JP2018103714A - Sub-frame for vehicle - Google Patents

Sub-frame for vehicle Download PDF

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JP2018103714A
JP2018103714A JP2016250845A JP2016250845A JP2018103714A JP 2018103714 A JP2018103714 A JP 2018103714A JP 2016250845 A JP2016250845 A JP 2016250845A JP 2016250845 A JP2016250845 A JP 2016250845A JP 2018103714 A JP2018103714 A JP 2018103714A
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Prior art keywords
holder
bush
positioning
side member
mounting hole
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JP2016250845A
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JP6882732B2 (en
Inventor
企三宜 藤
Kumiyoshi Fuji
企三宜 藤
晋 初岡
Susumu Hatsuoka
晋 初岡
忍 仲本
Shinobu Nakamoto
忍 仲本
修司 吉川
Shuji Yoshikawa
修司 吉川
正志 安藤
Masashi Ando
正志 安藤
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Mitsubishi Motors Corp
Hiruta Kogyo Co Ltd
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Mitsubishi Motors Corp
Hiruta Kogyo Co Ltd
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Priority to JP2016250845A priority Critical patent/JP6882732B2/en
Priority to CN201711205258.5A priority patent/CN108240397B/en
Publication of JP2018103714A publication Critical patent/JP2018103714A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a sub-frame for a vehicle, which is configured such that the position of a connection flange of a bush holder to be welded to a side member with use of the connection flange is consistently set constant.SOLUTION: In a rear sub-frame 1 for a vehicle, which includes side members in a face-to-face structure, a side member 2 is configured such that a bush holder 5 is fitted into a holder attachment hole 221 formed in an end portion of a lower component member 22. The bush holder 5 includes a connection flange 52 protruding radially outward from a tubular holder body 51 and a support flange 53 protruding radially inward from the holder body 51. A positioning notch 531 is provided in the support flange 53.SELECTED DRAWING: Figure 1

Description

本発明は、最中合わせ構造のサイドメンバを有する車両のサブフレームに関する。   The present invention relates to a vehicle subframe having a side member with a mid-fitting structure.

車両のサブフレーム（フロントサブフレーム又はリアサブフレーム）は、例えば車両の本体フレームとの接続部分にブッシュを介装する。ブッシュは、金属製の内筒及び外筒の間に弾性体（通常弾性ゴム）を挟み、前記弾性体が弾性変形することにより振動や衝撃を吸収又は緩和する。ブッシュは、サブフレームを構成するサイドメンバの所定部位（通常、サイドメンバの前後端部）にブッシュホルダを溶接して固定し、前記ブッシュホルダに外筒を内接させた状態で嵌めて構成される（例えば特許文献１・［0016］［図４］参照）。   The vehicle sub-frame (front sub-frame or rear sub-frame) has a bush interposed at a connection portion with the vehicle body frame, for example. The bush sandwiches an elastic body (usually elastic rubber) between a metal inner cylinder and an outer cylinder, and absorbs or relaxes vibrations and shocks by elastic deformation of the elastic body. The bush is configured by welding and fixing a bush holder to a predetermined portion (usually the front and rear end portions of the side member) of the side member constituting the subframe, with the outer cylinder inscribed in the bush holder. (See, for example, Patent Document 1 [0016] [FIG. 4]).

特開2015-189311号公報JP 2015-189311

車両のサブフレームにおけるブッシュは、ブッシュホルダを介してサイドメンバの所定部位に固定されるため、前記ブッシュホルダを前記所定部位に安定かつ強固に固定する必要がある。この点、特許文献１は、ブッシュホルダをどのようにサイドメンバの所定部位に溶接するかに触れていない。例えば、ブッシュホルダに溶接用の接合フランジを設け、前記接合フランジをサイドメンバに接面させて溶接することが考えられる。近年、溶接作業は機械化されているため、サイドメンバに対するブッシュホルダの周方向の位置決めをして、サイドメンバに接面する接合フランジの位置を常に一定にする必要がある。そこで、接合フランジを用いてブッシュホルダをサイドメンバに溶接することとし、前記接合フランジの位置を常に一定にするため、検討した。   Since the bush in the sub-frame of the vehicle is fixed to a predetermined part of the side member via the bush holder, it is necessary to fix the bush holder to the predetermined part stably and firmly. In this regard, Patent Document 1 does not touch how the bush holder is welded to a predetermined portion of the side member. For example, a welding flange for welding may be provided on the bush holder, and welding may be performed by bringing the joint flange into contact with a side member. In recent years, since welding work has been mechanized, it is necessary to position the bushing holder with respect to the side member in the circumferential direction so that the position of the joining flange contacting the side member is always constant. Therefore, a study was conducted to weld the bush holder to the side member using a joint flange, and to keep the position of the joint flange constant.

