Stubble height adjusting device of straw smashing and returning machine

Abstract

The stubble height adjusting device of the straw smashing and returning machine comprises a returning machine body, a left sliding plate and a right sliding plate are arranged on the left side and the right side of the returning machine body, adjusting holes are formed in the left sliding plate and the right sliding plate, and installation supports are fixedly arranged on the left side and the right side of the bottom of the returning machine body through U-shaped bolts and locking nuts respectively. The whole mounting support is of a U-shaped structure and is provided with a pin shaft mounting hole, a pin shaft is arranged in the pin shaft mounting hole, the outer portion of the pin shaft is movably sleeved with a swing arm, the swing arm is fixedly connected with a hub shaft assembly, and the hub shaft assembly comprises an adjusting hole plate and a hub shaft. By arranging the swing arm and the hub shaft assembly which are matched with each other, the straw stubble height can be adjusted, and the problems that a long roller turns at the field head to drag soil, the ground surface is uneven, the roller is overhead, and the stubble height is inconsistent are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular to a stubble height adjusting device for a straw crushing and returning machine. Background Technique

[0002] The cutting height of field straw of the existing straw returning machine is restricted by a long roller and left and right sliding plates. During operation, due to the uneven surface of the operation area, only part of the long roller contacts the ground, so the stubble height of the straw is uneven, which brings inconvenience to the sowing of the next crop; at the same time, at the field head of the mechanized harvesting plot, the surface of the ground is damaged due to the turning of the harvester, resulting in a large difference in the surface height. Therefore, the long roller is particularly prone to dragging the soil, resulting in the equipment being unable to work properly.

[0003] Based on the defects of the above-mentioned straw returning machine, we optimized the structure of the limit roller of the straw returning machine to form a technical solution for a stubble height adjusting device for a straw crushing and returning machine. Content of the Utility Model

[0004] The purpose of the utility model is to provide a stubble height adjusting device for a straw crushing and returning machine in view of the defects and deficiencies of the prior art.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a stubble height adjusting device for a straw crushing and returning machine, including a main body of the returning machine. Installation brackets are fixedly arranged on the left and right sides of the main body of the returning machine through U-shaped bolts and locking nuts. The installation brackets are of an overall U-shaped structure and are provided with pin shaft installation holes. A pin shaft is arranged in the pin shaft installation holes. An oscillating arm is movably sleeved outside the pin shaft. A first rotating hole and a plurality of first adjusting holes are opened on the oscillating arm. The first adjusting holes are arranged in an arc centered on the first rotating hole. A hub shaft assembly is fixedly connected to the oscillating arm. The hub shaft assembly includes an adjusting hole plate and a hub shaft. A second rotating hole and a plurality of second adjusting holes are opened on the adjusting hole plate. The second adjusting holes are arranged in an arc centered on the second rotating hole. The first rotating hole corresponds to the second rotating hole and is fixed through a set of bolt and nut. The first adjusting holes and the second adjusting holes correspond one by one and are fixed through two sets of bolt and nut. A tire is movably sleeved on the hub shaft.

[0006] Further, the mounting bracket includes a fixing plate. U-bolt mounting holes are provided at the four corners of the fixing plate. A pair of pin shaft mounting plates are provided on the fixing plate. Pin shaft mounting holes are provided on the pin shaft mounting plates. A limiting plate is provided inside the pin shaft mounting plates. A limiting groove is provided at the bottom of the limiting plate. A pair of upper and lower limiting blocks are provided at the top of the swing arm. The upper and lower limiting blocks are embedded in the limiting groove, and the limiting groove restricts the movement range of the upper and lower limiting blocks.

[0007] After adopting the above structure, the beneficial effects of the present utility model are as follows:

[0008] By providing a swing arm and a hub shaft assembly, which cooperate with each other, the stubble height of the straw is adjusted by using the adjustment orifice plate on the hub shaft assembly, the hole position change on the swing arm, and the relative position of the left and right slide plate adjustment holes. The adjustment is simple and convenient, solving the problems of the long drum dragging soil during turning at the field head, uneven ground surface, the drum being suspended in the air, and inconsistent stubble height.

