JPH0450936Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a speed sprayer.

(Prior Art) Conventionally, in a speed sprayer, a piston pump that uses a ceramic-coated piston rod, for example, is used as a pump for spraying the chemical liquid in the chemical liquid tank, and a piston pump that uses a piston rod coated with ceramic is used. The chemical solution was sprayed from a nozzle. The chemical liquid ejected from the spray nozzle is configured to be blown away by wind pressure generated by rotation of rotor blades disposed within the wind barrel. Furthermore, water is supplied to the chemical tank using a water supply pump.

Driving force is transmitted to the piston pump and the water supply pump from a common driving source for driving the speed sprayer, and an electromagnetic clutch is provided in the middle of each drive system. Three switches, a switch for connecting/disconnecting each of these electromagnetic clutches and a switch for driving the rotor blades, are provided individually.

(Problem that the invention aims to solve) When spraying a chemical solution over a large area, such as an orchard, with a speed sprayer, the chemical solution in the chemical solution tank is not enough, and the chemical solution must be replenished midway through. This is necessary.

When the chemical solution in the chemical solution tank runs out halfway, it moves to replenish the chemical solution. At that time, both the rotor blade drive switch and the piston pump switch are turned off, and the robot moves to a predetermined location and replenishes the chemical solution. However, since rotor blades generate loud noises when driven, people do not forget to turn off the drive switch for the rotor blades, but they often forget to turn off the switch on the atomizing piston pump, which does not generate much noise.

When the piston pump for spraying is still running and the water supply pump is driven to fill the tank with water to make a chemical solution for spraying, the water is sucked up by the piston pump that is being driven, and until then it is idle. The piston rod, which had been heated to a high temperature during the process, was rapidly cooled down, and this temperature change caused cracks to form in the ceramic coating on the surface of the piston rod. Furthermore, not only piston pumps but also other types of spray pumps may be adversely affected by temperature changes.

Therefore, the present invention was devised to solve the above problems, and its purpose is to provide a water supply pump for supplying water to a chemical tank and a sprayer for supplying a chemical liquid to a nozzle for spraying chemical liquid. To provide a speed sprayer which cannot be driven at the same time as the driving pump.

(Means for Solving the Problems) In order to solve the above problems, the present invention includes the following configuration.

That is, in a speed sprayer that can transmit driving force from a drive source to a water supply pump for supplying water to a chemical solution tank and a spray pump for spraying a chemical solution from a spray nozzle, the drive source An electromagnetic clutch is provided in the middle of the transmission system for the driving force from the water supply pump to the spray pump, and the electromagnetic clutch is configured to connect the driving force intermittently to the pump. It is characterized by the provision of a changeover switch connected to transmit driving force.

(effect) Next, the operation of the present invention will be described.

Even if the spray pump is running when there is no chemical solution in the chemical solution tank, the spray pump will always stop when the water supply pump is activated by the changeover switch to supply water to the chemical solution tank. The spray pump can be cooled while filling the tank.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail based on the accompanying drawings.

FIG. 1 is an explanatory diagram showing the drive mechanism of the speed sprayer.

10 is an engine as a driving source. Drive power from the engine 10 is coupled via a main clutch 12 to an intermediate transmission 14. Then, in the intermediate transmission 14, the driving force is 4
It is branched into. One is connected to a differential gear 20 of a rear wheel 22 via a clutch 16 and a driving transmission 18. Moreover, one is connected to the fan 24 of the blower. Furthermore, the two drive systems are connected via electromagnetic clutches 27 and 29 to an atomizing piston pump 26 and a water supply pump 28, respectively.

FIG. 2 is an explanatory view of the rear part of the speed sprayer. A cylindrical wind barrel 32 that opens in the front-rear direction is provided at the rearmost portion of the speed sprayer. A chemical liquid tank 34 is arranged at a position slightly apart from the wind cylinder 32, and a discharge port 36 is formed between the wind cylinder 32 and the chemical liquid tank 34.

A rotor blade 38 and a stationary blade 40 are arranged in the wind body 32 from the rear. The stationary blade 40 is fixed in front of the wind body 32, and the moving blade 38 is rotatably provided on the axis of the stationary blade 40.

A plurality of nozzles 42 are arranged around the stationary blade 40.

The water supply pump 28 is for supplying water to the chemical tank 34.

The piston pump 26 is for ejecting the chemical liquid in the chemical liquid tank 14 from the nozzles 42 . The piston pump 26 is connected to the chemical tank 34 and each nozzle via a conduit 25.
In the piston pump 26, valves 26b, 26b are opened and closed by the movement of the piston rod 26a.
Supply chemical solution. The surface of the cylinder rod 26a of the piston pump 26 is coated with ceramic.

FIGS. 3 and 4 are explanatory diagrams showing the connection state of the electromagnetic switch that cuts off and on the driving force to the water supply pump 28 and the piston pump 26. FIG.

First, the example shown in FIG. 3 will be explained.

A snap switch 50 serving as a changeover switch is provided with three terminals 50a, 50b, and 50c. An electromagnetic clutch 2 for connecting and disconnecting the water supply pump 28 is connected to each terminal 50a, 50b, and 50c.
9. An electromagnetic clutch 27 for switching on and off the piston pump 26 and a power source 52 are connected in parallel. This snap switch 50 is a three-position switch. Further, lamps 29a and 27a are provided in parallel with the electromagnetic clutches 29 and 27, so that it can be confirmed which electromagnetic clutch is energized or is in an off state.

For this reason, the operating rod 51 of the snap switch 50
When it is tilted in the direction of arrow a, the electromagnetic clutch 29 is connected and only the water supply pump 28 is driven. Also, when the operating rod 51 is tilted in the direction of arrow b, the electromagnetic clutch 27
is connected and only the piston pump 26 is driven.
Furthermore, when the operating rod 51 of the snap switch 50 is set to neutral, the water supply pump 24 and the piston pump 2
It does not drive together with 6.

