Multi-purpose farm machine with rotary tillage and four-gear gearbox

Abstract

The utility model provides a four -range gearbox of four -range rotary tillage includes gearbox body and is located gearbox body in one axle, two axle, three axle, steering axle, drive axle, front -mounted two axle, direct connection front -mounted axle, transition one axle, transition two axle, reverse axle and rotary tillage auxiliary gear shift fork axle, gearbox body front side is equipped with direct connection mouth, rear side lower part is equipped with rotary tillage box connecting mouth, one axle, two axle, three axle, steering axle and drive axle are respectively by from top to bottom and are located gearbox body middle part, front -mounted two axle and direct connection front -mounted axle are respectively by from top to bottom and are located direct connection mouth place, and are respectively located one axle, two axle and three axle's front, reverse axle is located one axle rear, rotary tillage auxiliary gear shift fork axle is located front -mounted one axle rear, transition one axle and transition two axle are from left to right and are located two axle rear in proper order, and transition two axle is located rotary tillage box connecting mouth place. The utility model has realized four -range rotary tillage auxiliary gear, can keep the original common walking structure, can improve adaptability and reduce cost.

Description

Technical Field

[0001] This utility model relates to the field of agricultural tillage machines, specifically to a multi-purpose agricultural machine with a four-speed rotary tillage gearbox and a four-speed rotary tillage gearbox. Background Technology

[0002] Currently, the market offers multi-functional tillage machinery capable of rotary tillage, inter-row cultivation, ridging, and transportation in both paddy fields and dry land. However, most machines have relatively fixed rotary tillage speeds or too few gears, making them unsuitable for soils with significant differences in moisture and hardness. This results in an imbalance between tillage efficiency and effectiveness, requiring multiple tillage operations to achieve the desired results, increasing energy consumption and labor costs. Some attempts to add gears have resulted in excessively large and cumbersome machines; others have gears that are too thin and prone to damage; still others have multiple gears synchronized with the rotary tillage and travel speeds, leading to a mismatch between the blades and travel speed; some machines can only be equipped with direct drive or belts, limiting farmers' power options; and some have overly complex structures, making assembly and maintenance difficult. Summary of the Invention

[0003] To address the problems existing in the prior art, this utility model provides a multi-purpose agricultural machine with a four-speed rotary tiller and a four-speed rotary tiller gearbox, the specific solution of which is as follows:

[0004] A four-speed rotary tiller gearbox includes a gearbox body and a first shaft, a second shaft, a third shaft, a steering shaft, a drive shaft, a front-mounted second shaft, a direct-drive front shaft, a transition first shaft, a transition second shaft, a reverse shaft, and a rotary tiller shift fork shaft housed within the gearbox body. The gearbox body has a direct-drive connection port on the front side and a rotary tiller housing connection port on the lower rear side. The first shaft, second shaft, third shaft, steering shaft, and drive shaft are respectively arranged from top to bottom in the middle of the gearbox body. The front-mounted second shaft and the direct-drive front shaft are respectively arranged from top to bottom at the direct-drive connection port and are located in front of the first shaft, second shaft, and third shaft, respectively. The reverse shaft is located behind the first shaft. The rotary tiller shift fork shaft is located behind the front-mounted first shaft. The transition first shaft and the transition second shaft are arranged from left to right behind the second shaft, and the transition second shaft is located at the rotary tiller housing connection port.

[0005] Furthermore, the system includes a rotary tiller auxiliary gear shifting mechanism, a gear shift plate, a gear shift lever seat, a main gear shift lever, an auxiliary gear shift lever, a rotary tiller housing, a rotary tiller gear shift seat, and a rotary tiller gear shift lever. The gear shift plate is installed on the top rear side of the gearbox housing. The rotary tiller auxiliary gear shifting mechanism includes a rotary tiller auxiliary gear shift seat, a rotary tiller auxiliary gear shift lever, a rotary tiller auxiliary gear shift fork shaft, rotary tiller first and second gear shift forks, and rotary tiller third and fourth gear shift forks. The rotary tiller auxiliary gear shift seat and the gear shift lever seat are respectively installed on the gear shift plate from top to bottom. The rotary tiller auxiliary gear shift lever is hinged to the rotary tiller auxiliary gear shift seat, forming a swing fulcrum. The rotary tiller auxiliary gear shift fork... The shaft is rotatably supported on the gearbox body. The first and second gear shift forks and the third and fourth gear shift forks are circumferentially mounted and axially spaced on the rotary tiller auxiliary gear shift fork shaft. The forks of the first and second gear shift forks and the third and fourth gear shift forks are respectively engaged with the annular grooves of the corresponding first and second gear shift gears and the third and fourth gear shift gears to shift gears by axially sliding the corresponding gears. The main gear shift lever and the auxiliary gear shift lever are respectively hinged to the gear shift lever seat from top to bottom. The rotary tiller body is installed on the rotary tiller body connection port, the rotary tiller shift seat is installed on the top of the rotary tiller body, and the rotary tiller shift lever is hinged to the rotary tiller shift seat.

[0006] Furthermore, a belt clutch shaft or a front shaft is provided above the front second shaft, and the belt clutch shaft or the front first shaft is provided with a transmission gear and a rotary tillage first and second gear and a rotary tillage third and fourth gear that can slide axially.

