Harvester crop anti-ejection stirring wheel baffle curtain
By combining the blocking and filtering mechanisms, the problems of angle deviation of the harvester's agitator under vibration and impurity screening are solved, achieving effective interception of crops and separation of impurities, thus improving the harvester's protective effect and harvesting quality.
Patent Information
- Application Number
- CN202522636663.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-12
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-12-12
AI Technical Summary
The existing harvester's agitator design is simple and cannot effectively lock the shielding angle, resulting in protection failure under vibration conditions. In addition, it lacks impurity screening function, resulting in a high impurity content in the harvested material.
The design combines a blocking mechanism and a filtering mechanism. The blocking mechanism locks the angle of the blocking curtain through the meshing of a toothed disc and the clamping of a spring. The filtering mechanism adjusts the aperture by adjusting the curtain and the fixing structure of the locking bolt, thus forming an effective physical barrier and impurity screening.
It achieves stable adjustment and fixation of the blocking curtain angle under vibration environment, reducing crop loss, and realizes the initial separation of impurities from crops through the staggered through hole structure, thereby improving harvesting quality.
Smart Images
Figure CN224936166U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a crop anti-ejection chaff curtain for harvesters. Background Technology
[0002] When harvesting crops, the harvester uses the high-speed rotation of the mixing rollers to push the crops in front into the harvesting platform for collection and conveying, so as to carry out the subsequent threshing and cleaning processes. This is the core of the harvester's operation.
[0003] However, in actual operation, due to the high speed of the stirring roller and the initial velocity of the crop grains, some detached crop grains or lighter ears of grain are easily thrown out by the stirring roller under the action of centrifugal force. If there is no effective shielding structure, these thrown crops will be directly scattered in the field, resulting in an increased harvest loss rate and directly affecting the economic income of farmers.
[0004] In addition, although some existing harvesters are equipped with baffle structures, the fixed connection or adjustment methods of these baffles are too simple. Under the high-frequency vibration environment generated by the harvester operation, the angle of the baffle is prone to shift and cannot be kept stable. Furthermore, it is difficult to flexibly and steadily adjust the shielding angle according to the scattering characteristics of different crops, resulting in poor protection and failing to meet the needs of efficient and low-loss harvesting.
[0005] Therefore, this utility model proposes a crop anti-spillage chaff curtain for harvesters to address the shortcomings of existing technologies. Utility Model Content
[0006] In view of the problems existing in the harvester agitator, such as simple structural design, inability to effectively lock the shielding angle leading to protection failure under vibration conditions, and lack of impurity screening function resulting in high impurity content in the harvested crop, this utility model aims to provide a harvester crop anti-ejection agitator curtain with an improved structure that can effectively solve the above problems.
[0007] This utility model provides a crop anti-ejection stirring roller curtain for a harvester, including: a mounting frame, a stirring roller rotatably connected to the front side of the middle part of the mounting frame, and a blocking mechanism disposed on the front side of the inner wall of the mounting frame.
[0008] The blocking mechanism includes a blocking curtain, a rotating shaft, a first gear disc, a second gear disc, a compression spring, and a clamping nut. The blocking mechanism has the structural feature of locking the angle of the blocking curtain through the engagement of the gear discs.
[0009] Furthermore, the rotating shaft, the blocking curtain, the first gear, the second gear, the compression spring, and the clamping nut are combined through a specific mechanical engagement method. Specifically, the rotating shaft passes through the bottom front side of the mounting frame and is rotatably connected to the mounting frame. The blocking curtain is fixedly connected to the middle of the outer wall of the rotating shaft. The first gear is fixedly connected to the bottom right outer wall of the mounting frame and is sleeved on the right end of the outer wall of the rotating shaft. The second gear is slidably connected to the right end of the outer wall of the rotating shaft and is located to the right of the first gear. The left outer wall of the second gear meshes with the right outer wall of the first gear. The compression spring is sleeved on the right end of the rotating shaft and is located on the right side of the outer wall of the second gear. A threaded groove is opened on the right end of the outer wall of the rotating shaft. The clamping nut is threadedly connected to the outer wall of the threaded groove. The left side of the clamping nut abuts against the right end of the compression spring.
