CN218558573U

CN218558573U - Electric automobile transmission structure and transmission system

Info

Publication number: CN218558573U
Application number: CN202223026460.0U
Authority: CN
Inventors: 施郁峰; 王爱平; 朱雷; 赵晖
Original assignee: Changzhou Imas Power Technology Co ltd
Current assignee: Changzhou Imas Power Technology Co ltd
Priority date: 2022-11-14
Filing date: 2022-11-14
Publication date: 2023-03-03
Anticipated expiration: 2032-11-14

Abstract

The application discloses electric automobile transmission structure and transmission system. The transmission structure of the electric automobile is suitable for unidirectionally transmitting the torque of the motor to an external driven piece. The transmission structure of the electric automobile comprises a speed changing component and a one-way transmission component. The speed change component comprises an input part and an output shaft, the input part is in transmission connection with the motor, and the output shaft is in transmission connection with the external driven part. The one-way transmission member is arranged to connect the input member and the output shaft in a one-way transmission manner, so that the torque of the input member can be transmitted to the output shaft only in one direction. Wherein the one-way transmission component makes the moment of torsion can only be transmitted to the output shaft from the input member to avoided the output shaft to drive the pivoted problem of motor, avoided the motor to be dragged the problem of turning round.

Description

Electric automobile transmission structure and transmission system

Technical Field

The utility model relates to an automobile transmission structure specifically is electric automobile transmission structure and transmission system.

Background

The electric automobile is driven by the motor to run by taking a vehicle-mounted power supply as power, and the influence on the environment is smaller than that of the traditional automobile because the waste gas is not generated like the traditional automobile, so that the application prospect of the electric automobile is widely seen.

At present, a motor of an electric automobile is driven by the motor, and a set of power assembly is adopted by a common electric automobile to realize front wheel driving or rear wheel driving of the electric automobile, but the driving mode is insufficient in driving conditions of acceleration, climbing and getting rid of difficulties. Therefore, in order to pursue power performance, many high-performance electric automobiles are provided with a set of power system at each of front and rear wheels of the automobile to realize four-wheel drive, but the adoption of the four-wheel drive of the automobile often causes the motor to be reversely dragged by the wheels of the automobile. When the motor is reversely dragged, the rotor inside the motor rotates to generate electricity, so that reverse potential energy is generated inside the circuit, the reverse potential energy consumes power supply energy, and the service life of the system is shortened. Therefore, the four-wheel drive of the existing electric automobile can cause large energy loss of a power supply, and the cruising ability of the electric automobile is reduced.

SUMMERY OF THE UTILITY MODEL

An advantage of the utility model is that an electric automobile transmission structure and transmission system are provided, wherein one-way transmission component makes the moment of torsion can only transmit to the output shaft from the input to avoided the output shaft to drive motor pivoted problem, avoided the motor by the problem of anti-dragging.

For reaching the utility model discloses above at least one advantage, the utility model provides an electric automobile transmission structure is suitable for the one-way transmission of moment of torsion with the motor to external follower, electric automobile transmission structure includes:

the speed change component comprises an input part and an output shaft, the input part is in transmission connection with the motor, and the output shaft is in transmission connection with the external driven part; and

and the one-way transmission component is arranged to connect the input member and the output shaft in a one-way transmission manner, so that the torque of the input member can be transmitted to the output shaft only in one direction.

According to an embodiment of the invention, the input is implemented as a sun gear;

the variable speed component still includes two at least planet subassemblies and a planet carrier, the planet subassembly includes a first planet wheel and a second planet wheel of coaxial coupling, wherein first planet wheel with the second planet wheel all rotationally set up in the planet carrier, first planet wheel with the sun gear meshing, the planet carrier with the help of the second planet wheel with the unidirectional flux transmission component transmission is connected, the planet carrier with output shaft transmission is connected, the unidirectional flux transmission component can unidirectional rotation, so that planet carrier unidirectional flux transmission.

According to an embodiment of the invention, the planet assemblies are implemented as three.

According to an embodiment of the invention, the one-way transmission member is implemented as a one-way clutch, the one-way clutch is held in the outside of the planet carrier, and with the second planet wheel transmission is connected.

According to the utility model discloses an embodiment, the variable speed component still includes a ring gear, the ring gear set up in one way clutch, one way clutch passes through the ring gear with the second planet wheel inner gearing.

