CN210610287U

CN210610287U - Transmission mechanism and seeding device

Info

Publication number: CN210610287U
Application number: CN201921342861.2U
Authority: CN
Inventors: 孙同梅
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-18
Filing date: 2019-08-18
Publication date: 2020-05-26
Anticipated expiration: 2029-08-18

Abstract

The utility model relates to a drive mechanism and seeder belongs to agricultural mechanical equipment technical field. The device comprises an intermittent driving mechanism, wherein the intermittent driving mechanism comprises a driving part and a driven part driven by the driving part; the driving part comprises a driving shaft, the driven part comprises a driven shaft, one end of the driving shaft is provided with a driving wheel, a cam is arranged on the driving wheel, and one side of the driving wheel is matched with a driven wheel arranged on the driven shaft; the driven shaft consists of a fixed half shaft and a movable half shaft which are mutually independent and have coincident axes; the driven wheel is arranged on the fixed half shaft; the movable half shaft is movably supported by the limiting plate, can axially move relative to the limiting plate, and is provided with a baffle and a spring; one side surface of the baffle sheet is attached to the cam. The utility model discloses a cam drive push rod intermittent type formula is pressed on the separation blade, makes the separation blade stall to it is quick static to drive the activity semi-axis, realizes the accurate unloading of kind material or fertilizer and stops the unloading.

Description

Transmission mechanism and seeding device

Technical Field

The utility model relates to the technical field of agricultural machinery, specifically speaking relates to a drive mechanism and seeder.

Background

The seeder is used for uniformly seeding crop seeds into seed ditches with a certain depth at a certain seeding rate or plant hole spacing, covering with a proper amount of fine wet soil, and properly compacting to provide good conditions for seed germination, so as to achieve the purposes of high yield, stability, improvement of labor productivity of seeding operation and reduction of labor intensity of users.

The existing seeder mainly comprises a main frame, traveling wheels, a ditching device, a seed metering device, a transmission mechanism, a soil covering and pressing device and the like, and when the seeder is used, continuous seeding or fertilization is often performed, so that the seeding or fertilization is large in stacking density along the arrangement direction, seeds are wasted, plants are easily arranged too densely, and ventilation is affected.

Application number is 2015200360685 patent, the publication date of this patent is 2015 year 6 month 24 days, it discloses a novel corn drill, which comprises a frame, kind fill, transmission, the device of sowing, ditching earthing device, be fixed with the handle in the frame, kind fill is installed in the frame, kind fill installs the dish in the lower part, it is relative with the hole on the dish to sow the pipe, the lower extreme of sowing pipe is fixed with the ditching plough and covers the native plough, transmission includes sprocket and chain, worm wheel and worm, intermittent type gear and gear wheel, the wheel passes through transmission and gives power transmission to kind sprocket, drive the scraper blade motion by kind sprocket, thereby drive the seed motion. The utility model discloses a technical scheme can realize that the seeding distance is even, and the seeding is difficult to the multicast, is difficult for causing the waste of seed, is favorable to beneficial effect such as the growth of maize.

However, the technical scheme disclosed by the utility model has the following defects: when the intermittent gear is disengaged from the large gear, the large gear and the mechanism driven by the large gear are still in a free state and often still act under the action of inertia, so that intermittent seeding, sporadic seeding and continuous arrangement of grown plants are caused, and therefore the technical scheme does not well solve the problem that the plants are arranged too densely to influence ventilation.

SUMMERY OF THE UTILITY MODEL

1. Problems to be solved

To among the prior art, the interval adjustment effect of seeding or fertilization is unstable, produces the problem of sporadic seeding easily, the utility model provides a drive mechanism and seeder. The device adopts an axial driving mode of the cam, realizes intermittent power transmission, realizes quick start and stop of a transmission process by utilizing the friction force between the cam and the blocking piece, realizes accurate intermittent seeding, does not have sporadic seeding and saves seeds.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

