Sensor mover assembly and linear transmission system

Abstract

The utility model discloses a sensor mover assembly and a linear transmission system, and relates to the technical field of conveying devices, the sensor mover assembly comprises a sensor mover housing and sensor mover magnetic steel; the sensor rotor shell is provided with a mounting groove; the sensor rotor magnetic steel is arranged in the mounting groove; wherein at least one end part of the sensor rotor magnetic steel is provided with a magnetic conduction structure, or the magnetizing mode of the magnetic steel at least one end part of the sensor rotor magnetic steel is a Halbach magnetic steel array structure. According to the technical scheme provided by the utility model, the problem that the detection precision of the sensor mover assembly is low when the two movers of the linear transmission system are close to each other can be solved, so that the detection and identification precision of the multiple movers is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to conveying device technical field, especially in a kind of sensor rotor subassembly and linear transmission system. BACKGROUND

[0002] Linear transmission system position detection usually uses magnetic sensor, and magnetic sensor mainly includes magnetic field generating device and sensor detection device, and magnetic field generating device is generally sensor rotor magnetic steel and its structural member, and sensor detection device includes detection chip and signal solution circuit.The output signal of detection chip under the action of different magnetic field has difference.In the movement of rotor, the magnetic field generated by sensor rotor magnetic steel can act on different detection chips, and the position information of sensor rotor magnetic steel can be obtained by solving the difference output signal of detection chip due to the different magnetic field action of different detection chips, and then the position of linear transmission system moving part can be solved.

[0003] However, when the magnetic field of sensor rotor magnetic steel attenuates to the magnetic field intensity that detection chip cannot effectively identify, certain distance requirement is needed, i.e.the detection chip outside the coverage area of sensor rotor magnetic steel can also be effectively identified, and position information is generated.When two adjacent moving parts of linear transmission system approach each other, the detection chip outside the coverage area of sensor rotor magnetic field can output effective position information, i.e.the detection chip between the two moving parts all outputs effective position information, leading to the inability to effectively identify and distinguish the two moving parts.

[0004] In related technology, the current common scheme is to increase the distance between two moving parts, so that the position information cannot be effectively identified by the detection chip between the two moving parts, and then different moving parts are distinguished. However, increasing the distance between two moving parts will limit the number of moving parts in linear transmission system, and reducing the distance between two moving parts will lead to low detection accuracy, and cannot realize the detection and identification of multiple rotors. UTILITY MODEL CONTENT

[0005] The main purpose of the utility model is to provide a kind of sensor rotor subassembly and linear transmission system, to solve the problem of low detection accuracy of sensor rotor subassembly when two rotors of linear transmission system approach each other.

[0006] To achieve the above-mentioned purpose, the utility model provides a kind of sensor rotor subassembly, comprising:

[0007] Sensor rotor shell, the sensor rotor shell is equipped with mounting groove;

[0008] Sensor rotor magnetic steel, the sensor rotor magnetic steel is located in the mounting groove;

[0009] The at least one end of the sensor rotor magnetic steel is provided with a magnetic conductive structure, or the magnetization mode of the at least one end magnetic steel of the sensor rotor magnetic steel is a Halbach magnetic steel array structure.

[0010] In an embodiment, both ends of the sensor rotor magnetic steel are provided with the magnetic conductive structure, or the magnetization mode of the magnetic steels at both ends of the sensor rotor magnetic steel is the Halbach magnetic steel array structure.

[0011] In an embodiment, the Halbach magnetic steel array structure includes at least three magnetic steels, the at least three magnetic steels are magnetized in different directions, a magnetic steel outputting a magnetic field outward in the Halbach magnetic steel array structure is defined as an output magnetic steel, and the magnetization direction of the output magnetic steel is toward the middle of the sensor rotor magnetic steel.

[0012] In an embodiment, the at least three magnetic steels include a first magnetic steel, a second magnetic steel, and a third magnetic steel.

[0013] The first magnetic steel is close to the middle of the sensor rotor magnetic steel, the second magnetic steel and the third magnetic steel are stacked at the end of the first magnetic steel, the magnetization direction of the first magnetic steel is opposite to that of the second magnetic steel, and the magnetization direction of the third magnetic steel is toward the first magnetic steel and the middle of the sensor rotor magnetic steel.

[0014] Alternatively, the first magnetic steel is close to the middle of the sensor rotor magnetic steel, the second magnetic steel is arranged at the end of the first magnetic steel, and the third magnetic steel is arranged at the end of the second magnetic steel, the magnetization direction of the first magnetic steel is opposite to that of the third magnetic steel, the magnetization direction of the first magnetic steel and the third magnetic steel are both toward the second magnetic steel, and the magnetization direction of the third magnetic steel is toward the middle of the sensor rotor magnetic steel.

[0015] In an embodiment, the first magnetic steel is close to the middle of the sensor rotor magnetic steel, the second magnetic steel is arranged at the end of the first magnetic steel, and the third magnetic steel is arranged at the end of the second magnetic steel, the magnetization direction of the first magnetic steel is toward the second magnetic steel.

