CN115610219A - Multi-gear coaxial electric drive bridge structure - Google Patents

Multi-gear coaxial electric drive bridge structure Download PDF

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Publication number
CN115610219A
CN115610219A CN202211267465.4A CN202211267465A CN115610219A CN 115610219 A CN115610219 A CN 115610219A CN 202211267465 A CN202211267465 A CN 202211267465A CN 115610219 A CN115610219 A CN 115610219A
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CN
China
Prior art keywords
gear
row
shifting
assembly
planet carrier
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Pending
Application number
CN202211267465.4A
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Chinese (zh)
Inventor
李磊
戴恩虎
杨海华
王康林
祖厚友
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Suzhou Lvkon Transmission S&T Co Ltd
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Suzhou Lvkon Transmission S&T Co Ltd
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Application filed by Suzhou Lvkon Transmission S&T Co Ltd filed Critical Suzhou Lvkon Transmission S&T Co Ltd
Priority to CN202211267465.4A priority Critical patent/CN115610219A/en
Publication of CN115610219A publication Critical patent/CN115610219A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
    • B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)

Abstract

The invention provides a multi-gear coaxial electric drive bridge structure, which is coaxially arranged in all the arrangements, has small volume, compact structure and simple arrangement of the whole vehicle, is reasonable in mass distribution of a power assembly of the electric drive bridge, is coaxial with a theoretical mass center and an axle housing axis, and greatly improves the stress and vibration conditions. It comprises the following steps: the differential assembly comprises a differential, an A-side half shaft and a B-side half shaft; the A-side half shaft and the B-side half shaft are fixedly connected with the differential respectively, and the differential transmits power to the outside; each two-gear power assembly comprises a driving motor assembly, a front planet row assembly, a rear planet row assembly and a gear shifting planet row assembly which are coaxially arranged; one group of two-gear power components are located at the corresponding positions of the A-side half shafts to form an A-side power component, and the other group of two-gear power components are located at the corresponding positions of the B-side half shafts to form a B-side power component.

Description

Multi-gear coaxial electric drive bridge structure
Technical Field
The invention relates to the technical field of drive axle structures, in particular to a multi-gear coaxial electric drive axle structure.
Background
In the electric drive axle structure in the prior art, electric power is interrupted during gear shifting, and the risk of sliding on a ramp is caused; in the electric drive bridge with few uninterrupted gear shifting power, the mass distribution of the electric drive bridge assembly is uneven relative to the position of the half shaft, so that the stress and the vibration are poor; and the structure of the existing electric drive bridge structure is complex, so that the whole vehicle is difficult to arrange.
Disclosure of Invention
Aiming at the problems, the invention provides a multi-gear coaxial electric drive bridge structure, which is coaxially arranged in all arrangements, has small volume, compact structure, simple whole vehicle arrangement, reasonable mass distribution of a power assembly of the electric drive bridge, and coaxial theoretical mass center and an axle housing axis, and greatly improves the stress and vibration conditions.
The utility model provides a coaxial electric bridge construction of many grades which characterized in that, it includes:
the differential assembly comprises a differential, an A-side half shaft and a B-side half shaft; the side A half shaft and the side B half shaft are fixedly connected with the differential respectively, and the differential transmits power to the outside;
each secondary power assembly comprises a driving motor assembly, a front planet row assembly, a rear planet row assembly and a gear shifting planet row assembly which are coaxially arranged;
one group of two-gear power assemblies are positioned at the corresponding positions of the A-side half shafts to form A-side power assemblies, and the other group of two-gear power assemblies are positioned at the corresponding positions of the B-side half shafts to form B-side power assemblies;
each two-gear power component comprises a driving motor component, a front planet row component, a rear planet row component, a gear shifting planet row component and a gear shifting component which are coaxially arranged, wherein the front planet row component comprises a front sun gear, a front planet gear, a front inner gear ring and a front planet carrier; the rear planet row component comprises a rear sun gear, a rear planet gear, a rear inner gear ring and a rear planet carrier; the gear shifting planet row component comprises a gear shifting row sun gear, a gear shifting row planet gear, a gear shifting row inner gear ring and a gear shifting row planet carrier; the gear shifting assembly comprises an inner gear ring gear hub, a gear shifting sliding sleeve, fixed combination teeth and planet carrier combination teeth;
the driving motor assembly is sleeved on the corresponding half shaft, and a front row sun gear shaft corresponding to the front row sun gear is coaxially sleeved on the corresponding half shaft; the front row planet carrier and the rear row planet carrier are sequentially sleeved on the corresponding half shafts, the gear shifting row planet carrier is fixedly connected to the corresponding side of the differential mechanism,
the planet carrier combination teeth are further arranged on the periphery of the outer ring of the planet carrier of the gear shifting row, which is far away from the differential mechanism, the outer ring of the inner gear ring of the gear shifting row is fixedly connected with an inner gear ring gear hub, and the gear shifting sliding sleeve axially moves to switch gears;
the gear shifting row planet carrier is fixedly connected with a differential mechanism; and the inner gear ring of the gear shifting row is fixedly connected with the electric drive axle housing.
