CN115675072A - Electric drive bridge and vehicle with same - Google Patents
Electric drive bridge and vehicle with same Download PDFInfo
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- CN115675072A CN115675072A CN202211482433.6A CN202211482433A CN115675072A CN 115675072 A CN115675072 A CN 115675072A CN 202211482433 A CN202211482433 A CN 202211482433A CN 115675072 A CN115675072 A CN 115675072A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Abstract
The invention discloses an electric drive bridge and a vehicle with the same, wherein the electric drive bridge comprises: a drive shaft; a differential for transmitting power to a drive shaft; the first driving assembly and the second driving assembly respectively comprise a power part and a speed reducer transmission mechanism, and the power part is connected with the input end of the speed reducer transmission mechanism; the hollow shaft is sleeved on the peripheral portion of the driving shaft and can rotate relative to the driving shaft, a hollow shaft gear and a sun gear are fixedly arranged on the hollow shaft, the output end of a speed reducer transmission mechanism of at least one of the first driving assembly and the second driving assembly is connected with the hollow shaft gear, the sun gear is connected with the planetary gear mechanism, and the planetary gear mechanism is connected with the differential mechanism. The electric drive bridge provided by the invention can simultaneously transmit power flows of the first driving assembly and the second driving assembly to the hollow shaft, provides enough torque for the hub, meets the use requirements of different environments, and has the advantages of simple structure, convenience in maintenance and low use cost.
Description
Technical Field
The invention relates to the field of vehicle driving equipment, in particular to an electric drive axle. The invention further relates to a vehicle comprising such an electric drive axle.
Background
Due to the wide weight range of the commercial vehicle for carrying cargoes, the road conditions are various. In order to ensure the vehicle operation capacity and the operation efficiency under various working conditions, the electric drive bridge is required to obtain certain speed and traction force under different working conditions. Some two grades of speed change electric drive bridges that exist on the market, the speed ratio that its setting can obtain certain balance between speed of a motor vehicle and traction force, but because the restriction of design structure, the speed ratio range is narrower, still can appear under many operating modes, can not compromise speed of a motor vehicle and traction force. At present, the running conditions of commercial vehicles are diversified, and the requirements on the vehicle speed and the traction force are also diversified. The design of the electric drive axle system of the commercial vehicle needs to meet the requirement of diversified operating conditions of the commercial vehicle as much as possible, for example, the electric drive axle system needs large traction force when climbing a slope and can provide enough traction force; when the transportation time needs to be reduced, higher vehicle speed can be obtained, thereby increasing the transportation efficiency. The structure setting of the speed changing system, the setting of gear positions and the selection of speed ratio are fully reasonable, so that the requirements of different transportation working conditions on traction force and vehicle speed are met, and the energy consumption is reduced.
In the electric drive axle of the commercial vehicle in the prior art, a speed change system of the electric drive axle of the commercial vehicle is generally only provided with one gear and one speed ratio, and cannot meet various running working conditions of the commercial vehicle; some electric drive bridges with two-gear speed change systems have narrow speed ratio ranges due to mechanical structures, and cannot meet various running conditions of commercial vehicles; meanwhile, the existing commercial vehicle electric drive axle with the two-gear speed change system cannot ensure uninterrupted power when shifting gears due to the design structure, and can cause great risk when shifting gears under working conditions such as a ramp. Moreover, the electric drive bridge of the commercial vehicle is basically a driving form that a multistage reduction box is combined with a wheel edge planet for speed reduction, namely, the left and right wheel ends are provided with planet row structures, the wheel edge planet wheel is easy to damage at high temperature, so that the whole service life of the electric drive bridge is short, the electric drive bridge cannot be decelerated and torque-increased according to multiple gears under different working conditions, and the efficiency of the motor cannot be exerted.
However, the dual-motor drive in the prior art is generally transmitted to the differential mechanism through the same gear and then transmitted to the wheel end, so that the torque transmission effect is poor, the types of the transmission modes are few, and the diversified use requirements of the commercial vehicle cannot be met.
Therefore, how to improve the driving performance of the electric drive bridge is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide an electric drive bridge, which can effectively improve the torque transmission efficiency, realize the power flow superposition effect and meet the climbing requirement by arranging at least two groups of driving components. It is a further object of the present invention to provide a vehicle comprising an electric drive axle as described above.
