阅读说明：本技术 一种微型马铃薯双行排种器 (Miniature potato double-row seed sowing device ) 是由 赖庆辉 李俊宏 徐景媛 于 2019-11-22 设计创作，主要内容包括：本发明公开了一种微型马铃薯双行排种器,属于农业机械技术领域,所述微型马铃薯双行排种器包括种箱、分种器、排种管、排种升降台,种箱内设置隔板将种箱内部空间分隔为两个存种仓,存种仓底部分别设置有落种口,落种口上分别交接安装隔种板,排种升降台安装在种箱下侧,可相对种箱上下运动,排种升降台两侧分别设置有排种管,排种升降台顶部设置有用于将落种口落下种粒分配至排种管的分种器。本发明通过升降台的上升下落进行充种,通过微型薯自身物理特性进行排种的播种方式,以较好地解决微型薯排种器楼播率高、重播率高、单个排种器只能单行播种、伤种率高和种箱种子得不到完全利用等技问题,提高微型薯排种器的综合性能。(The invention discloses a miniature potato double-row seed sowing device, which belongs to the technical field of agricultural machinery and comprises a seed box, a seed separating device, seed sowing pipes and a seed sowing lifting platform, wherein a partition plate is arranged in the seed box to divide the internal space of the seed box into two seed storage bins, seed falling ports are respectively arranged at the bottoms of the seed storage bins, the seed falling ports are respectively connected and installed with the partition plate, the seed sowing lifting platform is arranged at the lower side of the seed box and can move up and down relative to the seed box, the seed sowing pipes are respectively arranged at two sides of the seed sowing lifting platform, and the top of the seed sowing lifting platform is provided with the seed separating device used for distributing the falling seeds of the seed falling ports to the. The miniature potato seed sowing device can be used for filling seeds by ascending and descending the lifting platform and carrying out seed sowing by the physical characteristics of the miniature potatoes, so that the technical problems that the miniature potato seed sowing device is high in seed sowing rate and reseeding rate, a single seed sowing device can only sow seeds in a single row, the seed damage rate is high, seeds in a seed box cannot be completely utilized and the like are well solved, and the comprehensive performance of the miniature potato seed sowing device is improved.)

1. A miniature potato double-row seed metering device is characterized in that: the seed box comprises a seed box (1), a seed separating device (4), seed discharging pipes (5) and a seed discharging lifting platform (8), wherein a partition plate (18) is arranged in the seed box (1) to divide the inner space of the seed box (1) into two seed storage bins, seed falling ports (13) are respectively arranged at the bottoms of the seed storage bins, the seed falling ports (13) are respectively hinged with the seed separating plate (2), the seed discharging lifting platform (8) is arranged at the lower side of the seed box (1) and can move up and down relative to the seed box (1), the two sides of the seed discharging lifting platform (8) are respectively provided with the seed discharging pipes (5), and the top of the seed discharging lifting platform (8) is provided with the seed separating device (4) which is used for distributing the seed falling ports (.

2. The micro-potato double-row seed meter of claim 1, wherein: the seed separator (4) comprises seed slide ways (41) arranged on two sides, the top of each seed slide way (41) corresponds to the seed dropping opening (13), and the outlet end of the bottom of each seed slide way (41) corresponds to the inlet of the seed discharging pipe (5).

