CN202697212U

CN202697212U - Film laminating sowing device

Info

Publication number: CN202697212U
Application number: CN 201220365544
Authority: CN
Inventors: 伍元林; 龙俊成; 肖冲
Original assignee: SICHUAN WUYI MACHINERY MANUFACTURE CO Ltd
Current assignee: SICHUAN WUYI MACHINERY MANUFACTURE CO Ltd
Priority date: 2012-07-26
Filing date: 2012-07-26
Publication date: 2013-01-30
Anticipated expiration: 2022-07-26

Abstract

The utility model discloses a film laminating sowing device, which comprises a travelling mechanism, a sowing mechanism and a film laminating mechanism which are arranged on a machine frame, wherein the sowing mechanism comprises seed boxes and a sowing plate group; the sowing plate group is provided with sowing holes which are large in upper side and small in lower side; the seed boxes are arranged on the sowing plate group; the film laminating mechanism comprises a film roll and a film-laminating wheel; the outer circumference of the film-laminating wheel is in contact with the ground; a film on the film roll is laminated on the ground by the film-laminating wheel; the film-laminating wheel is positioned at the tail end of the machine frame in the travelling direction; and the sowing holes are positioned in front of the rolled film of the film-laminating wheel. According to the film laminating sowing device, the sowing mechanism is arranged in front of the film laminating mechanism, and after seeds fall on the ground through the sowing mechanism, the film covers the ground on which the seeds fall by the film laminating mechanism, so that sowing and film laminating can be performed simultaneously. The sowing holes in the sowing mechanism are large in upper side and small in lower side, so that the one-time sowing quantity of the seeds can be controlled to be within the accurate range in the sowing process, and the seeds can be saved effectively on the premise of full sowing.

Description

The mulch sowing device

Technical field

The utility model relates to the farm machinery technical field, is specially a kind of mulch sowing device.

Background technology

For the sowing of crops, common mode is broadcasted sowing, drilling and program request etc.Wherein, program request claims again bunch planting and since broadcast the row on open at a certain distance the bunch planting kind, so program request can guarantee spacing in the rows and density, be conducive to again save seed.After planting in order to keep air humidity or insulation to heat to seed, generally can be to the field overlay film.Cultivate step for above-mentioned two, existing seeding apparatus function singleness only possesses sowing or one of them function of overlay film mostly.

Existing sower broadcasts sowing design owing to mostly be greatly, and output quantity of seed is larger, so the crop that carries out program request for needs can't be satisfied the demand of saving seed, and can't guarantee equidistant sowing broadcasting on the row.

Existing laminating machine comprises the film conveying mechanism that is arranged on the running gear, can carry out overlay film to the field in walking, guarantees the humidity and temperature of air with this.But, because seed is accepted air and moisture in necessary for growth, so overlay film can not seal fully, need to increase gas permeability for film.In addition, seed needs to stretch out this layer of film obstruction in order to continue smooth growth after the germination of breaking ground.In order to make film have on the one hand preferably gas permeability, can not hinder on the other hand the normal growth of seed, so need to scratch film corresponding on each sowing point.For scratching film, existing implementation is to adopt certain film instrument of drawing, and after the film covering is finished, begins successively it to be scratched air-vent corresponding to formation and the passage of growing from the starting point of sowing.But so not only workload is large, inefficiency, and the film place of scratching can not guarantee that the position is corresponding one by one with sowing point, thereby affects the smooth growth of crops.

In addition, existing type farming equipment mostly is big machinery, mainly is to sow for the smooth field of sheet, for the extreme terrains such as small pieces field or mountain region and inapplicable.For area less field or mountain region, tiller does not have suitable effectively Mini-type farming machinery, and institute is so that the whole inefficiency of cultivating, and the work intensity of tiller is large.

The utility model content

In view of this, the utility model provides the mulch sowing device, for tiller provides a kind of machinery that can realize sowing simultaneously with overlay film.

