JP4855151B2 - Bearing device - Google Patents

Bearing device Download PDF

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JP4855151B2
JP4855151B2 JP2006161226A JP2006161226A JP4855151B2 JP 4855151 B2 JP4855151 B2 JP 4855151B2 JP 2006161226 A JP2006161226 A JP 2006161226A JP 2006161226 A JP2006161226 A JP 2006161226A JP 4855151 B2 JP4855151 B2 JP 4855151B2
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boot
bearing
rod
bearing device
housing
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JP2007327628A (en
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和也 白石
嘉範 砂川
滝一 前田
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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  • Sealing Devices (AREA)
  • Diaphragms And Bellows (AREA)
  • Bearings For Parts Moving Linearly (AREA)

Description

本発明は、摺動部の防汚、防水などのためのブーツを備えた軸受装置に関する。   The present invention relates to a bearing device including a boot for antifouling and waterproofing of a sliding portion.

軸方向に移動する軸(ロッド)を支持する軸受は種々の機械、機器に用いられている。一例として、特許文献1には、バルブを開閉させるべく軸方向に移動するロッドを備えたアクチュエータが開示されている。このアクチュエータは、ケース(ハウジング)内に設けられているダイヤフラムの移動により、ダイヤフラムに結合されているロッドが移動し、リンク機構などを介してロッドに連結されているバルブが開閉されるようになっている。ロッドはリンク機構などを介してバルブに連結されているので、軸方向に移動する際にその径方向にも傾動(揺動)する。また、このようなアクチュエータは、一般的にロッドが傾いて(倒れて)装着されるので、ロッド作動時に揺動運動に伴う倒れが発生する。従って、ロッドは、Oリングを介してケースの内面に弾力的に保持された金属製のブッシュに軸受部材を介して支持されている。つまり、ロッドは、ブッシュ、Oリング等からなる軸受により、軸方向に摺動可能、かつ径方向に傾動可能に支持されている。   Bearings that support shafts (rods) that move in the axial direction are used in various machines and devices. As an example, Patent Document 1 discloses an actuator including a rod that moves in an axial direction to open and close a valve. In this actuator, when the diaphragm provided in the case (housing) moves, the rod connected to the diaphragm moves, and the valve connected to the rod via a link mechanism etc. is opened and closed. ing. Since the rod is connected to the valve via a link mechanism or the like, when the rod moves in the axial direction, it also tilts (oscillates) in its radial direction. In addition, such an actuator is generally mounted with the rod tilted (tilted), and therefore, tilting due to the swinging motion occurs when the rod is actuated. Therefore, the rod is supported via a bearing member on a metal bush that is elastically held on the inner surface of the case via an O-ring. That is, the rod is supported by a bearing made of a bush, an O-ring or the like so that it can slide in the axial direction and tilt in the radial direction.

このような構造の軸受では、ロッドが傾動することから、アクチュエータのケースにおけるロッドが貫通する孔は、ロッドの傾動を許容するように余裕をもって形成されている。つまり、ロッドと孔の縁との間には隙間ができるように図られている。しかし、このように隙間を設けると、その隙間から軸受部であるロッドと軸受部材との間にちりやほこり、水などが侵入するおそれがある。軸受部へのちりやほこり、水などの侵入は、軸受部の動作不良を引き起こしかねないので、厳に防止する必要がある。そこで、ケースとロッドとにまたがってゴム製のブーツをかぶせ、軸受部及びロッドを防汚、防水することが考えられている。   In the bearing having such a structure, since the rod tilts, the hole through which the rod penetrates in the actuator case is formed with a margin so as to allow the rod to tilt. That is, a gap is created between the rod and the edge of the hole. However, when a gap is provided in this way, dust, dust, water, or the like may enter between the rod that is the bearing portion and the bearing member from the gap. Since intrusion of dust, dust, water or the like into the bearing portion may cause malfunction of the bearing portion, it must be strictly prevented. Therefore, it is considered to cover the case and the rod with a rubber boot so that the bearing and the rod are soiled and waterproofed.

ブーツを設ける構造としては、ロッドが貫通する孔より外側においてケースにブーツ係止具を設け、ロッドを囲むブーツの一端をブーツ係止具に嵌め込むと共にブーツの他端をロッドに密着固定するものが考えられている。   As a structure to provide boots, a boot locking tool is provided on the case outside the hole through which the rod passes, and one end of the boot surrounding the rod is fitted into the boot locking tool, and the other end of the boot is closely fixed to the rod. Is considered.

実開昭59−130028号公報Japanese Utility Model Publication No.59-130028

しかしながら、上述したブーツを設ける構造では、ブーツの係止具を設けるためにアクチュエータのケース自体の形状を変更して係止具を作るか、ゴムなどで作られた専用の係止具を追加する必要があり、構造が複雑となるだけでなく費用がかかってしまう。また、この種のアクチュエータは、前述したようにロッドが傾いた状態で取り付けられることがあり、取り付けられた状態ですでにブーツには偏荷重が加わってしまうというということもある。更にロッド自体が傾動することから、ブーツには、ロッドが倒れた側では縮み、反対側では伸びるという具合に繰り返し加重が加わり、ストレスによりブーツの耐久性が低下するという問題があった。   However, in the structure provided with the boot described above, in order to provide the boot locking device, the shape of the actuator case itself is changed to make the locking device, or a dedicated locking device made of rubber or the like is added. This is not only complicated, but also expensive. In addition, this type of actuator may be attached with the rod tilted as described above, and an unbalanced load may already be applied to the boot in the attached state. Furthermore, since the rod itself tilts, the boot has a problem that the boot is shrunk on the side where the rod is collapsed and is stretched on the opposite side.

