CN106555845B - Differential mechanism, power drive system and vehicle - Google Patents
Differential mechanism, power drive system and vehicle Download PDFInfo
- Publication number
- CN106555845B CN106555845B CN201510623387.0A CN201510623387A CN106555845B CN 106555845 B CN106555845 B CN 106555845B CN 201510623387 A CN201510623387 A CN 201510623387A CN 106555845 B CN106555845 B CN 106555845B
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- China
- Prior art keywords
- planetary gear
- planet carrier
- differential mechanism
- gear
- gear ring
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Classifications
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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
- F16H48/00—Differential gearings
- F16H48/06—Differential gearings with gears having orbital motion
- F16H48/10—Differential gearings with gears having orbital motion with orbital spur gears
- F16H48/11—Differential gearings with gears having orbital motion with orbital spur gears having intermeshing planet gears
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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
- F16H48/00—Differential gearings
- F16H48/06—Differential gearings with gears having orbital motion
- F16H48/10—Differential gearings with gears having orbital motion with orbital spur gears
- F16H2048/104—Differential gearings with gears having orbital motion with orbital spur gears characterised by two ring gears
Abstract
The invention discloses a kind of differential mechanism, power drive system and vehicles.Differential mechanism, comprising: first planet carrier, the first planetary gear and the first gear ring, the first planetary gear are arranged in first planet carrier, and the first planetary gear is engaged with the first gear ring；Second planet carrier, the second planetary gear and the second gear ring, the second planetary gear are arranged on the second planet carrier, and the second planetary gear is engaged with the second gear ring and the second planetary gear is also engaged with the first planetary gear；Wherein, the first gear ring and the second gear ring constitute the power output end of differential mechanism, and first planet carrier and the second planet carrier constitute the power intake of differential mechanism.Differential mechanism of the invention utilizes planet differential principle, and space utilization rate is higher in structure and type of attachment, and axial dimension is smaller, and more advantageous in production and fit on.
Description
Technical field
The present invention relates to a kind of differential mechanism, the power drive system with the differential mechanism, with the power drive system
Vehicle.
Background technique
In a kind of differential art known for inventor, differential mechanism include main reducing gear driven gear (it is main subtract it is driven
Gear), planetary gear, centre wheel etc., planetary gear is mounted on the subplate of driven gear by square shaft, axle sleeve, and and center
Wheel engagement realizes its rotation and locomotive function with revolute pair and plane prismatic pair, and centre wheel passes through angular positioning pin and cylindrical pair
Or spline and left and right two halves axis connection, achieve the purpose that output torque.This differential mechanism eliminates original differential mechanism or so shell
The components such as body, planetary gear shaft use the subplate that planetary gear is directly mounted on the driven gear of main reducing gear by square shaft and axle sleeve instead
On, the number of parts of differential mechanism is effectively reduced, structure is simplified, alleviates weight.
But this differential mechanism is utilized symmetrical bevel gear structure and realizes differential between wheel, just for traditional symmetrical
The part of formula bevel differential is innovated, and excessive this differential design axial dimension, shell and cone tooth can not be really solved
The shortcomings that taking turns big quality and reliability relative deviation.
Summary of the invention
The present invention is directed to solve one of above-mentioned technical problem in the prior art at least to a certain extent.
For this purpose, the differential mechanism realizes differential function, structure using planet differential principle the invention proposes a kind of differential mechanism
It is compact, simple.
The invention also provides a kind of power drive systems with the differential mechanism.
The invention also provides a kind of vehicles with the power drive system.
Differential mechanism according to an embodiment of the present invention, comprising: first planet carrier, the first planetary gear and the first gear ring, described
One planetary gear is arranged in the first planet carrier, and first planetary gear is engaged with first gear ring；Second planet carrier,
Two planetary gears and the second gear ring, second planetary gear are arranged on second planet carrier, second planetary gear with it is described
Second gear ring engages and second planetary gear is also engaged with first planetary gear；Wherein, first gear ring and described
Two gear rings constitute the power output end of the differential mechanism, and the first planet carrier and second planet carrier constitute the differential mechanism
Power intake.
Differential mechanism according to an embodiment of the present invention utilizes planet differential principle, the space utilization rate in structure and type of attachment
Higher, axial dimension is smaller, and more advantageous in production and fit on.
In addition, differential mechanism according to an embodiment of the present invention can also have following additional technical feature:
According to some embodiments of the present invention, first planetary gear partially weighs in the axial direction with second planetary gear
It is folded.
According to some embodiments of the present invention, first planetary gear includes: the first teeth portion and the second teeth portion, and described second
Planetary gear includes: third teeth portion and the 4th teeth portion, and first teeth portion is engaged with first gear ring, second teeth portion and institute
It states third teeth portion to correspond to overlapping in the axial direction and engage cooperation, the 4th teeth portion is engaged with second gear ring.
According to some embodiments of the present invention, differential mechanism further include: input shaft and output shaft, the input shaft respectively with institute
First planet carrier is stated to be connected with second planet carrier, the output shaft respectively with first gear ring and the second gear ring phase
Even, the input shaft, the output shaft are coaxially arranged.
According to some embodiments of the present invention, the input shaft includes: the first input shaft and the second input shaft, and described first
Input shaft is connected with the first planet carrier, and second input shaft is connected with second planet carrier, and the output shaft includes:
First output shaft and the second output shaft, first output shaft are connected with first gear ring, second output shaft with it is described
Second gear ring is connected, and first output shaft is coaxially set on first input shaft, and second output shaft is coaxially
It is set on second input shaft.
