JPS58185309A - Machine body lifting and lowering device by hydraulic pressure - Google Patents

Abstract

PURPOSE:To facilitate the handling of a device while simplifying the construction of the device by controlling the hydraulic pressure in each chamber after connecting both wheels of an transplanting machine, etc., to the piston shaft of a hydraulic cylinder composed of two pistons and three chambers. CONSTITUTION:A hydraulic cylinder 26 is devided into three chambers by two pistons not shown in the drawing. When the hydraulic pressure is unchanged in the middle right chamber, low in the left chamber low, and high in the central chamber by the operation of a three-way cock 36, a left piston shaft 33 is forcedly moved, and an arm 40 is turned via the rotation of an arm 38 and a rotary shaft 39. A connecting rod 42 is pushed by said rotation so that a chane case 15 rises around a wheel shaft 12. Thus, one side of a machine body is lifted, allowing said body to be inclined. When the hydraulic pressure in the left and right chambers of the hydraulic cylinder 26 is reduced and both pistons are moved to the left and right, the whole of the machine body is lifted. When the hydraulic pressure in the right chamber is reduced, the body is inversely inclined. With this constitution, it is possible to facilitate the handling of the machine body with the simple structure of the device using only one hydraulic cylinder.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for adjusting airframe height, and provides a device for raising and lowering an aircraft body, particularly suitable for use on slopes.

Agricultural equipment, such as rice transplanters, transplanters, weeders, row spreaders, harvesters, etc., are designed to maintain their bodies horizontally and to be able to operate normally only when performing agricultural work. However,
Since the field is not necessarily level, special measures have been taken to keep the aircraft level. In addition, when using a field farming machine on a slope, it is more important to keep the machine level than in areas where rice fields and crystal slopes are steep. Conventional devices for keeping the aircraft horizontal use various link mechanisms and mechanisms that use hydraulic machines to adjust according to the angle of inclination, but the former is inconvenient to handle and impractical. In recent years, the latter has mainly been adopted.

The height of the aircraft can be adjusted using a conventional hydraulic machine. For example, a hydraulic cylinder is attached to each of the wheels that support the aircraft, a hydraulic pump is installed on the driving minochon of the aircraft, and the left and right hydraulic cylinders are connected via a control pulp and a check valve. The system adjusts the hydraulic pressure of the aircraft to level the aircraft, and closes the shaft valve to maintain the aircraft horizontally. Another idea is to support the wheels on both sides via hydraulic cylinders, connect both cylinders with a pipe, and use a handle to flow oil to one side and maintain the level, but in both cases two hydraulic cylinders are used. This method not only makes the device expensive, but also requires multiple steps, making it inconvenient to handle.

The inventor of the present invention conducted research to create an aircraft height adjustment device that is inexpensive and convenient to handle, and as a result, the inventor decided to use one hydraulic cylinder, and had piston shafts extending from both sides of the cylinder and connecting them to both wheels. This problem was solved by dividing the interior of the hydraulic 7 cylinder into three chambers by two pistons, and controlling the oil in each chamber with a control valve.

That is, according to the device of the present invention, it is possible not only to move the aircraft up and down while keeping it horizontal, but also to freely tilt it in either the left or right direction.

Next, an example in which the device of the present invention is mounted on a transplanter will be explained. In the figure, 1 indicates the machine frame, an engine 2 is mounted in front of the machine frame 1, and a mission 3 is attached to the engine 2.
A hydraulic machine 4 is attached to the mission 3. The power decelerated by the mission 3 is transmitted to the intermediate shaft 6 via the chino 5, and a gear 7 is fixed to one end of the shaft 6.

