JPH033Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to a one-wheel type paddy field working machine. Specifically, it is a traveling transmission case that is attached to one side of the prime mover, and the rear part of the case is attached to the rear side of the prime mover in the shape of a crank. It has a boss part inside the drive shaft that extends, and a chain case is attached to the tip side of this boss part so that it can freely move up and down. A pair of left and right frames to which the wheels are fixed are extended rearward so as to sandwich the running wheels from the left and right sides, and a paddy field agricultural machine such as a rice transplanter or a seeding machine is attached to these frames, and a control mechanism that extends rearward and upward is attached to the frame of the agricultural machine. A rice paddy work machine with a handle is equipped with a soil leveling float that floats above the top soil of the paddy field and slides while being moved up and down on the lower side of the paddy field work machine, and the oil put into the traveling transmission case is used as hydraulic oil. The present invention relates to a one-wheel type paddy field working machine which is provided with a hydraulic system to control the vertical movement of a traveling wheel by operating a switching valve of the hydraulic system by the vertical movement of the earth leveling float.

This type of rice field work machine is propelled while tilting forward, backward, left and right, so it is difficult to configure the lubrication part that injects oil into the traveling transmission case.
In particular, when an oil filler plug with a breather was provided, problems such as oil leaking from the breather hole occurred when the aircraft was tilted from side to side. This invention eliminates the above-mentioned drawbacks and also prevents oil from leaking from the breather hole even when this type of one-wheeled paddy field work machine is transported by truck upside down with the front section facing downwards. purpose.

In order to achieve this purpose, this invention is based on a traveling transmission case 3 attached to one side of the prime mover 2.
The rear part of the engine 2 has a boss part 3a inside the drive shaft that extends in the shape of a crank, and a chain case 5 is attached to the tip side of the boss part 3a so as to be freely movable up and down. A running wheel 6 is rotatably supported on the leading end of the case 5, and a pair of left and right frames 1, 1 whose bases are fixed to the running transmission case 3 are sandwiched between the running wheels 6 from the left and right sides. The paddy field working machine is equipped with a paddy field working machine A attached to it, and a control handle 8 extending rearward and upward is attached to the frame of this paddy field working machine A. Land leveling float 1 that rises above the topsoil and moves up and down
0 and 11 are provided, and the traveling transmission case 3
The oil pump 15 of the hydraulic device 14, which uses oil introduced into the engine as working oil, is integrally attached to the traveling transmission case 3, and the switching valve 17 of the hydraulic device 14 is installed integrally with the traveling transmission case 3.
is connected to the earth leveling float 11, and the piston of the hydraulic cylinder device 16 is connected to the chain case 5, so that when the earth leveling float 11 moves upward above a certain level, the running wheels 6 are moved downward, and conversely, when the earth leveling float 11 moves upward above a certain level, the traveling wheels 6 move downward, and vice versa. The traveling wheels 6 are configured to move upward when the traveling transmission case 3 is moved downward, and an oil filler tube 23 is provided on the side of the traveling transmission case 3 opposite to the prime mover that projects upward.
Oil filler plug 2 with a breather hole at the tip of this oil filler cylinder 23
4, and the one-wheeled paddy field working machine is configured such that the oil supply cylinder 23 is inclined rearward and upward by approximately 40 degrees to 50 degrees with respect to the horizontal plane when in use.
With this configuration, even if the paddy field machine leans significantly left and right or back and forth when turning, there is no risk of oil leaking from the breather hole of the oil filler valve, and the machine remains stable. Even when the product is transported upside down on a truck, oil never leaks from the oil filler valve, and the effect is to eliminate the situation where the hydraulic system is activated with oil leaking unexpectedly, causing damage. play.

An embodiment of this invention will be described in detail based on the drawings. Reference numeral 1 denotes a frame, a traveling transmission case 3 which also serves as an oil tank, which will be described later, is attached to one side of the prime mover 2, and a rice transplanter as a working machine A. The transmission case 4 with seedlings is connected to the seedling planting transmission case 4, and is provided with a predetermined space left and right.

Reference numeral 5 denotes a chain case, and a boss 3a whose base protrudes to the left side of the transmission case 3 and is wrapped around a drive shaft.
It is pivotally attached to the tip side of the body, with the tip side facing rearward, and is configured to be able to move up and down freely.

Reference numeral 6 denotes a running wheel, which is supported on the rear end side of the chain case 5 so as to be rotated by transmission.

7 is a seedling planting tool, 8 is a control handle, and 9 is a seedling tank.

