Multi-gear variable transmission system

Abstract

The invention provides a multi-gear variable-speed transmission system which comprises an input shaft, an idler shaft, a main variable-speed output shaft, an auxiliary variable-speed input shaft, a bevel pinion shaft, a first-gear driving gear, a first clutch assembly and a second clutch assembly. The first-gear driving gear is in clutch transmission connection with the idler shaft and the main variable-speed output shaft, the first clutch assembly is installed on the main variable-speed output shaft, the idler shaft is in transmission connection with the main variable-speed output shaft, gears are installed on the first clutch assembly and the second clutch assembly respectively, and the gear on the first clutch assembly is in transmission connection with the input shaft. A gear on the second clutch assembly is in transmission connection with the main variable-speed output shaft, and the auxiliary variable-speed input shaft is in transmission connection with the main variable-speed output shaft and the small bevel gear shaft.

Description

Technical Field

[0001] This invention relates to the field of vehicle transmission system technology, and more particularly to a multi-speed transmission system. Background Technology

[0002] The power shift technology in agricultural tractors mostly uses a shuttle shifter with a wet clutch. The shuttle shifter, main transmission shifter, crawler shifter, and auxiliary transmission shifter are all arranged separately. To ensure sufficient operating gears and speeds, a large number of gears are needed, resulting in an increased number of gears in the entire transmission system, reduced transmission efficiency, and a larger front and rear wheelbase. Ultimately, this leads to increased manufacturing costs and a decreased user experience. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a multi-speed transmission system that addresses the shortcomings of the prior art.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A multi-speed transmission system, comprising: an input shaft, an idler shaft, a main transmission output shaft, a secondary transmission input shaft, a small bevel gear shaft, a first-speed drive gear, a first clutch assembly, and a second clutch assembly. The first-speed drive gear and the second clutch assembly are both mounted on the input shaft. The first-speed drive gear is clutch-driven to the idler shaft and the main transmission output shaft, respectively. The first clutch assembly is mounted on the main transmission output shaft. The idler shaft is drive-driven to the main transmission output shaft. Gears are mounted on the first clutch assembly and the second clutch assembly, respectively. The gear on the first clutch assembly is drive-driven to the input shaft. The gear on the second clutch assembly is drive-driven to the main transmission output shaft. The secondary transmission input shaft is drive-driven to the main transmission output shaft and the small bevel gear shaft, respectively.

[0005] The beneficial effects of adopting the technical solution of this invention are as follows: the first gear is both the first gear and the reverse gear, reducing the number of gears and improving transmission efficiency. It offers multiple selectable gears and operating speeds, meeting various operating conditions. The clutch cylinder body has a shift gear, reducing both the number of gears and the number of clutches, effectively reducing the axial clearance of the transmission system and thus reducing the wheelbase.

[0006] Furthermore, the first clutch assembly includes: a first clutch, a third clutch, and a first clutch cylinder, both the first clutch and the third clutch being installed in the first clutch cylinder and both the first clutch and the third clutch being installed on the main transmission output shaft; the second clutch assembly includes: a second clutch, a fourth clutch, and a second clutch cylinder, both the second clutch and the fourth clutch being installed in the second clutch cylinder and both the second clutch and the fourth clutch being installed on the input shaft; a second-speed driven gear is installed on the first clutch cylinder, and a third-speed driving gear is installed on the second clutch cylinder; the second-speed driven gear is clutch-driven connected to the input shaft, and the third-speed driving gear is clutch-driven connected to the main transmission output shaft.

[0007] The beneficial effects of adopting the above-mentioned further technical solution are as follows: In forward mode, the transmission is transmitted to the main transmission output shaft via the forward clutch. The first gear drive gear is both the first gear drive gear and the reverse gear drive gear, reducing the number of gears and improving transmission efficiency. The second gear driven gear and the third gear drive gear are integrated into the clutch cylinder body, which reduces both the number of gears and the number of clutches, effectively reducing the axial clearance of the transmission system of this invention, and thus reducing the wheelbase.

[0008] Furthermore, a second-speed drive gear and a fourth-speed drive gear are installed on the input shaft; a first reverse idler gear, a reverse clutch, and a second reverse idler gear are installed on the idler shaft; a first-speed driven gear, a third-speed driven gear, a fourth-speed driven gear, and a reverse driven gear are installed on the main transmission output shaft; the first-speed drive gear meshes with the first reverse idler gear and the first-speed driven gear respectively, the second-speed drive gear meshes with the second-speed driven gear, the third-speed drive gear meshes with the third-speed driven gear, the fourth-speed drive gear meshes with the fourth-speed driven gear, and the second reverse idler gear meshes with the reverse driven gear.

[0009] The beneficial effects of adopting the above-mentioned further technical solution are as follows: In reverse mode, power is transmitted from the input shaft to the main transmission output shaft via the idler gear shaft through the reverse clutch. The first gear drive gear is both the first gear drive gear and the reverse gear drive gear, reducing the number of gears and improving transmission efficiency. The second gear driven gear and the third gear drive gear are integrated into the clutch cylinder body, which reduces both the number of gears and the number of clutches, effectively reducing the axial clearance of the transmission system of this invention, thereby reducing the wheelbase.

[0010] Furthermore, the first clutch, second clutch, third clutch, fourth clutch, and reverse clutch are all wet clutches; the first clutch, second clutch, third clutch, fourth clutch, and reverse clutch are all connected to an electro-hydraulic control system; the first gear driven gear is rotatably mounted on the main transmission output shaft via a bearing, and is connected to the first clutch via a spline; the second gear driven gear is rotatably mounted on the input shaft via a bearing, and is connected to the second clutch via a spline; the third gear driven gear is rotatably mounted on the main transmission output shaft via a bearing, and is connected to the third clutch via a spline; the fourth gear driven gear is rotatably mounted on the input shaft via a bearing, and is connected to the fourth clutch via a spline; the first reverse idler gear is rotatably mounted on the idler gear shaft via a bearing, and is connected to the reverse clutch via a spline.

[0011] The beneficial effects of adopting the above-mentioned further technical solution are: The wet clutch enables forward / reverse mode switching and forward gear switching, improving reliability and stability, and extending service life. The main transmission shifting uses a wet clutch structure, controlled by electro-hydraulic mechanisms. Gear shifting is achieved via a button, eliminating the need for frequent clutch engagement and simplifying the operation. In forward mode, power is transmitted to the main transmission output shaft via the forward clutch; in reverse mode, power is transmitted from the input shaft to the main transmission output shaft via the idler gear shaft through the reverse clutch. The first gear drive gear is both the first gear drive gear and the reverse gear drive gear, reducing the number of gears and improving transmission efficiency. The second gear driven gear and the third gear drive gear are integrated into the clutch cylinder, reducing both the number of gears and the number of clutches, effectively reducing the axial clearance of the transmission system and thus reducing the wheelbase.

[0012] Furthermore, the main transmission output shaft is connected to the auxiliary transmission input shaft via a high / low gear shifting mechanism; the auxiliary transmission input shaft is connected to the small bevel gear shaft via an auxiliary transmission shifting mechanism.

[0013] The beneficial effects of adopting the above-mentioned further technical solutions are: the setting of high and low gear shifting mechanisms and auxiliary gear shifting mechanisms further increases the number of selectable gears, and the more selectable gears and operating speeds, the more they can meet the speed requirements of various operating conditions.

[0014] Furthermore, the input shaft is connected to a first power output shaft; the high / low gear shifting mechanism includes: a first high / low gear dual shaft, a first gear shifting mechanism, a first high-gear drive gear, a first high-gear driven gear, a first low-gear drive gear, and a first low-gear driven gear. The auxiliary transmission input shaft is connected to the main transmission output shaft via the first gear shifting mechanism. The first high-gear drive gear is splined on the main transmission output shaft, and the first high-gear driven gear and the first low-gear drive gear are splined on the first high / low gear dual shaft, respectively. The first low-gear driven gear is rotatably mounted on the auxiliary transmission input shaft via a needle roller bearing. The first high-gear drive gear meshes with the first high-gear driven gear, and the first low-gear drive gear meshes with the first low-gear driven gear; the auxiliary gear shifting mechanism includes: a first F-gear drive gear, a first E-gear drive gear, a first D-gear drive gear, a first C-gear drive gear, a first B-gear drive gear, a first A-gear drive gear, a first F-gear driven gear, a first E-gear driven gear, a first D-gear driven gear, a first C-gear driven gear, a first B-gear driven gear, and a first A-gear driven gear. The first F-gear drive gear meshes with the first F-gear driven gear, and the first E-gear drive gear meshes with the first E-gear driven gear. The first D gear drive gear meshes with the first D gear driven gear; the first C gear drive gear meshes with the first C gear driven gear; the first B gear drive gear meshes with the first B gear driven gear; and the first A gear drive gear meshes with the first A gear driven gear. The first A gear driven gear, first B gear driven gear, first C gear driven gear, and first D gear driven gear are rotatably mounted on the small bevel gear shaft via needle roller bearings. The first E gear driven gear and the first F gear driven gear are splined onto the small bevel gear shaft. The first A gear drive gear, first B gear drive gear, first C gear drive gear, and first D gear driven gear... A first D-gear drive gear is mounted on the secondary transmission input shaft via a spline; a first E-gear drive gear and a first F-gear drive gear are rotatably mounted on the secondary transmission input shaft via needle roller bearings; a second gear shifting mechanism is mounted on the secondary transmission input shaft, located between the first F-gear drive gear and the first E-gear drive gear; a third gear shifting mechanism and a fourth gear shifting mechanism are mounted on the small bevel gear shaft, the third gear shifting mechanism being located between the first D-gear driven gear and the first C-gear driven gear, and the fourth gear shifting mechanism being located between the first B-gear driven gear and the first A-gear driven gear.

[0015] The beneficial effects of adopting the above-mentioned further technical solution are as follows: In forward mode, the main transmission shifting device has 4 variable gears, the high / low gear shifting device has 2 variable gears, and the auxiliary transmission shifting device has 6 variable gears, resulting in a total of 48 forward gears in forward mode. In reverse mode, the main transmission shifting device has 1 variable gear, the high / low gear shifting device has 2 variable gears, and the auxiliary transmission shifting device has 6 variable gears, resulting in a total of 12 reverse gears in reverse mode. This provides a wide range of selectable gears and operating speeds, satisfying various operating conditions. The engagement of the gear shifting mechanism enables gear switching. The inclusion of the high / low gear shifting mechanism and the auxiliary transmission shifting mechanism further increases the number of selectable gears, allowing for a wider range of operating speeds and satisfying various operating conditions.

