Height Adjustment and Adaptive Oscillating Transmission Device and Method for Adjusting Weeding Components

Abstract

This invention discloses a height adjustment and adaptive swing transmission device and a method for adjusting the weeding components. In this invention, the main adjustment frame and the slave adjustment frame are fixed to both ends of the main beam; the two ends of the rotating shaft form a rotating pair with the main adjustment frame and the slave adjustment frame; one end of lifting plate one and lifting plate two are fixed to both ends of the rotating shaft, and the other end forms a slotted pin pair with lifting connecting plate one and lifting connecting plate two respectively; lifting connecting plate one and lifting connecting plate two form a sliding pair with the main adjustment frame and the slave adjustment frame respectively; the two ends of the intermediate shaft form a rotating pair with the input transmission box and the output transmission box fixed on the main beam; the rotating fixed bracket forms a rotating pair with the output transmission box. This invention achieves synchronous rising or falling of each weeding component through an active adjustment mechanism and a driven adjustment mechanism, avoiding the occurrence of mechanism jamming; this invention achieves continuous power input to the weeding device under unbalanced conditions through differential transmission between the steering bevel gear two and the output bevel gear.

Description

Technical Field

[0001] This invention belongs to the field of agricultural machinery, specifically relating to a height adjustment and adaptive swing transmission device and a method for adjusting weeding components. Background Technology

[0002] In the rice cultivation process, during the 3-5 leaf stage, it is necessary to cultivate and weed the paddy fields to remove weeds and increase rice yield. Currently, there are various paddy field cultivation and weeding machines that can effectively remove weeds. However, the paddy field environment is complex. To adapt to varying mud hardness and to minimize damage to rice seedlings, the weeding device of the paddy field cultivation and weeding machine is often required to have height adjustment capabilities.

[0003] Currently, the height adjustment method used in paddy field weeding machines is mainly a lever-type lifting mechanism. While this method can lift the weeding components, in actual use, uneven force distribution at both ends of the weeding device due to unilateral force application leads to left-right imbalance. Furthermore, the power input shaft and output shaft of the existing paddy field weeding machine are directly connected via couplings, which can easily cause the mechanism to jam when the weeding device is unbalanced, preventing power transmission to the weeding components. Additionally, the working space of the existing paddy field weeding machine is often across multiple rows of rice seedlings, and the level of the mud layer in the paddy field varies within this range, which can also easily lead to imbalance and jamming of the weeding device. Therefore, there is an urgent need for a device in paddy field weeding machines that can balance the force on both ends of the weeding device when adjusting the height of the weeding components, and can still transmit power even when the device is unbalanced. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and to propose a height-adjustable and adaptive swing transmission device and a method for adjusting the weeding component.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The present invention relates to a height adjustment and adaptive swing transmission device, comprising a main beam, a height adjustment mechanism and an adaptive swing transmission mechanism, wherein the height adjustment mechanism consists of an active adjustment mechanism and a driven adjustment mechanism.

[0007] The active adjustment mechanism includes an adjustment handle, a scale plate, a main adjustment frame, a lifting rotating plate, a lifting connecting plate, a fixing component, an active rotating rod, a lifting connecting rod, a driven rotating rod, and a rotating shaft. The main adjusting frame is fixed to one end of the main beam, and the scale plate is fixed to the main adjusting frame. One end of the adjusting handle passes through a longitudinal slot on the scale plate, and the other end is hinged to one end of the active rotating rod via a hinge shaft. A torsion spring is sleeved on the hinge shaft, and both ends of the torsion spring are fixed to the adjusting handle and the active rotating rod. The middle part of the active rotating rod forms a rotating pair with the main adjusting frame, and the other end is hinged to one end of the lifting connecting rod. The other end of the lifting connecting rod is hinged to one end of the driven rotating rod, and the other end of the driven rotating rod is fixed to the rotating shaft. One end of the rotating shaft forms a rotating pair with the main adjusting frame and is fixed to one end of the lifting rotating plate. One end of the lifting connecting plate forms a vertical sliding pair with the main adjusting frame, and a waist-shaped groove is provided in the middle. The shaft pin fixed to the other end of the lifting rotating plate extends into the waist-shaped groove, forming a groove-pin pair with the waist-shaped groove. The fixing member is fixed to the other end of the lifting connecting plate. The central axis of the hinge shaft is perpendicular to the rotation center axis of the middle part of the active rotating rod; multiple transverse slots perpendicular to the longitudinal slot are opened at the position of the longitudinal slot on the scale plate, and in the initial state, the adjustment handle is embedded in one of the transverse slots.

[0008] The driven adjustment mechanism includes a driven adjustment frame, a second lifting rotating plate, a second lifting connecting plate, and a second fixing member; the driven adjustment frame is fixed to the other end of the main beam; the other end of the rotating shaft forms a rotating pair with the driven adjustment frame and is fixed to one end of the second lifting rotating plate; one end of the second lifting connecting plate forms a vertical sliding pair with the driven adjustment frame, and a waist-shaped groove is provided in the middle, and a shaft pin fixed to the other end of the second lifting rotating plate extends into the waist-shaped groove, forming a groove-pin pair with the waist-shaped groove; the second fixing member is fixed to the other end of the second lifting connecting plate.

