KR200161771Y1 - Boom of agricultural tractor - Google Patents
Boom of agricultural tractor Download PDFInfo
- Publication number
- KR200161771Y1 KR200161771Y1 KR2019960014949U KR19960014949U KR200161771Y1 KR 200161771 Y1 KR200161771 Y1 KR 200161771Y1 KR 2019960014949 U KR2019960014949 U KR 2019960014949U KR 19960014949 U KR19960014949 U KR 19960014949U KR 200161771 Y1 KR200161771 Y1 KR 200161771Y1
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- South Korea
- Prior art keywords
- boom
- worm
- excavator
- worm wheel
- tractor
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B63/00—Lifting or adjusting devices or arrangements for agricultural machines or implements
- A01B63/02—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors
- A01B63/06—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated mechanically by tractor motor
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B59/00—Devices specially adapted for connection between animals or tractors and agricultural machines or implements
- A01B59/06—Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines mounted on tractors
- A01B59/061—Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines mounted on tractors specially adapted for enabling connection or disconnection controlled from the driver's seat
- A01B59/062—Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines mounted on tractors specially adapted for enabling connection or disconnection controlled from the driver's seat the connection comprising a rigid interface frame on the tractor
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B63/00—Lifting or adjusting devices or arrangements for agricultural machines or implements
- A01B63/14—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements drawn by animals or tractors
- A01B63/24—Tools or tool-holders adjustable relatively to the frame
- A01B63/30—Tools or tool-holders adjustable relatively to the frame operated by motor power through a mechanical transmission
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B77/00—Machines for lifting and treating soil
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Zoology (AREA)
- Gear Transmission (AREA)
- Earth Drilling (AREA)
Abstract
본 고안은 트랙터에 굴삭장치를 부착하여 사용하는 트랙터용 굴삭기의 붐 회전장치에 관한 것이다.The present invention relates to a boom rotating device of the excavator excavator used by attaching the excavator to the tractor.
본 고안에 의한 붐 회전장치는, 모터와, 상기 모터에 의하여 회전하는 워엄과, 상기 워엄과 맞물려 감속회전하면서 중심부에 붐이 결합되는 결합공이 성형된 워엄휘일로 구성되어, 붐이 워엄휘일의 회전각과 동일한 회전각(360도)을 가질 수 있다. 그리고 상기 워엄의 치형부는, 원형의 워엄휘일의 치형곡선과 맞도록 오목한 치형곡선을 가진 치형부로 구성되어, 중량이 무거운 굴삭기 회전토오크에 충분히 견딜 수 있도록 설계된다.The boom rotating device according to the present invention is composed of a worm wheel formed of a motor, a worm rotating by the motor, and a worm wheel formed by engaging a boom coupled to a central portion while decelerating and rotating with the worm. It may have a rotation angle (360 degrees) equal to the rotation angle. In addition, the teeth of the worm are composed of teeth having a concave tooth curve to fit the tooth curve of the circular worm wheel, it is designed to withstand heavy rotary excavator torque.
Description
제1도는 트택터용 굴삭기를 보인 측면도.1 is a side view showing an excavator for a tractor.
제2도는 본 고안에 따라 붐과 연결되는 기어박스의 평면도.2 is a plan view of a gearbox connected to the boom according to the present invention.
제3도는 본 고안에 의한 워엄의 평면도.3 is a plan view of the worm according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 트랙터 2 : 프레임1: tractor 2: frame
3 : 전방프레임 4 : 제1붐3: front frame 4: first boom
5 : 제2붐 6 : 아암5: second boom 6: arm
12 : 모터 14 : 워엄12: motor 14: worm
16 : 워엄휘일 20 : 컨트롤러16: worm wheel 20: controller
본 고안은 트랙터용 굴삭기의 붐(Boom) 회전장치에 관한 것으로, 더욱 상세하게는 붐의 회전반경을 최대한 넓게 함으로써 굴삭기의 작업능률을 높일 수 있도록 구성되는 붐의 회전장치에 관한 것이다.The present invention relates to a boom rotating device of the tractor excavator, and more particularly to a rotating device of the boom configured to increase the working efficiency of the excavator by widening the rotation radius of the boom as much as possible.
먼저 트랙터용 굴삭기에 대하여 제1도를 참조하면서 간단하게 설명한다. 트택터용 굴삭기는, 농사에 다방면으로 이용되는 트랙터에 굴삭을 위한 굴삭용 바스켓을 붐과같이 부착하여 굴삭 작업에 이용할 수 있도록 한 것을 말한다.First, the tractor excavator will be described briefly with reference to FIG. A tractor for tractor refers to an excavating basket attached to a tractor used for farming, such as a boom, for use in excavation work.
