An electro-erosion protection device, electric machine assembly and vehicle

Abstract

An electrocorrosion protection device, an electric machine assembly and a vehicle. The electrocorrosion protection device comprises a conductive ring and a conductive fiber and a sensing portion fixedly connected with the conductive ring; the conductive ring comprises a base portion, a fixing portion and a contact portion electrically connected, the fixing portion fixes the conductive fiber, and the contact portion is used for electrically connecting with a grounding member; one end of the conductive fiber is used for electrically contacting with a motor shaft of an electric machine, and the other end is fixedly connected with the fixing portion; wherein the sensing portion is fixedly arranged on the base portion and is used for receiving a signal emitted by a reflecting portion fixedly arranged on an inner ring of a connecting bearing to determine movement information of the motor shaft. The utility model solves the problem that the existing electrocorrosion protection device cannot meet the industrial manufacturing requirements.

Description

Technical Field

[0001] This utility model belongs to the field of electric motors, specifically relating to an electro-corrosion protection device, an electric motor assembly, and a vehicle. Background Technology

[0002] During motor operation, especially for servo motors or variable frequency motors, the capacitive effect, electromagnetic effect, and electrostatic effect generated by rotational friction on the shaft can cause the shaft voltage to rise, leading to bearing breakdown and damage. To address the problem of electro-corrosion in motor bearings, electro-corrosion protection devices are typically installed. These devices usually have conductive rings and multiple conductive fibers that can contact the motor bearing. The conductive rings electrically connect the conductive fibers to a grounding device (such as the motor housing), allowing the shaft voltage to be released through this path, thus effectively protecting the motor bearing.

[0003] Meanwhile, as a core component of many devices, motors are widely used in numerous fields, and their performance and precision have a crucial impact on the operating efficiency and quality of related equipment. Therefore, it is often necessary to monitor the motor's operation and working status to detect problems early and reduce potential damage. Consequently, motor monitoring components are often installed on motors to monitor their operating conditions.

[0004] However, as the requirements for motors in various fields continue to increase while the available installation space continues to decrease, the existing solutions that separately arrange electro-corrosion protection devices and motor testing components are clearly insufficient to meet design requirements, especially space requirements. Furthermore, in addition to space requirements, the manufacturing difficulties of electro-corrosion protection devices and motor testing components in large-scale industrial production must also be considered, as well as the operational difficulty and efficiency of operators installing and assembling the corresponding devices. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an electro-corrosion protection device, a motor assembly, and a vehicle, thereby solving the problem that existing electro-corrosion protection devices cannot meet the needs of industrial manufacturing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides an electro-corrosion protection device, comprising a conductive ring and conductive fibers and a sensing portion fixedly connected to the conductive ring; the conductive ring includes an electrically connected base, a fixing portion, and a contact portion, the fixing portion fixing the conductive fibers, and the contact portion for electrical connection with a grounding component; one end of the conductive fibers is used for electrical contact with the motor shaft of a motor, and the other end is fixedly connected to the fixing portion; wherein the sensing portion is fixedly disposed on the base and is used to receive signals emitted by a reflector fixed on the inner ring of a connecting bearing to determine the motion information of the motor shaft.

[0007] As one embodiment of this utility model, it also includes a parsing IC electrically connected to the sensing unit, the parsing IC being configured to determine the motion information of the motor shaft based on the signal received by the sensing unit; optionally, the parsing IC is fixedly disposed on the base.

[0008] In one embodiment of this utility model, the sensing part and / or the parsing IC and the fixing part are disposed on the same side of the base; wherein, the fixing part is disposed on the side of the base away from the center of the motor; and / or, a PCB board is disposed on the base, and the PCB board is electrically connected to the fixing part and the contact part respectively; wherein, the base is the PCB board.

[0009] A second aspect of this utility model provides a motor assembly, including a motor, a motor housing, a connecting bearing, and the electro-corrosion protection device described in the first aspect of this utility model. The motor housing is configured to mount the motor and allow the motor shaft of the motor to extend from the motor housing. The connecting bearing includes an inner ring and an outer ring that are rotatably connected. The inner ring is fixedly disposed at a set position on the motor shaft, and the outer ring is fixedly connected to the motor housing. The motor assembly further includes a reflective portion fixedly disposed on the inner ring of the connecting bearing.

