360-degree axial flow reverse speed change roller of corn thresher
By introducing a guide rail and screw structure into the drum screen of the corn thresher, combined with the design of the guide conveyor and the arc-shaped screen hole, the problems of high corn kernel breakage rate and complicated discharge port adjustment in traditional corn threshers are solved, achieving efficient threshing and easy adjustment.
Patent Information
- Application Number
- CN202520224064.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-06
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-02-06
AI Technical Summary
The traditional corn thresher's drum screen structure results in a high corn kernel breakage rate, high workload for the cleaning screen, and complex discharge port adjustment, which affects production efficiency.
Design a 360-degree axial flow reversing speed-changing drum. The discharge port opening is easily adjusted by using a guide rail and screw structure. Guide conveying iron is installed on the inner wall of the drum screen to reduce straw retention time. The drum screen holes are designed with an arc shape to reduce grain breakage.
It improved threshing quality, reduced corn kernel breakage rate, simplified discharge port adjustment operation, and increased operational efficiency.
Smart Images
Figure CN223859779U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to agricultural machinery, mainly relates to a kind of corn threshing cylinder. BACKGROUND
[0002] The traditional corn thresher cylinder screen is fixed on the frame or bracket, and there is no maintenance window. During operation, only the cylinder shaft rotates in the cylinder screen to squeeze and rub the corn. The squeezing effect is poor. During the threshing process, the cylinder shaft works alone. When the corn kernels are separated from the cob, they cannot fall into the cleaning screen through the holes on the cylinder screen immediately. The successfully separated corn kernels and cobs are squeezed repeatedly for a long time, resulting in damaged corn kernels and broken cobs. The cob debris falls into the cleaning screen together with the corn kernels, increasing the work intensity of the cleaning screen. If the corn with high moisture content is threshed, the damage rate is higher, and the blockage cannot be removed immediately.
[0003] To overcome the above-mentioned problems of the traditional technology, the applicant has developed a 360-degree axial flow reverse variable-speed cylinder for corn threshing, and obtained a utility model patent. This patented product has played a positive role and achieved good results in overcoming and solving the technical problems of traditional corn thresher. However, in years of production and operation practice, it is found that the product has the technical problems of complex discharge opening adjustment structure, tedious adjustment operation, slow stem discharge and transportation speed, affecting the production efficiency of the machine, and the cylinder screen is prone to seed damage, which needs to be overcome and solved. SUMMARY
[0004] The purpose of the utility model is to improve the design of a new structure of 360-degree axial flow reverse variable-speed cylinder for corn thresher to overcome the problems of the existing technology, meet the actual needs of corn threshing operation, simplify the discharge opening adjustment structure, facilitate adjustment operation, improve operation efficiency, and reduce and avoid seed damage.
[0005] The basic design of the utility model is as follows: two vertical guide rails are symmetrically installed on the outer wall of the discharge outlet baffle. The discharge opening adjustment plate is reciprocally movable and installed between the two guide rails. A double screw is rotatably installed horizontally on the lower part of the discharge outlet baffle. The left and right threaded nuts are rotatably and axially movable on both sides of the double screw. The left and right connecting rods are hinged to the discharge opening adjustment plate and the left and right threaded nuts. A hand wheel is installed on one side of the double screw. Thus, a 360-degree axial flow reverse variable-speed cylinder for corn threshing is formed.
[0006] The utility model has novel, reasonable and simple structure, easy and convenient adjustment operation, high threshing operation efficiency, good threshing quality and low seed damage rate.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS
[0007] Figure 1 is the overall structure schematic diagram of the 360-degree axial flow reverse variable speed cylinder of the corn thresher;
[0008] Figure 2 is Figure 1 A-A sectional view of the corn thresher;
[0009] Figure 3 is Figure 2 B part of the corn thresher;
[0010] Figure 4 is Figure 3 C-C sectional view of the corn thresher;
[0011] Figure 5 is the three-dimensional view of the overall structure of the 360-degree axial flow reverse variable speed cylinder of the corn thresher.
