Motor reducer integrated structure

Abstract

A motor reducer integrated structure provided by the present invention comprises a shared shell and a sealing cover, the shared shell comprises a bottom plate, a first surface of the bottom plate is provided with a motor inner ring side wall and a motor outer ring side wall, a part of a motor cavity is formed between the motor inner ring side wall and the motor outer ring side wall, a cooling flow channel groove is formed in the first surface, and the sealing cover is arranged in the cooling flow channel groove. A liquid inlet and a liquid outlet which are communicated with the cooling runner groove are formed in the side wall of the shared shell, a speed reducer side wall is arranged on the second face of the bottom plate, and the inner side of the speed reducer side wall forms a part of a speed reducer cavity; the sealing cover seals the cooling runner groove; the material rigidity of the shared shell is larger than that of the sealing cover, and the heat conductivity coefficient of the sealing cover is larger than that of the shared shell. The overall connection structure is high in strength, and the material strength of the layout structure is enhanced according to stress characteristics; due to the lightweight design, the overall product quality is greatly reduced; and the cooling structure is simplified while the cooling requirement of each part structure is met by integrated regional cooling.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to an integrated structure of an electric machine and a reducer. BACKGROUND

[0002] In a conventional new energy vehicle, an electric machine and a reducer are generally independently arranged on an axle housing. In this structure, the electric machine and the reducer can be purchased from different suppliers and then assembled by an axle factory or a vehicle factory. This structure has low cost, short development cycle and is easy to implement. However, this structure has low integration degree and is not compact enough, which is not conducive to the development of new energy vehicles.

[0003] Although some manufacturers have integrated the electric machine and the reducer, the electric machine housing and the reducer housing are only connected, and there are still many deficiencies in strength, lightweight, integrated cooling. SUMMARY

[0004] Therefore, the present application aims to provide an integrated structure of an electric machine and a reducer to solve the technical problems mentioned in the background.

[0005] In one aspect, the present application provides an integrated structure of an electric machine and a reducer, comprising:

[0006] a shared housing, the shared housing comprising a bottom plate having a first side and a second side arranged opposite to each other, the first side being connected with an electric machine inner ring sidewall and an electric machine outer ring sidewall, a part of an electric machine cavity being formed between the electric machine inner ring sidewall and the electric machine outer ring sidewall, and an electric machine stator being installed in the electric machine cavity;

[0007] a reducer sidewall being connected to the second side, an inner side of the reducer sidewall forming a part of a reducer cavity, and a reducer transmission assembly being installed in the reducer cavity;

[0008] a sealing cover, a cooling flow channel groove being arranged on the first side, an opening of the cooling flow channel groove being directed to a side of the electric machine cavity and being in communication with the electric machine cavity, the sealing cover covering the cooling flow channel groove and isolating the communication between the cooling flow channel groove and the electric machine cavity, and an inlet and an outlet of the cooling flow channel groove being arranged on the shared housing;

[0009] wherein the shared housing and the sealing cover are made of different materials, the material stiffness of the shared housing being greater than that of the sealing cover, and the thermal conductivity of the sealing cover being greater than that of the shared housing.

[0010] Further, in the integrated structure of the electric machine and the reducer, the shared housing is made of cast iron or steel, and the sealing cover is made of aluminum or copper.

[0011] Further, the motor-reducer integrated structure, wherein the motor stator comprises a stator core and windings mounted on the stator core, the stator core comprises a ring-shaped yoke, one side of the yoke is attached to the sealing cover, and the other side of the yoke is connected to a plurality of teeth.

[0012] Further, the motor-reducer integrated structure, wherein the reducer transmission assembly comprises a sun gear and a planet gear mounted in the reducer cavity, and the sun gear is coaxially arranged with the motor shaft.

[0013] Further, the motor-reducer integrated structure, wherein the periphery of the shared housing is provided with an arc-shaped mounting plate, and a plurality of mounting holes are formed in the arc-shaped mounting plate.

