CN115384304A - Multi-gear electric drive bridge structure - Google Patents

Multi-gear electric drive bridge structure Download PDF

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Publication number
CN115384304A
CN115384304A CN202211233686.XA CN202211233686A CN115384304A CN 115384304 A CN115384304 A CN 115384304A CN 202211233686 A CN202211233686 A CN 202211233686A CN 115384304 A CN115384304 A CN 115384304A
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CN
China
Prior art keywords
gear
shaft
teeth
row
input
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Pending
Application number
CN202211233686.XA
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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 CN202211233686.XA priority Critical patent/CN115384304A/en
Publication of CN115384304A publication Critical patent/CN115384304A/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)
  • Structure Of Transmissions (AREA)

Abstract

The invention provides a multi-gear electric drive axle structure, which has the advantages that the gear shifting power is not interrupted, the driving feeling is good, and the vehicle sliding risk is avoided; the mass distribution is reasonable, the mass center is close to the axle housing axis, the cantilever is short, and the stress and vibration conditions are greatly improved; the structure is compact, and the whole vehicle is simple in arrangement; the gear expansion mode is rich, the electric drive bridge is suitable for various complex working conditions, and the overall energy consumption of the electric drive bridge is low. It includes: the A side power input component; a B-side power input assembly; the front row planetary line assembly comprises a front row sun gear, a front row planetary gear, a front row annular gear and a front row planetary carrier; the three-gear shifting assembly comprises an inner gear ring gear hub, a shifting sliding sleeve, fixed combination teeth and planet carrier combination teeth; the rear row planetary gear assembly comprises a rear row sun gear, a rear row planetary gear, a rear row inner gear ring and a rear row planet carrier; a differential assembly comprising a differential, a left half shaft, and a right half shaft; the left half shaft and the right half shaft are fixedly connected with the differential respectively; and the front row sun wheel shaft assembly comprises a hollow front row sun wheel shaft and input constant meshing teeth.

Description

Multi-gear electric drive bridge structure
Technical Field
The invention relates to the technical field of drive axle structures, in particular to a multi-gear electric drive axle structure.
Background
Most of the existing multi-gear electric drive bridge structures have gear shifting power interruption, poor driving feeling and ramp vehicle sliding risk; partial gear shifting power does not interrupt the multi-gear electric drive bridge, and relative to the position of a half shaft, the mass distribution of a power assembly of the electric drive bridge is uneven, the distance between a mass center and the axis of an axle housing is far, and a cantilever is long, so that the stress and vibration conditions are poor; the structure is complex, and the whole vehicle is difficult to arrange; and the gear expansion mode is insufficient, and the integral energy consumption of the electric drive bridge is high.
Disclosure of Invention
Aiming at the problems, the invention provides a multi-gear electric drive axle structure, which has the advantages of uninterrupted gear shifting power, good driving feeling and no vehicle sliding risk; the mass distribution is reasonable, the mass center is close to the axle housing axis, the cantilever is short, and the stress and vibration conditions are greatly improved; the structure is compact, and the whole vehicle is simple in arrangement; the gear expansion mode is rich, the electric drive bridge is suitable for various complex working conditions, and the overall energy consumption of the electric drive bridge is low.
A multi-gear electric drive bridge structure is characterized by comprising:
the A-side power input assembly comprises an A-side driving motor, an A-side input shaft and A-side input teeth;
the B-side power input assembly comprises a B-side driving motor, a B-side input shaft, a coupling gear input tooth, a secondary coupling gear shifter and a secondary input tooth, wherein the B-side input shaft is sleeved with the coupling gear input tooth, the secondary coupling gear shifter and the secondary input tooth, the secondary coupling gear shifter is used for switching neutral gear, coupling gear or secondary gear, and the secondary input tooth is directly or indirectly connected with the secondary output tooth;
the front row planetary 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 three-gear shifting assembly comprises an inner gear ring gear hub, a shifting sliding sleeve, fixed combination teeth and planet carrier combination teeth;
the rear row planetary gear assembly comprises a rear row sun gear, a rear row planetary gear, a rear row inner gear ring and a rear row planet carrier;
a differential assembly comprising a differential, a left half shaft, and a right half shaft; the left half shaft and the right half shaft are fixedly connected with the differential respectively, and the differential transmits power to the outside;
the front row sun wheel shaft assembly comprises a hollow front row sun wheel shaft and input constant meshing teeth;
the output end of the front row sun gear shaft is connected with the front row sun gear, the output end of the front row planet carrier is fixedly provided with the two-gear output teeth and the rear row sun gear,
the power input assembly at the side A and the power input assembly at the side B are respectively positioned at two sides of one half shaft and are arranged in parallel, the positions at the two sides are specifically the positions at the front side and the rear side, and the front row of sun gear shafts are coaxially sleeved on one half shaft; the front-row planet carrier and the rear-row planet carrier are sequentially sleeved on one half shaft, planet carrier combination teeth are further arranged on the periphery of the outer ring of the front end of the front-row planet carrier, an inner ring gear hub is fixedly connected to the outer ring of the inner ring gear of the front row, and the shifting sliding sleeve axially moves to switch gears;
the input teeth at the A side are meshed and connected with the input constant mesh teeth, the input teeth of the coupling gear are meshed and connected with the input constant mesh teeth, and the rear row planet carrier is fixedly connected with the differential; and the rear row gear ring is fixedly connected with the electric drive axle housing.
