the motor, and comprises a magnetic part and a magnetic sensing module. The magnetic part comprises two magnetic blocks, the polarities of the two magnetic blocks are N pole and S pole which are uniformly distributed, and one side of the magnetic part is used for being concentrically connected with a rotating shaft of the motor; the magnetic sensing modules are arranged on the other side of the magnetic part at intervals, the motor rotates to drive the magnetic part to rotate, and the magnetic sensing modules sense magnetic field changes of the N pole and the S pole and output position information after the magnetic part moves. The magnetic sensing device provided by the utility model is not influenced by external light, so that a shading structure and a grating sheet are not needed, and the structure is simplified. Meanwhile, the magnetic part and the magnetic sensing module can be arranged on the outer side of the motor shell, and only the magnetic part and the rotating shaft need to be concentrically connected, so that the internal space of the motor is greatly saved, and the assembling convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular to a magnetic sensor device and a motor. Background Art

[0002] Motors are often used in various mechanical fields to achieve the driving operation of mechanical structures. During the rotation of the motor, such as a lifting motor, it is necessary to collect the angle information of the motor rotation to accurately obtain the movement position of the mechanical structure, or such as a brushless DC motor, it is necessary to obtain the rotation angle and rotation position of the rotor in order to accurately energize the stator winding and realize electronic commutation.

[0003] In the prior art, a grating is set on the output shaft of the motor. The grating rotates with the output shaft of the motor and provides a light deformation signal to the photoelectric sensor. The photoelectric sensor converts the light deformation signal into an electrical signal and transmits it to the host computer through a signal transmission module to locate the rotation position of the motor. However, this photoelectric conversion motor using a grating also requires a photoelectric sensor, a mounting bracket, a light shielding structure, etc. Since the grating is expensive and has high protection requirements, the overall structure and assembly of the motor are relatively complex, and the production cost is high. Utility Model Content

[0004] The main purpose of the utility model is to provide a magnetic sensor device, aiming to solve the problems of the existing photoelectric induction motor having a relatively complex structure and assembly and a high production cost of the motor.

[0005] To achieve the above-mentioned purpose, the magnetic sensing device proposed in the utility model is applied to a motor, and the magnetic sensing device includes a magnetic part and a magnetic sensing module. The magnetic part includes two connected magnetic blocks, and the polarities of the two magnetic blocks are an N pole and an S pole, respectively. The N pole and the S pole are evenly distributed. One side of the magnetic part is used to concentrically connect to the rotating shaft of the motor so as to move with the rotating shaft of the motor; the magnetic sensing module is spaced apart from the magnetic part, and the magnetic sensing module senses the magnetic field component of the magnetic part and outputs a pulse signal to a host computer to obtain the position information of the magnetic part and the rotating shaft.

[0006] In one embodiment of the utility model, the magnetic sensing module includes a circuit board, and a sensor chip and a signal output port arranged on the circuit board; the sensor chip and the signal output port are electrically connected through the circuit board, the sensor chip is arranged on the side of the circuit board facing the magnetic component, and the signal output port is arranged on the side of the circuit board away from the magnetic component. The sensor chip is used to sense magnetic field components and output pulse signals to a host computer through the signal output port to obtain position information of the magnetic component and the rotating shaft.

[0007] In one embodiment of the present invention, the central axis of the sensor chip and the central axis of the magnetic member are offset, and the distance of the deviation between the central axes of the two is less than or equal to 0.3 mm;

[0008] And / or, the distance between the sensor chip and the magnetic element is 0.5-2 mm.

[0009] In an embodiment of the present invention, the two magnetic blocks are of the same size and have a semicircular cross-sectional shape, and the two magnetic blocks are adjacently arranged along a direction parallel to the sensor chip.

[0010] In one embodiment of the present invention, the magnetic sensor device further comprises a magnetic bead seat, the material of the magnetic bead seat is plastic, an installation groove is formed at one end of the magnetic bead seat facing the magnetic sensor module, and the magnetic component is installed in the installation groove.