According to some embodiments of the present invention, the first planet carrier and second planet carrier are configured to circular plate
Shape structure, and the first planet carrier and second planet carrier are split type structure.
According to some embodiments of the present invention, first planetary gear is multiple and circumferentially spaced, described second
Planetary gear be it is multiple and circumferentially spaced, multiple first planetary gears and multiple second planetary gears are respectively correspondingly
Engagement.
According to some embodiments of the present invention, first planetary gear and the second planetary gear are roller gear.
According to some embodiments of the present invention, first gear ring and second gear ring are symmetrical arranged.
According to some embodiments of the present invention, each of first gear ring and second gear ring include: master
Body flat part and be arranged in the body panels portion outer periphery annular side wall portion, set on the inner wall of the annular side wall portion
Multiple teeth are equipped with, cavity, first gear ring and described are limited between the body panels portion and the annular side wall portion
The cavity of two gear rings is toward each other to constitute installation space.
According to some embodiments of the present invention, the first planet carrier and first planetary gear and second planet
Frame and second planetary gear are accommodated in the installation space.
According to some embodiments of the present invention, first gear ring and second gear ring are provided with gap in the axial direction.
According to some embodiments of the present invention, each first planetary gear is configured with first planet wheel spindle, described
Two ends of the first planet wheel spindle are connected with the first planet carrier and second planet carrier respectively, each second row
Star-wheel be configured with second planet wheel spindle, two ends of second planet wheel spindle respectively with the first planet carrier and institute
The second planet carrier is stated to be connected.
According to some embodiments of the present invention, the revolution of the revolution axis and second planetary gear of first planetary gear
Axis is overlapped.
According to some embodiments of the present invention, the public affairs half of the revolution-radius of first planetary gear and second planetary gear
Diameter is identical.
According to some embodiments of the present invention, first planetary gear and second planetary gear are multiple, Duo Gesuo
State the first planetary gear and multiple circumferentially alternating arrangements of second planetary gear, and the first planetary gear and second of arbitrary neighborhood
Planetary gear engagement.
Power drive system according to an embodiment of the present invention, including above-mentioned differential mechanism.
Vehicle according to an embodiment of the present invention, including above-mentioned power drive system.
Detailed description of the invention
Fig. 1 is the explosive view of differential mechanism according to an embodiment of the present invention；
Fig. 2 is the main view of differential mechanism according to an embodiment of the present invention；
Fig. 3 is the plan view schematic diagram of differential mechanism according to an embodiment of the present invention；
Fig. 4 is according to the partial perspective view of the differential mechanism of instinct inventive embodiments, wherein eliminating the first gear ring and first
Planet carrier；
Fig. 5 is the partial front elevation view of differential mechanism according to an embodiment of the present invention, wherein basically illustrating first planet carrier,
One planetary gear and the second planet carrier and the second planetary gear etc.；
Fig. 6 is the mesh schematic representation of the first planetary gear and the second planetary gear；
Fig. 7 is the engagement schematic diagram of the first planetary gear and the second planetary gear；
Fig. 8 is the first gear ring of another embodiment according to the present invention or the perspective view of the second gear ring；
Fig. 9 is the first gear ring of further embodiment according to the present invention or the perspective view of the second gear ring；
Figure 10 is the schematic diagram of power drive system according to an embodiment of the present invention；
Figure 11 is the schematic diagram of vehicle according to an embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of
The description present invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy
Fixed orientation construction and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is at least two, such as two
It is a, three etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected or can communicate with each other；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the interaction relationship of connection or two elements inside two elements.For the ordinary skill in the art,
The specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
Differential mechanism 100 according to an embodiment of the present invention is described in detail below with reference to Fig. 1-Figure 11, the differential mechanism 100
Differential or shaft space difference speed between can be used for taking turns, for for differential between taking turns, which can make driving wheels exist
Vehicle turning traveling is rolled when driving with different angular speed in uneven road surface, pure to guarantee to make between two side drive wheels and ground
Rolling movement.
As shown in Figure 1, differential mechanism 100 according to some embodiments of the invention may include first planet carrier 11, the first row
Star-wheel 12 and the first gear ring 13 and the second planet carrier 21, the second planetary gear 22 and the second gear ring 23.
In conjunction with the embodiment of Fig. 1 and Fig. 5, first planet carrier 11 and the second planet carrier 21 are it is so structured that circular plate
Structure can reduce the axial dimension of differential mechanism 100 to a certain extent in this way.In some embodiments, first planet carrier 11
It can be split type structure with the second planet carrier 21, since the molding of independent widget is relatively easy, by 11 He of first planet carrier
Second planet carrier 21, which is individually processed, can simplify manufacturing process, improves machining accuracy.
Such as shown in Fig. 1, Fig. 3, Fig. 5 and combination Fig. 6-Fig. 7, the first planetary gear 12 is arranged in first planet carrier 11, for example,
Each first planetary gear 12 is configured with first planet wheel spindle 14, and two ends difference of the first planet wheel spindle 14 is rotationally
It is supported in first planet carrier 11 and the second planet carrier 21, two ends of such as the first planet wheel spindle 14 can be turned by bearing
It is supported in the axis hole to correspond to each other on first planet carrier 11 and the second planet carrier 21 dynamicly, the first planetary gear 12 can be fixed at this time
In on corresponding first planet wheel spindle 14.Certainly, two ends of the first planet wheel spindle 14 and first planet carrier 11 and the second row
What carrier 12 was also possible to be fixedly connected, for example, the first planet wheel spindle 14 two ends respectively with first planet carrier 11 and second
The axis hole to correspond to each other on planet carrier 12 is welded and fixed, and the first planetary gear 12 is rotatably sleeved on corresponding first planet at this time
On wheel shaft 14, such as the first planetary gear 12 can be rotatably mounted around on the first planet wheel spindle 14 by bearing.Pass through as a result,
The purpose of connection first planet carrier 11 and the second planet carrier 21 may be implemented in first planet wheel spindle 14, so that first planet carrier
11 and second planet carrier 21 keep movement (i.e. first planet carrier 11 and the second planet carrier 21 linkage) synchronized, in the same direction.And it uses
This connection type, Gu first planet carrier 11 and the second planet carrier 21 well the first planet wheel spindle 14 can support/
It is fixed, prevent the first planet wheel spindle 14 to be disconnected with single planet carrier and differential mechanism 100 is caused to fail.