In order to achieve the purpose, the invention provides the following technical scheme:
an electrically driven bridge, comprising:
the driving shaft is used for driving the hub to rotate;
a differential for transmitting power to the drive shaft, the differential being connected with the drive shaft;
the first driving assembly and the second driving assembly respectively comprise a power part and a speed reducer transmission mechanism, and the power part is connected with the input end of the speed reducer transmission mechanism;
the hollow shaft is sleeved on the periphery of the driving shaft and can rotate relative to the driving shaft, a hollow shaft gear and a sun gear are fixedly arranged on the hollow shaft, the output end of a speed reducer transmission mechanism of at least one of the first driving assembly and the second driving assembly is connected with the hollow shaft gear, the sun gear is connected with the planetary gear mechanism, and the planetary gear mechanism is connected with the differential mechanism;
the controller is used for controlling the first driving assembly and the second driving assembly to act;
and the power components of the first driving assembly and the second driving assembly transmit power to the hollow shaft gear through the respective speed reducer transmission mechanisms, the hollow shaft gear drives the hollow shaft to rotate so as to drive the sun gear to rotate, the sun gear drives the planetary gear mechanism to rotate, and the planetary gear mechanism transmits power to the differential mechanism.
Preferably, the first driving assembly comprises a first power component and a first speed reducer transmission mechanism, the second driving assembly comprises a second power component and a second speed reducer transmission mechanism, and the speed ratio of the first speed reducer transmission mechanism is different from that of the second speed reducer transmission mechanism; the controller is also used for adjusting the linear velocities of the output ends of the first speed reducer transmission mechanism and the second speed reducer transmission mechanism to be the same when the output ends of the first speed reducer transmission mechanism and the second speed reducer transmission mechanism are meshed with the hollow shaft gear.
Preferably, the device further comprises a third driving assembly, wherein the third driving assembly comprises a power component and a speed reducer transmission mechanism, and the power component is connected with the input end of the speed reducer transmission mechanism; the output end of the speed reducer transmission mechanism of at least one of the first driving assembly, the second driving assembly and the third driving assembly is connected with the hollow shaft gear.
Preferably, the planetary gear mechanism includes a carrier and an outer ring gear, an outer peripheral portion of the carrier is engaged with the outer ring gear, and the carrier drives the differential to rotate.
Preferably, the drive shaft comprises a first half shaft and a second half shaft, both of which are connected to the differential, the first half shaft being configured to drive a first hub in rotation, the second half shaft being configured to drive a second hub in rotation; the axle housing is used for fixing the driving shaft and the wheel hub.
Preferably, the transmission mechanism of the speed reducer comprises an input shaft, a middle shaft and a central shaft, the power component is connected with the input shaft, an input gear is fixedly arranged on the input shaft, a middle transmission gear, a middle high-speed gear and a middle low-speed gear are fixedly arranged on the middle shaft, a sliding sleeve is arranged on the central shaft, the sliding sleeve is circumferentially clamped with the central shaft, a central high-speed gear and a central low-speed gear are further sleeved on the central shaft, and the central shaft is rotationally connected with the central high-speed gear and the central low-speed gear; the input gear is meshed with the middle transmission gear, the middle high-speed gear is meshed with the central high-speed gear, the middle low-speed gear is meshed with the central low-speed gear, and the sliding sleeve can be connected with the central high-speed gear or the central low-speed gear in a circumferential clamping mode.
Preferably, the speed ratio of the intermediate high-speed gear and the central high-speed gear of the reducer transmission mechanism in the first drive assembly is different from the speed ratio of the intermediate high-speed gear and the central high-speed gear of the reducer transmission mechanism in the second drive assembly; the speed ratio of the intermediate low-speed gear and the central low-speed gear of the reducer transmission mechanism in the first drive assembly is different from the speed ratio of the intermediate low-speed gear and the central low-speed gear of the reducer transmission mechanism in the second drive assembly.
Preferably, the intermediate high-speed gear and the central high-speed gear, and the intermediate low-speed gear and the central low-speed gear are in constant mesh.
Preferably, the central shaft is further fixedly provided with central shaft external teeth, and the central shaft external teeth are meshed with the hollow shaft gear to realize power transmission from the speed reducer transmission mechanism to the hollow shaft.
The invention also provides a vehicle comprising an electric drive axle as described in any one of the above.