3. The micro-potato double-row seed metering device of claim 1 or 2, characterized in that: the seed sowing device is characterized by further comprising a seed sowing shaft (12) which is vertically arranged on the lower side of the seed sowing lifting table (8), the seed sowing shaft (12) is driven to rotate by a land wheel shaft of the seeder, a slide rod connecting piece (9) is arranged on the seed sowing shaft (12), four smooth curved surfaces (81) are equally arranged at the bottom of the seed sowing lifting table (8), curve slideways (82) are arranged on the edges of the four curved surfaces (81), four slide rods (10) are arranged at intervals of 90 degrees around the slide rod connecting piece (9), sliding plates (11) are arranged on the outer end portions of the slide rods (10), and the top sides of the sliding plates (11); the seed separator (4) also comprises a seed separator cover plate (44), and four seed slideways (41) are arranged around the seed separator cover plate (44) at intervals of 90 degrees; the top end of the seed shaft (12) penetrates through the center of the seed lifting table (8) and extends to the top, the upper end of the seed shaft (12) is a flat end (15) with two cut sides, a through hole with a matched shape is arranged in the middle of the rotary connecting piece (16), the bottom of the seed distributor (4) is connected with the seed shaft (12) through the rotary connecting piece (16), and the seed distributor (4) is driven by the seed shaft (12) to rotate relative to the seed lifting table (8).

4. The micro-potato double-row seed meter of claim 3, wherein: the flat end (15) penetrates through a through hole in the middle of the rotary connecting piece (16) and extends to the lower side of the seed distributor cover plate (44), a spring cover plate (6) is installed on the top end of the flat end (15), and a compression spring (7) is sleeved on the seed distributing shaft (12) between the spring cover plate (6) and the rotary connecting piece (16).

5. The micro-potato double-row seed meter of claim 4, wherein: a buffering slide way (42) is arranged at the outlet end of the seed slide way (41), a gap is reserved between the seed slide way (41) and the buffering slide way (42), and the seed slide way (41) and the buffering slide way (42) are connected into a whole through a slide way connecting piece (43); two arc-shaped separation blades (82) are symmetrically arranged on the top surface of the seed metering lifting platform (8), the separation blades (82) penetrate into a gap between the seed slide way (41) and the buffer slide way (42) and are higher than the two side guard plates of the seed slide way (41), two seed falling gaps with opposite positions are reserved between the two arc-shaped separation blades (82), and the opening positions of the seed falling gaps are positioned on the upstream side of the seed metering pipe (5) relative to the rotation direction of the seed metering device (4).

6. The micro potato double row seed meter of claim 1 or 5, wherein: the top surface of the seed metering lifting table (8) is provided with a circular sinking groove, the tops of four corners of the edge of the groove are connected with the bottom of the seed box (1) in a sliding way through lifting columns (3), and the seed distributing device (4) is arranged on the bottom surface of the groove.

7. The micro-potato double-row seed meter of claim 1, wherein: the inner side of the seed discharging pipe (5) is provided with a T-shaped slide rail (51), the side wall of the seed discharging lifting platform (8) is provided with a matched T-shaped sliding chute (83), and the seed discharging lifting platform (8) is matched with the T-shaped slide rail (51) of the seed discharging pipe (5) through the T-shaped sliding chute (83) to realize sliding connection.

8. The micro-potato double-row seed meter of claim 1, wherein: a seed box mounting block (14) is arranged on the side wall of the seed box (1), and the seed box (1) is mounted on the seeder frame through the seed box mounting block (14).

9. The micro-potato double-row seed meter of claim 1, wherein: both sides of the bottom of the seed box (1) are provided with guide plates which are obliquely arranged, and the bottom ends of the guide plates are opposite to the seed dropping opening (13).

10. The miniature potato double-row seed sowing device according to patent claim 1, characterized in that: the bottom of the seed box (1) is provided with an arc-shaped seed baffle plate (18) on the opening side of the corresponding seed baffle plate (2), and the circle center of the arc-shaped seed baffle plate (18) is concentric with the hinged position of the seed baffle plate (2).

Technical Field

The invention relates to the field of agricultural machinery, in particular to a miniature potato double-row seed sowing device.

Background

With the rapid development of the domestic agricultural mechanical sowing technology, potatoes are used as one of domestic important economic crops, a large amount of planting area exists, and huge cultivation area exists in both greenhouse planting and field planting, so that the precision sowing requirement on the potatoes is higher and higher.

