CN115384295A - New forms of energy truck keeps off more and drives bridge construction - Google Patents

New forms of energy truck keeps off more and drives bridge construction Download PDF

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Publication number
CN115384295A
CN115384295A CN202211200456.3A CN202211200456A CN115384295A CN 115384295 A CN115384295 A CN 115384295A CN 202211200456 A CN202211200456 A CN 202211200456A CN 115384295 A CN115384295 A CN 115384295A
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CN
China
Prior art keywords
gear
teeth
shaft
tooth
fixedly connected
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Pending
Application number
CN202211200456.3A
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Chinese (zh)
Inventor
李磊
戴恩虎
杨海华
王康林
祖厚友
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
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 CN202211200456.3A priority Critical patent/CN115384295A/en
Publication of CN115384295A publication Critical patent/CN115384295A/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
    • 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
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/12—Torque-transmitting axles
    • B60B35/14—Torque-transmitting axles composite or split, e.g. half- axles; Couplings between axle parts or sections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
    • B60K17/08—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • 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
    • 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
    • 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
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F16H37/0806—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with a plurality of driving or driven shafts
    • 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
    • F16H57/00—General details of gearing
    • F16H57/0006—Vibration-damping or noise reducing means specially adapted for gearings
    • 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
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
    • 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
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • 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
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02039—Gearboxes for particular applications
    • F16H2057/02043—Gearboxes for particular applications for vehicle transmissions
    • 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
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02086—Measures for reducing size of gearbox, e.g. for creating a more compact transmission casing
    • 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
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H2063/3093—Final output elements, i.e. the final elements to establish gear ratio, e.g. dog clutches or other means establishing coupling to shaft

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Structure Of Transmissions (AREA)

Abstract

The invention provides a multi-gear electric drive bridge structure of a new energy truck, which realizes power output by matching double motors with different speed ratios, and the motors fully work in a high-efficiency area. It comprises the following steps: two motors, specifically an EM-B motor and an EM-A motor; a set of reduction gear assemblies; a set of two-speed gear assemblies; the group of gear shifting planet row assemblies comprise main reduction teeth, a sun wheel shaft, a sun wheel, a planet carrier and a high-low gear shifting assembly, wherein the sun wheel shaft is a hollow shaft, the main reduction teeth are sleeved at the input end of the sun wheel shaft, and the sun wheel is fixedly sleeved at the output end of the sun wheel shaft; a differential mechanism; and the two half shafts are respectively a left half shaft and a right half shaft.

Description

New forms of energy truck keeps off more and drives bridge construction
Technical Field
The invention relates to the technical field of drive axle structures, in particular to a multi-gear electric drive axle structure of a new energy truck.
Background
The existing multi-gear electric drive bridge structure of a new energy truck has the advantages that gear modes are few, the utilization rate of a high-efficiency region of a motor is low during operation of the truck, neutral gear cannot be achieved during driving, rotation resistance of the motor cannot be eliminated, useless power loss can be caused, and the system is poor in power and low in efficiency.
The electric drive bridge with the partial gear shifting function has the advantages that the gear shifting part is a friction synchronizer, and the friction synchronizer is low in efficiency and poor in reliability; some electric drive bridges without friction synchronizers have too few gear modes; the electric drive axle has a gear shifting function, is free of a friction synchronizer and comprises different gears, the gear shifting and speed regulating are complex, secondary speed regulation is needed, the gear shifting time is long, the power interruption time is long, and the driving feeling is poor.
The existing double-motor new energy truck electric drive bridge product, particularly the engineering new energy truck electric drive bridge, is still provided with a wheel-side speed reducer, and has the advantages of multiple parts, large volume, complex structure and high cost.
Partial double-motor-driven bridge products are uneven in assembly mass distribution relative to the position of the half shaft, the distance between the mass center and the axis of the axle housing is far, and the cantilever is long, so that the stress and vibration conditions are poor.
Disclosure of Invention
Aiming at the problems, the invention provides a multi-gear electric drive bridge structure of a new energy truck, which is characterized in that double motors are matched with different speed ratios to realize power output, the motors fully work in a high-efficiency area, single-motor neutral gear and double-motor neutral gear can be realized, the dragging resistance of the motors under partial working conditions of a vehicle is reduced, and the system is strong in power and high in efficiency; the number of parts is small, the volume is small, the structure is compact, the whole vehicle arrangement is simple, and the cost is low; the barycenter is close to axle housing axis, and the cantilever is short, has greatly improved the atress and the vibration condition.
