Ground front profiling mechanism of swing cutter

Abstract

The utility model discloses a ground front profiling mechanism for a swing knife, which is applied to a harvester equipped with a swing knife cutting device, and the swing knife cutting device comprises a swing knife assembled on a support frame and a driving mechanism for driving the swing knife to swing left and right; the swinging knife ground front profiling mechanism comprises two profiling assemblies which are distributed in a bilateral symmetry mode, and the two profiling assemblies are installed on the supporting frame through supporting pipes; the profiling assembly comprises a feeler lever support assembled on the supporting pipe, a feeler lever with the upper end hinged to the feeler lever support and an angle sensor installed on the feeler lever support. The middle of the feeler lever is connected with an input rotating shaft of the angle sensor through a connecting rod mechanism, and the lower end of the feeler lever is provided with a contact end for contacting a ridge surface in front of the swing cutter. According to the utility model, the fluctuation condition of the ridge surface in front of the swing cutter is fed back to the harvester in real time through the two profiling assemblies, so that the harvester can predict the fluctuation condition of the ridge surface in front of the swing cutter in advance, the crops for rotation cut by the swing cutter are consistent, and the harvesting quality of the green vegetables is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural harvesting equipment, in particular to a swing knife ground front profiling mechanism. Background Art

[0002] Traditional leafy vegetable harvesting is usually done manually with handheld knives, which is labor-intensive, requires a lot of labor, and has low work efficiency. Existing harvesters have replaced traditional manual operations to a certain extent, reducing labor intensity and improving work efficiency. When the harvester uses a swinging knife to harvest the leafy vegetables in front of it, the ups and downs of the bed surface will affect the harvesting quality of the leafy vegetables, and it is impossible to ensure that the stubble of the leafy vegetables cut by the swinging knife is consistent.

[0003] In the prior art, a Chinese invention patent with the announcement number CN107223401B has disclosed a self-propelled electric green leafy vegetable harvester. The ground profiling mechanism of the harvester only feeds back information about the ups and downs of the bed surface behind the cutter. The harvester cannot predict the ups and downs of the bed surface in front of the cutter in advance based on the information fed back by the ground profiling mechanism, and thus cannot ensure that the stubble of the cut leafy vegetables is consistent, which affects the quality of the leafy vegetable harvest.

[0004] In summary, for a harvester equipped with a swinging blade, the existing ground profiling mechanism cannot meet the harvester's need to predict the undulations of the furrow surface in front of the swinging blade in advance. Utility Model Content

[0005] The utility model aims to provide a swing knife ground front profiling mechanism, which can realize profiling of the furrow surface in front of the swing knife and predict the undulation of the furrow surface in front of the swing knife in advance, so that the swing knife and the furrow surface are always at the harvesting height, thereby ensuring the quality of the harvesting operation.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A swing-knife ground-front profiling mechanism is applied to a harvester equipped with a swing-knife cutting device, wherein the swing-knife cutting device comprises a swing-knife mounted on a support frame and a driving mechanism for driving the swing-knife to swing left and right;

[0008] The front-facing profiling mechanism of the swinging knife ground includes two profiling components which are symmetrically distributed on the left and right sides, and the two profiling components are installed on the support frame through the same support tube; the profiling component includes a feeler rod bracket mounted on the support tube, a feeler rod whose upper end is hinged on the feeler rod bracket, and an angle sensor installed on the feeler rod bracket; the middle part of the feeler rod is connected to the input shaft of the angle sensor through a connecting rod mechanism, and the lower end of the feeler rod is provided with a contact end for contacting the furrow surface in front of the swinging knife.

[0009] The two profiling components provide real-time feedback to the harvester on the undulations of the bed surface in front of the swinging knife, so that the harvester can predict the undulations of the bed surface in front of the swinging knife in advance, thereby making the stubble of the leafy vegetables cut by the swinging knife consistent, thereby ensuring the harvesting quality of the leafy vegetables.

[0010] As a further solution of the utility model, the support tube extends in the left-right direction, and its left and right ends are rotatably mounted on the support frame, and a fine-tuning device for driving the support tube to rotate is connected between the support tube and the support frame. With the above solution, the positions of the two profiling components are fine-tuned synchronously by the fine-tuning device, so that the bottom of the profiling component is close to the bed surface in front of the swing knife.