[0011] In one embodiment of the utility model, a connecting groove is provided at one end of the magnetic bead seat toward the rotating shaft, the groove wall of the connecting groove is at least partially flat, the shape of the connecting groove is adapted to the shape of the rotating shaft, and the connecting groove is used to insert the rotating shaft.

[0012] In one embodiment of the utility model, the magnetic sensing device also includes a fixing frame, one end of the fixing frame is connected to the circuit board, and the other end is used to be installed on the end surface of the motor, the fixing frame cover is arranged on the outside of the magnetic component, and the magnetic component is spaced apart from the inner wall of the fixing frame.

[0013] In one embodiment of the present invention, the cross-sectional shape of the fixing frame is annular;

[0014] And / or, an avoidance gap is formed on the same side of the fixing frame and the circuit board.

[0015] The utility model also proposes a motor, which includes a housing, a stator, a rotating shaft and a magnetic sensing device as described above; the stator is arranged on the inner wall of the housing, the rotating shaft is rotatably arranged in the housing, the rotating shaft is connected to the magnetic part, and the magnetic sensing module is connected to the housing.

[0016] In one embodiment of the utility model, one end of the housing is a mounting end, one end of the rotating shaft extends out of the mounting end and is connected to the magnetic component, and the magnetic sensor module is arranged on the outside of the housing and is connected to the end surface of the mounting end.

[0017] The magnetic sensing device proposed in the technical solution of the utility model includes a magnetic part and a magnetic sensing module, wherein the magnetic part includes two magnetic blocks with N poles and S poles evenly distributed, the motor shaft and one side of the magnetic part are concentrically connected, and the magnetic sensing module is spaced apart and arranged on the other side of the magnetic part. When the shaft rotates or moves along the axial direction of the shaft, the magnetic part is driven to move. At this time, the magnetic sensing module collects the changes in the magnetic field components of the N pole and the S pole of the magnetic part and converts them into pulse signals. The position information of the magnetic part after movement can be obtained through the pulse signal, such as the rotation angle of the magnetic part and the moving distance of the magnetic part toward the magnetic sensing module, and then the rotation angle and moving distance of the motor shaft can be obtained. Since the magnetic sensing module is not affected by external light, it does not require a shading structure or a grating sheet, which simplifies the structure. At the same time, compared with the grating sheets that are more expensive and require regular maintenance, the magnetic sensing module can greatly reduce the production cost. In addition, different specifications of grating sheets are required to meet different acquisition accuracy requirements, and the use of magnetic sensor modules can meet different accuracy requirements by adjusting the number of pulse signals collected by each rotation of the magnetic part, thus greatly improving the versatility of the motor. At the same time, the magnetic part and the magnetic sensor module can be set on the outside of the motor housing to save space inside the motor and improve the convenience of assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of a motor of the utility model;

[0020] Figure 2 It is an exploded diagram of the motor of the utility model;

[0021] Figure 3 for Figure 1 Top view of the motor;

[0022] Figure 4 for Figure 3 Section view along AA;

[0023] Figure 5 This is a schematic structural diagram of an embodiment of a magnetic sensor device of the utility model;

[0024] Figure 6 It is a structural schematic diagram of a magnetic sensing module in the magnetic sensing device of the utility model;

[0025] Figure 7 It is a structural schematic diagram of a magnetic bead seat in the magnetic sensing device of the utility model.

[0026] Description of Figure Numbers:

[0027]

[0028]

[0029] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. The meanings of "and / or" and "and / or" appearing in the full text are the same, both indicating that three parallel solutions are included. Taking "A and / or B as an example", it includes solution A, or solution B, or a solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0034] The utility model provides a magnetic sensor device, which is applied to a motor 1 .

[0035] Combination Figure 5 As shown, in one embodiment of the utility model, the magnetic sensing device includes a magnetic component 10 and a magnetic sensing module 20, the magnetic component 10 includes two connected magnetic blocks 11, the polarities of the two magnetic blocks 11 are respectively N pole and S pole, the N pole and the S pole are evenly distributed, one side of the magnetic component 10 is used to concentrically connect to the rotating shaft 60 of the motor 1 to move with the rotating shaft 60 of the motor 1; the magnetic sensing module 20 is spaced apart from the magnetic component 10, the magnetic sensing module 20 senses the magnetic field component of the magnetic component 10, and outputs a pulse signal to the host computer to obtain the position information of the magnetic component 10 and the rotating shaft 60.