At present, the domestic miniature potato seed sowing device has the following problems:

1) based on the agricultural requirements of the miniature potatoes, the ridge spacing is 800mm, the small row spacing is 150mm, the conventional miniature potato seed sowing device which needs to sow double rows in one ridge can only sow single rows and does not have the function of double row sowing;

2) the conventional miniature potato seed sowing device mainly comprises a spoon chain type seed sowing device, seed cleaning is mainly carried out by matching the self gravity of seeds with inherent vibration of a machine, but the sphericity of the miniature potato seeds is generally higher, the longitudinal vibration and the transverse vibration can cause the seeds to fly out of seed scoops, so that the phenomenon of miss-seeding is caused, the seeding cannot be supplemented by self, the seeding can be supplemented only by manpower, and meanwhile, the miniature potato seed sowing device also has the problem of high reseeding rate;

3) when the conventional miniature potato seed sowing device is used for sowing seeds, the distance between the two seed scoops is large, the seed scoops are not fixed on the link through the screwing of the convex parts and the screws, and the type potatoes can directly fall on the convex parts on the next seed sowing scoop when the seeds are sowed, so that the seeds are damaged, and the seed injury rate is improved;

4) the seed filling area of the spoon-chain type miniature potato seed sowing device is provided with a rubber soft plate which is used for preventing seeds from falling out of the seed box and has a certain seed cleaning effect, but the seeds to be filled in the seed filling area are pushed to two sides of the seed box, due to the design of the seed box, the seeds pushed to two sides can generate accumulation, the accumulated seeds can not return to the seed filling area again by self gravity, the waste of at least more than dozens of single-row seeds in one working stroke is caused, and the current domestic miniature potato seed sowing machine does not adopt any measures to improve the unreasonable structure of the seed box, so the unnecessary waste is caused;

5) the potato seeding apparatus adopting the pneumatic seeding has the advantages that the weight and the size of each seed are different, the phenomena of seeding missing and reseeding are easily caused under the condition of certain wind pressure, the manufacturing cost is high, and the potato seeding apparatus is only suitable for large-scale agricultural machines in large farms.

Disclosure of Invention

Aiming at the problems in the background technology, the invention provides a micro potato double-row seed sowing device, which adopts a sowing mode of seed sowing through the ascending and descending of a lifting platform and the self physical characteristics of micro potatoes, so as to better solve the technical problems of high sowing rate and reseeding rate of a micro potato seed sowing device, single-row sowing of a single seed sowing device, high seed damage rate, incomplete utilization of seed seeds of a seed box and the like, and improve the comprehensive performance of the micro potato seed sowing device.

In order to achieve the purpose, the invention adopts the following technical scheme: miniature potato double-row seed metering ware includes seed case, seed divider, seed metering pipe, seed metering elevating platform, and the internal baffle that sets up of seed case separates seed case inner space for two seed storage bins, and seed storage bin bottom is provided with the kind of a mouth that falls respectively, and the installation baffle that hands over respectively on the kind of a mouth that falls, seed metering elevating platform install seed case downside, but relative seed case up-and-down motion, seed metering elevating platform both sides are provided with the seed metering pipe respectively, and seed metering elevating platform top is provided with the seed divider that is used for falling the kind of a mouth that falls and distributes to seed metering pipe.

Preferably, the seed separator comprises seed slide ways arranged on two sides, the top of each seed slide way corresponds to the seed falling port, and the outlet end of the bottom of each seed slide way corresponds to the inlet of the seed discharging pipe.

