Cleaning device and harvester

Abstract

The utility model discloses a cleaning device and a harvester, a screen box of the cleaning device is rotatably connected to a rack around a first axis along an eccentric adjusting piece at a first end of a first direction and rotatably connected to the screen box around a second axis, and the first axis and the second axis are parallel and are distributed at an interval; the eccentric adjusting piece can drive the second end of the screen box to move in a directional direction and rotate relative to the rack. The first direction, the extension direction of the first axis and the height direction of the screen box are perpendicular in pairs, the orientation is parallel to the plane where the first direction and the height direction of the screen box are located, and the orientation is parallel to the first direction or forms an included angle with the first direction. The pre-cleaning screen is located above the main cleaning assembly and used for screening materials. The pre-cleaning screen is rotationally connected with the screen box at the first position and movably connected with the rack at the second position, and the first position and the second position are distributed at intervals in the first direction. The feeding amount in unit time of the cleaning device can be increased, the screening efficiency and quality can be improved, and the production cost of the cleaning device and the use cost of a user can be reduced.

Description

Cleaning equipment and harvester Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a cleaning device and a harvester. Background Technology

[0002] The cleaning device is an important component of the harvester, and its performance directly affects the feed rate, cleaning efficiency, and cleaning quality per unit time of the harvester.

[0003] Currently, in order to improve the working performance of cleaning devices, the following two approaches are commonly used in existing technologies: one is to increase the structural size of the cleaning device, which can increase the feed rate, cleaning efficiency and cleaning quality of the harvester, but will significantly increase the production cost of the harvester and the user's operating cost; the other is to install a pre-cleaning screen on the top of the cleaning screen box, so that the harvester's feeding rate can be increased and the cleaning efficiency and cleaning quality can be improved, but the cleaning efficiency and cleaning quality still need to be improved. Summary of the Invention

[0004] The purpose of this invention is to provide a cleaning device and a harvester to solve the aforementioned problems existing in the cleaning devices of the prior art.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] The cleaning device includes a frame and also includes:

[0007] A sieve box has an eccentric adjustment member at its first end along a first direction. The eccentric adjustment member is rotatably connected to the frame around a first axis and rotatably connected to the sieve box around a second axis. The first axis and the second axis are parallel and spaced apart. The eccentric adjustment member can drive the second end of the sieve box to move along a direction and rotate relative to the frame. The first direction, the extension direction of the first axis, and the height direction of the sieve box are perpendicular to each other. The orientation is parallel to the plane containing the first direction and the height direction of the sieve box, and the orientation is parallel to or at an angle to the first direction.

[0008] A main cleaning component, which is disposed inside the screen box and used for screening materials;

[0009] A pre-cleaning screen is located above the main cleaning assembly along the height direction of the screen box and is used for screening materials; the pre-cleaning screen is rotatably connected to the screen box at a first position and movably connected to the frame at a second position, and the first position and the second position are spaced apart along the first direction.

[0010] As a preferred embodiment of the above-mentioned cleaning device, the pre-cleaning screen is located above the screen box; and / or,

[0011] The pre-cleaning screen is set at an angle to the preset plane. The plane containing the first direction and the extension direction of the first axis is the preset plane. Along the first direction, one end of the pre-cleaning screen near the second end of the screen box is located above the other end.

[0012] As a preferred embodiment of the above-mentioned cleaning device, the cleaning device further includes a first connecting member, wherein the pre-cleaning screen is rotatably connected to one end of the first connecting member at the second position, and the other end of the first connecting member is rotatably connected to the frame.

[0013] As a preferred embodiment of the above-mentioned cleaning device, there are two first connecting members, and the two first connecting members are located at the two ends of the pre-cleaning screen along the second direction, which is parallel to the extension direction of the first axis.

[0014] As a preferred embodiment of the above-mentioned cleaning device, the cleaning device further includes a hinged seat, which is fixedly connected to the screen box and rotatably connected to the pre-cleaning screen at the first position.

[0015] As a preferred embodiment of the above-mentioned cleaning device, the main cleaning component includes at least two cleaning screens, which are distributed sequentially along the first direction. The upstream screen of any two adjacent screens can output the screened material to the downstream screen, and the material falling onto the downstream screen can be screened and output to the outside of the screen box.

[0016] As a preferred embodiment of the above-mentioned cleaning device, at least two of the cleaning screens include a shaking plate, a main cleaning screen, and a tail screen. The shaking plate is disposed at the second end of the screen box, the tail screen is disposed at the first end of the screen box, and the main cleaning screen is located between the shaking plate and the tail screen. The orthographic projection of the pre-cleaning screen along the height direction of the screen box at least covers part of the main cleaning screen.

[0017] As a preferred embodiment of the above-mentioned cleaning device, the eccentric adjustment component includes a first disc, which is rotatably connected to the frame around the first axis, and the second axis is the central axis of the first disc. A rotating ring is fixedly provided at the first end of the screen box, and the rotating ring is rotatably sleeved on the outer periphery of the first disc.

