A tractor's floating front drive axle, control method and tractor

Abstract

The application provides a tractor's suspension front drive axle, a control method and a tractor. In the tractor's suspension front drive axle, the front and rear ends of an engine are connected with a bracket and a gearbox, the front ends of a pair of side plates are connected with the bracket, the rear ends of the pair of side plates are connected with the gearbox, the front end of a rocker arm is hinged with the bottom of a pair of suspension oil cylinders, the rear end of the rocker arm is hinged with the pair of side plates, the top of the pair of suspension oil cylinders is hinged with the bracket, the pair of suspension oil cylinders is connected with a solenoid valve, the top of an angle sensor is connected with the bottom of the engine, the two ends of a connecting rod are hinged with the angle sensor and the rocker arm, a plurality of pressure sensors are connected with the rod cavity and the rodless cavity of the pair of suspension oil cylinders, the rocker arm is connected with a front axle, tires are installed on the two sides of the front axle, the solenoid valve, the angle sensor and the plurality of pressure sensors are connected with a control system.

Description

Technical Field

[0001] This invention relates to the field of tractor front drive axle technology, and more particularly to a suspended front drive axle for a tractor, a control method thereon, and the tractor itself. Background Technology

[0002] Tractors typically operate on rough, uneven surfaces such as farmland, paddy fields, construction sites, and field paths, resulting in significant impacts during tractor movement. Currently, tractors manufactured using this technology employ rigid front drive axles. During operation, these rigid axles transmit 100% of the impacts from the ground to the tractor chassis, and subsequently to the entire tractor. Rigid front drive axles offer no benefit whatsoever in improving driving smoothness or comfort, or in reducing chassis vibration or extending chassis life. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a suspended front drive axle for a tractor, a control method, and a tractor.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A suspended front drive axle for a tractor includes: an engine, a bracket, a gearbox, a pair of side plates, a rocker arm, a pair of suspension cylinders, a solenoid valve, an angle sensor, multiple pressure sensors, a connecting rod, a front axle, and a control system. The front and rear ends of the engine are connected to the bracket and the gearbox respectively. The front ends of the pair of side plates are connected to the bracket, and the rear ends of the pair of side plates are connected to the gearbox. The front end of the rocker arm is hinged to the bottom of the pair of suspension cylinders, and the rear end of the rocker arm is hinged to the pair of side plates. The top of the pair of suspension cylinders is hinged to the bracket. The pair of suspension cylinders are connected to the solenoid valve. The top of the angle sensor is connected to the bottom of the engine. The two ends of the connecting rod are hinged to the angle sensor and the rocker arm respectively. The multiple pressure sensors are connected to the rod chamber and the rodless chamber of the pair of suspension cylinders respectively. The rocker arm is connected to the front axle. Tires are installed on both sides of the front axle. The solenoid valve, the angle sensor, and the multiple pressure sensors are all connected to the control system.

[0005] The beneficial effects of adopting the technical solution of this invention are as follows: During tractor operation, the tires move vertically according to changes in the ground, driving the rocker arm to move up and down vertically. The sensor, through a linkage mechanism with the rocker arm, identifies the positional changes of the rocker arm and converts these changes into electrical signals, which are then transmitted to the control system. Based on the positional changes of the rocker arm, the control system activates the solenoid valve to pump or return oil to the suspension cylinder at an appropriate speed, thereby controlling the compression or extension of the suspension cylinder and allowing the rocker arm to smoothly return to its initial position. This reduces the impact of the ground on the entire vehicle, improves the tractor's driving smoothness and comfort, reduces chassis vibration, and extends chassis life.

[0006] Furthermore, each of the pair of suspension cylinders is connected to an accumulator via an oil pipe.

[0007] The beneficial effect of adopting the above-mentioned further technical solution is that the setting of the accumulator enables the suspension cylinder to extend and retract smoothly.

[0008] Furthermore, the front end of the rocker arm is hinged to the bottom of a pair of suspension cylinders via a first pin, the rear end of the rocker arm is hinged to a pair of side plates via a second pin, and the top of each pair of suspension cylinders is hinged to the bracket via a third pin.

[0009] The beneficial effects of adopting the above-mentioned further technical solution are: the setting of the pin shaft facilitates the hinge connection between various components, and facilitates the installation and maintenance of various components.