It is further characterized in that:
the A-side power assembly and the B-side power assembly are symmetrically arranged relative to a median vertical plane of the differential assembly;
the front-row sun wheel shaft is of a hollow structure, and is an output shaft of the driving motor assembly;
an inner spline is arranged in the inner gear ring gear hub, an outer spline is arranged on the fixed combination gear, an outer spline is arranged on the planet carrier combination gear, splines are uniformly distributed on the inner ring surface and the outer ring surface of the shifting sliding sleeve, the outer spline on the shifting sliding sleeve is matched with the inner spline on the inner gear ring gear hub and slides axially, and through sliding, the inner spline on the shifting sliding sleeve is in splined connection with the outer spline on the fixed combination gear or the outer spline on the planet carrier combination gear; the fixed combination teeth are fixedly connected with the electric drive axle housing;
the gear shifting row planetary gears are sleeved on a convex planetary shaft which is far away from the differential mechanism and on the gear shifting row planetary frame through bearings, and the gear shifting row planetary gears are respectively in meshed connection with the gear shifting row inner gear ring and the gear shifting row sun gear through gears;
the corresponding half shaft passes through the front row sun gear shaft, and the front row sun gear is fixedly connected to the front row sun gear shaft; the rear end of the front row planet carrier is a hollow shaft, the rear end of the hollow shaft is fixedly connected with a rear row sun gear, and the corresponding half shaft penetrates through the hollow shaft of the hollow front row planet carrier to be arranged.
After the invention is adopted, the electric drive axle comprises the differential mechanism component and two coaxial second-gear power components which are the same, are arranged in a bilateral symmetry way, and are all arranged coaxially, so that the electric drive axle has the advantages of small volume, compact structure, simple whole vehicle arrangement, reasonable mass distribution of the power assembly of the electric drive axle, coaxial theoretical mass center and axle housing axis, and greatly improves the stress and vibration conditions.
Drawings
FIG. 1 is a schematic structural framework of the present invention;
the names corresponding to the numbers in the figure are as follows:
an A-side motor shaft 1, an A-side front row sun gear 2, an A-side front row planet gear 3, an A-side front row ring gear 4, an A-side rear row sun gear 5, an A-side rear row planet gear 6, an A-side rear row ring gear 7, an A-side shift row sun gear 8, an A-side shift row planet gear 9, an A-side shift row ring gear 10, a B-side shift row sun gear 11, a B-side shift row planet gear 12, a B-side shift row ring gear 13, a B-side rear row sun gear 14, a B-side rear row planet gear 15, a B-side rear row ring gear 16, a B-side motor shaft 17, a B-side front row sun gear 18, a B-side front row planet gear 19, a B-side front row ring gear 20, a B-side half shaft 21, a B-side rotor 22, a B-side stator 23, a B-side front row planet carrier 24, a B-side rear row planet carrier 25, a B-side fixed combination tooth 26, a B-side shift sliding sleeve 27, a B-side planet hub 28, a B-side planet carrier combination tooth 29, and a B-side shift row planet carrier 30, the gear shifting mechanism comprises a differential 31, an A-side shifting row planet carrier 32, A-side planet carrier combination teeth 33, an A-side annular gear hub 34, an A-side shifting sliding sleeve 35, A-side fixed combination teeth 36, an A-side rear row planet carrier 37, an A-side front row planet carrier 38, an A-side rotor 39, an A-side stator 40 and an A-side half shaft 41.