[0036] In the present embodiment, the magnetic part 10 is a component such as a magnet, a magnetic bead, a magnetic core, etc., which includes two polarities, an N pole and an S pole, and the N pole and the S pole are evenly arranged so that the magnetic field forms a uniform magnetic field loop between the N pole and the S pole. When the rotating shaft 60 of the motor 1 rotates, the magnetic part 10 will be driven to rotate, and the magnetic flux lines on the periphery of the magnetic part 10 will also rotate with the rotation of the magnetic part 10. The magnetic sensor module 20 arranged on one side of the magnetic part 10 is based on the Hall magnetic induction principle, which can sense the magnetic field components of the magnetic part 10 on the X-axis and Y-axis, and output a voltage pulse signal, and then amplify the pulse signal through the amplifier circuit and transmit it to the host computer, and the host computer converts the pulse signal into coordinate information, thereby obtaining the rotation angle of the magnetic part 10 and the rotating shaft 60. Therefore, the magnetic sensor device can be applied to the motor 1 for rotation angle positioning and speed feedback to achieve accurate positioning of the motor 1. When the shaft 60 of the motor 1 moves axially, the magnetic inductance intensity emitted by the magnetic component 10 received by the magnetic sensor module 20 gradually increases, and the moving distance of the shaft 60 can be obtained through the change of the magnetic field intensity. Therefore, the magnetic sensor device can be applied to the lathe motor 1 to accurately realize the turning of the workpiece.

[0037] Compared with the existing scheme of using photoelectric sensors to locate the rotation position of the rotating shaft 60, the magnetic sensor module 20 and the magnetic member 10 used in this application have lower production costs and a wider range of applications, and can adjust the output signal in the range of 1-1204 pulses / turn according to customer needs. Therefore, compared with the technical solution of changing the specifications of the grating sheet, this application can reduce the workflow of replacing the sensor, greatly reduce the structural cost and improve the collection efficiency. At the same time, the magnetic sensor module 20 is less affected by environmental factors, has higher stability, can reduce the use of shading structures, further reduce the structural volume, and improve the convenience of assembly.

[0038] Combination Figure 5 and Figure 6 As shown, in one embodiment of the utility model, the magnetic sensing module 20 includes a circuit board 21, and a sensor chip 22 and a signal output port 23 arranged on the circuit board 21; the sensor chip 22 and the signal output port 23 are electrically connected through the circuit board 21, the sensor chip 22 is arranged on the side of the circuit board 21 facing the magnetic component 10, and the signal output port 23 is arranged on the side of the circuit board 21 away from the magnetic component 10, the sensor chip 22 is used to sense the magnetic field component, and output a pulse signal to the host computer through the signal output port 23 to obtain the position information of the magnetic component 10 and the rotating shaft 60.

[0039] In this embodiment, the sensor chip 22 is a sensor chip 22 based on the differential horizontal Hall magnetic induction principle. The sensor chip 22 contains two pairs of differential Hall Wheatstone bridges placed at 90 degrees to each other, which can sense the Z-axis magnetic field component of the magnetic part 10 rotating on the XY plane of the chip, and output two sinusoidal voltage pulse signals as the magnetic field angle changes. After the pulse signal is amplified, compensated and calculated by the circuit, the rotation angle value of the magnetic part 10 and the rotating shaft 60 is obtained. Similarly, the axial movement distance of the magnetic part 10 and the rotating shaft 60 can also be obtained according to the change in magnetic field intensity sensed by the sensor chip 22 when the magnetic part 10 moves toward the chip.

[0040] Furthermore, the signal output port 23 on the side of the circuit board 21 facing away from the magnetic part 10 is set as an incremental ABZ output interface. The signal output port 23 supports an incremental output mode of 1-1027 pulses / turn, so different numbers of pulses can be programmed according to the required acquisition accuracy of the rotating shaft 60, thereby improving the convenience of operation.

