Rotary variable differential transformer stator pressure plate structure, motor and vehicle

Abstract

The application provides a rotary variable stator pressing plate structure, a motor and a vehicle. The rotary variable stator pressing plate structure integrates a mounting ring surface for mounting a conductive brush and a shielding ring plate for electromagnetic shielding, avoids additional mounting space of a traditional independent shielding cover and an independent conductive brush, reduces the size of the motor in the axial direction to some extent, makes the motor smaller, is especially suitable for a motor with limited axial size, reduces the weight of the assembly, reduces the cost of the motor assembly, improves the competitiveness of the motor, and the like. In addition, the rotary variable stator pressing plate structure integrates the mounting ring surface for mounting the conductive brush and the shielding ring plate for electromagnetic shielding, so that the rotary variable stator pressing plate structure not only has a fixing function, but also has a mounting and shielding function, and is more diversified.

Description

Technical Field

[0001] This application relates to the field of new energy technology, and in particular to resolver stator plate structure, motor and vehicle. Background Technology

[0002] With the rapid development of the domestic new energy vehicle market, competition in technology and cost has become particularly fierce. As one of the core components of new energy vehicles, the upgrading of motor technology and cost control have become even more important. At the same time, the requirements for the intelligence and comfort of the whole vehicle have also increased significantly, and the number of components installed on the vehicle has also increased significantly, making the space requirements for the motor assembly increasingly stringent.

[0003] However, the current motor structure has the following main problems: (1) The resolver stator pressure plate in the motor structure has a single function, which is only to fix the stator; (2) The motor structure has an excessively large axial dimension, which leads to the motor assembly occupying a lot of space when it is placed on the vehicle.

[0004] Therefore, there is an urgent need for a resolver stator pressure plate structure, motor, and vehicle to solve the technical problems existing in the current technology to a certain extent. Utility Model Content

[0005] The purpose of this application is to provide a resolver stator pressure plate structure, a motor, and a vehicle, which to a certain extent diversifies the functions of the resolver stator pressure plate and solves the technical problem of the resolver stator pressure plate having a single function; in addition, it can reduce the axial size of the motor, so that the motor assembly can occupy less space when installed on the vehicle.

[0006] This application provides a rotary stator pressure plate structure; comprising: The resolver stator pressure plate body has a mounting end and an extension end formed at both ends along the axial direction; the resolver stator pressure plate body has a mounting ring surface for mounting a conductive brush on the inner side wall near the mounting end; when the conductive brush is mounted on the mounting ring surface, a conductive ring surface is formed on the side of the conductive brush away from the mounting ring surface. A shielding ring plate is disposed at the extended end of the main body of the resolver stator pressure plate and extends toward the axial direction of the main body of the resolver stator pressure plate; the diameter of the inner sidewall of the shielding ring plate is smaller than the diameter of the conductive ring surface, such that the inner sidewall of the shielding ring plate protrudes from the conductive ring surface in the radial direction.

[0007] In the above technical solution, further, the resolver stator pressure plate body has a retaining ring extending on the inner sidewall near the extended end toward the axial direction of the resolver stator pressure plate body; The retaining ring body has a retaining surface formed on the side near the mounting ring surface.

[0008] In the above technical solution, one end of the shielding ring plate is disposed on the end face opposite to the baffle ring body and the baffle surface, and the other end extends toward the axial direction of the main body of the resolver stator pressure plate.

[0009] In the above technical solution, the shielding ring plate, the blocking ring body, and the main body of the resolver stator pressure plate are integrally formed.

[0010] In the above technical solution, the material of the shielding ring plate is aluminum alloy.

[0011] This application also provides an electric motor, including a housing, a rotor spindle disposed within the housing, a commutator sleeved on the rotor spindle at a first preset position, and a conductive brush connected to the commutator; the electric motor also includes the aforementioned resolver stator pressure plate structure; The resolver stator pressure plate structure is sleeved on the commutator; The conductive brush is mounted on the mounting ring surface, and the conductive end of the conductive brush is connected to the commutator. When the conductive brush is installed on the mounting ring surface and connected to the commutator, the shielding ring plate overlaps with the commutator in the axial direction.

[0012] In the above technical solution, the shielding ring plate is further provided with an annular protrusion on the side opposite to the mounting end; The housing has an annular groove at a second preset position, and the annular protrusion can be inserted into the annular groove, so that the resolver stator pressure plate structure is coaxial with the housing; When the annular protrusion is inserted into the annular groove, a mounting cavity for mounting the resolver stator is also formed between the annular protrusion and the main body of the housing.

