CN108240452A - Differential mechanism and vehicle - Google Patents

Abstract

The invention discloses a kind of differential mechanism and vehicle, differential mechanism includes：Two planetary gear mechanisms, gear ring are power output end, and input unit, input unit, two planet carriers are coaxially arranged and input unit links respectively with two planet carriers；Power engagement device, power engagement device include the first and second joint portions, and the first joint portion is connected with one in two gear rings, and the second joint portion is rotated synchronously with two planet carriers；Joint portion driving device, joint portion driving device include：Needle and driving portion are driven, driving portion is arranged for driving driving needle and the second joint portion is driven to be moved in an axial direction to close to the direction at the first joint portion, so as to which the second joint portion be made to engage the first joint portion.Differential mechanism can improve the ability of getting rid of poverty of vehicle with two semiaxis of locking in this way.

Description

Differential mechanism and vehicle

Technical field

The present invention relates to technical field of vehicle more particularly to a kind of differential mechanism and with the differential mechanism vehicle.

Background technology

In the relevant technologies, new-energy automobile employs distributed type of drive, and both sides wheel is respectively driven by two motors, Rotating speed, the torque of left and right wheel can independently be adjusted by controller, are eliminated differential mechanism in this way, but easily beaten certain Still need locking left and right half under ways condition to improve trafficability.It if should by traditional electric locking formula differential mechanism For the new-energy automobile of distribution driving, then the differential function of differential mechanism, and traditional electric locking formula differential are wasted Device is complicated, and parts are more, and occupied space is more.

Invention content

The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the present invention carries Go out a kind of differential mechanism, which can realize two semiaxis of locking, can promote the ability of getting rid of poverty of vehicle.

The present invention further proposes a kind of vehicle.

Differential mechanism according to the present invention, including：First planet carrier, the first planetary gear and the first gear ring, first planet Wheel is connected with the first planet carrier, and first planetary gear is engaged with first gear ring；Second planet carrier, the second planetary gear With the second gear ring, second planetary gear is connected with second planet carrier, and second planetary gear is nibbled with second gear ring It closes and second planetary gear is also engaged with first planetary gear, wherein, first gear ring and second gear ring are formed Two power output ends of the differential mechanism；Input unit, the input unit, the first planet carrier and second planet carrier are same Axis is arranged and the input unit links respectively with the first planet carrier and second planet carrier；Power engagement device, it is described Power engagement device includes the first joint portion and the second joint portion, first joint portion and first gear ring and the second gear ring In one be connected, second joint portion and the first planet carrier and second planet carrier rotate synchronously；It drives at joint portion Dynamic device, the joint portion driving device include：Needle and driving portion are driven, the driving needle is arranged to can be with first planet Frame and second planet carrier can be moved axially around center axis thereof and with respect to first planet carrier and second planet carrier, institute The both ends for stating driving needle coordinate respectively with the driving portion and second joint portion, and the driving portion is arranged for driving institute Stating driving needle drives second joint portion to be moved along the axial direction to the direction close to first joint portion, described so as to make Second joint portion engages first joint portion.

Differential mechanism according to the present invention, after joint portion driving device drives the second joint portion to be engaged with the first joint portion, The output speed of first gear ring and the second gear ring is identical, so as to realize the synchronization locking of two semiaxis, can be conducive to carry Rise the ability of getting rid of poverty of vehicle.

Vehicle according to the invention, including above-mentioned differential mechanism.

Description of the drawings

Fig. 1 is the explosive view of differential mechanism according to embodiments of the present invention；

Fig. 2 is the explosive view at another visual angle of differential mechanism according to embodiments of the present invention；

Fig. 3 is the stereogram of differential mechanism according to embodiments of the present invention；

Fig. 4 is the plan view schematic diagram of differential mechanism according to embodiments of the present invention；

Fig. 5 is the stereogram of differential mechanism according to embodiments of the present invention, wherein the second planet carrier and the second gear ring is not shown Deng；

Fig. 6 is the mesh schematic representation of the first planetary gear and the second planetary gear；

Fig. 7 is the theory of engagement schematic diagram of the first planetary gear and the second planetary gear；

Fig. 8 is according to the first gear ring of another embodiment of the invention or the stereogram of the second gear ring；

Fig. 9 is the stereogram of the first gear ring or the second gear ring according to further embodiment of the present invention；

Figure 10 is the schematic diagram of power-driven system according to embodiments of the present invention；

Figure 11 is the schematic diagram of vehicle according to embodiments of the present invention；

Figure 12 is the schematic diagram of power-driven system according to embodiments of the present invention；

Figure 13 is the schematic diagram of differential mechanism, power engagement device and joint portion driving device；

Figure 14-Figure 16 is the arrangement schematic diagram for driving needle on differential mechanism；

Figure 17 is the structure diagram in servo-actuated portion.

Specific embodiment

The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.

Differential mechanism 100 according to embodiments of the present invention is described in detail with reference to Fig. 1-Fig. 7, the differential mechanism 100 It can be used for differential or shaft space difference speed between taking turns, for differential between wheel, which can make driving wheels exist Turn inside diameter is travelled or is rolled when driving with different angular speed in uneven road surface, pure to ensure 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 can include first planet carrier 11, the first row 12 and first gear ring 13 of star-wheel and the second planet carrier 21, the second planetary gear 22 and the second gear ring 23.

With reference to the embodiment of Fig. 1 and Fig. 2,11 and second planet carrier 21 of first planet carrier is 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 Can be split 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, improve machining accuracy.