[0014] Further, the motor-reducer integrated structure, wherein the central angle of the arc-shaped mounting plate is greater than 120°, and a reinforcing rib plate is further arranged between the arc-shaped mounting plate and the motor outer ring sidewall or the reducer sidewall.

[0015] Further, the motor-reducer integrated structure, wherein a plurality of fixing platforms are arranged in a ring array on the first surface, and a plurality of openings are formed in the sealing cover and matched with the fixing platforms, wherein a through hole is arranged at the central axis position of the fixing platform, and the through hole is used for penetrating a screw to fix the motor stator.

[0016] Further, the motor-reducer integrated structure, wherein when the sealing cover closes the cooling flow channel groove, the upper surface of the fixing platform is lower than or flush with the upper surface of the sealing cover.

[0017] Further, the motor-reducer integrated structure, wherein a first groove is arranged on the outer wall of the fixing platform, and a first O-ring is arranged in the first groove, and the first O-ring is radially sealed and matched between the inner wall of the opening and the fixing platform.

[0018] Further, the motor-reducer integrated structure, wherein the periphery of the fixing platform is provided with a bearing platform for bearing the sealing cover, the bearing platform is provided with a second groove surrounding the fixing platform, the second groove is provided with a second O-ring or structural adhesive, and the second O-ring or the structural adhesive is axially sealed and matched between the sealing cover and the bearing platform.

[0019] Further, the motor-reducer integrated structure, wherein the second surface is provided with a positioning seat corresponding to the fixing platform, and the upper surface of the positioning seat is sunken with a sunken groove communicated with the through hole.

[0020] Further, the motor-reducer integrated structure, wherein a plurality of reinforcing ribs are arranged on the surface of the second surface, and the reinforcing ribs pass through the positioning seat.

[0021] Further, the motor-reducer integrated structure, wherein the bottom plate has a mounting plane surrounding the inside and outside of the cooling flow channel groove, and a plurality of screw holes are arranged in an annular array on the mounting plane, a fixing hole is arranged on the sealing cover and aligned with the screw hole, the fixing hole is used for penetrating the screw and matched with the screw hole, so that the sealing cover seals the cooling flow channel groove.

[0022] Further, the motor-reducer integrated structure, wherein an annular groove is arranged on the mounting plane, and a structural adhesive or a sealing ring is arranged in the annular groove and axially sealed and matched between the sealing cover and the mounting plane.

[0023] Further, the motor-reducer integrated structure, wherein the cooling flow channel groove is provided with a flow blocking table connecting the inner ring side wall of the motor and the outer ring side wall of the motor, the liquid inlet is communicated with the cooling flow channel groove on the left side of the flow blocking table, and the liquid outlet is communicated with the cooling flow channel groove on the right side of the flow blocking table.

[0024] Further, the motor-reducer integrated structure, wherein the cooling flow channel groove is provided with a flow disturbing assembly, the flow disturbing assembly includes a plurality of inner flow disturbing ribs and a plurality of outer flow disturbing ribs, the plurality of inner flow disturbing ribs are arranged in an annular array in the cooling flow channel groove and extend to the inner ring side wall of the motor at one end, the outer flow disturbing ribs are arranged in an annular array in the cooling flow channel groove and extend to the outer ring side wall of the motor at one end, and the inner flow disturbing ribs and the outer flow disturbing ribs are arranged in a staggered manner.

[0025] Further, the motor-reducer integrated structure, wherein the end of the outer flow disturbing rib adjacent to the liquid inlet extends to the flow blocking table to form a first flow guiding rib, and the end of the outer flow disturbing rib adjacent to the liquid outlet extends to the flow blocking table to form a second flow guiding rib.

