Concave plate floating adjusting mechanism with anti-blocking function and threshing device

Abstract

The utility model relates to the field of combine harvesters, and discloses a concave plate floating adjusting mechanism with an anti-blocking function and a threshing device. The concave plate floating adjusting mechanism comprises a first concave plate arranged on one side of a first roller; the connecting rod assembly can adjust the gap between the first concave plate and the first roller and is provided with a main swing arm; the telescopic cylinder is provided with a telescopic piston rod, and the piston rod is connected with the head end of the main swing arm; the elastic element is provided with an execution end capable of generating elastic force, and the execution end is connected with the head end of the main swing arm. The threshing device adopts the concave plate floating adjusting mechanism. According to the threshing device, the acting force of the telescopic cylinder and the elastic element on the main swing arm is balanced, the first concave plate is in a floating state, the first concave plate can automatically increase the concave plate gap when materials pass abnormally, the original concave plate gap can be automatically recovered after the materials pass abnormally, and then the problem that the threshing device is prone to being blocked by the materials is solved; and the working stability and reliability of the threshing device are further improved.

Description

Technical Field

[0001] The present application belongs to the field of combine harvesters, and specifically relates to a concave plate floating adjustment mechanism and a threshing device with an anti-blocking function. Background Art

[0002] A combine harvester is a machine that harvests grain directly from the field, completing the entire process of harvesting, threshing, separating the stems, and removing debris. The threshing mechanism in a combine harvester primarily consists of a threshing drum, concave plates, and a concave plate gap adjustment mechanism. During operation, material passes through the gap formed by the threshing drum and concave plates, where it is threshed by the striking and brushing forces of the threshing elements. The concave plate gap adjustment mechanism ensures timely adjustment of the working gap between the threshing drum and concave plates based on operating conditions such as material type, feed rate, and moisture content to achieve optimal threshing performance.

[0003] For example, patent CN106489447A describes a concave plate gap adjustment mechanism. When adjusting the concave plate gap, if the piston rod of the adjustment cylinder extends outward, the main, intermediate, and auxiliary pull rods, acting under the action of the main swing lever and connecting rod, simultaneously operate to pull the concave plate closer to the threshing drum, thereby simultaneously reducing the concave plate gap and achieving a consistent and ideal concave plate gap. Conversely, if the piston rod of the adjustment cylinder retracts inward, the concave plate gap increases.

[0004] However, when the material is damp or overgrown with weeds, it can easily become clogged in the gap between the threshing drum and the concave plate, increasing the threshing load, overloading the engine, and causing poor threshing performance, or even causing the combine to malfunction. Once a blockage occurs, the machine must be stopped for repairs and adjustments, severely impacting operational efficiency. Utility Model Content

[0005] The purpose of this application is to provide a concave plate floating adjustment mechanism and a threshing device with an anti-blocking function, which is used to solve the problem that the threshing device is prone to material blockage, achieve the effect of adaptive adjustment and anti-blocking of the gap between the drum and the concave plate, and further improve the stability and reliability of the threshing device.

[0006] In order to achieve the above objectives, the present application provides, in a first aspect, a concave plate floating adjustment mechanism with an anti-blocking function, comprising:

[0007] a first concave plate, disposed on one side of the first roller;

[0008] a connecting rod assembly capable of adjusting the gap between the first concave plate and the first roller and provided with a main swing arm;

[0009] A telescopic cylinder, provided with a piston rod capable of telescopic movement, wherein the piston rod is connected to the head end of the main swing arm;

[0010] The elastic element is provided with an execution end capable of generating elastic force, and the execution end is connected to the head end of the main swing arm.

[0011] In some embodiments, the connecting rod assembly includes:

[0012] Main swing arm, the middle part of which is hinged to the frame;

[0013] a main connecting rod, hingedly connecting the tail end of the main swing arm and the tail end of the first concave plate;

[0014] a slider, disposed in the slide groove of the frame and hinged to the head of the first concave plate;

[0015] A secondary swing arm, spaced apart on one side of the main swing arm and hinged to the frame at its middle portion;

[0016] A secondary connecting rod, hingedly connecting the tail end of the secondary swing arm and the slider;

[0017] The main and auxiliary connecting rods are hingedly connected to the middle portion of the main swing arm and the head end of the auxiliary swing arm.

[0018] In some embodiments, the primary and secondary connecting rods include:

[0019] An adjusting nut having a certain length;

[0020] An adjusting screw, one end of which is provided with a thread and two adjusting screws are screwed into the two ends of the adjusting nut respectively;

[0021] The locking nut fixes the screwed-in position of the adjusting screw in the adjusting nut.

