Riding type four-wheel-drive mini-tiller

Abstract

The utility model provides a riding type four-wheel-drive mini-tiller. The riding type four-wheel-drive mini-tiller solves the problem that according to an existing four-wheel-drive mini-tiller, a rear gear shifting rod is arranged on a rear box, and operation is inconvenient. The riding type four-wheel-drive mini-tiller comprises a frame, a power assembly arranged on the frame, a main gearbox, an auxiliary gearbox fixedly connected with the main gearbox, and a rear box which is hinged to the frame through a hinge structure and can rotate in the horizontal direction relative to the frame. A front gear shifting rod used for driving the front speed changing assembly to shift gears is arranged on the main gearbox, a rear speed changing assembly is arranged in the auxiliary gearbox, a rear gear shifting rod used for driving the rear speed changing assembly to shift gears is arranged on the auxiliary gearbox, and the rear gear shifting rod is located in front of the hinge structure. And the rear shift lever is arranged in front of the seat, so that the rear shift lever is not influenced by the seat, and the operation of a driver is facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of micro-tiller technology and relates to a ride-on four-wheel drive micro-tiller. Background Technology

[0002] Mini tillers are characterized by their light weight, small size, and simple structure, making them widely applicable to dry land, paddy fields, and orchards in plains, mountains, and hills. The main users of mini tillers are farmers, and they are frequently used in mountainous and hilly areas. Therefore, a balance between low price, light weight, and small size is essential, leading to the predominance of walk-behind mini tillers. However, this type of mini tiller requires a higher level of skill from the operator and is relatively more difficult to operate. During tilling, the operator must maintain a steady grip on the handle and apply downward force. Turning also requires operation via the handle, resulting in a very high level of physical exertion for the operator.

[0003] To this end, a Chinese patent discloses a four-wheeled micro-tiller [application publication number CN 115709642A], which includes a powertrain, a front gearbox, a rear gearbox, a front axle, and a rear axle. The powertrain is connected to the front gearbox, and the front gearbox is connected to the rear gearbox via a steering transmission. A hinged connection is provided between the housing of the rear gearbox and the housing of the front gearbox. The rear gearbox can swing horizontally relative to the front gearbox. The power output of the front gearbox drives the front axle, and the power output of the rear gearbox drives the rear axle. The front gearbox includes a reverse gear, a neutral gear, and at least two forward gears, and the rear gearbox includes a reverse gear, a neutral gear, a tillage gear, and a drive gear.

[0004] The aforementioned tillage equipment controls the gear selection of the rear gearbox via a rear shift lever. Due to the influence of the tiller's seat, the rear shift lever is usually extended in front of the seat, which results in a long rear shift lever and inflexible operation. When the tiller turns, the position of the rear shift lever relative to the tiller frame / front gearbox changes, which is not conducive to the driver's operation. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a ride-on four-wheel drive micro-tiller with flexible gear shifting operation.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A ride-on four-wheel drive mini-tiller includes a frame, a powertrain mounted on the frame, a main gearbox, a secondary gearbox fixedly connected to the main gearbox, and a rear box hinged to the frame via a hinge structure and capable of rotating horizontally relative to the frame. The main gearbox contains a front transmission assembly, and a front shift lever for driving the front transmission assembly to shift gears is located on the main gearbox. The secondary gearbox contains a rear transmission assembly, and a rear shift lever for driving the rear transmission assembly to shift gears is located on the secondary gearbox. The rear shift lever is located in front of the hinge structure.

[0008] The main gearbox drives the front axle of the tiller, and the rear gearbox drives the rear axle. The wheelbase between the front and rear axles is 600-1200mm. Both axles are hexagonal solid shafts with opposite sides measuring 23mm-32mm. The front transmission provides reverse, neutral, and at least two forward gears, while the rear transmission provides reverse, neutral, tilling, and drive gears. The main and auxiliary gearboxes can work together to switch between multiple four-wheel drive modes, multiple four-wheel drive tilling modes, or multiple two-wheel drive modes.