[0026] Compared with the prior art, the motor-reducer integrated structure has the following beneficial effects:

[0027] The overall connection structure has high strength, the material strength of the layout structure is strengthened according to the stress characteristics, the lightweight design greatly reduces the overall product quality, the integrated sub-regional cooling structure is simplified, and the cooling of each part of the structure is satisfied. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a sectional view of the motor-reducer integrated structure in the application;

[0029] Figure 2 is a perspective view of the motor-reducer integrated structure in the application from a first perspective;

[0030] Figure 3The second perspective view of the integrated structure of the motor and the speed reducer according to the present application;

[0031] Figure 4 The exploded view of the integrated structure of the motor and the speed reducer according to the present application;

[0032] Figure 5 The specific structure diagram of the sealing cover according to the present application;

[0033] Figure 6 The specific structure diagram of the bottom plate located at the side of the motor cavity according to the present application;

[0034] Figure 7 The specific structure diagram of the cooling flow channel according to the present application;

[0035] Main element symbol explanation:

[0036] 10, common housing; 101, motor cavity; 102, speed reducer cavity; 11, bottom plate; 12, motor inner ring side wall; 13, motor outer ring side wall; 14, speed reducer side wall; 15, motor stator; 151, yoke part; 152, tooth; 111, cooling flow channel; 112, liquid inlet; 113, liquid outlet; 20, sealing cover; 21, fixed table; 22, opening; 23, first O-ring; 24, through hole; 31, mounting plane; 32, screw hole; 33, fixing hole; 34, screw; 50, annular groove; 61, flow blocking table; 62, inner turbulence rib; 63, outer turbulence rib; 64, first flow guide rib; 65, second flow guide rib; 66, first flow deflector; 67, second flow deflector; 71, bearing table; 72, second O-ring; 81, positioning seat; 82, reinforcing rib; 83, speed reducer bearing chamber; 84, enclosure; 85, inclined plate; 90, arc-shaped mounting plate; 91, mounting hole; 92, reinforcing rib plate; 40, motor sub-housing; 41, motor rotor.

[0037] The following specific embodiments will further illustrate the present application in combination with the above-mentioned drawings. Specific embodiments

[0038] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The drawings show several embodiments of the present application. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0039] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. As used herein the terms "vertical", "horizontal", "left", "right" and similar terms are used for explanation purposes only.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0041] Referring to Figures 1 to 7 The motor reducer integrated structure in the first embodiment of the application comprises a shared housing 10 and a sealing cover 20. The shared housing 10 comprises a bottom plate 11 having a first face and a second face arranged oppositely. The first face is connected with a motor inner ring sidewall 12 and a motor outer ring sidewall 13. The motor inner ring sidewall 12 and the motor outer ring sidewall 13 form part of a motor cavity 101. A motor stator 15 is installed in the motor cavity 101.

[0042] The second face is connected with a reducer sidewall 14. The inner side of the reducer sidewall 14 forms part of a reducer cavity 102. A reducer transmission assembly (not shown in the figure) is installed in the reducer cavity 102.

[0043] A cooling flow channel slot 111 is arranged on the first face. The slot opening of the cooling flow channel slot 111 faces the motor cavity 101 side and is in communication with the motor cavity 101. The sealing cover 20 covers the cooling flow channel slot 111 and isolates the communication between the cooling flow channel slot 111 and the motor cavity 101. The shared housing 10 is provided with a liquid inlet 112 and a liquid outlet 113 in communication with the cooling flow channel slot 111.

[0044] The shared housing 10 and the sealing cover 20 are made of different materials. The material rigidity of the shared housing 10 is greater than that of the sealing cover 20. The thermal conductivity of the sealing cover 20 is greater than that of the shared housing 10.

[0045] The shared housing in the embodiment has high overall connection structure strength. The material strength of the layout structure is strengthened according to the stress characteristics. The lightweight design greatly reduces the overall product quality. The integrated sub-area cooling satisfies the cooling of each part of the structure and simplifies the cooling structure.

[0046] In addition, the sealing cover 20 bearing the motor stator 15 is made of high thermal conductivity material, while the common housing 10 for bearing torque is made of high strength material, ensuring structural strength while having good heat dissipation effect, so that the motor can adapt to more working scenarios. Secondly, since the cooling flow channel 111 is between the motor chamber 101 and the reducer chamber 102, the cooling flow channel 111 can cool the motor while also cooling the reducer on the other side, so that the high-temperature oil gas generated by the reducer when working can be condensed into droplets under the cooling of the cooling flow channel 111, avoiding high-pressure gas flow from the pressure relief valve to overflow.

