Motor assembly and electrical equipment

Abstract

The utility model discloses a motor assembly and electrical equipment, and belongs to the technical field of driving devices. The disclosed electrical equipment comprises a motor assembly, the motor assembly comprises a motor, the motor comprises a shell and a transmission shaft, one end of the shell is provided with a mounting port, and part of the transmission shaft is located in an inner cavity of the shell; the encoder comprises a shell, a rotating disc and a detection element, the shell shields the mounting opening and is connected with the shell, the shell is rotationally connected with the transmission shaft, the rotating disc is connected with the transmission shaft and synchronously rotates with the transmission shaft, and the detection element is located in an inner cavity of the shell. The motor assembly disclosed by the utility model is relatively small in occupied space, so that the motor assembly is relatively wide in application range.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of driving devices, and particularly relates to a motor assembly and an electrical equipment. BACKGROUND

[0002] With the development of automation technology, the demand for accurate control of mechanical equipment is increasing. In modern industrial applications, the motor is a core component of electrical equipment, and its control accuracy is directly related to the operation reliability of the entire equipment. At present, in order to improve the control accuracy of the motor, an encoder is usually integrated on the motor.

[0003] However, in the traditional design, the volume of the motor assembly formed by the motor and the encoder as a whole is large, which leads to a large space occupied by the motor assembly, thereby causing a narrow application range of the motor assembly. CONTENT OF THE INVENTION

[0004] The purpose of the embodiments of the application is to provide a motor assembly and an electrical equipment, which can solve the problem of a large space occupied by the motor assembly in the related art.

[0005] In a first aspect, the embodiments of the application provide a motor assembly, which comprises:

[0006] a motor, the motor comprising a shell and a transmission shaft, one end of the shell being provided with a mounting port, and part of the transmission shaft being located in an inner cavity of the shell;

[0007] an encoder, the encoder comprising a shell, a rotating disc and a detection element, the shell shielding the mounting port and being connected with the shell, and the shell being rotationally connected with the transmission shaft, the rotating disc being connected with the transmission shaft and synchronously rotating with the transmission shaft, and the detection element being located in an inner cavity of the shell.

[0008] In a second aspect, the embodiments of the application further provide an electrical equipment comprising the motor assembly described above.

[0009] In the embodiments of the application, the shell of the encoder shields the mounting port of the shell, and the transmission shaft is rotationally connected with the shell. Compared with the scheme of shielding the mounting port of the shell and installing the transmission shaft by additionally using other components, the volume of the motor assembly provided in the embodiments of the application is smaller, so that the space occupied by the motor assembly provided in the embodiments of the application is smaller, and accordingly, the application range thereof is wider.

[0010] In addition, the shell is rotationally connected with the transmission shaft, the rotating disc is connected with the transmission shaft and rotates synchronously with the transmission shaft, and the detection element is located in the inner cavity of the shell. In this way, the detection element and the transmission shaft are both mounted on the shell, which is beneficial to improving the alignment accuracy between the detection element and the rotating disc, thereby improving the detection accuracy of the encoder. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 A structural schematic diagram of a motor assembly disclosed in an embodiment of the present application;

[0012] Figure 2 An explosion schematic diagram of the motor assembly disclosed in the embodiment of the present application;

[0013] Figure 3 An explosion schematic diagram of the motor assembly disclosed in the embodiment of the present application;

[0014] Figure 4 A partial structural schematic diagram of the motor assembly disclosed in the embodiment of the present application (omitting the second sub-shell);

[0015] Figure 5 A partial structural schematic diagram of the motor assembly disclosed in the embodiment of the present application (omitting the second sub-shell and the circuit board);

[0016] Figure 6 A structural schematic diagram of the first sub-shell of the motor assembly disclosed in the embodiment of the present application;

[0017] Figure 7 A structural schematic diagram of the second sub-shell of the motor assembly disclosed in the embodiment of the present application;

[0018] Figure 8 A structural schematic diagram of the connecting sleeve disclosed in the embodiment of the present application.

