A seeder air pressure stabilizing device

Abstract

This invention discloses a wind pressure stabilizing device for a seeder, comprising a connecting frame, a tail cylinder, a motion conversion mechanism, an air duct, a pressure stabilizing body, a rubber pad, an R-shaped pin, a lead screw, a frustum, and a compression spring. The connecting frame includes a connecting cylinder, a support frame, and a rear cover for the air duct. The tail cylinder is disposed on the connecting cylinder. The support frame connects the connecting cylinder and the rear cover for the air duct together. One end of the motion conversion mechanism is disposed inside the connecting cylinder, and the other end is disposed outside the connecting cylinder. Both ends of the air duct are respectively disposed on the front cover for the air duct and the motion conversion mechanism outside the connecting cylinder. The rubber pad is in contact with the frustum and is disposed on the rear cover for the air duct. The compression spring is disposed between the frustum and the lead screw. The pressure stabilizing body is in contact with the rubber pad. The compression spring and the frustum are disposed inside the pressure stabilizing body. One end of the lead screw is disposed inside the pressure stabilizing body, and the other end is disposed outside the pressure stabilizing body. The R-shaped pin is disposed on the lead screw.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, and in particular to a wind pressure stabilizing device for a seeder. Background Technology

[0002] In agricultural production, air-suction seeders are widely used due to their advantages such as high sowing precision and minimal seed damage. However, existing air-suction seeders often experience unstable system air pressure during operation due to unstable power output from the tractor connected to the seeder. Air pressure fluctuations directly affect seeding and placement, causing problems such as missed sowing, double sowing, or sowing position deviation, thereby reducing sowing uniformity and impacting agricultural yield. Currently, there is no device on the market that can directly stabilize the air pressure of a seeder. This invention provides a seeder air pressure stabilization device to solve the problems existing in the prior art. Summary of the Invention

[0003] The purpose of this invention is to provide a seeder wind pressure stabilizing device to solve the problems existing in the prior art. In the process of stabilizing the wind pressure of the seeder, only a small adjustment through a simple mechanical structure is needed to achieve the effect of stabilizing the wind pressure.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides a wind pressure stabilizing device for a seeder, comprising a connecting frame, a fan, a tail cylinder, a motion conversion mechanism, a first pipe joint, a first air pipe, an air duct, a pressure stabilizer, a rubber pad, a second pipe joint, a square tube, a second air pipe, an R-shaped pin, a lead screw, a third pipe joint, a frustum, a compression spring, a third bolt, a second washer, and a third nut. The connecting frame includes a connecting cylinder, a support frame, and an air duct rear cover. One end of the connecting cylinder is disposed on the tail cylinder, and the other end is connected to the fan. The support frame connects the connecting cylinder and the air duct rear cover together. The first pipe joint is detachably connected to the connecting cylinder. One end of the motion conversion mechanism is disposed inside the connecting cylinder, and the other end is disposed outside the connecting cylinder. The air duct is sleeved on the air duct rear cover and the... In the motion conversion mechanism, the second pipe connector is detachably connected to the rear cover of the air duct, and both ends of the first air pipe are respectively connected to the first pipe connector and the second pipe connector. The rubber pad fits against the frustum and is connected to the rear cover of the air duct through the second washer and the third nut. The compression spring is disposed between the frustum and the lead screw. The pressure stabilizing body is disposed on the rubber pad and is connected to the rear cover of the air duct through the third bolt. The compression spring and the frustum are disposed inside the pressure stabilizing body. The third pipe connector is detachably connected to the pressure stabilizing body, and one end of the second air pipe is connected to the third pipe connector and the other end is connected to the square tube. One end of the lead screw is disposed inside the pressure stabilizing body and the other end is disposed outside the pressure stabilizing body. The R-pin is disposed on the lead screw.

[0005] Preferably, the connecting cylinder is a straight cylinder structure with a flange at one end. The flange is used to connect the fan, and a first threaded hole is provided near the flange. The first pipe joint is detachably connected to the first threaded hole. The connecting cylinder has two slots radially located away from the flange end face. The tail cylinder is welded to the end face away from the flange. The connecting cylinder has a limiting groove near the flange. One end of the support frame is symmetrically arranged on both sides of the limiting groove, and the other end is fixedly connected to the rear cover of the air duct.

