A soybean planter with adjustable planting depth

Abstract

The application discloses a soybean planter with adjustable planting depth, which comprises a main body, an inner cylinder integrally formed at the lower end of the main body, a hollow insertion rod slidingly connected to the outer wall of the inner cylinder, an adjusting sleeve threadedly connected to the outside of the insertion rod, a connecting sleeve arranged below the adjusting sleeve, and the lower end of the main body and the upper end of the connecting sleeve being rotatably connected to the two ends of the adjusting sleeve through bearings respectively. The insertion rod and the adjusting sleeve are threadedly connected, and the adjusting sleeve is rotatably connected to the main body and the connecting sleeve. When the adjusting sleeve is rotated, the adjusting sleeve drives the insertion rod to move by virtue of the sliding limitation of the insertion rod and the inner cylinder and the thread connection between the insertion rod and the adjusting sleeve, so that the length of the insertion rod exposed below the connecting sleeve can be adjusted according to the actual planting depth requirement, and then the insertion rod is inserted into the ground for planting, thereby achieving the purpose of adjustable planting depth.

Description

Technical Field

[0001] This invention belongs to the field of soybean planting equipment technology, specifically relating to a soybean planter with adjustable planting depth. Background Technology

[0002] Soybean planters are mechanical devices used in the soybean planting process to facilitate quick and easy planting operations, improve planting efficiency, and reduce labor burden. Due to regional differences such as plains, hills, and mountains, both manual and mechanical planting methods can be used in plains areas, while manual planting is more commonly used in hilly and mountainous areas due to their specific characteristics.

[0003] Currently, most artificial planters on the market consist of a cylindrical main body with a soil-breaking block at the bottom and a feed inlet at the top. The soil-breaking block breaks up the soil in the planting area, and the feed inlet is used to place the seeds, allowing the seeds to enter the soil-breaking groove along the main body, thus planting the seeds while breaking up the soil.

[0004] For example, patent application number 202222768777.5 discloses an artificial corn planter, including a planter body, which is a hollow rectangle. A planting handle is fixedly installed on the top of the planter body, and a movable groove is opened on the front wall of the planter body. A foot pedal is horizontally arranged on the front wall of the planter body, and a soil-breaking mechanism is arranged on the bottom wall of the planter body. The planting handle makes it convenient for workers to hold the device. When using it, the worker inserts the device into the ground with the soil-breaking mechanism facing down, and then steps on the foot pedal. As the foot pedal moves downward, it drives two sets of soil-breaking iron blocks to move in opposite directions. The corn inside the planter body falls into the ground through the material passage. When the worker lifts their foot, the two sets of soil-breaking iron blocks move closer together, and then the device is lifted upward, thus completing the entire planting process. This can effectively improve individual work efficiency by completing soil breaking and sowing in one step.

[0005] However, the soil-breaking mechanism of the above-mentioned planter is a fixed setting, and the soil-breaking depth cannot be adjusted according to the actual planting needs. Therefore, the planting depth of the planter cannot be flexibly adjusted when planting soybeans. Therefore, we need to propose a soybean planter with adjustable planting depth to solve the above-mentioned problems. Summary of the Invention

[0006] The purpose of this invention is to provide a soybean planter with adjustable planting depth. When rotating the adjusting sleeve, the sliding restriction between the insert rod and the inner cylinder, as well as the threaded engagement between the insert rod and the adjusting sleeve, causes the adjusting sleeve to move the insert rod. This is used to adjust the exposed length of the insert rod below the connecting sleeve, allowing the length of the insert rod to be flexibly adjusted according to the actual planting depth requirements. The insert rod is then inserted into the ground for planting, achieving the purpose of adjustable planting depth. This solves the problems mentioned in the background art, such as low work efficiency and waste of a lot of manpower in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An adjustable soybean planter includes a main body, with an inner cylinder integrally formed at the lower end of the main body. A hollow insert rod is slidably connected to the outer wall of the inner cylinder. An adjusting sleeve is threadedly connected to the outside of the insert rod. A connecting sleeve is provided below the adjusting sleeve. Both ends of the adjusting sleeve are rotatably connected to the lower end of the main body and the upper end of the connecting sleeve respectively through bearings. The outer wall of the connecting sleeve is fixed to the lower end of the main body through two connecting rods, so that the adjusting sleeve drives the insert rod to move downward or upward when rotating. The lower end of the insert rod passes through the connecting sleeve and is provided with a sharp corner, and the lower end of the sharp corner is provided with a bevel.

