A rapeseed plug seedling transplanting device

Abstract

The present invention discloses a rape pot-seedling transplanting device, which includes a frame, a seedling pushing plate, a first rocker and a second rocker. The two ends of the first rocker are respectively hinged to the frame and the seedling pushing plate, and the two ends of the second rocker are respectively hinged to the frame and the seedling pushing plate. The frame, the seedling pushing plate, the first rocker and the second rocker are combined to form a four-bar linkage mechanism that allows the seedling pushing plate to reciprocate. The rape pot-seedling transplanting device further includes a driving component for driving the seedling pushing plate to reciprocate. The present invention has the advantages of simple and compact structure, easy processing and manufacturing, low cost, stable and reliable operation, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery, and particularly relates to a rapeseed pot seedling transplanting device. Background Art

[0002] Rapeseed is a major oil crop in China. Rapeseed is characterized by a high planting density, strong vitality, and a preference for water while fearing waterlogging. The rapeseed in China is mainly winter rapeseed, which grows in the middle and lower reaches of the Yangtze River and is rotated with rice for planting. Since the growth period of winter rapeseed is long, it is usually sown in September of the previous year and harvested in May of the following year, resulting in a conflict between its harvest period and the sowing period of the early rice of double-cropping rice, and a conflict between its sowing period and the harvest period of the late rice of double-cropping rice. By adopting the method of seedling raising in a seedling nursery and transplanting at the appropriate age, the overlapping degree of the growth period in the process of multiple crop rotations can be increased, the growth time in the field can be shortened, and multiple-season rotations can be realized. Especially when using pot seedling transplanting, the crop recovers quickly after transplanting, which can shorten the growth time in the field to the greatest extent. However, compared with direct seeding, the transplanting process is complex and costly, and a simplified solution is urgently needed. Due to the high planting density of rapeseed, the commonly used vegetable transplanting machines are difficult to meet the requirements of high-density planting. At the same time, due to the strong vitality of rapeseed, the performance requirements for the transplanting mechanism in rapeseed planting are relatively low. Using a vegetable transplanting machine for transplanting has a complex structure and high operating costs. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a rapeseed pot seedling transplanting device with a simple and compact structure, easy processing and manufacturing, low cost, and stable and reliable operation.

[0004] To solve the above technical problem, the present invention adopts the following technical solutions:

[0005] A rapeseed pot seedling transplanting device includes a frame, a seedling pushing plate, a first rocker and a second rocker. The two ends of the first rocker are respectively hinged to the frame and the seedling pushing plate, and the two ends of the second rocker are respectively hinged to the frame and the seedling pushing plate. The frame, the seedling pushing plate, the first rocker and the second rocker are combined to form a four-bar mechanism that allows the seedling pushing plate to reciprocate. The rapeseed pot seedling transplanting device further includes a driving component for driving the seedling pushing plate to reciprocate.

[0006] As a further improvement of the above technical solution:

[0007] The driving component includes an elastic member and a cam mounted on the frame and driven by a driving mechanism to rotate. The elastic member is connected between the frame and the first rocker, and the elastic member forces the first rocker to abut against the cam so that the first rocker swings reciprocally when the cam rotates.

[0008] The connection line between the two hinge points on the first rocker is parallel and equal in length to the connection line between the two hinge points on the second rocker.

[0009] The rotating shaft of the cam is installed on the frame in a manner that its installation position can be adjusted through a position adjusting mechanism.

[0010] The position adjusting mechanism includes a mounting base, a screw rod, and an adjusting sliding groove provided on the frame. The screw rod penetrates through the adjusting sliding groove and can move along the adjusting sliding groove. One end of the screw rod is connected to the mounting base, and the other end of the sliding rod is threadedly engaged with a locking nut that cooperates with the mounting base to clamp and fix the frame. The rotating shaft of the cam is rotatably installed on the mounting base.

[0011] The direction in which the screw rod slides along the adjusting sliding groove is parallel to the extending direction of the first rocker when the second rocker is vertically arranged.

[0012] The contour surface of the cam has a uniform driving section that forces the first rocker to drive the seedling pushing plate to move at a uniform speed to push out the pot seedlings.

[0013] The contour surface of the cam has a rapid return driving section that forces the first rocker to drive the seedling pushing plate to quickly return after pushing out the pot seedlings.