[0007] The front-mounted second shaft is equipped with a front-mounted second shaft drive gear that is constantly meshed with the drive gear, as well as a rotary tillage first gear, a rotary tillage second gear, a rotary tillage third gear, and a rotary tillage fourth gear. The rotary tillage first and second gear engagement gears mesh with the rotary tillage first and second gears respectively to form the first and second gears of the rotary tillage pair transmission. The rotary tillage third and fourth gear engagement gears mesh with the rotary tillage third and fourth gears respectively to form the third and fourth gears of the rotary tillage pair transmission. The front-mounted second shaft drive gear is mounted on the front-mounted second shaft via bearings and can rotate independently. The first shaft is equipped with a first shaft drive gear that is constantly meshed with the front-mounted second shaft drive gear, as well as a first shaft double gear that can slide axially and a first shaft reverse gear engagement gear.

[0008] The two shafts are equipped with a two-shaft reverse gear, a two-shaft transmission gear, a two-shaft first gear that meshes with the first shaft first reverse gear, a two-shaft second gear and a two-shaft third gear that mesh with the first shaft double gear respectively, and a two-shaft rotary tillage gear that passes through a bearing sleeve. The two-shaft rotary tillage gear meshes with the rotary tillage first gear. The three shafts are equipped with a three-shaft large gear that meshes with the two-shaft transmission gear and a three-shaft double gear that can slide axially. The large end of the three-shaft double gear meshes with the two-shaft second gear, and the small end engages with the three-shaft large gear to form high and low gears for travel.

[0009] The steering shaft is equipped with a steering gear and an intermediate steering shaft gear that is constantly meshed with the small end of the three-axis double gear. The steering shaft is a hollow shaft structure, and a steering spring, a ball bearing, and a steering pin are coaxially arranged in sequence from the inside to the outside in its inner hole. One end of the steering spring abuts against the bottom of the inner hole of the steering shaft, and the other end abuts against the inner end of the ball bearing. The outer end of the ball bearing abuts against the inner end of the steering pin. The outer end of the steering pin extends out of the steering shaft and is used to cooperate with the external limiting structure to achieve steering positioning. The steel ball is disposed between the ball bearing and the steering pin or between the ball bearing and the inner wall of the steering shaft. The steering spring, ball bearing, steel ball, and steering pin are all installed in the same axial through hole of the steering shaft to form an axial elastic positioning assembly.

[0010] The drive shaft is provided with a drive shaft gear that meshes with the steering gear;

[0011] The reverse gear shaft is provided with a reverse gear, which meshes with a first-shaft reverse gear and a second-shaft reverse gear to form a reverse gear;

[0012] The first transition shaft is equipped with a first transition shaft gear, and the second transition shaft is equipped with a second transition shaft double gear. The first transition shaft gear meshes with the large end of the second shaft rotary tillage gear and the second transition shaft double gear, respectively. The small end of the second transition shaft double gear outputs power to the rotary tillage box.

[0013] Furthermore, both the direct connection port and the rotary tiller box connection port are detachable covers, forming an inspection and maintenance channel.

[0014] A multi-purpose agricultural machine with four-speed rotary tiller includes a belt frame, a belt engine, a drive belt, a belt clutch, a handle frame, a handle, a clutch handle, drive wheels, and a gearbox. The belt frame is installed at the lower front of the gearbox body. The belt engine is mounted on the belt frame. The belt clutch is mounted on the belt clutch shaft. The output shaft of the belt engine is connected to the belt clutch via the drive belt, thereby inputting power into the gearbox. Drive wheels are installed at both ends of the drive shaft. The handle frame is installed at the top rear of the gearbox body. One end of the handle is mounted on the handle frame, and the other end is equipped with a clutch handle. The clutch handle is connected to the disengagement pawl of the belt clutch via a pull rod to control the engagement and disengagement of the belt clutch.

[0015] A multi-purpose agricultural machine with four-speed rotary tiller includes a direct-drive frame, a direct-drive engine, a direct-drive clutch, a handlebar frame, a handlebar, a clutch handle, a direct-drive clutch mechanism, a connecting seat, a small bevel gear shaft, drive wheels, and a gearbox. The direct-drive frame is mounted on one side of the lower part of the gearbox body. The direct-drive engine is mounted on the direct-drive frame, and its output end is connected to the direct-drive clutch mechanism via the connecting seat. The small bevel gear shaft of the direct-drive clutch mechanism is supported by bearings on the direct-drive clutch housing. One end of the small bevel gear shaft is equipped with a small bevel gear. The direct-drive front shaft is equipped with a direct-drive front shaft transmission gear and a large bevel gear that meshes with the small bevel gear. The large bevel gear meshes with the transmission gear of the gearbox, thereby inputting power into the gearbox. Drive wheels are mounted at both ends of the drive shaft. The handlebar frame is mounted on the top rear side of the gearbox body. One end of the handlebar is fixed to the handlebar frame, and the other end is equipped with a clutch handle. The clutch handle is connected to the direct-drive clutch shift fork via a pull rod to control the engagement and disengagement of the direct-drive clutch.

[0016] Advantages of this utility model

[0017] 1. This utility model of a multi-purpose agricultural machine with a four-speed rotary tiller and its four-speed rotary tiller gearbox reduces the size of the original reverse gear shaft structure by adding a rotary tiller transmission gear, a front-mounted primary shaft or belt clutch shaft, and a front-mounted secondary shaft, thus achieving a four-speed rotary tiller transmission without increasing the thickness or weight of the gearbox. Because the reverse gear avoids being on the same side as the driven gear of the rotary tiller transmission, it avoids increasing the thickness and weight of the gearbox caused by adding a rotary tiller gear, greatly reducing structural complexity and cost, and increasing rotary tillage functionality and durability.

[0018] 2. The gearbox of this utility model does not require an increase in the number of drive shafts. Compared with the existing belt conveyor which requires an additional shaft to raise the clutch shaft and clutch, it has a compact structure, small housing size and low cost.

