Seeding device capable of automatically adjusting spacing

Abstract

The utility model provides a seeding device capable of automatically adjusting spacing, which relates to the technical field of seeding machines, and is characterized in that two short side walls of a seed containing box are jointly provided with a U-shaped dredging frame in a sliding manner, and the middle parts of three material guide hoses are supported on a bottom side transverse supporting rod of the U-shaped dredging frame in an abutting manner; two longitudinal support positioning shafts are symmetrically welded to one long side wall of the seed containing box, a U-shaped driving frame is jointly slidably mounted on the two longitudinal support positioning shafts through pushing of a spring, and two connecting rods are symmetrically and rotatably connected between the U-shaped driving frame and a U-shaped dredging frame; the whole push frame is jointly composed of two inclined push rods which are symmetrically arranged and transverse supporting handle pipes welded to the tail ends of the two inclined push rods. The front-back sliding threaded sleeve can push and drive the two L-shaped mounting rods on the outer side to oppositely slide left and right, the distance between the three L-shaped mounting rods and the distance between the three furrow ploughs are adjusted, the requirement for cultivation of different distances is met, use is flexible, and application is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of seeders, in particular to a seeding device with automatic spacing adjustment. Background Art

[0002] The wheat seeding device with automatic spacing adjustment is an agricultural equipment, which can conveniently adjust the tillage spacing according to needs during seeding.

[0003] In the existing seeding device, between the seed container on it and the seed discharge pipe installed on the bottom side of the furrow opener, generally there are multiple guide hoses for guiding and feeding the seeds. However, there is generally a lack of a mechanism on the seeding device to dredge the multiple guide hoses, resulting in the need to manually vibrate the multiple guide hoses one by one for cleaning and dredging, which is rather troublesome and inconvenient to operate. And although there are some seeding devices equipped with a mechanism to synchronously dredge the multiple guide hoses, the drive mechanism of the dredging mechanism is not reasonably optimized, resulting in the need to stop the machine to drive the dredging mechanism, additionally occupying the normal production and use time of the seeding device and reducing the production and use efficiency of the seeding device. Summary of the Utility Model

[0004] In view of this, the utility model provides a seeding device with automatic spacing adjustment to solve the problem that the drive of the dredging mechanism requires the machine to stop, additionally occupying the normal production and use time of the seeding device and reducing the production and use efficiency of the seeding device.

[0005] The technical solution proposed by the utility model is: a seeding device with automatic spacing adjustment, specifically including: a main body frame, inside which a seed storage box is welded through, and on one long side pipe of the main body frame, a pushing frame is welded and supported upwardly obliquely;

[0006] On the other long side pipe of the main body frame, three L-shaped mounting rods are arranged and installed, and at the bottom ends of the three L-shaped mounting rods, seed discharge pipes are welded obliquely; on the bottom wall of the seed storage box, three feeding boxes are welded in an array, and between the three feeding boxes and the three seed discharge pipes, guide hoses are connected;

[0007] A U-shaped dredging frame is slidably installed on the two short side walls of the seed box, and the middle parts of the three material guiding hoses are against the bottom cross brace rod of the U-shaped dredging frame; two longitudinal support positioning shafts are symmetrically welded on a long side wall of the seed box, and a U-shaped driving frame is slidably installed on the two longitudinal support positioning shafts through spring pushing, and two connecting rods are symmetrically rotatably connected between the U-shaped driving frame and the U-shaped dredging frame; the push frame as a whole is composed of two symmetrically arranged inclined push rods and cross brace handlebars welded to the tail ends of the two inclined push rods, wherein a guide shaft is welded between the middle and lower positions of the two inclined push rods, and a driving rod is slidably installed on the head ends of the two inclined push rods, and a steel wire rope is connected between the driving rod and the U-shaped driving frame, and the steel wire rope is pulled around the guide shaft.

[0008] Furthermore,

[0009] The head ends of the two longitudinal support side rods of the U-shaped driving frame are symmetrically welded with two transverse support shaft rods, the tail ends of the two connecting rods are rotatably connected to the two transverse support shaft rods, and the tail ends of the two connecting rods are rotatably connected to the upper half of the two vertical support side rods of the U-shaped dredging frame.

[0010] Furthermore,

[0011] The tail end of the steel wire pull rope is fixedly connected with the middle part of the cross brace side rod of the U-shaped driving frame.

