Mounting structure of rotary blade

Abstract

The utility model discloses a mounting structure of a rotary blade, and belongs to the field of agricultural machinery. Comprising a rotary tillage cutter shaft which rotates around the axis of the rotary tillage cutter shaft; the rotary tillage cutter is arranged on the rotary tillage cutter shaft; the mounting assembly is used for fixedly mounting the rotary blade; the mounting assembly comprises a mounting end arranged at one end of the rotary blade; the tool apron is fixedly arranged on the rotary tillage cutter shaft, and a mounting groove allowing the mounting end to be inserted therein is formed in the tool apron; the mounting hole is formed in the tool apron in a penetrating manner; the limiting hole is formed in the mounting end and is coaxial with the mounting hole; the fixing bolt is provided with a bolt cap and a bolt body, and the bolt body penetrates through the mounting hole and the limiting hole and then is provided with a nut; the limiting table is arranged on the fixing bolt; the cross section of the limiting table and the cross section of the limiting hole are of non-circular structures matched with each other in shape. The mounting structure of the rotary blade has the beneficial effect that the mounting structure of the rotary blade is prevented from loosening.

Description

Technical Field

[0001] This application relates to the field of agricultural machinery, and more specifically, to a mounting structure for rotary tillers. Background Technology

[0002] The installation of rotary tiller blades is the most important part of the entire rotary tiller assembly process, directly affecting the working time and quality. Existing rotary tiller blades are usually fixed with bolts. However, when the rotary tiller blade 1 is working, one side of the blade will be subjected to force, causing the blade to tend to rotate. This will cause the bolt preload to decrease, and the rotary tiller blade will wobble back and forth in the blade holder until the bolt loosens and the blade falls off, ultimately leading to missed tilling or damage to other rotary tiller blades. The current solution is usually to push the rotary tiller blade to the end position in the direction of force during installation to prevent it from rotating under force during operation. However, this installation method is relatively difficult to operate.

[0003] Therefore, a mounting structure for rotary tillers that prevents them from loosening is needed. Utility Model Content

[0004] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] To address the technical problems mentioned in the background section, some embodiments of this application provide a rotary tiller installation structure, including: a rotary tiller shaft that rotates around its own axis; a rotary tiller blade mounted on the rotary tiller shaft; and an installation assembly for fixing the rotary tiller blade. The installation assembly includes: an installation end located at one end of the rotary tiller blade; a blade holder fixedly mounted on the rotary tiller shaft, the blade holder having an installation groove for the installation end to be inserted into; an installation hole penetrating through both sides of the installation groove; a limiting hole located on the installation end and coaxially arranged with the installation hole; a fixing bolt having a bolt cap and a bolt body, the bolt body passing through the installation hole and the limiting hole before a nut is installed; and a limiting platform located on the fixing bolt. The limiting platform and the limiting hole have non-circular cross-sections that match their shapes.

[0006] By using the limiting platform and limiting hole, which are non-circular structures with matching shapes, when the nuts are tightened onto the fixing bolts, the rotation of the fixing bolts will cause the rotary tiller blades to rotate, thereby limiting the rotary tiller blades to a position that avoids movement under force. This ensures that the rotary tiller blades will not move under the action of external force during operation after connection, thus preventing the fixing bolts and nuts from loosening.

[0007] Furthermore, the rotary tiller has a blade side and a back side. The rotary tiller shaft rotates clockwise, and the blade side contacts and cuts the soil.

[0008] By cutting the soil with one side of the blade, the rotary tiller is subjected to a unidirectional force during operation.

[0009] Furthermore, the mounting end has a first end face and a second end face located on both sides of the axis of the fixing bolt, and the mounting groove has a first side wall and a second side wall respectively arranged opposite to the first end face and the second end face. The first end face is connected to one side of the blade back, and the second end face is connected to one side of the blade edge. The mounting end and the mounting groove are clearance fit, so that after the mounting end rotates counterclockwise around the axis of the fixing bolt by a certain angle, the first end face abuts against the first side wall, and the rotation angle is the first angle.

[0010] By setting the first end face and the first side wall, when the rotary tiller rotates counterclockwise until the first end face contacts the first side wall, the rotary tiller cannot continue to rotate. When the rotary tiller is working, the external force it receives also makes the rotary tiller tend to rotate clockwise, thereby preventing the rotary tiller from rotating under the action of the working external force.

[0011] Furthermore, the mounting holes include a round hole on one side wall of the mounting groove and a hexagonal hole on the other side of the mounting groove, with the fixing bolt cap embedded in the hexagonal hole.

[0012] The fixed bolts are limited by the hexagonal holes, thus preventing them from rotating and loosening.