Such as Fig. 1-Fig. 2 and with reference to shown in Fig. 6, the first planetary gear 12 is arranged in first planet carrier 11, for example, each first For the configuration of planetary gear 12 there are one the first planet wheel spindle 14, two ends of the first planet wheel spindle 14 are rotatably supported in the respectively On one planet carrier 11 and the second planet carrier 21, two ends of such as the first planet wheel spindle 14 can be rotatably supported by bearing In the axis hole to correspond to each other on 11 and second planet carrier 21 of first planet carrier, the first planetary gear 12 is securable to corresponding at this time On first planet wheel spindle 14.Connection 11 and second planet carrier of first planet carrier can be realized by the first planet wheel spindle 14 as a result, 21 purpose, so that 11 and second planet carrier 21 of first planet carrier keeps movement (i.e. 11 He of first planet carrier synchronized, in the same direction Second planet carrier 21 links), and this connection mode is used, 11 and second planet carrier 21 of first planet carrier can be right well First planet wheel spindle 14 is supported, and the first planet wheel spindle 14 is prevented to be disconnected with single planet carrier and lead to differential mechanism 100 Failure.Ginseng is seen figure 1 and figure 2, and the first planetary gear 12 is engaged with the first gear ring 13, concretely internal messing form, i.e., first Planetary gear 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 circumferentially equidistantly distributed is on the inside of the first gear ring 13, for example, as a preferred embodiment, the first planetary gear 12 It can be three, and interval angles are 120 ° between two the first planetary gears 12 of arbitrary neighborhood.

Such as Fig. 1-Fig. 2 and with reference to shown in Fig. 6, the second planetary gear 22 is arranged on the second planet carrier 21, for example, each second There are one the second planet wheel spindles 24 for the configuration of planetary gear 22, and two ends of such as the second planet wheel spindle 24 can be by bearing and rotatable Ground is supported in the axis hole to correspond to each other on 11 and second planet carrier 21 of first planet carrier, and the second planetary gear 22 is securable at this time On corresponding second planet wheel spindle 24.Connection first planet carrier 11 and second can be realized by the second planet wheel spindle 24 as a result, The purpose of planet carrier 21, so that 11 and second planet carrier 21 of first planet carrier keeps movement synchronized, in the same direction, and using this Kind connection mode, 11 and second planet carrier 21 of first planet carrier can well support the second planet wheel spindle 24, prevent Second planet wheel spindle 24 is disconnected with single planet carrier and differential mechanism 100 is caused to fail.

In addition, in other embodiments of the present invention, in order to keep 11 and second planet carrier 21 of first planet carrier can At the same speed, movement in the same direction not only may be used above by the mode of the first planet wheel spindle 14 and/or the second planet wheel spindle 24 reality It is existing, while can also be directly fixedly connected with first planet carrier 11 with the second planet carrier 21 by intermediate connection structure 6, Huo Zhetong Shi Caiyong planet wheel spindles connect 11 and second planet carrier 21 of first planet carrier with intermediate connection structure 6, and about centre connection knot The specific configuration of structure 6 will be discussed in more detail below.

Ginseng is seen figure 1 and figure 2, and the second planetary gear 22 is engaged with the second gear ring 23, concretely internal messing form, i.e., and Two planetary gears 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 more It is a, and circumferentially equidistantly distributed is on the inside of the second gear ring 23, for example, as a preferred embodiment, the second planet Wheel 22 can be three, and interval angles are 120 ° between two the second planetary gears 22 of arbitrary neighborhood.

Wherein, it should be noted that plan view schematic diagrams of the Fig. 4 for the differential mechanism 100 according to 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. 4 is plan view, and at the same time showing above-mentioned Three kinds of meshing relations, therefore the relative position relation of each component is only illustrative, and is not offered as or implies the reality of each component Space layout position.

In the first planetary gear 12 and the second planetary gear 22 are multiple embodiments, 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, Figure 2 with shown in Fig. 5, the first planetary gear 12 and second Planetary gear 22 is three, then first the first planetary gear 12 can be engaged with corresponding first the second planetary gear 22, second First planetary gear 12 can be engaged with corresponding second the second planetary gear 22, and the first planetary gear 12 of third can be with corresponding third A second planetary gear 22 engages, in this way there are multigroup the first planetary gear 12 and the second planetary gear 22 being engaged with each other, in differential mechanism During 100 transmission power, power transmits between the first planetary gear 12 and the second planetary gear 22 of multigroup engagement that corresponds to each other will more Add and stablize, is reliable.

Wherein, with reference to the embodiment of Fig. 4, the revolution axes O of the first planetary gear 12 and the revolution axes O of the second planetary gear 22 It overlaps, and the revolution-radius of the first planetary gear 12 and the second planetary gear 22 (the i.e. central axis distance revolution axes O of planetary gear 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, for the first planetary gear 12, not only engages, while also engaged with the second planetary gear 22 with the first gear ring 13, for It for second planetary gear 22, not only engages with the second gear ring 23, while is also engaged with the first planetary gear 12.

As Figure 1-Figure 4, the first gear ring 13 and the second gear ring 23 may be constructed two power outputs of differential mechanism 100 End, 11 and second planet carrier 21 of the first planet carrier then corresponding power intake for forming differential mechanism 100, such as one in the present invention In a embodiment, first planet carrier 11, the second planet carrier 21 link with input unit 3, in other words, input unit 3, first planet carrier 11 Motion state with the second planet carrier 21 is identical (i.e. synchronized, movement in the same direction).As preferred embodiment, input unit 3, 11 and second planet carrier 21 of first planet carrier is coaxially arranged.External power supply can link with input unit 3 in this way, power source output Power can be inputted from input unit 3, can be respectively from the first gear ring 13 and the second gear ring 23 after the differential action of differential mechanism 100 Output.At this point, as optional embodiment, input unit 3 can connect the power sources such as engine, motor, the first gear ring 13 It can be connected with the second gear ring 23 by gear transmission structure with corresponding semiaxis, semiaxis is connected again with corresponding wheel, but unlimited In this.