[0009] The adaptive swing transmission mechanism is located in the middle of the main beam and includes an input transmission box, a rotating fixed bracket, an output transmission box, an input bevel gear, a first steering bevel gear, an intermediate shaft, a second steering bevel gear, and an output bevel gear. The output transmission box is fixed to the main beam on both sides via a left-side bracket and a right-side bracket. The output bevel gear is located inside the output transmission box and forms a rotating pair with it. A circular hole with a keyway is provided in the center of the output bevel gear. The rotating fixed bracket is located in front of the output transmission box and forms a rotating pair with it. The input transmission box is located behind the output transmission box, and both the input and output transmission boxes form rotating pairs with the two ends of the horizontally positioned intermediate shaft. The input bevel gear is located inside the input transmission box and forms a rotating pair with it. One end of the intermediate shaft located inside the input transmission box... A first steering bevel gear is fixed, and a second steering bevel gear is fixed at one end inside the output transmission box. The first steering bevel gear meshes with the input bevel gear, and the second steering bevel gear meshes with the input bevel gear. The rotation center axis of the rotating fixed bracket is collinear with the center axis of the intermediate shaft. The upper end of the input transmission box has a hole coaxial with the input bevel gear, and the lower end of the output transmission box has a hole coaxial with the circular hole. The line connecting the two rotation centers of the driving rod relative to the main adjusting frame and the lifting connecting rod is parallel to and equal in length to the line connecting the hinge center of the driven rod relative to the lifting connecting rod and the rotation center of the rotating shaft.

[0010] Preferably, the active rotating rod forms a rotating pair with the main regulating mechanism via an adjusting rotating shaft.

[0011] Preferably, the rotating shaft is supported on the main adjusting frame by a bearing housing.

[0012] Preferably, the end of the driven rotating rod away from the rotating shaft is connected to the main adjusting frame via a buffer spring.

[0013] Preferably, the rotating shaft is fixed on the hoist frame by bearing housing 2.

[0014] Preferably, the input transmission box includes an input transmission box body, a connecting end cover, and an input transmission box cover. The upper end of the input transmission box body and the side near the output transmission box are both open, and the connecting end cover is fixed to the opening at the upper end of the input transmission box body. A bearing is installed in a hole one opened on the connecting end cover. The input transmission box cover is fixed to the opening on the side of the input transmission box body near the output transmission box. The intermediate shaft is supported on the input transmission box cover by a bearing two.

[0015] Preferably, the output transmission box includes an output transmission box body and an output transmission box cover. The lower end of the output transmission box body is open, and the output transmission box cover is fixed to the lower end of the output transmission box body opening. A second hole is provided on the output transmission box cover. An output bevel gear connector is fixed on the output transmission box body, and the output bevel gear and the output bevel gear connector form a rotating pair. The end of the intermediate shaft away from the input transmission box is supported on the output transmission box body by a bearing.

[0016] The method for adjusting the weeding component using the height adjustment and adaptive swing transmission device of the present invention is as follows:

[0017] The main beam is horizontally fixed to the weeding frame of the weeding device in the paddy field weeding machine. The two connecting rods in the weeding device are removed and fixed to the fixing parts one and two respectively. The power output shaft of the power output device in the paddy field weeding machine is passed through hole one and fixed to the input bevel gear. The power input shaft of the power input device in the weeding device is passed through hole two and connected to the keyway on the output bevel gear through the key on the power input shaft. The input transmission box and the end of the rotating fixed bracket away from the output transmission box are fixed to the main frame of the paddy field weeding machine.

[0018] The structure of the paddy field weeding machine is as follows: The paddy field weeding machine includes a main frame, a moving mechanism, a power output device, and a weeding device. The moving mechanism drives the main frame to move. The power output device is located on the main frame, and its power output shaft is driven by its own power source. The weeding device includes a weeding frame, a power input device, a transmission shaft, and weeding components. The middle part of the weeding frame is rotatably connected to the main frame, and both ends are connected to the main frame through tension springs. Two symmetrically arranged connecting rods are fixed on the weeding frame. Each of the two connecting rods is equipped with multiple weeding components arranged at axial intervals. The power input device is located between the two connecting rods, and its housing is fixed to the two connecting rods. There are two transmission shafts arranged parallel to the connecting rods. Each transmission shaft and the housing of each weeding component on a connecting rod form a rotating pair and are connected to one power output end of the power input device. The power input end of each weeding component is connected to the corresponding transmission shaft through a bevel gear pair.

[0019] Before the weeding machine moves forward in the paddy field, the height of each weeding component in the weeding device is adjusted. The process is as follows: Hold the adjustment handle and rotate it until it disengages from the transverse groove; then rotate the adjustment handle upwards or downwards. The adjustment handle, through the driving rod and lifting connecting rod, drives the driven rod to rotate downwards or upwards, which in turn drives the rotating shaft to rotate. This, in turn, drives the lifting connecting plate one to move upwards or downwards, causing the lifting connecting plate one to move the corresponding connecting rod upwards or downwards through the fixing part one; at the same time, the rotating shaft drives the lifting rotating plate two to rotate upwards or downwards, which in turn drives the lifting connecting plate two to move upwards or downwards, thus... This causes the lifting connecting plate two to drive another connecting rod to rise or fall synchronously via the fixing part two, thereby driving the weeding components on each connecting rod to rise or fall synchronously, adjusting the height of each weeding component; after adjustment, rotate the adjusting handle until it is embedded in the corresponding other transverse groove, and release the adjusting handle. The adjusting handle returns to its original state under the restoring force of the torsion spring; when the adjusting handle is in the transverse groove at the lowest position, each weeding component is in the highest position, and when the adjusting handle is in the transverse groove at the highest position, each weeding component is in the lowest position; when each weeding component rises or falls, the power input device rises or falls synchronously.

