A straw pulling roller and a straw pulling device

Abstract

The utility model discloses a kind of stem pulling roller and stem pulling device, including several installation surfaces of stem pulling roller tube shaft, several installation surfaces install stem pulling roller cutter;The one end of stem pulling pipe shaft is set stem pulling roller rear sleeve, the other end is set stem pulling roller guide cone;Stem pulling roller guide cone is set stem pulling roller front thread sleeve inside, the one end of stem pulling roller front thread sleeve is set conical pin, conical pin is set with deep groove ball bearing and stem pulling roller front spacer sleeve on sleeve. Stable installation surface is provided by stem pulling roller tube shaft, stem pulling roller cutter can be accurately welded without complex tooling, solve the problem that traditional round tube shaft is inconvenient to weld, positioning is not accurate;Stem pulling roller cutter is provided with plug welding hole, high-strength metallurgical combination is formed by plug welding, shear and tension resistance is enhanced, avoid loose and fall off of cutter body, prolong service life;Several stem pulling roller cutters are arranged with left and right staggered cutters, realize high-frequency stem pulling, make stem stress uniform, reduce winding broken stem, improve cluster integrity, reduce impurity, significantly optimize corn combine harvester operation quality and efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery technology, specifically relating to a stem-pulling roller and stem-pulling device. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] In the field of agricultural machinery, corn combine harvesters are the core equipment to ensure efficient corn harvesting. The stalk pull roller of the header is a key component in corn combine harvesters that realizes stalk conveying and ear separation. Its structural rationality and performance stability directly determine the efficiency of harvesting operations, ear integrity and impurity content, and have an important impact on agricultural production income. Currently, the core load-bearing component of the stalk-pulling roller used in mainstream corn harvesting machinery headers is generally a circular tube shaft design. This traditional structure has certain problems in actual production and application. The circular tube shaft lacks a fixed reference surface, making precise positioning of the stalk-pulling roller blades during welding difficult, leading to blade misalignment and angular deviations. This results in poor consistency of stalk-pulling rollers produced in batches, affecting subsequent assembly and operational stability. Furthermore, the welding contact surface between the circular tube shaft and the stalk-pulling roller blades is arc-shaped, making welding difficult. This not only increases worker workload and reduces production efficiency but also easily leads to blade loosening and detachment due to weak welding. Limited by the structural characteristics of the circular tube shaft, traditional stalk-pulling rollers can typically only accommodate a small number of blades, resulting in low stalk-pulling frequency. When dealing with high-density corn crops with high lodging rates, problems such as stalk entanglement and ear entanglement easily occur, leading to poor stalk-pulling effect and increased burden on subsequent cleaning processes. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a stalk-pulling roller and a stalk-pulling device. The stalk-pulling roller tube shaft provides a stable mounting surface, allowing for precise welding of the stalk-pulling roller blades without complex tooling, thus solving the problems of inconvenient welding and inaccurate positioning associated with traditional circular tube shafts. The stalk-pulling roller blades are equipped with plug welding holes, forming a high-strength metallurgical bond through plug welding, enhancing shear and tensile strength, preventing blade loosening and detachment, and extending service life. Several stalk-pulling roller blades, arranged in a staggered left-right configuration, achieve high-frequency stalk pulling, ensuring uniform force on the stalk, reducing entanglement and stalk breakage, improving ear integrity, reducing impurities, and significantly optimizing the operating quality and efficiency of the corn combine harvester.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A stem-pulling roller includes a stem-pulling roller tube shaft with several mounting surfaces on which stem-pulling roller cutters are mounted. One end of the stem-pulling roller tube shaft is provided with a stem-pulling roller rear sleeve, and the other end is provided with a stem-pulling roller guide cone. A stem-pulling roller front threaded sleeve is provided inside the stem-pulling roller guide cone, and a tapered pin is provided at one end of the stem-pulling roller front threaded sleeve. A deep groove ball bearing and a stem-pulling roller front spacer are sleeved on the tapered pin.

[0006] As a further technical solution, the stem-pulling roller cutter is provided with plug welding holes, and several plug welding holes are arranged at intervals to weld the stem-pulling roller cutter and the stem-pulling roller tube shaft through the plug welding holes.

[0007] As a further technical solution, a straight-through pressure injection cup is provided on the tapered pin, and the straight-through pressure injection cup and the tapered pin are detachably connected.