[0018] As a preferred embodiment of the above-mentioned cleaning device, one of the second end of the screen box and the frame is provided with a first elongated hole extending along the direction, and the other is provided with a first moving member, wherein one of the first moving member and the first elongated hole can move and rotate relative to the other.

[0019] Harvester, including the cleaning device described above.

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides a cleaning device and a harvester. The cleaning device includes a frame, a screen box, a main cleaning assembly, and a pre-cleaning screen. An eccentric adjustment member is provided at the first end of the screen box along a first direction. The eccentric adjustment member is rotatably connected to the frame around a first axis and rotatably connected to the screen box around a second axis. The first axis and the second axis are parallel and spaced apart. The eccentric adjustment member can drive the second end of the screen box to move along a direction and rotate relative to the frame. The first direction, the extension direction of the first axis, and the height direction of the screen box are perpendicular to each other. The orientation is parallel to the plane containing the first direction and the height direction of the screen box, and the orientation is parallel to or at an angle to the first direction. The main cleaning assembly is disposed in the screen box and is used for screening materials. The pre-cleaning screen is located above the main cleaning assembly along the height direction of the screen box and is used for screening materials. The pre-cleaning screen is rotatably connected to the screen box at a first position and movably connected to the frame at a second position. The first position and the second position are spaced apart along the first direction.

[0022] During the material cleaning process, the eccentric adjustment component is controlled to rotate relative to the frame around the first axis. The eccentric adjustment component is connected to the screen box and rotates around the second axis. The first axis and the second axis are parallel and spaced apart, which drives the second end of the screen box to move in a directional direction and rotate relative to the frame. This makes the screen box as a whole form a compound motion of moving in a directional direction and rotating relative to the frame. Under the action of the compound motion of the screen box, the main cleaning component and the pre-cleaning screen can effectively improve the efficiency and quality of material screening.

[0023] By setting a pre-cleaning screen at a first position rotatably connected to the screen box and at a second position movably connected to the frame, with the first and second positions spaced apart along a first direction, the eccentric adjustment component can transmit power to the pre-cleaning screen through the screen box during its rotation relative to the frame around the first axis. This allows the pre-cleaning screen to move synchronously with the screen box and also rotate relative to its rotatable connection with the screen box. This further improves the efficiency and quality of screening by the pre-cleaning screen without causing additional energy consumption, thereby further increasing the feed rate and screening efficiency and quality per unit time of the cleaning device. Secondly, the pre-cleaning screen has a simple structure, which can effectively reduce the production cost of the cleaning device and the user's operating cost. Attached Figure Description

[0024] Figure 1 is a partial structural schematic diagram of a harvester provided in a specific embodiment of this utility model;

[0025] Figure 2 is a partial structural schematic diagram of the harvester provided in a specific embodiment of this utility model;

[0026] Figure 3 is a partial structural schematic diagram of the harvester provided in a specific embodiment of this utility model.

[0027] In the picture:

[0028] 100. Rack;

[0029] 1. Screen box; 11. Rotating ring; 12. First moving part; 13. Second connecting part;

[0030] 2. Eccentric adjustment component; 21. First disc; 22. Drive shaft;

[0031] 3. Main cleaning assembly; 31. Shaking plate; 32. Main cleaning screen; 33. Tail screen; 34. Finger screen;

[0032] 4. Pre-cleaning and screening;

[0033] 51. First connecting piece; 52. Hinge seat;

[0034] 61. Transmission wheel; 62. Drive wheel; 63. First transmission belt; 64. Second transmission belt; 65. Third transmission belt; 66. Transmission chain; 67. First transmission pulley; 68. Second transmission pulley; 69. Third transmission pulley; 70. Fourth transmission pulley; 71. First transmission sprocket; 72. Second transmission sprocket; 73. Third transmission sprocket; 74. Fourth transmission sprocket; 75. Second tension pulley; 76. Tensioner sprocket. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0039] This utility model provides a cleaning device, as shown in Figures 1-3. The cleaning device includes a frame 100, a screen box 1, a main cleaning assembly 3, and a pre-cleaning screen 4. The screen box 1 has an eccentric adjustment member 2 at its first end along a first direction. The eccentric adjustment member 2 is rotatably connected to the frame 100 around a first axis and rotatably connected to the screen box 1 around a second axis. The first and second axes are parallel and spaced apart. The eccentric adjustment member 2 can drive the second end of the screen box 1 to move along a directional direction and rotate relative to the frame 100. The first direction, the extension direction of the first axis, and the height direction of the screen box 1 are perpendicular to each other, and the orientation is parallel to the plane containing the first direction and the height direction of the screen box 1, and the orientation is parallel to or at an angle to the first direction. The main cleaning assembly 3 is disposed inside the screen box 1 and is used for screening materials. The pre-cleaning screen 4 is located above the main cleaning assembly 3 along the height direction of the screen box 1 and is used for screening materials. The pre-cleaning screen 4 is rotatably connected to the screen box 1 at a first position and movably connected to the frame 100 at a second position, with the first and second positions spaced apart along the first direction.