A transmission mechanism is an intermittent driving mechanism and comprises a base plate, a driving part and a driven part driven by the driving part; the driving part comprises a driving shaft, the driven part comprises a driven shaft, and the driving shaft and the driven shaft are both arranged on the substrate; one end of the driving shaft is provided with a driving wheel which is meshed with a driven wheel arranged on the driven shaft, and one side of the driving wheel is provided with a cam;

the driven shaft is composed of a fixed half shaft and a movable half shaft which are mutually independent and have coincident axes; one end of the movable half shaft is connected with one end of the fixed half shaft;

the driven wheel is arranged on the fixed half shaft;

the movable half shaft penetrates through the limiting plate and is limited by the limiting plate, and the movable half shaft can axially move relative to the limiting plate;

the movable half shaft is provided with a baffle and a spring; the blocking piece is positioned on one side of the cam, which is far away from the base plate, and the blocking piece is contacted with one end face, which is close to the blocking piece, of the cam; the spring is positioned between the baffle plate and the limiting plate;

the cam drives the blocking piece, the blocking piece extrudes the spring, and under the dual actions of the blocking piece and the spring, the blocking piece drives the movable half shaft to reciprocate relative to the fixed half shaft.

Preferably, the cam is an end cam;

the blocking piece is contacted with the cam through the push rod; the cam pushes the push rod to move, and the push rod pushes the blocking piece to enable the blocking piece to reciprocate relative to the fixed half shaft.

Preferably, a roller is arranged at the contact position of the push rod and the cam, so that the push rod and the cam are in rolling contact; the cam pushes a push rod through the roller.

Preferably, the push rod is U-shaped, and the U-shaped push rod is sleeved outside the movable half shaft.

Preferably, the ends of the fixed half shaft and the movable half shaft which are connected by adopting a tooth structure to mesh with each other.

Preferably, the tooth structure on the fixed half shaft is a tooth inclined along the circumferential direction, and the inclined direction of the tooth is opposite to the rotating direction of the fixed half shaft; suitably, the direction of inclination of the tooth structure of the movable half shaft is the same as the direction of rotation of the fixed half shaft.

Preferably, the driven parts are provided with two sets and are respectively and correspondingly positioned at two opposite sides of the driving part;

the material shifting wheel is installed at the free end of the movable half shaft, and a plurality of shifting pieces which extend along the radial direction of the material shifting wheel are arranged on the periphery of the material shifting wheel.

A seeding device adopts the transmission mechanism.

A method of seeding comprising the steps of:

s1, pushing the movable half shaft: the driving wheel drives the driven wheel positioned on one side of the driving wheel to rotate, the cam driven by the driving wheel rotates, and the cam pushes the blocking piece and the movable semi-axis to move away from one side of the cam;

s2, stalling of the movable half shaft: the cam presses on the blocking piece to compress the spring positioned between the limiting plate and the blocking piece, the movable half shaft is separated from the fixed half shaft, and the movable half shaft stalls;

s3, stopping seeding: after the movable half shaft stalls, the cylindrical structure installed on the movable half shaft blocks the material above the position of transferring the center by using the cylindrical structure, and the blanking is stopped:

s4, speed setting of the movable half shaft: after the pressure between the cam and the push rod is unloaded, under the reset action of the spring, the blocking piece pushed by the spring moves to one side close to the base plate, and a movable half shaft fixedly connected with the blocking piece moves together with the blocking piece;

s5, continuously sowing: after the movable half shaft is accelerated, the cylindrical structure at the side is driven to reset, and materials accumulated in the material conveying channel continuously pass through and fall into furrows to realize seeding;

s6, repeating interval seeding: repeating the steps to realize the spaced sowing in the same furrow.

A seeding method is characterized in that two sets of driven wheel transmission systems are arranged and are respectively positioned on two sides of a driving wheel; the operation steps are as follows:

s1, pushing the first side movable half shaft: the driving wheel drives the driven wheels respectively positioned at the two sides of the driving wheel to rotate simultaneously, the cam driven by the driving wheel rotates, the cam pushes the push rod at the first side to move towards one side far away from the cam, and the push rod is gradually pressed on the blocking piece in the moving process, so that the blocking piece drives the movable semi-axis to move towards one side far away from the cam;

s2, stalling of the first side movable half shaft: the push rod presses the blocking piece to a rotation stop state by utilizing the gradually improved friction force between the blocking piece and the push rod, and simultaneously compresses the spring between the limiting plate and the blocking piece, so that the movable half shaft is separated from the fixed half shaft and is pulled to the rotation stop state by the blocking piece;

