KR20150029469A - plastic bush - Google Patents

plastic bush Download PDF

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Publication number
KR20150029469A
KR20150029469A KR20130108706A KR20130108706A KR20150029469A KR 20150029469 A KR20150029469 A KR 20150029469A KR 20130108706 A KR20130108706 A KR 20130108706A KR 20130108706 A KR20130108706 A KR 20130108706A KR 20150029469 A KR20150029469 A KR 20150029469A
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KR
South Korea
Prior art keywords
piece
bush
press
indentation
diameter
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KR20130108706A
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Korean (ko)
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KR101510466B1 (en
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허용훈
김영춘
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허용훈
김영춘
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Priority to KR20130108706A priority Critical patent/KR101510466B1/en
Publication of KR20150029469A publication Critical patent/KR20150029469A/en
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Publication of KR101510466B1 publication Critical patent/KR101510466B1/en

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    • 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
    • F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
    • F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
    • F16F13/26—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper characterised by adjusting or regulating devices responsive to exterior conditions
    • F16F13/28—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper characterised by adjusting or regulating devices responsive to exterior conditions specially adapted for units of the bushing type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00—Pivoted suspension arms; Accessories thereof
    • B60G7/04—Buffer means for limiting movement of arms
    • 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
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/38—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type
    • 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
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
    • F16F15/085—Use of both rubber and metal springs
    • 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
    • F16F2224/00—Materials; Material properties
    • F16F2224/02—Materials; Material properties solids
    • 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
    • F16F2234/00—Shape
    • F16F2234/02—Shape cylindrical

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Springs (AREA)

Abstract

The present invention relates to a bush installed on the sub frame or the suspension of a vehicle and used to support additional equipment. A plastic bush (10) according to the present invention comprises: a metal support unit (20); and a body (30) made from a hard synthetic resin, and coupled to cover the support unit (20). The body (30) is partitioned into a flange-type support body (31) and a cylindrical coupling part (32) through which the support unit (20) passes. The coupling part (32) has at least one of first indentation pieces (33a) and second indentation pieces (33b) shaped into wedges and arranged on top of each other on the outer wall thereof, wherein the first indentation piece (33a) has a diameter larger than the diameter of the second indentation piece (33b). A coupling piece (34) touching the second indentation piece (33b) can be elastic by having a hollow part (35) therein, and has a diameter equal to the diameter of the second indentation piece (33b) and smaller than the diameter of the first indentation piece (33a). The coupling piece (34) has a rounded part (R) on the outer circumferential surface of the front end thereof, and has a stepped part (35) on the rear side of the rounded part (R). According to the present invention, the bush is capable of securing durability remarkably, thereby reducing maintenance costs. In addition, the bush is capable of not only minimizing the generation of noise due to a contact slip or friction between the bush and a metal component in the vehicle, but also improving a counteracting force for a biased load generated in the bush, thereby preventing functional deterioration due to one-sided abrasion.

Description

플라스틱 부시{plastic bush}Plastic bush

본 발명은 플라스틱 부시에 관한 발명으로, 좀더 상세하게는 차량의 서브 프레임이나 서스펜션 등에 설치하여 부가 장치의 지지 등에 사용할 수 있도록 발명한 부시를 제공하기 위한 것이다.The present invention relates to a plastic bushing, and more particularly, to provide a bushing which is installed in a subframe or suspension of a vehicle, and which can be used for supporting an attachment device or the like.

차량의 서브 프레임이나 서스펜션 등의 부품에 설치하여 부가 장치의 지지 등에 사용되는 부시는 고무 부시가 이용되고 있으며, 경우에 따라서는 철제 파이프의 외벽에 고무를 입힌 하이브리드 타입의 부시가 사용되고 있다.BACKGROUND ART A rubber bush is used as a bush for use in a subframe of a vehicle or a suspension or the like for supporting an attachment device. In some cases, a hybrid type bush hermetically coated with an outer wall of a steel pipe is used.