[0009] In the aforementioned four-wheel drive mini-tiller, the front gear shift assembly includes a power input shaft, a main output shaft, and a main reverse gear shaft located within the main gearbox. The main output shaft is connected to the main reverse gear shaft via a first gear set. The power input shaft is equipped with a main multi-gear driven by a front shift lever. The main output shaft is also equipped with at least two first gears, and the main reverse gear shaft is also equipped with a second gear. The main multi-gear selectively meshes with the first gears and the second gear.

[0010] The main multi-gear is slidably mounted on the power input shaft. Operating the forward shift lever causes the main multi-gear to slide on the power input shaft. When the main multi-gear meshes with the first gear, the power input shaft drives the main output shaft to rotate, achieving forward gear output. When the main multi-gear meshes with the second gear, the power input shaft drives the main reverse gear shaft to rotate, which in turn drives the main output shaft to rotate, achieving reverse gear output. When the main multi-gear is not engaged, the main output shaft is in neutral. The front axle and the rear transmission assembly are both connected to the main output shaft.

[0011] In the aforementioned four-wheel drive mini-tiller, the rear transmission assembly includes a secondary input shaft, a secondary output shaft, a secondary reverse gear shaft, and a secondary intermediate shaft. The secondary input shaft is connected to the power input shaft via a second gear set, and is connected to the secondary intermediate shaft via a third gear set. The secondary reverse gear shaft is connected to the secondary intermediate shaft via a fourth gear set. The secondary intermediate shaft is also provided with at least two third gears, and the secondary reverse gear shaft is also provided with a fourth gear. The secondary output shaft is provided with a secondary multi-gear driven by the rear shift lever, and the secondary multi-gear selectively meshes with the third and fourth gears.

[0012] The secondary multi-gear is slidably mounted on the secondary output shaft. When the shift lever is operated, it drives the secondary multi-gear to slide on the secondary output shaft. When the secondary multi-gear meshes with the third gear, the secondary input shaft drives the secondary intermediate shaft to rotate, which in turn drives the secondary input shaft to achieve forward gear output. When the secondary multi-gear meshes with the fourth gear, the secondary input shaft drives the secondary intermediate shaft to rotate, which in turn drives the secondary reverse gear shaft to rotate, which in turn drives the secondary output shaft to achieve reverse gear output.

[0013] In the aforementioned four-wheel drive mini-tiller, the rear transmission assembly also includes a secondary intermediate shaft 2, which is connected to the front output shaft via a fifth gear set. The secondary intermediate shaft is also equipped with a fifth gear, and the secondary multi-gear selectively meshes with the third, fourth, and fifth gears.

[0014] When the secondary multi-gear meshes with the fifth gear, the front output shaft drives the secondary intermediate shaft two to rotate, and the secondary intermediate shaft two drives the secondary output shaft to rotate to achieve the tillage gear output.

[0015] In the aforementioned four-wheel drive mini-tiller, the hinge structure includes a first rotating shaft that is vertically inserted into the frame. A first bearing and a second bearing are provided between the first rotating shaft and the frame. The rear box is connected to the first rotating shaft, and the connection point is located between the first bearing and the second bearing.

[0016] In the aforementioned four-wheel drive mini-tiller, the second bearing is a self-aligning bearing.

[0017] In the above-mentioned four-wheel drive mini-tiller, the auxiliary gearbox is provided with a connecting plate, and a second rotating shaft is provided inside the connecting plate, which is coaxially arranged with the first rotating shaft. The rear box is provided with a connecting frame for installing a seat, and the connecting frame is rotatably engaged with the second rotating shaft.

[0018] In the aforementioned four-wheel drive mini-tiller, the front box is provided with an oblique output shaft that is drivenly connected to the front output shaft, and the oblique output shaft is drivenly connected to the front wheel axle; the rear box is provided with a vertical output shaft that is drivenly connected to the auxiliary output shaft through a steering transmission component, and the vertical output shaft is drivenly connected to the rear wheel axle.

[0019] In the aforementioned four-wheel drive mini-tiller, the steering transmission component includes a drive shaft, a first universal joint is provided between the front end of the drive shaft and the auxiliary output shaft, a rear input shaft is provided on the rear box and is connected to the vertical output shaft, and a second universal joint is provided between the rear end of the drive shaft and the rear input shaft.

