阅读说明：本技术 一种模块化设计变速箱及挡位实现方法 (Modular design gearbox and gear implementation method ) 是由 詹东安 吕昌 闫伟朋 石国国 张刚 于 2020-05-14 设计创作，主要内容包括：本发明涉及一种模块化设计变速箱及挡位实现方法,该变速箱包括箱体及驱动轴、四根中间轴和输出轴,该变速箱为六轴的布局,其中驱动轴S1、中间轴S4、中间轴S5上装有2个离合器包,中间轴S2上装有1个离合器包,这样的结构,传动路径短,稳定性更好。该变速箱通过6轴、7离合器实现最高前进8挡后退4挡的模式,速比范围宽,且可灵活调整,可通过减少部分零件的手段,实现少挡位的模式,实现模块化,提高通用性,降低变速箱的生产成本和使用成本,同时,前进挡均由两个离合器结合和四次齿轮啮合实现,后退挡均由两个离合器结合和三次齿轮啮合实现,传动路径短,可靠性高。(The invention relates to a modular design gearbox and a gear implementation method, wherein the gearbox comprises a box body, a driving shaft, four intermediate shafts and an output shaft, the gearbox is in a six-shaft layout, 2 clutch packs are arranged on the driving shaft S1, the intermediate shaft S4 and the intermediate shaft S5, and 1 clutch pack is arranged on the intermediate shaft S2. This gearbox realizes the mode that the highest 8 keep off and retreat 4 keep off of advancing through 6 axles, 7 clutches, and the velocity ratio range is wide, and can adjust in a flexible way, and the accessible reduces the means of part, realizes the mode of few fender position, realizes the modularization, improves the commonality, reduces the manufacturing cost and the use cost of gearbox, and simultaneously, the fender that advances is combined and the quartic gear engagement by two clutches and realizes, retreat to keep off and combine and the cubic gear engagement by two clutches and realize, and the transmission route is short, and the reliability is high.)

1. The utility model provides a modularization design gearbox, includes the box, its characterized in that still includes:

a drive shaft S1 on which a fixed gear Z2, a floating gear Z1 mounted through a clutch CR, and a floating gear Z3 mounted through a clutch CF are provided;

an intermediate shaft S2 on which a fixed gear Z4, a fixed gear Z6 and a floating gear Z5 mounted by a clutch CFH are provided; the fixed gear Z6 is meshed with the floating gear Z3, and the floating gear Z5 is meshed with the fixed gear Z2;

an intermediate shaft S3 on which a fixed gear Z7 and a fixed gear Z8 are provided; the fixed gear Z7 meshes with the floating gear Z1, and the fixed gear Z7 meshes with the fixed gear Z4;

an intermediate shaft S4 on which a fixed gear Z11, a floating gear Z9 mounted through a clutch C2, and a floating gear Z10 mounted through a clutch C1 are provided; the floating gear Z9 is meshed with the fixed gear Z7, and the floating gear Z10 is meshed with the fixed gear Z8;

an intermediate shaft S5 on which a fixed gear Z14, a floating gear Z12 mounted through a clutch C4, and a floating gear Z13 mounted through a clutch C3 are provided; the floating gear Z12 is meshed with the fixed gear Z7, and the floating gear Z13 is meshed with the fixed gear Z8;

an output shaft S6 on which a fixed gear Z15 and a fixed gear Z16 are provided, the fixed gear Z15 being meshed with the fixed gear Z11, the fixed gear Z16 being meshed with the fixed gear Z14;

in the forward mode, the drive shaft S1, the intermediate shaft S3 and the output shaft S6 rotate in the same direction and in the opposite direction to the intermediate shaft S2, the intermediate shaft S4 and the intermediate shaft S5;

in the reverse gear mode, the driving shaft S1, the intermediate shaft S4 and the intermediate shaft S5 rotate in the same direction, and the intermediate shaft S2 does not participate in transmission in the opposite direction to the rotation direction of the intermediate shaft S3 and the output shaft S6.

