Harvester

Abstract

The utility model provides a harvester which comprises a header, a rack, a threshing cylinder, a concave grid, a vibrating screen, a fan and a grass chopping assembly, the grass chopping assembly comprises an upper protective cover, a rotating shaft, a grass chopper, an adjusting part and a grass chopping clutch part, and when the grass chopping assembly does not need to work, the adjusting part drives a traction rope through a winch to rotate the grass chopper to the position above the upper protective cover. According to the harvester, the conflict problem of operation requirements of repeatedly disassembling the grass chopper is solved, the operation mode of the harvester is rapidly switched, and meanwhile, the problem that the grass chopper needs to be completely disassembled when a user overhauls the interior of a threshing rack or transports the harvester is solved, so that the assembling and disassembling efficiency of the grass chopper is improved, and the labor intensity of the user is reduced. The grass chopper can be carried at any time.

Description

TECHNICAL FIELD

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

[0002] When agricultural harvesting operation is carried out, different needs of field operation will cause some differences in function requirements of the harvester, and for the harvester, usually including several key parts such as driving part, harvesting part, bridge part, threshing and cleaning part, grass crushing part, etc. In the related technology, the grass crusher is fixedly installed on the harvester, when the harvester is working, if the straw needs to be crushed, the grass crusher needs to be installed, if the straw does not need to be crushed, the grass crusher needs to be removed to let the straw out. Because of different needs of crushing or not crushing the straw, the grass crusher needs to be repeatedly disassembled; at the same time, when the user overhauls the inside of the threshing frame or transports the harvester, the grass crusher also needs to be disassembled, which is complicated and time-consuming.

[0003] Therefore, it is necessary to provide a harvester to overcome the defects in the above. SUMMARY

[0004] The utility model aims at providing a harvester, through the adjusting part, when the grass crusher does not need to work, the rotation of the grass crusher can be realized, the problems of low disassembly efficiency of the grass crusher, unable to carry with the vehicle and difficult operation mode switching are solved.

[0005] According to one aspect of the utility model, a kind of harvester is provided, to the advancing direction of harvester as front, including cutting table, frame, threshing cylinder, concave screen, vibrating screen, fan, grass crushing assembly, cutting table is used to cut crops and transport to rear, threshing cylinder is assembled on frame to be used to carry out threshing treatment to crops, concave screen is placed below threshing cylinder and is formed between threshing cylinder to form threshing gap with threshing cylinder to cooperate with threshing cylinder to complete threshing process, vibrating screen is placed below concave screen, fan is placed below vibrating screen front end, fan and vibrating screen cooperate to realize the cleaning effect to grain, grass crushing assembly is placed below threshing cylinder rear end to complete cutting treatment to the straw after threshing.

[0006] The grass crushing assembly includes upper shield, rotating shaft, grass crusher, adjusting part, grass crushing clutch part, the upper shield is fixedly connected with the upper end of frame, the grass crusher is placed below the upper shield and is rotationally connected with the upper shield by rotating shaft, the adjusting part is placed on the left side of harvester, when the grass crushing assembly does not need to work, the grass crusher is rotated to the upper shield by the adjusting part driving, the grass crushing clutch part is placed below threshing chamber on the left side of harvester and is used to cut off or connect the power of grass crusher.

[0007] The adjusting component includes a winch, a first pulley, a second pulley, a connecting arm, a guide shaft and a traction rope. The winch is fixed to the lower end of the frame. The first pulley is arranged above the winch and is fixed to the frame. The second pulley is arranged above the first pulley and is fixed to the upper shield. One end of the connecting arm is arranged at the end of the rotating shaft and rotates synchronously with the rotating shaft. The guide shaft is arranged at the other end of the connecting arm. One end of the traction rope is connected with the winch. The other end of the traction rope is sequentially wound around the first pulley, the second pulley, the guide shaft and the grass crusher. When the grass crushing assembly is not needed to work, the adjusting component can drive the traction rope through the winch to rotate the grass crusher above the upper shield. The above scheme can rotate the grass crusher through the adjusting component, solves the conflict problem of the operation requirement of repeatedly disassembling the grass crusher in some areas requiring to crush straw and in some other areas not requiring to crush, and at the same time, solves the problem that the user needs to completely disassemble the grass crusher when overhauling the inside of the threshing frame or transporting the harvester, thereby improving the assembling and disassembling efficiency of the grass crusher, realizing that the grass crusher can be carried at any time, and realizing the quick switching of the operation mode of the harvester.