[0014] The hinge point of the second rocker and the frame is located above the hinge point of the second rocker and the seedling pushing plate. A seedling dropping cylinder for the dropped pot seedlings to pass through is provided on the upper part of the second rocker.

[0015] A flexible brush is also installed on the frame below the seedling dropping cylinder. The frame, the second rocker, and the flexible brush enclose a flexible seedling dropping channel for the pot seedlings dropped from the seedling dropping cylinder to move towards the seedling pushing plate. The horizontal distance between the flexible brush and the seedling pushing plate increases and decreases correspondingly as the seedling pushing plate reciprocates.

[0016] Compared with the prior art, the advantages of the present invention are as follows:

[0017] The rape pot seedling transplanting device of the present invention uses a four-bar linkage mechanism formed by a frame, a seedling pushing plate, a first rocker, and a second rocker to make the seedling pushing plate reciprocate, and can intermittently push out the pot seedlings to realize pot seedling transplanting. Its structure is simple and compact, easy to process and manufacture, low in cost, and stable and reliable in operation. It can meet the requirements of rape pot seedling transplanting with relatively low requirements for the performance of transplanting machinery and high requirements for planting density. Description of the Drawings

[0018] Figure 1 It is a structural schematic diagram of the rape pot seedling transplanting device.

[0019] Figure 2 It is a structural schematic diagram of the seedling pushing plate at different pushing stroke positions.

[0020] Figure 3 It is a coordinate diagram of the contour curve of the cam.

[0021] Legend Explanation:

[0022] 1. Seedling pushing plate; 2. First rocker; 3. Second rocker; 4. Elastic member; 5. Cam; 6. Flexible brush; 7. Seedling dropping tube; 8. Frame. Specific embodiments

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] As Figure 1 and Figure 2 shown, the rapeseed pot seedling transplanting device of this embodiment includes a frame 8, a seedling pushing plate 1, a first rocker 2 and a second rocker 3. The two ends of the first rocker 2 are respectively hinged to the frame 8 and the seedling pushing plate 1, and the two ends of the second rocker 3 are respectively hinged to the frame 8 and the seedling pushing plate 1. The frame 8, the seedling pushing plate 1, the first rocker 2 and the second rocker 3 are combined to form a four-bar linkage mechanism that allows the seedling pushing plate 1 to reciprocate. The rapeseed pot seedling transplanting device further includes a driving component for driving the seedling pushing plate 1 to reciprocate. This rapeseed pot seedling transplanting device uses the four-bar linkage mechanism formed by the frame 8, the seedling pushing plate 1, the first rocker 2 and the second rocker 3 to make the seedling pushing plate 1 reciprocate, and can intermittently push out the pot seedlings, realizing horizontal seedling pushing and transplanting in the trench. Its structure is simple and compact, easy to manufacture, low in cost, and stable and reliable in operation. It can meet the requirements of rapeseed pot seedling transplanting with relatively low requirements for the performance of transplanting machinery and high requirements for planting density.

[0025] In this embodiment, the driving component includes an elastic member 4 and a cam 5 installed on the frame 8 and driven by a driving mechanism to rotate. The elastic member 4 is connected between the frame 8 and the first rocker 2, and the elastic member 4 forces the first rocker 2 to abut against the cam 5 so that the first rocker 2 swings reciprocally when the cam 5 rotates. When the driving mechanism drives the cam 5 to rotate, since the elastic member 4 forces the first rocker 2 to always abut against the cam 5, the first rocker 2 swings reciprocally with the change of the contour surface of the cam 5, and then the seedling pushing plate 1 reciprocates. As Figure 2 shown, the seedling pushing plate 1 is in the initial position I before pushing the seedlings. When pushing the seedlings, it moves from the initial position I through the intermediate position II to the seedling pushing end position III. The distance between the initial position I and the seedling pushing end position III is the pushing stroke of the seedling pushing plate 1, and this pushing stroke is related to the transplanting plant spacing; after pushing out the pot seedlings, the seedling pushing plate 1 moves from the seedling pushing end position III through the intermediate position II to the initial position I again, completing a transplanting cycle action. This driving component uses the combination of the cam 5 and the elastic member 4 that cooperate with the first rocker 2, making the structure of the entire rapeseed pot seedling transplanting device simple and compact and low in cost. The above elastic member 4 is preferably a tension spring. The driving mechanism adopts existing conventional technologies, for example, a combination of a motor and a chain drive mechanism. The motor is connected to the rotating shaft of the cam 5 through the chain drive mechanism and drives it to rotate.

