Hub motor liquid cooling heat dissipation mechanism for power-assisted bicycle

Abstract

The utility model discloses a hub motor liquid cooling heat dissipation mechanism for a power-assisted bicycle. The hub motor liquid cooling heat dissipation mechanism comprises a motor assembly, a shell assembly, a transmission assembly and a liquid cooling assembly. The shell assembly comprises a second shell and a first shell, and the second shell and the first shell are connected in a fastened mode through bolts. According to the utility model, the insulation cooling liquid in the motor exchanges heat with the external air-cooled radiator, the temperature of the cooling liquid is reduced through the heat exchange between the air flow in the driving process and the external air-cooled radiator, and the cooled cooling liquid is conveyed to the housing I and the housing II through the cooling liquid inlet pipe and the liquid inlet channel, so that the cooling liquid is cooled. Compared with an existing hub motor, the hub motor provided by the utility model has the advantages that the cooling liquid can be cooled through the external air cooling radiator, so that the motor is cooled, and the endurance mileage of a vehicle is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to wheel hub motor technical field, concretely relates to a wheel hub motor liquid cooling heat dissipation mechanism for power-assisted bicycle. BACKGROUND

[0002] Electric vehicles are widely used at home and abroad, among which power-assisted bicycles are very popular. The power-assisted bicycle not only has the pedal function of a bicycle, but also has the power-assisted driving function of an electric vehicle, so that the power-assisted bicycle does not cause too much burden on the rider. The power-assisted bicycle can adjust the power according to different road conditions, which is convenient for users to use. At present, the commonly used one is a wheel hub motor.

[0003] The wheel hub motor in the prior art comprises a rotor, a stator, a wheel hub shell, a middle shaft and a planetary gear reduction mechanism. The conventional wheel hub motor generates heat when the motor rotor set is working during operation. The prior art dissipates heat through the shell. However, the medium between the shell and the rotor is air, and the heat conduction efficiency is not good. If insulation cooling liquid is added, the cooling liquid can still only dissipate heat through the shell, and the heat dissipation efficiency is still not ideal. Overheating of the motor will cause power reduction, increased power consumption, and thus reduced vehicle range.

[0004] Therefore, it is of great significance to provide a wheel hub motor liquid cooling heat dissipation mechanism for a power-assisted bicycle to solve the problems existing in the prior art. UTILITY MODEL CONTENTS

[0005] Therefore, the purpose of the present application is to provide a wheel hub motor liquid cooling heat dissipation mechanism for a power-assisted bicycle to solve the problem that the conventional wheel hub motor generates heat when the motor rotor set is working during operation. The prior art dissipates heat through the shell. However, the medium between the shell and the rotor is air, and the heat conduction efficiency is not good. If insulation cooling liquid is added, the cooling liquid can still only dissipate heat through the shell, and the heat dissipation efficiency is still not ideal. Overheating of the motor will cause power reduction, increased power consumption, and thus reduced vehicle range.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A wheel hub motor liquid cooling heat dissipation mechanism for a power-assisted bicycle comprises a motor assembly, a shell assembly, a transmission assembly and a liquid cooling assembly.

[0008] The shell assembly comprises a shell two and a shell one, and the shell two and the shell one are connected by bolts.

[0009] The motor assembly comprises a rotating bearing, a main shaft, an inner rotor and an outer stator. The inner rotor is rotatably connected to the main shaft through the rotating bearing, the outer stator is fixedly connected to the main shaft, and the inner rotor is installed inside the outer stator.

[0010] The inner rotor is in driving connection with the outer shell two through a transmission assembly;

[0011] The liquid cooling assembly comprises a cooling liquid inlet pipe, an external air-cooled radiator, a cooling liquid return pipe, a pump shell and pump blades; the cooling liquid return pipe and the cooling liquid inlet pipe are respectively arranged at the liquid inlet end and the liquid outlet end of the external air-cooled radiator; one end of the main shaft is provided with a liquid return channel and a liquid inlet channel; the cooling liquid inlet pipe is connected with the liquid inlet channel; the liquid return channel is connected with the liquid inlet end of the pump shell; the cooling liquid return pipe is connected with the liquid outlet end of the pump shell; and the pump blades are arranged in the interior of the pump shell.

