Rapidly replace the seed disc of rice pneumatic seed metering device

Abstract

A quick replacement seed suction disc rice pneumatic seed metering device, including seed metering device shell, seed metering shaft mechanism, seed supply mechanism, seed suction disc, brush, seed metering device shell includes each other buckle air suction shell and seed metering shell, seed metering shaft mechanism with air suction shell rotatable type connection drive seed suction disc relative to air suction shell rotation, seed metering device still includes cam locking mechanism, shaft sleeve, rubber ring, pressure ring, end cover, air suction shell and seed metering shell are connected through cam locking mechanism, shaft sleeve includes annular portion and sleeve portion, shaft sleeve is sleeved on seed metering shaft mechanism, annular portion is located inside sleeve portion, seed suction disc, rubber ring, pressure ring are sequentially sleeved on sleeve portion from inside to outside, end cover is screwed with the end of seed metering shaft mechanism through thread, end cover is pressed tightly pressure ring, the present application has the advantages of simple structure, easy to realize, can quickly replace seed suction disc, has better adaptability to different seeding rate of different varieties of rice, belongs to the field of agricultural machinery.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery, and specifically to a pneumatic rice seed metering device with a quick-change seed suction disc. Background Technology

[0002] Direct seeding of rice is one of the important development directions of mechanized rice cultivation in my country. Currently, mechanized rice cultivation in my country is mainly divided into two methods: transplanting and direct seeding. Direct seeding can reduce the input of procedures and costs, and shorten the growth cycle.

[0003] Different rice varieties not only differ in shape but also in subtle physical characteristics, requiring slightly different internal structures in seed metering devices, particularly the seed metering disc. However, current seed metering devices based on the same principle often only meet the sowing requirements of one crop; a completely new seed metering device is needed for another crop. To ensure the adaptability of seed metering devices to different rice varieties and seeding rates, replacing the seed disc with a suitable one becomes an efficient and low-cost method. Summary of the Invention

[0004] In view of the technical problems existing in the prior art, the purpose of this invention is to provide a pneumatic rice seed metering device with a quick-change seed suction plate, which can efficiently and conveniently replace the seed suction plate in the seed metering device and improve the adaptability of the seed metering device to different rice varieties and sowing rates.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pneumatic rice seed metering device with a quick-change seed suction plate includes a seed metering device housing, a seed metering shaft mechanism, a seed supply mechanism, a seed suction plate, and a brush. The seed metering device housing includes an interlocking air suction housing and a seed metering housing. The seed metering shaft mechanism is rotatably connected to the air suction housing, causing the seed suction plate to rotate relative to the air suction housing. The brush is installed inside the seed metering housing. The seed supply mechanism is connected to the seed metering housing. The seed metering device also includes a cam locking mechanism, a bushing, a rubber ring, a pressure ring, and an end cap. The air suction housing and the seed metering housing are quickly connected via the cam locking mechanism. The bushing includes an annular portion and a sleeve portion. The bushing is sleeved on the seed metering shaft mechanism. The annular portion is located inside the sleeve portion. The seed suction plate, rubber ring, and pressure ring are sequentially sleeved on the sleeve portion from the inside to the outside. The end cap is threaded to the end of the seed metering shaft mechanism, and the end cap presses against the pressure ring.

[0007] As a preferred embodiment, the seed metering shaft mechanism includes a seed metering shaft, a shaft retaining ring I, a shaft retaining ring II, a bearing, a key I, and a key II; the seed metering shaft includes a first shaft section, a second shaft section, a third shaft section, and an external thread section; a sprocket is mounted on the first shaft section, the shaft retaining ring I is sleeved on the first shaft section to restrict the axial outward movement of the sprocket, and the key I restricts the rotation of the sprocket relative to the seed metering shaft; the bearing is sleeved on the second shaft section, and the air suction housing is rotatably connected to the second shaft section through the bearing; the shaft retaining ring II is sleeved on the second shaft section to restrict the axial displacement of the seed metering shaft relative to the air suction housing; a shaft sleeve is sleeved on the third shaft section, and the key II restricts the rotation of the shaft sleeve relative to the seed metering shaft; an end cap is mounted on the external thread section.

[0008] As a preferred embodiment, the air intake housing and the second shaft section are connected by dual bearings.

[0009] As a preferred embodiment, the annular portion of the bushing is provided with a positioning pin, and the seed suction plate is provided with a positioning hole. The positioning hole fits onto the positioning pin, thereby restricting the relative rotation of the bushing and the seed suction plate.

[0010] As a preferred option, the rubber ring is made of elastic rubber material to provide pre-tightening force; when the pressure ring is compressed, the annular part of the bushing, the seed suction plate, the rubber ring, and the pressure ring are pressed tightly together in sequence.

