Agricultural and forestry seeder convenient for adjusting row spacing

Abstract

The present invention provides an agricultural and forestry seeder that is convenient for adjusting the row spacing, and relates to the technical field of seeders, including a seeding storage box, a main walking frame, a first row spacing adjustment frame, and a seeding adjustment frame, wherein the seeding storage box is fixedly arranged on the upper part of the main walking frame, a seeding adjustment frame is horizontally slidably arranged in the middle part of the main walking frame, a first row spacing adjustment frame is provided with a guide slide at intervals in an array, a second row spacing adjustment frame is fixedly connected to the rear of the first row spacing adjustment frame, a lower connecting slide is fixedly connected to the lower part of the first row spacing adjustment frame, and the lower connecting slide is fixed to the telescopic rod of the first telescopic cylinder. The second row spacing adjustment frame and the first row spacing adjustment frame adjust the row spacing between the seeding adjustment frame and the limitable adjustment frame through the guide slide, thereby solving the problem that the distance measurement and bolt disassembly and assembly operations are required each time, resulting in a long row spacing adjustment time.

Description

Technical Field

[0001] The invention relates to the technical field of surveying and mapping equipment, and in particular to an agricultural and forestry seeder which is convenient for adjusting row spacing. Background Art

[0002] With the development of machinery, in order to reduce the labor intensity of personnel during sowing, agricultural and forestry seeders are used to replace personnel in agricultural and forestry planting and sowing. Agricultural and forestry seeders are equipped with multiple seeders and can perform multi-row sowing operations at the same time.

[0003] The seed meter of the existing seeder is fixed to the machine body by bolts. When the row spacing needs to be adjusted for sowing different crops, personnel are required to manually measure the spacing of the seed meter, then remove the fixing bolts of the seed meter, push the seed meter to move, and install and tighten the bolts after the seed meter moves to the specified spacing. In addition, there are a large number of seed meters on the seeder, and distance measurement, bolt removal and installation operations are required each time, which results in a long time and cumbersome adjustment of the row spacing of the seeder. Summary of the invention

[0004] The disclosed embodiments relate to an agricultural and forestry seeder that is convenient for adjusting the row spacing. The horizontally movable second row spacing adjustment frame and the first row spacing adjustment frame adjust the row spacing between the seeding adjustment frame and the limitable adjustment frame through guiding slide grooves, eliminating the existing situation in which the seeding adjustment frame and the limitable adjustment frame are fixed by bolts, and when the row spacing needs to be adjusted, personnel have to manually measure and remove the bolts to move the positions of the seeding adjustment frame and the limitable adjustment frame. The row spacing adjustment is more convenient and the cumbersome row spacing adjustment process is eliminated. The limitable adjustment frame is fixed in position by sliding the upper positioning pin and the upper limit socket, and the seeding adjustment frames on both sides are moved close to the limitable adjustment frame, so that the seeding adjustment frames are divided into two groups for gathering and approaching.

[0005] In a first aspect of the present disclosure, there is provided an agricultural and forestry seeder that is convenient for adjusting row spacing, specifically comprising: a seeding storage box, a main walking frame, a first row spacing adjustment frame and a seed discharge adjustment frame, wherein the seeding storage box is fixedly arranged on the upper part of the main walking frame, a seed discharge adjustment frame is horizontally slidably arranged in the middle part of the main walking frame, a first row spacing adjustment frame is arranged in an interval array in the middle part of the main walking frame, and interconnected external seed dischargers are arranged in an interval array on both sides of the seeding storage box, the tail end of the external seed discharger is connected to the head end of a seed delivery hose, and the external seed discharger is driven to rotate by electricity or power provided by a tractor.

[0006] In at least some embodiments, a middle transverse sliding connecting beam is fixedly arranged at intervals in the middle of the main walking frame member, side walking wheels are rotatably arranged on both sides of the main walking frame member, and an upper limit socket is arranged at intervals in an array at the top of the middle transverse sliding connecting beam.