[0010] Furthermore, the two ends of the connecting rod are hinged to the angle sensor and the rocker arm respectively through ball joints.

[0011] The beneficial effects of adopting the above-mentioned further technical solution are: the ball head setting facilitates the sensor to detect the swing angle of the rocker arm and prevents the rocker arm, connecting rod and sensor from getting stuck.

[0012] Furthermore, the angle sensor is connected to the control system via a wiring harness.

[0013] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates signal transmission between the angle sensor and the control system.

[0014] Furthermore, the rocker arm has a frame structure.

[0015] The beneficial effects of adopting the above-mentioned further technical solutions are: it facilitates the vertical movement of the rocker arm as a whole, facilitates the detection of ground changes by sensors, and improves the stability and reliability of the entire vehicle.

[0016] In addition, the present invention also provides a tractor, including a suspended front drive axle of a tractor as described in any one of the above claims.

[0017] The beneficial effects of adopting the technical solution of this invention are as follows: During tractor operation, the tires move vertically according to changes in the ground, driving the rocker arm to move up and down vertically. The sensor, through a linkage mechanism with the rocker arm, identifies the positional changes of the rocker arm and converts these changes into electrical signals, which are then transmitted to the control system. Based on the positional changes of the rocker arm, the control system activates the solenoid valve to pump or return oil to the suspension cylinder at an appropriate speed, thereby controlling the compression or extension of the suspension cylinder and allowing the rocker arm to smoothly return to its initial position. This reduces the impact of the ground on the entire vehicle, improves the tractor's driving smoothness and comfort, reduces chassis vibration, and extends chassis life.

[0018] In addition, the present invention also provides a control method for a suspended front drive axle of a tractor, based on any one of the above-described suspended front drive axles of a tractor, the control method for a suspended front drive axle of a tractor includes:

[0019] S1. The angle sensor acquires information about the position change of the rocker arm;

[0020] S2. Multiple pressure sensors acquire the pressure of the rod-side chamber and rodless chamber of a pair of suspension cylinders, respectively.

[0021] S3. The control system generates control commands based on the position change information of the rocker arm and the pressure of the rod-side and rodless chambers of a pair of suspension cylinders.

[0022] S4. The solenoid valve adjusts the height and pressure of a pair of suspension cylinders according to the control command, so that the rocker arm is kept in the initial position.

[0023] The beneficial effects of adopting the technical solution of this invention are as follows: During tractor operation, the tires move vertically according to changes in the ground, driving the rocker arm to move up and down vertically. The sensor, through a linkage mechanism with the rocker arm, identifies the positional changes of the rocker arm and converts these changes into electrical signals, which are then transmitted to the control system. Based on the positional changes of the rocker arm, the control system activates the solenoid valve to pump or return oil to the suspension cylinder at an appropriate speed, thereby controlling the compression or extension of the suspension cylinder and allowing the rocker arm to smoothly return to its initial position. This reduces the impact of the ground on the entire vehicle, improves the tractor's driving smoothness and comfort, reduces chassis vibration, and extends chassis life.

[0024] Further, step S4 includes:

[0025] S41. The control system obtains the preset adjustment speed;

[0026] S42. The solenoid valve adjusts the height and pressure of a pair of suspension cylinders according to the control command and the preset adjustment speed, so that the rocker arm is kept in the initial position.

[0027] The beneficial effects of adopting the above-mentioned further technical solution are: according to the control command and the preset adjustment speed, the height and pressure of a pair of suspension cylinders are adjusted, so that the suspension cylinders work smoothly, prevent sudden rapid lifting and lowering, improve user experience, and improve smoothness and comfort.

[0028] The advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0029] Figure 1 This is one of the structural schematic diagrams of a suspended front drive axle provided in an embodiment of the present invention.

[0030] Figure 2 This is the second schematic diagram of the structure of the suspended front drive axle provided in an embodiment of the present invention.

[0031] Figure 3 This is a schematic flowchart illustrating the control method for a suspended front drive axle provided in an embodiment of the present invention.

