KR0134258Y1 - Coil spring shaft - Google Patents
Coil spring shaft Download PDFInfo
- Publication number
- KR0134258Y1 KR0134258Y1 KR2019930024180U KR930024180U KR0134258Y1 KR 0134258 Y1 KR0134258 Y1 KR 0134258Y1 KR 2019930024180 U KR2019930024180 U KR 2019930024180U KR 930024180 U KR930024180 U KR 930024180U KR 0134258 Y1 KR0134258 Y1 KR 0134258Y1
- Authority
- KR
- South Korea
- Prior art keywords
- shaft
- yoke
- spring shaft
- nut
- spring
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/04—Wound springs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/40—Special vehicles
- B60Y2200/41—Construction vehicles, e.g. graders, excavators
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Springs (AREA)
Abstract
본 고안은 크롤라(Crawler)타입의 차량에 부속품인 충격흡수용 리코일(Recoil)스프링 샤프트에 관한 것으로 통상적인 크롤라 타입의 차량이 주행시에 돌출부 등에 부딪혔을 때 작용되는 충격력을 흡수하기 위하여 완충기능을 갖는 스프링이 압축후 팽창시에 인장력에 의한 충격으로 종래의 요우크를 지지하던 너트부를 파손하여 내구성이 저하됨을 방지하기 위하여 너트부의 구조를 개량하여 샤프트(10)와 일체로 단조가공된 머리부(11)를 형성하고 이에 완충패드를 장착하므로써 이에 요우크(13)가 지지되도록 하여 내구성을 향상시킨 것임.The present invention relates to a shock-absorbing recoil spring shaft, which is an accessory to a crawler type vehicle, and has a shock absorbing function to absorb the impact force that is applied when a conventional crawler type vehicle hits a protrusion or the like during driving. The head part is forged and integrally formed with the shaft 10 in order to prevent the durability of the nut from being damaged by damage to the nut part supporting the conventional yoke due to the impact of tensile force during expansion after compression. 11) to form a yoke (13) to support this by mounting a buffer pad to improve the durability.
Description
제1도는 본 고안의 정단면도.1 is a front cross-sectional view of the present invention.
제2도는 본 고안의 설치시 필요한 치구도.2 is a jig diagram required for installation of the present invention.
제3도는 종래 기술의 정단면도.3 is a front sectional view of the prior art.
제4도는 종래 기술의 결합나사부 상세도.4 is a detailed view of a coupling screw portion of the prior art.
제5도는 스프링 복원력에 의한 샤프트의 공칭응력 실험예.5 is a test example of the nominal stress of the shaft by the spring restoring force.
(a)는 시편의 규격 상태도이고,(a) is the standard state diagram of the specimen,
(b)는 시편의 하중 조건별 응력집중계수 관계 그래프.(b) is a relationship between stress concentration coefficients for load conditions of specimens.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
10 : 샤프트 11 : 머리부10 shaft 11 head
12 : 라운드부 13 : 요우크12: round part 13: yoke
14 : 본체 15 : 스프링14: body 15: spring
16 : 결합나사부 17 : 치구16: coupling screw part 17: jig
18 : 완충패드18: buffer pad
본 고안은 크롤라(Crawler)타입의 차량의 부속품인 충격흡수용 리코일(Recoil) 스프링 샤프트에 관한 것이다.The present invention relates to a shock absorbing recoil spring shaft which is an accessory of a crawler type vehicle.
통상적인 크롤라 타입의 차량에는 주행시에 돌출부등에 부딪혔을 때 작용되는 충격력을 흡수하기 위하여 충격흡수용 리코일 스프링이 설치되어 있다.A typical crawler type vehicle is provided with a shock absorbing recoil spring to absorb the impact force applied when it hits a protrusion or the like during driving.
종래의 리코일 스프링 샤프트는 첨부도면 제3도에 도시된 바와 같이 본체(24)와 나사부(26)에 의하여 연결된 샤프트(20)와; 상기 샤프트(20)에는 스프링(25)이 끼워 설치되고 끝단부에 요우크(23)가 끼워지고 이를 너트(21)로 고정하여 결착하였다.The conventional recoil spring shaft includes a shaft 20 connected by the main body 24 and the threaded portion 26, as shown in FIG. A spring 25 is fitted to the shaft 20, and a yoke 23 is fitted to the end of the shaft 20, and the yoke 23 is fixed by a nut 21.