[0022] In some embodiments, the threads at both ends of the adjusting nut are opposite, the threads of the two adjusting screws are opposite, and the threads of the two locking nuts are opposite.

[0023] In some embodiments, a vent hole is provided on the side wall of the adjusting nut.

[0024] In some embodiments, a second roller is arranged on one side of the first roller, the concave plate floating adjustment mechanism further includes a second concave plate arranged on one side of the second roller, the tail of the second concave plate is hinged to the frame, and the connecting rod assembly further includes a concave plate connecting rod hingedly connecting the tail of the first concave plate and the head of the second concave plate.

[0025] In some embodiments, an extension plate is provided at the tail of the first concave plate, the extension plate extends toward the second roller and turns concave, and the bottom of the extension plate is hinged to the head of the second concave plate through the concave plate connecting rod.

[0026] In some embodiments, the telescopic cylinder and the elastic element are arranged on opposite sides of the main swing arm, and the piston rod and the actuator end are simultaneously hinged to the head end of the main swing arm.

[0027] In some embodiments, the elastic element is one of an oil-gas spring, a gas spring, a compression spring, and an air spring.

[0028] In some embodiments, the telescopic cylinder is one of an oil cylinder, a pneumatic cylinder, and an electric cylinder.

[0029] A second aspect of the present application provides a threshing device with an anti-blocking function, comprising a drum and the above-mentioned concave plate floating adjustment mechanism arranged on the outside of the drum.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] The concave plate floating adjustment mechanism of the present application balances the force exerted on the main swing arm by the telescopic cylinder and the elastic element, so that the first concave plate is in a floating state. The first concave plate can automatically increase the concave plate gap under the additional force generated when the material passes abnormally, so that the material passes smoothly, and automatically restore the original concave plate gap after the material passes abnormally, thereby solving the problem that the threshing device is prone to material blockage, achieving the effect of adaptive adjustment and anti-blocking of the gap between the drum and the concave plate, and further improving the stability and reliability of the threshing device.

[0032] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without inventive work. In the drawings:

[0034] Figure 1 This is a structural diagram of the concave plate floating adjustment mechanism according to a specific embodiment of the present application.

[0035] Figure 2 This is a structural diagram of the main and auxiliary connecting rods of a specific implementation method of this application.

[0036] Explanation of the accompanying drawings: first concave plate 11, extension plate 111, second concave plate 12, main swing arm 21, main connecting rod 22, slider 23, auxiliary swing arm 24, auxiliary connecting rod 25, main and auxiliary connecting rods 26, adjusting nut 261, adjusting screw 262, locking nut 263, vent 264, concave plate connecting rod 27, telescopic cylinder 3, elastic element 4, first roller 51, second roller 52. DETAILED DESCRIPTION

[0037] The following describes the specific embodiments of the present application in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application and are not intended to limit the present application.

[0038] like Figure 1 As shown, a concave plate floating adjustment mechanism with anti-blocking function includes:

[0039] The first concave plate 11 is provided on one side of the first roller 51;

[0040] A connecting rod assembly capable of adjusting the gap between the first concave plate 11 and the first roller 51 and provided with a main swing arm 21;

[0041] The telescopic cylinder 3 is provided with a piston rod capable of telescopic movement, and the piston rod is connected to the head end of the main swing arm 21;

[0042] The elastic element 4 is provided with an actuator end capable of generating elastic force, and the actuator end is connected to the head end of the main swing arm 21 .

[0043] In this application, a gap is formed between the first concave plate 11 and the first roller 51 for material to pass through, referred to as the concave plate gap, for threshing. The connecting rod assembly includes a main swing arm 21 and various connecting rods. When the main swing arm 21 rotates, the connecting rods cooperate to move the first concave plate 11 closer to or farther from the first roller 51, thereby adjusting the concave plate gap. When the telescopic cylinder 3 is closed, the main swing arm 21 rotates forward to the positive limit position under the elastic force of the actuator end of the elastic element 4, bringing the first concave plate 11 closer to the first roller 51 and locating the minimum concave plate gap. When the telescopic cylinder 3 is in operation, the piston rod extends or retracts against the elastic force of the actuator end, driving the main swing arm 21 to rotate in the opposite direction, moving the first concave plate 11 away from the first roller 51 and increasing the concave plate gap. When the piston rod is fully extended or fully retracted, the main swing arm 21 rotates in the opposite direction to the negative limit position, locating the first concave plate 11 at the maximum concave plate gap. Controlling the position of the piston rod of the telescopic cylinder 3 controls the concave plate gap. After the concave plate gap is adjusted, the first concave plate 11 is in a floating state due to the balance of forces exerted by the telescopic cylinder 3 and the elastic element 4. During threshing operation, if material is fed abnormally, the material will exert additional force on the first concave plate 11. This additional force further overcomes the elastic force of the elastic element 4, pushing the first concave plate 11 away from the first roller 51, temporarily increasing the concave plate gap, allowing material to pass smoothly through the concave plate gap and preventing blockage. After normal material feeding resumes, the first concave plate 11 loses the additional force and immediately restores the original concave plate gap. This achieves adaptive adjustment of the gap between the first roller 51 and the first concave plate 11 and prevents blockage, solving the problem of material blockage in the threshing device and further improving the stability and reliability of the threshing device.