제1도에 도시한 바와 같이, 트랙터(1)의 전방에 프레임(2)을 장착하고, 상기 프레임(2)을 이용하여 굴삭기를 장착하고 있다. 프레임(2)은, 굴삭기를 장착하기 위한 것으로, 통상 트랙터(1)의 전방3면(전면과 양측면)을 커버할 수 있도록 구성되어 트랙터(1)의 본체에 고정된다. 이렇게 고정된 상태에서 상기 프레임(2)의 전면에는 굴삭기의 제1붐(Boom)(4)의 장착을 위한 전방프레임(3)이 상기 프레임(2)에 고정된다.As shown in FIG. 1, the frame 2 is mounted in front of the tractor 1, and the excavator is mounted using the said frame 2. As shown in FIG. The frame 2 is for mounting an excavator, and is generally configured to cover the front three surfaces (front and side surfaces) of the tractor 1, and is fixed to the main body of the tractor 1. In this fixed state, the front frame 3 for mounting the first boom 4 of the excavator is fixed to the frame 2 on the front of the frame 2.
상기와 같은 프레임(2)은, 제조회사에 따라 형상과 고정방법에 약간의 차이는 있지만, 트랙터(1)에 굴삭기를 고정하기 위하여 통상 사용하고 있는 것이다.The frame 2 as described above is usually used to fix the excavator to the tractor 1, although the shape and the fixing method vary slightly depending on the manufacturer.
전방프레임(3)[또는 제조회사에 따라 상기 프레임(2)에 직접 제1붐(4)을 장착하는것도 있다]에 제1붐(4)을 회전가능하게 장착하며, 상기 제1붐(4)에는 제2붐(5)이 회동가능하게 결합되어 있으며, 상기 제2붐(5)에는, 굴삭용 바스켓(7)이 단부에 회동가능하게 부착된 아암(6)이 연결된다.The first boom 4 is rotatably mounted on the front frame 3 (or some manufacturers directly mount the first boom 4 to the frame 2), and the first boom 4 The second boom 5 is rotatably coupled to), and the second boom 5 is connected to an arm 6 having an excavating basket 7 rotatably attached to an end thereof.
상기 제1붐(4)은 전방프레임(3)에 회전가능하게 장착되어 있고, 제2붐(5)은 제1유압실린더(22)에 의하여 상하방향으로 이동가능하고, 아암(6)은 제2유압실린더(12)에 의하여 같은 평면상에서 회동가능하다. 그리고, 굴삭작업을 위한 바스켓(7)은, 제3유압실린더(13)에 의하여 동평면상에서 회동가능하여 굴삭작업을 수행할 수 있도록 되어 있다.The first boom 4 is rotatably mounted to the front frame 3, the second boom 5 is movable in the vertical direction by the first hydraulic cylinder 22, the arm 6 is made of The two hydraulic cylinders 12 can be rotated on the same plane. The basket 7 for the excavating work is rotatable on the coplanar surface by the third hydraulic cylinder 13 so that the excavating work can be performed.
이와 같이, 상기 제2붐(5) 및 아암(6)은, 제1붐(4)에 의하여 회전방향이 결정된 상태의 평면상을 회동할 수 있도록 되어 있어서, 실질적으로 트택터의 작동자가 제1붐(4)을 회전시키는 것에 의하여 작업할 장소를 선택하고, 이러한 선택에 따라 제2붐(5) 및 아암(6)이 일정한 절곡운동을 하면서 굴삭작업이 진행된다. 즉, 트랙터용 굴삭기에서 작업 위치 선정을 위한 방향은 상기 제1붐(4)의 회전에 의하여 정해지는 것이다.In this way, the second boom 5 and the arm 6 are capable of rotating on a plane in a state in which the rotation direction is determined by the first boom 4, so that the operator of the contactor is substantially the first. The place to work is selected by rotating the boom 4, and according to this selection, an excavation operation advances, with the 2nd boom 5 and the arm 6 making a constant bending motion. That is, the direction for selecting the working position in the tractor excavator is determined by the rotation of the first boom (4).