[0007] In at least some embodiments, the first line spacing adjustment frame is provided with a guide slide groove at an interval array, the rear of the first line spacing adjustment frame is fixedly connected to the second line spacing adjustment frame, the lower part of the first line spacing adjustment frame is fixedly connected to a lower connecting slide, the lower connecting slide and the telescopic rod of the first telescopic cylinder are fixed, and the first telescopic cylinder drives the lower connecting slide and the first line spacing adjustment frame and the second line spacing adjustment frame to move horizontally synchronously.

[0008] In at least some embodiments, the second row spacing adjustment frame interval array is provided with guide slides, the guide slides closer to the middle have smaller inclination angles, and the guide slides closer to the outside have larger inclination angles, and the guide slides have multiple radial structures with the middle as the center and the inclination angles on both sides gradually increase. The first telescopic cylinder is fixed to the middle of the sowing storage box, and the lower connecting slide is horizontally slidably connected to the middle of the sowing storage box.

[0009] In at least some embodiments, an upper connecting sliding column is fixedly provided on the top of the seed adjustment frame, and a furrowing seed transporter and a soil covering device are fixedly provided on the rear of the seed adjustment frame. The front of the furrowing seed transporter is used for furrowing, and the rear pipeline of the furrowing seed transporter is used for placing seeds and fertilizers, and the soil covering device pushes the soil for covering.

[0010] In at least some embodiments, a limitable adjustment frame is symmetrically slidably provided in the middle of the middle transverse sliding connecting beam, and seeding adjustment frames are slidably provided on both sides of the limitable adjustment frame of the middle transverse sliding connecting beam.

[0011] In at least some embodiments, an upper positioning pin is vertically slidably provided on the upper part of the limitable adjustable frame, the upper positioning pin is fixedly connected to the telescopic rod of the second telescopic cylinder, the second telescopic cylinder is fixedly connected to the limitable adjustable frame, the second telescopic cylinder extends to support the upper positioning pin to move upward, the upper positioning pin moves up to the inner side of the guide groove of the second line spacing adjustment frame or the first line spacing adjustment frame, and the upper positioning pin moves upward and is separated from the upper limit socket.

[0012] In at least some embodiments, the top end of the upper positioning pin and the upper connecting slide column slide on the inner side of the guide slide groove. When the first row spacing adjustment frame, the second row spacing adjustment frame and the guide slide groove move horizontally and longitudinally, the seed adjustment frame and the limitable adjustment frame slide horizontally along the middle transverse sliding connecting beam, and the row spacing between the transversely arranged seed adjustment frames and the limitable adjustment frames is adjusted.

[0013] In at least some embodiments, when the second telescopic cylinder is shortened, the upper positioning pin moves downward synchronously, the top end of the upper positioning pin is separated from the guide slot, and the lower end of the upper positioning pin is slidably inserted into the upper limit insertion hole. The limitable adjustment frame is in a fixed state at this time, and the movement of the second row spacing adjustment frame or the first row spacing adjustment frame will not drive the upper positioning pin and the limitable adjustment frame to move, while the seeding adjustment frames on both sides of the limitable adjustment frame continue to be guided by the guide slots of the second row spacing adjustment frame or the first row spacing adjustment frame to move close to the limitable adjustment frame, thereby realizing that the seeding adjustment frames are divided into two groups to move close to the limitable adjustment frames on both sides.

[0014] The present invention provides an agricultural and forestry seeder that is convenient for adjusting row spacing, which has the following beneficial effects: The horizontally movable second row spacing adjustment frame and the first row spacing adjustment frame adjust the row spacing between the seeding adjustment frame and the limitable adjustment frame through the guide slide, eliminating the existing situation in which the seeding adjustment frame and the limitable adjustment frame are fixed by bolts. When the row spacing needs to be adjusted, personnel have to manually measure and remove the bolts to move the position of the seeding adjustment frame and the limitable adjustment frame. This eliminates the cumbersome row spacing adjustment process and makes row spacing adjustment more convenient.

[0015] The limitable adjustable frame is fixed in position by sliding the upper positioning pin and the upper limit positioning hole, and the seeding adjustment frames on both sides are moved close to the limitable adjustable frame, so that the seeding adjustment frames are divided into two groups for gathering and approaching, and the middle space between the limitable adjustable frames is reserved for people to walk, which also meets the needs of dividing the plots.