検討の結果開発したものが、最中合わせ構造のサイドメンバを有する車両のサブフレームにおいて、サイドメンバは、構成部材の少なくとも一方の端部に形成されたホルダ取付孔にブッシュホルダを嵌合して構成され、ブッシュホルダは、筒状のホルダ本体から半径外向きに張り出す接合フランジと、前記ホルダ本体から半径方向内向きに張り出す支持フランジとを有し、前記支持フランジに位置決め切欠を設けたことを特徴とする車両のサブフレームである。ブッシュホルダは、位置決め切欠を支持フランジに２個以上設けるとよい。最中合わせ構造とは、対となる板状の構成部材それぞれの縁部を重ね、一方の縁部を他方の縁部に接合する中空構造を意味する。   As a result of the study, in the sub-frame of a vehicle having a side member with a mid-fitting structure, the side member has a bush holder fitted into a holder mounting hole formed in at least one end of the component member. The bush holder has a joining flange projecting radially outward from the cylindrical holder body and a support flange projecting radially inward from the holder body, and a positioning notch is provided in the support flange. This is a vehicle subframe characterized by the above. The bush holder may be provided with two or more positioning notches on the support flange. The centering structure means a hollow structure in which the edge portions of each pair of plate-like constituent members are overlapped and one edge portion is joined to the other edge portion.

最中合わせ構造のサイドメンバは、一対の構成部材それぞれを治具に位置固定し、一定の位置関係で組み合わせた状態で溶接し、一体化する。本発明は、構成部材の一方を位置固定する治具にホルダ取付孔から位置決め突起を突出させ、前記位置決め突起にブッシュホルダの支持フランジに設けた位置決め切欠を掛合させることにより、前記構成部材の一方に対するブッシュホルダの接合フランジの位置を常に一定にする。ホルダ取付孔は円形で、位置決め切欠及び位置決め突起が１組あれば接合フランジの位置も特定できる。しかし、位置決め切欠及び位置決め突起を２個以上とすれば、より正確に接合フランジの位置も特定できる。複数の位置決め切欠は、周方向等間隔（２個の場合点対称位置）に設けるとよい。   The side members of the middle-fitting structure are integrated by welding each pair of component members in a fixed position relative to each other in a fixed positional relationship. According to the present invention, a positioning projection is protruded from a holder mounting hole to a jig for fixing one of the constituent members, and a positioning notch provided on a support flange of the bush holder is engaged with the positioning projection. The position of the joint flange of the bush holder with respect to is always constant. The holder mounting hole is circular, and if there is one set of positioning notch and positioning projection, the position of the joining flange can also be specified. However, if there are two or more positioning notches and positioning protrusions, the position of the joining flange can be specified more accurately. The plurality of positioning notches are preferably provided at equal intervals in the circumferential direction (point symmetry positions in the case of two).

本発明のサブフレームは、サイドメンバは、構成部材の少なくとも一方の端部に、ブッシュホルダを嵌合するホルダ取付孔を形成し、ブッシュホルダは、筒状のホルダ本体から半径外向きに張り出す接合フランジと、前記ホルダ本体から半径方向内向きに張り出す支持フランジとを有し、前記支持フランジに位置決め切欠を設けられ、サイドメンバの構成部材の一方を位置固定する治具からホルダ取付孔内に位置決め突起を突出させ、前記ホルダ取付孔にホルダ本体を嵌合させたブッシュホルダの位置決め切欠に前記位置決め突起を掛合させることによりホルダ取付孔に対するブッシュホルダの周方向を位置決めし、構成部材の一方に接面させた接合フランジを前記構成部材の一方に溶接する手順で製造される。   In the sub-frame of the present invention, the side member has a holder mounting hole for fitting the bush holder at at least one end of the component member, and the bush holder projects radially outward from the cylindrical holder body. A joint flange and a support flange projecting radially inward from the holder body, the positioning flange being provided in the support flange, and a holder for fixing one of the side member constituent members into the holder mounting hole The positioning protrusion is projected into the holder mounting hole, and the positioning protrusion is engaged with the positioning notch of the bush holder in which the holder main body is fitted into the holder mounting hole, thereby positioning the circumferential direction of the bush holder with respect to the holder mounting hole. It is manufactured by the procedure of welding the joining flange brought into contact with the surface to one of the constituent members.

