CN111108869A

CN111108869A - Seed sowing device

Info

Publication number: CN111108869A
Application number: CN202010062616.7A
Authority: CN
Inventors: 于江龙; 刘冰; 郝文超; 辛天宇
Original assignee: Heilongjiang Fengwo Feifan Agricultural Technology Development Co Ltd
Current assignee: Heilongjiang Fengwo Feifan Agricultural Technology Development Co Ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-05-08
Anticipated expiration: 2040-01-19
Also published as: CN111108869B

Abstract

The invention discloses a seed sowing device.A shell is provided with a top plate, a first side plate and a second side plate, wherein a seed inlet is formed in the top plate, and a first baffle and a second baffle are obliquely fixed between the first side plate and the second side plate; the lower end of the second baffle is provided with a seed outlet, the transmission shaft is rotationally connected with the first side plate and the second side plate, a driving sowing wheel is fixed on the transmission shaft, a driven sowing wheel is sleeved on the transmission shaft and is detachably connected with the driving sowing wheel, the sowing teeth arranged on the driving sowing wheel and the driven sowing wheel are different in size, and the outer side surfaces of the driving sowing wheel and the driven sowing wheel are opposite to the seed outlet; the seeding control frame is detachably connected to the second baffle plate and covers the outer peripheral sides of the driving seeding wheel and the driven seeding wheel; the transmission shaft is in transmission connection with the driving device. Aim at solves the problem that the seed metering device in the prior art can not simultaneously seed seeds with different particle sizes. The effect is as follows: the adaptability of the seed metering device to seed particles is obviously improved.

Description

Seed sowing device

Technical Field

The embodiment of the invention relates to the technical field of core components of seeders, in particular to a seed sowing device.

Background

The seed metering ware is the core component of seeder, a seed for seed to the seeder seed incasement carries out even equivalent distribution, the quality of seeder seeding quality directly depends on the performance of seed metering ware good and bad, the seed metering ware of drilling machine among the prior art's seed wheel single structure, only can realize the regulation of the volume of broadcasting size of single kind seed, can't be applicable to the seed of equidimension not, the seed of great granule and the seed of less granule often need to be changed different seed metering wares and just can satisfy the user demand, lack one kind and can realize the seed metering ware of the different granule size seeds of same seed metering ware seeding through simple part regulation.

Disclosure of Invention

Therefore, the embodiment of the invention provides a seed sowing device, which solves the problem that seeds with different particle sizes cannot be sown simultaneously in the seed sowing device in the prior art.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

according to a first aspect of an embodiment of the present invention, a seed sowing device comprises a housing, a first baffle, a second baffle, a transmission shaft, a driving sowing wheel, a driven sowing wheel, a sowing control frame and a driving device; the shell is provided with a top plate, a first side plate and a second side plate which are vertically fixed on the top plate, the first side plate and the second side plate are parallel to each other, a seed inlet is formed in the top plate, the first baffle plate and the second baffle plate are obliquely fixed between the first side plate and the second side plate, and an accommodating cavity with an upper end opened is formed among the first baffle plate, the second baffle plate, the first side plate and the second side plate; the lower end of the second baffle is provided with a seed outlet, the two ends of the transmission shaft are respectively rotatably connected with the first side plate and the second side plate, a driving sowing wheel is fixed on the transmission shaft, a driven sowing wheel is sleeved on the transmission shaft and is detachably connected with the driving sowing wheel, the size of the sowing teeth arranged on the driving sowing wheel is different from that of the sowing teeth arranged on the driven sowing wheel, and the outer side surfaces of the driving sowing wheel and the driven sowing wheel are opposite to the seed outlet; the seeding control frame is detachably connected to the second baffle plate, the seeding control frame covers the outer peripheral sides of the driving seeding wheel and the driven seeding wheel, and a seed discharging port with adjustable size is arranged between the seeding control frame and the bottom surfaces of the outer peripheral sides of the driving seeding wheel and the driven seeding wheel; the transmission shaft is in transmission connection with the driving device.