[0011] As a preferred embodiment, the cam locking mechanism includes a T-shaped rod, a bolt, and a cam, both of which rotate around the bolt. One end of the T-shaped rod is connected to the bolt, and the other end is engaged in a groove in the air suction housing. One end of the cam is connected to the bolt, and the other end is engaged in a groove in the seed metering housing. By adjusting the angle of contact between the cam and the seed metering housing, the air suction housing and the seed metering housing are locked.

[0012] As a preferred embodiment, the number of cam locking mechanisms is three, the number of grooves in the air suction housing is three, and the number of grooves in the seed dispensing housing is three.

[0013] As a preferred embodiment, the groove of the air suction shell is a T-shaped rod groove; a rubber pad is provided on one side of the groove of the seed metering shell, and the cam presses on the rubber pad.

[0014] As a preferred option, the seed metering housing can be quickly opened via a cam locking mechanism, and the seed metering disc can be quickly removed and replaced by unscrewing the end cover and taking out the pressure ring and rubber ring.

[0015] As a preferred option, seed metering trays come in various models to correspond to different rice varieties and seeding rates.

[0016] The present invention has the following advantages:

[0017] 1. By replacing the corresponding seed suction plate, the adaptability of the seed metering device to different rice varieties and different seeding rates can be improved. The structure of the shell, seed supply mechanism, etc. does not need to be changed, which can reduce costs, increase practicality, and improve efficiency.

[0018] 2. Double bearings are used as the rotational support for the seed metering shaft, and both bearings are installed at the center of the air suction housing to ensure stability during operation. Furthermore, with the help of the shaft retaining ring, the various parts installed on the seed metering shaft mechanism can be removed without disassembling the bearings, thus improving the efficiency of changing discs.

[0019] 3. The end cap and the seed metering shaft are connected by threads, which improves the stability of the seed metering shaft mechanism and its parts, and also makes it easy to disassemble and replace the seed metering disc.

[0020] 4. A rubber ring is installed between the seed suction plate and the pressure ring. Under the action of the pressure ring, the rubber ring is tightly attached to the seed suction plate and the pressure ring, providing pre-tightening force during assembly, making the various parts installed on the seed dispensing shaft structure more secure and with stronger integration.

[0021] 5. A cam locking mechanism is used to connect the seed metering housing and the air suction housing together, which can not only ensure the integrity of the seed metering housing during operation, but also make it easy and quick to disassemble the seed metering housing.

[0022] 6. A rubber pad is provided at the mounting cam of the seed metering housing. This pad can prevent the cam from slipping due to external vibration by providing greater friction, and at the same time provide elasticity to make the connection between the air suction housing and the seed metering housing tighter. Attached Figure Description

[0023] Figure 1 This is an exploded view of the parts of the structure of this invention.

[0024] Figure 2 This is a schematic diagram of the seed metering device.

[0025] Figure 3 This is a schematic diagram of the seed metering shaft mechanism.

[0026] Figure 4 This is an assembly diagram of the seed metering shaft mechanism.

[0027] Figure 5 This is a schematic diagram of a cam locking mechanism.

[0028] Figure 6 This is a schematic diagram of the bushing structure.

[0029] Figure 7 This is a side view of the air intake housing.

[0030] Figure 8 This is a side view of the seed metering shell.

[0031] The following components are labeled in the diagram: 1. Air suction housing, 111. T-shaped rod groove, 2. Sprocket, 3. Seed feeding shaft mechanism, 31. Seed feeding shaft, 32. Shaft retaining ring I, 33. Shaft retaining ring II, 34. Bearing, 35. Key I, 36. Key II, 37. External thread section, 4. Shaft sleeve, 41. Positioning pin, 5. Seed suction plate, 6. Rubber ring, 7. Pressure ring, 8. Cam locking mechanism, 81. T-shaped rod, 82. Bolt, 83. Cam, 9. End cover, 10. Seed feeding housing, 101. Rubber pad, 11. Seed supply mechanism, 12. Anti-clogging brush, 13. Isolation brush, 14. Seed feeding tube. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to specific embodiments.