[0009] The present utility model can be matched with various models of rotary tillers and is fixed by U-bolts, and the installation is simple and convenient.

[0010] A limit is provided between the swing arm and the mounting bracket of the present utility model, so that the swing arm drives the tire to swing around the pin shaft only within a set range, ensuring that the distance between the blade on the cutter shaft of the main body of the rotary tiller and the ground remains stable. Description of the Drawings

[0011] Figure 1 is the front view of the present utility model;

[0012] Figure 2 is the side view of the present utility model;

[0013] Figure 3 is the structural schematic diagram of the tire part of the present utility model;

[0014] Figure 4 is the cross-sectional view of the tire part of the present utility model;

[0015] Figure 5 is the structural schematic diagram of the mounting bracket of the present utility model;

[0016] Figure 6 is the structural schematic diagram of the swing arm of the present utility model;

[0017] Figure 7 is the structural schematic diagram of the hub shaft assembly of the present utility model.

[0018] Description of the Reference Numerals:

[0019] 1. Straw returning machine main body, 2. Left slide plate, 3. Right slide plate, 4. Adjustment hole, 5. U-bolt, 6. Mounting bracket, 61. Pin shaft mounting hole, 62. Fixed plate, 63. U-bolt mounting hole, 64. Pin shaft mounting plate, 65. Limiting plate, 66. Limiting groove, 7. Swing arm, 71. First rotation hole, 72. First adjustment hole, 73. Upper and lower limiting blocks, 8. Hub shaft assembly, 81. Adjustment hole plate, 82. Hub shaft, 83. Second rotation hole, 84. Second adjustment hole, 9. Tire. Detailed implementation mode

[0020] The following further explains the present utility model in conjunction with the attached drawings.

[0021] In order to make the purpose, technical solution and advantages of the present utility model clearer, the following further details the present utility model in conjunction with the attached drawings and specific implementation modes. It should be understood that the specific implementation modes described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0022] Refer to Figures 1-7 , a stubble height adjustment device for a straw crushing and returning machine, comprising a straw returning machine main body 1. Left slide plate 2 and right slide plate 3 are arranged on the left and right sides of the straw returning machine main body 1. Adjustment holes 4 are opened on both the left slide plate 2 and the right slide plate 3. The left and right sides of the bottom of the straw returning machine main body 1 are respectively fixedly provided with mounting brackets 6 through U-bolts 5 and locking nuts. The mounting bracket 6 is of an overall U-shaped structure and is provided with a pin shaft mounting hole 61. A pin shaft is arranged in the pin shaft mounting hole. The outer part of the pin shaft is movably sleeved with a swing arm 7. A first rotation hole 71 and a plurality of first adjustment holes 72 are opened on the swing arm 7. The first adjustment holes 72 are arranged in an arc centered on the first rotation hole 71. A hub shaft assembly 8 is fixedly connected to the swing arm 7. The hub shaft assembly 8 includes an adjustment hole plate 81 and a hub shaft 82. A second rotation hole 83 and a plurality of second adjustment holes 84 are opened on the adjustment hole plate 81. The second adjustment holes 84 are arranged in an arc centered on the second rotation hole 83. The first rotation hole 71 corresponds to the second rotation hole 83 and is fixed by a set of bolt and nut. The first adjustment holes 72 and the second adjustment holes 84 correspond one by one and are fixed by two sets of bolt and nut. A tire 9 is movably sleeved on the hub shaft 82. Specifically, when it is necessary to adjust the stubble height, relevant operations are performed on the swing arm 7 and the hub shaft assembly 8:

[0023] (1) Raise the stubble: Lift the straw returning machine to make the tire leave the ground. Loosen the bolt and nut assemblies on the first rotation hole and the second rotation hole and the first adjustment hole and the second adjustment hole, and remove the bolt and nut assemblies on the first adjustment hole and the second adjustment hole. Rotate the tire downward, that is, the adjustment hole plate 81 rotates around the rotation hole, so that the first adjustment hole and the second adjustment hole are aligned again. Insert the two removed bolts and then tighten them;

[0024] (2)Lower the stubble height: Raise the rotary tiller to make the tires leave the ground. Loosen the bolt and nut assemblies on the first and second rotary holes and the first and second adjustment holes, and remove the bolt and nut assemblies on the first and second adjustment holes. Rotate the tire upward, that is, rotate the adjustment hole plate 81 around the rotary hole, so that the first and second adjustment holes are realigned, insert the two removed bolts, and then tighten them.