[0040] During the material cleaning process, the eccentric adjustment component 2 is controlled to rotate around the first axis relative to the frame 100. The eccentric adjustment component 2 is rotatably connected to the screen box 1 around the second axis. The first axis and the second axis are parallel and spaced apart, which drives the second end of the screen box 1 to move in a directional direction and rotate relative to the frame 100, so that the screen box 1 as a whole forms a compound motion of moving in a directional direction and rotating relative to the frame 100. Under the compound motion of the screen box 1, the main cleaning component 3 and the pre-cleaning screen 4 can effectively improve the efficiency and quality of material screening.

[0041] By setting the pre-cleaning screen 4 to be rotatably connected to the screen box 1 at the first position and movably connected to the frame 100 at the second position, with the first and second positions spaced apart along the first direction, the eccentric adjustment member 2 can transmit power to the pre-cleaning screen 4 through the screen box 1 during its rotation around the first axis relative to the frame 100. This allows the pre-cleaning screen 4 to move synchronously with the screen box 1 and to rotate relative to its rotatable connection with the screen box 1. This further improves the efficiency and quality of material screening by the pre-cleaning screen 4 without causing additional energy consumption, thereby further improving the feed rate and screening efficiency and quality per unit time of the cleaning device. Secondly, the pre-cleaning screen 4 has a simple structure, which can effectively reduce the production cost of the cleaning device and the user's operating cost.

[0042] Specifically, in Figures 1 and 2, the ab direction is the first direction; the cd direction in Figures 1 and 2 is the extension direction of the first axis, and the extension directions of the first axis, the second axis, and the second direction are all parallel; the ef direction in Figures 1 and 2 is the height direction of the sieve box 1.

[0043] Specifically, when this cleaning device is applied to a harvester, the harvester also includes a threshing assembly mounted on the frame 100, located at the top of the screen box 1 along its height direction. Further, an opening is formed at the top of the screen box 1 along its height direction, through which material output from the threshing assembly falls onto the pre-cleaning screen 4 and the main cleaning assembly 3 for screening. Further, the harvester's frame includes the frame 100. The specific structures of the frame 100 and the threshing assembly are prior art and will not be described in detail here.

[0044] In this embodiment, as shown in Figures 1-3, the top of the screen box 1 along the height direction is rectangular, i.e., the opening is rectangular. Further, in this embodiment, the first direction is parallel to the length direction of the rectangle, and the extension direction of the first axis is parallel to the width direction of the rectangle.

[0045] In this embodiment, as shown in Figures 1-3, an example is taken where the second end of the screen box 1 is the front end of the screen box 1 and the first end of the screen box 1 is the rear end of the screen box 1. That is, when the cleaning device is applied to a harvester, the second end of the screen box 1 is closer to the front end of the harvester along its own length direction relative to the first end of the screen box 1.

[0046] In this embodiment, as shown in Figures 1-3, an exemplary example is taken where the second end of the screen box 1 is located at the first position relative to the second position along the first direction. In other embodiments, the second end of the screen box 1 may also be located at the second position relative to the first position along the first direction.

[0047] Optionally, as shown in Figures 1-3, the pre-cleaning screen 4 is located above the screen box 1. Compared to the pre-cleaning screen 4 being located inside the screen box 1, the pre-cleaning screen 4 has a larger distance from the main cleaning assembly 3 along the height direction of the screen box 1. This allows for the holding of more material between the pre-cleaning screen 4 and the main cleaning assembly 3. Furthermore, the material falling onto the pre-cleaning screen 4 can be quickly and efficiently screened onto the main cleaning assembly 3 under the drive of the eccentric adjustment element 2. The material falling onto the main cleaning assembly 3 can also be quickly and efficiently screened below the main cleaning assembly 3 under the drive of the eccentric adjustment element 2, thereby further improving the feed rate per unit time, as well as the efficiency and quality of material screening in this cleaning device. As an alternative, the pre-cleaning screen 4 is located inside the screen box 1 and spaced above the main cleaning assembly 3.

[0048] Optionally, as shown in Figures 1-3, the pre-cleaning screen 4 is set at an angle to a preset plane. The plane containing the extension direction of the first direction and the first axis is the preset plane, and along the first direction, one end of the pre-cleaning screen 4 near the second end of the screen box 1 is located above the other end. This arrangement allows the pre-cleaning screen 4 to not only screen materials but also move the materials falling on it towards the side closer to the first end of the screen box 1, i.e., towards the rear end of the screen box 1, thereby further improving the efficiency and quality of screening. Specifically, in this embodiment, the tail screen 33 of the main cleaning component 3 is located at the first end of the screen box 1. The materials falling onto the tail screen 33 can be screened by the tail screen 33 and output outside the screen box 1, thereby further improving the efficiency and quality of screening. As an alternative, the pre-cleaning screen 4 is parallel to the preset plane, and the plane containing the extension direction of the first direction and the first axis is the preset plane.

