JP5061080B2

JP5061080B2 - Anti-vibration bush

Info

Publication number: JP5061080B2
Application number: JP2008258866A
Authority: JP
Inventors: 公雄岡本
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2008-10-03
Filing date: 2008-10-03
Publication date: 2012-10-31
Anticipated expiration: 2028-10-03
Also published as: JP2010090922A

Description

本発明は、例えば、自動車のサスペンション装置等に組み込まれる防振ブッシュに関する。 The present invention relates to an anti-vibration bush incorporated into, for example, a suspension device of an automobile.

従来から、例えば、自動車のサスペンション装置等において、車体とサスペンション構成部品との連結部位、具体的には、車輪を車体に対して回転自在に支持するロアアームの車体取付部位に防振ブッシュが用いられている。この防振ブッシュは、前記ロアアームと車体とを防振的に結合することにより、車体に対する振動の減衰作用や緩衝作用を営むものである。前記防振ブッシュは、一般的に、芯部材（内筒）と、前記芯部材の外側に所定間隔離間して外嵌されるロアアームの取付筒部（外筒）と、前記芯部材と取付筒部との間に介装されて両者を弾性的に結合するゴム状の弾性体とから構成される。 Conventionally, for example, in an automobile suspension device or the like, an anti-vibration bush has been used in a connection part between a vehicle body and a suspension component, specifically, a vehicle body attachment part of a lower arm that rotatably supports a wheel with respect to the vehicle body. ing. This anti-vibration bushing has a vibration-damping action and a buffering action for the vehicle body by coupling the lower arm and the vehicle body in an anti-vibration manner. The anti-vibration bush is generally composed of a core member (inner cylinder), a lower arm mounting cylinder part (outer cylinder) that is fitted outside the core member at a predetermined interval, and the core member and mounting cylinder. And a rubber-like elastic body that is interposed between the two portions and elastically couples them.

この種の防振ブッシュに対し、例えば、特許文献１には、芯部材の軸方向に沿った両端部にそれぞれストッパを設け、前記ストッパによって取付筒部の軸方向の移動を規制する防振ブッシュが開示されている。 In contrast to this type of anti-vibration bush, for example, Patent Document 1 discloses that the anti-vibration bush is provided with stoppers at both ends along the axial direction of the core member, and the axial movement of the mounting cylinder is restricted by the stopper. Is disclosed.

この特許文献１に開示された防振ブッシュでは、芯部材の軸方向に沿った一端部側に、芯部材と一体成形されて半径外方向に向かって突出するストッパフランジを設けると共に、芯部材の軸方向に沿った他端部側に、前記芯部材の外周面に対して圧入して固定された円板状のストッパリングを設ける構成が採用されている。
特開２００３−２９４０８４号公報 In the anti-vibration bush disclosed in Patent Document 1, a stopper flange that is integrally formed with the core member and protrudes radially outward is provided on one end side along the axial direction of the core member. A configuration is employed in which a disc-shaped stopper ring is press-fitted and fixed to the outer peripheral surface of the core member on the other end side along the axial direction.
JP 2003-294084 A

しかしながら、前記特許文献１に開示された防振ブッシュでは、ロアアームの取付筒部が芯部材の軸方向に沿って移動することにより圧入されたストッパリングに当接し、前記ストッパリングに対して軸方向の力が付与される。この結果、特許文献１に開示された防振ブッシュでは、ストッパリングを軸方向外側に押圧して脱落させるおそれがある。 However, in the anti-vibration bush disclosed in Patent Document 1, the mounting cylinder portion of the lower arm abuts against the press-fitted stopper ring by moving along the axial direction of the core member, and the axial direction relative to the stopper ring The power of is given. As a result, in the anti-vibration bush disclosed in Patent Document 1, the stopper ring may be pressed off in the axial direction and fall off.

また、特許文献１に開示された防振ブッシュでは、芯部材に対してストッパリングを圧入する工程が必要となり、防振ブッシュの組み付け作業が煩雑化する。 Moreover, in the vibration isolating bush disclosed in Patent Document 1, a step of press-fitting a stopper ring into the core member is required, and the work of assembling the vibration isolating bush becomes complicated.

本発明は、前記の点に鑑みてなされたものであり、芯部材からの取付筒部の脱落を好適に回避することができると共に、組み付け性を向上させることが可能な防振ブッシュを提供することを目的とする。 The present invention has been made in view of the above points, and provides an anti-vibration bushing that can suitably prevent the attachment cylinder portion from falling off the core member and can improve the assemblability. For the purpose.