[0047] It is worth mentioning that, since the thermal conductivity coefficient of the sealing cover 20 is greater than that of the common housing 10, and the sealing cover 20 is located on the side of the cooling flow channel 111 facing the motor chamber 101, the cooling effect of the cooling liquid in the cooling flow channel 111 on the heat source in the motor chamber 101 is better than that on the heat source in the reducer chamber 102.

[0048] Specifically, in the present embodiment, the material for preparing the common housing 10 includes but is not limited to cast iron, and can also be a material with high structural strength such as steel. The material for preparing the sealing cover 20 includes but is not limited to aluminum, and can also be a material with good thermal conductivity such as copper.

[0049] Referring to Figure 4 In the present embodiment, the motor stator 15 is of an axial air gap structure, and includes a stator core and a winding mounted on the stator core. The stator core includes an annular yoke portion 151, one side of which is in close contact with the sealing cover 20, and the other side of which is connected to a plurality of teeth 152.

[0050] In the present embodiment, the speed reduction transmission assembly includes a sun gear and a planet gear mounted in the reducer chamber. The sun gear is coaxially arranged with the motor shaft.

[0051] Referring to Figure 6The center point of the bottom plate 11 is provided with a shaft hole for the motor shaft to pass through, and the whole is an annular plate body. The cooling flow channel 111 is annular, and the annular cooling flow channel 111 is provided with a flow blocking table 61 connected to the motor inner ring side wall 12 and the motor outer ring side wall 13. The flow blocking table 61 is aligned with the center line of the bottom plate 11. The liquid inlet 112 is connected to the cooling flow channel 111 on the left side of the flow blocking table 61, and the liquid outlet 113 is connected to the cooling flow channel 111 on the right side of the flow blocking table 61. This design enables the cooling liquid to flow unidirectionally along the predetermined path after entering the cooling flow channel 111 from the liquid inlet 112, ensuring that the cooling liquid can uniformly cover the heat source in the motor cavity 101, avoiding local overheating or insufficient cooling. In addition, the unidirectional flow enables the cooling liquid to maintain a certain flow rate when flowing, thereby enhancing the convective heat transfer effect between the cooling liquid and the heat source.

[0052] Further, referring to Figure 4 and Figure 5 , the first surface has a plurality of fixing tables 21 for mounting the motor stator 15 in annular array, and the sealing cover 20 is provided with an opening 22 matched with the fixing table 21. In actual application, when the sealing cover 20 closes the cooling flow channel 111, the fixing table 21 is exposed from the opening 22 of the sealing cover 20 for connecting the motor stator 15. Specifically, the central axis of the fixing table 21 is provided with a through hole 24 for the bolt to pass through and connect the threaded hole at the bottom of the motor stator 15, thereby fixing the motor stator 15.

[0053] Further, in order to ensure that the motor stator 15 is in close contact with the sealing cover 20, the size of the sealing cover 20 is limited in this embodiment. Specifically, when the sealing cover 20 closes the cooling flow channel 111, the upper surface of the fixing table 21 is lower than or flush with the upper surface of the sealing cover 20, so as to avoid the gap between the motor stator 15 and the sealing cover 20 after the motor stator 15 is installed on the fixing table 21, thereby reducing the heat transfer effect.

[0054] Further, in order to avoid leakage of the cooling liquid from the opening 22 of the sealing cover 20, three sealing schemes are proposed in this embodiment. One is to set a first recess on the outer wall of the fixing table 21 and set a first O-ring 23 in the first recess. When the sealing cover 20 closes the cooling flow channel 111, the first O-ring 23 can be radially sealed and matched between the inner wall of the opening 22 and the fixing table 21, thereby forming an effective sealing barrier.

[0055] Secondly, the fixed table 21 is provided with a bearing table 71 for receiving the sealing cover 20, the bearing table 71 is provided with a second groove surrounding the fixed table 21, and the second groove is provided with a second O-ring 72 or structural glue. When the sealing cover 20 closes the cooling flow channel groove 111, the second O-ring 72 or structural glue can be axially sealed and matched between the sealing cover 20 and the bearing table 71. In this embodiment, the second O-ring 72 is preferably used for sealing.