It is further characterized in that:
the gear transmission mechanism further comprises a middle shaft assembly, wherein the middle shaft assembly is arranged between the two-gear input teeth and the two-gear output teeth;
the intermediate shaft assembly comprises an intermediate shaft, intermediate shaft two-gear teeth and intermediate shaft normally meshed teeth, the two ends of the intermediate shaft are fixedly sleeved with the intermediate shaft normally meshed teeth and the intermediate shaft two-gear teeth respectively, the intermediate shaft normally meshed teeth are meshed with the two-gear input teeth, and the intermediate shaft two-gear teeth are meshed with the two-gear output teeth;
the inner circumference of the gear hub of the inner gear ring is provided with an inner spline, the outer circumference of the fixed combination gear is provided with an outer spline, the outer circumference of the planet carrier combination gear is provided with an outer spline, splines are uniformly distributed on the inner and outer annular surfaces of the shift sliding sleeve, the outer spline on the shift sliding sleeve is matched with the inner spline on the gear hub of the inner gear ring and slides axially, and through sliding, the inner spline on the shift 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, so that gear switching is realized; the fixed combination teeth are fixedly connected with the electric drive axle housing;
the rear row planetary wheels are sleeved on a rear convex planetary shaft on the rear row planetary frame through a bearing, and are respectively in meshed connection with the rear row inner gear ring and the rear row sun gear through gears;
one half shaft passes through the front row sun gear shaft, and the input constant meshing teeth and the front row sun gear are 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, one half shaft penetrates through the hollow shaft of the hollow front-row planet carrier to be arranged, and the two-gear output gear is fixedly sleeved on the hollow shaft and is arranged between the front-row planet carrier and the rear-row planet carrier;
the front row planetary row assembly and the rear row planetary row assembly are arranged corresponding to the same half shaft;
wherein, the half shaft is a left half shaft or a right half shaft.
After the multi-gear electric drive bridge structure is adopted, the multi-gear electric drive bridge structure comprises two motors, two gear shifters, two planet rows and a plurality of groups of gears; the gear shifting power is not interrupted, and compared with the position of a half shaft, the mass distribution of the electric drive axle power assembly is reasonable, the mass center is close to the axle housing axis, and the cantilever is short, so that the stress and vibration conditions are greatly improved; the structure is compact, and the whole vehicle is simple in arrangement.
Drawings
FIG. 1 is a schematic of the structural framework of the present invention;
the names corresponding to the sequence numbers in the figure are as follows:
the gear shifting device comprises an A-side driving motor 1, an A-side input shaft 2, an A-side input gear 3, a fixed combination gear 4, a shifting sliding sleeve 5, an inner gear ring gear hub 6, planet carrier combination gear 7, a front row inner gear ring 8, a front row planet gear 9, a front row sun gear 10, a front row planet carrier 11, a rear row gear ring 12, a rear row planet gear 13, a rear row sun gear 14, a rear row planet carrier 15, a right half shaft 16, a differential 17, a secondary output gear 18, a secondary intermediate shaft gear 19, an intermediate shaft 20, a primary intermediate shaft meshing gear 21, a secondary input gear 22, a secondary coupling 23, a coupling gear input gear 24, a B-side input shaft 25, a B-side driving motor 26, an input primary meshing gear 27, a left half shaft 28 and a front row sun gear shaft 29.
