Tensioning wheel structure for field returning machine and field returning machine

Abstract

The utility model provides a tensioning wheel structure for a field returning machine and the field returning machine. The tensioning wheel structure for the field returning machine comprises a tensioning wheel. The returning machine side wall is arranged on the first side of the tensioning wheel; the shield side plate is arranged on the second side of the tensioning wheel; the mounting shaft is arranged on the side wall of the returning machine and the tensioning wheel in a penetrating manner; and the locknut is arranged at the end part, close to the side wall of the returning machine, of the mounting shaft. The tensioning wheel structure for the field returning machine and the field returning machine can solve the problem that the strength of a side plate of a protective cover is reduced or the returning missing distance of the field returning machine is increased due to the installation mode of an existing tensioning wheel.

Description

Technical Field

[0001] The present application relates to the technical field of tension pulleys, and in particular to a tension pulley structure for a straw returning machine and a straw returning machine. Background Art

[0002] With the transformation of China's economic development concept, the method of returning straw to the field by burning it after corn harvesting has become history, and comminuting and returning it to the field has become an inevitable requirement after corn harvesting.

[0003] At present, the transmission side of the straw returning machines on the market is relatively wide, and there is often a problem of missed straw returning. In addition to the width that the transmission belt pulley must occupy, most of the reason for the width of the straw returning machine exceeding the width required by the transmission belt pulley is the installation method of the tension pulley.

[0004] The locknut of the tension pulley of the straw returning machines on the market is usually installed on the outside of the tension pulley bracket. This leads to a large notch being opened on the side plate of the guard cover to avoid the movement track direction, or the side plate of the guard cover is moved outward. If an opening is made on the side plate of the guard cover, the reliability of the guard cover will be reduced, and the probability of pushing the straw will be increased. Moving the side plate of the guard cover outward will increase the missed straw returning distance of the straw returning machine. Summary of the Utility Model

[0005] In view of this, the purpose of the present application is to provide a tension pulley structure for a straw returning machine and a straw returning machine, so as to solve the problem that the existing installation method of the tension pulley will reduce the strength of the side plate of the guard cover or increase the missed straw returning distance of the straw returning machine.

[0006] According to the first aspect of the present utility model, there is provided a tension pulley structure for a straw returning machine, wherein the tension pulley structure for the straw returning machine includes: a tension pulley; a side wall of the straw returning machine, provided on a first side of the tension pulley; a side plate of the guard cover, provided on a second side of the tension pulley; a mounting shaft, passing through the side wall of the straw returning machine and the tension pulley; and a locknut, provided at an end of the mounting shaft close to the side wall of the straw returning machine.

[0007] Preferably, the side wall of the straw returning machine is provided with an avoidance hole at a position corresponding to the movement track of the locknut.

[0008] Preferably, the tension pulley structure for the straw returning machine further includes a tension pulley bracket, and the tension pulley bracket includes: a first side plate, provided between an end of the mounting shaft close to the side plate of the guard cover and the tension pulley, a first through hole is opened on the first side plate, and the mounting shaft passes through the first through hole; and a second side plate, provided between the locknut and the tension pulley, a second through hole is opened on the second side plate, and the mounting shaft passes through the second through hole.

[0009] Preferably, the tensioning wheel structure for the rotary tiller further includes: a first bearing disposed at an end of the tensioning wheel near the first side plate; and a second bearing disposed at an end of the tensioning wheel near the second side plate.

[0010] Preferably, a first bushing is disposed between the first bearing and the first side plate, and an outer diameter of the first bushing is smaller than a diameter of the first through hole.

[0011] Preferably, a second bushing is disposed between the second bearing and the second side plate, and an outer diameter of the second bushing is larger than a diameter of the second through hole.

[0012] Preferably, a third bushing is disposed between the first bearing and the second bearing, and the mounting shaft passes through the third bushing.

[0013] Preferably, a sum of axial dimensions of the first bushing, the second bushing, the third bushing, the first bearing, and the second bearing is larger than a distance between the first side plate and the second side plate.

[0014] Preferably, an oil cup is disposed at an end of the mounting shaft near the shield side plate, a diameter of the oil cup is larger than a diameter of the first through hole, and a part of the oil cup extends into the first through hole to abut against the first bushing.

