JPS6039591B2 - rear fork - Google Patents

Description

【発明の詳細な説明】 本発明は自動二輪車等に用いられるリヤフオークに関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rear fork used in motorcycles and the like.

自動二輪車の後車論懸架支持部材としてリャフオークが
用いられ、リャフオークは一体化された左右のメンバ間
に後車輪を挟み、後端で車軸を支持する。A rear wheel oak is used as a rear suspension support member of a motorcycle, and the rear wheel is sandwiched between integrated left and right members, and the rear end supports the axle.

１」ャフオークの各メンバは主として管材で成形され、
後端部に車軸を挿通固定する板状の車鞠取付部であるエ
ンドピースが設けられるが、エンドピースは比較的大き
な荷重が加わることから小型、軽量の自動二輪車等では
通常管材の端部を偏平に圧潰し、エンドピースとしてい
るが、比較的大きい自動二輪車では以上では充分なる強
度が得られ難いことから次の如く構成している。1. Each member of Jaffo Oak is mainly made of pipe material.
An end piece is provided at the rear end of the vehicle, which is a plate-shaped wheel mounting part through which the axle is inserted and fixed.However, because the end piece is subject to a relatively large load, the end of the tube is usually used for small and lightweight motorcycles. The end piece is made by crushing it flat, but since it is difficult to obtain sufficient strength for relatively large motorcycles, the end piece is constructed as follows.

即ち、例えば管端を裾込み加工でテーパやアールを付け
、フライス加工等で長手方向に割溝を形成し、割溝に管
材の肉厚より厚い板片を挟んで溶接したり、或は管端を
拡径して内部の短管や板片を挿入し、その部分を圧潰し
て板状のエンドピース部を一体成形しているが、かる従
釆手段は工数が多く、製造が面倒、煩雑であり、コスト
も高くつく他、前者では綾嬢痕が外部に表れ、仕上加工
を必要としたし、外観性の点で最良とはいい難い。That is, for example, the end of the pipe may be tapered or rounded by hemming, a split groove may be formed in the longitudinal direction by milling, and a piece of plate thicker than the wall thickness of the pipe material may be sandwiched and welded into the split groove. The diameter of the end is enlarged, a short pipe or plate piece is inserted inside, and the part is crushed to form a plate-shaped end piece, but this method requires a lot of man-hours and is difficult to manufacture. In addition to being complicated and expensive, in the former case, twill marks appear on the outside, requiring finishing processing, and it is difficult to say that it is the best in terms of appearance.

他の方法として管村の後端にスリット加工し、端部を圧
潰し、次いで先端のカール加工の三工程を行い、別部材
のエンドピースを結合する方法も行われるが、この場合
フオークパイプとエンドピースとの合せ精度が悪く、ア
ーク溶接等の溶接以外では充分な結合を行うことが驚か
しい。Another method is to make a slit at the rear end of the tube, crush the end, and then curl the tip, and then join the end piece of another member, but in this case it is a fork pipe. It is surprising that the accuracy of the alignment with the end piece is poor, and that it is not possible to make a sufficient connection using welding other than arc welding.

本発明は以上の如き従来のリャフオーク製造の不都合を
改善し、これの製造を容易化すべくなされたもので、警
部材の一端にエンドピースを隣装する長手方向のスリッ
トを設け、スリット端面は垂直に上下に折曲してフラン
ジ部を備え、このスリットにエンドピースを鞍装してろ
う付等でフランジ部とエンドピースとを後合するように
し、簡易な工程で精度良好な、そして外観性に優れ、且
っ強度上も優れるリャフオークを提供するにある。The present invention has been made in order to improve the above-mentioned disadvantages of conventional Lyaf oak production and to facilitate the production thereof.One end of the guard member is provided with a longitudinal slit for adjoining the end piece, and the end face of the slit is vertical. The flange part is provided by bending the slit up and down, and the end piece is fitted into this slit, and the flange part and the end piece are later joined together by brazing, etc., resulting in a simple process with good accuracy and good appearance. To provide Lyaf oak which has excellent properties and strength.

