A tractor transmission system with waist bending and waist twisting functions

Abstract

A tractor transmission system with waist bending and waist twisting functions includes a front axle transmission device, a shuttle reversing transmission device, a waist bending and twisting mechanism hinge device, a main speed shift transmission device, a section shift transmission device, a rear axle transmission device and a power output transmission device. A shaft is installed in the front axle transmission device for taking power from an engine. The waist bending and twisting mechanism hinge device is connected to the shuttle reversing transmission device through two shafts and seven shafts. The shuttle reversing transmission device is connected to the main speed shift transmission device through three shafts and eight shafts. The main speed shift transmission device is connected to the section shift transmission device through four shafts, six shafts and eight shafts. The section shift transmission device is connected to the rear axle transmission device through two shafts. The rear axle transmission device is connected to the power output transmission device through two shafts. The tractor transmission system of the present invention has multiple gear speed matching, and has a compact, firm and reliable structure, high transmission efficiency, and convenient gear shifting, and can meet the needs of different working conditions.

Description

Technical Field

[0001] The invention belongs to the technical field of tractors, and in particular relates to a tractor transmission system with waist bending and waist twisting functions. Background Art

[0002] Hilly and mountainous areas are important production bases for fruits, vegetables, grains and oils in my country. Their arable land has the characteristics of large ground undulations, steep slopes and many bends, and narrow mechanized farming roads. The complexity and diversity of hilly and mountainous areas make mechanized operations difficult, the operation quality is poor, and the machinery is easy to tip over. At present, the most widely used power machinery in hilly and mountainous areas in my country is hand tractors, micro-tillage machines and small four-wheel low-clearance tractors. The above-mentioned machinery has poor adaptability to complex hilly and mountainous areas, and the operation quality is also difficult to meet the use requirements.

[0003] There are already improvements on the transmission system used in tractors with multiple gears and high efficiency. For example, the patent with authorization announcement number CN211054920U discloses a tractor transmission system structure, which connects the front axle and the rear axle through a steering articulation mechanism, and the front end of the front axle is connected to the engine, and the engine power is transmitted to the tractor transmission system through the shaft. The steering articulation mechanism can deflect to the left or right along the vertical axis to make the tractor travel left or right. The front axle and the rear axle can also swing along the horizontal axis to achieve a 16F+4R tractor transmission system. Application publication number CN106740078A discloses a tractor transmission mechanism, whose gearbox has 12 forward gears and 12 reverse gears. However, with the country's promotion of full mechanization of hills and mountains, and the promotion of "machine-friendly" transformation of hills and mountains, the demand for agricultural mechanization in hilly and mountainous areas will be accelerated. The existing tractor transmission system still cannot meet the complex hilly and mountainous working conditions, and the transmission structure is complex and the structure is not compact. Summary of the invention

[0004] The purpose of the present invention is to provide a tractor transmission system with bending and twisting functions, which not only has 16 forward gears and 16 reverse gears, multiple gear speed matching, and can meet the needs of different working conditions, but also has a compact, firm and reliable structure, high transmission efficiency, convenient gear shifting, and reasonable speed distribution.

[0005] The technical solution adopted by the present invention to achieve the above-mentioned purpose is:

[0006] A tractor transmission system with waist bending and waist twisting functions comprises a front axle transmission device, a shuttle reversing transmission device, a waist bending and waist twisting mechanism hinge device hingedly arranged between the front axle transmission device and the shuttle reversing transmission device, a main speed shift transmission device, a section shift transmission device, a rear axle transmission device and a power output transmission device.

[0007] A shaft for connecting with the engine is installed in the front axle transmission;

[0008] Seven axes are installed in the hinge device of the waist bending and twisting mechanism;

[0009] The shuttle reversing transmission has two, five and ten axes installed in it;

[0010] There are three, six and eight shafts installed in the main speed change transmission;

[0011] There are four shafts installed in the section shift transmission;

[0012] Nine shafts are installed in the power take-off transmission;

[0013] The hinge device of the waist bending and twisting mechanism is connected to the shuttle type reversing transmission device through the second axis and the seventh axis;

[0014] The shuttle reversing transmission is connected to the main speed change gear transmission through three shafts and eight shafts;

[0015] The main speed shift transmission is connected to the section shift transmission through the fourth, sixth and eighth shafts;

[0016] The section-shift transmission is connected to the rear axle transmission via a second shaft;

[0017] The rear axle transmission is connected to the power output transmission through two shafts.

[0018] As a preferred solution of the present invention, a first large gear and a first small gear installed on the seventh shaft and meshing with the first large gear are provided in the front axle transmission device.

[0019] As a preferred solution of the present invention, the shuttle reversing transmission device is provided with a FR reversing synchronizer, a forward gear driving gear, a reverse gear driving gear, a reverse gear idler gear, a reverse gear driven gear and a forward gear driven gear, wherein:

[0020] The forward gear driving gear is installed on the third shaft and connected to the FR reversing synchronizer;

[0021] The reverse gear driving gear is installed coaxially with the second shaft and connected to the FR reversing synchronizer;

[0022] The forward gear driven gear is fixed to the fifth shaft and meshes with the forward gear driving gear;

[0023] The reverse driven gear is fixed on the fifth shaft;

[0024] The reverse idler gear is fixedly connected to the ten-axle, and the reverse idler gear is meshed with the reverse driving gear and the reverse driven gear at the same time.

[0025] As a preferred solution of the present invention, the main speed shift transmission device is provided with a Ⅰ gear driving gear, a Ⅱ gear driving gear, a Ⅲ gear driving gear, a Ⅳ gear driving gear, a Ⅰ gear driven gear, a Ⅱ gear driven gear, a Ⅲ gear driven gear, a Ⅳ gear driven gear, a Ⅰ-Ⅱ shift synchronizer and a Ⅲ-Ⅳ shift synchronizer, wherein:

[0026] The Ⅰ gear driving gear and the Ⅱ gear driving gear are fixedly connected to the three shafts respectively;

[0027] The III gear driving gear is coaxially mounted on the third shaft and connected to the III-IV gear shift synchronizer;

[0028] The IV gear driving gear is fixed on the fourth shaft and connected to the III-IV gear shift synchronizer;

[0029] The Ⅰ-speed driven gear and the Ⅱ-speed driven gear are respectively sleeved on the six-axis with the same axial centerline hole, and the Ⅰ-speed driven gear and the Ⅱ-speed driven gear are respectively connected with the Ⅰ-Ⅱ shift synchronizer;

[0030] The driven gear of gear III and gear IV are fixedly connected to the sixth shaft S6 respectively;

[0031] The Ⅰ gear driving gear meshes with the Ⅰ gear driven gear, the Ⅱ gear driving gear meshes with the Ⅱ gear driven gear, the Ⅲ gear driving gear meshes with the Ⅲ gear driven gear, and the Ⅳ gear driving gear meshes with the Ⅳ gear driven gear.

[0032] As a preferred solution of the present invention, the section shift transmission device is provided with an L gear driving gear, an L gear driven gear, an M gear driving gear, an M gear driven gear, an HL gear shift engagement sleeve and an M-LL gear shift engagement sleeve, wherein:

[0033] The L gear driving gear and the M gear driving gear are respectively fixed on the fourth shaft S4;

[0034] The L-gear driven gear and the M-gear driven gear are respectively installed coaxially with the eight-axis S8;

[0035] The HL gear shift engagement sleeve is connected to the sixth shaft, the L gear driven gear is connected to the HL gear shift engagement sleeve, and the M gear driven gear is connected to the M-LL gear shift engagement sleeve.

[0036] As a preferred solution of the present invention, a second small bevel gear is provided on the eight-axis in the rear axle transmission device, and a second large bevel gear is meshed with the second small bevel gear to transmit power to the differential assembly.