2. A modular design transmission according to claim 1, wherein a line connecting the axis of the drive shaft S1, the axis of the intermediate shaft S2 and the projection of the axis of the intermediate shaft S3 in a plane perpendicular to the axis of the drive shaft S1 is triangular, and a line connecting the axis of the intermediate shaft S3, the axis of the intermediate shaft S4, the axis of the intermediate shaft S5 and the projection of the axis of the output shaft S6 in a plane perpendicular to the axis of the intermediate shaft S3 is quadrilateral.

3. A gear realization method for a modular design gearbox according to claim 1 or 2, characterised in that it is used to realize multiple gear modes, including forward 8/reverse 4 modes;

when the clutch CF is in an engaged state, a first forward path is formed from the floating gear Z3, through the fixed gear Z6, the fixed gear Z4, to the fixed gear Z7;

when the clutch CFH is in the engaged state, a second forward path is formed from the fixed gear Z2, through the floating gear Z5, the fixed gear Z4, to the fixed gear Z7;

when the clutch C1 is in the engaged state, a first output path is formed from the fixed gear Z8, through the floating gear Z10, the fixed gear Z11, to the fixed gear Z15;

when the clutch C2 is in the engaged state, a second output path is formed from the floating gear Z9, through the fixed gear Z11, to the fixed gear Z15;

when the clutch C3 is in the engaged state, a third output path is formed from the fixed gear Z8, through the floating gear Z13, the fixed gear Z14, to the fixed gear Z16;

when the clutch C4 is in the engaged state, a fourth output path is formed from the floating gear Z12, through the fixed gear Z14, to the fixed gear Z16;

a reverse path is formed from the floating gear Z1 to the fixed gear Z7 when the clutch CR is in an engaged state;

forward 8/reverse 4 mode wherein:

advancing to a 1 gear: the clutch CF and the clutch C1 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 through the first forward path and the first output path;

advancing for 2 gears: the clutch CFH and the clutch C1 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 via the second forward path and the first output path;

advancing in a 3-gear: the clutch CF and the clutch C2 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 through the first forward path and the second output path;

advancing for 4 gears: the clutch CFH and the clutch C2 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 via the second forward path and the second output path;

advancing in 5 gears: the clutch CF and the clutch C3 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 through the first forward path and the third output path;

advancing for 6 gears: the clutch CFH and the clutch C3 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 via the second forward path and the third output path;

advancing to 7 gears: the clutch CF and the clutch C4 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 through the first forward path and the fourth output path;

advancing for 8 gears: the clutch CFH and the clutch C4 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 via the second forward path and the fourth output path;

backing off a 1 gear: the clutch CR and the clutch C1 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 via the reverse path and the first output path;

backing off 2 gears: the clutch CR and the clutch C2 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 through the reverse path and the second output path;

backing off 3 gears: the clutch CR and the clutch C3 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 through the reverse path and the third output path;

4, backing off: the clutch CR and the clutch C4 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 through the reverse path and the fourth output path.

4. The gear implementation method of a modular design gearbox according to claim 3, characterized by being used for implementing a low gear mode, wherein the low gear mode comprises a forward 4 gear/reverse 4 gear mode;

forward 4/reverse 4 mode, the clutch CFH, the floating gear Z5 and the fixed gear Z2 are not engaged in transmission, wherein:

advancing to a 1 gear: the transmission path is the same as that of the forward 1 gear in the forward 8-gear/reverse 4-gear mode;

advancing for 2 gears: the transmission path is the same as that of the forward 3 gear in the forward 8-gear/reverse 4-gear mode;

advancing in a 3-gear: the transmission path is the same as that of the forward 5 gear in the forward 8-gear/reverse 4-gear mode;

advancing for 4 gears: the transmission path is the same as that of the forward 7 gear in the forward 8-gear/reverse 4-gear mode;

backing off a 1 gear: the same as the transmission path of reverse 1 gear in the forward 8-gear/reverse 4-gear mode;

backing off 2 gears: the transmission path is the same as that of the reverse 2 gear in the forward 8-gear/reverse 4-gear mode;

backing off 3 gears: the same as the transmission path of reverse 3 gear in the forward 8-gear/reverse 4-gear mode;

4, backing off: the same as the reverse 4-speed transmission path in the forward 8-speed/reverse 4-speed mode.

