CN114670617A - Three-gear variable-speed hub motor power assembly with large torque - Google Patents

Three-gear variable-speed hub motor power assembly with large torque Download PDF

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Publication number
CN114670617A
CN114670617A CN202210419999.8A CN202210419999A CN114670617A CN 114670617 A CN114670617 A CN 114670617A CN 202210419999 A CN202210419999 A CN 202210419999A CN 114670617 A CN114670617 A CN 114670617A
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China
Prior art keywords
gear
brake
planet
motor
revolute pair
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CN202210419999.8A
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Chinese (zh)
Inventor
陈奇
黄丽源
石若潼
郭涛
黄德
尹延国
吴焱明
张彦
宋晖
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Hefei University of Technology
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Hefei University of Technology
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Priority to CN202210419999.8A priority Critical patent/CN114670617A/en
Publication of CN114670617A publication Critical patent/CN114670617A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
    • B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
    • B60K17/08—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K2007/0092—Disposition of motor in, or adjacent to, traction wheel the motor axle being coaxial to the wheel axle

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Retarders (AREA)

Abstract

The invention discloses a high-torque three-gear variable-speed hub motor power assembly which is characterized by comprising a motor, a left planetary gear train, a right planetary gear train, a first brake, a second brake, a third brake and a hub, wherein the first brake and the second brake are fixedly connected to the inner wall of a case, the third brake is fixedly connected to a motor shaft, and the three brakes are matched with each other to realize a gear switching function. The invention can meet three forward gears, namely a neutral gear and a parking gear, wherein the three forward gears comprise a high-torque gear; meanwhile, the gear shifting mechanism has the characteristics of compact structure, simple gear shifting mode, high transmission efficiency, low assembly precision requirement and the like, provides a new scheme reference for the transmission structure of the conventional hub motor of the heavy-duty electric vehicle, and has good use value and application prospect.

