CN113931979B

CN113931979B - Speed change mechanism of vehicle and vehicle with speed change mechanism

Info

Publication number: CN113931979B
Application number: CN202010603747.1A
Authority: CN
Inventors: 刘华朝; 王逢春; 华煜; 储昭伟
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2023-06-13
Anticipated expiration: 2040-06-29
Also published as: CN113931979A

Abstract

The invention discloses a speed change mechanism of a vehicle and the vehicle with the same, wherein the speed change mechanism of the vehicle comprises: the first input shaft is connected with the engine through a first clutch; the second input shaft is connected with the engine through a second clutch, and a plurality of driving gears are arranged on the first input shaft and the second input shaft; the transmission shaft is sleeved on the first output shaft in an empty mode, and the first output shaft, the transmission shaft and the second output shaft are provided with a plurality of synchronizers and a plurality of driven gears meshed with the driving gears; the first gear of the speed change mechanism realizes power transmission through a driving gear and a driven gear which share other gears. The speed change mechanism has the advantages of low cost, small size and the like.

Description

Speed change mechanism of vehicle and vehicle with speed change mechanism

Technical Field

The invention relates to the technical field of vehicles, in particular to a speed change mechanism of a vehicle and the vehicle with the speed change mechanism.

Background

The gear shifting mechanism of the vehicle in the related art is generally provided with two clutches to improve gear shifting smoothness, the gear transmission sets can be arranged in parallel, the size of the gear shifting mechanism is reduced, a plurality of gears can be arranged on the premise of the same external size, and the power performance, economy and grade of the whole vehicle are obviously improved. However, the arrangement of the speed change structure still has the problems of high cost and large radial dimension.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a transmission mechanism for a vehicle, which has advantages of low cost, small size, and the like.

In order to achieve the above object, an embodiment according to a first aspect of the present invention proposes a transmission mechanism of a vehicle including: the first input shaft is connected with the engine through a first clutch; the second input shaft is connected with the engine through a second clutch, and a plurality of driving gears are arranged on the first input shaft and the second input shaft; the transmission shaft is sleeved on the first output shaft in an empty mode, and the first output shaft, the transmission shaft and the second output shaft are provided with a plurality of synchronizers and a plurality of driven gears meshed with the driving gears; the first gear of the speed change mechanism realizes power transmission through a driving gear and a driven gear which share other gears.

The speed change mechanism of the vehicle has the advantages of low cost, small size and the like.

According to some embodiments of the invention, the plurality of drive gears includes a second gear drive gear, a fourth gear drive gear, a sixth-eighth gear drive gear, a third-fifth gear drive gear, and a seventh gear drive gear, the second gear drive gear, the fourth gear drive gear, and the sixth-eighth gear drive gear being fixed to the first input shaft, the third-fifth gear drive gear and the seventh gear drive gear being fixed to the second input shaft; the driven gears comprise a five-gear driven gear, a seven-gear driven gear, an eight-gear driven gear, a two-gear driven gear, a three-gear driven gear, a four-gear driven gear and a six-gear driven gear, the five-gear driven gear is sleeved on the first output shaft and meshed with the three-five-gear driving gear, the seven-gear driven gear is fixed on the transmission shaft and meshed with the seven-gear driving gear, the eight-gear driven gear is sleeved on the transmission shaft and meshed with the six-eight-gear driving gear, the two-gear driven gear, the three-gear driven gear, the four-gear driven gear and the six-gear driven gear are sleeved on the second output shaft, the two-gear driven gear is meshed with the two-gear driving gear, the three-gear driven gear is meshed with the three-gear driving gear, the four-gear driven gear is meshed with the four-gear driving gear, and the six-gear driven gear is meshed with the six-eight-gear driving gear; the plurality of synchronizers comprise a fifth-seventh gear synchronizer, an eighth reverse gear synchronizer, a third-sixth gear synchronizer and a second-fourth gear synchronizer, wherein the fifth-seventh gear synchronizer is arranged on the first output shaft and positioned between the fifth-gear driven gear and the transmission shaft, the eighth reverse gear synchronizer is arranged on the transmission shaft and adjacent to the eighth-gear driven gear, the third-sixth gear synchronizer is arranged on the second output shaft and positioned between the third-gear driven gear and the sixth-gear driven gear, and the second-fourth gear synchronizer is arranged on the second output shaft and positioned between the second-gear driven gear and the fourth-gear driven gear; the first gear of the speed change mechanism realizes power transmission through the seven-gear driving gear, the seven-gear driven gear, the six-eight-gear driving gear, the eight-gear driven gear, the two-gear driving gear and the two-gear driven gear.

According to some embodiments of the invention, the second input shaft is hollow and sleeved on the first input shaft, a part of the first input shaft extends out of the second input shaft, and the second gear driving gear, the fourth gear driving gear and the sixth-eighth gear driving gear are located on the part of the first input shaft extending out of the second input shaft.

