An external hanging type agricultural machine hydraulic power device for air curtain spray rod

Abstract

The utility model relates to agricultural planting mechanical technology field, concretely is a kind of outer hanging type agricultural machinery hydraulic power device for wind curtain spray rod, it includes: installation hanger, installation hanger middle part is equipped with hydraulic power device and liquid medicine supply device by installation support;Liquid medicine supply device includes medicine pump and reagent bucket, and medicine pump is driven by the output shaft of tractor tail portion;Hydraulic power device includes the speed-increasing gearbox and hydraulic pump connected in series.The utility model discloses, by the speed-increasing gearbox and hydraulic pump connected in series driven by medicine pump pump shaft, constructs a set of independent outer hanging type hydraulic power device.The device simplifies power transmission mode, and the hydraulic pump is used as the hydraulic system function of self-contained, saves the connection of hydraulic pipeline when hanging, guarantees the sealing property of pipeline, improves the hanging speed, and guarantees the versatility of equipment between different tractors;Meanwhile, independent hydraulic system leaves margin for the improvement and expansion of wind curtain spray rod, facilitates subsequent upgrade.

Description

Technical Field

[0001] This utility model relates to the field of agricultural plant protection machinery technology, specifically to an external hydraulic power device for an air curtain spray boom. Background Technology

[0002] Boom sprayers are highly efficient equipment for large-scale pest, disease, and weed control in modern agriculture. Conventional boom sprayers are significantly affected by natural wind, resulting in pesticide drift loss. Adding an air curtain component to the traditional boom sprayer effectively reduces droplet drift loss and improves penetration into the crop canopy.

[0003] Currently, there are two main power sources for air curtain systems: One commonly used approach relies on the tractor's built-in hydraulic system. This approach is limited by the tractor's hydraulic system, making it unusable for some upgrades to the spray boom and air curtain components. Furthermore, it requires connecting multiple high-pressure hydraulic lines before operation, a time-consuming process with a risk of leakage.

[0004] Another option is to use a dedicated self-propelled chassis. This solution integrates the power system, typically a single-cylinder diesel engine, onto the sprayer to power the hydraulic system. It offers ample power and easy upgrades, but the manufacturing cost is higher, and the machine is heavier, resulting in greater vibration during operation. The frame and spray boom will shake noticeably, affecting spray uniformity and machine lifespan. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides an external hydraulic power device for agricultural machinery used in air curtain spray booms.

[0006] The technical solution of this utility model is: An external hydraulic power unit for an air curtain spray boom, comprising: The mounting bracket is used to connect the air curtain spray bar and the tractor. The middle part of the mounting bracket is equipped with a hydraulic power device and a liquid supply device via a mounting bracket. The liquid medicine supply device includes a medicine pump and a medicine tank, and the medicine pump is driven by the output shaft at the rear of the tractor. The hydraulic power unit includes a speed increaser and a hydraulic pump connected in series. The input end of the speed increaser is driven by the pump shaft of the medicine pump, and the hydraulic pump is used to provide power to the hydraulic system of the air curtain spray bar.

[0007] Preferably, the medicine pump further includes a pump body, the pump shaft passes through the pump body, and one end of the pump shaft is connected to the output shaft at the rear of the tractor via a universal joint.

[0008] Preferably, the outlet of the pump body is connected to a three-way valve, and the two ports of the three-way valve are respectively connected to the air curtain spray bar and the medicine tank to control the flow direction of the medicine.

[0009] Preferably, the mounting bracket includes a base plate, on which a fixed bracket is provided. The drug pump and the speed increaser are fixedly mounted on the fixed bracket, and the tail end of the pump shaft is inserted into the speed increaser.

[0010] Preferably, the hydraulic pump is fixedly installed on one side of the speed increaser output end, and the input shaft of the hydraulic pump is connected to the output shaft of the speed increaser.

[0011] Preferably, the hydraulic system includes a hydraulic oil tank and a multi-way directional valve. The hydraulic oil tank is used to store hydraulic oil and is connected to the hydraulic pump inlet and the multi-way directional valve return port through pipelines. The multi-way directional valve is used to control the hydraulic equipment.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention relates to a utility model that constructs an independent external hydraulic power unit by connecting a speed increaser and a hydraulic pump in series, driven by a medicine pump shaft. This device simplifies power transmission, utilizing its own hydraulic pump as the core of the hydraulic system, eliminating the need for hydraulic pipeline connections during attachment, ensuring pipeline sealing, improving attachment speed, and guaranteeing the equipment's versatility across different tractors. Simultaneously, the independent hydraulic system provides leeway for the improvement and expansion of the air curtain spray boom, facilitating future upgrades. Attached Figure Description

[0013] Figure 1 This is a first schematic diagram of the overall structure of this utility model; Figure 2 This is a second schematic diagram of the overall structure of this utility model; Figure 3 This is a first schematic diagram of the power device structure in this utility model; Figure 4 This is a second schematic diagram of the power device structure in this utility model; Figure 5 This is an exploded view of the power unit structure in this utility model.

