Rotary transformer mounting structure and motor

Abstract

The utility model relates to a rotary transformer installation structure and a motor, the rotary transformer installation structure comprises a housing, an installation shaft and an electric plug connector, the housing is detachably connected with the outer side of a motor end cover in a sealing manner, an accommodating space is enclosed between the housing and the motor end cover, and a rotary transformer stator is detachably connected with the housing in the accommodating space. The first end of the mounting shaft is mounted on a rotating shaft of the motor, the second end of the mounting shaft penetrates through the motor end cover and extends into the containing space, a rotor of the rotary transformer is detachably arranged on the mounting shaft, the electric plug connector comprises a first plug connector and a second plug connector which are matched in a plug-in mode, and the first plug connector is electrically connected with the stator. The second plug connector penetrates through the motor end cover and is electrically connected with the motor low-voltage module. According to the rotary transformer mounting structure, the rotary transformer can be disassembled, assembled and maintained under the condition that the motor is not disassembled, the influence on the sealing of the whole motor is avoided, the maintenance difficulty and cost are reduced, and the maintenance efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a rotary transformer mounting structure and a motor. Background Technology

[0002] A rotary transformer is an electromagnetic sensor used in electric motors to measure the angular displacement and angular velocity of the motor shaft.

[0003] A rotary transformer consists of a stator and a rotor. The rotor is mounted on the motor shaft, while the stator is housed inside the motor casing. Therefore, when a rotary transformer malfunctions, there are two main repair methods: one is to replace the entire motor, which is costly and time-consuming; the other is to disassemble the motor and repair or replace the stator or rotor of the internal rotary transformer, which can damage the motor's sealing performance and affect its weather resistance, operational stability, and service life.

[0004] Therefore, how to make rotary transformers easy to maintain, with low maintenance costs, and avoid affecting the weather resistance, operational stability, and service life of motors during maintenance is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The first objective of this utility model is to provide a rotary transformer mounting structure that facilitates maintenance, reduces maintenance costs, and avoids affecting the motor's weather resistance, operational stability, and service life during the maintenance process.

[0006] The second objective of this invention is to provide an electric motor that includes the above-described rotary transformer mounting structure.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A rotary transformer mounting structure is provided for mounting a rotary transformer to a motor, the rotary transformer mounting structure comprising:

[0009] The housing is detachably and sealingly connected to the outside of the motor end cover of the motor, and the housing and the motor end cover of the motor form an accommodating space. The stator of the rotary transformer is detachably connected to the housing, and the stator of the rotary transformer is located within the accommodating space.

[0010] The mounting shaft has a first end coaxially mounted on the motor shaft and a second end extending through the motor end cover into the accommodating space. The rotor of the rotary transformer is coaxially mounted on the mounting shaft and detachably disposed on the mounting shaft.

[0011] An electrical connector, comprising a first connector and a second connector that are mutually plugged into each other, wherein the first connector is electrically connected to the stator of the rotary transformer, and the second connector passes through the motor end cover of the motor and is electrically connected to the low-voltage module of the motor, and the plug end of the second connector for plugging into the first connector extends into the accommodating space.

[0012] In one embodiment of this application, the housing includes:

[0013] The housing is detachably disposed on the outside of the motor end cover of the motor, and the housing has a hollow structure at the position opposite to the mounting shaft;

[0014] A sealing element, wherein the sealing element is detachably and sealingly connected to the housing and seals the hollow structure.

[0015] In one embodiment of this application, the sealing element is a sealing cover plate, or the sealing element is a sealing cover that is closed at one end and open at the other end.

[0016] In one embodiment of this application, the housing is provided with a recess surrounding the hollow structure, the recess being able to at least partially accommodate the seal.

[0017] In one embodiment of this application, the housing includes:

[0018] Annular shell wall;

[0019] An end plate is disposed at one end of the annular shell wall, the hollow structure is disposed on the end plate, and the stator of the rotary transformer is detachably disposed on the end plate and / or the annular shell wall;

[0020] An annular flange is provided at the other end of the annular shell wall. The annular flange extends radially away from the axis of the annular shell wall. The annular flange is detachably and sealingly connected to the motor end cover of the motor.