s3, stopping seeding on the first side: after the first side activity semi-axis stall, the kickoff wheel stall of installing on the activity semi-axis, the material in this side workbin is piled up and is being used the kickoff wheel to transmit the position top of maincenter, stops the unloading:

s4, speed setting of the second side movable half shaft: after the pressure between the cam and the push rod at the second side is unloaded, under the reset action of the spring at the second side, the spring pushes the blocking piece at the second side to move towards one side close to the base plate, and a second side movable half shaft fixedly connected with the blocking piece is also moved together;

s5, continuously sowing seeds on the second side: after the speed of the movable half shaft on the second side is increased, the material shifting wheel on the side is driven to rotate, and materials accumulated in the material conveying channel are transferred by the material shifting wheel and fall into furrows to realize seeding; in the process, the feeding channels are respectively positioned at two sides of the driving shaft, and only one side is always used for feeding;

s6, sowing at repeated alternate intervals: repeating the steps to realize that only one side of two adjacent furrows is always sown, the other side is paused, and then the sowing is alternated; the obtained blanking position is in a shape like a Chinese character 'pin'.

3. Advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses a cam drive separation blade intermittent type formula is kept away from or is close to fixed semi-axis, realizes that the meshing of activity semi-axis and fixed semi-axis breaks away from. In the process, the movable half shaft moves axially to move the material stirring wheel away from the material conveying channel, the cylindrical structure which is positioned on one side of the material stirring wheel close to the substrate and on the movable half shaft is used for replacing the material stirring wheel to seal a feed opening, so that the intermittent seeding or fertilizing process is realized, accurate seeding or fertilizer feeding and stopping feeding are realized, material resources are saved, and the effect of spaced planting is ensured.

(2) The utility model discloses a cam drive push rod intermittent type formula is pressed on the separation blade, makes separation blade intermittent type formula axial displacement, further promotes activity semi-axis axial displacement, realizes that the meshing of activity semi-axis and fixed semi-axis breaks away from. In the process, the push rod is pressed on the rotating baffle, so that the baffle stops rotating, the movable half shaft is driven to be fast static, the intermittent seeding or fertilizing process is realized, accurate seeding or fertilizer feeding and stopping are realized, material resources are saved, and the effect of interval planting is ensured.

(3) The utility model discloses a helical gear structure is as the connection structure of fixed semi-axis and activity semi-axis, begins to contact or break away from the meshing in-process with activity semi-axis when fixed semi-axis, because the incline direction and the fixed semi-axis drive activity semi-axis pivoted opposite direction of tooth structure, consequently initial contact process, perhaps break away from the process more smooth-going, be difficult to appear the situation of the mutual striking of prong between the two parts.

(4) The utility model discloses a driving shaft can adopt chain drive or gear drive's mode drive by agricultural machine, and the power supply moment of torsion is big, and when the workbin size is longer, can set gradually a plurality of stirring wheels (for example have the runner of "rice font" plectrum) on the same root activity semi-axis, and great moment of torsion can satisfy the user demand of above-mentioned structure, plays many ridges of a trip and fertilizes or the effect of sowing, and the planting interval in the adjacent furrow is confirmed by mechanical dimension in advance, and planting pattern is effectual the accuse.

(5) The utility model discloses a seeder adopts two driven wheel rotations of an action wheel intermittent type drive, and then realizes the material intermittent type release in proper order in two workbins, can plant according to "article font" arrangement structure, and "article font" arrangement structure makes the field air permeability good, and vegetation is more firm, more is difficult to the plant diseases and insect pests, has satisfied the demand of current mainstream planting mode ("article font" is planted and is cultivated the plant).

(6) The utility model discloses can also be used to fertilize. At present, because soil hardens seriously, a lot of farming districts are promoting the comprehensive use of chemical fertilizer and bacterial manure, utilize fertilizers such as bacterial manure to improve the soil condition of hardening that arouses by single application chemical fertilizer, the utility model discloses can do not control the crisscross interval of two kinds of fertilizers with chemical fertilizer and bacterial manure through the workbin discharge opening of difference respectively with the help of two sets of driven parts and use, played the even reasonable broadcast of fertilizer and executed.

