CN217994709U - Inner rotor hub motor and electric two-wheel vehicle using same - Google Patents
Inner rotor hub motor and electric two-wheel vehicle using same Download PDFInfo
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- CN217994709U CN217994709U CN202222169910.5U CN202222169910U CN217994709U CN 217994709 U CN217994709 U CN 217994709U CN 202222169910 U CN202222169910 U CN 202222169910U CN 217994709 U CN217994709 U CN 217994709U
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Abstract
An inner rotor hub motor and an electric two-wheeled vehicle using the same, comprising a speed reducing motor, a hub driven by the speed reducing motor and a support shaft penetrating through the speed reducing motor and the hub; the inner rotor motor comprises an outer stator fixed in the shell and an inner rotor arranged in the middle of the outer stator, wherein a cylindrical rotating shaft is arranged in the middle of the inner rotor, and a power gear is arranged on the cylindrical rotating shaft; the speed reducing mechanism comprises a cylinder type output shaft and a speed reducing gear set which are arranged in the shell, one end of the cylinder type output shaft extends out of the shell and is connected with the hub, and the other end of the cylinder type output shaft is provided with an output gear. According to the utility model provides an inner rotor in-wheel motor compares with prior art and has following advantage: the utility model adopts the above structure not only changes traditional in-wheel motor's external rotor drive form into inner rotor drive form, through holding with adding of reduction gears, realizes converting motor body's high-speed little torque into wheel hub's low-speed big torque, improves in-wheel motor's output torque, promotes electric bicycle's climbing ability.
Description
Technical Field
The utility model relates to an electric bicycle field, concretely relates to inner rotor in-wheel motor and use this in-wheel motor's electric bicycle.
Background
As a convenient and economic transportation tool, the electric two-wheeled vehicle is widely applied to daily transportation and travel of people, and the conventional electric vehicle usually adopts a hub motor as driving force. The hub motor, also called built-in wheel motor, features that the power, transmission and braking devices are integrated into the hub, so greatly simplifying the mechanical part of electric vehicle. For example, chinese patent CN203933171U discloses an electric vehicle hub motor, which comprises a stator, a rotor and a motor shaft, wherein the stator and the motor shaft are circumferentially positioned, and the rotor is sleeved outside the stator. The torque of the hub motor is directly transmitted to the rear wheel, so the hub motor has the following defects: the output torque of the rear wheel is limited by the power of the motor, and the climbing capability is poor; under the working condition of heavy load, the motor generates heat seriously and is easy to burn.
Therefore, in order to increase the wheel torque and improve the climbing capability of the electric vehicle, a side-hung motor and a middle-mounted motor which are matched with a speed reducing mechanism by the motor are provided. For example, chinese patent CN206598951U discloses an electric vehicle with a side-mounted driving device and a side-mounted driving device thereof, wherein the side-mounted driving device comprises a fork body, a motor is arranged at the rear of the outer side of the fork body, a gear cavity is integrally formed at the inner side of the fork body, an output shaft of the motor extends into the gear cavity, a reduction gear set and a wheel shaft are arranged in the gear cavity, the fork body is connected with a vehicle frame when in use, a rear wheel of the electric vehicle is mounted on the wheel shaft, and the other end of the wheel shaft is mounted on a rear fork symmetrical to the fork body. The motor drives the wheel shaft to rotate through the reduction gear set during working, the rotating speed of the wheel shaft is reduced in the process, the torque is improved, and the climbing and accelerating capacity of the electric vehicle can be enhanced.
For another example, chinese patent CN206954443U discloses a connection structure of a mid-motor and a rear wheel hub, which includes a rear fork, including a connecting shaft and two parallel arm levers vertically arranged on the connecting shaft; further comprising: the motor is positioned at the front end of the rear bottom fork; the rear wheel hub is positioned at the rear end of the rear bottom fork and is connected with the two arm rods; the driving wheel is fixedly connected to an output shaft of the motor; the driven wheel is positioned on one side of the hub of the rear wheel and is positioned on the same side as the driving wheel; the driving wheel is connected with the driven wheel.
In order to facilitate the installation of the side-hung motor and the middle-mounted motor, a specially-made rear bottom fork is usually required for connecting the motor and the speed reducing mechanism, so that the manufacturing cost is high; in addition, the side-hung motor is installed in an offset manner and is arranged at one side of the bottom fork, so that the gravity center of the whole vehicle is unstable, and the attractive appearance is influenced; the middle motor is arranged at the front part of the rear bottom fork, so that the requirement on the installation space of the rear bottom fork is high, and the universality is poor.
The inner rotor speed reduction hub motor can overcome the technical problems, not only can the climbing and accelerating capacity of the electric vehicle be enhanced, but also the motor part is arranged in the middle of the hub, so that when the inner rotor speed reduction hub motor is used for the existing electric two-wheeled vehicle, the rear bottom fork of the electric vehicle does not need to be reformed, the direct interchange with the existing hub motor can be realized, the frame does not need to be reformed, and the assembly universality is strong; however, when the speed reduction hub motor of the inner rotor adopts the planetary speed reduction mechanism, because the number of parts of the planetary speed reduction mechanism is large, on one hand, the assembly difficulty of the product is improved, on the other hand, the weight of the speed reduction hub motor of the inner rotor can be increased, and on the other hand, the transmission loss caused by the large number of power transmission parts is large.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's is not enough, provide an inner rotor in-wheel motor and use this in-wheel motor's electric bicycle.
