Hydraulic power mower header operation anti-blocking device and control method

Abstract

The invention discloses a hydraulic power mower header operation anti-blocking device and a control method, the hydraulic power mower header operation anti-blocking device comprises an engine, a suspension support and a header, the suspension support is connected with the header through a hydraulic oil cylinder, a flail knife shaft is arranged in the header, blades are uniformly distributed on the outer side face of the flail knife shaft, the flywheel end of the engine is connected with a coupler, and the flywheel end of the engine is connected with the coupler. The coupler is connected with the triple pump, the triple pump is hydraulically connected with the proportional valve, the output end of the proportional valve is respectively hydraulically connected with the driving motor and the mowing motor, the output end of the mowing motor is connected with the belt pulley, the belt pulley is connected with the flail knife shaft through a belt, and an angle sensor is arranged on the suspension support. According to the hydraulic power mower header operation anti-blocking device and the control method, the header hanging and lifting device can make corresponding position changes according to different load conditions of mowing, and then the mowing operation quality and efficiency are improved.

Description

Technical Field

[0001] The invention relates to the technical field of mowing, and in particular to an anti-blocking device for cutting table operation of a hydraulic power mower and a control method. Background Art

[0002] As the working device of the mower, the cutting table is crucial for a hydraulic power mower.

[0003] In order to achieve better mowing effect, the cutting table of hydraulic lawn mowers is usually placed lower. However, when the grass is dense or high during operation, the feed amount of the cutting table will increase a lot, the cutting table will be blocked, or the blade will be tangled. At this time, the mowing effect will become very poor, or even worse, the mowing components will be damaged. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a hydraulic power lawn mower cutting table operation anti-blocking device and control method, which can make the cutting table suspension lifting device make corresponding position changes according to the different mowing load conditions, thereby improving the mowing operation quality and efficiency, and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hydraulic power lawn mower cutting table operation anti-blocking device, comprising an engine, a suspension bracket and a cutting table, the suspension bracket and the cutting table are connected by a hydraulic cylinder, a cutter shaft is arranged in the cutting table, and blades are evenly distributed on the outer side of the cutter shaft, the flywheel end of the engine is connected to a coupling, the coupling is connected to a triple pump, the triple pump is hydraulically connected to a proportional valve, the output end of the proportional valve is hydraulically connected to a drive motor and a lawn mower motor respectively, the output end of the lawn mower motor is connected to a pulley, the pulley is connected to the cutter shaft through a belt, an angle sensor is arranged on the suspension bracket, and a speed sensor is arranged on the cutter shaft.

[0006] As a preferred technical solution of the present invention, the triple pump is fixed on the flywheel housing of the engine through a flywheel housing cover.

[0007] As a preferred technical solution of the present invention, the output ends of the speed sensor and the angle sensor are respectively electrically connected to the input end of the vehicle controller, the output end of the vehicle controller is electrically connected to the input end of the proportional valve, and the input end of the hydraulic cylinder is hydraulically connected to the output end of the proportional valve.

[0008] The invention discloses a method for preventing blocking of a cutting table of a hydraulic power lawn mower. When the lawn mower is operating normally, a vehicle controller implements a distribution strategy of a walking speed and a mowing speed according to initialization setting parameters, and the mowing speed is inversely proportional to the walking speed.

[0009] As a preferred technical solution of the present invention, when the mowing speed decreases, it means that the load on the cutting table increases. The vehicle controller makes a real-time judgment on the mowing speed based on the difference between the value fed back by the speed sensor and the given value. According to the set control algorithm, the opening of the travel proportional valve is reduced and the opening of the cutting table proportional valve is increased, thereby reducing the travel operation speed and ensuring that the cutting table speed is controlled within the optimal range.

[0010] As a preferred technical solution of the present invention, when the load is reduced, the power used by the header is reduced, and according to the set control algorithm, the travel speed is increased to achieve closed-loop control.

[0011] As a preferred technical solution of the present invention, during the mowing operation, if the power distribution cannot ensure that the cutting table speed is within the optimal range, the vehicle controller will make another judgment based on the difference between the value fed back by the speed sensor and the given value, and feedback to the angle sensor according to the set control algorithm, and then control the lifting of the cutting table through the hydraulic cylinder. After the load is reduced, the cutting table is raised to an appropriate height according to the set control algorithm, the mowing motor is reversed, and the blocked weeds are cleared. After the clearing is completed, the operation continues according to the initial set parameters, thereby realizing closed-loop control.

