electric machine

Abstract

The application discloses a motor. The motor comprises a motor body and a terminal block. The motor body comprises a motor shell, wherein the motor shell is provided with a first cavity and a first connecting hole, and the first connecting hole is communicated with the first cavity; the terminal block comprises a terminal block body, a three-phase terminal block and a terminal; wherein the terminal block body is provided with a second cavity and a second connecting hole, the first connecting hole is communicated with the second cavity, the terminal block body is installed outside the motor shell and covers and seals the first connecting hole, the second connecting hole is communicated with the first connecting hole; the three-phase terminal block is integrally arranged on the terminal block body, and the three-phase terminal block has a first terminal segment located in the second cavity and a second terminal segment located outside the second cavity; and the terminal is connected to the second terminal segment. The motor of the application solves the problem that the three-phase terminal block of the motor in the prior art is prone to insulation failure.

Description

Technical Field

[0001] This application relates to the field of drive device technology, and more specifically, to an electric motor. Background Technology

[0002] Condensation inside the motor's junction box can affect the motor's normal operation. In related technologies, to avoid condensation in the junction box, a structure is typically used that isolates the junction box from the motor housing. In this structure, the three-phase wires pass through wiring holes on the junction box into the motor housing. Gaps inevitably exist between the wires. When hot air from inside the motor housing enters the junction box through these gaps, condensation occurs when this hot air comes into contact with the cold air inside the junction box. Insulation failures can easily occur at the exposed three-phase wire terminals inside the junction box, thus adversely affecting the motor's normal operation. Summary of the Invention

[0003] The main objective of this application is to provide a motor that solves the problem of insulation failure easily occurring at the three-phase wire terminal locations of motors in the prior art.

[0004] According to one aspect of this application, an electric motor is provided, comprising:

[0005] The motor body includes a motor housing, on which a first cavity and a first connecting hole are provided, and the first connecting hole communicates with the first cavity.

[0006] A junction box, comprising a junction box body, a three-phase terminal block, and terminal blocks;

[0007] The terminal block body is provided with a second cavity and a second connecting hole. The first connecting hole communicates with the second cavity. The terminal block body is installed on the outside of the motor housing and covers and seals the first connecting hole. The second connecting hole communicates with the first connecting hole.

[0008] The three-phase terminal block is integrally disposed on the terminal block body, and the three-phase terminal block has a first terminal section located inside the second cavity and a second terminal section located outside the second cavity;

[0009] The terminal block is connected to the second terminal segment.

[0010] Furthermore, the three-phase terminal block and the terminal block body are connected as one unit by a rubber injection molding method.

[0011] Furthermore, the three-phase terminal block also includes an injection-molded section embedded in the main body of the terminal block. The injection-molded section consists of two segments, which are located at the two ends of the second terminal block so that the second terminal block is suspended in the second cavity.

[0012] Furthermore, the terminal block is detachably connected to the second terminal segment via a locking assembly.

[0013] Furthermore, the locking assembly includes:

[0014] A locking screw, which passes through the second terminal segment;

[0015] A locking nut is embedded in the terminal block and has a threaded hole that matches the locking screw.

[0016] Furthermore, the terminal block includes a horizontal section and a terminal head, the locking nut is embedded in the horizontal section, and the terminal head is connected to one end of the horizontal section and forms an angle A with the horizontal section, wherein 0° < A < 180°.

[0017] Furthermore, the terminal head extends at least partially into the first connection hole.

[0018] Furthermore, the terminal block body includes:

[0019] The bottom shell has a second cavity and an opening, the second connecting hole is located at the bottom of the bottom shell, the opening communicates with the second cavity, and the three-phase terminal block is integrally formed with the bottom shell;

[0020] A top cover is disposed on the bottom shell and seals the opening.

[0021] Furthermore, the upper cover is disposed against the second wiring segment, and the upper cover is provided with a relief groove to avoid the locking screw.

[0022] Furthermore, a first sealing layer is provided between the terminal block body and the motor housing; and / or,

[0023] A second sealing layer is provided between the bottom shell and the top cover.

[0024] In this application, after the terminal block is installed on the motor housing, the second cavity on the terminal block and the first cavity inside the motor housing can form a connected cavity structure. Simultaneously, since the three-phase terminal block and the terminal block body are integrally formed, there are no installation gaps between them. Air convection will not occur between the cavity inside the motor body and the controller box connected to the first connecting section of the three-phase terminal block. Hot air inside the motor body will not be transmitted to the controller box via the terminal block. The internal cavity of the motor body is isolated from the external environment, and condensation will not occur in the cavity where the terminals and the second connecting section are located. Insulation failures are less likely to occur at the terminal positions, thus improving the operational reliability of the motor in this application. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0026] Figure 1 This is a top view of the motor terminal block disclosed in the embodiments of this application when it is installed on the motor housing;

[0027] Figure 2 This is a bottom view of the motor terminal block disclosed in this application when it is installed on the motor housing (with part of the motor housing structure removed);

[0028] Figure 3 for Figure 2 AA section view in the middle;

[0029] Figure 4 for Figure 3 A magnified view of region M in the image;

[0030] Figure 5 This is a schematic diagram of the terminal block disclosed in this application after the top cover has been removed.