According to the utility model provides a main technical scheme that inner rotor in-wheel motor adopted does: the device comprises a speed reducing motor, a wheel hub driven by the speed reducing motor and a supporting shaft penetrating through the speed reducing motor and the wheel hub; the speed reducing motor comprises a shell, an inner rotor motor and a speed reducing mechanism, wherein the inner rotor motor and the speed reducing mechanism are arranged in the shell; the inner rotor motor comprises an outer stator fixed in the shell and an inner rotor arranged in the middle of the outer stator, wherein a cylindrical rotating shaft is arranged in the middle of the inner rotor, and a power gear is arranged on the cylindrical rotating shaft; the speed reducing mechanism comprises a cylinder type output shaft and a speed reducing gear set which are arranged in the shell, one end of the cylinder type output shaft extends out of the shell and is connected with the hub, and the other end of the cylinder type output shaft is provided with an output gear; the reduction gear set comprises a driving gear meshed with the power gear and a driven gear meshed with the output gear; the support shaft penetrates through the shell, the cylinder type rotating shaft and the cylinder type output shaft; the supporting shaft is fixedly connected with the shell, and the cylinder type rotating shaft and the cylinder type output shaft are in running fit with the supporting shaft; the axial lead of the supporting shaft, the axial lead of the barrel type rotating shaft, the axial lead of the barrel type output shaft and the axial lead of the wheel hub are superposed on a straight line; the hub is an eccentric hub, the hub comprises a rim and a spoke connected with the inner wall of the rim, a shaft hole is formed in the middle of the spoke, a cylindrical output shaft is connected with the shaft hole, the spoke is close to one side edge of the rim, an accommodating cavity is formed between the spoke and the rim, the speed reducing motor is partially positioned in the accommodating cavity, the ratio of the axial projection area of the speed reducing motor to the axial projection area of the rim is 0.78-1.21, and at least 54.9% -70.1% of the axial projection of the speed reducing motor coincides with the axial projection of the rim.
The utility model provides an inner rotor in-wheel motor still adopts following attached technical scheme:
the reduction gear set comprises a driving gear and a driven gear which are fixed together, the driving gear and the driven gear are concentrically arranged, the driving gear is meshed with the power gear, and the driven gear is meshed with the output gear; the number of teeth of the power gear is smaller than that of the driving gear, the number of teeth of the driven gear is smaller than that of the output gear, the number of teeth of the driving gear is larger than that of the driven gear, and the power gear and the output gear are arranged concentrically.
A supporting seat is arranged in the machine shell, a first supporting shaft hole is formed in the supporting seat, a first bearing is arranged between the inner wall of the cylindrical rotating shaft and the outer wall of the supporting shaft, and a second bearing is arranged between the outer wall of the cylindrical rotating shaft and the inner wall of the first supporting shaft hole;
the shell side wall is provided with a second supporting shaft hole, the cylinder type output shaft extends out of the shell from the second supporting shaft hole and is connected with the wheel hub, a third bearing is arranged between the inner wall of the cylinder type output shaft and the outer wall of the supporting shaft, and a fourth bearing is arranged between the outer wall of the cylinder type output shaft and the inner wall of the second supporting shaft hole.
At least one section of the axial direction in the shaft hole is a supporting part, and a fifth bearing is arranged between the inner wall of the supporting part and the outer wall of the supporting shaft.
One section of the shaft hole, which is close to the speed reducing motor, is provided with an internal spline, the cylindrical output shaft is provided with an external spline, and the internal spline is matched with the external spline; and one section of the shaft hole, which is far away from the speed reducing motor, is the supporting part.
The motor cabin and the speed reducing cabin are arranged in the casing, the inner rotor motor is located in the motor cabin, the speed reducing mechanism is located in the speed reducing cabin, and the center lines of the motor cabin and the speed reducing cabin are overlapped.
The casing is including the cabin lid, divide the storehouse board and the speed reduction storehouse lid that link together, divides the storehouse board to be located between cabin lid and the speed reduction storehouse lid, and cabin lid and divide to form between the storehouse board the motor storehouse, speed reduction storehouse lid and divide to form between the storehouse board the speed reduction storehouse, back shaft wear to establish in cabin lid, branch storehouse board and speed reduction storehouse lid.
An oil pool is formed in a space below a horizontal plane where the supporting shaft is located in the speed reduction bin, and the speed reduction gear set is located in the oil pool; and an air inlet and outlet valve is arranged on the side wall of the speed reduction bin above the horizontal plane where the support shaft is located.
The oil pool bottom wall is provided with an oil injection and discharge port, and the oil injection and discharge port is provided with an oil shell bolt.
An oil baffle plate is arranged in the speed reduction bin and is positioned between the speed reduction mechanism and the air inlet and outlet valve.
The supporting shaft is further provided with a rotation stopping sheet, the supporting shaft is provided with a rotation stopping section, the rotation stopping section is matched with the rotation stopping sheet in a rotation stopping mode, and the rotation stopping sheet is fixedly connected with the shell.
The middle part of the rotation stopping sheet is provided with a rotation stopping hole, the rotation stopping section is inserted into the rotation stopping hole and is matched with the rotation stopping Kong Zhizhuai, and the longitudinal section of the rotation stopping section is any one of square, kidney-shaped and arc; the rotation stopping hole is any one of a square hole, a waist-shaped hole and an arched hole.
The rotation stopping sheet is fixedly connected with the shell by screws.