[0008] Preferably, the grass crusher rotates around the rotating shaft by an angle ranging from 0° to 180°. The above scheme helps to realize the rotation angle of 180° of the grass crusher, and the folded gravity center is close to the gravity center of the whole machine, and the ground clearance is large.

[0009] Preferably, the adjusting component further includes a lifting lug fixed to the grass crusher. The lifting lug is arranged in front of the guide shaft in the front-rear direction and below the second pulley. The other end of the traction rope is connected with the lifting lug. Through the above scheme, the traction end of the grass crusher is arranged on the grass crusher, and the grass crusher is rotated under force.

[0010] Preferably, the traction rope can be retracted when the grass crusher is not needed to work. It does not affect the installation of the shield and improves the overall appearance.

[0011] Preferably, the connecting arm includes two arms arranged side by side. The guide shaft is arranged between the two connecting arms. The traction rope is in contact with or separated from the guide shaft. The above scheme ensures that the traction rope will not slide from the left and right directions of the guide shaft, and helps the traction rope to better pull the grass crusher to rotate.

[0012] Preferably, the adjusting component further includes a driving motor connected with the winch to drive the winch to work. The driving motor is started to drive the winch to retract or release the traction rope.

[0013] Preferably, the adjusting component further includes a winch handle connected with the winch to drive the winch to work. The winch handle is manually driven to drive the winch to retract or release the traction rope.

[0014] Preferably, the grass cutter assembly further comprises a limiting component, the limiting component comprises an upper support and a lower support rotationally connected with the upper support, the upper support is fixed to the upper cover, the lower support is fixed above the grass cutter, the upper support and the lower support both have a through hole, when the grass cutter is not needed to work, the grass cutter is driven to rotate to above the upper cover by the adjusting component, the through hole of the upper support and the through hole of the lower support are connected by a bolt. Through the above scheme, when the grass cutter is not needed to work, the grass cutter is turned over to above the upper cover, the limiting of the grass cutter can be better realized, and the stability of the position of the grass cutter in the non-working state is improved.

[0015] Preferably, the limiting component comprises two left and right arranged limiting components, and the rotating shaft is arranged through the limiting components. The stability of the limiting is improved.

[0016] Preferably, the grass cutter assembly further comprises a grass cutting clutch component for cutting off or connecting the power of the grass cutter, the grass cutting clutch component comprises a tensioning handle, a limiting pin shaft, an arc plate, an elastic pull rod and a tensioning wheel, the tensioning handle is rotationally connected with the frame, the limiting pin shaft is connected with the tensioning handle to limit the maximum rotation range of the tensioning handle, the limiting pin shaft is fixed to the frame, one end of the arc plate is rotationally connected with the tensioning handle and moves with the rotation of the tensioning handle, one end of the elastic pull rod is rotationally connected with the other end of the arc plate and is stretched with the movement of the arc plate, the tensioning wheel is fixedly connected with the other end of the elastic pull rod and can be tensioned or loosened with the tension of the elastic pull rod; the grass cutting clutch component is finally driven to tension or loosen the belt by the rotation of the tensioning handle to connect or cut off the power of the grass cutter. Through the above scheme, it is helpful to realize the quick loosening between the tensioning wheel and the belt, without the need for additional tools to assist, the quick disengagement of the grass cutter and the belt is facilitated, and the turning over is better realized.

