Motor assembly and motor

Abstract

The motor assembly comprises a shell, a stator assembly and a connecting plate, the shell is provided with an accommodating cavity, the stator assembly is arranged in the accommodating cavity, the stator assembly comprises a plurality of stator windings, and the plurality of stator windings form a power input end; at least one end of the stator assembly is provided with the connecting plate, one surface, far away from the stator assembly, of the connecting plate is provided with a connecting terminal, and the connecting terminal is electrically connected with the power input end; the shell is provided with a connecting part which is used for axially splicing the shell of another motor assembly, and the connecting terminal is also used for being butted with a corresponding connecting terminal of another motor assembly. Therefore, the two motor assemblies can be spliced, motors of different models can be formed by the motor assemblies of different numbers, different shells and stator assemblies do not need to be additionally manufactured, the manufacturing cost and manufacturing difficulty of the motor are reduced, and the production efficiency of the motor can be greatly improved.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a motor assembly and a motor. Background Art

[0002] A motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. This includes single-phase and three-phase motors. A motor includes a stator with a power input terminal. For example, a three-phase motor includes U-phase, V-phase, and W-phase input terminals. These power input terminals are electrically connected to corresponding interfaces on a motor control device (e.g., a driver) to operate in response to control commands from the motor control device.

[0003] Different application scenarios often require different types of motors. In existing motor solutions, different types of motors require corresponding housings, insulation frames, stator cores and other components of different sizes. Therefore, multiple sets of molds need to be produced in the production process, which greatly increases costs and reduces production efficiency. Utility Model Content

[0004] The present application provides a motor assembly and a motor, which can solve the problems of high motor manufacturing cost and low production efficiency.

[0005] According to one aspect of the present application, an embodiment provides a motor assembly, comprising: a shell, a stator assembly, and a connecting plate, wherein the shell is provided with an accommodating cavity, the stator assembly is arranged in the accommodating cavity, the stator assembly includes a plurality of stator windings, and the plurality of stator windings form a power input end; at least one end of the stator assembly is provided with the connecting plate, and a side of the connecting plate away from the stator assembly is provided with a connecting terminal, and the connecting terminal is electrically connected to the power input end; the shell is provided with a connecting portion for axially splicing the shell of another motor assembly, and the connecting terminal is also used to dock with the corresponding connecting terminal of another motor assembly.

[0006] In one embodiment, a connecting plate is provided at each end of the stator assembly, a first connecting plate at one end is provided with a first connecting terminal on a side away from the stator assembly, and a second connecting plate at the other end is provided with a second connecting terminal corresponding to the first connecting terminal on a side away from the stator assembly. The first connecting terminal and the second connecting terminal are electrically connected to the corresponding power input end, respectively, and the first connecting terminal is also used to connect with the corresponding second connecting terminal of the other motor assembly.

[0007] In one embodiment, the first connecting terminal is provided with a plug-in slot, and the second connecting terminal is provided with a plug-in protrusion, and the plug-in slot is used for inserting the plug-in protrusion to form a docking connection between the first connecting terminal and the second connecting terminal of another motor component.

[0008] In one embodiment, a first electrical connection point fixedly connected to the power input end is provided on a surface of the first connecting plate close to the stator assembly, and the first electrical connection point is electrically connected to the first connecting terminal; or a first through hole is provided on the first connecting plate, and the power input end is electrically connected to the first connecting terminal through the first through hole;

[0009] A second electrical connection welding point is provided on a side of the second connecting plate close to the stator assembly, and the second electrical connection welding point is electrically connected to the power input end through a wire, and the second electrical connection welding point is electrically connected to the second connection terminal; or, a second through hole is provided on the second connecting plate, and the wire connected to the power input end passes through the second through hole and is electrically connected to the second connection terminal.

[0010] In one embodiment, the first connecting terminal and the second connecting terminal are circumferentially staggered on a plane where the axial direction of the stator assembly is located.