[0016] Furthermore, the secondary transmission input shaft is a hollow spline shaft, and a second power output shaft is rotatably sleeved within the secondary transmission input shaft, the second power output shaft being connected to the input shaft; the high / low gear shifting mechanism includes: a fifth gear shifting mechanism, a second high-gear drive gear, a second high-gear driven gear, a second low-gear drive gear, and a second low-gear driven gear. The fifth gear shifting mechanism is splined onto the main transmission output shaft; the second high-gear drive gear and the second low-gear drive gear are rotatably sleeved on the main transmission output shaft via needle roller bearings, the fifth gear shifting mechanism is located between the second high-gear drive gear and the second low-gear drive gear, and the second high-gear driven gear... The gearbox and the second low-gear driven gear are both mounted on the secondary transmission input shaft via splines. The second high-gear drive gear meshes with the second high-gear driven gear, and the second low-gear drive gear meshes with the second low-gear driven gear. The secondary transmission shifting mechanism includes: a second A-gear drive gear, a second B-gear drive gear, a second C-gear drive gear, a second D-gear drive gear, a second E-gear drive gear, a second F-gear drive gear, a second F-gear driven gear, a second E-gear driven gear, a second D-gear driven gear, a second C-gear driven gear, a second B-gear driven gear, and a second A-gear driven gear. The second F-gear drive gear meshes with the second F-gear driven gear. The second E gear drive gear meshes with the second E gear driven gear; the second D gear drive gear meshes with the second D gear driven gear; the second C gear drive gear meshes with the second C gear driven gear; the second B gear drive gear meshes with the second B gear driven gear; the second A gear drive gear meshes with the second A gear driven gear; the second A gear drive gear, second B gear drive gear, second C gear drive gear, and second D gear drive gear are mounted on the auxiliary transmission input shaft via splines; the second E gear drive gear and the second F gear drive gear are rotatably mounted on the auxiliary transmission input shaft via needle roller bearings; the second A gear driven gear, second B gear driven gear, and second D gear drive gear... The second C-gear driven gear and the second D-gear driven gear are rotatably mounted on the small bevel gear shaft via needle roller bearings; the second E-gear driven gear and the second F-gear driven gear are mounted on the small bevel gear shaft via splines; a sixth gear shifting mechanism is installed on the auxiliary transmission input shaft, located between the second F-gear drive gear and the second E-gear drive gear; a seventh gear shifting mechanism and an eighth gear shifting mechanism are installed on the small bevel gear shaft, located between the second D-gear driven gear and the second C-gear driven gear, and between the second B-gear driven gear and the second A-gear driven gear.

[0017] The beneficial effects of adopting the above-mentioned further technical solutions are: as alternatives to the above solutions, multiple solutions allow users to choose different structural types according to their actual needs. In forward mode, the main transmission shifting device has 4 variable gears, the high / low gear shifting device has 2 variable gears, and the auxiliary transmission shifting device has 6 variable gears, resulting in a total of 48 forward gears. In reverse mode, the main transmission shifting device has 1 variable gear, the high / low gear shifting device has 2 variable gears, and the auxiliary transmission shifting device has 6 variable gears, resulting in a total of 12 reverse gears. The engagement of the gear shifting mechanism enables gear switching. The inclusion of the high / low gear shifting mechanism and the auxiliary transmission shifting mechanism further increases the number of selectable gears, allowing for a wider range of selectable operating speeds and meeting various operating conditions.

[0018] Furthermore, the input shaft is connected to a third power output shaft; the high / low gear shifting mechanism includes: a second high / low gear shaft, a ninth gear shifting mechanism, a third high-gear drive gear, a third high-gear driven gear, a third low-gear drive gear, and a third low-gear driven gear. The auxiliary transmission input shaft is connected to the main transmission output shaft via the ninth gear shifting mechanism; the third high-gear drive gear is splined on the main transmission output shaft, the third high-gear driven gear and the third low-gear drive gear are splined on the second high / low gear shaft, and the third low-gear driven gear is rotatably mounted on the auxiliary transmission input shaft via a needle roller bearing. The third high-gear drive gear meshes with the third high-gear driven gear, and the third low-gear drive gear meshes with the third low-gear driven gear; the auxiliary transmission shifting mechanism includes: a third D-gear drive gear, a third C-gear drive gear, a third B-gear drive gear, a third A-gear drive gear, a third D-gear driven gear, and a third C-gear driven gear. The transmission includes gears, a third B-gear driven gear, a third A-gear driven gear, a third D-gear driving gear meshing with a third D-gear driven gear, a third C-gear driving gear meshing with a third C-gear driven gear, a third B-gear driving gear meshing with a third B-gear driven gear, and a third A-gear driving gear meshing with a third A-gear driven gear. The third A-gear, third B-gear, third C-gear, and third D-gear driven gears are splined onto a small bevel gear shaft. The third A-gear, third B-gear, third C-gear, and third D-gear driving gears are rotatably mounted on the auxiliary transmission input shaft via needle roller bearings. The auxiliary transmission input shaft is equipped with a tenth gear shifting mechanism and an eleventh gear shifting mechanism. The tenth gear shifting mechanism is located between the third D-gear and third C-gear driving gears, and the eleventh gear shifting mechanism is located between the third B-gear and third A-gear driving gears.

[0019] The beneficial effects of adopting the above-mentioned further technical solutions are as follows: As alternatives to the above solutions, multiple solutions allow users to choose different structural types according to their actual needs. For example, if a multi-segment speed range is not required, the number of gears in the auxiliary transmission device can be reduced, eliminating the E-gear drive gear, E-gear driven gear, F-gear drive gear, and F-gear driven gear. In forward mode, the main transmission shifting device has 4 variable gears, the high / low gear shifting device has 2 variable gears, and the auxiliary transmission shifting device has 4 variable gears, resulting in a total of 32 forward gears. In reverse mode, the main transmission shifting device has 1 variable gear, the high / low gear shifting device has 2 variable gears, and the auxiliary transmission shifting device has 4 variable gears, resulting in a total of 8 reverse gears. The engagement of the gear shifting mechanism enables gear switching. The addition of the high / low gear shifting mechanism and the auxiliary transmission shifting mechanism further increases the number of selectable gears, allowing for a wider range of selectable operating speeds and meeting various operating conditions.

[0020] Furthermore, the secondary transmission input shaft is a hollow spline shaft, and a fourth power output shaft is rotatably sleeved within the secondary transmission input shaft, connected to the input shaft; the high / low gear shifting mechanism includes: a twelfth gear shifting mechanism, a fourth high-gear drive gear, a fourth high-gear driven gear, a fourth low-gear drive gear, and a fourth low-gear driven gear. The twelfth gear shifting mechanism is splined onto the main transmission output shaft. The fourth high-gear drive gear and the fourth low-gear drive gear are both rotatably sleeved onto the main transmission output shaft via needle roller bearings. The twelfth gear shifting mechanism is located between the fourth high-gear drive gear and the fourth low-gear drive gear. The fourth high-gear driven gear and the fourth low-gear driven gear are both splined onto the secondary transmission input shaft. The fourth high-gear drive gear meshes with the fourth high-gear driven gear, and the fourth low-gear drive gear meshes with the fourth low-gear driven gear; the secondary transmission shifting mechanism includes: a fourth A-gear drive gear, a fourth B-gear drive gear, a fourth C-gear drive gear, and a fourth D-gear drive gear. The transmission includes a gearbox, fourth D-gear driven gear, fourth C-gear driven gear, fourth B-gear driven gear, and fourth A-gear driven gear. The fourth D-gear drive gear meshes with the fourth D-gear driven gear, the fourth C-gear drive gear meshes with the fourth C-gear driven gear, the fourth B-gear drive gear meshes with the fourth B-gear driven gear, and the fourth A-gear drive gear meshes with the fourth A-gear driven gear. The fourth A-gear drive gear, fourth B-gear drive gear, fourth C-gear drive gear, and fourth D-gear drive gear are all splined on the auxiliary transmission input shaft. The fourth A-gear drive gear, fourth B-gear drive gear, fourth C-gear drive gear, and fourth D-gear drive gear are rotatably mounted on the small bevel gear shaft via needle roller bearings. The small bevel gear shaft is equipped with a thirteenth gear shifting mechanism and a fourteenth gear shifting mechanism. The thirteenth gear shifting mechanism is located between the fourth D-gear driven gear and the fourth C-gear driven gear, and the fourteenth gear shifting mechanism is located between the fourth B-gear driven gear and the fourth A-gear driven gear.

[0021] The beneficial effects of adopting the above-mentioned further technical solutions are: as alternatives to the above solutions, multiple solutions allow users to choose different structural types according to their actual needs. Similarly, the number of gears in the auxiliary transmission device is reduced by eliminating the E-gear drive gear, E-gear driven gear, F-gear drive gear, and F-gear driven gear. In forward mode, this technical route has 4 variable gears in the main transmission shifting device, 2 variable gears in the high / low gear shifting device, and 4 variable gears in the auxiliary transmission shifting device, resulting in a total of 32 forward gears. In reverse mode, the main transmission shifting device has 1 variable gear, the high / low gear shifting device has 2 variable gears, and the auxiliary transmission shifting device has 4 variable gears, resulting in a total of 8 reverse gears. The engagement of the gear shifting mechanism enables gear switching. The high / low gear shifting mechanism and the auxiliary transmission shifting mechanism further increase the selectable gears, allowing for a wider range of selectable operating speeds and meeting various operating conditions.

[0022] Furthermore, the input shaft, idler shaft, and main transmission output shaft are arranged in a triangular structure; the auxiliary transmission shifting device is arranged in a parallel shaft arrangement, or the input shaft, auxiliary transmission input shaft, and small bevel gear shaft are arranged in a triangular structure; a small bevel gear is mounted on the small bevel gear shaft, and the small bevel gear is connected to the wheel; the input shaft is connected to the engine through a torsional damper.

[0023] The beneficial effects of adopting the above-mentioned further technical solution are: the positional design between shafts facilitates the installation and maintenance of various components, simplifies the structure, and reduces space occupation. It can effectively reduce the axial clearance of the transmission system of this invention, thereby reducing the wheelbase.

[0024] The advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is one of the structural schematic diagrams of a multi-speed transmission system provided in an embodiment of the present invention.

[0027] Figure 2 This is the second schematic diagram of the multi-speed transmission system provided in the embodiment of the present invention.

[0028] Figure 3 This is the third schematic diagram of the multi-speed transmission system provided in the embodiment of the present invention.

[0029] Figure 4 The fourth schematic diagram of the multi-speed transmission system provided in the embodiment of the present invention.

