CN113733881A - Dual-motor mechanical coupling electric drive bridge and vehicle - Google Patents
Dual-motor mechanical coupling electric drive bridge and vehicle Download PDFInfo
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- CN113733881A CN113733881A CN202111208018.7A CN202111208018A CN113733881A CN 113733881 A CN113733881 A CN 113733881A CN 202111208018 A CN202111208018 A CN 202111208018A CN 113733881 A CN113733881 A CN 113733881A
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- 238000005859 coupling reaction Methods 0.000 title claims abstract description 30
- 230000008878 coupling Effects 0.000 title claims abstract description 29
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 111
- 230000005540 biological transmission Effects 0.000 claims abstract description 83
- 230000007246 mechanism Effects 0.000 claims description 29
- 230000009467 reduction Effects 0.000 claims description 16
- 230000009977 dual effect Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
- F16H37/04—Combinations of toothed gearings only
- F16H37/042—Combinations of toothed gearings only change gear transmissions in group arrangement
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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
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
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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
- 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
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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
- 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
- B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
- B60K17/165—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing provided between independent half axles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
- F16H37/04—Combinations of toothed gearings only
- F16H37/042—Combinations of toothed gearings only change gear transmissions in group arrangement
- F16H37/046—Combinations of toothed gearings only change gear transmissions in group arrangement with an additional planetary gear train, e.g. creep gear, overdrive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2400/00—Special features of vehicle units
- B60Y2400/70—Gearings
- B60Y2400/73—Planetary gearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/0021—Transmissions for multiple ratios specially adapted for electric vehicles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
- F16H2200/0034—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising two forward speeds
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
- Retarders (AREA)
Abstract
The invention discloses a double-motor mechanical coupling electric drive axle and a vehicle, and relates to the technical field of electric drive axles. The double-motor mechanical coupling electric drive bridge comprises a first motor, a second motor, a first planetary reducer, a second planetary reducer and a driving shaft. The first motor is in transmission connection with a first sun gear of the first planetary reducer, and a first planet carrier of the first planetary reducer is in transmission connection with the driving shaft. The second planetary reducer is parallel to the first planetary reducer, arranged in parallel and connected with the driving shaft in a transmission mode, and the second motor is connected with the second planetary reducer in a transmission mode and outputs power to the driving shaft through the second planetary reducer. The first gear ring of the first planetary reducer is in reverse transmission connection with the second planetary reducer, so that the power of the first motor can be output through the first gear ring and the second planetary reducer. The double-motor mechanical coupling electric drive bridge and the vehicle have the advantages of being low in cost and good in stability.
Description
Technical Field
The invention relates to the technical field of electrically driven axles, in particular to a double-motor mechanical coupling electrically driven axle and a vehicle.
Background
The axle is used as a mechanism for bearing the load of the automobile and maintaining the normal running of the automobile on a road, and the power stable output of the axle is important. The existing electric drive axle generally adopts an electronic control mode to control the power output of two motors when the two motors are matched with the conditions of automobile steering and the like, and has higher cost and poorer stability.
In view of the above, it is important to develop a dual-electromechanical-coupling electrically driven bridge and a vehicle that can solve the above technical problems.
Disclosure of Invention
The invention aims to provide a double-motor mechanical coupling electric drive axle and a vehicle, which have the characteristics of low cost and good stability.
The invention provides a technical scheme that:
in a first aspect, an embodiment of the present invention provides a dual-motor mechanical coupling electric drive bridge, which includes a first motor, a second motor, a first planetary reducer, a second planetary reducer, and a drive shaft;
the first motor is in transmission connection with a first sun gear of the first planetary reducer, and a first planet carrier of the first planetary reducer is in transmission connection with the driving shaft, so that the first motor can output torque sequentially through the first planet carrier and the driving shaft;
the second planetary reducer is parallel to and parallel to the first planetary reducer and is in transmission connection with the driving shaft, and the second motor is in transmission connection with the second planetary reducer and outputs power to the driving shaft through the second planetary reducer;
the first gear ring of the first planetary reducer is in reverse transmission connection with the second planetary reducer, so that the power of the first motor can be output through the first gear ring and the second planetary reducer.
