JP3971037B2 - Connecting rod breaking and splitting device - Google Patents

Connecting rod breaking and splitting device Download PDF

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Publication number
JP3971037B2
JP3971037B2 JP25942598A JP25942598A JP3971037B2 JP 3971037 B2 JP3971037 B2 JP 3971037B2 JP 25942598 A JP25942598 A JP 25942598A JP 25942598 A JP25942598 A JP 25942598A JP 3971037 B2 JP3971037 B2 JP 3971037B2
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Japan
Prior art keywords
connecting rod
wedge
mandrel
bearing cap
main body
Prior art date
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Expired - Fee Related
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JP25942598A
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Japanese (ja)
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JP2000071130A (en
Inventor
宏幸 松岡
利男 渡辺
克昭 相原
浩嗣 厨子
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Isuzu Motors Ltd
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Isuzu Motors Ltd
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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
    • F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
    • F16C9/04—Connecting-rod bearings; Attachments thereof
    • F16C9/045—Connecting-rod bearings; Attachments thereof the bearing cap of the connecting rod being split by fracturing
    • 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
    • F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
    • F16C7/02—Constructions of connecting-rods with constant length
    • F16C7/023—Constructions of connecting-rods with constant length for piston engines, pumps or the like

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、内燃機関等に使用されるコンロッド（コネクチングロッド）の破断分割装置の、殊に分割用のマンドレル及びくさびの改良に関するものである。
【０００２】
【従来の技術】
前記破断分割は、図４に示すように、コンロッド１を例えば焼結鍛造法により、本体２と軸受キャップ部３とを一体的に形成し、大端部４側の軸受部５内面の分割予定面に事前にノッチ５ａを入れておき、このようなコンロッド１を図４、図５に示すように、その小端部６を支持台１１に立てた小端基準ピン１２に嵌合し、また支持台１１上において大端部４の本体側固定板１３と対峙して設けた、軸受キャップ部側可動板１４に載せた軸受キャップ部３の左右の座３ａに、可動押圧部１５の先端１５ａを押し当てて固定するとともに、更に前記本体側固定板１３上に、コンロッド１の大端部４における、軸受キャップ部３に連成する肩４ａの部分に接触するように逃げ力受けピン１６を立て、このような状態で、大端部側軸受部５に嵌入した２つの分割用のマンドレル１７間にくさび１８をプレスで圧入し、これによって前記本体２と軸受キャップ部３とを前記ノッチ５ａ箇所で破断分割するものである。なお、１９は前記可動板１４のガイド板で、支持台１１上に固定されている。
【０００３】
前記分割用のマンドレル１７は本体側マンドレル１７−１と軸受キャップ部側マンドレル１７−２からなり、実際には図６に示すように、本体側マンドレル１７−１は前記本体側固定板１３にボルト２０により、また、軸受キャップ部側マンドレル１７−２は前記軸受キャップ部側可動板１４にボルト２１により各々固定されている。
従って、前記マンドレル１７−１、１７−２にコンロツド１の軸受部５を嵌装し、両マンドレル１７−１、１７−２の凹部１７−１ａ、１７−２ａ間に、くさび１８を例えばプレスＰにより圧入すれば、図７のように軸受キャップ部側可動板１４を移動させつつ軸受キャップ部３が本体２から破断、分割される。
【０００４】
ところが、前記のように本体側マンドレル１７−１、軸受キャップ部側マンドレル１７−２とも、それぞれ本体側固定板１３、軸受キャップ部側可動板１４にボルト２０、２１により各々固定されるので、その固定する際の精度によっては、前記マンドレル１７−１、１７−２の凹部１７−１ａと１７−２ａの互いに対向する部分の平行度が悪化し、更にくさび１８の精度も影響して、くさび１８が片当たりして集中的にマンドレル１７−１、１７−２に荷重がかかることがある。そして、これによってマンドレル１７−１、１７−２及びこれを固定した前記本体側固定板１３、軸受キャップ部側可動板１４に図７の矢印の如き強制的な回動を与え、前記破断、分割が正確に行われなかったり、またマンドレル１７−１、１７−２やくさび１８に偏摩耗や損傷を生ずることがあった。
【０００５】
【発明が解決しようとする課題】