[0019] Explanation of reference signs:

[0020] 110 - shell, 111 - cylinder, 1111 - mounting port, 112 - transmission shaft;

[0021] 210 - shell, 211 - first sub-shell, 2111 - limiting portion, 2112 - groove, 2113 - first protruding portion, 2114 - second protruding portion, 2115 - through hole, 2115a - first hole segment, 2115b - second hole segment, 212 - second sub-shell, 220 - rotating disc;

[0022] 300 - circuit board;

[0023] 410 - first connecting piece, 420 - second connecting piece, 430 - third connecting piece;

[0024] 500 - electrical connection part;

[0025] 600 - connecting sleeve, 610 - first cylinder segment, 620 - second cylinder segment;

[0026] 700 - threading hole;

[0027] 800 - detection element;

[0028] 910 - positioning column, 920 - positioning groove. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0030] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually a category and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in a "or" relationship.

[0031] The motor assembly and electrical equipment provided by the embodiments of the present application will be described in detail below with reference to the drawings and specific embodiments and their application scenarios.

[0032] Please refer to Figures 1 to 8 As shown in the drawings, the embodiments of the present application provide a motor assembly, comprising: a motor and an encoder.

[0033] The motor comprises a housing 110 and a transmission shaft 120. One end of the housing 110 is provided with a mounting port 1111. Components in the inner cavity of the housing 110, such as a stator, can enter or exit the inner cavity of the housing 110 through the mounting port 1111. Part of the transmission shaft 120 is located in the inner cavity of the housing 110.

[0034] The encoder comprises a shell 210, a rotating disc 220, and a detection element 800. The shell 210 shields the mounting port 1111 and is connected to the housing 110. The shell 210 is rotationally connected to the transmission shaft 120. The rotating disc 220 is connected to the transmission shaft 120 and rotates synchronously with the transmission shaft 120. The detection element 800 is located in the inner cavity of the shell 210.

[0035] The rotating disc 220 is, for example, a magnetic disc, and the detection element 800 is, for example, a magnetic sensitive element, and the magnetic sensitive element is, for example, a Hall sensor, or the rotating disc 220 is also a grating disc, and the detection element 800 is, for example, a light sensitive element. In actual use, the rotating disc 220 cooperates with the detection element 800 to realize detection of the working parameter of the transmission shaft 120, and the working parameter of the transmission shaft 120 includes at least one of the rotating angle of the transmission shaft 120, the rotating direction of the transmission shaft 120, and the rotating speed of the transmission shaft 120.

[0036] In a conventional design, the motor includes, for example, a shell 110, a rear end cover, and a transmission shaft 120. One end of the shell 110 is provided with a mounting opening 1111 which is in communication with an inner cavity of the shell 110. The rear end cover is connected to the shell 110 and covers the mounting opening 1111. Part of the transmission shaft 120 is located in the inner cavity of the shell 110, and the transmission shaft 120 is rotationally connected to the rear end cover. The encoder includes, for example, a housing 210, a rotating disc 220, and a detection element 800. The rotating disc 220 is connected to the transmission shaft 120 and rotates synchronously with the transmission shaft 120. The housing 210 is located outside the rear end cover and is connected to the rear end cover. The detection element 800 is located in an inner cavity of the housing 210.

[0037] In the embodiment of the present application, the housing 210 of the encoder covers the mounting opening 1111 of the shell 110, and the transmission shaft 120 is rotationally connected to the housing 210. Compared with the scheme of covering the mounting opening 1111 of the shell 110 and mounting the transmission shaft 120 by additionally using other components such as the rear end cover of the motor, the motor assembly provided in the embodiment of the present application has a smaller volume, so that the motor assembly provided in the embodiment of the present application occupies a smaller space and has a wider range of application.

