Device and method for controlling grass cutting length of green feed harvester

Abstract

The grass cutting length control device comprises a support and a transmission case, a first upper roller, a first lower roller, a second upper roller and a second lower roller are arranged in the support, and the first upper roller and the first lower roller are oppositely arranged up and down; the second upper roller and the second lower roller are oppositely arranged up and down, connecting shafts of the first upper roller, the first lower roller, the second upper roller and the second lower roller are respectively connected with an output shaft of the transmission case, and the first upper roller, the first lower roller, the second upper roller and the second lower roller have the same linear speed; according to the grass cutting length control device and method of the green feed harvester, crop stalks and stems can be pre-pressed and arranged, the stalks and stems are evenly fed into the chopping roller, the situation of blockage before chopping is avoided, meanwhile, the grass cutting length is controlled according to the actual situation, and the bundling quality is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of green forage harvesters, and particularly to a device and method for controlling the cutting length of a green forage harvester. Background Art

[0002] Green forage harvesters are mainly used to harvest low-growing green forage crops such as green grass, oats, and sugar beet leaves. During operation, after the crops are cut by the cutter bar, they are conveyed to the chopping drum through the feeding mechanism for chopping. However, the existing feeding mechanisms are usually composed of only two relatively rotating drums, which cannot play a role in sorting and guiding the crop stalks well, and often cause crop jams. At the same time, the cutting length of the green forage harvester cannot be controlled and is easily affected by the engine speed, resulting in the inability to stack and bale neatly during the baling stage, affecting the baling quality. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a device and method for controlling the cutting length of a green forage harvester, which can pre-press and sort the crop stalks, uniformly feed the stalks into the chopping drum, avoid jams before chopping, and at the same time can control the cutting length, effectively solving the problems in the background art.

[0004] To achieve the above object, the present invention provides the following technical solution: A feeding mechanism of a green forage harvester includes a support and a transmission case. A first upper roller, a first lower roller, a second upper roller, and a second lower roller are arranged in the support. The first upper roller and the first lower roller are arranged opposite to each other up and down, and the second upper roller and the second lower roller are arranged opposite to each other up and down. The connecting shafts of the first upper roller, the first lower roller, the second upper roller, and the second lower roller are respectively connected to the output shaft of the transmission case, and the linear speeds of the first upper roller, the first lower roller, the second upper roller, and the second lower roller are the same;

[0005] The input end of the transmission case is connected to the output end of a variable motor. A speed sensor is arranged on the variable motor. The output end of the speed sensor is electrically connected to the input end of an intelligent control unit. The intelligent control unit is bidirectionally connected to a 10KΩ potentiometer. The output end of the intelligent control unit is electrically connected to the input end of a servo solenoid valve. The output end of the servo solenoid valve is electrically connected to the input end of the variable motor.

[0006] As a preferred technical solution of the present invention, sawteeth are arranged on the outer sides of the first upper roller and the first lower roller, light plates are evenly distributed on the outer side of the second upper roller, and the surface of the second lower roller is smooth.

[0007] As a preferred technical solution of the present invention, the sawteeth on the surfaces of the first upper roller and the first lower roller are fixedly inclined.

[0008] As a preferred technical solution of the present invention, floating mechanisms are provided on both sides of the support. The floating mechanism includes a side plate, a fixing plate and a longitudinal tension spring. The side plate is arranged on one side of the support, the fixing plate is fixedly connected to the support, strip-shaped through holes are provided on the side plate at positions corresponding to the first upper roller and the second upper roller. Both ends of the connecting shaft of the first upper roller pass through the corresponding strip-shaped through holes and are rotatably connected to the side plate through bearings. Both ends of the connecting shaft of the second upper roller pass through the corresponding strip-shaped through holes and the side plate and are rotatably connected to the connecting plate through bearings. The connecting plate is fixedly connected to the fixing plate. One end of the longitudinal tension spring is connected to the support, and the other end of the longitudinal tension spring is connected to the lower end of the side plate.

[0009] As a preferred technical solution of the present invention, the number of the longitudinal tension springs is two.