Briefly describe the operation principle of differential mechanism 100 for differential between the differential mechanism 100 is applied to wheel below, at this time the One gear ring 13 can be connected by such as gear transmission structure with left half axle, and left half axle 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, right axle shaft can be connected with right side wheels, power source such as engine and/or The power of motor output can be by exporting after the decelerating effect of main reducing gear to input unit 3, and input unit 3 drives first planet carrier 11 With 21 synchronous rotary of the second planet carrier.If vehicle traveling is turned on smooth road surface and not at this time, left side wheel and right side vehicle Theoretically rotating speed is identical for wheel, and differential mechanism 100 does not play differential action at this time, and 11 and second planet carrier 21 of first planet carrier is synchronized, same To rotation, the first gear ring 13 and the second gear ring 23 are synchronized, rotate in same direction, 22 revolution of the first planetary gear 12 and the second planetary gear, Not rotation.If vehicle traveling travels on the road surface of out-of-flatness or turn inside diameter at this time, left side wheel and right side wheels are theoretically Rotating speed is different, and the rotating speed of the first gear ring 13 and the second gear ring 23 is also different, i.e., there are speed discrepancy, the first planetary gear 12 and the at this time Also rotation while revolution of two planetary gears 22, the first planetary gear 12 and the second planetary gear 22 cause the first gear ring 13 from the change of team With in the second gear ring 23 a speedup, another deceleration, the speed discrepancy of the gear ring of the gear ring of speedup with slowing down is left and right vehicle The speed discrepancy of wheel, so as to fulfill differential action.

To sum up, differential mechanism 100 according to embodiments of the present invention utilizes planet differential principle, in structure and type of attachment overhead Between utilization rate higher, axial dimension 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 availability ratio is realized in empty space, greatly facilitates the arrangement of 100 assembly of differential mechanism and big to weight Small limitation, while also have 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.

With reference to Fig. 1-Fig. 2 and Fig. 6-Fig. 7 is combined, the first planetary gear 12 and the second planetary gear 22 are on an axial direction (left side in Fig. 6-Fig. 7 Right direction) on partly overlap, that is to say, that the first planetary gear 12 only overlaps with the second planetary gear 22, part in addition Be staggered, the first planetary gear 12 and the second planetary gear 22 overlapping part can be engaged with each other, and the part being staggered then can with it is respective Gear ring engages.

Specifically, with reference to shown in Fig. 6 and Fig. 7, the first planetary gear 12 can include the first teeth portion 151 and the second teeth portion 152 (using K2 dotted lines in Fig. 7 as line of demarcation), the second planetary gear 22 can include 153 and the 4th teeth portion 154 of third teeth portion (in Fig. 7 K1 dotted lines are line of demarcation), the second teeth portion 152 and third teeth portion 153 form 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 compacter, the volume of differential mechanism 100 is more compact, conducive to differential The installation of device 100, arrangement.

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 The symmetrical bevel differential of system, it is compacter using 100 structure of differential mechanism of roller gear, specifically, its in structure and Space availability ratio higher in type of attachment, axial dimension smaller, and it is 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 with reference to specific embodiment.

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 13 and second gear ring 23 of circle is symmetrical arranged, and can be increased the versatility of gear ring in this way, be reduced cost.

Specifically, as Figure 1-Figure 2, each in the first gear ring 13 and the second gear ring 23 includes：Body panels Portion 161 and the annular side wall portion 162 on periphery edge for being arranged on body panels portion 161, body panels portion 161 and annular side wall portion 162 can be integrally formed component.Multiple gear teeth, body panels portion 161 and ring are provided on the internal face of annular side wall portion 162 Cavity A1, A2 are limited between shape side of sidewall portion 162, i.e., between the body panels portion 161 of the first gear ring 13 and annular side wall portion 162 Cavity A1 is limited, cavity A2 (such as Fig. 4) is limited between the body panels portion 161 of the second gear ring 23 and annular side wall portion 162, The cavity A2 in cavity A1 and the second gear ring 23 in first gear ring 13 toward each other to form installation space A (such as Fig. 4), wherein 11 and first planetary gear 12 of first planet carrier and the second planet carrier 21 and the second planetary gear 22 are accommodated in installation space A, this Sample so that the structure of differential mechanism 100 is relatively more compact, occupies volume smaller, it is easier to arrange, while the first gear ring 13 and the Two gear rings 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 first gear ring 13 and the second gear ring 23 are limited comparatively is closed, and external sundries is not easily accessible installation Moving component is influenced in the A of space, ensure that the steady operation of differential mechanism 100.

The specific configuration of input unit 3 is described in detail in conjunction with specific embodiments below.

According to some embodiments of the present invention, input unit 3 is configured to input end gear.Further, as shown in Figure 1-Figure 3, Input end gear 3 is configured to annular (tooth of the input end gear 3 is formed on peripheral surface) and is set in 13 He of the first gear ring The outer surface of second gear ring 23, it is to be understood that the internal diameter size of input end gear 3 can be more than the first gear ring 13 and second The outer diameter of gear ring 23, the in this way outside by the way that input end gear 3 to be sleeved on to the first gear ring 13 and the second gear ring 23 so that positioned at two The component of a gear ring inner is not exposed from coming, and protects the component of gear ring inner.

With reference to shown in Fig. 4, 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 determine to a certain extent the clearance D size (in addition, The thickness of extension arm 63 can also determine the clearance D, this will be described hereinafter, here first only with the engagement of two planetary gears 22 Partial width determines to illustrate for clearance D), i.e. the width of the engaging portion of the first planetary gear 12 and the second planetary gear 22 can be with It is equal with the minimum value of the clearance D, therefore the width by controlling 22 engaging portion of the first planetary gear 12 and the second planetary gear, it can With the size of the indirect control clearance D, to those skilled in the art, ensureing the first planetary gear 12 and the second planetary gear 22 can be under the premise of stable delivery power and the service life of the first planetary gear 12 and the second planetary gear 22, can be by the first row The relative narrower of the width setting of the engaging portion of 12 and second planetary gear 22 of star-wheel, can effectively reduce the clearance D, make in this way Differential mechanism 100 axial dimension smaller, more compact, be easy to arrange.