[0006] Preferably, the motion conversion mechanism includes: a baffle, a first washer, a first bolt, a first nut, a push rod, a second bolt, a second nut, and a duct front cover. The baffle has a disc-shaped structure with radially symmetrical cylindrical bosses. One plane of the disc is perpendicular to the cylindrical bosses, and a triangular boss is located near the center. The first washer is fitted onto each of the two cylindrical bosses. The cylindrical bosses are positioned within the slots, allowing the baffle to rotate only within the connecting cylinder. The push rod passes through the limiting groove and extends into the connecting cylinder. The boss has a through hole at the corner away from the baffle. One end of the push rod is set in the through hole of the triangular boss by the first bolt and the first nut. The push rod rotates around the first bolt. The front cover of the air duct has a through hole in the center. The second bolt and the second nut pass through the center hole on the front cover of the air duct and are connected to the push rod. The two ends of the air duct are respectively fitted on the front cover of the air duct and the rear cover of the air duct. The front cover of the air duct, the air duct and the rear cover of the air duct form a closed cavity structure.

[0007] Preferably, the support frame has two symmetrical limiting surfaces, which limit the excessive movement of the front cover of the duct.

[0008] Preferably, the movement of the air duct back and forth drives the movement of the air duct front cover and the push rod, causing the baffle connected to the push rod to rotate in the connecting cylinder, thereby changing the opening and closing degree of the baffle in the connecting cylinder.

[0009] Preferably, the duct back cover has a second threaded hole located away from the center, and the second pipe connector is detachably connected to the second threaded hole. The duct back cover has a boss with four evenly distributed third threaded holes and a through hole in the center. One end of the truncated cone has a thread, and the other end has a disc near the end face. The threaded end passes through the rubber gasket and the through hole on the duct back cover, and is connected by the second washer and the third nut. One end of the lead screw has a pressure plate, and the other end has a thread and a through hole in a radial position. The R-pin is disposed in the through hole. The pressure stabilizer has four evenly distributed third threaded holes. The pressure stabilizer has distributed through holes and a fourth threaded hole at the center. A fifth threaded hole is provided on the side of the pressure stabilizer. The third pipe connector is detachably connected to the fifth threaded hole. One end of the lead screw with a pressure plate is placed in the fourth threaded hole, and the other end with threads is placed outside the pressure stabilizer. The compression spring is disposed inside the pressure stabilizer. The two ends of the compression spring are respectively sleeved on the frustum and the lead screw. The pressure stabilizer is attached to the rubber pad, and the hole position of the pressure stabilizer is aligned with the hole position on the rubber pad and the air duct back cover. It is connected by the third bolt. The pressure stabilizer, the rubber pad and the air duct back cover form a sealed cavity structure.

[0010] Preferably, when the device is in operation, when the lead screw is screwed in, the lead screw compresses the compression spring, causing the compression spring to generate elastic force, which pushes the second gasket on the back cover of the air duct to move, so that a gap is created between the second gasket and the back cover of the air duct. When the suction force generated by the air pressure is equal to the elastic force generated by the compression spring, the second gasket adheres to the back cover of the air duct, thereby increasing the air pressure.

[0011] When the lead screw is turned out, the elastic force generated by the compression spring decreases, and the suction force required to balance the wind pressure also decreases, thereby reducing the wind pressure. Since the elastic force generated by the compression spring remains constant under the same compression, stable wind pressure is achieved.

[0012] Preferably, the diameter of the compression spring wire is between 1 and 2.2 mm, and the free length is between 25 and 100 mm.

[0013] More preferably, the wire diameter of the compression spring is approximately 1.2 mm and the free length is approximately 40 mm.

[0014] The wind pressure stabilizing device for a seeder disclosed in this invention achieves the following technical advantages compared to existing technologies:

[0015] This invention provides a wind pressure stabilizing device for seeders, suitable for situations where the wind pressure of the fan is unstable or dynamic stabilization is difficult. Adjusting the wind pressure is simple and convenient, requiring only manual adjustment. This device is simple, practical, and has broad application prospects. Attached image description:

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a wind pressure stabilizing device for a seeder.

[0018] Figure 2 A cross-sectional view of a wind pressure stabilizing device for a seeder.

