CN108361328A - Drive axle speed change system - Google Patents
Drive axle speed change system Download PDFInfo
- Publication number
- CN108361328A CN108361328A CN201810073770.7A CN201810073770A CN108361328A CN 108361328 A CN108361328 A CN 108361328A CN 201810073770 A CN201810073770 A CN 201810073770A CN 108361328 A CN108361328 A CN 108361328A
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- CN
- China
- Prior art keywords
- planetary gear
- gear mechanism
- drive axle
- gear
- change system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
-
- 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
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
- B60K17/165—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing provided between independent half axles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
- F16H37/06—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
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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
- B60K2001/001—Arrangement or mounting of electrical propulsion units one motor mounted on a propulsion axle for rotating right and left wheels of this axle
-
- 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
- F16H2702/00—Combinations of two or more transmissions
- F16H2702/02—Mechanical transmissions with planetary gearing combined with one or more other mechanical transmissions
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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)
- Retarders (AREA)
- Structure Of Transmissions (AREA)
Abstract
The present invention provides a kind of drive axle speed change system, which includes：Driving motor；Planetary gear mechanism, input shaft are connected with the output shaft of driving motor；The executing agency being set on planetary gear mechanism is detached or is combined for the different elements to planetary gear mechanism.The control that the present invention is detached or combined to planetary gear mechanism different elements by executing agency carries out the control of locking, change the relative motion relation of planetary gear mechanism different elements, different transmission ratios is obtained, to which the rotating speed of the regulation motor under different drive ratios realizes that car speed is adjusted；Starting or low speed are run when running using larger transmission ratio, larger to realize the amplification of driving force, reduce the requirement to power of motor and torque, it is run using smaller transmission ratio when high speed, reduce the requirement to the maximum speed of motor, it avoids the problem that running at high speed the NVH brought, leakproofness, durability because of motor, meets the requirement of vehicle max. speed and dynamic property.
Description
Technical field
The present invention relates to actuation techniques fields, in particular to a kind of drive axle speed change system.
Background technology
The electric drive axle that the drive system of new-energy automobile is generally made of motor and retarder forms.Motor turns electric energy
It turns to mechanical energy and provides power for vehicle, then reduced the rotating speed of motor by retarder, while the output torque of motor being put
Greatly, the effect for realizing deceleration torque is enabled the vehicle in certain range of speeds and is run under certain driving force.Currently, new energy
Power drive system in the automobile of source generally uses motor and the retarder of fixed tooth ratio to constitute, to meet the max. speed of vehicle,
Motor speed needs are adjusted in wide range, to meet the dynamic property of vehicle, need to select the motor progress of relatively high power whole
Vehicle matches.
However existing automobile using fixed tooth than deceleration mechanism carry out matched scheme with motor, vehicle can be caused low
Speed operation and when high-speed cruising, when can only realize the adjusting of car speed, vehicle low speed or starting by the speed governing of motor pair
Motor output torque and power requirement are high, and when vehicle high-speed requires the maximum speed of motor high, and running at high speed for motor will
Influence noise, vibration and the sound vibration roughness of automobile（Noise, Vibration, Harshness, NVH）, sealing and durability.
Invention content
In consideration of it, the present invention proposes a kind of drive axle speed change system, it is intended to solve motor high speed in existing electric vehicle
Operating influences the problem of auto NVH.
The present invention proposes a kind of drive axle speed change system, which includes：Driving motor, the wheel hub for driving vehicle
Rotation；Planetary gear mechanism, input shaft are connected with the output shaft of the driving motor；It is set to the planetary gear mechanism
On executing agency, for the different elements to the planetary gear mechanism carry out separation or in conjunction with to realize the hub rotation speed
Adjusting.
Further, above-mentioned drive axle speed change system, the executing agency include：It is set in the planetary gear mechanism
Clutch between gear ring and planet carrier, the separation or combination for making the gear ring and the planet carrier are to cut off or transmit institute
State the power transmitted between gear ring and the planet carrier.
Further, above-mentioned drive axle speed change system, hub is connected with the planet carrier in the clutch of the clutch,
The outer hub of the clutch of the clutch is connected with the gear ring.