[0011] In one embodiment, each of the windings has an output terminal; the connecting board is a PCB board, and the PCB board includes a plurality of welding points, and the welding points are arranged on a side of the PCB board close to the stator assembly, and the plurality of welding points are electrically connected to the output terminals of the plurality of windings in a one-to-one correspondence.

[0012] In one embodiment, the connecting portion is a connecting hole, which axially penetrates the housing and is used for a bolt to pass through so as to axially connect to another motor assembly.

[0013] Alternatively, the connecting portion is a plane at the end of the housing, which is used to be bonded to a plane at the end of the housing of another motor assembly.

[0014] According to another aspect of the present application, an embodiment provides a motor, comprising a rotor, two end covers, and the motor assembly as described above, wherein the motor assembly is located between the two end covers, the two end covers are respectively connected and fixed to the housing of the motor assembly at corresponding ends, and the rotor axially passes through the motor assembly and is rotatably assembled on the two end covers.

[0015] In one embodiment, the motor includes at least three motor assemblies, and the shells of each motor assembly are axially spliced ​​in sequence through the connecting portion; wherein, the motor assemblies at the two ends are end motor assemblies, and the connecting plate is provided at one end of the end motor assembly, and the intermediate motor assembly is located between the two end motor assemblies, and the connecting plates are respectively provided at both ends of the intermediate motor assembly; the corresponding connecting terminals on the connecting plates of any two adjacent motor assemblies are connected to each other; the two end covers are respectively connected and fixed to the corresponding end motor assemblies; the shell of each motor assembly is provided with a mounting portion for fixing a socket, and the motor also includes a socket, and the socket is installed on the mounting portion of one of the motor assemblies.

[0016] In one embodiment, the connecting portion is a connecting hole, which axially passes through the shell, and mounting holes corresponding to the connecting holes are respectively provided on the two end covers. Bolts pass through the mounting hole on one end cover, the connecting hole of the shell, and the mounting hole on the other end cover in sequence to connect and fix the two end covers and the shell.

[0017] According to the motor assembly and motor of the above embodiment, the stator assemblies of two motor assemblies can be spliced ​​together using the connection terminals provided on the motor assembly connecting plate, and the housings of two motor assemblies can be spliced ​​together using the connection portion provided on the motor assembly housing. This allows the splicing of two motor assemblies. Different numbers of motor assemblies can form different motor models, eliminating the need to manufacture separate housings and stator assemblies. This reduces the cost and difficulty of motor production and significantly improves motor production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a structural schematic diagram of a motor assembly according to an embodiment;

[0019] Figure 2 is a schematic structural diagram of a second connecting terminal according to an embodiment;

[0020] Figure 3 This is a schematic structural diagram of the splicing of motor components according to an embodiment;

[0021] Figure 4 For an embodiment Figure 3 Schematic diagram of the cross section along the middle BB direction;

[0022] Figure 5 A circuit diagram of two motor assemblies connected in one embodiment;

[0023] Figure 6 A structural schematic diagram of a motor according to another embodiment;

[0024] Figure 7 is another structural schematic diagram of a motor according to another embodiment;

[0025] Description of reference numerals:

[0026] 1-housing, 101-connecting part; 2-stator assembly; 3-connecting plate, 301-first connecting terminal, 302-second connecting terminal; 4-socket; 5-shielding cover; 6-end cover. DETAILED DESCRIPTION

[0027] The present application is further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail. They can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0028] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various embodiments. Furthermore, the steps or actions in the method description may be reordered or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various sequences in the specification and drawings are provided solely for the purpose of clearly describing a particular embodiment and are not intended to be mandatory, unless otherwise specified.

[0029] Component numbers used herein, such as "first" and "second," are used solely to distinguish the components being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0030] See also Figures 1 to 5 An embodiment of the present application provides a motor assembly, including a housing 1, a stator assembly 2, a connecting plate 3, and other functional components that may exist as needed, which are described in detail below.