[0019] Figure 3 This is a schematic diagram of a connecting frame structure for a seeder's air pressure stabilizing device.

[0020] Figure 4 A schematic diagram of the pressure stabilizing body structure of a seeder wind pressure stabilizing device.

[0021] Figure 5 A schematic diagram of the motion conversion mechanism of a seeder's wind pressure stabilization device.

[0022] Figure 6 A schematic diagram of a baffle structure for a seeder's air pressure stabilizing device.

[0023] Figure 7 A schematic diagram of a frustum structure for a seeder's air pressure stabilization device.

[0024] Among them, 1-connecting frame, 101-connecting cylinder, 1011-first threaded hole, 1012-limiting groove, 1013-slot, 102-support frame, 1021-limiting surface, 103-duct rear cover, 1031-second threaded hole, 1032-third threaded hole, 2-fan, 3-tail cylinder, 4-motion conversion mechanism, 401-baffle, 4011-cylindrical boss, 4012-triangular boss, 402-first nut, 403-first bolt, 404-first washer. 405-Push rod, 406-Second bolt, 407-Second nut, 408-Duct front cover, 5-First pipe connector, 6-First air pipe, 7-Square tube, 8-Second pipe connector, 9-Second air pipe, 10-Third pipe connector, 11-R-pin, 12-Lead screw, 13-Third bolt, 14-Rubber pad, 15-Pressure stabilizer, 1501-Fourth threaded hole, 1502-Fifth threaded hole, 16-Duct, 17-Compression spring, 18-Frustum, 19-Second washer, 20-Third nut Detailed implementation method:

[0025] The technical solutions of the embodiments of the present invention 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 the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0026] The purpose of this invention is to provide a wind pressure stabilizing device for a seeder to solve the problems existing in the prior art. It is applicable to the problem of reduced seeding accuracy caused by wind pressure fluctuations in pneumatic seeders. When adjusting the wind pressure of the fan, only the lead screw needs to be manually adjusted, which is simple and convenient. Moreover, no secondary adjustment is required after the wind pressure is stabilized, which effectively improves work efficiency.

[0027] like Figure 1 , 3 As shown, the connecting frame 1 includes a connecting cylinder 101, a support frame 102, and a duct back cover 103. The connecting cylinder 101 is a straight cylinder structure with a flange at one end. The flange is used to connect the fan 2, and a first threaded hole 1011 is provided near the flange. The first pipe joint 5 is detachably connected to the first threaded hole 1011. The connecting cylinder 101 has two slots 1013 radially provided at the end face away from the flange. The tail cylinder 3 is welded to the end face away from the flange. The connecting cylinder 101 has a limiting groove 1012 near the flange. One end of the support frame 102 is symmetrically arranged on both sides of the limiting groove 1012, and the other end is fixedly connected to the duct back cover 103.

[0028] like Figure 1 , 3As shown in Figures 5 and 6, the motion conversion mechanism 4 includes: a baffle 401, a first nut 402, a first bolt 403, a first washer 404, a push rod 405, a second bolt 406, a second nut 407, and a duct front cover 408. The baffle 401 has a disc structure and is radially symmetrically provided with cylindrical bosses 4011. One plane of the disc is perpendicular to the cylindrical bosses 4011 and a triangular boss 4012 is provided near the center. The first washer 404 is fitted on each of the two cylindrical bosses 4011. The cylindrical bosses 4011 are disposed in the slot 1013, so that the baffle 401 can only rotate within the connecting cylinder 101. The push rod 405 passes through the limiting groove 1012 and extends into the connecting cylinder. Inside 101, the triangular boss 4012 has a through hole at the corner away from the baffle 401. One end of the push rod 405 is set in the through hole on the triangular boss 4012 by the first bolt 403 and the first nut 402. The push rod 405 rotates around the first bolt 403. The front cover 408 of the air duct has a through hole at its center. The second bolt 406 and the second nut 407 pass through the center hole on the front cover 408 of the air duct and are connected to the push rod 405. The two ends of the air duct 16 are respectively sleeved on the front cover 408 of the air duct and the rear cover 103 of the air duct. The front cover 408 of the air duct, the air duct 16 and the rear cover 103 of the air duct form a closed cavity structure.