前記の目的を達成するために、本発明は、車両のサブフレームに取り付けられる芯部材と、前記芯部材に外嵌しロアアームに連結された取付筒部とを有する防振ブッシュにおいて、前記芯部材の軸方向に沿った両端側に配置され、前記取付筒部の軸方向への移動を規制する一対の抜け止め部を備え、前記一対の抜け止め部の少なくとも一方は、前記サブフレームに設けられ、前記サブフレームのロアアーム取付部には、前記取付筒部が入り込む第１凹部が設けられ、前記取付筒部の軸方向に沿った一端部又は両端部と係合する前記第１凹部の内壁自体を抜け止め部とし、前記第１凹部には、前記取付筒部の一部分が入り込み、前記第１凹部の外側には、前記芯部材のボルト取付部が入り込む第２凹部が設けられることを特徴とする。 In order to achieve the above object, the present invention provides an anti-vibration bush including a core member attached to a subframe of a vehicle, and an attachment cylinder portion externally fitted to the core member and connected to a lower arm. And a pair of retaining portions that restrict movement of the mounting cylinder portion in the axial direction, and at least one of the pair of retaining portions is provided on the subframe. The lower arm mounting portion of the subframe is provided with a first recess into which the mounting tube portion is inserted, and the inner wall itself of the first recess that engages with one end portion or both end portions along the axial direction of the mounting tube portion. a retaining part, and wherein the first recess, enters the portion of the mounting cylinder portion, wherein the outer side of the first recess, wherein Rukoto second recess is provided a bolt mounting portion of the core member enters And

本発明によれば、取付筒部の軸方向への移動を規制する一対の抜け止め部のうち、少なくとも一方の抜け止め部をサブフレームに設けることにより、取付筒部を圧入する際に抜け止め部が邪魔となることがなく、しかも、芯部材に対してストッパリングを圧入する従来技術と比較して、取付筒部の軸方向への移動によって発生する軸方向の力（押圧力）がサブフレーム側の抜け止め部に作用した場合であっても芯部材から脱落する懸念がなく、取付筒部の抜け止め機能を確保することができる。また、本発明では、防振ブッシュの組み付け時に従来技術のような圧入工程を設けることが不要となるため、組み付け性を向上させることができる。 According to the present invention, among the pair of retaining portions for restricting the movement of the mounting cylinder portion in the axial direction, at least one retaining portion is provided in the subframe, so that the retaining tube portion is prevented from slipping when press-fitted. The axial force (pressing force) generated by the movement of the mounting cylinder in the axial direction is smaller than that of the conventional technique in which the stopper ring is press-fitted into the core member. Even when it acts on the retaining portion on the frame side, there is no fear of falling off the core member, and the retaining function of the mounting tube portion can be ensured. Moreover, in this invention, since it becomes unnecessary to provide the press-fit process like the prior art at the time of the assembly | attachment of a vibration proof bush, an assembly property can be improved.

さらに、本発明によれば、サブフレームのロアアーム取付部に、取付筒部が入り込む第１凹部を設け、前記取付筒部の軸方向に沿った一端部又は両端部と係合する前記第１凹部の内壁自体を抜け止め部とすることにより、簡素な構造によって抜け止め機能を発揮させることができ、部品点数を削減して製造コストを低減することができる。 Furthermore, according to the present invention, the first recess is provided in the lower arm mounting portion of the subframe so that the mounting tube portion enters, and is engaged with one end portion or both end portions along the axial direction of the mounting tube portion. By using the inner wall itself as a retaining portion, the retaining function can be exerted with a simple structure, and the number of components can be reduced and the manufacturing cost can be reduced.

さらにまた、本発明によれば、第１凹部は、取付筒部の一部分が入り込むように設けられ、前記第１凹部の外側には、芯部材のボルト取付部が入り込む第２凹部が設けられることにより、防振ブッシュ自体をサブフレームの補強部材として機能させることができ、サブフレームの剛性を確保することに貢献することができる。 Furthermore, according to the present invention, the first recess is provided so that a part of the mounting cylinder portion enters, and the second recess in which the bolt mounting portion of the core member enters is provided outside the first recess. Accordingly, the vibration-proof bushing itself can function as a reinforcing member for the subframe, which can contribute to ensuring the rigidity of the subframe.

またさらに、本発明によれば、第２凹部を芯部材のボルト取付部に対応する形状とすることにより、抜け止め機能を向上させることができる。 Furthermore, according to the present invention, the retaining function can be improved by forming the second recess into a shape corresponding to the bolt mounting portion of the core member .

本発明では、芯部材からの取付筒部の脱落を好適に回避することができると共に、組み付け作業性を向上させることが可能な防振ブッシュを得ることができる。 According to the present invention, it is possible to obtain a vibration-proof bushing that can suitably prevent the attachment cylinder portion from falling off the core member and can improve the assembly workability.