[0009] The main body has a cavity communicating with the inner cylinder. The upper end of the cavity is connected to a feed hopper. The lower end of the inner cylinder has a funnel-shaped discharge hole communicating with the inside of the insertion rod. A movable lifting assembly is installed inside the cavity. The upper end of the lifting assembly extends through the top wall of the main body to the outside of the main body. A reset mechanism is installed on the lifting assembly at the upper end of the cavity to reset the position of the lifting assembly. The reset mechanism is slidably connected to the inner wall of the cavity. An anti-blocking mechanism is installed at the lower end of the lifting assembly to prevent the insertion rod from blocking. The anti-blocking mechanism is slidably installed inside the insertion rod. The upper end of the anti-blocking mechanism is threadedly connected to the lifting assembly, so that the anti-blocking mechanism can move up or down with the lifting assembly. The length of the anti-blocking mechanism can be adjusted when the lifting assembly rotates. Two foldable foot pedal assemblies are installed on the outer wall of the connecting sleeve. A handle is fixed on the upper side wall of the main body.

[0010] Preferably, the lifting assembly includes a lifting rod that is movably inserted into the cavity, with the upper end of the lifting rod passing through the upper end of the main body and a connecting plate fixed thereon. A handle is fixed to the upper end of the connecting plate, and a tapered stop is fixed to the lower end of the lifting rod. The lower end of the stop matches the opening of the feeding hole, and a through hole is provided at the upper end of the main body for the lifting rod to pass through.

[0011] Preferably, the reset mechanism includes a cone block and a spring. The cone block is rotatably sleeved on the outer wall of the lifting rod. The spring is located between the cone block and the top wall of the cavity. A limit block is fixed on one side of the cone block. A second slide groove is provided on the inner wall of the cavity for the limit block to slide. When the spring is not compressed, the limit block is located at the lower end of the second slide groove. When the spring is compressed, the limit block is located at the upper end of the second slide groove.

[0012] Preferably, the anti-blocking mechanism includes a tapered anti-blocking block with a pointed lower end, a lead screw fixedly fixed to the upper end of the tapered anti-blocking block, the upper end of the lead screw being threadedly connected to the inside of the insert rod, the lower end of the insert rod having a threaded through hole for threaded connection of the upper end of the lead screw, and the lower end of the lead screw being slidably connected to the inner wall of the insert rod.

[0013] Preferably, a limiting rod is fixed to the lower outer wall of the lead screw, and a third sliding groove is provided inside the insert rod for one end of the limiting rod to slide, the length of the third sliding groove being the same as the length of the second sliding groove.

[0014] Preferably, two sliders are symmetrically fixed to the inner wall of the upper end of the insertion rod, and a first groove is provided on the outer wall of the inner cylinder for the two sliders to slide.

[0015] Preferably, the outer wall of the insertion rod is provided with an external thread section, and the inner wall of the adjusting sleeve is provided with an internal thread that matches the external thread section.

[0016] Preferably, a convex ring is provided at the lower end of the main body and the upper end of the connecting sleeve, and a bearing is installed on the outer wall of the convex ring. The outer walls of the convex rings on the main body and the connecting sleeve are respectively embedded in the two ends of the adjusting sleeve.

[0017] Preferably, the outer wall of the adjusting sleeve is fixed with multiple adjusting protrusions at equal angles, the side of the connecting rod is arranged in a U-shape, and the adjusting protrusions are located on the inner side of the connecting rod.

[0018] Preferably, the foot pedal assembly includes a fixing block and a pedal. One end of the pedal is integrally formed with a protrusion. The fixing block is fixed to the outer wall of the connecting sleeve. The upper end of the fixing block has a notch for the protrusion to enter. The protrusion is rotatably connected to the inside of the notch by a pin.

[0019] The soybean planter with adjustable planting depth proposed in this invention has the following advantages compared with the prior art:

[0020] 1. This invention utilizes the threaded engagement between the insertion rod and the adjusting sleeve, as well as the rotational engagement between the adjusting sleeve and the main body and the connecting sleeve. When the adjusting sleeve is rotated, the sliding restriction between the insertion rod and the inner cylinder, along with the threaded engagement between the insertion rod and the adjusting sleeve, allows the adjusting sleeve to move the insertion rod. This is used to adjust the exposed length of the insertion rod below the connecting sleeve, enabling flexible adjustment of the insertion rod length according to the actual planting depth requirements. The insertion rod is then inserted into the ground for planting, achieving the purpose of adjustable planting depth.

