Tractor power high-low reverse gear system and tractor

Abstract

The invention relates to a tractor power high-low reverse gear system and a tractor, in particular to a tractor power high-low reverse gear system. Comprising an input shaft, a low-gear and high-gear primary driving gear coaxially and fixedly connected to the middle end of the input shaft, a high-gear and low-gear clutch coaxially and fixedly connected to the output end of the input shaft and a first-shaft output shaft coaxially arranged with the input shaft, and the input end of the first-shaft output shaft is used for being connected with the high-gear and low-gear clutch; the transmission device further comprises a second-shaft output shaft, the input end of the second-shaft output shaft is coaxially and fixedly connected with a low-gear and high-gear first-stage driven gear, the first-shaft output shaft and the second-shaft output shaft are connected with a second-stage transmission assembly and a reverse-gear transmission assembly, and the first-shaft output shaft or the second-shaft output shaft is coaxially and fixedly connected with a clutch assembly. The clutch assembly is used for being connected with the two-stage transmission assembly and the reverse gear transmission assembly at the same time. By the adoption of the technical scheme, the technical problems that in an existing power gear shifting route, a gear transmission route is too long, transmission efficiency is lost, and effective power generation of an engine is affected can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission, and particularly to a tractor power high-low reverse gear system and a tractor. Background Art

[0002] Power shift tractors can improve agricultural production efficiency and reduce labor costs and time. Currently, the power shift routes in the range include power reversing and power high-low gears. The power reversing and power high-low gears are generally input from one shaft (engine shaft) and output to the main transmission through a second shaft. Wet clutches are randomly arranged on the first shaft and / or the second shaft, and the multiple shafts are driven by gears. The power is lost due to excessive gear transmissions, which is not conducive to the effective power generation of the engine. Summary of the Invention

[0003] In view of the technical problems in the existing power shift routes, such as the too long gear transmission route, excessive gear transmissions resulting in loss of transmission efficiency, and affecting the effective power generation of the engine, the present invention provides a tractor power high-low reverse gear system and a tractor.

[0004] The technical solution for the present invention to solve the above technical problems is as follows:

[0005] The present invention provides a tractor power high-low reverse gear system, including an input shaft, a low-high gear first-stage driving gear coaxially and fixedly connected to the middle end of the input shaft, a high-low gear clutch coaxially and fixedly connected to the output end of the input shaft, and a first shaft output shaft coaxially arranged with the input shaft. The input end of the first shaft output shaft is used to engage the high-low gear clutch; it further includes a second shaft output shaft parallel to the input shaft. The input end of the second shaft output shaft is coaxially and fixedly connected with a low-high gear first-stage driven gear meshing with the low-high gear first-stage driving gear. The first shaft output shaft and the second shaft output shaft are connected with a second-stage transmission assembly and a reverse gear transmission assembly, and a clutch assembly is coaxially and fixedly connected to the first shaft output shaft or the second shaft output shaft. The clutch assembly is used to simultaneously engage with the second-stage transmission assembly and the reverse gear transmission assembly.

[0006] The beneficial effects of the present invention are as follows: The functions of power high gear forward gear, power low gear forward gear, and power reverse gear can be realized, and the power consumption can be reduced. For example, when realizing the power high gear forward gear, by setting the high-low gear clutch that is simultaneously connected to the input shaft and the first shaft output shaft, the power of the engine can be input through the input shaft, and after the engagement of the high-low gear clutch, it can be directly output through the first shaft output shaft without consuming power through gears. In this way, at least one forward gear has low power loss, which is more conducive to the effective power generation of the engine, so as to improve the technical problems in the existing power shift routes, such as the too long gear transmission route, excessive gear transmissions resulting in loss of transmission efficiency, and affecting the effective power generation of the engine.

[0007] On the basis of the above technical solutions, the present invention can be further improved as follows.

[0008] Further, the clutch assembly is coaxially and fixedly connected to the second shaft output shaft, a part of the second-stage transmission assembly and the reverse gear transmission assembly rotates coaxially and is slidably connected to the second shaft output shaft, and the other part is coaxially and fixedly connected to the first shaft output shaft.

[0009] The beneficial effect of adopting the above further solution is: when realizing the power low-speed forward gear, the power is input from the input shaft and transmitted to the low-high gear first-stage passive gear through the low-high gear first-stage active gear. Under the connection of the second shaft output shaft, when the second-stage transmission assembly and the clutch assembly are engaged, the power is transmitted to the second-stage transmission assembly and then to the first shaft output shaft, and the power is output from the first shaft output shaft; when realizing the power reverse gear function, the power is input from the input shaft and transmitted to the low-high gear first-stage passive gear through the low-high gear first-stage active gear. Under the connection of the second shaft output shaft, when the reverse gear transmission assembly and the clutch assembly are engaged, the power is transmitted to the reverse gear transmission assembly and then to the first shaft output shaft, and the power is output from the first shaft output shaft.

[0010] Further, the clutch assembly is coaxially and fixedly connected to the first shaft output shaft, a part of the second-stage transmission assembly and the reverse gear transmission assembly rotates coaxially and is slidably connected to the first shaft output shaft, and the other part is coaxially and fixedly connected to the second shaft output shaft.