[0019] 3. The belt conveyor and direct-drive conveyor of this utility model can share a gearbox body. The direct drive and belt are interchangeable, which is simple and reliable. It can meet a variety of power selections. It can be assembled by replacing a few parts. It can maintain the original ordinary walking structure while improving adaptability and reducing costs.

[0020] 4. The rotary tillage gears of this utility model are four and independent, which can be easily adjusted to a suitable state to meet most operational needs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the external structure of a rotary tiller with a four-speed gearbox.

[0022] Figure 2 for Figure 1 A schematic diagram of the internal structure.

[0023] Figure 3 To adopt Figure 1A schematic diagram of the overall structure of a multi-purpose agricultural machine with a belt-driven rotary tiller and a four-speed rotary tiller gearbox.

[0024] Figure 4 for Figure 3 A schematic diagram of the external connection structure of the belt clutch, gearbox body and rotary tiller body.

[0025] Figure 5 for Figure 4 AA section view in the image.

[0026] Figure 6 for Figure 4 BB cross-sectional view.

[0027] Figure 7 To adopt Figure 1 A schematic diagram of the overall structure of a direct-drive multipurpose agricultural machine with a rotary tiller four-speed gearbox.

[0028] Figure 8 for Figure 7 A schematic diagram of the external connection structure of the direct-drive clutch, gearbox body, and rotary tiller body.

[0029] Figure 9 for Figure 8 CC section view in the image.

[0030] Figure 10 for Figure 8 DD sectional view.

[0031] Figure 11 for Figure 3 and Figure 7 A schematic diagram of the rotary tiller's gear shift mechanism.

[0032] In the picture:

[0033] 1. Belt conveyor frame; 2. Belt motor; 3. Drive wheel; 4. Transmission belt; 5. Gearbox housing; 6. Belt clutch; 7. Handrail frame; 8. Handrail; 9. Rotary tiller housing; 10. Clutch handle; 11. Rotary tiller auxiliary gear shift lever; 12. Main gear shift lever; 13. Auxiliary gear shift lever; 14. Rotary tiller gear shift lever; 15. Rotary tiller third and fourth gear shift gear; 16. Transmission gear; 17. Belt clutch shaft; 18. Front-mounted second shaft transmission gear; 19. Front-mounted second shaft; 20. 21. Rotary tiller third gear; 22. Rotary tiller fourth gear; 23. First shaft drive gear; 24. First shaft double gear; 25. Second shaft; 26. Second shaft second gear; 27. Third shaft double gear; 28. Third shaft; 29. ​​Steering shaft; 30. Steering gear; 31. Steering shaft intermediate gear; 32. Drive shaft; 33. Drive shaft gear; 34. Steering spring; 35. Steel ball; 36. Top ball bearing; 37. Steering pin; 38. Third shaft large gear; 39. Second shaft first gear. Gears; 40. Second-shaft reverse gear; 41. Second-shaft transmission gear; 42. Second-shaft rotary tiller gear; 43. Second-shaft third-speed gear; 44. First-shaft first-reverse gear engagement gear; 45. Reverse shaft; 46. Reverse gear; 47. Rotary tiller second-speed gear; 48. Rotary tiller first-speed gear; 49. Rotary tiller first-second gear engagement gear; 50. Transition first-shaft gear; 51. Transition first-shaft; 52. Transition second-shaft double gear; 53. Transition second-shaft; 54. Direct-drive machine frame; 55. Direct-drive engine; 56. 57. Direct-drive clutch mechanism; 58. Connecting seat; 59. Direct-drive clutch; 60. Small bevel gear shaft; 61. Large bevel gear; 62. Direct-drive front shaft transmission gear; 63. Direct-drive front shaft; 64. Front shaft; 65. Direct-drive connection port; 66. Rotary tiller housing connection port; 67. Rotary tiller pair gear shift fork shaft; 68. Rotary tiller first and second gear shift fork; 69. Rotary tiller third and fourth gear shift fork; 70. Gear shift plate; 71. Rotary tiller pair gear shift holder; 72. Gear shift lever seat; 73. Rotary tiller gear shift holder. Detailed Implementation

[0034] The present invention will be further explained and described below with reference to the accompanying drawings and specific embodiments. It should be noted that the specific embodiments are not intended to limit the scope of the present invention.

[0035] like Figures 1 to 11 As shown in the figure, this specific embodiment provides a multi-purpose agricultural machine with a rotary tillage four-speed gearbox and a rotary tillage four-speed gearbox.

[0036] like Figure 1 and Figure 2As shown, the rotary tiller four-speed gearbox includes a gearbox body 5 and a primary shaft 23, a secondary shaft 25, a tertiary shaft 28, a steering shaft 29, a drive shaft 32, a front-mounted secondary shaft 19, a direct-drive front-mounted shaft 62, a transition primary shaft 51, a transition secondary shaft 53, a reverse shaft 45, a rotary tiller auxiliary gear shifting mechanism, a gear shift plate 69, a gear shift lever seat 71, a main gear shift lever 12, an auxiliary gear shift lever 13, a rotary tiller housing 9, a rotary tiller shifting seat 72, and a rotary tiller shift lever 14.

[0037] The gearbox body 5 has a direct connection port 64 on the front side for connecting the direct clutch mechanism 56; the gearbox body 5 has a rotary tillage box connection port 65 on the lower rear side for connecting the rotary tillage box 9; both the direct connection port 64 and the rotary tillage box connection port 65 are removable covers, forming an inspection channel.

