CN113883238A

CN113883238A - Transmission and vehicle

Info

Publication number: CN113883238A
Application number: CN202010632320.4A
Authority: CN
Inventors: 刘华朝; 华煜; 王逢春; 吴浪; 周韬
Original assignee: BYD Co Ltd; Huizhou BYD Battery Co Ltd
Current assignee: BYD Co Ltd; Huizhou BYD Battery Co Ltd
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2022-01-04
Anticipated expiration: 2040-07-03
Also published as: CN113883238B

Abstract

The invention discloses a transmission and a vehicle, the transmission includes: first output shaft and shift fork device are provided with first fender position driven gear, second fender position driven gear, first semi-synchronous ware, second semi-synchronous ware and fixed axle on the first output shaft at least, and the fixed axle cover is established on first output shaft, and first fender position driven gear overlaps and establishes on the fixed axle, and second fender position driven gear overlaps and establishes on first output shaft, and the shift fork device includes: the fork lever, first fork foot and second fork foot, first fork foot cooperatees with first semi-synchronizer and second fork foot cooperatees with second semi-synchronizer. When the first half synchronizer needs to be combined with the first gear driven gear or the second half synchronizer needs to be combined with the second gear driven gear, the first half synchronizer and the second half synchronizer are controlled by one shifting fork rod to move through synchronous gear sleeves, and therefore combination can be achieved.

Description

Transmission and vehicle

Technical Field

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

Background

A transmission is a mechanism for changing the speed and torque from an engine, which can be fixed or geared to change the ratio of the output shaft to the input shaft, also known as a gearbox. The speed variator consists of speed-changing transmission mechanism and control mechanism, and some vehicles also have power output mechanism. The transmission mechanism is mainly driven by common gears and also driven by planetary gears. The common gear transmission mechanism generally uses a sliding gear, a synchronizer and the like.

In the related art, the gears of the transmission are generally arranged more, the number of corresponding gears is increased, the number of used synchronizers is more, the number of gear shifting execution mechanisms is increased, and the cost of the transmission is higher.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a transmission, which uses one shift rod to control synchronous movement of synchronous gear sleeves on a first half synchronizer and a second half synchronizer, so that the two synchronizers can be controlled by using one shift rod, and the transmission has simple structure and low cost.

The invention also provides a vehicle.

According to a transmission, a first output shaft and a shifting fork device of an embodiment of the first aspect of the present invention, the first output shaft is provided with at least a first gear driven gear, a second gear driven gear, a first semi-synchronizer, a second semi-synchronizer and a fixed shaft, the fixed shaft is sleeved on the first output shaft, the first gear driven gear is sleeved on the fixed shaft, the first semi-synchronizer is fixed on the fixed shaft and is used for selectively combining the first gear driven gear, the second gear driven gear is sleeved on the first output shaft, the second semi-synchronizer is fixed on the first output shaft and is used for selectively combining the second gear driven gear, the shifting fork device includes: the fork lever comprises a fork lever body, a first fork foot and a second fork foot, wherein the first fork foot and the second fork foot are arranged on the fork lever body and are arranged at intervals in the length direction of the fork lever body, the first fork foot is matched with the first synchronizer, and the second fork foot is matched with the second synchronizer.

According to the transmission provided by the embodiment of the invention, when the first half synchronizer needs to be combined with the first gear driven gear or the second half synchronizer needs to be combined with the second gear driven gear, the first half synchronizer and the second half synchronizer are controlled by one shifting fork rod to synchronously move, so that the combination can be realized, and the arrangement reduces a gear shifting actuating mechanism and a corresponding hydraulic driving device, and has the advantages of simple structure and low cost.

According to some embodiments of the invention, the first gear driven gear and the second gear driven gear are two gear driven gears axially adjacently arranged, and the first half synchronizer and the second half synchronizer are two synchronizers axially adjacently arranged and located between the first gear driven gear and the second gear driven gear.

According to some embodiments of the invention, a side of the first gear driven gear facing the first half-synchronizer and a side of the second gear driven gear facing the second half-synchronizer are both provided with coupling teeth, and the first half-synchronizer and the second half-synchronizer each comprise: synchronous hub, synchronizer ring and synchronous tooth cover, the synchronizer ring only set up in the one side of synchronous hub towards the fender position driven gear that corresponds, with correspond the combination tooth combines together, synchronous tooth cover is located on the synchronous hub.

According to some embodiments of the invention, the fork arrangement further comprises: the first connecting rod and the second connecting rod are arranged in the length direction of the shifting fork rod at intervals, and the first shifting fork foot is connected with the first connecting rod and the second shifting fork foot is connected with the second connecting rod.

According to some embodiments of the invention, comprising: the first input shaft is provided with at least a second-gear driving gear and a highest-gear driving gear, the second input shaft is provided with at least a second-highest-gear driving gear, the first output shaft is provided with at least a second-highest-gear driven gear and a highest-gear driven gear which are selectively combined, the second-highest-gear driven gear is meshed with the second-highest-gear driving gear, the highest-gear driven gear is meshed with the highest-gear driving gear, the second-highest-gear driven gear and the highest-gear driven gear are also selectively combined, the second output shaft is provided with at least a second-gear driven gear which is selectively combined, the second-gear driven gear is meshed with the second-gear driving gear, wherein when the second-highest-gear driven gear is combined with the highest-gear driven gear and the second output shaft is combined with the second output shaft, the second highest gear driving gear, the second highest gear driven gear, the highest gear driving gear, the first input shaft, the second gear driving gear, the second gear driven gear and the second output shaft form a power transmission path corresponding to a first gear.