The utility model provides a new forms of energy truck keeps off more electric bridge construction, its characterized in that, it includes:
two motors, specifically an EM-B motor and an EM-A motor;
a set of reduction gear assemblies;
a set of two-speed gear assemblies;
the group of gear shifting planet row assemblies comprise main reduction teeth, a sun wheel shaft, a sun wheel, a planet carrier and a high-low gear shifting assembly, wherein the sun wheel shaft is a hollow shaft, the main reduction teeth are sleeved at the input end of the sun wheel shaft, and the sun wheel is fixedly sleeved at the output end of the sun wheel shaft;
a differential mechanism;
the two half shafts are respectively a left half shaft and a right half shaft;
the output end of the EM-B motor is connected with the input teeth of the reduction gear assembly, the output teeth of the reduction gear assembly are meshed with the main reduction teeth, a planet carrier is fixedly arranged on a shell of the differential, a plurality of planet wheels are annularly distributed at the positions, close to corresponding half shafts, of the planet carrier, an inner gear ring is annularly distributed on the outer circumference of each planet wheel, the planet wheels are respectively meshed with the inner gear ring and the sun wheel through gears, and the sun wheel is sleeved on one half shaft;
the gear shifting planet row assembly is coaxially arranged with the half shaft;
the high-low gear shifting assembly comprises an inner gear ring gear hub, a high-low gear shifting sliding sleeve, fixed combination teeth and planet carrier combination teeth, and the inner gear ring gear hub is arranged between the fixed combination teeth and the planet carrier combination teeth; the fixed combination teeth are fixedly connected with the electric drive axle housing and arranged towards the gear hub of the inner gear ring; the end part, far away from the differential, of the planet carrier is provided with planet carrier combination teeth which are arranged towards an inner gear ring gear hub, and the high-low gear shifting sliding sleeve moves axially to switch high and low gears;
the output end of the EM-A motor is connected with input teeth of the two-gear assembly, the two-gear assembly comprises a gear shifting sliding sleeve, output teeth of the two-gear assembly are meshed with the main reducing teeth, and the gear shifting sliding sleeve is used for performing two-gear and neutral gear switching operation;
the two motors are arranged in parallel and are arranged on the front side and the rear side of the half shaft.
It is further characterized in that:
the two motors are respectively arranged at two sides of an axial region between the corresponding main reducing gear and the sun gear, so that the mass center of the whole structure is relatively close to the differential mechanism;
the two-gear assembly comprises an A-side input shaft, an A-side input tooth, an A-side primary driven tooth, an A-side intermediate shaft, a first-gear driving tooth, a second-gear driving tooth, an A-side output shaft, a first-gear driven tooth, a first-gear combining tooth, a second-gear driven tooth, a second-gear combining tooth, a second-gear hub, a second-gear shifting sliding sleeve and an A-side tertiary driving tooth;
the right end of the input shaft at the side A is fixedly connected with the EM-A motor, and the left end of the input shaft at the side A is fixedly connected with the input teeth at the side A; the right end of the A side intermediate shaft is fixedly connected with the A side first-gear driving tooth, the left end of the A side intermediate shaft is fixedly connected with the A side first-gear driven tooth, and the middle of the A side intermediate shaft is fixedly connected with the A side second-gear driving tooth; the right end of the output shaft at the side A is provided with a first-gear driven tooth, the left end of the output shaft at the side A is fixedly connected with the third-stage driving tooth at the side A, and the middle of the output shaft at the side A is provided with a second-gear driven tooth; the first gear driven tooth and the second gear driven tooth are respectively sleeved on the A-side output shaft in a hollow manner through bearings; a second gear hub is fixedly connected with the output shaft at the side A and is arranged between the first gear driven tooth and the second gear driven tooth; the first gear combination teeth are fixedly connected with the first gear driven teeth and face a first second gear hub; the second-gear combination teeth are fixedly connected with the second-gear driven teeth and face the first-gear hub; the outer periphery of the first-gear hub and the second-gear hub is provided with an external spline, the inner periphery of the first-gear shifting sliding sleeve and the second-gear shifting sliding sleeve is provided with an internal spline, the first-gear and second-gear shifting sliding sleeves are sleeved on the first-gear and second-gear hubs through splines and can axially slide on the first-gear and second-gear hubs; the side A input teeth are meshed with the side A primary driven teeth, the first-gear driving teeth are meshed with the first-gear driven teeth, and the second-gear driving teeth are meshed with the second-gear driven teeth;
the reduction gear assembly comprises a B-side input shaft, B-side input teeth, B-side primary driven teeth, a B-side intermediate shaft and B-side secondary driving teeth; the right end of the B-side input shaft is fixedly connected with the EM-B motor, and the left end of the B-side input shaft is fixedly connected with the B-side input gear; the right end of the B side intermediate shaft is fixedly connected with the B side primary driven gear; the left end is fixedly connected with the B-side secondary driving tooth; the B-side input teeth are meshed and connected with the B-side primary driven teeth;
the inner spline on the high-low gear shifting sliding sleeve is matched with the inner spline on the inner gear ring gear hub and can axially slide on the high-low gear shifting sliding sleeve, and the inner spline on the high-low gear shifting sliding sleeve can be in spline connection with the outer spline on the fixed combination gear or the outer spline on the planet carrier combination gear through sliding;
the main reducing gear is meshed with the B-side secondary driving gear, and the main reducing gear is meshed with the A-side tertiary driving gear.
