阅读说明：本技术 一种自动变速器及车辆 (Automatic transmission and vehicle ) 是由 徐志超 刘意气 傅灵玲 谭艳军 林霄喆 于 2019-10-08 设计创作，主要内容包括：本发明提供了一种自动变速器及车辆,涉及车辆传动机构技术领域。本发明的自动变速器包括进挡传动系统和倒挡传动系统。进挡传动系统包括多个从动齿轮和至少一个输出轴。倒挡传动系统包括：输入锥齿轮,与进挡传动系统的一个从动齿轮固连；输出锥齿轮,与进挡传动系统的一个输出轴固连；换向锥齿轮,设置在输入锥齿轮与输出锥齿轮之间,换向锥齿轮具有伸出状态和收缩状态,当换向锥齿轮处于收缩状态时,输出锥齿轮不随输入锥齿轮一起转动；当换向锥齿轮处于伸出状态时,输出锥齿轮随输入锥齿轮一起转动。本发明的自动变速器的锥齿轮结构的布置,使得变速器结构紧凑并且实现输出扭矩换向功能,满足倒挡需求的同时节省径向空间与轴向空间。(The invention provides an automatic transmission and a vehicle, and relates to the technical field of vehicle transmission mechanisms. The automatic transmission of the present invention includes a forward drive train and a reverse drive train. The geared drive train includes a plurality of driven gears and at least one output shaft. The reverse gear transmission system comprises: the input bevel gear is fixedly connected with a driven gear of the gear-shifting transmission system; the output bevel gear is fixedly connected with one output shaft of the gear-in transmission system; the reversing bevel gear is arranged between the input bevel gear and the output bevel gear, the reversing bevel gear has an extending state and a contracting state, and when the reversing bevel gear is in the contracting state, the output bevel gear does not rotate along with the input bevel gear; when the reversing bevel gear is in an extended state, the output bevel gear rotates with the input bevel gear. The bevel gear structure of the automatic transmission is arranged, so that the transmission is compact in structure, the output torque reversing function is realized, the reverse gear requirement is met, and the radial space and the axial space are saved.)

1. An automatic transmission comprising a forward drive system and a reverse drive system, wherein the forward drive system comprises a plurality of driven gears and at least one output shaft; the reverse gear transmission system comprises:

the input bevel gear is fixedly connected with one driven gear of the gear-shifting transmission system;

the output bevel gear is fixedly connected with one output shaft of the gear-shifting transmission system;

a reversing bevel gear disposed between the input bevel gear and the output bevel gear, the reversing bevel gear having an extended state and a retracted state, the output bevel gear not rotating with the input bevel gear when the reversing bevel gear is in the retracted state; when the reversing bevel gear is in the extended state, the output bevel gear rotates with the input bevel gear.

2. The automatic transmission of claim 1,

the reverse gear transmission system further comprises a guide post, and the guide post is connected with the reversing bevel gear and used for limiting the movement direction and the movement stroke of the reversing bevel gear and providing support for the reversing bevel gear.

3. The automatic transmission of claim 1,

the step-in transmission system further comprises:

a double clutch;

an input shaft system including an input shaft and a plurality of driving gears connected to the input shaft, the input shaft being connected to the dual clutch, the power transmitted from the dual clutch being transmitted to the driving gears through the input shaft; and

the output shaft system comprises an output shaft, a synchronizer connected with the output shaft and a plurality of driven gears connected with the output shaft through the synchronizer, and the driven gears are meshed with the corresponding driving gears so as to transmit the power of the driving gears out of the output shaft through the driven gears.

4. The automatic transmission of claim 3,

the input shaft comprises a first input shaft and a second input shaft, the first input shaft and the second input shaft are both connected with the output end of the double clutch, the first input shaft is a solid shaft, the second input shaft is a hollow shaft, and the second input shaft is sleeved on the first input shaft.