[0011] The beneficial effect of adopting the above further solution is: when realizing the power low-speed forward gear, the power is input from the input shaft and transmitted to the low-high gear first-stage passive gear through the low-high gear first-stage active gear. Under the connection of the second shaft output shaft, when the second-stage transmission assembly and the clutch assembly are engaged, the power is transmitted to the second-stage transmission assembly and then to the clutch assembly, and the power is output from the first shaft output shaft; when realizing the power reverse gear function, the power is input from the input shaft and transmitted to the low-high gear first-stage passive gear through the low-high gear first-stage active gear. Under the connection of the second shaft output shaft, when the reverse gear transmission assembly and the clutch assembly are engaged, the power is transmitted to the reverse gear transmission assembly and then to the clutch assembly, and the power is output from the first shaft output shaft.

[0012] Further, the secondary transmission assembly includes a low-high gear secondary driving gear and a low-high gear secondary driven gear that mesh with each other; when the clutch assembly is coaxially and fixedly connected to the second shaft output shaft, the clutch assembly is used to engage the low-high gear secondary driving gear, the low-high gear secondary driving gear slides and is coaxially rotatably connected to the second shaft output shaft, and the low-high gear secondary driven gear is coaxially and fixedly connected to the first shaft output shaft; when the clutch assembly is coaxially and fixedly connected to the first shaft output shaft, the clutch assembly is used to engage the low-high gear secondary driven gear, the low-high gear secondary driven gear slides and is coaxially rotatably connected to the first shaft output shaft, and the low-high gear secondary driving gear is coaxially and fixedly connected to the second shaft output shaft.

[0013] The beneficial effects of adopting the above further scheme are as follows: when realizing the power low gear forward gear function, when the clutch assembly is coaxially and fixedly connected to the second shaft output shaft, power is input from the input shaft, transmitted by the low-high gear primary driving gear to the low-high gear primary driven gear, and under the connection of the second shaft output shaft, the power is transmitted from the second shaft output shaft to the clutch assembly, then transmitted to the low-high gear secondary driving gear engaged with the clutch assembly, and through the meshing of the low-high gear secondary driven gear, the power is transmitted to the first shaft output shaft and output from the first shaft output shaft; when the clutch assembly is coaxially and fixedly connected to the first shaft output shaft, power is input from the input shaft, transmitted by the low-high gear primary driving gear to the low-high gear primary driven gear, and under the connection of the second shaft output shaft, the power is transmitted from the second shaft output shaft to the low-high gear secondary driving gear, and through the meshing of the low-high gear secondary driven gear, the power is transmitted to the clutch assembly engaged with the low-high gear secondary driven gear, then transmitted to the first shaft output shaft, and output from the first shaft output shaft.

[0014] Further, the reverse gear transmission assembly includes a reverse gear driving gear, an idler gear meshing with the reverse gear driving gear, and a reverse gear driven gear meshing with the idler gear; when the clutch assembly is coaxially and fixedly connected to the second shaft output shaft, the clutch assembly is used to engage the reverse gear driving gear, the reverse gear driving gear slides and is coaxially rotatably connected to the second shaft output shaft, and the reverse gear driven gear is coaxially and fixedly connected to the first shaft output shaft; when the clutch assembly is coaxially and fixedly connected to the first shaft output shaft, the clutch assembly is used to engage the reverse gear driven gear, the reverse gear driven gear slides and is coaxially rotatably connected to the first shaft output shaft, and the reverse gear driving gear is coaxially and fixedly connected to the second shaft output shaft.

[0015] The beneficial effects of adopting the above further solution are as follows: When implementing the power reverse gear function, when the clutch assembly is coaxially and fixedly connected to the second shaft output shaft, power is input from the input shaft and transmitted to the low / high gear first-stage driven gear through the low / high gear first-stage driving gear. Under the connection of the second shaft output shaft, power is transmitted from the second shaft output shaft to the clutch assembly, and then transmitted to the reverse gear driving gear engaged with the clutch assembly. Under the transmission of the idle gear and the reverse gear driven gear, power is transmitted to the first shaft output shaft and output from the first shaft output shaft; when the clutch assembly is coaxially and fixedly connected to the first shaft output shaft, power is input from the input shaft and transmitted to the low / high gear first-stage driven gear through the low / high gear first-stage driving gear. Under the connection of the second shaft output shaft, power is transmitted from the second shaft output shaft to the reverse gear driving gear, and then transmitted to the idle gear and the reverse gear driven gear. After that, power is transmitted to the clutch assembly engaged with the reverse gear driven gear, and finally transmitted to the first shaft output shaft and output from the first shaft output shaft.

[0016] Further, the clutch assembly includes a low / high gear clutch and a reverse gear clutch arranged coaxially. The low / high gear clutch and the reverse gear clutch are simultaneously coaxially and fixedly connected to the first shaft output shaft or the second shaft output shaft. The low / high gear clutch is used to engage with the second-stage transmission assembly, and the reverse gear clutch is used to engage with the reverse gear transmission assembly.

