Grass chopping knife for straw returning device

Abstract

The utility model relates to a grass chopping knife for a straw returning device. The grass chopping knife comprises a rotary knife roll and a grass chopping knife arranged on the rotary knife roll, the rotary knife roll is connected with the driving mechanism; the multiple groups of grass chopping knives are arranged on the rotary knife roll and are spirally distributed around the rotary knife roll clockwise or anticlockwise along one end of the rotary knife roll, and each group of grass chopping knives are axially arranged at intervals; the cutter holder is fixed on the rotary cutter roller, a cavity for mounting grass chopping cutters is formed in the cutter holder, a hexagonal hole is formed in one side of the cutter holder, a round hole coaxial with the hexagonal hole is formed in the other side of the cutter holder, and each grass chopping cutter is fixed with the cutter holder through a hexagonal bolt; the hexagon bolt is arranged in the round hole in a penetrating mode, and a hexagon head of the hexagon bolt is connected into the hexagon hole in a clamped mode. The tool apron is uniform in structure, the grass chopping tool is high in installation precision and good in grass chopping effect, and the operation performance and safety of the field returning device are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to straw chopper technical field especially relates to a straw chopper for straw returning device. BACKGROUND

[0002] Straw is a kind of stem and leaf of crop, and straw returning can effectively reduce air pollution caused by straw burning, increase organic matter content in soil, improve soil structure and improve soil water and fertilizer conservation capacity.

[0003] The existing straw chopper for straw returning device has the following two defects in actual use: 1. The arrangement of the straw chopper on the rotating knife roll leads to poor chopper effect and uneven chopping, which is not conducive to spreading in the field and has poor straw returning effect; 2. The mounting seat of the straw chopper is welded with a plate, and the strength and hardness are not high. The mounting seat is made by welding process, and has certain deformation, so the mounting precision of the straw chopper is poor, which leads to frequent wear of the straw chopper during use and frequent replacement. The above technical problems need to be solved by the skilled in the art. CONTENT OF THE UTILITY MODEL

[0004] In view of the above deficiencies in the prior art, the utility model provides a straw chopper for straw returning device, which has uniform seat structure, high mounting precision of the straw chopper, good chopper effect and ensures the operation performance and safety of the straw returning device.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A straw chopper for straw returning device, comprising a rotating knife roll and a straw chopper arranged on the rotating knife roll.

[0007] The rotating knife roll is connected with a driving mechanism.

[0008] The straw chopper is arranged on the rotating knife roll in multiple groups and spirally distributed along one end of the rotating knife roll in clockwise or counterclockwise direction. Each group of the straw choppers is arranged axially spaced.

[0009] The seat is fixed on the rotating knife roll, and a cavity for mounting the straw chopper is arranged in the seat. A hexagonal hole is arranged on one side of the seat, and a circular hole coaxial with the hexagonal hole is arranged on the other side of the seat. The straw chopper is fixed with the seat by a hexagonal bolt.

[0010] The hexagonal bolt is arranged in the circular hole, and the hexagonal head is clamped in the hexagonal hole.

[0011] In a preferred embodiment of the utility model, the seat (3) is cut from a rectangular hollow profile, and an arc-shaped groove matched with the seat (3) is arranged at the contact end of the seat (3) and the rotating knife roll (1).

[0012] In one preferred embodiment of the utility model, the cutter holder is clamped on the surface of the rotary cutter roll and is welded and fixed therewith.

[0013] In one preferred embodiment of the utility model, the single-side gap between the cavity and the single-side gap of the grass cutter is less than 0.1mm.

[0014] In one preferred embodiment of the utility model, the single-side gap between the hexagonal hole and the hexagonal head of the hexagonal bolt is less than 0.2mm.

[0015] In one preferred embodiment of the utility model, the rectangular hollow section is subjected to quenching treatment.

[0016] In one preferred embodiment of the utility model, it further comprises a washer and a nut, and the hexagonal bolt is provided with the washer and the nut at one end of the cutter holder.

[0017] In one preferred embodiment of the utility model, the grass cutter is provided with four groups, and the grass cutters in the same group occupy 1 / 4 circle in the axial projection of the rotary cutter roll, and the four groups of grass cutters uniformly occupy the whole circle in the axial projection.

