JPS629983Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention connects the driving shaft of the engine and the rotating shaft of the blower blade of the chemical sprayer in a drive vehicle equipped with a chemical sprayer, especially a speed sprayer. The present invention relates to an operating device for an electromagnetic clutch.

(b) Conventional technology Conventionally, to drive the blower blades of chemical sprayers, especially speed sprayers, a high-horsepower engine that also drives the chemical sprayer is required in order to achieve high-speed rotation, and its clutch mechanism is It was based on a mechanical remote control device that connected a clutch installed at the rear and a clutch operating device located in a separate control section from the clutch.

On the other hand, Utility patent application No. 51-142576 (Utility application No. 50-61311)
``Speed Sprayer'' is a self-propelled chemical spraying vehicle for agricultural use (self-propelled speed sprayer) that uses a single engine to drive, and for power transmission for chemical spraying, the output shaft of the engine is divided into multiple shafts by installing a transfer. At least two output shafts are provided, one of which is connected to the chemical dispersion blower and the pump drive shaft through a disk clutch device, and the other shaft is driven through another disk clutch device. A structure of a power transmission device that is connected to a vehicle transmission and further connected to a wheel drive device is known, and is similarly operated remotely from the driver's seat.

(c) Problems to be solved by the invention Mechanical remote control of the clutch requires a large and complicated transmission mechanism, which has the problem of being prone to failure. In addition, regardless of whether the clutch is operated mechanically or not, if the clutch is engaged and the blower blades are rapidly rotated when the engine is running at high speed to drive a chemical sprayer, the blower blades will be overloaded. Another problem is that the impact force is applied and the mechanism around the rotating shaft is subject to severe wear and tear. If a clutch that can withstand impact force during high-speed rotation is used, it would have the problem of being large and expensive.

(d) Means to solve the problem This idea connects the driving shaft of the engine of the drive vehicle on which the chemical sprayer is mounted and the rotating shaft of the blower vane in a detachable manner using an electromagnetic clutch, and operates the electromagnetic clutch. In the electromagnetic clutch operating device connected to the electromagnetic clutch switch provided in the section by a remote control circuit,
An accelerator lever that rotates around the accelerator shaft increases or decreases the rotation of the engine, and an electromagnetic clutch operating rod that is linked to the rotation of the accelerator lever are attached to the accelerator shaft, so that the engine rotates at a lower speed than during chemical spraying work. An electromagnetic clutch switch for an electromagnetic clutch is installed in a position where the tip of an electromagnetic clutch operating rod linked to the accelerator lever can come into contact with the accelerator lever when the accelerator lever is operated. By providing a clutch operation device, the purpose is to eliminate the wear and tear and failure of the machine, which are the drawbacks of mechanical transmission mechanisms, and to obtain a small and simple device, and to soften the impact force when the blower blade starts. To prevent damage to the rotating shaft and the electromagnetic clutch, the present invention aims to provide a device in which the electromagnetic clutch operates reliably only when the engine rotates at a low speed compared to the rotation during normal spraying work.

(e) Operation When the accelerator lever is rotated from the engine stop position, the electromagnetic clutch operating rod is also rotated at the same time, and the engine is started and accelerated. Therefore, when the engine is at a constant rotational speed in a low speed range, the tip of the electromagnetic clutch operating rod automatically contacts and closes the electromagnetic clutch switch, and the electric circuit is energized to the electromagnetic clutch. As the electric circuit works, the electromagnetic clutch is connected and the rotating shaft of the blower blade begins to rotate. Then, by rotating the accelerator lever as it is and gradually accelerating the engine, the blower blades smoothly reach the rotation required for the prescribed spraying operation without generating any impact force.

(f) Embodiment Next, this invention will be explained based on the drawings of the embodiment.A multi-wheel drive vehicle 1 is equipped with a control section A, a chemical tank section B, an engine section C, and a chemical sprayer D on a truck from the front.
It is constructed by sequentially arranging the following.