After the system is adopted, the dual motors are matched with different speed ratios to realize power output, the motors fully work in a high-efficiency area, single-motor neutral gear and dual-motor neutral gear can be realized, the dragging resistance of the motors under partial working conditions of a vehicle is reduced, and the system is strong in power and high in efficiency; the friction-free mechanical gear shifting is adopted, the gear shifting speed is simple, the gear shifting time is short, the reliability is high, the efficiency is high, the power interruption time is short, and the driving feeling is good; the planetary row assembly is connected with the differential mechanism to realize power output, the planetary row and the differential mechanism are coaxially arranged, the output power of the differential mechanism is directly connected to wheels through half shafts, and the wheel-edge-free speed reducer has the advantages of few parts, small volume, compact structure, simple whole vehicle arrangement and low cost; two motors are distributed on the front side and the rear side of the bridge, the planet row assemblies and the bridge are coaxially arranged, the electric drive bridge is reasonable in mass distribution, the mass center is close to the axle shaft of the axle housing, the cantilever is short, and the stress and the vibration condition are greatly improved.
Drawings
FIG. 1 is a schematic structural framework of the present invention;
the names corresponding to the sequence numbers in the figure are as follows:
the gear shifting device comprises a B-side input gear 1, a B-side input shaft 2, an EM-B motor 3, a fixed combination gear 4, a high-low gear shifting sliding sleeve 5, an inner gear hub 6, a planet carrier combination gear 7, an inner gear 8, a planet gear 9, a sun gear 10, a planet carrier 11, a differential 12, a right half shaft 13, a first-second gear shifting sliding sleeve 14, a first-second gear hub 15, a first-second gear combination gear 16, a second-second gear combination gear 17, a first-second gear driven gear 18, an EM-A motor 19, a first-second gear driving gear 20, a second-second gear driving gear 21, an A-side input gear 22, an A-side input shaft 23, an A-side intermediate shaft 24, an A-side first-stage driven gear 25, an A-side output shaft 26, an A-side third-stage driving gear 27, a second-second driven gear 28, a left half shaft 29, a sun gear shaft 30, a main reduction gear 31, a B-side intermediate shaft 32, a B-side second-stage driving gear 33 and a B-side first-stage driven gear 34.