According to some embodiments of the invention, the second gear driving gear is located at an end of the first input shaft away from the engine, and the fourth gear driving gear is located between the second gear driving gear and the sixth-eighth gear driving gear;

the three-five speed drive gear is more adjacent to the engine than the seven speed drive gear.

According to some embodiments of the invention, the five-speed driven gear is located at an end of the drive shaft facing the engine.

According to some embodiments of the invention, the seven-speed driven gear is located at an end of the drive shaft adjacent to the engine, and the eight-speed driven gear is located between the seven-speed driven gear and the eight-reverse synchronizer.

According to some embodiments of the invention, the third gear driven gear is located at an end of the second output shaft adjacent to the engine, the second gear driven gear is located at an end of the second output shaft remote from the engine, the sixth gear driven gear is located between the third gear driven gear and the second gear driven gear, and the fourth gear driven gear is located between the sixth gear driven gear and the second gear driven gear.

According to some embodiments of the invention, the plurality of driven gears further comprises a reverse driven gear sleeved on the transmission shaft in a hollow mode, the reverse driven gear is meshed with the second driven gear, and the eight reverse synchronizer is located between the eight driven gear and the reverse driven gear.

According to some embodiments of the invention, the transmission mechanism of the vehicle further includes: the driving shaft is provided with a fixed driving gear, the first output shaft is provided with a fixed first output gear, the second output shaft is provided with a fixed second output gear, and the driving gear is respectively meshed with the first output gear and the second output gear.

An embodiment according to a second aspect of the invention proposes a vehicle comprising a gear change mechanism of a vehicle according to an embodiment of the first aspect of the invention.

According to the vehicle of the second aspect of the embodiment of the invention, the speed change mechanism of the vehicle has the advantages of low cost, high space utilization and the like.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic structural view of a transmission mechanism of a vehicle according to an embodiment of the present invention, with dashed lines being meshing relationship schematic lines.

Fig. 2 is a schematic view of a position of a first gear of a transmission mechanism of a vehicle according to an embodiment of the present invention, in which a broken line is a power transmission route and a chain line is a meshing relationship schematic line.

Fig. 3 is a schematic view of a position of a second gear of a transmission mechanism of a vehicle according to an embodiment of the present invention, in which a broken line is a power transmission route and a chain line is a meshing relationship schematic line.

Fig. 4 is a schematic view of the position of three gears of the transmission mechanism of the vehicle according to the embodiment of the invention, in which the broken line is a power transmission route and the chain line is a meshing relationship schematic line.

Fig. 5 is a schematic view of the position of four gears of the transmission mechanism of the vehicle according to the embodiment of the invention, in which the broken line is a power transmission route and the chain line is a meshing relationship schematic line.

Fig. 6 is a schematic view of a position of five gears of a transmission mechanism of a vehicle according to an embodiment of the present invention, in which a broken line is a power transmission route and a chain line is a meshing relationship schematic line.

Fig. 7 is a schematic view of the position of six gears of the transmission mechanism of the vehicle according to the embodiment of the invention, in which the broken line is a power transmission route and the chain line is a meshing relationship schematic line.

Fig. 8 is a schematic view of a position of seven gears of a transmission mechanism of a vehicle according to an embodiment of the present invention, in which a broken line is a power transmission route and a chain line is a meshing relationship schematic line.

Fig. 9 is a schematic view of the position of eight speeds of the transmission mechanism of the vehicle according to the embodiment of the invention, in which the broken line is a power transmission route and the chain line is a meshing relationship schematic line.

Fig. 10 is a schematic diagram of a position of a reverse gear of a transmission mechanism of a vehicle according to an embodiment of the present invention, in which a broken line is a power transmission route and a chain line is a meshing relationship schematic line.

Fig. 11 is another position schematic diagram of a reverse gear of a transmission mechanism of a vehicle according to an embodiment of the invention, in which a broken line is a power transmission route and a chain line is an engagement relationship schematic line.

Fig. 12 is a schematic structural view of a transmission mechanism of a vehicle according to another embodiment of the present invention, with dashed lines being meshing relationship schematic lines.

Reference numerals:

a speed change mechanism 1,

The first input shaft 100, the first clutch 110, the second gear driving gear 120, the fourth gear driving gear 130, the sixth eight gear driving gear 140, the sixth gear driving gear 150, the eighth gear driving gear 160,

A second input shaft 200, a second clutch 210, a three-five speed drive gear 220, a seven speed drive gear 230,

A first output shaft 300, a five-gear driven gear 310, a five-seven-gear synchronizer 320, a first output gear 330,

A transmission shaft 400, a seven-gear driven gear 410, an eight-gear driven gear 420, an eight-reverse gear synchronizer 430, a reverse gear driven gear 440,

A second output shaft 500, a second gear driven gear 510, a third gear driven gear 520, a fourth gear driven gear 530, a sixth gear driven gear 540, a third and sixth gear synchronizer 550, a second and fourth gear synchronizer 560, a second output gear 570,

Engine 600,

A drive shaft 700 and a drive gear 710.