[0020] During the weeding process of the paddy field cultivator, when the weeding components at both ends of the weeding device encounter a difference in mud layer height, the two ends of the weeding device become unbalanced and tilt, causing the main beam to tilt as well. This, in turn, causes the output transmission box and output bevel gear to rotate around the intermediate shaft. At this time, the tension spring at the lower end of the weeding device is stretched, while the tension spring at the higher end is compressed. The power source of the power output device drives the power output shaft to rotate the input bevel gear, which in turn drives the intermediate shaft and the second steering bevel gear to rotate through the first steering bevel gear. The second steering bevel gear meshes with the output bevel gear. When the weeding device tilts and causes the output bevel gear to rotate around the intermediate shaft, it forms a differential transmission with the rotation of the output bevel gear driven by the second steering bevel gear. This allows the power of the adaptive swing transmission mechanism to continue to be transmitted, and the weeding device remains in working condition even when tilted, until the height of the mud layer encountered by the weeding components at both ends of the weeding device is equal. Under the restoring force of the two tension springs, the weeding device drives the main beam to return to a horizontal state, and the output transmission box and output bevel gear return to their state before rotating around the intermediate shaft.

[0021] Preferably, when the height change value of the weeding component is Δy2, the calculation process for the height change value Δy1 of the end of the adjusting handle furthest from the active rotating rod is as follows:

[0022] Let line segment AB be the line connecting the end of the adjusting handle furthest from the driving rod to the rotation center of the driving rod relative to the main adjusting frame; line segment BC be the line connecting the rotation center of the driving rod relative to the main adjusting frame to the hinge center of the driving rod and the lifting connecting rod; line segment CD be the line connecting the hinge centers of the two ends of the lifting connecting rod; line segment ED be the line connecting the hinge center of the driven rod and the lifting connecting rod to the rotation center of the rotating shaft; line segment EF be the line connecting the rotation center of the rotating shaft to the center of the first shaft pin; and line segment GH represent the first lifting connecting plate and... The assembly consisting of the fixing component is used to establish a Cartesian coordinate system with the x-axis parallel to line segment EF. The angle between line segment AB and the x-axis is θ1, the angle between line segment BC and the x-axis is θ2, and the angle between line segment ED and line segment EF is θ3. Line segments BC and ED are parallel and of equal length. The angle between line segments AB and BC, and θ3, remain constant. When the height change of the weeding device is Δy2, the height change of both the lifting connecting plate and the fixing component is Δy2. Let the angle of rotation of line segment EF at this time be θ4. Then:

[0023]

[0024] In the formula, L is the length of line segment EF;

[0025] When line segment EF rotates upward by θ4, it causes line segment ED to rotate upward by the same angle, which in turn causes line segment BC to rotate upward by the same angle via line segment CD, thus causing line segment AB to rotate downward by the same angle. When line segment EF rotates downward by θ4, it causes line segment ED to rotate downward by the same angle, which in turn causes line segment BC to rotate downward by the same angle via line segment CD, thus causing line segment AB to rotate upward by the same angle. Therefore, the angle Δθ of rotation of line segment AB is:

[0026] Δθ=-θ4

[0027] Then, the height change value of point A is obtained, that is, the height change value Δy1 of the end of the adjustment handle away from the active rotating rod is;

[0028] Δy1=l AB [sinθ1-sin(θ1-Δθ)]

[0029] In the formula, l AB Let AB be the length of line segment AB;

[0030] In summary:

[0031]

[0032] In this context, if weeding component rises by Δy2 (i.e., line segment ED rotates upwards), and Δy1 is found to be negative, then it means that weeding component rises by |Δy2|, line segment AB rotates downwards, and the end of the adjusting handle furthest from the driving lever descends by |Δy1|. Conversely, if weeding component descends by Δy2 (i.e., line segment ED rotates downwards), and Δy1 is found to be positive, then it means that weeding component descends by |Δy2|, line segment AB rotates upwards, and the end of the adjusting handle furthest from the driving lever rises by |Δy1|.

[0033] The beneficial effects of the present invention are as follows:

[0034] 1. This invention drives the active rotating rod, lifting connecting rod, and driven rotating rod by turning the adjustment handle of the active adjustment mechanism, which in turn drives the rotating shaft to rotate. The rotating shaft drives the lifting connecting plate and the fixing component to rise or fall through the first lifting plate. At the same time, the rotating shaft drives the lifting connecting plate and the fixing component to rise or fall through the second lifting plate of the driven adjustment mechanism. Thus, the two connecting rods in the weeding device rise or fall simultaneously through the first and second fixing components, which in turn drive the weeding components on the two connecting rods to rise or fall simultaneously. This achieves height adjustment of each weeding component while avoiding the mechanism jamming caused by unilateral force, ensuring continuous power input when adjusting the height of the weeding components. Furthermore, when the weeding device tilts due to different height mud layers encountered by the weeding components at both ends, this invention achieves continuous power input of the weeding device under unbalanced conditions through differential transmission between the second steering bevel gear and the output bevel gear, thus enabling the weeding device to adapt to working conditions where there is a height difference between the left and right mud layers in the working area.