[0056] Thirdly, the above two ways are combined, that is, on the basis of the radial sealing and matching between the first O-ring 23 and the inner wall of the opening 22 and the fixed table 21, the bearing table 71 is additionally increased, and the second O-ring 72 or structural glue on the bearing table 71 is axially sealed and matched with the sealing cover 20, so as to realize the double sealing in the radial direction and the axial direction of the opening 22, and the cooling liquid can be prevented from leaking to a greater extent. In this embodiment, the scheme of double sealing in the radial direction and the axial direction is preferably used.

[0057] Referring to Figure 2 , the second surface is provided with a positioning seat 81 corresponding to the fixed table 21, and the upper surface of the positioning seat 81 is sunken with a sunken groove in communication with the through hole 24. It can be understood that the bolt for fixing the motor stator 15 is inserted into the through hole 24 from the positioning seat 81, and the sunken groove is used for receiving the head of the bolt to avoid the head protruding from the surface of the second surface.

[0058] Further, the surface of the second surface is provided with a plurality of reinforcing ribs 82, and the reinforcing ribs 82 pass through the positioning seat 81. Specifically, in this embodiment, the central position of the second surface is sunken to form a reducer bearing chamber 83, a plurality of reinforcing ribs 82 are arranged in an annular array around the bearing chamber, one end of the reinforcing rib 82 extends to the inner wall of the reducer side wall 14, and the other end extends to the edge of the reducer bearing chamber 83 or the positioning seat 81. Through the design of the reinforcing rib 82, the structural strength of the bottom plate 11 can be effectively increased, so that the thickness of the bottom plate 11 can be designed to be thinner, which is beneficial to the heat exchange between the heat source in the reducer cavity 102 and the cooling flow channel groove 111.

[0059] Referring to Figure 2 , the periphery of the reducer bearing chamber 83 is provided with a fence 84, at least one notch in communication with the reducer bearing chamber 83 is formed in the fence 84, and a slope plate 85 connected with the fence 84 is arranged at the notch. It can be understood that the slope plate 85 is used for guiding part of the high-temperature oil gas to condense and fall back into the reducer bearing chamber 83. It can be understood that the number and position of the notch need to be determined according to the oil gas flow characteristics after the motor is fixed. This embodiment is only an example and is not limited.

[0060] Referring to Figures 4 to 6The bottom plate 11 has a mounting plane 31 surrounding the inner side and the outer side of the cooling flow channel groove 111, and a plurality of screw holes 32 are arranged in an annular array on the mounting plane 31. The sealing cover 20 is provided with fixing holes 33 aligned with the screw holes 32, and the fixing holes 33 are used for penetrating the screw 34 and cooperating with the screw holes 32, so that the sealing cover 20 closes the cooling flow channel groove 111.

[0061] Further, in order to avoid the leakage of the cooling liquid from the inner edge or the outer edge of the sealing cover 20, the following two sealing schemes are proposed in the embodiment. One is that an annular groove 50 is arranged on the mounting plane 31, and structural glue is arranged in the annular groove 50. When the sealing cover 20 closes the cooling flow channel groove 111, the structural glue fills and solidifies between the sealing cover 20 and the mounting plane 31, thereby forming a sealed barrier to effectively prevent the cooling liquid from leaking from the inner edge or the outer edge of the sealing cover 20.

[0062] The other is that an annular groove 50 is arranged on the mounting plane 31, and a sealing ring is arranged in the annular groove 50. When the sealing cover 20 closes the cooling flow channel groove 111, the sealing ring tightly cooperates between the sealing cover 20 and the mounting plane 31, thereby forming a sealed barrier to effectively prevent the cooling liquid from leaking from the inner edge or the outer edge of the sealing cover 20.