[0016] The magnetization mode of the third magnetic steel is a composite Halbach magnetic steel array structure.

[0017] In an embodiment, the composite Halbach magnetic steel array structure includes at least two magnetic steels, the at least two magnetic steels are magnetized in different directions, a magnetic steel outputting a magnetic field outward in the composite Halbach magnetic steel array structure is defined as a composite output magnetic steel, and the magnetization direction of the composite output magnetic steel is toward the middle of the sensor rotor magnetic steel.

[0018] In an embodiment, the at least two magnetic steels include a fourth magnetic steel and a fifth magnetic steel.

[0019] The fourth magnetic steel and the fifth magnetic steel are stacked at the end of the second magnetic steel; the magnetization direction of the fourth magnetic steel is opposite to that of the second magnetic steel, and the magnetization direction of the fifth magnetic steel is towards the middle of the sensor mover magnetic steel.

[0020] In an embodiment, one side of the sensor mover shell is provided with a connecting lug, and the connecting lug is used for connecting a motor mover assembly.

[0021] In an embodiment, the sensor mover shell includes:

[0022] A sensor mover base is provided with the mounting groove.

[0023] A sensor mover upper cover is provided on the slot opening of the mounting groove.

[0024] To achieve the above object, the utility model further provides a linear transmission system, which comprises:

[0025] A stator base;

[0026] A motor stator assembly is arranged on the stator base.

[0027] A motor mover assembly is arranged at least two, and the motor mover assemblies are arranged along the length direction of the motor stator assembly; the magnetic field generated by the motor mover assembly interacts with the magnetic field generated by the motor stator assembly to drive the motor mover assembly to move.

[0028] The sensor mover assembly as described above is arranged at least two, and each sensor mover assembly is connected to a motor mover assembly.

[0029] A detection device is arranged on the stator base and comprises a calculation circuit assembly and a plurality of detection chips connected to the calculation circuit assembly; the detection chips are arranged along the moving direction of the sensor mover assembly, and the detection chips are configured to detect the magnetic field of the sensor mover assembly.

[0030] To achieve the above object, the linear transmission system further comprises:

[0031] A magnetic isolation device is arranged on the stator base, and the sensor mover assembly and the detection chips are arranged on one side of the magnetic isolation device, and the motor stator assembly is arranged on the other side of the magnetic isolation device.

[0032] The technical scheme of the utility model discloses a magnetic conduction structure or Halbach magnet array structure is designed, and the intensity of the end magnetic field of the sensor rotor magnet steel can be effectively reduced, so that the end magnetic field of the sensor rotor magnet steel does not act on the detection chip between the two adjacent motor rotor assemblies, the safety distance between the two adjacent motor rotor assemblies can be reduced, that is, when the two rotors (motor rotor assemblies) of the linear transmission system are close to each other, the end magnetic field of the sensor rotor magnet steel does not act on the detection chip between the two adjacent motor rotor assemblies, but only acts on the corresponding detection chip, so that the multi-rotor detection precision can be improved, the needs of the number and small spacing of the multi-rotor of the linear transmission system can be met, and the detection precision can be improved while reducing the distance between the two motor rotor assemblies.

[0033] Therefore, the technical scheme of the utility model discloses a magnetic conduction structure or Halbach magnet array structure is designed, and the intensity of the end magnetic field of the sensor rotor magnet steel can be effectively reduced, so that the end magnetic field of the sensor rotor magnet steel does not act on the detection chip between the two adjacent motor rotor assemblies, the safety distance between the two adjacent motor rotor assemblies can be reduced, that is, when the two rotors (motor rotor assemblies) of the linear transmission system are close to each other, the end magnetic field of the sensor rotor magnet steel does not act on the detection chip between the two adjacent motor rotor assemblies, but only acts on the corresponding detection chip, so that the multi-rotor detection precision can be improved, the needs of the number and small spacing of the multi-rotor of the linear transmission system can be met, and the detection precision can be improved while reducing the distance between the two motor rotor assemblies. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the structure shown in these drawings without creative labor for those skilled in the art.

[0035] Figure 1 The structural schematic diagram of the linear transmission system of an embodiment provided by the utility model is shown in the figure.

[0036] Figure 2 The front view of the linear transmission system of an embodiment provided by the utility model is shown in the figure.

[0037] Figure 3 The explosion view of the sensor rotor assembly of an embodiment provided by the utility model is shown in the figure.

[0038] Figure 4 The structural schematic diagram of the sensor rotor magnet steel in the sensor rotor assembly of an embodiment provided by the utility model is shown in the figure.

[0039] Figure 5The structure schematic diagram of the sensor rotor magnetic steel in another embodiment of the sensor rotor assembly provided by the utility model is shown in the figure.

[0040] Figure 6 The magnetic field distribution diagram of the sensor rotor magnetic steel in another embodiment of the sensor rotor assembly provided by the utility model is shown in the figure.

