CN215269578U - Straw cutter blade connection structure and straw cutter - Google Patents

Abstract

The utility model relates to the field of agricultural machinery, in particular to a grass cutter blade connecting structure and a grass cutter. The utility model provides a straw cutter blade connection structure includes positioning bottom plate and spacing turn-ups, and positioning bottom plate is used for accepting the blade, positioning bottom plate's the extending direction who accepts the face is perpendicular with the axis that straw cutter moved the sword axle, positioning bottom plate's both sides form spacing turn-ups after buckling, spacing turn-ups vertical section with positioning bottom plate's the face of accepting is perpendicular, simultaneously, spacing turn-ups's transition section of buckling forms one side that positioning bottom plate's the face of accepting deviates from the blade. The implementation of this embodiment has solved among the prior art cutter blade connection structure blade and the straw chopper and has moved the knife shaft perpendicular and the inconvenient technical problem of assembly inadequately.

Description

Straw cutter blade connection structure and straw cutter

Technical Field

The utility model relates to the field of agricultural machinery, in particular to a grass cutter blade connecting structure and a grass cutter.

Background

The straw cutter is a straw treatment device after the combine harvester harvests grains, and is used for chopping overlong straws and throwing the overlong straws to the field. The existing combine harvester has the same structure, and consists of a movable cutter set and a fixed cutter set which are spirally arranged, the harvester drives a movable cutter shaft on the chopper to move through a belt, and the movable cutter set and the fixed cutter set interact with each other to further realize the function of chopping straws. The utility model provides a straw cutter blade connection structure among the prior art includes U type blade fixed bolster and welds in the square mounting panel of U type blade fixed bolster, the both sides welding of square mounting panel is on two U turn-ups of U type blade fixed bolster, owing to be both sides welding, hardly guarantee the levelness of square mounting panel, and the blade is the laminating again on square mounting panel, can not guarantee the straightness that hangs down of blade and straw cutter moving knife axle promptly, on the other hand, during the assembly, the bolt head need pass square mounting panel and paste the blade assembly, the assembling process is inconvenient.

Disclosure of Invention

Move the arbor perpendicular and inconvenient technical problem of assembly inadequately for blade and straw chopper among the straw chopper blade connection structure among the solution prior art, the utility model provides a straw chopper blade connection structure has solved above-mentioned technical problem.

The utility model provides a technical scheme that its technical problem adopted is:

an aspect of the utility model provides a straw cutter blade connection structure, include: the positioning bottom plate is used for bearing the blade, the extending direction of the bearing surface of the positioning bottom plate is perpendicular to the axis of the movable cutter shaft of the straw cutter, and two sides of the positioning bottom plate are bent to form limiting flanges; the vertical section of the limiting flanging is perpendicular to the bearing surface of the positioning bottom plate, and meanwhile, the bending transition section of the limiting flanging is formed on one side, deviating from the blade, of the bearing surface of the positioning bottom plate.

Furthermore, an avoiding groove is formed at the bending transition section of the limiting flanging to avoid the blade.

Furthermore, a positioning assembly is arranged at the matching position of the positioning bottom plate and the blade.

Further, the positioning assembly comprises a positioning protrusion and a positioning groove, the positioning protrusion is arranged on the bearing surface of the positioning bottom plate, the positioning groove is arranged on the blade, or the positioning groove is arranged on the bearing surface of the positioning bottom plate, and the positioning protrusion is arranged on the blade.

Furthermore, a through hole is formed in the positioning bottom plate, the through hole is opposite to the connecting hole in the blade, and the blade is fixed to the positioning bottom plate through a bolt.

The utility model also provides a straw cutter, including foretell straw cutter blade connection structure, straw cutter blade connection structure helical array moves epaxial at the straw cutter.

Based on the technical scheme, the utility model discloses the technological effect that can realize does:

the utility model discloses a grass cutter blade connection structure is the single piece that integrated into one piece's positioning bottom plate and spacing turn-ups are constituteed, do not need other welding processes before welding grass cutter moving arbor, just also avoided a series of that arouses two welding in advance to cause the inaccurate problem in follow-up location among the prior art, thereby guaranteed the blade for the straightness that hangs down of axle, the resistance has been reduced, reduce blade wearing and tearing, the shredding effect has been improved, it is more smooth and easy to shred, and integrated into one piece's single structural strength is high, it is not fragile, it is littleer with material area of contact, the power that the complete machine consumed is also lower. Additionally, the utility model discloses in owing to form one side that deviates from the blade at the face of accepting of positioning bottom plate with spacing turn-ups transition piece of buckling for the blade has been dodged to the transition piece of buckling, thereby makes the blade can the direct mount on positioning bottom plate's the face of accepting, has simplified the assembly of blade, and turn-ups vertical section can fix a position the blade again, has solved spacing problem about the blade, has improved assembly efficiency. Further, the utility model discloses a straw chopper blade connection structure changes the stick into by original seam piece, has reduced the manufacturing degree of difficulty of spare part, and whole straw chopper weight alleviates, has shortened the production cycle of product, the cost is reduced.