[0021] In one embodiment of this application, the mounting shaft includes:

[0022] main body;

[0023] A first mounting part is coaxially disposed on a first side of the main body, and a first limiting step surface is formed between the first mounting part and the main body. The rotor of the rotary transformer is detachably mounted on the first mounting part, and the first limiting step surface axially limits the rotor of the rotary transformer.

[0024] In one embodiment of this application, an axial limiting ring is provided on the side of the rotor of the rotary transformer away from the first limiting step surface. The axial limiting ring and the first limiting step surface limit the rotor of the rotary transformer on both sides of the axial direction of the rotor.

[0025] In one embodiment of this application, the mounting shaft further includes a second mounting portion, which is coaxially disposed on the second side of the main body. A second limiting step surface is formed between the second mounting portion and the main body. The second mounting portion is detachably connected to the rotating shaft of the motor. The second limiting step surface is used to cooperate with the shaft end face of the rotating shaft of the motor to axially limit the mounting shaft.

[0026] In one embodiment of this application, a stud is provided in one of the second mounting parts and the rotating shaft of the motor, and a threaded hole is provided in the other of the second mounting parts and the rotating shaft of the motor. The second mounting part and the rotating shaft of the motor are detachably connected by the threaded engagement of the stud and the threaded hole.

[0027] An electric motor, including the rotary transformer mounting structure described above.

[0028] As can be seen from the above technical solution, this utility model discloses a rotary transformer mounting structure for mounting a rotary transformer on a motor. The rotary transformer mounting structure includes a housing, a mounting shaft, and electrical connectors. The housing is detachably and sealed to the outside of the motor end cover of the motor, forming an accommodating space between the housing and the motor end cover. The stator of the rotary transformer is detachably connected to the housing and is located within the accommodating space. The first end of the mounting shaft is coaxially mounted to the motor shaft, and the second end of the mounting shaft extends through the motor end cover into the accommodating space. The rotor of the rotary transformer is coaxially mounted to the mounting shaft and detachably disposed on the mounting shaft. The electrical connectors include a first connector and a second connector that are mutually plugged in. The first connector is electrically connected to the stator of the rotary transformer, and the second connector passes through the motor end cover and is electrically connected to the low-voltage module of the motor. The plug end of the second connector, which is used to plug in with the first connector, extends into the accommodating space.

[0029] The aforementioned rotary transformer mounting structure mounts the rotary transformer outside the motor end cover, forming an independent, detachable part. When the rotary transformer malfunctions, the outer casing can be removed from the motor end cover, and the first and second connectors can be separated. This allows the stator of the rotary transformer to be removed from the motor, exposing the rotor. This enables separate disassembly and repair of the stator and rotor without disassembling the motor, avoiding any impact on the overall motor seal, reducing repair difficulty and cost, and improving repair efficiency.

[0030] The motor provided in this application has the aforementioned rotary transformer mounting structure, and therefore possesses all the technical effects of the aforementioned rotary transformer mounting structure, which will not be elaborated upon here. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the rotary transformer mounting structure provided in an embodiment of the present utility model;

[0033] Figure 2 A schematic diagram of a motor with a rotary transformer mounting structure provided for an embodiment of this utility model.

[0034] In the picture:

[0035] 100 is the outer shell; 101 is the housing; 101a is the hollow structure; 102 is the sealing element;

[0036] 200 is the mounting shaft; 201 is the main body; 202 is the first mounting part; 203 is the second mounting part;

[0037] 300 is an electrical connector; 301 is the first plug connector;

[0038] 400 is the rotary transformer; 401 is the stator; 402 is the rotor;

[0039] 500 is an axial limit retaining ring;

[0040] 600 is the first mounting bolt;

[0041] 700 is the second mounting bolt;

[0042] 800 is the motor; 801 is the shaft; 802 is the motor end cover;

[0043] 900 is a low-voltage module. Detailed Implementation

[0044] One of the core features of this invention is to provide a rotary transformer mounting structure. The structural design of this rotary transformer mounting structure makes it easy to maintain, reduces maintenance costs, and avoids the maintenance process from affecting the motor's weather resistance, operational stability, and service life.

[0045] Another core aspect of this invention is to provide a motor that includes the aforementioned rotary transformer mounting structure.

