Straw discharging cover of chopper and harvester

Abstract

The utility model relates to the technical field of harvester grass discharging, in particular to a chopper grass discharging cover and a harvester, a plurality of first grass guiding plates are sequentially arranged on the grass discharging cover in the first direction, a plurality of first mounting holes are sequentially formed in the grass discharging cover in the first direction, first arc-shaped holes are formed in the first grass guiding plates, and second arc-shaped holes are formed in the second grass guiding plates. A connecting assembly is jointly mounted in the first arc-shaped hole and the first mounting hole so as to connect the first straw guide plate with the straw discharging cover; after the connecting assembly penetrates through the first mounting hole, the part, corresponding to the first mounting hole, in the connecting assembly is a blocking part, no gap or small gap exists between the blocking part and the inner wall of the first mounting hole, and the blocking part is used for blocking crushed grass from passing through the first mounting hole. On the premise that the angle adjustment of the grass guide plate is not affected, the grass guide plate can prevent crushed grass from being blown out of the holes in the grass discharging cover, the blowing-out amount of the crushed grass is reduced or eliminated, and then the manual cleaning frequency is reduced or eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of grass discharge of harvesters, in particular to a grass discharge cover for a chopper and a harvester. Background Art

[0002] In the prior art, a harvester is provided with a chopper, which can chop grass into pieces. A grass discharge cover 1' is installed at the tail of the chopper, and a grass guide plate (a first grass guide plate 2' and a second grass guide plate 3') is installed on the grass discharge cover 1'. The existing chopper grass discharge cover has a long strip adjustment hole 101' on it, and a round hole is opened on the grass guide plate, such as Figure 1-Figure 5 The connecting parts are installed in turn on the round holes on the grass guide plate and the long strip adjustment holes on the grass discharge cover to fix the grass guide plate on the grass discharge cover, and the long strip adjustment holes on the grass discharge cover are used to adjust the angle of the grass guide plate, that is, by changing the position of the connecting parts in the long strip adjustment holes on the grass discharge cover, the angle adjustment of the grass guide plate is achieved; since there is no shielding structure at the long strip adjustment holes, a large amount of grass clippings are blown out from the long strip adjustment holes during the operation of the harvester, and then the grass clippings are blown out and cover the top surface of the grass discharge cover, which needs to be manually cleaned regularly. Utility Model Content

[0003] The utility model aims to provide a grass discharge cover for a chopper, which can prevent grass clippings from being blown out from the holes on the grass discharge cover while ensuring that the angle adjustment of the grass guide plate is not affected, thereby reducing or eliminating the amount of grass clippings blown out, and further reducing or eliminating the number of manual cleaning times.

[0004] Another object of the utility model is to provide a harvester which, under the premise of ensuring that the angle adjustment of the grass guide plate is not affected, can prevent grass clippings from being blown out from the holes on the grass discharge cover, thereby reducing or eliminating the amount of grass clippings blown out, thereby reducing or eliminating the number of manual cleaning times.

[0005] The technical solution of the utility model is achieved in this way:

[0006] A grass discharge cover for a chopper, wherein a plurality of first grass guide plates are sequentially arranged on the grass discharge cover along a first direction, and a plurality of first mounting holes are sequentially opened on the grass discharge cover along the first direction, a first arc-shaped hole is opened on the first grass guide plate, and a connecting component is installed in the first arc-shaped hole and the first mounting hole to connect the first grass guide plate with the grass discharge cover;

[0007] Among them, after the connecting component is passed through the first mounting hole, the part of the connecting component corresponding to the first mounting hole is a blocking part, and there is no gap or a small gap between the blocking part and the inner wall of the first mounting hole. The blocking part is used to prevent grass clippings from passing through the first mounting hole.

[0008] Furthermore, a first widened portion is provided in the middle portion of the first grass guide plate, and the first arc-shaped hole is formed in the first widened portion.