本発明によって、接合フランジを用いてブッシュホルダをサイドメンバに溶接する構成において、ブッシュホルダの接合フランジをサイドメンバの構成部材の一方に対する位置を常に一定にできるため、機械化された溶接作業が利用できるようになり、サイドメンバ、ひいてはサブフレームの製造時間の短縮や製造コストの低減が実現される。ホルダ取付孔にブッシュホルダを嵌合させる作業は、作業者による手作業でもよい。しかし、例えば機械によりブッシュホルダをホルダ取付孔に嵌合させた後、ブッシュホルダを周方向に自転させることにより、位置決め切欠に位置決め突起が掛合したところで前記自転を停止させるようにすれば、接合フランジの位置特定も自動化され、サブフレームの製造時間の短縮や製造コストの低減がより見込めるようになる。   According to the present invention, in the configuration in which the bush holder is welded to the side member using the joint flange, the position of the joint flange of the bush holder with respect to one of the constituent members of the side member can be always constant, so that a mechanized welding operation can be used. As a result, it is possible to reduce the manufacturing time and the manufacturing cost of the side members, and thus the subframes. The operation of fitting the bush holder into the holder mounting hole may be a manual operation by an operator. However, if, for example, the bush holder is fitted into the holder mounting hole by a machine and then the bush holder is rotated in the circumferential direction, the rotation is stopped when the positioning protrusion is engaged with the positioning notch, so that the rotation is stopped. The position specification of the subframe is also automated, so that it is possible to further reduce the manufacturing time and the manufacturing cost of the subframe.

本発明を適用したリアサブフレームの一例を表す平面図である。It is a top view showing an example of the rear subframe to which the present invention is applied. 図１中Ａ矢視部拡大部分平面図である。FIG. 2 is an enlarged partial plan view of a portion indicated by an arrow A in FIG. 1. 本例のブッシュホルダを表す斜視図である。It is a perspective view showing the bush holder of this example. 本例のリアサブフレームにおけるサイドメンバの製造手順１を表す平面図である。It is a top view showing the manufacturing procedure 1 of the side member in the rear sub-frame of this example. 本例のリアサブフレームにおけるサイドメンバの製造手順１を表す側面図である。It is a side view showing the manufacturing procedure 1 of the side member in the rear sub-frame of this example. 本例のリアサブフレームにおけるサイドメンバの製造手順２を表す平面図である。It is a top view showing the manufacturing procedure 2 of the side member in the rear sub-frame of this example. 本例のリアサブフレームにおけるサイドメンバの製造手順２を表す側面図である。It is a side view showing the manufacturing procedure 2 of the side member in the rear sub-frame of this example. 本例のリアサブフレームにおけるサイドメンバの製造手順３を表す平面図である。It is a top view showing the manufacturing procedure 3 of the side member in the rear sub-frame of this example. 本例のリアサブフレームにおけるサイドメンバの製造手順３を表す側面図である。It is a side view showing the manufacturing procedure 3 of the side member in the rear sub-frame of this example.

以下、本発明を実施するための形態について図を参照しながら説明する。本発明は、例えば図１に見られように、左右のサイドメンバ２と前後のクロスメンバ３とから構成される車両のリアサブフレーム１に適用される。本例のリアサブフレーム１は、サイドメンバ２及びクロスメンバ３がいずれも最中合わせ構造である。サイドメンバ２は、上側構造部材21及び下側構成部材22から構成される最中合わせ構造で、前後両端に設けられたホルダ取付孔221に対して、下方からブッシュホルダ５が嵌め込まれる。説明の便宜上、右側のサイドメンバ２（図１中上側）を例に説明する。   Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. For example, as shown in FIG. 1, the present invention is applied to a rear subframe 1 of a vehicle including left and right side members 2 and front and rear cross members 3. In the rear sub-frame 1 of this example, the side member 2 and the cross member 3 are both in the middle structure. The side member 2 has an intermediate structure composed of an upper structural member 21 and a lower structural member 22, and the bush holder 5 is fitted from below into holder mounting holes 221 provided at both front and rear ends. For convenience of explanation, the right side member 2 (upper side in FIG. 1) will be described as an example.

右側のサイドメンバ２は、上下方向に半割された上側構成部材21及び下側構成部材22からなる最中合わせ構造である。本例のサイドメンバ２は、図４及び図５に見られるように、治具４に対して上側構成部材21を下向きに位置固定し、下向きにした下側構成部材22を上方から前記上側構成部材21の内側に嵌め込み、下側構成部材22の外面に上側構成部材21の縁部を溶接して、上側構成部材21及び下側構成部材22を接合する。サイドメンバ２は、本例と逆に、下側構成部材22の内側に上側構成部材21を嵌め込み、上側構成部材21の外面に下側構成部材22の縁部を溶接して接合した構成にしてもよい。   The right side member 2 has an intermediate joining structure including an upper component member 21 and a lower component member 22 that are divided in the vertical direction. 4 and 5, the side member 2 of the present example is configured such that the upper constituent member 21 is fixed downward with respect to the jig 4, and the lower constituent member 22 that is directed downward is the upper constituent member from above. The upper constituent member 21 and the lower constituent member 22 are joined by being fitted inside the member 21 and welding the edge of the upper constituent member 21 to the outer surface of the lower constituent member 22. Contrary to this example, the side member 2 has a configuration in which the upper constituent member 21 is fitted inside the lower constituent member 22 and the edge of the lower constituent member 22 is welded and joined to the outer surface of the upper constituent member 21. Also good.