[0013] Furthermore, the plane perpendicular to the axis of the fixing bolt is set as the reference plane, and the projection of the hexagonal hole on the reference plane is greater than the projection of the limiting stage on the reference plane, so that the limiting stage can pass through the hexagonal hole.

[0014] Furthermore, the hexagonal hole and the fixing bolt cap are in clearance fit. The maximum size of the projection of the fixing bolt cap on the reference plane is greater than the minimum size of the projection of the hexagonal hole on the reference plane, so that the cap can rotate counterclockwise within the hexagonal hole by a certain angle, which is the second angle.

[0015] The set cap can rotate a certain angle, so that when the installation nut is rotated counterclockwise to pre-tighten, it will drive the bolt to rotate a certain angle, causing the rotary tiller to rotate at the first angle, thus limiting the rotation of the rotary tiller.

[0016] Furthermore, a washer is fitted onto the fixing bolt between the nut and the tool holder.

[0017] The washer prevents the nut from loosening by rotating on its own.

[0018] Furthermore, the limiting hole is a hexagonal hole, and the limiting platform is a hexagonal platform, so that the rotary tiller blade and the fixing bolt rotate synchronously.

[0019] Furthermore, the first angle is smaller than the second angle.

[0020] When the fixing bolt is rotated, the rotary tiller blade can rotate counterclockwise by a first angle to ensure that the first end face abuts against the first side wall.

[0021] The beneficial effect of this application is that it provides a mounting structure for preventing the rotary tiller blades from becoming loose. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0023] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0024] In the attached diagram:

[0025] Figure 1 This is an overall schematic diagram according to one embodiment of the present application;

[0026] Figure 2 yes Figure 1 A side view of the embodiment;

[0027] Figure 3 yes Figure 1 Cross-sectional schematic diagram of the embodiment;

[0028] Figure 4 yes Figure 1 The installation diagram of the embodiment is shown below.

[0029] Figure label:

[0030] 100. Rotary tiller shaft; 101. Rotary tiller blade; 102. Mounting end; 103. Blade holder; 104. Mounting hole; 105. Limiting hole; 106. Fixing bolt; 107. Limiting platform; 108. Blade edge side; 109. Blade back side; 110. Mounting groove; 111. Nut; 112. Second side wall; 113. First end face; 114. Second end face; 115. First side wall. Detailed Implementation

[0031] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0032] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0033] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0034] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0035] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] Reference Figure 1-4 A rotary tiller blade mounting structure includes: a rotary tiller shaft 100, a rotary tiller blade 101, a mounting end 102, a blade holder 103, a mounting hole 104, a limiting hole 105, a fixing bolt 106, and a limiting platform 107. The rotary tiller blade 101 has a cutting edge side 108 and a back edge side 109. The rotary tiller shaft 100 rotates clockwise, and the cutting edge side 108 contacts and cuts the soil. In one embodiment, the blade holder 103 is fixedly mounted on the rotary tiller shaft 100. The blade holder 103 has a mounting groove 110 for the mounting end 102 to be inserted into, and the mounting groove 110 has an opening in the radial direction of the rotary tiller shaft 100. The mounting end 102 is located at one end of the rotary tiller blade 101 and is inserted into the mounting groove 110 along the opening for installation. The blade holder 103 has a through mounting hole 104, and the mounting end 102 has a limiting hole 105 coaxially arranged with the mounting hole 104. After the bolt passes through the mounting hole 104 and the limiting hole 105, the nut 111 is installed to fix the rotary tiller 101. A washer is fitted on the fixing bolt 106 between the nut 111 and the blade holder 103.

[0037] In another embodiment, a limiting platform 107 is provided on the fixing bolt 106. The limiting platform 107 and the limiting hole 105 have non-circular cross-sections that match their shapes. Preferably, the limiting hole 105 is a hexagonal hole, and the limiting platform 107 is a hexagonal platform. During installation, the bolt and the rotary tiller 101 rotate synchronously under the action of the limiting platform 107 and the limiting hole 105. The mounting end 102 has a first end face 113 and a second end face 114 located on both sides of the axis of the fixing bolt 106. Meanwhile, the mounting groove 110 has a first side wall 115 and a second side wall 112 respectively disposed opposite to the first end face 113 and the second end face 114. The first end face 113 is connected to the back of the blade 109, and the second end face 114 is connected to the cutting edge 108. The mounting end 102 and the mounting groove 110 are clearance fit, so that after the mounting end 102 rotates counterclockwise around the axis of the fixing bolt 106 by a certain angle, the first end face 113 abuts against the first side wall 115. The rotation angle is the first angle.