Detailed Description
A new energy truck multi-gear electric drive axle structure, see fig. 1, which includes:
the two motors, a group of reduction gear assemblies, a group of two-gear assemblies, a group of shifting planet row assemblies, a differential mechanism 12 and two half shafts;
the two motors are specifically an EM-B motor 3 and an EM-A motor 19;
the group of gear shifting planet row components comprise main reduction teeth 31, a sun wheel shaft 30, a sun wheel 10, planet wheels 9, a planet carrier 11, an inner gear ring 8 and high-low gear shifting components, wherein the sun wheel shaft 30 is a hollow shaft, the input end of the sun wheel shaft 30 is sleeved with the main reduction teeth 31, and the output end of the sun wheel shaft 30 is fixedly sleeved with the sun wheel 10;
the output end of the EM-B motor 3 is connected with the input teeth of a reduction gear assembly, the output teeth of the reduction gear assembly are meshed with the main reduction teeth 31, a planet carrier 11 is fixedly arranged on a shell of the differential mechanism 12, a plurality of planet wheels 9 are annularly distributed on the planet carrier 11 close to corresponding half shafts, an inner gear ring 8 is annularly distributed on the outer circumference of each planet wheel 9, each planet wheel 9 is respectively meshed with the inner gear ring 8 and the sun wheel 10 through gears, and the sun wheel is sleeved on one of the half shafts;
the gear shifting planet row component is coaxially arranged with the half shaft;
the high-low gear shifting assembly comprises an inner gear ring gear hub 6, a high-low gear shifting sliding sleeve 5, a fixed combination tooth 4 and a planet carrier combination tooth 7, wherein the inner gear ring gear hub 6 is arranged between the fixed combination tooth 4 and the planet carrier combination tooth 7; the fixed combination teeth 7 are fixedly connected with the electric drive axle housing and are arranged towards the inner gear ring gear hub 6; the end part of the planet carrier 11 far away from the differential 12 is provided with planet carrier combination teeth 7 which are arranged towards an inner gear ring gear hub 6, and the high-low gear shifting sliding sleeve 5 moves axially to switch high and low gears;
the output end of the EM-A motor 19 is connected with the input teeth of the two-gear assembly, the two-gear assembly comprises a shifting sliding sleeve, the output teeth of the two-gear assembly are meshed with the main reducing teeth 31, and the shifting sliding sleeve is used for switching two gears and neutral gears;
the two motors are arranged in parallel and are arranged on the front side and the rear side of the half shaft.
In the specific implementation:
the reduction gear assembly and the two-gear assembly are arranged in parallel and are arranged on the front side and the rear side of the half shaft;
the reduction gear assembly specifically comprises a B-side input shaft 2, a B-side input tooth 1, a B-side primary driven tooth 33, a B-side intermediate shaft 32 and a B-side secondary driving tooth 33; the right end of the B-side input shaft 2 is fixedly connected with the EM-B motor 3, and the left end of the B-side input shaft is fixedly connected with the B-side input gear 1; the right end of the B side intermediate shaft 32 is fixedly connected with a B side primary driven tooth 33; the left end is fixedly connected with a B-side secondary driving tooth 33; the B-side input teeth 1 are meshed with the B-side primary driven teeth 33;
the two-gear assembly specifically comprises an A-side input shaft 23, an A-side input tooth 22, an A-side first-stage driven tooth 25, an A-side intermediate shaft 24, a first-gear driving tooth 20, a second-gear driving tooth 21, an A-side output shaft 26, a first-gear driven tooth 18, a first-gear combining tooth 16, a second-gear driven tooth 28, a second-gear combining tooth 17, a second-gear hub 15, a second-gear shifting sliding sleeve and an A-side third-stage driving tooth 27;
the right end of an A-side input shaft 23 is fixedly connected with the EM-A motor 19, and the left end of the A-side input shaft is fixedly connected with an A-side input gear 22; the right end of an A-side intermediate shaft 24 is fixedly connected with an A-side first-gear driving tooth 20, the left end of the A-side intermediate shaft is fixedly connected with an A-side first-gear driven tooth 25, and the middle of the A-side intermediate shaft is fixedly connected with an A-side second-gear driving tooth 21;
the right end of the A-side output shaft 26 is provided with a first-gear driven tooth 18, the left end of the A-side output shaft is fixedly connected with a third-stage driving tooth 27, and a second-gear driven tooth 28 is arranged in the middle of the A-side output shaft; the first gear driven tooth 18 and the second gear driven tooth 28 are respectively sleeved on the A-side output shaft 26 through bearings in an idle mode;