[0013] In the above technical solution, the outer side wall of the annular protrusion is further provided with an inclined surface at the end opposite to the shielding ring plate.

[0014] In the above technical solution, the motor further includes a connecting component, the connecting component comprising: A connecting lug is provided between the shielding ring plate and the annular protrusion, and protrudes from the main body of the resolver stator pressure plate; The connector passes sequentially through the connecting lug and the housing to fix the resolver stator pressure plate structure to the housing.

[0015] This application also provides a vehicle including the aforementioned motor.

[0016] Compared with the prior art, this application has the following beneficial effects: This application's resolver stator plate structure integrates a mounting ring for installing conductive brushes and a shielding ring for electromagnetic shielding. This avoids the additional installation space required by traditional independent shielding covers and independent conductive brushes, reducing the axial dimensions of the motor to a certain extent, resulting in a smaller motor size, especially suitable for motors with limited axial dimensions. It also reduces the overall weight of the motor assembly, achieving cost reduction and enhancing the motor's competitiveness. Furthermore, the resolver stator plate structure integrates a mounting ring for installing conductive brushes and a shielding ring for electromagnetic shielding, making it not only for fixing but also for installation and shielding, thus offering greater functionality. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the motor provided in this application from a first-view perspective; Figure 2 A schematic diagram of the motor provided in this application from a second perspective; Figure 3 for Figure 2 AA section view in the middle; Figure 4 for Figure 3 Enlarged view of point B in the image; Figure 5 for Figure 4 Enlarged view of point C in the image; Figure 6 A schematic diagram of the combined rotor mandrel and resolver stator pressure plate structure provided in this application, viewed from a first perspective. Figure 7 for Figure 6 Enlarged view of point D in the image; Figure 8 A schematic diagram of the combined rotor mandrel and resolver stator pressure plate structure provided in this application, viewed from a second perspective. Figure 9 This is a schematic diagram of the resolver stator pressure plate structure provided in this application from a first-view perspective. Figure 10 This is a schematic diagram of the resolver stator pressure plate structure provided in this application from a second perspective.

[0019] Reference numerals: 1-Resolver stator pressure plate body; 101-Axial direction; 102-Mounting end; 103-Extension end; 104-Mounting ring surface; 105-Blocking ring body; 106-Blocking surface; 2-Shielding ring plate; 201-Ceiling; 202-Annular protrusion; 3-Housing; 301-Rotor spindle; 302-Commutator; 303-Conductive brush; 306-Annular groove; 307-Mounting cavity; 308-Resolver stator; 309-Connecting component; 310-Connecting lug; 311-Connecting piece. Detailed Implementation

[0020] The following detailed embodiments are provided to aid the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent upon understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order presented herein; rather, changes that will be apparent upon understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, descriptions of features known in the art may be omitted for clarity and brevity. The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application. Throughout this specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. Conversely, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between. As used herein, the term "and / or" includes any one of the relevant items listed and any combination of any two or more of them. Although terms such as "first," "second," and "third" may be used herein to describe individual components, assemblies, regions, layers, or portions, these components, assemblies, regions, layers, or portions are not limited by these terms. More precisely, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as such in the examples may also be referred to as the second component, assembly, region, layer, or part. For ease of description, spatial relational terms such as “above,” “upper,” “below,” and “lower” may be used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relational terms are intended to include not only the orientation depicted in the drawings but also the different orientations of the device in use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element.Therefore, the term "above" includes both "above" and "below" depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., oscillating 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly. The terminology used herein is for describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "comprising," "including," and "having" enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof. Variations in the shapes shown in the figures may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the figures but include changes in shape that occur during manufacturing. The features of the examples described herein may be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible as will be apparent upon understanding the disclosure of this application.

[0021] Example 1 To address the technical problem that the resolver stator pressure plate in the motor structure has a single function and the motor structure's axial dimension is too large, resulting in the motor assembly occupying a lot of space in the vehicle, this application provides a resolver stator pressure plate structure and a motor, which will be discussed below. Figures 1-10 The structure of the resolver stator pressure plate and the motor are described in detail.

[0022] Combination Figure 1 As shown, the motor includes a housing 3, which protects the internal components, preventing the intrusion of external factors such as dust and moisture, avoiding damage to critical components such as the stator and rotor inside the housing 3, and protecting the motor from physical impacts during transportation or use. Furthermore, the housing 3 provides mechanical support to ensure that internal components of the motor (such as magnets and bearings) are in the correct positions.