Further, input end gear 3 surround and covers the clearance D.As a result, the closure of installation space A is more preferable, outside Portion's sundries is more difficult to enter in installation space A and influence moving component, further ensures the steady operation of differential mechanism 100, together When can also save the axial space and radial space of differential mechanism at least to a certain extent.

In addition, as preferred embodiment, input end gear 3 is main retarder driven gearwheel.Thus, it is possible to preferably Using the main space for subtracting driven gear inner hollow, realize preferably space availability ratio, greatly facilitate 100 assembly of differential mechanism Arrangement and limitation to weight size.

It should be noted that the clearance D of above-mentioned Fig. 4 (with reference to 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. 4, the first tooth 13 and second gear ring 23 of circle all includes body panels portion 161 and annular side wall portion 162.

And in other embodiments of the present invention, such as referring in the embodiment of Fig. 8 and Fig. 9, the first gear ring 13 and second Each in 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 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 more than the internal diameter of annular side wall portion 162, that is, It says, the thickness of the thickness ratio annular side wall portion 162 of annular flange portion 163 is thinner.

However, it is desirable to illustrate, in the gear ring structure of Fig. 1, Fig. 2 and Fig. 4 embodiment, the clearance D 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 embodiments, two gear ring Between clearance D refer to two gear rings annular flange portion 163 between gap.

For the clearance D, the engaging width of two planetary gears mentioned above can determine the big of clearance D to a certain extent Small, at the same time, the thickness of extension arm 63 also determines the size of clearance D to a certain extent.Specifically, in two rows When the engaging width of star-wheel is equal with the thickness for extending arm 63, the size of the clearance D can be with the engaging width of two planetary gears Or the thickness of extension arm 63 is generally equalized.And when the thickness for extending arm 63 is more than the engaging width of two planetary gears, The size of the clearance D can be generally equalized with the thickness of extension arm 63.And the thickness in extension arm 63 is less than two planetary gears Engaging width when, the size of the clearance D can be generally equalized with the engaging width of two planetary gears.

Intermediate connection structure 6 is described in detail with reference to specific embodiment.

As depicted in figs. 1 and 2, the effect of intermediate connection structure 6 is for first planet carrier 11, the second planet carrier 21 to be connected It is connected to input unit 3 so that first planet carrier 11, the second planet carrier 21 being capable of coaxial linkages with input unit 3.In addition, intermediate connection Structure 6 can also be fixedly connected, and the input unit 3 is fixed on centre and connects with first planet carrier 11, the second planet carrier 21 respectively The outer surface of binding structure 6, can equally enable first planet carrier 11, the second planet carrier 21 and 3 coaxial linkage of input unit.

For the specific configuration of intermediate connection structure 6, The present invention gives a kind of feasible embodiment, this is not certainly Represent or imply that the intermediate connection structure 6 of the present invention can only use the structure in the embodiment.That is, it will be situated between in example below The intermediate connection structure 6 to continue is only a kind of feasible embodiment, is not a kind of limitation to the scope of the present invention.

Specifically, ginseng is seen figure 1 and figure 2, and input end gear 3 of the input unit 3 in the embodiment for annular, centre connects Binding structure 6 includes the first connecting bracket 61 and the second connecting bracket 62, and the first connecting bracket 61 is used to connect first planet carrier 11 With input unit 3 (i.e. input end gear 3), the second connecting bracket 62 is for the second planet carrier of connection 21 and 3 (i.e. input terminal of input unit Gear 3), wherein the structure of the first connecting bracket 61 and the second connecting bracket 62 can be identical, and each may each comprise：In Heart body part 64 and extension arm 63 (with reference to Fig. 5), wherein the central body portion of the first connecting bracket 61 and the second connection branch The central body portion of frame 62 can be into a single integrated structure, to form a shared central body portion 64, but not limited to this.

With reference to shown in Fig. 5, on peripheral surface of the extension arm 63 for multiple and centrally disposed body part 64, multiple adjutages Portion 63 and central body portion 64 can be integral structures, but not limited to this.During multiple extension arms 63 are with central body portion 64 It the heart and substantially radially distributes, in the example of hgure 5, extension arm 63 is three and equidistantly distributed.Extension arm 63 is used It is connected in input unit 3, specifically, it is driven that the outer end of extension arm 63 may extend to for example annular main reducing gear of input unit 3 It is fixed at the inner peripheral surface of gear and with inner circumferential surface.

Each group of the first planetary gear 12 being engaged and the second planetary gear 22 be located at two adjacent extension arms 63 it Between, such as in the example of hgure 5, extension arm 63 is three, this three extension arms 63 limit three accommodating chambers (per adjacent The inner peripheral surface of two extensions arms 63 and input end gears 3 limits an accommodating chamber), one can be set in each accommodating chamber To the first planetary gear 12 and the second planetary gear 22 of engagement, so that the overall structure of differential mechanism 100 is compacter, makes simultaneously Differential mechanism 100 center of gravity closer to or positioned at center, substantially improve when differential mechanism 100 runs at high speed due to eccentric or The eccentric larger situations such as cause 100 fluctuation of service of differential mechanism, service life low.

In a further embodiment, as shown in Figure 3 and Figure 4, the first gear ring 13 can coaxially be connected with the first output shaft 41, the second gear ring 23 can coaxially be connected with the second output shaft 42.As shown in Figure 2 and Figure 4, while first planet carrier 11 is coaxial Ground is connected with first planet carrier axis 111, and the second planet carrier 21 is coaxially connected with the second planet carrier shaft 211, the first output shaft 41 It can be hollow shaft and can coaxially be sleeved on first planet carrier axis 111, the second output shaft 42 equally can be hollow shaft and coaxial Ground is set on the second planet carrier shaft 211.Wherein, the central body portion 64 of 111 and first connecting bracket 61 of first planet carrier axis Coaxial fixed, the second planet carrier shaft 211 can be coaxial fixed with the central body portion 64 of the second connecting bracket 62, but not limited to this.

