CN109532463A - Planet Traction Drive bearing type reduction electric hub - Google Patents
Planet Traction Drive bearing type reduction electric hub Download PDFInfo
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- CN109532463A CN109532463A CN201811407558.6A CN201811407558A CN109532463A CN 109532463 A CN109532463 A CN 109532463A CN 201811407558 A CN201811407558 A CN 201811407558A CN 109532463 A CN109532463 A CN 109532463A
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- planet
- bearing type
- traction drive
- drive bearing
- speed reducer
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- 230000009467 reduction Effects 0.000 title claims abstract description 27
- 238000005096 rolling process Methods 0.000 claims abstract description 103
- 230000005540 biological transmission Effects 0.000 claims abstract description 99
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 69
- 238000000338 in vitro Methods 0.000 claims abstract description 11
- 239000000969 carrier Substances 0.000 claims description 5
- 241000222712 Kinetoplastida Species 0.000 claims 2
- 230000000694 effects Effects 0.000 description 12
- 238000009434 installation Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
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- 238000003379 elimination reaction Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- 238000003825 pressing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
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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
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
- B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K2007/0092—Disposition of motor in, or adjacent to, traction wheel the motor axle being coaxial to the wheel axle
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Friction Gearing (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
Abstract
The invention discloses a kind of planet Traction Drive bearing type reduction electric hub, including wheel hub and it is set to the intracorporal motor of wheel hub cavity and planet Traction Drive bearing type speed reducer；The motor output power is exported by planet Traction Drive bearing type speed reducer to wheel hub and drive hub rotates, the planet Traction Drive bearing type speed reducer include be driven inner shaft, the planet Traction Drive train that outer ring, planet rolling body and planet carrier are collectively formed, the planet rolling is in vitro between round and outer ring inner circle and planet rolling is justified form matching pair by annular protrusion and annular channel frictional drive between transmission inner shaft outer circle in vitro；The present invention is slowed down by planet Traction Drive bearing type, simplifies the integrated structure of the motor bearings, hub bearing and retarder of electric wheel hub, overall dimensions are small, it is compact-sized, be conducive to improve power density and reduce cost.
Description
Technical field
The invention belongs to Automobile drive technical field, in particular to a kind of planet Traction Drive bearing type deceleration electric wheel
Hub.
Background technique
Existing electric wheel hub structure mainly by axis, the shell being mounted on axis by bearing, be set in the housing
Motor and the components such as planetary gear speed reducing mechanism and clutch constituted, for rotor and hub body in hub motor
Rotation usually requires independent bearing and is supported, and rotor, the planet carrier of planetary reducer and hub body are equal
Respectively by independent bearing support rotary, this structure considerably increases the quantity of hub motor middle (center) bearing, causes wheel hub electric
Machine complicated integral structure improves the difficulty of its production cost and assembly, and the components such as motor, retarder and bearing
It needs to be sequentially arranged in the axial direction, considerably increases the axial dimension of wheel hub structure, cause the arrangement space of hub positions
Limited, since level-one is usually only arranged in the limitation deceleration mechanism of its arrangement space, the power of motor passes through primary speed-down mechanism
To the output of motor side and drive hub rotation, it is driven relatively low, it is difficult to using high-speed motor as the power of hub motor,
Lead to wheel hub there are torsion that small, revolving speed is low, noise is big.
A kind of double reduction bearing-type hub motor is disclosed in CN106655613A, motor is drawn by two-stage planet
Speed reduction bearing carries out power transmission, and planet, which is drawn, to be cooperated between planet rolling body and inside and outside circle in speed reduction bearing using smooth surface,
The unbearable axial load of this structure, to guarantee that can bear certain axial load needs to add additional axial direction positioning device,
Leading to speed reduction bearing, structure is complicated, size is larger in the axial direction for overall structure, and class formation will lead to when bearing axial force
Efficiency is greatly reduced；During the work time, the moment of resistance or moment of flexure that output shaft is subject to can act on planet rolling body this structure,
Planet rolling body both ends are caused to generate torque difference, this torque difference will lead to the torsion of planet rolling body in its axis direction run-off the straight
Deformation, this deformation will lead to vibration and noise and increase, efficiency decline, and when operating, which gets stuck, leads to run not smooth, or even meeting
Stuck phenomenon occurs；
In order to solve the above problem, a kind of compact-sized electric wheel hub is needed, there is high power density, can prevent from vibrating,
Reduce noise, the advantages that improving efficiency and eliminate stuck phenomenon.
Summary of the invention
In view of this, the present invention provides a kind of planet Traction Drive bearing type reduction electric hub, and it is compact-sized, have
High power density can prevent from vibrating, and reduce noise, the advantages that improving efficiency and eliminate stuck phenomenon.