この発明は、上述した問題を解消するためになされたものであり、軸方向に移動し、かつ傾動するロッド(軸)を支持する軸受装置として、部品点数が少なく、構造が簡素化でコストの低減が図れ、かつ耐久性の高いものを提供することを目的とする。   The present invention has been made to solve the above-described problems, and as a bearing device for supporting a rod (shaft) that moves in an axial direction and tilts, the number of parts is small, the structure is simplified, and the cost is reduced. An object is to provide a highly durable product that can be reduced.

この発明に係る軸受装置は、軸を軸方向に摺動可能かつ傾動可能に支持する軸受部材を備えた軸受装置において、前記軸受部材はOリングを介し軸受ホルダに対し傾動可能に弾性支持され、前記軸を覆うブーツの一端部を前記軸受部材にブーツ係止部を介し支承し、前記ブーツの他端部を前記軸に直接支承すると共に、ブーツ係止部の軸貫通部は径が緩やかに大きくなっているものである。 Bearing device according to the present invention is a bearing device having a bearing member for supporting axes to be slidable and tiltable in the axial direction, the bearing member is tiltably resiliently supported with respect bearing holder through an O-ring, One end of the boot covering the shaft is supported on the bearing member via a boot locking portion, the other end of the boot is directly supported on the shaft, and the shaft through portion of the boot locking portion has a gentle diameter. It's getting bigger .

この発明に係る軸受装置によれば、軸を軸方向に摺動可能かつ傾動可能に支持する軸受部材を備えた軸受装置において、前記軸受部材はOリングを介し軸受ホルダに対し傾動可能に弾性支持され、前記軸を覆うブーツの一端部を前記軸受部材にブーツ係止部を介し支承し、前記ブーツの他端部を前記軸に直接支承すると共に、ブーツ係止部の軸貫通部は径が緩やかに大きくしたので、ブーツを支持するための特別の部材を設ける必要がなく、構造が簡素化されると共に部品点数が減少し、製造コストの低減が達成できる。また、軸の傾動に伴い、ブーツが軸受部材と共に軸の傾動に追随するので、ブーツに偏荷重がかからなくなり、ブーツの耐久性が大幅に向上する。
According to the bearing device of the present invention, in the bearing device including the bearing member that supports the shaft so as to be slidable and tiltable in the axial direction, the bearing member is elastically supported so as to be tiltable with respect to the bearing holder via the O-ring. One end of the boot covering the shaft is supported on the bearing member via a boot locking portion, the other end of the boot is directly supported on the shaft, and the shaft through portion of the boot locking portion has a diameter. Since the size is increased gradually, it is not necessary to provide a special member for supporting the boot, the structure is simplified, the number of parts is reduced, and the manufacturing cost can be reduced. Further, as the shaft tilts, the boot follows the shaft tilt together with the bearing member, so that the load is not applied to the boot, and the durability of the boot is greatly improved.

以下、本発明に係る軸受装置の実施の形態を、図面を参照しながら詳細に説明する。
実施の形態1.
図1は、本発明の実施の形態1に係る軸受装置を適用したアクチュエータの断面図である。図2は、その一部の拡大図、図3は、軸受装置の作用を示す図2と同じ部分の断面図である。
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a bearing device according to the present invention will be described in detail with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a cross-sectional view of an actuator to which a bearing device according to Embodiment 1 of the present invention is applied. FIG. 2 is an enlarged view of a part thereof, and FIG. 3 is a cross-sectional view of the same part as FIG. 2 showing the operation of the bearing device.

先ず、アクチュエータの構成について説明する。
このアクチュエータ1は、例えばリンク機構などを介してターボチャージャのゲートバルブを開閉する駆動原として用いられる。アクチュエータ1の外郭をなすハウジング(ケース)2は、二つの容器状のハウジング部材2a、2bを結合して構成される。ハウジング2内にはダイヤフラム3が設けられ、このダイヤフラム3によってハウジング2内は圧力室4と大気室5とに区分けされる。ダイヤフラム3は、例えば二つのハウジング部材2a、2bをその縁部6、7同士で結合するときに、これらの縁部6、7間に挟み付けられて一体に結合される。
First, the configuration of the actuator will be described.
This actuator 1 is used as a driving source for opening and closing a gate valve of a turbocharger via a link mechanism or the like, for example. A housing (case) 2 that forms an outline of the actuator 1 is configured by connecting two container-like housing members 2a and 2b. A diaphragm 3 is provided in the housing 2, and the inside of the housing 2 is divided into a pressure chamber 4 and an atmospheric chamber 5 by the diaphragm 3. For example, when the two housing members 2a and 2b are joined together at the edges 6 and 7, the diaphragm 3 is sandwiched between the edges 6 and 7 and joined together.

ダイヤフラム3の圧力室4側にはスプリングホルダ8が取り付けられ、このスプリングホルダ8とそれに対向するハウジング部材2aの壁面9(図1に示す状態では天井面)との間に、ダイヤフラム3にばね力を付与するスプリング10が設けられている。ハウジング部材2aには、圧力室4に負圧を形成させる負圧源に配管を介して接続するための配管接続部11が設けられている。   A spring holder 8 is attached to the diaphragm 3 on the pressure chamber 4 side, and a spring force is applied to the diaphragm 3 between the spring holder 8 and the wall surface 9 (the ceiling surface in the state shown in FIG. 1) of the housing member 2a. A spring 10 is provided. The housing member 2a is provided with a pipe connection portion 11 for connecting to a negative pressure source for forming a negative pressure in the pressure chamber 4 via a pipe.