5. The gear implementation method of a modular design gearbox according to claim 3, characterized by being used for implementing a low gear mode, wherein the low gear mode comprises a forward 4 gear/reverse 4 gear mode;

in forward 4/reverse 4 mode, the clutch CF, the floating gear Z3 and the fixed gear Z6 are not engaged in transmission, wherein:

advancing to a 1 gear: the transmission path is the same as that of the forward 2 gear in the forward 8-gear/reverse 4-gear mode;

advancing for 2 gears: the transmission path is the same as that of the forward 4 gear in the forward 8-gear/reverse 4-gear mode;

advancing in a 3-gear: the transmission path is the same as that of the forward 6 gear in the forward 8-gear/reverse 4-gear mode;

advancing for 4 gears: the transmission path is the same as that of the forward 8 gear in the forward 8-gear/reverse 4-gear mode;

backing off a 1 gear: the same as the transmission path of reverse 1 gear in the forward 8-gear/reverse 4-gear mode;

backing off 2 gears: the transmission path is the same as that of the reverse 2 gear in the forward 8-gear/reverse 4-gear mode;

backing off 3 gears: the same as the transmission path of reverse 3 gear in the forward 8-gear/reverse 4-gear mode;

4, backing off: the same as the reverse 4-speed transmission path in the forward 8-speed/reverse 4-speed mode.

Technical Field

The invention relates to the technical field of gearboxes, in particular to a modularly designed gearbox and a gear implementation method.

Background

The engineering machinery main engine products are various in types and relatively small in single type demand, the gearbox is not designed and developed aiming at various main engines, the gearbox which needs to be applied to the engineering machinery can cover various products with similar power sections, in addition, the working conditions of the engineering machinery main engine products are complex, the requirements of gear positions and transmission ratios are different, and higher requirements are provided for the gear positions, the flexibility of the gear speed ratios and the universality of parts of the engineering machinery gearbox.

For a host machine with multi-gear requirements, a client has higher requirements on smoothness of a product, and a gearbox is required to have more gear numbers and a larger speed ratio range, taking a land leveler as an example, a transmission applied to the land leveler at present is a fixed shaft type gearbox mainly based on a ZF technical scheme, the speed ratio of a forward gear and a first gear is about 5.2, in recent years, along with the increasing requirements of land leveler users on smoothness experience of the host machine, the land leveler needs the gearbox to move forward and first gear to provide a larger speed ratio (about 7.5) so as to reduce the sensitivity of the host machine to an external load during operation and improve the operation smoothness, and in addition, the gear numbers of the gearbox, particularly the gear number of the forward gear, are required to be increased (8), so that the gear shifting impact is reduced and the gear shifting smoothness is improved.

For part of main machines such as a loader, the shovel loader operation cycle of repeatedly switching forward 2 gears, forward 1 gears and reverse 2 gears is only carried out in a small area, the excessive gears can lead to complex operation and low efficiency, the requirement of few gears is provided for the gearbox, and if the few gears are realized by inhibiting partial clutches through the multi-gear gearbox, the number of actual parts is not reduced, and unnecessary waste can be caused. The redesigned and developed new structure of the few-gear transmission not only increases the design cost, but also hardly ensures the universality with the original multi-gear transmission components, thereby increasing the production cost.

On the other hand, the transmission in the field of engineering machinery is divided into a planetary transmission and a fixed shaft type transmission according to the form of a gear train, wherein the planetary transmission has a compact structure and a small required space, but has a complex structure, high precision requirement, few gear positions, short service life and high failure rate, and the fixed shaft type transmission has a simple structural design, is easy to realize gear position changing, has a high gear ratio and high adaptability, is convenient to manufacture and maintain, can meet the requirements of flexibility and modularization of the transmission of the engineering machinery, and is a development trend of a high-end market in the future engineering machinery.

