JPH0233455Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention mainly relates to a swing operating device for a walking type rice transplanter.

[Conventional technology]

This type of swing control device has independent hydraulic cylinders that operate the wheels mounted on the left and right sides of the rice transplanter body up and down, and the rice field ground pressure applied to the floats on the left and right sides of the rice transplanter body controls each hydraulic cylinder. It is known to include a hydraulic valve for controlling a corresponding hydraulic system. Each hydraulic cylinder is individually provided with a buffer spring in order to alleviate the left and right inclination during traveling operation.

[Problem that the invention aims to solve] The problem here is that in walk-behind rice transplanters, such as those used for two-row planting, there is no need to twist the steering handle, etc.
When the left and right balance of the aircraft is lost, the buffer springs act individually, causing the aircraft to wobble. In other words, if each wheel is configured to swing independently on the left and right, and a spring is installed corresponding to each hydraulic cylinder, the handle will be pulled sideways to move the seedling platform laterally or to control straight movement. When doing things like this, the springs bend and the aircraft tilts, making it difficult to travel straight.

[Means to solve the problem]

The present invention was developed based on the above circumstances, and is a system in which the left and right sides swing simultaneously by supporting the pivot points of the rice transplanter main body of each hydraulic cylinder so that they work together, and by applying a common spring force thereto. The present invention aims to provide a swing operating device for a rice transplanter that improves winging when traveling straight. For this purpose, the present invention uses independent hydraulic cylinders to vertically operate the wheels attached to the left and right sides of the rice transplanter body, and to control each hydraulic cylinder using ground pressure on the rice field applied to floats on the left and right sides of the rice transplanter body. and a hydraulic valve for controlling the corresponding hydraulic system, the pivot points of the hydraulic cylinders on the rice transplanter main body side are supported by a crank support member so as to move in cooperation with each other, and are common to both hydraulic cylinders. The invention is characterized in that a buffer spring is provided on the crank support member.

[Effect]

With the above configuration, the present invention allows the left and right wheels to swing at the same time, allowing for good straight-line performance and highly accurate rice planting work.

【Example】

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. In the figure, reference numeral 1 is the main body of the rice transplanter, which is equipped with an engine 2, a transmission 3, etc. on the front part, and chain cases 4, which also serve as swing arms, are pivotally supported on the left and right sides of the rice transplanter. At the free ends of the cases 4, 4, running wheels 5, 5 supporting the rice transplanter main body 1 are pivotally supported. Driving force is transmitted from the transmission 3 to the traveling wheels 5, 5 via a chain transmission system (not shown) provided within the chain cases 4, 4. Swing arms 6, 6 are attached to the chain cases 4, 4, and piston rods 9, 9 of hydraulic cylinders 8, 8 having one end pivotally connected to a crank support member 7 are pivotally connected thereto. The crank support member 7 includes swing arms 7a, 7a on both sides, which are pivotally connected to the hydraulic cylinders 8, 8, and a large support arm 7 in the center.
b, and a piston 10 is connected to this support arm 7b. This Pisun 10
has one end slidably inserted into a cinder 11 pivotally connected to the rice transplanter main body 1, and is elastically supported by a compression coil spring 12. Further, there are sensing side floats 13, 13 located on the left and right sides of the rice transplanter main body 1, the rear portions of which are pivotally connected.
4 are connected by pivoting their lower ends. The sensing rods 14, 14 are connected to a hydraulically controlled pump 16 which receives the power of the engine 2 via a belt transmission system 15.
The hydraulic valves 17, 17 are connected via operating arms 18, 18 to independent hydraulic valves 17, 17 provided therein. In the figure, reference numeral 19 is a planting rod provided at the rear of the rice transplanter main body 1, 20 is a mechanism for driving this planting rod 19, 21 is a seedling stand, 22 is a rear float, 23
is the steering wheel. In such a configuration, when the sensing rods 14, 14 are moved up and down due to fluctuations in ground pressure on the rice fields of the floats 13, 13, the independent hydraulic valves 17, 17 are controlled via the operating arms 18, 18, and the hydraulic pressure is increased. Controls the supply and discharge of pressure oil to the cylinders 8, 8. In this way, the wheels 5, 5 are raised and lowered in response to variations in plowing depth, and the left-right balance of the rice transplanter body 1 and the constant planting depth are achieved. On the other hand, during the planting work, the seedling platform 21 reciprocates left and right, but this left-right unbalanced load is applied to both running wheels 5 via the chain cases 4, 4. Therefore, when a balancing force is applied to the steering handle 23, this acts on each hydraulic cylinder 8, 8, but since both are supported by the crank support member 7 and resiliently supported by a common spring 12, both Since the pivot points of the hydraulic cylinders 8, 8 are moved simultaneously on the left and right sides, unlike when each hydraulic cylinder 8, 8 is supported individually, there is no wobbling of the action of the aircraft, and the balance force applied to the steering handle 23 is reduced. works effectively, the left and right balance of the rice transplanter main body 1 is maintained, and stable straightness is obtained.

[Effect of the idea]

In this invention, as described in detail above, the left and right hydraulic cylinders that swing independently are supported by a common buffer spring via a common crank support member, so that the left and right balance during driving is maintained by the steering wheel. It can be easily adjusted by operation, etc., and as a result, there is no wobbling from side to side and straightness can be ensured.

[Brief explanation of drawings]

Figure 1 is a side view showing one embodiment of the present invention;
The figure is a plan view of the same, and FIG. 3 is a perspective view of the main part. DESCRIPTION OF SYMBOLS 1... Rice transplanter main body, 2... Engine, 3... Mission, 4... Chain case, 5... Traveling wheel, 6... Swing arm, 7... Crank support member, 7a... Crank arm, 7b... ...Support arm, 8...Hydraulic cylinder, 9...Piston rod, 10...Piston, 11...Cylinder, 12
... Compression coil spring, 13 ... Side float, 14 ... Sensing rod, 15 ... Belt transmission system, 16 ... Hydraulic control pump, 17 ... Hydraulic valve, 18 ... Operation arm, 19 ... Planting rod , 20
... Drive mechanism, 21 ... Seedling stand, 22 ... Rear float, 23 ... Steering handle.

Claims (1)

[Scope of claim for utility model registration] Compatible with both hydraulic cylinders by independent hydraulic cylinders that operate up and down the wheels attached to the left and right sides of the rice transplanter body, and ground pressure on the rice field applied to the floats on the left and right sides of the rice transplanter body. In a rice transplanter equipped with a hydraulic valve for controlling a hydraulic system, the pivot point of the hydraulic cylinder on the rice transplanter main body side is supported by a crank support member so as to move in cooperation with each other, and is common to both hydraulic cylinders. A buffer spring that
A swing operating device for a rice transplanter, characterized in that it is provided on the crank support member.