次に本発明の好適一実施例を添付図面に従って詳述する
。Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

第１図はリャフオーク１の平面図で、リャフオーク１は
後方に延出された二本のメンバ２，２と、これの前端部
間に架設れた枢支クロスメンバ３と、クロスメンバ３後
方間に架設された補強用のクロスメソバ４とからなる。FIG. 1 is a plan view of the rear oak 1. The rear oak 1 has two members 2, 2 extending rearward, a pivot cross member 3 installed between the front ends of these members, and a space between the rear cross members 3. It consists of a cross mesobar 4 for reinforcement installed on the bridge.

以上の左右のメンバ２，２の後端部にエンドピース５夫
々固着されている。第２図乃至第１１図は本発明に係る
リャフオークの製造工程を示し、メンバ２は管材とし、
丸、角、楕円等任意のパイプ材やパイプ状の部材が用い
られ、実施例では角パイプを用いた。End pieces 5 are fixed to the rear end portions of the left and right members 2, 2, respectively. 2 to 11 show the manufacturing process of Lyaf oak according to the present invention, where member 2 is a pipe material,
Any pipe material or pipe-shaped member, such as round, square, or oval, can be used, and in the example, a square pipe was used.

角パイプＷの後端面ａの上下面Ｗ，，Ｗ．の幅方向中央
部に長さ方向へ所定長さのスリットＷ２を形成し、スリ
ットＷ２はパイプＷの幅方向中心線を中心として設けら
れ、後続縁ｂに開放し、後端緑ｂを幅広とし、前方に次
第に幅狭くなるように教頭Ｖ型、即ち略三角形とする。The upper and lower surfaces W, , W of the rear end surface a of the square pipe W. A slit W2 of a predetermined length in the length direction is formed in the center of the pipe W in the width direction, and the slit W2 is provided centered on the center line in the width direction of the pipe W, and is open to the trailing edge b, with the trailing edge b being wide. , the vice principal is V-shaped, that is, roughly triangular, so that the width gradually narrows toward the front.

スリットＷ２の最深部である前端Ｗ３は端緑ｂと平行す
る如くフラットとし、これの左右に直線状に幅方向に切
欠Ｗ４，Ｗ４を設け、スリットＷ２の前端から左右に形
成された功欠Ｗ４，Ｗ４は、スリットＷ２を上下面で各
上下方向に折曲して起立し、垂下して形成するフランジ
部Ｗ５……の折曲量と同等か、これより若干大き目‘こ
設定する。これを第２図に示した。次にスリットＷ２の
両側の切欠Ｗ４端と後端緑ｂとを結んだラインｃの内側
の部分を上下面で各上下方向に略直角に折曲して上下に
起立、垂下するフランジ部Ｗ５・…・・を曲げ成形し、
第３図の如くフランジ部Ｗ５・・・・・・間にＶ型のス
リットＷ６が形成されることとなる。続いてフランジ部
Ｗ５・・・・・・の両外側Ｗ７を内側に曲げ成形し、フ
ランジ部Ｗ５・・・・・・間のスリットＷ６をフランジ
部Ｗ５・・・・・・の内面Ｗ８が略平行する如くし、こ
の間のスリットＷ９は平面長方形となるようにする。The front end W3, which is the deepest part of the slit W2, is flat so as to be parallel to the edge green b, and cutouts W4 are provided in the width direction in a straight line on the left and right sides, and the cutouts W4 are formed left and right from the front end of the slit W2. , W4 are set to be equal to or slightly larger than the amount of bending of the flange portion W5, which is formed by bending the slit W2 in each vertical direction on the upper and lower surfaces to stand up and hang down. This is shown in Figure 2. Next, the inner part of the line c connecting the notch W4 ends on both sides of the slit W2 and the rear end green b is bent on the upper and lower surfaces at approximately right angles in each vertical direction, and the flange part W5 is vertically erected and hangs down. ...Bending and forming,
As shown in FIG. 3, a V-shaped slit W6 is formed between the flange portions W5. Next, both outer sides W7 of the flange portion W5 are bent inward, and the slit W6 between the flange portion W5 is formed so that the inner surface W8 of the flange portion W5 is approximately They are parallel to each other, and the slit W9 between them is a rectangular plane.