[0031] The motor assembly housing 1 in this embodiment has a housing cavity, within which the stator assembly 2 is located. The stator assembly 2 includes multiple stator windings, which form a power input terminal. A connecting plate 3 is provided at at least one end of the stator assembly 2. A connecting terminal is provided on the side of the connecting plate 3 facing away from the stator assembly 2, which is electrically connected to the power input terminal. The housing 1 is provided with a connecting portion 101 for axially attaching the housing 1 of another motor assembly. The connecting terminal is also used to mate with a corresponding connecting terminal on the other motor assembly.

[0032] It is understandable that the stator assembly 2 in this embodiment can be fixed in the accommodating cavity of the shell 1. This embodiment does not limit the specific fixing method of the stator assembly 2. For example, the shell 1 can be heated first during assembly according to the principle of thermal expansion and contraction, and then the stator assembly 2 is placed in the accommodating cavity. After cooling, the shell 1 shrinks to fix the stator assembly 2 in the accommodating cavity; or other methods can be used, such as snap-on. In order to facilitate the assembly of the stator assembly 2, one or both ends of the accommodating cavity are provided as an opening structure for the stator assembly 2 to be inserted and assembled. This embodiment does not limit the material of the shell 1 either, and it can realize both connection and protection functions, for example, it can be made of metal or plastic. In this embodiment, the stator assembly 2 includes a plurality of stator windings and an insulating stator frame, and the stator windings are arranged on the stator frame. In order to facilitate the arrangement of the stator windings, the stator frame can be formed by a plurality of spliced ​​bodies being circularly spliced ​​together. In some application scenarios, the stator frame can also be an integrated structure. In this embodiment, the power input end formed by multiple stator windings includes U phase, V phase, and W phase. This embodiment does not specifically limit the electrical connection method between the stator windings. A rotating magnetic field can be generated after three-phase alternating current is passed through.

[0033] In this embodiment, the connection terminals provided on the connection plate 3 include U-phase, V-phase, and W-phase connection terminals. When the connection terminals are electrically connected to the power input terminal, the U-phase, V-phase, and W-phase of the connection terminals correspond one-to-one to the U-phase, V-phase, and W-phase of the power input terminal, respectively. In this embodiment, the connection plate 3 can be fixed to the end of the stator assembly 2 by, but not limited to, bonding. In some application scenarios, the connection plate 3 can also be fixed to the end of the housing 1. In order to facilitate the splicing between adjacent motor assemblies, the connection plate 3 may not protrude from the surface of the end of the housing 1. The connection plate 3 in this embodiment has a clearance hole, which corresponds to the inner hole of the stator assembly 2 to allow the rotor of the motor to be inserted. As Figure 3 、 Figure 4The motor assembly in this embodiment can be axially spliced ​​with another motor assembly. During splicing, the motor assembly housings 1 and 1 are spliced ​​together via the connection portion 101, and the stator assembly 2 and 2 are spliced ​​together via the connection terminals on the connection plate 3. When the stator assembly 2 and 2 are spliced ​​together, the U phase, V phase, and W phase of the two connecting terminals are connected in a one-to-one correspondence. Axial splicing in this embodiment refers to the sequential splicing of the motor assemblies along the axis of the motor assembly or stator assembly 2.

[0034] The motor assembly in this embodiment realizes the splicing of the stator assembly between the two motor assemblies through the connection terminals provided on the connecting plate 3, and realizes the splicing of the shell 1 between the two motor assemblies through the connection portion 101 provided on the shell 1, thereby realizing the splicing between the two motor assemblies. Different numbers of motor assemblies can form motors of different models, and there is no need to make different shells 1 and stator assemblies 2 separately. For example, when setting up one motor assembly, the power of the motor is W. When two motor assemblies are spliced ​​together, the power of the motor is 2W. Therefore, a 2W power motor does not require additional production of the shell 1 and stator assembly 2. This reduces the production cost and difficulty of the motor.