[0009] Furthermore, a second grass guide plate is provided on the grass removal cover, and the second grass guide plate is arranged corresponding to the first mounting hole at the end. The second grass guide plate is provided with a second arc hole, and the connecting component is also installed in the second arc hole and the first mounting hole at the end to connect the second grass guide plate with the grass removal cover.

[0010] Furthermore, a second widened portion is provided in the middle portion of the second grass guide plate, and the second widened portion is provided with the second arc-shaped hole.

[0011] Furthermore, the first mounting holes are circular holes and four of them are sequentially arranged, the first grass guide plates are arranged in three and are respectively installed in the first three first mounting holes, and the second grass guide plate is arranged in one and is installed in the fourth first mounting hole.

[0012] Further, the connection assembly includes a matching bolt and nut, the diameter of the screw portion of the bolt is D1, and the diameter of the first mounting hole is D2, satisfying 0≤D2-D1≤5mm;

[0013] The size of the micro gap is D3, satisfying D3≤5mm.

[0014] A grass discharge cover for a chopper, wherein a plurality of first grass guide plates are sequentially arranged on the grass discharge cover along a first direction, and a plurality of long strip holes are sequentially opened on the grass discharge cover along the first direction, wherein the length direction of the long strip holes is the first direction, a first through hole is opened on the first grass guide plate, and a connecting component is installed in the first through hole and the long strip hole to connect the first grass guide plate with the grass discharge cover;

[0015] A grass blocking piece or a grass blocking board for blocking broken grass is correspondingly arranged at one end of the long hole, and the grass blocking piece or the grass blocking board is detachably connected to the grass discharge cover.

[0016] Furthermore, a second grass guide plate is provided on the grass removal cover, and the second grass guide plate is arranged corresponding to the elongated hole at the end. The second grass guide plate is provided with a second through hole, and the connecting component is also installed in the second through hole and the elongated hole at the end to connect the second grass guide plate with the grass removal cover.

[0017] Furthermore, the first through hole and the second through hole are both round holes, three first grass guide plates are provided and are respectively installed on the first three long holes, and one second grass guide plate is provided and is installed on the fourth long hole.

[0018] A harvester comprises the chopper grass discharge cover.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The present application changes the gap between the connecting component and the first mounting hole on the grass removal cover, that is, there is no gap or a small gap between the blocking portion of the connecting component and the inner wall of the first mounting hole, so as to prevent the grass clippings from being blown out from the first mounting hole. This can reduce or eliminate the amount of grass clippings blown out, thereby reducing or eliminating the number of manual cleaning times. At the same time, by adjusting the position of the connecting component in the first arc-shaped hole, the angle adjustment of the first grass guide plate can be achieved, ensuring that the angle adjustment of the first grass guide plate is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a bottom view of a grass row cover in the prior art;

[0023] Figure 2 It is a top view of a grass row cover in the prior art;

[0024] Figure 3 A view of a long strip-shaped adjusting hole on a grass row cover in the prior art;

[0025] Figure 4 It is a structural view of the first grass guide plate in the prior art;

[0026] Figure 5 It is a structural view of the second grass guide plate in the prior art;

[0027] Figure 6 This is a bottom view of the grass removal cover of the utility model;

[0028] Figure 7 This is a top view of the grass row cover of the utility model;

[0029] Figure 8 This is a structural view of the second grass guide plate in the utility model;

[0030] Fig. 9 This is a structural view of the first grass guide plate in the utility model.

