An adjustable reel device for a grain harvester

Abstract

The utility model discloses an adjustable type poking reel device of grain harvester, including central shaft, synchronous disc and poking rod, be arranged with elastic tooth structure on poking rod, and elastic tooth structure includes upper adjusting plate and lower adjusting plate, and lower adjusting plate sets up on poking rod, and upper adjusting plate sets up on lower adjusting plate, and upper adjusting plate and lower adjusting plate all are equipped with long strip perforation, and upper adjusting plate and lower adjusting plate opposite end are connected with spring ring, and spring ring end is connected with poking straight pole. The utility model is provided with elastic tooth structure, and it can realize flexible, continuous adjustment of interval on poking rod, realizes the efficient adaptation to different grain types, planting density and crop state through stepless adjustment of elastic tooth interval, thereby improve the disadvantage that the existing technology needs to prepare storage space for the multiple sets of fixed elastic tooth interval poking reel, reduce the storage pressure, additional purchase cost and maintenance burden brought by the standby poking reel.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, specifically to an adjustable reel device for a grain harvester. Background Technology

[0002] Grain harvesters are key pieces of equipment in modern agriculture, and the performance of their reels directly affects harvesting efficiency and quality. The core function of the reel is to smoothly and efficiently guide the stalks of grain to be harvested to the cutter, and then neatly convey them onto the conveyor system after cutting. Currently, the reels of mainstream grain harvesters on the market typically feature a fixed design where the spring teeth are directly fastened to predetermined positions on the reel stalks using independent bolts.

[0003] However, the tooth spacing needs to be adjusted when harvesting different types of crops. For example, when harvesting sparsely planted grains with thin stems (such as millet and certain varieties of oats), a smaller tooth spacing is needed to prevent crop stems from passing through excessively wide gaps, ensuring effective support and conveying. When harvesting densely planted grains with thick stems or high moisture content that are prone to tangling (such as high-yield rice and barley), a larger tooth spacing is needed to effectively reduce the blockage and tangling of crop stems and weeds at the base of the tooth, ensuring smooth rotation of the reel.

[0004] To meet the above-mentioned different needs, harvester users usually have two or more sets of reel assemblies with different tooth spacing to effectively solve the problem of using reels with different tooth spacing for different plants. However, two or more sets of reels need to be equipped with dedicated storage space for placement, which increases the pressure of on-site warehousing and inventory. Utility Model Content

[0005] The purpose of this utility model is to provide an adjustable reel device for a grain harvester, so as to solve the technical problem in the prior art that the storage and inventory pressure and the purchase and maintenance costs are increased due to the preparation of multiple sets of reels with different tooth pitches.

[0006] To solve the above-mentioned technical problems, this utility model specifically provides the following technical solution: An adjustable reel device for a grain harvester includes a central shaft and synchronous discs coaxially arranged at both ends of the central shaft. Multiple reeling rods are arranged between the two synchronous discs, with both ends of each reeling rod mounted on the two synchronous discs. Multiple spring tooth structures are arranged on each reeling rod along its axial direction. The spring tooth structure includes an upper adjustment plate and a lower adjustment plate stacked together. The lower adjustment plate is slidably disposed on the outer wall of the reel along the axial direction of the reel. The upper adjustment plate is slidably disposed on the top surface of the lower adjustment plate by means of surface contact, and the upper adjustment plate slides along the length direction of the upper adjustment plate. Both the upper and lower adjustment plates have elongated through holes along their length. Bolts are used to press and fix the upper and lower adjustment plates onto the reel by passing through the elongated through holes and engaging with threaded holes on the reel in sequence. The upper and lower adjusting plates are connected to opposite ends with spring coils, and the ends of the spring coils are connected to a reeling rod.

[0007] In a preferred embodiment of this utility model, the threaded hole extends through the reel from top to bottom along the radial direction of the reel, and the upper adjusting plate and the lower adjusting plate are disposed at the top of the reel.

[0008] As a preferred embodiment of this utility model, the top surface of the upper adjusting plate is configured as a flat bearing surface for contacting the head of the bolt or the washer.

[0009] As a preferred embodiment of this utility model, the bottom surface of the lower adjusting plate is provided with an arc-shaped sliding groove, the contour of which is adapted to the outer circumferential surface of the reel.

[0010] In a preferred embodiment of this utility model, the spring coil includes a helical torsion section and a compression section, wherein the pitch of the compression section is greater than the pitch of the torsion section.

