Screening device for harvester and harvester

Abstract

The utility model relates to the technical field of harvesters, and provides a material screening device for a harvester, which comprises a material screening barrel which is rotatably arranged on the harvester and can screen materials conveyed by the harvester; the guide conveying part is used for receiving and conveying materials screened by the screening barrel; the driving part is used for driving the screening barrel and the guide conveying part to operate; and the transmission mechanism driving piece is in transmission connection with the screening barrel and the guide conveying piece through a transmission mechanism. The utility model further provides a harvester which comprises a machine frame and the material screening device for the harvester, and the material screening barrel is arranged on the machine frame in a rotating mode. By means of the technical scheme, the technical problem that in the prior art, a transmission mechanism of a harvester is mostly independently controlled by a plurality of driving pieces, and the power transmission efficiency is low is solved.

Description

Technical Field

[0001] This utility model relates to the field of harvester technology, specifically to a material screening device for a harvester and a harvester. Background Technology

[0002] In modern agricultural production, harvesting and screening equipment is a common integrated device for harvesting, screening, and feeding. Traditional harvesting and screening equipment often employs independent drive structures for the screening and feeding devices. These structures have numerous transmission components and drive parts, occupying a significant amount of space and resulting in bulky equipment. This makes it difficult to operate the complex drive structure flexibly in the confined working environment of fields, and also increases the difficulty of equipment maintenance. The coordinated operation of multiple independent drive structures requires precise control to ensure the smooth operation of each component. Furthermore, individual drive of multiple drive parts leads to low power transmission efficiency and high energy consumption, significantly limiting the working efficiency and performance improvement of harvesting and screening equipment. Utility Model Content

[0003] To overcome the above-mentioned defects, embodiments of this utility model provide a screening device for a harvester and a harvester, which solves the technical problem of low power transmission efficiency in the transmission mechanism of harvesters, which is often controlled independently by multiple drive components.

[0004] According to one aspect, at least one embodiment of the present invention provides a screening device for a harvester, comprising:

[0005] A screening cylinder, which is rotatably mounted on a harvester and is capable of screening the materials conveyed by the harvester;

[0006] A guide conveyor for receiving and conveying the material screened by the screen cylinder;

[0007] The driving component is used to drive the screen cylinder and the guide conveyor to operate;

[0008] The transmission mechanism connects the drive component to the screen cylinder and the guide conveyor via the transmission mechanism.

[0009] For example, in at least one embodiment of the sieve device for a harvester provided by this utility model, the transmission mechanism includes:

[0010] A drive wheel is located between the screen cylinder and the output part of the drive component, and the drive component drives the screen cylinder to rotate through the drive wheel.

[0011] For example, in at least one embodiment of the sieve device for a harvester provided by this utility model, the transmission mechanism further includes:

[0012] The first transmission wheel is connected to the drive wheel and rotates under the drive of the drive wheel;

[0013] The second drive wheel is connected to the guide conveyor and is used to drive the guide conveyor to rotate.

[0014] A transmission component is provided, which is arranged around the drive wheel, the first transmission wheel and the second transmission wheel, wherein the first transmission wheel drives the second transmission wheel to rotate through the transmission component.

[0015] For example, the screening device for a harvester provided in at least one embodiment of this utility model further includes:

[0016] A support wheel is rotatably mounted on the harvester. The support wheel abuts against the outer wall of the screen cylinder and is used to cooperate with the drive wheel to support the screen cylinder.

[0017] For example, in at least one embodiment of the present invention, the number of the sieving device for a harvester is three, including one first sieving wheel and two second sieving wheels. The first sieving wheel cooperates with the drive wheel to support one end of the sieving cylinder, and the two second sieving wheels are used to support the other end of the sieving cylinder.

[0018] For example, in at least one embodiment of the present invention, the screening device for a harvester further includes a third transmission wheel, which is connected to the first support wheel and is used to drive the first support wheel to rotate. The transmission component is also used to rotate the third transmission wheel.

[0019] For example, in at least one embodiment of the sieve device for a harvester provided by this utility model, the transmission mechanism further includes:

[0020] The tensioning wheel is rotatably disposed between any two of the first transmission wheel, the two second transmission wheels, and the third transmission wheel to tension the transmission component.

[0021] For example, in at least one embodiment of the present invention, the number of the guide conveying components is two. The two guide conveying components are symmetrically distributed along the rotation axis of the screen cylinder and one end of each component is located below the screen cylinder. A material collection port is formed between the downward ends of the two guide conveying components, and both guide conveying components convey material toward the material collection port.

[0022] For example, in at least one embodiment of the harvester screening device provided by this utility model, the guiding conveyor is a conveyor belt.