The control section A is composed of a pilot seat 1, a travel lever 2, and an accelerator lever 3, and the chemical tank section B is composed of a chemical solution tank 4 and an agitator 5 provided therein. The engine section C is configured with an engine 6 adjacent to the front of a chemical sprayer D, and the chemical sprayer D is composed of a wind barrel 7, a spray nozzle 8, a blower blade 9, and a rectifying plate 10. A driving shaft 11 protruding in front of the engine 6 is connected to an axle 13 via a main transmission shaft 12. Spraying driving shaft 1 protruding from the rear of the engine 6
4 is a pulley 15, a belt 16, an electromagnetic clutch 1
It is connected to the rotating shaft 18 of the blower blade 9 by 7. The rotating shaft 18 has a blower blade 9 fixed to its rear end, and the middle part is rotatably connected to the vehicle frame 2 by means of a housing 19.
It is fixedly supported at 0. The electromagnetic clutch 17 is arranged near the engine section C of the housing 19 as follows. The annular rotor 21 is attached to the housing 19
A concave portion 22 is formed in a circular ring shape on the side surface, and the rotating shaft 18 is fixed to the inner surface of the ring. Clutch stator 29 fits protrusion 24 closely within recess 22 and secures base 25 to the front surface of housing 19. An excitation coil 26 is built into the protrusion 24 of the clutch stator 23. At the front end of the rotating shaft 18,
A clutch pulley 27 is rotatably mounted on the rotating shaft 18, and the rotor 21 of the clutch pulley 27
Double elastic plates 28 and friction plates 29 are attached to the side surfaces,
The electromagnetic clutch 17 is constructed by disposing the surface of the friction plate 29 and the front surface of the rotor 21 so as to be close to each other and facing each other. 30 is a code. The accelerator lever 3 disposed in the control section A is horizontally fixed to the upper end of a vertically installed accelerator shaft 31. An electromagnetic clutch operating rod 32 is fixed to the accelerator shaft 31 below the accelerator lever 3 so as to form a cross shape with the accelerator shaft 31, and a roller 33 is attached to one end of the electromagnetic clutch operating rod 32.
is attached, a wire 34 is attached to the other end, and the wire 34 is connected to an accelerator (not shown). The electromagnetic clutch actuating rod 32 rotates around the accelerator shaft 31, and the electromagnetic clutch switch 35 is attached to a certain point on the circumference of the tip of the electromagnetic clutch actuating rod 32, which has a roller 33 attached to the tip.
3, so that it can be press-fitted. The electromagnetic clutch switch 35 uses a push switch that is configured to be energized by one press-contact and cut off by the next press-contact, and its installation position is such that the number of revolutions of the engine 6 is within the movable range of the accelerator lever 3. The point of low speed rotation, or the point where low speed rotation changes to high speed rotation, in this example, 1600 rpm as shown in Figure 4.
Install it at the location.

FIG. 3 is an electrical circuit diagram of a remote control circuit in an embodiment in which a relay is used instead of a push switch. Bu is the battery, Sh is the manual switch, Sw is the starting switch, and Mc is the electromagnetic clutch. Ry is a relay for self-holding, D ₁ ,
_D2 is a diode, which is a device that is incorporated as necessary for the purpose of noise prevention and circuit protection in the event of wiring errors, etc.

