A 3D cleaning system for a combine harvester and a combine harvester

Abstract

The present application relates to the field of harvesting machines, and particularly relates to a 3D cleaning system for a combine harvester and the combine harvester. The 3D cleaning system for the combine harvester comprises a return disc component, an upper sieve box component arranged below the return disc component, and a driving component. The driving component comprises a first driving arm assembly, a second driving arm assembly, a driving assembly, and a connecting assembly. The connecting assembly is driven to move by the driving assembly, the connecting assembly drives the return disc component to move through the first driving arm assembly, and drives the upper sieve box component to move through the second driving arm assembly. The movement of the return disc component and the upper sieve box component is decoupled through the connecting mode, so that the return disc component and the upper sieve box component can independently move, the movement of the return disc component is not interfered by the upper sieve box component in the transverse vibration process, and the stable operation of the return disc component is ensured, and the return disc component will not abnormally vibrate or deviate from the track due to the transverse vibration of the upper sieve box component.

Description

Technical Field

[0001] This invention relates to the field of harvesters, and more particularly to a 3D cleaning system for combine harvesters and a combine harvester. Background Technology

[0002] As agricultural operations become increasingly large-scale, combine harvesters will also develop towards larger sizes, greater intelligence, and higher adaptability. When operating on slopes, traditional cleaning screens are prone to uneven material distribution and reduced cleaning performance due to tilting. 3D cleaning systems, however, use a transverse vibration device to adjust the transverse amplitude of the upper screen box, helping to distribute materials more evenly on the screen surface. This effectively prevents damp or lightweight materials from accumulating locally or clogging the screen holes, keeping the screen surface clear. However, existing upper screen boxes interfere with the movement of the return disc during transverse vibration, affecting the normal operation of the return disc. Summary of the Invention

[0003] This invention provides a 3D cleaning system for combine harvesters to solve the problem in the prior art where the upper screen box interferes with the movement of the return plate during lateral vibration.

[0004] This invention provides a 3D cleaning system for combine harvesters, comprising: Return disk components; The upper screening box component is located below the return tray component; The driving component includes a first driving arm assembly, a second driving arm assembly, a driving assembly, and a connecting assembly. The first driving arm assembly is rotatably connected to the return plate assembly and the side wall of the frame. The second driving arm assembly is rotatably connected to the upper screen box assembly and the side wall of the frame. The driving assembly is rotatably connected to the side wall of the frame. The connecting assembly is rotatably connected to the side wall of the frame, the first driving arm assembly, the second driving arm assembly, and the driving assembly. The driving assembly drives the connecting assembly to move. The connecting assembly drives the return plate assembly to move via the first driving arm assembly and drives the upper screen box assembly to move via the second driving arm assembly.

[0005] According to the present invention, a 3D cleaning system for a combine harvester is provided, wherein the connecting component includes: The three-pronged arm is provided with a first connecting hole, a second connecting hole, a third connecting hole, and a fourth connecting hole. The third connecting hole is located between the first connecting hole and the second connecting hole, and the fourth connecting hole is located on one side of the center line connecting the first connecting hole and the second connecting hole. The second connecting hole is rotatably connected to the drive assembly, the third connecting hole is rotatably connected to the side wall of the frame, and the fourth connecting hole is rotatably connected to the second drive arm assembly. A drive connection assembly is rotatably connected to the first connection hole and the first drive arm assembly.

[0006] According to the present invention, a 3D cleaning system for a combine harvester includes a first drive arm assembly comprising a return disc drive arm and a return disc front swing arm; a second drive arm assembly comprising an upper screen box front swing arm and an upper screen box drive arm; the length of the upper screen box front swing arm is equal to the length of the line connecting the centers of the third connecting hole and the fourth connecting hole, and the upper screen box front swing arm is parallel to the line connecting the centers of the third connecting hole and the fourth connecting hole; the length of the return disc front swing arm is equal to the length of the line connecting the centers of the first connecting hole and the third connecting hole, and the return disc front swing arm is parallel to the line connecting the centers of the first connecting hole and the third connecting hole.

[0007] According to the present invention, a 3D cleaning system for a combine harvester is provided, wherein the drive connection assembly includes: The first rubber sleeve is inserted into the first connecting hole; The first spacer is inserted inside the first rubber sleeve, and the first end of the first spacer is connected to the first drive arm assembly; The first bolt passes through the inside of the first spacer, and the nut of the first bolt abuts against the first drive arm assembly; A first flat washer is fitted onto the first bolt and is located on the side of the first rubber sleeve opposite to the first drive arm assembly. The nut of the first bolt abuts against the side of the first flat washer opposite to the first spacer.

[0008] According to the 3D cleaning system for a combine harvester provided by the present invention, the drive connection assembly further includes: A washer is fitted onto the first bolt and located between the nut and the first drive arm assembly; A washer is fitted onto the first bolt and located between the nut and the first flat washer.

[0009] According to the present invention, a 3D cleaning system for a combine harvester is provided, wherein the end face of the second end of the first spacer has a first gap with the first flat washer.

[0010] According to the present invention, a 3D cleaning system for a combine harvester is provided, wherein the drive component includes: A pulley, the shaft of which is rotatably connected to the side wall of the frame; A cam is fitted onto the shaft of the pulley; A first push rod, the first end of which is rotatably connected to the cam, and the second end of which is rotatably connected to the second connecting hole.

[0011] According to the present invention, a 3D cleaning system for a combine harvester is provided, wherein the first end of the return disc drive arm is sleeved on the first end of the first spacer. The return tray component is provided with a first fixed shaft seat. The first end of the return tray front swing arm and the second end of the return tray drive arm are both rotatably connected to the first fixed shaft seat. The side wall of the frame is provided with a second fixed shaft seat. The second end of the return tray front swing arm and the second drive arm assembly are both rotatably connected to the second fixed shaft seat.

