KR20010017716A - Hydraulic crane having swing device of screw type - Google Patents

Hydraulic crane having swing device of screw type Download PDF

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Publication number
KR20010017716A
KR20010017716A KR1019990033378A KR19990033378A KR20010017716A KR 20010017716 A KR20010017716 A KR 20010017716A KR 1019990033378 A KR1019990033378 A KR 1019990033378A KR 19990033378 A KR19990033378 A KR 19990033378A KR 20010017716 A KR20010017716 A KR 20010017716A
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KR
South Korea
Prior art keywords
piston
crane
hydraulic
housing
oil
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KR1019990033378A
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Korean (ko)
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KR100315126B1 (en
Inventor
엄현식
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김태영
씨.에스기계 주식회사
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Priority to KR1019990033378A priority Critical patent/KR100315126B1/en
Publication of KR20010017716A publication Critical patent/KR20010017716A/en
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Publication of KR100315126B1 publication Critical patent/KR100315126B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/84—Slewing gear
    • B66C23/86—Slewing gear hydraulically actuated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • B66C23/42—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes with jibs of adjustable configuration, e.g. foldable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/03—Cranes with arms or jibs; Multiple cranes
    • B66C2700/0321—Travelling cranes
    • B66C2700/0357—Cranes on road or off-road vehicles, on trailers or towed vehicles; Cranes on wheels or crane-trucks
    • B66C2700/0364—Cranes on road or off-road vehicles, on trailers or towed vehicles; Cranes on wheels or crane-trucks with a slewing arm
    • B66C2700/0371—Cranes on road or off-road vehicles, on trailers or towed vehicles; Cranes on wheels or crane-trucks with a slewing arm on a turntable

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Abstract

PURPOSE: An oil hydraulic crane having a screw type oil hydraulic rotating device is provided to obtain the sufficient rotary angle of a column part with reducing the volume of a rotating element and to improve the durability of the parts by preventing self-bending. CONSTITUTION: An oil hydraulic crane formed with a crane base loaded in a vehicle, a column part installed in the vertical upper part of the crane base and rotatably installed by a rotating element, a boom assembly connected with the upper end part of the column part for being elastically operated, and a hook installed in the boom assembly for pulling up heavy articles, wherein the oil hydraulic crane includes a housing(610) having the rotating element installed in the upper part of the crane base and an oil entrance hole(612) for enabling oil to come in and out, a rotary shaft(620) received in the inside of the housing and interlocked with the lower end part of the column part, a piston(630) engaged with the outer peripheral surface of the rotary shaft and vertically slid by the oil pressure supplied into the inside of the housing, and a guide axial rod(640) coupled with both parts of the piston for guiding the vertical sliding of the piston.

Description

나사식 유압회전장치가 구비된 유압 크레인{HYDRAULIC CRANE HAVING SWING DEVICE OF SCREW TYPE}HYDRAULIC CRANE HAVING SWING DEVICE OF SCREW TYPE}

본 발명은 유압 크레인에 관한 것으로, 특히 차량에 탑재된 크레인 베이스에 선회가능하게 설치된 칼럼부의 회전을 나사식 회전수단에 의해서 이루어지도록 한 나사식 유압회전장치가 구비된 크레인에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic crane, and more particularly, to a crane having a screw hydraulic rotating device, which is configured to rotate by a screw rotating means a column portion rotatably installed on a crane base mounted on a vehicle.

일반적으로, 차량에 장착되는 유압 크레인은 관절식과 직진식의 종류가 있으며, 공히 엔진의 구동력을 PTO축을 통하여 인출하여 유압펌프를 구동하고 그 구동력으로 각종 동작부를 조작하는데 사용하도록 되어 있다.In general, the hydraulic crane mounted on the vehicle is of the articulated type and the straight type, and the driving force of the engine is pulled out through the PTO shaft to drive the hydraulic pump and to operate the various operating parts with the driving force.

이 차량 탑재용 유압식 크레인은 도 1에 도시된 바와 같이, 차량(10)에 탑재되고 양단부에 아우트 리거(12)를 구비하는 크레인 베이스(20)와, 크레인 베이스(20)의 상부 수직으로 회전수단에 의해서 회전가능하게 설치되는 칼럼(30)과, 칼럼(30)으로부터 상부로 경사지게 연장설치되어 상하 신축작동하는 붐(40)과, 붐(40)의 단부에 상,하 이동가능하게 설치되어 중량물을 인양하고 하적하기 위한 후크(50)로 대별된다.As shown in FIG. 1, the on-vehicle hydraulic crane includes a crane base 20 mounted on the vehicle 10 and having an outrigger 12 at both ends thereof, and an upper vertical rotation means of the crane base 20. Column 30 is rotatably installed by, the boom 40 is installed to be inclined upwardly from the column 30 to extend up and down, and is installed to be movable up and down at the end of the boom 40 is heavy And hook 50 for lifting and unloading.

