Linkage adjusting mechanism for small seeding machine using air suction technique

Abstract

The utility model relates to linkage adjusting mechanism suitable for air suction technology small -size seeding machine, including rack, lift seat, two -way screw, slip seat, furrow opener and linkage assembly, the rack is set up perpendicularly in the both sides of frame, every rack is equipped with lift seat, lift seat slides up and down along the rack, be provided with the lift motor of output shaft gear on every lift seat, gear engages with the rack, two lift seats are rotatably provided with two -way screw, at least one lift seat is provided with the drive part for controlling two -way screw rotation between two lift seats, still be provided with slide between two lift seats, still be arranged a plurality of slip seats between two lift seats, the slide and two -way screw all transversely pass every slip seat, be provided with furrow opener on slip seat, the slip seat with two -way screw engages in the end of two -way screw, a plurality of slip seats are hinged with linkage assembly between. The utility model adopts the mechanical mode to automatically adjust the seeding depth and the seeding interval of furrow opener, has saved the tedious operation of manpower.

Description

Technical Field

[0001] This utility model relates to the field of seeder technology, and in particular to a linkage adjustment mechanism suitable for small seeders using air suction technology. Background Technology

[0002] A seeder is an agricultural machine capable of performing a series of operations in one stop, including tilling, ditching, sowing, covering, compaction, and depth adjustment. A previous patent application by the applicant, publication number CN222997018U, describes a small seeder based on air-suction technology. This seeder has four furrow openers with adjustable depths to adjust the sowing depth, and the spacing between the furrow openers is also adjustable to adjust the plant spacing. Adjusting the plant spacing and depth is achieved through mounting sleeves; however, these sleeves are manually operated, requiring the adjustment of four sleeves to adjust the corresponding four furrow openers. This operation is cumbersome and time-consuming. Furthermore, some mounting sleeves are located close to the machine frame, making adjustment less convenient compared to those located at the frame edge. Therefore, this paper proposes a linkage adjustment mechanism suitable for small seeders based on air-suction technology. Summary of the Invention

[0003] To address the problems of manual adjustment of plant spacing and sowing depth in existing seeders, which is time-consuming and labor-intensive, this invention provides a linkage adjustment mechanism suitable for small air-suction seeders. This mechanism enables the synchronous lifting and lowering of the four furrow openers for synchronous adjustment of sowing depth, and also enables the synchronous adjustment of the spacing between the four furrow openers for synchronous adjustment of plant spacing, thus reducing the labor intensity of manual operation.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A linkage adjustment mechanism suitable for small air-suction seeders is installed on the seeder frame. It includes a rack, a lifting seat, a two-way lead screw, a sliding seat, a furrow opener, and a linkage component. The racks are vertically arranged on both sides of the frame, and the lifting seat is sleeved on each rack. The lifting seat slides up and down along the rack. Each of the lifting seats is equipped with a lifting motor with a gear on the output shaft. The gear meshes with a rack and pinion, and the rotation of the gear drives the lifting seat to move up and down. A bidirectional lead screw is rotatably arranged between the two lifting seats. At least one lifting seat is equipped with a drive component for controlling the rotation of the bidirectional lead screw. A slide rod is also arranged between the two lifting seats. Between the two lifting seats, there are also a number of sliding seats arranged in a straight line. The sliding rod and the double-acting screw both pass through each sliding seat laterally. Each sliding seat is equipped with the groove opener. The sliding seat located at the end of the double-acting screw meshes with the double-acting screw, which facilitates the horizontal movement of the sliding seat. The linkage assembly is hinged between the multiple sliding seats to facilitate the synchronous control of the sliding seats. The linkage assembly includes multiple sets of mutually hinged linkage groups.

[0005] Further, the lifting seat comprises two lifting plates and support sleeves. The number of the lifting plates is two, the cross section of each lifting plate is in a convex shape, a plurality of the support sleeves are arranged between the two lifting plates to facilitate connecting the two lifting plates. The support sleeve is a hexagonal copper column structure, and a bolt is arranged between each lifting plate and the end of each support sleeve for connection.