[0032] Explanation of reference numerals: 1. Engine; 2. Bracket; 3. Gearbox; 4. Side plate; 6. Rocker arm; 7. First pin; 8. Suspension cylinder; 9. Second pin; 10. Third pin; 11. Oil pipe; 12. Accumulator; 13. Solenoid valve; 14. Angle sensor; 15. Connecting rod; 16. Wiring harness; 17. Front axle; 18. Bolt. Detailed Implementation

[0033] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0034] like Figure 1 and Figure 2As shown, this embodiment of the invention provides a suspended front drive axle for a tractor, including: an engine 1, a bracket 2, a gearbox 3, a pair of side plates 4, a rocker arm 6, a pair of suspension cylinders 8, a solenoid valve 13, an angle sensor 14, multiple pressure sensors, a connecting rod 15, a front axle 17, and a control system. The front and rear ends of the engine 1 are connected to the bracket 2 and the gearbox 3 respectively. The front ends of the pair of side plates 4 are connected to the bracket 2, and the rear ends of the pair of side plates 4 are connected to the gearbox 3. The front end of the rocker arm 6 is hinged to the bottom of the pair of suspension cylinders 8, and the rear end of the rocker arm 6 is hinged to the bottom of the pair of side plates 8. Plate 4 is hinged, the tops of the pair of suspension cylinders 8 are both hinged to the bracket 2, the pair of suspension cylinders 8 are connected to the solenoid valve 13, the top of the angle sensor 14 is connected to the bottom of the engine 1, the two ends of the connecting rod 15 are hinged to the angle sensor 14 and the rocker arm 6 respectively, the multiple pressure sensors 14 are connected to the rod chamber and rodless chamber of the pair of suspension cylinders 8 respectively, the rocker arm 6 is connected to the front axle 17, tires are installed on both sides of the front axle 17, and the solenoid valve 13, the angle sensor 14, and the multiple pressure sensors are all connected to the control system.

[0035] The beneficial effects of adopting the technical solution of this invention are as follows: During tractor operation, the tires move vertically according to changes in the ground, driving the rocker arm to move up and down vertically. The sensor, through a linkage mechanism with the rocker arm, identifies the positional changes of the rocker arm and converts these changes into electrical signals, which are then transmitted to the control system. Based on the positional changes of the rocker arm, the control system activates the solenoid valve to pump or return oil to the suspension cylinder at an appropriate speed, thereby controlling the compression or extension of the suspension cylinder and allowing the rocker arm to smoothly return to its initial position. This reduces the impact of the ground on the entire vehicle, improves the tractor's driving smoothness and comfort, reduces chassis vibration, and extends chassis life.

[0036] Among them, the pair of side plates 4 are the left side plate and the right side plate, and the pair of side plates 4 are located on the left and right sides of the engine 1 respectively.

[0037] It should be noted that the transmission route and structure of the present invention may be, but are not limited to, the above-described manner. Those skilled in the art can modify only the dimensional parameters of some components to form a new type of suspension bridge, or modify only the shape of the structural components to form a new type of steering drive bridge, all of which are within the protection scope of the present invention.

[0038] like Figure 1 and Figure 2 As shown, further, each of the pair of suspension cylinders 8 is connected to an accumulator 12 via an oil pipe 11.

[0039] The beneficial effect of adopting the above-mentioned further technical solution is that the setting of the accumulator enables the suspension cylinder to extend and retract smoothly.

[0040] like Figure 1 and Figure 2 As shown, further, the front end of the rocker arm 6 is hinged to the bottom of a pair of suspension cylinders 8 via a first pin 7, the rear end of the rocker arm 6 is hinged to a pair of side plates 4 via a second pin 9, and the top of each pair of suspension cylinders 8 is hinged to the bracket 2 via a third pin 10.

[0041] The beneficial effects of adopting the above-mentioned further technical solution are: the setting of the pin shaft facilitates the hinge connection between various components, and facilitates the installation and maintenance of various components.

[0042] like Figure 1 and Figure 2 As shown, further, the two ends of the connecting rod 15 are hinged to the angle sensor 14 and the rocker arm 6 respectively through ball joints.

[0043] The beneficial effects of adopting the above-mentioned further technical solution are: the ball head setting facilitates the sensor to detect the swing angle of the rocker arm and prevents the rocker arm, connecting rod and sensor from getting stuck.

[0044] like Figure 1 and Figure 2 As shown, the angle sensor 14 is further connected to the control system via a wiring harness 16.

[0045] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates signal transmission between the angle sensor and the control system.

[0046] like Figure 1 and Figure 2 As shown, the rocker arm 6 is further described as a frame structure.