[0012] According to the present invention, a 3D cleaning system for a combine harvester is provided, wherein the first end of the front swing arm of the upper screen box is rotatably connected to the second fixed shaft seat, and the second end of the front swing arm of the upper screen box is rotatably connected to the upper screen box component. The first end of the upper screen box drive arm is rotatably connected to the front swing arm of the upper screen box, and the second end of the upper screen box drive arm is rotatably connected to the fourth connecting hole.

[0013] The present invention also provides a combine harvester, the combine harvester including the 3D cleaning system for a combine harvester as described in any of the preceding claims.

[0014] The 3D cleaning system for combine harvesters provided by this invention drives the connecting component to move through a drive component. The connecting component drives the return plate component to move through a first drive arm component, and drives the upper screen box component to move through a second drive arm component. This connection method decouples the movement of the return plate component and the upper screen box component, allowing them to move independently. This avoids interference from the upper screen box component's lateral vibration on the movement of the return plate component, ensuring stable operation of the return plate component and preventing abnormal vibration or trajectory deviation due to the lateral vibration of the upper screen box component. This helps to ensure the effective conveying of materials on the return plate component. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is one of the side view structural schematic diagrams of the 3D cleaning system for combine harvesters provided by the present invention.

[0017] Figure 2 This is a structural schematic diagram of the upper screen box component provided by the present invention.

[0018] Figure 3This is the second side view structural schematic diagram of the 3D cleaning system for combine harvesters provided by the present invention.

[0019] Figure 4 This is a schematic diagram of the structure of the driving component provided by the present invention.

[0020] Figure 5 This is a schematic diagram of the structure of the trident provided by the present invention.

[0021] Figure 6 This is a schematic diagram of the pulley structure provided by the present invention.

[0022] Figure 7 This is a cross-sectional structural diagram of the drive connection assembly provided by the present invention.

[0023] Figure 8 This is a cross-sectional structural diagram of the bearing with mounting provided by the present invention.

[0024] Figure 9 This is a cross-sectional structural diagram of the connecting arm assembly provided by the present invention.

[0025] Figure 10 This is one of the three-dimensional structural schematic diagrams of the transverse vibration component provided by the present invention.

[0026] Figure 11 This is the second three-dimensional structural schematic diagram of the transverse vibration component provided by the present invention.

[0027] Figure 12 This is one of the schematic diagrams illustrating the state adjustment principle of the transverse vibration component provided by the present invention.

[0028] Figure 13 This is the second schematic diagram of the state adjustment principle of the transverse vibration component provided by the present invention.

[0029] Figure 14 This is one of the schematic diagrams illustrating the vibration principle of the upper screen box component provided by the present invention.

[0030] Figure 15 This is the second schematic diagram of the vibration principle of the upper screen box component provided by the present invention.

[0031] Figure label: 10. Feeding disc assembly; 20. Upper screen box assembly; 30. Drive assembly; 31. First drive arm assembly; 32. Second drive arm assembly; 33. Drive assembly; 34. Connecting assembly; 40. Lateral vibration assembly; 41. Lateral vibration assembly; 42. Linear drive component; 50. Lower screen box assembly; 310. Return plate drive arm; 311. Return plate front swing arm; 312. First fixed shaft seat; 313. Second fixed shaft seat; 320. Front swing arm of upper screen box; 321. Drive arm of upper screen box; 330. Pulley; 331. Cam; 332. First push rod; 340. Trident arm; 341. First connecting hole; 342. Second connecting hole; 343. Third connecting hole; 344. Fourth connecting hole; 345. Drive connection assembly; 346. First rubber sleeve; 347. First spacer; 348. First bolt; 349. First flat washer; 350. Washer; 351. Washer; 352. First gap; 410. Connecting seat; 411. First support; 412. Second support; 413. Rocker arm; 414. Screen box connecting arm; 415. Second rubber sleeve; 416. Second spacer; 417. Second bolt; 418. First connecting part; 419. Second flat washer; 420. Third flat washer; 421. Second gap; 422. Bearing with seat; 423. Connecting shaft; 424. Spring washer. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0033] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0035] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0037] like Figure 1 and Figure 2 As shown, the 3D cleaning system for a combine harvester includes a return disc assembly 10, an upper screen box assembly 20, and a drive assembly 30. The return disc assembly 10 is used to convey materials. The upper screen box assembly 20 is located below the return disc assembly 10, and is used to move along its own length direction (i.e., under the drive of the drive assembly 30)... Figure 1 The machine vibrates back and forth in the left and right directions, and with the help of the airflow delivered by the cleaning fan, the grains in the threshed material are separated, and other impurities (such as short straw, chaff, etc.) are discharged from the machine.

[0038] The drive component 30 includes a first drive arm assembly 31, a second drive arm assembly 32, a drive assembly 33, and a connecting assembly 34. The first drive arm assembly 31 is rotatably connected to the return plate assembly 10 and the side wall of the frame; the second drive arm assembly 32 is rotatably connected to the upper screen box assembly 20 and the side wall of the frame; the drive assembly 33 is rotatably connected to the side wall of the frame; the connecting assembly 34 is rotatably connected to the side wall of the frame, the first drive arm assembly 31, the second drive arm assembly 32, and the drive assembly 33. The drive assembly 33 is used to drive the connecting assembly 34 to move. The connecting assembly 34 is used to drive the return plate assembly 10 to move through the first drive arm assembly 31 and to drive the upper screen box assembly 20 to move through the second drive arm assembly 32.

