Universal agricultural machine chassis auxiliary steering mechanism

Abstract

The utility model discloses a universal agricultural machine chassis auxiliary steering mechanism. The utility model relates to an agricultural machine, which is arranged below a frame between a left front wheel and a right front wheel of the agricultural machine, and comprises a first oil cylinder, a support fixing seat, a connecting rod mechanism, a second oil cylinder and a guide wheel with a built-in hub motor, the support fixing seat is of a crank arm structure, one end of the support fixing seat is rotatably connected with the frame, and a fixing plate I and a fixing plate II are fixed at the tail end of the support fixing seat; the upper end of the first oil cylinder is hinged to the frame, the lower end of the first oil cylinder is rotationally connected with the support fixing base through a support pin shaft II, the connecting rod mechanism comprises a connecting rod I, a connecting rod II, a connecting rod supporting arm I and a connecting rod supporting arm II, one end of the connecting rod supporting arm I is connected with the support pin shaft II, and the connecting rod supporting arm II is hinged to the middle of the support fixing base. The two ends of the connecting rod I are hinged to the connecting rod supporting arm I and the connecting rod supporting arm II respectively, the two ends of the connecting rod II are hinged to the fixing plate I and the connecting rod supporting arm II respectively, the guide wheel is hinged to the fixing plate II through the wheel supporting arm, and the second oil cylinder is hinged to the support fixing base and the wheel supporting arm.

Description

Technical Field

[0001] This utility model relates to a general-purpose agricultural machinery chassis auxiliary steering mechanism, belonging to the field of agricultural machinery technology. Background Technology

[0002] Currently, many agricultural machines, such as harvesting machines, have a large turning radius due to their wide bodies and large wheelbases. When encountering situations where the turning space is limited, turning often requires multiple adjustments, such as moving forward, backward, and turning again, to adjust the vehicle's direction, which affects transportation and harvesting efficiency. Moreover, the driver's workload is high during the turning process. Utility Model Content

[0003] To address the aforementioned deficiencies in the existing technology, this utility model provides a simple structure and a general-purpose agricultural machinery chassis auxiliary steering mechanism that can provide a small turning radius.

[0004] This utility model is achieved through the following technical solution: a general-purpose agricultural machinery chassis auxiliary steering mechanism, characterized in that: it is installed below the frame between the left and right front wheels of the agricultural machinery, and includes a first hydraulic cylinder, a bracket fixing seat, a linkage mechanism, a second hydraulic cylinder, and a guide wheel with a built-in hub motor. The bracket fixing seat is a crank arm structure, and one end of the bracket fixing seat is rotatably connected to the frame through a pin fixedly connected to the frame. The end of the bracket fixing seat is fixed with fixing plate I and fixing plate II. The first hydraulic cylinder is vertically arranged, and the upper end of the first hydraulic cylinder is hinged to the frame. The lower end of the first hydraulic cylinder is rotatable with the cylinder fixing seat on the bracket fixing seat through the bracket pin II. The linkage mechanism includes connecting rod I, connecting rod II, connecting rod support arm I, and connecting rod support arm II. One end of connecting rod support arm I is connected to the bracket pin II. Connecting rod support arm II is hinged to the middle of the bracket fixing seat. Both ends of connecting rod I are hinged to connecting rod support arm I and connecting rod support arm II respectively. Both ends of connecting rod II are hinged to fixing plate I and connecting rod support arm II respectively. The guide wheel is connected to the lower end of the wheel support arm through a U-shaped bracket. The upper end of the wheel support arm is hinged to fixing plate II. The second hydraulic cylinder is located at the end of the bracket fixing seat. One end of the second hydraulic cylinder is hinged to the bracket fixing seat, and the other end of the second hydraulic cylinder is hinged to the wheel support arm.

[0005] In this invention, the guide wheel has a built-in hub motor that provides steering power during steering, including forward and reverse rotation. Linkage I, linkage II, link arm I, and link arm II form a simple linkage mechanism. When the first cylinder extends or retracts, it drives the bracket fixing seat, link arm I, link arm II, link I, and link II to rotate around the bracket pin II, thereby causing the guide wheel to fold upwards or extend downwards. The second cylinder can drive the wheel support arm to fold or extend. In normal vehicle operation, the auxiliary steering mechanism is in a folded state, and the guide wheel is suspended at a certain distance from the ground. When the vehicle needs to turn, under the action of the cylinder, the auxiliary steering mechanism extends downwards, and the guide wheel touches the ground. Then, under the action of the first cylinder, the bracket fixing seat rotates downwards around the bracket pin II, the guide wheel moves downwards, lifting the front of the vehicle body, raising the front tires a certain distance from the ground, and forming a three-wheel steering mode with the rear two wheels. At this time, the vehicle steers under the action of the guide wheel. During the steering process, the vehicle can still maintain effective operation.

