Driving mechanism for driving rotary seed metering mechanism to operate

Abstract

The invention discloses a driving mechanism for driving a rotary seed metering mechanism to operate. The driving mechanism comprises a base table board, 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 rotationally connected with the base table top and the base body respectively, and the two sets of rotating shafts which are rotationally connected are a first shaft and a second shaft in sequence; the driving motor is in driving connection with the first connecting block; the second connecting block is further connected with a balancing weight, the balancing weight can slide relative to the second connecting block to adjust the position, and a plurality of ball mechanisms are installed on the lower end face of the balancing weight. The ball mechanism can roll on the upper end face of the base table top. The balancing weight can effectively balance the large centrifugal force generated when the seed metering mechanism rotates, so that the situation that the table top of the base shakes greatly to affect the operation of the machine tool is prevented, and the operation stability of the machine tool is improved. The lower side of the balancing weight can be supported by the ball mechanism, and the running resistance of the balancing weight is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of driving mechanisms for agricultural machinery, and particularly to a driving mechanism for driving a rotary seed metering mechanism to operate. Background Art

[0002] As a core component of agricultural machinery, the operation efficiency and precision of the seed metering device directly affect the seeding quality and crop yield. The rotary seed metering device promotes the orderly filling of seeds by driving the seed box to perform circular motion, and is widely used in the field of precision seeding. For example, the seed box driving mechanism with adjustable motion amplitude disclosed in the existing patent CN112514614A adjusts the circular motion radius of the seed box through a chute structure to adapt to different seed characteristics. However, when such a mechanism operates at high speed, the huge centrifugal force generated by the seed box and related components is likely to cause strong vibration of the base table surface, resulting in unstable operation of the machine. Especially when the seed box has a large seed load or the motion amplitude is adjusted, the traditional structure lacks an effective dynamic balance mechanism and cannot offset the rotational inertia force, which not only affects the uniformity of seed metering, but also shortens the service life of key components. Summary of the Invention

[0003] Object of the Invention: In order to overcome the deficiencies in the prior art, the present invention provides a driving mechanism for driving a rotary seed metering mechanism to operate, which can improve the operation stability of the structure and avoid large vibrations of the machine.

[0004] Technical Solution: To achieve the above object, the driving mechanism for driving a rotary seed metering mechanism to operate according to the present invention includes a base table surface, a driving motor, and an eccentric mechanism for establishing a transmission relationship between the driving motor and the seat body of the seed metering mechanism; the eccentric mechanism includes a first connecting block and a second connecting block, the first connecting block and the second connecting block are respectively rotatably connected to the base table surface and the seat body, and the rotating shafts of the two sets of rotational connections are the first shaft and the second shaft in sequence; the driving motor is drivingly connected to the first connecting block;

[0005] A counterweight block is further connected to the second connecting block, the counterweight block can slide relative to the second connecting block to adjust its position, 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 surface. The first connecting block, the second connecting block, and the counterweight block are all disposed between the seat body and the base table surface; the counterweight block and the second shaft are respectively located on both sides of the first shaft, the distance between the center of gravity of the counterweight block 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.

[0006] Further, a first sliding groove is provided in the counterweight block, and a part of the second connecting block is embedded in the first sliding groove; a plurality of adjusting holes are formed in the second connecting block, and a first screw passing through the adjusting holes fixes the second connecting block relative to the counterweight block. By passing the first screw through different adjusting holes, the distance between the counterweight block and the first shaft can be adjusted.

[0007] Further, the counterweight block is fan-shaped, and the side thereof away from the first shaft is arc-shaped; the first sliding groove is centered relative to the counterweight block, and two sets of the ball mechanisms are symmetrically arranged on both sides of the first sliding groove.

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

[0009] Further, a wide groove portion and a narrow groove portion are provided in the first connecting block; the second connecting block has a wide body portion and a narrow body portion respectively placed in the wide groove portion and the narrow groove portion, and a transition shoulder is provided between the wide body portion and the narrow body portion; an adjusting screw acting on the transition shoulder and a second screw for fixing the second connecting block are provided on the first 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 always in contact with the end of the second screw, the position of the second connecting block can be accurately adjusted, and the accurate adjustment of the rotation radius can be realized.

[0011] Further, 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 table through a first bearing seat; the second rotating shaft is connected to the seat body through a second bearing seat.

[0012] Further, a motor mounting plate is installed below the base table, and the motor mounting plate is fixedly installed relative to the base table through a plurality of connecting columns; the motor seat of the driving motor is installed below the motor mounting plate, and a synchronous belt assembly connecting the motor shaft of the driving motor and the first rotating shaft is provided between the motor mounting plate and the base table.