[0039] The 3D cleaning system for combine harvesters provided by this invention drives the connecting assembly 34 to move via the driving assembly 33. The connecting assembly 34 drives the return plate component 10 to move via the first driving arm assembly 31. This independent transmission path provides driving force for the movement of the return plate component 10. Simultaneously, the connecting assembly 34 drives the upper screen box component 20 to move via the second driving arm assembly 32. This independent transmission path provides driving force for the reciprocating motion of the upper screen box component 20. The power transmitted from the driving assembly 30 is delivered to the first driving arm assembly 31 and the second driving arm assembly 32 via the connecting assembly 34, thereby decoupling the movement of the return plate component 10 and the upper screen box component 20. This allows the return plate component 10 and the upper screen box component 20 to move independently based on their respective linkage mechanisms. This structural design avoids interference between the upper screen box component 20 and the movement of the return plate component 10 during lateral vibration (e.g., compensatory movements to adapt to slope operations). This ensures the stability of the return plate component 10 during operation, preventing abnormal vibration or deviation of its movement trajectory due to the lateral vibration of the upper screen box component 20, thereby helping to ensure the conveying effect of materials on the return plate component 10.

[0040] In one embodiment of the present invention, such as Figure 1 , Figure 3 , Figure 5 and Figure 7 As shown, the connecting assembly 34 includes a triangular fork 340 and a drive connecting assembly 345. The triangular fork 340 is triangular in shape and has a first connecting hole 341, a second connecting hole 342, a third connecting hole 343, and a fourth connecting hole 344. The multiple connecting holes allow the triangular fork 340 to function as a multi-point connected lever mechanism, decomposing a single power input and transmitting it to different actuators. The third connecting hole 343 is located between the first connecting hole 341 and the second connecting hole 342. Positioning the third connecting hole 343, which serves as a pivot point, between the first and second connecting holes 341 and 342 forms a lever structure, thereby converting the stroke and direction of the input motion. The fourth connecting hole 344 is located on one side of the line connecting the centers of the first and second connecting holes 341 and 342. When the drive assembly 30 transmits power to the triangular fork 340, the triangular fork 340 swings around the central axis of the third connecting hole 343.

[0041] Specifically, such as Figure 5As shown, the first connecting hole 341, the second connecting hole 342, and the fourth connecting hole 344 are located at the three corners of a triangle. Positioning these connecting holes at the corners of the triangle creates a relatively long lever arm within the limited structural space, enabling efficient transmission of motion and force. Preferably, the fourth connecting hole 344 is located on the side of the line connecting the centers of the first connecting hole 341 and the second connecting hole 342, closer to the second drive arm assembly 32. The centers of the first connecting hole 341, the second connecting hole 342, and the third connecting hole 343 are on the same straight line. When the drive assembly 33 inputs power through the second connecting hole 342, the tripod arm 340 swings around the third connecting hole 343, causing the first connecting hole 341 to swing in the opposite direction, thereby driving the first drive arm assembly 31 to move. The length of the line connecting the center of the first connecting hole 341 and the center of the third connecting hole 343 is L1, the length of the line connecting the center of the third connecting hole 343 and the center of the fourth connecting hole 344 is L2, and the length of the line connecting the center of the second connecting hole 342 and the center of the third connecting hole 343 is L3. By adjusting these three dimensional parameters L1, L2, and L3, the movement of the return plate component 10 and the upper screen box component 20 can be controlled respectively to meet the cleaning operation requirements of different scenarios.

[0042] The second connecting hole 342 is rotatably connected to the drive assembly 33. This connection point serves as the power input end of the triangular arm 340, receiving the driving force transmitted from the drive assembly 33 and causing the triangular arm 340 to move around this connection point. The third connecting hole 343 is rotatably connected to the side wall of the frame, hinged to the side wall of the frame, forming a fixed pivot point, allowing the triangular arm 340 to swing around this pivot point. The fourth connecting hole 344 is rotatably connected to the second drive arm assembly 32, serving as the power output point for driving the upper screen box component 20. It transmits the motion trajectory of the fourth connecting hole 344 when the triangular arm 340 swings to the second drive arm assembly 32, thereby driving the upper screen box component 20. The drive connecting assembly 345 is disposed in the first connecting hole 341 and rotatably connected to the first drive arm assembly 31. As a connecting member, the drive connecting assembly 345 provides support for the rotatable connection and increases wear resistance, helping to ensure the reliability of the rotatable pair connection.

[0043] In one embodiment of the present invention, the tripod arm 340 is provided with a hollow portion. By providing a hollow portion on the tripod arm 340, while meeting the rigidity requirements for its operation, some material in non-primary load-bearing areas is removed, thereby reducing the weight of the tripod arm 340. Since the tripod arm 340 is a reciprocating oscillating motion component, its weight reduction helps to reduce its moment of inertia. During rotation, the lower moment of inertia reduces the driving torque required by the power system to achieve the same acceleration, which helps to reduce the energy consumption of the drive system and lighten the load on the drive assembly 33.

[0044] In one embodiment of the present invention, such as Figure 5 and Figure 7 As shown, the drive connection assembly 345 includes a first rubber sleeve 346, a first spacer 347, a first bolt 348, and a first flat washer 349. The first rubber sleeve 346 has a hollow tubular structure and passes through the first connecting hole 341. The first rubber sleeve 346 can absorb the vibration and impact energy generated between the first connecting hole 341 and the internal components during movement, reduce hard friction and collision between components, and thus extend the service life of the transmission structure. The first spacer 347 passes through the first rubber sleeve 346, and the first end of the first spacer 347 is connected to the first drive arm assembly 31. The first spacer 347 and the first rubber sleeve 346 are coaxially arranged.

[0045] Preferably, a limiting ring is provided on the outer peripheral surface of the first end of the first spacer 347. The limiting ring abuts against the side of the first rubber sleeve 346 facing the first drive arm assembly 31, that is, the limiting ring abuts against the side of the first rubber sleeve 346 facing the return disk drive arm 310. The limiting ring physically blocks the first rubber sleeve 346 in the axial direction to prevent the first rubber sleeve 346 from axially sliding or falling out during long-term reciprocating swing, thus ensuring the stability of the assembly position and the reliability of the connection between the components of the drive connection assembly 345.