本例のブッシュホルダ５は、円筒状のホルダ本体51の一方の端縁から半径方向外向きかつ点対称位置から一対の平面視台形状の支持フランジ53を張り出し、前記ホルダ本体51の他方の端縁から半径方向内向きかつ円環状の支持フランジ53を張り出した外観で、接合フランジ53及び支持フランジ53とホルダ本体51との境界を断面円弧状に結んでいる。ブッシュ（図示略）は、接合フランジ51を設けた一方の端縁側からホルダ本体51内に嵌め込み、支持フランジ53に当接させた状態で保持される。支持フランジ53は、点対称位置に一対の平面視円弧状の切欠である位置決め切欠531を設けている。   The bush holder 5 of this example projects a pair of trapezoidal support flanges 53 from the one end edge of the cylindrical holder main body 51 radially outward and from a point-symmetrical position, and the other end of the holder main body 51 The appearance is such that a radially inward and annular support flange 53 projects from the edge, and the joining flange 53 and the boundary between the support flange 53 and the holder main body 51 are connected in a circular arc shape. A bush (not shown) is fitted into the holder main body 51 from one end side where the joining flange 51 is provided, and is held in a state of being in contact with the support flange 53. The support flange 53 is provided with a positioning notch 531 which is a pair of arcuate notches in plan view at a point-symmetrical position.

ブッシュホルダ５は、下側構成部材22の両端に設けた平面視円形のホルダ取付孔221にホルダ本体51を貫通させ、ホルダ取付孔221の外面に接面させた接合フランジ52を前記外面に溶接し、下側構成部材22に固定する。ホルダ取付孔221は、ホルダ本体51の外径より大きい。これにより、断面円弧状である接合フランジ52とホルダ本体51との境界がホルダ取付孔221の内周縁と干渉しなくなり、ブッシュホルダ５の接合フランジ52が下側構成部材22の外面に必ず接面させることができる。   The bush holder 5 is welded to the outer surface by joining the holder body 51 through circular holder mounting holes 221 provided at both ends of the lower component member 22 through the holder body 51 and contacting the outer surface of the holder mounting hole 221. And fixed to the lower component 22. The holder mounting hole 221 is larger than the outer diameter of the holder body 51. As a result, the boundary between the joining flange 52 having a circular arc shape and the holder body 51 does not interfere with the inner peripheral edge of the holder mounting hole 221, and the joining flange 52 of the bush holder 5 is always in contact with the outer surface of the lower component member 22. Can be made.

上側構成部材21は、下側構成部材22のホルダ取付孔221と同心で平面視円弧状のホルダ取付切欠211を両端に設けている。ホルダ取付切欠211は、ホルダ取付孔221と異なり、内周縁の内径がホルダ本体51の外径に等しく設定されている。これにより、下側構成部材のホルダ取付孔221に貫通させたホルダ本体51は、ホルダ取付切欠211の内周縁に外面を当接させる。上側構成部材21及び下側構成部材22は、後述するように、治具４により位置関係が特定されるから、ホルダ取付切欠211に外面が当接するブッシュホルダ５は、上側構成部材21を介して下側構成部材22のホルダ取付孔221に対するブッシュホルダ５の位置関係が特定される。   The upper component member 21 is provided with holder mounting notches 211 concentric with the holder mounting hole 221 of the lower component member 22 and having a circular arc shape in plan view at both ends. Unlike the holder mounting hole 221, the holder mounting notch 211 is set so that the inner diameter of the inner peripheral edge is equal to the outer diameter of the holder body 51. As a result, the holder body 51 that has passed through the holder mounting hole 221 of the lower component member brings the outer surface into contact with the inner peripheral edge of the holder mounting notch 211. As described later, the positional relationship between the upper component member 21 and the lower component member 22 is specified by the jig 4, so that the bush holder 5 whose outer surface abuts on the holder mounting notch 211 is interposed via the upper component member 21. The positional relationship of the bush holder 5 with respect to the holder mounting hole 221 of the lower component 22 is specified.