Furthermore, the tongue plate opening device also comprises an opening tongue plate, a tongue plate rotating shaft and a cotter pin; the seeding control frame has two vertical lateral walls that are parallel to each other, the both ends of hyoplastron pivot are rotated respectively and are connected on two lateral walls of seeding control frame, the pot head of opening hyoplastron is established and is fixed in the hyoplastron pivot, the other end of opening hyoplastron extends to the lateral wall of initiative seeding wheel and driven seeding wheel, the opening hyoplastron has the arc surface with the common periphery side looks adaptation of initiative seeding wheel and driven seeding wheel, a plurality of regulation holes have been equally divided equally to two lateral walls of seeding control frame, the grafting that the split pin corresponds is in a set of regulation hole, the one end downside butt that the opening deviates from the hyoplastron pivot is on the split pin.

Furthermore, the sowing control frame also comprises a tongue plate adjusting plate, one end of the tongue plate adjusting plate is fixed at the end part of the tongue plate rotating shaft, and the tongue plate adjusting plate is positioned on the outer side of the vertical side wall of the sowing control frame.

Furthermore, the device also comprises a positioning sleeve, an adjusting pin and an adjusting screw; the position sleeve is fixed on the transmission shaft, and the lateral wall of position sleeve is the face of cylinder, and driven seeding wheel cover is established on the lateral wall of position sleeve, has all seted up the round hole on the spoke face of initiative seeding wheel and driven seeding wheel, and the adjusting pin is pegged graft in the round hole of initiative seeding wheel and driven seeding wheel, and adjusting screw follows the radial direction threaded connection of driven seeding wheel in driven seeding wheel, and adjusting screw's terminal butt is on the adjusting pin.

Furthermore, the transmission shaft is a hexagonal shaft, and a hexagonal hole is formed in the positioning sleeve.

Further, the driving device comprises a driving motor, a driving belt wheel, a driven belt wheel and a synchronous belt; the driving motor is arranged between the first side plate and the second side plate, the shell of the driving motor is fixed on the first side plate, the output shaft of the driving motor penetrates through the first side plate and is fixed with the driving belt wheel, the driven belt wheel rotates and is fixed at the end part of the transmission shaft, the driven belt wheel and the driving belt wheel are connected through synchronous belt transmission, and the driving belt wheel and the driven belt wheel are both located outside the first side plate.

Further, still include the transmission safety cover, the joint of transmission safety cover is on the first curb plate at driving pulley and driven pulley place, and the transmission safety cover is established driving pulley, driven pulley and hold-in range cover on the first curb plate of casing.

Further, still include a plurality of guard shield fixing clips, a plurality of fixing clips can dismantle the connection on first curb plate, and the guard shield fixing clip is buckled for the shell fragment and forms, and the guard shield fixing clip has from outer to interior crescent opening, and the inside of transmission safety cover is provided with a plurality of joint archs that correspond with the guard shield fixing clip, and the joint that the joint arch corresponds is in the guard shield fixing clip.

Further, still include the joint screw, the guard shield fixing clip passes through the joint screw and can dismantle the connection on first curb plate.

Further, still include the drive circuit box, the drive circuit box can be dismantled and set up on the second curb plate, and the surface of drive circuit box is provided with power indicator, stall state lamp, fault status lamp and communication status lamp.

The invention has the following advantages: according to the invention, the driving sowing wheel and the driven sowing wheel are both arranged on the transmission shaft, so that the seed sowing device can be simultaneously suitable for crop seeds with different particle sizes, and the adaptability of the seed sowing device to seed particles is obviously improved; the shell is provided with the structure of the top plate, the first side plate and the second side plate, and the first baffle and the second baffle are matched to form the accommodating cavity for accommodating seeds of the seed sowing device in rows, so that the structure is simple, the huge mould cost required by the shell mould opening of the conventional seed sowing device is reduced, and the processing cost is obviously reduced; meanwhile, the seeding unit has simple structure of components, low processing cost and convenient maintenance and repair.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

Fig. 1 is a perspective view of a seeding apparatus according to some embodiments of the present invention.

