Position sensor stator assembly with conductive function

Abstract

The utility model relates to the technical field of motor accessories, and discloses a position sensor stator assembly with a conductive function, which comprises a shell, a motor end cover, a motor rotating shaft and a conductive circular ring, a plurality of through holes are annularly formed in the side part of the conductive circular ring at equal intervals, and conductive brushes fixedly penetrate through the through holes. The end portion of the conductive brush is in lap joint with a motor rotating shaft, the conductive circular ring is fixedly installed at the bottom of the shell through an assembling screw, the motor end cover is fixedly connected to the outer portion of the conductive circular ring in a sleeving mode, and a PCBA board is fixed in the shell through a pouring sealant layer. According to the utility model, the position sensor stator assembly integrates the motor rotating shaft conductive function and the position feedback function, the number of motor parts can be reduced, the internal integration degree of the motor can be improved, and the size range of the position sensor stator assembly and the conductive brush can be enlarged when the motor is designed.

Description

Technical Field

[0001] This utility model relates to the field of motor accessories technology, and more specifically, to a position sensor stator assembly with conductive function. Background Technology

[0002] An electric motor, commonly known as a motor, is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. Because motors have an uncontrollable axial voltage, conductive brushes are typically used to conduct the current. High-precision motors require position sensors to provide real-time feedback on the motor's position. Traditionally, the position sensor stator assembly and conductive brushes are mounted separately on different locations on the motor end cover. This mounting method leads to cumbersome assembly processes, affects production efficiency, and limits the dimensional range of the position sensor stator assembly and conductive brushes that can be accommodated by the traditional mounting method when designing the motor. Therefore, this invention designs a position sensor stator assembly with conductive function to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a position sensor stator assembly with conductive function to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A position sensor stator assembly with conductive function includes a housing, a motor end cover, a motor shaft, and a conductive ring. The side of the conductive ring has several through holes spaced at equal intervals in a ring shape. A conductive brush is fixedly inserted through each through hole, and the end of the conductive brush overlaps with the motor shaft. The conductive ring is fixedly installed at the bottom of the housing by mounting screws. The motor end cover is fixedly sleeved on the outside of the conductive ring. A PCBA board is fixed inside the housing by a potting adhesive layer. A position sensor sensing component is fixedly connected to the motor shaft.

[0006] As a preferred embodiment of this utility model, the number of assembly screws is two, and the two assembly screws are symmetrically distributed.

[0007] As a preferred embodiment of this utility model, the bottom surface of the conductive ring is provided with a countersunk groove, and the end cap of the mounting screw is located in the countersunk groove.

[0008] As a preferred embodiment of this utility model, a plurality of limiting protrusions are fixedly installed on the conductive ring, and the housing is in contact with the opposite sides of the limiting protrusions.

[0009] As a preferred embodiment of this utility model, the number of the limiting protrusions is at least three, and the limiting protrusions are arranged in a ring with equal intervals.

[0010] As a preferred embodiment of this utility model, the potting compound layer is a component made of silicone potting compound.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model involves creating several through holes at equal intervals in a ring on the side of a conductive ring. A conductive brush is fixedly inserted through these holes, with its end overlapping the motor shaft. The conductive ring is mounted to the bottom of the housing using mounting screws. A motor end cover is fixedly fitted onto the outside of the conductive ring. During motor operation, the axial current generated on the motor shaft is transmitted to the conductive ring via the motor shaft and finally grounded through the motor end cover, thus achieving the axial conductivity function of the motor shaft. The PCBA board is fixed inside the housing with a potting compound. The position sensor sensing component is mounted on the motor shaft. By utilizing the PCBA board and the position sensor sensing component, and employing existing eddy current position sensing technology, the position feedback function of the motor is achieved. This integrates the axial conductivity and position feedback functions of the position sensor stator assembly, reducing the number of motor parts, simplifying the overall assembly process, and ensuring efficient installation and production.

[0013] 2. This utility model can improve the degree of internal integration of the motor, so that the motor can be designed to accommodate a wider range of sizes of position sensor stator components and conductive brushes. It also helps to reduce the weight of the motor, increase the mass power density of the motor, reduce the complexity of disassembly and maintenance, and help to reduce maintenance difficulty and cost. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a position sensor stator assembly with conductive function according to the present invention.

[0015] Figure 2 This is a cross-sectional view of a position sensor stator assembly with conductive function according to the present invention.

[0016] Figure 3 This is a three-dimensional structural diagram of the stator assembly of a position sensor with conductive function after the motor end cover has been removed, according to this utility model.

[0017] Figure 4 This is a top view of the stator assembly of a position sensor with conductive function of the present invention after the motor end cover has been removed.