本例のリアサブフレーム１におけるサイドメンバ２の製造手順（図４〜図９参照）を説明する。本例の治具４は、上側構成部材21及び下側構成部材22を接合する際における両者の位置関係を特定する（機能１）と共に、最中合わせする上側構成部材21及び下側構成部材22の縁部の重なり程度の特定する（機能２）。更に、本発明において、下側構成部材22のホルダ取付孔221に嵌合するブッシュホルダ５の接合フランジ52の周方向位置を特定する（機能３）。本発明のサイドメンバ２を製造する際に用いる治具４は、前記機能１及び機能３を備えていればよく、本例では更に機能２を加えた構成になっている。   A manufacturing procedure (see FIGS. 4 to 9) of the side member 2 in the rear subframe 1 of this example will be described. The jig 4 of this example specifies the positional relationship between the upper component member 21 and the lower component member 22 when they are joined (function 1), and the upper component member 21 and the lower component member 22 that are aligned during the process. The degree of overlap of the edges is specified (function 2). Furthermore, in the present invention, the circumferential position of the joint flange 52 of the bush holder 5 that fits into the holder mounting hole 221 of the lower component 22 is specified (function 3). The jig 4 used when manufacturing the side member 2 of the present invention has only to have the function 1 and the function 3, and in this example, the function 2 is further added.

本例の治具４は、図４及び図５に見られるように、サイドメンバ２の平面視形状に倣って屈曲した治具ベース44に、上向きにした上側構成部材21を位置固定で支持する上側構成部材位置決め部41と、前記上側構成部材21の内側に嵌合する下側構成部材22の嵌合量を特定する嵌合量特定部43と、前記上側構成部材位置決め部41に支持された上側構成部材21の内側に下向きにして嵌合させた下側構成部材22を位置固定で支持する下側構成部材位置決め部42と、そして前記下側構成部材22のホルダ取付孔221に差し込まれるホルダ位置決め部45とが設けられている。   As shown in FIGS. 4 and 5, the jig 4 of this example supports the upper constituent member 21 facing upward on a jig base 44 bent in accordance with the shape of the side member 2 in plan view. Supported by the upper constituent member positioning portion 41, the fitting amount specifying portion 43 that specifies the fitting amount of the lower constituent member 22 that fits inside the upper constituent member 21, and the upper constituent member positioning portion 41. The lower component member positioning portion 42 that supports the lower component member 22 that is fitted downward inside the upper component member 21 in a fixed position, and the holder that is inserted into the holder mounting hole 221 of the lower component member 22 A positioning part 45 is provided.

上側構成部材位置決め部41は、治具ベース44から上向きに突出した支持ブロックと、前記支持ブロックから上方に突出した支持ピンとから構成される。上側構成部材位置決め部41は、上側構成部材21に形成された位置決め孔に対応して１基ずつ、合計２基以上配置される（本例は２基）。上側構成部材21は、位置決め孔それぞれに対応する上側構成部材位置決め部41の支持ピンが差し込まれて水平方向に位置固定され、支持ブロックの上面を外面に当接させて上下方向に位置固定され、治具ベース44に対して位置関係を特定かつ位置固定される（機能１）。   The upper component member positioning portion 41 includes a support block protruding upward from the jig base 44 and a support pin protruding upward from the support block. Two or more upper constituent member positioning portions 41 are arranged one by one corresponding to the positioning holes formed in the upper constituent member 21 (two in this example). The upper component member 21 is fixed in the horizontal direction by inserting the support pins of the upper component member positioning portions 41 corresponding to the positioning holes, and fixed in the vertical direction by bringing the upper surface of the support block into contact with the outer surface, The positional relationship is specified and fixed with respect to the jig base 44 (function 1).

嵌合量特定部43は、治具ベース44から上向きに突出し、上記上側構成部材位置決め部41に支持された上側構成部材21に接近離反自在な支持ブロックと、前記支持ブロックから前記上側構成部材21に向けて突出した支持ピンとから構成される。本例は、説明の便宜上、嵌合量特定部43を２基（左右対称位置に２基）としたが、上側構成部材21及び下側構成部材22の延在方向に離れた２基以上の嵌合量特定部43が配置されることが好ましい。下側構成部材22は、上側構成部材21の差込孔に差し込まれた嵌合量特定部43の支持ピンに縁部が当接するように前記上側構成部材21に嵌め込まれることにより嵌合量が特定される（機能２）。   The fitting amount specifying portion 43 protrudes upward from the jig base 44, and can be freely moved toward and away from the upper constituent member 21 supported by the upper constituent member positioning portion 41, and the upper constituent member 21 from the support block. It is comprised from the support pin protruded toward. In this example, for convenience of explanation, two fitting amount specifying portions 43 (two in the left-right symmetric position) are used. However, two or more fitting members that are separated in the extending direction of the upper constituent member 21 and the lower constituent member 22 are used. It is preferable that the fitting amount specifying part 43 is arranged. The lower constituent member 22 is fitted into the upper constituent member 21 so that the edge abuts against the support pin of the fitting amount specifying portion 43 inserted into the insertion hole of the upper constituent member 21, thereby reducing the fitting amount. Specified (function 2).