그 회전수단은 붐(40) 및 칼럼(30)을 포함한 상부 선회체를 하부 몸체로부터 회전시키기 위한 것으로, 턴테이블을 이용하거나 랙＆피니언 기어방식을 이용하고 있다.The rotating means is for rotating the upper swinging body including the boom 40 and the column 30 from the lower body, using a turntable or using a rack & pinion gear system.

그중 직진식의 경우 주로 회전각도가 자유로운 턴테이블방식을 채용하고 있으며, 관절식의 경우는 회전각도가 제한되지만 작동속도가 빠른 랙＆피니언 기어방식을 주로 채용하고 있다.Among them, the straight type adopts the turntable method free of rotation angle. In the case of articulation, the rack and pinion gear method adopts the fast operating speed although the rotation angle is limited.

그외에도, 차량(10)의 상측에는 조종레버(62)가 설치된 조종석(60)이 탑재되고, 그 조종석(60) 하측의 크레인 베이스(20)는 유압모터, 오일탱크, 유압밸브 등의 각종 유압기구가 설치되고, 유압펌프의 구동력을 통해 유압이 전달된다.In addition, a cockpit 60 provided with a steering lever 62 is mounted on the upper side of the vehicle 10, and the crane base 20 below the cockpit 60 has various hydraulic pressures such as a hydraulic motor, an oil tank, and a hydraulic valve. A mechanism is installed and hydraulic pressure is transmitted through the driving force of the hydraulic pump.

한편, 랙＆피니언 기어방식의 회전수단은, 도 2에 도시된 바와 같이, 칼럼(30)의 단부에 연결되며 외주면에 나사산이 형성되어 있는 회전축(72)과, 그 회전축(72)의 외주면 양측에 각각 치차 결합되고 회전축(72)으로 회전력을 전달하기 위한 한쌍의 랙기어부(74)로 구성된다.Meanwhile, as shown in FIG. 2, the rack & pinion gear rotating means includes a rotating shaft 72 connected to an end of the column 30 and having a thread formed on an outer circumferential surface thereof, and both sides of the outer circumferential surface of the rotating shaft 72. It is composed of a pair of rack gears 74 for gear transmission and rotational force to the rotary shaft 72, respectively.

회전축(72)과 랙기어부(74)는 피니언＆랙기어 방식으로 결합되어 있으며, 랙기어부(74)의 직선 행정운동에 따라 피니언인 회전축(72)이 회전되고, 이어서 회전축(72)과 연결된 칼럼이 회전된다.The rotating shaft 72 and the rack gear portion 74 are coupled in a pinion & rack gear manner, and the rotating shaft 72 which is the pinion is rotated according to the linear stroke movement of the rack gear portion 74, and then the rotating shaft 72 and The connected column is rotated.

이러한 랙＆피니언 기어방식의 회전수단은 랙이 이동되는 행정길이에 따라 피니언인 회전축의 회전각도가 가변되어 회전되므로, 턴테이블방식에 비해 작동속도가 빠르지만 랙의 이동된 행정길이만큼 회전각도가 제한되는 단점을 갖는다.The rotation means of the rack & pinion gear system is rotated by varying the rotation angle of the pinion rotation shaft according to the stroke length of the rack, so that the operating speed is faster than the turntable method, but the rotation angle is limited by the travel stroke length of the rack. Has the disadvantage of being.

따라서, 회전각도를 증가시키기 위해 랙의 길이를 늘리면 전체적인 부피가 커지게 될 뿐만 아니라, 수직방향의 길이가 긴 랙기어가 장시간 반복 왕복 운동됨에 따라 랙기어부와 피니언기어인 회전축의 치차 결합부위에 그 왕복 운동에 대한 반력으로 자체 굽힘현상이 발생하게 되고, 이에 따라 랙기어의 내구성이 저하되는 문제점을 갖는다.Therefore, increasing the length of the rack to increase the rotation angle not only increases the overall volume but also increases the length of the rack in the gear coupling portion of the rack gear part and the pinion gear rotation shaft as the long vertical rack gear is repeatedly reciprocated. As a reaction force against the reciprocating motion, a self-bending phenomenon occurs, and thus the durability of the rack gear is deteriorated.

