WO2020221112A1 - 一种气吸式大蒜定向排种装置 - Google Patents

一种气吸式大蒜定向排种装置 Download PDF

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Publication number
WO2020221112A1
WO2020221112A1 PCT/CN2020/086530 CN2020086530W WO2020221112A1 WO 2020221112 A1 WO2020221112 A1 WO 2020221112A1 CN 2020086530 W CN2020086530 W CN 2020086530W WO 2020221112 A1 WO2020221112 A1 WO 2020221112A1
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Prior art keywords
seed
suction
seed suction
orientation
chamber shell
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PCT/CN2020/086530
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English (en)
French (fr)
Inventor
宋井玲
许鹏飞
徐洪岑
蔡善儒
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山东理工大学
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Priority to KR1020207031220A priority Critical patent/KR102542069B1/ko
Publication of WO2020221112A1 publication Critical patent/WO2020221112A1/zh

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C9/00—Potato planters
    • A01C9/08—Potato planters with other distributing devices, e.g. flaps, screws, horizontal turning plates
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V20/00—Scenes; Scene-specific elements
    • G06V20/10—Terrestrial scenes

Definitions

  • the invention relates to the technical field of agricultural machinery, in particular to an air suction type garlic directional seeding device.
  • domestic and foreign garlic planting mechanical seeding devices mainly include mechanical and air-suction type. Its main function is to realize single-seed seeding. Very few can achieve single-seed directional seeding. Air-suction garlic directional seeding device almost none.
  • the existing mechanized garlic seed orientation technology only works on garlic varieties with relatively regular shapes, lower center of gravity, and longer tooth tips, and the garlic seed orientation effect on general varieties with a large amount of planting does not meet the actual application requirements. .
  • the technical problem to be solved by the present invention is to overcome the shortcomings of the prior art, adopt garlic seed tooth tip image recognition and control technology, and provide an air suction garlic directional seeding device that is used in a garlic planting machine and has strong adaptability to garlic varieties , In order to improve the upright rate of the garlic planter, ensure the quality of seeding, which is beneficial to the high yield of garlic.
  • the present invention provides the following technical solutions:
  • An air suction type garlic directional seeding device comprising a seed chamber shell, a seed suction chamber shell, a seed suction plate, a sealing ring, a directional shrapnel, an inner directional needle, an outer directional needle, an image collector, a rotating orienting device, and an image Identify the control unit, the transmission shaft and the transmission sprocket, the seed chamber shell and the seed suction chamber shell are fixedly connected, the seed suction disk is arranged between the seed chamber shell and the seed suction chamber shell, in the suction disk and the seed suction chamber A sealing ring is arranged between the shells, the sealing ring, the seed suction plate, and the seed suction chamber shell enclose the seed suction chamber.
  • the seed suction chamber shell is provided with a suction tube which communicates with the seed suction chamber, and the suction disk and the seed chamber shell
  • the body encloses the seed chamber, the upper end of the seed chamber shell is open, and the seed suction disc is evenly arranged with multiple circular through holes along the circumference.
  • Each circular through hole is provided with a combined suction block, and the combined suction block is in clearance fit with the circular through hole ,
  • the center of the combined suction block is provided with a seed suction through hole, corresponding to the oblique upper part of the seed suction plate, the directional spring, inner directional needle, outer directional needle, image collector and rotating directional device are arranged counterclockwise along the center circle of each suction through hole.
  • Orientation shrapnel, inner orientation needle, outer orientation needle, image collector fixed on the seed chamber shell, rotation orientation device on the other side of the seed suction plate and fixed on the seed chamber shell, orientation shrapnel, image collector
  • the center of the rotating orienting device corresponds to the center circle of the seed suction through hole.
  • the inner and outer needles are respectively located inside and outside the center circle of the seed through hole.
  • One end of the drive shaft is fixedly connected to the center of the seed disk, and the other end is connected to the drive chain.
  • the wheels are fixedly connected, and the middle is supported on the seed suction chamber shell via a bearing.