[0010] In one embodiment of this utility model, the reflective part is a flange that extends from the inner ring of the connecting bearing to the outer ring. The reflective part is disposed on the side of the inner ring near the electro-corrosion protection device, wherein the distance between the reflective part and the surface of the outer ring of the connecting bearing facing the reflective part is not less than 0.2 mm.

[0011] In one embodiment of this utility model, the grounding component is the motor housing, and the motor housing is detachably connected to the electro-corrosion protection device through the contact portion. The motor housing includes a first step and a second step, and the first step and the second step have a passage for the motor shaft to pass through. The inner wall of the first step is fixed to the outer ring of the connecting bearing, and the second step is detachably fixed to the base.

[0012] In one embodiment of this utility model, the sensing part is an inductive eddy current coil, and the reflecting part has a convex section that generates a reflected magnetic field based on the inductive eddy current coil; the convex section is provided on the side of the reflecting part facing the electro-corrosion protection device; alternatively, the inductive eddy current coil includes a transmitting coil and two receiving coils, and the transmitting coil and the receiving coil are arranged to enable the transmitting coil to generate a secondary voltage in the two receiving coils.

[0013] In one embodiment of this utility model, the reflective portion is further provided with a concave section on the side facing the electro-corrosion protection device, the concave section being used to strengthen the structural strength of the reflective portion; wherein, the concave section and the convex section are spaced apart; and / or, the distance between the convex section and the electro-corrosion protection device is 0.1-10mm; the outer diameter of the convex section of the reflective portion is smaller than the outer diameter of the outer ring, and the difference between the outer diameter of the convex section and the outer diameter of the inner ring is not less than 0.3mm.

[0014] In one embodiment of this utility model, the sensing part is a Hall sensor, and the reflecting part has magnetic poles for generating a magnetic field.

[0015] A third aspect of this utility model provides a vehicle that includes the electro-corrosion protection device described in the first aspect of this utility model, or the motor assembly described in the second aspect of this utility model.

[0016] In summary, compared with the prior art, the present invention has at least one of the following beneficial technical effects:

[0017] 1. By setting an inductive eddy current coil on the electro-corrosion protection device and arranging a reflector on the connecting bearing of the motor shaft, it is possible to effectively acquire the motion information of the motor shaft (such as speed, steering angle and direction of rotation) through the electro-corrosion protection device, which facilitates subsequent detection and analysis.

[0018] 2. Compared to other solutions that separately set the mounting point of the reflector on the motor shaft, the solution of this utility model can effectively maintain a fixed distance between the inductive eddy current coil and the reflector without modifying the motor shaft. When improving existing products, only the connecting bearing needs to be replaced, without major adjustments. At the same time, since the relative position of the connecting bearing and the base of the electro-corrosion protection device is basically fixed under the constraint of the motor housing, there is no need to worry about the problem of complex quality inspection caused by the large difference in distance between the reflector and the inductive eddy current coil in different batches. This reduces costs while improving the measurement accuracy of the product. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a top view of a connecting bearing provided in a specific embodiment of this utility model;

[0021] Figure 2 yes Figure 1AA section diagram;

[0022] Figure 3 This is a perspective view of a connecting bearing provided in a specific embodiment of this utility model;

[0023] Figure 4 This is an installation diagram of a motor assembly provided in a specific embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram showing the positions of the connecting bearing and the electro-corrosion protection device provided in a specific embodiment of this utility model;

[0025] Figure 6 This is a schematic diagram of the connecting bearing and the electro-corrosion protection device provided in a specific embodiment of the present invention (the electro-corrosion protection device is transparent).

[0026] Figure 7 This is a top view of another connecting bearing provided in a specific embodiment of this utility model;

[0027] Figure 8 This is a perspective view of another connecting bearing provided in a specific embodiment of the present utility model;

[0028] Figure 9 A schematic diagram of another connecting bearing and electro-corrosion protection device provided in a specific embodiment of this utility model (the electro-corrosion protection device is transparent).