[0049] In this embodiment, as shown in Figures 1-3, the pre-cleaning screen 4 is preferably located above the screen box 1; the pre-cleaning screen 4 is set at an angle to the preset plane, the plane containing the extension direction of the first direction and the first axis is the preset plane, and along the first direction, one end of the pre-cleaning screen 4 near the second end of the screen box 1 is located above the other end.

[0050] In this embodiment, the pre-cleaning screen 4 is exemplarily taken as being rectangular in shape. The length direction of the pre-cleaning screen 4 is parallel to the first direction, and the width direction of the pre-cleaning screen 4 is parallel to the extension direction of the first axis. It can be understood that the shape of the pre-cleaning screen 4 can also be adaptively adjusted according to actual working conditions.

[0051] As shown in Figures 1-3, the main cleaning assembly 3 includes at least two cleaning screens, which are sequentially distributed along a first direction. The upstream screen of any two adjacent screens can output the screened material to the downstream screen, and the material falling onto the downstreammost screen can be screened and output outside the screen box. This allows for the separation of grains from the material.

[0052] Optionally, at least two cleaning screens include a shaking plate 31, a main cleaning screen 32, and a tail screen 33. The shaking plate 31 is located at the second end of the screen box 1, the tail screen 33 is located at the first end of the screen box 1, and the main cleaning screen 32 is located between the shaking plate 31 and the tail screen 33. Material falling onto the shaking plate 31 is shaken and screened by the shaking plate 31 and then conveyed to the main cleaning screen 32. Material falling onto the main cleaning screen 32 is screened by the main cleaning screen 32 and then conveyed to the tail screen 33. Material falling onto the tail screen 33 is screened by the tail screen 33 and then output outside the screen box 1. This allows for the separation of grains from the material. Furthermore, one side of the shaking plate 31 near the second end of the screen box 1 is fixedly connected to the screen box 1, and the shaking plate 31 is driven to shake by the combined motion of the screen box 1; or, the shaking plate 31 is equipped with a shaking drive component, which can drive the shaking plate 31 to shake, so as to further improve the efficiency and quality of screening of the main cleaning component 3. The specific structure and working principle of the shaking drive component driving the shaking plate 31 to shake are existing technologies, and therefore will not be described in detail here.

[0053] Further optionally, as shown in Figures 1-3, at least two cleaning screens also include finger screens 34, which are connected to the shaking plate 31 and located at a second end of the screen box 1 away from the shaking plate 31. The finger screens 34 are positioned between the pre-cleaning screen 4 and the main cleaning screen 32 along the height direction of the screen box 1. The finger screens 34 can both screen the material and loosen it.

[0054] In this embodiment, as shown in Figures 1-3, at least two cleaning screens are exemplified, including a shaking plate 31, a finger screen 34, a main cleaning screen 32, and a tail screen 33. The shaking plate 31 is inclined, with one end of the shaking plate 31 near the second end of the screen box 1 located above the end of the shaking plate 31 near the finger screen 34. The shaking plate 31 and the main cleaning screen 32 are distributed at a first obtuse angle, with the opening of the first obtuse angle facing the top of the screen box 1, and at least one end of the main cleaning screen 32 near the shaking plate 31 located below the shaking plate 31. The main cleaning screen 32 and the tail screen 33 are distributed at a second obtuse angle, with the opening of the second obtuse angle facing the top of the screen box 1, and at least one end of the tail screen 33 near the main cleaning screen 32 located below the main cleaning screen 32.

[0055] The material falling onto the shaking plate 31 is shaken and stratified by the shaking of the plate 31, moving towards the finger screen 34. The material falling onto the finger screen 34 is shaken and loosened by the finger screen 34, and the loosened material is conveyed to the main cleaning screen 32. After passing through the main cleaning screen 32, most of the grains are screened out and fall into the screen box 1. The screened material is then conveyed by the main cleaning screen 32 to the tail screen 33 and output outside the screen box 1 after screening by the tail screen 33. Further, the material containing grains is separated when passing through the tail screen 33 and falls into the impurity auger for secondary cleaning and separation. The grains screened out by the main cleaning component 3 fall into the grain auger, which collects and conveys them to the grain silo or unloading device, etc. The impurity auger and the grain auger are both located below the screen box 1 and are connected to the bottom of the screen box 1. The specific structure and working principle of the screen box 1, the main cleaning component 3, the impurity auger and the grain auger are all existing technologies, so they will not be described in detail here.

[0056] Optionally, as shown in Figures 1-3, the orthographic projection of the pre-cleaning screen 4 along the height direction of the screen box 1 at least partially covers the main cleaning screen 32. This arrangement, compared to the pre-cleaning screen 4 only covering the shaking plate 31 along the height direction of the screen box 1, effectively increases the distance between the pre-cleaning screen 4 and the main cleaning assembly 3. This allows more material to be accommodated between the pre-cleaning screen 4 and the main cleaning assembly 3, effectively reducing the risk of material accumulation between the main cleaning screen 32 and the pre-cleaning screen 4, and further improving the screening efficiency and quality of the pre-cleaning screen 4, as well as the screening efficiency and quality of the main cleaning screen 32.