  • the combined suction block is composed of a toggle movable piece and a seed sucking piece.
  • the toggle movable piece and the sucking piece are fixedly connected by screws, and the toggle movable piece and the seed sucking piece are arranged on the side of the cylinder in contact with the seed sucker.
  • the diameter of the step gradually increases from the middle to the two sides.
  • Two grooves are symmetrically provided on the surface of the moving block on one side of the seed suction chamber.
  • the bottom plane of the groove is parallel to the surface of the moving block and is parallel to the concave surface.
  • One side of the groove is perpendicular to the radial surface, and the included angle with the other side of the radial surface is 100-130°.
  • the rotation orienting device includes a motor, a rotating arm, a sleeve, a shift lever and a spring.
  • the sleeve, shift lever and spring are arranged in pairs.
  • the motor is located outside the seed suction chamber and fixed on the housing of the seed suction chamber, and the motor shaft passes through The housing of the seed suction chamber extends into the seed suction chamber.
  • the middle of the rotating arm is fixedly connected with the motor shaft along the radial direction of the seed suction disc.
  • the two ends of the rotating arm are respectively fixedly connected to two sleeves vertically, and the lever is a cylindrical shape with a shoulder in the middle.
  • One end of the two shift rods are respectively installed in the two sleeves, the shift rod and the sleeve are in clearance fit, and two springs are respectively housed outside the two sleeves, and the other ends of the two shift rods are in contact with the surface of the movable block.
  • the ends of the two shifting rods contacting the surface of the shifting movable block can respectively extend into the two symmetrical grooves on the surface of the shifting movable block.
  • an air suction type garlic directional seeding device is installed on the garlic planter, the suction pipe is connected to the fan inlet, and the tractor provides power to drive the transmission sprocket to rotate and the fan to work.
  • the garlic planting in the garlic planting box passes through the seed room.
  • the upper end of the casing enters the seed chamber with a proper amount.
  • the fan works through the suction tube to generate negative pressure in the seed suction chamber.
  • the transmission sprocket drives the seed suction plate to rotate counterclockwise, and the seed suction through hole of the combined suction block on the seed suction plate rotates to the seed suction area.
  • the garlic seeds in the seed chamber When the garlic seeds in the seed chamber are adsorbed on the suction through holes under the action of negative pressure, the garlic seeds on the suction through holes will continue to rotate with the suction disc to enter the orientation zone. When it passes the directional shrapnel, the directional shrapnel will stand Pour down the garlic seeds so that the garlic seeds lie flat on the seed suction through holes of the seed sucker. When the suction through holes turn over the inner and outer directional needles, the garlic seeds on the through holes are sucked on the inner and outer needles. Under the constraint of the directional needle, pluck off the excess garlic seeds and leave only one, and make the length of the garlic seeds along the direction of movement with the tooth tips facing forward or backward to achieve the first orientation.
  • the garlic after the first orientation When the seeds are transferred to the image collector position with the seed suction plate, the image collector collects garlic seeds images.
  • the garlic seeds images are judged by the image recognition control unit to determine the direction of the garlic seeds. If the garlic seeds are facing forward, the image recognition control unit Send a signal to the motor.
  • the motor When the combined suction block carrying the garlic seeds moves to the position of the rotation orienting device, the motor is started to rotate 180°, and the combined suction block is rotated by the lever to rotate 180° relative to the suction plate, and the garlic seeds also rotate 180° accordingly. °, make the garlic seeds face backward, complete the second orientation, the garlic seeds that enter the seeding area are all backwards, and discharge upright in the seeding area to complete the directional discharge of single garlic seeds.
  • the air suction type garlic directional seeding device discharges garlic seeds one by one in a directional direction.
  • the directional shrapnel, inner directional needle and outer directional needle of the present invention realize the singulation and first orientation of garlic seeds.
  • the tooth tips are only facing forward and backward In both cases, the image recognition processing is simple, fast and accurate.