[0033] A pneumatic rice seed metering device with a quick-change seed suction plate includes a seed metering device housing, a seed metering shaft mechanism, a seed supply mechanism, a seed suction plate, and brushes (including anti-clogging brushes and isolation brushes). The seed metering device housing includes an interlocking air suction housing and a seed metering housing. The seed metering shaft mechanism is rotatably connected to the air suction housing, driving the seed suction plate to rotate relative to the air suction housing. The brushes (including anti-clogging brushes and isolation brushes) are installed inside the seed metering housing. The seed supply mechanism is connected to the seed metering housing. The seed metering device also includes a cam locking mechanism, a bushing, a rubber ring, a pressure ring, and an end cap. The air suction housing and the seed metering housing are quickly connected via the cam locking mechanism. The bushing includes an annular portion and a sleeve portion. The bushing is sleeved on the seed metering shaft mechanism. The annular portion is located inside the sleeve portion. The seed suction plate, rubber ring, and pressure ring are sequentially sleeved on the sleeve portion from the inside to the outside. The end cap is threaded to the end of the seed metering shaft mechanism, and the end cap presses against the pressure ring.

[0034] The seed metering shaft mechanism includes a seed metering shaft, a shaft retaining ring I, a shaft retaining ring II, a bearing, a key I, and a key II. The seed metering shaft includes a first shaft section, a second shaft section, a third shaft section, and an external thread section. A sprocket is installed on the first shaft section, and the shaft retaining ring I is fitted onto the first shaft section to restrict the axial outward movement of the sprocket. Key I restricts the rotation of the sprocket relative to the seed metering shaft. The bearing is fitted onto the second shaft section, and the air suction housing is rotatably connected to the second shaft section through the bearing. The shaft retaining ring II is fitted onto the second shaft section to restrict the axial displacement of the seed metering shaft relative to the air suction housing. A bushing is fitted onto the third shaft section, and key II restricts the rotation of the bushing relative to the seed metering shaft. An end cap is installed on the external thread section.

[0035] The air suction housing and the second shaft section are connected by double bearings.

[0036] The annular part of the bushing is equipped with a positioning pin, and the seed suction plate is equipped with a positioning hole. The positioning hole fits onto the positioning pin, thereby restricting the relative rotation of the bushing and the seed suction plate.

[0037] The rubber ring is made of elastic rubber material to provide pre-tightening force; when the pressure ring is compressed, the annular part of the bushing, the seed suction plate, the rubber ring, and the pressure ring are pressed tightly together in sequence.

[0038] The cam locking mechanism includes a T-shaped rod, a bolt, and a cam. Both the T-shaped rod and the cam rotate around the bolt. One end of the T-shaped rod is connected to the bolt, and the other end is engaged in the groove of the air suction housing. One end of the cam is connected to the bolt, and the other end is engaged in the groove of the seed metering housing. By adjusting the angle of contact between the cam and the seed metering housing, the air suction housing and the seed metering housing are locked.

[0039] There are three sets of cam locking mechanisms, three grooves in the air suction housing, and three grooves in the seed dispensing housing.

[0040] The groove of the air suction shell is a T-shaped rod groove; a rubber pad is provided on one side of the groove of the seed metering shell, and the cam presses on the rubber pad.

[0041] The seed metering housing can be quickly opened by a cam locking mechanism, and the seed metering disc can be quickly removed and replaced by unscrewing the end cover and taking out the pressure ring and rubber ring.

[0042] There are various models of seed metering trays to correspond to different rice varieties and seeding rates.

[0043] The operation process of this invention is divided into before sowing and after sowing.

[0044] Before sowing, select a suitable rice variety based on the field environment, and also select a seed suction tray 5 suitable for the rice variety and sowing rate. Adjust the cam locking mechanism 8 so that the cam 83 rotates around the bolt 82 in a direction parallel to the T-shaped rod 81, unlocking the preload of the cam locking mechanism 8, and remove the three sets of cam locking mechanisms 8 evenly distributed on the seed metering housing 10. Remove the seed metering housing 10 axially along the seed metering shaft 31. Fix the sprocket 2, rotate it counterclockwise and remove the end cover 9. Then remove the pressure... Install the pressure ring 7, rubber ring 6, and seed suction plate 5; install the pre-selected seed suction plate 5 onto the bushing 4, ensuring the positioning pins 41 on the bushing 4 correspond to the positioning holes on the seed suction plate 5; install the rubber ring 6 and pressure ring 7 in sequence, and tighten the end cap 9 clockwise; install the seed metering housing 10 onto the air suction housing; finally, install three sets of cam locking mechanisms 8 in the corresponding positions; add the pre-selected rice seeds into the seed supply mechanism 11, rotate the seed metering shaft 31 counterclockwise, and maintain normal air pressure at both the positive and negative pressure ports of the seed meterer to check if it can work normally. This completes the quick seed suction plate replacement operation before rice sowing.