[0057] Specifically, the orthographic projection of the pre-cleaning screen 4 along the height direction of the screen box 1 covers only a portion of the main cleaning screen 32; or, the orthographic projection of the pre-cleaning screen 4 along the height direction of the screen box 1 covers the shaking plate 31 and a portion of the main cleaning screen 32 and a portion of the shaking plate 31; or, the orthographic projection of the pre-cleaning screen 4 along the height direction of the screen box 1 covers the tail screen 33 and a portion of the main cleaning screen 32; or, the orthographic projection of the pre-cleaning screen 4 along the height direction of the screen box 1 covers the main cleaning screen 32, the shaking plate 31, and the tail screen 33. As an alternative, the orthographic projection of the pre-cleaning screen 4 along the height direction of the screen box 1 covers only the shaking plate 31 or only the tail screen 33.

[0058] In this embodiment, by an exemplary arrangement along the first direction, one end of the pre-cleaning screen 4 near the second end of the screen box 1 is flush with the main cleaning screen 32, and the orthographic projection of the end of the pre-cleaning screen 4 near the first end of the screen box 1 along the height direction of the screen box 1 falls on the main cleaning screen 32.

[0059] Optionally, as shown in Figures 1-3, the cleaning device further includes a first connecting member 51. The pre-cleaning screen 4 is rotatably connected to one end of the first connecting member 51 at a second position, and the other end of the first connecting member 51 is rotatably connected to the frame 100. This allows the pre-cleaning screen 4 to be movably connected to the frame 100 at the second position, so that the power transmitted to the pre-cleaning screen 4 through the screen box 1 during the rotation of the eccentric adjusting member 2 relative to the frame 100 around the first axis can both move synchronously with the screen box 1 and rotate relative to its rotatable connection with the screen box 1. In this embodiment, the first connecting member 51 is exemplaryly set as a rod.

[0060] Alternatively, as shown in Figures 1 and 2, two first connecting members 51 are provided, with each first connecting member 51 located at one-to-one at both ends of the pre-cleaning screen 4 along the second direction, which is parallel to the extension direction of the first axis. This can improve the movement stability and reliability of the pre-cleaning screen 4; secondly, compared to the first connecting members 51 being located between the two ends of the pre-cleaning screen 4 along the second direction, it can reduce the design difficulty and assembly / disassembly difficulty.

[0061] As an alternative, the pre-cleaning screen 4 is rotatably connected to the screen box 1 at a first position; one of the frame 100 and the pre-cleaning screen 4 is provided with a second elongated hole at a second position, and the other is provided with a second moving member. One of the second moving member and the second elongated hole can move and rotate relative to the other; the length direction of the first elongated hole is parallel to the plane containing the first direction and the height direction of the screen box 1, and the length direction of the first elongated hole is parallel to or at an angle to the length direction of the screen box 1. Further, the second moving member can be a fixedly installed connecting shaft, a roller that rotates around its own central axis, or a bearing whose inner and outer rings are collinear, etc.

[0062] Optionally, as shown in Figures 1 and 2, the cleaning device further includes a hinge seat 52, which is fixedly connected to the screen box 1 and rotatably connected to the pre-cleaning screen 4 at a first position. This achieves a rotatable connection between the pre-cleaning screen 4 and the screen box 1. Further, as shown in Figures 1 and 2, two hinge seats 52 are provided, with each hinge seat 52 corresponding to one of the two ends of the pre-cleaning screen 4 along the second direction. This further improves the movement stability and reliability of the pre-cleaning screen 4; secondly, compared to placing the hinge seats 52 between the two ends of the pre-cleaning screen 4 along the second direction, it reduces design and assembly / disassembly difficulty. As an alternative, the pre-cleaning screen 4 is rotatably connected to the screen box 1 via a first rotating shaft at the first position.

[0063] In this embodiment, as shown in Figures 1-3, the preferred hinge seat 52 is fixedly connected to the screen box 1 and rotatably connected to the pre-cleaning screen 4 at the first position. The pre-cleaning screen 4 is rotatably connected to one end of the first connecting member 51 at the second position, and the other end of the first connecting member 51 is rotatably connected to the frame 100. Further, in this embodiment, the hinge seat 52 is rotatably connected to the pre-cleaning screen 4 at the first position via a second rotating shaft; the pre-cleaning screen 4 is rotatably connected to one end of the first connecting member 51 at the second position via a third rotating shaft, and the other end of the first connecting member 51 is rotatably connected to the frame 100 via a fourth rotating shaft. Further, in this embodiment, the second rotating shafts corresponding to the two hinge seats 52 are the same shaft. The two hinge seats 52 pass through the second rotating shaft along its own length direction, and the relative positions of the second rotating shaft and the two hinge seats are limited axially by limiting pins or limiting nuts. This configuration not only further enhances the motion stability and reliability of the pre-cleaning screen 4, but also facilitates the installation and removal of the pre-cleaning screen 4 from the screen box 1 and the frame 100 according to actual working conditions, and allows for the replacement of pre-cleaning screen 4 of different specifications according to actual working conditions.