[0035] In one embodiment, the motor assembly may be provided with only one connecting plate 3 at one end of the stator assembly 2, thereby enabling the splicing of two motor assemblies. During splicing, the housings 1 of the two motor assemblies are joined together via the connecting portion 101, and the connecting terminals of the connecting plate 3 on the preceding motor assembly are docked with the connecting terminals of the connecting plate 3 on the succeeding motor assembly. In this case, both motors with one motor assembly and motors with two motor assemblies can be assembled using the same housing 1 and stator assembly 2, reducing the manufacturing cost and production efficiency of the motors.

[0036] One embodiment, such as Figure 1 、 Figure 2 、 Figure 5 As shown, connecting plates 3 are respectively provided at both ends of the stator assembly 2. The first connecting plate 3 at one end is provided with a first connecting terminal 301 on a side away from the stator assembly 2, and the second connecting plate 3 at the other end is provided with a second connecting terminal 302 corresponding to the first connecting terminal 301 on a side away from the stator assembly 2. The first connecting terminal 301 and the second connecting terminal 302 are respectively electrically connected to the corresponding power input ends, and the first connecting terminal 301 is also used to connect with the corresponding second connecting terminal 302 of another motor assembly.

[0037] Specifically, such as Figure 5As shown, the first connecting terminal 301 has U-phase, V-phase, and W-phase connecting terminals, and the second connecting terminal 302 has corresponding U-phase, V-phase, and W-phase connecting terminals, and the U-phase, V-phase, and W-phase connecting terminals of the first connecting terminal 301 and the second connecting terminal 302 are respectively connected to the U-phase, V-phase, and W-phase power input terminals of the corresponding stator winding. By providing a connecting plate 3 at each end, the splicing of the motor assembly can be achieved by connecting the first connecting terminal 301 at the tail of the previous motor assembly A to the second connecting terminal 302 at the head of the next motor assembly A1, and the first connecting terminal 301 at the tail of the next motor assembly A1 can be connected to the second connecting terminal 302 at the head of the next motor assembly, and so on. In this way, not only can the splicing of two motor assemblies be achieved, but also the axial splicing of three or even more motor assemblies can be achieved, further reducing the production cost of different motor models and improving production efficiency. For example, to produce a 200W motor, a 400W motor, a 600W motor, and an 800W motor, use one 200W motor assembly, splice two 200W motor assemblies, splice three 200W motor assemblies, and finally splice four 200W motor assemblies.

[0038] In this embodiment, the mechanical structures of the first and second connecting terminals 301, 302 can be identical or different, enabling docking of the first and second connecting terminals 301, 302. In one embodiment, if the mechanical structures of the first and second connecting terminals 301, 302 are identical, both can serve as electrical contacts, enabling electrical contact between the first and second connecting terminals 301, 302 while being secured to the motor assembly housing 1. In another embodiment, if the mechanical structures of the first and second connecting terminals 301, 302 are different, the first connecting terminal 301 can be provided with a mating slot, while the second connecting terminal 302 can be provided with a mating protrusion. The mating slot is designed to receive the mating protrusion, thereby mating the first connecting terminal 301 with the second connecting terminal 302 of another motor assembly. Once mated, electrical connection is established, and the mating created by the mating protrusion inserted into the mating slot is more stable and reliable. In some application scenarios, the first connecting terminal 301 can also be provided with a mating protrusion, while the second connecting terminal 302 can be provided with a mating slot. The specific choice can be made based on actual needs. In this embodiment, the mechanical structures of the first connection terminal 301 and the second connection terminal 302 are not limited to the above structures, and may also be any other structures that can achieve electrical connection.

