Follow-up profiling ditching device of agricultural machine

Abstract

The utility model belongs to the field of agricultural machinery, and particularly relates to an agricultural machinery follow-up profiling ditching device which comprises a fixing frame connected with a traction machine and a ditching blade arranged on the fixing frame, and is characterized by further comprising a four-bar mechanism and a profiling wheel, the front end of the four-bar mechanism is connected with the fixing frame, and the rear end of the four-bar mechanism is connected with the profiling wheel. A hinge shaft of the four-bar mechanism is parallel to the axis of the profiling wheel, the rear end of the furrowing blade and the profiling wheel are connected with the rear end of the four-bar mechanism respectively and located on the left side and the right side of the four-bar mechanism side by side, and mechanical furrowing operation with the approximately same furrowing depth in areas with uneven ground is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of agricultural machinery, specifically relates to a kind of agricultural machinery follow-up profiling ditching device. BACKGROUND

[0002] The existing agricultural machine ditching is generally only applicable to the relatively flat land in plain area, and it is easy to cause large difference in ditching depth when using agricultural machine to ditch in hilly, mountainous or other uneven ground area, thereby leading to uneven seeding depth of crops, affecting the emergence rate of crops and the growth of crops, so that manual ditching and seeding are still mainstream, time-consuming and labor-intensive. CONTENT OF UTILITY MODEL

[0003] In order to solve the problems existing in the prior art, the utility model provides an agricultural machinery follow-up profiling ditching device, which can reduce the large error of ditching depth caused by ground undulation and realize approximately the same ditching depth and seeding depth.

[0004] The specific technical scheme adopted by the utility model is as follows:

[0005] An agricultural machinery follow-up profiling ditching device comprises a fixed frame connected with a traction machine and a ditching shovel arranged on the fixed frame, and the key lies in further comprising a four-bar linkage mechanism and a profiling wheel, the front end of the four-bar linkage mechanism is connected with the fixed frame, the hinge shaft of the four-bar linkage mechanism is arranged in parallel with the axis of the profiling wheel, and the rear end of the ditching shovel and the profiling wheel are respectively connected with the rear end of the four-bar linkage mechanism and are side by side located on the left and right sides of the four-bar linkage mechanism.

[0006] The four-bar linkage mechanism comprises a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod which are sequentially hingedly connected, the first connecting rod is arranged along the height direction and connected with the fixed frame, the ditching shovel is fixedly connected with the third connecting rod by means of a connecting plate and located in front of the profiling wheel, the bottom of the connecting plate is higher than the height of the soil ridge turned over by the ditching, and the profiling wheel is connected with the extension end of the fourth connecting rod.

[0007] A spring is arranged between the first connecting rod and the third connecting rod in an inclined manner, the lower end of the spring is connected with the first connecting rod, and the upper end of the spring is connected with the third connecting rod.

[0008] The ditching width of the ditching shovel is L1, the distance between the edge of the ditching shovel and the profiling wheel is L2, and L1 is 0.8-1.2 times of L2.

[0009] A soil baffle is further arranged on the four-bar linkage mechanism between the ditching shovel and the profiling wheel, and the soil baffle is arranged in matched manner with the soil outlet end of the ditching shovel.

[0010] The upper end of the soil retaining plate is hinged with the first connecting rod, the hinge shaft of the soil retaining plate is arranged in parallel with the axis of the profiling wheel, and the bottom of the front edge of the soil retaining plate is provided with a guide foot.

[0011] The lower part of the four-connecting-rod mechanism is provided with a limiting rod, and the limiting rod limits the angle of downward swing of the four-connecting-rod mechanism.

[0012] The utility model discloses the beneficial effect is:

[0013] The utility model discloses the four connecting rod mechanism with profiling wheel is set up on the fixed frame, and the ditching shovel is installed on the four connecting rod mechanism, and the profiling wheel is combined with the ground and walks and lifts and lowers with the ground with the help of four connecting rod mechanism, and the ditching shovel is followed with the profiling wheel, and the ditching depth error caused by the ground fluctuation is reduced too much, thereby realizing the mechanized ditching operation of the roughly same ditching depth in the uneven ground area, and the crop sowing depth is roughly same, and the emergence time is consistent, and the emergence rate is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structural schematic diagram of the utility model;

[0015] Figure 2 It is the structural schematic diagram of the utility model after removing the soil retaining plate;

[0016] Figure 3 It is the plan view of the utility model;

[0017] Figure 4 It is the front view of the utility model;

[0018] In the drawings, 1, fixed frame, 2, ditching shovel, 3, four connecting rod mechanism, 301, first connecting rod, 302, first connecting rod, 303, second connecting rod, 304, second connecting rod, 4, profiling wheel, 5, spring, 6, soil retaining plate, 7, connecting plate, 8, limiting rod, 9, guide foot, 10, front edge, arrow represents the walking direction of traction machine. DETAILED DESCRIPTION