[0012] Explanation of reference numerals in the drawing:
[0013] 1, cylinder screen, 1-1, screen hole, 2, guide conveying iron, 3, upper baffle of discharge port, 4, lower baffle of discharge port, 5, guide rail, 6, opening adjustment plate of discharge port, 7, right connecting rod, 8, right-hand nut, 9, left-hand nut, 10, bidirectional screw rod, 11, left connecting rod, 12, hand wheel. DETAILED DESCRIPTION
[0014] The embodiments of the present application will be described in detail below with reference to the accompanying drawings. A 360-degree axial flow reverse variable speed cylinder of a corn thresher comprises a rotatable cylinder screen 1, an upper baffle 3 and a lower baffle 4 of a discharge port are fixedly arranged at the discharge end of the cylinder screen 1, guide rails 5 are vertically fixed on the outer wall of the lower baffle 4 in a symmetrical manner, an opening adjustment plate 6 of the discharge port is reciprocally arranged between the guide rails 5, a bidirectional screw rod 10 is horizontally installed below the guide rails 5, left-hand nuts 9 and right-hand nuts 8 are rotatably and axially movably arranged on both sides of the bidirectional screw rod 10, left connecting rods 11 and right connecting rods 7 are hingedly connected to the opening adjustment plate 6 and the left-hand nuts 9 and the right-hand nuts 8, and a hand wheel 12 is fixedly arranged on one end of the bidirectional screw rod 10. A plurality of guide conveying irons 2 are arranged in a spiral line on the inner wall of the cylinder screen 1. The transition connection angle between the hole wall of the screen hole 1-1 on the cylinder screen 1 and the inner wall of the cylinder screen 1 is in the form of a circular arc surface.
[0015] During operation, the cylinder screen 1 of the reversing speed change cylinder utilizes the guide conveying iron 2 on the inner wall surface to rapidly convey the threshed straw to the discharge port, reduces the residence flow and residence time of the threshed straw in the cylinder screen 1, and guarantees the operation efficiency; when the threshed corn kernels enter the screen hole 1-1 from the inner cavity of the cylinder screen 1, the arc surface-shaped angle reduction avoids the crushing of the entering seeds, and reduces the kernel breakage rate; when it is necessary to adjust the opening size of the discharge port, the hand wheel 12 is rotated by hand, the left and right screw nuts 9 and 8 are driven to move in the opposite directions on the bidirectional screw rod 10, the left and right connecting rods 11 and 7 are synchronously driven to move the opening adjusting plate 6 of the discharge port up and down on the guide rail 5, and the opening size of the discharge port is adjusted, which is simple, convenient and fast.
Claims
1. A 360-degree axial flow reversing speed-changing drum for a corn thresher, comprising a rotatable drum screen (1), wherein an upper baffle (3) and a lower baffle (4) are fixedly disposed at the discharge end of the drum screen (1), characterized in that: Symmetrically mounted vertical guide rails (5) are fixed on the outer wall of the lower baffle (4) of the discharge port. The discharge port opening adjustment plate (6) is mounted on the part between the relatively arranged guide rails (5) and can move up and down. A bidirectional screw (10) is rotatably mounted on the part of the lower baffle (4) below the guide rail (5). The left-hand nut (9) and the right-hand nut (8) are respectively fitted on the two sides of the bidirectional screw (10) and can rotate relative to each other and move axially. The two ends of the left connecting rod (11) and the right connecting rod (7) are respectively hinged to the discharge port opening adjustment plate (6) and the left-hand nut (9) and the discharge port opening adjustment plate (6) and the right-hand nut (8). The handwheel (12) is fixed on one end of the bidirectional screw (10).
2. The 360-degree axial flow reversing speed-changing drum of the corn thresher according to claim 1, characterized in that: Multiple guide conveyor irons (2) are arranged and installed in a spiral pattern along the axial direction on the inner wall surface of the drum screen (1).
3. The 360-degree axial flow reversing speed-changing drum of the corn thresher according to claim 1, characterized in that: The transition corner between the screen hole (1-1) wall and the inner wall of the drum screen (1) is rounded.