A depth limiting device for a seeder

Abstract

This utility model relates to the field of seeding equipment technology, specifically to a depth limiting device for a seeder. It includes a furrow opener connecting frame, a mounting plate connected to the top of the furrow opener connecting frame via a four-bar linkage, a furrow opening section at the bottom of the furrow opener connecting frame, a covering wheel connecting frame slidably connected to one side of the furrow opener connecting frame, a covering roller installed at the end of the covering wheel connecting frame, an adjusting rod hinged to the middle of the covering wheel connecting frame, and a limiter connecting frame fixedly connected to the middle of the furrow opener connecting frame. When the covering wheel encounters a protrusion and presses down or encounters a depression and bounces up, the synchronous connecting plate compresses the lower or upper limiting springs respectively. The reverse force generated by the springs instantly "push" or "pull" the covering wheel back to its normal position. This significantly reduces the bounce range of the covering wheel, thereby ensuring uniform and stable soil covering depth, which is beneficial for consistent seed coverage and improves germination rate.

Description

Technical Field

[0001] This utility model relates to the field of seeding equipment technology, specifically to a depth limiting device for a seeder. Background Technology

[0002] Sowing depth directly affects crop emergence time and rate, and is one of the key factors determining yield. Maintaining a stable sowing depth during planting, ensuring it doesn't fluctuate with ground undulations or soil firmness, helps guarantee uniform and consistent emergence. This promotes a healthy crop canopy structure, allowing for more efficient use of light energy, enhanced photosynthesis, and ultimately, higher yields.

[0003] Different crops have optimal sowing depths. For example, grains like wheat are best sown shallowly, while corn and soybeans require deeper sowing. Precisely controlling the relative height difference between the furrow opener and the covering wheel determines the sowing depth that affects crop emergence and growth. When the covering wheel operates on uneven ground, it continuously impacts the undulating areas, causing longitudinal vibration. This vibration is more pronounced in hard soil or with large clods. Too thin a covering layer exposes the seeds or results in poor contact with the soil, hindering germination; too thick a layer increases the difficulty of seedling emergence. Simultaneously, this longitudinal vibration weakens the compaction effect, leading to poor seed-soil contact and impaired water absorption.

[0004] Therefore, it is necessary to invent a depth limiting device for a seeder to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a depth limiting device for a seeder, which solves the problem of not being able to effectively ensure uniform soil covering when the longitudinal jumping amplitude is large during actual use by limiting the jumping range in the upper and lower directions.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A depth limiting device for a seeder includes a furrow opener connecting frame. A mounting plate is connected to the top of the furrow opener connecting frame via a four-bar linkage. A furrow opening section is provided at the bottom of the furrow opener connecting frame. A covering wheel connecting frame is slidably connected to one side of the furrow opener connecting frame. A covering roller is installed at the end of the covering wheel connecting frame. An adjusting rod is hinged to the middle of the covering wheel connecting frame. A limiter connecting frame is fixedly connected to the middle of the furrow opener connecting frame. Multiple limiting components for limiting the adjusting rod are fixedly installed on one side of the limiter connecting frame.

[0007] In a preferred embodiment of this utility model, the limiting component includes a limiting tube, a synchronous connecting plate, and a limiting spring. The limiting tube is fixedly connected to the limiting device connecting structure. The limiting tubes are located on both sides of the adjusting rod. The synchronous connecting plate is slidably connected to the limiting tubes on both sides. The synchronous connecting plate is detachably connected to the adjusting rod. The limiting spring is located inside the limiting tube and on both sides of the synchronous connecting plate.

[0008] As a preferred embodiment of this utility model, the two ends of the limiting tube are respectively provided with adjustment devices. The adjustment device includes a pressure plate that is fixedly connected to the limiting spring. The pressure plate is located on the side away from the synchronous connecting plate. The two ends of the limiting tube are threadedly connected with adjustment bolts, and the ends of the adjustment bolts are rotatably connected to the pressure plate.

