CN209552946U - A kind of central drive system and a kind of electric car - Google Patents

Abstract

The utility model discloses a kind of central drive systems and a kind of electric car.In the central drive system: motor is located at outside axle housing；Differential mechanism is located in axle housing；One end of input shaft is located at outside axle housing, and is connected with the output end of motor, and the other end of input shaft is located in axle housing, and is provided with the first angular wheel；First angular wheel and the second angular wheel of the ring structure in differential mechanism are arranged vertically and are sequentially connected, and slow down for the first order；First output shaft and the second output shaft are located at the two sides of differential mechanism and are sequentially connected with it；The outer end of first output shaft is located at outside axle housing, and is sequentially connected with first wheel by first planetary gear deceleration system, slows down for the second level；The outer end of second output shaft is located at outside axle housing, and is sequentially connected with the second wheel hub by first planetary gear deceleration system, slows down for the second level.It can be seen that the utility model can be realized wheel hub driving and double reduction.

Description

A kind of central drive system and a kind of electric car

Technical field

The utility model relates to electric vehicle engineering field, in particular to a kind of central drive system and a kind of electronic vapour Vehicle.

Background technique

In the prior art, the drive system of pure electric automobile are as follows: motor is connected with transmission shaft, and transmission shaft and drive axle input Axis connection, drive axle input axis connection Drive axle housing inside have main reducing gear, main reducing gear is for realizing deceleration, then again Power is transferred to two wheel hubs in left and right by differential mechanism, wheel hub is connected with wheel, and then realizes the operating of wheel.As it can be seen that should There was only primary speed-down in drive system, speed ratio is small, and the Motor torque of demand is very big, larger so as to cause motor total quality.

Moreover, because at present new-energy automobile battery, motor, in terms of the problem of, it is desirable that vehicle is whole A aspect of performance can be promoted, but again since the development of pure electric automobile is more slow, at present it is not possible that directly transition is Side or wheel hub driving are taken turns, in this case, needs to carry out some improvement on the basis of current existing power transmitting, is suitble to new energy Source vehicle drives transition to wheel hub.

Therefore, how to be improved on the basis of current existing power transmitting, to realize that wheel hub driving and multistage subtract Speed is current those skilled in the art technical problem urgently to be resolved.

Utility model content

In view of this, the purpose of this utility model is to provide a kind of central drive system and a kind of electric car, it can Realize wheel hub driving and double reduction.

To achieve the above object, the utility model provides the following technical solutions:

A kind of central drive system, including motor, differential mechanism, drive axle, first wheel, the second wheel hub, the drive axle Including input shaft, axle housing, the first output shaft and the second output shaft, in which:

The motor is located at outside the axle housing；

The differential mechanism is located in the axle housing；

One end of the input shaft is located at outside the axle housing, and is connected with the output end of the motor, the input shaft The other end is located in the axle housing, and is provided with the first angular wheel, the ring in first angular wheel and the differential mechanism Second angular wheel of shape structure is arranged vertically and is sequentially connected, and slows down for the first order；

First output shaft and second output shaft are located at the two sides of the differential mechanism and are sequentially connected with it；

The outer end of first output shaft is located at outside the axle housing, and passes through the first planet tooth between the first wheel Deceleration system transmission connection is taken turns, is slowed down for the second level；

The outer end of second output shaft is located at outside the axle housing, and passes through the second planet tooth between second wheel hub Deceleration system transmission connection is taken turns, is slowed down for the second level.

Preferably, in above-mentioned central drive system, the first planetary gear deceleration system includes the first shell, first Sun gear, first planetary gear, the first gear ring, in which:

First shell and the first wheel are connected；

The inner end of first output shaft is connect with the differential mechanism, after outer end passes through the central through hole of the first wheel It protrudes into first shell and is connect with first sun gear；

The first planetary gear is provided with multiple, and engages respectively with first sun gear, the first planet tooth The first planetary gear axis of wheel is connected with first shell；

The outboard end of first gear ring is provided with the internal tooth engaged with the first planetary gear, first gear ring Inner end and axle tube are connected.