[0041] Figure 7 The magnetic field distribution diagram of the sensor rotor magnetic steel in another embodiment of the sensor rotor assembly provided by the utility model is shown in the figure.

[0042] Figure 8 The magnetic field intensity contrast diagram of different sensor rotor magnetic steels.

[0043] Explanation of the figure mark:

[0044] Reference Name Reference Name 100 Linear transmission system 143 Third magnetic steel 10 Sensor mover assembly 1431 Fourth magnetic steel 11 Sensor mover housing 1432 Fifth magnetic steel 111 Sensor mover base 20 Stator base 1111 Mounting slot 30 Motor stator assembly 1112 Connecting ear 40 Motor mover assembly 112 Sensor mover cover plate 50 Detection device 12 Sensor mover magnetic steel 51 Solving circuit assembly 13 Magnetic guide structure 52 Detection chip 14 Halbach magnetic steel array structure 60 Magnetic isolation device 141 First magnetic steel 70 Driving circuit assembly 142 Second magnetic steel

[0045] The realization, functional features and advantages of the utility model will be further explained by combining with the embodiments and referring to the drawings. Specific implementation

[0046] The technical scheme in the embodiments of the utility model will be clearly and completely described by combining with the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0047] It should be noted that if the directionality indication (such as up, down, left, right, front, back...) is involved in the embodiments of the utility model, the directionality indication is only used to explain the relative position relationship, movement condition and the like between the components in a certain specific posture, if the specific posture changes, the directionality indication also changes accordingly.

[0048] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0049] The linear transmission system position detection generally uses a magnetic sensor, which mainly includes a magnetic field generating device and a sensor detection device. The magnetic field generating device is generally a sensor rotor magnetic steel and its structural member, and the sensor detection device includes a detection chip and a signal solving circuit. The output signal of the detection chip under the action of different magnetic fields has difference. In the moving process of the rotor, the magnetic field generated by the sensor rotor magnetic steel will act on different detection chips. Because the magnetic field acting on different detection chips is different, the position information of the sensor rotor magnetic steel can be obtained by solving the different output signals of the detection chip, and then the position of the moving part of the linear transmission system can be solved.

[0050] However, when the magnetic field of the sensor rotor magnetic steel decays to a magnetic field strength that cannot be effectively recognized by the detection chip, a certain distance requirement is needed, that is, the detection chip outside the coverage area of the sensor rotor magnetic steel will also be effectively recognized, and position information will be generated. When the two adjacent moving parts (motor rotor assembly) of the linear transmission system approach each other, the detection chip outside the coverage area of the sensor rotor magnetic field will output effective position information, that is, the detection chip between the two moving parts outputs effective position information, which leads to the inability to effectively identify and distinguish the two moving parts.

[0051] In the related art, the current common scheme is to increase the distance between the two moving parts, so that the detection chip between the two moving parts cannot effectively recognize the position information, and then distinguish the different moving parts. However, increasing the distance between the two moving parts will limit the number of moving parts in the linear transmission system, and reducing the distance between the two moving parts will lead to low detection accuracy, and cannot realize the detection and identification of multiple rotors.

[0052] Based on the above problems, the utility model provides a sensor rotor assembly 10, which aims to solve the problem of low detection accuracy of the sensor rotor assembly 10 when the two rotors of the linear transmission system 100 approach each other.

[0053] Referring to Figures 1 to 7 In an embodiment of the utility model, the sensor rotor assembly 10 comprises a sensor rotor shell 11 and a sensor rotor magnet 12; the sensor rotor shell 11 is provided with a mounting groove 1111; the sensor rotor magnet 12 is arranged in the mounting groove 1111; wherein at least one end of the sensor rotor magnet 12 is provided with a magnetic conduction structure 13, or the magnetization mode of at least one end magnet of the sensor rotor magnet 12 is a Halbach magnet array structure 14.

[0054] The technical scheme of the utility model can effectively reduce the strength of the end magnetic field of the sensor rotor magnet 12 by arranging the magnetic conduction structure 13 at least one end of the sensor rotor magnet 12, which can effectively absorb the magnetic field of the end of the sensor rotor magnet 12 and limit the free emission of the end magnetic field of the sensor rotor magnet 12; or by designing the magnetization mode of at least one end magnet of the sensor rotor magnet 12 as a Halbach magnet array structure 14, which can enhance the magnetic field intensity on one side and weaken the magnetic field intensity on the other side, thereby converging the end magnetic field of the sensor rotor magnet 12 to weaken the end magnetic field of the sensor rotor magnet 12, thereby effectively reducing the strength of the end magnetic field of the sensor rotor magnet 12.