[0063] Further, the cooling flow channel groove 111 is provided with a turbulence component, which is used to realize turbulence and prolong the flow path of the cooling liquid in the cooling flow channel groove 111, so that the cooling liquid has a longer contact time with the heat source, and ensures that the cooling liquid can fully exchange heat with the heat source, thereby improving the heat transfer effect.

[0064] Specifically, referring to Figure 7 In the embodiment, the turbulence component includes a plurality of inner turbulence ribs 62 and a plurality of outer turbulence ribs 63. The plurality of inner turbulence ribs 62 are arranged in an annular array in the cooling flow channel groove 111, and one end extends to the motor inner ring side wall 10. The outer turbulence ribs 63 are arranged in an annular array in the cooling flow channel groove 111, and one end extends to the motor outer ring side wall 10. The inner turbulence ribs 62 and the outer turbulence ribs 63 are arranged in a staggered manner, so that the cooling flow channel groove 111 forms an S shape.

[0065] Further, one end of the outer turbulence rib 63 away from the motor outer ring side wall 10 extends to the left and right sides to form a first flow deflector 66, and the side wall of the bearing platform is provided with a second flow deflector 67 opposite to the first flow deflector 66. It can be understood that the additional first flow deflector 66 and the second flow deflector 67 can further increase the curved section of the cooling flow channel groove 111, thereby further increasing the contact time of the cooling liquid with the heat source, and further improving the heat transfer effect.

[0066] Further, the inner spoiler rib 62 is integrally connected to the fixed table 21 at one end away from the motor inner ring side wall 10. This design makes the inner spoiler rib 62 not only used for spoiler, but also as a reinforcing rib of the fixed table 21 and the bottom plate 11, so as to improve the structural strength of the fixed table 21 and the bottom plate 11.

[0067] Further, the outer spoiler rib 63 adjacent to the liquid inlet 112 has a first flow guide rib 64 formed at the end extending towards the flow blocking table 61, and the outer spoiler rib 63 adjacent to the liquid outlet 113 has a second flow guide rib 65 formed at the end extending towards the flow blocking table 61. Specifically, the first flow guide rib 64 and the second flow guide rib 65 are both arc-shaped and have a gap with the flow blocking table 61. The first flow guide rib 64 is mainly used to guide the cooling liquid entering from the liquid inlet 112 to flow along a specific path, so as to ensure that the cooling liquid can enter the cooling flow channel 111 smoothly and orderly, and lay a good foundation for the subsequent heat exchange process. Similarly, the second flow guide rib 65 is responsible for guiding the cooling liquid about to be discharged from the liquid outlet 113, so as to reduce the backflow and mixing of the cooling liquid near the liquid outlet 113, and ensure that the cooling liquid can leave the cooling flow channel 111 smoothly, thereby improving the smoothness and efficiency of the entire cooling system.

[0068] Finally, it should be noted that in the embodiment, the motor reducer integrated structure further includes a motor secondary shell 40, as shown in Figure 1 The structure of the motor secondary shell 40 is similar to that of the motor side of the bottom plate 11. The motor secondary shell 40 can be fixed with the motor outer ring side wall 13 by bolt connection, so as to form a complete motor shell. The motor rotor 41 is rotatably arranged in the motor shell. The liquid outlet 113 on the motor outer ring side wall can be connected to the liquid inlet 112 on the motor secondary shell 40 through a pipeline, so as to realize the series connection of the cooling flow channel 111. Therefore, the motor only needs one pump body structure to drive the cooling liquid to circulate in the two motor reducer integrated structures. Of course, in order to improve the cooling effect of the cooling liquid, the motor secondary shell 40 can also use a pump body structure separately.

[0069] In actual application, in order to ensure the flatness of the installation surface of the motor stator 15 and the distance from the air gap surface, the surface of the sealing cover 20 can be tamped after the sealing cover 20 is installed. During processing, in order to avoid the cutter head from colliding with the shared shell 10, the upper surface of the sealing cover 20 is allowed to be slightly higher than the upper surface of the bottom plate 11.