[0035] 2. In this invention, both the active adjustment mechanism and the driven adjustment mechanism are linkage mechanisms, and they are designed around the main beam, which is suitable for the requirements of actual use. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0037] Figure 2 This is a schematic diagram of the active adjustment mechanism in the present invention. Figure 1 ;

[0038] Figure 3 This is a schematic diagram of the active adjustment mechanism in the present invention. Figure 2 ;

[0039] Figure 4 This is a three-dimensional structural view of the active adjustment mechanism in this invention;

[0040] Figure 5 This is a simplified structural diagram of the active adjustment mechanism in this invention before the weeding component rises;

[0041] Figure 6 This is a simplified structural diagram of the active adjustment mechanism in this invention after the weeding component rises;

[0042] Figure 7 This is a schematic diagram of the active adjustment mechanism in this invention when the weeding component is in its highest position;

[0043] Figure 8 This is a schematic diagram of the active adjustment mechanism in this invention when the weeding component is in its lowest position;

[0044] Figure 9 This is a schematic diagram of the driven adjustment mechanism in the present invention. Figure 1 ;

[0045] Figure 10 This is a schematic diagram of the driven adjustment mechanism in the present invention. Figure 2 ;

[0046] Figure 11 This is a schematic diagram of the adaptive swing transmission mechanism in this invention;

[0047] Figure 12 This is a cross-sectional view of the adaptive swing transmission mechanism in this invention;

[0048] Figure 13 This is a schematic diagram of the structure of the present invention located on the main frame of the paddy field tillage and weeding machine;

[0049] Figure 14 This is a schematic diagram of the structure of the weeding device in the paddy field tillage and weeding machine of the present invention when it is in an inclined state. Detailed Implementation

[0050] The present invention will now be further described with reference to the accompanying drawings.

[0051] like Figure 1 As shown, the height adjustment and adaptive swing transmission device of the present invention includes a main beam 1, a height adjustment mechanism and an adaptive swing transmission mechanism 4, and the height adjustment mechanism is composed of an active adjustment mechanism 2 and a driven adjustment mechanism 3.

[0052] like Figure 2 , Figure 3 and Figure 4As shown, the active adjustment mechanism 2 includes an adjustment handle 21, a scale plate 22, a main adjustment frame 23, a lifting rotating plate 25, a lifting connecting plate 26, a fixing component 27, an active rotating rod 28, a lifting connecting rod 29, a driven rotating rod 210, and a rotating shaft 213. The main adjustment frame 23 is fixed to one end of the main beam 1, and the scale plate 22 is fixed to the main adjustment frame 23. One end of the adjustment handle 21 passes through a longitudinal groove on the scale plate 22, and the other end is hinged to one end of the active rotating rod 28 via a hinge shaft. A torsion spring is fitted on the hinge shaft, and both ends of the torsion spring are fixed to the adjustment handle 21 and the active rotating rod 28. The middle part of the active rotating rod 28 forms a rotating pair with the main adjustment frame 23, and the other end is hinged to one end of the lifting connecting rod 29. The other end of the lifting connecting rod 29 is hinged to one end of the driven rotating rod 210, and the driven rotating rod 210... The other end of the rotating rod 210 is fixed to the rotating shaft 213; one end of the rotating shaft 213 forms a rotating pair with the main adjusting frame 23 and is fixed to one end of the lifting rotating plate 25; one end of the lifting connecting plate 26 forms a vertical sliding pair with the main adjusting frame 23, and a waist-shaped groove is provided in the middle; the shaft pin fixed at the other end of the lifting rotating plate 25 extends into the waist-shaped groove and forms a groove-pin pair with the waist-shaped groove; the fixing part 27 is fixed to the other end of the lifting connecting plate 26 and is used to fix it to the connecting rod of the weeding device in the paddy field weeding machine. Among them, the central axis of the hinge shaft is perpendicular to the rotation center axis of the middle part of the active rotating rod 28; multiple transverse grooves perpendicular to the longitudinal groove are provided on the scale plate 22 at the position of the longitudinal groove for multi-level adjustment. In the initial state, the adjusting handle 21 is embedded in one of the transverse grooves.

[0053] like Figure 9 and Figure 10 As shown, the driven adjustment mechanism 3 includes a driven adjustment frame 31, a second lifting rotating plate 32, a second lifting connecting plate 33, and a second fixing member 34. The driven adjustment frame 31 is fixed to the other end of the main beam 1. The other end of the rotating shaft 213 forms a rotating pair with the driven adjustment frame 31 and is fixed to one end of the second lifting rotating plate 32. One end of the second lifting connecting plate 33 forms a vertical sliding pair with the driven adjustment frame 31, and a waist-shaped groove is provided in the middle. The second shaft pin fixed to the other end of the second lifting rotating plate 32 extends into the waist-shaped groove and forms a groove-pin pair with the waist-shaped groove. The second fixing member 34 is fixed to the other end of the second lifting connecting plate 33 and is used to fix it to the connecting rod of the weeding device in the paddy field weeding machine.

[0054] like Figure 11 and Figure 12As shown, the adaptive swing transmission mechanism 4 is located in the middle of the main beam and includes an input transmission box 42, a rotating fixed bracket 46, an output transmission box 48, an input bevel gear 410, a first steering bevel gear 411, an intermediate shaft 412, a second steering bevel gear 413, and an output bevel gear 414. The output transmission box 48 is fixed to the main beam 1 on both sides by the left bracket 41 and the right bracket 45; the output bevel gear 414 is located inside the output transmission box 48 and forms a rotating pair with the output transmission box 48, and a round hole is opened in the middle of the output bevel gear, and a keyway is opened in the round hole of the output bevel gear; the rotating fixed bracket 46 is located in front of the output transmission box 48 and forms a rotating pair with the output transmission box 48; the input transmission box 42 is located behind the output transmission box 48, and the input transmission box 42 and the output transmission box 48 form rotating pairs with the two ends of the horizontally arranged intermediate shaft 412 respectively; the input bevel gear 410 is located inside the input transmission box 42 and forms a rotating pair with the input transmission box 42; a first steering bevel gear 411 is fixed at one end of the intermediate shaft 412 inside the input transmission box 42, and a second steering bevel gear 413 is fixed at the other end of the intermediate shaft 412 inside the output transmission box 48. Furthermore, the first steering bevel gear 411 meshes with the input bevel gear 410, and the second steering bevel gear 413 meshes with the input bevel gear 410; wherein, the rotation center axis of the rotating fixed bracket 46 is collinear with the center axis of the intermediate shaft 412, the upper end of the input transmission box 42 has a hole 1 coaxially arranged with the input bevel gear 410, through which the power output shaft of the power output device in the paddy field weeding machine passes and is fixed to the input bevel gear 410, and the lower end of the output transmission box 48 has a hole 2 coaxially arranged with the round hole, through which the power input shaft of the power input device in the weeding device of the paddy field weeding machine passes and is connected to the output bevel gear 414; the line connecting the two rotation centers of the active rotating rod relative to the main adjusting frame and the lifting connecting rod is parallel to and equal in length to the line connecting the hinge center of the driven rotating rod relative to the lifting connecting rod and the rotation center of the rotating shaft.