[0038] In addition, in the scheme of the embodiment of the present application, the housing 210 is rotationally connected to the transmission shaft 120, the rotating disc 220 is connected to the transmission shaft 120 and rotates synchronously with the transmission shaft 120, and the detection element 800 is located in the inner cavity of the housing 210. In this way, the detection element 800 and the transmission shaft 120 are both mounted on the housing 210, which is conducive to improving the alignment accuracy between the detection element 800 and the rotating disc 220, so that the detection accuracy of the encoder is higher. Specifically, in actual use, the detection element 800 and the rotating disc 220 are, for example, both circular structures, and the alignment accuracy between the detection element 800 and the rotating disc 220 is the highest when the center line of the detection element 800 coincides with the center line of the rotating disc 220.

[0039] In another embodiment, with reference to Figure 1 and Figure 4As shown, the motor assembly further comprises a circuit board 300, the circuit board 300 is located in the inner cavity of the shell 210, the detection element 800 is mounted on the circuit board 300 and electrically connected with the circuit board 300. After being arranged in this way, the detection element 800 and the circuit board 300 are integrated in the inner cavity of the shell 210, which is conducive to simplifying the connection between the detection element 800 and the circuit board 300 and making the motor assembly as a whole more compact, thereby reducing the volume of the motor assembly.

[0040] As a specific embodiment, the detection element 800 is directly welded on the circuit board 300, for example. In this way, the detection element 800 can be fixed on the circuit board 300, and at the same time, the electrical connection between the detection element 800 and the circuit board 300 can be realized.

[0041] In other alternative embodiments, the motor assembly can further comprise a protective shell connected with the outer shell 110 and the circuit board 300 located in the inner cavity of the protective shell, and the detection element 800 is electrically connected with the circuit board 300 through a wire. That is, the protective shell independent of the outer shell 110 and the shell 210 is additionally provided to accommodate the circuit board 300.

[0042] In further embodiments, referring to Figures 1 to 5 As shown, the shell 210 comprises a first sub-shell 211 and a second sub-shell 212, the first sub-shell 211 and the second sub-shell 212 are detachably connected and jointly enclose the inner cavity of the shell 210, the first sub-shell 211 shields the mounting port 1111 and is rotationally connected with the transmission shaft 120, and at least part of the edges of the circuit board 300 is clamped between the first sub-shell 211 and the second sub-shell 212.

[0043] In this embodiment, the first sub-shell 211 and the second sub-shell 212 are detachably connected, so that the second sub-shell 212 can be conveniently disassembled, and in the case of disassembling the second sub-shell 212, the components in the inner cavity of the shell 210, such as the circuit board 300, can be conveniently disassembled. In addition, in this embodiment, at least part of the edges of the circuit board 300 is clamped between the first sub-shell 211 and the second sub-shell 212, so that when the circuit board 300 is installed, the position of the circuit board 300 can be conveniently positioned by means of the first sub-shell 211 or the second sub-shell 212, thereby reducing the installation difficulty of the circuit board 300.

[0044] As a specific embodiment, referring to Figure 4 As shown, for example, only part of the edges of the circuit board 300 is clamped between the first sub-shell 211 and the second sub-shell 212, and the other part of the edges of the circuit board 300 is located in the inner cavity of the shell 210.

[0045] In other optional embodiments, the circuit board 300 can also be located in the inner cavity of the shell 210 as a whole, and the first sub-shell 211 and the second sub-shell 212 can be connected by welding or gluing or other non-detachable manners.

[0046] In further embodiments, as shown in Figure 4 and Figure 5 , the first sub-shell 211 is provided with at least two limiting portions 2111, each of which is arranged along the circumference of the first sub-shell 211 and contacts the outer surface of the circuit board 300. In this way, each limiting portion 2111 can limit the movement of the circuit board 300, thereby improving the stability of the circuit board 300.

[0047] It should be noted that the shapes and sizes of the limiting portions 2111 can be the same or different, which is not limited in the embodiments of the present application.