The invention provides an electric drive bridge, which comprises: the driving shaft is used for driving the hub to rotate; a differential for transmitting power to the drive shaft, the differential being connected with the drive shaft; the first driving assembly and the second driving assembly respectively comprise a power part and a speed reducer transmission mechanism, and the power part is connected with the input end of the speed reducer transmission mechanism; the hollow shaft is sleeved on the periphery of the driving shaft and can rotate relative to the driving shaft, a hollow shaft gear and a sun gear are fixedly arranged on the hollow shaft, the output end of a speed reducer transmission mechanism of at least one of the first driving assembly and the second driving assembly is connected with the hollow shaft gear, the sun gear is connected with the planetary gear mechanism, and the planetary gear mechanism is connected with the differential mechanism; and the power components of the first driving assembly and the second driving assembly transmit power to the hollow shaft gear through the respective speed reducer transmission mechanisms, the hollow shaft gear drives the hollow shaft to rotate so as to drive the sun gear to rotate, the sun gear drives the planetary gear mechanism to rotate, and the planetary gear mechanism transmits power to the differential mechanism. According to the electric drive axle provided by the invention, the power component is utilized to drive the transmission mechanism of the speed reducer, then the transmission mechanism of the speed reducer is utilized to drive the hollow shaft, the planet carrier is driven by the hollow shaft, power is transmitted to the differential mechanism, and the differential mechanism transmits the power to the wheel hub through the driving shaft; according to the electric drive bridge, through the arrangement of the first drive assembly and the second drive assembly, in practical application, the first drive assembly and the second drive assembly can be adopted for independent driving, the operation reliability is guaranteed, and the first drive assembly and the second drive assembly can be simultaneously meshed with the hollow shaft gear, so that the power flows of the first drive assembly and the second drive assembly can be simultaneously transmitted to the hollow shaft, a large enough torque is provided for the hub, the use requirements of different environments are met, multiple selectable modes are provided, and the applicability is obviously improved; and, simple structure, it is convenient to maintain, use cost is low.
In a preferred embodiment, the transmission mechanism of the speed reducer comprises an input shaft, an intermediate shaft and a central shaft, the power component is connected with the input shaft, an input gear is fixedly arranged on the input shaft, an intermediate transmission gear, an intermediate high-speed gear and an intermediate low-speed gear are fixedly arranged on the intermediate shaft, a sliding sleeve is arranged on the central shaft, the sliding sleeve is circumferentially clamped with the central shaft, a central high-speed gear and a central low-speed gear are further sleeved on the central shaft, and the central shaft is rotationally connected with the central high-speed gear and the central low-speed gear; the input gear is meshed with the intermediate transmission gear, the intermediate high-speed gear is meshed with the central high-speed gear, the intermediate low-speed gear is meshed with the central low-speed gear, and the sliding sleeve can be clamped with the central high-speed gear or one of the central low-speed gears in a circumferential direction. According to the arrangement, at least two gears, namely a high-speed gear and a low-speed gear, are arranged in the speed reducer transmission mechanism, so that a multi-drive multi-gear setting mode is realized, the speed ratios of the gears in the speed reducer transmission mechanism in different drive assemblies can be different, and the speed ratios can be driven independently or simultaneously, so that the operation capacity of various working conditions is met.
The vehicle provided by the invention is provided with the above electric drive axle, and the electric drive axle has the technical effects, so the vehicle provided with the electric drive axle also has the corresponding technical effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of one embodiment of an electric drive bridge provided by the present invention;
FIG. 2 is a schematic illustration of the differential and hollow axle of the electric drive axle of FIG. 1;
FIG. 3 is a schematic illustration of the transmission mechanism of the retarder in the electric drive axle of FIG. 1;
FIG. 4 is a schematic diagram of a transmission principle of one embodiment of an electric drive bridge provided by the present invention;
wherein: z1-input gear; z2-intermediate drive gear; z3-intermediate high speed gear; z4-intermediate low-speed gear; z5-central high speed gear; z6-center low speed gear; z7-hollow shaft gear; 10-a first reducer transmission; 11-an input shaft; 12-a central axis; 121-center shaft outer teeth; 13-a sliding sleeve; 14-an intermediate shaft; 15-hollow shaft; 16-a sun gear; 17-a planet carrier; 18-an outer gear ring; 19-a differential; 20-a second reducer drive; 30 a-a first power component; 30 b-a second power component; 40-axle housing; 50-a first axle shaft; 60-a second half shaft; 70-a first hub; 80-a second hub; p1-planetary gear mechanism.
Detailed Description
The core of the invention is to provide an electric drive bridge which has a plurality of selectable modes, thereby effectively improving the applicability and meeting the diversified use requirements of commercial vehicles. Another core of the invention is to provide a vehicle comprising an electric drive axle as described above.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of an electric drive bridge according to an embodiment of the present invention; FIG. 2 is a schematic illustration of the reduction gear drive and differential of the electric drive axle of FIG. 1; FIG. 3 is a schematic illustration of the transmission mechanism of the retarder in the electric drive axle of FIG. 1; fig. 4 is a schematic diagram of a transmission principle of an embodiment of the electric drive bridge provided by the present invention.