The fixed shaft type gearbox applied to the engineering machinery industry at present can be divided into two types according to the arrangement mode of the clutch on the shaft, wherein one type is that two clutch packs are arranged on one shaft, the most applied market is the WG series transmission structure scheme from German ZF company, such as the scheme mentioned in the patent CN202392055U, and the other type is that only one clutch pack is arranged on one shaft, the structure scheme is such as the scheme mentioned in the patent CN100491768C, the two technical schemes can achieve the front 6 and rear 3 gears at the highest, and the speed ratio range is 0.6-6.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a modularly designed gearbox and a gear implementation method, wherein a mode of two clutches on a single shaft is adopted, a mode of highest forward 8 gears and highest reverse 4 gears is implemented through 6-shaft and 7-shaft clutches, the speed ratio range is wide, the adjustment can be flexibly carried out, a mode of few gears can be implemented through means of reducing part of parts, the modularization is implemented, the universality is improved, and the production cost and the use cost of the gearbox are reduced.

As one aspect of the invention, a modular design transmission is provided.

A modular design gearbox comprising a case and further comprising:

a drive shaft S1 on which a fixed gear Z2, a floating gear Z1 mounted through a clutch CR, and a floating gear Z3 mounted through a clutch CF are provided;

an intermediate shaft S2 on which a fixed gear Z4, a fixed gear Z6 and a floating gear Z5 mounted by a clutch CFH are provided; the fixed gear Z6 is meshed with the floating gear Z3, and the floating gear Z5 is meshed with the fixed gear Z2;

an intermediate shaft S3 on which a fixed gear Z7 and a fixed gear Z8 are provided; the fixed gear Z7 meshes with the floating gear Z1, and the fixed gear Z7 meshes with the fixed gear Z4;

an intermediate shaft S4 on which a fixed gear Z11, a floating gear Z9 mounted through a clutch C2, and a floating gear Z10 mounted through a clutch C1 are provided; the floating gear Z9 is meshed with the fixed gear Z7, and the floating gear Z10 is meshed with the fixed gear Z8;

an intermediate shaft S5 on which a fixed gear Z14, a floating gear Z12 mounted through a clutch C4, and a floating gear Z13 mounted through a clutch C3 are provided; the floating gear Z12 is meshed with the fixed gear Z7, and the floating gear Z13 is meshed with the fixed gear Z8;

an output shaft S6 on which a fixed gear Z15 and a fixed gear Z16 are provided, the fixed gear Z15 being meshed with the fixed gear Z11, the fixed gear Z16 being meshed with the fixed gear Z14;

in the forward mode, the drive shaft S1, the intermediate shaft S3 and the output shaft S6 rotate in the same direction and in the opposite direction to the intermediate shaft S2, the intermediate shaft S4 and the intermediate shaft S5;

in the reverse gear mode, the driving shaft S1, the intermediate shaft S4 and the intermediate shaft S5 rotate in the same direction, and the intermediate shaft S2 does not participate in transmission in the opposite direction to the rotation direction of the intermediate shaft S3 and the output shaft S6.

Alternatively, a connection line of the shaft axis of the drive shaft S1, the shaft axis of the intermediate shaft S2, and the projection of the shaft axis of the intermediate shaft S3 in a plane perpendicular to the shaft axis of the drive shaft S1 is triangular, and a connection line of the shaft axis of the intermediate shaft S3, the shaft axis of the intermediate shaft S4, the shaft axis of the intermediate shaft S5, and the projection of the shaft axis of the output shaft S6 in a plane perpendicular to the shaft axis of the intermediate shaft S3 is quadrilateral.

As another aspect of the invention, a gear implementation method for a modular design gearbox is provided.