Detailed Description

Embodiments of the present invention will be described in detail below, by way of example with reference to the accompanying drawings.

In the description of the present invention, it should be understood that the terms "center," "length," "width," "thickness," "left," "right," "axial," "radial," "circumferential," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, "plurality" means two or more.

A transmission mechanism 1 of a vehicle according to an embodiment of the present invention is described below with reference to the drawings.

As shown in fig. 1 to 11, a transmission mechanism 1 of a vehicle according to an embodiment of the present invention includes a first input shaft 100, a second input shaft 200, a first output shaft 300, a propeller shaft 400, and a second output shaft 500.

The first input shaft 100 is connected with the engine 600 through the first clutch 110, the second input shaft 200 is connected with the engine 600 through the second clutch 210, the first input shaft 100 and the second input shaft 200 are provided with a plurality of driving gears, the transmission shaft 400 is sleeved on the first output shaft 300, the transmission shaft 400 and the second output shaft 500 are provided with a plurality of synchronizers and a plurality of driven gears meshed with the driving gears, and a first gear of the speed change mechanism 1 realizes power transmission through the driving gears and the driven gears which share other gears.

According to the transmission mechanism 1 of the embodiment of the present invention, the first input shaft 100 is connected to the engine 600 through the first clutch 110, and the second input shaft 200 is connected to the engine 600 through the second clutch 210, so that two clutches are provided, and the shift power of the transmission mechanism 1 can be kept uninterrupted.

In addition, the first input shaft 100 and the second input shaft 200 are provided with a plurality of driving gears, the transmission shaft 400 is sleeved on the first output shaft 300, the transmission shaft 400 and the second output shaft 500 are provided with a plurality of synchronizers and a plurality of driven gears meshed with the plurality of driving gears, wherein the first gear of the speed change mechanism 1 realizes power transmission through the driving gears and the driven gears which share other gears. Thus, compared with the gear shifting mechanism of the vehicle in the related art, the gear shifting mechanism 1 of the vehicle in the invention can realize the first gear function through multistage transmission and repeated use of other gear gears without separately arranging the first gear driving gear and the first gear driven gear, thereby omitting the first gear driving gear and the first gear driven gear, reducing the number of the driving gear and the driven gear, reducing the overall size of the gear shifting mechanism 1 and reducing the cost.

Since the synchronizers are used in cooperation with the driven gears and/or the transmission shaft 400, the number of synchronizers can also be reduced by reducing the number of driven gears, thereby further reducing the overall size of the transmission mechanism 1 and further reducing the cost.

Thus, the speed change mechanism of the vehicle according to the embodiment of the invention has the advantages of low cost, small size and the like.

According to some embodiments of the present invention, as shown in fig. 1-11, the plurality of driving gears includes a second gear driving gear 120, a fourth gear driving gear 130, a sixth-eighth gear driving gear 140, a third-fifth gear driving gear 220, a seventh gear driving gear 230, the second gear driving gear 120, the fourth gear driving gear 130, and the sixth-eighth gear driving gear 140 are fixed to the first input shaft 100, and the third-fifth gear driving gear 220 and the seventh gear driving gear 230 are fixed to the second input shaft 200.

The driven gears include a five-gear driven gear 310, a seven-gear driven gear 410, an eight-gear driven gear 420, a two-gear driven gear 510, a three-gear driven gear 520, a four-gear driven gear 530, and a six-gear driven gear 540, the five-gear driven gear 310 is sleeved on the first output shaft 300 and meshed with the three-five-gear driving gear 220, the seven-gear driven gear 410 is fixed on the transmission shaft 400 and meshed with the seven-gear driving gear 230, the eight-gear driven gear 420 is sleeved on the transmission shaft 400 and meshed with the six-eighth-gear driving gear 410, the two-gear driven gear 510, the three-gear driven gear 520, the four-gear driven gear 530, and the six-gear driven gear 540 are sleeved on the second output shaft 500, the two-gear driven gear 510 is meshed with the two-gear driving gear 120, the three-gear driven gear 520 is meshed with the three-gear driving gear, the four-gear driven gear 530 is meshed with the four-gear driving gear 130, and the six-gear driven gear 540 is meshed with the six-eighth-gear driving gear 140.