In this embodiment, the electrically driven bridge comprises:
the driving shaft is used for driving the hub to rotate;
a differential 19 for transmitting power to a drive shaft, the differential 19 being connected to the drive shaft;
the first driving assembly and the second driving assembly respectively comprise a power part and a speed reducer transmission mechanism, and the power part is connected with the input end of the speed reducer transmission mechanism;
the driving mechanism comprises a hollow shaft 15 and a planetary gear mechanism P1, wherein the hollow shaft 15 is sleeved on the peripheral part of a driving shaft, the hollow shaft 15 can rotate relative to the driving shaft, a hollow shaft gear Z7 and a sun gear 16 are fixedly arranged on the hollow shaft 15, the output end of a speed reducer transmission mechanism of at least one of a first driving assembly and a second driving assembly is connected with the hollow shaft gear Z7, the sun gear 16 is connected with the planetary gear mechanism P1, and the planetary gear mechanism P1 is connected with a differential 19;
the controller is used for controlling the first driving assembly and the second driving assembly to act;
moreover, the power components of the first driving assembly and the second driving assembly transmit power to the hollow shaft gear Z7 through respective speed reducer transmission mechanisms, the hollow shaft gear Z7 drives the hollow shaft 15 to rotate so as to drive the sun gear 16 to rotate, the sun gear 16 drives the planetary gear mechanism P1 to rotate, and the planetary gear mechanism P1 transmits power to the differential 19; the input end of the transmission mechanism of the speed reducer is an input shaft 11, and the output end of the transmission mechanism of the speed reducer is a central shaft 12.
Specifically, the driving shaft includes a first half shaft 50 and a second half shaft 60, both the first half shaft 50 and the second half shaft 60 are connected to the differential 19, the first half shaft 50 is used for driving the first hub 70 to rotate, the second half shaft 60 is used for driving the second hub 80 to rotate, power is transmitted to the differential 19 through the speed reducer transmission mechanism, the left and right first half shafts 50 and the second half shafts 60 are driven through the differential 19, and then transmitted to the corresponding first hub 70 and the corresponding second hub 80.
Further, the automobile rear axle comprises an axle housing 40 used for fixing a driving shaft and a hub, a first driving assembly and a second driving assembly are arranged on the front side and the rear side of the axle housing 40, and after torque of the first driving assembly and torque of the second driving assembly are coupled through a hollow shaft gear Z7, the torque is transmitted to a differential 19 through a planetary gear mechanism P1 to achieve power transmission. Optionally, the power of the first driving assembly and the second driving assembly are integrally designed with the axle housing 40, or fixed together by screwing, so that the first driving assembly, the second driving assembly and other related components can work safely and efficiently in a stable and reliable environment.
The electric drive axle provided by the invention utilizes a power component to drive a transmission mechanism of a speed reducer, then utilizes the transmission mechanism of the speed reducer to drive a hollow shaft 15, further drives a planet carrier 17 through the hollow shaft 15 and transmits power to a differential 19, and the differential 19 transmits the power to a wheel hub through a driving shaft; the electric drive bridge has the advantages that through the arrangement of the first driving assembly and the second driving assembly, in practical application, the first driving assembly and the second driving assembly can be adopted for independent driving, the operation reliability is guaranteed, and the first driving assembly and the second driving assembly can be simultaneously meshed with the hollow shaft gear Z7, so that the power flows of the first driving assembly and the second driving assembly can be simultaneously transmitted to the hollow shaft 15, a large enough torque is provided for a hub, the use requirements of different environments are met, various selectable modes are provided, and the applicability is obviously improved; and, simple structure, it is convenient to maintain, use cost is low.
In some embodiments, the first drive assembly includes a first power component 30a and a first retarder transmission 10, the second drive assembly includes a second power component 30b and a second retarder transmission 20, and the first retarder transmission 10 is at a different speed ratio than the second retarder transmission 20; the controller is further configured to adjust the linear velocities of the output ends of the first reducer transmission mechanism 10 and the second reducer transmission mechanism 20 to be the same when the output ends of the first reducer transmission mechanism 10 and the second reducer transmission mechanism 20 are both engaged with the hollow shaft gear Z7. Specifically, the speed ratios of the first reducer transmission mechanism 10 and the second reducer transmission mechanism 20 are set to be different, and when the hollow shaft 15 is actually used, the hollow shaft can be driven to rotate by the first driving assembly or the second driving assembly according to needs, so that the applicability is improved. Further, the first power component 30a and the second power component 30b may each be a motor.
