KR100397364B1 - direction changing device of cultivator using oil-pressing cylinder - Google Patents

Abstract

The present invention is a conventional cultivator steering device, in the conventional cultivator directional change device by the hydraulic cylinder, oil pump and oil tank, check valve, the directional valve is provided separately and connected to improve the piping structure And, the operation of the check valve and the direction switching valve to be sequentially operated in sequence by opening and closing sequentially by one operating lever,

The operation method is very simple and simple, and the check valve is operated after the operation of the directional valve with only one lever, and the amount of hydraulic pressure supplied by the check valve is arbitrarily adjusted, so the direction change by the hydraulic pressure is more precise and simple. And it is related to the direction changer of the cultivator using a hydraulic cylinder that improves the operation structure, more convenient maintenance and management, hardly occurs malfunction and operation deviation.

Description

Directional device for cultivator using hydraulic cylinder {direction changing device of cultivator using oil-pressing cylinder}

The present invention relates to a directional device for a cultivator, which is easy to steer while operating and improves safety while mounting a separate directional device by a hydraulic cylinder in a general cultivator.

Cultivators are mainly used for transporting or farming in various farmhouses, and are classified into a head unit equipped with front wheels and an engine and a loading box equipped with rear wheels, and used for transporting or transporting cargo by connecting the head unit and the loading box to each other. In the state that the loading box is removed, various cultivation equipment is mounted on the head of the cultivator, and various kinds of mechanical work required for farming can be performed by the power of the cultivator.

Since the front wheel is very rough, such a tiller can be easily operated in uneven floors or puddles such as dirt roads or rice fields and fields, and it is very widely used because of its simple operation and simple operation.

In addition, the transport and cultivation means such as tractors are powerful, quick and able to perform a variety of functions, but it is not possible to turn sharply or stop in actual farmland such as paddy fields or fields, and the rotation radius of the vehicle is very high. It is almost impossible to use in relatively small arable land, and because of the nature of Korea, there are many parts that are not cleared of high cold land and farmland, so in these places, tiller is much more useful than tractor.

In addition, the direction changer of the tiller is a method of cutting off the power of the front wheels located on both sides of the head. When the power of one side is cut off, the front wheel stops rotating due to friction with the ground and the other front wheel continues As the cultivator rotates to the side where power is cut off because it rotates, the direction is changed. On the contrary, when the front wheel power is cut off on the other side, the traveling direction of the cultivator is changed to the corresponding side.

On the downhill road, however, the powered off side rotates more quickly than the wheel on the side powered by the load of the cultivator itself and the load of the loading box. Steering must be done.

In such a conventional tiller, farmers are gradually aging, and the elderly are not suitable to operate a tiller that needs to be steered with a constant force, and when the downhill steering method is mistaken, the steering is completely opposite to the driver's intention. It is also a cause of major accidents.

In addition, when driving on unpaved roads and uneven roads, when one side of the power is cut off for turning, and the wheels pass through puddles or protrusions, the head of the tiller suddenly turns and suddenly, regardless of the driver's intention, Since steering is very dangerous, there is a problem that causes the tiller head to overturn.

Therefore, as in the patent application No. 62069 of 2000 issued by the applicant of the present invention, a hydraulic cylinder operated by hydraulic pressure is connected to the loading box and the head of the tiller, and the hydraulic cylinder is operated in accordance with the steering direction of the driver. As the head part is forced to rotate, steering is possible by simple lever operation by using the hydraulic pressure generated by the power of the tiller, which has been steered by the driver's power as in the prior art, so that anyone can use it conveniently and prevent sudden operation and safety accidents. In addition, since the operation can be performed in the same direction even in the downhill, the direction changer of the tiller is more convenient.

However, since the conventional tiller turning device needs to operate the double lever, the operation is cumbersome and there is a risk of misoperation. Since the volume of the cylinder is not the same as the left and right of the piston, the operating lever is operated the same. Since the steering angle is not the same even in the state, one side had to close the cylinder for longer or shorter time.

In addition, the overall configuration is very complicated, and because the check valve is not separately configured and built in the oil tank, it is impossible to check, repair or replace the check valve. Because the operation by the indirect power transmission by the wire rather than the operating method is a problem that the exact control force of the user is not transmitted as it is, the user can not operate the tiller exactly as intended.

