CN211501507U

CN211501507U - Tractor speed change system and tractor

Info

Publication number: CN211501507U
Application number: CN201922295969.7U
Authority: CN
Inventors: 谢太林; 郭华; 程少奇; 王敏峰
Original assignee: Jiangsu Changfa Agricultural Equipment Co Ltd
Current assignee: Jiangsu Changfa Agricultural Equipment Co Ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-09-15
Anticipated expiration: 2029-12-19

Abstract

The utility model discloses a tractor speed change system and tractor, tractor speed change system includes: the reversing assembly, the main transmission assembly, the auxiliary transmission assembly and the crawling gear assembly are sequentially arranged; the main transmission assembly comprises a Lo clutch, a Hi clutch and a plurality of main transmission paths, and any main transmission path can be in transmission connection with the Lo clutch or the Hi clutch respectively; the Lo clutch is selectively in transmission connection with the forward gear driving gear or the reverse gear intermediate gear II; the Hi clutch is selectively in transmission connection with the forward gear driving gear or the reverse gear intermediate gear II; any main speed change transmission path is selectively in transmission connection with any auxiliary speed change transmission path; any main speed change transmission path is in transmission connection with any auxiliary speed change transmission path and then can be selectively in transmission connection with the crawling gear assembly. The utility model discloses a tractor has 64 and advances to keep off and 64 reverse to keep off 128 fender totally, whole speed change system compact structure, and transmission efficiency is high.

Description

Tractor speed change system and tractor

Technical Field

The utility model relates to a tractor variable speed technical field indicates a tractor speed change system and tractor especially.

Background

At present, the gear shifting of the domestic tractor transmission system mainly adopts a meshing sleeve or a synchronizer. When the gear is shifted, the main clutch needs to be separated, the power transmission of the tractor is cut off, and then the gear shifting and reversing operation is carried out through the operating lever. The mode is simple and reliable, and the manufacturing cost is low. However, the labor intensity of the driver is relatively large when the operation is frequently performed. Therefore, it is desirable to provide a novel shift and reverse operating system.

Disclosure of Invention

In order to simplify the operation of a driver and reduce the labor intensity of the driver, the utility model provides a tractor speed change system and a tractor, which realize that the tractor has 64 forward gears and 64 reverse gears which are 128 gears, and simultaneously has a plurality of power output and rotating speed combinations, thereby being convenient to realize four-wheel drive; and the whole speed change system has compact structure, high transmission efficiency and reasonable speed arrangement.

The utility model provides a technical scheme as follows:

a tractor transmission system comprising: the reversing assembly, the main transmission assembly, the auxiliary transmission assembly and the crawling gear assembly are sequentially arranged; the reversing assembly comprises an input shaft and a reverse gear intermediate shaft which are arranged in parallel; the input shaft is sleeved with a reverse gear driving gear and a forward gear driving gear in a free manner, and the input shaft is fixedly provided with a first selection mechanism which can be selectively connected with the reverse gear driving gear or the forward gear driving gear; the reverse gear middle shaft is fixedly provided with a reverse gear middle gear I and a reverse gear middle gear II; the first reverse gear intermediate gear is meshed with the reverse gear driving gear; the main transmission assembly comprises a low-gear clutch, a high-gear clutch and a plurality of main transmission paths, and any main transmission path can be in transmission connection with the low-gear clutch or the high-gear clutch respectively; the low-speed clutch is selectively in transmission connection with the forward driving gear or the reverse intermediate gear II; the high-speed clutch is selectively in transmission connection with the forward gear driving gear or the reverse gear intermediate gear II; the auxiliary transmission assembly is provided with a plurality of auxiliary transmission paths; any of said main transmission paths is selectively drivingly connected to any of said auxiliary transmission paths; any main speed change transmission path is in transmission connection with any auxiliary speed change transmission path and then can be selectively in transmission connection with the crawling gear assembly.

According to the technical scheme, when the tractor meets the condition that the farming resistance changes greatly in the operation process, the high gear and the low gear are switched through power gear shifting, and the running speed of the tractor can be changed. Meanwhile, the reversing assembly is arranged at the front end of the main transmission assembly, the reverse gear number is increased, and the speed range is wider. The utility model realizes the forward gear and the reverse gear of the tractor with the same number by compact space arrangement, and has a plurality of power output and rotation speed combinations, thereby conveniently realizing four-wheel drive; and the whole speed change system has compact structure, high transmission efficiency and reasonable speed arrangement. In practical application, the change of the running speed of the tractor can be realized by the driver through the high-low gear control button, so that the operation efficiency is improved, the operation intensity of the driver is reduced, the control comfort is improved, and the cost of the tractor is not increased too much.

Further, the main transmission assembly comprises a high-low gear spline shaft, a constant-meshing gear shaft II, a first shaft and a second shaft which are arranged in parallel; the high-low gear spline shaft is in transmission connection with the shaft; the high-low gear spline shaft is sleeved with a low-speed gear driven gear and a high-speed gear driven gear in a hollow manner; the normally meshed gear shaft II is provided with the low-gear clutch and the high-gear clutch; the normally meshed gear shaft II is sleeved with a low-speed driving gear corresponding to the low-speed clutch in a neutral mode, and the low-speed driving gear is meshed with the low-speed driven gear; the normally meshed gear shaft II is sleeved with a high-speed gear driving gear corresponding to the high-speed gear clutch in an idle mode, and the high-speed gear driving gear is meshed with the high-speed gear driven gear; the shaft is fixedly provided with N driving gears, wherein the nth driving gear is an N-gear driving gear; the two shafts are sleeved with N driven gears; the nth driven gear is an n-gear driven gear; the two shafts are fixedly provided with a selection mechanism which can be selectively connected with the n-gear driven gear or the (n-1) -gear driven gear, and each driven gear is correspondingly provided with one selection mechanism; the N-gear driving gear and the N-gear driven gear are correspondingly meshed and connected one by one to form N main transmission paths; wherein N, N are positive integers greater than 1, and N is less than or equal to N.

Further, a fourth-gear driving gear, a third-gear driving gear, a second-gear driving gear and a first-gear driving gear are sleeved on the first shaft in an idle mode; the two-shaft idle sleeve is provided with a four-gear driven gear, a three-gear driven gear, a two-gear driven gear and a one-gear driven gear; a second selection mechanism selectively connected with the fourth-gear driven gear or the third-gear driven gear and a third selection mechanism selectively connected with the second-gear driven gear or the first-gear driven gear are fixedly arranged on the second shaft; the four-gear driving gear and the four-gear driven gear are meshed and connected to form a main transmission path; the three-gear driving gear and the three-gear driven gear are meshed and connected to form a main transmission path; the two-gear driving gear is meshed and connected with the two-gear driven gear to form a main transmission path; the first gear driving gear and the first gear driven gear are meshed and connected to form a main transmission path.

In the technical scheme, the tractor realizes 128 gears comprising 64 forward gears and 64 reverse gears.

Further, the selection mechanism employs a synchronizer or a meshing sleeve.

Further, a middle gear is fixedly arranged on the normally meshed gear shaft II and is respectively meshed with the forward gear driving gear and the reverse gear middle gear II.

Further, the auxiliary transmission assembly comprises a first constant mesh gear shaft and an auxiliary transmission driven shaft; a normally meshed gear, a slow gear driving gear, a low gear driving gear and a middle gear driving gear are sleeved on the normally meshed gear shaft I in an idle mode; a two-shaft gear is fixedly arranged on the two shafts; the auxiliary transmission driven shaft is sleeved with a slow-gear driven gear, a low-gear driven gear and a medium-gear driven gear in a neutral mode; a fourth selection mechanism selectively connected with the second shaft gear or the slow gear driven gear and a fifth selection mechanism selectively connected with the low gear driven gear or the medium gear driven gear are fixedly arranged on the three shaft; the constant mesh gear is meshed and connected with the two-shaft gear to form a pair of variable transmission paths; the slow gear driving gear is meshed and connected with the slow gear driven gear to form a pair of variable speed transmission paths; the low-gear driving gear is meshed and connected with the low-gear driven gear to form a pair of variable speed transmission paths; the intermediate gear driving gear and the intermediate gear driven gear are meshed and connected to form a pair of variable transmission paths.

Further, the crawling gear assembly comprises a crawling gear shaft and a small bevel gear shaft; the crawling gear shaft is sleeved with a crawling gear driven gear I and a crawling gear driven gear II in a free manner; an auxiliary transmission driven gear is fixedly arranged on the auxiliary transmission driven shaft and is meshed with the crawling gear driven gear I; the small bevel gear shaft is fixedly provided with a crawling gear meshing sleeve; the small bevel gear shaft is sleeved with a crawling gear driven gear in an idle mode, and the crawling gear driven gear is meshed with the crawling gear driven gear II; the creep gear engaging sleeve is selectively connected with the auxiliary transmission driven gear or the creep gear driven gear.

Furthermore, the small bevel gear shaft is in transmission connection with a differential; the differential is in driving connection with the final drive assembly.

Furthermore, the small bevel gear shaft is in transmission connection with the transfer case assembly.

The utility model also provides a tractor, include: fuselage and any one above-mentioned tractor variable speed system.

Compared with the prior art, this tractor speed change system and tractor beneficial effect lie in:

(1) the utility model realizes 128 gears of 64 forward gears and 64 reverse gears of the tractor by compact space arrangement, and has various power output and rotation speed combinations, thereby conveniently realizing four-wheel drive; and the whole speed change system has compact structure, high transmission efficiency and reasonable speed arrangement. Meanwhile, the reversing assembly is arranged at the front end of the main transmission assembly, the reverse gear number is increased, and the speed range is wider. In practical application, when the tractor meets the condition that the farming resistance changes greatly in the operation process, the change of the running speed of the tractor can be realized by shifting gears through power to realize the switching of high gear and low gear, so that the operation efficiency is improved, the operation intensity of a driver is reduced, the operation comfort is improved, and the cost of the tractor is not increased too much.

(2) The utility model discloses an arrange certain drive disk assembly through with one of them assembly between each assembly (switching-over assembly, main gear assembly, auxiliary transmission assembly and the fender assembly of crawling on certain part of another assembly (set up in the biax of main gear assembly, the auxiliary transmission driven gear who keeps off the assembly crawls and locates constant mesh gear axle etc. like two shaft gear of auxiliary transmission assembly), simplified the transmission route between each assembly greatly to this speed change system's compact structure nature and transmission high efficiency have further been improved.

Drawings

The above features, technical features, advantages and modes of realisation of a tractor transmission system and tractor will be further described in the following, in a clearly understandable manner, with reference to the accompanying drawings, which illustrate preferred embodiments.

Fig. 1 is a schematic structural view of an embodiment of the tractor transmission system of the present invention.