Description

Three-gear variable-speed hub motor power assembly with large torque
Technical Field
The invention belongs to the field of hub motors of electric vehicles, and particularly relates to a power assembly of a high-torque three-gear hub motor.
Background
The hub motor plays a vital role in a plurality of electric vehicles, and mainly integrates a power device and a transmission device into a wheel, so that a power system of the electric vehicle is greatly simplified, the power of the motor is directly transmitted to the wheel, and the loss caused by mechanical transmission is reduced. In the aspect of the heavy-duty electric vehicle, China is also in a vigorous development stage, and the hub motor used by the heavy-duty vehicle has stricter requirements on output torque, not only can stably output the torque, but also has certain climbing capacity. In addition, the service environment of the truck is much more severe than that of a common electric vehicle, a large part of the truck has large gradient fluctuation in remote areas or mountain areas, and some trucks even have no pavement. Secondly, the truck has heavy self-weight and large cargo capacity, and large inertia needs to be overcome during starting and stopping, and if large torque output does not exist, the truck cannot be started quickly. Thirdly, the trucks are not loaded all the time, the torque demand is not so strong during the non-loading period, and if the trucks are controlled by only one speed, the electric energy is wasted and the driving safety problem also exists.
In the above reasons, the speed change performance and the large torque output performance of the truck hub motor are very important. Considering that the transmission ratio of the planetary gear train is simple to adjust and the gear shifting is convenient, the hub motor is combined with the planetary gear train, and a three-gear variable-speed hub motor containing the planetary gear train and a brake and having large torque can be designed to solve the problems.
Patent CN 109130837 a discloses a low-speed large-torque electric wheel device, which is characterized by comprising a hub motor, a first planetary gear row and a second planetary gear row. The invention reduces the speed and increases the torque of the power output by the hub motor through the speed reduction and torque increase of the two-stage planetary gear speed reducing mechanism, so that the hub end of the wheel can achieve the effect of low speed and large torque, and the dynamic property of the electric wheel driven automobile is improved. However, the structure of the electric vehicle has no speed change function, the speed and the torque cannot be obtained simultaneously, and the changeable torque output requirement of the electric vehicle with the load cannot be met.
Patent CN 108075603 a discloses an in-wheel motor, characterized in that: the utility model provides a novel variable speed wheel hub motor, provides and has solved and realize double dynamical variable speed and the radiating scheme of forced air cooling under great wheel hub motor power, can be used to the power great electric power bicycle single wheel drive that carries cargo, also is applicable to the power great pure electric motorcycle car. However, the speed change is only manual, hydraulic reliability is not available, the structure is only suitable for electric bicycles or electric motorcycles, and the practicability in the field of electric automobiles is not high.
Patent CN108242866A discloses an in-wheel motor adopting two-stage planetary gear, which has a first-stage planetary gear reduction mechanism and a second-stage planetary gear reduction mechanism, and increases the reduction ratio, and increases the output torque of the motor, thereby increasing the efficiency platform of the motor, adapting to different road conditions and having stronger driving force. However, the characteristic of flexible transmission ratio conversion of the planetary gear train is not fully utilized, the characteristic of no speed change is utilized, the practicability is poor, the increased torque is small, and the planetary gear train is not suitable for the condition of heavy torque requirement of a truck.
The existing hub motor is mostly driven by a single-stage gear with a single reduction ratio, the output torque is not considered for the lorry to the maximum extent, the complex and changeable power requirements of the electric truck are difficult to meet, and better motor efficiency cannot be exerted on non-bearing road surfaces and large-slope slopes. Therefore, after the factors are fully considered, the planetary gear train and the brake are fully fused, the transmission gear of the hub motor is increased, and the power requirement of the load-carrying electric vehicle on running under different road conditions is better met.
Disclosure of Invention
The wheel hub motor power unit aims at the problems that the existing wheel hub motor power unit of the electric vehicle is single in output transmission ratio and does not have large torque output capacity, the motor cannot be enabled to keep high-efficiency operation under the more extreme condition, and the complicated and changeable operation requirements cannot be met. The invention utilizes two planetary gear trains and three brakes to realize three-gear output of the motor, so that the motor has three variable transmission ratios, including a high-torque output transmission ratio. The gear shifting operation is simple and convenient, the transmission is stable, and a reliable, novel and multifunctional technical improvement is provided for the hub motor of the load-carrying electric vehicle.
