CN111293819B

CN111293819B - Hub motor

Info

Publication number: CN111293819B
Application number: CN202010318591.2A
Authority: CN
Inventors: 周志刚; 杨文豪; 李争争; 孟祥明
Original assignee: Henan University of Science and Technology
Current assignee: Henan University of Science and Technology
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2022-02-25
Anticipated expiration: 2040-04-21
Also published as: CN111293819A

Abstract

The invention relates to a hub motor, which comprises a motor shaft, a stator, a shell, a rotor and a guide plate, wherein the guide plate is provided with a windward side which is used for guiding airflow in a heat dissipation channel to blow to a heating part in the shell to dissipate heat of the heating part in the shell, the guide plate is movably arranged on the shell, compared with the prior art in which the air is directly ventilated, the air deflector of the invention guides the air flow to the heating part in the casing, so that the heat of the heating part in the casing can be better dissipated, and meanwhile, the air deflector is movably arranged on the casing, when the casing rotates, the guide plate posture changes under the action of gravity, the position of the air flow blowing to the heating part in the casing is changed, the heating part in the casing is heated more uniformly, the heat dissipation effect of the heat dissipation air flow in the casing on the heating part in the casing is uniform, and the technical problem that the heat dissipation effect is poor due to the fact that the uniformity of the heat dissipation air flow in the existing air-cooled hub motor is poor is solved.

Description

Hub motor

Technical Field

The invention relates to a hub motor.

Background

The hub motor on the electric automobile has the advantages of high power density, strong sealing performance, small space and the like, so that the temperature rise inside the hub motor is high, and the heat dissipation is difficult. The over-high temperature in the hub motor can cause the consequences of damaged coil insulativity, irreversible demagnetization of the permanent magnet and the like, and further the service life of the hub motor is reduced, so the temperature in the hub motor must be controlled within the range allowed by the hub motor.

Chinese patent with grant bulletin No. CN204132322U and grant bulletin date 2018.07.03 discloses an electric automobile hub motor air-cooling heat dissipation structure, hub motor end covers are arranged on the left and right sides of a hub motor, a bearing is arranged between a motor shaft and the left hub motor end cover, the motor shaft is provided with an air duct with inner and outer two layers of concentric circles, the inner air duct is an air inlet channel, the outer air duct is an air outlet channel, one ends of the air inlet channel and the air outlet channel are communicated with an inner cavity of the hub motor, the other ends of the air inlet channel and the air outlet channel are respectively connected with an air inlet and an air outlet, and air flows smoothly inside the sealed hub motor to take away heat. When the air current flows in the wheel hub, the air current does not directly blow to heating parts in the shell, and because the air inlet and the air outlet are limited in number, the uniformity of the air current is poor, and the technical problem of poor heat dissipation effect exists.

Disclosure of Invention

The invention aims to provide a hub motor, which is used for solving the technical problem of poor heat dissipation effect caused by poor uniformity of heat dissipation airflow in the existing hub motor adopting air cooling.

The hub motor adopts the following technical scheme:

in-wheel motor includes:

a motor shaft;

the stator is fixed on the motor shaft;

the shell is rotatably assembled on the motor shaft and internally provided with a heat dissipation channel;

the rotor is fixed in the shell;

the in-wheel motor still includes:

the guide plate is movably arranged on the shell so as to change the posture under the action of self gravity when the shell rotates, and the guide plate changes the position of the airflow blown to the heating components in the shell through the change of the posture.

The invention has the beneficial effects that: compared with the prior art in which a direct ventilation mode is adopted, the guide plate guides airflow to the heating part in the casing, so that the heating part in the casing can be better radiated, and the guide plate is movably arranged on the casing.

Furthermore, the guide plate is hinged in the shell, and a limiting structure for limiting the swing angle of the guide plate is arranged in the shell. The air flow can be better restrained through the limiting structure.

Further, the hinge axis of the baffle is coplanar with the motor shaft axis. The guide plate swings around the hinge axis when swinging, and the guide plate swings back and forth on two sides of the plane where the two axes are located when swinging, so that the uniformity of air flow in the shell is further improved.

Furthermore, a fixed rod is fixed on the casing, one end of the fixed rod is suspended in the casing, and the guide plate is hinged to one end of the suspended fixed rod. The fixing rod is simple in structure and convenient to install.

Furthermore, the end portion of the fixing rod is provided with a mounting hole, a guide plate hinged shaft is arranged on the guide plate, the guide plate hinged shaft is inserted into the mounting hole, one of the hole wall of the mounting hole and the guide plate hinged shaft is provided with a sliding block, the other one of the hole wall of the mounting hole and the guide plate hinged shaft is provided with an arc-shaped groove in sliding fit with the sliding block along the circumferential direction of the guide plate hinged shaft, the arc-shaped groove extends along the circumferential direction of the guide plate hinged shaft, the arc-shaped groove and the sliding block form the limiting structure, and the two groove wall surfaces of the arc-shaped groove opposite to the circumferential direction of the guide plate hinged shaft are used for being matched with the sliding block in a blocking manner to limit the swing angle of the guide plate. The arc-shaped groove and the sliding block are simple and stable in structure, and the limiting effect on the guide plate is good.