[0031] The above figures include the following reference numerals:

[0032] 10. Motor housing; 11. First connecting hole; 20. Terminal block; 21. Terminal block body; 211. Bottom shell; 2111. Opening; 212. Top cover; 2121. Clearance groove; 2101. Second cavity; 2102. Second connecting hole; 22. Three-phase terminal block; 221. First wiring segment; 222. Second wiring segment; 223. Injection molding segment; 23. Terminal block; 231. Horizontal segment; 232. Wiring end; 2321. Wiring hole; 30. Locking assembly; 31. Locking screw; 32. Locking nut. Detailed Implementation

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0036] See Figures 1 to 5 As shown, according to an embodiment of this application, a motor is provided. The motor includes a motor body ( Figure 1 The diagram only shows part of the motor body's outer casing structure and the terminal block 20.

[0037] In this application, the motor body includes a motor housing 10, which has a first cavity (not shown in the figure) and a first connecting hole 11. The first cavity is used to install the motor's wiring harness, stator and rotor structure. The first connecting hole 11 communicates with the first cavity to allow the wiring harness to pass through.

[0038] The terminal block 20 includes a terminal block body 21, a three-phase terminal block 22, and terminal blocks 23. The terminal block body 21 has a second cavity 2101 and a second connecting hole 2102, with the first connecting hole 11 communicating with the second cavity 2101. During actual installation, the terminal block body 21 is installed outside the motor housing 10, and the first connecting hole 11 is covered and sealed. After installation, the second connecting hole 2102 communicates with the first connecting hole 11. The three-phase terminal block 22 is integrally mounted on the terminal block body 21, and has a first wiring segment 221 located within the second cavity 2101 and a second wiring segment 222 located outside the second cavity 2101. The first wiring segment 221 is used for external structural electrical connection; the second wiring segment 222 is used for connection to the terminal blocks 23, and the terminal blocks 23 are used for wiring harness connection to the motor housing.

[0039] In this application, after the terminal block body 21 of the terminal block 20 is installed on the motor housing 10, the terminal block body 21 can cover and seal the first connection hole 11. At this time, the second connection hole 2102 provided on the terminal block body 21 communicates with the first connection hole 11. That is to say, through the function of the first connection hole 11 and the second connection hole 2102, the first cavity inside the motor housing 10 and the second cavity 2101 provided on the terminal block body 21 can be connected. The wires of the motor body can pass through the first connection hole 11 and the second connection hole 2102 and be connected to the second terminal segment 222 of the three-phase terminal block 22 through the terminal 23.

[0040] As can be seen, after the terminal block 20 is installed on the motor housing 10, the second cavity 2101 on the terminal block 20 and the first cavity inside the motor housing 10 can form a connected cavity structure. Meanwhile, since the three-phase terminal block 22 and the terminal block body 21 are integrally formed in this embodiment, there is no installation gap between the three-phase terminal block 22 and the terminal block body 21. There will be no air convection problem between the cavity inside the motor body and the controller box connected to the first connecting section 221 of the three-phase terminal block 22. Hot air inside the motor body will not be transmitted to the controller box through the terminal block 20. The internal cavity of the motor body is isolated from the external environment. Condensation will not occur in the cavity where the terminal 23 and the second connecting section 222 of the three-phase terminal block 22 are located. Insulation failure is less likely to occur at the terminal 23, thus improving the operational reliability of the motor in this embodiment.

[0041] See Figure 1 and Figure 2 As shown in this embodiment, Figure 1 and Figure 2The figure shows the end cover portion of the motor housing 10, which has the first connection hole 11 described above. A terminal block 20 is mounted on this end cover, and a first sealing layer (not shown) exists between the terminal block 20 and the end cover of the motor housing 10. This first sealing layer seals the gap between the terminal block body 21 of the terminal block 20 and the motor housing 10, preventing condensation caused by contact between hot air inside the motor body and cold air in the external environment. Optionally, the first sealing layer can be a sealant layer or a sealing ring, etc. This application preferably uses a sealant layer. In actual processing and assembly, sealant is first applied to the bottom of the terminal block body 21, and then the terminal block body 21 is adhered to the motor housing 10. Specifically, the terminal block body 21 is snapped over the first connection hole 11 of the motor housing 10, covering and sealing the first connection hole 11. To improve the installation stability of the terminal block body 21, locking screws or locking clips can also be used to fix the terminal block body 21 to the motor housing 10.