次に、本発明の実施形態について、適宜図面を参照しながら詳細に説明する。図１は、本発明の第１実施形態に係る防振ブッシュが組み込まれたサブフレーム機構の概略斜視図、図２は、図１に示されるサブフレーム機構の平面図、図３は、前記防振ブッシュがサブフレームに取り付けられる状態を示す斜視図、図４（ａ）は、図３のＩＶＡ−ＩＶＡ線に沿った防振ブッシュの横断面図、図４（ｂ）は、図４（ａ）の変形例に係る防振ブッシュの横断面図である。 Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. 1 is a schematic perspective view of a subframe mechanism in which a vibration isolating bushing according to a first embodiment of the present invention is incorporated, FIG. 2 is a plan view of the subframe mechanism shown in FIG. 1, and FIG. FIG. 4A is a perspective view showing a state in which the vibration bush is attached to the subframe, FIG. 4A is a transverse sectional view of the vibration isolation bush along the line IVA-IVA in FIG. 3, and FIG. It is a cross-sectional view of the anti-vibration bush which concerns on the modification of ().

図１及び図２に示すように、本発明の第１実施形態に係る防振ブッシュが組み込まれたサブフレーム機構１０は、図示しないエンジンを支持するサブフレーム１２と、車輪を車体に対して回動自在に支持するサスペンション構成部品からなり前記サブフレーム１２の左右両側に取り付けられるロアアーム１４と、前記サブフレーム１２とロアアーム１４との取り付け部位に設けられる防振ブッシュ１６とを含む。 As shown in FIGS. 1 and 2, the sub-frame mechanism 10 incorporating the vibration-proof bushing according to the first embodiment of the present invention includes a sub-frame 12 that supports an engine (not shown) and a wheel that rotates with respect to the vehicle body. It includes a lower arm 14 made of a suspension component that is movably supported and attached to the left and right sides of the subframe 12, and a vibration isolating bush 16 provided at an attachment site of the subframe 12 and the lower arm 14.

サブフレーム１２は、図示しないエンジンの車両前側を支持し車両幅方向に沿って延在するフロントクロスメンバ１８と、前記フロントクロスメンバ１８の軸方向に沿った両端部に結合され、前記フロントクロスメンバ１８から車両後方に向かって略平行に延在する一対のサイドメンバ２０ａ、２０ｂと、前記一対のサイドメンバ２０ａ、２０ｂの端部間に連結され、図示しないエンジンの車両後方側を支持し車両幅方向に沿って延在するリヤメンバ２２とから構成される。 The sub-frame 12 is coupled to a front cross member 18 that supports the front side of the vehicle (not shown) and extends in the vehicle width direction, and to both ends of the front cross member 18 along the axial direction. A pair of side members 20a, 20b extending substantially in parallel toward the rear of the vehicle from 18 and the ends of the pair of side members 20a, 20b are connected to support the rear side of the engine (not shown) and The rear member 22 extends along the direction.

サブフレーム１２の左右に位置する一対のサイドメンバ２０ａ、２０ｂの側部には、ロアアーム１４の中間部が取り付けられる第１サスペンション取付部（ロアアーム取付部）２４ａと、前記ロアアーム１４の一端部が取り付けられる第２サスペンション取付部２４ｂが設けられる。第１サスペンション取付部２４ａには、図３に示されるように、サイドメンバ２０ａ、２０ｂ（サブフレーム１２）の上面と側面とが交差する稜線部を切り欠いて形成され、防振ブッシュ１６が入り込む凹部２６が設けられる。第２サスペンション取付部２４ｂには、ロアアーム１４の一端部を軸支するピン部材２８が設けられる（図２参照）。なお、前記凹部２６は、後記する第２凹部との関係において第１凹部として機能するものである。 A first suspension attachment portion (lower arm attachment portion) 24a to which an intermediate portion of the lower arm 14 is attached and one end portion of the lower arm 14 are attached to the side portions of the pair of side members 20a and 20b positioned on the left and right sides of the subframe 12. The second suspension mounting portion 24b is provided. As shown in FIG. 3, the first suspension mounting portion 24a is formed by cutting out a ridge line portion where the upper surface and the side surface of the side members 20a and 20b (subframe 12) intersect, and the vibration isolating bush 16 enters. A recess 26 is provided. The second suspension mounting portion 24b is provided with a pin member 28 that pivotally supports one end portion of the lower arm 14 (see FIG. 2). In addition, the said recessed part 26 functions as a 1st recessed part in relation to the 2nd recessed part mentioned later.