[0046] The length of the first bolt 348 is greater than the length of the first spacer 347, so that after the first bolt 348 passes through the first spacer 347, there is sufficient space at both ends for installing fasteners. The first bolt 348 passes through the interior of the first spacer 347 and is coaxially arranged with the first spacer 347. The nut of the first bolt 348 abuts against the first drive arm assembly 31 (i.e., the return disc drive arm 310). The first flat washer 349 is fitted onto the first bolt 348 and is located on the side of the first rubber sleeve 346 opposite to the first drive arm assembly 31. The nut of the first bolt 348 abuts against the side of the first flat washer 349 opposite to the first spacer 347, thereby axially locking the entire drive connection assembly 345 and the three-way arm 340, preventing relative loosening or detachment of the components under the complex and high-frequency vibration conditions of the combine harvester.

[0047] In one embodiment of the present invention, such as Figure 5 and Figure 7As shown, the drive connection assembly 345 also includes a washer 350 and a gasket 351. The washer 350 is fitted onto the first bolt 348 and located between the nut and the first drive arm assembly 31. The washer 350 is used to increase the contact area between the nut and the first drive arm assembly 31 (i.e., the return disc drive arm 310). The gasket 351 is fitted onto the first bolt 348 and located between the nut and the first flat washer 349. The gasket 351 is used to increase the contact area between the nut and the first flat washer 349, so that the preload generated when the nut is tightened can be evenly transmitted to the first flat washer 349, avoiding deformation of the first flat washer 349 due to local stress concentration, and ensuring the tightness and reliability of the drive connection assembly 345 under complex and high-frequency vibration conditions of the combine harvester.

[0048] In one embodiment of the present invention, a first gap 352 is formed between the end face of the second end of the first spacer 347 and the first flat washer 349.

[0049] It should be noted that the upper screen box drive arm 321 and the fourth connecting hole 344 are rotatably connected by a connecting assembly. The structure of this connecting assembly is the same as that of the drive connecting assembly 345, and will not be described in detail here.

[0050] In one embodiment of the present invention, such as Figure 3 , Figure 4 and Figure 6 As shown, the drive assembly 33 is used to transmit the power input from the drive system to the three-way arm 340. The drive assembly 33 includes a pulley 330, a cam 331 and a first push rod 332. The shaft of the pulley 330 is rotatably connected to the side wall of the frame, providing a stable rotational support base for the pulley 330 and ensuring that the pulley 330 can rotate smoothly. Cam 331 is sleeved on the shaft of pulley 330, enabling cam 331 to rotate synchronously with pulley 330. Utilizing its own eccentric structure or specific profile, cam 331 converts the continuous rotational motion of pulley 330 into periodic driving force. The first end of the first push rod 332 is rotatably connected to cam 331, allowing the first push rod 332 to reciprocate along the eccentric rotation trajectory of cam 331, thus transitioning from rotational motion to linear motion. The second end of the first push rod 332 is rotatably connected to the second connecting hole 342, continuously transmitting the reciprocating push-pull force to the power input end of the three-pronged arm 340, driving the three-pronged arm 340 to swing around the fulcrum, providing a stable and reliable power source for the return plate component 10 and the upper screen box component 20.

[0051] Furthermore, the 3D cleaning system for the combine harvester also includes a lower screen box component 50, which includes a lower cleaning screen, and an upper screen box component 20, which includes an upper cleaning screen. The lower screen box component 50 and the upper screen box component 20 constitute a multi-stage cleaning structure, which improves the separation accuracy of grains and impurities in the sifted material. The lower screen box component 50 is located below the upper screen box component 20 and receives the sifted material after screening by the upper screen box component 20, realizing the step-by-step layered cleaning of materials, while improving the utilization rate of the vertical space inside the combine harvester. The lower screen box component 50 and the upper screen box component 20 are connected by a connecting rod. In operation, the two ends of the connecting rod oscillate relative to each other as the upper screen box component 20 and the lower screen box component 50 operate. The connecting rod closest to the pulley 330 is rotatably connected to the cam 331 via a second push rod. The cam 331 rotates with the pulley 330 and drives the second push rod to reciprocate. The second push rod then pulls or pushes the connecting rod to oscillate around its connection point with the upper screen box component 20, thus achieving power distribution from the same power source to multiple screen boxes. When the pulley 330 rotates, it sequentially drives the lower screen box component 50 along the length of the upper screen box component 20 (i.e.,...) via the cam 331 and the second push rod. Figure 3 It moves back and forth in the left and right directions.

[0052] In one embodiment of the present invention, such as Figure 3 and Figure 4 As shown, the first drive arm assembly 31 includes a return plate drive arm 310 and a return plate front swing arm 311. The return plate drive arm 310 and the return plate front swing arm 311 constitute a linkage guide mechanism for driving the return plate component 10, transmitting the power from the tripod arm 340 to the return plate component 10. The first end of the return plate drive arm 310 is sleeved on the first end of the first spacer 347. During operation, the first end of the return plate drive arm 310 can move synchronously with the swing of the tripod arm 340, ensuring that the power is stably transmitted from the tripod arm 340 to the return plate drive arm 310, reducing the connection gap and power loss during the transmission process.

[0053] The return plate component 10 is provided with a first fixed bearing 312, and the return plate component 10 is connected to the first fixed bearing 312 by bolts. The first end of the return plate front swing arm 311 and the second end of the return plate drive arm 310 are both rotatably connected to the first fixed bearing 312. Under the action of driving force, the return plate drive arm 310 drives the first fixed bearing 312 to move.