大気室5側を形成するハウジング部材2bの、ダイヤフラム3と対向する壁面(図1に示す状態では底面)には凹部12が形成されている。ダイヤフラム3にはロッド(軸)13の一端が結合され、ロッド13の他端側は凹部12の底に設けられた孔14を通してハウジング2外に伸びている。ロッド13の他端部13aは、リンク機構などを介してターボチャージャのゲートバルブに結合される。   A recess 12 is formed on the wall surface (bottom surface in the state shown in FIG. 1) of the housing member 2 b that forms the atmosphere chamber 5 side and faces the diaphragm 3. One end of a rod (shaft) 13 is coupled to the diaphragm 3, and the other end of the rod 13 extends out of the housing 2 through a hole 14 provided in the bottom of the recess 12. The other end 13a of the rod 13 is coupled to a turbocharger gate valve via a link mechanism or the like.

以上の構成となっていることにより、圧力室4に負圧がかかっていない状態では、スプリング10のばね力によりダイヤフラム3は大気室5側に押された状態となる。圧力室4に負圧がかかると、ダイヤフラム3がスプリング10のばね力に抗して圧力室4側に引っ張られ、ロッド13が移動(図1に示す状態では上方に移動)される。よって、ロッド13にリンク機構等を介して連結されているゲートバルブは開閉動される。   Due to the above configuration, when no negative pressure is applied to the pressure chamber 4, the diaphragm 3 is pushed toward the atmosphere chamber 5 by the spring force of the spring 10. When negative pressure is applied to the pressure chamber 4, the diaphragm 3 is pulled toward the pressure chamber 4 against the spring force of the spring 10, and the rod 13 is moved (moved upward in the state shown in FIG. 1). Therefore, the gate valve connected to the rod 13 via the link mechanism or the like is opened and closed.

このようなアクチュエータ1において、ハウジング2におけるロッド13が貫通する部分であるハウジング部材2bの底部に、ロッド13の軸方向移動を案内すると共にその傾動を許容する軸受部を備え、かつ軸受部の防汚、防水する、本発明に係る軸受装置21が設けられている。   In such an actuator 1, the bottom part of the housing member 2b in which the rod 13 in the housing 2 penetrates is provided with a bearing part that guides the axial movement of the rod 13 and allows its tilting, and prevents the bearing part. A bearing device 21 according to the present invention that is soiled and waterproof is provided.

図1、2に示すように、ハウジング部材2bの凹部12内に、軸受部を構成する軸受部材として環状のロッド支持部材22が設けられ、このロッド支持部材22にロッド13が貫通して支持されている。ロッド支持部材22は、凹部12内に収まる環状の軸受本体部23と、軸受本体部23と一体に形成され、凹部12の底部に設けられた孔14からハウジング2外に延びるブーツ係止部24とからなる。ブーツ係止部24は筒状をなし、その内面は、ハウジング2外に行くにしたがって径がゆるやかに大きくなる湾曲面又はテーパ面となっている。ブーツ係止部24の端部(図1に示す状態では下端部)の外周には、その断面形状が鉤状となったフック部24aが形成されている。ロッド支持部材22は、例えば樹脂材で成形される。なお、凹部12に設けた孔14は、後述するようにロッド支持部材22の傾動を許容するように、ブーツ係止部24の外径より大きい内径となっている。   As shown in FIGS. 1 and 2, an annular rod support member 22 is provided as a bearing member constituting the bearing portion in the recess 12 of the housing member 2b, and the rod 13 penetrates and is supported by the rod support member 22. ing. The rod support member 22 includes an annular bearing body 23 that fits in the recess 12, and a boot locking portion 24 that is formed integrally with the bearing body 23 and extends out of the housing 2 through a hole 14 provided in the bottom of the recess 12. It consists of. The boot locking portion 24 has a cylindrical shape, and its inner surface is a curved surface or a tapered surface whose diameter gradually increases as it goes out of the housing 2. On the outer periphery of the end portion of the boot locking portion 24 (the lower end portion in the state shown in FIG. 1), a hook portion 24a having a hook-like cross section is formed. The rod support member 22 is formed of, for example, a resin material. The hole 14 provided in the recess 12 has an inner diameter larger than the outer diameter of the boot locking portion 24 so as to allow the rod support member 22 to tilt as will be described later.

ロッド支持部材22は、カップ状のホルダ25によりハウジング2bの凹部12内に上下動しないように保持される。カップ状のホルダ25は折り返し部25aを有し、この折り返し部25aを凹部12に圧入することにより、ホルダ25は凹部12に固定される。折り返し部25aは、必要に応じ凹部12の内壁面に溶接、ろう付けなどにより固定される。ホルダ25のロッド13が貫通する部分(図1に示す状態では頂面部分)には孔25bが設けられており、この孔25bは、ロッド13の傾動を許容できるように、ロッド13の外径より大きい内径となっている。   The rod support member 22 is held by the cup-shaped holder 25 so as not to move up and down in the recess 12 of the housing 2b. The cup-shaped holder 25 has a folded portion 25 a, and the holder 25 is fixed to the recessed portion 12 by press-fitting the folded portion 25 a into the recessed portion 12. The folded portion 25a is fixed to the inner wall surface of the recess 12 by welding, brazing, or the like as necessary. A hole 25b is provided in a portion of the holder 25 through which the rod 13 passes (the top surface portion in the state shown in FIG. 1). The hole 25b has an outer diameter of the rod 13 so that the rod 13 can be tilted. The inner diameter is larger.