[0019] The utility model will be further described in connection with the drawings and specific embodiment:

[0020] The specific embodiment is as follows: Figures 1-4As shown, the utility model relates to a kind of agricultural machinery follow-up profiling ditching device, including the fixed frame 1 connected with tractor, ditching shovel 2, four-bar linkage 3 and profiling wheel 4, the front end of four-bar linkage 3 is connected with fixed frame 1, the hinge shaft of four-bar linkage 3 is parallel with the axis of profiling wheel 4, the rear end of ditching shovel 2, profiling wheel 4 respectively with the rear end of four-bar linkage 3 connection and side by side in the left and right sides of four-bar linkage 3, when tractor hauls the ditching device and carries out ditching operation, when passing undulating ground, using the linkage of four-bar linkage 3 and gravity effect, make profiling wheel 4 always with ground close, the rear end of ditching shovel 2 and profiling wheel 4 are side by side arrangement, when meet undulating, simultaneously produce lifting, prevent the difference of ditching depth caused by ground undulating too big influence emergence rate and crop growth.Utilize this follow-up profiling ditching device can effectively reduce the difference of ditching depth caused by ground undulating, and layout is more reasonable, compact structure, effectively shorten the overall length of this follow-up profiling ditching device, with good flexibility.

[0021] Four-bar linkage 3 is parallel four-bar linkage, four-bar linkage 3 includes first connecting rod 301, second connecting rod 302, third connecting rod 303 and fourth connecting rod 304 in turn hinged, the first connecting rod 301 is along height direction and is connected with fixed frame 1, i.e. third connecting rod 303 is along height direction arrangement;The rear end of ditching shovel 2 is fixed with third connecting rod 303 by connecting plate 7 and is located in the front of profiling wheel 4, the bottom of connecting plate 7 is higher than the height of soil ridge turned over by ditching, prevent connecting plate 7 from scraping soil when passing ridge top and make soil backfill to ditch to cause the non-compliance of ditching depth, simultaneously prevent soil from falling in the front of profiling wheel 4 and make ground undulating, the extension end of profiling wheel 4 is connected with fourth connecting rod 304.Profiling wheel 4 is always combined with ground under the action of gravity and walks, when walking to undulating ground, profiling wheel 4 is raised or lowered, four-bar linkage 3 swings with the change of the height of profiling wheel 4 at this time, to make ditching shovel 2 raise or lower with the change of the height of profiling wheel 4, reduce the difference of ditching depth;Because ditching shovel 2 is connected with third connecting rod 303, and profiling wheel 4 is connected with fourth connecting rod 304, therefore, the degree of change of the height of ditching shovel 2 with ground undulating is slightly less than the degree of change of the height of profiling wheel 4 with ground undulating, reduce the difference of ditching depth, also can buffer the impact force between ditching shovel 2 and soil due to ground undulating, especially when undulating sharply, reduce the damage of ditching shovel 2, prolong the service life of ditching shovel 2.

[0022] Further, spring 5 is arranged between first connecting rod 301 and third connecting rod 303, specifically, spring 5 is arranged downward along the walking direction of tractor, i.e. the lower end of spring 5 is connected with first connecting rod 301, the upper end of spring 5 is connected with third connecting rod 303, the rebound force of spring 5 itself makes four-bar linkage 3 keep relatively stable state, always keep profiling wheel 6 and ground close walking.

[0023] The distance between the furrowing shovel 2 and the traveling path of the profiling wheel 4 is kept adjacent, the height error is reduced, the problem of the furrowing shovel 2 and the profiling wheel 4 passing through the ground with a large height difference to cause the furrowing depth to be uneven is prevented, on the other hand, the furrowing shovel 2 provides a storage position for the soil, the soil forms a ridge, and the profiling wheel 4 is spaced apart from the ridge, preventing the soil from sliding into the path of the profiling wheel 4 to cause the ground height error to affect the furrowing depth.

[0024] The furrowing device also includes a soil detection device, which detects the soil while the furrowing shovel 2 is furrowing. The soil detection device includes a machine box and a probe, wherein the machine box is installed on the connecting plate 7, the furrowing shovel 2 includes a bottom plate and a V-shaped shovel head arranged on the bottom plate, the probe is embedded on the bottom plate of the furrowing shovel 2, the V-shaped shovel head of the furrowing shovel 2 is located at the front end of the bottom plate and first contacts the soil to furrow, preventing the probe of the soil detection device from colliding with the soil, and the bottom plate of the furrowing shovel 2 combines with the V-shaped shovel head to smooth the groove bottom of the furrow formed by the furrowing shovel 2, so that the detection height of the probe of the soil detection device and the soil surface always remains consistent, ensuring the accuracy of the detection data. The furrowing shovel 2 forms an anti-collision protection unit of the soil detection device.