In addition, as optional embodiment, the first gear ring 13 is identical with the radial dimension of the second gear ring 23, and the first tooth Each in 13 and second gear ring 23 of circle may each be integrated molding component.

In addition, for technical solution and/or technical characteristic described in the various embodiments described above, do not conflict with each other, not phase In the case of mutual contradiction, the technical solution in above-described embodiment and/or technical characteristic can be carried out phase by those skilled in the art 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 22 partly overlapping scheme of the second planetary gear and first 11 and second planet carrier 21 of planet carrier is combined for the scheme of platy structure, can effectively reduce the axial ruler of differential mechanism 100 in this way It is very little, so as to make the volume smaller of differential mechanism 100.

For another example, those skilled in the art can be by the first planetary gear 12 and 22 partly overlapping scheme of the second planetary gear and planet Wheel and planet carrier are accommodated in the scheme combination in installation space, can not only effectively reduce the axial ruler of differential mechanism 100 in this way 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, make so as to increase With the service life, maintenance cost is reduced.

For another example, those skilled in the art can be by the revolution axis of the first planetary gear 12 and the revolution axis of the second planetary gear 22 The scheme of the coincidence scheme identical with the revolution-radius of the second planetary gear 22 with the revolution-radius of the first planetary gear 12 combines, in this way So that the structure of differential mechanism 100 is compacter, occupies volume smaller, is more convenient for arranging.

For another example, input unit 3 can be configured to annular input end gear and be sleeved on 13 He of the first gear ring by those skilled in the art The scheme of the peripheral surface of second gear ring 23 is combined with scheme of the input end gear 3 for main retarder driven gearwheel, thus poor Fast device 100 can realize preferably space availability ratio, greatly place preferably using the main space for subtracting driven gear inner hollow The arrangement of differential assembly and the limitation to weight size, and by the way that input unit 3 is directly disposed as annular Main reducing gear driven gear, without individually setting main reducing gear driven gear again, thus can not only reduce entire differential mechanism Parts, reduce cost, but also make the structure of differential mechanism 100 more compact, compact.

For another example, input unit 3 can be configured to annular input end gear with input end gear 3 around simultaneously by those skilled in the art The scheme combination in gap is covered, on the one hand causes the structure relative compact of differential mechanism 100 in this way, and pass through input end gear 3 Cover gap, moreover it is possible to make the installation space that the housing of two planetary gear trains limits relatively more closed, adequately protect installation space Internal component, improves its service life.

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 technique 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 embodiments 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 realize left and right wheels Torque distributes, and the load distribution for making differential mechanism 100 is 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, in addition using roller gear, is gone back The operating noise of differential mechanism 100 is reduced, while reduces calorific value, substantially increases the service life of differential mechanism 100.In short, Differential mechanism 100 according to embodiments of the present invention have lightweight, small size, at low cost, transmission efficiency, low noise, fever it is small, Many advantages, such as service life is high.

Simultaneously as differential mechanism 100 according to embodiments 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 can be set is more, while pitch circle is larger (pitch circle refers to a pair of circle tangent at node during 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 lubrication and the 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 and planetary gear belong to outside 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 parts, reduce the quality and cost of differential mechanism 100, differential mechanism 100 is made to become more miniaturization, lightweight.

Power-driven system 1000 according to embodiments of the present invention is briefly described below, which includes Differential mechanism 100 in above-described embodiment.With reference to shown in Figure 10, power-driven system 1000 includes differential mechanism 100, speed changer 200 With power source 300, the power that power source 300 exports is exported after the chronotropic action by speed changer 200 to differential mechanism 100, then by Differential mechanism 100 distributes to the driving wheel of both sides.Show it is understood that the power-driven system 1000 shown in Figure 10 is only one kind Example, is not a kind of limitation to the scope of the present invention.

Below by taking the power-driven system 1000 shown in Figure 12 as an example, a kind of according to embodiments of the present invention move is described in detail Power-driven system 1000.

As shown in figure 12, differential mechanism 100 can include：Power engagement device 400 and joint portion driving device 500, certainly, Power-driven system 1000 can also include：First dynamotor D1 and the second dynamotor D2.

Power engagement device 400 can include the first joint portion 410 and the second joint portion 420, the first joint portion 410 and the One gear ring 13 is connected with one in the second gear ring 23, and the second joint portion 420 and 11 and second planet carrier 21 of first planet carrier are same Step rotation.First joint portion 410 and the second joint portion 420 can be selectively engaged, due to 11 and second row of first planet carrier Carrier 21 links respectively with input unit 3, and the second joint portion 420 is also correspondingly linked with input unit 3, the first gear ring 13 and the second tooth Circle 23 is the power output end of differential mechanism, and the first joint portion 410 can be with one in the first gear ring 13 and the second gear ring 23 It rotates synchronously.When the first joint portion 410 and the second joint portion 420 engage, the power at input unit 3 can be directly passed to the In one gear ring 13 or the second gear ring 23, so that the first gear ring 13 is identical with the output power of the second gear ring 23.

As shown in figure 12, joint portion driving device 500 includes：Needle 510 and driving portion are driven, driving needle 510 is arranged to can To be rotated with 11 and second planet carrier 21 of first planet carrier, and drive needle 510 can be with respect to 11 and second row of first planet carrier Carrier 21 moves axially, and the both ends of driving needle 510 coordinate respectively with driving portion and the second joint portion 420, and driving portion is arranged to use The second joint portion 420 is driven to be moved in an axial direction to close to the direction at the first joint portion 410 in driving driving needle 510, so as to make the Two joint portions 420 engage the first joint portion 410.It is moved axially that is, driving portion can be used for driving driving needle 510, axis The second joint portion 420 can be promoted to move axially to mobile driving needle 510, so that the second joint portion 420 and the first engagement Portion 410 engages.