[0020] In the aforementioned four-wheel drive mini-tiller, a pedal is provided on the frame, and a clutch control structure is provided above the pedal. The clutch control structure includes a foot pedal rod with one end rotatably mounted on the frame, a rotating plate with one end fixedly connected to the shift fork shaft that controls the mini-tiller's clutch, and an operating handle on the mini-tiller. The operating handle is connected to the rotating plate via a traction cable. When the operating handle is closed, the traction cable can drive the rotating plate to swing around the shift fork shaft. A foot pedal is provided on the foot pedal rod, and the foot pedal rod and the rotating plate are connected by a flexible connecting component. When the foot pedal is pressed, the flexible connecting component can drive the rotating plate to swing around the shift fork shaft.

[0021] In the aforementioned four-wheel drive mini-tiller, the flexible connection assembly includes a conical spring and a pull cable. The large end of the conical spring is connected to the foot pedal, and the end of the pull cable away from the conical spring is connected to the rotating plate. The end of the pull cable near the conical spring has a limiting head, which is located inside the conical spring and limited by the small end of the conical spring.

[0022] Compared with existing technologies, this ride-on four-wheel drive mini-tiller has the following advantages: Since the rear gearbox assembly for controlling the rear axle shifting is located in the auxiliary gearbox in front of the seat, and the rear shift lever is also located in front of the seat, the rear shift lever is not affected by the seat, making it convenient for the driver to operate. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the result of the four-wheel drive mini-tiller provided by this utility model.

[0024] Figure 2 This is a cross-sectional view of the main gearbox and the auxiliary gearbox provided by this utility model.

[0025] Figure 3 This is a cross-sectional view of the hinge structure provided by this utility model.

[0026] Figure 4 This is a schematic diagram of the clutch control structure provided by this utility model.

[0027] In the diagram: 1. Frame; 2. Powertrain; 3. Main gearbox; 4. Auxiliary gearbox; 5. Rear box; 6. Front shift lever; 7. Rear shift lever; 8. Power input shaft; 9. Main output shaft; 10. Main multi-gear; 11. Auxiliary input shaft; 12. Auxiliary output shaft; 13. Auxiliary intermediate shaft one; 14. Auxiliary multi-gear; 15. Auxiliary intermediate shaft two; 16. First shaft; 17. First bearing; 18. Second bearing; 19. Connecting plate; 20. Second shaft; 21. Connecting frame; 22. Seat; 23. Front axle; 24. Rear axle; 25. First universal joint; 26. Second universal joint; 27. Foot pedal; 28. Shift fork shaft; 29. ​​Rotating plate; 30. Operating handle; 31. Traction cable; 32. Foot pedal; 33. Conical spring; 34. Cable. Detailed Implementation

[0028] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0029] like Figure 1 The illustrated four-wheel drive mini-tiller includes a frame 1, a powertrain 2 mounted on the frame 1, a main gearbox 3, a secondary gearbox 4 fixedly connected to the main gearbox 3, and a rear box 5 hinged to the frame 1 and rotatable horizontally relative to the frame 1. The front box contains a slanted output shaft connected to the front output shaft, with its lower end connected to the front axle 23. The rear box 5 contains a vertical output shaft, the lower end of which is connected to the rear axle 24. Wheels or tillage blades can be mounted on the front and rear axles 23 as needed. The wheels have steering wheel axles that can be fitted onto the front and rear axles 23 and 24. The steering wheel axles are coaxial with the wheels and are sleeve-shaped.

[0030] The wheelbase between the front axle 23 and the rear axle 24 is 600-1200mm, such as Figure 1 As shown, the front wheel axle 23 and the rear wheel axle 24 are hexagonal solid axles with a side dimension of 23mm to 32mm. The steering wheel axle has a hexagonal hole for mating with the hexagonal solid axle. During installation, the steering wheel axle on the travel wheel is fitted onto the front wheel axle 23 / rear wheel axle 24, and then locked in place using locking bolts / pin connections.