下側構成部材位置決め部42は、治具ベース44に支持されて上下方向に揺動自在な押えブロックと、前記押えブロックから下方に突出した支持ピンとから構成される。下側構成部材位置決め部42は、下側構成部材21に形成された位置決め孔に対応して１基ずつ、合計２基以上配置される（本例は２基）。上側構成部材位置決め部41と下側構成部材位置決め部42の水平位置は、一致してもよいし、異なってもよい（本例は一致）。下側構成部材22は、上記嵌合量特定部43により特定の嵌合量で上側構成部材21の内側に嵌め込まれた状態で、位置決め孔それぞれに対応する下側構成部材位置決め部42の支持ピンが差し込まれて水平方向に位置固定され、押えブロックの下面を外面に当接させて上下方向に位置固定され、治具ベース44に対して位置関係を特定かつ位置固定される（機能１）。   The lower component member positioning portion 42 includes a presser block supported by the jig base 44 and swingable in the vertical direction, and a support pin protruding downward from the presser block. Two or more lower constituent member positioning portions 42 are arranged one by one in correspondence with the positioning holes formed in the lower constituent member 21 (two in this example). The horizontal positions of the upper component member positioning portion 41 and the lower component member positioning portion 42 may be the same or different (this example is the same). The lower constituent member 22 is a support pin of the lower constituent member positioning portion 42 corresponding to each positioning hole in a state of being fitted inside the upper constituent member 21 with a specific fitting amount by the fitting amount specifying portion 43. Is inserted and fixed in the horizontal direction, the lower surface of the presser block is brought into contact with the outer surface and fixed in the vertical direction, and the positional relationship is specified and fixed with respect to the jig base 44 (function 1).

ホルダ位置決め部45は、治具ベース44から上向きに突出した支持ブロックの上面に設けられた円柱状の本体と、前記本体に添えられた位置決め突起451とから構成される。ホルダ位置決め部45は、位置決め突起451のみでもよい。本例の位置決め突起451は、本体の平面視中心に向けて半径方向に僅かに移動自在で、常態として半径方向外向きに付勢され、円柱状の本体が半径方向内向きのストッパとして働く。ホルダ位置決め部45は、半径方向外向きに移動した位置決め突起451がブッシュホルダ５の位置決め切欠531に掛合できる程度に離れており、円柱状の本体は、前記位置決め突起451に挟まれる外径である。   The holder positioning unit 45 includes a cylindrical main body provided on the upper surface of the support block that protrudes upward from the jig base 44, and a positioning projection 451 attached to the main body. The holder positioning part 45 may be only the positioning protrusion 451. The positioning protrusion 451 of this example is slightly movable in the radial direction toward the center of the main body in plan view, and is normally urged outward in the radial direction, and the cylindrical main body functions as a radially inward stopper. The holder positioning portion 45 is separated to such an extent that the positioning projection 451 moved outward in the radial direction can be engaged with the positioning notch 531 of the bush holder 5, and the cylindrical main body has an outer diameter sandwiched between the positioning projections 451. .

ホルダ位置決め部45は、上側構成部材21のホルダ取付切欠211や下側構成部材22のホルダ取付孔221に対応して１基ずつ、合計２基配置される。ホルダ位置決め部45は、上側構成部材21及び下側構成部材22がそれぞれ上側構成部材位置決め部41及び下側構成部材位置決め部42に位置固定されると、本体の水平位置がホルダ取付切欠211やホルダ取付孔221と同心で、治具４において下側となる上側構成部材21のホルダ取付切欠211からやや上方に突出するまで差し込まれ、ホルダ取付孔221に嵌め込まれるブッシュホルダ５の位置決め切欠531に位置決め突起451を掛合させる（機能３）。   A total of two holder positioning portions 45 are arranged corresponding to the holder mounting notches 211 of the upper constituent member 21 and the holder mounting holes 221 of the lower constituent member 22. The holder positioning unit 45 is configured such that when the upper component member 21 and the lower component member 22 are fixed to the upper component member positioning unit 41 and the lower component member positioning unit 42, respectively, the horizontal position of the main body is set to the holder mounting notch 211 or the holder. It is concentric with the mounting hole 221 and is inserted from the holder mounting notch 211 of the lower upper constituent member 21 on the jig 4 until it protrudes slightly upward, and is positioned in the positioning notch 531 of the bush holder 5 fitted in the holder mounting hole 221. The protrusion 451 is engaged (function 3).

