JPH0356285Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a speed sprayer that makes it possible to transmit and interrupt drive to the front wheels.

(Prior Art) Many speed sprayers of this type are configured to drive front wheels and rear wheels so that they can easily travel on rough terrain such as orchards.

(Problem that the invention aims to solve) The speed sprayer described above runs at low speed in the orchard while spraying chemicals, but it is required to run at high speed when moving from orchard to orchard. There is. However, there is a problem in that driving the front and rear wheels increases fuel consumption.

Furthermore, since the terrain inside the orchard is uneven, there is a problem in that if one of the front wheels and rear wheels lifts off, a difference in rotation occurs.

(Means for Solving the Problems) The speed sprayer according to this invention has the following configuration in order to solve the above problems.

In a speed sprayer that transmits the driving force from the driving source to the front wheels and the rear wheels, a clutch (electromagnetic clutch 26) is provided in the middle of the transmission system of the driving force to the front wheels 30, and a clutch (electromagnetic clutch 26) is provided to control the rotational speed of the front wheels. The present invention is characterized in that a cam clutch 44 is provided for connecting and disconnecting the driving force of the front wheels to the transmission system accordingly.

(effect) Next, we will discuss the effect of this idea.

When driving from one orchard to another, the electromagnetic clutch 26 is activated to cut off the driving force to the front wheels, allowing the vehicle to travel at high speed.

In this case, the means for transmitting the driving force to the front wheels is not driven, but since the front wheels rotate, the cam clutch 44 works and the rotational force of the front wheels is not transmitted to the transmission system.

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

FIG. 1 is a plan view showing the drive mechanism of a three-wheeled speed sprayer.

10 is an engine. Drive power from the engine 10 is coupled to an intermediate transmission 14 via a main clutch 12. The driving force is then branched at an intermediate transmission 14. 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.

Further, the driving force is transmitted from the intermediate transmission 14 to the front wheels 30 via an electromagnetic clutch 26 and a driving force transmission system 28.

2 and 3 are a side view and a front view showing the front wheel portion of the speed sprayer.

Reference numeral 32 denotes a vehicle body frame, and a neck 36 for supporting a steering shaft 34 extends obliquely upward from the tip of the vehicle body frame 32. A bearing 38 that rotatably supports the steering shaft 34 is provided at the tip of the neck 36.

An arch-shaped support frame 40 is provided at the lower end of the steering shaft 34, and an axle 42 is installed at both lower ends of the support frame 40.
The front wheel 30 is attached to the axle 42 by the cam latch 4.
It is pivoted via 4. This cam clutch 4
4, when the front wheels 30 try to rotate faster than the rotation of the axle 42, the front wheels 30 spin idly.

Further, the upper end of the steering shaft 34 is connected to a steering device (not shown) such as a handle or a Peatman arm.

Further, the gear unit 50 is supported by the first support arm 48 extending from the upper end of the steering shaft 34.
is supported. A sprocket 50a is provided on the side of the gear unit 50, and a first transmission shaft 50b extends rearward. And the first transmission shaft 50
Bendable and rotatable joint 5 at the rear of b
2 to the second transmission shaft 54. The second transmission shaft 54 is supported by a bearing 58 provided at the upper end of a second support arm 56 rising from the middle of the neck 36. Further, a sprocket 60 is provided at the rear end of the second transmission shaft 58 and is connected to the transmission system 28.

On the other hand, a bearing 62 is fixed to the upper right end of the support frame 40 shown in FIG.
b is provided. One sprocket 64a is connected to the sprocket 50a of the gear unit 50 via a transmission belt 66.
Further, the other sprocket 64b is connected to the axle 4.
The transmission belt 68 is connected to a sprocket 42a provided at one end of the transmission belt 68.

Reference numeral 70 is an adjustment member for adjusting the slack of the transmission belt 66. This adjustment member 70 is connected to the sprocket 6.
The transmission belt 6 is mounted on a support plate 70c that extends downward from the gear unit 50.
6 and is configured to be able to freely approach and separate.

The speed sprayer of this invention is constructed as described above. Next, the operation of this speed sprayer will be explained.

When traveling on rough terrain such as an orchard (when moving forward at low speed), the main clutch 12 is connected to drive the rear wheels 22 and front wheels 30.

In this case, if there is a rotation difference between the front and rear wheels,
The front wheel 30 idles due to the action of the cam clutch 44, absorbing the difference in rotation.

When moving from one orchard to another (when moving forward at high speed), the electromagnetic clutch 26 is operated to cut off the transmission system 28 to the front wheels 30.

In this case, the rotational force of the front wheel 30 is not transmitted to the transmission system 28 due to the action of the cam clutch 44. Therefore, the running resistance of the front wheels 30 is small and smooth running can be achieved.

In the above embodiment, the electromagnetic clutch 2 is used to connect and disconnect the engine 10 to the transmission system 28.
6 is used, but a manual type may also be used. Furthermore, although three-wheel drive has been described, in the case of four-wheel drive, the two front drive wheels may be constructed in the same manner as described above.

(Effects of the invention) As explained above, this invention has a clutch that connects and disconnects the driving force from the engine to the front wheels, and a cam clutch on the front wheels, so when the transmission of driving power to the front wheels is cut off, , the front wheels do not spin and do not transmit the rotational force of the front wheels to the transmission system, allowing smooth running with low running resistance. Additionally, if there is a difference in rotation between the front and rear wheels, the cam clutch absorbs it, allowing smooth driving.

Although various preferred embodiments of this invention have been described above, it goes without saying that this invention is not limited to the above-mentioned embodiments, and many modifications may be made without departing from the spirit of the invention. Of course, it can be done.

[Brief explanation of the drawing]

Figure 1 is a drive system diagram seen from the plane of the speed sprayer, Figure 2 is a side view of the front wheel, and Figure 3 is a side view of the front wheel.
The figure is a partially sectional front view of the front wheel portion. 10...Engine, 12...Main clutch, 22
... Rear wheel, 26 ... Electromagnetic clutch, 30 ... Front wheel, 34 ... Steering shaft, 36 ... Network, 40 ... Support frame, 44 ... Cam clutch, 66, 68 ... Transmission belt.

Claims (1)

[Scope of Utility Model Registration Claim] In a speed sprayer that transmits driving force from a drive source to front wheels and rear wheels, a clutch that connects and disconnects the driving force to the front wheels is provided in the middle of the transmission system of the driving force to the front wheels. A speed sprayer characterized in that it is provided with a cam clutch that connects and disconnects the front wheels to the transmission system according to the rotational speed of the front wheels.