For solving above technical problem, the technical solution of the utility model is, a kind of mulch sowing device comprises the running gear that is arranged on the frame, and this running gear comprises drive unit and the road wheel that is in transmission connection, and running gear drives the frame walking; Described frame comprises horizontal supporting plate, is provided with sowing mechanism and film-covering mechanism on this horizontal supporting plate; Described sowing mechanism comprises seed-box and seed board group, the lower surface of seed board group and described horizontal supporting plate are fixed, the seed board group is provided with the planting hole that connects the upper and lower plates face, this planting hole is positioned at the eyelet of lower face less than the eyelet of upper face, described seed-box is arranged on the upper face of seed board group, and the discharging opening of seed-box is corresponding with planting hole; Described film-covering mechanism comprises film roll and pressing wheel, and the excircle of pressing wheel contacts with ground; Be connected by film between described film roll and the pressing wheel, the film on the film roll covers on the ground by pressing wheel, forms angle between the film between film roll and the pressing wheel and the ground; Described pressing wheel is positioned at the end of frame direction of travel, and described planting hole is positioned at before the pressing wheel press mold, and the seed in the seed-box drops behind ground by planting hole, and film is covered on the seed-bearing ground by pressing wheel.

Further, described seed board group comprises leakage kind plate setting up and down and minute kind of plate, and minute kind of plate and described horizontal supporting plate are fixed; Leak kind of a plate and be provided with seed leaking hole, minute kind of a plate is provided with seed distributing hole, and the corresponding perforation with seed distributing hole of seed leaking hole arranges and consists of described planting hole, and the aperture of seed leaking hole is greater than the aperture of seed distributing hole; Hole Zhou Chu between seed leaking hole and the seed distributing hole is provided with elastic seal ring; Described leakage kind plate is provided with gathering sill, and the gathering sill direction is consistent with direction of travel, is fixed with guide finger on the described minute kind plate, and guide finger is plugged on and forms matched in clearance in the gathering sill; Be connected by cam mechanism between described leakage kind plate and the drive unit, leak kind of plate and can do the translation reciprocating motion with respect to minute kind of a plate by cam mechanism, translational movement determined by the lift of cam, and this translational movement is greater than the aperture of seed leaking hole, that seed leaking hole and seed distributing hole are done is staggered-and the reciprocating motion of aliging.

Further, described cam mechanism comprises that the wheel shaft of described disc cam is fixed on the described horizontal supporting plate as the disc cam of driving link with as the roller of driven member, is connected by transmission mechanism between disc cam and the drive unit; The wheel shaft of roller then is fixedly connected with leaking kind of a plate, remains that by the elastic recovery part is set the face face offsets between roller and the disc cam.

Further, described film roll and pressing wheel are separately positioned on the both sides of sowing mechanism, and film is entered between pressing wheel and the ground by the below of sowing mechanism; Be provided with between described sowing mechanism and the film and draw film mechanism, this stroke film mechanism comprises balance staff and draws the film pin, wherein balance staff is arranged on the below of seed board group, and form matched in clearance with the lower surface of seed board group, be provided with through hole perpendicular to axis on the balance staff, the position of through hole is corresponding with the position of described planting hole, and described stroke of film pin is fixed on a side of through hole perpendicular to axis; Balance staff is provided with reciprocator, and this reciprocator and described drive unit connecting band movable pendulum axle move reciprocatingly, and described stroke of film pin and balance staff rotate synchronously; Described balance staff, is drawn a film pin and film can be scratched and form rectangular opening less than the length of drawing the film pin to the distance of film; When balance staff was positioned at initial position, the sidewall of balance staff stopped up seed distributing hole; When balance staff rotated, the through hole on the balance staff connected with seed distributing hole gradually.

Further, described reciprocator comprises the thumb wheel that is connected with drive unit, and the end face of thumb wheel is provided with finger, the termination of balance staff is provided with escapement, be fixed with swing arm on the excircle of escapement, described swing arm is overlapped on the finger, and balance staff is provided with spacer pin and has been fixed by socket torsion spring; Balance staff is positioned at the initial position that sidewall stops up seed distributing hole under the effect of spacer pin and torsion spring; When thumb wheel rotated, the finger on the thumb wheel was raised swing arm, and balance staff begins to rotate by the drive of escapement, and the through hole on the balance staff connects with planting hole gradually, until swing arm separates with finger, balance staff returns to initial position by torsion spring.

Further, described balance staff is two or more, and is parallel to each other, and connects realization by linkage between the balance staff and rotates synchronously.

