A housing mounting assembly and motor arrangement

Abstract

The application provides a casing mounting assembly and a motor device, which comprises a casing assembly and a base assembly, the casing assembly comprises a casing body and a threaded part embedded in the casing body, the threaded part is provided with an inner threaded hole, the casing body is a die casting part, and the wear resistance and hardness of the threaded part are higher than those of the casing body; the base assembly comprises a base body and a limiting part embedded in the base body, the base body is a die casting part, the limiting part has a through hole, and the wear resistance and hardness of the limiting part are higher than those of the base body; when the casing assembly and the base assembly are combined together, the through hole corresponds to the inner threaded hole, a screw is inserted into the inner threaded hole, and the material of the screw is the same as that of the threaded part, so that the technical problem of poor connection stability between a casing and a base in the prior art can be solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electric machines, and particularly relates to a shell mounting assembly and an electric machine device. BACKGROUND

[0002] The current industrial electric machine is designed according to the center height to develop different base structure members to meet the installation requirements. The structure members are designed according to the actual application scene to correspond to the lightweight design, and the cast aluminum structure is adopted to meet the load requirements. The whole machine structure member can be cast separately, and then assembled. That is, the machine shell and the bottom foot are cast separately, and then assembled. The machine shell and the bottom foot are cast separately, and then assembled. This way not only can increase the contact area, improve the support stability and disperse the support force, but also can further reduce the mechanical resonance and reduce the hidden danger of structural failure and increased vibration noise caused by resonance. At the same time, the cast structure is more easily realized from the structure design and mold implementation. Figure 14 and Figure 15 As shown in the prior art, the machine shell and the bottom foot are connected together by screws after assembly. Since the material of the screw is different from that of the cast aluminum member, the connection between the screw and the machine shell will be loose due to vibration and other reasons during the operation of the electric machine, which will reduce the connection stability between the machine shell and the bottom.

[0003] How to improve the connection stability between the machine shell and the bottom is a technical problem to be solved at present. SUMMARY

[0004] The present application provides a shell mounting assembly and an electric machine device, which can solve the technical problem of poor connection stability between the machine shell and the bottom in the prior art.

[0005] In one aspect, the present application provides a shell mounting assembly, which comprises a machine shell assembly and a bottom assembly. The machine shell assembly comprises a machine shell body and a threaded member embedded in the machine shell body. The threaded member is provided with an internal threaded hole. The machine shell body is a die casting member. The wear resistance and hardness of the threaded member are higher than those of the machine shell body. The bottom assembly comprises a bottom body and a limiting member embedded in the bottom body. The bottom body is a die casting member. The limiting member has a through hole. The wear resistance and hardness of the limiting member are higher than those of the bottom body. When the machine shell assembly and the bottom assembly are combined together, the through hole corresponds to the internal threaded hole. A screw is inserted into the through hole and the internal threaded hole. The material of the screw is the same as that of the threaded member.

[0006] In some embodiments, the outer wall of the threaded member is provided with a limiting rib.

[0007] In some embodiments, the limiting ribs include a first outer spiral rib, the rotation direction of the first outer spiral rib being opposite to the rotation direction of the threads of the inner threaded hole.

[0008] In some embodiments, the limiting ribs include a second outer spiral rib, the rotation direction of the second outer spiral rib being the same as the rotation direction of the threads of the inner threaded hole.

[0009] In some embodiments, the limiting ribs include a plurality of inclined ribs, the plurality of inclined ribs extending simultaneously along the circumferential direction and the axial direction of the outer surface of the threaded member.

[0010] In some embodiments, the limiting ribs include an annular reinforcing rib, the annular reinforcing rib surrounding the threaded member.

[0011] and / or,

[0012] The outer wall of the threaded member is provided with an axial reinforcing rib, the axial reinforcing rib extending along the axial direction of the threaded member.

[0013] In some embodiments, the outer wall of the limiting member is provided with an annular groove, the annular groove surrounding the limiting member.