[0055] Therefore, the design of the magnetic conduction structure 13 or the Halbach magnet array structure 14 can effectively reduce the strength of the end magnetic field of the sensor rotor magnet 12, so that the end magnetic field of the sensor rotor magnet 12 does not act on the detection chip 52 between the two adjacent motor rotor assemblies 40, which can reduce the safety distance between the two adjacent motor rotor assemblies 40, i.e., when the two rotors (motor rotor assemblies 40) of the linear transmission system 100 approach each other, the end magnetic field of the sensor rotor magnet 10 does not act on the detection chip 52 between the two adjacent motor rotor assemblies 40, but only acts on the corresponding detection chip 52, thereby improving the multi-rotor detection accuracy and meeting the needs of multi-rotor quantity and small pitch of the linear transmission system 100, thereby achieving the reduction of the distance between the two motor rotor assemblies 40 while improving the detection accuracy.

[0056] It should be noted that the magnetic conductive structure 13 can be made of silicon steel, soft magnetic material, 10# steel, SPCC (mainly composed of three parts, the first part represents the material, such as: S (Steel) represents steel, F (Ferrum) represents iron; The second part represents different shapes, types, and purposes, such as P (Plate) represents plate, T (Tube) represents tube, K (Kogu) represents tool; The third part represents the characteristic number, which is generally the minimum tensile strength. For example: SS400 - the first S represents steel (Steel), the second S represents "structure" (Structure), and 400 is the lower limit tensile strength 400MPa, which represents a general structure steel with a tensile strength of 400MPa), and other magnetic conductive materials.

[0057] In actual application, the magnetic conductive structure 13 can be arranged at one end of the sensor rotor magnetic steel 12, or the magnetic conductive structure 13 can be arranged at both ends of the sensor rotor magnetic steel 12; or the magnetization mode of the magnetic steel at one end of the sensor rotor magnetic steel 12 is the Halbach magnetic steel array structure 14, or the magnetization mode of the magnetic steel at both ends of the sensor rotor magnetic steel 12 is the Halbach magnetic steel array structure 14.

[0058] In an embodiment of the present application, please refer to Figure 4 , the magnetic conductive structure 13 is arranged at both ends of the sensor rotor magnetic steel 12, or please refer to Figure 5 、 Figure 6 , the magnetization mode of the magnetic steel at both ends of the sensor rotor magnetic steel 12 is the Halbach magnetic steel array structure 14.

[0059] In this way, by arranging the magnetic conductive structure 13 at both ends of the sensor rotor magnetic steel 12, or by arranging the Halbach magnetic steel array structure 14 at both ends of the sensor rotor magnetic steel 12, the strength of the magnetic field at both ends of the sensor rotor magnetic steel 12 can be effectively reduced, so that the magnetic field at both ends of the sensor rotor magnetic steel 12 does not act on the detection chip 52 on any side, and the safety distance between any two adjacent motor rotor assemblies 40 can be effectively reduced.

[0060] Please refer to Figure 5 、 Figure 6 , in an embodiment of the present application, the Halbach magnetic steel array structure 14 includes at least three magnetic steels, and the at least three magnetic steels are magnetized in different directions. The magnetic steel that outputs the magnetic field outward in the Halbach magnetic steel array structure 14 is defined as an output magnetic steel, and the magnetization direction of the output magnetic steel is toward the middle of the sensor rotor magnetic steel 12.

[0061] In this way, the end magnetic steel in the sensor mover magnetic steel 12 is equivalent to being split into at least three magnetic steels, and the magnetization mode of the at least three magnetic steels is the Halbach magnetic steel array structure 14, so that the Halbach magnetic steel array structure 14 formed can effectively enhance the magnetic field strength on one side and weaken the magnetic field strength on the other side, so as to effectively weaken the end magnetic field strength of the sensor mover magnetic steel 12.

[0062] It should be noted that the output magnetic steel refers to the magnetic steel in the Halbach magnetic steel array structure 14 that outputs the magnetic field to the outside.

[0063] Please refer to Figure 5 In an embodiment of the utility model, the at least three magnetic steels include a first magnetic steel 141, a second magnetic steel 142 and a third magnetic steel 143; the first magnetic steel 141 is close to the middle part of the sensor mover magnetic steel 12, the second magnetic steel 142 and the third magnetic steel 143 are stacked at the end of the first magnetic steel 141; the magnetization direction of the first magnetic steel 141 is opposite to the magnetization direction of the second magnetic steel 142, and the magnetization direction of the third magnetic steel 143 is towards the first magnetic steel 141 and the middle part of the sensor mover magnetic steel 12.

[0064] It can be understood that, when Figure 5 the side close to the detection chip 52 is the side of the sensor mover magnetic steel 12 facing downward, and the side far from the detection chip 52 is the side of the sensor mover magnetic steel 12 facing upward, taking the right Halbach magnetic steel array structure 14 as an example: the magnetization direction of the first magnetic steel 141 is downward, the magnetization mode of the second magnetic steel 142 is upward, and the magnetization mode of the third magnetic steel 143 is leftward. Taking the left Halbach magnetic steel array structure 14 as an example: the magnetization direction of the first magnetic steel 141 is downward, the magnetization mode of the second magnetic steel 142 is upward, and the magnetization mode of the third magnetic steel 143 is rightward. In this way, the magnetization direction of the two third magnetic steels 143 in the right Halbach magnetic steel array structure 14 and the left Halbach magnetic steel array structure 14 are both towards the middle part of the sensor mover magnetic steel 12, which can effectively converge the magnetic field strength at the end of the sensor mover magnetic steel 12, so as to weaken the magnetic field strength at the end of the sensor mover magnetic steel 12.