이와 같은 종래의 구조에서는 차량이 주행중에 외부로 부터 돌출부에 의한 충격력이 가해질 경우 스프링(25)이 압축되면서 충격을 완화하게 되며, 돌출부가 제거되면 압축된 스프링(25)이 팽창되면서 생기는 인장력이 요우크(28)를 통하여 외측에 체결된 너트(21)에 작용하게 된다.In the conventional structure as described above, when the impact force by the protrusion is applied from the outside while the vehicle is running, the spring 25 is compressed to alleviate the impact, and when the protrusion is removed, the tension force generated by the expansion of the compressed spring 25 is required. The nut 28 acts on the nut 21 fastened to the outside.
이때의 인장력에 의한 충격이 원인이 되어 요우크(23)를 지지하는 너트(21)로 하중이 전달된 후 샤프트(20)의 나사부에 균열이 발생하여 파손되는 경우가 많았다.At this time, the impact caused by the tensile force caused a crack to occur in the screw portion of the shaft 20 after the load was transferred to the nut 21 supporting the yoke 23, which was often broken.
즉 제4도에 도시된 바와 같이 외부에서 작용하는 힘이 A부분의 첫번째 나사산에 대부분 작용되게 되므로 상기 A부분에서는 노치(Notch)효과에 의하여 높은 응력이 발생되어 파손되게 된다.That is, as shown in FIG. 4, since an external force acts mostly on the first thread of the portion A, high stress is generated in the portion A due to the notch effect, thereby causing damage.
실험결과 스프링의 복원력에 의한 최대 작용힘(F)이 30049kg f일 경우 샤프트에 걸리는 공칭응력(Norminal Stress)은 다음과 같다.As a result of the test, when the maximum working force (F) by spring restoring force is 30049kg f, the nominal stress applied to the shaft is as follows.
으로서 상기의 값은 재료의 인장응력 100 kg f/㎟에 비하면 매우 낮은 응력으로서 파손의 원인이 되지 않는다.This value is very low stress compared to 100 kg f / mm 2 of tensile stress of the material and does not cause breakage.
그러나 제5도와 같은 그래프를 이용하면 응력 집중계수를 구할 수 있다.However, the stress concentration coefficient can be obtained using the graph shown in FIG.
즉 응력 집중계수 K는 다음의 식을 이용하여 (b)의 그래프를 이용하여 구한다.That is, the stress concentration coefficient K is obtained by using the graph of (b) using the following equation.
상기의 값을 이용하여 (b)의 그래프에 적용시켜 K의 값을 찾으면 3 보다는 큰 값이지만 확실하지는 않다.Applying the above values to the graph in (b) to find the value of K, it is greater than 3, but it is not clear.
이 경우에 응력 집중계수가 6 이상이면 재료의 인장강도를 넘게되어 결국은 응력 집중계수에 의한 응력 집중현상이 샤프트 파손의 주요 원인이라고 할 수 있다.In this case, if the stress concentration coefficient is 6 or more, the tensile strength of the material is exceeded, and the stress concentration phenomenon due to the stress concentration coefficient is the main cause of the shaft breakage.
즉 상기의 원인에 의하여 샤프트가 파손되는 문제점을 해소하기 위하여 안출된 본 고안에서는 종래의 요우크를 지지하던 너트부의 구조를 개량한 충격흡수용 리코일(Recoil) 스프링 샤프트를 제공하는데 그 목적이 있다.That is, the present invention devised to solve the problem that the shaft is damaged by the above cause is to provide a shock absorbing recoil (spring) shaft for improving the structure of the nut portion supporting the conventional yoke.
상기의 목적을 달성하기 위하여 본 고안에서는 첨부 도면 제1도에 도시된 바와 같이 종래의 주요 파손부분이었던 너트부분을 샤프트(10)와 일체로 단조가공하여 머리부(11)를 형성하므로서 이에 요우크(13)가 지지되도록 하였다.In order to achieve the above object, in the present invention, as shown in FIG. 1, the yoke is formed by forging the nut part, which is the main breakage part of the related art, integrally with the shaft 10 to form the head portion 11. (13) was supported.