Planet Traction Drive bearing type reduction electric hub of the invention, including wheel hub and to be set to wheel hub cavity intracorporal
Motor and planet Traction Drive bearing type speed reducer；The motor output power is defeated by planet Traction Drive bearing type speed reducer
Out to wheel hub and drive hub rotation, the planet Traction Drive bearing type speed reducer includes transmission inner shaft, outer ring, planet rolling
The planet Traction Drive train that body and planet carrier are collectively formed, the planet rolling justifies between the inner circle of outer ring in vitro and planet
Matching pair is formed by annular protrusion and annular channel between rolling element outer circle and transmission inner shaft outer circle；The planet rolling body is logical
The mode and transmission inner shaft and outer ring for crossing frictional drive cooperate.
Further, the planet Traction Drive bearing type speed reducer is set in the stator of motor or the inner cavity of rotor.
Further, the annular protrusion and annular channel are used to generate the positive pressure of frictional drive in an interference fit
Power.
Further, the planet rolling body can axially disposed multiple row.
Further, adjacent two column planet rolling body is circumferentially uniformly staggered along transmission inner shaft.
Further, the annular protrusion be located at planet rolling in vitro justify on, the annular channel be located at transmission inner shaft outer circle
In upper and outer ring inner circle.
Further, the planet Traction Drive bearing type speed reducer includes the primary planet Traction Drive bearing of two-stage transmission
Type speed reducer and secondary planet Traction Drive bearing type speed reducer.
Further, the output power of the motor passes sequentially through in the transmission of primary planet Traction Drive bearing type speed reducer
Axis, planet carrier export the transmission inner shaft to secondary planet Traction Drive bearing type speed reducer and are outputted power to by its outer ring
Wheel hub drives its rotation.
Further, the planet carrier includes two left part planet carriers being linked together positioned at planet rolling body axial ends
With right part planet carrier, the planet rolling body and its wheel shaft are rotatably assorted and are mounted on two planet carriers.
Further, at least one set of mutually matched ring raceway is provided between the wheel shaft outer circle and rolling element inner circle,
Roller is provided in the ring raceway.
Beneficial effects of the present invention:
Planet Traction Drive bearing type speed reducer is used in wheel hub of the invention, utilizes transmission inner shaft, planet rolling body, outer
The normal pressure enclosed between contact surface carries out the radial support of axis, using between transmission inner shaft, planet rolling body, outer ring contact surface
Frictional force carries out passing movement and power, to realize epicyclic friction gear transmission and bearing function, this structure collection slows down and bearing
Function is integrated, and for using the retarder of gear transmission mode, has that structure is simple, bearing smooth running, when transmission
Overload can skid and have many advantages, such as automatic antioverloading function, and the arrangement planet rolling body and transmission inner shaft of this structure are pressurized,
Therefore it is not high for the diametric requirements of planet rolling body and transmission inner shaft, it can be by reducing planet rolling body and being driven the diameter of inner shaft
The radial arrangement size for reducing planet traction train, reduces the overall dimensions of drive system, so that entire driving system structure is tight
It gathers；
The mutual limitation of annular protrusion and annular channel in the present invention can improve transmission inner shaft and planet rolling body and
The support situation of planet rolling body and outer ring, and the bending stiffness of planet Traction Drive bearing type speed reducer is improved, and increase
It connects and improves driving torque and power；Pass through annular protrusion and annular ditch between planet rolling body and transmission inner shaft and outer ring
Road cooperates so that this planet traction wheel system can carry axial load, annular protrusion and annular channel side wall when carry axial load
Mutually compress the contact area for increasing its frictional drive, it is ensured that the normal operation of retarder simultaneously increases driving torque；；This knot
Structure reduces the axial positioning structure to components such as transmission inner shaft, planet carrier and planet rolling bodies, simplifies the knot of retarder
Structure reduces its axial dimension, can further decrease the axial arrangement size of wheel hub, make its it is compact-sized be easily installed, reduce
Requirement to installation space, increases Installation Flexibility；It is limited by the mutual structure of annular protrusion and annular channel, works as row
When star rolling element both ends generate torque difference, the inclination deformation in planet rolling body axially direction can be effectively limited, is effectively prevent
The generation of vibration reduces noise, eliminates the phenomenon that gets stuck, and improves its and runs fluency；In axial same straight line size, this structure
So that the contact area between planet rolling body and transmission inner shaft, outer ring increases, the stress state of contact surface is improved, is reduced
Stress is concentrated, and transmission power and transmission efficiency are improved；
Planet Traction Drive bearing type speed reducer of the invention is arranged in the rotor of motor or the cavity of electronics, is reducing
Under the premise of motor volume, its radial dimension is reduced by the improvement for drawing train to planet, it is fixed to make it easier to be installed in motor
In the cavity of son or rotor, solving planet traction, train radial dimension is excessive leads to not and motor stator or rotor internal cavity phase
The problem of cooperation, this structure become one planet Traction Drive bearing type speed reducer with motor, greatly reduce driving system
The axial distance of system keeps its compact-sized, improves Installation Flexibility, and when assembling with car body, to other components, there are more
More installation spaces reduces the difficulty of vehicle space layout；
The present invention passes through I and II planet drawing transmission shaft in the case where guaranteeing its axial, lesser situation of radially installed size
The superposition for holding the reduction ratio of type speed reducer can reach higher transmission ratio, so that the revolving speed of motor can be improved, and then reduce motor
Volume improves power density；
The present invention simplifies the structure of motor and planetary reduction gear bearing, the matched global consistency of the two is improved, so that whole
Reach good matching between a each components of system, stator core area can increase by its structure optimization, so as to improve
The transmission path of the magnetic line of force, improves electromagnetic performance, further increases the power and efficiency of motor；
Left and right end cap of the invention is not necessarily to undertake the axial positioning function of components in wheel hub, therefore end cap need to only reach letter
Single sealing function, reduces the materials requirement and intensity requirement of left and right end cap, reduces the materials cost of material.