[0037] As a preferred solution of the present invention, the power output transmission device is provided with a 720rpm driving gear, a 720rpm driven gear, a 540rpm driving gear, a 540rpm driven gear, and a 540-720rpm shift engagement sleeve, wherein:

[0038] The 720rpm driving gear and the 540rpm driving gear are fixed on the second shaft;

[0039] The 720rpm driven gear and the 540rpm driven gear are installed coaxially with the nine-axis and are connected to the 540-720rpm shift engagement sleeves respectively;

[0040] The 720rpm driving gear and the 720rpm driven gear are meshed and connected, the 540rpm driving gear and the 540rpm driven gear are meshed and connected, and the nine-axis is connected to the power output shaft head.

[0041] As a preferred solution of the present invention, a crawler gear transmission device is further provided in the section shift transmission device, and the crawler gear transmission device is equipped with an LL gear driving gear, an LL gear intermediate large gear, an LL gear intermediate small gear, an LL gear driven gear and eleven shafts, wherein:

[0042] The LL gear driving gear and the L gear driven gear are fixed double gears and are installed coaxially with the eight-axis S8;

[0043] The eleventh axis is parallel to the axis center lines of the second and eighth axes, and is arranged in a three-axis space;

[0044] The LL gear and the LL gear are fixedly connected to the eleventh shaft;

[0045] The LL gear driven gear is installed coaxially with the 8th shaft, the hole sleeve is on the 8th shaft, and is connected with the M-LL gear shift engagement sleeve;

[0046] The LL gear driving gear is meshed with the LL gear middle large gear, and the LL gear middle small gear is meshed with the LL gear driven gear.

[0047] As a preferred solution of the present invention, one axis, two axes, three axes, and four axes are arranged with coaxial centerlines;

[0048] The five-axis, six-axis, seven-axis and eight-axis are arranged with the same centerline, and are parallel to the centerlines of the one-axis, two-axis, three-axis and four-axis;

[0049] Axle nine is parallel to the axis center lines of axis one, axis two, axis three and axis four, and is not on the same axis center line as axis five, axis six, axis seven and axis eight; from the rear axle of the tractor to the engine, axis ten and axis eleven are located on both sides of the left and right symmetry plane of the tractor.

[0050] As a preferred solution of the present invention, from the rear axle of the tractor to the engine, the tenth axis is located on the left side of the left-right symmetry plane of the tractor, and the eleventh axis is located on the right side of the left-right symmetry plane of the tractor.

[0051] Beneficial effects of the present invention:

[0052] 1. The transmission system of the present invention adopts a planar two-axis arrangement. The standard configuration adopts a (1+1)×4×4 transmission route, which can achieve 16 forward gears and 16 reverse gears with a shuttle-type reversing function. The optional configuration adopts a (1+1)×4×3 transmission route, which can achieve 12 forward gears and 12 reverse gears. The transmission system has a simple structure and a compact layout, and can obtain a large number of gears and a wide speed coverage.

[0053] 2. The transmission system of the present invention adopts an external meshing gear transmission method by independently arranging a crawler gear transmission device in the section shift transmission device, has a reliable structure, can be selected as an independent module, and can realize the ultra-low vehicle speed operating condition of the crawler gear. It can not only meet the speed requirements of various hilly and mountainous tractor operating conditions at home and abroad, but also, when in the H section gear, the four main speed gears are all a pair of gear meshing transmissions, which greatly improves the operating efficiency of the tractor. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 A schematic diagram of the structure of a tractor transmission system with waist bending and waist twisting functions provided in an embodiment;

[0055] Figure 2 The present invention is a schematic diagram of the distribution structure of each axis of a tractor transmission system with bending and twisting functions provided in an embodiment, viewed from the rear axle of the tractor toward the engine.

[0056] Markings in the figure: 1, front axle transmission device, 2, bending and twisting waist mechanism hinge device, 3, shuttle reversing transmission device, 4, main speed shift transmission device, 5, section shift transmission device, 6, creeper gear transmission device, 7, rear axle transmission device, 8, power output transmission device, 9, forward gear driving gear, 10, Ⅰ gear driving gear, 11, Ⅱ gear driving gear, 12, Ⅲ gear driving gear, 13, Ⅳ gear driving gear, 14, Ⅰ gear driven gear, 15, Ⅱ gear driven gear, 16, Ⅲ gear driven gear, 17, Ⅳ gear driven gear, 18, L gear driving gear, 19, L gear driven gear, 20. LL gear driving gear, 21. LL gear middle large gear, 22. LL gear middle small gear, 23. LL gear driven gear, 24. M gear driving gear, 25. M gear driven gear, 26. First small bevel gear, 27. First large bevel gear, 28. Reverse gear driving gear, 29. Reverse gear idler, 30. Reverse gear driven gear, 31. Forward gear driven gear, 32. 720rpm driving gear, 33. 720rpm driven gear, 34. 540rpm driving gear, 35. 540rpm driven gear, 36. Second small bevel gear, 37. Second large bevel gear. DETAILED DESCRIPTION

[0057] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. In the description of the present invention, it should be noted that, unless otherwise specified, "plurality" means two or more; the orientations or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head" and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0058] The present invention provides a tractor transmission system embodiment with bending and twisting functions, wherein the front axle and the rear axle respectively have differential functions, have stronger adaptability, have more gears, and have high transmission efficiency and low manufacturing cost, and have a 16F+16R tractor gearbox transmission device with shuttle reversing, synchronous shifting, and crawling gears.

[0059] like Figure 1 to Figure 2 As shown, the tractor transmission system with folding and twisting functions of this embodiment includes a front axle transmission device 1, a shuttle-type reversing transmission device 3, a folding and twisting mechanism hinge device 2 hingedly arranged between the front axle transmission device 1 and the shuttle-type reversing transmission device 3, a main speed shifting transmission device 4, a section shifting transmission device 5, a crawling gear transmission device 6, a rear axle transmission device 7 and a power output transmission device 8.

[0060] Among them, a shaft S1 for connecting to the engine is installed in the front axle transmission device 1, a seven-shaft S7 is installed in the bending and twisting mechanism hinge device 2, a two-shaft S2, a five-shaft S5 and a ten-shaft S10 are installed in the shuttle-type reversing transmission device 3, a three-shaft S3, a six-shaft S6 and an eight-shaft S8 are installed in the main speed shift transmission device 4, a four-shaft S4 is installed in the section shift transmission device 5, and a nine-shaft S9 is installed in the power output transmission device 8.

[0061] The input end of the front axle transmission device 1 is connected to the tractor engine, the output end of the front axle transmission device 1 is connected to the bending and twisting mechanism hinge device 2 through a hinge mechanism, the bending and twisting mechanism hinge device 2 is connected to the shuttle reversing transmission device 3 through two shafts S2 and seven shafts S7, the shuttle reversing transmission device 3 is connected to the main speed shift transmission device 4 through three shafts S3 and eight shafts S8, the main speed shift transmission device 4 is connected to the section shift transmission device 5 through four shafts S4, six shafts S6 and eight shafts S8, the section shift transmission device 5 is connected to the rear axle transmission device 7 through two shafts S2 and the first small bevel gear 26, and the rear axle transmission device 7 is connected to the power output transmission device 8 through two shafts S2.

[0062] A shaft S1, a first small bevel gear 26, a first large bevel gear 27, a first differential assembly and a first final drive assembly are installed in the front axle transmission device 1, wherein one end of the shaft S1 is connected to the engine, and the other end is connected to the upper universal joint transmission shaft assembly in the bending and twisting mechanism hinge device 2, the first small bevel gear 26 and the first large bevel gear 27 are meshed with each other, the first small bevel gear 26 is installed on the seven-shaft S7, the left and right first final drive assemblies are respectively connected to the first differential assembly, and the other end of the first final drive assembly is connected to the left and right front wheel tires.