[0011] As a further solution of the utility model, the fine-tuning device includes an electric push rod fixed on the support frame; the driving end of the electric push rod drives the support tube to rotate through a connecting rod. The above solution effectively drives the support tube to rotate, thereby achieving fine-tuning of the position of the profiling component.

[0012] As a further solution of the utility model, the touch rod bracket is composed of a U-shaped bolt, a touch rod support and a sensor support; the touch rod support is placed on the front side of the rectangular tube, the sensor support is placed on the rear side of the rectangular tube, and the touch rod support, the sensor support and the rectangular tube are fixedly connected by the U-shaped bolt. The above solution is adopted to enable the touch rod bracket to be assembled on the support tube.

[0013] As a further solution of the utility model, the support tube is a rectangular tube with a rectangular cross section. The above solution is adopted so that the feeler rod bracket can be assembled on the support tube. In addition, since the length of the diagonal of the rectangular tube cross section is greater than the width and height of the rectangular tube, the rectangular tube can increase the fine-tuning range of the fine-tuning device compared to the circular tube.

[0014] As a further solution of the utility model, the connecting rod mechanism is composed of a first connecting rod and a second connecting rod, the first connecting rod is a connecting rod with adjustable length; one end of the first connecting rod is hinged to the middle of the contact rod, and the other end is hinged to one end of the second connecting rod, and the other end of the second connecting rod is fixedly connected to the input shaft of the angle sensor. With the above solution, the contact end position can be fine-tuned by adjusting the length of the first connecting rod.

[0015] As a further solution of the utility model, a compression spring is provided between the touch rod bracket and the touch rod. With the above solution, under the action of the compression spring, the bottom of the profiling component is always in contact with the furrow surface in front of the swing knife.

[0016] As a further solution of the utility model, the contact rod bracket is provided with a limit column for limiting the movement of the connecting rod mechanism. By adopting the above solution, by limiting the movement of the connecting rod mechanism, the rotation range of the input shaft of the angle sensor is indirectly limited, preventing the input shaft from rotating at an angle exceeding the range of the angle sensor, thereby improving the stability of the profiling operation of the profiling component.

[0017] As a further solution of the utility model, the free end of the touch rod contacts the furrow surface through a profiling wheel. The above solution is adopted to make the contact between the furrow surface profiling device and the furrow surface smoother.

[0018] As a further solution of the utility model, the angle sensor is electrically connected to the controller of the harvester; the controller controls the corresponding hydraulic cylinder to adjust the left and right sides of the swing knife cutting device according to the signal fed back by the angle sensor. With the above solution, under the premise of ensuring the harvesting height, the profiling component can adjust the hydraulic cylinder according to the flatness of the bed surface and the change of the ground surface height, so as to keep the swing knife level with respect to the bed surface, thereby making the stubble of the cut green leafy vegetables consistent, thereby ensuring the harvesting quality of the green leafy vegetables.

[0019] Beneficial effects of the utility model:

[0020] The two profiling components provide real-time feedback to the harvester on the ups and downs of the furrow surface in front of the swing blade, so that the harvester can predict the ups and downs of the furrow surface in front of the swing blade in advance;

[0021] Under the premise of ensuring the harvesting height, the profiling component can adjust the hydraulic cylinder according to the flatness of the bed surface and the change of the ground height to keep the swing knife level with the bed surface, so as to make the stubble of the cut green leafy vegetables consistent, thereby ensuring the harvesting quality of the green leafy vegetables;

[0022] Before the harvester starts harvesting, the bottoms of the two contoured components can be just fitted to the bed surface in front of the swing knife through the cooperation of the fine-adjusting device and the first connecting rod, so as to adapt to the harvesting of green leafy vegetables of different varieties and growth densities;

[0023] When the harvester is harvesting, the bottom of the profiling component is always in contact with the furrow surface in front of the swing knife through the action of the compression spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described below in conjunction with the accompanying drawings:

[0025] Figure 1 It is a three-dimensional structural schematic diagram of a harvester equipped with the utility model;

[0026] Figure 2 It is a schematic diagram of the walking chassis of the harvester;

[0027] Figure 3It is a three-dimensional structural schematic diagram of the utility model installed on the swing knife cutting device;

[0028] Figure 4 It is a schematic diagram of the utility model installed on a swing knife cutting device;

[0029] Figure 5 It is a three-dimensional structural schematic diagram of the utility model;

[0030] Figure 6 It is a partial cross-sectional structural schematic diagram of the utility model installed on the swing knife cutting device;

[0031] Figure 7 yes Figure 6 A magnified schematic diagram of center A.