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is schematic structural view of the invention 1；
Fig. 2 is schematic structural view of the invention 2；
Fig. 3 is schematic structural view of the invention 3；
Fig. 4 is annular protrusion and annular channel the first fit system structural schematic diagram；
Fig. 5 is second of fit system structural schematic diagram of annular protrusion and annular channel；
Fig. 6 is annular protrusion and annular channel the third fit system structural schematic diagram；
Specific embodiment
Fig. 1 is schematic structural view of the invention 1；Fig. 2 is schematic structural view of the invention 2；Fig. 3 is schematic structural view of the invention 3；
Fig. 4 is annular protrusion and annular channel the first fit system structural schematic diagram；Fig. 5 is annular protrusion and second of annular channel
Fit system structural schematic diagram；Fig. 6 is annular protrusion and annular channel the third fit system structural schematic diagram；
It is as shown in the figure: the planet Traction Drive bearing type reduction electric hub of the present embodiment, including wheel hub 1 and be set to
The intracorporal motor 2 of wheel hub cavity and planet Traction Drive bearing type speed reducer；The motor output power passes through planet Traction Drive
Bearing type speed reducer is exported to wheel hub and drive hub rotation, and the planet Traction Drive bearing type speed reducer includes transmission inner shaft
3, the planet Traction Drive train that outer ring 4, planet rolling body 5 and planet carrier 6 are collectively formed, the planet rolling are round and outer in vitro
Between circle inner circle and planet rolling is matched between circle and transmission inner shaft outer circle by annular protrusion 7 and the formation of annular channel 8 in vitro
It closes secondary；Transmission inner shaft 3, outer ring 4, planet rolling body 5 and planet carrier 6 position correspond respectively to the sun in planet traction train
Wheel, outer ring, planetary gear and planet carrier；The planet rolling body is cooperated by way of frictional drive with transmission inner shaft and outer ring；
Different components can reach different effects as input terminal and output end in planet Traction Drive bearing type speed reducer, such as pass
Dynamic inner shaft then achievees the effect that deceleration torque increase as output end as input terminal, planet carrier, is driven inner shaft as input terminal, outer ring
Then achieve the effect that invert deceleration torque increase as output end, planet carrier reaches increasing as output end as input terminal, transmission inner shaft
The effect of speed, outer ring have the function that reversion speedup as output end as input terminal, transmission inner shaft, again may be by outer ring
Reach different effects as output end as input terminal, outer ring as output end or planet carrier as input terminal, planet carrier
Fruit, details are not described herein again；Existing all kinds of motor forms such as external rotor electric machine etc. can be used in the motor 2, is not limited to traditional
Inner rotor motor；
Transmission inner shaft 3 in the present embodiment is not limited to traditional shaft-like structure, and hollow tubular knot can also be used in transmission inner shaft 3
Structure, when being driven the axle sleeve structure that inner shaft is tubular, modes and the input shaft such as settable spline or use interference fit in axle sleeve
Transmission cooperates, and when transmission inner shaft is solid axle construction in the present embodiment, this solid shafting is equally used as input shaft to use, this structure will
It is integrated with input shaft to be driven inner shaft, simplifies the structure of this planet traction wheel system, this planet drawing transmission shaft holds type deceleration
Device carries out the radial support of axis using the normal pressure between transmission inner shaft 3, planet rolling body 5,4 contact surface of outer ring, utilizes transmission
Inner shaft, planet rolling body, the frictional force between the contact surface of outer ring carry out passing movement and power, to realize that epicyclic friction gear passes
Dynamic and bearing function, this planet Traction Drive bearing type speed reducer integrate deceleration and bearing function, compare and use gear
For the retarder of the kind of drive, this planet drawing transmission shaft holds that type speed reducer is simple with structure, bearing smooth running, transmission
When overload can skid and have many advantages, such as automatic antioverloading function, the arrangement planet rolling body of this structure and transmission inner shaft by
Pressure, thus it is not high for the diametric requirements of planet rolling body and transmission inner shaft, relative to the planet traction train we using gear
Case can reduce the radial arrangement size that planet draws train by reducing planet rolling body and being driven the diameter of inner shaft, reduce driving
The overall dimensions of system, so that entire driving system structure is compact；