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0047] The rotary transformer 400 is a sensor based on the law of electromagnetic induction. It consists of a stator 401 and a rotor 402. The rotor 402 is mounted on the shaft 801 of the motor 800 and rotates with the shaft 801 of the motor 800. The stator 401 is fixedly set. Both the stator 401 and the rotor 402 have winding structures. The working principle of the rotary transformer 400 is basically similar to that of an ordinary transformer. The stator 401, as the primary side of the rotary transformer 400, receives an excitation voltage to generate a rotating magnetic field. As the rotation angle changes, the rotor 402 passes through different magnetic fluxes in the rotating magnetic field, thereby inducing different magnitudes of electromotive force in the conductor.

[0048] When the rotor 402 rotates with the shaft 801 of the motor 800, the relative positions of the stator 401 and the rotor 402 change, and the magnitude of its output voltage changes with the angular displacement of the rotor 402. By detecting the magnitude and direction of the electromotive force induced in the rotor 402, the rotation angle of the rotor can be calculated. Therefore, the rotary transformer 400 is an important component of the motor 800, and its reliable and effective operation must be ensured. Thus, it needs to be easy to replace and maintain.

[0049] Based on this, the embodiments of this application provide a rotary transformer mounting structure that is easy to maintain.

[0050] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the rotary transformer mounting structure provided in an embodiment of the present invention. Figure 2 A schematic diagram of a motor with a rotary transformer mounting structure provided for an embodiment of this utility model.

[0051] The rotary transformer mounting structure is used to mount the rotary transformer 400 onto the motor 800, and includes a housing 100, a mounting shaft 200, and an electrical connector 300. The housing 100 is detachably and sealingly connected to the outside of the motor end cover 802 of the motor 800. The outside of the motor end cover 802 refers to the side of the motor end cover 802 away from the inner cavity of the motor 800, which houses the stator of the motor 800, i.e., the outer surface of the motor end cover 802. The housing 100 and the motor end cover 802 of the motor 800 form an accommodating space.

[0052] The stator of the rotary transformer 400 is detachably connected to the housing 100, and the stator of the rotary transformer 400 is located within the accommodating space. The first end of the mounting shaft 200 is coaxially mounted to the rotating shaft 801 of the motor 800. The second end of the mounting shaft 200 extends through the motor end cover 802 of the motor 800 into the accommodating space. To facilitate the second end of the mounting shaft 200 extending into the accommodating space, the motor end cover 802 is provided with an axially penetrating mounting hole. The rotor of the rotary transformer 400 is coaxially mounted to the mounting shaft 200 and detachably mounted thereon. The stator and rotor of the rotary transformer 400 are coaxially arranged. In this application, the rotary transformer 400 can be adopted as follows: Figure 1 The arrangement shown, in which the stator is sleeved outside the rotor, can also be an arrangement in which the stator and rotor are spaced apart along the axial direction.

[0053] The electrical connector 300 includes a first connector 301 and a second connector that are mutually plugged in. One of the first connector 301 and the second connector has a male plug end and the other has a female plug end. The first connector 301 is electrically connected to the stator of the rotary transformer 400. The second connector passes through the motor end cover 802 of the motor 800 and is electrically connected to the low-voltage module 900 of the motor 800. The plug end of the second connector, which is used to plug in and mate with the first connector 301, extends into the receiving space.

[0054] Compared with the prior art, the rotary transformer mounting structure provided in this embodiment of the utility model installs the rotary transformer 400 outside the motor end cover 802 of the motor 800, forming an independent detachable part. When the rotary transformer 400 fails, the outer casing 100 can be removed from the motor end cover 802, and the first plug connector 301 and the second plug connector can be separated, thereby allowing the stator part of the rotary transformer 400 to be removed from the motor 800 and exposing the rotor part of the rotary transformer 400. In this way, the stator and rotor of the rotary transformer 400 can be disassembled and repaired separately without disassembling the motor 800, avoiding the impact on the overall sealing of the motor 800, reducing the difficulty and cost of maintenance, and improving maintenance efficiency.

[0055] It should be noted that, in the embodiments of this application, the outer shell 100 may be made of metal or polymer materials. Metal materials include, but are not limited to, cast iron, stainless steel, aluminum alloy, etc., and polymer materials include, but are not limited to, ABS, PA, PC, etc.