[0031] In the figure:

[0032] 1-grass cover; 101-first mounting hole; 102-second mounting hole;

[0033] 2-first grass guide plate; 201-first arc-shaped hole; 202-first widened portion;

[0034] 3-second grass guide plate; 301-second arc hole; 302-second widened portion;

[0035] 4-waist-shaped hole; 5-connecting components. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0043] Example 1

[0044] Reference Figure 6-Figure 9 The present embodiment provides a grass discharge cover 1 for a chopper, wherein a plurality of first grass guide plates 2 are sequentially arranged on the grass discharge cover 1 along a first direction, and a plurality of first mounting holes 101 are sequentially opened on the grass discharge cover 1 along the first direction, a first arc-shaped hole 201 is opened on the first grass guide plate 2, and a connecting component 5 is installed in the first arc-shaped hole 201 and the first mounting hole 101 to connect the first grass guide plate 2 with the grass discharge cover 1;

[0045] Among them, after the connecting component 5 is passed through the first mounting hole 101, the part of the connecting component 5 corresponding to the first mounting hole 101 is a blocking part, and there is no gap or a small gap between the blocking part and the inner wall of the first mounting hole 101. The blocking part is used to prevent grass clippings from passing through the first mounting hole 101.

[0046] The connecting assembly 5 can be a bolt assembly, which includes bolts and nuts for matching. When the grass discharge cover 1 is actually installed on the chopper of the harvester, one side of the grass discharge cover 1 faces upward (outer side) and the other side faces downward (inner side), and the side of the grass discharge cover 1 facing upward is also called the outer side or top side, and the side of the grass discharge cover 1 facing downward is also called the inner side or bottom side, and the plurality of first grass guide plates 2 are installed on the bottom side or inner side of the grass discharge cover 1.

[0047] When there is a small gap between the blocking portion of the connecting component 5 and the inner wall of the first mounting hole 101 , the grass clippings cannot pass through the small gap, or a very small amount of grass clippings may pass through the small gap and be blown out and cover the top surface of the grass removal cover 1 .

[0048] When there is no gap between the blocking part of the connecting assembly 5 and the inner wall of the first mounting hole 101, the shape of the connecting part on the screw is the same as the shape and size of the first mounting hole 101, for example: if the first mounting hole 101 is a regular polygon, the blocking part is also a regular polygon; if the first mounting hole 101 is a circle, the blocking part is also a circle. During the operation of the harvester, due to the blocking effect of the blocking part, the grass chopped by the chopper cannot pass between the blocking part and the inner wall of the arc hole, thereby completely eliminating the amount of grass chopped and the number of manual cleaning times.

[0049] Preferably, the first mounting hole 101 is designed to be circular.

[0050] Regardless of whether there is no gap or a small gap between the blocking portion and the inner wall of the first mounting hole 101, compared with the prior art, it can block the grass clippings from being blown out from the holes on the grass discharge cover 1, reduce or eliminate the amount of grass clippings blown out, and thus reduce or eliminate the number of manual cleaning times.

[0051] Specifically, a first widened portion 202 is provided in the middle of the first grass guide plate 2, and the first arc-shaped hole 201 is provided in the first widened portion 202. The structure of the first grass guide plate 2 is as follows: Figure 8 As shown. The bolt of the connecting component 5 is passed through the first mounting hole 101 on the grass removal cover 1 and the first arc-shaped hole 201 on the first grass guide plate 2 in sequence. The nut of the connecting component 5 is located on the inner side of the grass removal cover 1 and is screwed on the screw of the bolt, so that the first grass guide plate 2 is firmly mounted on the grass removal cover 1. Since the head of the bolt also has the function of blocking the port of the first mounting hole 101, even if there is a small gap between the blocking part of the screw and the inner wall of the first mounting hole 101, it can be blocked or blocked by the head of the screw to prevent the weeds from being blown out. Preferably, the size of the first mounting hole 101 is smaller than the size of the head of the screw. In addition, due to the design of the first widened portion 202 on the first grass guide plate 2, the structural strength of the first grass guide plate 2 is improved. By loosening the nut on the first grass guide plate 2, the first grass guide plate 2 can be put into a loose or relaxed state, and then the position of the first grass guide plate 2 can be adjusted to achieve angle adjustment and / or position adjustment of the first grass guide plate 2, that is, adjust the position of the bolt in the connecting component 5 in the first arc hole 201 to achieve angle adjustment of the first grass guide plate 2, thereby ensuring that the angle adjustment of the first grass guide plate 2 is not affected.

