CN214450257U - Hybrid transmission, hybrid transmission system and vehicle - Google Patents

Abstract

The present disclosure relates to a hybrid transmission, a hybrid transmission system and a vehicle, the hybrid transmission including: the input shaft is provided with a first disconnecting device so as to be connected with the engine through the first disconnecting device; the output shaft is used for being connected with an axle; the planet row is arranged between the input shaft and the output shaft, first clutches are respectively arranged between the input shaft and a sun gear and a gear ring of the planet row, brakes are respectively connected to the sun gear and the gear ring, and a planet carrier of the planet row is connected to the output shaft; and a first motor connected to the input shaft. The hybrid power transmission has the advantages that different combinations of the single planetary gear set, the clutch and the brake are adopted, three gears can be realized through the planetary gear set, the hybrid power transmission has the advantages of flexible gear shifting, high transmission efficiency, compact structure, simplicity and the like, in addition, the transmission ratios of the corresponding gears of the hybrid power transmission provided by the disclosure in different modes are the same, and the control stability of the whole vehicle is improved.

Description

Hybrid transmission, hybrid transmission system and vehicle

Technical Field

The present disclosure relates to the field of vehicle powertrain technologies, and in particular, to a hybrid transmission, a hybrid transmission system, and a vehicle.

Background

Current hybrid drive systems can be divided into two categories, one is an add-on hybrid system, i.e., a motor is mounted in a suitable position in the power transmission path based on the existing conventional engine power assembly; the other is a special hybrid transmission, one or more motors are integrated into the transmission to form an automatic speed change system with the motors, and the automatic speed change system is matched with the power input of the existing engine to realize the function of hybrid driving. At present, aiming at a power-split hybrid power transmission taking a planet row as a main part, along with the increase of the planet row, the structure of the transmission is more complex, and aiming at a single-row planet wheel, the problems of small gear number, low transmission efficiency, low gear shifting speed and the like exist.

SUMMERY OF THE UTILITY MODEL

A first object of the present disclosure is to provide a hybrid transmission capable of solving the problems of a hybrid transmission using a single row of planetary gears, such as a small number of gears, a slow shift speed, and the like.

A second object of the present disclosure is to provide a hybrid transmission system using the hybrid transmission provided by the present disclosure.

A third object of the present disclosure is to provide a vehicle including the hybrid transmission system provided by the present disclosure.

In order to achieve the above object, the present disclosure provides a hybrid transmission including: the input shaft is provided with a first disconnecting device so as to be connected with an engine through the first disconnecting device; the output shaft is used for being connected with an axle; the planet row is arranged between the input shaft and the output shaft, first clutches are respectively arranged between the input shaft and a sun gear and a gear ring of the planet row, brakes are respectively connected to the sun gear and the gear ring, and a planet carrier of the planet row is connected to the output shaft; and a first motor connected to the input shaft.

Optionally, the end of the input shaft connected to the planet carrier includes an inner shaft connected to the sun gear, and an outer shaft surrounding the inner shaft and connected to the ring gear, and the first clutch is configured as a dual clutch structure having a first clutch structure connected to the inner shaft and a second clutch structure connected to the outer shaft.

Optionally, the motor shaft of the first motor and the input shaft are arranged coaxially.

Optionally, the first disconnect device is a second clutch disposed on the input shaft.

Optionally, the hybrid transmission further comprises a damping device disposed on the input shaft.

According to a second aspect of the present disclosure, there is also provided a hybrid transmission system comprising a front drive unit and a rear drive unit, one of the front drive unit and the rear drive unit comprising an engine and the above-described hybrid transmission.

Optionally, the front drive unit includes a front drive transmission for connecting with a front axle, the front drive transmission is the above hybrid transmission, the rear drive unit includes a rear drive transmission for connecting with a rear axle, the rear drive transmission includes a second motor, a transmission mechanism disposed between the second motor and the rear axle, and a second disconnect device for controlling on/off of the second motor.

Optionally, the second disconnect device is a third clutch disposed on a motor shaft of the second motor.