Detailed Description
A multiple-gear coaxial electric drive bridge structure, see fig. 1, comprising: the differential 31 assembly and two identical secondary power assemblies which are symmetrically arranged left and right; each secondary power assembly comprises a driving motor assembly, a front planet row assembly, a rear planet row assembly and a gear shifting planet row assembly which are coaxially arranged;
the two power assemblies arranged on the left and the right are the same, the power assembly on the A side is arranged on the left side of the differential 31, and the power assembly on the B side is arranged on the right side of the differential 31;
the A side driving motor assembly comprises a stator, a rotor and a motor shaft which are coaxially arranged, and the motor shaft is fixedly connected with the rotor;
the A-side front planet carrier assembly comprises an A-side front sun gear 2, an A-side front planet gear 3, an A-side front ring gear 4 and an A-side front planet carrier 38; the A-side front row planet gear 3 is sleeved on a planet shaft on the A-side front row planet carrier 38 through a bearing, and the A-side front row planet gear 3 is respectively connected with the A-side front row annular gear 4 and the A-side front row sun gear 2 through gear engagement; the front-row inner gear ring 4 on the side A is fixedly connected with an electric drive axle housing;
the A side rear planet row assembly comprises an A side rear sun gear 5, an A side rear planet gear 6, an A side rear ring gear 7 and an A side rear planet carrier 37; the A side rear row planetary gear 6 is sleeved on a planetary shaft on the A side rear row planetary carrier 37 through a bearing, and the A side rear row planetary gear 6 is respectively connected with the A side rear row inner gear ring 7 and the A side rear row sun gear 5 through gear engagement; the inner gear ring 7 of the back row at the side A is fixedly connected with the electric drive axle housing;
the A-side shifting planet row assembly comprises an A-side shifting row sun gear 8, an A-side shifting row planet gear 9, an A-side shifting row ring gear 10 and an A-side shifting row planet carrier 32; the A-side shifting row planetary gear 9 is sleeved on a planetary shaft on the A-side shifting row planetary frame 32 through a bearing, and the A-side shifting row planetary gear 9 is respectively connected with the A-side shifting row annular gear 10 and the A-side shifting row sun gear 8 through gear engagement;
the A-side 1/2-gear shifting assembly comprises an A-side annular gear hub 34, an A-side shifting sliding sleeve 35, A-side fixed combination teeth 36 and A-side planet carrier combination teeth 33; an internal spline is arranged in the gear hub 34 of the inner gear ring on the A side, an external spline is arranged on the fixed combination gear, an external spline is arranged on the gear hub 33 of the planet carrier on the A side, splines are evenly distributed on the inner side and the outer side of the gear shifting sliding sleeve 35 on the A side, the external spline on the gear shifting sliding sleeve 35 on the A side is matched with the internal spline on the gear hub 34 of the inner gear ring on the A side and can axially slide on the gear shifting sliding sleeve 35 on the A side, and through sliding, the internal spline on the gear shifting sliding sleeve 35 on the A side can be in splined connection with the external spline on the fixed combination gear 36 on the A side or the external spline on the gear hub 33 of the planet carrier on the A side; the side A fixed combination teeth 36 are fixedly connected with the electric drive axle housing;
a differential 31 assembly comprising a differential 31, a-side half shafts 41, B-side half shafts 21; the A side half shaft 41 and the B side half shaft 21 are fixedly connected with the differential 31, and the differential transmits power to the outside;
the front row sun gear 2 at the A side is fixedly sleeved on the motor shaft 1 at the A side; the A side rear row sun gear 5 is fixedly sleeved on the A side front row planet carrier 38 shaft; the sun gear 8 of the shift row at the side A is fixedly sleeved on the planet carrier 37 shaft at the rear row at the side A; the planet carrier 32 of the shift row at the A side is fixedly connected with the differential 31;
the side A motor shaft 1 is hollow, the side A front row planet carrier 38 shaft is hollow, the side A rear row planet carrier 37 shaft is hollow, and the side A gear shifting row planet carrier 32 shaft is hollow;
the A-side half shaft penetrates through the A-side motor shaft 1, the A-side front row planet carrier 38 shaft, the A-side rear row planet carrier 37 shaft and the A-side gear shifting row planet carrier 32 shaft and is coaxially arranged with the A-side motor shaft.