[0016] The sowing storage box is divided into two compartments, front and rear, for placing seeds and fertilizers respectively. The external seed dischargers in front and rear of the sowing storage box transport seeds and fertilizers simultaneously to achieve simultaneous sowing and fertilizing. During high-density sowing, the row spacing between the seed discharge adjustment frame and the limitable adjustment frame under the first row spacing adjustment frame and the second row spacing adjustment frame is staggered to achieve double sowing density and improve the utilization efficiency of the width space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0018] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0019] In the attached picture: Figure 1 A schematic diagram showing the overall structure of the present application; Figure 2 A schematic diagram showing the main walking frame structure of the present application is shown; Figure 3A schematic diagram showing the structure of the furrowing seed transporter of the present application is shown; Figure 4 A schematic diagram showing a second row spacing adjustment frame structure of the present application is shown; Figure 5 A schematic diagram showing the structure of the upper positioning latch in the present application in an upwardly moved state; Figure 6 A schematic structural diagram of the lower connecting slide of the present application is shown; Figure 7 A structural schematic diagram showing the connection state of the transverse sliding connecting beam and the first row spacing adjustment frame in the present application; Figure 8 A structural schematic diagram showing the separation state of the seeding storage box, the main walking frame member and the first row spacing adjustment frame of the present application; Reference numerals list 1. Seeding storage box; 101. External seed discharger; 102. Seed delivery hose; 2. Main walking frame; 201. Middle transverse sliding connecting beam; 202. Side walking wheels; 203. Upper limit socket; 3. First row spacing adjustment frame; 301. Guide slide; 302. Second row spacing adjustment frame; 303. Lower connecting slide; 304. First telescopic cylinder; 4. Seed adjustment frame; 401. Upper connecting slide column; 402. Limitable adjustment frame; 403. Furrowing seed conveyor; 404. Soil cover; 405. Upper positioning pin; 406. Second telescopic cylinder. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figures 1 to 8 : The present invention proposes an agricultural and forestry seeder that is convenient for adjusting the row spacing, comprising: a seeding storage box 1, a main walking frame member 2, a first row spacing adjustment frame 3 and a seeding adjustment frame 4. Both sides of the seeding storage box 1 are arranged with interconnected external seeding devices 101 in an array at intervals. The external seeding device 101 is mainly composed of a cylinder with a plurality of grooves. The cylindrical grooves of the external seeding device 101 are used for intermittent seed transportation. The tail end of the external seeding device 101 is connected to the head end of a seed delivery hose 102. The external seeding device 101 is driven to rotate by a tractor to provide electricity or power. The seeding storage box 1 It is fixedly arranged on the upper part of the main walking frame member 2, and a middle transverse sliding connecting beam 201 is fixedly arranged at intervals in the middle of the main walking frame member 2. The middle transverse sliding connecting beam 201 is a rectangular steel pipe structure. The main walking frame member 2 is a frame structure composed of a rectangular pipe welded together. Side walking wheels 202 are rotatably arranged on both sides of the main walking frame member 2. An upper limit jack 203 is arranged at intervals in the top array of the middle transverse sliding connecting beam 201. A seeding adjustment frame 4 is horizontally slidably arranged in the middle of the main walking frame member 2, and an upper connecting slide column is fixedly arranged on the top of the seeding adjustment frame 4. 401, a furrowing seeding device 403 and a soil covering device 404 are fixedly arranged at the rear of the seeding adjustment frame 4, the front of the furrowing seeding device 403 is used for furrowing, and the rear pipeline of the furrowing seeding device 403 is used for placing seeds and fertilizers, and the soil covering device 404 pushes the soil for covering, and a limitable adjustment frame 402 is symmetrically slidably arranged in the middle of the middle transverse sliding connecting beam 201, and a seeding adjustment frame 4 is slidably arranged on both sides of the limitable adjustment frame 402 of the middle transverse sliding connecting beam 201, and a first row spacing adjustment frame 3 is arranged in an interval array in the middle of the main walking frame member 2, and the first row spacing adjustment frame 3 is arranged in an interval array. The array is provided with a guide slide 301, the rear of the first row spacing adjustment frame 3 is fixedly connected to the second row spacing adjustment frame 302, the first row spacing adjustment frame 3 and the second row spacing adjustment frame 302 are both plate-like structures, the lower part of the first row spacing adjustment frame 3 is fixedly connected to the lower connecting slide 303, the lower connecting slide 303 and the telescopic rod of the first telescopic cylinder 304 are fixed, the first telescopic cylinder 304 and the hydraulic oil pipe of the tractor are connected and controlled, and the first telescopic cylinder 304 pushes the lower connecting slide 303 and the first row spacing adjustment frame 3 and the second row spacing adjustment frame 302 to move horizontally synchronously.