[0012] Compared with the prior art, the beneficial effects of the present invention are: the hydraulic power lawn mower cutting table operation anti-blocking device and control method perform real-time judgment based on the input parameter value of the speed sensor and the set optimal range speed, and perform precise control through two preset adjustment control algorithms, including adjusting the power distribution and the increase of the cutting table height, thereby preventing the cutting table operation from being blocked and improving the mowing effect and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention;

[0014] Figure 2 It is a structural diagram of the header;

[0015] Figure 3 This is the anti-blocking control flow chart of the present invention.

[0016] In the figure: 1 engine, 2 triple pump, 3 proportional valve, 4 suspension bracket, 5 mowing motor, 6 driving motor, 7 flywheel housing cover, 8 angle sensor, 9 hydraulic cylinder, 10 pulley, 11 belt, 12 speed sensor, 13 knife shaft, 14 cutting table. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-2 The present invention provides a technical solution: a hydraulic power lawn mower cutting table operation anti-blocking device, including an engine 1, a triple pump 2, a proportional valve 3, a mowing motor 5, a flinging blade shaft 13, a suspension bracket 4, a hydraulic cylinder 9, a speed sensor 12, an angle sensor 8 and a vehicle controller;

[0019] The suspension bracket 4 is connected to the cutting platform 14 through a hydraulic cylinder 9, and the height of the cutting platform 14 is controlled by the hydraulic cylinder 9. A knife-flinging shaft 13 is arranged in the cutting platform 14, and blades are evenly distributed on the outer side of the knife-flinging shaft 13. The flywheel end of the engine 1 is connected to the coupling, and the coupling is connected to the triple pump 2 for transmitting power. The triple pump 2 is fixed to the flywheel housing of the engine 1 through the flywheel housing cover 7. The triple pump 2 is hydraulically connected to the proportional valve 3. The output end of the proportional valve 3 is hydraulically connected to the driving motor 6 and the mowing motor 5 respectively. The output end of the mowing motor 5 is connected to the pulley 10, so as to drive the knife-flinging shaft 13 to rotate for mowing operations. The pulley 10 is connected to the knife-flinging shaft 13 through a belt 11. An angle sensor 8 is arranged on the suspension bracket 4 for feeding back the current height of the cutting platform 14. A speed sensor 12 is arranged on the knife-flinging shaft 13 for detecting the speed of the knife-flinging shaft 13;

[0020] The output ends of the speed sensor 12 and the angle sensor 8 are respectively electrically connected to the input end of the vehicle controller, the output end of the vehicle controller is electrically connected to the input end of the proportional valve 3, and the input end of the hydraulic cylinder 9 is hydraulically connected to the output end of the proportional valve 3.

[0021] like Figure 3 As shown, a method for preventing blocking of a cutting table operation of a hydraulic power lawn mower is provided. When the lawn mower is operating normally, the vehicle controller implements a distribution strategy of walking speed and mowing speed according to the initialization setting parameters, and starts mowing according to the set cutting table lifting height.

[0022] The engine is the only power source of the hydraulic power mower. Under the same engine throttle opening, there is an interactive influence between the operating speed and the cutting table speed, that is, the mowing speed is inversely proportional to the walking speed. Therefore, when the mowing speed decreases, it means that the load on the cutting table 14 becomes larger. In order to prevent the cutting table 14 from being blocked, the vehicle controller makes a real-time judgment on the mowing speed based on the difference between the value fed back by the speed sensor 12 and the given value. According to the set control algorithm, the opening of the walking proportional valve is reduced and the opening of the cutting table proportional valve is increased, thereby reducing the walking operation speed and allocating more power to the cutting table 14 to ensure that the speed of the cutting table 14 is controlled within the optimal range and the quality of the mowing operation is guaranteed. When the load is reduced, the power used by the cutting table 14 is reduced. According to the set control algorithm, the walking speed is increased to achieve closed-loop control and ensure mowing efficiency.