FIG. 2 is a first perspective view of a seed meter with a drive guard removed according to some embodiments of the present invention.

FIG. 3 is a second perspective view of a seed meter with a drive guard removed according to some embodiments of the present invention.

FIG. 4 is a third perspective view of a seed meter with a drive guard removed according to some embodiments of the present invention.

FIG. 5 is an exploded view of a seed meter according to some embodiments of the present invention.

FIG. 6 is a partial block diagram of a seed meter according to some embodiments of the present invention.

FIG. 7 is a front view of a seed meter according to some embodiments of the present invention.

FIG. 8 is a top view of a seed meter according to some embodiments of the present invention.

FIG. 9 is a left side view of a seed meter according to some embodiments of the present invention.

In the figure: 1. the seeding machine comprises a shell, 2, a seed inlet, 3, a first baffle, 4, a second baffle, 5, a seed outlet, 6, a transmission shaft, 7, a driven seeding wheel, 8, a driving seeding wheel, 9, a seeding control frame, 10 adjusting holes, 11, a split pin, 12, a driving belt wheel, 13, a driven belt wheel, 14, a synchronous belt, 15, a clamping screw, 16, a shield fixing clamp, 17, a transmission protective cover, 18, a driving circuit box, 19, an open tongue plate, 20, a tongue plate rotating shaft, 21, a driving motor, 22, a tongue plate adjusting plate, 23, a positioning sleeve, 24, an adjusting pin, 25, an adjusting screw, 26, a first side plate, 27 and a second side plate.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1 to 9, the seed sowing device in the present embodiment includes a housing 1, a first baffle 3, a second baffle 4, a transmission shaft 6, a driving sowing wheel 8, a driven sowing wheel 7, a sowing control frame 9 and a driving device; the shell 1 is provided with a top plate, a first side plate 26 and a second side plate 27 which are vertically fixed on the top plate, the first side plate 26 and the second side plate 27 are parallel to each other, the top plate is provided with a seed inlet 2, a first baffle plate 3 and a second baffle plate 4 are obliquely fixed between the first side plate 26 and the second side plate 27, and an accommodating cavity with an upper end opened is formed among the first baffle plate 3, the second baffle plate 4, the first side plate 26 and the second side plate 27; the lower end of the second baffle 4 is provided with a seed outlet 5, two ends of a transmission shaft 6 are respectively rotatably connected with a first side plate 26 and a second side plate 27, a driving sowing wheel 8 is fixed on the transmission shaft 6, a driven sowing wheel 7 is sleeved on the transmission shaft 6 and detachably connected with the driving sowing wheel 8, the size of a sowing tooth arranged on the driving sowing wheel 8 is different from that of a sowing tooth arranged on the driven sowing wheel 7, and the outer side surfaces of the driving sowing wheel 8 and the driven sowing wheel 7 are opposite to the seed outlet 5; the seeding control frame 9 is detachably connected to the second baffle 4, the seeding control frame 9 covers the outer peripheral sides of the driving seeding wheel 8 and the driven seeding wheel 7, and seed discharging ports with adjustable sizes are arranged between the seeding control frame 9 and the bottom surfaces of the outer peripheral sides of the driving seeding wheel 8 and the driven seeding wheel 7; the transmission shaft 6 is in transmission connection with a driving device.