차량의 서브 프레임이나 서스펜션 등과 같은 금속성 부품에 고무 부시를 결합하여 사용할 경우에는 작동과정에서 고무 부시와 차량 부품의 접촉성 미끌림에 의한 소음의 발생이 심하여 차량의 정숙성에 좋지 않은 영향을 미칠 뿐만 아니라 고무 부시의 내마모성이 심하여 유지보수의 측면에서도 바람직하지 못하다는 문제점이 있었으며, 그에 따라 고무 부시의 내구성을 향상시켜 주기 위한 방편으로 금속제 파이프의 외벽에 고무를 입힌 하이브리드 타입의 부시가 안출되었으나 이 또한 고무를 이용하므로 작동과정에서 소음을 발생시킨다는 문제점이 있었을 뿐만 아니라 내구성에 있어서도 사용자가 요구하는 수준까지 향상시키기는 어렵다는 등의 문제점이 지적되고 있다.When a rubber bush is used in combination with a metallic part such as a subframe or a suspension of a vehicle, noise is generated due to contact sliding between the rubber bush and the vehicle part during operation, which adversely affects the quietness of the vehicle. A bush of a hybrid type having rubber on the outer wall of the metal pipe was found as a means for improving the durability of the rubber bush, There is a problem that noise is generated in the operation process and it is difficult to improve the durability to the level required by the user.

또한, 서브 프레임이나 서스펜션 등과 같은 차량 부품에 결합되는 부시의 경우에는 특정한 방향에서 강한 하중이 발생하여 부시에 편마모를 일으켜 부시가 제기능을 발휘하지 못하게 되는 경우가 빈번하였다.In addition, in the case of a bush coupled to a vehicle component such as a subframe or a suspension, a strong load is generated in a specific direction, causing an uneven wear on the bush, so that the bush fails to exert its function frequently.

본 발명은 전술한 바와 같은 종래 부시의 제반 문제점을 일소하기 위해 창출한 것으로서, 접촉성 미끌림에 의한 소음의 발생을 최소화시킬 수 있도록 함과 아울러 내구성을 중진시켜 유지보수 비용을 절감할 수 있도록 하고, 편중 하중에 대한 대응력을 향상시켜 편마모 등을 방지하여 줄 수 있도록 함에 기술적 과제의 주안점을 두고 완성한 부시를 제공하고자 한다.The present invention has been made in order to solve all the problems of the conventional bush as described above, and it is an object of the present invention to minimize the occurrence of noise due to contact sliding, to improve the durability, The present invention provides a bush which has been completed with a focus on the technical problem in that it can improve the responsiveness to unbalanced load and prevent uneven wear.

상기한 기술적 과제를 실현하기 위한 본 발명은 금속 재질의 지지구와, 지지구를 감싸게끔 결합되는 경질 합성수지 재질의 몸체로 부시를 구성함에 있어서; 상기 몸체는 플랜지 형태의 지지체와 지지구가 통과하는 원통 형태의 결합부로 구획하고, 결합부의 외벽에 쐐기 형태의 제1 압입편과 제2 압입편을 적어도 하나 이상의 수량으로 층층이 형성하되 제1 압입편은 제2 압입편보다 큰 직경을 가지도록 구성하며, 제2 압입편과 접하는 결합편의 내측에는 중공부를 형성하여 결합편이 탄성을 가지도록 하되 결합편은 제2 압입편과 같은 직경을 가지면서 제1 압입편보다 작은 직경을 가지도록 구성하고, 상기 결합편의 선단부 외주면에 라운드처리된 곡부를 형성하며, 결합편의 곡부 후방에 단턱부를 형성하여 구성한 것을 기술적 특징으로 하는 것이다.In order to accomplish the above object, the present invention provides a bush comprising a support made of a metal and a body made of a hard synthetic resin to be coupled to the support, Wherein the body is divided into a flange-shaped support and a cylinder-shaped coupling portion through which the support is passed, and a wedge-shaped first press-fit piece and a second press-fit piece are formed in an outer wall of the coupling portion in at least one layer, And a hollow portion is formed on the inner side of the engaging piece in contact with the second press-fit piece so that the engaging piece has elasticity, while the engaging piece has a diameter equal to that of the second press- The tapered portion is formed on the outer peripheral surface of the front end portion of the engaging piece and the step portion is formed on the rear side of the tapered portion of the engaging piece.