[0010] As a preferred technical solution of the present invention, the strip-shaped through holes are wider at the top and narrower at the bottom.

[0011] As a preferred technical solution of the present invention, the floating mechanism further includes a transverse tension spring. One end of the transverse tension spring is connected to the fixing plate, and the other end of the transverse tension spring is connected to the side plate.

[0012] A method for controlling the cutting length of a green forage harvester presets the cutting length through a 10KΩ potentiometer. The intelligent control unit outputs a corresponding voltage value to drive the servo solenoid valve to work, thereby adjusting the rotational speed of the variable motor. The speed sensor feeds back the rotational speed of the variable motor to the intelligent control unit, compares it with the preset value in real time, and automatically adjusts the output voltage to be consistent with the preset cutting length.

[0013] As a preferred technical solution of the present invention, the variable motor 16 has a linear proportional relationship with the voltage of the servo solenoid valve.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The cutting length control device and method of the present green forage harvester are compact in structure, reasonable in design and convenient to operate. The crop stalks are guided and conveyed and pre-compressed by the sawteeth on the first upper roller and the first lower roller, and then the stalks are secondarily compressed and conveyed to the chopping roller for chopping by the smooth plate on the second upper roller and the smooth surface of the second lower roller, which can effectively avoid the situation of feeding blockage. At the same time, the speed of the variable motor is fed back and compared with the preset cutting length, and then the speed of the variable motor is adjusted through the servo solenoid valve, and then the linear speeds of the first upper roller 4, the first lower roller 5, the second upper roller 6 and the second lower roller 7 are adjusted to control the feeding length, so as to ensure that the cutting length is controllable, greatly improving the use convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the present invention;

[0016] Figure 2 This is the front view of the present invention;

[0017] Figure 3 is Figure 2 the sectional view taken along line A-A in

[0018] Figure 4 This is the system control diagram of the present invention.

[0019] In the figure: 1 support, 2 mounting frame, 3 transmission box, 4 first upper roller, 5 first lower roller, 6 second upper roller, 7 second lower roller, 8 saw teeth, 9 smooth plate, 10 side plate, 11 fixing plate, 12 longitudinal tension spring, 13 transverse tension spring, 14 strip-shaped through hole, 15 connecting plate, 16 variable motor. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments (for the convenience of description and understanding, hereinafter, the upper part of Figure 2 is described as the upper part). Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0021] Please refer to Figures 1-3 , the present invention provides a technical solution: a feeding mechanism for a green forage harvester, including a support 1 and a transmission box 3. A first upper roller 4, a first lower roller 5, a second upper roller 6 and a second lower roller 7 are arranged in the support 1. The first upper roller 4 and the first lower roller 5 are arranged opposite to each other vertically and have opposite rotation directions. The second upper roller 6 and the second lower roller 7 are arranged opposite to each other vertically and have opposite rotation directions. The channels formed by the first upper roller 4 and the first lower roller 5 and the channels formed by the second upper roller 6 and the second lower roller 7 are located on the same horizontal plane and have the same spacing;

[0022] The connecting shafts of the first upper roller 4, the first lower roller 5, the second upper roller 6 and the second lower roller 7 are respectively connected to the output shaft of the transmission box 3 through universal couplings or flexible shafts, ensuring that when the first upper roller 4, the first lower roller 5, the second upper roller 6 and the second lower roller 7 make small-amplitude vibrations, it does not affect the transmission, and the linear speeds of the first upper roller 4, the first lower roller 5, the second upper roller 6 and the second lower roller 7 are the same, ensuring uniform feeding of crop stalks. Serrations 8 are provided on the outer sides of both the first upper roller 4 and the first lower roller 5. When the crop stalks first enter, the friction with the stalks is increased through the serrations 8, playing a good guiding and pressing role. The outer side of the upper roller 6 is evenly distributed with smooth plates 9, and the surface of the second lower roller 7 is smooth. Through the cooperation of the smooth plates 9 and the smooth surface, it can not only play a secondary pressing role, but also ensure that the stalks can quickly enter the chopping roller without affecting the chopping efficiency.