According to some embodiments of the invention, the second highest driven gear is fixed to the fixed shaft, the highest driven gear is the first highest driven gear, and the highest driven gear is located between the second highest driven gear and the first half synchronizer.

According to some embodiments of the invention, the first output shaft further has a first synchronizer fixed thereto and provided with a selectively engageable third gear driven gear, the first synchronizer being provided between the third gear driven gear and the next highest gear driven gear to selectively engage the third gear driven gear and the first output shaft and to selectively engage the next highest gear driven gear and the first output shaft.

According to some embodiments of the invention, the third driven gear is further coaxially provided with an idler gear, the second output shaft is further provided with a selectively engageable reverse gear, the reverse gear is in mesh with the idler gear, and the second output shaft is provided with a second synchronizer for engaging the reverse gear.

According to some embodiments of the invention, a fourth gear driven gear and a fifth gear driven gear which are selectively combined are provided on the second output shaft, a second highest gear driving gear which is engaged with the second highest gear driven gear is provided on the second input shaft, and the fourth gear driven gear and the second highest gear driven gear share the second highest gear driving gear; the first input shaft is provided with a highest gear driving gear meshed with the highest gear driven gear, and the fifth gear driven gear and the highest gear driven gear share the highest gear driving gear.

According to some embodiments of the present invention, the second output shaft is fixedly provided with a second synchronizer and a third synchronizer and is provided with a selectively engaged reverse gear, the second synchronizer is provided between the fourth gear driven gear and the reverse gear to selectively engage the fourth gear driven gear and the second output shaft and to selectively engage the reverse gear and the second output shaft, and the third synchronizer is provided between the second gear driven gear and the fifth gear driven gear to selectively engage the second gear driven gear and the second output shaft and to selectively engage the fifth gear driven gear and the second output shaft.

According to some embodiments of the invention, a common projected area of the first synchronizer half and the second synchronizer half in a horizontal plane and a projected area of the secondary driven gear in the horizontal plane have an axial coinciding area.

A vehicle according to an embodiment of the second aspect of the invention includes the transmission.

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 above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural view of a fork device according to an embodiment of the present invention;

FIG. 2 is a partial schematic view A of FIG. 1;

FIG. 3 is a cross-sectional view of a first embodiment of a transmission according to an embodiment of the present invention;

FIG. 4 is a first gear drive path of a first embodiment of the transmission of the present invention;

FIG. 5 is a second gear path of a first embodiment of the transmission of the present invention;

FIG. 6 is a third gear drive path of a first embodiment of the transmission of the present invention;

FIG. 7 is a fourth gear drive path of a first embodiment of the transmission of the present invention;

FIG. 8 is a fifth gear drive path of a first embodiment of the transmission of the present invention;

FIG. 9 is a six speed drive path of an embodiment one of the transmissions of the present invention;

FIG. 10 is a seven speed drive path of embodiment one of the transmission of the present invention;

FIG. 11 is an eight speed drive path of the first embodiment of the transmission of the present invention;

FIG. 12 is a reverse gear drive path of a first embodiment of the transmission of the present invention;

FIG. 13 is a diagrammatic view of a second embodiment of a transmission according to an embodiment of the present invention.

Reference numerals:

a first input shaft 12; a second input shaft 11; a first output shaft 13; a second output shaft 14; an engine 15; a clutch 16;

a second gear driving gear 2 a; a second driven gear 2 b; a third-gear drive gear 3 a; a third-gear driven gear 3 b; a fourth gear drive gear 4 a; a fourth-gear driven gear 4 b; a fifth gear drive gear 5 a; a fifth-gear driven gear 5 b; a sixth-gear drive gear 6 a; a six-speed driven gear 6 b; a seven-speed driven gear 7 b; an eight-speed driven gear 8 b; a parking gear P;

a first output shaft output gear 9 a; a second output shaft output gear 9 c; a main reducer driven gear 9 b;

idler gear r 1; a reverse gear r 2;

a first half synchronizer 20 b; a second half-synchronizer 20 a; a first synchronizer 21; a second synchronizer 22; a third synchronizer 23;

a fork shifter device 30; a fork lever 31; a first fork foot 32; a second fork foot 33;

a synchronizer hub 41; the synchronizer ring 42; a synchronizing sleeve gear 43; a first link 44; a second link 45; the coupling teeth 46;

a first-gear driven gear 51; a second-gear driven gear 52; the shaft 53 is fixed.

Detailed Description

Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.

A transmission according to an embodiment of the present invention, which can also be used on a vehicle, will be described below with reference to fig. 1 to 13.