[0065] In this embodiment, the first magnetic steel 141 with the downward magnetization direction is the main magnetic steel, and the second magnetic steel 142 and the third magnetic steel 143 with the leftward or rightward magnetization direction are auxiliary magnetic steels, the main magnetic steel functions to generate a larger magnetic field, and the auxiliary magnetic steels function to converge the magnetic field strength, which can effectively weaken the magnetic field strength at the end of the sensor mover magnetic steel 12.

[0066] Alternatively, please refer to Figure 6In another embodiment of the utility model, at least three magnetic steels include first magnetic steel 141, second magnetic steel 142 and third magnetic steel 143;First magnetic steel 141 is close to the middle part of sensor rotor magnetic steel 12, second magnetic steel 142 is arranged at the end of first magnetic steel 141, and third magnetic steel 143 is arranged at the end of second magnetic steel 142;The magnetization direction of first magnetic steel 141 is opposite to the magnetization direction of third magnetic steel 143, and the magnetization direction of first magnetic steel 141 and third magnetic steel 143 is all towards second magnetic steel 142, and the magnetization direction of third magnetic steel 143 is towards the middle part of sensor rotor magnetic steel 12.

[0067] It can be understood that, with Figure 6 When the side of sensor rotor magnetic steel 12 close to detection chip 52 is on the side of downward and the side of sensor rotor magnetic steel 12 far from detection chip 52 is on the side of upward, taking right side Halbach magnetic steel array structure 14 as an example: the magnetization direction of first magnetic steel 141 is right, the magnetization direction of second magnetic steel 142 is downward, and the magnetization direction of third magnetic steel 143 is left. Taking left side Halbach magnetic steel array structure 14 as an example: the magnetization direction of first magnetic steel 141 is left, the magnetization direction of second magnetic steel 142 is downward, and the magnetization direction of third magnetic steel 143 is right. Such design can also make the magnetization direction of two third magnetic steels 143 in right side Halbach magnetic steel array structure 14 and left side Halbach magnetic steel array structure 14 all towards the middle part of sensor rotor magnetic steel 12, which can effectively weaken the magnetic field intensity of the end of sensor rotor magnetic steel 12.

[0068] In the embodiment, second magnetic steel 142 with downward magnetization direction is main magnetic steel, and first magnetic steel 141 and third magnetic steel 143 with left or right magnetization direction are auxiliary magnetic steels, the role of main magnetic steel is to generate larger magnetic field, and the role of auxiliary magnetic steel is to concentrate magnetic field intensity, which can effectively weaken the magnetic field intensity of the end of sensor rotor magnetic steel 12.

[0069] Please refer to Figure 7 In an embodiment of the utility model, first magnetic steel 141 is close to the middle part of sensor rotor magnetic steel 12, second magnetic steel 142 is arranged at the end of first magnetic steel 141, and third magnetic steel 143 is arranged at the end of second magnetic steel 142;When the magnetization direction of first magnetic steel 141 is opposite to the magnetization direction of third magnetic steel 143, and the magnetization direction of first magnetic steel 141 and third magnetic steel 143 is all towards second magnetic steel 142, and the magnetization direction of third magnetic steel 143 is towards the middle part of sensor rotor magnetic steel 12, the magnetization mode of the end magnetic steel of at least three magnetic steels is composite Halbach magnetic steel array structure.

[0070] Thus, by using the principle that the Halbach magnet array can enhance the magnetic field strength on one side and weaken the magnetic field strength on the other side, by making the magnetizing mode of the end magnet of the at least three magnets a composite Halbach magnet array structure, the magnetic field strength of the end of the sensor mover magnet 12 can be further reduced, so as to further reduce the safety distance between the two adjacent motor mover assemblies 40, and at the same time, the Halbach magnet array structure 14 is used inside the detection interval, which can enhance the magnetic field strength in the detection interval of the motor mover assembly 40, and improve the anti-interference ability of the sensor mover assembly 10.

[0071] Referring to Figure 7 In an embodiment of the present application, the composite Halbach magnet array structure includes at least two magnets, and the at least two magnets are magnetized in different directions, and the magnet that outputs the magnetic field outward in the composite Halbach magnet array structure is defined as a composite output magnet, and the magnetization direction of the composite output magnet is towards the middle part of the sensor mover magnet 12.

[0072] Thus, the end magnet in the Halbach magnet array structure 14 is equivalent to being split into at least two magnets, so that the magnetizing mode of the at least two magnets is a composite Halbach magnet array structure, and the composite Halbach magnet array structure formed in this way can effectively enhance the magnetic field strength on one side and weaken the magnetic field strength on the other side, so as to effectively weaken the magnetic field strength of the end of the sensor mover magnet 12.