[0030] Reference numerals: 1. Input shaft; 2. Idler shaft; 3. Main transmission output shaft; 4. Secondary transmission input shaft; 5. Small bevel gear shaft; 6. First gear drive gear; 7. First clutch; 8. Third clutch; 9. Second clutch; 10. Fourth clutch; 11. Second gear driven gear; 12. Third gear drive gear; 13. Second gear drive gear; 14. Fourth gear drive gear; 15. First reverse idler gear; 16. Reverse clutch; 17. Second reverse idler gear; 18. First gear driven gear; 19. Fourth gear driven gear; 20. Reverse driven gear; 21. Third gear driven gear; 22. First power output shaft; 23. First high / low gear shaft; 24. First gear shifting mechanism; 25. First high gear drive gear; 26. First high gear drive gear; 27. First low-gear drive gear; 28. First low-gear drive gear; 29. ​​First F-gear drive gear; 30. First E-gear drive gear; 31. First D-gear drive gear; 32. First C-gear drive gear; 33. First B-gear drive gear; 34. First A-gear drive gear; 35. First F-gear driven gear; 36. First E-gear driven gear; 37. First D-gear driven gear; 38. First C-gear driven gear; 39. First B-gear driven gear; 40. First A-gear driven gear; 41. Second gear shifting mechanism; 42. Third gear shifting mechanism; 43. Fourth gear shifting mechanism; 44. Second power output shaft; 45. Fifth gear shifting mechanism; 46. Second high-gear drive gear; 47. 48. Second high-gear driven gear; 49. Second low-gear driven gear; 50. Second A-gear driven gear; 51. Second B-gear driven gear; 52. Second C-gear driven gear; 53. Second D-gear driven gear; 54. Second E-gear driven gear; 55. Second F-gear driven gear; 56. Second F-gear driven gear; 57. Second E-gear driven gear; 58. Second D-gear driven gear; 59. Second C-gear driven gear; 60. Second B-gear driven gear; 61. Second A-gear driven gear; 62. Sixth gear shifting mechanism; 63. Seventh gear shifting mechanism; 64. Eighth gear shifting mechanism; 65. Third power output shaft; 66. Second high / low gear dual shaft; 67. Ninth gear shifting mechanism; 68. 69. Third high-gear drive gear; 70. Third low-gear drive gear; 71. Third low-gear driven gear; 72. Third D-gear drive gear; 73. Third C-gear drive gear; 74. Third B-gear drive gear; 75. Third A-gear drive gear; 76. Third D-gear driven gear; 77. Third C-gear driven gear; 78. Third B-gear driven gear; 79. Third A-gear driven gear; 80. Tenth gear shifting mechanism; 81. Eleventh gear shifting mechanism; 82. Fourth power output shaft; 83. Twelfth gear shifting mechanism; 84. Fourth high-gear drive gear; 85. Fourth high-gear driven gear; 86. Fourth low-gear drive gear; 87. Fourth low-gear driven gear; 88. Fourth A-gear drive gear;89. Fourth B gear drive gear; 90. Fourth C gear drive gear; 91. Fourth D gear drive gear; 92. Fourth D gear driven gear; 93. Fourth C gear driven gear; 94. Fourth B gear driven gear; 95. Fourth A gear driven gear; 96. Thirteenth gear shifting mechanism; 97. Fourteenth gear shifting mechanism; 98. Small bevel gear; 99. Main transmission shifting device; 100. High / low gear shifting device; 101. Secondary transmission shifting device. Detailed Implementation

[0031] The principles and features of the present invention are described below with reference to the accompanying drawings. The embodiments described are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "horizontal", "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0036] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0037] like Figures 1 to 4 As shown, this embodiment of the invention provides a multi-speed transmission system, including: an input shaft 1, an idler shaft 2, a main transmission output shaft 3, a secondary transmission input shaft 4, a small bevel gear shaft 5, a first-speed drive gear 6, a first clutch assembly, and a second clutch assembly. The first-speed drive gear 6 and the second clutch assembly are both mounted on the input shaft 1. The first-speed drive gear 6 is coupled to the idler shaft 2 and the main transmission output shaft 3 respectively. The first clutch assembly is mounted on the main transmission output shaft 3. The idler shaft 2 is coupled to the main transmission output shaft 3. Gears are mounted on the first clutch assembly and the second clutch assembly respectively. The gear on the first clutch assembly is coupled to the input shaft 1, and the gear on the second clutch assembly is coupled to the main transmission output shaft 3. The secondary transmission input shaft 4 is coupled to the main transmission output shaft 3 and the small bevel gear shaft 5 respectively.

[0038] The beneficial effects of adopting the technical solution of this invention are as follows: the first gear is both the first gear and the reverse gear, reducing the number of gears and improving transmission efficiency. It offers multiple selectable gears and operating speeds, meeting various operating conditions. The clutch cylinder body has a shift gear, reducing both the number of gears and the number of clutches, effectively reducing the axial clearance of the transmission system and thus reducing the wheelbase.

[0039] like Figures 1 to 4As shown, this embodiment of the invention provides a multi-speed transmission system, which can be a 48+12 speed transmission system. The transmission system (multi-speed transmission system) is divided into a main transmission shifting device 99, a high-low gear shifting device 100, and a secondary transmission shifting device 101. The main transmission shifting device 99 is sequentially provided with reverse gear, first gear, second gear, third gear, and fourth gear; the high-low gear shifting device 100 is provided with high gear and low gear; and the secondary transmission shifting device 101 is sequentially provided with A gear, B gear, C gear, D gear, E gear, and F gear. The advantages of this invention are as follows: In forward mode, the main transmission shifting device 99 has 4 variable gears, the high / low gear shifting device 100 has 2 variable gears, and the auxiliary transmission shifting device 101 has 6 variable gears, resulting in a total of 48 forward gears. In reverse mode, the main transmission shifting device 99 has 1 variable gear, the high / low gear shifting device 100 has 2 variable gears, and the auxiliary transmission shifting device 101 has 6 variable gears, resulting in a total of 12 reverse gears. This provides a wide range of selectable gears and operating speeds, satisfying various operating conditions. The main transmission shifting device 99 integrates shuttle shifting and main transmission shifting. The first gear is both the first and reverse drive gear, reducing the number of gears and improving transmission efficiency. The second and third gears are integrated into the clutch cylinder, further reducing the number of gears and clutches, effectively reducing the axial clearance of the transmission system and thus the wheelbase.

[0040] like Figures 1 to 4 As shown, further, the first clutch assembly includes: a first clutch 7, a third clutch 8, and a first clutch cylinder body. The first clutch 7 and the third clutch 8 are both installed in the first clutch cylinder body and are both installed on the main transmission output shaft 3. The second clutch assembly includes: a second clutch 9, a fourth clutch 10, and a second clutch cylinder body. The second clutch 9 and the fourth clutch 10 are both installed in the second clutch cylinder body and are both installed on the input shaft 1. A second-speed driven gear 11 is installed on the first clutch cylinder body, and a third-speed driving gear 12 is installed on the second clutch cylinder body. The second-speed driven gear 11 is clutch-driven connected to the input shaft 1, and the third-speed driving gear 12 is clutch-driven connected to the main transmission output shaft 3.

[0041] The beneficial effects of adopting the above-mentioned further technical solution are as follows: In forward mode, the transmission is transmitted to the main transmission output shaft via the forward clutch. The first gear drive gear is both the first gear drive gear and the reverse gear drive gear, reducing the number of gears and improving transmission efficiency. The second gear driven gear and the third gear drive gear are integrated into the clutch cylinder body, which reduces both the number of gears and the number of clutches, effectively reducing the axial clearance of the transmission system of this invention, and thus reducing the wheelbase.

[0042] like Figures 1 to 4 As shown, the input shaft 1 is further equipped with a second-speed drive gear 13 and a fourth-speed drive gear 14; the idler shaft 2 is equipped with a first reverse idler gear 15, a reverse clutch 16, and a second reverse idler gear 17; the main transmission output shaft 3 is equipped with a first-speed driven gear 18, a third-speed driven gear 21, a fourth-speed driven gear 19, and a reverse driven gear 20; the first-speed drive gear 6 meshes with the first reverse idler gear 15 and the first-speed driven gear 18 respectively, the second-speed drive gear 13 meshes with the second-speed driven gear 11, the third-speed drive gear 12 meshes with the third-speed driven gear 21, the fourth-speed drive gear 14 meshes with the fourth-speed driven gear 19, and the second reverse idler gear 17 meshes with the reverse driven gear 20.

[0043] The beneficial effects of adopting the above-mentioned further technical solution are as follows: In reverse mode, power is transmitted from the input shaft to the main transmission output shaft via the idler gear shaft through the reverse clutch. The first gear drive gear is both the first gear drive gear and the reverse gear drive gear, reducing the number of gears and improving transmission efficiency. The second gear driven gear and the third gear drive gear are integrated into the clutch cylinder body, which reduces both the number of gears and the number of clutches, effectively reducing the axial clearance of the transmission system of this invention, thereby reducing the wheelbase.

[0044] like Figures 1 to 4 As shown, further, the first clutch 7, the second clutch 9, the third clutch 8, the fourth clutch 10, and the reverse clutch 16 are all wet clutches; the first clutch 7, the second clutch 9, the third clutch 8, the fourth clutch 10, and the reverse clutch 16 are all connected to an electro-hydraulic control system; the first gear driven gear 18 is rotatably mounted on the main transmission output shaft 3 via a bearing, and the first gear driven gear 18 is connected to the first clutch 7 via a spline; the second gear driving gear 13 is rotatably mounted on the input shaft 1 via a bearing, and the second gear driving gear 13 is connected to the second clutch 9 via a spline; the third gear driven gear 21 is rotatably mounted on the main transmission output shaft 3 via a bearing, and the third gear driving gear 12 is connected to the third clutch 8 via a spline; the fourth gear driving gear 14 is rotatably mounted on the input shaft 1 via a bearing, and the fourth gear driving gear 14 is connected to the fourth clutch 10 via a spline; the first reverse idler gear 15 is rotatably mounted on the idler gear shaft 2 via a bearing, and the first reverse idler gear 15 is connected to the reverse clutch 16 via a spline.