Further, above-mentioned drive axle speed change system, the executing agency further include：It is set to the planetary gear mechanism
Brake on middle sun gear, for making the sun gear braking so that the planetary gear mechanism exports the driving motor
Rotating speed carry out deceleration processing.
Further, above-mentioned drive axle speed change system, hub is connected with the sun gear in the brake of the brake,
The outer hub of the brake of the brake is connected with the shell of the drive axle speed change system.
Further, above-mentioned drive axle speed change system, the planetary gear mechanism pass through primary speed-down mechanism and the drive
The motor shaft of dynamic motor is connected, and the rotating speed for being exported to the driving motor carries out deceleration processing.
Further, above-mentioned drive axle speed change system, the speed change system further include：Box of tricks, input shaft and institute
The output shaft for stating planetary gear mechanism is connected, for adjusting the speed discrepancy between each wheel hub.
Further, above-mentioned drive axle speed change system, the box of tricks pass through two reduction gear and the planet tooth
Wheel mechanism is connected, and the rotating speed for being exported to the planetary gear mechanism carries out secondary speed-reducing processing.
Further, above-mentioned drive axle speed change system, the box of tricks include：Be set to the two reduction gear from
Differential shell on moving gear；The planet axis being set in the differential shell, for driving the planet tooth in the planet axis
Wheel rotation；At least two axle shaft gears being meshed with the planetary gear, for respectively driving the corresponding wheel hub
Rotation.
Further, above-mentioned drive axle speed change system, each axle shaft gear pass through transmission shaft and corresponding institute
Wheel hub is stated to be connected.
Further, the motor shaft of above-mentioned drive axle speed change system, the driving motor is a hollow shaft；One of institute
It states transmission shaft and is arranged in the motor shaft so that the transmission shaft is connected with the wheel hub of the vehicle side, another transmission
Axis is connected with the wheel hub of the vehicle other side
Drive axle speed change system provided by the invention is coordinated by driving motor and planetary gear mechanism, realizes the transmission of power；
The control that planetary gear mechanism different elements are detached or combined by executing agency carries out the control of locking, to change
Become the relative motion relation of planetary gear mechanism different elements, and then obtain different transmission ratios, under different drive ratios
The rotating speed of regulation motor realizes that car speed is adjusted.
Especially, according to power performance and economy demand, determine that the gear ratio of gear, starting or low speed are adopted when running
It is run with low or first gear, that is, larger transmission ratio, can larger realize the amplification of driving force, reduce to power of motor and torque
Requirement, run using the smaller transmission ratio of top gear when high speed, reduce the requirement to the maximum speed of motor, avoid
Because motor run at high speed the NVH brought, leakproofness, durability the problem of, while vehicle max. speed and dynamic property can be met
Requirement.
Further, separation and the knot between sun gear and clutch control planet carrier and gear ring are controlled by brake
It closes, realizes the control of planet carrier motion state, to change the gear ratio of planetary gear mechanism, and then realize vehicle hub rotating speed
Adjusting；The fixation that sun gear is realized by brake, to realize that power exports after gear ring input from planet carrier so that row
Star gear mechanism plays decelerating effect, and then realizes the low speed operation of vehicle hub；Gear ring and planet carrier are realized by clutch
Between be fixedly connected, planetary gear mechanism operates as a whole at this time, without decelerating effect, and then realizes the height of vehicle hub
Speed operation.
Description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit are common for this field
Technical staff will become clear.Attached drawing only for the purpose of illustrating preferred embodiments, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings：
Fig. 1 is the structural schematic diagram of drive axle speed change system provided in an embodiment of the present invention；
Fig. 2 is structural schematic diagram when drive axle speed change system low speed provided in an embodiment of the present invention runs and reverses gear；
Fig. 3 is the structural schematic diagram of drive axle speed change system high-speed cruising provided in an embodiment of the present invention.
Specific implementation mode
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Completely it is communicated to those skilled in the art.It should be noted that in the absence of conflict, embodiment in the present invention and
Feature in embodiment can be combined with each other.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
It is the structural schematic diagram of drive axle speed change system provided in an embodiment of the present invention, the drive axle speed change referring to Fig. 1
System includes：Driving motor 1, primary speed-down mechanism 2, planetary gear mechanism 3, executing agency 4, two reduction gear 5 and differential
Mechanism 6；Wherein, driving motor 1, for driving the wheel hub 8 of vehicle to rotate.