[0018] Beneficial effects:

[0019] When the driving mechanism drives the rotary cutter roll to rotate, the grass cutter is rotated together, since the grass cutter is distributed in a spiral shape along the rotary cutter roll and is arranged at an axial interval, the grass cutter can cut the straw from different angles and positions in the straw returning to field operation, so as to better return to field and improve the fertility and cultivation quality of the soil.

[0020] The cutter holder is cut by the rectangular hollow section, which is beneficial to guarantee the structural strength and stability of the cutter holder, so that it can bear various forces generated by the grass cutter in the operation process; the grass cutter and the cutter holder are detachably connected, so that the grass cutter is easy to replace and maintain when it is worn or damaged, the maintenance cost is reduced, and the service life of the returning to field device is improved.

[0021] When the grass cutter is installed, it is inserted into the above single cutter holder, the hexagonal head of the hexagonal bolt is clamped in the hexagonal hole, and the grass cutter is abutted and locked and fixed in the process of screwing and fixing, the grass cutter is firmly and reliably installed, so that the grass cutter does not loosen or fall off in the process of high-speed rotation and cutting of the straw, and the operation performance and safety of the device are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structure schematic view of the grass cutter for the straw returning to field device provided by the utility model;

[0023] Figure 2The utility model provides a left view of straw returning device with grass cutter,

[0024] Figure 3 The utility model discloses a group of mounting structure schematic diagram of grass cutter and rotary knife roll,

[0025] Figure 4 The utility model discloses a group of mounting left view of grass cutter and rotary knife roll,

[0026] Figure 5 The utility model discloses the structure schematic diagram of knife seat,

[0027] Figure 6 The utility model discloses the structure schematic diagram of grass cutter,

[0028] Figure 7 The utility model discloses the mounting structure schematic diagram of hexagon bolt, washer and nut,

[0029] Figure 8 The utility model discloses the mounting structure schematic diagram of knife seat and grass cutter.

[0030] In the drawing: 1 rotary knife roll,

[0031] 2 grass cutter,

[0032] 3 knife seat, 31 cavity, 32 hexagonal hole, 33 round hole,

[0033] 4 hexagon bolt,

[0034] 5 washer,

[0035] 6 nut. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the utility model.

[0037] As Figures 1-8 The utility model provides a kind of grass cutter for straw returning device, including rotary knife roll 1 and grass cutter 2 being located on rotary knife roll 1,

[0038] Rotary knife roll 1, it is connected with driving mechanism,

[0039] Grass cutter 2, it is provided with multiple groups on rotary knife roll 1, and along rotary knife roll 1 one end clockwise or counterclockwise around rotary knife roll 1 spiral distribution, and each group of grass cutter 2 is arranged axially spaced.

[0040] The cutter seat 3 is fixed on the rotary cutter roller 1, a cavity 31 for installing the grass cutting knife 2 is formed in the cutter seat 3, a hexagonal hole 32 is formed on one side of the cutter seat 3, and a circular hole 33 coaxial with the hexagonal hole 32 is formed on the other side of the cutter seat 3, and the single grass cutting knife 2 is fixed to the cutter seat 3 by using a hexagonal bolt 4;

[0041] The hexagonal bolt 4 is inserted into the circular hole 33, and the hexagonal head is clamped in the hexagonal hole 32;

[0042] The working principle and beneficial effects of the above embodiment are as follows:

[0043] The rotary cutter roller 1 is connected with the driving mechanism, and provides power for the rotation of the grass cutting knife 2; the grass cutting knife 2 is provided in multiple groups, and the multiple groups of grass cutting knives 2 are distributed in a spiral shape along the rotary cutter roller 1 at one end of the rotary cutter roller 1 in a clockwise or counterclockwise direction, and each group of grass cutting knives 2 is arranged in an axial direction at intervals, which helps to more evenly cut the straw in the straw returning process, improves the grass cutting effect, and the spiral distribution and axial interval arrangement of the grass cutting knife 2 enable the straw to be more evenly and completely cut, which is beneficial to the rapid decomposition and returning of the straw, improves the soil fertility, and improves the soil structure; the cutter seat 3 is fixed on the rotary cutter roller 1, and plays a role of bearing and fixing the grass cutting knife 2;