Multiple groups can be arranged in annular protrusion 7 and annular channel 8 in the present embodiment in the axial direction, be provided in the present embodiment
Two groups, annular protrusion 7 and annular channel 8 can improve the support for being driven inner shaft and planet rolling body and planet rolling body and outer ring
Situation, and improve the bending stiffness of planet Traction Drive bearing type speed reducer, and increase contact connectio improve driving torque and
Power；Annular protrusion 7 may be provided at planet rolling to be justified in vitro, and annular channel 8 may be provided at transmission inner shaft outer circle and outer ring inner circle,
The position of certain annular protrusion 7 and annular channel 8 can also be exchanged, i.e., the setting of annular protrusion 7 is in transmission inner shaft outer circle and outer ring
In inner circle, annular channel 8 is arranged in planet rolling element outer circle, and aforementioned schemes, annular protrusion 7 and annular are used in the present embodiment
The axial cross section of channel 8 can be shapes, annular protrusion 7 and the annular channels such as semicircular arc-shaped, oval arcuation, trapezoidal or triangle
8 cooperation also has certain automatic aligning effect, and using semicircular arc-shaped or oval arcuation section, its aligning effect is particularly evident；
By annular protrusion 7 and the cooperation of annular channel 8 so that this planet traction wheel between planet rolling body 5 and transmission inner shaft 3 and outer ring 4
System can carry axial load, and when carrying axial load, annular protrusion 7 and 8 side wall of annular channel, which are mutually compressed, increases its contact surface
Product increases driving torque instead and improves transmission efficiency；This structure reduces to transmission inner shaft, planet carrier and planet rolling body
The axial positioning structure of equal components, simplifies the structure of retarder, reduces its axial dimension, can further decrease the axis of wheel hub
To arrangement size, make its it is compact-sized be easily installed, reduce the requirement to installation space, increase Installation Flexibility；Pass through
The limitation of the mutual structure of annular protrusion 7 and annular channel 8 can effectively limit row when planet rolling body both ends generate torque difference
The inclination deformation in star rolling element axially direction effectively prevent the generation of vibration, reduces noise, and elimination is got stuck phenomenon, improves
It runs fluency；In axial same straight line size, this structure makes planet rolling body and is driven connecing between inner shaft, outer ring
Contacting surface product increases, and improves the stress state of contact surface, reduces stress concentration, improves transmission power and transmission efficiency；This
In embodiment, transmission inner shaft, planet rolling body, the frictional drive between the contact surface of outer ring answer preferred wet friction to transmit, that is, are rubbing
It wipes between contact surface added with lubricant, to improve transmitting power, while reducing fretting wear, improve efficiency and service life, separately
Outside, axial dimension or the edge that can uniformly extend planet rolling body are contacted with outer ring and transmission inner shaft for guarantee planet rolling body
Axial setting multiple row planet rolling body.
In the present embodiment, the planet Traction Drive bearing type speed reducer is set to the stator of motor 2 or the inner cavity of rotor
In；Under the premise of reducing motor volume, its radial dimension is reduced by the improvement for drawing train to planet, makes it easier to install
In the cavity of motor stator or rotor, solve planet traction train radial dimension it is excessive lead to not with motor stator or turn
Planet Traction Drive bearing type speed reducer is become one with motor, is substantially reduced by the problem of sub- inner cavity matches, this structure
The axial distance of drive system, keeps its compact-sized, improves Installation Flexibility, when assembling with car body, give other zero
There are more installation spaces for part, reduce the difficulty of vehicle space layout；
In the present embodiment, the annular protrusion 7 and annular channel 8 are in an interference fit for generating frictional drive
Normal pressure；The planet Traction Drive bearing type speed reducer of the present embodiment is in assembly, after being driven inner shaft and the combination of planet rolling body
Annular protrusion largest enveloping outer ring diameter slightly larger than the maximum inner diameter of the annular channel on outer ring, that is, there is certain magnitude of interference
Assembly, when the annular ditch of annular protrusion 7 and 8 position of annular channel to timing, after being equally driven inner shaft and the combination of planet rolling body
The diameter of 8 minimum envelop outer ring of road slightly larger than the annular protrusion 7 on outer ring minimum diameter, this structure guarantee annular protrusion 7 with