Further, also comprise the film supporting plate in the described film-covering mechanism, this film supporting plate is arranged on the horizontal tray of described seed board group below, is used for support film.

Further, described film supporting plate is provided with the bar hole of up/down perforation, and the position correspondence of this bar hole is arranged on the swinging track of described stroke of film pin.

Further, be provided with film conveying roller between described film supporting plate and the pressing wheel, this film conveying roller is connected with drive unit by transmission mechanism.

Further, described drive unit comprises the engine retarder that is provided with clutch, and the front end of described frame direction of travel is provided with the handrail handle, and handrail is being provided with clutch switch, this clutch switch is connected with clutch by clutch cable, and this handrail is the upper Oil Switch that also is provided with.

Compared with prior art, the utility model is arranged on sowing mechanism and film-covering mechanism on the same frame, take the frame direction of travel as benchmark, because sowing mechanism is arranged on before the film-covering mechanism, after so seed drops on the ground by sowing mechanism, film-covering mechanism just can be covered in film fall on the seed-bearing ground, carries out when having realized sowing and overlay film with this.And the planting hole on the sowing mechanism is shaped as up big and down small, so in seeding process, seed seeding quantity once is controlled in the more accurate scope, can under the prerequisite that satisfies fully sowing, effectively save seed.In addition, the utility model also can be arranged on sowing mechanism on the film-covering mechanism, between sowing mechanism and film-covering mechanism, arrange simultaneously and draw film mechanism, by drawing the film pin film is scratched an opening, seed can be fallen on the ground smoothly by this opening, equally also can reach carrying out synchronously of overlay film and sowing.

Description of drawings

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the partial enlarged drawing of Fig. 1;

Fig. 3 is transmission system schematic diagram of the present utility model;

Fig. 4 is the vertical view of Fig. 3;

Fig. 5 is the structural representation in native railway carriage or compartment in the utility model.

Embodiment

Core thinking of the present utility model is to obtain the device that have sowing and overlay film two kind functions mechanically by sowing mechanism and film-covering mechanism are set with this at one, raising sowing efficient.

In order to make those skilled in the art understand better the technical solution of the utility model, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Referring to Fig. 1, a kind of mulch sowing device comprises the frame 9 with horizontal supporting plate, and is arranged on running gear, sowing mechanism and film-covering mechanism on the horizontal supporting plate.Wherein, running gear comprises the road wheel 6 that is in transmission connection with drive unit, and drive unit is engine 8 and the decelerator that is provided with clutch, and the power take-off in the engine 8 is used to each mechanism that power output is provided.The below carries out the structure explanation to each mechanism respectively:

Sowing mechanism: comprise seed-box 10 and seed board group, this seed board group comprises the up and down corresponding leakage kind plate that arranges 11 and minute kind of plate 12.Leak kind of plate 11 and be respectively equipped with seed leaking hole and seed distributing hole with dividing on kind of the plate 12, wherein the aperture of seed leaking hole is greater than the aperture of seed distributing hole, and the size in seed distributing hole aperture approximately can be held 1～2 seed.Seed leaking hole and up and down corresponding perforation of seed distributing hole, the hole Zhou Chu between seed leaking hole and the seed distributing hole is provided with elastic seal ring 17.

Seed-box 10 is arranged on the seed board, owing to have feeding mouth on the seed-box 10, the below of seed-box 10 is a funnelform discharging opening, so as the discharging opening of seed-box 10 with leak kind plate 11 on the corresponding setting of seed leaking hole.The discharging opening of seed-box 10 equates substantially with the aperture of seed leaking hole, can be slightly large.

Divide kind of a plate to be fixedly connected with horizontal supporting plate.Leak kind of a plate 11 and be provided with gathering sill 33, the direction of gathering sill 33 is consistent with direction of travel.Divide kind of a plate 12 to be provided with guide finger 32, an end of guide finger 32 is fixedly connected with minute kind of a plate 12, and the other end then is plugged in the gathering sill 33, forms matched in clearance with gathering sill 33.

Film-covering mechanism: can comprise two kinds of embodiment about film-covering mechanism.