The plurality of synchronizers include a fifth-seventh gear synchronizer 320, an eighth reverse gear synchronizer 430, a third-sixth gear synchronizer 550 and a second-fourth gear synchronizer 560, wherein the fifth-seventh gear synchronizer 320 is disposed on the first output shaft 300 and is disposed between the fifth-gear driven gear 310 and the transmission shaft 400, the eighth reverse gear synchronizer 430 is disposed on the transmission shaft 400 and is adjacent to the eighth-gear driven gear 420, the third-sixth gear synchronizer 550 is disposed on the second output shaft 500 and is disposed between the third-gear driven gear 520 and the sixth-gear driven gear 540, and the second-fourth gear synchronizer 560 is disposed on the second output shaft 500 and is disposed between the second-gear driven gear 510 and the fourth-gear driven gear 530.

For example, the fifth-seventh gear synchronizer 320 may synchronize the fifth-gear driven gear 310 with the first output shaft 300, the fifth-seventh gear synchronizer 320 may also synchronize the transmission shaft 400 with the first output shaft 300, and the fifth-seventh gear synchronizer 320 may be engaged with the transmission shaft 400 when the transmission shaft 400 and the first output shaft 300 synchronously rotate. And the central axis of the first input shaft 100 and the central axis of the second input shaft 200 may coincide with each other, the central axis of the first output shaft 300 and the central axis of the transmission shaft 400 may coincide with each other, and the central axis of the first input shaft 100, the central axis of the first output shaft 300 and the second output shaft 500 may be parallel to each other.

It will be understood by those skilled in the art that the fixed means that the relative positions of the two objects are stable, and synchronous rotation can be achieved, for example, the first input shaft 100 is provided with a fixed second gear driving gear 120, that is, the relative position between the second gear driving gear 120 and the first input shaft 100 is stable, and the second gear driving gear 120 can rotate synchronously with the first input shaft 100. The hollow sleeve means that one object is sleeved on the other object, the axial extension directions of the two objects are the same, the two objects are relatively fixed in the axial direction and the radial direction and can relatively rotate in the circumferential direction, for example, the first output shaft 300 is provided with a five-gear driven gear 310 of the hollow sleeve, that is, the five-gear driven gear 310 is sleeved on the first output shaft 300, wherein the five-gear driven gear 310 and the first output shaft 300 are relatively fixed in the radial direction and the axial direction of the first output shaft 300, and the five-gear driven gear 310 and the first output shaft 300 can relatively rotate in the circumferential direction of the first output shaft 300.

The first gear of the transmission mechanism 1 is transmitted with power by the common seven-gear driving gear 230, seven-gear driven gear 410, six-eight-gear driving gear 140, eight-gear driven gear 160, two-gear driving gear 120, and two-gear driven gear 510. As shown in fig. 2, the transmission mechanism 1 of the vehicle according to the embodiment of the invention realizes the first gear function as follows:

first, the second input shaft 200 is connected to the engine 600 through the second clutch 210, the engine 600 drives the second input shaft 200 to rotate, and the seven-gear driving gear 230 rotates synchronously with the second input shaft 200; then, the seven-gear driving gear 230 drives the transmission shaft 400 to rotate by being meshed with the seven-gear driven gear 410, and the eight-reverse gear synchronizer 430 is matched with the eight-gear driven gear 420 to realize synchronous rotation of the eight-gear driven gear 420 and the transmission shaft 400; secondly, the eight-gear driven gear 420 drives the first input shaft 100 to rotate by being meshed with the six-eight-gear driving gear 140; finally, the second-fourth gear synchronizer 560 and the second-gear driven gear 510 cooperate to realize synchronous rotation of the second-gear driven gear 510 and the second output shaft 500, the second-gear driving gear 120 and the first input shaft 100 synchronously rotate, and the second-gear driving gear 120 drives the second output shaft 500 to rotate by being meshed with the second-gear driven gear 510. In this way, the power of the engine 600 can be output by the rotation of the second output shaft 500, and the transmission mechanism 1 of the vehicle can realize the first gear function by the multistage transmission. Thus, compared with the speed change mechanism of the vehicle in the related art, the speed change mechanism 1 of the vehicle in the invention can realize the first gear function through multi-stage transmission without separately arranging the first driving gear and the first driven gear, reduces the number of gears, further reduces the size of the speed change mechanism 1 and reduces the cost.

As shown in fig. 3, the transmission mechanism 1 of the vehicle according to the embodiment of the invention realizes the second gear function as follows:

the first input shaft 100 is connected with the engine 600 through the first clutch 110, the second-fourth gear synchronizer 560 and the second-gear driven gear 510 cooperate to realize synchronous rotation of the second-gear driven gear 510 and the second output shaft 500, the second-gear driving gear 120 and the first input shaft 100 synchronously rotate, the second-gear driving gear 120 drives the second output shaft 500 to rotate by being meshed with the second-gear driven gear 510, and thus the power of the engine 600 can be output through rotation of the second output shaft 500, and the speed change mechanism 1 of the vehicle can realize a second-gear function.

