New energy automobile power assembly system based on brushless permanent magnet motor

Abstract

The invention relates to the technical field of brushless permanent magnet motors, in particular to a new energy automobile power assembly system based on a brushless permanent magnet motor. The device comprises a mounting base arranged at one end of an automobile chassis, a pair of wheels are rotationally connected to the two sides, away from each other, of the mounting base, a power mechanism is arranged on the inner bottom wall of the mounting base, and the power mechanism at least comprises a motor body; the motor body is provided with a water cooling mechanism along the radial direction; in the new energy automobile power assembly system based on the brushless permanent magnet motor, the two wheels are driven to rotate through the arranged power mechanism so that the mounting base and the chassis can advance, the water cooling mechanism is used for containing cooling liquid so as to absorb heat generated in the working process of the motor body, and wind resistance in the advancing process of the mounting base drives the stirring mechanism to rotate so as to stir the motor body. The stirring mechanism is used for stirring cooling liquid contained in the water cooling mechanism; the stirring mechanism can guide heat of cooling liquid in the water cooling mechanism to be conducted to the outside.

Description

Technical Field

[0001] The present invention relates to the technical field of brushless permanent magnet motors, and in particular to a new energy vehicle powertrain system based on a brushless permanent magnet motor. Background Art

[0002] New energy vehicles refer to vehicles that use unconventional automotive fuels as a power source and integrate advanced technologies in vehicle power control and drive to form advanced technical principles, new technologies, and new structures. Their powertrain systems mainly include battery packs, brushless permanent magnet motors and their controllers, and transmission systems. When brushless permanent magnet motors and their controllers are in operation for a long time, the motor windings will generate a lot of heat due to the continuous flow of current through the motor windings. If this heat is not removed from the brushless permanent magnet motor in time, the motor efficiency will decrease, the service life will be reduced, and even fire and other dangers will be caused.

[0003] In the related art, the invention patent with the announcement number CN107379959B discloses a motor cooling system for a new energy vehicle, which includes a motor controller, a gear box, and a motor. A water tank is arranged outside the gear box. The motor controller includes at least one radiator. The water sent out of the water tank enters the radiator through the water inlet of the right box through the channel. The water discharged from the radiator enters the left box through the water outlet of the right box. The water discharged from the left box passes through the casing and finally flows back to the water tank. There is also some water at the connection between the water tank and the right box. Under the action of pressure and gravity, it passes through the surface inlet of the right box, passes through the left box, and then passes through the pipeline into the conical tube, and finally flows back to the water tank. It can be seen that in the prior art, the heat generated by the motor of the new energy vehicle during operation can be taken away in time by the water cooling system to reduce the adverse effects caused by the accumulation of heat around the motor.

[0004] Regarding the motor cooling system of a new energy vehicle proposed in the above patent, during the operation of the new energy vehicle, the brushless permanent magnet motor starts to work and gradually generates heat. However, the heat generated by the motor in different parts is different, that is, the temperature of the water in the water tank is uneven at different positions. Although the water can cool the water heated by the casing by circulating through the radiator, additional driving force is required for the water to flow from the water tank to the radiator and then to the casing to form a circulation loop. This not only increases the energy consumption of new energy vehicles and brings endurance concerns to car owners, but also generates additional heat when the driving force passes through the above-mentioned water circulation loop, which causes the heat dissipation effect of the above-mentioned motor cooling system to be weakened compared to the theoretical heat dissipation effect.

[0005] In view of this, we propose a new energy vehicle powertrain system based on a brushless permanent magnet motor to improve the deficiencies in the existing technology. Summary of the invention

[0006] The purpose of the present invention is to provide a new energy vehicle powertrain system based on a brushless permanent magnet motor to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides a new energy vehicle powertrain system based on a brushless permanent magnet motor, comprising a mounting seat arranged at one end of a vehicle chassis, a pair of wheels being rotatably connected to two sides of the mounting seat that are away from each other, and a power mechanism being arranged on the inner bottom wall of the mounting seat, wherein the power mechanism at least comprises a motor body;

[0008] The motor body is provided with a water cooling mechanism along its radial direction, and a stirring mechanism is provided on the upper and lower sides of the mounting seat at the bottom of the water cooling mechanism;

[0009] The power mechanism drives the two wheels to rotate so that the mounting seat moves forward. The water cooling mechanism is used to contain coolant to absorb the heat generated during the operation of the motor body. The wind resistance during the forward movement of the mounting seat drives the stirring mechanism to rotate, which is used to stir the coolant contained in the water cooling mechanism.

