Fixed cutter fine adjusting mechanism
Through the cooperation of the rotating screw and the cylindrical pin shaft, the fine adjustment of the fixed tool holder is driven, and the problem of not fine adjustment of the fixed tool and the moving tool gap is solved, and the efficient chopping effect is achieved, ensuring the accuracy of the fixed tool and the moving tool gap is achieved. control.
Patent Information
- Application Number
- CN202420961095.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-05-07
AI Technical Summary
In the prior art, the gap adjustment between the fixed knife and the moving knife is not fine, resulting in the reduction of the chopping efficiency of the corn harvester after a long time of work, and the straw cannot be effectively cut off, and the gap changes are easily caused by inertia and external forces, and the error is large.
The rotating screw is used to drive the cylindrical pin shaft and rocker arm movement, and the fine adjustment of the fixed tool holder is achieved through the rotating pin shaft. Combined with the threaded cooperation of the screw and the cylindrical pin shaft, the clearance of the fixed tool and the moving tool is accurately adjusted, and locked through the anti-turn plate Screw position to prevent gap changes.
The precise adjustment of the gap between the fixed knife and the moving knife is achieved, and it is maintained within 0.3mm, avoiding gap changes caused by inertia and external forces, and improving the chopping efficiency and accuracy of the shredder.
Smart Images
Figure CN222216542U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of agricultural machinery, and in particular relates to a fixed knife fine adjustment mechanism. Background Art
[0002] When harvesting silage, corn stalks or forage grasses are fed into the chopper through the feeding system for chopping, and then the chopped materials are thrown out and collected through the throwing device. The chopper needs a fixed blade and a moving blade to cooperate to chop the stalks, and a good chopping effect of the stalks is achieved by adjusting the gap between the fixed blade and the moving blade. In the actual working process, the gap between the fixed blade and the moving blade usually increases with the extension of working time, thereby reducing the chopping quality of the stalks, or even failing to cut the stalks. Therefore, it is necessary to adjust the gap between the fixed blade and the moving blade after the corn harvester has been working for a long time to ensure the efficiency of the chopper in chopping the stalks.
[0003] Patent CN212696754U discloses a fixed blade adjustment device for a forage crop harvester, including a fixed blade seat for mounting a fixed blade, a pivot seat hinged to the fixed blade seat by a pivot shaft, and a driving device for driving the fixed blade seat to rotate around the pivot shaft, the pivot seat is fixedly connected to the roller pad, the pivot shaft is parallel to the roller axis, and the adjustment of the gap between the fixed blade and the moving blade is achieved by rotating the fixed blade seat. However, when the linear motor controls the movement of the fixed blade, when the linear motor is turned off, due to inertia, the fixed blade seat may continue to rotate a certain distance, changing the gap between the fixed blade and the moving blade, and when there are other external forces, the gap between the fixed blade and the moving blade may also be changed, resulting in imprecise adjustment of the gap between the fixed blade and the moving blade, and large errors. Therefore, it is necessary to develop a fixed blade fine adjustment mechanism that can finely adjust the gap between the fixed blade and the moving blade. Utility Model Content
[0004] In order to solve the existing technical problems, the utility model provides a fixed knife fine adjustment mechanism, which drives the cylindrical pin and the rocker arm to move along the axial direction of the screw by rotating the screw, and then drives the fixed knife seat to rotate around the rotating pin, so as to adjust the gap between the fixed knife and the moving knife accurately.
[0005] The technical scheme of the utility model is: a fixed knife fine adjustment mechanism, comprising a screw, a fixed seat, an arc piece, a linear bearing, an anti-rotation plate, a rocker arm, a hanging ear, a cylindrical pin, a pull rod, a fixed knife seat, a chopper shell, a U-shaped groove and a rotating pin; one end of the screw is installed in the fixed seat, the fixed seat is fixed to the side wall of the chopper shell, the two sides of the fixed seat are clamped by the arc piece, the linear bearing is installed on the outside of the arc piece, the arc piece and the linear bearing are installed on the screw, and the linear bearing is fixed to the screw by a nut, and the other end of the screw An anti-rotation plate is installed after one end passes through the cylindrical pin shaft, and the anti-rotation plate is tightly pressed against the side wall of the chopper housing; a thread is arranged inside the cylindrical pin shaft, and the thread is adapted to the screw rod; both ends of the cylindrical pin shaft are fixedly connected to the hanging ears, the upper part of the rocker arm is fixedly connected to the hanging ears, the lower part of the rocker arm is fixedly connected to the fixed knife seat, and the bottom of the fixed knife seat is rotatably installed in the U-shaped groove through a rotating pin shaft, and the U-shaped groove is fixed on the chopper housing, the pull rod extends longitudinally, a through hole is arranged on the upper part of the pull rod, the rotating pin shaft passes through the through hole of the pull rod, and the lower part of the pull rod is fixed to the chopper housing.