Furthermore, the guide plate is an inwards concave arc-shaped plate, and the notch on the guide plate faces to a heating component in the shell. The arc-shaped guide plate can gather wind and guide more wind to the heating part in the shell.

Furthermore, the concave arc-shaped plate is a tile-shaped plate. The tile-shaped plate has simple structure and is convenient to process.

Furthermore, a casing gas flow passage for introducing gas into the casing is arranged in the casing wall of the casing, a motor shaft gas flow passage for discharging gas in the casing is arranged on the motor shaft, the casing gas flow passage is communicated with the heat dissipation channel through a gas supply port, the part of the casing extending along the axial direction of the motor shaft is an outer peripheral part, the parts at two ends of the outer peripheral part are casing end parts, the gas supply port is arranged on the outer peripheral part, and the flow guide plate is arranged on the casing end part. The air supply ports are arranged on the periphery of the shell, so that the number of air inlets can be increased, the air inflow is increased, positive pressure is formed in the shell, and the heat dissipation efficiency is improved.

Further, a shell liquid flow channel for cooling liquid to flow through and a shell gas flow channel for cold air to flow through are arranged on the shell, and a motor shaft liquid flow channel for cooling liquid to flow through and a motor shaft gas flow channel for cold air to flow through are arranged on the motor shaft;

the shell liquid flow passage is provided with a motor shaft flow passage communication port communicated with the motor shaft liquid flow passage and a liquid flow passage external communication port communicated with an external liquid pipeline, the liquid flow passage external communication port is annular, and the motor shaft flow passage communication port is annular or circular;

the shell comprises two shaft end parts which are respectively positioned at two sides of the accommodating cavity in the axial direction of the motor shaft and an outer peripheral part which is connected with the two shaft end parts, and a flow passage communication port of the motor shaft and an external connection communication port of the liquid flow passage are respectively arranged on the two shaft end parts;

the motor shaft flow passage communicating port, the liquid flow passage external communicating port and the motor shaft are coaxial;

the shell is in rotary sealing fit with the motor shaft at the connecting port of the motor shaft flow passage;

one end of the motor shaft gas flow passage is communicated with the heat dissipation passage, and the other end of the motor shaft gas flow passage is communicated with the external gas pipeline;

the shell gas channel is provided with a gas channel external connecting port which is used for being communicated with an external gas pipeline, the gas channel external connecting port and the liquid channel external connecting port are arranged on the same axial end part, and the gas channel external connecting port is annular and coaxial with the liquid channel external connecting port;

outside rotary joint, include the fixed part fixed with the motor shaft and with the fixed rotation portion of casing shaft end part, rotation portion and fixed part rotary seal cooperation, be equipped with in the outside rotary joint with the liquid adapter passageway of the external intercommunication mouth intercommunication of liquid runner and with the gaseous adapter passageway of the external intercommunication mouth intercommunication of gas runner, be equipped with on the fixed part and be used for communicateing the gaseous connector of gaseous adapter passageway and external gas pipeline and be used for communicateing the liquid connector of liquid adapter passageway and external liquid pipeline, the casing passes through outside rotary joint and external liquid pipeline and external gas pipeline rotary seal cooperation.

Has the advantages that: the hub motor is provided with a shell liquid flow passage and a motor shaft liquid flow passage, cooling liquid flows in the shell liquid flow passage and the motor shaft liquid flow passage to cool the shell, the hub motor is also provided with a shell gas flow passage and a motor shaft gas flow passage, the shell gas flow passage and the motor shaft gas flow passage are respectively communicated with a heat dissipation channel of the shell, and cold air can flow in the shell gas flow passage, the heat dissipation channel and the motor shaft gas flow passage to cool heating parts in the shell; this wheel hub motor realizes its heat dissipation through liquid cooling and forced air cooling dual mode, can improve its radiating effect and radiating efficiency.

Drawings

Fig. 1 is a use state diagram of an embodiment 1 of the hub motor provided by the invention in fig. 1;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

FIG. 4 is a cross-sectional view C-C of FIG. 1;

fig. 5 is a schematic layout view of a third casing liquid flow path segment, a fourth casing liquid flow path segment, a peripheral casing gas flow path segment and a peripheral casing gas flow path connection segment on the outer peripheral portion of the casing in embodiment 1 of the hub motor provided in the present invention;

fig. 6 is a schematic structural view of an external rotary joint in embodiment 1 of the hub motor provided in the present invention;

fig. 7 is a schematic view of an installation state of a baffle plate in the hub motor in embodiment 1 of the hub motor provided by the invention;

FIG. 8 is a top view of FIG. 7;

FIG. 9 is a cross-sectional view of the baffle of FIG. 7;