[0014] In some embodiments, the cabinet body is provided with a first surface for abutting against the base body, the threaded member includes a limiting end protruding from the first surface; the base body is provided with a second surface for abutting against the cabinet body.

[0015] The limiting member is provided with an annular groove, when the first surface and the second surface abut against each other, the limiting end is inserted into the annular groove.

[0016] In some embodiments, a gasket is arranged between the first surface and the second surface, the material of the gasket is the same as the material of the threaded member, or the material of the gasket is the same as the material of the limiting member.

[0017] In some embodiments, one of the first surface and the second surface is provided with a first protruding structure, and the other is provided with a first recessed structure, the first protruding structure is adapted to the first recessed structure.

[0018] In some embodiments, the outer wall surface of the threaded member is provided with a second protruding structure and / or a second recessed structure, and the outer wall surface of the limiting member is provided with a third protruding structure and / or a third recessed structure.

[0019] The application also provides an electric machine device, including a stator and the housing mounting assembly, the stator being arranged in the cabinet body.

[0020] The application sets the screw in the shell body, sets the limiting piece in the base body, and connects the shell body and the base body together through the screw thread connection of the screw passing through the through hole of the limiting piece, so that the wear resistance and hardness of the screw and the limiting piece are relatively high, and the connection precision between the shell body and the base body is higher and the stability is better. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. The drawings in the following description are only exemplary, and other embodiments can be derived from the provided drawings without paying creative labor for those skilled in the art.

[0022] Figure 1 is a schematic view of the motor of the embodiment of the present application provided with a steel wire screw sleeve;

[0023] Figure 2 is a schematic view of the steel wire screw sleeve structure of the embodiment of the present application; Figure 1 is an enlarged view of A in the above figure;

[0024] Figure 3 is a schematic view of the motor of the embodiment of the present application provided with a screw;

[0025] Figure 4 is a schematic view of the motor of the embodiment of the present application provided with a screw;

[0026] Figure 5 is a schematic view of the screw of the embodiment of the present application; Figure 4 is an enlarged view of B in the above figure;

[0027] Figure 6 is an inclined view of the screw of the embodiment of the present application;

[0028] Figure 7 is a schematic view of the outer wall of the screw of the embodiment of the present application provided with an inclined rib;

[0029] Figure 8 is an axial schematic view of the outer wall of the screw of the embodiment of the present application provided with an axial reinforcing rib;

[0030] Figure 9 is a radial schematic view of the outer wall of the screw of the embodiment of the present application provided with an axial reinforcing rib;

[0031] Figure 10 is an inclined view of the limiting piece of the embodiment of the present application;

[0032] Figure 11 is a radial partial sectional view of the limiting piece of the embodiment of the present application;

[0033] Figure 12 is a schematic view of the outer wall of the limiting piece of the embodiment of the present application provided with annular protrusions;

[0034] Figure 13 is a schematic view of the first plane provided with the first protrusion structure and the second plane provided with the first recess structure of the embodiment of the present application;

[0035] Figure 14 is an exploded view of the motor body and the base of the prior art;

[0036] Figure 15 is a schematic view of the motor body and the base of the prior art fitted together;

[0037] The reference signs are:

[0038] 1, housing assembly; 101, housing body; 1011, first surface; 2, base assembly; 201, base body; 2011, second surface; 3, threaded part; 301, first outer spiral rib; 302, inner threaded hole; 303, axial reinforcing rib; 304, inclined rib; 305, limiting end; 4, limiting piece; 401, annular groove; 402, ring groove; 403, annular rib; 5, screw; 6, steel wire screw sleeve; 701, first protrusion structure; 702, second protrusion structure. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0040] In the description of the present application, it should be understood that the orientation words such as “front, back, up, down, left, right”, “transverse, vertical, perpendicular, horizontal” and “top, bottom” and the like indicate the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words “inner, outer” refer to the inner and outer of the contour of each component itself.