After annular channel 8 assembles, the two using interference fit, sunk area between the two neighboring annular protrusion 7 of planet rolling body with
And it is gap-matched and is interference fitted between the elevated regions between two neighboring annular channel 8 corresponding with sunk area
, reduce the accuracy of manufacture of components for convenience of the two assembly, clearance fit can be used, mentioned to further increase contact area
Interference fit can be used in high transmission efficiency, when herein using interference fit, adjacent annular protrusion 7 and with it is in-between recessed
Sunken region may be configured as seamlessly transitting, the wavy shaped configuration of sunk area and annular protrusion composition similar to SIN function, this knot
Structure can further increase its contact area and reach higher transmission efficiency, can further limit the deformation of planet rolling body 5, so that
The performance of this bearing type speed reducer various aspects gets a promotion, and specific details are not described herein again；When annular protrusion 7 and annular channel 8 are adopted
When with arc section, as shown in Figures 4 to 6, there are three types of the modes of interference fit, as shown in figure 4, for the straight of annular protrusion 7
Diameter is less than 8 diameter of annular channel, contacts at the wave crest of annular protrusion 7 with being formed at 8 trough of annular channel at this time, when by axial direction
When small offset occurs for the crest location of power annular protrusion 7, its sliding can be made to restore raw bits by the cambered surface of annular channel 8
It sets and reaches aligning effect, the diameter for being illustrated in figure 5 annular protrusion 7 is greater than 8 diameter of annular channel, 7 wave crest two sides of annular protrusion
It is contacted with the formation of 8 cambered surface of annular channel, equally when small offset occurs for the position of annular protrusion 7, annular channel 8 can be passed through
Cambered surface make its sliding restore home position reach aligning effect, as shown in fig. 6, the diameter of annular protrusion 7 be equal to annular channel 8
Diameter, the two is at a fully engaged, this engagement its contact surface of effect is maximum, and transmission power is maximum and aligning effect is best, certainly annular
Similarly there is above-mentioned three kinds of matching relationships when protrusion 7 and annular channel 8 are using other sectional shape structures, it is no longer superfluous herein
It states；
Transmission inner shaft and planet rolling body after assembling in the present embodiment will generate certain compressive deformation, and outer ring generates
Dilatancy, thus pressing force needed for generating planet rolling body friction Traction Drive, when planet rolling body and outer ring and biography
When between dynamic inner shaft using wet friction transmission, transmission inner shaft, planet rolling body, outer peripheral surface should pass through Surface hardening treatment,
Three can be worked after mutually compressing in the very high lubricant of pressure viscosity value index number, and it is strong that contact area generates shearing resistance under high pressure
Very high lubricating oil film is spent, generates frictional traction using the lubricating oil film, to improve transmission power, while reducing friction mill
Damage.
In the present embodiment, the planet rolling body 5 can axially disposed multiple row；Make in planet rolling body and outer ring and transmission
Contact between axis is more uniform, increases the contact area of planet rolling body 5 and Internal and external cycle, reduces the contact of planet rolling body 5
Stress effectively improves the load capacity of speed reduction bearing, can be in adjacent two column planet rolling when planet rolling body 5 is using multiple row
Center row carrier for connecting adjacent two column planet rolling body wheel shaft, or adjustment each column planet rolling body 5 are set between body 5
Assembly magnitude of interference, so as to adjust the transmission power of speed reduction bearing.
In the present embodiment, adjacent two column planet rolling body is circumferentially uniformly staggered along transmission inner shaft；This arrangement
Planet rolling body 5 be can be improved along the density of transmission inner shaft and outer ring circumferential direction, more evenly, transmission is more for the stress for making outer ring and deformation
Steadily.
In the present embodiment, the annular protrusion be located at planet rolling in vitro justify on, the annular channel be located at transmission inner shaft
In outer circle and in the inner circle of outer ring；The size of planet rolling body 5 is less than the size of transmission inner shaft and outer ring in the axial direction, such
The material of required removal when can reduce process component is set, processing efficiency is improved, reduces difficulty of processing.