[0047] The beneficial effects of adopting the above-mentioned further technical solutions are: it facilitates the vertical movement of the rocker arm as a whole, facilitates the detection of ground changes by sensors, and improves the stability and reliability of the entire vehicle.

[0048] The rocker arm can be an X-shaped, Y-shaped, H-shaped, I-shaped, or rectangular frame structure.

[0049] This invention provides a suspended front drive axle for a tractor. The front drive axle is connected to the chassis (carrier, engine, and gearbox) via a suspension cylinder. The front axle (front drive axle) detects changes in ground position via sensors (angle sensors) and transmits these changes to the control system in real time. The control system analyzes the ground position using a preset program and outputs a signal to the suspension cylinder. By controlling the extension and retraction of the suspension cylinder, the relative position of the front axle to the ground is adjusted, reducing the impact of road surface changes on the vehicle.

[0050] The suspended front drive axle mainly consists of a bracket 2, side plate 4, rocker arm 6, front axle 17, angle sensor 14, suspension cylinder 8, accumulator 12, solenoid valve 13, and control system.

[0051] The front of engine 1 is fixedly connected to bracket 2 by bolts, and the rear is fixedly connected to gearbox 3 by bolts. The front of the left side plate and the right side plate (a pair of side plates) are fixedly connected to bracket 2 by bolts, and the rear is fixedly connected to gearbox 3 by bolts.

[0052] The front part of the rocker arm 6 is hinged to two suspension cylinders 8 via a first pin 7, and the rear part is hinged to the left and right side plates via a second pin 9. The upper part of the suspension cylinders 8 is hinged to the bracket 2 via a third pin 10.

[0053] The suspension cylinder 8 is connected to the accumulator 12 and the solenoid valve 13 via the oil pipe 11.

[0054] Angle sensor 14 is fixedly connected to engine 1 by bolts and hinged to connecting rod 15 by ball joint. Connecting rod 15 is hinged to rocker arm 6 by ball joint.

[0055] Angle sensor 14 is connected to the control system via wiring harness 16.

[0056] The front axle 17 is fixedly connected to the rocker arm 6 by bolts 18, and the tire is fixedly connected to the front axle 17 by bolts.

[0057] During tractor operation, the tires move vertically according to changes in the ground, causing the rocker arm 6 to move up and down vertically. The angle sensor 14, through a linkage mechanism (link) with the rocker arm 6, identifies the positional changes of the rocker arm 6 and converts these changes into electrical signals that are transmitted to the control system.

[0058] The control system activates solenoid valve 13 based on the position change of rocker arm 6, pumping or returning oil to suspension cylinder 8 at an appropriate speed. This controls the compression or extension of suspension cylinder 8, allowing rocker arm 6 to smoothly return to its initial position. This reduces the impact of the ground on the vehicle, improving driving comfort and smoothness. It also reduces the impact of the ground on the chassis, extending the chassis's service life.

[0059] In addition, the present invention also provides a tractor, including a suspended front drive axle of a tractor as described in any one of the above claims.

[0060] The beneficial effects of adopting the technical solution of this invention are as follows: During tractor operation, the tires move vertically according to changes in the ground, driving the rocker arm to move up and down vertically. The sensor, through a linkage mechanism with the rocker arm, identifies the positional changes of the rocker arm and converts these changes into electrical signals, which are then transmitted to the control system. Based on the positional changes of the rocker arm, the control system activates the solenoid valve to pump or return oil to the suspension cylinder at an appropriate speed, thereby controlling the compression or extension of the suspension cylinder and allowing the rocker arm to smoothly return to its initial position. This reduces the impact of the ground on the entire vehicle, improves the tractor's driving smoothness and comfort, reduces chassis vibration, and extends chassis life.

[0061] like Figure 3 As shown, the present invention also provides a control method for a suspended front drive axle of a tractor, based on any one of the above-described suspended front drive axles of a tractor, the control method for a suspended front drive axle of a tractor includes:

[0062] S1. The angle sensor acquires information about the position change of the rocker arm;

[0063] S2. Multiple pressure sensors acquire the pressure of the rod-side chamber and rodless chamber of a pair of suspension cylinders, respectively.

[0064] S3. The control system generates control commands based on the position change information of the rocker arm and the pressure of the rod-side and rodless chambers of a pair of suspension cylinders.