Optionally, the rear-drive transmission further comprises a main shaft connected between the second motor and the rear axle, the transmission mechanism comprises a driving gear connected to a motor shaft of the second motor in a torsion-proof manner and a driven gear arranged on the main shaft in a free sleeve manner, and a synchronizer capable of selectively engaging with the driven gear is connected to the main shaft.

According to a third aspect of the present disclosure, there is also provided a vehicle including the hybrid transmission system described above, wherein a differential is provided on an axle of the vehicle, and the output shaft is connected to the differential.

Through the technical scheme, different combinations of the single-group planetary gear set, the clutch and the brake are adopted, three gears can be realized through the single-group planetary gear set, and the hybrid power transmission has the advantages of flexible gear shifting, high transmission efficiency, compact structure, simplicity and the like.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a schematic block diagram illustration of a hybrid transmission provided in an exemplary embodiment of the present disclosure;

FIGS. 2 and 3 are schematic structural views of a hybrid transmission provided in accordance with another exemplary embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a rear drive transmission provided by an exemplary embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a rear drive transmission provided by another exemplary embodiment of the present disclosure;

fig. 6a to 8 are schematic structural views of power transmission paths in different driving modes of a vehicle according to an exemplary embodiment of the present disclosure.

Description of the reference numerals

11-input shaft, 111-first disconnecting device, 112-damping device, 113-internal shaft, 114-external shaft, 12-output shaft, 13-first motor, 14-first clutch, 151-sun gear, 152-ring gear, 153-planet carrier, 161, 162-brake, 2-engine, 30-main shaft, 31-second motor, 321-third clutch, 322-synchronizer, 331-driving gear, 332-driven gear, 4-differential.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, the terms of orientation such as "front" and "rear" used in the present disclosure refer to the inner and outer of the outlines of the respective components with respect to the traveling direction of the vehicle, and the terms "first" and "second" and the like used in the present disclosure are used to distinguish one element from another, and have no order or importance. In addition, when the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements, unless otherwise indicated.

Referring to fig. 1 to 3, the present disclosure provides a hybrid transmission including an input shaft 11, an output shaft 12, a planetary row, and a first motor 13, wherein a first disconnecting device 111 is provided on the input shaft 11 to be connected with an engine 2 through the first disconnecting device 111; the output shaft 12 is used for connecting with an axle; the planet row is arranged between the input shaft 11 and the output shaft 12, the first clutches 14 are respectively arranged between the input shaft 11 and the sun gear 151 and the ring gear 152 of the planet row, the brakes are respectively connected to the sun gear 151 and the ring gear 152, and the planet carrier 153 of the planet row is connected to the output shaft 12; the first motor 13 is connected to the input shaft 11.

Here, when the hybrid transmission is designed, the first motor 13 and the single planetary gear set are integrated in the transmission case in consideration of the function of the motor to form a dedicated hybrid transmission, and the transmission structure is integrated to realize an integrated design. The hybrid transmission herein may be a forward-drive transmission or a rear-drive transmission to achieve forward-drive or rear-drive functions, respectively.

Specifically, referring to fig. 2, when the first clutch C1 is engaged, the brake 161 is disengaged, the first clutch C2 is disengaged, and the brake 162 is engaged, that is, the ring gear 152 of the planetary gear set is fixed, the sun gear 151 is a driving member, which drives the carrier 153 to rotate and transmits power to the output shaft 12, so as to realize first-gear power output;

when the first clutch C1 is disconnected, the brake 161 is engaged, the first clutch C2 is engaged, and the brake 162 is disconnected, that is, the sun gear 151 of the planetary row is fixed, the ring gear 152 is a driving part, drives the planet carrier 153 to rotate, and transmits power to the output shaft 12, so that the two-gear power output is realized;

when the first clutch C1 is engaged, the brake 161 is disengaged, the first clutch C2 is engaged, and the brake 162 is disengaged, i.e., there is no relative motion between the entire planetary rows, and the planetary rows rotate as a unit, the gear ratio is 1, and the direct gear power output is achieved.

