Motor

Abstract

The invention provides a motor which comprises a shell, a stator part, a rotor part and a rotating shaft, at least part of the stator part is located in the shell, at least part of the rotor part is located in the shell, the stator part is connected with the shell, and the rotor part is connected with the rotating shaft; the motor comprises a driving integration part, the driving integration part and the shell are arranged in the radial direction of the rotating shaft, the motor comprises an induction piece, and the induction piece is connected with the rotating shaft; the driving integration part comprises a control module and a detection module, the control module is electrically connected with the stator part, and at least part of the detection module and the induction part are arranged in the radial direction of the rotating shaft. According to the motor, the driving integration part is connected with the shell in the radial direction of the rotating shaft, and the driving module comprises the control module and the detection module, so that the control module and the detection module are both located on one side of the shell in the radial direction, and the overall size of the motor in the axial direction is reduced.

Description

Technical Field

[0001] This application relates to the field of electric motors, and more particularly to electric motor drive modules. Background Technology

[0002] In related technologies, a motor includes a stator, a rotor, a shaft, and a control module. The stator and control module are electrically connected, while the rotor and shaft are fixedly connected. To detect the rotation of the shaft or rotor, a monitoring device is usually installed on the motor. This monitoring device includes a receiver and a generator; the generator, receiver, and control module are arranged sequentially along the axial direction of the shaft. This increases the overall axial dimension of the motor. Summary of the Invention

[0003] This application provides a motor capable of reducing its size in the axial direction.

[0004] This application provides an electric motor, including a housing, a stator, a rotor, and a shaft. The stator is at least partially located within the housing, the rotor is at least partially located within the housing, the stator is connected to the housing, and the rotor is connected to the shaft.

[0005] The motor includes a drive integration unit, which is arranged along the radial direction of the rotating shaft with the housing. The motor includes a sensor connected to the rotating shaft. The drive integration unit includes a control module and a detection module. The control module is electrically connected to the stator. The detection module is at least partially arranged along the radial direction of the rotating shaft with the sensor.

[0006] In this application, the drive integration unit and the housing are arranged radially in the radial direction of the rotating shaft. The drive module includes a control module and a detection module, so that the control module and the detection module are both located on one side of the housing in the radial direction, thereby reducing the overall size of the motor in the axial direction. Attached Figure Description

[0007] Figure 1 This is a three-dimensional schematic diagram of the motor structure in this application;

[0008] Figure 2 This is a schematic diagram of the structure for removing the adhesive sealant layer from the motor in this application;

[0009] Figure 3 This is an exploded view of the motor structure in this application;

[0010] Figure 4 This is a cross-sectional view of the motor structure in this application;

[0011] Figure 5 for Figure 4 Enlarged view of circle A in the middle;

[0012] Figure 6 This is an exploded cross-sectional view of the motor structure in this application;

[0013] Figure 7 This is a schematic diagram of the drive integration unit structure in this application. Detailed Implementation

[0014] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0015] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0016] For ease of understanding, the features described in the related technologies will be given the same or similar names as the technical features in this application, so as to facilitate understanding of the difference between this application and related technologies. Similarly, to facilitate the distinction between the technical features of this application and the technical features of related technologies, the technical features in related technologies are not marked with reference numerals.

[0017] In related technologies, a motor includes a stator, a rotor, a shaft, and a control module. The stator is fixedly connected to the motor housing and electrically connected to the control module. The rotor is connected to the shaft. When an external power source is connected, the stator generates a magnetic field, which drives the rotor to rotate through magnetic force, thereby causing the shaft to rotate. To monitor the rotation of the shaft or rotor, a monitoring device is installed. This device includes a receiver and a generator. The generator, receiver, and control module are arranged along the axial direction of the shaft. The generator is connected to the shaft, and the receiver is connected to the motor end cover to monitor the rotation of the shaft in the axial direction. The control module is also connected axially to the motor end cover or motor housing to control the motor. However, this results in a relatively large axial dimension for the motor, which causes many inconveniences in the overall assembly of the motor and its connection with other components.

[0018] This application provides a motor, such as Figures 1 to 7 As shown, its specific structure includes a housing 1, a stator 2, a rotor 3, and a rotating shaft 4. The stator 2 is at least partially located inside the housing 1, and the rotor 3 is at least partially located inside the housing 1. The stator 2 is connected to the housing 1, and the rotor 3 is connected to the rotating shaft 4. The motor includes a drive integration unit 5, which is connected to the housing 1 in the radial direction of the rotating shaft 4. The motor includes a sensor 6, which is connected to the rotating shaft 4. The drive integration unit 5 includes a control module 501 and a detection module 502. The control module 501 is electrically connected to the stator 2, and the detection module 502 is at least partially arranged with the sensor 6 in the radial direction of the rotating shaft 4.

