A tractor transmission system and a tractor

Abstract

The invention discloses a tractor transmission system and a tractor, wherein the tractor transmission system comprises: a reversing assembly, a main transmission assembly, a sub-transmission assembly and a crawler gear assembly arranged in sequence; the main transmission assembly comprises a Lo clutch, a Hi clutch and a plurality of main transmission paths, any main transmission path can be respectively connected to the Lo clutch or the Hi clutch; the Lo clutch is selectively connected to the forward gear driving gear or the reverse gear intermediate gear; the Hi clutch is selectively connected to the forward gear driving gear or the reverse gear intermediate gear; any main transmission path is selectively connected to any sub-transmission path; any main transmission path can be selectively connected to the crawler gear assembly after being connected to any sub-transmission path. The invention realizes that the tractor has 64 forward gears and 64 reverse gears, a total of 128 gears, and the entire transmission system has a compact structure and high transmission efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of tractor speed change, in particular to a tractor speed change system and a tractor. Background Art

[0002] At present, the gear shifting of domestic tractor transmission system mainly adopts meshing sleeve or synchronizer. When shifting gears, the main clutch needs to be separated to cut off the tractor power transmission, and then the gear shifting and reversing operations are performed through the joystick. This method is simple and reliable, and the manufacturing cost is low. However, the labor intensity of the driver is relatively large when operating frequently. Therefore, those skilled in the art are in urgent need of providing a new gear shifting and reversing operating system. Summary of the invention

[0003] In order to simplify the driver's operation and reduce the driver's labor intensity, the present invention provides a tractor speed change system and a tractor, which realizes that the tractor has 64 forward gears and 64 reverse gears, a total of 128 gears, and has a variety of power output speed combinations, which is convenient for realizing four-wheel drive; and the entire speed change system has a compact structure, high transmission efficiency, and reasonable speed arrangement.

[0004] The technical solution provided by the present invention is as follows:

[0005] A tractor transmission system, comprising: a reversing assembly, a main transmission assembly, an auxiliary transmission assembly and a crawler gear assembly arranged in sequence; the reversing assembly comprises an input shaft and a reverse gear intermediate shaft arranged in parallel; the input shaft is provided with an empty sleeve of a reverse gear driving gear and a forward gear driving gear, the input shaft is provided with a selection mechanism 1 which can be selectively connected with the reverse gear driving gear or the forward gear driving gear; the reverse gear intermediate shaft is provided with a reverse gear intermediate gear 1 and a reverse gear intermediate gear 2; the reverse gear intermediate gear 1 is meshedly connected with the reverse gear driving gear; the main transmission assembly comprises a Lo clutch, a Hi clutch and a plurality of main transmission transmission mechanisms; Path, any of the main speed transmission paths can be transmission-connected with the Lo clutch or the Hi clutch respectively; the Lo clutch is selectively transmission-connected with the forward gear driving gear or the reverse gear intermediate gear; the Hi clutch is selectively transmission-connected with the forward gear driving gear or the reverse gear intermediate gear; the auxiliary speed transmission assembly is provided with a plurality of auxiliary speed transmission paths; any of the main speed transmission paths is selectively transmission-connected with any of the auxiliary speed transmission paths; any of the main speed transmission paths can be selectively transmission-connected with the crawler gear assembly after being transmission-connected with any of the auxiliary speed transmission paths.

[0006] In the above technical solution, when the tractor encounters a large change in tillage resistance during operation, the high-speed and low-speed switching is achieved through power shifting, so that the tractor's driving speed can be changed. At the same time, the reversing assembly is arranged at the front end of the main transmission assembly, which increases the number of reverse gears and has a wider speed range. The present invention realizes the same number of forward gears and reverse gears of the tractor with a relatively compact space arrangement, and has a variety of power output speed combinations, which is convenient for realizing four-wheel drive; and the entire transmission system has a compact structure, high transmission efficiency, and reasonable speed arrangement. In actual application, the driver can change the tractor's driving speed through the high and low gear operating buttons, which not only improves the operating efficiency, reduces the driver's operating intensity, improves the operating comfort, but also does not increase the tractor cost too much.

[0007] Further, the main transmission assembly includes high and low gear spline shafts, a constant mesh gear shaft 2, a first shaft and a second shaft arranged in parallel; the high and low gear spline shafts are drivingly connected with the first shaft; the high and low gear spline shafts are sleeved with a Lo driven gear and a Hi driven gear; the constant mesh gear shaft 2 is provided with the Lo clutch and the Hi clutch; the constant mesh gear shaft 2 is sleeved with a Lo driving gear corresponding to the Lo clutch, and the Lo driving gear is meshed with the Lo driven gear; the constant mesh gear shaft 2 is sleeved with a Hi driving gear corresponding to the Hi clutch, and the Hi driving gear is meshed with the The Hi driven gear is meshed and connected; the one shaft is fixed with N driving gears, wherein the nth driving gear is the nth gear driving gear; the two shafts are free with N passive gears; wherein the nth passive gear is the nth gear passive gear; the two shafts are fixed with a selection mechanism that can be selectively connected with the nth gear passive gear or the (n-1)th gear passive gear, and each of the passive gears is correspondingly provided with a selection mechanism; the nth gear driving gears are meshed and connected with the nth gear passive gears one by one to form N main speed transmission paths; wherein N and n are both positive integers greater than 1, and n≤N.

[0008] Further, the idler sleeve of the first shaft has a fourth-speed driving gear, a third-speed driving gear, a second-speed driving gear and a first-speed driving gear; the idler sleeve of the second shaft has a fourth-speed driven gear, a third-speed driven gear, a second-speed driven gear and a first-speed driven gear; the second shaft is fixed with a selection mechanism 2 that can be selectively connected to the fourth-speed driven gear or the third-speed driven gear, and a selection mechanism 3 that can be selectively connected to the second-speed driven gear or the first-speed driven gear; the fourth-speed driving gear is meshed and connected with the fourth-speed driven gear to form a main speed transmission path; the third-speed driving gear is meshed and connected with the third-speed driven gear to form a main speed transmission path; the second-speed driving gear is meshed and connected with the second-speed driven gear to form a main speed transmission path; the first-speed driving gear is meshed and connected with the first-speed driven gear to form a main speed transmission path.

[0009] In the above technical solution, the tractor has 64 forward gears and 64 reverse gears, a total of 128 gears.

[0010] Furthermore, the selection mechanism adopts a synchronizer or a meshing sleeve.

[0011] Furthermore, the constant meshing gear shaft 2 is fixedly provided with an intermediate gear, and the intermediate gear is respectively meshed and connected with the forward gear driving gear and the reverse gear intermediate gear 2.

[0012] Further, the secondary transmission assembly includes a constant mesh gear shaft 1 and a secondary transmission driven shaft; the constant mesh gear shaft 1 is loosely sleeved with a constant mesh gear, a slow gear driving gear, a low gear driving gear and a mid-range driving gear; the second shaft is fixed with a second shaft gear; the secondary transmission driven shaft is loosely sleeved with a slow gear driven gear, a low gear driven gear and a mid-range driven gear; the third shaft is fixed with a selection mechanism 4 that can be selectively connected to the second shaft gear or the slow gear driven gear, and a selection mechanism 5 that can be selectively connected to the low gear driven gear or the mid-range driven gear; the constant mesh gear is meshed and connected with the second shaft gear to form a secondary speed transmission path; the slow gear driving gear is meshed and connected with the slow gear driven gear to form a secondary speed transmission path; the low gear driving gear is meshed and connected with the low gear driven gear to form a secondary speed transmission path; the mid-range driving gear is meshed and connected with the mid-range driven gear to form a secondary speed transmission path.

[0013] Further, the crawler gear assembly includes a crawler gear shaft and a small bevel gear shaft; the crawler gear shaft is provided with a crawler gear driven gear 1 and a crawler gear driven gear 2 in an empty sleeve; the auxiliary speed change driven shaft is fixed with an auxiliary speed change driven gear, and the auxiliary speed change driven gear is meshed and connected with the crawler gear driven gear 1; the small bevel gear shaft is fixed with a crawler gear engagement sleeve; the small bevel gear shaft is provided with a crawler gear driven gear in an empty sleeve, and the crawler gear driven gear is meshed and connected with the crawler gear driven gear 2; the crawler gear engagement sleeve can be selectively connected with the auxiliary speed change driven gear or the crawler gear driven gear.

[0014] Furthermore, the pinion gear shaft is drivingly connected to a differential; and the differential is drivingly connected to the final drive assembly.

[0015] Furthermore, the small bevel gear shaft is drivingly connected to the transfer case assembly.

[0016] The present invention further provides a tractor, comprising: a body and any one of the above-mentioned tractor speed change systems.