The reference numbers illustrate:

01. an input shaft, 1, a reverse gear driving gear, 1A, a selection mechanism I, 2, a forward gear driving gear, 3, a low-speed gear driven gear, 4, a high-speed gear driven gear, 5, a fourth-gear driving gear, 6, a third-gear driving gear, 7, a second-gear driving gear, 8, a first-gear driving gear, 9, a normally meshed gear, 10, a slow-gear driving gear, 11, a low-gear driving gear, 12, a middle-gear driving gear, 13, a creep-gear driven gear I, 14, a creep-gear driven gear II, 15, a reverse-gear intermediate gear I, 16, a normally meshed gear shaft II, 17, a reverse-gear intermediate gear II, 18, a low-speed gear driving gear, 19, a high-speed gear driving gear, 20, a fourth-gear driven gear, 21, a selection mechanism II, 22, a third-gear driven gear, 23, a second-gear driven gear, 24, a selection mechanism III, 25, a first-gear driven gear, 28. the low-gear transmission mechanism comprises a slow-gear driven gear, 29, a low-gear driven gear, 30, a selection mechanism V, 31, a middle-gear driven gear, 32, an auxiliary transmission driven gear, 33, a creep gear meshing sleeve, 34, a creep gear driven gear, B, a low-gear clutch, C, a high-gear clutch, D, a transfer case assembly, E, a power output assembly and F, a final transmission assembly.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

For the sake of simplicity, only the parts relevant to the present invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one". In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted", "connected" and "fixedly connected" are to be understood in a broad sense, e.g. fixedly, detachably or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

In an embodiment of the present invention, as shown in fig. 1, a tractor transmission system includes: the reversing assembly, the main transmission assembly, the auxiliary transmission assembly and the crawling gear assembly are sequentially arranged; the reversing assembly comprises an input shaft 01 and a reverse gear intermediate shaft which are arranged in parallel; the input shaft 01 is sleeved with a reverse gear driving gear 1 and a forward gear driving gear 2 in a hollow manner, and the input shaft 01 is fixedly provided with a reverse gear driving gear 1A which can be selectively connected with the reverse gear driving gear 1 or the forward gear driving gear 2; the reverse gear intermediate shaft is fixedly provided with a reverse gear intermediate gear I15 and a reverse gear intermediate gear II 17; the first reverse gear intermediate gear 15 is meshed with the reverse gear driving gear 1; the main transmission assembly comprises a low-gear clutch B, a high-gear clutch C and a plurality of main transmission paths, and any main transmission path can be in transmission connection with the low-gear clutch B or the high-gear clutch C respectively; the low-speed clutch B is selectively in transmission connection with the forward driving gear 2 or the reverse intermediate gear II 17; the high-speed clutch C is selectively in transmission connection with the forward gear driving gear 2 or the reverse gear intermediate gear II 17; the auxiliary transmission assembly is provided with a plurality of auxiliary transmission paths; any main speed change transmission path is selectively in transmission connection with any auxiliary speed change transmission path; after being in transmission connection with any auxiliary variable speed transmission path, any main variable speed transmission path can be selectively in transmission connection with the crawling gear assembly; preferably, the main speed changing assembly comprises high and low gear spline shafts, a second constant meshing gear shaft 16, a first shaft and a second shaft which are arranged in parallel; the high-low gear spline shaft is in transmission connection with a shaft; the high-low gear spline shaft is sleeved with a low-low gear driven gear 3 and a high-speed gear driven gear 4 in a hollow manner; the normally meshed gear shaft II 16 is provided with a low-gear clutch B and a high-gear clutch C; a normally meshed gear shaft II 16 is sleeved with a low-speed driving gear 18 corresponding to the low-speed clutch B in a neutral mode, and the low-speed driving gear 18 is meshed with the low-speed driven gear 3; a second normally meshed gear shaft 16 is sleeved with a high-speed gear driving gear 19 corresponding to the high-speed gear clutch C in a free manner, and the high-speed gear driving gear 19 is meshed with the high-speed gear driven gear 4; n driving gears are fixedly arranged on one shaft, wherein the nth driving gear is an N-gear driving gear; the two shafts are sleeved with N driven gears; the nth driven gear is an n-gear driven gear; the two shafts are fixedly provided with a selection mechanism which can be selectively connected with the n-gear driven gear or the (n-1) -gear driven gear, and each driven gear is correspondingly provided with a selection mechanism; the N-gear driving gears and the N-gear driven gears are correspondingly meshed and connected one by one to form N main transmission paths; wherein N, N are positive integers greater than 1, and N is less than or equal to N. It is worth to be noted that, when a selection mechanism is arranged between the N-gear driven gear and the (N-1) gear driven gear, the (N-1) gear driven gear and the (N-2) gear driven gear do not need to be provided with the selection mechanism, but a selection mechanism is arranged between the (N-2) gear driven gear and the (N-3) gear driven gear, wherein N, N are positive integers greater than 3, and N is less than or equal to N. Preferably, the selection mechanism employs a synchronizer or an engagement sleeve.

Illustratively, a shaft is sleeved with a four-gear driving gear 5, a three-gear driving gear 6, a two-gear driving gear 7 and a one-gear driving gear 8; the second shaft is sleeved with a four-gear driven gear 20, a three-gear driven gear 22, a two-gear driven gear 23 and a first-gear driven gear 25 in an empty mode; a second selection mechanism 21 selectively connected with the fourth-gear driven gear 20 or the third-gear driven gear 22 and a third selection mechanism 24 selectively connected with the second-gear driven gear 23 or the first-gear driven gear 25 are fixedly arranged on the second shaft; the four-gear driving gear 5 is meshed and connected with the four-gear driven gear 20 to form a main transmission path; the three-gear driving gear 6 is meshed and connected with the three-gear driven gear 22 to form a main transmission path; the second-gear driving gear 7 is meshed and connected with the second-gear driven gear 23 to form a main transmission path; the first gear driving gear 8 and the first gear driven gear 25 are meshed and connected to form a main transmission path. Further, a second normally meshed gear shaft 16 is fixedly provided with an intermediate gear, and the intermediate gear is respectively meshed and connected with the forward gear driving gear 2 and the second reverse gear intermediate gear 17.

Preferably, the auxiliary transmission assembly comprises a first constant mesh gear shaft and an auxiliary transmission driven shaft; a constant meshed gear 9, a slow gear driving gear 10, a low gear driving gear 11 and a middle gear driving gear 12 are sleeved on the first constant meshed gear shaft in an idle mode; a two-shaft gear 26 is fixedly arranged on the two shafts; the auxiliary transmission driven shaft is sleeved with a slow-gear driven gear 28, a low-gear driven gear 29 and a medium-gear driven gear 31 in a neutral mode; a fourth selection mechanism 27 selectively connected with the second shaft gear 26 or the slow gear driven gear 28, and a fifth selection mechanism 30 selectively connected with the low gear driven gear 29 or the medium gear driven gear 31 are fixedly arranged on the three shafts; the constant mesh gear 9 is meshed and connected with the double-shaft gear 26 to form a pair of variable speed transmission paths; the slow gear driving gear 10 is meshed with the slow gear driven gear 28 to form a pair of variable speed transmission paths; the low-gear driving gear 11 is meshed and connected with the low-gear driven gear 29 to form a pair of speed change transmission paths; the middle gear driving gear 12 is meshed and connected with the middle gear driven gear 31 to form a pair of variable transmission paths; preferably, the creeper gear assembly comprises a creeper gear shaft and a small bevel gear shaft; the crawling gear shaft is sleeved with a crawling gear driven gear I13 and a crawling gear driven gear II 14 in a non-slip manner; an auxiliary transmission driven gear 32 is fixedly arranged on the auxiliary transmission driven shaft, and the auxiliary transmission driven gear 32 is meshed with the first crawling gear driven gear 13; a crawling gear meshing sleeve 33 is fixedly arranged on the small bevel gear shaft; a crawling gear driven gear 34 is sleeved on the small bevel gear shaft in an empty mode, and the crawling gear driven gear 34 is in meshed connection with the crawling gear driven gear II 14; the creep speed engaging sleeve 33 is selectively connected with the auxiliary transmission driven gear 32 or the creep speed driven gear 34; preferably, the bevel gear end of the small bevel gear shaft is in transmission connection with a differential; the differential is in transmission connection with the final drive assembly F. In practical application, a driver can change the running speed of the tractor through a high-low gear control button (namely a low-speed gear clutch B and a high-speed gear clutch C), so that the operation efficiency is improved, the operation intensity of the driver is reduced, and the control comfort is improved. Preferably, the selection mechanisms (selection mechanism one 1A, selection mechanism two 21, selection mechanism three 24, selection mechanism four 27, selection mechanism five 30) are synchronizers, but of course, the selection mechanisms can also be meshing sleeves.

In another embodiment of the present invention, as shown in fig. 1, the difference from the above embodiment is that a certain transmission component of one assembly is not disposed on a certain component of another assembly (for example, the two-shaft gear of the auxiliary transmission assembly is disposed on the two shafts of the main transmission assembly, the auxiliary transmission driven gear of the crawling gear assembly is disposed on the constant mesh gear shaft, etc.), and two assemblies in transmission connection can also be in transmission connection through the gear pair, so that the component of each assembly is not disposed on a certain component of another assembly. But also fall within the scope of the present invention.

In another embodiment of the present invention, as shown in fig. 1, on the basis of the above embodiment, a shaft of the high-low gear spline shaft is connected through the spline structure, specifically, the high-low gear spline shaft is coaxially disposed with a shaft, and the end cover of the high-low gear spline shaft near one side of the shaft is provided with a bearing, and the inner wall of the bearing is connected with the outer side wall of the shaft through the spline structure. Of course, in another embodiment, the high-low gear spline shaft can also be directly connected with a shaft through a spline structure. The high-low gear spline shaft and the shaft can also be the same shaft. Further, the input shaft and the high-low gear spline shaft are coaxially arranged and are connected through a spline structure. Furthermore, two ends of the input shaft, the reverse gear intermediate shaft, the high-low gear spline shaft, the first shaft, the second constant mesh gear shaft, the second shaft, the first constant mesh gear shaft, the auxiliary variable speed driven shaft, the crawling gear shaft and the small bevel gear shaft are respectively sleeved with a bearing, so that the abrasion of each shaft piece is reduced, and the service life of each shaft piece is prolonged. Further, the input shaft, the high-low gear spline shaft, the first shaft, the constant meshed gear shaft I and the crawling gear shaft are coaxially arranged; the second constant-meshed gear shaft, the second shaft, the auxiliary variable speed driven shaft and the small bevel gear shaft are coaxially arranged; make whole this transmission system only need arrange three parallel arrangement's shafting (with the coaxial a plurality of axles that set up of input shaft, with two coaxial a plurality of axles that set up of constant mesh gear axle, reverse gear jackshaft) can, the structure is very compact and transmission efficiency is high, the simple operation.

In another embodiment of the present invention, as shown in fig. 1, on the basis of the above embodiment, the small bevel gear shaft is in transmission connection with the transfer case assembly D.

In another embodiment of the present invention, as shown in fig. 1, on the basis of the above embodiment, a power output assembly E is further included.

Exemplarily, as shown in fig. 1, the selection mechanisms of the reversing assembly, the main transmission assembly and the auxiliary transmission assembly of the transmission system all adopt synchronizers, the crawling gear assembly adopts a meshing sleeve shifting structure, and the clutches (the low-gear clutch B and the high-gear clutch C) are wet multi-plate clutches controlled by electro-hydraulic fluid; the low-speed gear driven gear 3 and the high-speed gear driven gear 4 are of an integral structure or are connected by a connecting piece to form an integral structure; the four-gear driving gear 5, the three-gear driving gear 6, the two-gear driving gear 7 and the one-gear driving gear 8 are of an integral structure or are connected by connecting pieces to form an integral structure; the normally meshed gear 9, the slow gear driving gear 10, the low gear driving gear 11 and the middle gear driving gear 12 are of an integral structure or are connected by connecting pieces to form an integral structure; the first crawling gear driven gear 13 and the second crawling gear driven gear 14 are of an integral structure or are connected through a connecting piece to form an integral structure; the two-shaft and two-shaft gear 26 is an integral structure or is connected by a connecting piece to form an integral structure; the first normally meshed gear shaft and the normally meshed gear 9 are of an integral structure or are connected through a connecting piece to form an integral structure; the change of the running speed of the tractor can be realized by the high-low gear operating button, the 128 gears comprising 64 forward gears and 64 reverse gears can be realized in a compact spatial step, and meanwhile, various power output speed combinations of 540/760/1000 rpm can be realized, and four-wheel drive can be conveniently realized. The specific transmission path is as follows:

forward gear transmission route:

(one) transmission line without hanging crawling device

1. Gear i forward (low gear-high gear): the input shaft 01 → the first selection mechanism 1A → the forward drive gear 2 press → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the first drive gear 8 → the first driven gear 25 → the selection mechanism three 24 → the second shaft → the selection mechanism four 27 → the sub-transmission driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

2. Gear ii forward (low gear-high gear): the input shaft 01 → the first selector mechanism 1A → the forward drive gear 2 press → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the second drive gear 7 → the second driven gear 23 → the selector mechanism three 24 → the second shaft → the selector mechanism four 27 → the sub-transmission driven shaft → the creep speed engaging sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

3. Gear iii forward (low gear-high gear): the input shaft 01 → the first selection mechanism 1A → the forward drive gear 2 press → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second shaft → the fourth selection mechanism 27 → the sub-transmission driven shaft → the creep-gear engaging sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

4. Forward gear in gear iv (low gear-high gear): the input shaft 01 → the first selector mechanism 1A → the forward drive gear 2 press → the second normally engaged gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the fourth drive gear 5 → the fourth driven gear 20 → the second selector mechanism 21 → the second shaft → the fourth selector mechanism 27 → the sub-transmission driven shaft (32) → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

5. Gear i forward (low-medium speed): the input shaft 01 → the first selection mechanism 1A → the forward drive gear 2 press → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the first drive gear 8 → the first driven gear 25 → the selection mechanism three 24 → the second shaft → the normally engaged gear 9 → the middle drive gear 12 → the middle driven gear 31 → the selection mechanism five 30 → the sub-transmission driven shaft → the creep gear sleeve 33 → the pinion shaft → the differential → the final drive assembly F.