Through the technical scheme, different combinations of the single-group planetary gear set, the clutch and the brake are adopted, three gears can be realized through the single-group planetary gear set, and the hybrid power transmission has the advantages of flexible gear shifting, high transmission efficiency, compact structure, simplicity and the like.

In an exemplary embodiment of the present disclosure, referring to fig. 3, the end of the input shaft 11 connected to the planetary row includes an inner shaft 113 connected to the sun gear 151, and an outer shaft 114 surrounding the inner shaft 113 and connected to the ring gear 152, the first clutch 14 is configured as a dual clutch structure having a first clutch structure connected to the inner shaft 113 and a second clutch structure connected to the outer shaft 114, when the first clutch structure is engaged, the connection of the input shaft 11 and the sun gear 151 is achieved, when the second clutch structure is engaged, the connection of the input shaft 11 and the ring gear 152 is achieved, when the first clutch structure and the second clutch structure are simultaneously engaged, the connection of the sun gear 151 and the ring gear 152 to the input shaft 11 is achieved, and a three-gear shift is achieved by one clutch and two brakes.

Referring to fig. 2, the first electric machine 13 may be in series with the engine 2, i.e., a motor shaft of the first electric machine 13 and the input shaft 11 are coaxially arranged. In other embodiments, the first electric machine 13 may be connected in parallel with the engine 2, and all fall within the protection scope of the present disclosure.

The first disconnecting device 111 may be a second clutch provided on the input shaft 11, the first disconnecting device 111 being engaged, turning on the engine 2, participating in power input; the first disconnecting device 111 is disconnected, so that the power input of the engine 2 can be directly cancelled, and the hybrid power transmission can be switched among different working modes such as an engine direct drive mode, a pure electric drive mode and a hybrid power drive mode.

Referring to fig. 2, the present disclosure provides a hybrid transmission further including a damper device 112, such as a damper, disposed on the input shaft 11, for reducing torsional rigidity of a portion where a crankshaft of the engine is engaged with the main input shaft 11, thereby performing a damping function and ensuring stability of power transmission.

According to a second aspect of the present disclosure, there is also provided a hybrid transmission system comprising a front drive unit and a rear drive unit, wherein one of the front drive unit and the rear drive unit comprises an engine 2 and the above-described hybrid transmission to achieve a forward-drive or a rear-drive function.

In an exemplary embodiment of the disclosure, the front drive unit comprises a front drive transmission for connection with a front axle, the front drive transmission is designed as a hybrid transmission as described above, the rear drive unit comprises a rear drive transmission for connection with a rear axle, and the rear drive transmission is designed separately, with reference to fig. 4 and 5, the rear drive transmission comprises a second electric machine 31, a transmission mechanism arranged between the second electric machine 31 and the rear axle, and a second disconnection device for controlling the second electric machine 31 to be disconnected. When the second disconnecting device is connected, the second motor 31 inputs power, the four-wheel drive function is realized, and the trafficability characteristic and the control stability of the whole vehicle are improved; when the second disconnect device is engaged, the power input to the second motor 31 is cancelled, and only the forward drive function is achieved. In addition, the rear-drive transmission can compensate the torque of the front-drive transmission, unpowered interruption in the gear shifting process is realized, and the designed gear number of a certain transmission can be reduced through the coordinated control of the front-drive transmission and the rear-drive transmission, so that the transmission is more compact, and the cost is reduced.

More specifically, in an exemplary embodiment of the present disclosure, referring to fig. 4, the second disconnection means may be a third clutch 321 disposed on a motor shaft of the second motor 31. The rear-drive transmission also comprises a main shaft 30 connected between the second motor 31 and a rear axle, the transmission mechanism comprises a driving gear connected to a motor shaft of the second motor 31 in an anti-torsion manner and a driven gear connected to the main shaft 30 in an anti-torsion manner, and power of the second motor 31 is transmitted to the rear axle by controlling the on-off of the third clutch 321, so that rear drive is realized.