[0041] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0042] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0043] See also Figures 1-13 As shown, the present invention provides a shell mounting assembly, including a casing assembly 1 and a base assembly 2, the casing assembly 1 including a casing body 101 and a threaded member 3 embedded in the casing body 101, the threaded member 3 is provided with an internal threaded hole 302, the casing body 101 is a die-casting, and the wear resistance and hardness of the threaded member 3 are higher than the wear resistance and hardness of the casing body 101; the base assembly 2 includes a base body 201 and a limit member 4 embedded in the base body 201, the base body 201 is a die-casting, the limit member 4 has a through hole, and the wear resistance and hardness of the limit member 4 are higher than the wear resistance and hardness of the base body 201; when the casing assembly 1 and the base assembly 2 are combined together, the through hole corresponds to the internal threaded hole 302, and a screw 5 is inserted into the through hole and the internal threaded hole 302, and the material of the screw 5 is the same as that of the threaded member 3.

[0044] By embedding threaded member 3 within housing body 101 and providing stopper 4 on base body 201, both threaded member 3 and stopper 4 exhibit higher wear resistance and hardness than die-cast materials. When housing assembly 1 and base assembly 2 are assembled, screw 5, made of the same material as threaded member 3, is inserted into the threaded hole, enhancing the secure connection between the two.

[0045] Since the wear resistance and hardness of the threaded part 3 are higher than those of the casing body 101, the precision of the internal threaded hole 302 provided on the threaded part 3 is higher than that of the threaded structure provided on the die casting when being processed. Thus, the precision of the thread itself is higher, and the precision of the threaded connection is improved.

[0046] When the casing body 101 is die cast, the threaded part 3 is arranged at a specific position in the mold, and then the die casting operation is performed. Similarly, when the base is die cast, the limiting part 4 is arranged at a specific position in the mold, and then the die casting operation is performed. The threaded part 3 itself has an internal thread, and after the die casting is completed, the thread does not need to be processed, and the thread surface of the casting is reduced. Since the contact surface precision between the threaded part 3 and the limiting part 4 is high, and the contact surface precision between the casing body 101 and the base body 201 is low, the size of the casing assembly 1 and the base assembly 2 is mainly determined by the casing body 101 and the base body 201, and the fitting precision is determined by the threaded part 3 and the limiting part 4. Thus, the casing body 101 and the base body 201 do not need to be reprocessed to improve the precision, the fitting surface processing procedure between the two die castings is reduced, thereby further reducing the positioning deviation caused by multiple processing of the product, and reducing the processing cost.

[0047] The axial direction of the present application refers to the axial direction of the threaded part 3, the circumferential direction refers to the circumferential direction of the threaded part 3, and the radial direction refers to the radial direction of the threaded part 3.

[0048] Preferably, as shown in Figure 3 、 Figures 6-9 The outer wall of the threaded part 3 is provided with a limiting rib.

[0049] By providing the limiting rib on the outer wall of the threaded part 3, the firmness of the threaded part 3 in the casing body 101 is improved, and the stability of the connection between the casing body 101 and the base is improved.

[0050] During the insertion and rotation of the screw 5 into the threaded part 3, the threaded part 3 has a circumferential torsion force, and when it is rotated to the bottom, the threaded part 3 has a larger axial tension. By providing the limiting rib, the threaded part 3 is prevented from rotating in the casing body 101, and the threaded part 3 is prevented from being axially displaced under the action of the tension.

[0051] Preferably, the limiting rib includes a first outer spiral rib 301, and the rotation direction of the first outer spiral rib 301 is opposite to that of the thread of the internal threaded hole 302.

[0052] The rotation direction of the first outer spiral rib 301 is opposite to that of the internal threaded hole 302. Thus, when the screw 5 is inserted into the internal threaded hole 302 and rotated, the threaded part 3 has a tendency to rotate in the opposite direction of the screw 5 under the action of the first outer threaded rib 301, which is beneficial to the rotation and tightening between the screw 5 and the threaded part 3.

[0053] Preferably, as shown in Figure 3 The limiting rib includes a second outer spiral rib, and the rotation direction of the second outer spiral rib is the same as the rotation direction of the threads of the inner threaded hole 302.