[0022] In the embodiments of the present disclosure, as shown in the attached Figure 2 , 4As shown in , 5 and 6, the second row spacing adjustment frame 302 is provided with guide slide grooves 301 in an interval array, and each guide slide groove 301 corresponds to an upper positioning pin 405 or an upper connecting slide column 401. The closer the guide slide groove 301 is to the middle, the smaller the inclination angle is, and the closer the guide slide groove 301 is to the outside, the larger the inclination angle is. The guide slide grooves 301 have multiple radial structures with the middle as the center and the inclination angles on both sides gradually increase. When the guide slide groove 301 moves horizontally and longitudinally, the guide slide groove 301 guides the upper positioning pin 405 and the upper connecting slide column 401 to move horizontally and transversely along the middle transverse sliding connecting beam 201. The first telescopic cylinder 304 is fixed to the middle part of the sowing storage box 1, and the lower connecting slide 303 is horizontally slidably connected to the middle part of the sowing storage box 1. The first telescopic cylinder 304 supports the lower connecting slide 303 and the second row spacing adjustment frame 302 and the first row spacing adjustment frame 3 to move horizontally to adjust the position.

[0023] In the embodiments of the present disclosure, as shown in the attached Figure 4 , 5 As shown in , 6 and 7, the upper part of the limitable adjustable frame 402 is vertically slidably provided with an upper positioning pin 405, the upper positioning pin 405 is fixedly connected to the telescopic rod of the second telescopic cylinder 406, the second telescopic cylinder 406 is connected and controlled to the hydraulic oil pipe of the tractor, the second telescopic cylinder 406 is fixedly connected to the limitable adjustable frame 402, the second telescopic cylinder 406 is extended to support the upper positioning pin 405 to move upward, the upper positioning pin 405 moves up to the inner side of the guide slide groove 301 of the second line spacing adjustment frame 302 or the first line spacing adjustment frame 3, and the upper positioning pin 405 moves up and separates from the upper limit socket 203.

[0024] In the embodiments of the present disclosure, as shown in the attached Figure 4 , 5 As shown in , 6 and 7, the top end of the upper positioning pin 405 and the upper connecting slide column 401 both slide on the inner side of the guide slide groove 301. When the first row spacing adjustment frame 3 and the second row spacing adjustment frame 302 and the guide slide groove 301 move horizontally and longitudinally, the seeding adjustment frame 4 and the limitable adjustment frame 402 slide horizontally along the middle transverse sliding connecting beam 201, and the row spacing between the transversely arranged seeding adjustment frame 4 and the limitable adjustment frame 402 is adjusted, eliminating the need for the existing seeding adjustment frame 4 and the limitable adjustment frame 402 to be fixed by bolts. When the row spacing needs to be adjusted, personnel must manually measure and remove the bolts to move the seeding adjustment frame 4 and the limitable adjustment frame 402 positions, and then manually tighten the bolts to fix them, which results in a relatively cumbersome operation process for adjusting the row spacing.

[0025] When the second telescopic cylinder 406 is shortened, the upper positioning pin 405 moves downward synchronously, the top end of the upper positioning pin 405 is separated from the guide slot 301, and the lower end of the upper positioning pin 405 is slidably inserted into the upper limit insertion hole 203, and the limitable adjustment frame 402 is in a fixed state at this time. The movement of the second row spacing adjustment frame 302 or the first row spacing adjustment frame 3 will not drive the upper positioning pin 405 and the limitable adjustment frame 402 to move, and the seeding adjustment frames 4 on both sides of the limitable adjustment frame 402 continue to be guided by the second row spacing adjustment frame 302 or the guide slot 301 of the first row spacing adjustment frame 3 to move close to the limitable adjustment frame 402, so that the seeding adjustment frames 4 are divided into two groups to gather and approach the limitable adjustment frames 402 on both sides, and the middle space between the two limitable adjustment frames 402 is not sown, leaving a walking section for personnel.