즉 본체(14)에 결합나사부(16)로 고정시킬 수 있는 샤프트(10)의 끝단에 라운드부(12)에 의해 형성된 머리부(11)에 완충패드를 장착한 후에 요우크(13)를 끼워 맞추고 스프링(15)을 끼워 조립한다.In other words, after mounting the shock absorbing pad to the head portion 11 formed by the round portion 12 at the end of the shaft 10 that can be fixed to the main body 14 by the coupling screw portion 16, the yoke 13 is inserted And fit the spring (15).
이와 같은 본 고안의 작용 및 효과를 살펴보면, 샤프트의(10)의 머리부(11) 내측 라운드부(12)의 곡률반경(R)을 24mm 정도로 형성할 경우 R / d = 24 / 48 = 0.5가 되므로 응력 집중게수(Stress Concentration Factor)를 1.2 정도로 유지할 수 있다.Looking at the operation and effects of the present invention, when the radius of curvature (R) of the inner round portion 12 of the head portion 11 of the shaft 10 is formed to about 24mm R / d = 24/48 = 0.5 Therefore, the stress concentration factor can be maintained at about 1.2.
따라서 스프링(15)의 압축 후 팽창에 의한 인장력이 요우크(13)에 가해질 경우 샤프트(10)와 일체로 형성된 머리부(11)에 의하여 충격력이 흡수되므로 충분히 기능을 수행하면서도 나사결착부를 제거하므로서 파손의 우려가 없다.Therefore, when the tensile force due to expansion after compression of the spring 15 is applied to the yoke 13, the impact force is absorbed by the head 11 formed integrally with the shaft 10, so that the screw fastening portion is removed while performing a sufficient function. There is no fear of damage.
그리고 완충패드에 의해 충격력이 줄어들게 하므로써 제1도 (16)부의 발생가능응력도 완화함으로써, 내구성을 향상시킬 수 있다.In addition, by reducing the impact force by the shock absorbing pad, the stresses that can be generated in FIG.
상기의 방법을 적용할 경우 샤프트(10)의 장착 방법은 먼저 본체(14)에 스프링(15)을 끼우고 요우크(13)를 끼운 다음에, 완충패드가 장착된 샤프트(10)를 본체(14)에 끼워 맞춘다. 이때에는 스프링(15)을 압축하면서 샤프트(10)를 장착해야 되기 때문에 정확한 동심도를 맞추기가 매우 어렵다.In the case of applying the above method, the mounting method of the shaft 10 is to first insert the spring 15 into the main body 14 and the yoke 13, and then the shaft 10 to which the shock absorbing pad is mounted. 14). At this time, it is very difficult to match the correct concentricity because the shaft 10 must be mounted while compressing the spring 15.
따라서 제2도에 도시된 바와 같이 샤프트(10)의 외경에 120°간격으로 치구(17)를 설치하면 손쉽게 동심도 조정이 가능하다.Therefore, as shown in FIG. 2, when the jig 17 is installed at an interval of 120 ° to the outer diameter of the shaft 10, concentricity can be easily adjusted.
이상 살펴본 바와 같이 본 고안에서는 차량의 주행시 돌출부에 크롤러가 부딪히면서 발생하는 충격력에 의하여 종래의 샤프트가 자주 파손되었던 문제점을 개선하므로써 내구성이 향상되며 이에따른 장비의 유지관리비를 절감할 수 있는 것으로써 매우 실용적이고 유용한 고안이다.As described above, in the present invention, the durability is improved by improving the problem that the conventional shaft is frequently damaged by the impact force generated when the crawler hits the protrusion during the driving of the vehicle, and thus the maintenance cost of the equipment is very practical. It is a useful design.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019930024180U KR0134258Y1 (en) | 1993-11-17 | 1993-11-17 | Coil spring shaft |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019930024180U KR0134258Y1 (en) | 1993-11-17 | 1993-11-17 | Coil spring shaft |
Publications (2)
Publication Number | Publication Date |
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KR950013714U KR950013714U (en) | 1995-06-16 |
KR0134258Y1 true KR0134258Y1 (en) | 1999-01-15 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR2019930024180U KR0134258Y1 (en) | 1993-11-17 | 1993-11-17 | Coil spring shaft |
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KR (1) | KR0134258Y1 (en) |
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1993
- 1993-11-17 KR KR2019930024180U patent/KR0134258Y1/en not_active IP Right Cessation
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KR950013714U (en) | 1995-06-16 |
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