이러한 제1붐(4)의 회전을 제어하기 위한 기계적인 구성요소로써, 현재까지는 제1붐과 연결되는 유압실린더를 사용하고 있었다. 이러한 유압실린더는, 상술한 제1유압실린더(11), 제2유압실린더(12), 제3유압실린더(13)와 유사한 구조의 것으로써, 이러한 유압실린더를 이용하는 경우, 유압에 의하여 왕복이동하는 피스톤의 행정에 의하여 제1붐의 회전반경이 결정된다.As a mechanical component for controlling the rotation of the first boom 4, to date, a hydraulic cylinder connected to the first boom has been used. The hydraulic cylinder has a structure similar to that of the first hydraulic cylinder 11, the second hydraulic cylinder 12, and the third hydraulic cylinder 13 described above, and when such a hydraulic cylinder is used, the hydraulic cylinder is reciprocated by hydraulic pressure. The rotation radius of the first boom is determined by the stroke of the piston.
따라서 유압실린더의 용량에 의한 피스톤의 행정은 당연히 일정한 길이를 가질수 밖에 없는 것으로, 이러한 피스톤의 행정에 따라 제1붐의 회전반경도 작아져서, 제한되지 않을 수 없는 단점이 있다. 현실적으로 보면, 상기와 같은 유압실린더에 의하여 회전하는 붐은 회전반경이 120도 정도이거나 그 이하이어서, 이러한 회전반경을 벗어나는 것에 대해서는 트랙터 자체의 방향을 바꾸어서 작업하지 않으면 안되는 번거로움이 있었다.Therefore, the stroke of the piston by the capacity of the hydraulic cylinder of course has a certain length, the rotation radius of the first boom according to the stroke of such a piston, there is a disadvantage that can not be limited. In reality, the boom that is rotated by the hydraulic cylinder as described above has a radius of rotation of about 120 degrees or less, there is a hassle of having to work by changing the direction of the tractor itself for moving out of this radius of rotation.
본 발명은 이와 같은 문제점을 개량하기 위한 것으로, 제1붐의 회전반경을 임의로 조정할 수 있는 트랙터용 굴삭기의 붐 회전장치를 제공하는 것을 목적으로 한다.The present invention has been made to improve the above problems, and an object of the present invention is to provide a boom rotating device for an excavator excavator that can arbitrarily adjust the rotation radius of the first boom.
이와 같은 목적을 달성하기 위한 본 고안에 의한 붐 회전장치는, 모터와, 상기 모터에 의하여 회전하는 워엄과, 상기 워엄과 맞물려 감속회전하면서 중심부에 붐이 결합되는 결합공이 성형된 워엄휘일로 구성되어, 붐이 워엄휘일의 회전각과 동일한 회전각(360도)을 가질 수 있다. 그리고 상기 워엄의 치형부는, 원형의 워엄휘일의 치형곡선과 맞도록 오목한 치형곡선을 가진 치형부로 구성되어, 중량이 무거운 굴삭기의 회전토오크에 충분히 견딜 수 있도록 설계된다.The boom rotating device according to the present invention for achieving the above object is composed of a worm wheel formed of a motor, a worm that is rotated by the motor, and a coupling hole that is coupled to the center of the boom while decelerating and rotating in engagement with the worm. The boom may have the same rotation angle (360 degrees) as the rotation angle of the worm wheel. And the tooth of the worm is composed of a tooth having a concave tooth curve to match the tooth curve of the circular worm wheel, it is designed to withstand the rotational torque of the heavy heavy excavator.
다음에는 도면의 실시예에 기초하면서 본 발명을 더욱 상세하게 설명하기로 한다.Next, the present invention will be described in more detail with reference to the embodiments of the drawings.
제2도에 도시한 바와 같이, 본 고안에 의한 붐 회전장치는, 모터(12)와 상기 모터(12)와 맞물려 회전하는 워엄(14)과, 상기 워엄과 맞물려 감속회전하고 중심부에 제1붐이 축결합되는 워엄휘일(16)을 포함하여 구성된다.As shown in FIG. 2, the boom rotating device according to the present invention includes a worm 14 that rotates in engagement with a motor 12 and the motor 12, and a first boom in the center of the boom that rotates in deceleration. It is configured to include the worm wheel 16 is axially coupled.
컨트롤러(20)는, 트랙터용 굴삭기의 작동자의 조작신호에 의하여 모터(12)를 제어 한다. 상기 컨트롤러(20)에서 인가되는 신호에 따라 회전하는 워엄(14)이 회전하게 되고, 상기 워엄(14)의 회전은 그 치형과 맞물린 워엄휘일(16)에 전달되어, 워엄휘일(16)은 원하는 속도로 감속되어 회전할 수 있는 상태가 된다. 실질적으로 상기 컨트롤러(20)는, 워엄(14)의 회전의 시작 및 정지, 그리고 회전방향에 대한 제어를 행하게 될 것이다.The controller 20 controls the motor 12 according to the operation signal of the operator of the tractor excavator. The worm 14 rotating according to the signal applied from the controller 20 is rotated, the rotation of the worm 14 is transmitted to the worm wheel 16 engaged with the teeth, the worm wheel 16 Is decelerated at a desired speed and is ready to rotate. Substantially, the controller 20 will control the start and stop of the rotation of the worm 14 and the direction of rotation.
