Rotary cultivator cutter arrangement structure and cutter shaft thereof

Abstract

The utility model discloses a rotary cultivator cutter arrangement structure, which comprises a cutter shaft, the cutter shaft is provided with at least N cutter groups, in 1-N-1 cutter groups, each cutter group is provided with 12 cutter magazines, the 12 cutter magazines are arranged through three spiral lines, the first spiral line is provided with 4 cutter magazines, the second spiral line is provided with 6 cutter magazines, and the first spiral line is provided with 4 cutter magazines, and the second spiral line is provided with 4 cutter magazines. The first spiral line is provided with two tool magazines, the second spiral line is provided with two tool magazines, the third spiral line is provided with two tool magazines, the three spiral lines always have only two tool magazines on the longitudinal vertical plane, the Nth group is only provided with a pair of tool magazines formed by two tool magazines, and the two tool magazines are located on the same longitudinal vertical plane; according to the utility model, the transverse and longitudinal positions of the cutters are clearly determined, so that the arrangement rule and parameters are more accurate, and smooth operation of the rotary cultivator is facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of rotary tiller technology, specifically relating to a rotary tiller blade arrangement structure and its blade shaft. Background Technology

[0002] Rotary tillers are common agricultural machines. They have the functions of breaking up the plow pan, restoring the soil structure, improving the soil's water retention capacity, eliminating some weeds, reducing pests and diseases, leveling the ground, and improving the standards of mechanized agricultural operations.

[0003] The arrangement of blades on the rotary tiller's cutter shaft is a crucial part of the machine, affecting the evenness of soil cutting, soil fragmentation, and the smoothness of the furrow bottom. Existing rotary tillers typically mount the blades on the cutter shaft via a cutter disc, as seen in patent publications CN221409699U (a rotary tiller blade) and CN203827691U (a rotary tiller cutter shaft). In these designs, the blades are mounted on the shaft via a blade holder or disc. Due to the design and installation method of the disc, the blades may experience uneven wear during operation, leading to premature wear or even breakage of some blades. The disc concentrates the blades in a longitudinal straight area, resulting in missed areas or overlapping tillage. Some rotary tillers also arrange the blades in a helical pattern on the cutter shaft, such as patent publication CN104247591A (a tiller blade assembly). In this case, the helix is ​​continuous, extending from one end of the shaft to the other. This design can easily result in inconsistent blade numbers longitudinally, leading to uneven stress distribution. Summary of the Invention

[0004] The purpose of this invention is to design a rotary tiller blade arrangement structure and its blade shaft. This design divides the rotary tiller blades on the entire blade shaft into several spiral arrangements. This design ensures that the blades are evenly distributed and the rotary tiller blades are evenly stressed, thus ensuring a balanced amount of soil cutting and optimizing the soil breaking effect and the flatness of the trench bottom.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A rotary tiller blade arrangement structure includes a blade shaft with N sets of blades. In sets 1 to N-1, each set has 12 blade magazines. The 12 blade magazines are arranged along three spiral lines. The first spiral line has 4 blade magazines, the second spiral line has 6 blade magazines, and the third spiral line has 2 blade magazines. The three spiral lines always maintain only two blade magazines in the longitudinal vertical plane. The Nth set has only a pair of blade magazines consisting of two blade magazines, and the two blade magazines are located in the same longitudinal vertical plane.

[0007] Furthermore, using the 0-360° circular cross-section of the tool axis as the criterion, the starting point of the first tool magazine of the first spiral of the first group is located between 150° and 210°, the starting point of the first tool magazine of the second spiral of the first group is located at 0°, the starting point of the first tool magazine of the third spiral of the first group is located at 20-30°, and the vertical distance between adjacent tool magazines in the same spiral is 60-70mm.

[0008] Furthermore, the first tool magazine starting point of the first spiral of the first group is located at 154°, the first tool magazine starting point of the second spiral of the first group is located at 0°, and the first tool magazine starting point of the third spiral of the first group is located at 28°.

[0009] A tool shaft is provided, wherein the tool shaft adopts a tool arrangement structure, and a tool magazine within the arrangement structure is welded or fixed to the tool shaft, and tools are installed in the tool magazine.

[0010] Furthermore, the two ends of the cutter shaft are forged and welded with splines.

[0011] The above technical solution can achieve the following beneficial effects:

[0012] This invention divides several blades into several groups. Each group of blades has three spiral lines, and the three spiral lines always maintain a distance of only two blades on the longitudinal vertical plane. This makes the spiral lines of the blades in each group independent. Compared with the existing continuous spiral lines, this invention presents an intermittent, segmented spiral line, which ensures a balanced amount of soil cutting, optimizes the soil breaking effect and the flatness of the trench bottom. The axial spacing should be reasonably planned to avoid missed tillage, while ensuring that the width of a single blade is not covered.