Shown in Figure 3, the first planetary gear 12 is engaged with the first gear ring 13, concretely internal messing form, i.e. the first row
Star-wheel 12 be located at the inside of the first gear ring 13 and with the tooth engagement on the first gear ring 13.First planetary gear 12 is preferably several, and
And circumferentially equidistantly distributed is in 13 inside of the first gear ring, for example, as a preferred embodiment, the first planetary gear 12 can
It is three, and interval angles are 120 ° between two the first planetary gears 12 of arbitrary neighborhood.
Similarly, such as shown in Fig. 1, Fig. 3, Fig. 5 and combination Fig. 6-Fig. 7, the second planetary gear 22 is arranged in the second planet carrier 21
On, for example, each second planetary gear 22 is configured with second planet wheel spindle 24, two ends of such as the second planet wheel spindle 24 can
It is rotatably supported in the axis hole to correspond to each other in first planet carrier 11 and the second planet carrier 21 by bearing, at this time second
Planetary gear 22 is securable on corresponding second planet wheel spindle 24.Certainly, two ends of the second planet wheel spindle 24 and the first row
What carrier 11 and the second planet carrier 12 were also possible to be fixedly connected, for example, the second planet wheel spindle 24 two ends respectively with first
The axis hole to correspond to each other on planet carrier 11 and the second planet carrier 12 is welded and fixed, and the second planetary gear 22 is rotatably sleeved at this time
On corresponding second planet wheel spindle 24, such as the second planetary gear 22 can be rotatably mounted around the second planet wheel spindle by bearing
On 24.The purpose of connection first planet carrier 11 and the second planet carrier 21 may be implemented by the second planet wheel spindle 24 as a result, thus
So that first planet carrier 11 and the second planet carrier 21 keep movement synchronized, in the same direction.And use this connection type, the first planet
Frame 11 and the second planet carrier 21 can support/fix to the second planet wheel spindle 24 well, prevent the second planet wheel spindle 24
It is disconnected with single planet carrier and differential mechanism 100 is caused to fail.
In addition, in other embodiments of the invention, in order to keep first planet carrier 11 and the second planet carrier 21 can
At the same speed, it moves, can also be directly fixedly connected with first planet carrier 11 with the second planet carrier 21 by intermediate member, also in the same direction
It is to say, synchronized, the in the same direction movement of first planet carrier 11 and the second planet carrier 21 can be through the first planet in above example
Wheel shaft 14 and the second planet wheel spindle 24 are realized, and the embodiment directly can realize the first planet by setting intermediate member
The movement synchronized, in the same direction of frame 11 and the second planet carrier 21, such as the intermediate member can be located at first planet carrier 11 and the second row
It is welded and fixed between carrier 21 and respectively with first planet carrier 11 and the second planet carrier 21.
Shown in Figure 3, the second planetary gear 22 is engaged with the second gear ring 23, concretely internal messing form, i.e. the second row
Star-wheel 22 be located at the inside of the second gear ring 23 and with the tooth engagement on the second gear ring 23.Second planetary gear 22 is preferably several, and
And circumferentially equidistantly distributed is in 23 inside of the second gear ring, for example, as a preferred embodiment, the second planetary gear 22 can
It is three, and interval angles are 120 ° between two the second planetary gears 22 of arbitrary neighborhood.
Wherein, it should be noted that Fig. 3 is the plan view schematic diagram according to the differential mechanism 100 of the embodiment of the present invention, wherein
Schematically show the meshing relation and the first planetary gear 12 and first between the first planetary gear 12 and the second planetary gear 22
The meshing relation of gear ring 13, the second planetary gear 22 and the second gear ring 23, since Fig. 3 is plan view, and at the same time showing above-mentioned
Three kinds of meshing relations, therefore the relative positional relationship of each component is only illustrative, and is not offered as or implies the reality of each component
Space layout position.
It is in multiple embodiments in the first planetary gear 12 and the second planetary gear 22, it is preferable that multiple first planetary gears
12 and multiple second planetary gears 22 respectively correspondingly engage.For example, as shown in Figure 1 and Figure 4, the first planetary gear 12 and the second planet
Wheel 22 is three, then first the first planetary gear 12 can be engaged with corresponding first the second planetary gear 22, and second first
Planetary gear 12 can be engaged with corresponding second the second planetary gear 22, and third the first planetary gear 12 can be with corresponding third the
, there is the first planetary gear 12 and the second planetary gear 22 that multiple groups are engaged with each other in the engagement of two planetary gears 22, pass in differential mechanism 100 in this way
When defeated power, power multiple groups correspond to each other engagement the first planetary gear 12 and the second planetary gear 22 between transmitting will be more steady
It is fixed, reliable.
