CN113303048A

CN113303048A - Precision spreading machine

Info

Publication number: CN113303048A
Application number: CN202110586998.8A
Authority: CN
Inventors: 邓可; 周志
Original assignee: Changsha Sanglaite Agricultural Mechanical Equipment Co Ltd
Current assignee: Changsha Sanglaite Agricultural Mechanical Equipment Co Ltd
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2021-08-27
Anticipated expiration: 2041-05-27
Also published as: CN113303048B

Abstract

The invention discloses a precision spreading machine, which comprises a tractor body, a rack and a controller, wherein the rack is detachably connected to the tail part of the tractor body through a suspension part, a spreading mechanism for spreading organic fertilizer to cultivated land and crops is arranged on the rack, the controller controls the spreading mechanism to spread the organic fertilizer to the cultivated land in unit area in real time, a rotary cultivator is detachably connected to the tail end of the rack, a gearbox for transmitting the power of the tractor body to the spreading mechanism and the rotary cultivator after speed reduction and torque increase is arranged on the rack, and a sensor for detecting the height of the spreading mechanism from the ground is arranged on the suspension part. The invention carries out rotary tillage operation when spreading lime or organic fertilizer, greatly improves the working efficiency and saves the purchasing cost of agricultural machinery; the discharge structure of the invention adopts a form of a real-time controller and a motor, the spreading amount per mu can be preset on the controller, and the controller can control the rotating speed of the motor in real time according to the set amount, thereby ensuring the spreading accuracy.

Description

Precision spreading machine

Technical Field

The invention relates to the technical field of agricultural machinery, in particular to a precise spreader.

Background

With the progress of human production activities, the heavy metals accumulated in the soil are more and more, so that the quality of agricultural products is more and more poor, the heavy metals are gradually transferred to human bodies through food chains, the harm is generated to the life health of the human bodies, the lime is spread and applied by mechanical operation, the organic fertilizer is supplemented, the soil is ploughed, the active effects on the improvement of acid soil, the cadmium pollution remediation and the rice quality safety are realized, the manual spreading of the lime is mainly adopted at present, the labor intensity is high, the efficiency is low, and the harm to the human bodies is large; some methods also adopt mechanical spreading, the failure rate of the mechanical spreading is high, the dust concentration is high, lime or organic fertilizer is unevenly spread, discharge holes are easily blocked, and the discharge size cannot be precisely controlled.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a precision spreader.

In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a smart volume broadcast application machine, includes tractor main part, rotary cultivator, controller and broadcast application mechanism, the tail at the tractor main part is connected through the flying piece liftable ground to the rotary cultivator, broadcast application mechanism demountable installation is used for broadcasting the fertilizer to arable land and crops in the frame of rotary cultivator, controller real time control broadcasts application mechanism and broadcasts application organic fertilizer volume's size to unit area's arable land, install in the frame and be used for transmitting the power of tractor main part for the gearbox of broadcasting application mechanism and rotary cultivator after the speed reduction increases turns round, install on the flying piece and be used for detecting and broadcast application mechanism apart from ground height and transmit the sensor for the controller with the signal that detects.

As a further improvement of the above technical solution:

spread mechanism including the storage case that is used for storing lime or fertilizer, the discharge gate has been seted up to storage bottom of the case portion, the row's of being used for spreading fertilizer or lime material structure is installed to the discharge gate bottom, arrange the row's of material structure volume and pass through controller automatic control.

The storage box is made of corrosion-resistant materials, and the bottoms of the front wall and the rear wall of the storage box are arranged in an inwards inclined mode to form the discharge hole.

Arrange the material structure including installing the row's material box in the discharge gate bottom, row's material box and discharge gate intercommunication, it spreads the mouth of executing to have seted up on the row's material box, it has installed a plurality of fertilizer that are used for getting into the discharge gate side by side to spread the ejection of compact auger that the mouth was executed to the department along tractor main part direction in row's material box, ejection of compact auger rotates to be connected in row's material box, arrange the material box outside and install a power spare that is used for providing power for the material auger, power spare is connected with ejection of compact auger respectively through first transmission spare.

The power part is a variable speed motor and is electrically connected with the controller.