[0006] Furthermore, to improve the load capacity of the auxiliary steering mechanism, the support mounting base is a variable cross-section crank arm structure. The variable cross-section crank arm structure has strong load-bearing capacity.

[0007] Furthermore, to improve steering stability, the tire tread width of the guide wheel is 20cm-30cm.

[0008] The beneficial effects of this utility model are: the utility model has a simple structure, can achieve a small turning radius, can provide a small turning radius when the turning space is limited, can achieve rapid turning, and can provide the minimum turning radius without stopping the operation, which can improve work efficiency, save time, and reduce the driver's operating intensity. Attached Figure Description

[0009] Figure 1 This is an installation diagram of this utility model;

[0010] Figure 2 This is a schematic diagram of the auxiliary steering mechanism in this utility model (extended state);

[0011] Figure 3 This is a diagram showing the auxiliary steering mechanism of this utility model in its fully folded state;

[0012] Figure 4 This is a state diagram of the auxiliary steering mechanism in this utility model during the extension or folding process;

[0013] Figure 5 This is a state diagram of the auxiliary steering mechanism in this utility model in another direction during the extension or folding process;

[0014] In the diagram, 1. Cylinder mounting bracket, 2. First cylinder, 3. Piston rod of the first cylinder, 4. Connecting rod arm I, 5. Bracket pin I, 6. Bracket mounting seat, 7. Wheel support arm, 8. Connecting rod II, 9. Connecting rod arm II, 10. Piston rod of the second cylinder, 11. Second cylinder, 12. Connecting rod I, 13. Bracket pin II, 14. Fixing plate I, 15. Fixing plate II, 16. VCU vehicle controller, 17. Motor controller, 18. Guide wheel, 19. Wheel axle, 20. Hub motor, 21. U-shaped bracket, 22. Support, 23. Cylinder mounting seat, 24. Auxiliary steering mechanism. Detailed Implementation

[0015] The present invention will be further described below through non-limiting embodiments and in conjunction with the accompanying drawings:

[0016] As shown in the attached diagram, a general-purpose agricultural machinery chassis auxiliary steering mechanism is installed below the frame between the left and right front wheels of the agricultural machinery. It includes a first hydraulic cylinder 2, a bracket fixing seat 6, a linkage mechanism, a second hydraulic cylinder 11, and a guide wheel 18 with a built-in hub motor 20. The bracket fixing seat 6 is a crank arm structure. One end of the bracket fixing seat 6 is rotatably connected to the frame via a bracket pin I5, which is fixedly connected to the frame. The end of the bracket fixing seat 6 is fixed with fixing plates I14 and II15. The first hydraulic cylinder 2 is vertically arranged. The upper end of the first hydraulic cylinder 2 is hinged to the frame via a cylinder fixing bracket 1, which is connected to the frame. The lower end of the first hydraulic cylinder 2 is rotatably connected to a cylinder fixing seat 23 on the bracket fixing seat 6 via a bracket pin II13. The linkage mechanism includes connecting rod I12, connecting rod II8, connecting rod support arm I4, and connecting rod support arm II9. One end of connecting rod support arm I4 is connected to the bracket pin II13, and one end of connecting rod support arm II9 is ​​hinged to the middle of the bracket fixing seat 6. The two ends of connecting rod I12 are respectively hinged to connecting rod support arm I4 and connecting rod support arm II9 via pins. The two ends of connecting rod II8 are respectively hinged to fixing plate I14 and connecting rod support arm II9 via pins. Connecting rod I12, connecting rod II8, connecting rod support arm I4, and connecting rod support arm II9 form a simple linkage mechanism. The guide wheel 18 has a built-in hub motor 20. The guide wheel 18 is rotatably connected to the U-shaped bracket 21 via axle 19. The U-shaped bracket 21 is connected to the lower end of the wheel support arm 7 via a support 22. The upper end of the wheel support arm 7 is hinged to the fixing plate II15 via a pin. The hub motor is connected to the motor controller 17, and the motor controller 17 is connected to the VCU vehicle controller 16. The second hydraulic cylinder 11 is located at the end of the bracket mounting base 6. One end of the second hydraulic cylinder 11 is hinged to the bracket fixed on the bracket mounting base 6 via a pin, and the other end of the second hydraulic cylinder 11 is hinged to the wheel support arm 7.