防振ブッシュ１６は、図３及び図４（ａ）に示されるように、軸方向に沿った両端部にそれぞれ設けられた平板状のボルト取付部２９を有し、前記ボルト取付部２９に形成されたボルト挿通孔３０に挿通されるボルト３１を介してサブフレーム１２（サイドメンバ２０ａ、２０ｂの上面）に取り付けられる金属製のシャフト体からなる芯部材３２と、ロアアーム本体に連結された金属製円筒体からなり前記芯部材３２に同軸状に外嵌する取付筒部３４と、前記芯部材３２と前記取付筒部３４との間に介装されたスリーブ状からなりゴム等の振動吸収体によって形成された弾性体３６とを備える。 As shown in FIG. 3 and FIG. 4A, the anti-vibration bush 16 has flat bolt mounting portions 29 provided at both ends along the axial direction, and is formed in the bolt mounting portion 29. A core member 32 made of a metal shaft body attached to the sub-frame 12 (the upper surfaces of the side members 20a and 20b) via bolts 31 inserted into the bolt insertion holes 30 and a metal member connected to the lower arm body A cylindrical mounting body 34 that is coaxially fitted to the core member 32 and a sleeve that is interposed between the core member 32 and the mounting cylindrical section 34, and a vibration absorber such as rubber. The formed elastic body 36 is provided.

芯部材３２の軸方向に沿った両端側には、取付筒部３４の軸方向への移動を規制する一対の抜け止め部が設けられる。この一対の抜け止め部は、芯部材３２の軸方向に沿った一端側に位置し、サブフレーム１２の凹部２６の底面から上方に向かって突出するストッパブラケット３８と、芯部材３２の軸方向に沿った他端側に位置し、芯部材３２の外周面から半径外方向に膨出して一体成形されたストッパフランジ４０とによって構成される。 On both end sides along the axial direction of the core member 32, a pair of retaining portions for restricting the movement of the mounting cylinder portion 34 in the axial direction is provided. The pair of retaining portions are positioned on one end side along the axial direction of the core member 32, and are provided with a stopper bracket 38 projecting upward from the bottom surface of the recess 26 of the subframe 12, and the axial direction of the core member 32. The stopper flange 40 is located on the other end side along the outer circumferential surface of the core member 32 and bulges outward in the radial direction and is integrally formed.

この場合、前記ストッパブラケット３８は、取付筒部３４の軸方向に沿った一端部３４ａ（以下、外周縁部３４ａともいう）と係合するように設けられ、サブフレーム１２の凹部２６内に、例えば、溶接等によって一体的に固着される。 In this case, the stopper bracket 38 is provided so as to engage with one end 34 a (hereinafter also referred to as an outer peripheral edge 34 a) along the axial direction of the mounting cylinder portion 34, and is provided in the recess 26 of the subframe 12. For example, it is integrally fixed by welding or the like.

前記ストッパブラケット３８は、略Ｕ字状の平板からなり、芯部材３２のボルト取付部２９が上下方向で挿通可能なＵ字孔４２を有する。また、前記ストッパブラケット３８は、凹部２６を構成する内壁であって芯部材３２の軸方向に沿った一方の内壁（縦壁）の近傍部位に位置し、取付筒部３４の径方向に沿った外周縁部３４ａまで延在するように縦方向の高さ寸法及び横方向の幅寸法が設定される。一方、ストッパフランジ４０は、芯部材３２の外周面から半径外方向に膨出した円板状に形成される。 The stopper bracket 38 is formed of a substantially U-shaped flat plate, and has a U-shaped hole 42 through which the bolt mounting portion 29 of the core member 32 can be inserted in the vertical direction. Further, the stopper bracket 38 is an inner wall constituting the recess 26 and is located in the vicinity of one inner wall (vertical wall) along the axial direction of the core member 32, and along the radial direction of the mounting cylinder portion 34. The height dimension in the vertical direction and the width dimension in the horizontal direction are set so as to extend to the outer peripheral edge portion 34a. On the other hand, the stopper flange 40 is formed in a disk shape bulging radially outward from the outer peripheral surface of the core member 32.

なお、第１実施形態では、前記ストッパブラケット３８をサブフレーム１２と別体で構成し、溶接等の手段を用いてサブフレーム１２と一体的に結合するように構成しているが、これに限定されるものではなく、例えば、サブフレーム１２の凹部２６を構成する内壁の一部を切り倒してストッパブラケット３８として利用する等、サブフレーム１２と一体的に設けられるものであればよい。 In the first embodiment, the stopper bracket 38 is configured separately from the subframe 12 and is configured to be integrally coupled to the subframe 12 using means such as welding. However, the present invention is not limited to this. For example, a part of the inner wall constituting the concave portion 26 of the subframe 12 may be cut down and used as the stopper bracket 38 as long as it is provided integrally with the subframe 12.

また、図４（ｂ）に示されるように、サブフレーム１２側の凹部２６内に第１ストッパブラケット３８ａと第２ストッパブラケット３８ｂとをそれぞれ設け、芯部材３２の軸方向に沿った両端側に対向するように配設してもよい。 As shown in FIG. 4B, a first stopper bracket 38a and a second stopper bracket 38b are provided in the recess 26 on the subframe 12 side, respectively, and are provided at both end sides along the axial direction of the core member 32. You may arrange | position so that it may oppose.