[0023] Combination Figure 3 As shown, a rotor spindle 301 is housed within the casing 3. The rotor spindle 301 is a core component in the motor that connects the rotor core to the bearings. Figure 2 , Figure 3 See also Figure 4As shown, a commutator 302 is fitted onto the first preset position of the rotor spindle 301, and the commutator 302 is connected to the conductive brush 303. The commutator 302 converts the DC current input from the conductive brush 303 into AC current in the armature winding through mechanical commutation, so that the current direction automatically reverses every 180° rotation of the rotor coil, thereby maintaining a constant electromagnetic torque direction. The aforementioned first preset position can be selected as the position of the axial end of the rotor spindle 301.

[0024] Combination Figure 4 As shown, the motor also includes a resolver stator pressure plate structure, which is sleeved on the commutator 302; specifically, the resolver stator pressure plate structure includes a resolver stator pressure plate body 1 and a shielding ring plate 2.

[0025] Among them, combined Figure 9 and Figure 10 As shown, the resolver stator pressure plate body 1 has a cylindrical structure. The resolver stator pressure plate body 1 has a mounting end 102 and an extension end 103 formed at both ends along the axial direction 101, respectively. Figure 4 Taking the direction shown in the figure as an example, the right side of the resolver stator pressure plate body 1 is the mounting end 102, and the left side is the extension end 103. Furthermore, in conjunction with... Figure 6 and Figure 7 As shown, the resolver stator plate body 1 has a mounting ring surface 104 for mounting conductive brushes 303 formed on its inner sidewall near the mounting end 102. Since the resolver stator plate body 1 has a cylindrical structure, the mounting ring surface 104 is annular. Multiple conductive brushes 303 are provided, and the multiple conductive brushes 303 are arranged at intervals on the mounting ring surface 104. The conductive ends of the conductive brushes 303 are connected to the commutator 302. After the conductive brushes 303 are mounted on the mounting ring surface 104, the end of the conductive brushes 303 facing away from the mounting ring surface 104 forms a conductive ring surface, which is also annular.

[0026] Among them, still combined Figure 9 and Figure 10 As shown, the shielding ring plate 2 is disposed at the extension end 103 of the resolver stator pressure plate body 1 and extends towards the axial direction of the resolver stator pressure plate body 1, making the shielding ring plate 2 a ring structure. The diameter of the inner sidewall of the shielding ring plate 2 is smaller than the diameter of the conductive ring surface. Specifically, since the resolver stator pressure plate structure is sleeved on the commutator 302, and since the commutator 302 is sleeved on the rotor spindle 301, when the diameter of the inner sidewall of the shielding ring plate 2 is smaller than the diameter of the conductive ring surface, it means that the inner sidewall of the shielding ring plate 2 is closer to the rotor spindle than the conductive ring surface. Furthermore, when the conductive brush 303 is installed on the mounting ring surface 104 and connected to the commutator 302, the shielding ring plate 2 can overlap with the commutator 302 in the axial direction 101. Therefore, combined with... Figure 4As shown, the shielding ring plate 2 essentially covers the conductive brush 303, making the conductive brush 303 disconnected from its left side. In other words, the shielding ring plate 2 acts as a shield, using the principle of electrostatic balance to confine the external electric field outside the shielding ring plate 2 (to the left side of the shielding ring plate 2), while the internal electric field is eliminated through grounding, thereby protecting the resolver signal from interference. In addition, the shielding ring plate 2 can suppress high-frequency electromagnetic noise (such as PWM harmonics) from being coupled to the resolver winding through radiation or conduction, ensuring that the linear relationship between the output voltage amplitude and the rotation angle (such as sine and cosine resolvers) is not disturbed.

[0027] Alternatively, the shielding ring plate 2 can be made of aluminum alloy, making the shielding ring plate 2 lighter and reducing the overall weight of the motor to a certain extent, making it more practical.

[0028] In summary, the aforementioned resolver stator plate structure integrates the mounting ring surface 104 for mounting the conductive brush 303 and the shielding ring plate 2 for electromagnetic shielding. This avoids the additional mounting space required for traditional independent shielding covers and independent conductive brushes, reducing the axial dimensions of the motor to a certain extent, resulting in a smaller motor size. This is particularly suitable for motors with limited axial dimensions and also reduces the weight of the assembly, achieving cost reduction and enhancing the motor's competitiveness. Furthermore, the resolver stator plate structure integrates the mounting ring surface 104 for mounting the conductive brush 303 and the shielding ring plate 2 for electromagnetic shielding, making the resolver stator plate structure not only for fixing but also for mounting and shielding, thus offering more diverse functions.