[0017] The beneficial effects of adopting the above further solution are as follows: When implementing the power low gear forward gear function, the low / high gear clutch engages with the second-stage transmission assembly to transmit power to the first shaft output shaft and output it, realizing power low gear forward; when implementing the power reverse gear function, the reverse gear clutch engages with the reverse gear transmission assembly to transmit power to the first shaft output shaft and output it, realizing power reverse.

[0018] Further, it further includes an input shaft support bearing, a first shaft output shaft support bearing left, and a first shaft output shaft support bearing right. The inner ring of the input shaft support bearing is coaxially and fixedly connected to the input shaft. The inner ring of the first shaft output shaft support bearing left is coaxially and fixedly connected to the output end of the input shaft, and the outer ring is coaxially and fixedly connected to the inner side of the input end of the first shaft output shaft. The inner ring of the first shaft output shaft support bearing right is coaxially and fixedly connected to the output end of the first shaft output shaft.

[0019] The beneficial effects of adopting the above further solution are as follows: The input shaft is supported by the input shaft support bearing, and the input shaft and the first shaft output shaft are kept coaxial through the connection of the first shaft output shaft support bearing left. At the same time, the first shaft output shaft is kept stable under the support of the first shaft output shaft support bearing left and the first shaft output shaft support bearing right.

[0020] Further, it further includes a two-axis front bearing and a two-axis rear bearing; the inner ring of the two-axis front bearing is coaxially and fixedly connected to the input end of the two-axis output shaft, and the inner ring of the two-axis rear bearing is coaxially and fixedly connected to the output end of the two-axis output shaft.

[0021] The beneficial effect of adopting the above further solution is that the two-axis output shaft can be stably supported by the two-axis front bearing and the two-axis rear bearing.

[0022] Further, it further includes a low-high gear second-stage gear support bearing and a reverse gear support bearing. The inner rings of the low-high gear second-stage gear support bearing and the reverse gear support bearing are both coaxially and fixedly connected to the two-axis output shaft or the one-axis output shaft. The outer ring of the low-high gear second-stage gear support bearing is coaxially and fixedly connected to the second-stage transmission assembly, and the outer ring of the reverse gear support bearing is coaxially and fixedly connected to the reverse gear transmission assembly.

[0023] The beneficial effect of adopting the above further solution is that the second-stage transmission assembly can be supported by the low-high gear second-stage gear support bearing, and the reverse gear transmission assembly can be supported by the reverse gear support bearing, ensuring the installation stability of the second-stage transmission assembly and the reverse gear transmission assembly when the clutch assembly is combined with the second-stage transmission assembly and the reverse gear transmission assembly respectively.

[0024] The present invention also provides a tractor, including the tractor power high-low-reverse system described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is the overall route diagram of the first solution of the tractor power high-low-reverse system of the present invention;

[0026] Figure 2 It is one of the partial route diagrams of the first solution of the tractor power high-low-reverse system of the present invention, mainly showing the power high-gear forward gear function route through thick solid lines;

[0027] Figure 3 It is the second partial route diagram of the first solution of the tractor power high-low-reverse system of the present invention, mainly showing the power low-gear forward gear function route through thick solid lines;

[0028] Figure 4 It is one of the partial route diagrams of the first solution of the tractor power high-low-reverse system of the present invention, mainly showing the power reverse gear function route through thick solid lines;

[0029] Figure 5 It is the overall route diagram of the second solution of the tractor power high-low-reverse system of the present invention;

[0030] Figure 6This is one of the sub-diagrams of the route map for the second solution of the tractor power high-low reverse gear system of the present invention, mainly showing the power high-gear forward gear function route through thick solid lines;

[0031] Figure 7 This is the second sub-diagram of the route map for the second solution of the tractor power high-low reverse gear system of the present invention, mainly showing the power low-gear forward gear function route through thick solid lines;

[0032] Figure 8 This is one of the sub-diagrams of the route map for the second solution of the tractor power high-low reverse gear system of the present invention, mainly showing the power reverse gear function route through thick solid lines.

[0033] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0034] 1. Input shaft; 2. Input shaft support bearing; 3. High-low gear first-stage driving gear; 4. High-low gear clutch; 5. High-low gear second-stage driven gear; 6. Left one-axis output shaft support bearing; 7. Idler shaft bearing; 8. Idler gear; 9. Right one-axis output shaft support bearing; 10. Second-axis front bearing; 11. High-low gear first-stage driven gear; 12. High-low gear second-stage gear support bearing; 13. High-low gear second-stage driving gear; 14. High-low gear clutch; 15. Reverse gear clutch; 16. Reverse gear driving gear; 17. Reverse gear support bearing; 18. Second-axis rear bearing; 19. Second-axis output shaft; 20. One-axis output shaft; 21. Reverse gear driven gear. Detailed implementation mode

[0035] The principles and features of the present invention will be described below. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0036] Example 1

[0037] As Figures 1 to 8 , Figures 1 - 4 is the attached drawing corresponding to Solution 1, showing the state where the clutch assembly is coaxially and fixedly connected to the second-axis output shaft 19. Among them, Figure 2 the thick solid line is used to show the state of realizing the power high-gear forward gear function, Figure 3 the thick solid line is used to show the state of realizing the power low-gear forward gear function, Figure 4 the thick solid line is used to show the state of realizing the power reverse gear function.

