CN116897660A - Continuous zero-speed seedling throwing and transplanting mechanism for crop seedlings and application method - Google Patents

Abstract

The application discloses a continuous zero-speed seedling throwing transplanting mechanism for crop seedlings, which belongs to the technical field of mechanized planting of crops, wherein seedlings are manually thrown into a seedling throwing cup disc, the seedling throwing cup disc rotates, the seedlings fall into an intermittent reversing mechanism, seedling receiving and seedling reversing are realized, the seedlings fall into a seedling throwing grabbing and planting mechanism after the seedling reversing, the seedling grabbing is realized, the seedling reversing is realized under the driving of a first chain transmission mechanism, a second-stage speed gear set realizes that the translation speed of a chain wheel at the lower part of the first chain transmission mechanism is relatively greatly static, the seedling throwing grabbing and planting mechanism is fixed on the first chain transmission mechanism, so that absolute zero-speed required in the seedling transplanting process and absolute zero-speed required in the agronomic process are realized; continuous line production ensures the verticality of the transplanted seedlings and improves the transplanting speed.

Description

Continuous zero-speed seedling throwing and transplanting mechanism for crop seedlings and application method

Technical Field

The application belongs to the technical field of mechanized planting of crops, and particularly relates to a continuous zero-speed seedling transplanting mechanism for crop seedlings and a use method thereof.

Background

Compared with direct seed planting, farmers can plant commercial seedlings into soil, so that the growing period of crops can be shortened, the survival rate of the crops can be improved, and the influence of natural disasters and insect pests on the seed germination and plant formation process can be reduced. In order to ensure the erection degree of the transplanted seedlings, the traditional seedling transplanting machine uses a complex seedling throwing mechanism, but still cannot throw seedlings in absolute zero degree or throw seedlings in absolute zero speed for too short time, so that the relative motion of seedlings and farmlands exists in the transplanting process, and the relative erection of the transplanted seedlings can be ensured only by reducing the operation speed of machines. Nonetheless, some agricultural machinery also need to manually centralize a portion of the crop seedlings after transplanting. Therefore, a set of simple and feasible continuous zero-speed seedling throwing mechanism for the crop seedlings is designed for solving the problem of the upright degree of the seedlings after throwing the seedlings, and the improvement of the transplanting speed and the transplanting upright degree is a technical problem to be solved urgently.

Disclosure of Invention

In order to overcome the defects of the prior art, the application aims to provide a continuous zero-speed seedling throwing and transplanting mechanism for crop seedlings and a use method thereof, so as to solve the technical problems that the continuous zero-speed seedling throwing mechanism for crop seedlings in the prior art is low in transplanting speed and can not guarantee transplanting verticality.

In order to achieve the above purpose, the application is realized by adopting the following technical scheme:

a continuous zero-speed seedling transplanting mechanism for crop seedlings, comprising: the driving wheel of the driving mechanism is coaxially provided with a secondary speed matching gear set; the front of the mechanism of the second-stage speed gear set is provided with a furrow opener, the rear is provided with a soil covering compaction wheel, the second-stage speed gear set is connected with a first chain transmission mechanism, the first chain transmission mechanism is provided with a seedling throwing grabbing and planting mechanism, a seedling throwing cup tray is arranged above the seedling throwing grabbing and planting mechanism, and an intermittent reversing mechanism for receiving and controlling seedling reversing is arranged below the seedling throwing cup tray.

Preferably, the secondary speed gear set includes: the first driven gear is meshed with the driving gear on one side, and the second driven gear is coaxially connected with the first chain transmission mechanism on the other side.

Preferably, the first chain transmission mechanism comprises four chain wheels and two transmission chains, the transmission chains are meshed with the chain wheels, seedling grabbing and planting mechanisms are arranged on the transmission chains, the chain wheels arranged on one side of the second driven gear are coaxially connected with the second driven gear, and the two chain wheels on the other end of the transmission chains are coaxially connected.