[0064] Optionally, as shown in Figures 1 and 3, the eccentric adjustment component 2 includes a first disc 21, which is rotatably connected to the frame 100 about a first axis. The second axis is the central axis of the first disc 21. A rotating ring 11 is fixedly provided at the first end of the screen box 1, and the rotating ring 11 is rotatably sleeved on the outer circumference of the first disc 21. It can be understood that the first disc 21 is equivalent to the inner ring of the eccentric bearing, and the rotating ring 11 is equivalent to the outer ring of the eccentric bearing. This enables the eccentric adjustment component 2 to drive the screen box 1 as a whole to perform a combined motion of directional movement and rotation relative to the frame 100. In this embodiment, the rotating ring 11 is exemplaryly fixedly connected to the screen box 1 through a semi-circular second connecting member 13.

[0065] As an alternative, the eccentric adjustment component 2 includes a first connecting rod, one end of which is rotatably connected to the frame 100 about a first axis, and the other end of which is rotatably connected to the screen box 1 about a second axis. The second end of the screen box 1 moves along a directional path and rotates relative to the frame 100. This also enables the eccentric adjustment component 2 to drive the screen box 1 as a whole to perform a combined motion of directional movement and rotation relative to the frame 100.

[0066] Specifically, as shown in Figures 1 and 3, the eccentric adjustment component 2 further includes a drive shaft 22 rotatably connected to the frame 100 about its own central axis, and the central axis of the drive shaft 22 is the first axis. Regarding the eccentric adjustment component 2 including the first disc 21, the first disc 21 is fixedly sleeved on the drive shaft 22, and the central axis of the first disc 21 is the second central axis. Regarding the eccentric adjustment component 2 including the first connecting rod, one end of the first connecting rod is fixedly connected to the drive shaft 22 by means of fixed sleeve, integral molding, etc., and the other end of the first connecting rod is rotatably connected to the screen box 1 about the second axis.

[0067] Specifically, as shown in Figures 1-3, the cleaning device also includes a transmission wheel 61, which is fixedly sleeved on the transmission shaft 22 and is connected to the drive wheel 62. The drive wheel 62 is rotatably connected to the frame 100 around its own central axis and is connected to the output shaft of the rotation drive component. The rotation drive component can drive the drive wheel 62 to rotate around its own central axis, so that the drive wheel 62 drives the transmission wheel 61 to rotate around its own central axis.

[0068] In this embodiment, as shown in Figures 2 and 3, taking the cleaning device applied to a harvester as an example, the rotating drive component is the harvester's engine. The harvester also includes a first transmission pulley 67, a second transmission pulley 68, a third transmission pulley 69, a fourth transmission pulley 70, and a fifth transmission pulley, a first transmission sprocket 71, a second transmission sprocket 72, a third transmission sprocket 73, and a fourth transmission sprocket 74, which are rotatably connected to the frame 100 around their own central axis. The transmission pulley 61 is the fifth transmission pulley, and the drive pulley 62 is the drive pulley. The first transmission pulley 67 and the second transmission pulley 68 are coaxially fixed, the third transmission pulley 69 and the first transmission sprocket 71 are coaxially fixed, and the fourth transmission sprocket 74 and the fourth transmission pulley 70 are coaxially fixed. The first transmission belt 63 is wound around the outer periphery of the drive wheel 62 and the first transmission pulley 67; the second transmission belt 64 is wound around the outer periphery of the second transmission pulley 68 and the third transmission pulley 69; the third transmission belt 65 is wound around the outer periphery of the fourth transmission pulley 70 and the fifth transmission pulley; the transmission chain 66 is wound around the outer periphery of the first transmission sprocket 71, the second transmission sprocket 72, and the third transmission sprocket 73, and

[0069] The first drive sprocket 71, the second drive sprocket 72, and the third drive sprocket 73 all mesh with the drive chain 66 along the inner circumference of the drive chain 66, while the fourth drive sprocket 74 meshes with the drive chain 66 along the outer circumference of the drive chain 66.

[0070] The engine drives the transmission drive wheel 62 to rotate around its own central axis, which causes the first transmission belt 63 to drive the first transmission pulley 67 to rotate around its own central axis, the second transmission belt 64 to drive the third transmission pulley 69 to rotate around its own central axis, which in turn drives the first transmission sprocket 71 to rotate around its own central axis, the transmission chain 66 to drive the fourth transmission sprocket 74 to rotate around its own central axis, and the third transmission belt 65 to drive the transmission pulley 61 to rotate around its own central axis, thereby driving the transmission shaft 22 to rotate around its own central axis.