Specifically, those skilled in the art are it is contemplated that the drive axle speed change system is provided with shell（In figure not
It shows）, the shapes and sizes of shell can be selected according to actual conditions；It is well-known to those skilled in the art to be, driving
Motor 1 includes：Electrode stator 11 and rotor 12, motor stator 11 are connected with shell, to ensure 12 turns of rotor
Dynamic stability；Driving motor 1 is set between two wheel hubs of vehicle, and the motor shaft 13 of driving motor 1 is used as driving motor 1
Output shaft, motor shaft 13 be inner hollow axis body make biography after being arranged in motor shaft 13 in order to one of transmission shaft 7
The right end and vehicle right side of moving axis 7（For position shown in FIG. 1）Wheel hub 8 be connected.
With continued reference to Fig. 1, the input shaft of planetary gear mechanism 3 is connected with output shaft, that is, motor shaft 13 of driving motor 1；
Planetary gear mechanism 3 is connected by primary speed-down mechanism 2 with output shaft, that is, motor shaft 13 of driving motor 1, for driving
The rotating speed that motor 1 exports carries out deceleration processing.
Specifically, primary speed-down mechanism 2 is gear reduction；The primary speed-down driving gear of primary speed-down mechanism 2
21 and the connection type of the motor shaft 13 of driving motor 1 can be two ways：One, it is the steady of 2 rotation of raising primary speed-down mechanism
Qualitative and easy to process, primary speed-down driving gear 21 and the motor shaft 13 i.e. output shaft of rotor 12 of driving motor 1 are logical
It crosses spline to be connected, convenient for processing between the two, to reduce cost；Two, primary speed-down driving gear 21 and driving motor 1
Motor shaft 13 be structure as a whole, i.e., motor shaft 13 is not only the output shaft of rotor 12 again as level-one as driving motor 1
The input shaft of deceleration driving gear 21 is conducive to reduce assembly difficulty, reduces amount of parts, and conducive to transmission stiffness is improved, protect
Transmission accuracy and transmission stability are demonstrate,proved, and the bearing capacity for increasing power output shaft improves its intensity so that output power knot
Structure is more firm, and can reduce outflow power running noises, while making the system structure compact；Therefore preferably, primary speed-down
Driving gear 21 and output shaft, that is, motor shaft 13 of driving motor 1 are structure as a whole；It is further preferred that primary speed-down driving tooth
Wheel 21 is fixed on the end of motor shaft 13（Left end as shown in Figure 1）；The primary speed-down driven gear 22 of primary speed-down mechanism 2 with
Primary speed-down driving gear 21 is meshed, and is moved between primary speed-down driven gear 22 and primary speed-down driving gear 21 to realize
The rotating speed that the transmission of power in turn exports driving motor 1 slows down.
With continued reference to Fig. 1, the input shaft of planetary gear mechanism 3 is connected with primary speed-down driven gear 22.
Specifically, known in those skilled in the art be, planetary gear mechanism 3 includes：Sun gear 31 is equipped with row
The planet carrier 34 and gear ring 33 of star-wheel 32；Gear ring 33 and the output shaft of primary speed-down driven gear 22 are structure as a whole, in turn
Ensure transmission accuracy and transmission stability and increase the bearing capacity of power output shaft to improve its intensity, while outflow can be reduced
Power running noises；Planetary gear 32 is meshed with gear ring 33, and sun gear 31 is meshed with planetary gear 32, will pass through planetary gear 32
The rotation of sun gear 31 and the planet carrier 34 on planetary gear 32 is driven, and then realizes the transmission of power and planetary gear machine can be passed through
The locking of 3 each element of structure adjusts the transmission of its power, to realize the adjusting of 8 rotating speed of wheel hub.
With continued reference to Fig. 1, executing agency 4 is set on planetary gear mechanism 3, for the difference to planetary gear mechanism 3
Element is detached or in conjunction with to realize the adjusting of 8 rotating speed of wheel hub.