Preferably, the seedling throwing, grabbing and planting mechanism comprises: a plurality of transplanting tongs, it fixes on first chain drive mechanism to transplant the tongs, and it is provided with the tongs guide slot that is used for controlling to transplant the tongs and get and put to transplant the tongs both ends, tongs guide slot top is provided with the frame, the below is provided with dials the soil board, be provided with the baffle in the frame, be provided with in the frame of baffle top and throw seedling cup dish, and offered the opening that is used for guiding the seedling to pass through on the baffle of being connected with the frame, the baffle lower extreme is provided with snatchs the platform, the frame below is provided with intermittent type formula reverse mechanism in baffle one side.

Preferably, the transplanting gripper comprises a push rod, gripper fixing frames are arranged at two ends of the push rod, the gripper fixing frames are fixedly connected to the first chain transmission mechanism, rollers matched with the gripper guide grooves are arranged at the ends of the push rod, a reset spring is arranged between the rollers and the gripper fixing frames, and a gripper plate for picking and placing seedlings is arranged at the other end of the push rod.

Preferably, the seedling throwing cup disc comprises a rotary disc, the rotary disc is arranged on the seedling throwing grabbing and planting mechanism, seedling cups are uniformly distributed on the rotary disc along the circumferential direction, a second intermittent mechanism for driving the rotary disc is arranged below the rotary disc, and the second intermittent mechanism is connected with the intermittent reversing mechanism through a group of bevel gears.

Preferably, the seedling throwing cup disc comprises a rotary disc, the rotary disc is arranged on the seedling throwing grabbing and planting mechanism, seedling cups are uniformly distributed on the rotary disc along the circumferential direction, a gear pair for driving the rotary disc is arranged below the rotary disc, and a stepping motor for driving the gear pair is arranged on one side of the gear pair.

Preferably, the intermittent reversing mechanism comprises a first intermittent mechanism and a reversing wheel, wherein a driving wheel of the first intermittent mechanism is connected with the first chain transmission mechanism through a second chain transmission mechanism, and a driven wheel of the first intermittent mechanism is coaxially connected with the reversing wheel.

Preferably, the driving mechanism includes: wheel chassis and track chassis.

The application discloses a use method of a continuous zero-speed seedling transplanting mechanism for crop seedlings, which comprises the following steps:

driving a seedling throwing cup disc filled with seedlings to rotate;

the seedling falls into the intermittent reversing mechanism, and the intermittent reversing mechanism drives the seedling to reverse and fall into the seedling throwing grabbing and planting mechanism;

and transplanting seedlings by a seedling throwing grabbing and planting mechanism.

Compared with the prior art, the application has the following beneficial effects:

according to the continuous zero-speed seedling throwing transplanting mechanism for the crop seedlings, disclosed by the application, seedlings are manually thrown into a seedling throwing cup disc, the seedling throwing cup disc rotates, the seedlings fall into an intermittent reversing mechanism, seedling receiving and seedling reversing are realized, the seedlings fall into a seedling throwing grabbing and planting mechanism after the seedling reversing, seedling grabbing is realized, seedling reversing is realized again under the driving of a first chain transmission mechanism, a second-stage speed gear set realizes that the translation speed of a chain wheel at the lower part of the first chain transmission mechanism is relatively greatly static, and the seedling throwing grabbing and planting mechanism is fixed on the first chain transmission mechanism, so that absolute zero-speed holding time required by the seedling transplanting process and absolute zero-speed holding time required by the agronomic process are realized; continuous line production ensures the verticality of the transplanted seedlings and improves the transplanting speed.

Drawings

FIG. 1 is a schematic diagram of the structure of the present application;

FIG. 2 is a schematic diagram of an intermittent reversing mechanism according to the present application;

FIG. 3 is a schematic view of a seedling grabbing and planting mechanism of the application;

fig. 4 is a schematic structural view of the transplanting gripper of the present application;

FIG. 5 is a schematic view of the structure of a first seedling throwing cup tray of the present application;

fig. 6 is a schematic structural view of a second bowl for seeding in accordance with the present application.