[0041] In addition, the sensor chip 22 also provides an incremental UVW signal output mode that replaces the switch Hall commutation. In the existing DC brushless motor 1, it generally includes a stator 70 winding and a rotor. In order to rotate the rotor, the stator 70 winding needs to be energized in sequence. A plurality of magnets are arranged on the outer periphery of the rotor, and three Hall sensors are arranged on the stator 70. The rotation of the rotor drives the magnets to rotate, and then the rotation position of the rotor is detected by the Hall sensor. Finally, according to the UVW signal collected by the Hall sensor, a specific stator 70 winding is accurately energized to rotate the motor 1. Therefore, in the DC brushless motor 1, the magnetic sensor module 20 can collect the rotation angle of the magnetic part 10 with the rotating shaft 60, output the UVW signal, and the multiple Hall sensors arranged inside the DC brushless motor 1 can be eliminated, which greatly saves the internal space of the motor 1.

[0042] Combination Figure 5 As shown, in one embodiment of the present invention, the central axis of the sensor chip 22 is offset from the central axis of the magnetic member 10, and the distance of the deviation between the central axes of the two is less than or equal to 0.3 mm;

[0043] And / or, the distance between the sensor chip 22 and the magnetic element 10 is 0.5-2 mm.

[0044] In this embodiment, the geometric center of the sensor chip 22 is the induction center of magnetic induction, and the magnetic flux lines of the magnetic part 10 propagate from the N pole to the S pole. The central axis of the sensor chip 22 is designed to be offset from the central axis of the magnetic part 10, so that when the magnetic part 10 rotates, the magnetic field induced by the induction center of the sensor chip 22 changes more, and the magnetic flux lines are denser, thereby improving the sensitivity of the rotation angle calculation. At the same time, the deviation distance needs to be less than or equal to 0.3mm, so too large a deviation distance will lead to a decrease in the density of the magnetic flux lines, affecting the accuracy of the detection.

[0045] In the case of limiting or not limiting the central axis position of the sensor chip 22 and the magnetic part 10, the present application preferably sets the distance between the sensor chip 22 and the magnetic part 10 to be 0.5-2 mm. A distance that is too far will affect the magnetic field strength collected by the sensor chip 22 and affect the calculation of the motion information of the magnetic part 10 and the rotating shaft 60. When the magnetic part 10 is too close to the sensor chip 22, due to the influence of the assembly accuracy, when the magnetic part 10 moves, it is easy for the magnetic part 10 and the sensor chip 22 to collide.

[0046] Combination Figure 2 and Figure 5 As shown, in one embodiment of the present invention, the two magnetic blocks 11 are of the same size and have a semicircular cross-sectional shape. The two magnetic blocks 11 are adjacently arranged in a direction parallel to the sensor chip 22 .

[0047] In this embodiment, the two magnetic blocks 11 have the same specifications, the shape of the magnetic member 10 formed by the two magnetic blocks 11 is cylindrical, and the arrangement direction of the two magnetic blocks 11 is parallel to the surface of the sensor chip 22, so that the sensor chip 22 can better sense the magnetic flux lines of the magnetic member 10. At the same time, compared with the square or diamond-shaped magnetic member 10, the magnetic flux lines of the cylindrical magnetic member 10 are more regular and controllable, and in the process of 0-360 degree rotation, the rotation angle of the magnetic member 10 can be better obtained by calculating the magnetic field component.

[0048] In other embodiments, the surface of the sensor chip 22 can also be set in the radial direction toward the magnetic member 10, so that the arrangement direction of the two magnetic blocks 11 is perpendicular to the surface of the sensor chip 22. At this time, during the rotation of the magnetic member 10, the N pole or S pole of the magnetic member 10 alternately faces the surface of the sensor chip 22. The magnetic member 10 can also output the corresponding voltage pulse signal by sensing the magnetic field components on the X-axis and the Y-axis, and the coordinate information of the magnetic member 10 is calculated by the host computer. It can be understood that the present invention is not limited to setting the sensor chip 22 in the axial or radial direction of the magnetic member 10. As long as the rotation angle and moving distance of the magnetic member 10 and the rotating shaft 60 can be calculated by sensing the magnetic field components of the magnetic member 10, they all belong to the protection scope of this application.