5. The automatic transmission of claim 4,

the driving gears comprise five;

the first input shaft is provided with a first-gear driving gear, a third-fifth-gear driving gear and a seventh-gear driving gear, and the first-gear driving gear, the third-fifth-gear driving gear and the seventh-gear driving gear are respectively meshed with a corresponding first-gear driven gear, a corresponding third-gear driven gear, a corresponding fifth-gear driven gear and a corresponding seventh-gear driven gear;

the second input shaft is provided with a second-fourth-gear driving gear and a sixth-eighth-gear driving gear, the second-fourth-gear driving gear is meshed with a second-gear driven gear and a fourth-gear driven gear respectively, and the sixth-eighth-gear driving gear is meshed with a sixth-gear driven gear and an eighth-gear driven gear respectively.

6. The automatic transmission of claim 3,

the output shaft comprises a first output shaft and a second output shaft, and the first output shaft and the second output shaft are both connected with a differential so as to transmit power transmitted to the output shaft out through the differential.

7. The automatic transmission of claim 6,

the driven gears comprise eight;

the first output shaft is fixedly connected with a first-gear synchronizer, a third-gear synchronizer and a second-gear synchronizer, the first output shaft is connected with a first-gear driven gear and a third-gear driven gear through the first-gear synchronizer, and the first output shaft is connected with a second-gear driven gear or a sixth-gear driven gear through the second-gear synchronizer and the sixth-gear synchronizer so as to transmit the power of the first-gear driven gear, the third-gear driven gear, the second-gear driven gear or the sixth-gear driven gear;

the second output shaft is fixedly connected with a fourth-eight gear synchronizer and a fifth-seventh gear synchronizer, the second output shaft is connected with a fourth-gear driven gear and an eighth-gear driven gear through the fourth-eight gear synchronizer, and the second output shaft is connected with a fifth-gear driven gear and a seventh-gear driven gear through the fifth-seventh gear synchronizer so as to transmit the power of the fourth-gear driven gear, the eighth-gear driven gear, the fifth-gear driven gear or the seventh-gear driven gear.

8. The automatic transmission of claim 7,

the input bevel gear is fixedly connected to the end face of the first-gear driven gear, and the output bevel gear is fixedly connected with the first output shaft so as to output reverse gear power through the first gear.

9. The automatic transmission according to claim 7 or 8,

when the reversing bevel gear is in the contraction state, the output bevel gear does not rotate along with the input bevel gear, the transmission drives the vehicle to enter a forward working condition, and the vehicle runs forwards in different gears; when the reversing bevel gear is in the extending state, the output bevel gear rotates along with the input bevel gear, the transmission drives the vehicle to enter a reverse gear working condition, and the vehicle backs up backwards.

10. A vehicle characterized by comprising the automatic transmission of any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of vehicle transmission mechanisms, in particular to an automatic transmission and a vehicle.

Background

The dual-clutch automatic transmission has the advantages of being high in competition of transmission products used by passenger vehicles, higher in performance requirement of the transmission, rapid in power response, good in operation experience, relatively low in cost and the like, and has become one of important development directions. The transmission system structure of the double-clutch automatic transmission is the core design content of the transmission, and plays a decisive role in light weight and miniaturization, so that the compact and efficient arrangement structure has very important significance. The compact transmission system layout can more easily realize multi-platform carrying of transmission products; in a very limited space, the realization of a wider speed ratio range is beneficial to improving the whole transmission efficiency and achieving higher power output and better oil consumption level. In the prior transmission, in order to realize the torque direction change of the reverse gear, a single reverse gear shaft is arranged, but a reverse gear occupies a large amount of radial space. Or an arrangement with a pair of additional gears on both output shafts, but a reverse gear set would increase axial space.

Disclosure of Invention

An object of the present invention is to provide an automatic transmission that solves the problem of large space occupation of the existing transmission.

The invention also aims to solve the problems of narrow speed ratio range and low transmission efficiency in the prior art.

It is an object of the present invention to provide a vehicle having the above automatic transmission.