In order to achieve the utility model discloses above at least one advantage, the utility model provides an electric automobile drive transmission system, electric automobile drive transmission system includes:

a motor;

a differential mechanism; and

according to the electric vehicle transmission structure of the above embodiment, the electric vehicle transmission structure is configured to connect the motor and the differential in a one-way transmission manner.

According to the utility model discloses an embodiment, electric automobile transmission structure be concentrated set up in the motor.

According to the utility model discloses an embodiment, the motor includes a casing, a stator and a rotor, the casing forms one and holds chamber and an installation cavity, the stator set up in the casing, the rotor rotationally set up in the casing, the stator with the rotor all is located in the installation cavity, the sun gear set up in the rotor, the planet subassembly the planet carrier with the unidirectional transmission component all is located hold the chamber.

According to the utility model discloses an embodiment, the motor still includes an axis of rotation, the axis of rotation with the differential transmission is connected, the axis of rotation runs through the rotor, and extend to the casing is outside.

According to the utility model discloses an embodiment, differential mechanism is located hold the chamber.

Drawings

Fig. 1 shows a schematic structural diagram of the driving transmission system of the electric vehicle of the present invention.

Fig. 2 shows a schematic diagram of a partial structure of the transmission structure of the electric vehicle of the present invention.

Fig. 3 shows a perspective view of one side of the transmission structure of the electric vehicle of the present invention.

Fig. 4 shows a perspective view of the other side of the transmission structure of the electric vehicle of the present invention.

Fig. 5 shows a partial cross-sectional view of the transmission structure of the electric vehicle of the present invention.

Fig. 6 is a partially enlarged view of a portion a in fig. 5.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purpose of limitation.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Referring to fig. 1 to 6, a transmission structure of an electric vehicle according to a preferred embodiment of the present invention will be described in detail below. The transmission structure of the electric automobile is suitable for unidirectionally transmitting the torque of a driving unit to an external driven member. The transmission structure of the electric vehicle includes a speed change member 10 and a one-way transmission member 20.

The transmission component 10 comprises an input 11 and an output shaft 12, wherein the input 11 is in driving connection with the drive unit, which may be embodied as a motor, and wherein the output shaft 12 is in driving connection with the external driven member, which may be embodied as a wheel.

The one-way transmission member 20 is configured to connect the input member 11 and the output shaft 12 in a one-way transmission manner, so that the torque of the input member 11 can be transmitted to the output shaft 12 in one way, that is, the input member 11 can drive the output shaft 12 to rotate, so that the output shaft 12 drives the external driven member to rotate. When the external driven member serves as a driving member to drive the output shaft 12 to rotate, the torque of the output shaft 12 cannot be transmitted to the input member 11 due to the function of the one-way transmission member 20.

Specifically, when the electric vehicle transmission structure is applied to an electric vehicle, the motor inputs a torque to the input member 11 and drives the output shaft 12 and the external driven member to rotate, so that the wheel can normally rotate, and when the external driven member is used as a driving member to drive the output shaft 12 to rotate, the torque of the output shaft 12 is not transmitted to the input member 11, so that the electric vehicle transmission structure can prevent the motor from being driven by the wheel of the vehicle to rotate, and can effectively prevent the situation of reverse dragging, thereby preventing the energy loss of a vehicle power supply from being large. The anti-dragging condition refers to the wheel rotating the output shaft 12.

The input element 11 is embodied as a sun gear, which is mounted on the drive shaft of the electric motor.

The transmission member 10 further comprises at least two sets of planetary assemblies 14 and a planet carrier 15, wherein the planetary assembly 14 comprises a first planetary gear 141 and a second planetary gear 142 which are coaxially connected, wherein the first planetary gear 141 and the second planetary gear 142 are both arranged on the planet carrier 15. The planet carrier 15 is in transmission connection with the sun gear by means of the first planet gear 141, the first planet gear 141 is meshed with the sun gear, the planet carrier 15 is in transmission connection with the unidirectional transmission component 20 by means of the second planet gear 142, and the planet carrier 15 is in transmission connection with the output shaft 12. The one-way transmission member 20 meshes at least two of the second planetary gears 142 in one-way rotation.