With reference to the first aspect, in another implementation manner of the first aspect, the second motor is in transmission connection with a second sun gear of the second planetary reducer, and a second carrier of the second planetary reducer is in transmission connection with the driving shaft, so that the second motor can output torque through the second carrier and the driving shaft;
the second ring gear of the second planetary reducer is in reverse drive connection with the first ring gear so that the first ring gear can be reversed relative to the second ring gear.
With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the first motor and the first gear ring are coaxially disposed, and the second motor and the second gear ring are coaxially disposed.
With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the first planetary reducer and the second planetary reducer are symmetrically arranged on a vertical plane where the driving shaft is located.
With reference to the first aspect and the foregoing implementations of the first aspect, in another implementation of the first aspect, the drive shaft includes a first half shaft and a second half shaft, and the dual-motor mechanically-coupled electrically-driven axle further includes a differential;
the differential is in transmission connection with the first half shaft and the second half shaft respectively and is in transmission connection with the first planet carrier and the second planet carrier respectively so as to transmit the power of the first motor and the power of the second motor to the first half shaft and the second half shaft.
With reference to the first aspect and the foregoing implementation manner, in another implementation manner of the first aspect, the dual-motor mechanically-coupled electrically-driven axle further includes a shift mechanism, and the shift mechanism is respectively connected to the differential, the first carrier, and the second carrier to drivingly connect the first carrier and the differential, and to drivingly connect the second carrier and the differential.
With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the shift mechanism includes a meshing sleeve, a first driven gear, a second driven gear, two first driving gears, and two second driving gears;
one first driving gear and one second driving gear are both connected with the first planet carrier, and the other first driving gear and the other second driving gear are both connected with the second planet carrier;
the first driven gear and the second driven gear are coaxially arranged and are in transmission connection with the first driving gear and the second driving gear respectively, the meshing sleeve is movably arranged between the first driven gear and the second driven gear and is in transmission connection with the differential mechanism, and the meshing sleeve can slide along the axial direction so as to be in transmission connection with the first driven gear or the second driven gear and be in transmission connection with the differential mechanism and two first driving gears or be in transmission connection with the differential mechanism and two second driving gears.
With reference to the first aspect and the foregoing implementation manner, in another implementation manner of the first aspect, the dual-motor mechanically-coupled electrically-driven bridge further includes a reverse transmission mechanism, and the reverse transmission mechanism is in transmission connection with the first gear ring and the second gear ring respectively to reversely output the input torque.
With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, external teeth are disposed on both the outer side of the first gear ring and the outer side of the second gear ring, and the first gear ring is externally engaged with the second gear ring.
In a second aspect, the embodiment of the present invention further provides a vehicle, which includes the dual-motor mechanically-coupled electrically-driven bridge. The double-motor mechanical coupling electric drive bridge comprises a first motor, a second motor, a first planetary reducer, a second planetary reducer and a driving shaft; the first motor is in transmission connection with a first sun gear of the first planetary reducer, and a first planet carrier of the first planetary reducer is in transmission connection with the driving shaft, so that the first motor can output torque sequentially through the first planet carrier and the driving shaft; the second planetary reducer is parallel to and parallel to the first planetary reducer and is in transmission connection with the driving shaft, and the second motor is in transmission connection with the second planetary reducer and outputs power to the driving shaft through the second planetary reducer; the first gear ring of the first planetary reducer is in reverse transmission connection with the second planetary reducer, so that the power of the first motor can be output through the first gear ring and the second planetary reducer.