In particular, the present invention provides an automatic transmission comprising a forward drive train and a reverse drive train, wherein the forward drive train comprises a plurality of driven gears and at least one output shaft; the reverse gear transmission system comprises:

the input bevel gear is fixedly connected with one driven gear of the gear-shifting transmission system;

the output bevel gear is fixedly connected with one output shaft of the gear-shifting transmission system;

a reversing bevel gear disposed between the input bevel gear and the output bevel gear, the reversing bevel gear having an extended state and a retracted state, the output bevel gear not rotating with the input bevel gear when the reversing bevel gear is in the retracted state; when the reversing bevel gear is in the extended state, the output bevel gear rotates with the input bevel gear.

Optionally, the reverse gear transmission system further comprises a guide post, and the guide post is connected with the reversing bevel gear, and is used for limiting the movement direction and the movement stroke of the reversing bevel gear and providing support for the reversing bevel gear.

Optionally, the geared transmission system further comprises:

a double clutch;

an input shaft system including an input shaft and a plurality of driving gears connected to the input shaft, the input shaft being connected to the dual clutch, the power transmitted from the dual clutch being transmitted to the driving gears through the input shaft;

the output shaft system comprises an output shaft, a synchronizer connected with the output shaft and a plurality of driven gears connected with the output shaft through the synchronizer, and the driven gears are meshed with the corresponding driving gears so as to transmit the power of the driving gears out of the output shaft through the driven gears.

Optionally, the input shaft includes a first input shaft and a second input shaft, the first input shaft and the second input shaft are both connected to the output end of the dual clutch, the first input shaft is a solid shaft, the second input shaft is a hollow shaft, and the second input shaft is sleeved on the first input shaft.

Optionally, the drive gears include five;

the first input shaft is provided with a first-gear driving gear, a third-fifth-gear driving gear and a seventh-gear driving gear, and the first-gear driving gear, the third-fifth-gear driving gear and the seventh-gear driving gear are respectively meshed with a corresponding first-gear driven gear, a corresponding third-gear driven gear, a corresponding fifth-gear driven gear and a corresponding seventh-gear driven gear;

the second input shaft is provided with a second-fourth-gear driving gear and a sixth-eighth-gear driving gear, the second-fourth-gear driving gear is meshed with a second-gear driven gear and a fourth-gear driven gear respectively, and the sixth-eighth-gear driving gear is meshed with a sixth-gear driven gear and an eighth-gear driven gear respectively.

Optionally, the output shaft includes a first output shaft and a second output shaft, and the first output shaft and the second output shaft are both connected to a differential so as to transmit the power transmitted to the output shaft through the differential.

Optionally, the driven gears comprise eight;

the first output shaft is fixedly connected with a first-gear synchronizer, a third-gear synchronizer and a second-gear synchronizer, the first output shaft is connected with a first-gear driven gear and a third-gear driven gear through the first-gear synchronizer, and the first output shaft is connected with a second-gear driven gear or a sixth-gear driven gear through the second-gear synchronizer and the sixth-gear synchronizer so as to transmit the power of the first-gear driven gear, the third-gear driven gear, the second-gear driven gear or the sixth-gear driven gear;

the second output shaft is fixedly connected with a fourth-eight gear synchronizer and a fifth-seventh gear synchronizer, the second output shaft is connected with a fourth-gear driven gear and an eighth-gear driven gear through the fourth-eight gear synchronizer, and the second output shaft is connected with a fifth-gear driven gear and a seventh-gear driven gear through the fifth-seventh gear synchronizer so as to transmit the power of the fourth-gear driven gear, the eighth-gear driven gear, the fifth-gear driven gear or the seventh-gear driven gear.

Optionally, the input bevel gear is fixedly connected to an end face of the first-gear driven gear, and the output bevel gear is fixedly connected to the first output shaft to output reverse gear power through the first gear.