In some embodiments, the device further comprises a third driving assembly, wherein the third driving assembly comprises a power component and a speed reducer transmission mechanism, and the power component is connected with the input end of the speed reducer transmission mechanism; the output of the reduction gear transmission of at least one of the first, second and third drive assemblies is connected to a hollow shaft gear Z7. Specifically, the third driving assembly includes a third power component and a third reducer transmission mechanism, and the controller is further configured to adjust linear velocities of output ends of the corresponding first reducer transmission mechanism 10, second reducer transmission mechanism 20, or third reducer transmission mechanism to be the same when output ends of at least two of the first reducer transmission mechanism 10, second reducer transmission mechanism 20, and third reducer transmission mechanism are all engaged with the hollow shaft gear Z7. According to the arrangement, three groups of driving assemblies can be adopted, so that the transmission efficiency of the torque and the diversity of mode selection are further improved. Of course, the number of driving assemblies can be set as required, and two sets are preferred for saving cost and ensuring driving effect.
Preferably, the first drive assembly and the second drive assembly are located on both radial sides of the hollow shaft 15, ensuring stability of the drive to the hollow shaft 15, and when there are three sets of drive assemblies, preferably evenly distributed along the circumference of the hollow shaft 15.
In some embodiments, the planetary gear mechanism P1 includes a planet carrier 17 and an outer ring gear 18, an outer peripheral portion of the planet carrier 17 is engaged with the outer ring gear 18, the planet carrier 17 drives the differential 19 to rotate, and the outer ring gear 18 plays a role of supporting the planet carrier 17, thereby facilitating the rotation of the planet carrier 17.
In some embodiments, the transmission mechanism of the speed reducer comprises an input shaft 11, an intermediate shaft 14 and a central shaft 12, the power component is connected with the input shaft 11, an input gear Z1 is fixedly arranged on the input shaft 11, an intermediate transmission gear Z2, an intermediate high-speed gear Z3 and an intermediate low-speed gear Z4 are fixedly arranged on the intermediate shaft 14, a sliding sleeve 13 is arranged on the central shaft 12, the sliding sleeve 13 is circumferentially clamped with the central shaft 12, a central high-speed gear Z5 and a central low-speed gear Z6 are further sleeved on the central shaft 12, and the central shaft 12 is rotationally connected with the central high-speed gear Z5 and the central low-speed gear Z6; the input gear Z1 is meshed with the intermediate transmission gear Z2, the intermediate high-speed gear Z3 is meshed with the central high-speed gear Z5, the intermediate low-speed gear Z4 is meshed with the central low-speed gear Z6, and the sliding sleeve 13 can be circumferentially clamped with one of the central high-speed gear Z5 or the central low-speed gear Z6. Above-mentioned setting is through setting up two at least gears to among the reduction gear drive mechanism, high-speed gear and low-speed gear promptly to realize the mode that sets up of many drive multi-gear, and the velocity ratio of each gear can be different among the reduction gear drive mechanism among the different drive assembly, both can the individual drive, also can drive simultaneously, satisfy the operation ability of various operating modes. Further, the cooperative connection between the intermediate shaft 14 and the intermediate shaft 12 is preferably two-gear adjustment, but may be three-gear or higher, further improving the diversity of modes.
In some embodiments, the speed ratio of the intermediate high-speed gear Z3 and the central high-speed gear Z5 of the reduction gear transmission in the first drive assembly is different from the speed ratio of the intermediate high-speed gear Z3 and the central high-speed gear Z5 of the reduction gear transmission in the second drive assembly; the speed ratio of the intermediate low-speed gear Z4 and the central low-speed gear Z6 of the speed reducer transmission mechanism in the first driving assembly is different from the speed ratio of the intermediate low-speed gear Z4 and the central low-speed gear Z6 of the speed reducer transmission mechanism in the second driving assembly. Specifically, in the above manner, when only the first driving assembly is selected, two speed ratio transmissions may be adopted, and when only the second driving assembly is selected, another two different speed ratio transmissions may be adopted, so that the selectable driving manners are more various.