Wherein: 1-a seedling throwing cup disc; 2-intermittent inversion mechanism; 3-a seedling throwing grabbing and planting mechanism; 4-a furrow opener; 5-second-stage speed-distributing gear set; 6-earthing compacting wheels; 101-seedling cups; 102-a turntable; 103-a frame; 104-a guide plate; 105-grabbing a platform; 106-reversing wheel; 107-a first intermittent mechanism; 201-a gripper guide slot; 202, transplanting grippers; 203-a chain drive; 204-a second driven gear; 205-a first driven gear; 206-a drive gear; 207-a soil poking plate; 301-a grip plate; 302—a push rod; 303-a gripper fixing frame; 304-a return spring; 305-a roller; 401-a second intermittent mechanism; 402-bevel gears; 501-a gear pair; 502-stepper motor.

Detailed Description

In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The application is described in further detail below with reference to the attached drawing figures:

the application relates to mechanization of a continuous zero-speed transplanting process of crop seedlings, in particular to a method for keeping absolute zero speed of seedlings in a time interval for realizing the seedling throwing and soil covering operation in the transplanting process of the crop seedlings so as to ensure the verticality of the transplanted crop seedlings, reduce the agricultural labor intensity and improve the transplanting speed and the transplanting quality. The application realizes absolute zero speed required by the rapid and continuous transplanting process of crop seedlings and absolute zero speed retention time required by the agronomic process, ensures the verticality of the transplanted seedlings and improves the transplanting speed and the transplanting quality.

Referring to fig. 1, the application discloses a continuous zero-speed seedling transplanting mechanism for crop seedlings, which comprises: the driving wheel of the driving mechanism is coaxially provided with a secondary speed matching gear set 5; the front that the mechanism of second grade speed gear group 5 marched is provided with furrow opener 4, and the rear is provided with earthing compaction wheel 6, and is connected with first chain drive mechanism 203 on the second grade speed gear group 5, is provided with on the first chain drive mechanism 203 and throws seedling grabbing and plant mechanism 3, throws seedling grabbing and plant mechanism 3 top and be provided with throw seedling cup dish 1, throw seedling cup dish 1 below and be provided with intermittent type formula reverse mechanism 2 that is used for accepting and control seedling reversal. The seedling is thrown into the seedling throwing cup disc manually, the seedling throwing cup disc rotates, the seedling falls into the intermittent reversing mechanism, the seedling receiving and seedling reversing are realized, the seedling falling into the seedling throwing grabbing and planting mechanism after seedling reversing is realized, the seedling grabbing is realized, the seedling reversing is realized again under the driving of the first chain transmission mechanism, the translation speed of the chain wheel at the lower part of the first chain transmission mechanism is relatively greatly static by the two-stage speed distribution gear set, and the seedling throwing grabbing and planting mechanism is fixed on the first chain transmission mechanism, so that absolute zero speed required in the seedling transplanting process and absolute zero speed required in the agronomic process are realized.

The using method comprises the following steps:

driving a seedling throwing cup tray 1 filled with seedlings to rotate;

the seedlings fall into the intermittent reversing mechanism 2, and the intermittent reversing mechanism 2 drives the seedlings to reverse and fall into the seedling throwing grabbing and planting mechanism 3;

and the seedling throwing grabbing and planting mechanism 3 is used for transplanting seedlings.

In some embodiments, the two-stage speed gearset 5 includes: the first driven gear 205 is meshed with the driving gear 206 on one side and the second driven gear 204 on the other side, and the second driven gear 204 is coaxially connected with the first chain transmission mechanism 203.

In some embodiments, the first chain transmission mechanism 203 includes four sprockets and two transmission chains, the transmission chains are meshed with the sprockets, the transmission chains are provided with seedling grabbing and planting mechanisms 3, the sprockets arranged on one side of the second driven gear 204 are coaxially connected with the second driven gear 204, and the two sprockets on the other end of the transmission chains are coaxially connected.

