Agricultural machine walking wheel driving mechanism

Abstract

Agricultural machinery walking wheel drive mechanism relates to agricultural machinery technology field, wheel bracket (2) is hinged with frame (3) through hinged transmission shaft (4), angle adjusting device (5) is connected between wheel bracket (2) and frame (3) and can change the included angle of both, the axle (6) of walking wheel (1) drives hinged transmission shaft (4) through chain wheel and chain, hinged transmission shaft (4) is equipped with the output chain wheel (7) of free rotation, hinged transmission shaft (4) is driven with output chain wheel (7) through ratchet clutch device (8).It is suitable for large-scale traction type agricultural machinery equipment, and the power connection of agricultural machinery and walking wheel is disconnected when driving on the road, so that walking wheel only plays the role of weight bearing, and shares the weight of equipment.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and specifically to an agricultural machinery drive mechanism using walking wheels. Background Technology

[0002] In agricultural production, many devices such as sowing, fertilizing, and pesticide spraying rely on ground wheels for propulsion. Currently, agricultural machinery using ground wheel drives is generally small, employing a hitch-on structure. When traveling on roads, the machinery is raised and carried behind the towing vehicle via a suspension system, with the ground wheels also raised and no longer in contact with the ground, thus stopping the machinery's rotation. This reduces the traction load and energy consumption when traveling on roads. During field operations, the machinery is lowered, allowing the ground wheels to contact the ground. The towing vehicle then pulls the machinery, causing the wheels to rotate due to friction with the field, providing propulsion. However, for larger and heavier machinery, the hitch-on structure can shift the center of gravity rearward, potentially causing the front of the machine to lift up and preventing normal operation. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an agricultural machinery walking wheel drive mechanism that uses walking wheels to provide power to the agricultural machinery. The mechanism connects with the agricultural machinery in the working mode and cuts off the power output to the agricultural machinery in the driving mode, thereby realizing the free switching between working and driving modes.

[0004] The technical solution of this utility model is: a driving mechanism for agricultural machinery walking wheels, including walking wheels, wheel frames, and a frame. The wheel frame is hinged to the frame via a hinged drive shaft. An angle adjustment device that can change the included angle between the wheel frame and the frame is provided. The axle of the walking wheel drives the hinged drive shaft via a sprocket and a chain. The hinged drive shaft is provided with a freely rotatable output sprocket. The hinged drive shaft is driven by the output sprocket through a ratchet clutch device. The ratchet clutch device includes an active ratchet group and a passive ratchet group sleeved on the hinged drive shaft. Each of the active and passive ratchet groups has a ratchet connected by a bushing. The assembly consists of a sliding component that can only slide along the hinged drive shaft. The passive ratchet on this sliding component is fixedly connected to the bushing, while the active ratchet is rotatably connected to the bushing. The active ratchet has an outwardly flared fork-shaped portion that is slidably connected to a guide rod via a groove. The guide rod is fixed to the frame and parallel to the hinged drive shaft. The other ratchet of the active ratchet assembly is sleeved on the bushing and fixedly connected to the wheel frame. The other ratchet of the passive ratchet assembly is fixedly connected to the output sprocket. A spring is sleeved on the hinged drive shaft to keep the two ratchet assemblies in a meshing state. When the angle between the frame and the wheel frame increases, the passive ratchet assembly is driven to separate by the active ratchet.

[0005] The technical advantages of this invention are: it is suitable for use in large-scale traction agricultural machinery. When traveling on roads, the power connection between the machinery and the wheels is disconnected, allowing the wheels to only bear the load and distribute the weight of the equipment. During field operations, the wheels are connected to drive the machinery. The clutch mechanism uses a ratchet clutch controlled by a hydraulic cylinder, making it simple and convenient to operate. When the power to the wheels is disconnected, the hydraulic cylinder pushes down the wheel frame, lifting the frame hinged to it and raising the working unit connected to the frame away from the ground to prevent collisions. The transmission device features a multi-stage sprocket speed-changing structure, providing different operating speeds to better meet various operational needs. Attached Figure Description

[0006] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective; Figure 3 This is a schematic diagram of the ratchet clutch device of this utility model; Figure 4 This is a three-dimensional structural diagram of the sliding component of this utility model; Figure 5 This is a three-dimensional structural diagram of the speed change device of this utility model. Detailed Implementation