[0070] Referring to Figure 2The peripheral edge of the motor outer ring side wall 13 is provided with an arc-shaped mounting plate 90, the central angle of the arc-shaped mounting plate 90 is greater than 120°, and a plurality of mounting holes 91 are formed in the arc-shaped mounting plate 90. It can be understood that the mounting hole 91 is used for penetrating a bolt to integrally fix the motor reducer integrated structure on a vehicle frame or the like. In addition, in order to improve the structural strength of the arc-shaped mounting plate 90, a plurality of reinforcing rib plates 92 can be additionally arranged between the arc-shaped mounting plate 90 and the reducer side wall 14.

[0071] In summary, the motor reducer integrated structure in the above-mentioned embodiments of the present application can ensure the structural strength and has good heat dissipation effect by using high thermal conductivity material to manufacture the sealing cover 20 between the cooling flow channel groove 111 and the motor stator 15, and using high strength material to manufacture the common housing 10 for bearing torque, so that the motor can adapt to more working scenarios.

[0072] The second embodiment of the present application also provides a motor reducer integrated structure, which is different from the motor reducer integrated structure in the first embodiment in that the fixing hole 33 on the sealing cover 20 and the screw hole 32 on the mounting plane 31 are cancelled, and the sealing cover 20 is directly fixed on the mounting plane 31 by welding. Specifically, in the present embodiment, the inner edge of the sealing cover 20 is welded and fixed with the motor inner ring side wall 10 by arc welding or the like, and the outer edge of the sealing cover 20 is welded and fixed with the motor outer ring side wall 10. Compared with the screw fixing mode of the sealing cover 20 in the above-mentioned embodiment, the present embodiment eliminates the steps of processing the fixing hole 33 and the screw hole 32, thereby reducing the processing difficulty and cost.

[0073] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0074] The above-mentioned embodiments only express several implementation manners of the present application, the description is relatively specific and detailed, but it cannot be understood as a limitation on the patent scope of the present application. It should be noted that, for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. An electric machine reducer integrated structure, characterized by, The utility model relates to a common casing (10) including bottom plate (11) with opposite first surface and second surface, first surface is connected with motor inner ring side wall (12) and motor outer ring side wall (13), the part of motor cavity (101) is formed between motor inner ring side wall (12) and motor outer ring side wall (13), and motor stator (15) is installed in motor cavity (101); Second surface is connected with reducer side wall (14), and the part of reducer cavity (102) is formed to the inside of reducer side wall (14), and reduction drive assembly is installed in reducer cavity (102); Sealing cover (20), the first surface is provided with cooling flow channel groove (111), and the slot of cooling flow channel groove (111) is towards motor cavity (101) one side and is connected with motor cavity (101), and sealing cover (20) covers cooling flow channel groove (111) and separates the communication of cooling flow channel groove (111) and motor cavity (101), and the common casing (10) is equipped with the liquid inlet (112) and liquid outlet (113) of the communication of cooling flow channel groove (111); Wherein, the common casing (10) and sealing cover (20) are made of different materials, the material stiffness of the common casing (10) is greater than the material stiffness of the sealing cover (20), and the thermal conductivity of the sealing cover (20) is greater than the thermal conductivity of the common casing (10). The common casing (10) is made of cast iron or steel, and the sealing cover (20) is made of aluminum or copper.

2. The motor-reducer integrated structure according to claim 1, characterized in that, The motor stator (15) includes a stator core and a winding installed on the stator core. The stator core includes an annular yoke (151). One side of the yoke (151) is in contact with the sealing cover (20). The other side of the yoke (151) is connected to a plurality of teeth (152).

3. The motor-reducer integrated structure according to claim 1, wherein The reduction drive assembly includes a sun gear and a planet wheel installed in the reducer cavity (102). The sun gear is coaxially arranged with the motor shaft.

4. The motor-reducer integrated structure according to claim 3, wherein The periphery of the common casing (10) is provided with an arc-shaped mounting plate (90). A plurality of mounting holes (91) are formed in the arc-shaped mounting plate (90).