A gear implementation method of the modular design gearbox is used for implementing multi-gear modes, wherein the multi-gear modes comprise a forward 8-gear/reverse 4-gear mode;

when the clutch CF is in an engaged state, a first forward path is formed from the floating gear Z3, through the fixed gear Z6, the fixed gear Z4, to the fixed gear Z7;

when the clutch CFH is in the engaged state, a second forward path is formed from the fixed gear Z2, through the floating gear Z5, the fixed gear Z4, to the fixed gear Z7;

when the clutch C1 is in the engaged state, a first output path is formed from the fixed gear Z8, through the floating gear Z10, the fixed gear Z11, to the fixed gear Z15;

when the clutch C2 is in the engaged state, a second output path is formed from the floating gear Z9, through the fixed gear Z11, to the fixed gear Z15;

when the clutch C3 is in the engaged state, a third output path is formed from the fixed gear Z8, through the floating gear Z13, the fixed gear Z14, to the fixed gear Z16;

when the clutch C4 is in the engaged state, a fourth output path is formed from the floating gear Z12, through the fixed gear Z14, to the fixed gear Z16;

a reverse path is formed from the floating gear Z1 to the fixed gear Z7 when the clutch CR is in an engaged state;

forward 8/reverse 4 mode wherein:

advancing to a 1 gear: the clutch CF and the clutch C1 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 through the first forward path and the first output path;

advancing for 2 gears: the clutch CFH and the clutch C1 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 via the second forward path and the first output path;

advancing in a 3-gear: the clutch CF and the clutch C2 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 through the first forward path and the second output path;

advancing for 4 gears: the clutch CFH and the clutch C2 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 via the second forward path and the second output path;

advancing in 5 gears: the clutch CF and the clutch C3 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 through the first forward path and the third output path;

advancing for 6 gears: the clutch CFH and the clutch C3 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 via the second forward path and the third output path;

advancing to 7 gears: the clutch CF and the clutch C4 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 through the first forward path and the fourth output path;

advancing for 8 gears: the clutch CFH and the clutch C4 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 via the second forward path and the fourth output path;

backing off a 1 gear: the clutch CR and the clutch C1 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 via the reverse path and the first output path;

backing off 2 gears: the clutch CR and the clutch C2 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 through the reverse path and the second output path;

backing off 3 gears: the clutch CR and the clutch C3 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 through the reverse path and the third output path;

4, backing off: the clutch CR and the clutch C4 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 through the reverse path and the fourth output path.

Optionally, the above method is used to achieve a few gear mode, a forward 4/reverse 4 mode, the clutch CFH, the floating gear Z5 and the fixed gear Z2 are not engaged in the transmission, wherein:

advancing to a 1 gear: the transmission path is the same as that of the forward 1 gear in the forward 8-gear/reverse 4-gear mode;

advancing for 2 gears: the transmission path is the same as that of the forward 3 gear in the forward 8-gear/reverse 4-gear mode;

advancing in a 3-gear: the transmission path is the same as that of the forward 5 gear in the forward 8-gear/reverse 4-gear mode;

advancing for 4 gears: the transmission path is the same as that of the forward 7 gear in the forward 8-gear/reverse 4-gear mode;

backing off a 1 gear: the same as the transmission path of reverse 1 gear in the forward 8-gear/reverse 4-gear mode;

backing off 2 gears: the transmission path is the same as that of the reverse 2 gear in the forward 8-gear/reverse 4-gear mode;

backing off 3 gears: the same as the transmission path of reverse 3 gear in the forward 8-gear/reverse 4-gear mode;

4, backing off: the same as the reverse 4-speed transmission path in the forward 8-speed/reverse 4-speed mode.