More specifically, in another exemplary embodiment of the present disclosure, referring to fig. 5, the rear drive transmission further includes a main shaft 30 connected between the second motor 31 and the rear axle, the transmission mechanism includes a driving gear 331 connected to a motor shaft of the second motor 31 in a non-rotating manner and a driven gear 332 provided on the main shaft 30 in a non-rotating manner, and the main shaft 30 is connected to a synchronizer 322 capable of selectively engaging the driven gear 332. When the synchronizer 322 is engaged with the driven gear 332, the power of the second motor 31 can be applied to the rear axle; when the synchronizer 322 is disconnected, the power input of the second motor 31 may be disconnected.

According to a third aspect of the present disclosure, a vehicle is further provided, which includes the hybrid transmission system, specifically, referring to fig. 1, a differential 4 is provided on an axle of the vehicle, and a transmission gear engaged with the differential 4 is provided on the output shaft 12. By adopting the engine 2, the first motor 13, the second motor 31 and the single-group planet row and controlling the clutch, the brake and the synchronizer, the vehicle can have different working modes such as pure electric, direct drive and hybrid, has the advantages of high transmission efficiency, flexible adjustment of the working point of the engine, simple structure, convenient control and the like, has all the beneficial effects of the hybrid transmission and the hybrid speed change system, and is not repeated herein.

Taking as an example the embodiment shown in fig. 1 for the front drive transmission and the embodiment shown in fig. 5 for the rear drive transmission, the present disclosure provides a vehicle having:

pure electric drive mode:

as shown in fig. 6a, the first motor 13 inputs power, the first disconnecting device 111 is disconnected, the first clutch C1 is engaged, the brake 161 is disconnected, the first clutch C2 is disconnected, the brake 162 is engaged, and the power transmission path is: the input shaft 11, the sun gear 151, the planet carrier 153, the output shaft 12 and the differential 4 achieve pure electric front-drive 1-gear power output;

as shown in fig. 6b, the first motor 13 inputs power, the first disconnecting device 111 is disconnected, the first clutch C1 is disconnected, the brake 161 is engaged, the first clutch C2 is engaged, the brake 162 is disconnected, and the power transmission path is: the input shaft 11, the gear ring 152, the planet carrier 153, the output shaft 12 and the differential 4 achieve pure electric front-drive 2-gear power output;

as shown in fig. 6C, the first motor 13 inputs power, the first disconnecting device 111 is disconnected, the first clutch C1 is engaged, the brake 161 is disconnected, the first clutch C2 is engaged, the brake 162 is disconnected, and the power transmission path is: the input shaft 11, the sun gear 151, the gear ring 152, the planet carrier 153, the output shaft 12 and the differential 4 achieve pure electric front-drive 3-gear power output;

as shown in fig. 6e, the second motor 31 inputs power, the synchronizer 322 is engaged with the driven gear 332, and the power transmission paths are: the driving gear 331-the driven gear 332-the main shaft 30-the differential 4 realize pure electric rear driving force output;

of course, when fig. 6a to 6c are combined with fig. 6e, the first electric machine 13 and the second electric machine 31 input power, and power output of 1 gear, 2 gear and 3 gear in the electric four-wheel drive mode can be realized.

Direct drive mode of the engine:

as shown in fig. 7a, the engine 2 inputs power, the first disconnecting device 111 is engaged, the first clutch C1 is engaged, the brake 161 is disengaged, the first clutch C2 is disengaged, the brake 162 is engaged, and the power transmission path is: the input shaft 11, the sun gear 151, the planet carrier 153, the output shaft 12 and the differential 4 realize direct drive 1-gear power output of the engine;

as shown in fig. 7b, the engine 2 inputs power, the first disconnecting device 111 is engaged, the first clutch C1 is disconnected, the brake 161 is engaged, the first clutch C2 is engaged, the brake 162 is disconnected, and the power transmission path is: the input shaft 11, the gear ring 152, the planet carrier 153, the output shaft 12 and the differential 4 realize direct drive 2-gear power output of the engine;

as shown in fig. 7C, the engine 2 inputs power, the first disconnecting device 111 is engaged, the first clutch C1 is engaged, the brake 161 is disengaged, the first clutch C2 is engaged, the brake 162 is disengaged, and the power transmission path is: the input shaft 11, the sun gear 151, the gear ring 152, the planet carrier 153, the output shaft 12 and the differential 4 achieve direct-drive 3-gear power output of the engine.