An oil-proof sealing ring is arranged between the outer wall of the cylindrical rotating shaft and the inner wall of the first supporting shaft hole, a first waterproof sealing ring is arranged between the inner wall of the cylindrical rotating shaft and the outer wall of the supporting shaft, and a radial plane where the first waterproof sealing ring is located between the first bearing and the second bearing; a second waterproof sealing ring is arranged between the inner wall of the second support shaft hole and the outer wall of the cylindrical output shaft; and a third waterproof sealing ring is arranged between the inner wall of the cylinder output shaft and the outer wall of the support shaft, and the radial plane where the third waterproof sealing ring is located at one end, close to the hub, of the cylinder output shaft.
According to the utility model provides a main technical scheme that electric bicycle adopted does: the bicycle comprises a frame, a battery pack arranged on the frame, a front wheel arranged on the frame and a rear wheel arranged on the frame, wherein the rear wheel comprises a hub motor and a tire arranged on the hub motor; the speed reducing motor comprises a shell, an inner rotor motor and a speed reducing mechanism, wherein the inner rotor motor and the speed reducing mechanism are arranged in the shell; the inner rotor motor comprises an outer stator fixed in the shell and an inner rotor arranged in the middle of the outer stator, wherein a cylinder type rotating shaft is arranged in the middle of the inner rotor, and a power gear is arranged on the cylinder type rotating shaft; the speed reducing mechanism comprises a cylinder type output shaft and a speed reducing gear set which are arranged in the shell, one end of the cylinder type output shaft extends out of the shell and is connected with the hub, and the other end of the cylinder type output shaft is provided with an output gear; the reduction gear set comprises a driving gear meshed with the power gear and a driven gear meshed with the output gear; the support shaft penetrates through the shell, the cylinder type rotating shaft and the cylinder type output shaft; the supporting shaft is fixedly connected with the shell, and the cylinder type rotating shaft and the cylinder type output shaft are in running fit with the supporting shaft; the axial lead of the supporting shaft, the axial lead of the barrel type rotating shaft, the axial lead of the barrel type output shaft and the axial lead of the wheel hub are superposed on a straight line; the hub is an eccentric hub, the hub comprises a rim and a spoke connected with the inner wall of the rim, a shaft hole is formed in the middle of the spoke, a cylindrical output shaft is connected with the shaft hole, the spoke is close to one side edge of the rim, an accommodating cavity is formed between the spoke and the rim, the speed reducing motor is partially positioned in the accommodating cavity, the ratio of the axial projection area of the speed reducing motor to the axial projection area of the rim is 0.78-1.21, and at least 54.9% -70.1% of the axial projection of the speed reducing motor coincides with the axial projection of the rim.
According to the utility model provides an inner rotor in-wheel motor compares with prior art and has following advantage: firstly, the utility model adopts the above structure not only changes the traditional external rotor driving form of the hub motor into the internal rotor driving form, but also realizes the conversion of the high-speed small torque of the motor body into the low-speed large torque of the hub by the additional holding of the speed reducing mechanism, improves the output torque of the hub motor, promotes the climbing capability of the electric two-wheel vehicle, and reduces the temperature rise of the hub motor under the large load working condition; secondly, the motor and the speed reducing mechanism are reasonably arranged through the structure, and are placed on the inner side of the hub, so that the space occupation ratio of the motor body and the speed reducing mechanism is reduced, the rear bottom fork of the electric two-wheel vehicle can be connected and assembled through the supporting shaft, the direct exchange with the existing hub motor is realized, the frame does not need to be modified, and the assembly universality is strong; thirdly, the shell of the motor is not connected with the hub, so that the heat dissipation performance of the motor is better, and the service life of the motor is longer; finally, the utility model discloses an inner rotor wheel hub motor adorns at same two wheeler frame with the outer rotor wheel hub motor among the prior art, adopt the battery of same electric quantity etc, under the same test condition, the electric motor car adopts this inner rotor wheel hub motor, the motor operation is under high-speed, power density is big, efficiency platform is wide, response speed is fast, increase output torque through reduction gears, start, required current is far less than under the same power and directly drives wheel hub motor when climbing and bearing great load, be particularly suitable for and require that the overload capacity is big and need frequent occasions such as start/parking. The hub is an eccentric hub, the hub comprises a rim and a spoke connected with the inner wall of the rim, a shaft hole is formed in the middle of the spoke, a cylindrical output shaft is connected with the shaft hole, the spoke is close to one side edge of the rim, an accommodating cavity is formed between the spoke and the rim, the speed reducing motor is partially positioned in the accommodating cavity, the ratio of the axial projection area of the speed reducing motor to the axial projection area of the rim is 0.78-1.21, the embodiment is preferably 1.08, at least 54.9% -70.1% of the axial projection of the speed reducing motor coincides with the axial projection of the rim, and the embodiment is preferably 62.3%. Adopt the structure of above-mentioned parameter can guarantee that this in-wheel motor's focus is located wheel hub's axial projection middle part, guaranteed the stability of electric motor car driving process, help reducing in-wheel motor's axial length simultaneously and be convenient for packing and transportation, the most crucial is that its axial length is the same basically with the external rotor in-wheel motor among the prior art, current electric motor car that adopts external rotor in-wheel motor can directly exchange the utility model provides an inner rotor in-wheel motor, to whole car producer, saved the adaptation and the research and development process of electric motor car back chain stay, can adopt this inner rotor in-wheel motor to same electric motor car frame can adopt traditional external rotor in-wheel motor again, and the consumer can carry out the rational selection to daily in service condition. The rim can also protect the speed reducing motor from being damaged by external collision, scratch and the like as far as possible, the structure maximally ensures the reasonable optimization of the motor weight and the motor torque output, and is the optimal scheme for ensuring that the climbing capability of the electric two-wheeled vehicle is not reduced after the electric two-wheeled vehicle is lightened; the structure of the eccentric wheel hub enables eddy current generated when the eccentric wheel hub rotates to flow through the peripheral surface of the speed reducing motor along the axial direction, so that the heat dissipation performance of the speed reducing motor is improved, and the speed reducing motor is ensured to be in an optimal working condition transition state.