  • the orientation of the garlic seeds of the present invention is adjusted in two orientations for multiple times, the secondary rotation orienting mechanism is simple to move, and the discharged garlic seeds have a high consistency rate of tooth tips, which can improve the upright planting rate of the garlic planter.
  • the invention adopts the combination of air suction seed collection and image recognition control technology to realize the single-grain directional seeding of garlic seeds. There are no special requirements on the shape and center of gravity distribution of the garlic seeds. It is suitable for single-grain garlic seeds. Directional seeding.
  • Figure 1 is a schematic structural diagram of an embodiment of the present invention.
  • Fig. 2 is a cross-sectional view taken along the line A-A in Fig. 1.
  • Fig. 3 is a schematic diagram of the structure of the rotation orientation device.
  • Fig. 4 is a B-B sectional view of Fig. 3.
  • a garlic air suction type directional seeding device includes a seed chamber housing 1, a seed suction chamber housing 2, a seed suction plate 3, a sealing ring 4, a directional spring 7, and an inner directional needle 8.
  • External orientation needle 9, image collector 10, rotation orientation device, image recognition control unit, transmission shaft 5 and transmission sprocket 6, seed chamber housing 1 and seed suction chamber housing 2 are fixedly connected, seed suction plate 3 is arranged Between the seed chamber housing 1 and the seed suction chamber housing 2, a sealing ring 4 is arranged between the seed suction disk 3 and the seed suction chamber housing 2, the sealing ring 4, the seed suction disk 3, and the seed suction chamber housing 2
  • the seed suction chamber 11 is enclosed.
  • the seed suction chamber housing 2 is provided with a suction tube 13 which communicates with the seed suction chamber 11.
  • the seed suction tray 3 and the seed chamber housing 1 enclose a seed chamber 12, and the upper end of the seed chamber housing 1 Open, the seed sucker 3 is evenly arranged with a plurality of circular through holes along the circumference, each circular through hole is provided with a combined suction block, the combined suction block is in clearance fit with the circular through hole, and the center of the combined suction block is provided with a suction hole Hole, corresponding to the oblique upper part of the seed sucker 3, the directional spring 7, the inner directional needle 8, the outer directional needle 9, the image collector 10 and the rotation directional device are arranged counterclockwise along the center circle of each suction through hole, the directional spring 7, the inner fixed The directional needle 8, the outer directional needle 9, and the image collector 10 are fixed on the seed chamber housing 1, the rotating orienting device is on the other side of the seed suction plate 3 and fixed on the seed chamber housing 2, the directional elastic
  • the inner orientation needle 8 and the outer orientation needle 9 are respectively located inside and outside the center circle of the seed suction through hole.
  • One end of the drive shaft 5 is fixed to the center of the seed sucker 3
  • the other end is fixedly connected with the transmission sprocket 6, and the middle is supported on the seed suction chamber housing 2 via a bearing.
  • the combined suction block consists of a toggle block 19 and a seed suction block 20.
  • the toggle block 19 and the seed block 20 are fixedly connected by a screw 21.
  • the toggle block 19 and the seed block 20 are connected to the seed block 3
  • the side surface of the cylinder in contact is set in a stepped shape, and the diameter of the step gradually increases from the middle to the two sides.
  • the movable block 19 is symmetrically provided with two radial grooves on one side of the seed suction chamber.
  • the surface of the movable block 19 is parallel, perpendicular to the radial surface on one side of the groove, and has an included angle of 120° with the radial surface on the other side.
  • the rotation orienting device includes a motor 14, a rotating arm 15, two sleeves 16, two levers 18 and two springs 17.
  • the motor is outside the seed suction chamber 11 and is fixed on the housing 2 of the seed suction chamber, and the motor shaft passes through The seed suction chamber housing 2 extends into the seed suction chamber 11.
  • the middle of the rotating arm 15 is fixedly connected to the motor shaft along the radial direction of the seed suction disk 3, and the two ends of the rotating arm 15 are respectively connected to two sleeves 16 vertically, and the lever 18 is A cylindrical shoulder is set in the middle.
  • One ends of the two shift rods 18 are respectively fitted into the two sleeves 16, and the shift rod 18 is in clearance fit with the sleeve 16, and the two sleeves 16 are respectively covered with two springs 17, two
  • the other end of the shift lever 18 is in contact with the surface of the toggle block 19.