第１実施形態では、抜け止め部として機能するストッパブラケット３８をサブフレーム１２側の凹部２６内に設けているため、芯部材３２に対してストッパリングを圧入する従来技術と比較して、取付筒部３４の軸方向への移動によって発生する軸方向の力（押圧力）が前記ストッパブラケット３８に付与された場合であっても芯部材３２から脱落する懸念がなく、取付筒部３４の抜け止め機能を確保することができる。 In the first embodiment, since the stopper bracket 38 functioning as a retaining portion is provided in the recess 26 on the subframe 12 side, compared to the conventional technique in which the stopper ring is press-fitted into the core member 32, the mounting cylinder Even when an axial force (pressing force) generated by the movement of the portion 34 in the axial direction is applied to the stopper bracket 38, there is no fear of falling off the core member 32, and the attachment cylinder portion 34 is prevented from coming off. Function can be secured.

さらに、第１実施形態では、芯部材３２の両端側に位置する一対の抜け止め部の中、少なくとも一方の抜け止め部であるストッパブラケット３８をサブフレーム１２の凹部２６内に設けることで、取付筒部３４を圧入する際に抜け止め部が邪魔となることがなく、また、防振ブッシュ１６の組み付け時に従来技術のような圧入工程を設けることが不要となるため、組み付け性を向上させることができる。なお、第１実施形態では、防振ブッシュ１６を構成する取付筒部３４の一部分が凹部２６（第１凹部）内に入り込むように構成されている。 Furthermore, in the first embodiment, the stopper bracket 38 which is at least one of the pair of retaining portions located at both ends of the core member 32 is provided in the recess 26 of the subframe 12 so as to be attached. When the cylindrical portion 34 is press-fitted, the retaining portion does not get in the way, and it is not necessary to provide a press-fitting step as in the prior art when assembling the vibration-isolating bushing 16, thereby improving the assemblability. Can do. In the first embodiment, a part of the mounting cylinder portion 34 constituting the vibration-proof bushing 16 is configured to enter the recess 26 (first recess).

次に、本発明の第２実施形態に係る防振ブッシュ１６ａを図５（ａ）、（ｂ）に示す。なお、以下に示される実施形態において、第１実施形態と同一の構成要素には同一の参照符号を付し、その詳細な説明を省略する。 Next, an anti-vibration bush 16a according to a second embodiment of the present invention is shown in FIGS. 5 (a) and 5 (b). In the embodiment described below, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

図５（ａ）は、第２実施形態に係る防振ブッシュがサブフレームに取り付けられ、凹部の一方の内壁自体を抜け止め部とする縦断面図、図５（ｂ）は、凹部の両方の内壁自体を抜け止め部とする縦断面図である。 FIG. 5A is a longitudinal sectional view in which the vibration-proof bushing according to the second embodiment is attached to the subframe, and one inner wall itself of the concave portion is a retaining portion, and FIG. It is a longitudinal cross-sectional view which uses inner wall itself as a retaining part.

この第２実施形態に係る防振ブッシュ１６ａでは、サブフレーム１２に形成された凹部２６（第１凹部）において、図５（ａ）に示されるように、取付筒部３４の軸方向に沿った一端部３４ａと係合する内壁４２ａ自体を取付筒部３４の軸方向への移動を規制する一方の抜け止め部として形成し（他方の抜け止め部はストッパフランジ４０）、又は、図５（ｂ）に示されるように、取付筒部３４の軸方向に沿った両端部３４ａ、３４ｂとそれぞれ係合し所定距離離間して相互に対向する一対の内壁４２ａ、４２ｂ自体を、取付筒部３４の軸方向への移動を規制する一対の抜け止め部として形成している点に特徴がある。 In the anti-vibration bush 16a according to the second embodiment, the concave portion 26 (first concave portion) formed in the subframe 12 extends along the axial direction of the mounting cylinder portion 34 as shown in FIG. The inner wall 42a itself that engages with the one end 34a is formed as one retaining portion that restricts the movement of the mounting cylinder portion 34 in the axial direction (the other retaining portion is the stopper flange 40), or FIG. ), The pair of inner walls 42a and 42b which are respectively engaged with both end portions 34a and 34b along the axial direction of the mounting cylinder portion 34 and are spaced apart from each other by a predetermined distance are attached to the mounting cylinder portion 34. It is characterized in that it is formed as a pair of retaining portions for restricting movement in the axial direction.

