Harvester

Abstract

The utility model provides a harvester which comprises a gap bridge, a threshing cylinder, a vibrating screen and a grain leakage prevention device, the grain leakage prevention device comprises a baffle, an extension spring, a stay wire and a spring hinge, the baffle is arranged at the tail of the threshing cylinder and between the tail of the threshing cylinder and the vibrating screen, and the baffle is connected with the threshing cylinder through the spring hinge. In the harvesting state, the baffle inclines backwards through the tension of the spring hinge to open the gap between the tail of the threshing cylinder and the vibrating screen, and when the gap bridge is lifted, the baffle is in a vertical state to shield part of the gap between the tail of the threshing cylinder and the vibrating screen. According to the harvester, it is guaranteed that the baffle is in an open state during normal harvesting operation, the baffle is switched into a shielding state when one harvesting stroke is finished, and the problem that grains in materials can be blown out of the harvester from the material outlet in the non-harvesting process between two harvesting operations is solved; the loss caused by the fact that the grains are blown out of the machine is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to an agricultural machinery field especially a harvester. BACKGROUND

[0002] The harvester is an important agricultural machinery product in the agricultural machinery field, which has complex structure and multiple functions, so as to satisfy multiple operations such as walking, harvesting, threshing and cleaning, thereby better replacing manual work to complete crop harvesting.

[0003] During the intermediate process from the completion of one harvesting stroke to the start of the next harvesting stroke, the amount of material falling from the threshing cylinder to the screen surface of the vibrating screen is reduced, and the air volume for cleaning is unchanged, so that the air volume at this time is relatively large for the reduced material on the screen surface, which can blow the grains in the material out of the machine, causing loss.

[0004] Therefore, it is necessary to provide a grain loss prevention harvester to overcome the above-mentioned defects. INVENTION CONTENTS

[0005] The utility model aims at providing a harvester, which comprises a grain loss prevention device, and the opening or shielding of the gap between the threshing cylinder and the vibrating screen is controlled, so that the grains to be blown out of the rack are blocked in the rack during the intermediate process from the end of one harvesting stroke to the start of the next harvesting stroke, thereby solving the problem of grain loss caused by the intermediate non-harvesting process of the harvester during harvesting operation.

[0006] According to one aspect of the utility model, a harvester is provided, which comprises a bridge, a threshing cylinder, a vibrating screen and a grain loss prevention device in the forward direction of the harvester. The bridge is used to transport harvested crops backward, the threshing cylinder is arranged behind the bridge for threshing treatment of the harvested crops, the vibrating screen is arranged below the threshing cylinder for screening of the threshed crops, and the grain loss prevention device is used to shield (or shield part) the gap between the tail part of the threshing cylinder and the vibrating screen. The grain loss prevention device comprises a baffle, a tension spring, a pull wire and a spring hinge. The baffle is arranged at the tail part of the threshing cylinder and between the tail part of the threshing cylinder and the vibrating screen. One end of the tension spring is connected with the bridge, and the other end of the tension spring is connected with the baffle through the pull wire. The pull wire is arranged in the harvester along the front and back directions. The baffle is connected with the threshing cylinder through the spring hinge. When the harvester is in the harvesting state, the baffle is inclined backward through the tension of the spring hinge to open the gap between the tail part of the threshing cylinder and the vibrating screen. When the bridge is lifted, the baffle is in a vertical state to shield part of the gap between the tail part of the threshing cylinder and the vibrating screen.

[0007] The gap between the tail of the threshing cylinder and the vibration screen is opened or partially blocked by the opening and closing control of the baffle driven by the bridge lifting or lowering, the baffle is in the open state under the tension of the spring hinge during normal harvesting operation, the baffle is switched from the open state to the blocking state by the bridge lifting to pull the pull wire at the end of one harvesting stroke, the pull wire is released when the bridge is lowered at the beginning of the next harvesting stroke, and the baffle returns to the open state under the tension of the spring hinge, and the harvester normally operates. The scheme is simple in structure and convenient to operate, ensures that the baffle is in the open state during normal harvesting operation, switches to the blocking state at the end of one harvesting stroke, improves the problem that the grains in the material are blown out of the harvester during the non-harvesting process between two harvesting operations, and effectively reduces the loss caused by the grains blown out of the machine.