[0010] Preferably, a limiting piece is fixedly connected to the rightmost end of the rotating shaft. The outer diameter of the limiting piece is larger than the outer diameter of the threaded groove. The limiting piece is used to restrict the clamping nut from disengaging from the rotating shaft to prevent the clamping nut from being accidentally unscrewed during the adjustment process.
[0011] Preferably, the system also includes a filtering mechanism disposed on top of the barrier curtain. The top wall of the barrier curtain has multiple equally spaced grooves. The filtering mechanism includes an adjusting curtain, which is slidably connected to the top of the barrier curtain via the grooves. This sliding connection allows the adjusting curtain to be adjusted in position on the surface of the barrier curtain. Both the top of the outer wall of the barrier curtain and the outer wall of the adjusting curtain have through holes. The through holes on the adjusting curtain and the barrier curtain are staggered, and the through holes penetrate both the barrier curtain and the adjusting curtain. This staggered through-hole structure allows the aperture size to be changed by sliding the adjusting curtain, thereby enabling the screening of impurities of different particle sizes.
[0012] Preferably, the filter mechanism further includes an extension curtain one, which is fixedly connected to the front side of the adjusting curtain. The bottom wall of the extension curtain one is in frictional engagement with the outer wall of the blocking curtain, using friction to assist in positioning the adjusting curtain. The filter mechanism also includes an extension curtain two, which is fixedly connected to the front side of the adjusting curtain. The extension curtain two is positioned on top of the extension curtain one and directly above it, providing a mounting base for the subsequent locking assembly. The filter mechanism also includes a locking bolt, the middle of which is threaded to the top wall of the extension curtain two and passes through the extension curtain two. The bottom end of the locking bolt is rotatably connected to the top of the extension curtain one. The locking bolt is used to fix the position of the adjusting curtain by pressing it downward against the extension curtain one. Rotating the locking bolt applies downward pressure, thereby firmly locking the adjusting curtain onto the blocking curtain.
[0013] This utility model has the following beneficial effects: 1. This utility model solves the problems in the prior art where the stirring roller easily throws out crops, causing waste, and the blind curtain is prone to angular displacement due to gravity or vibration in the high vibration environment of the harvester, by setting a blocking mechanism on the inner wall of the mounting frame and using a locking method of toothed disc meshing and spring pressing. It achieves the effect of effectively forming a physical barrier to intercept crop particles to reduce losses, while flexibly adjusting the blocking angle according to different crop harvesting needs and ensuring that the angle is locked and fixed after adjustment without loosening.
[0014] 2. This utility model solves the problem in the prior art that the barrier curtain cannot distinguish between crops and impurities, resulting in a high impurity rate in the harvest and an inability to adjust the filter pore size. It achieves the ability to flexibly change the filter pore size by using the misalignment principle of the through holes on the double-layer curtain. This ensures that while intercepting the crop fruit, it also filters out fine impurities of different particle sizes, thus achieving the effect of initial separation of crops and impurities and improving the harvesting quality. Attached Figure Description
[0015] Figure 1 This is a perspective view of a harvester crop anti-ejection agitator wheel baffle proposed in this utility model; Figure 2 This is a front view of a crop anti-ejection chaff curtain for a harvester proposed in this utility model; Figure 3 This is an exploded view of a harvester crop anti-ejection agitator roller baffle proposed in this utility model; Figure 4 Figure 3 Enlarged view of point A in the image; Figure 5 This is a split view of the filter mechanism of the crop anti-ejection agitator curtain for a harvester proposed in this utility model; Figure 6 This is a partial structural cross-sectional view of a harvester crop anti-ejection agitator curtain proposed in this utility model.
[0016] Legend: 1. Mounting bracket; 2. Blocking mechanism; 201. Blocking curtain; 202. Rotating shaft; 203. Gear disc one; 204. Gear disc two; 205. Compression spring; 206. Threaded groove; 207. Compression nut; 208. Limiting plate; 3. Filtering mechanism; 301. Adjusting curtain; 302. Extension curtain one; 303. Through hole; 304. Extension curtain two; 305. Locking bolt; 306. Slide groove; 4. Agitator roller. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0018] Example: Please refer to Figures 1 to 6 This utility model provides a crop anti-ejection chuck curtain for harvesters, which aims to solve the structural defects of existing harvester chucks 4 that easily throw crops out, causing waste, and that cannot flexibly adjust the blocking angle and lack impurity screening function.