本発明は上記に鑑み、マンドレルとくさびの片当たりをなくし、マンドレルやくさびに偏摩耗や損傷を生じさせず、前記コンロッド本体と軸受キャップ部の破断分割が正確に行われるようにすることを目的として案出され、その目的に沿ったコンロッドの破断・分割装置を提供することを課題とするものである。
【０００６】
【課題を解決するための手段】
前記課題を解決するための本発明のコンロッド破断・分割装置は、「大端部を構成する軸受キャップ部及び該キャップ部が接続する本体側とを一体的に形成したコンロッドの、大端部側軸受部に本体側及び軸受キャップ部側の分割用マンドレルを挿入し、両マンドレル間にくさびを圧入して前記本体と軸受キャップ部を破断分割する装置において、前記２個のマンドレルのそれぞれには、大端部側軸受部に嵌装される半円形部と、前記くさびが圧入される凹部が形成され、かつ、前記本体側のマンドレル及び前記くさびは、前記くさびの圧入方向と直交する面内において回動できるよう支持されている」ことを特徴とする。
【０００７】
【発明の実施の形態】
本発明の実施の形態を、図１乃至図３により詳細に説明する。
図１、図２は本発明のコンロッドの破断・分割装置３０の要部を示し、支持台３１上の長手方向に、図示しない押さえ板を介して一対のガイドレール３２を支持台３１に固定し、この一対のガイドレール３２によって、コンロッド本体側固定板３３及び軸受キャップ側可動板３４を挟むように且つ対峙させて配設している。
【０００８】
３５は本発明に係る分割用のマンドレルで、いずれも半円形の本体側マンドレル３５−１と軸受キャップ部側マンドレル３５−２からなり、両マンドレル３５−１、３５−２は、その胴部に合致するよう半円形に形成した前記固定板３３及び可動板３４の間に配設されるとともに、胴部内側には対向的に凹部３５−１ａ、３５−２ａが形成されている。なお、該凹部３５−１ａは垂直であるが、凹部３５−２ａはくさび１８の形状に合わせて傾斜させている。
【０００９】
また、前記両マンドレルの下端には半円形のフランジ部３５−１ｂ、３５−２ｂが形成されているが、軸受キャップ部側マンドレル３５−２は、フランジ部３５−２ｂを小ボルト３６によって前記可動板３４に固定されている。また、前記両マンドレル３５−１、３５−２における前記フランジ部３５−１ｂ、３５−２ｂは、支持台３１の上面に形成した長円形の窪み３１ａに可動的に嵌合されている。なお、３７は前記コンロッド本体側固定板３３を支持台３１に固定するボルトである。
【００１０】
上記のとおり本体側マンドレル３５−１と軸受キャップ部側マンドレル３５−２が回動乃至可動的に配設されている。図３に示すものは、本発明においてくさび１８として用いられる、プレスヘッドＰｈに対し回動し得る軸部３８をもつくさび３９を示すもので、前記のように回動可能な本体側マンドレル３５−１と組み合わせて使用する。軸受キャップ部側マンドレル３５−２は回動せず、単に支持台３１の長手方向、即ち軸受けキャップ部３が破断分割する方向に移動できればよい。
【００１１】
次に、図１、図２に示すように構成した、本発明コンロッド破断・分割装置の作動を説明する。
まず、前記コンロッドの破断・分割装置における支持台３１を図示しない手段で固定した上、コンロッド１の大端部側軸受部５を前記マンドレル３５に嵌装し着座させる。そして、コンロッド１を図４、図５に示した如き可動押圧部（１５）の先端（１５ａ）等で固定する。なお、コンロッド１の前記軸受部５内面には、前記両マンドレル３５−１、３５−２の対向部位と一致する破断分割予定面に予めノッチ５ａを形成しておくものとする。
【００１３】
ここで、くさび１８（３９）を、マンドレル３５の凹部３５−１ａ、３５−２ａにプレスＰ等の加圧手段によって圧入すれば、軸受キャップ部３は前記破断分割予定面から破断分割され、本体側２から離れて、軸受キャップ部側マンドレル３５−２及び軸受キャップ側可動板３４とともに、図１、図２で右へ移動する。
前記のように、図３の回動し得るくさび３９と、回動可能な本体側マンドレル３５−１とを組み合わせて使用し（軸受キャップ部側マンドレル３５−２は回動しないものでよい）、両マンドレル３５−１、３５−２間に前記くさび３９を圧入するので、くさび３９が本体側マンドレル３５−１を回動しつつ軸受キャップ部側マンドレル３５−２に密着する。したがって、くさび３９からの加圧力は効率良く両マンドレル３５−１、３５−２を介してコンロッド１に伝達し、軸受キャップ部３の破断分割を確実に行う。
【００１４】
【発明の効果】
本発明に係るコンロッドの破断・分割装置では、「大端部を構成する軸受キャップ部及び該キャップ部が接続する本体側とを一体的に形成したコンロッドの、大端部側軸受部に本体側及び軸受キャップ部側の分割用マンドレルを挿入し、両マンドレル間にくさびを圧入して前記本体と軸受キャップ部を破断分割する装置において、前記２個のマンドレルのそれぞれには、大端部側軸受部に嵌装される半円形部と、前記くさびが圧入される凹部が形成され、かつ、前記本体側のマンドレル及び前記くさびは、前記くさびの圧入方向と直交する面内において回動できるよう支持されている」ことによって、くさびはその圧入時にマンドレルと常に密着してくさびの片当たりをなくすことができ、これによって、マンドレルやくさびに前記片当たりによる偏摩耗や損傷を生ずることがない。また、くさびの片当たりがなくなることによって、コンロッド本体と軸受キャップ部の破断分割が正確に行われる効果もある。
【図面の簡単な説明】
【図１】 本発明コンロッド破断・分割装置の一実施例を示す要部断面図。
【図２】 本発明コンロッド破断・分割装置の一実施例を示す要部平面図。
【図３】 本発明コンロッドの破断・分割装置におけるくさびの一実施例を示す斜視図。
【図４】 従来のコンロッドの破断分割装置の平面図。
【図５】 従来のコンロッドの破断分割装置の断面図。
【図６】 図５に示すコンロッドの破断分割装置の要部断面図。
【図７】 図５に示すコンロッドの破断分割装置の作動を示す平面図。
【符号の説明】
１ コンロッド ２ 本体 ３ 軸受キャップ部 ４ 大端部
５軸受部 ５ａ ノッチ ６ 小端部 １１、３１ 支持台
１２ 小端基準ピン １３、３３ コンロッド本体側固定板
１４、３４ 軸受キャップ部側可動板 １５ 可動押圧部
１６ 逃げ力受けピン １７、３５ マンドレル
１７−１、３５−１ 本体側マンドレル
１７−２、３５−２ 軸受キャップ側マンドレル １８、３９ くさび
１９ ガイド板 ２０、２１、３７ ボルト ３２ ガイドレール
３６ 小ボルト ３８ 軸部。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a breaking and splitting device for a connecting rod (connecting rod) used in an internal combustion engine or the like, and particularly to an improvement of a split mandrel and a wedge.