[0006] Further, the rack is vertically arranged between the two lifting plates in a penetrating manner, and both the upper and lower ends of the rack are connected and fixed to the frame; the lifting motor is arranged on one lifting plate, and the gear is arranged between the two lifting plates.

[0007] Further, the spiral directions of the two ends of the bidirectional lead screw are opposite, and the end of the bidirectional lead screw is rotatably connected with the lifting seat through a bearing seat; the driving member is connected and fixed to the end of the bidirectional lead screw, and the driving member is a hand wheel or a driving motor, which is convenient for realizing manual or electric operation of the bidirectional lead screw.

[0008] Further, the number of the slide rods is two, the two slide rods are arranged in parallel up and down, the bidirectional lead screw is arranged between the two slide rods, and the ends of the slide rods are connected and fixed to the lifting seat.

[0009] Further, the number of the sliding seats is four, the sliding seat is a plate body bent into a "U" shape, the slide rods are arranged through both the upper and lower ends of the sliding seat, and the bidirectional lead screw is arranged through the middle part of the sliding seat; The four sliding seats are grouped into two pairs, one group of sliding seats is located at one end of the bidirectional lead screw, the other group of sliding seats is located at the other end of the bidirectional lead screw, and one sliding seat in each group is engaged with the bidirectional lead screw.

[0010] Further, each sliding seat is provided with a hinge plate, which is convenient for providing an installation base for the connecting rod group. The connecting rod group comprises an end connecting rod group and a middle connecting rod group, the end connecting rod group comprises two end connecting rods hinged together in a ">" shape, and the middle connecting rod group comprises two middle connecting rods hinged together in an "X" shape; Among the plurality of sliding seats arranged in a straight line, the hinge plates of the two sliding seats at both ends are provided with the end connecting rod groups, the hinge plates of the remaining sliding seats are provided with the middle connecting rod groups, the middle connecting rod group and the end connecting rod group are hinged, and two adjacent middle connecting rod groups are hinged.

[0011] Further, the furrow opener comprises a hard seeding pipe and a furrow opener body, the hard seeding pipe is detachably connected with the sliding seat, the lower end of the hard seeding pipe is adjustably provided with the furrow opener body, the front part of the lower end of the furrow opener body protrudes forward, and the rear part of the lower end is provided with a soil covering plate.

[0012] Through the above technical solution, the beneficial effects of the utility model are as follows: This utility model features a rationally designed structure. A bidirectional lead screw connects the two lifting seats, driven by a motor. The two lifting seats are also connected and fixed by a sliding rod. Simultaneously, four sliding seats are arranged between the two lifting seats, each slidably connected to the sliding rod. Two of these sliding seats engage with the bidirectional lead screw, and the four sliding seats are connected by a linkage assembly, facilitating coordinated control between them. The four sliding seats can move closer or further apart synchronously. Since each sliding seat is equipped with a furrow opener, flexible adjustment of the sowing spacing is easily achieved.

[0013] This invention, with the assistance of a gear and rack structure, enables the lifting seat to move up and down, thereby driving the furrow opener to move up and down and adjust the sowing depth. The gear and rack structure consists of a rack fixedly mounted on the frame and a geared motor mounted on the lifting seat. The motor's operation causes the entire lifting seat to move up and down along the rack. Compared to existing manual structures that require multiple adjustments to sowing depth and spacing, this invention achieves both mechanized automatic adjustment and synchronous adjustment through electric power, saving manual labor and demonstrating significant application value. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the installation of the linkage adjustment mechanism of the present invention applicable to small air-suction seeders.

[0015] Figure 2 This is one of the isometric views of the linkage adjustment mechanism of the small air-suction seeder of this utility model.

[0016] Figure 3 This is the second isometric drawing of the linkage adjustment mechanism of the present invention applicable to small air-suction seeders.