As shown in fig. 1 to 4, the transmission includes: the first output shaft 13 is at least provided with a first gear driven gear 51, a second gear driven gear 52, a first half synchronizer 20b, a second half synchronizer 20a and a fixed shaft 53, the fixed shaft 53 is sleeved on the first output shaft 13, the first gear driven gear 51 is sleeved on the fixed shaft 53, the first half synchronizer 20b is fixed on the fixed shaft 53, the first half synchronizer 20b is used for selectively combining the first gear driven gear 51, the second gear driven gear 52 is sleeved on the first output shaft 13, the second half synchronizer 20a is fixed on the first output shaft 13, and the second half synchronizer 20a is used for selectively combining the second gear driven gear 52. When the first gear driven gear 51 is sleeved on the fixed shaft 53, the first half synchronizer 20b is engaged with the first gear driven gear 51, so that the first gear driven gear 51 and the fixed shaft 53 can rotate together.

The fork device 30 includes: the fork lever 31, first fork foot 32 and second fork foot 33 all set up in fork lever 31 to first fork foot 32 and second fork foot 33 set up at the length direction interval of fork lever 31, and first fork foot 32 cooperatees with first semi-synchronizer 20b, and second fork foot 33 cooperatees with second semi-synchronizer 20 a.

That is, the first fork leg 32 is engaged with the first half synchronizer 20b, the second fork leg 33 is engaged with the second half synchronizer 20a, and the first fork leg 32 and the second fork leg 33 are controlled by one fork lever 31. When the shift fork 31 is moving towards the first gear driven gear 51, the first half synchronizer 20b is brought into engagement with the first gear driven gear 51, and the second half synchronizer 20a is moved away from the second gear driven gear 52. When the fork 31 is moving toward the second-gear driven gear 52, the second half synchronizer 20a is brought into engagement with the second-gear driven gear 52, and the first half synchronizer 20b is moved away from the first-gear driven gear 51.

Therefore, when the first half synchronizer 20b needs to be combined with the first gear driven gear 51 or the second half synchronizer 20a needs to be combined with the second gear driven gear 52, the first half synchronizer 20b and the synchronous gear sleeve 43 on the second half synchronizer 20a are controlled to synchronously move through one shifting fork rod 31, and the combination can be realized.

The first gear driven gear 51 and the second gear driven gear 52 are two gear driven gears which are axially adjacent to each other, and the first half synchronizer 20b and the second half synchronizer 20a are two half synchronizers which are axially adjacent to each other and are located between the first gear driven gear 51 and the second gear driven gear 52. That is, the first half synchronizer 20b and the second half synchronizer 20a are located between the first gear driven gear 51 and the second gear driven gear 52, and no other synchronizer or gear is located between the first half synchronizer 20b and the second half synchronizer 20a, so that the first gear driven gear 51, the first half synchronizer 20b, the second half synchronizer 20a and the second gear driven gear 52 are sequentially arranged at intervals in the left-to-right direction or the right-to-left direction, which can ensure that the first half synchronizer 20b is successfully combined with the first gear driven gear 51 and the second half synchronizer 20a is successfully combined with the second gear driven gear 52.

As shown in fig. 1 and 2, the first gear driven gear 51 on the side facing the first half synchronizer 20b and the second gear driven gear 52 on the side facing the second half synchronizer 20a are each provided with a coupling tooth 46, and each of the first half synchronizer 20b and the second half synchronizer 20a includes: a synchronizer hub 41, a synchronizer ring 42 and a synchronizer sleeve 43, the synchronizer ring 42 is only arranged on one side of the synchronizer hub 41 facing to the corresponding gear driven gear to be combined with the corresponding combination tooth 46, and the synchronizer sleeve 43 is sleeved on the synchronizer hub 41. That is, the first and second half-

synchronizers

20b and 20a are provided with the synchronizer ring 42 only on one side, so that the synchronizer ring 42 on the other side can be omitted, and the production cost of the first and second half-

synchronizers

20b and 20a can be reduced. When the synchronizer ring 42 is engaged with the corresponding engaging tooth 46, it is possible to achieve the synchronous rotation of the first half synchronizer 20b with the first-gear driven gear 51, or the synchronous rotation of the second half synchronizer 20a with the second-gear driven gear 52.

As shown in fig. 1, the fork device 30 further includes: the first link 44 and the second link 45 are provided at intervals in the longitudinal direction of the fork lever 31, the first fork leg 32 is connected to the first link 44, and the second fork leg 33 is connected to the second link 45. The first connecting rod 44 and the second connecting rod 45 can separate the shifting fork rod 31 from the first half synchronizer 20b and the second half synchronizer 20a, so that the gear driven gear on the first output shaft 13 cannot interfere with the shifting fork rod 31, and the normal use of the transmission is ensured.

According to one embodiment of the present invention, as shown in fig. 3 and 4, a transmission includes: the first input shaft 12 is at least provided with a second gear driving gear 2a and a highest gear driving gear, the second input shaft 11 is at least provided with a second highest gear driving gear, the first output shaft 13 is at least provided with a second highest gear driven gear which is selectively combined with the first highest gear driven gear, the second highest gear driven gear is meshed with the second highest gear driving gear, the second highest gear driven gear is meshed with the highest gear driving gear, the second highest gear driven gear is further selectively combined with the highest gear driven gear, the second output shaft 14 is at least provided with a second gear driven gear 2b which is selectively combined with the second gear driving gear 2a, and the second gear driven gear 2b is meshed with the second gear driving gear 2 a. It should be noted that one of the next highest gear driven gear and the highest gear driven gear may be the first gear driven gear 51, and the first gear driven gear 51 and the second gear driven gear 52 may be formed by other gear driven gears on the first output shaft 13, which is not limited in detail.