Drawings

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

fig. 2 is a perspective view of the other side of the utility model;

fig. 3 is a top view of the present invention;

FIG. 4 is a schematic view of the fitting relationship between the fixed half shaft and the movable half shaft of the present invention;

FIG. 5 is a schematic view showing the relationship between the material conveying passage and the material discharge tray;

fig. 6 is a side view of the discharging tray of the present invention.

In the figure:

1. an active part; 2. a driven part; 3. a drive shaft; 4. a driven shaft; 5. a driving wheel; 6. a cam;

7. a driven wheel; 71. fixing the half shaft; 72. a movable half shaft;

8. a limiting plate; 9. a baffle plate; 10. a spring; 11. a substrate; 12. a support member; 13. a push rod; 14. a roller; 15. a tooth structure;

16. a material poking wheel; 161. a shifting sheet;

17. a material box; 171. material holes;

18. a material conveying channel; 19. a bearing seat; 20. a sprocket; 21. a cylindrical structure; 22. discharging a material tray; 23. and (7) a blanking pipeline.

Detailed Description

In order to make the utility model realize that the technical means, the creation characteristics, the achievement purpose and the efficacy are easy to be understood, the utility model is further explained by combining the embodiment.

Example 1

As shown in fig. 1 to 3, a transmission mechanism includes a base plate 11 and an intermittent drive mechanism including a driving part 1 and a driven part 2 driven by the driving part 1. Specifically, the driving section 1 includes a driving shaft 3, and the driven section 2 includes a driven shaft 4. Two bearing seats 19 are mounted on the base plate 11, and the driving shaft 3 and the driven shaft 4 respectively pass through the corresponding bearing seats 19 and are respectively supported by the bearing seats 19 in a rolling manner.

A driving wheel 5 is installed at one end of the driving shaft 3, a cam 6 is arranged on the driving wheel 5, and the cam 6 is provided with an end face cam and can intermittently and smoothly push the driven part 2 to move. And a driven wheel 7 arranged on the driven shaft 4 is matched with one side of the driving wheel 5, and in the embodiment, the driving wheel 5 is in meshing transmission with the driven wheel 7 in a gear matching mode.

The driven shaft 4 is composed of a fixed half shaft 71 and a movable half shaft 72 which are independent from each other, and the axes of the fixed half shaft 71 and the movable half shaft 72 are coincident with each other and have the same diameter, so that the fixed half shaft 71 can normally drive the movable half shaft 71. The fixed axle shaft 71 passes through a bearing seat 19 on the base plate 11 and is only rotatable relative to the base plate 11 and is not axially movable. One end of the movable half shaft and one end of the fixed half shaft 71 are meshed with each other by adopting a tooth structure 15. The driven wheel 7 is fixedly sleeved on the fixed half shaft 71, and when the driving wheel 5 is used, the driven wheel 7 drives the fixed half shaft 71 to continuously rotate. In this embodiment, the backup pad that supports activity semi-axis 72 and the function of carrying out spacing limiting plate 8 to activity semi-axis 72 concentrate and realize by limiting plate 8, and limiting plate 8 supports in spacing promptly, when supporting, requires to be equipped with the through-hole that activity semi-axis 71 of being convenient for run through on the limiting plate 8, and installs linear bearing in the through-hole, linear bearing's internal diameter and activity semi-axis 71's internal diameter looks adaptation. Under the condition that the movable half shaft 72 can axially move relative to the limiting plate 8, the baffle 9 and the spring 10 are arranged on the movable half shaft 72, and the baffle 9 is stably arranged on the movable half shaft 72 in a detachable mode or an integrated mode and serves as a specific part for controlling the action of the movable half shaft 72 through the spring 10 and the cam. To realize the control of the cam 6 to the movable half shaft 72, in this embodiment, one side surface of the blocking piece 9 is attached to the cam 6, so that the blocking piece 9 is driven by the cam 6 to reciprocate periodically, the spring 10 is located between the blocking piece 9 and the limiting plate 8, and in the process of reciprocating the blocking piece, the limiting plate 8 fixedly connected with the fixed half shaft 71 is driven to move by extruding the spring 10 in a reciprocating manner, thereby realizing the purpose of controlling the combination and separation of the movable half shaft 72 and the fixed half shaft 71.