5. The motor-reducer integrated structure according to claim 1, wherein The central angle of the arc-shaped mounting plate (90) is greater than 120°. A reinforcing rib plate (92) is further arranged between the arc-shaped mounting plate (90) and the motor outer ring side wall (13) or the reducer side wall (14).

6. The motor-reducer integrated structure according to claim 5, wherein A plurality of fixing platforms (21) are arranged in an annular array on the first surface. A plurality of apertures (22) are formed in the sealing cover (20) to cooperate with the fixing platforms (21). A through hole (24) is formed at the central axis position of the fixing platform (21) to pass through a screw (34) to fix the motor stator (15).

7. The motor-reducer integrated structure according to claim 1, wherein When the sealing cover (20) closes the cooling flow channel groove (111), the upper surface of the fixing platform (21) is lower than or flush with the upper surface of the sealing cover (20).

8. The motor-reducer integrated structure according to claim 7, wherein ​ 9. The motor-reducer integrated structure according to claim 7, wherein The outer wall of the fixed table (21) is provided with a first groove, and a first O-shaped ring (23) is arranged in the first groove, which is radially sealed between the inner wall of the opening (22) and the fixed table (21).

10. The motor-reducer integrated structure according to claim 8 or 9, characterized in that, The periphery of the fixed table (21) is provided with a bearing table (71) for receiving the sealing cover (20), and the bearing table (71) is provided with a second groove around the fixed table (21), and a second O-shaped ring (72) or structural glue is arranged in the second groove, which is axially sealed between the sealing cover (20) and the bearing table (71).

11. The motor-reducer integrated structure according to claim 7, wherein The second surface is provided with a positioning seat (81) corresponding to the fixed table (21), and the upper surface of the positioning seat (81) is sunken with a sunken groove communicating with the through hole (24).

12. The motor-reducer integrated structure according to claim 11, wherein The surface of the second surface is provided with a plurality of reinforcing ribs (82), and the reinforcing ribs (82) are along the positioning seat (81).

13. The motor-reducer integrated structure according to claim 1, wherein The bottom plate (11) has a mounting plane (31) around the inside and outside of the cooling flow channel groove (111), and a plurality of screw holes (32) are arranged in the mounting plane (31) in a ring shape, and the sealing cover (20) is provided with a fixing hole (33) aligned with the screw hole (32), the fixing hole (33) is used for screw (34) to pass in and cooperate with the screw hole (32), so that the sealing cover (20) closes the cooling flow channel groove (111).

14. The motor-reducer integrated structure according to claim 13, wherein The mounting plane (31) is provided with an annular groove (50), and structural glue or a sealing ring is arranged in the annular groove (50), which is axially sealed between the sealing cover (20) and the mounting plane (31).

15. The motor-reducer integrated structure according to claim 1, wherein The cooling flow channel groove (111) is provided with a flow blocking table (61) connecting the inner ring side wall (12) of the motor and the outer ring side wall (13) of the motor, the inlet (112) is communicated with the cooling flow channel groove (111) on the left side of the flow blocking table (61), and the outlet (113) is communicated with the cooling flow channel groove (111) on the right side of the flow blocking table (61).

16. The motor-reducer integrated structure according to claim 15, wherein The cooling flow channel groove (111) is provided with a turbulence assembly, the turbulence assembly includes a plurality of inner turbulence ribs (62) and a plurality of outer turbulence ribs (63), a plurality of the inner turbulence ribs (62) are arranged in the cooling flow channel groove (111) in a ring shape, and one end extends to the inner ring side wall (12) of the motor, the outer turbulence ribs (63) are arranged in the cooling flow channel groove (111) in a ring shape, and one end extends to the outer ring side wall (13) of the motor, and the inner turbulence ribs (62) and the outer turbulence ribs (63) are arranged in a staggered manner.

17. The motor-reducer integrated structure according to claim 16, wherein The end of the outer turbulence rib (63) adjacent to the inlet (112) extends to the flow blocking table (61) to form a first flow guide rib (64), and the end of the outer turbulence rib (63) adjacent to the outlet (113) extends to the flow blocking table (61) to form a second flow guide rib (65).

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