Compared with the prior art, the double-motor mechanical coupling electric drive bridge provided by the embodiment of the invention has the beneficial effects that compared with the prior art, the double-motor mechanical coupling electric drive bridge comprises the following components:
the double-motor mechanical coupling electric drive bridge comprises a first motor, a second motor, a first planetary reducer, a second planetary reducer and a driving shaft. The first motor is in transmission connection with a first sun gear of the first planetary reducer, and a first planet carrier of the first planetary reducer is in transmission connection with the driving shaft, so that the power of the first motor can sequentially pass through the first sun gear, the first planet carrier and the driving shaft to output torque. The second planetary reducer is parallel to the first planetary reducer and is arranged in parallel, the second planetary reducer is also in transmission connection with the driving shaft, the second motor is in transmission connection with the second planetary reducer, and the second motor can output power to the driving shaft through the second planetary reducer. And the first gear ring of the first planetary reducer is in reverse transmission connection with the second planetary reducer, so that the power of the first motor can be output through the first gear ring and the second planetary reducer. In other words, in the first row of speed reducer, the first ring gear is in a floating state and is in reverse transmission connection with the second planetary speed reducer, so that when the torque output by the first motor is larger than the torque output by the second motor, the first motor drives the first ring gear to rotate reversely, and the first ring gear is in reverse transmission connection with the second planetary speed reducer, so that part of the power of the first motor is transmitted to the second planetary speed reducer through the first ring gear to achieve the purpose of power coupling.
The beneficial effects of the vehicle provided by the embodiment of the invention compared with the prior art are the same as the beneficial effects of the double-motor mechanical coupling electric drive bridge compared with the prior art, and are not described again.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below. It is appreciated that the following drawings depict only certain embodiments of the invention and are therefore not to be considered limiting of its scope. For a person skilled in the art, it is possible to derive other relevant figures from these figures without inventive effort.
Fig. 1 is a schematic structural diagram of a dual-electromechanical mechanically coupled electrically driven bridge according to an embodiment of the present invention.
Icon: 50-a wheel; 10-double-motor mechanical coupling electric drive bridge; 11-a first planetary reducer; 111-a first sun gear; 112-a first planet; 113-a first planet carrier; 114-a first ring gear; 12-a second planetary reducer; 121-a second sun gear; 122-second planet; 123-a second planet carrier; 124-a second ring gear; 13-a drive shaft; 131-a first half shaft; 132-a second half shaft; 14-a reverse drive mechanism; 15-wheel reduction gear; 16-a first electric machine; 17-a second electric machine; 18-a differential; 19-a gear shift mechanism; 190-engaging sleeve; 191 — a first driven gear; 192-a second driven gear; 1911-a first driving gear; 1922-second driving gear.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. The terms "upper", "lower", "inner", "outer", "left", "right", and the like, refer to an orientation or positional relationship as shown in the drawings, or as would be conventionally found in use of the inventive product, or as would be conventionally understood by one skilled in the art, and are used merely to facilitate the description and simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the present invention. The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It is also to be understood that, unless expressly stated or limited otherwise, the terms "disposed," "connected," and the like are intended to be open-ended, and mean "connected," i.e., fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The following detailed description of embodiments of the invention refers to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a dual electromechanical mechanical coupling electric drive bridge 10 according to an embodiment of the present invention.
The embodiment of the invention provides a double-motor mechanical coupling electric-driven bridge 10, and the double-motor mechanical coupling electric-driven bridge 10 has the characteristics of lower cost and better stability. The dual-motor mechanical coupling electric drive bridge 10 can be applied to vehicles such as automobiles and trucks. When the dual-electromechanical mechanical coupling electric drive axle 10 is applied to a vehicle, the dual-electromechanical mechanical coupling electric drive axle 10 is connected with a wheel 50 of the vehicle, and the purpose of maintaining the vehicle running is achieved by driving the wheel 50 to rotate.
The structural composition, the operation principle and the advantageous effects of the dual-electromechanical mechanically coupled electrically driven bridge 10 according to the embodiment of the present invention will be described in detail below.