[0026] In this embodiment, the connection line between the two hinge points on the first rocker 2 and the connection line between the two hinge points on the second rocker 3 are parallel to each other and equal in length. That is, the four-bar linkage formed by the frame 8, the seedling pushing plate 1, the first rocker 2, and the second rocker 3 is a parallelogram four-bar linkage. In this way, the reciprocating movement trajectory of the seedling pushing plate 1 is a linear translation movement, which is beneficial to improving the stability and reliability of the movement of pushing out the pot seedlings, and can avoid damaging the pot seedlings. Preferably, the hinge point of the first rocker 2 and the frame 8 and the hinge point of the second rocker 3 and the frame 8 are located in the same horizontal plane, so that the seedling pushing plate 1 reciprocates in the horizontal plane to horizontally push out the pot seedlings. Of course, in other embodiments, the first rocker 2 and the second rocker 3 may not be parallel and unequal in length, so that the seedling pushing plate 1 rotates at a small angle to meet the requirements of different crop transplanting.

[0027] In this embodiment, the rotating shaft of the cam 5 is installed on the frame 8 in a manner that can adjust the installation position through a position adjustment mechanism. By adjusting the installation position of the rotating shaft of the cam 5, the swing stroke range of the first rocker 2 can be adjusted, that is, the stroke range of the reciprocating movement of the seedling pushing plate 1 can be adjusted, so as to realize the adjustment of the transplanting plant spacing and meet the transplanting requirements of different plant spacings for various crops.

[0028] In this embodiment, the position adjustment mechanism includes a mounting seat, a screw rod, and an adjustment sliding groove provided on the frame 8. The screw rod passes through the adjustment sliding groove and can move along the adjustment sliding groove. One end of the screw rod is connected to the mounting seat, and the other end of the sliding rod is threadedly fitted with a locking nut that cooperates with the mounting seat to clamp and fix the frame 8. The rotating shaft of the cam 5 is rotatably installed on the mounting seat. When it is necessary to adjust the installation position of the rotating shaft of the cam 5, loosen the locking nut, and the screw rod together with the locking nut and the mounting seat can be moved along the adjustment sliding groove to adjust the position. After adjustment, tighten the locking nut again to fix the screw rod together with the locking nut and the mounting seat at the adjusted position. This position adjustment mechanism has the advantages of simple structure, convenient adjustment, easy manufacturing, and low cost.

[0029] In this embodiment, the sliding direction of the screw rod along the adjustment sliding groove is parallel to the extension direction of the first rocker 2 when the second rocker 3 is vertically arranged. Affected by the maximum stroke of the cam 5, the position adjustment space of the cam 5 is limited. Making the sliding direction of the screw rod along the adjustment sliding groove parallel to the extension direction of the first rocker 2 when the second rocker 3 is vertically arranged can ensure "zero-speed" seedling transplanting during horizontal seedling pushing transplanting under different plant spacing conditions and improve the transplanting quality after the change of plant spacing.

[0030] In this embodiment, the contour surface of the cam 5 has a uniform driving section that forces the first rocker 2 to drive the seedling pushing plate 1 to move at a uniform speed to push out the pot seedlings. The uniform driving section forces the first rocker 2 to drive the seedling pushing plate 1 to move at a uniform speed to push out the pot seedlings, which can ensure sufficient zero-speed seedling transplanting time and improve the seedling transplanting quality.

[0031] In this embodiment, the contour surface of the cam 5 has a rapid return driving section that forces the first rocker 2 to quickly return with the seedling pushing plate 1 after pushing out the pot seedlings. The rapid return driving section can force the first rocker 2 to quickly return with the seedling pushing plate 1 after pushing out the pot seedlings, which can increase the seedling receiving time and improve the accuracy of seedling receiving.

