CN115473369B

CN115473369B - Weight reduction motor shell and motor assembly

Info

Publication number: CN115473369B
Application number: CN202211417368.9A
Authority: CN
Inventors: 邓超
Original assignee: Youzhu Technology Beijing Co ltd
Current assignee: Youzhu Technology Beijing Co ltd
Priority date: 2022-11-14
Filing date: 2022-11-14
Publication date: 2023-03-24
Anticipated expiration: 2042-11-14
Also published as: CN115473369A

Abstract

The application relates to the technical field of motors, and the application discloses subtract heavy motor casing and motor assembly, subtract heavy motor casing and include motor casing, a plurality of heavy troughs that subtract have been seted up to motor casing's surface, motor casing's both ends are formed with annular installed part respectively, the lateral wall evagination of installed part is equipped with the lug, and is a plurality of the lug is followed installed part circumference interval arrangement, the lug is equipped with the mounting hole. According to the weight-reducing motor shell, the motor shell is provided with the annular mounting piece and the lug arranged on the mounting piece, so that the function of the flange plate can be achieved, an additional flange plate can be omitted, the overall weight of the motor shell can be reduced, the structural design can be simplified, and the cost can be reduced; furthermore, the motor shell is provided with the weight reduction groove, so that the weight of the motor shell can be further reduced, and the weight reduction of the motor shell is promoted.

Description

Weight reduction motor shell and motor assembly

Technical Field

The invention relates to the technical field of motors, in particular to a weight-reducing motor shell and a motor assembly.

Background

The motor shell is used as a key structure of a motor module of the new energy vehicle, and needs to have excellent mechanical strength, air tightness and heat dissipation so as to ensure that the motor works safely, reliably and efficiently. The weight of the new energy vehicle body is in direct proportion to the electric quantity consumption, and the light weight becomes the development direction of the new energy vehicle for saving the electric power consumption. The weight of the motor shell in a new energy electric driving system is larger, the traditional motor shell is thick and heavy in structure, the whole weight of the shell is heavier, the manufacturing cost is higher, and the electric energy consumption of the new energy vehicle is larger.

Present motor casing, motor casing both ends need dispose ring flange assembly structure, cause motor casing whole weight big, are unfavorable for motor casing's lightweight.

Disclosure of Invention

To address one or more of the problems in the prior art, or at least to provide a useful alternative, the present invention provides a weight-reduced motor housing and motor assembly to improve the weight and strength of the motor housing.

On the one hand, the application provides a subtract heavy motor casing, including motor casing, a plurality of heavy grooves of subtracting are seted up to motor casing's surface, motor casing's both ends are formed with annular installed part respectively, the lateral wall of installed part is equipped with the lug to the evagination, and is a plurality of the lug is followed installed part circumference interval arrangement, the lug is equipped with the mounting hole.

Furthermore, the side wall of the mounting piece is also provided with a plurality of first arch ribs, the first arch ribs are provided with first through holes, and the first through holes and the mounting holes are arranged on the same central axis; the side wall of the motor shell is provided with a plurality of second arch ribs, the second arch ribs are provided with second through holes, and the second through holes and the first through holes are arranged in the same central axis; the mounting posts penetrate through the first through holes and the second through holes and are provided with slots corresponding to the mounting holes, and the inner diameters of the slots are not smaller than that of the mounting holes.

Further, the lug is integrally formed with the motor housing.

Furthermore, a plurality of straight ribs extending along the axial direction of the motor shell are arranged on the outer surface of the motor shell; the surface of motor casing is equipped with a plurality of arc muscle that extend along motor casing circumference.

Furthermore, the arc-shaped ribs and the straight ribs are arranged in a staggered mode to form a polygonal weight reduction groove, and a tie bar is arranged in the weight reduction groove.

Further, the lacing wire is arranged along the diagonal line of the polygon.

Furthermore, the cross position of the lacing wire is provided with a circular bulge.