With continued reference to fig. 1, the dual-motor mechanically-coupled electric drive bridge 10 includes a first motor 16, a second motor 17, a first planetary reducer 11, a second planetary reducer 12, and a drive shaft 13. The first motor 16 is in transmission connection with the first sun gear 111 of the first planetary reducer 11, and the first carrier 113 of the first planetary reducer 11 is in transmission connection with the drive shaft 13, so that the power of the first motor 16 can sequentially output torque through the first sun gear 111, the first planetary gear 112, the first carrier 113, and the drive shaft 13. The second planetary reducer 12 is parallel to and parallel to the first planetary reducer 11, the second planetary reducer 12 is also in transmission connection with the driving shaft 13, the second motor 17 is in transmission connection with the second planetary reducer 12, and the second motor 17 can output power to the driving shaft 13 through the second planetary reducer 12. The first ring gear 114 of the first planetary reducer 11 is in reverse drive connection with the second planetary reducer 12, so that the power of the first motor 16 can be output through the first ring gear 114 and the second planetary reducer 12. In other words, in the first row of speed reducers, the first ring gear 114 is in a floating state and is in reverse transmission connection with the second planetary speed reducer 12, so that when the torque output by the first motor 16 is greater than the torque output by the second motor 17, the first motor 16 drives the first ring gear 114 to rotate reversely, and the first ring gear 114 is in reverse transmission connection with the second planetary speed reducer 12, so that part of the power of the first motor 16 is transmitted to the second planetary speed reducer 12 through the first ring gear 114 to achieve the purpose of power coupling, and the power coupling is realized through a mechanical structure, so that the cost is low, and the stability is high.
Further, the second motor 17 is in transmission connection with the second sun gear 121 of the second planetary gear reducer 12, and the second carrier 123 of the second planetary gear reducer 12 is in transmission connection with the drive shaft 13, so that the power of the second motor 17 can be output sequentially through the second sun gear 121, the second planetary gear 122, the second carrier 123, and the drive shaft 13. While the second ring gear 124 of the second planetary reducer 12 is in reverse drive connection with the first ring gear 114 to enable the first ring gear 114 to be reversed relative to the second ring gear 124.
In other words, in the second row reducer, the second ring gear 124 is also in a floating state, and the first ring gear 114 is in reverse drive connection with the second ring gear 124. In this way, because the first ring gear 114 is in reverse drive connection with the second ring gear 124, the first ring gear 114 and the second ring gear 124 remain stationary while the torque output by the first electric machine 16 is the same as the torque output by the first electric machine 16; when the torque output by the first motor 16 is greater than the torque output by the second motor 17, the first motor 16 drives the first gear ring 114 to rotate reversely through the first sun gear 111 and the first planetary gear 112, and the first gear ring 114 is in reverse transmission connection with the second gear ring 124, so that the first gear ring 114 drives the second gear ring 124 to rotate normally, and part of the power of the first motor 16 is transmitted to the second planetary reducer 12 and output; when the torque output by the first motor 16 is smaller than the torque output by the second motor 17, the second motor 17 drives the second ring gear 124 to rotate reversely through the second sun gear 121 and the second planet gear 122, and the second ring gear 124 is in reverse transmission connection with the first ring gear 114, so that the second ring gear 124 drives the first ring gear 114 to rotate normally, and part of the power of the second motor 17 is transmitted to the first planet reducer 11 and output. Therefore, the purpose of power coupling is achieved through a mechanical structure, the cost is low, and the stability is high.
It should be noted that, in the present embodiment, the two-motor mechanically-coupled electric drive bridge 10 may further include a reverse transmission mechanism 14, and the reverse transmission mechanism 14 is in transmission connection with the first ring gear 114 and the second ring gear 124 respectively to output the input torque in a reverse direction, in other words, the first ring gear 114 and the second ring gear 124 are in reverse transmission connection through the reverse transmission mechanism 14 to transmit power between the first planetary speed reducer 11 and the second planetary speed reducer 12 through the reverse transmission mechanism 14 when a torque magnitude difference occurs between the first electric motor 16 and the second electric motor 17, so as to couple power.
The reverse transmission mechanism 14 may be a transmission mechanism such as a gear box capable of reversely outputting the input torque, and the embodiment is not limited to the specific structure thereof.