[0063] A seven-axis S7, upper and lower universal joint drive shaft assemblies, a folding hinge mechanism and a twisting hinge mechanism are installed in the folding and twisting mechanism hinge device 2, wherein the upper universal joint drive shaft assembly is connected to the first axis S1 through the twisting hinge mechanism, one end of the seven-axis S7 is connected to the first small bevel gear 26 in the front axle transmission device 1, and the other end is connected to the lower universal joint drive shaft assembly, the twisting hinge mechanism is connected to the folding hinge mechanism through upper and lower pins, the two universal joint drive shaft assemblies are horizontally installed inside the twisting and folding hinge mechanisms, the other end of the upper universal joint drive assembly is connected to the second axis S2, and the other end of the lower universal joint drive assembly is connected to the eighth axis S8.

[0064] The shuttle-type reversing transmission device 3 is equipped with a second shaft S2, a FR reversing synchronizer, a forward gear driving gear 9, a reverse gear driving gear 28, a reverse gear idler 29, a reverse gear driven gear 30, a forward gear driven gear 31, a fifth shaft S5, and a tenth shaft S10. The second shaft S2 passes through the shuttle-type reversing transmission device 3, the forward gear driving gear 9 is fixedly connected to the third shaft S3, and the third shaft S3 is installed coaxially with the second shaft S2 without contact. The other end of the forward gear driving gear 9 is connected to the FR reversing synchronizer, and the reverse gear driving gear 28 is installed coaxially with the second shaft S2. The hole sleeve is on the second shaft S 2, the other end is connected to the FR reversing synchronizer, the fifth axis S5 is coaxially installed with the eighth axis S8, the axis centerline of the fifth axis S5 is in the same vertical plane as the second axis S2, and is parallel, the forward gear driven gear 31 is fixedly connected to the fifth axis S5, and meshes with the forward gear driving gear 9, the reverse gear driven gear 30 is fixedly connected to the fifth axis S5, the reverse gear idler gear 29 is fixedly connected to the tenth axis S10, the tenth axis S10 is respectively parallel to the axis centerlines of the eight-axis S8 and the second axis S2, and is arranged in three axes in space, and the reverse gear idler gear 29 is meshed with the reverse gear driving gear 28 and the reverse gear driven gear 30 at the same time.

[0065] A three-axis S3, a six-axis S6, an eight-axis S8, a first gear driving gear 10, a second gear driving gear 11, a third gear driving gear 12, a fourth gear driving gear 13, a first gear driven gear 14, a second gear driven gear 15, a third gear driven gear 16, a fourth gear driven gear 17, and a first-second gear shift synchronizer and a third-fourth gear shift synchronizer are installed in the main speed change gear shift transmission device 4, wherein the first gear driving gear 10 and the second gear driving gear 11 are respectively fixedly connected to the three-axis S3, the third gear driving gear 12 is coaxially installed on the three-axis S3 and is connected to the third-fourth gear shift synchronizer, the fourth gear driving gear 13 is fixedly connected to the fourth axis S4, and It is connected to the III-IV shift synchronizer, the sixth shaft S6 is newly installed coaxially with the eighth shaft S8, the I gear driven gear 14 and the II gear driven gear 15 are respectively sleeved on the sixth shaft S6 with the coaxial centerline holes, the I gear driven gear 14 and the II gear driven gear 15 are respectively connected to the I-II shift synchronizer, the III gear driven gear 16 and the IV gear driven gear 17 are respectively fixed on the sixth shaft S6, the I gear driving gear 10 is meshed with the I gear driven gear 14, the II gear driving gear 11 is meshed with the II gear driven gear 15, the III gear driving gear 12 is meshed with the III gear driven gear 16, and the IV gear driving gear 13 is meshed with the IV gear driven gear 17.

[0066] The four-shaft S4, the L-shaft driving gear 18, the L-shaft driven gear 19, the crawler gear transmission 6, the M-shaft driving gear 24, the M-shaft driven gear 25, the HL-shaft shift engagement sleeve, and the M-LL-shaft shift engagement sleeve are installed in the section shift transmission device 5. The four-shaft S4 is installed coaxially with the second-shaft S2, and the hole of the four-shaft S4 is sleeved on the second-shaft S2. The L-shaft driving gear 18 and the M-shaft driving gear 24 are respectively fixed on the four-shaft S4. The L-shaft driven gear 19 and the M-shaft driven gear 25 are respectively installed coaxially with the eighth-shaft S8, and the hole is sleeved on the eighth-shaft S8. The HL-shaft shift engagement sleeve is connected to the sixth-shaft S6. The L-shaft driven gear 19 is connected to the HL-shaft shift engagement sleeve, and the M-shaft driven gear 25 is connected to the M-LL-shaft shift engagement sleeve.

[0067] In this embodiment, the crawler gear transmission device 6 is installed inside the section shift transmission device 5 as an independent module unit. The LL gear driving gear 20, the LL gear intermediate large gear 21, the LL gear intermediate small gear 22, the LL gear driven gear 23 and the eleventh shaft S11 are installed in the crawler gear transmission device 6, wherein the LL gear driving gear 20 and the L gear driven gear 19 are fixed double gears and are installed coaxially with the eight-shaft S8. The LL gear intermediate large gear 21 and the LL gear intermediate small gear 22 are fixed on the eleven-shaft S11. The eleven-shaft S11 is parallel to the axis of the second shaft S2 and the eight-shaft S8, and is installed in a three-axis spatial arrangement. The LL gear driven gear 23 is installed coaxially with the eight-shaft S8, the hole sleeve is on the eight-shaft S8, and is connected to the M-LL gear shift engagement sleeve. The LL gear driving gear 20 and the LL gear intermediate large gear 21 are meshed and connected, and the LL gear intermediate small gear 22 and the LL gear driven gear 23 are meshed and connected.

[0068] The second shaft S2, the second small bevel gear 36, the second large bevel gear 37, the second differential assembly and the second final transmission assembly are installed in the rear axle transmission device 7, wherein one end of the second shaft S2 is connected to the power output transmission device 8, the second small bevel gear 36 and the second large bevel gear 37 are meshed with each other, the second small bevel gear 36 is installed on the eight-shaft S8, the left and right second final transmission assemblies are respectively connected to the second differential assembly, and the other end of the second final transmission assembly is connected to the left and right rear wheel tires.

[0069] Two shafts S2, 720rpm driving gear 32, 720rpm driven gear 33, 540rpm driving gear 34, 540rpm driven gear 35, nine shafts S9, 540-720rpm shift engagement sleeve are installed in the power output transmission device 8, wherein the 720rpm driving gear 32 and the 540rpm driving gear 34 are fixedly connected to the two shafts S2, the 720rpm driven gear 33 and the 540rpm driven gear 35 are installed coaxially with the nine shafts S9, the holes are sleeved on the nine shafts S9, and are respectively connected to the 540-720rpm shift engagement sleeve, the 720rpm driving gear 32 and the 720rpm driven gear 33 are meshed and connected, the 540rpm driving gear 34 and the 540rpm driven gear 35 are meshed and connected, the nine shafts S9 are parallel to the axes of the two shafts S2 and arranged in a vertical plane, and the nine shafts S9 are connected to the power output shaft head.