[0013] This invention clearly defines the lateral and longitudinal positions of the blades, making the arrangement pattern and parameters more accurate, which helps the rotary tiller operate smoothly. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the rotary tiller's blade shaft.

[0015] Figure 2 This is a schematic diagram of the first tool magazine.

[0016] Figure 3 This is a schematic diagram of tool magazines ranging from 2 to N-1.

[0017] Figure 4 This is a schematic diagram of the Nth tool magazine.

[0018] In the picture:

[0019] In the diagram: 1. Tool spindle; 2. Tool magazine. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] like Figure 1 As shown, a rotary tiller cutter shaft adopts a cutter arrangement structure. The cutter magazine 2 within the arrangement structure is welded or fixed to the cutter shaft 1 by bolts. Cutters are installed in the cutter magazine. The shaft discs at both ends of the cutter shaft are forged and welded with splines.

[0022] The tool arrangement structure is as follows:

[0023] The tool axis has at least N sets of tool groups. In groups 1 to N-1, each tool magazine has 12 tool magazines. The 12 tool magazines are arranged in three spiral lines. The first spiral line has 4 tool magazines, the second spiral line has 6 tool magazines, and the third spiral line has 2 tool magazines. The three spiral lines always maintain only two tool magazines in the longitudinal vertical plane. The Nth group has only a pair of tool magazines consisting of two tool magazines, and the two tool magazines are located in the same longitudinal vertical plane.

[0024] Figure 2 The diagram shows the unfolded state of the first group of tool magazines on the tool shaft. Using the 0-360° radius of the tool shaft cross-section as the criterion, the first group contains 12 tool magazines arranged along three spiral lines. The first spiral line contains 4 tool magazines, the second spiral line contains 6, and the third spiral line contains 2. The starting point of the first tool magazine on the first spiral line is at 154°, with subsequent points at 212.5°, 271°, and 329.5°. The starting point of the first tool magazine on the second spiral line is at 0°, with subsequent points at 58.5° and 117°. The first tool magazine starts at 28°, followed by 66.5°, with 175.5°, 234°, and 292.5°. The three spirals always maintain a pair of tool magazines on the vertical plane, with the two tool magazines forming a pair. The two tool magazines are located on the same vertical plane. The vertical spacing between adjacent tool magazines in the same spiral is 60-70 mm, specifically 65.6 mm. Corresponding to the spiral distribution mentioned above, their horizontal positions are 0, 65.6, 134.2, 202.8, 271.4, and 340 mm, respectively.

[0025] Similarly, Figure 3 The diagram shows the layout of tool magazines from group 2 to group N-1. The layout is similar to that of the first group of tool magazines, except that the horizontal spacing is different. This spacing is selected and set according to the actual tool axis length.

[0026] Figure 4 The diagram shows the layout of the Nth tool magazine, which consists of only one pair of tool magazines. The two tool magazines are located on the same vertical plane, at positions 0° and 154° respectively.

[0027] The above descriptions are all preferred embodiments of this utility model. For those skilled in the art, any modifications to this utility model in various equivalent forms without departing from the principle of this utility model shall fall within the protection scope of the appended claims.

Claims

1. A rotary tiller blade arrangement structure, comprising a blade shaft, characterized in that: The cutter shaft has N sets of cutter groups. In groups 1 to N-1, each group has 12 cutter magazines. The 12 cutter magazines are arranged by three spiral lines. The first spiral line has 4 cutter magazines, the second spiral line has 6 cutter magazines, and the third spiral line has 2 cutter magazines. The three spiral lines always maintain only two cutter magazines in the longitudinal vertical plane. The Nth group has only a pair of cutter magazines consisting of two cutter magazines, and the two cutter magazines are located in the same longitudinal vertical plane.

2. The rotary tiller blade arrangement structure according to claim 1, characterized in that: Using the 0-360° circular cross-section of the tool axis as the criterion, the starting point of the first tool magazine of the first spiral of the first group is located between 150° and 210°, the starting point of the first tool magazine of the second spiral of the first group is located at 0°, and the starting point of the first tool magazine of the third spiral of the first group is located at 20-30°. The vertical distance between adjacent tool magazines in the same spiral is 60-70mm.

3. The rotary tiller blade arrangement structure according to claim 2, characterized in that: The first tool magazine start point of the first spiral of the first group is located at 154°, the first tool magazine start point of the second spiral of the first group is located at 0°, and the first tool magazine start point of the third spiral of the first group is located at 28°.

4. A tool shaft, characterized in that: The cutter shaft adopts the cutter arrangement structure as described in claim 1, and the tool magazine within the arrangement structure is welded or fixed to the cutter shaft by bolts, with the cutter magazine containing the cutter.

5. The cutter shaft according to claim 4, characterized in that: The two ends of the cutter shaft are forged and welded with splines.

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