This embodiment is configured as described above.

Therefore, if the chemical solution in the chemical solution tank 34 runs out during the chemical spraying process using the speed sprayer, the drive switch for the rotor blades 38 is turned off. There is no problem when the drive switch of the piston pump 26 is turned off, but if the drive switch of the piston pump 26 is forgotten to be turned off, the piston rod 26a of the piston pump 26 is heated.

However, when supplying water to the chemical tank 34, the operating rod 51 of the snap switch 50 must be tilted in the direction of arrow a. Therefore, even if the piston pump 26 continues to drive without the operator noticing, the piston pump 26 always stops driving when the water supply pump 28 is driven. Therefore, when the water supply pump 28 is driven, the piston rod 26a of the piston pump 26
is cooled, and the piston pump 26 is not exposed to the chemical solution and cooled down rapidly.

Therefore, even if the piston rod 26a of the piston pump 26 is coated with ceramic, it will not break.

Next, the example shown in FIG. 4 will be explained.

In this embodiment, two snap switches 60 and 62 are combined as a changeover switch.

Snap switch 60 is a drive switch for the water supply pump. The water supply pump 28 is connected to the terminals 60a, 60b, 60c of the snap switch 60.
An electromagnetic clutch 29, a power source 64, and the other snap switch 62 are connected in parallel.

Snap switch 62 is a drive switch for the piston pump. This snap switch 62
has two terminals 62a and 62b, and one terminal 62a is connected to the snap switch 6 as described above.
0 terminal 60c, and the other terminal 60
b is connected to an electromagnetic clutch 27 for the drive switch of the piston pump 26. Further, lamps 29a and 27a are connected to the electromagnetic clutches 29 and 27 in parallel.
, so you can check which one has the switch on.

The snap switches 60 and 62 each have two positions.

The operation of this embodiment will be explained.

When the operating rod 61 of the snap switch 60 is in position a, the electromagnetic clutch 29 is connected and the water supply pump 28 is driven. At this time, even if the operating rod 63 of the other snap switch 62 falls to the a position or the b position, the piston pump 26
is not driven. That is, when the water supply pump 28 is being driven, the piston pump 26 is not driven.

When the operating rod 61 of the snap switch 60 is in position b, the electromagnetic clutch 29 is disengaged and the water pump 28 is not driven. At this time, when the operating rod 63 of the snap switch 62 is moved to position a, the electromagnetic clutch 27 is connected and the piston pump 26 is driven. On the other hand, when the operating rod 63 is tilted to position b, the electromagnetic clutch 27 is not energized and no driving force is transmitted to the piston pump 26.

Therefore, even if the piston pump 26 continues to drive without the operator noticing, the water supply pump 28
When the piston pump 26 is driven, the driving of the piston pump 26 is always stopped. Therefore, when the water supply pump 28 is driven, the piston rod 26a of the piston pump 26 is cooled, and the piston pump 26 is not exposed to the chemical solution and cooled down rapidly.

In the embodiment shown in FIG. 4, in consideration of workability, it is preferable to provide a snap switch 60 for the water supply pump near the water supply pump 28 and a snap switch 62 for the piston pump at the driver's seat. That is, when the chemical liquid in the chemical liquid tank 34 runs out and the operator moves to supply the chemical liquid again, it is desirable that the operation can be performed while sitting in the driver's seat. On the other hand, when supplying water to the chemical liquid tank 34, it is necessary to put one end of the hose connected to the water supply pump 28 into the chemical liquid tank 34 and the other end into a storage tank where water is stored. is necessary. In this case, since the driver is away from the driver's seat, the workability can be improved by providing it near the water supply pump 28.

That is, in the embodiment shown in FIGS. 3 and 4, the water supply pump 28 and the piston pump 26 are configured not to be driven at the same time.

Although the preferred embodiments of the present invention have been described above, it goes without saying that the present invention is not limited to the embodiments described above.
For example, the changeover switch is not limited to a snap switch, but may be modified in many ways without departing from the spirit of the invention, such as by using a slide switch that performs the same function.

(Effects of the invention) As described above about the invention, the water supply pump and the spray pump of the speed sprayer are driven selectively and are not driven at the same time, so there is no need to accidentally turn off the drive switch of the spray pump. Even if the temperature is high, the spray pump always stops when water is supplied, and the spray pump is cooled down during water supply. As a result, the spray pump is not cooled down rapidly, which is a significant advantage.

In particular, even if a piston pump is used as the atomizing pump and the cylinder rod is coated with ceramic, the ceramic coating will not crack (heat shock).

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the drive mechanism of the speed sprayer, Fig. 2 is an explanatory diagram showing the rear part of the speed sprayer, and Figs. 3 and 4 are explanatory diagrams showing the connection state of the water supply pump, piston pump, and power supply. be. 10... Engine, 18... Transmission, 26... Piston pump, 27, 29... Electromagnetic clutch, 28... Water supply pump, 32... Wind barrel, 34... Chemical tank, 38... Moving blade, 40...
...static wing, 50, 60, 62...snap switch.

Claims (1)

[Claims for Utility Model Registration] The driving force from the drive source can be transmitted to a water supply pump for supplying water to a chemical liquid tank and a spray pump for spraying a chemical liquid from a spray nozzle. In a speed sprayer, an electromagnetic clutch is provided in the middle of the transmission system for driving force from the drive source to the water supply pump and the spray pump, and the electromagnetic clutches that connect and connect the driving force are installed, and only one of the two electromagnetic clutches is always selected. A speed sprayer characterized by being equipped with a changeover switch that connects a corresponding pump to transmit driving force.