[0006] Furthermore, a disc spring is arranged between the linear bearing on the outer side of the fixing seat and the nut, and the disc spring is mounted on the screw rod.
[0007] Furthermore, one end of the screw rod adjacent to the anti-rotation plate is configured as a square head structure.
[0008] Furthermore, a U-shaped copper sleeve is arranged between the U-shaped groove and the rotating pin shaft.
[0009] Furthermore, the pull rod and the chopper housing are fixed by a nut, a disc spring is arranged between the nut and the chopper housing, and the disc spring is mounted on the pull rod.
[0010] Furthermore, the middle and lower part of the rocker arm is fixedly connected to the chopper housing by fastening bolts.
[0011] Furthermore, the fixing seat clamps the screw rod in a radial direction of the screw rod.
[0012] Furthermore, the screw rod is installed on the left and right sides of the fixed knife seat.
[0013] When the fixed knife fine adjustment mechanism of the utility model is working, when it is necessary to adjust the gap between the fixed knife and the movable knife, the square heads of the screws on both sides of the fixed knife seat are rotated to drive the screws to rotate. Since the screws are positioned on the chopper housing through the fixed seat and the linear bearing, the axial position of the screws remains unchanged. The rotation of the screws drives the cylindrical pin shaft to move forward and backward along the axial direction of the screw. The cylindrical pin shaft drives the rocker arm to move forward and backward along the axial direction of the screw. The rocker arm transmits the force to the fixed knife seat. The bottom of the fixed knife seat is positioned in On the shredder housing, the fixed knife seat is subjected to the force of the rocker arm and rotates around the rotating pin. The fixed knife is installed on the upper end of the fixed knife seat, thereby realizing the movement of the fixed knife. The moving knife is installed in the shredder housing inside the two screws. When the fixed knife and the fixed knife seat rotate around the rotating pin, the gap between the fixed knife and the moving knife changes, thereby realizing the adjustment of the gap between the fixed knife and the moving knife, so that the gap between the fixed knife and the moving knife is kept within 0.3mm. After the adjustment is completed, the anti-rotation plate is inserted to lock the screw to prevent the gap between the fixed knife and the moving knife from changing. When the gap between the fixed knife and the moving knife is adjusted, the rocker arm is positioned on the shredder housing by tightening the bolts, thereby fixing the position of the fixed knife seat and the fixed knife to prevent the fixed knife position from moving under the action of external force, resulting in a change in the gap between the fixed knife and the moving knife.
[0014] By adopting the above technical solution, the beneficial effects achieved by the utility model are as follows:
[0015] The utility model drives the cylindrical pin and the rocker arm to move along the axial direction of the screw by rotating the screw, and then drives the fixed knife seat to rotate around the rotating pin to adjust the gap between the fixed knife and the moving knife; through the threaded cooperation of the screw and the cylindrical pin and the manual rotation of the screw to achieve the movement of the cylindrical pin, the rotation position of the fixed knife seat can be accurately and meticulously achieved, and then the fine adjustment of the position of the fixed knife can be achieved, and finally the accurate and meticulous adjustment of the gap between the fixed knife and the moving knife can be achieved. The position of the screw is locked by the anti-rotation plate to prevent the position of the fixed knife from changing, to avoid the change of the gap between the fixed knife and the moving knife caused by the rotation inertia of the screw and the fixed knife seat, and to avoid the change of the position of the fixed knife caused by misoperation. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the utility model;
[0017] Figure 2 It is a side view of the utility model;
[0018] Figure 3 It is a schematic diagram of the installation structure of the utility model.