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Abstract

一种大蒜气吸式定向排种装置，包括种子室壳体（1）、吸种室壳体（2）、吸种盘（3）、密封圈（4）、定向弹片（7）、内定向针（8）、外定向针（9）、图像采集器（10）、旋转定向装置、图像识别控制单元、传动轴（5）和传动链轮（6），种子室壳体（1）和吸种室壳体（2）固定连接，吸种盘（3）布置在种子室壳体（1）和吸种室壳体（2）之间，在吸种盘（3）和吸种室壳体（2）之间设置密封圈（4），吸种室壳体（2）上设有吸管（13），吸种盘（3）沿圆周均匀布置多个吸种通孔，在吸种盘（3）的定向区沿各吸种通孔中心圆逆时针依次布置定向弹片（7）、内定向针（8）、外定向针（9）、图像采集器（10）和旋转定向装置，传动轴（5）一端和吸种盘（3）中心固定连接，另一端和传动链轮（6）固定连接，中间经轴承支撑在吸种室壳体（2）上。

Description

一种气吸式大蒜定向排种装置 技术领域
本发明涉及农业机械技术领域，具体是一种气吸式大蒜定向排种装置。
背景技术
由于大蒜蒜种形状不规则，体积相对较大，不同品种蒜瓣形状、大小差异大，且农艺要求牙尖向上单粒直立播种，所以蒜种的定向和单粒排种装置的开发设计是实现大蒜种植机械化的关键。
目前，国内外大蒜种植机械排种装置主要有机械式和气吸式两种，其主要作用是实现单粒排种，能实现单粒定向排种的很少，气吸式的大蒜定向排种装置几乎没有。现有的蒜种机械化定向技术只对具有形状相对规则、重心靠下、牙尖较长特征的蒜种品种起作用，对种植量较大的一般品种的蒜种定向效果达不到实际应用要求。
发明内容
本发明要解决的技术问题是克服现有技术的缺陷，采用蒜种牙尖图像识别控制技术，提供一种用于大蒜种植机、对蒜种品种适应性强的气吸式大蒜定向排种装置，以提高大蒜种植机的立直率，保证播种质量，有利于大蒜的高产。
为了解决上述技术问题，本发明提供了如下的技术方案：
一种气吸式大蒜定向排种装置，包括种子室壳体、吸种室壳体、吸种盘、密封圈、定向弹片、内定向针、外定向针、图像采集器、旋转定向装置、图像识别控制单元、传动轴和传动链轮，种子室壳体和吸种室壳体固定连接，吸种盘布置在种子室壳体和吸种室壳体之间，在吸种盘和吸种室壳体之间设置密封圈，密封圈、吸种盘、吸种室壳体围成吸种室，吸种室壳体上设有吸管，吸管和吸种室连通，吸种盘和种子室壳体围成种子室，种子室壳体上端开口，吸种盘沿圆周均匀布置多个圆形通孔，每个圆形通孔内设置一个组合吸块，组合吸块与圆形通孔间隙配合，组合吸块中心设有吸种通孔，对应吸种盘的斜上方沿各吸种通孔中心圆逆时针依次布置定向弹片、内定向针、外定向针、图像采集器和旋转定向装置，定向弹片、内定向针、外定向针、图像采集器、固定在种子室壳体上，旋转定向装置在吸种盘的另一侧且固定在吸种室壳体上，定向弹片、图像采集器和旋转定向装置的中心对应吸种通孔中心圆，内定向针、外定向针分别位于吸种通孔中心圆的内侧和外侧，传动 轴一端和吸种盘中心固定连接，另一端和传动链轮固定连接，中间经轴承支撑在吸种室壳体上。
所述的组合吸块由拨动活块和吸种活块组成，拨动活块和吸种活块经螺钉固定连接，拨动活块和吸种活块与吸种盘接触的圆柱侧面设置成阶梯形，且阶梯直径从中间向两侧逐渐增大，拨动活块在吸种室一侧的表面对称设有两个凹槽，凹槽底平面与拨动活块表面平行、与凹槽的一侧径向面垂直、与另一侧径向面的夹角100-130°。
所述的旋转定向装置包括电机、转臂、套筒、拨杆和弹簧，套筒、拨杆和弹簧成对设置，电机在吸种室外且固定在吸种室壳体上，电机轴穿过吸种室壳体伸进吸种室内，转臂中间沿吸种盘径向与电机轴固定连接，转臂两端分别垂直固定连接两个套筒，拨杆为中间设置台肩的圆柱形，两个拨杆的一端分别装入两个套筒内，拨杆与套筒间隙配合，两个套筒外分别套装两个弹簧，两个拨杆的另一端与拨动活块表面接触，当组合吸块随吸种盘转动到旋转定向装置位置时，两个拨杆与拨动活块表面接触的一端可分别伸入拨动活块表面对称设的两个凹槽内。