[0070] In this embodiment, the following conditions are satisfied between the axes: the first axis S1, the second axis S2, the third axis S3, and the fourth axis S4 are coaxial, the fifth axis S5, the sixth axis S6, the seventh axis S7, and the eighth axis S8 are coaxial, and are parallel to the axis center lines of the first axis S1, the second axis S2, the third axis S3, and the fourth axis S4, and are on the vertical plane of the tractor center; the ninth axis S9 is parallel to the axis center lines of the first axis S1, the second axis S2, the third axis S3, and the fourth axis S4, and are on the vertical plane of the tractor center, but is not on the same axis center line as the fifth axis S5, the sixth axis S6, the seventh axis S7, and the eighth axis S8. As a whole, viewed from the rear axle of the tractor to the engine, the tenth axis S10 and the eleventh axis S11 are located on both sides of the left-right symmetry plane of the tractor, wherein the tenth axis S10 is located on the left side of the left-right symmetry plane of the tractor, and the eleventh axis S11 is located on the right side of the left-right symmetry plane of the tractor.

[0071] The front axle and the rear axle have differential functions respectively, with stronger adaptability, more gears, high transmission efficiency, low manufacturing cost, and a 16F+16R tractor gearbox transmission with shuttle reversing, synchronized shifting, and crawling gears.

[0072] In the transmission system of the present embodiment, the front axle transmission device 1 and the rear axle transmission device 7 can both use the same components such as the differential assembly, the final drive assembly, etc. The gearbox uses tires of the same diameter for the front and rear wheels to increase the ground contact area and improve the traction of the tractor. At the same time, the front and rear axles are directly connected through the upper and lower universal joint drive shaft assemblies, which can effectively avoid the problem of tire wear caused by the tire lead rate; the gearbox is equipped with a folding and twisting mechanism hinge device 2, which can achieve a smaller turning radius and is more suitable for complex working conditions in hilly and mountainous areas.

[0073] The transmission system of this embodiment can achieve 16 forward gears and 16 reverse gears, and the forward and reverse gears have a wide speed coverage. Removing the creeper gear transmission device 6 module can achieve 12 forward gears and 12 reverse gears. The transmission device can meet the speed requirements of various hilly and mountainous tractor operating conditions at home and abroad. At the same time, when the gearbox is in the H section gear position, the four main speed gears are all a pair of gear meshing transmissions, which greatly improves the operating efficiency of the tractor.

[0074] The main shaft system layout of the main and auxiliary gearboxes is a two-axis layout. The spatial layout structure is very compact, simple and convenient, which effectively saves space and reduces the size of the gearbox.

[0075] When power transmission is performed, in the main speed shift transmission device 4, a Ⅰ gear driving gear 10, a Ⅱ gear driving gear 11, a Ⅲ gear driving gear 12, a Ⅳ gear driving gear 13, a Ⅰ gear driven gear 14, a Ⅱ gear driven gear 15, a Ⅲ gear driven gear 16, a Ⅳ gear driven gear 17, and a Ⅰ-Ⅱ shift synchronizer and a Ⅲ-Ⅳ shift synchronizer are installed to form four main speed gears, namely, Ⅰ gear, Ⅱ gear, Ⅲ gear, and Ⅳ gear, and each shift synchronizer controls two gears.

[0076] The L gear driving gear 18, the L gear driven gear 19, the crawler gear transmission device 6, the M gear driving gear 24, the M gear driven gear 25, the HL gear shift engagement sleeve, and the M-LL gear shift engagement sleeve are installed in the section shift transmission device 5 to form four auxiliary speed gears, namely LL gear, L gear, M gear, and H gear, and each shift engagement sleeve controls two gears.

[0077] The crawler gear transmission device 6 is installed in the section shift transmission device 5 as an independent module, the L gear driving gear 18 is used as the input end of the crawler gear power, the LL gear driving gear 20 and the L gear driven gear 19 are fixed double gears, and the power is transmitted to the eight-axis S8 through the L gear driving gear 18, the L gear driven gear 19, the LL gear intermediate large gear 21, the LL gear intermediate small gear 22, the LL gear driven gear 23, and the M-LL gear shift engagement sleeve in sequence, and then divided into two front and rear branches through the eight-axis S8 to transmit the power through the front and rear tires. The crawler gear transmission device 6 cleverly uses the L gear gear pair as the input end, has a compact layout, a simple structure, and is located inside the box. It can be selected as an independent module. In the optional configuration, the crawler gear transmission device 6 can be omitted to achieve 12 forward gears and 12 reverse gears.

[0078] When using:

[0079] Forward gear 1: FR reversing synchronizer combined with F gear, Ⅰ-Ⅱ shift synchronizer combined with Ⅰ gear, M-LL gear shift engagement sleeve combined with LL gear. The engine power is transmitted from shaft 1 S1 → upper universal joint transmission shaft assembly → shaft 2 S2 → FR reversing synchronizer → forward gear driving gear 9 → shaft 3 S3 → Ⅰ gear driving gear 10 → Ⅰ gear driven gear 14 → Ⅰ-Ⅱ shift synchronizer → shaft 6 S6 → Ⅳ gear driven gear 17 → Ⅳ gear driving gear 13 → shaft 4 S4 → L gear driving gear 18 → L gear driven gear 19 → LL gear intermediate large gear 21 → LL gear intermediate small gear 22 → LL gear driven gear 23 → M-LL gear shift engagement sleeve → shaft 8 S8 → front and rear axle small bevel gears → front and rear axle transmission device.

[0080] Forward 2nd gear: FR reversing synchronizer combined with F gear, Ⅰ-Ⅱ shift synchronizer combined with Ⅱ gear, M-LL gear shift engagement sleeve combined with LL gear. The engine power is transmitted from shaft 1 S1→upper universal joint transmission shaft assembly→shaft 2 S2→FR reversing synchronizer→forward gear driving gear 9→shaft 3 S3→Ⅱ gear driving gear 11→Ⅱ gear driven gear 15→Ⅰ-Ⅱ shift synchronizer→shaft 6 S6→Ⅳ gear driven gear 17→Ⅳ gear driving gear 13→shaft 4 S4→L gear driving gear 18→L gear driven gear 19→LL gear intermediate large gear 21→LL gear intermediate small gear 22→LL gear driven gear 23→M-LL gear shift engagement sleeve→shaft 8 S8→front and rear axle small bevel gears→front and rear axle transmission device.

[0081] Forward 3 gears: FR reversing synchronizer combined with F gear, III-IV shift synchronizer combined with III gear, M-LL gear shift engagement sleeve combined with LL gear. The engine power is transmitted from shaft one S1→upper universal joint transmission shaft assembly→shaft two S2→FR reversing synchronizer→forward gear driving gear 9→shaft three S3→III-IV shift synchronizer→III gear driving gear 12→III gear driven gear 16→shaft six S6→IV gear driven gear 17→IV gear driving gear 13→shaft four S4→L gear driving gear 18→L gear driven gear 19→LL gear intermediate large gear 21→LL gear intermediate small gear 22→LL gear driven gear 23→M-LL gear shift engagement sleeve→shaft eight S8→front and rear axle small bevel gears→front and rear axle transmission device.

[0082] Forward 4 gears: FR reversing synchronizer combined with F gear, III-IV shift synchronizer combined with IV gear, M-LL gear shift engagement sleeve combined with LL gear. The engine power is transmitted from shaft one S1→upper universal joint transmission shaft assembly→shaft two S2→FR reversing synchronizer→forward gear driving gear 9→shaft three S3→III-IV shift synchronizer→IV gear driving gear 13→shaft four S4→L gear driving gear 18→L gear driven gear 19→LL gear intermediate large gear 21→LL gear intermediate small gear 22→LL gear driven gear 23→M-LL gear shift engagement sleeve→shaft eight S8→front and rear axle small bevel gears→front and rear axle transmission device.

