An implement lift stop position control system

Abstract

The utility model relates to the technical field of farm implement adjusting device discloses a farm implement lifting stop point position control system, including machine tool lifting arm, controller and lifting mechanism, the controller controls lifting mechanism to drive machine tool lifting arm rotation, its characterized in that, the contact sensor is equipped under machine tool lifting arm, the contact sensor connects controller, the contact sensor adjusts the relative distance with machine tool lifting arm through adjusting mechanism, machine tool lifting arm rotation triggers contact sensor control machine tool lifting arm stop rotating. Have the advantages that the structure is simple, convenient operation, can realize the fast farm implement and carry out the advantages such as ploughing depth automatic positioning.

Description

Technical Field

[0001] This utility model relates to the technical field of agricultural implement adjustment devices, specifically to a control system for the lifting and lowering stop point position of agricultural implements. Background Technology

[0002] Soil tillage is one of the most fundamental and crucial aspects of agricultural production, aiming to create favorable seedbeds and growing environments for crops. The core purpose of agricultural machinery is to replace human and animal power, achieving mechanization, efficiency, and precision in all stages of agricultural production. Agricultural machinery is used in almost every stage of crop production, from planting to harvesting, helping farmers to till the soil, remove weeds, improve soil aeration and water retention, and create favorable conditions for crop growth.

[0003] Currently, agricultural machinery can control the depth of tillage through hydraulic suspension systems, as crop roots are primarily distributed in the topsoil. Uniform tillage depth provides equal space for root extension across all crops. Consistent sowing depth relies on uniform tillage depth. Inconsistent tillage depth leads to significant differences in seed environment (moisture, temperature, compaction), resulting in some seeds germinating while others remain in the soil, or rotting due to excessive depth. This ultimately leads to uneven seedling growth, creating a poor foundation for subsequent management and yield. In areas with insufficient tillage, root development is limited, hindering the absorption of deeper water and nutrients, resulting in weak plant growth; in areas with excessive tillage, root growth may be poor due to compacted soil and lack of oxygen. Uniform depth ensures balanced crop growth across the entire field. Uniform tillage depth is a core requirement of high-standard agricultural operations, offering comprehensive and crucial benefits. It's not merely for aesthetics, but for achieving high yields, high efficiency, water conservation, energy saving, and sustainable agricultural development. Therefore, existing technologies provide suspension control systems to solve the problem of uniform depth during tillage.

[0004] Chinese patent document CN109691263A discloses an automatic tillage depth control device for agricultural machinery, comprising: a tillage depth calibration module for controlling the agricultural machinery to perform tillage depth calibration, and using the calibration result as a comparison standard for tillage depth; a setting module for setting a tillage depth range according to the comparison standard; the tillage depth range includes a tillage depth parameter; and a judgment module for judging whether the actual tillage depth collected by the sensor during the current operation exceeds the set tillage depth range based on the sensor values ​​on the agricultural machinery. If so, the position of the agricultural machinery is adjusted and the tillage depth is recalibrated; otherwise, tillage continues.

[0005] For example, Chinese patent document CN115633554A discloses an electric tractor suspension control system, including a control panel, a tillage depth controller, a lift motor driver, a lift motor, a reduction mechanism, an angle sensor, and a suspension mechanism. The lift motor driver is directly connected to the lift motor, and the lift motor is connected to the suspension mechanism through the reduction mechanism. The suspension mechanism includes a lifting arm, a lower lever, an upper lever, and a lifting rod. The angle sensor is installed on the lifting arm and obtains the corresponding tillage depth value by detecting changes in the lifting arm's rotation angle. The tillage depth controller is connected to the control panel, the angle sensor, and the lift motor driver. The lift motor controls the raising and lowering of the implement by receiving signals from the lift motor driver.

[0006] In existing technologies, angle sensors are used to detect changes in the lifting arm's rotation angle to obtain the corresponding tillage depth value. However, during reciprocating tillage operations, agricultural implements turn or turn around after tilling each furrow. To avoid this, the implements need to be lifted before turning or turning around, and then lowered again to determine the tillage depth. Lowering the implements again requires determining the previous tillage depth, and adjustments are needed every time the implements are lifted. This is not only cumbersome to operate, but also cannot automatically lock the tillage depth. Summary of the Invention

[0007] To address the technical problem of quickly and conveniently locking the tillage depth during reciprocating tillage, this utility model provides a control system for the lifting stop point of an agricultural implement, including an implement lifting arm, a controller, and a lifting mechanism. The controller controls the lifting mechanism to drive the implement lifting arm to rotate. The system is characterized by a contact sensor located below the implement lifting arm, connected to the controller. The contact sensor adjusts its relative distance to the implement lifting arm via an adjustment mechanism. Rotation of the implement lifting arm triggers the contact sensor to stop the arm's rotation.