FIG. 10 is a cross-sectional view of the hinge shaft and retaining bar of the baffle of FIG. 9;

in the figure: 1-motor shaft, 2-stator, 3-first housing end, 4-second housing end, 5-outer periphery, 6-first bearing, 7-second bearing, 8-first rotary seal, 9-second rotary seal, 10-shaft, 11-shaft sleeve, 12-first housing end axial extension, 13-second housing end axial extension, 14-first housing annular wall, 15-second housing annular wall, 16-third housing annular wall, 17-inner rotary joint, 18-motor shaft connection, 19-housing connection, 20-fourth housing annular wall, 21-connection, 22-first rotary part, 23-second rotary part, 24-first liquid adapter passage, 25-second liquid adapter passage, 26-a gas adapter channel, 27-a first liquid connection port, 28-a second liquid connection port, 29-a gas connection port, 30-a gas inlet pipe, 31-a gas outlet pipe, 32-a liquid inlet pipe, 33-a first liquid outlet pipe, 34-a second liquid outlet pipe, 35-a first housing liquid flow channel section, 36-a second housing liquid flow channel section, 37-a third housing liquid flow channel section, 38-a fourth housing liquid flow channel section, 39-an axial end housing gas flow channel section, 40-a first peripheral housing gas flow channel section, 41-a containment cavity, 42-a first housing end radial extension, 43-a second housing end radial extension, 44-an axial extension flow channel section, 46-a first motor shaft liquid flow channel section, 47-a second motor shaft liquid flow channel section, 48-third motor shaft liquid flow passage section, 49-external rotary joint, 50-first housing axial liquid flow passage section, 51-housing axial gas flow passage section, 52-second housing axial liquid flow passage section, 53-third rotary section, 54-fourth rotary section, 55-annular disc, 56-first joint annular wall, 57-second joint annular wall, 58-third joint annular wall, 59-fourth joint annular wall, 60-second peripheral housing gas flow passage section, 61-communicating pipe section, 62-first motor shaft gas flow passage section, 63-second motor shaft gas flow passage section, 64-third motor shaft gas flow passage section, 65-gas supply port, 66-baffle, 67-windward side, 68-baffle articulated shaft; 69-fixing the rod; 70-an arc-shaped groove; 71-sliding block.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are described in further detail below with reference to examples.

Embodiment 1 of the in-wheel motor of the present invention:

the in-wheel motor includes the motor shaft and with motor shaft normal running fit's motor casing, the suit is fixed with stator 2 on the motor shaft, stator 2 is in the motor casing, still is fixed with the rotor in the motor casing.

As shown in fig. 1 to 3, the casing includes an outer peripheral portion 5 extending in a radial direction of the motor shaft and two casing end portions extending in a circumferential direction of the motor shaft, the two casing end portions being a first casing end portion and a second casing end portion, respectively, and being spaced apart from the outer peripheral portion in an axial direction of the motor shaft to define a housing chamber 41 for housing the stator 2 and the rotor. In this embodiment, the first case end is disposed at the left end, and the second case end is disposed at the right end.

The casing includes first shell tip 3, second shell tip 4 and peripheral part 5, first shell tip 3 includes along the radial first shell tip radial extension 42 of extension of motor shaft 1 and the first shell tip axial extension 12 of extending towards the right side from first shell tip radial extension 42, first shell tip radial extension 42 is whole to be the disc, first shell tip axial extension 12 has the perforation that supplies motor shaft 1 to pass, first shell tip 3 rotates through first bearing 6 and supports on motor shaft 1 to realize its sealed with motor shaft 1 through first rotary seal 8.

The second shell end 4 includes a second shell end radial extending portion 43 extending in the radial direction of the motor shaft 1 and a second shell end axial extending portion 13 extending rightward from the second shell end radial extending portion 43, the second shell end radial extending portion 43 is overall disc-shaped, the second shell end axial extending portion 13 has a through hole for the motor shaft 1 to pass through, and the second shell end 4 is rotatably supported on the motor shaft 1 through the second bearing 7 and is sealed with the motor shaft 1 through the second rotary seal ring 9.

The outer peripheral portion 5 connects the first shell end radial extension 42 and the second shell end radial extension 43, and the outer peripheral portion 5, the first shell end radial extension 42 and the second shell end radial extension 43 together enclose the accommodation chamber 41.

As shown in fig. 1-3, a plurality of first casing liquid flow passage sections 35 extending in the radial direction are provided on the first casing end radial extension portion 42, the plurality of first casing liquid flow passage sections 35 are radially arranged on the first casing end radial extension portion 42, a perforated portion of the first casing end axial extension portion 12 through which the motor shaft 1 passes forms an axial extension portion flow passage section 44, the cross section of the axial extension portion flow passage section 44 is circular and coaxial with the motor shaft 1, after the casing is sleeved on the motor shaft 1, only a part of the axial extension portion flow passage section 44 having an annular cross section is provided for the cooling liquid to flow through, and the axial extension portion flow passage section 44 is communicated with each of the first casing liquid flow passage sections 35.