In addition, in other embodiments, the outer side of the first gear ring 114 may also be provided with external teeth (not shown), the outer side of the second gear ring 124 may also be provided with external teeth, and the first gear ring 114 is externally meshed with the second gear ring 124, in other words, the outer circumference of the first gear ring 114 and the outer circumference of the second gear ring 124 are both provided with an outer wheel, and the first gear ring 114 and the second gear ring 124 are externally meshed through the respective external teeth, so that the purpose of reverse transmission connection between the first gear ring 114 and the second gear ring 124 is achieved, and the structure is simpler.
With continued reference to fig. 1, the first electric machine 16 and the first ring gear 114 are coaxially disposed, and the second electric machine 17 and the second ring gear 124 are coaxially disposed. In other words, the first electric machine 16 is disposed coaxially with the first planetary reduction gear 11, and the second electric machine 17 is disposed coaxially with the second planetary reduction gear 12, so that the structure of the dual-motor mechanically-coupled electric drive bridge 10 is more compact.
Further, the first planetary reduction gear 11 and the second planetary reduction gear 12 are disposed symmetrically with respect to a vertical plane in which the drive shaft 13 is located. In other words, the first planetary gear set 11 is substantially located at both front and rear sides of the driving shaft 13, so that the first carrier 113 and the second carrier 123 drive the driving shaft 13 from the front and rear sides of the driving shaft 13, respectively, improving the stability of transmission and further improving the compactness of the structure.
Further, in other embodiments, at the time of meshing the outer peripheral surface of the first ring gear 114 with the outer peripheral surface of the second ring gear 124, the meshing position of the outer peripheral surface of the first ring gear 114 with the outer peripheral surface of the second ring gear 124 may be set higher than the drive shaft 13 or lower than the drive shaft 13.
Further, the driving axle 13 may further include a first half axle 131 and a second half axle 132, and the two-motor mechanically-coupled electrically-driven axle 10 may further include a differential 18, wherein the differential 18 is in transmission connection with the first half axle 131 and the second half axle 132, respectively, and in transmission connection with the first carrier 113 and the second carrier 123, respectively, to transmit the power of the first electric machine 16 and the power of the second electric machine 17 to the first half axle 131 and the second half axle 132, in other words, the power of the first electric machine 16 and the power of the second electric machine 17 are transmitted to the differential 18 through the first planetary reducer 11 and the second planetary reducer 12, respectively, then transmitted to the first half axle 131 and the second half axle 132, respectively, and then transmitted to the connecting wheels 50 through the first half axle 131 and the second half axle 132, respectively, so that the two-motor mechanically-coupled electrically-driven axle 10 can perform a differential function.
Further, the two-motor mechanically-coupled electric drive axle 10 may further include a shift mechanism 19, wherein the shift mechanism 19 is connected to the differential 18, also connected to the first carrier 113 and the second carrier 123, to drivingly connect the first carrier 113 and the differential 18, and drivingly connect the second carrier 123 and the differential 18, in other words, the first carrier 113 is drivingly connected to the differential 18 through the shift mechanism 19, and the second carrier 123 is drivingly connected to the differential 18 through the shift mechanism 19, so as to improve the versatility of the two-motor mechanically-coupled electric drive axle 10.
In this embodiment, the shift mechanism 19 may include a sleeve 190, two first driving gears 1911, two second driving gears 1922, a first driven gear 191 and a second driven gear 192. One first driving gear 1911 and one second driving gear 1922 are both connected to the first carrier 113, and the other first driving gear 1911 and the other second driving gear 1922 are both connected to the second carrier 123. The first driven gear 191 and the second driven gear 192 are coaxially arranged and are in transmission connection with the first driving gear 1911 and the second driving gear 1922 respectively, the engaging sleeve 190 is movably arranged between the first driven gear 191 and the second driven gear 192 and is in transmission connection with the differential 18, and the engaging sleeve 190 can slide along the axial direction so as to be in transmission connection with the first driven gear 191 or the second driven gear 192, so that the differential 18 and the two first driving gears 1911 are in transmission connection through the engaging sleeve 190, or the differential 18 and the two second driving gears 1922 are in transmission connection.