Detailed Description
A multiple-gear electric drive bridge structure, see fig. 1, comprising:
the side A power input assembly comprises a side A driving motor 1, a side A input shaft 2 and a side A input gear 3 which are axially aligned, wherein the side A driving motor 1 and the side A input gear 3 are fixedly connected with the side A input shaft 2 respectively;
a B-side power input assembly which comprises a B-side driving motor 26, a B-side input shaft 25, a coupling gear input tooth 24, a secondary coupling gear shifter 23 and a secondary gear input tooth 22 which are axially arranged in alignment; the B-side driving motor 26 is fixedly connected with the B-side input shaft 25, the coupling gear input teeth 24 and the second gear input teeth 22 are sleeved on the B-side input shaft 25 through bearings, and the second coupling gear shifter 23 is fixedly connected with the B-side input shaft 25 and arranged between the coupling gear input teeth 24 and the second gear input teeth 22;
the intermediate shaft assembly comprises an intermediate shaft 20, and intermediate shaft constant meshing teeth 21 and intermediate shaft second gear teeth 19 which are fixedly connected to the intermediate shaft 20;
the power input assembly at the side A and the power input assembly at the side B are arranged in parallel and are arranged at the front side and the rear side of the left half shaft;
the middle shaft assembly and the power input assembly on the side B are arranged in parallel;
the front row planetary gear assembly comprises a front row sun gear 10, a front row planetary gear 9, a front row annular gear 8, a front row planetary carrier 11 and a three-gear shifting assembly, wherein the front row planetary gear 9 is sleeved on a planetary shaft on the front row planetary carrier 11 through a bearing, and the front row planetary gear 9 is respectively connected with the front row annular gear 8 and the front row sun gear 10 through gear engagement; the three-gear shifting assembly comprises an inner gear ring gear hub 6, a shifting sliding sleeve 5, fixed combination teeth 4 and planet carrier combination teeth 7; an inner spline is arranged on the inner periphery of a gear hub 6 of the inner gear ring, an outer spline is arranged on the outer periphery of the fixed combination gear 4, an outer spline is arranged on the outer periphery of a planet carrier combination gear 7, splines are uniformly distributed on the inner side and the outer side of the gear shifting sliding sleeve 5, the outer spline on the gear shifting sliding sleeve 5 is matched with the inner spline on the inner gear ring and can axially slide on the inner gear ring, and through sliding, the inner spline on the gear shifting sliding sleeve 5 can be in splined connection with the outer spline on the fixed combination gear 4 or the outer spline on the planet carrier combination gear 7, so that gear switching is realized; the fixed combination teeth 4 are fixedly connected with the electric drive bridge shell;
the rear row planetary gear assembly comprises a rear row sun gear 14, a rear row planetary gear 13, a rear row inner gear ring and a rear row planetary carrier 15; the rear row planetary gears 13 are sleeved on planetary shafts on the rear row planetary frame 15 through bearings, and the rear row planetary gears 13 are respectively in meshed connection with the rear row inner gear rings and the rear row sun gears 14 through gears; the rear row planet carrier 15 is fixedly connected with the differential 17; the rear row of gear rings 12 are fixedly connected with the electric drive axle housing;
a differential 17 assembly comprising a differential 17, a left axle shaft 28, a right axle shaft 16; the left half shaft 28 and the right half shaft 16 are fixedly connected with the differential 17 respectively, and the differential transmits power to the outside;
the front row sun gear shaft assembly comprises input constant meshing teeth 27, a front row sun gear shaft 29 and a front row sun gear 10; the front row sun gear shaft 29 is hollow, the left half shaft 28 passes through the front row sun gear shaft 29, the input constant mesh teeth 27 and the front row sun gear 10 are fixedly connected on the front row sun gear shaft 29; the input constant meshing teeth 27 are meshed with the side A input teeth 3 and the coupling gear input teeth 24 at the same time; the front row planet carrier 11 is connected with the rear row sun gear 14 through a rear end hollow shaft, a left half shaft 28 penetrates through the hollow shaft of the front row planet carrier 11, and a second gear output tooth 18 is fixedly sleeved on the shaft of the front row planet carrier 11 and is arranged between the front row planet carrier and the rear row planet carrier;
the second-gear output teeth 18 are meshed with the second-gear teeth 19 of the intermediate shaft; the constant meshing teeth 21 of the intermediate shaft are meshed with the second-gear input teeth 22.