Optionally, the above method is used to achieve a few gear mode, forward 4/reverse 4 mode, the clutch CF, the floating gear Z3 and the fixed gear Z6 are not engaged in the transmission, wherein:

advancing to a 1 gear: the transmission path is the same as that of the forward 2 gear in the forward 8-gear/reverse 4-gear mode;

advancing for 2 gears: the transmission path is the same as that of the forward 4 gear in the forward 8-gear/reverse 4-gear mode;

advancing in a 3-gear: the transmission path is the same as that of the forward 6 gear in the forward 8-gear/reverse 4-gear mode;

advancing for 4 gears: the transmission path is the same as that of the forward 8 gear in the forward 8-gear/reverse 4-gear mode;

backing off a 1 gear: the same as the transmission path of reverse 1 gear in the forward 8-gear/reverse 4-gear mode;

backing off 2 gears: the transmission path is the same as that of the reverse 2 gear in the forward 8-gear/reverse 4-gear mode;

backing off 3 gears: the same as the transmission path of reverse 3 gear in the forward 8-gear/reverse 4-gear mode;

4, backing off: the same as the reverse 4-speed transmission path in the forward 8-speed/reverse 4-speed mode.

The technical scheme of the invention has the beneficial effects that: the invention relates to a modularly designed gearbox and a direction implementation method, which adopt the form of two clutches on a single shaft, realize the mode of highest forward 8 gears and backward 4 gears through 6 shafts and 7 clutches, have wide speed ratio range and flexible adjustment, realize the mode of few gears by means of reducing part of parts, realize modularization, improve universality and reduce the production cost and the use cost of the gearbox, simultaneously, forward gears are realized by combining the two clutches and meshing four times of gears, backward gears are realized by combining the two clutches and meshing three times of gears, the transmission path is short and the reliability is high.

Drawings

FIG. 1 is a schematic transmission diagram of the modular design transmission of the present invention in forward 8-speed/reverse 4-speed mode;

FIG. 2 is an end-face topology of the structure of FIG. 1;

FIG. 3 is a first transmission schematic in forward 4-speed/reverse 4-speed mode of the modular design transmission of the present invention;

FIG. 4 is a second transmission schematic diagram for the forward 4-speed/reverse 4-speed mode of the modular design transmission of the present invention.

Detailed Description

Exemplary embodiments of the present invention are described below with reference to the accompanying drawings, in which various details of embodiments of the invention are included to assist understanding, and which are to be considered as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

Referring to fig. 1 and 2, the modular gearbox comprises a box body, and further comprises a driving shaft S1, an intermediate shaft S2, an intermediate shaft S3, an intermediate shaft S4, an intermediate shaft S5 and an output shaft S6; the driving shaft S1 is provided with a fixed gear Z2, a floating gear Z1 mounted through a clutch CR, and a floating gear Z3 mounted through a clutch CF; the intermediate shaft S2 is provided with a fixed gear Z4, a fixed gear Z6 and a floating gear Z5 mounted through a clutch CFH; the fixed gear Z6 is meshed with the floating gear Z3, and the floating gear Z5 is meshed with the fixed gear Z2; the intermediate shaft S3 is provided with a fixed gear Z7 and a fixed gear Z8; the fixed gear Z7 is meshed with the floating gear Z1, and the fixed gear Z7 is meshed with the fixed gear Z4; the intermediate shaft S4 is provided with a fixed gear Z11, a floating gear Z9 mounted through a clutch C2 and a floating gear Z10 mounted through a clutch C1; the floating gear Z9 is meshed with the fixed gear Z7, and the floating gear Z10 is meshed with the fixed gear Z8; the intermediate shaft S5 is provided with a fixed gear Z14, a floating gear Z12 mounted through a clutch C4 and a floating gear Z13 mounted through a clutch C3; the floating gear Z12 is meshed with the fixed gear Z7, and the floating gear Z13 is meshed with the fixed gear Z8; the output shaft S6 is provided with a fixed gear Z15 and a fixed gear Z16, the fixed gear Z15 is meshed with the fixed gear Z11, and the fixed gear Z16 is meshed with the fixed gear Z14; in the forward gear mode, the rotation directions of the driving shaft S1, the intermediate shaft S3 and the output shaft S6 are the same, and are opposite to the rotation directions of the intermediate shaft S2, the intermediate shaft S4 and the intermediate shaft S5; in the reverse mode, the drive shaft S1, the countershaft S4, and the countershaft S5 rotate in the same direction and in the opposite direction to the rotation of the countershaft S3 and the output shaft S6, and the countershaft S2 is not engaged in transmission.