a second gear hub 15 is fixedly connected with the output shaft 26 at the side A and is arranged between the first gear driven tooth 18 and the second gear driven tooth 28; the first gear combination tooth 16 is fixedly connected with the first gear driven tooth 18 and faces the first second gear hub 15; the second-gear combining teeth 17 are fixedly connected with the second-gear driven teeth 28 and face the first-gear hub 15; an external spline is arranged on the outer periphery of the first-gear hub 15, an internal spline is arranged on the inner periphery of the first-gear shifting sliding sleeve, the first-gear shifting sliding sleeve is sleeved on the first-gear hub 15 through the spline, and the first-gear shifting sliding sleeve can axially slide on the first-gear hub 15;
the A-side input teeth 22 are in meshed connection with the A-side primary driven teeth 25, the first-gear driving teeth 20 are in meshed connection with the first-gear driven teeth 18, and the second-gear driving teeth 21 are in meshed connection with the second-gear driven teeth 28;
the gear shifting planet row component specifically comprises a main reduction gear 31, a sun gear shaft 30, a sun gear 10, a planet gear 9, a planet carrier 11 and a high-low gear shifting component, wherein the planet gear 9 is sleeved on a planet shaft on the planet carrier 11 through a bearing, and the planet gear 9 is respectively connected with an inner gear ring 8 and the sun gear 10 through gear engagement; the sun wheel shaft 30 is hollow, the right end is fixedly connected with the sun wheel 10, and the left end is fixedly connected with the main reducing tooth 31;
the high-low gear shifting component specifically comprises an inner gear ring gear hub 6, a high-low gear shifting sliding sleeve 5, fixed combination teeth 4 and planet carrier 11 combination teeth 7; the ring gear 8 and the hub 6 are arranged between the fixed combination teeth 4 and the planet carrier combination teeth 7; the fixed combination teeth 4 are fixedly connected with the electric drive axle housing and are arranged towards the inner gear ring gear hub 6; the planet carrier combined teeth 7 are fixedly connected with a planet carrier 11 and arranged towards the inner gear ring and the gear hub 6; an internal spline is arranged in the inner gear ring gear hub 6, an external spline is arranged on the fixed combination gear 4, an external spline is arranged on the planet carrier combination gear 7, splines are evenly distributed on the inner side and the outer side of the high-low gear shifting sliding sleeve 5, the external spline on the high-low gear shifting sliding sleeve 5 is matched with the internal spline on the inner gear ring gear hub 6 and can axially slide on the high-low gear shifting sliding sleeve, and through sliding, the internal spline on the high-low gear shifting sliding sleeve 5 can be in splined connection with the external spline on the fixed combination gear 4 or the external spline on the planet carrier combination gear 7;
the main reducing teeth 31 are in meshed connection with the B-side secondary driving teeth, and the main reducing teeth 31 are in meshed connection with the A-side tertiary driving teeth 27;
the differential case is fixedly connected with the planet carrier 11;
the right end of the left half shaft 29 passes through a hollow sun gear shaft 30 and is connected with the inside of the differential mechanism 12 through a spline, and the left end of the right half shaft 13 passes through a spline and is connected with the inside of the differential mechanism 12; the left end of the left half shaft 29 and the right end of the right half shaft 13 are directly connected with wheels.
In specific implementation, the two motors are respectively arranged in the axial two-side region between the corresponding main reduction tooth 31 and the sun gear 10, so that the whole structural mass center is relatively close to the differential 12.
The working principle is as follows:
two motors cooperate the removal of the sliding sleeve that shifts of second gear shift and high-low gear sliding sleeve to shift, can realize different gear drive combination uses, further the multi-gear mode of different velocity ratios.
Through the use of single and double motors, the gear engagement of the first-gear and second-gear shifting sliding sleeve 14 and the sliding gear engagement of the high-low gear shifting sliding sleeve 5, various different working modes are realized, the power transmission principles of the different working modes are similar, and the gear shifting and power transmission principles and advantages are explained by taking the following three working modes as examples.
The first working mode is a high-torque mode, when the first working mode works, the double motors are both involved in driving, the first-gear and second-gear shifting sliding sleeves 14 slide rightwards, and the first-gear and second-gear hubs 15 are connected with the same-gear combination teeth 16 through splines to realize first gear; and the high-low gear shifting sliding sleeve 5 slides leftwards, and the inner gear ring gear hub 6 is connected with the fixed combination gear 4 through a spline, so that the inner gear ring 8 is fixed and the low gear is realized.