[0007] like Figures 1 to 5As shown, a walking wheel drive mechanism for agricultural machinery includes a walking wheel 1, a wheel frame 2, and a frame 3. The wheel frame 2 is hinged to the frame 3 via a hinged drive shaft 4. An angle adjustment device 5, which can change the included angle between the wheel frame 2 and the frame 3, is provided between them. The axle 6 of the walking wheel 1 drives the hinged drive shaft 4 via a sprocket and a chain. The hinged drive shaft 4 is equipped with a freely rotatable output sprocket 7. The hinged drive shaft 4 is driven by the output sprocket 7 via a ratchet clutch device 8. The ratchet clutch device 8 includes an active ratchet group 9 and a passive ratchet group 10 sleeved on the hinged drive shaft 4. Both the active and passive ratchet groups consist of two meshing ratchets, with each group having one ratchet. A sliding component 12, which can only slide along the hinged drive shaft 4, is connected by a bushing 11. The passive ratchet on this sliding component 12 is fixedly connected to the bushing 11, while the active ratchet is rotatably connected to the bushing 11. The active ratchet has an outwardly extending fork-shaped portion 13 that is slidably connected to a guide rod 14 via a groove. The guide rod 14 is fixed to the frame 3 and parallel to the hinged drive shaft 4. Another ratchet of the active ratchet group 9 is sleeved on the bushing 11 and fixedly connected to the wheel frame 2. The other ratchet of the passive ratchet group 10 is fixedly connected to the output sprocket 7. A spring is fitted on the hinged drive shaft 4 to keep the two ratchet groups engaged. When the angle between the frame 3 and the wheel frame 2 increases, the passive ratchet group 10 is driven to disengage by the active ratchet. The output sprocket is connected to the agricultural machinery's actuator via a chain. The teeth of the active ratchet group are slightly larger to ensure that the teeth between the driven ratchets can completely disengage when the sliding component moves. The angle adjustment device actuates, changing the angle between the frame and the wheel frame. When the included angle decreases, both the active and passive ratchet sets mesh together under the pressure of the spring. When the included angle increases, the guide rod fixed to the frame also rotates around the hinged drive shaft relative to the wheel frame. The rotation of the guide rod drives the active ratchet connected to the sliding component to rotate relative to the hinged drive shaft through the fork-shaped part. At the same time, angular displacement also occurs between the two active ratchets. Under the action of the toothed inclined surface, the two active ratchets are forced to move away from each other. The pull of the bushing causes the two passive ratchets to separate, thereby cutting off the power input to the output sprocket.

[0008] The angle adjustment device 5 is a hydraulic cylinder. Alternatively, a lead screw adjustment device can be used for manual adjustment.

[0009] The hinged drive shaft 4 is a hexagonal shaft.

[0010] The frame 3 is equipped with a speed change device and is connected to the output sprocket 7 via a chain.

[0011] The speed change device includes an input shaft 15, a sprocket assembly 16, a swing frame 17, a tension sprocket 18, a speed change output sprocket 19, an output shaft 20, an intermediate wheel 21, and a speed change chain 22. The input shaft 15 is connected to the output sprocket 7 on the hinged transmission shaft 4 via a sprocket and a chain. The sprocket assembly 16 is made of several sprocket pieces arranged in ascending order and fixed together. The sprocket assembly 16 is axially slidable on the input shaft 15. One end of the swing frame 17 is connected to the frame 3 via a hinge shaft, and its free end is twisted away from the sprocket assembly 16 by a spring. The tension sprocket 18 is connected to the free end of the swing frame 17. The variable speed output sprocket 19 is fixed on the output shaft 20. The input shaft 15, output shaft 20, intermediate wheel 21, tension sprocket 18, and the connecting shaft of the swing frame 17 are arranged in parallel. The tower wheel assembly 16 is located on one side, and the tension sprocket 18, variable speed output sprocket 19, and intermediate wheel 21 are located on the other side. The variable speed chain 22 is wound around the tower wheel assembly 16, tension sprocket 18, variable speed output sprocket 19, and intermediate wheel 21, and is wrapped in an "S" shape between the tension sprocket 18, variable speed output sprocket 19, and intermediate wheel 21. Speed ​​change is achieved by connecting the variable speed chain to different sprockets on the tower wheel assembly. When changing speed, the tower wheel assembly can be slid on the input shaft manually, and then the swing frame can be turned to loosen the variable speed chain, and the variable speed chain can be rewound onto the selected sprocket. The rotating shaft on the speed change device also mostly adopts a hexagonal shaft design.