[0013] Further, two horizontal sliding rails and two vertical sliding rails are further provided between the seat body and the base table; the horizontal sliding rails are fixed on the base table, the vertical sliding rails are installed on a transition plate, and first sliders respectively slidingly engaged with the two horizontal sliding rails are installed at both ends of the transition plate; a second slider engaged with the vertical sliding rails is installed on the seat body. In this way, the smoothness of the relative rotation between the seat body and the base table can be ensured.

[0014] Beneficial effects: The drive mechanism for driving the rotation type seed metering mechanism of the present invention has the following

[0015] Beneficial effects:

[0016] (1) The counterweight can effectively balance the large centrifugal force generated during the rotation of the seed metering mechanism, preventing large fluctuations in the base table surface that may affect the operation of the machine, and improving the stability of the machine operation. The ball mechanism can support the lower side of the counterweight and effectively reduce the running resistance of the counterweight.

[0017] (2) Since the rotation radius of the rotation mechanism is very small (generally 1 - 3 cm), by increasing the multiple difference between the second distance and the first distance, a relatively small counterweight can be set to balance the centrifugal force generated by the very 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 arranging the adjustment mechanism and the ball mechanism, the space occupied by the counterweight during rotation can be minimized, and the overall force and the supporting force received by the counterweight can be made balanced, avoiding the counterweight itself from vibrating and affecting the smoothness 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 body, enabling fine adjustment of the rotation effect. Description of the Drawings

[0020] Figure 1 Side view structure diagram of the drive mechanism for driving the rotation type seed metering mechanism;

[0021] Figure 2 Front view structure diagram of the drive mechanism for driving the rotation type seed metering mechanism;

[0022] Figure 3 Top view structure diagram of the drive mechanism for driving the rotation type seed metering mechanism;

[0023] Figure 4 First perspective structure diagram of some structures in the drive mechanism;

[0024] Figure 5 Second perspective structure diagram of some structures in the drive mechanism;

[0025] Figure 6 Overall structure diagram of the drive mechanism and the seed metering mechanism.

[0026] In the figure: 1 - driving motor; 2 - seat body; 3 - first connecting block; 31 - wide groove part; 32 - narrow groove part; 4 - second connecting block; 41 - adjusting hole; 42 - wide body part; 43 - narrow body part; 5 - base table surface; 6 - counterweight block; 61 - first sliding groove; 7 - ball 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 sliding rail; 18 - vertical sliding rail; 19 - transition plate; A - seed metering mechanism. Detailed implementation mode

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] As Figures 1 to 3 shown, a driving mechanism for driving the rotation of the seed metering mechanism includes a base table surface 5, a driving motor 1, and an eccentric mechanism for establishing a transmission relationship between the driving motor 1 and the seat body 2 of the seed metering mechanism A (as Figure 6 shown); the eccentric mechanism includes a first connecting block 3 and a second connecting block 4, the first connecting block 3 and the second connecting block 4 are respectively rotatably connected to the base table surface 5 and the seat body 2, and the two groups of rotating connecting shafts are the first shaft and the second shaft in sequence; the driving motor 1 is drivingly connected to the first connecting block 3;

[0029] A counterweight block 6 is further connected to the second connecting block 4, the counterweight block 6 can slide and adjust its position relative to the second connecting block 4, and a plurality of ball mechanisms 7 are installed on the lower end surface of the counterweight block 6; the ball mechanisms 7 can roll on the upper end surface of the base table surface 5. The first connecting block 3, the second connecting block 4, and the counterweight block 6 are all disposed between the seat body 2 and the base table surface 5; the counterweight block 6 and the second shaft are respectively disposed on both sides of the first shaft, the distance between the center of gravity of the counterweight block 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.

[0030] With the above structure, the counterweight block 6 can effectively balance the large centrifugal force generated when the seed metering mechanism A rotates, so as to prevent the base table surface 5 from generating large fluctuations and affecting the operation of the machine, and improve the stability of the machine operation. The ball mechanisms 7 can support the lower side of the counterweight block 6 and effectively reduce the running resistance of the counterweight block 6.

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

[0032] Preferably, as Figure 4 shown, the counterweight 6 has a first sliding groove 61 therein, and a part of the second connecting block 4 is embedded in the first sliding groove 61; a plurality of adjusting holes 41 are formed on the second connecting block 4, 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, and the side thereof away from the first shaft is arc-shaped; the first sliding groove 61 is centrally arranged relative to the counterweight 6, and two groups of the ball mechanisms 7 are symmetrically arranged on both sides of the first sliding groove 61.