[0012] Furthermore,

[0013] Two positioning sleeves are symmetrically welded at the bottom positions of the two short side walls of the seed containing box, and two vertical supporting side rods of the U-shaped dredging frame are correspondingly penetrated and slidably matched with the two positioning sleeves.

[0014] Furthermore,

[0015] Two downwardly inclined support rods are symmetrically welded on a long side tube of the push frame installed on the main frame, and a wheel axle is rotatably installed through the bottom ends of the two inclined support rods, and two wheels are symmetrically mounted at both ends of the wheel axle.

[0016] Furthermore,

[0017] A feeding shaft is rotatably mounted in the middle of the bottom side of the seed box bottom plate, and three feeding rollers are arranged at equal intervals on the feeding shaft, and a circle of feeding teeth is arranged on the outer circumference of the feeding roller;

[0018] The bottom plate of the seed box is provided with three unloading grooves arranged at equal intervals, the three unloading grooves are connected to the three unloading boxes, and the three unloading rollers are arranged in the three unloading grooves;

[0019] The wheel shaft is driven by a chain and a feed shaft.

[0020] Furthermore,

[0021] At the top of a long side pipe of an L-shaped mounting rod installed on the main body frame, two pulling plates with an L-shaped structure are symmetrically welded. The whole seeding device is connected to an external traction machine through the two pulling plates;

[0022] At the first ends of the three seed outlet pipes, furrow openers are threadedly fastened.

[0023] Furthermore,

[0024] On a long side pipe of the main body frame where the L-shaped mounting rod is installed, two T-shaped track bars are symmetrically welded. The first ends of the two outer L-shaped mounting rods are slidably matched with the two T-shaped track bars respectively, and the first end of the middle L-shaped mounting rod is directly threadedly fastened to the middle part of the corresponding long side pipe on the main body frame;

[0025] On the middle position of a long side wall of the seed storage box on the side of the pulling plate, a motor is threadedly fastened. And at the bent part of the middle L-shaped mounting rod, an L-shaped support plate is welded. At the top of the L-shaped support plate, a longitudinal support screw rod is rotatably installed through. The tail end of the longitudinal support screw rod is in shaft connection transmission with the motor shaft;

[0026] A threaded sleeve is screwed and sleeved on the longitudinal support screw rod. Between the threaded sleeve and the longitudinal support rod sections of the two L-shaped mounting rods, two pull rods are symmetrically rotatably connected.

[0027] A seeding device with automatic spacing adjustment provided by the present utility model has the following beneficial effects:

[0028] 1. The U-shaped dredging frame reciprocates up and down, which can push and drive the three guide hoses to slide up and down synchronously, and vibrate and dredge the three guide hoses. Compared with the prior art, it can save the trouble of manually sliding and vibrating the three guide hoses in sequence for clogging clearance. The operation and use are convenient, which helps to improve the clogging clearance efficiency of the three guide hoses.

[0029] 2. The driving rod is arranged close to the cross support handle pipe, which facilitates the hands holding the cross support handle pipe to directly drive the driving rod to slide up and release it, so that the clogging clearance operation of the three guide hoses can be carried out during the normal use of the seeding device. Compared with the prior art, it does not occupy the normal production and use time of the seeding device, which helps to improve the production and use efficiency of the seeding device.

[0030] 3. Sliding the threaded sleeve back and forth can push and drive the two outer L-shaped mounting rods to slide towards each other left and right, and adjust the spacing between the three L-shaped mounting rods and the three furrow openers, which is suitable for the tillage requirements of different spacings. The use is relatively flexible and the application is relatively wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments will be briefly introduced below.

[0032] The accompanying drawings in the following description only relate to some embodiments of the present utility model and do not limit the present utility model.

[0033] In the accompanying drawings, the length direction of the seed storage box is defined as the left - right direction, and the width direction is defined as the front - back direction.

[0034] Figure 1 The schematic diagram of the overall rear - side structure of the present utility model is shown;

[0035] Figure 2 The schematic diagram of the overall front - side structure of the present utility model is shown;

[0036] Figure 3 The schematic diagram of the overall bottom - side structure of the present utility model is shown;

[0037] Figure 4 The schematic diagram of the overall top - side structure of the present utility model is shown;

[0038] Figure 5 The schematic diagram of the L - shaped mounting rod and the longitudinal support screw rod structure of the present utility model is shown;

[0039] Figure 6 The schematic diagram of the U - shaped dredging frame and the U - shaped driving frame structure of the present utility model is shown.