The invention adopts the following technical scheme for realizing the purpose:
the invention relates to a three-gear variable-speed hub motor power assembly with large torque, which is characterized in that: the three-gear variable-speed hub motor consists of a gear transmission module, a gear shifting module and a power module; the utility model provides a three grades of wheel hub motors that contain three braker includes that the part has the motor shaft, the bearing end cover, motor stator, left side sun gear, left side planet wheel, left side planet carrier, the ring gear, wheel hub, the first planet wheel in right side, right side second planet wheel, right side third planet wheel, right side planet carrier, right side sun gear, the sealing washer, the shell, motor rotor, first stopper, the second stopper, the third stopper, first stopper oil circuit, the second stopper oil circuit, the third stopper oil circuit.
The gear transmission module comprises a motor shaft, a left sun gear, a left planet carrier, a gear ring, a right first planet gear, a right second planet gear, a right third planet gear, a right planet carrier and a right sun gear; the left end of the motor shaft and the shell form a revolute pair and are provided with bearings, the bearing end covers are matched with the revolute pair, and the right end of the motor shaft and the right side planet carrier form a revolute pair and are provided with bearings; the left sun gear is externally meshed with the left planet gear and is connected with the motor rotor through a key; the left planet gear is internally meshed with the gear ring, and simultaneously forms a revolute pair with the left planet carrier, and a bearing is arranged between the left planet gear and the gear ring; the right sun gear is externally meshed with the right first planet gear, is connected with the motor shaft through a key and is tightly leaned against the shaft shoulder of the motor shaft, and axial positioning is completed; the right first planet wheel is externally meshed with the right second planet wheel, and simultaneously forms a revolute pair with the right planet carrier, and a bearing is arranged between the revolute pair and the right planet carrier; the right second planet wheel is externally meshed with the right third planet wheel, and simultaneously forms a revolute pair with the right planet carrier, and a bearing is arranged between the revolute pair and the right third planet wheel; the right third planet gear is internally meshed with the gear ring, forms a revolute pair with the right planet carrier at the same time, and is provided with a bearing; the right side planet carrier with wheel hub passes through the screw solid and allies oneself with, forms the revolute pair and is equipped with the sealing washer simultaneously between with the shell.
The gear shifting module comprises a first brake, a second brake, a third brake, a first brake oil path, a second brake oil path and a third brake oil path; the gear ring of the first brake is fixedly connected with the outer side of the gear ring, and the outer ring of the first brake is fixedly connected with the shell; the second brake gear ring is fixedly connected with the left planet carrier, and the second brake outer ring is fixedly connected with the shell; the third brake gear ring is fixedly connected with the motor shaft, and the outer ring of the third brake is fixedly connected with the part of the gear ring extending inwards; the first brake oil path is positioned in the motor shaft and provides hydraulic oil for the first brake; the second brake oil path is positioned in the motor shaft and provides hydraulic oil for the second brake; the third brake oil path is positioned in the motor shaft and provides hydraulic oil for the third brake;
the power module comprises a motor stator and a motor rotor; the motor stator is fixedly connected with the shell; and the motor rotor is fixedly connected with a motor shaft and is connected with the left sun gear through a key.
The first brake oil path, the second brake oil path and the third brake oil path are hidden in the motor shaft and the shell, and no oil path is required to be arranged additionally.
The motor stator is in close contact with the shell, so that heat dissipation is facilitated.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts the layout of one motor, two groups of planetary gear trains and three brakes, and has the advantages of convenient gear shifting operation, safety and reliability. The three brakes are mutually matched, so that the flexible conversion of a neutral gear, a parking gear and a three-speed driving gear can be realized, torques of different levels can be output, and the three brakes can adapt to complex road condition scenes of the load-carrying electric vehicle.
2. The invention adopts the wet-type multi-disc brake to carry out gear shifting control, adopts a hydraulic control scheme, and has the characteristics of safety, reliability, large braking force, light weight and the like. The hydraulic oil circuit is hidden in the hub motor shell and the motor shaft, the hydraulic gear switching device has the characteristic of space saving, and different brakes are matched with each other to realize switching of different gears.
