KR970001942Y1 - Detecting apparatus of gravity center - Google Patents
Detecting apparatus of gravity center Download PDFInfo
- Publication number
- KR970001942Y1 KR970001942Y1 KR2019930030444U KR930030444U KR970001942Y1 KR 970001942 Y1 KR970001942 Y1 KR 970001942Y1 KR 2019930030444 U KR2019930030444 U KR 2019930030444U KR 930030444 U KR930030444 U KR 930030444U KR 970001942 Y1 KR970001942 Y1 KR 970001942Y1
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- KR
- South Korea
- Prior art keywords
- forklift
- guide
- center
- gravity
- hydraulic cylinder
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/12—Static balancing; Determining position of centre of gravity
- G01M1/122—Determining position of centre of gravity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
- G01G3/14—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing measuring variations of electrical resistance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/36—Vehicles designed to transport cargo, e.g. trucks
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
내용 없음.No content.
Description
제1도는 JIS D6001에 의거한 지게차의 무게중심 측정원리의 개요도.1 is a schematic diagram of the principle of center of gravity measurement of a forklift truck according to JIS D6001.
제2도는 본 고안의 평면도.2 is a plan view of the present invention.
제3도는 본 고안의 정면도이다.3 is a front view of the present invention.
＊도면의 주요부분에 대한 부호의 설명＊ Explanation of symbols for main parts of drawing
10 : 프론트 가이드(Front Guide) 11 : 리어 가이드(Rear Guide)10: Front Guide 11: Rear Guide
12,13 : 로드셀 박스 14,15 : 유압실린더12,13: load cell box 14,15: hydraulic cylinder
16,17 : 롤러 18 : 접이식 플레이트16,17: roller 18: folding plate
본 고안은 지게차의 제원에 따라 유입에 의하여 픽스쳐를 이동시켜 정확하고 손쉬원 방법으로 지게차의 무게중심을 측정하기 위한 것이다.The present invention is to measure the center of gravity of the forklift by the accurate and simple method by moving the fixture by the inflow according to the specifications of the forklift.
지게차는 크게 마스트(Mast)를 포함한 프론트 엔드(Front End)부, 동력부를 포함한 차체부분, 카운터웨이트(Counterweight)부로 구성되는데 각 단품 또는 조립체의 모양, 크기 또는 위치에 따라 무게중심을 측정, 조합한다는 것은 견적에 불과하며 최종적으로 제품상태의 지게차의 무게중심을 구하는 것이 의미가 있다.The forklift is composed of front end part including mast, body part including power part, and counterweight part, and the center of gravity is measured and combined according to the shape, size or position of each unit or assembly. It is only an estimate and it is meaningful to finally find the center of gravity of the forklift in the product state.
또한 크기가 작고 모양이 정형인 단품상태에서는 3점식 스케일링, 크레인 스케일링(Crane Scaling)으로 무게중심을 구할 수 있지만 지게차의 완성품 상태에서는 크레인으로 매달아 측정하기가 곤란할 뿐만 아니라 정확도도 현저히 떨어진다.In addition, the center of gravity can be obtained by three-point scaling and crane scaling in a single-sized, single-shape state, but in the finished state of the forklift, it is not only difficult to measure by hanging with a crane, but also the accuracy is remarkably reduced.
따라서 종래에는 로드셀을 이용하여 휠(wheel)별 하중을 측정, 환산하는 방법을 채택하여 많은 오차요인을 안고 측정해 오고 있으며 측정에 많은 맨 아워(Man-hour)가 요구되는 문제가 있었으며 또한 측정을 위해 차량을 경사시킬 때 시험차량의 전륜 또는 후륜에 크레인을 걸어 고임목을 괴고 놓으며 차량을 경사시켜야 하므로 많은 위험이 내재되는 문제가 있었다.Therefore, conventionally, a load cell is used to measure and convert loads for each wheel, and has been measured with a large number of error factors, and a lot of man-hours are required for measurement. When the vehicle is inclined, the crane hangs on the front wheel or the rear wheel of the test vehicle, and the vehicle is inclined, and the vehicle is inclined.
본 고안은 상기와 같은 제반 문제점을 해결하기 위하여 안출된 것으로, 로드셀이 설치된 픽스쳐를 지게차를 완성품 상태에서 정확하고, 신속하게 무게중심을 측정할 수 있도록 한 지게차의 무게중심 측정장치의 제공을 목적으로 한다.The present invention was devised to solve the above problems, and the object of the present invention is to provide a forklift center of gravity measuring device that can accurately and quickly measure the center of gravity of the forklift with the load cell installed in the finished state. do.