[0055] In a preferred embodiment, the active rotating rod 28 forms a rotating pair with the main adjusting frame 23 via the adjusting rotating shaft 211.

[0056] In a preferred embodiment, the rotating shaft 213 is supported on the main adjusting frame 23 by a bearing housing 212.

[0057] In a preferred embodiment, the end of the driven rotating rod 210 away from the rotating shaft 213 is connected to the main adjusting frame 23 via a buffer spring 24.

[0058] In a preferred embodiment, the rotating shaft 213 is fixed on the hoist frame 31 by bearing housing 35.

[0059] In a preferred embodiment, the input transmission box 42 includes an input transmission box body, a connecting end cover 43, and an input transmission box cover 44. The upper end of the input transmission box body and the side near the output transmission box 48 are both open, and the connecting end cover 43 is fixed to the opening at the upper end of the input transmission box body. A bearing is installed in a hole on the connecting end cover 43. The bearing is used to support the power output shaft of the power output device in the paddy field weeding machine. The input transmission box cover 44 is fixed to the opening on the side of the input transmission box body near the output transmission box 48. The intermediate shaft 412 is supported on the input transmission box cover 44 by a bearing.

[0060] In a preferred embodiment, the output transmission box 48 includes an output transmission box body and an output transmission box cover 49. The lower end of the output transmission box body is open, and the output transmission box cover 49 is fixed to the lower end of the output transmission box body. The output transmission box cover 49 has a second hole. An output bevel gear connector 47 is fixed on the output transmission box body. The output bevel gear 414 and the output bevel gear connector 47 form a rotating pair. The end of the intermediate shaft 412 away from the input transmission box 42 is supported on the output transmission box body by a bearing.

[0061] The aforementioned paddy field weeding machine includes a main frame, a moving mechanism, a power output device, and a weeding device. The moving mechanism drives the main frame to move. The power output device is located on the main frame. The weeding device includes a weeding frame, a power input device, a drive shaft, and weeding components. The middle of the weeding frame is rotatably connected to the main frame, and both ends are connected to the main frame via tension springs. Two symmetrically arranged connecting rods are fixed on the weeding frame. Each of the two connecting rods is equipped with multiple weeding components arranged axially (the housings of the weeding components are fixed to the connecting rods). The power input device is located between the two connecting rods, and its housing is fixed to the two connecting rods. There are two drive shafts arranged parallel to the connecting rods. Each drive shaft and the housing of each weeding component on one connecting rod form a rotating pair and are connected to one power output end of the power input device. The power input end of each weeding component is connected to the corresponding drive shaft via a bevel gear pair.

[0062] The method for adjusting the weeding component using the height adjustment and adaptive swing transmission device of the present invention is as follows:

[0063] like Figure 13As shown, the main beam 1 is horizontally fixed to the weeding frame of the weeding device in the paddy field weeding machine. The two connecting rods in the weeding device are disassembled and fixed to the fixing parts 1 and 2 respectively, so that the part of the weeding device other than the weeding frame is fixed to the fixing parts 1 and 2. The power output shaft of the power output device in the paddy field weeding machine is fixed to the input bevel gear 410 through hole 1. The power input shaft of the power input device in the weeding device is fixed to the keyway on the output bevel gear 414 through hole 2. The input transmission box 42 and the end of the rotating fixed bracket 46 away from the output transmission box 48 are fixed to the main frame of the paddy field weeding machine.

[0064] Before the weeding machine moves forward in the paddy field, the height of each weeding component in the weeding device is adjusted as follows: Hold the adjustment handle 21 and rotate it until it disengages from the transverse groove; then rotate the adjustment handle 21 upwards or downwards. The adjustment handle 21 drives the driven rotating rod 210 to rotate downwards or upwards via the active rotating rod 28 and the lifting connecting rod 29, which in turn drives the rotating shaft 213 to rotate. This, in turn, drives the lifting connecting plate 26 to move upwards or downwards via the lifting rotating plate 25, so that the lifting connecting plate 26 drives the corresponding connecting rod through the fixing part 27. The rotating shaft 213 rotates, causing the lifting plate 32 to rotate upwards or downwards, which in turn causes the lifting connecting plate 33 to move upwards or downwards. This allows the lifting connecting plate 33 to drive another connecting rod to rise or fall synchronously through the fixing member 34, thereby causing the weeding components on each connecting rod to rise or fall synchronously, thus achieving the adjustment of the height of each weeding component. After the adjustment is completed, the adjusting handle 21 is rotated to be embedded in the corresponding other transverse groove, and the adjusting handle 21 is released. The adjusting handle 21 returns to its original state under the restoring force of the torsion spring.

[0065] Among them, such as Figure 7 As shown, when the adjusting handle 21 is in the lowest position in the horizontal groove, all weeding components are in the highest position, such as... Figure 8 As shown, when the adjusting handle 21 is in the horizontal groove at the highest position, each weeding component is in the lowest position; when each weeding component rises or falls, the power input device rises or falls synchronously.