[0025] The above operations can be carried out in cooperation with the left and right sliding plates, and adjusted through the adjustment holes on the left and right sliding plates and the left and right side plates of the hood. The position shown in the figure is the lowest stubble height (see Figure 2 ), and raising the adjustment can increase the stubble height.

[0026] In this embodiment, the mounting bracket 6 includes a fixing plate 62. U-shaped bolt mounting holes 63 are provided at the four corners of the fixing plate 62. A pair of pin mounting plates 64 are provided on the fixing plate 62. Pin mounting holes 61 are provided on the pin mounting plates 64. A limiting plate 65 is provided inside the pin mounting plates 64. A limiting groove 66 is provided at the bottom of the limiting plate 65. A pair of upper and lower limiting blocks 73 are provided at the top of the swing arm 7. The upper and lower limiting blocks 73 are embedded in the limiting groove 66, and the limiting groove 66 limits the movement range of the upper and lower limiting blocks 73. The U-shaped bolt mounting holes 63 are used to mount the U-shaped bolts 5, and the mounting bracket 6 is fixed to the bottom of the rotary tiller main body 1 through the U-shaped bolts 5. A limiting groove 66 and upper and lower limiting blocks 73 are provided between the swing arm 7 and the mounting bracket 6 for limiting, so that the swing arm 7 drives the tire 9 to swing around the pin only within a set range, ensuring that the distance between the blades on the cutter shaft of the rotary tiller main body from the ground remains stable.

[0027] The above is only used to illustrate the technical solution of the present invention and not to limit it. Other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, shall be covered by the scope of the claims of the present invention.

Claims

1. A stubble height adjusting device for a straw crushing and returning machine, comprising a main body of the returning machine, wherein left and right sliding plates are arranged on the left and right sides of the main body of the returning machine, and adjusting holes are formed in both the left and right sliding plates, and it is characterized in that: On the left and right sides of the bottom of the main body of the rotary tiller for returning straw to the field, mounting brackets are fixedly installed through U-bolts and lock nuts respectively. The mounting brackets are of a U-shaped structure as a whole, and are provided with pin installation holes. A pin is arranged in the pin installation holes, and a swing arm is movably sleeved outside the pin. A first rotary hole and a plurality of first adjustment holes are formed in the swing arm. The first adjustment holes are arranged in an arc centered on the first rotary hole. A hub shaft assembly is fixedly connected to the swing arm. The hub shaft assembly includes an adjustment hole plate and a hub shaft. A second rotary hole and a plurality of second adjustment holes are formed in the adjustment hole plate. The second adjustment holes are arranged in an arc centered on the second rotary hole. The first rotary hole corresponds to the second rotary hole and is fixed by a set of bolts and nuts. The first adjustment holes and the second adjustment holes correspond one by one and are fixed by two sets of bolts and nuts. A tire is movably sleeved on the hub shaft.

2. The stubble height adjusting device of a straw crushing and returning machine according to claim 1, characterized in that: The mounting bracket includes a fixing plate. U-bolt mounting holes are formed at the four corners of the fixing plate. A pair of pin mounting plates are arranged on the fixing plate. Pin mounting holes are formed in the pin mounting plates. A limiting plate is arranged on the inner side of the pin mounting plate. A limiting groove is formed at the bottom of the limiting plate; a pair of upper and lower limiting blocks are arranged at the top of the swing arm. The upper and lower limiting blocks are embedded in the limiting groove, and the limiting groove limits the movement range of the upper and lower limiting blocks.

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