[0023] According to another aspect, at least one embodiment of the present invention provides a harvester, including a frame and the above-described harvester screening device, wherein the screening cylinder is rotatably disposed on the frame.

[0024] The beneficial effects of the embodiments of this utility model are as follows:

[0025] In this invention, the driving component and power are synchronously delivered to the screening cylinder and the guiding conveyor through a transmission mechanism. The rotation of the screening cylinder and the conveying of the guiding conveyor are achieved through the same driving component. Compared with the traditional independent driving structure, this reduces the number of components such as the drive motor and reducer, improves the integration of transmission mechanism components, and reduces the overall size of the equipment, making it more suitable for narrow field working environments. The single power source reduces the complexity of the control system, eliminating the need to coordinate the speed and start / stop of multiple driving components, improving power transmission efficiency and significantly reducing energy consumption. The symmetrical arrangement of support and transmission components ensures uniform force distribution on the equipment, enhances operational stability, and requires only checking a single transmission path during maintenance, reducing fault points and lowering maintenance costs. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a screening device for a harvester in one embodiment of the present invention;

[0028] Figure 2 for Figure 1 The schematic diagram of the transmission mechanism in the embodiment is shown.

[0029] In the diagram: 100, screen cylinder; 120, drive component; 200, guide conveyor component; 201, material collection port; 101, drive wheel; 300, support wheel; 110, first transmission wheel; 210, second transmission wheel; 410, transmission component; 310, third transmission wheel; 510, tension wheel. Detailed Implementation

[0030] 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 its scope.

[0031] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0032] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection 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.

[0033] 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.

[0034] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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.

[0035] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] like Figures 1-2The diagram illustrates a harvester screening device according to an embodiment of the present invention. The harvester screening device includes a screening cylinder 100 and a guide conveyor 200. The screening cylinder 100 is rotatably mounted on the harvester, and its axis is preferably arranged horizontally, but a certain angular offset is permissible due to assembly precision and process variations. The inlet of the screening cylinder 100 can be located at the center of its end, ensuring continuous communication between the inlet and the outlet of the harvester during rotation, thus enabling continuous screening of the material conveyed by the harvester. The harvester's conveying mechanism transports the material to be screened to the inlet of the screening cylinder 100. The cylinder wall of the screening cylinder 100 is provided with screen holes, the diameter of which is designed according to the specifications of the material to be screened. When the screening cylinder 100 rotates, the material tumbles inside the cylinder; material conforming to the screen hole size passes through the screen holes and falls, while material not conforming to the size can be discharged from the outlet at the other end of the screening cylinder 100. Alternatively, the material can be temporarily left in the screening cylinder 100 and discharged after screening is completed.

[0037] One end of the guide conveyor 200 extends inclined downwards towards the screen cylinder 100. Its specific structure can be a plate-like structure or a circulating conveyor belt structure. Its upper end face near the screen cylinder 100 is an inclined guide surface. The guide conveyor 200 is mounted on the harvester frame via a bracket. When it is a plate-like structure, its inclination angle is sufficient to allow material falling from the screen cylinder 100 onto the guide conveyor 200 to slide down the upper end face due to gravity. Different types of materials require different inclination angles. When the guide conveyor 200 is a conveyor belt, the material falling onto the upper end face of the guide conveyor 200 can move along the conveying path of the guide conveyor 200, thus transporting the screened material from the screen cylinder 100 to subsequent processing mechanisms, such as collection boxes or further processing devices. Therefore, the inclination angle is not required. The purpose of the guide conveyor 200 being inclined below the screen cylinder 100 is to block the material screened in the screen cylinder 100 and guide it to a unified position for collection, so as to facilitate subsequent processing of the material.

[0038] The screening cylinder 100 is rotatably mounted on the harvester, and its rotation enables material screening. This structure utilizes the rotational motion of the screening cylinder 100 to ensure full contact between the material and the screen openings, improving screening efficiency. The guide conveyor 200 extends inclined downwards from one end of the screening cylinder 100, allowing it to guide the screened material promptly. The guide conveyor 200 relies on its inclined design and the material's own gravity for material transport, reducing reliance on complex drive structures and making the entire device more compact and space-saving, facilitating flexible operation in confined field environments. Simultaneously, the reduced power source and transmission components lower the difficulty and cost of maintenance. Furthermore, the drive unit 120, through a transmission mechanism, can simultaneously drive both the screening cylinder 100 and the guide conveyor 200. This unified power transmission method improves power transmission efficiency, reduces energy consumption, and ultimately enhances the working efficiency and performance of the harvesting and screening equipment. If the characteristics of the harvested material limit its ability to fall naturally by gravity, the guide conveyor 200 can be made into a conveyor belt to transport the screened material to a unified location for processing, thus making it more adaptable.