[0017] Compared with the prior art, the tractor speed change system and the tractor have the following beneficial effects:

[0018] (1) The present invention realizes 128 gears in total, including 64 forward gears and 64 reverse gears for a tractor with a relatively compact spatial arrangement. At the same time, it has multiple combinations of power output speeds, facilitating the implementation of four-wheel drive. Moreover, the entire transmission system has a compact structure, high transmission efficiency, and a reasonable speed arrangement. Meanwhile, the reversing assembly is arranged at the front end of the main transmission assembly, increasing the number of reverse gears and having a wider speed range. In practical applications, when the tractor encounters a large change in tillage resistance during operation, the high and low gears can be switched through power shift to change the driving speed of the tractor. This not only improves the operation efficiency, reduces the operation intensity of the driver, enhances the operation comfort, but also does not cause excessive increase in the cost of the tractor.

[0019] (2) Among the various assemblies (reversing assembly, main transmission assembly, auxiliary transmission assembly, and creeper gear assembly) of the present invention, by arranging a certain transmission component of one assembly on a certain component of another assembly (such as the second shaft gear of the auxiliary transmission assembly being arranged on the second shaft of the main transmission assembly, and the auxiliary transmission driven gear of the creeper gear assembly being arranged on the constant mesh gear shaft I, etc.), the transmission path between the various assemblies is greatly simplified, thereby further improving the structural compactness and transmission efficiency of this transmission system. Brief Description of the Drawings

[0020] The following will further illustrate the above characteristics, technical features, advantages and their implementation manners of a tractor transmission system and a tractor in a clear and easy-to-understand manner in combination with the drawings of the preferred embodiments.

[0021] Figure 1 It is a schematic structural diagram of an embodiment of the tractor transmission system of the present invention.

[0022] Explanation of the Reference Numerals in the Drawings:

[0023] 01. Input shaft, 1. Reverse drive gear, 1A. Selecting mechanism one, 2. Forward drive gear, 3. Lo driven gear, 4. Hi driven gear, 5. Fourth gear drive gear, 6. Third gear drive gear, 7. Second gear drive gear, 8. First gear drive gear, 9. Constant mesh gear, 10. Low speed drive gear, 11. Low gear drive gear, 12. Medium gear drive gear, 13. Crawler gear driven gear one, 14. Crawler gear driven gear two, 15. Reverse idler gear one, 16. Constant mesh gear shaft two, 17. Reverse idler gear two, 18. Lo drive gear, 19. Hi drive gear, 20. Fourth gear driven gear, 21. Selecting mechanism two, 22. Third gear driven gear, 23. Second gear driven gear, 24. Selecting mechanism three, 25. First gear driven gear, 26. Second shaft gear, 27. Selecting mechanism four, 28. Low speed driven gear, 29. Low gear driven gear, 30. Selecting mechanism five, 31. Medium gear driven gear, 32. Auxiliary transmission driven gear, 33. Crawler gear engaging sleeve, 34. Crawler gear driven gear, B. Lo clutch, C. Hi clutch, D. Transfer case assembly, E. Power take-off assembly, F. Final drive assembly. Detailed implementation

[0024] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0025] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or groups.

[0026] For the sake of simplicity of the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, for the sake of simplicity and easy understanding of the drawings, for components with the same structure or function in some figures, only one of them is schematically shown, or only one of them is labeled. In this article, "one" not only means "only this one", but also means "more than one" situation. In this article, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixedly connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0027] It should be further understood that the term "and / or" used in the specification and claims of the present application refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0028] In an embodiment of the present invention, such as Figure 1As shown in the figure, a tractor transmission system includes: a reversing assembly, a main transmission assembly, a sub-transmission assembly, and a creeper gear assembly arranged in sequence; the reversing assembly includes an input shaft 01 and a reverse intermediate shaft arranged in parallel; the input shaft 01 is sleeved with a reverse drive gear 1 and a forward drive gear 2, and the input shaft 01 is fixedly provided with a reverse drive gear 1A that can be selectively connected to the reverse drive gear 1 or the forward drive gear 2; the reverse intermediate shaft is fixedly provided with a first reverse intermediate gear 15 and a second reverse intermediate gear 17; the first reverse intermediate gear 15 is meshed and connected to the reverse drive gear 1; the main transmission assembly includes a Lo clutch B, a Hi clutch C, and multiple main transmission paths, and any one of the main transmission paths can be respectively transmission-connected to the Lo clutch B or the Hi clutch C; the Lo clutch B is selectively transmission-connected to the forward drive gear 2 or the second reverse intermediate gear 17; the Hi clutch C is selectively transmission-connected to the forward drive gear 2 or the second reverse intermediate gear 17; the sub-transmission assembly is provided with multiple sub-transmission paths; any one of the main transmission paths is selectively transmission-connected to any one of the sub-transmission paths; after any one of the main transmission paths is transmission-connected to any one of the sub-transmission paths, it can be selectively transmission-connected to the creeper gear assembly; preferably, the main transmission assembly includes a high-low gear spline shaft, a constant-mesh gear shaft two 16, a first shaft, and a second shaft arranged in parallel; the high-low gear spline shaft is transmission-connected to the first shaft; the high-low gear spline shaft is sleeved with a Lo driven gear 3 and a Hi driven gear 4; the constant-mesh gear shaft two 16 is provided with a Lo clutch B and a Hi clutch C; the constant-mesh gear shaft two 16 is sleeved with a Lo drive gear 18 corresponding to the Lo clutch B, and the Lo drive gear 18 is meshed and connected to the Lo driven gear 3; the constant-mesh gear shaft two 16 is sleeved with a Hi drive gear 19 corresponding to the Hi clutch C, and the Hi drive gear 19 is meshed and connected to the Hi driven gear 4; the first shaft is fixedly provided with N drive gears, where the nth drive gear is the nth gear drive gear; the second shaft is sleeved with N driven gears; where the nth driven gear is the nth gear driven gear; the second shaft is fixedly provided with a selection mechanism that can be selectively connected to the nth gear driven gear or the (n - 1)th gear driven gear, and each driven gear is provided with a selection mechanism; the nth gear drive gear is meshed and connected to the nth gear driven gear one by one to form N main transmission paths; where N and n are positive integers greater than 1, and n ≤ N. It should be noted that when a selection mechanism is provided between the nth gear driven gear and the (n - 1)th gear driven gear, then a selection mechanism does not need to be provided between the (n - 1)th gear driven gear and the (n - 2)th gear driven gear, but a selection mechanism is provided between the (n - 2)th gear driven gear and the (n - 3)th gear driven gear. At this time, N and n are positive integers greater than 3, and n ≤ N. Preferably, the selection mechanism adopts a synchronizer or a dog clutch.

[0029] Exemplarily, a four-speed driving gear 5, a three-speed driving gear 6, a two-speed driving gear 7, and a first-speed driving gear 8 are sleeved on a first shaft; a four-speed driven gear 20, a three-speed driven gear 22, a two-speed driven gear 23, and a first-speed driven gear 25 are sleeved on a second shaft; a second selecting mechanism 21 that can selectively connect with the four-speed driven gear 20 or the three-speed driven gear 22, and a third selecting mechanism 24 that can selectively connect with the two-speed driven gear 23 or the first-speed driven gear 25 are fixedly arranged on the second shaft; the four-speed driving gear 5 is meshed and connected with the four-speed driven gear 20 to form a main speed-changing transmission path; the three-speed driving gear 6 is meshed and connected with the three-speed driven gear 22 to form a main speed-changing transmission path; the two-speed driving gear 7 is meshed and connected with the two-speed driven gear 23 to form a main speed-changing transmission path; the first-speed driving gear 8 is meshed and connected with the first-speed driven gear 25 to form a main speed-changing transmission path. Further, an intermediate gear is fixedly arranged on a second constant-mesh gear shaft 16, and the intermediate gear is meshed and connected with a forward driving gear 2 and a reverse intermediate gear 17 respectively.

[0030] Preferably, the auxiliary transmission assembly includes a constant-mesh gear shaft one and an auxiliary transmission driven shaft; a constant-mesh gear 9, a low-speed gear driving gear 10, a low-gear driving gear 11, and a medium-gear driving gear 12 are sleeved on the constant-mesh gear shaft one; a second shaft gear 26 is fixedly arranged on the second shaft; a low-speed gear driven gear 28, a low-gear driven gear 29, and a medium-gear driven gear 31 are sleeved on the auxiliary transmission driven shaft; a selecting mechanism four 27 that can be selectively connected to the second shaft gear 26 or the low-speed gear driven gear 28, and a selecting mechanism five 30 that can be selectively connected to the low-gear driven gear 29 or the medium-gear driven gear 31 are fixedly arranged on the third shaft; the constant-mesh gear 9 is meshed with the second shaft gear 26 to form an auxiliary transmission path; the low-speed gear driving gear 10 is meshed with the low-speed gear driven gear 28 to form an auxiliary transmission path; the low-gear driving gear 11 is meshed with the low-gear driven gear 29 to form an auxiliary transmission path; the medium-gear driving gear 12 is meshed with the medium-gear driven gear 31 to form an auxiliary transmission path; preferably, the creeper gear assembly includes a creeper gear shaft and a small bevel gear shaft; a first creeper gear driven gear 13 and a second creeper gear driven gear 14 are sleeved on the creeper gear shaft; 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 creeper gear driven gear 13; a creeper gear engaging sleeve 33 is fixedly arranged on the small bevel gear shaft; a creeper gear driven gear 34 is sleeved on the small bevel gear shaft, and the creeper gear driven gear 34 is meshed with the second creeper gear driven gear 14; the creeper gear engaging sleeve 33 can be selectively connected to the auxiliary transmission driven gear 32 or the creeper gear driven gear 34; preferably, the bevel gear end of the small bevel gear shaft is drivingly connected to a differential; the differential is drivingly connected to a final drive assembly F. In practical applications, the driver can change the traveling speed of the tractor by operating the high / low gear buttons, i.e., (Lo clutch B and Hi clutch C), which not only improves the operation efficiency, reduces the operation intensity of the driver, but also improves the operation comfort. Preferably, the selecting mechanisms (selecting mechanism one 1A, selecting mechanism two 21, selecting mechanism three 24, selecting mechanism four 27, selecting mechanism five 30) are synchronizers. Of course, the selecting mechanism can also be an engaging sleeve.