First transmission piece includes first sprocket, second sprocket, first chain, axis of rotation, first bevel gear and second bevel gear, first sprocket and power spare fixed connection, second sprocket fixed connection axis of rotation, first sprocket and second sprocket are connected through first chain drive, the axis of rotation is rotated and is connected in the storage bottom of the case portion, first bevel gear fixed connection is in the axis of rotation, second bevel gear is fixed connection ejection of compact auger respectively, first bevel gear and second bevel gear meshing.

Broadcast application mechanism still including installing and be used for stirring the agitator that avoids the fertilizer to harden in the storage case to the fertilizer, the agitator rotates and installs in the inboard bottom of storage case, the agitator passes through second driving medium and gearbox output shaft.

The spreading mechanism quantity is two, and two spreading mechanism symmetries are installed in the gearbox both sides, two spreading mechanism shares a power piece, two first sprocket on the spreading mechanism is connected through first driving shaft, the power of gearbox output shaft passes through the second driving medium and transmits for two agitators.

The second driving medium includes third sprocket, fourth sprocket, second chain, fifth sprocket, sixth sprocket, third chain, second transmission shaft, seventh sprocket, eighth sprocket and fourth chain, third sprocket fixed connection is on the gearbox output shaft, fourth sprocket and fifth sprocket fixed connection are on one of them agitator, third sprocket and fourth sprocket pass through second chain drive and connect, sixth sprocket fixed connection second transmission shaft, fifth sprocket and sixth sprocket pass through third chain drive and are connected, seventh sprocket fixed mounting is at the other end of second transmission shaft, eighth sprocket fixed mounting is on another distributor's agitator, seventh sprocket and eighth sprocket pass through fourth chain drive and are connected.

And a retaining cover for preventing dust from being generated in the ambient air when organic fertilizer or lime is spread is arranged at the bottom of the frame.

Compared with the prior art, the invention has the advantages that:

1. the invention adopts the compound machinery to spread the organic fertilizer and the lime, can simultaneously carry out rotary tillage operation when spreading the lime or the organic fertilizer and the like, greatly improves the working efficiency, can also independently use one machine to act, and uses two machines to share one power traveling device, thereby greatly improving the utilization rate of agricultural machines and saving the purchase cost of the agricultural machines.

2. The discharge structure of the invention adopts the form of a real-time controller and a motor, so that a user can preset the spreading amount per mu on the controller, and the controller can control the rotating speed of the motor in real time according to the set amount, thereby ensuring the spreading accuracy.

3. The invention has simple structure, low height of the whole machine, low gravity center, good visual field, convenient ridge crossing and large loading capacity, the position of the spreading opening of the invention is low, the concentration of dust generated by spreading materials is small, and the influence on the air environment is small.

4. The spiral auger feeding type discharging device has the advantages that the spiral auger feeding mode is adopted, the discharging efficiency is high, the discharging auger does not contact with the discharging box when in work, and the discharging box is prevented from being abraded.

5. The lime or organic fertilizer stirring and flowing device is provided with the stirrer, lime or organic fertilizer is stirred and flows, and the organic fertilizer in the storage box is prevented from shaking and forming lumps under the action of gravity and not flowing in the walking process of the machine tool.

6. The invention adopts a chain wheel and gear corner transmission structure, and has high transmission efficiency and low failure rate.

Drawings

FIG. 1 is a schematic view in cross-section of one aspect of the present invention;

FIG. 2 is a schematic cross-sectional view of another aspect of the present invention;

FIG. 3 is a schematic structural view of the spreading mechanism of the present invention;

fig. 4 is a schematic view of the first transmission member and the second transmission member of the present invention.

The reference numerals in the figures denote: 1. a tractor body; 2. a rotary cultivator; 3. a controller; 4. a spreading mechanism; 41. a material storage box; 42. a discharge port; 43. a discharge structure; 431. a discharge box; 432. spreading an opening; 433. discharging auger; 434. a power member; 435. a first transmission member; 4351. a first sprocket; 4352. a second sprocket; 4353. a first chain; 4354. a rotating shaft; 4355. a first bevel gear; 4356. a second bevel gear; 4357. a first drive shaft; 44. a stirrer; 5. a suspension member; 6. a frame; 7. a gearbox; 8. a sensor; 9. a second transmission member; 91. a third sprocket; 92. a fourth sprocket; 93. a second chain; 94. a fifth sprocket; 95. a sixth sprocket; 96. a third chain; 97. a second drive shaft; 98. a seventh sprocket; 99. an eighth sprocket; 910. a fourth chain; 10. the cover is held.