Embodiment one: film-covering mechanism comprises film roll 5 and pressing wheel 16, and wherein pressing wheel 16 is positioned at the end of frame 9 direction of travel, and the excircle of pressing wheel 16 contacts with ground.Be connected by film 15 between film roll 5 and the pressing wheel 16, the film 15 on the film roll 5 covers on the ground by pressing wheel 16, forms angle between the film 15 between film roll 5 and the pressing wheel 16 and the ground.In order to realize first the after planting flow process of overlay film, sowing mechanism need to be arranged on before film roll 5 and the pressing wheel 16.Like this, when frame 9 began to walk, the seed in the seed-box 10 dropped on the ground by planting hole, and film is covered on the seed-bearing ground by pressing wheel 16.This embodiment draws a film mechanism owing to not arranging, so film covers seed fully.Follow-up also the needs carried out the rupture of membranes processing with film.

Embodiment two: film-covering mechanism comprises film roll 5, film guide wheel 7, film supporting plate 13, film conveying roller 14 and the pressing wheel 16 that is successively set on the horizontal supporting plate.Wherein pressing wheel 16 still is arranged on the end of frame 9 direction of travel, and excircle contacts with ground.But film roll 5 and pressing wheel 16 are separately positioned on the right and left of sowing mechanism, and 13 of film supporting plates are arranged on the horizontal supporting plate of sowing mechanism below.Such setting will so that film through the below of sowing mechanism, by pressing wheel 16 directly and ground paste, seed can't be sowed in the soil.So the set film-covering mechanism of present embodiment must cooperate a stroke film mechanism jointly to sow, so just can in the sowing overlay film, can also carry out rupture of membranes to film and process, further reduce the intensity of sowing, improve the efficient of sowing.

For the embodiment two of film-covering mechanism, draw film mechanism and be arranged between sowing mechanism and the film supporting plate 13, as shown in Figure 2.

Draw film mechanism: comprise balance staff 18 and draw film pin 19, wherein balance staff 18 is arranged on minute below of kind of plate 12, and forms matched in clearance with minute lower surface of kind of plate 12.Be provided with through hole perpendicular to axis on the balance staff 18, the position of through hole is corresponding with the position of seed distributing hole; Draw film pin 19 and be fixed on a side of through hole perpendicular to axis.

Need to prove that for being arranged on seed leaking hole and the seed distributing hole of Lou planting on plate 11 and minute kind of the plate 12, its distribution can be arranges more, and interlaced between adjacent two rows in the sowing mechanism.

By each related in the utility model mechanism's corresponding construction is described, existing drive connection between each mechanism is done further elaborates, and be specific as follows:

Such as Fig. 3 or shown in Figure 4, the transmission mechanism that relates in the utility model has corresponding drive connection more separately take drive unit as active force.Pass through walking endless chain transmission 20 in the utility model between drive unit and the road wheel 6; Drive unit and sowing mechanism are by power transmission shaft chain transmission 22; Need to should carry out with the sowing mechanism locking phase owing to draw film mechanism, stroke film transmission mechanism relies on the sowing transmission mechanism jointly to finish between film mechanism and the drive unit so draw; Pass through film transfer roller chain transmission 30 between film-covering mechanism and the drive unit.Rotating shaft related in above-mentioned each transmission mechanism is parallel mutually.

At first, for road wheel 6, realize the walking of whole device between the power take-off of engine 8 and the road wheel 6 by walking endless chain transmission 20.Road wheel 6 is installed on the frame 9, and the walking of frame 9 relies on drive unit and road wheel 6 to drive fully.As can be seen from Figure 1, road wheel 6 is arranged on an end of horizontal tray in the utility model, defines the front end that this end is horizontal tray.

Secondly, for sowing mechanism, be provided with cam 24 mechanisms on the seed board in the sowing mechanism, these cam 24 mechanisms comprise as the disc cam 24 of driving link with as the roller 23 of driven member, the wheel shaft 31 of disc cam 24 is fixed on the horizontal supporting plate by bearing, shares a rotating shaft with power transmission shaft chain transmission 22.Roller 23 wheel shafts then are fixedly connected with leakage kind of a plate 11.By the elastic recovery part is set, be that the outer circumference surface of roller 23 and disc cam 24 remains that the face face offsets between roller 23 and the disc cam 24.This shows that when disc cam 24 rotated, disc cam 24 can and then drive by effect roller 23 and leak kind of plate 11 and move forward and backward at direction of travel, the size of displacement then is to be determined by the lift of cam.When cam 24 mechanisms carry out rotation work, owing to leak the displacement of kind of plate 11, and then drive seed leaking hole and seed distributing hole and do the staggered-reciprocating motion of aliging.