[0042] Combination Figures 2 to 4 As shown, the main body 21 of the terminal block in this embodiment includes a bottom shell 211 and a top cover 212. The bottom shell 211 is provided with the aforementioned second cavity 2101 and opening 2111. The second connecting hole 2102 is located at the bottom of the bottom shell 211, and the opening 2111 is located at the top of the bottom shell 211 and communicates with the second cavity 2101. In actual processing, the three-phase terminal block 22 is integrally formed with the bottom shell 211, and the top cover 212 is set on the bottom shell 211 and covers and seals the opening 2111.

[0043] In this embodiment, the main body 21 of the terminal block is divided into two parts: a bottom shell 211 and a top cover 212, which facilitates disassembly and assembly for the installation of structures such as the terminal block 23. During actual installation, the top cover 212 is opened, and wiring tools can be inserted into the second cavity 2101 through the opening 2111 for operation.

[0044] Furthermore, by integrally molding the three-phase terminal block 22 with the bottom shell 211, this embodiment facilitates the installation of the wiring terminals 23 compared to integrally molding the three-phase terminal block 22 with the top cover 212. Specifically, during wiring, the top cover 212 is opened, allowing the wiring harness inside the motor body to pass sequentially through the first connecting hole 11 and the second connecting hole 2102, and then into the second cavity 2101. Subsequently, through the locking structure and the wiring terminals 23, the wiring harness of the motor body can be fixedly connected to the three-phase terminal block 22. Afterward, the top cover 212 is closed. The operation is simple and the installation is convenient.

[0045] Optionally, a second sealing layer (not shown in the figure) is provided between the upper cover 212 and the bottom shell 211 in this embodiment. This second sealing layer facilitates sealing of the gap between the upper cover 212 and the bottom shell 211. Optionally, the second sealing layer in this embodiment can be a sealant layer or a sealing ring, etc. In this application, sealant is preferred for better sealing performance.

[0046] When actually assembling the main body 21 of the terminal block, the upper cover 212 and the bottom shell 211 can be connected by a structure such as screws, bolts, pins, rivets or clips. Any other variation of the concept under this application is within the protection scope of this application.

[0047] Recombined Figures 1 to 4 As shown, the three-phase terminal block 22 in this embodiment includes a UVW three-phase terminal block. The three-phase terminal block 22 includes conductive sheet structures such as copper busbars and aluminum busbars. In actual processing, the three-phase terminal block 22 and the terminal block body 21 are connected as one piece by a rubber injection molding method. The structure has high strength and good stability. At the position where the three-phase terminal block 22 passes through the second cavity 2101, there will be no gap between the three-phase terminal block 22 and the terminal block body 21. It can effectively isolate the external environment from the internal cavity of the terminal block 20, and prevent the hot air inside the motor body from contacting the cold air outside and causing condensation.

[0048] Furthermore, the three-phase terminal block 22 also includes an injection-molded section 223. It can be understood that the injection-molded section 223 refers to the portion of the three-phase terminal block 22 embedded inside the terminal block body 21, such as... Figure 4 As shown, the injection-molded section 223 consists of two segments, which are located at both ends of the second wiring segment 222, allowing the second wiring segment 222 to be suspended within the second cavity 2101. That is, in this embodiment, the two ends of the second wiring segment 222 of the three-phase terminal block 22 are integrally injection-molded and fixed to the terminal block body 21, while the second wiring segment 222 is suspended within the second cavity 2101. This enhances the installation stability and structural strength of the second wiring segment 222 within the second cavity 2101, and facilitates the connection of the terminal 23 to the second wiring segment 222.

[0049] Furthermore, in this embodiment, the terminal 23 is connected to the second terminal segment 222 via a locking assembly 30. Specifically, the locking assembly 30 includes a locking screw 31 and a locking nut 32. The locking screw 31 passes through the second terminal segment 222; the locking nut 32 is embedded in the terminal 23, and the locking nut 32 has a threaded hole adapted to the locking screw 31. The terminal 23 is stably fixed to the second terminal segment 222 by the cooperation of the locking screw 31 and the locking nut 32. At the same time, by embedding the locking nut 32 inside the terminal 23, this embodiment can save the space occupied by the locking nut 32 in the second cavity 2101, which facilitates the miniaturization design of the terminal block 20.

