Agricultural machine gear identification system

Abstract

The utility model relates to agricultural machinery transmission device technical field discloses a kind of agricultural machinery gear recognition system, including shift handle and controller, it is characterized in that, spring leaf is fixed on the shift handle, contact sensor is equipped with below shift handle side, the contact sensor is connected the controller, the spring leaf follows the shift handle switching gear and the contact sensor will be contacted or separated. The utility model has the advantages of simple structure, not easy to be interfered by outside, stable and reliable in identification process, low failure rate, long service life.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery transmission device technology, specifically to an agricultural machinery gear identification system. Background Technology

[0002] The gear position recognition system of agricultural machinery is a system that automatically detects, judges, and informs the control system of the tractor's current gear position. Gear position recognition is one of the cornerstones of achieving intelligent and automated agricultural machinery. Its main uses include: for power-shifting, partially power-shifting, or continuously variable transmission (CVT) agricultural machinery, the control system needs to accurately know the current gear in order to smoothly and precisely shift to the next optimal gear based on engine load, driving speed, and driver commands. Without accurate gear position recognition, automatic shifting cannot be achieved. With the development of hydraulic technology and rudimentary electronic control technology, power-reversing and partially power-shifting transmissions have emerged. The system needs to know the basic gear position status.

[0003] Chinese patent document CN218625379U discloses a transmission shifting device for a small agricultural machine, including a mounting base. A transmission arm, which is linked to the shift fork shaft of a transmission box, is mounted on the mounting base. A shift lever, used to drive the transmission arm, is mounted on the transmission arm. The transmission arm is rotatably connected to the mounting base, and the axis of rotation of the transmission arm is perpendicular to the axis of the shift fork shaft. The shift lever is movably connected to the transmission arm along a direction parallel to the axis of rotation of the transmission arm. A guide block is statically connected to the mounting base, and the guide block has a guide groove that restricts the movement path of the shift lever. The shift lever slides in cooperation with the guide groove, and the guide groove has staggered gear positions. In this transmission shifting device, gear shifting is performed via the shift lever, and the gear position is identified by a sensor in the transmission box.

[0004] For example, Chinese patent document CN114935005A discloses a gearbox and an agricultural vehicle, which involves a gear position detection assembly including a neutral sensor. A neutral notch on a first shift fork shaft is a first neutral notch, and a neutral notch on a second shift fork shaft is a second neutral notch. A neutral sensing notch is also provided on the side of the first shift fork shaft away from the second shift fork shaft, and the neutral sensing notch is aligned front-to-back with the first neutral notch. A second sliding hole is provided on the first shift fork shaft between the first neutral notch and the neutral sensing notch, aligned front-to-back with the first sliding hole. The two ends of the second sliding hole are respectively aligned with the first neutral notch. The neutral gear sensor is aligned with the shift fork notch. A second sliding pin is provided inside the second sliding hole, and the length of the second sliding pin is greater than the length of the second sliding hole. The neutral gear sensor is mounted on the housing and located in front of the first shift fork shaft. The sensing end of the neutral gear sensor faces rearward and is aligned with the first sliding hole. When both the first and second shift fork shafts slide until the two neutral gear notches are aligned with the first sliding hole, the sensing end of the neutral gear sensor extends into the neutral gear sensing notch to generate a sensing signal, and presses the second sliding pin, causing the rear end of the first sliding pin to extend into the second neutral gear notch. The neutral gear sensor is used for electrical connection with the ECU. To prevent agricultural machinery from overturning due to excessive speed when turning, a self-locking device is installed. When the agricultural machinery is in high gear, it cannot turn. It can only turn after it is identified that it is not in high gear. In the above-mentioned prior art, the gear position detection assembly is located in the gearbox and identifies the gear position through a complex connection structure, which is not only complex in structure but also expensive. Utility Model Content

[0005] This utility model provides a simple, reliable, and low-cost agricultural machinery gear position recognition system, including a gear shift handle and a controller. The system is characterized in that a spring is fixedly provided on the gear shift handle, and a contact sensor is provided on the lower side of the gear shift handle. The contact sensor is connected to the controller, and the spring contacts or disengages from the contact sensor as the gear shift handle changes gears.

[0006] To facilitate signal transmission through contact with the contact sensor, the reed includes a connecting section and a contact section, with the connection point between the connecting section and the contact section being a bend.

[0007] Preferably, a contact sensor is provided below the gear shift lever, and the contact sensor is located above the reed. When the gear shift lever is moved forward, the reed contacts the contact sensor upward. When the gear shift lever is moved backward, the reed disengages from the contact sensor downward.

[0008] To accommodate signal transmission for multiple gears, two contact sensors are provided below the gear shift lever, with a reed located between the two contact sensors. The two contact sensors transmit fast gear and low gear, respectively, and the medium gear is when the reed does not contact either of the contact sensors.

[0009] Preferably, the contact sensor is provided with a contact piece, and the contact piece is provided with an arc-shaped contact segment.

[0010] Preferably, the contact piece is inclined toward the spring.

[0011] To facilitate the detection and control of steering, the controller is connected to the display screen and the steering assistance system.