[0038] Figures 5 - 8 is the attached drawing corresponding to Solution 2, showing the state where the clutch assembly is coaxially and fixedly connected to the one-axis output shaft 20. Among them, Figure 6 the thick solid line is used to show the state of realizing the power high-gear forward gear function, [[ID=4२]] Figure 7 the thick solid line is used to show the state of realizing the power low-gear forward gear function, Figure 8The medium thick solid line is used to show the state of realizing the power reverse gear function.

[0039] The present invention provides a tractor power high-low reverse gear system, which includes an input shaft 1, a low-high gear first-stage driving gear 3 coaxially and fixedly connected to the middle end of the input shaft 1, a high-low gear clutch 4 coaxially and fixedly connected to the output end of the input shaft 1, and a first-axis output shaft 20 coaxially arranged with the input shaft 1. The input end of the first-axis output shaft 20 is used to engage the high-low gear clutch 4; it also includes a second-axis output shaft 19 parallel to the input shaft 1. A low-high gear first-stage driven gear 11 meshing with the low-high gear first-stage driving gear 3 is coaxially and fixedly connected to the input end of the second-axis output shaft 19. The first-axis output shaft 20 and the second-axis output shaft 19 are connected with a second-stage transmission assembly and a reverse gear transmission assembly, and a clutch assembly is coaxially and fixedly connected to the first-axis output shaft 20 or the second-axis output shaft 19. The clutch assembly is used to simultaneously engage with the second-stage transmission assembly and the reverse gear transmission assembly.

[0040] The beneficial effects of this embodiment are: the power high gear forward gear, the power low gear forward gear and the power reverse gear functions can be realized, and the power consumption can be reduced. For example, when realizing the power high gear forward gear (such as Figure 2 and Figure 6 ), by setting the high-low gear clutch 4 that is simultaneously connected to the input shaft 1 and the first-axis output shaft 20, the power of the engine can be input through the input shaft 1, and then directly output through the first-axis output shaft 20 after the engagement of the high-low gear clutch 4, without consuming power through gears. In this way, at least one forward gear has low power loss, which is more conducive to the effective power generation of the engine, so as to improve the technical problems in the existing power shift route that the gear transmission route is too long, there are too many gear transmissions, resulting in loss of transmission efficiency and affecting the effective power generation of the engine.

[0041] In the power low gear forward gear function, the power is input from the input shaft 1 and transmitted from the low-high gear first-stage driving gear 3 to the low-high gear first-stage driven gear 11. Under the connection of the second-axis output shaft 19, when the second-stage transmission assembly and the clutch assembly are engaged, the power is transmitted to the second-stage transmission assembly, and then transmitted to the first-axis output shaft 20, and the power is output from the first-axis output shaft 20;

[0042] In the realization of the power reverse gear function, the power is input from the input shaft 1 and transmitted from the low-high gear first-stage driving gear 3 to the low-high gear first-stage driven gear 11. Under the connection of the second-axis output shaft 19, when the reverse gear transmission assembly and the clutch assembly are engaged, the power is transmitted to the reverse gear transmission assembly, and then transmitted to the first-axis output shaft 20, and the power is output from the first-axis output shaft 20.

[0043] Embodiment 2

[0044] Such as Figures 1 to 4, on the basis of Embodiment 1, the clutch assembly is coaxially and fixedly connected to the second-axis output shaft 19, a part of the secondary transmission assembly and the reverse-gear transmission assembly rotates coaxially and is slidably connected to the second-axis output shaft 19, and the other part is coaxially and fixedly connected to the first-axis output shaft 20.

[0045] The beneficial effect of adopting the preferred solution in the above embodiment is that when realizing the power low forward gear, the power is input from the input shaft 1 and transmitted by the low-high gear first-stage driving gear 3 to the low-high gear first-stage driven gear 11. Under the connection of the second-axis output shaft 19, when the secondary transmission assembly and the clutch assembly are engaged, the power is transmitted to the secondary transmission assembly and then to the first-axis output shaft 20, and the power is output from the first-axis output shaft 20;

[0046] When realizing the power reverse gear function, the power is input from the input shaft 1 and transmitted by the low-high gear first-stage driving gear 3 to the low-high gear first-stage driven gear 11. Under the connection of the second-axis output shaft 19, when the reverse-gear transmission assembly and the clutch assembly are engaged, the power is transmitted to the reverse-gear transmission assembly and then to the first-axis output shaft 20, and the power is output from the first-axis output shaft 20.

[0047] Embodiment 3

[0048] As Figures 5 to 8 , on the basis of Embodiments 1 and 2, the clutch assembly is coaxially and fixedly connected to the first-axis output shaft 20, a part of the secondary transmission assembly and the reverse-gear transmission assembly rotates coaxially and is slidably connected to the first-axis output shaft 20, and the other part is coaxially and fixedly connected to the second-axis output shaft 19.