The B-side power assembly is arranged similarly, and specifically comprises the following components:
the side B driving motor assembly comprises a stator, a rotor and a motor shaft which are coaxially arranged, and the motor shaft is fixedly connected with the rotor;
the B-side front planet carrier assembly comprises a B-side front sun gear 18, a B-side front planet gear 19, a B-side front ring gear 20 and a B-side front planet carrier 24; the B-side front row planet gear 19 is sleeved on a planet shaft on the B-side front row planet carrier 24 through a bearing, and the B-side front row planet gear 19 is respectively connected with the B-side front row annular gear 20 and the B-side front row sun gear 18 through gear engagement; the inner gear ring 20 of the front row on the side B is fixedly connected with the electric drive axle housing;
the B-side rear planet row assembly comprises a B-side rear sun gear 14, a B-side rear planet gear 15, a B-side rear ring gear 16 and a B-side rear planet carrier 25; the B-side rear row planetary gear 15 is sleeved on a planetary shaft on the B-side rear row planetary carrier 25 through a bearing, and the B-side rear row planetary gear 15 is respectively connected with the B-side rear row inner gear ring 16 and the B-side rear row sun gear 14 through gear engagement; the inner gear ring 16 of the back row on the B side is fixedly connected with the shell of the electric drive axle;
the B-side shifting planet row assembly comprises a B-side shifting sun gear 11, a B-side shifting planet gear 12, a B-side shifting inner gear ring 13 and a B-side shifting planet carrier 30; the B-side shifting row planetary gear 12 is sleeved on a planetary shaft on the B-side shifting row planetary frame 30 through a bearing, and the B-side shifting row planetary gear 12 is respectively connected with the B-side shifting row inner gear ring 13 and the B-side shifting row sun gear 11 through gear engagement;
the B-side 1/2-gear shifting assembly comprises a B-side annular gear hub 28, a B-side shifting sliding sleeve 27, B-side fixed combination teeth 26 and B-side planet carrier combination teeth 29; an internal spline is arranged in the B-side internal gear ring gear hub 28, an external spline is arranged on the fixed combination gear, an external spline is arranged on the B-side planet carrier combination gear 29, splines are evenly distributed on the inner side and the outer side of the B-side shifting sliding sleeve 27, the external spline on the B-side shifting sliding sleeve 27 is matched with the internal spline on the B-side internal gear ring gear hub 28 and can axially slide on the B-side shifting sliding sleeve 27, and through sliding, the internal spline on the B-side shifting sliding sleeve 27 can be in splined connection with the external spline on the B-side fixed combination gear 26 or the external spline on the B-side planet carrier combination gear 29; the B side fixed combination teeth 26 are fixedly connected with the electric drive axle housing;
the B-side half shaft 21 is fixedly connected with the differential 31, and the differential transmits power to the outside;
the B side front row sun gear 18 is fixedly sleeved on the B side motor shaft 17; the B side rear row sun gear 14 is fixedly sleeved on the B side front row planet carrier 24 shaft; the B side gear shifting row sun gear 11 is fixedly sleeved on a B side rear row planet carrier 25 shaft; the B side shifting row planet carrier 30 is fixedly connected with a differential 31;
the B-side motor shaft 17 is hollow, the B-side front row planet carrier 24 is hollow, the B-side rear row planet carrier 25 is hollow, and the B-side gear shifting row planet carrier 30 is hollow;
the B-side half shaft 21 passes through the B-side motor shaft 17, the shaft of the B-side front row planet carrier 24, the shaft of the B-side rear row planet carrier 25 and the shaft of the B-side shift row planet carrier 30 and is arranged coaxially with the B-side motor shaft.
The utility model provides a coaxial electricity of many grades of drives axle structure, includes that differential mechanism 31 subassembly and two are the same, bilateral symmetry arrange, coaxial two keep off power component, and all arrange all coaxial arrangement of it, small, compact structure, whole car arrange simply, and electricity drives axle power assembly mass distribution reasonable, and theoretical barycenter is coaxial with the axle housing axis, has greatly improved atress and vibration situation.