[0031] In another embodiment of the present invention, as Figure 1 shown, different from the above embodiment, a certain transmission component of one assembly is not arranged on a certain component of another assembly (such as the second shaft gear of the auxiliary transmission assembly is arranged on the second shaft of the main transmission assembly, and the auxiliary transmission driven gear of the creeper gear assembly is arranged on the constant-mesh gear shaft one, etc.). The two assemblies in driving connection can also be drivingly connected through a gear pair, so as to realize that the components of each assembly are not arranged on a certain component of other assemblies. However, it should also fall within the protection scope of the present invention.

[0032] In another embodiment of the present invention, as Figure 1As shown, on the basis of the above embodiments, the high-low gear spline shaft and the first shaft are connected through a spline structure. Specifically, the high-low gear spline shaft is coaxially arranged with the first shaft, and a bearing is sleeved on the end of the high-low gear spline shaft close to the first shaft. The inner wall of the bearing is connected to the outer wall of the first shaft through a spline structure. Of course, in another embodiment, the high-low gear spline shaft can also be directly connected to the first shaft through a spline structure. The high-low gear spline shaft and the first shaft can also be the same shaft. Further, the input shaft is coaxially arranged with the high-low gear spline shaft and connected through a spline structure. Further, bearings are sleeved on both ends of the input shaft, reverse intermediate shaft, high-low gear spline shaft, first shaft, constant-mesh gear shaft II, second shaft, constant-mesh gear shaft I, auxiliary transmission driven shaft, crawler gear shaft, and small bevel gear shaft to reduce the wear of each shaft component and extend its service life. Further, the input shaft, high-low gear spline shaft, first shaft, constant-mesh gear shaft I, and crawler gear shaft are coaxially arranged; the constant-mesh gear shaft II, second shaft, auxiliary transmission driven shaft, and small bevel gear shaft are coaxially arranged; such that the entire transmission system only needs to arrange three coaxially arranged shaft systems (multiple shafts coaxially arranged with the input shaft, multiple shafts coaxially arranged with the constant-mesh gear shaft II, and the reverse intermediate shaft), with a very compact structure, high transmission efficiency, and convenient operation.

[0033] In another embodiment of the present invention, as Figure 1 shown, on the basis of the above embodiments, the small bevel gear shaft is drivingly connected to the transfer case assembly D.

[0034] In another embodiment of the present invention, as Figure 1 shown, on the basis of the above embodiments, a power output assembly E is further included.

[0035] Exemplarily, as Figure 1As shown in the figure, synchronizers are adopted for the selection mechanisms of the reversing assembly, the main transmission assembly, and the auxiliary transmission assembly of this transmission system. The creep gear assembly adopts a sliding gear shifting structure. The clutches (Lo clutch B, Hi clutch C) are electro-hydraulically controlled wet multi-disc clutches; the Lo driven gear 3 and the Hi driven gear 4 are of an integral structure or form an integral structure due to connection by connecting parts; the fourth gear driving gear 5, the third gear driving gear 6, the second gear driving gear 7, and the first gear driving gear 8 are of an integral structure or form an integral structure due to connection by connecting parts; the constant mesh gear 9, the slow gear driving gear 10, the low gear driving gear 11, and the medium gear driving gear 12 are of an integral structure or form an integral structure due to connection by connecting parts; the creep gear driven gear one 13 and the creep gear driven gear two 14 are of an integral structure or form an integral structure due to connection by connecting parts; the second shaft and the second shaft gear 26 are of an integral structure or form an integral structure due to connection by connecting parts; the constant mesh gear shaft one and the constant mesh gear 9 are of an integral structure or form an integral structure due to connection by connecting parts; by operating the high / low gear control button, the driving speed of the tractor can be changed, and 128 gears in total, including 64 forward gears and 64 reverse gears, can be achieved with a relatively compact space layout. At the same time, there are multiple power output speed combinations of 540 / 760 / 1000 rpm, and four-wheel drive can be conveniently achieved. The specific transmission path is as follows:

[0036] Forward gear transmission route:

[0037] (1) Transmission route without attaching the creep device

[0038] 1. First gear forward (Lo - high speed): Input shaft 01 → Selection mechanism one 1A → Forward gear driving gear 2 engaged → Constant mesh gear shaft two 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → First gear driving gear 8 → First gear driven gear 25 → Selection mechanism three 24 → Second shaft → Selection mechanism four 27 → Auxiliary transmission driven shaft → Creep gear sliding gear 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0039] 2. Second gear forward (Lo - high speed): Input shaft 01 → Selection mechanism one 1A → Forward gear driving gear 2 engaged → Constant mesh gear shaft two 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Second gear driving gear 7 → Second gear driven gear 23 → Selection mechanism three 24 → Second shaft → Selection mechanism four 27 → Auxiliary transmission driven shaft → Creep gear sliding gear 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0040] 3. Third gear forward (Lo - high speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism two 21 → Second shaft → Selecting mechanism four 27 → Auxiliary transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0041] 4. Fourth gear forward (Lo - high speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism two 21 → Second shaft → Selecting mechanism four 27 → Auxiliary transmission driven shaft (32) → Crawler - gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0042] 5. First gear forward (Lo - medium speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → First - gear driving gear 8 → First - gear driven gear 25 → Selecting mechanism three 24 → Second shaft → Constant mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism five 30 → Auxiliary transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0043] 6. Second gear forward (Lo - medium speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism five 30 → Auxiliary transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0044] 7. Third gear forward (Lo - medium speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism two 21 → Second - shaft gear 26 → Constant mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism five 30 → Auxiliary transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0045] 8. Fourth forward gear (Lo - medium speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft II 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism 21 → Countershaft gear 26 → Constant mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism 30 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0046] 9. First forward gear (Lo - low speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft II 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism 24 → Countershaft gear 26 → Constant mesh gear 9 → Low - speed driving gear 11 → Low - speed driven gear 29 → Selecting mechanism 30 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0047] 10. Second forward gear (Lo - low speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft II 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism 24 → Countershaft gear 26 → Constant mesh gear 9 → Low - speed driving gear 11 → Low - speed driven gear 29 → Selecting mechanism 30 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0048] 11. Third forward gear (Lo - low speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft II 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism 21 → Countershaft gear 26 → Constant mesh gear 9 → Low - speed driving gear 11 → Low - speed driven gear 29 → Selecting mechanism 30 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0049] 12. Fourth forward gear (Lo - low speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft II 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism 21 → Countershaft gear 26 → Constant mesh gear 9 → Low - speed driving gear 11 → Low - speed driven gear 29 → Selecting mechanism 30 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0050] 13. First forward gear (Lo - slow speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → First - gear driving gear 8 → First - gear driven gear 25 → Selecting mechanism 24 → Second - shaft gear 26 → Constant mesh gear 9 → Slow - gear driving gear 10 → Slow - gear driven gear 28 → Selecting mechanism 27 → Counter - shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0051] 14. Second forward gear (Lo - slow speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism 24 → Second - shaft gear 26 → Constant mesh gear 9 → Slow - gear driving gear 10 → Slow - gear driven gear 28 → Selecting mechanism 27 → Counter - shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0052] 15. Third forward gear (Lo - slow speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism 21 → Second - shaft gear 26 → Constant mesh gear 9 → Slow - gear driving gear 10 → Slow - gear driven gear 28 → Selecting mechanism 27 → Counter - shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0053] 16. Fourth forward gear (Lo - slow speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism 21 → Second - shaft gear 26 → Constant mesh gear 9 → Slow - gear driving gear 10 → Slow - gear driven gear 28 → Selecting mechanism 27 → Counter - shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0054] 17. First forward gear (Hi - high speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → First - gear driving gear 8 → First - gear driven gear 25 → Selecting mechanism 24 → Second - shaft → Selecting mechanism 27 → Counter - shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0055] 18. Second forward gear (Hi - high speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant - mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism three 24 → Second shaft → Selecting mechanism four 27 → Auxiliary transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0056] 19. Third forward gear (Hi - high speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant - mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism two 21 → Second shaft → Selecting mechanism four 27 → Auxiliary transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0057] 20. Fourth forward gear (Hi - high speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant - mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism two 21 → Second shaft → Selecting mechanism four 27 → Auxiliary transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0058] 21. First forward gear (Hi - medium speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant - mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → First - gear driving gear 8 → First - gear driven gear 25 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant - mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism five 30 → Auxiliary transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0059] 22. Second forward gear (Hi - medium speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant - mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant - mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism five 30 → Auxiliary transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0060] 23. Third forward gear (Hi - medium speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant - mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism two 21 → Second - shaft gear 26 → Constant - mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism five 30 → Auxiliary - transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0061] 24. Fourth forward gear (Hi - medium speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant - mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism two 21 → Second - shaft gear 26 → Constant - mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism five 30 → Auxiliary - transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0062] 25. First forward gear (Hi - low speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant - mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant - mesh gear 9 → Low - speed driving gear 11 → Low - speed driven gear 29 → Selecting mechanism five 30 → Auxiliary - transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0063] 26. Second forward gear (Hi - low speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant - mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant - mesh gear 9 → Low - speed driving gear 11 → Low - speed driven gear 29 → Selecting mechanism five 30 → Auxiliary - transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0064] 27. Third forward gear (Hi - low speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant - mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism two 21 → Second - shaft gear 26 → Constant - mesh gear 9 → Low - speed driving gear 11 → Low - speed driven gear 29 → Selecting mechanism five 30 → Auxiliary - transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0065] 28. Fourth forward gear (Hi - low speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant - mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism two 21 → Second - shaft gear 26 → Constant - mesh gear 9 → Low - gear driving gear 11 → Low - gear driven gear 29 → Selecting mechanism five 30 → Sub - transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0066] 29. First forward gear (Hi - slow speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant - mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → First - gear driving gear 8 → First - gear driven gear 25 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant - mesh gear 9 → Slow - gear driving gear 10 → Slow - gear driven gear 28 → Selecting mechanism four 27 → Sub - transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0067] 30. Second forward gear (Hi - slow speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant - mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant - mesh gear 9 → Slow - gear driving gear 10 → Slow - gear driven gear 28 → Selecting mechanism four 27 → Sub - transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0068] 31. Third forward gear (Hi - slow speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant - mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism two 21 → Second - shaft gear 26 → Constant - mesh gear 9 → Slow - gear driving gear 10 → Slow - gear driven gear 28 → Selecting mechanism four 27 → Sub - transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0069] 32. Fourth forward gear (Hi - slow speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant - mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism two 21 → Second - shaft gear 26 → Constant - mesh gear 9 → Slow - gear driving gear 10 → Slow - gear driven gear 28 → Selecting mechanism four 27 → Sub - transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final