[0008] As a further technical solution, several deep groove ball bearings are provided.

[0009] As a further technical solution, the two ends of the front spacer of the stalk puller are provided with deep groove ball bearings, and the two end faces of the front spacer of the stalk puller are in close contact with the deep groove ball bearings.

[0010] As a further technical solution, a front support for the stem-pulling roller is provided at one end of the conical pin, and a bolt is provided on the front support for the stem-pulling roller.

[0011] As a further technical solution, the bolts are screwed into the front support of the stem-pulling roller and the conical pin in sequence to connect the front support of the stem-pulling roller and the conical pin.

[0012] As a further technical solution, a nut is provided at the end of the bolt, the nut is screwed into the bolt, and the lower end face of the nut is in close contact with the front support of the pull roller.

[0013] As a further technical solution, the conical pin and the guide cone of the stem-pulling roller are connected.

[0014] A stem-pulling device includes a stem-pulling roller with staggered blades.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are: This utility model features a stem-pulling roller tube shaft with several mounting surfaces, providing a stable reference surface for welding the stem-pulling roller cutter and simplifying the welding positioning process. During welding, the stem-pulling roller cutter can be arranged and welded based on the shaft surface, eliminating the need for additional complex positioning fixtures and measurement methods. This ensures that the stem-pulling roller cutter is accurately welded to the predetermined position, improving welding efficiency and effectively guaranteeing the consistency of stem-pulling rollers in mass production. It solves the problems of inconvenient welding and inaccurate positioning in traditional structures. The stem-pulling roller cutter of this invention has plug welding holes on its blade body. The plug welding process enables a tighter and more secure connection between the blade body and the stem-pulling roller tube shaft. During welding, filler material penetrates through the plug welding holes into the space between the blade body and the tube shaft, forming a high-strength metallurgical bond. This enhances the shear and tensile strength of the welded area, effectively preventing loosening and detachment of the stem-pulling roller cutter due to insufficient weld strength under high-speed and heavy-load operating conditions, thus extending the overall service life and stability of the stem-pulling roller. This utility model's stalk-pulling device features multiple stalk-pulling rollers that sequentially contact the corn stalks, enabling high-frequency stalk-pulling operations. In each channel of the header, the left and right stalk-pulling rollers are staggered, further enhancing the gripping and pulling effect on the stalks. This results in more even and stable force distribution on the stalks between the rollers, effectively reducing stalk entanglement and breakage, improving ear integrity, and minimizing impurities carried during harvesting. Ultimately, this significantly improves the operational quality and efficiency of the corn combine harvester. Attached Figure Description

[0016] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0017] Figure 1 This is a structural diagram of the stem-pulling roller of this utility model; Figure 2 This is a cross-sectional view of the stem-pulling roller of this utility model; Figure 3 This is a disassembled diagram of the stem-pulling roller of this utility model; Figure 4 This is a top view of the stem-pulling roller of this utility model; In the diagram: 1. Conical pin; 2. Front support of the stem-pulling roller; 3. Nut; 4. Bolt; 5. Straight-through oil injection cup; 6. Front spacer of the stem-pulling roller; 7. Deep groove ball bearing; 8. Front threaded sleeve of the stem-pulling roller; 9. Front shaft of the stem-pulling roller; 10. Rear sleeve of the stem-pulling roller; 11. Cutting blade of the stem-pulling roller; 12. Guide cone of the stem-pulling roller; 13. Tube shaft of the stem-pulling roller. Detailed Implementation

[0018] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0019] Currently, the core load-bearing component of the stalk-pulling roller used in mainstream corn harvesting machinery headers is generally a circular tube shaft design. This traditional structure has certain problems in actual production and application. The circular tube shaft lacks a fixed reference surface, making precise positioning of the stalk-pulling roller blades during welding difficult, leading to blade misalignment and angular deviations. This results in poor consistency of stalk-pulling rollers produced in batches, affecting subsequent assembly and operational stability. Furthermore, the welding contact surface between the circular tube shaft and the stalk-pulling roller blades is arc-shaped, making welding difficult. This not only increases worker workload and reduces production efficiency but also easily leads to blade loosening and detachment due to weak welding. Limited by the structural characteristics of the circular tube shaft, traditional stalk-pulling rollers can typically only accommodate a small number of blades, resulting in low stalk-pulling frequency. When dealing with high-density corn crops with high lodging rates, problems such as stalk entanglement and ear entanglement easily occur, leading to poor stalk-pulling effect and increased burden on subsequent cleaning processes.

