Rotary threshing device rotating shaft main body structure

Abstract

The utility model belongs to the technical field of sorting in agricultural operation transportation, specifically relates to a rotary threshing device rotating shaft main part structure, including the rotating cylinder body of cylindrical, the coaxial suspension inner tube is equipped with in rotating cylinder body interval, is equipped with the elastic member between suspension inner tube and rotating cylinder body, and the elastic member is used for the elastic support connection of suspension inner tube in rotating cylinder body, the suspension inner tube is uniformly distributed with a plurality of threshing blades on the circumference, and the threshing blade extends out rotating cylinder body in the radial direction, and the free end of the threshing blade is provided with the accommodation slot that lets out in the wall of rotating cylinder body correspondingly penetrates and sets up. The rotating cylinder body is used as the rotating main body, drives the suspension inner tube that is elastically supported and connected in rotating cylinder body through the elastic member, and the suspension inner tube can be appropriately let in, thereby optimizing the stress state of rotating shaft, the rotation of rotating shaft is beneficial, avoids the problem that the rigid rolling threshing of crops between outer cylinder and rotating shaft affects the service life of device, reduces the phenomenon that the grain is excessively extruded and is broken.

Description

Technical Field

[0001] This utility model belongs to the technical field of sorting in agricultural operations and transportation, and specifically relates to the main structure of the rotating shaft of a rotary threshing device. Background Technology

[0002] Combine harvesters consist of multiple functional units that move crops within the equipment. They can perform various functions such as cutting, separating ears of grain, separating husks, and discharging grain, as well as transporting crops between these units. They are highly integrated and suitable for large-scale grain harvesting operations. The rotary threshing unit in the combine harvester separates the grains from the ears of grain. The rotary threshing unit has an outer cylinder with internal transverse channels. Inside the outer cylinder is a rotating conveyor. Combined with the rotation of the rotating conveyor, the cut grains enter from the inlet end and are crushed by the relative rotation of the inner and outer walls of the outer cylinder and the rotating conveyor. The grains detach from the ears and fall through the sieve-like mesh on the outer cylinder, achieving separation and threshing. The stalks of the separated grains are then discharged from the outlet end. In current rotary threshing units, the process of gradually conveying, crushing, and threshing crops between the outer cylinder and the rotary conveyor is basically a rigid contact (see CN112547474A). However, the crops are not uniformly distributed circumferentially between the outer cylinder and the rotary conveyor. For example, due to gravity, the crops may be more concentrated in the lower circumferential position between the outer cylinder and the rotary conveyor. The rotary conveyor is subjected to uneven radial forces for a long time, which may affect the service life of the rotary conveyor and the outer cylinder. It may also cause some threshed grains to be over-compressed and break. In view of the above, there is an urgent need to further improve and optimize the relevant structural design. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a rotating shaft main structure for a rotary threshing device, so as to avoid the problem of crops being rigidly crushed and threshed between the outer cylinder and the rotating shaft conveyor, which affects the service life of the device, thereby achieving optimized stress conditions and improving service life.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The main structure of the rotary threshing device includes a cylindrical rotating cylinder; coaxial suspended inner cylinders are spaced apart inside the rotating cylinder, and an elastic element is provided between the suspended inner cylinder and the rotating cylinder, the elastic element being used to elastically support and connect the suspended inner cylinder to the rotating cylinder; a plurality of threshing blades are evenly distributed circumferentially on the suspended inner cylinder, and the threshing blades extend radially outward from the rotating cylinder; corresponding clearance grooves are provided through the wall of the rotating cylinder to allow the free ends of the threshing blades to extend out.

[0005] To further improve the above technical solution, the threshing blades extend along the axial direction of the rotating cylinder and the suspended inner cylinder, the axial length of the threshing blades is less than the length of the rotating cylinder, and both ends of the threshing blades are located within the two ends of the rotating cylinder.

[0006] Furthermore, the threshing blades are detachably connected to the suspended inner cylinder.

[0007] Furthermore, the elastic element includes two spring units respectively disposed between the two ends of the rotating cylinder and the suspended inner cylinder. Each spring unit includes at least three circumferentially distributed helical compression springs, which are compressed between the outer wall of the suspended inner cylinder and the inner wall of the rotating cylinder.