[0071] Furthermore, in this embodiment, as shown in Figures 2 and 3, the cleaning device further includes a first tensioning pulley, a second tensioning pulley 75, and a third tensioning pulley. The first tensioning pulley is used to tension the first transmission belt 63, the second tensioning pulley 75 is used to tension the second transmission belt 64, and the third tensioning pulley is used to tension the third transmission belt 65. As shown in Figures 2 and 3, the cleaning device also includes a tensioning sprocket 76, which is used to tension the transmission chain 66. This ensures that the first transmission belt 63, the second transmission belt 64, the third transmission belt 65, and the transmission chain 66 can all be driven effectively.

[0072] Furthermore, in this embodiment, the first transmission belt 63 is a V-belt, and the inner circumference of the V-belt is provided with meshing teeth. Correspondingly, the outer circumferences of the drive wheel 62, the first transmission pulley 67, and the first tension pulley also have meshing teeth. The meshing teeth on the outer circumferences of the drive wheel 62, the first transmission pulley 67, and the first tension pulley all mesh with the meshing teeth on the inner circumference of the first transmission belt 63, so as to drive the first transmission pulley 67 to transmit power. In other embodiments, the transmission assembly formed by the first transmission belt 63, the drive wheel 62, the first transmission pulley 67, and the first tension pulley can also be replaced with a chain drive assembly or a gear drive assembly, etc. Among them, the V-belt (also known as a triangular belt) is a ring-shaped transmission belt with a trapezoidal cross-section, which transmits power by the friction between the inclined surfaces on both sides and the groove wall of the pulley.

[0073] The second transmission belt 64 is a V-shaped belt, and the inner circumference of the V-shaped belt is provided with meshing teeth. Correspondingly, the outer circumferences of the second transmission pulley 68, the third transmission pulley 69, and the second tension pulley 75 also have meshing teeth. The meshing teeth on the outer circumferences of the second transmission pulley 68, the third transmission pulley 69, and the second tension pulley 75 all mesh with the meshing teeth on the inner circumference of the second transmission belt 64, so as to drive the third transmission pulley 69. In other embodiments, the transmission assembly formed by the second transmission belt 64, the second transmission pulley 68, the third transmission pulley 69, and the second tension pulley 75 can also be replaced with a chain drive assembly or a gear drive assembly, etc.

[0074] The third transmission belt 65 is a V-shaped belt, and the inner circumference of the V-shaped belt is provided with meshing teeth. Correspondingly, the outer circumferences of the fourth transmission pulley 70, the transmission pulley 61, and the third tension pulley are also provided with meshing teeth. The meshing teeth on the outer circumferences of the fourth transmission pulley 70, the transmission pulley 61, and the third tension pulley all mesh with the meshing teeth on the inner circumference of the third transmission belt 65, so as to drive the third transmission pulley 69. In other embodiments, the transmission assembly formed by the third transmission belt 65, the fourth transmission pulley 70, the transmission pulley 61, and the third tension pulley can be replaced with a chain drive assembly or a gear drive assembly, etc.

[0075] In other embodiments, the chain drive mechanism formed by the drive chain 66, the first drive sprocket 71, the second drive sprocket 72, the third drive sprocket 73 and the tension sprocket 76 may be replaced with a belt drive assembly or a gear drive assembly.

[0076] Furthermore, in this embodiment, there are two drive wheels 61, which are located on opposite sides of the screen box 1 along the second direction. There are also two eccentric adjustment members 2, located between the two drive wheels 61. Compared to using only one drive wheel 61 and one eccentric adjustment member 2, this arrangement further improves the stability and reliability of the composite motion of driving the screen box 1 to perform directional movement and rotation relative to the frame 100.

[0077] Furthermore, in this embodiment, when the cleaning device is applied to a harvester, the second drive sprocket 72 is also used to drive the grain auger of the harvester, and the third drive sprocket 73 is also used to drive the waste auger of the harvester.

[0078] As shown in Figures 2 and 3, one of the second end of the screen box 1 and the frame 100 is provided with a first elongated hole extending in a specific direction, and the other is provided with a first moving member 12. One of the first moving member 12 and the first elongated hole can move and rotate relative to the other. This allows the eccentric adjustment member 2 to drive the second end of the screen box 1 to move in a specific direction and rotate relative to the frame 100. In this embodiment, as shown in Figures 2 and 3, the second end of the screen box 1 is provided with a first moving member 12, and the frame 100 is provided with a first elongated hole extending in a specific direction. The first moving member 12 can move and rotate relative to the first elongated hole. In other embodiments, the second end of the screen box 1 is provided with a first elongated hole extending in a specific direction, and the frame 100 is provided with a first moving member 12. The first elongated hole can move and rotate relative to the first moving member 12.

[0079] Furthermore, two first elongated holes and two first moving parts 12 are provided, with each pair of first elongated holes and first moving parts 12 corresponding to one another; the two first moving parts 12 are spaced apart on both sides of the screen box 1 in the width direction. This further improves the stability and reliability of the composite motion of driving the screen box 1 as a whole to move along the directional direction and rotate relative to the frame 100. Furthermore, the first moving part 12 can be a fixedly installed connecting shaft, a roller rotating around its own central axis, or a bearing whose inner and outer rings have collinear central axes, etc.