[0021] 2. The foldable foot pedal assembly of the present invention allows the foot to apply an insertion force to the ground on the insertion rod, making it easy to insert the insertion rod into the ground for planting.

[0022] 3. The present invention uses a lifting component to place soybean seeds into the cavity through the feeding hopper. After the insertion rod is inserted into the ground, the lifting component is moved upward to expose the feeding hole and sow the seeds in the cavity. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0025] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0026] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point B;

[0027] Figure 5 This is a schematic diagram of the foot pedal assembly of the present invention when folded.

[0028] Figure 6 This is a schematic diagram of the exploded structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the exploded structure of the inner rod and the insertion rod of the present invention;

[0030] Figure 8 This is a schematic diagram of the lifting component, anti-blocking mechanism, and reset mechanism of the present invention.

[0031] In the diagram: 1. Main body; 2. Adjusting sleeve; 3. Connecting sleeve; 4. Foot pedal assembly; 401. Fixing block; 402. Pedal; 403. Protrusion; 404. Pin; 5. Insert rod; 6. Connecting rod; 7. Feed hopper; 8. Lifting assembly; 81. Lifting rod; 82. Connecting plate; 83. Handle; 84. Reset mechanism; 841. Conical block; 842. Spring; 843. Limiting block; 85. Stop block; 86. Lead screw; 87. Conical anti-blocking block; 88. Limiting rod; 9. Handle; 10. Adjusting protrusion; 11. Inner cylinder; 12. Bearing; 13. Sliding block; 14. First slide groove; 15. Discharge hole; 16. Through hole; 17. Protruding ring; 18. Third slide groove. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] This invention provides, for example Figure 1-8 The soybean planter with adjustable planting depth shown includes a main body 1. The lower end of the main body 1 is integrally formed with an inner cylinder 11. A hollow insertion rod 5 is slidably connected to the outer wall of the inner cylinder 11. An adjusting sleeve 2 is threadedly connected to the outside of the insertion rod 5. A connecting sleeve 3 is provided below the adjusting sleeve 2. Both ends of the adjusting sleeve 2 are rotatably connected to the lower end of the main body 1 and the upper end of the connecting sleeve 3 respectively through bearings 12. The outer wall of the connecting sleeve 3 is fixed to the lower end of the main body 1 through two connecting rods 6, so that the adjusting sleeve 2 drives the insertion rod 5 to move downward or upward when rotating. The lower end of the insertion rod 5 passes through the connecting sleeve 3 and is provided with a sharp corner. The lower end of the sharp corner is provided with a bevel to facilitate the insertion of the insertion rod 5 into the ground.

[0034] The main body 1 has a cavity communicating with the inner cylinder 11. The upper end of the cavity is connected to the feed hopper 7. The lower end of the inner cylinder 11 has a funnel-shaped discharge hole 15 communicating with the inside of the insertion rod 5. A movable lifting assembly 8 is installed inside the cavity. The upper end of the lifting assembly 8 extends through the top wall of the main body 1 to the outside of the main body 1. A reset mechanism 84 is installed on the lifting assembly 8 at the upper end of the cavity to reset the position of the lifting assembly 8. The reset mechanism 84 is slidably connected to the inner wall of the cavity. An anti-blocking mechanism is installed at the lower end of the lifting assembly 8 to prevent the insertion rod 5 from blocking. The anti-blocking mechanism is slidably installed inside the insertion rod 5, and the upper end of the anti-blocking mechanism is threadedly connected to the lifting component 8, so that the anti-blocking mechanism can move up or down with the lifting component 8. When the lifting component 8 rotates, the length of the anti-blocking mechanism can be adjusted. Two foldable foot pedal components 4 are installed on the outer wall of the connecting sleeve 3. At least one foot pedal component 4 can be selected according to actual use needs, so that it can be suitable for different people's usage habits. When planting, the foot is used to apply an insertion force to the insertion rod 5, which makes it easy to insert the insertion rod 5 into the ground for planting. A handle 9 is fixed on the upper side wall of the main body 1.

[0035] When rotating the adjusting sleeve 2, the sliding restriction between the insert rod 5 and the inner cylinder 11, as well as the threaded engagement between the insert rod 5 and the adjusting sleeve 2, causes the adjusting sleeve 2 to move the insert rod 5. This is used to adjust the exposed length of the insert rod 5 below the connecting sleeve 3, so that the length of the insert rod 5 can be flexibly adjusted according to the actual planting depth requirements. Then, the insert rod 5 is inserted into the ground for planting, achieving the purpose of adjustable planting depth.