[0029] like Figure 1 , 3 As shown in Figure 5, the support frame 102 has two symmetrical limiting surfaces 1021, which limit the excessive movement of the front cover 408 of the air duct.

[0030] like Figure 1 , 3 As shown in Figure 5, the front cover 408 of the air duct 16 and the push rod 405 are driven to move by the back and forth movement of the air duct 16, so that the baffle 401 connected to the push rod 405 rotates in the connecting cylinder 101.

[0031] like Figure 1 , 2As shown in Figures 3, 4, 5, and 7, the duct back cover 103 has a second threaded hole 1031 located away from the center. The second pipe connector 8 is detachably connected to the second threaded hole 1031 on the duct back cover 103. The first air pipe 6 is fitted onto the first pipe connector 5 and the second pipe connector 8 at both ends. The duct back cover 103 has a boss with four evenly distributed third threaded holes 1032 and a through hole in the center. The frustum 18 has a thread at one end and a disc near the end face at the other end. The threaded end passes through the rubber pad 14 and the through hole on the duct back cover 103, and is connected by the second washer 19 and the third nut 20. The lead screw 12 has a pressure plate at one end and a thread at the other end with a through hole in the radial position. The R-shaped pin 11 is disposed in the through hole. The pressure stabilizer 15 has four evenly distributed through holes and a through hole in the radial position. The fourth threaded hole 1501 is located in the center, and the fifth threaded hole 1502 is provided on the side of the pressure stabilizer 15. The third pipe connector 10 is detachably connected to the fifth threaded hole 1502 on the pressure stabilizer 15. One end of the second air pipe 9 is connected to the third pipe connector 10, and the other end is connected to the square tube 7. One end of the lead screw 12 with a pressure plate is placed in the fourth threaded hole 1501, and the threaded end is placed outside the pressure stabilizer 15. The compression spring 17 is disposed inside the pressure stabilizer 15. The two ends of the compression spring 17 are respectively sleeved on the frustum 18 and the lead screw 12. The pressure stabilizer 15 is attached to the rubber pad 14, and the hole position of the pressure stabilizer 15 is aligned with the hole positions on the rubber pad 14 and the air duct back cover 103. It is connected by the third bolt 13. The pressure stabilizer 15, the rubber pad 14 and the air duct back cover 103 form a sealed cavity structure.

[0032] like Figure 1 , 2 As shown in Figure 3, when the device is in operation, when the lead screw 12 is screwed in, the lead screw 12 compresses the compression spring 17, causing the compression spring 17 to generate elastic force, which pushes the second gasket 19 on the air duct rear cover 103 to move, so that a gap is created between the second gasket 19 and the air duct rear cover 103. When the suction force generated by the wind pressure is equal to the elastic force generated by the compression spring 17, the second gasket 19 adheres to the air duct rear cover 103, thereby increasing the wind pressure.

[0033] like Figure 1 , 2 As shown in Figure 3, when the lead screw 12 is rotated out, the elastic force generated by the compression spring 17 decreases accordingly, and the suction force required to balance the wind pressure also decreases, thereby reducing the wind pressure. Since the elastic force generated by the compression spring 17 remains constant under the same compression, stable wind pressure is achieved.

[0034] In the description of this invention, it should be noted that the terms "internal" and "external" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0035] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A wind pressure stabilizing device for a seeder, characterized in that: The system includes a connecting frame, a fan, a tailpipe, a motion conversion mechanism, a first pipe connector, a first air pipe, an air duct, a pressure stabilizer, a rubber pad, a second pipe connector, a square tube, a second air pipe, an R-pin, a lead screw, a third pipe connector, a frustum, a compression spring, a third bolt, a second washer, and a third nut. The connecting frame includes a connecting cylinder, a support frame, and an air duct rear cover. One end of the connecting cylinder is connected to the tailpipe, and the other end is connected to the fan. The support frame connects the connecting cylinder and the air duct rear cover together. The first pipe connector is detachably connected to the connecting cylinder. One end of the motion conversion mechanism is located inside the connecting cylinder, and the other end is located outside the connecting cylinder. The air duct is fitted onto the air duct rear cover and the motion conversion mechanism. The second pipe connector is detachable. The first air pipe is connected to the rear cover of the duct, and its two ends are respectively connected to the first pipe joint and the second pipe joint. The rubber pad fits against the frustum and is connected to the rear cover of the duct through the second washer and the third nut. The compression spring is disposed between the frustum and the lead screw. The pressure stabilizer is disposed on the rubber pad and is connected to the rear cover of the duct through the third bolt. The compression spring and the frustum are disposed inside the pressure stabilizer. The third pipe joint is detachably connected to the pressure stabilizer. One end of the second air pipe is connected to the third pipe joint and the other end is connected to the square tube. One end of the lead screw is disposed inside the pressure stabilizer and the other end is disposed outside the pressure stabilizer. The R-pin is disposed on the lead screw.