[0018] In the diagram: 1. Housing; 101. Encapsulating layer; 2. Motor end cover; 3. Motor shaft; 4. Conductive ring; 401. Through hole; 402. Countersunk groove; 403. Limiting protrusion; 5. Conductive brush; 6. Assembly screw; 7. PCBA board; 8. Position sensor sensing component. Detailed Implementation

[0019] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figures 1 to 4 As shown, this utility model provides a position sensor stator assembly with conductive function, including a housing 1, a motor end cover 2, a motor shaft 3, and a conductive ring 4. The side of the conductive ring 4 is provided with several through holes 401 at equal intervals in an annular shape. A conductive brush 5 is fixedly inserted through the through holes 401. The end of the conductive brush 5 overlaps with the motor shaft 3. The conductive ring 4 is fixedly installed at the bottom of the housing 1 by mounting screws 6. The motor end cover 2 is fixedly sleeved on the outside of the conductive ring 4. The motor shaft current generated during motor operation is transmitted to the conductive ring 4 through the motor shaft 3 and finally grounded through the motor end cover 2, thereby realizing the conductive function of the motor shaft. A PCBA board 7 is fixed inside the housing 1 by a potting adhesive layer 101. A position sensor sensing component 8 is fixedly connected to the motor shaft 3. The position feedback function of the motor is realized by using the PCBA board 7 and the position sensor sensing component 8 through existing eddy current position sensing technology.

[0021] Among them, such as Figure 2 As shown, there are two assembly screws 6, which are symmetrically distributed and can be used to position and assemble the conductive ring 4 before injection molding. The housing 1 and the conductive ring 4 are integrally injection molded.

[0022] Among them, such as Figure 2 As shown, the bottom surface of the conductive ring 4 has a countersunk groove 402, and the end cap of the mounting screw 6 is located in the countersunk groove 402, so that the mounting screw 6 can be hidden.

[0023] Among them, such as Figure 3 As shown, a number of limiting protrusions 403 are fixedly installed on the conductive ring 4, and the housing 1 is in contact with the opposite sides of the limiting protrusions 403.

[0024] Among them, such as Figure 4 As shown, there are at least three limiting protrusions 403, which are arranged in a ring at equal intervals. The limiting protrusions 403 can provide a stable limiting effect on the housing 1.

[0025] Among them, such as Figure 2 As shown, the potting compound layer 101 is a component made of silicone, polyurethane or epoxy resin potting compound.

[0026] The working principle of this utility model:

[0027] By opening several through holes 401 at equal intervals in a ring on the side of the conductive ring 4, a conductive brush 5 is fixedly inserted through the through holes 401, and the end of the conductive brush 5 is connected to the motor shaft 3. The conductive ring 4 is installed on the bottom of the housing 1 by mounting screws 6. The motor end cover 2 is fixedly sleeved on the outside of the conductive ring 4. The motor shaft current generated during motor operation is transmitted to the conductive ring 4 through the motor shaft 3 and finally grounded through the motor end cover 2, thereby realizing the motor shaft conduction function. The PCBA board 7 is fixed in the housing 1 by the potting adhesive layer 101. The position sensor sensing component 8 is set on the motor shaft 3. The position feedback function of the motor is realized by using the PCBA board 7 and the position sensor sensing component 8 through the existing eddy current position sensing technology, so that the position sensor stator assembly integrates the motor shaft conduction and position feedback functions.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A position sensor stator assembly with conductive function, characterized in that: It includes a housing (1), a motor end cover (2), a motor shaft (3), and a conductive ring (4); The conductive ring (4) has several through holes (401) spaced out in an annular pattern on its side. A conductive brush (5) is fixedly inserted through the through hole (401), and the end of the conductive brush (5) is connected to the motor shaft (3). The conductive ring (4) is fixedly installed at the bottom of the housing (1) by mounting screws (6). The motor end cover (2) is fixedly sleeved on the outside of the conductive ring (4). A PCBA board (7) is fixed inside the housing (1) by a potting adhesive layer (101). A position sensor sensing component (8) is fixedly connected to the motor shaft (3).

2. The position sensor stator assembly with conductive function according to claim 1, characterized in that: The number of assembly screws (6) is two, and the two assembly screws (6) are symmetrically distributed.

3. The position sensor stator assembly with conductive function according to claim 2, characterized in that: The bottom surface of the conductive ring (4) is provided with a countersunk groove (402), and the end cap of the mounting screw (6) is located in the countersunk groove (402).

4. The position sensor stator assembly with conductive function according to claim 1, characterized in that: A plurality of limiting protrusions (403) are fixedly installed on the conductive ring (4), and the housing (1) is in contact with the opposite side of the limiting protrusions (403).

5. A position sensor stator assembly with conductive function according to claim 4, characterized in that: The number of the limiting protrusions (403) is at least three, and the limiting protrusions (403) are arranged in a ring with equal intervals.

6. The position sensor stator assembly with conductive function according to claim 1, characterized in that: The potting compound layer (101) is a component made of silicone, polyurethane or epoxy resin potting compound.

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