[0049] The beneficial effect of adopting the preferred solution in the above embodiment is that when realizing the power low forward gear, the power is input from the input shaft 1 and transmitted by the low-high gear first-stage driving gear 3 to the low-high gear first-stage driven gear 11. Under the connection of the second-axis output shaft 19, when the secondary transmission assembly and the clutch assembly are engaged, the power is transmitted to the secondary transmission assembly and then to the clutch assembly, and the power is output from the first-axis output shaft 20;

[0050] When realizing the power reverse gear function, the power is input from the input shaft 1 and transmitted by the low-high gear first-stage driving gear 3 to the low-high gear first-stage driven gear 11. Under the connection of the second-axis output shaft 19, when the reverse-gear transmission assembly and the clutch assembly are engaged, the power is transmitted to the reverse-gear transmission assembly and then to the clutch assembly, and the power is output from the first-axis output shaft 20.

[0051] Embodiment 4

[0052] As Figures 1 to 8 , on the basis of Embodiments 1-3, the secondary transmission assembly includes a low-high gear second-stage driving gear 13 and a low-high gear second-stage driven gear 5 that mesh with each other; when the clutch assembly is coaxially and fixedly connected to the second-axis output shaft 19 (asFigures 1 to 4 ), the clutch assembly is used to engage the low-high speed second-stage driving gear 13. The low-high speed second-stage driving gear 13 slides and is coaxially rotatably connected to the second shaft output shaft 19, and the low-high speed second-stage driven gear 5 is coaxially fixedly connected to the first shaft output shaft 20; when the clutch assembly is coaxially fixedly connected to the first shaft output shaft 20 (as Figures 5 to 8 ), the clutch assembly is used to engage the low-high speed second-stage driven gear 5. The low-high speed second-stage driven gear 5 slides and is coaxially rotatably connected to the first shaft output shaft 20, and the low-high speed second-stage driving gear 13 is coaxially fixedly connected to the second shaft output shaft 19.

[0053] The beneficial effect of adopting the preferred solution in the above embodiment is that when realizing the power low-speed forward gear function, when the clutch assembly is coaxially fixedly connected to the second shaft output shaft 19 (as Figure 3 ), power is input from the input shaft 1 and transmitted to the low-high speed first-stage driven gear 11 through the low-high speed first-stage driving gear 3. Under the connection of the second shaft output shaft 19, power is transmitted from the second shaft output shaft 19 to the clutch assembly, and then transmitted to the low-high speed second-stage driving gear 13 engaged with the clutch assembly. Through the meshing of the low-high speed second-stage driven gear 5, power is transmitted to the first shaft output shaft 20 and output from the first shaft output shaft 20; when the clutch assembly is coaxially fixedly connected to the first shaft output shaft 20 (as Figure 7 ), power is input from the input shaft 1 and transmitted to the low-high speed first-stage driven gear 11 through the low-high speed first-stage driving gear 3. Under the connection of the second shaft output shaft 19, power is transmitted from the second shaft output shaft 19 to the low-high speed second-stage driving gear 13. Through the meshing of the low-high speed second-stage driven gear 5, power is transmitted to the clutch assembly engaged with the low-high speed second-stage driven gear 5, and then transmitted to the first shaft output shaft 20 and output from the first shaft output shaft 20.

[0054] Embodiment 5

[0055] As Figures 1 to 8 , on the basis of Embodiments 1-4, the reverse gear transmission assembly includes a reverse gear driving gear 16, an idler gear 8 meshing with the reverse gear driving gear 16, and a reverse gear driven gear 21 meshing with the idler gear 8; when the clutch assembly is coaxially fixedly connected to the second shaft output shaft 19 (as Figures 1 to 4 ), the clutch assembly is used to engage the reverse gear driving gear 16. The reverse gear driving gear 16 slides and is coaxially rotatably connected to the second shaft output shaft 19, and the reverse gear driven gear 21 is coaxially fixedly connected to the first shaft output shaft 20; when the clutch assembly is coaxially fixedly connected to the first shaft output shaft 20 (as Figures 5 to 8 ), the clutch assembly is used to engage the reverse gear driven gear 21. The reverse gear driven gear 21 slides and is coaxially rotatably connected to the first shaft output shaft 20, and the reverse gear driving gear 16 is coaxially fixedly connected to the second shaft output shaft 19.

[0056] The beneficial effects of adopting the preferred solutions in the above embodiments are that when implementing the power reverse gear function, as Figure 4 , when the clutch assembly is coaxially and fixedly connected to the second shaft output shaft 19, power is input from the input shaft 1 and transmitted from the low / high gear first-stage driving gear 3 to the low / high gear first-stage driven gear 11. Under the connection of the second shaft output shaft 19, the power is transmitted from the second shaft output shaft 19 to the clutch assembly, and then transmitted to the reverse gear driving gear 16 engaged with the clutch assembly. Under the transmission of the idle gear 8 and the reverse gear driven gear 21, the power is transmitted to the first shaft output shaft 20 and output from the first shaft output shaft 20; as Figure 8 , when the clutch assembly is coaxially and fixedly connected to the first shaft output shaft 20, power is input from the input shaft 1 and transmitted from the low / high gear first-stage driving gear 3 to the low / high gear first-stage driven gear 11. Under the connection of the second shaft output shaft 19, the power is transmitted from the second shaft output shaft 19 to the reverse gear driving gear 16, and then transmitted to the idle gear 8 and the reverse gear driven gear 21. After that, the power is transmitted to the clutch assembly engaged with the reverse gear driven gear 21, and finally transmitted to the first shaft output shaft 20 and output from the first shaft output shaft 20.