2. The wind pressure stabilizing device for a seeder according to claim 1, characterized in that: The motion conversion mechanism includes: a baffle, a first washer, a first bolt, a first nut, a push rod, a second bolt, a second nut, and a duct front cover. The baffle is a disc structure with radially symmetrical cylindrical bosses. One plane of the disc is perpendicular to the cylindrical bosses, and a triangular boss is located near the center. The first washer is fitted onto each of the two cylindrical bosses. The connecting cylinder has two radially arranged slots and a limiting slot. The cylindrical bosses are positioned within the slots, allowing the baffle to rotate only within the connecting cylinder. The push rod passes through the limiting slot and extends into the... Inside the connecting cylinder, the triangular boss has a through hole at the corner away from the baffle. One end of the push rod is set in the through hole of the triangular boss by the first bolt and the first nut. The push rod rotates around the first bolt. The front cover of the air duct has a through hole in the center. The second bolt and the second nut pass through the center hole on the front cover of the air duct and are connected to the push rod. The two ends of the air duct are respectively fitted onto the front cover of the air duct and the rear cover of the air duct. The front cover of the air duct, the air duct, and the rear cover of the air duct form a sealed cavity structure.

3. The wind pressure stabilizing device for a seeder according to claim 2, characterized in that: The forward and backward movement of the air duct drives the movement of the air duct front cover and the push rod, causing the baffle connected to the push rod to rotate in the connecting cylinder.

4. The wind pressure stabilizing device for a seeder according to claim 1, characterized in that: The duct back cover has a boss with four evenly distributed third threaded holes and a central through hole. One end of the truncated cone has a thread, and the other end has a disc near the end face. The threaded end passes through the rubber pad and the through hole on the duct back cover, and is connected by the second washer and the third nut. One end of the lead screw has a pressure plate, and the other end has a thread and a radial through hole. The R-pin is placed in the through hole. The pressure stabilizer has four evenly distributed through holes and a central fourth threaded hole. The end of the lead screw with the pressure plate is placed in the fourth threaded hole, and the threaded end is placed outside the pressure stabilizer. The compression spring is placed inside the pressure stabilizer, and its two ends are respectively sleeved on the truncated cone and the lead screw. The pressure stabilizer is attached to the rubber pad, and the holes of the pressure stabilizer are aligned with the holes on the rubber pad and the duct back cover, and are connected by the third bolt. The pressure stabilizer, the rubber pad, and the duct back cover form a sealed cavity structure.

5. The wind pressure stabilizing device for a seeder according to claim 4, characterized in that: When the device is in operation, when the lead screw is screwed in, the lead screw compresses the compression spring, causing the compression spring to generate elastic force, which pushes the second gasket on the back cover of the air duct to move, so that a gap is created between the second gasket and the back cover of the air duct. When the suction force generated by the air pressure is equal to the elastic force generated by the compression spring, the second gasket adheres to the back cover of the air duct, thereby increasing the air pressure.

6. The wind pressure stabilizing device for a seeder according to claim 4, characterized in that: When the lead screw is turned out, the elastic force generated by the compression spring decreases accordingly, and the suction force required to balance the wind pressure also decreases, thereby reducing the wind pressure. Since the elastic force generated by the compression spring is constant under the same compression, stable wind pressure is achieved.

7. The wind pressure stabilizing device for a seeder according to claim 4, characterized in that: The diameter of the compression spring wire is between 1 and 2.2 mm, and the free length is between 25 and 100 mm.

8. The wind pressure stabilizing device for a seeder according to claim 7, characterized in that: The compression spring has a wire diameter of approximately 1.2 mm and a free length of approximately 40 mm.

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