[0017] Figure 4 This is a schematic diagram of the lifting seat of the linkage adjustment mechanism applicable to small air-suction seeders of this utility model.

[0018] Figure 5 This is a schematic diagram of the linkage adjustment mechanism of the present invention applicable to small air-suction seeders.

[0019] Figure 6 This is a schematic diagram showing the disassembled furrow opener of the linkage adjustment mechanism of a small air-suction seeder, which is applicable to this utility model.

[0020] Figure 7 This is a schematic diagram of the guide rail assembly of the linkage adjustment mechanism applicable to small air-suction seeders of this utility model.

[0021] The reference numerals in the accompanying drawings are: 1 frame, 2 rack, 3 lifting seat, 31 lifting plate, 32 support sleeve, 4 bidirectional lead screw, 5 sliding seat, 6 furrow opener, 61 hard seeding pipe, 62 furrow opener body, 7 linkage assembly, 8 lifting motor, 81 gear, 9 driving member, 10 sliding rod, 11 lead screw nut seat, 12 end connecting rod set, 13 middle connecting rod set, 14 hinge plate, 15 mounting plate, 16 reinforcing plate, 17 nut, 18 screw rod, 19 vertical groove, 20 transverse plate, 21 linear bearing, 22 lifting guide rail, 23 compression spring, 24 soil covering plate. Detailed Description of the Embodiments

[0022] The specific embodiments of the present utility model are described in detail below with reference to the accompanying drawings: As shown in Figures 1-7 , the linkage adjusting mechanism suitable for small-sized pneumatic seeding machines is mounted on the seeding machine frame 1. The seeding machine adopts existing patented technology, and this part is an optimized design for part of the structure of the small-sized seeding machine based on the pneumatic suction technology. By mounting the optimized linkage adjusting mechanism on the seeding machine frame 1 to replace the original part of the structure, the seeding depth and plant spacing can be adjusted conveniently and quickly.

[0023] The linkage adjusting mechanism comprises a rack 2, a lifting seat 3, a bidirectional lead screw 4, a sliding seat 5, a furrow opener 6 and a linkage assembly 7. The racks 2 are vertically arranged on both sides of the frame 1, so the number of the racks 2 is two, and the upper and lower ends of each rack 2 are connected and fixed to the frame 1.

[0024] Each rack 2 is sleeved with a lifting seat 3, which means the rack 2 is arranged to pass through the interior of the lifting seat 3. Specifically, the lifting seat 3 comprises two lifting plates 31 and support sleeves 32. The cross section of each lifting plate 31 is in a "convex" shape, a plurality of support sleeves 32 are arranged between the two lifting plates 31, the support sleeve 32 is a hexagonal copper column structure, and bolts are arranged between each lifting plate 31 and the end of each support sleeve 32 for connection, so that the two lifting plates 31 are connected and fixed together, and a gap exists between the two lifting plates 31 at this time. The rack 2 is vertically arranged to pass through between the two lifting plates 31.

[0025] The lifting seat 3 slides up and down along the rack 2, but the lifting seat 3 does not directly contact the rack 2. To realize the sliding of the lifting seat 3, a lifting motor 8 with a gear 81 on its output shaft is fixedly arranged on each lifting seat 3. The lifting motor 8 adopts a brake-type stepping motor, which can maintain a locked state after power off. When the lifting motor 8 is installed, the lifting motor 8 is arranged on one lifting plate 31, and the gear 81 is arranged between the two lifting plates 31. The lifting motor 8 can drive the gear 81 to rotate, and the gear 81 meshes with the rack 2, so that on the basis of the fixed rack 2, the rotation of the gear 81 can drive the lifting seat 3 to move up and down.