[0048] In actual use, the first sub-shell 211 and the second sub-shell 212, for example, jointly limit the movement of the circuit board 300 in the thickness direction of the circuit board 300, and the limiting portions 2111, for example, jointly limit the movement of the circuit board 300 in the first plane, which is perpendicular to the thickness direction of the circuit board 300.

[0049] In other optional embodiments, the first sub-shell 211 can also not be provided with limiting portions 2111.

[0050] In further embodiments, as shown in Figure 4 and Figure 5 , the side wall of the first sub-shell 211 is provided with a groove 2112, and the circuit board 300 and the groove 2112 jointly form a threading hole 700. In this way, the cable threaded in the threading hole 700 can pass in and out of the threading hole 700 through the slot of the groove 2112, thereby reducing the installation difficulty and maintenance difficulty of the cable in the threading hole 700.

[0051] Optionally, the cable, for example, includes a power line, one end of which is electrically connected to an external power supply, and the other end of which passes through the threading hole 700 and is electrically connected to the circuit board 300 to supply power to the circuit board 300.

[0052] In other optional embodiments, a hole can also be directly punched on the side wall of the first sub-shell 211 to form the threading hole 700 mentioned above.

[0053] In further embodiments, one of the first sub-shell 211 and the second sub-shell 212 is provided with a positioning column 910, and the other is provided with a positioning groove 920, and at least part of the positioning column 910 is located in the positioning groove 920.

[0054] In the embodiment, the relative positions of the first sub-housing 211 and the second sub-housing 212 can be determined conveniently and quickly by means of the positioning column 910 and the positioning groove 920, so that the assembling difficulty of the first sub-housing 211 and the second sub-housing 212 is reduced, and the assembling precision of the first sub-housing 211 and the second sub-housing 212 is improved.

[0055] Alternatively, as shown in Figure 4 and Figure 7 , the second sub-housing 212 is provided with the positioning column 910, and correspondingly, the first sub-housing 211 is provided with the positioning groove 920. Of course, the second sub-housing 212 can also be provided with the positioning groove 920, and correspondingly, the first sub-housing 211 can be provided with the positioning column 910.

[0056] In other optional embodiments, the positioning column 910 and the positioning groove 920 in the foregoing can also not be provided.

[0057] In still further embodiments, as shown in Figure 2 , Figure 4 and Figure 5 , the motor assembly further comprises a first connecting member 410, the first sub-housing 211 is provided with a first protrusion 2113, the first protrusion 2113 extends in a direction close to the second sub-housing 212, the circuit board 300 is located on a side of the first protrusion 2113 facing the second sub-housing 212, and the circuit board 300 is limited and matched with the first protrusion 2113 in the extending direction of the first protrusion 2113, and the second sub-housing 212, the circuit board 300 and the first protrusion 2113 are connected through the first connecting member 410. In other words, the second sub-housing 212, the circuit board 300 and the first sub-housing 211 are connected through the first connecting member 410.

[0058] In the embodiment, the first protrusion 2113 increases the matching area between the circuit board 300 and the first sub-housing 211, so as to improve the stability of the circuit board 300. Furthermore, the first protrusion 2113 provides a connection basis for the connection between the second sub-housing 212, the circuit board 300 and the first sub-housing 211, so as to reduce the assembling difficulty of the motor assembly.

[0059] As a specific implementation, the first connecting member 410 is, for example, a threaded member such as a screw or a bolt. In this case, the first sub-housing 211, the circuit board 300 and the second sub-housing 212 are detachably connected through the first connecting member 410.

[0060] In other optional embodiments, the first sub-housing 211 can also not be provided with the first protrusion 2113.