As shown in fig. 1 and 3, the motor shaft 1 includes a shaft body 10 and a shaft sleeve 11 fixed on the outer side of the shaft body 10 in a sleeving manner, a plurality of axially extending grooves are formed on the inner wall of the shaft sleeve 11, one end of each groove penetrates through the end of the shaft sleeve 11 to communicate with an axially extending flow passage section 44, and after the shaft sleeve 11 is sleeved on the shaft body 10, the grooves form a first motor shaft liquid flow passage section 46. A second motor shaft liquid flow passage section 47 is arranged at the right end of the shaft body 10, the second motor shaft liquid flow passage section 47 extends along the axial direction of the shaft body 10, one end of the second motor shaft liquid flow passage section 47 is used for being connected with an external liquid inlet pipe 32, the other end of the second motor shaft liquid flow passage section 47 extends to the position of the first motor shaft liquid flow passage section 46, the second motor shaft liquid flow passage section is communicated with each first motor shaft liquid flow passage section 46 through a plurality of third motor shaft liquid flow passage sections 48 which radially penetrate through the shaft body 10 and are arranged on the shaft body 10, and the plurality of third motor shaft liquid flow passage sections 48 are arranged in a crossed mode; the first motor shaft liquid flow path section 46, the second motor shaft liquid flow path section 47 and the third motor shaft liquid flow path section 48 together form a motor shaft liquid flow path on the motor shaft 1.

As shown in fig. 1 and 3, the left end of the first motor shaft liquid flow passage section 46 is communicated with the axially extending part flow passage section 44, the cooling liquid in the liquid inlet pipe 32 can sequentially pass through the second motor shaft liquid flow passage section 47, the third motor shaft liquid flow passage section 48, the first motor shaft liquid flow passage section 46 and the axially extending part flow passage section 44 to enter each first housing liquid flow passage section 35, in order to prevent the cooling liquid from entering the accommodating cavity 41 in the housing, the first housing end axially extending part 12 is connected with the shaft sleeve 11 of the motor shaft 1 through the internal rotary joint 17 in a rotary and sealed manner, the internal rotary joint 17 includes a motor shaft connecting part 18 fixed with the shaft sleeve 11 and a housing connecting part 19 fixed with the first housing end axially extending part 12, the housing connecting part 19 and the motor shaft connecting part 18 are both of a cylindrical structure, the housing connecting part 19 is in a nested fit with the motor shaft connecting part 18, and a bearing (not shown in the figures) and a sealing ring (not shown in the figures) are arranged at the nested fit part, the shell connecting part 19 and the motor shaft connecting part 18 can be in rotary sealing fit, and the first shell end axial extension part 12 and the shaft sleeve 11 are in rotary sealing fit; the interior cavities of the housing connection 19 and the motor shaft connection 18 form a connection passage that communicates the axially extending flow passage section 44 with the first motor shaft liquid flow passage section 46.

As shown in fig. 1 and 4, the second casing end axial extension portion 13 includes a first casing annular wall 14, a second casing annular wall 15, a third casing annular wall 16 and a fourth casing annular wall 20 which are coaxially arranged from outside to inside, the four casing annular walls are all coaxial with the motor shaft 1, and a second bearing 7 and a second rotary sealing ring 9 are arranged between the fourth casing annular wall 20 and the shaft sleeve 11 of the motor shaft 1, so that the second casing end axial extension portion 13 is rotatably matched and sealed with the motor shaft 1; a first casing axial liquid flow passage section 50 is formed between the first casing annular wall 14 and the second casing annular wall 15, a casing axial gas flow passage section 51 is formed between the second casing annular wall 15 and the third casing annular wall 16, a second casing axial liquid flow passage section 52 is formed between the third casing annular wall 16 and the fourth casing annular wall 20, and the first casing axial liquid flow passage section 50, the second casing axial liquid flow passage section 52 and the casing axial gas flow passage section 51 are all annular and coaxial.

As shown in fig. 1 and 6, an external rotary joint 49 is fixedly mounted on the motor shaft 1 at a position corresponding to the right end of the second housing end axial extension 13, the external rotary joint 49 includes an annular disc 55 extending along the radial direction of the motor shaft 1 and four joint annular walls fixed on the left side surface of the annular disc 55 and extending along the axial direction of the motor shaft 1, the annular disc 55 is fixed on the outer peripheral surface of the shaft sleeve 11 of the motor shaft 1, the four joint annular walls are a first joint annular wall 56, a second joint annular wall 57, a third joint annular wall 58 and a fourth joint annular wall 59 from outside to inside, and the four joint annular walls are all coaxial with the motor shaft 1; the external rotary joint 49 further includes a first rotating portion 22, a second rotating portion 23, a third rotating portion 53 and a fourth rotating portion 54, and the first rotating portion 22, the second rotating portion 23, the third rotating portion 53 and the fourth rotating portion 54 are all cylindrical structures and have diameters which are sequentially reduced; the annular disc 55, the first joint annular wall 56, the second joint annular wall 57, the third joint annular wall 58 and the fourth joint annular wall 59 together constitute a fixed part of the external rotary joint 49.