[0073] It should be noted that the composite output magnet refers to the magnet that outputs the magnetic field outward in the composite Halbach magnet array structure.

[0074] Referring to Figure 7 In an embodiment of the present application, the at least two magnets include a fourth magnet 144 and a fifth magnet 145, the fourth magnet 144 and the fifth magnet 145 are stacked at the end of the second magnet 142, the magnetization direction of the fourth magnet 144 is opposite to the magnetization direction of the second magnet 142, and the magnetization direction of the fifth magnet 145 is towards the middle part of the sensor mover magnet 12.

[0075] It can be understood that the composite output magnet refers to the magnet that outputs the magnetic field outward in the composite Halbach magnet array structure. Figure 7The side of the sensor rotor magnetic steel 12 facing downward is close to the detection chip 52, and the side of the sensor rotor magnetic steel 12 facing upward is away from the detection chip 52, and the right composite Halbach magnetic steel array structure is taken as an example: the fifth magnetic steel 145 is magnetized upward, and the sixth magnetic steel is magnetized leftward; the left composite Halbach magnetic steel array structure is taken as an example: the fifth magnetic steel 145 is magnetized upward, and the sixth magnetic steel is magnetized rightward. Such design can make the magnetization directions of the two fifth magnetic steels 145 in the right composite Halbach magnetic steel array structure and the left composite Halbach magnetic steel array structure both face the middle part of the sensor rotor magnetic steel 12, so that the magnetic field strength of the end part of the sensor rotor magnetic steel 12 can be effectively weakened.

[0076] It should be noted that, for the magnetic field strength generated by different sensor rotor assemblies 10 on the detection chip 52, compared with the traditional sensor rotor magnetic steel 12 (three magnetic pole structure), the different sensor rotor magnetic steels 12 can effectively reduce the magnetic field strength between the adjacent two motor rotor assemblies 40, and the design of the end composite Halbach magnetic steel array structure can not only reduce the magnetic field strength between the adjacent two motor rotor assemblies 40, but also enhance the magnetic field strength in the detection interval of the motor rotor assembly 40, and improve the anti-interference performance. Of course, the scheme is not only suitable for the three magnetic pole structure, but also suitable for other magnetic pole structures. Figure 8

[0077] Please refer to Figure 3 In an embodiment of the utility model, one side of sensor rotor shell 11 is equipped with connecting lug 1112, connecting lug 1112 is used for connecting motor rotor assembly 40.

[0078] In this way, by using connecting lug 1112 to connect sensor rotor assembly 10 on motor rotor assembly 40, sensor rotor assembly 10 can be more stably connected to motor rotor assembly 40.

[0079] In actual application, connecting lug 1112 can be connected to motor rotor assembly 40 by screw, buckle and the like.

[0080] Please refer to Figure 3 In an embodiment of the utility model, sensor rotor shell 11 includes sensor rotor base 111 and sensor rotor upper cover, sensor rotor base 111 is equipped with mounting groove 1111, and sensor rotor upper cover is arranged in the slot of mounting groove 1111.

[0081] ​In this way, the sensor mover magnetic steel 12 is installed in the mounting groove 1111 of the sensor mover base 111, and the sensor mover cover plate 112 is used to cover the slot opening of the mounting groove 1111 to cover the sensor mover magnetic steel 12, thereby protecting the sensor mover magnetic steel 12.

[0082] In an embodiment, the connection between the sensor mover cover plate 112 and the sensor mover base 111 can be achieved by using screws.

[0083] Please refer to Figure 1 、 Figure 2 The utility model also proposes a linear transmission system 100, the linear transmission system 100 includes stator base 20, motor stator assembly 30, motor mover assembly 40, sensor mover assembly 10 and detection device 50, the specific structure of sensor mover assembly 10 refers to the above-mentioned embodiment, because the linear transmission system 100 adopts all the technical solutions of the above-mentioned all embodiments, therefore at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, here will not repeat.

[0084] Among them, motor stator assembly 30 is arranged on stator base 20, motor mover assembly 40 is at least two, at least two motor mover assembly 40 is spaced apart along the length direction of motor stator assembly 30, the magnetic field generated by motor mover assembly 40 and the magnetic field generated by motor stator assembly 30 interact to push motor mover assembly 40 to move, sensor mover assembly 10 is at least two, and each sensor mover assembly 10 is connected to a motor mover assembly 40, detection device 50 is arranged on stator base 20 and includes solving circuit component 51, a plurality of detection chips 52 are electrically connected to solving circuit component 51, a plurality of detection chips 52 are arrayed along the moving direction of sensor mover assembly 10, and detection chip 52 is configured to detect the magnetic field of sensor mover assembly 10.