[0045] The beneficial effects of adopting the above-mentioned further technical solution are: The wet clutch enables forward / reverse mode switching and forward gear switching, improving reliability and stability, and extending service life. The main transmission shifting uses a wet clutch structure, controlled by electro-hydraulic mechanisms. Gear shifting is achieved via a button, eliminating the need for frequent clutch engagement and simplifying the operation. In forward mode, power is transmitted to the main transmission output shaft via the forward clutch; in reverse mode, power is transmitted from the input shaft to the main transmission output shaft via the idler gear shaft through the reverse clutch. The first gear drive gear is both the first gear drive gear and the reverse gear drive gear, reducing the number of gears and improving transmission efficiency. The second gear driven gear and the third gear drive gear are integrated into the clutch cylinder, reducing both the number of gears and the number of clutches, effectively reducing the axial clearance of the transmission system and thus reducing the wheelbase.

[0046] like Figures 1 to 4 As shown, the main transmission output shaft 3 is further connected to the auxiliary transmission input shaft 4 via a high-low gear shifting mechanism; the auxiliary transmission input shaft 4 is connected to the small bevel gear shaft 5 via an auxiliary transmission shifting mechanism.

[0047] The beneficial effects of adopting the above-mentioned further technical solutions are: the setting of high and low gear shifting mechanisms and auxiliary gear shifting mechanisms further increases the number of selectable gears, and the more selectable gears and operating speeds, the more they can meet the speed requirements of various operating conditions.

[0048] like Figure 1As shown, further, the input shaft 1 is connected to a first power output shaft 22; the high and low gear shifting mechanism includes: a first high and low gear shaft 23, a first gear shifting mechanism 24, a first high gear drive gear 25, a first high gear driven gear 26, a first low gear drive gear 27, and a first low gear driven gear 28. The auxiliary transmission input shaft 4 is connected to the main transmission output shaft 3 via the first gear shifting mechanism 24; the first high gear drive gear 25 is splined on the main transmission output shaft 3, the first high gear driven gear 26 and the first low gear drive gear 27 are splined on the first high and low gear shaft 23 respectively, and the first low gear driven gear 28 is rotatably sleeved on the auxiliary transmission input shaft 4 via a needle roller bearing. The high-gear drive gear 25 meshes with the first high-gear driven gear 26, and the first low-gear drive gear 27 meshes with the first low-gear driven gear 28. The auxiliary gear shifting mechanism includes: a first F-gear drive gear 29, a first E-gear drive gear 30, a first D-gear drive gear 31, a first C-gear drive gear 32, a first B-gear drive gear 33, a first A-gear drive gear 34, a first F-gear driven gear 35, a first E-gear driven gear 36, a first D-gear driven gear 37, a first C-gear driven gear 38, a first B-gear driven gear 39, and a first A-gear driven gear 40. The first F-gear drive gear 29 meshes with the first F-gear driven gear 35, and the first E-gear drive gear 30 meshes with the first E-gear driven gear 28. 6. Engagement: The first D gear drive gear 31 meshes with the first D gear driven gear 37; the first C gear drive gear 32 meshes with the first C gear driven gear 38; the first B gear drive gear 33 meshes with the first B gear driven gear 39; and the first A gear drive gear 34 meshes with the first A gear driven gear 40. The first A gear driven gear 40, the first B gear driven gear 39, the first C gear driven gear 38, and the first D gear driven gear 37 are rotatably mounted on the small bevel gear shaft 5 via needle roller bearings. The first E gear driven gear 36 and the first F gear driven gear 35 are splined onto the small bevel gear shaft 5. The first A gear drive gear 34, the first B gear drive gear 33, and the first C gear drive gear 32... The first D gear drive gear 31 is mounted on the auxiliary transmission input shaft 4 via a spline; the first E gear drive gear 30 and the first F gear drive gear 29 are rotatably mounted on the auxiliary transmission input shaft 4 via needle roller bearings; a second gear shifting mechanism 41 is mounted on the auxiliary transmission input shaft 4, and the second gear shifting mechanism 41 is located between the first F gear drive gear 29 and the first E gear drive gear 30; a third gear shifting mechanism 42 and a fourth gear shifting mechanism 43 are mounted on the small bevel gear shaft 5, the third gear shifting mechanism 42 is located between the first D gear driven gear 37 and the first C gear driven gear 38, and the fourth gear shifting mechanism 43 is located between the first B gear driven gear 39 and the first A gear driven gear 40.

[0049] The beneficial effects of adopting the above-mentioned further technical solution are as follows: In forward mode, the main transmission shifting device has 4 variable gears, the high / low gear shifting device has 2 variable gears, and the auxiliary transmission shifting device has 6 variable gears, resulting in a total of 48 forward gears in forward mode. In reverse mode, the main transmission shifting device has 1 variable gear, the high / low gear shifting device has 2 variable gears, and the auxiliary transmission shifting device has 6 variable gears, resulting in a total of 12 reverse gears in reverse mode. This provides a wide range of selectable gears and operating speeds, satisfying various operating conditions. The engagement of the gear shifting mechanism enables gear switching. The inclusion of the high / low gear shifting mechanism and the auxiliary transmission shifting mechanism further increases the number of selectable gears, allowing for a wider range of operating speeds and satisfying various operating conditions.

[0050] The first gear shifting mechanism 24 can engage the first low-gear driven gear 28 with the auxiliary transmission input shaft 4 or the first high-gear driving gear 25 with the auxiliary transmission input shaft 4. When the first low-gear driven gear 28 is engaged with the auxiliary transmission input shaft 4, the power route is: first high-gear driving gear 25 - first high-gear driven gear 26 - first low-gear driving gear 27 - first low-gear driven gear 28 - auxiliary transmission input shaft 4. When the first high-gear driving gear 25 is engaged with the auxiliary transmission input shaft 4, the first high-gear driving gear 25 - auxiliary transmission input shaft 4, and the first low-gear driven gear 28 idles.

[0051] like Figure 2As shown, alternatively, the secondary transmission input shaft 4 is a hollow spline shaft, and a second power output shaft 44 is rotatably sleeved in the secondary transmission input shaft 4, which is connected to the input shaft 1; the high and low gear shifting mechanism includes: a fifth gear shifting mechanism 45, a second high gear drive gear 46, a second high gear driven gear 47, a second low gear drive gear 48, and a second low gear driven gear 49. The fifth gear shifting mechanism 45 is splined on the main transmission output shaft 3; the second high gear drive gear 46 and the second low gear drive gear 48 are both rotatably sleeved on the main transmission output shaft 3 via needle roller bearings, and the fifth gear shifting mechanism 45 is located between the second high gear drive gear 46 and the second low gear drive gear 48, and the second high gear driven gear 49... Both the second low-gear driven gear 47 and the second low-gear driven gear 49 are splined onto the auxiliary transmission input shaft 4. The second high-gear driving gear 46 meshes with the second high-gear driven gear 47, and the second low-gear driving gear 48 meshes with the second low-gear driven gear 49. The auxiliary transmission shifting mechanism includes: the second A-gear driving gear 50, the second B-gear driving gear 51, the second C-gear driving gear 52, the second D-gear driving gear 53, the second E-gear driving gear 54, the second F-gear driving gear 55, the second F-gear driven gear 56, the second E-gear driven gear 57, the second D-gear driven gear 58, the second C-gear driven gear 59, the second B-gear driven gear 60, and the second A-gear driven gear 61. The second F-gear driving gear 55 meshes with the second F-gear driven gear 56. The second E gear drive gear 54 meshes with the second E gear driven gear 57; the second D gear drive gear 53 meshes with the second D gear driven gear 58; the second C gear drive gear 52 meshes with the second C gear driven gear 59; the second B gear drive gear 51 meshes with the second B gear driven gear 60; and the second A gear drive gear 50 meshes with the second A gear driven gear 61. The second A gear drive gear 50, second B gear drive gear 51, second C gear drive gear 52, and second D gear drive gear 53 are all splined onto the auxiliary transmission input shaft 4. The second E gear drive gear 54 and the second F gear drive gear 55 are rotatably mounted on the auxiliary transmission input shaft 4 via needle roller bearings. The second A gear driven gear 61 and the second B gear driven gear 60... The second C-gear driven gear 59 and the second D-gear driven gear 58 are rotatably mounted on the small bevel gear shaft 5 via needle roller bearings; the second E-gear driven gear 57 and the second F-gear driven gear 56 are mounted on the small bevel gear shaft 5 via splines; a sixth gear shifting mechanism 62 is installed on the auxiliary transmission input shaft 4, which is located between the second F-gear drive gear 55 and the second E-gear drive gear 54; a seventh gear shifting mechanism 63 and an eighth gear shifting mechanism 64 are installed on the small bevel gear shaft 5, which are located between the second D-gear driven gear 58 and the second C-gear driven gear 59, and the eighth gear shifting mechanism 64 is located between the second B-gear driven gear 60 and the second A-gear driven gear 61.

[0052] The beneficial effects of adopting the above-mentioned further technical solutions are: as alternatives to the above solutions, multiple solutions allow users to choose different structural types according to their actual needs. In forward mode, the main transmission shifting device has 4 variable gears, the high / low gear shifting device has 2 variable gears, and the auxiliary transmission shifting device has 6 variable gears, resulting in a total of 48 forward gears. In reverse mode, the main transmission shifting device has 1 variable gear, the high / low gear shifting device has 2 variable gears, and the auxiliary transmission shifting device has 6 variable gears, resulting in a total of 12 reverse gears. The engagement of the gear shifting mechanism enables gear switching. The inclusion of the high / low gear shifting mechanism and the auxiliary transmission shifting mechanism further increases the number of selectable gears, allowing for a wider range of selectable operating speeds and meeting various operating conditions.

[0053] like Figure 3As shown, alternatively, the input shaft 1 is connected to a third power output shaft 65; the high / low gear shifting mechanism includes: a second high / low gear shaft 66, a ninth gear shifting mechanism 67, a third high gear drive gear 68, a third high gear driven gear 69, a third low gear drive gear 70, and a third low gear driven gear 71. The auxiliary transmission input shaft 4 is connected to the main transmission output shaft 3 via the ninth gear shifting mechanism 67; the third high gear drive gear 68 is splined on the main transmission output shaft 3, and the third high gear driven gear 69 and the third low gear drive gear 70 are... Gears 70 are respectively mounted on the second high and low gear shafts 66 via splines. The third low gear driven gear 71 is rotatably sleeved on the auxiliary transmission input shaft 4 via needle roller bearings. The third high gear driving gear 68 meshes with the third high gear driven gear 69, and the third low gear driving gear 70 meshes with the third low gear driven gear 71. The auxiliary transmission shifting mechanism includes: the third D gear driving gear 72, the third C gear driving gear 73, the third B gear driving gear 74, the third A gear driving gear 75, the third D gear driven gear 76, and the third C gear driven gear 77. The third B-gear driven gear 78 and the third A-gear driven gear 79 are engaged with the third D-gear drive gear 72 and the third D-gear driven gear 76; the third C-gear drive gear 73 and the third C-gear driven gear 77 are engaged with the third C-gear driven gear 77; the third B-gear drive gear 74 and the third B-gear driven gear 78 are engaged with the third B-gear driven gear 78; and the third A-gear drive gear 75 and the third A-gear driven gear 79 are engaged with the third A-gear driven gear 79. The third A-gear driven gear 79, the third B-gear driven gear 78, the third C-gear driven gear 77, and the third D-gear driven gear 76 are respectively splined onto the small bevel gear. On shaft 5, the third A gear drive gear 75, the third B gear drive gear 74, the third C gear drive gear 73, and the third D gear drive gear 72 are rotatably mounted on the auxiliary transmission input shaft 4 via needle roller bearings; the auxiliary transmission input shaft 4 is equipped with a tenth gear shifting mechanism 80 and an eleventh gear shifting mechanism 81, the tenth gear shifting mechanism 80 being located between the third D gear drive gear 72 and the third C gear drive gear 73, and the eleventh gear shifting mechanism 81 being located between the third B gear drive gear 74 and the third A gear drive gear 75.