[0015] According to a second aspect of the present invention, there is provided a rotary tiller, wherein the rotary tiller includes the tensioning wheel structure for the rotary tiller as described above.

[0016] For the tensioning wheel structure for the rotary tiller and the rotary tiller according to the embodiments of the present invention, a side wall of the rotary tiller is disposed on a first side of the tensioning wheel. A shield side plate is disposed on a second side of the tensioning wheel. The mounting shaft passes through the side wall of the rotary tiller and the tensioning wheel. A locknut is disposed at an end of the mounting shaft near the side wall of the rotary tiller. Since the shield side plate is the outermost side of the rotary tiller when designing the rotary tiller, the left-right relative relationship between the shield side plate and the outermost tensioning wheel of the cutter bar is often used as a standard during design. Installing the locknut at an end of the mounting shaft near the side wall of the rotary tiller will not affect the strength of the side wall of the rotary tiller, and the side wall of the rotary tiller can be moved towards the shield side plate, reducing the distance between the shield side plate and the side wall of the rotary tiller, thereby increasing the effective tilling size of the rotary tiller. In this way, the problem that the existing installation method of the tensioning wheel reduces the strength of the shield side plate or increases the missed tilling distance of the rotary tiller can be effectively solved.

[0017] To make the above objects, features, and advantages of the present application more obvious and understandable, the following specific embodiments are given and described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of a tension wheel structure for a rotary tiller and a rotary tiller according to the present utility model.

[0020] Figure 2 It is a schematic diagram of the tension wheel structure for a rotary tiller according to the present utility model.

[0021] Figure 3 It is a schematic diagram of the tension wheel structure for a rotary tiller from another angle according to the present utility model.

[0022] Reference numerals: 1 - tension wheel; 2 - side wall of the rotary tiller; 3 - side plate of the protective cover; 4 - mounting shaft; 5 - locknut; 6 - tension wheel bracket; 61 - first side plate; 62 - second side plate; 71 - first bearing; 72 - second bearing; 81 - first bushing; 82 - second bushing; 83 - third bushing; 9 - oil cup. Detailed implementation manners

[0023] The following detailed implementation manners are provided to help readers obtain a comprehensive understanding of the methods, devices, and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example and is not limited to the order set forth herein. Rather, changes that will be apparent after understanding the disclosure of the present application can be made, except for operations that must occur in a specific order. In addition, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

[0024] The features described herein can be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, devices, and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0025] Throughout the specification, when an element such as a layer, region, or substrate is described as being "on" another element, "connected to" another element, "coupled to" another element, "above" another element, or "covering" another element, it can be directly "on" the other element, "connected to" the other element, "coupled to" the other element, "above" the other element, or "covering" the other element, or there can be one or more other elements intervening between them. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly coupled to" another element, "directly above" another element, or "directly covering" another element, there can be no other elements intervening between them.

[0026] As used herein, the term "and / or" includes any one of the listed related items and any combination of any two or more of them.

[0027] Although terms such as "first", "second", and "third" may be used herein to describe various components, elements, regions, layers, or parts, these components, elements, regions, layers, or parts are not limited by these terms. Rather, these terms are only used to distinguish one component, element, region, layer, or part from another. Thus, the first component, element, region, layer, or part described in the examples herein may also be referred to as the second component, element, region, layer, or part without departing from the teachings of the examples.

[0028] For ease of description, spatial relationship terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another as shown in the figures. Such spatial relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "above" or "upper" relative to another element will then be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientation of "above" and "below" depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relationship terms used herein will be interpreted accordingly.

[0029] The terms used herein are for the purpose of describing various examples only and are not intended to limit the examples. Unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. The terms "comprising," "including," and "having" enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof that exist, but do not preclude the existence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0030] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Accordingly, the examples described herein are not limited to the specific shapes shown in the drawings, but include changes in shape that occur during manufacturing.

[0031] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of this application. In addition, although the examples described herein have a variety of configurations, other configurations are possible, as will be apparent after understanding the disclosure of this application.

[0032] The utility model provides a tension wheel structure for a rotary tiller, as Figures 1 to 3 shown, the tension wheel structure for the rotary tiller includes a tension wheel 1, a side wall 2 of the rotary tiller, a guard side plate 3, a mounting shaft 4, and a locknut 5.