In order to improve the power transmission effect of the fixed half shaft 71 and the movable half shaft 72, the following technical scheme is adopted in the embodiment:

under the natural extension state of the spring 10, the cam 6 drives the baffle 9 to extrude the spring 10, and the spring 10 pushes the movable half shaft 72 to be tightly attached to the fixed half shaft 71 based on the limiting plate 8.

As shown in fig. 4, the fixed half shaft 71 and the movable half shaft 72 are engaged with each other by a tooth structure 15 at their respective ends, wherein the number of teeth used in this embodiment is 7, and the diameter of the tooth structure 15 is 25 mm.

In order to avoid excessive impact at the moment of relative rotational contact of tooth crest structures on two components, the technical content of the present embodiment is to provide the tooth structure 15 on the fixed half shaft 71 as a tooth inclined in the circumferential direction, the direction of inclination of the tooth being opposite to the rotational direction of the fixed half shaft 71; suitably, the tooth formation 15 of the movable half-shaft 72 is inclined in the same direction as the direction of rotation of the fixed half-shaft 71. Because the fixed half shaft is used as a driving part, when the fixed half shaft 71 is in contact with the movable half shaft 72, the inclined surfaces of the tooth structures 15 on the two parts are in contact with each other, and the impact force of the mutual contact of the two inclined surfaces with larger inclination angles along the axis is greatly reduced relative to the contact impact of the tooth side surfaces with smaller inclination angles along the axis, so that the damage to the equipment is avoided, and the stable state and the long service life of the equipment are ensured in the use process. One side of the tooth structure 15 is inclined at an angle of 50 deg. to the axis of the tooth structure 15 and the other side is inclined at an angle of 15 deg. to the axis of the tooth structure 15. The too small inclination angle of the tooth structure 15 causes the impact among tooth tips to be aggravated within the rotating speed range of the material poking wheel of the existing seeder; otherwise, the power transmission is insufficient due to the overlarge inclination angle, and the slip phenomenon is easily generated between the movable half shaft and the fixed half shaft.

As a structure for cooperating with the intermittent drive mechanism, a hopper 17 is mounted on the base plate. The feed box 17 is located above the intermittent driving mechanism, a material hole 171 is formed in the bottom of the feed box 17, the material hole 171 is located above the material stirring wheel 16, and a material conveying channel 18 is connected below the material hole 171 and used for conveying materials in the feed box 17 to the rear of a plough connected with the feed box in an external mode. Specifically, the other end of the movable half shaft 72 is provided with a material shifting wheel 16, the periphery of the material shifting wheel 16 is provided with a plurality of shifting sheets 161 which extend along the radial direction of the material shifting wheel 16, so that the side view of the material shifting wheel 16 is similar to a Chinese character mi, and one side of the material shifting wheel 16 close to the base plate 11 is provided with a cylindrical structure with the same diameter as that of the material shifting wheel 16. The movable half shaft 72 penetrates through the material conveying channel 18, and the material stirring wheel 16 is located in the material conveying channel 18 and used for rotating and stirring materials. When the material shifting wheel 16 does not rotate, the material is stacked between two adjacent shifting pieces 161 to form a short stacking, and when the material shifting wheel 16 axially moves relative to the material conveying channel, so that the material is stacked at the cylindrical structure after the cylindrical structure replaces the position of the material shifting wheel 16.

In operation, the primary pulley 1 rotates, driving the fixed half-shaft with the secondary pulley 2 to rotate 71. The cam 6 on the driving wheel 1 drives the blocking piece 9, so that the blocking piece 9 rapidly compresses the spring 10, the movable half shaft 72 is separated from the fixed half shaft 71, the movable half shaft 72 axially moves, the cylindrical structure is blocked on the material conveying channel 18, and the seeding or fertilizer feeding is ensured to be as little as possible in the intermittent stage.

A seeder adopts above-mentioned actuating mechanism.

The equipment mechanism of the seeder further comprises: a material box 17 is arranged above the intermittent driving mechanism, a material hole 171 is arranged at the bottom of the material box 17, a material conveying channel 18 is connected below the material hole 171, and the material stirring wheel 16 is positioned in the material conveying channel 18 and used for rotating and stirring materials.

A sowing method comprises the following steps:

s5, continuously sowing: after the movable half shaft is accelerated, the cylindrical structure is reset, and materials accumulated in the material conveying channel are transferred and pass through and fall into furrows to realize seeding;

The parts not mentioned in the utility model can be realized by adopting or using the prior art for reference.