[0031] like Figure 1 As shown, the main gearbox 3 is equipped with a front transmission assembly, and the front shift lever 6 for driving the front transmission assembly to shift gears is located on the main gearbox 3. The auxiliary gearbox 4 is equipped with a rear transmission assembly, and the rear shift lever 7 for driving the rear transmission assembly to shift gears is located on the auxiliary gearbox 4. The rear shift lever 7 is located in front of the hinge structure.

[0032] The power output of the main gearbox 3 drives the front wheel axle 23 of the tiller, and the power output of the rear box 5 drives the rear wheel axle 24 of the tiller. Under the action of the front transmission assembly, the front wheel axle 23 has reverse gear, neutral gear and at least two forward gears. Under the action of the rear transmission assembly, the rear wheel axle 24 has reverse gear, neutral gear, tillage gear and driving gear. The main gearbox 3 and the auxiliary gearbox 4 can cooperate to switch to multi-gear four-wheel drive driving mode, multiple four-wheel drive tillage modes or multi-gear two-wheel drive driving mode.

[0033] like Figure 2 As shown, the front shift assembly includes a power input shaft 8, a main output shaft 9, and a main reverse gear shaft located within the main gearbox 3. The main output shaft 9 is connected to the main reverse gear shaft via a first gear set. The power input shaft 8 is equipped with a main multi-gear 10 driven by the front shift lever 6. The main multi-gear 10 is a three-gear set. The main output shaft 9 is also equipped with two first gears, and the main reverse gear shaft is also equipped with a second gear. The main multi-gear 10 selectively meshes with one of the two first gears and the second gear, or does not mesh with either of the first gears or the second gear.

[0034] The main multi-gear 10 is slidably mounted on the power input shaft 8. When the front shift lever 6 is operated, the main multi-gear 10 can slide on the power input shaft 8. When the main multi-gear 10 meshes with the first gear, the power input shaft 8 drives the main output shaft 9 to rotate, achieving forward gear output. When the main multi-gear 10 meshes with the second gear, the power input shaft 8 drives the main reverse gear shaft to rotate, which in turn drives the main output shaft 9 to rotate, achieving reverse gear output. When the main multi-gear 10 is not engaged, the main output shaft 9 is in neutral. The front wheel axle 23 is connected to the main output shaft 9, and the rear transmission assembly is also connected to the main output shaft 9.

[0035] like Figure 2 As shown, the rear transmission assembly includes a secondary input shaft 11, a secondary output shaft 12, a secondary reverse gear shaft, and a secondary intermediate shaft 13. The secondary input shaft 11 is connected to the power input shaft 8 via a second gear set. The secondary input shaft 11 is connected to the secondary intermediate shaft 13 via a third gear set. The secondary reverse gear shaft is connected to the secondary intermediate shaft 13 via a fourth gear set. The secondary intermediate shaft 13 is also equipped with two third gears, and the secondary reverse gear shaft is also equipped with a fourth gear. The secondary output shaft 12 is equipped with a secondary multi-gear 14 driven by the rear shift lever 7. The secondary multi-gear 14 is a four-gear assembly. The secondary multi-gear 14 selectively engages with one of the two third gears and the fourth gear, or does not engage with either of the three third gears or the fourth gear. The vertical output shaft is connected to the secondary output shaft 12 via a steering transmission component.

[0036] The secondary multi-gear 14 is slidably mounted on the secondary output shaft 12. When the shift lever 7 is operated, the secondary multi-gear 14 can slide on the secondary output shaft 12. When the secondary multi-gear 14 meshes with the third gear, the secondary input shaft 11 drives the secondary intermediate shaft 13 to rotate, and the secondary intermediate shaft 13 drives the secondary input shaft 11 to rotate, thus achieving forward gear output. When the secondary multi-gear 14 meshes with the fourth gear, the secondary input shaft 11 drives the secondary intermediate shaft 13 to rotate, and the secondary intermediate shaft 13 drives the secondary reverse gear shaft to rotate, and the secondary reverse gear shaft drives the secondary output shaft 12 to rotate, thus achieving reverse gear output.