이하 본 고안을 첨부도면에 의하여 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
제1도는 JIS D6001에 의거한 지게차의 무게중심 측정원리를 도시하는 개요도인데, 무게중심을 구하는 공식은 다음과 같다.FIG. 1 is a schematic diagram showing the principle of measuring the center of gravity of a forklift truck based on JIS D6001. The formula for calculating the center of gravity is as follows.
L=L(G-Gf) / GL = L (G-Gf) / G
H=L(Gf'-Gf) + (Rf - Rr) Gf' tan θ/ G tan θ ]+RrH = L (Gf'-Gf) + (Rf-Rr) Gf 'tan θ / G tan θ] + Rr
여기서 H : 무게중심 높이(mm)Where H: Center of gravity height (mm)
L : 무게중심 위치에서 전차축 중심까지의 수평거리(mm)L: Horizontal distance from the center of gravity to the center of the front axle (mm)
L : 축간거리(mm)L: Interaxial Distance (mm)
Rf : 기준 무부하 상태에서의 전륜 유효반경(mm)Rf: Effective radius of front wheel under no load condition (mm)
Rr : 기준 무부하 상태에서의 후륜 유효반경(mm)Rr: Effective radius of rear wheel under no load condition (mm)
Gf : 수평시 전륜하중(kg)Gf: Front wheel load when horizontal (kg)
Gf' : 경사시 전륜하중(kg)Gf ': Front wheel load at inclination (kg)
θ : 지게차의 경사각도(°)θ: inclination angle of forklift (°)
G : 공차중량(kg)G: Tolerance weight (kg)
상기와 같은 공식으로 무게중심을 구하기 위하여 지게차의 전륜과 후륜의 밑에는 로드셀이 유압실린더와 롤러에 의하여 이동가능하도록 설치되어 있고, 지게차는 하부에 설치된 유압실린더에 의하여 로드셀에 놓여진 전륜 또는 후륜이 일정각도 경사질 수 있도록 되어있다.In order to obtain the center of gravity by the above formula, under the front wheel and the rear wheel of the forklift, the load cell is installed to be movable by the hydraulic cylinder and the roller, and the forklift is fixed to the front or rear wheel placed on the load cell by the hydraulic cylinder installed at the bottom. The angle can be tilted.
제 2도는 본 고안의 평면도이고, 제3도는 본 고안의 정면도이다.2 is a plan view of the subject innovation, and FIG. 3 is a front view of the subject innovation.
지게차의 전륜이 올라가는 로드셀 박스(12)는 프론트 가이드(10)의 상면에 롤러(16)를 매개로하여 좌우방향으로 이동가능하도록 설치되어 있고, 지게차의 후륜이 올라가는 로드셀 박스(13)는 리어가이드(11)의 상면에 롤러(17)를 매개로하여 좌우방향으로 이동가능하도록 설치되어 있다.The load cell box 12 in which the front wheels of the forklift are lifted is installed on the upper surface of the front guide 10 so as to be movable in the left and right directions through the roller 16. The load cell box 13 in which the rear wheels of the forklift lifts the rear guide The upper surface of 11 is provided so as to be movable in the left and right directions via the roller 17.
또한 상기 프론트 가이드(10)의 하부에는 상기 프론트 가이드(10)를 상하방향으로 이동시킬 수 있도록 유압실린더(14)가 설치되어 있고, 상기 리어 가이드(11)를 전후방향으로 이동시킬 수 있도록 상기 리어가이드(11)에는 유입실린더(15)가 설치되어 있다.In addition, the lower portion of the front guide 10 is provided with a hydraulic cylinder 14 to move the front guide 10 in the vertical direction, and the rear guide 11 to move the rear guide 11 in the front and rear direction The guide cylinder 11 is provided with an inflow cylinder 15.
또한 시험차량 진입을 용이하게 하기 위하여 리어 가이드(11)가 프론트 가이드(10)에서 이격되면서 접이식 플레이트(18)가 펼쳐지도록 되어있다.In addition, the rear guide 11 is spaced apart from the front guide 10 so as to facilitate entry of the test vehicle so that the folding plate 18 is unfolded.