[0083] 5 forward gears: FR reversing synchronizer combined with F gear, Ⅰ-Ⅱ shift synchronizer combined with Ⅰ gear, HL gear shift engagement sleeve combined with L gear. The engine power is transmitted from shaft 1 S1 → upper universal joint transmission shaft assembly → shaft 2 S2 → FR reversing synchronizer → forward gear driving gear 9 → shaft 3 S3 → Ⅰ gear driving gear 10 → Ⅰ gear driven gear 14 → Ⅰ-Ⅱ shift synchronizer → shaft 6 S6 → Ⅳ gear driven gear 17 → Ⅳ gear driving gear 13 → shaft 4 S4 → L gear driving gear 18 → L gear driven gear 19 → HL gear shift engagement sleeve → shaft 8 S8 → front and rear axle small bevel gears → front and rear axle transmission device.

[0084] Forward 6 gears: FR reversing synchronizer combined with F gear, Ⅰ-Ⅱ shift synchronizer combined with Ⅱ gear, HL gear shift engagement sleeve combined with L gear. The engine power is transmitted from shaft 1 S1 → upper universal joint transmission shaft assembly → shaft 2 S2 → FR reversing synchronizer → forward gear driving gear 9 → shaft 3 S3 → Ⅱ gear driving gear 11 → Ⅱ gear driven gear 15 → Ⅰ-Ⅱ shift synchronizer → shaft 6 S6 → Ⅳ gear driven gear 17 → Ⅳ gear driving gear 13 → shaft 4 S4 → L gear driving gear 18 → L gear driven gear 19 → HL gear shift engagement sleeve → shaft 8 S8 → front and rear axle small bevel gears → front and rear axle transmission device.

[0085] 7 forward gears: FR reversing synchronizer combined with F gear, III-IV shift synchronizer combined with III gear, HL gear shift engagement sleeve combined with L gear. The engine power is transmitted from shaft one S1→upper universal joint transmission shaft assembly→shaft two S2→FR reversing synchronizer→forward gear driving gear 9→shaft three S3→III-IV shift synchronizer→III gear driving gear 12→III gear driven gear 16→shaft six S6→IV gear driven gear 17→IV gear driving gear 13→shaft four S4→L gear driving gear 18→L gear driven gear 19→HL gear shift engagement sleeve→shaft eight S8→front and rear axle small bevel gears→front and rear axle transmission device.

[0086] 8 forward gears: FR reversing synchronizer combined with F gear, III-IV shift synchronizer combined with IV gear, HL gear shift engagement sleeve combined with L gear. The engine power is transmitted from shaft one S1 → upper universal joint drive shaft assembly → shaft two S2 → FR reversing synchronizer → forward gear driving gear 9 → shaft three S3 → III-IV shift synchronizer → IV gear driving gear 13 → shaft four S4 → L gear driving gear 18 → L gear driven gear 19 → HL gear shift engagement sleeve → shaft eight S8 → front and rear axle small bevel gears → front and rear axle transmission device.

[0087] 9 forward gears: FR reversing synchronizer combined with F gear, Ⅰ-Ⅱ shift synchronizer combined with Ⅰ gear, M-LL gear shift engagement sleeve combined with M gear. The engine power is transmitted from shaft 1 S1 → upper universal joint drive shaft assembly → shaft 2 S2 → FR reversing synchronizer → forward gear driving gear 9 → shaft 3 S3 → Ⅰ gear driving gear 10 → Ⅰ gear driven gear 14 → Ⅰ-Ⅱ shift synchronizer → shaft 6 S6 → Ⅳ gear driven gear 17 → Ⅳ gear driving gear 13 → shaft 4 S4 → M gear driving gear 24 → M gear driven gear 25 → M-LL gear shift engagement sleeve → shaft 8 S8 → front and rear axle small bevel gears → front and rear axle transmission device.

[0088] 10 forward gears: FR reversing synchronizer combined with F gear, Ⅰ-Ⅱ shift synchronizer combined with Ⅱ gear, M-LL gear shift engagement sleeve combined with M gear. The engine power is transmitted from shaft one S1→upper universal joint transmission shaft assembly→shaft two S2→FR reversing synchronizer→forward gear driving gear 9→shaft three S3→Ⅱ gear driving gear 11→Ⅱ gear driven gear 15→Ⅰ-Ⅱ shift synchronizer→shaft six S6→Ⅳ gear driven gear 17→Ⅳ gear driving gear 13→shaft four S4→M gear driving gear 24→M gear driven gear 25→M-LL gear shift engagement sleeve→shaft eight S8→front and rear axle small bevel gears→front and rear axle transmission device.

[0089] 11 forward gears: FR reversing synchronizer combined with F gear, III-IV shift synchronizer combined with III gear, M-LL gear shift engagement sleeve combined with M gear. The engine power is transmitted from shaft one S1→upper universal joint transmission shaft assembly→shaft two S2→FR reversing synchronizer→forward gear driving gear 9→shaft three S3→III-IV shift synchronizer→III gear driving gear 12→III gear driven gear 16→shaft six S6→IV gear driven gear 17→IV gear driving gear 13→shaft four S4→M gear driving gear 24→M gear driven gear 25→M-LL gear shift engagement sleeve→shaft eight S8→front and rear axle small bevel gears→front and rear axle transmission device.

[0090] 12 forward gears: FR reversing synchronizer combined with F gear, III-IV shift synchronizer combined with IV gear, M-LL gear shift engagement sleeve combined with M gear. The engine power is transmitted from shaft one S1 → upper universal joint drive shaft assembly → shaft two S2 → FR reversing synchronizer → forward gear driving gear 9 → shaft three S3 → III-IV shift synchronizer → IV gear driving gear 13 → shaft four S4 → M gear driving gear 24 → M gear driven gear 25 → M-LL gear shift engagement sleeve → shaft eight S8 → front and rear axle small bevel gears → front and rear axle transmission device.

[0091] 13 forward gears: FR reversing synchronizer combined with F gear, Ⅰ-Ⅱ shift synchronizer combined with Ⅰ gear, HL gear shift engagement sleeve combined with H gear. The engine power is transmitted from shaft S1 → upper universal joint drive shaft assembly → shaft S2 → FR reversing synchronizer → forward gear driving gear 9 → shaft S3 → Ⅰ gear driving gear 10 → Ⅰ gear driven gear 14 → Ⅰ-Ⅱ shift synchronizer → shaft S6 → HL gear shift engagement sleeve → shaft S8 → front and rear axle pinion gears → front and rear axle transmission device.

[0092] 14 forward gears: FR reversing synchronizer combined with F gear, Ⅰ-Ⅱ shift synchronizer combined with Ⅱ gear, HL gear shift engagement sleeve combined with H gear. The engine power is transmitted from shaft one S1 → upper universal joint drive shaft assembly → shaft two S2 → FR reversing synchronizer → forward gear driving gear 9 → shaft three S3 → Ⅱ gear driving gear 11 → Ⅱ gear driven gear 15 → Ⅰ-Ⅱ shift synchronizer → shaft six S6 → HL gear shift engagement sleeve → shaft eight S8 → front and rear axle small bevel gears → front and rear axle transmission device.

[0093] 15 forward gears: FR reversing synchronizer combined with F gear, III-IV shift synchronizer combined with III gear, HL gear shift engagement sleeve combined with H gear. The engine power is transmitted from shaft one S1 → upper universal joint drive shaft assembly → shaft two S2 → FR reversing synchronizer → forward gear driving gear 9 → shaft three S3 → III-IV shift synchronizer → III gear driving gear 12 → III gear driven gear 16 → shaft six S6 → HL gear shift engagement sleeve → shaft eight S8 → front and rear axle small bevel gears → front and rear axle transmission device.