[0010] The stirring mechanism can guide the heat of the coolant in the water cooling mechanism to be transferred to the outside.

[0011] As a further improvement of the present technical solution, the power mechanism further includes a reducer body, the input shaft of the reducer body is coaxially connected to the output shaft of the motor body, and the two connecting flanges of the reducer body are coaxially connected to the two wheels respectively.

[0012] As a further improvement of the present technical solution, the water cooling mechanism includes a limit seat, the two sides of the limit seat are fixedly connected to the periphery of the motor body, and the top of the limit seat is fixedly connected to a sealing shell. The outer wall of the casing of the motor body, the inner wall of the limit seat, the inner bottom wall of the mounting seat and the inner wall of the sealing shell form a liquid storage chamber.

[0013] As a further improvement of the present technical solution, the stirring mechanism includes a guide rod rotatably connected to the inner bottom wall of the mounting seat, the guide rod passes through the mounting seat, one end of the guide rod located on the inner bottom wall of the mounting seat is coaxially connected to the stirring blade, and one end of the guide rod located on the outer bottom wall of the mounting seat is coaxially connected to a wind drive mechanism.

[0014] As a further improvement of the present technical solution, the wind drive mechanism includes at least a pair of upper fixed plates and lower fixed plates spaced apart, the wind drive mechanism also includes a drive blade coaxially connected to the guide rod, the upper fixed plate is fixedly connected to the outer bottom wall of the mounting seat, a plurality of wind guide plates are fixedly connected between the upper fixed plate and the lower fixed plate, and the radial angle formed between each of the wind guide plates and the upper fixed plate is between 0°-90°.

[0015] As a further improvement of the technical solution, each of the air guide plates is distributed in a ring array between the upper fixed plate and the lower fixed plate.

[0016] As a further improvement of the present technical solution, the guide rod, the stirring blade and the air guide plate are all made of heat-conducting materials.

[0017] As a further improvement of the technical solution, the cooling liquid occupies 80%-90% of the maximum capacity of the liquid storage chamber.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the new energy vehicle powertrain system based on the brushless permanent magnet motor, the two wheels are driven to rotate by a provided power mechanism to move the mounting seat and the chassis forward; the water cooling mechanism is used to contain coolant to absorb the heat generated during the operation of the motor body; the wind resistance during the forward movement of the mounting seat drives the stirring mechanism to rotate, which is used to stir the coolant contained in the water cooling mechanism; the stirring mechanism can guide the heat of the coolant in the water cooling mechanism to be transferred to the outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a partially cutaway perspective view of the present invention;

[0022] Figure 3 It is a partially cut-away left view of the present invention;

[0023] Figure 4 It is a three-dimensional structural diagram of the power mechanism of the present invention;

[0024] Figure 5 is a cutaway perspective view of the water cooling mechanism of the present invention;

[0025] Figure 6 is a cutaway perspective view of the stirring mechanism of the present invention;

[0026] Figure 7 It is a front view of the stirring mechanism of the present invention;

[0027] Figure 8 It is a cutaway perspective view of the wind drive mechanism of the present invention;

[0028] Fig. 9 The second is a cutaway perspective view of the wind drive mechanism of the present invention;

[0029] Fig.10 It is a front view of the wind drive mechanism of the present invention.

[0030] The meaning of each number in the figure is:

[0031] 100, mounting seat;

[0032] 200, power mechanism; 210, motor body; 220, reducer body;

[0033] 300, water cooling mechanism; 310, limit seat; 320, sealing shell;

[0034] 400, stirring mechanism; 410, guide rod; 420, stirring blade; 430, wind driving mechanism;

[0035] 431, driving blade; 432, upper fixing plate; 433, lower fixing plate; 434, air guide plate. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In order to increase the cooling effect of the water cooling system (ie, the water cooling mechanism 300 to be described below), the present invention adds a stirring system (ie, the stirring mechanism 400 to be described below) inside the water cooling system so that the heat absorbed by the coolant is evenly distributed.