[0012] Preferably, the liquid outlet end of the liquid inlet channel and the liquid inlet end of the liquid return channel are both arranged in the interior of the outer shell two; and the liquid inlet end of the liquid return channel is connected with an extension pipe.

[0013] Preferably, the pump shell is fixedly connected with the main shaft; a transmission rod is rotatably connected to one side of the pump shell; one end of the transmission rod is fixedly connected with the pump blades; and the other end of the transmission rod is fixedly connected with a meshing gear.

[0014] Preferably, a transmission gear ring is fixedly connected to the side of the outer shell two close to the pump shell; and the transmission gear ring is in meshing connection with the meshing gear.

[0015] Preferably, the transmission assembly comprises a gear carrier, a planetary gear ring, a planetary gear and a sun gear; the sun gear is in driving connection with the inner rotor; the gear carrier is fixedly connected with the main shaft; the planetary gear ring is fixedly connected with the outer shell two; the sun gear and the planetary gear ring are both in meshing connection with the planetary gear; and the planetary gear is in rotatable connection with the gear carrier.

[0016] Compared with the prior art, the utility model has the advantages of:

[0017] The utility model discloses a heat exchange mode of the insulation cooling liquid in the motor and the external air-cooled radiator, and then the motor is cooled, when the motor runs, the outer shell two rotates, the outer shell two drives the meshing gear to rotate through the transmission gear ring, the meshing gear drives the pump blade to rotate through the transmission rod, the insulation cooling liquid in the outer shell one and the outer shell two is pumped into the pump shell through the extension pipe and the liquid return channel at this time, the cooling liquid is returned to the external air-cooled radiator through the cooling liquid return pipe, and the temperature of the cooling liquid is reduced through the heat exchange between the airflow during driving and the external air-cooled radiator, the cooling liquid after cooling is transported to the outer shell one and the outer shell two through the cooling liquid inlet pipe and the liquid inlet channel, the temperature of the cooling liquid is reduced, and then the motor interior is radiated, compared with the prior art wheel hub motor, the utility model can reduce the temperature of the cooling liquid through the external air-cooled radiator, and then the motor is radiated, and the vehicle cruising range is improved.

[0018] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, so as to be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following will be described in detail with the preferred embodiment of the present application and the accompanying drawings as follows.

[0019] According to the detailed description of the specific embodiments of the present application below in combination with the drawings, those skilled in the art will more clearly understand the above and other purposes, advantages and characteristics of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0021] Figure 1 It is a structural schematic view of the present application;

[0022] Figure 2 It is Figure 1 the enlarged view of A.

[0023] In the drawings: 1, outer shell one; 2, rotating bearing; 3, main shaft; 4, inner rotor; 5, outer stator; 6, planetary gear; 7, gear carrier; 8, cooling liquid inlet pipe; 9, external air cooling radiator; 10, sun gear; 11, cooling liquid return pipe; 12, transmission rod; 13, outer shell two; 14, extension pipe; 15, liquid return channel; 16, transmission gear ring; 17, meshing gear; 18, liquid inlet channel; 19, pump blade; 20, pump shell; 21, planetary gear ring. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all the embodiments. In the following description, the specific details such as specific configurations and components are only provided to help understand the embodiments of the present application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, in order to be clear and concise, the description of known functions and structures is omitted in the embodiments.

[0025] Furthermore, reference numerals and / or letters in the various examples can be repeated in different instances in the specification, and this repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and / or configurations discussed in the specification.

