Eddy current sensor rotor, eddy current sensor, motor and vehicle

Abstract

This disclosure discloses an eddy current sensor rotor, an eddy current sensor, a motor, and a vehicle. The eddy current sensor rotor of this disclosure includes a main body, a plurality of blades, and a sealing member. The plurality of blades are connected to the main body and arranged at circumferential intervals along the main body, with the intervals between adjacent blades opening away from the main body. The sealing member is connected to the blades to close the openings of the intervals between adjacent blades. Therefore, the eddy current sensor rotor according to this disclosure can reduce churning torque and reduce churning losses.

Description

Technical Field

[0001] This disclosure relates to the field of eddy current sensor technology, specifically to an eddy current sensor rotor, an eddy current sensor, a motor, and a vehicle. Background Technology

[0002] In technologies such as new energy vehicles, rotary transformers are commonly used as angle position sensors for drive motors. However, with increasing speed and improved torque control accuracy, the industry has begun to adopt higher-precision eddy current sensors for angle position detection. In related technologies, under conditions such as oil cooling, the oil may overflow the rotor of the eddy current sensor, causing the rotor to churn and easily detach from its shaft, resulting in oil churning losses and increased energy consumption. Utility Model Content

[0003] This disclosure aims to at least partially address one of the technical problems in the related art.

[0004] Therefore, embodiments of this disclosure provide an eddy current sensor rotor, comprising:

[0005] Main body;

[0006] Multiple blades are connected to the main body and are arranged at circumferential intervals along the main body, with the intervals between adjacent blades opening in a direction away from the main body.

[0007] A sealing component, which is connected to the blade to close the opening in the gap between adjacent blades.

[0008] Therefore, the eddy current sensor rotor according to the embodiments of this disclosure can reduce the churning torque and reduce churning losses.

[0009] In some embodiments, the sealing component includes a sealing ring sleeved on the outside of the blade, with the outer periphery of the blade contacting the inner peripheral wall of the sealing ring. This can further reduce the churning torque of the eddy current sensor rotor.

[0010] In some embodiments, the main body, the blades, and the sealing ring are integrally formed. This improves the structural strength of the eddy current sensor rotor.

[0011] In some embodiments, the main body and the blade are integrally formed, and the sealing ring is interference-fitted or bonded to the blade to ensure a secure connection between the sealing ring and multiple blades.

[0012] In some embodiments, the inner peripheral wall of the sealing ring is provided with a positioning groove, and the outer periphery of the blade fits into the positioning groove. This improves the stability of the connection between the sealing ring and the blade.

[0013] In some embodiments, the positioning groove is an annular groove, and the outer periphery of the blade is interference-fitted within the annular groove. This facilitates improved assembly efficiency of the sealing ring.

[0014] In some embodiments, the inner peripheral wall of the sealing ring is provided with multiple pairs of positioning blocks, and the outer periphery of each blade is fitted between the pairs of positioning blocks. This is to improve the stability of the connection between the sealing ring and the blade.

[0015] In some embodiments, the sealing member includes a filling portion that fits within the gap between adjacent blades. This reduces the porosity of the gap, thereby reducing the churning torque of the eddy current sensor rotor.

[0016] In some embodiments, the shape of the filling portion is adapted to the interval to fill the interval, thereby further reducing the churning torque of the eddy current sensor rotor.

[0017] In some embodiments, the sealing component further includes a sealing ring, the filling portion being connected to the sealing ring, the sealing ring being sleeved on the outside of the blade, and the outer periphery of the blade being in contact with the inner peripheral wall of the sealing ring. The sealing ring and the filling portion cooperate so that the sealing component can close the opening of the gap between adjacent blades and fill at least a portion of the gap between adjacent blades, thereby facilitating the reduction of the churning torque of the eddy current sensor rotor.

[0018] In some embodiments, the sealing member includes a first side plate and a second side plate connected to define a receiving cavity, within which the main body and the blade are disposed. The first and second side plates form a sealing sleeve, thereby closing the gap between adjacent blades.

[0019] In some embodiments, either the main body or the blade is fitted to the first side plate and the second side plate on its two axial sides, respectively, of the main body. This makes the eddy current sensor rotor structure compact.

[0020] In some embodiments, the blocking component is a non-metallic component. This ensures that the blocking component does not affect the normal operation of the eddy current sensor rotor.

[0021] In some embodiments, the sealing component is a plastic component or a carbon fiber component.

[0022] In some embodiments, the filling portion is a non-metallic portion. This does not affect the normal operation of the eddy current sensor rotor according to embodiments of this disclosure.

[0023] In some embodiments, both the first side plate and the second side plate are non-metallic side plates. This does not affect the normal operation of the eddy current sensor rotor according to embodiments of this disclosure.