상기 워엄(l4)의 회전에 따라 감속회전하는 워엄휘일(l6)은, 그 중심에 굴삭기의 제1붐을 결합하기 위한 결합공(18)을 구비하고 있다. 본 명세서에서 상기 결합공(l8)은, 굴삭기의 제1붐을 고정하기 위한 결합공을 보이고 있는 것이지만, 실질적으로는 상기 제1붐이 결합된 상태에서는 제1붐을 보이는 것이어서 이하에서는 상기 결합공에 고정된 제1붐을 도면부호 18로 설명하기로 한다.The worm wheel 1 6 which decelerates and rotates in response to the rotation of the worm 14 is provided with a coupling hole 18 for engaging the first boom of the excavator at the center thereof. In the present specification, the coupling hole 18 is showing a coupling hole for fixing the first boom of the excavator, but the coupling hole is substantially the first boom in a state where the first boom is coupled, so that the coupling hole will be described below. The first boom fixed to the reference numeral 18 will be described.
이와 같이 구성되는 본 고안에 의한 트랙터용 굴삭기는, 모터(12)에 의하여 회전하는 워엄(14)가 회전하면서, 워엄과 맞물린 워엄은 일정하게 감속되어 회전을 하게 된다. 그리고 워엄휘일(16)의 회전에 의하여, 워엄휘일의 중심부에 축고정된 제1붐(18)도 같이 회전하면서, 제1붐과 연결되는 제2붐 및 아암이 원하는 장업장소를 찾아서 회전할 수 있게 되는 것이다. 회전반경에 대하여 살펴보면, 워엄(14)의 회전방향을 제어하는 컨트롤러(20)의 신호에 의하여 워엄(14)은 어떠한 방향으로 든지 회전이 가능하다. 따라서 실질적으로 이와 같은 본 고안에 의한 회전장치에 의하면 붐은 360도 회전이 가능하다고 볼수 있다. 그러나 본 고안에 따른 트랙터용 굴삭기는 상술한 바와 같이 트랙터의 전방에 장착되어 사용되는 것으로 후방으로는 회전할 필요가 없거니와 만일 회전하게 되면 굴삭기의 붐등이 트랙터의 자체에 부딪혀 손상을 초래할 수도 있다.In the tractor excavator according to the present invention configured as described above, while the worm 14 rotating by the motor 12 rotates, the worm engaged with the worm is decelerated to rotate constantly. Then, by rotating the worm wheel 16, the first boom 18, which is axially fixed to the center of the worm wheel, also rotates, while the second boom and the arm connected to the first boom find and rotate the desired place. You can do it. Looking at the rotation radius, by the signal of the controller 20 for controlling the rotation direction of the worm 14, the worm 14 can be rotated in any direction. Therefore, according to the rotary device according to the present invention, it can be seen that the boom can rotate 360 degrees. However, the tractor excavator according to the present invention is mounted on the front of the tractor as described above, and does not need to be rotated backwards, and if rotated, the boom of the excavator may hit the tractor itself and cause damage.
이러한 회전반경의 조절은, 사용자가 사용하면서 조절할 수도 있을 것이고, 미리 임의의 회전각도를, 들면 180도 정도로 설정하여 놓고 그 이상으로의 회전은 불가능하도록 컨트롤러(20)을 조정하는 방법도 있을 것이다.The adjustment of the rotation radius may be adjusted while the user is using it, and there may be a method of adjusting the controller 20 to set an arbitrary rotation angle in advance, for example, about 180 degrees, and to prevent rotation beyond that.
다음에는 본 고안의 워엄의 구조에 대하여 제3도를 참조하여 더욱 상세하게 설명한다.Next, the structure of the worm of the present invention will be described in more detail with reference to FIG.
본 고안의 워엄(14)은, 제3도에 도시한 바와 같이, 워엄휘일과 맞물리도록 설계되어 있는 워엄(14)의 치형부(14a)를, 워엄휘일(16)의 치형과 더욱 접촉면을 많게 하도록 하기 위하여, 워엄휘일의 치형곡선에 맞는 오목한 원호상으로 성형하고 있다.As shown in FIG. 3, the worm 14 of the present invention has a tooth 14a of the worm 14 which is designed to be engaged with the worm wheel, and has a contact surface with the tooth of the worm wheel 16. In order to increase the number, it is molded into a concave arc shape conforming to the tooth curve of the worm wheel.