[0019] The control module 501 and the detection module 502 constitute part of the drive integration unit 5. In the radial direction of the rotating shaft 4, the drive integration unit 5 is connected to one side of the housing 1, so that the control module 501 and the detection module 502 are located on one side of the housing 1 in the radial direction, thereby reducing the space occupied by the control module 501 and the detection module 502 in the axial direction.

[0020] In practical applications, when the rotating shaft 4 rotates, it drives the sensing element 6 to rotate as well. During the rotation, the detection module 502 is opposite to the sensing element 6 in the radial direction, and can detect the change of the sensing element 6 when the rotating shaft 4 rotates, thereby detecting the rotation of the rotating shaft 4 or the rotor 3. The detection module 502 and the sensing element 6 constitute a monitoring device to monitor the rotation of the rotating shaft 4 or the rotor 3.

[0021] By placing the drive integration unit 5 on one side of the housing 1 in the radial direction, the overall axial dimension of the motor is reduced, and the overall wiring of the motor is also optimized. The control module 501 and the detection module 502 are both located on one side of the housing 1 in the radial direction. Looking radially from the center line of the rotating shaft 4, the detection module 502 is opposite to the sensing element 6, and the control module 501 is opposite to the stator 2. The connecting lines can be directly connected in the radial direction, corresponding one-to-one in the radial direction, which is not only more convenient, but also shortens the wiring path.

[0022] If the arrangement method in the relevant technology is adopted, and the detection module 502 and the control module 501 are arranged along the axial direction of the rotating shaft 4, when the detection module 502 cooperates with the sensing element 6 for detection, a certain space interval needs to be left in the axial direction so that the two will not contact or interfere. Then, the control module 501 is set on the end cover 13 or the housing 1 on one side of the detection module 502 along the axial direction. However, this not only increases the size in the axial direction, but also makes the line connecting the stator part 2 and the control module 501 longer. Moreover, it needs to pass through the sensing element 6 and the detection module 502 in the axial direction, which will also cause inconvenience in the subsequent maintenance process.

[0023] Specifically, the drive integration unit 5 includes an electronic control board 500, a control module 501 electrically connected to the electronic control board 500, a detection module 502 electrically connected to the electronic control board 500, and the electronic control board 500 connected to the housing 1.

[0024] The drive integration unit 5 includes a power module 503 and a communication module 504, both of which are electrically connected to the electronic control board 500.

[0025] The detection module 502 and control module 501 are connected to the same control board 500, which not only improves the integration of the entire motor drive control but also enhances the ease of assembly. Integrating the power module 503 and communication module 504 onto the control board 500 further improves integration and assembly convenience. The specific arrangement of the detection module 502, control module 501, power module 503, and communication module 504 on the control board 500 can be rationally arranged and laid out according to the actual application scenario, thereby optimizing the overall wiring of the motor and improving space utilization. For example, by aligning the control module 501 with the stator 2 in the radial direction, the relative position of the control module 501 on the control board 500 can be determined by the position of the stator 2, allowing for direct radial connection of the wiring between them with a shorter path. The rational layout of the components in the drive integration unit 5 not only improves the overall integration and space utilization of the motor but also enhances the overall performance of the motor to a certain extent.

[0026] The drive integration unit 5 includes a displacement sensing module 505, which is electrically connected to the electronic control board 500. The motor in this application can be integrated with an external actuator to convert rotary motion into linear motion. The displacement sensing module 505 can monitor the displacement of relevant components within the actuator. The connection between the displacement sensing module 505 and the electronic control board 500 further improves integration and facilitates the overall assembly of the motor. The displacement sensing module 505 is positioned closer to the integrated actuator on the electronic control board 500 than other modules, reducing wiring distance, improving response speed, and ultimately enhancing motor performance.

[0027] The housing 1 includes a connecting part 101, the electronic control board 500 is fixedly connected to the connecting part 101, and there is a receiving cavity 7 between the housing 1 and the electronic control board 500. The control module 501 is at least partially located in the receiving cavity 7, and the detection module 502 is at least partially located in the receiving cavity 7.

[0028] In the specific connection, the electronic control board 500 and the connecting part 101 can be fixed in relative position by means of bolts or adhesive. After connection, a receiving cavity 7 is formed between the electronic control board 500 and the housing 1. The control module 501 and the detection module 502 can be assembled in the receiving cavity 7, and the power module 503 and the communication module 504 can also be assembled in the receiving cavity 7. This can provide protection for each module and prevent external collisions, etc.