In the present embodiment, the planet Traction Drive bearing type speed reducer includes the primary planet Traction Drive of two-stage transmission
Bearing type speed reducer and secondary planet Traction Drive bearing type speed reducer；Guaranteeing its axial, lesser feelings of radially installed size
Under condition, higher transmission ratio can reach by the superposition of the reduction ratio of I and II planet Traction Drive bearing type speed reducer, thus
The revolving speed of motor can be improved, and then reduce motor volume, improve power density；
In the present embodiment, the output power of the motor passes sequentially through the biography of primary planet Traction Drive bearing type speed reducer
Move inner shaft, planet carrier exports the transmission inner shaft to secondary planet Traction Drive bearing type speed reducer and it is defeated by power to pass through its outer ring
Its rotation is driven to wheel hub out；The wherein planet carrier of primary planet Traction Drive bearing type speed reducer and secondary planet Traction Drive
The transmission inner shaft of bearing type speed reducer is integrally formed, and the transmission inner shaft and motor of primary planet Traction Drive bearing type speed reducer turn
Son is cooperated by spline drived, and the outer ring of secondary planet Traction Drive bearing type speed reducer connects by the way that screw and wheel hub end face are fixed
Connecing makes the two form transmission cooperation；
In the present embodiment, the outer ring of the primary planet Traction Drive bearing type speed reducer, secondary planet drawing transmission shaft
The stator three of the planet carrier and motor that hold type speed reducer is fixedly connected；This structure simplifies the knot of motor and planetary reduction gear bearing
Structure improves the matched global consistency of the two, so that reaching good matching between each components of whole system, for simplification
Three's structure, which can will be integrally formed, is integrated its highly integrated；It can increase stator core face by above structure optimization
Product, so as to improve the transmission path of the magnetic line of force, improves electromagnetic performance, further increases the power and efficiency of motor；
In the present embodiment, the planet carrier 6 includes two left parts being linked together positioned at 5 axial ends of planet rolling body
Planet carrier and right part planet carrier, what 14 both ends of planet rolling body wheel shaft were rotatably assorted is mounted on two planet carriers；This reality
The left and right portion's planet carrier for applying example, which is bolted, to be integrated, this structure facilitates the installation of retainer, left and right portion's planet carrier pair
Planet rolling body 5 supports, and improves the global consistency of components, in conjunction with the restriction effect of annular protrusion 7 and annular channel 8, into
One step limits 5 run-off the straight of planet rolling body deformation.
Planet Traction Drive bearing type speed reducer in the present embodiment, planet carrier 6 are driven by planet rolling body wheel shaft 14,
The planet carrier 6 is rotatably assorted in transmission inner shaft；Planet rolling body 5 is installed on planet rolling body wheel shaft 14 in the present embodiment,
Planet rolling body wheel shaft is the planet wheel spindle for being used as planet Traction Drive train, planet rolling body wheel shaft 14 and planet rolling body 5
Between bearing realization can be used be rotatably assorted, or process raceway on planet rolling element wheel shaft and to install planet rolling body real
Now it is rotatably assorted；Wherein the structures such as settable spline or shaft coupling and output shaft are sequentially connected on planet carrier 6, certainly, planet carrier 6
Can also be integrally formed with output shaft, to simplify the structure of its link position；
In the present embodiment, at least one set of mutually matched annular rolling is provided between the wheel shaft outer circle and rolling element inner circle
Road 18 is provided with roller 19 in the ring raceway；There are cyclic annular arc-shaped track groove, wheel shaft in wheel shaft outer circle and rolling element inner circle
Track groove in outer circle and rolling element inner circle constitutes ring raceway；Roller, which is located in ring raceway, can bear certain axial force, rolling
Son can be interference fitted with raceway or clearance fit can be born higher when passing through interference fit between roller and raceway
Axial force；And wheel shaft, roller and rolling element three cooperation are provided with the function of bearing, and bearing and each components are integrated
It is integrated, improves structural compactness；The wheel shaft of this structure planet rolling element is mounted on supporting wheel hub on planet carrier, without separately setting
Hub bearing simplifies the overall structure of wheel hub；Multiple row can be axially arranged in wheel shaft outer circle and rolling element inner circle in raceway, by more
Column setting improves its transmission stability and axial force bearing capacity, and details are not described herein again.