According to the utility model provides an electric two wheeler compares with prior art and has following advantage: firstly, the utility model adopts the above structure not only changes the traditional external rotor driving form of the hub motor into the internal rotor driving form, but also realizes the conversion of the high-speed small torque of the motor body into the low-speed large torque of the hub by the additional holding of the speed reducing mechanism, improves the output torque of the hub motor, promotes the climbing capability of the electric two-wheel vehicle, and reduces the temperature rise of the hub motor under the large load working condition; secondly, the motor and the speed reducing mechanism are placed on the inner side of the hub through the reasonable layout of the structure, the space occupation ratio of the motor body and the speed reducing mechanism is reduced, the rear bottom fork of the electric two-wheeled vehicle can be connected and assembled through the supporting shaft, the direct exchange with the existing hub motor is realized, the frame does not need to be reformed, and the assembly universality is strong; and the shell of the motor is not connected with the hub, so that the heat dissipation performance of the motor is better, and the service life of the motor is longer.
Drawings
Fig. 1 is the axial sectional view of the inner rotor hub motor of the present invention.
Fig. 2 is the structure exploded view of the inner rotor hub motor of the present invention.
Fig. 3 is the assembly structure diagram of the cylinder-type rotating shaft and the speed reducing mechanism in the inner rotor hub motor of the utility model.
Fig. 4 is a first structural diagram of the inner rotor hub motor of the present invention.
Fig. 5 is a second structural diagram of the inner rotor hub motor of the present invention.
Fig. 6 is the axial projection view of the middle reduction motor and the wheel hub of the present invention.
Figure 7 is the utility model discloses wheel hub's in the inner rotor wheel hub motor structure chart.
Fig. 8 isbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A of fig. 7.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 to 8, an embodiment of an inner rotor hub motor provided by the utility model includes a gear motor 1, a hub 2 driven by the gear motor 1, and a support shaft 3 penetrating through the gear motor 1 and the hub 2; the speed reducing motor 1 comprises a shell, an inner rotor motor 4 and a speed reducing mechanism 5, wherein the inner rotor motor 4 and the speed reducing mechanism 5 are arranged in the shell; the inner rotor motor 4 comprises an outer stator 41 fixed in the shell and an inner rotor 42 arranged in the middle of the outer stator 41, wherein a cylinder type rotating shaft 43 is arranged in the middle of the inner rotor 42, and a power gear 44 is arranged on the cylinder type rotating shaft 43; the speed reducing mechanism 5 comprises a cylinder type output shaft 51 and a speed reducing gear set 53 which are arranged in the shell, one end of the cylinder type output shaft 51 extends out of the shell and is connected with the hub 2, and the other end of the cylinder type output shaft 51 is provided with an output gear 52; the reduction gear set 53 includes a drive gear 531 meshing with the power gear 44 and a driven gear 532 meshing with the output gear 52; the supporting shaft 3 is arranged in the machine shell, the cylinder type rotating shaft 43 and the cylinder type output shaft 51 in a penetrating way; the supporting shaft 3 is fixedly connected with the machine shell, and the cylinder type rotating shaft 43 and the cylinder type output shaft 51 are in running fit with the supporting shaft 3; the axial line of the support shaft 3, the axial line of the drum-type rotating shaft 43, the axial line of the drum-type output shaft 51, and the axial line of the hub 2 are superposed on a straight line. Firstly, the utility model adopts the above structure not only changes the traditional external rotor driving form of the hub motor into the internal rotor 42 driving form, but also realizes the conversion of the high-speed small torque of the motor body into the low-speed large torque of the hub 2 by the additional holding of the speed reducing mechanism 5, improves the output torque of the hub motor, promotes the climbing capability of the electric two-wheel vehicle, and reduces the temperature rise of the hub motor under the large load working condition; secondly, the motor and the speed reducing mechanism 5 are reasonably arranged through the structure, and are placed on the inner side of the hub 2, so that the space occupation ratio of the motor body and the speed reducing mechanism 5 is reduced, the rear bottom fork of the electric two-wheel vehicle can be connected and assembled through the support shaft 3, the direct exchange with the existing hub motor is realized, the frame does not need to be modified, and the assembly universality is strong; thirdly, the shell of the motor is not connected with the hub 2, so that the heat dissipation performance of the motor is better, and the service life is longer; finally, the utility model discloses an inner rotor wheel hub motor adorns at same two wheeler frame with the outer rotor wheel hub motor among the prior art, adopt the battery of same electric quantity etc, under the same test condition, the electric motor car adopts this inner rotor wheel hub motor, the motor operation is under high-speed, power density is big, efficiency platform is wide, response speed is fast, increase output torque through reduction gears, start, required current is far less than under the same power and directly drives wheel hub motor when climbing and bearing great load, be particularly suitable for and require that the overload capacity is big and need frequent occasions such as start/parking. The hub 2 is an eccentric hub, the hub 2 comprises a rim 21 and a spoke 22 connected with the inner wall of the rim 21, a shaft hole 23 is formed in the middle of the spoke 22, a drum-type output shaft 51 is connected with the shaft hole 23, the spoke 22 is close to the edge of one side of the rim 21, an accommodating cavity 24 is formed between the spoke 22 and the rim 21, the speed reduction motor is partially positioned in the accommodating cavity 24, the