[0023] Further, the serrations 8 on the surfaces of the first upper roller 4 and the first lower roller 5 are both inclined and fixed, so that when the serrations 8 contact the crop stalks, it is an oblique insertion contact, which is convenient for better directional conveying of the crop stalks.

[0024] Further, floating mechanisms are provided on both sides of the support 1. The floating mechanisms include side plates 10, fixing plates 11 and longitudinal tension springs 12. The side plates 10 are provided on one side of the support 1, the fixing plates 11 are fixedly connected to the support 1, and strip-shaped through holes 14 are provided at the positions corresponding to the first upper roller 4 and the second upper roller 6 on the side plates 10. Both ends of the connecting shaft of the first upper roller 4 pass through the corresponding strip-shaped through holes 14 and are rotatably connected to the side plates 10 through bearings. Both ends of the connecting shaft of the second upper roller 6 pass through the corresponding strip-shaped through holes 14 and the side plates 10 and are rotatably connected to the connecting plate 15 through bearings. The connecting plate 15 is fixedly connected to the fixing plate 11. The number of longitudinal tension springs 12 is two. One end of the longitudinal tension spring 12 is connected to the support 1, and the other end of the longitudinal tension spring 12 is connected to the lower end of the side plate 10. By providing the longitudinal tension springs 12, the first upper roller 4 and the second upper roller 6 can be floated up and down according to the feeding amount, avoiding blockage.

[0025] Further, the shape of the strip-shaped through holes 14 is wider at the top and narrower at the bottom, facilitating the full floating of the connecting shafts of the first upper roller 4 and the second upper roller 6 in the strip-shaped through holes 14.

[0026] Further, the floating mechanism further includes a transverse tension spring 13. One end of the transverse tension spring 13 is connected to the fixing plate 11, and the other end of the transverse tension spring 13 is connected to the side plate 10. By providing the transverse tension spring 13, it is convenient for the first upper roller 4 and the second upper roller 6 to float left and right.

[0027] As Figure 4As shown, the input end of the transmission box 3 is connected to the output end of the variable motor 16. A speed sensor is provided on the variable motor 16. The output end of the speed sensor is electrically connected to the input end of the intelligent control unit. The intelligent control unit is bidirectionally connected to a 10KΩ potentiometer. The output end of the intelligent control unit is electrically connected to the input end of the servo solenoid valve. The output end of the servo solenoid valve is electrically connected to the input end of the variable motor 16;

[0028] The method for controlling the cutting length is as follows: preset the cutting length through a 10KΩ potentiometer. The intelligent control unit outputs a corresponding voltage value to drive the servo solenoid valve to work, and then adjusts the rotational speed of the variable motor 16. There is a linear proportional relationship between the variable motor 16 and the voltage of the servo solenoid valve. The speed sensor feeds back the rotational speed of the variable motor to the intelligent control unit, compares it with the preset value in real time, and automatically adjusts the output voltage to be consistent with the preset cutting length, ensuring that the cutting length is not affected by external factors such as the engine speed.

[0029] During use: preset the cutting length with a 10KΩ potentiometer, compare it with the preset cutting length through the speed feedback of the variable motor 16, and then adjust the speed of the variable motor 16 through the servo solenoid valve, thereby controlling the rotational speeds of the first upper roller 4, the first lower roller 5, the second upper roller 6, and the second lower roller 7; then the crop stalks enter the channel between the first upper roller 4 and the first lower roller 5 after being cut by the cutting table, and are pre-compressed. At the same time, under the action of the saw teeth 8 on the first upper roller 4 and the first lower roller 5, the crop stalks are guided to between the second upper roller 6 and the second lower roller 7. At the same time, the second upper roller 6 and the second lower roller 7 perform secondary compression on the crop stalks and quickly convey them into the cutting roller for cutting. On the premise of controlling its rotational speed, the length of the fed stalks is kept consistent with the preset value, thereby ensuring that the cutting length is controllable.

[0030] The present invention can be conveniently operated, facilitating operation and use; it can effectively avoid the situation of blockage before cutting of crop stalks, greatly improving the convenience of use; at the same time, under the action of the 10KΩ potentiometer and the servo solenoid valve, the speed of the variable motor 16 is controlled in real time, ensuring that the length of the stalks controlled by the variable motor 16 fed into the cutting roller is the same as the preset value, facilitating subsequent baling operations.