As shown in fig. 1 and 6, the first rotating part 22 is nested and engaged with the first joint annular wall 56, and a bearing (not shown) and a sealing ring (not shown) are provided at the nested position, so that the first rotating part 22 is in rotating and sealing engagement with the first joint annular wall 56; the second rotating part 23 is in nested fit with the second joint annular wall 57, and a bearing (not shown in the figure) and a sealing ring (not shown in the figure) are arranged at the nested position, so that the second rotating part 23 is in rotating sealed fit with the second joint annular wall 57; the third rotating part 53 is in nested fit with the third joint annular wall 58, and a bearing (not shown in the figure) and a sealing ring (not shown in the figure) are arranged at the nested position, so that the third rotating part 53 is in rotating sealed fit with the third joint annular wall 58; the fourth rotating part 54 is in nested fit with the fourth joint annular wall 59, and a bearing (not shown) and a sealing ring (not shown) are arranged at the nested position of the fourth rotating part 54, so that the fourth rotating part 54 is in rotating sealed fit with the fourth joint annular wall 59; the first turning portion 22, the second turning portion 23, the third turning portion 53, and the fourth turning portion 54 constitute turning portions of the outer rotary joint 49.

As shown in fig. 1 and 6, the external swivel joint 49 has a first fluid joint passage 24, a second fluid joint passage 25, and a gas joint passage 26 therein, the first fluid joint passage 24 is defined by the first rotating portion 22, the first joint annular wall 56, the second rotating portion 23, and the second joint annular wall 57, the gas joint passage 26 is defined by the second rotating portion 23, the second joint annular wall 57, the third rotating portion 53, and the third joint annular wall 58, and the second fluid joint passage 25 is defined by the third rotating portion 53, the third joint annular wall 58, the fourth rotating portion 54, and the fourth joint annular wall 59; the first and second

fluid adapter passages

24, 25 form a fluid adapter passage in the outer swivel 49.

As shown in fig. 1, the left end of the external rotary joint 49 is connected with the right end of the second shell end axial extension 13, specifically: the first rotating part 22 is fixedly connected with the first casing annular wall 14, the second rotating part 23 is fixedly connected with the second casing annular wall 15, the third rotating part 53 is fixedly connected with the third casing annular wall 16, and the fourth rotating part 54 is fixedly connected with the fourth casing annular wall 20; a first housing axial liquid flow passage section 50 in the second housing end axial extension 13 communicates with the first liquid adapter passage 24, a housing axial gas flow passage section 51 communicates with the gas adapter passage 26, and a second housing axial liquid flow passage section 52 communicates with the second liquid adapter passage 25.

As shown in fig. 1 and 6, a first liquid connection port 27 axially penetrating the annular disk 55 is provided on the annular disk 55 of the external rotary joint 49 corresponding to the first liquid joint passage 24, the first liquid connection port 27 is used for connecting with the external first outlet pipe 33, a second liquid connection port 28 axially penetrating the annular disk 55 is provided on the annular disk 55 corresponding to the second liquid joint passage 25, the second liquid connection port 28 is used for connecting with the external second outlet pipe 34, a gas connection port 29 axially penetrating the annular disk 55 is provided on the annular disk 55 corresponding to the gas joint passage 26, the gas connection port 29 is used for connecting with the external gas inlet pipe 30, and the first liquid connection port 27 and the second liquid connection port 28 together constitute a liquid connection port on the fixing portion.

In this embodiment, the housing is rotatably and sealingly engaged with the first outlet pipe 33, the second outlet pipe 34 and the inlet pipe 30 via an external rotary joint 49.

As shown in fig. 1 and 2, a plurality of second casing liquid flow passage sections 36 are disposed on the second casing end radial extension portion 43, the number of the second casing liquid flow passage sections 36 is the same as that of the first casing liquid flow passage sections 35, and the second casing liquid flow passage sections 36 are disposed on the second casing end radial extension portion 43 in a radial manner, and each second casing liquid flow passage section 36 is communicated with the first casing axial liquid flow passage section 50 and the second casing axial liquid flow passage section 52.

As shown in fig. 5, a plurality of third casing liquid flow channel sections 37 are provided on the peripheral portion 5, the number of the third casing liquid flow channel sections 37 is the same as that of the first casing liquid flow channel sections 35 and corresponds to one another, one end of the third casing liquid flow channel section 37 communicates with the first casing liquid flow channel section 35, and the other end communicates with the second casing liquid flow channel section 36, so that the first casing liquid flow channel section 35 communicates with the second casing liquid flow channel section 36; a plurality of fourth casing liquid flow channel sections 38 are further provided on the peripheral portion 5, the number of the fourth casing liquid flow channel sections 38 is one less than that of the third casing liquid flow channel sections 37, and each fourth casing liquid flow channel section 38 is provided between adjacent third casing liquid flow channel sections 37, so that the adjacent third casing liquid flow channel sections 37 are connected and communicated end to end in sequence.

As shown in fig. 1 and 2, a shaft end casing gas flow passage section 39 is provided in the second casing liquid flow passage section 36, and the shaft end casing gas flow passage section 39 communicates with the casing axial gas flow passage section 51; a first peripheral casing gas flow passage section 40 is arranged in the third casing liquid flow passage section 37, the first peripheral casing gas flow passage section 40 is communicated with the shaft end casing gas flow passage section 39, and each first peripheral casing gas flow passage section 40 is also provided with two communicating pipe sections 61 which extend towards the accommodating cavity 41 and enable the first peripheral casing gas flow passage section 40 to be communicated with the accommodating cavity 41; a second peripheral casing gas flow path section 60 is provided in the fourth casing liquid flow path section 38, the second peripheral casing gas flow path section 60 communicating with the adjacent first peripheral casing gas flow path sections 40 such that each first peripheral casing gas flow path section 40 is connected end to end in sequence; the first peripheral casing gas flow path section 40 constitutes a peripheral casing gas flow path section and the second peripheral casing gas flow path section 60 constitutes a peripheral casing gas flow path connection section.