[0014] The meanings of the labels in the diagram are as follows: 1. Mounting bracket; 2. Base plate; 3. Medicine barrel bracket; 4. Medicine barrel; 5. Fixing bracket; 6. Pharmaceutical pump; 601. Pump body; 602. Pump shaft; 603. Three-way valve; 7. Universal joint shaft; 8. Speed ​​increaser; 9. Hydraulic pump; 10. Hydraulic oil tank; 11. Multi-way directional valve; 12. Lifting device; 13. Lifting frame; 14. Spray bar assembly; 15. Air curtain assembly. Detailed Implementation

[0015] 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.

[0016] Example 1: Please see Figure 1-5 The present invention will describe the above technical solution in detail through the following embodiments: An external hydraulic power unit for an air curtain spray boom, comprising: Mounting bracket 1 is used to connect the air curtain spray bar and the tractor. The middle of the mounting bracket 1 is equipped with a hydraulic power unit and a liquid supply device via a mounting bracket.

[0017] The air curtain spray bar is installed on the rear side of the mounting bracket 1 via the lifting device 12.

[0018] The lifting device 12 can be a hydraulic cylinder, powered by a hydraulic power unit.

[0019] The air curtain spray boom includes a spray boom assembly 14 and an air curtain assembly 15. The spray boom assembly 14 is used for spraying pesticides, and the air curtain assembly 15 is used to reduce droplet drift loss and improve penetration into the crop canopy.

[0020] The liquid medicine supply device includes a medicine pump 6 and a medicine tank 4. The medicine pump 6 is driven by the output shaft at the rear of the tractor.

[0021] The medicine tank 4 is mounted in the middle of the mounting bracket 1 via the medicine tank bracket 3, and the medicine pump 6 and hydraulic power unit are located below the medicine tank 4.

[0022] The medicine pump 6 is a through-shaft pump, preferably a diaphragm pump, with a rated flow range of 150-250 liters / minute.

[0023] The hydraulic power unit includes a speed increaser 8 and a hydraulic pump 9 connected in series. The input end of the speed increaser 8 is driven by the pump shaft 602 of the medicine pump 6, and the hydraulic pump 9 is used to provide power to the hydraulic system of the air curtain spray bar.

[0024] The medicine pump 6 also includes a pump body 601, a pump shaft 602 that passes through the pump body 601, and one end of the pump shaft 602 is connected to the output shaft at the rear of the tractor via a universal joint shaft 7.

[0025] The pump shaft 602 has splines at both ends, with a preferred number of teeth of 6, a module of 3, and a pressure angle of 30°.

[0026] The transmission ratio of speed increaser 8 is calculated based on the displacement of hydraulic pump 9 and the maximum flow rate required by the hydraulic system.

[0027] If the target rated flow rate is 50 liters / minute, and the common speed range of the rear output shaft of a tractor is 450-540 rpm, taking the lowest value of 450 rpm, if the displacement of the hydraulic pump 9 is 30cc / rev, then the transmission ratio of the speed increaser 8 should be 1:3.8.

[0028] The mounting bracket includes a base plate 2, on which a fixed bracket 5 is provided. The medicine pump 6 and the speed increaser 8 are fixedly installed on the fixed bracket 5, and the tail end of the pump shaft 602 is inserted into the speed increaser 8.

[0029] The input end of the speed increaser 8 uses an internal spline, which is matched with the pump shaft 602.

[0030] The fixed bracket 5 is used to support the weight of the speed increaser 8 and the hydraulic pump 9, as well as the vibration during operation, to avoid affecting the operation of the medicine pump 6.

[0031] The hydraulic pump 9 is fixedly installed on one side of the output end of the speed increaser 8, and the input shaft of the hydraulic pump 9 is connected to the output shaft of the speed increaser 8.

[0032] The input shaft of the hydraulic pump 9 is connected to the output shaft of the speed increaser 8 via a single key.

[0033] The medicine pump 6, the speed increaser 8, and the hydraulic pump 9 are connected in series.

[0034] The outlet of the pump body 601 is connected to a three-way valve 603. The two ports of the three-way valve 603 are connected to the air curtain spray bar and the chemical tank 4, respectively, to control the flow direction of the chemical solution.