[0066] When the height change of the weeding component is Δy2, the calculation process for the height change Δy1 of the end of the adjustment handle furthest from the drive lever is as follows:

[0067] like Figure 5 and Figure 6As shown in the simplified structural diagram of the active adjustment mechanism, line segment AB is the line connecting the end of the adjustment handle furthest from the active rotating rod to the rotation center of the active rotating rod relative to the main adjustment frame; line segment BC is the line connecting the rotation center of the active rotating rod relative to the main adjustment frame to the hinge center of the active rotating rod and the lifting link; line segment CD is the line connecting the hinge centers of the two ends of the lifting link; line segment ED is the line connecting the hinge center of the driven rotating rod and the lifting link to the rotation center of the rotating shaft; line segment EF is the line connecting the rotation center of the rotating shaft to the center of the shaft pin; and line segment GH represents... The assembly consisting of the lifting connecting plate and the fixing component is defined in a Cartesian coordinate system with the x-axis parallel to line segment EF. The angle between line segment AB and the x-axis is θ1, the angle between line segment BC and the x-axis is θ2, and the angle between line segment ED and line segment EF is θ3. Line segments BC and ED are parallel and of equal length. The angle between line segments AB and BC, as well as θ3, remain constant. When the height of the weeding component changes by Δy2, the height changes of both the lifting connecting plate and the fixing component are also Δy2. Let the angle of rotation of line segment EF at this time be θ4.

[0068]

[0069] In the formula, L is the length of line segment EF;

[0070] When line segment EF rotates upward by θ4, it causes line segment ED to rotate upward by the same angle, which in turn causes line segment BC to rotate upward by the same angle via line segment CD, thus causing line segment AB to rotate downward by the same angle. When line segment EF rotates downward by θ4, it causes line segment ED to rotate downward by the same angle, which in turn causes line segment BC to rotate downward by the same angle via line segment CD, thus causing line segment AB to rotate upward by the same angle. Therefore, the angle Δθ of rotation of line segment AB is:

[0071] Δθ=-θ4

[0072] Then, the height change value of point A is obtained, that is, the height change value Δy1 of the end of the adjustment handle away from the active rotating rod is;

[0073] Δy1=l AB [sinθ1-sin(θ1-Δθ)]

[0074] In the formula, l AB Let AB be the length of line segment AB;

[0075] In summary:

[0076]

[0077] In this context, if the weeding component rises (i.e., line segment ED rotates upwards), the value of Δy2 is positive, and the value of Δy1 is negative, then it means the weeding component rises by |Δy2|, line segment AB rotates downwards, and the end of the adjusting handle furthest from the driving lever descends by |Δy1|. Conversely, if the weeding component descends (i.e., line segment ED rotates downwards), the value of Δy2 is negative, and the value of Δy1 is positive, then it means the weeding component descends by |Δy2|, line segment AB rotates upwards, and the end of the adjusting handle furthest from the driving lever rises by |Δy1|.

[0078] During the weeding process of the paddy field cultivator, when the weeding components at both ends of the weeding device encounter a significant difference in mud layer height, the two ends of the weeding device become unbalanced and tilt, which in turn causes the main beam 1 to tilt as well. Figure 14 As shown, this causes the output transmission box 48 and the output bevel gear 414 to rotate around the intermediate shaft 412. At this time, the tension spring at the lower end of the weeding device is stretched, and the tension spring at the higher end is compressed. The power source of the power output device drives the power output shaft to rotate the input bevel gear 410, which in turn drives the intermediate shaft 412 and the second steering bevel gear 413 to rotate through the first steering bevel gear 411. The second steering bevel gear 413 meshes with the output bevel gear 414, and the weeding device tilts, causing the output bevel gear 414 to rotate around the intermediate shaft 412. When rotating, the rotation of the output bevel gear 414 is driven by the steering bevel gear 413 to form a differential transmission, so that the power of the adaptive swing transmission mechanism 4 can still be continuously transmitted, thus enabling the weeding device to still transmit power when tilted, avoiding jamming, until the height of the mud layer encountered by the weeding components at both ends of the weeding device is equal. Under the restoring force of the two tension springs, the weeding device drives the main beam to return to the horizontal state, and the output transmission box 48 and the output bevel gear 414 return to the state before rotating around the intermediate shaft 412.