[0008] Furthermore, the two ends of the helical compression spring rest in the mounting base, and one side of the mounting base has an annular mounting groove for the ends of the helical compression spring to enter; the outer wall of the suspended inner cylinder and the inner wall of the rotating cylinder are respectively provided with assembly blind holes, and the mounting bases at both ends of the helical compression spring are respectively placed in the assembly blind holes on the outer wall of the suspended inner cylinder and the inner wall of the rotating cylinder.

[0009] Furthermore, the outer wall of the rotating cylinder is provided with a pair of disassembly holes that extend through to the assembly blind holes.

[0010] Furthermore, the threshing blades are long and straight.

[0011] Alternatively, the threshing blades may be spiral-shaped.

[0012] Alternatively, the threshing blades may have columnar protrusions.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The main structure of the rotary threshing device of this utility model is a rotating cylinder. The rotating cylinder serves as the main rotating body. Through an elastic element, it drives a suspended inner cylinder that is elastically supported and connected to the rotating cylinder. Threshing blades with clearance grooves on the rotating cylinder extend freely from the suspended inner cylinder. During use, these blades are used to crush and thresh crops. When the crops are unevenly distributed circumferentially between the outer cylinder and the rotating shaft, for example, due to gravity, the crops are more concentrated in the lower circumferential position between the outer cylinder and the rotating shaft. The threshing blades in the corresponding position are subjected to greater force. This allows the suspended inner cylinder to make appropriate upward clearance in the radial direction, thereby optimizing the stress state of the rotating shaft, facilitating its rotation, and avoiding the problem of rigid crushing and threshing of crops between the outer cylinder and the rotating shaft affecting the service life of the device. This achieves the effect of optimizing the stress state and improving the service life.

[0014] 2. The rotating shaft structure of the rotary threshing device of this utility model, after practical comparison, has little impact on the actual threshing rate, but can effectively reduce the situation where the threshed grains are excessively squeezed and broken. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the rotating shaft of the rotary threshing device in an embodiment. Figure 2 for Figure 1 Side view; Figure 3 A perspective view of the main structure of the rotating shaft of the rotary threshing device in an embodiment; Figure 4 For Figure 1 A schematic diagram with the threshing blades hidden (to show the connection between the inner and outer cylinders); Figure 5 A separate schematic diagram of the rotating cylinder in the main structure of the rotary threshing device of the embodiment; Figure 6 A separate schematic diagram of the suspended inner cylinder in the main structure of the rotary threshing device in the embodiment; Figure 7 for Figure 1 A partial schematic diagram of the AA section (enlarged); Figure 8 When using spiral threshing blades as an example, an additional end plug is provided; Figure 9 This is a schematic diagram of the main structure of the rotary threshing device in an embodiment, showing the connection between the front and rear rotating shafts. The components include a rotating cylinder 30, a clearance groove 31, an assembly blind hole 32, a disassembly hole 33, a plug 34, a suspended inner cylinder 35, threshing blades 36, a connecting column 37, an elastic element 38, a spiral compression spring 39, a mounting base 40, and an annular mounting groove 41. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0017] Please see Figures 1-5 The main structure of the rotary threshing device in a specific embodiment includes a cylindrical rotating cylinder 30; coaxial suspended inner cylinders 35 are spaced apart inside the rotating cylinder 30, and an elastic element 38 is provided between the outer wall of the suspended inner cylinder 35 and the inner wall of the rotating cylinder 30. The elastic element 38 is used to elastically support and connect the suspended inner cylinder 35 inside the rotating cylinder 30; a plurality of threshing blades 36 are evenly distributed circumferentially on the suspended inner cylinder 35, and the threshing blades 36 extend outward from the rotating cylinder 30 in the radial direction; and a clearance groove 31 is correspondingly provided through the wall of the rotating cylinder 30 for the free ends of the threshing blades 36 to extend out.