[0026] A bidirectional lead screw 4 is rotatably mounted between two lifting seats 3. The helical directions at both ends of the bidirectional lead screw 4 are opposite. During installation, the ends of the bidirectional lead screw 4 are rotatably connected to the lifting seats 3 via bearing seats. To drive the bidirectional lead screw 4, at least one lifting seat 3 is provided with a drive component 9 for controlling the rotation of the bidirectional lead screw 4. Here, the drive component 9 is fixedly connected to the end of the bidirectional lead screw 4. The drive component 9 can be a handwheel or a drive motor. When the drive component 9 is a handwheel, handwheels are arranged at both ends of the bidirectional lead screw 4. When the drive component 9 is a drive motor, a drive motor is arranged only at one end of the bidirectional lead screw 4. Preferably, the drive component 9 is a drive motor, and the output shaft of the drive motor is fixedly connected to the bidirectional lead screw 4.

[0027] A sliding rod 10 is also provided between the two lifting seats 3. There are two sliding rods 10, which are arranged parallel to each other vertically. A two-way lead screw 4 is arranged between the two sliding rods 10, and the ends of the sliding rods 10 are connected and fixed to the lifting seats 3. The two sliding rods 10 and the two-way lead screw 4 can connect the two lifting seats 3, so as to realize the synchronous up and down movement of the two lifting seats 3.

[0028] Between the two lifting seats 3, there are also four sliding seats 5 arranged in a straight line. Each sliding seat 5 is a plate bent into a "U" shape. The sliding rod 10 and the double-acting screw 4 both pass through each sliding seat 5 laterally. Specifically, the sliding rod 10 is installed at both the top and bottom ends of the sliding seat 5, and the sliding seat 5 is slidably connected to the sliding rod 10. The double-acting screw 4 is installed in the middle of the sliding seat 5.

[0029] The operation of the double-acting screw 4 can drive the sliding seat 5 to move horizontally. However, it should be noted that the sliding seat 5 located at the end of the double-acting screw 4 is engaged with the double-acting screw 4. That is, the four sliding seats 5 are in pairs. One group of sliding seats 5 is located at one end of the double-acting screw 4, and the other group of sliding seats 5 is located at the other end of the double-acting screw 4. One sliding seat 5 in each group is engaged with the double-acting screw 4.

[0030] In short, among the four sequentially arranged sliding seats 5, only the first and fourth sliding seats 5 are equipped with lead screw nut seats 11, which enable the sliding seats 5 to mesh with the double-acting lead screw 4. Furthermore, one end of the double-acting lead screw 4 meshes with a sliding seat 5, and the other end of the double-acting lead screw 4 also meshes with a sliding seat 5. When the double-acting lead screw 4 rotates, it can drive these two sliding seats 5 to move.

[0031] To enable the movement of the remaining two sliding seats 5, a linkage assembly 7 is hinged between the multiple sliding seats 5. The linkage assembly 7 includes multiple sets of interconnected connecting rods. The linkage assembly 7 connects the two sliding seats 5 that mesh with the bidirectional lead screw 4 and the two sliding seats 5 that do not mesh with the bidirectional lead screw 4. Thus, when the two sliding seats 5 at the ends move, the two middle sliding seats 5 can be moved together.

[0032] In this embodiment, the linkage assembly includes an end linkage assembly 12 and a middle linkage assembly 13. The end linkage assembly 12 includes two end linkages hinged together in a ">" shape, and the middle linkage assembly 13 includes two middle linkages hinged together in an "X" shape. When the linkage assembly is installed with the sliding seat 5, each sliding seat 5 is provided with a hinge plate 14.

[0033] Of the four sliding seats 5 arranged in a straight line, the two sliding seats at both ends have end connecting rod groups 12 on their hinge plates 14, which are the sliding seats 5 that mesh with the bidirectional lead screw 4. The other two sliding seats have middle connecting rod groups 13 on their hinge plates 14, which are the sliding seats 5 that do not mesh with the bidirectional lead screw 4. The middle connecting rod groups 13 and the end connecting rod groups 12 are hinged together, and adjacent middle connecting rod groups 13 are also hinged together. Thus, with the cooperation of the entire linkage group, the four sliding seats 5 can be connected together to achieve the linkage control of the four sliding seats 5, and the four sliding seats 5 can move closer or further apart synchronously.