[0038] Shaft 23, shaft 25, shaft 28, steering shaft 29 and drive shaft 32 are respectively arranged from top to bottom in the middle of gearbox body 5, and the center lines of shaft 23, shaft 25, shaft 28, steering shaft 29 and drive shaft 32 are on the same vertical line. The purpose is to make the center of gravity of the whole machine located at the position of the line connecting the center lines of shaft 23, shaft 25, shaft 28, steering shaft 29 and drive shaft 32, thereby improving the overall balance of the machine and reducing the force required to lift the blades mounted on the rotary tiller body 9 during steering operations. The front-mounted second shaft 19 and the direct-drive front shaft 62 are respectively located at the direct-drive connection port 64 from top to bottom, and are in front of the first shaft 23, the second shaft 25, and the third shaft 28. The reverse gear shaft 45 is located behind the first shaft 23. The rotary tiller shift fork shaft 66 is located behind the front-mounted first shaft 63. The transition first shaft 51 and the transition second shaft 53 are located behind the second shaft 25 from left to right, and the transition second shaft 53 is located at the rotary tiller box connection port 65. The two ends of the front-mounted second shaft 19, the direct-drive front shaft 62, the first shaft 23, the second shaft 25, the third shaft 28, the steering shaft 29, the drive shaft 32, and the transition first shaft 51 are respectively mounted on the gearbox body 5 by bearings. The two ends of the reverse gear shaft 45 are respectively mounted on one side of the gearbox body 5 with nuts, and the two ends of the transition second shaft 53 are respectively mounted on both sides of the gearbox body 5 with nuts.

[0039] Above the front-mounted second shaft 19 is a belt-driven clutch shaft 17 or a front-mounted first shaft 63. Both ends of the belt-driven clutch shaft 17 or the front-mounted first shaft 63 are respectively mounted on the gearbox body 5 via bearings. The belt-driven clutch shaft 17 or the front-mounted first shaft 63 is provided with a transmission gear 16, a rotary tillage first and second gear shifting gear 49, and a rotary tillage third and fourth gear shifting gear 15. The transmission gear 16 is mounted on the belt-driven clutch shaft 17 or the front-mounted first shaft 63 via splines and is fixed with a retaining ring. The rotary tillage first and second gear shifting gear 49 and the rotary tillage third and fourth gear shifting gear 15 are respectively mounted on the belt-driven clutch shaft 17 via splines and are capable of axial sliding.

[0040] The front-mounted second shaft 19 is provided with a front-mounted second shaft transmission gear 18 that is constantly meshed with the transmission gear 16, as well as a rotary tillage first gear 48, a rotary tillage second gear 47, a rotary tillage third gear 20, and a rotary tillage fourth gear 21.

[0041] The front-mounted second-shaft drive gear 18 is mounted on the front-mounted second-shaft 19 via bearings and can rotate independently. The rotary tillage third-speed gear 20, rotary tillage fourth-speed gear 21, rotary tillage second-speed gear 47, and rotary tillage first-speed gear 48 are respectively mounted on the front-mounted second-shaft 19 via splines. The rotary tillage first and second-speed engagement gear 49 meshes with the rotary tillage first-speed gear 48 and rotary tillage second-speed gear 47 to form the first and second speeds of the rotary tillage pair. The rotary tillage third and fourth-speed engagement gear 15 meshes with the rotary tillage third-speed gear 20 and rotary tillage fourth-speed gear 21 to form the third and fourth speeds of the rotary tillage pair.

[0042] The shaft 23 is provided with a shaft transmission gear 22 that is constantly meshed with the front two-shaft transmission gear 18, as well as a shaft double gear 24 and a shaft reverse gear 44 that can slide axially. The shaft transmission gear 22 is mounted on the shaft 23 by splines and fixed by a retaining ring. The shaft double gear 24 and the shaft reverse gear 44 are respectively mounted on the shaft 23 by splines and can slide axially.

[0043] The second shaft 25 is equipped with a second shaft reverse gear 40, a second shaft drive gear 41, a second shaft first gear 39 that meshes with a first shaft first reverse gear 44, a second shaft second gear 26 and a second shaft third gear 43 that mesh with a first shaft double gear 24 respectively, and a second shaft rotary tiller gear 42 that is loosely mounted on a bearing sleeve. The second shaft rotary tiller gear 42 meshes with a rotary tiller first gear 48. The second gear, third gear, first gear 39, reverse gear 40, and drive gear 41 of the second shaft 25 are respectively mounted on the second shaft 25 via splines. The second shaft rotary tiller gear 42 is mounted on the second shaft 25 via bearings and can rotate independently.

[0044] The three-axis 28 is equipped with a three-axis large gear 38 that meshes with the two-axis transmission gear 41 and a three-axis double gear 27 that can slide axially. The large end of the three-axis double gear 27 meshes with the two-axis second gear 26, and the small end engages with the three-axis large gear 38 to form a high and low gear for travel. The three-axis double gear 27 is mounted on the three-axis 28 through a light hole and can slide axially. The three-axis large gear 38 is mounted on the three-axis 28 through a bearing and can rotate independently.