[0061] In still further embodiments, as shown in Figure 2 , Figure 4 and Figure 5As shown, the motor assembly further comprises a second connecting member 420, the first sub-housing 211 is provided with a second protrusion 2114 extending towards the second sub-housing 212, the circuit board 300 is located on the side of the second protrusion 2114 facing the second sub-housing 212 and is limited in the extending direction of the second protrusion 2114, and the second sub-housing 212, the circuit board 300, the first sub-housing 211 and the housing 110 are connected through the second connecting member 420.

[0062] Similarly, in the present embodiment, the second protrusion 2114 increases the cooperation area between the circuit board 300 and the first sub-housing 211, thereby improving the stability of the circuit board 300. Furthermore, the second protrusion 2114 provides a connection basis for the connection between the second sub-housing 212, the circuit board 300, the first sub-housing 211 and the housing 110, thereby reducing the assembly difficulty of the motor assembly.

[0063] As a specific implementation, the second connecting member 420 is, for example, a threaded member such as a screw or a bolt. In this case, the first sub-housing 211, the circuit board 300, the second sub-housing 212 and the housing 110 are detachably connected through the second connecting member 420.

[0064] In other optional embodiments, the first sub-housing 211 can also not be provided with the second protrusion 2114.

[0065] In further embodiments, as shown in Figure 2 , Figure 4 and Figure 5 , the motor assembly further comprises a third connecting member 430, and the first sub-housing 211 is connected with the housing 110 through the third connecting member 430. After being arranged in this way, when assembling the first sub-housing 211, the second sub-housing 212 and the circuit board 300, the first sub-housing 211 can be connected to the housing 110 in advance, so that the position of the first sub-housing 211 is fixed, and the subsequent installation of the circuit board 300 and the second sub-housing 212 can be more conveniently completed.

[0066] As a specific implementation, the third connecting member 430 is, for example, a threaded member such as a screw or a bolt. In this case, the first sub-housing 211 and the housing 110 are detachably connected through the third connecting member 430.

[0067] In other optional embodiments, there can also be no direct connection relationship between the first sub-housing 211 and the housing 110.

[0068] In an optional embodiment, the motor assembly simultaneously comprises the first connecting member 410, the second connecting member 420 and the third connecting member 430 as described above.

[0069] In this embodiment, during the actual installation process, for example, the first sub-shell 211 is first connected to the outer shell 110 via the third connector 430, and then the second sub-shell 212, the circuit board 300 and the first sub-shell 211 are connected via the first connector 410, and the second sub-shell 212, the circuit board 300, the first sub-shell 211 and the outer shell 110 are connected via the second connector 420, thus completing the assembly of the motor assembly.

[0070] In another embodiment, reference Figures 1 to 5 As shown, the outer casing 110 includes a cylindrical body 111 and a front cover 112. The front cover 112 covers one end of the port of the cylindrical body 111, and the mounting port 1111 includes the other end of the port of the cylindrical body 111. The drive shaft 120 is rotatably connected to the front cover 112. The motor assembly includes a second connector 420 that passes through the cylindrical body 111 and is connected to the front cover 112; and / or, the motor assembly includes a third connector 430 that passes through the cylindrical body 111 and is connected to the front cover 112. In other words, the motor assembly includes at least one of the second connector 420 and the third connector 430. In this way, when the second connector 420 is connected to the front cover 112, the cylinder 111 is sandwiched between the front cover 112 and the first sub-housing 211. The second sub-housing 212, circuit board 300, first sub-housing 211, cylinder 111, and front cover 112 are connected through the second connector 420. This eliminates the need for additional components to connect the front cover 112 to the cylinder 111, reducing the number of components involved in the motor assembly and thus lowering the assembly difficulty. Similarly, when the third connector 430 is connected to the front cover 112, the first sub-housing 211, cylinder 111, and front cover 112 are connected through the third connector 430, again eliminating the need for additional components to connect the front cover 112 to the cylinder 111 and similarly reducing the assembly difficulty of the motor assembly.