As shown in fig. 4, the transmission mechanism 1 of the vehicle according to the embodiment of the invention realizes the three-gear function as follows:

the second input shaft 200 is connected with the engine 600 through the second clutch 210, the three-six gear synchronizer 550 and the three-gear driven gear 520 cooperate to realize synchronous rotation of the three-gear driven gear 520 and the second output shaft 500, the three-five gear driving gear 220 and the second input shaft 200 synchronously rotate, the three-five gear driving gear 220 is meshed with the three-gear driven gear 520 to drive the second output shaft 500 to rotate, so that the power of the engine 600 can be output through rotation of the second output shaft 500, and the speed change mechanism 1 of the vehicle can realize a three-gear function.

As shown in fig. 5, the transmission mechanism 1 of the vehicle according to the embodiment of the invention realizes the four-speed function as follows:

the first input shaft 100 is connected with the engine 600 through the first clutch 110, the second-fourth gear synchronizer 560 and the fourth-gear driven gear 530 cooperate to realize synchronous rotation of the fourth-gear driven gear 530 and the second output shaft 500, the fourth-gear driving gear 130 rotates synchronously with the first input shaft 100, the fourth-gear driving gear 130 drives the second output shaft 500 to rotate by meshing with the fourth-gear driven gear 530, and thus the power of the engine 600 can be output through rotation of the second output shaft 500, and the speed change mechanism 1 of the vehicle can realize a fourth-gear function.

As shown in fig. 6, the gear change mechanism 1 of the vehicle according to the embodiment of the invention realizes the five-gear function as follows:

the second input shaft 200 is connected with the engine 600 through the second clutch 210, the fifth-seventh gear synchronizer 320 and the fifth-seventh gear driven gear 310 cooperate to realize synchronous rotation of the fifth-gear driven gear 310 and the first output shaft 300, the three-fifth gear driving gear 220 and the first input shaft 100 synchronously rotate, the three-fifth gear driving gear 220 drives the first output shaft 300 to rotate by being meshed with the fifth-gear driven gear 310, and thus power of the engine 600 can be output through rotation of the first output shaft 300, and the speed change mechanism 1 of the vehicle can realize a fifth-gear function.

As shown in fig. 7, the transmission mechanism 1 of the vehicle according to the embodiment of the invention realizes the six-speed function as follows:

the first input shaft 100 is connected with the engine 600 through the first clutch 110, the three-six-gear synchronizer 550 and the six-gear driven gear 540 cooperate to realize synchronous rotation of the six-gear driven gear 540 and the second output shaft 500, the six-eight-gear driving gear 140 and the first input shaft 100 synchronously rotate, the six-eight-gear driving gear 140 drives the second output shaft 500 to rotate by being meshed with the six-gear driven gear 540, so that the power of the engine 600 can be output through the rotation of the second output shaft 500, and the speed change mechanism 1 of the vehicle can realize a six-gear function.

As shown in fig. 8, the transmission mechanism 1 of the vehicle according to the embodiment of the invention realizes the seven-speed function as follows:

the second input shaft 200 is connected with the engine 600 through the second clutch 210, the five-seven-gear synchronizer 320 and the transmission shaft 400 (or the seven-gear driven gear 410) cooperate to realize synchronous rotation of the seven-gear driven gear 410 and the first output shaft 300, the seven-gear driving gear 230 and the second input shaft 200 synchronously rotate, and the seven-gear driving gear 230 drives the first output shaft 300 to rotate by meshing with the seven-gear driven gear 410, so that the power of the engine 600 can be output through rotation of the first output shaft 300, and the speed change mechanism 1 of the vehicle can realize a seven-gear function.

As shown in fig. 9, the gear change mechanism 1 of the vehicle according to the embodiment of the invention realizes the eight-speed function as follows:

the first input shaft 100 is connected with the engine 600 through the first clutch 110, the fifth-seventh gear synchronizer 320 is matched with the transmission shaft 400 to realize synchronous rotation between the transmission shaft 400 and the first output shaft 300, the eighth reverse gear synchronizer 430 is matched with the eighth driven gear 420 to realize synchronous rotation of the eighth driven gear 420 and the transmission shaft 400, the sixth eighth gear driving gear 140 is synchronously rotated with the first input shaft 100, the sixth eighth gear driving gear 140 is meshed with the eighth driven gear 420 to drive the transmission shaft 400 to rotate, the first output shaft 300 is synchronously rotated with the transmission shaft 400, so that the power output of the engine 600 can be realized through the rotation of the first output shaft 300, and the speed change mechanism 1 of the vehicle can realize an eighth gear function.

By a brief description of the process of implementing each gear function of the transmission mechanism 1 of the vehicle, it is known that the transmission mechanism 1 of the vehicle can implement control and change of eight gears, thereby improving the power performance and economy of the whole vehicle. And, two keep off to eight keep off and be two-stage transmission, the transmission path is short, and efficiency is higher. As such, the transmission mechanism 1 of the vehicle according to the embodiment of the invention has advantages of low cost, small size, and the like while realizing eight gears.