[0039] In one embodiment, a first electrical connection weld point connected and fixed to the power input end is provided on one side of the first connecting plate 3 close to the stator assembly 2, and the first electrical connection weld point is electrically connected to the first connecting terminal 301. When connected through the electrical connection weld point, assembly is simpler and faster, and it only needs to be fixed by welding. The electrical connection between the first electrical connection weld point and the first connecting terminal 301 can be achieved through an electrical connection column provided on the connecting plate 3. The electrical connection column is provided in a hole on the connecting plate 3, and one end of the electrical connection column fixes the first connecting terminal 301 and the other end fixes the first electrical connection weld point. The first electrical connection weld point in this embodiment also includes three weld points corresponding to the U phase, V phase, and W phase. In one embodiment, a first through hole can be provided on the first connecting plate 3, and the power input end is electrically connected to the first connecting terminal 301 through the first through hole. When the through hole is provided, the production of the first connecting plate 3 is simpler, and it only needs to process the hole thereon.

[0040] Similarly, in one embodiment, a second electrical connection point can be provided on a side of the second connecting plate 3 proximal to the stator assembly 2. This second electrical connection point is electrically connected to the power input terminal via a wire, and this second electrical connection point is electrically connected to the second connection terminal 302. Connection via this electrical connection point allows for simpler and faster assembly, requiring only welding and securing. In one embodiment, a second through-hole can be provided on the second connecting plate 3, through which the wire connecting the power input terminal passes to electrically connect to the second connection terminal 302. Providing this through-hole simplifies the manufacture of the second connecting plate 3, requiring only a hole to be machined.

[0041] In one embodiment, the first connection terminal 301 and the second connection terminal 302 are circumferentially staggered on the plane where the axial direction of the stator assembly 2 is located. The circumferential staggering of the first connection terminal 301 and the second connection terminal 302 can form the effect of a stator skew slot. Because the second connection terminal 302 is circumferentially staggered with the first connection terminal 301, when splicing, the latter motor assembly needs to be rotated circumferentially around its axis by a certain angle before the second connection terminal 302 on the latter motor assembly can correspond to the first connection terminal 301 on the previous motor assembly. After rotation, the effect of a stator skew slot can be formed. In this embodiment, the axial plane is a plane perpendicular to the axis of the stator assembly 2. The circumferential staggering means that when the plane where the first connection terminal 301 is located is axially projected onto the plane where the second connection terminal 302 is located, the first connection terminal 301 and the second connection terminal 302 do not overlap, where the axial direction is the axial direction. At this time, in order to facilitate the splicing of the latter motor assembly with the previous motor assembly after rotation, the housing 1 of the motor assembly can be set to a cylindrical shape.

[0042] In one embodiment, the first connection terminal 301 and the second connection terminal 302 may not be circumferentially offset on the axial plane of the stator assembly 2, that is, the first connection terminal 301 and the second connection terminal 302 may be arranged in axially overlapping positions, that is, the first connection terminal 301 and the second connection terminal 302 overlap in axial projection. In this case, the housing 1 of the motor assembly can be configured as any shape and can be spliced ​​together via the connection portion 101.

[0043] In one embodiment, each winding has an outlet terminal; the connecting plate 3 is a PCB board, which includes a plurality of welding points. The welding points are located on a side of the PCB board near the stator assembly 2, and the multiple welding points are electrically connected to the outlet terminals of the multiple windings in a one-to-one correspondence. The electrical connection between the windings can be achieved through the PCB board, which is simple, quick, and error-prone. Specifically, the PCB board in this embodiment is provided with a circuit, and the electrical connection between the windings can be achieved through the circuit on the PCB board. During production, after the welding points are electrically connected to the outlet terminals in a one-to-one correspondence, the connecting plate 3 can be further fixed to the end of the stator assembly 2.