3. The invention adopts an unconventionally arranged planetary gear train, and the planetary gear adopts a helical gear. The connecting line of the central points of the planet gears is not a straight line and does not pass through the central point of the sun gear, so that the volume of the planetary gear train can be greatly compressed, the length of the planet carrier can be shortened, and the bending moment resistance of the planet carrier can be improved. The planetary gear train has the advantages of small transverse occupied space, large bearing capacity, good stability and the like, can meet the design requirements of different driving road conditions, and has strong adaptability.
4. The invention adopts the structure that the motor stator is tightly contacted with the shell, and the motor stator is far away from the center of the power assembly to a great extent, so that the heat dissipation performance of the motor stator is greatly improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a D1 gear transmission route diagram of the present invention;
FIG. 3 is a D2 gear transmission route diagram of the present invention;
FIG. 4 is a D3 gear transmission route diagram of the present invention;
FIG. 5 is a cross-sectional view of the oil circuit of the present invention;
FIG. 6 is a right planetary gear train layout of the present invention;
wherein: 1 motor shaft, 2 bearing end covers, 3 motor stators, 4 left sun gears, 5 left planet gears, 6 left planet carriers, 7 gear rings, 8 hubs, 9 right first planet gears, 10 right second planet gears, 11 right third planet gears, 12 right planet carriers, 13 right sun gears, 14 sealing rings, 15 shells, 16 motor rotors, B1First brake, B2Second brake, B3Third brake, W1First brake oil passage, W2Second brake oil passage, W3And a third brake oil passage.
Detailed Description
The invention is further explained by the embodiment with the attached drawings, and the power assembly of the three-gear speed-changing hub motor with large torque is further explained.
Referring to fig. 1, the invention is characterized by mainly comprising a motor shaft 1, a bearing end cover 2, a motor stator 3, a left sun gear 4, a left planet gear 5, a left planet carrier 6, a gear ring 7, a hub 8, a right first planet gear 9, a right second planet gear 10, a right third planet gear 11, a right planet carrier 12, a right sun gear 13, a sealing ring 14, a shell 15, a motor rotor 16 and a first brake B1Second brake B2Third brake B3First brake oil path W1Second brake oil path W2Third brake oil path W3。
The gear transmission module comprises a motor shaft 1, a left sun gear 4, a left planet gear 5, a left planet carrier 6, a gear ring 7, a right first planet gear 9, a right second planet gear 10, a right third planet gear 11, a right planet carrier 12 and a right sun gear 13; the left end of the motor shaft 1 and the shell 15 form a revolute pair and are provided with bearings, the bearing end cover 2 is matched with the revolute pair, and the right end of the motor shaft and the right side planet carrier 12 form a revolute pair and are provided with bearings; the left sun gear 4 is externally meshed with the left planet gear 5 and is connected with the motor rotor 16 through a key; the left planet wheel 5 is internally meshed with the gear ring 7, and simultaneously forms a revolute pair with the left planet carrier 6, and a bearing is arranged between the revolute pair and the left planet carrier; what is needed isThe right sun gear 13 is externally meshed with the right first planet gear 11, is connected with the motor shaft 1 through a key and is tightly leaned against the shaft shoulder of the motor shaft 1, and axial positioning is completed; the right first planet wheel 11 is externally meshed with the right second planet wheel 10, and simultaneously forms a revolute pair with the right planet carrier 12, and a bearing is arranged between the revolute pair and the right second planet wheel; the right second planet gear 10 is externally meshed with the right third planet gear 9, and forms a revolute pair with the right planet carrier 12, and a bearing is arranged between the revolute pair and the right third planet gear; the right third planet gear 9 is internally meshed with the gear ring 8, and simultaneously forms a revolute pair with the right planet carrier 12, and a bearing is arranged between the revolute pair and the right planet carrier; the right planet carrier 12 is fixedly connected with the hub 8 through screws, and a revolute pair and a sealing ring 14 are formed between the right planet carrier and the shell 15. The gear shift module comprises a first brake B1A second brake B2A third brake B3First brake oil path W1Second brake oil path W2And a third brake oil path W3(ii) a The first brake B1The gear ring is fixedly connected with the outer side of the gear ring 7, and the first brake B1The outer ring of the housing is fixedly connected with the housing 15; the second brake B2The gear ring is fixedly connected with the left planet carrier 6, and the second brake B2The outer ring is fixedly connected with the shell 15; the third brake B3The gear ring is fixedly connected with the motor shaft 1, and the third brake B3The outer ring is fixedly connected with the inward extending part of the gear ring 7; the first brake oil path W1Is positioned inside the motor shaft 1 and is the first brake B1Providing hydraulic oil; the second brake oil path W2Is positioned inside the motor shaft 1 and is the second brake B2Providing hydraulic oil; the third brake oil path W3Is positioned inside the motor shaft 1 and is the third brake B3Providing hydraulic oil; the power module comprises a motor stator 3 and a motor rotor 16; the motor stator 3 is fixedly connected with the shell 15; the motor rotor 16 is fixedly connected with the motor shaft 1 and is connected with the left sun gear 4 through a key.