Furthermore, a cooling liquid flow channel is arranged in the motor shell, and a liquid inlet pipe and a liquid outlet pipe which are respectively communicated with the cooling liquid flow channel are arranged on the outer surface of the motor shell; at least one of the straight ribs, the arc ribs and the lacing wires extends to the outer walls of the liquid inlet pipe and the liquid outlet pipe.

Furthermore, a reinforcing part is arranged at the connecting position of the straight rib, the arc rib or the lacing wire and the liquid inlet pipe; the straight rib, the arc rib or the tie bar are provided with a reinforcing part at the connecting position with the liquid outlet pipe.

In another aspect, the present application provides a motor assembly, which includes the above-mentioned weight-reduced motor housing, and a motor component disposed in the motor housing.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

1. according to the weight-reducing motor shell, the motor shell is provided with the annular mounting piece and the lug arranged on the mounting piece, so that the function of the flange plate can be achieved, an additional flange plate can be omitted, the overall weight of the motor shell can be reduced, the structural design can be simplified, and the cost can be reduced; furthermore, the motor shell is provided with a lightening groove, so that the weight of the motor shell can be further reduced, and the lightening is promoted.

2. As a preferred embodiment, the side wall of the mounting member is further provided with a plurality of first arch ribs, the first arch ribs are provided with first through holes, and the first through holes and the mounting holes are arranged on the same central axis; the side wall of the motor shell is provided with a plurality of second arch ribs, the second arch ribs are provided with second through holes, and the second through holes and the first through holes are arranged in the same central axis; mounting columns penetrate through the first through hole and the second through hole, the mounting columns are provided with inserting grooves corresponding to the mounting holes, and the inner diameters of the inserting grooves are not smaller than that of the mounting holes; in this embodiment, when the other structure is connected to the lug in an installing manner, the assembling screw/stud can be inserted into the slot after passing through the installing hole of the lug, so that the weight of the other structure can be promoted to be dispersed to the side wall of the motor shell close to the inner side (installing part), in other words, the structure can be used for sharing the load of the lug, the connecting strength of the other structure and the lug can be enhanced, the lug can be prevented from being easily damaged when the load is too large, and the service life of the lug can be prolonged.

3. In a preferred embodiment, the lug is integrally formed with the motor housing; the processing of motor casing can be simplified through integrated into one piece, machining efficiency is improved to the assembly of lug and installed part is saved.

4. In a preferred embodiment, the outer surface of the motor casing is provided with a plurality of straight ribs extending along the axial direction of the motor casing; the outer surface of the motor shell is provided with a plurality of arc-shaped ribs extending along the circumferential direction of the motor shell; this application sets up straight muscle and arc muscle on motor casing thickness attenuate's basis, makes its intensity satisfy the requirement when can satisfying motor casing and subtract heavy.

As a next preferred embodiment of the present embodiment, the arc-shaped ribs and the straight ribs are arranged in a staggered manner to form polygonal weight-reducing slots, and tie bars are arranged in the weight-reducing slots; on one hand, when the arc ribs and the straight ribs are arranged in a staggered manner, the strength of the motor shell can be improved; on the other hand, arc muscle and straight muscle staggered arrangement can divide into the groove that subtracts that more quantity subtracts, subtracts the intensity that the muscle then can further improve motor casing through set up the lacing wire in subtracting the inslot.

Further, the lacing wires are arranged along the diagonal line of the polygon; therefore, polygonal stability can be improved by optimizing arrangement of the lacing wires, and the motor shell strength is improved.

Furthermore, circular bulges are arranged at the crossed positions of the lacing wires; therefore, the structural stability can be further improved, and the strength of the motor shell can be improved.