Claims

1. A height-adjustable and adaptive swing transmission device, comprising a main beam and a height adjustment mechanism, characterized in that: It also includes an adaptive swing transmission mechanism, and the height adjustment mechanism consists of an active adjustment mechanism and a driven adjustment mechanism; the active adjustment mechanism includes an adjustment handle, a scale plate, a main adjustment frame, a lifting rotating plate, a lifting connecting plate, a fixing component, an active rotating rod, a lifting connecting rod, a driven rotating rod, and a rotating shaft; the main adjustment frame is fixed to one end of the main beam, and the scale plate is fixed to the main adjustment frame; one end of the adjustment handle passes through a longitudinal groove on the scale plate, and the other end is hinged to one end of the active rotating rod via a hinge shaft, and a torsion spring is sleeved on the hinge shaft, with both ends of the torsion spring fixed to the adjustment handle and the active rotating rod; the middle part of the active rotating rod forms a rotating pair with the main adjustment frame, and the other end is hinged to one end of the lifting connecting rod; The other end of the lifting connecting rod is hinged to one end of the driven rotating rod, and the other end of the driven rotating rod is fixed to the rotating shaft; one end of the rotating shaft forms a rotating pair with the main adjusting mechanism and is fixed to one end of the lifting rotating plate; one end of the lifting connecting plate forms a vertical sliding pair with the main adjusting mechanism, and a waist-shaped groove is provided in the middle; a shaft pin fixed at the other end of the lifting rotating plate extends into the waist-shaped groove and forms a groove-pin pair with the waist-shaped groove; the fixing member is fixed to the other end of the lifting connecting plate; wherein, the central axis of the hinge shaft is perpendicular to the rotation center axis of the middle of the driving rotating rod; multiple transverse grooves perpendicular to the longitudinal groove are provided on the scale plate at the position of the longitudinal groove, and in the initial state, the adjusting handle is embedded in one of the transverse grooves. The driven adjustment mechanism includes a driven adjustment frame, a second lifting rotating plate, a second lifting connecting plate, and a second fixing component; the driven adjustment frame is fixed to the other end of the main beam; the other end of the rotating shaft forms a rotating pair with the driven adjustment frame and is fixed to one end of the second lifting rotating plate; one end of the second lifting connecting plate forms a vertical sliding pair with the driven adjustment frame, and a waist-shaped groove is provided in the middle, and a pin fixed to the other end of the second lifting rotating plate extends into the waist-shaped groove, forming a groove-pin pair with the waist-shaped groove; the second fixing component is fixed to the other end of the second lifting connecting plate. The adaptive swing transmission mechanism is located in the middle of the main beam and includes an input transmission box, a rotating fixed bracket, an output transmission box, an input bevel gear, a first steering bevel gear, an intermediate shaft, a second steering bevel gear, and an output bevel gear. The output transmission box is fixed to the main beam on both sides via a left-side bracket and a right-side bracket. The output bevel gear is located inside the output transmission box and forms a rotating pair with it. A circular hole is formed in the middle of the output bevel gear, and a keyway is formed in the circular hole. The rotating fixed bracket is located in front of the output transmission box and forms a rotating pair with it. The input transmission box is located behind the output transmission box, and both the input and output transmission boxes form rotating pairs with the two ends of the horizontally positioned intermediate shaft. The input bevel gear is located in the middle of the main beam. The input transmission box is connected to the intermediate shaft, forming a rotating pair. A first steering bevel gear is fixed at one end of the intermediate shaft within the input transmission box, and a second steering bevel gear is fixed at the other end within the output transmission box. The first steering bevel gear meshes with the input bevel gear, and the second steering bevel gear meshes with the input bevel gear. The rotation center axis of the rotating fixed bracket is collinear with the center axis of the intermediate shaft. The upper end of the input transmission box has a hole coaxial with the input bevel gear, and the lower end of the output transmission box has a hole coaxial with the circular hole. The line connecting the two rotation centers of the driving rod relative to the main adjusting frame and the lifting connecting rod is parallel to and equal in length to the line connecting the hinge center of the driven rod relative to the lifting connecting rod and the rotation center of the rotating shaft.

2. The height adjustment and adaptive swing transmission device according to claim 1, characterized in that: The active rotating rod forms a rotating pair with the main regulating mechanism through the adjusting rotating shaft.

3. The height adjustment and adaptive swing transmission device according to claim 1, characterized in that: The rotating shaft is supported on the main adjusting frame by a bearing housing.

4. The height adjustment and adaptive swing transmission device according to claim 1, characterized in that: The end of the driven rotating rod away from the rotating shaft is connected to the main adjusting frame via a buffer spring.

5. The height adjustment and adaptive swing transmission device according to claim 1, characterized in that: The rotating shaft is fixed on the hoist frame by bearing housing 2.

6. The height adjustment and adaptive swing transmission device according to claim 1, characterized in that: The input transmission box includes an input transmission box body, a connecting end cover, and an input transmission box cover. The upper end of the input transmission box body and the side near the output transmission box are both open, and the connecting end cover is fixed to the opening at the upper end of the input transmission box body. A bearing is installed in a hole one on the connecting end cover. The input transmission box cover is fixed to the opening on the side of the input transmission box body near the output transmission box. The intermediate shaft is supported on the input transmission box cover by a bearing two.

7. The height adjustment and adaptive swing transmission device according to claim 1, characterized in that: The output transmission box includes an output transmission box body and an output transmission box cover. The lower end of the output transmission box body is open, and the output transmission box cover is fixed to the lower end of the output transmission box body. A second hole is provided on the output transmission box cover. An output bevel gear connector is fixed on the output transmission box body, and the output bevel gear and the output bevel gear connector form a rotating pair. The end of the intermediate shaft away from the input transmission box is supported on the output transmission box body by a bearing.