[0049] Combination Figure 2 , Figure 4 and Figure 7 As shown, in one embodiment of the present invention, the magnetic sensor device further comprises a magnetic bead seat 30 made of plastic. An installation groove is provided at one end of the magnetic bead seat 30 facing the magnetic sensor module 20, and the magnetic member 10 is installed in the installation groove.

[0050] In this embodiment, the shape and size of the mounting groove are compatible with the magnetic part 10, and the magnetic bead seat 30 plays a role in fixing the magnetic part 10, improving the convenience of connecting the magnetic part 10 with the rotating shaft 60, and the stability of the magnetic part 10 during rotation. Furthermore, the material of the magnetic bead seat 30 is plastic, which will not affect the strength of the magnetic field and the distribution of the magnetic flux lines, thereby ensuring the detection accuracy of the rotation and movement position of the rotating shaft 60 by the magnetic sensor device. In addition, the material of the magnetic bead seat 30 is not limited to the plastic mentioned in this embodiment, and can also be ceramic, gel, austenitic stainless steel and other materials.

[0051] Combination Figure 7 As shown, in one embodiment of the utility model, a connecting groove 31 is opened at one end of the magnetic bead seat 30 facing the rotating shaft 60, and the groove wall of the connecting groove 31 is at least partially flat. The shape of the connecting groove 31 is adapted to the shape of the rotating shaft 60, and the connecting groove 31 is used to insert the rotating shaft 60.

[0052] In this embodiment, the connecting groove 31 is used to insert the rotating shaft 60, and the shape of the connecting groove 31 is designed so that at least part of the groove wall is a plane, for example, it can be a semicircular shape and a plane-connected shape, or it can be a square, diamond, etc. At the same time, the end of the rotating shaft 60 is adapted to the shape of the connecting groove 31. After the end of the rotating shaft 60 is inserted into the connecting groove 31, the designed plane plays a circumferential limiting role in the rotation of the rotating shaft 60, thereby avoiding the sliding of the rotating shaft 60 relative to the magnetic bead seat 30, thereby improving the stability of the connection between the magnetic bead seat 30 and the rotating shaft 60.

[0053] Combination Figure 1 , Figure 2 and Figure 4 As shown, in one embodiment of the utility model, the magnetic sensing device also includes a fixing frame 40, one end of the fixing frame 40 is connected to the circuit board 21, and the other end is used to be installed on the end surface of the motor 1, and the fixing frame 40 is covered on the outside of the magnetic component 10, and the magnetic component 10 and the inner wall of the fixing frame 40 are spaced apart.

[0054] In this embodiment, the fixing frame 40 serves to connect the circuit board 21 and the motor 1, and to protect the magnetic member 10. The circuit board 21 and the fixing frame 40 may be connected by threaded connection, welding, plug-in connection, etc. For example, a plurality of threaded connection holes with both ends through may be opened on the surface of the fixing frame 40, and screws may be passed through the ends of the circuit board 21, the fixing frame 40, and the motor 1 in sequence, so that the circuit board 21 is fixed to the end face of the motor 1 through the fixing frame 40. At the same time, the fixing frame 40 is covered on the outside of the magnetic member 10 and is spaced apart from the magnetic member 10, which protects the magnetic member 10 while ensuring the free movement of the magnetic member 10, and further improves the accuracy of the magnetic sensor device in detecting the position of the rotating shaft 60.

[0055] Combination Figure 2 As shown, in one embodiment of the present invention, the cross-sectional shape of the fixing frame 40 is annular;

[0056] And / or, the same side of the fixing frame 40 and the circuit board 21 are both provided with an avoidance gap 211 .