As shown in fig. 1 and fig. 2, it is described that the rotational direction of the unidirectional transmission member 20 is clockwise rotation, that is, the unidirectional transmission member 20 cannot rotate counterclockwise, and the motor drives the sun gear to rotate clockwise, where the first planet gear 141 is externally engaged with the sun gear, the first planet gear 141 is driven to rotate counterclockwise, the first planet gear and the second planet gear 142 are coaxial, the second planet gear 142 also rotates counterclockwise, the second planet gear 142 is internally engaged with the unidirectional transmission member 20, and the unidirectional transmission member 20 cannot rotate counterclockwise, so that the second planet gear 142 drives the planet carrier 15 to rotate clockwise, and the planet carrier 15 can drive the output shaft 12 to rotate clockwise, thereby normally outputting torque to the outside to drive the wheels of the automobile to rotate clockwise. If the automobile is reversely towed, namely, the wheels of the automobile drive the output shaft 12 to rotate clockwise, at this moment, the output shaft 12 drives the planet carrier 15 to rotate as a driving part, the planet carrier 15 is driven to rotate clockwise, the second planet wheel 142 rotates clockwise, and because the unidirectional transmission member 20 can rotate clockwise, the second planet wheel 142 can drive the unidirectional transmission member 20 to rotate clockwise, so that the planet carrier 15 drives the unidirectional transmission member 20 to idle, and the first planet wheel 141 coaxial with the second planet wheel 142 cannot drive the sun wheel to rotate, so that the torque of the output shaft 12 cannot be transmitted to the sun wheel. Therefore, when the output shaft 12 is rotated clockwise, torque is not transmitted from the carrier 15 to the sun gear, and the motor can be prevented from being dragged backwards by the wheels.

The planetary assembly 14 can be implemented as three, and three planetary assemblies 14 are circumferentially distributed on the planet carrier 15 and simultaneously externally meshed with the sun gear.

The one-way transmission member 20 is implemented as a one-way clutch. The one-way clutch has only one rotational direction. The one-way clutch enables one-way locking such that the one-way clutch is fixed in a certain direction. The one-way clutch is simple in structure and compact in connection, and can solve the problem that the motor is dragged reversely by fewer parts.

The speed change member further comprises an annulus 13, the annulus 13 being provided in the one-way clutch, which is engaged by the annulus 13 in the second planet wheels 142, i.e. the one-way clutch is able to restrict the direction of rotation of the annulus 13, e.g. the annulus 13 may only rotate in a clockwise direction and not in a counter-clockwise direction.

Specifically, the rotational direction of the one-way clutch is the same as the direction in which the motor rotates. For example, the motor drives the sun gear to rotate clockwise, the sun gear drives the first planet gear 141 to rotate counterclockwise, the second planet gear 141 drives the ring gear 13 in the one-way clutch to rotate counterclockwise, the one-way clutch cannot rotate counterclockwise, and the ring gear 13 can be analogized to be in a fixed state, so the planet carrier 15 can rotate clockwise, the planet carrier 15 can transmit torque to the output shaft 12, and the output shaft 12 drives the wheels to rotate. And when the output shaft 12 is driven by the wheel and clockwise rotates, the planet carrier 15 passes through the second planet wheel 142 with the ring gear 13 internal gearing can drive the ring gear 13 clockwise rotates, because the ring gear 13 is set up in one-way clutch, the ring gear 13 can rotate in clockwise, consequently, the pivoted moment of torsion of planet carrier 15 can drive the ring gear 13 idle on one-way clutch, and can't drive the sun gear rotates.

Referring to fig. 1 to 5, a drive transmission system of an electric vehicle according to a preferred embodiment of the present invention will be described in detail below. The electric vehicle drive transmission system comprises an electric motor 30, a differential 40 and an electric vehicle transmission structure.

The electric vehicle transmission structure is in transmission connection with the motor 30 and the differential 40, so that the torque of the motor 30 is transmitted to the differential 40 in one direction. The transmission of the electric vehicle transmission structure can prevent the motor 30 from being dragged reversely by the differential 40, and electric energy of the electric vehicle is prevented from being consumed.

Electric automobile transmission structure be concentrated set up in motor 30, electric automobile transmission structure is located motor 30 is inside can give electric automobile transmission structure provides the protection, avoids external foreign matter to influence electric automobile transmission structure's cooperation.

The motor 30 includes a housing 31, a stator 32 and a rotor 33, the housing 31 forms a mounting cavity 302, the stator 32 is disposed on the housing 31, the rotor 33 is rotatably disposed on the housing 31, and the stator 32 and the rotor 33 are both disposed in the mounting cavity 302, wherein the rotor 33 has a rotor shaft, and the rotor 33 is rotatably connected to the housing 31 through the rotor shaft. The sun gear is provided to the rotor shaft, and rotates synchronously when the rotor 33 rotates.