The present invention has been made to eliminate the problems described above, in the direction changer of the conventional tiller by the hydraulic cylinder, provided with an oil pump and an oil tank, a check valve, a direction switching valve, respectively, and connecting them By improving the piping structure, the operation of the check valve and the direction switching valve that must be operated sequentially in sequence by continuously opening and closing by one operation lever,

The operation method is very simple and simple, and the check valve is operated after the operation of the directional valve with only one lever, and the amount of hydraulic pressure supplied by the check valve is arbitrarily adjusted, so the direction change by the hydraulic pressure is more precise and simple. In addition, it is an object of the present invention to provide a direction changer for a tiller using a hydraulic cylinder that improves the operation structure, which is more convenient to maintain and manage, and rarely causes malfunction and operation deviation.

1 is a side view of a state mounted to the cultivator of the present invention the direction changer

Figure 2 is an overall perspective view of the present invention the device for turning direction

3 is a plan view of the present invention the device for turning direction

4 is a configuration diagram of the connection device of the present invention, a straight line operation

Figure 5 is a configuration diagram when the cylinder of the present invention the direction change device advanced

6 is a configuration diagram when the cylinder of the present invention redirection device retracted

Figure 7 is a partial detailed view showing the operating plate of the present invention a direction switching device, a position diagram in the case of a linear operation

8 is a state diagram when the operating plate of the present invention the direction switching device is rotated to one side

Figure 9 is a state diagram when the operating plate of the present invention direction switching device rotated to the other side

10 is a view showing the operation of the direction switching valve by the operating plate of the direction switching device of the present invention, a state diagram in a linear operation state

Figure 11 is a state of rotating the direction switching valve by rotating the operation plate of the present invention direction change vehicle to one side

12 is a state in which the direction change valve and the check valve is operated by the operation plate of the present invention direction switching device

Figure 13 is a state diagram of rotating the direction switching valve by rotating the operation plate of the present invention direction switching device to the other side

14 is a state diagram in which the direction change valve and the check valve are operated to the other side by the operation plate of the direction change device of the present invention;

15 is a detailed view of the lever operation and operating plate connection of the present invention the device for turning direction

Explanation of symbols on the main parts of the drawings

1: loading box 2: head

3: hydraulic cylinder 4: oil pump

5: oil tank

10: check valve 11: conversion lever

12,12 ': Fluid pipe 13,13': Fluid pipe

14: long hole 15: working arm

20: direction change valve 21, 21 ': fluid pipe

22: fluid pipe 23: protruding jaw

24: disc 25: axis of rotation

30: dual operation means 31: support

32: guide groove 33: operating plate

34: handle 35: lever

36: guide rod 37,37 ': return spring

38: spring 40: roller

Hereinafter, preferred embodiments of the present invention will be described.

1 is a side view of a state in which the present invention the turning device is mounted, Figure 2 is an overall perspective view of the turning device of the present invention.

A hydraulic cylinder (3) is provided which connects the loading box (1) and the head (2) of the tiller to each other, and is equipped with an oil pump (4), an oil tank (5), and a check valve (10) for operating the hydraulic cylinder (3). In the conventional cultivator direction change device, the directional valve 20 is connected by a plurality of hydraulic pipes,

The check valve 10 is connected with a conversion lever 11 and a plurality of fluid pipes 12, 12 ', 13, 13', and the fluid pipes 12, 12 ', 13, 13'. ) Are connected to the front and rear of the hydraulic cylinder (3) and the oil pump (4) and the oil tank (5), respectively, and the end of the operating arm (15) having a long hole (14) formed at the upper end of the conversion lever (11). Hinges,

The directional valve 20 is formed with fluid pipes 21, 21 ', 22 connected to the front and rear sides of the oil pump 4 and the hydraulic cylinder 3, respectively, and the rotation shaft of the directional valve 20 ( 25 is equipped with a disk 24 having a protruding jaw 23 to open and close the fluid pipes 21 and 21 'by the rotation of the disk 24.

The dual operation means 30 for simultaneously operating the operation arm 15 of the check valve 10 and the disc 24 of the directional valve 20 is mounted separately,

Dual actuating means 30 is rotatably mounted to the operating plate 33 having the guide groove 32 formed on the bottom by a vertically placed support 31, the handle 34 is formed on the upper portion of the operating plate 33 The lever 35 is mounted, and the lower side of the operating plate 33 is equipped with a guide rod 36 so that one side is inserted into the guide rod 36 and the other side has a fixed return spring 37 (37 '). Combine,

The upper end of the disk 24 and the support 31, which were described above, is coalesced by a separate spring 38, and the protruding jaw 23 of the disk 24 is inserted into the guide groove 32 of the operating plate 33. The long hole 14 of the operation arm 15 is slidably coupled to an intermediate portion of the operation plate 33.