[0017] Preferably, the grass cutting clutch component further comprises a handle shaft, the tensioning handle is sleeved on the handle shaft and can rotate around the handle shaft. Through the above scheme, it is helpful to realize the quick tensioning or loosening of the belt.

[0018] Preferably, the tensioning handle comprises a shaft sleeve portion sleeved on the handle shaft and a handle portion, the shaft sleeve portion is sleeved on the handle shaft and can rotate around the axis of the handle shaft.

[0019] Preferably, the tensioning handle further comprises a limiting plate extending in the radial direction of the shaft sleeve portion, the limiting plate is provided with an arc-shaped groove, the limiting pin shaft is arranged in the arc-shaped groove, and the rotation angle range of the tensioning handle is less than or equal to the central angle of the arc-shaped groove. Through the above scheme, it is helpful to realize the limiting of the rotation range of the tensioning handle, so as to avoid problems such as accidental loosening of the belt by the tensioning handle during operation.

[0020] Preferably, the tensioning handle further comprises a rocker arm extending in the radial direction of the shaft sleeve portion, and the arc plate is arranged between the rocker arm and the frame and one end of the arc plate is rotationally connected with the end portion of the rocker arm.

[0021] Preferably, the grass crushing clutch component further comprises a connecting rod and a connecting pin shaft, the connecting pin shaft is fixed to the frame, and the tensioning wheel is connected to the connecting pin shaft through the connecting rod to realize mounting of the tensioning wheel on the frame.

[0022] Preferably, the grass crushing assembly further comprises a connecting component fixed to the side of the frame and close to the front end of the grass crusher, the connecting component comprises a first connecting plate and a second connecting plate arranged below the first connecting plate, and the first connecting plate and the second connecting plate are detachably connected to the grass crusher. Through the above scheme, when the grass crusher needs to work, the fixing of the grass crusher to the frame is facilitated to prevent the lower end of the grass crusher from being accidentally separated from the machine body and affecting the work.

[0023] Preferably, the grass crusher comprises a safety shield, the safety shield is detachably connected to the grass crusher at a position close to the front end of the grass crusher, and the safety shield is arranged at the bottom or the top of the grass crusher. Through the above scheme, when the grass crusher is turned over above the upper shield, the safety shield can be mounted to the top of the grass crusher, at this time, since the grass crusher is in a non-working state after being turned over, the safety shield is relatively close to the lower part of the harvester, and when a person is checking from the bottom, it is helpful to prevent the accidental falling of the cutter shaft of the grass cutter and the like, thereby protecting the safety of the person.

[0024] Preferably, the grass crusher further comprises a grass crushing pulley and a grass cutter shaft rotating synchronously with the grass crushing pulley, the grass crushing pulley is arranged on the left side of the grass crusher and transmits power to the grass cutter shaft through a belt, and the grass crushing pulley is tensioned or loosened through the tensioning wheel to realize cutting off or connecting of the power of the grass crusher.

[0025] The harvester provided by the utility model comprises a grass crushing assembly, the grass crushing assembly comprises an upper shield, a rotating shaft, a grass crusher, an adjusting component and a grass crushing clutch component, the adjusting component is arranged on the left side of the harvester, when the grass crushing assembly does not need to work, the adjusting component drives a traction rope through a winch to rotate the grass crusher above the upper shield, the problem of conflicting operation requirements in different areas, i.e. some areas require crushing of straw while other areas do not require crushing, is solved, the harvester can quickly switch operation modes, the problem that the grass crusher needs to be completely disassembled when a user checks the inside of a threshing frame or transports the harvester is solved, and therefore the disassembly and assembly efficiency of the grass crusher is improved and the grass crusher can be carried at any time. BRIEF DESCRIPTION OF DRAWINGS

[0026] The utility model will be further explained in detail in combination with the drawings and specific embodiments:

[0027] Figure 1 It is a whole schematic view of the harvester.

[0028] Figure 2 It is an installation state of the grass crusher when the harvester is working.