[0036] The lifting assembly 8 includes a lifting rod 81, which is movably inserted into the cavity. The upper end of the lifting rod 81 passes through the upper end of the main body 1 and is fixed with a connecting plate 82. The upper end of the connecting plate 82 is fixed with a handle 83. The lower end of the lifting rod 81 is fixed with a tapered stop 85. The lower end of the stop 85 matches the opening of the feeding hole 15. The upper end of the main body 1 has a through hole 16 for the lifting rod 81 to pass through. By lifting the lifting rod 81 upward with the handle 83, the lifting rod 81 drives the stop 85 to move upward, so that there is a gap between the stop 85 and the feeding hole 15, which facilitates the seeds to pass through the gap for planting.

[0037] The reset mechanism 84 includes a cone block 841 and a spring 842. The cone block 841 is rotatably sleeved on the outer wall of the lifting rod 81. The spring 842 is located between the cone block 841 and the top wall of the cavity. A limit block 843 is fixed on one side of the cone block 841. A second slide groove is provided on the inner wall of the cavity for the limit block 843 to slide. When the spring 842 is not compressed, the limit block 843 is located at the lower end of the second slide groove. When the spring 842 is compressed, the limit block 843 is located at the upper end of the second slide groove. When the lifting rod 81 is lifted, the cone block 841 compresses the spring 842. When the handle 83 is released, the elasticity of the spring 842 drives the cone block 841 into the interior of the discharge hole 15, blocking the discharge hole 15. Since the upper tip of the cone block is inclined, the accumulation of seeds on the cone block 841 can be effectively reduced.

[0038] The anti-blocking mechanism includes a tapered anti-blocking block 87 with a pointed lower end. A lead screw 86 is fixedly fixed to the upper end of the tapered anti-blocking block 87. The upper end of the lead screw 86 is threadedly connected to the inside of the insert rod 5. The lower end of the insert rod 5 has a threaded through hole 16 for the upper end of the lead screw 86 to be threadedly connected. The lower end of the lead screw 86 is slidably connected to the inner wall of the insert rod 5. By rotating the lifting rod 81 through the handle 83, the lead screw 86 remains stationary when the lifting rod 81 is rotated due to the sliding connection between the lead screw 86 and the inner wall of the insert rod 5. Furthermore, due to the threaded engagement between the lead screw 86 and the lifting rod 81, the lead screw 86 can move up or down to adjust the length of the lead screw 86 between the tapered anti-blocking block 87 and the stop block 85. This allows the tapered anti-blocking block 87 to be adjusted according to the adjustment requirements of the insert rod 5.

[0039] A limiting rod 88 is fixed to the lower outer wall of the lead screw 86. A third groove 18 is provided inside the insertion rod 5 for one end of the limiting rod 88 to slide. The length of the third groove 18 is the same as the length of the second groove. The lifting height of the lifting rod 81 is limited by the third groove 18 and the second groove. The lifting height of the lifting rod 81 can make the stop block 85 move away from the gap created by the feeding hole 15 so that the seeds fall from the feeding hole 15 into the insertion rod 5, and then fall from the gap between the conical anti-blocking block 87 and the inclined hole into the hole where the insertion rod 5 is inserted, so as to complete the breaking of soil and sowing.

[0040] Two sliders 13 are symmetrically fixed on the inner wall of the upper end of the insertion rod 5. The outer wall of the inner cylinder 11 is provided with a first groove 14 for the two sliders 13 to slide, so that the insertion rod 5 and the inner cylinder 11 are slidably connected, which makes it easy for the insertion rod 5 to move up or down when the adjusting sleeve 2 rotates.

[0041] The outer wall of the insertion rod 5 is provided with an external thread section, and the inner wall of the adjusting sleeve 2 is provided with an internal thread that matches the external thread section. This facilitates the use of the threaded engagement between the external thread section and the internal thread section to provide thrust to the insertion rod 5, allowing the insertion rod 5 to move horizontally outside the inner cylinder 11 to adjust the length of the insertion rod 5 at the lower end of the connecting sleeve 3.