[0054] The beneficial effects of adopting the above-mentioned further technical solutions are as follows: As alternatives to the above solutions, multiple solutions allow users to choose different structural types according to their actual needs. For example, if a multi-segment speed range is not required, the number of gears in the auxiliary transmission device can be reduced, eliminating the E-gear drive gear, E-gear driven gear, F-gear drive gear, and F-gear driven gear. In forward mode, the main transmission shifting device has 4 variable gears, the high / low gear shifting device has 2 variable gears, and the auxiliary transmission shifting device has 4 variable gears, resulting in a total of 32 forward gears. In reverse mode, the main transmission shifting device has 1 variable gear, the high / low gear shifting device has 2 variable gears, and the auxiliary transmission shifting device has 4 variable gears, resulting in a total of 8 reverse gears. The engagement of the gear shifting mechanism enables gear switching. The addition of the high / low gear shifting mechanism and the auxiliary transmission shifting mechanism further increases the number of selectable gears, allowing for a wider range of selectable operating speeds and meeting various operating conditions.

[0055] like Figure 4As shown, alternatively, the secondary transmission input shaft 4 is a hollow spline shaft, and a fourth power output shaft 82 is rotatably sleeved in the secondary transmission input shaft 4. The fourth power output shaft 82 is connected to the input shaft 1. The high and low gear shifting mechanism includes: a twelfth gear shifting mechanism 83, a fourth high gear drive gear 84, a fourth high gear driven gear 85, a fourth low gear drive gear 86, and a fourth low gear driven gear 87. The twelfth gear shifting mechanism 83 is splined on the main transmission output shaft 3. The fourth high gear drive gear 84 and the fourth low gear drive gear 86 are both rotatably sleeved by needle roller bearings. On the main transmission output shaft 3, the twelfth gear shifting mechanism 83 is located between the fourth high-gear drive gear 84 and the fourth low-gear drive gear 86. The fourth high-gear driven gear 85 and the fourth low-gear driven gear 87 are both splined on the auxiliary transmission input shaft 4. The fourth high-gear drive gear 84 meshes with the fourth high-gear driven gear 85, and the fourth low-gear drive gear 86 meshes with the fourth low-gear driven gear 87. The auxiliary transmission shifting mechanism includes: the fourth A-gear drive gear 88, the fourth B-gear drive gear 89, the fourth C-gear drive gear 90, and the fourth D-gear drive gear 91. The fourth D gear driven gear 92, fourth C gear driven gear 93, fourth B gear driven gear 94, and fourth A gear driven gear 95; the fourth D gear driving gear 91 meshes with the fourth D gear driven gear 92; the fourth C gear driving gear 90 meshes with the fourth C gear driven gear 93; the fourth B gear driving gear 89 meshes with the fourth B gear driven gear 94; and the fourth A gear driving gear 88 meshes with the fourth A gear driven gear 95. The fourth A gear driving gear 88, fourth B gear driving gear 89, fourth C gear driving gear 90, and fourth D gear driving gear 91 are all connected by a perforated mechanism. The key is installed on the auxiliary transmission input shaft 4; the fourth A gear driven gear 95, the fourth B gear driven gear 94, the fourth C gear driven gear 93, and the fourth D gear driven gear 92 are respectively rotatably sleeved on the small bevel gear shaft 5 via needle roller bearings; the small bevel gear shaft 5 is equipped with a thirteenth gear shifting mechanism 96 and a fourteenth gear shifting mechanism 97, the thirteenth gear shifting mechanism 96 is located between the fourth D gear driven gear 92 and the fourth C gear driven gear 93, and the fourteenth gear shifting mechanism 97 is located between the fourth B gear driven gear 94 and the fourth A gear driven gear 95.

[0056] The beneficial effects of adopting the above-mentioned further technical solutions are: as alternatives to the above solutions, multiple solutions allow users to choose different structural types according to their actual needs. Similarly, the number of gears in the auxiliary transmission device is reduced by eliminating the E-gear drive gear, E-gear driven gear, F-gear drive gear, and F-gear driven gear. In forward mode, this technical route has 4 variable gears in the main transmission shifting device, 2 variable gears in the high / low gear shifting device, and 4 variable gears in the auxiliary transmission shifting device, resulting in a total of 32 forward gears. In reverse mode, the main transmission shifting device has 1 variable gear, the high / low gear shifting device has 2 variable gears, and the auxiliary transmission shifting device has 4 variable gears, resulting in a total of 8 reverse gears. The engagement of the gear shifting mechanism enables gear switching. The high / low gear shifting mechanism and the auxiliary transmission shifting mechanism further increase the selectable gears, allowing for a wider range of selectable operating speeds and meeting various operating conditions.

[0057] like Figures 1 to 3 As shown, the input shaft 1, idler shaft 2, and main transmission output shaft 3 are arranged in a triangular structure; the auxiliary transmission shifting device 4 is arranged in a parallel shaft arrangement, or the input shaft 1, auxiliary transmission input shaft 4, and small bevel gear shaft 5 are arranged in a triangular structure; a small bevel gear 98 is mounted on the small bevel gear shaft 5, and the small bevel gear 98 is connected to a wheel; the input shaft 1 is connected to an engine through a torsional damper.

[0058] The beneficial effects of adopting the above-mentioned further technical solution are: the positional design between shafts facilitates the installation and maintenance of various components, simplifies the structure, and reduces space occupation. It can effectively reduce the axial clearance of the transmission system of this invention, thereby reducing the wheelbase.

[0059] This invention provides a multi-speed transmission system, which can be a transmission system comprising: a drive shaft system and a gear system. The drive shaft system includes an input shaft, an idler shaft, a main transmission output shaft, high and low gear shafts, a secondary transmission input shaft, a small bevel gear shaft, and a power output shaft. The gear system includes a first-gear drive gear, a first-gear driven gear, a reverse drive gear, a second-gear drive gear, a second-gear driven gear, a third-gear drive gear, a third-gear driven gear, a fourth-gear drive gear, a fourth-gear driven gear, a reverse idler gear I (first reverse idler gear), a reverse idler gear II (second reverse idler gear), a reverse driven gear, a high-gear drive gear, a high-gear driven gear, a low-gear drive gear, a low-gear driven gear, an A-gear drive gear, an A-gear driven gear, a B-gear drive gear, a B-gear driven gear, a C-gear drive gear, a C-gear driven gear, a D-gear drive gear, a D-gear driven gear, an E-gear drive gear, an E-gear driven gear, an F-gear drive gear, and an F-gear driven gear.

[0060] In this invention, the main transmission shifting device has an input shaft, idler shaft, and main transmission output shaft arranged in a triangular structure. A wet clutch enables forward / reverse mode switching and forward gear switching. In the main transmission shifting device, the first gear driven gear is loosely mounted on the main transmission output shaft via a bearing and connected to the clutch via a spline; the second gear driving gear is loosely mounted on the input shaft via a bearing and connected to the clutch via a spline; the third gear driven gear is loosely mounted on the main transmission output shaft via a bearing and connected to the clutch via a spline; the fourth gear driving gear is loosely mounted on the input shaft via a bearing and connected to the clutch via a spline; and the reverse idler gear I is loosely mounted on the idler shaft via a bearing and connected to the clutch via a spline. Power to the main transmission shifting device is transmitted from the input shaft. In forward mode, power is transmitted to the main transmission output shaft via the forward clutch; in reverse mode, power is transmitted from the input shaft to the main transmission output shaft via the idler shaft through the reverse clutch.

[0061] The high / low gear shifting device of this invention can be designed with parallel shafts, or the input shaft, high / low gear shafts, and main transmission output shaft can be arranged in a triangular structure. In the high / low gear shifting device, the high gear driving gear is connected to the main transmission output shaft via a spline, the high gear driven gear and the low gear driving gear are connected to the high / low gear shafts via splines, and the low gear driven gear is loosely fitted on the small bevel gear shaft via a needle roller bearing. Gear switching is achieved by engaging a synchronizer (not limited to a synchronizer).

[0062] The auxiliary gear shifting device of this invention can be designed as a parallel shaft, or the input shaft, auxiliary gear input shaft, and small bevel gear shaft can be arranged in a triangular structure. In the auxiliary gear shifting device, the A-gear driven gear, B-gear driven gear, C-gear driven gear, and D-gear driven gear are loosely fitted on the small bevel gear shaft through needle roller bearings. The E-gear driven gear and F-gear driven gear are connected to the small bevel gear shaft through splines. The A-gear driven gear, B-gear driven gear, C-gear driven gear, and D-gear driven gear are connected to the auxiliary gear input shaft through splines. The E-gear driven gear and F-gear driven gear are loosely fitted on the auxiliary gear input shaft through needle roller bearings. Gear shifting is achieved by engaging a synchronizer (not limited to a synchronizer).

[0063] Once the engine starts, power is transmitted through the input shaft, and the transmission route for forward gears is as follows: Forward gear 1 (low-1-A): Power is supplied by engine - torsional damper - input shaft - first gear drive gear - first gear driven gear - clutch (first clutch) - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - A gear drive gear - A gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0064] Forward Gear 2 (Low-1-B): Power is supplied by engine - torsional damper - input shaft - first gear drive gear - first gear driven gear - clutch (first clutch) - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - B gear drive gear - B gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0065] Forward gear 3 (low-1-C): Power is supplied by engine-torsional damper-input shaft-first gear drive gear-first gear driven gear-clutch (first clutch)-main transmission output shaft-high gear drive gear-high gear driven gear-low gear drive gear-low gear driven gear-synchronizer-secondary transmission input shaft-C gear drive gear-C gear driven gear-synchronizer-small bevel gear shaft-small bevel gear-rear wheel.