[0019] Please refer to Figure 1 , Figure 2 and Figure 3 A crop anti-ejection chaff curtain for a harvester includes a mounting frame 1 and a chaff roller 4 rotatably connected to the front side of the middle portion of the mounting frame 1. The mounting frame 1 serves as the mounting base for the entire device and is located at the front of the harvester. The chaff roller 4 rotates on the front side of the middle portion of the mounting frame 1 and concentrates the harvested crops in the middle for subsequent threshing and collection. The harvester also includes a blocking mechanism 2 located on the front side of the inner wall of the mounting frame 1. The blocking mechanism 2 forms a physical barrier on the top of the chaff roller 4 to intercept crop particles ejected by the chaff roller 4 and guide them back. The blocking mechanism 2 includes a blocking curtain 201, a rotating shaft 202, a first toothed disc 203, a second toothed disc 204, a compression spring 205, and a clamping nut 207. The rotating shaft 202 passes through the mounting frame 1. The front bottom of the mounting bracket 1 is rotatably connected to the mounting bracket 1. The rotating shaft 202 can rotate relative to the mounting bracket 1. The blocking curtain 201 is fixedly connected to the middle of the outer wall of the rotating shaft 202. The width of the blocking curtain 201 is equal to the inner width of the mounting bracket 1. The blocking curtain 201 can change the blocking angle as the rotating shaft 202 rotates. The first gear 203 is fixedly connected to the bottom of the right outer wall of the mounting bracket 1. The first gear 203 is sleeved on the right end of the outer wall of the rotating shaft 202. The first gear 203 remains stationary and does not rotate with the rotating shaft 202. The second gear 204 is slidably connected to the right end of the outer wall of the rotating shaft 202. The second gear 204 is located to the right of the first gear 203. The second gear 204 can move left and right along the axis of the rotating shaft 202 and can rotate synchronously with the rotating shaft 202.
[0020] The left outer wall of the second gear disc 204 meshes with the right outer wall of the first gear disc 203. The left side of the second gear disc 204 has teeth, and the right side of the first gear disc 203 has teeth that match those of the second gear disc 204. When the first gear disc 203 and the second gear disc 204 are in close contact, the teeth of the second gear disc 204 engage with the teeth of the first gear disc 203, thereby using meshing force to prevent the rotating shaft 202 from rotating, and thus preventing the blocking curtain 201 from deflecting downwards due to gravity. To maintain the stability of the working angle, a compression spring 205 is sleeved on the right end of the rotating shaft 202 and located on the right side of the outer wall of the gear disc 204. A threaded groove 206 is provided on the right end of the outer wall of the rotating shaft 202. A clamping nut 207 is threadedly connected to the outer wall of the threaded groove 206. The left side of the clamping nut 207 abuts against the right end of the compression spring 205. When the clamping nut 207 is rotated to the left, it compresses the compression spring 205, thereby... The second gear 204 is pushed to press against the surface of the first gear 203, thereby locking the angle of the blocking curtain 201. When the clamping nut 207 is rotated to the right, the clamping state between the second gear 204 and the first gear 203 is released. At this time, the blocking curtain 201 can be rotated upward to overcome the elastic squeezing force generated by the compression spring 205 and adjust the upward deflection angle of the blocking curtain 201, or the second gear 204 can be moved to the right to completely separate the first gear 203 and the second gear 204, so that the blocking curtain 201 can rotate freely up and down in the mounting frame 1 as needed. The rightmost end of the rotating shaft 202 is fixedly connected to the limiting piece 208. The outer diameter of the limiting piece 208 is larger than the outer diameter of the threaded groove 206. The limiting piece 208 is used to restrict the clamping nut 207 from disengaging from the rotating shaft 202. When the clamping nut 207 rotates to the right to a certain extent, it will be blocked by the limiting piece 208, thereby preventing the clamping nut 207 from completely disengaging from the rotating shaft 202.