[0008] Preferably, the baffle is arranged left and right along the harvester to open or block the gap between the tail of the threshing cylinder and the vibration screen.

[0009] Preferably, the threshing cylinder comprises a frame and a cylinder part in the frame, and the baffle is connected to the threshing frame by a spring hinge.

[0010] Preferably, the baffle further comprises a limiting part arranged on the upper part of the front side of the baffle, one end of the pull wire is connected to the limiting part, and the limiting part is used to limit the baffle from continuing to rotate forward after rotating from the open state to the vertical closed state when the limiting part abuts against the frame of the threshing cylinder.

[0011] Preferably, the spring hinge is fixedly connected to the upper part of the baffle in front of the baffle, and the number of spring hinges is at least two.

[0012] Preferably, the spring hinge and the limiting part are not coincident in position.

[0013] Preferably, the lower part of the baffle is inclined backward by the tension of the spring hinge to open the gap between the tail of the threshing cylinder and the vibration screen during harvesting.

[0014] Preferably, the lower end of the bridge is provided with a first hanging part, and one end of the tension spring is hung on the first hanging part.

[0015] Preferably, the end of the pull wire connected to the tension spring is provided with a second hanging part, and the other end of the tension spring is hung on the second hanging part. The above-mentioned scheme helps to prevent the pull wire from being easily damaged or broken due to excessive tension when the bridge is lifted.

[0016] Preferably, the anti-run grain device further comprises a connecting plate fixed to the tail of the threshing cylinder and placed in front of the baffle, and the pull wire is arranged in the connecting plate.

[0017] Preferably, the pull wire comprises a pull wire sleeve and an inner pull wire movably arranged in the pull wire sleeve, the inner pull wire is longer than the pull wire sleeve, one end of the inner pull wire is connected with the limiting part, and the other end of the inner pull wire is connected with the second hanging part, and the overbridge is lifted to drive the inner pull wire to pull the baffle to rotate to the vertical state to shield the gap between the tail of the threshing cylinder and the vibrating screen. Through the above scheme, the opening and closing control of the gap between the tail of the threshing cylinder and the vibrating screen in the harvesting state of the harvester and the non-harvesting state when the fan is still cleaning can be realized, which helps to prevent the grains from being blown out.

[0018] Preferably, the pull wire further comprises a hollow screw sleeved on the inner pull wire and fixedly connected with the pull wire sleeve at the end close to the baffle, and the hollow screw is arranged in the connecting plate and connected with the connecting plate by a nut to fix the pull wire sleeve. Through the above scheme, the protection and limiting of the inner pull wire can be realized, and the service life of the pull wire is improved.

[0019] Preferably, the pull wire is arranged in the harvester, and further, the threshing cylinder comprises a frame and a cylinder part in the frame, and the pull wire is arranged in the frame along the front and back directions.

[0020] Preferably, on the basis of the above scheme, the spring hinges can be two or more, and are arranged symmetrically or asymmetrically on both sides of the pull wire along the left and right directions of the harvester, and can be adjusted according to the opening and closing state of the baffle to control the opening of the baffle by the spring hinges while reducing the product cost as much as possible.