[0054] The rotation direction of the second outer spiral rib is the same as the rotation direction of the threads of the inner threaded hole 302. When the screw 5 rotates in the inner threaded hole 302, the circumferential force generated by the screw 5 on the threaded part 3 will make the threaded part 3 move towards the inside of the cabinet body 101, so that the threaded part 3 will not be rotated and fallen out of the cabinet body 101 during the rotation of the screw 5. The second outer spiral rib has an axial and circumferential limiting effect on the threaded part 3. When the screw 5 is rotated to the bottom to generate a pulling force on the threaded part 3, the second outer spiral rib has an axial limiting effect, preventing the threaded part 3 from falling out of the cabinet. Similarly, the screw 5 generates a circumferential force on the threaded part 3 during rotation. Due to the same rotation direction of the second outer spiral rib and the inner threaded hole 302, the threaded part 3 has a tendency to rotate in the circumferential direction under the action of the circumferential force, but the threaded part 3 is die-cast in the cabinet and cannot move inward, which also has an axial limiting effect on the threaded part 3.

[0055] The provision of the second outer spiral rib is also beneficial for the cabinet body 101 during the die-casting process, when the molten metal covers the threaded part 3. The molten metal can flow along the second outer spiral rib, thereby improving the fit between the molten metal and the outer wall surface of the threaded part 3, and improving the connection firmness between the threaded part 3 and the cabinet body 101.

[0056] Further, the threaded part 3 can be a standard steel wire sleeve 6; or a metal block can be reprocessed.

[0057] Preferably, as shown in Figure 6 and Figure 7 The limiting rib includes a plurality of inclined ribs 304, and the plurality of inclined ribs 304 extend along the circumferential and axial directions of the outer surface of the threaded part 3.

[0058] As shown in Figure 6 By providing inclined ribs, the inclined ribs can limit and fix the threaded part 3 in the axial direction and the circumferential direction.

[0059] Preferably, the limiting rib includes an annular reinforcing rib, and the annular reinforcing rib surrounds the threaded part 3 once.

[0060] and / or,

[0061] The outer wall of the threaded part 3 is provided with an axial reinforcing rib 303, and the axial reinforcing rib 303 extends along the axial direction of the threaded part 3.

[0062] The annular reinforcing rib can strengthen the screw 3 in the circumferential direction and limit the screw 3 in the axial direction, preventing the screw 3 from being pulled out of the main body 101 under the action of the screw 5.

[0063] As shown in Figure 8 and Figure 9 , the axial reinforcing rib 303 can strengthen the screw 3 in the axial direction and limit the screw 3 in the circumferential direction, preventing the screw 3 from rotating in the main body 101.

[0064] Preferably, as shown in Figure 10 and Figure 11 , the outer wall of the limiting member 4 is provided with an annular groove 401 surrounding the screw 3.

[0065] The annular groove 401 can limit the limiting member 4 in the axial direction, preventing the limiting member 4 from falling off the base body 201.

[0066] Further, the outer diameter of the limiting member 4 is larger than the outer diameter of the nut of the screw 5, for example, 2mm larger, so that the nut of the screw 5 and the limiting member 4 have sufficient contact area, ensuring the friction between the screw 5 and the foot assembly.

[0067] The annular groove 401 can reduce the processing cost and be suitable for smaller stress environment.

[0068] The shape of the annular groove 401 in the cross section through the axis of the limiting member 4 can be rectangular, triangular, trapezoidal or semicircular.

[0069] As shown in Figure 12 , the outer wall of the limiting member 4 can also be provided with an annular rib 403, which can increase the bonding area between the limiting member 4 and the base body 201, and the combination of the limiting member 4 and the base body 201 is more stable. Meanwhile, the annular rib 403 can also strengthen the circumferential structural strength of the limiting member 4.

[0070] Preferably, as shown in Figure 2 and Figure 13 , the main body 101 is provided with a first surface 1011 for pressing against the base body 201, and the screw 3 includes a limiting end 305 extending out of the first surface 1011; the base body 201 is provided with a second surface 2011 for pressing against the main body 101.