ロッド支持部材22の軸受本体部23の外周面には、リング状の溝23aが形成され、その中にホルダ25の内面に密着するOリング26が嵌め込まれている。つまり、ロッド支持部材22は、Oリング26を介してホルダ25に対し傾動可能に弾性支持されている。Oリング26はゴムなどの弾力性のある材料により作られている。   A ring-shaped groove 23 a is formed on the outer peripheral surface of the bearing main body 23 of the rod support member 22, and an O-ring 26 that is in close contact with the inner surface of the holder 25 is fitted therein. That is, the rod support member 22 is elastically supported by the holder 25 via the O-ring 26 so as to be tiltable. The O-ring 26 is made of an elastic material such as rubber.

ゴム等で製作され蛇腹状のブーツ31がロッド13にかぶせられる。ブーツ31のハウジング2側の端部の径方向内側には凹状のフック部32が設けられ、このフック部32が、ブーツ係止部24のフック部24aと係合されることにより、ブーツ31はブーツ係止部24と一体とされる。ブーツ31のフック部32はロッド支持部材22側のフック部24と密着して係合され、ブーツ31とロッド支持部材22間の気密性が担保される。ブーツ31の他端部は取り付け部33となっており、その弾性力によりロッド13に密着して一体となる。   A bellows-like boot 31 made of rubber or the like is placed on the rod 13. A concave hook portion 32 is provided on the radially inner side of the end portion of the boot 31 on the housing 2 side, and the hook portion 32 is engaged with the hook portion 24 a of the boot locking portion 24. The boot locking portion 24 is integrated. The hook portion 32 of the boot 31 is brought into close contact with and engaged with the hook portion 24 on the rod support member 22 side, and the airtightness between the boot 31 and the rod support member 22 is ensured. The other end portion of the boot 31 is an attachment portion 33, which is brought into close contact with the rod 13 by the elastic force and integrated.

軸受装置21は以上の構成となっており、前述のように圧力室4に負圧がかかり、ダイヤフラム3が移動してロッド13がその軸方向に移動する際、ロッド13の移動はロッド支持部材22により案内される。ロッド13とロッド支持部材22のブーツ係止部24との間にブーツ31が気密性をもって設けられているので、ロッド支持部材22によりロッド13の支持部に塵埃や水が侵入することはない。   The bearing device 21 has the above-described configuration. When the negative pressure is applied to the pressure chamber 4 as described above and the diaphragm 3 moves and the rod 13 moves in the axial direction, the rod 13 moves in the rod support member. 22 to guide. Since the boot 31 is airtightly provided between the rod 13 and the boot locking portion 24 of the rod support member 22, dust and water do not enter the support portion of the rod 13 by the rod support member 22.

ロッド13の先端にリンク機構等が連結されていることにより、ロッド13がその軸方向に移動する際、ロッド13は、ロッド13の支持点であるダイヤフラム3との取り付け部を中心として図3中に矢印で示すように傾動する。この際、ロッド支持部材22もロッド13に追随して傾くので、ブーツ31に偏荷重がかかることはない。ロッド13の傾動は、アクチュエータ1が取り付け箇所に傾いて取り付けられることによっても生じるが、その場合のロッド13の傾動に対してもロッド支持部材22は同様に機能し、ブーツ31に偏荷重がかかることはない。   When the rod 13 moves in the axial direction by connecting a link mechanism or the like to the tip of the rod 13, the rod 13 is centered on the attachment portion with the diaphragm 3 that is a support point of the rod 13 in FIG. 3. Tilt as shown by the arrows. At this time, since the rod support member 22 also tilts following the rod 13, an unbalanced load is not applied to the boot 31. The tilting of the rod 13 also occurs when the actuator 1 is tilted and attached to the mounting location. However, the rod support member 22 functions in the same manner with respect to the tilting of the rod 13 in that case, and an uneven load is applied to the boot 31. There is nothing.

このように、この実施の形態による軸受装置21によれば、ロッド支持部材22自体にブーツ31との係合部であるブーツ係止部24を設けて、ブーツ係止部24がロッド13に追随して傾動するようにしたので、アクチュエータの構造を変更したり特別な部品を設けたりする必要がなくなる。また、部品点数が減り、構造が簡素化され、製造コストの低減が図れる。更に、ブーツ31に偏荷重がかかることがなくなり、ブーツ31に、収縮の違いによるひずみが生ぜず、ブーツ31の寿命が増す。この実施の形態では、ロッド支持部材22を樹脂製としたことにより、型を用いた一体成形が可能となり、工程数の低減、材料費の低減等により、コストの削減が図れる。   As described above, according to the bearing device 21 according to this embodiment, the rod support member 22 itself is provided with the boot locking portion 24 that is the engagement portion with the boot 31, and the boot locking portion 24 follows the rod 13. Therefore, it is not necessary to change the structure of the actuator or provide special parts. Further, the number of parts is reduced, the structure is simplified, and the manufacturing cost can be reduced. Further, the load is not applied to the boot 31, and the boot 31 is not distorted due to a difference in contraction, and the life of the boot 31 is increased. In this embodiment, since the rod support member 22 is made of resin, it is possible to perform integral molding using a mold, and the cost can be reduced by reducing the number of processes and material costs.