In some embodiments, the seedling grabbing and planting mechanism 3 includes: a plurality of transplanting grippers 202, the transplanting grippers 202 are fixed on a first chain transmission mechanism 203, two ends of each transplanting gripper 202 are provided with gripper guide grooves 201 for controlling the transplanting grippers 202 to take and put, a frame 103 is arranged above each gripper guide groove 201, a soil shifting plate 207 is arranged below each gripper guide groove, a guide plate 104 is arranged on each frame 103, a seedling throwing cup tray 1 is arranged on each frame 103 above each guide plate 104, gaps for guiding seedlings to pass through are formed in each guide plate 104 connected with each frame 103, a grabbing platform 105 is arranged at the lower end of each guide plate 104, and an intermittent reversing mechanism 2 is arranged below each frame 103 and on one side of each guide plate 104.

In some embodiments, the transplanting gripper 202 includes a push rod 302, two ends of the push rod 302 are provided with gripper fixing frames 303, the gripper fixing frames 303 are fixedly connected to the first chain transmission mechanism 203, the end of the push rod 302 is provided with a roller 305 matched with the gripper guiding groove 201, a reset spring 304 is arranged between the roller 305 and the gripper fixing frames 303, and the other end of the push rod 302 is provided with a gripper plate 301 for picking and placing seedlings.

Preferably, the soil poking plate 208 is used for earthing the seedlings before the transplanting grippers 202 are loosened, so that the seedlings are prevented from lodging due to uneven bottoms of seedling furrows after the grippers are loosened.

Preferably, the transplanting grippers 202 are controlled by the gripper guide grooves to realize seedling clamping and loosening, so that the reliability is high.

Preferably, a flexible material is fixed on the grip plate 301 to secure the clamping force while preventing the clamping injury.

In some embodiments, referring to fig. 5, the seedling-throwing cup tray 1 includes a turntable 102, the turntable 102 is disposed on the seedling-throwing, grabbing and planting mechanism 3, seedling cups 101 are uniformly distributed on the turntable 102 along the circumferential direction, a second intermittent mechanism 401 for driving the turntable 102 is disposed below the turntable 102, and the second intermittent mechanism 401 is connected with the intermittent reversing mechanism 2 through a set of bevel gears 402. The control turntable 102 and the reversing wheel 106 are matched in action phase to ensure that the intermittent rotation action of the seedling throwing cup disc and the intermittent action of the turnover mechanism are performed in sequence: firstly, the seedling throwing cup plate moves once, the seedlings fall into the intermittent turnover mechanism, and during the period that the seedling throwing cup plate stops moving, the intermittent turnover mechanism starts moving, the seedlings are taken away, and the next movement cycle is entered.

In some embodiments, referring to fig. 6, the seedling-throwing cup tray 1 includes a turntable 102, the turntable 102 is disposed on the seedling-throwing, grabbing and planting mechanism 3, seedling cups 101 are uniformly distributed on the turntable 102 along a circumferential direction, a gear pair 501 for driving the turntable 102 is disposed below the turntable 102, and a stepping motor 502 for driving the gear pair 501 is disposed on one side of the gear pair 501. The control turntable 102 and the reversing wheel 106 are matched in action phase to ensure that the intermittent rotation action of the seedling throwing cup disc and the intermittent action of the turnover mechanism are performed in sequence: firstly, the seedling throwing cup plate moves once, the seedlings fall into the intermittent turnover mechanism, and during the period that the seedling throwing cup plate stops moving, the intermittent turnover mechanism starts moving, the seedlings are taken away, and the next movement cycle is entered.

In some embodiments, the intermittent reversing mechanism 2 includes a first intermittent mechanism 107 and a reversing wheel 106, where a driving wheel of the first intermittent mechanism 107 is connected to the first chain transmission mechanism 203 through a second chain transmission mechanism, and a driven wheel of the first intermittent mechanism 107 is coaxially connected to the reversing wheel 106.

In some embodiments, the drive mechanism comprises: agricultural machine chassis such as wheel chassis and caterpillar chassis can all be carried.