[0032] The accompanying drawings are denoted as follows:

[0033] 10. Profiling assembly; 11. Touch rod bracket; 111. U-bolt; 112. Touch rod support; 113. Sensor support; 12. Touch rod; 13. Link mechanism; 131. First link; 132. Second link; 14. Angle sensor; 15. Profiling wheel; 16. Limiting column; 17. Compression spring;

[0034] 20. Connecting bracket; 21. Folding plate; 22. Supporting tube;

[0035] 30. Fine adjustment device; 31. Electric push rod; 32. Connecting rod;

[0036] 40. Walking chassis; 41. Hydraulic cylinder; 41a. Left hydraulic cylinder; 41b. Right hydraulic cylinder; 42. Support frame of conveyor platform;

[0037] 50. Swinging knife cutting device; 51. Support frame; 52. Swinging knife;

[0038] 60. Conveyor platform. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] A swing-knife ground-front profiling mechanism can be applied to a harvester equipped with a swing-knife cutting device 50.

[0041] In this embodiment, the harvester includes a controller, a walking chassis 40 for walking, a swinging knife cutting device 50 for cutting green leafy vegetables, and a conveying platform 60 for conveying the cut green leafy vegetables upward to a vegetable basket. Figure 1 As shown, the conveyor platform 60 is installed above the traveling chassis 40 in a shape of low front and high rear. The conveyor platform 60 includes a conveyor belt and a bracket for supporting the conveyor belt. The bracket is composed of a front crossbeam located at the front end of the bottom of the conveyor belt, a middle crossbeam located at the middle position of the bottom of the conveyor belt, a rear crossbeam located at the rear end of the bottom of the conveyor belt, a conveyor belt support frame located inside the conveyor belt, and left and right baffles arranged on the left and right sides of the conveyor belt. The above three crossbeams all extend in the left and right directions. A conveyor platform support frame 42 for supporting the conveyor platform is provided at the middle and rear part of the traveling chassis 40. The conveyor platform support frame 42 is a gantry-shaped structure, and the middle part of the rear crossbeam is hinged to the middle part of the top crossbeam of the conveyor platform support frame 42 through a hinge seat. The left and right sides of the conveyor platform 60 are distributed with a left hydraulic cylinder 41a and a right hydraulic cylinder 41b. One end of the hydraulic cylinder 41 is hinged to the end of the middle crossbeam, and the other end is hinged to the traveling chassis 40. The swing knife cutting device 50 is installed at the front end of the conveyor platform 60. The swing knife ground front profiling mechanism is installed on the swing knife cutting device 50. The swing knife ground front profiling mechanism, the walking chassis 40, the swing knife cutting device 50 and the conveying platform 60 are electrically connected to the controller respectively.

[0042] Among them, the assembly structure between the conveying platform 60 and the walking chassis 40 is a prior art. The relevant structure is mentioned in the Chinese invention publication number CN107223401B, so it will not be repeated here.

[0043] like Figure 2 to Figure 4 As shown, the swing knife cutting device 50 includes a support frame 51 arranged in front of the conveying platform 60, a swing knife 52 placed below the support frame 51 and extending in the left and right directions, and a driving mechanism for driving the swing knife 52 to swing left and right. The support frame 51 is gantry-shaped, and has left and right vertical beams and a connecting crossbeam for connecting the left and right vertical beams. The left and right vertical beams are respectively fixed to the left and right baffles of the conveying platform 60 by angle irons. The driving mechanism is fixed to the support frame 51 and is electrically connected to the controller. The driving mechanism indirectly drives the swing knife 52 to swing left and right through a swing rod mechanism. The blade of the swing knife 52 is arranged forward, so that the swing knife 52 that swings left and right can effectively cut the green leafy vegetables in front of it. Since the swing knife cutting device 50 is a prior art, it is not repeated here.

[0044] like Figure 2 and Figure 5 As shown, the swing knife ground front profiling mechanism comprises two profiling components 10. The two profiling components 10 are arranged on the support frame 51 in a left-right symmetrical distribution. The bottom of the profiling component 10 is used to contact the furrow surface in front of the swing knife 52.