[0066] Forward gear 4 (low-1-D): Power is supplied by engine-torsional damper-input shaft-first gear drive gear-first gear driven gear-clutch (first clutch)-main transmission output shaft-high gear drive gear-high gear driven gear-low gear drive gear-low gear driven gear-synchronizer-secondary transmission input shaft-D gear drive gear-D gear driven gear-synchronizer-small bevel gear shaft-small bevel gear-rear wheel.

[0067] Forward gear 5 (low-1-E): Power is supplied by engine - torsional damper - input shaft - first gear drive gear - first gear driven gear - clutch (first clutch) - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - synchronizer - E gear drive gear - E gear driven gear - small bevel gear shaft - small bevel gear - rear wheel.

[0068] Forward gear 6 (low-1-F): Power is supplied by engine-torsional damper-input shaft-first gear drive gear-first gear driven gear-clutch (first clutch)-main transmission output shaft-high gear drive gear-high gear driven gear-low gear drive gear-low gear driven gear-synchronizer-secondary transmission input shaft-synchronizer-F gear drive gear-F gear driven gear-small bevel gear shaft-small bevel gear-rear wheel.

[0069] Forward gear 7 (low-2-A): Power is supplied by engine - torsional damper - input shaft - clutch (second clutch) - second gear drive gear - second gear driven gear - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - A gear drive gear - A gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0070] Forward gear 8 (low-2-B): Power is supplied by engine - torsional damper - input shaft - clutch (second clutch) - second gear drive gear - second gear driven gear - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - B gear drive gear - B gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0071] Forward gear 9 (low-2-C): Power is supplied by engine - torsional damper - input shaft - clutch (second clutch) - second gear drive gear - second gear driven gear - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - C gear drive gear - C gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0072] Forward gear 10 (low-2-D): Power is supplied by engine-torsional damper-input shaft-clutch-second gear drive gear-second gear driven gear-main transmission output shaft-high gear drive gear-high gear driven gear-low gear drive gear-low gear driven gear-synchronizer-secondary transmission input shaft-D gear drive gear-D gear driven gear-synchronizer-small bevel gear shaft-small bevel gear-rear wheel.

[0073] Forward gear eleven (low-2-E): Power is supplied by engine - torsional damper - input shaft - clutch (second clutch) - second gear drive gear - second gear driven gear - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - synchronizer - E gear drive gear - E gear driven gear - small bevel gear shaft - small bevel gear - rear wheel.

[0074] Forward gear twelve (low-2-F): Power is supplied by engine - torsional damper - input shaft - clutch (second clutch) - second gear drive gear - second gear driven gear - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - synchronizer - F gear drive gear - F gear driven gear - small bevel gear shaft - small bevel gear - rear wheel.

[0075] Forward gear 13 (Low-3-A): Power is supplied by engine - torsional damper - input shaft - third gear drive gear - third gear driven gear - clutch (third clutch) - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - A gear drive gear - A gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0076] Forward gear 14 (low-3-B): Power is supplied by engine - torsional damper - input shaft - third gear drive gear - third gear driven gear - clutch (third clutch) - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - B gear drive gear - B gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0077] Forward gear 15 (low-3-C): Power is supplied by engine - torsional damper - input shaft - third gear drive gear - third gear driven gear - clutch (third clutch) - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - C gear drive gear - C gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0078] Forward gear sixteen (low-3-D): Power is supplied by engine-torsional damper-input shaft-third gear drive gear-third gear driven gear-clutch-main transmission output shaft-high gear drive gear-high gear driven gear-low gear drive gear-low gear driven gear-synchronizer-secondary transmission input shaft-D gear drive gear-D gear driven gear-synchronizer-small bevel gear shaft-small bevel gear-rear wheel.

[0079] Forward gear 17 (Low-3-E): Power is supplied by engine - torsional damper - input shaft - third gear drive gear - third gear driven gear - clutch (third clutch) - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - synchronizer - E gear drive gear - E gear driven gear - small bevel gear shaft - small bevel gear - rear wheel.

[0080] Forward gear 18 (Low-3-F): Power is supplied by engine - torsional damper - input shaft - third gear drive gear - third gear driven gear - clutch (third clutch) - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - synchronizer - F gear drive gear - F gear driven gear - small bevel gear shaft - small bevel gear - rear wheel.

[0081] Forward gear 19 (low-4-A): Power is supplied by engine - torsional damper - input shaft - clutch (fourth clutch) - fourth gear drive gear - fourth gear driven gear - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - A gear drive gear - A gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0082] Forward gear 20 (low-4-B): Power is supplied by engine - torsional damper - input shaft - clutch (fourth clutch) - fourth gear drive gear - fourth gear driven gear - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - B gear drive gear - B gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0083] Forward Gear 21 (Low-4-C): Power is supplied by engine - torsional damper - input shaft - clutch (fourth clutch) - fourth gear drive gear - fourth gear driven gear - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - C gear drive gear - C gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0084] Forward gear 22 (Low-4-D): Power is supplied by engine - torsional damper - input shaft - clutch (fourth clutch) - fourth gear drive gear - fourth gear driven gear - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - D gear drive gear - D gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0085] Forward gear 23 (Low-4-E): Power is supplied by engine - torsional damper - input shaft - clutch (fourth clutch) - fourth gear drive gear - fourth gear driven gear - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - synchronizer - E gear drive gear - E gear driven gear - small bevel gear shaft - small bevel gear - rear wheel.

[0086] Forward gear 24 (low-4-F): Power is supplied by engine - torsional damper - input shaft - clutch (fourth clutch) - fourth gear drive gear - fourth gear driven gear - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - synchronizer - F gear drive gear - F gear driven gear - small bevel gear shaft - small bevel gear - rear wheel.

[0087] Forward gear 25 (High-1-A): Power is supplied by engine - torsional damper - input shaft - first gear drive gear - first gear driven gear - clutch (first clutch) - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - A gear drive gear - A gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0088] Forward gear 26 (High-1-B): Power is supplied by engine - torsional damper - input shaft - first gear drive gear - first gear driven gear - clutch (first clutch) - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - B gear drive gear - B gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0089] Forward gear 27 (High-1-C): Power is supplied by engine - torsional damper - input shaft - first gear drive gear - first gear driven gear - clutch (first clutch) - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - C gear drive gear - C gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0090] Forward gear 28 (High-1-D): Power is supplied by engine - torsional damper - input shaft - first gear drive gear - first gear driven gear - clutch (first clutch) - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - D gear drive gear - D gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0091] Forward gear 29 (High-1-E): Power is supplied by engine - torsional damper - input shaft - first gear drive gear - first gear driven gear - clutch (first clutch) - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - synchronizer - E gear drive gear - E gear driven gear - small bevel gear shaft - small bevel gear - rear wheel.

[0092] Forward gear 30 (High-1-F): Power is supplied by engine - torsional damper - input shaft - first gear drive gear - first gear driven gear - clutch (first clutch) - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - synchronizer - F gear drive gear - F gear driven gear - small bevel gear shaft - small bevel gear - rear wheel.

[0093] Forward gear 31 (High-2-A): Power is supplied by engine - torsional damper - input shaft - clutch (second clutch) - second gear drive gear - second gear driven gear - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - A gear drive gear - A gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0094] Forward gear 32 (High-2-B): Power is supplied by engine - torsional damper - input shaft - clutch (second clutch) - second gear drive gear - second gear driven gear - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - B gear drive gear - B gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0095] Forward gear 33 (High-2-C): Power is supplied by engine - torsional damper - input shaft - clutch (second clutch) - second gear drive gear - second gear driven gear - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - C gear drive gear - C gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0096] Forward gear 34 (High-2-D): Power is supplied by engine - torsional damper - input shaft - clutch (second clutch) - second gear drive gear - second gear driven gear - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - D gear drive gear - D gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0097] Forward gear 35 (High-2-E): Power is supplied by engine - torsional damper - input shaft - clutch (second clutch) - second gear drive gear - second gear driven gear - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - synchronizer - E gear drive gear - E gear driven gear - small bevel gear shaft - small bevel gear - rear wheel.

[0098] Forward gear 36 (High-2-F): Power is supplied by engine - torsional damper - input shaft - clutch (second clutch) - second gear drive gear - second gear driven gear - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - synchronizer - F gear drive gear - F gear driven gear - small bevel gear shaft - small bevel gear - rear wheel.

[0099] Forward gear 37 (High-3-A): Power is supplied by engine - torsional damper - input shaft - third gear drive gear - third gear driven gear - clutch (third clutch) - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - A gear drive gear - A gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0100] Forward gear 38 (High-3-B): Power is supplied by engine - torsional damper - input shaft - third gear drive gear - third gear driven gear - clutch (third clutch) - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - B gear drive gear - B gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0101] Forward gear 39 (High-3-C): Power is supplied by engine - torsional damper - input shaft - third gear drive gear - third gear driven gear - clutch (third clutch) - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - C gear drive gear - C gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0102] Forward gear 40 (High-3-D): Power is supplied by engine - torsional damper - input shaft - third gear drive gear - third gear driven gear - clutch (third clutch) - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - D gear drive gear - D gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0103] Forward gear 41 (High-3-E): Power is supplied by engine - torsional damper - input shaft - third gear drive gear - third gear driven gear - clutch (third clutch) - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - synchronizer - E gear drive gear - E gear driven gear - small bevel gear shaft - small bevel gear - rear wheel.

[0104] Forward gear 42 (High-3-F): Power is supplied by engine - torsional damper - input shaft - third gear drive gear - third gear driven gear - clutch (third clutch) - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - synchronizer - F gear drive gear - F gear driven gear - small bevel gear shaft - small bevel gear - rear wheel.

[0105] Forward gear 43 (High-4-A): Power is supplied by engine - torsional damper - input shaft - clutch (fourth clutch) - fourth gear drive gear - fourth gear driven gear - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - A gear drive gear - A gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0106] Forward gear 44 (High-4-B): Power is supplied by engine - torsional damper - input shaft - clutch (fourth clutch) - fourth gear drive gear - fourth gear driven gear - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - B gear drive gear - B gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0107] Forward gear 45 (High-4-C): Power is supplied by engine - torsional damper - input shaft - clutch (fourth clutch) - fourth gear drive gear - fourth gear driven gear - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - C gear drive gear - C gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0108] Forward gear 46 (High-4-D): Power is supplied by engine - torsional damper - input shaft - clutch (fourth clutch) - fourth gear drive gear - fourth gear driven gear - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - D gear drive gear - D gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0109] Forward gear 47 (High-4-E): Power is supplied by engine - torsional damper - input shaft - clutch (fourth clutch) - fourth gear drive gear - fourth gear driven gear - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - synchronizer - E gear drive gear - E gear driven gear - small bevel gear shaft - small bevel gear - rear wheel.