5. As a preferred embodiment, a cooling liquid flow channel is arranged in the motor shell, and a liquid inlet pipe and a liquid outlet pipe which are respectively communicated with the cooling liquid flow channel are arranged on the outer surface of the motor shell; at least one of the straight ribs, the arc ribs and the lacing wires extends to the outer walls of the liquid inlet pipe and the liquid outlet pipe; the reinforcing ribs extend to the liquid inlet pipe and the liquid outlet pipe, so that the arrangement strength of the liquid inlet pipe and the liquid outlet pipe on the surface of the motor shell can be improved, and the connection reliability of the liquid inlet pipe and/or the liquid outlet pipe and related structures such as an external pipeline is guaranteed.

As a next preferred embodiment of this embodiment, a reinforcing portion is provided at a connection position of the straight rib, the arc rib, or the tie bar and the liquid inlet pipe; the connection position of the straight rib, the arc rib or the lacing wire and the liquid outlet pipe is provided with a reinforcing part; through setting up the reinforcing part, can further improve the intensity of feed liquor pipe and drain pipe, prevent its position of being connected with motor casing easy fracture etc..

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not limit the invention. In the drawings:

fig. 1 is a schematic structural view of a motor housing according to an embodiment of the present application.

Fig. 2 is an enlarged schematic view of the structure at a in fig. 1.

Fig. 3 is an enlarged schematic view of the structure at B in fig. 1.

Fig. 4 is a schematic structural diagram of a flange plate in the prior art.

Reference numerals:

10-motor housing, 11-mounting piece, 12-lug, 121- (application) mounting hole, 13-first arch rib, 14-second arch rib, 15-mounting column, 16-straight rib, 17-arc rib, 18-lightening groove, 19-tie rib, 191-circular bulge, 101-liquid inlet pipe, 102-liquid outlet pipe;

20-external flange, 21- (prior art) mounting hole.

Detailed Description

In order to more clearly explain the overall concept of the present invention, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In order that the above objects, features and advantages of the present application can be more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

In addition, in the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate orientations and positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. However, the direct connection means that the two bodies are not connected by the transition structure, but connected by the connection structure to form a whole. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In one aspect, as shown in fig. 1 to 3, the present application provides a weight-reduced motor housing, which includes a motor housing 10, wherein a plurality of weight-reduced grooves are formed on an outer surface of the motor housing 10, annular mounting pieces 11 are respectively formed at two ends of the motor housing 10, a side wall of each mounting piece 11 is provided with a plurality of lugs 12 protruding outwards, the plurality of lugs 12 are arranged at intervals along a circumferential direction of the mounting piece 11, and the lugs 12 are provided with mounting holes 121.

One of the technical concepts of the present application is that the motor housing 10 itself, the mounting 11, can be used as a flange, so that the provision of an external flange can be dispensed with. When the two flange structures at the end portions are eliminated, the overall weight of the motor housing 10 can be greatly reduced.

The mounting member 11 of the present application is provided with a lug 12 and a mounting hole 121, and when assembled with other structures, the mounting hole 121 can be penetrated with a mounting screw/bolt or the like. As shown in fig. 1, the plurality of lugs 12 are arranged along the circumferential direction, and the spacing between the plurality of lugs 12 may be equal or unequal according to actual requirements, for example, the lugs 12 are distributed more intensively in the area with larger bearing capacity and the lugs 12 are distributed more dispersedly in the area with smaller bearing capacity.

Further, as shown in fig. 1, a plurality of lightening grooves are formed in the outer side wall of the motor housing 10 between the two mounting pieces 11, the lightening grooves have a low-lying surface relative to the mounting pieces 11, the mounting pieces 11 are formed by annular structures formed at two ends, that is, the mounting pieces 11 are part of the structure of the motor housing 10, the function of the existing flange is realized by using the structure of the motor housing 10, and the motor housing can be modified on the basis of the original motor housing, so that the convenience is high. In addition, the weight of the motor shell 10 can be reduced from two aspects by eliminating the existing flange design and arranging a plurality of weight-reducing grooves, so that the motor shell 10 has obvious effect of light weight.