Example 2

On the basis that the basic technical scheme of the embodiment 1 is unchanged, the driven part 2 is provided with two sets and is respectively and correspondingly positioned at two opposite sides of the driving part 1. When the driving wheel 1 rotates, the driving wheel 1 can alternately drive the driven parts 2 on two sides to respectively act, and finally the control of the blanking process of the two material boxes by the driven parts is realized.

The supporting member 12 is an L-shaped structure, that is, the supporting member in embodiment 1 (as one part of the supporting member 12 in this embodiment) and the limiting plate (as two parts of the supporting member 12 in this embodiment, and one part and two parts are perpendicular to each other) are included, and the push rod 13 is hinged on the supporting member 12. Specifically, for the control of the movable half shaft 72, the following technical solutions are further adopted in the present embodiment:

and a support piece 12 is arranged on the base plate 11, one part of the support piece 12 is vertically and fixedly connected with the base plate 11, and the other part of the support piece 12 is used as a limit plate 8 for supporting and limiting the movable half shaft 72. A cylinder structure 21 is arranged in the middle of the support 12, by means of which cylinder structure 21 the support 12 is articulated with a push rod 13. The push rod 13 is of a frame structure, the push rod 13 is sleeved outside the movable half shaft 72, the push rod 13 is located on one side, close to the fixed half shaft 71, of the blocking piece 9, and the upper portion and the lower portion of the push rod 13 are in contact with the blocking piece 9, so that the contact area of the push rod 13 to the blocking piece 9 is increased, and the pressing control effect on the blocking piece 9 is improved. One end of the push rod 13 close to the cam extends to one side of the cam 6 close to the spring 10, so that the cam 6 contacts and drives the push rod 13, the push rod 13 pushes the baffle 9 to act, and the push rod 13 rapidly presses the rotating baffle 9.

In order to reduce the friction between the push rod 13 and the cam 6, a roller 14 is provided at an end of the push rod 13 that contacts the cam 6.

For the application of the above mechanism:

because during the fertilizer application, chemical fertilizer and bacterial manure need be applyed simultaneously, the fertilizer can guarantee to scatter evenly of fertilizer under the alternating intermittent type like this, avoids causing soil hardening after the chemical fertilizer is concentrated, also avoids bacterial manure to scatter unevenly and influences plant growth.

When seeding, due to the adoption of the alternate intermittent seeding mode, seeding patterns in two adjacent furrows can be completely staggered, the Chinese character ' pin ' -shaped ' planting layout is finally realized, and the current planting requirements are met.

A sowing method comprises the following steps:

Example 3

On the basis that the basic technical scheme of the embodiment 1 is kept unchanged, the chain wheel 20 is installed on the fixed half shaft 71, the other set of driven parts is arranged on the base plate 11, the chain wheel 20 is used as a driving transmission part to drive the other set of driven parts to move, and the feed boxes are installed on the other set of newly-added driven parts in a matched mode, so that the common fertilization or seeding of multiple sets of feed boxes is realized. Specifically, in this embodiment, a fertilizer is placed in one material box, and a bacterial fertilizer is placed in the other material box, so that a further uniform fertilizer spreading is achieved.

Of course, it is also possible to provide more driven parts and bins based on the above principle, including the simultaneous sowing of seeds with bins.

Example 4

As shown in fig. 5, on the basis that the basic technical solution of embodiment 1 remains unchanged, in this embodiment, a plough share for making furrows is fixedly installed at the lower portion of the bin 17, the lower end of the material conveying channel 18 extends to the rear side of the plough share, and a seeding disc 22 is movably communicated with the lower end of the material conveying channel 18, specifically, the lower end of the material conveying channel 18 is movably sleeved on the side end face of the seeding disc 22, so that the seeding disc 22 can rotate relative to the material conveying channel 18, but cannot axially move relative to the material conveying channel 18. Referring to fig. 6, the sowing plate 22 is a disc-shaped structure with a cavity, and sowing pipes 23 are uniformly distributed around the sowing plate 22 along the circumferential direction of the sowing plate, and the sowing pipes 23 are communicated with the cavity of the sowing plate 22.