When cooling liquid is used for cooling the hub motor, the cooling liquid enters the hub motor from the liquid inlet pipe 32, and enters the first liquid outlet pipe 33 (or the second liquid outlet pipe 34) after passing through the second motor shaft liquid flow passage section 47, the third motor shaft liquid flow passage section 48, the first motor shaft liquid flow passage section 46, the axial extension part flow passage section 44, the first housing liquid flow passage section 35, the third housing liquid flow passage section 37, the second housing liquid flow passage section 36, the first housing axial liquid flow passage section 50 (or the second housing axial liquid flow passage section 52) and the first liquid adapter passage 24 (or the second liquid adapter passage 25), and meanwhile the cooling liquid flows in the fourth housing liquid flow passage section 38, flows according to the above path, and cools the housing and the motor shaft 1; the axial extension part flow channel section 44, the first case liquid flow channel section 35, the third case liquid flow channel section 37, the second case liquid flow channel section 36, the first case axial liquid flow channel section 50, the second case axial liquid flow channel section 52 and the fourth case liquid flow channel section 38 form a case liquid flow channel together, a motor shaft flow channel communication port is formed by a port where the axial extension part flow channel section 44 is connected with the first motor shaft liquid flow channel section 46, the liquid inlet pipe 32, the first liquid outlet pipe 33 and the second liquid outlet pipe 34 are external liquid pipelines, and external communication ports of the liquid flow channels of the case liquid flow channel are formed by ports at the right ends of the first case axial liquid flow channel section 50 and the second case axial liquid flow channel section 52.

As shown in fig. 1 and 3, a plurality of first motor shaft gas flow passage sections 62 radially penetrating through the shaft body 10 are arranged on the shaft body 10 in the shaft section of the motor shaft 1 corresponding to the accommodating cavity 41, the first motor shaft gas flow passage sections 62 are arranged in a crossed manner, corresponding through holes are arranged at ports of the shaft sleeve 11 corresponding to the first motor shaft gas flow passage sections 62, connecting pipes 21 are arranged at the through holes, and the connecting pipes 21 extend into the first motor shaft gas flow passage sections 62, so that the accommodating cavity 41 is communicated with the first motor shaft gas flow passage sections 62; a second motor shaft gas flow passage section 63 extending along the axial direction of the shaft body 10 is further arranged on the shaft body 10, the left end of the second motor shaft gas flow passage section 63 is communicated with each first motor shaft gas flow passage section 62, the right end of the second motor shaft gas flow passage section 63 is stopped at the left side of a third motor shaft liquid flow passage section 48 on the shaft body 10, a third motor shaft gas flow passage section 64 is further arranged on the shaft body 10, one end of the third motor shaft gas flow passage section 64 is communicated with the second motor shaft gas flow passage section 63, the other end of the third motor shaft gas flow passage section is communicated with the outside at the side surface of the shaft body 10, the third motor shaft gas flow passage section 64 is staggered with the third motor shaft liquid flow passage section 48 when passing through the third motor shaft liquid flow passage section 48, and an outlet of the third motor shaft gas flow passage section 64 communicated with the outside is used for being connected with an outside outlet pipe 31.

As shown in fig. 7 to 10, in the present embodiment, the air flow passage in the housing chamber 41 constitutes a heat dissipation passage in the casing, the end of the connection pipe section 61 is opened to form an air supply port 65 for supplying air into the heat dissipation passage, and the casing air flow passage communicates with the heat dissipation passage through the air supply port 65.

In order to uniformly enter the air flow in the heat dissipation channel, a guide plate 66 is arranged in the heat dissipation channel, the guide plate 66 is provided with a windward side 67 and a leeward side, and the windward side 67 is used for guiding the air flow in the heat dissipation channel to blow towards the stator 2 to dissipate heat of the stator 2. Guide plate 66 articulates in the casing in this embodiment, and the guide plate 66 afterbody is equipped with guide plate articulated shaft 68, and the casing internal fixation has dead lever 69, and dead lever 69 one end is the overhang end of overhang in the casing, and the articulated axis of

guide plate

66 and 1 axis of motor shaft coplane, the articulated axis of

guide plate

66 and 1 axis of motor shaft have the settlement contained angle, and on keeping away from stator 2's direction along 1 axis of motor shaft, guide plate articulated shaft 68 kept away from the motor shaft axis gradually. The overhanging end of the fixing rod 69 is provided with a mounting hole, the guide plate hinge shaft 68 is inserted into the mounting hole, an arc-shaped groove 70 is arranged on the hole wall of the mounting hole, a sliding block 71 is arranged on the guide plate hinge shaft 68, the arc-shaped groove 70 extends along the axial direction of the guide plate hinge shaft 68, and two groove wall surfaces of the arc-shaped groove 70 opposite to the circumferential direction of the guide plate hinge shaft 68 are used for being matched with the sliding block 71 in a blocking manner to limit the swing angle of the guide plate 66. The arc-shaped groove 70 and the sliding block 71 in this embodiment form a limiting structure for limiting the swing angle of the deflector 66. In this embodiment, the arc wall sets up two, and the slider that corresponds sets up two, slider and arc wall one-to-one.