When the second highest-gear driven gear is combined with the highest-gear driven gear and the second-gear driven gear 2b is combined with the second output shaft 14, the second input shaft 11, the second highest-gear driving gear, the second highest-gear driven gear, the highest-gear driving gear, the first input shaft 12, the second-gear driving gear 2a, the second-gear driven gear 2b and the second output shaft 14 form a power transmission path corresponding to a first gear. Like this, realize the transmission route of a fender through the combination of inferior high gear driving gear, inferior high gear driven gear, highest gear driving gear, first input shaft 12, two fender driving gears 2a, two fender driven gears 2b and second output shaft 14, reuse the gear like this, can omit a fender gear wheel to can reduce the cost of derailleur.

Therefore, the second input shaft 11, the second highest gear driving gear, the second highest gear driven gear, the highest gear driving gear, the first input shaft 12, the second gear driving gear 2a, the second gear driven gear 2b and the second output shaft 14 are arranged to replace a power transmission path corresponding to a first gear, so that the transmission does not need to be provided with the first gear driven gear and the first gear driving gear, and the production cost of the transmission can be reduced. In the related art, at least 4 synchronizers and one semi-synchronizer are required for realizing 8 gears and one reverse gear, so that at least 5 sets of gear shifting execution mechanisms and corresponding hydraulic driving devices are required.

The first embodiment of the present invention is described below with reference to fig. 4 to 12.

To describe the embodiment of the present invention in detail, the present application exemplifies a transmission having eight forward gears, i.e., the highest gear is eight gears.

Specifically, the first-gear driven gear is the highest-gear driven gear, and is also the eight-gear driven gear 8 b. The second gear driven gear is a fourth gear driven gear 4b, the third gear driven gear is a third gear driven gear 3b, the fourth gear driven gear is a fifth gear driven gear 5b, and the fifth gear driven gear is a sixth gear driven gear 6 b.

Therefore, a fixed shaft 53 is connected between the seven-gear driven gear 7b and the first half synchronizer 20b, the fixed shaft 53 is sleeved on the first output shaft 13, the eight-gear driven gear 8b is sleeved on the fixed shaft 53, the eight-gear driven gear 8b is located between the seven-gear driven gear 7b and the first half synchronizer 20b, and the first half synchronizer 20b is used for combining the seven-gear driven gear 7b and the eight-gear driven gear 8 b. That is, the right side of the first half synchronizer 20b is provided with the eight-gear driven gear 8b, the left side of the second half synchronizer 20a is provided with the four-gear driven gear 4b, and no gear driven gear or synchronizer is arranged between the first half synchronizer 20b and the second half synchronizer 20a, so that the normal use of the first half synchronizer 20b and the second half synchronizer 20a is prevented from being influenced.

As shown in fig. 4, the second synchronizer half 20a is fixed to the first output shaft 13, the fourth-speed driven gear 4b is further provided on the first output shaft 13, and the second synchronizer half 20a is used for combining the fourth-speed driven gear 4b and the first output shaft 13. As such, the first and second half-

synchronizers

20b and 20a are disposed between the fourth-speed driven gear 4b and the eighth-speed driven gear 8 b. The four-gear driven gear 4b can be independently combined with the second half synchronizer 20a, and the eight-gear driven gear 8b can be independently combined with the eight-gear driven gear 8b, so that the shifting fork device 30 can be conveniently operated to shift gears.

Further, a first synchronizer 21 is fixed to the first output shaft 13, and the first output shaft 13 is provided with a third-speed driven gear 3b selectively coupled, and the first synchronizer 21 is provided between the third-speed driven gear 3b and the seventh-speed driven gear 7b to selectively couple the third-speed driven gear 3b and the first output shaft 13, and to selectively couple the seventh-speed driven gear 7b and the first output shaft 13. By providing the first synchronizer 21 coaxially fixed to the first output shaft 13, the seventh-speed driven gear 7b is provided on the left side of the first synchronizer 21, and the third-speed driven gear 3b is provided on the right side of the first synchronizer 21. Wherein, when the first synchronizer 21 is engaged with the seven speed driven gear 7b, the co-rotation between the seven speed driven gear 7b and the first output shaft 13 can be realized. When the first synchronizer 21 is combined with the third-speed driven gear 3b, the joint rotation between the third-speed driven gear 3b and the first output shaft 13 can be achieved. That is, the first synchronizer 21 is a shared synchronizer shared by the seven-speed driven gear 7b and the three-speed driven gear 3b, so that the number of synchronizers can be reduced, the cost of the transmission can be reduced, and the axial size of the transmission can be reduced.