Preferably, the seed sowing device further comprises a seed sowing shaft, the seed sowing shaft is vertically arranged on the lower side of the seed sowing lifting platform and driven to rotate by a land wheel shaft of the seeder, a slide bar connecting piece is arranged on the seed sowing shaft, the bottom of the seed sowing lifting platform is equally provided with four smooth curved surfaces, the edges of the four curved surfaces are provided with curve slideways, four slide bars are arranged around the slide bar connecting piece at intervals of 90 degrees, the outer end parts of the slide bars are provided with slide plates, and the top sides of the slide plates are clamped in; the seed separator also comprises a seed separator cover plate, and four seed slideways are arranged around the seed separator cover plate at intervals of 90 degrees; the top end of the seed shaft penetrates through the center of the seed lifting table to extend to the top, the upper end of the seed shaft is a flat end with two cut sides, a through hole with a matched shape is arranged in the middle of the rotary connecting piece, the bottom of the seed divider is connected with the seed shaft through the rotary connecting piece, and the seed divider is driven by the seed shaft to rotate relative to the seed lifting table.

Preferably, the flat end passes through a through hole in the middle of the rotary connecting piece and extends to the lower side of the seed separating device cover plate, a spring cover plate is installed on the top end of the flat end, and a compression spring is sleeved on the seed sowing shaft between the spring cover plate and the rotary connecting piece.

Preferably, the outlet end of the seed slideway is provided with a buffer slideway, a gap is reserved between the seed slideway and the buffer slideway, and the seed slideway and the buffer slideway are connected into a whole through a slideway connecting piece; two arc-shaped separation blades are symmetrically arranged on the top surface of the seed metering lifting platform, the separation blades penetrate into a gap between the seed slide way and the buffering slide way and are higher than guard plates on two sides of the seed slide way, two seed falling gaps with opposite positions are reserved between the two arc-shaped separation blades, and the opening positions of the seed falling gaps are located on the upstream side of the seed metering pipe relative to the rotation direction of the seed metering device.

Preferably, the top surface of the seed metering lifting table is provided with a circular sinking groove, the tops of four corners of the edge of the groove are in sliding connection with the bottom of the seed box through lifting columns, and the seed distributor is arranged on the bottom surface of the groove.

Preferably, the inner side of the seed discharging pipe is provided with a T-shaped slide rail, the side wall of the seed discharging lifting platform is provided with a matched T-shaped sliding chute, and the seed discharging lifting platform is matched with the T-shaped slide rail of the seed discharging pipe through the T-shaped sliding chute to realize sliding connection.

Preferably, a seed box mounting block is arranged on the side wall of the seed box, and the seed box is mounted on the seeder frame through the seed box mounting block.

Preferably, guide plates are obliquely arranged on two sides of the bottom of the seed box, and the bottom ends of the guide plates are opposite to the seed dropping port.

Preferably, the bottom of the seed box is provided with an arc-shaped seed baffle on the side corresponding to the opening of the seed baffle, and the circle center of the arc-shaped seed baffle is concentric with the hinged position of the seed baffle.

The invention has the beneficial effects that:

the miniature potato seed sowing device can be used for filling seeds by ascending and descending the lifting platform and carrying out seed sowing by the physical characteristics of the miniature potatoes, so that the technical problems that the miniature potato seed sowing device is high in seed sowing rate and reseeding rate, a single seed sowing device can only sow seeds in a single row, the seed damage rate is high, seeds in a seed box cannot be completely utilized and the like are well solved, and the comprehensive performance of the miniature potato seed sowing device is improved.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic view of the combination of the seed divider and the seed metering lifting table of the present invention;

FIG. 4 is a schematic view of the combination of a seed shaft and a seed lift platform of the present invention;

FIG. 5 is a cross-sectional view of FIG. 3;

FIG. 6 is a perspective view of a seed metering lift table of the present invention;

FIG. 7 is a perspective view of a seed tube of the present invention;

FIG. 8 is a perspective view of a seed shaft of the present invention;

FIG. 9 is a schematic view of the flat end of the present invention mated to a rotating connector;

FIG. 10 is a perspective view of a spacer plate of the present invention;