[0045] Furthermore, the two profiling components 10 are mounted on the support frame 51 through the connecting bracket 20. Specifically, the connecting bracket 20 is composed of two folding plates 21 and a support tube 22. The two folding plates 21 are symmetrically distributed on the left and right sides, respectively fixing the front sides of the left and right vertical beams. The support tube 22 extends in the left and right directions, and its left and right ends are rotatably mounted on the corresponding folding plates 21 through bearing seats, so that the support tube 22 can be rotatably mounted between the two folding plates 21. A fine-tuning device 30 is connected between the support tube 22 and the support frame 51. Specifically, the fine-tuning device 30 includes an electric push rod 31 fixed on the support frame 51 and a connecting rod 32 provided between the protruding end of the electric push rod 31 and the support tube 22. The electric push rod 31 is electrically connected to the controller. One end of the connecting rod 32 is hinged to the protruding end of the electric push rod 31, and the other end is fixedly connected to the support tube 22. The extended end of the electric push rod 31 performs linear motion in the front-rear direction, thereby driving the connecting rod 32 to swing back and forth, and the connecting rod 32 drives the support tube 22 to rotate, so that the bottoms of the two profiling components 10 move upward or downward synchronously, thereby making the bottoms of the two profiling components 10 close to the furrow surface in front of the swing knife 52.

[0046] The support tube 22 includes but is not limited to a circular tube, a rectangular tube, etc. Since the length of the diagonal of the cross section of the rectangular tube is greater than the width and height of the rectangular tube, the rectangular tube can increase the fine-tuning range of the fine-tuning device 30 compared to the circular tube. Therefore, in this embodiment, the support tube 22 is a rectangular tube.

[0047] like Figure 2 and Figure 5 As shown, two profiling components 10 are symmetrically mounted on the left and right parts of the support tube 22 through corresponding feeler rod brackets 11. Specifically, the profiling component 10 includes a feeler rod bracket 11 fixed on the support tube 22, a feeler rod 12 hinged to the feeler rod bracket 11, and an angle sensor 14 mounted on the feeler rod bracket 11. The feeler rod 12 is connected to the input shaft of the angle sensor 14 through a connecting rod mechanism 13. The angle sensor 14 is electrically connected to the controller.

[0048] The feeler rod support 11 is composed of a feeler rod support 112 and a sensor support 113. The feeler rod support 112 is placed on the front side of the support tube 22, and the sensor support 113 is placed on the rear side of the support tube 22. The feeler rod support 112, the sensor support 113 and the support tube 22 are fixedly connected by a U-bolt 111. In this embodiment, since the support tube 22 is a rectangular tube, relative rotation between the feeler rod support 11 and the support tube 22 can be effectively prevented.

[0049] The feeler rod 12 is an inclined rod that is higher in the front and lower in the back. The front end of the feeler rod 12 is hinged on the feeler rod support 112, and the rear end of the feeler rod 12 is a contact end for contacting the furrow surface. The contacting mode between the contact end and the furrow surface includes but is not limited to direct contact with the furrow surface and indirect rolling contact with the furrow surface through the profiling wheel 15. In this embodiment, the contact end of the feeler rod 12 is in indirect rolling contact with the furrow surface through the profiling wheel 15. The profiling wheel 15 is installed at the contact end of the corresponding feeler rod 12 and is located directly in front of the swing knife 52.

[0050] The angle sensor 14 is mounted on the sensor support 113, and the input shaft of the angle sensor 14 extends in the left-right direction. The connecting rod mechanism 13 includes a first connecting rod 131 extending in the up-down direction and a second connecting rod 132 extending in the front-back direction. The front end of the second connecting rod 132 is provided with a waist hole along its length direction. The middle part of the touch rod 12 is hinged to the lower end of the first connecting rod 131, the upper end of the first connecting rod 131 is hinged to the front end of the second connecting rod 132, and the rear end of the second connecting rod 132 is fixed to the input shaft of the angle sensor 14. In this embodiment, the first connecting rod 131 is a connecting rod with adjustable length.

[0051] Furthermore, a compression spring 17 is connected between the middle and rear portion of the touch rod 12 and the sensor support 113 .