[0045] The steering shaft 29 is equipped with a steering gear 30 and a steering shaft intermediate gear 31 that is constantly meshed with the small end of the three-axis double gear 27. The steering gear 30 is mounted on the steering shaft 29 through a light hole, and the steering shaft intermediate gear 31 is mounted on the steering shaft 29 through a spline. The steering shaft 29 is a hollow shaft structure, and a steering spring 34, a top ball shaft 36, and a steering pin 37 are coaxially arranged in its inner hole from the inside to the outside. One end of the steering spring 34 abuts against the bottom of the inner hole of the steering shaft 29, and the other end abuts against the inner end of the top ball shaft 36. The outer end of the top ball bearing 36 abuts against the inner end of the steering pin 37. The outer end of the steering pin 37 extends out of the steering shaft 29 and is used to cooperate with the external limiting structure to achieve steering positioning. The steel ball 35 is disposed between the top ball bearing 36 and the steering pin 37 or between the top ball bearing 36 and the inner wall of the steering shaft 29 to reduce friction and achieve smooth transmission of elastic pressure. The steering spring 34, the top ball bearing 36, the steel ball 35, and the steering pin 37 are all installed in the same axial through hole 23 of the steering shaft 29 to form an axial elastic positioning assembly.

[0046] The drive shaft 32 is provided with a drive shaft gear 33 that meshes with the steering gear 30;

[0047] The reverse gear shaft 45 is provided with a reverse gear 46. The reverse gear 46 is installed on the reverse gear shaft 45 through a bushing bearing. The reverse gear 46 meshes with the first shaft reverse gear engagement gear 44 and the second shaft reverse gear 40 to form a reverse gear.

[0048] The first transition shaft 51 is equipped with a first transition shaft gear 50, which is mounted on the first transition shaft 51 through a light hole. The second transition shaft 53 is equipped with a second transition shaft double gear 52. The first transition shaft gear 50 meshes with the large end of the second shaft rotary tillage gear 42 and the second transition shaft double gear 52, respectively. The small end of the second transition shaft double gear 52 outputs power to the rotary tillage box 9. The second transition shaft double gear 52 is mounted on the second transition shaft 53 through bearings.

[0049] The gear shift plate 69 is mounted on the top rear side of the gearbox housing. The rotary tillage pair gear shifting mechanism includes a rotary tillage pair gear shifting seat 70, a rotary tillage pair gear shifting lever 11, a rotary tillage pair gear shifting fork shaft 66, a first and second gear shifting fork 67, and a third and fourth gear shifting fork 68. The rotary tillage pair gear shifting seat 70 and the gear shift lever seat 71 are respectively mounted on the gear shift plate 69 from top to bottom. The rotary tillage pair gear shifting lever 11 is hinged to the rotary tillage pair gear shifting seat 70, forming a swing fulcrum. The rotary tillage pair gear shifting fork shaft 66 is rotatably supported on the gearbox housing. The first and second gear shifting forks 67 and the third and fourth gear shifting forks 68 are circumferentially mounted and axially... The rotary tiller's auxiliary transmission shift fork shaft 66 is spaced apart, and the forks of the rotary tiller's first and second gear shift forks 67 and third and fourth gear shift forks 68 respectively engage with the annular grooves of the corresponding rotary tiller's first and second gear shift gears 49 and third and fourth gear shift gears 15, so as to shift gears by axially sliding the corresponding gears. The main transmission shift lever 12 and the auxiliary transmission shift lever 13 are mounted on the transmission lever seat 71 from top to bottom through ball joint and ball seat structure. The rotary tiller housing 9 is mounted on the rotary tiller housing connection port 65, the rotary tiller shift seat 72 is mounted on the top of the rotary tiller housing 9, and the rotary tiller shift lever 14 is hinged to the rotary tiller shift seat 72 through the ball joint and ball seat structure. The specific structure and installation method of the main transmission shift lever 12, the auxiliary transmission shift lever 13, and the rotary tiller shift lever 14 are the same as those of existing common hand-held tractors, and will not be repeated here.

[0050] Implementation Method 1: Belt-driven multi-purpose agricultural machinery with four rotary tillage gears

[0051] When belt drive is required for farming, the aforementioned four-speed rotary tiller gearbox can be used to assemble a belt-driven multi-purpose agricultural machine with four-speed rotary tiller, such as... Figures 3 to 6 , Figure 11 As shown, the multi-purpose agricultural machine with a four-speed rotary tiller includes a belt frame, a belt engine 2, a transmission belt 4, a belt clutch 6, a handle frame 7, a handle 8, a clutch handle 10, a drive wheel 3, and a gearbox 5. The belt frame 1 is bolted to the lower front part of the bottom of the gearbox 5. The belt engine 2 is bolted to the belt frame 1. The belt clutch 6 is mounted on the belt clutch shaft 17. The output shaft of the belt engine 2 is connected to the belt clutch 6 through the transmission belt 4, thereby inputting power into the gearbox. The drive wheel 3 is mounted at both ends of the drive shaft 32. The handle frame 7 is bolted to the top rear side of the gearbox 5. One end of the handle 8 is bolted to the handle frame 7, and the other end is equipped with the clutch handle 10. The clutch handle 10 is connected to the disengagement claw of the belt clutch 6 through a pull rod to control the engagement and disengagement of the belt clutch 6.

[0052] Working principle:

[0053] 1. Walking transmission system

[0054] After starting the belt-driven motor 2, the output shaft of the belt-driven motor 2 sends power to the belt clutch 6 through the transmission belt 4; when the clutch handle 10 controls the clutch to engage, the belt clutch shaft 17 rotates accordingly. The transmission gear 16 on the belt clutch shaft 17 is constantly meshed with the front second shaft transmission gear 18, and the front second shaft transmission gear 18 is constantly meshed with the first shaft transmission gear 22, so that the first shaft 23 obtains rotational motion.

[0055] The double gear 24 on shaft 23 and the reverse gear 44 on shaft 24 can slide axially and mesh with the second gear 26, the third gear 43, the first gear 39 on shaft 25 or the reverse gear 46 on reverse shaft 45, respectively, to complete the selection of first gear, second gear, third gear and reverse gear.