すなわち、凹部２６内にストッパブラケット３８を設けることがなく、凹部２６を構成する略鉛直面からなる相互に対向する内壁４２ａ、４２ｂ（縦壁）自体を抜け止め部として機能させることにより、部品点数を削減すると共に、製造工程を簡素化してコストを低減することができる。 In other words, the stopper bracket 38 is not provided in the recess 26, and the inner walls 42a and 42b (vertical walls) themselves, which are substantially vertical surfaces constituting the recess 26, function as the retaining portions, thereby reducing the number of parts. In addition, the manufacturing process can be simplified and the cost can be reduced.

次に、本発明の第３実施形態に係る防振ブッシュ１６ｂを図６〜図８に示す。図６は、第３実施形態に係る防振ブッシュの凹部への取り付け状態を示す斜視図、図７（ａ）は、図６のＶＩＩＡ−ＶＩＩＡ線に沿った縦断面図、図７（ｂ）は、図７（ａ）の変形例であって、第１凹部の片側の内壁自体を抜け止め部とする縦断面図、図８は、図６の変形例であって、第２凹部の形状を防振ブッシュのボルト取付部の形状に対応させた斜視図である。 Next, an anti-vibration bush 16b according to a third embodiment of the present invention is shown in FIGS. FIG. 6 is a perspective view showing a state in which the vibration-proof bushing according to the third embodiment is attached to the recess, FIG. 7A is a longitudinal sectional view taken along line VIIA-VIIA in FIG. 6, and FIG. FIG. 7A is a modification of FIG. 7A, and is a longitudinal sectional view in which the inner wall itself on one side of the first recess is a retaining portion. FIG. 8 is a modification of FIG. Is a perspective view corresponding to the shape of the bolt mounting portion of the vibration isolating bush.

この第３実施形態に係る防振ブッシュ１６ｂでは、ロアアーム１４に連結された取付筒部３４の一部分が入り込む第１凹部２６ａと、前記第１凹部２６ａの外側（両側）に芯部材３２の両側に設けられたボルト取付部２９が入り込む第２凹部２６ｂがそれぞれ形成されている点に特徴がある。 In the anti-vibration bush 16b according to the third embodiment, a first concave portion 26a into which a part of the mounting cylinder portion 34 connected to the lower arm 14 enters, and both sides of the core member 32 on the outer side (both sides) of the first concave portion 26a. It is characterized in that second recesses 26b into which the provided bolt mounting portions 29 enter are formed.

すなわち、サブフレーム１２側には、図７に示されるように、取付筒部３４の一部分（芯部材３２から下部側の円弧部分）が入り込む第１凹部２６ａが形成されると共に、前記第１凹部２６ａの外側に延在して芯部材３２のボルト取付部２９が入り込む第２凹部２６ｂを階段状に形成し、前記ボルト取付部２９に形成されたボルト挿通孔３０を介してボルト３１を螺入することにより、防振ブッシュ１６ｂ自体がサブフレーム１２の剛性を確保することに貢献させることができる。 That is, on the subframe 12 side, as shown in FIG. 7, a first recess 26 a into which a part of the mounting tube portion 34 (the arc portion on the lower side from the core member 32) enters is formed, and the first recess A second recess 26b is formed in a staircase shape extending to the outside of 26a and into which the bolt mounting portion 29 of the core member 32 enters, and a bolt 31 is screwed through a bolt insertion hole 30 formed in the bolt mounting portion 29. By doing so, the anti-vibration bush 16b itself can contribute to ensuring the rigidity of the sub-frame 12.

換言すると、金属製材料で形成されたシャフト状の芯部材３２をサブフレーム１２（サイドメンバ２０ａ、２０ｂ）の軸線と平行に併設し前記芯部材３２の両端部をボルト３１で固定することにより、防振ブッシュ１６ｂ自体を補強部材として機能させることができ、サブフレーム１２の剛性を向上させることができる。 In other words, a shaft-shaped core member 32 formed of a metal material is provided in parallel with the axis of the subframe 12 (side members 20a, 20b), and both ends of the core member 32 are fixed with the bolts 31. The anti-vibration bush 16b itself can function as a reinforcing member, and the rigidity of the subframe 12 can be improved.

この場合、第２凹部２６ｂは、図８に示されるように、ボルト取付部２９の形状に対応させて形成してもよいし、又は、図６に示されるように、第１凹部２６ａの幅寸法に対応させて矩形状に形成してもよい。また、図７（ｂ）の変形例に示されるように、第１凹部２６ａの片側の内壁４２ａ自体を一方の抜け止め部として機能させ、芯部材３２と一体的に膨出形成されたストッパフランジ４０を他方の抜け止め部として機能させるようにしてもよい。 In this case, the second recess 26b may be formed corresponding to the shape of the bolt mounting portion 29 as shown in FIG. 8, or the width of the first recess 26a as shown in FIG. You may form in a rectangular shape corresponding to a dimension. Further, as shown in the modification of FIG. 7B, a stopper flange formed so as to bulge integrally with the core member 32 by causing the inner wall 42a itself on one side of the first recess 26a to function as one retaining portion. 40 may function as the other retaining portion.