[0029] Furthermore, such as Figure 3As shown, the housing 1 has a detection port 102 and an inner cavity 103. The detection port 102 can connect the inner cavity 103 and the receiving cavity 7. A portion of the detection module 502 is located in the receiving cavity 7, and a portion of the detection module 502 is located in the detection port 102.

[0030] The detection port 102 facilitates the detection module 502's sensing of the sensor 6. The detection module 502 is connected to the electronic control board 500, which is located outside the housing 1. In one embodiment, the entire detection module 502 is located outside the housing 1. In another embodiment, part of the detection module 502 is located outside the housing 1, and part is located at the detection port 102, allowing it to extend into the housing 1. Both embodiments can be applied according to the specific application scenario. The detection port 102 improves the sensing coordination between the detection module 502 and the sensor 6, thereby increasing the detection accuracy.

[0031] like Figures 4 to 6 As shown, the sensing element 6 includes a magnetic ring 601 and a bracket 602. The magnetic ring 601 is connected to the rotating shaft 4, and the bracket 602 is connected to the rotating shaft 4. Along the radial direction of the rotating shaft 4, the magnetic ring 601 and the detection module 502 are arranged at intervals, and the magnetic ring 601 is at least partially opposite to the detection module 502.

[0032] More specifically, the sensing element 6 is mainly detected by the detection module 502 through the magnetic field generated by the magnetic ring 601. When the rotating shaft 4 rotates, it will drive the magnetic ring 601 to rotate together, thereby changing the magnetic field. The detection module 502 will then sense and monitor the rotation of the rotating shaft 4 or the rotor 3 based on the change in the magnetic field.

[0033] The motor includes a first bearing housing 8 and a first bearing 9. The first bearing housing 8 is connected to the inner wall of the housing 1. The outer ring of the first bearing 9 is connected to the first bearing housing 8. The inner ring of the first bearing 9 is connected to the rotating shaft 4. In the axial direction of the rotating shaft 4, the magnetic ring 601 and the rotor part 3 are respectively located on both sides of the first bearing housing 8. The bracket 602 is located between the magnetic ring 601 and the inner ring of the first bearing 9.

[0034] The first bearing housing 8 has a mounting cavity 801, and the first bearing 9 is at least partially located in the mounting cavity 801. The wall constituting the mounting cavity 801 has a mounting groove 802. The motor includes a washer 803, which is partially located in the mounting groove 802 and abuts against the outer ring of the first bearing 9.

[0035] The motor includes a second bearing housing 10 and a second bearing 11. The second bearing housing 10 is connected to the inner wall of the housing 1. The outer ring of the second bearing 11 is connected to the second bearing housing 10. The inner ring of the second bearing 11 is connected to the rotating shaft 4. In the axial direction of the rotating shaft 4, the first bearing housing 8 and the second bearing housing 10 are located at the two ends of the rotating shaft 4, respectively.

[0036] The first bearing 9 and the second bearing 11 are used to support the two ends of the rotating shaft 4, respectively. The sensing element 6, which is composed of the magnetic ring 601 and the bracket 602, is located outside the first bearing 9, thereby reducing the overall length of the support distance between the first bearing 9 and the second bearing 11, and thus reducing the overall loss of the motor.

[0037] like Figure 4 As shown, if the sensing element 6 is located inside the first bearing 9, that is, between the first bearing 9 and the second bearing 11, the position of the first bearing 9 needs to be moved outward along the axial direction to leave enough space for the sensing element 6 to be installed, while the length of other components remains unchanged. However, this will also increase the distance between the first bearing 9 and the second bearing 11, thereby increasing the distance between the support systems of the first bearing 9 and the second bearing 11, which will result in greater overall motor losses and is not conducive to the overall manufacturing of the motor.

[0038] The washer 803 allows for adaptive adjustment of the rotor section 3's position, thereby improving the overall efficiency of the motor. During manufacturing, tolerances exist between components, leading to concentricity deviations after assembly, which can reduce motor efficiency. The washer 803, being elastic, abuts against the outer ring of the first bearing 9 after being installed in the mounting slot 802. During operation, the stator section 2 and rotor section 3 cooperate, with the rotor section 3 tending to run along the central axis of the stator section 2 during continuous rotation. If concentricity is insufficient due to manufacturing or assembly issues, the washer 803 can undergo elastic deformation, allowing the rotor section 3 or shaft 4 to have a certain radial displacement. This ensures the rotor section 3 runs along the central axis of the stator section 2, thus improving the overall motor efficiency even with insufficient concentricity.