Optionally, when the reversing bevel gear is in the retracted state, the output bevel gear does not rotate along with the input bevel gear, the transmission drives the vehicle to enter a forward working condition, and the vehicle travels forwards in different gears; when the reversing bevel gear is in the extending state, the output bevel gear rotates along with the input bevel gear, the transmission drives the vehicle to enter a reverse gear working condition, and the vehicle backs up backwards.

In particular, the invention also provides a vehicle including the automatic transmission described above.

The reverse gear transmission system of the automatic transmission can realize the reverse gear function by arranging a group of bevel gear structures at the driven gear and the output shaft of the gear-in transmission system, and the arrangement of the bevel gear structures ensures that the transmission structure is compact, the output torque reversing function is realized, the reverse gear requirement is met, and meanwhile, the radial space and the axial space are saved.

Furthermore, the reversing bevel gear is designed in a floating mode, torque transmission or interruption is achieved by controlling the stroke of the reversing bevel gear in the guide post, the function of the synchronizer assembly is achieved, and compared with the scheme of the synchronizer assembly, the axial space is saved.

The transmission of the invention adopts eight forward gears and one reverse gear, and can realize wider speed ratio range and higher transmission efficiency compared with six-speed and seven-speed automatic transmissions.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic structural diagram of a hybrid transmission according to an embodiment of the present invention.

Detailed Description

Fig. 1 is a schematic structural diagram of an automatic transmission 100 according to one embodiment of the invention. As shown, the automatic transmission 100 of the present invention may include an entry drive train 200 and a reverse drive train 300. The geared drive train 200 includes a plurality of driven gears and at least one output shaft. The reverse drive system 300 may include an input bevel gear 15, an output bevel gear 17, and a reverse bevel gear 16. The input bevel gear 15 is grounded to one of the driven gears of the geared drive train 200. The output bevel gear 17 is fixedly connected with one of the output shafts of the gear-shifting transmission system 200. The reversing bevel gear 16 is disposed between the input bevel gear 15 and the output bevel gear 17, the reversing bevel gear 16 having an extended state and a retracted state, the output bevel gear 17 not rotating with the input bevel gear 15 when the reversing bevel gear 16 is in the retracted state. When the reversing bevel gear 16 is in an extended state, the output bevel gear 17 rotates with the input bevel gear 15.

The reverse gear transmission system 300 of the automatic transmission 100 of the embodiment can realize the reverse gear function by arranging a set of bevel gear structures at the driven gear and the output shaft of the forward gear transmission system 200, and the arrangement of the bevel gear structures ensures that the transmission structure is compact and the output torque reversing function is realized, thereby saving radial space and axial space while meeting the reverse gear requirement.

As a specific embodiment of the present invention, the reverse gear transmission system 300 of the present embodiment further includes a guide post 70, and the guide post 70 is connected to the reverse bevel gear 16 for limiting the movement direction and the movement stroke of the reverse bevel gear 16 and providing a support for the reverse bevel gear 16. The reversing bevel gear 16 is designed in a floating mode, torque transmission or interruption is achieved by controlling the stroke of the reversing bevel gear 16 in the guide column 70, the function of a synchronizer assembly is achieved, and compared with the scheme of the synchronizer assembly, the axial space is saved.

As a specific embodiment of the present invention, the reverse drive system 200 may further include a dual clutch 50, an input shaft system and an output shaft system. The input shaft system may include input shafts 30 and 40 and a plurality of driving gears connected to the input shafts 30 and 40, the input shafts 30 and 40 are connected to the dual clutch 50, and power transmitted from the dual clutch 50 is transmitted to the driving gears through the input shafts. The output shaft system may include an output shaft, synchronizers 18, 19, 26, 27 connected to the output shafts 10, 20, and a plurality of driven gears connected to the output shafts 10, 20 through the synchronizers 18, 19, 26, 27, the driven gears being engaged with corresponding driving gears to transmit power of the driving gears through the driven gears and out of the output shafts.