In addition, being another multiple embodiments, multiple first planets in the first planetary gear 12 and the second planetary gear 22
Wheel 12 and the circumferentially alternating arrangement of multiple second planetary gears 22, and the first planetary gear 12 and the second planetary gear 22 of arbitrary neighborhood
Engagement.That is, in this embodiment, multiple first planetary gears 12 and the circumferentially alternating arrangement of multiple second planetary gears 22 are simultaneously
An annular is formed, two the second planetary gears 22 engagement adjacent thereto of each first planetary gear 12, similarly, each
Second planetary gear 22, two the first planetary gears 12 engagement all adjacent thereto.
Wherein, referring to the embodiment of Fig. 3, the revolution axes O of the revolution axes O of the first planetary gear 12 and the second planetary gear 22
It is overlapped, and revolution-radius (the i.e. central axis distance revolution axes O of planetary gear of the first planetary gear 12 and the second planetary gear 22
Distance) it is identical.
Particularly, as shown in Fig. 1-Fig. 2, Fig. 4-Fig. 7, the first planetary gear 12 engages cooperation with the second planetary gear 22.Change speech
It is not only engaged with the first gear ring 13 for the first planetary gear 12, while also being engaged with the second planetary gear 22, for
It for second planetary gear 22, not only engages with the second gear ring 23, while also being engaged with the first planetary gear 12.
As shown in figure 3, the first gear ring 13 and the second gear ring 23 may be constructed two power output ends of differential mechanism 100, the
One planet carrier 11 and the second planet carrier 21 then correspond to the power intake for constituting differential mechanism 100 (for example, first planet carrier 11 at this time
Can be rigidly connected with the second planet carrier 21), the power of such external power supply output can be from 11 He of first planet carrier
The input of second planet carrier 21 can be exported from the first gear ring 13 and the second gear ring 23 respectively after the differential action of differential mechanism 100.
At this point, first planet carrier 11 and the second planet carrier 21 can connect the power such as engine, motor as optional embodiment
Source, the first gear ring 13 and the second gear ring 23 can be connected by gear transmission structure and corresponding semiaxis, semiaxis again with corresponding vehicle
Wheel is connected, but not limited to this.
Differential between taking turns is applied to the differential mechanism 100 below, the first gear ring 13 and the second gear ring 23 constitute differential mechanism 100
Simple declaration is poor for the power intake of power output end, first planet carrier 11 and the second planet carrier 21 composition differential mechanism 100
The working principle of fast device 100, wherein the first gear ring 13 can be connected by such as gear transmission structure with left half axle at this time, left half axle
It can be connected with left side wheel, the second gear ring 23 can be connected by such as gear transmission structure with right axle shaft, and right axle shaft can be with right side
Wheel is connected, and the power of power source such as engine and/or motor output can be by exporting after the decelerating effect of main reducing gear to the
One planet carrier 11 and the second planet carrier 21.If vehicle driving is turned on smooth road surface and not at this time, left side wheel and right side
Theoretically revolving speed is identical for wheel, and differential mechanism 100 does not play differential action at this time, first planet carrier 11 and the second planet carrier it is 21 synchronized,
It rotates in same direction, the first gear ring 13 and the second gear ring 23 are synchronized, rotate in same direction, 22 public affairs of the first planetary gear 12 and the second planetary gear
Turn, not rotation.If vehicle driving travels on the road surface of out-of-flatness or vehicle turning at this time, left side wheel and right side wheels are theoretical
Upper revolving speed is different, and the revolving speed of the first gear ring 13 and the second gear ring 23 is also different, that is, there is rotational speed difference, at this time 12 He of the first planetary gear
The change of team certainly of also rotation while revolution of second planetary gear 22, the first planetary gear 12 and the second planetary gear 22 is so that the first gear ring
13 and second speedup in gear ring 23, another deceleration, the rotational speed difference of the gear ring of the gear ring and deceleration of speedup is left and right
The rotational speed difference of wheel, to realize differential action.
To sum up, differential mechanism 100 according to an embodiment of the present invention utilizes planet differential principle, in structure and type of attachment overhead
Between utilization rate it is higher, axial dimension is smaller, and production and fit on it is more advantageous.Such structure type not only can be with
Avoid angular wheel axially and radially on dimensional defects, additionally can preferably using master subtract in driven gear inside
Preferably space utilization rate is realized in empty space, greatly facilitates the arrangement of 100 assembly of differential mechanism and big to weight
Small limitation, while also having higher reliability and more preferably transmission efficiency, be conducive to improve the reliable of power chain
Property and it is excessively curved when power output fluency, this for symmetrical bevel differential have more practicability.
The first row star-wheel 12 and the meshing relation of the second planetary gear 22 are described in detail in conjunction with specific embodiments below.
Referring to shown in Fig. 3, Fig. 5-Fig. 7, the first planetary gear 12 and the second planetary gear 22 are on axial direction (left and right directions in Fig. 7)
It partly overlapping, that is to say, that the first planetary gear 12 only overlaps with the second planetary gear 22, and part in addition is staggered, and first
The part that the part of planetary gear 12 and the overlapping of the second planetary gear 22 can be engaged with each other, and be staggered can then be engaged with respective gear ring.
Specifically, in conjunction with shown in Fig. 6 and Fig. 7, the first planetary gear 12 may include the first teeth portion 151 and the second teeth portion 152
(using K2 dotted line in Fig. 7 as line of demarcation), the second planetary gear 22 may include third teeth portion 153 and the 4th teeth portion 154 (in Fig. 7
K1 dotted line is line of demarcation), the second teeth portion 152 and third teeth portion 153 constitute lap, i.e. the second teeth portion 152 and third teeth portion
153 overlappings corresponding in the axial direction and engagement cooperation, the first teeth portion 151 and the 4th teeth portion 154 be staggered in the axial direction and with it is respectively right
The gear ring engagement answered, i.e., the first teeth portion 151 is engaged with the first gear ring 13, and the 4th teeth portion 154 is engaged with the second gear ring 23.