[0071] Optionally, the front cover 112 may have a first threaded hole and a second threaded hole, and the second connector 420 may be threaded to the first threaded hole, so that the second sub-housing 212, circuit board 300, first sub-housing 211, cylinder 111 and front cover 112 are connected by the second connector 420. The third connector 430 may be threaded to the second threaded hole, so that the first sub-housing 211, cylinder 111 and front cover 112 are connected by the third connector 430. Normally, in order to connect the motor housing 110 and the motor rear cover, the front cover 112 of the motor is generally provided with a threaded hole. In this embodiment, by reasonably arranging the positions of the second connector 420 and the third connector 430, the original threaded hole on the front cover 112 can be directly used as the first threaded hole or the second threaded hole, which can reduce the processing difficulty of the motor assembly.

[0072] In another embodiment, referring to Figures 1 to 5 illustrated, the motor further comprises a winding and an electrical connecting portion 500, the winding is located in the inner cavity of the housing 110, the electrical connecting portion 500 is electrically connected with the winding, and a part of the electrical connecting portion 500 extends into the inner cavity of the shell 210 and is in conductive contact with the circuit board 300. After being arranged in this way, no additional components are needed to electrically connect the electrical connecting portion 500 with the circuit board 300, so that the number of components involved in the motor assembly is small, thereby simplifying the structure of the motor assembly and reducing the assembly difficulty of the motor assembly.

[0073] In other optional embodiments, the electrical connecting portion 500 and the circuit board 300 can also be electrically connected through a wire.

[0074] In further embodiments, the electrical connecting portion 500 and the circuit board 300 are plug-in matched. After being arranged in this way, the matching between the electrical connecting portion 500 and the circuit board 300 is more reliable, so that the circuit between the electrical connecting portion 500 and the circuit board 300 is not easy to be disconnected under external force impact, thereby reducing the failure rate of the motor assembly.

[0075] In other optional embodiments, only one end of the electrical connecting portion 500 towards the circuit board 300 can be fitted with the circuit board 300.

[0076] In further embodiments, the electrical connecting portion 500 is perpendicular to the circuit board 300. After being arranged in this way, the length of the electrical connecting portion 500 in the center line direction of the transmission shaft 120 is shorter, thereby reducing the cost of the motor assembly.

[0077] In other optional embodiments, the included angle between the electrical connecting portion 500 and the circuit board 300 can also be an acute angle.

[0078] In an optional embodiment, referring to Figure 4 illustrated, in a first direction, the size of the shell 210 is greater than the size of the housing 110, the first direction is perpendicular to the center line direction of the transmission shaft 120, and in the first direction, one side of the shell 210 is flush with one side of the housing 110. Optionally, the first direction is, for example, the direction indicated by the arrow A in Figure 4 illustrated. Under this layout, referring to Figure 4 illustrated, the motor assembly is, for example, roughly L-shaped. After being arranged in this way, in the case where one side of the shell 210 is flush with one side of the housing 110, it means that the shell 210 and the housing 110 are assembled in place, thereby reducing the assembly difficulty of the shell 210 and the housing 110.

[0079] It should be noted that the flush in the embodiment is not absolutely flush, but within the error allowable range, that is, the side surface of the shell 210 is considered to be flush with the side surface of the shell 110. In addition, the size of the shell 210 in the first direction is not limited in the embodiment, and the scheme provided in the embodiment is only illustrative, and in other embodiments, the side surface of the shell 210 can also be not flush with the side surface of the shell 110.

[0080] In an optional embodiment, referring to Figure 6 and Figure 8 As shown, the motor assembly further includes a connecting sleeve 600, the connecting sleeve 600 includes coaxially arranged first and second cylinder segments 610 and 620, the inner diameter of the first cylinder segment 610 is smaller than that of the second cylinder segment 620, one end of the first cylinder segment 610 communicates with one end of the second cylinder segment 620, the first cylinder segment 610 is sleeved on the transmission shaft 120 and synchronously rotates with the transmission shaft 120, the rotating disc 220 is located in the inner cavity of the second cylinder segment 620 and is limitedly matched with the end face of one end of the second cylinder segment 620 facing the first cylinder segment 610 in the center line direction of the second cylinder segment 620, the shell 210 is provided with a through hole 2115 communicating with the inner cavity thereof, and at least part of the second cylinder segment 620 is located in the through hole 2115.