The input shafts 30 and 40 comprise a first input shaft 40 and a second input shaft 30, the first input shaft 40 and the second input shaft 30 are both connected with the output end of the double clutch 50, the first input shaft 40 is a solid shaft, the second input shaft 30 is a hollow shaft, and the second input shaft 30 is sleeved on the first input shaft 40.

The driving gear includes five. The first input shaft 40 is provided with a first-gear driving gear 43, a third-fifth-gear driving gear 42 and a seventh-gear driving gear 41, and the first-gear driving gear 43, the third-fifth-gear driving gear 42 and the seventh-gear driving gear 41 are respectively meshed with the corresponding first-gear driven gear 14, the third-gear driven gear 13, the fifth-gear driven gear 24 and the seventh-gear driven gear 25. The second input shaft 30 is provided with a second-fourth gear driving gear 31 and a sixth-eighth gear driving gear 32, the second-fourth gear driving gear 31 is engaged with the second-fourth gear driven gear 11 and the fourth-fourth gear driven gear 21, and the sixth-eighth gear driving gear 32 is engaged with the sixth gear driven gear 12 and the eighth gear driven gear 22.

The output shafts 10, 20 include a first output shaft 10 and a second output shaft 20, and the first output shaft 10 and the second output shaft 20 are both connected to the differential 60, so that the power transmitted to the output shafts is transmitted through the differential 60.

The first output shaft 10 and the second output shaft 20 are disposed in parallel with the first input shaft 40 and the second input shaft 30.

The driven gears include eight. The first output shaft 10 is fixedly connected with a first-third-gear synchronizer 19 and a second-sixth-gear synchronizer 18, the first output shaft 10 is connected with a first-gear driven gear 14 and a third-gear driven gear 13 through the first-third-gear synchronizer 19, and the first output shaft 10 is connected with a second-gear driven gear 11 or a sixth-gear driven gear 12 through the second-sixth-gear synchronizer 18 so as to transmit power of the first-gear driven gear 14, the third-gear driven gear 13, the second-gear driven gear 11 or the sixth-gear driven gear 12. The second output shaft 20 is fixedly connected with a fourth-eight gear synchronizer 26 and a fifth-seventh gear synchronizer 27, the second output shaft 20 is connected with the fourth-gear driven gear 21 and the eighth-gear driven gear 22 through the fourth-eight gear synchronizer 26, and the second output shaft 20 is connected with the fifth-gear driven gear 24 and the seventh-gear driven gear 25 through the fifth-seventh gear synchronizer 27, so that the power of the fourth-gear driven gear 21, the eighth-gear driven gear 22, the fifth-gear driven gear 24 or the seventh-gear driven gear 25 is transmitted. The first output shaft 10 and the second output shaft 20 are both provided with a parking ratchet wheel 23. The input bevel gear 15 is fixedly connected to the end face of the first-gear driven gear 14, and the output bevel gear 17 is fixedly connected to the first output shaft 10 to perform reverse gear power output through the first gear.

When the reversing bevel gear 16 is in a contracted state, the output bevel gear 17 does not rotate along with the input bevel gear 15, the transmission drives the vehicle to enter a forward working condition, and the vehicle runs forwards in different gears. When the reversing bevel gear 16 is in an extended state, the output bevel gear 17 rotates along with the input bevel gear 15, the transmission drives the vehicle to enter a reverse gear working condition, and the vehicle backs up backwards.

As a specific embodiment of the present invention, the transmission line of eight forward gears and one reverse gear of the automatic transmission 100 of the present invention is as follows:

1) in the first-gear working condition, the double clutch 50 is connected with the first input shaft 40, the first-third synchronizer 19 is connected with the first-gear driven gear 14, and the reversing bevel gear 16 is in a contraction state;

first gear power transmission route: input-double clutch 50-first input shaft 40-first gear driven gear 14-first output shaft 10-differential 60-output.

2) When the two-gear working condition is met, the double clutch 50 is connected with the second input shaft 30, the second-six-gear synchronizer 18 is connected with the second-gear driven gear 11, and the reversing bevel gear 16 is in a contraction state;

a second-gear power transmission route: input-double clutch 50-second input shaft 30-two gear driven gear 11-first output shaft 10-differential 60-output.

