A wheeled agricultural machinery front and rear wheel tracking control mechanism

Abstract

The present invention provides a wheeled agricultural machinery front and rear wheel tracking control mechanism, comprising a frame, a front axle and a rear axle mounted at the bottom of the frame, a front connecting rod, a front triangular transmission frame, a rear connecting rod, a rear triangular transmission frame, and a straight shaft connecting the front and rear triangular transmission frames. The present invention unifies the steering changes of the independently driven front and rear wheels of the agricultural machinery through the lever principle, thereby avoiding the loss caused by the inconsistent ruts of the front and rear wheels of the agricultural machinery; the present invention has a simple structure and is very convenient to implement.

Description

Technical Field

[0001] The invention relates to the field of agricultural machinery, and in particular to a front and rear wheel tracking control mechanism for a wheeled agricultural machinery. Background Art

[0002] Wheeled agricultural machinery is an important piece of machinery in modern agricultural production. For power and stability reasons, some wheeled agricultural machinery, such as pesticide sprayers, use a non-independent suspension system with the front and rear axles driven separately when operating in the field, and the direction control system is only set on the front axle. When this system is running, since the farmland surface cannot be very flat, if it encounters uneven places and causes a change of direction, when turning, the front wheels are generally controlled to turn, and then the rear wheels are driven by the body of the vehicle to turn. At this time, there is a more serious problem, that is, it is difficult to ensure that the front and rear wheels are in the same rut. Generally speaking, the wheel width of agricultural machinery is set according to the spacing between the ridges of the farmland. If the front and rear wheels are not in the same rut, the rut will become wider, and may even press the ridges, causing losses. Summary of the invention

[0003] The invention provides a wheeled agricultural machine front and rear wheel rut control mechanism, which can ensure that the front and rear wheels of the agricultural machine always remain in the same rut.

[0004] The present invention is achieved through the following technical solutions:

[0005] A wheeled agricultural machinery front and rear wheel tracking control mechanism comprises a frame and a front axle and a rear axle mounted on the bottom of the frame, front guide plates are fixedly arranged on the wheel seats on both sides of the front axle, the front guide plates extend rearward, guide holes are arranged at the tail end, a front connecting rod is arranged between the two front guide plates, and the two ends of the front connecting rod are respectively hinged at the tail end of the two front guide plates; a first hinge point is arranged at a position in the middle of the front connecting rod biased towards a certain front wheel, a first hinge support is fixedly arranged at the bottom of the frame above the first hinge point, and the first hinge point is hinged on the first hinge support; a second hinge point is arranged in the middle of the front connecting rod, a front triangle transmission frame is arranged on the second hinge point, the second hinge point is hinged to one foot of the front triangle transmission frame, the apex of the front triangle transmission frame is hinged to the second hinge support, and the first hinge point is hinged to the second hinge support. Two articulated supports are fixed at the bottom of the frame, and the other leg of the front triangle transmission frame extends to the same side of the first articulated point; rear guide plates are fixedly arranged on the wheel seats on both sides of the rear axle, and the rear guide plates extend forward, and guide holes are arranged at the rear ends, and a rear connecting rod is arranged between the two rear guide plates, and the two ends of the rear connecting rod are respectively hinged at the rear ends of the two rear guide plates; a third articulated point is arranged at a position in the middle of the rear connecting rod biased towards the first articulated point, and the rear triangle transmission frame is arranged on the third articulated point, the third articulated point is articulated with one leg of the rear triangle transmission frame, the apex of the rear triangle transmission frame is articulated on the third articulated support, the third articulated support is fixed at the bottom of the frame, and the other leg of the rear triangle transmission frame extends to the center of the rear connecting rod; the front triangle transmission frame and the rear triangle transmission frame are hingedly connected by a straight axis.

[0006] Furthermore, the front connecting rod includes an adjusting part, which is a hydraulic cylinder. Both ends of the adjusting part are connected to the front guide plate through connectors respectively, the first hinge point coincides with the hole of the cylinder head, and the second hinge point is arranged on the cylinder body.

[0007] Furthermore, the connector is a coupling with adjustable length.

[0008] Furthermore, the first hinge point, the second hinge point, the third hinge point and each hinge point of the front and rear triangular transmission frames are all rotary hinges, and the central axis of each hinge point is in the vertical direction.