Specifically, executing agency 4 is by making sun gear 31, planetary gear 32, planet carrier 34 and the tooth of planetary gear mechanism 3
Being relatively fixed between the fixation of element and locked or multiple element in circle 33, realize in planetary gear mechanism 3 not
It is detached or is combined with element, and then realize the variation of the relative motion relation between 3 different elements of planetary gear mechanism, from
And the rotating speed for adjusting the output of planetary gear mechanism 3 realizes the adjusting of 8 rotating speed of wheel hub.
With continued reference to Fig. 1, box of tricks 6 is connected by two reduction gear 5 with planetary gear mechanism 3, for row
The rotating speed that star gear mechanism 3 exports carries out secondary speed-reducing.
Specifically, two reduction gear 5 is gear reduction；Preferably, the double reduction master of two reduction gear 5
Moving gear 51 and the planet carrier 34 of planetary gear mechanism 3 are connected or both by spline to be structure as a whole；It is further preferred that
Double reduction driving gear 51 is fixed on the end of planet carrier 34（Left end as shown in Figure 1）；The two level of two reduction gear 5 subtracts
Fast driven gear 52 is meshed with double reduction driving gear 51, to realize double reduction driven gear 52 and double reduction master
The rotating speed that the transmission of power in turn exports planetary gear mechanism 3 between moving gear 51 slows down；Box of tricks 6 is set to two
On grade reduction driven gear 52, to drive box of tricks 6 to rotate；The axle shaft gear 64 of box of tricks 6 passes through transmission shaft 7 respectively
Wheel hub corresponding with the axle shaft gear 64 of vehicle 8 is connected, different in Ackermann steer angle adjustment vehicle will pass through box of tricks 6
Speed discrepancy between wheel hub 8；Preferably, one of transmission shaft 7 is connected across motor shaft 13 with the wheel hub 8 of vehicle side,
Another transmission shaft 7 is connected with the wheel hub 8 of the vehicle other side.
It will be readily appreciated that drive axle speed change system provided in this embodiment, passes through driving motor 1 and planetary gear
Mechanism 3 coordinates, and realizes the transmission of power；3 different elements of planetary gear mechanism are detached or combined by executing agency 4
Control carries out the control of locking, to change the relative motion relation of 3 different elements of planetary gear mechanism, and then obtains different
Transmission ratio, under different drive ratios regulation motor rotating speed i.e. realize car speed adjust；According to power performance and
Economy demand, determines the gear ratio of gear, is run using low or first gear, that is, larger transmission ratio when starting or low speed are run, can be with
The amplification for larger realizing driving force, reduces the requirement to power of motor and torque, and when high speed is smaller using top gear
Transmission ratio run, reduce the requirement to the maximum speed of motor, avoid because motor run at high speed the NVH brought, leakproofness,
The problem of durability, while the requirement of vehicle max. speed and dynamic property can be met.
Referring to Fig. 2 and Fig. 3, executing agency 4 includes：Clutch 41 and brake 42；Wherein, clutch 41 is set to planet
In gear mechanism 3 between gear ring 33 and planet carrier 34, the separation or combination for making gear ring 33 and planet carrier 34 are to cut off or pass
Pass the power transmitted between gear ring 33 and planet carrier 34.
Specifically, hub 411 is connected with planet carrier 34 in the clutch of clutch 41, the outer hub of clutch of clutch 41
412 are connected with gear ring 33, and by the separation of clutch 41 and be implemented in combination with gear ring 33 and planet carrier 34 detach and combination,
To cut off or transmit the power transmitted between gear ring 33 and planet carrier 34, and then realize opposite fortune between gear ring 33 and planet carrier 34
The change of dynamic relationship directly drives the rotation of planet carrier 34 either gear ring 33 to pass through 32 band of planetary gear to realize by gear ring 33
Dynamic planet carrier 34 rotates.
With continued reference to Fig. 2 and Fig. 3, brake 42 is set in planetary gear mechanism 3 on sun gear 31, for braking the sun
The rotation of wheel 31 is so that the rotating speed that planetary gear mechanism 3 exports driving motor 1 carries out deceleration processing.