As a result, the axial dimension of differential mechanism 100 is more compact, the volume of differential mechanism 100 is more compact, is conducive to differential
The installation of device 100, arrangement.
The power intake to differential mechanism 100 and power output end are described in detail in conjunction with specific embodiments below.
As shown in connection with fig. 3, differential mechanism 100 further includes input shaft 31,32 and output shaft 41,42, input shaft 31,32 respectively with
First planet carrier 11 is connected with the second planet carrier 21, such as in the example of fig. 3, the left side of first planet carrier 11 be connected with one it is defeated
Enter axis 31, the right side of the second planet carrier 21 is connected with another 32 input shaft.Output shaft 41,42 respectively with the first gear ring 13 and
Two gear rings 23 are connected, and such as in the example of fig. 3, the left side of the first gear ring 13 is connected with an output shaft 41, the second gear ring 23
Right side is connected with another output shaft 42.Input shaft 31,32, the 41,42, first gear ring 13 of output shaft and the second gear ring 23 can be coaxial
Arrangement.
Further, as shown in figure 3, input shaft includes: the first input shaft 31 and the second input shaft 32, the first input shaft 31 with
First planet carrier 11 is connected, and the second input shaft 32 is connected with the second planet carrier 21, and output shaft may include: 41 He of the first output shaft
Second output shaft 42, the first output shaft 41 are connected with the first gear ring 13, and the second output shaft 42 is connected with the second gear ring 23, and first is defeated
Entering axis 31 and the second input shaft 32 and the first output shaft 41 and the second output shaft 42 can be hollow shaft structure, wherein as excellent
The embodiment of choosing, the first output shaft 41 are coaxially set on the first input shaft 31, and the second output shaft 42 is coaxially set in
On second input shaft 32, thus 100 structure of differential mechanism is more compact, volume is smaller.
According to some embodiments of the present invention, the number of teeth of the first gear ring 13 is equal with the number of teeth of the second gear ring 23, the first row
The number of teeth of star-wheel 12 is equal with the number of teeth of the second planetary gear 22.
According to some embodiments of the present invention, the first planetary gear 12 and the second planetary gear 22 are roller gear, compared to biography
Unite symmetrical bevel differential, it is more compact using 100 structure of differential mechanism of roller gear, specifically, its in structure and
Space utilization rate is higher in type of attachment, and axial dimension is smaller, and more advantageous in production and fit on.
The structure of the first gear ring 13 and the second gear ring 23 is described in detail combined with specific embodiments below.
In some embodiments of the invention, the first gear ring 13 and the second gear ring 23 are symmetrical structure, in other words, the first tooth
Circle 13 and the second gear ring 23 are symmetrical arranged, and can be increased the versatility of gear ring in this way, be reduced cost.
Specifically, such as Fig. 1 and as shown in connection with fig. 3, each of the first gear ring 13 and the second gear ring 23 include: main body
The annular side wall portion 162 of flat part 161 and the outer periphery that body panels portion 161 is set, body panels portion 161 and annular sidewall
Portion 162 can be integrated molding component.Be provided with multiple gear teeth on the inner wall of annular side wall portion 162, body panels portion 161 with
Cavity A1, A2 is limited between annular side wall portion 162 (referring to Fig. 3), that is to say, that the body panels portion 161 of the first gear ring 13
Cavity A1 is limited between annular side wall portion 162, between the body panels portion 161 and annular side wall portion 162 of the second gear ring 23
Cavity A2 is limited, the cavity A2 in cavity A1 and the second gear ring 23 in the first gear ring 13 is toward each other to constitute installation space
A (referring to Fig. 3), wherein first planet carrier 11 and the first planetary gear 12 and the second planet carrier 21 and the second planetary gear 22 are accommodated in
In installation space A, so that the structure of differential mechanism 100 is relatively more compact, it is smaller to occupy volume, it is easier to arrange, simultaneously
First gear ring 13 and the second gear ring 23 serve as the function of external shell, can protect and be accommodated in planet carrier and planetary gear therein,
Improve the service life.In addition, the installation space A that the first gear ring 13 and the second gear ring 23 are limited comparatively is closed, external sundries
It is not easily accessible in installation space A and influences moving component, ensure that the steady operation of differential mechanism 100.
As shown in connection with fig. 2, the first gear ring 13 and the second gear ring 23 are provided with clearance D in the axial direction, that is to say, that the first tooth
Circle 13 is separated from each other in the axial direction with the second gear ring 23, not fits closely.To those skilled in the art, due to
The width of the engaging portion of one planetary gear 12 and the second planetary gear 22 determines the size of the clearance D, i.e. the first planetary gear 12 with
The width of the engaging portion of second planetary gear 22 is equal with the minimum value of the clearance D, therefore passes through control 12 He of the first planetary gear
The width of second planetary gear, 22 engaging portion, can indirectly control the size of the clearance D, to those skilled in the art,
Guaranteeing that the first planetary gear 12 and the second planetary gear 22 being capable of stable delivery power and the first planetary gears 12 and the second planetary gear
Under the premise of 22 service life, the width of the first planetary gear 12 and the engaging portion of the second planetary gear 22 can be arranged opposite
It is relatively narrow, the clearance D can be effectively reduced in this way, so that the axial dimension of differential mechanism 100 is smaller, more compact, be easy to arrange.
