JPH04105218U - Synthetic resin thrust bearing - Google Patents
Synthetic resin thrust bearingInfo
- Publication number
- JPH04105218U JPH04105218U JP1991013683U JP1368391U JPH04105218U JP H04105218 U JPH04105218 U JP H04105218U JP 1991013683 U JP1991013683 U JP 1991013683U JP 1368391 U JP1368391 U JP 1368391U JP H04105218 U JPH04105218 U JP H04105218U
- Authority
- JP
- Japan
- Prior art keywords
- annular
- synthetic resin
- annular recess
- protrusion
- lower case
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920003002 synthetic resin Polymers 0.000 title claims abstract description 78
- 239000000057 synthetic resin Substances 0.000 title claims abstract description 78
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 230000002093 peripheral effect Effects 0.000 claims abstract description 21
- 238000003780 insertion Methods 0.000 claims description 40
- 230000037431 insertion Effects 0.000 claims description 40
- 239000000428 dust Substances 0.000 abstract description 25
- 230000000593 degrading effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 12
- 229930182556 Polyacetal Natural products 0.000 description 8
- 229920006324 polyoxymethylene Polymers 0.000 description 8
- 239000000725 suspension Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- -1 polybutylene terephthalate Polymers 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/74—Sealings of sliding-contact bearings
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
- F16C17/18—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with floating brasses or brushing, rotatable at a reduced speed
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
- F16C2208/20—Thermoplastic resins
- F16C2208/60—Polyamides [PA]
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
- F16C2208/20—Thermoplastic resins
- F16C2208/66—Acetals, e.g. polyoxymethylene [POM]
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
- F16C2208/20—Thermoplastic resins
- F16C2208/70—Polyesters, e.g. polyethylene-terephthlate [PET], polybutylene-terephthlate [PBT]
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
- F16C2208/20—Thermoplastic resins
- F16C2208/76—Polyolefins, e.g. polyproylene [PP]
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
- F16C2208/20—Thermoplastic resins
- F16C2208/76—Polyolefins, e.g. polyproylene [PP]
- F16C2208/78—Polyethylene [PE], e.g. ultra-high molecular weight polyethylene [UHMWPE]
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2326/00—Articles relating to transporting
- F16C2326/01—Parts of vehicles in general
- F16C2326/05—Vehicle suspensions, e.g. bearings, pivots or connecting rods used therein
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/20—Sliding surface consisting mainly of plastics
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Fluid-Damping Devices (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
(57)【要約】 （修正有）
【目的】 軸受の摺動面への塵埃等の侵入を防止し、軸
受の摺動特性を低下させることなく円滑な操向機能を長
期間維持できる合成樹脂製スラスト軸受を提供する。
【構成】 下部ケースＢは、円板状の基体部２１と基体
部上面に環状突出部２３，環状係合突出部２８，環状凹
部２４，２６と，基体部外周面に係合部２７とを備え
る。上部ケースＣは，円板状の基体部４１と，基体部下
面に環状垂下部４２，環状係合垂下部４９，内環状リッ
プ部４４，外環状リップ部４６と，内周面に係合部４８
とを備える。上下部ケースは夫々の外周面係合部相互間
で弾着係合し，かつ，相対回転可能に組合わされてお
り，また外環状凹部４５と環状凹部との間にはリング状
合成樹脂製軸受片Ｄが収容され，内環状凹部４３と環状
突出部端面との環状隙間７０には密封リング６０が装着
されている。
(57) [Summary] (with amendments) [Purpose] A synthetic resin that prevents dust from entering the sliding surface of the bearing and maintains smooth steering function for a long period of time without degrading the sliding characteristics of the bearing. We provide manufactured thrust bearings. [Structure] The lower case B includes a disc-shaped base portion 21, an annular protrusion 23, an annular engagement protrusion 28, annular recesses 24 and 26 on the upper surface of the base, and an engagement portion 27 on the outer peripheral surface of the base. Be prepared. The upper case C includes a disc-shaped base portion 41, an annular hanging portion 42 on the lower surface of the base, an annular engaging hanging portion 49, an inner annular lip portion 44, an outer annular lip portion 46, and an engaging portion on the inner peripheral surface. 48
Equipped with. The upper and lower cases are combined so that their respective outer peripheral surface engaging portions are elastically engaged and relatively rotatable, and a ring-shaped synthetic resin bearing is provided between the outer annular recess 45 and the annular recess. The piece D is accommodated, and a sealing ring 60 is installed in the annular gap 70 between the inner annular recess 43 and the end face of the annular protrusion.
Description
【０００１】0001
本考案は合成樹脂スラスト軸受に関し、更に詳しくは四輪自動車におけるスト ラット型サスペンション（マクファーソ式）に組込まれて好適な合成樹脂スラス ト軸受に関する。 This invention relates to synthetic resin thrust bearings, and more specifically to thrust bearings in four-wheeled vehicles. Synthetic resin slis suitable for being incorporated into rat-type suspension (MacPherson type) Regarding bearings.
【０００２】0002
一般に四輪自動車の前輪に用いられるストラット型サスペンションは、主軸と 一体となった外筒の中に油圧式ショックアブソーバを内蔵したストラットアッセ ンブリにコイルバネを組合わせた構造である。上記サスぺンションには、ステア リング操作によりストラットアッセンブリがコイルバネと共に回るさい、アッセ ンブリのピストンロッドが回る形式と、ピストンロッドが回らない形式のものが あるが、いずれの形式においてもストラットアッセンブリの回動を円滑に許容す るべく車体の取付部材とコイルバネの上部バネ座シートとの間に軸受が用いられ る。そして、従来よりこの箇所の軸受にはボールを使用したコロガリ軸受あるい は合成樹脂製すべり軸受が使用されている。 Strut-type suspensions, which are generally used for the front wheels of four-wheeled vehicles, are A strut assembly with a hydraulic shock absorber built into the integrated outer cylinder. It has a structure that combines a spring with a coil spring. The above suspension has a steering wheel. When the strut assembly rotates with the coil spring by ring operation, the assembly There are two types of assembly: one in which the piston rod rotates, and one in which the piston rod does not rotate. However, in either type, it is necessary to allow the strut assembly to rotate smoothly. If possible, a bearing is used between the mounting member on the vehicle body and the upper spring seat of the coil spring. Ru. Traditionally, bearings at this location have been either rolling bearings using balls or A synthetic resin sliding bearing is used.
【０００３】 しかるに、従来使用されている合成樹脂製すべり軸受には摺動面への塵埃等の 侵入防止を目的としてゴム弾性体から成るダストシールが相対回転する摺動面間 に密に摺接させて配されているため、ステアリング操作時にはダストシールが摺 動面間に直接関与してその摺動摩擦力を高め、操舵力を増大させるという欠点が ある。0003 However, conventionally used synthetic resin sliding bearings are susceptible to dust and other particles on the sliding surfaces. Between sliding surfaces where a dust seal made of rubber elastic material rotates relative to each other to prevent intrusion. Since the dust seal is placed in close sliding contact with the The disadvantage is that it is directly involved between the moving surfaces, increasing the sliding friction force and increasing the steering force. be.
【０００４】 そこで、本出願人は上述した欠点を解消するべく先に、実願平１ー１６１７１ 号（実開平２ー１０７８２３号：以下「従来技術」という）において、ゴム弾性 体から成るダストシールを使用することなく摺動面への塵埃等の侵入を防止し、 ステアリング操作時の操舵力の増大を防止できる合成樹脂スラスト軸受を提案し た。0004 Therefore, in order to eliminate the above-mentioned drawbacks, the present applicant first proposed Utility Application No. 1-16171. No. 2-107823 (hereinafter referred to as "prior art"), rubber elasticity Prevents dust from entering the sliding surface without using a dust seal consisting of a body, We have proposed a synthetic resin thrust bearing that can prevent an increase in steering force during steering operation. Ta.