[0054] A second fixed bearing 313 is provided on the side wall of the frame, providing a stable rotation fulcrum for the return disc drive arm 310 and the return disc front swing arm 311, ensuring the stability of the components during operation. The second end of the return disc front swing arm 311 and the second drive arm assembly 32 are both rotatably connected to the second fixed bearing 313. The second end of the return disc front swing arm 311 and the second drive arm assembly 32 can swing independently around the axis of the second fixed bearing 313, concentrating the rear support point of the return disc front swing arm 311 and the support point of the second drive arm assembly 32 on the same bearing, improving the utilization rate of the space on the side wall of the combine harvester frame, and ensuring that the return disc component 10 has a definite motion trajectory during reciprocating motion.

[0055] In one embodiment of the present invention, such as Figure 3 and Figure 5 As shown, the length of the return plate front swing arm 311 is equal to the length of the line connecting the centers of the first connecting hole 341 and the third connecting hole 343. During the movement, the tripod arm 340 swings around the third connecting hole 343 and drives the first connecting hole 341 to move along an arc trajectory. The second end of the return plate front swing arm 311 swings around a fixed point to guide its first end to move along an arc. The return plate front swing arm 311 is parallel to the line connecting the centers of the first connecting hole 341 and the third connecting hole 343, so that the return plate front swing arm 311, the relevant parts of the tripod arm 340, and the return plate drive arm 310 form a parallelogram linkage transmission mechanism in space. When the tripod arm 340 drives the return plate drive arm 310 to reciprocate through the first connecting hole 341, the return plate front swing arm 311 swings synchronously, ensuring the attitude stability of the return plate component 10 during the reciprocating vibration process.

[0056] In one embodiment of the present invention, such as Figure 3 and Figure 5 As shown, the second drive arm assembly 32 includes an upper screen box front swing arm 320 and an upper screen box drive arm 321. The upper screen box front swing arm 320 and the upper screen box drive arm 321 constitute an independent linkage mechanism for transmitting power and guiding the movement of the upper screen box component 20, realizing the transmission of power from the tripod arm 340 to the upper screen box component 20. The first end of the upper screen box front swing arm 320 is rotatably connected to the second fixed shaft seat 313. When working, the upper screen box front swing arm 320 swings around the axis of the second fixed shaft seat 313, providing a stable rotation fulcrum for the upper screen box front swing arm 320. The second end of the upper screen box front swing arm 320 is rotatably connected to the upper screen box component 20. When the upper screen box front swing arm 320 swings, its second end moves along an arc trajectory, thereby pulling the upper screen box component 20 to perform corresponding reciprocating displacement. Preferably, the second end of the upper screen box front swing arm 320 is rotatably connected to the upper screen box component 20 through the fixed shaft seat.

[0057] The first end of the upper screen box drive arm 321 is rotatably connected to the upper screen box front swing arm 320. After receiving power, the upper screen box drive arm 321 can push or pull the upper screen box front swing arm 320 to swing around its fulcrum, thus realizing power transmission. The connection point between the first end of the upper screen box drive arm 321 and the upper screen box front swing arm 320 is located near the second end of the upper screen box front swing arm 320. The second end of the upper screen box drive arm 321 is rotatably connected to the fourth connecting hole 344. When the tripod arm 340 swings, the fourth connecting hole 344 drives the upper screen box drive arm 321 to perform reciprocating push-pull motion, providing continuous and stable power to the upper screen box component 20.

[0058] In one embodiment of the present invention, such as Figure 3 and Figure 5 As shown, the length of the upper screen box front swing arm 320 is equal to the length of the line connecting the centers of the third connecting hole 343 and the fourth connecting hole 344. During the movement, the tripod arm 340 swings around the third connecting hole 343 and drives the fourth connecting hole 344 to move along an arc trajectory. The first end of the upper screen box front swing arm 320 swings around the second fixed shaft seat 313 to guide its second end to perform an arc movement. The upper screen box front swing arm 320 is parallel to the line connecting the centers of the third connecting hole 343 and the fourth connecting hole 344, so that the upper screen box front swing arm 320, the relevant parts of the tripod arm 340, and the upper screen box drive arm 321 form a parallelogram linkage transmission mechanism in space. When the tripod arm 340 drives the upper screen box drive arm 321 to perform reciprocating translational motion through the fourth connecting hole 344, the upper screen box front swing arm 320 performs synchronous translational swinging accordingly.

[0059] This double parallelogram linkage transmission mechanism separates the motion paths of the return plate component 10 and the upper screen box component 20, achieving physical decoupling between them during power transmission. This allows the return plate component 10 and the upper screen box component 20 to operate independently based on their respective mechanism characteristics, avoiding motion interference caused by sharing a transmission path. While enabling the upper screen box component 20 to vibrate laterally, it does not interfere with the return plate component 10, ensuring the stability of the material conveying process of the return plate component 10. This prevents the return plate component 10 from experiencing abnormal shaking or trajectory deviation due to the lateral compensation displacement of the upper screen box component 20 to adapt to slope operation, thereby maintaining the overall cleaning quality and structural stability of the combine harvester under complex working conditions.

[0060] like Figure 1As shown in Figure 2, the 3D cleaning system for a combine harvester also includes a lateral vibration component 40, a controller, and a sensor. The upper screen box component 20 is movably connected to the side wall of the frame. The lateral vibration component 40 includes a lateral vibration assembly 41 and a linear drive component 42. The lateral vibration assembly 41 is connected to the upper screen box component 20 and the side wall of the frame, and the linear drive component 42 is connected to the side wall of the frame and the lateral vibration assembly 41. The controller is electrically connected to the linear drive component 42, and the sensor is electrically connected to the controller. The sensor is used to detect the lateral amplitude value of the upper screen box component 20 and send the detected lateral amplitude value to the controller. The controller is used to determine the difference between the lateral amplitude value and the theoretical amplitude value. If the difference is greater than a preset value, the sensor controls the linear drive component 42 to drive the lateral vibration assembly 41 to rotate, thereby changing the deflection angle of the lateral vibration assembly 41 so that the lateral amplitude value is equal to the theoretical amplitude value.