[0071] The limiting member 4 is provided with an annular groove 402 , and when the first surface 1011 and the second surface 2011 are pressed against each other, the limiting end 305 is inserted into the annular groove 402 .

[0072] When the limiting end 305 is inserted into the annular groove 402, a radial limit is formed between the base body 201 and the casing body 101, which is not only conducive to the alignment of the internal threaded hole 302 with the through hole, but also can be limited in the radial direction after being firmly fixed, to prevent the casing body 101 from moving relative to the base body 201 along the plane where the first surface 1011 is located.

[0073] The first surface 1011 and the second surface 2011 are pressed and fitted with each other, which improves the consistency of the product. The limiting end 305 is inserted into the annular groove 402, which can improve the accuracy and stability of the center height of the casing body 101, which is beneficial to the installation and matching of the motor.

[0074] The fit between first surface 1011 and second surface 2011 improves the precision of the fit between housing body 101 and base body 201, ensuring balanced force between the two surfaces. This reduces vibration wear and loosening caused by uneven assembly, improving long-term product reliability and load balance. Furthermore, the high degree of assembly fit prevents rapid failure of the installation caused by vibration during operation under load after a false installation.

[0075] Furthermore, the limiting end 305 is annular, and the outer wall surface of the limiting end 305 is interference fit with the inner wall surface of the annular groove 402. The limiting end 305 extends into the annular groove 402 and does not contact the bottom surface of the annular groove 402, thereby preventing obstruction of the fit between the first surface 1011 and the second surface 2011.

[0076] Preferably, a gasket is provided between the first surface 1011 and the second surface 2011 , and the material of the gasket is the same as that of the threaded member 3 , or the material of the gasket is the same as that of the limiting member 4 .

[0077] The material of the gasket is the same as that of at least one of the screw member 3 and the stopper 4. When the screw member 3 and the stopper 4 are made of the same material, the gasket, the screw member 3, and the stopper 4 are all made of the same material. Providing the gasket between the two surfaces improves the fit between the gasket and the first surface 1011 and the fit between the gasket and the second surface 2011, thereby increasing the firmness of the connection between the housing body 101 and the base body 201.

[0078] Preferably, Figure 13 As shown, one of the first surface 1011 and the second surface 2011 is provided with a first protruding structure 701 , and the other is provided with a first concave structure, and the first protruding structure is adapted to fit with the first concave structure.

[0079] Through the cooperation between the first protrusion and the first recess, the preliminary limiting between the base body and the chassis body 201 is realized, when the position accuracy requirement between the shell body 101 and the chassis body 201 is not very high, the limiting through this way can be carried out. Further, when the cooperation accuracy between the shell and the chassis is required to be high, the first pin hole is arranged on the first surface 1011, the second pin hole is arranged on the second surface 2011, and the high-precision cooperation between the shell body 101 and the chassis body 201 is realized by inserting the pin into the first pin hole and the second pin hole. The specific process is that the primary limiting is carried out through the first protrusion structure 701 and the first recess structure first, at this time, the first pin hole and the second pin hole are basically aligned, the insertion end of the pin is tapered, the insertion end is inserted into the second pin hole from the bottom of the chassis, then enters the first pin hole, and then the accurate limiting between the shell body 101 and the chassis body 201 is realized.

[0080] Preferably, the outer wall surface of the threaded part 3 is provided with a second protrusion structure and / or a second recess structure, and the outer wall surface of the limiting part 4 is provided with a third protrusion structure and / or a third recess structure.

[0081] The protrusion and / or recess structure limits the threaded part 3 and the limiting part 4, and then realizes the positioning between the threaded part 3 and the shell body 101, so that the threaded part 3 is more firm in the shell body 101; similarly, the limiting part 4 is also more firm in the chassis body 201.

[0082] The application also provides an electric machine device, which comprises a stator and the shell mounting assembly.