[0085] It can be understood that the power of linear transmission system 100 comes from the interaction of the magnetic field generated by motor stator assembly 30 under the current excitation and the magnetic field generated by motor mover assembly 40 to push motor mover assembly 40 to move, and the load is connected to motor mover assembly 40 to drive motor mover assembly 40 to move. In addition, sensor mover assembly 10 is connected to motor mover assembly 40 to move with motor mover assembly 40, and the magnetic field generated by sensor mover assembly 10 acts on different detection chips 52 during the movement of motor mover assembly 40, because the magnetic field acting on different detection chips 52 is different, the position information of sensor mover assembly 10 can be obtained by solving the differential output signal of detection chip 52 through solving circuit component 51, and the position of the load can be solved.

[0086] In addition, in the sensor mover assembly 10, by arranging the magnetic conductive structure 13 at least one end of the sensor magnet steel, the magnetic conductive structure 13 can effectively absorb the magnetic field at the end of the sensor mover magnet steel 12, limit the free emission of the magnetic field at the end of the sensor mover magnet steel 12, thereby effectively reducing the strength of the magnetic field at the end of the sensor mover magnet steel 12; or by designing the magnetization mode of at least one end magnet steel of the sensor mover magnet steel 12 as a Halbach magnet steel array structure 14, the Halbach magnet steel array structure 14 can enhance the strength of the magnetic field on one side and weaken the strength of the magnetic field on the other side, so as to weaken the magnetic field at the end of the sensor mover magnet steel 12, thereby effectively reducing the strength of the magnetic field at the end of the sensor mover magnet steel 12.

[0087] Therefore, by designing the magnetic conductive structure 13 or the Halbach magnet steel array structure 14, the strength of the magnetic field at the end of the sensor mover magnet steel 12 can be effectively reduced, so that the magnetic field at the end of the sensor mover magnet steel 12 does not act on the detection chip 52 between the two adjacent motor mover assemblies 40, the safety distance between the two adjacent motor mover assemblies 40 can be reduced, the needs of multiple mover quantity and small spacing of the linear transmission system 100 can be met, and the detection and recognition of multiple movers can be realized.

[0088] Please refer to Figure 1 In an embodiment of the utility model, the linear transmission system 100 further comprises a magnetic isolation device 60, the magnetic isolation device 60 is arranged on the stator base 20, the sensor mover assembly 10 and the detection chip 52 are located on one side of the magnetic isolation device 60, and the motor stator assembly 30 is located on the other side of the magnetic isolation device 60.

[0089] In this way, by arranging the magnetic isolation device 60 between the motor stator assembly 30 and the detection chip 52, the sensor mover assembly 10 and the detection chip 52 are located on one side of the magnetic isolation device 60, and the motor stator assembly 30 is located on the other side of the magnetic isolation device 60. The irregular magnetic field generated by the motor stator assembly 30 under the action of current excitation can be effectively isolated by the magnetic isolation device 60, so as to reduce the influence of the irregular magnetic field generated by the motor stator assembly 30 under the action of current excitation on the detection chip 52, thereby improving the position detection accuracy of the linear transmission system 100.

[0090] It should be noted that by locating the detection chip 52 and the sensor rotor assembly 10 on the same side of the magnetic isolation device 60, the magnetic field generated by the sensor rotor magnetic steel 12 in the sensor rotor assembly 10 can act on the detection chip 52, and the magnetic isolation device 60 will not affect the normal operation of the sensor rotor assembly 10. At the same time, the part of the magnetic isolation device 60 between the detection chip 52 and the sensor rotor assembly 10 is basically the same, so the influence of the magnetic isolation device 60 on the magnetic field generated by the sensor rotor magnetic steel 12 is basically unchanged, thereby making the output signal of the detection chip 52 basically unchanged, and the influence of this part can be corrected by position compensation of the sensor rotor assembly 10.

[0091] In the embodiment, an air gap is provided between the sensor rotor assembly 10 and the magnetic isolation device 60 to avoid mutual interference between the moving sensor rotor assembly 10 and the fixed magnetic isolation device 60. In addition, an air gap is also provided between the magnetic isolation device 60 and the motor rotor assembly 40 to avoid mutual interference between the moving motor rotor assembly 40 and the fixed magnetic isolation device 60.

[0092] It should be noted that the magnetic isolation device 60 can be made of 10# steel, SPCC (mainly composed of three parts, the first part represents the material, such as: S (Steel) represents steel, F (Ferrum) represents iron; The second part represents different shapes, types, and purposes, such as P (Plate) represents plate, T (Tube) represents tube, K (Kogu) represents tool; The third part represents the characteristic number, which is generally the minimum tensile strength. Such as: SS400 - the first S represents steel (Steel), the second S represents "structure" (Structure), and 400 is the lower limit tensile strength 400MPa, which represents a general structural steel with a tensile strength of 400MPa), and other magnetic conductive materials. One form of magnetic field isolation of the magnetic conductive material is to absorb the interference magnetic field to reduce the influence of the irregular magnetic field generated by the motor stator assembly 30 under the action of current excitation on the detection chip 52 and the sensor rotor assembly 10.