ratio of the axial projection area of the speed reduction motor to the axial projection area of the rim 21 is 0.78-1.21, the embodiment is preferably 1.08, at least 54.9% -70.1% of the axial projection of the speed reduction motor 1 is overlapped with the axial projection of the rim 21, and the embodiment is preferably 62.3%. Adopt the structure of above-mentioned parameter can guarantee that this in-wheel motor's focus is located wheel hub's axial projection middle part, guaranteed the stability of electric motor car driving process, help reducing in-wheel motor's axial length simultaneously and be convenient for packing and transportation, the most crucial is that its axial length is the same basically with the external rotor in-wheel motor among the prior art, current electric motor car that adopts external rotor in-wheel motor can directly exchange the utility model provides an inner rotor in-wheel motor, to whole car producer, saved the adaptation and the research and development process of electric motor car back chain stay, can adopt this inner rotor in-wheel motor to same electric motor car frame can adopt traditional external rotor in-wheel motor again, and the consumer can carry out the rational selection to daily in service condition. By adopting the parameter structure, the gravity center of the hub motor can be ensured to be positioned in the middle of the hub 2, the axial length of the hub motor is reduced, the hub motor is convenient to package and transport, the rim 21 can also protect the speed reduction motor 1 from being damaged by external collision, scratch and the like as far as possible, the reasonable optimization of the motor weight and the motor torque output is ensured to the maximum extent by the structure, and the method is the optimal scheme for ensuring that the climbing capability of the electric two-wheeled vehicle is not reduced after the electric two-wheeled vehicle is lightened; the structure of the eccentric wheel hub enables eddy current generated when the eccentric wheel hub rotates to flow through the peripheral surface of the speed reducing motor along the axial direction, so that the heat dissipation performance of the speed reducing motor is improved, and the speed reducing motor is ensured to be in an optimal working condition transition state.
Referring to fig. 1 and 3, according to the above embodiment of the present invention, the reduction gear set 53 includes a driving gear 531 and a driven gear 532 fixed together, the driving gear 531 and the driven gear 532 are concentrically disposed, the driving gear 531 is engaged with the power gear 44, and the driven gear 532 is engaged with the output gear 52; the number of teeth of the power gear 44 is smaller than that of the driving gear 531, the number of teeth of the driven gear 532 is smaller than that of the output gear 52, the number of teeth of the driving gear 531 is larger than that of the driven gear 532, and the power gear 44 and the output gear 52 are arranged concentrically; the driving gear 531 and the driven gear 532 are connected to the housing through a fixed shaft. The reduction ratio of the reduction mechanism 5 is 6.52. The reduction gear set 53 has the advantages of few parts, simple structure, low transmission loss, convenience in assembly and high reliability by adopting the structure.
Referring to fig. 1 to 3, according to the above embodiment of the present invention, a supporting seat is provided in the casing, the supporting seat is provided with a first supporting shaft hole 121, a first bearing 61 is provided between the inner wall of the drum-type rotating shaft 43 and the outer wall of the supporting shaft 3, and a second bearing 62 is provided between the outer wall of the drum-type rotating shaft 43 and the inner wall of the first supporting shaft hole 121; be equipped with second support shaft hole 131 on the casing lateral wall, cylinder output shaft 51 stretches out the casing from second support shaft hole 131 and is connected with wheel hub 2, is equipped with third bearing 63 between the inner wall of cylinder output shaft 51 and the outer wall of back shaft 3, is equipped with fourth bearing 64 between the outer wall of cylinder output shaft 51 and the inner wall of second support shaft hole 131. The plane of the first bearing 61 and the plane of the second bearing 62 are located on both sides of the stator. At least one section in the axial direction of the shaft hole 23 is a supporting part 232, and a fifth bearing 65 is arranged between the inner wall of the supporting part 232 and the outer wall of the supporting shaft 3. With the arrangement of the plurality of bearings, it is ensured that the support shaft 3 is movably assembled with the drum-type rotating shaft 43 and the drum-type output shaft 51, and it is also ensured that the drum-type rotating shaft 43 and the drum-type output shaft 51 are not subjected to the bearing pressure from the support shaft 3 in the casing, and the bearing pressure of the support shaft 3 is transmitted to the hub 2 through the fifth bearing 65. The cartridge-type rotation shaft 43 is provided with a bearing mount 431, the first bearing 61 is positioned in the bearing mount 431, and the inner diameter of the bearing mount 431 is larger than the inner diameter of the other portions of the cartridge-type rotation shaft 43.
Referring to fig. 1 to 3 and 8, according to the above embodiment of the present invention, an inner spline 231 is disposed at a section of the shaft hole 23 close to the reduction motor 1, an outer spline 511 is disposed on the cylindrical output shaft 51, and the inner spline 231 is engaged with the outer spline 511; a section of the shaft hole 23 away from the reduction motor 1 is the support portion 232. The utility model discloses ingenious shaft hole 23 with wheel hub 2 establishes to be two function sections, and supporting part 232 has realized the bearing capacity by the transfer of back shaft 3 to wheel hub 2 through fifth bearing 65 and 3 normal running fit of back shaft, and internal spline 231 cooperates with the external splines 511 on the barrel output shaft 51, has realized transmission and output of power, has broken traditional inner rotor wheel hub motor, needs set up the bias thinking including the whole cladding of motor of a shell on wheel hub 2.