6. Gear ii forward (low-medium speed): the input shaft 01 → the first selector mechanism 1A → the forward drive gear 2 press → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the second drive gear 7 → the second driven gear 23 → the selector mechanism three 24 → the second shaft gear 26 → the normally engaged gear 9 → the intermediate drive gear 12 → the intermediate driven gear 31 → the selector mechanism five 30 → the sub-transmission driven shaft → the creep-shift engaging sleeve 33 → the pinion shaft → the differential → the final drive assembly F.

7. Gear iii forward (low-medium speed): the input shaft 01 → the first selection mechanism 1A → the forward drive gear 2 press → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the middle drive gear 12 → the middle driven gear 31 → the fifth selection mechanism 30 → the counter-speed driven shaft → the creep-speed engaging sleeve 33 → the pinion shaft → the differential → the final drive assembly F.

8. Forward gear of iv gear (low gear-medium speed): the input shaft 01 → the first selection mechanism 1A → the forward drive gear 2 press → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the fourth-speed drive gear 5 → the fourth-speed driven gear 20 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the middle-speed drive gear 12 → the middle-speed driven gear 31 → the fifth selection mechanism 30 → the counter-speed driven shaft → the creep-speed engaging sleeve 33 → the pinion shaft → the differential → the final drive assembly F.

9. Gear i forward (low gear-low speed): the input shaft 01 → the first selector mechanism 1A → the forward drive gear 2 press → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the second drive gear 7 → the second driven gear 23 → the selector mechanism three 24 → the second shaft gear 26 → the normally engaged gear 9 → the low-speed drive gear 11 → the low-speed driven gear 29 → the selector mechanism five 30 → the sub-transmission driven shaft → the creep-speed engaging sleeve 33 → the pinion shaft → the differential → the final drive assembly F.

10. Gear ii forward (low gear-low speed): the input shaft 01 → the first selector mechanism 1A → the forward drive gear 2 press → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the second drive gear 7 → the second driven gear 23 → the selector mechanism three 24 → the second shaft gear 26 → the normally engaged gear 9 → the low-speed drive gear 11 → the low-speed driven gear 29 → the selector mechanism five 30 → the sub-transmission driven shaft → the creep-speed engaging sleeve 33 → the pinion shaft → the differential → the final drive assembly F.

11. Gear iii forward (low gear-low speed): the input shaft 01 → the first selection mechanism 1A → the forward drive gear 2 press → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the low-speed drive gear 11 → the low-speed driven gear 29 → the fifth selection mechanism 30 → the counter-speed driven shaft → the creep-speed engaging sleeve 33 → the pinion shaft → the differential → the final drive assembly F.

12. Forward gear of iv gear (low gear-low speed): the input shaft 01 → the first selection mechanism 1A → the forward drive gear 2 press → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the fourth drive gear 5 → the fourth driven gear 20 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the low-speed drive gear 11 → the low-speed driven gear 29 → the fifth selection mechanism 30 → the counter-speed driven shaft → the creep-speed engaging sleeve 33 → the pinion shaft → the differential → the final drive assembly F.

13. Gear i forward (low gear-slow speed): the input shaft 01 → the selection mechanism one 1A → the forward drive gear 2 press → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the first-speed drive gear 8 → the first-speed driven gear 25 → the selection mechanism three 24 → the second shaft gear 26 → the normally engaged gear 9 → the slow drive gear 10 → the slow driven gear 28 → the selection mechanism four 27 → the sub-transmission driven shaft → the creep-speed engaging sleeve 33 → the pinion shaft → the differential → the final drive assembly F.

14. Gear ii forward (low gear-slow speed): the input shaft 01 → the first selector mechanism 1A → the forward drive gear 2 press → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the second drive gear 7 → the second driven gear 23 → the selector mechanism three 24 → the second shaft gear 26 → the normally engaged gear 9 → the slow drive gear 10 → the slow driven gear 28 → the selector mechanism four 27 → the sub-transmission driven shaft → the creep-speed engaging sleeve 33 → the pinion shaft → the differential → the final drive assembly F.

15. Gear iii forward (low gear-slow speed): the input shaft 01 → the first selection mechanism 1A → the forward drive gear 2 press → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the slow drive gear 10 → the slow driven gear 28 → the fourth selection mechanism 27 → the counter-speed driven shaft → the creep-speed engaging sleeve 33 → the pinion shaft → the differential → the final drive assembly F.

16. Forward gear of iv gear (low gear-slow speed): the input shaft 01 → the first selection mechanism 1A → the forward drive gear 2 press → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the fourth drive gear 5 → the fourth driven gear 20 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the slow drive gear 10 → the slow driven gear 28 → the fourth selection mechanism 27 → the counter-speed driven shaft → the creep-speed engaging sleeve 33 → the pinion shaft → the differential → the final drive assembly F.

17. First gear forward gear (high gear-high speed): the input shaft 01 → the first selection mechanism 1A → the forward drive gear 2 press → the second constant mesh gear shaft 16 → the high-speed clutch C → the high-speed drive gear 19 → the high-speed driven gear 4 → the first drive gear 8 → the first driven gear 25 → the third selection mechanism 24 → the second shaft → the fourth selection mechanism 27 → the sub-transmission driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

18. Forward gear of second gear (high gear-high speed): the input shaft 01 → the first selector mechanism 1A → the first forward drive gear 2 press → the second constant mesh gear shaft 16 → the high-speed clutch C → the high-speed drive gear 19 → the high-speed driven gear 4 → the second drive gear 7 → the second driven gear 23 → the third selector mechanism 24 → the second shaft → the fourth selector mechanism 27 → the sub-transmission driven shaft → the creep speed engaging sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

19. Forward gear iii (high gear-high speed): the input shaft 01 → the first selection mechanism 1A → the first forward gear drive gear 2 press → the second constant mesh gear shaft 16 → the high gear clutch C → the high gear drive gear 19 → the high gear driven gear 4 → the third gear drive gear 6 → the third gear driven gear 22 → the second selection mechanism 21 → the second shaft → the fourth selection mechanism 27 → the sub-transmission driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

20. Iv forward gear (high gear-high speed): the input shaft 01 → the first selection mechanism 1A → the first forward gear drive gear 2 press → the second constant mesh gear shaft 16 → the high gear clutch C → the high gear drive gear 19 → the high gear driven gear 4 → the fourth gear drive gear 5 → the fourth gear driven gear 20 → the second selection mechanism 21 → the second shaft → the fourth selection mechanism 27 → the sub-transmission driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

21. Gear i forward (high gear-medium speed): the input shaft 01 → the first selection mechanism 1A → the drive gear for forward gear 2 press → the second normally engaged gear shaft 16 → the high-speed gear clutch C → the drive gear for high-speed gear 19 → the driven gear for high-speed gear 4 → the drive gear for first gear 8 → the driven gear for first gear 25 → the third selection mechanism 24 → the second shaft gear 26 → the normally engaged gear 9 → the drive gear for middle gear 12 → the driven gear for middle gear 31 → the fifth selection mechanism 30 → the driven shaft for sub-transmission → the engaging sleeve for creep gear 33 → the pinion shaft → the differential → the final drive assembly F.

22. Gear ii forward (high-speed gear — medium speed): the input shaft 01 → the first selector mechanism 1A → the first forward gear drive gear 2 press → the second normally engaged gear shaft 16 → the high-speed gear clutch C → the high-speed gear drive gear 19 → the high-speed gear driven gear 4 → the second drive gear 7 → the second secondary driven gear 23 → the third selector mechanism 24 → the second shaft gear 26 → the normally engaged gear 9 → the middle gear drive gear 12 → the middle gear driven gear 31 → the fifth selector mechanism 30 → the secondary transmission driven shaft → the second creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

23. Gear iii forward (high gear-medium speed): the input shaft 01 → the first selection mechanism 1A → the first forward gear drive gear 2 press → the second constant mesh gear shaft 16 → the high gear clutch C → the high gear drive gear 19 → the high gear driven gear 4 → the third gear drive gear 6 → the third gear driven gear 22 → the second selection mechanism 21 → the second shaft gear 26 → the constant mesh gear 9 → the middle gear drive gear 12 → the middle gear driven gear 31 → the fifth selection mechanism 30 → the second transmission driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

24. Iv forward gear (high-speed gear — medium speed): the input shaft 01 → the first selector gear 1A → the first forward gear drive gear 2 press → the second constant mesh gear shaft 16 → the high gear clutch C → the high gear drive gear 19 → the high gear driven gear 4 → the fourth gear drive gear 5 → the fourth gear driven gear 20 → the second selector gear 21 → the second shaft gear 26 → the constant mesh gear 9 → the middle gear drive gear 12 → the middle gear driven gear 31 → the fifth selector gear 30 → the second shift driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

25. First gear forward gear (high gear-low gear): the input shaft 01 → the first selector mechanism 1A → the first forward gear drive gear 2 press → the second normally engaged gear shaft 16 → the high-speed gear clutch C → the high-speed gear drive gear 19 → the high-speed gear driven gear 4 → the second drive gear 7 → the second secondary driven gear 23 → the third selector mechanism 24 → the second shaft gear 26 → the normally engaged gear 9 → the low-speed gear drive gear 11 → the low-speed driven gear 29 → the fifth selector mechanism 30 → the secondary transmission driven shaft → the second creep gear sleeve 33 → the pinion shaft → the differential → the final drive assembly F.

26. Forward gear of second gear (high gear-low gear): the input shaft 01 → the first selector mechanism 1A → the first forward gear drive gear 2 press → the second normally engaged gear shaft 16 → the high-speed gear clutch C → the high-speed gear drive gear 19 → the high-speed gear driven gear 4 → the second drive gear 7 → the second secondary driven gear 23 → the third selector mechanism 24 → the second shaft gear 26 → the normally engaged gear 9 → the low-speed gear drive gear 11 → the low-speed driven gear 29 → the fifth selector mechanism 30 → the secondary transmission driven shaft → the second creep gear sleeve 33 → the pinion shaft → the differential → the final drive assembly F.

27. Forward gear iii (high gear-low gear): the input shaft 01 → the first selection mechanism 1A → the drive gear for forward gear 2 press → the second normally engaged gear shaft 16 → the high-speed clutch C → the drive gear for high-speed gear 19 → the driven gear for high-speed gear 4 → the drive gear for third gear 6 → the driven gear for third gear 22 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the drive gear for low gear 11 → the driven gear for low gear 29 → the fifth selection mechanism 30 → the driven shaft for sub-transmission → the engaging sleeve for creep gear 33 → the pinion shaft → the differential → the final drive assembly F.

28. Iv forward gear (high gear-low gear): the input shaft 01 → the first selector mechanism 1A → the first forward gear drive gear 2 press → the second normally engaged gear shaft 16 → the high-speed gear clutch C → the high-speed gear drive gear 19 → the high-speed gear driven gear 4 → the fourth gear drive gear 5 → the fourth gear driven gear 20 → the second selector mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the low gear drive gear 11 → the low gear driven gear 29 → the fifth selector mechanism 30 → the second transmission driven shaft → the creep gear sleeve 33 → the pinion shaft → the differential → the final drive assembly F.