[0021] To filter impurities from the ejected material, a crop ejection prevention agitator curtain for a harvester also includes a filtering mechanism 3. The filtering mechanism 3 is located on top of the blocking curtain 201. The top wall of the blocking curtain 201 has multiple equidistant grooves 306. The filtering mechanism 3 includes an adjusting curtain 301, which is slidably connected to the top of the blocking curtain 201 via the grooves 306. Both the top of the outer wall of the blocking curtain 201 and the outer wall of the adjusting curtain 301 have through holes 303. The through holes 303 on the adjusting curtain 301 and the through holes 303 on the blocking curtain 201 are staggered and penetrate through both the blocking curtain 201 and the adjusting curtain 301. The blocking curtain 201 and the adjusting curtain 301 can filter the ejected material from the agitator 4 through the through holes 303, trapping the crop inside the blocking curtain 201 and throwing out smaller particles of impurities. The sliding adjusting curtain 301 can change the passable area of the through holes 303, thereby adjusting the filter aperture according to the particle size of the impurities.
[0022] To ensure the stability of the adjustable curtain 301 after adjustment, the filter mechanism 3 also includes an extension curtain 302, which is fixedly connected to the front side of the adjustable curtain 301. The bottom wall of the extension curtain 302 is in frictional engagement with the outer wall of the blocking curtain 201. The filter mechanism 3 also includes an extension curtain 304, which is fixedly connected to the front side of the adjustable curtain 301. The extension curtain 304 is located on top of the extension curtain 302 and directly above it. The filter mechanism 3 also includes a locking bolt 3. 05. The middle thread of the locking bolt 305 is connected to the top wall of the second extension curtain 304. The locking bolt 305 passes through the second extension curtain 304. The bottom end of the locking bolt 305 is rotatably connected to the top of the first extension curtain 302. The locking bolt 305 is used to fix the position of the adjusting curtain 301 by pressing the first extension curtain 302 downward. When the locking bolt 305 is rotated downward, the end of the locking bolt 305 presses the first extension curtain 302 downward, thereby using friction to lock the position of the adjusting curtain 301 on the blocking curtain 201.
[0023] Working principle: When the harvester starts working, the mounting frame 1 is located at the front of the harvester, and the stirring roller 4 rotates in the middle front of the mounting frame 1, thereby concentrating the harvested crops in the middle for subsequent threshing and collection. Since the blocking mechanism 2 is installed on the front inner wall of the mounting frame 1, the blocking curtain 201 forms a physical barrier on top of the stirring roller 4, intercepting the crop particles thrown out by the stirring roller 4 and guiding them back onto the stirring roller 4 using its inclined bottom, thus reducing waste and increasing yield and economic benefits. Because the blocking curtain 201 is rotatably connected to the inner wall of the mounting frame 1, its blocking angle can be adjusted according to actual needs, adapting to the harvesting needs of different crop varieties. Since the toothed disc 1 203 is fixedly connected to the bottom of the right outer wall of the mounting frame 1 and sleeved on the right end of the outer wall of the rotating shaft 202, and the toothed disc 204 is slidably connected to the right end of the outer wall of the rotating shaft 202 and can rotate with the rotating shaft 202, the left side... The outer wall of the gear disc 203 meshes with the right outer wall of the gear disc 203. When the gear disc 203 and the gear disc 204 are pressed tightly together, the tooth surface of the gear disc 204 engages with the tooth surface of the gear disc 203, thereby preventing the blocking curtain 201 from deflecting downward due to gravity and maintaining the stability of the working angle. When the angle needs to be adjusted, turn the clamping nut 207 to the right to release the pressure on the compression spring 205, and move the gear disc 204 to the right so that the gear disc 203 and the gear disc 204 engage with each other. 4. Complete separation allows the barrier curtain 201 to rotate freely up and down within the mounting bracket 1 as needed. After adjustment, the clamping nut 207 is rotated to the left to compress the compression spring 205, causing the second gear 204 to press tightly against the surface of the first gear 203, thereby locking the angle of the barrier curtain 201. The limiting piece 208 will block the clamping nut 207 when it is rotated to the right to a certain extent, preventing the clamping nut 207 from completely dislodging from the rotating shaft 202.