[0029] Figure 3The installation state of the straw breaker when the harvester does not need to work;

[0030] Figure 4 The schematic view of the partial structure of the straw breaking assembly;

[0031] Figure 5 The side view of the straw breaker assembly;

[0032] Figure 6 The exploded view of the straw breaking clutch part;

[0033] Figure 7 The schematic view of the tension handle structure.

[0034] Brief Description of the Drawings:

[0035] 1, header; 2, frame; 3, threshing cylinder; 4, concave screen; 5, fan; 6, vibrating screen; 7, straw breaking assembly; 71, upper guard; 72, adjusting part; 73, rotating shaft; 74, limiting part; 75, straw breaker; 76, straw breaking clutch part; 77, connecting part; 721, winch; 722, driving motor; 723, first pulley; 724, second pulley; 725, traction rope; 726, connecting arm; 727, guide shaft; 728, lifting lug; 741, upper support; 742, lower support; 751, straw breaking pulley; 725, straw breaking knife shaft; 753, safety guard; 61, arc plate; 762, tension handle; 763, elastic pull rod; 764, tension pulley; 765, connecting rod; 766, connecting pin shaft; 767, limiting pin shaft; 771, first connecting plate; 772, second connecting plate; 7621, shaft sleeve part; 7622, rocker arm; 7623, limiting plate; 7623a, arc-shaped groove; 7624, handle part; A1, bolt; A2, belt. DETAILED DESCRIPTION

[0036] In order to more clearly illustrate the technical solutions of 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 represent some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0037] In order to make the drawing simple, only the parts related to the present application are 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 parts 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".

[0038] It should be further understood that the term "and / or" as used herein refers to any or all possible combinations of one or more of the associated listed items, and includes all possible combinations.

[0039] In this document, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or 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.

[0040] In addition, in the description of the present application, the terms "first", "second" and the like are only used for differentiation and description, and cannot be understood as indicating or implying relative importance.

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, 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 and embodiments according to these drawings without creating any creative labor.

[0042] 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 arrow F is defined as "front of the harvester" (see Figure 1 ), the direction of arrow B is defined as "rear of the harvester" (see Figure 1 ), the direction of arrow L is defined as "left of the harvester" (see Figure 2 ), the direction of arrow R is defined as "right of the harvester" (see Figure 1 ), and the front, rear, left and right in the present embodiment are taken as reference in the above defined directions.

[0043] Referring to Figures 1 to 7 , the present embodiment provides a harvester, taking the advancing direction of the harvester as front, comprising a header 1, a frame 2, a threshing cylinder 3, a concave screen 4, a vibrating screen 6, a fan 5 and a grass crushing assembly 7. The header 1 is used to cut crops and transport them backward. The threshing cylinder 3 is assembled on the frame 2 to perform threshing treatment on the crops. The concave screen 4 is U-shaped and is arranged below the threshing cylinder 3 to form a threshing gap with the threshing cylinder 3 to complete the threshing process in cooperation with the threshing cylinder 3. The vibrating screen 6 is arranged below the concave screen 4. The fan 5 is arranged below the front end of the vibrating screen 6. The fan 5 cooperates with the vibrating screen 6 to realize the cleaning function of the grains. The grass crushing assembly 7 is arranged below the rear end of the threshing cylinder 3 to complete the crushing treatment of the threshed straw.

[0044] Referring to Figure 2 As shown in the figure, the grass crushing assembly 7 includes an upper cover 71, a rotating shaft 73, a grass crusher 75, an adjusting component 72, and a grass crushing clutch component 76. The upper cover 71 is fixedly connected to the upper end of the frame 2. The grass crusher 75 is disposed below the upper cover 71 and is rotationally connected to the upper cover 71 through the rotating shaft 73. The adjusting component 72 is disposed on the left side of the harvester. When the grass crushing assembly 7 is not needed to work, the grass crusher 75 is driven to rotate above the upper cover 71 through the adjusting component 72. The grass crushing clutch component 76 is disposed on the left side of the harvester and below the threshing cylinder 3 to cut off or connect the power of the grass crusher 75.