The gear shifting mechanism comprises two motors, two gear shifting assemblies, two planet rows and a plurality of groups of gears; the gear shifting power is not interrupted, and compared with the position of a half shaft, the mass distribution of the power assembly of the electrically driven bridge is reasonable, the mass center is close to the axis of the axle housing, and the cantilever is short, so that the stress and vibration conditions are greatly improved; the structure is compact, and the whole vehicle arrangement is simple.
The working principle is as follows:
the multi-gear electric drive axle structure consists of two motors, two gear shifting assemblies, a plurality of gear assemblies, two planet rows and a differential assembly, wherein the two motors are arranged in parallel, the two planet rows and the differential assembly are coaxially arranged with a half shaft, the two motors and the two gear shifting assemblies are used in a combined mode in a different gear transmission mode, and further multi-gear with uninterrupted gear shifting power and different speed ratios is achieved.
During the first gear, the second coupling gear shifter 23 is kept in a neutral position and is kept still, the gear shifting sliding sleeve 5 in the first three-gear shifting assembly is shifted to the left, and the front-row annular gear 8 is connected with the fixed combination gear 4, so that the front-row annular gear 8 is fixed;
at this time, the a-side driving motor 1 serves as a power source to drive the a-side input shaft 2 and the a-side input teeth 3 to rotate, the a-side input teeth 3 further connect the power through meshing, transmit the power to the input constant mesh teeth 27, further transmit the power to the front row sun gear 10 through the front row sun gear shaft 29, drive the front row planet gears 9 to rotate and revolve around the front row sun gear 10 through gear meshing, further drive the front row planet carrier 11 to rotate, then transmit the power to the rear row sun gear 14, drive the rear row planet gears 13 to rotate and revolve around the rear row sun gear 14 through gear meshing, further drive the rear row planet carrier 15 to rotate, and finally transmit the power to the outside through the left half shaft 16 and the right half shaft 17 fixedly connected with the rear row planet carrier 15, thereby completing the transmission of the first-gear power flow; in the process, the initial torque of the side A driving motor 1 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;
during the second gear, the first-third gear shifting assembly is kept still at the neutral position, the second-coupling gear shifter 23 is shifted to the right, and the B-side input shaft 25 is connected with the second-gear input teeth 22;
at this time, the B-side driving motor 26 serves as a power source to drive the B-side input shaft 25 to rotate, so that power is transmitted to the second-gear input teeth 22 through the second-gear coupling shifter 23, the second-gear input teeth 22 further transmit the power to the intermediate shaft normally-engaged teeth 21 through meshing connection, so that the power is transmitted to the intermediate shaft 20 arranged in parallel with the B-side input shaft 25, the intermediate shaft 20 drives the intermediate shaft second-gear teeth 19 fixedly connected thereto to rotate, the intermediate shaft second-gear teeth 19 drives the second-gear output teeth 18 to rotate through meshing connection, so that the rear-row sun gear 14 fixedly sleeved thereon is driven to rotate by the front-row planet carrier 11, the rear-row planet gear 13 is driven to revolve around the rear-row sun gear 14 through gear meshing, so that the rear-row planet carrier 15 is driven to rotate, and finally, the power is transmitted to the outside through the left and right half shafts 16 through the differential 17 fixedly connected with the rear-row planet carrier 15, so that the transmission of the second-gear power flow is completed; in the process, the initial torque of the B-side driving motor 26 is amplified by the gear ratio of the second gear design and then transmitted to the outside, so that the speed reduction and torque increase are realized;
in the third gear, the second coupling gear shifter 23 is kept in a neutral position and is kept still, the gear shifting sliding sleeve 5 in the first three-gear shifting assembly is shifted to the right, the front-row inner gear ring 8 is connected with the planet carrier combined teeth 7, 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 carrier transmission;