[0057] Figures 1 to 8 In , the idle gear 8 and the reverse gear driving gear 16 are shown in a separated state. However, during the installation process, the reverse gear driving gear 16, the idle gear 8, and the reverse gear driven gear 21 can be arranged in a straight line as a whole, or the three can be arranged in a triangular state, and the reverse gear driving gear 16 and the reverse gear driven gear 21 are in a separated state, and the idle gear 8 is simultaneously engaged with the reverse gear driving gear 16 and the reverse gear driven gear 21.

[0058] On the basis of the above embodiments, a tractor power high / low / reverse gear system of the present invention further includes an idle gear shaft bearing 7. Idle gear shaft bearings 7 are arranged at both ends of the wheel shaft of the idle gear 8, and the inner ring of the idle gear shaft bearing 7 is coaxially and fixedly connected to the idle gear wheel shaft to support the idle gear 8 through the idle gear shaft bearings 7.

[0059] Embodiment 6

[0060] As Figures 1 to 8 , on the basis of Embodiments 1-5, the clutch assembly includes a low / high gear clutch 14 and a reverse gear clutch 15 arranged coaxially. The low / high gear clutch 14 and the reverse gear clutch 15 are simultaneously coaxially and fixedly connected to the first shaft output shaft 20 or the second shaft output shaft 19. The low / high gear clutch 14 is used to engage with the secondary transmission assembly, and the reverse gear clutch 15 is used to engage with the reverse gear transmission assembly.

[0061] The beneficial effects of adopting the preferred solutions in the above embodiments are as follows: when implementing the power low-gear forward gear function, the low-high gear clutch 14 engages with the secondary transmission assembly to transmit power to the first-axis output shaft 20 and output it, realizing power low-gear forward; when implementing the power reverse gear function, the reverse gear clutch 15 engages with the reverse gear transmission assembly to transmit power to the first-axis output shaft 20 and output it, realizing power reverse gear.

[0062] Embodiment 7

[0063] As Figure 1 and Figure 5 On the basis of Embodiments 1-6, a tractor power high-low-reverse gear system according to the present invention further includes an input shaft support bearing 2, a left first-axis output shaft support bearing 6, and a right first-axis output shaft support bearing 9. The inner ring of the input shaft support bearing 2 is coaxially and fixedly connected to the input shaft 1. The inner ring of the left first-axis output shaft support bearing 6 is coaxially and fixedly connected to the output end of the input shaft 1, and the outer ring is coaxially and fixedly connected to the inner side of the input end of the first-axis output shaft 20. The inner ring of the right first-axis output shaft support bearing 9 is coaxially and fixedly connected to the output end of the first-axis output shaft 20.

[0064] The beneficial effects of adopting the preferred solutions in the above embodiments are as follows: the input shaft 1 can be supported by the input shaft support bearing 2, and the input shaft 1 and the first-axis output shaft 20 can be kept coaxial through the connection of the left first-axis output shaft support bearing 6. At the same time, the first-axis output shaft 20 can be kept stable under the support of the left first-axis output shaft support bearing 6 and the right first-axis output shaft support bearing 9.

[0065] Embodiment 8

[0066] As Figure 1 and Figure 5 On the basis of Embodiments 1-7, a tractor power high-low-reverse gear system according to the present invention further includes a second-axis front bearing 10 and a second-axis rear bearing 18. The inner ring of the second-axis front bearing 10 is coaxially and fixedly connected to the input end of the second-axis output shaft 19, and the inner ring of the second-axis rear bearing 18 is coaxially and fixedly connected to the output end of the second-axis output shaft 19.

[0067] The beneficial effects of adopting the preferred solutions in the above embodiments are as follows: the second-axis output shaft 19 can be stably supported by the second-axis front bearing 10 and the second-axis rear bearing 18.

[0068] Embodiment 9

[0069] As Figure 1 and Figure 5, on the basis of Embodiments 1-8, a high-low reverse gear system for a tractor according to the present invention further includes a high-low second-stage gear support bearing 12 and a reverse gear support bearing 17. The inner rings of the high-low second-stage gear support bearing 12 and the reverse gear support bearing 17 are coaxially and fixedly connected to the second shaft output shaft 19 or the first shaft output shaft 20. The outer ring of the high-low second-stage gear support bearing 12 is coaxially and fixedly connected to the second-stage transmission assembly, and the outer ring of the reverse gear support bearing 17 is coaxially and fixedly connected to the reverse gear transmission assembly.

[0070] The beneficial effect of adopting the preferred solution in the above embodiment is that the second-stage transmission assembly can be supported by the high-low second-stage gear support bearing 12, and the reverse gear transmission assembly can be supported by the reverse gear support bearing 17, ensuring the installation stability of the second-stage transmission assembly and the reverse gear transmission assembly when the clutch assembly is combined with the second-stage transmission assembly and the reverse gear transmission assembly respectively.