[0020] Example 1: The present invention will now be described in detail with reference to the accompanying drawings. This embodiment discloses a stem-pulling roller, such as... Figure 1 , Figure 2 as well as Figure 3 As shown, it includes a stem-pulling roller tube shaft 13, which has several mounting surfaces on which stem-pulling roller cutters 11 are mounted; a stem-pulling roller rear sleeve 10 is provided at one end of the stem-pulling roller tube shaft, and a stem-pulling roller guide cone 12 is provided at the other end; a stem-pulling roller front threaded sleeve 8 is provided inside the stem-pulling roller guide cone 12, and a tapered pin 1 is provided at one end of the stem-pulling roller front threaded sleeve 8, on which a deep groove ball bearing 7 and a stem-pulling roller front spacer 6 are sleeved.

[0021] Specifically, the stem-pulling roller tube shaft 13 has several mounting surfaces, providing a stable reference surface for welding the stem-pulling roller cutter 11 and simplifying the welding positioning process. During the welding process, the stem-pulling roller cutter 11 can be arranged and welded according to the shaft surface without the need for additional complex positioning fixtures and measurement methods. This ensures that the stem-pulling roller cutter 11 is accurately welded to the predetermined position, improving welding efficiency and effectively guaranteeing the consistency of stem-pulling rollers in mass production. It also solves the problems of inconvenient welding and inaccurate positioning in traditional structures.

[0022] Specifically, such as Figure 4 As shown, the stem-pulling roller shaft 13 is an octagonal shaft, meaning the stem-pulling roller cutter 11 is welded on all eight sides of the octagonal shaft. This facilitates the welding of the stem-pulling roller cutter 11 and better ensures the accuracy of the welding position. The stem-pulling roller cutter 11 has plug welding holes to better ensure the welding strength. The stem-pulling roller is equipped with eight stem-pulling roller cutters 11. The large number of stem-pulling roller cutters 11 results in a high stem-pulling frequency and a better stem-pulling effect.

[0023] The stem-pulling roller cutter 11 is provided with plug welding holes, and several plug welding holes are arranged at intervals. The stem-pulling roller cutter 11 and the stem-pulling roller tube shaft 13 are welded through the plug welding holes.

[0024] Specifically, the stem-pulling roller cutter 11 has plug welding holes on its blade body. The plug welding process enables a tighter and more secure connection between the blade body and the octagonal shaft tube. During welding, filler material penetrates through the plug welding holes into the space between the blade body and the tube, forming a high-strength metallurgical bond. This enhances the shear and tensile strength of the welded area, effectively preventing loosening and detachment of the stem-pulling roller cutter 11 due to insufficient weld strength under high-speed and heavy-load operating conditions. This extends the overall service life and stability of the stem-pulling roller.

[0025] A straight-through pressure injection cup 5 is provided on the tapered pin 1, and the straight-through pressure injection cup 5 and the tapered pin 1 are detachably connected.

[0026] Specifically, the oil cup adopts a straight-through structure design, which can directly connect with the lubrication channels of rotating components such as the deep groove ball bearing 7 in the stalk roller assembly. During operation, the operator does not need to disassemble the stalk roller structure; they only need to inject grease into the oil cup. The grease can then be precisely delivered to the bearing friction surface along the channel, forming a continuous and effective lubricating film. This reduces frictional loss and temperature rise of the bearing during high-speed rotation, and avoids bearing wear, jamming, and other malfunctions caused by dry friction.

[0027] Several deep groove ball bearings 7 are provided. Deep groove ball bearings 7 are provided at both ends of the front spacer 6 of the stem-pulling roller, and the two end faces of the front spacer 6 of the stem-pulling roller are in close contact with the deep groove ball bearings 7. A front support 2 for the stem-pulling roller is provided at one end of the tapered pin 1, and a bolt 4 is provided on the front support 2 of the stem-pulling roller. The bolt 4 is screwed into the front support 2 of the stem-pulling roller and the tapered pin 1 in sequence, connecting the front support 2 of the stem-pulling roller and the tapered pin 1.