29. First gear forward gear (high gear-low gear): the input shaft 01 → the first selection mechanism 1A → the drive gear for forward gear 2 press → the second normally engaged gear shaft 16 → the high-speed clutch C → the drive gear for high-speed gear 19 → the driven gear for high-speed gear 4 → the drive gear for first gear 8 → the driven gear for first gear 25 → the third selection mechanism 24 → the second shaft gear 26 → the normally engaged gear 9 → the drive gear for slow gear 10 → the driven gear for slow gear 28 → the fourth selection mechanism 27 → the driven shaft for sub-transmission → the engaging sleeve for creep gear 33 → the pinion shaft → the differential → the final drive assembly F.

30. Forward gear of second gear (high gear-low gear): the input shaft 01 → the first selector mechanism 1A → the first forward gear drive gear 2 press → the second normally engaged gear shaft 16 → the high-speed gear clutch C → the high-speed gear drive gear 19 → the high-speed gear driven gear 4 → the second drive gear 7 → the second secondary driven gear 23 → the third selector mechanism 24 → the second shaft gear 26 → the normally engaged gear 9 → the slow gear drive gear 10 → the slow gear driven gear 28 → the fourth selector mechanism 27 → the secondary transmission driven shaft → the second creep gear sleeve 33 → the pinion shaft → the differential → the final drive assembly F.

31. Forward gear iii (high gear-low gear): the input shaft 01 → the first selection mechanism 1A → the first forward gear drive gear 2 press → the second constant mesh gear shaft 16 → the high gear clutch C → the high gear drive gear 19 → the high gear driven gear 4 → the third gear drive gear 6 → the third gear driven gear 22 → the second selection mechanism 21 → the second shaft gear 26 → the constant mesh gear 9 → the slow gear drive gear 10 → the slow gear driven gear 28 → the fourth selection mechanism 27 → the second shift driven shaft → the creep gear sleeve 33 → the pinion shaft → the differential → the final drive assembly F.

32. Iv forward gear (high gear-low gear): input shaft 01 → selection mechanism one 1A → forward range drive gear 2 press → normally engaged gear shaft two 16 → high range clutch C → high range drive gear 19 → high range driven gear 4 → fourth range drive gear 5 → fourth range driven gear 20 → selection mechanism two 21 → second shaft gear 26 → normally engaged gear 9 → slow range drive gear 10 → slow range driven gear 28 → selection mechanism four 27 → sub-transmission driven shaft → creep range engaged sleeve 33 → small bevel gear shaft → differential → final stage

Transmission line of hanging crawling device

1. First gear forward gear (high gear-high speed): input shaft 01 → selection mechanism one 1A → forward drive gear 2 press → normally meshed gear shaft two 16 → high gear clutch C → high gear drive gear 19 → high gear driven gear 4 → first gear drive gear 8 → first gear driven gear 25 → selection mechanism three 24 → two shafts → selection mechanism four 27 → sub-transmission driven gear 32 → creep gear driven gear one 13 → creep gear driven gear two 14 → creep gear driven gear 34 → creep gear sleeve 33 → pinion shaft → differential → final drive assembly F.

2. Forward gear of second gear (high gear-high speed): the input shaft 01 → the first selection mechanism 1A → the first forward drive gear 2 press → the second constant mesh gear shaft 16 → the high-speed clutch C → the high-speed drive gear 19 → the high-speed driven gear 4 → the second drive gear 7 → the second driven gear 23 → the third selection mechanism 24 → the second shaft → the fourth selection mechanism 27 → the sub-transmission driven gear 32 → the first creep gear driven gear 13 → the second creep gear driven gear 14 → the creep gear driven gear 34 → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

3. Forward gear iii (high gear-high speed): the input shaft 01 → the first selector gear 1A → the drive gear for forward gear 2 press → the second normally meshed gear shaft 16 → the high gear clutch C → the drive gear for high gear 19 → the driven gear for high gear 4 → the drive gear for third gear 6 → the driven gear for third gear 22 → the third selector gear 24 → the second shaft → the fourth selector gear 27 → the driven gear for sub-transmission 32 → the first driven gear for creep gear 13 → the driven gear for creep gear two 14 → the driven gear for creep gear 34 → the meshing sleeve for creep gear 33 → the pinion shaft → the differential → the final drive assembly F.

4. Iv forward gear (high gear-high speed): the input shaft 01 → the first selector gear 1A → the drive gear for forward gear 2 press → the second normally meshed gear shaft 16 → the high gear clutch C → the drive gear for high gear 19 → the driven gear for high gear 4 → the drive gear for fourth gear 5 → the driven gear for fourth gear 20 → the third selector gear 24 → the second shaft → the fourth selector gear 27 → the driven gear for sub-transmission 32 → the first driven gear for creep gear 13 → the driven gear for creep gear two 14 → the driven gear for creep gear 34 → the meshing sleeve for creep gear 33 → the pinion shaft → the differential → the final drive assembly F.

5. Gear i forward (high gear-medium speed): input shaft 01 → first selection mechanism 1A → driving gear for forward gear 2 press → second normally engaged gear shaft 16 → clutch for high gear C → driving gear for high gear 19 → driven gear for high gear 4 → driving gear for first gear 8 → driven gear for first gear 25 → third selection mechanism 24 → second shaft gear 26 → normally engaged gear 9 → driving gear for middle gear 12 → driven gear for middle gear 31 → fifth selection mechanism 30 → driven gear for counter gear 32 → driven gear for creep gear one 13 → driven gear for creep gear two 14 → driven gear for creep gear 34 → meshing sleeve for creep gear 33 → pinion shaft → differential → final drive assembly F.

6. Gear ii forward (high-speed gear — medium speed): the input shaft 01 → the first selection mechanism 1A → the drive gear for forward gear 2 press → the second normally engaged gear shaft 16 → the high gear clutch C → the drive gear for high gear 19 → the driven gear for high gear 4 → the drive gear for second gear 7 → the driven gear for second gear 23 → the third selection mechanism 24 → the second shaft gear 26 → the normally engaged gear 9 → the drive gear for middle gear 12 → the driven gear for middle gear 31 → the fifth selection mechanism 30 → the driven gear for sub-transmission 32 → the driven gear for creep gear one 13 → the driven gear for creep gear two 14 → the driven gear for creep gear 34 → the engaging sleeve for creep gear 33 → the pinion shaft → the differential → the final drive assembly F.

7. Gear iii forward (high gear-medium speed): the input shaft 01 → the first selection mechanism 1A → the drive gear for forward gear 2 press → the second normally engaged gear shaft 16 → the high-speed gear clutch C → the drive gear for high-speed gear 19 → the driven gear for high-speed gear 4 → the drive gear for third gear 6 → the driven gear for third gear 22 → the selection mechanism three 24 → the second shaft gear 26 → the normally engaged gear 9 → the drive gear for middle gear 12 → the driven gear for middle gear 31 → the selection mechanism five 30 → the driven gear for sub-transmission 32 → the driven gear for creep gear one 13 → the driven gear for creep gear two 14 → the driven gear for creep gear 34 → the engaging sleeve for creep gear 33 → the small bevel gear shaft → the differential → the final drive assembly F.

8. Iv forward gear (high-speed gear — medium speed): input shaft 01 → first selection mechanism 1A → driving gear for forward gear 2 press → second normally engaged gear shaft 16 → clutch for high gear C → driving gear for high gear 19 → driven gear for high gear 4 → driving gear for fourth gear 5 → driven gear for fourth gear 20 → third selection mechanism 24 → second shaft gear 26 → normally engaged gear 9 → driving gear for middle gear 12 → driven gear for middle gear 31 → fifth selection mechanism 30 → driven gear for counter gear 32 → driven gear for creep gear one 13 → driven gear for creep gear two 14 → driven gear for creep gear 34 → meshing sleeve for creep gear 33 → pinion shaft → differential → final drive assembly F.

9. First gear forward gear (high gear-low gear): the input shaft 01 → the first selection mechanism 1A → the drive gear for forward range 2 press → the second normally engaged gear shaft 16 → the high range clutch C → the drive gear for high range 19 → the driven gear for high range 4 → the drive gear for first range 8 → the driven gear for first range 25 → the third selection mechanism 24 → the second shaft gear 26 → the normally engaged gear 9 → the drive gear for low range 11 → the driven gear for low range 29 → the fifth selection mechanism 30 → the driven gear for sub-transmission 32 → the driven gear for creep range one 13 → the driven gear for creep range two 14 → the driven gear for creep range 34 → the engaging sleeve for creep range 33 → the pinion shaft → the differential → the final drive assembly F.

10. Forward gear of second gear (high gear-low gear): the input shaft 01 → the first selection mechanism 1A → the drive gear for forward gear 2 press → the second normally engaged gear shaft 16 → the high gear clutch C → the drive gear for high gear 19 → the driven gear for high gear 4 → the drive gear for second gear 7 → the driven gear for second gear 23 → the third selection mechanism 24 → the second shaft gear 26 → the normally engaged gear 9 → the drive gear for low gear 11 → the driven gear for low gear 29 → the fifth selection mechanism 30 → the driven gear for sub-transmission 32 → the driven gear for creep gear one 13 → the driven gear for creep gear two 14 → the driven gear for creep gear 34 → the engaging sleeve for creep gear 33 → the pinion shaft → the differential → the final drive assembly F.

11. Forward gear iii (high gear-low gear): the input shaft 01 → the first selection mechanism 1A → the drive gear for forward gear 2 press → the second normally engaged gear shaft 16 → the high gear clutch C → the drive gear for high gear 19 → the driven gear for high gear 4 → the drive gear for third gear 6 → the driven gear for third gear 22 → the third selection mechanism 24 → the second shaft gear 26 → the normally engaged gear 9 → the drive gear for low gear 11 → the driven gear for low gear 29 → the fifth selection mechanism 30 → the driven gear for sub-transmission 32 → the driven gear for creep gear one 13 → the driven gear for creep gear two 14 → the driven gear for creep gear 34 → the engaging sleeve for creep gear 33 → the pinion shaft → the differential → the final drive assembly F.

12. Iv forward gear (high gear-low gear): the input shaft 01 → the first selection mechanism 1A → the drive gear for forward gear 2 press → the second normally engaged gear shaft 16 → the high gear clutch C → the drive gear for high gear 19 → the driven gear for high gear 4 → the drive gear for fourth gear 5 → the driven gear for fourth gear 20 → the third selection mechanism 24 → the second shaft gear 26 → the normally engaged gear 9 → the drive gear for low gear 11 → the driven gear for low gear 29 → the fifth selection mechanism 30 → the driven gear for sub-transmission 32 → the driven gear for creep gear one 13 → the driven gear for creep gear two 14 → the driven gear for creep gear 34 → the engaging sleeve for creep gear 33 → the pinion shaft → the differential → the final drive assembly F.

13. First gear forward gear (high gear-low gear): the input shaft 01 → the first selection mechanism 1A → the drive gear for forward range 2 press → the second normally engaged gear shaft 16 → the high range clutch C → the drive gear for high range 19 → the driven gear for high range 4 → the drive gear for first range 8 → the driven gear for first range 25 → the third selection mechanism 24 → the second shaft gear 26 → the normally engaged gear 9 → the drive gear for slow range 10 → the driven gear for slow range 28 → the fourth selection mechanism 27 → the driven gear for sub-transmission 32 → the driven gear for creep range one 13 → the driven gear for creep range two 14 → the driven gear for creep range 34 → the engaging sleeve for creep range 33 → the pinion shaft → the differential → the final drive assembly F.

14. Forward gear of second gear (high gear-low gear): the input shaft 01 → the first selection mechanism 1A → the first forward drive gear 2 press → the second normally engaged gear shaft 16 → the high-speed clutch C → the high-speed drive gear 19 → the high-speed driven gear 4 → the second drive gear 7 → the second driven gear 23 → the selection mechanism three 24 → the second shaft gear 26 → the normally engaged gear 9 → the slow drive gear 10 → the slow driven gear 28 → the selection mechanism four 27 → the sub-transmission driven gear 32 → the first creep gear driven gear 13 → the second creep gear driven gear 14 → the creep gear driven gear 34 → the creep gear sleeve 33 → the bevel pinion shaft → the differential → the final drive assembly F.