In some embodiments, there is normal mesh between the intermediate high speed gear Z3 and the central high speed gear Z5, and between the intermediate low speed gear Z4 and the central low speed gear Z6. That is, the intermediate high-speed gear Z3 and the central high-speed gear Z5, and the intermediate low-speed gear Z4 and the central low-speed gear Z6 are always in a meshed state, and the central shaft 12, the central high-speed gear Z5 and the central low-speed gear Z6 may be connected by a bushing.
In some embodiments, a shifting mechanism for controlling the movement of the sliding sleeve 13 is further included, the shifting mechanism is connected with the sliding sleeve 13, and the sliding sleeve 13 can slide along the axial direction of the central shaft 12 to realize alternative connection with the central high-speed gear Z5 or the central low-speed gear Z6, so as to realize the selection of two gears.
In some embodiments, the central shaft outer teeth 121 are further fixedly disposed on the central shaft 12, the central shaft outer teeth 121 are engaged with the hollow shaft gear Z7 to realize power transmission of the reducer transmission mechanism to the hollow shaft 15, power output is realized by the central shaft outer teeth 121, the central shaft outer teeth 121 may be directly disposed at one end of the central shaft 12 to improve stability of the central shaft outer teeth 121, and of course, a transmission gear may be fixedly disposed on the central shaft 12 to realize power output.
In one embodiment, as shown in fig. 1, the power of the first driving assembly is transmitted from the power component to the input gear Z1 through the input shaft 11, and the input gear Z1 is in mesh transmission with the intermediate transmission gear Z2; the intermediate transmission gear Z2, the intermediate high-speed gear Z3, the intermediate low-speed gear Z4 and the intermediate shaft 14 are integrated. When the sliding sleeve 13 of the internal spline connection central shaft 12 is connected with the central high-speed gear Z5, power is transmitted from the intermediate high-speed gear Z3 to the central high-speed gear Z5, then transmitted to the central shaft 12 through the sliding sleeve 13, power output and a first gear speed ratio are realized through the central shaft external teeth 121, and at the moment, the central low-speed gear Z6 idles along with the intermediate low-speed gear Z4. When the sliding sleeve 13 of the internal spline connection central shaft 12 is connected with the central low-speed gear Z6, power is transmitted from the intermediate low-speed gear Z4 to the central low-speed gear Z6, passes through the sliding sleeve 13, and is transmitted to the central shaft 12, and power output and a second gear speed ratio are realized through the central shaft external teeth 121. At this time, the center high-speed gear Z5 idles with the intermediate high-speed gear Z3. The power assembly of the second drive assembly is configured in a similar manner to the first assembly, except for a different reduction ratio, 11.72 and 3.16, respectively. The torques of the first and second drive assemblies are torque-coupled at hollow shaft gear Z7.
Further, when the electric drive axle system is in a first transmission mode, the first driving assembly and the second driving assembly simultaneously drive the planetary differential speed reduction system to realize torque coupling, so that the maximum driving torque is provided for the vehicle; when the electrically-driven axle system is in the second transmission mode, the first driving assembly or the second driving assembly separately drives the planetary differential speed reduction system in a time sharing manner to realize the efficient utilization of electric energy. By the mode, the power performance of the vehicle can be fully exerted, the requirements of the turning working condition of the vehicle and other uneven road working conditions on the speed difference of the left wheel and the right wheel are met by the mechanical differential 19, and the use and maintenance process is more convenient.
In operation, when the electric drive axle is in the first transmission mode, the power of the first power component 30a is reduced in speed and increased in torque through the low gear of the two-gear reduction box, and after the power of the first power component and the power of the second power component 30b are superposed on the hollow shaft gear Z7, the power flow force is transmitted to the differential 19 through the planetary gear mechanism P1, and the first half shaft 50 and the second half shaft 60 on the left and right sides are driven through the differential 19, so as to be transmitted to the corresponding first hub 70 and the corresponding second hub 80. When the electric drive axle is in the second transmission mode, the first power component 30a or the second power component 30b is in a non-power output state to the corresponding input shaft 11, and is mainly used for saving one power component under the condition that the automobile is not loaded, so that energy is saved. The electric drive bridge is in a first transmission mode, and the condition of power flow superposition is suitable for more common working conditions. The distributed electric drive axle system is in a first transmission mode, the sliding sleeve 13 shifting mechanism is in transmission connection with the central shaft 12 of the planetary gear mechanism P1, and the transmission speed ratio of the first power component 30a to the corresponding first half shaft 50 is 4.32-15.98; the transmission ratio of the first power member 30a to the corresponding first axle shaft 50 is 3.16-11.72. The electric transaxle is in a first drive mode having a drive ratio from the first power member 30a and the second power member 30b to the first axle shaft 50 and the second axle shaft 60 of 29.5 to 109.1.