[0025] The four-bar linkage mechanism 3 is also provided with a soil baffle 6 between the furrowing shovel 2 and the profiling wheel 4, which is matched with the soil outlet end of the furrowing shovel 2. The soil baffle 6 blocks the soil turned over by the furrowing shovel 2, preventing the soil from sliding into the path of the profiling wheel 4 to cause the local ground height to rise and affect the accuracy of the furrowing depth, and the setting of the soil baffle 6 enables the profiling wheel 4 to be in close contact with the original ground to walk, further ensuring that the furrowing depth remains approximately the same;

[0026] Specifically, the upper end of the soil baffle 6 is hinged to the first connecting rod 301, the hinge shaft of the soil baffle 6 is arranged in parallel with the axis of the profiling wheel 4, the bottom of the front edge 10 of the soil baffle 6 is provided with a guide foot 9, and the hinge shaft of the soil baffle 6 is arranged adjacent to the front edge 10; the soil baffle 6 can swing with the change of the ground height, preventing the soil baffle 6 from colliding with the raised ground and reducing the resistance to furrowing operation in uneven fields; when passing through the initial end of the raised ground, the guide foot 9 at the bottom of the soil baffle 6 slowly contacts the raised ground and swings under the push of the raised ground, while the bottom of the soil baffle 6 still blocks the soil of the lower ground, preventing the front edge 10 of the soil baffle 6 from prematurely contacting the raised ground and swinging, improving the blocking effect of the soil baffle 6 on the soil turned over by the furrowing shovel 2 when encountering the raised ground, and reducing the influence of soil sliding on the height of the profiling wheel 4.

[0027] Further, a limiting rod 8 is arranged below the four-bar linkage mechanism 3, which limits the angle of downward swing of the four-bar linkage mechanism 3. Specifically, the limiting rod is arranged at the lower end of the first connecting rod 301 to limit the angle of downward swing of the fourth connecting rod 304, further improving the stability of the four-bar linkage mechanism 3.

Claims

1. A follow-up contour trenching device for agricultural machinery, comprising a fixed frame (1) connected to a tractor and a trenching shovel (2) arranged on the fixed frame (1), characterized in that: The invention also includes a four-bar linkage (3) and a contour wheel (4), wherein the front end of the four-bar linkage (3) is connected to the fixed frame (1), the hinge axis of the four-bar linkage (3) is arranged in parallel with the axis of the contour wheel (4), and the rear end of the trenching shovel (2) and the contour wheel (4) are respectively connected to the rear end of the four-bar linkage (3) and are located side by side on the left and right sides of the four-bar linkage (3).

2. The agricultural machinery follow-up contour ditching device according to claim 1, characterized in that: The four-link mechanism (3) includes a first link (301), a second link (302), a third link (303) and a fourth link (304) which are hinged in sequence at the head and tail ends. The first link (301) is arranged in the height direction and is connected to the fixed frame (1). The trenching shovel (2) is fixedly connected to the third link (303) by means of a connecting plate (7) and is located in front of the contour wheel (4). The bottom of the connecting plate (7) is higher than the height of the soil ridge turned out by the trenching. The contour wheel (4) is connected to the extended end of the fourth link (304).

3. The agricultural machinery follow-up contour ditching device according to claim 2, characterized in that: A spring (5) is obliquely arranged between the first connecting rod (301) and the third connecting rod (303), wherein the lower end of the spring (5) is connected to the first connecting rod (301) and the upper end is connected to the third connecting rod (303).

4. The agricultural machinery follow-up contour ditching device according to claim 1, characterized in that: The trenching width of the trenching shovel (2) is L1, the distance between the edge of the trenching shovel (2) and the contour wheel (4) is L2, and the L1 is 0.8-1.2 times of L2.

5. The agricultural machinery follow-up contour ditching device according to claim 2, characterized in that: The four-link mechanism (3) is further provided with a retaining plate (6) located between the trenching shovel (2) and the contour wheel (4); the retaining plate (6) is matched with the excavation end of the trenching shovel (2).

6. The agricultural machinery follow-up contour ditching device according to claim 5, characterized in that: The upper end of the retaining plate (6) is hinged to the first connecting rod (301), the hinge axis of the retaining plate (6) is arranged parallel to the axis of the contour wheel (4), the bottom of the front edge (10) of the retaining plate (6) is provided with a guide foot (9), and the hinge axis of the retaining plate (6) is arranged adjacent to the front edge (10).

7. The agricultural machinery follow-up contour ditching device according to claim 1, characterized in that: A limiting rod (8) is provided below the four-bar linkage (3), and the limiting rod (8) limits the downward swing angle of the four-bar linkage (3).

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