治具４に位置固定された上側構成部材21及び下側構成部材22は、上側構成部材21の縁部を下側構成部材22の外面に溶接することにより接合する。溶接作業は、溶接ロボットを用いた機械作業である場合、上側構成部材21及び下側構成部材22の位置関係や嵌合量が特定されていることが好ましい。ブッシュホルダ５は、前記溶接作業と同時又は前後で、下側構成部材22に接合される。ブッシュホルダ５の溶接作業も機械作業である場合、上側構成部材21及び下側構成部材22の溶接作業に用いられる溶接ロボットを利用することができるため、両溶接作業は同時に実施されることが望ましい。   The upper constituent member 21 and the lower constituent member 22 fixed to the jig 4 are joined by welding the edge of the upper constituent member 21 to the outer surface of the lower constituent member 22. When the welding operation is a mechanical operation using a welding robot, it is preferable that the positional relationship and the fitting amount of the upper component member 21 and the lower component member 22 are specified. The bush holder 5 is joined to the lower component 22 at the same time or before and after the welding operation. When the welding operation of the bush holder 5 is also a mechanical operation, it is preferable to perform both welding operations simultaneously because the welding robot used for the welding operation of the upper component member 21 and the lower component member 22 can be used. .

ブッシュホルダ５は、図６及び図７に見られるように、接合フランジ52を上、支持フランジ53を下にした姿勢で、下側構成部材22のホルダ取付孔221に上方からホルダ本体51を嵌め込む。このとき、ホルダ本体51と下側構成部材22のホルダ取付孔221との中心がずれていても、ホルダ本体51の外面を上側構成部材21のホルダ取付切欠211の内周縁に当接させた状態で接合フランジ52を下側構成部材22の外面に接面させることにより、前記ずれが解消される。ブッシュホルダ５は、ブッシュの位置を特定する働きを有しているので、上側構成部材21及び下側構成部材22に対する位置関係が特定されることが望ましい。   As shown in FIGS. 6 and 7, the bush holder 5 is fitted with the holder body 51 from above in the holder mounting hole 221 of the lower component member 22 with the joint flange 52 up and the support flange 53 down. Include. At this time, even if the center of the holder main body 51 and the holder mounting hole 221 of the lower constituent member 22 is shifted, the outer surface of the holder main body 51 is in contact with the inner peripheral edge of the holder mounting notch 211 of the upper constituent member 21. Thus, by bringing the joining flange 52 into contact with the outer surface of the lower component member 22, the shift is eliminated. Since the bush holder 5 has a function of specifying the position of the bush, it is desirable that the positional relationship with respect to the upper constituent member 21 and the lower constituent member 22 is specified.

また、ブッシュホルダ５の位置決め切欠531とホルダ位置決め部45の位置決め突起451とが周方向にずれていても、位置決め突起451が半径方向内向きに移動して支持フランジ53の内周縁に当接することで、ブッシュホルダ５をとりあえずホルダ取付孔221に嵌め込むことができる。ブッシュホルダ５は、周方向に回転させ、位置決め突起451が位置決め切欠531に掛合して節度感が感得できれば、周方向に位置決めされる。本例のブッシュホルダ５は、接合フランジ52が点対称な位置関係で一対設けているので、位置決め突起451を位置決め切欠531に掛合させる周方向の回転は、180度以下で済む。   Even if the positioning notch 531 of the bush holder 5 and the positioning projection 451 of the holder positioning portion 45 are displaced in the circumferential direction, the positioning projection 451 moves inward in the radial direction and abuts against the inner periphery of the support flange 53. Thus, the bush holder 5 can be fitted into the holder mounting hole 221 for the time being. The bush holder 5 is rotated in the circumferential direction, and if the positioning protrusion 451 engages with the positioning notch 531 and a sense of moderation can be obtained, the bush holder 5 is positioned in the circumferential direction. In the bush holder 5 of this example, since a pair of the joining flanges 52 are provided in a point-symmetrical positional relationship, the circumferential rotation for engaging the positioning protrusion 451 with the positioning notch 531 can be 180 degrees or less.

周方向に位置決めされたブッシュホルダ５は、接合フランジ52が下側構成部材22の外面に最大限接面する位置関係に設定されている。こうして接合フランジ52が下側構成部材22の外面に接面した状態で、図８及び図９に見られるように、接合フランジ52を下側構成部材22の外面に溶接すれば（図８及び図９中、溶接ビード54を図示）、下側構成部材22に対するブッシュホルダ５の取付が完了する。下側構成部材22の外面に対する接合フランジ52の接面範囲が広いため、溶接ビード54も長く形成され、ブッシュホルダ５を下側構成部材22に強固に固定できる。   The bush holder 5 positioned in the circumferential direction is set in a positional relationship in which the joining flange 52 is in contact with the outer surface of the lower component member 22 as much as possible. When the joining flange 52 is in contact with the outer surface of the lower component member 22 in this way, as shown in FIGS. 8 and 9, the joining flange 52 is welded to the outer surface of the lower component member 22 (see FIGS. 8 and 9). 9, the weld bead 54 is illustrated), and the attachment of the bush holder 5 to the lower component 22 is completed. Since the contact surface range of the joining flange 52 with respect to the outer surface of the lower constituent member 22 is wide, the weld bead 54 is also formed long, and the bush holder 5 can be firmly fixed to the lower constituent member 22.