[0061] The 3D cleaning system for combine harvesters provided by this invention detects the lateral amplitude value of the upper screen box component 20 through sensors and sends the detected lateral amplitude value to the controller. Since the sensors directly detect the lateral amplitude value of the upper screen box component 20, errors caused by detecting other intermediate variables are avoided, thus improving the accuracy of obtaining the lateral amplitude. The controller determines the difference between the lateral amplitude value and the theoretical amplitude value. When the difference is greater than a preset value, the sensor controls the linear drive component 42 to drive the lateral vibration component 41 to rotate. During this process, the telescopic end of the linear drive component 42 performs linear telescopic motion, thereby pushing the lateral vibration component 41 to rotate around its connection point, so as to change the deflection angle of the lateral vibration component 41 and make the lateral amplitude value equal to the theoretical amplitude value. By using a closed-loop control method to adjust the lateral amplitude value, the amplitude control accuracy of the upper screen box component 20 is improved, making the material distribution on the screen surface of the upper screen box component 20 more uniform, reducing the local accumulation of material, and thus enhancing the cleaning effect of the upper screen box component 20.

[0062] It should be noted here that, as Figure 14 and Figure 15 As shown, the vibration directions of the upper screen box component 20 include the X direction, the Y direction and the Z direction. The vibration in the X direction is along the length direction of the upper screen box component 20, the vibration in the Y direction is along the width direction of the upper screen box component 20, and the vibration in the Z direction is along the up and down direction.

[0063] In one embodiment of the present invention, the sensor includes a laser rangefinder, which enables non-contact distance measurement. The laser rangefinder is mounted on the side wall of the frame, which provides a stable mounting platform for the laser rangefinder. During operation, the lateral vibration component 41 reciprocates relative to the side wall of the frame. The laser rangefinder obtains the lateral amplitude value of the upper screen box component 20 by detecting the change in distance between itself and the lateral vibration component 41. This method improves the accuracy of obtaining the lateral amplitude value by directly monitoring the dynamic distance change during operation, providing a reliable data basis for the closed-loop adjustment of the controller.

[0064] In one embodiment of the present invention, such as Figure 11 As shown, the linear drive component 42 includes an electric push rod. Compared to other linear drive components such as hydraulic cylinders, the electric push rod offers higher control precision, thereby further improving the amplitude control precision of the upper screen box component 20. The housing of the electric push rod is rotatably connected to the side wall of the frame, and the telescopic rod of the electric push rod is rotatably connected to the transverse vibration component 41. During operation, the housing of the electric push rod can deflect relative to its connection point with the side wall of the frame, while the telescopic rod of the electric push rod rotates relative to its connection point with the transverse vibration component 41. The electric push rod drives the first support 411 and the second support 412 to rotate around their hinge point with the connecting seat 410 through the linear extension and retraction of the telescopic rod, thereby converting linear motion into rotational motion to change the deflection angle of the transverse vibration component 41. This motion conversion mechanism enables continuous and precise adjustment of the deflection angle of the transverse vibration component 41, thus achieving accurate adjustment of the transverse amplitude value.

[0065] In one embodiment of the present invention, such as Figure 9 and Figure 10 As shown, the transverse vibration assembly 41 includes a connecting seat 410, a first support 411, a second support 412, a rocker arm 413, and a screen box connecting arm 414. The connecting seat 410 is connected to the side wall of the frame, providing a stable mounting foundation for the entire transverse vibration assembly 41. The connecting seat 410 has a through hole, and both ends of the connecting seat 410 are provided with first connecting portions 418, with the through hole located between the two first connecting portions 418. The first end of the first support 411 is rotatably connected to one of the first connecting portions 418, that is, the first end of the first support 411 is connected to... Figure 10 The first connecting part 418 on the front side of the middle is rotatably connected.

[0066] The second support 412 is arranged at a distance from the first support 411. The first end of the second support 412 is rotatably connected to another first connecting part 418, that is, the first end of the second support 412 is... Figure 10The first connecting part 418 on the rear side is rotatably connected. Both the second support 412 and the first support 411 are rotatably connected to the telescopic rod of the electric actuator. When the telescopic rod performs linear reciprocating motion, the first support 411 and the second support 412 simultaneously deflect at an angle. The electric actuator drives the first support 411 and the second support 412 to rotate around their connection point with the first support 411. By converting the linear displacement of the electric actuator into the rotational displacement of the supports, continuous adjustment of the deflection angle of the lateral vibration component 41 is achieved, improving the reliability of motion conversion. Furthermore, for ease of connection, a connecting piece is provided on the side of the second support 412 and the first support 411 facing the electric actuator. The telescopic rod of the electric actuator is hinged to the first support 411 and the connecting piece of the first support 411.

[0067] A rocker arm 413 is disposed between a first support 411 and a second support 412. The first end of the rocker arm 413 is rotatably connected to the second ends of both the first support 411 and the second support 412 via a rubber sleeve. Preferably, the distance between the first support 411 and the second support 412 gradually increases from the first end of the first support 411 to the second end of the first support 411. The first end of a screen box connecting arm 414 is rotatably connected to the second end of the rocker arm 413, and the second end of the screen box connecting arm 414 is connected to the upper screen box component 20 after passing through a through hole.

[0068] In one embodiment of the present invention, such as Figure 10 As shown, the second end of the rocker arm 413 is provided with two second connecting parts at intervals. This double support point structure design improves the structural load-bearing capacity and connection stability of the end of the rocker arm 413. The two second connecting parts are symmetrically arranged, and the first end of the screen box connecting arm 414 is rotatably connected to the two second connecting parts. The first end of the screen box connecting arm 414 can be placed between the two second connecting parts.