[0044] Specifically, the telescopic cylinder 3 and the elastic element 4 are arranged on both sides of the main swing arm 21 facing each other, and the piston rod and the actuator end are hinged to the head end of the main swing arm 21 at the same time.

[0045] Specifically, the elastic element 4 is one of an oil-gas spring, a gas spring, a compression spring, and an air spring.

[0046] Specifically, the telescopic cylinder 3 is one of an oil cylinder, a pneumatic cylinder, or an electric cylinder. When the telescopic cylinder 3 is an oil cylinder or a pneumatic cylinder, the position of the piston rod is controlled by an external hydraulic circuit or pneumatic circuit. When the telescopic cylinder 3 is an electric cylinder, the position of the piston rod is controlled by a sensor circuit such as an encoder, thereby achieving control over the size of the concave plate gap.

[0047] Specifically, the connecting rod assembly includes:

[0048] The main swing arm 21 is hinged to the frame at the middle;

[0049] A main connecting rod 22 is hingedly connected between the tail end of the main swing arm 21 and the tail end of the first concave plate 11;

[0050] The slider 23 is arranged in the slide groove of the frame and is hinged to the head of the first concave plate 11;

[0051] Auxiliary swing arm 24, spaced apart on one side of the main swing arm 21 and hinged to the frame at the middle;

[0052] A secondary connecting rod 25, hingedly connecting the tail end of the secondary swing arm 24 and the slider 23;

[0053] The main and auxiliary connecting rods 26 are hingedly connected between the middle portion of the main swing arm 21 and the head end of the auxiliary swing arm 24 .

[0054] In the present application, the main swing arm 21 is located at the tail of the first concave plate 11 and is hinged to the first concave plate 11 via the main connecting rod 22. The auxiliary swing arm 24 is located at the head of the first concave plate 11 and is hinged to the first concave plate 11 via the auxiliary swing arm 24 and the slider 23. The main swing arm 21 and the auxiliary swing arm 24 form a two-point support for the first concave plate 11, thereby improving the stability of the first concave plate 11. The slider 23 can slide in a fixed direction within the slide groove of the frame. The main swing arm 21 and the auxiliary swing arm 24 are linked by the main and auxiliary connecting rods 26. When the main swing arm 21 rotates, the auxiliary swing arm 24 rotates synchronously, simultaneously moving the head and tail of the first concave plate 11 closer to or away from the first roller 51, so that the gap between the concave plates at different positions can be evenly adjusted, and the adjustment accuracy of the gap between the concave plates is ensured, thereby ensuring the threshing effect of the material.

[0055] like Figure 2 As shown, further, the main and auxiliary connecting rods 26 include:

[0056] An adjusting nut 261 having a certain length;

[0057] An adjusting screw 262, one end of which is provided with a thread and the two adjusting screws 262 are screwed into the two ends of the adjusting nut 261 respectively;

[0058] The locking nut 263 fixes the screwed position of the adjusting screw 262 in the adjusting nut 261 .

[0059] In the present application, the length of the primary and secondary connecting rods 26 can be adjusted by controlling the depth to which the two adjusting screws 262 are screwed into the adjusting nuts 261. Taking the first concave plate 11 at the minimum concave plate gap position as an example, adjusting the length of the primary and secondary connecting rods 26 can change the initial angle of the secondary swing arm 24, adjust the initial position of the first concave plate 11, and change the size of the minimum concave plate gap. When the length of the primary and secondary connecting rods 26 increases, the minimum concave plate gap increases; when the length of the primary and secondary connecting rods 26 decreases, the minimum concave plate gap decreases. Similarly, when the length of the primary and secondary connecting rods 26 increases, the maximum concave plate gap increases; when the length of the primary and secondary connecting rods 26 decreases, the maximum concave plate gap decreases. Since adjusting the length of the primary and secondary connecting rods 26 only affects the size of the minimum and maximum concave plate gaps, the adjustment range of the concave plate gap is determined by the piston rod stroke of the telescopic cylinder 3, thereby achieving the goal of changing the adjustment range of the concave plate gap without affecting the adjustment range of the concave plate gap.