It should be noted that the clearance D of above-mentioned Fig. 3 (in conjunction with Fig. 1-Fig. 2) refers to the annular side wall portion of the first gear ring 13
162 and second gear ring 23 the distance between annular side wall portion 162.For example, see the embodiment of Fig. 1, Fig. 2 and Fig. 3, the first tooth
Circle 13 and the second gear ring 23 all include body panels portion 161 and annular side wall portion 162.
And in other embodiments of the invention, in the embodiment such as referring to Fig. 8 and Fig. 9, the first gear ring 13 and second
Each of gear ring 23 still further comprises annular flange portion 163, and annular flange portion 163 is from the end face of annular side wall portion 162
Extend to the direction far from body panels portion 161, in the embodiment in fig. 8, the internal diameter of annular flange portion 163 can be with annular sidewall
The outer diameter in portion 162 is generally equalized, and such annular flange portion 163 is equivalent to radially protrudes outward annular side wall portion 162 (i.e.
The outer peripheral surface of one gear ring 13 or the second gear ring 23).And in the embodiment in fig. 9,163 outer diameter of annular flange portion can be with annular sidewall
The outer diameter in portion 162 is generally equalized, and the internal diameter of annular flange portion 163 can be greater than the internal diameter of annular side wall portion 162, that is,
It says, the thickness of annular flange portion 163 is more thinner than the thickness of annular side wall portion 162.
However, it is desirable to illustrate, the clearance D in the gear ring structure of Fig. 1, Fig. 2 and Fig. 3 embodiment, between two gear ring
Refer to the gap between the annular side wall portion 162 of two gear rings.And the gear ring structure in Fig. 8 and Fig. 9 embodiment, two gear ring
Between clearance D refer to two gear rings annular flange portion 163 between gap.
According to some embodiments of the present invention, since the first gear ring 13 and/or the second gear ring 23 can further include
Annular flange portion 163, due to the presence of annular flange portion 163, compares no annular flange portion when using this gear ring structure
Above-mentioned clearance D can be at least partly further decreased for 163 gear ring, and preferably, which can reduce to zero,
Such as first gear ring 13 and the second gear ring 23 can use gear ring structure shown in Fig. 8 simultaneously, the annular of the first gear ring 13 at this time
The end face of the annular flange portion 163 of flange part 163 and the second gear ring 23 can fit together substantially, so that clearance D is
Zero, such installation space A is more closed, and external sundries is more difficult to enter in installation space A and influence moving component, ensure that difference
The steady operation of fast device 100.However, it is to be understood that explanation here is only illustrative, it is not to be construed as to this hair
A kind of limitation of bright protection scope, those skilled in the art are being understood by setting convex annular after having read above content
After edge 163 can further decrease the technical concept that clearance D is even decreased to zero by clearance D, gear ring can be neatly selected
Type be combined, such as guarantee wherein at least one gear ring have annular flange portion 163, in this way can be further by gap
D, which reduces, is even reduced into zero for clearance D, so that installation space A is more closed.
In addition, the first gear ring 13 is identical with the radial dimension of the second gear ring 23, and the first tooth as optional embodiment
Each of circle 13 and the second gear ring 23 may each be integrated molding component.
In addition, for technical solution described in the various embodiments described above and/or technical characteristic, do not conflict with each other, not phase
In mutual contradictory situation, those skilled in the art can be by the technical solution and/or technical characteristic progress phase in above-described embodiment
Mutually combination, the technical solution after combination can be the superposition of two or more technical solutions, two or more technologies
The superposition of feature or two or more technical solutions are superimposed with technical characteristic, and thus, it is possible to realize each technical solution
And/or the interaction and support of technical characteristic each other functionally, and the scheme after combination is imitated with more superior technology
Fruit.
For example, those skilled in the art can be by the first planetary gear 12 and the partly overlapping scheme of the second planetary gear 22 and first
Planet carrier 11 and the second planet carrier 21 are that the scheme of plate structure combines, and can effectively reduce the axial ruler of differential mechanism 100 in this way
It is very little, to keep the volume of differential mechanism 100 smaller.
For another example, those skilled in the art can be by the first planetary gear 12 and the partly overlapping scheme of the second planetary gear 22 and planet
Wheel and planet carrier are accommodated in the combination of the scheme in installation space, not only can effectively reduce the axial ruler of differential mechanism 100
It is very little, and planetary gear and planet carrier can also be made to be hidden in installation space and avoid leaking cruelly being damaged outside, so that increasing makes
With the service life, maintenance cost is reduced.
For another example, those skilled in the art can be by the revolution axis of the revolution axis and the second planetary gear 22 of the first planetary gear 12
The scheme of coincidence is combined with the revolution-radius of the first planetary gear 12 with the identical scheme of revolution-radius of the second planetary gear 22, in this way
So that the structure of differential mechanism 100 is more compact, occupancy volume is smaller, is more convenient for arranging.
However, it is to be understood that above-mentioned illustrating is only illustrative, it is special for technical solution and/or technology
The combination of sign, those skilled in the art can be freely combined in the absence of conflict, and the scheme after combination has
More superior technical effect, the present invention have only made above-mentioned multiple exemplary simple declarations, no longer exhaustive one by one herein.
Further it will be understood that the technical solution after said combination is equally fallen under the scope of the present invention.