[0033] As Figures 1 to 3 shown, according to a first aspect of the utility model, a tension wheel structure for a rotary tiller is provided, the tension wheel structure for the rotary tiller includes a tension wheel 1, a side wall 2 of the rotary tiller, a guard side plate 3, a mounting shaft 4, and a locknut 5.

[0034] In the following description, reference will be made to Figures 1 to 3 specifically describe the specific structures of the above components of the tension wheel structure for the rotary tiller and the connection relationships of the above components.

[0035] As Figures 1 to 3 shown, in an embodiment, the side wall 2 of the rotary tiller can be disposed on a first side of the tension wheel 1 (which can be the left side as Figure 1 shown, i.e., the inner side of the rotary tiller). The guard side plate 3 can then be disposed on a second side of the tension wheel 1 (which can be as Figure 1On the right side shown, i.e., the outside of the rotary tiller). The mounting shaft 4 can pass through the side wall 2 of the rotary tiller and the tension pulley 1. The locknut 5 can be arranged at the end of the mounting shaft 4 close to the side wall 2 of the rotary tiller. Since when designing the rotary tiller, the shield side plate 3 is the outermost side of the rotary tiller, the left-right relative relationship between the shield side plate and the outermost tension pulley of the cutter bar is often used as the standard during design. Installing the locknut 5 at the end of the mounting shaft 4 close to the side wall 2 of the rotary tiller will not affect the strength of the side wall 2 of the rotary tiller, and the side wall 2 of the rotary tiller can be moved towards the shield side plate 3 to reduce the distance between the shield side plate 3 and the side wall 2 of the rotary tiller, thereby increasing the effective tilling size of the rotary tiller.

[0036] Preferably, as Figures 1 to 3 shown, in the embodiment, the side wall 2 of the rotary tiller can be provided with an avoidance hole at the position corresponding to the movement track of the locknut 5 to avoid scraping with the locknut 5.

[0037] Preferably, as Figures 1 to 3 shown, in the embodiment, the tension pulley structure for the rotary tiller can further include a tension pulley bracket 6. Specifically, the tension pulley bracket 6 can include a first side plate 61 and a second side plate 62, and the first side plate 61 can be arranged in parallel with the second side plate 62. Among them, the first side plate 61 can be arranged between the end of the mounting shaft 4 close to the shield side plate 3 and the tension pulley 1. A first through hole can be opened on the first side plate 61, and the mounting shaft 4 can pass through the first through hole. The mounting shaft 4 can be perpendicular to the first side plate 61. The second side plate 62 can be arranged between the locknut 5 and the tension pulley 1. A second through hole can be opened on the second side plate 62, and the mounting shaft 4 can pass through the second through hole. The mounting shaft 4 can be perpendicular to the second side plate 62 at the same time.

[0038] Preferably, as Figures 1 to 3 shown, in the embodiment, the tension pulley structure for the rotary tiller can further include a first bearing 71 and a second bearing 72. Among them, the first bearing 71 can be installed at the end of the tension pulley 1 close to the first side plate 61 inside. The second bearing 72 can be arranged at the end of the tension pulley 1 close to the second side plate 62 inside. The tension pulley 1 is rotatably connected to the mounting shaft 4 through the first bearing 71 and the second bearing 72.

[0039] Preferably, as Figures 1 to 3 shown, in the embodiment, a second shaft sleeve 82 is arranged between the second bearing 72 and the second side plate 62, and the outer diameter of the second shaft sleeve 82 can be greater than the aperture of the second through hole, so that the second shaft sleeve 82 will not come out from the second through hole.

[0040] Furthermore, preferably, as Figures 1 to 3As shown, in the embodiment, a first bushing 81 may be provided between the first bearing 71 and the first side plate 61. The outer diameter of the first bushing 81 may be smaller than the aperture of the first through-hole, such that the first bushing 81 can be inserted through the first through-hole. With such a setting, it is easy to install the first bushing 81 inside the tension pulley bracket 6. That is, during the assembly process, only the second bushing 82 and the tension pulley 1 need to be placed inside the tension pulley bracket 6 simultaneously, and there will naturally be a space for installing the first bushing 81. The first bushing 81 can be directly sleeved on the mounting shaft 4. When installing the mounting shaft 4, the first bushing 81 will pass through the first through-hole on the first side plate 61, thereby completing the assembly.