[0018] In this embodiment, the rotating shaft main structure uses a rotating cylinder 30 as the rotating body. An elastic element 38 drives a suspended inner cylinder 35, which is elastically supported and connected within the rotating cylinder 30. Threshing blades 36 extend freely from the suspended inner cylinder 35, extending from the clearance groove 31 on the rotating cylinder 30. During use, these blades are used to crush and thresh crops. When the crops are unevenly distributed circumferentially between the outer cylinder and the rotating shaft—for example, due to gravity, the crops are more concentrated in the lower circumferential position between the outer cylinder and the rotating shaft—the threshing blades 36 in that position experience greater force. This allows the suspended inner cylinder 35 to appropriately clearance upwards in the radial direction, thereby optimizing the stress state of the rotating shaft, facilitating its rotation, and preventing the rigid crushing and threshing of crops between the outer cylinder and the rotating shaft from affecting the device's service life. This achieves optimized stress distribution and improved service life. In practice, the elastic element 38 can be in the form of a rubber sleeve, a metal spring, or other similar implementations.

[0019] The threshing blades 36 extend axially along the rotating cylinder 30 and the suspended inner cylinder 35. The axial length of the threshing blades 36 is less than the length of the rotating cylinder 30, and both ends of the threshing blades 36 are located within the ends of the rotating cylinder 30. Correspondingly, the clearance grooves 31 are also located within the ends of the rotating cylinder 30, not penetrating the ends of the rotating cylinder 30, maintaining the integrity and structural strength of the rotating cylinder 30, and also ensuring the effective working length of the threshing blades 36. In implementation, both ends of the suspended inner cylinder 35 are preferably also located within the ends of the rotating cylinder 30, so that the ends of the rotating cylinder 30 can be connected to the front and rear rotating shafts. See [reference needed]. Figure 9 The height by which the free end of the threshing blade 36 extends beyond the rotating cylinder 30 is approximately equal to, or slightly larger than, the radial gap on one side between the rotating cylinder 30 and the suspended inner cylinder 35.

[0020] Please see Figure 1 and Figure 4 In this embodiment, the elastic element 38 is in the form of a metal spring. The elastic element 38 includes two spring units respectively disposed between the two ends of the rotating cylinder 30 and the suspended inner cylinder 35. The spring unit includes at least three circumferentially distributed helical compression springs 39 arranged radially along the rotating cylinder 30 and the suspended inner cylinder 35. The helical compression springs 39 are compressed between the outer wall of the suspended inner cylinder 35 and the inner wall of the rotating cylinder 30.

[0021] Please see further. Figures 5-7 The two ends of the helical compression spring 39 rest within the mounting base 40. One surface of the mounting base 40 has an annular mounting groove 41 for the ends of the helical compression spring 39 to enter. Assembly blind holes 32 are respectively provided on the outer wall of the suspended inner cylinder 35 and the inner wall of the rotating cylinder 30. The mounting bases 40 at both ends of the helical compression spring 39 are respectively placed within the assembly blind holes 32 on the outer wall of the suspended inner cylinder 35 and the inner wall of the rotating cylinder 30. The height of the mounting base 40 is approximately equal to or slightly higher than the depth of the assembly blind hole 32.

[0022] This facilitates the elastic support connection of the suspended inner cylinder 35 within the rotating cylinder 30, ensuring stability and reliability during use. During operation, the suspended inner cylinder 35, elastically supported within the rotating cylinder 30, is rotated via the helical compression spring 39. The extension and retraction of the helical compression spring 39 allows the suspended inner cylinder 35 to float and yield, while also bearing the circumferential torque that drives its rotation. If the stiffness in bearing and transmitting torque is insufficient, the diameter of the helical compression spring can be appropriately increased, or the number of circumferentially distributed helical compression springs 39 included in the spring unit can be increased.

[0023] The rotating cylinder 30 has a pair of disassembly holes 33 on its outer wall, each leading to a blind assembly hole 32. During disassembly, the mounting seat 40, which falls into the blind assembly hole 32, can be pushed out through the disassembly hole 33, facilitating the disassembly process. The disassembly hole 33 is coaxial with the corresponding blind assembly hole 32. The inner diameter of the disassembly hole 33 is smaller than that of the blind assembly hole 32, i.e., smaller than the cross-sectional area of ​​the mounting seat 40, thus not affecting the installation stability of the mounting seat 40 within the blind assembly hole 32. To prevent foreign objects from squeezing the mounting seat 40 during use and affecting its stability, the disassembly hole 33 can be machined with an internal thread, and a plug 34 can be threaded onto the thread to improve daily protection.