In some embodiments, the speed change system in the electrically-driven axle system is arranged by adopting two gears, wherein the low-speed gear is mainly used in the working condition of climbing and the like requiring large traction force, and the high-speed gear is mainly used in the conventional transportation working condition of the vehicle and is automatically shifted, so that the operation efficiency is improved, and the labor intensity of a driver is reduced. The speed ratio of the low-speed gear is 29.5-109.1; the speed ratio of the high-speed gear is 2.45-8.5. The low gear is mainly applied when climbing is required, while the high gear is mainly applied when the vehicle is normally running. The low-gear speed ratio is set to be 12.5-75.5, generally, in the low-gear, the input of speed reduction and torque increase is realized through the planet carrier 17 of the planetary gear mechanism P1, optionally, the reduction ratio of the planet carrier 17 of the planetary gear mechanism P1 is 12.5-17, the requirement of the commercial vehicle on traction force under various ramps can be met, and the operation capacity of various working conditions is ensured; and the speed ratio of the high-speed gear is set to be 12.5-17, so that the requirement of the vehicle on the speed under the conventional working condition is met, and the time for transporting goods is shortened. According to different vehicles, different working conditions and loads, different specific speed ratios can be selected and set within the setting range of the speed ratios, so that the optimized power and torque transmission of the vehicle is realized, the requirements of the vehicle on traction force, speed and efficiency are met, and the lowest vehicle energy consumption requirement is realized. Compared with the existing electrically-driven axle speed change system, the electrically-driven axle has the advantages of simple and clear structure, relatively simple maintenance and lower maintenance and use cost, saves cost for users and improves benefit.
In some embodiments, as shown in fig. 4, which is a schematic power transmission route of an electrically-driven axle system, the first power component (30 a) and the second power component (30 b) both output power, and the power components and the two-gear reduction mechanism are configured in different sizes according to different power and torque of the power components, different models of commercial vehicles and different loading masses.
This electricity drive bridge realizes the combination of four fender positions through the reduction gear drive mechanism of two kinds of velocity ratios, through planet reduction gear and mechanical differential mechanism, forms two kinds of transmission modes and satisfies the demand of the different operating mode moments of vehicle, speed of a motor vehicle, makes the motor be in high efficiency running state all the time, promotes the efficiency of power assembly greatly, and is more energy-conserving. Compare in traditional fuel vehicle, the electricity of this scheme drives, realizes the zero release, and is pollution-free.
It should be noted that the distributed electric drive bridge of the present invention may be applied to transportation vehicles having functions similar to those of electric commercial vehicles, other electric vehicles and hybrid vehicles, and also to tricycles or other vehicles.
In addition to the above-mentioned electric drive axle, the present invention also provides a vehicle comprising the above-mentioned electric drive axle, and the structure of other parts of the vehicle is referred to in the prior art and will not be described in detail herein.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The electric drive bridge provided by the invention is described in detail above. The principles and embodiments of the present invention have been described herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. An electrically driven bridge, comprising:
the driving shaft is used for driving the hub to rotate;
a differential (19) for transmitting power to the drive shaft, the differential (19) being connected with the drive shaft;
the first driving assembly and the second driving assembly respectively comprise a power part and a speed reducer transmission mechanism, and the power part is connected with the input end of the speed reducer transmission mechanism;
the transmission mechanism comprises a hollow shaft (15) and a planetary gear mechanism (P1), wherein the hollow shaft (15) is sleeved on the periphery of the driving shaft, the hollow shaft (15) can rotate relative to the driving shaft, a hollow shaft gear (Z7) and a sun gear (16) are fixedly arranged on the hollow shaft (15), the output end of a reducer transmission mechanism of at least one of the first driving assembly and the second driving assembly is connected with the hollow shaft gear (Z7), the sun gear (16) is connected with the planetary gear mechanism (P1), and the planetary gear mechanism (P1) is connected with the differential (19);
the controller is used for controlling the first driving assembly and the second driving assembly to act;
and the power parts of the first driving assembly and the second driving assembly transmit power to the hollow shaft gear (Z7) through the respective speed reducer transmission mechanisms, the hollow shaft gear (Z7) drives the hollow shaft (15) to rotate so as to drive the sun gear (16) to rotate, the sun gear (16) drives the planetary gear mechanism (P1) to rotate, and the planetary gear mechanism (P1) transmits power to the differential mechanism (19).