Firstly, an EM-A motor 19 serves as a power source to drive an A-side input shaft 23 and an A-side input tooth 22 to rotate, the A-side input tooth 22 continues to transmit power to an A-side primary driven tooth 25 through meshing connection, the A-side intermediate shaft 24 and a primary driving tooth 20 fixedly connected with the A-side intermediate shaft are further driven to rotate, the primary driving tooth 20 drives a primary driven tooth 18 to rotate through meshing connection, a primary combining tooth 16, a secondary shifting sliding sleeve 14 and a secondary gear hub 15 are further driven to rotate, power is transmitted to an A-side output shaft 26 and an A-side tertiary driving tooth 27 fixedly connected with the A-side output shaft, and the A-side tertiary driving tooth 27 transmits rotary power to a main reducing tooth 31 through meshing connection;
meanwhile, the EM-B motor 3 is used as a power source to drive the B-side input shaft 2 and the B-side input gear 1 to rotate, the B-side input gear 1 continuously transmits power to the B-side primary driven gear 34 through meshing connection, the B-side intermediate shaft 32 and a B-side secondary driving gear 33 fixedly connected with the B-side intermediate shaft are further driven to rotate, and the B-side secondary driving gear 33 further transmits the rotating power to the driving reduction gear 31 through meshing connection;
at the moment, the power of the EM-B motor 3 and the power of the EM-A motor 19 are coupled on the main reduction gear 31, the power which is gathered together continuously transmits the power to the sun gear 10 through the front row sun gear shaft 30, the planet gear 9 is driven to rotate and revolve around the sun gear 10 through gear meshing, the gear ring is fixed at the moment, the planet carrier 11 is driven to rotate at a reduced speed, finally, the power is directly transmitted to the wheels through the left half shaft and the right half shaft through the differential mechanism 12 fixedly connected with the planet carrier 11, and the power flow transmission in the working mode is completed;
in the process, the initial torque of the motor EM-B is amplified by the reduction gear set and the gear shifting planetary row and then transmitted to wheels, so that the speed reduction and torque increase are realized; the initial torque of the motor EM-A is amplified by the two-gear set and the gear shifting planetary row and then transmitted to wheels, so that the speed reduction and torque increase are realized; the two motors work simultaneously, the torques are superposed, and the large-torque output is realized.
The second working mode is a low-torque single-motor working mode, and one state is taken as an example for explanation, when the planetary gear transmission device works, only the EM-B motor 3 participates in driving, the high-low gear shifting sliding sleeve 5 slides rightwards, and the inner gear ring gear hub 6 is connected with the planet carrier combination teeth 7 through splines, so that the inner gear ring 8 is fixedly connected with the planet carrier 11; meanwhile, the first-gear and second-gear shifting sliding sleeve 14 does not act on the first-gear and second-gear hub 15, is in a neutral gear state and is not connected with the combination gear all the time;
the EM-B motor 3 is used as a power source to drive the B-side input shaft 2 and the B-side input gear 1 to rotate, the B-side input gear 1 continuously transmits power to the B-side primary driven gear 34 through meshing connection, the B-side intermediate shaft 32 and a B-side secondary driving gear 33 fixedly connected to the B-side intermediate shaft are further driven to rotate, and the B-side secondary driving gear 33 further transmits the rotating power to the main reduction gear 31 through meshing connection; the main reducing gear 31 continuously transmits power to the sun gear 10 through the front row sun gear shaft 30, drives the planet gear 9 to rotate and revolve around the sun gear 10 through gear meshing, at the moment, the inner gear ring 8 is fixedly connected with the planet carrier 11, further drives the planet carrier 11 to rotate at the same rotating speed as the sun gear 10, and finally, the power is directly transmitted to the wheel through the differential 12 fixedly connected with the planet carrier 11 through the left half shaft and the right half shaft, so that the transmission of power flow in the second working mode is completed;
in the process, the first-gear and second-gear shifting sliding sleeve 14 is kept in a neutral gear state, the EM-A motor 19 is disconnected with the driving system, and drag resistance is not formed all the time;
the third working mode is a neutral gear sliding working condition of the vehicle, and at the moment, the high-low gear shifting sliding sleeve 5 does not act on the internal gear ring gear hub 6 and is in a neutral gear state and is not connected with the combination teeth all the time; at the moment, the shifting planetary gear train loses the power transmission effect, the EM-B motor 3 and the reduction gear set, and the EM-A motor 19 and the two-gear set are disconnected with the driving system, and the dragging resistance is not formed all the time.
In addition, when the first-gear and second-gear shifting sliding sleeve 14 and the high-low-gear shifting sliding sleeve 5 slide and shift gears, no friction part and no friction damage exist, and only the speed regulation and the gear shifting of the motor are needed; in addition, under partial working conditions, when the first-gear and second-gear shifting sliding sleeve 14 and the high-low-gear shifting sliding sleeve 5 are required to shift gears, secondary speed regulation is not required in the high-low-gear shifting process, and the speed regulation process can be simultaneously carried out when the first-gear and second-gear shifting sliding sleeve 14 and the high-low-gear shifting sliding sleeve 5 slide and shift gears; examples are as follows: the initial state is that the first-gear shifting sliding sleeve 14 is in the second-gear position sliding to the left, and the high-low gear shifting sliding sleeve 5 is in the low-gear position sliding to the left. When both the two shift gears are required to be shifted, firstly, the two-gear shifting sliding sleeve 14 slides rightwards to a neutral position, and meanwhile, the high-low gear shifting sliding sleeve 5 slides rightwards to the neutral position; then the speed regulation and the gear shifting are carried out simultaneously, the rotating speed of the same gear combining tooth 16 of the first and second gear shifting sliding sleeves 14 is driven to be within the designed speed difference range through the speed regulation of the EM-A motor 19, the right sliding is carried out to connect the same gear combining tooth 16 of the first and second gear shifting sliding sleeves 14, and the first gear is engaged; in synchronization with the above, the speed regulation of the EM-B motor 3 enables the rotating speed of the high-low gear shifting sliding sleeve 5 and the planet carrier combining teeth 7 to approach within the designed speed difference range, and the high-low gear shifting sliding sleeve 5 and the planet carrier combining teeth 7 are connected by sliding to the right, so that the high gear is engaged; in the process, two gear shifting pieces are used for simultaneously regulating the speed and shifting gears, secondary speed regulation is not needed, and the gear shifting time is shortened.