[0044] When the grass cutting knife 2 is installed, it is inserted into the single cutter seat 3, a bolt hole is formed at the insertion end of the grass cutting knife 2, the hexagonal bolt 4 is inserted into the circular hole 33, and the hexagonal head is clamped in the hexagonal hole 32, and during the screwing and fixing of the cutter seat 3 and the grass cutting knife 2, the hexagonal head of the hexagonal bolt 4 abuts and locks the grass cutting knife 2 away from the hexagonal head, so that the grass cutting knife 2 is stably and reliably installed on the cutter seat 3 during operation;

[0045] The grass cutting knife 2 and the cutter seat 3 are detachably connected, the grass cutting knife 2 is easy to replace and maintain when it is worn or damaged, the maintenance cost is reduced, and the service life of the device is improved;

[0046] The grass cutting knife 2 is firmly and reliably installed, the hexagonal head of the hexagonal bolt 4 is clamped in the hexagonal hole 32, and the grass cutting knife 2 can be abutted and locked during the screwing and fixing process, so that the grass cutting knife 2 will not loosen or fall off during high-speed rotation and cutting of the straw, and the operation performance and safety of the device are ensured.

[0047] In one embodiment,

[0048] The cutter seat 3 is cut from a rectangular hollow profile, and an arc-shaped groove matched with the contact end of the cutter seat 3 and the rotary cutter roller 1 is formed on the contact end of the cutter seat 3;

[0049] The cutter seat 3 is cut in a rectangular hollow profile, which is a customized tensile structure. This processing mode makes the cutter seat 3 have a cavity 31, simplifies the processing of the cutter seat 3, and is also beneficial to guarantee the structural strength and stability of the cutter seat 3, so that the cutter seat 3 can withstand various forces generated by the grass cutter 2 during operation.

[0050] An arc-shaped groove matched with the rotary cutter roller 1 is arranged at the contact end of the cutter seat 3, so that the cutter seat 3 can be closely attached to the outer circumferential surface of the rotary cutter roller 1, the contact area of the cutter seat 3 and the rotary cutter roller 1 is increased, and the stability of the cutter seat 3 on the rotary cutter roller 1 is improved.

[0051] In one embodiment,

[0052] The cutter seat 3 is clamped on the surface of the rotary cutter roller 1 and is welded and fixed. The cutter seat 3 is clamped on the surface of the rotary cutter roller 1 through the arc-shaped groove at the contact end, so that the cutter seat 3 and the rotary cutter roller 1 have certain positioning effect in the circumferential and axial directions, and the welding quality is guaranteed. At the same time, welding makes the cutter seat 3 and the rotary cutter roller 1 form an integrated structure.

[0053] In one embodiment,

[0054] The single-side gap between the cavity 31 and the single-side gap of the grass cutter 2 is less than 0.1 mm. The grass cutter 2 can maintain a stable cutting track during rotation, and will not swing or deviate due to too large gap, so as to improve the cutting precision and stability of the grass cutter 2, reduce vibration and noise, and prolong the service life.

[0055] In one embodiment,

[0056] The single-side gap between the hexagonal hole 32 and the hexagonal head of the hexagonal bolt 4 is less than 0.2 mm. Even if the grass cutter 2 is subjected to a larger impact force and torque during operation, the hexagonal bolt 4 will not easily loosen or fall off, so as to ensure that the connection between the grass cutter 2 and the cutter seat 3 is firm and reliable.

[0057] In one embodiment,

[0058] The rectangular hollow profile is subjected to quenching treatment, so as to improve the material hardness and wear resistance.

[0059] In one embodiment,

[0060] The washer 5 and the nut 6 are further included. The hexagonal bolt 4 is sleeved with the washer 5 and the nut 6 at one end of the cutter seat 3, and the fastening connection between the grass cutter 2 and the cutter seat 3 is realized by screwing the nut 6.

[0061] The hexagonal bolt 4 is arranged in one end of the tool holder 3, and a gasket 5 is sleeved.

[0062] When the nut 6 is screwed, the hexagonal head of the hexagonal bolt 4 is clamped in the hexagonal hole 32, and with the tightening of the nut 6, the straw cutter 2 is abutted and locked and fixed away from the hexagonal head.