In this embodiment, the guide plate 66 is disposed in the casing through the guide plate hinge shaft 68 in a swinging manner, and when the casing rotates, the guide plate 66 changes the posture under the action of its own gravity, and the guide plate 66 changes the position where the air flow blows toward the stator 2 through the change of the posture. The deflector hinge shaft 68 is welded to the deflector 66. To avoid the influence of air flow speed, centripetal force during rotation of the housing, etc., the weight of the deflector 66 should be weighted appropriately to ensure that the deflector 66 can change attitude under its own weight.

The guide plate 66 is an arc-shaped plate, the notch of the arc-shaped plate faces the stator 2, the arc-shaped plate is tile-shaped in the embodiment, and a groove which is axially communicated along a guide plate hinge shaft 68 is formed in the middle of the tile-shaped arc-shaped plate.

When the hub motor is cooled by cold air, the cold air enters the hub motor from the air inlet pipe 30, and passes through the air adapter channel 26, the housing axial air flow passage section 51, the shaft end housing air flow passage section 39, the first peripheral housing air flow passage section 40, the communicating pipe section 61, the accommodating cavity 41, the connecting pipe 21, the first motor shaft air flow passage section 62, the second motor shaft air flow passage section 63 and the third motor shaft air flow passage section 64, and then enters the air outlet pipe 31, meanwhile, the cold air flows in the second peripheral housing air flow passage section 60, and the cold air flows through the paths and cools the stator 22. After entering the heat dissipation channel through the air supply port 65, the cold air is guided to blow towards the stator 2 under the action of the guide plate 66, so that the cooling effect on the stator 2 is improved.

The connecting pipe 21, the first motor shaft gas flow passage section 62, the second motor shaft gas flow passage section 63 and the third motor shaft gas flow passage section 64 form a motor shaft gas flow passage, the communicating pipe section 61, the first peripheral casing gas flow passage section 40, the second peripheral casing gas flow passage section 60, the shaft end casing gas flow passage section 39 and the casing axial gas flow passage section 51 form a casing gas flow passage together, the air inlet pipe 30 and the air outlet pipe 31 are external gas pipes, and the right end port of the casing axial gas flow passage section 51 forms an external communicating port of the gas flow passage of the casing gas flow passage.

In the embodiment 2 of the hub motor of the present invention, the hub motor in this embodiment is different from the hub motor in the embodiment 1 only in that: the guide plate is directly hinged on the inner wall of the shell. In other embodiments, the baffle may also be hinged to the outer periphery of the housing.

In the embodiment 3 of the hub motor of the present invention, the hub motor in this embodiment is different from the hub motor in the embodiment 1 only in that: the guide plate is a V-shaped plate, a notch of a V-shaped groove formed by the V-shaped plate faces the stator, and the V-shaped groove extends along the extension direction of the hinge axis of the guide plate. In other embodiments, the baffle may be a flat plate.

In an embodiment 4 of the hub motor of the present invention, the hub motor in this embodiment is different from the hub motor in embodiment 1 only in that: in this embodiment, the hinge axis of the guide plate is parallel to the axis of the motor shaft and spaced. In other embodiments, the hinge axis of the baffle and the motor shaft axis may not be coplanar.

In an embodiment 5 of the hub motor of the present invention, the hub motor in this embodiment is different from the hub motor in embodiment 1 only in that: in this embodiment, the two limiting structures may be two limiting rods fixed in the casing, and in the rotation direction of the flow guide plate, the two limiting rods are respectively in blocking fit with the forward and reverse rotation flow guide plates to limit the two limit positions of the flow guide plate. In other embodiments, an arc-shaped groove can be arranged on the guide plate hinge shaft, a sliding block is arranged on the hole wall of the mounting hole, and the sliding block and the arc-shaped groove are matched to limit the swing angle of the guide plate.

In an embodiment 6 of the hub motor of the present invention, the hub motor in this embodiment is different from the hub motor in embodiment 1 only in that: in this embodiment, set up the mounting hole on the guide plate, the fixed rod tip sets up the guide plate articulated shaft, and the poor device of guide plate articulated shaft is to the mounting hole in.

In an embodiment 7 of the hub motor of the present invention, the hub motor in this embodiment is different from the hub motor in embodiment 1 only in that: in this embodiment, the housing gas channel is used for gas exhaust, and the motor shaft gas channel is used for gas inlet. In other embodiments, the installation manner of the casing and the motor shaft may also be the installation manner disclosed in the patent with the publication number CN204132322U, and the baffle plate is added to the casing.

In an embodiment 8 of the hub motor of the present invention, the hub motor in this embodiment is different from the hub motor in embodiment 1 only in that: in this embodiment, only the gas flow channel is provided in the casing, and no liquid flow channel is provided.