[0094] 16 forward gears: FR reversing synchronizer combined with F gear, III-IV shift synchronizer combined with IV gear, HL gear shift engagement sleeve combined with H gear. The engine power is transmitted from shaft one S1 → upper universal joint drive shaft assembly → shaft two S2 → FR reversing synchronizer → forward gear driving gear 9 → shaft three S3 → III-IV shift synchronizer → IV gear driving gear 13 → IV gear driven gear 17 → shaft six S6 → HL gear shift engagement sleeve → shaft eight S8 → front and rear axle pinion gears → front and rear axle transmission device.

[0095] Reverse 1st gear: FR reversing synchronizer combined with R gear, Ⅰ-Ⅱ shift synchronizer combined with Ⅰ gear, M-LL gear shift engagement sleeve combined with LL gear. The engine power is transmitted from shaft 1 S1→upper universal joint transmission shaft assembly→shaft 2 S2→FR reversing synchronizer→reverse gear driving gear 28→reverse gear idler gear 29→reverse gear driven gear 30→shaft 5 S5→forward gear driven gear 31→forward gear driving gear 9→shaft 3 S3→Ⅰ gear driving gear 10→Ⅰ gear driven gear 14→Ⅰ-Ⅱ shift synchronizer→shaft 6 S6→Ⅳ gear driven gear 17→Ⅳ gear driving gear 13→shaft 4 S4→L gear driving gear 18→L gear driven gear 19→LL gear intermediate large gear 21→LL gear intermediate small gear 22→LL gear driven gear 23→M-LL gear shift engagement sleeve→shaft 8 S8→front and rear axle small bevel gears→front and rear axle transmission device.

[0096] Reverse 2 gears: FR reversing synchronizer combined with R gear, Ⅰ-Ⅱ shift synchronizer combined with Ⅱ gear, M-LL gear shift engagement sleeve combined with LL gear. The engine power is transmitted from shaft 1 S1→upper universal joint transmission shaft assembly→shaft 2 S2→FR reversing synchronizer→reverse gear driving gear 28→reverse gear idler gear 29→reverse gear driven gear 30→shaft 5 S5→forward gear driven gear 31→forward gear driving gear 9→shaft 3 S3→Ⅱ gear driving gear 11→Ⅱ gear driven gear 15→Ⅰ-Ⅱ shift synchronizer→shaft 6 S6→Ⅳ gear driven gear 17→Ⅳ gear driving gear 13→shaft 4 S4→L gear driving gear 18→L gear driven gear 19→LL gear intermediate large gear 21→LL gear intermediate small gear 22→LL gear driven gear 23→M-LL gear shift engagement sleeve→shaft 8 S8→front and rear axle small bevel gears→front and rear axle transmission device.

[0097] Reverse 3 gears: FR reversing synchronizer combined with R gear, III-IV shift synchronizer combined with III gear, M-LL gear shift engagement sleeve combined with LL gear. The engine power is transmitted from shaft 1 S1 → upper universal joint transmission shaft assembly → shaft 2 S2 → FR reversing synchronizer → reverse gear driving gear 28 → reverse gear idler gear 29 → reverse gear driven gear 30 → shaft 5 S5 → forward gear driven gear 31 → forward gear driving gear 9 → shaft 3 S3 → III-IV shift synchronizer → III gear driving gear 12 → III gear driven gear 16 → shaft 6 S6 → IV gear driven gear 17 → IV gear driving gear 13 → shaft 4 S4 → L gear driving gear 18 → L gear driven gear 19 → LL gear intermediate large gear 21 → LL gear intermediate small gear 22 → LL gear driven gear 23 → M-LL gear shift engagement sleeve → shaft 8 S8 → front and rear axle small bevel gears → front and rear axle transmission device.

[0098] Reverse 4 gears: FR reversing synchronizer combined with R gear, III-IV shift synchronizer combined with IV gear, M-LL gear shift engagement sleeve combined with LL gear. The engine power is transmitted from shaft one S1→upper universal joint drive shaft assembly→shaft two S2→FR reversing synchronizer→reverse gear driving gear 28→reverse gear idler gear 29→reverse gear driven gear 30→shaft five S5→forward gear driven gear 31→forward gear driving gear 9→shaft three S3→III-IV shift synchronizer→IV gear driving gear 13→shaft four S4→L gear driving gear 18→L gear driven gear 19→LL gear intermediate large gear 21→LL gear intermediate small gear 22→LL gear driven gear 23→M-LL gear shift engagement sleeve→shaft eight S8→front and rear axle small bevel gears→front and rear axle transmission device.

[0099] Reverse 5 gears: FR reversing synchronizer combined with R gear, Ⅰ-Ⅱ shift synchronizer combined with Ⅰ gear, HL gear shift engagement sleeve combined with L gear. The engine power is transmitted from shaft 1 S1 → upper universal joint drive shaft assembly → shaft 2 S2 → FR reversing synchronizer → reverse gear driving gear 28 → reverse gear idler gear 29 → reverse gear driven gear 30 → shaft 5 S5 → forward gear driven gear 31 → forward gear driving gear 9 → shaft 3 S3 → Ⅰ gear driving gear 10 → Ⅰ gear driven gear 14 → Ⅰ-Ⅱ shift synchronizer → shaft 6 S6 → Ⅳ gear driven gear 17 → Ⅳ gear driving gear 13 → shaft 4 S4 → L gear driving gear 18 → L gear driven gear 19 → HL gear shift engagement sleeve → shaft 8 S8 → front and rear axle small bevel gears → front and rear axle transmission device.

[0100] Reverse 6 gears: FR reversing synchronizer combined with R gear, Ⅰ-Ⅱ shift synchronizer combined with Ⅱ gear, HL gear shift engagement sleeve combined with L gear. The engine power is transmitted from shaft 1 S1→upper universal joint drive shaft assembly→shaft 2 S2→FR reversing synchronizer→reverse gear driving gear 28→reverse gear idler gear 29→reverse gear driven gear 30→shaft 5 S5→forward gear driven gear 31→forward gear driving gear 9→shaft 3 S3→Ⅱ gear driving gear 11→Ⅱ gear driven gear 15→Ⅰ-Ⅱ shift synchronizer→shaft 6 S6→Ⅳ gear driven gear 17→Ⅳ gear driving gear 13→shaft 4 S4→L gear driving gear 18→L gear driven gear 19→HL gear shift engagement sleeve→shaft 8 S8→front and rear axle small bevel gears→front and rear axle transmission device.

[0101] Reverse 7 gears: FR reversing synchronizer combined with R gear, III-IV shift synchronizer combined with III gear, HL gear shift engagement sleeve combined with L gear. The engine power is transmitted from the first shaft S1 → upper universal joint drive shaft assembly → second shaft S2 → FR reversing synchronizer → reverse gear driving gear 28 → reverse gear idler gear 29 → reverse gear driven gear 30 → fifth shaft S5 → forward gear driven gear 31 → forward gear driving gear 9 → third shaft S3 → III-IV shift synchronizer → III gear driving gear 12 → III gear driven gear 16 → sixth shaft S6 → IV gear driven gear 17 → IV gear driving gear 13 → fourth shaft S4 → L gear driving gear 18 → L gear driven gear 19 → HL gear shift engagement sleeve → eighth shaft S8 → front and rear axle small bevel gears → front and rear axle transmission device.

[0102] 8 reverse gears: FR reversing synchronizer combined with R gear, III-IV shift synchronizer combined with IV gear, HL gear shift engagement sleeve combined with L gear. The engine power is transmitted from shaft one S1 → upper universal joint drive shaft assembly → shaft two S2 → FR reversing synchronizer → reverse gear driving gear 28 → reverse gear idler gear 29 → reverse gear driven gear 30 → shaft five S5 → forward gear driven gear 31 → forward gear driving gear 9 → shaft three S3 → III-IV shift synchronizer → IV gear driving gear 13 → shaft four S4 → L gear driving gear 18 → L gear driven gear 19 → HL gear shift engagement sleeve → shaft eight S8 → front and rear axle pinion gears 26 → front and rear axle transmission device.