Specifically, hub 421 is connected with sun gear 31 in the brake of brake 42, the outer hub of brake of brake 42
422 are connected with the shell of the drive axle speed change system, and by the separation of brake 42 and be implemented in combination with sun gear 31 with
Separation between the shell of drive axle speed change system and combination, so realize sun gear 31 and drive axle speed change system shell it
Between relative motion relation change, so as to realize by sun gear 31 lock power from gear ring 33 input from planet carrier 34 output i.e.
Actively, i.e., planetary gear mechanism 3 is train of reduction gears to the passive gear ring of the motionless planet carrier of sun gear, and then is realized to driving motor 1
The rotating speed of output slows down, operation when so as to vehicle low speed or reversing gear.
Obviously can with obtain, executing agency 4 provided in this embodiment, pass through clutch 41 realize gear ring 33 and row
The separation or combination of carrier 34, it is logical to realize to realize the change of relative motion relation between gear ring 33 and planet carrier 34
Cross gear ring 33 directly drive planet carrier 34 rotation either gear ring 33 by planetary gear 32 drive planet carrier 34 rotate, with by from
Clutch 41 is implemented in combination with being fixedly connected for gear ring 33 and planet carrier 34, directly to pass through planet carrier after 33 input power of gear ring
34 outputs are that planetary gear mechanisms 3 operate as a whole, no decelerating effect, so that vehicle reduces pair in high-speed cruising
The requirement of the maximum speed of motor, and then meet requirement when height of car is run to vehicle max. speed；Pass through brake 42
The change for realizing relative motion relation between sun gear 31 and the shell of drive axle speed change system, to realize through sun gear 31
It is the passive gear ring active of the motionless planet carrier of sun gear, i.e. planet gear mechanism that locked power, which is inputted from gear ring 33 from the output of planet carrier 34,
Structure 3 is train of reduction gears, and then realizes that the rotating speed exported to driving motor 1 slows down, so that vehicle start or low speed
The amplification of driving force is larger realized when operation, reduces the requirement to power of motor and torque.
With continued reference to Fig. 1 and Fig. 2, box of tricks 6 includes：Differential shell 61, planet axis 62, planetary gear 63 and at least two
A axle shaft gear 64；Wherein, differential shell 61 is set to the driven gear i.e. double reduction driven gear 52 of two reduction gear 5
On；Planet axis 62 is set in differential shell 61, for driving two planetary gears 63 in planet axis 62 to rotate.
Specifically, differential shell 61 includes poor shell ontology and the poor shell cover being fixedly connected with poor shell ontology；Preferably, poor
It is separate structure between shell ontology and poor shell cover, avoids that excessive rotate gear group construction opening is arranged in poor shell cover, effectively carry
The high intensity of differential shell 61, also allows for the installation of its internal gear group；Preferably, poor shell ontology and poor shell cover are along planet axis
62 axis direction arrangement；The planet hole for installing planet axis 62 is provided on differential shell 61, will pass through differential shell
The rotation of planet axis 62 is driven on 61；Planet axis 62 is set up in parallel along its axis direction there are two planetary gear 63, planet
Gear 63 is rotated with the rotation of planet axis 62；Preferably, planet axis 62 is two, and planetary gear 64 is four, two planets
Axis 62 can be in that " ten " font is arranged, so that planetary gear 64 is symmetrically disposed in planet axis 62, and then turn respectively with runner hub 8
It is dynamic；It is further preferred that groove is arranged at 62 intermediate position of planet axis, the depth and width of groove are all higher than or are equal to long wheel shaft
Radius form " ten " word planet axle assembly by the way that the groove position of two long wheel shafts is worked in coordination；For the ease of planet tooth
63 lubrication is taken turns, the flat position of oil duct is provided in planet axis 62, passes through the flat position of oil duct so that oil duct of the lubricating oil in planet axis 62
Flat position is lubricated the planetary gear 63 in planet axis 62.
With continued reference to Fig. 2 and Fig. 3, axle shaft gear 64 is meshed with planetary gear 63, for respectively driving hub rotation.
Specifically, planetary gear 63 is rotated with planet axis 62, to drive axle shaft gear 64 to rotate, half is effectively increased
The stability that shaft gear 63 rotates after being engaged with planetary gear 64, and then reduce running noise；Axle shaft gear 64 passes through transmission
Axis 7 is connected with wheel hub 8, and then is rotated with runner hub 8, while adjusting the speed discrepancy between each wheel hub 8.