実施の形態2.
図4には実施の形態2に係る軸受装置41の部分断面を示す。この軸受装置41におけるロッド支持部材42は、環状の軸受本体部43にハウジング部材2bの孔14からわずかに外側に突出する程度の環状の凸部44を設けた構造となっている。一方、ブーツ31は、そのハウジング1側の端部にはフック部を設けず、厚肉の接続部45のみを形成してある。そして、この接続部45の端面とロッド支持部材42の凸部44の端面とが合わせられて一体化されている。一体化の方法としては、接着など種々の方法が採用できるが、この実施の形態では、焼付けにより一体化している。焼付けは、ロッド支持部材42をハウジング2b内に組み付ける前又は後のどちらにおいてもできる。ロッド支持部材42をハウジング2b内に組み付ける前にブーツ31と接合した場合には、そのロッド支持部材42とブーツ31との組み立て体をハウジング部材2bに組み付けるには、ハウジング部材2bの内側からブーツ31の取り付け部33を変形させて孔14に通し、軸受本体部43を凹部12内に収めることにより行う。
Embodiment 2. FIG.
FIG. 4 shows a partial cross section of the bearing device 41 according to the second embodiment. The rod support member 42 in the bearing device 41 has a structure in which an annular bearing main body 43 is provided with an annular convex portion 44 that protrudes slightly outward from the hole 14 of the housing member 2b. On the other hand, the boot 31 is not provided with a hook portion at the end on the housing 1 side, and only the thick connection portion 45 is formed. And the end surface of this connection part 45 and the end surface of the convex part 44 of the rod support member 42 are match | combined, and are integrated. As an integration method, various methods such as adhesion can be adopted, but in this embodiment, the integration is performed by baking. The baking can be performed either before or after the rod support member 42 is assembled in the housing 2b. When the rod support member 42 is joined to the boot 31 before being assembled in the housing 2b, the assembly of the rod support member 42 and the boot 31 is assembled to the housing member 2b from the inside of the housing member 2b. The mounting portion 33 is deformed and passed through the hole 14, and the bearing main body portion 43 is accommodated in the recess 12.

この実施の形態2に係る軸受装置41よれば、前述した実施の形態1に係る軸受装置21と同様の作用効果を奏するだけでなく、ロッド支持部材42、ブーツ31の形状が極めて簡素化されることから、製造コストを更に低減できる。   According to the bearing device 41 according to the second embodiment, not only the effects similar to those of the bearing device 21 according to the first embodiment described above but also the shapes of the rod support member 42 and the boot 31 are greatly simplified. Therefore, the manufacturing cost can be further reduced.

実施の形態3.
図5には、実施の形態3に係る軸受装置51の部分断面を示す。この軸受装置51におけるロッド支持部材52は、図1、2に示した実施の形態と同様に、環状の軸受本体部53と筒状のブーツ係止部54を有し、ブーツ係止部54の先端外側にはフック部54aを有する。そして、ブーツ係止部54の根元近くに、ハウジング部材2bの孔14の縁部15の下面に係合し得る係止爪部55が設けられる。ロッド支持部材52は樹脂材により成形される。
Embodiment 3 FIG.
In FIG. 5, the partial cross section of the bearing apparatus 51 which concerns on Embodiment 3 is shown. The rod support member 52 in the bearing device 51 has an annular bearing body 53 and a cylindrical boot locking portion 54, as in the embodiment shown in FIGS. A hook portion 54a is provided on the outer end of the tip. A locking claw portion 55 that can engage with the lower surface of the edge 15 of the hole 14 of the housing member 2b is provided near the base of the boot locking portion 54. The rod support member 52 is formed of a resin material.

ロッド支持部材52は、その係止爪部55が孔14の縁部15の下面に当たることにより上方への抜け止めがなされる。従って、実施の形態1で、ロッド支持部材22を保持するために必要であったホルダ25が不要となる。ホルダ25が不要となるので、軸受本体部53の外周面の溝53a内に設けられたOリング26は、ハウジング部材2bの凹部12の内壁面に密着される。つまり、ロッド支持部材52は、Oリング26を介してハウジング部材2bに対し傾動可能に弾性支持される。   The rod support member 52 is prevented from coming off upward when the locking claw portion 55 hits the lower surface of the edge portion 15 of the hole 14. Accordingly, the holder 25 that is necessary for holding the rod support member 22 in the first embodiment is not necessary. Since the holder 25 is not required, the O-ring 26 provided in the groove 53a on the outer peripheral surface of the bearing body 53 is in close contact with the inner wall surface of the recess 12 of the housing member 2b. That is, the rod support member 52 is elastically supported by the housing member 2b via the O-ring 26 so as to be tiltable.

ブーツ31の端部には、図1、2に示した実施の形態と同様にフック部32が形成されている。よって、このフック部32が、ブーツ係止部54のフック部54aと係合されることにより、ブーツ31はブーツ係止部54と一体とされる。ブーツ31のフック部32はロッド支持部材52側のフック部54と密着して係合され、ブーツ31とロッド支持部材52間の気密性が確保される。   A hook portion 32 is formed at the end of the boot 31 as in the embodiment shown in FIGS. Therefore, when the hook portion 32 is engaged with the hook portion 54 a of the boot locking portion 54, the boot 31 is integrated with the boot locking portion 54. The hook portion 32 of the boot 31 is brought into close contact with and engaged with the hook portion 54 on the rod support member 52 side, and airtightness between the boot 31 and the rod support member 52 is ensured.

この実施の形態3に係る軸受装置51では、ロッド13が傾動すると、ロッド支持部材52及びロッド支持部材52と一体化されているブーツ31も追随して傾く。よって、ブーツ31に偏荷重はかからない。   In the bearing device 51 according to the third embodiment, when the rod 13 tilts, the rod support member 52 and the boot 31 integrated with the rod support member 52 also follow and tilt. Therefore, an uneven load is not applied to the boot 31.