[0080] As an alternative, the second end of the screen box 1 can be rotatably connected to one end of the second connecting rod, and the other end of the second connecting rod can be rotatably connected to the frame 100. This also allows the second end of the screen box 1 to slide along a directional path and rotate relative to the frame 100.

[0081] This utility model also provides a harvester, including the aforementioned cleaning device. By adopting the aforementioned cleaning device, the feeding amount per unit time of the harvester, as well as the efficiency and quality of material screening, can be effectively improved, thereby effectively reducing the production cost of the harvester and the user's operating cost.

[0082] Specifically, the harvester also includes a threshing assembly mounted on the frame 100, located at the top of the screen box 1 along its height. After threshing the material, the threshing assembly outputs the material to the pre-cleaning screen 4 and the main cleaning assembly 3 for screening.

[0083] Specifically, the harvester also includes a waste auger and a grain auger mounted on the frame 100. Both the waste auger and the grain auger are located below and connected to the screen box 1. Material containing grain is separated when it passes through the tail screen 33 and falls into the waste auger for secondary cleaning and separation. The grains screened out by the main cleaning component 3 fall into the grain auger, which collects and transports them to the grain bin or unloading device, etc.

[0084] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A cleaning device, comprising a frame (100), characterized in that, Also includes: A sieve box (1) is provided with an eccentric adjustment member (2) at its first end along a first direction. The eccentric adjustment member (2) is rotatably connected to the frame (100) about a first axis and rotatably connected to the sieve box (1) about a second axis. The first axis and the second axis are parallel and spaced apart. The eccentric adjustment member (2) can drive the second end of the sieve box (1) to move along a directional direction and rotate relative to the frame (100). The first direction, the extension direction of the first axis, and the height direction of the sieve box (1) are perpendicular to each other. The directional direction is parallel to the first direction and the height direction of the sieve box (1). The plane in which the height direction of the screen box (1) is located, and the orientation is parallel to or at an angle to the first direction; the main cleaning component (3) is disposed in the screen box (1) and is used for screening materials; the pre-cleaning screen (4) is located above the main cleaning component (3) along the height direction of the screen box (1) and is used for screening materials; the pre-cleaning screen (4) is rotatably connected to the screen box (1) at a first position and movably connected to the frame (100) at a second position, and the first position and the second position are spaced apart along the first direction.

2. The cleaning device according to claim 1, characterized in that: The pre-cleaning screen (4) is located above the screen box (1); and / or, the pre-cleaning screen (4) is set at an angle to a preset plane, the plane containing the first direction and the extension direction of the first axis is the preset plane, and along the first direction, one end of the pre-cleaning screen (4) near the second end of the screen box (1) is located above the other end.

3. The cleaning device according to claim 1, characterized in that, The cleaning device further includes a first connector (51), the pre-cleaning screen (4) is rotatably connected to one end of the first connector (51) at the second position, and the other end of the first connector (51) is rotatably connected to the frame (100).

4. The cleaning device according to claim 3, characterized in that, There are two first connectors (51), and the two first connectors (51) are located at the two ends of the pre-cleaning screen (4) along the second direction, which is parallel to the extension direction of the first axis.

5. The cleaning device according to claim 1, characterized in that, The cleaning device also includes a hinge seat (52), which is fixedly connected to the screen box (1) and rotatably connected to the pre-cleaning screen (4) at the first position.

6. The cleaning apparatus according to any one of claims 1-5, characterized in that, The main cleaning component (3) includes at least two cleaning screens, which are distributed sequentially along the first direction. The upstream screen of any two adjacent screens can output the screened material to the downstream screen. The material on the downstream screen can be screened and output to the outside of the screen box (1).

7. The cleaning device according to claim 6, characterized in that, At least two of the cleaning screens include a shaking plate (31), a main cleaning screen (32), and a tail screen (33). The shaking plate (31) is disposed at the second end of the screen box (1), the tail screen (33) is disposed at the first end of the screen box (1), and the main cleaning screen (32) is located between the shaking plate (31) and the tail screen (33). The pre-cleaning screen (4) at least partially covers the main cleaning screen (32) by its orthographic projection along the height direction of the screen box (1).

8. The cleaning apparatus according to any one of claims 1-5, characterized in that, The eccentric adjustment component (2) includes a first disc (21), which is rotatably connected to the frame (100) around the first axis. The second axis is the central axis of the first disc (21). A rotating ring (11) is fixedly provided at the first end of the sieve box (1), and the rotating ring (11) is rotatably sleeved on the outer periphery of the first disc (21).

9. The cleaning apparatus according to any one of claims 1-5, characterized in that, The second end of the sieve box (1) and one of the frame (100) are provided with a first elongated hole extending along the direction, and the other is provided with a first moving member (12), one of the first moving member (12) and the first elongated hole being able to move and rotate relative to the other.

10. A harvester, characterized in that, Includes the cleaning apparatus according to any one of claims 1-9.

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