In this embodiment, the housing 1 is a structure formed by bending a steel plate to form a top plate, a first side plate 26 and a second side plate 27, a connecting hole for connecting the seed box is arranged on the upper side of the top plate, the open end of an accommodating cavity formed among the first baffle plate 3, the second baffle plate 4, the first side plate 26 and the second side plate 27 is a seed inlet 2, two ends of the transmission shaft 6 are respectively connected to the first side plate 26 and the second side plate 27 through bearings and bearing seats in a rotating manner, and the seed outlet 5 is used for conveying seeds to a seed discharging port of the seeding control frame 9 through the rotation of the driving seeding wheel 8 and the driven seeding wheel 7; the driving device is composed of a motor and a transmission device, and the transmission device can adopt the forms of gear transmission, belt transmission, chain transmission and the like; the seeding tooth on the initiative seeding wheel 8 is double, and two rows of seeding teeth on the initiative seeding wheel 8 are crisscross to be set up, and the seeding tooth on the driven seeding wheel 7 is double, and two rows of seeding teeth on the driven seeding wheel 7 are crisscross to be set up, through the seeding tooth of crisscross setting, have improved the stability of class seed flow.

The technical effect that this embodiment reaches does: according to the embodiment, the driving sowing wheel 8 and the driven sowing wheel 7 are both arranged on the transmission shaft 6, so that the seed sowing device can be simultaneously suitable for crop seeds with different particle sizes, and the adaptability of the seed sowing device to seed particles is remarkably improved; the shell 1 is provided with the structure of the top plate, the first side plate 26 and the second side plate 27, and the first baffle 3 and the second baffle 4 are matched to form a seed accommodating cavity of the seed metering device, so that the structure is simple, the huge mould cost required by the mould opening of the shell 1 of the conventional seed metering device is reduced, and the processing cost is obviously reduced; meanwhile, the seeding unit has simple structure of components, low processing cost and convenient maintenance and repair.

Example 2

As shown in fig. 1 to 9, the seed metering device in the present embodiment includes all the technical features of embodiment 1, in addition, an open tongue plate 19, a tongue plate rotating shaft 20 and a split pin 11; the seeding control frame 9 is provided with two vertical side walls which are parallel to each other, two ends of a tongue plate rotating shaft 20 are respectively connected to the two side walls of the seeding control frame 9 in a rotating mode, one end of an opening tongue plate 19 is sleeved and fixed on the tongue plate rotating shaft 20, the other end of the opening tongue plate 19 extends to the outer side walls of the driving seeding wheel 8 and the driven seeding wheel 7, the opening tongue plate 19 is provided with an arc surface matched with the common peripheral side of the driving seeding wheel 8 and the driven seeding wheel 7, the two side walls of the seeding control frame 9 are respectively provided with a plurality of adjusting holes 10, a split pin 11 is correspondingly inserted into one group of adjusting holes 10, and the lower side of one end, away from the tongue plate rotating shaft 20, of the opening; a tongue plate adjusting plate 22 is further included, one end of the tongue plate adjusting plate 22 is fixed at the end part of the tongue plate rotating shaft 20, and the tongue plate adjusting plate 22 is positioned outside the vertical side wall of the seeding control frame 9.

In the embodiment, the gap between the opening tongue plate 19 and the driving sowing wheel 8 and the driven sowing wheel 7 is the seed discharging port of the seed metering device, wherein the seed control frame 9 is internally provided with an accommodating cavity communicated from the seed discharging port 5 to the outside, and the opening tongue is arranged in the accommodating cavity; the distances from the plurality of adjusting holes 10 to the rotating shaft of the opening tongue plate 19 are equal, the plurality of adjusting holes 10 are distributed at equal intervals along an arc, a scale value is arranged on an extending arc curve of the adjusting holes 10, and the adjusting size of the racket weight can be known by setting the scale value.

In the using process, the deflection angle of the opening tongue plate 19 is adjusted through the opening pin 11, so that the adjustment of the gap between the tail end of the opening tongue plate 19 and the outer side walls of the driving sowing wheel 8 and the driven sowing wheel 7 is realized, and the adjustment of the size of the seed discharging port is realized.

The beneficial effects in this embodiment are: the opening tongue plate 19 is arranged, so that the convenience of adjusting the seed metering quantity of the seed metering device is obviously improved, and the adjustment is convenient and reliable; the tongue plate adjusting plate 22 is arranged, so that the difficulty of manually adjusting the open tongue plate 19 is reduced, and the required strength is reduced.