[0028] Specifically, in the cooperation between the deep groove ball bearing 7 and the front spacer 6 of the stalk roller, both ends of the front spacer 6 of the stalk roller are equipped with deep groove ball bearings 7 and the end faces are in close contact. The spacer can accurately position the distance between the two bearings, avoid additional friction caused by positional displacement of the bearings during operation, and ensure synchronous and stable rotation of the bearings. A nut 3 is provided at the end of bolt 4. Nut 3 is screwed into bolt 4, and the lower end face of nut 3 is in close contact with the front support 2 of the stem-pulling roller. The tapered pin 1 is connected to the guide cone 12 of the stem-pulling roller. Specifically, the connection is achieved by the cooperation of bolt 4 and nut 3, which is firm and easy to disassemble.

[0029] Example 2: A stem-pulling device includes stem-pulling rollers with staggered blades.

[0030] Specifically, the stem pulling device also includes a cutting table, with two stem pulling rollers on the left and right sides in each channel of the cutting table. The left and right stem pulling rollers are arranged with staggered blades. Each stem pulling roller has 8 stem pulling roller blades 11. The large number of stem pulling roller blades 11 results in a high stem pulling frequency, better stem pulling effect, and less impurities.

[0031] Specifically, the staggered blade arrangement refers to the fact that the two stalk-pulling rollers on the left and right sides of each working channel have their stalk-pulling blades 11 welded to their surfaces that are not perfectly aligned, but rather staggered along the axial and circumferential directions of the rollers. If a stalk-pulling blade 11 on the left stalk-pulling roller is at a specific axial position and circumferential angle, the corresponding stalk-pulling blade 11 on the right stalk-pulling roller will be staggered by a certain distance axially and a certain angle circumferentially, preventing the blades on both sides from facing each other or overlapping during rotation. This arrangement allows the stalk-pulling blades 11 of the left and right stalk-pulling rollers to form a relay-style gripping and conveying action, reducing corn stalk slippage and jamming, distributing the force on the stalks to avoid breakage or entanglement, thereby improving the smoothness and stability of the stalk-pulling operation.

[0032] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A stem-pulling roller, characterized in that, The device includes a stem-pulling roller tube shaft, which has several mounting surfaces on which stem-pulling roller cutters are mounted. One end of the stem-pulling roller tube shaft is provided with a stem-pulling roller rear sleeve, and the other end is provided with a stem-pulling roller guide cone. A stem-pulling roller front threaded sleeve is provided inside the stem-pulling roller guide cone, and a conical pin is provided at one end of the stem-pulling roller front threaded sleeve. A deep groove ball bearing and a stem-pulling roller front spacer are fitted on the conical pin.

2. A stem-pulling roller as described in claim 1, characterized in that, The stem-pulling roller cutter is provided with plug welding holes, and several plug welding holes are arranged at intervals to weld the stem-pulling roller cutter and the stem-pulling roller tube shaft through the plug welding holes.

3. A stem-pulling roller as described in claim 1, characterized in that, A straight-through oil injection cup is provided on the tapered pin, and the straight-through oil injection cup and the tapered pin are detachably connected.

4. A stem-pulling roller as described in claim 1, characterized in that, Several deep groove ball bearings are provided.

5. A stem-pulling roller as described in claim 1, characterized in that, The front sleeve of the stalk-pulling roller is equipped with deep groove ball bearings at both ends, and the two end faces of the front sleeve of the stalk-pulling roller are in close contact with the deep groove ball bearings.

6. A stem-pulling roller as described in claim 1, characterized in that, One end of the conical pin is provided with a front support for the stem-pulling roller, and a bolt is provided on the front support for the stem-pulling roller.

7. A stem-pulling roller as described in claim 6, characterized in that, The bolts are screwed into the front support of the stem-pulling roller and the conical pin in sequence to connect the front support of the stem-pulling roller and the conical pin.

8. A stem-pulling roller as described in claim 7, characterized in that, A nut is provided at the end of the bolt, and the nut is screwed into the bolt, with the lower end face of the nut in close contact with the front support of the pull roller.

9. A stem-pulling roller as described in claim 1, characterized in that, The conical pin is connected to the stem-pulling roller guide cone.

10. A stem-pulling device, comprising a stem-pulling roller as described in any one of claims 1-9, characterized in that, The stem-pulling rollers are arranged with staggered blades.

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