[0024] In some embodiments, the sealing ring is a metal ring, and the radial dimension of the metal ring in the main body is greater than or equal to the axial thickness of the metal ring in the main body. This can improve the yield rate of stamping manufacturing and reduce manufacturing difficulty.

[0025] Embodiments of this disclosure also provide an eddy current sensor, including a rotor and a stator, wherein the rotor is the aforementioned eddy current sensor rotor. This results in a rotor of the eddy current sensor according to embodiments of this disclosure having low churning torque, low churning loss, and is less prone to loosening, thereby improving operational reliability.

[0026] Embodiments of this disclosure also provide a motor including the aforementioned eddy current sensor. This results in high reliability of the angle detection data of the motor shaft.

[0027] Embodiments of this disclosure also propose a vehicle including the aforementioned motor. This results in high reliability of the angle detection data of the vehicle's motor shaft. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of an eddy current sensor according to an embodiment of the present disclosure.

[0029] Figure 2 This is a schematic diagram of an eddy current sensor rotor according to an embodiment of the present disclosure.

[0030] Figure 3 This is a front view of an eddy current sensor rotor according to an embodiment of the present disclosure.

[0031] Figure 4 This is a schematic diagram of an eddy current sensor rotor according to another embodiment of the present disclosure.

[0032] Figure 5 This is a schematic diagram of an eddy current sensor rotor according to yet another embodiment of the present disclosure.

[0033] Figure 6 This is a schematic diagram of an eddy current sensor rotor according to another embodiment of the present disclosure.

[0034] Figure 7 This is a cross-sectional view of the rotor of an eddy current sensor according to an embodiment of the present disclosure.

[0035] Reference numerals: 1. Main body, 2. Blade, 3. Sealing ring, 4. Filling part, 5. First side plate, 6. Shaft, 7. Stator, 8. Rotor. Detailed Implementation

[0036] Embodiments of this disclosure are described in detail below, with examples of these embodiments illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this disclosure, and should not be construed as limiting it.

[0037] The rotor of an eddy current sensor according to an embodiment of the present disclosure is described below with reference to the accompanying drawings. Figures 1 to 7 As shown, the rotor of the eddy current sensor according to an embodiment of the present disclosure includes a main body 1, a plurality of blades 2, and a sealing component.

[0038] Multiple blades 2 are connected to the main body 1 and arranged at intervals along the circumference of the main body 1, with the intervals between adjacent blades 2 opening away from the main body 1. A sealing member is connected to the blades 2 to close the openings in the intervals between adjacent blades 2. Specifically, a through hole is provided at the center of the main body 1 for mounting on the rotating shaft 6. Both the main body 1 and the blades 2 are made of metal.

[0039] In related technologies, the rotor of an eddy current sensor has an open blade structure, meaning that the rotor has multiple blades and the opening between two adjacent blades faces outward. There are no components on the rotor to block the opening, so that after the oil submerges the rotor, it can easily enter the gap between the blades through the opening, thus bringing rotational resistance to the rotor, causing the rotor to loosen from the shaft, and causing oil churning loss.

[0040] According to the embodiments of the present disclosure, the eddy current sensor rotor is provided with a sealing component that closes the opening between adjacent blades 2, so that when the rotor rotates in oil, the oil will not enter the interval from the opening, thereby reducing the rotational resistance of the eddy current sensor rotor according to the embodiments of the present disclosure, effectively reducing the oil stirring torque of the eddy current sensor rotor under high-speed oil immersion conditions, making the rotor less likely to detach from the shaft, reducing oil stirring losses, and thus improving the reliability of the eddy current sensor rotor according to the embodiments of the present disclosure.

[0041] Therefore, the eddy current sensor rotor according to the embodiments of this disclosure can reduce the churning torque and reduce churning losses.

[0042] like Figures 1 to 7 As shown, in some embodiments, the sealing component includes a sealing ring 3, which is sleeved on the outside of the blade 2, with the outer periphery of the blade 2 in contact with the inner peripheral wall of the sealing ring 3. Specifically, the sealing ring 3 has an annular structure, and is sleeved on the outside of multiple blades 2 to close multiple gaps between the multiple blades 2. The outer peripheral surface of the sealing ring 3 is an arc surface, which can further reduce the churning torque of the eddy current sensor rotor.

[0043] like Figure 3As shown, in some embodiments, the main body 1, blade 2, and sealing ring 3 are integrally formed, that is, the main body 1, blade 2, and sealing ring 3 are a single structure, thereby improving the structural strength of the eddy current sensor rotor. For example, the main body 1, blade 2, and sealing ring 3 are formed by stamping a metal sheet.

