Negative pressure maintaining transmission structure of air suction type seed metering device

Abstract

The utility model discloses a kind of negative pressure keeping transmission structures of wind suction type seed metering device, comprising: negative pressure fan, power shaft, transmission shaft, belt pulley, transmission belt, traction equipment output shaft, universal coupling, clutch mechanism, the negative pressure fan is the negative pressure providing mechanism of air suction device, the power shaft is the rotating shaft of negative pressure fan, and two belt driven wheels are provided in power shaft outer end, the transmission shaft is set on main body frame by bearing seat, the belt pulley is fixedly connected on transmission shaft, and belt pulley is connected with belt driven wheel on power shaft by transmission belt, the traction equipment output shaft is connected with transmission shaft by universal coupling, the clutch mechanism is set on transmission shaft, the rotational speed monitoring mechanism is provided on the traction equipment output shaft, the rotational speed monitoring mechanism and clutch mechanism are electrically connected with controller respectively by signal line. The utility model has the advantages of simple structure, safe and effective, good use effect etc.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery auxiliary equipment technology, specifically a negative pressure maintaining transmission structure for a wind-suction seed metering device. Background Technology

[0002] Air suction seeders use an air suction device to generate negative pressure, drawing seeds from the seed box to the seed metering tray and separating individual seeds using the pressure difference. However, in actual use, the air suction device is usually a negative pressure fan, which is often powered by the traction equipment and transmitted through a universal coupling. This means that when the traction equipment is turning or traveling at low speeds, the fan cannot provide sufficient negative pressure due to insufficient rotation speed, thus preventing the air suction seeder from working properly and effectively carrying out seeding operations.

[0003] The existing technical solution is to introduce additional power to drive the negative pressure fan of the suction device when the traction equipment speed is insufficient, thereby generating sufficient negative pressure to keep the air suction seeder working normally. In order to ensure that the negative pressure fan can be driven normally, the power of the traction equipment needs to be cut off or introduced at the appropriate time. Summary of the Invention

[0004] The purpose of this invention is to provide a negative pressure maintaining transmission structure for a wind-suction seed metering device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a negative pressure maintaining transmission structure for a wind-suction seed metering device, comprising: a negative pressure fan, a power shaft, a transmission shaft, a pulley, a transmission belt, a traction device output shaft, a universal coupling, and a clutch mechanism. The negative pressure fan is the negative pressure providing mechanism for the suction device. The power shaft is the rotating shaft of the negative pressure fan, and two belt-driven pulleys are provided at the outer end of the power shaft. The transmission shaft is mounted on the main frame through a bearing seat. The pulley is fixed to the transmission shaft, and the pulley is connected to one belt-driven pulley on the power shaft through the transmission belt. The traction device output shaft is connected to the transmission shaft through a universal coupling, and the clutch mechanism is mounted on the transmission shaft.

[0006] Furthermore, a speed monitoring mechanism is provided on the output shaft of the traction device.

[0007] Furthermore, the speed monitoring mechanism and the clutch mechanism are electrically connected to the controller via signal lines.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows: The negative pressure maintaining transmission structure of the wind-suction seed metering device of this utility model is improved on the basis of the existing transmission mechanism. A clutch mechanism is set on the transmission shaft of the pulley, so as to cut off or introduce the power of the traction equipment at the appropriate time. A speed monitoring mechanism is set on the output shaft of the traction equipment. In specific use, when the speed of the output shaft of the traction equipment is lower than the set minimum value, the speed monitoring mechanism generates a signal and sends it to the controller. The controller operates the clutch mechanism to switch to the disengaged state and starts the backup power to drive the negative pressure fan to work normally. When the speed of the output shaft of the traction equipment is higher than the set minimum value, the speed monitoring mechanism generates a signal and sends it to the controller. The controller operates the clutch mechanism to switch to the engaged state, removes the backup power, and uses the output shaft of the traction equipment to drive the negative pressure fan to work normally.