Preferably, in above-mentioned central drive system, between the inner end of first gear ring and first output shaft It is provided with sliding bearing or the fit-up gap greater than zero；

And/or between the inner end and the first wheel of first gear ring it is provided with rolling bearing or greater than zero Fit-up gap.

Preferably, in above-mentioned central drive system, it is provided with the first location notch hole in first shell, described first The shaft end of output shaft is provided with the first positioning protrusion with first location notch hole rotation connection and axial limiting.

Preferably, in above-mentioned central drive system, connecting flange, first shell are provided on first shell It is connected by the connecting flange and the first wheel.

Preferably, in above-mentioned central drive system, second planetary gear reduction system and the first planet tooth Take turns deceleration system symmetrical configuration.

A kind of electric car is provided with central drive system as described above.

It can be seen from the above technical proposal that being saved in central drive system provided by the utility model and electric car Transmission shaft in the prior art enables the input shaft of motor and drive axle directly be connected, so that the transmitting of power is directly carried out, from And is conducive to shorten powerdriven distance, mitigates complete vehicle quality, increase interior space.Moreover, in provided by the utility model It entreats in drive system, the first order is realized by the first angular wheel and the second angular wheel and is slowed down, meanwhile, further through the first row Star gear reduction system and the second planetary gear reduction system realize second level deceleration, to be conducive to increase whole system Transmission ratio, in this case can reduce torque, the size and weight of motor, to be conducive to mitigate complete vehicle quality, increase vehicle Interior space.In addition, the drive axle versatility with higher in central drive system provided by the utility model, is suitble to new energy The transition stage of product.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the structural schematic diagram of drive system in the prior art；

Fig. 2 is the structural schematic diagram of central drive system provided by the embodiment of the utility model；

Fig. 3 is the sectional side view of planetary gear reduction system provided by the embodiment of the utility model；

Fig. 4 is the schematic diagram of internal structure of planetary gear reduction system provided by the embodiment of the utility model.

Wherein:

1- motor, 2- input shaft, the second wheel hub of 3-, 4- first bevel gear, 5- second bevel gear,

6- differential mechanism, 7- axle housing, the first output shaft of 8-, the second output shaft of 9-, 10- rolling bearing,

The first gear ring of 11-, 12- first planetary gear axis, 13 first-shells, 14- first wheel,

The first location notch hole of 15-, the first positioning protrusion of 16-,

61- the first taper sun gear, 62- the second taper sun gear.

Specific embodiment

The utility model discloses a kind of central drive systems and a kind of electric car, can be realized wheel hub driving and second level Slow down.

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Please see Fig. 2 to Fig. 4, Fig. 2 is the structural schematic diagram of central drive system provided by the embodiment of the utility model, figure 3 be the sectional side view of planetary gear reduction system provided by the embodiment of the utility model, and Fig. 4 is provided by the embodiment of the utility model The schematic diagram of internal structure of planetary gear reduction system.

Central drive system provided by the embodiment of the utility model includes motor 1, differential mechanism 6, drive axle, first wheel 14, the second wheel hub 3, drive axle include input shaft 2, axle housing 7, the first output shaft 8 and the second output shaft 9.Wherein:

Motor 1 is located at outside axle housing 7；

Differential mechanism 6 is located in axle housing 7；

One end of input shaft 2 is located at outside axle housing 7, and is connected with the output end of motor 1, and the other end of input shaft 2 is located at bridge In shell 7, and it is provided with the first angular wheel 4, the second angular wheel 5 of the first angular wheel 4 and the ring structure in differential mechanism 6 It is arranged vertically and is sequentially connected, the diameter of the second angular wheel 5 is greater than the diameter of the first angular wheel 4, to realize the first order Slow down；

First output shaft 8 and the second output shaft 9 are located at the two sides of differential mechanism 6 and are sequentially connected with it；

The outer end of first output shaft 8 is located at outside axle housing 7, and passes through first planetary gear reduction train between first wheel 14 System transmission connection, to realize that the second level is slowed down；

The outer end of second output shaft 9 is located at outside axle housing 7, and passes through the second planetary gear speed-reduction system between the second wheel hub 3 System transmission connection, to realize that the second level is slowed down.