[0110] Forward gear 48 (High-4-F): Power is supplied by engine - torsional damper - input shaft - clutch (fourth clutch) - fourth gear drive gear - fourth gear driven gear - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - synchronizer - F gear drive gear - F gear driven gear - small bevel gear shaft - small bevel gear - rear wheel.

[0111] Once the engine starts, power is transmitted through the input shaft. The reverse gear transmission route is as follows: Reverse gear 1 (low-reverse-A): Power is supplied by the engine - torsional damper - input shaft - first gear drive gear - reverse idler gear I - clutch (reverse clutch) - idler gear shaft - reverse idler gear II - reverse driven gear - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - A gear drive gear - A gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0112] Reverse Gear 2 (Low-Reverse-B): Power is supplied by the engine - torsional damper - input shaft - first gear drive gear - reverse idler gear I - clutch (reverse clutch) - idler gear shaft - reverse idler gear II - reverse driven gear - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - B gear drive gear - B gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0113] Reverse gear 3 (low-reverse-C): Power is supplied by engine-torsional damper-input shaft-first gear drive gear-reverse idler gear I-clutch (reverse clutch)-idler shaft-reverse idler gear II-reverse driven gear-main transmission output shaft-high gear drive gear-high gear driven gear-low gear drive gear-low gear driven gear-synchronizer-secondary transmission input shaft-C gear drive gear-C gear driven gear-synchronizer-small bevel gear shaft-small bevel gear-rear wheel.

[0114] Reverse gear 4 (low-reverse-D): Power is supplied by the engine - torsional damper - input shaft - first gear drive gear - reverse idler gear I - clutch (reverse clutch) - idler gear shaft - reverse idler gear II - reverse driven gear - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - D gear drive gear - D gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0115] Reverse Gear 5 (Low-Reverse-E): Power is supplied by the engine - torsional damper - input shaft - first gear drive gear - reverse idler gear I - clutch (reverse clutch) - idler gear shaft - reverse idler gear II - reverse driven gear - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - synchronizer - E gear drive gear - E gear driven gear - small bevel gear shaft - small bevel gear - rear wheel.

[0116] Reverse Gear 6 (Low-Reverse-F): Power is supplied by the engine - torsional damper - input shaft - first gear drive gear - reverse idler gear I - clutch (reverse clutch) - idler gear shaft - reverse idler gear II - reverse driven gear - main transmission output shaft - high gear drive gear - high gear driven gear - low gear drive gear - low gear driven gear - synchronizer - auxiliary transmission input shaft - synchronizer - F gear drive gear - F gear driven gear - small bevel gear shaft - small bevel gear - rear wheel.

[0117] Reverse Gear 7 (High-Reverse-A): Power is supplied by the engine - torsional damper - input shaft - first gear drive gear - reverse idler gear I - clutch (reverse clutch) - idler gear shaft - reverse idler gear II - reverse driven gear - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - A gear drive gear - A gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0118] Reverse Gear 8 (High-Reverse-B): Power is supplied by the engine - torsional damper - input shaft - first gear drive gear - reverse idler gear I - clutch (reverse clutch) - idler gear shaft - reverse idler gear II - reverse driven gear - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - B gear drive gear - B gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0119] Reverse Gear 9 (High-Reverse-C): Power is supplied by the engine - torsional damper - input shaft - first gear drive gear - reverse idler gear I - clutch (reverse clutch) - idler gear shaft - reverse idler gear II - reverse driven gear - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - C gear drive gear - C gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0120] Reverse Gear 10 (High-Reverse-D): Power is supplied by the engine - torsional damper - input shaft - first gear drive gear - reverse idler gear I - clutch (reverse clutch) - idler gear shaft - reverse idler gear II - reverse driven gear - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - D gear drive gear - D gear driven gear - synchronizer - small bevel gear shaft - small bevel gear - rear wheel.

[0121] Reverse Gear 11 (High-Reverse-E): Power is supplied by the engine - torsional damper - input shaft - first gear drive gear - reverse idler gear I - clutch (reverse clutch) - idler gear shaft - reverse idler gear II - reverse driven gear - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - synchronizer - E gear drive gear - E gear driven gear - small bevel gear shaft - small bevel gear - rear wheel.

[0122] Reverse Gear 12 (High-2-F): Power is supplied by engine - torsional damper - input shaft - first gear drive gear - reverse idler gear I - clutch (reverse clutch) - idler gear shaft - reverse idler gear II - reverse driven gear - main transmission output shaft - high gear drive gear - synchronizer - auxiliary transmission input shaft - synchronizer - F gear drive gear - F gear driven gear - small bevel gear shaft - small bevel gear - rear wheel.

[0123] This invention provides a multi-speed transmission system for tractors, specifically a main transmission system with shuttle shifting. The main transmission uses a wet clutch structure, controlled electro-hydraulically. Gear shifting is achieved via a button, eliminating the need for frequent clutch engagement and simplifying the operation. It offers 48 forward gears and 12 reverse gears, providing a wide range of selectable speeds. The clutch cylinder incorporates shift gears, reducing the number of gears, effectively minimizing axial clearance, and reducing wheelbase.

[0124] As an alternative to the above solution: the high-gear drive gear and low-gear drive gear are loosely fitted onto the main transmission output shaft via needle roller bearings. The auxiliary transmission input shaft is replaced with a hollow spline shaft, with the PTO shaft (power output shaft) passing through the center. The high-gear driven gear, low-gear driven gear, A-gear drive gear, B-gear drive gear, C-gear drive gear, D-gear drive gear, E-gear drive gear, and F-gear drive gear are splined onto the auxiliary transmission input shaft. In forward mode, this technical approach has 4 variable gears in the main transmission shifting device, 2 variable gears in the high-low gear shifting device, and 6 variable gears in the auxiliary transmission shifting device, resulting in a total of 48 forward gears. In reverse mode, the main transmission shifting device has 1 variable gear, the high-low gear shifting device has 2 variable gears, and the auxiliary transmission shifting device has 6 variable gears, resulting in a total of 12 reverse gears. This achieves the same effect as the present invention.

[0125] As a second alternative to the above solution: if multi-segment speed regulation range is not required, the number of gears in the auxiliary transmission can be reduced by eliminating the E-gear drive gear, E-gear drive gear, F-gear drive gear, and F-gear drive gear. In forward mode, the main transmission shifting device has 4 variable gears, the high / low gear shifting device has 2 variable gears, and the auxiliary transmission shifting device has 4 variable gears, resulting in a total of 32 forward gears. In reverse mode, the main transmission shifting device has 1 variable gear, the high / low gear shifting device has 2 variable gears, and the auxiliary transmission shifting device has 4 variable gears, resulting in a total of 8 reverse gears. This achieves a variant of the technical approach of this invention.

[0126] As a third alternative to the above solution: Similarly, reduce the number of gears in the auxiliary transmission. Remove the E-gear drive gear, E-gear driven gear, F-gear drive gear, and F-gear driven gear. The high-gear drive gear and low-gear drive gear are loosely fitted onto the main transmission output shaft via needle roller bearings. The auxiliary transmission input shaft is replaced with a hollow spline shaft, with the PTO shaft passing through the center. The high-gear driven gear, low-gear driven gear, A-gear drive gear, B-gear drive gear, C-gear drive gear, and D-gear drive gear are splined onto the auxiliary transmission input shaft. In forward mode, this technical approach has 4 variable gears in the main transmission shifting device, 2 variable gears in the high / low gear shifting device, and 4 variable gears in the auxiliary transmission shifting device, resulting in a total of 32 forward gears. In reverse mode, the main transmission shifting device has 1 variable gear, the high / low gear shifting device has 2 variable gears, and the auxiliary transmission shifting device has 4 variable gears, resulting in a total of 8 reverse gears. This can also achieve a variant of the technical route of the present invention.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-speed transmission system, characterized in that, include: The system comprises an input shaft, an idler shaft, a main transmission output shaft, a secondary transmission input shaft, a small bevel gear shaft, a first-gear drive gear, a first clutch assembly, and a second clutch assembly. The first-gear drive gear and the second clutch assembly are both mounted on the input shaft. The first-gear drive gear is coupled to both the idler shaft and the main transmission output shaft. The first clutch assembly is mounted on the main transmission output shaft, and the idler shaft is coupled to the main transmission output shaft. Gears are mounted on both the first and second clutch assemblies. The gear on the first clutch assembly is coupled to the input shaft, and the gear on the second clutch assembly is coupled to the main transmission output shaft. The secondary transmission input shaft is coupled to both the main transmission output shaft and the small bevel gear shaft.

2. The multi-speed transmission system according to claim 1, characterized in that, The first clutch assembly includes a first clutch, a third clutch, and a first clutch cylinder. Both the first clutch and the third clutch are mounted in the first clutch cylinder and are mounted on the main transmission output shaft. The second clutch assembly includes a second clutch, a fourth clutch, and a second clutch cylinder. Both the second clutch and the fourth clutch are mounted in the second clutch cylinder and are mounted on the input shaft. A second-speed driven gear is mounted on the first clutch cylinder, and a third-speed driving gear is mounted on the second clutch cylinder. The second-speed driven gear is clutch-driven connected to the input shaft, and the third-speed driving gear is clutch-driven connected to the main transmission output shaft.

3. The multi-speed transmission system according to claim 2, characterized in that, The input shaft is equipped with a second-speed drive gear and a fourth-speed drive gear; the idler shaft is equipped with a first reverse idler gear, a reverse clutch, and a second reverse idler gear; the main transmission output shaft is equipped with a first-speed driven gear, a third-speed driven gear, a fourth-speed driven gear, and a reverse driven gear; the first-speed drive gear meshes with the first reverse idler gear and the first-speed driven gear, the second-speed drive gear meshes with the second-speed driven gear, the third-speed drive gear meshes with the third-speed driven gear, the fourth-speed drive gear meshes with the fourth-speed driven gear, and the second reverse idler gear meshes with the reverse driven gear.