本例のブッシュホルダ５は、サイドメンバ２の下側構成部材22に設けられたホルダ取付孔221に対して、接合フランジ52を下、支持フランジ53を上にした姿勢で下方から嵌め込まれる。このため、ブッシュ（図示略）は、ブッシュホルダ５に下方から嵌め込まれ、支持フランジ53に囲まれる開口から突出させた支持ロッドを例えば車体フレーム（図示略）に接続する。本発明は、サイドメンバ２に対するブッシュホルダ５の取付け方を特定するものでああり、前記サイドメンバ２に取付けるブッシュホルダ５であれば、具体的な取付構造が異なっても適用される。   The bush holder 5 of this example is fitted from below into a holder mounting hole 221 provided in the lower component member 22 of the side member 2 with the joint flange 52 down and the support flange 53 up. For this reason, the bush (not shown) is fitted into the bush holder 5 from below, and a support rod protruding from an opening surrounded by the support flange 53 is connected to, for example, a vehicle body frame (not shown). The present invention specifies how to attach the bush holder 5 to the side member 2, and the bush holder 5 to be attached to the side member 2 can be applied even if the specific attachment structure is different.

１ リアサブフレーム
２ サイドメンバ
21 上側構成部材
22 下側構成部材
３ クロスメンバ
４ 治具
41 上側構成部材位置決め部
42 下側構成部材位置決め部
43 嵌合量特定部
44 治具ベース
45 ホルダ位置決め部
５ ブッシュホルダ
51 ホルダ本体
52 接合フランジ
53 支持フランジ
531 位置決め切欠
54 溶接ビード 1 Rear subframe 2 Side member
21 Upper component
22 Lower component 3 Cross member 4 Jig
41 Upper component positioning part
42 Lower component positioning part
43 Mating amount identification part
44 Jig base
45 Holder positioning part 5 Bush holder
51 Holder body
52 Joint flange
53 Support flange
531 Positioning notch
54 Weld beads

Claims (3)

最中合わせ構造のサイドメンバを有する車両のサブフレームにおいて、
サイドメンバは、構成部材の少なくとも一方の端部に形成されたホルダ取付孔にブッシュホルダを嵌合して構成され、
ブッシュホルダは、筒状のホルダ本体から半径外向きに張り出す接合フランジと、前記ホルダ本体から半径方向内向きに張り出す支持フランジとを有し、前記支持フランジに位置決め切欠を設けたことを特徴とする車両のサブフレーム。 In the sub-frame of the vehicle having the side member of the middle structure,
The side member is configured by fitting a bush holder in a holder mounting hole formed in at least one end of the component member,
The bush holder has a joining flange projecting radially outward from the cylindrical holder body and a support flange projecting radially inward from the holder body, and a positioning notch is provided in the support flange. The vehicle subframe. ブッシュホルダは、位置決め切欠を支持フランジに２個以上設けた請求項１記載の車両のサブフレーム。 The vehicle subframe according to claim 1, wherein the bush holder is provided with two or more positioning notches on the support flange. 最中合わせ構造のサイドメンバを有する車両のサブフレームの製造に際し、
サイドメンバは、構成部材の少なくとも一方の端部に、ブッシュホルダを嵌合するホルダ取付孔を形成し、
ブッシュホルダは、筒状のホルダ本体から半径外向きに張り出す接合フランジと、前記ホルダ本体から半径方向内向きに張り出す支持フランジとを有し、前記支持フランジに位置決め切欠を設けられ、
サイドメンバの構成部材の一方を位置固定する治具からホルダ取付孔内に位置決め突起を突出させ、前記ホルダ取付孔にホルダ本体を嵌合させたブッシュホルダの位置決め切欠に前記位置決め突起を掛合させることによりホルダ取付孔に対するブッシュホルダの周方向を位置決めし、構成部材の一方に接面させた接合フランジを前記構成部材の一方に溶接することを特徴とする車両のサブフレームの製造方法。 When manufacturing a sub-frame of a vehicle having a side member with a middle structure,
The side member forms a holder mounting hole for fitting the bush holder at at least one end of the component member,
The bush holder has a joining flange projecting radially outward from the cylindrical holder body, and a support flange projecting radially inward from the holder body, and a positioning notch is provided in the support flange,
A positioning projection is projected into a holder mounting hole from a jig for fixing the position of one of the side member components, and the positioning projection is engaged with a positioning notch of a bush holder in which the holder body is fitted in the holder mounting hole. A method for manufacturing a sub-frame for a vehicle, comprising: positioning a circumferential direction of the bush holder with respect to the holder mounting hole and welding a joining flange brought into contact with one of the constituent members to one of the constituent members.
JP2016250845A 2016-12-26 2016-12-26 Vehicle subframe Active JP6882732B2 (en)

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