FIG. 11 is a partial cross-sectional view of a seed tank of the present invention;

the reference numbers in the figures are: 1-seed box, 2-seed separating plate, 3-lifting column, 4-seed separator, 41-seed slide way, 42-buffer slide way, 43-slide way connecting piece, 44-seed separator cover plate, 5-seed discharging tube, 6-spring cover plate, 7-compression spring, 8-seed discharging lifting table, 81-curved surface, 82-baffle plate, 83-T type chute, 9-slide rod connecting piece, 10-slide rod, 11-slide plate, 12-seed discharging shaft, 13-seed discharging port, 14-seed box mounting block, 15-flat end, 16-rotary connecting piece, 17-rotary connecting shaft and 18-arc-shaped seed separating plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to facilitate understanding of the skilled person.

As shown in figures 1 to 11, the miniature potato double-row seed sowing device comprises a seed box 1, a seed dividing device 4, a seed sowing pipe 5 and a seed sowing lifting platform 8, wherein a seed box mounting block 14 is arranged on the side wall of the seed box 1, the seed box 1 is mounted on a seeder frame through the seed box mounting block 14, a partition plate 18 is arranged in the seed box 1 to divide the internal space of the seed box 1 into two seed storage bins, seed falling ports 13 are respectively arranged at the bottoms of the seed storage bins, guide plates which are obliquely arranged are respectively arranged at two sides of the bottom of the seed box 1, the bottom ends of the guide plates are opposite to the seed falling ports 13, the seed dividing plates 2 are respectively hinged and mounted on the seed falling ports 13, the seed sowing lifting platform 8 is mounted at the lower side of the seed box 1, a circular sinking groove is arranged on the top surface of the seed sowing lifting platform 8, the four corners of the edge of the groove are slidably, downwards, the seed separating plate 2 is opened to drop seeds due to self weight and seed weight, two sides of a seed discharging lifting platform 8 are respectively provided with a seed discharging pipe 5, the inner side of the seed discharging pipe 5 is provided with a T-shaped slide rail 51, the side wall of the seed discharging lifting platform 8 is provided with a matched T-shaped slide groove 83, the seed discharging lifting platform 8 is matched with the T-shaped slide rail 51 of the seed discharging pipe 5 through the T-shaped slide groove 83 to realize sliding connection, the top of the seed discharging lifting platform 8 is provided with a seed distributing device 4 used for distributing the dropped seeds of the seed dropping opening 13 to the seed discharging pipe 5, and the seed distributing device 4 is arranged on the bottom. The seed separator 4 comprises seed slide rails 41 arranged on two sides, the top of each seed slide rail 41 corresponds to the seed dropping opening 13, the outlet end of the bottom of each seed slide rail 41 corresponds to the inlet of the seed discharging pipe 5, and the seed slide rails 41 can guide seeds to slide into the seed discharging pipes 5, so that the seed dropping stability is guaranteed, and the phenomenon of seed missing is reduced.