15. Forward gear iii (high gear-low gear): the input shaft 01 → the first selection mechanism 1A → the drive gear for forward gear 2 press → the second normally engaged gear shaft 16 → the high gear clutch C → the drive gear for high gear 19 → the driven gear for high gear 4 → the drive gear for third gear 6 → the driven gear for third gear 22 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the drive gear for slow gear 10 → the driven gear for slow gear 28 → the fourth selection mechanism 27 → the driven gear for sub-transmission 32 → the driven gear for creep gear one 13 → the driven gear for creep gear two 14 → the driven gear for creep gear 34 → the engaging sleeve for creep gear 33 → the pinion shaft → the differential → the final drive assembly F.

16. Iv forward gear (high gear-low gear): the input shaft 01 → the first selection mechanism 1A → the drive gear for forward range 2 press → the second normally engaged gear shaft 16 → the high range clutch C → the drive gear for high range 19 → the driven gear for high range 4 → the drive gear for fourth range 5 → the driven gear for fourth range 20 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the drive gear for slow range 10 → the driven gear for slow range 28 → the fourth selection mechanism 27 → the driven gear for sub-transmission 32 → the driven gear for creep range one 13 → the driven gear for creep range two 14 → the driven gear for creep range 34 → the engaging sleeve for creep range 33 → the pinion shaft → the differential → the final drive assembly F.

17. Gear i forward (low gear-high gear): input shaft 01 → selection mechanism one 1A → forward drive gear 2 press → normally engaged gear shaft two 16 → low-speed clutch B → low-speed drive gear 18 → low-speed driven gear 3 → first-speed drive gear 8 → first-speed driven gear 25 → selection mechanism three 24 → two shafts → selection mechanism four 27 → sub-transmission driven gear 32 → creep-speed driven gear one 13 → creep-speed driven gear two 14 → creep-speed driven gear 34 → creep-speed engaging sleeve 33 → pinion shaft → differential → final drive assembly F.

18. Gear ii forward (low gear-high gear): the input shaft 01 → the first selection mechanism 1A → the forward drive gear 2 press → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the second drive gear 7 → the second driven gear 23 → the selection mechanism three 24 → the second shaft → the selection mechanism four 27 → the sub-transmission driven gear 32 → the first creep-speed driven gear 13 → the second creep-speed driven gear 14 → the creep-speed driven gear 34 → the creep-speed engaging sleeve 33 → the pinion shaft → the differential → the final drive assembly F.

19. Gear iii forward (low gear-high gear): the input shaft 01 → the first selection mechanism 1A → the forward drive gear 2 press → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second shaft → the fourth selection mechanism 27 → the counter-speed driven gear 32 → the first creep-speed driven gear 13 → the second creep-speed driven gear 14 → the creep-speed driven gear 34 → the creep-speed sleeve 33 → the pinion shaft → the differential → the final drive assembly F.

20. Forward gear in gear iv (low gear-high gear): the input shaft 01 → the first selection mechanism 1A → the forward drive gear 2 press → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the fourth drive gear 5 → the fourth driven gear 20 → the second selection mechanism 21 → the second shaft → the selection mechanism four 27 → the sub-transmission driven gear 32 → the first creep-speed driven gear 13 → the second creep-speed driven gear 14 → the creep-speed driven gear 34 → the creep-speed sleeve 33 → the pinion shaft → the differential → the final drive assembly F.

21. Gear i forward (low-medium speed): input shaft 01 → selection mechanism one 1A → forward drive gear 2 press → normally engaged gear shaft two 16 → low-speed clutch B → low-speed drive gear 18 → low-speed driven gear 3 → first-speed drive gear 8 → first-speed driven gear 25 → selection mechanism three 24 → second-shaft gear 26 → normally engaged gear 9 → middle-speed drive gear 12 → middle-speed driven gear 31 → selection mechanism five 30 → auxiliary transmission driven gear 32 → creep-speed driven gear one 13 → creep-speed driven gear two 14 → creep-speed driven gear 34 → creep-speed engaging sleeve 33 → bevel pinion shaft → differential → final drive assembly F.

22. Gear ii forward (low-medium speed): the input shaft 01 → the first selection mechanism 1A → the forward drive gear 2 press → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the second drive gear 7 → the second driven gear 23 → the selection mechanism three 24 → the second shaft gear 26 → the normally engaged gear 9 → the middle drive gear 12 → the middle driven gear 31 → the selection mechanism five 30 → the sub-transmission driven gear 32 → the first creep gear driven gear 13 → the second creep gear driven gear 14 → the creep gear driven gear 34 → the creep gear engaging sleeve 33 → the bevel pinion shaft → the differential → the final drive assembly F.

23. Gear iii forward (low-medium speed): the input shaft 01 → the first selection mechanism 1A → the drive gear for forward gear 2 press → the second normally engaged gear shaft 16 → the low-speed clutch B → the drive gear for low-speed gear 18 → the driven gear for low-speed gear 3 → the drive gear for third gear 6 → the driven gear for third gear 22 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the drive gear for middle gear 12 → the driven gear for middle gear 31 → the fifth selection mechanism 30 → the driven gear for sub-transmission 32 → the driven gear for creep gear one 13 → the driven gear for creep gear two 14 → the driven gear for creep gear 34 → the engaging sleeve for creep gear 33 → the small bevel gear shaft → the differential → the final drive assembly F.

24. Forward gear of iv gear (low gear-medium speed): the input shaft 01 → the first selection mechanism 1A → the drive gear for forward gear 2 press → the second normally engaged gear shaft 16 → the low-speed clutch B → the drive gear for low-speed gear 18 → the driven gear for low-speed gear 3 → the drive gear for fourth gear 5 → the driven gear for fourth gear 20 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the drive gear for middle gear 12 → the driven gear for middle gear 31 → the fifth selection mechanism 30 → the driven gear for sub-transmission 32 → the driven gear for creep gear one 13 → the driven gear for creep gear two 14 → the driven gear for creep gear 34 → the engaging sleeve for creep gear 33 → the pinion shaft → the differential → the final drive assembly F.

25. Gear i forward (low gear-low speed): input shaft 01 → first selection mechanism 1A → pressing of forward drive gear 2 → second normally engaged gear shaft 16 → low-speed clutch B → low-speed drive gear 18 → low-speed driven gear 3 → second drive gear 7 → second driven gear 23 → selection mechanism three 24 → second shaft gear 26 → normally engaged gear 9 → low-speed drive gear 11 → low-speed driven gear 29 → selection mechanism five 30 → sub-transmission driven gear 32 → first creep gear driven gear 13 → second creep gear driven gear 14 → creep gear driven gear 34 → creep gear engaging sleeve 33 → small bevel gear shaft → differential → final drive assembly F.

26. Gear ii forward (low gear-low speed): input shaft 01 → first selection mechanism 1A → pressing of forward drive gear 2 → second normally engaged gear shaft 16 → low-speed clutch B → low-speed drive gear 18 → low-speed driven gear 3 → second drive gear 7 → second driven gear 23 → selection mechanism three 24 → second shaft gear 26 → normally engaged gear 9 → low-speed drive gear 11 → low-speed driven gear 29 → selection mechanism five 30 → sub-transmission driven gear 32 → first creep gear driven gear 13 → second creep gear driven gear 14 → creep gear driven gear 34 → creep gear engaging sleeve 33 → small bevel gear shaft → differential → final drive assembly F.

27. Gear iii forward (low gear-low speed): input shaft 01 → first selection mechanism 1A → driving gear for forward gear 2 press → second normally engaged gear shaft 16 → low-speed clutch B → driving gear for low-speed gear 18 → driven gear for low-speed gear 3 → driving gear for third gear 6 → driven gear for third gear 22 → second selection mechanism 21 → second shaft gear 26 → normally engaged gear 9 → driving gear for low-speed gear 11 → driven gear for low-speed gear 29 → fifth selection mechanism 30 → driven gear for auxiliary transmission 32 → first driven gear for creep gear 13 → second driven gear for creep gear 14 → driven gear for creep gear 34 → meshing sleeve for creep gear 33 → pinion shaft → differential → final drive assembly F.

28. Forward gear of iv gear (low gear-low speed): input shaft 01 → first selection mechanism 1A → driving gear for forward gear 2 press → second normally engaged gear shaft 16 → low-speed clutch B → driving gear for low-speed gear 18 → driven gear for low-speed gear 3 → driving gear for fourth gear 5 → driven gear for fourth gear 20 → second selection mechanism 21 → second shaft gear 26 → normally engaged gear 9 → driving gear for low-speed gear 11 → driven gear for low-speed gear 29 → fifth selection mechanism 30 → driven gear for auxiliary transmission 32 → first driven gear for creep gear 13 → second driven gear for creep gear 14 → driven gear for creep gear 34 → meshing sleeve for creep gear 33 → pinion shaft → differential → final drive assembly F.

29. Gear i forward (low gear-slow speed): input shaft 01 → first selection mechanism 1A → driving gear for forward gear 2 press → second normally engaged gear shaft 16 → low-speed clutch B → driving gear for low-speed gear 18 → driven gear for low-speed gear 3 → driving gear for first gear 8 → driven gear for first gear 25 → selection mechanism three 24 → second shaft gear 26 → normally engaged gear 9 → driving gear for slow gear 10 → driven gear for slow gear 28 → selection mechanism four 27 → driven gear for sub-transmission 32 → driven gear for creep gear one 13 → driven gear for creep gear two 14 → driven gear for creep gear 34 → meshing sleeve for creep gear 33 → pinion shaft → differential → final drive assembly F.

30. Gear ii forward (low gear-slow speed): input shaft 01 → first selection mechanism 1A → driving gear for forward gear 2 press → second normally engaged gear shaft 16 → low-speed clutch B → driving gear for low-speed gear 18 → driven gear for low-speed gear 3 → driving gear for two-speed gear 7 → driven gear for two-speed gear 23 → selection mechanism three 24 → second shaft gear 26 → normally engaged gear 9 → driving gear for slow gear 10 → driven gear for slow gear 28 → selection mechanism four 27 → driven gear for sub-transmission 32 → driven gear for creep gear one 13 → driven gear for creep gear two 14 → driven gear for creep gear 34 → meshing sleeve for creep gear 33 → bevel pinion shaft → differential → final drive assembly F.

31. Gear iii forward (low gear-slow speed): the input shaft 01 → the first selection mechanism 1A → the drive gear for forward gear 2 press → the second normally engaged gear shaft 16 → the low-speed clutch B → the drive gear for low-speed gear 18 → the driven gear for low-speed gear 3 → the drive gear for third gear 6 → the driven gear for third gear 22 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the drive gear for slow gear 10 → the driven gear for slow gear 28 → the fourth selection mechanism 27 → the driven gear for sub-transmission 32 → the first driven gear for creep gear 13 → the driven gear for creep gear two 14 → the driven gear for creep gear 34 → the engaging sleeve for creep gear 33 → the pinion shaft → the differential → the final drive assembly F.

32. Forward gear of iv gear (low gear-slow speed): the input shaft 01 → the first selector gear 1A → the drive gear for forward gear (2) press → the second normally engaged gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the drive gear for fourth gear 5 → the driven gear for fourth gear 20 → the second selector gear 21 → the second shaft gear 26 → the normally engaged gear 9 → the drive gear for slow gear 10 → the driven gear for slow gear 28 → the fourth selector gear 27 → the driven gear for counter-gear 32 → the first driven gear for creep gear 13 → the second driven gear for creep gear 14 → the driven gear for creep gear 34 → the engaging sleeve for creep gear 33 → the pinion shaft → the differential → the final drive assembly F.