In addition, the roller 40 is coupled to the protruding jaw 23 of the disk 24, so that the protruding jaw 23 of the disk 24 moves the guide groove 32 of the operating plate 33 more smoothly. You can do it.

In addition, the shape of the guide groove 32 of the operating plate 33 described above is configured to have a "W" shape in which both ends are raised and the center is melted upward.

When described in more detail by the accompanying drawings the operation structure and action of the present invention cultivator direction change device according to the above configuration as follows.

As shown in FIGS. 2 and 3, the directional device for the cultivator of the present invention operates a double actuating means formed on one side of a driver's seat, and the hydraulic cylinder 3 connecting the loading box 1 and the head 2 of the cultivator is By operating, since the tiller head 2 is forcibly rotated by the appearance of the hydraulic cylinder 3, it is possible to easily change the direction without a separate steering means.

Referring to the operation state by the schematic configuration diagram of the present invention, the present invention, as shown in Figure 4, the present invention the direction switching device is to change the use and suspension of the user's arbitrarily, the hydraulic cylinder ( If only the fluid provided in 3) is blocked, the operation of the hydraulic cylinder 3 will not be prevented. Incorrect operation or children's accidental misoperation prevents accidents.

In addition, as described above, in the case of running in the usual manner without using the direction switching device of the present invention, the hydraulic cylinder 3 has no fluid pressure, that is, the cylinder rod is moved back and forth by a predetermined force. It is in a state of free reciprocation, which uses a separate fluid pipe 22 by means of a directional valve 20 to connect the fluid pipes 21 and 21 'connected to the front and rear sides of the hydraulic cylinder 3. By communicating with the tank 5, the hydraulic cylinder 3 is compressed or drawn out naturally without load by the operation of the conventional steering apparatus by vibration of the tiller or user's operation.

That is, when the hydraulic cylinder (3) is operated by the shock and vibration generated while the hydraulic cylinder (3) is drawn out, compressed or uneven by the operation of the conventional steering device before and after the piston of the hydraulic cylinder (3) The fluid filled in is to move the fluid at the same time as the operation of the hydraulic cylinder (3). When one side of the fluid is compressed by the operation of the cylinder, the compressed fluid is the oil tank through the modified directional valve 20 The other side of the cylinder which is discharged to the (5) side and expands at the same time changes to the low pressure side according to the movement of the piston and draws and fills the oil on the oil tank (5) side to make the pressure parallel.

Therefore, when the hydraulic cylinder 3 is in a state where the hydraulic pressure is not applied, that is, when the linear movement is performed without changing the direction, the hydraulic cylinder 3 is freely operated so that the cultivator does not overdo the impact and vibration even in the conventional manner. You can move by range.

In addition, as shown in FIG. 5, when the check valve 10 is changed to change the direction of the tiller, the fluid is provided to one side of the hydraulic cylinder 3 according to the change of the check valve 10, and at the same time, the fluid on the other side is again changed. It is introduced to the oil tank (5) side along the opening of the check valve (10).

Therefore, the head (2) of the tiller is forcibly rotated and steered by the drawing action of the hydraulic cylinder (3), and the aforementioned direction switching valve (20) is closed immediately before the opening of the check valve (10) and oil is Since the fluid does not flow into the direction switching valve 20, the fluid supplied from the check valve 10 is transferred to the hydraulic cylinder 3 without loss and is operated by operating the cylinder at high pressure while steering.

In addition, as shown in FIG. 6, when the opening direction of the check valve 10 is rotated differently so that the hydraulic cylinder 3 enters the inside, the tiller is steered to the other side as opposed to the above.

Therefore, in order to steer the tiller, the direction change valve 20 is operated and closed as described above, and then the check valve 10 is opened to thereby supply fluid to the hydraulic cylinder 3. Although each of these valves is opened and closed by a separate operating means, in the present invention, it is possible to sequentially open and close one operation means.

In addition, the double acting means of the present invention, as shown in Figure 7, the guide rod 36 is mounted horizontally on the lower portion of the operating plate 33, the guide rod 36, the return springs (37) (37) of both sides ') End portions are inserted, respectively, by rotating the operating plate 33 to one side as shown in Figure 8 by the return springs 37 (37') fixed to the other end of the spring (37 ') ) Is tensioned and the other end of the spring 37 is slid along the guide rod 36.