【０００５】 以下、この従来技術を図６及び図７に基づいて説明する。[0005] This conventional technique will be explained below based on FIGS. 6 and 7.
【０００６】 図６及び図７の合成樹脂スラスト軸受Ａにおいて、合成樹脂製下部ケースＢは 内面に挿通孔１を有する円板状の基体部２と基体部２の上面に挿通孔１に対して 径方向外方に環状段部３をもって基体部２の上面から突出し基体部２に連なる環 状突出部４と突出部４に対して径方向外方に環状溝５を形成して突出する内環状 突条部６と突条部６と環状凹溝７を形成して基体部２の上面から突出する外環状 突条部８と突条部８と共に環状溝９を形成しかつ基体部２の外周縁に形成された 環状係合突出部１０と基体部２の下面に挿通孔１を挟んで相対向して形成された 凸部２ａとを備えている。[0006] In the synthetic resin thrust bearing A shown in Figs. 6 and 7, the synthetic resin lower case B is A disk-shaped base portion 2 having an insertion hole 1 on the inner surface and a hole 1 on the upper surface of the base portion 2. A ring that protrudes from the upper surface of the base body 2 and is connected to the base body 2 with an annular stepped portion 3 radially outward. An annular groove 5 is formed radially outward with respect to the protrusion 4 and the protrusion 4 is protruded. An outer annular shape that projects from the upper surface of the base portion 2 by forming a protrusion 6 and an annular groove 7. An annular groove 9 is formed together with the protrusion 8 and the protrusion 8 and is formed on the outer peripheral edge of the base body 2. An annular engagement protrusion 10 and a lower surface of the base body 2 are formed opposite to each other with the insertion hole 1 in between. It is provided with a convex portion 2a.
【０００７】 合成樹脂製上部ケースＣは中央部に挿通孔１と同径の挿通孔１１を有する円板 状の基体部１２と基体部１２の下面に挿通孔１１と連通する環状垂下部１３と環 状垂下部１３に対して径方向外方に環状溝１４を形成して垂下する内環状垂下部 １５と垂下部１５に対して径方向外方に環状凹溝１６を形成して垂下する外環状 垂下部１７と垂下部１７に対して径方向外方に環状溝１８を形成しかつ基体部１ ２外周縁に形成された環状係合垂下部１９とを備えている。[0007] The synthetic resin upper case C is a circular plate having an insertion hole 11 with the same diameter as the insertion hole 1 in the center. A shaped base portion 12 and an annular hanging portion 13 communicating with the insertion hole 11 on the lower surface of the base portion 12. An inner annular hanging part that forms an annular groove 14 radially outward with respect to the hanging part 13 and hangs down. 15 and an outer annular groove that hangs down by forming an annular groove 16 radially outward with respect to the hanging portion 15. An annular groove 18 is formed radially outward with respect to the hanging portion 17 and the base portion 1. 2 and an annular engaging hanging portion 19 formed on the outer peripheral edge.
【０００８】 上部ケースＣは環状係合垂下部１９を下部ケース部Ｂの環状係合突出部１０外 周面に弾性装着させ、内及び外環状垂下部１５及び１７を下部ケースＢの環状溝 ５及び９に夫々係合させ、環状垂下部１３を下部ケースＢの環状段部３に係合さ せて下部ケースＢと相対回転可能に組合わされている。この組合わされた上部及 び下部ケースＣ及びＢにおける弾性装着部及び夫々の係合部には、ラビリンス作 用による密封部が形成されている。[0008] The upper case C connects the annular engagement hanging part 19 to the outside of the annular engagement protrusion 10 of the lower case part B. The inner and outer annular hanging parts 15 and 17 are elastically attached to the circumferential surface of the lower case B. 5 and 9, respectively, and the annular hanging portion 13 is engaged with the annular stepped portion 3 of the lower case B. In addition, it is combined with the lower case B such that it can rotate relative to the lower case B. This combined upper and The elastic mounting parts and the respective engaging parts in the lower cases C and B have labyrinth features. A seal is formed for this purpose.
【０００９】 上部及び下部ケースＣ及びＢ内には合成樹脂製軸受片Ｄが端面を夫々環状凹溝 ７及び１６の底面に夫々摺接させて配されており、上部及び下部ケースＣ及びＢ と軸受片Ｄとで合成樹脂スラスト軸受Ａが構成されている。[0009] Inside the upper and lower cases C and B, synthetic resin bearing pieces D have annular grooves on their end faces, respectively. The upper and lower cases C and B are placed in sliding contact with the bottom surfaces of the upper and lower cases C and B, respectively. and the bearing piece D constitute a synthetic resin thrust bearing A.
【００１０】 合成樹脂スラスト軸受Ａは図７に示すように、下部ケースＢの基体部２の挿通 孔１と上部ケースＣの円板状の基体部１２の挿通孔１１とをストラットアッセン ブリのピストンロッドＲの外周面に両者間に軸受隙間（クリアランス）を保持さ せて挿通し、下部ケースＢの基体部２下面を上部バネ座シートＳの平面部Ｓ１に 当接させると共にに基体部２下面の凸部２ａをバネ座シートＳの平面部Ｓ１に設 けられた嵌合孔Ｓ２に嵌合させ、上部ケースＣの基体部１２上面を車体側取付部 材Ｆに当接せしめて配置されている。なお、図中符号Ｅはコイルバネ、Ｇはバネ 座シートＳの下面にピストンロッドＲ外周面を囲繞して配されたバンプストッパ ー（ラバー）である。0010 As shown in Fig. 7, the synthetic resin thrust bearing A is inserted into the base portion 2 of the lower case B. The hole 1 and the insertion hole 11 of the disc-shaped base portion 12 of the upper case C are strut-assembled. A bearing gap (clearance) is maintained between the two on the outer circumferential surface of the piston rod R. and insert the lower surface of the base part 2 of the lower case B onto the flat part S1 of the upper spring seat sheet S. At the same time, the convex portion 2a on the lower surface of the base portion 2 is provided on the flat surface S1 of the spring seat sheet S. The upper surface of the base part 12 of the upper case C is fitted into the cut-out fitting hole S2, and the upper surface of the base part 12 of the upper case C is attached to the mounting part on the vehicle body side. It is placed in contact with the material F. In addition, the symbol E in the figure is a coil spring, and G is a spring. A bump stopper is placed on the lower surface of the seat S, surrounding the outer peripheral surface of the piston rod R. - (rubber).
【００１１】 上述した従来技術からなる合成樹脂スラスト軸受は従来の合成樹脂スラスト軸 受の欠点、即ち軸受摺動面への塵埃等の侵入防止を目的として摺動面間に、当該 摺動面を囲繞して装着されたゴム弾性体からなるダストシールに起因するステア リング操舵力の増大という欠点を解消することができ、また摺動面への塵埃等の 侵入を極力防止して安定したかつ円滑なステアリング操舵力を得ることができる ものである。[0011] The synthetic resin thrust bearing made of the conventional technology described above is similar to the conventional synthetic resin thrust shaft. In order to prevent the intrusion of dust, etc. into the sliding surface of the bearing, there is a problem with the bearing. Steer caused by a dust seal made of rubber elastic material surrounding the sliding surface This eliminates the drawback of increased ring steering force, and also reduces the amount of dust, etc. on the sliding surface. It is possible to prevent intrusion as much as possible and obtain stable and smooth steering force. It is something.