[0056] The second-axis transmission gear 41 on the second shaft 25 meshes with the third-axis large gear 38, transmitting power to the third shaft 28. The third-axis double gear 27 can slide axially, with its large end meshing with the second-axis second-gear 26 and its small end engaging with the third-axis large gear 38, forming high and low gears for movement. The small end of the third-axis double gear 27 is constantly meshed with the intermediate gear 31 of the steering shaft, driving the steering shaft 29 to rotate. The steering gear 30 on the steering shaft 29 meshes with the drive shaft gear 33, ultimately sending power to the drive shaft 32, driving the drive wheels 3 at both ends to achieve the movement of the entire machine.

[0057] The main transmission shift lever 12 moves the corresponding gear on the first shaft 23 to complete the switching between first, second, third and reverse gears; the auxiliary transmission shift lever 13 moves the triple-shaft double gear 27 to complete the switching between high and low gears.

[0058] 2. Rotary tillage transmission system

[0059] When the belt clutch shaft 17 rotates, it drives the rotary tillage third and fourth gear shifting gear 15 and the rotary tillage first and second gear shifting gear 49. The rotary tillage first and second gear shifting gear 49 meshes with the rotary tillage first gear 48 and the rotary tillage second gear 47 respectively to form the first and second gears of the rotary tillage pair. The rotary tillage third and fourth gear shifting gear 15 meshes with the rotary tillage third gear 20 and the rotary tillage fourth gear 21 respectively to form the third and fourth gears of the rotary tillage pair.

[0060] The rotary tillage gear 42, which is loosely fitted on the second shaft 25, meshes with the first rotary tillage gear 48, thereby continuously obtaining rotational motion; the transition first shaft gear 50 meshes with the rotary tillage gear 42, transmitting power to the transition second shaft double gear 52, and the small end of the transition second shaft double gear 52 outputs power to the rotary tillage box 9 through the rotary tillage box connection port 65, driving the rotary tillage blades to work.

[0061] The rotary tiller's gear shift lever 11 swings through the ball joint and ball seat fulcrum, driving the rotary tiller's first and second gear shift fork 67 or rotary tiller's third and fourth gear shift fork 68 mounted on the rotary tiller's gear shift fork shaft 66 to axially slide the rotary tiller's first and second gear shift gear 49 or rotary tiller's third and fourth gear shift gear 15 on the belt clutch shaft 17, so that the corresponding gear of the rotary tiller on the front second shaft 19 is connected to the power line, realizing the selection of rotary tiller's first, second, third, and fourth gears; the travel chain can be in any gear or neutral at this time without affecting the rotary tiller shaft speed.

[0062] Implementation Method Two: Direct-drive multi-purpose agricultural machinery with four rotary tillage speeds

[0063] When direct drive is required for farming, the aforementioned four-speed rotary tiller gearbox can be used to assemble a direct-drive multi-purpose agricultural machine with four-speed rotary tiller, such as... Figure 7 To the end Figure 11 As shown, the direct-drive multi-purpose agricultural machine with four-speed rotary tillage includes a direct-drive frame, a direct-drive engine 55, a direct-drive clutch 58, a handle frame 7, a handle 8, a clutch handle 10, a direct-drive clutch mechanism 56, a connecting seat 57, a small bevel gear shaft 59, a drive wheel 3, and a gearbox body 5. The direct-drive frame is installed on one side of the lower part of the gearbox body 5. The direct-drive engine 55 is installed on the direct-drive frame, and its output end is connected to the direct-drive clutch mechanism 56 through the connecting seat 57. The direct-drive clutch mechanism 56 adopts the structure of the clutch mechanism with patent number 2020214159372. The small bevel gear shaft 59 of the direct-drive clutch mechanism 56 is supported by bearings on the direct-drive clutch housing of the direct-drive clutch mechanism 56. One end of the small bevel gear shaft 59 is provided with a small bevel gear. The direct-drive front shaft 62 is provided with a direct-drive front shaft drive gear 61 and a large bevel gear 60 that meshes with the small bevel gear. The large bevel gear 60 drives the direct-drive front shaft 62 to rotate, thereby inputting power into the gearbox. The drive wheels 3 are installed at both ends of the drive shaft 32. The armrest frame 7 is installed on the rear top of the gearbox body 5. One end of the armrest 8 is fixed on the armrest frame 7, and the other end is equipped with a clutch handle 10. The clutch handle 10 is connected to the shift fork of the direct-drive clutch 58 through a pull rod to control the engagement and disengagement of the direct-drive clutch 58.

[0064] Working principle:

[0065] I. Walking transmission system

[0066] After the direct-drive engine 55 starts, its output end drives the direct-drive clutch mechanism 56 through the connecting seat 57; the clutch handle 10 controls the direct-drive clutch 58 to engage or disengage via the pull rod. When engaged, the small bevel gear shaft 59 rotates, and the small bevel gear meshes with the large bevel gear 60 on the direct-drive front shaft 62, so that the direct-drive front shaft 62 obtains initial power.

[0067] The direct-drive gear 61 on the direct-drive front shaft 62 is constantly meshed with the front second shaft drive gear 18, and the front second shaft drive gear 18 is constantly meshed with the drive gear 16, sending power to the front first shaft 63; the front second shaft drive gear 18 is constantly meshed with the first shaft drive gear 22, causing the first shaft 23 to rotate.