Referring to fig. 1 and 3, according to the above embodiment of the present invention, a motor compartment 14 and a speed reduction compartment 15 are provided in the housing, the inner rotor motor 4 is located in the motor compartment 14, the speed reduction mechanism 5 is located in the speed reduction compartment 15, and the center lines of the motor compartment 14 and the speed reduction compartment 15 coincide with each other. The structure enables the appearance of the casing to be more regular, namely cylindrical, reduces the problems of clamping stagnation of external sundries and the casing and the hub 2, and is simultaneously beneficial to heat dissipation of the motor and the speed reducing mechanism 5.
Referring to fig. 1 and 2, according to the above-mentioned embodiment of the present invention, the casing includes a machine cabin cover 11, a sub-cabin plate 12 and a speed reduction cabin cover 13 connected together, the sub-cabin plate 12 is located between the machine cabin cover 11 and the speed reduction cabin cover 13, the machine cabin cover 11 and the sub-cabin plate 12 form the motor cabin 14, the speed reduction cabin cover 13 and the sub-cabin plate 12 form the speed reduction cabin 15, and the support shaft 3 is inserted into the machine cabin cover 11, the sub-cabin plate 12 and the speed reduction cabin cover 13. Sealing rings 7 are arranged between the bin dividing plate 12 and the speed reduction bin cover 13, so that the sealing performance of the oil pool 151 is ensured, and the leakage of lubricating oil is avoided; the machine bin cover 11, the bin dividing plate 12 and the speed reducing bin cover 13 are connected together through bolts. The casing adopts above-mentioned structure, not only ingenious separates motor storehouse 14 with speed reduction storehouse 15, divides storehouse board 12 can regard as at the casing middle part the supporting seat, the supporting seat is used for setting up second bearing 62, and the casing of being convenient for is inside to support the cylinder pivot 43 of motor, at last above-mentioned casing simple structure, convenient assembling, the accurate assembly of each spare part of being convenient for.
Referring to fig. 1 and 2, according to the above embodiment of the present invention, an oil sump 151 is formed in the space below the horizontal plane where the support shaft 3 is located in the reduction bin 15, and the reduction gear set is located in the oil sump 151; an air inlet and outlet valve 10 is arranged on the side wall of the speed reduction bin 15 above the horizontal plane of the support shaft 3. The horizontal plane refers to a horizontal plane where the support shaft 3 is located when the electric vehicle stands on a flat ground after the in-wheel motor is installed on the electric vehicle. Be equipped with lubricating oil in the oil bath 151, the setting up of oil bath 151 has guaranteed the lubricated effect of reduction gears 5 in the operation process, has improved reduction gears 5's radiating effect simultaneously, has reduced reduction gears 5's wearing and tearing. The driving gear has a plurality of teeth and large outer diameter, can be extended to the deep position at the bottom of the oil pool, and can be suspended by rotating the driving gear even if the liquid level of the lubricating oil is low, thereby ensuring the lubricating effect of the speed reducing mechanism. And the air inlet and outlet valve 10 is used for facilitating the temperature rise of lubricating oil in the use process and exhausting when the air pressure of the speed reducing bin 15 is increased or introducing air when the air pressure of the speed reducing bin 15 is reduced due to temperature reduction, so that the balance of the air pressure inside and outside the speed reducing bin 15 is ensured.
Referring to fig. 1 and 2, according to the above embodiment of the present invention, the bottom wall of the oil pool 151 is provided with an oil injection and discharge port 152, and the oil injection and discharge port 152 is provided with an oil shell bolt 153. The filling and draining of the lubricating oil in the oil sump 151 is facilitated.
Referring to fig. 1 and 2, according to the above embodiment of the present invention, an oil baffle 154 is disposed in the reduction chamber 15, and the oil baffle 154 is located between the reduction mechanism 5 and the intake/exhaust valve 10. The oil baffle plate can prevent lubricating oil from splashing and throwing to the air inlet and outlet valve 10 in the rotation process of the gear of the speed reducing mechanism 5 to influence the air inlet and outlet functions.
Referring to fig. 1, 2 and 5, according to the above embodiment of the present invention, the supporting shaft 3 is further provided with the rotation stopping piece 8, the supporting shaft 3 is provided with the rotation stopping section 31, the rotation stopping section 31 is in rotation stopping fit with the rotation stopping piece 8, and the rotation stopping piece 8 is fixedly connected with the housing. The rotation stopping matching means that the two parts cannot rotate relatively by adopting clamping or in a limiting or fixing mode. In order to avoid the rotation of the casing along with the rotation of the rotor or the speed reducing mechanism 5, the casing and the supporting shaft 3 need to be fixed, the rotation stopping structure is adopted to indirectly fix the casing and the supporting shaft 3, and the assembly is convenient and the fixation is firm.
Referring to fig. 2, according to the above embodiment of the present invention, the rotation stopping sheet 8 has a rotation stopping hole 81 in the middle, the rotation stopping section 31 is inserted into the rotation stopping hole 81 and is in rotation stopping fit with the rotation stopping hole 81, and the longitudinal section of the rotation stopping section 31 is any one of square, kidney-shaped and bow-shaped; the rotation stopping hole 81 is any one of a square hole, a waist-shaped hole and an arch-shaped hole. The rotation stopping sheet 8 is fixedly connected with the shell by screws. The longitudinal section of the rotation stopping section 31 is preferably designed to be waist-shaped, the rotation stopping hole 81 is designed to be a waist-shaped hole, and a certain section of the support shaft 3 is processed to be a waist-shaped section, so that the rotation stopping structure is easy to process, the strength of the support shaft 3 is basically not damaged, the rotation stopping structure is set, and the strength of the support shaft 3 is guaranteed.