Hybrid drive mode:

fig. 7a to 7c are combined with fig. 6e, respectively, the engine 2 and the second motor 31 input power, and power output of 1 st gear, 2 nd gear, and 3 rd gear in the hybrid four-wheel drive mode can be realized, in addition, in this drive mode, when the power demand is large, the first motor 13 can participate in power output for assisting the engine, and in case of small power demand, the second motor 31 can meet the drive requirement, and at this time, the first motor 13 only serves as follow-up and does not output power.

An idle power generation mode: as shown in fig. 8, the first disconnecting device 111 is engaged, the first clutch 14 and the synchronizer 322 are both disconnected, and the kinetic energy of the engine 2 is converted into electric energy of the first electric machine 13 to supply electricity to the vehicle itself.

Series driving mode: in this mode of operation, combining fig. 8 and fig. 6e, the second electric machine 31 is enabled to drive the vehicle to travel, while the engine 2 drives the first electric machine 13 to generate electricity.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (10)

1. A hybrid transmission, comprising:

an input shaft (11), wherein a first disconnecting device (111) is arranged on the input shaft (11) so as to be connected with an engine (2) through the first disconnecting device (111);

an output shaft (12) for connection with an axle;

the planetary row is arranged between the input shaft (11) and the output shaft (12), first clutches (14) are respectively arranged between the input shaft (11) and a sun gear (151) and a ring gear (152) of the planetary row, brakes are respectively connected to the sun gear (151) and the ring gear (152), and a planet carrier (153) of the planetary row is connected to the output shaft (12); and

a first electric machine (13) connected to the input shaft (11).

2. A hybrid transmission according to claim 1, characterised in that the input shaft (11) at its end connected to the planetary row comprises an inner shaft (113) connected to the sun gear (151) and an outer shaft (114) surrounding the inner shaft (113) and connected to the ring gear (152), the first clutch (14) being configured as a double clutch arrangement with a first clutch arrangement connected to the inner shaft (113) and a second clutch arrangement connected to the outer shaft (114).

3. Hybrid transmission according to claim 1, characterized in that the motor shaft of the first electric machine (13) and the input shaft (11) are arranged coaxially.

4. Hybrid transmission according to claim 1, characterised in that the first disconnection means (111) is a second clutch provided on the input shaft (11).

5. The hybrid transmission according to claim 1, characterized in that it further comprises a damping device (112) provided on the input shaft (11).

6. Hybrid transmission system comprising a front drive unit and a rear drive unit, characterized in that one of the front drive unit and the rear drive unit comprises an engine (2) and a hybrid transmission according to any of claims 1-5.

7. Hybrid transmission system according to claim 6, characterised in that the front drive unit comprises a front-wheel drive transmission for connection with a front axle, the front-wheel drive transmission being a hybrid transmission according to any of claims 1-5, and the rear drive unit comprises a rear-wheel drive transmission for connection with a rear axle, the rear-wheel drive transmission comprising a second electric machine (31), a transmission arranged between the second electric machine (31) and the rear axle, and second disconnection means for controlling the second electric machine (31) to be disconnected.

8. Hybrid transmission system according to claim 7, characterized in that said second disconnection means is a third clutch (321) arranged on the motor shaft of said second electric machine (31).

9. Hybrid transmission system according to claim 7, characterized in that it further comprises a main shaft (30) connected between said second electric machine (31) and a rear axle, said transmission comprising a driving gear (331) non-rotatably connected to the motor shaft of said second electric machine (31) and a driven gear (332) idly disposed on said main shaft (30), said main shaft (30) being connected to a synchronizer (322) able to selectively engage said driven gear (332).

10. A vehicle comprising a hybrid transmission system according to any one of claims 6-9, a differential (4) being arranged on an axle of the vehicle, the output shaft (12) being connected to the differential (4).

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