其工作原理为：一种气吸式大蒜定向排种装置安装在大蒜种植机上，吸管连通风机入口，由拖拉机提供动力驱动传动链轮转动和风机工作，大蒜种植机种箱的蒜种经种子室壳体上端开口适量的进入种子室，风机工作通过吸管使吸种室产生负压，传动链轮带动吸种盘逆时针转动，吸种盘上组合吸块的吸种通孔转动到吸种区时，种子室里的蒜种在负压作用下吸附在吸种通孔上面，吸种通孔上的蒜种随吸种盘继续转动进入定向区，转过定向弹片时，定向弹片将站立的蒜种拨倒，使蒜种平躺在吸种盘的吸种通孔上，当吸种通孔转过内定向针和外定向针，吸种通孔上的蒜种在内定向针和外定向针的约束下，拨掉多余的蒜种只留一粒，并使蒜种的长度方向沿着运动方向、牙尖朝前或朝后，实现第一次定向，第一次定向后的蒜种随吸种盘转到图像采集器位置时，图像采集器采集蒜种图像，蒜种图像经图像识别控制单元判断蒜种的牙尖朝向，若蒜种的牙尖朝前，图像识别控制单元向电机发出信号，当携带蒜种的组合吸块运动到转动定向装置位置时，启动电机转动180°，通过拨杆拨动组合吸块相对吸种盘自转180°，蒜种也随之自转180°，使蒜种牙尖朝后，完成第二次定向，进入排种区的蒜种牙尖都是向后的，在排种区牙尖向上直立排出，完成单粒蒜种定向排出，以此类推，气吸式大蒜定向排种装置将蒜种一粒一粒间隔定向排出。
本发明所达到的有益效果是：
1.本发明定向弹片、内定向针和外定向针实现对蒜种的单粒化和第一次定向，蒜种在到达图像采集器进行图像采集识别时，牙尖朝向只有朝前和朝后两种情形，图像识别处理简单快速、准确。
2.本发明蒜种的定向分两次定向多次调整，二次旋转定向机构运动简单，排出的蒜种牙尖朝向一致率高，可提高大蒜种植机的立直种植率。
3.本发明采用气吸式取种和图像识别控制技术相结合实现蒜种的单粒定向排种，对蒜种的形状、重心分布等特征没有特别要求，适宜于各类蒜种的单粒定向排种。
附图说明
图1是本发明实施例的结构示意图。
图2是图1的A-A剖视图。
图3是旋转定向装置结构示意图。
图4是图3的B-B剖视图。
其中图中：1、种子室壳体；2、吸种室壳体；3、吸种盘；4、密封圈；5、传动轴；6、传动链轮；7、定向弹片；8、内定向针；9、外定向针；10、图像采集器；11、吸种室；12、种子室；13、吸管；14、电机；15、转臂；16、套筒；17、弹簧；18、拨杆；19、拨动活块；20、吸种活块；21、螺钉。
具体实施方式
以下结合附图对本发明的优选实施例进行说明，应当理解，此处所描述的优选实施例仅用于说明和解释本发明，并不用于限定本发明。
实施例：
如图1至图4所示，一种大蒜气吸式定向排种装置，包括种子室壳体1、吸种室壳体2、吸种盘3、密封圈4、定向弹片7、内定向针8、外定向针9、图像采集器10、旋转定向装置、图像识别控制单元、传动轴5和传动链轮6，种子室壳体1和吸种室壳体2固定连接，吸种盘3布置在种子室壳体1和吸种室壳体2之间，在吸种盘3和吸种室壳体2之间设置密封圈4，密封圈4、吸种盘3、吸种室壳体2围成吸种室11，吸种室壳体2上设有吸管13，吸管13和吸种室11连通，吸种盘3和种子室壳体1围成种子室12，种子室壳体1上端开口，吸种盘3沿圆周均匀布置多个圆形通孔，每个圆形通孔内设置一个组合吸块，组合吸块与圆形通孔间隙配合，组合吸块中心设有吸种通孔，对应吸种盘3的斜上方沿各吸种通孔中心圆逆时针依次布置定向弹片7、内定向针8、外定向针9、图像采集器10和旋转定向装置，定向弹片7、内定向针8、外定向针9、图像采集器10固定在种子室壳体1上，旋转定向装置在吸种盘3的另一侧且固定在吸种室壳体2上，定向弹片7、图像采集器10和旋转定向装置的中心对应吸种通孔中心圆，内定向针8、外定向针9分别位于吸种通孔中心圆的内侧和外侧，传动轴5一端和吸种盘3中心固定连接，另一端和传动链轮6固定连接，中间经轴承支撑在吸种室壳体2上。组合吸块由拨动活块19和吸种活 块20组成，拨动活块19和吸种活块20经螺钉21固定连接，拨动活块19和吸种活块20与吸种盘3接触的圆柱侧面设置成阶梯形，且阶梯直径从中间向两侧逐渐增大，拨动活块19在吸种室一侧的表面对称设有两个径向凹槽，凹槽底平面与拨动活块19表面平行、与凹槽的一侧径向面垂直、与另一侧径向面的夹角120°。旋转定向装置包括电机14、转臂15、两个套筒16、两个拨杆18和两个弹簧17，电机在吸种室11外且固定在吸种室壳体2上，电机轴穿过吸种室壳体2伸进吸种室11内，转臂15中间沿吸种盘3径向与电机轴固定连接，转臂15两端分别垂直固定连接两个套筒16，拨杆18为中间设置台肩的圆柱形，两个拨杆18的一端分别装入两个套筒16内，拨杆18与套筒16间隙配合，两个套筒16外分别套装两个弹簧17，两个拨杆18的另一端与拨动活块19表面接触，当组合吸块随吸种盘3转动到旋转定向装置位置时，两个拨杆18与拨动活块19表面接触的一端可分别伸入拨动活块19表面对称设的两个凹槽内。