본 발명은 상기한 제반문제점을 해결하기 위한 것으로, 그 목적은 칼럼 및 붐조립체로 이루어진 상부 선회체의 회전속도를 만족시키면서 회전각도를 넓힐 수 있도록 한 나사식 유압회전장치가 구비된 유압 크레인을 제공하는 데 있다.The present invention is to solve the above-mentioned problems, the object is to provide a hydraulic crane with a screw-type hydraulic rotating device to increase the rotation angle while satisfying the rotational speed of the upper swing consisting of the column and the boom assembly There is.

도 1은 일반적인 차량 장착용 유압 크레인을 나타낸 도면,1 is a view showing a general vehicle mounting hydraulic crane,

도 2는 종래 크레인의 랙＆피니언 기어방식의 회전수단을 개략적으로 나타낸 평단면도,Figure 2 is a plan sectional view schematically showing a rotating means of the rack & pinion gear system of the conventional crane,

도 3은 본 발명의 실시예에 의한 나사식 유압회전장치가 구비된 유압 크레인을 나타낸 측면도,Figure 3 is a side view showing a hydraulic crane with a screw-type hydraulic rotary device according to an embodiment of the present invention,

도 4는 본 발명의 요부를 확대하여 나타낸 평면도,4 is an enlarged plan view showing the main part of the present invention;

도 5는 도 4의 A-A선 단면도,5 is a cross-sectional view taken along the line A-A of FIG.

〈 도면의 주요부분에 대한 부호의 설명 〉<Description of reference numerals for the main parts of the drawings>

100 : 차량 200 : 크레인 베이스100: vehicle 200: crane base

300 : 칼럼부 400 : 붐조립체300: column 400: boom assembly

500 : 후크 610 : 하우징500: hook 610: housing

612 : 오일출입공 620 : 회전축612: oil entrance hole 620: rotating shaft

630 : 피스톤 632 : 중공630: piston 632: hollow

634 : 나사부 640 : 가이드축봉634: threaded portion 640: guide shaft rod

700 : O링700 O ring

상기한 목적을 달성하기 위한 본 발명은 차량에 탑재된 크레인 베이스와, 그 크레인 베이스의 수직 상측으로 설치되고 회전수단에 의해서 회전 가능하게 설치되는 칼럼부와, 상기 칼럼부의 상단부에 연결되어 신축 동작되는 붐조립체 및 그 붐조립체에 설치되어 중량물을 인양하는 후크로 구성된 유압 크레인에 있어서,The present invention for achieving the above object is a crane base mounted on a vehicle, a column portion which is installed vertically above the crane base and rotatably installed by a rotating means, and is connected to the upper end of the column portion is stretchable operation In the hydraulic crane consisting of a boom assembly and a hook installed on the boom assembly to lift a heavy object,

상기 회전수단이 크레인 베이스의 상측에 설치되며 오일의 출입이 가능하도록 오일 출입공이 형성되는 하우징과,A housing in which the rotating means is installed at an upper side of the crane base and is formed with an oil access hole to allow oil to enter and exit;

상기 하우징의 내부에 수용되며 상기 칼럼부의 하단부에 결합되어 연동되는 회전축과,A rotating shaft accommodated in the housing and coupled to and coupled to a lower end of the column part;

상기 회전축의 외주면에 치차 결합되고 상기 하우징의 내부로 전달되는 유압에 의해서 상,하 슬라이딩 이동되는 피스톤과,A piston which is coupled to an outer circumferential surface of the rotary shaft and slidably moved up and down by hydraulic pressure transmitted to the inside of the housing;

상기 피스톤의 양측에 축 결합되어 상기 피스톤의 상,하 슬라이딩을 가이드하는 가이드축봉으로 구성된 것을 특징으로 한다.A shaft coupled to both sides of the piston is characterized in that consisting of a guide shaft rod for guiding the up and down sliding of the piston.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세히 설명하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