[0045] Referring to Figure 2 As shown in the figure, the adjusting component 72 includes a winch 721, a first pulley 723, a second pulley 724, a connecting arm 726, a guide shaft 727, and a traction rope 725. The winch 721 is fixed to the lower end of the frame 2. The first pulley 723 is disposed above the winch 721 and is fixed to the frame 2. The second pulley 724 is disposed above the first pulley 723 and is fixed to the upper cover 71. One end of the connecting arm 726 is disposed at the end of the rotating shaft 73 and rotates synchronously with the rotating shaft 73. The guide shaft 727 is disposed at the other end of the connecting arm 726. One end of the traction rope 725 is connected to the winch 721. The other end of the traction rope 725 is sequentially wound around the first pulley 723, the second pulley 724, the guide shaft 727, and the grass crusher 75. When the grass crushing assembly 7 is not needed to work, the grass crusher 75 can be rotated above the upper cover 71 by the winch 721 driving the traction rope 725. The grass crusher 75 can be turned over through the adjusting component 72, which solves the conflict problem of the operation requirement of repeatedly disassembling the grass crusher 75 in some areas requiring straw crushing and in other areas not requiring straw crushing. The harvester can quickly switch between operation modes, which solves the problem that the grass crusher 75 needs to be completely disassembled when the user inspects the inside of the threshing frame 2 or transports the harvester. Therefore, the efficiency of assembling and disassembling the grass crusher 75 is improved, and the grass crusher 75 can be carried at any time.

[0046] Referring to Figure 2 and Figure 3 As shown in the figure, the grass crusher 75 rotates around the rotating shaft 73 at an angle ranging from 0° to 180°. The above-mentioned scheme helps to achieve a 180° turning angle of the grass crusher 75, and the folded center of gravity is close to the center of gravity of the whole machine, which has a large ground clearance.

[0047] The adjusting component 72 further includes a lifting lug 728 fixed to the grass crusher 75. The lifting lug 728 is disposed in front of the guide shaft 727 and below the second pulley 724 along the front-rear direction. The other end of the traction rope 725 is connected to the lifting lug 728. Through the above-mentioned scheme, the traction end of the grass crusher 75 is arranged on the grass crusher 75, and the grass crusher 75 is stressed to rotate. When the grass crusher 75 is not needed to work, the traction rope 725 can be retracted, which does not affect the installation of the cover and improves the overall aesthetics.

[0048] The connecting arms 726 are arranged in parallel on the left and right sides, and the guide shaft 727 is arranged between the two connecting arms 726, and the traction rope 725 is in contact with or separated from the guide shaft 727. The above scheme ensures that the traction rope 725 cannot slide left and right from the guide shaft 727, which helps the traction rope 725 to better pull the grass chopper 75 to rotate.

[0049] Since the electric winch 721 is more convenient and labor-saving than the manual winch 721, the electric winch 721 is adopted in the embodiment, that is, the adjusting component 72 further comprises a driving motor 722 connected with the winch 721 to drive the winch 721 to work, and the winch 721 is driven to wind or unwind the traction rope 725 by starting the driving motor 722.

[0050] The grass chopper assembly 7 further comprises a limiting component 74, and the limiting component 74 comprises an upper support 741 and a lower support 742 rotationally connected with the upper support 741. The upper support 741 is fixed to the upper cover 71, and the lower support 742 is fixed above the grass chopper 75. Both the upper support 741 and the lower support 742 have through holes. When the grass chopper assembly 7 does not need to work, the grass chopper 75 is driven by the adjusting component 72 to rotate to the upper cover 71, and the through hole of the upper support 741 is connected with the through hole of the lower support 742 by a bolt A1. The above scheme can better realize the limiting of the grass chopper 75 when the grass chopper 75 is flipped to the upper cover 71, and the stability of the position of the grass chopper 75 in the non-working state is improved.