Drawings

FIG. 1 is a schematic view of a prior art grass cutter blade attachment arrangement;

FIG. 2 is a bottom view of a prior art grass cutter blade attachment structure;

FIG. 3 is a schematic view of a U-shaped blade holder of a prior art grass cutter blade attachment;

FIG. 4 is a bottom view of a U-shaped blade holder of a prior art grass cutter blade attachment;

FIG. 5 is a schematic view of a square support plate of a prior art grass cutter blade attachment arrangement;

FIG. 6 is a bottom view of a square support plate of a prior art grass cutter blade attachment structure;

FIG. 7 is a schematic view of the grass cutter blade attachment of the present invention after the blades are installed;

FIG. 8 is a schematic view of the grass cutter blade attachment of the present invention with no blades installed;

fig. 9 is a schematic view of the grass cutter of the present invention.

Wherein: 1-positioning bottom plate, 11-bearing surface; 2-limiting flanging, 21-vertical section and 22-bending transition section; 3-avoidance groove; 4-a blade; 5-a positioning assembly; 1' -U-shaped blade fixing bracket; 2' -square mounting plate; the 3' -blade is placed in the groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

As shown in fig. 1-6, the connecting structure of the grass cutter in the prior art includes a U-shaped blade fixing bracket 1 ' and a square support plate 2 ' welded to the U-shaped blade fixing bracket 1 ', both sides of the square support plate 2 ' are fixedly connected to the vertical sections of two U flanges of the U-shaped blade fixing bracket 1 ', a blade placing groove 3 ' is formed between the opposite surfaces of the U-shaped blade fixing bracket 1 ' and the square support plate 2 ', it is necessary to ensure the parallelism of the U-shaped blade fixing bracket 1 ' and the square support plate 2 ' during welding, it is also necessary to ensure the bilateral symmetry of the welded grass cutter connecting structure, and it is also necessary to ensure that the mounting surface of the square support plate 2 ' for mounting the blades is perpendicular to the axial direction of the shaft tube (since the U-shaped blade fixing bracket 1 ' is a bent piece, in order to avoid the bending fillet, the mounting surface of the blades is arranged on the square support plate 2 ') during assembly, and there is the clearance between the both sides of square mounting panel 2 'and the turn-ups of U vertical section, very easily the deviation appears in actual welding process, moreover, because the reason of expend with heat and contract with cold work piece can take place to warp in welding process, so the depth of parallelism between U type blade fixed bolster 1' and square mounting panel 2 'opposite face is hardly guaranteed to the finished product spare, still needs to guarantee the axial of the installation face perpendicular to central siphon of square mounting panel 2' simultaneously. In addition, in the subsequent installation process, the blades need to be connected through bolts and nuts, and the bolt heads need to penetrate through the U-shaped blade fixing support 1 'to be attached to the blades for assembly because the installation surface of the blades is one surface of the square support plate 2', so that the assembly process is inconvenient.

As shown in fig. 7-8, the connecting structure of the blade of the grass cutter of the embodiment includes a positioning bottom plate 1 and a limiting flange 2, the positioning bottom plate 1 is used for receiving the blade 4, the extending direction of the receiving surface 11 of the positioning bottom plate 1 is perpendicular to the axis of the moving blade shaft of the grass cutter, the two sides of the positioning bottom plate 1 are bent to form the limiting flange 2, the vertical section 21 of the limiting flange 2 is perpendicular to the receiving surface 11 of the positioning bottom plate 1, and meanwhile, the bending transition section 22 of the limiting flange 2 is formed on one side of the receiving surface 11 of the positioning bottom plate 1, which is far away from the blade 4.