at this time, the a-side driving motor 1 serves as a power source to drive the a-side input shaft 2 and the a-side input teeth 3 to rotate, the a-side input teeth 3 further transmit power to the input normally meshed teeth 27 through meshing connection, further transmit power to the front row sun gear 10 through the front row sun gear shaft 29, drive the whole planetary row to rotate through gear meshing, namely drive the front row planet carrier 11 to rotate, then transmit the power to the rear row sun gear 14, drive the rear row planet gear 13 to rotate and revolve around the rear row sun gear 14 through gear meshing, further drive the rear row planet carrier 15 to rotate, and finally transmit the power to the outside through the left half shaft 16 and the right half shaft 17 through the differential 17 fixedly connected with the rear row planet carrier 15, so as to complete the transmission of three-gear power flow; in the process, the initial torque of the side A driving motor 1 is amplified through the gear ratio designed by the third gear and then transmitted to the outside, so that the speed reduction and torque increase are realized;
when the vehicle shifts in succession, two driving motor cooperation assemblies of shifting can realize that the electricity drives the axle and shifts power and do not break off, switch to two if keep off, two keep off switch to three keep off or three keep off switch to two keep off, two keep off when switching to one keep off power and do not break off, keep off the gear and switch that the uninterrupted principle of power is the same, use one keep off to rise two and describe as the example:
when the electric drive axle is in the first gear, the second coupling gear shifter 23 is kept in the neutral position and is not moved, the gear shifting sliding sleeve 5 in the first three-gear shifting assembly is shifted to the left, and the front-row inner gear ring 8 is connected with the fixed combination gear 4, so that the front-row inner gear ring 8 is fixed; at the moment, the A-side driving motor 1 is used as a power source to drive the A-side input shaft 2, the A-side input teeth 3, the input constant mesh teeth 27, the front row sun gear 10, the front row planet carrier 11, the rear row sun gear 14 and the rear row planet carrier 15 to rotate, and finally, power is transmitted to the outside through a left half shaft and a right half shaft through a differential 17 fixedly connected with the rear row planet carrier 15;
when the gear needs to be switched to the second gear, the power transmission state of the first gear is kept unchanged, the second coupling gear shifter 23 is shifted to the right, and the B-side input shaft 25 is connected with the second gear input teeth 22; at this time, the B-side driving motor 26 serves as a power source to drive the B-side input shaft 25, the second coupling gear shifter 23, the second input gear 22, the intermediate shaft constant mesh gear 21, the intermediate shaft 20, the intermediate shaft second gear 19, the second output gear 18, the rear sun gear 14 and the rear planet carrier 15 to rotate, and finally, power is transmitted to the outside through the left half shaft and the right half shaft through the differential 17 fixedly connected with the rear planet carrier 15;
at the moment, the first gear power driven by the side A driving motor 1 and the second gear power driven by the side B driving motor 26 are output simultaneously, the shifting sliding sleeve 5 in the three-gear shifting assembly returns to the neutral gear to disconnect the first gear power, the second gear power is kept unchanged, namely the output power of the half shaft is not interrupted, and the process of switching the first gear to the second gear without power interruption is completed.
In addition, when the vehicle needs to output high power in the first gear or the third gear, the power of the B-side driving motor 26 can be combined with the power of the a-side driving motor 1 through the coupling gear to output at the speed ratio of the first gear or the third gear, and the principle of the first gear coupling is similar to that of the third gear coupling, which is explained by taking the first gear coupling as an example:
when the first gear is coupled, the driving motor 1 at the side A performs power transmission at the first gear, and the gear shifter 23 at the second gear is shifted to the left, so that the input shaft 25 at the side B is connected with the input gear 24 at the coupling gear; at this time, the rotary power of the B-side driving motor 26 is transmitted to the input constant mesh teeth 27 through the B-side input shaft 25 and the coupling gear input teeth 24 through meshing connection;
at the moment, the power of the B-side driving motor 26 is coupled with the power of the A-side driving motor 1 on the input constant mesh teeth 27; the power gathered together continuously drives the front row sun gear 10, the front row planet carrier 11, the rear row sun gear 14 and the rear row planet carrier 15 to rotate, and finally, the power is transmitted to the outside through a left half shaft and a right half shaft through a differential 17 fixedly connected with the rear row planet carrier 15, so that the power output of the first gear coupling is realized.