Referring to fig. 1, according to the above embodiment of the present invention, an oil-proof sealing ring 94 is disposed between the outer wall of the cylindrical rotating shaft 43 and the inner wall of the first supporting shaft hole 121, a first waterproof sealing ring 91 is disposed between the inner wall of the cylindrical rotating shaft 43 and the outer wall of the supporting shaft 3, and a radial plane where the first waterproof sealing ring 91 is located between the first bearing 61 and the second bearing 62; a second waterproof sealing ring 92 is arranged between the inner wall of the second supporting shaft hole 131 and the outer wall of the cylinder type output shaft 51; and a third watertight sealing ring 93 is arranged between the inner wall of the cylinder output shaft 51 and the outer wall of the support shaft 3, and the radial plane where the third watertight sealing ring 93 is located at one end, close to the hub 2, of the cylinder output shaft 51. The utility model adopts the above structure make do not have the normal running fit's between one side of casing and the back shaft 3 condition, consequently only need carry out water repellent to one side of cylinder output shaft 51 output casing, adopt above-mentioned second waterproof sealing ring 92 to carry out water repellent to cylinder output shaft 51's outside gap simultaneously, adopt third waterproof sealing ring 93 to carry out water repellent to cylinder output shaft 51's inboard gap, adopt first waterproof sealing ring 91 to carry out water repellent to the inboard gap of cylinder pivot 43, moreover, the steam generator is simple in structure, and the water-proof effects is good. Grease proofing sealing washer 94's setting can avoid the lubricating oil in the speed reduction storehouse 15 to enter into motor storehouse 14 through the gap between cylinder pivot 43 and first support shaft hole 121 in, improved the utility model discloses a reliability.
According to the utility model provides an electric two wheeler embodiment, including the frame, establish group battery on the frame, establish the front wheel on the frame and establish the rear wheel on the frame, the rear wheel includes in-wheel motor and establishes the tire on in-wheel motor, in-wheel motor be above-mentioned embodiment inner rotor in-wheel motor. Firstly, the utility model adopts the above structure not only changes the traditional external rotor driving form of the hub motor into the internal rotor 42 driving form, but also realizes the conversion of the high-speed small torque of the motor body into the low-speed large torque of the hub 2 by the additional holding of the speed reducing mechanism 5, improves the output torque of the hub motor, promotes the climbing capability of the electric two-wheel vehicle, and reduces the temperature rise of the hub motor under the large load working condition; secondly, the motor and the speed reducing mechanism 5 are reasonably arranged through the structure, and are placed on the inner side of the hub 2, so that the space occupation ratio of the motor body and the speed reducing mechanism 5 is reduced, the rear bottom fork of the electric two-wheel vehicle can be connected and assembled through the support shaft 3, the direct exchange with the existing hub motor is realized, the frame does not need to be modified, and the assembly universality is strong; thirdly, the shell of the motor is not connected with the hub 2, so that the heat dissipation performance of the motor is better, and the service life is longer; finally, the inner rotor hub motor of the utility model and the outer rotor hub motor in the prior art are arranged on the same two-wheel vehicle frame, and the storage battery with the same electric quantity is adopted, so that the inner rotor hub motor is used in regions with more slopes; install the utility model discloses inner rotor in-wheel motor's two wheeler climbing is efficient, also makes the continuation of the journey mileage of this two wheeler far more than the two wheeler that climbing efficiency is low simultaneously.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the invention.
The technical solution provided by the present invention is described in detail above, and the principle and the implementation of the present invention are explained by applying specific examples, and the description of the above examples is only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (14)
1. An inner rotor hub motor comprises a speed reducing motor, a hub driven by the speed reducing motor and a support shaft penetrating through the speed reducing motor and the hub;
the speed reducing motor comprises a shell, an inner rotor motor and a speed reducing mechanism, wherein the inner rotor motor and the speed reducing mechanism are arranged in the shell;
the inner rotor motor comprises an outer stator fixed in the shell and an inner rotor arranged in the middle of the outer stator, wherein a cylinder type rotating shaft is arranged in the middle of the inner rotor, and a power gear is arranged on the cylinder type rotating shaft;
the speed reducing mechanism is characterized by comprising a cylinder type output shaft and a speed reducing gear set which are arranged in a shell, wherein one end of the cylinder type output shaft extends out of the shell and is connected with a hub, and the other end of the cylinder type output shaft is provided with an output gear; the reduction gear set comprises a driving gear meshed with the power gear and a driven gear meshed with the output gear;
the support shaft penetrates through the shell, the cylinder type rotating shaft and the cylinder type output shaft;
the supporting shaft is fixedly connected with the shell, and the cylinder type rotating shaft and the cylinder type output shaft are in running fit with the supporting shaft;
the axial lead of the supporting shaft, the axial lead of the barrel type rotating shaft, the axial lead of the barrel type output shaft and the axial lead of the wheel hub are superposed on a straight line;
the hub is an eccentric hub, the hub comprises a rim and a spoke connected with the inner wall of the rim, a shaft hole is formed in the middle of the spoke, a cylindrical output shaft is connected with the shaft hole, the spoke is close to one side edge of the rim, an accommodating cavity is formed between the spoke and the rim, the speed reducing motor is partially positioned in the accommodating cavity, the ratio of the axial projection area of the speed reducing motor to the axial projection area of the rim is 0.78-1.21, and at least 54.9% -70.1% of the axial projection of the speed reducing motor coincides with the axial projection of the rim.