2. Electric drive bridge according to claim 1, characterized in that the first drive assembly comprises a first power part (30 a) and a first retarder transmission (10), the second drive assembly comprises a second power part (30 b) and a second retarder transmission (20), and the first retarder transmission (10) and the second retarder transmission (20) have different speed ratios; the controller is further used for adjusting the linear velocities of the output ends of the first speed reducer transmission mechanism (10) and the second speed reducer transmission mechanism (20) to be the same when the output ends of the first speed reducer transmission mechanism (10) and the second speed reducer transmission mechanism (20) are both meshed with the hollow shaft gear (Z7).
3. The electric drive bridge of claim 1, further comprising a third drive assembly including a power member and a speed reducer transmission, the power member being connected to an input of the speed reducer transmission; the output end of the reducer transmission mechanism of at least one of the first drive assembly, the second drive assembly and the third drive assembly is connected with the hollow shaft gear (Z7).
4. Electric drive axle according to claim 1, characterized in that the planetary gear (P1) comprises a planet carrier (17) and an outer ring gear (18), the outer circumference of the planet carrier (17) engaging with the outer ring gear (18), the planet carrier (17) carrying the differential (19) in rotation.
5. Electric drive bridge according to claim 1, characterized in that the drive shaft comprises a first half shaft (50) and a second half shaft (60), the first half shaft (50) and the second half shaft (60) being connected to the differential (19), the first half shaft (50) being intended to drive a first wheel hub (70) in rotation and the second half shaft (60) being intended to drive a second wheel hub (80) in rotation; an axle housing (40) is also included for securing the drive shaft and the wheel hub.
6. The electric drive bridge according to any one of claims 1 to 5, characterized in that the reducer transmission mechanism comprises an input shaft (11), an intermediate shaft (14) and a central shaft (12), the power component is connected with the input shaft (11), an input gear (Z1) is fixedly arranged on the input shaft (11), an intermediate transmission gear (Z2), an intermediate high-speed gear (Z3) and an intermediate low-speed gear (Z4) are fixedly arranged on the intermediate shaft (14), a sliding sleeve (13) is arranged on the central shaft (12), the sliding sleeve (13) is circumferentially clamped with the central shaft (12), a central high-speed gear (Z5) and a central low-speed gear (Z6) are further sleeved on the central shaft (12), and the central shaft (12) is rotationally connected with the central high-speed gear (Z5) and the central low-speed gear (Z6); input gear (Z1) with intermediate drive gear (Z2) meshing, middle high speed gear (Z3) with central high speed gear (Z5) meshing, middle low speed gear (Z4) with central low speed gear (Z6) meshing, sliding sleeve (13) can with central high speed gear (Z5) or central low speed gear (Z6) one circumference joint.
7. Electric drive bridge according to claim 6, characterized in that the speed ratio of the intermediate high-speed gear (Z3) of the reduction gear transmission in the first drive assembly to the central high-speed gear (Z5) is different from the speed ratio of the intermediate high-speed gear (Z3) of the reduction gear transmission in the second drive assembly to the central high-speed gear (Z5); the speed ratio of the intermediate low-speed gear (Z4) and the central low-speed gear (Z6) of the reducer transmission mechanism in the first drive assembly is different from the speed ratio of the intermediate low-speed gear (Z4) and the central low-speed gear (Z6) of the reducer transmission mechanism in the second drive assembly.
8. Electric drive bridge according to claim 7, characterized in that the meshing between the intermediate high-speed gear (Z3) and the central high-speed gear (Z5) and between the intermediate low-speed gear (Z4) and the central low-speed gear (Z6) is normal.
9. The electric drive axle according to claim 8, characterized in that the central shaft (12) is further provided with a central shaft outer tooth (121), and the central shaft outer tooth (121) is engaged with the hollow shaft gear (Z7) to realize the power transmission of the reducer transmission mechanism to the hollow shaft (15).
10. A vehicle comprising an electric drive bridge, characterized in that it is an electric drive bridge according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211482433.6A CN115675072A (en) | 2022-11-24 | 2022-11-24 | Electric drive bridge and vehicle with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211482433.6A CN115675072A (en) | 2022-11-24 | 2022-11-24 | Electric drive bridge and vehicle with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115675072A true CN115675072A (en) | 2023-02-03 |
Family
ID=85055913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211482433.6A Pending CN115675072A (en) | 2022-11-24 | 2022-11-24 | Electric drive bridge and vehicle with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115675072A (en) |
-
2022
- 2022-11-24 CN CN202211482433.6A patent/CN115675072A/en active Pending
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