[0008] To facilitate adjustment of the initial tillage depth, the adjustment mechanism includes an adjustment handle, an adjustment cable, and a connector. The connector is rotatably connected to the rotating shaft of the implement lifting arm, and the connector is connected to the adjustment cable. The adjustment cable is connected to the adjustment handle, and the adjustment handle adjusts the relative distance between the contact sensor and the implement lifting arm via the adjustment cable.

[0009] To facilitate resetting, a return torsion spring is provided on the rotating shaft, which drives the connecting piece to rotate and reset.

[0010] Preferably, the return torsion spring drives the connector to rotate on the rotating shaft closer to the lifting arm of the machine, and the adjusting cable drives the connector to rotate on the rotating shaft away from the lifting arm of the machine.

[0011] To facilitate contact between the lifting arm of the machine and the contact sensor, the connector includes an extension and a mounting portion. The extension is inclined downwards towards the lifting arm of the machine, and the contact sensor is mounted on the mounting portion and faces the lifting arm of the machine.

[0012] To facilitate the downward pulling of the contact sensor, an extension rod is provided on one side of the connector, and the end of the extension rod is connected to the adjustment cable. The extension rod allows for misalignment and avoids interference between the adjustment cable and other components.

[0013] To facilitate the control of the adjustment cable by the adjustment handle, the adjustment handle is rotatably connected to the agricultural machinery, and the adjustment cable is vertically connected to the adjustment handle via a cable arm.

[0014] To facilitate fixing the contact sensor at any angle, a nut and a bushing are provided at the end of the adjustment handle, and a flat washer and a saddle-shaped spring washer are provided between the nut and the bushing.

[0015] This utility model has the following beneficial effects: This invention controls the downward limit position of the implement lifting arm through a contact sensor. Only the tillage depth needs to be adjusted during the first tillage operation. Each subsequent time the implement lifting arm descends to the contact sensor, it will automatically stop. Turning, U-turns, and other actions that require lifting the implement lifting arm during the reciprocating process will not affect the subsequent tillage depth. Furthermore, the contact sensor of this invention can also play a dual role of mechanical and electronic stopping, which not only improves the accuracy of each tillage operation, but also has a simple overall structure, is easy to operate, has few parts, and has low manufacturing cost. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an embodiment of the agricultural implement lifting stop point position control system of this utility model; Figure 2 for Figure 1 Side view; Figure 3 This is a schematic diagram of the adjustment handle. Detailed Implementation

[0017] The following detailed description illustrates the specific implementation methods: The reference numerals in the accompanying drawings include: 1. Lifting arm of the machine; 2. Controller; 3. Solenoid valve; 4. Lifting cylinder; 5. Contact sensor; 6. Adjusting handle; 7. Adjusting cable; 8. Connector; 801. Extension part; 802. Mounting part; 803. Extension rod; 9. Rotating shaft; 10. Return torsion spring; 11. Nut; 12. Bushing; 13. Flat washer; 14. Saddle-shaped spring washer; 15. Cable arm.

[0018] Example 1 like Figure 1-3As shown, a control system for the lifting stop point of an agricultural implement includes a lifting arm 1, a controller 2, a lifting mechanism, and an adjusting mechanism. The lifting mechanism includes a solenoid valve 3 and a lifting cylinder 4. The controller 2 controls the solenoid valve 3, which in turn controls the lifting cylinder 4 to rotate the lifting arm 1. A contact sensor 5 is located below the lifting arm 1 and is connected to the controller 2. The contact sensor 5 adjusts its relative distance to the lifting arm 1 via the adjusting mechanism. The rotation of the lifting arm 1 triggers the contact sensor 5, which then sends a feedback signal to the controller 2. The controller 2 then controls the lifting arm 1 to stop rotating via the lifting mechanism.

[0019] The adjustment mechanism includes an adjustment handle 6, an adjustment cable 7, and a connector 8. The connector 8 is rotatably connected to the rotation shaft 9 of the lifting arm 1 of the machine. The connector 8 is connected to the adjustment cable 7, and the adjustment cable 7 is connected to the adjustment handle 6. The adjustment handle 6 adjusts the relative distance between the contact sensor 5 and the lifting arm 1 of the machine through the adjustment cable 7.