Reverse gear transmission route:

transmission line of hanging crawling device

1. Gear i reverse (low-speed-high): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse idler gear 15 → the second reverse idler gear 17 → the second normally engaged gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the first drive gear 8 → the first driven gear 25 → the third selection mechanism 24 → the second shaft → the fourth selection mechanism 27 → the sub-transmission driven gear 32 → the first creep-speed driven gear 13 → the second creep-speed driven gear 14 → the creep-speed driven gear 34 → the creep-speed engaging sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

2. Gear ii reverse (low-high): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second normally engaged gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the second drive gear 7 → the second driven gear 23 → the third selection mechanism 24 → the second shaft → the fourth selection mechanism 27 → the sub-transmission driven shaft (32) → the first creep-speed driven gear 13 → the second creep-speed driven gear 14 → the creep-speed driven gear 34 → the creep-speed engaging sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

3. Gear iii reverse (low-high): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse idler gear 15 → the second reverse idler gear 17 → the second constant mesh gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second shaft → the fourth selection mechanism 27 → the sub-transmission driven gear 32 → the first creep-speed driven gear 13 → the second creep-speed driven gear 14 → the creep-speed driven gear 34 → the creep-speed mesh bush 33 → the small bevel gear shaft → the differential → the final drive assembly F.

4. Iv reverse (low-high): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse idler gear 15 → the second reverse idler gear 17 → the second normally engaged gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the fourth drive gear 5 → the fourth driven gear 20 → the second selection mechanism 21 → the second shaft → the fourth selection mechanism 27 → the sub-transmission driven gear 32 → the first creep-speed driven gear 13 → the second creep-speed driven gear 14 → the creep-speed driven gear 34 → the creep-speed engaging sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

5. Gear i reverse (low-medium speed): input shaft 01 → selection mechanism one 1A → reverse drive gear 1 → reverse idler gear one 15 → reverse idler gear two 17 → normally engaged gear shaft two 16 → low-speed clutch B → low-speed drive gear 18 → low-speed driven gear 3 → first-speed drive gear 8 → first-speed driven gear 25 → selection mechanism three 24 → biaxial gear 26 → normally engaged gear 9 → middle-speed drive gear 12 → middle-speed driven gear 31 → selection mechanism five 30 → sub-transmission driven gear 32 → creep-speed driven gear one 13 → creep-speed driven gear two 14 → creep-speed driven gear 34 → creep-speed engaging sleeve 33 → small bevel gear shaft → differential → final drive assembly F.

6. Gear ii reverse (low-medium speed): input shaft 01 → selection mechanism one 1A → reverse drive gear 1 → reverse idler gear one 15 → reverse idler gear two 17 → normally engaged gear shaft two 16 → low-speed clutch B → low-speed drive gear 18 → low-speed driven gear 3 → secondary drive gear 7 → secondary driven gear 23 → selection mechanism three 24 → secondary shaft gear 26 → normally engaged gear 9 → intermediate drive gear 12 → intermediate driven gear 31 → selection mechanism five 30 → sub-transmission driven gear 32 → creep gear driven gear one 13 → creep gear driven gear two 14 → creep gear driven gear 34 → creep gear engaging sleeve 33 → small bevel gear shaft → differential → final drive assembly F.

7. Gear iii reverse (low-medium speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse idler gear 15 → the second reverse idler gear 17 → the second constant mesh gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second idler gear 26 → the constant mesh gear 9 → the middle drive gear 12 → the middle driven gear 31 → the fifth selection mechanism 30 → the sub-transmission driven gear 32 → the first creep drive gear 13 → the second creep drive gear 14 → the second creep drive gear 34 → the second creep drive sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

8. Iv reverse (low-medium speed): input shaft 01 → selection mechanism one 1A → reverse drive gear 1 → reverse idler gear one 15 → reverse idler gear two 17 → normally engaged gear shaft two 16 → low-speed clutch B → low-speed drive gear 18 → low-speed driven gear 3 → fourth drive gear 5 → fourth driven gear 20 → selection mechanism two 21 → biaxial gear 26 → normally engaged gear 9 → intermediate drive gear 12 → intermediate driven gear 31 → selection mechanism five 30 → sub-transmission driven gear 32 → creep gear driven gear one 13 → creep gear driven gear two 14 → creep gear driven gear 34 → creep gear engaging sleeve 33 → small bevel gear shaft → differential → final drive assembly F.

9. Gear i reverse (low gear-low speed): input shaft 01 → selection mechanism one 1A → reverse drive gear 1 → reverse idler gear one 15 → reverse idler gear two 17 → normally engaged gear shaft two 16 → low-speed clutch B → low-speed drive gear 18 → low-speed driven gear 3 → first-speed drive gear 8 → first-speed driven gear 25 → selection mechanism three 24 → biaxial gear 26 → normally engaged gear 9 → low-speed drive gear 11 → low-speed driven gear 29 → selection mechanism five 30 → sub-transmission driven gear 32 → creep-speed driven gear one 13 → creep-speed driven gear two 14 → creep-speed driven gear 34 → creep-speed engaging sleeve 33 → small bevel gear shaft → differential → final drive assembly F.

10. Gear ii reverse (low gear-low speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse idler gear 15 → the second reverse idler gear 17 → the normally engaged gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the second drive gear 7 → the second driven gear 23 → the selection mechanism third 24 → the second shaft gear 26 → the normally engaged gear 9 → the low-speed drive gear 11 → the low-speed driven gear 29 → the selection mechanism fifth 30 → the subtransmission driven gear 32 → the first creep-speed driven gear 13 → the second creep-speed driven gear 14 → the creep-speed driven gear 34 → the creep-speed engaging sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

11. Gear iii reverse (low gear-low speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse idler gear 15 → the second reverse idler gear 17 → the second normally engaged gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second idler gear 26 → the normally engaged gear 9 → the low-speed drive gear 11 → the low-speed driven gear 29 → the fifth selection mechanism 30 → the sub-transmission driven gear 32 → the first creep-speed driven gear 13 → the second creep-speed driven gear 14 → the creep-speed driven gear 34 → the creep-speed engaging sleeve 33 → the small bevel gear shaft → the differential → the final transmission assembly F.

12. Iv reverse (low gear-low speed): input shaft 01 → selection mechanism one 1A → reverse drive gear 1 → reverse idler gear one 15 → reverse idler gear two 17 → normally engaged gear shaft two 16 → low-speed clutch B → low-speed drive gear 18 → low-speed driven gear 3 → fourth drive gear 5 → fourth driven gear 20 → selection mechanism two 21 → biaxial gear 26 → normally engaged gear 9 → intermediate drive gear 12 → intermediate driven gear 31 → selection mechanism five 30 → sub-transmission driven gear 32 → creep gear driven gear one 13 → creep gear driven gear two 14 → creep gear driven gear 34 → creep gear engaging sleeve 33 → small bevel gear shaft → differential → final drive assembly F.

13. Gear i reverse (low gear-low speed): input shaft 01 → selection mechanism one 1A → reverse drive gear 1 → reverse idler gear one 15 → reverse idler gear two 17 → normally engaged gear shaft two 16 → low-speed clutch B → low-speed drive gear 18 → low-speed driven gear 3 → first-speed drive gear 8 → first-speed driven gear 25 → selection mechanism three 24 → biaxial gear 26 → normally engaged gear 9 → slow drive gear 10 → slow driven gear 28 → selection mechanism four 27 → sub-transmission driven gear 32 → creep-speed driven gear one 13 → creep-speed driven gear two 14 → creep-speed driven gear 34 → creep-speed engaging sleeve 33 → small bevel gear shaft → differential → final drive assembly F.

14. Gear ii reverse (low gear-slow speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse idler gear 15 → the second reverse idler gear 17 → the second constant mesh gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the second drive gear 7 → the second driven gear 23 → the third selection mechanism 24 → the second shaft gear 26 → the constant mesh gear 9 → the slow drive gear 10 → the slow driven gear 28 → the fourth selection mechanism 27 → the counter-speed driven gear 32 → the first creep-speed driven gear 13 → the second creep-speed driven gear 14 → the creep-speed driven gear 34 → the creep-speed meshing sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

15. Gear iii reverse (low gear-low speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse idler gear 15 → the second reverse idler gear 17 → the second constant mesh gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second idler gear 26 → the constant mesh gear 9 → the slow drive gear 10 → the slow driven gear 28 → the fourth selection mechanism 27 → the sub-transmission driven gear 32 → the first creep drive gear 13 → the second creep drive gear 14 → the creep drive driven gear 34 → the creep drive sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

16. Iv reverse (low-slow): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse idler gear 15 → the second reverse idler gear 17 → the second constant mesh gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the fourth drive gear 5 → the fourth driven gear 20 → the second selection mechanism 21 → the second idler gear 26 → the constant mesh gear 9 → the slow drive gear 10 → the slow driven gear 28 → the selection mechanism four 27 → the sub-transmission driven gear 32 → the first creep drive gear 13 → the second creep drive gear 14 → the creep drive driven gear 34 → the creep drive sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

17. Reverse gear i (high gear-high speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse idler gear 15 → the second reverse idler gear 17 → the second constant mesh gear shaft 16 → the high-speed clutch C → the high-speed drive gear 19 → the high-speed driven gear 4 → the first drive gear 8 → the first driven gear 25 → the third selection mechanism 24 → the second shaft → the fourth selection mechanism 27 → the subtransmission driven gear 32 → the first creep-speed driven gear 13 → the second creep-speed driven gear 14 → the creep-speed driven gear 34 → the creep-speed mesh bush 33 → the small bevel gear shaft → the differential → the final drive assembly F.

18. Reverse gear ii (high gear — high speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the normally engaged gear shaft 16 → the high-speed clutch C → the high-speed drive gear 19 → the high-speed driven gear 4 → the second drive gear 7 → the second driven gear 23 → the third selection mechanism 24 → the second shaft → the fourth selection mechanism 27 → the sub-transmission driven gear 32 → the first creep-speed driven gear 13 → the second creep-speed driven gear 14 → the creep-speed driven gear 34 → the creep-speed engaging sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

19. Reverse gear iii (high gear — high speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the normally engaged gear shaft 16 → the high-speed clutch C → the high-speed drive gear 19 → the high-speed driven gear 4 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second shaft → the fourth selection mechanism 27 → the subtransmission driven gear 32 → the first creep gear driven gear 13 → the second creep gear driven gear 14 → the creep gear driven gear 34 → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

20. Iv-gear reverse (high gear-high speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second constant mesh gear shaft 16 → the high-speed clutch C → the high-speed drive gear 19 → the high-speed driven gear 4 → the fourth drive gear 5 → the fourth driven gear 20 → the second selection mechanism 21 → the second shaft → the fourth selection mechanism 27 → the subtransmission driven gear 32 → the first creep gear driven gear 13 → the second creep gear driven gear 14 → the creep gear driven gear 34 → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

21. Reverse i gear (high-medium speed): input shaft 01 → selection mechanism one 1A → reverse drive gear 1 → reverse idler gear one 15 → reverse idler gear two 17 → normally engaged gear shaft two 16 → high-speed clutch C → high-speed drive gear 19 → high-speed driven gear 4 → first-speed drive gear 8 → first-speed driven gear 25 → selection mechanism three 24 → second-shaft gear 26 → normally engaged gear 9 → middle-speed drive gear 12 → middle-speed driven gear 31 → selection mechanism five 30 → sub-transmission driven gear 32 → creep-speed driven gear one 13 → creep-speed driven gear two 14 → creep-speed driven gear 34 → creep-speed engaging sleeve 33 → small bevel gear shaft → differential → final drive assembly F.