[0044] In one embodiment, the connecting portion 101 is a connecting hole that axially passes through the housing 1 for passing bolts to axially splice another motor assembly. During splicing, the bolts are sequentially passed through the connecting holes on each housing 1 and then fixed with nuts, thereby forming a splice between the housings 1 and 1. At least two or even more connecting holes can be provided on the housing 1 to increase the stability of the splicing. Alternatively, in some embodiments, the connecting portion 101 can also be a flat surface at the end of the housing 1, which is used to bond with the flat surface at the end of the housing 1 of another motor assembly. During splicing, glue is first applied to the flat surface at the end of the housing 1, and then the housing 1 of the other motor assembly is closed. After the glue cures, the splice between the housings 1 and 1 is formed. The above is only an example. The connecting portion 101 can also be other structures that can achieve splicing between housings 1 and 1, for example, by snap-fitting, that is, a slot is provided at the front end of the housing 1, and a protrusion is provided at the rear end of the housing 1. During splicing, the protrusion at the rear end of the housing 1 snaps into the slot on the housing 1 of the subsequent motor assembly to form a connection.

[0045] In one embodiment, the housing 1 is provided with a mounting portion for fixing the socket 4, the socket 4 is electrically connected to the power input terminal, the mounting portion is provided with a through hole for the wire connected to the socket 4 to pass through, and the motor assembly also includes a shielding cover 5, the shielding cover 5 is used to be detachably connected to the outside of the housing 1 to cover the through hole. The socket 4 is an external electrical connection component, which is used for electrical connection when the motor is in use. The socket 4 includes three electrical connection points corresponding to the U phase, V phase, and W phase of the power input terminal. After splicing, the shielding cover 5 on any motor assembly can be removed to expose a through hole, and the socket 4 can be installed on the exposed through hole. The shielding cover 5 realizes the selective installation of the socket 4, and there is no need to set the socket 4 on each spliced ​​motor assembly, thereby avoiding waste of resources. The other through holes without the socket 4 are covered by the shielding cover 5, which ensures the sealing of the motor.

[0046] In the motor assembly of the above embodiment, the stators of the motor assemblies are connected together via the connection terminals provided on the connecting plate 3. The housings 1 of the motor assemblies are connected together via the connection portion 101 provided on the motor assembly housing 1. This allows for the connection of the motor assemblies. Different numbers of motor assemblies can form different models of motors, eliminating the need to manufacture separate housings 1 and stator assemblies 2. This reduces the cost and difficulty of motor production and significantly improves motor production efficiency.

[0047] See also Figures 1 to 7 The embodiment of the present application also provides a motor, including a rotor (not shown in the figure), two end covers 6 and the motor assembly as described above, the motor assembly is located between the two end covers 6, the two end covers 6 are respectively connected and fixed to the housing 1 of the motor assembly at the corresponding ends, and the rotor axially passes through the motor assembly and is rotatably assembled on the two end covers 6.

[0048] It can be understood that the motor assembly in this embodiment is the same as that in the above embodiment, and will not be described in detail here. The end cover 6 in this embodiment can seal the shaft hole of the motor assembly to ensure the sealing of the motor. This embodiment does not limit the material of the end cover 6, and it can also be metal or plastic. Specifically, the material of the end cover 6 can be the same as the material of the housing 1. The rotor in this embodiment can rotate in the rotating magnetic field generated after the stator assembly 2 is energized. The rotor in this embodiment is located in the shaft hole of the motor assembly, and both ends extend from the motor assembly and are rotatably assembled on the two end covers 6 through bearings. In order to achieve splicing, the rotor in this embodiment can be set to multiple models. For example, when there is only one motor assembly, a corresponding rotor model is set, and when there are two motor assemblies, another rotor model is set, and more rotor models are set in turn. When splicing, just select the corresponding rotor model for installation.

[0049] In one embodiment, the motor may be provided with only one motor assembly. In this case, the motor assembly at the corresponding ends connected to the end caps 6 is identical. The motor in one motor assembly corresponds to a single motor model. During assembly, the end caps 6 are simply secured to both ends of the motor assembly. In this case, the motor assembly is provided with a socket 4. The motor assembly may be provided with only one connecting plate 3 at one end of the stator assembly 2, or with a first connecting plate 3 and a second connecting plate 3 at each end of the stator assembly 2.