Claims (3)

  1. 一种气吸式大蒜定向排种装置，包括种子室壳体(1)、吸种室壳体(2)、吸种盘(3)、密封圈(4)、定向弹片(7)、内定向针(8)、外定向针(9)、图像采集器(10)、旋转定向装置、图像识别控制单元、传动轴(5)和传动链轮(6)，其特征在于：种子室壳体(1)和吸种室壳体(2)固定连接，吸种盘(3)布置在种子室壳体(1)和吸种室壳体(2)之间，在吸种盘(3)和吸种室壳体(2)之间设置密封圈(4)，密封圈(4)、吸种盘(3)、吸种室壳体(2)围成吸种室(11)，吸种室壳体(2)上设有吸管(13)，吸管(13)和吸种室(11)连通，吸种盘(3)和种子室壳体(1)围成种子室(12)，种子室壳体(1)上端开口，吸种盘(3)沿圆周均匀布置多个圆形通孔，每个圆形通孔内设置一个组合吸块，组合吸块与圆形通孔间隙配合，组合吸块中心设有吸种通孔，对应吸种盘(3)的斜上方沿各吸种通孔中心圆逆时针依次布置定向弹片(7)、内定向针(8)、外定向针(9)、图像采集器(10)和旋转定向装置，定向弹片(7)、内定向针(8)、外定向针(9)、图像采集器(10)固定在种子室壳体(1)上，旋转定向装置在吸种盘(3)的另一侧且固定在吸种室壳体(2)上，定向弹片(7)、图像采集器(10)和旋转定向装置的中心对应吸种通孔中心圆，内定向针(8)、外定向针(9)分别位于吸种通孔中心圆的内侧和外侧，传动轴(5)一端和吸种盘(3)中心固定连接，另一端和传动链轮(6)固定连接，中间经轴承支撑在吸种室壳体(2)上。
  2. 根据权利要求1所述的一种气吸式大蒜定向排种装置，其特征在于：组合吸块由拨动活块(19)和吸种活块(20)组成，拨动活块(19)和吸种活块(20)由螺钉(21)固定连接，拨动活块(19)和吸种活块(20)与吸种盘(3)接触的圆柱侧面设置成阶梯形，且阶梯直径从中间向两侧逐渐增大，拨动活块(19)在吸种室一侧的表面对称设有两个径向凹槽，凹槽底平面与拨动活块(19)表面平行、与凹槽的一侧径向面垂直、与另一侧径向面的夹角100-130°。
  3. 根据权利要求1所述的一种气吸式大蒜定向排种装置，其特征在于：所述旋转定向装置包括电机(14)、转臂(15)、套筒(16)、拨杆(18)和弹簧(17)，其中套筒(16)、拨杆(18)、弹簧(17)成对设置，电机在吸种室(11)外且固定在吸种室壳体(2)上，电机轴穿过吸种室壳体(2)伸进吸种室(11)内，转臂(15)中间沿吸种盘(3)径向与电机轴固定连接，转臂(15)两端分别垂直固定连接两个套筒(16)，拨杆(18)为中间设置台肩的圆柱形，两个拨杆(18)的一端分别装入两个套筒(16)内，拨杆(18)与套 筒(16)间隙配合，两个套筒(16)外分别套装两个弹簧(17)，两个拨杆(18)的另一端与拨动活块(19)表面接触，当组合吸块随吸种盘(3)转动到旋转定向装置位置时，两个拨杆(18)与拨动活块(19)表面接触的一端可分别伸入拨动活块(19)表面对称设的两个凹槽内。
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