[0039] The motor includes an adhesive layer 12, part of which is located in the receiving cavity 7 and part of which is located on the side of the control board 500 away from the rotating shaft 4.

[0040] The sealant layer 12 can protect the various modules in the motor on the one hand, and make the connection of the drive integration unit 5 more stable on the other hand, thus improving the overall integrity of the motor.

[0041] The above embodiments are only used to illustrate this application and are not intended to limit the technical solutions described in this application. The understanding of this specification should be based on those skilled in the art. For example, directional descriptions such as "front", "back", "left", "right", "up", and "down" are only used to describe the relationship between objects and are not substantial limitations. "Multiple" means at least two or more.

[0042] Although this specification has described the present application in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present application, and all technical solutions and improvements that do not depart from the spirit and scope of the present application should be covered within the scope of the claims of the present application.

Claims

1. An electric motor, characterized in that, It includes a housing (1), a stator (2), a rotor (3) and a shaft (4), wherein the stator (2) is at least partially located inside the housing (1), the rotor (3) is at least partially located inside the housing (1), the stator (2) is connected to the housing (1), and the rotor (3) is connected to the shaft (4); The motor includes a drive integration unit (5), which is arranged with the housing (1) along the radial direction of the rotating shaft (4). The motor includes a sensor (6), which is connected to the rotating shaft (4). The drive integration unit (5) includes a control module (501) and a detection module (502). The control module (501) is electrically connected to the stator (2). The detection module (502) is at least partially arranged with the sensor (6) along the radial direction of the rotating shaft (4).

2. The motor according to claim 1, characterized in that, The drive integration unit (5) includes an electronic control board (500), the control module (501) is electrically connected to the electronic control board (500), the detection module (502) is electrically connected to the electronic control board (500), and the electronic control board (500) is connected to the housing (1).

3. The motor according to claim 2, characterized in that, The drive integration unit (5) includes a power module (503) and a communication module (504), both of which are electrically connected to the electronic control board (500).

4. The motor according to claim 2 or 3, characterized in that, The housing (1) includes a connecting part (101), the electronic control board (500) is fixedly connected to the connecting part (101), and there is a receiving cavity (7) between the housing (1) and the electronic control board (500). The control module (501) is at least partially located in the receiving cavity (7), and the detection module (502) is at least partially located in the receiving cavity (7).

5. The motor according to claim 4, characterized in that, The housing (1) has a detection port (102) and an inner cavity (103). The detection port (102) can connect the inner cavity (103) and the receiving cavity (7). A portion of the detection module (502) is located in the receiving cavity (7), and a portion of the detection module (502) is located in the detection port (102).

6. The motor according to claim 1 or 5, characterized in that, The sensing element (6) includes a magnetic ring (601) and a bracket (602). The magnetic ring (601) is connected to the rotating shaft (4), and the bracket (602) is connected to the rotating shaft (4). Along the radial direction of the rotating shaft (4), the magnetic ring (601) and the detection module (502) are arranged at intervals, and the magnetic ring (601) is at least partially opposite to the detection module (502).

7. The motor according to claim 6, characterized in that, The motor includes a first bearing housing (8) and a first bearing (9). The first bearing housing (8) is connected to the inner wall of the housing (1). The outer ring of the first bearing (9) is connected to the first bearing housing (8). The inner ring of the first bearing (9) is connected to the rotating shaft (4). In the axial direction of the rotating shaft (4), the magnetic ring (601) and the rotor (3) are respectively located on both sides of the first bearing seat (8), and the bracket (602) is located between the magnetic ring (601) and the inner ring of the first bearing (9).

8. The motor according to claim 7, characterized in that, The first bearing housing (8) has a mounting cavity (801), the first bearing (9) is at least partially located in the mounting cavity (801), the wall constituting the mounting cavity (801) has a mounting groove (802), the motor includes a washer (803), the washer (803) is partially located in the mounting groove (802), and the washer (803) abuts against the outer ring of the first bearing (9).

9. The motor according to claim 7 or 8, characterized in that, The motor includes a second bearing housing (10) and a second bearing (11). The second bearing housing (10) is connected to the inner wall of the housing (1). The outer ring of the second bearing (11) is connected to the second bearing housing (10). The inner ring of the second bearing (11) is connected to the rotating shaft (4). In the axial direction of the rotating shaft (4), the first bearing housing (8) and the second bearing housing (10) are located at both ends of the rotating shaft (4).

10. The motor according to claim 4, characterized in that, The motor includes an adhesive layer (12), which is partially located in the receiving cavity (7) and partially located on the side of the control board (500) away from the rotating shaft (4).

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