[0070] (1) Transmission route of the hanging crawling device

[0071] 1. First forward gear (Hi - high speed): Input shaft 01 → Selection mechanism 1A → Engagement of forward gear driving gear 2 → Constant mesh gear shaft 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → First - gear driving gear 8 → First - gear driven gear 25 → Selection mechanism 24 → Second shaft → Selection mechanism 27 → Auxiliary transmission driven gear 32 → Crawler - gear driven gear 13 → Crawler - gear driven gear 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0072] 2. Second forward gear (Hi - high speed): Input shaft 01 → Selection mechanism 1A → Engagement of forward gear driving gear 2 → Constant mesh gear shaft 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selection mechanism 24 → Second shaft → Selection mechanism 27 → Auxiliary transmission driven gear 32 → Crawler - gear driven gear 13 → Crawler - gear driven gear 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0073] 3. Third forward gear (Hi - high speed): Input shaft 01 → Selection mechanism 1A → Engagement of forward gear driving gear 2 → Constant mesh gear shaft 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selection mechanism 24 → Second shaft → Selection mechanism 27 → Auxiliary transmission driven gear 32 → Crawler - gear driven gear 13 → Crawler - gear driven gear 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0074] 4. Fourth forward gear (Hi - high speed): Input shaft 01 → Selection mechanism 1A → Engagement of forward gear driving gear 2 → Constant mesh gear shaft 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selection mechanism 24 → Second shaft → Selection mechanism 27 → Auxiliary transmission driven gear 32 → Crawler - gear driven gear 13 → Crawler - gear driven gear 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0075] 5. First forward gear (Hi - medium speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → First - gear driving gear 8 → First - gear driven gear 25 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism five 30 → Auxiliary - transmission driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0076] 6. Second forward gear (Hi - medium speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism five 30 → Auxiliary - transmission driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0077] 7. Third forward gear (Hi - medium speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism five 30 → Auxiliary - transmission driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0078] 8. Fourth forward gear (Hi - medium speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism five 30 → Auxiliary - transmission driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0079] 9. First forward gear (Hi - low speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → First - gear driving gear 8 → First - gear driven gear 25 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant mesh gear 9 → Low - gear driving gear 11 → Low - gear driven gear 29 → Selecting mechanism five 30 → Auxiliary - transmission driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0080] 10. Second forward gear (Hi - low speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant mesh gear 9 → Low - gear driving gear 11 → Low - gear driven gear 29 → Selecting mechanism five 30 → Auxiliary - transmission driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0081] 11. Third forward gear (Hi - low speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant mesh gear 9 → Low - gear driving gear 11 → Low - gear driven gear 29 → Selecting mechanism five 30 → Auxiliary - transmission driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0082] 12. Fourth forward gear (Hi - low speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant mesh gear 9 → Low - gear driving gear 11 → Low - gear driven gear 29 → Selecting mechanism five 30 → Auxiliary - transmission driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0083] 13. First forward gear (Hi - slow speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → First - gear driving gear 8 → First - gear driven gear 25 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant mesh gear 9 → Slow - gear driving gear 10 → Slow - gear driven gear 28 → Selecting mechanism four 27 → Auxiliary - transmission driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0084] 14. Second forward gear (Hi - slow speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant mesh gear 9 → Slow - gear driving gear 10 → Slow - gear driven gear 28 → Selecting mechanism four 27 → Auxiliary - transmission driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0085] 15. Third forward gear (Hi - slow speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism two 21 → Second - shaft gear 26 → Constant mesh gear 9 → Slow - gear driving gear 10 → Slow - gear driven gear 28 → Selecting mechanism four 27 → Auxiliary - transmission driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0086] 16. Fourth forward gear (Hi - slow speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism two 21 → Second - shaft gear 26 → Constant mesh gear 9 → Slow - gear driving gear 10 → Slow - gear driven gear 28 → Selecting mechanism four 27 → Auxiliary - transmission driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0087] 17. First forward gear (Lo - high speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → First - gear driving gear 8 → First - gear driven gear 25 → Selecting mechanism three 24 → Second shaft → Selecting mechanism four 27 → Auxiliary transmission driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0088] 18. Second forward gear (Lo - high speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism three 24 → Second shaft → Selecting mechanism four 27 → Auxiliary transmission driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0089] 19. Third forward gear (Lo - high speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism two 21 → Second shaft → Selecting mechanism four 27 → Auxiliary transmission driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0090] 20. Fourth forward gear (Lo - high speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism two 21 → Second shaft → Selecting mechanism four 27 → Auxiliary transmission driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0091] 21. First forward gear (Lo - medium speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → First - gear driving gear 8 → First - gear driven gear 25 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism five 30 → Auxiliary - speed driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0092] 22. Second forward gear (Lo - medium speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism five 30 → Auxiliary - speed driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0093] 23. Third forward gear (Lo - medium speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism two 21 → Second - shaft gear 26 → Constant mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism five 30 → Auxiliary - speed driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0094] 24. Fourth forward gear (Lo - medium speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant mesh gear shaft two 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism two 21 → Second - shaft gear 26 → Constant mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism five 30 → Auxiliary - speed driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final drive assembly F.

[0095] 25. First forward gear (Lo - low speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant - mesh gear shaft two 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant - mesh gear 9 → Low - gear driving gear 11 → Low - gear driven gear 29 → Selecting mechanism five 30 → Auxiliary - transmission driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft

[0096] → Differential → Final - drive assembly F.