[0069] In one embodiment of the present invention, such as Figure 9 and Figure 10 As shown, the first end of the screen box connecting arm 414 is provided with a mounting hole, which provides installation space for the connecting arm connecting assembly. The transverse vibration assembly 41 also includes a connecting arm connecting assembly, which includes a second rubber sleeve 415, a second spacer 416, a second bolt 417, a second flat washer 419, and a third flat washer 420. The second rubber sleeve 415 passes through the mounting hole.

[0070] The second spacer 416 passes through the interior of the second rubber sleeve 415, and the second spacer 416 and the second rubber sleeve 415 are coaxially arranged. The length of the second spacer 416 is greater than the length of the second rubber sleeve 415. One second connecting part is sleeved on the first end of the second spacer 416, and the other second connecting part is sleeved on the second end of the second spacer 416. The second bolt 417 passes through the interior of the second spacer 416, and the second bolt 417 is coaxially arranged with the second spacer 416. The length of the second bolt 417 is greater than the length of the second spacer 416.

[0071] The second flat washer 419 is fitted onto the first end of the second bolt 417 and is located between a second connecting part and the nut of the second bolt 417. One side of the second flat washer 419 abuts against the nut, and the other side of the second flat washer 419 abuts against a second connecting part ( Figure 9 The second flat washer 419 abuts against the second connecting part on the left side of the middle section. This increases the force-bearing area when the nut is tightened, preventing excessive local compressive stress from causing indentations or deformation at the interface. The third flat washer 420 is fitted onto the second end of the second bolt 417 and is located between the other second connecting part and the nut of the second bolt 417. One side of the third flat washer 420 abuts against the nut, and the other side of the third flat washer 420 abuts against the other second connecting part (…). Figure 9 The second connecting part on the right side of the nut abuts against the nut, and the third flat washer 420 also disperses the axial locking stress at the end of the nut.

[0072] In one embodiment of the present invention, such as Figure 9 As shown, the connecting arm assembly includes a spring washer 424, which is fitted onto the second end of the second bolt 417 and located between the third flat washer 420 and the nut of the second bolt 417. The spring washer 424 provides preload and absorbs and buffers the axial impact load generated by lateral vibration. A second gap 421 exists between the end face of the first end of the second spacer 416 and the second flat washer 419, with a width of 1.5-2 mm.

[0073] In one embodiment of the present invention, such as Figure 8 and Figure 10As shown, the transverse vibration assembly 41 also includes two mounted bearings 422, which are symmetrically arranged. The first end of the first support 411 is rotatably connected to a first connecting part 418 via one mounted bearing 422; the first end of the second support 412 is rotatably connected to another first connecting part 418 via the other mounted bearing 422. During operation, the first ends of the first support 411 and the first ends of the second support 412 can rotate with their respective first connecting parts 418 via the mounted bearings 422. This rotating connection method uses rolling friction instead of direct contact sliding friction, reducing mechanical resistance and frictional heat generation during high-frequency oscillation, and extending the service life of the transverse vibration assembly 41.

[0074] In one embodiment of the present invention, such as Figure 1 and Figure 2 As shown, the upper screen box component 20 has two suspension points on the same side for connecting to the side wall of the frame. The upper screen box component 20 can reciprocate relative to the side wall of the frame through the suspension points. The two suspension points are arranged at intervals along the length of the upper screen box component 20. The projection of the center of gravity of the upper screen box component 20 is located on the line connecting the two suspension points on the same side. The transverse vibration component 41 is set at the projection point. By setting the transverse vibration component 41 at the projection point, the transverse vibration component 41 is closer to the center of gravity of the upper screen box component 20. During the driving process, when the transverse vibration component 41 pushes the upper screen box component 20 to produce transverse reciprocating displacement, the lever arm in the power transmission process is shortened, and the energy loss is reduced. This makes the transverse vibration of the upper screen box component 20 more stable, ensuring the uniform screening and distribution of the cleaning material on the screen surface. At the same time, it makes the transverse vibration component 41 more uniformly stressed, extending the service life of the drive component 30 and the suspension connection component.

[0075] A certain movement gap is maintained between the screen box connecting arm 414 and the welded nut on the side wall of the frame. The theoretical maximum lateral vibration distance on one side is 15mm, and the maximum lateral amplitude of the upper screen box component 20 is 30mm. Due to limited space for the lateral vibration component 41, the length of the rocker arm 413 should not be too long. When the machine body is tilted at a certain angle γ, the length of the rocker arm 413 is 280mm, and the rotation angle of the lateral vibration component 41 is 30°, the theoretical amplitude of the upper screen box component 20 is b3 (obtained by referring to a table; the corresponding data for different crops needs to be obtained through experiments). The laser rangefinder installed on the side wall of the frame detects the actual amplitude c3 of the upper screen box component 20. The actual amplitude c3 and b3 are compared. When the difference is greater than the preset value (2mm), the electric push rod drives the first support 411 and the second support 412 to rotate around the hinge point between itself and the connecting seat 410 through the extension and retraction of the telescopic rod, changing the deflection angle of the lateral vibration component 41, so that the measured value c3 is equal to the theoretical value b3. The specific correspondence is shown in Table 1.

[0076] Table 1

[0077] like Figure 12 As shown, in order to cope with the situation where the material tilts and accumulates to the right due to the harvesting operation of the combine harvester on the slope, the electric push rod pushes the first support 411 and the second support 412 to move, and synchronously drives the rocker arm to swing in the direction of O'A. The screen box connecting arm 414 performs a reciprocating translational motion along the arc C'AC”. The motion trajectory of the upper screen box component becomes an oblique motion from the upper right to the lower left (from efgh to e'f'g'h'), causing the material to vibrate to the left and rear.