[0029] Explanation of reference numerals in the attached figures:

[0030] 100. Electro-corrosion protection device; 110. Conductive ring; 111. Base; 112. Fixing part; 113. Contact part; 120. Conductive fiber; 130. Inductive eddy current coil; 140. Analysis IC; 150. Hall sensor;

[0031] 210. Motor shaft; 220. Motor housing; 221. First stage; 222. Second stage;

[0032] 300, Connecting bearing; 310, Inner ring; 320, Outer ring; 330, Reflecting part; 331, Concave section; 332, Convex section; 340, Roller; 350, Cover; 360, Magnetic pole. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only used for illustration and explanation of the present utility model, and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "up," "down," "left," "right," "front," and "back" generally refer to up, down, left, and right in the actual use or working state of the device, specifically the drawing directions in the accompanying drawings.

[0034] It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of embodiments of this utility model. Furthermore, the descriptions of each embodiment in the following embodiments have their own emphasis; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0035] Please see Figure 1-6 The figure shows an electro-corrosion protection device 100, which includes a conductive ring 110 and a conductive fiber 120 fixedly connected. The conductive ring 110 is detachably and fixedly mounted on the motor housing 220 and can be in communication with the motor housing 220. The conductive fiber 120 is fixedly mounted on the conductive ring 110 and is used to electrically connect the motor shaft 210 of the motor and the conductive ring 110, thereby realizing the electrical connection between the motor shaft 210 of the motor and a grounding component (e.g., the motor housing 220, or a grounding terminal).

[0036] Specifically, the conductive ring 110 includes a fixed base 111, a fixing part 112, and a contact part 113. The base 111 is coaxially disposed with the motor shaft 210 of the motor but not in contact with it. The base 111 has a circular or arc-shaped structure and is detachably fixed to the motor housing 220 of the motor, thereby achieving relative fixation between the base 111 and the motor shaft 210. The base 111 can be divided radially into an inner edge region near the motor shaft 210, an outer edge region near the motor housing 220, and an intermediate region located between the inner and outer edge regions. The specific rules for dividing the inner edge region, outer edge region, and intermediate region are not limited in this invention; they can be evenly distributed or freely divided as needed.

[0037] The contact portion 113 is used for electrical connection with the motor housing 220 or the grounding terminal. Preferably, the contact portion 113 is located in the outer edge region of the base 111 and can be mechanically fixed to the motor housing 220 or the grounding terminal, thereby realizing the detachable fixing of the electro-corrosion protection device 100 to the motor housing 220 or the grounding terminal. It should be noted that there are many solutions for the contact portion 113 in the prior art, which will not be described in detail here.

[0038] Preferably, to optimize the connection path from the conductive fiber 120 to the grounding component (e.g., motor housing 220 / grounding terminal), a PCB board is also provided on the base 111. The PCB board is electrically connected to the fixing part 112 and the contact part 113, respectively. This allows for better connection between the conductive fiber 120 and the motor housing 220 / grounding terminal by setting specific circuits and electronic components on the PCB board. A PCB board can be provided on all or part of the base 111. When a PCB board is provided on all areas of the base 111, the base 111 itself becomes a PCB board, reducing manufacturing processes and improving manufacturing efficiency.

[0039] A fixing part 112 is fixedly disposed on the inner edge region of the base 111 for fixing at least one conductive fiber 120 and can be electrically connected to the contact part 113. Preferably, the fixing part 112 can fix a fiber bundle composed of multiple conductive fibers 120. The fiber bundle is arranged radially along the base 111, with one end fixedly connected to the fixing part 112 and the other end in contact with the motor shaft 210 of the motor. Preferably, the length of the fiber bundle is slightly greater than the distance from the fixing part 112 to the motor shaft 210, and it has a certain degree of flexibility and conductivity, thereby enabling the fiber bundle to stably contact the motor shaft 210. When the motor shaft 210 rotates, the fiber bundle can still stably contact the motor shaft 210, realizing an electrical connection with the motor shaft 210.

[0040] It is understandable that, in order to improve the stability of the connection, multiple fixing parts 112 are provided. These multiple fixing parts 112 are arranged circumferentially on the same side of the inner edge region of the base 111, preferably on the side furthest from the center of the motor. Figure 4 In this specific embodiment, the center of the motor is located on the left side of the base 111, the motor shaft 210 passes through the corresponding through hole provided on the base 111, and the fixing part 112 is provided on the right side of the base 111. This invention does not limit the arrangement of the multiple fixing parts 112; they can be arranged at equal intervals along the circumference in the inner edge region of the base 111, or they can be arranged according to other specific rules and methods, which will not be elaborated further.