Detailed Description

The invention will be described in further detail below with reference to the drawings and specific examples.

As shown in fig. 1 to 4, the precision spreader of the present embodiment includes a tractor body 1, a rotary cultivator 2, a controller 3 and a spreading mechanism 4, the rotary cultivator 2 is connected to the tail of the tractor body 1 through a suspension member 5 in a lifting manner, the spreading mechanism 4 is detachably mounted on a frame 6 of the rotary cultivator 2 for spreading organic fertilizer on cultivated land and crops, the controller 3 controls the spreading mechanism 4 in real time to spread organic fertilizer on the cultivated land in a unit area, a gearbox 7 for transmitting the power of the tractor body 1 to the spreading mechanism 4 and the rotary cultivator 2 after speed reduction and torque increase is installed on the frame 6, and a sensor 8 for detecting the height of the spreading mechanism 4 from the ground and transmitting the detected signal to the controller 3 is installed on the suspension member 5. The tractor main body 1 adopts a conventional structure and is used for providing walking power for the whole tractor, the spreading mechanism 4 and the rotary cultivator 2 are arranged on the tractor main body 1, and the spreading mechanism 4 and the rotary cultivator 2 are combined, so that rotary tillage operation can be carried out while lime or organic fertilizer and the like are spread (rotary tillage operation is carried out after manual spreading or separate machine spreading in the past), the working efficiency of the invention is high, two machines share one walking power device, the utilization rate of the machines is high, the utilization rate of agricultural machines is improved, and the purchase cost of the agricultural machines is saved; the battery pack on the tractor main body 1 provides required electric power for broadcasting mechanism 4, the output shaft of gearbox 7 provides required power for broadcasting mechanism 4 and rotary cultivator 2, frame 6 is as the platform of installation broadcasting mechanism 4 and gearbox 7, rotary cultivator 2 and broadcasting mechanism 4 accessible flying piece 5 carry out altitude mixture control, make the complete machine height low, the focus is low, the field of vision is good, it is convenient to cross the ridge, the load capacity is big and discharge gate position is low, the material broadcasts dust concentration little, little influence to the air environment, the concrete elevating work of flying piece 5 is controlled by the riser of installing on tractor main body 1. The spreading amount of the spreading mechanism 4 is controlled by the controller 3 in real time, the controller 3 determines the running speed of the tractor body 1 through a GPS signal, and simultaneously controls the spreading amount of the spreading mechanism 4, so that the spreading consistency is ensured, the uniformity of spreading is not influenced by the running speed of the tractor body 1 during spreading, the accuracy of the spreading amount is ensured, a user can preset the spreading amount per mu on the controller 3, and the controller 3 can control the spreading amount of the spreading mechanism 4 in real time according to the set amount, so that the spreading accuracy is ensured; contain material level alarm device simultaneously in broadcasting application mechanism 4, the feedback is reported to the police when the material will be broadcast to the greatest extent, sensor 8 and controller 3 electric connection, sensor 8 is used for responding to broadcasting application mechanism 4 and rotary cultivator 2 and leaves the height on ground, when tractor main part 1 stops traveling or sensor 8 responds to broadcasting application mechanism 4 and rotary cultivator 2 highly be higher than the default, give controller 3 with information feedback, controller 3 control broadcasting application mechanism 4 stops broadcasting application fertilizer, when this device normal work, controller 3 control broadcasting application mechanism 4 spreads the application fertilizer.

In this embodiment, the spreading mechanism 4 includes a storage tank 41 for storing lime or organic fertilizer, a discharge hole 42 is provided at the bottom of the storage tank 41, a discharging structure 43 for spreading the organic fertilizer or lime is installed at the bottom end of the discharge hole 42, and the discharging amount of the discharging structure 43 is automatically controlled by the controller 3. Storage tank 41 passes through the bolt fastening on frame 6, and fertilizer or lime in the storage tank 41 pass through discharge gate 42 discharge storage tank 41, spills the application to ploughing through arranging material structure 43 again, and controller 3 controls that row material structure 43 is even spills the application fertilizer to ploughing, installs material level alarm device in the storage tank 41, and the material will spill the feedback when applying to the utmost and report to the police.