Again, for drawing film mechanism, the rotation because a stroke film mechanism need to work asynchronously with sowing mechanism also needs to move back and forth so draw a film mechanism.In the rotating shaft of disc cam 24, coaxial a thumb wheel 25 is set, this thumb wheel 25 is provided with finger 26 at its end face.One end of balance staff 18 corresponding thumb wheels 25 is provided with escapement 28, is fixed with swing arm 27 on the excircle of escapement 28.Swing arm 27 can be overlapped on the finger 26.When thumb wheel 25 rotated, the finger 26 on the thumb wheel 25 can be raised the swing arm 27 on the balance staff 18 gradually, until finger 26 separates with swing arm 27.In order to make balance staff 18 can reply as soon as possible the disposal state, be fixed by socket torsion spring on the balance staff 18, be used for balance staff 18 and reset, for balance staff 18 can accurately be resetted, so balance staff 18 is provided with spacer pin, a side of spacer pin can not reset excessively balance staff 18 by offseting with minute kind of a plate 12.Need to prove, the original state of balance staff 18, be the spacer pin that arranges on the balance staff and torsion spring under acting in conjunction, the through hole on the balance staff 18 is staggered with the seed distributing hole on minute kind of the plate 12, and seed distributing hole is stopped up by the sidewall of balance staff 18; When balance staff 18 rotated along with raising of swing arm 27, the film pin of drawing on the balance staff was scratched the opening of a strip with film, and the through hole on the balance staff 18 connects gradually with through hole on minute kind of the plate 12 simultaneously.In whole process, draw a film pin 19 and rotate along with the rotation of balance staff 18, reply and reply.In addition, because the planting hole that is made of seed leaking hole and seed distributing hole is provided with many rows, so balance staff 18 also needs relative set a plurality of.Transmission between balance staff 18 and the balance staff 18 only need to arrange at the escapement 28 of balance staff 18 same ends the synchronous rotation that connecting rod 29 mechanisms can realize balance staff 18.

At last, for film-covering mechanism, pointing out among the described embodiment two before, film is output from film roll 5, through being positioned at the below film supporting plate 13 of drawing film mechanism, by the stable conveying of film conveying roller 14, enter at last between pressing wheel 16 and the ground, realize pasting of film.Wherein film conveying roller 14 is in transmission connection by the wheel shaft of transmission mechanism and disc cam 24.It is pointed out that because a stroke film mechanism can move back and forth, its objective is that the film in order to be positioned at its below scratches, so balance staff 18 must be less than drawing film pin 19 length to the distance of film.In order to play guiding function for a stroke film pin 19, the corresponding swinging track of drawing film pin 19 is provided with the bar hole that connects film supporting plate 13 on film supporting plate 13.

As can be seen from Figure 1, the front end of frame 9 is provided with handrail 4, and handrail is respectively arranged with clutch handle 1 and Oil Switch on 4.Wherein clutch handle 1 is connected with clutch by clutch cable 3, and Oil Switch 2 is used for the fuel feeding size of control engine 8.The controlled brake force break-make of clutch handle.

The course of work of the present utility model is:

The power access failure, when sowing mechanism still is in initial position with a stroke film mechanism, leaking kind of plate 11 aligns with minute kind of a plate 12, divide kind of plate 12 staggered with the through hole on the balance staff 18, divide the lower end outlet of kind of plate 12 blocked, seed in the seed-box 10 can enter minute kind of a plate 12 through leaking kind of a plate 11 at this moment, owing to minute pore size of kind of plate 12, so can only hold 1～2 seed.