In addition, as shown in FIG. 9, the reverse return spring 37 is slid while the other return spring 37 ′ slides along the guide rod 36 as described above. Rotating the plate 33 returns itself to its place by the restoring force of the tensioned return springs 37 and 37 '.

The dual actuating means of the present invention having such a self-standing function is to open and close the sequential valve 20 and the check valve 10 sequentially and continuously only with one rotation, which will be described in more detail as follows.

As shown in FIG. 11, the dual actuating means 30 of the present invention is hinged and fixed to the upper end of the operation plate 33 having the guide groove 32 by a separate support 31. The upper part is a lever 35 having a handle 34 is coupled.

In addition, a protruding jaw 23 formed in the disc 24 of the direction switching valve 20 is inserted into the induction groove 32 of the operating plate 33, and a separate check valve 10 conversion lever 11 is inserted therein. The operating arm 15, which is hinged from (), has its long hole 14 hingedly fixed to the middle of the operating plate 33.

Therefore, the vertically positioned state of the operating plate 33 is a state in which the directional valve 20 is changed, that is, a state in which the hydraulic cylinder 3 can be freely mounted, and the operating plate 33 is moved by constant shaking. Since the clearance is generated by the long hole 14 formed in the operation arm 15 even when it flows, the check valve 10 does not operate, thereby preventing the hydraulic cylinder 3 from operating by malfunction.

The position of the dual operation means is a state in which the tiller runs linearly or does not use the direction changer of the tiller by its hydraulic pressure.

In this state, when the driver is required to steer the tiller to one side, as shown in FIG. 11, when the lever 35 of the dual actuating means 30 is pushed to one side, the operation plate 33 of the lower part rotates. As the operating plate 33 rotates, the protruding jaw 23 of the disc 24 inserted into the guide groove 32 of the operating plate 33 rotates by changing the position of the guide groove 32. Will be.

Therefore, the rotation of the disk 24 will occur, and the disk will rotate exactly 90 ° when the lever 35 is rotated more than a certain angle, and the disk 24 will rotate even after the operating plate 33 is further rotated thereafter. It will not be.

That is, the guide groove 32 formed in the operating plate 33 is formed in a "W" shape, so that the center portion of the disk 24 rotates, but at both ends, the protruding jaw ( Since the 23 and the guide groove 23 is in a horizontal state, the rotation of the disc 24 will not proceed.

Since the rotation of the disk 24 rotates the rotation shaft 25 of the direction switching valve 20, the changed direction switching valve 20 is in a state of being closed by the rotation of the disk 24.

Therefore, when the lever 35 is rotated at an angle, the direction switching valve 20 is closed. When the lever 35 is further rotated, the guide groove of the operating plate 33 is illustrated as shown in FIG. (32) pushes the operating arm (15) of the check valve (10) without rotation of the disc (24) of the directional valve (20) and by the operating arm (15) 11) to operate the check valve (10).

The operation of the check valve 10 is to provide a high-pressure fluid provided from the oil pump 4 to one side of the hydraulic cylinder (3) to operate the cylinder by the fluid pressure to make the steering of the tiller.

In addition, the fluid filled in the hydraulic cylinder 3 on the opposite side to which the hydraulic pressure is provided is discharged to the oil tank 5 side according to the fluid path of the check valve 10.

In addition, in order to steer the tiller to the other side as opposed to the operating direction described above, it is to rotate in the direction opposite to the operating direction of the lever 35 as shown in FIG.

In addition, when the operating plate 33 is rotated by rotating the lever 35 at an angle, the protruding jaw 23 of the disc 24 inserted into the guide groove 32 of the operating plate 33 is the guide groove 32. As the trajectory of the is to be rotated together, such rotation is to act to close the direction switching valve (20).

In addition, the closing time of the directional valve 20, that is, the time when the disk 24 is rotated 90 ° to become the end point of the end 14 of the long hole 14 of the operating arm 15 fixed to the operating plate 33 If the operating plate 33 is further rotated as shown in FIG. 14, the operating valve 15 is pulled from this time, and the conversion lever 11 of the check valve 10 is operated to change the check valve 10. will be.

Accordingly, even at this time, the high pressure fluid provided from the oil pump 4 is provided to the hydraulic cylinder 3 along the fluid path of the check valve 10 as described above. Will be.

Therefore, the driver can sequentially close and open the directional valve 20 and the check valve 10 by the operation of the lever 35, and the check valve 10 after the closed valve of the directional valve 20 There is no risk of safety accidents due to incorrect operation since no malfunction occurs.