본 발명의 실시예에 의한 나사식 유압회전장치가 구비된 유압 크레인은, 도 3 내지 도 5를 참조, 차량(100)에 탑재되어 엔진의 구동력으로 동력원인 유압펌프를 구동시키는 동력 인출장치(미도시)등을 구비하는 크레인 베이스(200)와, 그 크레인 베이스(200)의 수직 상측으로 나사식 회전수단에 의해서 회전가능하게 설치되는 칼럼부(300)와, 그 칼럼부(300)의 상단에 연결되어 신축 동작가능하도록 설치되는 붐조립체(400)와, 붐조립체(400)에 연결되어 붐조립체(400)의 단부에 상,하 이동가능하도록 설치되어 중량물을 인양하기 위한 후크(500)로 이루어진다.Hydraulic crane equipped with a screw-type hydraulic rotary device according to an embodiment of the present invention, a power take-off device that is mounted on the vehicle 100, and drives the hydraulic pump as a power source by the driving force of the engine, referring to Figures 3 to 5 (not shown) Crane base 200 having a back light), a column portion 300 rotatably installed by a screw-rotating means vertically above the crane base 200, and an upper end of the column portion 300. It is connected to the boom assembly 400 is installed to be stretched and operable, and is connected to the boom assembly 400 is installed on the end of the boom assembly 400 to move up and down is made of a hook 500 for lifting a heavy object .

나사식 회전수단은 크레인 베이스(200)의 상측에 고정 설치되고 오일의 출입을 위해 오일출입공(612)이 형성되는 하우징(610)과, 하우징(610)의 중앙 내부에 관통되어 축 결합되고 상단부가 칼럼부(300)의 하단부에 스플라인 체결되며 외주면에 나사산이 형성되는 회전축(620)과, 회전축(620)이 중앙에 관통 축 결합되도록 중공(632)이 형성되며 그 중공(632)의 내주면에 회전축(620)의 나사산과 치차 결합되는 나사부(634)가 형성되고 하우징(610)의 내부에 전달되는 유압력에 의해서 상,하 슬라이딩 운동되는 피스톤(630)과, 그 피스톤(630)의 테두리측에 관통 결합되어 피스톤(630)의 수직 슬라이딩운동시 가이드하기 위한 복수의 가이드축봉(640)으로 이루어진다.Screw-type rotating means is fixed to the upper side of the crane base 200 and the housing 610, the oil entrance hole 612 is formed for entering and exiting the oil, and through the shaft inside the center of the housing 610 is coupled to the upper end Is splined to the lower end of the column portion 300 and the rotating shaft 620 is a thread formed on the outer peripheral surface, and the hollow shaft 632 is formed so that the rotating shaft 620 is coupled to the through shaft in the center and the inner peripheral surface of the hollow 632 A piston 630 which is gear-coupled with a screw thread of the rotating shaft 620 is formed and is slid up and down by a hydraulic force transmitted to the inside of the housing 610, and the rim side of the piston 630. It is coupled to the through consists of a plurality of guide shaft rods 640 for guiding during the vertical sliding movement of the piston 630.

그 피스톤(630)은 하우징(610)의 상,하측에 각각 형성된 오일 출입공(612)으로 공급되는 유압에 의해서 상,하로 슬라이딩 운동하는 데, 가이드축봉(640)은 양단이 하우징(610)의 상면과 하면에 고정 설치되어 있으므로 피스톤(630)의 상하 승강 동작시 피스톤(630)의 회전을 억제하는 기능을 갖는다.The piston 630 is slid up and down by the hydraulic pressure supplied to the oil inlet 612 formed on the upper and lower sides of the housing 610, the guide shaft bar 640 is both ends of the housing 610 Since it is fixed to the upper surface and the lower surface has a function of suppressing the rotation of the piston 630 during the vertical movement of the piston 630.

그리고, 피스톤(630)의 외주면과 하우징(610)의 내주면 사이에는 오일이 공급되는 하우징(610)의 내부 기밀을 유지하기 위한 복수의 O링(700)이 개재되어 있다.A plurality of O-rings 700 are provided between the outer circumferential surface of the piston 630 and the inner circumferential surface of the housing 610 to maintain an inner airtightness of the housing 610 to which oil is supplied.

회전축(620)의 나사산과 피스톤(630)의 나사부(634)는 나사의 마찰각보다 나사의 리드각이 크도록 형성하는 데, 이는 피스톤(630)의 직선 왕복운동을 회전축(620)의 회전 운동으로 변환시키도록 나사의 자립조건을 역으로 이용하기 위한 것이다.The thread of the rotary shaft 620 and the threaded portion 634 of the piston 630 are formed so that the lead angle of the screw is larger than the friction angle of the screw, which is a linear reciprocating motion of the piston 630 as the rotary motion of the rotary shaft 620. It is to use the independence condition of screw to convert.