[0021] The utility model provides a kind of harvester, including overbridge, threshing cylinder, vibrating screen, anti-run grain device, and the size of the gap between the tail of threshing cylinder and vibrating screen is controlled by the opening and closing of baffle being lifted or lowered by overbridge, the scheme is simple in structure and easy to operate, and it is guaranteed that baffle is in open state when normal harvesting operation, and it is switched to closed state when a harvesting stroke ends, effectively reduce the loss caused by grain being blown out of machine in non-harvesting state. BRIEF DESCRIPTION OF DRAWINGS

[0022] The utility model will be further explained in detail in connection with the drawings and specific embodiment:

[0023] Figure 1 It is schematic diagram for harvester of baffle open state;

[0024] Figure 2 It is schematic diagram for harvester of baffle closed state; Figure 1Detail view of the middle A1 position;

[0025] Figure 3 For Figure 1 Detail view of the middle B position;

[0026] Figure 4 For the baffle closed state harvester schematic diagram;

[0027] Figure 5 For Figure 4 Detail view of the middle A2 position.

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 1, bridge; 2, threshing cylinder; 3, anti-run grain device; 4, vibrating screen; 5, walking assembly; 301, spring hinge; 302, baffle; 303, limiting part; 304, pull wire; 305, connecting plate; 306, tension spring; 101, first hanging part; 3041, inner pull wire; 3042, hollow screw; 3043, nut; 3044, gasket; 3045, pull wire sleeve; 3046, second hanging part. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, without creative labor, other drawings can also be obtained according to these drawings.

[0031] In order to make the drawing simple, only the part related to the present application is shown in each drawing, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the components with the same structure or function is shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one".

[0032] It should be further understood that the term "and / or" used in the specification and claims of the present application means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0033] In this article, it is necessary to explain that unless there is a clear provision and limitation, the terms "installation", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] In addition, in the description of the present application, the terms "first", "second" and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.

[0035] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the specific embodiments of the present application will be described below with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor, and can obtain other embodiments.

[0036] The embodiments for implementing the present application are described based on the drawings. It should be noted that in the following description, the direction of straight line F is set as "the front of the harvester" (refer to Figure 1 ), and the direction of straight line B is set as "the rear of the harvester" (refer to Figure 1 ).

[0037] Referring to Figures 1 to 5 , the present embodiment provides a harvester, including a bridge 1, a threshing cylinder 2, a vibrating screen 4, a grain run-off preventing device 3 in the forward direction of the harvester, the bridge 1 is used to transport the harvested crops backward, the threshing cylinder 2 is placed behind the bridge 1 to process the harvested crops, the vibrating screen 4 is placed below the threshing cylinder 2 to screen the threshed crops, the walking assembly 5 is placed below the vibrating screen 4 to drive the harvester to move, the grain run-off preventing device 3 is used to shield (or shield part) the gap between the tail of the threshing cylinder 2 and the vibrating screen 4, the grain run-off preventing device 3 includes a baffle 302, a tension spring 306, a pull wire 304 and a spring hinge 301, the baffle 302 is placed at the tail of the threshing cylinder 2 and between the tail of the threshing cylinder 2 and the vibrating screen 4, one end of the tension spring 306 is connected with the bridge 1, the other end of the tension spring 306 is connected with the baffle 302 through the pull wire 304, the pull wire 304 is arranged along the front and back of the harvester, the baffle 302 is connected with the threshing cylinder 2 through the spring hinge 301, the baffle 302 is inclined backward by the tension of the spring hinge 301 to open the gap between the tail of the threshing cylinder 2 and the vibrating screen 4 in the harvesting state, and the baffle 302 is in a vertical state to shield part of the gap between the tail of the threshing cylinder 2 and the vibrating screen 4 when the bridge 1 is lifted.

[0038] The threshing cylinder 2 comprises a frame and a cylinder part inside the frame, the baffle 302 is connected with the threshing frame through the spring hinge 301.

[0039] As shown in Figure 2 The baffle 302 further comprises a limiting part 303, which is arranged at the upper part of the front side of the baffle 302, one end of the pull wire 304 is connected with the limiting part 303, and the limiting part 303 is used to limit the baffle 302 from continuing to rotate forward after rotating from the open state to the vertical closed state when abutting against the frame of the threshing cylinder 2.