【００１２】 しかしながら、ストラット型サスペンションは車輌走行中に塵埃、泥水などが 直接作用する部位に装着されるため、ストラット型サスペンションに組込まれる スラスト軸受の使用環境は極めて過酷なものとなる。0012 However, strut type suspensions are susceptible to dust, muddy water, etc. while the vehicle is running. Built into strut-type suspension because it is attached to the area that will be directly affected. The environment in which thrust bearings are used is extremely harsh.
【００１３】 上述した従来技術から成る合成樹脂スラスト軸受にはその内外周面側に夫々ラ ビリンス作用による密封部が形成され、この密封部によって軸受摺動面への塵埃 等の侵入を防止しているが、上述した環境条件下での使用では、特に軸受の内径 面側から塵埃等の侵入が生じることが、その後の実験により確認された。[0013] The synthetic resin thrust bearing made of the conventional technology described above has lugs on its inner and outer circumferential surfaces, respectively. A seal is formed by the bilrinsing action, and this seal prevents dust from entering the bearing sliding surface. However, when used under the above-mentioned environmental conditions, the inner diameter of the bearing Subsequent experiments confirmed that dust and other particles entered from the surface side.
【００１４】 この軸受内径面側から摺動面に塵埃等が侵入する原因については詳らかではな いが、ストラット型サスペンションにおいて、合成樹脂スラスト軸受が組込まれ る上部バネ座シートの下面側にピストンロッドを囲繞して配されたバンプストッ パーが車輌走行中にストラット本体と当接して弾性変化し、バンプストッパーの 弾性変形がポンプ作用をなし、この作用によって塵埃等がピストンロッドと軸受 内径面との間の摺動隙間（クリアランス）から軸受内径面側に圧送されるものと 推察される。[0014] The cause of dust entering the sliding surface from the inner diameter side of the bearing is not clear. However, in strut type suspensions, synthetic resin thrust bearings are incorporated. A bump stop is placed around the piston rod on the underside of the upper spring seat seat. While the vehicle is running, the bumper comes into contact with the strut body and changes elasticity, causing the bump stopper to Elastic deformation acts as a pump, and this action removes dust from the piston rod and bearings. The material is pressure-fed to the bearing inner surface through the sliding gap (clearance) between the bearing and the inner diameter surface. It is inferred.
【００１５】 本考案は上述した従来技術の改良に係るもので、軸受の内外周面から摺動面へ の塵埃等の侵入を防止し、塵埃等の侵入に起因する軸受の摺動特性を低下させる ことなくステアリング操作時の円滑な操舵力を長期間にわたって維持できる合成 樹脂スラスト軸受を得ることを目的とするものである。[0015] The present invention is an improvement on the above-mentioned conventional technology. prevents the intrusion of dust, etc., and reduces the sliding characteristics of the bearing due to the intrusion of dust, etc. Synthesis that allows smooth steering force to be maintained over a long period of time without any friction. The purpose is to obtain a resin thrust bearing.
【００１６】[0016]
上述した目的を達成するべく本考案によれば、合成樹脂製下部ケースと合成樹 脂製上部ケースと上部及び下部ケース間に配される合成樹脂製軸受片とから成る 合成樹脂スラスト軸受において、下部ケースは、中央部に第一の挿通孔を有する 円板状の第一の基体部と、第一の挿通孔に対して径方向外方に環状段部を介して 配されて第一の基体部の上面に突設された環状突出部と、外周面に係合部をもち 第一の基体部外周面に連なって第一の基体部の上面に突設された環状係合突出部 と、この環状係合突出部と環状突出部との間であって第一の基体部の上面に形成 された環状凹部とを備えており、上部ケースは、中央部に第二の挿通孔を有する 円板状の第二の基体部と、第二の挿通孔に連設されて第二の基体部の下面から垂 下して先端が下部ケースの環状段部に対向した環状垂下部と、この環状垂下部に 対して径方向外方に幅狭の内環状凹部を形成して第二の基体部の下面から垂下す る内環状リップ部と、この内環状リップ部に対して径方向外方に幅広の外環状凹 部を形成して第二の基体部の下面から垂下する外環状リップ部と、この外環状リ ップ部と共に幅狭の外環状凹部を形成しかつ内周面に係合部をもって第二の基体 部の下面から垂下して第二の基体部の外周面に連なつた環状係合垂下部とを備え ており、上部ケースは、環状係合垂下部の係合部を環状係合突出部の係合部に弾 性装着させ、内環状凹部を環状突出部に係合させて下部ケースと相対回転可能に 組合わされており、幅広の外環状凹部と下部ケースの環状凹部との間にはリング 状の合成樹脂製軸受片が端面を夫々幅広の外環状凹部及び下部ケースの環状凹部 の底面に摺接させて収納されており、内環状凹部とこの内環状凹部に係合する環 状突出部の端面との環状隙間には、密封リングが装着されていることを特徴とす る合成樹脂スラスト軸受が提供される。 According to the present invention, in order to achieve the above-mentioned purpose, a lower case made of synthetic resin and a synthetic resin are used. Consists of a fat upper case and a synthetic resin bearing piece placed between the upper and lower cases. In a synthetic resin thrust bearing, the lower case has a first insertion hole in the center. A disc-shaped first base portion and an annular stepped portion radially outward with respect to the first insertion hole. The annular protrusion is disposed and protrudes from the upper surface of the first base portion, and has an engaging portion on the outer circumferential surface. An annular engagement protrusion extending from the outer peripheral surface of the first base body and protruding from the upper surface of the first base body. and a portion formed on the upper surface of the first base portion between the annular engagement protrusion and the annular protrusion. The upper case has a second insertion hole in the center. A disc-shaped second base part and a second base part connected to the second insertion hole and hanging from the lower surface of the second base part. An annular hanging part whose tip faces the annular stepped part of the lower case, and an annular hanging part In contrast, a narrow inner annular recess is formed radially outward and hangs down from the lower surface of the second base part. an inner annular lip portion, and an outer annular recess that is wide radially outward from the inner annular lip portion. an outer annular lip portion forming a portion and depending from the lower surface of the second base portion; A narrow outer annular recess is formed together with the top part, and an engaging part is formed on the inner circumferential surface of the second base body. and an annular engaging hanging part that hangs down from the lower surface of the part and continues to the outer peripheral surface of the second base part. The upper case elastically connects the engaging part of the annular engaging hanging part to the engaging part of the annular engaging protrusion. The inner annular recess is engaged with the annular protrusion to enable relative rotation with the lower case. There is a ring between the wide outer annular recess and the annular recess of the lower case. A synthetic resin bearing piece with a shape of 300 mm has its end faces formed into a wide outer annular recess and an annular recess in the lower case. The inner annular recess and the ring that engages with the inner annular recess are stored in sliding contact with the bottom surface of the A sealing ring is installed in the annular gap between the end face of the shaped protrusion. A synthetic resin thrust bearing is provided.
【００１７】 また、上述した目的を達成するべく本考案によれば、幅狭の外環状凹部には環 状係合突出部が係合されて上部ケースが下部ケースに相対回転可能に組合わされ ており、幅狭の外環状凹部と環状係合突出部の端面との環状隙間には、他の密封 リングが装着されていることを特徴とする上述の合成樹脂スラスト軸受が提供さ れる。[0017] Further, according to the present invention, in order to achieve the above-mentioned object, the narrow outer annular recess has a ring. The engagement protrusions are engaged so that the upper case is relatively rotatably combined with the lower case. The annular gap between the narrow outer annular recess and the end face of the annular engagement protrusion is provided with other sealing material. The synthetic resin thrust bearing described above is provided, which is characterized by being equipped with a ring. It will be done.