この実施の形態3に係る軸受装置51によれば、実施の形態1に係る軸受装置21と同様の効果を奏するだけでなく、図1〜4に示した実施の形態で必要であったホルダが不要となることから、更に部品点数が少なくなると共に構造が簡素化され、更なるコストの低減が図れる。この実施の形態では、ロッド支持部材52を樹脂製としたことにより、型を用いた一体成形が可能となり、工程数の低減、材料費の低減等により、コストの削減が図れる。   According to the bearing device 51 according to the third embodiment, not only the same effect as the bearing device 21 according to the first embodiment is obtained, but also the holder required in the embodiment shown in FIGS. Since it becomes unnecessary, the number of parts is further reduced, the structure is simplified, and the cost can be further reduced. In this embodiment, since the rod support member 52 is made of resin, it is possible to perform integral molding using a mold, and the cost can be reduced by reducing the number of processes and material costs.

実施の形態4.
図6には、実施の形態4に係る軸受装置61の部分断面を示す。この軸受装置61におけるロッド支持部材62は、図5に示した実施の形態3と同様の構造をなす。つまり、環状の軸受本体部63と筒状のブーツ係止部64を有し、ブーツ係止部64の先端外側にはフック部64aを有し、ブーツ係止部64の根元近くには、ハウジング部材2bの孔14の縁部15の下面に係合する係止爪部65が設けられる。ロッド支持部材62は、その係止爪部65が孔14の縁部15の下面に当たることにより上方への抜け止めがなされる。ロッド支持部材62は樹脂材により成形される。
Embodiment 4 FIG.
In FIG. 6, the partial cross section of the bearing apparatus 61 which concerns on Embodiment 4 is shown. The rod support member 62 in the bearing device 61 has the same structure as that of the third embodiment shown in FIG. That is, it has an annular bearing body 63 and a cylindrical boot locking portion 64, a hook portion 64 a is provided on the outer end of the boot locking portion 64, and a housing near the base of the boot locking portion 64. A locking claw portion 65 that engages with the lower surface of the edge portion 15 of the hole 14 of the member 2b is provided. The rod support member 62 is prevented from coming off upward when the locking claw portion 65 hits the lower surface of the edge portion 15 of the hole 14. The rod support member 62 is formed of a resin material.

この実施の形態4に係る軸受装置61では、ブーツ31の端部にフック部32が設けられていることは、図5に示した実施の形態と同じであるが、更にブーツ31のハウジング部材2b側の端面に、ハウジング部材2bの縁部15の下面15aに当接する突起部66が設けられる。ブーツ31は、そのフック部32をフック係止部64のフック部64aに係合させることによりロッド支持部材62と一体化される。そして、このようにブーツ31とロッド支持部材62とが一体化されると、突起部66が孔14の縁部15の下面15aに当たる。ロッド支持部材62は、突起部66と軸受本体部63の底面63aが孔14の縁部15を挟むことによりハウジング部材2bに傾動可能に支持される。   In the bearing device 61 according to the fourth embodiment, the hook portion 32 is provided at the end of the boot 31 as in the embodiment shown in FIG. On the side end face, a protrusion 66 is provided that contacts the lower surface 15a of the edge 15 of the housing member 2b. The boot 31 is integrated with the rod support member 62 by engaging the hook portion 32 with the hook portion 64 a of the hook locking portion 64. Then, when the boot 31 and the rod support member 62 are integrated as described above, the protrusion 66 hits the lower surface 15 a of the edge 15 of the hole 14. The rod support member 62 is supported by the housing member 2b such that the protrusion 66 and the bottom surface 63a of the bearing body 63 sandwich the edge 15 of the hole 14 so as to be tiltable.

ロッド13が傾動すると、ロッド13が傾動する側の突起部66が弾性変形してロッド13と共にロッド支持部材62及びブーツ13も傾動する。よって、ブーツ13自体に偏荷重はほとんどかからない。   When the rod 13 tilts, the projection 66 on the side on which the rod 13 tilts is elastically deformed, and the rod support member 62 and the boot 13 are tilted together with the rod 13. Therefore, an uneven load is hardly applied to the boot 13 itself.

この実施の形態4に係る軸受装置61によれば、他の実施の形態に係る軸受装置と同様の効果を奏するだけでなく、ロッド支持部材を傾動可能に支持するOリングが不要となることから、更に部品点数が少なくなると共に構造が簡素化され、更なるコストの低減が図れる。この実施の形態でも、ロッド支持部材62を樹脂製としたことにより、型を用いた一体成形が可能となり、工程数の低減、材料費の低減等により、コストの削減が図れる。   According to the bearing device 61 according to the fourth embodiment, not only an effect similar to that of the bearing device according to another embodiment but also an O-ring that supports the rod support member in a tiltable manner is not necessary. Further, the number of parts is further reduced, the structure is simplified, and the cost can be further reduced. Also in this embodiment, since the rod support member 62 is made of resin, it is possible to perform integral molding using a mold, and the cost can be reduced by reducing the number of processes and material costs.