[0078] like Figure 13 As shown, in order to cope with the situation where the material tilts and accumulates to the left due to the harvesting operation of the combine harvester on the slope, the electric push rod pushes the first support 411 and the second support 412 to move, and synchronously drives the rocker arm to swing in the direction of O'A. The screen box connecting arm 414 moves back and forth along the arc D'AD”, and the movement trajectory of the upper screen box component becomes an oblique movement from the upper left to the lower right (from ijkl to i'j'k'l'), causing the material to vibrate to the right and rear.

[0079] The present invention also provides a combine harvester, the combine harvester including the 3D cleaning system for the combine harvester described in any of the above embodiments.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A 3D cleaning system for combine harvesters, characterized in that, include: Return disk component (10); The upper screen box component (20) is located below the return plate component (10); The driving component (30) includes a first driving arm assembly (31), a second driving arm assembly (32), a driving component (33), and a connecting component (34). The first driving arm assembly (31) is rotatably connected to the return plate component (10) and the side wall of the frame. The second driving arm assembly (32) is rotatably connected to the upper screen box component (20) and the side wall of the frame. The driving component (33) is rotatably connected to the side wall of the frame, the first driving arm assembly (31), the second driving arm assembly (32), and the driving component (33). The driving component (33) is used to drive the connecting component (34) to move. The connecting component (34) is used to drive the return plate component (10) to move through the first driving arm assembly (31) and drive the upper screen box component (20) to move through the second driving arm assembly (32).

2. The 3D cleaning system for a combine harvester according to claim 1, characterized in that, The connection component (34) includes: A three-pronged arm (340) is provided with a first connecting hole (341), a second connecting hole (342), a third connecting hole (343), and a fourth connecting hole (344). The third connecting hole (343) is located between the first connecting hole (341) and the second connecting hole (342), and the fourth connecting hole (344) is located on one side of the center line connecting the first connecting hole (341) and the second connecting hole (342). The second connecting hole (342) is rotatably connected to the drive assembly (33), the third connecting hole (343) is rotatably connected to the side wall of the frame, and the fourth connecting hole (344) is rotatably connected to the second drive arm assembly (32). A drive connection assembly (345) is rotatably connected to the first connection hole (341) and the first drive arm assembly (31).

3. The 3D cleaning system for a combine harvester according to claim 2, characterized in that, The first drive arm assembly (31) includes a return plate drive arm (310) and a return plate front swing arm (311). The second drive arm assembly (32) includes an upper screen box front swing arm (320) and an upper screen box drive arm (321). The length of the upper screen box front swing arm (320) is equal to the length of the center line connecting the third connecting hole (343) and the fourth connecting hole (344). The upper screen box front swing arm (320) is parallel to the center line connecting the third connecting hole (343) and the fourth connecting hole (344). The length of the return plate front swing arm (311) is equal to the length of the center line connecting the first connecting hole (341) and the third connecting hole (343). The return plate front swing arm (311) is parallel to the center line connecting the first connecting hole (341) and the third connecting hole (343).

4. The 3D cleaning system for a combine harvester according to claim 2, characterized in that, The drive connection assembly (345) includes: The first rubber sleeve (346) is inserted into the first connecting hole (341); The first spacer (347) is inserted inside the first rubber sleeve (346), and the first end of the first spacer (347) is connected to the first drive arm assembly (31). The first bolt (348) passes through the inside of the first spacer (347), and the nut of the first bolt (348) abuts against the first drive arm assembly (31); The first flat washer (349) is fitted onto the first bolt (348) and is located on the side of the first rubber sleeve (346) away from the first drive arm assembly (31). The nut of the first bolt (348) abuts against the side of the first flat washer (349) away from the first spacer (347).

5. The 3D cleaning system for a combine harvester according to claim 4, characterized in that, The drive connector (345) also includes: A washer (350) is fitted onto the first bolt (348) and located between the nut and the first drive arm assembly (31); Washer (351) is fitted onto the first bolt (348) and located between the nut and the first flat washer (349).

6. The 3D cleaning system for a combine harvester according to claim 4 or 5, characterized in that, There is a first gap (352) between the end face of the second end of the first spacer (347) and the first flat washer (349).

7. The 3D cleaning system for a combine harvester according to any one of claims 2 to 5, characterized in that, The driving component (33) includes: A pulley (330) has its shaft rotatably connected to the side wall of the frame; Cam (331), sleeved on the shaft of the pulley (330); The first push rod (332) has its first end rotatably connected to the cam (331) and its second end rotatably connected to the second connecting hole (342).

8. The 3D cleaning system for a combine harvester according to claim 4 or 5, characterized in that, The first end of the return disk drive arm (310) is sleeved on the first end of the first spacer (347); The return plate component (10) is provided with a first fixed bearing (312). The first end of the return plate front swing arm (311) and the second end of the return plate drive arm (310) are rotatably connected to the first fixed bearing (312). The side wall of the frame is provided with a second fixed bearing (313). The second end of the return plate front swing arm (311) and the second drive arm assembly (32) are rotatably connected to the second fixed bearing (313).

9. The 3D cleaning system for a combine harvester according to claim 8, characterized in that, The first end of the upper screen box front swing arm (320) is rotatably connected to the second fixed shaft seat (313), and the second end of the upper screen box front swing arm (320) is rotatably connected to the upper screen box component (20); The first end of the upper screen box drive arm (321) is rotatably connected to the upper screen box front swing arm (320), and the second end of the upper screen box drive arm (321) is rotatably connected to the fourth connecting hole (344).

10. A combine harvester, characterized in that, The combine harvester includes the 3D cleaning system for a combine harvester as described in any one of claims 1 to 9.

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