[0032] In order to enable the transplanting device to have the characteristics of transplanting, the zero-speed transplanting principle must be satisfied. That is, the machine moves forward along the forward direction, the seedling pushing plate 1 of the transplanting device pushes the seedlings backward, and the seedling pushing plate 1 has a certain moving speed relative to the machine. After speed compounding, the moving speed of the seedling pushing plate 1 relative to the ground approaches zero speed during the key stroke of the transplanting stroke. Only when the transplanting device satisfies the zero-speed transplanting principle can the transplanting quality be guaranteed. If the speed of the seedling pushing plate 1 relative to the ground is slow, the seedlings are prone to fall forward, and if the speed is fast, the seedlings will be thrown backward. The transplanting device of this embodiment has the characteristic of "zero-speed" seedling planting when the transplanting machine runs in a certain fixed speed range.

[0033] In this embodiment, the change law of the pushing stroke of the cam 5 is as Figure 3 shown. Within one revolution (360°) of the cam 5, 0 to 180° is the pushing stroke of the cam 5, and 181° to 360° is the return stroke of the cam 5. Between 0 and 45° of the cam 5, as shown by the transition pushing stroke A of the cam 5, the pushing stroke of the cam 5 is a smooth transition from the base circle. 46° to 175° is the pushing stroke of the cam 5, as shown by the pushing stroke B of the cam 5. At this time, the pushing stroke trajectory is closely related to the transplanting trajectory. 175° to 190° is the transition stroke of the cam 5, as shown by the transition stroke C of the cam 5. Between 190° and 300° is the rapid return stroke, as shown by the rapid return stroke D of the cam 5. The pushing stroke of the cam 5 decreases rapidly, realizing the rapid return of the seedling pushing plate 1, which is beneficial to extending the seedling receiving time and improving the accuracy of the transplanting mechanism for receiving seedlings. Between 191° and 360°, the cam 5 has no pushing stroke, and the transplanting device pauses in this interval to wait for seedling receiving, which can increase the seedling receiving waiting time and improve the accuracy of seedling receiving. The contour line J of the cam 5 is a variable curvature line relative to the reference straight line K. The change law of the pushing stroke of the cam 5 corresponds to the movement trajectory of the seedling pushing plate 1 (relative to the ground, and the speeds of the transplanting machine are respectively superimposed in the x 1 and y 1 directions.). As shown in the X 1 OY 1 coordinate system, section a is the start of the seedling pushing of the seedling pushing plate 1, section b is the constant-speed seedling pushing of the seedling pushing plate 1, and its movement trajectory is a straight line. The longer the straight line segment, the higher the transplanting quality. Section c is the stroke switching of the seedling pushing plate 1, section d is the rapid return trajectory of the seedling pushing plate 1, and the greater its slope, the better the rapid return effect. Section e is the stroke of the seedling pushing plate 1 relative to the near stop of the transplanting device. The slope of section d is greater than that of a, and the slope of a is greater than that of section e.

[0034] Of course, in other embodiments, the cam 5 profile may also have no transition sections A and C, or the cam 5 profile may have no transition sections A and C and no near-stop section E. This has no impact on the transplanting quality and has a slight impact on the seedling receiving accuracy of the transplanting device.

[0035] In this embodiment, the hinge point of the second rocker 3 and the frame 8 is located above the hinge point of the second rocker 3 and the seedling pushing plate 1. A seedling dropping tube 7 for allowing the dropped pot seedlings to pass through is provided on the upper part of the second rocker 3, which is beneficial to ensuring reliable seedling dropping of the pot seedlings and improving the accuracy of the seedling dropping position. Preferably, the seedling dropping tube 7 is a square tube or a circular tube.

[0036] In this embodiment, a flexible brush 6 is further installed on the frame 8 and located below the seedling dropping tube 7. The frame 8, the second rocker 3 and the flexible brush 6 enclose a flexible seedling dropping channel for the pot seedlings falling from the seedling dropping tube 7 to move towards the seedling pushing plate 1. The horizontal distance between the flexible brush 6 and the seedling pushing plate 1 increases and decreases correspondingly as the seedling pushing plate 1 reciprocates. When the pot seedlings fall from the seedling dropping tube 7, they fall through the flexible seedling dropping channel to the seedling pushing position where the seedling pushing plate 1 is located. During this process, the flexible seedling dropping channel holds the pot seedlings to fall in a vertical posture, preventing the pot seedlings from lodging, which is beneficial to improving the transplanting uprightness and the stability and reliability of the seedling pushing plate 1 to push out the pot seedlings; at the same time, the flexible brush 6 will not cause hard damage to the pot seedlings, and can greatly reduce the damage to the pot seedlings.