In addition, as shown in fig. 12, the six-eighth gear drive gear 140 of the transmission mechanism 1 of the vehicle of the present invention may also be separately provided as a six-gear drive gear 150 and an eight-gear drive gear 160, wherein the six-gear drive gear 150 is engaged with a six-gear driven gear 540, and the eight-gear drive gear 160 is engaged with an eight-gear driven gear 420.

According to some embodiments of the present invention, as shown in fig. 1-11, the second input shaft 200 is sleeved on the first input shaft 100, that is, the second input shaft 200 is sleeved on the first input shaft 100 and the second input shaft 200 is rotatable relative to the first input shaft 100, a portion of the first input shaft 100 extends out of the second input shaft 200, and the second gear drive gear 120, the fourth gear drive gear 130 and the sixth-eighth gear drive gear 140 are located on the portion of the first input shaft 100 extending out of the second input shaft 200. In this way, the size of the transmission mechanism 1 can be further reduced.

According to some embodiments of the present invention, as shown in fig. 1-11, the five-speed driven gear 310 is located at an end of the drive shaft 400 that faces the engine 600.

Further, a seven-speed driven gear 410 is located at an end of the drive shaft 400 adjacent to the engine 600, and an eight-speed driven gear 420 is located between the seven-speed driven gear 410 and the eight-reverse synchronizer 430.

Since the transmission shaft 400 is sleeved on the first output shaft 300, the five-gear driven gear 310 is located at one end of the first output shaft 300 adjacent to the engine 600, and the seven-gear driven gear 410 and the eight-gear driven gear 420 are located at the middle of the first output shaft 300. In this way, the lower gear (the five-gear driven gear 310) is located at two ends of the first output shaft 300 on the first output shaft 300, and the higher gear (the seven-gear driven gear 410 and the eight-gear driven gear 420) is located in the middle of the first output shaft 300, and because the stress of the lower gear is larger than that of the higher gear, the acting force of the shaft is larger, so that the lower gear is arranged at the end part of the first output shaft 300, the deformation probability of the first output shaft 300 is reduced, and the service life of the first output shaft 300 is prolonged.

According to some embodiments of the present invention, as shown in fig. 1-11, the second gear drive gear 120 is located at an end of the first input shaft 100 remote from the engine 600, and the fourth gear drive gear 130 is located between the second gear drive gear 120 and the sixth-eighth gear drive gear 140.

Further, the three-five speed drive gear 220 is more adjacent to the engine 600 than the seven speed drive gear 230.

Thus, each driving gear is more convenient to be matched with the corresponding driven gear, the layout mode is more reasonable, the three-five-gear driving gear 220 can be respectively matched with the three-gear driven gear 520 and the five-gear driven gear, and the size of the speed change mechanism 1 is reduced. And the driving gears with smaller gears are arranged at the two ends of the first input shaft 100 on the input shaft, and the driving gears with larger gears are arranged in the middle of the first input shaft 100, and because the stress of the low gears is larger than that of the high gears, the acting force of the shaft is larger, so that the low gears are arranged at the end parts of the first input shaft 100, the deformation probability of the first input shaft 100 is reduced, and the service life of the first input shaft 100 is prolonged.

According to some embodiments of the present invention, as shown in fig. 1-11, the third-gear driven gear 520 is located at an end of the second output shaft 500 adjacent to the engine 600, the second-gear driven gear 510 is located at an end of the second output shaft 500 remote from the engine 600, the sixth-gear driven gear 540 is located between the third-gear driven gear 520 and the second-gear driven gear 510, and the fourth-gear driven gear 530 is located between the sixth-gear driven gear 540 and the second-gear driven gear 510. In this way, the lower gear (the third gear driven gear 520 and the second gear driven gear 510) is located at two ends of the second output shaft 500, and the higher gear (the fourth gear driven gear 530 and the sixth gear driven gear 540) is located in the middle of the second output shaft 500, and the lower gear is stressed relatively higher than the higher gear, so that the acting force of the shaft is relatively higher, and the lower gear is located at two ends of the second output shaft 500, so that the deformation probability of the second output shaft 500 is reduced, and the service life of the second output shaft 500 is prolonged.

According to some embodiments of the present invention, as shown in fig. 1-11, the plurality of driven gears further includes a reverse driven gear 440 that is idle around the transmission shaft 400, and the eight reverse synchronizer 430 is located between the eight driven gear 420 and the reverse driven gear 440, and the reverse driven gear 440 is meshed with the two driven gears 510. In this way, the transmission mechanism 1 of the vehicle can have the reverse gear.

The related art transmission mechanism needs to separately provide a reverse gear shaft to support a reverse driven gear, and also needs to separately provide a synchronizer for the reverse driven gear.

The speed change mechanism 1 of the invention has the reverse driven gear arranged on the transmission shaft 400, and a reverse shaft and a synchronizer which is independently matched with the reverse driven gear 440 can be omitted, thereby reducing the size and the cost of the speed change mechanism 1 of the vehicle.