[0038] See also Figure 1-Figure 3 As shown, the purpose of this embodiment is to provide a new energy vehicle powertrain system based on a brushless permanent magnet motor, including a mounting seat 100 arranged at one end of the vehicle chassis, a pair of wheels are rotatably connected to two sides of the mounting seat 110 that are away from each other, and a power mechanism 200 is provided on the inner bottom wall of the mounting seat 120, and the power mechanism 200 at least includes a motor body 210;

[0039] The motor body 210 is provided with a water cooling mechanism 300 along its radial direction, and a stirring mechanism 400 is provided at the bottom of the water cooling mechanism 300 on both upper and lower sides of the mounting seat 100;

[0040] The power mechanism 200 drives the two wheels to rotate so that the mounting seat 100 moves forward. The water cooling mechanism 300 is used to contain coolant to absorb the heat generated during the operation of the motor body 210. The wind resistance during the forward movement of the mounting seat 100 drives the stirring mechanism 400 to rotate, which is used to stir the coolant contained in the water cooling mechanism 300.

[0041] The stirring mechanism 400 can guide the heat of the coolant in the water cooling mechanism 300 to be transferred to the outside.

[0042] Working principle: After the new energy vehicle is started, the power mechanism 200 drives the chassis 100 to move forward. During the operation of the power mechanism 200, the motor body 210 will inevitably generate heat, which is gathered on the casing of the motor body 210. The water cooling mechanism 300 absorbs the heat on the casing of the motor body 210. Since the functions and loads of different components inside the motor body 210 are different, the heat at different positions of the casing is also different. At this time, the wind resistance during the driving of the new energy vehicle drives the stirring mechanism 400 to work, stirring the coolant in the water cooling mechanism 300, so that the heat can be evenly dispersed in the coolant.

[0043] As the new energy vehicle travels longer distances, the coolant is gradually heated by the housing of the motor body 210, and the cooling effect is reduced compared to when the new energy vehicle is just started. The stirring mechanism 400 uses its own material properties to guide the heat contained in the heated coolant to the outside, thereby reducing the temperature of the coolant.

[0044] like Figure 4 As shown, the power mechanism 200 further includes a reducer body 220, an input shaft of the reducer body 220 is coaxially connected to an output shaft of the motor body 210, and two connecting flanges of the reducer body 220 are coaxially connected to two wheels respectively.

[0045] That is to say, after starting the new energy vehicle, the output shaft of the motor body 210 drives the input shaft of the reducer body 220 to rotate, and the reducer body 220 is usually composed of a plurality of gears of different sizes. The output shaft of the motor body 210 is connected to the input shaft of the reducer body 220, and the high-speed rotational motion of the motor body 210 is transmitted to the input gear of the reducer body 220. Through a series of intermeshing gear sets, the gear ratios of the large gear and the small gear are different, which can achieve a reduction in speed and an increase in torque. For example, a reducer body 220 with a transmission ratio of 10:1, driven by the output shaft of the motor body 210 with an input speed of 1000 rpm, the output speed will become 100 rpm, and the torque will increase to 10 times the original.

[0046] The motor body 210 will inevitably generate heat when working, and the heat will gather around the casing for a long time, which will affect the working efficiency and service life of the motor body 210. Therefore, a water cooling mechanism 300 is arranged in the radial direction of the casing of the motor body 210.

[0047] exist Figure 5 In the figure, the water cooling mechanism 300 includes a limit seat 310, the two sides of the limit seat 310 are fixedly connected to the periphery of the motor body 210, and the top of the limit seat 310 is fixedly connected to a sealing shell 320. The outer wall of the casing of the motor body 210, the inner wall of the limit seat 310, the inner bottom wall of the mounting seat 100 and the inner wall of the sealing shell 320 form a liquid storage chamber.

[0048] It should be noted that the coolant occupies 80%-90% of the maximum capacity of the liquid storage chamber, and the coolant can be water.

[0049] When the motor body 210 is working, the heat generated will be dissipated to the surroundings through the casing and absorbed by the coolant wrapped around the casing. However, water will expand and contract when the temperature changes. If the liquid storage chamber is completely filled, when the water temperature rises, the expansion of the water may cause the liquid storage chamber to rupture or other parts to be damaged. Therefore, in actual operation, a certain amount of space, usually about 10% of the liquid storage chamber capacity, is generally reserved at the top of the liquid storage chamber for water expansion. In addition, the normal operation of the automobile cooling system requires a certain amount of water circulation and pressure. If there is too little water in the liquid storage chamber, it may affect the circulation efficiency of the coolant, resulting in poor heat dissipation of key components such as the motor body 210. Therefore, it is generally recommended to add water to the liquid storage chamber to about 80%-90% of the maximum capacity, so that there is enough coolant for heat dissipation, and space can be reserved to deal with the expansion of water, while reducing the adverse effects of water shaking on vehicle stability.

