A longitudinal seedling delivery device for a double-ratchet rice seedling transplanter

Abstract

This invention discloses a longitudinal seedling delivery device for a double-ratchet rice seedling transplanter. This device, belonging to agricultural machinery, includes a cam mechanism and a ratchet mechanism. The cam is fixed to the drive shaft, and a drive disc with a transmission pin is mounted on the driven shaft. A drive groove is fixed to the driven shaft, and two ratchet teeth in opposite directions are arranged within the drive groove. These two ratchet teeth engage with a forward ratchet ring and a reverse ratchet ring installed in a housing via springs. The transmission pin slides within the groove on the forward ratchet tooth, while the reverse ratchet remains locked in one direction. The cam actuates the drive disc, and the transmission pin, ratchet teeth, and drive groove cooperate to rotate the driven shaft, completing the longitudinal seedling delivery process. Because this invention uses two ratchet mechanisms in opposite directions, it has an intermittent locking function, effectively improving the accuracy of seedling delivery. This invention has a simple structure, reliable operation, is easy to manufacture, and has a low cost, solving the problem of poor longitudinal seedling delivery accuracy in the current field of rice seedling transplanting.

Description

Technical Field

[0001] This invention belongs to the field of agricultural machinery technology, specifically relating to a drive device for rice seedling transplanting machinery that enables longitudinal and orderly seedling delivery. Background Technology

[0002] The longitudinal seedling feeding device is one of the key components of rice seedling transplanting machinery, and its performance directly affects and determines the quality and efficiency of seedling removal. Currently, the longitudinal seedling feeding device on rice seedling transplanting machinery mainly consists of an external ratchet mechanism. During seedling feeding, the locking mechanism opens, driving the ratchet to rotate through a certain angle; when seedling feeding stops, the locking mechanism closes, stopping the ratchet's rotation. This type of mechanism generally suffers from inaccurate positioning, low timing precision, and poor cornering reliability, failing to achieve precise positioning and guaranteeing the accuracy of seedling feeding. Therefore, the existing longitudinal seedling feeding device cannot meet and adapt to the increasingly precise operation requirements of rice seedling transplanting machinery. Summary of the Invention

[0003] The purpose of this invention is to address the problems existing in the prior art and, in combination with the actual needs of agricultural production operations, to provide a longitudinal seedling delivery device for a double ratchet rice seedling transplanter. This device utilizes two pairs of oppositely installed internal ratchet mechanisms to achieve a bidirectional locking function and the buffering effect of springs, thereby improving the reliability of the turning angle and the accuracy of the delivery time, reducing inertial force, and achieving the goal of precise seedling delivery.

[0004] To achieve the above objectives, this utility model provides the following technical solution: The longitudinal seedling delivery device of the double ratchet rice seedling transplanter includes a cam fixed on the drive shaft, a transmission pin fixed on a drive disc with a cylindrical protrusion mounted on the driven shaft, a drive groove fixed on the driven shaft, and a forward ratchet and a reverse ratchet installed in the drive groove. The forward ratchet and the reverse ratchet engage with a forward ratchet ring and a reverse ratchet ring installed in the housing through spring one and spring two, respectively. The transmission pin slides in the groove on the forward ratchet, and the housing is mounted on the driven shaft.

[0005] Through the above technical solutions, the technical effects of this utility model are as follows: 1. This utility model provides a longitudinal seedling feeding mechanism, which can reliably transmit and accurately position seedlings in the longitudinal direction; 2. This utility model proposes a structure consisting of two pairs of internal ratchet wheels installed in opposite directions, which solves the problem of poor reliability of ratchet wheels in traditional longitudinal seedling feeding mechanisms; when the mechanism is running, the forward ratchet wheel is the working stroke wheel, and the reverse ratchet wheel is the locking wheel, which can not only meet the intermittent movement at a specified angle, but also accurately lock when the movement stops, resulting in high operational reliability. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the structure of this utility model;

[0007] Figure 2 A schematic diagram of the internal structure of the longitudinal seedling delivery device of a double-ratchet rice seedling transplanter;

[0008] Figure 3 A schematic diagram of the internal installation of the longitudinal seedling feeding device in a double-ratchet rice seedling transplanter.

[0009] Figure 4 Schematic diagram of the longitudinal seedling delivery device of a double-ratchet rice seedling transplanter;

[0010] Figure 5 This is a schematic diagram showing the installation of the ratchet and drive slot;

[0011] Part number description in the image:

[0012] 1-Drive shaft; 2-Drive disc; 3-Driven shaft; 4-Cylindrical protrusion; 5-Cam; 6-Casing; 7-Drive groove; 8-Transmission pin; 9-Forward ratchet; 10-Reverse ratchet; 11-Forward ratchet ring; 12-Reverse ratchet ring; 13-Spring 1; 14-Spring 2. Detailed Implementation

[0013] A longitudinal seedling delivery device for a double-ratchet rice seedling transplanter is disclosed. This device involves a longitudinal seedling delivery mechanism that transports seedlings a set distance. During operation, the drive shaft 1 drives the cam 5 to rotate clockwise. When the cam 5 contacts the cylindrical protrusion 4 on the drive disc 2, the drive disc 2 rotates through a certain angle. Simultaneously, the transmission pin 8, fixed to the drive disc 2, rotates around the drive disc 2 through a corresponding angle. The transmission pin 8 slides in the groove of the forward ratchet 9, causing the forward ratchet 9 to slide towards the center of rotation, thus separating the meshing forward ratchet 9 from the forward ratchet ring 11. The transmission pin 8 then drives the forward ratchet 9 to slide in the drive groove 7, causing the drive groove 7 to rotate through a corresponding angle. The drive groove 7 is fixed to the driven shaft 3, causing the driven shaft 3 to rotate through a certain angle. The reverse ratchet 10 and the reverse ratchet ring 12 remain in contact, ensuring that the driven shaft 3 can only rotate in one direction. The driven shaft 3 moves the seedling tray one seedling's distance, completing one longitudinal seedling delivery cycle.

[0014] This seedling delivery device adopts a double ratchet mechanism design. When delivering seedlings, it uses two pairs of ratchets installed in opposite directions. The one-way locking action of the ratchets can effectively improve the accuracy of longitudinal seedling delivery.

Claims

1. A longitudinal seedling delivery device for a double ratchet rice seedling transplanter, the device comprising a drive shaft (1), a drive disc (2), a driven shaft (3), a cylindrical protrusion (4), a cam (5), a housing (6), a drive groove (7), a transmission pin (8), a forward ratchet (9), a reverse ratchet (10), a forward ratchet ring (11), a reverse ratchet ring (12), a spring one (13), and a spring two (14), characterized in that: The cam (5) is fixed on the drive shaft (1), the drive disk (2) and the housing (6) are fitted on the driven shaft (3), the drive disk (2) is fixed with a cylindrical protrusion (4) and a transmission pin (8), the transmission pin (8) slides in the groove provided on the forward ratchet (9), the drive groove (7) is fixed on the driven shaft (3), the forward ratchet (9) and the reverse ratchet (10) are connected to the drive groove (7) by spring one (13) and spring two (14) and slide in the drive groove (7), the forward ratchet ring (11) and the reverse ratchet ring (12) are fixed in the housing (6).

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