[ example ]

Referring to fig. 1, the application discloses a quick continuous zero-speed seedling transplanting mechanism for crop seedlings, which comprises a seedling throwing cup tray 1, an intermittent reversing mechanism 2, an automatic gripping and loosening seedling grabbing mechanism 3, a secondary speed gear set 5, a furrow opener 4 and a soil covering compaction wheel 6. According to the application, seedlings are manually thrown into the seedling cup 101 and rotate along with the seedling cup 101, the seedlings fall into the intermittent reversing mechanism 2, and the intermittent reversing mechanism 2 is driven by the first intermittent mechanism 107, so that seedling receiving and seedling reversing are realized; the seedling is reversed and falls into the grabbing platform 105, the transplanting gripper 202 in the seedling grabbing and planting mechanism 3 is controlled by the gripper guide groove 201 to grab the seedling on the grabbing platform 105, and the transplanting gripper 202 is driven by the chain wheel 203 to realize seedling reversal again; the secondary speed gear set 5 driven by the wheel edge realizes that the translation speed of the lower chain wheel is relatively greatly static, and the transplanting gripper 202 is fixed on the chain wheel and is at the same speed with the chain wheel, so that the gripper, the seedling and the earth are absolutely static in the advancing direction of the mechanism; after the seedling is vertical to the ground, the root of the seedling is placed in a seedling ditch opened by the furrow opener 4, the soil poking plate 208 is used for earthing the seedling, the grip guide groove 201 controls the transplanting grip 202 to loosen the seedling, and finally the earthing compaction wheel 6 is used for earthing and compacting the seedling. Realizing rapid and continuous zero-speed seedling throwing; the application realizes absolute zero speed required by the rapid and continuous transplanting process of crop seedlings and absolute zero speed retention time required by the agronomic process, and ensures the verticality of the transplanted seedlings.

Referring to fig. 2, a seedling throwing cup tray and an intermittent reversing mechanism are used for manually placing seedlings into seedling cups 101, and the seedling cups 101 intermittently rotate on a turntable 102. The reversing wheel 106 is driven by the first intermittent mechanism 107 to intermittently rotate along the direction shown in the figure, and each intermittent stop of the reversing wheel 106 ensures that the seedling cup on the reversing wheel is opposite to the opening on the frame 103. When the seedling cup 101 reaches the opening position of the frame 103, the seedling falls into the seedling cup which is in an intermittent static state on the reversing wheel 106 under the action of gravity, and the intermittent motion of the reversing wheel is matched with the intermittent motion of the seedling throwing cup tray, so that the relative static state between the reversing wheel and the seedling throwing cup tray in the seedling falling process is ensured. When the seedling roots fall into the seedling cup on the reversing wheel 106, the reversing wheel rotates first, and the seedling stems are separated from the seedling cup 101 and are reversed along with the reversing wheel 106 under the guidance of the V-shaped guide opening of the frame 104. The frame 104 protects the seedlings from falling out of the cup of the counter-rotating wheel 106 during the counter-rotation. After the seedling has completed 180 degree inversion, it falls into the gripping platform 105.

Referring to fig. 3, the seedling grabbing and planting mechanism is used for achieving transplanting after the seedling falls into the grabbing platform and the seedling grabbing and transplanting mechanism is used for grabbing and reversing the seedling. The transplanting gripper 202 is fixed on a chain of the chain transmission 203, and the chain drives the transplanting gripper 202 to roll on the gripper guide groove 201 along with the rotation of the chain wheel, and the gripper is controlled by a concave-convex supporting surface designed on the gripper guide groove 201 to realize the clamping and loosening actions.

The arrow in the figure indicates the advancing direction of the continuous operation of the transplanting mechanism, and in order to realize absolute zero-speed seedling throwing in the transplanting process, the absolute speed of the transplanting gripper 202 in the moving direction of the mechanism must be zero in the transplanting process, namely, the absolute speed of the lower chain of the chain transmission 203 in the moving direction of the mechanism is required to be zero. To achieve absolute zero, the secondary gear ratio needs to meet the following conditions:

the driving gear 206 is coaxial with the mechanism walking driving wheel, namely, the angular speed is the same, and the advancing speed of the transplanting mechanism is as follows:

V _{vehicle with a frame} ＝ω _{Vehicle with a frame} r _{Wheel of vehicle}

Wherein omega _{Vehicle with a frame} R is the rotation speed of the driving shaft of the wheel _{Wheel of vehicle} Is the running radius of the wheel.