In other words, when the sleeve 190 slides in the axial direction and is in transmission connection with the first driven gear 191, the power output by the first carrier 113 can be transmitted to the wheel 50 through the corresponding first driving gear 1911, the first driven gear 191 and the differential 18, and the power output by the second carrier 123 can be transmitted to the wheel 50 through the corresponding first driving gear 1911, the first driven gear 191 and the differential 18; when the sleeve 190 slides in the axial direction and is in transmission connection with the second driven gear 192, the power output by the first carrier 113 can be transmitted to the wheel 50 through the corresponding second driving gear 1922, the second driven gear 192 and the differential 18, and the power output by the second carrier 123 can be transmitted to the wheel 50 through the corresponding second driving gear 1922, the second driven gear 192 and the differential 18. Thereby realize the operation of shifting, its simple structure, and the cost is lower.
In other embodiments, the shift mechanism 19 may be disposed on the first carrier 113 and the second carrier 123, and the shift mechanism 19 may also adopt other types of shift structures.
In addition, the dual-electromechanical mechanical coupling electric drive axle 10 can also be provided with multi-stage speed reduction such as three-stage speed reduction, four-stage speed reduction and the like, the wheel reduction gear 15 can be arranged at the end of the first half shaft 131 and the end of the second half shaft 132, the wheel reduction gear 15 can be a planetary speed reduction gear, a cylindrical gear speed reduction gear or a combination of the two speed reduction gears, and of course, in other embodiments, the wheel reduction gear 15 is not arranged, and the first half shaft 131 is directly connected with the wheel 50.
The working principle of the double-motor mechanical coupling electric drive bridge 10 provided by the embodiment of the invention is as follows:
the dual-motor mechanically-coupled electric drive bridge 10 includes a first motor 16, a second motor 17, a first planetary reducer 11, a second planetary reducer 12, and a drive shaft 13. The first motor 16 is in transmission connection with the first sun gear 111 of the first planetary reducer 11, and the first carrier 113 of the first planetary reducer 11 is in transmission connection with the drive shaft 13, so that the power of the first motor 16 can sequentially output torque through the first sun gear 111, the first planetary gear 112, the first carrier 113, and the drive shaft 13. The second planetary reducer 12 is parallel to and parallel to the first planetary reducer 11, the second planetary reducer 12 is also in transmission connection with the driving shaft 13, the second motor 17 is in transmission connection with the second planetary reducer 12, and the second motor 17 can output power to the driving shaft 13 through the second planetary reducer 12. The first ring gear 114 of the first planetary reducer 11 is in reverse drive connection with the second planetary reducer 12, so that the power of the first motor 16 can be output through the first ring gear 114 and the second planetary reducer 12. In other words, in the first row of speed reducers, the first ring gear 114 is in a floating state and is in reverse transmission connection with the second planetary speed reducer 12, so that when the torque output by the first motor 16 is greater than the torque output by the second motor 17, the first motor 16 drives the first ring gear 114 to rotate reversely, and the first ring gear 114 is in reverse transmission connection with the second planetary speed reducer 12, so that part of the power of the first motor 16 is transmitted to the second planetary speed reducer 12 through the first ring gear 114 to achieve the purpose of power coupling, and the power coupling is realized through a mechanical structure, so that the cost is low, and the stability is high.
In summary, the embodiment of the present invention provides a dual-electromechanical-driven and dual-electromechanical-coupled electrically-driven bridge 10, which has the characteristics of low cost and good stability.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that the features in the above embodiments may be combined with each other and the present invention may be variously modified and changed without conflict. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The present embodiments are to be considered as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The double-motor mechanical coupling electric drive bridge is characterized by comprising a first motor (16), a second motor (17), a first planetary reducer (11), a second planetary reducer (12) and a driving shaft (13);
the first motor (16) is in transmission connection with a first sun gear (111) of the first planetary reducer (11), and a first planet carrier (113) of the first planetary reducer (11) is in transmission connection with the driving shaft (13), so that the first motor (16) can sequentially output torque through the first planet carrier (113) and the driving shaft (13);
the second planetary reducer (12) is parallel to and parallel to the first planetary reducer (11) and is in transmission connection with the driving shaft (13), and the second motor (17) is in transmission connection with the second planetary reducer (12) and outputs power to the driving shaft (13) through the second planetary reducer (12);
the first ring gear (114) of the first planetary reducer (11) is in reverse transmission connection with the second planetary reducer (12), so that the power of the first motor (16) can be output through the first ring gear (114) and the second planetary reducer (12).