[0093] In actual application, the magnetic isolation device 60 can be a plate-shaped, block-shaped, strip-shaped structural member, as long as it can reduce the influence of the irregular magnetic field generated by the motor stator assembly 30 under the action of current excitation on the detection chip 52.

[0094] Please refer to Figure 1 In an embodiment of the utility model, the stator base 20 is further provided with a driving circuit assembly 70, and the driving circuit assembly 70 is configured to control the power supply of the motor stator assembly 30.

[0095] In this way, the power supply of the motor stator assembly 30 can be controlled by the driving circuit, so that the motor stator assembly 30 generates a magnetic field under the action of current excitation.

[0096] The above merely describes exemplary embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation, direct / indirect application in other related technical fields, or the like, made by using the present application specification and drawings, are included in the patent protection scope of the present application.

Claims

1. A sensor mover assembly, characterized by, The sensor rotor shell is provided with a mounting groove. The sensor rotor magnet is arranged in the mounting groove. At least one end of the sensor rotor magnet is provided with a magnetic guide structure, or the magnetization mode of at least one end magnet of the sensor rotor magnet is a Halbach magnet array structure. Both ends of the sensor rotor magnet are provided with the magnetic guide structure, or the magnetization mode of both end magnets of the sensor rotor magnet is the Halbach magnet array structure.

2. The sensor rotor assembly of claim 1, wherein, The Halbach magnet array structure includes at least three magnets, at least three of the magnets are magnetized in different directions, and a magnet that outputs a magnetic field outward in the Halbach magnet array structure is defined as an output magnet, and the magnetization direction of the output magnet is towards the middle of the sensor rotor magnet.

3. The sensor rotor assembly of claim 1, wherein, The at least three magnets include a first magnet, a second magnet and a third magnet.

4. The sensor rotor assembly of claim 3, wherein, The first magnet is close to the middle of the sensor rotor magnet, the second magnet and the third magnet are stacked at the end of the first magnet, the magnetization direction of the first magnet is opposite to that of the second magnet, and the magnetization direction of the third magnet is towards the first magnet and the middle of the sensor rotor magnet. Alternatively, the first magnet is close to the middle of the sensor rotor magnet, the second magnet is arranged at the end of the first magnet, and the third magnet is arranged at the end of the second magnet, the magnetization direction of the first magnet is opposite to that of the third magnet, the magnetization direction of the first magnet and the third magnet is towards the second magnet, and the magnetization direction of the third magnet is towards the middle of the sensor rotor magnet. The first magnet is close to the middle of the sensor rotor magnet, the second magnet is arranged at the end of the first magnet, and the third magnet is arranged at the end of the second magnet, the magnetization direction of the first magnet is towards the second magnet.

5. The sensor rotor assembly of claim 4, wherein, The magnetization mode of the third magnet is a composite Halbach magnet array structure. The composite Halbach magnet array structure includes at least two magnets, at least two of the magnets are magnetized in different directions, and a magnet that outputs a magnetic field outward in the composite Halbach magnet array structure is defined as a composite output magnet, and the magnetization direction of the composite output magnet is towards the middle of the sensor rotor magnet.

6. The sensor rotor assembly of claim 5, wherein, The at least two magnets include a fourth magnet and a fifth magnet.

7. The sensor rotor assembly of claim 6, wherein, The fourth magnet and the fifth magnet are stacked at the end of the second magnet, the magnetization direction of the fourth magnet is opposite to that of the second magnet, and the magnetization direction of the fifth magnet is towards the middle of the sensor rotor magnet. One side of the sensor rotor shell is provided with a connecting lug for connecting a motor rotor assembly.

8. The sensor rotor assembly of any one of claims 1 to 7, wherein, The sensor rotor shell includes:

9. The sensor rotor assembly of any one of claims 1 to 7, wherein, A sensor rotor base provided with the mounting groove; A sensor rotor upper cover arranged at the slot opening of the mounting groove. It includes:

10. A linear transmission system, characterized by A stator base; A motor stator assembly arranged in the stator base; ​ The motor mover assembly is provided with at least two motor mover assemblies which are spaced along the length direction of the motor stator assembly; the magnetic field generated by the motor mover assembly interacts with the magnetic field generated by the motor stator assembly to push the motor mover assembly to move; The sensor mover assembly according to any one of claims 1 to 9 is provided with at least two sensor mover assemblies, each of which is connected to a motor mover assembly. The detection device is arranged on the stator base and comprises a calculation circuit assembly and a plurality of detection chips electrically connected to the calculation circuit assembly; the detection chips are arranged in an array along the moving direction of the sensor mover assembly and are configured to detect the magnetic field of the sensor mover assembly.

11. The linear transport system of claim 10, wherein, The linear transmission system further comprises: The magnetic isolation device is arranged on the stator base, and the sensor mover assembly and the detection chips are located on one side of the magnetic isolation device, and the motor stator assembly is located on the other side of the magnetic isolation device.

Images