22. Gear ii reverse (high-speed gear — medium speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the normally meshed gear shaft 16 → the high speed clutch C → the high speed drive gear 19 → the high speed driven gear 4 → the second drive gear 7 → the second driven gear 23 → the selection mechanism third 24 → the second shaft gear 26 → the normally meshed gear 9 → the middle drive gear 12 → the middle driven gear 31 → the selection mechanism fifth 30 → the subtransmission driven gear 32 → the first creep drive gear 13 → the second creep drive gear 14 → the creep drive gear 34 → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

23. Reverse gear iii (high-intermediate speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second normally engaged gear shaft 16 → the high speed clutch C → the high speed drive gear 19 → the high speed driven gear 4 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the middle drive gear 12 → the middle driven gear 31 → the fifth selection mechanism 30 → the sub-transmission driven gear 32 → the first creep drive gear 13 → the second creep drive gear 14 → the second creep drive gear 34 → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

24. Iv reverse (high-medium speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second normally engaged gear shaft 16 → the high speed clutch C → the high speed drive gear 19 → the high speed driven gear 4 → the fourth drive gear 5 → the fourth driven gear 20 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the middle drive gear 12 → the middle driven gear 31 → the fifth selection mechanism 30 → the sub-transmission driven gear 32 → the first creep drive gear 13 → the second creep drive gear 14 → the second creep drive gear 34 → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

25. Reverse i (high-low): input shaft 01 → selection mechanism one 1A → reverse drive gear 1 → reverse idler gear one 15 → reverse idler gear two 17 → normally engaged gear shaft two 16 → high-speed clutch C → high-speed drive gear 19 → high-speed driven gear 4 → first-speed drive gear 8 → first-speed driven gear 25 → selection mechanism three 24 → second-shaft gear 26 → normally engaged gear 9 → low-speed drive gear 11 → low-speed driven gear 29 → selection mechanism five 30 → sub-transmission driven gear 32 → creep-speed driven gear one 13 → creep-speed driven gear two 14 → creep-speed driven gear 34 → creep-speed engaging sleeve 33 → small bevel gear shaft → differential → final drive assembly F.

26. Reverse gear ii (high gear-low gear): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the normally meshed gear shaft 16 → the high speed clutch C → the high speed drive gear 19 → the high speed driven gear 4 → the second drive gear 7 → the second driven gear 23 → the selection mechanism third 24 → the second shaft gear 26 → the normally meshed gear 9 → the low speed drive gear 11 → the low speed driven gear 29 → the selection mechanism fifth 30 → the subtransmission driven gear 32 → the first creep speed driven gear 13 → the second creep speed driven gear 14 → the creep speed driven gear 34 → the creep speed meshing sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

27. Reverse gear iii (high gear-low gear): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second normally engaged gear shaft 16 → the high speed clutch C → the high speed drive gear 19 → the high speed driven gear 4 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the low drive gear 11 → the low driven gear 29 → the fifth selection mechanism 30 → the sub-transmission driven gear 32 → the first creep drive gear 13 → the second creep drive gear 14 → the second creep drive gear 34 → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

28. Iv reverse (high-low): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second normally engaged gear shaft 16 → the high speed clutch C → the high speed drive gear 19 → the high speed driven gear 4 → the fourth drive gear 5 → the fourth driven gear 20 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the middle drive gear 12 → the middle driven gear 31 → the fifth selection mechanism 30 → the sub-transmission driven gear 32 → the first creep drive gear 13 → the second creep drive gear 14 → the second creep drive gear 34 → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

29. Reverse i gear (high-speed-low speed): input shaft 01 → selection mechanism one 1A → reverse drive gear 1 → reverse idler gear one 15 → reverse idler gear two 17 → normally engaged gear shaft two 16 → high-speed clutch C → high-speed drive gear 19 → high-speed driven gear 4 → first-speed drive gear 8 → first-speed driven gear 25 → selection mechanism three 24 → second-shaft gear 26 → normally engaged gear 9 → slow drive gear 10 → slow driven gear 28 → selection mechanism four 27 → sub-transmission driven gear 32 → creep-speed driven gear one 13 → creep-speed driven gear two 14 → creep-speed driven gear 34 → creep-speed engaging sleeve 33 → small bevel gear shaft → differential → final drive assembly F.

30. Reverse gear ii (high-speed gear — slow speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the normally engaged gear shaft 16 → the high-speed clutch C → the high-speed drive gear 19 → the high-speed driven gear 4 → the second drive gear 7 → the second driven gear 23 → the selection mechanism three 24 → the second shaft gear 26 → the normally engaged gear 9 → the slow drive gear 10 → the slow driven gear 28 → the selection mechanism four 27 → the range driven gear 32 → the first creep gear driven gear 13 → the second creep gear driven gear 14 → the creep gear driven gear 34 → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

31. Reverse gear iii (high gear-low gear): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second constant mesh gear shaft 16 → the high speed clutch C → the high speed drive gear 19 → the high speed driven gear 4 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second shaft gear 26 → the constant mesh gear 9 → the slow drive gear 10 → the slow driven gear 28 → the fourth selection mechanism 27 → the sub-transmission driven gear 32 → the first creep drive gear 13 → the second creep drive gear 14 → the creep drive gear 34 → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

32. Iv-gear reverse (high-gear-low): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second constant mesh gear shaft 16 → the high speed clutch C → the high speed drive gear 19 → the high speed driven gear 4 → the fourth drive gear 5 → the fourth driven gear 20 → the second selection mechanism 21 → the second shaft gear 26 → the constant mesh gear 9 → the slow drive gear 10 → the slow driven gear 28 → the selection mechanism four 27 → the sub-transmission driven gear 32 → the first creep drive gear 13 → the second creep drive gear 14 → the creep drive gear 34 → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

(II) transmission route of unhooking crawling device

1. Gear i reverse (low-speed-high): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second normally engaged gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the first drive gear 8 → the first driven gear 25 → the third selection mechanism 24 → the second shaft → the fourth selection mechanism 27 → the sub-transmission driven shaft → the creep-speed engaging sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

2. Gear ii reverse (low-high): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second normally engaged gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the second drive gear 7 → the second driven gear 23 → the third selection mechanism 24 → the second shaft → the fourth selection mechanism 27 → the sub-transmission driven shaft → the creep-speed engaging sleeve 33 → the small bevel pinion shaft → the differential → the final drive assembly F.

3. Gear iii reverse (low-high): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second normally engaged gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second selection mechanism → the fourth selection mechanism 27 → the sub-transmission driven shaft → the creep-speed engaging sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

4. Iv reverse (low-high): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second normally engaged gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the fourth drive gear 5 → the fourth driven gear 20 → the second selection mechanism 21 → the second shaft → the fourth selection mechanism 27 → the sub-transmission driven shaft → the creep-speed engaging sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

5. Gear i reverse (low-medium speed): input shaft 01 → selection mechanism one 1A → reverse drive gear 1 → reverse idler gear one 15 → reverse idler gear two 17 → normally engaged gear shaft two 16 → low-speed clutch B → low-speed drive gear 18 → low-speed driven gear 3 → first-speed drive gear 8 → first-speed driven gear 25 → selection mechanism three 24 → biaxial gear 26 → normally engaged gear 9 → middle-speed drive gear 12 → middle-speed driven gear 31 → selection mechanism five 30 → sub-transmission driven shaft → creep-gear engaging sleeve 33 → small bevel pinion shaft → differential → final drive assembly F.

6. Gear ii reverse (low-medium speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the second drive gear 7 → the second driven gear 23 → the third selection mechanism 24 → the second shaft gear 26 → the normally engaged gear 9 → the middle drive gear 12 → the middle driven gear 31 → the fifth selection mechanism 30 → the sub-transmission driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

7. Gear iii reverse (low-medium speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second normally engaged gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the middle drive gear 12 → the middle driven gear 31 → the fifth selection mechanism 30 → the sub-transmission driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

8. Iv reverse (low-medium speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second normally engaged gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the fourth drive gear 5 → the fourth driven gear 20 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the middle drive gear 12 → the middle driven gear 31 → the fifth selection mechanism 30 → the sub-transmission driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

9. Gear i reverse (low gear-low speed): input shaft 01 → selection mechanism one 1A → reverse drive gear 1 → reverse idler gear one 15 → reverse idler gear two 17 → normally engaged gear shaft two 16 → low-speed clutch B → low-speed drive gear 18 → low-speed driven gear 3 → first-speed drive gear 8 → first-speed driven gear 25 → selection mechanism three 24 → biaxial gear 26 → normally engaged gear 9 → low-speed drive gear 11 → low-speed driven gear 29 → selection mechanism five 30 → sub-transmission driven shaft → creep-gear engaging sleeve 33 → small bevel pinion shaft → differential → final drive assembly F.

10. Gear ii reverse (low gear-low speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the normally engaged gear shaft two 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the second drive gear 7 → the second driven gear 23 → the third selection mechanism 24 → the second shaft gear 26 → the normally engaged gear 9 → the low-speed drive gear 11 → the low-speed driven gear 29 → the fifth selection mechanism 30 → the sub-transmission driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

11. Gear iii reverse (low gear-low speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse idler gear 15 → the second reverse idler gear 17 → the second normally engaged gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second idler gear 26 → the normally engaged gear 9 → the low-speed drive gear 11 → the low-speed driven gear 29 → the fifth selection mechanism 30 → the sub-transmission driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

12. Iv reverse (low gear-low speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second normally engaged gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the fourth drive gear 5 → the fourth driven gear 20 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the low-speed drive gear 11 → the low-speed driven gear 29 → the fifth selection mechanism 30 → the sub-transmission driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

13. Gear i reverse (low gear-low speed): input shaft 01 → selection mechanism one 1A → reverse drive gear 1 → reverse idler gear one 15 → reverse idler gear two 17 → normally engaged gear shaft two 16 → low-speed clutch B → low-speed drive gear 18 → low-speed driven gear 3 → first-speed drive gear 8 → first-speed driven gear 25 → selection mechanism three 24 → biaxial gear 26 → normally engaged gear 9 → slow drive gear 10 → slow driven gear 28 → selection mechanism four 27 → sub-transmission driven shaft → creep-gear engaging sleeve 33 → small bevel pinion shaft → differential → final drive assembly F.

14. Gear ii reverse (low gear-slow speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second normally engaged gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the second drive gear 7 → the second driven gear 23 → the third selection mechanism 24 → the second shaft gear 26 → the normally engaged gear 9 → the slow drive gear 10 → the slow driven gear 28 → the fourth selection mechanism 27 → the sub-transmission driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

15. Gear iii reverse (low gear-low speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second constant mesh gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second shaft gear 26 → the constant mesh gear 9 → the slow drive gear 10 → the slow driven gear 28 → the fourth selection mechanism 27 → the sub-transmission driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

16. Iv reverse (low-slow): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second constant mesh gear shaft 16 → the low-speed clutch B → the low-speed drive gear 18 → the low-speed driven gear 3 → the fourth drive gear 5 → the fourth driven gear 20 → the second selection mechanism 21 → the second shaft gear 26 → the constant mesh gear 9 → the slow drive gear 10 → the slow driven gear 28 → the fourth selection mechanism 27 → the sub-transmission driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

17. Reverse gear i (high gear-high speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second constant mesh gear shaft 16 → the high speed clutch C → the high speed drive gear 19 → the high speed driven gear 4 → the first drive gear 8 → the first driven gear 25 → the third selection mechanism 24 → the second shaft → the fourth selection mechanism 27 → the sub-transmission driven shaft → the creep speed engaging sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

18. Reverse gear ii (high gear — high speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the normally engaged gear shaft two 16 → the high-speed clutch C → the high-speed drive gear 19 → the high-speed driven gear 4 → the second drive gear 7 → the second driven gear 23 → the third selection mechanism 24 → the second shaft → the fourth selection mechanism 27 → the sub-transmission driven shaft → the creep-speed engaging sleeve 33 → the small bevel pinion shaft → the differential → the final drive assembly F.