이러한 구성을 갖는 본 발명의 유압 크레인은 일단의 오일출입공(612)을 통해서 오일이 하우징(610)의 내부로 공급되면 피스톤(630)의 일측면에 유압력이 전달되고, 이 유압력에 의해서 타단의 오일출입공(612)을 통해서 하우징(610) 내부의 오일이 외부로 배출되면서 피스톤(630)이 상측 또는 하측으로 슬라이딩 운동된다.In the hydraulic crane of the present invention having such a configuration, when oil is supplied into the housing 610 through one end of the oil entrance hole 612, hydraulic force is transmitted to one side of the piston 630, and by this hydraulic force As the oil in the housing 610 is discharged to the outside through the oil entrance hole 612 of the other end, the piston 630 is slid upward or downward.

그 슬라이딩 이동되는 피스톤(630)은 내주면에 형성된 나사부(634)가 회전축(620)의 외주면에 형성된 나사산과 마찰되면서 회전축(620)을 일방향으로 회전시키게 된다.The sliding piston 630 rotates the rotating shaft 620 in one direction while the threaded portion 634 formed on the inner circumferential surface rubs against the thread formed on the outer circumferential surface of the rotating shaft 620.

이때 피스톤(630)은 각 테두리가 가이드축봉(640)에 의해서 지지되어 있으므로, 회전이 억제된 상태에서 그 가이드축봉(640)의 외주면을 따라 수직으로 슬라이딩 이동된다.At this time, since the piston 630 is supported by each guide shaft rod 640, the piston 630 is slid vertically along the outer circumferential surface of the guide shaft rod 640 in a state in which rotation is suppressed.

즉, 피스톤(630)은 회전축(620)의 상단 또는 하단으로 이동하게 됨과 동시에, 그 피스톤(630)의 슬라이딩 이동력은 치차 결합된 회전축(620)에 회전력으로 작용하여 회전축(620)을 회전시키게 된다.That is, the piston 630 is moved to the top or bottom of the rotary shaft 620, the sliding movement force of the piston 630 acts as a rotational force to the rotary shaft 620 is geared to rotate the rotary shaft 620. do.

이어서, 회전축(620)이 피스톤(630)으로부터 회전력을 전달받아 회전되는 각도만큼 그 회전축(620)의 상단부에 스플라인 체결된 칼럼부(300)도 같이 연동되어 회전하게 되고, 작업자가 원하는 작업위치까지 회전된 다음에 붐조립체(400) 및 후크(500)를 작동시켜 중량물을 인양하는 작업을 수행하게 된다.Subsequently, the rotary shaft 620 is rotated by receiving the rotational force from the piston 630 and the column portion 300 splined to the upper end of the rotary shaft 620 also rotates as much as the angle of rotation. After being rotated, the boom assembly 400 and the hook 500 are operated to lift a heavy object.

한편, 붐조립체(400) 및 후크(500)의 작동이 완료된 다음에 칼럼부(300)를 다시 원위치로 복귀하기 위해서는 타단의 오일출입공(612)측으로 오일을 공급하여 피스톤(630)이 원래의 위치로 복귀하도록 한다. 이때의 피스톤(630) 및 회전축(620)은 앞서 설명한 작동과정의 역방향으로 이동되어 원위치로 복귀된다.On the other hand, after the operation of the boom assembly 400 and the hook 500 is completed, in order to return the column unit 300 to its original position, oil is supplied to the oil entrance hole 612 side of the other end so that the piston 630 is Return to position. At this time, the piston 630 and the rotating shaft 620 is moved in the reverse direction of the above-described operation process and returned to the original position.

이상과 같이 설명한 본 발명의 유압 크레인은 칼럼부가 차량에 탑재된 크레인 베이스로부터 나사식 회전수단에 의해서 회전 가능하도록 한 것인바, 이에 따르면 본 발명은 다음과 같은 효과를 갖는다.As described above, the hydraulic crane of the present invention is configured to be rotatable by a screw-type rotating means from a crane base mounted on a vehicle. The present invention has the following effects.