3) In the third-gear working condition, the double clutch 50 is connected with the first input shaft 40, the first third-gear synchronizer 19 is connected with the third-gear driven gear 13, and the reversing bevel gear 16 is in a contraction state;

a third-gear power transmission route: input-double clutch 50-first input shaft 40-third gear driven gear 13-first output shaft 10-differential 60-output.

4) In the fourth-gear working condition, the double clutch 50 is connected with the second input shaft 30, the fourth-eight gear synchronizer 26 is connected with the fourth-gear driven gear 21, and the reversing bevel gear 16 is in a contraction state;

a fourth-gear power transmission route: input-double clutch 50-second input shaft 30-fourth gear driven gear 21-second output shaft 20-differential 60-output.

5) In the fifth-gear operating mode, the double clutch 50 is engaged with the first input shaft 40, the fifth-seventh-gear synchronizer 27 is engaged with the fifth-gear driven gear 24, and the reversing bevel gear 16 is in a contracted state.

A fifth-gear power transmission route: input-double clutch 50-first input shaft 40-fifth gear driven gear 24-second output shaft 20-differential 60-output.

6) In the sixth-gear operating mode, the dual clutch 50 is engaged with the second input shaft 30, the second-sixth-gear synchronizer 18 is engaged with the sixth-gear driven gear 12, and the reversing bevel gear 16 is in a contracted state.

Six-gear power transmission route: input-double clutch 50-second input shaft 30-six-gear driven gear 12-first output shaft 10-differential 60-output.

7) In the seventh-gear operating mode, the double clutch 50 is engaged with the first input shaft 40, the fifth-seventh-gear synchronizer 27 is engaged with the seventh-gear driven gear 25, and the reversing bevel gear 16 is in a contracted state.

Seven-gear power transmission route: input-double clutch 50-first input shaft 40-seven driven gear 25-second output shaft 20-differential 60-output.

8) In the eighth gear condition, the dual clutch 50 is engaged with the second input shaft 30, the fourth-eighth synchronizer 26 is engaged with the eighth driven gear 22, and the reverse bevel gear 16 is in a contracted state.

Eight-gear power transmission route: input-double clutch 50-second input shaft 30-eight driven gear 22-second output shaft 20-differential 60-output.

9) In reverse, the dual clutch 50 is engaged with the first input shaft 40 and the reversing bevel gear 16 is extended.

Reverse gear power transmission route: input-double clutch 50-first input shaft 40-first gear driven gear 14-input bevel gear 15-reverse bevel gear 16-output bevel gear 17-first output shaft 10-differential 60-output.

The transmission of the embodiment adopts eight forward gears and one reverse gear, and compared with the six-speed and seven-speed automatic transmission 100, the transmission can realize a wider speed ratio range and has higher transmission efficiency; the output torque reversing function is realized by adopting a group of bevel gears additionally arranged on the output shaft, and compared with an independent reverse gear shaft scheme, the radial space is saved; compared with the scheme of a pair of reverse gears, the axial space is saved; the bevel gear group in the invention adopts the floating reversing bevel gear 16 to realize the function of the synchronizer assembly, and compared with the scheme of the synchronizer assembly, the axial space is saved.

The present embodiment also provides, as a specific embodiment of the invention, a vehicle including the above automatic transmission 100. A vehicle using the automatic transmission 100 has eight forward gears, one reverse gear, and can realize a wider speed ratio range than six-speed and seven-speed automatic transmissions; the output torque reversing function is realized by adopting a group of bevel gears additionally arranged on the output shaft, and compared with an independent reverse gear shaft scheme, the radial space is saved; compared with the scheme of a pair of reverse gears, the axial space is saved; the bevel gear group in the invention adopts the floating reversing bevel gear 16 to realize the function of the synchronizer assembly, and compared with the scheme of the synchronizer assembly, the axial space is saved.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.