[0052] Furthermore, two limit posts 16 are fixed to the sensor support 113. The two limit posts 16 are distributed above and below the second connecting rod 132, and are used to limit the swing amplitude of the second connecting rod 132, thereby preventing the angle of rotation of the input shaft of the angle sensor 14 from exceeding the range of the angle sensor 14, thereby improving the stability of the profiling operation of the profiling component 10.

[0053] The specific working principle of the swing knife ground front profiling mechanism is as follows:

[0054] Before the harvester equipped with the swing blade ground front profiling mechanism starts harvesting, the controller controls the hydraulic cylinder 41 to lower the conveying platform 60 to the working position to adapt to the harvesting of green leafy vegetables of different varieties and growth densities. After the conveying platform 60 is lowered to the working position, the controller controls the extended end of the electric push rod 31 to move in the front-back direction, so that the connecting rod 32 drives the support tube 22 to rotate, and the support tube 22 drives the contact ends of the two profiling components 10 to move upward or downward synchronously, so that the bottoms of the two profiling components 10 are close to the furrow surface in front of the swing blade 52. Thereafter, by adjusting the length of the first connecting rod 131, the bottoms of the two profiling components 10 are just fitted to the furrow surface in front of the swing blade 52.

[0055] Then, the controller starts the traveling chassis 40, the swinging blade cutting device 50 and the conveying platform 60. The traveling chassis 40 drives the harvester to move forward, and at the same time, the driving mechanism drives the swinging blade 52 to cut the green leafy vegetables in front of it. The cut green leafy vegetables are sent upward to the vegetable basket (not shown in the figure) by the conveying platform 60.

[0056] When the harvester moves forward and harvests, when the furrow surface in front of the swinging blade 52 fluctuates, the contour wheel 15 is acted upon by the compression spring 17 so that the bottom of the contour wheel 15 always fits the furrow surface in front of the swinging blade 52, so the contour wheel 15 is lifted and lowered accordingly according to the fluctuation of the furrow surface at its bottom. When the contour wheel 15 is lifted and lowered, the contour wheel 15 indirectly drives the input shaft of the angle sensor 14 to rotate through the touch rod 12 and the connecting rod mechanism 13. The angle sensor 14 feeds back the detected angle data to the controller; the controller controls the hydraulic cylinder 41 on the same side of the angle sensor 14 to lift and lower according to the signal fed back by the angle sensor 14, so as to adjust the position of the conveying platform 60, keep the swinging blade 52 level with respect to the furrow surface, that is, the swinging blade 52 and the furrow surface are always at the harvesting height, so as to ensure the quality of the harvested vegetables.

[0057] Specifically, take the profiling assembly 10 located at the right part of the support tube 22 as an example. When the right side of the furrow surface in front of the swing knife 52 is concave downward, the profiling wheel 15 moves downward under the action of the compression spring 17, and drives the touch rod 12 to swing downward at the same time; the touch rod 12 drives the first connecting rod 131 to move downward, the first connecting rod 131 drives the second connecting rod 132 to swing downward, and the second connecting rod 132 drives the input shaft of the angle sensor 14 to rotate counterclockwise. The controller controls the right hydraulic cylinder 41b to descend according to the signal fed back by the angle sensor 14, so that the right side of the conveying platform 60 follows the descent, and then the right side of the swing knife 52 and the furrow surface are always at the harvesting height. On the contrary, when the right side of the furrow surface in front of the swing knife 52 is convex upward, the profiling wheel 15 indirectly drives the input shaft of the angle sensor 14 to rotate clockwise, and the controller controls the right hydraulic cylinder 41b to ascend, so that the right side of the swing knife 52 and the furrow surface are always at the harvesting height.

[0058] Similarly, when the left side of the front edge of the swing blade 52 is sunken downward, the controller controls the left hydraulic cylinder 41a to descend according to the signal fed back by the angle sensor 14 located at the left part of the support tube 22, so that the left side of the swing blade 52 and the edge surface are always at the harvesting height. When the left side of the front edge of the swing blade 52 is raised upward, the controller controls the left hydraulic cylinder 41a to ascend, so that the left side of the swing blade 52 and the edge surface are always at the harvesting height.