According to the multi-gear electric drive bridge structure of the new energy truck, the double motors are matched with different speed ratios to realize power output, the motors fully work in a high-efficiency area, single-motor neutral gear and double-motor neutral gear can be realized, the dragging resistance of the motors under partial working conditions of a vehicle is reduced, and the system is strong in power and high in efficiency;
the friction-free mechanical gear shifting is adopted, the gear shifting speed is simple, the gear shifting time is short, the reliability is high, the efficiency is high, the power interruption time is short, and the driving feeling is good;
the planetary row assembly is connected with the differential mechanism to realize power output, the planetary row and the differential mechanism are coaxially arranged, the output power of the differential mechanism is directly connected to wheels through a half shaft, and the planetary row assembly has no wheel-side speed reducer, few parts, small volume, compact structure, simple whole vehicle arrangement and low cost;
two motors are distributed on the front side and the rear side of the bridge, the planet row assemblies and the bridge are coaxially arranged, the electric drive bridge is reasonable in mass distribution, the mass center is close to the axle shaft of the axle housing, the cantilever is short, and the stress and the vibration condition are greatly improved.
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 (7)

1. The utility model provides a new forms of energy truck keeps off more and drives bridge construction, its characterized in that, it includes:
two motors, specifically an EM-B motor and an EM-A motor;
a set of reduction gear assemblies;
a set of two-speed gear assemblies;
the group of gear shifting planet row assemblies comprise main reduction teeth, a sun wheel shaft, a sun wheel, a planet carrier and a high-low gear shifting assembly, wherein the sun wheel shaft is a hollow shaft, the main reduction teeth are sleeved at the input end of the sun wheel shaft, and the sun wheel is fixedly sleeved at the output end of the sun wheel shaft;
a differential mechanism;
the two half shafts are respectively a left half shaft and a right half shaft;
the output end of the EM-B motor is connected with the input teeth of the reduction gear assembly, the output teeth of the reduction gear assembly are meshed with the main reduction teeth, a planet carrier is fixedly arranged on a shell of the differential, a plurality of planet wheels are annularly distributed at the positions, close to corresponding half shafts, of the planet carrier, an inner gear ring is annularly distributed on the periphery of an outer ring of each planet wheel, the planet wheels are respectively meshed with the inner gear ring and the sun wheel through gears, and the sun wheel is sleeved on one half shaft;
the gear shifting planet row assembly is coaxially arranged with the half shaft;
the high-low gear shifting assembly comprises an inner gear ring gear hub, a high-low gear shifting sliding sleeve, fixed combination teeth and planet carrier combination teeth, and the inner gear ring gear hub is arranged between the fixed combination teeth and the planet carrier combination teeth; the fixed combination teeth are fixedly connected with the electric drive axle housing and arranged towards the gear hub of the inner gear ring; the end part of the planet carrier, far away from the differential mechanism, is provided with planet carrier combination teeth and is arranged towards an inner gear ring gear hub, and the high-low gear shifting sliding sleeve moves axially to switch high and low gears;
the output end of the EM-A motor is connected with input teeth of the two-gear assembly, the two-gear assembly comprises a gear shifting sliding sleeve, output teeth of the two-gear assembly are meshed with the main reducing teeth, and the gear shifting sliding sleeve is used for performing two-gear and neutral gear switching operation;
the two motors are arranged in parallel and are arranged on the front side and the rear side of the half shaft.
2. The multi-gear electric drive bridge structure of the new energy truck as claimed in claim 1, wherein: the two motors are respectively arranged at two sides of the axial region between the corresponding main reducing gear and the sun gear.