본 발명에서 제시하는 플라스틱 부시는 차량 부품에 용이하게 고정시킬 수 있는 차별화된 구성을 가지는 것으로, 고무에 비교해 상당한 내구성을 확보할 수 있어 유지보수에 따른 비용절감효과를 얻을 수 있으며, 금속 소재로 된 차량 부품과의 접촉성 미끌림이나 마찰 등에 의한 소음의 발생을 최소화시킬 수 있을 뿐만 아니라 부시에 발생하는 편중 하중에 대한 대응력을 향상시켜 편마모에 따른 기능저하를 방지할 수 있는 등의 효과가 있다.The plastic bush disclosed in the present invention has a differentiated structure that can be easily fixed to vehicle parts, and can provide significant durability as compared with rubber, thereby achieving a cost-saving effect due to maintenance and repair. It is possible to minimize the occurrence of noise caused by sliding contact or friction with the vehicle parts and also to improve the responsiveness against the unbalanced load generated in the bushing, thereby preventing the function deterioration due to the uneven wear.

도 1은 본 발명에서 제시하는 부시의 실시예를 도시한 사시도.
도 2는 본 발명에서 제시하는 부시의 내부 구조를 도시한 단면도.
도 3은 본 발명에서 제시하는 부시의 다른 실시예를 도시한 사시도.
도 4는 본 발명의 사용상태도.BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a bushing according to the present invention; FIG.
2 is a cross-sectional view showing the internal structure of the bush shown in the present invention.
FIG. 3 is a perspective view showing another embodiment of the bush according to the present invention. FIG.
4 is a use state diagram of the present invention.

도 1에 본 발명에서 제시하는 부시(10)의 실시예가 도시되고 도 2에 부시(10)의 내부 구조를 도시한 단면도가 도시되는데, 도시된 바와 같이 본 발명은 어느 일단에 플랜지부(21)가 형성되고 상,하를 관통하는 중공의 통공(22)을 형성하여서 된 금속 재질의 지지구(20)와, 지지구(20)를 감싸게끔 결합되는 경질 합성수지 재질의 몸체(30)로 구성된다.FIG. 1 is a cross-sectional view illustrating an internal structure of a bushing 10 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view illustrating a bushing 10 according to an embodiment of the present invention. And a body 30 made of a hard synthetic resin which is coupled to surround the support 20 so as to surround the support 20. The support body 20 is made of a metal material having a through- .

상기 몸체(30)는 플랜지 형태의 지지체(31)와 지지구(20)가 통과하는 원통 형태의 결합부(32)로 구획하며, 결합부(32)의 외벽에 쐐기 형태의 제1 압입편(33a)과 제2 압입편(33b)을 적어도 하나 이상의 수량으로 층층이 형성하되, 제1 압입편(33a)은 제2 압입편(33b)보다 큰 직경을 가지도록 구성한다.The body 30 is divided into a flange-shaped support 31 and a cylindrical engagement portion 32 through which the support 20 passes. The wedge-shaped first press-fit piece 33a and the second press-fit piece 33b are formed in at least one layer in a number of layers, and the first press-fit piece 33a has a larger diameter than the second press-fit piece 33b.

상기 제2 압입편(33b)과 접하는 결합편(34)의 내측에는 중공부(35)를 형성하여 결합편(34)이 판의 형태로 되어 탄성을 가지도록 하되, 결합편(34)은 제2 압입편(33b)과 같은 직경을 가지면서 제1 압입편(33a)보다 작은 직경을 가지도록 구성한다.A hollow portion 35 is formed on the inner side of the engaging piece 34 that is in contact with the second press-fit piece 33b so that the engaging piece 34 is in the form of a plate to have elasticity, The second press-fit piece 33b has the same diameter as the first press-fit piece 33a and has a smaller diameter than the first press-fit piece 33a.

상기 결합편(34)의 선단부 외주면에 라운드처리된 곡부(R)를 형성하며, 결합편(34)의 곡부(R) 후방에 단턱부(35)를 형성하여 구성한다.The rounded portion R is formed on the outer circumferential surface of the front end of the engaging piece 34 and the step portion 35 is formed behind the concave portion R of the engaging piece 34. [