[0065] S4. The solenoid valve adjusts the height and pressure of a pair of suspension cylinders according to the control command, so that the rocker arm is kept in the initial position.

[0066] The beneficial effects of adopting the technical solution of this invention are as follows: During tractor operation, the tires move vertically according to changes in the ground, driving the rocker arm to move up and down vertically. The sensor, through a linkage mechanism with the rocker arm, identifies the positional changes of the rocker arm and converts these changes into electrical signals, which are then transmitted to the control system. Based on the positional changes of the rocker arm, the control system activates the solenoid valve to pump or return oil to the suspension cylinder at an appropriate speed, thereby controlling the compression or extension of the suspension cylinder and allowing the rocker arm to smoothly return to its initial position. This reduces the impact of the ground on the entire vehicle, improves the tractor's driving smoothness and comfort, reduces chassis vibration, and extends chassis life.

[0067] Further, step S4 includes:

[0068] S41. The control system obtains the preset adjustment speed;

[0069] S42. The solenoid valve adjusts the height and pressure of a pair of suspension cylinders according to the control command and the preset adjustment speed, so that the rocker arm is kept in the initial position.

[0070] The beneficial effects of adopting the above-mentioned further technical solution are: according to the control command and the preset adjustment speed, the height and pressure of a pair of suspension cylinders are adjusted, so that the suspension cylinders work smoothly, prevent sudden rapid lifting and lowering, improve user experience, and improve smoothness and comfort.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A suspended front drive axle for a tractor, characterized in that, include: The system comprises an engine, a bracket, a gearbox, a pair of side plates, a rocker arm, a pair of suspension cylinders, a solenoid valve, an angle sensor, multiple pressure sensors, connecting rods, a front axle, and a control system. The front and rear ends of the engine are connected to the bracket and the gearbox respectively. The front ends of the pair of side plates are connected to the bracket, and the rear ends of the pair of side plates are connected to the gearbox. The front end of the rocker arm is hinged to the bottom of the pair of suspension cylinders, and the rear end of the rocker arm is hinged to the pair of side plates. The top of the pair of suspension cylinders is hinged to the bracket. The pair of suspension cylinders are connected to the solenoid valve. The top of the angle sensor is connected to the bottom of the engine. The two ends of the connecting rod are hinged to the angle sensor and the rocker arm respectively. The multiple pressure sensors are connected to the rod-side chamber and rodless chamber of the pair of suspension cylinders respectively. The rocker arm is connected to the front axle. Tires are installed on both sides of the front axle. The solenoid valve, the angle sensor, and the multiple pressure sensors are all connected to the control system. The pair of suspension cylinders are connected to accumulators through oil pipes. The front end of the rocker arm is hinged to the bottom of the pair of suspension cylinders through a first pin. The rear end of the rocker arm is hinged to the pair of side plates through a second pin. The top of the pair of suspension cylinders is hinged to the bracket through a third pin.

2. The suspended front drive axle of a tractor according to claim 1, characterized in that, The two ends of the connecting rod are hinged to the angle sensor and the rocker arm respectively through ball joints.

3. The suspended front drive axle of a tractor according to claim 1, characterized in that, The angle sensor is connected to the control system via a wiring harness.

4. The suspended front drive axle of a tractor according to claim 1, characterized in that, The rocker arm has a frame structure.

5. A tractor, characterized in that, The suspended front drive axle of a tractor as described in any one of claims 1 to 4 above.

6. A control method for a suspended front drive axle of a tractor, characterized in that, Based on any one of claims 1 to 4, the suspended front drive axle of the tractor, the control method for the suspended front drive axle of the tractor includes: S1. The angle sensor acquires information about the position change of the rocker arm; S2. Multiple pressure sensors acquire the pressure of the rod-side chamber and rodless chamber of a pair of suspension cylinders, respectively. S3. The control system generates control commands based on the position change information of the rocker arm and the pressure of the rod-side and rodless chambers of a pair of suspension cylinders. S4. The solenoid valve adjusts the height and pressure of a pair of suspension cylinders according to the control command, so that the rocker arm is kept in the initial position. Step S4 includes: S41. The control system obtains the preset adjustment speed; S42. The solenoid valve adjusts the height and pressure of a pair of suspension cylinders according to the control command and the preset adjustment speed, so that the rocker arm is kept in the initial position.

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