The chain moving speed is as follows:

V _{sprocket wheel} ＝ω _{Gear 2} r _{Sprocket wheel}

Wherein omega _{Gear 2} To drive the angular velocity of the sprocket r _{Sprocket wheel} For driving sprocket pitch radius。

The lower chain speed in chain drive 203 is opposite to the advancing direction of the transplanting mechanism, and only V is needed to make the absolute moving speed 0 _{Sprocket wheel} ＝V _{Vehicle with a frame} The secondary gear transmission therefore needs to meet the transmission ratio:

the two-stage speed reduction consisting of the driving gear 206 and the driven gears 205 and 204 is used for ensuring the rotation direction of the chain wheel on the premise of ensuring the transmission ratio, so that the seedling picking disc is smoothly picked up by the gripper mechanism.

Driven by chain transmission 203, the grippers realize secondary inversion of seedlings, and the seedlings are placed in seedling furrows opened by the furrow opener 4, the soil poking plate 208 is fixed on the rack, and before the transplanting grippers 202 are loosened, the soil poking plate 207 covers the seedlings, so that the seedlings are prevented from lodging due to uneven bottoms of the seedling furrows after the grippers are loosened. After the soil shifting plate 208 finishes earthing, the transplanting grippers 203 loosen seedlings under the control of the gripper guide grooves 201, and finally compaction of the seedlings is realized by the compacting wheels 209, so that seedling transplanting is finished. The seedling grabbing and planting mechanism realizes absolute zero speed required by the rapid continuous transplanting process of crop seedlings and absolute zero speed retention time required by the agronomic process, ensures the verticality of the transplanted seedlings and improves the transplanting speed.

Referring to fig. 4, a schematic structural view of the transplanting gripper is shown, and the gripper fixing frame 303 is fixed to the chain of the chain transmission 203 and rotates together with the chain. The grabbing surface of the grabbing plate 301 is adhered or coated with soft materials such as thicker sponge or soft rubber, the soft materials deform to tightly wrap the seedlings, and the grabbing plate is prevented from clamping the seedlings in the process of clamping the seedlings on the premise of ensuring the clamping force. The roller 305 is tightly pressed against the gripper guide groove 201 by the return spring 304, and the roller 305 rolls along the gripper guide groove 201 as the chain moves, and the gripping and releasing of the seedling gripper 301 is controlled by the gripper guide groove 201.

In summary, the application realizes absolute zero speed required by seedling transplanting process and absolute zero speed holding time required by agricultural process through chain transmission and secondary gear reduction, realizes absolute zero speed required by crop seedling rapid continuous transplanting process and absolute zero speed holding time required by agricultural process, ensures the erection degree after seedling transplanting, and improves transplanting speed.

The above is only for illustrating the technical idea of the present application, and the protection scope of the present application is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present application falls within the protection scope of the claims of the present application.

Claims (10)

1. A continuous zero-speed seedling transplanting mechanism for crop seedlings, which is characterized by comprising: the driving wheel of the driving mechanism is coaxially provided with a secondary speed matching gear set (5); the front that the mechanism of second grade speed gear group (5) marched is provided with furrow opener (4), and the rear is provided with earthing compaction wheel (6), and is connected with first chain drive mechanism (203) on second grade speed gear group (5), is provided with on first chain drive mechanism (203) and throws seedling snatchs and plant mechanism (3), throws seedling snatchs and plant mechanism (3) top and be provided with throw seedling cup dish (1), throw seedling cup dish (1) below and be provided with intermittent type formula reverse mechanism (2) that are used for accepting and control seedling reversal.

2. A continuous zero speed seedling transplanting mechanism for crop seedlings as claimed in claim 1, wherein said secondary speed gear set (5) comprises: the chain transmission mechanism comprises a driving gear (206), a first driven gear (205) and a second driven gear (204), wherein one side of the first driven gear (205) is meshed with the driving gear (206), the other side of the first driven gear is meshed with the second driven gear (204), and the second driven gear (204) is coaxially connected with the first chain transmission mechanism (203).