As shown in FIG. 5, the present invention is characterized in that the oil paths of three brakes are integrated outside the motor shaft 1Inside the casing, three oil paths do not interfere with each other, W1The oil circuit is a first brake B1Supply of oil, W2The oil path is a second brake B2Supply of oil, W3The oil path is a third brake B3And (5) oil supply.
Referring to fig. 6, the present invention is characterized in that the planetary gear train is arranged in a non-conventional manner, and the left planetary gear train of fig. 1-4 has a gear ring 7, a right first planetary gear 9, a right second planetary gear 10, a right third planetary gear 11 and a right sun gear 13 arranged in a staggered manner, so that the longitudinal dimension of the planetary gear train is greatly reduced, and the bending moment resistance of the planetary gear train is greatly improved due to the shortening of the planetary carrier.
The working principle of the invention is explained as follows:
according to the speed per hour requirement of the existing electric vehicle and the requirement of gear shifting of the electric vehicle by combining special road conditions, the number of teeth of the designed gear is shown in table 1.
TABLE 1 Gear teeth number table
Figure BDA0003606470680000051
As shown in fig. 1, the shifting module of the powertrain of the present embodiment uses three brakes for a three-speed hub motor with high torque. The actuators for the respective gears are shown in table 2.
TABLE 2 Shift actuator Enforcement Table
Figure BDA0003606470680000052
Note: in the table, "●" indicates binding and ". smallcircle" indicates separation;
with reference to fig. 1, fig. 2 and table 2, the transmission routes of the gears are described as follows:
(1) parking gear (P gear)
As shown in fig. 1, when the first brake B1A second brake B2And a third brake B3When the inner and outer friction plates are jointed, the whole wheel train is locked, the tyre can not rotate,the parking function is achieved.
(2) Neutral gear (N gear)
As shown in fig. 1, when the first brake B1A second brake B2And a third brake B3When the inner and outer friction plates are kept separated, the two planetary gear trains are changed into two differential gear trains, and the wheels are not controlled by driving force and enter a neutral gear state.
(3) Advancing first gear (D1 gear)
As shown in fig. 2, when the first brake B1The inner and outer ring friction plates are kept combined, and a second brake B2And a third brake B3While remaining disengaged, the left-hand planet carrier 6 remains stationary relative to the housing 15. At the moment, the left planetary gear train and the right planetary gear train both participate in power output. The left planetary gear train mainly functions to transmit power acted and transmitted by the motor stator 3 and the motor rotor 16 to the gear ring 7 through the left sun gear 4 and the left planet gear 5. The right planetary gear train mainly has the function of combining the power transmitted to the gear ring 7 by the left planetary gear train, transmitting the power directly transmitted by the action of the motor stator 3 and the motor rotor 16 to the right planetary gear train 12 through the motor shaft 1, the right sun gear 13, the right first planetary gear 11, the right second planetary gear 10 and the right third planetary gear 9, and further outputting the power to the hub 8 to drive the automobile to advance at the transmission ratio of 10.
(4) Second forward (D2 gear)
When the second brake B is shown in FIG. 32The inner and outer friction plates of the first brake B1And a third brake B3While remaining disengaged, the ring gear 7 remains stationary relative to the housing 15. At the moment, only the right planetary gear train participates in power transmission. The left sun gear 4, the left planet gear 5 and the left planet carrier 6 are in an idle state and do not participate in power transmission. The motor stator 3 and the motor rotor 16 act to output power to the motor shaft 1, and then the power is transmitted to the right planet carrier 12 through the right sun gear 13, the right first planet gear 11, the right second planet gear 10 and the right third planet gear 9, and then the power is output to the hub 8, so that the automobile is driven to advance at the transmission ratio of 3.
(5) Three forward gears (D3 gear)
As shown in fig. 4, when the third brake B3The inner and outer friction plates of the first brake B1And a second brake B2While remaining separate. At the moment, the gear ring 7 and the motor shaft 1 keep relatively static, namely the planetary gear train can be regarded as a fixed whole, the left sun gear 4, the left planet gear 5, the left planet carrier 6, the right first planet gear 11, the right second planet gear 10 and the right third planet gear 9 are kept relatively static, the right sun gear 13 and the shell 15 are kept relatively static, power acted by the motor stator 3 and the motor rotor 16 is directly output to the right planet carrier 12, and then the power is output to the hub 8 to drive the automobile to move forward at the transmission ratio of 1.