[0034] Each sliding seat 5 is equipped with a furrow opener 6, which can drive the furrow opener 6 to move. The furrow opener 6 includes a seeding tube 61 and a furrow opener body 62. The seeding tube 61 can be made of steel pipe and is detachably connected to the sliding seat 5. Specifically, the upper part of the seeding tube 61 is provided with two mounting plates 15, which are bolted to the sliding seat 5. Triangular reinforcing plates 16 are provided on both sides of the mounting plates 15, which are connected to the seeding tube 61 to improve the connection strength between the mounting plates 15 and the seeding tube 61.

[0035] A furrow opener body 62 is adjustablely mounted at the lower end of the seeding tube 61, allowing it to move up and down along the tube. The furrow opener body 62 has a U-shaped cross-section and fits snugly onto the seeding tube 61. Two screws 18 with nuts 17 are located at the lower end of the seeding tube 61. Vertical grooves 19 are formed on the furrow opener body 62, with the screws 18 arranged vertically within these grooves. Tightening the nuts 17 clamps the vertical grooves 19, securing the furrow opener body 62. Loosening the nuts 17 allows the furrow opener body 62 to be adjusted vertically. A soil-covering plate 24 protrudes forward from the lower front end and is located at the lower rear end of the furrow opener body 62.

[0036] The principle of this utility model is as follows: Based on the existing patented technology - a small seeder based on air suction technology, this linkage adjustment mechanism is installed on the frame 1, and the seeding hard tube 61 is connected to the seeding soft tube in the existing patented technology. At the same time, the drive component 9 and the lifting motor 8 are connected to the battery pack in the existing patented technology to provide power supply for the operation of the mechanism.

[0037] When the sowing depth needs adjustment, the two lifting motors 8 operate simultaneously, driving the two lifting seats 3 and the four furrow openers 6 to move downwards at the same time, causing the furrow openers 6 to penetrate deeper into the ground and increase the sowing depth. When the sowing spacing needs adjustment, the drive unit 9 is activated, using the drive motor to drive the bidirectional lead screw 4, and under the action of the linkage component 7, the four furrow openers 6 move closer or further apart synchronously, thereby decreasing or increasing the sowing spacing. The entire adjustment of sowing depth and spacing is completely mechanically controlled, achieving precise sowing and saving time and effort in sowing operation adjustments.

[0038] To optimize the product structure and improve the stability of the lifting seat 3's vertical movement, guide rail assemblies are installed on both sides of the frame 1, with each guide rail assembly corresponding to a lifting seat 3. The guide rail assembly includes a horizontal plate 20, a linear bearing 21, and a lifting guide rail 22. The horizontal plate 20 is mounted on the lifting seat 3, and the linear bearing 21 is installed on the horizontal plate 20. The lifting guide rail 22 is fixedly installed on the frame 1, and its height is the same as the rack 2. The linear bearing 21 slides along the lifting guide rail 22. Furthermore, a compression spring 23 is installed outside the lifting guide rail 22 between the frame 1 and the horizontal plate 20 to support the lifting seat 3 upwards.

[0039] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A linkage adjustment mechanism suitable for small air-suction seeders, installed on the seeder frame (1), characterized in that, comprising a rack (2), a lifting seat (3), a bidirectional lead screw (4), sliding seats (5), furrow openers (6) and a linkage assembly (7); the racks (2) are vertically arranged on both sides of the frame (1), each rack (2) is sleeved with the lifting seat (3), and the lifting seat (3) slides up and down along the rack (2); Each lifting seat (3) is provided with a lifting motor (8) whose output shaft is equipped with a gear (81), and the gear (81) meshes with the rack (2); the bidirectional lead screw (4) is rotatably arranged between the two lifting seats (3), at least one lifting seat (3) is provided with a driving member (9) for controlling the rotation of the bidirectional lead screw (4), and a sliding rod (10) is further arranged between the two lifting seats (3); A plurality of the sliding seats (5) arranged in a straight line are further disposed between the two lifting seats (3); the sliding rod (10) and the bidirectional lead screw (4) both transversely pass through each sliding seat (5), and each sliding seat (5) is provided with the furrow opener (6); the sliding seat (5) located at the end of the bidirectional lead screw (4) meshes with the bidirectional lead screw (4), the linkage assembly (7) is hinged between the plurality of sliding seats (5), and the linkage assembly (7) comprises a plurality of groups of mutually hinged connecting rod sets.