[0026] Embodiment 2, on the basis of embodiment 1, the seeding adjustment frame 4 and the limitable adjustment frame 402 are provided with the same structure of the upper positioning pin 405 and the second telescopic cylinder 406 for positioning, so as to realize the spacing adjustment of the seeding adjustment frame 4 in various ways such as the clustered arrangement on both sides, or to adjust the position of the single limitable adjustment frame 402.

[0027] The working principle of this embodiment is as follows: the tractor pulls the seeding storage box 1 and the main walking frame member 2 to move through the side walking wheels 202. The front and rear sides of the seeding storage box 1 are also provided with spiral shafts for pushing the internal seeds to move toward the sides to ensure the uniform distribution of the internal seeds. The seeding storage box 1 is divided into two front and rear compartments for placing seeds and fertilizers respectively. The external seed dischargers 101 in front and behind the seeding storage box 1 transport seeds and fertilizers at the same time. The external seed dischargers 101 transport seeds and fertilizers to the furrowing seed discharger 403 through the seed delivery hose 102. The front of the furrowing seed discharger 403 performs furrowing, and the rear pipeline of the furrowing seed discharger 403 is used to place seeds and fertilizers. The soil cover 404 pushes the soil to cover the seeds, so that sowing and fertilization can be carried out simultaneously. However, when sowing different crops, the sowing spacing needs to be adjusted. The first telescopic cylinder 304 pulls the second row spacing adjustment frame 302 The second row spacing adjustment frame 302 and the first row spacing adjustment frame 3 that move horizontally guide the upper connecting slide column 401 and the upper positioning pin 405 to move through the guide slide groove 301. The upper connecting slide column 401 and the upper positioning pin 405 drive the seeding adjustment frame 4 and the limitable adjustment frame 402 to move horizontally and horizontally along the middle horizontal sliding connecting beam 201. The row spacing between the horizontally arranged seeding adjustment frame 4 and the limitable adjustment frame 402 is adjusted, eliminating the need for the existing seeding adjustment frame 4 and the limitable adjustment frame 402 to be fixed by bolts. When the row spacing needs to be adjusted, personnel must manually measure and remove the bolts to move the seeding adjustment frame 4 and the limitable adjustment frame 402 positions, and then manually tighten the bolts to fix them, eliminating the cumbersome row spacing adjustment process, personnel can adjust the row spacing more quickly and worry-free, and personnel can use sowing more conveniently; The second telescopic cylinder 406 shortens and pulls the upper positioning pin 405 downward, and the upper positioning pin 405 is separated from the second row spacing adjustment frame 302 or the first row spacing adjustment frame 3, and the upper positioning pin 405 moves downward and slides into the upper limit insertion hole 203, and the limitable adjustment frame 402 is fixed in position by sliding the upper positioning pin 405 and the upper limit insertion hole 203. The movement of the second row spacing adjustment frame 302 or the first row spacing adjustment frame 3 will not drive the upper positioning pin 405 and the limitable adjustment frame 402 to move, and the seeding adjustment frames 4 on both sides of the limitable adjustment frame 402 continue to move along the guide slide groove 301 of the second row spacing adjustment frame 302 or the first row spacing adjustment frame 3 close to the limitable adjustment frame 402, so that the seeding adjustment frames 4 are divided into two groups to gather and approach the limitable adjustment frames 402 on both sides, and the middle space between the limitable adjustment frames 402 is reserved for personnel to walk, which is also convenient for dividing the plots; When high-density sowing is required, seeds are placed in both the front and rear compartments of the sowing storage box 1. By staggering the row spacing between the seed adjustment frame 4 and the limitable adjustment frame 402 below the first row spacing adjustment frame 3 and the second row spacing adjustment frame 302, the seed adjustment frame 4 and the limitable adjustment frame 402 below the first row spacing adjustment frame 3 and the second row spacing adjustment frame 302 each perform a row of sowing operations, thereby making full use of the width space, adapting to the sowing operations of some high-density crops, and adapting to the sowing operations of crops such as vegetables with narrower sowing density, achieving double sowing density, and improving the utilization efficiency of the width space.