[0009] As a preferred embodiment of this utility model, a baffle is provided at one end of the limiting spring near the synchronous connecting plate, a locking groove is provided on the side of the adjusting rod, and a locking block is provided on one side of the locking groove to form a fixed connection with the synchronous connecting plate. The locking block and the locking groove are detachably connected by bolts.

[0010] As a preferred embodiment of this utility model, the soil covering wheel connecting frame has a waist-shaped groove on the side near the trencher connecting frame, and a limiting post is provided on one side of the soil covering wheel connecting frame, the limiting post being slidably connected inside the waist-shaped groove.

[0011] As a preferred embodiment of this utility model, a positioning plate is provided in the middle of the soil covering wheel connecting frame, and the bottom end of the adjusting rod is hinged to the positioning plate.

[0012] In a preferred embodiment of this utility model, one end of the limiter connecting frame extends downward and is sleeved on the outside of the adjusting rod, and the adjusting rod and the extended end of the limiter connecting frame are slidably connected.

[0013] As a preferred embodiment of this utility model, an observation window is provided on the outer side of the limiting tube to facilitate observation of the compression range of the limiting spring.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows: In this invention, the longitudinal movement of the covering wheel is effectively suppressed by the double-spring limiting mechanism, ensuring its close contact with the ground. When the covering wheel encounters a protrusion and presses down or encounters a depression and bounces up, the synchronous connecting plate compresses the lower or upper limiting springs respectively. The reverse force generated by the springs can immediately "push" or "pull" the covering wheel back to its normal position. This significantly reduces the running range of the covering wheel, thereby ensuring uniform and stable soil covering depth, which is beneficial for consistent seed coverage and improves germination rate. By rotating the adjusting bolts at both ends of the limiting tube, the pre-compression of the upper and lower limiting springs can be changed respectively, thereby flexibly adjusting the allowable longitudinal running range of the covering wheel to adapt to different soil conditions, sowing speeds, or agronomic requirements. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the trenching section and the soil covering roller structure of this utility model; Figure 2 This is a schematic diagram of the position structure of the limiting component of this utility model; Figure 3 This is a schematic diagram of the internal structure of the limiting component of this utility model; Figure 4 This is a schematic diagram of the position and structure of the limiter connecting frame of this utility model.

[0016] Explanation of reference numerals in the attached drawings: 1. Mounting plate; 3. Four-bar linkage assembly; 5. Trencher connecting frame; 501. Limiter connecting frame; 6. Trenching section; 7. Covering wheel connecting frame; 701. Waist-shaped groove; 702. Positioning plate; 703. Adjusting rod; 704. Locking groove; 8. Covering roller; 10. Limiting assembly; 1001. Limiting tube; 1002. Pressure plate; 1003. Baffle; 1004. Limiting spring; 1005. Synchronous connecting plate; 1006. Locking block; 1007. Observation window; 1008. Adjusting bolt. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0018] This utility model provides, for example Figure 1-4The illustrated seeding depth limiting device includes a furrow opener connecting frame 5. The top of the furrow opener connecting frame 5 is connected to a mounting plate 1 via a four-bar linkage 3. The bottom of the furrow opener connecting frame 5 is provided with a furrow opening section 6. A soil covering wheel connecting frame 7 is slidably connected to one side of the furrow opener connecting frame 5. A soil covering roller 8 is installed at the end of the soil covering wheel connecting frame 7. An adjusting rod 703 is hinged to the middle of the soil covering wheel connecting frame 7. A limiter connecting frame 501 is fixedly connected to the middle of the furrow opener connecting frame 5. A plurality of limiting components 10 for limiting the adjusting rod 703 are fixedly installed on one side of the limiter connecting frame 501. Mounting plate 1 is installed at the end of the vehicle body. A cylinder is set at the top of the plate. The cylinder lifts the four-bar linkage 3, thereby adjusting the overall height of the trencher connecting frame 5. While the trencher connecting frame 5 is adjusting its position, it can simultaneously drive the soil covering wheel connecting frame 7 to adjust. The trencher connecting frame 5 and the four-bar linkage 3 are hinged together to form a parallel four-bar mechanism, which can effectively adapt to the terrain.

