A drive mechanism for driving the operation of a rotary seed metering mechanism

Abstract

The application discloses a driving mechanism for driving the operation of a rotary seed sowing mechanism, which comprises a base table, a driving motor and an eccentric mechanism; the eccentric mechanism comprises a first connecting block and a second connecting block, the first connecting block and the second connecting block are respectively rotationally connected with the base table and a seat body, two groups of rotationally connected rotating shafts are sequentially a first shaft and a second shaft; the driving motor is drivingly connected with the first connecting block; a counterweight block is further connected on the second connecting block, the counterweight block can slide to adjust the position relative to the second connecting block, and a plurality of ball mechanisms are installed on the lower end surface of the counterweight block; the ball mechanisms can roll on the upper end surface of the base table. The counterweight block can effectively balance the great centrifugal force generated when the seed sowing mechanism rotates, so as to prevent the base table from generating great shaking and affecting the operation of the machine tool and improve the stability of the operation of the machine tool. The ball mechanisms can support the lower side of the counterweight block and effectively reduce the running resistance of the counterweight block.

Description

Technical Field

[0001] This invention relates to the field of drive mechanism technology for agricultural machinery, and in particular to a drive mechanism for driving a rotary seed metering mechanism. Background Technology

[0002] As a core component of agricultural machinery, the seed metering device's efficiency and precision directly affect sowing quality and crop yield. Rotary seed metering devices, which drive the seed box in a circular motion to promote orderly seed filling, are widely used in precision sowing. For example, the adjustable-radius seed box drive mechanism disclosed in patent CN112514614A uses a sliding groove structure to adjust the circular radius of the seed box to adapt to different seed characteristics. However, during high-speed operation, the enormous centrifugal force generated by the seed box and related components can easily cause strong vibrations on the base platform, leading to machine instability. Especially when the seed box load is large or the motion amplitude is adjusted, traditional structures lack an effective dynamic balancing mechanism and cannot counteract the rotational inertial force, affecting not only the uniformity of seed metering but also shortening the service life of key components. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the prior art, the present invention provides a drive mechanism for driving the rotary seeding mechanism to operate, which can improve the structural stability and avoid large vibrations of the machine.

[0004] Technical Solution: To achieve the above objectives, the present invention provides a driving mechanism for driving the rotary seeding mechanism, comprising a base platform, a drive motor, and an eccentric mechanism for establishing a transmission relationship between the drive motor and the base of the seeding mechanism; the eccentric mechanism includes a first connecting block and a second connecting block, which are rotatably connected to the base platform and the base, respectively, and the two sets of rotatably connected shafts are, in sequence, a first shaft and a second shaft; the drive motor is drivenly connected to the first connecting block.

[0005] A counterweight is also connected to the second connecting block. The counterweight can slide and adjust its position relative to the second connecting block, and multiple ball bearing mechanisms are installed on the lower end face of the counterweight. The ball bearing mechanisms can roll on the upper end face of the base platform. The first connecting block, the second connecting block, and the counterweight are all placed between the seat and the base platform. The counterweight and the second shaft are placed on opposite sides of the first shaft. The distance between the center of gravity of the counterweight and the first shaft is a first distance, and the distance between the second shaft and the first shaft is a second distance. The first distance is at least one order of magnitude larger than the second distance.

[0006] Furthermore, the counterweight has a first groove, and the second connecting block has a portion that is embedded in the first groove; the second connecting block has multiple adjustment holes, and a first screw passing through the adjustment holes fixes the second connecting block relative to the counterweight. By passing the first screw through different adjustment holes, the distance between the counterweight and the first shaft can be adjusted.

[0007] Furthermore, the counterweight is fan-shaped, with the side furthest from the first axis being arc-shaped; the first slide groove is centrally located relative to the counterweight, and the two sets of ball bearing mechanisms are symmetrically arranged on both sides of the first slide groove.

[0008] Furthermore, the relative position between the first connecting block and the second connecting block can be adjusted to change the rotation radius of the seat.

[0009] Furthermore, the first connecting block has a wide groove and a narrow groove; the second connecting block has a wide body and a narrow body disposed in the wide groove and the narrow groove respectively, and a transition shoulder is provided between the wide body and the narrow body; the first connecting block has an adjusting screw acting on the transition shoulder and a second screw for fixing the second connecting block.