[0034] Thus, by setting the shape of the counterweight 6 and reasonably arranging the adjusting mechanism and the ball mechanisms 7, the space occupied by the rotation of the counterweight 6 can be minimized as much as possible, and the overall force and the supporting force received by the counterweight 6 can be made balanced, so as to avoid the counterweight 6 generating jitter by itself and affecting the stability of the machine tool.

[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 body 2.

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

[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 always in contact with the end of the second screw 9, the position of the second connecting block 4 can be accurately adjusted, so as to realize the accurate 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 table surface 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.

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

[0040] Preferably, two horizontal slide rails 17 and two vertical slide rails 18 are further arranged between the seat body 2 and the base tabletop 5; the horizontal slide rails 17 are fixed on the base tabletop 5, the vertical slide rails 18 are installed on a transition plate 19, and first sliders respectively slidingly matched with the two horizontal slide rails 17 are installed at both ends of the transition plate 19; a second slider matched with the vertical slide rails 18 is installed on the seat body 2. In this way, the smoothness of the relative rotation between the seat body 2 and the base tabletop 5 can be ensured.

[0041] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A driving mechanism for driving a rotary seed metering mechanism to operate, which includes a base table surface (5), a driving motor (1), and an eccentric mechanism for establishing a transmission relationship between the driving motor (1) and the seat body (2) of the seed metering mechanism (A); the eccentric mechanism includes a first connecting block (3) and a second connecting block (4), the first connecting block (3) and the second connecting block (4) are respectively rotatably connected to the base table surface (5) and the seat body (2), and the two sets of rotating shafts for the rotary connection are the first shaft and the second shaft in sequence; the driving motor (1) is drivingly connected to the first connecting block (3); it is characterized in that: A counterweight block (6) is further connected to the second connecting block (4), the counterweight block (6) can slide and adjust its position relative to the second connecting block (4), and a plurality of ball mechanisms (7) are installed on the lower end surface of the counterweight block (6); the ball mechanisms (7) can roll on the upper end surface of the base table surface (5).

2. The drive mechanism for driving the rotation of the seed metering mechanism according to claim 1, characterized in that, The counterweight block (6) has a first chute (61), and a part of the second connecting block (4) is embedded in the first chute (61); a plurality of adjusting holes (41) are formed on the second connecting block (4), and a first screw passing through the adjusting holes (41) fixes the second connecting block (4) relative to the counterweight block (6).

3. The drive mechanism for driving the rotation of the seed metering mechanism according to claim 1, characterized in that, The counterweight block (6) is fan-shaped, and the side away from the first shaft is arc-shaped; the first chute (61) is centered relative to the counterweight block (6), and the two sets of ball mechanisms (7) are symmetrically arranged on both sides of the first chute (61).

4. The drive mechanism for driving the rotation of the seed metering mechanism according to claim 1, characterized in that, 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 body (2).

5. The drive mechanism for driving the rotation of the seed metering mechanism according to claim 4, characterized in that, The first connecting block (3) has a wide groove part (31) and a narrow groove part (32); the second connecting block (4) has a wide body part (42) and a narrow body part (43) respectively placed in the wide groove part (31) and the narrow groove part (32), and there is a transition shoulder between the wide body part (42) and the narrow body part (43); an adjusting screw (8) acting on the transition shoulder and a second screw (9) for fixing the second connecting block (4) are provided on the first connecting block (3).

6. The drive mechanism for driving the rotation of the seed metering mechanism according to claim 1, characterized in that, 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 table surface (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).

7. The drive mechanism for driving the rotation of the seed metering mechanism according to claim 1, characterized in that, A motor mounting plate (14) is installed below the base table surface (5), the motor mounting plate (14) is fixedly installed relative to the base table surface (5) through a plurality of connecting columns (15); the motor base of the driving motor (1) is installed below the motor mounting plate (14), and a synchronous belt assembly (16) connecting the motor shaft of the driving motor (1) and the first rotating shaft (10) is arranged between the motor mounting plate (14) and the base table surface (5).

8. The drive mechanism for driving the rotation of the seed metering mechanism according to claim 1, characterized in that, There are also two horizontally arranged slide rails (17) and two vertically arranged slide rails (18) provided between the seat body (2) and the base table top (5); the horizontally arranged slide rails (17) are fixed on the base table top (5), the vertically arranged slide rails (18) are installed on a transition plate (19), and first sliders respectively slidingly engaged with the two horizontally arranged slide rails (17) are installed at both ends of the transition plate (19); a second slider cooperating with the vertically arranged slide rails (18) is installed on the seat body (2).

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