3. The multi-gear electric drive bridge structure of the new energy truck as claimed in claim 1, wherein: the two-gear assembly comprises an A-side input shaft, an A-side input tooth, an A-side first-level driven tooth, an A-side intermediate shaft, a first-gear driving tooth, a second-gear driving tooth, an A-side output shaft, a first-gear driven tooth, a first-gear combining tooth, a second-gear driven tooth, a second-gear combining tooth, a second-gear hub, a second-gear shifting sliding sleeve and an A-side third-level driving tooth.
4. The new energy truck multiple-gear electric drive axle structure as claimed in claim 3, characterized in that: the right end of the input shaft at the side A is fixedly connected with the EM-A motor, and the left end of the input shaft at the side A is fixedly connected with the input teeth at the side A; the right end of the A side intermediate shaft is fixedly connected with the A side first-gear driving tooth, the left end of the A side intermediate shaft is fixedly connected with the A side first-gear driven tooth, and the middle of the A side intermediate shaft is fixedly connected with the A side second-gear driving tooth; the right end of the A-side output shaft is provided with a first-gear driven tooth, the left end of the A-side output shaft is fixedly connected with the A-side three-stage driving tooth, and a second-gear driven tooth is arranged in the middle of the A-side output shaft; the first gear driven tooth and the second gear driven tooth are respectively sleeved on the A-side output shaft in a hollow manner through bearings; a second gear hub is fixedly connected with the output shaft at the side A and is arranged between the first gear driven tooth and the second gear driven tooth; the first gear combination teeth are fixedly connected with the first gear driven teeth and face a first second gear hub; the two-gear combination teeth are fixedly connected with the two-gear driven teeth and face towards the two-gear hub; the outer spline is arranged on the outer periphery of the first-gear and second-gear hub, the inner spline is arranged on the inner periphery of the first-gear and second-gear shifting sliding sleeve, the first-gear and second-gear shifting sliding sleeve is sleeved on the first-gear and second-gear hub through the spline, and the first-gear and second-gear shifting sliding sleeve can axially slide on the first-gear and second-gear hub; the side A input teeth are meshed with the side A primary driven teeth, the first gear driving teeth are meshed with the first gear driven teeth, and the second gear driving teeth are meshed with the second gear driven teeth.
5. The multi-gear electric drive bridge structure of the new energy truck as claimed in claim 4, wherein: the reduction gear assembly comprises a B-side input shaft, B-side input teeth, B-side primary driven teeth, a B-side intermediate shaft and B-side secondary driving teeth; the right end of the B-side input shaft is fixedly connected with the EM-B motor, and the left end of the B-side input shaft is fixedly connected with the B-side input gear; the right end of the B-side intermediate shaft is fixedly connected with the B-side primary driven gear; the left end is fixedly connected with the B-side secondary driving tooth; and the B-side input teeth are meshed and connected with the B-side primary driven teeth.
6. The new energy truck multiple-gear electric drive axle structure as claimed in claim 1, characterized in that: the gear hub of the inner gear ring is internally provided with an internal spline, the fixed combination gear is provided with an external spline, the planet carrier combination gear is provided with an external spline, the inside and the outside of the high-low gear shifting sliding sleeve are uniformly provided with splines, the external spline on the high-low gear shifting sliding sleeve is matched with the internal spline on the gear hub of the inner gear ring and can axially slide on the high-low gear shifting sliding sleeve, and through sliding, the internal spline on the high-low gear shifting sliding sleeve can be in splined connection with the external spline on the fixed combination gear or the external spline on the planet carrier combination gear.
7. The multi-gear electric drive bridge structure of the new energy truck as claimed in claim 5, wherein: the main reducing gear is meshed with the B-side secondary driving gear, and the main reducing gear is meshed with the A-side tertiary driving gear.
CN202211200456.3A 2022-09-29 2022-09-29 New forms of energy truck keeps off more and drives bridge construction Pending CN115384295A (en)

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CN202211200456.3A CN115384295A (en) 2022-09-29 2022-09-29 New forms of energy truck keeps off more and drives bridge construction

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CN202211200456.3A CN115384295A (en) 2022-09-29 2022-09-29 New forms of energy truck keeps off more and drives bridge construction

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117565651A (en) * 2024-01-15 2024-02-20 江苏速豹动力科技有限公司 Electric drive bridge and electric truck

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117565651A (en) * 2024-01-15 2024-02-20 江苏速豹动力科技有限公司 Electric drive bridge and electric truck

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