As a preferred embodiment of the present application, the side wall of the mounting member 11 is further provided with a plurality of first ribs 13, the first ribs are provided with first through holes, and the first through holes and the mounting holes 121 are arranged on the same central axis; the side wall of the motor shell 10 is provided with a plurality of second arch ribs 14, the second arch ribs 14 are provided with second through holes, and the second through holes and the first through holes are arranged on the same central axis; the first through hole and the second through hole are internally provided with mounting columns 15 in a penetrating mode, the mounting columns 15 are provided with inserting grooves corresponding to the mounting holes 121, and the inner diameters of the inserting grooves are not smaller than the inner diameter of the mounting holes 121.

As shown in fig. 2, the lug 12, the first rib 13, and the second rib 14 are arranged in parallel in this order, a part of the mounting column 15 is fixed to the side wall of the mounting member 11, the other part is fixed to the side wall of the motor housing 10, and the first rib 13 and the second rib 14 are enclosed above the mounting column 15, so that the installation strength of the mounting column 15 can be improved. By providing the mounting post 15 and providing the mounting post 15 with a slot, a screw/bolt passing through the mounting hole 121 can be inserted into the slot, which can improve the mounting strength. Preferably, the socket is provided with an internal thread adapted to the screw/bolt. Or, an elastic sleeve is arranged in the slot, and a screw/bolt penetrating through the mounting hole 121 can be extruded into the elastic sleeve to be in interference fit with the elastic sleeve, so that mounting handfeel is provided on one hand, and the screw/bolt can be prevented from loosening on the other hand.

As shown in fig. 4, in the conventional external flange 20 structure, the mounting hole 21 is provided through the end surface thereof, and when the external structure is mounted by the external flange 20, the weight of the external structure is substantially concentrated on the end surface of the external flange 20. In contrast, as shown in fig. 1 and fig. 2, the outward protruding lug 12 is provided, the position of the mounting hole 121 is optimized, and by the combined structure of the mounting hole 121 and the slot, a part of the weight of the mounted external structure can be concentrated on the end face where the lug 12 is located, and a part of the weight can be dispersed on the circumferential side wall of the motor housing 10, so that on one hand, the firmness and reliability of assembly can be improved, and on the other hand, the lug 12 or the mounting piece 11 (end face) can be prevented from being easily damaged when bearing a large load.

In a preferred embodiment of the present invention, the lugs 12 are integrally formed with the motor housing 10. The integrated molding can simplify the processing of the motor housing 10, improve the processing efficiency, and save the assembly of the lug 12 and the mounting piece 11.

In other embodiments, the lugs 12 may be formed as separate pieces and attached to the motor housing 10.

As a preferred embodiment of the present application, the outer surface of the motor housing 10 is provided with a plurality of straight ribs 16 extending along the axial direction of the motor housing 10; the outer surface of the motor housing 10 is provided with a plurality of arc-shaped ribs 17 extending along the circumferential direction of the motor housing 10.

For further lightweight, the design can be carried out attenuate to motor casing 10's thickness to this application, and in order to guarantee structural strength, this application has set up a plurality of strengthening ribs at motor casing 10's surface, including above-mentioned straight muscle 16 and arc muscle 17, through setting up different kinds of strengthening ribs, can further improve motor casing 10's intensity.

In some embodiments, at least a portion of the straight ribs 16 and a portion of the arc ribs 17 are disposed independently and do not intersect and connect with each other.

In other embodiments, the arc ribs 17 and the straight ribs 16 are arranged in a staggered manner and form polygonal weight-reducing grooves 18, and tie bars 19 are arranged in the weight-reducing grooves 18.

