Eddy current stator and electric machine

Abstract

The utility model belongs to motor sensor field, especially relates to a kind of electric eddy current stator and the motor with the electric eddy current stator;Electric eddy current stator, it includes stator shell, the stator shell is equipped with electric eddy current PCB board in, the surface of the stator shell is equipped with sealing ring body, the sealing ring body is used to embed the mounting hole of motor shell and form sealing with mounting hole, connecting hole is equipped on the stator shell around sealing ring body, the stator shell around sealing ring body is closely attached with motor shell and is connected with motor shell by fastener through connecting hole;The utility model has carried out improvement to electric eddy current stator, directly utilizes the stator shell of electric eddy current stator to carry out sealing to the mounting hole of motor shell, reduces the material of product, and need not wear cylinder piece, improves the reliability of product, simultaneously, wiring terminal is convenient to adopt general interface design, reduces adaptation cost.

Description

Technical Field

[0001] This utility model belongs to the field of motor sensors, and specifically relates to an eddy current stator and a motor having the eddy current stator. Background Technology

[0002] Currently, the existing automotive eddy current sensor used for detecting the rotor angle of automobiles and the position of the propeller blades of flying cars, CN223166150U, is an automotive eddy current dual-redundant Hall sensor. This sensor discloses an eddy current sensor comprising a housing, which is annular in shape and has a mounting cavity. A ring-shaped circuit board is located within the mounting cavity and connected to a wiring harness assembly. A sealing layer is located above the circuit board within the mounting cavity. A downwardly extending lower cylinder is located on the lower side of the housing, and a Hall sensor is located inside the lower cylinder, correspondingly connected to the circuit board. In this prior art, the housing is a thin sheet with a mounting cavity, installed inside the motor. A separate end cap is needed to seal the motor's tail end, and signal connection to external devices is achieved through the wiring harness assembly. The wiring harness assembly passing through the end cap requires a cylinder-penetrating component, resulting in a larger material quantity, increased product cost, and a potential for leakage. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention improves the eddy current stator by directly using the stator housing of the eddy current stator to seal the mounting holes of the motor housing, reducing the material requirements of the product and eliminating the need for cylinder parts, thus improving product reliability. At the same time, the wiring terminals are designed with universal interfaces, reducing adaptation costs.

[0004] The technical solution of this utility model is as follows: An eddy current stator, comprising a stator housing, characterized in that: an eddy current PCB board is provided inside the stator housing, a sealing ring is provided on the surface of the stator housing, the sealing ring is used to be embedded in the mounting hole of the motor housing and form a seal with the mounting hole, and a connecting hole is provided on the stator housing around the sealing ring, the stator housing around the sealing ring is in close contact with the motor housing and is connected to the motor housing through the connecting hole by fasteners.

[0005] Furthermore, the sealing ring has an open lower cavity, the eddy current PCB board is installed in the cavity and fixed with glue, and the stator housing has a terminal block on the side away from the sealing ring, the terminal block is connected to the eddy current PCB board.

[0006] Furthermore, the sealing ring has an open lower cavity, and the stator housing at the end away from the sealing ring has an open upper cavity. The upper cavity and the lower cavity are coaxially arranged, and a spacer assembly is formed between the upper cavity and the lower cavity. The eddy current PCB board is disposed in the upper cavity and is in close contact with the spacer assembly. The system also includes an upper cover plate, which is installed in the upper cavity to fix the eddy current PCB board.

[0007] Furthermore, the spacer assembly is a spacer plate formed between the upper cavity and the lower cavity.

[0008] Furthermore, the aforementioned spacer assembly consists of several supporting arc-shaped plates formed between the upper cavity and the lower cavity. These supporting arc-shaped plates are distributed in a circular pattern, and the eddy current PCB board is installed in the upper cavity and supported by the supporting arc-shaped plates.

[0009] Furthermore, a metal sleeve is provided inside the connection hole.

[0010] Furthermore, the stator housing is made of plastic injection molding.

[0011] Furthermore, the outer circumferential surface of the sealing ring body is provided with at least one mounting groove, and the sealing ring is provided in the mounting groove.

[0012] An electric motor includes a motor housing with mounting holes corresponding to the motor shaft end, and also includes an eddy current stator as described above, which is connected to the motor housing and seals the mounting holes.