[0040] The spring hinge 301 is fixedly connected with the upper part of the baffle 302 in front of the baffle 302, and the number of the spring hinge 301 is at least two; the spring hinge 301 is not coincided with the limiting part 303; the lower part of the baffle 302 is inclined backward through the tension of the spring hinge 301 in the harvesting state, so as to open the gap between the tail part of the threshing cylinder 2 and the vibrating screen 4.

[0041] The anti-run grain device 3 further comprises a connecting plate 305 fixed to the tail part of the threshing cylinder 2 and arranged in front of the baffle 302, and the pull wire 304 is arranged through the connecting plate 305. Through the above scheme, the fixation of the pull wire 304 is facilitated, the stability of the structure is improved, and the pull wire 304 is prevented from interfering with the operation of the harvester.

[0042] As shown in Figure 1 and Figure 3 The lower end of the bridge 1 is provided with a first hanging part 101, and one end of the tension spring 306 is hung on the first hanging part 101.

[0043] The end of the pull wire 304 connected with the tension spring 306 is provided with a second hanging part 3046, and the other end of the tension spring 306 is hung on the second hanging part 3046. Through the above scheme, the problem that the pull wire 304 is easily damaged or broken due to too large tension when the bridge 1 is lifted is prevented.

[0044] As shown in Figure 2 and Figure 3As shown, the pull wire 304 includes a pull wire sleeve 3045, an inner pull wire 3041 movably arranged in the pull wire sleeve 3045, a hollow screw 3042, a nut 3043, a gasket 3044, the inner pull wire 3041 is longer than the pull wire sleeve 3045, one end of the inner pull wire 3041 is connected with the limiting portion 303, the other end of the inner pull wire 3041 is connected with the second hanging portion 3046, when the bridge 1 is lifted, the inner pull wire 3041 is pulled to rotate the baffle 302 to the vertical state to shield the gap between the tail of the threshing cylinder 2 and the vibrating screen 4, the hollow screw 3042 is sleeved on the inner pull wire 3041 and is fixedly connected with the end of the pull wire sleeve 3045 close to the baffle 302, the hollow screw 3042 is arranged in the connecting plate 305 and the connecting plate 305 is connected by the nut 3043 to fix the pull wire sleeve 3045, and the gasket 3044 is arranged between the nut 3043 and the connecting plate 305.

[0045] The pull wire 304 is arranged in the harvester, further, the threshing cylinder 2 includes a frame and a cylinder portion in the frame, and the pull wire 304 is arranged in the frame along the front and back directions.

[0046] As shown in the accompanying drawings, the working principle of the embodiment is as follows: Figure 1 and Figure 2 As shown, when the harvester is harvesting, the lower part of the baffle 302 is arranged at the rear of the harvester to be inclined relative to the upper part of the baffle 302 under the action of the spring tension, at this time, the tail of the threshing cylinder 2 and the gap between the tail of the threshing cylinder 2 and the vibrating screen 4 are in the open state; as shown in the accompanying drawings, Figure 4 and Figure 5 As shown, in the intermediate process from the end of one harvesting stroke to the beginning of the next harvesting stroke, the material falling from the threshing cylinder 2 to the screen surface of the vibrating screen 4 is reduced, and the air volume for cleaning is unchanged, at this time, the air volume is relatively large for the reduced material on the screen surface, which can blow the grains in the material out of the machine to cause loss, the bridge 1 is lifted to pull the tensile spring 306, the tensile spring 306 drives the pull wire 304 to pull the lower part of the baffle 302 to rotate forward until the baffle 302 is in the vertical position and is abutted against the frame of the threshing cylinder 2 through the limiting portion 303, and the baffle 302 does not rotate any more, the tail of the threshing cylinder 2 and the gap between the tail of the threshing cylinder 2 and the vibrating screen 4 are at least partially shielded, the grains to be blown out of the frame are blocked in the frame, so that the loss of grain caused by the harvester in the intermediate process is avoided; when the next harvesting stroke begins, the bridge 1 falls, so that the pull wire 304 is loosened, under the action of the tension of the spring hinge 301, the baffle 302 returns to the open state, and the harvester normally works.