[0009] Furthermore, a universal hinge is provided at the hinge between the guide hole and the front guide plate and the rear guide plate.

[0010] Furthermore, the included angles between the front triangular transmission frame and the rear triangular transmission frame are both right angles, and a reinforcing plate is provided between the two legs of the triangular transmission frame.

[0011] Furthermore, connectors are also provided at both ends of the rear connecting rod.

[0012] The invention unifies the steering changes of the independently driven front and rear wheels of the agricultural machinery through the lever principle, thereby avoiding the loss caused by the inconsistent ruts of the front and rear wheels of the agricultural machinery; the invention has a simple structure and is very convenient to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention is a schematic top view of the structure of a front and rear wheel rudder control mechanism for a wheeled agricultural machine according to an embodiment of the present invention.

[0014] The reference numerals are as follows:

[0015] 1. Front guide plate, 2. Front connecting rod, 3. First hinge point, 4. First hinge support, 5. Second hinge point, 6. Front triangular transmission frame, 7. Second hinge support, 8. Rear guide plate, 9. Rear connecting rod, 10. Third hinge point, 11. Rear triangular transmission frame, 12. Wheel seat, 13. Straight shaft, 14. Hydraulic cylinder, 15. Coupling, 16. Front axle, 17. Rear axle. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0017] like Figure 1As shown, a wheeled agricultural machinery front and rear wheel tracking control mechanism comprises a frame and a front axle 16 and a rear axle 17 installed at the bottom of the frame, front guide plates 1 are fixedly arranged on the wheel seats 12 on both sides of the front axle 16, the front guide plate 1 extends backward, and a guide hole is arranged at the tail end, a front connecting rod 2 is arranged between the two front guide plates 1, and the two ends of the front connecting rod 2 are respectively hinged at the tail ends of the two front guide plates 1; a first hinge point 3 is arranged at a position in the middle of the front connecting rod 2 biased towards a certain front wheel, and the first hinge point 3 here can be arranged on the left or right side, as long as it deviates from the center point of the front connecting rod 2; a first hinge support 4 is fixedly arranged at the bottom of the frame above the first hinge point 3, and the first hinge point 3 is hinged on the first hinge support 4; a second hinge point 5 is arranged in the middle of the front connecting rod 2, and a front triangle transmission frame 6 is arranged on the second hinge point 5, and the second hinge point 5 is hinged to one foot of the front triangle transmission frame 6, and the front triangle transmission frame 6 The apex is hinged on the second hinge support 7, the second hinge support 7 is fixed to the bottom of the frame, and the other leg of the front triangle transmission frame 6 extends to the same side of the first hinge point 3; rear guide plates 8 are fixedly arranged on the wheel seats 12 on both sides of the rear axle 17, the rear guide plates 8 extend forward, and guide holes are arranged at the tail end, a rear connecting rod 9 is arranged between the two rear guide plates 8, and the two ends of the rear connecting rod 9 are respectively hinged at the tail ends of the two rear guide plates 8; a third hinge point 10 is arranged at a position in the middle of the rear connecting rod 9 biased towards the first hinge point 3, a rear triangle transmission frame 11 is arranged on the third hinge point 10, the third hinge point 10 is hinged to one leg of the rear triangle transmission frame 11, the apex of the rear triangle transmission frame 11 is hinged on the third hinge support, the third hinge support is fixed to the bottom of the frame, and the other leg of the rear triangle transmission frame 11 extends to the center of the rear connecting rod 9; the front triangle transmission frame 6 and the rear triangle transmission frame 11 are hingedly connected by a straight shaft 13.

[0018] When this embodiment is used in practice, the wheel seat 12 refers to a mounting seat that can be moved together with the wheel. When the front wheel encounters a bumpy road surface and turns or turns manually, the wheel seat 12 drives the front connecting rod 2 through the guide plate. The front connecting rod 2 rotates around the first hinge point 3, thereby driving the front triangular transmission frame 6. The front triangular transmission frame 6 starts to rotate around the vertex, thereby driving the straight shaft 13. The straight shaft 13 drives the rear connecting rod 9 through the rear triangular transmission frame 11, so that the rear connecting rod 9 guides the rear wheel to turn to match the front wheel.

[0019] In this embodiment, the dimensions of the components and hinge points are adjusted according to actual conditions to avoid dead points or insufficient engagement.