【００１８】 本考案の合成樹脂スラスト軸受おいて密封リングとしては、その横断面形状が 円形を呈するゴムリング或いはその横断面形状がＵ字形、Ｘ字形、Ｙ字形、くの 字形を呈するゴムリングを使用し得る。[0018] In the synthetic resin thrust bearing of this invention, the sealing ring has a cross-sectional shape of A rubber ring that is circular or whose cross-sectional shape is U-shaped, X-shaped, Y-shaped, or A rubber ring presenting a glyph shape may be used.
【００１９】 また、本考案合成樹脂スラスト軸受としては、本スラスト軸受が組込まれるス トラット型サスペンションの構成によっては、合成樹脂製の下部ケースの下面に 下部ケースの挿通孔と同径の挿通孔をもった円筒部を両挿通孔を連通させて一体 に形成された態様を採ることができる。[0019] In addition, the synthetic resin thrust bearing of the present invention is installed in the thrust bearing. Depending on the configuration of the trut-type suspension, the bottom surface of the synthetic resin lower case may A cylindrical part with an insertion hole of the same diameter as the insertion hole of the lower case is integrated by communicating both insertion holes. It is possible to adopt an embodiment formed in the following manner.
【００２０】 本考案の合成樹脂ラスト軸受における上部及び下部ケースを構成する合成樹脂 は、耐摩耗性、耐衝撃性、耐クリープ性等の摺動特性及び機械的特性に優れてい ることが好ましく、また上部及び下部ケース間に収容される軸受片を構成する合 成樹脂は特に自己潤滑性を有することが好ましく、例えばポリアセタール樹脂、 ポリアミド樹脂、ポリブチレンテレフタレート（ＰＢＴ）等のポリエステル樹脂 、ポリエチレン、ポリプロピレン等のポリオレフィン樹脂等が良好に使用され、 このほかポリカーボネート樹脂等も使用し得る。[0020] Synthetic resin constituting the upper and lower cases of the synthetic resin last bearing of the present invention has excellent sliding and mechanical properties such as wear resistance, impact resistance, and creep resistance. It is preferable that the joint constituting the bearing piece housed between the upper and lower cases It is particularly preferable that the synthetic resin has self-lubricating properties, such as polyacetal resin, Polyester resins such as polyamide resins and polybutylene terephthalate (PBT) , polyolefin resins such as polyethylene and polypropylene are well used, In addition, polycarbonate resin and the like may also be used.
【００２１】 上部及び下部ケースには、軸受片を構成する合成樹脂と同様の合成樹脂が使用 され得るが、特に軸受片に使用される合成樹脂と摩擦特性の良好な組合わせであ って、しかも比較的剛性の高い合成樹脂であることが望ましい。その望ましい組 合わせについて例示すると下表の通りである。[0021] The upper and lower cases are made of the same synthetic resin that makes up the bearing piece. However, it has a particularly good combination of synthetic resin used for bearing pieces and frictional properties. Therefore, it is desirable to use a synthetic resin with relatively high rigidity. the desired group Examples of alignment are shown in the table below.
【００２２】[0022]
軸受片 上部及び下部ケース 摩擦係数 摩耗量（ｍｍ） ポリアセタール ポリアミド ０．０５ ０．０２０ ポリアミド ポリアセタール ０．０４ ０．０２１ ポリエチレン ポリアセタール ０．０４ ０．０３８ ポリアセタール ＢＰＴ ０．０７ ０．０４５ ポリアセタール ポリアセタール ０．０６ ０．０２５ ポリアセタール スチール（鋼） ０．１１ ０．０９５ Bearing piece Upper and lower case Friction coefficient Wear amount (mm) Polyacetal Polyamide 0.05 0.020 Polyamide Polyacetal 0.04 0.021 Polyethylene Polyacetal 0.04 0.038 Polyacetal BPT 0.07 0.045 Polyacetal Polyacetal 0.06 0.025 Polyacetal Steel 0.11 0.095
【００２３】 表中、摩擦特性は次の試験条件により行った結果である。[0023] In the table, the friction characteristics are the results obtained under the following test conditions.
【００２４】 ［試験条件］ スラスト荷重 ３５０ｋｇ／ｃｍ2 揺動角度 ±３５度 揺動速度 ６０ｃｐｍ 潤滑方法 始動時グリースを摺動面に塗布[Test conditions] Thrust load 350 kg/cm 2 Swing angle ±35 degrees Swing speed 60 cpm Lubrication method Apply grease to sliding surface at startup
【００２５】 なお、摩耗量は上記試験を１００万回サイクル行った後の軸受片の寸法変化量 （ｍｍ）を示す。[0025] The amount of wear is the amount of dimensional change in the bearing piece after performing the above test 1 million times. (mm).
【００２６】[0026]
本考案の合成樹脂スラスト軸受では、上部ケースの幅狭の内環状凹部とこの内 環状凹部に係合する下部ケースの環状突出部の端面との環状隙間に装着された密 封リングが、合成樹脂スラスト軸受の内周面側を介する上部ケースの幅広の環状 凹部及び下部ケースの環状凹部と両凹部間に収容される軸受片との摺動面への塵 埃等の侵入を防止する。 The synthetic resin thrust bearing of this invention has a narrow inner annular recess in the upper case and a A seal installed in the annular gap between the end face of the annular protrusion of the lower case that engages with the annular recess. The sealing ring is a wide annular part of the upper case that passes through the inner circumferential side of the synthetic resin thrust bearing. Dust on the sliding surface of the recess and the annular recess of the lower case and the bearing piece accommodated between both recesses. Prevent the intrusion of dust, etc.
【００２７】 本考案の合成樹脂スラスト軸受は、前述した従来技術のスラスト軸受よりも、 その構造が簡略化されているので軸受全体の外形を小さくすることができ、それ により軸受の回転トルク半径が小さくなり、揺動回転トルクが小さくなる。この 作用により、密封リングの摺動摩擦力への影響が相殺され、密封リングの摩擦力 に起因する操舵力の増大はない。[0027] The synthetic resin thrust bearing of the present invention is superior to the conventional thrust bearing described above. Since its structure is simplified, the overall external shape of the bearing can be reduced, and As a result, the rotational torque radius of the bearing becomes smaller, and the swinging rotational torque becomes smaller. this This action cancels out the effect on the sliding friction force of the sealing ring, and reduces the frictional force of the sealing ring. There is no increase in steering force due to this.
【００２８】 軸受摺動面は上部ケースの幅広の外環状凹部底面と軸受片の端面及び下部ケー スの環状凹部底面と軸受片の端面とに形成され、操舵力に対していずれか摩擦抵 抗の小さい方で回転する。[0028] The bearing sliding surface is the bottom of the wide outer annular recess of the upper case, the end face of the bearing piece, and the lower case. It is formed on the bottom surface of the annular recess of the bearing and the end surface of the bearing piece. It rotates with the smaller resistance.
【００２９】[0029]
以下、本考案の合成樹脂スラスト軸受を図に示す実施例を参照して詳細に説明 する。 The synthetic resin thrust bearing of the present invention will be explained in detail below with reference to the examples shown in the drawings. do.
【００３０】 図１において、合成樹脂スラスト軸受Ａは合成樹脂製の下部ケースＢと合成樹 脂製の上部ケースＣと上部及び下部ケースＣ及びＢ間に収容される合成樹脂製の 軸受片Ｄとから構成されている。[0030] In Fig. 1, a synthetic resin thrust bearing A has a synthetic resin lower case B and a synthetic resin A plastic upper case C and a synthetic resin case housed between the upper and lower cases C and B. It is composed of a bearing piece D.