[0010] With the above structure, after loosening the second screw, by rotating the adjusting screw and keeping the transition shoulder of the second connecting block in contact with the end of the second screw, the position of the second connecting block can be precisely adjusted, thereby achieving precise adjustment of the rotation radius.

[0011] Furthermore, a first rotating shaft and a second rotating shaft are respectively installed on the first connecting block and the second connecting block; the first rotating shaft is connected to the base platform through a first bearing seat; the second rotating shaft is connected to the base body through a second bearing seat.

[0012] Furthermore, a motor mounting plate is installed below the base platform, and the motor mounting plate is fixedly installed relative to the base platform via multiple connecting columns; the motor mount of the drive motor is installed below the motor mounting plate, and a synchronous belt assembly connecting the motor shaft of the drive motor and the first rotating shaft is provided between the motor mounting plate and the base platform.

[0013] Furthermore, two horizontal slide rails and two vertical slide rails are provided between the seat and the base platform; the horizontal slide rails are fixed to the base platform, and the vertical slide rails are mounted on a transition plate. Each end of the transition plate is equipped with a first slider that slides with the two horizontal slide rails respectively; a second slider that engages with the vertical slide rails is mounted on the seat. This ensures the stability of the relative rotation between the seat and the base platform.

[0014] Beneficial effects: The drive mechanism of the present invention for driving the rotary seeding mechanism has the following characteristics:

[0015] Beneficial effects:

[0016] (1) The counterweight can effectively balance the large centrifugal force generated when the seeding mechanism rotates, so as to prevent the base platform from shaking significantly and affecting the operation of the machine, thus improving the stability of the machine operation. The ball bearing mechanism can provide support for the lower side of the counterweight and effectively reduce the running resistance of the counterweight.

[0017] (2) Since the rotation radius of the rotating mechanism is very small (generally 1-3cm), by increasing the multiple difference between the second distance and the first distance, a smaller counterweight can be set to balance the centrifugal force generated by the heavy seed metering mechanism. By adjusting the position of the counterweight, the balancing force can be scaled to adapt to the centrifugal force generated by the seed metering mechanism.

[0018] (3) By setting the shape of the counterweight and reasonably setting the adjustment mechanism and ball mechanism, the space occupied by the counterweight during rotation can be minimized, and the overall force and support force of the counterweight can be balanced, so as to avoid the counterweight itself from shaking and affecting the stability of the machine.

[0019] (4) The relative position between the first connecting block and the second connecting block can be adjusted to change the rotation radius of the seat, and the rotation effect can be finely adjusted. Attached Figure Description

[0020] Figure 1 A side view of the drive mechanism that drives the rotary seeding mechanism.

[0021] Figure 2 A front view of the drive mechanism that drives the rotary seeding mechanism.

[0022] Figure 3 A top view of the drive mechanism that drives the rotary seeding mechanism.

[0023] Figure 4 A first-view structural diagram of a portion of the drive mechanism;

[0024] Figure 5 A second-view structural diagram of a portion of the drive mechanism;

[0025] Figure 6 This is a structural diagram of the drive mechanism and the seeding mechanism.

[0026] In the diagram: 1-Drive motor; 2-Base; 3-First connecting block; 31-Wide groove; 32-Narrow groove; 4-Second connecting block; 41-Adjusting hole; 42-Wide body; 43-Narrow body; 5-Base platform; 6-Counterweight block; 61-First slide groove; 7-Ball bearing mechanism; 8-Adjusting screw; 9-Second screw; 10-First rotating shaft; 11-Second rotating shaft; 12-First bearing seat; 13-Second bearing seat; 14-Motor mounting plate; 15-Connecting column; 16-Synchronous belt assembly; 17-Horizontal slide rail; 18-Longitudinal slide rail; 19-Transition plate; A-Seedling mechanism. Detailed Implementation

[0027] The invention will now be further described with reference to the accompanying drawings.

[0028] like Figures 1 to 3 The drive mechanism shown is for driving the rotary seeding mechanism, and includes a base platform 5, a drive motor 1, and a mechanism for connecting the drive motor 1 with the seeding mechanism A (e.g., ...). Figure 6 The eccentric mechanism for the transmission relationship between the base 2 and the seat body 2 (shown) includes a first connecting block 3 and a second connecting block 4, which are rotatably connected to the base platform 5 and the seat body 2 respectively. The two sets of rotatably connected shafts are the first shaft and the second shaft in sequence. The drive motor 1 is drivenly connected to the first connecting block 3.