[0050] In one embodiment, the motor can be provided with two motor assemblies, and the motors of the two motor assemblies correspond to a motor model. In this case, the two motor assemblies can be spliced ​​together, and then the two end caps 6 can be connected to the two spliced ​​motor assemblies. The two motor assemblies can be provided with only one connecting plate 3 at one end of the stator assembly 2, and the connecting terminals on the connecting plate 3 of one motor assembly can be docked with the connecting terminals on the connecting plate 3 of the other motor assembly; or, the two motor assemblies can also be provided with a first connecting plate 3 and a second connecting plate 3 at both ends of the stator assembly 2, respectively, and the first connecting terminal 301 on the connecting plate 3 of one motor assembly can be docked with the second connecting terminal 302 on the connecting plate 3 of the other motor assembly.

[0051] In one embodiment, Figure 6 、 Figure 7 The motor comprises at least three motor assemblies, the housings 1 of which are axially connected in sequence via a connecting portion 101. The motor assemblies at the two ends are end motor assemblies, each with a connecting plate 3 at one end. The middle motor assembly is located between the two end motor assemblies, each with a connecting plate 3 at each end. The corresponding connecting terminals on the connecting plates 3 of any two adjacent motor assemblies are connected to each other, and the two end caps 6 are respectively connected and fixed to the corresponding end motor assemblies. This allows the formation of a third or even more motor models.

[0052] In this embodiment, when the motor includes at least three motor assemblies, the housing 1 of each motor assembly is provided with a mounting portion for securing a socket 4. The motor also includes a socket 4, which is mounted on the mounting portion of one of the motor assemblies. The mounting portion in this embodiment is the same as in the previous embodiment and will not be described in detail here. During installation, first remove the shielding cover 5 from any motor assembly, then install the socket 4 so that it is electrically connected to the power input terminal.

[0053] In one embodiment, the end caps 6 can be fixed to the motor assembly at the corresponding end by screws. Furthermore, when the connecting portion 101 is a connecting hole axially extending through the housing 1, mounting holes corresponding to the connecting holes are respectively provided on the two end caps 6. During installation, the bolts are sequentially passed through the mounting hole on one end cap 6, the connecting hole on the housing 1, and the mounting hole on the other end cap 6, and then tightened with nuts to connect and fix the two end caps 6 and the housing 1 at one time. That is, the same bolt is used to achieve the splicing of the motor assembly while also achieving the installation of the front and rear end caps 6 of the motor, making installation simple and quick.

[0054] In the motor of the above embodiment, the stators of the motor assemblies are spliced ​​together by the connection terminals provided on the motor assembly connecting plate 3, and the housings 1 of the motor assemblies are spliced ​​together by the connection portion 101 provided on the motor assembly housing 1, thereby achieving splicing between the motor assemblies. When assembling the motor, the corresponding number of motor assemblies can be selected for installation according to the model requirements. As a result, different models of motors do not need to be manufactured with different housings 1 and stator assemblies 2, which reduces the production cost and difficulty of the motor and greatly improves the efficiency of motor production.

[0055] The above specific examples are used to illustrate the present application, which is only used to help understand the present application and is not intended to limit the present application. For those skilled in the art of the present application, based on the concept of the present application, they can also make some simple deductions, modifications or substitutions.

Claims

1. A motor assembly, characterized in that: include: A shell, a stator assembly, and a connecting plate. The shell is provided with a accommodating cavity, the stator assembly is arranged in the accommodating cavity, the stator assembly includes multiple stator windings, and the multiple stator windings form a power input end; at least one end of the stator assembly is provided with the connecting plate, and the side of the connecting plate away from the stator assembly is provided with a connecting terminal, and the connecting terminal is electrically connected to the power input end; the shell is provided with a connecting part for axially splicing the shell of another motor assembly, and the connecting terminal is also used to dock with the corresponding connecting terminal of another motor assembly.