[0039] Two guide conveyors 200 are symmetrically arranged along the rotation axis of the screen cylinder 100, with their inclined extension ends both located below the screen cylinder 100, and their conveying surfaces inclined towards the axis of the screen cylinder 100. Each guide conveyor 200 is a conveyor belt structure, including a drive roller, a driven roller, and an annular conveyor belt wound around both. The drive shaft of the drive roller is arranged horizontally and mounted via a bearing seat. The lower ends of the two conveyor belts converge below the screen cylinder 100 to form a material collection port 201, which connects to the material collection device of the harvester or the input port of the next processing step. The material screened by the screen cylinder 100 falls onto the two conveyor belts and is conveyed to the material collection port 201 by the movement and inclination angle of the conveyor belts. Through the design of the screen cylinder 100 and the two guide conveyors 200, the functions of material screening and collection conveying are realized, and the overall structure is more compact. The design of two symmetrically distributed guide conveyors 200, in conjunction with the material collection port 201, enables the two guide conveyors to synchronously transport materials to the center, avoiding the formation of a blind zone below the screen cylinder 100 by a single conveyor, and improving material collection efficiency.

[0040] Both the drive wheel 101 and the support wheels 300 are rotatably mounted on the harvester frame. There are three support wheels 300: one first support wheel and two second support wheels. The first support wheel cooperates with the drive wheel 101 to support one end of the screen cylinder 100, and the two second support wheels cooperate to support the other end of the screen cylinder 100. The drive wheel 101 and the three support wheels 300 work together to provide stable support for the rotation of the screen cylinder 100. The drive wheel 101 is connected to the drive component 120 via a transmission mechanism, and its outer circumferential surface is provided with an anti-slip rubber layer to increase friction with the screen cylinder 100. The drive shaft of the support wheel 300 is mounted on the frame, and its outer circumferential surface is a smooth metal surface, serving only to support the screen cylinder 100. When the drive wheel 101 rotates, friction causes the screen cylinder 100 to rotate around its own axis, and the support wheels 300 roll synchronously to reduce radial sway during the rotation of the screen cylinder 100. The drive wheel 101 and the support wheel 300 respectively undertake the functions of power transmission and support. They are symmetrically arranged on both sides below the screen cylinder 100 to form a stable multi-point support, reduce the radial offset when the screen cylinder 100 rotates, and reduce the wear between the drive wheel 101 and the screen cylinder 100. The drive wheel 101 drives the screen cylinder 100 to rotate through friction, and the transmission process is smooth, avoiding the impact load that may be generated by rigid connection.

[0041] like Figure 2As shown, this illustrates a transmission mechanism in another embodiment of the present invention. The transmission mechanism includes a first transmission wheel 110 mounted on the drive wheel 101, a second transmission wheel 210 mounted on each guide conveyor 200, and a third transmission wheel 310 mounted on the support wheel 300. The transmission member 410 can be an annular belt, a toothed belt, or a chain. The first transmission wheel 110, the second transmission wheel 210, and the third transmission wheel 310 adopt a structure that cooperates with the transmission member 410. The transmission member 410 forms a closed transmission path around the first transmission wheel 110, the two second transmission wheels 210, and the third transmission wheel 310: the transmission member 410 first exits from the first transmission wheel 110, passes under the first second transmission wheel 210 in sequence, continues to pass over the second second transmission wheel 210, and then returns to the first transmission wheel 110 via the third transmission wheel 310, forming a tensioned closed loop. The tension wheel 510 is mounted on the frame via an adjustable bracket, positioned between any two drive wheels (e.g., between the third drive wheel 310 and the second drive wheel 210 near the collection port). The tension of the transmission component 410 is changed by adjusting the height of the bracket. The power of the drive component 120 is synchronously transmitted to the guide conveyor 200 and the screen cylinder 100 via the transmission mechanism. This eliminates the need for independent power sources for the screen cylinder 100 and the two guide conveyors 200, reducing the number of drive components 120. Through the cooperation of multiple drive wheels and transmission components 410, a single power source drives the screen cylinder 100 and the two guide conveyors 200 to work synchronously, completing the screening and conveying of materials and improving power source utilization. The transmission mechanism drives the screen cylinder 100 and the guide conveyor 200 synchronously via a single power source. The cooperation of the first drive wheel 110, the second drive wheel 210, the third drive wheel 310, and the tension wheel 510 forms a closed-loop tension system for the transmission component 410.