[0029] The second connecting block 4 is also connected to a counterweight 6, which can slide and adjust its position relative to the second connecting block 4. Multiple ball bearing mechanisms 7 are installed on the lower end face of the counterweight 6; these ball bearing mechanisms 7 can roll on the upper end face of the base platform 5. The first connecting block 3, the second connecting block 4, and the counterweight 6 are all positioned between the seat 2 and the base platform 5. The counterweight 6 and the second shaft are positioned on opposite sides of the first shaft. The distance between the center of gravity of the counterweight 6 and the first shaft is a first distance, and the distance between the second shaft and the first shaft is a second distance. The first distance is at least an order of magnitude larger than the second distance.

[0030] With the above structure, the counterweight 6 can effectively balance the large centrifugal force generated when the seeding mechanism A rotates, preventing the base platform 5 from shaking significantly and affecting the machine's operation, thus improving the stability of the machine's operation. The ball bearing mechanism 7 provides support to the lower side of the counterweight 6 and effectively reduces the running resistance of the counterweight 6.

[0031] Since the rotation radius of the rotating mechanism is very small (generally 1-3cm), by increasing the multiple difference between the second distance and the first distance, a smaller counterweight 6 can be used to balance the centrifugal force generated by the heavy seed metering mechanism A. By adjusting the position of the counterweight 6, the balancing force can be scaled to adapt to the centrifugal force generated by the seed metering mechanism A.

[0032] Preferably, such as Figure 4 As shown, the counterweight 6 has a first groove 61, and the second connecting block 4 has a portion that is embedded in the first groove 61; the second connecting block 4 has a plurality of adjusting holes 41 formed thereon, and a first screw passing through the adjusting holes 41 fixes the second connecting block 4 relative to the counterweight 6. By passing the first screw through different adjusting holes 41, the distance between the counterweight 6 and the first shaft can be adjusted.

[0033] The counterweight 6 is fan-shaped, with the side furthest from the first axis being arc-shaped; the first slide groove 61 is centrally located relative to the counterweight 6, and the two sets of ball bearing mechanisms 7 are symmetrically arranged on both sides of the first slide groove 61.

[0034] In this way, by setting the shape of the counterweight 6 and reasonably setting the adjustment mechanism and the ball bearing mechanism 7, the space occupied by the counterweight 6 when rotating can be minimized, and the overall force and support force of the counterweight 6 can be balanced, so as to avoid the counterweight 6 itself from shaking and affecting the stability of the machine.

[0035] The relative position between the first connecting block 3 and the second connecting block 4 can be adjusted to change the rotation radius of the seat 2.

[0036] Specifically, such as Figure 5 As shown, the first connecting block 3 has a wide groove 31 and a narrow groove 32; the second connecting block 4 has a wide body 42 and a narrow body 43 respectively disposed in the wide groove 31 and the narrow groove 32, and a transition shoulder is provided between the wide body 42 and the narrow body 43; the first connecting block 3 has an adjusting screw 8 acting on the transition shoulder and a second screw 9 for fixing the second connecting block 4.

[0037] With the above structure, after loosening the second screw 9, by rotating the adjusting screw 8 and keeping the transition shoulder of the second connecting block 4 in contact with the end of the second screw 9, the position of the second connecting block 4 can be precisely adjusted, thereby achieving precise adjustment of the rotation radius.

[0038] Preferably, a first rotating shaft 10 and a second rotating shaft 11 are respectively installed on the first connecting block 3 and the second connecting block 4; the first rotating shaft 10 is connected to the base platform 5 through a first bearing seat 12; and the second rotating shaft 11 is connected to the base body 2 through a second bearing seat 13.

[0039] Preferably, a motor mounting plate 14 is installed below the base platform 5, and the motor mounting plate 14 is fixedly installed relative to the base platform 5 by a plurality of connecting columns 15; the motor seat of the drive motor 1 is installed below the motor mounting plate 14, and a synchronous belt assembly 16 connecting the motor shaft of the drive motor 1 and the first rotating shaft 10 is provided between the motor mounting plate 14 and the base platform 5.