[0012] The swing frame 17 is torn by a torsion spring mounted on its hinge axis.

[0013] The sprocket assembly 16 consists of 3 to 6 sprocket pieces.

Claims

1. An agricultural machine travel wheel drive mechanism comprising a travel wheel (1), a wheel carrier (2) and a machine frame (3), characterized in that, The wheel frame (2) is hinged to the frame (3) via a hinged drive shaft (4). An angle adjustment device (5) is provided between the wheel frame (2) and the frame (3) to change the angle between them. The axle (6) of the traveling wheel (1) drives the hinged drive shaft (4) via a sprocket and a chain. The hinged drive shaft (4) is provided with a freely rotatable output sprocket (7). The hinged drive shaft (4) is driven by the output sprocket (7) via a ratchet clutch device (8). The ratchet clutch device (8) includes an active ratchet group (9) and a passive ratchet group (10) sleeved on the hinged drive shaft (4). Each of the active ratchet group (9) and the passive ratchet group (10) has a ratchet connected by a bushing (11) to form a sliding mechanism that can only slide along the hinged drive shaft (4). The passive ratchet on the sliding component (12) is fixedly connected to the bushing (11), the active ratchet is rotatably connected to the bushing (11), and the active ratchet has an outwardly flared fork-shaped part (13) that is slidably connected to a guide rod (14) through a sliding groove. The guide rod (14) is fixed on the frame (3) and parallel to the hinged drive shaft (4). The other ratchet of the active ratchet group (9) is sleeved on the bushing (11) and fixedly connected to the wheel frame (2). The other ratchet of the passive ratchet group (10) is fixedly connected to the output sprocket (7). A spring is sleeved on the hinged drive shaft (4) to keep the two ratchet groups in a meshing state. When the angle between the frame (3) and the wheel frame (2) increases, the passive ratchet group (10) is driven by the active ratchet and separated.

2. The agricultural walking wheel drive mechanism of claim 1, wherein, The angle adjustment device (5) is a hydraulic cylinder.

3. The agricultural vehicle track wheel drive mechanism of claim 1, wherein, The hinged drive shaft (4) is a hexagonal shaft.

4. The agricultural walking wheel drive mechanism of claim 1, 2, or 3, wherein, The frame (3) is equipped with a speed change device and the output sprocket (7) is connected by a chain.

5. The agricultural vehicle track wheel drive mechanism of claim 4, wherein, The speed change device includes an input shaft (15), a sprocket assembly (16), a swing frame (17), a tension sprocket (18), a speed change output sprocket (19), an output shaft (20), an intermediate wheel (21), and a speed change chain (22). The input shaft (15) is connected to the output sprocket (7) on the hinged transmission shaft (4) via a sprocket and a chain. The sprocket assembly (16) is made of several sprocket pieces arranged in ascending order and fixed together. The sprocket assembly (16) is axially slidably mounted on the input shaft (15). One end of the swing frame (17) is connected to the frame (3) via a hinged shaft, and its free end is twisted away from the sprocket assembly (16) by a spring to tension it. The sprocket (18) is connected to the free end of the swing frame (17), the variable speed output sprocket (19) is fixed on the output shaft (20), the input shaft (15), the output shaft (20), the intermediate wheel (21), the tension sprocket (18) and the connecting shaft of the swing frame (17) are arranged in parallel, the tower wheel group (16) is arranged on one side, the tension sprocket (18), the variable speed output sprocket (19) and the intermediate wheel (21) are arranged on the other side, and the variable speed chain (22) is wound around the tower wheel group (16), the tension sprocket (18), the variable speed output sprocket (19) and the intermediate wheel (21), and is wrapped in an "S" shape between the tension sprocket (18), the variable speed output sprocket (19) and the intermediate wheel (21).

6. The agricultural walking wheel drive mechanism of claim 5, wherein, The swing frame (17) is twisted by a torsion spring arranged on the hinge shaft thereof.

7. The agricultural machinery walking wheel drive mechanism as described in claim 5 or 6, characterized in that, The tower wheel set (16) is composed of 3-6 chain wheel pieces.

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