19. Reverse gear iii (high gear — high speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the normally engaged gear shaft two 16 → the high-speed clutch C → the high-speed drive gear 19 → the high-speed driven gear 4 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second shaft → the fourth selection mechanism 27 → the sub-transmission driven shaft → the creep-speed engaging sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

20. Iv-gear reverse (high gear-high speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second constant mesh gear shaft 16 → the high speed clutch C → the high speed drive gear 19 → the high speed driven gear 4 → the fourth drive gear 5 → the fourth driven gear 20 → the second selection mechanism 21 → the second shaft → the fourth selection mechanism 27 → the sub-transmission driven shaft → the creep speed engaging sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

21. Reverse i gear (high-medium speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the normally engaged gear shaft 16 → the high-speed clutch C → the high-speed drive gear 19 → the high-speed driven gear 4 → the first drive gear 8 → the first driven gear 25 → _ selection mechanism three 24 → the second shaft gear 26 → the normally engaged gear 9 → the middle drive gear 12 → the middle driven gear 31 → the selection mechanism five 30 → the sub-transmission driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

22. Gear ii reverse (high-speed gear — medium speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the normally meshed gear shaft 16 → the high speed clutch C → the high speed drive gear 19 → the high speed driven gear 4 → the second drive gear 7 → the second driven gear 23 → the third selection mechanism 24 → the second shaft gear 26 → the normally meshed gear 9 → the middle drive gear 12 → the middle driven gear 31 → the fifth selection mechanism 30 → the sub-transmission driven shaft → the creep speed engaging sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

23. Reverse gear iii (high-intermediate speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second normally engaged gear shaft 16 → the high-speed clutch C → the high-speed drive gear 19 → the high-speed driven gear 4 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the middle drive gear 12 → the middle driven gear 31 → the fifth selection mechanism 30 → the sub-transmission driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

24. Iv reverse (high-medium speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second normally engaged gear shaft 16 → the high-speed clutch C → the high-speed drive gear 19 → the high-speed driven gear 4 → the fourth drive gear 5 → the fourth driven gear 20 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the middle drive gear 12 → the middle driven gear 31 → the fifth selection mechanism 30 → the sub-transmission driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

25. Reverse i (high-low): input shaft 01 → selection mechanism one 1A → reverse drive gear 1 → reverse idler gear one 15 → reverse idler gear two 17 → normally engaged gear shaft two 16 → high-speed clutch C → high-speed drive gear 19 → high-speed driven gear 4 → first drive gear 8 → first driven gear 25 → selection mechanism three 24 → second shaft gear 26 → normally engaged gear 9 → low-speed drive gear 11 → low-speed driven gear 29 → selection mechanism five 30 → sub-transmission driven shaft → creep-gear sleeve 33 → small bevel pinion shaft → differential → final drive assembly F.

26. Reverse gear ii (high gear-low gear): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the normally meshed gear shaft 16 → the high-speed clutch C → the high-speed drive gear 19 → the high-speed driven gear 4 → the second drive gear 7 → the second driven gear 23 → the third selection mechanism 24 → the second shaft gear 26 → the normally meshed gear 9 → the low drive gear 11 → the low driven gear 29 → the fifth selection mechanism 30 → the sub-transmission driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

27. Reverse gear iii (high gear-low gear): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second normally engaged gear shaft 16 → the high speed clutch C → the high speed drive gear 19 → the high speed driven gear 4 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the low drive gear 11 → the low driven gear 29 → the fifth selection mechanism 30 → the sub-transmission driven shaft → the creep speed engaging sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

28. Iv reverse (high-low): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second normally engaged gear shaft 16 → the high speed clutch C → the high speed drive gear 19 → the high speed driven gear 4 → the fourth drive gear 5 → the fourth driven gear 20 → the second selection mechanism 21 → the second shaft gear 26 → the normally engaged gear 9 → the low drive gear 11 → the low driven gear 29 → the fifth selection mechanism 30 → the sub-transmission driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

29. Reverse i gear (high-speed-low speed): input shaft 01 → selection mechanism one 1A → reverse drive gear 1 → reverse intermediate gear one 15 → reverse intermediate gear two 17 → normally engaged gear shaft two 16 → high-speed clutch C → high-speed drive gear 19 → high-speed driven gear 4 → first-speed drive gear 8 → first-speed driven gear 25 → selection mechanism three 24 → second-shaft gear 26 → normally engaged gear 9 → slow drive gear 10 → slow driven gear 28 → selection mechanism four 27 → sub-transmission driven shaft → creep-gear sleeve 33 → small bevel pinion shaft → differential → final drive assembly F.

30. Reverse gear ii (high-speed gear — slow speed): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the normally meshed gear shaft 16 → the high-speed clutch C → the high-speed drive gear 19 → the high-speed driven gear 4 → the second drive gear 7 → the second driven gear 23 → the third selection mechanism 24 → the second shaft gear 26 → the normally meshed gear 9 → the slow drive gear 10 → the slow driven gear 28 → the fourth selection mechanism 27 → the sub-transmission driven shaft → the creep gear sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

31. Reverse gear iii (high gear-low gear): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second constant mesh gear shaft 16 → the high speed clutch C → the high speed drive gear 19 → the high speed driven gear 4 → the third drive gear 6 → the third driven gear 22 → the second selection mechanism 21 → the second shaft gear 26 → the constant mesh gear 9 → the slow drive gear 10 → the slow driven gear 28 → the fourth selection mechanism 27 → the sub-transmission driven shaft → the creep speed engaging sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

32. Iv-gear reverse (high-gear-low): the input shaft 01 → the first selection mechanism 1A → the reverse drive gear 1 → the first reverse intermediate gear 15 → the second reverse intermediate gear 17 → the second constant mesh gear shaft 16 → the high speed clutch C → the high speed drive gear 19 → the high speed driven gear 4 → the fourth drive gear 5 → the fourth driven gear 20 → the second selection mechanism 21 → the second shaft gear 26 → the constant mesh gear 9 → the slow drive gear 10 → the slow driven gear 28 → the fourth selection mechanism 27 → the sub-transmission driven shaft → the creep speed engaging sleeve 33 → the small bevel gear shaft → the differential → the final drive assembly F.

In another embodiment of the present invention, as shown in fig. 1, a tractor comprises: fuselage and the tractor variable speed system of any one of the above-mentioned embodiment.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A tractor transmission system, comprising:

the reversing assembly, the main transmission assembly, the auxiliary transmission assembly and the crawling gear assembly are sequentially arranged;

the reversing assembly comprises an input shaft (01) and a reverse gear intermediate shaft which are arranged in parallel; the input shaft (01) is sleeved with a reverse gear driving gear (1) and a forward gear driving gear (2) in an idle mode, and a first selection mechanism (1A) which can be selectively connected with the reverse gear driving gear (1) or the forward gear driving gear (2) is fixedly arranged on the input shaft (01); the reverse gear intermediate shaft is fixedly provided with a reverse gear intermediate gear I (15) and a reverse gear intermediate gear II (17); the reverse gear intermediate gear I (15) is meshed with the reverse gear driving gear (1);

the main transmission assembly comprises a low-gear clutch (B), a high-gear clutch (C) and a plurality of main transmission paths, and any main transmission path can be in transmission connection with the low-gear clutch (B) or the high-gear clutch (C) respectively; the low-speed clutch (B) is selectively in transmission connection with the forward driving gear (2) or the reverse intermediate gear II (17); the high-speed clutch (C) is selectively in transmission connection with the forward driving gear (2) or the reverse intermediate gear (17);

the auxiliary transmission assembly is provided with a plurality of auxiliary transmission paths;

any of said main transmission paths is selectively drivingly connected to any of said auxiliary transmission paths; any main speed change transmission path is in transmission connection with any auxiliary speed change transmission path and then can be selectively in transmission connection with the crawling gear assembly.

2. The tractor transmission system of claim 1, wherein:

the main transmission assembly comprises high and low gear spline shafts, a constant meshed gear shaft II (16), a first shaft and a second shaft which are arranged in parallel; the high-low gear spline shaft is in transmission connection with the shaft;

the high-low gear spline shaft is sleeved with a low-low gear driven gear (3) and a high-speed gear driven gear (4) in a hollow manner;

the normally meshed gear shaft II (16) is provided with the low-gear clutch (B) and the high-gear clutch (C); the normally meshed gear shaft II (16) is sleeved with a low-speed driving gear (18) corresponding to the low-speed clutch (B) in a neutral mode, and the low-speed driving gear (18) is meshed with the low-speed driven gear (3); a second normally meshed gear shaft (16) is sleeved with a high-speed gear driving gear (19) corresponding to the high-speed gear clutch (C) in an idle mode, and the high-speed gear driving gear (19) is meshed with the high-speed gear driven gear (4);

the shaft is fixedly provided with N driving gears, wherein the nth driving gear is an N-gear driving gear; the two shafts are sleeved with N driven gears; the nth driven gear is an n-gear driven gear; the two shafts are fixedly provided with a selection mechanism which can be selectively connected with the n-gear driven gear or the (n-1) -gear driven gear, and each driven gear is correspondingly provided with one selection mechanism; the N-gear driving gear and the N-gear driven gear are correspondingly meshed and connected one by one to form N main transmission paths; wherein N, N are positive integers greater than 1, and N is less than or equal to N.

3. The tractor transmission system of claim 2, wherein:

the first shaft is sleeved with a four-gear driving gear (5), a three-gear driving gear (6), a two-gear driving gear (7) and a first-gear driving gear (8);

the two-shaft idle sleeve is provided with a four-gear driven gear (20), a three-gear driven gear (22), a two-gear driven gear (23) and a one-gear driven gear (25); a second selection mechanism (21) selectively connected with the fourth-gear driven gear (20) or the third-gear driven gear (22) and a third selection mechanism (24) selectively connected with the second-gear driven gear (23) or the first-gear driven gear (25) are fixedly arranged on the second shaft;

the four-gear driving gear (5) is meshed and connected with the four-gear driven gear (20) to form a main transmission path;

the three-gear driving gear (6) is meshed with the three-gear driven gear (22) to form a main transmission path;

the second-gear driving gear (7) is meshed and connected with the second-gear driven gear (23) to form a main transmission path;

the first gear driving gear (8) and the first gear driven gear (25) are meshed and connected to form a main transmission path.

4. The tractor transmission system of claim 2, wherein:

the selection mechanism adopts a synchronizer or an engagement sleeve.

5. The tractor transmission system of claim 2, wherein:

and a second normally meshed gear shaft (16) is fixedly provided with an intermediate gear, and the intermediate gear is respectively meshed with the forward gear driving gear (2) and the reverse gear intermediate gear (17).

6. The tractor transmission system according to any one of claims 2 to 5, characterized in that:

the auxiliary transmission assembly comprises a first normally-meshed gear shaft and an auxiliary transmission driven shaft;

a constant meshed gear (9), a slow gear driving gear (10), a low gear driving gear (11) and a middle gear driving gear (12) are sleeved on the first constant meshed gear shaft in an idle mode;

a two-shaft gear (26) is fixedly arranged on the two shafts;

the main transmission assembly further includes three shafts;

the auxiliary transmission driven shaft is sleeved with a slow-gear driven gear (28), a low-gear driven gear (29) and a medium-gear driven gear (31) in a free mode; a fourth selection mechanism (27) selectively connected with the second shaft gear (26) or the slow gear driven gear (28) and a fifth selection mechanism (30) selectively connected with the low gear driven gear (29) or the middle gear driven gear (31) are fixedly arranged on the three shaft;

the constant mesh gear (9) is meshed and connected with the double-shaft gear (26) to form a pair of variable speed transmission paths;

the slow gear driving gear (10) is meshed with the slow gear driven gear (28) to form a pair of variable speed transmission paths;

the low-gear driving gear (11) is meshed with the low-gear driven gear (29) to form a pair of speed change transmission paths;

the intermediate gear driving gear (12) is meshed and connected with the intermediate gear driven gear (31) to form a pair of variable speed transmission paths.

7. The tractor transmission system of claim 6, wherein:

the crawling gear assembly comprises a crawling gear shaft and a small bevel gear shaft;

the crawling gear shaft is sleeved with a crawling gear driven gear I (13) and a crawling gear driven gear II (14) in a free manner;

an auxiliary transmission driven gear (32) is fixedly arranged on the auxiliary transmission driven shaft, and the auxiliary transmission driven gear (32) is meshed with the crawling gear driven gear I (13);

the small bevel gear shaft is fixedly provided with a crawling gear meshing sleeve (33); the small bevel gear shaft is sleeved with a crawling gear driven gear (34) in an empty mode, and the crawling gear driven gear (34) is meshed with the crawling gear driven gear II (14); the creeper gear sleeve (33) is selectively connectable to either the range driven gear (32) or the creeper gear driven gear (34).

8. The tractor transmission system of claim 7, wherein:

the small bevel gear shaft is in transmission connection with a differential mechanism; the differential is in driving connection with the final drive assembly.

9. The tractor transmission system of claim 7, wherein:

and the small bevel gear shaft is in transmission connection with the transfer case assembly.

10. A tractor, comprising:

a fuselage and a tractor transmission system as claimed in any one of the preceding claims 1 to 9.