The transmission mechanism 1 of the vehicle according to the embodiment of the present invention has two processes of realizing the reverse function:

for example, as shown in fig. 10, the first input shaft 100 is connected to the engine 600 through the first clutch 110, the fifth-seventh gear synchronizer 320 cooperates with the transmission shaft 400 to realize synchronous rotation between the transmission shaft 400 and the first output shaft 300, the eighth reverse gear synchronizer 430 cooperates with the reverse gear driven gear 440 to realize synchronous rotation of the reverse gear driven gear 440 and the transmission shaft 400, the second gear driving gear 120 of the first input shaft 100 drives the second gear driven gear 510 to rotate, and the second gear driven gear 510 drives the reverse gear driven gear 440, the transmission shaft 400 and the first output shaft 300 to rotate, so that the power output of the engine 600 can be output through the rotation of the first output shaft 300, and the transmission mechanism 1 of the vehicle realizes the reverse gear function.

For another example, as shown in fig. 11, the first input shaft 100 is connected to the engine 600 through the first clutch 110, the three-six gear synchronizer 550 cooperates with the three-gear driven gear 520 to realize synchronous rotation between the three-gear driven gear 520 and the second output shaft 500, the eight-reverse gear synchronizer 430 cooperates with the reverse gear driven gear 440 to realize synchronous rotation of the reverse gear driven gear 440 and the transmission shaft 400, the second gear driving gear 120 of the first input shaft 100 drives the second gear driven gear 510 to rotate, the second gear driven gear 510 drives the reverse gear driven gear 440 and the transmission shaft 400 to rotate, the seven-gear driven gear 410 on the transmission shaft 400 synchronously rotates with the transmission shaft 400, then the seven-gear driven gear 410 drives the second input shaft 200 to rotate by meshing with the seven-gear driving gear 230, the three-gear driving gear on the second input shaft 200 synchronously rotates with the second input shaft 200, and the three-gear driving gear drives the second output shaft 500 to rotate by meshing with the three-gear driven gear 520, so that the power of the engine 600 can be output through rotation of the second output shaft 500, and the transmission mechanism 1 of the vehicle realizes a reverse gear function.

Therefore, the transmission mechanism 1 of the vehicle has more than one setting for realizing the reverse gear function, when the transmission mechanism is practically applied to the vehicle, a proper mode for realizing the reverse gear function can be selected according to the parameters of the vehicle, and the cotton-padded mattress improves the universality of the transmission mechanism 1 and can also improve the performance of the vehicle.

The following table is a schematic diagram of the positions of the synchronizers in each gear of the transmission mechanism 1, wherein the synchronizer a is a five-seven-gear synchronizer 320, the synchronizer b is an eight-reverse gear synchronizer 430, the synchronizer c is a three-six-gear synchronizer 550, the synchronizer d is a two-four-gear synchronizer 560, the synchronizer L is matched with the left side gear, the synchronizer R is matched with the right side gear, the synchronizer N is not matched with the gear, the ∈ is the state of the two clutches and each synchronizer in the current gear, and the reverse gear 1 and the reverse gear 2 are two ways of realizing the reverse gear function.

According to some embodiments of the present invention, as shown in fig. 1-11, the transmission 1 of the vehicle further includes a driving shaft 700, the driving shaft 700 is provided with a fixed driving gear 710, the first output shaft 300 is provided with a fixed first output gear 330, the second output shaft 500 is provided with a fixed second output gear 570, and the driving gear 710 is engaged with the first output gear 330 and the second output gear 570, respectively. Wherein the drive shaft 700 is provided with a fixed differential, and the drive gear 710 is fixedly provided to the housing of the differential. Thus, the engine 600 can drive the input shaft, then the input shaft is matched with the output shaft, then the power is transmitted to the driving shaft 700 through the output shaft, and the driving shaft 700 is driven to rotate by the output shaft through the arrangement of the gear pair, so that the operation is easy, and the transmission efficiency of the speed change mechanism 1 of the vehicle is high.

A vehicle according to an embodiment of the invention, which includes a transmission mechanism 1 of a vehicle according to an embodiment of the invention, is described below with reference to the drawings.

According to the vehicle of the embodiment of the invention, the eight gears are realized through the speed change mechanism 1 of the vehicle of the embodiment of the invention, and meanwhile, the vehicle has the advantages of low cost, high space utilization rate and the like.