[0041] Therefore, by setting the conductive ring 110 and the conductive fiber 120, the motor shaft 210 and the motor housing 220 / grounding terminal can be electrically connected well, thereby avoiding electro-corrosion of the motor shaft 210 and improving the service life of the entire motor.

[0042] However, as mentioned earlier, with the market providing less and less space for motor installation, and in order to better reduce costs, the inventors attempted to make further improvements.

[0043] Please continue reading. Figure 4 A connecting bearing 300 is mounted on the motor shaft 210 of the motor. The connecting bearing 300 has an inner ring 310 and an outer ring 320 that are rotatable relative to each other; a plurality of rollers 340 are disposed in the annular gap between the inner ring 310 and the outer ring 320; and an annular cover 350 covering the openings on both sides of the annular gap. The inner ring 310 and the outer ring 320 are coaxially spaced apart, with the inner ring 310 located inside the outer ring 320. The annular cover 350 is disposed in the gap between the inner ring 310 and the outer ring 320 to reduce the contact of the rollers with dust. The cover 350 is flush with the sides of the inner ring 310 and the outer ring 320, so that the sides of the connecting bearing 300 are also flush. The inner ring 310 of the connecting bearing 300 is fixedly connected to the motor shaft 210, and the outer ring 320 of the connecting bearing 300 is fixedly connected to the housing of the motor housing 220. The purpose of providing the connecting bearing 300 is to ensure the stable rotation of the motor shaft 210 and to guarantee the efficient operation and reliability of the motor. During actual operation, the motor shaft 210 will be subjected to various forces, including radial forces (forces perpendicular to the axis) and axial forces (forces along the axis). By providing the connecting bearing 300, the motor shaft 210 can be well supported, ensuring it remains in a stable position during operation, thereby improving operational accuracy. Preferably, the connecting bearing 300 is positioned between the motor stator and the electro-corrosion protection device 100, further optimizing the space occupied by the motor.

[0044] The motor housing 220 can position the connecting bearing 300 and the electro-corrosion protection device 100 at specific locations relative to the motor shaft 210. That is, the motor housing 220 is provided with connection areas that are respectively fixed to the connecting bearing 300 and the electro-corrosion protection device 100.

[0045] Preferably, the outer diameter of the connecting bearing 300 is smaller than the outer diameter of the electro-corrosion protection device 100, thereby forming a stepped structure in the connection area where the motor housing 220 is fixed to the connecting bearing 300 and the electro-corrosion protection device 100, to better achieve the connection between the motor housing 220 and the connecting bearing 300 and the electro-corrosion protection device 100. Specifically, the motor housing 220 includes a first step 221 and a second step 222, which form a stepped structure. Both the first step 221 and the second step 222 have coaxially arranged openings that allow the motor shaft 210 to pass through. The opening size of the first step 221 is smaller than the opening size of the second step 222. The inner wall of the first step 221 is fixed to the outer ring 320 of the connecting bearing 300. The opening of the second step 222 is not smaller than the opening of the first step 221 and not larger than the outer diameter of the base 111 of the electro-corrosion protection device 100. The second step 222 is detachably fixed to the base 111.

[0046] Please continue reading. Figure 1-6 A reflector 330 is provided on the inner ring 310 of the connecting bearing 300 near the side of the electro-corrosion protection device 100, and a sensor capable of receiving signals emitted by the reflector is provided on the base 111 of the electro-corrosion protection device 100. Figure 3-6 In this embodiment, the sensing element is an eddy current coil 130. The eddy current coil 130 can generate a high-frequency alternating magnetic field using the eddy current effect. The reflecting element 330 can generate a reflected magnetic field based on the high-frequency alternating magnetic field generated by the eddy current coil 130, and propagate the reflected magnetic field to the eddy current coil, thereby changing the impedance of the eddy current coil 130. Subsequently, based on the impedance value of the eddy current coil 130, the rotational speed, steering angle, and rotation direction of the reflecting element 330 can be calculated, and thus the rotational speed, steering angle, and rotation direction of the motor shaft 210 can be calculated.

[0047] It should be noted that there are many existing implementation schemes for the arrangement of the inductive eddy current coil 130, and this utility model does not limit this. In a preferred embodiment of this utility model, the inductive eddy current coil 130 includes one transmitting coil and two receiving coils, and the transmitting coil and receiving coils are arranged such that the transmitting coil generates a secondary voltage in the two receiving coils. The specific voltage value depends on the position of the transmitting coil and the reflector 330. The preferred distance between the transmitting coil and the reflector 330 in this utility model is 0.1-10mm. This arrangement aims to ensure measurement accuracy while minimizing the space occupied by both components, thus reducing the overall space required by the motor.