As shown in fig. 4, the third driven gear 3b is further coaxially provided with an idler gear r1, the third driven gear 3b and the idler gear r1 may be duplicate gears, the second output shaft 14 is further provided with a selectively engaged reverse gear r2, the reverse gear r2 is engaged with the idler gear r1, and the second output shaft 14 is provided with a second synchronizer 22 for engaging the reverse gear r 2. The third driven gear 3b is fixed coaxially with the idler gear r 1. As such, when the first synchronizer 21 is engaged with the third driven gear 3b, the power of the first output shaft 13 can be transmitted to the idler gear r1, and the idler gear r1 is engaged with the reverse gear r2 to transmit the power to the reverse gear r 2. The reverse gear r2 thus provided allows the transmission to omit the reverse shaft, and allows the size and cost of the transmission to be reduced.

As shown in fig. 4, the second output shaft 14 is provided with a fifth-speed driven gear 5b and a sixth-speed driven gear 6b that are selectively engaged with each other, the fifth-speed driven gear 5b is engaged with the seventh-speed drive gear, and the sixth-speed driven gear 6b is engaged with the eighth-speed drive gear. That is, the fifth-speed driven gear 5b and the seventh-speed driven gear 7b share the seventh-speed drive gear, or share the fifth-speed drive gear 5 a. The six-speed driven gear 6b and the eight-speed driven gear 8b share an eight-speed drive gear, or share a six-speed drive gear 6 a. Through two fender position sharing driving gear, can reduce the quantity of driving gear, can further reduce the axial dimensions of first input shaft 12 and second input shaft 11, can make things convenient for first input shaft 12 and second input shaft 11 cover to establish the setting, can be so that the derailleur structure is compacter reliable.

The second output shaft 14 is fixedly provided with a second synchronizer 22 and a third synchronizer 23, and the second synchronizer 22 is provided between the fifth-speed driven gear 5b and the reverse gear r2 to selectively engage the fifth-speed driven gear 5b and the second output shaft 14, and to selectively engage the reverse gear r2 and the second output shaft 14. When the left side of the second synchronizer 22 is engaged with the fifth-speed driven gear 5b, the fifth-speed driven gear 5b rotates together with the second output shaft 14. When the second synchronizer 22 is engaged with the reverse gear r2 on the right side, the reverse gear r2 rotates together with the second output shaft 14.

Also, a third synchronizer 23 is provided between the second-gear driven gear 2b and the sixth-gear driven gear 6b to selectively couple the second-gear driven gear 2b and the second output shaft 14, and to selectively couple the sixth-gear driven gear 6b and the second output shaft 14. That is, when the left side of the third synchronizer 23 is engaged with the second-stage driven gear 2b, the second-stage driven gear 2b rotates together with the second output shaft 14. When the right side of the third synchronizer 23 is engaged with the sixth-speed driven gear 6b, the sixth-speed driven gear 6b rotates together with the second output shaft 14. The second synchronizer 22 and the third synchronizer 23 are both synchronizers common to two gears, which can reduce the axial size of the second output shaft 14, thereby reducing the axial size of the transmission and reducing the cost of the transmission.

As shown in fig. 4 to 12, a parking gear P is further provided on the second output shaft 14, and the parking gear P can ensure that the vehicle does not roll when the vehicle stops running. Specifically, the parking range gear P is disposed on the left side of the secondary driven gear 2 b.

The power transmission route according to the first embodiment of the invention will be described in further detail below.

The first input shaft 12 is responsible for input of second, fourth, sixth and eighth gears, and the second input shaft 11 is responsible for input of third, fifth, seventh and reverse gears. That is, the fourth-gear drive gear 4a, the second-gear drive gear 2a, the sixth-gear drive gear 6a, the fifth-gear drive gear 5a, and the third-gear drive gear 3a are provided in this order from the left to the right.

The first input shaft 12 is provided with a second gear drive gear 2a, a fourth gear drive gear 4a, and a sixth gear drive gear 6a, and the second input shaft 11 is provided with a third gear drive gear 3a and a fifth gear drive gear 5 a. The first output shaft 13 is provided with a fourth-gear driven gear 4b, an eighth-gear driven gear 8b, a seventh-gear driven gear 7b, and a third-gear driven gear 3b, and the second output shaft 14 is provided with a second-gear driven gear 2b, a fifth-gear driven gear 5b, and a sixth-gear driven gear 6 b. The first output shaft 13 is provided with an idler gear r1, an idler gear r1 is fixed coaxially with the third driven gear 3b, and the second output shaft 14 is provided with a reverse gear r2 selectively engageable therewith. The seven and five gears share the five-gear drive gear 5a, and the six and eight gears share the six-gear drive gear 6 a.

The first half synchronizer 20b is sleeved on the first output shaft 13, and the first half synchronizer 20b is provided with a seven-gear driven gear 7b which coaxially rotates. When the first half synchronizer 20b is engaged with the eight speed driven gear 8b, the eight speed driven gear 8b and the seven speed driven gear 7b can rotate together.

The second half synchronizer 20a is fixed to the first output shaft 13, and the fourth-speed driven gear 4b is provided on the left side of the second half synchronizer 20 a. When the left side of the second half synchronizer 20a is engaged with the fourth-gear driven gear 4b, the fourth-gear driven gear 4b rotates together with the first output shaft 13.