[0051] The limiting component 74 comprises two components arranged on the left and right sides, and the rotating shaft 73 is arranged through the limiting component 74, thereby improving the stability of the limiting.

[0052] Referring to Figure 4 As shown in the figure, the grass chopper 75 comprises a safety protective cover 753, and the safety protective cover 753 is arranged at a position close to the front of the grass chopper 75 and is detachably connected with the grass chopper 75. The safety protective cover 753 is arranged at the bottom or the top of the grass chopper 75. When the grass chopper 75 is flipped to the upper cover 71, the safety protective cover 753 can be installed to the top of the grass chopper 75. At this time, since the grass chopper 75 is in the flipped non-working state, the safety protective cover 753 is relatively close to the lower part of the harvester, which is helpful for placing the knife shaft of the grass chopper and preventing accidental falling when a person is repairing from the bottom, thereby protecting the safety of the person.

[0053] The grass chopper 75 further comprises a grass chopper pulley 751 and a grass chopper knife shaft 725 which rotates synchronously with the grass chopper pulley 751. The grass chopper pulley 751 is arranged on the left side of the grass chopper 75 and transmits power to the grass chopper knife shaft 725 through a belt A2. The grass chopper pulley 751 is tensioned or loosened through a tension pulley 764 to realize the connection or disconnection of the power of the grass chopper 75.

[0054] Referring toFigure 5 As shown, the grass cutter assembly 7 further comprises a grass cutter clutch component 76 for cutting off or connecting the power of the grass cutter 75, the grass cutter clutch component 76 comprises a tensioning handle 762, a limiting pin shaft, the arc plate 61, an elastic pull rod 763, a tensioning wheel 764, the tensioning handle 762 is rotationally connected with the frame 2, the limiting pin shaft 767 is connected with the tensioning handle 762 for limiting the maximum rotation range of the tensioning handle 762, the limiting pin shaft 767 is fixed on the frame 2, one end of the arc plate 61 is rotationally connected with the tensioning handle 762 and moves with the rotation of the tensioning handle 762, one end of the elastic pull rod 763 is rotationally connected with the other end of the arc plate 61 and stretches with the movement of the arc plate 61, the tensioning wheel 764 is fixedly connected with the other end of the elastic pull rod 763 and can be tensioned or loosened with the tension of the elastic pull rod 763; the grass cutter clutch component 76 is finally driven by the rotation of the tensioning handle 762 to tension or loosen the belt A2 for connecting or cutting off the power of the grass cutter 75.

[0055] Referring to Figure 5 As shown, the grass cutter assembly 7 further comprises a connecting component 77 fixed on the side of the frame 2 and close to the front end of the grass cutter 75, the connecting component 77 comprises a first connecting plate 771 and a second connecting plate 772 arranged below the first connecting plate 771, the first connecting plate 771 and the second connecting plate 772 are respectively detachably connected with the grass cutter 75.

[0056] Referring to Figure 6 As shown, the grass cutter clutch component 76 further comprises a handle shaft, the tensioning handle 762 is sleeved on the handle shaft and can rotate around the handle shaft, which is helpful to realize quick tensioning or loosening of the belt A2.

[0057] Referring to Figure 6 and Figure 7 As shown, the tensioning handle 762 comprises a sleeve part 7621, a handle part 7624, a limiting plate 7623, a rocker arm 7622, a connecting rod 765, a connecting pin shaft 766, the sleeve part 7621 is sleeved on the handle shaft and can rotate around the axis of the handle shaft; the handle part 7624 is arranged on the sleeve part 7621; the limiting plate 7623 extends along the radial direction of the sleeve part 7621, the limiting plate 7623 is provided with an arc-shaped groove 7623a, the limiting pin shaft 767 is arranged in the arc-shaped groove 7623a, the rotation angle range of the tensioning handle 762 is less than or equal to the central angle of the arc-shaped groove 7623a; the rocker arm 7622 extends along the radial direction of the sleeve part 7621, the arc plate 61 is arranged between the rocker arm 7622 and the frame 2 and one end of the arc plate 61 is rotationally connected with the end of the rocker arm 7622; the connecting pin shaft 766 is fixed on the frame 2, the tensioning wheel 764 is connected with the connecting pin shaft 766 through the connecting rod 765 for installing the tensioning wheel 764 on the frame 2.