[0048] It should be noted that there are many existing solutions for testing the impedance value of the eddy current coil 130, and this utility model does not limit this. In a preferred embodiment provided by this utility model, the electro-corrosion protection device 100 is also provided with an analysis IC 140 matched with the sensing part. The analysis IC can analyze the information received by the sensing part to determine the motion characteristics of the motor shaft. When the sensing part is an eddy current coil, the analysis IC is an eddy current analysis IC. The analysis IC 140 is electrically connected to the eddy current coil 130 and is used to calculate the impedance of the eddy current coil 130 and calculate the relevant motion information of the reflector 330. It is naturally understood that when the base 111 is a PCB board, the analysis IC 140 can be printed on the PCB board to achieve a fixed setting between the analysis IC 140 and the base 111.

[0049] In another alternative implementation, the analytical IC140 is not provided, that is, the impedance of the inductor eddy current coil 130 is not analyzed and calculated on the electro-corrosion protection device 100. Instead, the digital signal output by the inductor eddy current coil 130 is directly output to an external component, and the analysis and calculation are realized through the external component.

[0050] Therefore, by setting an inductive eddy current coil 130 on the electro-corrosion protection device 100 and arranging a reflector 330 on the connecting bearing 300 of the motor shaft 210, it is possible to effectively acquire motion information (such as speed, steering angle and rotation direction) of the motor shaft 210 through the electro-corrosion protection device 100, which facilitates subsequent detection and analysis.

[0051] It should be noted that the placement of the reflector 330 on the connecting bearing 300 of the motor has specific significance. Specifically, when receiving motion information from the reflector 330 via the sensing unit (in this embodiment, via the inductor eddy current coil 130), to ensure measurement repeatability and stability, given that the inductor eddy current coil 130 is fixed to the electro-corrosion protection device 100 and the installation position of the electro-corrosion protection device 100 relative to the motor shaft 210 is fixed, it is necessary to ensure that the reflector 330 is also in a relative position to the motor shaft 210. By fixing the reflector 330 on the connecting bearing 300, the relative position of the connecting bearing 300 and the motor shaft 210 is kept fixed under the action of the motor housing 220, thus ensuring that the relative position of the inductor eddy current coil 130 and the reflector 330 is within the set error range. It is understandable that during large-scale mass production, this setting can effectively ensure that the relative distance between the inductor eddy current coil 130 and the reflector 330 on multiple motors in the same batch is the same or basically the same, ensuring quality control and facilitating testing.

[0052] Compared to other solutions that separately set the mounting point of the reflector 330 on the motor shaft 210, the solution of this utility model can effectively maintain a fixed distance between the inductive eddy current coil 130 and the reflector 330 without modifying the motor shaft 210. When improving existing products, only the connecting bearing 300 needs to be replaced, without major adjustments. At the same time, since the relative position of the connecting bearing 300 and the base 111 of the electro-corrosion protection device 100 is basically fixed under the constraint of the motor housing 220, there is no need to worry about the problem of complex quality inspection caused by the large difference in distance between the reflector 330 and the inductive eddy current coil 130 in different batches. This reduces costs while improving product measurement accuracy.

[0053] In order to better detect the motion information of the motor shaft 210 and improve manufacturing efficiency, the inventors further improved the reflector 330.

[0054] Please continue reading. Figure 1-3 The reflective portion 330 is a flange that extends from the inner ring 310 of the connecting bearing 300 to the outer ring 320. The reflective portion 330 and the inner ring 310 of the connecting bearing 300 are fixedly installed, and the reflective portion 330 is located on the side of the inner ring 310 closer to the electro-corrosion protection device 100. A concave section 331 and a convex section 332 are provided on the side of the reflective portion 330 facing the electro-corrosion protection device 100. The convex section 332 protrudes from the concave section 331, that is, the convex section 332 is located closer to the electro-corrosion protection device 100 than the concave section 331.