【００３１】 下部ケースＢは、中央部に挿通孔２０を有する円板状の基体部２１と挿通孔２ ０に対して径方向外方に環状段部２２を介して基体部２１の上面から突設された 環状突出部２３と突出部２３に対して径方向外方に幅広の環状凹部２４を形成し て基体部２１の上面から突出する環状突条部２５と突条部２５に対して径方向外 方に環状凹部２４よりも幅狭の環状凹部２６を形成してかつ外周面に係合部２７ をもって基体部２１の上面から突出して基体部２１の外周面に連なる環状係合突 出部２８とを備えている。[0031] The lower case B includes a disc-shaped base portion 21 having an insertion hole 20 in the center and an insertion hole 2. 0, protruding from the upper surface of the base body 21 via the annular step 22 radially outward. A wide annular recess 24 is formed radially outward from the annular protrusion 23 and the protrusion 23. The annular protrusion 25 protrudes from the upper surface of the base portion 21 and the protrusion 25 is radially outward. An annular recess 26 narrower than the annular recess 24 is formed on the outer peripheral surface of the annular recess 26, and an engaging portion 27 is formed on the outer peripheral surface. An annular engagement protrusion protrudes from the upper surface of the base body 21 and extends to the outer peripheral surface of the base body 21. It is equipped with an exit part 28.
【００３２】 環状係合突出部２８に形成された係合部２７はその外周面に端部から下方に向 かう傾斜面部２７ａと傾斜面部２７ａに連なり傾斜面部２７ａと環状角凸部を形 成して基体部２１外周面に連なる傾斜面部２７ｂとから形成されている。[0032] The engaging portion 27 formed on the annular engaging protrusion 28 extends downward from the end on the outer circumferential surface thereof. The inclined surface portion 27a is connected to the inclined surface portion 27a to form an annular corner convex portion. The sloped surface portion 27b is continuous with the outer circumferential surface of the base portion 21.
【００３３】 下部ケースＢの基体部２１下面に挿通孔２０を挟んで相対向して凸部３０が形 成されている。[0033] Convex portions 30 are formed on the lower surface of the base portion 21 of the lower case B, facing each other across the insertion hole 20. has been completed.
【００３４】 上部ケースＣは、中央部に下部ケースＢの挿通孔２０と同径の挿通孔４０を有 する円板状の基体部４１と基体部４１の下面から垂下して挿通孔４０に連設する 環状垂下部４２と垂下部４２に対して径方向外方に幅狭の内環状凹部４３を形成 して基体部４１の下面から垂下する内環状リップ部４４とリップ部４４に対して 径方向外方に内環状凹部４３よりも幅広の環状凹部４５を形成して基体部４１の 下面から垂下する外環状リップ部４６とリップ部４６と共に環状凹部４５よりも 幅狭の外環状凹部４７を形成しかつ内周面下方に係合部４８をもって垂下して基 体部４１外周面に連なる環状係合垂下部４９とを備えている。[0034] The upper case C has an insertion hole 40 in the center that has the same diameter as the insertion hole 20 of the lower case B. A disk-shaped base portion 41 that hangs down from the lower surface of the base portion 41 and is connected to the insertion hole 40. An annular hanging portion 42 and a narrow inner annular recess 43 are formed radially outward from the hanging portion 42. With respect to the inner annular lip portion 44 hanging from the lower surface of the base portion 41 and the lip portion 44, An annular recess 45 wider than the inner annular recess 43 is formed outward in the radial direction so that the base portion 41 is The outer annular lip portion 46 hanging from the lower surface and the lip portion 46 are lower than the annular recess 45. A narrow outer annular recess 47 is formed, and an engaging portion 48 hangs down from the inner peripheral surface to form a base. The body portion 41 includes an annular engaging hanging portion 49 that extends to the outer circumferential surface of the body portion 41 .
【００３５】 環状係合垂下部４９に形成された係合部４８は垂下部４９の内周面に下部ケー スＢの環状係合突出部２８の傾斜面部２７ａに対応する傾斜面部４８ａと傾斜面 部４８ａに連なり傾斜面部４８ａと環状角凹部を形成する傾斜面部４８ｂとから 形成されている。[0035] The engagement portion 48 formed in the annular engagement hanging portion 49 is attached to the inner circumferential surface of the hanging portion 49 of the lower case. An inclined surface portion 48a corresponding to the inclined surface portion 27a of the annular engagement protrusion 28 of the space B and an inclined surface From the inclined surface part 48b which continues to the part 48a and forms the inclined surface part 48a and the annular corner recessed part. It is formed.
【００３６】 上部ケースＣは環状係合垂下部４９の係合部４８を下部ケースＢの環状係合突 出部２８の係合部２７に弾性装着（スナップフィット）させ、幅狭の内環状凹部 ４３を下部ケースの環状突出部２３に係合させ下部ケースＢと相対回転可能に組 合わされている。この組合わせにより、環状係合垂下部４９の係合部４８と下部 ケースＢの環状係合突出部２８の係合部２７との弾性装着部と下部ケースＢの幅 狭の環状凹部２６と凹部２６に係合する上部ケースＣの外環状リップ部４６との 間に密封部とが形成されており、これら弾性装着部及び密封部はラビリンス作用 をなしている。[0036] The upper case C connects the engagement part 48 of the annular engagement hanging part 49 to the annular engagement protrusion of the lower case B. The engagement part 27 of the exit part 28 is elastically attached (snap fit), and a narrow inner annular recess is formed. 43 is engaged with the annular protrusion 23 of the lower case and assembled so that it can rotate relative to the lower case B. It is matched. With this combination, the engaging part 48 of the annular engaging hanging part 49 and the lower part The width of the elastic attachment part of the annular engagement protrusion 28 of the case B with the engagement part 27 and the lower case B The narrow annular recess 26 and the outer annular lip 46 of the upper case C that engages with the recess 26 A sealing part is formed in between, and these elastic attachment parts and sealing parts have a labyrinth effect. is doing.
【００３７】 上部及び下部ケースＣ及びＢ間に収容される合成樹脂製軸受片Ｄは、上部ケー スＣの内環状リップ部４４の外径より大きい内径を有し、外環状リップ部４６の 内径より小さい外径を有するリング状からなり、軸受片Ｄの端面には図２に示す ように夫々放射状に複数個の溝５０が周方向に３０度の位相差をもって形成され ている。溝５０はグリース等の潤滑剤の溜部となる。[0037] The synthetic resin bearing piece D accommodated between the upper and lower cases C and B is The outer annular lip portion 46 has an inner diameter larger than the outer diameter of the inner annular lip portion 44 of the It has a ring shape with an outer diameter smaller than the inner diameter, and the end face of the bearing piece D has a ring shown in FIG. A plurality of grooves 50 are formed radially with a phase difference of 30 degrees in the circumferential direction. ing. The groove 50 serves as a reservoir for lubricant such as grease.
【００３８】 軸受片Ｄは下部ケースＢの幅広の環状凹部２４と上部ケースＣの幅広の外環状 凹部４５との間に端面を夫々凹部２４及び４５の底部に摺接させて配されており 、軸受片Ｄの端面とこの端面と摺接する凹部２４及び４５の底面との間に摺動面 が形成されている。[0038] The bearing piece D has a wide annular recess 24 in the lower case B and a wide outer annular part in the upper case C. It is arranged between the recess 45 so that the end surface is in sliding contact with the bottom of the recess 24 and 45, respectively. , a sliding surface is provided between the end surface of the bearing piece D and the bottom surfaces of the recesses 24 and 45 that are in sliding contact with this end surface. is formed.