[0097] 26. Second forward gear (Lo - low speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant - mesh gear shaft two 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant - mesh gear 9 → Low - gear driving gear 11 → Low - gear driven gear 29 → Selecting mechanism five 30 → Auxiliary - transmission driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0098] 27. Third forward gear (Lo - low speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant - mesh gear shaft two 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism two 21 → Second - shaft gear 26 → Constant - mesh gear 9 → Low - gear driving gear 11 → Low - gear driven gear 29 → Selecting mechanism five 30 → Auxiliary - transmission driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0099] 28. Fourth forward gear (Lo - low speed): Input shaft 01 → Selecting mechanism 1A → Forward driving gear 2 engaged → Constant - mesh gear shaft two 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism two 21 → Second - shaft gear 26 → Constant - mesh gear 9 → Low - gear driving gear 11 → Low - gear driven gear 29 → Selecting mechanism five 30 → Auxiliary - transmission driven gear 32 → Crawler - gear driven gear one 13 → Crawler - gear driven gear two 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0100] 29. First gear forward (Lo - slow speed): Input shaft 01 → Selecting mechanism 1A → Forward gear driving gear 2 engaged → Constant mesh gear shaft II 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → First gear driving gear 8 → First gear driven gear 25 → Selecting mechanism 24 → Second shaft gear 26 → Constant mesh gear 9 → Low speed driving gear 10 → Low speed driven gear 28 → Selecting mechanism 27 → Auxiliary transmission driven gear 32 → Crawler gear driven gear I 13 → Crawler gear driven gear II 14 → Crawler gear driven gear 34 → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0101] 30. Second gear forward (Lo - slow speed): Input shaft 01 → Selecting mechanism 1A → Forward gear driving gear 2 engaged → Constant mesh gear shaft II 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Second gear driving gear 7 → Second gear driven gear 23 → Selecting mechanism 24 → Second shaft gear 26 → Constant mesh gear 9 → Low speed driving gear 10 → Low speed driven gear 28 → Selecting mechanism 27 → Auxiliary transmission driven gear 32 → Crawler gear driven gear I 13 → Crawler gear driven gear II 14 → Crawler gear driven gear 34 → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0102] 31. Third gear forward (Lo - slow speed): Input shaft 01 → Selecting mechanism 1A → Forward gear driving gear 2 engaged → Constant mesh gear shaft II 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Third gear driving gear 6 → Third gear driven gear 22 → Selecting mechanism 21 → Second shaft gear 26 → Constant mesh gear 9 → Low speed driving gear 10 → Low speed driven gear 28 → Selecting mechanism 27 → Auxiliary transmission driven gear 32 → Crawler gear driven gear I 13 → Crawler gear driven gear II 14 → Crawler gear driven gear 34 → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0103] 32. Fourth gear forward (Lo - slow speed): Input shaft 01 → Selecting mechanism 1A → Forward gear driving gear (2) engaged → Constant mesh gear shaft II 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Fourth gear driving gear 5 → Fourth gear driven gear 20 → Selecting mechanism 21 → Second shaft gear 26 → Constant mesh gear 9 → Low speed driving gear 10 → Low speed driven gear 28 → Selecting mechanism 27 → Auxiliary transmission driven gear 32 → Crawler gear driven gear I 13 → Crawler gear driven gear II 14 → Crawler gear driven gear 34 → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0104] Reverse gear transmission route:

[0105] (1) Transmission route for engaging the crawler device

[0106] 1. Low - High in First Reverse Gear: Input Shaft 01 → Selecting Mechanism 1A → Reverse Driving Gear 1 → Reverse Intermediate Gear 1 15 → Reverse Intermediate Gear 2 17 → Constant Mesh Gear Shaft 2 16 → Low Clutch B → Low Driving Gear 18 → Low Driven Gear 3 → First Driving Gear 8 → First Driven Gear 25 → Selecting Mechanism 3 24 → Second Shaft → Selecting Mechanism 4 27 → Auxiliary Transmission Driven Gear 32 → Crawler Gear 1 13 → Crawler Gear 2 14 → Crawler Gear 34 → Crawler Mesh Sleeve 33 → Small Bevel Gear Shaft → Differential → Final Drive Assembly F.

[0107] 2. Low - High in Second Reverse Gear: Input Shaft 01 → Selecting Mechanism 1A → Reverse Driving Gear 1 → Reverse Intermediate Gear 1 15 → Reverse Intermediate Gear 2 17 → Constant Mesh Gear Shaft 2 16 → Low Clutch B → Low Driving Gear 18 → Low Driven Gear 3 → Second Driving Gear 7 → Second Driven Gear 23 → Selecting Mechanism 3 24 → Second Shaft → Selecting Mechanism 4 27 → Auxiliary Transmission Driven Shaft (32) → Crawler Gear 1 13 → Crawler Gear 2 14 → Crawler Gear 34 → Crawler Mesh Sleeve 33 → Small Bevel Gear Shaft → Differential → Final Drive Assembly F.

[0108] 3. Low - High in Third Reverse Gear: Input Shaft 01 → Selecting Mechanism 1A → Reverse Driving Gear 1 → Reverse Intermediate Gear 1 15 → Reverse Intermediate Gear 2 17 → Constant Mesh Gear Shaft 2 16 → Low Clutch B → Low Driving Gear 18 → Low Driven Gear 3 → Third Driving Gear 6 → Third Driven Gear 22 → Selecting Mechanism 2 21 → Second Shaft → Selecting Mechanism 4 27 → Auxiliary Transmission Driven Gear 32 → Crawler Gear 1 13 → Crawler Gear 2 14 → Crawler Gear 34 → Crawler Mesh Sleeve 33 → Small Bevel Gear Shaft → Differential → Final Drive Assembly F.

[0109] 4. Low - High in Fourth Reverse Gear: Input Shaft 01 → Selecting Mechanism 1A → Reverse Driving Gear 1 → Reverse Intermediate Gear 1 15 → Reverse Intermediate Gear 2 17 → Constant Mesh Gear Shaft 2 16 → Low Clutch B → Low Driving Gear 18 → Low Driven Gear 3 → Fourth Driving Gear 5 → Fourth Driven Gear 20 → Selecting Mechanism 2 21 → Second Shaft → Selecting Mechanism 4 27 → Auxiliary Transmission Driven Gear 32 → Crawler Gear 1 13 → Crawler Gear 2 14 → Crawler Gear 34 → Crawler Mesh Sleeve 33 → Small Bevel Gear Shaft → Differential → Final Drive Assembly F.

[0110] 5. Low - Medium Speed in First Reverse Gear: Input Shaft 01 → Selecting Mechanism 1A → Reverse Driving Gear 1 → First Reverse Intermediate Gear 15 → Second Reverse Intermediate Gear 17 → Constant Mesh Gear Shaft 2 16 → Lo Clutch B → Lo Driving Gear 18 → Lo Driven Gear 3 → First Gear Driving Gear 8 → First Gear Driven Gear 25 → Selecting Mechanism 3 24 → Countershaft Gear 26 → Constant Mesh Gear 9 → Medium Speed Driving Gear 12 → Medium Speed Driven Gear 31 → Selecting Mechanism 5 30 → Auxiliary Transmission Driven Gear 32 → First Crawler Gear 13 → Second Crawler Gear 14 → Crawler Gear 34 → Crawler Mesh Sleeve 33 → Small Bevel Gear Shaft → Differential → Final Drive Assembly F.

[0111] 6. Low - Medium Speed in Second Reverse Gear: Input Shaft 01 → Selecting Mechanism 1A → Reverse Driving Gear 1 → First Reverse Intermediate Gear 15 → Second Reverse Intermediate Gear 17 → Constant Mesh Gear Shaft 2 16 → Lo Clutch B → Lo Driving Gear 18 → Lo Driven Gear 3 → Second Gear Driving Gear 7 → Second Gear Driven Gear 23 → Selecting Mechanism 3 24 → Countershaft Gear 26 → Constant Mesh Gear 9 → Medium Speed Driving Gear 12 → Medium Speed Driven Gear 31 → Selecting Mechanism 5 30 → Auxiliary Transmission Driven Gear 32 → First Crawler Gear 13 → Second Crawler Gear 14 → Crawler Gear 34 → Crawler Mesh Sleeve 33 → Small Bevel Gear Shaft → Differential → Final Drive Assembly F.

[0112] 7. Low - Medium Speed in Third Reverse Gear: Input Shaft 01 → Selecting Mechanism 1A → Reverse Driving Gear 1 → First Reverse Intermediate Gear 15 → Second Reverse Intermediate Gear 17 → Constant Mesh Gear Shaft 2 16 → Lo Clutch B → Lo Driving Gear 18 → Lo Driven Gear 3 → Third Gear Driving Gear 6 → Third Gear Driven Gear 22 → Selecting Mechanism 2 21 → Countershaft Gear 26 → Constant Mesh Gear 9 → Medium Speed Driving Gear 12 → Medium Speed Driven Gear 31 → Selecting Mechanism 5 30 → Auxiliary Transmission Driven Gear 32 → First Crawler Gear 13 → Second Crawler Gear 14 → Crawler Gear 34 → Crawler Mesh Sleeve 33 → Small Bevel Gear Shaft → Differential → Final Drive Assembly F.