[0020] The rotating shaft 9 is provided with a return torsion spring 10, which drives the connecting piece 8 to rotate counterclockwise to reset.

[0021] The return torsion spring 10 drives the connector 8 to rotate on the rotating shaft 9 closer to the lifting arm 1, and the adjusting cable 7 drives the connector 8 to rotate clockwise on the rotating shaft 9 away from the lifting arm 1.

[0022] The connector 8 includes an extension 801 and a mounting portion 802. The extension 801 is inclined downwards towards the lifting arm 1 of the machine, and the contact sensor is mounted on the mounting portion 802 and faces the lifting arm 1 of the machine.

[0023] An extension rod 803 is provided on one side of the connector 8, and the end of the extension rod 803 is connected to the adjusting cable 7. The extension rod 803 extends and misaligns the cable to avoid interference between the adjusting cable 7 and other components.

[0024] The end of the adjusting handle 6 is rotatably connected to the agricultural machinery via a thread, and the adjusting cable 7 is vertically connected to the adjusting handle 6 via the cable arm 15.

[0025] The adjusting handle 6 is provided with a nut 11 and a bushing 12 at its end. The adjusting handle 6 rotates in the bushing 12. A flat washer 13 and a saddle-shaped spring washer 14 are provided between the nut 11 and the bushing 12. The saddle-shaped spring washer 14 increases the friction between the adjusting handle 6 and the nut 11 to facilitate fixing.

[0026] When the agricultural machinery is used for the first time for tilling, the contact sensor 5 is lowered to the lowest position by adjusting the handle 6, and the implement is pressed down into the soil. Then, the contact sensor 5 is adjusted to the position where it just contacts the lifting arm 1 of the implement and locked in this position. When the lifting arm 1 of the implement is raised and turns, the lifting arm 1 of the implement is pressed down into the soil. After the contact sensor 5 recognizes the lifting arm 1 of the implement, the controller 2 stops the pressing down of the lifting arm 1 of the implement, thus achieving automatic positioning.

[0027] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Therefore, those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A control system for the lifting stop point of an agricultural implement, comprising a implement lifting arm, a controller, and a lifting mechanism, wherein the controller controls the lifting mechanism to drive the implement lifting arm to rotate, characterized in that, A contact sensor is provided below the lifting arm of the machine. The contact sensor is connected to a controller. The relative distance between the contact sensor and the lifting arm is adjusted by an adjustment mechanism. The rotation of the lifting arm triggers the contact sensor to control the lifting arm to stop rotating.

2. The agricultural implement lifting stop position control system according to claim 1, characterized in that: The adjustment mechanism includes an adjustment handle, an adjustment cable, and a connector. The connector is rotatably connected to the rotation shaft of the lifting arm of the machine. The connector is connected to the adjustment cable, and the adjustment cable is connected to the adjustment handle. The adjustment handle adjusts the relative distance between the contact sensor and the lifting arm of the machine through the adjustment cable.

3. The agricultural implement lifting stop position control system according to claim 2, characterized in that: The rotating shaft is equipped with a return torsion spring, which drives the connecting piece to rotate and reset.

4. The agricultural implement lifting stop position control system according to claim 3, characterized in that: The return torsion spring causes the connector to rotate on the rotating shaft closer to the lifting arm of the machine, while the adjusting cable causes the connector to rotate on the rotating shaft away from the lifting arm of the machine.

5. The agricultural implement lifting stop position control system according to claim 4, characterized in that: The connector includes an extension and a mounting portion. The extension is inclined downwards towards the lifting arm of the machine, and the contact sensor is mounted on the mounting portion and faces the lifting arm of the machine.

6. The agricultural implement lifting stop position control system according to claim 5, characterized in that: An extension rod is provided on one side of the connector, and the end of the extension rod is connected to the adjustment cable.

7. The agricultural implement lifting stop position control system according to claim 6, characterized in that: The adjusting handle is rotatably connected to the agricultural machinery, and the adjusting cable is vertically connected to the adjusting handle via a cable arm.

8. The agricultural implement lifting stop position control system according to any one of claims 2-7, characterized in that: The end of the adjusting handle is provided with a nut and a bushing, and a flat washer and a saddle-shaped spring washer are provided between the nut and the bushing.

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