[0009] This utility model has the advantages of simple structure, safety and effectiveness, and good performance. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model; In the diagram: 1-Negative pressure fan; 2-Power shaft; 3-Drive shaft; 4-Pulley; 5-Drive belt; 6-Traction equipment output shaft; 7-Universal coupling; 8-Clutch mechanism; 9-Speed ​​monitoring mechanism. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0012] Please see Figure 1 This utility model provides a negative pressure maintaining transmission structure for a wind-suction seed metering device, including: a negative pressure fan 1, a power shaft 2, a transmission shaft 3, a pulley 4, a transmission belt 5, a traction device output shaft 6, a universal coupling 7, and a clutch mechanism 8. The negative pressure fan 1 is the negative pressure providing mechanism for the suction device. The power shaft 2 is the rotating shaft of the negative pressure fan 1, and two belt driven pulleys are provided at the outer end of the power shaft 2. The transmission shaft 3 is mounted on the main frame through a bearing seat. The pulley 4 is fixed to the transmission shaft 3, and the pulley 4 is connected to one of the belt driven pulleys on the power shaft 2 through the transmission belt 5. The traction device output shaft 6 is connected to the transmission shaft 3 through the universal coupling 7. The clutch mechanism 8 is provided on the transmission shaft 3.

[0013] Furthermore, a speed monitoring mechanism 9 is provided on the output shaft 6 of the traction device.

[0014] Furthermore, the speed monitoring mechanism 9 and the clutch mechanism 8 are electrically connected to the controller via signal lines.

[0015] The working principle of this utility model is as follows: The negative pressure maintaining transmission structure of the wind suction seed metering device of this utility model is improved on the basis of the existing transmission mechanism. A clutch mechanism 8 is set on the transmission shaft 3 of the pulley 4, so as to cut off or introduce the power of the traction device at the appropriate time. A speed monitoring mechanism 9 is set on the output shaft 6 of the traction device. In specific use, when the speed of the output shaft 6 of the traction device is lower than the set minimum value, the speed monitoring mechanism 9 generates a signal and sends it to the controller. The controller operates the clutch mechanism 8 to switch to the disengaged state and starts the backup power to drive the negative pressure fan 1 to work normally. When the speed of the output shaft 6 of the traction device is higher than the set minimum value, the speed monitoring mechanism 9 generates a signal and sends it to the controller. The controller operates the clutch mechanism 8 to switch to the engaged state, removes the backup power, and uses the output shaft 6 of the traction device to drive the negative pressure fan 1 to work normally.

[0016] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A negative pressure maintaining transmission structure for a wind-suction seed metering device, characterized in that, include: The components include a negative pressure fan (1), a power shaft (2), a transmission shaft (3), a pulley (4), a transmission belt (5), a traction equipment output shaft (6), a universal coupling (7), and a clutch mechanism (8). The negative pressure fan (1) is the negative pressure supply mechanism for the suction device. The power shaft (2) is the rotating shaft of the negative pressure fan (1), and two belt driven pulleys are provided at the outer end of the power shaft (2). The transmission shaft (3) is mounted on the main frame through a bearing seat. The pulley (4) is fixed to the transmission shaft (3), and the pulley (4) is connected to a belt driven pulley on the power shaft (2) through the transmission belt (5). The traction equipment output shaft (6) is connected to the transmission shaft (3) through a universal coupling (7). The clutch mechanism (8) is mounted on the transmission shaft (3).

2. The negative pressure maintaining transmission structure of the air suction seed metering device according to claim 1, characterized in that, The output shaft (6) of the traction equipment is equipped with a speed monitoring mechanism (9).

3. The negative pressure maintaining transmission structure of the air suction seed metering device according to claim 2, characterized in that, The speed monitoring mechanism (9) and the clutch mechanism (8) are electrically connected to the controller via signal lines.

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