[0059] The utility model uses two profiling components 10 to feed back the undulation of the furrow surface in front of the swinging blade 52 to the harvester in real time, so that the harvester can predict the undulation of the furrow surface in front of the swinging blade 52 in advance; under the premise of ensuring the harvesting height, the profiling component 10 can adjust the hydraulic cylinder 41 according to the flatness of the furrow surface and the change of the surface height, so as to keep the swinging blade 52 level relative to the furrow surface, thereby making the stubble of the cut green leafy vegetables consistent, thereby ensuring the harvesting quality of the green leafy vegetables; before harvesting, through the cooperation of the fine-tuning device 30 and the first connecting rod 131, the bottom of the two profiling components 10 can be just fitted to the furrow surface in front of the swinging blade 52, so as to adapt to the harvesting of green leafy vegetables of different varieties and growth densities; when the harvester is harvesting, through the action of the compression spring 17, the bottom of the profiling component 10 is always in contact with the furrow surface in front of the swinging blade 52.

[0060] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of patent protection of the utility model.

Claims

1. A swing-blade ground-front profiling mechanism, applied to a harvester equipped with a swing-blade cutting device (50), wherein the swing-blade cutting device (50) comprises a swing-blade (52) mounted on a support frame (51) and a driving mechanism for driving the swing-blade (52) to swing left and right, characterized in that: The swing knife ground front profiling mechanism comprises two profiling components (10) which are symmetrically distributed on the left and right sides, and the two profiling components (10) are installed on the support frame (51) through the same support tube (22); the profiling component (10) comprises a feeler rod bracket (11) mounted on the support tube (22), a feeler rod (12) whose upper end is hinged on the feeler rod bracket (11), and an angle sensor (14) installed on the feeler rod bracket (11); the middle part of the feeler rod (12) is connected to the input shaft of the angle sensor (14) through a connecting rod mechanism (13), and the lower end of the feeler rod (12) is provided with a contact end for contacting the ridge surface in front of the swing knife (52).

2. The swing knife ground front profiling mechanism according to claim 1 is characterized in that: The support tube (22) extends in the left-right direction, and its left and right ends are rotatably mounted on the support frame (51). A fine-tuning device (30) for driving the support tube (22) to rotate is connected between the support tube (22) and the support frame (51).

3. The swing knife ground front profiling mechanism according to claim 2 is characterized in that: The fine-tuning device (30) comprises an electric push rod (31) fixed on the support frame (51); the driving end of the electric push rod (31) drives the support tube (22) to rotate via a connecting rod (32).

4. The swing knife ground front profiling mechanism according to claim 1, characterized in that: The touch rod support (11) is composed of a U-shaped bolt (111), a touch rod support (112) and a sensor support (113); the touch rod support (112) is placed on the front side of the support tube (22), and the sensor support (113) is placed on the rear side of the support tube (22); the touch rod support (112), the sensor support (113) and the support tube (22) are fixedly connected by the U-shaped bolt (111).

5. The swing knife ground front profiling mechanism according to claim 1, characterized in that: The support tube (22) is a rectangular tube with a rectangular cross section.

6. The swing knife ground front profiling mechanism according to claim 1, characterized in that: The connecting rod mechanism (13) is composed of a first connecting rod (131) and a second connecting rod (132), wherein the first connecting rod (131) is a connecting rod with adjustable length; one end of the first connecting rod (131) is hinged to the middle part of the touch rod (12), and the other end of the first connecting rod (131) is hinged to one end of the second connecting rod (132), and the other end of the second connecting rod (132) is fixedly connected to the input shaft of the angle sensor (14).

7. The swing blade ground front profiling mechanism according to claim 1, characterized in that: A compression spring (17) is provided between the touch rod bracket (11) and the touch rod (12).

8. The swing knife ground front profiling mechanism according to claim 1, characterized in that: The contact rod bracket (11) is provided with a limiting column (16) for limiting the movement of the connecting rod mechanism (13).

9. The swing knife ground front profiling mechanism according to claim 1, characterized in that: The free end of the feeler rod (12) contacts the bed surface via a contour wheel (15).

10. The swing blade ground front profiling mechanism according to claim 1, characterized in that: The angle sensor (14) is electrically connected to a controller of the harvester; the controller controls the corresponding hydraulic cylinder (41) to adjust the left and right sides of the swing knife cutting device (50) according to the signal fed back by the angle sensor (14).

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