[0042] Specifically, the first transmission wheel 110 can be coaxially arranged with the drive wheel 101, directly transmitting power from the drive wheel 101 to the transmission component 410, avoiding secondary power conversion losses. The two second transmission wheels 210 correspond to the drive rollers of the conveyor belts on both sides, and the winding arrangement of the transmission component 410 ensures that the two conveyor belts rotate in the same direction and face the collection port, achieving synchronous material collection. The third transmission wheel 310 is coaxial with the support wheel 300, supporting the screen cylinder 100 while participating in power transmission through the transmission component 410, giving the drive shaft of the support wheel 300 both support and transmission functions, reducing the need for independent drive shafts. The tension wheel 510 can adjust the tension of the transmission component 410, preventing it from loosening due to prolonged operation, ensuring synchronized rotation speeds of all components, and solving the problem of coordinated control in multi-drive structures. The design of the winding direction of the transmission component 410 in the transmission mechanism replaces the complex control methods of multiple power sources, reducing the wiring required for multiple power sources and improving the reliability of the entire harvesting equipment. Furthermore, the transmission mechanism is more convenient for inspection and maintenance compared to complex control circuits.

[0043] The above structure unifies the power source for the rotation of the screening cylinder 100 and the conveying of the guide conveyor 200 through the transmission mechanism and outputs it from the drive component 120. Compared with the traditional independent drive structure, it reduces the number of components such as drive motors and reducers, improves the integration of transmission mechanism components, reduces the overall size of the equipment, and is more suitable for narrow field working environments. The single power source reduces the complexity of the control system, eliminates the need to coordinate the speed and start / stop of multiple drive components 120, improves power transmission efficiency, and significantly reduces energy consumption. The symmetrical arrangement of support and transmission components ensures uniform force distribution on the equipment, enhances operational stability, and only requires checking a single transmission path during maintenance, reducing failure points and lowering maintenance costs.

[0044] This utility model also proposes a harvester, which includes a frame (not shown in the figure) and the above-mentioned harvester screening device, wherein the screening cylinder 100 is rotatably mounted on the frame. The transmission mechanism in the screening device synchronously transmits the power of the drive component 120 to the screening cylinder 100 and the guide conveyor component 200, reducing the number of power sources in the harvester and improving the power transmission efficiency of the harvester.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A screening device for a harvester, characterized in that, include: Screening cylinder (100), the screening cylinder (100) is rotatably mounted on the harvester and is capable of screening the material conveyed by the harvester; A guide conveyor (200) is used to receive and convey the material screened by the screen cylinder (100); A drive unit (120) is used to drive the screen cylinder (100) and the guide conveyor (200) to operate; The transmission mechanism, wherein the driving component (120) is connected to the screen cylinder (100) and the guide conveyor (200) through the transmission mechanism; The transmission mechanism includes: A drive wheel (101) is located between the screen cylinder (100) and the output part of the drive member. The drive member (120) drives the screen cylinder (100) to rotate through the drive wheel (101). The first transmission wheel (110) is connected to the drive wheel (101) and rotates under the drive of the drive wheel; The second transmission wheel (210) is connected to the guide conveyor (200) and is used to drive the guide conveyor to rotate; A transmission component (410) is arranged around the drive wheel (101), the first transmission wheel (110) and the second transmission wheel (210), wherein the first transmission wheel (110) drives the second transmission wheel (210) to rotate through the transmission component (410); Also includes: A support wheel (300) is rotatably mounted on the harvester. The support wheel (300) abuts against the outer wall of the screen cylinder (100) and is used to cooperate with the drive wheel (101) to support the screen cylinder (100). The number of support wheels (300) is 3, including 1 first support wheel and 2 second support wheels. The first support wheel cooperates with the drive wheel (101) to support one end of the screen cylinder (100), and the 2 second support wheels are used to support the other end of the screen cylinder (100). The third transmission wheel (310) is connected to the first support wheel and is used to drive the first support wheel to rotate. The transmission component (410) is also used to rotate the third transmission wheel (310).

2. The screening device for a harvester according to claim 1, characterized in that, The transmission mechanism also includes: Tensioner (510) is used to rotate between any two of the first drive wheel (110), the two second drive wheels (210) and the third drive wheel (310) to tension the drive member (410).

3. The screening device for a harvester according to any one of claims 1 to 2, characterized in that, There are two guide conveyors (200). The two guide conveyors (200) are symmetrically distributed along the rotation axis of the screen cylinder (100) and one end of each guide conveyor (200) is located below the screen cylinder (100). A material collection port (201) is formed between the downward ends of the two guide conveyors (200). Both guide conveyors (200) convey materials toward the material collection port (201).

4. The screening device for a harvester according to claim 1, characterized in that, The guide conveyor (200) is a conveyor belt.

5. A harvester, characterized in that, It includes a frame and a screening device for a harvester as described in any one of claims 1 to 4, wherein the screening cylinder (100) is rotatably mounted on the frame.

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