The invention also comprises a seed shaft 12, the seed shaft 12 is vertically arranged at the lower side of the seed lifting platform 8 and is driven to rotate by a ground wheel shaft of the seeder through gear transmission, a slide rod connecting piece 9 is arranged on the seed shaft 12, four smooth curved surfaces 81 are equally arranged at the bottom of the seed lifting platform 8, curved slide ways 82 are arranged on the edges of the four curved surfaces 81, four slide rods 10 are arranged at intervals of 90 degrees around the slide rod connecting piece 9, slide plates 11 are arranged on the outer end parts of the slide rods 10, the top sides of the slide plates 11 are clamped in the curved slide ways 82, the slide rods 10 and the slide plates 11 rotate along the curved slide ways 82 under the rotation drive of the seed shaft 12, so that the seed lifting platform 8 is driven to periodically ascend and descend, in the example, the distance from the top of the curved surfaces 81 to the lower surface of the. The seed separator 4 further comprises a seed separator cover plate 44, four seed slide ways 41 are arranged on the periphery of the seed separator cover plate 44 at intervals of 90 degrees, the top end of a seed discharging shaft 12 penetrates through the center of a seed discharging lifting platform 8 and extends to the top, the upper end of the seed discharging shaft 12 is a flat end 15 with two cut sides, a through hole with a matched shape is arranged in the middle of a rotary connecting piece 16, the bottom of the seed separator 4 is connected with the seed discharging shaft 12 through the rotary connecting piece 16, the seed separator 4 is driven by the seed discharging shaft 12 to rotate relative to the seed discharging lifting platform 8 and ascend and descend along with the seed discharging lifting platform 8 to carry out opening and closing matching inoculation and seed guiding work of the seed separator 2, the curved surfaces 81 and the seed slide ways 41 are four, after the seed discharging shaft 12 rotates for one circle, the seed separator 4 can divide the seed to the seed discharging pipes 5 on two sides twice. The flat end 15 passes through a through hole in the middle of the rotary connecting piece 16 and extends to the lower side of the seed distributor cover plate 44, a spring cover plate 6 is arranged on the top end of the flat end 15, and a compression spring 7 is sleeved on the seed distributing shaft 12 between the spring cover plate 6 and the rotary connecting piece 16. When the seed metering lifting platform 8 is driven by the seed metering shaft 12 to rise from the lowest point to the highest point, the rotary connecting piece 16 can rise relative to the flat end 15 and compress the compression spring 7, and when the seed metering lifting platform 8 falls back from the high point to the low point, the seed metering lifting platform 8 falls back under the action of the restoring force of the compression spring 7, so that the situation that the seed metering lifting platform 8 is blocked and cannot fall back is reduced, the seed falling stability is further improved, and the miss-seeding phenomenon is reduced.

A buffer slideway 42 is arranged at the outlet end of the seed slideway 41, a gap is reserved between the seed slideway 41 and the buffer slideway 42, and the seed slideway 41 and the buffer slideway 42 are connected into a whole through a slideway connecting piece 43; two arc-shaped blocking pieces 82 are symmetrically arranged on the top surface of the seed metering lifting platform 8, the blocking pieces 82 penetrate into the gap between the seed slide way 41 and the buffering slide way 42 and are higher than the guard plates on the two sides of the seed slide way 41, two seed falling gaps with opposite positions are reserved between the two arc-shaped blocking pieces 82, and the opening positions of the seed falling gaps are positioned on the upstream side of the seed metering pipe 5 relative to the rotation direction of the seed metering device 4. The separation blade 82 can stop seeds when falling into the seed slide way 41, avoid the direct impact of seeds on the top surface edge of the seed metering lifting platform 8, and when the seed slide way 41 and the buffer slide way 42 rotate to a seed dropping gap position between the two arc-shaped separation blades 82, the seeds can be dropped on the seed slide way 41 and filled into the buffer slide way 42, and then the seeds are conveyed to the seed metering pipes 5 on two sides by the buffer slide way 42 to be dropped, so that the serious phenomenon of seed damage is greatly reduced, wherein the inclination angle of the seed slide way 41 is preferably 45 degrees, the inclination angle of the buffer slide way 42 is preferably 20 degrees, the seed dropping efficiency of the seeds is ensured, and the condition of seed damage is reduced. In addition, the width of the seed slide way 41 and the width of the buffering slide way 42 are the size which can allow the seeds to pass through transversely but can not pass through two seeds simultaneously, and are determined according to the seeds to be sowed, in the example, the maximum size of three-axis sizes of the miniature potato seeds is about 30mm, and the minimum size of three-axis sizes is about 17mm, so that the width of the seed slide way 41 and the width of the buffering slide way 42 are set to be about 30mm, and the rebroadcasting phenomenon during sowing can be reduced.