[0019] In the figure, screw 1, fixed seat 2, arc sheet 3, linear bearing 4, anti-rotation plate 5, rocker arm 6, hanging ear 7, cylindrical pin 8, pull rod 9, fixed knife seat 10, chopper housing 11, U-shaped groove 12, rotating pin 13, disc spring 14, U-shaped copper sleeve 15, fastening bolt 16, fixed knife 17, movable knife 18, nut 19. DETAILED DESCRIPTION
[0020] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Example
[0021] Reference Figure 1-3 A fixed knife fine adjustment mechanism includes a screw rod 1, a fixed seat 2, an arc piece 3, a linear bearing 4, an anti-rotation plate 5, a rocker arm 6, a hanging ear 7, a cylindrical pin 8, a pull rod 9, a fixed knife seat 10, a chopper housing 11, a U-shaped groove 12 and a rotating pin 13; one end of the screw rod 1 is installed in the fixed seat 2, the fixed seat 2 is fixed on the side wall of the chopper housing 11, both sides of the fixed seat 2 are clamped by the arc piece 3, the linear bearing 4 is installed on the outside of the arc piece 3, the arc piece 3 and the linear bearing 4 are installed on the screw rod 1, and the linear bearing 4 is fixed to the screw rod 1 by a nut 19, and the other end of the screw rod 1 passes through An anti-rotation plate 5 is installed behind the cylindrical pin 8, and the anti-rotation plate 5 is tightly pressed against the side wall of the chopper housing 11; a thread is arranged inside the cylindrical pin 8, and the thread is adapted to the screw 1, and both ends of the cylindrical pin 8 are fixedly connected to the hanging ears 7, the upper part of the rocker arm 6 is fixedly connected to the hanging ears 7, the lower part of the rocker arm 6 is fixedly connected to the fixed knife seat 10, and the bottom of the fixed knife seat 10 is rotatably installed in the U-shaped groove 12 through a rotating pin 13, and the U-shaped groove 12 is fixed on the chopper housing 11, the pull rod 9 extends longitudinally, and a through hole is arranged on the upper part of the pull rod 9, and the rotating pin 13 passes through the through hole of the pull rod 9, and the lower part of the pull rod 9 is fixed to the chopper housing 11.
[0022] When the screw 1 rotates, the screw 1 is positioned on the chopper housing 11 through the linear bearing 4 and the fixed seat 2. The rotation of the screw 1 drives the cylindrical pin 8 to move along the axial direction of the screw 1. The cylindrical pin 8 drives the rocker arm 6 to move, and then drives the fixed knife seat 10 to move. Since the bottom of the fixed knife seat 10 is positioned on the chopper housing 11 through the pull rod 9, the fixed knife seat 10 rotates around the rotating pin 8 after receiving the force of the rocker arm 6, so that the gap between the fixed knife 17 and the movable knife 18 installed on the upper part of the fixed knife seat 10 changes.
[0023] The rotating pin 13 is the rotating point below the fixed knife seat 10 . The fixed knife seat 10 can rotate along the rotating pin 13 in the U-shaped groove 12 by cooperating with the U-shaped groove 12 and being fixed by the pull rod 9 .
[0024] Furthermore, a disc spring 14 is arranged between the linear bearing 4 and the nut 19 outside the fixing seat 2, and the disc spring 14 is mounted on the screw rod 1. The disc spring 14 absorbs the vibration of the fixed knife 17.
[0025] Furthermore, one end of the screw rod 1 adjacent to the anti-rotation plate 5 is configured as a square head structure. The square head structure facilitates the use of tools to rotate the screw rod 1, saving time and effort in the operation.
[0026] Furthermore, a U-shaped copper sleeve 15 is provided between the U-shaped groove 12 and the rotating pin 13. The U-shaped copper sleeve 15 reduces the friction force when the fixed knife seat 10 rotates around the rotating pin 13, and performs shock absorption and lubrication.
[0027] Further, the pull rod 9 and the chopper housing 11 are fixed by a nut 19, a disc spring 14 is arranged between the nut 19 and the chopper housing 11, and the disc spring 14 is mounted on the pull rod 9. The disc spring 14 is added at the connection of the mechanism to absorb the vibration when the mechanism is working.
[0028] Furthermore, the lower middle portion of the rocker arm 6 is fixedly connected to the chopper housing 11 by fastening bolts 16 .
[0029] Furthermore, the fixing seat 2 clamps the screw rod 1 in the radial direction of the screw rod 1. By adjusting the angle of the fixing seat 2, the screw rod 1 can be rotated around the fixing seat 2 and the angle of the screw rod 1 can be adjusted.
[0030] Furthermore, the screw rod 1 is installed on the left and right sides of the fixed knife seat 10. By rotating the screw rods 1 on both sides, the rocker arm 6 is driven to move forward and backward along the axial direction of the screw rod 1, thereby realizing the movement of the fixed knife seat 10.