[0050] Due to the influence of factors such as the thermal effect of current, skin effect, and hysteresis loss, different amounts of heat will be generated around the casing, resulting in different temperatures of the coolant in the liquid storage chamber. More heat will accumulate around parts that are prone to heat generation, while relatively less heat will accumulate around parts that are not prone to heat generation. Over time, the heat dissipation effect of parts that are prone to heat accumulation on the casing of the motor body 210 will decrease. Therefore, a stirring mechanism 400 is provided in the liquid storage chamber to ensure uniform distribution of heat in the coolant.

[0051] Next, through Figure 6 and Figure 7 The specific structure of the stirring mechanism 400 is disclosed. The stirring mechanism 400 includes a guide rod 410 rotatably connected to the inner bottom wall of the mounting seat 100, the guide rod 410 passes through the mounting seat 100, one end of the guide rod 410 located on the inner bottom wall of the mounting seat 100 is coaxially connected to a stirring blade 420, and one end of the guide rod 410 located on the outer bottom wall of the mounting seat 100 is coaxially connected to a wind drive mechanism 430.

[0052] As the working time of the motor body 210 increases, more heat is accumulated around the parts of the motor body 210 that are prone to generate heat. During this period, the new energy vehicle will be subject to wind resistance during driving. According to Newton's third law, the action of force is mutual, so the wind resistance will drive the wind drive mechanism 430 to drive the stirring blade 420 to rotate in the liquid storage chamber, thereby stirring the water with originally uniform heat distribution in the liquid storage chamber.

[0053] Based on the above description of the stirring mechanism 400, Figure 8-Figure 10The wind drive mechanism 430 is further explained as comprising at least a pair of upper fixed plates 432 and lower fixed plates 433 spaced apart from each other. The wind drive mechanism 430 also comprises a drive blade 431 coaxially connected to the guide rod 410. The upper fixed plate 432 is fixedly connected to the outer bottom wall of the mounting base 100. A plurality of wind guide plates 434 are fixedly connected between the upper fixed plate 432 and the lower fixed plate 433. The radial angle formed between each wind guide plate 434 and the upper fixed plate 432 is between 0° and 90°.

[0054] Furthermore, each air guide plate 434 is distributed in a ring array between the upper fixing plate 432 and the lower fixing plate 433 .

[0055] Furthermore, the guide rod 410 , the stirring blade 420 , and the air guide plate 434 are all made of heat-conducting materials.

[0056] That is to say, during the driving process of the car, wind continuously passes through each wind guide plate 434. The inclined wind guide plate 434 ensures that the wind passing through the upper fixed plate 432 and the lower fixed plate 433 blows toward the driving blade 431 from the side, so that the driving blade 431 can provide sufficient driving force for the rotation of the stirring blade 420. The lower fixed plate 433 under the driving blade 431 is used to protect the driving blade 431 from being hit by stones stirred up by the wheels during the forward movement of the car.

[0057] In addition, the guide rod 410, the stirring blade 420 and the air guide plate 434 can be made of copper alloy, aluminum alloy, graphene and carbon fiber reinforced plastic, etc. These materials have high thermal conductivity and can effectively transfer the heat of the coolant to the driving blade 431, thereby conducting the heat to the outside. At the same time, the density is relatively small and the weight is light, which is conducive to the driving blade 431 to drive the stirring blade 420 to rotate at a high speed, thereby enhancing the stirring effect of the coolant and improving the heat dissipation efficiency.

[0058] In summary, the working principle of the present invention is as follows:

[0059] After the new energy vehicle is started, the output shaft of the motor body 210 drives the input shaft of the reducer body 220 to rotate, and the reducer body 220 then transmits the rotational driving force to the wheels through the connecting flange via the internal gear set. During the driving process of the car, the motor body 210 will inevitably generate heat, and the generated heat will be dissipated to the surroundings through the casing and absorbed by the coolant wrapped around the outer periphery of the casing.

[0060] Since the functions and loads of different components inside the motor body 210 are different, the heat at different positions of the casing is also different. The new energy vehicle will be subject to wind resistance during driving. Since the force is mutual, the wind resistance will drive the wind driving mechanism 430 to drive the stirring blade 420 to rotate in the liquid storage chamber, thereby stirring the water in the liquid storage chamber with uniform heat distribution, so that the heat can be evenly dispersed in the coolant.