2. The linkage adjustment mechanism for a small air-suction seeder according to claim 1, characterized in that, The lifting seat (3) comprises two lifting plates (31) and supporting sleeves (32); the cross section of each lifting plate (31) is in a "convex" shape, a plurality of the supporting sleeves (32) are arranged between the two lifting plates (31), the supporting sleeve (32) is a hexagonal copper column structure, and bolts are arranged between each lifting plate (31) and the end of each supporting sleeve (32) for connection.

3. The linkage adjustment mechanism for a small air-suction seeder according to claim 2, characterized in that, The rack (2) is vertically arranged to pass through between the two lifting plates (31), and both upper and lower ends of the rack (2) are connected and fixed to the frame (1); the lifting motor (8) is arranged on one lifting plate (31), and the gear (81) is disposed between the two lifting plates (31).

4. The linkage adjustment mechanism for a small air-suction seeder according to claim 1, characterized in that, The spiral directions of the two ends of the bidirectional lead screw (4) are opposite, and the ends of the bidirectional lead screw (4) are rotatably connected with the lifting seats (3) through bearing seats; the driving member (9) is connected and fixed to the end of the bidirectional lead screw (4), and the driving member (9) is a handwheel or a driving motor.

5. The linkage adjustment mechanism for a small air-suction seeder according to claim 1, characterized in that, The number of the sliding rods (10) is two, the two sliding rods (10) are arranged in parallel up and down, the bidirectional lead screw (4) is disposed between the two sliding rods (10), and the ends of the sliding rods (10) are connected and fixed to the lifting seats (3).

6. The linkage adjustment mechanism for a small air-suction seeder according to claim 5, characterized in that, The number of the sliding seats (5) is four; the sliding seat (5) is a plate body bent into a "U" shape, the sliding rods (10) pass through both the upper and lower ends of the sliding seat (5), and the bidirectional lead screw (4) passes through the middle part of the sliding seat (5); The four sliding seats (5) are grouped into two pairs, one pair of sliding seats (5) is located at one end of the bidirectional lead screw (4), the other pair of sliding seats (5) is located at the other end of the bidirectional lead screw (4), and one sliding seat (5) in each group meshes with the bidirectional lead screw (4).

7. The linkage adjustment mechanism for a small air-suction seeder according to claim 1, characterized in that, Each sliding seat (5) is provided with a hinge plate (14). The linkage group includes an end linkage group (12) and a middle linkage group (13). The end linkage group (12) includes two end linkages hinged together in a ">" shape. The middle linkage group (13) includes two middle linkages hinged together in an "×" shape. Among the multiple sliding seats (5) arranged in a straight line, the end connecting rod group (12) is provided on the hinge plate (14) of the two sliding seats (5) located at both ends, and the middle connecting rod group (13) is provided on the hinge plate (14) of the remaining sliding seats (5). The middle connecting rod group (13) and the end connecting rod group (12) are hinged together, and two adjacent middle connecting rod groups (13) are hinged together.

8. The linkage adjustment mechanism for a small air-suction seeder according to claim 1, characterized in that, The furrow opener (6) includes a seeding tube (61) and a furrow opener body (62). The seeding tube (61) is detachably connected to the sliding seat (5). The furrow opener body (62) is adjustablely installed at the lower end of the seeding tube (61). The furrow opener body (62) protrudes forward at the front of the lower end and is covered with a soil covering plate (24) at the rear of the lower end.

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