[0038] Mounting hole 104 includes a circular hole on one side wall of mounting groove 110 and a hexagonal hole on the other side of mounting groove 110. Fixing bolt 106 has a cap and a body. The body passes through mounting hole 104 and limiting hole 105 to install nut 111. The cap of fixing bolt 106 is embedded in the hexagonal hole. The hexagonal hole and the cap of fixing bolt 106 are clearance-fitted. The maximum projection size of the cap of fixing bolt 106 on the reference plane is greater than the minimum projection size of the hexagonal hole on the reference plane, allowing the cap to rotate counterclockwise by a certain angle within the hexagonal hole. This rotation angle is a second angle. The first angle is smaller than the second angle.

[0039] When the nut 111 is tightened on the fixing bolt 106, it rotates counterclockwise, causing the bolt to rotate counterclockwise. The fixing bolt 106 cap rotates counterclockwise to a second angle within the hexagonal hole. The rotary tiller 101 rotates synchronously with the fixing bolt 106, causing the rotary tiller 101 to rotate to a first angle. Since the first angle is smaller than the second angle, the first end face 113 of the mounting end 102 abuts against the first side wall 115 and generates a preload. At this time, the rotary tiller 101 cannot rotate counterclockwise around the bolt axis. The nut 111 continues to rotate and tighten, preventing the blade side 108 of the rotary tiller 101 from being stressed during operation, which would cause the rotary tiller 101 to rotate counterclockwise and loosen the connection between the nut 111 and the fixing bolt 106. A washer is fitted on the fixing bolt 106 between the nut 111 and the blade holder 103.

[0040] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A mounting structure for rotary tillers, characterized in that, include: The rotary tiller shaft (100) rotates around its own axis during operation; Rotary tillage blades (101) are mounted on the rotary tillage blade shaft (100); Mounting components are used to securely mount the rotary tiller blades (101); The installation components include: The mounting end (102) is located at one end of the rotary tiller (101); The blade holder (103) is fixedly mounted on the rotary tiller shaft (100), and the blade holder (103) has a mounting groove (110) for the mounting end (102) to be inserted. Mounting hole (104) is provided through the tool holder (103); A limiting hole (105) is provided on the mounting end (102) and is coaxially arranged with the mounting hole (104); The fixing bolt (106) has a bolt cap and a bolt body. The bolt body passes through the mounting hole (104) and the limiting hole (105) and then a nut (111) is installed. The limiting platform (107) is mounted on the fixing bolt (106); Among them, the cross-sections of the limiting platform (107) and the limiting hole (105) are non-circular structures with matching shapes.

2. The mounting structure for rotary tillers according to claim 1, characterized in that: The rotary tiller (101) has a blade side (108) and a back side (109). The rotary tiller shaft (100) rotates clockwise, and the blade side (108) contacts and cuts the soil.

3. The mounting structure for rotary tillers according to claim 2, characterized in that: The mounting end (102) has a first end face (113) and a second end face (114) located on both sides of the axis of the fixing bolt (106). The mounting groove (110) has a first side wall (115) and a second side wall (112) respectively arranged opposite to the first end face (113) and the second end face (114). The first end face (113) is connected to one side of the back of the blade (109), and the second end face (114) is connected to one side of the blade edge (108). The mounting end (102) and the mounting groove (110) are in clearance fit, so that after the mounting end (102) rotates counterclockwise around the axis of the fixing bolt (106) by a certain angle, the first end face (113) abuts against the first side wall (115). The rotation angle is the first angle.

4. The mounting structure for rotary tillers according to claim 1, characterized in that: The mounting hole (104) includes a round hole on one side wall of the mounting groove (110) and a hexagonal hole on the other side of the mounting groove (110), and the cap of the fixing bolt (106) is embedded in the hexagonal hole.

5. The mounting structure for rotary tillers according to claim 4, characterized in that: The plane perpendicular to the axis of the fixing bolt (106) is set as the reference plane. The projection of the hexagonal hole on the reference plane is greater than the projection of the limiting platform (107) on the reference plane, so that the limiting platform (107) can pass through the hexagonal hole.

6. The mounting structure for rotary tillers according to claim 5, characterized in that: The hexagonal hole and the fixing bolt (106) cap are in clearance fit. The maximum size of the projection of the fixing bolt (106) cap on the reference plane is greater than the minimum size of the projection of the hexagonal hole on the reference plane, so that the cap can rotate counterclockwise within the hexagonal hole by a certain angle, which is the second angle.

7. The mounting structure for rotary tillers according to claim 1, characterized in that: A washer is fitted on the fixing bolt (106) between the nut (111) and the tool holder (103).

8. The mounting structure for rotary tillers according to claim 1, characterized in that: The limiting hole (105) is a hexagonal hole, and the limiting platform (107) is a hexagonal platform, so that the rotary tiller (101) and the fixing bolt (106) rotate synchronously.

9. The mounting structure for a rotary tiller blade according to claim 1, characterized in that: The first angle is smaller than the second angle.

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