スリットＷ９の幅、従ってフランジ部Ｗ５・・…・の対
向する内面Ｗ８…・・・間の間隔はこの間に挿入される
エンドピース部村Ｔ，ｏの肉厚より若干狭くなるように
し、スプリングバックを見込んで設定する。これを第４
図乃至第７図で示した。車軸取付部材であるエンドピー
ス部材Ｗ，。は第８図に示される如くで、前記スリット
Ｗ９より若干肉厚の板で成形され、後部寄り部に長孔状
の車軸挿通孔Ｗ，．を備えるとともに、前部の高さ方向
中間部に後方へのコ型の欠肉部Ｗ，２を備え、これは軽
量化のためで、欠肉部Ｗ，２を形成しないでも良い。以
上のエンドピース部材Ｗ，ｏを既述のスリットＷ９に軽
圧入する如く鉄挿し、エンドピース部材Ｗ，ｏの欠肉部
Ｗ，２の周辺部Ｗ，３がフランジ部Ｗ５の内面Ｗ８……
に面援触し、この接触は既述による密着状態でなされ、
爾後フランジ部Ｗ５とエンドピース部材Ｗ，ｏの圧援部
周辺の数個所を例えばスポット溶接して仮付けし、ろう
材を接触部にセットし、炉中ろう付等でろう付接合する
。The width of the slit W9, and thus the distance between the opposing inner surfaces W8 of the flange portions W5, should be slightly narrower than the wall thickness of the end piece sections T and o inserted between them, and the spring back Set it in anticipation of. This is the fourth
This is shown in FIGS. 7 to 7. End piece member W, which is an axle mounting member. , as shown in FIG. 8, is formed from a plate slightly thicker than the slit W9, and has elongated axle insertion holes W, . In addition, a U-shaped cutout part W, 2 extending toward the rear is provided at the middle part in the height direction of the front part, and this is for weight reduction, and the cutout part W, 2 may not be formed. The above-mentioned end piece members W, o are inserted into the slit W9 by light press-fitting, and the peripheral parts W, 3 of the missing parts W, 2 of the end piece members W, o are the inner surface W8 of the flange part W5...
This contact was made in close contact as described above,
Thereafter, the flange portion W5 and the end piece members W, o are temporarily attached at several points around the reinforced portions by, for example, spot welding, a brazing metal is set in the contact portions, and the joints are brazed by furnace brazing or the like.

尚仮付は必ずしも必要ではなく、治具でセットしても良
い。かくしてエンドピース部材Ｗ，ｏはパイプ材Ｗの後
端部にフラソジ部Ｗ５を介してろう付により接合一体化
され、リャフオーク１が形成されることとなる。It should be noted that temporary attachment is not necessarily necessary and may be set using a jig. In this way, the end piece members W and o are integrally joined to the rear end portion of the pipe material W by brazing via the flange portion W5, and the rear oak 1 is formed.

第１２図乃至第１４図は第２実施例を示し、スリットＷ
側の最深部の中央部に円形の穿孔部Ｗ，．４を設け、爾
後同様にフランジ部を形成し、フランジ部を相寄る方向
に折曲させたもので、これによれば強度上好ましく、こ
れに代えて角孔でも良い。12 to 14 show a second embodiment, in which the slit W
There is a circular perforation W in the center of the deepest part of the side. 4 is provided, and then a flange portion is formed in the same manner, and the flange portions are bent in the direction toward each other.This is preferable in terms of strength, and a square hole may be used instead.