[0040] List of reference numerals:

[0041] 1. Main body frame; 101. Tilted support rod; 102. Wheel axle; 103. Pulling plate; 104. T - shaped track bar;

[0042] 2. Seed storage box; 201. Longitudinal support positioning shaft; 202. U - shaped driving frame; 203. Connecting rod; 204. Positioning sleeve; 205. U - shaped dredging frame; 206. Feeding box;

[0043] 3. L - shaped mounting rod; 301. Seed outlet pipe; 302. Furrowing plow; 303. Feeding hose; 304. L - shaped support plate; 305. Longitudinal support screw rod; 306. Threaded sleeve; 307. Pulling rod;

[0044] 4. Electric control box;

[0045] 5. Feeding shaft; 501. Feeding roller;

[0046] 6. Motor; 7. Pushing frame; 701. Guide shaft; 702. Driving rod; 8. Steel wire rope. Detailed implementation manners

[0047] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0048] Please refer to Figures 1 to 6 ;

[0049] Embodiment 1:

[0050] The utility model proposes a sowing device with automatically adjusted spacing, comprising: a main frame 1, a seed box 2 is welded through the inside of the main frame 1, and a push frame 7 with an upward inclined support is welded on a long side tube of the main frame 1;

[0051] Three L-shaped mounting rods 3 are arranged and installed on another long side tube of the main frame 1, and the bottom ends of the three L-shaped mounting rods 3 are all welded with seed outlet pipes 301 at an angle; three material discharge boxes 206 are arranged and welded on the bottom wall of the seed box 2, and material guide hoses 303 are connected between the three material discharge boxes 206 and the three seed outlet pipes 301;

[0052] The three material guide hoses 303 are used to guide the seeds discharged into the three material discharge boxes 206 to the three seed outlet pipes 301;

[0053] A U-shaped dredging frame 205 is slidably mounted on two short side walls of the seed box 2, and the middle parts of the three guide hoses 303 are supported on the bottom side cross brace of the U-shaped dredging frame 205; two longitudinal support positioning shafts 201 are symmetrically welded on one long side wall of the seed box 2, and a U-shaped driving frame 202 is slidably mounted on the two longitudinal support positioning shafts 201 through spring pushing, and the U-shaped driving frame 202 rotates symmetrically with the U-shaped dredging frame 205 Two connecting rods 203 are connected; the push frame 7 as a whole is composed of two symmetrically arranged inclined push rods and a cross brace pipe welded to the tail ends of the two inclined push rods, wherein a guide shaft 701 is welded between the middle and lower positions of the two inclined push rods, and a driving rod 702 is slidably installed on the head ends of the two inclined push rods, and a steel wire rope 8 is connected between the driving rod 702 and the U-shaped driving frame 202, and the steel wire rope 8 is pulled around the guide shaft 701;

[0054] The two connecting rods 203, the U-shaped dredging frame 205 and the U-shaped driving frame 202 are jointly connected to form two crank-slider mechanisms. Through these two mechanisms, the U-shaped driving frame 202 that slides up and down and back and forth can push and drive the U-shaped dredging frame 205 to slide up and down reciprocally. The U-shaped dredging frame 205 sliding up and down reciprocally can push and drive the three feeding hoses 303 to slide up and down synchronously, so as to vibrate and dredge the three feeding hoses 303. Compared with the prior art, it can save the trouble of manually sliding and vibrating the three feeding hoses 303 in sequence for clogging removal and dredging, is convenient to operate and use, and helps to improve the clogging removal and dredging efficiency of the three feeding hoses 303;

[0055] Through the steel wire pulling rope 8, the driving rod 702 sliding upward along the two inclined push rods can pull and drive the U-shaped driving frame 202 to compress the springs on the two longitudinal support positioning shafts 201 and slide backward. And after releasing the driving rod 702, the U-shaped driving frame 202 loses the pulling and holding force of the driving rod 702 and is automatically pushed forward and reset by the springs on the two longitudinal support positioning shafts 201. Therefore, by alternately repeating the actions of sliding the driving rod 702 upward and releasing the driving rod 702, the U-shaped driving frame 202 can be driven to slide back and forth, and the U-shaped dredging frame 205 can be controlled to slide up and down reciprocally to implement vibration dredging;

[0056] The driving rod 702 is arranged close to the cross brace handle tube, which is convenient for the two hands holding the cross brace handle tube to directly drive the driving rod 702 to slide upward and release it. This enables the clogging removal and dredging operation of the three feeding hoses 303 to be carried out during the normal use of the seeding device. Compared with the prior art, it does not occupy the normal production and use time of the seeding device and helps to improve the production and use efficiency of the seeding device.