[0056] Structurally, the outer shell 100 can be a one-piece structure or a split structure, such as... Figure 1 As shown, in one embodiment of this application, the outer shell 100 adopts a split structure. The outer shell 100 includes a housing 101 and a sealing member 102. The housing 101 is detachably disposed on the outside of the motor end cover 802 of the motor 800. A hollow structure 101a is provided at the position of the housing 101 opposite to the mounting shaft 200. The sealing member 102 is detachably and sealingly connected to the housing 101 and seals the hollow structure 101a.

[0057] It should be noted that the housing 101 and the seal 102 can be made of the same material or different materials. For example, the housing 101 and the seal 102 can both be made of opaque metal material. In this case, the location of the seal 102 serves as an inspection port. Users can remove the seal 102 to inspect the rotor of the rotary transformer 400 in the accommodating space. Alternatively, the seal 102 can be made of transparent polymer material. In this way, the location of the seal 102 can not only serve as an inspection port but also as an observation window, allowing users to observe the situation inside the accommodating space without removing the seal 102.

[0058] To facilitate the maintenance of the rotor of the rotary transformer 400 within the accommodating space, in one embodiment of this application, such as... Figure 1 As shown, the diameter of the hollow structure 101a is larger than the diameter of the rotor, so that when the user removes the seal 102, the entire rotor can be exposed for maintenance and replacement.

[0059] The shape of the seal 102 is determined by the relative position of the mounting shaft 200 and the housing 101. For example, when there is a gap between the end of the mounting shaft 200 away from the rotating shaft 801 of the motor 800 and the end of the housing 101 away from the motor end cover 802, the seal 102 is a sealing cover plate, that is, the seal 102 is flat. Figure 1 As shown, the sealing cover is provided with a plurality of circumferentially distributed first mounting holes, and the housing 101 is provided with a plurality of circumferentially distributed second mounting holes around the hollow structure 101a. The first mounting holes are through holes, and the second mounting holes are threaded holes. The first mounting bolt 600 passes through the first mounting hole and engages with the threaded second mounting hole to install the sealing cover to the housing 101.

[0060] However, when the end of the mounting shaft 200 away from the motor 800, the rotating shaft 801, extends out from the hollow structure 101a, the seal 102 is a sealing cover with one end closed and the other end open, to accommodate the end of the mounting shaft 200 away from the motor 800, the rotating shaft 801.

[0061] To achieve a seal between the housing 101 and the motor end cover 802, one or more sealing rings are provided between the housing 101 and the motor end cover 802. At the same time, to facilitate the fixing of the sealing rings, at least one of the mating surfaces of the housing 101 and the motor end cover 802 is provided with an annular groove surrounding the assembly hole. The sealing ring is fixed in the annular groove. When the housing 101 is installed on the motor end cover 802, the housing 101 and the motor end cover 802 cooperate to compress the sealing ring and deform it to achieve a seal.

[0062] To facilitate the installation of the housing 101, in one embodiment of this application, the housing 101 is provided with a recessed groove surrounding the hollow structure 101a. The recessed groove can at least partially accommodate the sealing element 102, thereby limiting the sealing element 102 during the installation of the housing 101 and the sealing element 102. It also allows for multiple mating surfaces in different directions between the housing 101 and the sealing element 102, and sealing structures such as sealing rings can be provided between the mating surfaces in different directions to improve the sealing performance between the two.

[0063] Of course, the above-mentioned fitting method can also be used between the housing 101 and the motor end cover 802, that is, a groove surrounding the mounting hole is provided on the motor end cover 802, and the groove can at least partially accommodate the housing 101. Thus, when the housing 101 is installed on the motor end cover 802, the housing 101 can be limited, and there are multiple mating surfaces in different directions between the housing 101 and the motor end cover 802. Sealing structures such as sealing rings can be provided between the mating surfaces in different directions to improve the sealing performance between the two.

[0064] Specifically, such as Figure 1 As shown, in one embodiment of this application, the housing 101 includes an annular shell wall, an end plate, and an annular flange. The annular shell wall is a rotating body that rotates around an axis. The end plate is disposed at one end of the annular shell wall, that is, the end of the annular shell wall away from the motor end cover 802. The hollow structure 101a is disposed on the end plate. The stator of the rotary transformer 400 is detachably disposed on the end plate and / or the annular shell wall. That is, the stator of the rotary transformer 400 can be disposed only on the end plate, or only on the annular shell wall, or the stator of the rotary transformer 400 can be disposed at the junction of the annular shell wall and the end plate, and connected to the annular shell wall and the end plate respectively.