Generally speaking, differential mechanism 100 according to an embodiment of the present invention, can effectively save space, and reduce weight, tool
For body, for this planet gear type differential mechanism 100 compares traditional bevel gear differential, weight can be reduced about
30%, while axial dimension about reduces 70%, can not only reduce the frictional force of bearing, and can be realized left and right wheels
Torque distribution is distributed the load of differential mechanism 100 more reasonable, and 100 rigidity of differential mechanism is more preferable, additionally due to using Cylinder Gear
Wheel, transmission efficiency is also increased, such as traditional Bevel Gear Drive efficiency of 6 class precisions and 7 class precisions is about 0.97
~0.98, and the column gear transmission efficiency of 6 class precisions and 7 class precisions is about 0.98~0.99, furthermore uses roller gear, also
The operating noise of differential mechanism 100 is reduced, while reducing calorific value, substantially increases the service life of differential mechanism 100.In short,
Differential mechanism 100 according to an embodiment of the present invention have lightweight, small size, at low cost, transmission efficiency is high, low noise, fever it is small,
Many advantages, such as service life is high.
Simultaneously as differential mechanism 100 according to an embodiment of the present invention can save sun gear, and saving sun gear can have
It has the following advantages:
It is analyzed from mechanics, cancel sun gear but gear ring is utilized to realize differential, because the number of teeth of gear ring compares sun gear
What be can be set is more, while pitch circle is larger (pitch circle refers to a pair of circle tangent at node when gear engaged transmission), from
And can be more balanced distributed load and bear torque, this is good to the raising in the service life of differential mechanism 100.Do not have simultaneously
Sun gear can preferably realize the lubrication and cooling of differential mechanism 100, that is to say, that due to eliminating sun gear, planet
Wheel the inside can form cavity, and it is to belong to the relationship of internal messing (sun gear belongs to outside with planetary gear that gear ring engage with planetary gear
Engagement), lubricating oil can be stored in gear ring, thus cooling and lubricant effect can greatly improve.In addition, due to cancelling sun gear,
Reduce components, reduce the quality and cost of differential mechanism 100, differential mechanism 100 is made to become more miniaturization, lightweight.
Power drive system 1000 according to an embodiment of the present invention is briefly described below, which includes
Differential mechanism 100 in above-described embodiment.As shown in connection with fig. 10, power drive system 1000 includes differential mechanism 100, speed changer 200
It exports after the chronotropic action for passing through speed changer 200 with power source 300, the power that power source 300 exports to differential mechanism 100, then by
Differential mechanism 100 distributes to the driving wheel of two sides.It is understood that the power drive system 1000 shown in Figure 10 is only that one kind is shown
Example, is not a kind of limitation to the scope of the present invention.However, it should be understood that power according to an embodiment of the present invention
Other constructions such as engine, speed changer of transmission system etc. have been the prior art, and are well known to those skilled in the art,
Therefore it no longer repeats one by one here.
It is shown in Figure 11, vehicle 10000 according to an embodiment of the present invention is briefly described below, which includes
Power drive system 1000 in above-described embodiment, the power drive system 1000 can be used for forerunner, naturally it is also possible to be used for
Rear-guard, the present invention are not particularly limited this.It should be understood that other constructions of vehicle according to an embodiment of the present invention are for example
Braking system, driving system, steering system etc. have been the prior art, and are well known to those skilled in the art, therefore here
No longer repeat one by one.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
What can be combined in any suitable manner in one or more embodiment or examples.In addition, those skilled in the art can say this
Different embodiments or examples described in bright book are engaged and are combined.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (17)
1. a kind of differential mechanism characterized by comprising
First planet carrier, the first planetary gear and the first gear ring, first planetary gear is arranged in the first planet carrier, described
First planetary gear is engaged with first gear ring；
Second planet carrier, the second planetary gear and the second gear ring, second planetary gear is arranged on second planet carrier, described
Second planetary gear is engaged with second gear ring and second planetary gear is also engaged with first planetary gear；
Wherein, first gear ring and second gear ring constitute two power output ends of the differential mechanism, the first row
Carrier and second planet carrier constitute the power intake of the differential mechanism；
Input shaft and output shaft, the input shaft is connected with the first planet carrier and second planet carrier respectively, described defeated
Shaft is connected with first gear ring and second gear ring respectively, and the input shaft, the output shaft are coaxially arranged.
2. differential mechanism according to claim 1, which is characterized in that first planetary gear and second planetary gear are in axis
It partly overlaps upwards.
3. differential mechanism according to claim 2, which is characterized in that first planetary gear includes: the first teeth portion and second
Teeth portion, second planetary gear include: third teeth portion and the 4th teeth portion, and first teeth portion is engaged with first gear ring, institute
State the corresponding overlapping and engagement cooperates, the 4th teeth portion and described second in the axial direction of the second teeth portion and the third teeth portion
Gear ring engagement.
4. differential mechanism according to claim 1, which is characterized in that the input shaft includes: that the first input shaft and second are defeated
Enter axis, first input shaft is connected with the first planet carrier, and second input shaft is connected with second planet carrier, institute
Stating output shaft includes: the first output shaft and the second output shaft, and first output shaft is connected with first gear ring, and described second
Output shaft is connected with second gear ring, and first output shaft is coaxially set on first input shaft, and described second
Output shaft is coaxially set on second input shaft.
5. differential mechanism according to claim 1, which is characterized in that the first planet carrier and the equal structure of the second planet carrier
It makes as circular plate structure, and the first planet carrier and second planet carrier are split type structure.
6. differential mechanism according to claim 1, which is characterized in that first planetary gear is multiple and circumferentially spaced points
Cloth, second planetary gear are multiple and circumferentially spaced, multiple first planetary gears and multiple second planets
Wheel respectively correspondingly engages.
7. differential mechanism according to claim 1, which is characterized in that first planetary gear and the second planetary gear are cylinder
Gear.