[0057] Preferably,

[0058] At the first ends of the two longitudinal support side rods of the U-shaped driving frame 202, two cross brace shafts are symmetrically welded. The second ends of the two connecting rods 203 are correspondingly rotationally connected to the two cross brace shafts, and the second ends of the two connecting rods 203 are correspondingly rotationally connected to the upper half sections of the two vertical support side rods of the U-shaped dredging frame 205.

[0059] Preferably,

[0060] The tail end of the steel wire pulling rope 8 is fixedly connected to the middle part of the cross brace side rod of the U-shaped driving frame 202.

[0061] Preferably,

[0062] At the bottom sides of the two short side walls of the seed hopper 2, two positioning sleeves 204 are symmetrically welded. The two vertical support side rods of the U-shaped dredging frame 205 are correspondingly penetrated and slidably matched with the two positioning sleeves 204.

[0063] Preferably,

[0064] Two downwardly inclined support rods 101 are symmetrically welded on a long side tube of the main frame 1 where the push frame 7 is installed. The bottom ends of the two inclined support rods 101 are penetrated by a wheel axle 102 that is rotatably installed. Two wheels are symmetrically mounted on both ends of the wheel axle 102.

[0065] Preferably,

[0066] A feeding shaft 5 is rotatably mounted at the middle position of the bottom side of the bottom plate of the seed box 2, and three feeding rollers 501 are arranged at equal intervals on the feeding shaft 5, and a circle of feeding teeth is arranged on the outer circumference of the feeding roller 501; three feeding troughs arranged at equal intervals are provided on the bottom plate of the seed box 2, and the three feeding troughs are connected to the three feeding boxes 206, and the three feeding rollers 501 are arranged in the three feeding troughs; the wheel axle 102 is driven by the feeding shaft 5 through a chain;

[0067] The three unloading rollers 501 can rotate and unload the seeds in the seed box 2 into the three unloading boxes 206 through a circle of unloading teeth on the outer circumference of the three unloading rollers 501; through the chain, the wheel axle 102 can rotate and drive the unloading shaft 5 and the three unloading rollers 501.

[0068] Preferably,

[0069] Two L-shaped pulling plates 103 are symmetrically welded to the top of a long side tube of the main frame 1 where the L-shaped mounting rod 3 is installed. The sowing device as a whole is connected to an external traction machine through the two pulling plates 103; the head ends of the three seed outlet tubes 301 are all threadedly fastened with furrowing plows 302;

[0070] The seeds discharged through the three seed outlet pipes 301 fall into three planting furrows opened by three furrowing plows 302 on the field.

[0071] Based on the first embodiment, the second embodiment:

[0072] On one long side tube of the L-shaped mounting rod 3 installed on the main body frame 1, two T-shaped track bars 104 are symmetrically welded. The first ends of the two outer L-shaped mounting rods 3 are correspondingly slidably engaged with the two T-shaped track bars 104, and the first end of the middle L-shaped mounting rod 3 is directly threadedly fastened to the middle part of the corresponding long side tube on the main body frame 1; on the seed storage box 2, a motor 6 is threadedly fastened at the middle position of one long side wall on the side of the pulling plate 103. And a L-shaped support plate 304 is welded to the bent part of the middle L-shaped mounting rod 3. A vertical support lead screw 305 is rotatably installed through the top end of the L-shaped support plate 304. The tail end of the vertical support lead screw 305 is axially connected and driven with the motor 6; a threaded sleeve 306 is screwed and sleeved on the vertical support lead screw 305. Two pull rods 307 are symmetrically and rotatably connected between the threaded sleeve 306 and the vertical support rod sections of the two L-shaped mounting rods 3; on the right side part of the front side wall of the seed storage box 2, an electric control box 4 is installed. Inside the electric control box 4, electric components for controlling the forward and reverse rotation of the motor 6 and a battery for supplying power to the motor 6 are installed;