[0052] The grass removal cover 1 is also provided with a second grass guide plate 3, which is provided at the end of the first mounting hole 101. The first mounting hole 101 at the end is the last first mounting hole 101 opened along the first direction. The second grass guide plate 3 is provided with a second arc hole 301. The structure of the second grass guide plate 3 is as follows: Fig. 9As shown. The second arc-shaped hole 301 and the first mounting hole 101 at the end are also used to install the connecting component 5 to connect the second grass guide plate 3 to the grass removal cover 1. Due to the design of the second widened portion 302 on the second grass guide plate 3, the structural strength of the second grass guide plate 3 is improved. By loosening the nut on the second grass guide plate 3, the first grass guide plate 2 can be put in a loose or relaxed state, and then the angle adjustment and / or position adjustment of the second grass guide plate 3 can be achieved by adjusting the position of the second grass guide plate 3, that is, adjusting the position of the bolt in the connecting component 5 in the second arc-shaped hole 301 to achieve the angle adjustment of the second grass guide plate 3, ensuring that the angle adjustment of the second grass guide plate 3 is not affected.

[0053] In a preferred implementation manner of this embodiment, the first mounting holes 101 are circular holes and four of them are sequentially arranged, the first grass guide plates 2 are arranged in three and are respectively installed in the first three first mounting holes 101, and the second grass guide plate 3 is arranged in one and is installed in the fourth first mounting hole 101. Figure 6 and Figure 7 shown.

[0054] Preferably, a row of second mounting holes 102 is further provided on the grass removal cover 1 along the first direction, and the distribution of the second mounting holes 102 is as follows: Figure 7 As shown, four second mounting holes 102 are provided and are respectively used for mounting the ends of three first grass guide plates 2 and the end of one second grass guide plate 3. Accordingly, waist-shaped holes 4 corresponding to the second mounting holes 102 are respectively opened at the ends of the three first grass guide plates 2 and the end of one second grass guide plate 3. Bolt assemblies are installed in the waist-shaped holes 4 and the second mounting holes 102 to achieve further connection and fixation between the first grass guide plate 2 or the second grass guide plate 3 and the grass removal cover 1, thereby improving the connection effect between the first grass guide plate 2 or the second grass guide plate 3 and the grass removal cover 1.

[0055] The diameter of the screw portion of the bolt is D1, and after the bolt is installed in the first arc hole 201 or the second arc hole 301, a portion of the screw portion located in the first arc hole 201 or a portion thereof is a blocking portion, and the diameter of the first mounting hole 101 is D2, satisfying 0≤D2-D1≤5mm; the head of the bolt can be a regular polygon head or a round head, and when the head (screw head) of the bolt is a round head, the diameter of the round head is D4, satisfying D4>D2. When the head of the bolt can be a regular polygon head, such as the head of the bolt can be a regular hexagonal head, and the distance between the two parallel side surfaces of the regular hexagonal screw head is D5, satisfying D5>D2.

[0056] Preferably, when there is a small gap between the screw and the inner wall of the first arc-shaped hole 201 , the size of the small gap is D3, satisfying D3=D2-D1≤5mm.

[0057] This embodiment also provides a second structural composition of the bolt assembly, which includes a bolt, a nut and a gasket for use together. This structure has no requirements on the head size of the bolt, and mainly uses the gasket to prevent grass clippings from being blown out. The specific scheme is as follows:

[0058] When the first grass guide plate 2 is installed, the first arc hole 201 on it and the first installation hole 101 on the grass removal cover 1 are installed with bolts and washers, and locked by nuts. It should be noted that at least one washer is set on the screw rod of the bolt, and at least one washer is set between the head of the bolt and the grass removal cover 1, and / or at least one washer is set between the nut and the grass removal cover 1; it should also be noted here that the first grass guide plate 2 and the grass removal cover 1 are fitted together and can be regarded as a whole, that is, at least one washer can be set on the screw rod of the bolt and on both sides of the first grass guide plate 2 and the grass removal cover 1. Similarly, when the second grass guide plate 3 is installed on the grass removal cover 1 through the bolt assembly, the second arc hole 301 on the second grass guide plate 3 and the first installation hole 101 on the grass removal cover 1 are installed with bolts and gaskets, and locked by nuts. The second grass guide plate 3 and the grass removal cover 1 fit together and can be regarded as a whole, and at least one gasket can be set on the screw of the bolt and on both sides of the whole of the second grass guide plate 3 and the grass removal cover 1. The bolt assembly can better prevent the broken grass from being blown out through the action of the gasket.

[0059] Compared with the prior art, the technical solution of this embodiment has the following beneficial effects:

[0060] 1. The long strip-shaped adjustment hole on the grass removal cover 1 in the prior art is changed into a circular first mounting hole 101, which completely prevents the grass clippings from being blown out, does not require manual cleaning, and improves the appearance of the grass removal cover 1;

[0061] 2. The first arc hole 201 of the first grass guide plate 2 and the second arc hole 301 of the second grass guide plate 3 are both designed as circular arc holes, which ensures the angle adjustment function of the grass guide plates and makes the adjustment smoother;

[0062] 3. The design of the first widened portion 202 on the first grass guide plate 2 and the design of the second widened portion 302 on the second grass guide plate 3 respectively increase the edge widths of the first grass guide plate 2 and the second grass guide plate 3, thereby improving the structural strength of the grass guide plates.

[0063] Example 2

[0064] A grass discharge cover 1 for a chopper is disclosed. A plurality of first grass guide plates 2 are sequentially arranged on the grass discharge cover 1 along a first direction, and a plurality of long holes are sequentially opened on the grass discharge cover 1 along the first direction, wherein the length direction of the long holes is the first direction, a first through hole is opened on the first grass guide plate 2, and a connecting component 5 is jointly installed in the first through hole and the long hole to connect the first grass guide plate 2 with the grass discharge cover 1.

[0065] A grass blocking piece or a grass blocking board for blocking grass clippings is correspondingly provided at one end of the long hole, and the grass blocking piece or the grass blocking board is detachably connected to the grass discharge cover 1 .

[0066] A second grass guide plate 3 is also provided on the grass removal cover 1. The second grass guide plate 3 corresponds to the long hole at the end. The second grass guide plate 3 is provided with a second through hole. The second through hole and the long hole at the end are also jointly installed with the connecting component 5 to connect the second grass guide plate 3 with the grass removal cover 1.

[0067] Preferably, the first through hole and the second through hole are both round holes, three first grass guide plates 2 are provided and respectively installed in the first three long holes, and one second grass guide plate 3 is provided and installed in the fourth long hole.

[0068] This embodiment adds a detachable grass-blocking piece or grass-blocking board at the end of the long hole for blocking grass clippings, thereby preventing grass clippings from being blown out of the hole on the grass-discharging cover 1, reducing or eliminating the amount of grass clippings blown out, and further reducing or eliminating the number of manual cleaning times. The grass-blocking piece or grass-blocking board can be detachably connected to the grass-discharging cover 1 through a bolt assembly. Through the detachable design of the grass-blocking piece or grass-blocking board, when the angle of the first grass-guide plate 2 or the second grass-guide plate 3 needs to be adjusted, the corresponding grass-blocking piece or grass-blocking board can be removed. After the angle adjustment of the first grass-guide plate 2 or the second grass-guide plate 3 is completed, the corresponding grass-blocking piece or grass-blocking board can be firmly installed.