[0024] The threshing blades 36 are detachably connected to the suspended inner cylinder 35. The threshing blades 36 can be conventionally straight and elongated, or they can be columnar protrusions. A feed spiral blade is located at the front end of the rotating shaft connection (see [reference]). Figure 9 The threshing blades 36 can swallow the crops and push them to the rear. The long strip or columnar threshing blades 36 can be bolted to the suspended inner cylinder 35 by radially inserted bolts. They can be detachably fixed to the suspended inner cylinder 35. The relief grooves 31 for the threshing blades 36 to extend should also correspond to the width or diameter of the threshing blades 36, so that the threshing blades 36 can be installed after the suspended inner cylinder 35 is installed into the rotating cylinder 30.

[0025] In the accompanying drawings of this embodiment, the threshing blades 36 are spiral-shaped, which can assist in propelling the crop while crushing and threshing. (See attached drawings.) Figure 7 The outer wall of the suspended inner cylinder 35 is also provided with a groove for the threshing blades 36 to fall into. The width of this groove and the clearance groove 31 should be larger than that of the threshing blades 36, so that the threshing blades 36 can be installed from the outside to the inside. The circumferential angle of the spiral extension of the threshing blades 36 should not be too large, so as to avoid the clearance groove 31 being too wide and affecting the structural strength and performance. The wall of the suspended inner cylinder 35 is also provided with a through hole. After the threshing blades 36 are installed from the outside to the inside, they are inserted into the aforementioned through hole through a connecting post 37 from the inner hole of the suspended inner cylinder 35, and connected to the bottom of the threshing blades 36 by screws. The connecting post 37 has an annular groove. In this embodiment, three threshing blades 36 correspond to three connecting posts 37, and are inserted by the end of the connecting post 37.Figure 8 The aforementioned end plug tightens and fixes the three threshing blades 36, achieving a detachable connection. To facilitate the circumferential positioning and smooth insertion of the end plug, mutually compatible guide protrusions and guide grooves can be provided on the outer circumference of the end plug and the inner wall of the suspended inner cylinder 35.

[0026] To facilitate understanding, the assembly, disassembly, and use process of the main structure of the rotary threshing device shaft in this embodiment will be briefly explained again: During assembly: 1. Six helical compression springs 39 are connected to mounting bases 40 at both ends and fall into the annular mounting grooves 41.

[0027] 2. The mounting seat 40 at one end of the helical compression spring 39 is inserted into the assembly blind hole 32 on the suspended inner cylinder 35. A special clamp is used on the outer side of the end of the suspended inner cylinder 35. The two ends of the special clamp are respectively pressed against the inner wall of the suspended inner cylinder 35 and the top of the mounting seat 40 at the outer end of the helical compression spring 39. The special clamp is retracted, compressing the helical compression spring 39, so that the mounting seat 40 at the outer end abuts against the mounting seat 40 on the inner side, and the helical compression spring 39 is compressed. At this time, the height of the mounting seat 40 at the outer end and the clamp protruding from the outer wall of the suspended inner cylinder 35 is less than the radial gap on one side when the suspended inner cylinder 35 and the rotating cylinder 30 are coaxial.

[0028] 3. Install six helical compression springs 39 at both ends of the suspended inner cylinder 35 and press them together with special clamps. Then, insert them into the rotating cylinder 30 with the inner and outer assembly blind holes 32 facing each other. Release and remove the special clamps, and the helical compression springs 39 will extend. The outer mounting seat 40 will fall into the assembly blind hole 32 on the inner wall of the rotating cylinder 30. The suspended inner cylinder 35 is elastically supported and connected to the rotating cylinder 30 by the six helical compression springs 39. Install a plug 34 in the disassembly hole 33 to prevent foreign objects from squeezing the outer mounting seat 40.