[0057] In this embodiment, since the cross-sectional shapes of the magnetic component 10 and the magnetic bead seat 30 are both circular, the cross-sectional shape of the fixing frame 40 is designed to be a circular ring, and the magnetic component 10 and the magnetic bead seat 30 are arranged inside the ring of the fixing frame 40, so as to better cooperate with the magnetic bead seat 30 and the magnetic component 10, thereby improving the aesthetics and compactness of the overall structure.

[0058] When the shape of the fixing bracket 40 is limited or not limited, since the motor 1 needs to be connected to three-phase electricity to provide power for the motor 1 to rotate, the three-phase electricity cable 90 of the motor 1 is arranged at the end of the motor 1 housing 50 away from the rotating gear 80, that is, at the end with the magnetic sensor device. Therefore, an avoidance gap 211 is opened on the same side of the fixing bracket 40 and the circuit board 21 to avoid the position of the three-phase cable 90.

[0059] Furthermore, since the circuit board 21 is installed on the fixing frame 40, the relative position accuracy of the sensor chip 22 and the magnetic component 10 provided on the circuit board 21 will affect the positioning accuracy of the magnetic sensor device on the rotating shaft 60. Therefore, a plurality of positioning grooves 212 are opened on the peripheral side of the circuit board 21, and a plurality of positioning pins 41 are protrudingly provided on the end surface of the fixing frame 40 facing the circuit board 21. By matching the positioning pins 41 with the positioning grooves 212, the position accuracy and assembly efficiency of the fixing frame 40 and the circuit board 21 are improved, thereby improving the assembly accuracy of the magnetic component 10 and the sensor chip 22.

[0060] Furthermore, a limiting groove is provided on the side of the fixing frame 40 away from the circuit board 21, and a limiting block 511 is convexly provided on the end face of the motor 1 housing 50. The limiting block 511 cooperates with the limiting groove so that the fixing frame 40 can be quickly and accurately installed on the end face of the housing 50, thereby further improving the assembly accuracy of the magnetic component 10 and the sensor chip 22.

[0061] The utility model also proposes a motor 1, which includes a housing 50, a stator 70, a rotating shaft 60 and a magnetic sensor device. The specific structure of the magnetic sensor device refers to the above embodiment. Since the motor 1 adopts all the technical solutions of all the embodiments of the above magnetic sensor device, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0062] Combination Figure 1-Figure 4 As shown, in one embodiment of the present invention, the stator 70 is disposed on the inner wall of the housing 50 , the shaft 60 is rotatably disposed in the housing 50 , the shaft 60 is connected to the magnetic member 10 , and the magnetic sensor module 20 is connected to the housing 50 .

[0063] In this embodiment, the magnetic sensing device can be used in a variety of different motors 1. The magnetic part 10 rotates or moves under the drive of the rotating shaft 60. The magnetic sensor module senses the change of the magnetic field component and then obtains the rotation angle or movement distance of the rotating shaft 60, so it can be used for angle feedback of the lifting motor 1, distance control of the turning machine, etc. At the same time, the user can program and change the resolution of the magnetic sensor module 20 according to actual needs, that is, the number of pulses output corresponding to one rotation of the magnetic part 10, so as to realize the position feedback of the rotating shaft 60 with high, medium and low precision, which improves the convenience of operation and the versatility for different application scenarios.

[0064] Please continue to refer to Figure 1-Figure 4 In one embodiment of the utility model, one end of the housing 50 is the mounting end 51, one end of the rotating shaft 60 extends out of the mounting end 51 and is connected to the magnetic component 10, and the magnetic sensor module 20 is arranged on the outside of the housing 50 and is connected to the end surface of the mounting end 51.

[0065] In this embodiment, both ends of the rotating shaft 60 extend out of the housing 50, wherein one end of the rotating shaft 60 extends out of the mounting end 51 and is connected to the magnetic member 10, and the other end extends out of an end opposite to the mounting end 51 and is used to connect to the gear 80, which is the power output end of the motor 1 to transmit the power of the motor 1 to other mechanical structures. By extending one end of the rotating shaft 60 out of the mounting end 51, the magnetic sensor device can be arranged outside the housing 50, thereby greatly saving the space inside the housing 50, simplifying the structure inside the housing 50, and improving the assembly efficiency of the motor 1.