[0023] During the mowing operation, if the power distribution cannot ensure that the cutting table speed is within the optimal range, it means that the load encountered is too large and the cutting table 14 is blocked. At this time, the vehicle controller makes another judgment based on the difference between the value fed back by the speed sensor 12 and the given value, and feeds back to the angle sensor 8 according to the set control algorithm, and then controls the lifting of the cutting table 14 through the hydraulic cylinder 9. After the load is reduced, the cutting table 14 is raised to an appropriate height according to the set control algorithm, and the mowing motor 5 reverses to clear the blocked weeds. After the clearing is completed, the operation continues according to the initial set parameters, thereby realizing closed-loop control.

[0024] The present invention makes intelligent control for preventing the cutting table of a hydraulic power lawn mower from being blocked. It makes real-time judgment based on the input parameter value of the speed sensor 12 and the set optimal range speed, and performs precise control through two preset adjustment control algorithms, including adjusting the power distribution and the increase in the height of the cutting table 14, thereby preventing the cutting table from being blocked. If the cutting table is blocked during operation, a control strategy for reversing the mowing motor 5 is provided, so that the grass entangled on the blade shaft 13 is cleared in time, thereby improving the mowing effect and efficiency.

[0025] The present invention adopts control methods including but not limited to fuzzy control and PID control, and sets different PID parameter values ​​for adjustment.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for preventing the cutting table of a hydraulic mower from blocking, comprising an engine (1), a suspension bracket (4) and a cutting table (14), wherein the suspension bracket (4) and the cutting table (14) are connected via a hydraulic cylinder (9), a blade-flinging shaft (13) is arranged in the cutting table (14), and blades are evenly distributed on the outer side of the blade-flinging shaft (13), characterized in that: The flywheel end of the engine (1) is connected to a coupling, the coupling is connected to a triple pump (2), the triple pump (2) is hydraulically connected to a proportional valve (3), the output end of the proportional valve (3) is hydraulically connected to a drive motor (6) and a mowing motor (5), respectively, the output end of the mowing motor (5) is connected to a pulley (10), the pulley (10) is connected to a blade-flinging shaft (13) via a belt (11), an angle sensor (8) is provided on the suspension bracket (4), and a speed sensor (12) is provided on the blade-flinging shaft (13).

2. The anti-blocking device for cutting table operation of a hydraulic power lawn mower according to claim 1, characterized in that: The triple pump (2) is fixed on the flywheel housing of the engine (1) via a flywheel housing cover (7).

3. The anti-blocking device for cutting table operation of a hydraulic power lawn mower according to claim 1, characterized in that: The output ends of the rotation speed sensor (12) and the angle sensor (8) are respectively electrically connected to the input end of the vehicle controller, the output end of the vehicle controller is electrically connected to the input end of the proportional valve (3), and the input end of the hydraulic cylinder (9) is hydraulically connected to the output end of the proportional valve (3).

4. The anti-blocking control method of the anti-blocking device for cutting table operation of a hydraulic power lawn mower according to any one of claims 1 to 3, characterized in that: When the lawn mower is operating normally, the vehicle controller implements the distribution strategy of walking speed and mowing speed according to the initial setting parameters, and the mowing speed is inversely proportional to the walking speed.

5. The method for preventing blockage of a cutting table of a hydraulic mower according to claim 4, characterized in that: When the mowing speed decreases, it means that the load of the cutting table (14) increases. The vehicle controller makes a real-time judgment on the mowing speed based on the difference between the value fed back by the speed sensor (12) and the given value. According to the set control algorithm, the opening of the travel proportional valve is reduced and the opening of the cutting table proportional valve is increased, thereby reducing the travel operation speed and ensuring that the speed of the cutting table (14) is controlled within the optimal range.

6. A method for preventing blockage of a cutting table of a hydraulic mower according to claim 4, characterized in that: When the load is reduced, the power used by the header (14) is reduced, and the travel speed is increased according to the set control algorithm, thereby realizing closed-loop control.

7. The method for preventing blockage of a cutting table of a hydraulic mower according to claim 5, characterized in that: During the mowing operation, if the power distribution cannot ensure that the cutting table speed is within the optimal range, the vehicle controller will make another judgment based on the difference between the value fed back by the speed sensor (12) and the given value, and feed it back to the angle sensor (8) according to the set control algorithm, and then control the lifting of the cutting table (14) through the hydraulic cylinder (9). After the load is reduced, the cutting table (14) is raised to a suitable height according to the set control algorithm, and the mowing motor (5) is reversed to clear the blocked weeds. After the clearing is completed, the operation continues according to the initial set parameters, thereby realizing closed-loop control.

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