Seeder gearbox multi-speed adjustment mechanism

Abstract

This utility model discloses a multi-speed adjustment mechanism for a seeder gearbox. It comprises a main drive shaft A passing through one end of the housing, a driven shaft B passing through the housing at the upper part of the other end, and a driven shaft C passing through the housing below the driven shaft B. On one side of the housing, a replaceable driven sprocket B is mounted on driven shaft B, and a replaceable driven sprocket C is mounted on driven shaft C. Driven sprockets B and C are connected by a driven chain, and a driven chain tensioning mechanism is provided on this side of the housing. On the other side of the housing, two interchangeable drive sprockets of different sizes and positions are mounted on the main drive shaft A, and a driven sprocket is mounted on driven shaft B. The driven sprockets are connected to the drive sprockets closest to the housing via a transmission chain. This utility model, by changing the sprockets with different transmission ratios on the housing, allows a single seeding tray to cover the entire main plant spacing without needing to replace the seeding tray, greatly reducing the labor intensity of changing seeding trays and lowering sowing operation costs.

Description

Technical Field

[0001] This utility model relates to a seeder, specifically to a multi-speed adjustment mechanism for a seeder gearbox. Background Technology

[0002] Air-suction precision seeders achieve precise seeding through adjustments to the air intake system and seed metering disc, saving on high-quality seeds and reducing costs. When sowing crops, the plant spacing varies. Currently, air-suction seeders require changing the seed disc for each plant spacing. To cover all major plant spacings, dozens of seed metering discs are needed, with the transmission ratio changed by altering the meshing gears to achieve the required plant spacing for different crops. However, changing the seed disc requires disassembling and reassembling the connected seed chambers, a cumbersome and inconvenient process due to space constraints. Furthermore, the seed discs are easily damaged during storage, affecting seeding quality and increasing operating costs. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a multi-speed adjustment mechanism for a seeder gearbox, which makes it easy to change sprockets with different transmission ratios to meet the requirements of different crop spacing during sowing.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a multi-speed adjustment mechanism for a seeder gearbox, including a housing, a main drive shaft A passing through the housing at one end, a driven shaft B passing through the housing at the upper part of the other end of the housing, and a driven shaft C passing through the housing below the driven shaft B; on one side of the housing, a replaceable driven sprocket B is provided on the driven shaft B, and a replaceable driven sprocket C is provided on the driven shaft C, the driven sprocket B and the driven sprocket C are connected by a driven chain, and a driven chain tensioning mechanism is provided on the housing on this side; on the other side of the housing, two drive sprockets of different sizes and positions are provided on the main drive shaft A, and a driven sprocket is provided on the driven shaft B, the driven sprocket being connected to the drive sprocket near the housing by a transmission chain.

[0005] The driven chain tensioning mechanism consists of an L-shaped bracket on the housing, with the bracket's rotation shaft mounted on the housing. Bracket sprockets are located at both ends of the bracket, and the driven chain passes over the two bracket sprockets.

[0006] A plant spacing reference table for the seeder is also provided on the shell.

[0007] This utility model employs a multi-speed adjustment mechanism for the seeder gearbox designed using the aforementioned technical solution. By installing sprockets with different transmission ratios on the gearbox housing, a single seeding disc can cover the entire main plant spacing without the need to replace the seeding disc, greatly reducing the labor intensity of tedious disc replacement and lowering sowing operation costs. This utility model has a simple and compact structure, stable and reliable transmission, and can achieve multiple transmission ratios to meet the sowing requirements of the seeder for different plant spacings. Attached Figure Description

[0008] Figure 1 A three-dimensional structural diagram showing one side of this utility model;

[0009] Figure 2 express Figure 1 A front view structural diagram;

[0010] Figure 3 A three-dimensional structural diagram showing the other side of this utility model;

[0011] Figure 4 express Figure 3 A front view structural diagram;

[0012] Figure 5 This is a schematic diagram showing multiple spare sprockets of this utility model.