[0047] The utility model provides a harvester, including bridge 1, threshing cylinder 2, vibrating screen 4, prevent running grain device 3, through bridge 1 lifts or the size of the gap between the tail of threshing cylinder 2 and vibrating screen 4 up and down is controlled to the opening and closing of baffle 302, the scheme simple structure convenient operation has guaranteed, has guaranteed baffle 302 to be in the open state when normal harvesting operation, switches for the closed state when a harvesting stroke ends, effectively reduced the loss that the grain is blown out machine outside to cause when non - harvesting state.

[0048] It is obvious to those skilled in the art that various modifications and variations can be made to the above exemplary embodiments of the utility model without departing from the spirit and scope of the utility model. Therefore, it is intended that the utility model cover modifications and variations of the utility model that fall within the scope of the appended claims and their equivalents.

Claims

1. A harvester, with a forward direction being the direction of forward travel of the harvester, characterized in that The utility model relates to a kind of harvesting machine, including: Bridge, the bridge is used to transport harvesting crops backwards; Roller, the roller is placed behind the bridge to thresh harvesting crops; Vibrating screen, the vibrating screen is placed below the roller to screen threshed crops; Anti-run grain device, the anti-run grain device is used to shield the gap between the tail of the roller and the vibrating screen, the anti-run grain device includes: Baffle, the baffle is placed in the tail of the roller and between the tail of the roller and the vibrating screen; Stretch spring, one end of the stretch spring is connected with bridge, the other end of the stretch spring is connected with baffle through pull wire; The pull wire is along front and back and is arranged in harvester; Spring hinge, the baffle is connected with the roller through the spring hinge; When harvesting, the baffle is inclined backwards through the tension of the spring hinge to open the gap between the tail of the roller and the vibrating screen; When the bridge is lifted, the baffle is in vertical state to shield part of the gap between the tail of the roller and the vibrating screen.

2. A harvester as claimed in claim 1 wherein: The baffle further includes a limiting portion placed on the upper part of the front side of the baffle, one end of the pull wire is connected with the limiting portion, and the limiting portion is in abutment with the frame of the roller to limit the baffle from rotating from the open state to the vertical closed state and stopping rotating forward.

3. A harvester as claimed in claim 2 wherein: The spring hinge is fixedly connected with the upper part of the baffle in front of the baffle, and the number of the spring hinge is at least two.

4. A harvester as claimed in claim 3 wherein: The lower end of the bridge is provided with a first hanging portion, and one end of the stretch spring is hung on the first hanging portion.

5. A harvester as claimed in claim 4 wherein: The end of the pull wire connected with the stretch spring is provided with a second hanging portion, and the other end of the stretch spring is hung on the second hanging portion.

6. A harvester as claimed in claim 5 wherein: The anti-run grain device further includes a connecting plate fixed to the tail of the roller and placed in front of the baffle, and the pull wire is arranged in the connecting plate.

7. A harvester as claimed in claim 6 wherein: The pull wire includes a pull wire sleeve and an inner pull wire movably arranged in the pull wire sleeve relative to the pull wire sleeve, the inner pull wire is longer than the pull wire sleeve, one end of the inner pull wire is connected with the limiting portion, and the other end of the inner pull wire is connected with the second hanging portion, and the bridge is lifted to drive the inner pull wire to rotate the baffle to the vertical state to shield part of the gap between the tail of the roller and the vibrating screen.

8. A harvester as claimed in claim 7 wherein: The pull wire further includes a hollow screw sleeved on the inner pull wire and fixedly connected with the pull wire sleeve relative to the end close to the baffle, the hollow screw is arranged in the connecting plate, and the connecting plate is connected by a nut to fix the pull wire sleeve.

9. A harvester as claimed in claim 8 wherein: The pull wire is arranged in the harvester.

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