[0055] The advantage of setting a flange is that it can effectively ensure the area of ​​the side of the reflective part 330 facing the electro-corrosion protection device 100, while also minimizing the difficulty of assembling the connecting bearing 300. For example, the existing installation steps for the connecting bearing 300 mainly involve assembly (using freezing technology to shrink the bearing and install it into the bearing housing cavity), heat fitting (heating the housing and then placing the bearing in), and direct press fitting (mechanical pressing in). Since the steel balls inside the bearing have retainers, setting a flange will not affect the position of each steel ball, nor will it affect the installation process of the connecting bearing 300.

[0056] The convex segment 332 can generate a reflected magnetic field based on the high-frequency alternating magnetic field of the inductive eddy current coil 130. In one specific embodiment, the convex segment 332 is composed of a material with high electrical conductivity and high magnetic permeability, such as a metallic material or an alloy material, wherein the metallic material is preferably iron, nickel, or steel; the composite material is preferably stainless steel, titanium alloy, or nickel-based alloy, but it can also be made of other materials, and there is no limitation thereto. In an alternative embodiment, the convex segment 332 is coated with a coating that can generate a reflected magnetic field, and there are many solutions for this in the prior art, which will not be described in detail here.

[0057] The concave section 331 is designed to enhance the mechanical strength of the entire reflective part 330. This results in better structural strength and impact resistance for the entire reflective part 330. It is understandable that in applications where the mechanical strength requirements of the reflective part 330 are not high, the concave section 331 may be omitted, and only the convex section 332 may be used, meaning that a reflective magnetic field can be generated on the side of the reflective part 330 closest to the electro-corrosion protection device 100.

[0058] It should be noted that this utility model does not limit the arrangement of the concave segment 331 and the convex segment 332; they can be equally divided or distributed according to a predetermined rule. As for the dimensions of the convex segment 332 and the concave segment 331, they can be the same or the dimension of the convex segment 332 can be larger than the dimension of the concave segment 331; there is no specific limitation.

[0059] Please continue reading. Figure 1-6 In one specific embodiment, in order to better detect the motion information of the motor shaft, the distance (H1) between the reflector 330 and the outer ring of the connecting bearing 300 facing the reflector is not less than 0.2 mm.

[0060] In one specific embodiment, in order to better detect the motion information of the motor shaft, the distance between the protrusion 332 and the conductive ring 110 of the electro-corrosion protection device 100 is preferably 0.1-10mm.

[0061] In one specific embodiment, to facilitate assembly and manufacturing, the outer diameter of the protrusion 332 is smaller than the outer diameter of the outer ring 320, and the difference between the outer diameter of the protrusion 332 and the outer diameter of the inner ring 310 is not less than 0.3 mm. Meanwhile, to ensure detection accuracy, the diameter of the protrusion 332 on the reflector 330 is not less than 1.8 times the diameter of the inductive eddy current coil 130.

[0062] It should be noted that the sensing unit only needs to be able to sense the signal emitted by the reflecting unit; this application does not restrict whether it can emit signals to the reflecting unit. Figure 3-6 In this embodiment, the sensing element is an eddy current coil, which can both send signals to the reflecting element and receive signals from the reflecting element. The advantage of using an eddy current coil and its corresponding reflecting element is that by simply comparing the signals sent by the eddy current coil and the signals received by it, the motion information of the motor shaft where the reflecting element is located can be analyzed, and real-time monitoring of parameters such as the speed, direction, and rotation angle of the motor 100 can be achieved.

[0063] In another alternative implementation, the sensing element is primarily used to receive signals emitted by the reflecting element. See also... Figure 7-8The figure shows another type of motor assembly that includes a motor, a connecting bearing 300, and an electro-corrosion protection device 100. It is similar to... Figure 3-6 The difference in the motor assembly in this embodiment lies mainly in the difference between the sensing part and the reflecting part.

[0064] exist Figure 7-8 In this implementation, the sensing part is a Hall sensor 150, and the reflective part has magnetic poles 360 that can generate a magnetic field on the side facing the electro-corrosion protection device 100. The magnetic poles 360 preferably include a pair of S-pole magnets and N-pole magnets spaced apart, so that the Hall sensor 150 can receive the magnetic signal generated by the magnetic field generated by the magnetic poles 360. When the reflective part 330 rotates with the motor shaft 210, the Hall sensor 150 can infer the motion information of the motor shaft based on the received magnetic signal, realizing real-time monitoring of parameters such as the rotation speed, direction of rotation, and rotation angle of the motor shaft 210. Of course, preferably, multiple pairs of S-pole magnets and N-pole magnets can be provided for higher signal accuracy; the specific configuration can be adjusted according to accuracy requirements, and this invention does not impose any limitations.