As it can be seen that eliminating transmission shaft in the prior art in central drive system provided by the embodiment of the utility model, enable The input shaft 2 of motor 1 and drive axle is directly connected, so that power transmitting is directly carried out, to be conducive to shorten powerdriven Distance mitigates complete vehicle quality, increases interior space.

Moreover, passing through the first angular wheel 4 and the second taper in central drive system provided by the embodiment of the utility model Gear 5 realizes first order deceleration, meanwhile, further through first planetary gear deceleration system and the second planetary gear reduction system point Second level deceleration is not realized, to be conducive to increase the transmission ratio of whole system, in this case can reduce the torsion of motor Square, size and weight, to be conducive to mitigate complete vehicle quality, increase interior space.

In addition, the drive axle versatility with higher in central drive system provided by the embodiment of the utility model, is fitted Close the transition stage of new energy product.

Specifically, Fig. 2 is referred to Fig. 4.First planetary gear deceleration system include the first shell 13, the first sun gear, First planetary gear, the first gear ring 11.Wherein:

First shell 13 is connected with first wheel 14；

The inner end of first output shaft 8 and the 61 (sun i.e. in differential mechanism 6 of the first taper sun gear in differential mechanism 6 Wheel, structure are bevel gear) connection, the outer end of the first output shaft 8 is protruded into outside first after the central through hole of first wheel 14 It is connect in shell 13 and with the first sun gear in first planetary gear deceleration system；

The first planetary gear engaged with the first sun gear is provided with multiple (preferably two, three or four), each The first planetary gear axis 12 of first planetary gear is connected with the first shell 13, to drive the rotation of the first shell 13；

The outboard end (i.e. far from one end of vehicle center) of first gear ring 11 is internally provided with and engages with first planetary gear Internal tooth, the inner end (i.e. close to one end of vehicle center) of the first gear ring 11 and axle tube are connected.

Specifically, be provided with connecting flange on the first shell 13, the first shell 13 and first wheel 14 pass through between connect Flange is connected.

Specifically, sliding bearing or the dress greater than zero are provided between the inner end of the first gear ring 11 and the first output shaft 8 With gap, when guaranteeing the rotation of the first output shaft 8, the first gear ring 11 is fixed；The inner end of first gear ring 11 and the first round Rolling bearing 10 or the fit-up gap greater than zero are provided between hub 14, to guarantee that first wheel 14 is rotatably sleeved on first Outside the inner end of gear ring 11, i.e., when first wheel 14 rotates, the first gear ring 11 is fixed.To as it can be seen that first gear ring 11 It is connected after passing through to inner end ecto-entad the central through hole of first wheel 14 with axle tube, and can guarantee first wheel 14 and first output shaft 8 it is coaxial and can relatively rotate.

But be not limited to that this, optinal plan that there are many connection structures between the first shell 13 and first wheel 14, Such as the two by connector by being connected again after clamping protrusion or bond structure progress circumferential direction clamping；First output shaft 8, the first round Arrangement connection type between hub 14 and the first gear ring 11 can also there are many optinal plans, such as first wheel 14 is set to The outside (i.e. the left side of the first shell 13 in Fig. 3) of first gear ring 11.Those skilled in the art can have according to actual needs Body is implemented, and the utility model is not especially limited this.