[0013] In summary, this utility model has the following technical effects: This invention improves upon the eddy current stator. Specifically, a sealing ring is added to the stator housing of the eddy current stator. The sealing ring engages with the mounting hole on the motor housing to form a seal. The eddy current rotor is mounted on the motor shaft and located within the mounting hole. After the eddy current stator is assembled with the motor housing, the eddy current stator and rotor cooperate to detect the motor speed. The eddy current stator of this invention directly seals the end of the motor housing, eliminating the need for additional end caps, thus reducing material costs. Furthermore, it eliminates the need for the cylinder-penetrating component that passes through the end cap, solving the leakage problem inherent in existing cylinder-penetrating components. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the eddy current stator of this utility model; Figure 2 This is a cross-sectional schematic diagram of an embodiment of the eddy current stator of this utility model; Figure 3 This is a perspective view of another embodiment of the eddy current stator of this utility model; Figure 4 This is a cross-sectional schematic diagram of another embodiment of the eddy current stator of this utility model; Figure 5 This is a cross-sectional schematic diagram of another embodiment of the eddy current stator of this utility model; Figure 6 This is a three-dimensional schematic diagram of the motor of this utility model; Figure 7 This is a cross-sectional schematic diagram of the motor of this utility model; In the diagram, 1 represents the stator housing, 11 represents the sealing ring body, 12 represents the connecting hole, 120 represents the metal jacket, 114 represents the mounting groove, and 115 represents the sealing ring. 110 is the lower cavity, 111 is the upper cavity, 112 is the spacer assembly, and 113 is the upper cover plate. 1120 is a partition plate, and 1121 is a supporting curved plate. 2 is an eddy current PCB board. 3 is the wiring terminal, and 4 is the adhesive layer. 5 represents the motor housing, 50 represents the mounting hole, and 6 represents the eddy current stator. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0016] It should be noted that when a component is referred to as being "set on" or "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as being "fixed to" another component, or "fixedly connected" to another component, the fixing method can be detachable or non-detachable. When a component is considered to be "connected" or "rotatably connected" to another component, it can be directly connected to the other component or there may be an intermediate component. The terms "vertical," "horizontal," "left," "right," "upper," "lower," and similar expressions used are for illustrative purposes only and do not represent the only possible implementation.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0018] In this invention, terms such as "first," "second," and "third" are used not to represent specific quantities or orders, but merely to distinguish names.

[0019] See Figure 1 As shown, an eddy current stator includes a stator housing 1, an eddy current PCB board 2 is provided inside the stator housing 1, and a sealing ring 11 is provided on the surface of the stator housing 1. The sealing ring 11 is used to embed into the mounting hole of the motor housing and form a seal with the mounting hole. The stator housing 1 around the sealing ring 11 is provided with connecting holes 12. The stator housing 1 around the sealing ring 11 is in close contact with the motor housing and is connected to the motor housing through the connecting holes by fasteners.

[0020] This invention improves upon the eddy current stator. Specifically, a sealing ring is added to the stator housing of the eddy current stator. The sealing ring engages with the mounting hole on the motor housing to form a seal. The eddy current rotor is mounted on the motor shaft and located within the mounting hole. After the eddy current stator is assembled with the motor housing, the eddy current stator and rotor cooperate to detect the motor speed. The eddy current stator of this invention directly seals the end of the motor housing, eliminating the need for additional end caps, thus reducing material costs. Furthermore, it eliminates the need for the cylinder-penetrating component that passes through the end cap, solving the leakage problem inherent in existing cylinder-penetrating components.

[0021] The sealing ring 11 has an open lower cavity 110. The eddy current PCB board 2 is installed in the cavity and fixed with glue. The stator housing has a terminal block 3 on the side away from the sealing ring. The terminal block 3 is connected to the eddy current PCB board. In a further embodiment of the present invention, the sealing ring has an open cavity facing the motor shaft. The eddy current PCB board is placed in the cavity and fixed with glue. The glue injection forms a glue layer 4. The glue injection not only fixes the eddy current PCB board, but also provides a seal to prevent the leakage of oil inside the motor. In this embodiment, the connection terminal has pins to connect with the eddy current PCB board. The connection terminal adopts a universal connection terminal for easy plugging with external devices.

[0022] Furthermore, in one embodiment of this utility model, a lower cavity 110 with an opening is formed inside the sealing ring body 11, and an upper cavity 111 with an opening is provided at one end of the stator housing 1 away from the sealing ring body. The upper cavity 111 and the lower cavity 110 are coaxially arranged, and a spacer assembly 112 is formed between the upper cavity and the lower cavity. The eddy current PCB board is disposed in the upper cavity and closely attached to the spacer assembly. An upper cover plate 113 is also included. The upper cover plate is installed in the upper cavity to fix the eddy current PCB board. Here, the eddy current stator is improved. Specifically, the position of the eddy current PCB board is improved. The eddy current PCB board is placed in the upper cavity of the stator housing and supported by the spacer assembly. Then it is fixed by the upper cover plate, which facilitates assembly and disassembly and maintenance after assembly. The spacer assembly is used to separate the upper cavity and the lower cavity.