Example 3

As shown in fig. 1 to 9, the seed metering device in the present embodiment includes all the technical features of embodiment 2, and in addition, includes a positioning sleeve 23, an adjusting pin 24 and an adjusting screw 25; the positioning sleeve 23 is fixed on the transmission shaft 6, the outer side wall of the positioning sleeve 23 is a cylindrical surface, the driven sowing wheel 7 is sleeved on the outer side wall of the positioning sleeve 23, the spoke surfaces of the driving sowing wheel 8 and the driven sowing wheel 7 are both provided with round holes, the adjusting pin 24 is inserted into the round holes of the driving sowing wheel 8 and the driven sowing wheel 7, the adjusting screw 25 is in threaded connection with the driven sowing wheel 7 along the radial direction of the driven sowing wheel 7, and the tail end of the adjusting screw 25 is abutted against the adjusting pin 24; the transmission shaft 6 is a hexagonal shaft, a hexagonal hole is formed in the positioning sleeve 23, in the embodiment, the axis of the adjusting pin 24 is parallel to the axis of the transmission shaft 6, and the driven sowing wheel 7 can rotate relative to the outer side wall of the positioning sleeve 23.

In the using process, when the driven sowing wheel 7 needs to be fixed on the driving sowing wheel 8, the adjusting pin 24 penetrates through the driving sowing wheel 8 and the driven sowing wheel 7, and the adjusting screw 25 is screwed and abutted on the adjusting pin 24; when the driven sowing wheel 7 does not rotate along with the driving sowing wheel 8, the adjusting screw 25 is unscrewed to be separated from the adjusting pin 24, and the adjusting pin 24 is pulled out of the driving sowing wheel 8.

The beneficial effects in this embodiment are: the rotation of the driven sowing wheel 7 on the positioning sleeve 23 is realized by arranging the positioning sleeve 23; through setting up adjusting pin 24 and adjusting screw 25, showing the degree of difficulty that has reduced the cooperation between initiative seeding wheel 8 and the driven seeding wheel 7, the adjustment is convenient quick, saves time, is showing and is improving adjustment efficiency.

Example 4

As shown in fig. 1 to 9, the seed sowing device in the present embodiment includes all the technical features of embodiment 3, and in addition, the driving device includes a driving motor 21, a driving pulley 12, a driven pulley 13 and a timing belt 14; the driving motor 21 is arranged between the first side plate 26 and the second side plate 27, the shell 1 of the driving motor 21 is fixed on the first side plate 26, the output shaft of the driving motor 21 penetrates through the first side plate 26 and is fixed with the driving pulley 12, the driven pulley 13 is rotationally fixed at the end part of the transmission shaft 6, the driven pulley 13 is in transmission connection with the driving pulley 12 through the synchronous belt 14, and the driving pulley 12 and the driven pulley 13 are both positioned at the outer side of the first side plate 26; the transmission protection cover 17 is clamped on a first side plate 26 where the driving belt wheel 12 and the driven belt wheel 13 are located, and the driving belt wheel 12, the driven belt wheel 13 and the synchronous belt 14 are covered on the first side plate 26 of the shell 1 by the transmission protection cover 17; the protective cover is characterized by further comprising a plurality of protective cover fixing clamps 16, the protective cover fixing clamps 16 are detachably connected to the first side plate 26, the protective cover fixing clamps 16 are formed by bending elastic sheets, the protective cover fixing clamps 16 are provided with openings gradually increasing from outside to inside, a plurality of clamping protrusions corresponding to the protective cover fixing clamps 16 are arranged inside the transmission protective cover 17, and the clamping protrusions are correspondingly clamped in the protective cover fixing clamps 16; still include joint screw 15, guard shield fixing clip 16 passes through joint screw 15 and can dismantle the connection on first curb plate 26.

In this embodiment, the driving pulley 12 and the driven pulley 13 are both synchronous pulleys, the driving pulley 12 is fixed to the output shaft of the driving motor 21 by a pin joint, a hexagonal hole is provided in the driven pulley 13, and the driven pulley 13 is fixed to the transmission shaft 6 by a spacer and a screw.