This gear 7 meshes with a gear 9 fixed to a drive shaft 8,
The drive shaft 8 crosses the fuselage and has chain wheels to, t at both ends thereof.
o is fixed. The chain wheels 10.10 are each connected to a chain wheel 13.13 fixed to the axle 12.12 of the rear wheel 11.11.
The chains 14 and 14 are stretched between the two, and the rear wheels 11 and 11 are rotated to move the aircraft in the direction of the arrow. Moreover, the drive shaft 8
A chenoke case 15 is provided between the rear wheels 11 and the axle 12 so that the body is supported by the rear wheels 11. Although the details are omitted in the illustration, a planting mechanism is provided above the rear wheel 11. are fixed radially, and a transplant beak 18 is suspended from each pair of support rods 17, 17, and each transplant beak 18 is always maintained up and down and rotated. This rotation is caused by a chain wheel (not shown) provided on the drive shaft and a chain wheel (not shown) provided on one shaft of the planting mechanism 16.
(not shown) and is rotated by the engine 2. Further, an opening/closing operation plate 19i is fixed to one of the opposing supporting rods 17, and when the transplant beak 18 is in the upper position, it does not come into contact with the transplant beak, and the transplant beak maintains the closed state, but when it rotates downward, it comes into contact. It is designed so that it can be opened.

Therefore, when vinegar is taken from the planting stand 20 at the top and put into the transplant beak 18, it plunges into the ground below and opens to make a planting hole, into which the seedlings are released and planted.

Two support rods 21 and 22 are provided in parallel to each other on both the left and right sides of the front lower part of the machine frame 1, and the support rods 21 are fixed to a horizontal shaft 23 fixed to the machine frame 1 so that their mounting positions can be adjusted. , the other end rotatably supports the axle 25 of the front wheel 24, one end of the support rod 22 is supported by a horizontal shaft 22' provided in the machine frame 1, and the other end is supported by the axle 25. It is installed on. For this purpose, the guide plate 24' forms a link with the support rods 21, 22, is parallel to the machine frame 1, and when placed on both sides of the ridge A, the machine body is guided by the ridge A and travels. Although not shown in the figure, when the aircraft reaches a headland and turns over, if the support rod 21 is lifted by a hydraulic machine or other means, the front wheels 24 will rise above the headland, making the turn over easier.

A hydraulic cylinder 26 is fixed in the direction of movement of the machine above the chino case 15 at the center of both machine frames 1, 1, and its central portion is supported by a stand 28' fixed to the machine frame 1. The hydraulic cylinder 26, as shown in FIG.
The interior is divided into three chambers: a first chamber 29, a second chamber 301, and a third chamber 310 by two pistons 27 and 28. And the pistons 27 and 28 are respectively axes 33 and 34'! l:
The shafts 33 and 34 are fixed with one length 32° 32 which limits the stroke. In the hydraulic cylinder 26, hydraulic conduits 35', 35', and 35 are opened to a first chamber 29, a second chamber 30, and a third chamber 31, respectively.
3 and 3g'' both communicate with a three-way cock 36 as a control valve. This three-way cock 36 is connected to the hydraulic machine 4 through a hydraulic conduit 35.

For this reason, when the three-way cock 36 is rotated to apply oil pressure to the first chamber 29, oil flows out from the second chamber 30, so the piston 27
moves forward. However, its stroke is limited by the ring 32 so that it does not block the hydraulic conduit 35''.

Further, when hydraulic pressure is applied to the second chamber 30, the pistons 27 and 28 move backward toward the first chamber 29 and the third chamber 31, respectively. In order to control the hydraulic pressure in each chamber of the hydraulic cylinder 26, a known control valve, check valve, or shunt-off valve may be provided by a conventional method, and the three-way cock 36 may be provided with a known solenoid valve or other It is something that can be changed.

Each of the piston shafts 33, 34 has a pin 37 at its end.
The pin 37 is loosely inserted into an elongated hole 37' provided at one end of the curved arm 38, and the arm 38 is raised up so that it can move freely within the elongated hole 37'. It is fixed to one end of the rotation ia@39 which extends in the direction and is rotatably fitted into the machine frame l. The other end of this rotation shaft 39 is fixed to one end of another arm 40,
The other end of the arm 40 is rotatably connected to the upper end of a connecting rod 42 via a pin 41. The lower end of the connecting rod 42 is connected to a stand 43 fixed to the chain case 15 by a pin 44. Incidentally, the piston shaft 34 is connected to the rotating shaft 39' on the other side,
A rotating shaft 39'' is provided parallel to the rotating shaft 39'.