[0083] Specifically, the shell body 101 and the chassis body 201 of the application are both cast aluminum parts, the threaded part 3, the limiting part 4 and the screw 5 all adopt 45# steel, and the surface hardness and wear resistance are improved through heat treatment.

[0084] Those skilled in the art can easily understand that the advantageous technical features of the above-mentioned modes can be freely combined and superimposed without conflict.

[0085] The above only describes the preferred embodiments of the application and should not be used to limit the application. Any modification, equivalent replacement and improvement made within the spirit and principle of the application should be included in the protection scope of the application. The above only describes the preferred embodiments of the application, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the application, a number of improvements and modifications can be made, and these improvements and modifications should be regarded as the protection scope of the application.

Claims

1. A housing mounting assembly comprising a cabinet assembly (1) and a base assembly (2), characterized in that, The shell assembly (1) comprises a shell body (101) and a threaded part (3) embedded in the shell body (101), the threaded part (3) is provided with an inner threaded hole (302), the shell body (101) is a die casting part, the wear resistance and hardness of the threaded part (3) are higher than those of the shell body (101); the base assembly (2) comprises a base body (201) and a limiting part (4) embedded in the base body (201), the base body (201) is a die casting part, the limiting part (4) has a through hole, the wear resistance and hardness of the limiting part (4) are higher than those of the base body (201); when the shell assembly (1) and the base assembly (2) are combined together, the through hole corresponds to the inner threaded hole (302), a screw (5) is inserted into the through hole and the inner threaded hole (302), and the material of the screw (5) is the same as that of the threaded part (3); The shell body (101) is provided with a first surface (1011) for pressing against the base body (201), and the threaded part (3) comprises a limiting end (305) extending out of the first surface (1011); the base body (201) is provided with a second surface (2011) for pressing against the shell body (101); The limiting part (4) is provided with a ring groove (402), and when the first surface (1011) and the second surface (2011) are pressed against each other, the limiting end (305) is inserted into the ring groove (402).

2. The housing mounting assembly of claim 1, wherein, An outer wall of the threaded part (3) is provided with a limiting rib.

3. The housing mount assembly of claim 2, wherein, The limiting rib comprises a first outer spiral rib (301), and a rotation direction of the first outer spiral rib (301) is opposite to a rotation direction of a thread of the inner threaded hole (302).

4. The housing mount assembly of claim 2, wherein, The limiting rib comprises a second outer spiral rib, and a rotation direction of the second outer spiral rib is the same as the rotation direction of the thread of the inner threaded hole (302).

5. The housing mounting assembly of claim 2, wherein, The limiting rib comprises a plurality of inclined ribs (304), and the plurality of inclined ribs (304) extend along a circumferential direction and an axial direction of an outer surface of the threaded part (3) at the same time.

6. The housing mount assembly of claim 2, wherein, The limiting rib comprises an annular reinforcing rib, and the annular reinforcing rib surrounds the threaded part (3) once. And / or, An outer wall of the threaded part (3) is provided with an axial reinforcing rib (303), and the axial reinforcing rib (303) extends along an axial direction of the threaded part (3).

7. The housing mount assembly of claim 1, wherein, An outer wall of the limiting part (4) is provided with an annular groove (401), and the annular groove (401) surrounds the limiting part (4) once.

8. The housing mount assembly of claim 1, wherein, A gasket is arranged between the first surface (1011) and the second surface (2011), the material of the gasket is the same as that of the threaded part (3), or the material of the gasket is the same as that of the limiting part (4).

9. The housing mount assembly of claim 1, wherein, One of the first surface (1011) and the second surface (2011) is provided with a first protruding structure (701), and the other is provided with a first recessed structure, and the first protruding structure is matched with the first recessed structure.

10. The housing mount assembly of any of claims 1-9, wherein, The outer wall surface of the threaded part (3) is provided with a second protruding structure and / or a second recessed structure, and the outer wall surface of the limiting part (4) is provided with a third protruding structure and / or a third recessed structure.

11. An electric machine arrangement, characterized in that The housing mounting assembly of any one of claims 1-10, wherein the housing body (101) is provided with a stator.

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