[0029] In this embodiment, combined with Figure 4 and Figure 10 As shown, a retaining ring 105 extends from the inner sidewall of the resolver stator pressure plate body 1 near the extension end 103 towards the axial direction of the resolver stator pressure plate body 1. The retaining ring 105 is annular, and a retaining surface 106 is formed on the side of the retaining ring 105 near the mounting ring surface 104. When installing the conductive brush 303, the bottom wall of the conductive brush 303 is mounted on the mounting ring surface 104. The fixation of the bottom wall of the conductive brush to the mounting ring surface 104 ensures the radial connection stability between the conductive brush 303 and the commutator 302. The sidewall of the conductive brush 303 abuts against the retaining surface 106. This abutment ensures that the conductive brush 303 and the commutator 302 do not experience relative displacement in the axial direction. Furthermore, the retaining surface 106 can distribute the pressure of the conductive brush 303 towards the side, preventing single-point stress concentration and extending the service life of the conductive brush 303 and the commutator 302.

[0030] In this embodiment, it is still combined Figure 4 and Figure 10As shown, one end of the shielding ring plate 2 is disposed on the end face opposite to the baffle surface 106 of the baffle ring body 105, that is, the shielding ring plate 2 is disposed on the baffle ring body 105 and away from the mounting ring surface; in addition, the other end of the shielding ring plate 2 extends toward the axial direction of the resolver stator pressure plate body 1 and protrudes out of the baffle ring body 105. Figure 4 As can be seen, the mounting ring surface 104, the blocking surface 106, the upper surface of the blocking ring body 105, and the shielding ring plate 2 protruding from the blocking ring body 105 and facing the right side constitute a stepped surface.

[0031] In this embodiment, the shielding ring plate 2, the baffle ring body 105, and the resolver stator pressure plate body 1 are integrally formed. Specifically, by integrating the shielding ring plate 2, the baffle ring body 105, and the resolver stator pressure plate body 1, the connection gaps of the traditional split structure are eliminated, effectively blocking the coupling of external electromagnetic interference to the resolver signal and improving signal transmission accuracy. Furthermore, it simplifies the traditional multi-component assembly process (such as bolt fixing or welding), reduces manual intervention, and thus reduces the risk of deformation caused by accumulated tolerances in multi-component assembly, significantly enhancing overall rigidity, making it particularly suitable for high-vibration environments.

[0032] In this embodiment, combined with Figure 4 and Figure 9 As shown, the shielding ring plate 2 has an annular protrusion 202 on the side opposite to the mounting end 102; the housing 3 has an annular groove 306 at the second preset position (the second preset position refers to the position corresponding to the annular protrusion 202), and the annular protrusion 202 can be inserted into the annular groove 306, so that the resolver stator pressure plate structure is coaxial with the housing 3. Since the housing 3 and rotor spindle 301 are coaxial, and the commutator 302 and rotor spindle 301 are also coaxial, and since the annular protrusion 202 can be inserted into the annular groove 306 on the housing 3, the annular protrusion 202 and the commutator 302 are coaxial. Furthermore, since the shielding ring plate 2, the retaining ring body 105, and the resolver stator pressure plate body 1 are integrally formed, the resolver stator pressure plate structure is also coaxial with the commutator 302. Moreover, since the conductive brush 303 is mounted on the mounting ring surface 104, the conductive ring surface formed after the conductive brush 303 is mounted on the mounting ring surface 104 is coaxial with the commutator 302. This prevents uneven wear between the conductive brush 303 and the commutator 302, reduces lateral wear, and improves the service life of the conductive brush 303. Additionally, it reduces contact resistance fluctuations caused by eccentricity, lowering the risk of spark generation.

[0033] In addition, still combined Figure 4 As shown, when the annular protrusion 202 is inserted into the annular groove 306, a mounting cavity 307 for mounting the resolver stator 308 is also formed between the annular protrusion 202 and the main body of the housing 3.

[0034] In this embodiment, the outer wall of the annular protrusion 202, facing away from the shielding ring plate 2, is provided with a slope 201. Optionally, the angle of the slope 201 is set between 30° and 50°. Figure 4 And refer to Figure 5 As shown, during the process of inserting the annular protrusion 202 into the annular groove 306, the inclined surface 201 acts as a guide for the annular protrusion 202. Specifically, during the insertion of the annular protrusion 202 into the annular groove 306, the annular protrusion 202 is essentially inserted into the annular groove 306 through gradual contact. The setting of its inclination angle can decompose the radial force into an axial component, guiding the annular protrusion 202 to smoothly enter along the axial direction of the annular groove 306. In addition, rolling friction is generated when the inclined surface 201 contacts the annular groove 306, which reduces energy consumption compared to planar sliding friction and avoids deformation of the annular groove 306 caused by rigid collision.