[0103] Reverse 9 gears: FR reversing synchronizer combined with R gear, Ⅰ-Ⅱ shift synchronizer combined with Ⅰ gear, M-LL gear shift engagement sleeve combined with M gear. The engine power is transmitted from shaft 1 S1 → upper universal joint drive shaft assembly → shaft 2 S2 → FR reversing synchronizer → reverse gear driving gear 28 → reverse gear idler gear 29 → reverse gear driven gear 30 → shaft 5 S5 → forward gear driven gear 31 → forward gear driving gear 9 → shaft 3 S3 → Ⅰ gear driving gear 10 → Ⅰ gear driven gear 14 → Ⅰ-Ⅱ shift synchronizer → shaft 6 S6 → Ⅳ gear driven gear 17 → Ⅳ gear driving gear 13 → shaft 4 S4 → M gear driving gear 24 → M gear driven gear 25 → M-LL gear shift engagement sleeve → shaft 8 S8 → front and rear axle pinion gears → front and rear axle transmission device.

[0104] 10 reverse gears: FR reversing synchronizer combined with R gear, Ⅰ-Ⅱ shift synchronizer combined with Ⅱ gear, M-LL gear shift engagement sleeve combined with M gear. The engine power is transmitted from shaft 1 S1 → upper universal joint drive shaft assembly → shaft 2 S2 → FR reversing synchronizer → reverse gear driving gear 28 → reverse gear idler gear 29 → reverse gear driven gear 30 → shaft 5 S5 → forward gear driven gear 31 → forward gear driving gear 9 → shaft 3 S3 → Ⅱ gear driving gear 11 → Ⅱ gear driven gear 15 → Ⅰ-Ⅱ shift synchronizer → shaft 6 S6 → Ⅳ gear driven gear 17 → Ⅳ gear driving gear 13 → shaft 4 S4 → M gear driving gear 24 → M gear driven gear 25 → M-LL gear shift engagement sleeve → shaft 8 S8 → front and rear axle small bevel gears → front and rear axle transmission device.

[0105] 11 reverse gears: FR reversing synchronizer combined with R gear, III-IV shift synchronizer combined with III gear, M-LL gear shift engagement sleeve combined with M gear. The engine power is transmitted from the first shaft S1→upper universal joint drive shaft assembly→the second shaft S2→FR reversing synchronizer→reverse gear driving gear 28→reverse gear idler gear 29→reverse gear driven gear 30→the fifth shaft S5→forward gear driven gear 31→forward gear driving gear 9→the third shaft S3→III-IV shift synchronizer→III gear driving gear 12→III gear driven gear 16→the sixth shaft S6→IV gear driven gear 17→IV gear driving gear 13→the fourth shaft S4→M gear driving gear 24→M gear driven gear 25→M-LL gear shift engagement sleeve→the eighth shaft S8→front and rear axle small bevel gears→front and rear axle transmission device.

[0106] 12 reverse gears: FR reversing synchronizer combined with R gear, III-IV shift synchronizer combined with IV gear, M-LL gear shift engagement sleeve combined with M gear. The engine power is transmitted from the first shaft S1 → upper universal joint drive shaft assembly → second shaft S2 → FR reversing synchronizer → reverse gear driving gear 28 → reverse gear idler gear 29 → reverse gear driven gear 30 → fifth shaft S5 → forward gear driven gear 31 → forward gear driving gear 9 → third shaft S3 → III-IV shift synchronizer → IV gear driving gear 13 → fourth shaft S4 → M gear driving gear 24 → M gear driven gear 25 → M-LL gear shift engagement sleeve → eighth shaft S8 → front and rear axle small bevel gears → front and rear axle transmission device.

[0107] 13 reverse gears: FR reversing synchronizer combined with R gear, Ⅰ-Ⅱ shift synchronizer combined with Ⅰ gear, HL gear shift engagement sleeve combined with H gear. The engine power is transmitted from shaft one S1 → upper universal joint drive shaft assembly → shaft two S2 → FR reversing synchronizer → reverse gear driving gear 28 → reverse gear idler gear 29 → reverse gear driven gear 30 → shaft five S5 → forward gear driven gear 31 → forward gear driving gear 9 → shaft three S3 → Ⅰ gear driving gear 10 → Ⅰ gear driven gear 14 → Ⅰ-Ⅱ shift synchronizer → shaft six S6 → HL gear shift engagement sleeve → shaft eight S8 → front and rear axle small bevel gears → front and rear axle transmission device.

[0108] 14 reverse gears: FR reversing synchronizer combined with R gear, Ⅰ-Ⅱ shift synchronizer combined with Ⅱ gear, HL gear shift engagement sleeve combined with H gear. The engine power is transmitted from shaft one S1 → upper universal joint drive shaft assembly → shaft two S2 → FR reversing synchronizer → reverse gear driving gear 28 → reverse gear idler gear 29 → reverse gear driven gear 30 → shaft five S5 → forward gear driven gear 31 → forward gear driving gear 9 → shaft three S3 → Ⅱ gear driving gear 11 → Ⅱ gear driven gear 15 → Ⅰ-Ⅱ shift synchronizer → shaft six S6 → HL gear shift engagement sleeve → shaft eight S8 → front and rear axle pinion gears → front and rear axle transmission device.

[0109] 15 reverse gears: FR reversing synchronizer combined with R gear, III-IV shift synchronizer combined with III gear, HL gear shift engagement sleeve combined with H gear. The engine power is transmitted from shaft one S1 → upper universal joint drive shaft assembly → shaft two S2 → FR reversing synchronizer → reverse gear driving gear 28 → reverse gear idler gear 29 → reverse gear driven gear 30 → shaft five S5 → forward gear driven gear 31 → forward gear driving gear 9 → shaft three S3 → III-IV shift synchronizer → III gear driving gear 12 → III gear driven gear 16 → shaft six S6 → HL gear shift engagement sleeve → shaft eight S8 → front and rear axle pinion gears → front and rear axle transmission device.

[0110] 16 reverse gears: FR reversing synchronizer combined with R gear, III-IV shift synchronizer combined with IV gear, HL gear shift engagement sleeve combined with H gear. The engine power is transmitted from shaft one S1 → upper universal joint drive shaft assembly → shaft two S2 → FR reversing synchronizer → reverse gear driving gear 28 → reverse gear idler gear 29 → reverse gear driven gear 30 → shaft five S5 → forward gear driven gear 31 → forward gear driving gear 9 → shaft three S3 → III-IV shift synchronizer → IV gear driving gear 13 → IV gear driven gear 17 → shaft six S6 → HL gear shift engagement sleeve → shaft eight S8 → front and rear axle pinion gears → front and rear axle transmission device.