[0024] When the blocking mechanism 2 is working, since the filtering mechanism 3 is located on top of the blocking curtain 201, the blocking curtain 201 and the adjusting curtain 301 filter the ejected material from the stirring roller 4 through the through holes 303, thereby trapping the crop inside the blocking curtain 201 and throwing out smaller particles of impurities, thus performing preliminary separation and filtration of the harvested crop. Since the positions of the through holes 303 on the adjusting curtain 301 and the blocking curtain 201 are staggered, the sliding adjusting curtain 301 can change the passable area of the through holes 303, thereby adjusting the filter aperture according to the particle size of the impurities. When the locking bolt 305 is rotated downward, the end of the locking bolt 305 will press down on the extension curtain 302, thereby using friction to lock the position of the adjusting curtain 301 on the blocking curtain 201, ensuring the positional stability of the adjusting curtain 301.
[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A crop ejection prevention and agitator wheel baffle for a harvester, comprising: Mounting frame (1), stirring roller (4) and blocking mechanism (2); Its features are, The blocking mechanism (2) includes a blocking curtain (201), a rotating shaft (202), a first gear disc (203), a second gear disc (204), a compression spring (205), and a clamping nut (207). The rotating shaft (202) passes through the bottom front side of the mounting frame (1) and is rotatably connected to the mounting frame (1). The blocking curtain (201) is fixedly connected to the middle of the outer wall of the rotating shaft (202). The first gear disc (203) is fixedly connected to the bottom right outer wall of the mounting frame (1). The second gear disc (204) is slidably connected to the rotating shaft (202). The outer wall is located on the right side of the first gear (203). The left outer wall of the second gear (204) meshes with the right outer wall of the first gear (203). The compression spring (205) is sleeved on the right end of the rotating shaft (202) and located on the right side of the outer wall of the second gear (204). The right end of the outer wall of the rotating shaft (202) is provided with a threaded groove (206). The clamping nut (207) is threaded to the outer wall of the threaded groove (206). The left side of the clamping nut (207) abuts against the right end of the compression spring (205).
2. The harvester crop anti-ejection chaff curtain according to claim 1, characterized in that, The rightmost end of the rotating shaft (202) is fixedly connected to a limiting piece (208), the outer diameter of which is larger than the outer diameter of the threaded groove (206).
3. The crop anti-ejection baffle curtain for a harvester according to claim 1, characterized in that, The harvester crop anti-ejection stirring wheel baffle also includes a filter mechanism (3), which is located on the top of the baffle curtain (201). The top wall of the baffle curtain (201) is provided with a plurality of sliding grooves (306) at equal intervals. The filter mechanism (3) includes an adjusting curtain (301), which is slidably connected to the top of the baffle curtain (201) through the sliding grooves (306).
4. A harvester crop anti-ejection chaff curtain according to claim 3, characterized in that, Both the top of the outer wall of the barrier curtain (201) and the outer wall of the adjustable curtain (301) are provided with through holes (303). The positions of the through holes (303) on the adjustable curtain (301) and the through holes (303) on the barrier curtain (201) are staggered, and the through holes (303) penetrate the barrier curtain (201) and the adjustable curtain (301).
5. A harvester crop anti-ejection chaff curtain according to claim 3, characterized in that, The filter mechanism (3) further includes an extension curtain (302), which is fixedly connected to the front side of the adjustment curtain (301), and the bottom wall of the extension curtain (302) is in frictional engagement with the outer wall of the blocking curtain (201).
6. A harvester crop anti-ejection chaff curtain according to claim 5, characterized in that, The filter mechanism (3) further includes an extension curtain two (304), which is fixedly connected to the front side of the adjustment curtain (301). The extension curtain two (304) is located at the top of the extension curtain one (302) and directly above the extension curtain one (302).
7. A harvester crop anti-ejection agitator roller guard according to claim 6, characterized in that, The filter mechanism (3) also includes a locking bolt (305), the middle of which is threaded to the top wall of the second extension curtain (304), and the locking bolt (305) penetrates the second extension curtain (304).
8. A harvester crop anti-ejection agitator roller guard curtain according to claim 7, characterized in that, The bottom end of the locking bolt (305) is rotatably connected to the top of the extension curtain (302).