The housing 31 further forms an accommodating cavity 301, and the unidirectional transmission member 20 is disposed in the housing 31 and located in the accommodating cavity 301. The planetary assembly 14, the planet carrier 15, the one-way clutch and the differential 40 are located in the accommodating cavity 301, so that stable matching of structures in the motor 30 can be ensured.

The output shaft 12 is arranged to be in transmission connection with the differential 40, the output shaft 12 extends to the outside of the accommodating cavity 301, and the output shaft 12 is used for being in transmission connection with wheels of the outside so as to output torque to the outside.

Specifically, when the rotor 33 rotates clockwise relative to the housing 31 by means of a rotor shaft, the sun gear rotates clockwise synchronously, wherein the planetary assembly 14 and the planet carrier 15 also rotate correspondingly, and the differential 40 drives the output shaft 12 to rotate, so that the torque is output to the outside.

The motor 30 further includes a rotating shaft 34, and the rotating shaft 34 is in transmission connection with the differential 40. The rotating shaft 34 penetrates through the rotor 33 and extends to the outside of the housing 31, and the rotating shaft 34 can freely rotate inside the rotor 33 without interference in the rotating process.

The rotating shaft 34 and the output shaft 12 are both provided with conical matching gears.

The differential mechanism 40 includes a housing 41 and two conical gears 42, the housing 41 is disposed on the carrier 15, the conical gears 42 are rotatably disposed inside the housing 41 in the direction perpendicular to the axial direction of the rotor 33, and both the conical gears 42 are engaged with the conical mating gears in the rotating shaft 34 and the output shaft 12. When the planet carrier 15 rotates, the two conical gears 42 in the housing 41 can mesh with the conical mating gears, so as to drive the rotating shaft 34 and the output shaft 12 to rotate, so that the electric vehicle driving transmission system has two output ends for outputting torque.

The motor 30 further includes at least four bearings 35, at least two bearings 35 are sleeved on the rotor shaft, and the rotor shaft is connected to the housing 31 in a rotating manner, at least one bearing 35 is sleeved on the planet carrier 15, and the planet carrier 15 is connected to the housing 31 in a rotating manner, and at least one bearing 35 is sleeved on the output shaft 12, and the output shaft 12 is connected to the housing 31 in a rotating manner.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The advantages of the present invention are already complete and effectively realized. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims

1. Electric automobile transmission structure is suitable for the moment of torsion one-way transmission with the motor to external follower, its characterized in that, electric automobile transmission structure includes:

2. The electric vehicle transmission of claim 1, wherein the input member is implemented as a sun gear;

3. The electric vehicle transmission according to claim 2, wherein the planetary assemblies are implemented in three.

4. The electric vehicle transmission structure according to claim 2, wherein the one-way transmission member is implemented as a one-way clutch that is held outside the carrier and is in transmission connection with the second planetary gears.

5. The electric vehicle transmission structure according to claim 4, wherein the speed change member further includes a ring gear provided to the one-way clutch, the one-way clutch being internally meshed with the second planetary gears via the ring gear.

6. Electric automobile drive transmission system, its characterized in that, electric automobile drive transmission system includes:

a motor;

a differential mechanism; and

the electric vehicle transmission structure according to any one of claims 2 to 5, wherein the electric vehicle transmission structure is provided with a one-way transmission connecting the motor and the differential.

7. The electric vehicle drive transmission system of claim 6, wherein the electric vehicle transmission structure is centrally disposed on the electric machine.

8. The electric vehicle drive transmission system of claim 7, wherein the electric machine includes a housing, a stator, and a rotor, the housing defines a receiving cavity and a mounting cavity, the stator is disposed in the housing, the rotor is rotatably disposed in the housing, the stator and the rotor are both located in the mounting cavity, the sun gear is disposed in the rotor, and the planetary assembly, the planet carrier, and the one-way transmission member are all located in the receiving cavity.

9. The electric vehicle drive transmission system of claim 8, wherein the electric machine further comprises a rotatable shaft drivingly connected to the differential, the rotatable shaft extending through the rotor and out of the housing.

10. The electric vehicle drive transmission system of claim 8, wherein the differential is located in the receiving cavity.