[0069] Example 3

[0070] A harvester is provided with a chopper, wherein the chopper comprises a chopper grass discharge cover 1 described in any one of Embodiment 1 or Embodiment 2. Specifically, the chopper tail is provided with the grass discharge cover 1, and a grass guide plate is installed on the grass discharge cover 1.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

[0072] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A grass chopper cover (1), characterized in that: A plurality of first grass guide plates (2) are sequentially arranged on the grass removal cover (1) along a first direction, and a plurality of first mounting holes (101) are sequentially opened on the grass removal cover (1) along the first direction, a first arc-shaped hole (201) is opened on the first grass guide plate (2), and a connecting component (5) is installed in the first arc-shaped hole (201) and the first mounting hole (101) to connect the first grass guide plate (2) with the grass removal cover (1); Wherein, after the connecting component (5) is inserted into the first mounting hole (101), the portion of the connecting component (5) corresponding to the first mounting hole (101) is a blocking portion, and there is no gap or a small gap between the blocking portion and the inner wall of the first mounting hole (101), and the blocking portion is used to block grass clippings from passing through the first mounting hole (101).

2. The chopper grass discharge cover (1) according to claim 1, characterized in that: A first widened portion (202) is provided in the middle of the first grass guide plate (2), and the first widened portion (202) is provided with the first arc-shaped hole (201).

3. The chopper cover (1) according to claim 1, characterized in that: The grass removal cover (1) is also provided with a second grass guide plate (3), the second grass guide plate (3) being arranged corresponding to the first mounting hole (101) at the end, the second grass guide plate (3) being provided with a second arc-shaped hole (301), and the second arc-shaped hole (301) and the first mounting hole (101) at the end are also jointly installed with the connecting component (5) to connect the second grass guide plate (3) with the grass removal cover (1).

4. The chopper grass discharge cover (1) according to claim 3, characterized in that: A second widened portion (302) is provided in the middle of the second grass guide plate (3), and the second widened portion (302) is provided with the second arc-shaped hole (301).

5. The chopper cover (1) according to claim 3, characterized in that: The first mounting holes (101) are circular holes and four of them are arranged in sequence, three of the first grass guide plates (2) are arranged and are respectively mounted on the first three of the first mounting holes (101), and one of the second grass guide plates (3) is arranged and is mounted on the fourth of the first mounting holes (101).

6. The chopper cover (1) according to claim 5, characterized in that: The connection assembly (5) comprises a matching bolt and nut, the diameter of the screw portion of the bolt is D1, and the diameter of the first mounting hole (101) is D2, satisfying 0≤D2-D1≤5mm; The size of the micro gap is D3, satisfying D3≤5mm.

7. A grass chopper cover (1), characterized in that: A plurality of first grass guide plates (2) are sequentially arranged on the grass removal cover (1) along a first direction, and a plurality of long holes are sequentially provided on the grass removal cover (1) along the first direction, the length direction of the long holes being the first direction, a first through hole is provided on the first grass guide plate (2), and a connecting component (5) is installed in the first through hole and the long hole to connect the first grass guide plate (2) to the grass removal cover (1); A grass blocking piece or a grass blocking board for blocking grass clippings is correspondingly provided at one end of the long hole, and the grass blocking piece or the grass blocking board is detachably connected to the grass discharge cover (1).

8. The chopper cover (1) according to claim 7, characterized in that: The grass removal cover (1) is also provided with a second grass guide plate (3), the second grass guide plate (3) being arranged corresponding to the elongated hole at the end, the second grass guide plate (3) being provided with a second through hole, the second through hole and the elongated hole at the end also being jointly installed with the connecting component (5) to connect the second grass guide plate (3) with the grass removal cover (1).

9. The chopper cover (1) according to claim 8, characterized in that: The first through hole and the second through hole are both round holes, the first grass guide plates (2) are provided in three numbers and are respectively mounted on the first three of the long holes, and the second grass guide plate (3) is provided in one number and is mounted on the fourth of the long holes.

10. A harvester, characterized in that: The utility model comprises a chopper grass discharge cover (1) according to any one of claims 1 to 9.

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