[0060] Furthermore, the threads on both ends of the adjusting nut 261 are opposite, the threads on the two adjusting screws 262 are opposite, and the threads on the two locking nuts 263 are opposite; or a vent hole 264 is provided on the side wall of the adjusting nut 261. This design of opposite threads at both ends allows the adjusting screws 262 at both ends to move closer or farther apart simultaneously by rotating the adjusting nut 261, thereby conveniently adjusting the length of the main and secondary connecting rods 26 without removing the adjusting screws 262. The at least one vent hole 264 provided on the adjusting nut 261 provides pressure relief and facilitates the control of the adjusting screw 262 being screwed in or out of the adjusting nut 261.

[0061] Specifically, a second roller 52 is spaced apart from one side of the first roller 51. The concave plate floating adjustment mechanism also includes a second concave plate 12 disposed on one side of the second roller 52. The tail of the second concave plate 12 is hinged to the frame. The connecting rod assembly also includes a concave plate connecting rod 27 that hinges the tail of the first concave plate 11 to the head of the second concave plate 12. For a threshing device with two rollers, the first concave plate 11 and the second concave plate 12 are linked by the concave plate connecting rod 27. When the first concave plate 11 moves toward or away from the first roller 51, the tail of the first concave plate 11 can drive the head of the second concave plate 12 to rotate about its tail hinge point, moving it closer to or away from the second roller 52, thereby rotating the main swing arm 21 and synchronously adjusting the concave plate gap between the first concave plate 11 and the second concave plate 12.

[0062] Furthermore, an extension plate 111 is provided at the rear end of the first concave plate 11. The extension plate 111 extends toward the second roller 52 and curves into a recessed shape. The bottom of the extension plate 111 is hingedly connected to the head of the second concave plate 12 via a concave plate connecting rod 27. The curvature of the extension plate 111 after the curve is similar to that of the second roller 52, forming a transition between the first roller 51 and the second roller 52, and transferring material passing through the concave plate gap of the first concave plate 11 into the concave plate gap of the second concave plate 12 to prevent material blockage.

[0063] In some embodiments, the first roller 51 and the second roller 52 of the threshing apparatus are arranged side by side. The first concave plate 11 is located below the first roller 51, and the second concave plate 12 is located below the second roller 52, with the first concave plate 11 to the left of the second concave plate 12. The extension plate 111 of the first concave plate 11 first extends rightward along its original arc, then turns and continues rightward along the arc of the second roller 52. The head of the second concave plate 12 is located below the extension plate 111. The concave plate connecting rod 27 is hingedly connected to the head of the second concave plate 12 from the bottom of the extension plate 111.

[0064] In some embodiments, the head of the first concave plate 11 is on the left and the tail is on the right. The connecting rod assembly is located below the first concave plate 11. The main swing arm 21 is located to the right of the auxiliary swing arm 24. The left end of the main and auxiliary connecting rods 26 are hinged to the head end of the auxiliary swing arm 24, and the right end of the main and auxiliary connecting rods 26 are hinged between the head end of the main swing arm 21 and the mid-point of the main swing arm 21 on the frame. The outer wall of the adjustment nut 261 of the main and auxiliary connecting rods 26 is hexagonal to facilitate rotation and adjustment using a wrench.

[0065] In some embodiments, the telescopic rod and elastic element 4 are located below the connecting rod assembly. The telescopic cylinder 3 is an oil cylinder and is located to the right of the main swing arm 21. The tail end of the telescopic cylinder 3 is hinged to the frame. The elastic element 4 is located to the left of the main swing arm 21. The tail end of the elastic element 4 is hinged to the frame. The piston rod of the telescopic cylinder 3 and the actuator end of the elastic element 4 are both hinged to the head end of the main swing arm 21.