8. The method for adjusting the weeding component using the height adjustment and adaptive oscillating transmission device according to any one of claims 1 to 7, characterized in that: Specifically as follows: The main beam is horizontally fixed to the weeding frame of the weeding device in the paddy field weeding machine. The two connecting rods in the weeding device are removed and fixed to the fixing parts one and two respectively. The power output shaft of the power output device in the paddy field weeding machine is fixed to the input bevel gear through hole one. The power input shaft of the power input device in the weeding device is passed through hole two and connected to the keyway on the output bevel gear through the key on the power input shaft. The input transmission box and the end of the rotating fixed bracket away from the output transmission box are fixed to the main frame of the paddy field weeding machine. The structure of the paddy field weeding machine is as follows: The paddy field weeding machine includes a main frame, a moving mechanism, a power output device, and a weeding device. The moving mechanism drives the main frame to move. The power output device is located on the main frame, and its power output shaft is driven by its own power source. The weeding device includes a weeding frame, a power input device, a transmission shaft, and weeding components. The middle part of the weeding frame is rotatably connected to the main frame, and both ends are connected to the main frame through tension springs. Two symmetrically arranged connecting rods are fixed on the weeding frame. Each of the two connecting rods is provided with multiple weeding components arranged at axial intervals. The power input device is located between the two connecting rods, and its housing is fixed to the two connecting rods. The transmission shaft has two parallel ones arranged with the connecting rods. Each transmission shaft and the housing of each weeding component on a connecting rod form a rotating pair and are connected to one power output end of the power input device. The power input end of each weeding component is connected to the corresponding transmission shaft through a bevel gear pair. Before the weeding machine moves forward in the paddy field, the height of each weeding component in the weeding device is adjusted. The process is as follows: Hold the adjustment handle and rotate it until it disengages from the transverse groove; then rotate the adjustment handle upwards or downwards. The adjustment handle, through the driving rod and lifting connecting rod, drives the driven rod to rotate downwards or upwards, which in turn drives the rotating shaft to rotate. This, in turn, drives the lifting connecting plate one to move upwards or downwards, causing the lifting connecting plate one to move the corresponding connecting rod upwards or downwards through the fixing part one; at the same time, the rotating shaft drives the lifting rotating plate two to rotate upwards or downwards, which in turn drives the lifting connecting plate two to move upwards or downwards, thus... This causes the lifting connecting plate two to drive another connecting rod to rise or fall synchronously via the fixing part two, thereby driving the weeding components on each connecting rod to rise or fall synchronously, adjusting the height of each weeding component; after adjustment, rotate the adjusting handle until it is embedded in the corresponding transverse groove, and release the adjusting handle. The adjusting handle returns to its original position under the restoring force of the torsion spring; when the adjusting handle is in the transverse groove at the lowest position, each weeding component is in the highest position, and when the adjusting handle is in the transverse groove at the highest position, each weeding component is in the lowest position; when each weeding component rises or falls, the power input device rises or falls synchronously; During the weeding process of the paddy field cultivator, when the weeding components at both ends of the weeding device encounter a difference in mud layer height, the two ends of the weeding device become unbalanced and tilt, causing the main beam to tilt as well. This, in turn, causes the output transmission box and output bevel gear to rotate around the intermediate shaft. At this time, the tension spring at the lower end of the weeding device is stretched, while the tension spring at the higher end is compressed. The power source of the power output device drives the power output shaft to rotate the input bevel gear, which in turn drives the intermediate shaft and the second steering bevel gear to rotate through the first steering bevel gear. The second steering bevel gear meshes with the output bevel gear. When the weeding device tilts and causes the output bevel gear to rotate around the intermediate shaft, it forms a differential transmission with the rotation of the output bevel gear driven by the second steering bevel gear. This allows the power of the adaptive swing transmission mechanism to continue to be transmitted, and the weeding device remains in working condition even when tilted, until the height of the mud layer encountered by the weeding components at both ends of the weeding device is equal. Under the restoring force of the two tension springs, the weeding device drives the main beam to return to a horizontal state, and the output transmission box and output bevel gear return to their state before rotating around the intermediate shaft.

9. The method for adjusting the weeding component using the height adjustment and adaptive oscillating transmission device according to claim 8, characterized in that: When the height change of the weeding component is Δy2, the calculation process for the height change Δy1 of the end of the adjustment handle furthest from the active rotating rod is as follows: Let line segment AB be the line connecting the end of the adjusting handle furthest from the driving rod to the rotation center of the driving rod relative to the main adjusting frame; line segment BC be the line connecting the rotation center of the driving rod relative to the main adjusting frame to the hinge center of the driving rod and the lifting link; line segment CD be the line connecting the hinge centers of the two ends of the lifting link; line segment ED be the line connecting the hinge center of the driven rod and the lifting link to the rotation center of the rotating shaft; line segment EF be the line connecting the rotation center of the rotating shaft to the center of the first shaft pin; and line segment GH represent the first lifting connecting plate. The assembly consisting of the first lifting plate and the first fixing component is used to establish a Cartesian coordinate system with the x-axis parallel to line segment EF. The angle between line segment AB and the x-axis is θ1, the angle between line segment BC and the x-axis is θ2, and the angle between line segment ED and line segment EF is θ3. Line segments BC and ED are parallel and of equal length. The angle between line segments AB and BC, and θ3, remain constant. When the height change of the weeding device is Δy2, the height change of both the first lifting plate and the first fixing component is Δy2. Let the angle of rotation of line segment EF at this time be θ4. In the formula, L is the length of line segment EF; When line segment EF rotates upward by θ4, it causes line segment ED to rotate upward by the same angle, which in turn causes line segment BC to rotate upward by the same angle via line segment CD, thus causing line segment AB to rotate downward by the same angle. When line segment EF rotates downward by θ4, it causes line segment ED to rotate downward by the same angle, which in turn causes line segment BC to rotate downward by the same angle via line segment CD, thus causing line segment AB to rotate upward by the same angle. Therefore, the angle Δθ of rotation of line segment AB is: Δθ=-θ4 Then, the height change value of point A is obtained, that is, the height change value Δy1 of the end of the adjustment handle away from the active rotating rod is; Δy1=l AB [sinθ1-sin(θ1-Δθ)] In the formula, l AB Let AB be the length of line segment AB; Then we get: In this context, if the weeding component rises (i.e., line segment ED rotates upwards), the value of Δy2 is positive, and the value of Δy1 is negative, then it means the weeding component rises by |Δy2|, line segment AB rotates downwards, and the end of the adjusting handle furthest from the driving lever descends by |Δy1|. Conversely, if the weeding component descends (i.e., line segment ED rotates downwards), the value of Δy2 is negative, and the value of Δy1 is positive, then it means the weeding component descends by |Δy2|, line segment AB rotates upwards, and the end of the adjusting handle furthest from the driving lever rises by |Δy1|.

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