After the steering by hydraulic pressure is removed, the operating plate 33 is returned to its original state by the return springs 37 and 37 'coupled to both sides of the operating plate 33 when the force that rotates the lever 35 is removed. As soon as the operating plate 33 is returned, the closing valve of the check valve 10 and the opening / closing of the direction change valve 20 are made. This is a straight line operation of the tiller.

In addition, when the operating plate 33 and the lever 35 are erected in the original state while the hydraulic cylinder 3 is drawn out or compressed by steering of the tiller, the check valve 10 is closed again and the directional valve 20 The disk 24 of () is reversed to change.

Therefore, from this time, the hydraulic cylinder 3 can be freely reciprocated, that is, the hydraulic cylinder 3 is in a state where no hydraulic pressure is applied to the hydraulic cylinder 3 so that the hydraulic cylinder 3 returns to the initial linear operation state again according to the traveling direction of the tiller. Will be.

Figure 15 is an enlarged perspective view of the present invention equipped with a cultivator steering device, the lever 35 of the dual actuating means 30 can be rotated before and after, so that the driver rotates the lever to the rear when boarding or getting off It is possible to secure a wide space for getting on and off, and connecting the upper end of the support 31 and the disc 24 by a separate spring 38, so that when the disc 24 rotates The restoring force further improves the rotational return force of the disk 24.

In addition, by inserting a separate roller 40 into the protruding jaw 23 of the disk 24, the protruding jaw 23 of the disk 24 is seen along the guide groove 32 of the operating plate 33 It was able to rotate smoothly.

The directional device of the cultivator using the hydraulic cylinder of the present invention as described above becomes very simple and simple, and the check valve is operated after the directional valve is operated with only one lever, as well as the amount of hydraulic pressure supplied by the check valve. By adjusting arbitrarily, the direction change by the hydraulic pressure is more accurate and simple, and the operation structure is improved, the maintenance and management are more convenient, and the malfunction and the operation deviation hardly occur.

Claims (3)

A hydraulic cylinder (3) is provided which connects the loading box (1) and the head (2) of the tiller to each other, and is equipped with an oil pump (4), an oil tank (5), and a check valve (10) for operating the hydraulic cylinder (3). In the conventional cultivator direction change device, the directional valve 20 is connected by a plurality of hydraulic pipes, The check valve 10 is connected with a conversion lever 11 and a plurality of fluid pipes 12, 12 ', 13, 13', and the fluid pipes 12, 12 ', 13, 13'. ) Are connected to the front and rear of the hydraulic cylinder (3) and the oil pump (4) and the oil tank (5), respectively, and the end of the operating arm (15) having a long hole (14) formed at the upper end of the conversion lever (11). Hinges, The directional valve 20 is formed with fluid pipes 21, 21 ', 22 connected to the front and rear sides of the oil tank 5 and the hydraulic cylinder 3, respectively, and the rotation shaft of the directional valve 20 ( 25 is equipped with a disk 24 having a protruding jaw 23 to open and close the fluid pipes 21 and 21 'by the rotation of the disk 24. The dual operation means 30 for operating the operation arm 15 of the check valve 10 and the disk 24 of the directional valve 20 in order to be installed separately, Dual actuating means 30 is rotatably mounted to the operating plate 33 having the guide groove 32 formed on the bottom by a vertically placed support 31, the handle 34 is formed on the upper portion of the operating plate 33 The lever 35 is mounted, and the lower side of the operating plate 33 is equipped with a guide rod 36 so that one side is inserted into the guide rod 36 and the other side has a fixed return spring 37 (37 '). Combine, The upper end of the disk 24 and the support 31, which were described above, is coalesced by a separate spring 38, and the protruding jaw 23 of the disk 24 is inserted into the guide groove 32 of the operating plate 33. And the long hole 14 of the operation arm 15 is slidably coupled to an intermediate portion of the operation plate 33, and the direction changer of the tiller using a hydraulic cylinder. The method according to claim 1, wherein the roller (40) is coupled to the protruding jaw (23) of the disk (24) so that the protruding jaw (23) of the disk (24) moves the guide groove (32) of the operating plate (33) more smoothly. Direction changer of the tiller using a hydraulic cylinder characterized in that. 2. The direction change of the tiller using a hydraulic cylinder according to claim 1, wherein the shape of the guide groove 32 of the operating plate 33 is configured in a "W" shape in which both ends are raised and the center is melted upward. Device.