[0066] In addition, the sensor chip 22 in the magnetic sensor module 20 can also output an incremental UVW signal for electronic commutation of the motor 1. By collecting and calculating the rotation angle of the shaft 60, the incremental UVW signal is output to the host computer. The host computer accurately energizes a specific stator 70 winding according to the rotation angle of the shaft 60 to control the rotation of the shaft 60. Therefore, compared with the traditional DC brushless motor 1, multiple Hall sensors set inside the motor 1 for electronic commutation are omitted, the overall volume of the motor 1 is reduced, the structure is simplified, and the production cost of the motor 1 is reduced, so that the motor 1 can be better applied to miniaturized demand scenarios.

[0067] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A magnetic sensor device, applied to a motor, characterized in that: The magnetic sensing device comprises: A magnetic member, the magnetic member comprising two connected magnetic blocks, the polarities of the two magnetic blocks are respectively an N pole and an S pole, the N pole and the S pole are evenly distributed, and one side of the magnetic member is used to be concentrically connected to the rotating shaft of the motor so as to move with the rotating shaft of the motor; and A magnetic sensor module is arranged at a distance from the magnetic component, and senses the magnetic field component of the magnetic component and outputs a pulse signal to a host computer to obtain position information of the magnetic component and the rotating shaft.

2. The magnetic sensor device according to claim 1, characterized in that: The magnetic sensing module includes a circuit board, and a sensor chip and a signal output port arranged on the circuit board; the sensor chip and the signal output port are electrically connected through the circuit board, the sensor chip is arranged on the side of the circuit board facing the magnetic component, and the signal output port is arranged on the side of the circuit board away from the magnetic component. The sensor chip is used to sense magnetic field components and output pulse signals to a host computer through the signal output port to obtain position information of the magnetic component and the rotating shaft.

3. The magnetic sensor device according to claim 2, characterized in that: The central axis of the sensor chip is offset from the central axis of the magnetic component, and the distance of the deviation between the central axes of the two is less than or equal to 0.3 mm; And / or, the distance between the sensor chip and the magnetic element is 0.5-2 mm.

4. The magnetic sensor device according to claim 3, characterized in that: The two magnetic blocks are of the same size and have a semicircular cross-sectional shape. The two magnetic blocks are adjacently arranged along a direction parallel to the sensor chip.

5. The magnetic sensor device according to any one of claims 1 to 4, characterized in that: The magnetic sensor device further comprises a magnetic bead seat, the material of the magnetic bead seat is plastic, an installation groove is formed at one end of the magnetic bead seat facing the magnetic sensor module, and the magnetic member is installed in the installation groove.

6. The magnetic sensor device according to claim 5, characterized in that: A connecting groove is formed at one end of the magnetic bead seat facing the rotating shaft, a groove wall of the connecting groove is at least partially plane, a shape of the connecting groove is adapted to a shape of the rotating shaft, and the connecting groove is used to insert the rotating shaft.

7. The magnetic sensor device according to any one of claims 2 to 4, characterized in that: The magnetic sensor device also includes a fixing frame, one end of which is connected to the circuit board, and the other end is used to be installed on the end surface of the motor. The fixing frame cover is arranged on the outside of the magnetic component, and the magnetic component is spaced apart from the inner wall of the fixing frame.

8. The magnetic sensor device according to claim 7, characterized in that: The cross-sectional shape of the fixing frame is annular; And / or, an avoidance gap is formed on the same side of the fixing frame and the circuit board.

9. A motor, characterized in that: It comprises a housing, a stator, a rotating shaft and a magnetic sensor device as claimed in any one of claims 1 to 8; The stator is arranged on the inner wall of the casing, the rotating shaft is rotatably arranged in the casing, the rotating shaft is connected to the magnetic component, and the magnetic sensor module is connected to the casing.

10. The motor according to claim 9, characterized in that One end of the housing is a mounting end, one end of the rotating shaft extends out of the mounting end and is connected to the magnetic component, and the magnetic sensor module is arranged outside the housing and is connected to the end surface of the mounting end.

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