초기에 본 측정장치는 P의 거리가 최소인 위치에 있고 프론트 가이드(10)와 리어 가이드(11)에는 각각 로드셀 박스(12)(13)를 올려놓고 차량제원에 의거 Q.R거리를 조정한다.Initially, the measuring device is located at a position where the distance of P is minimum, and load cell boxes 12 and 13 are placed on the front guide 10 and the rear guide 11, respectively, and the Q.R distance is adjusted according to the vehicle specifications.
시험차량을 후진으로 진입시키며 유압실린더(15)를 작동시켜 서서히 P의 거리를 크게하여 시험차량의 축간거리P를 미세조정으로 맞춘다.The test vehicle enters the reverse direction, and the hydraulic cylinder 15 is operated to gradually increase the distance of P to adjust the interaxial distance P of the test vehicle with fine adjustment.
시험차량이 픽스쳐에 안착되면 수평시 각 휠의 하중분포가 로드셀에 의하여 동시에 읽혀지고 이때 타이어의 유효반경도 측정된다. 수평시 하중분포가 읽혀지면 유압실린더(14)를 작동시켜 프론트 가이드 또는 리어 가이드를 상승시켜 시험차량의 각도와 각 휠의 하중분포를 측정한다. 이때에도 타이어의 유효반경을 측정한다.When the test vehicle is seated in the fixture, the load distribution of each wheel is read simultaneously by the load cell in horizontal and the effective radius of the tire is also measured. When the load distribution in the horizontal is read, the hydraulic cylinder 14 is operated to raise the front guide or the rear guide to measure the angle of the test vehicle and the load distribution of each wheel. At this time, the effective radius of the tire is measured.
이렇게하여 수평시 또는 경사시 각 휠의 하중분포 및 타이어의 유효반경, 차량축거 및 윤거를 기록하여 무게중심을 환산할 수 있으며 전륜기준 측정 및 후륜기준 측정을 실시하여 무게중심값의 일치 또는 오차를 쉽게 판별할 수 있다.In this way, it is possible to convert the center of gravity by recording the load distribution of each wheel, the effective radius of the tire, the wheelbase and the wheel of wheels in the horizontal or inclined direction. It can be easily determined.
한편 상기 유압실린더(15)는 시험차량을 프론트 가이드(10) 및 리어 가이드(11)에 정확히 울리면서 차량축 거리를 세팅하는데 작동하고, 상기 유압실린더(14)는 전륜 또는 후륜기준 무게중심 측정에 있어 경사시 하중분포 측정시 작동된다.Meanwhile, the hydraulic cylinder 15 operates to set the vehicle shaft distance while accurately ringing the test vehicle at the front guide 10 and the rear guide 11, and the hydraulic cylinder 14 is used to measure the center of gravity based on the front wheel or the rear wheel. It is operated when measuring load distribution when tilting.
또한 상기 유압실린더(14)(15)를 작동하기 위한 유압유니트와 유니트콘트롤러(미도시됨)는 별도로 설치되어 있다.In addition, the hydraulic unit and the unit controller (not shown) for operating the hydraulic cylinder (14, 15) is installed separately.
상술한 바와같이 본 고안에 의하면 크레인이나 고임목 등을 사용할 필요가 없이 전륜 또는 후륜을 기울여 무게중심을 측정할 수 있으므로 작업시 위험요소가 배제되고 작업시간을 줄일 수 있으며, 시험차량이 1대 뿐만아니라 제원이 다른 여러기종일 경우에는 빠른 시간내에 손쉽게 무게중심을 측정할 수 있고, 필요시 측정값의 시뮬레이션시에도 편리한 효과를 얻는다.As described above, according to the present invention, it is possible to measure the center of gravity by tilting the front wheel or the rear wheel without using a crane or stubble, so that the risk factor is eliminated during the operation, and the working time can be reduced. In the case of different models, the center of gravity can be easily measured in a short time and a convenient effect can be obtained even when simulating the measured value if necessary.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019930030444U KR970001942Y1 (en) | 1993-12-29 | 1993-12-29 | Detecting apparatus of gravity center |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019930030444U KR970001942Y1 (en) | 1993-12-29 | 1993-12-29 | Detecting apparatus of gravity center |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR950020329U KR950020329U (en) | 1995-07-26 |
| KR970001942Y1 true KR970001942Y1 (en) | 1997-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019930030444U KR970001942Y1 (en) | 1993-12-29 | 1993-12-29 | Detecting apparatus of gravity center |
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| Country | Link |
|---|---|
| KR (1) | KR970001942Y1 (en) |
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1993
- 1993-12-29 KR KR2019930030444U patent/KR970001942Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR950020329U (en) | 1995-07-26 |
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