10 and 11 are ground leveling floats, which are connected to the traveling wheels 6;
The rear part is attached to the seedling planting transmission case 4 with a pin, and the front part is attached to the left and right frames 1, 1 with a connecting rod 12 for vertical movement. 13 is a long hole provided in the continuous rod.

Reference numeral 14 denotes a hydraulic system, which, as shown in FIG. 3, consists of a hydraulic pump 15, a switching valve 17, and a hydraulic cylinder device 16, and the traveling transmission case 3 also serves as the hydraulic tank, as described above. Reference numeral 16a denotes a hydraulic cylinder, the base of which is pivotally connected to the frame 1 via a bracket 18 and a pin 19, and the distal end of the piston 16b and the chain case 5 are connected by an interlocking link 20.
The running wheels 6 move downward when the piston 16b protrudes, and move upward when the piston 16b is retracted. 2
1 is a rod, which includes the switching valve 17 and the soil leveling float 1.
1, and when the earth leveling float 11 is pushed up above a certain level, the piston 16b is moved to the protruding side.
On the other hand, when it moves downward, the switching valve 1 is controlled to the retracting side.
7.

Reference numeral 23 denotes an oil supply cylinder, which is attached to the side opposite to the prime mover of the traveling transmission case 3, and when viewed from the side,
The lubricating valve 24 is oriented rearward and upward, and is configured such that the angle θ of the upward rearward direction with respect to the horizontal plane during working conditions is approximately within the range of 40 degrees to 50 degrees. ing.

In the configuration of the above example, during the seedling planting work, the body of the working machine is propelled without significantly tilting to the left or right, and at this time, the traveling transmission case 3 maintains approximately the state shown in FIG. 3. When turning near a ridge, the front part of the aircraft is lowered and the aircraft leans greatly toward the turning side because it is a single-wheeled aircraft, but even in this case, as shown in Figures 4 and 5, The oil in the traveling transmission case 3 is rotated without reaching the oil filler cylinder 24, and no oil leaks from the breather hole.

Also, when transporting a large number of working machines by truck, etc., when the working machine is held upside down using the inverted support frame village B, as shown in Fig. 7, the oil does not reach the lubrication plug 24. This prevents oil from spilling from the breather hole.

[Brief explanation of the drawing]

The figures show a single-wheeled rice transplanter as an example of this invention. Figure 1 is a side view, Figure 2 is a plan view, Figure 3 is a hydraulic circuit diagram, and Figure 4 is a main part. 5 and 6 are simplified rear views of the main parts, and FIG. 7 is a side view of the main parts when the working machine is inverted. Symbols in the figure: 1 is the frame, 2 is the prime mover, 3 is the running transmission case, 3a is the boss, 5 is the chain case, 6 is the running wheel, 8 is the control handle, 1
0 and 11 are soil leveling floats, 14 is a hydraulic system, 15
is an oil pump, 16 is a hydraulic cylinder device, 1
7 is a switching valve, 23 is a lubricant cylinder, and 24 is a lubricant tap.

Claims (1)

[Scope of utility model registration request] A running transmission case 3 is attached to one side of the prime mover 2, and a boss portion 3 inside the drive shaft whose rear part extends in a crank shape to the rear side of the prime mover 2.
a, a chain case 5 is attached to the tip side of the boss portion 3a so as to be able to move up and down freely, and a running wheel 6 is rotatably supported on the tip side of the chain case 5 so as to be able to transmit rotation. A pair of left and right frames 1, 1 whose bases are fixed to the case 3 are extended rearward so as to sandwich the running wheels 6 from the left and right sides, and a rice paddy agricultural machine A is attached to these frames. A paddy field work machine is equipped with a control handle 8 extending rearward and upward on the paddy field work machine.Earning floats 10 and 11 that float above the topsoil of the paddy field and move up and down are provided on the lower side of the paddy field work machine, and the traveling transmission case 3 The oil pump 15 of the hydraulic system 14, which uses oil input into the engine as hydraulic oil, is integrally attached to the traveling transmission case 3, and the hydraulic system 1
The switching valve 17 of No. 4 is connected to the earth leveling float 11, and the piston of the hydraulic cylinder device 16 is connected to the chain case 5.
1 moves upward above a certain level, the running wheel 6 moves downward, and conversely, when moving downward above a certain level, the running wheel 6 moves downward.
A lubricant cylinder 23 is provided on the side of the traveling transmission case 3 opposite to the prime mover that protrudes upward, and a lubricant plug 24 with a breather hole is provided at the tip of the lubricant cylinder. A single-wheel type paddy field working machine configured such that the part 23 is tilted approximately 40 degrees to 50 degrees with respect to the horizontal plane when in use, and faces rearward and upward.