First dynamotor D1 is arranged to connect with 13 power coupling of the first gear ring, and the power output after coupling is extremely One in pair of wheels, the second dynamotor D2 is arranged to connect with 23 power coupling of the second gear ring, and after coupling Another in power output to pair of wheels.This can be one group of front-wheel to wheel, or one group of trailing wheel.

As a result, after joint portion driving device 500 drives the second joint portion 420 to be engaged with the first joint portion 410, the first tooth Circle 13 is identical with the output speed of the second gear ring 23, so as to realize the synchronization locking of two semiaxis, can be conducive to be promoted The ability of getting rid of poverty of vehicle.

According to a preferred embodiment of the present invention, the first planet wheel spindle 14 and/or the second planet wheel spindle 24 may be constructed Drive needle 510.That is, the first planet wheel spindle 14 can be used as, driving needle 510 use or the second planet wheel spindle 24 can be with It is used as driving needle 510 or the first planet wheel spindle 14 and the second planet wheel spindle 24 is simultaneously as driving needle 510 to use.

According to a further advantageous embodiment of the invention, as shown in Figure 14-Figure 16,510 and first planet wheel spindle of needle is driven 14 and second planet wheel spindle 24 be spaced apart setting.In other words, driving needle 510 is the component individually arranged, can be reduced in this way pair The change of first planet wheel spindle 14 and the second planet wheel spindle 24 can cause 14 and second planet wheel spindle 24 of the first row spider gear shaft to protect Appropriate length is held, the design and manufacture of differential mechanism can be conducive to.For example, as shown in Figure 14 and Figure 15, driving needle 510 can be set It puts on intermediate connection structure 6.

Another preferred embodiment according to the present invention, the first planet wheel spindle 14, the second planet wheel spindle 24 and driving needle 510 At least one of be connected with the second joint portion 420 so that the second joint portion 420 is with 11 and second planet carrier 21 of first planet carrier It rotates synchronously.That is, the component being connected with the second joint portion 420 can be at least one of above three component, by It is rotated synchronously in above three component with 11 and second planet carrier 21 of first planet carrier, the second joint portion can be promoted in this way 420 can rotate synchronously with 11 and second planet carrier 21 of first planet carrier.

An alternative embodiment according to the present invention, as shown in figure 12, the first joint portion 410 and the first gear ring 13 and second The sleeve 600 of annular can be provided between one in gear ring 23, sleeve 600 surrounds the second joint portion 420.Sleeve as a result, 600 effects that can be connected, it is ensured that the first joint portion 410 and the first gear ring 13 are synchronous with one in the second gear ring 23 to be turned It is dynamic, and sleeve 600 can also play the role of protecting the second joint portion 420 at least to some extent.

Further, as shown in figure 12, power-driven system 1000 can also include：Elastic device 700, elastic device 700 are resiliently arranged between the first joint portion 410 and the second joint portion 420 so that the second joint portion 420 has to far from the The trend of the direction movement at one joint portion 410.When needing to disconnect with the first joint portion 410 at the second joint portion 420, elastic device 700 can be supplied to 420 elastic force of the second joint portion, to promote the second joint portion 420 to the direction far from the first joint portion 410 It is mobile.

Preferably, elastic device 700 can be accommodated in sleeve 600.Elastic device 700 can be arranged on sleeve in this way In 600, sleeve 600 can play the role of protecting elastic device 700, so as to reduce the risk of the failure of elastic device 700.

As shown in figure 12, one in the first gear ring 13 and the second gear ring 23 has integrally formed annular extension, ring Shape extension forms sleeve 600.It can cause simple in structure a, manufacturer in the first gear ring 13 and the second gear ring 23 in this way Just.

Wherein, as shown in Figure 13 and Figure 17, driving portion can include：Servo-actuated portion 520, being servo-actuated portion 520 can be with driving needle 510 rotations, and servo-actuated portion 520 can be braked, and drive surface 530 is provided in servo-actuated portion 520, when servo-actuated portion 520 is braked Change driving needle 510 and the position that is engaged of drive surface 530 by driving slip of the needle 510 in drive surface 530, and then It is axially moveable the driving driving needle 510 of drive surface 530, so that the second joint portion 420 engages the first joint portion 410.It can manage Solution, before servo-actuated portion 520 is not braked, it can be synchronous rotation relationship to be servo-actuated portion 520 and driving needle 510, but After servo-actuated portion 520 is braked, the rotating speed for being servo-actuated portion 520 reduces, and speed discrepancy will occurs between servo-actuated portion 520 and driving needle 510, Driving needle 510 can slide in the drive surface 530 in servo-actuated portion 520 in this way, and the driving needle 510 after sliding can be with respect to first 11 and second planet carrier 21 of planet carrier moves axially, so as to drive needle 510 that the second joint portion 420 can be driven to move closer to first Joint portion 410, until the second joint portion 420 is engaged with the first joint portion 410.

Further, driving portion can also include：Braking parts, braking parts are arranged for braking servo-actuated portion 520.Namely It says, braking parts can play the role of the servo-actuated portion 520 of braking, be engaged when needing the first joint portion 410 and the second joint portion 420 When, braking parts can brake servo-actuated portion 520.

Preferably, braking parts can be arranged to be servo-actuated portion 520 using electromagnetism dynamic braking.Electromagnetic force control is accurate and reliable, So as to improve the functional reliability of drive shaft locking system, the service life of drive shaft locking system can be extended.For example, Driving portion can be electromagnetic brake, be servo-actuated the brake component that portion 520 forms electromagnetic brake, and braking parts form electromagnetic brake Brake bracket.