The working principle is as follows:
the multi-gear coaxial electric drive axle structure comprises a differential mechanism 31 assembly and two coaxial second-gear power assemblies which are the same and are arranged in a bilateral symmetry mode, wherein each second-gear power assembly comprises a gear shifting assembly; two keep off power component and combine two gear shifting components can realize single 1 fender, single 2 fender, coupling 1+1 fender, coupling 2+2 fender etc. when single 1 keeps off and switches into single 2 keeps off, and power does not break.
Singly 1 keep off and singly 2 keep off and can be accomplished by one of them two power component, and the left side keeps off power component or the right side keeps off power component all can, and this place keeps off power component explanation with the left side:
when the single gear is 1, the B-side shifting sliding sleeve 27 is kept still at a neutral position, the A-side shifting sliding sleeve 35 in the A-side shifting assembly slides leftwards to engage, and the annular gear 10 of the A-side shifting row is connected with the fixed combination gear 36 of the A-side, so that the annular gear 10 of the A-side shifting row is fixed;
at this time, the a-side driving motor serves as a power source to drive the a-side rotor 39 and the a-side motor shaft 1 to rotate, so that power is transmitted to the a-side front sun gear 2, the a-side front planet gear 3 is driven to rotate and revolve around the a-side front sun gear 2 through gear engagement, and the a-side front planet carrier 38 is driven to rotate, then the power is further transmitted to the a-side rear sun gear 5 fixedly connected with the a-side front planet carrier 38, the a-side rear planet gear 6 is driven to rotate and revolve around the a-side rear sun gear 5 through gear engagement, and the a-side rear planet carrier 37 is driven to rotate, then the power is transmitted to the a-side shift sun gear 8, the a-side shift planet gear 9 is driven to rotate and revolve around the a-side shift sun gear 8 through gear engagement, and the a-side shift planet carrier 32 is driven to rotate, and finally, the power is transmitted to the outside through the differential 31 fixedly connected with the a-side shift planet carrier 32 and the B-side 41, so that the transmission of a half-shaft power flow is completed; in the process, the initial torque of the side A driving motor is amplified through the gear ratio designed in the first gear and then transmitted to the outside, so that the speed reduction and torque increase are realized;
when the single gear is 2, the B-side shifting sliding sleeve 27 is kept at a neutral position, the A-side shifting sliding sleeve 35 in the A-side shifting assembly slides rightwards to engage, the inner gear ring 10 of the A-side shifting row is connected with the combining gear 33 of the A-side planet carrier, and the inner gear ring, the planet carrier and the sun gear run at the same rotating speed due to the inherent characteristic of planet row transmission;
at this time, the a-side driving motor is used as a power source to drive the a-side rotor 39 and the a-side motor shaft 1 to rotate, so as to transmit power to the a-side front-row sun gear 2, drive the a-side front-row planet gear 3 to rotate and revolve around the a-side front-row sun gear 2 through gear engagement, further drive the a-side front-row planet carrier 38 to rotate, then further transmit power to the a-side rear-row sun gear 5 fixedly connected with the a-side front-row planet carrier 38, drive the a-side rear-row planet gear 6 to rotate and revolve around the a-side rear-row sun gear 5 through gear engagement, further drive the a-side rear-row planet carrier 37 to rotate, then transmit power to the a-side shift row sun gear 8, drive the whole planet row to rotate through gear engagement, namely drive the a-side shift row planet carrier 32 to rotate, and finally transmit power to the outside through the a-side half shaft 41 and the B-side half shaft 21 through the differential 31 fixedly connected with the a-side shift row planet carrier 32, thereby completing transmission of the secondary power flow; in the process, the initial torque of the side A driving motor is amplified through the gear ratio designed in the second gear and then transmitted to the outside, so that the speed reduction and torque increase are realized;
when high-power operation is required, the left power assembly and the right power assembly can work simultaneously, and the power requirement is met by using the coupling gear. The coupling 1 gear +1 gear and the coupling 2 gear +2 gear can be completed by two gear power components, the principle is similar, and the coupling 1 gear +1 gear is explained here:
when the coupling is in the gear position 1+1, the side A shifting sliding sleeve 35 in the side A shifting assembly slides leftwards to engage, and the side A shifting row annular gear 10 is connected with the side A fixed combination gear 36, so that the side A shifting row annular gear 10 is fixed; meanwhile, a B-side shifting sliding sleeve 27 in the B-side shifting assembly slides rightwards to engage, and the B-side shifting row ring gear 13 is connected with a B-side fixed combination gear 26, so that the B-side shifting row ring gear 13 is fixed;
at this time, the a-side drive motor serves as a power source to drive the a-side rotor 39 and the a-side motor shaft 1 to rotate, and further drives the a-side front sun gear 2, the a-side front planet carrier 38, the a-side rear sun gear 5, the a-side rear planet carrier 37, the a-side shift sun gear 8, and the a-side shift planet carrier 32 to rotate, and then power is transmitted to the differential 31; meanwhile, the B-side driving motor is used as a power source to drive the B-side rotor 22 and the B-side motor shaft 17 to rotate, further drive the B-side front row sun gear 18, the B-side front row planet carrier 24, the B-side rear row sun gear 14, the B-side rear row planet carrier 25, the B-side shift row sun gear 11 and the B-side shift row planet carrier 30 to rotate, and then transmit power to the differential 31; at this time, the power combination realized by the power assemblies on the left and right sides on the differential 31 is finally transmitted to the outside through the a-side half shaft 41 and the B-side half shaft 21, and the transmission of the power flow with the coupling of 1+1 gear is completed; in the process, the side A driving motor and the side B driving motor simultaneously amplify initial torque through a gear ratio designed in a first gear and then transmit the amplified initial torque to the outside, so that speed reduction and torque increase are realized;
the principle of uninterrupted power of the 1-gear upshift and the 2-gear downshift is the same as that of uninterrupted power of the 2-gear downshift, and the 1-gear upshift and the 2-gear downshift are taken as an example for explanation:
when the single gear 1 works, the A-side shifting sliding sleeve 35 in the A-side shifting assembly slides leftwards to engage, and the annular gear 10 of the A-side shifting row is connected with the A-side fixed combination gear 36, so that the annular gear 10 of the A-side shifting row is fixed; the a-side driving motor is used as a power source to drive the a-side rotor 39 and the a-side motor shaft 1 to rotate, further drive the a-side front row sun gear 2, the a-side front row planet carrier 38, the a-side rear row sun gear 5, the a-side rear row planet carrier 37, the a-side shift row sun gear 8 and the a-side shift row planet carrier 32 to rotate, and then power is transmitted to the differential 31 and transmitted to the outside through the a-side half shaft 41 and the B-side half shaft 21.
When the single 2-gear needs to be switched, the power transmission state of the single 1-gear on the a side is kept unchanged, and the shift sliding sleeve 27 on the B side slides to the left to engage, so that the driving motor on the B side is used as a power source to drive the rotor 22 on the B side and the motor shaft 17 on the B side to rotate, further drive the sun gear 18 on the front row on the B side, the planet carrier 24 on the front row on the B side, the sun gear 14 on the rear row on the B side, the planet carrier 25 on the rear row on the B side, the sun gear 1111 on the shift row on the B side and the planet carrier 30 on the shift row on the B side to rotate, and then the power is transmitted to the differential 31 and transmitted to the outside through the half shaft 41 on the a side and the half shaft 21 on the B side.
At the moment, the single 1-gear power driven by the A-side driving motor assembly and the single 2-gear power driven by the B-side driving motor assembly are output simultaneously, the A-side shifting sliding sleeve 35 in the A-side shifting assembly retracts to a neutral gear, the A-side single 1-gear power is disconnected, the output power of the B-side single 2-gear power is kept unchanged, namely the output power of the half shaft is not interrupted, and the process of switching the 1-gear power-free interruption to the 2-gear power is completed.