[0023] This embodiment provides two different structural forms for the spacer assembly. Here is the first one. The spacer assembly 112 is a spacer plate 1120 formed between the upper cavity and the lower cavity. The spacer plate is located at the connection between the upper cavity and the lower cavity and is connected to the walls of the upper cavity and the lower cavity, forming a physical isolation between the two cavities.

[0024] The second structural form is given here. The spacer component 112 is a plurality of supporting arc-shaped plates 1121 formed between the upper cavity and the lower cavity. The plurality of supporting arc-shaped plates are distributed in a circle. The eddy current PCB board is installed in the upper cavity and supported by the supporting arc-shaped plates. In addition, glue needs to be injected into the lower cavity to form a seal.

[0025] The connecting hole 12 is provided with a metal sleeve 120. The metal sleeve is provided to improve the structural strength of the stator housing. When the fastener acts on the stator housing, the metal sleeve acts as the main force-bearing component to ensure that the stator housing will not be damaged by pressure.

[0026] The stator housing 1 is made of plastic injection molding and is processed from high-temperature resistant plastics, such as polyphenylene sulfide and polyether ether ketone, to meet the high-temperature environment of motor operation.

[0027] The sealing ring body 11 has at least one mounting groove 114 on its outer circumferential surface. The mounting groove 114 is provided with a sealing ring 115. The sealing ring is provided to improve the sealing effect between the sealing ring body and the wall of the mounting hole of the motor housing, so as to ensure that the motor meets the protection level requirements.

[0028] The motor includes a motor housing 5, on which a mounting hole 50 corresponding to the end of the motor shaft is provided, and also includes an eddy current stator 3 as described above, which is connected to the motor housing and seals the mounting hole 50.

[0029] In summary, this utility model has the following technical effects: This invention improves upon the eddy current stator. Specifically, a sealing ring is added to the stator housing of the eddy current stator. The sealing ring engages with the mounting hole on the motor housing to form a seal. The eddy current rotor is mounted on the motor shaft and located within the mounting hole. After the eddy current stator is assembled with the motor housing, the eddy current stator and rotor cooperate to detect the motor speed. The eddy current stator of this invention directly seals the end of the motor housing, eliminating the need for additional end caps, thus reducing material costs. Furthermore, it eliminates the need for the cylinder-penetrating component that passes through the end cap, solving the leakage problem inherent in existing cylinder-penetrating components.

[0030] Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. An eddy current stator, comprising a stator housing, characterized in that: The stator housing contains an eddy current PCB board, and the surface of the stator housing is provided with a sealing ring. The sealing ring is used to embed into the mounting hole of the motor housing and form a seal with the mounting hole. The stator housing around the sealing ring is provided with a connecting hole. The stator housing around the sealing ring is in close contact with the motor housing and is connected to the motor housing through the connecting hole by fasteners.

2. The eddy current stator according to claim 1, characterized in that: The sealing ring has an open lower cavity, the eddy current PCB board is installed in the cavity and fixed with glue, and the stator housing has a terminal block on the side away from the sealing ring, which is connected to the eddy current PCB board.

3. The eddy current stator according to claim 1, characterized in that: The sealing ring has an open lower cavity, and the stator housing at one end away from the sealing ring has an open upper cavity. The upper cavity and the lower cavity are coaxially arranged, and a spacer assembly is formed between the upper cavity and the lower cavity. The eddy current PCB board is disposed in the upper cavity and is in close contact with the spacer assembly. The system also includes an upper cover plate, which is installed in the upper cavity to fix the eddy current PCB board.

4. The eddy current stator according to claim 3, characterized in that: The spacer assembly is a spacer plate formed between the upper cavity and the lower cavity.

5. The eddy current stator according to claim 3, characterized in that: The aforementioned spacer consists of several supporting arc-shaped plates formed between the upper cavity and the lower cavity. These supporting arc-shaped plates are distributed in a circular pattern. The eddy current PCB board is installed in the upper cavity and supported by the supporting arc-shaped plates.

6. The eddy current stator according to claim 1, characterized in that: The connection hole is equipped with a metal sleeve.

7. The eddy current stator according to claim 1, characterized in that: The stator housing is made of plastic injection molding.

8. The eddy current stator according to any one of claims 1-7, characterized in that: The outer circumferential surface of the sealing ring body is provided with at least one mounting groove, and the sealing ring is provided in the mounting groove.

9. An electric motor, comprising a motor housing, characterized in that: The motor housing is provided with mounting holes corresponding to the motor shaft end, and also includes an eddy current stator as described in any one of claims 1-8, wherein the eddy current stator is connected to the motor housing and seals the mounting holes.

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