[0037] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. For those skilled in the art of this technology, the improvements and transformations obtained without departing from the technical concept of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A rapeseed plug seedling transplanting device, characterized in that: It includes a frame (8), a seedling pushing plate (1), a first rocker (2) and a second rocker (3). The two ends of the first rocker (2) are respectively hinged to the frame (8) and the seedling pushing plate (1), and the two ends of the second rocker (3) are respectively hinged to the frame (8) and the seedling pushing plate (1). The frame (8), the seedling pushing plate (1), the first rocker (2) and the second rocker (3) are combined to form a four-bar mechanism that allows the seedling pushing plate (1) to reciprocate. The rapeseed plug seedling transplanting device also includes a driving component for driving the seedling pushing plate (1) to reciprocate; the connection line between the two hinge points on the first rocker (2) is parallel to and equal in length to the connection line between the two hinge points on the second rocker (3); the hinge point of the first rocker (2) and the frame (8) and the hinge point of the second rocker (3) and the frame (8) are located in the same horizontal plane, so that the seedling pushing plate (1) reciprocates in the horizontal plane to horizontally push out the plug seedlings; The driving component includes an elastic member (4) and a cam (5) installed on the frame (8) and driven by a driving mechanism to rotate. The elastic member (4) is connected between the frame (8) and the first rocker (2), and the elastic member (4) forces the first rocker (2) to abut against the cam (5) so that the first rocker (2) swings reciprocally when the cam (5) rotates; the contour surface of the cam (5) has a uniform driving section that forces the first rocker (2) to drive the seedling pushing plate (1) to move at a uniform speed to push out the plug seedlings; the contour surface of the cam (5) has a rapid return driving section that forces the first rocker (2) to drive the seedling pushing plate (1) to quickly return after pushing out the plug seedlings; The rotating shaft of the cam (5) is installed on the frame (8) in a way that its installation position can be adjusted; the position adjustment mechanism includes a mounting seat, a screw rod and an adjustment chute provided on the frame (8). The screw rod passes through the adjustment chute and can move along the adjustment chute. The direction in which the screw rod slides along the adjustment chute is parallel to the extension direction of the first rocker (2) when the second rocker (3) is vertically arranged; one end of the screw rod is connected to the mounting seat, and the other end of the screw rod is threadedly connected with a locking nut that cooperates with the mounting seat to clamp and fix the frame (8). The rotating shaft of the cam (5) is rotatably installed on the mounting seat; Within one revolution of the cam 5, 0 to 180° is the pushing stroke of the cam 5, and 181° to 360° is the return stroke of the cam 5. Between 0 and 45° of the cam 5, the pushing stroke of the cam 5 is a smooth transition from the base circle. 46° to 175° is the pushing stroke of the cam 5, and the pushing stroke trajectory at this time is closely related to the transplanting trajectory. 175° to 190° is the transition stroke of the cam 5. Between 190° and 300° is the rapid retraction stroke to realize the quick return of the seedling pushing plate (1). Between 191° and 360°, the cam 5 has no pushing stroke, and the transplanting device pauses in this interval to wait for receiving seedlings.

2. The rapeseed plug seedling transplanting device according to claim 1, characterized in that: The hinge point of the second rocker (3) and the frame (8) is located above the hinge point of the second rocker (3) and the seedling pushing plate (1). A seedling dropping tube (7) for allowing the dropped pot seedlings to pass through is provided on the upper part of the second rocker (3).

3. The rape pot seedling transplanting device according to claim 2, characterized in that: A flexible brush (6) is further installed on the frame (8) and located below the seedling dropping tube (7). The frame (8), the second rocker (3) and the flexible brush (6) enclose a flexible seedling dropping channel for the pot seedlings falling from the seedling dropping tube (7) to move towards the seedling pushing plate (1). The distance between the flexible brush (6) and the seedling pushing plate (1) in the horizontal direction increases and decreases correspondingly with the reciprocating movement of the seedling pushing plate (1).

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