[0073] The two pull rods 307, the threaded sleeve 306 and the two outer L-shaped mounting rods 3 together form two crank-slider mechanisms. Through these two mechanisms, sliding the threaded sleeve 306 back and forth can push and drive the two outer L-shaped mounting rods 3 to slide towards each other left and right, adjusting the spacing between the three L-shaped mounting rods 3 and the three furrowing plows 302 to meet the farming requirements of different spacings, with relatively flexible use and wide application;

[0074] Through the vertical support lead screw 305, the motor 6 can rotate forward and backward to push and drive the threaded sleeve 306 to slide back and forth, controlling the two outer L-shaped mounting rods 3 to automatically slide towards each other and automatically adjusting the farming spacing between the three furrowing plows 302.

[0075] The working principle of this embodiment: When in use, the seeding device is connected to an external traction machine through the two pulling plates 103. The three feeding rollers 501 can rotate and send the seeds in the seed storage box 2 into the three feeding boxes 206 by the row of feeding teeth on the outer circumference of the circle. Through the chain, the wheel shaft 102 can rotate and drive the feeding shaft 5 and the three feeding rollers 501. The seeds discharged through the three seed outlet pipes 301 fall into the three planting grooves plowed by the three furrowing plows 302 on the field

[0076] The two connecting rods 203, the U-shaped dredging frame 205 and the U-shaped driving frame 202 together form two crank-slider mechanisms. Through these two mechanisms, sliding the U-shaped driving frame 202 up and down, back and forth can push and drive the U-shaped dredging frame 205 to reciprocate up and down. The reciprocating up and down sliding of the U-shaped dredging frame 205 can push and drive the three guide hoses 303 to slide up and down synchronously, vibrating and dredging the three guide hoses 303;

[0077] Through the steel wire pull rope 8, the driving rod 702 can be pulled to slide upward along the two inclined push rods, so as to drive the U-shaped driving frame 202 to compress the springs on the two longitudinal support positioning shafts 201 and slide backward. After releasing the driving rod 702, the U-shaped driving frame 202 loses the pulling force of the driving rod 702 and is automatically pushed forward and reset by the springs on the two longitudinal support positioning shafts 201. Therefore, by alternately repeating the actions of sliding the driving rod 702 upward and releasing the driving rod 702, the U-shaped driving frame 202 can be driven to slide back and forth, and the U-shaped dredging frame 205 can be controlled to slide up and down reciprocally to implement vibration dredging;

[0078] The two pull rods 307, the threaded sleeves 306 and the two L-shaped mounting rods 3 on the outside are connected together to form two crank-slider mechanisms. Through these two mechanisms, sliding the threaded sleeve 306 back and forth can push the two L-shaped mounting rods 3 on the outside to slide toward each other left and right, adjusting the spacing between the three L-shaped mounting rods 3 and the three ditch plows 302 to meet the farming requirements with different spacings. Through the longitudinal support lead screw 305, the motor 6 can rotate forward and backward to push the threaded sleeve 306 to slide back and forth, controlling the two L-shaped mounting rods 3 on the outside to automatically slide toward each other and automatically adjusting the farming spacing between the three ditch plows 302.

[0079] In this article, the following points need to be noted:

[0080] 1. The drawings of the embodiments of the present invention only relate to the structures involved in the embodiments of the present invention, and other structures can refer to the general design.

[0081] 2. Without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0082] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A seeding device with automatic spacing adjustment, comprising: The main body frame (1), inside which a seed storage box (2) is welded through, and on one long side pipe of the main body frame (1), a pushing frame (7) which is supported obliquely upward is welded; It is characterized in that, on the other long side pipe of the main body frame (1), three L-shaped mounting rods (3) are arranged and installed, and at the bottom ends of the three L-shaped mounting rods (3), seed outlet pipes (301) are obliquely welded; on the bottom wall of the seed storage box (2), three feeding boxes (206) are arranged and welded, and between the three feeding boxes (206) and the three seed outlet pipes (301), guiding flexible hoses (303) are connected; On the two short side walls of the seed storage box (2), a U-shaped dredging frame (205) is slidably installed together, and the middle parts of the three guiding flexible hoses (303) are abutted and carried on the bottom cross bar of the U-shaped dredging frame (205); on one long side wall of the seed storage box (2), two longitudinal supporting positioning shafts (201) are symmetrically welded, and on the two longitudinal supporting positioning shafts (201), a U-shaped driving frame (202) is slidably installed together by spring pushing, and between the U-shaped driving frame (202) and the U-shaped dredging frame (205), two connecting rods (203) are symmetrically rotatably connected; the pushing frame (7) is integrally composed of two obliquely pushing rods arranged symmetrically and a cross bar handle pipe welded at the tail ends of the two obliquely pushing rods, between the middle and lower positions of the two obliquely pushing rods, a guiding shaft (701) is welded, and on the first ends of the two obliquely pushing rods, a driving rod (702) is slidably installed together, and between the driving rod (702) and the U-shaped driving frame (202), a steel wire pulling rope (8) is connected, and the steel wire pulling rope (8) is pulled and bypassed around the guiding shaft (701).