Claims (6)

1. The utility model provides a three grades of variable speed in-wheel motor power assemblies that contain big moment of torsion which characterized in that: the three-gear variable-speed hub motor consists of a gear transmission module, a gear shifting module and a power module; the utility model provides a three grades of wheel hub motors that contain three brakers has motor shaft (1) including the part, bearing end cover (2), motor stator (3), left side sun gear (4), left side planet wheel (5), left side planet carrier (6), ring gear (7), wheel hub (8), first planet wheel (9) in right side, right side second planet wheel (10), right side third planet wheel (11), right side planet carrier (12), right side sun gear (13), sealing washer (14), shell (15), motor rotor (16), first stopper (B)1) Second brake (B)2) Third brake (B)3) First brake oil path (W)1) Second brake oil path (W)2) Third brake fluid path (W)3)。
2. The high-torque three-speed variable-speed hub motor power assembly as claimed in claim 1, wherein: the gear transmission module comprises a motor shaft (1), a left sun gear (4), a left planet gear (5), a left planet carrier (6), a gear ring (7), a right first planet gear (9), a right second planet gear (10), a right third planet gear (11), a right planet carrier (12) and a right sun gear (13); the left end of the motor shaft (1) and the shell (15) form a revolute pair and are provided with bearings, the bearing end covers (2) are matched with the revolute pair, and the right end of the motor shaft and the right side planet carrier (12) form a revolute pair and are provided with bearings; the left sun gear (4) is externally meshed with the left planet gear (5) and is connected with the motor rotor (16) through a key; the left planet wheel (5) is internally meshed with the gear ring (7), and simultaneously forms a revolute pair with the left planet carrier (6) and a bearing is arranged between the revolute pair and the left planet carrier; the right sun gear (13) is externally meshed with the right first planet gear (11), is connected with the motor shaft (1) through a key and is tightly leaned against the shaft shoulder of the motor shaft (1) to complete axial positioning; the right first planet wheel (11) is externally meshed with the right second planet wheel (10), and simultaneously forms a revolute pair with the right planet carrier (12) and a bearing is arranged between the revolute pair and the right second planet wheel; the right second planet wheel (10) is externally meshed with the right third planet wheel (9), and simultaneously forms a revolute pair with the right planet carrier (12) and a bearing is arranged between the revolute pair and the right third planet wheel; the right third planet wheel (9) is internally meshed with the gear ring (8), and simultaneously forms a revolute pair with the right planet carrier (12) and a bearing is arranged between the revolute pair and the right third planet wheel; the right side planet carrier (12) and the hub (8) are fixedly connected through screws, and meanwhile, a revolute pair is formed between the right side planet carrier and the shell (15) and a sealing ring (14) is installed.
3. The high-torque three-gear variable-speed hub motor power assembly as claimed in claim 1, wherein: the gear shift module comprises a first brake (B)1) A second brake (B)2) And a third brake (B)3) First brake oil path (W)1) And a second brake oil path (W)2) And a third brake oil path (W)3) (ii) a The first brake (B)1) The gear ring is fixedly connected with the outer side of the gear ring (7), and the first brake (B)1) The outer ring of the shell is fixedly connected with the shell (15); the second brake (B)2) The gear ring is fixedly connected with the left planet carrier (6), and the second brake (B)2) The outer ring is fixedly connected with the shell (15); the third brake (B)3) The gear ring is fixedly connected with the motor shaft (1), and the third brake (B)3) The outer ring is fixedly connected with the inward extending part of the gear ring (7); the first brake oil path (W)1) Is located inside the motor shaft (1) and is simultaneously the first brake (B)1) Providing hydraulic oil; the second brake oil path (W)2) Is located inside the motor shaft (1) and is simultaneously the second brake (B)2) Providing hydraulic oil; the third brake oil path (W)3) Is located inside the motor shaft (1) and is also the third brake (B)3) And providing hydraulic oil.
4. The high-torque three-speed variable-speed hub motor power assembly as claimed in claim 1, wherein: the power module comprises a motor stator (3) and a motor rotor (16); the motor stator (3) is fixedly connected with the shell (15); the motor rotor (16) is fixedly connected with the motor shaft (1) and is connected with the left sun gear (4) through a key.
5. The high-torque three-speed variable-speed hub motor power assembly as claimed in claim 1, wherein: the first brake oil path (W)1) Second brake oil path (W)2) And a third brake oil path (W)3) Is hidden in the motor shaft (1) and the shell (15) without arranging an oil path additionally.
6. The high-torque three-speed variable-speed hub motor power assembly as claimed in claim 1, wherein: the motor stator (3) is in close contact with the shell (15), and is far away from the center of the structure to the greatest extent, so that heat dissipation is facilitated.
CN202210419999.8A 2022-04-20 2022-04-20 Three-gear variable-speed hub motor power assembly with large torque Pending CN114670617A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210419999.8A CN114670617A (en) 2022-04-20 2022-04-20 Three-gear variable-speed hub motor power assembly with large torque

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210419999.8A CN114670617A (en) 2022-04-20 2022-04-20 Three-gear variable-speed hub motor power assembly with large torque

Publications (1)

Publication Number Publication Date
CN114670617A true CN114670617A (en) 2022-06-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210419999.8A Pending CN114670617A (en) 2022-04-20 2022-04-20 Three-gear variable-speed hub motor power assembly with large torque

Country Status (1)

Country Link
CN (1) CN114670617A (en)

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