[0031] When a fixed knife fine adjustment mechanism of the utility model is working, when it is necessary to adjust the gap between the fixed knife 17 and the movable knife 18, the square heads of the screws 1 on both sides of the fixed knife seat 10 are rotated to drive the screws 1 to rotate. Since the screws 1 are positioned on the chopper housing 11 through the fixed seat 2 and the linear bearing 4, the axial position of the screws 1 remains unchanged. The rotation of the screws 1 drives the cylindrical pin 8 to move forward and backward along the axial direction of the screw 1. The cylindrical pin 8 drives the rocker 6 to move forward and backward along the axial direction of the screw 1. The rocker 6 transmits the force to the fixed knife seat 10. The bottom of the fixed knife seat 10 is positioned on the chopper housing 11 through the pull rod 9. After the fixed knife seat 10 is subjected to the force of the rocker arm 6, it rotates around the rotating pin 13, and the fixed knife 17 is installed on the upper end of the fixed knife seat 10, so that the fixed knife 17 can be moved. The movable knife 18 is installed in the shredder housing 11 inside the two screws 1. When the fixed knife 17 and the fixed knife seat 10 rotate around the rotating pin 13, the gap between the fixed knife 17 and the movable knife 18 changes, so that the gap between the fixed knife 17 and the movable knife 18 is adjusted, so that the gap between the fixed knife 17 and the movable knife 18 is kept within 0.3mm. After the adjustment is completed, the anti-rotation plate 5 is inserted to lock the screw 1 to prevent the gap between the fixed knife 17 and the movable knife 18 from changing. After the gap between the fixed knife 17 and the movable knife 18 is adjusted, the rocker arm 6 is positioned on the shredder housing 11 by tightening the bolt 16, so that the position of the fixed knife seat 10 and the fixed knife 17 is fixed to prevent the position of the fixed knife 17 from moving under the action of external force, resulting in a change in the gap between the fixed knife 17 and the movable knife 18.
Claims
1. A fixed knife fine adjustment mechanism, characterized in that: The invention comprises a screw rod (1), a fixing seat (2), an arc-shaped sheet (3), a linear bearing (4), an anti-rotation plate (5), a rocker arm (6), a hanging ear (7), a cylindrical pin shaft (8), a pull rod (9), a fixed knife seat (10), a chopper housing (11), a U-shaped groove (12) and a rotating pin shaft (13); one end of the screw rod (1) is mounted in the fixing seat (2), the fixing seat (2) is fixed on the side wall of the chopper housing (11), both sides of the fixing seat (2) are clamped by the arc-shaped sheet (3), the linear bearing (4) is mounted on the outer side of the arc-shaped sheet (3), the arc-shaped sheet (3) and the linear bearing (4) are mounted on the screw rod (1), and the linear bearing (4) is fixed on the screw rod (1) by a nut (19), and the other end of the screw rod (1) passes through the cylindrical An anti-rotation plate (5) is installed behind the pin shaft (8), and the anti-rotation plate (5) is tightly pressed against the side wall of the chopper housing (11); a thread is arranged inside the cylindrical pin shaft (8), and the thread is matched with the screw rod (1); both ends of the cylindrical pin shaft (8) are fixedly connected to the hanging ears (7), the upper part of the rocker arm (6) is fixedly connected to the hanging ears (7), the lower part of the rocker arm (6) is fixedly connected to the fixed knife seat (10), and the bottom of the fixed knife seat (10) is rotatably installed in the U-shaped groove (12) through a rotating pin shaft (13), and the U-shaped groove (12) is fixed on the chopper housing (11); the pull rod (9) extends longitudinally, and a through hole is arranged on the upper part of the pull rod (9), and the rotating pin shaft (13) passes through the through hole of the pull rod (9), and the lower part of the pull rod (9) is fixed to the chopper housing (11).
2. A fixed knife fine adjustment mechanism according to claim 1, characterized in that: A disc spring (14) is arranged between the linear bearing (4) and the nut (19) outside the fixing seat (2), and the disc spring (14) is mounted on the screw rod (1).
3. A fixed knife fine adjustment mechanism according to claim 1, characterized in that: One end of the screw rod (1) adjacent to the anti-rotation plate (5) is configured as a square head structure.
4. The fixed knife fine adjustment mechanism according to claim 1, characterized in that: A U-shaped copper sleeve (15) is provided between the U-shaped groove (12) and the rotating pin shaft (13).
5. The fixed knife fine adjustment mechanism according to claim 1, characterized in that: The pull rod (9) and the chopper housing (11) are fixed by a nut (19); a disc spring (14) is arranged between the nut (19) and the chopper housing (11); and the disc spring (14) is mounted on the pull rod (9).
6. The fixed knife fine adjustment mechanism according to claim 1, characterized in that: The middle and lower part of the rocker arm (6) is fixedly connected to the chopper housing (11) by means of a fastening bolt (16).
7. The fixed knife fine adjustment mechanism according to claim 1, characterized in that: The fixing seat (2) clamps the screw rod (1) in the radial direction of the screw rod (1).
8. A fixed knife fine adjustment mechanism according to claim 1 or 3, characterized in that: The screw rod (1) is mounted on the left and right sides of the fixed knife seat (10).