[0081] In the embodiment, the connecting sleeve 600 provides a connection basis for the connection between the rotating disc 220 and the transmission shaft 120, so that the rotating disc 220 can be more conveniently connected to the transmission shaft 120. In addition, the presence of the connecting sleeve 600 makes the connection between the rotating disc 220 and the transmission shaft 120 more reliable. Furthermore, in the embodiment, when the rotating disc 220 is in contact with the end face of one end of the second cylinder segment 620 facing the first cylinder segment 610, it indicates that the rotating disc 220 is installed in place, so that the rotating disc 220 can be more conveniently installed on the connecting sleeve 600.

[0082] As a specific implementation, the transmission shaft 120 is for example in interference fit with the first cylinder segment 610, so that the connecting sleeve 600 synchronously rotates with the transmission shaft 120, the rotating disc 220 is for example in transition fit with the second cylinder segment 620, so that the rotating disc 220 synchronously rotates with the transmission shaft 120, and the center lines of the first cylinder segment 610, the second cylinder segment 620, the transmission shaft 120, the rotating disc 220 and the detection element 800 are for example coincident.

[0083] Further, the through hole 2115 comprises a first hole segment 2115a and a second hole segment 2115b which are connected to each other, the second cylinder segment 620 is located in the first hole segment 2115a for example, and the inner diameter of the first hole segment 2115a is equal to the outer diameter of the second cylinder segment 620 for example, the detection element 800 is arranged towards the first hole segment 2115a, and a bearing is arranged between the hole wall of the second hole segment 2115b and the transmission shaft 120, and the transmission shaft 120 is rotatably connected to the first sub-housing 211 through the bearing.

[0084] In other optional embodiments, the motor assembly can also not comprise the connecting sleeve 600, in which case the rotating disc 220 is directly bonded to the transmission shaft 120 for example.

[0085] In an optional embodiment, the first sub-housing 211 is provided with the through hole 2115 and the limiting portion 2111 in the foregoing simultaneously for example. In actual processing, the through hole 2115 is directly machined on the first sub-housing 211 through machining for example, and the limiting portion 2111 is directly machined on the first sub-housing 211 through machining for example.

[0086] The embodiments of the present application also provide an electrical device comprising the motor assembly described in the foregoing.

[0087] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the specific embodiments described above, and the specific embodiments described above are only illustrative rather than limiting, and those skilled in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, which all belong to the protection of the present application.

Claims

1. An electric machine assembly characterized by, The motor assembly comprises a motor, an encoder and a circuit board. The motor comprises a shell and a transmission shaft, one end of the shell is provided with a mounting opening, and a part of the transmission shaft is located in an inner cavity of the shell. The encoder comprises a housing, a rotating disc and a detection element, the housing shields the mounting opening and is connected with the shell, and the housing is rotationally connected with the transmission shaft, the rotating disc is connected with the transmission shaft and rotates synchronously with the transmission shaft, and the detection element is located in an inner cavity of the housing.

2. The electric machine assembly of claim 1, wherein, The motor assembly further comprises the circuit board, the circuit board is located in the inner cavity of the housing, and the detection element is mounted on the circuit board and electrically connected with the circuit board.

3. The electric machine assembly of claim 2, wherein, The housing comprises a first sub-housing and a second sub-housing, the first sub-housing and the second sub-housing are detachably connected and jointly enclose the inner cavity of the housing, the first sub-housing shields the mounting opening and is rotationally connected with the transmission shaft, and at least a part of edges of the circuit board is clamped between the first sub-housing and the second sub-housing.