[0071] Embodiment 10

[0072] The present invention also provides a tractor, including a high-low reverse gear system for a tractor as described in Embodiments 1-9.

[0073] The beneficial effect of adopting the preferred solution in the above embodiment is that with this high-low reverse gear system for a tractor, a total of seven gears are used to achieve two forward gears and one reverse gear, and the power transmission efficiency is the highest and the power consumption is the lowest under the power high gear forward gear function.

[0074] The specific transmission route is as follows:

[0075] Scheme 1 (as Figures 1 - 4 )

[0076] Under the power high gear forward gear function, as Figure 2 , the power of the engine can be input through the input shaft 1, and after the engagement of the high-low clutch 4, it is directly output through the first shaft output shaft 20 without consuming power through gears, and the transmission efficiency is the highest at this time;

[0077] Under the power low gear forward gear function, as Figure 3 , the power is input from the input shaft 1 and transmitted to the high-low first-stage driven gear 11 through the high-low first-stage driving gear 3. Under the connection of the second shaft output shaft 19, the power is transmitted from the second shaft output shaft 19 to the high-low clutch 14 of the clutch assembly, and then transmitted to the high-low second-stage driving gear 13 engaged with the high-low clutch 14 of the clutch assembly. Through the engagement of the high-low second-stage driven gear 5, the power is transmitted to the first shaft output shaft 20 and output from the first shaft output shaft 20; the power consumption is general at this time, and coaxial output can be achieved through the first shaft output shaft 20 relative to the input shaft 1;

[0078] Under the power reverse gear function, as Figure 4, Power is input from the input shaft 1 and transmitted through the low / high gear first-stage driving gear 3 to the low / high gear first-stage driven gear 11. Under the connection of the second shaft output shaft 19, the power is transmitted from the second shaft output shaft 19 to the reverse gear clutch 15 of the clutch assembly, and then transmitted to the reverse gear driving gear 16 engaged with the reverse gear clutch 15 of the clutch assembly. Under the transmission of the idle gear 8 and the reverse gear driven gear 21, the power is transmitted to the first shaft output shaft 20 and output from the first shaft output shaft 20; at this time, the power consumption is general, and coaxial output can be achieved through the first shaft output shaft 20 relative to the input shaft 1.

[0079] Solution 2 (as Figures 5 - 8 )

[0080] In the power high gear forward gear function (at this time, the power transmission is the same as that of Solution 1), as Figure 6 , the power of the engine can be input through the input shaft 1, and after the engagement of the high / low gear clutch 4, it is directly output through the first shaft output shaft 20 without consuming power through gears. At this time, the transmission efficiency is the highest;

[0081] In the power low gear forward gear function, as Figure 7 , power is input from the input shaft 1 and transmitted through the low / high gear first-stage driving gear 3 to the low / high gear first-stage driven gear 11. Under the connection of the second shaft output shaft 19, the power is transmitted from the second shaft output shaft 19 to the low / high gear second-stage driving gear 13, and through the engagement of the low / high gear second-stage driven gear 5, the power is transmitted to the low / high gear clutch 14 of the clutch assembly engaged with the low / high gear second-stage driven gear 5 (at this time, the reverse gear clutch 15 idles), and then transmitted to the first shaft output shaft 20 and output from the first shaft output shaft 20; at this time, the power consumption is general, and coaxial output can be achieved through the first shaft output shaft 20 relative to the input shaft 1;

[0082] In the power reverse gear function, as Figure 8 , power is input from the input shaft 1 and transmitted through the low / high gear first-stage driving gear 3 to the low / high gear first-stage driven gear 11. Under the connection of the second shaft output shaft 19, the power is transmitted from the second shaft output shaft 19 to the reverse gear driving gear 16, and then transmitted to the idle gear 8 and the reverse gear driven gear 21. After that, the power is transmitted to the reverse gear clutch 15 of the clutch assembly engaged with the reverse gear driven gear 21 (at this time, the low / high gear clutch 14 idles), and finally transmitted to the first shaft output shaft 20 and output from the first shaft output shaft 20; at this time, the power consumption is general, and coaxial output can be achieved through the first shaft output shaft 20 relative to the input shaft 1.

[0083] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention.

[0084] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0085] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0086] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0087] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0088] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A tractor power high and low reverse gear system, characterized in that It includes an input shaft (1), a low-high gear first-stage driving gear (3) coaxially and fixedly connected to the middle end of the input shaft (1), a high-low gear clutch (4) coaxially and fixedly connected to the output end of the input shaft (1), and a first-axis output shaft (20) arranged coaxially with the input shaft (1), wherein the input end of the first-axis output shaft (20) is used to engage the high-low gear clutch (4); it further includes a second-axis output shaft (19) parallel to the input shaft (1), and a low-high gear first-stage driven gear (11) meshing with the low-high gear first-stage driving gear (3) is coaxially and fixedly connected to the input end of the second-axis output shaft (19). A second-stage transmission assembly and a reverse gear transmission assembly are connected to the first-axis output shaft (20) and the second-axis output shaft (19), and a clutch assembly is coaxially and fixedly connected to the first-axis output shaft (20) or the second-axis output shaft (19), and the clutch assembly is used to simultaneously engage with the second-stage transmission assembly and the reverse gear transmission assembly.