[0111] It should be noted that the parts not described in detail herein are prior art, and the above embodiments are only used to illustrate the present invention, but the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. A tractor transmission system with waist bending and waist twisting functions, comprising a front axle transmission device (1), a shuttle reversing transmission device (3), a waist bending and waist twisting mechanism hinge device (2) hingedly arranged between the front axle transmission device (1) and the shuttle reversing transmission device (3), a main speed shift transmission device (4), a section shift transmission device (5), a rear axle transmission device (7) and a power output transmission device (8), characterized in that: A shaft (S1) for connecting to an engine is installed in the front axle transmission device (1); Seven axes (S7) are installed in the hinge device (2) of the waist bending and twisting mechanism; A second shaft (S2), a fifth shaft (S5) and a tenth shaft (S10) are installed in the shuttle-type reversing transmission device (3); A three-axis (S3), a six-axis (S6) and an eight-axis (S8) are installed in the main speed change gear transmission device (4); A fourth shaft (S4) is installed in the section shift transmission device (5); A nine-shaft (S9) is installed in the power output transmission device (8); The waist bending and twisting mechanism hinge device (2) is connected to the shuttle type reversing transmission device (3) via two shafts (S2) and seven shafts (S7); The shuttle reversing transmission device (3) is connected to the main speed change gear shifting transmission device (4) via a three-axis (S3) and an eight-axis (S8); The main speed shift transmission device (4) is connected to the section shift transmission device (5) via a fourth shaft (S4), a sixth shaft (S6) and an eighth shaft (S8); The section shift transmission device (5) is connected to the rear axle transmission device (7) via a second shaft (S2); The rear axle transmission device (7) is connected to the power output transmission device (8) via a second shaft (S2); The section shift transmission device (5) is further provided with a crawler gear transmission device (6), and the crawler gear transmission device (6) is provided with an LL gear driving gear (20), an LL gear intermediate large gear (21), an LL gear intermediate small gear (22), an LL gear driven gear (23) and an eleventh shaft (S11), wherein: The LL gear driving gear (20) and the L gear driven gear (19) are fixed double gears and are installed coaxially with the eight-axis S8; The eleventh axis (S11) is parallel to the axis center lines of the second axis (S2) and the eighth axis (S8), and they are arranged in a three-axis space; The LL gear intermediate large gear (21) and the LL gear intermediate small gear (22) are fixedly connected to the eleventh shaft (S11); The LL gear driven gear (23) is installed coaxially with the eighth shaft (S8), the hole sleeve is on the eighth shaft (S8), and is connected with the M-LL gear shift engagement sleeve; The LL gear driving gear (20) is meshedly connected with the LL gear intermediate large gear (21), and the LL gear intermediate small gear (22) is meshedly connected with the LL gear driven gear (23).

2. A tractor transmission system with waist bending and waist twisting functions as claimed in claim 1, characterized in that: The front axle transmission device (1) is provided with a first large gear (27) and a first small gear (26) mounted on the seventh shaft (S7) and meshing with the first large gear (27).

3. A tractor transmission system with waist bending and waist twisting functions as claimed in claim 1, characterized in that: The shuttle reversing transmission device (3) is provided with an FR reversing synchronizer, a forward gear driving gear (9), a reverse gear driving gear (28), a reverse gear idler gear (29), a reverse gear driven gear (30) and a forward gear driven gear (31), wherein: The forward gear driving gear (9) is mounted on the third shaft (S3) and is connected to the FR reversing synchronizer; The reverse gear driving gear (28) is installed coaxially with the second shaft (S2) and is connected to the FR reversing synchronizer; The forward gear driven gear (31) is fixedly connected to the fifth shaft (S5) and meshes with the forward gear driving gear (9); The reverse driven gear (30) is fixedly connected to the fifth shaft (S5); The reverse gear idler wheel (29) is fixedly connected to the tenth shaft (S10), and the reverse gear idler wheel (29) is meshed with the reverse gear driving gear (28) and the reverse gear driven gear (30) at the same time.

4. A tractor transmission system with waist bending and waist twisting functions as claimed in claim 1, characterized in that: The main speed shift transmission device (4) is provided with a first gear driving gear (10), a second gear driving gear (11), a third gear driving gear (12), a fourth gear driving gear (13), a first gear driven gear (14), a second gear driven gear (15), a third gear driven gear (16), a fourth gear driven gear (17), a first-second gear shift synchronizer and a third-fourth gear shift synchronizer, wherein: The first gear driving gear (10) and the second gear driving gear (11) are respectively fixedly connected to the third shaft (S3); The III gear driving gear (12) is coaxially mounted on the third shaft (S3) and is connected to the III-IV gear shift synchronizer; The IV gear driving gear (13) is fixedly connected to the fourth shaft (S4) and is connected to the III-IV gear shift synchronizer; The I-speed driven gear (14) and the II-speed driven gear (15) are respectively sleeved on the sixth shaft (S6) with coaxial centerline holes, and the I-speed driven gear (14) and the II-speed driven gear (15) are respectively connected to the I-II shift synchronizer; The third gear driven gear (16) and the fourth gear driven gear (17) are respectively fixedly connected to the sixth shaft S6; The I-speed driving gear (10) meshes with the I-speed driven gear (14), the II-speed driving gear (11) meshes with the II-speed driven gear (15), the III-speed driving gear (12) meshes with the III-speed driven gear (16), and the IV-speed driving gear (13) meshes with the IV-speed driven gear (17).

5. A tractor transmission system with waist bending and waist twisting functions as claimed in claim 1, characterized in that: The section shift transmission device (5) is provided with an L gear driving gear (18), an L gear driven gear (19), an M gear driving gear (24), an M gear driven gear (25), an HL gear shift engagement sleeve and an M-LL gear shift engagement sleeve, wherein: The L gear driving gear (18) and the M gear driving gear (24) are respectively fixedly connected to the fourth shaft S4; The L-gear driven gear (19) and the M-gear driven gear (25) are respectively installed coaxially with the eight-axis S8; The HL gear shift engagement sleeve is connected to the sixth shaft (S6), the L gear driven gear (19) is connected to the HL gear shift engagement sleeve, and the M gear driven gear (25) is connected to the M-LL gear shift engagement sleeve.

6. A tractor transmission system with waist bending and waist twisting functions as claimed in claim 1, characterized in that: A second small bevel gear (36) is provided on the eight-axis (S8) in the rear axle transmission device (7), and a second large bevel gear (37) is meshed with the second small bevel gear (36) to transmit power to the differential assembly.

7. A tractor transmission system with waist bending and waist twisting functions as claimed in claim 1, characterized in that: The power output transmission device (8) is provided with a 720 rpm driving gear (32), a 720 rpm driven gear (33), a 540 rpm driving gear (34), a 540 rpm driven gear (35), and a 540-720 rpm shift engagement sleeve, wherein: The 720 rpm driving gear (32) and the 540 rpm driving gear (34) are fixedly connected to the second shaft (S2); The 720 rpm driven gear (33) and the 540 rpm driven gear (35) are installed coaxially with the ninth shaft (S9) and are connected to the 540-720 rpm gear shifting sleeves respectively; The 720 rpm driving gear (32) and the 720 rpm driven gear (33) are meshed and connected, the 540 rpm driving gear (34) and the 540 rpm driven gear (35) are meshed and connected, and the nine-axis (S9) is connected to the power output shaft head.

8. A tractor transmission system with waist bending and waist twisting functions as claimed in claim 1, characterized in that: One axis (S1), two axes (S2), three axes (S3), four axes (S4) coaxial centerline setting; The five-axis (S5), six-axis (S6), seven-axis (S7), and eight-axis (S8) are arranged coaxially and parallel to the axis centerlines of the one-axis (S1), two-axis (S2), three-axis (S3), and four-axis (S4); Axle nine (S9) is parallel to the axis lines of axis one (S1), axis two (S2), axis three (S3), and axis four (S4), and is not on the same axis line as axis five (S5), axis six (S6), axis seven (S7), and axis eight (S8); from the rear axle of the tractor to the engine, axis ten (S10) and axis eleven (S11) are located on both sides of the left and right symmetry plane of the tractor.

9. A tractor transmission system with waist bending and waist twisting functions as claimed in claim 8, characterized in that: From the rear axle of the tractor to the engine, the tenth axis (S10) is located on the left side of the left-right symmetry plane of the tractor, and the eleventh axis (S11) is located on the right side of the left-right symmetry plane of the tractor.

Images