実施の形態5.
図7には、実施の形態5に係る軸受装置71の部分断面を示す。この軸受装置71におけるロッド支持部材72は、中央側に凹部73を有する軸受本体部材74と、この軸受本体部材74と別材料で形成され、基端部が凹部73に嵌め込まれた状態で軸受本体部材74と一体的に接合される筒状のブーツ係止部材75とからなる。ブーツ係止部材75の内面には、先端に行くに従って広がるわずかな湾曲又はテーパが付けられている。ブーツ係止部材75の先端外周にはフック部76が形成されている。ブーツ係止部材75は、軸受本体部材74と同一の材料でもよいが、少なくともブーツ31の材料であるゴムよりも硬い材料で形成される。
Embodiment 5 FIG.
In FIG. 7, the partial cross section of the bearing apparatus 71 which concerns on Embodiment 5 is shown. The rod support member 72 in the bearing device 71 is formed of a bearing main body member 74 having a concave portion 73 on the center side and a material different from the bearing main body member 74, and a base end portion is fitted in the concave portion 73. It comprises a cylindrical boot locking member 75 that is integrally joined to the member 74. The inner surface of the boot locking member 75 has a slight curve or taper that widens toward the tip. A hook portion 76 is formed on the outer periphery of the front end of the boot locking member 75. The boot locking member 75 may be made of the same material as that of the bearing main body member 74, but is formed of a material harder than rubber that is at least the material of the boot 31.

一方、ブーツ31の端部には内側に向けてフランジ部77が形成され、その表面にリング状の突起部78が形成される。   On the other hand, a flange portion 77 is formed at the end of the boot 31 inward, and a ring-shaped projection 78 is formed on the surface thereof.

この軸受装置71は、先ず、軸受本体部材74を凹部12内に収容して縁部15上に載置し、次いで、ブーツ31のフランジ部77の内側面にフック部76を当接させたブーツ係止部材75の基端部をハウジング部材2bの孔14を通して軸受本体部材74の凹部73に嵌め込み、その状態で軸受本体部材74とブーツ係止部材75とを接着等により一体化することにより構成される。ブーツ31の端部にある突起部78は、ブーツ係止部材75のフック部76とハウジング部材2bの縁部15の下面15aとにより挟み付けられる。つまり、ロッド支持部材72は、軸受本体部材74の底面74aとで縁部15を挟み付けている突起部78が弾性変形可能であることにより、傾動可能となっている。突起部78を裏側から支えるフック部76は、ブーツ31より硬い材料で形成されているので、突起部78の弾性保持力は安定する。   In this bearing device 71, first, a bearing body member 74 is accommodated in the recess 12 and placed on the edge portion 15, and then a boot portion with a hook portion 76 abutting against the inner surface of the flange portion 77 of the boot 31. The base end portion of the locking member 75 is fitted into the recess 73 of the bearing body member 74 through the hole 14 of the housing member 2b, and the bearing body member 74 and the boot locking member 75 are integrated by bonding or the like in this state. Is done. The protrusion 78 at the end of the boot 31 is sandwiched between the hook portion 76 of the boot locking member 75 and the lower surface 15a of the edge 15 of the housing member 2b. That is, the rod support member 72 can be tilted by the elastic deformation of the projecting portion 78 sandwiching the edge portion 15 with the bottom surface 74a of the bearing body member 74. Since the hook portion 76 that supports the protrusion 78 from the back side is formed of a material harder than the boot 31, the elastic holding force of the protrusion 78 is stabilized.

この実施の形態において、ブーツ係止部材75と軸受本体部材74との接合方法は、接着剤による接着だけでなく、圧入、溶着など、いずれの方法も可能である。   In this embodiment, the boot locking member 75 and the bearing body member 74 can be joined by any method such as press-fitting and welding as well as bonding with an adhesive.

この軸受装置71によれば、ロッド13が傾けば、突起部78が弾性変形してロッド支持部材72及びブーツ31は、その傾きに追随する。つまり、他の実施の形態と同様、ブーツ31の倒れ角は常にロッド13の倒れ角と同じとなり、ブーツ31に偏荷重はかからない。   According to this bearing device 71, when the rod 13 is inclined, the projection 78 is elastically deformed, and the rod support member 72 and the boot 31 follow the inclination. That is, as in the other embodiments, the tilt angle of the boot 31 is always the same as the tilt angle of the rod 13, and no unbalanced load is applied to the boot 31.

この実施の形態5に係る軸受装置によれば、実施の形態4と同様の効果を奏するだけでなく、突起部78をその裏側から硬いフック部76で支えることから、突起部78のゴム弾性が有効に発揮される。   According to the bearing device according to the fifth embodiment, not only has the same effect as the fourth embodiment, but also the protrusion 78 is supported by the hard hook 76 from the back side, so that the rubber elasticity of the protrusion 78 is increased. Effectively demonstrated.

以上、各実施の形態を説明したが、本発明に係る軸受装置は、軸方向に移動し、かつ傾きもする軸を支持する軸受すべてに適用でき、ロッド支持部材とブーツとの結合構造も、上述の実施の形態に限らず種々採用できる。また、アクチュエータに適用した場合も、その向きは上下方向に設ける場合に限らず、横方向及びその他の向きで設置した場合にも適用できる。   Each embodiment has been described above, but the bearing device according to the present invention can be applied to all bearings that support the shaft that moves in the axial direction and also tilts, and the coupling structure of the rod support member and the boot is also The present invention is not limited to the above-described embodiment and can be variously adopted. In addition, when applied to an actuator, the direction is not limited to the vertical direction, but can be applied to a horizontal direction and other directions.