[0058] The working principle of the embodiment is as follows: as Figure 2As shown, when the grass chopper 75 needs to work, the first connecting plate 771 and the second connecting plate 772 are connected with the frame 2 through the bolt A1, and the grass chopper 75 performs the chopping work. Figure 3 As shown, when the grass chopper 75 does not need to work, the first connecting plate 771 and the second connecting plate 772 are disassembled, the tensioning handle 762 is rotated to tension the wheel 764, the belt A2 connected with the belt pulley of the grass chopper 75 is loosened, the tail plate (not marked) of the grass chopper 75 is closed, the bolt A1 is loosened, the safety protective cover 753 is removed, the winch 721 is driven by pressing the switch button of the driving motor 722 to pull the traction rope 725, under the driving of the winch 721, the traction rope 725 pulls the grass chopper 75 to rotate around the axis of the rotating shaft 73 through the rotating shaft 73, at this time, the connecting arm 726 rotates synchronously with the rotating shaft 73 to guide and support the traction rope 725, so that the grass chopper 75 is always in a tensioned state, until the grass chopper 75 is turned over to 180° above the upper protective cover 71, the traction rope 725 is stopped, at this time, the through hole of the upper support 741 coincides with the through hole of the lower support 742, the through holes of the upper support 741 and the lower support 742 are connected through the bolt A1, the grass chopper 75 is further limited, and the connection of the grass chopper 75 is reliable, and then the safety protective cover 753 is installed.

[0059] The harvester provided by the utility model comprises a grass chopping assembly 7, the grass chopping assembly 7 comprises an upper protective cover 71, a rotating shaft 73, a grass chopper 75, an adjusting part 72 and a grass chopping clutch part 76, the adjusting part 72 is arranged on the left side of the harvester, when the grass chopping assembly 7 does not need to work, the adjusting part 72 drives the traction rope 725 through the winch 721 to rotate the grass chopper 75 to the upper side of the upper protective cover 71, and the problems of low disassembly efficiency of the grass chopper 75, incapability of carrying the grass chopper 75 with the vehicle and difficulty in switching operation modes are solved.

[0060] It is obvious for those skilled in the art that various modifications and changes can be made to the above exemplary embodiments of the utility model without departing from the spirit and scope of the utility model. Therefore, the utility model aims to cover the modifications and changes of the utility model falling within the scope of the appended claims and equivalent technical solutions.

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 combine harvester, which comprises: a cutting platform for cutting crops and conveying them backward; a frame; a threshing cylinder mounted on the frame for threshing crops; a concave screen in the shape of a U arranged below the threshing cylinder and forming a threshing gap with the threshing cylinder to complete the threshing process together with the threshing cylinder; a vibrating screen arranged below the concave screen; a fan arranged below the front end of the vibrating screen, which works together with the vibrating screen to clean the grains; a straw chopping assembly arranged below the rear end of the threshing cylinder for chopping the threshed straw, which comprises an adjusting component, a rotating shaft, an upper guard fixed to the upper end of the frame, and a straw chopper arranged below the upper guard and connected to the upper guard through the rotating shaft; the adjusting component is arranged on the left side of the combine harvester, and when the straw chopping assembly is not needed to work, the straw chopper is driven to rotate above the upper guard through the adjusting component, which comprises: a winch fixed to the lower end of the frame; a first pulley arranged above the winch and fixed to the frame; a second pulley arranged above the first pulley and fixed to the upper guard; a connecting arm, one end of which is arranged at the end of the rotating shaft and rotates synchronously with the rotating shaft; a guide shaft arranged at the other end of the connecting arm; a traction rope, one end of which is connected to the winch, and the other end of which is arranged to pass through the first pulley, the second pulley, the guide shaft, and the straw chopper in sequence; when the straw chopping assembly is not needed to work, the straw chopper can be rotated above the upper guard by the traction rope driven by the winch of the adjusting component.