Next, to explain the operation of these embodiments, the manual switch Sh (Fig. 3) connected in series to the electromagnetic clutch switch is closed, and the accelerator lever 3 is turned to S.
When it is rotated from the point (FIG. 4), the electromagnetic clutch operating rod 32 is also rotated at the same time, and the engine 6 is started and accelerated by the wire 34. At point M where the engine 6 is at a constant rotation speed in the low speed range, the roller 33 of the electromagnetic clutch operating rod 32 automatically presses and closes the electromagnetic clutch switch 35, and the electric circuit is energized to the electromagnetic clutch 17. . When the electric circuit is activated, the excitation coil 26 built into the clutch stator 23 is activated, and the elastic plate 28 is expanded by its magnetic force, and the friction plate 29 is strongly connected to the rotor 21, causing the blower blades 9 to move. The rotating shaft 18 starts rotating. Then, by rotating the accelerator lever 3 as it is and gradually accelerating the engine 6, the blower blades 9 smoothly reach the rotation required for the predetermined spraying operation without generating an impact force (point N). In this embodiment, when the start switch 35 is closed (M
The engine rotation speed at point) is 1600 rpm, the standard rotation speed of the blower blade 9 during work (point N) is 2400 rpm, and the required horsepower is 14 to 15 Ps. Even when decelerating the engine 6, the electromagnetic clutch switch 35, which is a push switch, etc., is pressed by the roller 38 of the electromagnetic clutch operating rod 32, so the circuit to the electromagnetic clutch 17 is in a power out state, and the magnetic force of the electromagnetic clutch 17 is reduced. The friction plate 29 is replaced by the elastic plate 28.
The blower blade 9 is separated from the rotor 21 by
stops rotating. Moreover, when the work is finished or when it is desired to stop the spraying while the vehicle is running, the rotation of the blower blades 9 can be stopped by turning off the manual switch Sh.

(g) Effects As mentioned above, this invention consists of an electromagnetic clutch that connects the engine and the blower blades in a drive vehicle equipped with a chemical sprayer, and the connection is made by a remotely controllable electric circuit. This has the effect of minimizing mechanical breakdowns, machine damage, and operational complexity. At the same time, the electromagnetic clutch closes and the blower blade starts when the engine is in a certain low speed range, lower than when the engine is working, so the rotational impact force when the blower blade starts is softened and the electromagnetic clutch is formed. It can reduce friction damage between the friction plate and rotor, reduce fatigue of the elastic plate, and allow the device to last longer. Furthermore, by opening and closing the start switch of the electromagnetic clutch using the accelerator lever, it has the effect of providing a small and simple device in which the electromagnetic clutch operates reliably only when the engine speed is constant. .

[Brief explanation of the drawing]

Figure 1 is a left side view of the drive vehicle carrying the chemical sprayer, Figure 2 is a sectional view of the electromagnetic clutch, Figure 3 is an electrical circuit diagram of the electromagnetic clutch operating device, and Figure 4 is the accelerator lever and starting switch. FIG. A... Control section, B... Chemical tank section, C... Engine section, D... Chemical sprayer, 1... Drive vehicle, 3
... Accelerator lever, 6 ... Engine, 9 ... Blower blade, 14 ... Driving shaft, 17 ... Electromagnetic clutch, 18 ... Rotating shaft, 31 ... Accelerator shaft, 32
...Electromagnetic clutch operating rod, 35...Switch for electromagnetic clutch.

Claims (1)

[Scope of Claim for Utility Model Registration] For an electromagnetic clutch in which the driving shaft of the engine of the drive vehicle carrying the chemical sprayer and the rotating shaft of the blower blade are removably connected by an electromagnetic clutch, and the electromagnetic clutch is provided in the control section. In an electromagnetic clutch operation device connected to a switch by a remote control circuit, an accelerator lever is attached to the accelerator shaft to increase or decrease the rotation of the engine by rotating around the accelerator shaft, and an electromagnetic clutch operating rod is linked to the rotation of the accelerator lever. Install the electromagnetic clutch switch in a position where the tip of the electromagnetic clutch actuating rod that is linked to the accelerator lever can come into contact when the accelerator lever is operated so that the engine rotates at a lower speed than during chemical spraying work. An electromagnetic clutch operating device for a drive vehicle equipped with a distinctive chemical sprayer. An electromagnetic clutch operating device for a drive vehicle equipped with a chemical liquid sprayer as claimed in claim 1, wherein the switch for the electromagnetic clutch is a push switch that is energized by one press-contact and shuts off the power by the next press-contact.