The multi-gear electric drive bridge structure ensures that power is not interrupted during gear switching, improves driving feeling and reduces the risk of sliding on the ramp; the gear expansion mode is rich, the electric drive bridge is suitable for various complex 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 (8)

1. A multi-gear electric drive bridge structure is characterized by comprising:
the A-side power input assembly comprises an A-side driving motor, an A-side input shaft and A-side input teeth;
the B-side power input assembly comprises a B-side driving motor, a B-side input shaft, a coupling gear input tooth, a secondary coupling gear shifter and a secondary input tooth, wherein the B-side input shaft is sleeved with the coupling gear input tooth, the secondary coupling gear shifter and the secondary input tooth, the secondary coupling gear shifter is used for shifting a neutral gear, a coupling gear or a secondary gear, and the secondary input tooth is directly or indirectly connected with the secondary output tooth;
the front row planetary 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 three-gear shifting assembly comprises an inner gear ring gear hub, a shifting sliding sleeve, fixed combination teeth and planet carrier combination teeth;
the rear row planet row assembly comprises a rear row sun gear, a rear row planet gear, a rear row inner gear ring and a rear row planet carrier;
a differential assembly comprising a differential, a left half shaft, and a right half shaft; the left half shaft and the right half shaft are fixedly connected with the differential respectively, and the differential transmits power to the outside;
the front row sun wheel shaft component comprises a hollow front row sun wheel shaft and input constant meshing teeth;
the output end of the front row sun gear shaft is connected with the front row sun gear, the output end of the front row planet carrier is fixedly provided with the two-gear output teeth and the rear row sun gear,
the power input assembly at the side A and the power input assembly at the side B are respectively positioned at two sides of one half shaft and are arranged in parallel, the positions at the two sides are specifically the positions at the front side and the rear side, and the front row of sun gear shafts are coaxially sleeved on one half shaft; the front-row planet carrier and the rear-row planet carrier are sequentially sleeved on one half shaft, planet carrier combination teeth are further arranged on the periphery of the outer ring of the front end of the front-row planet carrier, an inner ring gear hub is fixedly connected to the outer ring of the inner ring gear of the front row, and the shifting sliding sleeve axially moves to switch gears;
the input gear at the side A is meshed with the input constant mesh gear, the input gear of the coupling gear is meshed with the input constant mesh gear, and the rear row planet carrier is fixedly connected with the differential mechanism; and the rear row gear ring is fixedly connected with the electric drive axle housing.
2. A multiple-gear electric drive bridge structure as defined in claim 1, wherein: the transmission mechanism further comprises a middle shaft assembly, and the middle shaft assembly is arranged between the two-gear input teeth and the two-gear output teeth.
3. A multiple-speed electric drive bridge structure as defined in claim 2, wherein: the intermediate shaft assembly comprises an intermediate shaft, intermediate shaft two-gear teeth and intermediate shaft normally-meshed teeth, the intermediate shaft normally-meshed teeth and the intermediate shaft two-gear teeth are fixedly sleeved at two ends of the intermediate shaft respectively, the intermediate shaft normally-meshed teeth are meshed with the two-gear input teeth, and the intermediate shaft two-gear teeth are meshed with the two-gear output teeth.
4. A multiple-speed electric drive bridge structure as defined in claim 1, wherein: the inner circumference of the gear hub of the inner gear ring is provided with an inner spline, the outer circumference of the fixed combination gear is provided with an outer spline, the outer circumference of the planet carrier combination gear is provided with an outer spline, splines are uniformly distributed on the inner and outer annular surfaces of the shift sliding sleeve, the outer spline on the shift sliding sleeve is matched with the inner spline on the gear hub of the inner gear ring and slides axially, and through sliding, the inner spline on the shift 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, so that gear switching is realized; the fixed combination teeth are fixedly connected with the electric drive axle housing.
5. A multiple-gear electric drive bridge structure as defined in claim 1, wherein: the rear row planetary gears are sleeved on a rear convex planetary shaft on the rear row planetary frame through bearings, and are respectively in meshed connection with the rear row inner gear rings and the rear row sun gears through gears.
6. A multiple-gear electric drive bridge structure as defined in claim 1, wherein: one half shaft passes through the front row sun gear shaft, and the input constant meshing teeth and the front row sun gear are 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, one half shaft penetrates through the hollow shaft of the hollow front row planet carrier to be arranged, and the second gear output gear is fixedly sleeved on the hollow shaft and is arranged between the front row planet carrier and the rear row planet carrier.
7. A multiple-speed electric drive bridge structure as defined in claim 1, wherein: the front row planetary row assembly and the rear row planetary row assembly are arranged corresponding to the same half shaft.
8. A multiple-gear electric drive bridge structure as defined in claim 1, wherein: wherein, the half shaft is a left half shaft or a right half shaft.
CN202211233686.XA 2022-10-10 2022-10-10 Multi-gear electric drive bridge structure Pending CN115384304A (en)

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CN115384304A true CN115384304A (en) 2022-11-25

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