[0113] 8. Low - Medium Speed in Fourth Reverse Gear: Input Shaft 01 → Selecting Mechanism 1A → Reverse Driving Gear 1 → First Reverse Intermediate Gear 15 → Second Reverse Intermediate Gear 17 → Constant Mesh Gear Shaft 2 16 → Lo Clutch B → Lo Driving Gear 18 → Lo Driven Gear 3 → Fourth Gear Driving Gear 5 → Fourth Gear Driven Gear 20 → Selecting Mechanism 2 21 → Countershaft Gear 26 → Constant Mesh Gear 9 → Medium Speed Driving Gear 12 → Medium Speed Driven Gear 31 → Selecting Mechanism 5 30 → Auxiliary Transmission Driven Gear 32 → First Crawler Gear 13 → Second Crawler Gear 14 → Crawler Gear 34 → Crawler Mesh Sleeve 33 → Small Bevel Gear Shaft → Differential → Final Drive Assembly F.

[0114] 9. First reverse gear (Lo - low speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → First gear driving gear 8 → First gear driven gear 25 → Selecting mechanism 3 24 → Second shaft gear 26 → Constant mesh gear 9 → Low gear driving gear 11 → Low gear driven gear 29 → Selecting mechanism 5 30 → Auxiliary 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.

[0115] 10. Second reverse gear (Lo - low speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Second gear driving gear 7 → Second gear driven gear 23 → Selecting mechanism 3 24 → Second shaft gear 26 → Constant mesh gear 9 → Low gear driving gear 11 → Low gear driven gear 29 → Selecting mechanism 5 30 → Auxiliary 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.

[0116] 11. Third reverse gear (Lo - low speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Third gear driving gear 6 → Third gear driven gear 22 → Selecting mechanism 2 21 → Second shaft gear 26 → Constant mesh gear 9 → Low gear driving gear 11 → Low gear driven gear 29 → Selecting mechanism 5 30 → Auxiliary 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.

[0117] 12. Fourth reverse gear (Lo - low speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Fourth gear driving gear 5 → Fourth gear driven gear 20 → Selecting mechanism 2 21 → Second shaft gear 26 → Constant mesh gear 9 → Medium gear driving gear 12 → Medium gear driven gear 31 → Selecting mechanism 5 30 → Auxiliary 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.

[0118] 13. Low - speed reverse gear in first gear: Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant - mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → First - gear driving gear 8 → First - gear driven gear 25 → Selecting mechanism 3 24 → Second - shaft gear 26 → Constant - mesh gear 9 → Low - speed driving gear 10 → Low - speed driven gear 28 → Selecting mechanism 4 27 → Auxiliary - speed driven gear 32 → First crawler - gear driven gear 13 → Second crawler - gear driven gear 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0119] 14. Low - speed reverse gear in second gear: Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant - mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism 3 24 → Second - shaft gear 26 → Constant - mesh gear 9 → Low - speed driving gear 10 → Low - speed driven gear 28 → Selecting mechanism 4 27 → Auxiliary - speed driven gear 32 → First crawler - gear driven gear 13 → Second crawler - gear driven gear 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0120] 15. Low - speed reverse gear in third gear: Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant - mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism 2 21 → Second - shaft gear 26 → Constant - mesh gear 9 → Low - speed driving gear 10 → Low - speed driven gear 28 → Selecting mechanism 4 27 → Auxiliary - speed driven gear 32 → First crawler - gear driven gear 13 → Second crawler - gear driven gear 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0121] 16. Fourth gear reverse (Lo - slow speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → Reverse intermediate gear 15 → Reverse intermediate gear 17 → Constant mesh gear shaft 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Fourth gear driving gear 5 → Fourth gear driven gear 20 → Selecting mechanism 21 → Second shaft gear 26 → Constant mesh gear 9 → Low speed driving gear 10 → Low speed driven gear 28 → Selecting mechanism 27 → Auxiliary transmission driven gear 32 → Crawler gear driven gear 13 → Crawler gear driven gear 14 → Crawler gear driven gear 34 → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0122] 17. First gear reverse (Hi - high speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → Reverse intermediate gear 15 → Reverse intermediate gear 17 → Constant mesh gear shaft 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → First gear driving gear 8 → First gear driven gear 25 → Selecting mechanism 24 → Second shaft → Selecting mechanism 27 → Auxiliary transmission driven gear 32 → Crawler gear driven gear 13 → Crawler gear driven gear 14 → Crawler gear driven gear 34 → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0123] 18. Second gear reverse (Hi - high speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → Reverse intermediate gear 15 → Reverse intermediate gear 17 → Constant mesh gear shaft 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Second gear driving gear 7 → Second gear driven gear 23 → Selecting mechanism 24 → Second shaft → Selecting mechanism 27 → Auxiliary transmission driven gear 32 → Crawler gear driven gear 13 → Crawler gear driven gear 14 → Crawler gear driven gear 34 → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0124] 19. Third gear reverse (Hi - high speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → Reverse intermediate gear 15 → Reverse intermediate gear 17 → Constant mesh gear shaft 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Third gear driving gear 6 → Third gear driven gear 22 → Selecting mechanism 21 → Second shaft → Selecting mechanism 27 → Auxiliary transmission driven gear 32 → Crawler gear driven gear 13 → Crawler gear driven gear 14 → Crawler gear driven gear 34 → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0125] 20. Fourth gear reverse (Hi - high speed): Input shaft 01 → Selection mechanism 1A → Reverse driving gear 1 → Reverse intermediate gear 1 15 → Reverse intermediate gear 2 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Fourth gear driving gear 5 → Fourth gear driven gear 20 → Selection mechanism 2 21 → Second shaft → Selection mechanism 4 27 → Auxiliary transmission driven gear 32 → Crawler gear driven gear 1 13 → Crawler gear driven gear 2 14 → Crawler gear driven gear 34 → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0126] 21. First gear reverse (Hi - medium speed): Input shaft 01 → Selection mechanism 1A → Reverse driving gear 1 → Reverse intermediate gear 1 15 → Reverse intermediate gear 2 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → First gear driving gear 8 → First gear driven gear 25 → Selection mechanism 3 24 → Second shaft gear 26 → Constant mesh gear 9 → Medium speed driving gear 12 → Medium speed driven gear 31 → Selection mechanism 5 30 → Auxiliary transmission driven gear 32 → Crawler gear driven gear 1 13 → Crawler gear driven gear 2 14 → Crawler gear driven gear 34 → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0127] 22. Second gear reverse (Hi - medium speed): Input shaft 01 → Selection mechanism 1A → Reverse driving gear 1 → Reverse intermediate gear 1 15 → Reverse intermediate gear 2 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Second gear driving gear 7 → Second gear driven gear 23 → Selection mechanism 3 24 → Second shaft gear 26 → Constant mesh gear 9 → Medium speed driving gear 12 → Medium speed driven gear 31 → Selection mechanism 5 30 → Auxiliary transmission driven gear 32 → Crawler gear driven gear 1 13 → Crawler gear driven gear 2 14 → Crawler gear driven gear 34 → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0128] 23. Third gear reverse (Hi - medium speed): Input shaft 01 → Selection mechanism 1A → Reverse driving gear 1 → Reverse intermediate gear 1 15 → Reverse intermediate gear 2 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Third gear driving gear 6 → Third gear driven gear 22 → Selection mechanism 2 21 → Second shaft gear 26 → Constant mesh gear 9 → Medium speed driving gear 12 → Medium speed driven gear 31 → Selection mechanism 5 30 → Auxiliary transmission driven gear 32 → Crawler gear driven gear 1 13 → Crawler gear driven gear 2 14 → Crawler gear driven gear 34 → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0129] 24. Fourth reverse gear (Hi - medium speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism 2 21 → Second shaft gear 26 → Constant mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism 5 30 → Auxiliary 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.

[0130] 25. First reverse gear (Hi - low speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → First - gear driving gear 8 → First - gear driven gear 25 → Selecting mechanism 3 24 → Second shaft gear 26 → Constant mesh gear 9 → Low - speed driving gear 11 → Low - speed driven gear 29 → Selecting mechanism 5 30 → Auxiliary 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.

[0131] 26. Second reverse gear (Hi - low speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism 3 24 → Second shaft gear 26 → Constant mesh gear 9 → Low - speed driving gear 11 → Low - speed driven gear 29 → Selecting mechanism 5 30 → Auxiliary 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.

[0132] 27. Third reverse gear (Hi - low speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism 2 21 → Second shaft gear 26 → Constant mesh gear 9 → Low - speed driving gear 11 → Low - speed driven gear 29 → Selecting mechanism 5 30 → Auxiliary 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.

[0133] 28. Fourth reverse gear (Hi - high speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism 2 21 → Second shaft gear 26 → Constant mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism 5 30 → Auxiliary 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.

[0134] 29. First reverse gear (Hi - low speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → First - gear driving gear 8 → First - gear driven gear 25 → Selecting mechanism 3 24 → Second shaft gear 26 → Constant mesh gear 9 → Low - speed driving gear 10 → Low - speed driven gear 28 → Selecting mechanism 4 27 → Auxiliary 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.

[0135] 30. Second reverse gear (Hi - low speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism 3 24 → Second shaft gear 26 → Constant mesh gear 9 → Low - speed driving gear 10 → Low - speed driven gear 28 → Selecting mechanism 4 27 → Auxiliary 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.