[0019] The limiting component 10 includes a limiting tube 1001, a synchronous connecting plate 1005, and a limiting spring 1004. The limiting tube 1001 is fixedly connected to the limiting device connecting frame 501. The limiting tubes 1001 are located on both sides of the adjusting rod 703. The synchronous connecting plate 1005 is slidably connected to the limiting tubes 1001 on both sides. The synchronous connecting plate 1005 is detachably connected to the adjusting rod 703. The limiting spring 1004 is located inside the limiting tube 1001 and on both sides of the synchronous connecting plate 1005. The sliding arrangement of the synchronous connecting plate 1005 inside the limiting tube 1001 and the setting of the limiting spring 1004 at the upper and lower ends of the synchronous connecting plate 1005 can limit the amplitude range of the soil covering roller connecting frame 7 and prevent the soil covering roller 8 from having a large longitudinal jump amplitude.

[0020] Adjustment devices are provided at both ends of the limiting tube 1001. Each adjustment device includes a pressure plate 1002 fixedly connected to the limiting spring 1004. The pressure plate 1002 is located on the side away from the synchronous connecting plate 1005. Adjusting bolts 1008 are threaded to both ends of the limiting tube 1001, and the ends of the adjusting bolts 1008 are rotatably connected to the pressure plate 1002. By rotating the adjusting bolts 1008, the corresponding limiting spring 1004 can be compressed or expanded, allowing the device to adjust the amplitude range according to the sowing requirements.

[0021] When the soil-covering roller 8 encounters a protrusion and presses downwards: the synchronous connecting plate 1005 moves downwards, compressing the lower limiting spring 1004. The lower spring is compressed, generating an upward reaction force, attempting to push the soil-covering roller 8 back.

[0022] When the soil-covering roller 8 encounters a depression and bounces upwards: the synchronous connecting plate 1005 moves upwards, stretching the upper limiting spring 1004. The upper spring is compressed, generating a downward reaction force, attempting to pull the soil-covering roller 8 back to the ground; effectively reducing the longitudinal bounce range of the soil-covering roller 8.

[0023] A baffle 1003 is provided at one end of the limiting spring 1004 near the synchronous connecting plate 1005. A locking groove 704 is provided on the side of the adjusting rod 703. A locking block 1006 is provided on one side of the locking groove 704 and is fixedly connected to the synchronous connecting plate 1005. The locking block 1006 and the locking groove 704 are detachably connected by bolts. By adjusting the position of the locking block 1006 on the adjusting rod 703 and the sliding between the waist-shaped groove 701 and the limiting post, the relative height difference between the trenching part 6 and the soil covering roller 8 can be adjusted.

[0024] The covering roller connecting frame 7 has a waist-shaped groove 701 on one side near the trencher connecting frame 5. A limit post is provided on one side of the covering roller connecting frame 7, and the limit post is slidably connected inside the waist-shaped groove 701. The waist-shaped groove 701 is designed to accommodate the positional changes caused by the longitudinal movement of the covering roller 8 during operation.

[0025] A positioning plate 702 is provided in the middle of the soil covering wheel connecting frame 7, and the bottom end of the adjusting rod 703 is hinged to the positioning plate 702. The hinged design ensures that the adjusting rod 703 can slide longitudinally during the rotation of the soil covering wheel connecting frame 7 around the limiting post, so as to transmit the longitudinal movement of the soil covering roller 8 to the limiting component 10, thereby ensuring the sowing effect.

[0026] One end of the limiter connecting bracket 501 extends downward and is sleeved on the outside of the adjusting rod 703. The adjusting rod 703 and the extended end of the limiter connecting bracket 501 are slidably connected. The slidable connection between the extended end of the limiter connecting bracket 501 and the adjusting rod 703 can guide the rod and ensure accurate force transmission direction.

[0027] The outer side of the limiting tube 1001 is provided with an observation window 1007 for easy observation of the compression range of the limiting spring 1004. The observation window 1007 is set to observe the position of the synchronous connecting plate 1005, as well as the compression range of the limiting spring 1004 above and below it, thereby realizing precise control of the longitudinal movement of the soil covering roller 8.