As shown in Figure 1,1 both ends of wheel hub are provided with hub rotation cooperation for connecting with vehicle frame in the present embodiment
The left support axis 9 and right support axis 10 connect；Facilitate the assembly of wheel hub and two-wheel vehicle frame by extension supporting axis；
As shown in Figure 1, in the present embodiment, 1 both ends of the wheel hub setting left end cap 11 and right end cap 12, the left end cap 11
Cooperation is driven with wheel hub 1 and left end cap 11 is rotatably assorted with left support axis 9 or the left end cap 11 is rotatably assorted with wheel hub 1
And left end cap 11 and the transmission of left support axis 9 cooperate；The right end cap 12 and the transmission of wheel hub 1 cooperation and right end cap 12 and right support axis
10 are rotatably assorted or the right end cap 12 and wheel hub 1 are rotatably assorted and right end cap 12 and the transmission of right support axis 10 cooperate；This reality
Applying in example is specially that left end cap 11 and left support axis 9 are integrally formed, the collar wall of secondary planet Traction Drive bearing type speed reducer
Axially section is L-shaped for body, and wherein side is bonded other side bending with the inner wall of wheel hub and the left side of wheel hub passes through screw
It is fixedly connected, is provided with rubber closure between the left end cap 11 and the outer ring of secondary planet Traction Drive bearing type speed reducer
13, the right end cap 12 is integrally formed with wheel hub 1, and there are the through-holes passed through for right support axis 10 on right end cap 12, wherein right
Cooperated between support shaft and right end cap 12 by bearing-transmission, right support axis 10 is ladder shaft-like, and the diameter of big journal axle is greater than
Through-hole diameter on right end cap 12 limits right support axis 10 to mobile, convenient to position to it, right end cap on the outside of end cap by the shaft shoulder
There is the bearing block that recess makes its inside form receiving bearing outward on 12, bearing is located at the path in bearing block with right support axis 10
Axis transmission cooperation, the transmission inner shaft of left support axis, right support axis and I and II planet Traction Drive bearing type speed reducer are coaxial
Line setting, wherein the transmission inner shaft end of primary planet Traction Drive bearing type speed reducer and right support axis opposite end pass through bearing
Transmission cooperation, the transmission inner shaft end of same primary planet Traction Drive bearing type speed reducer and secondary planet Traction Drive bearing
The transmission inner shaft of type speed reducer cooperates also by bearing-transmission, by this cooperation so that three mutually supports, reaches good steady
Qualitative, specific fit system can be cooperated by deep groove ball bearing, i.e. the transmission in secondary planet Traction Drive bearing type speed reducer
The bearing block of the end face of inner shaft and right support axis setting recess, the interior assembly bearing of bearing block form transmission cooperation by bearing,
Roller road can be set in three's opposing end surface and ball is set in roller road and form thrust ball bearing realization transmission cooperation, tool
Body is not repeating；Only one end cap is detachable in the left and right end cap of this structure, that is, ensure that the assembly of hub interior components
Convenience, decreasing needs end cap quantity to be mounted, simplifies its assembly process, improves assembly efficiency.
As shown in Figures 2 and 3, this wheel hub structure is suitable for the assembly of four-wheel electric motor car；It is passed in Fig. 2 using primary speed-down
Dynamic, the rotor of motor will be moved by power by the transmission inner shaft of primary planet Traction Drive bearing type speed reducer and by its outer ring
Power exports to wheel hub and drives its rotation, the stator of motor and the fixed company of the planet carrier of primary planet Traction Drive bearing type speed reducer
It connects；The planet carrier of primary planet Traction Drive bearing type speed reducer is used as primary planet Traction Drive bearing type speed reducer simultaneously
Right end cap is used while being used as the connector 15 for connecting with vehicle frame, by this connector can independently with vehicle frame or suspension
Equal components are fixedly connected, and are fixedly connected with brake disc 16 in the outer ring of primary planet Traction Drive bearing type speed reducer, brake disc
It is used cooperatively with brake 17, brake is for being fixedly connected on vehicle frame for applying brake force to brake disc；In Fig. 3, adopt
It is driven with double reduction, the output power of the motor passes sequentially through in the transmission of primary planet Traction Drive bearing type speed reducer
Axis, planet carrier export the transmission inner shaft to secondary planet Traction Drive bearing type speed reducer and are outputted power to by its outer ring
Wheel hub drives its rotation；Outer ring, motor stator and the secondary planet traction of primary planet Traction Drive bearing type speed reducer pass
The planet carrier three of dynamic bearing type speed reducer is fixedly connected, and the planet carrier of secondary planet Traction Drive bearing type speed reducer is made simultaneously
Right end cap for secondary planet Traction Drive bearing type speed reducer uses while making as the connector 15 for connecting with vehicle frame
With can be independently fixedly connected with vehicle frame or suspension by this connector, in the outer of secondary planet Traction Drive bearing type speed reducer
Circle is fixedly connected with brake disc 16, and brake disc is used cooperatively with brake 17, and brake is used for for being fixedly connected on vehicle frame
Brake force is applied to brake disc；
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (10)
1. a kind of planet Traction Drive bearing type reduction electric hub, it is characterised in that: including wheel hub and be set to wheel hub cavity
Intracorporal motor and planet Traction Drive bearing type speed reducer；The motor output power is subtracted by planet Traction Drive bearing type
Fast device is exported to wheel hub and drive hub rotation, and the planet Traction Drive bearing type speed reducer includes transmission inner shaft, outer ring, row
The planet Traction Drive train that star rolling element and planet carrier are collectively formed, the planet rolling in vitro justify outer ring inner circle between with
And planet rolling forms matching pair by annular protrusion and annular channel between circle and transmission inner shaft outer circle in vitro；The planet rolling
Kinetoplast is cooperated by way of frictional drive with transmission inner shaft and outer ring.
2. planet Traction Drive bearing type reduction electric hub according to claim 1, it is characterised in that: the planet is led
Draw drive bearing type speed reducer to be set in the stator of motor or the inner cavity of rotor.
3. planet Traction Drive bearing type reduction electric hub according to claim 1, it is characterised in that: the convex annular
Play the normal pressure for being used to generate frictional drive in an interference fit with annular channel.