4. The multi-speed transmission system according to claim 3, characterized in that, The first clutch, second clutch, third clutch, fourth clutch, and reverse clutch are all wet clutches; the first clutch, second clutch, third clutch, fourth clutch, and reverse clutch are all connected to an electro-hydraulic control system; the first gear driven gear is rotatably mounted on the main transmission output shaft via a bearing, and is connected to the first clutch via a spline; the second gear driven gear is rotatably mounted on the input shaft via a bearing, and is connected to the second clutch via a spline; the third gear driven gear is rotatably mounted on the main transmission output shaft via a bearing, and is connected to the third clutch via a spline; the fourth gear driven gear is rotatably mounted on the input shaft via a bearing, and is connected to the fourth clutch via a spline; the first reverse idler gear is rotatably mounted on the idler gear shaft via a bearing, and is connected to the reverse clutch via a spline.

5. A multi-speed transmission system according to claim 1, characterized in that, The main transmission output shaft is connected to the auxiliary transmission input shaft via a high / low gear shifting mechanism; the auxiliary transmission input shaft is connected to the small bevel gear shaft via an auxiliary transmission shifting mechanism.

6. A multi-speed transmission system according to claim 5, characterized in that, The input shaft is connected to a first power output shaft; The high / low gear shifting mechanism includes: a first high / low gear dual shaft, a first gear shifting mechanism, a first high-gear drive gear, a first high-gear driven gear, a first low-gear drive gear, and a first low-gear driven gear. The auxiliary transmission input shaft is connected to the main transmission output shaft via the first gear shifting mechanism. The first high-gear drive gear is splined on the main transmission output shaft. The first high-gear driven gear and the first low-gear drive gear are respectively splined on the first high / low gear dual shaft. The first low-gear driven gear is rotatably sleeved on the auxiliary transmission input shaft via a needle roller bearing. The first high-gear drive gear and the first high-gear driven gear... The gears mesh, with the first low-gear drive gear meshing with the first low-gear driven gear; the auxiliary gear shifting mechanism includes: a first F-gear drive gear, a first E-gear drive gear, a first D-gear drive gear, a first C-gear drive gear, a first B-gear drive gear, a first A-gear drive gear, a first F-gear driven gear, a first E-gear driven gear, a first D-gear driven gear, a first C-gear driven gear, a first B-gear driven gear, and a first A-gear driven gear. The first F-gear drive gear meshes with the first F-gear driven gear, the first E-gear drive gear meshes with the first E-gear driven gear, and the first D-gear drive gear meshes with the first D-gear driven gear. The first C-gear drive gear meshes with the first C-gear driven gear, the first B-gear drive gear meshes with the first B-gear driven gear, and the first A-gear drive gear meshes with the first A-gear driven gear; the first A-gear driven gear, the first B-gear driven gear, the first C-gear driven gear, and the first D-gear driven gear are rotatably mounted on the small bevel gear shaft via needle roller bearings; the first E-gear driven gear and the first F-gear driven gear are splined onto the small bevel gear shaft; the first A-gear drive gear, the first B-gear drive gear, the first C-gear drive gear, and the first D-gear drive gear... The first E-gear drive gear and the first F-gear drive gear are rotatably mounted on the secondary transmission input shaft via a spline; a second gear shifting mechanism is installed on the secondary transmission input shaft, located between the first F-gear drive gear and the first E-gear drive gear; a third gear shifting mechanism and a fourth gear shifting mechanism are installed on the small bevel gear shaft, the third gear shifting mechanism being located between the first D-gear drive gear and the first C-gear drive gear, and the fourth gear shifting mechanism being located between the first B-gear drive gear and the first A-gear drive gear.

7. A multi-speed transmission system according to claim 5, characterized in that, The secondary transmission input shaft is a hollow spline shaft, and a second power output shaft is rotatably sleeved in the secondary transmission input shaft, and the second power output shaft is connected to the input shaft. The high / low gear shifting mechanism includes: a fifth gear shifting mechanism, a second high-gear drive gear, a second high-gear driven gear, a second low-gear drive gear, and a second low-gear driven gear. The fifth gear shifting mechanism, the second high-gear drive gear, and the second low-gear drive gear are all rotatably mounted on the main transmission output shaft via needle roller bearings. The fifth gear shifting mechanism is located between the second high-gear drive gear and the second low-gear drive gear. The second high-gear driven gear and the second low-gear driven gear are both splined onto the auxiliary transmission input shaft. The second high-gear drive gear meshes with the second high-gear driven gear. The second low-gear drive gear meshes with the second low-gear driven gear; the auxiliary gear shifting mechanism includes: a second A-gear drive gear, a second B-gear drive gear, a second C-gear drive gear, a second D-gear drive gear, a second E-gear drive gear, a second F-gear drive gear, a second F-gear driven gear, a second E-gear driven gear, a second D-gear driven gear, a second C-gear driven gear, a second B-gear driven gear, and a second A-gear driven gear. The second F-gear drive gear meshes with the second F-gear driven gear, the second E-gear drive gear meshes with the second E-gear driven gear, and the second D-gear drive gear meshes with the second D-gear driven gear. The second C-gear drive gear meshes with the second C-gear driven gear; the second B-gear drive gear meshes with the second B-gear driven gear; the second A-gear drive gear meshes with the second A-gear driven gear; the second A-gear drive gear, the second B-gear drive gear, the second C-gear drive gear, and the second D-gear drive gear are splined on the auxiliary transmission input shaft; the second E-gear drive gear and the second F-gear drive gear are rotatably mounted on the auxiliary transmission input shaft via needle roller bearings; the second A-gear driven gear, the second B-gear driven gear, the second C-gear driven gear, and the second D-gear driven gear are... A needle roller bearing is rotatably mounted on the small bevel gear shaft; the second E-gear driven gear and the second F-gear driven gear are mounted on the small bevel gear shaft via splines; a sixth gear shifting mechanism is mounted on the auxiliary transmission input shaft, the sixth gear shifting mechanism being located between the second F-gear driving gear and the second E-gear driving gear; a seventh gear shifting mechanism and an eighth gear shifting mechanism are mounted on the small bevel gear shaft, the seventh gear shifting mechanism being located between the second D-gear driven gear and the second C-gear driven gear, and the eighth gear shifting mechanism being located between the second B-gear driven gear and the second A-gear driven gear.

8. A multi-speed transmission system according to claim 7, characterized in that, The input shaft is connected to a third power output shaft; the high / low gear shifting mechanism includes: a second high / low gear shaft, a ninth gear shifting mechanism, a third high-gear drive gear, a third high-gear driven gear, a third low-gear drive gear, and a third low-gear driven gear. The auxiliary transmission input shaft is connected to the main transmission output shaft via the ninth gear shifting mechanism. The third high-gear drive gear is splined on the main transmission output shaft. The third high-gear driven gear and the third low-gear drive gear are splined on the second high / low gear shaft, and the third low-gear driven gear is rotatably mounted on the auxiliary transmission input shaft via a needle roller bearing. The third high-gear drive gear meshes with the third high-gear driven gear, and the third low-gear drive gear meshes with the third low-gear driven gear. The auxiliary transmission shifting mechanism includes: a third D-gear drive gear, a third C-gear drive gear, a third B-gear drive gear, a third A-gear drive gear, a third D-gear driven gear, a third C-gear driven gear, a third B-gear driven gear, and a third D-gear driven gear. The third A-gear driven gear meshes with the third D-gear driven gear, the third C-gear driven gear meshes with the third C-gear driven gear, the third B-gear driven gear meshes with the third B-gear driven gear, and the third A-gear driven gear meshes with the third A-gear driven gear. The third A-gear, third B-gear, third C-gear, and third D-gear driven gears are respectively splined onto the small bevel gear shaft. The third A-gear, third B-gear, third C-gear, and third D-gear driven gears are respectively rotatably mounted on the auxiliary transmission input shaft via needle roller bearings. A tenth gear shifting mechanism and an eleventh gear shifting mechanism are mounted on the auxiliary transmission input shaft. The tenth gear shifting mechanism is located between the third D-gear and the third C-gear driven gear, and the eleventh gear shifting mechanism is located between the third B-gear and the third A-gear driven gear.

9. A multi-speed transmission system according to claim 5, characterized in that, The secondary transmission input shaft is a hollow spline shaft, and a fourth power output shaft is rotatably sleeved in the secondary transmission input shaft, and the fourth power output shaft is connected to the input shaft; The high / low gear shifting mechanism includes: a twelfth gear shifting mechanism, a fourth high-gear drive gear, a fourth high-gear driven gear, a fourth low-gear drive gear, and a fourth low-gear driven gear. The twelfth gear shifting mechanism is splined on the main transmission output shaft. The fourth high-gear drive gear and the fourth low-gear drive gear are rotatably mounted on the main transmission output shaft via needle roller bearings. The twelfth gear shifting mechanism is located between the fourth high-gear drive gear and the fourth low-gear drive gear. The fourth high-gear driven gear and the fourth low-gear driven gear are splined on the auxiliary transmission input shaft. The fourth high-gear drive gear meshes with the fourth high-gear driven gear, and the fourth low-gear drive gear meshes with the fourth low-gear driven gear. The auxiliary transmission shifting mechanism includes: a fourth A-gear drive gear, a fourth B-gear drive gear, a fourth C-gear drive gear, a fourth D-gear drive gear, a fourth D-gear driven gear, a fourth C-gear driven gear, a fourth B-gear driven gear, and a fourth A-gear driven gear. The fourth D gear driving gear meshes with the fourth D gear driven gear, the fourth C gear driving gear meshes with the fourth C gear driven gear, the fourth B gear driving gear meshes with the fourth B gear driven gear, and the fourth A gear driving gear meshes with the fourth A gear driven gear. The fourth A gear driving gear, the fourth B gear driving gear, the fourth C gear driving gear, and the fourth D gear driving gear are all splined on the auxiliary transmission input shaft. The fourth A gear driven gear, the fourth B gear driven gear, the fourth C gear driven gear, and the fourth D gear driven gear are rotatably mounted on the small bevel gear shaft via needle roller bearings. A thirteenth gear shifting mechanism and a fourteenth gear shifting mechanism are mounted on the small bevel gear shaft. The thirteenth gear shifting mechanism is located between the fourth D gear driven gear and the fourth C gear driven gear, and the fourteenth gear shifting mechanism is located between the fourth B gear driven gear and the fourth A gear driven gear.

10. A multi-speed transmission system according to claim 1, characterized in that, The input shaft, the idler shaft, and the main transmission output shaft are arranged in a triangular structure; the auxiliary transmission shifting device is arranged in a parallel shaft arrangement, or the input shaft, the auxiliary transmission input shaft, and the small bevel gear shaft are arranged in a triangular structure; a small bevel gear is mounted on the small bevel gear shaft, and the small bevel gear is connected to a wheel; the input shaft is connected to an engine through a torsional damper.

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