[0011] As a preferred embodiment of this utility model, the outer contour of the cross-section of the rice-pulling rod continuously and uniformly increases from its bottom end to its top end to form a frustum shape, and the large end of the frustum-shaped rice-pulling rod is set towards the top end of the rice-pulling rod.

[0012] Compared with the prior art, this utility model has the following advantages: This invention features a spring tooth structure that allows for flexible and continuous adjustment of the spacing on the reel. Through stepless adjustment of the spring tooth spacing, it achieves efficient adaptation to different grain types, planting densities, and crop conditions. This overcomes the drawback of existing technologies that require storage space for multiple reels with fixed spring tooth spacing, reduces storage pressure, additional purchase costs, and maintenance burdens associated with spare reels, and significantly reduces downtime caused by reel replacement, thereby significantly improving the continuity and overall efficiency of harvesting operations. Attached Figure Description

[0013] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0014] Figure 1 This is a front view of the present invention. Figure 2 This is a structural schematic diagram of the present invention, specifically a structural schematic diagram of the reeling rod and the synchronization disc; Figure 3 This is a schematic diagram of the spring tooth structure of this utility model; Figure 4 This is a cross-sectional schematic diagram of the spring tooth structure of this utility model.

[0015] The labels in the diagram represent the following: 1. Central shaft; 2. Synchronous disc; 3. Reeling rod; 4. Spring tooth structure; 5. Upper adjusting plate; 6. Lower adjusting plate; 7. Long strip perforation; 8. Spring ring; 9. Reeling rod; 10. Threaded hole; 11. Arc-shaped slide groove; 12. Torsion section; 13. Extrusion section. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figure 1 and Figure 2 As shown, this utility model provides an adjustable reel device for a grain harvester, including a central shaft 1 and synchronous discs 2 coaxially arranged at both ends of the central shaft 1. Multiple reeling rods 3 are arranged between the two synchronous discs 2, with each end of a reeling rod 3 mounted on one of the two synchronous discs 2. The central shaft 1 is connected to the harvester's drive mechanism. The synchronous discs 2 are used to fix the reeling rods 3 and can also be used in conjunction with an eccentric adjustment mechanism to adjust the overall eccentricity when needed. Each reeling rod 3 has multiple adjustable tooth structures 4 arranged along its axial direction (i.e., the harvester's width direction). This tooth structure 4 allows the same reel assembly to adjust the tooth spacing for different crops, planting densities, and lodging conditions, eliminating the need to store multiple reel assemblies with different tooth pitches as in existing technologies, thus reducing the user's storage and inventory pressure.

[0018] like Figure 3 As shown, the specific structure of the spring tooth structure 4 is as follows: The spring tooth structure 4 includes an upper adjusting plate 5 and a lower adjusting plate 6 stacked together. The lower adjusting plate 6 covers the outer wall of the reeling rod 3 and can slide freely along the axial direction of the reeling rod 3. Its bottom surface is provided with an arc-shaped groove 11 that is perfectly adapted to the outer circumferential surface of the reeling rod 3, such as... Figure 4 As shown, the lower adjusting plate 6 can both stably hold the reel 3 and smoothly adjust its position axially after being released. The upper adjusting plate 5 is stacked with its top surface completely in contact with the top surface of the lower adjusting plate 6, and can slide relative to the lower adjusting plate 6 along its own length direction (i.e., the harvester width direction, the direction of the reel 3 axis). The top surface of the upper adjusting plate 5 is machined into a flat bearing surface so that the bolt head or washer is evenly stressed, avoiding local deformation. Both the upper adjusting plate 5 and the lower adjusting plate 6 have elongated through holes 7 along their length direction. The top of the reel 3 has a threaded hole 10 that runs radially from top to bottom. The upper adjusting plate 5 and the lower adjusting plate 6 are set on the top of the reel 3, and this top is always set upwards during the rotation of the reel to reduce the probability of it getting caught in straw. The cross-section of the reel 3 is circular, with four lateral directions: top, bottom, left, and right. The left and right directions are where it comes into most contact with the crop during operation, resulting in the highest probability of grass being caught. Since the reel rotates from top to bottom to pull the plant into the cutter, the bottom of the reel 3 also has a higher probability of contact with the plant than its top. Therefore, fixing the bolt to the top of the reel 3 effectively prevents grass from being caught during reel rotation. The bolt passes sequentially through the elongated through-holes 7 of the upper adjusting plate 5 and the lower adjusting plate 6, and then threadedly engages in the threaded hole 10, thereby simultaneously pressing and fixing the upper and lower adjusting plates 6 onto the reel 3.