[0063] In one embodiment,

[0064] The above straw cutter 2 is provided with four groups, and the same group of straw cutter 2 occupies 1 / 4 circle in the axial projection of the rotary cutter roller 1, and the four groups of straw cutter 2 uniformly occupy the whole circle in the axial projection; the straw cutter 2 is uniformly arranged in the circumferential direction of the rotary cutter roller 1, without obvious gap or overlapping area, which significantly improves the cutting efficiency and shortens the operation time.

[0065] In summary,

[0066] When the driving mechanism of the utility model drives the rotary cutter roller to rotate, the straw cutter is rotated together, because the straw cutter is distributed in a spiral shape along the rotary cutter roller 1 and is arranged at an axial interval, in the straw returning to the field operation, the straw cutter can cut the straw from different angles and positions, cut the straw into smaller pieces, so as to better return to the field and improve the fertility and cultivation quality of the soil;

[0067] The straw cutter and the tool holder of the utility model are detachably connected, when the straw cutter is worn or damaged, it is easy to replace and maintain, reduces the maintenance cost, and improves the service life of the device;

[0068] When the straw cutter is installed, the hexagonal head of the hexagonal bolt is clamped in the hexagonal hole, and the straw cutter is abutted and locked and fixed during the screwing process, the straw cutter is firmly and reliably installed, ensures that the straw cutter will not loosen or fall off during high-speed rotation and cutting of the straw, and protects the operation performance and safety of the device.

[0069] The basic principle, main features and advantages of the utility model are shown and described above, and the front, back, left and right are not specified, mainly for more intuitive description of the technical scheme, and do not have limiting effect. The skilled person in the art should understand that the above embodiment is only for illustrating the technical concept and characteristics of the utility model, the purpose is to enable the person skilled in the art to understand the content of the utility model and implement it, and cannot limit the protection scope of the utility model, any equivalent change or modification according to the spirit and essence of the utility model should be covered in the protection scope of the utility model.

Claims

1. A straw chopping knife for a straw returning device, characterized in that: The utility model relates to a rotary knife roll (1) and a grass crushing knife (2) arranged on the rotary knife roll (1). The rotary knife roll (1) is connected with a driving mechanism. The grass crushing knife (2) is arranged on the rotary knife roll (1) and is distributed spirally along the rotary knife roll (1) from one end of the rotary knife roll (1) in a clockwise or counterclockwise direction. The knife seat (3) is fixed on the rotary knife roll (1) and is provided with a cavity (31) for mounting the grass crushing knife (2), a hexagonal hole (32) is arranged on one side of the knife seat (3), and a circular hole (33) coaxial with the hexagonal hole (32) is arranged on the other side of the knife seat (3). The hexagonal bolt (4) is arranged in the circular hole (33) and the hexagonal head is clamped in the hexagonal hole (32).

2. The straw chopping knife for a straw mulching device according to claim 1, characterized in that: The knife seat (3) is cut from a rectangular hollow profile, and an arc-shaped groove matching the contact end of the knife seat (3) and the rotary knife roll (1) is arranged on the contact end.

3. The straw chopping knife for a straw mulching device according to claim 1, characterized in that: The knife seat (3) is clamped on the surface of the rotary knife roll (1) and is welded and fixed.

4. The straw chopping knife for a straw mulching device according to claim 1, characterized in that: The single-side gap between the cavity (31) and the grass crushing knife (2) is less than 0.1mm.

5. The straw chopping knife for a straw mulching device according to claim 1, characterized in that: The single-side gap between the hexagonal hole (32) and the hexagonal head of the hexagonal bolt (4) is less than 0.2mm.

6. The straw chopping knife for a straw mulching device according to claim 2, characterized in that: The rectangular hollow profile is subjected to quenching treatment.

7. The straw chopping knife for a straw mulching device according to claim 1, characterized in that: The utility model also comprises a washer (5) and a nut (6), and the hexagonal bolt (4) is sleeved with the washer (5) and the nut (6) at one end of the knife seat (3).

8. The straw chopping knife for a straw mulching device according to claim 1, characterized in that: The grass crushing knife (2) is arranged in four groups, and the grass crushing knives (2) in the same group occupy 1 / 4 of a circle in the axial projection of the rotary knife roll (1), and the four groups of grass crushing knives (2) uniformly occupy the entire circle in the axial projection.

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