[0066] In some embodiments, the adjustment process of the concave plate floating adjustment mechanism is as follows:

[0067] When the piston rod of the telescopic cylinder 3 retracts, the main swing arm 21 rotates counterclockwise to the right limit position under the elastic force of the elastic element 4. The first concave plate 11 is positioned at the minimum concave plate gap through the combined action of the main connecting rod 22, slider 23, auxiliary swing arm 24, auxiliary connecting rod 25, and main and auxiliary connecting rods 26. The movement of the first concave plate 11 causes the second concave plate 12 to rotate clockwise about its hinge point on the frame through the concave plate connecting rod 27, also positioning the second concave plate 12 at the minimum concave plate gap. When the piston rod of the telescopic cylinder 3 extends, the telescopic rod compresses the elastic element 4, causing the main swing arm 21 to rotate clockwise. The concave plate gap of the first concave plate 11 is increased through the combined action of the main connecting rod 22, slider 23, auxiliary swing arm 24, auxiliary connecting rod 25, and main and auxiliary connecting rods 26. When the first concave plate 11 moves, the second concave plate 12 is rotated counterclockwise around its hinge point on the frame through the concave plate connecting rod 27, so that the concave plate gap of the second concave plate 12 is also increased at the same time.

[0068] A threshing device with an anti-blocking function comprises a drum and the above-mentioned concave plate floating adjustment mechanism arranged on the outside of the drum.

[0069] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0070] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0072] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A concave plate floating adjustment mechanism with anti-blocking function, characterized in that: The concave plate floating adjustment mechanism comprises: A first concave plate (11) is disposed on one side of the first roller (51); A connecting rod assembly capable of adjusting the gap between the first concave plate (11) and the first roller (51) and provided with a main swing arm (21); A telescopic cylinder (3) is provided with a piston rod capable of telescopic movement, wherein the piston rod is connected to the head end of the main swing arm (21); The elastic element (4) is provided with an actuating end capable of generating elastic force, wherein the actuating end is connected to the head end of the main swing arm (21).

2. The concave plate floating adjustment mechanism according to claim 1, characterized in that: The connecting rod assembly comprises: A main swing arm (21), the middle part of which is hinged on the frame; A main connecting rod (22) hingedly connects the tail end of the main swing arm (21) and the tail end of the first concave plate (11); A slider (23) is arranged in a slide groove of the frame and is hinged to the head of the first concave plate (11); A secondary swing arm (24), which is spaced apart at one side of the main swing arm (21) and has a middle portion hinged to the frame; A secondary connecting rod (25) is hingedly connected between the tail end of the secondary swing arm (24) and the slider (23); The main and auxiliary connecting rods (26) are hingedly connected between the middle part of the main swing arm (21) and the head end of the auxiliary swing arm (24).

3. The concave plate floating adjustment mechanism according to claim 2, characterized in that: The main and auxiliary connecting rods (26) include: An adjusting nut (261) having a certain length; An adjusting screw (262) having a thread at one end and two adjusting screws (262) are respectively screwed into two ends of the adjusting nut (261); The locking nut (263) fixes the screwed-in position of the adjusting screw rod (262) in the adjusting nut (261).

4. The concave plate floating adjustment mechanism according to claim 3, characterized in that: The threads at both ends of the adjusting nut (261) are opposite, the threads of the two adjusting screws (262) are opposite, and the threads of the two locking nuts (263) are opposite.

5. The concave plate floating adjustment mechanism according to claim 3, characterized in that: A vent hole (264) is provided on the side wall of the adjusting nut (261).

6. The concave plate floating adjustment mechanism according to claim 2, characterized in that: A second roller (52) is arranged at a distance on one side of the first roller (51), the concave plate floating adjustment mechanism also includes a second concave plate (12) arranged on one side of the second roller (52), the tail of the second concave plate (12) is hinged on the frame, and the connecting rod assembly also includes a concave plate connecting rod (27) hingedly connecting the tail of the first concave plate (11) and the head of the second concave plate (12).

7. The concave plate floating adjustment mechanism according to claim 6, characterized in that: An extension plate (111) is provided at the tail of the first concave plate (11), and the extension plate (111) extends toward the second roller (52) and turns concave, and the bottom of the extension plate (111) is hinged to the head of the second concave plate (12) through the concave plate connecting rod (27).

8. The concave plate floating adjustment mechanism according to any one of claims 1 to 7, characterized in that: The telescopic cylinder (3) and the elastic element (4) are arranged on two sides of the main swing arm (21) facing each other, and the piston rod and the execution end are simultaneously hinged to the head end of the main swing arm (21).

9. The concave plate floating adjustment mechanism according to any one of claims 1 to 7, characterized in that: The elastic element (4) is one of an oil-gas spring, a gas spring, a compression spring, and an air spring; and / or the telescopic cylinder (3) is one of an oil cylinder, a gas cylinder, and an electric cylinder.

10. A threshing device with anti-blocking function, characterized in that: The invention comprises a drum and a concave plate floating adjustment mechanism according to any one of claims 1 to 9 which is arranged on the outside of the drum.

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