Obviously it is achieved that, box of tricks 6 provided in this embodiment, differential shell 61 is driven by differential shell 61
Planetary gear 63 in interior planet axis 62 rotates, and then axle shaft gear 64 is driven to rotate, to realize between axle shaft gear 64
Different rotating speeds, to realize the adjusting of speed discrepancy between wheel hub 8, to meet the needs of turn inside diameter.
The course of work of drive axle speed change system provided in this embodiment：
Referring to Fig. 2, when low-speed forward, that is, bottom gear power transmission line, brake 42 combines and clutch 41 detaches, by the sun
Wheel 31 is combined with the shell of drive axle speed change system fixes sun gear 31；First, driving motor 1 is exported from rotor 12
It after driving force, is transmitted on primary speed-down driven gear 22 by primary speed-down driving gear 21, will pass through first class reducer
After the rotating speed that structure 2 exports driving motor 1 slows down, gear ring 33 is transferred a driving force to by primary speed-down driven gear 22
To impart power to planetary gear mechanism 3；Then, it is sun gear 31 in planetary gear mechanism 3 to be fixed due to sun gear 31
Locked, power is exported from planet carrier 34 to the double reduction driving gear 51 of two reduction gear 5 after being inputted from gear ring 33, i.e.,
Planetary gear mechanism 3 plays decelerating effect；Finally, after power is inputted by double reduction driving gear 51, pass through double reduction
Driven gear 52 drives differential shell 61 to rotate to drive the planet axis 62 being set on differential shell 61 to rotate, and then drives
The planetary gear 63 being set in planet axis 62, to drive the rotation of axle shaft gear 64 to distribute power by box of tricks 6
To both sides axle shaft gear 64, rotated with runner hub 8 eventually by transmission shaft 7, the transmission of power when realizing low speed；
With continued reference to Fig. 2, power transmission line is identical as low-speed forward gear power transmission line when reversing gear, anti-using control motor
Vehicle gear reversing function is realized by the transfer mode of above-mentioned power after turning；
Referring to Fig. 3, power transmission line when top gear, clutch 41 combines and brake 42 detaches, by gear ring 33 and planet carrier
34 are fixedly connected, and planetary gear mechanism 3 operates as a whole at this time, without decelerating effect；First, driving motor 1 turns from motor
After sub 12 output driving power, it is transmitted on primary speed-down driven gear 22 by primary speed-down driving gear 21, will pass through one
After grade deceleration mechanism 2 slows down to the rotating speed that driving motor 1 exports, driving force is transmitted by primary speed-down driven gear 22
To gear ring 33 to impart power to planetary gear mechanism 3；Since gear ring 33 is fixedly connected with planet carrier 34, planetary gear machine
Structure 3 operates the transmission for being only used for power as a whole, and power is transferred to the double reduction of two reduction gear 5 by planet carrier 34
On driving gear 51, after slowing down by two reduction gear 5, power is distributed to by axle shaft gear 64 by box of tricks 6, finally
It is rotated with runner hub 8 by transmission shaft 7, the transmission of power when realizing high speed.
To sum up, drive axle speed change system provided in this embodiment is coordinated by driving motor 1 and planetary gear mechanism 3, real
The transmission of existing power；The control that 3 different elements of planetary gear mechanism are detached or combined by executing agency 4 is locked
Control only to change the relative motion relation of 3 different elements of planetary gear mechanism, and then obtains different transmission ratios, from
And the rotating speed of regulation motor realizes that car speed is adjusted under different drive ratios；According to power performance and economy demand,
It determines the gear ratio of gear, is run, can be larger realized using low or first gear, that is, larger transmission ratio when starting or low speed are run
The amplification of driving force, reduces the requirement to power of motor and torque, and when high speed is run using the smaller transmission ratio of top gear,
The requirement to the maximum speed of motor is reduced, is avoided because the run at high speed NVH that brings, leakproofness, durability of motor is asked
Topic, while the requirement of vehicle max. speed and dynamic property can be met.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (12)
1. a kind of drive axle speed change system, which is characterized in that including：
Driving motor（1）, the wheel hub for driving vehicle（8）Rotation；
Planetary gear mechanism（3）, input shaft and the driving motor（1）Output shaft be connected；
It is set to the planetary gear mechanism（3）On executing agency（4）, for the planetary gear mechanism（3）Difference
Element carries out separation or in conjunction with to realize the wheel hub（8）The adjusting of rotating speed.