[0019] like Figure 3 As shown, spring coils 8 are connected to the outer ends of the upper adjusting plate 5 and the lower adjusting plate 6 (i.e., opposite ends), respectively. The other end of the spring coils 8 is connected to the reeling rod 9. The spring coils 8 are divided into a spiral torsion section 12 and a compression section 13, wherein the pitch of the compression section 13 is larger than the pitch of the torsion section 12. The purpose of this design is that when the reeling rod 9 is blocked by a hard object and cannot rotate for a short time, the torsion section 12 can use its own torsional elastic deformation to allow the reeling rod 9 to avoid the obstacle, and after the blocking state is released, the elastic force will drive the reeling rod 9 to return to its original state without affecting the reeling operation. The compression section 13, due to the larger pitch between the spiral coils, can be compressed or stretched along the axial direction of the connecting pipe, thereby damping the lateral pressure received by the reeling rod 9 and preventing the large lateral pressure from being transmitted to the adjusting plate, which could cause the adjusting plate to loosen the bolt connection or even slip the adjusting plate, changing the spring tooth spacing.

[0020] The straight stem 9 is made of wear-resistant engineering plastic or galvanized steel. Its cross-sectional outer contour continuously and uniformly increases from the bottom (the end connecting the spring coil 8) to the top, forming a frustum shape, with the larger end facing the top (i.e., the working end is thicker). This frustum-shaped design not only reduces resistance when the straight stem 9 is inserted into the crop, but also gives the top greater rigidity, extending its service life, and guides the crop along its outer contour surface, preventing it from getting tangled in weeds. In addition, the thicker stem 9 at the base provides higher rigidity, preventing bending during use. In practical use, when it is necessary to adjust the tooth spacing, simply loosen the bolts with a regular wrench and slide the upper and lower adjusting plates 6 along the axis of the stem 3 (the upper adjusting plate 5 moves along with it). This will change the axial position of the tooth structure 4 on the stem 3. After all the tooth structures 4 are adjusted in coordination, the overall tooth spacing of the machine can be changed. After adjustment, tighten the bolts to lock the position.

[0021] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. An adjustable reel device for a grain harvester, characterized in that, It includes a central shaft (1) and synchronous discs (2) coaxially arranged at both ends of the central shaft (1), and multiple hoeing rods (3) are arranged between the two synchronous discs (2), with the two ends of the hoeing rods (3) respectively mounted on the two synchronous discs (2), characterized in that: Multiple spring tooth structures (4) are arranged along the axial direction of the stalk (3). The spring tooth structure (4) includes an upper adjustment plate (5) and a lower adjustment plate (6) stacked together. The lower adjustment plate (6) is slidably disposed on the outer wall of the stalk (3) along the axial direction of the stalk (3). The upper adjustment plate (5) is slidably disposed on the top surface of the lower adjustment plate (6) by means of surface contact, and the upper adjustment plate (5) slides along the length direction of the upper adjustment plate (5). Both the upper adjusting plate (5) and the lower adjusting plate (6) have long through holes (7) along their length direction. Bolts pass through the long through holes (7) in sequence and cooperate with the threaded holes (10) on the hoe (3) to press and fix the upper adjusting plate (5) and the lower adjusting plate (6) on the hoe (3). The upper adjusting plate (5) and the lower adjusting plate (6) are connected to opposite ends of a spring coil (8), and the ends of the spring coil (8) are connected to a reeling rod (9).

2. The adjustable reel device for a grain harvester according to claim 1, characterized in that: The threaded hole (10) extends through the reel (3) radially from top to bottom, and the upper adjusting plate (5) and the lower adjusting plate (6) are disposed at the top of the reel (3).

3. The adjustable reel device for a grain harvester according to claim 1, characterized in that: The top surface of the upper adjusting plate (5) is set to be flat to form a pressure bearing surface for contact with the head of the bolt or the washer.

4. The adjustable reel device for a grain harvester according to claim 1, characterized in that: The bottom surface of the lower adjustment plate (6) is provided with an arc-shaped sliding groove (11), the outline of which is adapted to the outer circumference of the reaping rod (3).

5. The adjustable reel device for a grain harvester according to claim 1, characterized in that: The spring coil (8) includes a helical twist section (12) and a compression section (13), the pitch of which is greater than the pitch of the twist section (12).

6. The adjustable reel device for a grain harvester according to claim 1, characterized in that: The cross-sectional outer contour of the plucking rod (9) increases continuously and uniformly from its bottom end to its top end to form a frustum shape, and the large end of the frustum-shaped plucking rod (9) is set towards the top end of the plucking rod (9).

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