이상의 구성으로 된 본 발명은 차량의 서브 프레임이나 서스펜션 등과 같은 부품에 마련되는 통공에 결합하여 부가 장치의 지지 등에 사용하는 것으로, 부시(10)를 구성하는 몸체(30)의 결합편(34)을 차량 부품의 통공에 맞춘 상태에서 지지체(31) 부위를 강한 힘으로 눌러주면 몸체(30)가 차량 부품의 통공에 압입되는데, 이때, 결합편(34)이 탄성을 갖고 있을 뿐만 아니라 결합편(34)의 선단에 곡부(R)가 형성되어 있으므로 결합편(34)의 원할한 삽입이 이루어지고 강한 힘으로 푸싱되어 통공에 삽입되는 몸체(30)의 제1 압입편(33a)은 그 외주면이 통공의 내벽면에 강하게 압착되어 부시(10)와 차량 부품의 견고한 결합이 이루어지며, 통공을 통과한 결합편(34)에는 외부로 확개하려는 탄성이 발생하고 그에 따라 결합편(34)의 단턱부(35)가 차량 부품의 통공 외주면에 걸려지면서 부시(10)가 차량 부품에 고정되는 것이다.The present invention having the above-described structure is used for supporting an attachment device by being coupled to a through hole provided in a part such as a subframe or a suspension of a vehicle. The engagement piece 34 of the body 30 constituting the bush 10 The body 30 is pressed into the through hole of the vehicle component when the supporting body 31 is pressed against the through hole of the vehicle part with a strong force. At this time, the coupling piece 34 has elasticity, The first press-fitting piece 33a of the body 30, which is inserted into the through-hole by forceful insertion of the engaging piece 34 and is pressed with a strong force, So that the bush 10 and the vehicle part are firmly engaged with each other and the joint piece 34 that has passed through the through hole is elastically stretched to expand outwardly, 35) on the outer circumferential surface of the through-hole of the vehicle component As will be going bush (10) is fixed to the vehicle component.

본 발명은 경질 합성수지로 이루어진 몸체(30)가 차량 부품에 접촉하므로 고무 부시에 비해 상당한 내구성의 향상을 기대할 수 있으며, 접촉성 미끌림에 의한 소음의 발생을 최소화시켜 줄 수 있는 것이다.Since the body 30 made of a hard synthetic resin contacts the vehicle parts, the present invention can expect a considerable improvement in durability as compared with the rubber bush, and can minimize the occurrence of noise due to contact sliding.

도 3에 본 발명에서 제시하는 부시(10)의 다른 실시예가 도시되는데, 도시된 바와 같이 본 발명의 다른 실시예에 의하면, 부시(10)를 구성하는 몸체(30)의 결합부(32)에 하나 이상의 수직 요홈(36)을 형성하여 제1,2 압입편(33a,33b)과 결합편(34)이 수직 요홈(36)에 의해 분할되도록 구성할 수 있다.3 shows another embodiment of the bush 10 according to the present invention. As shown in FIG. 3, according to another embodiment of the present invention, One or more vertical grooves 36 may be formed so that the first and second press-fit pieces 33a and 33b and the engaging piece 34 are divided by the vertical grooves 36. [

상기와 구성할 경우 제1,2 압입편(33a,33b)과 결합편(34)에 탄성을 줄 수 있을 뿐만 아니라 부시(10)의 압입시에 제1,2 압입편(33a,33b)과 결합편(34)에 발생하는 변형성을 수용할 수 있는 공간을 확보하므로 부시(10)의 결합작업을 좀더 용이하게 실시할 수 있다.The first and second press-fitting pieces 33a and 33b and the engaging piece 34 can be resiliently attached to the first and second press-fitting pieces 33a and 33b when the bush 10 is press- Since the space for accommodating the deformability generated in the coupling piece 34 is secured, the coupling operation of the bush 10 can be performed more easily.

본 발명에 의하면, 부시(10)를 구성하는 몸체(30)의 결합부(32)의 중앙 또는 결합부(32)에 마련되는 수직 요홈(36)을 중심으로 한 양측이 경도를 달리하는 합성수지 재질로 이루어도록 구성할 수 있으며, 그와 같은 구성을 이중 사출장비를 이용하여 실시할 수 있다.According to the present invention, a synthetic resin material having a hardness on both sides with a vertical groove 36 provided at the center of the coupling portion 32 of the body 30 or the coupling portion 32 constituting the bush 10, , And such a structure can be implemented by using a double injection apparatus.

상기와 같이 구성할 경우 편중 하중이 예상되는 부분에 대한 경도 보강이 가능하여 편중 하중에 따른 편마모를 방지할 수 있는 것이다.If the structure is constructed as described above, it is possible to reinforce the hardness of a portion where a biased load is expected, thereby preventing uneven wear due to a biased load.