The beneficial effects in this embodiment are: by arranging the synchronous belt 14, the stability of power transmission is improved, the seed sowing device runs stably, the seed sowing device does not slip easily in the transmission process, and the uniformity of seed sowing quantity is obviously improved; by arranging the transmission protective cover 17, the phenomenon that the transmission device is wound and clamped is avoided, and the safety of the transmission mechanism is ensured; the protective cover fixing clamp 16 formed by bending the elastic sheet is arranged, so that the disassembly difficulty of the transmission protective cover 17 is obviously reduced, the maintenance efficiency is improved, and tools required for disassembling the transmission protective cover 17 are reduced.

Example 5

As shown in fig. 1 to 9, the seed metering device in this embodiment includes all the technical features of embodiment 4, and in addition, further includes a driving circuit box 18, the driving circuit box 18 is detachably disposed on the second side plate 27, a power indicator, a stall state lamp, a fault state lamp and a communication state lamp are disposed on an outer surface of the driving circuit box 18, in this embodiment, a circuit board and a controller are disposed in the driving circuit box 18, the controller is electrically connected to the driving motor 21 through the circuit board, the power indicator, the stall state lamp, the fault state lamp and the communication state lamp are electrically connected to the controller through the circuit board, and the controller can adjust the rotation speed of the seed metering device according to the rotation speed of an encoder disposed on a traveling wheel of the machine; the stall state and the fault state of the seed sowing device can be realized by detecting signals through a sensor, for example, a photoelectric sensor is arranged at a seed sowing port of the seed sowing device so as to detect whether seeds are normally discharged or not, and the signals are transmitted to a controller to realize the display of the fault state, wherein the circuit is a common circuit in the prior art in the seed sowing machine.

The beneficial effects in this embodiment are: by arranging the driving circuit box 18, the safety of electronic components arranged on the seed sowing device is protected.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content.

Claims

1. A seeding apparatus is characterized by comprising a shell (1), a first baffle (3), a second baffle (4), a transmission shaft (6), a driving seeding wheel (8), a driven seeding wheel (7), a seeding control frame (9) and a driving device; the shell (1) is provided with a top plate, a first side plate (26) and a second side plate (27) which are vertically fixed on the top plate, the first side plate (26) and the second side plate (27) are parallel to each other, the top plate is provided with a seed inlet (2), the first baffle plate (3) and the second baffle plate (4) are obliquely fixed between the first side plate (26) and the second side plate (27), and an accommodating cavity with an upper end opened is formed among the first baffle plate (3), the second baffle plate (4), the first side plate (26) and the second side plate (27); a seed outlet (5) is formed in the lower end of the second baffle (4), two ends of the transmission shaft (6) are respectively rotatably connected with the first side plate (26) and the second side plate (27), the driving sowing wheel (8) is fixed on the transmission shaft (6), the driven sowing wheel (7) is sleeved on the transmission shaft (6) and detachably connected with the driving sowing wheel (8), the size of sowing teeth arranged on the driving sowing wheel (8) is different from that of sowing teeth arranged on the driven sowing wheel (7), and the outer side surfaces of the driving sowing wheel (8) and the driven sowing wheel (7) are opposite to the seed outlet (5); the seeding control frame (9) is detachably connected to the second baffle (4), the seeding control frame (9) covers the outer peripheral sides of the driving seeding wheel (8) and the driven seeding wheel (7), and a seed discharging port with adjustable size is arranged between the seeding control frame (9) and the bottom surfaces of the outer peripheral sides of the driving seeding wheel (8) and the driven seeding wheel (7); the transmission shaft (6) is in transmission connection with the driving device.