Other constructions and operations of the transmission mechanism 1 of the vehicle according to the embodiment of the present invention are known to those skilled in the art, and will not be described in detail herein.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A transmission mechanism of a vehicle, characterized by comprising:

the first input shaft is connected with the engine through a first clutch;

the second input shaft is connected with the engine through a second clutch, and a plurality of driving gears are arranged on the first input shaft and the second input shaft;

the transmission shaft is sleeved on the first output shaft in an empty mode, and the first output shaft, the transmission shaft and the second output shaft are provided with a plurality of synchronizers and a plurality of driven gears meshed with the driving gears;

the first gear of the speed change mechanism realizes power transmission through a driving gear and a driven gear which share other gears;

the driving gears comprise a second-gear driving gear, a sixth-eighth-gear driving gear and a seventh-gear driving gear, the second-gear driving gear and the sixth-eighth-gear driving gear are fixed on the first input shaft, and the seventh-gear driving gear is fixed on the second input shaft;

the driven gears comprise a second-gear driven gear, a sixth-gear driven gear, a seventh-gear driven gear and an eighth-gear driven gear, the seventh-gear driven gear is fixed on the transmission shaft and meshed with the seventh-gear driving gear, the eighth-gear driven gear is sleeved on the transmission shaft in a hollow manner and meshed with the sixth-eighth-gear driving gear, the second-gear driven gear and the sixth-gear driven gear are sleeved on the second output shaft in a hollow manner, the second-gear driven gear is meshed with the second-gear driving gear, and the sixth-gear driven gear is meshed with the sixth-eighth-gear driving gear;

the first gear of the speed change mechanism realizes power transmission through the seven-gear driving gear, the seven-gear driven gear, the six-eight-gear driving gear, the eight-gear driven gear, the two-gear driving gear and the two-gear driven gear.

2. The transmission mechanism of a vehicle according to claim 1, characterized in that the plurality of drive gears includes a four-speed drive gear fixed to the first input shaft, a three-five-speed drive gear fixed to the second input shaft;

the driven gears comprise a five-gear driven gear, a three-gear driven gear and a four-gear driven gear, the five-gear driven gear is sleeved on the first output shaft in an empty mode and meshed with the three-five-gear driving gear, the three-gear driven gear and the four-gear driven gear are sleeved on the second output shaft in an empty mode, the three-gear driven gear is meshed with the three-five-gear driving gear, and the four-gear driven gear is meshed with the four-gear driving gear;

the plurality of synchronizers comprise a fifth gear synchronizer, a seventh gear synchronizer, an eighth reverse gear synchronizer, a third gear synchronizer, a sixth gear synchronizer and a second gear synchronizer, wherein the fifth gear synchronizer, the seventh gear synchronizer is arranged on the first output shaft and is positioned between the fifth gear driven gear and the transmission shaft, the eighth reverse gear synchronizer is arranged on the transmission shaft and is adjacent to the eighth gear driven gear, the third gear synchronizer, the sixth gear synchronizer is arranged on the second output shaft and is positioned between the third gear driven gear and the sixth gear driven gear, and the second gear synchronizer, the fourth gear synchronizer and the second output shaft are positioned between the second gear driven gear and the fourth gear driven gear.

3. The transmission mechanism of a vehicle according to claim 2, wherein the second input shaft is blank from the first input shaft, a portion of the first input shaft extends out of the second input shaft, and the second gear drive gear, the fourth gear drive gear, and the sixth-eighth gear drive gear are located on a portion of the first input shaft that extends out of the second input shaft.

4. The transmission mechanism of the vehicle according to claim 2, characterized in that the second-gear drive gear is located at an end of the first input shaft remote from the engine, and the fourth-gear drive gear is located between the second-gear drive gear and the sixth-eighth-gear drive gear;

5. The vehicle transmission mechanism according to claim 2, wherein the five-speed driven gear is located at an end of the propeller shaft that faces the engine.

6. The vehicle transmission mechanism according to claim 2, wherein the seven-speed driven gear is located at an end of the propeller shaft adjacent to the engine, and the eight-speed driven gear is located between the seven-speed driven gear and the eight-reverse synchronizer.

7. The transmission mechanism of a vehicle according to claim 2, characterized in that the three-speed driven gear is located at an end of the second output shaft adjacent to the engine, the two-speed driven gear is located at an end of the second output shaft remote from the engine, the six-speed driven gear is located between the three-speed driven gear and the two-speed driven gear, and the four-speed driven gear is located between the six-speed driven gear and the two-speed driven gear.

8. The transmission mechanism of a vehicle according to claim 2, wherein the plurality of driven gears further includes a reverse driven gear that is blank around the propeller shaft, the reverse driven gear and the second driven gear are engaged, and the eighth reverse synchronizer is located between the eighth driven gear and the reverse driven gear.

9. The transmission mechanism of a vehicle according to any one of claims 1 to 7, characterized by further comprising:

the driving shaft is provided with a fixed driving gear, the first output shaft is provided with a fixed first output gear, the second output shaft is provided with a fixed second output gear, and the driving gear is respectively meshed with the first output gear and the second output gear.

10. A vehicle characterized by comprising a gear change mechanism of a vehicle according to any one of claims 1-9.