以上で明らかな如く本発明によれば、スリット周縁のフ
ランジ部でエンドピース部材を接合したため、従来に比
し局部的応力が緩和され、応力集中が分散されて品質の
向上を図ることができ、又ろう付面積も大きく探れ、強
度上も優れたＩＪャフオークを簡易な工程、最少の工程
で得ることができ、量産性に優れ、コスト的にも有利で
あるとともに、ろう付で得られるため溶接痕も少なく、
或は全然なく、外観性の点でも優れ、仕上加工を要しな
いか、或は最少で足り、製作容易、コストダウンを更に
企画し得る等多大の利点を有する。As is clear from the above, according to the present invention, since the end piece members are joined at the flange portion around the slit, local stress is relaxed compared to the conventional method, stress concentration is dispersed, and quality can be improved. In addition, it is possible to obtain IJ oak with a large brazing area and excellent strength through a simple process and the minimum number of processes.It is excellent in mass production and is advantageous in terms of cost. There are few marks,
Or not at all, it has many advantages such as being excellent in appearance, requiring no or minimal finishing work, being easy to manufacture, and being able to further reduce costs.

【図面の簡単な説明】[Brief explanation of drawings]

図面は本発明の一実施例を示すもので、第１図はリャフ
オークの平面図、第２図乃至第１１図は製造工程を説明
する図で、第２図はスリット成形の図、第３図はフラン
ジ部成形の図、第４図は曲げ成後の図で平面図、第５図
は同側面図、第６図は端面図、第７図は第５図７一７線
断面図、第８図はエンドピース部材の側面図、第９図は
エンドピース接合状態の平面図、第１０図は同側面図、
第１１図は第１０図１１−１１線断面図、第１２図乃至
第１４図は変更実施例の第２図乃至第４図と同様の図で
ある。 尚図中Ｗは管部材、Ｗ５はフランジ部、Ｗ，ｏは車軸取
付部材である。 第１図 第２図 第３図 第４図 第５図 第６図 第７図 第８図 第１１図 第９図 第１０図 第１２図 第１３図 第１４図The drawings show one embodiment of the present invention; FIG. 1 is a plan view of Lyaf oak, FIGS. 2 to 11 are diagrams explaining the manufacturing process, FIG. 2 is a diagram of slit forming, and FIG. 4 is a plan view after bending, FIG. 5 is a side view of the same, FIG. 6 is an end view, FIG. 7 is a sectional view taken along line 5-7, and Fig. 8 is a side view of the end piece member, Fig. 9 is a plan view of the end piece joined state, Fig. 10 is a side view of the same,
FIG. 11 is a sectional view taken along line 11-11 in FIG. 10, and FIGS. 12 to 14 are views similar to FIGS. 2 to 4 of the modified embodiment. In the figure, W is a tube member, W5 is a flange portion, and W and o are axle mounting members. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 11 Figure 9 Figure 10 Figure 12 Figure 13 Figure 14

Claims (1)

【特許請求の範囲】 １ 後端部に車軸取付部材接合に必要な長さと幅で長さ
方向に形成され、且つ対向する長さ方向端部に上下に略
直角にフランジ部を形成したスリツトからなる車軸取付
部材嵌合部を備える管部材と、該管部材の嵌着部に密着
嵌装され、車軸挿通孔を備える車軸取付部材とを前記フ
ランジ部を介して溶着したことを特徴とするリヤフオー
ク。 ２ 前記フランジ部と車軸取付部材とはろう材を介して
溶着されている前記特許請求の範囲第１項記載のリヤフ
オーク。 ３ 前記車軸取付部材とフランジ部とはスポツト溶接等
で仮付され、ろう材を介して溶着されている前記特許請
求の範囲第１項記載のリヤフオーク。[Scope of Claims] 1. From a slit formed in the length direction at the rear end with a length and width necessary for joining the axle mounting member, and with flange portions formed at the opposing longitudinal ends at approximately right angles vertically. A rear fork characterized in that a tube member having an axle attachment member fitting portion and an axle attachment member closely fitted to the fitting portion of the tube member and having an axle insertion hole are welded together via the flange portion. . 2. The rear fork according to claim 1, wherein the flange portion and the axle mounting member are welded together via a brazing material. 3. The rear fork according to claim 1, wherein the axle mounting member and the flange portion are temporarily attached by spot welding or the like and welded together via a brazing metal.