[0035] In this embodiment, combined with Figure 6 , Figure 8 and Figure 9 As shown, the motor also includes a connecting member 309, which includes a connecting lug 310 and a connector 311. The connecting lug 310 is located between the shielding ring plate 2 and the annular protrusion 202, and protrudes from the resolver stator pressure plate body 1. The connector 311 is preferably a bolt, which passes through the connecting lug 310 and the housing 3 in sequence to fix the resolver stator pressure plate structure to the housing 3. Preferably, three connecting members 309 are provided, and the three connecting members 309 are spaced apart along the circumferential direction of the shielding ring plate 2. In actual connection, the gap between the resolver stator pressure plate body 1 and the housing 3 is controlled to be 0-0.5mm, and then the bolt tightening torque compresses the connecting lug 310 to elastically deform and press the resolver stator 308.

[0036] Example 2 This application also provides a vehicle including the aforementioned motor. It therefore possesses all the beneficial effects of a motor, which will not be specifically elaborated upon here.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A resolver stator pressure plate structure; characterized in that, include: The resolver stator pressure plate body has a mounting end and an extension end formed at both ends along the axial direction; the resolver stator pressure plate body has a mounting ring surface for mounting a conductive brush on the inner side wall near the mounting end; when the conductive brush is mounted on the mounting ring surface, a conductive ring surface is formed on the side of the conductive brush away from the mounting ring surface. A shielding ring plate is disposed at the extended end of the main body of the resolver stator pressure plate and extends toward the axial direction of the main body of the resolver stator pressure plate; the diameter of the inner sidewall of the shielding ring plate is smaller than the diameter of the conductive ring surface, such that the inner sidewall of the shielding ring plate protrudes from the conductive ring surface in the radial direction.

2. The resolver stator pressure plate structure according to claim 1, characterized in that, The main body of the resolver stator pressure plate has a retaining ring extending from the inner sidewall near the extended end toward the axial direction of the main body of the resolver stator pressure plate. The retaining ring body has a retaining surface formed on the side near the mounting ring surface.

3. The resolver stator pressure plate structure according to claim 2, characterized in that, One end of the shielding ring plate is located on the end face of the baffle ring body opposite to the baffle surface, and the other end extends toward the axial direction of the main body of the resolver stator pressure plate.

4. The resolver stator pressure plate structure according to claim 3, characterized in that, The shielding ring plate, the baffle ring body, and the main body of the resolver stator pressure plate are integrally formed.

5. The resolver stator pressure plate structure according to claim 1, characterized in that, The material of the shielding ring plate is aluminum alloy.

6. An electric motor, comprising a housing, a rotor spindle disposed within the housing, a commutator sleeved on the rotor spindle at a first predetermined position, and a conductive brush connected to the commutator; characterized in that, The motor further includes the resolver stator pressure plate structure described in any one of claims 1-5; The resolver stator pressure plate structure is sleeved on the commutator; The conductive brush is mounted on the mounting ring surface, and the conductive end of the conductive brush is connected to the commutator; When the conductive brush is installed on the mounting ring surface and connected to the commutator, the shielding ring plate overlaps with the commutator in the axial direction.

7. The motor according to claim 6, characterized in that, The shielding ring plate has an annular protrusion on the side opposite to the mounting end; The housing has an annular groove at a second preset position, and the annular protrusion can be inserted into the annular groove, so that the resolver stator pressure plate structure is coaxial with the housing; When the annular protrusion is inserted into the annular groove, a mounting cavity for mounting the resolver stator is also formed between the annular protrusion and the main body of the housing.

8. The motor according to claim 7, characterized in that, The outer side wall of the annular protrusion is inclined at the end opposite to the shielding ring plate.

9. The motor according to claim 7, characterized in that, The motor further includes a connecting member, the connecting member comprising: A connecting lug is provided between the shielding ring plate and the annular protrusion, and protrudes from the main body of the resolver stator pressure plate; The connector passes sequentially through the connecting lug and the housing to fix the resolver stator pressure plate structure to the housing.

10. A vehicle, characterized in that, Includes the motor described in any one of claims 6-9.

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