8. differential mechanism according to claim 1, which is characterized in that first gear ring and second gear ring are symmetrically set
It sets.
9. differential mechanism according to claim 8, which is characterized in that each in first gear ring and second gear ring
It is a to include:
The annular side wall portion in body panels portion and the outer periphery that the body panels portion is set, the inner wall of the annular side wall portion
It is provided with multiple teeth on face, cavity is limited between the body panels portion and the annular side wall portion, first gear ring
The cavity of cavity and second gear ring is toward each other to constitute installation space.
10. differential mechanism according to claim 9, which is characterized in that the first planet carrier and first planetary gear with
And second planet carrier and second planetary gear are accommodated in the installation space.
11. differential mechanism according to claim 1, which is characterized in that first gear ring and second gear ring are in axial direction
On be provided with gap.
12. differential mechanism according to claim 1, which is characterized in that each first planetary gear is configured with one first
Two ends of planet wheel spindle, first planet wheel spindle are connected with the first planet carrier and second planet carrier respectively,
Each second planetary gear be configured with second planet wheel spindle, two ends of second planet wheel spindle respectively with it is described
First planet carrier is connected with second planet carrier.
13. differential mechanism according to claim 1, which is characterized in that the revolution axis of first planetary gear and described the
The revolution axis of two planetary gears is overlapped.
14. differential mechanism according to claim 1, which is characterized in that the revolution-radius of first planetary gear and described the
The revolution-radius of two planetary gears is identical.
15. differential mechanism according to claim 1, which is characterized in that first planetary gear and second planetary gear are equal
To be multiple, multiple first planetary gears and multiple circumferentially alternating arrangements of second planetary gear, and the of arbitrary neighborhood
One planetary gear and the engagement of the second planetary gear.
16. a kind of power drive system, which is characterized in that including differential mechanism described according to claim 1 any one of -15.
17. a kind of vehicle, which is characterized in that including power drive system according to claim 16.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510623387.0A CN106555845B (en) | 2015-09-25 | 2015-09-25 | Differential mechanism, power drive system and vehicle |
| PCT/CN2016/098895 WO2017050158A1 (en) | 2015-09-25 | 2016-09-13 | Differential, power transmission system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510623387.0A CN106555845B (en) | 2015-09-25 | 2015-09-25 | Differential mechanism, power drive system and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106555845A CN106555845A (en) | 2017-04-05 |
| CN106555845B true CN106555845B (en) | 2019-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510623387.0A Active CN106555845B (en) | 2015-09-25 | 2015-09-25 | Differential mechanism, power drive system and vehicle |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106555845B (en) |
| WO (1) | WO2017050158A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109488734A (en) * | 2017-09-13 | 2019-03-19 | 三多乐精密注塑(深圳)有限公司 | A kind of planetary gear transmission mechanism |
| CN114321318B (en) * | 2020-09-30 | 2024-03-19 | 比亚迪股份有限公司 | Multifunctional differential mechanism and automobile |
| CN113048213A (en) * | 2021-02-05 | 2021-06-29 | 东风越野车有限公司 | Transfer case planetary gear interaxial differential and gear planet carrier thereof |
| CN113212158A (en) * | 2021-06-07 | 2021-08-06 | 银川威力传动技术股份有限公司 | Coaxial planetary power transmission axle and new energy automobile using same |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2060831U (en) * | 1989-11-16 | 1990-08-22 | 河北省冶金设计研究院 | Inter-tooth planet differential gearing |
| JP3014641B2 (en) * | 1996-04-17 | 2000-02-28 | 建治 三村 | Differential device |
| CN2420167Y (en) * | 2000-04-29 | 2001-02-21 | 王庆堂 | Planetary differentical stepless speed changing mechanism |
| TW201009224A (en) * | 2008-08-26 | 2010-03-01 | Kuo-Ming Lee | Limited slip differential (LSD) with cylinder gear set |
| DE102012207498A1 (en) * | 2012-05-07 | 2013-11-07 | Schaeffler Technologies AG & Co. KG | Spur gear differential unit, has supporting element provided at inner space of respective ring gear, and spin structure that carriers or supports over which spur gear pin front-sided lining up is radially supported at supporting element |
| DE102012216404A1 (en) * | 2012-09-14 | 2014-03-20 | Schaeffler Technologies AG & Co. KG | Spur gear differential for use as distributor gear for distributing drive power between front and rear axles of vehicle, has axles whose angular distances are defined on pitch circle so that integral multiple of angle value represents value |
| DE102012216413A1 (en) * | 2012-09-14 | 2014-03-20 | Schaeffler Technologies AG & Co. KG | Gear wheel structure for self-statically gear box device of differential spur gear, has two gear units that are arranged so that circumferential displacement of toothed rings is rotationally fixed on pin external teeth of post unit |
| DE102012219212A1 (en) * | 2012-10-22 | 2014-04-24 | Schaeffler Technologies Gmbh & Co. Kg | Spur gear differential for use as e.g. distribution, branching, and axle differential gear box in motor car, has coupling and circulation planetary parts formed such that cladding circle is smaller than addendum circle of teeth |
| CN104276026B (en) * | 2014-01-30 | 2015-09-02 | 比亚迪股份有限公司 | For vehicle power drive system and there is its vehicle |
-
2015
- 2015-09-25 CN CN201510623387.0A patent/CN106555845B/en active Active
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2016
- 2016-09-13 WO PCT/CN2016/098895 patent/WO2017050158A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN106555845A (en) | 2017-04-05 |
| WO2017050158A1 (en) | 2017-03-30 |
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