次に、本発明の第４実施形態に係る防振ブッシュ１６ｃを図９（ａ）〜（ｃ）に示す。図９（ａ）は、第４実施形態に係る防振ブッシュの第１凹部及び第２凹部への取り付け状態を示す斜視図、図９（ｂ）は、図９（ａ）のＩＸＢ−ＩＸＢ線に沿った縦断面図、図９（ｃ）は、図９（ａ）のＩＸＣ−ＩＸＣ線に沿った横断面図である。 Next, an anti-vibration bush 16c according to a fourth embodiment of the present invention is shown in FIGS. Fig.9 (a) is a perspective view which shows the attachment state to the 1st recessed part and 2nd recessed part of the anti-vibration bush based on 4th Embodiment, FIG.9 (b) is the IXB-IXB line | wire of Fig.9 (a). FIG. 9C is a transverse sectional view taken along line IXC-IXC in FIG. 9A.

この第４実施形態に係る防振ブッシュ１６ｃでは、サブフレーム１２（サイドメンバ２０ａ、２０ｂ）の側面に側面視して取付筒部３４及びボルト取付部２９が合体した形状に対応する第１凹部２６ａ及び第２凹部２６ｂを形成し、前記第１凹部２６ａ内に取付筒部３４の全体（全部）が装填されるように形成している点に特徴がある。 In the anti-vibration bush 16c according to the fourth embodiment, the first recess 26a corresponding to the shape in which the mounting cylinder portion 34 and the bolt mounting portion 29 are combined when viewed from the side of the subframe 12 (side members 20a, 20b). The second concave portion 26b is formed, and the entire mounting cylinder portion 34 (all) is formed in the first concave portion 26a.

すなわち、第１〜第３実施形態と比較して第１凹部２６ａ及び第２凹部２６ｂの深さを増大させると共に、第２凹部２６ｂを芯部材３２のボルト取付部２９の形状に対応させて幅狭に形成することにより、抜け止め部として機能する第１凹部２６ａの内壁４２ａ、４２ｂの面積が増大するため、抜け止め機能を向上させることができる。 That is, the depth of the first recess 26a and the second recess 26b is increased as compared with the first to third embodiments, and the second recess 26b is made to correspond to the shape of the bolt mounting portion 29 of the core member 32 and has a width. By forming it narrowly, the area of the inner walls 42a, 42b of the first recess 26a that functions as a retaining portion increases, so that the retaining function can be improved.

換言すると、第２及び第３実施形態において、第１凹部２６ａの内壁４２ａ、４２ｂを抜け止め部として機能させた場合、取付筒部３４における外周縁部３４ａの一部分（芯部材３２の下部側円弧部分）が第１凹部２６ａの内壁４２ａ、４２ｂに当接して抜け止め部として機能しているが、第４実施形態では、取付筒部３４における外周縁部３４ａの略全体が第１凹部２６ａの内壁４２ａ、４２ｂに当接して抜け止め部として機能させることができる。この結果、第４実施形態では、第１凹部２６ａにおいて抜け止め部として機能する内壁４２ａ、４２ｂの面積を増大させることができ、より一層確実に抜け止め機能を発揮させることができる。 In other words, in the second and third embodiments, when the inner walls 42a, 42b of the first recess 26a function as a retaining portion, a part of the outer peripheral edge 34a (the lower arc of the core member 32) Portion) abuts against the inner walls 42a, 42b of the first recess 26a and functions as a retaining portion, but in the fourth embodiment, substantially the entire outer peripheral edge 34a of the mounting cylinder 34 is formed of the first recess 26a. It can contact the inner walls 42a and 42b and function as a retaining portion. As a result, in the fourth embodiment, it is possible to increase the areas of the inner walls 42a and 42b that function as retaining portions in the first recess 26a, and to more reliably exhibit the retaining function.

なお、第４実施形態に係る防振ブッシュ１６ｃでは、図９（ａ）に示されるように、第２凹部２６ｂに沿ってボルト３１を挿通させ横方向からボルト取付部２９を固定するようにしているが、例えば、サブフレーム１２（２０ａ）の上面に図示しない孔部を穿孔し前記孔部に沿って上方からボルト３１を螺入するようにすることにより、防振ブッシュ１６ｃの取り付けが容易となり、組み付け性をより一層向上させることができる。 In the vibration isolating bush 16c according to the fourth embodiment, as shown in FIG. 9A, the bolt 31 is inserted along the second recess 26b and the bolt mounting portion 29 is fixed from the lateral direction. However, for example, by making a hole (not shown) on the upper surface of the subframe 12 (20a) and screwing the bolt 31 from above along the hole, the vibration isolating bush 16c can be easily attached. Assembling properties can be further improved.