[0068] The double gear 24 on shaft 23 and the reverse gear 44 on shaft 24 can slide axially and mesh with the second gear 26, the third gear 43, the first gear 39 on shaft 25 or the reverse gear 46 on reverse shaft 45, respectively, to complete the selection of first gear, second gear, third gear and reverse gear.

[0069] The second-axis transmission gear 41 on the second shaft 25 meshes with the third-axis large gear 38, transmitting power to the third shaft 28. The third-axis double gear 27 can slide axially; its large end meshes with the second-axis second-gear 26, and its small end engages with the third-axis large gear 38, forming high and low gears for movement. The small end of the third-axis double gear 27 is constantly meshed with the intermediate gear 31 of the steering shaft, driving the steering shaft 29 to rotate. The steering gear 30 on the steering shaft 29 meshes with the drive shaft gear 33, ultimately sending power to the drive shaft 32, driving the drive wheels 3 at both ends to achieve the movement of the entire machine.

[0070] The main transmission shift lever 12 moves the corresponding gear of the first shaft 23 to complete the switching of first, second, third and reverse gears; the auxiliary transmission shift lever 13 moves the triple shaft double gear 27 to complete the switching of high and low gears.

[0071] II. Rotary Tillage Drive System

[0072] The large bevel gear 60 on the direct-drive front shaft 62 drives the direct-drive front shaft transmission gear 61 to rotate. The direct-drive front shaft transmission gear 61 is constantly meshed with the front shaft transmission gear 18, which in turn is constantly meshed with the transmission gear 16, causing the front shaft 63 to rotate. The front shaft 63 drives the rotary tillage third and fourth gear shifting gear 15 and the rotary tillage first and second gear shifting gear 49. The rotary tillage first and second gear shifting gear 49 meshes with the rotary tillage first gear 48 and the rotary tillage second gear 47, respectively, to form the first and second gears of the rotary tillage pair. The rotary tillage third and fourth gear shifting gear 15 meshes with the rotary tillage third gear 20 and the rotary tillage fourth gear 21, respectively, to form the third and fourth gears of the rotary tillage pair.

[0073] The rotary tillage gear 42, which is loosely fitted on the second shaft 25, meshes with the first rotary tillage gear 48, continuously obtaining rotational motion; the transition first shaft gear 50 meshes with the rotary tillage gear 42, transmitting power to the transition second shaft double gear 52, and the small end of the transition second shaft double gear 52 outputs power to the rotary tillage box 9 through the rotary tillage box connection port 65, driving the rotary tillage blades to work.

[0074] The rotary tiller shift lever 11 swings through the ball joint fulcrum, driving the rotary tiller shift fork 67 (first and second gear) or the rotary tiller shift fork 68 (third and fourth gear) on the rotary tiller shift fork shaft 66. This causes the rotary tiller shift gear 49 (first and second gear) or the rotary tiller shift gear 15 (third and fourth gear) on the front shaft 63 to slide axially, allowing the corresponding gear on the front shaft 19 to engage the power path, thus enabling the selection of rotary tiller first, second, third, and fourth gears. The travel chain can be in any gear or neutral at this time without affecting the rotary tiller shaft speed.

Claims

1. A rotary tiller with a four-speed gearbox, characterized in that, The system includes a gearbox housing and a primary shaft, a secondary shaft, a tertiary shaft, a steering shaft, a drive shaft, a front-mounted secondary shaft, a direct-drive front-mounted shaft, a transition primary shaft, a transition secondary shaft, a reverse shaft, and a rotary tiller shift fork shaft housed within the gearbox housing. The gearbox housing has a direct-drive connection port on its front side and a rotary tiller housing connection port on its lower rear side. The primary shaft, secondary shaft, tertiary shaft, steering shaft, and drive shaft are arranged from top to bottom in the middle of the gearbox housing. The front-mounted secondary shaft and the direct-drive front-mounted shaft are arranged from top to bottom at the direct-drive connection port, respectively, and are located in front of the primary shaft, secondary shaft, and tertiary shaft. The reverse shaft is located behind the primary shaft. The rotary tiller shift fork shaft is located behind the front-mounted primary shaft. The transition secondary shaft and the transition secondary shaft are arranged from left to right behind the secondary shaft, with the transition secondary shaft located at the rotary tiller housing connection port.

2. The gearbox according to claim 1, characterized in that, The rotary tiller transmission includes a gear shifting mechanism, a gear shift plate, a gear shift lever seat, a main gear shift lever, a secondary gear shift lever, a rotary tiller housing, a rotary tiller gear shift seat, and a rotary tiller gear shift lever. The gear shift plate is mounted on the top rear side of the gearbox housing. The rotary tiller transmission includes a rotary tiller gear shift seat, a rotary tiller gear shift lever, a rotary tiller gear shift fork shaft, first and second gear shift forks, and third and fourth gear shift forks. The rotary tiller gear shift seat and gear shift lever seat are mounted on the gear shift plate from top to bottom. The rotary tiller gear shift lever is hinged to the rotary tiller gear shift seat, forming a swing fulcrum. The rotary tiller gear shift fork shaft is rotatable. The rotary tiller is supported on the gearbox body. The first and second gear shift forks and the third and fourth gear shift forks are circumferentially mounted and axially spaced on the rotary tiller auxiliary shift fork shaft. The forks of the first and second gear shift forks and the third and fourth gear shift forks are respectively engaged with the annular grooves of the corresponding first and second gear shift gears and the third and fourth gear shift gears to shift gears by axially sliding the corresponding gears. The main gear shift lever and the auxiliary gear shift lever are hinged to the gear shift lever seat from top to bottom. The rotary tiller body is mounted on the rotary tiller body connection port. The rotary tiller shift seat is mounted on the top of the rotary tiller body. The rotary tiller shift lever is hinged to the rotary tiller shift seat.