[0136] 31. Third reverse gear (Hi - low speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism 2 21 → Second shaft gear 26 → Constant mesh gear 9 → Low - speed driving gear 10 → Low - speed driven gear 28 → Selecting mechanism 4 27 → Auxiliary 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.

[0137] 32. Fourth reverse gear (Hi - slow speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant - mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism 2 21 → Second - shaft gear 26 → Constant - mesh gear 9 → Slow - speed driving gear 10 → Slow - speed driven gear 28 → Selecting mechanism 4 27 → Auxiliary - transmission driven gear 32 → First crawler - gear driven gear 13 → Second crawler - gear driven gear 14 → Crawler - gear driven gear 34 → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0138] (2) Transmission route without attached crawler device

[0139] 1. First reverse gear (Lo - high speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant - mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → First - gear driving gear 8 → First - gear driven gear 25 → Selecting mechanism 3 24 → Second shaft → Selecting mechanism 4 27 → Auxiliary - transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0140] 2. Second reverse gear (Lo - high speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant - mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism 3 24 → Second shaft → Selecting mechanism 4 27 → Auxiliary - transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0141] 3. Third reverse gear (Lo - high speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant - mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism 2 21 → Second shaft → Selecting mechanism 4 27 → Auxiliary - transmission driven shaft → Crawler - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0142] 4. Fourth reverse gear (Lo - high speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → Reverse intermediate gear 1 15 → Reverse intermediate gear 2 17 → Constant mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism 2 21 → Second shaft → Selecting mechanism 4 27 → Auxiliary transmission driven shaft → Crawling gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0143] 5. First reverse gear (Lo - medium speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → Reverse intermediate gear 1 15 → Reverse intermediate gear 2 17 → Constant mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → First - gear driving gear 8 → First - gear driven gear 25 → Selecting mechanism 3 24 → Second - shaft gear 26 → Constant mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism 5 30 → Auxiliary transmission driven shaft → Crawling gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0144] 6. Second reverse gear (Lo - medium speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → Reverse intermediate gear 1 15 → Reverse intermediate gear 2 17 → Constant mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism 3 24 → Second - shaft gear 26 → Constant mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism 5 30 → Auxiliary transmission driven shaft → Crawling gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0145] 7. Third reverse gear (Lo - medium speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → Reverse intermediate gear 1 15 → Reverse intermediate gear 2 17 → Constant mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism 2 21 → Second - shaft gear 26 → Constant mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism 5 30 → Auxiliary transmission driven shaft → Crawling gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0146] 8. Fourth reverse gear (Lo - medium speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism 2 21 → Second shaft gear 26 → Constant mesh gear 9 → Medium - speed driving gear 12 → Medium - speed driven gear 31 → Selecting mechanism 5 30 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0147] 9. First reverse gear (Lo - low speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → First - gear driving gear 8 → First - gear driven gear 25 → Selecting mechanism 3 24 → Second shaft gear 26 → Constant mesh gear 9 → Low - speed driving gear 11 → Low - speed driven gear 29 → Selecting mechanism 5 30 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0148] 10. Second reverse gear (Lo - low speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism 3 24 → Second shaft gear 26 → Constant mesh gear 9 → Low - speed driving gear 11 → Low - speed driven gear 29 → Selecting mechanism 5 30 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0149] 11. Third reverse gear (Lo - low speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism 2 21 → Second shaft gear 26 → Constant mesh gear 9 → Low - speed driving gear 11 → Low - speed driven gear 29 → Selecting mechanism 5 30 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0150] 12. Fourth reverse gear (Lo - low speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism 2 21 → Second shaft gear 26 → Constant mesh gear 9 → Low - gear driving gear 11 → Low - gear driven gear 29 → Selecting mechanism 5 30 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0151] 13. First reverse gear (Lo - slow speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → First - gear driving gear 8 → First - gear driven gear 25 → Selecting mechanism 3 24 → Second shaft gear 26 → Constant mesh gear 9 → Slow - gear driving gear 10 → Slow - gear driven gear 28 → Selecting mechanism 4 27 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0152] 14. Second reverse gear (Lo - slow speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism 3 24 → Second shaft gear 26 → Constant mesh gear 9 → Slow - gear driving gear 10 → Slow - gear driven gear 28 → Selecting mechanism 4 27 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0153] 15. Third reverse gear (Lo - slow speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism 2 21 → Second shaft gear 26 → Constant mesh gear 9 → Slow - gear driving gear 10 → Slow - gear driven gear 28 → Selecting mechanism 4 27 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0154] 16. Fourth gear reverse (Lo - slow speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → Reverse intermediate gear 1 15 → Reverse intermediate gear 2 17 → Constant mesh gear shaft 2 16 → Lo clutch B → Lo driving gear 18 → Lo driven gear 3 → Fourth gear driving gear 5 → Fourth gear driven gear 20 → Selecting mechanism 2 21 → Second shaft gear 26 → Constant mesh gear 9 → Slow gear driving gear 10 → Slow gear driven gear 28 → Selecting mechanism 4 27 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0155] 17. First gear reverse (Hi - high speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → Reverse intermediate gear 1 15 → Reverse intermediate gear 2 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → First gear driving gear 8 → First gear driven gear 25 → Selecting mechanism 3 24 → Second shaft → Selecting mechanism 4 27 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0156] 18. Second gear reverse (Hi - high speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → Reverse intermediate gear 1 15 → Reverse intermediate gear 2 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Second gear driving gear 7 → Second gear driven gear 23 → Selecting mechanism 3 24 → Second shaft → Selecting mechanism 4 27 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0157] 19. Third gear reverse (Hi - high speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → Reverse intermediate gear 1 15 → Reverse intermediate gear 2 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Third gear driving gear 6 → Third gear driven gear 22 → Selecting mechanism 2 21 → Second shaft → Selecting mechanism 4 27 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0158] 20. Fourth gear reverse (Hi - high speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → Reverse intermediate gear 1 15 → Reverse intermediate gear 2 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Fourth gear driving gear 5 → Fourth gear driven gear 20 → Selecting mechanism 2 21 → Second shaft → Selecting mechanism 4 27 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0159] 21. First reverse gear (Hi - medium speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → First gear driving gear 8 → First gear driven gear 25 → Selecting mechanism 3 24 → Second shaft gear 26 → Constant mesh gear 9 → Medium speed driving gear 12 → Medium speed driven gear 31 → Selecting mechanism 5 30 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0160] 22. Second reverse gear (Hi - medium speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Second gear driving gear 7 → Second gear driven gear 23 → Selecting mechanism 3 24 → Second shaft gear 26 → Constant mesh gear 9 → Medium speed driving gear 12 → Medium speed driven gear 31 → Selecting mechanism 5 30 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0161] 23. Third reverse gear (Hi - medium speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Third gear driving gear 6 → Third gear driven gear 22 → Selecting mechanism 2 21 → Second shaft gear 26 → Constant mesh gear 9 → Medium speed driving gear 12 → Medium speed driven gear 31 → Selecting mechanism 5 30 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0162] 24. Fourth reverse gear (Hi - medium speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Fourth gear driving gear 5 → Fourth gear driven gear 20 → Selecting mechanism 2 21 → Second shaft gear 26 → Constant mesh gear 9 → Medium speed driving gear 12 → Medium speed driven gear 31 → Selecting mechanism 5 30 → Auxiliary transmission driven shaft → Crawler gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0163] 25. First reverse gear (Hi - low speed): Input shaft 01 → Selecting mechanism one 1A → Reverse driving gear 1 → Reverse intermediate gear one 15 → Reverse intermediate gear two 17 → Constant - mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → First - gear driving gear 8 → First - gear driven gear 25 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant - mesh gear 9 → Low - gear driving gear 11 → Low - gear driven gear 29 → Selecting mechanism five 30 → Auxiliary - transmission driven shaft → Crawling - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0164] 26. Second reverse gear (Hi - low speed): Input shaft 01 → Selecting mechanism one 1A → Reverse driving gear 1 → Reverse intermediate gear one 15 → Reverse intermediate gear two 17 → Constant - mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism three 24 → Second - shaft gear 26 → Constant - mesh gear 9 → Low - gear driving gear 11 → Low - gear driven gear 29 → Selecting mechanism five 30 → Auxiliary - transmission driven shaft → Crawling - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0165] 27. Third reverse gear (Hi - low speed): Input shaft 01 → Selecting mechanism one 1A → Reverse driving gear 1 → Reverse intermediate gear one 15 → Reverse intermediate gear two 17 → Constant - mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism two 21 → Second - shaft gear 26 → Constant - mesh gear 9 → Low - gear driving gear 11 → Low - gear driven gear 29 → Selecting mechanism five 30 → Auxiliary - transmission driven shaft → Crawling - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0166] 28. Fourth reverse gear (Hi - low speed): Input shaft 01 → Selecting mechanism one 1A → Reverse driving gear 1 → Reverse intermediate gear one 15 → Reverse intermediate gear two 17 → Constant - mesh gear shaft two 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism two 21 → Second - shaft gear 26 → Constant - mesh gear 9 → Low - gear driving gear 11 → Low - gear driven gear 29 → Selecting mechanism five 30 → Auxiliary - transmission driven shaft → Crawling - gear engaging sleeve 33 → Small bevel - gear shaft → Differential → Final - drive assembly F.