[0061] As the working time of the motor body 210 increases, the cooling effect of the coolant decreases due to the heating of the casing. The guide rod 410, the stirring blade 420 and the air guide plate 434 structure made of heat dissipation material have high thermal conductivity and can effectively transfer the heat of the coolant to the driving blade 431, thereby conducting the heat to the outside. At the same time, the density is relatively small and the weight is light, which is conducive to the driving blade 431 to drive the stirring blade 420 to rotate at a high speed, thereby enhancing the stirring effect of the coolant and improving the heat dissipation efficiency.

[0062] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A new energy vehicle powertrain system based on a brushless permanent magnet motor, comprising a mounting seat (100) arranged at one end of a vehicle chassis, a pair of wheels being rotatably connected to two sides of the mounting seat (110) that are away from each other, a power mechanism (200) being arranged on the inner bottom wall of the mounting seat (120), the power mechanism (200) at least comprising a motor body (210), characterized in that: The motor body (210) is provided with a water cooling mechanism (300) along its radial direction, and a stirring mechanism (400) is provided at the bottom of the water cooling mechanism (300) on both upper and lower sides of the mounting seat (100); The power mechanism (200) drives the two wheels to rotate so that the mounting seat (100) moves forward; the water cooling mechanism (300) is used to contain cooling liquid to absorb heat generated during the operation of the motor body (210); the wind resistance during the forward movement of the mounting seat (100) drives the stirring mechanism (400) to rotate so as to stir the cooling liquid contained in the water cooling mechanism (300); The stirring mechanism (400) can guide the heat of the coolant in the water cooling mechanism (300) to be transferred to the outside.

2. The new energy vehicle powertrain system based on a brushless permanent magnet motor according to claim 1 is characterized in that: The power mechanism (200) further comprises a reducer body (220), the input shaft of the reducer body (220) being coaxially connected to the output shaft of the motor body (210), and the two connecting flanges of the reducer body (220) being coaxially connected to the two wheels respectively.

3. The new energy vehicle powertrain system based on a brushless permanent magnet motor according to claim 1 is characterized in that: The water cooling mechanism (300) comprises a limit seat (310), the two sides of the limit seat (310) being fixedly connected to the periphery of the motor body (210) at a distance from each other, the top of the limit seat (310) being fixedly connected to a sealing shell (320), and the outer wall of the casing of the motor body (210), the inner wall of the limit seat (310), the inner bottom wall of the mounting seat (100) and the inner wall of the sealing shell (320) forming a liquid storage cavity.

4. The new energy vehicle powertrain system based on a brushless permanent magnet motor according to claim 1 is characterized in that: The stirring mechanism (400) comprises a guide rod (410) rotatably connected to the inner bottom wall of the mounting seat (100), the guide rod (410) passing through the mounting seat (100), one end of the guide rod (410) located on the inner bottom wall of the mounting seat (100) being coaxially connected to a stirring blade (420), and one end of the guide rod (410) located on the outer bottom wall of the mounting seat (100) being coaxially connected to a wind driving mechanism (430).

5. The new energy vehicle powertrain system based on a brushless permanent magnet motor according to claim 4 is characterized in that: The wind driving mechanism (430) comprises at least a pair of upper fixing plates (432) and lower fixing plates (433) which are spaced apart from each other. The wind driving mechanism (430) further comprises a driving blade (431) which is coaxially connected to the guide rod (410). The upper fixing plate (432) is fixedly connected to the outer bottom wall of the mounting seat (100). A plurality of wind guide plates (434) are fixedly connected between the upper fixing plate (432) and the lower fixing plate (433). The radial angle formed between each of the wind guide plates (434) and the upper fixing plate (432) is between 0° and 90°.

6. The new energy vehicle powertrain system based on a brushless permanent magnet motor according to claim 5 is characterized in that: Each of the air guide plates (434) is distributed in a ring array between the upper fixing plate (432) and the lower fixing plate (433).

7. The new energy vehicle powertrain system based on a brushless permanent magnet motor according to claim 5 is characterized in that: The guide rod (410), the stirring blade (420) and the air guide plate (434) are all made of heat-conducting materials.

8. The new energy vehicle powertrain system based on a brushless permanent magnet motor according to claim 3 is characterized in that: The cooling liquid occupies 80%-90% of the maximum capacity of the liquid storage chamber.

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