In this embodiment, the storage tank 41 is made of corrosion-resistant material, and the bottom of the front and rear walls of the storage tank 41 is inclined inward to form the discharge port 42. The storage box 41 is made of corrosion-resistant materials, so that the storage box 41 is prevented from being corroded by acid fertilizer, and the service life of the device is greatly prolonged; according to the invention, the discharge hole 42 is provided with the blockage alarm system, and when the discharge hole 42 is blocked, the alarm is displayed in real time.

In this embodiment, the discharging structure 43 includes a discharging box 431 installed at the bottom of the discharging port 42, the discharging box 431 is communicated with the discharging port 42, a spreading port 432 is formed in the discharging box 431, a plurality of discharging packing augers 433 used for conveying organic fertilizer entering from the discharging port 42 to the spreading port 432 are installed side by side in the direction of the tractor body 1 in the discharging box 431, the discharging packing augers 433 are rotatably connected in the discharging box 431, a power part 434 used for providing power for the discharging packing augers 433 is installed outside the discharging box 431, and the power part 434 is respectively connected with the discharging packing augers 433 through a first transmission part 435. The spiral auger feeding mode is adopted, the discharging efficiency is high, the discharging auger 433 does not contact with the discharging box 431 when working, and the discharging box 431 is prevented from being abraded; the spreading opening 432 is an open slot perpendicular to the tail of the discharging auger 433, the number of the discharging augers 433 in a single discharging structure 43 is 5, or more discharging augers 433 can be provided, and the plurality of discharging augers 433 simultaneously convey the machine fertilizer or lime to the spreading opening 432 for spreading, so that the spreading efficiency is greatly improved; the spreading port 432 can be adjusted to the lowest position, so that the concentration of dust generated by spreading the organic fertilizer or lime is low, and the influence on the air environment is small.

In this embodiment, the power element 434 is a variable speed motor, and the power element 434 is electrically connected to the controller 3. The form of real-time control ware 3+ motor that discharge system adopted, this controller 3 can confirm the speed of tractor main part 1 operation through the GPS signal, simultaneously according to the feedback of the real-time rotational speed of motor, real-time control motor speed, guarantee the uniformity of broadcasting, can not influence the homogeneity of broadcasting because of the speed of tractor main part 1 operation when guaranteeing to broadcast, guarantee the accuracy of broadcasting the volume, the user can predetermine the volume of broadcasting per mu on controller 3, controller 3 can be according to the rotational speed of the volume real time control motor of settlement, guarantee the accuracy of broadcasting the volume.

In this embodiment, the first transmission element 435 includes a first chain wheel 4351, a second chain wheel 4352, a first chain 4353, a rotating shaft 4354, a first bevel gear 4355 and a second bevel gear 4356, the first chain wheel 4351 is fixedly connected with the power element 434, the second chain wheel 4352 is fixedly connected with the rotating shaft 4354, the first chain wheel 4351 is in transmission connection with the second chain 4352 through the first chain 4353, the rotating shaft 4354 is rotatably connected to the bottom of the material storage box 41, the first bevel gear 4355 is fixedly connected to the rotating shaft 4354, the second bevel gear 4356 is respectively and fixedly connected with the discharging auger 433, and the first bevel gear 4355 is engaged with the second bevel gear 4356. The power of the discharging auger 433 is provided by a motor, is transmitted to a rotating shaft 4354 after being decelerated and torque-increased by a first chain wheel 4351, a second chain wheel 4352 and a first chain 4353, and is transmitted to each discharging auger 433 by a first bevel gear 4355 and a second bevel gear 4356 respectively.

In this embodiment, broadcasting mechanism 4 is still including setting up and being used for stirring the agitator 44 that avoids the fertilizer to harden in storage tank 41 to the fertilizer, and agitator 44 rotates and installs in the inboard bottom of storage tank 41, and agitator 44 is connected with 7 output shaft of gearbox through second driving medium 9. The agitator 44 stirs lime or fertilizer and flows, prevents that the machines from going the in-process, and the fertilizer in the storage tank 41 receives vibrations and becomes to stick together under the action of gravity and not flow.