[0044] like Figure 3 As shown, in some embodiments, the sealing ring 3 is a metal ring, and the radial dimension of the metal ring in the main body 1 is greater than or equal to the axial thickness of the metal ring in the main body 1, thereby improving the yield of stamping manufacturing and reducing manufacturing difficulty.

[0045] In some embodiments, the main body 1 and the blades 2 are integrally formed, and the sealing ring 3 is interference-fitted or bonded to the blades 2. This facilitates the fixing of the sealing ring 3 to the outside of the plurality of blades 2, so that the sealing ring 3 is securely connected to the plurality of blades 2. For example, the main body 1 and the blades 2 are formed by stamping from a metal sheet.

[0046] In some embodiments, the inner peripheral wall of the sealing ring 3 is provided with a positioning groove, and the outer peripheral wall of the blade 2 fits into the positioning groove. This allows the blade 2 to engage with the inner peripheral wall of the sealing ring 3, thereby improving the stability of the connection between the sealing ring 3 and the blade 2. For example, the inner peripheral wall of the sealing ring 3 is provided with multiple positioning grooves, each corresponding to one of the multiple blades 2.

[0047] In some embodiments, the positioning groove is an annular groove, and the outer periphery of the blade 2 is interference-fitted within the annular groove. The annular groove can accommodate multiple blades 2, thereby facilitating the improvement of the assembly efficiency of the sealing ring 3.

[0048] In some embodiments, the inner peripheral wall of the sealing ring 3 is provided with multiple pairs of positioning blocks, and the outer periphery of each blade 2 is engaged between the pairs of positioning blocks. Specifically, each blade 2 abuts against a positioning block on both sides in the circumferential direction, thereby allowing multiple pairs of positioning blocks to limit the movement of multiple blades 2, so as to improve the stability of the connection between the sealing ring 3 and the blades 2.

[0049] like Figure 5 and Figure 6 As shown, in some embodiments, the sealing component includes a filling portion 4 that engages within the gap between adjacent blades 2. Specifically, the filling portion 4 can fill at least a portion of the gap between adjacent blades 2, thereby reducing the porosity of the gap and thus reducing the churning torque of the eddy current sensor rotor.

[0050] In some embodiments, the shape and spacing of the filling portion 4 are adapted to fill the gap. This allows the filling portion 4 to completely fill the gap between adjacent blades 2, thereby further reducing the churning torque of the eddy current sensor rotor.

[0051] like Figure 5As shown, in some embodiments, the sealing component further includes a sealing ring 3, and a filling portion 4 is connected to the sealing ring 3. The sealing ring 3 is sleeved on the outside of the blade 2, and the outer periphery of the blade 2 is in contact with the inner peripheral wall of the sealing ring 3. The sealing ring 3 and the filling portion 4 cooperate so that the sealing component can close the opening of the gap between adjacent blades 2 and fill at least a portion of the gap between adjacent blades 2, thereby facilitating the reduction of the churning torque of the eddy current sensor rotor.

[0052] like Figure 6 and Figure 7 As shown, in some embodiments, the sealing component includes a first side plate 5 and a second side plate, which are connected to define a receiving cavity. The main body 1 and the blades 2 are disposed within the receiving cavity. That is, the first side plate 5 and the second side plate form a sealing sleeve, and the main body 1 and the blades 2 are disposed within the receiving cavity formed by the first side plate 5 and the second side plate, thereby sealing the gap between adjacent blades 2 and reducing the churning torque of the eddy current sensor rotor.

[0053] In some embodiments, either the main body 1 or the blade 2 has its two axially aligned sides respectively abutting the first side plate 5 and the second side plate. Specifically, the first side plate 5 and the second side plate are respectively abutting the main body 1 and the blade 2 on both sides in the thickness direction (axial direction) to make the eddy current sensor rotor structure compact. For example, both the first side plate 5 and the second side plate have a central through hole, the diameter of which is greater than or equal to the diameter of the through hole in the main body 1, and the outer edges of both the first side plate 5 and the second side plate are connected to the sealing ring 3.

[0054] In some embodiments, the blocking component is a non-metallic component, so that the blocking component does not affect the normal operation of the eddy current sensor rotor.

[0055] In some embodiments, the sealing component is a plastic component or a carbon fiber component. Plastic components are easier and less expensive to manufacture, while carbon fiber components are lighter; the choice between plastic and carbon fiber components can be made according to requirements.

[0056] In some embodiments, the filling portion 4 is a non-metallic portion, and both the first side plate 5 and the second side plate are non-metallic side plates. Specifically, the sealing ring 3 can be a metal ring or a non-metallic ring, and the filling portion 4, the first side plate 5, and the second side plate are all made of non-metallic materials, thereby not affecting the normal operation of the eddy current sensor rotor according to embodiments of the present disclosure. For example, as... Figure 6 As shown, the sealing component includes a non-metallic sealing ring 3, a filling part 4, a first side plate 5, and a second side plate.