Further, a connection line of the shaft axis of the drive shaft S1, the shaft axis of the intermediate shaft S2, and the projection of the shaft axis of the intermediate shaft S3 in a plane perpendicular to the shaft axis of the drive shaft S1 is triangular, and a connection line of the shaft axis of the intermediate shaft S3, the shaft axis of the intermediate shaft S4, the shaft axis of the intermediate shaft S5, and the projection of the shaft axis of the output shaft S6 in a plane perpendicular to the shaft axis of the intermediate shaft S3 is quadrilateral.

The gear implementation method of the modular design gearbox is used for implementing a multi-gear mode, wherein the multi-gear mode comprises a forward 8-gear/reverse 4-gear mode;

when the clutch CF is in the engaged state, a first forward path is formed from the floating gear Z3, through the fixed gear Z6, the fixed gear Z4, to the fixed gear Z7;

when the clutch CFH is in the engaged state, a second forward path is formed from the fixed gear Z2, through the floating gear Z5, the fixed gear Z4, to the fixed gear Z7;

when clutch C1 is in the engaged state, a first output path is formed from fixed gear Z8, through floating gear Z10, fixed gear Z11, to fixed gear Z15;

when clutch C2 is in the engaged state, a second output path is formed from floating gear Z9, through fixed gear Z11, to fixed gear Z15;

when clutch C3 is in the engaged state, a third output path is formed from fixed gear Z8, through floating gear Z13, fixed gear Z14, to fixed gear Z16;

when clutch C4 is in the engaged state, a fourth output path is formed from floating gear Z12, through fixed gear Z14, to fixed gear Z16;

when the clutch CR is in the engaged state, a reverse path is formed from the floating gear Z1 to the fixed gear Z7;

forward 8/reverse 4 mode wherein:

advancing to a 1 gear: the clutch CF and the clutch C1 are engaged, and the drive shaft S1 transmits power to the output shaft S6 via the first forward path and the first output path;

advancing for 2 gears: the clutch CFH and the clutch C1 are engaged, and the drive shaft S1 transmits power to the output shaft S6 via the second forward path and the first output path;

advancing in a 3-gear: the clutch CF and the clutch C2 are engaged, and the drive shaft S1 transmits power to the output shaft S6 via the first forward path and the second output path;

advancing for 4 gears: the clutch CFH and the clutch C2 are engaged, and the drive shaft S1 transmits power to the output shaft S6 via the second forward path and the second output path;

advancing in 5 gears: the clutch CF and the clutch C3 are engaged, and the drive shaft S1 transmits power to the output shaft S6 via the first forward path and the third output path;

advancing for 6 gears: the clutch CFH and the clutch C3 are engaged, and the drive shaft S1 transmits power to the output shaft S6 via the second forward path and the third output path;

advancing to 7 gears: the clutch CF and the clutch C4 are engaged, and the drive shaft S1 transmits power to the output shaft S6 via the first forward path and the fourth output path;

advancing for 8 gears: the clutch CFH and the clutch C4 are engaged, and the drive shaft S1 transmits power to the output shaft S6 via the second forward path and the fourth output path;

backing off a 1 gear: the clutch CR and the clutch C1 are in an engaged state, and the drive shaft S1 transmits power to the output shaft S6 via the reverse path and the first output path;

backing off 2 gears: the clutch CR and the clutch C2 are engaged, and the drive shaft S1 transmits power to the output shaft S6 through the reverse path and the second output path;

backing off 3 gears: the clutch CR and the clutch C3 are engaged, and the drive shaft S1 transmits power to the output shaft S6 through the reverse path and the third output path;

4, backing off: the clutch CR and the clutch C4 are engaged, and the drive shaft S1 transmits power to the output shaft S6 through the reverse path and the fourth output path;

see table 1 for clutch engagement.