[0045] After sowing, adjust the cam locking mechanism 8 so that the cam 83 rotates around the bolt in a direction parallel to the T-shaped rod 81, unlocking the preload of the cam locking mechanism 8 and removing the three sets of cam locking mechanisms 8 evenly distributed around the seed metering housing 10; remove the seed metering housing 10 axially along the seed metering shaft 31 to discharge the rice seeds remaining inside the seed meterer, and install the seed metering housing 10 onto the air suction housing 1; finally, install the three sets of cam locking mechanisms at corresponding positions on the seed metering housing 10 and the air suction housing 1. This completes the seed unloading operation after rice sowing.

[0046] This invention has a simple structure, is easy to implement, allows for quick replacement of the seed suction plate, and has good adaptability to different seeding rates for different rice varieties.

[0047] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A pneumatic rice seed metering device with a quick-changing seed suction plate, comprising a seed metering device housing, a seed metering shaft mechanism, a seed supply mechanism, a seed suction plate, and a brush; the seed metering device housing includes an interlocking air suction shell and a seed metering shell, the seed metering shaft mechanism being rotatably connected to the air suction shell to drive the seed suction plate to rotate relative to the air suction shell; the brush is installed inside the seed metering shell; the seed supply mechanism is connected to the seed metering shell, characterized in that: The seed metering device also includes a cam locking mechanism, a bushing, a rubber ring, a pressure ring, and an end cap; the air suction housing and the seed metering housing are connected by a cam locking mechanism in a quick-release manner; the bushing includes an annular part and a sleeve part, the bushing is sleeved on the seed metering shaft mechanism, the annular part is located inside the sleeve part, the seed suction disc, rubber ring, and pressure ring are sleeved on the sleeve part from the inside to the outside in sequence, and the end cap is screwed to the end of the seed metering shaft mechanism by threads, and the end cap presses against the pressure ring; The seed metering housing can be quickly opened by the cam locking mechanism, and the seed metering disc can be quickly removed and replaced by unscrewing the end cover and taking out the pressure ring and rubber ring. The cam locking mechanism includes a T-shaped rod, a bolt, and a cam. Both the T-shaped rod and the cam rotate around the bolt. One end of the T-shaped rod is connected to the bolt, and the other end is engaged in the groove of the air suction housing. One end of the cam is connected to the bolt, and the other end is engaged in the groove of the seed metering housing. By adjusting the angle of contact between the cam and the seed metering housing, the air suction housing and the seed metering housing are locked.

2. A pneumatic rice seed metering device with a quick-changing seed suction plate as described in claim 1, characterized in that: The seed metering shaft mechanism includes a seed metering shaft, a shaft retaining ring I, a shaft retaining ring II, a bearing, a key I, and a key II. The seed metering shaft includes a first shaft section, a second shaft section, a third shaft section, and an external thread section. A sprocket is installed on the first shaft section, and the shaft retaining ring I is fitted onto the first shaft section to restrict the axial outward movement of the sprocket. Key I restricts the rotation of the sprocket relative to the seed metering shaft. The bearing is fitted onto the second shaft section, and the air suction housing is rotatably connected to the second shaft section through the bearing. The shaft retaining ring II is fitted onto the second shaft section to restrict the axial displacement of the seed metering shaft relative to the air suction housing. A bushing is fitted onto the third shaft section, and key II restricts the rotation of the bushing relative to the seed metering shaft. An end cap is installed on the external thread section.

3. A pneumatic rice seed metering device with a quick-changing seed suction plate as described in claim 2, characterized in that: The air suction housing and the second shaft section are connected by double bearings.

4. A pneumatic rice seed metering device with a quick-changing seed suction plate as described in claim 1, characterized in that: The annular part of the bushing is equipped with a positioning pin, and the seed suction plate is equipped with a positioning hole. The positioning hole fits onto the positioning pin, thereby restricting the relative rotation of the bushing and the seed suction plate.

5. A pneumatic rice seed metering device with a quick-changing seed suction plate as described in claim 1, characterized in that: The rubber ring is made of elastic rubber material to provide pre-tightening force; when the pressure ring is compressed, the annular part of the bushing, the seed suction plate, the rubber ring, and the pressure ring are pressed tightly together in sequence.

6. A pneumatic rice seed metering device with a quick-changing seed suction plate as described in claim 1, characterized in that: There are three sets of cam locking mechanisms, three grooves in the air suction housing, and three grooves in the seed dispensing housing.

7. A pneumatic rice seed metering device with a quick-changing seed suction plate as described in claim 1, characterized in that: The groove of the air suction shell is a T-shaped rod groove; a rubber pad is provided on one side of the groove of the seed metering shell, and the cam presses on the rubber pad.

8. A pneumatic rice seed metering device with a quick-changing seed suction plate as described in claim 1, characterized in that: There are various models of seed metering trays to correspond to different rice varieties and seeding rates.

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