The first synchronizer 21 is fixed to the first output shaft 13, and the first synchronizer 21 has a third-speed driven gear 3b on the right side and a seventh-speed driven gear 7b on the left side. When the right side of the first synchronizer 21 is engaged with the third-gear driven gear 3b, the third-gear driven gear 3b rotates together with the first output shaft 13. When the left side of the first synchronizer 21 is engaged with the seven speed driven gear 7b, the seven speed driven gear 7b rotates together with the first output shaft 13.

The second synchronizer 22 is fixed to the second output shaft 14, and the second synchronizer 22 has a reverse gear r2 on the right side and a fifth driven gear 5b on the left side. Wherein the reverse gear r2 and the second output shaft 14 are rotated in synchronization when the second synchronizer 22 is engaged with the reverse gear r2 on the right side. When the left side of the second synchronizer 22 is engaged with the fifth-speed driven gear 5b, the fifth-speed driven gear 5b and the second output shaft 14 can be rotated in synchronization.

The third synchronizer 23 is fixed to the second output shaft 14, and the sixth-gear driven gear 6b is provided on the right side of the third synchronizer 23, and the second-gear driven gear 2b is provided on the left side thereof. When the right side of the third synchronizer 23 is engaged with the sixth-gear driven gear 6b, the sixth-gear driven gear 6b and the second output shaft 14 can be synchronously rotated. When the left side of the third synchronizer 23 is engaged with the second-stage driven gear 2b, the second-stage driven gear 2b and the second output shaft 14 can be rotated synchronously.

As shown in fig. 4, the first-gear power transmission route: the engine 15 is in transmission with the second input shaft 11 through the clutch 16, the fifth-gear driving gear 5a rotates together with the second input shaft 11, the fifth-gear driving gear 5a is in meshed transmission with the seventh-gear driven gear 7b, because the seventh-gear driven gear 7b is coaxially fixed with the first half synchronizer 20b, when the first half synchronizer 20b is combined with the eighth-gear driven gear 8b, the seventh-gear driven gear 7b rotates together with the eighth-gear driven gear 8 b. The eight-speed driven gear 8b is in meshing transmission with the six-speed drive gear 6a, and since the six-speed drive gear 6a and the two-speed drive gear 2a are fixed together on the first input shaft 12, the six-speed drive gear 6a rotates together with the two-speed drive gear 2a, and the two-speed drive gear 2a is in meshing transmission with the two-speed driven gear 2 b. And the third synchronizer 23 is combined with the second-stage driven gear 2b, so that the second-stage driven gear 2b and the second output shaft 14 can rotate together and drive the second output shaft output gear 9c to rotate together, and the second output shaft output gear 9c is in meshing transmission with the main reducer driven gear 9b, so that power can be transmitted to the half shaft.

As shown in fig. 5, the two-gear power transmission route: the engine 15 is in transmission with the first input shaft 12 through the clutch 16, the second-gear driving gear 2a rotates together with the second input shaft 11, the second-gear driving gear 2a is in meshing transmission with the second-gear driven gear 2b, and the third synchronizer 23 is combined with the second-gear driven gear 2b, so that the second-gear driven gear 2b and the second output shaft 14 rotate together. The second output shaft output gear 9c on the second output shaft 14 is in meshing transmission with the final drive driven gear 9b so that power can be transmitted to the axle shafts.

As shown in fig. 6, the third-gear power transmission route: the engine 15 is in transmission with the second input shaft 11 through the clutch 16, the third-gear driving gear 3a rotates together with the second input shaft 11, the third-gear driving gear 3a is in meshing transmission with the third-gear driven gear 3b, and the first synchronizer 21 is combined with the third-gear driven gear 3b, so that the third-gear driven gear 3b and the first output shaft 13 rotate together. The first output shaft output gear 9a on the first output shaft 13 is in meshing transmission with the final drive driven gear 9b so that power can be transmitted to the axle shafts.

As shown in fig. 7, the fourth-speed power transmission route: the engine 15 is in transmission with the first input shaft 12 through the clutch 16, the fourth-gear driving gear 4a rotates together with the first input shaft 12, the fourth-gear driving gear 4a is in meshing transmission with the fourth-gear driven gear 4b, and the first half synchronizer 20b is combined with the fourth-gear driven gear 4b, so that the fourth-gear driven gear 4b and the first output shaft 13 rotate together. The first output shaft output gear 9a on the first output shaft 13 is in meshing transmission with the final drive driven gear 9b so that power can be transmitted to the axle shafts.

As shown in fig. 8, the fifth-gear power transmission route: the engine 15 is in transmission with the second input shaft 11 through the clutch 16, the fifth-gear driving gear 5a rotates together with the second input shaft 11, the fifth-gear driving gear 5a is in meshed transmission with the fifth-gear driven gear 5b, and the second synchronizer 22 is combined with the fifth-gear driven gear 5b, so that the fifth-gear driven gear 5b and the second output shaft 14 rotate together. The second output shaft output gear 9c on the second output shaft 14 is in meshing transmission with the final drive driven gear 9b so that power can be transmitted to the axle shafts.