4. The electric machine assembly of claim 3, wherein, The first sub-housing is provided with at least two limiting portions, each limiting portion is arranged along a circumferential direction of the first sub-housing, and each limiting portion is in contact with an outer surface of the circuit board. And / or, a side wall of the first sub-housing is provided with a groove, and the circuit board and the groove jointly enclose a threading hole. And / or, one of the first sub-housing and the second sub-housing is provided with a positioning column, and the other is provided with a positioning groove, and at least a part of the positioning column is located in the positioning groove.

5. The electric machine assembly of claim 3, wherein, The motor assembly further comprises a first connecting piece, the first sub-housing is provided with a first protruding portion, the first protruding portion extends in a direction close to the second sub-housing, the circuit board is located on a side of the first protruding portion facing the second sub-housing and is limited and matched with the first protruding portion in an extending direction of the first protruding portion, and the second sub-housing, the circuit board and the first protruding portion are connected through the first connecting piece. And / or, the motor assembly further comprises a second connecting piece (420), the first sub-housing (211) is provided with a second protrusion (2114) extending towards the second sub-housing (212), the circuit board (300) is located on the side of the second protrusion (2114) facing the second sub-housing (212) and is limited in cooperation with the second protrusion (2114) in the extending direction of the second protrusion (2114), and the second sub-housing (212), the circuit board (300), the first sub-housing (211) and the shell (110) are connected through the second connecting piece (420); And / or, the motor assembly further comprises a third connecting piece (430), the first sub-housing (211) is connected with the shell (110) through the third connecting piece (430).

6. The electric machine assembly of claim 5, wherein, The shell (110) comprises a cylinder (111) and a front end cover (112), the front end cover (112) covers the port of one end of the cylinder (111), the mounting port (1111) comprises the port of the other end of the cylinder (111), and the transmission shaft (120) is rotationally connected with the front end cover (112); The motor assembly comprises the second connecting piece (420), the second connecting piece (420) passes through the cylinder (111) and is connected with the front end cover (112); and / or the motor assembly comprises the third connecting piece (430), the third connecting piece (430) passes through the cylinder (111) and is connected with the front end cover (112).

7. The electric machine assembly of claim 2, wherein, The motor further comprises a winding and an electrical connecting part (500), the winding is located in the inner cavity of the shell (110), the electrical connecting part (500) is electrically connected with the winding, and part of the electrical connecting part (500) extends into the inner cavity of the housing (210) and is in conductive contact with the circuit board (300).

8. The electric machine assembly of claim 7, wherein, The electrical connecting part (500) is in plug-in cooperation with the circuit board (300); And / or, the electrical connecting part (500) is perpendicular to the circuit board (300).

9. The electric machine assembly of claim 1, wherein, In the first direction, the size of the housing (210) is greater than the size of the shell (110), the first direction is perpendicular to the center line direction of the transmission shaft (120), and in the first direction, one side surface of the housing (210) is flush with one side surface of the shell (110); And / or, the motor assembly further comprises a connecting sleeve (600), the connecting sleeve (600) comprising a first cylinder segment (610) and a second cylinder segment (620) arranged coaxially, an inner diameter of the first cylinder segment (610) being smaller than an inner diameter of the second cylinder segment (620), one end of the first cylinder segment (610) being in communication with one end of the second cylinder segment (620), the first cylinder segment (610) being sleeved on the transmission shaft (120) and rotating synchronously with the transmission shaft (120), the rotating disc (220) being located in an inner cavity of the second cylinder segment (620) and being limited and matched with an end face of the second cylinder segment (620) towards one end of the first cylinder segment (610) in a center line direction of the second cylinder segment (620), the shell (210) being provided with a through hole (2115) in communication with an inner cavity thereof, at least part of the second cylinder segment (620) being located in the through hole (2115).

10. An electrical device, characterized by The motor assembly as claimed in any one of claims 1-9.

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