A multi-gear coaxial electric drive bridge structure has the advantages that the gear shifting power is not interrupted, the driving feeling is improved, and the ramp vehicle sliding risk is avoided; and the gear expansion mode is rich, the electric drive bridge is suitable for various working conditions, and the overall energy consumption of the electric drive bridge is low.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects 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.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (6)

1. The utility model provides a coaxial electric bridge construction of many grades which characterized in that, it includes:
the differential assembly comprises a differential, an A-side half shaft and a B-side half shaft; the A-side half shaft and the B-side half shaft are fixedly connected with the differential respectively, and the differential transmits power to the outside;
each secondary power assembly comprises a driving motor assembly, a front planet row assembly, a rear planet row assembly and a gear shifting planet row assembly which are coaxially arranged;
one group of two-gear power assemblies are positioned at the corresponding positions of the A-side half shafts to form A-side power assemblies, and the other group of two-gear power assemblies are positioned at the corresponding positions of the B-side half shafts to form B-side power assemblies;
each group of secondary power assemblies comprises a driving motor assembly, a front planet row assembly, a rear planet row assembly, a gear shifting planet row assembly and a gear shifting assembly which are coaxially arranged, wherein the front planet row assembly comprises a front row sun gear, a front row planet gear, a front row inner gear ring and a front row planet carrier; the rear planet row component comprises a rear sun gear, a rear planet gear, a rear inner gear ring and a rear planet carrier; the gear shifting planet row component comprises a gear shifting row sun gear, a gear shifting row planet gear, a gear shifting row inner gear ring and a gear shifting row planet carrier; the gear shifting assembly comprises an inner gear ring gear hub, a gear shifting sliding sleeve, fixed combination teeth and planet carrier combination teeth;
the driving motor assembly is sleeved on the corresponding half shaft arrangement, and a front row sun gear shaft corresponding to the front row sun gear is coaxially sleeved on the corresponding half shaft arrangement; the front row planet carrier and the rear row planet carrier are sequentially sleeved on the corresponding half shafts, the gear shifting row planet carrier is fixedly connected to the corresponding side of the differential mechanism,
the planet carrier combination teeth are further arranged on the periphery of the outer ring of the planet carrier of the gear shifting row, which is far away from the differential mechanism, the outer ring of the inner gear ring of the gear shifting row is fixedly connected with an inner gear ring gear hub, and the gear shifting sliding sleeve axially moves to switch gears;
the planet carrier of the gear shifting row is fixedly connected with the differential mechanism; and the inner gear ring of the gear shifting row is fixedly connected with the electric drive axle housing.
2. The multi-gear coaxial electric drive bridge structure of claim 1, wherein: the A-side power assembly and the B-side power assembly are symmetrically arranged about a median vertical plane of the differential assembly.
3. The multi-gear coaxial electric drive bridge structure of claim 1, wherein: the front row sun wheel shaft is of a hollow structure, and the front row sun wheel shaft is an output shaft of the driving motor assembly.
4. The multi-gear coaxial electric drive bridge structure of claim 1, wherein: an inner spline is arranged in the inner gear ring gear hub, an outer spline is arranged on the fixed combination gear, an outer spline is arranged on the planet carrier combination gear, splines are uniformly distributed on the inner ring surface and the outer ring surface of the shifting sliding sleeve, the outer spline on the shifting sliding sleeve is matched with the inner spline on the inner gear ring gear hub and slides axially, and through sliding, the inner spline on the shifting sliding sleeve is in splined connection with the outer spline on the fixed combination gear or the outer spline on the planet carrier combination gear; the fixed combination teeth are fixedly connected with the electric drive axle housing.
5. The multi-gear coaxial electric drive bridge structure of claim 1, wherein: the gear shifting row planetary gear is arranged on a convex planetary shaft which is far away from the differential mechanism and on the gear shifting row planetary frame through a bearing sleeve, and the gear shifting row planetary gear is respectively connected with the gear shifting row inner gear ring and the gear shifting row sun gear through gear engagement.
6. The multiple-gear coaxial electric drive bridge structure according to claim 1, wherein: the corresponding half shaft passes through the front row sun gear shaft, and the front row sun gear is fixedly connected to the front row sun gear shaft; the rear end of the front row planet carrier is a hollow shaft, the rear end of the hollow shaft is fixedly connected with a rear row sun gear, and the corresponding half shaft penetrates through the hollow shaft of the hollow front row planet carrier to be arranged.
CN202211267465.4A 2022-10-17 2022-10-17 Multi-gear coaxial electric drive bridge structure Pending CN115610219A (en)

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CN202211267465.4A CN115610219A (en) 2022-10-17 2022-10-17 Multi-gear coaxial electric drive bridge structure

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Application Number Priority Date Filing Date Title
CN202211267465.4A CN115610219A (en) 2022-10-17 2022-10-17 Multi-gear coaxial electric drive bridge structure

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CN115610219A true CN115610219A (en) 2023-01-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
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