【００３９】 上部ケースＣの幅狭の内環状凹部４３と凹部４３に係合する下部ケースＢの環 状突出部２３の端面との間に形成される環状隙間７０には、密封リング６０が装 着されており、本例では、密封リング６０としては、横断面形状が円形を呈する ゴムリングが使用されている。[0039] The narrow inner annular recess 43 of the upper case C and the ring of the lower case B that engages with the recess 43 A sealing ring 60 is installed in an annular gap 70 formed between the end face of the protrusion 23 and the annular gap 70. In this example, the sealing ring 60 has a circular cross-sectional shape. A rubber ring is used.
【００４０】 このように構成された合成樹脂スラスト軸受Ａは、図３に示すストラットアッ センブリに組込まれる。即ち、合成樹脂スラスト軸受Ａは、下部ケースＢの基体 部２１の挿通孔２０と上部ケースＣの円板状の基体部４１の挿通孔４０とをスト ラットアッセンブリのピストンロッドＲの外周面に両者間に軸受隙間（クリアラ ンス）を保持させて挿通し、下部ケースＢの基体部２１下面を上部バネ座シート Ｓの平面部Ｓ１に当接させると共に基体部２１下面の凸部３０をバネ座シートＳ の平面部Ｓ１に設けられた嵌合孔Ｓ２に嵌合させ、上部ケースＣの円板状の基体 部４１上面を車体側取付部Ｆに当接せしめ配置される。凸部３０と嵌合孔Ｓ２と の嵌合により、下部ケースＢの回転が阻止される。[0040] The synthetic resin thrust bearing A constructed in this way is constructed using a strut assembly shown in Fig. 3. incorporated into the assembly. That is, the synthetic resin thrust bearing A is attached to the base of the lower case B. The insertion hole 20 of the portion 21 and the insertion hole 40 of the disc-shaped base portion 41 of the upper case C are There is a bearing clearance (clearance clearance) between the two on the outer circumferential surface of the piston rod R of the rat assembly. hold the base part 21 of the lower case B and insert it into the upper spring seat sheet. The convex portion 30 on the lower surface of the base portion 21 is brought into contact with the flat portion S1 of the spring seat sheet S. The disc-shaped base of the upper case C is fitted into the fitting hole S2 provided in the flat part S1 of the upper case C. The upper surface of the portion 41 is placed in contact with the vehicle body side mounting portion F. The convex portion 30 and the fitting hole S2 By fitting, rotation of the lower case B is prevented.
【００４１】 このように組込まれた合成樹脂スラスト軸受Ａにおいて、下部ケースＢの幅広 の環状凹部２４と上部ケースＣの幅広の外環状凹部４５と両凹部２４及び２５間 に凹部２４及び２５の底部と摺接させて配された軸受片Ｄとで形成される軸受摺 動面は、その内周面側においては密封リング６０により、外周面側においてはラ ビリンス作用をなす密封部により、軸受内外周面からの塵埃等の侵入から保護さ れるので、軸受摺動面への塵埃等の侵入は防止される。特に、軸受内周面側は密 封リング６０によって塵埃等の侵入から保護されるので、バンプストッパーＧの バネ座シートＳへの当接による弾性変形に起因するポンプ作用による塵埃等の圧 送に対して防止効果が高められる。[0041] In the synthetic resin thrust bearing A assembled in this way, the lower case B is wide. between the annular recess 24 and the wide outer annular recess 45 of the upper case C and both recesses 24 and 25. A bearing slide formed by a bearing piece D disposed in sliding contact with the bottom of the recesses 24 and 25. The moving surface is sealed by a sealing ring 60 on its inner circumference side and by a sealing ring on its outer circumference side. The sealing part that acts as a rinsing protects the bearing from dust and other intrusion from the inner and outer peripheral surfaces of the bearing. This prevents dust from entering the bearing sliding surface. In particular, the inner peripheral surface of the bearing is The sealing ring 60 protects the bump stopper G from intrusion of dust, etc. Pressure of dust, etc. due to pump action caused by elastic deformation due to contact with spring seat S The effect of preventing transmission is enhanced.
【００４２】 また、合成樹脂スラスト軸受Ａはその外径が小さく形成されるので、軸受Ａの 回転トルク半径が小さくなり、揺動回転トルクが小さくなる。その結果、密封リ ング６０の摺動摩擦力への影響が相殺され、密封リング６０の摩擦力に起因する 操舵力の増大はない。[0042] In addition, since the synthetic resin thrust bearing A is formed with a small outer diameter, The rotation torque radius becomes smaller, and the swing rotation torque becomes smaller. As a result, the sealed lid The effect on the sliding friction force of the ring 60 is canceled out, and the effect is due to the friction force of the sealing ring 60. There is no increase in steering force.
【００４３】 次に本考案の他の実施例を図４に基づいて説明する。図４において、本実施例 における合成樹脂スラスト軸受Ａは、下部ケースＢの中央部に形成された挿通孔 ２０を含む下面に、挿通孔２０と同径の挿通孔８１を有する円筒部８０を挿通孔 ２０に連設させて一体に形成されている。[0043] Next, another embodiment of the present invention will be described based on FIG. In FIG. 4, this example The synthetic resin thrust bearing A is inserted into the insertion hole formed in the center of the lower case B. A cylindrical portion 80 having an insertion hole 81 having the same diameter as the insertion hole 20 is inserted into the lower surface including the insertion hole 20. 20 and is integrally formed.
【００４４】 この実施例からなる合成樹脂スラスト軸受Ａは、特にスラスト軸受が組込まれ るストラット型サスペンションにラジアル方向荷重が作用する構造において、ラ ジアル荷重を円筒部８０で支持するようにしたものである。[0044] The synthetic resin thrust bearing A made of this example is particularly designed with a built-in thrust bearing. In structures where radial loads are applied to strut-type suspensions, The dial load is supported by the cylindrical portion 80.
【００４５】 更に本考案によれば、図５に示すように合成樹脂スラスト軸受Ａを構成しても 良い。[0045] Furthermore, according to the present invention, even if the synthetic resin thrust bearing A is configured as shown in FIG. good.
【００４６】 図５において、本例の合成樹脂製下部ケースＢは、中央部に挿通孔２０を有す る基体部２１と挿通孔２０に対して径方向外方に環状段部２２をもって突出し基 体部２１の上面に連なる環状突出部２３と突出部２３に対して径方向外方に幅広 の環状凹部２４を形成しかつ外周面に係合部２７をもって突出して基体部２１の 外周面に連なる環状係合突出部２８とを備えている。[0046] In FIG. 5, the synthetic resin lower case B of this example has an insertion hole 20 in the center. The base protrudes radially outward with an annular stepped portion 22 with respect to the base portion 21 and the insertion hole 20. An annular protrusion 23 that extends to the upper surface of the body 21 and a width that is radially outward relative to the protrusion 23. An annular recess 24 is formed, and an engaging portion 27 protrudes from the outer peripheral surface of the base portion 21. An annular engagement protrusion 28 continuous to the outer circumferential surface is provided.