Further, in above-mentioned central drive system, it is additionally provided with the first location notch hole 15 in the first shell 13, first The shaft end of output shaft 8 is provided with the first positioning protrusion 16 with first location notch hole 15 rotation connection and axial limiting.To, By the first location notch hole 15 and the first positioning protrusion 16, not only facilitates and guarantee the same of the first output shaft 8 and the first shell 13 Axis, and facilitate the axial float for preventing the first output shaft 8 from occurring during the motion.

Specifically, Fig. 2 to Fig. 4 is referred to, in above-mentioned central drive system, the second planetary gear reduction system and first Planetary gear reduction system symmetrical configuration.To, in the second planetary gear reduction system include second housing, the second sun gear, Second planetary gear, the second gear ring.Wherein:

Second housing and the second wheel hub 3 are connected；

In the inner end of second output shaft 9 and differential mechanism 6 the second taper sun gear 62 (i.e. in differential mechanism 6 another too Sun wheel, structure are bevel gear) connection, the outer end of the second output shaft 9 is protruded into outside second after the central through hole of the second wheel hub 3 It is connect in shell and with the second sun gear in the second planetary gear reduction system；

The second planetary gear engaged with the second sun gear is provided with multiple (preferably two, three or four), each Second the second planetary gear shaft of planetary gear is connected with second housing, so that second housing be driven to rotate；

The outboard end (i.e. far from one end of vehicle center) of second gear ring is internally provided with to be engaged with the second planetary gear Internal tooth, the inner end (i.e. close to one end of vehicle center) of the second gear ring and axle tube are connected.

Specifically, be provided with connecting flange on second housing, second housing and the second wheel hub 3 pass through between connecting flange it is solid Even.

Specifically, sliding bearing or the assembly greater than zero are provided between the inner end of the second gear ring and the second output shaft 9 Gap, when guaranteeing the rotation of the second output shaft 9, the second gear ring is fixed；Between the inner end of second gear ring and the second wheel hub 3 It is provided with rolling bearing 10 or the fit-up gap greater than zero, to guarantee that the second wheel hub 3 is rotatably sleeved in the second gear ring Outside side, i.e. when the second wheel hub 3 rotates, the second gear ring is fixed.To as it can be seen that the inner end ecto-entad of the second gear ring It is connected after the central through hole of the second wheel hub 3 with axle tube, and can guarantee that the second wheel hub 3 and the second output shaft 9 are same It axis and can relatively rotate.

But be not limited to that this, there are many optinal plans for the connection structure between second housing and the second wheel hub 3, such as The two is connected by connector again after carrying out circumferential clamping by clamping protrusion or bond structure；Second output shaft 9, the second wheel hub 3 And the second arrangement connection type between gear ring can also there are many optinal plans, such as the second wheel hub 3 is set to the second tooth The outside of circle.Those skilled in the art can be embodied according to actual needs, and the utility model is not especially limited this.

Further, the second location notch hole, the second output are additionally provided in above-mentioned central drive system, in second housing The shaft end of axis 9 is provided with the second positioning protrusion with second location notch hole rotation connection and axial limiting.To pass through second Location notch hole and the second positioning protrusion not only facilitate the alignment for guaranteeing the second output shaft 9 and second housing, and facilitate The axial float for preventing the second output shaft 9 from occurring during the motion.

To sum up, when central drive system provided by the embodiment of the utility model works:

Motor 1 is rotated with driven input shaft 2, passes through the on the first angular wheel 4 and the second output shaft 9 on input shaft 2 Two angular wheels 5 realize that the first order is slowed down；Meanwhile power is transferred to differential mechanism 6 by the second angular wheel 5；Pass through difference again Power is transferred to the first output shaft 8 and the second output shaft 9 by fast device 6；The outer end of first output shaft 8 and first planetary gear are slowed down The first sun gear engagement in system, the outer end of the second output shaft 9 and the second sun gear in the second planetary gear reduction system Engagement, to carry out power transmitting, due to the first gear ring 11 and the second planetary gear speed-reduction in first planetary gear deceleration system The second gear ring in system is fixed, so, first planetary gear drives first by first planetary gear axis 12 Shell 13 rotates, meanwhile, the second planetary gear drives second housing rotation by the second planetary gear shaft, realizes the second level respectively Slow down；Be connected again due to the first shell 13 with first wheel 14, second housing is connected with the second wheel hub 3, so that power be transmitted To first wheel 14 and the second wheel hub 3, it is finally reached the purpose of two wheel movements in driving left and right.