[0035] Because the medicine pump 6, the speed increaser 8, and the hydraulic pump 9 are connected in series, the three-way valve 603 can change the direction of the medicine flow, allowing the medicine to return to the medicine tank 4, thus enabling the hydraulic system to operate independently. This prevents the spray boom assembly 14 from spraying medicine when the hydraulic system is operating.

[0036] The hydraulic system includes a hydraulic oil tank 10 and a multi-way directional valve 11. The hydraulic oil tank 10 is used to store hydraulic oil and is connected to the oil inlet of the hydraulic pump 9 and the return port of the multi-way directional valve 11 through a pipeline. The multi-way directional valve 11 is used to control the hydraulic equipment.

[0037] The oil outlet of the hydraulic pump 9 is connected to the oil inlet of the multi-way directional valve 11 via a pipeline.

[0038] Hydraulic equipment includes, but is not limited to, the hydraulic motor of the lifting device 12, the fan of the air curtain assembly 15, and the hydraulic cylinder for retracting and extending the spray boom assembly 14.

[0039] Working principle: Use mounting bracket 1 to attach the equipment to the rear of the tractor.

[0040] The universal joint shaft 7 is used to connect the tractor's tail output shaft and the medicine pump 6.

[0041] Before adjusting the height of the air curtain spray bar, unfolding the spray bar assembly 14, and starting the air curtain assembly 15, the three-way valve 603 needs to be adjusted to the reflux position, which connects the outlet of the medicine pump 6 to the medicine tank 4.

[0042] Start the tractor and use the output shaft at the rear of the tractor to drive the universal joint shaft 7 to rotate, thereby driving the pump shaft 602 to rotate. The rotation of the pump shaft 602 will drive the medicine pump 6 to work and pump out the medicine liquid in the medicine tank 4. However, when the medicine liquid is discharged from the outlet of the medicine pump 6, it will return to the medicine tank 4 through the three-way valve 603.

[0043] Pump shaft 602 transmits the tractor's power to speed increaser 8. Speed ​​increaser 8 increases the rotational speed, which in turn drives hydraulic pump 9 to work.

[0044] When the hydraulic pump 9 is working, it can pump out the hydraulic oil in the hydraulic oil tank 10 and send it into the multi-way directional valve 11.

[0045] The multi-way directional valve 11 can be used to control the operation of various hydraulic devices.

[0046] When the spray boom assembly 14 needs to work, switch the three-way valve 603 to the spray position, which means connecting the outlet of the medicine pump 6 to the spray boom assembly 14.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An externally mounted hydraulic power unit for an air curtain spray boom, characterized in that, include: Mounting bracket (1), which is used to connect the air curtain spray bar and the tractor, and the mounting bracket (1) is equipped with a hydraulic power device and a liquid supply device in the middle through the mounting bracket; The liquid medicine supply device includes a medicine pump (6) and a medicine tank (4), wherein the medicine pump (6) is driven by the output shaft at the rear of the tractor; The hydraulic power unit includes a speed increaser (8) and a hydraulic pump (9) connected in series. The input end of the speed increaser (8) is driven by the pump shaft (602) of the medicine pump (6). The hydraulic pump (9) is used to provide power to the hydraulic system of the air curtain spray bar.

2. The external hydraulic power unit for an air curtain spray boom as described in claim 1, characterized in that: The medicine pump (6) also includes a pump body (601), and the pump shaft (602) passes through the pump body (601). One end of the pump shaft (602) is connected to the output shaft at the rear of the tractor through a universal joint shaft (7).

3. The external hydraulic power unit for an air curtain spray boom as described in claim 2, characterized in that: The outlet of the pump body (601) is connected to a three-way valve (603), and the two ports of the three-way valve (603) are respectively connected to the air curtain spray bar and the medicine tank (4) to control the flow direction of the medicine.

4. The external hydraulic power unit for an air curtain spray boom as described in claim 1, characterized in that: The mounting bracket includes a base plate (2), on which a fixed bracket (5) is provided. The medicine pump (6) and the speed increaser (8) are fixedly installed on the fixed bracket (5), and the tail end of the pump shaft (602) is inserted into the speed increaser (8).

5. The external hydraulic power unit for an air curtain spray boom as described in claim 4, characterized in that: The hydraulic pump (9) is fixedly installed on one side of the output end of the speed increaser (8), and the input shaft of the hydraulic pump (9) is connected to the output shaft of the speed increaser (8).

6. The external hydraulic power unit for an air curtain spray boom as described in claim 1, characterized in that: The hydraulic system includes a hydraulic oil tank (10) and a multi-way directional valve (11). The hydraulic oil tank (10) is used to store hydraulic oil and is connected to the oil inlet of the hydraulic pump (9) and the return port of the multi-way directional valve (11) through a pipeline. The multi-way directional valve (11) is used to control the hydraulic equipment.

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