[0050] Furthermore, in this embodiment, the terminal block 23 includes a horizontal segment 231 and a terminal head 232. The horizontal segment 231 is fitted with the aforementioned locking nut 32, and the terminal head 232 is provided with a wiring hole 2321. The terminal head 232 is connected to one end of the horizontal segment 231 and forms an angle A with the horizontal segment 231, where 0° < A < 180°, for example, 30°, 60°, 90°, 150°, etc. That is to say, in this embodiment, the terminal head 232 of the terminal block 23 is inclined to the horizontal segment 231. Compared with the method where both are on the same horizontal plane, the arrangement of the terminal block 23 in this embodiment can save space in the width direction of the second cavity 2101, which is more suitable for the compact arrangement of the terminal block 20. In actual installation, the terminal 232 extends at least partially into the first connection hole 11. That is to say, in this embodiment, the terminal 232 can extend along the second connection hole 2102 into the first connection hole 11. In this way, the space occupied by the terminal 232 in the height direction of the second cavity 2101 can be saved, and the terminal block 20 can be made smaller.

[0051] To further achieve a miniaturized design of the terminal block 20, in this embodiment, the upper cover 212 is positioned against the second terminal segment 222, and the upper cover 212 is provided with a relief groove 2121 to avoid the locking screw 31. In this way, the structure of the entire terminal block 20 can be more compact.

[0052] As described above, this application completely isolates the three-phase leads of the motor windings from the controller housing (the controller's wiring harness is connected to the first terminal segment 221 of the three-phase terminal block 22) using a compact terminal block 20. This is equivalent to completely isolating the first cavity of the motor body from the cavity of the controller housing, preventing hot air inside the motor body from contacting cold air at the location of the external controller housing, thus completely eliminating the impact of condensation on poor insulation of the terminal blocks 23. Furthermore, the terminal block 20 of this application features a compact internal structure, significantly saving axial space in the motor. The parts of the motor in this application are mechanically assembled, facilitating later disassembly, recycling, or maintenance.

[0053] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0054] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0055] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electric motor, characterized in that, include: The motor body includes a motor housing (10), on which a first cavity and a first connecting hole (11) are provided, and the first connecting hole (11) communicates with the first cavity; Terminal block (20), the terminal block (20) includes a terminal block body (21), a three-phase terminal block (22) and terminal blocks (23); The terminal block body (21) is provided with a second cavity (2101) and a second connecting hole (2102). The first connecting hole (11) communicates with the second cavity (2101). The terminal block body (21) is installed on the outside of the motor housing (10) and covers and seals the first connecting hole (11). The second connecting hole (2102) communicates with the first connecting hole (11). The three-phase terminal block (22) is integrally disposed on the terminal block body (21), and the three-phase terminal block (22) has a first terminal section (221) located inside the second cavity (2101) and a second terminal section (222) located outside the second cavity (2101). The terminal block (23) is connected to the second terminal block (222); The terminal block (23) is detachably connected to the second terminal block (222) via a locking assembly (30); The locking assembly (30) includes: A locking screw (31) passes through the second terminal section (222); A locking nut (32) is embedded in the terminal block (23), and the locking nut (32) is provided with a threaded hole that is compatible with the locking screw (31); The main body (21) of the terminal block includes: The bottom shell (211) is provided with a second cavity (2101) and an opening (2111), the second connecting hole (2102) is located at the bottom of the bottom shell (211), the opening (2111) communicates with the second cavity (2101), and the three-phase terminal block (22) is integrally formed with the bottom shell (211). A top cover (212) is disposed on the bottom shell (211) and seals the opening (2111); The upper cover (212) is disposed against the second wiring segment (222), and the upper cover (212) is provided with a relief groove (2121) to avoid the locking screw (31).

2. The motor according to claim 1, characterized in that, The three-phase terminal block (22) and the terminal block body (21) are connected as one unit by a rubber injection molding method.

3. The motor according to claim 1, characterized in that, The three-phase terminal block (22) also includes an injection molding section (223) embedded in the terminal block body (21). The injection molding section (223) consists of two sections, which are located at the two ends of the second terminal block (222) so that the second terminal block (222) is suspended in the second cavity (2101).

4. The motor according to claim 1, characterized in that, The terminal block (23) includes a horizontal section (231) and a terminal head (232). The locking nut (32) is embedded on the horizontal section (231). The terminal head (232) is connected to one end of the horizontal section (231) and forms an angle A with the horizontal section (231), wherein 0° < A < 180°.

5. The motor according to claim 4, characterized in that, The terminal (232) extends at least partially into the first connection hole (11).

6. The motor according to claim 1, characterized in that, A first sealing layer is provided between the terminal block body (21) and the motor housing (10); and / or, A second sealing layer is provided between the bottom shell (211) and the top cover (212).

Images