In other embodiments, the windward side of the baffle may also direct the airflow to other heat generating components other than the stator.

In other embodiments, a plurality of baffles may be provided, and the position and the flow guiding direction of each baffle may be different.

In other embodiments, the cross-section of the axially extending flow passage section may itself be annular.

In other embodiments, the casing gas channel and the casing liquid channel may be staggered, specifically: at the axial extension part of the second shell end part, only the first shell axial liquid flow channel section is arranged, but the second shell axial liquid flow channel section is not arranged, meanwhile, on the radial extension part and the peripheral part of the second shell end part, the shaft end shell gas flow channel section and the second shell liquid flow channel section are arranged in a staggered mode, the first peripheral shell gas flow channel section and the third shell liquid flow channel section are arranged in a staggered mode, and the second peripheral shell gas flow channel section and the fourth shell gas flow channel section are arranged in a staggered mode.

In other embodiments, the casing may be in sealing fit with the motor shaft at the communication port of the motor shaft flow channel in other manners, for example, if the first casing end axial extension portion is arranged to extend to the shaft sleeve of the motor shaft along the axial direction of the motor shaft, then the bearing and the rotary seal ring are arranged between the first casing end axial extension portion and the shaft sleeve, and the casing may also be in sealing fit with the motor shaft at the communication port of the motor shaft flow channel.

In other embodiments, the casing gas channel and the casing liquid channel may be staggered, specifically: at the axial extension part of the second shell end part, only the first shell axial liquid flow channel section is arranged, but the second shell axial liquid flow channel section is not arranged, meanwhile, on the radial extension part and the peripheral part of the second shell end part, the shaft end shell gas flow channel section and the second shell liquid flow channel section are arranged in a staggered mode, the first peripheral shell gas flow channel section and the third shell liquid flow channel section are arranged in a staggered mode, and the second peripheral shell gas flow channel section and the fourth shell gas flow channel section are arranged in a staggered mode. In other embodiments, the flowing direction of the cooling liquid in the casing liquid flow passage and the flowing direction of the cool air in the casing gas flow passage may also be the same.

In other embodiments, only one or two first casing liquid flow passage sections and two second casing liquid flow passage sections may be provided; the first shell liquid flow passage section and the second shell liquid flow passage section can also be arranged on the corresponding shell in a turning way at any angle.

Two fourth casing liquid flow channel sections may be provided between adjacent third casing liquid flow channel sections, and then the adjacent third casing liquid flow channel sections are connected end to end and end to end simultaneously.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.

Claims

1. In-wheel motor includes:

a motor shaft;

the stator is fixed on the motor shaft;

the rotor is fixed in the shell;

its characterized in that, in-wheel motor still includes:

the guide plate is movably arranged on the shell so as to change the posture under the action of self gravity when the shell rotates, and the position of the air flow blown to the heating part in the shell is changed by the guide plate through the change of the posture;

the guide plate is hinged in the shell, and a limiting structure for limiting the swing angle of the guide plate is arranged in the shell;

a fixed rod is fixed on the shell, one end of the fixed rod is suspended in the shell, and the guide plate is hinged to one suspended end of the fixed rod;

the end part of the fixed rod is provided with a mounting hole, a guide plate hinged shaft is arranged on the guide plate, the guide plate hinged shaft is inserted into the mounting hole, one of the hole wall of the mounting hole and the guide plate hinged shaft is provided with a sliding block, the other one of the hole wall of the mounting hole and the guide plate hinged shaft is provided with an arc-shaped groove in sliding fit with the sliding block along the circumferential direction of the guide plate hinged shaft, the arc-shaped groove extends along the circumferential direction of the guide plate hinged shaft, the arc-shaped groove and the sliding block form the limiting structure, and the arc-shaped groove is used for being matched with the sliding block in a blocking manner on two groove wall surfaces opposite to the circumferential direction of the guide plate hinged shaft to limit the swing angle of the guide plate.

2. The in-wheel motor of claim 1 wherein the hinge axis of the baffle is coplanar with the motor shaft axis.

3. The in-wheel motor according to claim 1 or 2, wherein the air deflector is a concave arc plate, and the notch on the air deflector faces the heat generating component in the casing.

4. The in-wheel motor of claim 3, wherein the concave arcuate plate is a tile plate.

5. The in-wheel motor according to claim 1 or 2, wherein a housing gas flow passage for introducing gas into the housing is provided in a wall of the housing, a motor shaft gas flow passage for discharging gas in the housing is provided in the motor shaft, the housing gas flow passage is communicated with the heat dissipation channel through a gas supply port, a portion of the housing extending in an axial direction of the motor shaft is an outer peripheral portion, portions at both ends of the outer peripheral portion are housing end portions, the gas supply port is provided in the outer peripheral portion, and the baffle plate is provided at the housing end portions.

6. The hub motor according to claim 1 or 2, wherein the housing is provided with a housing liquid channel for flowing cooling liquid and a housing gas channel for flowing cold air, and the motor shaft is provided with a motor shaft liquid channel for flowing cooling liquid and a motor shaft gas channel for flowing cold air;