[0037] like Figure 2 As shown, the rear transmission assembly also includes a secondary intermediate shaft 15, which is connected to the front output shaft via a fifth gear set. A fifth gear is also mounted on the secondary intermediate shaft. The secondary multi-gear 14 selectively meshes with one of the three gears (third, fourth, and fifth), or does not mesh with any of them. When the secondary multi-gear 14 meshes with the fifth gear, the front output shaft drives the secondary intermediate shaft 15 to rotate, which in turn drives the secondary output shaft 12 to rotate, thus achieving the tillage gear output.

[0038] like Figure 3 As shown, the hinge structure includes a first pivot 16 vertically inserted into the frame 1. A first bearing 17 and a second bearing 18 are provided between the first pivot 16 and the frame 1. The rear box 5 is connected to the first pivot 16, and the connection point is located between the first bearing 17 and the second bearing 18. The second bearing 18 is a self-aligning bearing.

[0039] like Figure 3 As shown, a connecting plate 19 is provided on the auxiliary gearbox 4, and a second rotating shaft 20 coaxially arranged with the first rotating shaft 16 is provided inside the connecting plate 19. A connecting bracket 21 for installing the seat 22 is provided on the rear box 5, and the connecting bracket 21 is rotatably engaged with the second rotating shaft 20.

[0040] like Figure 1 As shown, the steering transmission component includes a drive shaft, a first universal joint 25 is provided between the front end of the drive shaft and the auxiliary output shaft 12, a rear input shaft is provided on the rear box 5 and is connected to the vertical output shaft, and a second universal joint 26 is provided between the rear end of the drive shaft and the rear input shaft.

[0041] A pedal is provided on the frame 1, and a clutch control mechanism is provided above the pedal.

[0042] like Figure 4As shown, the clutch control structure includes a foot pedal 27 rotatably mounted on the frame 1, a rotating plate 29 fixedly connected to the shift fork shaft 28 that controls the micro-tiller clutch at one end, and an operating handle 30 mounted on the micro-tiller. The operating handle 30 is connected to the rotating plate 29 via a traction cable 31. When the operating handle 30 is closed, the traction cable 31 can drive the rotating plate 29 to swing around the shift fork shaft 28. The foot pedal 27 is equipped with a foot pedal 32. The foot pedal 27 and the rotating plate 29 are connected by a flexible connecting component. When the foot pedal 32 is pressed, the flexible connecting component can drive the rotating plate 29 to swing around the shift fork shaft 28.

[0043] like Figure 4 As shown, the flexible connection assembly includes a conical spring 33 and a pull cable 34. The large end of the conical spring 33 is connected to the foot pedal 27, and the end of the pull cable 34 away from the conical spring 33 is connected to the rotating plate 29. The end of the pull cable 34 near the conical spring 33 has a limiting head, which is located inside the conical spring 33 and is limited by the small end of the conical spring 33.

[0044] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A ride-on four-wheel drive mini-tiller characterized by comprising: The utility model relates to a kind of vehicle, including frame (1), be arranged on the power assembly (2) of frame (1), main gearbox (3), with the auxiliary gearbox (4) of main gearbox (3) fixed connection, and the rear box (5) of being articulated in hinge structure and being articulated on frame (1) and can be rotated in horizontal direction relative to frame (1), the front gear shift component is equipped in main gearbox (3), for driving front gear shift component gear shift front shift lever (6) is equipped on main gearbox (3), the rear gear shift component is equipped in auxiliary gearbox (4), for driving rear gear shift component gear shift rear shift lever (7) is equipped on auxiliary gearbox (4), rear shift lever (7) is located in hinge structure front.

2. The ride-on four-wheel drive mini-tiller of claim 1, wherein, The front gear shift component includes power input shaft (8) arranged in main gearbox (3), main output shaft (9) and main reverse shaft, the main output shaft (9) is connected with main reverse shaft by first gear set, the main output shaft (9) is equipped with at least two first gears, the main reverse shaft is further equipped with second gear, the main multi-connection gear (10) is selectively engaged with first gear and second gear.