3. The gearbox according to claim 1, characterized in that, A belt clutch shaft or a front shaft is provided above the front two shafts. The belt clutch shaft or the front shaft is provided with a transmission gear and a rotary tillage first and second gear and a rotary tillage third and fourth gear that can slide axially. The front-mounted second shaft is equipped with a front-mounted second shaft transmission gear that is constantly meshed with the transmission gear, as well as a rotary tillage first gear, a rotary tillage second gear, a rotary tillage third gear, and a rotary tillage fourth gear; the rotary tillage first and second gear engagement gears mesh with the rotary tillage first gear and the rotary tillage second gear respectively to form the first and second gears of the rotary tillage pair transmission, and the rotary tillage third and fourth gear engagement gears mesh with the rotary tillage third gear and the rotary tillage fourth gear respectively to form the third and fourth gears of the rotary tillage pair transmission, and the front-mounted second shaft transmission gear is mounted on the front-mounted second shaft through bearings and can rotate independently; The shaft is provided with a shaft transmission gear that is constantly meshed with the front two shaft transmission gear, as well as a shaft double gear that can slide axially and a shaft reverse gear. The two shafts are equipped with a reverse gear, a transmission gear, a first gear that meshes with the reverse gear of the first shaft, a second gear that meshes with the double gear of the first shaft, a third gear and a rotary tiller that mesh with the double gear of the first shaft respectively, and a rotary tiller that passes through a bearing sleeve. The rotary tiller meshes with the first gear. The three shafts are equipped with a large three-shaft gear that meshes with the two-shaft transmission gear and a three-shaft double gear that can slide axially. The large end of the three-shaft double gear meshes with the second gear of the two shafts, and the small end engages with the large three-shaft gear to form high and low gears for travel. The steering shaft is equipped with a steering gear and an intermediate steering shaft gear that is constantly meshed with the small end of the three-axis double gear. The steering shaft is a hollow shaft structure, and a steering spring, a ball bearing, and a steering pin are coaxially arranged in sequence from the inside to the outside in its inner hole. One end of the steering spring abuts against the bottom of the inner hole of the steering shaft, and the other end abuts against the inner end of the ball bearing. The outer end of the ball bearing abuts against the inner end of the steering pin. The outer end of the steering pin extends out of the steering shaft and is used to cooperate with an external limiting structure to achieve steering positioning. A steel ball is arranged between the ball bearing and the steering pin, or between the ball bearing and the inner wall of the steering shaft. The steering spring, ball bearing, steel ball, and steering pin are all installed in the same axial through hole of the steering shaft to form an axial elastic positioning assembly. The drive shaft is provided with a drive shaft gear that meshes with the steering gear; The reverse gear shaft is provided with a reverse gear, which meshes with a first-shaft reverse gear and a second-shaft reverse gear to form a reverse gear; The first transition shaft is equipped with a first transition shaft gear, and the second transition shaft is equipped with a second transition shaft double gear. The first transition shaft gear meshes with the large end of the second shaft rotary tillage gear and the second transition shaft double gear, respectively. The small end of the second transition shaft double gear outputs power to the rotary tillage box.

4. The gearbox according to claim 1, characterized in that: Both the direct connection port and the rotary tiller box connection port are removable covers, forming an inspection and maintenance passage.

5. A multi-purpose agricultural machine with four-speed rotary tillage, characterized in that: The transmission includes a belt conveyor frame, a belt motor, a drive belt, a belt clutch, a handrail frame, a handrail, a clutch handle, a drive wheel, and a gearbox as described in any one of claims 1 to 4. The belt conveyor frame is installed on the lower front side of the bottom of the gearbox body. The belt motor is installed on the belt conveyor frame. The belt clutch is installed on the belt clutch shaft. The output shaft of the belt motor is connected to the belt clutch via a drive belt, thereby inputting power into the gearbox. The drive wheel is installed at both ends of the drive shaft. The handrail frame is installed on the top rear side of the gearbox body. One end of the handrail is installed on the handrail frame, and the other end is equipped with a clutch handle. The clutch handle is connected to the disengagement pawl of the belt clutch via a pull rod to control the engagement and disengagement of the belt clutch.

6. A multi-purpose agricultural machine with four-speed rotary tillage, characterized in that, The system includes a direct-drive frame, a direct-drive engine, a direct-drive clutch, a handrail frame, a handrail, a clutch handle, a direct-drive clutch mechanism, a connecting seat, a small bevel gear shaft, drive wheels, and a gearbox as described in any one of claims 1 to 4. The direct-drive frame is mounted on one side of the lower part of the gearbox body. The direct-drive engine is mounted on the direct-drive frame, and its output end is connected to the direct-drive clutch mechanism via a connecting seat. The small bevel gear shaft of the direct-drive clutch mechanism is supported by bearings on the direct-drive clutch housing of the direct-drive clutch mechanism. One end of the small bevel gear shaft is provided with a small bevel gear. The direct-drive front shaft is provided with a direct-drive front shaft drive gear and a large bevel gear that meshes with the small bevel gear. The large bevel gear drives the direct-drive front shaft, thereby inputting power into the gearbox. Drive wheels are mounted at both ends of the drive shaft. The handrail frame is mounted on the top rear side of the gearbox body. One end of the handrail is fixed to the handrail frame, and the other end is equipped with a clutch handle. The clutch handle is connected to the direct-drive clutch shift fork via a pull rod to control the engagement and disengagement of the direct-drive clutch.

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