After power is connected, road wheel 6 begins to drive frame 9 walkings, because the rotation of cam 24 mechanisms, leaking kind of plate 11 can and divide 12 dislocation of kind of plate (to be provided with elastic seal ring 17 owing to leak to plant between plate 11 and minute kind of the plate 12, so leaking kind of plate 11 can not damage with dividing kind of a plate 12 can bear displacement among a small circle), this moment, seed leaking hole and seed distributing hole can produce dislocation simultaneously, balance staff 18 begins to rotate, through hole is alignd gradually with minute kind of a plate 12, in through hole and process that minute kind of plate 12 finally aligns, leak kind of plate 11 and minute kind of plate 12 and be in all the time misalignment position under the effect of high circular arc at cam, 1～2 contained seed can pass through the through hole landing in minute kind of the plate 12.Because drawing film pin 19 swings synchronously with balance staff 18, can film be scratched for seed so draw film pin 19 again, guide the film of seed by breakage to drop in the soil.

When balance staff 18 turned to extreme position, the swing arm 27 on the balance staff 18 was supported by the finger 26 on the thumb wheel 25, so balance staff 18 resets by torsion spring, balance staff 18 has been got back to again initial position, and cam transfers low level to simultaneously, made kind of plate plant a plate hole and again align with dividing with Louing.For sowing is next time prepared.

Pressing wheel 16 can in the process of road wheel 6 walkings, overlay on thin film on the ground that falls into seed.

The seeding process of whole sowing, overlay film, rupture of membranes finishes.

As shown in Figure 5, the seed ground of dropping is actual herein is the fluted native railway carriage or compartment of both sides tool, and pressing wheel 16 advances along the groove on both sides, native railway carriage or compartment all the time, carries out simultaneously the gland of film.The purpose that both sides, soil railway carriage or compartment arrange groove is that when watering for seed, the current of pouring water move towards the gathering of guiding and pouring water, guarantee the required moisture of seed growth with this.

It is pointed out that in the utility model and draw the shape why film pin 19 adopts pin, is that the fragmentation of film is a seam after seeing that because of a stroke film pin 19 film scratches.Fall into the soil when drawing film pin 19 guiding seeds, draw film pin 19 and pack up when returning to initial position, the breakage on the film can close up automatically.With the film that such form is scratched, not only the air ventilation for seed provides sufficient condition, and can not make the directly expedite residing zone of seed that enters of aqueous water because of the factor such as rain, and can prevent that sparrow etc. from eating up seed simultaneously.For the growth of seed provides stable environment and has ensured fully.

Only be preferred embodiment of the present utility model below, should be pointed out that above-mentioned preferred embodiment should not be considered as restriction of the present utility model, protection domain of the present utility model should be as the criterion with the claim limited range.For those skilled in the art, within not breaking away from spirit and scope of the present utility model, can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims

1. mulch sowing device, comprise the running gear that is arranged on the frame, this running gear comprises drive unit and the road wheel that is in transmission connection, running gear drives the frame walking, it is characterized in that: described frame comprises horizontal supporting plate, is provided with sowing mechanism and film-covering mechanism on this horizontal supporting plate; Described sowing mechanism comprises seed-box and seed board group, the lower surface of seed board group and described horizontal supporting plate are fixed, the seed board group is provided with the planting hole that connects the upper and lower plates face, this planting hole is positioned at the eyelet of lower face less than the eyelet of upper face, described seed-box is arranged on the upper face of seed board group, and the discharging opening of seed-box is corresponding with planting hole; Described film-covering mechanism comprises film roll and pressing wheel, and the excircle of pressing wheel contacts with ground; Be connected by film between described film roll and the pressing wheel, the film on the film roll covers on the ground by pressing wheel, forms angle between the film between film roll and the pressing wheel and the ground; Described pressing wheel is positioned at the end of frame direction of travel, and described planting hole is positioned at before the pressing wheel press mold, and the seed in the seed-box drops behind ground by planting hole, and film is covered on the seed-bearing ground by pressing wheel.