In addition, the utility model embodiment additionally provides a kind of electric car, due to being provided in the electric car as above Central drive system in text reduces torque, the size and weight of motor, so as to realize double reduction to mitigate vehicle Quality increases interior space.

Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged Except there is also other identical elements in the process, method, article or apparatus that includes the element.

Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other The difference of embodiment, the same or similar parts in each embodiment may refer to each other.

The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein The widest scope consistent with features of novelty.

Claims (7)

1. a kind of central drive system, which is characterized in that including motor (1), differential mechanism (6), drive axle, first wheel (14), Second wheel hub (3), the drive axle include input shaft (2), axle housing (7), the first output shaft (8) and the second output shaft (9), In:

The motor (1) is located at the axle housing (7) outside；

The differential mechanism (6) is located in the axle housing (7)；

One end of the input shaft (2) is located at the axle housing (7) outside, and is connected with the output end of the motor (1), the input The other end of axis (2) is located in the axle housing (7), and is provided with the first angular wheel (4), first angular wheel (4) with The second angular wheel (5) of ring structure in the differential mechanism (6) is arranged vertically and is sequentially connected, and slows down for the first order；

First output shaft (8) and second output shaft (9) are located at the two sides of the differential mechanism (6) and are driven with it Connection；

The outer end of first output shaft (8) is located at the axle housing (7) outside, and passes through first between the first wheel (14) Planetary gear reduction system transmission connection, slows down for the second level；

The outer end of second output shaft (9) is located at the axle housing (7) outside, and passes through second between second wheel hub (3) Planetary gear reduction system transmission connection, slows down for the second level.

2. central drive system according to claim 1, which is characterized in that the first planetary gear deceleration system includes First shell (13), the first sun gear, first planetary gear, the first gear ring (11), in which:

First shell (13) and the first wheel (14) are connected；

The inner end of first output shaft (8) is connect with the differential mechanism (6), and the outer end of first output shaft (8) passes through institute It protrudes into first shell (13) after stating the central through hole of first wheel (14) and is connect with first sun gear；

The first planetary gear is provided with multiple, and engages respectively with first sun gear, the first planetary gear First planetary gear axis (12) is connected with first shell (13)；

First gear ring (11) is internally provided with the internal tooth engaged with the first planetary gear, first gear ring (11) Inner end and axle tube be connected.

3. central drive system according to claim 2, which is characterized in that the inner end of first gear ring (11) and institute It states and is provided with sliding bearing or the fit-up gap greater than zero between the first output shaft (8)；

And/or be provided between the inner end and the first wheel (14) of first gear ring (11) rolling bearing (10) or Fit-up gap greater than zero.

4. central drive system according to claim 2, which is characterized in that be provided with first in first shell (13) Location notch hole (15), the shaft end of first output shaft (8) are provided with and first location notch hole (15) rotation connection and axis To the first positioning protrusion (16) of limit.

5. central drive system according to claim 2, which is characterized in that be provided with connection on first shell (13) Flange, first shell (13) are connected by the connecting flange and the first wheel (14).

6. central drive system according to any one of claims 1 to 5, which is characterized in that second planetary gear reduction Speed system and the first planetary gear deceleration system symmetrical configuration.

7. a kind of electric car, which is characterized in that be arranged just like central drive system as claimed in any one of claims 1 to 6.