[0041] More preferably, as Figures 1 to 3 shown, in the embodiment, an oil cup 9 may be provided at the end of the mounting shaft 4 close to the shroud side plate 3. Specifically, the oil cup 9 may be formed as a cylindrical structure, and a stepped portion is formed at the end of the oil cup 9 close to the tension pulley 1 (i.e., the diameter at the end of the tension pulley 1 changes). The diameter (the largest part) of the oil cup 9 is larger than the aperture of the first through-hole to cooperate with the locknut 5 to tighten the mounting shaft 4. The oil cup 9 may partially extend into the first through-hole (i.e., the stepped portion extends into the first through-hole) and abuts against the first bushing 81, thereby positioning the first bushing 81.

[0042] In addition, preferably, as Figures 1 to 3 shown, in the embodiment, a third bushing 83 may also be provided between the first bearing 71 and the second bearing 72, and the mounting shaft 4 may be inserted through the third bushing 83. Further preferably, the sum of the axial dimensions of the first bushing 81, the second bushing 82, the third bushing 83, the first bearing 71, and the second bearing 72 may be greater than the distance between the first side plate 61 and the second side plate 62. With such a setting, deformation of the tension pulley bracket 6 during assembly can be avoided.

[0043] In addition, according to the second aspect of the present invention, a rotary tiller is provided, and the rotary tiller includes the tension pulley structure for the rotary tiller as described above. The technical effects of the rotary tiller including the above-mentioned tension pulley structure for the rotary tiller will not be elaborated here.

[0044] Finally, it should be noted that the above-described embodiments are only specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, rather than limiting it. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that any person skilled in the art within the technical scope disclosed by the present application can still modify the technical solutions recorded in the foregoing embodiments or can easily think of changes, or make equivalent replacements for some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A tension wheel structure for a rotary tiller, characterized in that, The tensioning wheel structure for the rotary tiller includes: A tensioning wheel; The side wall of the rotary tiller, provided on the first side of the tensioning wheel; The guard side plate, provided on the second side of the tensioning wheel; An installation shaft, passing through the side wall of the rotary tiller and the tensioning wheel; and A locknut, provided at the end of the installation shaft close to the side wall of the rotary tiller.

2. The tension pulley structure for a straw returning machine according to claim 1, characterized in that A relief hole is provided on the side wall of the rotary tiller at the position corresponding to the movement track of the locknut.

3. The tension wheel structure for a straw returning machine according to claim 1, characterized in that, The tensioning wheel structure for the rotary tiller further includes a tensioning wheel bracket, and the tensioning wheel bracket includes: A first side plate, provided between the end of the installation shaft close to the guard side plate and the tensioning wheel. A first through hole is provided on the first side plate, and the installation shaft passes through the first through hole; and A second side plate, provided between the locknut and the tensioning wheel. A second through hole is provided on the second side plate, and the installation shaft passes through the second through hole.

4. The tension wheel structure for a rotary tiller according to claim 3, characterized in that, The tensioning wheel structure for the rotary tiller further includes: A first bearing, provided at the end of the tensioning wheel close to the first side plate; and A second bearing, provided at the end of the tensioning wheel close to the second side plate.

5. The tension wheel structure for a straw returning machine according to claim 4, characterized in that, A first bushing is provided between the first bearing and the first side plate, and the outer diameter of the first bushing is smaller than the aperture of the first through hole.

6. The tensioning wheel structure for a straw returning machine according to claim 5, characterized in that, A second bushing is provided between the second bearing and the second side plate, and the outer diameter of the second bushing is larger than the aperture of the second through hole.

7. The tension wheel structure for a straw returning machine according to claim 6, characterized in that, A third bushing is provided between the first bearing and the second bearing, and the installation shaft passes through the third bushing.

8. The tension wheel structure for a straw returning machine according to claim 7, characterized in that, The sum of the axial dimensions of the first bushing, the second bushing, the third bushing, the first bearing and the second bearing is greater than the distance between the first side plate and the second side plate.

9. The tensioning wheel structure for a straw returning machine according to claim 8, wherein, An oil cup is provided at the end of the installation shaft close to the guard side plate. The diameter of the oil cup is larger than the aperture of the first through hole, and the oil cup partially extends into the first through hole and abuts against the first bushing.

10. A soil conditioner, characterized in that, The rotary tiller includes the tensioning wheel structure for the rotary tiller according to any one of claims 1 to 9.

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