[0040] Preferably, two horizontal slide rails 17 and two vertical slide rails 18 are further provided between the seat body 2 and the base platform 5; the horizontal slide rails 17 are fixed on the base platform 5, and the vertical slide rails 18 are mounted on a transition plate 19. Each end of the transition plate 19 is equipped with a first slider that slides in cooperation with the two horizontal slide rails 17 respectively; a second slider that cooperates with the vertical slide rails 18 is mounted on the seat body 2. This ensures the stability of the relative rotation between the seat body 2 and the base platform 5.

[0041] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A driving mechanism for driving a rotary seeding mechanism, comprising a base platform (5), a drive motor (1), and an eccentric mechanism for establishing a transmission relationship between the drive motor (1) and the base (2) of the seeding mechanism (A); the eccentric mechanism comprises a first connecting block (3) and a second connecting block (4), the first connecting block (3) and the second connecting block (4) being rotatably connected to the base platform (5) and the base (2) respectively, and the two sets of rotatably connected shafts being the first shaft and the second shaft respectively; the drive motor (1) is drivenly connected to the first connecting block (3); characterized in that: The second connecting block (4) is also connected to a counterweight (6), which can slide and adjust its position relative to the second connecting block (4), and a plurality of ball bearing mechanisms (7) are installed on the lower end face of the counterweight (6); the ball bearing mechanism (7) can roll on the upper end face of the base platform (5); The first connecting block (3), the second connecting block (4), and the counterweight (6) are all placed between the seat (2) and the base platform (5); the counterweight (6) and the second shaft are placed on both sides of the first shaft, the distance between the center of gravity of the counterweight (6) and the first shaft is the first distance, the distance between the second shaft and the first shaft is the second distance, and the first distance is at least one order of magnitude larger than the second distance; The relative position between the first connecting block (3) and the second connecting block (4) can be adjusted to change the rotation radius of the seat (2); The first connecting block (3) has a wide groove (31) and a narrow groove (32); the second connecting block (4) has a wide body (42) and a narrow body (43) respectively placed in the wide groove (31) and the narrow groove (32), and there is a transition shoulder between the wide body (42) and the narrow body (43); the first connecting block (3) has an adjusting screw (8) acting on the transition shoulder and a second screw (9) for fixing the second connecting block (4).

2. The driving mechanism for driving the rotary seeding mechanism according to claim 1, characterized in that, The counterweight (6) has a first groove (61) and the second connecting block (4) has a portion that is embedded in the first groove (61); the second connecting block (4) has a plurality of adjustment holes (41) formed thereon, and a first screw passing through the adjustment hole (41) fixes the second connecting block (4) relative to the counterweight (6).

3. The driving mechanism for driving the rotary seeding mechanism according to claim 2, characterized in that, The counterweight (6) is fan-shaped, with the side away from the first axis being arc-shaped; the first slide groove (61) is centrally located relative to the counterweight (6), and the two sets of ball bearing mechanisms (7) are symmetrically arranged on both sides of the first slide groove (61).

4. The driving mechanism for driving the rotary seeding mechanism according to claim 1, characterized in that, The first connecting block (3) and the second connecting block (4) are respectively equipped with a first rotating shaft (10) and a second rotating shaft (11); the first rotating shaft (10) is connected to the base platform (5) through a first bearing seat (12); the second rotating shaft (11) is connected to the seat body (2) through a second bearing seat (13).

5. The driving mechanism for driving the rotary seeding mechanism according to claim 4, characterized in that, A motor mounting plate (14) is installed below the base platform (5). The motor mounting plate (14) is fixedly installed relative to the base platform (5) by a plurality of connecting columns (15). The motor seat of the drive motor (1) is installed below the motor mounting plate (14). A synchronous belt assembly (16) connecting the motor shaft of the drive motor (1) and the first rotating shaft (10) is provided between the motor mounting plate (14) and the base platform (5).

6. The driving mechanism for driving the rotary seeding mechanism according to claim 1, characterized in that, Two horizontal slide rails (17) and two vertical slide rails (18) are provided between the seat (2) and the base platform (5); the horizontal slide rails (17) are fixed on the base platform (5), and the vertical slide rails (18) are installed on the transition plate (19). Both ends of the transition plate (19) are equipped with first sliders that slide and cooperate with the two horizontal slide rails (17) respectively; the seat (2) is equipped with second sliders that cooperate with the vertical slide rails (18).

Images