[0065] An annular flange is located at the other end of the annular shell wall, that is, at the end of the annular shell 101 near the motor end cover 802. The annular flange is mainly used to form a flange structure by opening holes to facilitate the connection between the shell 101 and the motor end cover 802. Specifically, multiple third mounting holes are evenly distributed circumferentially on the annular flange, and the same number of fourth mounting holes are evenly distributed circumferentially on the motor end cover 802. The third mounting holes are through holes, and the fourth mounting holes are threaded holes. The second mounting bolt 700 passes through the third mounting hole and engages with the threaded fourth mounting hole to install the shell 101 onto the motor end cover 802. The annular flange extends radially away from the axis of the annular shell wall, and the annular flange and the motor end cover 802 of the motor 800 are detachably and sealingly connected.

[0066] When a groove is provided on the motor end cover 802, the groove can at least accommodate the annular flange, and the shape of the groove is adapted to the annular flange.

[0067] like Figure 1 As shown, for ease of installation, in one embodiment of this application, the mounting shaft 200 is a stepped shaft structure, that is, the mounting shaft 200 includes a main body 201 and a first mounting part 202, wherein the diameter of the main body 201 is larger than that of the first mounting part 202, the first mounting part 202 is coaxially disposed on the first side of the main body 201, and a first limiting step surface is formed between the first mounting part 202 and the main body 201, the rotor of the rotary transformer 400 is detachably mounted on the first mounting part 202, and the first limiting step surface axially limits the rotor of the rotary transformer 400.

[0068] Further optimize the above technical solutions, such as Figure 1 As shown, an axial limiting ring 500 is provided on the side of the rotor of the rotary transformer 400 away from the first limiting step surface. The axial limiting ring 500 and the first limiting step surface limit the rotor of the rotary transformer 400 on both sides of the axial direction, thereby effectively limiting the rotor of the rotary transformer 400 in both the axial and radial directions and preventing the rotor of the rotary transformer 400 from loosening.

[0069] like Figure 1 As shown, the mounting shaft 200 also includes a second mounting part 203, which is coaxially disposed on the second side of the main body 201. The diameter of the second mounting part 203 is smaller than the diameter of the main body 201. A second limiting step surface is formed between the second mounting part 203 and the main body 201. The second mounting part 203 is detachably connected to the rotating shaft 801 of the motor 800. The second limiting step surface is used to cooperate with the shaft end face of the rotating shaft 801 of the motor 800 to axially limit the mounting shaft 200.

[0070] The second mounting part 203 and the rotating shaft 801 of the motor 800 can be installed in various ways. For example, one of the second mounting part 203 and the rotating shaft 801 of the motor 800 is provided with a stud, and the other of the second mounting part 203 and the rotating shaft 801 of the motor 800 is provided with a screw hole. The second mounting part 203 and the rotating shaft 801 of the motor 800 are detachably connected by the threaded engagement of the stud and the screw hole.

[0071] Specifically, in Figure 1 and Figure 2 In the illustrated embodiment, the second mounting part 203 is a stud, and the rotating shaft 801 of the motor 800 has a threaded hole along the axial direction. To further improve the stability of the connection between the second mounting part 203 and the rotating shaft 801 of the motor 800, and to prevent the mounting shaft 200 from loosening during the rotation of the rotating shaft 801 of the motor 800, in one embodiment of this application, a locking member is also included. The locking member is a locking bolt. The rotating shaft 801 of the motor 800 has a locking threaded hole along the radial direction. The locking threaded hole communicates with the aforementioned threaded hole. The locking bolt passes through the locking threaded hole and presses against the mounting shaft 200 to prevent the mounting shaft 200 from moving relative to the rotating shaft 801 of the motor 800.

[0072] like Figure 2 As shown in the figure, this application embodiment also provides a motor 800, which includes the rotary transformer mounting structure as described in the above embodiment. Since the motor 800 adopts the rotary transformer mounting structure in the above embodiment, the technical effect of the motor 800 can be referred to the above embodiment.