When in use, the materials in the material conveying channel 18 enter the sowing tray 22 and are inserted into the soil ditch dug by the ploughshare through the sowing pipes 23 under the action of gravity. The sowing pipe 23 around the sowing disc 22 is in contact with soil, and in the walking process of the device, the soil moving relative to the sowing disc 22 pushes the sowing pipe 23 to rotate, so that sowing is realized. Because the distance between each sowing pipe 23 is constant, the sowing distance is constant, and the standardized planting is favorably realized.

In addition, a belt wheel is installed on the driving shaft, and the belt wheel is connected with an engine power output part of an externally-connected agricultural vehicle and used for receiving and transmitting kinetic energy.

In the description of this patent, it is to be understood that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "front," "back," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of this patent.

In this patent, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, but rather that the principles of the invention are described in the above embodiments and the description, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and these changes and modifications are intended to be included within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A transmission mechanism is an intermittent driving mechanism and comprises a base plate (11), a driving part (1) and a driven part (2) driven by the driving part (1); the driving part (1) comprises a driving shaft (3), the driven part (2) comprises a driven shaft (4), and the driving shaft (3) and the driven shaft (4) are both arranged on the substrate (11); action wheel (5), its characterized in that are installed to the one end of driving shaft (3):

the driving wheel (5) is meshed with a driven wheel (7) arranged on the driven shaft (4), and a cam (6) is arranged on one side of the driving wheel (5);

the driven shaft (4) is composed of a fixed half shaft (71) and a movable half shaft (72) which are mutually independent and have coincident axes; one end of the movable half shaft (72) is connected with one end of the fixed half shaft (71);

the driven wheel (7) is arranged on the fixed half shaft (71);

the movable half shaft (72) penetrates through the limiting plate (8) and is limited by the limiting plate (8), and the movable half shaft (72) can axially move relative to the limiting plate (8);

a baffle plate (9) and a spring (10) are arranged on the movable half shaft (72); the blocking piece (9) is positioned on one side, far away from the base plate (11), of the cam (6), and the blocking piece (9) is in contact with one end face, close to the blocking piece (9), of the cam (6); the spring (10) is positioned between the baffle plate (9) and the limiting plate (8);

the cam (6) drives the blocking piece (9), the blocking piece (9) extrudes the spring (10), and under the dual action of the blocking piece (9) and the spring (10), the blocking piece (9) drives the movable half shaft (72) to reciprocate relative to the fixed half shaft (71).

2. A transmission mechanism as claimed in claim 1, wherein: the cam (6) is an end cam;

the blocking piece (9) is contacted with the cam (6) through a push rod (13); the cam (6) pushes a push rod (13) to move, and the push rod (13) pushes a blocking piece (9) to enable the blocking piece (9) to reciprocate relative to the fixed half shaft (71).

3. A transmission mechanism as claimed in claim 2, wherein: a roller (14) is arranged at the contact position of the push rod (13) and the cam (6) to ensure that the push rod (13) and the cam (6) are in rolling contact; the cam (6) pushes a push rod (13) through the roller (14).

4. A transmission mechanism as claimed in claim 2, wherein: the push rod (13) is U-shaped, and the U-shaped push rod (13) is sleeved outside the movable half shaft (72).

5. A transmission mechanism as claimed in claim 1, wherein: the end parts of the fixed half shaft (71) and the movable half shaft (72) which are connected are mutually meshed by adopting a tooth structure (15) to realize connection.

6. A transmission according to claim 5, wherein: the tooth structure (15) on the fixed half shaft (71) is a tooth inclined along the circumferential direction, and the inclined direction of the tooth is opposite to the rotating direction of the fixed half shaft (71); the tooth structure (15) of the movable half shaft (72) is suitably inclined in the same direction as the direction of rotation of the fixed half shaft (71).

7. A transmission according to any one of claims 1 to 6, wherein: the driven parts (2) are provided with two sets and are respectively and correspondingly positioned at two opposite sides of the driving part (1);

the material shifting wheel (16) is installed at the free end of the movable half shaft (72), and a plurality of shifting pieces (161) which extend along the radial direction of the material shifting wheel (16) are arranged on the periphery of the material shifting wheel (16).

8. A seed planting device, characterized in that: use of a transmission according to any one of claims 1 to 7.