As shown in fig. 9, the six-speed power transmission route: the engine 15 is in transmission with the first input shaft 12 through the clutch 16, the six-gear driving gear 6a rotates together with the first input shaft 12, the six-gear driving gear 6a is in meshing transmission with the six-gear driven gear 6b, and the third synchronizer 23 is combined with the six-gear driven gear 6b, so that the six-gear driven gear 6b and the second output shaft 14 rotate together. The second output shaft output gear 9c on the second output shaft 14 is in meshing transmission with the final drive driven gear 9b so that power can be transmitted to the axle shafts.

As shown in fig. 10, the seven-speed power transmission route: the engine 15 is in transmission with the second input shaft 11 through the clutch 16, the fifth-gear driving gear 5a rotates together with the first input shaft 12, the fifth-gear driving gear 5a is in meshed transmission with the seventh-gear driven gear 7b, and the first synchronizer 21 is combined with the seventh-gear driven gear 7b, so that the seventh-gear driven gear 7b and the first output shaft 13 rotate together. The first output shaft output gear 9a on the first output shaft 13 is in meshing transmission with the final drive driven gear 9b so that power can be transmitted to the axle shafts.

As shown in fig. 11, the eight speed power transmission route: the engine 15 is driven by the clutch 16 to rotate together with the first input shaft 12, the sixth-gear driving gear 6a rotates together with the first input shaft 12, the sixth-gear driving gear 6a is in meshed drive with the eighth-gear driven gear 8b, the first half synchronizer 20b is coupled to the eighth-gear driven gear 8b, and the first synchronizer 21 is coupled to the seventh-gear driven gear 7b, so that the eighth-gear driven gear 8b rotates together with the first output shaft 13. The first output shaft output gear 9a on the first output shaft 13 is in meshing transmission with the final drive driven gear 9b so that power can be transmitted to the axle shafts.

As shown in fig. 12, the reverse power transmission route: the engine 15 is in transmission with the second input shaft 11 through the clutch 16, the third-gear driving gear 3a and the second input shaft 11 rotate together, the third-gear driving gear 3a and the third-gear driven gear 3b are in meshing transmission, the third-gear driven gear 3b and the idler gear r1 are coaxially fixed, so that the third-gear driven gear 3b and the idler gear r1 rotate together, the idler gear r1 is in meshing engagement with the reverse gear r2, and the reverse gear r2 transmits power to the second output shaft 14. The second output shaft output gear 9c on the second output shaft 14 is in meshing transmission with the final drive driven gear 9b so that power can be transmitted to the axle shafts.

According to the second embodiment of the present invention, as shown in fig. 13, the first input shaft 12 is responsible for input of three, five, seven, and reverse gears, and the second input shaft 11 is responsible for input of two, four, six, and eight gears. That is, the third gear drive gear 3a, the fifth gear drive gear 5a, the sixth gear drive gear 6a, the second gear drive gear 2a, and the fourth gear drive gear 4a are provided in this order from the left to the right.

The second input shaft 11 is provided with a second gear drive gear 2a, a fourth gear drive gear 4a, and a sixth gear drive gear 6a, and the first input shaft 12 is provided with a third gear drive gear 3a and a fifth gear drive gear 5 a. The second output shaft 14 is provided with a second-gear driven gear 2b, a fifth-gear driven gear 5b, and a sixth-gear driven gear 6b, and the first output shaft 13 is provided with a third-gear driven gear 3b, a seventh-gear driven gear 7b, an eighth-gear driven gear 8b, and a fourth-gear driven gear 4 b. The first output shaft 13 is provided with an idler gear r1, an idler gear r1 is fixed coaxially with the third driven gear 3b, and the second output shaft 14 is provided with a reverse gear r2 selectively engageable therewith.

As shown in fig. 13, a parking gear P is further provided on the second output shaft 14, and the parking gear P can ensure that the vehicle does not roll when the vehicle stops running. Specifically, the parking range gear P is disposed on the right side of the secondary driven gear 2 b.

Thus, through the first embodiment and the second embodiment, the transmission can realize gear shifting between eight forward gears and one reverse gear, the axial size of the transmission is two synchronizer widths plus five gear widths, and the structure is compact. The reverse gear shaft is eliminated from the transmission, and only 3 whole synchronizers and 2 half synchronizers are used in the transmission, so that the production cost of the transmission is saved. In addition, a first gear is omitted from the transmission, a first gear is realized by combining a seventh gear, an eighth gear and a second gear, the gears are repeatedly utilized, and the cost of a first gear gearwheel is saved. Furthermore, the reverse gear of the transmission is realized by combining a plurality of gear gears, and the gears are recycled, so that the cost can be saved.

It should be noted that the transmission of the present invention is not limited to eight forward gears, but may have other numbers of forward gears, such as six forward gears, and ten forward gears.

As shown in fig. 3, the common projected area of the first synchronizer half 20b and the second synchronizer half 20a in the horizontal plane and the projected area of the secondary driven gear 2b in the horizontal plane have an axial overlapping area. So set up, realized the great second gear driven gear 2b of tooth width and first half synchronous ware 20b and the projection coincidence of second half synchronous ware 20a in the axial better for the derailleur structure is compacter, is convenient for the installation and the production of derailleur.