4. planet Traction Drive bearing type reduction electric hub according to claim 1, it is characterised in that: the planet rolling
Kinetoplast can axially disposed multiple row.
5. planet Traction Drive bearing type reduction electric hub according to claim 4, it is characterised in that: adjacent two column row
Star rolling element is circumferentially uniformly staggered along transmission inner shaft.
6. planet Traction Drive bearing type reduction electric hub according to claim 1, it is characterised in that: the convex annular
Rise be located at planet rolling in vitro justify on, the annular channel be located at transmission inner shaft outer circle on and outer ring inner circle on.
7. planet Traction Drive bearing type reduction electric hub according to claim 1, it is characterised in that: the planet is led
Draw the primary planet Traction Drive bearing type speed reducer and secondary planet traction biography that drive bearing type speed reducer includes two-stage transmission
Dynamic bearing type speed reducer.
8. planet Traction Drive bearing type reduction electric hub according to claim 7, it is characterised in that: the motor
Output power passes sequentially through the transmission inner shaft of primary planet Traction Drive bearing type speed reducer, planet carrier is exported and led to secondary planet
Draw the transmission inner shaft of drive bearing type speed reducer and wheel hub is outputted power to by its outer ring and drives its rotation.
9. planet Traction Drive bearing type reduction electric hub according to claim 1, it is characterised in that: the planet carrier
The two left part planet carriers and right part planet carrier being linked together including being located at planet rolling body axial ends, the planet rolling
Body and its wheel shaft are rotatably assorted and are mounted on two planet carriers.
10. planet Traction Drive bearing type reduction electric hub according to claim 9, it is characterised in that: the wheel shaft
It is provided at least one set of mutually matched ring raceway between outer circle and rolling element inner circle, is provided with rolling in the ring raceway
Son.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811407558.6A CN109532463A (en) | 2018-11-23 | 2018-11-23 | Planet Traction Drive bearing type reduction electric hub |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811407558.6A CN109532463A (en) | 2018-11-23 | 2018-11-23 | Planet Traction Drive bearing type reduction electric hub |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109532463A true CN109532463A (en) | 2019-03-29 |
Family
ID=65849774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811407558.6A Pending CN109532463A (en) | 2018-11-23 | 2018-11-23 | Planet Traction Drive bearing type reduction electric hub |
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| Country | Link |
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| CN (1) | CN109532463A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111457066A (en) * | 2020-04-09 | 2020-07-28 | 重庆大学 | Bearing type traction speed reducer |
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| SE389403B (en) * | 1974-09-26 | 1976-11-01 | Bjorn Heden Technical Produkts | REDUCTION EXCHANGE, SPECIAL FOR AN ENGINE FOR A CAMERA LENS. |
| JPS538862B1 (en) * | 1971-05-18 | 1978-04-01 | ||
| US5813488A (en) * | 1996-06-14 | 1998-09-29 | Deere & Company | Electric wheel drive for a utility vehicle |
| CN103863105A (en) * | 2012-12-11 | 2014-06-18 | 舍弗勒技术股份两合公司 | Axle for a motor vehicle and corresponding motor vehicle |
| CN106655613A (en) * | 2016-11-24 | 2017-05-10 | 重庆大学 | Double-stage deceleration bearing type wheel hub motor for two-wheel electric vehicle |
| CN106864251A (en) * | 2017-02-14 | 2017-06-20 | 北京理工大学 | Wheel motor drive device |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1737997A (en) * | 1922-08-28 | 1929-12-03 | Garrard Gears Ltd | Means for the transmission of power |
| JPS538862B1 (en) * | 1971-05-18 | 1978-04-01 | ||
| SE389403B (en) * | 1974-09-26 | 1976-11-01 | Bjorn Heden Technical Produkts | REDUCTION EXCHANGE, SPECIAL FOR AN ENGINE FOR A CAMERA LENS. |
| US5813488A (en) * | 1996-06-14 | 1998-09-29 | Deere & Company | Electric wheel drive for a utility vehicle |
| CN103863105A (en) * | 2012-12-11 | 2014-06-18 | 舍弗勒技术股份两合公司 | Axle for a motor vehicle and corresponding motor vehicle |
| CN106655613A (en) * | 2016-11-24 | 2017-05-10 | 重庆大学 | Double-stage deceleration bearing type wheel hub motor for two-wheel electric vehicle |
| CN106864251A (en) * | 2017-02-14 | 2017-06-20 | 北京理工大学 | Wheel motor drive device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111457066A (en) * | 2020-04-09 | 2020-07-28 | 重庆大学 | Bearing type traction speed reducer |
| CN111457066B (en) * | 2020-04-09 | 2021-07-23 | 重庆大学 | Bearing type traction speed reducer |
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Application publication date: 20190329 |
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