[0029] 4. Insert the threshing blade 36 from the outside through the clearance groove 31. After it falls into place, use the connecting post 37 to extend from the inner hole of the suspension inner cylinder 35 into the through hole of the inner wall of the suspension inner cylinder 35. Secure and tighten it to the bottom of the threshing blade 36 with screws. Both ends of the threshing blade 36 are connected to the connecting post 37. The section of the connecting post 37 that protrudes into the inner hole of the suspension inner cylinder 35 has an annular groove. After the six connecting posts 37 are connected stably, insert end plugs from both ends of the inner hole of the suspension inner cylinder 35 to clamp and connect the three connecting posts 37 at the corresponding ends.

[0030] 5. Connect the front and rear shaft connecting parts to both ends of the rotating cylinder 30 respectively (the connection method is a conventional connection, which is not an innovation of this application and will not be described in detail). This can prevent the end plug from coming out and complete the assembly in the use state. The rotating cylinder 30 is coaxially inserted into the outer cylinder (not shown in the figure) that cooperates with the crushing and threshing. The outer cylinder is fixed. The front and rear shaft connecting parts of the rotating cylinder 30 are connected to the drive end (not shown in the figure), and it can be used.

[0031] The disassembly process can be carried out in reverse order of the assembly process; the reverse process for the same parts will not be repeated here. The difference is: after removing the threshing blades 36, when further disassembling the connection between the suspended inner cylinder 35 and the rotating cylinder 30 is required, first unscrew the plug 34 from the disassembly hole 33, then use a straight rod tool to insert it into the disassembly hole 33 and push the mounting seat 40 in the assembly blind hole 32 on the rotating cylinder 30 inwards; whether or not to continue using the aforementioned special clamp is optional; given that using the special clamp is safer, it is recommended to use the special clamp to hold the cylinder, and then continue the reverse process to complete the disassembly for maintenance and repair.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A rotary threshing device with a rotating shaft main structure, comprising a cylindrical rotating cylinder; characterized in that: The rotating cylinder is provided with coaxial suspended inner cylinders at intervals. An elastic element is provided between the suspended inner cylinder and the rotating cylinder. The elastic element is used to elastically support and connect the suspended inner cylinder to the rotating cylinder. The suspended inner cylinder has a plurality of threshing blades evenly distributed circumferentially. The threshing blades extend outward from the rotating cylinder in the radial direction. The rotating cylinder has corresponding clearance grooves through which the free ends of the threshing blades extend.

2. The main structure of the rotating shaft of the rotary threshing device according to claim 1, characterized in that: The threshing blades extend axially along the rotating cylinder and the suspended inner cylinder. The axial length of the threshing blades is less than the length of the rotating cylinder, and both ends of the threshing blades are located within the two ends of the rotating cylinder.

3. The main structure of the rotating shaft of the rotary threshing device according to claim 1, characterized in that: The threshing blades are detachably connected to the suspended inner cylinder.

4. The main structure of the rotating shaft of the rotary threshing device according to claim 1, characterized in that: The elastic element includes two spring units respectively disposed between the two ends of the rotating cylinder and the suspended inner cylinder. Each spring unit includes at least three circumferentially distributed helical compression springs, which are compressed between the outer wall of the suspended inner cylinder and the inner wall of the rotating cylinder.

5. The rotating shaft main structure of the rotary threshing device according to claim 4, characterized in that: The two ends of the helical compression spring rest in the mounting base, and one side of the mounting base has an annular mounting groove for the ends of the helical compression spring to enter. Assembly blind holes are respectively opened on the outer wall of the suspended inner cylinder and the inner wall of the rotating cylinder, and the mounting bases at both ends of the helical compression spring are respectively placed in the assembly blind holes on the outer wall of the suspended inner cylinder and the inner wall of the rotating cylinder.

6. The rotating shaft main structure of the rotary threshing device according to claim 5, characterized in that: The outer wall of the rotating cylinder has a pair of disassembly holes that extend through to the assembly blind hole.

7. The rotating shaft main structure of the rotary threshing device according to any one of claims 1-6, characterized in that: The threshing blades are long and straight.

8. The rotating shaft main structure of the rotary threshing device according to any one of claims 1-6, characterized in that: The threshing blades are spiral-shaped.

9. The rotating shaft main structure of the rotary threshing device according to any one of claims 1-6, characterized in that: The threshing blades have columnar protrusions.

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