2. The dual-motor mechanically-coupled electric drive axle according to claim 1, characterized in that the second electric motor (17) is in driving connection with a second sun gear (121) of the second planetary gear reducer (12), and a second planet carrier (123) of the second planetary gear reducer (12) is in driving connection with the drive shaft (13), so that the second electric motor (17) can output a torque through the second planet carrier (123) and the drive shaft (13);
the second ring gear (124) of the second planetary gear set (12) is in a reverse drive connection with the first ring gear (114) in order to be able to reverse the first ring gear (114) relative to the second ring gear (124).
3. The dual-electromechanical mechanically coupled electrical drive bridge according to claim 2, wherein the first electrical machine (16) and the first ring gear (114) are coaxially arranged, and the second electrical machine (17) and the second ring gear (124) are coaxially arranged.
4. The dual electromechanical mechanically coupled electrically driven bridge according to claim 1, characterized in that the first planetary reduction gear (11) and the second planetary reduction gear (12) are arranged symmetrically with respect to a vertical plane in which the drive shaft (13) is located.
5. The dual electromechanical mechanically coupled electrically driven axle according to claim 2, characterized in that said drive shaft (13) comprises a first half-shaft (131) and a second half-shaft (132), said dual electromechanical mechanically coupled electrically driven axle further comprising a differential (18);
the differential (18) is in transmission connection with the first half shaft (131) and the second half shaft (132) respectively, and is in transmission connection with the first planet carrier (113) and the second planet carrier (123) respectively, so as to transmit the power of the first motor (16) and the power of the second motor (17) to the first half shaft (131) and the second half shaft (132).
6. The dual electromechanical mechanically coupled electric drive axle according to claim 5, further comprising a gear shift mechanism (19), said gear shift mechanism (19) being connected with said differential (18), said first carrier (113) and said second carrier (123) respectively, for drivingly connecting said first carrier (113) and said differential (18), and for drivingly connecting said second carrier (123) and said differential (18).
7. The dual electromechanical mechanically coupled electric drive axle according to claim 6, wherein said shifting mechanism (19) comprises a sleeve (190), a first driven gear (191), a second driven gear (192), two first driving gears (1911) and two second driving gears (1922);
one of said first driving gear (1911) and one of said second driving gear (1922) are both connected to said first carrier (113), and the other of said first driving gear (1911) and the other of said second driving gear (1922) are both connected to said second carrier (123);
the first driven gear (191) and the second driven gear (192) are coaxially arranged and are in transmission connection with the first driving gear (1911) and the second driving gear (1922) respectively, the meshing sleeve (190) is movably arranged between the first driven gear (191) and the second driven gear (192) and is in transmission connection with the differential (18), and the meshing sleeve (190) can slide along the axial direction and is in transmission connection with the first driven gear (191) or the second driven gear (192) so as to be in transmission connection with the differential (18) and the two first driving gears (1911) or the differential (18) and the two second driving gears (1922).
8. The dual electromechanical mechanically coupled electrical driven bridge according to claim 2, further comprising a reverse transmission mechanism (14), wherein the reverse transmission mechanism (14) is in transmission connection with the first gear ring (114) and the second gear ring (124) respectively to reversely output the input torque.
9. The dual electromechanical, mechanically coupled, electric drive bridge according to claim 2, characterized in that both the outer side of the first gear ring (114) and the outer side of the second gear ring (124) are provided with external teeth, and the first gear ring (114) is externally meshed with the second gear ring (124).
10. A vehicle comprising a two-motor mechanically coupled electric drive axle according to any one of claims 1 to 9.
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