[0002]
[Prior art]
As shown in FIG. 4, the fracture splitting is performed by integrally forming the main body 2 and the bearing cap portion 3 of the connecting rod 1 by, for example, sintering forging, and dividing the inner surface of the bearing portion 5 on the large end portion 4 side. advance can you put a notch 5a in the plane, FIG. 4 such connecting rod 1, as shown in FIG. 5, fitted to the small end 6 to the small end reference pin 12 stood on the support 11, Further, the tip of the movable pressing portion 15 is placed on the left and right seats 3a of the bearing cap portion 3 mounted on the bearing cap portion side movable plate 14 provided on the support base 11 so as to face the main body side fixed plate 13 of the large end portion 4. 15a is pressed and fixed, and further, on the main body side fixing plate 13, the escape force receiving pin 16 is brought into contact with the shoulder 4a portion of the large end portion 4 of the connecting rod 1 which is continuous with the bearing cap portion 3. In such a state, and fit into the large end side bearing portion 5 The wedge 18 is press-fitted in the press between the two dividing the mandrel 17, whereby is to fracture split and the body 2 and the bearing cap portion 3 in the notch 5a locations. Reference numeral 19 denotes a guide plate of the movable plate 14, which is fixed on the support base 11.
[0003]
The dividing mandrel 17 includes a main body side mandrel 17-1 and a bearing cap portion side mandrel 17-2. Actually, as shown in FIG. 6, the main body side mandrel 17-1 is bolted to the main body side fixing plate 13. 20, and the bearing cap portion side mandrel 17-2 is fixed to the bearing cap portion side movable plate 14 by bolts 21.
Therefore, the bearing portion 5 of the socket 1 is fitted to the mandrels 17-1 and 17-2, and the wedge 18 is pressed between the concave portions 17-1a and 17-2a of both mandrels 17-1 and 17-2, for example, by press P. 7, the bearing cap part 3 is broken and divided from the main body 2 while moving the bearing cap part side movable plate 14 as shown in FIG. 7.
[0004]
However, as described above, the main body side mandrel 17-1 and the bearing cap portion side mandrel 17-2 are respectively fixed to the main body side fixed plate 13 and the bearing cap portion side movable plate 14 by bolts 20 and 21, respectively. Depending on the accuracy at the time of fixing, the parallelism of the opposing portions of the recesses 17-1a and 17-2a of the mandrels 17-1 and 17-2 deteriorates, and the accuracy of the wedge 18 also affects the wedge 18. May hit the mandrels 17-1 and 17-2 in a concentrated manner. As a result, the mandrels 17-1 and 17-2 and the main body side fixed plate 13 and the bearing cap portion side movable plate 14 to which the mandrels 17 and 17-2 are fixed are forcedly rotated as indicated by arrows in FIG. May not be performed accurately, and the mandrels 17-1, 17-2 and the wedge 18 may be unevenly worn or damaged.