[0012] This utility model has the following beneficial effects: This invention uses a spring on the gear shift lever and a contact sensor below it to identify the gear position through simple mechanical contact and disengagement. This eliminates the need for complex sensors and transmission structures inside traditional gearboxes, resulting in a simple overall structure with fewer parts, which significantly reduces manufacturing costs and assembly difficulty. Furthermore, the contact method between the spring and the contact sensor is direct and clear, making it less susceptible to external interference. The identification process is stable and reliable, with a low failure rate and a long service life. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of Embodiment 1 of the agricultural machinery gear recognition system of this utility model; Figure 2 This is the state of the fast gear in Example 1; Figure 3 This refers to the low-speed gear state in Example 1; Figure 4 This is a schematic diagram of Embodiment 2 of the agricultural machinery gear recognition system of this utility model. Detailed Implementation

[0014] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: shift lever 1, spring 2, connecting section 201, contact section 202, contact sensor 3, contact piece 301, arc-shaped contact section 302, controller 4, display screen 5, and auxiliary steering system 6.

[0015] Example 1 like Figure 1-3As shown, an agricultural machinery gear position recognition system includes a gear shift lever 1, a spring 2, a contact sensor 3, and a controller 4. The spring 2 is fixedly disposed in the middle of the gear shift lever 1. A contact sensor 3 is disposed on the lower side of the gear shift lever 1. The contact sensor 3 is connected to the controller 4. The controller 4 is connected to a display screen 5 and an auxiliary steering system 6. The spring 2 will contact or disengage from the contact sensor 3 when the gear shift lever 1 changes gears.

[0016] The reed 2 includes a connecting section 201 and a contact section 202, and the connection point between the connecting section 201 and the contact section 202 is a bending point.

[0017] The contact sensor 3 is provided with an inclined contact piece 301, and the contact piece 301 is provided with an arc-shaped contact section 302.

[0018] The contact piece 301 is inclined toward the spring piece 2.

[0019] The contact sensor 3 is located above the reed 2. When the shift lever 1 is moved forward, the reed 2 contacts the contact sensor 3 upward, indicating a low gear. When the shift lever 1 is moved backward, the reed 2 disengages from the contact sensor 3 downward, indicating a high gear. When the reed 2 disengages from the contact sensor 3, the controller 4 identifies the gear change. The controller 4 identifies the gear status and transmits a signal to the auxiliary steering system 6. The auxiliary steering system 6 is existing technology and is used to identify the gear status of the agricultural machinery to determine whether to release the self-locking device.

[0020] Example 2 like Figure 4 As shown, an agricultural machinery gear position recognition system includes a gear shift lever 1, a spring 2, a contact sensor 3, and a controller 4. The spring 2 is fixedly disposed in the middle of the gear shift lever 1. Two contact sensors 3 are disposed on the lower side of the gear shift lever 1. The contact sensors 3 are connected to the controller 4. The controller 4 is connected to a display screen 5 and an auxiliary steering system 6. The spring 2 will contact or disengage from the contact sensors 3 as the gear shift lever 1 changes gears.

[0021] The reed 2 includes a connecting section 201 and a contact section 202, and the connection point between the connecting section 201 and the contact section 202 is a bending point.

[0022] The contact sensor 3 is provided with a contact piece 301, and the contact piece 301 is provided with an arc-shaped contact section 302.

[0023] The contact piece 301 is inclined toward the spring piece 2.

[0024] The reed 2 is located between the two contact sensors 3, which are divided into high-speed and low-speed transmission. When the reed 2 does not contact either of the contact sensors 3, it is in medium-speed mode. The controller 4 identifies the gear status and transmits a signal to the auxiliary steering system 6. The auxiliary steering system 6 is existing technology and is used to identify the gear status of the agricultural machinery to determine whether to release the self-locking device.

[0025] 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. An agricultural machinery gear position recognition system, comprising a gear shift lever and a controller, characterized in that, A spring is fixedly provided on the gear shift lever, and a contact sensor is provided on the lower side of the gear shift lever. The contact sensor is connected to the controller. The spring will contact or disengage from the contact sensor as the gear shift lever changes gears.

2. The agricultural machinery gear identification system according to claim 1, characterized in that: The reed includes a connecting section and a contact section, and the connection point between the connecting section and the contact section is a bending point.

3. The agricultural machinery gear identification system according to claim 2, characterized in that: A contact sensor is located below the gear shift lever and above the reed. When the gear shift lever is moved forward, the reed moves upward and contacts the contact sensor. When the gear shift lever is moved backward, the reed moves downward and disengages from the contact sensor.

4. The agricultural machinery gear identification system according to claim 2, characterized in that: Two contact sensors are provided below the gear shift lever, and a reed is located between the two contact sensors. The two contact sensors are used to transmit fast gear and low gear. When the reed does not contact either of the contact sensors, it is in medium gear.

5. The agricultural machinery gear identification system according to claim 3 or 4, characterized in that: The contact sensor is provided with a contact piece, and the contact piece is provided with an arc-shaped contact section.

6. The agricultural machinery gear identification system according to claim 5, characterized in that: The contact piece is inclined toward the spring.

7. The agricultural machinery gear identification system according to claim 6, characterized in that: The controller is connected to the display screen and the steering assist system.

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