In this embodiment, preferably, when the arc ribs 17 and the straight ribs 16 have the smooth shapes as shown in fig. 1 and 3, the arc ribs 17 and the straight ribs 16 may be staggered to form a plurality of rectangular weight-reducing grooves 18, and further, when the arc ribs 17 are arranged at equal intervals and the straight ribs 16 are arranged at equal intervals, a plurality of weight-reducing grooves 18 with the same size may be formed, so that the aesthetic appearance of the motor housing 10 may be optimized to some extent. Alternatively, when the arc ribs 17 and the straight ribs 16 have irregular shapes, such as a shape in which the straight ribs 16 are connected by a plurality of broken lines, the arc ribs 17 and the straight ribs 16 may be staggered to form a plurality of polygonal weight-reducing slots 18. Further, the connecting position of the arc rib 17 and the straight rib 16 has enhanced strength, the connecting position of the tie rib 19 and the arc rib 17 and/or the straight rib 16 also has enhanced strength, and the tie rib 19 can reduce the deformation risk of the lightening groove 18 and improve the structural stability.

It can be understood that the arrangement direction of the tie bar 19 can be diversified, which is described by the positions of the two end points of the tie bar 19, the two end points of the tie bar 19 can be respectively located on the adjacent arc-shaped bar 17 and the straight bar 16, or the two end points of the tie bar 19 can be respectively located on the two opposite arc-shaped bars 17 and the tie bar 19 is not parallel to the straight bar 16, or the two end points of the tie bar 19 can be respectively located on the two opposite straight bars 16 and the tie bar 19 is not perpendicular to the straight bar 16. Further, the number of the tie bars 19 in each of the lightening slots 18 may be one or more.

In a preferred embodiment, the lacing wire 19 is arranged along a diagonal of the polygon. As shown in fig. 3, taking the rectangular lightening grooves 18 as an example, two tie bars 19 are disposed in each lightening groove 18, and occupy two diagonal lines of the rectangle respectively, so as to divide the rectangle into four triangles, thereby having higher structural stability and further improving the strength of the motor housing 10.

Further, a round bulge 191 is arranged at the crossing position of the lacing wire 19. By providing the circular protrusion 191, the stability of the triangle formed by the tie bar 19 can be further improved, thereby further improving the strength of the motor housing 10. As an implementation means, taking the rectangular weight-reducing slot 18 as an example, during processing, a circular protrusion 191 may be disposed at the center of the rectangle, and then sub-lacing wires may be disposed to the circular protrusion 191 from four end points of the rectangle, respectively, and two opposite sub-lacing wires may form a lacing wire 19 arranged along a diagonal line.

Therefore, one of the technical ideas of the present application is to ensure the strength of the motor case 10 by optimizing the type and arrangement of the ribs on the surface of the motor case 10 while achieving the purpose of reducing the weight of the motor case 10 (reducing the thickness of the motor case 10). Moreover, the arrangement of the reinforcing ribs can increase the heat dissipation area of the motor housing 10, and can also improve the heat dissipation effect.

In the embodiment with the straight ribs 16, the arc ribs 17 and the tie bars 19, further, a coolant flow channel is arranged in the motor housing 10, and a liquid inlet pipe 101 and a liquid outlet pipe 102 which are respectively communicated with the coolant flow channel are arranged on the outer surface of the motor housing 10; at least one of the straight ribs 16, the arc ribs 17 and the tie bars 19 extends to the outer walls of the liquid inlet pipe 101 and the liquid outlet pipe 102.

For satisfying the motor cooling demand, be equipped with the cooling jacket in the motor casing 10 for example, be equipped with the coolant liquid runner between the inside wall of cooling jacket and motor casing 10, be equipped with feed liquor pipe 101 and drain pipe 102 on the lateral wall of motor casing 10 to be used for the coolant liquid business turn over. To improve the connection strength between the inlet tube 101 and the outlet tube 102 and the surface of the motor housing 10, the ribs (including the straight ribs 16, the arc ribs 17, and the tie bars 19) on the surface of the motor housing 10 may extend to the side walls of the inlet tube 101 and the outlet tube 102.

As shown in fig. 1, the liquid inlet pipe 101 and/or the liquid outlet pipe 102 may protrude upward or downward obliquely relative to the outer sidewall of the motor housing 10, so as to shorten the length of the pipe structure, and meet the requirements of convenient connection with an external pipeline, reducing the occupied space of the pipeline as much as possible, and the like.