첫째, 칼럼부를 크레인 베이스로부터 회전시키기 위한 회전수단의 부피를 축소시키면서 칼럼부의 충분한 회전 각도를 얻을 수 있다.First, a sufficient rotation angle of the column portion can be obtained while reducing the volume of the rotating means for rotating the column portion from the crane base.

둘째, 각 부품 구성요소들이 나사식으로 작동되어 자체 굽힘현상을 방지함으로써, 부품의 내구성이 향상된다.Secondly, each component component is threaded to prevent its own bending, thereby improving component durability.

Claims (4)

차량(100)에 탑재된 크레인 베이스(200)와, 그 크레인 베이스(200)의 수직 상측으로 설치되고 회전수단에 의해서 회전 가능하게 설치되는 칼럼부(300)와, 상기 칼럼부(300)의 상단부에 연결되어 신축 동작되는 붐조립체(400) 및 그 붐조립체(400)에 설치되어 중량물을 인양하는 후크(500)로 구성된 유압 크레인에 있어서,A crane base 200 mounted on the vehicle 100, a column part 300 installed vertically above the crane base 200 and rotatably installed by a rotating means, and an upper end of the column part 300. In the hydraulic crane consisting of a hook 500 which is connected to the telescopic boom assembly 400 and installed in the boom assembly 400 to lift the heavy object, 상기 회전수단이 크레인 베이스(200)의 상측에 설치되며 오일의 출입이 가능하도록 오일 출입공(612)이 형성되는 하우징(610)과,A housing 610 in which the rotating means is installed on an upper side of the crane base 200, and an oil inlet 612 is formed to allow the oil to come in and out; 상기 하우징(610)의 내부에 수용되며 상기 칼럼부(300)의 하단부에 결합되어 연동되는 회전축(620)과,A rotating shaft 620 accommodated in the housing 610 and coupled to and coupled to a lower end of the column part 300; 상기 회전축(620)의 외주면에 치차 결합되고 상기 하우징(610)의 내부로 전달되는 유압에 의해서 상,하 슬라이딩 이동되는 피스톤(630)과,A piston 630 coupled to the outer circumferential surface of the rotation shaft 620 and slidably moved up and down by hydraulic pressure transmitted to the inside of the housing 610; 상기 피스톤(630)의 양측에 축 결합되어 상기 피스톤(630)의 상,하 슬라이딩을 가이드하는 가이드축봉(640)으로 구성된 것을 특징으로 하는, 나사식 유압회전장치가 구비된 유압 크레인.The shaft axially coupled to both sides of the piston (630), characterized in that consisting of a guide shaft rod (640) for guiding the up and down sliding of the piston (630), a hydraulic crane with a screw-type hydraulic rotating device. 제 1항에 있어서, 상기 피스톤(630)은 회전축(620)이 관통 결합되는 중공(632)을 가지며, 그 중공(632)의 내주면에 상기 회전축(620)의 외주면에 형성된 나사와 치차 결합되도록 사다리꼴형태의 나사부(634)가 형성된 것을 특징으로 하는, 나사식 유압회전장치가 구비된 유압 크레인.The method of claim 1, wherein the piston 630 has a hollow 632 through which the rotating shaft 620 is coupled through, trapezoidal so as to be geared with the screw formed on the outer peripheral surface of the rotating shaft 620 on the inner peripheral surface of the hollow 632. A hydraulic crane with a threaded hydraulic rotating device, characterized in that the threaded portion 634 of the form is formed. 제 1항에 있어서, 상기 피스톤(630)의 외주면과 하우징(610)의 내주면 사이에 기밀기능을 갖는 O링(700)이 개재된 것을 특징으로 하는, 나사식 유압회전장치가 구비된 유압 크레인.The hydraulic crane according to claim 1, wherein an O-ring (700) having an airtight function is interposed between the outer circumferential surface of the piston (630) and the inner circumferential surface of the housing (610). 제 1항 내지 제 3항중 어느 한 항에 있어서, 상기 회전축(620)은 상기 칼럼부(300)의 하단에 스플라인 체결된 것을 특징으로 하는 나사식 유압회전장치가 구비된 유압 크레인.The hydraulic crane according to any one of claims 1 to 3, wherein the rotary shaft (620) is splined to the lower end of the column portion (300).
KR1019990033378A 1999-08-13 1999-08-13 Hydraulic crane having swing device of screw type KR100315126B1 (en)

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CN105692466A (en) * 2016-03-28 2016-06-22 苏州市合叶精密机械有限公司 Novel rotatable crane

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