[0017] To improve the load capacity of the auxiliary steering mechanism, preferably, the bracket fixing seat 6 is a variable cross-section crank arm structure. The variable cross-section crank arm structure has strong load-bearing capacity.

[0018] To improve steering stability, preferably, the tire tread width of the guide wheel 18 is 20cm-30cm.

[0019] This invention can be applied to general agricultural machinery chassis, such as harvesting machinery, and can also be used in transport vehicles, such as transport vehicles with self-loading and unloading functions.

[0020] The working principle of this utility model is as follows:

[0021] The guide wheel 18 has a built-in hub motor 20, which provides steering power during steering, including forward and reverse rotation, and also has a reverse drag braking function. The first cylinder 2 starts working from its initial state, and through connecting rod support arm I 4, connecting rod support arm II 9, and connecting rod via a pin, it can perform a semi-rotation around the bracket pin II 13 on the first cylinder, thereby driving the guide wheel to fold upwards or extend downwards. In the normal vehicle state, the first cylinder 2 and the second cylinder 11 are in a compressed state, the auxiliary steering mechanism is in a folded state, and the guide wheel 18 is at a certain distance from the ground, in a suspended state. At this time, the guide wheel 18 will not function when the vehicle is turning. When the vehicle needs to turn, the piston rod 3 of the first cylinder 2 extends downward, triggering a linkage mechanism. The auxiliary steering mechanism extends downward, and the guide wheel 18 touches the ground. At this time, the guide wheel 18 and the vehicle's two rear wheels are on the same horizontal plane and touch the ground simultaneously. Then, the first cylinder is activated, and its piston rod extends downward. The bracket fixing seat rotates downward around the bracket pin II, and the guide wheel 18 moves downward, lifting the front of the vehicle body. The front tires are off the ground by a certain distance, and the guide wheel and the two rear wheels form a three-wheel steering mode. At this time, the vehicle turns under the action of the guide wheel, achieving overall steering. During the steering process, the vehicle can still maintain effective operation.

[0022] This utility model has a simple structure and can achieve a small turning radius. It can provide the minimum turning radius without stopping self-loading, unloading or harvesting operations, and can achieve rapid turning in situations where the turning space is limited. It can improve harvesting efficiency, save time, and reduce the operating intensity of the driver.

[0023] The other parts in this embodiment are all existing technologies and will not be described in detail here.

Claims

1. A universal farm machine chassis auxiliary steering mechanism, characterized by: The device is arranged below the frame between the left and right front wheels of the agricultural machine, and comprises a first oil cylinder (2), a bracket fixing seat (6), a connecting rod mechanism, a second oil cylinder (11), a guide wheel (18) with a built-in hub motor (20), the bracket fixing seat (6) is a crank structure, one end of the bracket fixing seat (6) is rotatably connected with the frame through a pin shaft fixedly connected with the frame, the end of the bracket fixing seat (6) is fixed with a fixed plate I (14) and a fixed plate II (15), the first oil cylinder (2) is vertically arranged, the upper end of the first oil cylinder (2) is hingedly connected with the frame, the lower end of the first oil cylinder (2) is rotatably connected with the oil cylinder fixing seat on the bracket fixing seat (6) through a bracket pin shaft II (13), the connecting rod mechanism comprises a connecting rod I (12), a connecting rod II (8), a connecting rod arm I (4) and a connecting rod arm II (9), one end of the connecting rod arm I (4) is connected with the bracket pin shaft II (13), the connecting rod arm II (9) is hingedly connected in the middle of the bracket fixing seat (6), both ends of the connecting rod I (12) are hingedly connected with the connecting rod arm I (4) and the connecting rod arm II (9) respectively, both ends of the connecting rod II (8) are hingedly connected with the fixed plate I (14) and the connecting rod arm II (9) respectively, the guide wheel (18) is connected with the lower end of a wheel arm (7) through a U-shaped bracket (21), the upper end of the wheel arm (7) is hingedly connected with the fixed plate II (15), the second oil cylinder (11) is arranged at the end of the bracket fixing seat (6), one end of the second oil cylinder (11) is hingedly connected with the bracket fixing seat (6), and the other end of the second oil cylinder (11) is hingedly connected with the wheel arm (7).

2. The universal agricultural chassis auxiliary steering mechanism of claim 1, wherein: The bracket fixing seat (6) is a variable cross-section crank structure.

3. The universal agricultural chassis auxiliary steering mechanism of claim 1 or 2, wherein: The tire tread width of the guide wheel (18) is 20-30 cm.

Images