Furthermore, a reinforcing part is arranged at the connecting position of the straight rib 16, the arc rib 17 or the lacing wire 19 and the liquid inlet pipe 101; the connecting position of the straight rib 16, the arc rib 17 or the lacing wire 19 and the liquid outlet pipe 102 is provided with a reinforcing part.

By providing the reinforcement portion, the connection strength between the liquid inlet pipe 101 and the liquid outlet pipe 102 and the motor housing 10 can be further improved. The reinforcement is, for example, a triangular rib, the above-mentioned circular protrusion 191 or other structures, which are not limited in this application.

It should be noted that the circular protrusions 191 may also be disposed at the positions where any two ribs are connected, or at the positions where the ribs are connected to the protruding structures (such as the liquid inlet pipe 101 and the liquid outlet pipe 102) on the outer surface of the motor housing 10, so as to further enhance the strength of the motor housing 10.

In another aspect, the present application provides a motor assembly including the weight-reduced motor housing described in the above embodiments and examples, and a motor component disposed in the motor housing.

The application discloses motor assembly, its motor casing have advantages such as lightweight, intensity height, radiating effect are good, and motor casing subtracts the heavy factor of safety that is favorable to improving the motor operation, when being applied to new forms of energy vehicle-hour, is favorable to reducing power consumption, the energy saving.

The technical solutions protected by the present invention are not limited to the above embodiments, and it should be noted that the combination of the technical solution of any one embodiment and the technical solution of one or more other embodiments is within the protection scope of the present invention. Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A weight-reducing motor shell is characterized by comprising a motor shell, wherein a plurality of weight-reducing grooves are formed in the outer surface of the motor shell, annular mounting pieces are respectively formed at two ends of the motor shell, lugs are arranged on the side walls of the mounting pieces in an outward protruding mode and are arranged at intervals along the circumferential direction of the mounting pieces, and mounting holes are formed in the lugs;

the lug is integrally formed with the motor shell;

the outer surface of the motor shell is provided with a plurality of straight ribs extending along the axial direction of the motor shell;

the outer surface of the motor shell is provided with a plurality of arc-shaped ribs extending along the circumferential direction of the motor shell;

the arc-shaped ribs and the straight ribs are arranged in a staggered mode to form polygonal weight reduction grooves, and tie bars are arranged in the weight reduction grooves.

2. A weight-reducing motor housing as recited in claim 1,

the side wall of the mounting piece is also provided with a plurality of first arch ribs, the first arch ribs are provided with first through holes, and the first through holes and the mounting holes are arranged in the same central axis;

the side wall of the motor shell is provided with a plurality of second arch ribs, the second arch ribs are provided with second through holes, and the second through holes and the first through holes are arranged in the same central axis;

the mounting posts penetrate through the first through holes and the second through holes and are provided with slots corresponding to the mounting holes, and the inner diameters of the slots are not smaller than that of the mounting holes.

3. A weight-reduced motor housing according to claim 1,

the lacing wires are arranged along the diagonal line of the polygon.

4. A weight-reducing motor housing according to claim 3,

and circular bulges are arranged at the crossed positions of the lacing wires.

5. A weight-reduced motor housing according to claim 1,

a cooling liquid flow channel is arranged in the motor shell, and a liquid inlet pipe and a liquid outlet pipe which are respectively communicated with the cooling liquid flow channel are arranged on the outer surface of the motor shell;

at least one of the straight ribs, the arc ribs and the lacing wires extends to the outer walls of the liquid inlet pipe and the liquid outlet pipe.

6. A weight-reducing motor housing according to claim 5,

the connection position of the straight rib, the arc rib or the lacing wire and the liquid inlet pipe is provided with a reinforcing part;

the straight rib, the arc rib or the tie bar are provided with a reinforcing part at the connecting position with the liquid outlet pipe.

7. An electric machine assembly comprising a weight-reduced machine housing according to any one of claims 1 to 6, and a machine component disposed within the machine housing.