2. The automatic-spacing adjusting seeding device according to claim 1, characterized in that At the first ends of the two longitudinal supporting side rods of the U-shaped driving frame (202), two cross bar shafts are symmetrically welded, the tail ends of the two connecting rods (203) are correspondingly rotatably connected with the two cross bar shafts, and the tail ends of the two connecting rods (203) are correspondingly rotatably connected with the upper half sections of the two vertical supporting side rods of the U-shaped dredging frame (205).

3. The automatic-spacing adjusting seeding device according to claim 1, characterized in that The tail end of the steel wire pulling rope (8) is fixedly connected with the middle part of the cross bar side rod of the U-shaped driving frame (202).

4. The automatic-spacing adjusting seeding device according to claim 1, characterized in that On the bottom side positions of the two short side walls of the seed storage box (2), two positioning sleeves (204) are symmetrically welded, and the two vertical supporting side rods of the U-shaped dredging frame (205) are correspondingly in sliding fit with the two positioning sleeves (204) through penetration.

5. The automatic-spacing adjusting seeding device according to claim 1, characterized in that On the long side pipe of the main body frame (1) where the pushing frame (7) is installed, two obliquely downward inclined supporting rods (101) are symmetrically welded, at the bottom ends of the two obliquely downward inclined supporting rods (101), a wheel shaft (102) is rotatably installed through penetration together, and at both ends of the wheel shaft (102), two wheels are symmetrically sleeved.

6. The automatic-spacing adjusting seeding device according to claim 5, characterized in that A blanking shaft (5) is rotatably installed at the middle position on the bottom side of the bottom plate of the seed storage box (2). Three blanking rollers (501) are sleeved on the blanking shaft (5) at equal intervals. A circle of material pushing teeth is arranged on the outer circumference of the blanking roller (501); Three discharge grooves arranged at equal intervals are formed through the bottom plate of the seed storage box (2). The three discharge grooves communicate with the three blanking boxes (206) correspondingly, and the three blanking rollers (501) are arranged in the three discharge grooves respectively; The wheel shaft (102) is in transmission connection with the blanking shaft (5) through a chain.

7. The automatic-spacing adjusting seeding device according to claim 1, characterized in that At the top of one long side pipe of the L-shaped mounting rod (3) installed on the main body frame (1), two L-shaped pulling plates (103) are symmetrically welded. The whole seeding device is connected with an external traction machine through the two pulling plates (103); The first ends of the three seed outlet pipes (301) are all threadedly fastened with furrow openers (302).

8. The automatic-spacing adjusting seeding device according to claim 1, characterized in that Two T-shaped track bars (104) are symmetrically welded on one long side pipe of the L-shaped mounting rod (3) installed on the main body frame (1). The first ends of the two outer L-shaped mounting rods (3) are in sliding fit with the two T-shaped track bars (104) correspondingly, and the first end of the middle L-shaped mounting rod (3) is directly threadedly fastened to the middle part of the corresponding long side pipe on the main body frame (1); A motor (6) is threadedly fastened at the middle position of one long side wall of the seed storage box (2) on the side of the pulling plate (103). An L-shaped support plate (304) is welded to the bent part of the middle L-shaped mounting rod (3). A vertical support screw rod (305) is rotatably installed through the top end of the L-shaped support plate (304). The tail end of the vertical support screw rod (305) is in shaft connection and transmission with the motor (6); A threaded sleeve (306) is screwed and sleeved on the vertical support screw rod (305). Two pull rods (307) are symmetrically and rotatably connected between the threaded sleeve (306) and the vertical support rod sections of the two L-shaped mounting rods (3).

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