2. The inner rotor hub motor of claim 1, wherein the reduction gear set includes a drive gear and a driven gear secured together, the drive gear and the driven gear being concentrically disposed, the drive gear being engaged with the power gear and the driven gear being engaged with the output gear; the number of teeth of the power gear is smaller than that of the driving gear, the number of teeth of the driven gear is smaller than that of the output gear, the number of teeth of the driving gear is larger than that of the driven gear, and the power gear and the output gear are arranged concentrically.
3. The inner rotor hub motor of claim 1, wherein the housing has a support base with a first support shaft hole, a first bearing is disposed between the inner wall of the cylindrical shaft and the outer wall of the support shaft, and a second bearing is disposed between the outer wall of the cylindrical shaft and the inner wall of the first support shaft hole; the shell side wall is provided with a second supporting shaft hole, the cylinder type output shaft extends out of the shell from the second supporting shaft hole and is connected with the wheel hub, a third bearing is arranged between the inner wall of the cylinder type output shaft and the outer wall of the supporting shaft, and a fourth bearing is arranged between the outer wall of the cylinder type output shaft and the inner wall of the second supporting shaft hole.
4. The inner rotor hub motor of claim 1, wherein at least one section of the axial hole is a support portion, and a fifth bearing is provided between an inner wall of the support portion and an outer wall of the support shaft.
5. The inner rotor hub motor of claim 4, wherein the shaft hole has an internal spline at a section thereof adjacent to the reduction motor, and the cylindrical output shaft has an external spline, the internal spline engaging with the external spline; and one section of the shaft hole, which is far away from the speed reducing motor, is the supporting part.
6. The inner rotor hub motor of claim 1, wherein the housing has a motor compartment and a reduction compartment, the inner rotor motor is disposed in the motor compartment, the reduction mechanism is disposed in the reduction compartment, and the center lines of the motor compartment and the reduction compartment are coincident.
7. The inner rotor hub motor of claim 6, wherein the housing includes a housing cover, a dividing plate and a decelerating cover, the dividing plate is disposed between the housing cover and the decelerating cover, the motor housing is formed between the housing cover and the dividing plate, the decelerating chamber is formed between the decelerating cover and the dividing plate, and the supporting shaft is disposed through the housing cover, the dividing plate and the decelerating cover.
8. The inner rotor hub motor of claim 6, wherein an oil sump is formed in a space below a horizontal plane of the support shaft in the reduction gear housing, and the reduction gear set is located in the oil sump; and an air inlet and outlet valve is arranged on the side wall of the deceleration bin above the horizontal plane where the supporting shaft is positioned.
9. The inner rotor hub motor of claim 8, wherein the oil sump bottom wall is provided with an oil drain port, and the oil drain port is provided with an oil shell bolt.
10. The inner rotor hub motor of claim 8, wherein the reduction chamber has an oil baffle plate disposed between the reduction mechanism and the inlet/outlet valve.
11. The inner rotor hub motor of claim 1, wherein the support shaft further comprises a rotation stop piece, the support shaft further comprises a rotation stop section, the rotation stop section is engaged with the rotation stop piece, and the rotation stop piece is fixedly connected to the housing.
12. The inner rotor hub motor of claim 11, wherein the rotation stopping piece has a rotation stopping hole at the middle portion, the rotation stopping section is inserted into the rotation stopping hole and is engaged with the rotation stopping Kong Zhizhuai, and the longitudinal section of the rotation stopping section is any one of square, kidney and arc; the rotation stopping hole is any one of a square hole, a waist-shaped hole and an arched hole.
13. The inner rotor hub motor of claim 3, wherein an oil-proof seal ring is disposed between the outer wall of the cylindrical rotating shaft and the inner wall of the first supporting shaft hole, a first water-proof seal ring is disposed between the inner wall of the cylindrical rotating shaft and the outer wall of the supporting shaft, and a radial plane on which the first water-proof seal ring is disposed is located between the first bearing and the second bearing; a second waterproof sealing ring is arranged between the inner wall of the second support shaft hole and the outer wall of the cylindrical output shaft; and a third waterproof sealing ring is arranged between the inner wall of the cylinder output shaft and the outer wall of the supporting shaft, and the radial plane where the third waterproof sealing ring is located at one end, close to the hub, of the cylinder output shaft.
14. An electric two-wheeled vehicle comprising a frame, a battery pack provided on the frame, a front wheel provided on the frame, and a rear wheel provided on the frame, the rear wheel including a hub motor and a tire provided on the hub motor, characterized in that the hub motor is the inner rotor hub motor according to any one of claims 1 to 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222169910.5U CN217994709U (en) | 2022-08-17 | 2022-08-17 | Inner rotor hub motor and electric two-wheel vehicle using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222169910.5U CN217994709U (en) | 2022-08-17 | 2022-08-17 | Inner rotor hub motor and electric two-wheel vehicle using same |
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| Publication Number | Publication Date |
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| CN217994709U true CN217994709U (en) | 2022-12-09 |
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| CN202222169910.5U Active CN217994709U (en) | 2022-08-17 | 2022-08-17 | Inner rotor hub motor and electric two-wheel vehicle using same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022103634A1 (en) | 2022-02-16 | 2023-08-17 | Porsche Ebike Performance Gmbh | Driving device for an electric bicycle and electric bicycle |
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2022
- 2022-08-17 CN CN202222169910.5U patent/CN217994709U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022103634A1 (en) | 2022-02-16 | 2023-08-17 | Porsche Ebike Performance Gmbh | Driving device for an electric bicycle and electric bicycle |
| DE102022103634B4 (en) | 2022-02-16 | 2024-05-29 | Porsche Ebike Performance Gmbh | Drive device for an electric bicycle and electric bicycle |
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