[0042] Both the lower end of the main body 1 and the upper end of the connecting sleeve 3 are provided with a protruding ring 17. The outer wall of the protruding ring 17 is equipped with a bearing 12. The outer walls of the protruding ring 17 on the main body 1 and the connecting sleeve 3 are respectively embedded in the two ends of the adjusting sleeve 2, so as to facilitate the rotatable connection between the adjusting sleeve 2 and the main body 1 and the connecting sleeve 3, thereby improving the firmness of the connection of the adjusting sleeve 2.

[0043] Multiple adjusting protrusions 10 are fixed at equal angles on the outer wall of the adjusting sleeve 2. The side of the connecting rod 6 is arranged in a U-shape. The adjusting protrusions 10 are located inside the connecting rod 6, which makes it easy to manually rotate the adjusting sleeve 2 by adjusting the protrusions 10, thereby improving the convenience of adjusting the sowing depth.

[0044] The foot pedal assembly 4 includes a fixing block 401 and a pedal 402. One end of the pedal 402 has an integrally formed protrusion 403. The fixing block 401 is fixed to the outer wall of the connecting sleeve 3. The upper end of the fixing block 401 has a notch for the protrusion 403 to enter. The protrusion 403 is rotatably connected to the inside of the notch through a pin 404. The installation direction of the pedal 402 is perpendicular to the installation direction of the handle 9. When in use, at least one pedal 402 should be rotated according to personal habits so that the pedal 402 is perpendicular to the fixing block 401. Then, the foot pedal 402 is used to apply a pushing force to the insertion rod 5 through the foot force, so that the insertion rod 5 can be inserted into the ground to complete the sowing. When not in use, the pedal 402 can be folded so that the pedal 402 is parallel to the adjusting sleeve 2, so that the pedal 402 can be folded and stored.

[0045] In use, manually rotate the adjusting sleeve 2 according to actual sowing needs, causing the adjusting sleeve 2 to move the insert rod 5 downwards. At this time, the limiting rod 88 is adjusted to the upper end of the third slide groove 18, and the adjusting sleeve 2 can no longer be rotated. Then, rotate the lifting rod 81 through the handle 83. Utilizing the threaded engagement between the lifting rod 81 and the lead screw 86, the lead screw 86 is moved downwards, causing the lead screw 86 to move the limiting rod 88 to the lower end of the third slide groove 18. If the planting depth is insufficient, rotate the adjusting sleeve 2 again and repeat the above actions to adjust the length of the insert rod 5 under the connecting sleeve 3 to the required length, and adjust the conical anti-blocking block 87. Adjust the angled opening and use the length of the insert rod 5 to change the sowing depth. When sowing, flip at least one pedal 402 according to personal habits, step on the pedal 402 to insert the insert rod 5 into the ground, and then put the soybean seeds into the cavity through the feed hopper 7. Then, lift the lifting rod 81 upward through the handle 83, so that the lifting rod 81 drives the conical anti-blocking block 87 and the stop block 85 to move upward at the same time. There are gaps between the discharge hole 15 and the stop block 85, and between the angled opening and the conical anti-blocking block 87. The seeds pass through the gaps and enter the hole where the insert rod 5 is inserted, so as to complete the soil breaking and sowing work at the same time.