[0026] The term "and / or", merely describes an associated relationship between associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, B alone, and A and B together. The term "and" in this paper describes another relationship between associated objects, which means that there can be two relationships, for example, A and B, which means that there are two cases of A alone and A and B together. In addition, the character " / " in this paper generally means that the associated objects before and after are an "or" relationship.

[0027] It should also be noted that in this paper, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion.

[0028] Please refer to Figures 1-2 The utility model provides a kind of technical scheme for the wheel hub motor liquid cooling heat dissipation mechanism of power-assisted bicycle: including motor assembly, shell assembly, transmission assembly and liquid cooling component;

[0029] Wherein shell assembly includes shell two 13 and shell one 1, shell two 13 and shell one 1 are connected by bolt fastening between them;

[0030] Motor assembly includes rotating bearing 2, main shaft 3, inner rotor 4 and outer stator 5;Inner rotor 4 is rotatably connected with main shaft 3 by rotating bearing 2, outer stator 5 is fixedly connected with main shaft 3, and inner rotor 4 is installed in the inside of outer stator 5;

[0031] Inner rotor 4 is drivingly connected with shell two 13 by transmission assembly;

[0032] Liquid cooling component includes cooling liquid inlet pipe 8, external air cooling radiator 9, cooling liquid return pipe 11, pump shell 20 and pump blade 19;Cooling liquid return pipe 11 and cooling liquid inlet pipe 8 are respectively installed at the liquid inlet end and the liquid outlet end of external air cooling radiator 9, one end of main shaft 3 is provided with liquid return channel 15 and liquid inlet channel 18, cooling liquid inlet pipe 8 is connected with liquid inlet channel 18, liquid return channel 15 is connected with the liquid inlet end of pump shell 20, cooling liquid return pipe 11 is connected with the liquid outlet end of pump shell 20, and pump blade 19 is installed in the inside of pump shell 20.

[0033] The liquid outlet end of the liquid inlet channel 18 and the liquid inlet end of the liquid return channel 15 are located inside the second shell 13, and the liquid inlet end of the liquid return channel 15 is connected with an extension pipe 14.

[0034] The pump shell 20 is fixedly connected with the main shaft 3, one side of the pump shell 20 is rotatably connected with a transmission rod 12, one end of the transmission rod 12 is fixedly connected with the pump blade 19, and the other end of the transmission rod 12 is fixedly connected with a meshing gear 17.

[0035] The second shell 13 is fixedly connected with a transmission gear ring 16 on the side close to the pump shell 20, and the transmission gear ring 16 is in meshing connection with the meshing gear 17.

[0036] The transmission assembly comprises a gear frame 7, a planetary gear ring 21, a planetary gear 6 and a sun gear 10, the sun gear 10 is in transmission connection with the inner rotor 4, the gear frame 7 is fixedly connected with the main shaft 3, the planetary gear ring 21 is fixedly connected with the second shell 13, the sun gear 10 and the planetary gear ring 21 are in meshing with the planetary gear 6, and the planetary gear 6 is in rotation connection with the gear frame 7.

[0037] The inner rotor 4 drives the sun gear 10 to rotate, the sun gear 10 drives the planetary gear ring 21 to rotate through the planetary gear 6, so as to drive the second shell 13 to rotate.

[0038] In the scheme, the cooling liquid is insulation cooling liquid, so as to avoid short circuit in the motor.

[0039] In specific use, when the motor is running, the second shell 13 rotates, the second shell 13 drives the meshing gear 17 to rotate through the transmission gear ring 16, the meshing gear 17 drives the pump blade 19 to rotate through the transmission rod 12, at this time, the insulation cooling liquid in the second shell 13 and the first shell 1 is sucked into the pump shell 20 through the extension pipe 14 and the liquid return channel 16, the cooling liquid is returned to the external air cooling radiator 9 through the cooling liquid return pipe 11, heat exchange is carried out between the air flow during driving and the external air cooling radiator 9, so as to reduce the temperature of the cooling liquid, the cooling liquid after cooling is transported into the second shell 13 and the first shell 1 through the cooling liquid inlet pipe 8 and the liquid inlet channel 18, the cooling of the cooling liquid is completed, and the motor is cooled, compared with the existing hub motor, the cooling liquid can be cooled through the external air cooling radiator, and the motor is cooled, so that the vehicle endurance is improved.