【００４７】 本例の合成樹脂製上部ケースＣは、図１に示した実施例の上部ケースＣと同様 の構成を有する。即ち上部ケースＣは、中央部に下部ケースＢの挿通孔２０と同 径の挿通孔４０を有する円板状の基体部４１と基体部４１の下面から垂下して挿 通孔４０に連設された環状垂下部４２と垂下部４２に対して径方向外方に幅狭の 内環状凹部４３を形成して基体部４１の下面から垂下する内環状リップ部４４と リップ部４４に対して径方向外方に幅広の外環状凹部４５を形成して基体部４１ の下面から垂下する外環状リップ部４６とリップ部４６と共に幅狭の外環状凹部 ４７を形成しかつ内周面下方に係合部４８をもって基体部４１の下面から垂下し て基体部４１外周面に連なる環状係合垂下部４９とを備えている。[0047] The synthetic resin upper case C of this example is similar to the upper case C of the example shown in FIG. It has the following configuration. That is, the upper case C has the same insertion hole 20 in the lower case B in the center. A disk-shaped base portion 41 having an insertion hole 40 with a diameter of An annular hanging part 42 connected to the through hole 40 and a narrow width radially outward with respect to the hanging part 42. an inner annular lip portion 44 that forms an inner annular recess 43 and hangs down from the lower surface of the base portion 41; A wide outer annular recess 45 is formed radially outward with respect to the lip portion 44 to form the base portion 41. An outer annular lip 46 depending from the lower surface of the outer annular recess with a narrow outer annular recess along with the lip 46 47 and hangs down from the lower surface of the base portion 41 with an engaging portion 48 below the inner peripheral surface. The base portion 41 has an annular engaging hanging portion 49 connected to the outer circumferential surface of the base portion 41 .
【００４８】 上部ケースＣは、幅狭の外環状凹部４７を下部ケースＢの環状係合突出部２８ に係合させると共に環状係合垂下部４９の係合部４８を下部ケースＢの環状係合 突出部２８の係合部２７に弾性装着（スナップフィット）させ、幅狭の内環状凹 部４３を下部ケースＢの環状突出部２３に係合させて下部ケースＢと相対回転可 能に組合わされている。[0048] The upper case C connects the narrow outer annular recess 47 to the annular engagement protrusion 28 of the lower case B. At the same time, the engaging part 48 of the annular engaging hanging part 49 is engaged with the annular engaging part 48 of the lower case B. The engaging part 27 of the protruding part 28 is elastically attached (snap fit), and a narrow inner annular recess is formed. The part 43 can be engaged with the annular protrusion 23 of the lower case B to rotate relative to the lower case B. It is combined with Noh.
【００４９】 そして、下部ケースＢの幅広の環状凹部２４と上部ケースＣの幅広の外環状凹 部４５との間に端面を夫々凹部２４及び４５の底部に摺接させて合成樹脂製軸受 片Ｄが配されていると共に上部ケースＣの幅狭の内環状凹部４３と凹部４３に係 合する下部ケースＢの環状突出部２３の端面との環状隙間７０及び上部ケースＣ の幅狭の外環状凹部４７と凹部４７に係合する環状係合突出部２８の端面との環 状隙間７０ａには夫々密封リング６０、６０が装着されている。[0049] Then, a wide annular recess 24 of the lower case B and a wide outer annular recess of the upper case C. A synthetic resin bearing is formed between the part 45 and the end face slidingly in contact with the bottom of the recesses 24 and 45, respectively. The piece D is disposed and engages the narrow inner annular recess 43 of the upper case C and the recess 43. An annular gap 70 between the end face of the annular protrusion 23 of the lower case B and the upper case C The ring between the narrow outer annular recess 47 and the end surface of the annular engagement protrusion 28 that engages with the recess 47 Sealing rings 60, 60 are attached to the shaped gaps 70a, respectively.
【００５０】 図５に示す合成樹脂スラスト軸受Ａは、内外周面側に夫々密封リング６０によ り密封部が形成されているので、軸受摺動面への塵埃等の侵入に対しては図１に 示す合成樹脂スラスト軸受Ａよりも、より一層の防止効果が発揮される。[0050] The synthetic resin thrust bearing A shown in FIG. 5 has sealing rings 60 on the inner and outer peripheral surfaces. Since a sealed part is formed, the intrusion of dust etc. into the bearing sliding surface can be prevented as shown in Figure 1. It exhibits a more effective prevention effect than the synthetic resin thrust bearing A shown in FIG.
【００５１】 なお、本例の合成樹脂スラスト軸受Ａにおいても、図４の実施例で説明したよ うに、下部ケースＢの中央部に形成された挿通孔２０を含む下面に、挿通孔２０ と同径の挿通孔８１を有する円筒部８０を挿通孔２０と連設させて一体に形成し た態様を採ることができる。[0051] Note that the synthetic resin thrust bearing A of this example also has the same characteristics as explained in the example of FIG. In addition, an insertion hole 20 is formed on the lower surface of the lower case B including the insertion hole 20 formed in the center of the lower case B. A cylindrical portion 80 having an insertion hole 81 having the same diameter as the insertion hole 20 is connected to and integrally formed with the insertion hole 20. It is possible to adopt a different mode.
【００５２】 上述した実施例においては、密封リング６０として横断面形状が円形を呈する ゴムリングを使用したが、密封リング６０としては、その他横断面形状がＵ字形 、Ｘ字形、Ｙ字形を呈するゴムリングを使用することもできる。[0052] In the embodiment described above, the sealing ring 60 has a circular cross-sectional shape. Although a rubber ring was used, the sealing ring 60 may also have a U-shaped cross section. , X-shape, Y-shape rubber rings can also be used.
【００５３】[0053]
上述した構成からなる本考案の合成樹脂スラスト軸受は、以下に述べる特有の 効果を有する。 The synthetic resin thrust bearing of the present invention, which has the above-mentioned configuration, has the following unique features. have an effect.
【００５４】 上部ケースと下部ケースとの間には、軸受の内周面側に密封リングによる密封 部が形成され、外周面側にラビリンス作用による密封部が形成されているので、 上部及び下部ケースと上部及び下部ケース間に配される軸受片とで形成される軸 受摺動面への塵埃等の侵入は防止される。[0054] A sealing ring is used on the inner surface of the bearing between the upper case and the lower case. A sealing part is formed on the outer peripheral surface side by a labyrinth effect, so A shaft formed by upper and lower cases and a bearing piece placed between the upper and lower cases. Dust and the like are prevented from entering the receiving sliding surface.
【００５５】 更に、軸受の内周面側及び外周面側共に密封リングによる密封部が夫々形成さ れている本考案の一つでは、上部及び下部ケースと上部及び下部ケース間に配さ れる軸受片とで形成される軸受摺動面への塵埃等の侵入防止効果は一層高められ る。[0055] Furthermore, sealing portions are formed by sealing rings on the inner and outer circumferential surfaces of the bearing. In one of the present inventions, the upper and lower cases are arranged between the upper and lower cases. The effect of preventing dust from entering the bearing sliding surface formed by the bearing piece is further enhanced. Ru.
【００５６】 上部及び下部ケースの構成が従来の軸受に比べ、簡略されているので、軸受全 体の外径を小さくすることができるばかりでなく、軸受の回転トルク半径が小さ くなり、揺動回転トルクが小さくなる。その結果、密封リングの摺動摩擦力への 影響が相殺され、密封リングの摩擦力に起因する操舵力の増大はない。[0056] The structure of the upper and lower cases is simpler than that of conventional bearings, so the entire bearing Not only can the outer diameter of the body be made smaller, but the rotating torque radius of the bearing is also smaller. The oscillating rotational torque becomes smaller. As a result, the sliding friction force of the sealing ring The effects cancel out and there is no increase in steering force due to the frictional forces of the sealing ring.
【００５７】[0057]
【図１】本考案の合成樹脂スラスト軸受の好ましい実施
例を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing a preferred embodiment of the synthetic resin thrust bearing of the present invention.
【図２】図１に示す合成樹脂スラスト軸受に用いられる
合成樹脂軸受片を示す平面図である。FIG. 2 is a plan view showing a synthetic resin bearing piece used in the synthetic resin thrust bearing shown in FIG. 1;
【図３】図１に示す合成樹脂スラスト軸受をストラット
アッセンブリに組込んだ状態を示す縦断面図である。FIG. 3 is a longitudinal sectional view showing the synthetic resin thrust bearing shown in FIG. 1 assembled into a strut assembly.