2. drive axle speed change system according to claim 1, which is characterized in that the executing agency（4）Including：
It is set to the planetary gear mechanism（3）Middle gear ring（33）With planet carrier（34）Between clutch（41）, for making
State gear ring（33）With the planet carrier（34）Separation or in conjunction with to cut off or transmit the gear ring（33）With the planet carrier
（34）Between the power that transmits.
3. drive axle speed change system according to claim 2, which is characterized in that
The clutch（41）Clutch in hub（411）With the planet carrier（34）It is connected, the clutch（41）From
The outer hub of clutch（412）With the gear ring（33）It is connected.
4. drive axle speed change system according to any one of claims 1 to 3, which is characterized in that the executing agency（4）Also
Including：
It is set to the planetary gear mechanism（3）Middle sun gear（31）On brake（42）, for making the sun gear（31）
Braking is so that the planetary gear mechanism（3）To the driving motor（1）The rotating speed of output carries out deceleration processing.
5. drive axle speed change system according to claim 4, which is characterized in that
The brake（42）Brake in hub（421）With the sun gear（31）It is connected, the brake（42）System
The dynamic outer hub of device（422）It is connected with the shell of the drive axle speed change system.
6. drive axle speed change system according to any one of claims 1 to 3, which is characterized in that
The planetary gear mechanism（3）Pass through primary speed-down mechanism（2）With the driving motor（1）Motor shaft be connected, use
In to the driving motor（1）The rotating speed of output carries out deceleration processing.
7. drive axle speed change system according to any one of claims 1 to 3, which is characterized in that the speed change system also wraps
It includes：
Box of tricks（6）, input shaft and the planetary gear mechanism（3）Output shaft be connected, for adjusting each wheel
Hub（8）Between speed discrepancy.
8. drive axle speed change system according to claim 7, which is characterized in that
The box of tricks（6）Pass through two reduction gear（5）With the planetary gear mechanism（3）It is connected, for described
Planetary gear mechanism（3）The rotating speed of output carries out secondary speed-reducing processing.
9. drive axle speed change system according to claim 8, which is characterized in that the box of tricks（6）Including：
It is set to the two reduction gear（5）Differential shell on driven gear（61）；
It is set to the differential shell（61）Interior planet axis（62）, for driving the planet axis（62）On planetary gear
（63）Rotation；
With the planetary gear（63）At least two axle shaft gears being meshed（64）, for respectively drive it is corresponding described in
Wheel hub（8）Rotation.
10. drive axle speed change system according to claim 9, which is characterized in that
Each axle shaft gear（64）Pass through transmission shaft（7）The corresponding wheel hub（8）It is connected.
11. drive axle speed change system according to claim 10, which is characterized in that
The driving motor（1）Motor shaft（13）For a hollow shaft；
One of them described transmission shaft（7）It is arranged in the motor shaft（13）So that the transmission shaft（7）With the vehicle side
Wheel hub（8）It is connected, another transmission shaft（7）With the wheel hub of the vehicle other side（8）It is connected.
12. electric drive axle system according to claim 8, which is characterized in that
The gear ring of the planetary gear mechanism is connected with the output shaft of the driving motor；
The input shaft of the two reduction gear is connected with the planet carrier of the planetary gear mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810073770.7A CN108361328A (en) | 2018-01-25 | 2018-01-25 | Drive axle speed change system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810073770.7A CN108361328A (en) | 2018-01-25 | 2018-01-25 | Drive axle speed change system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108361328A true CN108361328A (en) | 2018-08-03 |
Family
ID=63007076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810073770.7A Pending CN108361328A (en) | 2018-01-25 | 2018-01-25 | Drive axle speed change system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108361328A (en) |
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Application publication date: 20180803 |
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