A specific embodiment according to the present invention, as shown in figure 17, drive surface 530 can be inclined-plane or curved surface.It is logical It crosses and drive surface 530 is arranged to inclined-plane or curved surface, can be conducive to needle 510 be driven to slide in drive surface 530, and can be with Promote that needle 510 is driven to move in the axial direction.

Further, drive surface 530 can include：First segment 530a and second segment 530b, first segment 530a and second segment 530b is connected, and the junction of first segment 530a and second segment 530b is minimum point, and first segment 530a and second segment 530b's is separate The other end of junction is peak.As a result, when one end of needle 510 is driven to be in minimum point, the first joint portion 410 and second Joint portion 420 is in discrete state, when the one end for driving needle 510 is at the highest notch or during neighbouring peak, the first joint portion 410 Engagement state is in the second joint portion 420.In this way by reasonable Arrangement drive surface 530, it can be conducive to drive needle 510 most It is slided between low spot and peak, the engagement at the first joint portion 410 and the second joint portion 420, Ke Yiyou can be conducive in this way Conducive to the functional reliability for promoting drive shaft locking system.

Preferably, each section in first segment 530a and second segment 530b all can be arc-shaped.The first of circular shape Section 530a and second segment 530b can be conducive to drive slip of the one end of needle 510 in drive surface 530, can reduce driving needle 510 moving resistance.

Optionally, each section of corresponding center of circle angle in first segment 530a and second segment 530b is identical.Such first segment 530a and second segment 530b are essentially identical, so as to be more conducive to slip of the driving needle 510 in drive surface 530.

Optionally, drive surface 530 can be multistage, and 530 circumferentially spaced distribution of multistage drive surface.It drives as a result, The quantity of dynamic needle 510 can be corresponding with the quantity of drive surface 530, can increase the quantity of driving needle 510 in this way, so as to So that 510 and second joint portion 420 of multiple driving needles coordinates reliably, the second joint portion 420 can be caused to move axially reliably, it can So that the work of drive shaft locking system is more reliable.

Wherein, can be connected between multistage drive surface 530 by connecting plane, connection plane is concordant with peak.In this way Structural reliability of the servo-actuated portion 520 on the surface of drive surface 530 can be improved at least to some extent, can promote drive shaft lock The structural reliability of locking apparatus.

An alternative embodiment according to the present invention, as shown in figure 17, servo-actuated portion 520 can include：Servo-actuated portion's ontology Servo-actuated portion's flange 520b of 520a and the annular being arranged on servo-actuated portion's ontology 520a are servo-actuated the direction driving needle of portion flange 520b Drive surface 530 is provided on 510 end face.The structure that portion ontology 520a servo-actuated in this way can effectively enhance servo-actuated portion 520 is reliable Property, and drive surface 530 can be set on the end face of servo-actuated portion flange 520b, so as to reduce the design of drive surface 530 Difficulty can improve the structural reliability of drive surface 530.

Further, as shown in figure 17, drive surface limiting slot 530c can be provided in drive surface 530, driving needle 510 One end is located in drive surface limiting slot 530c.As a result, by setting drive surface limiting slot 530c, can to drive needle 510 One end fits can prevent one end of driving needle 510 from driving at least to some extent in this way in drive surface limiting slot 530c It is detached from face 530, mobile reliability and stability of the driving needle 510 in drive surface 530 can be improved.

The operation principle of differential mechanism according to embodiments of the present invention is described below in detail.

When the stranded skidding of vehicle, driver controls electromagnetic brake energization work, and brake bracket braking brake component is made in this way The rotating speed of moving part is suppressed, and drives and speed discrepancy is generated between needle 510 and brake component, driving needle 510 is in the drive surface of brake component It is slided on 530, driving needle 510 can slide into the position of peak or neighbouring peak from the minimum point of drive surface 530, drive Dynamic needle 510 is moved axially to the side at the second joint portion 420, so as to drive needle 510 that can also drive the second joint portion 420 gradually Close to the first joint portion 410, until the first joint portion 410 and the second joint portion 420 engage, at this point, left half axle and right axle shaft are same Step rotation, left wheel Z1 and right wheel Z2 are synchronized, so as to improve the ability of getting rid of poverty of vehicle.

After vehicle is got rid of poverty, driver can press electromagnetic brake, electromagnetic brake power-off again, and elastic device pushes Second joint portion 420 is moved axially to the direction far from the first joint portion 410, and in the process, driving needle 510 is with the second engagement Portion 420 moves axially, and one end that driving needle 510 coordinates with drive surface 530 can be from the position of peak or neighbouring peak Minimum point gradually is slid into, at this point, the second joint portion 420 and the first joint portion 410 are kept completely separate, vehicle can be according to vehicle just Normal straight-line travelling and vehicle normal turn driving mode continue to travel.

It is shown in Figure 11, vehicle 10000 according to embodiments of the present invention is briefly described below, which includes Power-driven system 1000 in above-described embodiment, the power-driven 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.

In the description of this specification, reference term " one embodiment ", " example ", " is specifically shown " some embodiments " The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment of the present invention or example.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 combined in an appropriate manner in one or more embodiments or example.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 impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art within the scope of the invention can be to above-mentioned Embodiment is changed, changes, replacing and modification.