즉 치형부(14a)의 치형곡선을, 원형의 워엄휘일(16)의 치형곡선에 더욱 잘 맞물리도록 오목한 원호상으로 성형한다. 중심부의 치형의 이(齒)의 높이가 가장 낮고 가장자리부분으로 갈수로 이(齒)의 높이가 높아지도록 치형을 가공하고 있다. 이러한 치형부(14a)는, 원형의 워엄휘일(16)과 맞물릴 경우, 워엄휘일(16)의 잇수와 더욱 많은 부분에서 맞물리게 되거나, 동일한 잇수와 맞물린다고 하더라도 맞물리는 접촉면이 더욱 넓어지게 되기 때문에 더욱 큰 토오크의 전달이 가능하게 된다.That is, the tooth curve of the toothed portion 14a is shaped into a concave arc shape so as to better mesh with the tooth curve of the circular worm wheel 16. The tooth is processed so that the height of the tooth of the tooth in the center is the lowest and the height of the tooth increases as it goes to the edge. When the teeth 14a are engaged with the circular worm wheels 16, the teeth 14a are engaged with the number of teeth of the worm wheels 16 in a larger number, or even when the teeth 14 are engaged with the same number of teeth, the engaging surfaces become wider. As a result, a larger torque can be transmitted.
이러한 점은, 본 고안에 의한 굴삭기가 금속재의 제1붐, 제2붐, 아암 그리고 바스켓등을 포함하는 중량물이어서, 이를 회전시키기 위해서는 큰 토오크가 필요하고 이러한 토오크를 안전하게 견딜 수 있도록 하기 위한 것이다.This is because the excavator according to the present invention is a heavy object including a metal first boom, a second boom, an arm, a basket, and the like, so that a large torque is required to rotate it, so that it can safely withstand such torque.
이상과 같이 구성되는 본 고안에 의한 트랙터용 굴삭기는, 상술한 바와 같이, 굴삭기의 회전반경이 실질적으로 360도 까지 가능하기 때문에 사용자의 의도대로 충분하게 조절할 수 있는 잇점이 있다. 또한 워엄휘일의 회전각이, 워엄휘일의 잇수의 회전에 따라 정해지는 것이어서, 정확한 각위치의 선정이 가능한 잇점이 있다.As described above, the tractor excavator according to the present invention configured as described above has an advantage of being able to be sufficiently adjusted according to the intention of the user because the rotation radius of the excavator can be substantially up to 360 degrees. In addition, since the rotation angle of the worm wheel is determined by the rotation of the number of teeth of the worm wheel, there is an advantage that an accurate angle position can be selected.
이러한 본 고안의 잇점, 정확한 각위치의 선정이 가능함과 동시에 회전반경을 임의의 크기로 조절할 수 있는 본 고안의 구성에 의하여, 굴삭작업의 효율성올 높이면서, 동시에 사용자가 작업하기 편리한 작업환경을 제공할 수 있게 된다.The advantages of the present invention, by selecting the exact angle position and at the same time by the configuration of the present invention that can adjust the rotation radius to any size, while increasing the efficiency of the excavation work, at the same time provide a convenient working environment for the user You can do it.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019960014949U KR200161771Y1 (en) | 1996-06-05 | 1996-06-05 | Boom of agricultural tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019960014949U KR200161771Y1 (en) | 1996-06-05 | 1996-06-05 | Boom of agricultural tractor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR980000006U KR980000006U (en) | 1998-03-30 |
| KR200161771Y1 true KR200161771Y1 (en) | 1999-12-01 |
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ID=19457994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019960014949U Expired - Fee Related KR200161771Y1 (en) | 1996-06-05 | 1996-06-05 | Boom of agricultural tractor |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR200161771Y1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020021449A (en) * | 2000-09-15 | 2002-03-21 | 김인기 | A farming machines car |
| CN104499517A (en) * | 2010-10-11 | 2015-04-08 | 大虎株式会社 | Tractor Installed Rotatable Arm |
-
1996
- 1996-06-05 KR KR2019960014949U patent/KR200161771Y1/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020021449A (en) * | 2000-09-15 | 2002-03-21 | 김인기 | A farming machines car |
| CN104499517A (en) * | 2010-10-11 | 2015-04-08 | 大虎株式会社 | Tractor Installed Rotatable Arm |
| CN104499517B (en) * | 2010-10-11 | 2017-01-11 | 大虎株式会社 | Tractor Installed Rotatable Arm |
Also Published As
| Publication number | Publication date |
|---|---|
| KR980000006U (en) | 1998-03-30 |
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