[0167] 29. First reverse gear (Hi - slow speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → First - gear driving gear 8 → First - gear driven gear 25 → Selecting mechanism 3 24 → Second - shaft gear 26 → Constant mesh gear 9 → Slow - gear driving gear 10 → Slow - gear driven gear 28 → Selecting mechanism 4 27 → Auxiliary transmission driven shaft → Crawling gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0168] 30. Second reverse gear (Hi - slow speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Second - gear driving gear 7 → Second - gear driven gear 23 → Selecting mechanism 3 24 → Second - shaft gear 26 → Constant mesh gear 9 → Slow - gear driving gear 10 → Slow - gear driven gear 28 → Selecting mechanism 4 27 → Auxiliary transmission driven shaft → Crawling gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0169] 31. Third reverse gear (Hi - slow speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Third - gear driving gear 6 → Third - gear driven gear 22 → Selecting mechanism 2 21 → Second - shaft gear 26 → Constant mesh gear 9 → Slow - gear driving gear 10 → Slow - gear driven gear 28 → Selecting mechanism 4 27 → Auxiliary transmission driven shaft → Crawling gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0170] 32. Fourth reverse gear (Hi - slow speed): Input shaft 01 → Selecting mechanism 1A → Reverse driving gear 1 → First reverse intermediate gear 15 → Second reverse intermediate gear 17 → Constant mesh gear shaft 2 16 → Hi clutch C → Hi driving gear 19 → Hi driven gear 4 → Fourth - gear driving gear 5 → Fourth - gear driven gear 20 → Selecting mechanism 2 21 → Second - shaft gear 26 → Constant mesh gear 9 → Slow - gear driving gear 10 → Slow - gear driven gear 28 → Selecting mechanism 4 27 → Auxiliary transmission driven shaft → Crawling gear engaging sleeve 33 → Small bevel gear shaft → Differential → Final drive assembly F.

[0171] In another embodiment of the present invention, as Figure 1 shown, a tractor includes: a fuselage and the tractor transmission system described in any of the above embodiments.

[0172] It should be noted that the above embodiments can be freely combined as needed. The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A tractor transmission system, characterized in that, Comprising: A reversing assembly, a main speed change assembly, a sub-speed change assembly, and a creep gear assembly arranged in sequence; The reversing assembly includes an input shaft (01) and a reverse intermediate shaft arranged in parallel; the input shaft (01) is sleeved with a reverse drive gear (1) and a forward drive gear (2), and the input shaft (01) is fixedly provided with a selection mechanism one (1A) that can selectively connect with the reverse drive gear (1) or the forward drive gear (2); the reverse intermediate shaft is fixedly provided with a reverse intermediate gear one (15) and a reverse intermediate gear two (17); the reverse intermediate gear one (15) is meshed and connected with the reverse drive gear (1); The main speed change assembly includes a Lo clutch (B), a Hi clutch (C), and a plurality of main speed change transmission paths, and any one of the main speed change transmission paths can be respectively transmission-connected with the Lo clutch (B) or the Hi clutch (C); the Lo clutch (B) is selectively transmission-connected with the forward drive gear (2) or the reverse intermediate gear two (17); the Hi clutch (C) is selectively transmission-connected with the forward drive gear (2) or the reverse intermediate gear two (17); The sub-speed change assembly is provided with a plurality of sub-speed change transmission paths; Any one of the main speed change transmission paths is selectively transmission-connected with any one of the sub-speed change transmission paths; after any one of the main speed change transmission paths is transmission-connected with any one of the sub-speed change transmission paths, it can be selectively transmission-connected with the creep gear assembly; The sub-speed change assembly includes a constant mesh gear shaft one and a sub-speed change driven shaft; The constant mesh gear shaft one is sleeved with a constant mesh gear (9), a slow gear drive gear (10), a low gear drive gear (11), and a medium gear drive gear (12); The main speed change assembly includes a second shaft, and the second shaft is fixedly provided with a second shaft gear (26); The sub-speed change driven shaft is sleeved with a slow gear driven gear (28), a low gear driven gear (29), and a medium gear driven gear (31); the third shaft is fixedly provided with a selection mechanism four (27) that can selectively connect with the second shaft gear (26) or the slow gear driven gear (28), and a selection mechanism five (30) that can selectively connect with the low gear driven gear (29) or the medium gear driven gear (31); The constant mesh gear (9) is meshed and connected with the second shaft gear (26) to form a sub-speed change transmission path; The slow gear drive gear (10) is meshed and connected with the slow gear driven gear (28) to form a sub-speed change transmission path; The low gear drive gear (11) is meshed and connected with the low gear driven gear (29) to form a sub-speed change transmission path; The medium gear drive gear (12) is meshed and connected with the medium gear driven gear (31) to form a sub-speed change transmission path.

2. The tractor speed change system according to claim 1, characterized in that: The main speed change assembly includes a high and low gear spline shaft, a constant mesh gear shaft two (16), and a first shaft arranged in parallel; the high and low gear spline shaft is transmission-connected with the first shaft; The high and low gear spline shaft is sleeved with a Lo driven gear (3) and a Hi driven gear (4); The constant-mesh gear shaft II (16) is provided with the Lo clutch (B) and the Hi clutch (C); the Lo drive gear (18) is sleeved on the constant-mesh gear shaft II (16) corresponding to the Lo clutch (B), and the Lo drive gear (18) is meshed and connected with the Lo driven gear (3); the Hi drive gear (19) is sleeved on the constant-mesh gear shaft II (16) corresponding to the Hi clutch (C), and the Hi drive gear (19) is meshed and connected with the Hi driven gear (4); The first shaft is fixedly provided with N drive gears, where the nth drive gear is the nth gear drive gear; the second shaft is sleeved with N driven gears; where the nth driven gear is the nth gear driven gear; the second shaft is fixedly provided with a selection mechanism that can selectively connect with the nth gear driven gear or the (n - 1)th gear driven gear, and each of the driven gears is provided with such a selection mechanism; the nth gear drive gear and the nth gear driven gear are meshed and connected one by one to form N main speed change transmission paths; where N and n are positive integers greater than 1, and n ≤ N.

3. The tractor transmission system according to claim 2, characterized in that: The first shaft is sleeved with a fourth gear drive gear (5), a third gear drive gear (6), a second gear drive gear (7), and a first gear drive gear (8); The second shaft is sleeved with a fourth gear driven gear (20), a third gear driven gear (22), a second gear driven gear (23), and a first gear driven gear (25); the second shaft is fixedly provided with a second selection mechanism (21) that can selectively connect with the fourth gear driven gear (20) or the third gear driven gear (22), and a third selection mechanism (24) that can selectively connect with the second gear driven gear (23) or the first gear driven gear (25); The fourth gear drive gear (5) and the fourth gear driven gear (20) are meshed and connected to form a main speed change transmission path; The third gear drive gear (6) and the third gear driven gear (22) are meshed and connected to form a main speed change transmission path; The second gear drive gear (7) and the second gear driven gear (23) are meshed and connected to form a main speed change transmission path; The first gear drive gear (8) and the first gear driven gear (25) are meshed and connected to form a main speed change transmission path.

4. The tractor transmission system according to claim 2, characterized in that: The selection mechanism adopts a synchronizer or a sliding mesh sleeve.

5. The tractor transmission system according to claim 2, characterized in that: The constant-mesh gear shaft II (16) is fixedly provided with an intermediate gear, and the intermediate gear is meshed and connected with the forward gear drive gear (2) and the reverse intermediate gear II (17) respectively.

6. The tractor transmission system according to any one of claims 2 - 5, characterized in that: The creeper gear assembly includes a creeper gear shaft and a small bevel gear shaft; The creeper gear shaft is sleeved with a first creeper gear driven gear (13) and a second creeper gear driven gear (14); The auxiliary transmission driven shaft is fixedly provided with an auxiliary transmission driven gear (32), and the auxiliary transmission driven gear (32) is meshed and connected with the first crawler gear driven gear (13); The small bevel gear shaft is fixedly provided with a crawler gear engaging sleeve (33); a crawler gear driven gear (34) is sleeved on the small bevel gear shaft, and the crawler gear driven gear (34) is meshed and connected with the second crawler gear driven gear (14); the crawler gear engaging sleeve (33) is selectively connected with the auxiliary transmission driven gear (32) or the crawler gear driven gear (34).

7. The tractor transmission system according to claim 6, wherein: The small bevel gear shaft is in transmission connection with a differential; the differential is in transmission connection with a final drive assembly.

8. The tractor transmission system according to claim 6, wherein: The small bevel gear shaft is in transmission connection with a transfer case assembly.

9. A tractor, characterized in that, Comprising: A fuselage and the tractor transmission system according to any one of claims 1-8 above.

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