[0073] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0074] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0075] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0076] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A rotary transformer mounting structure for mounting a rotary transformer (400) onto a motor (800), characterized in that, The rotary transformer mounting structure includes: The housing (100) is detachably and sealed to the outside of the motor end cover (802) of the motor (800), and the housing (100) and the motor end cover (802) of the motor (800) form an accommodating space. The stator (401) of the rotary transformer (400) is detachably connected to the housing (100), and the stator (401) of the rotary transformer (400) is located within the accommodating space. Mounting shaft (200), the first end of which is coaxially mounted on the rotating shaft (801) of the motor (800), the second end of which passes through the motor end cover (802) of the motor (800) and extends into the accommodating space, the rotor (402) of the rotary transformer (400) is coaxially mounted on the mounting shaft (200) and detachably disposed on the mounting shaft (200). An electrical connector (300) includes a first connector (301) and a second connector that are mutually plugged in. The first connector (301) is electrically connected to the stator (401) of the rotary transformer (400). The second connector passes through the motor end cover (802) of the motor (800) and is electrically connected to the low-voltage module (900) of the motor (800). The plug end of the second connector for plugging in with the first connector (301) extends into the accommodating space.

2. The rotary transformer mounting structure according to claim 1, characterized in that, The housing (100) includes: The housing (101) is detachably disposed on the outside of the motor end cover (802) of the motor (800), and the housing (101) is provided with a hollow structure (101a) at the position opposite to the mounting shaft (200). A sealing element (102) is detachably and sealingly connected to the housing (101) and seals the hollow structure (101a).

3. The rotary transformer mounting structure according to claim 2, characterized in that, The sealing element (102) is a sealing cover plate, or the sealing element (102) is a sealing cover that is closed at one end and open at the other end.

4. The rotary transformer mounting structure according to claim 2, characterized in that, The housing (101) is provided with a recess surrounding the hollow structure (101a), the recess being able to at least partially accommodate the seal (102).

5. The rotary transformer mounting structure according to any one of claims 2-4, characterized in that, The housing (101) includes: Annular shell wall; An end plate is disposed at one end of the annular shell wall, the hollow structure (101a) is disposed on the end plate, and the stator (401) of the rotary transformer (400) is detachably disposed on the end plate and / or the annular shell wall; An annular flange is provided at the other end of the annular shell wall. The annular flange extends radially away from the axis of the annular shell wall. The annular flange is detachably and sealingly connected to the motor end cover (802) of the motor (800).

6. The rotary transformer mounting structure according to any one of claims 1-4, characterized in that, The mounting shaft (200) includes: Main body (201); The first mounting part (202) is coaxially disposed on the first side of the main body (201) and the main body (201). A first limiting step surface is formed between the first mounting part (202) and the main body (201). The rotor of the rotary transformer (400) is detachably mounted on the first mounting part (202). The first limiting step surface axially limits the rotor of the rotary transformer (400).

7. The rotary transformer mounting structure according to claim 6, characterized in that, An axial limiting ring (500) is provided on the side of the rotor of the rotary transformer (400) away from the first limiting step surface. The axial limiting ring (500) and the first limiting step surface limit the rotor of the rotary transformer (400) on both sides of the axial direction.

8. The rotary transformer mounting structure according to claim 6, characterized in that, The mounting shaft (200) further includes a second mounting part (203), which is coaxially disposed on the second side of the main body (201) with the main body (201). A second limiting step surface is formed between the second mounting part (203) and the main body (201). The second mounting part (203) is detachably connected to the rotating shaft (801) of the motor (800). The second limiting step surface is used to cooperate with the shaft end face of the rotating shaft (801) of the motor (800) to axially limit the mounting shaft (200).

9. The rotary transformer mounting structure according to claim 8, characterized in that, The second mounting part (203) is provided with a stud in one of the shafts (801) of the motor (800), and the second mounting part (203) is provided with a screw hole in the other of the shafts (801) of the motor (800). The second mounting part (203) and the shafts (801) of the motor (800) are detachably connected by the stud and the screw hole through the threaded engagement.

10. An electric motor, characterized in that, Includes the rotary transformer mounting structure as described in any one of claims 1-9.

Images