2. The motor assembly according to claim 1, characterized in that The connecting plates are respectively provided at both ends of the stator assembly. The first connecting plate at one end is provided with a first connecting terminal on a side away from the stator assembly, and the second connecting plate at the other end is provided with a second connecting terminal corresponding to the first connecting terminal on a side away from the stator assembly. The first connecting terminal and the second connecting terminal are respectively electrically connected to the corresponding power input end, and the first connecting terminal is also used to connect with the corresponding second connecting terminal of the other motor assembly.

3. The motor assembly according to claim 2, characterized in that The first connecting terminal is provided with a plug-in slot, and the second connecting terminal is provided with a plug-in protrusion. The plug-in slot is used for inserting the plug-in protrusion to form a docking connection between the first connecting terminal and the second connecting terminal of another motor component.

4. The motor assembly according to claim 2, characterized in that A first electrical connection point fixedly connected to the power input end is provided on a surface of the first connecting plate close to the stator assembly, and the first electrical connection point is electrically connected to the first connecting terminal; or a first through hole is provided on the first connecting plate, and the power input end is electrically connected to the first connecting terminal through the first through hole; A second electrical connection welding point is provided on a side of the second connecting plate close to the stator assembly, and the second electrical connection welding point is electrically connected to the power input end through a wire, and the second electrical connection welding point is electrically connected to the second connection terminal; or, a second through hole is provided on the second connecting plate, and the wire connected to the power input end passes through the second through hole and is electrically connected to the second connection terminal.

5. The motor assembly according to claim 2, characterized in that The first connecting terminal and the second connecting terminal are circumferentially staggered on a plane where the axial direction of the stator assembly is located.

6. The motor assembly according to any one of claims 1 to 5, characterized in that: Each of the windings has an outlet terminal; the connecting board is a PCB board, and the PCB board includes a plurality of welding points, which are arranged on a side of the PCB board close to the stator assembly, and the plurality of welding points are electrically connected to the outlet terminals of the plurality of windings in a one-to-one correspondence.

7. The motor assembly according to any one of claims 1 to 5, characterized in that: The connecting portion is a connecting hole, which axially penetrates the housing and is used for a bolt to pass through so as to axially connect to another motor assembly; Alternatively, the connecting portion is a plane at the end of the housing, which is used to be bonded to a plane at the end of the housing of another motor assembly.

8. A motor, characterized in that: It comprises a rotor, two end covers, and a motor assembly as described in any one of claims 1 to 7, wherein the motor assembly is located between the two end covers, the two end covers are respectively connected and fixed to the housing of the motor assembly at corresponding ends, and the rotor axially passes through the motor assembly and is rotatably assembled on the two end covers.

9. The motor according to claim 8, characterized in that The motor includes at least three motor assemblies, and the shells of each motor assembly are axially spliced ​​in sequence through the connecting part; wherein, the motor assemblies at the two ends are end motor assemblies, and the connecting plate is provided at one end of the end motor assembly, and the intermediate motor assembly is located between the two end motor assemblies, and the connecting plates are respectively provided at both ends of the intermediate motor assembly; the corresponding connecting terminals on the connecting plates of any two adjacent motor assemblies are connected to each other; the two end covers are respectively connected and fixed to the shells of the corresponding end motor assemblies; the shell of each motor assembly is provided with a mounting portion for fixing a socket, and the motor also includes a socket, and the socket is installed on the mounting portion of one of the motor assemblies.

10. The motor according to claim 8, characterized in that The connecting portion is a connecting hole, which axially passes through the shell. Mounting holes corresponding to the connecting holes are respectively provided on the two end covers. Bolts pass through the mounting hole on one end cover, the connecting hole of the shell, and the mounting hole on the other end cover in sequence to connect and fix the two end covers and the shell.

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