In this embodiment, the number of the spreading mechanisms 4 is two, the two spreading mechanisms 4 are symmetrically arranged on two sides of the gear box 7, the two spreading mechanisms 4 share one power member 434, the first chain wheels 4351 of the two spreading mechanisms 4 are connected through a first transmission shaft 4357, and the power of the output shaft of the gear box 7 is transmitted to the two stirrers 44 through a second transmission member 9. Set up two and spread mechanism 4 and spread simultaneously, it increases the twice to spread application efficiency, two spread application mechanism 4 provide power through a power part 434, power part 434 transmits power to one of them first transmission piece 435, two first transmission pieces 435 are connected through first transmission shaft 4357, thereby realize that a power part 434 drives a plurality of ejection of compact auger 433 work, the power of gearbox 7 output shaft passes through second transmission piece 9 and transmits to two agitators 44, drive two agitators 44 and work simultaneously, compare in the tradition and drive a plurality of ejection of compact auger 433 in proper order through the sprocket of a plurality of grades, the invention adopts sprocket + gear corner transmission structure, high transmission efficiency, the fault rate is low.

In this embodiment, the second transmission member 9 includes a third sprocket 91, a fourth sprocket 92, a second chain 93, a fifth sprocket 94, and a sixth sprocket 95, third chain 96, second transmission shaft 97, seventh chain wheel 98, eighth chain wheel 99 and fourth chain 910, third chain wheel 91 is fixedly connected on the output shaft of gearbox 7, fourth chain wheel 92 and fifth chain wheel 94 are fixedly connected on one of stirrers 44, third chain wheel 91 and fourth chain wheel 92 are in transmission connection through second chain 93, sixth chain wheel 95 is fixedly connected with second transmission shaft 97, second transmission shaft 97 is rotatably connected on frame 6, fifth chain wheel 94 and sixth chain wheel 95 are in transmission connection through third chain 96, seventh chain wheel 98 is fixedly mounted at the other end of second transmission shaft 97, eighth chain wheel 99 is fixedly mounted on stirrer 44 of another spreading mechanism 4, and seventh chain wheel 98 and eighth chain wheel 99 are in transmission connection through fourth chain 910.

In this embodiment, a retaining cover 10 for preventing dust from being generated in the ambient air when organic fertilizer or lime is applied is installed at the bottom of the frame 6.

The working principle is as follows: when the tractor works, the tractor PT0 system is started, under the drive of the tractor PT0, the power of the output shaft of the gearbox 7 is shunted by the second transmission piece 9 to drive the stirrer 44 to work, lime or organic fertilizer and the like are prevented from being hardened, the fluidity is increased, then, when the GPS signal on the controller 3 monitors that the tractor body 1 is in a running state through the preset amount of the GPS signal on the controller 3, the controller 3 automatically controls the rotating speed of the motor (in the process, the motor can feed back the rotating speed to the controller 3 in real time), drives the discharging auger 433 to spray out organic fertilizer or lime through the retaining cover 10, and when the controller 3 monitors that the tractor body 1 stops running or monitors that the hanging part 5 lifts the application mechanism 4 to a preset height (a lifting signal of the hanging part 5 is captured by a sensor 8 preset on the hanging part 5 and simultaneously fed back to the controller 3), the controller 3 stops rotating the control motor; the power of PT0 output shaft reaches gearbox 7 and is driven the rotor of rotary cultivator 2 to rotate after increasing the torsion by gearbox 7 again at tractor main part 1 driving in-process, through installing the rotary blade on the rotor with soil crushing, ploughs the fertilizer or the lime of broadcasting simultaneously and applys out to earth depths, prevents to run off.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims

1. A precision spreader is characterized in that: comprises a tractor body (1), a rotary cultivator (2), a controller (3) and a spreading mechanism (4), the rotary cultivator (2) is connected with the tail part of the tractor body (1) in a lifting way through a suspension part (5), the spreading mechanism (4) is detachably arranged on a frame (6) of the rotary cultivator (2) and is used for spreading organic fertilizer on cultivated land and crops, the controller (3) controls the spreading mechanism (4) to spread the organic fertilizer amount on the cultivated land of unit area in real time, the frame (6) is provided with a gear box (7) which is used for transmitting the power of the tractor body (1) to the spreading mechanism (4) and the rotary cultivator (2) after speed reduction and torque increase, and a sensor (8) for detecting the height of the spreading mechanism (4) from the ground and transmitting the detected signal to the controller (3) is arranged on the suspension member (5).