[0046] It should be noted that the length of the main body 1 is set according to actual usage needs, so that the planter can be used by people for planting. Moreover, this planter is not limited to planting soybeans, but can also be used to plant other particulate agricultural products or for topdressing.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A soybean planter with adjustable planting depth, characterized in that: The device includes a main body (1), the lower end of which is integrally formed with an inner cylinder (11). A hollow insert rod (5) is slidably connected to the outer wall of the inner cylinder (11). An adjusting sleeve (2) is threadedly connected to the outside of the insert rod (5). A connecting sleeve (3) is provided below the adjusting sleeve (2). Both ends of the adjusting sleeve (2) are rotatably connected to the lower end of the main body (1) and the upper end of the connecting sleeve (3) respectively through bearings (12). The outer wall of the connecting sleeve (3) is fixed to the lower end of the main body (1) through two connecting rods (6), so that the adjusting sleeve (2) drives the insert rod (5) to move downward or upward when rotating. The lower end of the insert rod (5) passes through the connecting sleeve (3) and is provided with a sharp corner. The lower end of the sharp corner is provided with a bevel. The main body (1) has a cavity communicating with the inner cylinder (11). The upper end of the cavity is connected to a feed hopper (7). The lower end of the inner cylinder (11) has a funnel-shaped discharge hole (15) communicating with the inside of the insert rod (5). A movable lifting assembly (8) is installed inside the cavity. The upper end of the lifting assembly (8) extends through the top wall of the main body (1) to the outside of the main body (1). A reset mechanism (84) is installed on the lifting assembly (8) at the upper end of the cavity to reset the position of the lifting assembly (8). The mechanism (84) is slidably connected to the inner wall of the cavity. The lower end of the lifting component (8) is equipped with an anti-blocking mechanism to prevent the insertion rod (5) from being blocked. The anti-blocking mechanism is slidably installed inside the insertion rod (5), and the upper end of the anti-blocking mechanism is threadedly connected to the lifting component (8), so that the anti-blocking mechanism can move up or down with the lifting component (8). When the lifting component (8) rotates, the length of the anti-blocking mechanism can be adjusted. Two foldable foot pedal components (4) are installed on the outer wall of the connecting sleeve (3). A handle (9) is fixed on the upper side wall of the main body (1). The lifting assembly (8) includes a lifting rod (81), which is movably inserted into the cavity. The upper end of the lifting rod (81) passes through the upper end of the main body (1) and is fixed with a connecting plate (82). The upper end of the connecting plate (82) is fixed with a handle (83). The lower end of the lifting rod (81) is fixed with a tapered stop (85). The lower end of the stop (85) matches the opening of the feeding hole (15). The upper end of the main body (1) is provided with a through hole (16) for the lifting rod (81) to pass through. The anti-blocking mechanism includes a conical anti-blocking block (87) with a pointed lower end. A lead screw (86) is fixed to the upper end of the conical anti-blocking block (87). The upper end of the lead screw (86) is threadedly connected to the inside of the insert rod (5). The lower end of the insert rod (5) has a threaded through hole (16) for the upper end of the lead screw (86) to be threadedly connected. The lower end of the lead screw (86) is slidably connected to the inner wall of the insert rod (5).

2. The soybean planter with adjustable planting depth according to claim 1, characterized in that: The reset mechanism (84) includes a cone block (841) and a spring (842). The cone block (841) is rotatably sleeved on the outer wall of the lifting rod (81). The spring (842) is located between the cone block (841) and the top wall of the cavity. A limit block (843) is fixed on one side of the cone block (841). A second slide groove is provided on the inner wall of the cavity for the limit block (843) to slide. When the spring (842) is not compressed, the limit block (843) is located at the lower end of the second slide groove. When the spring (842) is compressed, the limit block (843) is located at the upper end of the second slide groove.

3. The soybean planter with adjustable planting depth according to claim 2, characterized in that: A limiting rod (88) is fixed to the lower outer wall of the lead screw (86), and a third sliding groove (18) is provided inside the insert rod (5) for one end of the limiting rod (88) to slide. The length of the third sliding groove (18) is the same as the length of the second sliding groove.

4. The soybean planter with adjustable planting depth according to claim 3, characterized in that: Two sliders (13) are symmetrically fixed on the inner wall of the upper end of the insert (5), and a first groove (14) is provided on the outer wall of the inner cylinder (11) for the two sliders (13) to slide.

5. A soybean planter with adjustable planting depth according to claim 4, characterized in that: The outer wall of the insert rod (5) is provided with an external thread section, and the inner wall of the adjusting sleeve (2) is provided with an internal thread that matches the external thread section.

6. A soybean planter with adjustable planting depth according to claim 5, characterized in that: The lower end of the main body (1) and the upper end of the connecting sleeve (3) are provided with a convex ring (17). The outer wall of the convex ring (17) is equipped with a bearing (12). The outer walls of the convex ring (17) on the main body (1) and the connecting sleeve (3) are respectively embedded in the two ends of the adjusting sleeve (2).

7. A soybean planter with adjustable planting depth according to claim 6, characterized in that: The outer wall of the adjusting sleeve (2) is fixed with multiple adjusting protrusions (10) at equal angles. The side of the connecting rod (6) is arranged in a U-shape, and the adjusting protrusions (10) are located on the inner side of the connecting rod (6).

8. A soybean planter with adjustable planting depth according to claim 7, characterized in that: The foot pedal assembly (4) includes a fixing block (401) and a pedal (402). One end of the pedal (402) is integrally formed with a protrusion (403). The fixing block (401) is fixed to the outer wall of the connecting sleeve (3). The upper end of the fixing block (401) is provided with a notch for the protrusion (403) to enter. The protrusion (403) is rotatably connected to the inside of the notch by a pin (404).

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