[0031] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for controlling the cutting length of a green forage harvester, comprising a support (1) and a transmission box (3), characterized in that: Inside the support (1), a first upper roller (4), a first lower roller (5), a second upper roller (6) and a second lower roller (7) are provided. The first upper roller (4) and the first lower roller (5) are arranged opposite to each other vertically. The second upper roller (6) and the second lower roller (7) are arranged opposite to each other vertically. The connecting shafts of the first upper roller (4), the first lower roller (5), the second upper roller (6) and the second lower roller (7) are respectively connected to the output shaft of the transmission box (3), and the linear speeds of the first upper roller (4), the first lower roller (5), the second upper roller (6) and the second lower roller (7) are the same. The input end of the transmission box (3) is connected to the output end of the variable motor (16). A speed sensor is provided on the variable motor (16). The output end of the speed sensor is electrically connected to the input end of the intelligent control unit. The intelligent control unit is bidirectionally connected to a 10KΩ potentiometer. The output end of the intelligent control unit is electrically connected to the input end of the servo solenoid valve. The output end of the servo solenoid valve is electrically connected to the input end of the variable motor (16).

2. The device for controlling the cutting length of a green forage harvester according to claim 1, characterized in that: Jagged teeth (8) are provided on the outer sides of both the first upper roller (4) and the first lower roller (5). Light plates (9) are evenly distributed on the outer side of the second upper roller (6). The surface of the second lower roller (7) is smooth.

3. The device for controlling the cutting length of a green forage harvester according to claim 1, characterized in that: The jagged teeth (8) on the surfaces of the first upper roller (4) and the first lower roller (5) are all inclined and fixed.

4. The device for controlling the cutting length of a green forage harvester according to claim 1, characterized in that: Floating mechanisms are provided on both sides of the support (1). The floating mechanism includes a side plate (10), a fixing plate (11) and a longitudinal tension spring (12). The side plate (10) is arranged on one side of the support (1). The fixing plate (11) is fixedly connected to the support (1). Strip-shaped through holes (14) are provided on the side plate (10) at positions corresponding to the first upper roller (4) and the second upper roller (6). Both ends of the connecting shaft of the first upper roller (4) pass through the corresponding strip-shaped through holes (14) and are rotatably connected to the side plate (10) through bearings. Both ends of the connecting shaft of the second upper roller (6) pass through the corresponding strip-shaped through holes (14) and the side plate (10) and are rotatably connected to the connecting plate (15) through bearings. The connecting plate (15) is fixedly connected to the fixing plate (11). One end of the longitudinal tension spring (12) is connected to the support (1), and the other end of the longitudinal tension spring (12) is connected to the lower end of the side plate (10).

5. The device for controlling the cutting length of a green forage harvester according to claim 4, characterized in that: The number of the longitudinal tension springs (12) is two.

6. The device for controlling the cutting length of a green forage harvester according to claim 4, characterized in that: The shape of the strip-shaped through hole (14) is wider at the top and narrower at the bottom.

7. The device for controlling the cutting length of a green forage harvester according to claim 4, characterized in that: The floating mechanism further includes a transverse tension spring (13). One end of the transverse tension spring (13) is connected to the fixing plate (11), and the other end of the transverse tension spring (13) is connected to the side plate (10).

8. A method for controlling the cutting length of a green forage harvester according to claim 1, characterized in that: The chopping length is preset through a 10KΩ potentiometer. The intelligent control unit outputs a corresponding voltage value to drive the servo solenoid valve to work, thereby adjusting the rotation speed of the variable motor (16). The speed sensor feeds back the rotation speed of the variable motor to the intelligent control unit, compares it with the preset value in real time, and automatically adjusts the output voltage to be consistent with the preset chopping length.

9. The method for controlling the cutting length of a green forage harvester according to claim 8, characterized in that: The variable motor 16 has a linear proportional relationship with the voltage of the servo solenoid valve.

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