3. The continuous zero-speed seedling transplanting mechanism for crops according to claim 2, wherein the first chain transmission mechanism (203) comprises four chain wheels and two transmission chains, the transmission chains are meshed with the chain wheels, the transmission chains are provided with seedling grabbing and planting mechanisms (3), the chain wheels arranged on one side of the second driven gear (204) are coaxially connected with the second driven gear (204), and the two chain wheels on the other end of the transmission chains are coaxially connected.

4. The continuous zero-speed seedling transplanting mechanism for crops according to claim 1, wherein the seedling grabbing and planting mechanism (3) comprises: a plurality of transplanting tongs (202), it fixes on first chain drive mechanism (203) to transplant tongs (202), and it is provided with tongs guide slot (201) that are used for controlling to transplant tongs (202) to get put to transplant tongs (202) both ends, tongs guide slot (201) top is provided with frame (103), the below is provided with dials native board (207), be provided with baffle (104) on frame (103), be provided with on frame (103) of baffle (104) top and throw seedling cup dish (1), and offer the opening that is used for guiding the seedling to pass through on baffle (104) that are connected with frame (103), baffle (104) lower extreme is provided with snatchs platform (105), be provided with intermittent type reverse mechanism (2) below frame (103) in baffle (104) one side.

5. The continuous zero-speed seedling transplanting mechanism for crop seedlings according to claim 4, wherein the transplanting gripper (202) comprises a push rod (302), gripper fixing frames (303) are arranged at two ends of the push rod (302), the gripper fixing frames (303) are fixedly connected to the first chain transmission mechanism (203), rollers (305) matched with the gripper guide grooves (201) are arranged at ends of the push rod (302), reset springs (304) are arranged between the rollers (305) and the gripper fixing frames (303), and a gripper plate (301) for picking and placing seedlings is arranged at the other end of the push rod (302).

6. The continuous zero-speed seedling transplanting mechanism for crop seedlings according to claim 1, wherein the seedling throwing cup tray (1) comprises a rotary tray (102), the rotary tray (102) is arranged on the seedling throwing grabbing and planting mechanism (3), seedling cups (101) are uniformly distributed on the rotary tray (102) along the circumferential direction, a second intermittent mechanism (401) for driving the rotary tray (102) is arranged below the rotary tray (102), and the second intermittent mechanism (401) is connected with the intermittent reversing mechanism (2) through a group of bevel gears (402).

7. The continuous zero-speed seedling transplanting mechanism for crop seedlings according to claim 1, wherein the seedling throwing cup tray (1) comprises a rotary tray (102), the rotary tray (102) is arranged on the seedling throwing grabbing and planting mechanism (3), seedling cups (101) are uniformly distributed on the rotary tray (102) along the circumferential direction, a gear pair (501) for driving the rotary tray (102) is arranged below the rotary tray (102), and a stepping motor (502) for driving the gear pair (501) is arranged on one side of the gear pair (501).

8. The continuous zero-speed seedling transplanting mechanism for crop seedlings according to claim 1, wherein the intermittent reversing mechanism (2) comprises a first intermittent mechanism (107) and a reversing wheel (106), a driving wheel of the first intermittent mechanism (107) is connected with the first chain transmission mechanism (203) through a second chain transmission mechanism, and a driven wheel of the first intermittent mechanism (107) is coaxially connected with the reversing wheel (106).

9. The continuous zero-speed seedling transplanting mechanism for crop seedlings as set forth in claim 1, wherein said drive mechanism includes: wheel chassis and track chassis.

10. The method for using the continuous zero-speed seedling transplanting mechanism for crops according to any one of claims 1 to 8, which is characterized by comprising the following steps:

driving a seedling throwing cup disc (1) filled with seedlings to rotate;

the seedlings fall into the intermittent reversing mechanism (2), and the intermittent reversing mechanism (2) drives the seedlings to reverse and fall into the seedling throwing grabbing and planting mechanism (3);

the seedling throwing grabbing and planting mechanism (3) is used for transplanting seedlings.