A vehicle according to an embodiment of a second aspect of the invention includes the transmission of the above embodiment.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

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

Claims

1. A transmission, comprising:

the first output shaft is at least provided with a first gear driven gear, a second gear driven gear, a first semi-synchronizer, a second semi-synchronizer and a fixed shaft, the fixed shaft is sleeved on the first output shaft, the first gear driven gear is sleeved on the fixed shaft, the first semi-synchronizer is fixed on the fixed shaft and used for selectively combining the first gear driven gear, the second gear driven gear is sleeved on the first output shaft, and the second semi-synchronizer is fixed on the first output shaft and used for selectively combining the second gear driven gear;

a fork device, the fork device comprising: the fork lever comprises a fork lever body, a first fork foot and a second fork foot, wherein the first fork foot and the second fork foot are arranged on the fork lever body and are arranged at intervals in the length direction of the fork lever body, the first fork foot is matched with the first synchronizer, and the second fork foot is matched with the second synchronizer.

2. The transmission of claim 1, wherein the first gear driven gear and the second gear driven gear are two gear driven gears disposed axially adjacent to each other, and the first half synchronizer and the second half synchronizer are two half synchronizers disposed axially adjacent to each other and located between the first gear driven gear and the second gear driven gear.

3. The transmission of claim 1, wherein a side of the first gear driven gear facing the first half synchronizer and a side of the second gear driven gear facing the second half synchronizer are each provided with a coupling tooth;

the first and second half-synchronizers each include: synchronous hub, synchronizer ring and synchronous tooth cover, the synchronizer ring only set up in the one side of synchronous hub towards the fender position driven gear that corresponds, with correspond the combination tooth combines together, synchronous tooth cover is located on the synchronous hub.

4. The transmission of claim 1, wherein the fork arrangement further comprises: the first connecting rod and the second connecting rod are arranged in the length direction of the shifting fork rod at intervals, and the first shifting fork foot is connected with the first connecting rod and the second shifting fork foot is connected with the second connecting rod.

5. The transmission of any one of claims 1-4, comprising:

the first input shaft is provided with at least a second-gear driving gear and a highest-gear driving gear;

the second input shaft is at least provided with a secondary high-gear driving gear;

the second output shaft is provided with at least a second-gear driven gear which is selectively combined, and the second-gear driven gear is meshed with the second-gear driving gear;

the first output shaft is at least provided with a secondary high-gear driven gear and a highest-gear driven gear which are selectively combined, the secondary high-gear driven gear is meshed with the secondary high-gear driving gear, the highest-gear driven gear is meshed with the highest-gear driving gear, and the secondary high-gear driven gear and the highest-gear driven gear are further selectively combined;

when the second-highest-gear driven gear is combined with the highest-gear driven gear and the second-gear driven gear is combined with the second output shaft, the second input shaft, the second-highest-gear driving gear, the second-highest-gear driven gear, the highest-gear driving gear, the first input shaft, the second-gear driving gear, the second-gear driven gear and the second output shaft form a power transmission path corresponding to a first gear.

6. The transmission of claim 5, wherein the second highest driven gear is fixed to the fixed shaft, and the highest driven gear is the first highest driven gear, and the highest driven gear is located between the second highest driven gear and the first half synchronizer.

7. The transmission of claim 6, wherein the first output shaft further has a first synchronizer fixed thereto and provided with a selectively engageable third gear driven gear, the first synchronizer being provided between the third gear driven gear and the next highest gear driven gear to selectively engage the third gear driven gear and the first output shaft and to selectively engage the next highest gear driven gear and the first output shaft.

8. The transmission of claim 7 wherein said third driven gear is further coaxially disposed with an idler gear, said second output shaft is further disposed with a selectively engageable reverse gear, said reverse gear is in meshing engagement with said idler gear, and said second output shaft is disposed with a second synchronizer for engaging said reverse gear.

9. The transmission of claim 6, wherein a fourth-gear driven gear and a fifth-gear driven gear which are selectively coupled are provided on the second output shaft, a second highest-gear driving gear which is engaged with the second highest-gear driven gear is provided on the second input shaft, and the fourth-gear driven gear and the second highest-gear driven gear share the second highest-gear driving gear;

the first input shaft is provided with a highest gear driving gear meshed with the highest gear driven gear, and the fifth gear driven gear and the highest gear driven gear share the highest gear driving gear.

10. The transmission of claim 9 wherein said second output shaft is fixedly disposed with a second synchronizer and a third synchronizer and is disposed with a selectively engageable reverse gear, said second synchronizer is disposed between said fourth gear driven gear and said reverse gear to selectively engage said fourth gear driven gear and said second output shaft and to selectively engage said reverse gear and said second output shaft, said third synchronizer is disposed between said second gear driven gear and said fifth gear driven gear to selectively engage said second gear driven gear and said second output shaft and to selectively engage said fifth gear driven gear and said second output shaft.

11. The transmission of claim 5, wherein a common projected area of the first synchronizer half and the second synchronizer half in a horizontal plane and a projected area of the second driven gear in a horizontal plane have an axially coincident region.

12. A vehicle comprising a transmission according to any one of claims 1 to 11.