TABLE 1 Clutch CONNECTION TABLE FOR OPERATION OF SHIFTS IN FORWARD-8/BACK-4 SHIFT MODES

As shown in fig. 3, the above method is used to realize the structure of the less gear mode, the forward 4-gear/reverse 4-gear mode, the clutch CFH, the floating gear Z5 and the fixed gear Z2 are not involved in the transmission, wherein:

advancing to a 1 gear: the same as the transmission path of forward 1 gear in the forward 8-gear/reverse 4-gear mode;

advancing for 2 gears: the same as the transmission path of forward 3 gear in the forward 8-gear/reverse 4-gear mode;

advancing in a 3-gear: the same as the transmission path of forward 5 gear in the forward 8-gear/reverse 4-gear mode;

advancing for 4 gears: the same as the forward 7 gear transmission path in the forward 8 gear/reverse 4 gear mode;

backing off a 1 gear: the same as the transmission path of reverse 1 gear in the forward 8-gear/reverse 4-gear mode;

backing off 2 gears: the same as the transmission path of reverse 2 gear in the forward 8-gear/reverse 4-gear mode;

backing off 3 gears: the same as the transmission path of reverse 3 gear in the forward 8-gear/reverse 4-gear mode;

4, backing off: the same as the transmission path of reverse 4-gear in the forward 8-gear/reverse 4-gear mode;

see table 2 for clutch engagement.

TABLE 2 Clutch engaging condition table for each gear operation in Forward 4/reverse 4 modes

As shown in fig. 4, the above method is used to realize the structure of the less gear mode, the forward 4-gear/reverse 4-gear mode, the clutch CF, the floating gear Z3 and the fixed gear Z6 are not involved in the transmission, wherein:

advancing to a 1 gear: the same as the transmission path of forward 2 gear in the forward 8-gear/reverse 4-gear mode;

advancing for 2 gears: the same as the transmission path of forward 4 gear in the forward 8-gear/reverse 4-gear mode;

advancing in a 3-gear: the same as the transmission path of forward 6 gear in the forward 8-gear/reverse 4-gear mode;

advancing for 4 gears: the same as the transmission path of forward 8 gear in the forward 8-gear/reverse 4-gear mode;

backing off a 1 gear: the same as the transmission path of reverse 1 gear in the forward 8-gear/reverse 4-gear mode;

backing off 2 gears: the same as the transmission path of reverse 2 gear in the forward 8-gear/reverse 4-gear mode;

backing off 3 gears: the same as the transmission path of reverse 3 gear in the forward 8-gear/reverse 4-gear mode;

4, backing off: the same as the transmission path of reverse 4-gear in the forward 8-gear/reverse 4-gear mode;

see table 3 for clutch engagement.

TABLE 3 Clutch engaging status table for each gear in forward 4/reverse 4 modes

In the transmission case of the technical scheme, 2 clutch packs are arranged on the driving shaft S1, the intermediate shaft S4 and the intermediate shaft S5 and 1 clutch pack is arranged on the intermediate shaft S2 through the layout of six shafts, so that the transmission path is short, the stability is better, and the gear on the driving shaft S1 and the gear on the output shaft S6 can be adjusted in a larger range, so that the speed ratio range can reach 0.6-8.

In conclusion, the modularly designed gearbox and the orientation implementation method in the technical scheme adopt a form of two clutches on a single shaft, realize the mode of highest forward 8 gears and reverse 4 gears through 6 shafts and 7 clutches, can control different clutches to be combined and further be adjusted to the modes of forward 7 gears and reverse 3 gears, forward 6 gears and reverse 3 gears, forward 5 gears and reverse 3 gears and forward 4 gears and reverse 3 gears, and meet the requirements of different hosts on different gears; the speed ratio range is wide, and can adjust in a flexible way, and the accessible reduces the means of part, realizes few mode of keeping off the position, realizes the modularization, improves the commonality, reduces the manufacturing cost and the use cost of gearbox, and simultaneously, the fender that advances is realized by two clutch combinations and quartic gear engagement, and the fender that backs is realized by two clutch combinations and cubic gear engagement, and the transmission route is short, and the reliability is high.

The above detailed description should not be construed as limiting the scope of the invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions can occur, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.