【図４】本考案の合成樹脂スラスト軸受の好ましい他の
実施例を示す縦断面図である。FIG. 4 is a longitudinal sectional view showing another preferred embodiment of the synthetic resin thrust bearing of the present invention.
【図５】本考案の合成樹脂スラスト軸受の更に他の好ま
しい実施例を示す縦断面図である。FIG. 5 is a longitudinal sectional view showing still another preferred embodiment of the synthetic resin thrust bearing of the present invention.
【図６】従来の合成樹脂スラスト軸受を示す縦断面図で
ある。FIG. 6 is a longitudinal sectional view showing a conventional synthetic resin thrust bearing.
【図７】従来の合成樹脂スラスト軸受をストラットアッ
センブリに組込んだ状態を示す縦断面図である。FIG. 7 is a longitudinal cross-sectional view showing a state in which a conventional synthetic resin thrust bearing is assembled into a strut assembly.
Ａ 合成樹脂スラスト軸受 Ｂ 合成樹脂製の下部ケース Ｃ 合成樹脂製の上部ケース Ｄ 合成樹脂製の軸受片 ２１ 円板状の基体部 ２３ 環状突出部 ２４ 幅広の環状凹部 ２６ 幅狭の環状凹部 ２８ 環状係合突出部 ４１ 円板状の基体部 ４２ 環状垂下部 ４３ 幅狭の内環状凹部 ４４ 内環状リップ部 ４５ 幅広の外環状凹部 ４６ 外環状リップ部 ４７ 幅狭の外環状凹部 ４９ 環状係合垂下部 ６０ 密封リング A Synthetic resin thrust bearing B Lower case made of synthetic resin C Synthetic resin upper case D Synthetic resin bearing piece 21 Disc-shaped base portion 23 Annular protrusion 24 Wide annular recess 26 Narrow annular recess 28 Annular engagement protrusion 41 Disc-shaped base portion 42 Annular hanging part 43 Narrow inner annular recess 44 Inner annular lip part 45 Wide outer annular recess 46 Outer annular lip part 47 Narrow outer annular recess 49 Annular engagement hanging part 60 Sealing ring
フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ１６Ｆ 9/54 8714−3Ｊ Ｆ１６Ｊ 15/447 6826−3Ｊ Continuing from the front page (51) Int.Cl. 5 Identification code Internal reference number FI Technical display location F16F 9/54 8714-3J F16J 15/447 6826-3J
Claims (3)
ケースと上部及び下部ケース間に配される合成樹脂製軸
受片とから成る合成樹脂スラスト軸受において、下部ケ
ースは、中央部に第一の挿通孔を有する円板状の第一の
基体部と、第一の挿通孔に対して径方向外方に環状段部
を介して配されて第一の基体部の上面に突設された環状
突出部と、外周面に係合部をもち第一の基体部外周面に
連なって第一の基体部の上面に突設された環状係合突出
部と、この環状係合突出部と環状突出部との間であって
第一の基体部の上面に形成された環状凹部とを備えてお
り、上部ケースは、中央部に第二の挿通孔を有する円板
状の第二の基体部と、第二の挿通孔に連設されて第二の
基体部の下面から垂下して先端が下部ケースの環状段部
に対向した環状垂下部と、この環状垂下部に対して径方
向外方に幅狭の内環状凹部を形成して第二の基体部の下
面から垂下する内環状リップ部と、この内環状リップ部
に対して径方向外方に幅広の外環状凹部を形成して第二
の基体部の下面から垂下する外環状リップ部と、この外
環状リップ部と共に幅狭の外環状凹部を形成しかつ内周
面に係合部をもって第二の基体部の下面から垂下して第
二の基体部の外周面に連なつた環状係合垂下部とを備え
ており、上部ケースは、環状係合垂下部の係合部を環状
係合突出部の係合部に弾性装着させ、内環状凹部を環状
突出部に係合させて下部ケースと相対回転可能に組合わ
されており、幅広の外環状凹部と下部ケースの環状凹部
との間にはリング状の合成樹脂製軸受片が端面を夫々幅
広の外環状凹部及び下部ケースの環状凹部の底面に摺接
させて収納されており、内環状凹部とこの内環状凹部に
係合する環状突出部の端面との環状隙間には、密封リン
グが装着されていることを特徴とする合成樹脂スラスト
軸受。Claim 1: In a synthetic resin thrust bearing consisting of a synthetic resin lower case, a synthetic resin upper case, and a synthetic resin bearing piece disposed between the upper and lower cases, the lower case has a first a disc-shaped first base portion having an insertion hole; and an annular portion disposed radially outward with respect to the first insertion hole via an annular step portion and protruding from the upper surface of the first base portion. a protrusion, an annular engagement protrusion that has an engagement portion on its outer peripheral surface and is connected to the outer circumference of the first base body and protrudes from the upper surface of the first base body; the annular engagement protrusion and the annular protrusion; and an annular recess formed on the upper surface of the first base part between the upper case and the second base part having a disc shape having a second insertion hole in the center part. , an annular hanging part that is connected to the second insertion hole and hangs down from the lower surface of the second base part, the tip of which faces the annular stepped part of the lower case; An inner annular lip part that forms a narrow inner annular recess and hangs down from the lower surface of the second base part; an outer annular lip part that hangs down from the bottom surface of the second base part, and a second part that hangs down from the bottom surface of the second base part, which forms a narrow outer annular recessed part together with the outer annular lip part, and has an engaging part on the inner peripheral surface. The upper case includes an annular engaging hanging part connected to the outer peripheral surface of the second base part, and the upper case has an engaging part of the annular engaging hanging part elastically attached to an engaging part of the annular engaging protrusion. The inner annular recess is engaged with the annular protrusion to allow relative rotation with the lower case, and a ring-shaped synthetic resin bearing piece is disposed between the wide outer annular recess and the annular recess of the lower case. are housed in sliding contact with the bottom surfaces of the wide outer annular recess and the annular recess of the lower case, respectively, and the annular gap between the inner annular recess and the end surface of the annular protrusion that engages with the inner annular recess is sealed. A synthetic resin thrust bearing characterized by being equipped with a ring.
係合されて上部ケースは下部ケースに相対回転可能に組
合わされており、幅狭の外環状凹部と環状係合突出部の
端面との環状隙間には、他の密封リングが装着されてい
ることを特徴とする請求項１に記載の合成樹脂スラスト
軸受。[Claim 2] An annular engagement protrusion is engaged with the narrow outer annular recess, and the upper case is relatively rotatably combined with the lower case, and the narrow outer annular recess and the annular engagement protrusion are engaged with each other. 2. The synthetic resin thrust bearing according to claim 1, wherein another sealing ring is installed in the annular gap between the end face and the end face of the synthetic resin thrust bearing.
通する挿通孔をもった円筒部が一体に形成されている請
求項１又は請求項２に記載の合成樹脂スラスト軸受。3. The synthetic resin thrust bearing according to claim 1, wherein a cylindrical portion having an insertion hole communicating with the first insertion hole is integrally formed on the lower surface of the lower case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991013683U JP2530119Y2 (en) | 1991-02-18 | 1991-02-18 | Synthetic resin thrust bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991013683U JP2530119Y2 (en) | 1991-02-18 | 1991-02-18 | Synthetic resin thrust bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04105218U true JPH04105218U (en) | 1992-09-10 |
| JP2530119Y2 JP2530119Y2 (en) | 1997-03-26 |
Family
ID=31901550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1991013683U Expired - Fee Related JP2530119Y2 (en) | 1991-02-18 | 1991-02-18 | Synthetic resin thrust bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2530119Y2 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2530119Y2 (en) | 1997-03-26 |
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