10: 부시 20: 지지구
21: 플랜지부 22: 통공
30: 몸체 31: 지지체
32: 결합부 33a: 제1 압입편
33b: 제2 압입편 34: 결합편
35: 중공부 36: 수직 요홈10: Bush 20: Earth
21: flange portion 22: through hole
30: body 31: support
32: engaging portion 33a: first press-
33b: second press-fitting piece 34:
35: hollow part 36: vertical groove

Claims (3)

어느 일단에 플랜지부(21)가 형성되고 상,하를 관통하는 중공의 통공(22)을 형성하여서 된 금속 재질의 지지구(20)와, 지지구(20)를 감싸게끔 결합되는 경질 합성수지 재질의 몸체(30)로 부시(10)를 구성함에 있어서;
상기 몸체(30)는 플랜지 형태의 지지체(31)와 지지구(20)가 통과하는 원통 형태의 결합부(32)로 구획하고, 결합부(32)의 외벽에 쐐기 형태의 제1 압입편(33a)과 제2 압입편(33b)을 적어도 하나 이상의 수량으로 층층이 형성하되 제1 압입편(33a)은 제2 압입편(33b)보다 큰 직경을 가지도록 구성하며, 제2 압입편(33b)과 접하는 결합편(34)의 내측에는 중공부(35)를 형성하여 결합편(34)이 탄성을 가지도록 하되 결합편(34)은 제2 압입편(33b)과 같은 직경을 가지면서 제1 압입편(33a)보다 작은 직경을 가지도록 구성하고, 상기 결합편(34)의 선단부 외주면에 라운드처리된 곡부(R)를 형성하며, 결합편(34)의 곡부(R) 후방에 단턱부(35)를 형성하여 구성한 것을 기술적 특징으로 하는 플라스틱 부시.
A metal support 20 having a flange portion 21 formed at one end thereof and having a hollow through hole 22 passing through the flange portion 21 and a rigid synthetic resin material The bush 10 is formed of a body 30 made of a metal.
The body 30 is divided into a flange-shaped support 31 and a cylindrical engagement portion 32 through which the support 20 passes. The wedge-shaped first press-fitting piece The first press-fit piece 33a and the second press-fit piece 33b are formed to have a larger diameter than the second press-fit piece 33b and the second press-fit piece 33b, A hollow portion 35 is formed on the inner side of the engaging piece 34 in contact with the first engaging piece 34 so that the engaging piece 34 is resilient such that the engaging piece 34 has the same diameter as the second press- The rounded portion R is formed on the outer peripheral surface of the distal end of the engaging piece 34 and the stepped portion R is formed on the rear side of the curved portion R of the engaging piece 34 35) are formed on the outer circumferential surface of the plastic bush.
제1항에 있어서;
상기 몸체(30)의 결합부(32)에 하나 이상의 수직 요홈(36)을 형성하여 제1,2 압입편(33a,33b)과 결합편(34)이 수직 요홈(36)에 의해 분할되도록 구성한 것을 기술적 특징으로 하는 플라스틱 부시.
The method of claim 1, further comprising:
One or more vertical grooves 36 are formed in the engaging portion 32 of the body 30 so that the first and second press-fitting pieces 33a and 33b and the engaging piece 34 are divided by the vertical grooves 36 A plastic bush with technical features.
제1항 또는 제2항에 있어서;
상기 몸체(30)는 결합부(32)의 중앙 또는 결합부(32)에 마련되는 수직 요홈(36)을 중심으로 한 양측이 경도를 달리하는 합성수지 재질로 이루어진 것을 기술적 특징으로 하는 플라스틱 부시.The method according to claim 1 or 2,
Wherein the body (30) is made of a synthetic resin material whose hardness is different on both sides of the vertical groove (36) provided at the center of the coupling part (32) or the coupling part (32).
KR20130108706A 2013-09-10 2013-09-10 plastic bush KR101510466B1 (en)

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KR101844444B1 (en) 2016-07-11 2018-04-04 린나이코리아 주식회사 Holder for Supporting Sensor
CN106141582B (en) * 2016-07-14 2018-03-13 洛阳诚创耐磨材料有限公司 A kind of preparation method of the grinding machine input and output material bushing of replaceable abrasion-proof lining body
KR101860828B1 (en) * 2017-04-20 2018-05-24 주식회사 대흥알앤티 Bushi for subframe of vehicle

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