2. A harvester as claimed in claim 1 wherein: The adjusting component further comprises an eyelet fixed to the straw chopper, which is arranged in front of the guide shaft along the front-rear direction and below the second pulley, and the other end of the traction rope is connected to the eyelet.

3. A harvester as claimed in claim 2 wherein: The connecting arm comprises two arms arranged side by side, the guide shaft is arranged between the two connecting arms, and the traction rope contacts or separates from the guide shaft.

4. A harvester as claimed in claim 3 wherein: The adjusting component further comprises a driving motor connected to the winch to drive the winch to work, and the traction rope is retracted or released by the winch driven by the driving motor.

5. A harvester as claimed in claim 4 wherein: The straw chopper assembly further comprises a limiting component, which comprises an upper support fixed to the upper guard and a lower support rotatably connected to the upper support, the upper support is fixed to the upper guard, and the lower support is fixed above the straw chopper, both the upper support and the lower support have through holes, and the through holes of the upper support and the lower support are connected by bolts.

6. A harvester as claimed in claim 5 wherein: The limiting component comprises two components arranged side by side, and the rotating shaft passes through the limiting component.

7. A harvester as claimed in claim 1 or 6 wherein: The straw chopper assembly further comprises a straw clutch component arranged on the left side of the combine harvester and below the threshing cylinder to cut off or connect the power of the straw chopper, which comprises: a tensioning handle rotatably connected to the frame; A limiting pin shaft is connected with the tension handle to limit the maximum rotation range of the tension handle, and the limiting pin shaft is fixed to the frame; An arc plate is rotationally connected with one end of the tension handle and moves with the rotation of the tension handle; An elastic pull rod is rotationally connected with the other end of the arc plate and is stretched with the movement of the arc plate; A tension wheel is fixedly connected with the other end of the elastic pull rod and can be tensioned or loosened with the tension of the elastic pull rod; The grass crushing clutch component is finally driven by the rotation of the tension handle to drive the tension wheel to tension or loosen the belt to connect or disconnect the power of the grass crusher.

8. A harvester as claimed in claim 7 wherein: The grass crushing clutch component further comprises a handle shaft, and the tension handle is sleeved on the handle shaft and can rotate around the handle shaft.

9. A harvester as claimed in claim 8 wherein: The tension handle comprises a shaft sleeve portion and a handle portion, the shaft sleeve portion is sleeved on the handle shaft and can rotate around the axis of the handle shaft.

10. A harvester as claimed in claim 9 wherein: The tension handle further comprises a limiting plate extending in the radial direction of the shaft sleeve portion, the limiting plate is provided with an arc-shaped groove, the limiting pin shaft is arranged in the arc-shaped groove, and the rotation angle range of the tension handle is less than or equal to the central angle of the arc-shaped groove.

11. A harvester as claimed in claim 10 wherein: The tension handle further comprises a rocker arm extending in the radial direction of the shaft sleeve portion, and the arc plate is arranged between the rocker arm and the frame and rotationally connected with the end of the rocker arm.

12. A harvester as claimed in claim 6 or 11 wherein: Further comprising a connecting component fixed to the side of the frame and close to the front end of the grass crusher, the connecting component comprises a first connecting plate and a second connecting plate arranged below the first connecting plate, and the first connecting plate and the second connecting plate are respectively detachably connected with the grass crusher.

13. A harvester as claimed in claim 12 wherein: The grass crusher comprises a safety shield, the safety shield is detachably connected with the grass crusher at a position close to the front end of the grass crusher, and the safety shield is arranged at the bottom or the top of the grass crusher.

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