本発明に係る軸受装置の実施の形態1を適用したアクチュエータの縦断面図である。It is a longitudinal cross-sectional view of the actuator to which Embodiment 1 of the bearing apparatus which concerns on this invention is applied. 図1中のII部の部分拡大図である。It is the elements on larger scale of the II section in FIG. 図1に示した実施の形態1における図2に示した部分の動作説明図である。FIG. 3 is an operation explanatory diagram of the portion shown in FIG. 2 in the first embodiment shown in FIG. 1. 本発明の実施の形態2に係る軸受装置の部分断面図である。It is a fragmentary sectional view of the bearing apparatus which concerns on Embodiment 2 of this invention. 本発明の実施の形態3に係る軸受装置の部分断面図である。It is a fragmentary sectional view of the bearing apparatus which concerns on Embodiment 3 of this invention. 本発明の実施の形態4に係る軸受装置の部分断面図である。It is a fragmentary sectional view of the bearing apparatus which concerns on Embodiment 4 of this invention. 本発明の実施の形態5に係る軸受装置の部分断面図である。It is a fragmentary sectional view of the bearing apparatus which concerns on Embodiment 5 of this invention.

符号の説明Explanation of symbols

1 アクチュエータ、2 ハウジング、3 ダイヤフラム、13 ロッド、14 孔、21 軸受装置、23 軸受本体部、24 ブーツ係止部、24a フック部、25 ホルダ、26 Oリング、31 ブーツ、32 フック部、41 軸受装置、42 ロッド支持部材、43 軸受本体部、51 軸受装置、52 ロッド支持部材、53 軸受本体部、54 ブーツ係止部、55 係止爪部、61 軸受装置、62 ロッド支持部材、63 軸受本体部、64 ブーツ係止部、65 係止爪部、66 突起部、71 軸受装置、72 ロッド支持部材、74 軸受本体部、78 突起部。
DESCRIPTION OF SYMBOLS 1 Actuator, 2 Housing, 3 Diaphragm, 13 Rod, 14 Hole, 21 Bearing apparatus, 23 Bearing main-body part, 24 Boot latching part, 24a Hook part, 25 Holder, 26 O-ring, 31 Boot, 32 Hook part, 41 Bearing Device, 42 Rod support member, 43 Bearing body portion, 51 Bearing device, 52 Rod support member, 53 Bearing body portion, 54 Boot locking portion, 55 Locking claw portion, 61 Bearing device, 62 Rod support member, 63 Bearing body Part, 64 boot locking part, 65 locking claw part, 66 projection part, 71 bearing device, 72 rod support member, 74 bearing body part, 78 projection part.

Claims (6)

軸を軸方向に摺動可能かつ傾動可能に支持する軸受部材を備えた軸受装置において、前記軸受部材はOリングを介し軸受ホルダに対し傾動可能に弾性支持され、前記軸を覆うブーツの一端部を前記軸受部材にブーツ係止部を介し支承し、前記ブーツの他端部を前記軸に直接支承すると共に、ブーツ係止部の軸貫通部は径が緩やかに大きくなっていることを特徴とする軸受装置。 In the bearing device having a bearing member for slidably and tiltably supported in the axial direction of the shaft, the bearing member is tiltably resiliently supported with respect bearing holder via an O-ring, one end portion of the boot covering the shaft was supported through the boot locking portion to the bearing member, the other end portion of the boot as well as supported directly on said shaft, and wherein the shaft penetrating portion of the boot engagement portion whose diameter becomes gradually larger Bearing device. 前記ブーツ支承部は前記軸受部材と一体に構成されることを特徴とする請求項に記載の軸受装置。 The bearing device according to claim 1 , wherein the boot support portion is configured integrally with the bearing member. 前記軸受部材は樹脂材で成形されることを特徴とする請求項1または2に記載の軸受装置。 The bearing member is a bearing device according to claim 1 or 2, characterized in that it is formed of resin material. 前記軸受部材に、前記軸受部材を保持するハウジングに当接し得る爪部を設け、前記爪部が前記ハウジングに当接することにより前記軸受部材の軸方向への移動を規制したことを特徴とする請求項1から請求項のうちのいずれか1項に記載の軸受装置。 The claw part which can contact the housing which holds the bearing member is provided in the bearing member, and the movement to the axial direction of the bearing member is controlled when the claw part contacts the housing. The bearing device according to any one of claims 1 to 3 . 前記ブーツの端部に、前記ハウジングの外面に当接する突起部を設け、前記突起部の弾性変形により前記軸受部材の傾動を許容するようにしたことを特徴とする請求項に記載の軸受装置。 The bearing device according to claim 4 , wherein a protrusion that abuts the outer surface of the housing is provided at an end of the boot, and the tilting of the bearing member is allowed by elastic deformation of the protrusion. . 前記ブーツ係止部を別部材とし、このブーツ係止部材で前記ブーツの端部を支承すると共に、前記突起部を前記ハウジングの外面に押し付けて前記ブーツ係止部材を前記軸受部材と接合してなることを特徴とする請求項に記載の軸受装置。 The boot locking portion is a separate member, and the boot locking member supports the end of the boot, and the protrusion is pressed against the outer surface of the housing to join the boot locking member to the bearing member. The bearing device according to claim 5 , wherein
JP2006161226A 2006-06-09 2006-06-09 Bearing device Expired - Fee Related JP4855151B2 (en)

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JP5887309B2 (en) * 2013-07-25 2016-03-16 株式会社ユタカ技研 Thermo actuator
JP6849002B2 (en) * 2018-05-14 2021-03-24 Jfeスチール株式会社 Drive shaft protection structure

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CN104344064B (en) * 2013-07-25 2019-01-04 株式会社丰技研 Heat-exchange apparatus

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