[0028] This invention effectively suppresses the longitudinal movement of the covering wheel by limiting the double springs in the limiting component 10, ensuring its close contact with the ground. When the covering wheel encounters a protrusion and presses down or encounters a depression and jumps up, the synchronous connecting plate 1005 compresses the lower or upper limiting springs 1004 respectively. The reverse force generated by the springs can immediately "push back" or "pull back" the covering wheel to its normal position. This significantly reduces the jumping range of the covering wheel, thereby ensuring uniform and stable soil covering depth, which is beneficial for consistent seed coverage and improves the germination rate. By rotating the adjusting bolts 1008 at both ends of the limiting tube 1001, the pre-compression amount of the upper and lower limiting springs 1004 can be changed respectively, thereby flexibly adjusting the allowable longitudinal jumping range of the covering wheel to adapt to different soil conditions, sowing speeds, or agronomic requirements.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A depth limiting device for a seeder, characterized in that: The device includes a trencher connecting frame (5), the top of which is connected to a mounting plate (1) via a four-bar linkage (3), the bottom of which is provided with a trenching section (6), a soil covering wheel connecting frame (7) is slidably connected to one side of the trencher connecting frame (5), a soil covering roller (8) is installed at the end of the soil covering wheel connecting frame (7), an adjusting rod (703) is hinged to the middle of the soil covering wheel connecting frame (7), a limiter connecting frame (501) is fixedly connected to the middle of the trencher connecting frame (5), and a plurality of limiting components (10) for limiting the adjusting rod (703) are fixedly installed on one side of the limiter connecting frame (501).

2. The seeding depth limiting device for a seeder according to claim 1, characterized in that: The limiting component (10) includes a limiting tube (1001), a synchronous connecting plate (1005), and a limiting spring (1004). The limiting tube (1001) is fixedly connected to the limiter connecting frame (501). The limiting tubes (1001) are located on both sides of the adjusting rod (703). The synchronous connecting plate (1005) is slidably connected to the limiting tubes (1001) on both sides. The synchronous connecting plate (1005) is detachably connected to the adjusting rod (703). The limiting spring (1004) is located inside the limiting tube (1001) and on both sides of the synchronous connecting plate (1005).

3. A depth limiting device for a seeder according to claim 2, characterized in that: The limiting tube (1001) is provided with adjusting devices at both ends. The adjusting device includes a pressure plate (1002) which is fixedly connected to the limiting spring (1004). The pressure plate (1002) is located on the side away from the synchronous connecting plate (1005). The two ends of the limiting tube (1001) are threadedly connected with adjusting bolts (1008). The ends of the adjusting bolts (1008) are rotatably connected to the pressure plate (1002).

4. A depth limiting device for a seeder according to claim 3, characterized in that: The limiting spring (1004) is provided with a baffle (1003) at one end near the synchronous connecting plate (1005). The side of the adjusting rod (703) is provided with a locking groove (704). A locking block (1006) is provided on one side of the locking groove (704) and is fixedly connected to the synchronous connecting plate (1005). The locking block (1006) and the locking groove (704) are detachably connected by bolts.

5. A depth limiting device for a seeder according to claim 4, characterized in that: The soil covering wheel connecting frame (7) has a waist-shaped groove (701) on one side near the trencher connecting frame (5), and a limiting post is provided on one side of the soil covering wheel connecting frame (7), and the limiting post is slidably connected inside the waist-shaped groove (701).

6. A seeding depth limiting device for a seeder according to claim 3, characterized in that: The middle part of the soil covering wheel connecting frame (7) is provided with a positioning plate (702), and the bottom end of the adjusting rod (703) is hinged to the positioning plate (702).

7. A depth limiting device for a seeder according to claim 3, characterized in that: One end of the limiter connecting bracket (501) extends downward and is sleeved on the outside of the adjusting rod (703), and the adjusting rod (703) and the extended end of the limiter connecting bracket (501) form a sliding connection.

8. A depth limiting device for a seeder according to claim 3, characterized in that: The outer side of the limiting tube (1001) is provided with an observation window (1007) to facilitate observation of the compression range of the limiting spring (1004).

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