3. The ride-on four-wheel drive mini-tiller of claim 2, wherein, The rear gear shift component includes auxiliary input shaft (11), auxiliary output shaft (12), auxiliary reverse shaft and auxiliary intermediate shaft one (13), the auxiliary input shaft (11) is connected with power input shaft (8) by second gear set, the auxiliary input shaft (11) is connected with auxiliary intermediate shaft one (13) by third gear set, the auxiliary reverse shaft is connected with auxiliary intermediate shaft one (13) by fourth gear set, the auxiliary intermediate shaft one (13) is further equipped with at least two third gears, the auxiliary reverse shaft is further equipped with fourth gear, the auxiliary output shaft (12) is equipped with auxiliary multi-connection gear (14) by rear shift lever (7), the auxiliary multi-connection gear (14) is selectively engaged with third gear and fourth gear.

4. The ride-on four-wheel drive mini-tiller of claim 3, wherein, The rear gear shift component further includes auxiliary intermediate shaft two (15), the auxiliary intermediate shaft two (15) is connected with main output shaft (9) by fifth gear set, the auxiliary intermediate shaft two (15) is further equipped with fifth gear, the auxiliary multi-connection gear (14) is selectively engaged with third gear, fourth gear and fifth gear.

5. The ride-on four-wheel drive mini-tiller of claim 1, wherein, The hinge structure includes first rotating shaft (16) vertically penetrating in frame (1), first bearing (17) and second bearing (18) are equipped between first rotating shaft (16) and frame (1), the rear box (5) is connected with first rotating shaft (16) and connecting point is located between first bearing (17) and second bearing (18).

6. The ride-on four-wheel drive mini-tiller of claim 5, wherein, The auxiliary gearbox (4) is equipped with connecting plate (19), the second rotating shaft (20) coaxially arranged with first rotating shaft (16) is equipped in connecting plate (19), the connecting frame (21) for installing seat (22) is equipped on the rear box (5), the connecting frame (21) is rotationally cooperated with second rotating shaft (20).

7. The ride-on four-wheel drive mini-tiller of claim 1, wherein, The main gearbox (3) is provided with a slant output shaft connected with the main output shaft (9), and the slant output shaft is connected with the front wheel shaft; the rear box (5) is provided with a vertical output shaft connected with the auxiliary output shaft (12) through a steering transmission member, and the vertical output shaft is connected with the rear wheel shaft.

8. The ride-on four-wheel drive mini-tiller of claim 7, wherein, The steering transmission member comprises a transmission shaft, and a first universal transmission joint (25) is arranged between the front end of the transmission shaft and the auxiliary output shaft (12); the rear box (5) is provided with a rear input shaft connected with the vertical output shaft, and a second universal transmission joint (26) is arranged between the rear end of the transmission shaft and the rear input shaft.

9. The ride-on four-wheel drive mini-tiller of claim 1, wherein, The frame (1) is provided with a pedal, and a clutch control structure is arranged above the pedal; the clutch control structure comprises a pedal lever (27) rotatably arranged on the frame (1), a rotating plate (29) having one end fixedly connected with a shift fork shaft (28) for controlling the clutch of the micro tiller, and an operation handle (30) arranged on the micro tiller; the operation handle (30) is connected with the rotating plate (29) through a traction cable (31), and the traction cable (31) can drive the rotating plate (29) to swing around the shift fork shaft (28) when the operation handle (30) is closed; the pedal lever (27) is provided with a pedal plate (32), and the pedal lever (27) and the rotating plate (29) are connected through a flexible connecting assembly; when the pedal plate (32) is stepped on, the flexible connecting assembly can drive the rotating plate (29) to swing around the shift fork shaft (28).

10. The ride-on four-wheel drive mini-tiller of claim 9, wherein, The flexible connecting assembly comprises a conical spring (33) and a pull wire (34); the large end of the conical spring (33) is connected with the pedal lever (27), one end of the pull wire (34) away from the conical spring (33) is connected with the rotating plate (29), and the other end of the pull wire (34) close to the conical spring (33) is provided with a limiting head; the limiting head is located in the conical spring (33) and is limited by the small end of the conical spring (33).

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