2. A seed metering device according to claim 1, characterized by further comprising a split flap (19), a flap rotary shaft (20) and a split pin (11); the seeding control frame (9) is provided with two vertical side walls which are parallel to each other, two ends of the tongue plate rotating shaft (20) are respectively and rotatably connected to the two side walls of the seeding control frame (9), one end of the open tongue plate (19) is sleeved and fixed on the tongue plate rotating shaft (20), the other end of the opening tongue plate (19) extends to the outer side walls of the driving sowing wheel (8) and the driven sowing wheel (7), the opening tongue plate (19) is provided with a circular arc surface which is matched with the common peripheral side of the driving sowing wheel (8) and the driven sowing wheel (7), a plurality of adjusting holes (10) are respectively arranged on the two side walls of the seeding control frame (9), the split pin (11) is correspondingly inserted into one group of adjusting holes (10), and the lower side of one end, deviating from the tongue plate rotating shaft (20), of the split tongue plate (19) abuts against the split pin (11).

3. The seed metering device according to claim 2, characterized by further comprising a flap adjusting plate (22), wherein one end of the flap adjusting plate (22) is fixed at the end of the flap rotating shaft (20), and the flap adjusting plate (22) is positioned outside the vertical side wall of the seeding control frame (9).

4. The seed metering device according to claim 1, characterized by further comprising a positioning sleeve (23), an adjusting pin (24) and an adjusting screw (25); the positioning sleeve (23) is fixed on the transmission shaft (6), the outer side wall of the positioning sleeve (23) is a cylindrical surface, the driven sowing wheel (7) is sleeved on the outer side wall of the positioning sleeve (23), round holes are formed in the spoke surfaces of the driving sowing wheel (8) and the driven sowing wheel (7), the adjusting pin (24) is inserted into the round holes of the driving sowing wheel (8) and the driven sowing wheel (7), the adjusting screw (25) is in threaded connection with the driven sowing wheel (7) along the radial direction of the driven sowing wheel (7), and the tail end of the adjusting screw (25) is abutted to the adjusting pin (24).

5. The seeding apparatus according to claim 4, wherein the transmission shaft (6) is a hexagonal shaft, and the positioning sleeve (23) is internally provided with a hexagonal hole.

6. A seed meter according to claim 1, characterized in that the driving means comprises a driving motor (21), a driving pulley (12), a driven pulley (13) and a timing belt (14); the driving motor (21) is arranged between the first side plate (26) and the second side plate (27), the shell (1) of the driving motor (21) is fixed on the first side plate (26), the output shaft of the driving motor (21) penetrates through the first side plate (26) and is fixed with the driving pulley (12), the driven pulley (13) rotates and is fixed at the end part of the transmission shaft (6), the driven pulley (13) is connected with the driving pulley (12) through the synchronous belt (14) in a transmission mode, and the driving pulley (12) and the driven pulley (13) are located on the outer side of the first side plate (26).

7. The seed sowing device according to claim 6, further comprising a transmission protective cover (17), wherein the transmission protective cover (17) is clamped on the first side plate (26) where the driving pulley (12) and the driven pulley (13) are located, and the transmission protective cover (17) covers the driving pulley (12), the driven pulley (13) and the synchronous belt (14) on the first side plate (26) of the casing (1).

8. The seed sowing device according to claim 7, further comprising a plurality of shield fixing clips (16) detachably connected to the first side plate (26), wherein the shield fixing clips (16) are formed by bending elastic pieces, the shield fixing clips (16) are provided with openings gradually increasing from outside to inside, a plurality of clamping protrusions corresponding to the shield fixing clips (16) are arranged inside the transmission protection cover (17), and the clamping protrusions corresponding to the clamping protrusions are clamped in the shield fixing clips (16).

9. The seed metering device of claim 8, further comprising a clamping screw (15), wherein the shield fixing clamp (16) is detachably connected to the first side plate (26) through the clamping screw (15).

10. The seed metering device of claim 1, further comprising a drive circuit box (18), wherein the drive circuit box (18) is detachably arranged on the second side plate (27), and a power indicator light, a stall state light, a fault state light and a communication state light are arranged on the outer surface of the drive circuit box (18).