[0040] The above only describes the preferred embodiments of the utility model, and does not limit the protection scope of the utility model, for the person skilled in the art, the utility model can have various changes and variations. Any change, modification, replacement, integration and parameter change of these embodiments within the spirit and principle of the utility model, which can realize the same function without departing from the principle and spirit of the utility model, falls within the protection scope of the utility model.

Claims

1. A wheel hub motor liquid cooling heat dissipation mechanism for an assisted bicycle, characterized in that: The motor assembly, the shell assembly, the transmission assembly and the liquid cooling assembly are included. The shell assembly includes a shell two (13) and a shell one (1), and the shell two (13) and the shell one (1) are connected by bolt fastening. The motor assembly includes a rotating bearing (2), a main shaft (3), an inner rotor (4) and an outer stator (5). The inner rotor (4) is rotatably connected with the main shaft (3) through the rotating bearing (2), the outer stator (5) is fixedly connected with the main shaft (3), and the inner rotor (4) is installed in the inner part of the outer stator (5). The inner rotor (4) is drivingly connected with the shell two (13) through the transmission assembly. The liquid cooling assembly includes a cooling liquid inlet pipe (8), an external air cooling radiator (9), a cooling liquid return pipe (11), a pump shell (20) and a pump blade (19). The cooling liquid return pipe (11) and the cooling liquid inlet pipe (8) are respectively installed at the liquid inlet end and the liquid outlet end of the external air cooling radiator (9). One end of the main shaft (3) is provided with a liquid return channel (15) and a liquid inlet channel (18). The cooling liquid inlet pipe (8) is connected with the liquid inlet channel (18). The liquid return channel (15) is connected with the liquid inlet end of the pump shell (20). The cooling liquid return pipe (11) is connected with the liquid outlet end of the pump shell (20). The pump blade (19) is installed in the inner part of the pump shell (20).

2. A liquid cooling heat dissipation mechanism for a wheel hub motor of an assist bicycle according to claim 1, characterized in that: The liquid outlet end of the liquid inlet channel (18) and the liquid inlet end of the liquid return channel (15) are located in the inner part of the shell two (13). The liquid inlet end of the liquid return channel (15) is connected with an extension pipe (14).

3. A liquid cooling heat dissipation mechanism for a wheel hub motor of an assisted bicycle according to claim 2, characterized in that: The pump shell (20) is fixedly connected with the main shaft (3). The pump shell (20) is rotatably connected with a transmission rod (12) on one side. One end of the transmission rod (12) is fixedly connected with the pump blade (19). The other end of the transmission rod (12) is fixedly connected with an engaging gear (17).

4. A liquid cooling heat dissipation mechanism for a wheel hub motor of an assist bicycle according to claim 3, characterized in that: The shell two (13) is fixedly connected with a transmission gear ring (16) on the side close to the pump shell (20). The transmission gear ring (16) is meshingly connected with the engaging gear (17).

5. A liquid cooling heat dissipation mechanism for a wheel hub motor of an assist bicycle as claimed in claim 4, characterized in that: The transmission assembly includes a gear carrier (7), a planetary gear ring (21), a planetary gear (6) and a sun gear (10). The sun gear (10) is drivingly connected with the inner rotor (4). The gear carrier (7) is fixedly connected with the main shaft (3). The planetary gear ring (21) is fixedly connected with the shell two (13). The sun gear (10) and the planetary gear ring (21) are both meshed with the planetary gear (6). The planetary gear (6) is rotatably connected with the gear carrier (7).

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