本発明の第１実施形態に係る防振ブッシュが組み込まれたサブフレーム機構の概略斜視図である。It is a schematic perspective view of the sub-frame mechanism in which the anti-vibration bush which concerns on 1st Embodiment of this invention was integrated. 図１に示されるサブフレーム機構の平面図である。It is a top view of the sub-frame mechanism shown by FIG. 前記防振ブッシュがサブフレームに取り付けられる状態を示す斜視図である。It is a perspective view which shows the state in which the said vibration proof bush is attached to a sub-frame. （ａ）は、図３のＩＶＡ−ＩＶＡ線に沿った防振ブッシュの横断面図、（ｂ）は、（ａ）の変形例に係る防振ブッシュの横断面図である。(A) is a cross-sectional view of the anti-vibration bush along the line IVA-IVA in FIG. 3, and (b) is a cross-sectional view of the anti-vibration bush according to the modification of (a). （ａ）は、第２実施形態に係る防振ブッシュがサブフレームに取り付けられ、凹部の一方の内壁自体を抜け止め部とする縦断面図、図５（ｂ）は、凹部の両方の内壁自体を抜け止め部とする縦断面図である。FIG. 5A is a longitudinal sectional view in which the vibration-proof bushing according to the second embodiment is attached to the subframe, and one inner wall itself of the recess is a retaining portion, and FIG. 5B is the inner walls of both the recesses. It is a longitudinal cross-sectional view which uses as a retaining part. 第３実施形態に係る防振ブッシュの凹部への取り付け状態を示す斜視図である。It is a perspective view which shows the attachment state to the recessed part of the vibration isolating bush which concerns on 3rd Embodiment. （ａ）は、図６のＶＩＩＡ−ＶＩＩＡ線に沿った縦断面図、（ｂ）は、（ａ）の変形例であって、第１凹部の片側の内壁自体を抜け止め部とする縦断面図である。(A) is a longitudinal sectional view taken along the line VIIA-VIIA in FIG. 6, and (b) is a modification of (a), in which the inner wall itself on one side of the first recess is a retaining portion. FIG. 図６の変形例であって、第２凹部の形状を防振ブッシュのボルト取付部の形状に対応させた斜視図である。FIG. 7 is a modified example of FIG. 6 and is a perspective view in which the shape of the second recess is made to correspond to the shape of the bolt mounting portion of the vibration isolating bush. （ａ）は、第４実施形態に係る防振ブッシュの第１凹部及び第２凹部への取り付け状態を示す斜視図、（ｂ）は、（ａ）のＩＸＢ−ＩＸＢ線に沿った縦断面図、（ｃ）は、（ａ）のＩＸＣ−ＩＸＣ線に沿った横断面図である。(A) is a perspective view which shows the attachment state to the 1st recessed part and 2nd recessed part of the anti-vibration bush which concerns on 4th Embodiment, (b) is a longitudinal cross-sectional view along the IXB-IXB line | wire of (a). (C) is a cross-sectional view along the IXC-IXC line of (a).

Explanation of symbols

１２サブフレーム
１４ロアアーム
１６、１６ａ〜１６ｃ防振ブッシュ
２４ａサスペンション取付部（ロアアーム取付部）
２６凹部（第１凹部）
２６ａ第１凹部
２６ｂ第２凹部
２９ボルト取付部
３２芯部材
３４取付筒部
３８、３８ａ、３８ｂストッパブラケット（抜け止め部）
４２ａ、４２ｂ内壁 12 Subframe 14 Lower arm 16, 16a to 16c Anti-vibration bush 24a Suspension mounting part (lower arm mounting part)
26 recess (first recess)
26a 1st recessed part 26b 2nd recessed part 29 Bolt attachment part 32 Core member 34 Attachment cylinder part 38, 38a, 38b Stopper bracket (detachment prevention part)
42a, 42b inner wall

Claims

In a vibration-proof bushing having a core member attached to a sub-frame of a vehicle, and an attachment tube portion fitted on the core member and connected to a lower arm,
It is disposed on both ends along the axial direction of the core member, and includes a pair of retaining portions for restricting movement of the mounting cylinder portion in the axial direction,
At least one of the pair of retaining portions is provided in the subframe ,
The lower arm mounting portion of the subframe is provided with a first recess into which the mounting tube portion enters,
The inner wall itself of the first recess that engages with one end portion or both end portions along the axial direction of the mounting cylinder portion is used as a retaining portion.
A part of the mounting tube portion enters the first recess,
Wherein the outer side of the first recess, vibration damping rubber bushing according to claim Rukoto second recess is provided a bolt mounting portion of the core member enters.

The anti-vibration bush according to claim 1,
It said second recess, vibration damping bush according to claim Rukoto such a shape corresponding to the bolt mounting portion of the core member.