The straw cutter blade connection structure of this embodiment is the singlepiece that integrated into one piece's locating bottom plate 1 and spacing turn-ups 2 are constituteed, do not need other welding processes before welding the straw cutter moving arbor, just also avoided in prior art with a series of that two parts weld in advance arouse cause the inaccurate problem in follow-up location, thereby guaranteed blade 4 for the straightness that hangs down of axle, the resistance has been reduced, reduce blade 4 wearing and tearing, the shredding effect has been improved, it is more smooth and easy to shred, and integrated into one piece's structural strength is high, not fragile, it is littleer with material area of contact, the power that the complete machine consumed is also lower. In addition, in the embodiment, the bending transition section 22 of the limiting flange 2 is formed on one side, away from the blade 4, of the bearing surface 11 of the positioning bottom plate 1, so that the bending transition section 22 avoids the blade 4, the blade 4 can be directly installed on the bearing surface 11 of the positioning bottom plate 1, the assembly of the blade 4 is simplified, the vertical section 21 of the limiting flange can be used for positioning the blade 4, the problem of left and right limiting of the blade 4 is solved, and the assembly efficiency is improved. Furthermore, the connecting structure of the grass cutter blade of the embodiment is changed into a single piece from the original welding piece, so that the manufacturing difficulty of parts is reduced, the weight of the whole grass cutter is reduced, the production period of products is shortened, and the cost is reduced.

In order to avoid the blade 4, an avoiding groove 3 is formed at the bending transition section 22 of the limiting flanging 2 so as to avoid the blade 4. In this way, the blade 4 can be placed directly on the receiving surface 11 of the positioning base plate 1 without being influenced by the bent transition section 22 of the limiting flange 2, i.e. when being inserted, the two sides of the blade 4 can abut against the vertical section 21 of the limiting flange 2 for positioning.

For further convenient location, the matching part of the positioning bottom plate 1 and the blade 4 is further provided with a positioning assembly 5, specifically, the positioning assembly 5 comprises a positioning protrusion and a positioning groove, the positioning protrusion is arranged on the bearing surface 11 of the positioning bottom plate 1, the positioning groove is arranged on the blade 4, or the positioning groove is arranged on the bearing surface 11 of the positioning bottom plate 1, and the positioning protrusion is arranged on the blade 4.

In order to simplify the assembly process, a through hole is formed in the positioning bottom plate 1, the through hole is opposite to the connecting hole in the blade 4, and the blade 4 is fixed on the positioning bottom plate 1 through a bolt to complete assembly.

As shown in fig. 9, the present example also provides a grass cutter, which comprises a plurality of the above grass cutter blade connecting structures, wherein the grass cutter blade connecting structures are spirally arranged on the moving blade shaft of the grass cutter.

It should be understood that the above description of the specific embodiments is only for the purpose of explanation and not for the purpose of limitation. Obvious changes or variations caused by the spirit of the present invention are within the scope of the present invention.

Claims (6)

1. A grass cutter blade connecting structure, comprising:

the straw chopper comprises a positioning bottom plate (1), wherein the positioning bottom plate (1) is used for bearing a blade (4), the extending direction of a bearing surface (11) of the positioning bottom plate (1) is vertical to the axis of a moving cutter shaft of the straw chopper, and two sides of the positioning bottom plate (1) are bent to form limiting flanges (2);

the positioning base plate is characterized by comprising a limiting flanging (2), wherein a vertical section (21) of the limiting flanging (2) is perpendicular to a bearing surface (11) of the positioning base plate (1), and meanwhile, a bending transition section (22) of the limiting flanging (2) is formed on one side, deviating from the blade (4), of the bearing surface (11) of the positioning base plate (1).

2. The grass cutter blade connecting structure according to claim 1, wherein an avoiding groove (3) is formed at the bending transition section (22) of the limiting flange (2) to avoid the blade (4).

3. The grass cutter blade connection according to claim 1, characterized in that the cooperation of the positioning bottom plate (1) and the blade (4) is further provided with a positioning assembly (5).

4. The grass cutter blade connection according to claim 3, characterized in that the positioning assembly (5) comprises a positioning projection provided on the receiving surface (11) of the positioning base plate (1) and a positioning groove provided on the blade (4), or the positioning groove is provided on the receiving surface (11) of the positioning base plate (1) and the positioning projection is provided on the blade (4).

5. The connecting structure of the grass cutter blade according to claim 1, characterized in that the positioning bottom plate (1) is provided with a through hole which is opposite to the connecting hole on the blade (4), and the blade (4) is fixed on the positioning bottom plate (1) by means of bolts.

6. A grass cutter comprising a plurality of grass cutter blade attachment formations as claimed in any one of claims 1 to 5 arranged helically on a grass cutter movable cutter shaft.

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