[0057] This disclosure also proposes an eddy current sensor, which, according to an embodiment of the present disclosure, includes a rotor 8 and a stator 7, wherein the rotor 8 is the rotor of the eddy current sensor according to an embodiment of the present disclosure. This results in the rotor of the eddy current sensor according to an embodiment of the present disclosure having low churning torque, low churning loss, and being less prone to loosening, thereby improving operational reliability.

[0058] This disclosure also proposes a motor, wherein the motor according to an embodiment of the present disclosure includes an eddy current sensor according to an embodiment of the present disclosure. The rotor 8 of the eddy current sensor according to an embodiment of the present disclosure is disposed on a rotating shaft 6, thereby preventing the rotor of the eddy current sensor from easily becoming loose during operation of the motor, thus ensuring high reliability of the angle detection data of the motor's rotating shaft 6.

[0059] This disclosure also proposes a vehicle, wherein the vehicle according to an embodiment of the disclosure includes a motor according to an embodiment of the disclosure, thereby making the angle detection data of the motor shaft 6 of the vehicle highly reliable.

[0060] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0062] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0063] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0064] In this disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0065] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. An eddy current sensor rotor, characterized by, include: Main body (1); Multiple blades (2) are connected to the main body (1) and are arranged at circumferential intervals along the main body (1), with the intervals between adjacent blades (2) opening in a direction away from the main body (1); A sealing component, which is connected to the blade (2) to close the opening of the gap between adjacent blades (2).

2. The eddy current sensor rotor of claim 1, wherein, The sealing component includes a sealing ring, which is sleeved on the outside of the blade (2), and the outer periphery of the blade (2) is in contact with the inner peripheral wall of the sealing ring.

3. The eddy current sensor rotor of claim 2, wherein, The main body (1), the blade (2), and the sealing ring are integrally formed.

4. The eddy current sensor rotor of claim 2, wherein, The main body (1) and the blade (2) are integrally formed, and the sealing ring is press-fitted or bonded to the blade (2).

5. The eddy current sensor rotor of claim 2, wherein, The inner peripheral wall of the sealing ring is provided with a positioning groove, and the outer peripheral of the blade (2) fits into the positioning groove.

6. The eddy current sensor rotor of claim 5, wherein, The positioning groove is an annular groove, and the outer periphery of the blade (2) is interference-fitted within the annular groove.

7. The eddy current sensor rotor of claim 2, wherein, The inner circumferential wall of the sealing ring is provided with multiple pairs of positioning blocks, and the outer circumference of each blade (2) is fitted between the pairs of positioning blocks.

8. The eddy current sensor rotor of claim 1, wherein, The sealing component includes a filling part (4) which fits within the gap between adjacent blades (2).

9. The eddy current sensor rotor according to claim 8, characterized in that, The shape of the filling part (4) is adapted to the interval to fill the interval.

10. The eddy current sensor rotor according to claim 8, characterized in that, The sealing component also includes a sealing ring, the filling part (4) is connected to the sealing ring, the sealing ring is sleeved on the outside of the blade (2), and the outer periphery of the blade (2) is in contact with the inner peripheral wall of the sealing ring.

11. The eddy current sensor rotor of any one of claims 1-10, wherein, The sealing component includes a first side plate (5) and a second side plate, the first side plate (5) and the second side plate are connected to define a receiving cavity, and the main body (1) and the blade (2) are disposed in the receiving cavity.

12. The eddy current sensor rotor of claim 11, wherein, The main body (1) and the blade (2) are respectively attached to the first side plate (5) and the second side plate on the two sides of the main body (1) in the axial direction.

13. The eddy current sensor rotor of claim 1, wherein, The sealing component is a non-metallic component.

14. The eddy current sensor rotor according to claim 13, characterized in that, The sealing component is a plastic component or a carbon fiber component.

15. The eddy current sensor rotor of claim 8, wherein, The filling part (4) is a non-metallic part.

16. The eddy current sensor rotor of claim 11, wherein, Both the first side plate (5) and the second side plate are non-metallic side plates.

17. The eddy current sensor rotor of claim 3, wherein, The sealing ring is a metal ring.

18. An eddy current sensor, characterized by It includes a rotor (8) and a stator (7), wherein the rotor (8) is the eddy current sensor rotor according to any one of claims 1-17.

19. An electric machine characterized by Including the eddy current sensor as described in claim 18.

20. A vehicle characterized by Includes the motor as described in claim 19.

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