The bottom of the seed box 1 is provided with an arc-shaped baffle plate 18 on the opening side corresponding to the baffle plate 2, the circle center of the arc-shaped baffle plate 18 is concentric with the hinged position of the baffle plate 2, in the embodiment, the arc-shaped baffle plate 18 is designed according to seeds with the maximum size of about 30mm in three-axis sizes, the arc length of the arc-shaped baffle plate 18 is 4mm, the corresponding radian angle is 6.8 degrees, and the arc radius is 34mm, so that after the baffle plate 2 is opened, the area between the baffle plate 2 and the arc-shaped baffle plate 18 can be filled with two to three seeds at most, and the gap between the end part of the baffle plate 2 and the bottom end of the arc-shaped baffle plate 18 is about 30mm, when seeds fall, only one seed can be ensured to fall through falling, the seed slide way, and the arc-shaped baffle plate 18 is integrally arc-shaped, when the first seed begins to fall, the baffle plate 2 is gradually recovered upwards, the second seed can be effectively separated, meanwhile, the arc-shaped seed baffle plate 18 can guide the falling seeds, so that the seeds can accurately fall into the seed slide way 41, and the stability of the seed falling process is guaranteed.

The working process of the invention is as follows:

firstly, seeds are filled into the two seed storage bins of the seed box 1, the seed discharging lifting platform 8 is at the lowest position at the position shown in figure 1, at the moment, the seed separating plate 2 is opened due to the self weight and the seed pressure, the seeds fall onto the seed slide rails 41 at the two sides of the seed separating device 4 corresponding to the opening positions of the two seed falling holes 13 from the seed falling holes 13 at the bottom of the seed box 1 and are blocked in the seed slide rails 41 by the blocking plates 82, and the seed separating device 4 is driven to rotate anticlockwise along with the rotation of the seed discharging shaft 12. When the rotation angle of the seed shaft 12 is in the range of 0-45 degrees, the sliding plate 11 and the sliding rod 10 slide along the curved surface 81 and the curved slideway 82 below the seed lifting table 8, the seed lifting table 8 starts to move upwards, the seed separating plate 2 is gradually closed under the pushing of the seed separating device 4, the seeds on the upper side of the seed separating plate return to the seed box 1, meanwhile, when the seed slideway 41 and the buffer slideway 42 rotate to a seed falling gap, no baffle 82 is arranged at the moment, the seed separating plate 2 is closed, the seeds fall to the bottom along the buffer slideway 42, and the first seed filling is completed.

When the rotation range of the seed shaft 12 is in the range of 45 degrees to 90 degrees, the seed filling for the second time occurs, when the rotation range is in the 90 degrees position, the seed separating plate 2 falls down the seed box 1 to be opened, the seeds slide into the other two seed slide ways 41 which are not fallen before of the seed separating plate 4, and at the moment, the two seed slide ways 41 and the two buffer slide ways 42 are filled with the seeds.

When the rotation range of the seeding shaft 12 is in the range of 90 degrees to 135 degrees, the seeds falling for the second time continue to gradually rotate to the seed falling gap along with the seed slide rail 41, then slide into the buffer slide rail 42 at the lower side of the seed falling gap and gradually fall to the bottom, and at the moment, the four buffer slide rails 42 are filled with the seeds.

When the rotation range of the seeding shaft 12 is in the range of 135-180 degrees, the two buffering slideways 42 for the first seed filling rotate 180 degrees relatively, when the bottoms of the moving buffering slideways 42 are aligned with the positions of the seeding pipes 5, seeds on the moving buffering slideways fall into the seeding pipes 5 to finish the first seed filling of the seeding pipes 5 on two sides, because the seeding lifting platform 8 returns to the lowest point at the moment, the upper seed separating plate 2 is opened to perform the second seed filling, and the processes are repeated to perform the seed filling and seed filling work. Namely, in the process that the seeding shaft 12 rotates for a circle, namely, rotates from 0 degree to 360 degrees, each seeding pipe 5 can complete twice seed falling, and the seeding efficiency is high.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.