[0020] In order to prevent the front connecting rod 2 from being stretched or squeezed due to asynchronous steering on both sides of the front wheels due to road problems, the front connecting rod 2 in this embodiment includes an adjusting part, which is a hydraulic cylinder 14. The two ends of the adjusting part are respectively connected to the front guide plate 1 through connectors, the first hinge point 3 coincides with the hole of the cylinder head, and the second hinge point 5 is arranged on the cylinder body.

[0021] In order to facilitate installation, the connector in this embodiment is a coupling 15 with adjustable length.

[0022] In order to ensure the reliability and stability of the entire motion transmission, in this embodiment, the first hinge point 3, the second hinge point 5 and the third hinge point 10 and the hinges of the front and rear triangular transmission frames 11 are all rotary hinges, and the central axis of each hinge point is in the vertical direction.

[0023] In addition, in order to avoid the twisting of the connecting rod caused by uneven road surface, a universal joint is provided at the hinge between the guide hole and the front guide plate 1 and the rear guide plate 8 in this embodiment.

[0024] In this embodiment, the included angles between the front triangular transmission frame 6 and the rear triangular transmission frame 11 are both right angles, and a reinforcing plate is provided between the two legs of the triangular transmission frame, which can facilitate the calculation of dimensions and installation.

[0025] In this embodiment, connectors are also provided at both ends of the rear connecting rod.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wheeled agricultural machinery front and rear wheel tracking control mechanism, comprising a frame and a front axle and a rear axle mounted at the bottom of the frame, characterized in that: Front guide plates are fixedly arranged on the wheel seats on both sides of the front axle, and the front guide plates extend backward and have guide holes at the rear ends. A front connecting rod is arranged between the two front guide plates, and the two ends of the front connecting rod are respectively hinged at the rear ends of the two front guide plates; a first hinge point is arranged at a position in the middle of the front connecting rod biased towards a certain front wheel, and a first hinge support is fixedly arranged on the bottom of the frame above the first hinge point, and the first hinge point is hinged on the first hinge support; a second hinge point is arranged in the middle of the front connecting rod, and a front triangle transmission frame is arranged on the second hinge point, the second hinge point is hinged to one foot of the front triangle transmission frame, the apex of the front triangle transmission frame is hinged to the second hinge support, the second hinge support is fixed to the bottom of the frame, and the other foot of the front triangle transmission frame extends to the same side of the first hinge point; rear guide plates are fixedly arranged on the wheel seats on both sides of the rear axle, and the rear guide plates extend forward and have guide holes at the rear ends. A rear connecting rod is arranged between them, and two ends of the rear connecting rod are respectively hinged at the tail parts of the two rear guide plates; a third hinge point is arranged at a position in the middle part of the rear connecting rod biased towards the first hinge point, and a rear triangle transmission frame is arranged on the third hinge point, and the third hinge point is hinged to one foot of the rear triangle transmission frame, and the apex of the rear triangle transmission frame is hinged to the third hinge support, and the third hinge support is fixed to the bottom of the frame, and the other foot of the rear triangle transmission frame extends to the center of the rear connecting rod; the front triangle transmission frame and the rear triangle transmission frame are hingedly connected by a straight axis; the front connecting rod includes an adjusting part, and the adjusting part is a hydraulic cylinder, and the two ends of the adjusting part are respectively connected to the front guide plate through connectors, the first hinge point coincides with the hole of the cylinder head, and the second hinge point is arranged on the cylinder body; the first hinge point, the second hinge point and the third hinge point and the hinges of the front and rear triangle transmission frames are all rotationally hinged, and the central axis of each hinge point is in the vertical direction.

2. A wheeled agricultural machinery front and rear wheel in-track control mechanism according to claim 1, characterized in that: The connector is a coupling with adjustable length.

3. The front and rear wheel tracking control mechanism of a wheeled agricultural machine according to claim 1, characterized in that: The hinges between the guide hole and the front guide plate and the rear guide plate are provided with universal hinges.

4. The front and rear wheel tracking control mechanism of a wheeled agricultural machine according to claim 1, characterized in that: The included angles of the front triangular transmission frame and the rear triangular transmission frame are both right angles, and a reinforcing plate is arranged between the two legs of the triangular transmission frame.

5. The front and rear wheel tracking control mechanism of a wheeled agricultural machine according to claim 1, characterized in that: Connectors are also provided at both ends of the rear connecting rod.

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