[0028] In this article, there are a few points to note: 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0029] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0030] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. An agricultural and forestry seeder that is convenient for adjusting row spacing, comprising: A sowing storage box (1), a main walking frame member (2), a first row spacing adjustment frame (3) and a seeding adjustment frame (4); characterized in that the sowing storage box (1) is fixedly arranged on the upper part of the main walking frame member (2), a seeding adjustment frame (4) is horizontally slidably arranged in the middle part of the main walking frame member (2), the first row spacing adjustment frame (3) is provided with guide slide grooves (301) in an interval array, the rear part of the first row spacing adjustment frame (3) is fixedly connected to the second row spacing adjustment frame (302), the lower part of the first row spacing adjustment frame (3) is fixedly connected to a lower connecting slide frame (303), and the lower connecting slide frame (303) is fixed to the telescopic rod of the first telescopic cylinder (304).

2. The agricultural and forestry seeder that is easy to adjust the row spacing according to claim 1, characterized in that: The middle part of the main walking frame member (2) is provided with a first row spacing adjustment frame (3) in an array at intervals, and both sides of the sowing storage box (1) are provided with connected external seed dischargers (101) in an array at intervals, and the tail end of the external seed discharger (101) is connected to the head end of the seed delivery hose (102).

3. The agricultural and forestry seeder that is easy to adjust the row spacing according to claim 2, characterized in that: A middle transverse sliding connection beam (201) is fixedly arranged at intervals in the middle of the main walking frame member (2), side walking wheels (202) are rotatably arranged on both sides of the main walking frame member (2), and upper limit insertion holes (203) are arranged in an array at intervals at the top of the middle transverse sliding connection beam (201).

4. The agricultural and forestry seeder that is easy to adjust the row spacing according to claim 3, characterized in that: The second row spacing adjustment frame (302) is provided with guide slide grooves (301) in an array at intervals, the first telescopic cylinder (304) is fixed to the middle of the sowing storage box (1), and the lower connecting slide frame (303) is horizontally slidably connected to the middle of the sowing storage box (1).

5. The agricultural and forestry seeder that is easy to adjust the row spacing according to claim 4, characterized in that: An upper connecting slide column (401) is fixedly arranged on the top of the seeding adjustment frame (4), and a furrowing seed conveyor (403) and a soil covering device (404) are fixedly arranged on the rear of the seeding adjustment frame (4).

6. The agricultural and forestry seeder that is easy to adjust the row spacing according to claim 5, characterized in that: A limitable adjustment frame (402) is symmetrically slidably provided in the middle of the middle transverse sliding connection beam (201), and seeding adjustment frames (4) are slidably provided on both sides of the limitable adjustment frame (402) of the middle transverse sliding connection beam (201).

7. The agricultural and forestry seeder that is easy to adjust the row spacing according to claim 6, characterized in that: An upper positioning latch (405) is vertically slidably provided on the upper portion of the limitable adjustable frame (402); the upper positioning latch (405) is fixedly connected to the telescopic rod of the second telescopic cylinder (406); and the second telescopic cylinder (406) is fixedly connected to the limitable adjustable frame (402).

8. The agricultural and forestry seeder that is convenient for adjusting row spacing according to claim 7, characterized in that: The top end of the upper positioning pin (405) and the upper connecting slide column (401) both slide on the inner side of the guide slide groove (301), and when the first row spacing adjustment frame (3), the second row spacing adjustment frame (302) and the guide slide groove (301) move horizontally and longitudinally, the seeding adjustment frame (4) and the limitable adjustment frame (402) slide horizontally along the middle horizontal sliding connecting beam (201).

9. The agricultural and forestry seeder that is convenient for adjusting row spacing according to claim 8, characterized in that: When the second telescopic cylinder (406) is shortened, the upper positioning pin (405) moves downward synchronously, the top end of the upper positioning pin (405) is separated from the guide groove (301), and the lower end of the upper positioning pin (405) is slidably inserted into the upper limit insertion hole (203), so that the limitable adjustment frame (402) is in a fixed state at this time.

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