[0013] In the diagram: 1-House, 2-Main drive shaft A, 3-Drive chain, 4-Driven sprocket B, 5-Driven shaft B, 6-Driven chain, 7-Driven sprocket C, 8-Driven shaft C, 9-Bracket sprocket, 10-Bracket, 11-Rotating shaft, 12-Bracket sprocket, 13-Drive sprocket, 14-Drive sprocket, 15-Driven sprocket. Detailed Implementation

[0014] The multi-speed adjustment mechanism of the seeder gearbox of this utility model will be described in detail below with reference to the accompanying drawings.

[0015] This utility model relates to a multi-speed adjustment mechanism for a seeder gearbox. (See also...) Figure 1 and Figure 5 The device includes a housing 1, a main drive shaft A 2 passing through the housing 1 at one end, a driven shaft B 5 passing through the housing 1 at the upper part of the other end of the housing 1, and a driven shaft C 8 passing through the housing 1 below the driven shaft B 5.

[0016] On one side of housing 1, see Figure 1 and Figure 2A replaceable driven sprocket B4 is mounted on driven shaft B5, and a replaceable driven sprocket C7 is mounted on driven shaft C8. Driven sprockets B4 and C7 are connected by a driven chain 6. This invention includes a driven chain tensioning mechanism on the housing 1 on this side. The tensioning mechanism consists of an L-shaped bracket 10 on the housing 1, with a rotating shaft 11 mounted on the housing 1. Support sprockets 9 and 12 are located at both ends of the bracket 10, and the driven chain 6 passes around the support sprockets 9 and 12. The rotating shaft 11, as the core component for power transmission, must withstand torque and bending moment to support the mechanical parts in rotational motion. When different driven sprockets B and C are replaced, the tensioning mechanism can be used to tension the driven chain 6 by twisting the rotating shaft 11.

[0017] On the other side of housing 1, see Figure 3 and Figure 4 The main drive shaft A2 is equipped with two drive sprockets 13 and 14 of different sizes. The positions of the two drive sprockets 13 and 14 can be interchanged. Specifically, the main drive shaft A2, along with the two drive sprockets 13 and 14, is pulled out of the housing 1, and then the main drive shaft A2 is turned around and placed back on the housing 1. In this way, the positions of the two drive sprockets 13 and 14 are interchanged. A driven sprocket 15 is provided on the driven shaft B5. The driven sprocket 15 is connected to the drive sprocket (13 or 15) closest to the housing 1 via a drive chain 3. The driven shaft C8 is connected to the main drive shaft of the seeder.

[0018] The replacement of driven sprockets B and C in this invention is achieved by providing pin holes at the corresponding shaft ends, with pins inserted into the pin holes. This allows for convenient and quick replacement of the corresponding driven sprockets through the insertion of the pins. Different transmission speed ratios are thus achieved to adjust the rotational speed of the seeder's main drive shaft, thereby controlling the sowing spacing of crop seeds.

[0019] This utility model also has a plant spacing reference table for the seeder (not shown in the figure) on the shell 1. In actual operation, according to the requirements of sowing different crops, the sprockets on the main drive shaft A, driven shaft B, and driven shaft C are changed by using the plant spacing reference table to achieve different transmission speed ratios.

Claims

1. A multi-gear adjustment mechanism for a seeder gearbox, comprising a housing, characterized in that... A main drive shaft A is provided at one end of the housing, passing through the housing. A driven shaft B is provided at the upper part of the other end of the housing, passing through the housing. A driven shaft C is provided below the driven shaft B, passing through the housing. On one side of the housing, a replaceable driven sprocket B is provided on the driven shaft B, and a replaceable driven sprocket C is provided on the driven shaft C. The driven sprocket B and the driven sprocket C are connected by a driven chain. A driven chain tensioning mechanism is provided on the housing on this side. On the other side of the housing, two drive sprockets of different sizes and positions are provided on the main drive shaft A, and a driven sprocket is provided on the driven shaft B. The driven sprockets are connected to the drive sprockets near the housing by a drive chain.

2. The multi-speed adjustment mechanism of the seeder gearbox according to claim 1, characterized in that: The driven chain tensioning mechanism consists of an L-shaped bracket on the housing, with the bracket's rotation shaft mounted on the housing. Bracket sprockets are located at both ends of the bracket, and the driven chain passes over the two bracket sprockets.

3. The multi-speed adjustment mechanism of the seeder gearbox according to claim 1, characterized in that: A plant spacing reference table for the seeder is also provided on the shell.

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