2. The tractor power high and low reverse gear system according to claim 1, wherein, The clutch assembly is coaxially and fixedly connected to the second-axis output shaft (19), a part of the second-stage transmission assembly and the reverse gear transmission assembly rotates coaxially and is slidably connected to the second-axis output shaft (19), and another part is coaxially and fixedly connected to the first-axis output shaft (20).

3. The tractor power high and low reverse gear system according to claim 1, characterized in that, The clutch assembly is coaxially and fixedly connected to the first-axis output shaft (20), a part of the second-stage transmission assembly and the reverse gear transmission assembly rotates coaxially and is slidably connected to the first-axis output shaft (20), and another part is coaxially and fixedly connected to the second-axis output shaft (19).

4. The tractor power high and low reverse gear system according to claim 1, wherein, The second-stage transmission assembly includes a low-high gear second-stage driving gear (13) and a low-high gear second-stage driven gear (5) that mesh with each other; when the clutch assembly is coaxially and fixedly connected to the second-axis output shaft (19), the clutch assembly is used to engage the low-high gear second-stage driving gear (13), the low-high gear second-stage driving gear (13) slides and is coaxially rotatably connected to the second-axis output shaft (19), and the low-high gear second-stage driven gear (5) is coaxially and fixedly connected to the first-axis output shaft (20); when the clutch assembly is coaxially and fixedly connected to the first-axis output shaft (20), the clutch assembly is used to engage the low-high gear second-stage driven gear (5), the low-high gear second-stage driven gear (5) slides and is coaxially rotatably connected to the first-axis output shaft (20), and the low-high gear second-stage driving gear (13) is coaxially and fixedly connected to the second-axis output shaft (19).

5. The tractor power high and low reverse gear system according to claim 1, characterized in that, The reverse gear transmission assembly includes a reverse gear driving gear (16), an idler gear (8) meshing with the reverse gear driving gear (16), and a reverse gear driven gear (21) meshing with the idler gear (8); when the clutch assembly is coaxially and fixedly connected to the second shaft output shaft (19), the clutch assembly is used to engage the reverse gear driving gear (16), the reverse gear driving gear (16) slides and is coaxially rotatably connected to the second shaft output shaft (19), and the reverse gear driven gear (21) is coaxially and fixedly connected to the first shaft output shaft (20); when the clutch assembly is coaxially and fixedly connected to the first shaft output shaft (20), the clutch assembly is used to engage the reverse gear driven gear (21), the reverse gear driven gear (21) slides and is coaxially rotatably connected to the first shaft output shaft (20), and the reverse gear driving gear (16) is coaxially and fixedly connected to the second shaft output shaft (19).

6. The tractor power high and low reverse gear system according to claim 1, characterized in that, The clutch assembly includes a low / high gear clutch (14) and a reverse gear clutch (15) arranged coaxially. The low / high gear clutch (14) and the reverse gear clutch (15) are simultaneously coaxially and fixedly connected to the first shaft output shaft (20) or the second shaft output shaft (19). The low / high gear clutch (14) is used to engage with the secondary transmission assembly, and the reverse gear clutch (15) is used to engage with the reverse gear transmission assembly.

7. A tractor power high and low reverse gear system according to any one of claims 1-6, characterized in that, It further includes an input shaft support bearing (2), a left first shaft output shaft support bearing (6), and a right first shaft output shaft support bearing (9). The inner ring of the input shaft support bearing (2) is coaxially and fixedly connected to the input shaft (1), the inner ring of the left first shaft output shaft support bearing (6) is coaxially and fixedly connected to the output end of the input shaft (1), and the outer ring is coaxially and fixedly connected to the inner side of the input end of the first shaft output shaft (20). The inner ring of the right first shaft output shaft support bearing (9) is coaxially and fixedly connected to the output end of the first shaft output shaft (20).

8. A tractor power high and low reverse gear system according to any one of claims 1-6, characterized in that, It further includes a front second shaft bearing (10) and a rear second shaft bearing (18); the inner ring of the front second shaft bearing (10) is coaxially and fixedly connected to the input end of the second shaft output shaft (19), and the inner ring of the rear second shaft bearing (18) is coaxially and fixedly connected to the output end of the second shaft output shaft (19).

9. The tractor power high and low reverse gear system according to any one of claims 1-6, characterized in that, It further includes a low / high gear secondary gear support bearing (12) and a reverse gear support bearing (17). The inner rings of the low / high gear secondary gear support bearing (12) and the reverse gear support bearing (17) are both coaxially and fixedly connected to the second shaft output shaft (19) or the first shaft output shaft (20). The outer ring of the low / high gear secondary gear support bearing (12) is coaxially and fixedly connected to the secondary transmission assembly, and the outer ring of the reverse gear support bearing (17) is coaxially and fixedly connected to the reverse gear transmission assembly.

10. A tractor, characterized in that, It includes a tractor power low / high / reverse gear system according to any one of claims 1 - 9.

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