[0065] Accordingly, in one specific implementation, in order to better detect the motion information of the motor shaft, the radial dimension of the magnetic pole 360 ​​is not less than 1mm.

[0066] The present invention has been described in detail above. Specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

[0067] Throughout this specification, references to "an embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0068] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0069] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

Claims

1. An electro-corrosion protection device, characterized in that, It includes a conductive ring and conductive fibers and a sensing part that are fixed to the conductive ring; The conductive ring includes an electrically connected base, a fixing part, and a contact part. The fixing part fixes the conductive fiber, and the contact part is used for electrical connection with a grounding component. One end of the conductive fiber is used for electrical contact with the motor shaft of the motor, and the other end is fixedly connected to the fixing part; in The sensing element is fixed on the base and is used to receive signals emitted by the reflector fixed on the inner ring of the connecting bearing to determine the motion information of the motor shaft.

2. The electro-corrosion protection device according to claim 1, characterized in that, It also includes a parsing IC electrically connected to the sensing unit, the parsing IC being configured to determine the motion information of the motor shaft based on the signal received by the sensing unit; Optionally, the parsing IC is fixedly mounted on the base.

3. The electro-corrosion protection device according to claim 2, characterized in that, The sensing part and / or the parsing IC are disposed on the same side of the base as the fixing part; wherein the fixing part is disposed on the side of the base away from the center of the motor; And / or, a PCB board is provided on the base, and the PCB board is electrically connected to the fixing part and the contact part respectively; wherein, the base is the PCB board.

4. A motor assembly, characterized in that, The device includes a motor, a motor housing, a connecting bearing, and an electro-corrosion protection device as described in any one of claims 1-3. The motor housing is configured to mount the motor and allow the motor shaft to extend from the motor housing. The connecting bearing includes an inner ring and an outer ring that are rotatably connected. The inner ring is fixedly disposed at a predetermined position on the motor shaft, and the outer ring is fixedly connected to the motor housing. The motor assembly also includes a reflector fixedly mounted on the inner ring of the connecting bearing.

5. The motor assembly according to claim 4, characterized in that, The reflective portion is a flange that extends from the inner ring of the connecting bearing to the outer ring. The reflective portion is located on the side of the inner ring near the electro-corrosion protection device. The distance between the reflective part and the outer ring of the connecting bearing facing the reflective part is not less than 0.2 mm.

6. The motor assembly according to claim 4, characterized in that, The grounding component is the motor housing, and the motor housing is detachably connected to the electro-corrosion protection device via the contact portion. The motor housing includes a first stage and a second stage, both having holes through which the motor shaft can pass; the inner wall of the first stage is fixed to the outer ring of the connecting bearing, and the second stage is detachably fixed to the base.

7. The motor assembly according to any one of claims 4-6, characterized in that, The sensing part is an inductive eddy current coil, and the reflecting part has a convex section that generates a reflected magnetic field based on the inductive eddy current coil; the convex section is provided on the side of the reflecting part facing the electro-corrosion protection device; Alternatively, the inductive eddy current coil includes a transmitting coil and two receiving coils, the transmitting coil and the receiving coils being arranged such that the transmitting coil generates a secondary voltage in the two receiving coils.

8. The motor assembly according to claim 7, characterized in that, The reflective part is further provided with a recessed section on the side facing the electro-corrosion protection device, and the recessed section is used to strengthen the structural strength of the reflective part; wherein, the recessed section and the convex section are arranged at intervals; And / or, the distance between the convex section and the electro-corrosion protection device is 0.1-10mm; the outer diameter of the convex section of the reflective part is smaller than the outer diameter of the outer ring, and the difference between the outer diameter of the convex section and the outer diameter of the inner ring is not less than 0.3mm.

9. The motor assembly according to any one of claims 4-6, characterized in that, The sensing part is a Hall sensor, and the reflecting part has magnetic poles for generating a magnetic field.

10. A vehicle, characterized in that, It includes the electro-corrosion protection device according to any one of claims 1-3, or the motor assembly according to any one of claims 4-9.

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