Claims (24)

1. a kind of differential mechanism for vehicle, which is characterized in that including：

First planet carrier, the first planetary gear and the first gear ring, first planetary gear are connected with the first planet carrier, and described One planetary gear is engaged with first gear ring；

Second planet carrier, the second planetary gear and the second gear ring, second planetary gear are connected with second planet carrier, and described Two planetary gears are engaged with second gear ring and second planetary gear is also engaged with first planetary gear, wherein, described One gear ring and second gear ring form two power output ends；

Input unit, the input unit, the first planet carrier and second planet carrier is coaxially arranged and input unit difference It links with the first planet carrier and second planet carrier；

Power engagement device, the power engagement device include the first joint portion and the second joint portion, first joint portion with One in first gear ring and the second gear ring is connected, second joint portion and the first planet carrier and second row Carrier rotates synchronously；

Joint portion driving device, the joint portion driving device include：Drive needle and driving portion, the driving needle is arranged to can be with The first planet carrier and second planet carrier are around center axis thereof and can opposite first planet carrier and second planet Frame moves axially, and the both ends of the driving needle coordinate respectively with the driving portion and second joint portion, and the driving portion is set It is set to that the driving needle is driven to drive second joint portion along the axial direction to close to the direction at first joint portion It is mobile, so as to which second joint portion be made to engage first joint portion.

2. the differential mechanism according to claim 1 for vehicle, which is characterized in that further include：Power source, the power source It links with the input unit.

3. the differential mechanism according to claim 1 for vehicle, which is characterized in that each first planetary gear is configured with One the first planet wheel spindle, two ends of first planet wheel spindle respectively with the first planet carrier and second planet Frame is connected, and there are one the second planet wheel spindle, two ends parts of second planet wheel spindle for each second planetary gear configuration It is not connected with the first planet carrier and second planet carrier.

4. the differential mechanism according to claim 3 for vehicle, which is characterized in that first planet wheel spindle and/or institute It states the second planet wheel spindle and forms the driving needle.

5. the differential mechanism according to claim 3 for vehicle, which is characterized in that the driving needle and first planet Wheel shaft and second planet wheel spindle are spaced apart setting.

6. the differential mechanism according to claim 3 for vehicle, which is characterized in that first planet wheel spindle, described At least one of two planet wheel spindles and the driving needle are connected with second joint portion, so that second joint portion is with institute It states first planet carrier and second planet carrier rotates synchronously.

7. the differential mechanism according to claim 1 for vehicle, which is characterized in that first joint portion and described first The sleeve of annular is provided between one in gear ring and second gear ring, the sleeve surrounds second engagement Portion.

8. the differential mechanism according to claim 7 for vehicle, which is characterized in that further include：Elastic device, the elasticity Device is resiliently arranged between first joint portion and second joint portion so that second joint portion has to remote The trend of direction movement from first joint portion.

9. the differential mechanism according to claim 8 for vehicle, which is characterized in that the elastic device is accommodated in the set In cylinder.

10. the differential mechanism according to claim 7 for vehicle, which is characterized in that first gear ring and described second It is one with integrally formed annular extension, the annular extension composition sleeve in gear ring.

11. the differential mechanism according to claim 1 for vehicle, which is characterized in that first planetary gear and described the Two planetary gears partly overlap in the axial direction.

12. the differential mechanism according to claim 11 for vehicle, which is characterized in that first planetary gear includes：The One teeth portion and the second teeth portion, second planetary gear include：Third teeth portion and the 4th teeth portion, first teeth portion and described first Gear ring engages, second teeth portion corresponding overlapping and engagement cooperation, the 4th tooth in the axial direction with the third teeth portion It is engaged with second gear ring in portion.

13. the differential mechanism according to claim 1 for vehicle, which is characterized in that the input unit is configured to input terminal Gear, the input end gear are configured to annular and are set in first gear ring and the second gear ring outer surface, and described Gap is provided between one gear ring and second gear ring, the input end gear surround and covers the gap.

14. the differential mechanism according to claim 1 for vehicle, which is characterized in that the revolution of first planetary gear half Diameter is identical with the revolution-radius of second planetary gear.

15. the differential mechanism according to claim 1 for vehicle, which is characterized in that the hollow shaft of first planetary gear Line is overlapped with the revolution axis of second planetary gear.

16. the differential mechanism according to claim 1 for vehicle, which is characterized in that the driving portion includes：

Servo-actuated portion, the servo-actuated portion can be with the driving needle rotation, and the servo-actuated portion can be braked, and be set in the servo-actuated portion Drive surface is equipped with, slip of the needle in the drive surface is driven to make the drive surface by described when the servo-actuated portion is braked The driving needle is driven along the axial movement, so that second joint portion engages the first joint portion engagement.

17. the differential mechanism according to claim 16 for vehicle, which is characterized in that the driving portion further includes：

Braking parts, the braking parts are arranged for braking the servo-actuated portion.

18. the differential mechanism according to claim 17 for vehicle, which is characterized in that the braking parts are arranged to utilize electricity Portion is servo-actuated described in magnetic braking.

19. the differential mechanism according to claim 18 for vehicle, which is characterized in that the driving portion is electromagnetic braking Device, the servo-actuated portion form the brake component of the electromagnetic brake, and the braking parts form the brake bracket of the electromagnetic brake.

20. the differential mechanism according to claim 16 for vehicle, which is characterized in that the drive surface is inclined-plane or song Face.

21. the differential mechanism according to claim 16 for vehicle, which is characterized in that the drive surface includes：First segment And second segment, the first segment are connected with the second segment, the junction of the first segment and the second segment is minimum point, institute The other end far from the junction for stating first segment and the second segment is peak.

22. the differential mechanism according to claim 21 for vehicle, which is characterized in that the servo-actuated portion includes：Servo-actuated portion Servo-actuated portion's flange of ontology and the annular being arranged on servo-actuated portion's ontology, the direction driving needle of servo-actuated portion's flange End face on be provided with the drive surface.

23. the differential mechanism according to claim 22 for vehicle, which is characterized in that be provided with driving in the drive surface Face limiting slot, one end of the driving needle are located in the drive surface limiting slot.

24. a kind of vehicle, which is characterized in that including the differential for vehicle according to any one of claim 1-23 Device.