Gear a is fixed to the former, and both wheels are fixed to the latter, and an arm 40' is fixed to the meshing rotating shaft 39'', and the arm 40' and the connecting rod 42 are fixed.
' wo is connected. Therefore, it is supported by the axles 12 of the Chenke carriers 11 on both sides. Therefore, when the arm 38 rotates the rotating shaft 39, the arm 40 fixed to this pushes down the connecting rod 42, causing the aircraft to rise, and when pulled up, the aircraft descends, allowing the height of the aircraft to be adjusted to any desired level. become. For example, the three-way cock 36 may be switched to the third chamber 3.
When the oil pressure of 7 remains unchanged and oil pressure is applied to the second chamber 30, the piston/27 is pushed in the direction of the first chamber 29, and the shaft 33 is extended. At this time, the shaft 33 pushes against the shaft 38, so the rotation shaft 39 rotates clockwise, and the arm 40 fixed to the shaft 39 rotates around the shaft 39. This rotation pushes the connecting rod 42 through the pin 41, so the chain case 15
It will rise centered around 2. This causes one side of the aircraft to rise while the other side does not, causing the aircraft to tilt.

Also piston 27.28'! If you push in the direction of the first and third chambers, the entire aircraft will rise. If only the piston 28 is moved, then, contrary to the above, only one side of the aircraft will be lowered and the aircraft will be tilted towards the other side.

Therefore, by switching the three-way cock 36, the machine body can be tilted to either the left or right direction, or the machine body can be raised or lowered while remaining horizontal.

In addition, 47 in the figure is a lead rock with a three-way cock 36 and a handle 4.
The three-way cock is connected to the switching handle 450 provided in the switch 6 so that it can be operated while driving the three-way cock.

The present invention is constructed as described above, and in a sloping field, the three-way cock 36 can be switched using the switching handle 45, and one side of the machine body can be pulled up to return the machine body to a horizontal position, and the planting depth can be adjusted. In this case, the handle 42 can be supported horizontally and any cylinder shape can be achieved by simply adjusting the amount of hydraulic pressure flowing into the second chamber. Adjusted the aircraft's height and inclination +I? When the shut-off pulp is closed, the oil pressure in chamber 6 29, 30, and 31 is maintained for one hour, so the aircraft will proceed while maintaining its horizontal position. In this way, the hydraulic aircraft lifting device of the present invention can be manufactured at low cost because it can adjust the aircraft with one hydraulic cylinder instead of using several meters of hydraulic cylinders as in the past. This system has many advantages, such as not requiring a large amount of effort to level the aircraft by connecting the left and right hydraulic cylinders with a conduit and making the oil flow by operating the handle.

The device of the present invention is not limited to the above-mentioned self-propelled transplanter, but in the case of a towed transplanter, the device may be connected to a hydraulic machine of a towing vehicle, such as a tractor, and a three-way cock. In addition to transplanting machines, we also have rice transplanters, weeding machines, chemical spraying machines,
When used in general agricultural machinery such as harvesters, it is particularly effective on sloped areas.

[Brief explanation of the drawing]

Figure 1 is a side view of a transplanter equipped with the device of the present invention;
The figure is a longitudinal sectional view of a hydraulic cylinder. 1 Machine frame 4 ・Hydraulic machine 8 ・Drive shaft 11 Rear wheel

Claims (1)

[Scope of Claims] (]) Both wheels of the agricultural machine are connected to piston shafts at both ends of a hydraulic cylinder attached to the machine body, and the interior of the hydraulic cylinder is divided by two pistons to form three chambers, and each chamber has three chambers. An airframe lifting device using hydraulic pressure, which is controlled by a control valve. (2) The fuselage up/down device according to claim 1, wherein the control valve is a three-way valve.