2. mulch sowing device as claimed in claim 1 is characterized in that: described seed board group comprises leakage kind plate setting up and down and minute kind of a plate, and minute kind of plate and described horizontal supporting plate are fixed; Leak kind of a plate and be provided with seed leaking hole, minute kind of a plate is provided with seed distributing hole, and the corresponding perforation with seed distributing hole of seed leaking hole arranges and consists of described planting hole, and the aperture of seed leaking hole is greater than the aperture of seed distributing hole; Hole Zhou Chu between seed leaking hole and the seed distributing hole is provided with elastic seal ring; Described leakage kind plate is provided with gathering sill, and the gathering sill direction is consistent with direction of travel, is fixed with guide finger on the described minute kind plate, and guide finger is plugged on and forms matched in clearance in the gathering sill; Be connected by cam mechanism between described leakage kind plate and the drive unit, leak kind of plate and can do the translation reciprocating motion with respect to minute kind of a plate by cam mechanism, translational movement determined by the lift of cam, and this translational movement is greater than the aperture of seed leaking hole, that seed leaking hole and seed distributing hole are done is staggered-and the reciprocating motion of aliging.

3. mulch sowing device as claimed in claim 2, it is characterized in that: described cam mechanism comprises as the disc cam of driving link with as the roller of driven member, the wheel shaft of described disc cam is fixed on the described horizontal supporting plate, is connected by transmission mechanism between disc cam and the drive unit; The wheel shaft of roller then is fixedly connected with leaking kind of a plate, remains that by the elastic recovery part is set the face face offsets between roller and the disc cam.

4. mulch sowing device as claimed in claim 1, it is characterized in that: described film roll and pressing wheel are separately positioned on the both sides of sowing mechanism, and film is entered between pressing wheel and the ground by the below of sowing mechanism; Be provided with between described sowing mechanism and the film and draw film mechanism, this stroke film mechanism comprises balance staff and draws the film pin, wherein balance staff is arranged on the below of seed board group, and form matched in clearance with the lower surface of seed board group, be provided with through hole perpendicular to axis on the balance staff, the position of through hole is corresponding with the position of described planting hole, and described stroke of film pin is fixed on a side of through hole perpendicular to axis; Balance staff is provided with reciprocator, and this reciprocator and described drive unit connecting band movable pendulum axle move reciprocatingly, and described stroke of film pin and balance staff rotate synchronously; Described balance staff, is drawn a film pin and film can be scratched and form rectangular opening less than the length of drawing the film pin to the distance of film; When balance staff was positioned at initial position, the sidewall of balance staff stopped up seed distributing hole; When balance staff rotated, the through hole on the balance staff connected with seed distributing hole gradually.

5. mulch sowing device as claimed in claim 4, it is characterized in that: described reciprocator comprises the thumb wheel that is connected with drive unit, the end face of thumb wheel is provided with finger, the termination of balance staff is provided with escapement, be fixed with swing arm on the excircle of escapement, described swing arm is overlapped on the finger, and balance staff is provided with spacer pin and has been fixed by socket torsion spring; Balance staff is positioned at the initial position that sidewall stops up seed distributing hole under the effect of spacer pin and torsion spring; When thumb wheel rotated, the finger on the thumb wheel was raised swing arm, and balance staff begins to rotate by the drive of escapement, and the through hole on the balance staff connects with planting hole gradually, until swing arm separates with finger, balance staff returns to initial position by torsion spring.

6. mulch sowing device as claimed in claim 5 is characterized in that: described balance staff is two or more, and is parallel to each other, and connects by linkage between the balance staff and realizes rotating synchronously.

7. mulch sowing device as claimed in claim 1 is characterized in that: also comprise the film supporting plate in the described film-covering mechanism, this film supporting plate is arranged on the horizontal tray of described seed board group below, is used for support film.

8. mulch sowing device as claimed in claim 7, it is characterized in that: described film supporting plate is provided with the bar hole of up/down perforation, and the position correspondence of this bar hole is arranged on the swinging track of described stroke of film pin.

9. mulch sowing device as claimed in claim 7, it is characterized in that: be provided with film conveying roller between described film supporting plate and the pressing wheel, this film conveying roller is connected with drive unit by transmission mechanism.

10. mulch sowing device as claimed in claim 1, it is characterized in that: described drive unit comprises the engine retarder that is provided with clutch, the front end of described frame direction of travel is provided with the handrail handle, handrail is being provided with clutch switch, this clutch switch is connected with clutch by clutch cable, and this handrail is the upper Oil Switch that also is provided with.