2. The precision spreader of claim 1, wherein: spread mechanism (4) including storage case (41) that are used for storing lime or fertilizer, discharge gate (42) have been seted up to storage case (41) bottom, discharge gate (42) bottom is installed and is used for spreading to spread fertilizer or the row of lime material structure (43), arrange the row's of material structure (43) volume and pass through controller (3) automatic control.

3. The precision spreader of claim 2, wherein: the storage box (41) is made of corrosion-resistant materials, and the bottoms of the front wall and the rear wall of the storage box (41) are arranged in an inward inclined mode to form the discharge hole (42).

4. The precision spreader of claim 3, wherein: arrange material structure (43) including installing row's magazine (431) in discharge gate (42) bottom, row's magazine (431) and discharge gate (42) intercommunication, it gives a poor free charge mouth (432) to have seted up on row's magazine (431), it has a plurality of fertilizer that are used for getting into discharge gate (42) to carry to the ejection of compact auger (433) of giving a poor free charge mouth (432) to have installed side by side along tractor main part (1) direction in row's magazine (431), ejection of compact auger (433) rotate to be connected in row's magazine (431), row's magazine (431) outside is installed and is used for providing a power spare (434) of power for ejection of compact auger (433), power spare (434) are connected with ejection of compact auger (433) respectively through first driving medium (435).

5. The precision spreader of claim 4, wherein: the power part (434) is a variable speed motor, and the power part (434) is electrically connected with the controller (3).

6. The precision spreader of claim 4, wherein: the first transmission piece (435) comprises a first chain wheel (4351), a second chain wheel (4352), a first chain (4353), a rotating shaft (4354), a first bevel gear (4355) and a second bevel gear (4356), the first chain wheel (4351) is fixedly connected with the power piece (434), the second chain wheel (4352) is fixedly connected with the rotating shaft (4354), the first chain wheel (4351) and the second chain wheel (4352) are in transmission connection through the first chain (4353), the rotating shaft (4354) is rotatably connected to the bottom of the storage box (41), the first bevel gear (4355) is fixedly connected to the rotating shaft (4354), the second bevel gear (4356) is respectively and fixedly connected with the discharging auger (433), and the first bevel gear (4355) is meshed with the second bevel gear (4356).

7. The precision spreader of claim 6, wherein: broadcast application mechanism (4) are still including installing agitator (44) that are used for stirring the fertilizer in storage case (41) and avoid the fertilizer to harden, agitator (44) rotate and install in storage case (41) inboard bottom, agitator (44) are connected with gearbox (7) output shaft through second driving medium (9).

8. The precision spreader of claim 7, wherein: spread application mechanism (4) quantity is two, and two spread application mechanism (4) symmetries are installed in gearbox (7) both sides, two spread application mechanism (4) a power part (434) of sharing, two first sprocket (4351) on spreading application mechanism (4) are connected through first transmission shaft (4357), the power of gearbox (7) output shaft passes through second driving medium (9) and transmits for two agitator (44).

9. The precision spreader of claim 8, wherein: the second transmission part (9) comprises a third chain wheel (91), a fourth chain wheel (92), a second chain (93), a fifth chain wheel (94), a sixth chain wheel (95), a third chain (96), a second transmission shaft (97), a seventh chain wheel (98), an eighth chain wheel (99) and a fourth chain (910), the third chain wheel (91) is fixedly connected to an output shaft of the gearbox (7), the fourth chain wheel (92) and the fifth chain wheel (94) are fixedly connected to one of the stirrers (44), the third chain wheel (91) and the fourth chain wheel (92) are in transmission connection through the second chain (93), the sixth chain wheel (95) is fixedly connected with the second transmission shaft (97), the fifth chain wheel (94) and the sixth chain wheel (95) are in transmission connection through the third chain (96), and the seventh chain wheel (98) is fixedly installed at the other end of the second transmission shaft (97), the eighth chain wheel (99) is fixedly arranged on the stirrer (44) of the other spreading mechanism (4), and the seventh chain wheel (98) is in transmission connection with the eighth chain wheel (99) through a fourth chain (910).

10. The precision spreader of any one of claims 2-9, wherein: and a retaining cover (10) for preventing dust from being generated in the ambient air when organic fertilizer or lime is spread is arranged at the bottom of the frame (6).