[0005]
[Problems to be solved by the invention]
In view of the above, an object of the present invention is to eliminate the contact between the mandrel and the wedge, to prevent partial wear and damage to the mandrel and the wedge, and to accurately perform the fracture division of the connecting rod body and the bearing cap portion. It is an object of the present invention to provide a connecting rod breaking / splitting device in accordance with the purpose.
[0006]
[Means for Solving the Problems]
The connecting rod breaking / splitting device according to the present invention for solving the above-mentioned problems is described as follows. “The large end portion side of the connecting rod integrally formed with the bearing cap portion constituting the large end portion and the main body side to which the cap portion is connected. In the apparatus for inserting the mandrel for splitting on the main body side and the bearing cap portion side into the bearing portion, press-fitting a wedge between both mandrels and splitting the main body and the bearing cap portion , each of the two mandrels includes: A semicircular portion fitted to the large end side bearing portion and a recess into which the wedge is press-fitted are formed, and the mandrel and the wedge on the main body side are within a plane perpendicular to the press-fitting direction of the wedge. It is supported so that it can rotate . "
[0007]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described in detail with reference to FIGS.
1 and 2 show a main part of the connecting rod breaking / dividing device 30 according to the present invention, and a pair of guide rails 32 are fixed to the support base 31 via a holding plate (not shown) in the longitudinal direction on the support base 31. The connecting rod body side fixed plate 33 and the bearing cap side movable plate 34 are sandwiched between and opposed to each other by the pair of guide rails 32.
[0008]
Reference numeral 35 denotes a dividing mandrel according to the present invention, which is composed of a semicircular main body side mandrel 35-1 and a bearing cap part side mandrel 35-2, and both mandrels 35-1 and 35-2 are disposed on the body part thereof. While being disposed between the fixed plate 33 and the movable plate 34 formed in a semicircular shape so as to coincide with each other, concave portions 35-1 a and 35-2 a are formed on the inner side of the trunk portion. The concave portion 35-1 a is vertical, but the concave portion 35-2 a is inclined according to the shape of the wedge 18.
[0009]
Also, semicircular flange portions 35-1b and 35-2b are formed at the lower ends of both mandrels. The bearing cap portion side mandrel 35-2 has the flange portion 35-2b that is movable by a small bolt 36. It is fixed to the plate 34. The flange portions 35-1b and 35-2b in the mandrels 35-1 and 35-2 are movably fitted in an oval depression 31a formed on the upper surface of the support base 31. Reference numeral 37 denotes a bolt for fixing the connecting rod main body side fixing plate 33 to the support base 31.
[0010]
The above as the main body mandrel 35-1 and the bearing cap portion side mandrel 35-2 that have been rotated or movably disposed. FIG. 3 shows a wedge 39 that also has a shaft portion 38 that can be rotated with respect to the press head Ph , which is used as the wedge 18 in the present invention. to use in combination with one. Bearing cap portion side mandrel 35-2 does not rotate, only the longitudinal direction of the support table 31, i.e., the bearing cap 3 may if moving in the direction of fracture splitting.
[0011]
Next, the operation of the connecting rod breaking / dividing apparatus of the present invention constructed as shown in FIGS. 1 and 2 will be described.
First, the support base 31 in the connecting rod breaking and dividing apparatus is fixed by means not shown, and the large end side bearing portion 5 of the connecting rod 1 is fitted and seated on the mandrel 35. Then, the connecting rod 1 is fixed by the tip (15a) of the movable pressing portion (15) as shown in FIGS. In addition, on the inner surface of the bearing portion 5 of the connecting rod 1, a notch 5a is formed in advance on the planned fracture splitting surface that coincides with the facing portions of the mandrels 35-1 and 35-2.
[0013]
Here, if the wedge 18 (39) is press-fitted into the recesses 35-1a and 35-2a of the mandrel 35 by a pressing means such as a press P, the bearing cap portion 3 is broken and divided from the planned fracture splitting surface, and the main body It moves away from the side 2 and moves to the right in FIGS. 1 and 2 together with the bearing cap part side mandrel 35-2 and the bearing cap side movable plate.
As described above, the pivotable wedge 39 of FIG. 3 and the rotatable main body side mandrel 35-1 are used in combination (the bearing cap part side mandrel 35-2 may not rotate), Since the wedge 39 is press-fitted between the mandrels 35-1 and 35-2, the wedge 39 comes into close contact with the bearing cap portion side mandrel 35-2 while rotating the main body side mandrel 35-1 . Accordingly, the applied pressure from the wedge 39 is efficiently transmitted to the connecting rod 1 via both mandrels 35-1 and 35-2, and the bearing cap portion 3 is reliably divided.
[0014]
【The invention's effect】
In fracture-splitting device of the connecting rod according to the present invention, the body "of the connecting rod which is integrally formed with the main body side of the bearing cap portion constituting the large end and the cap portion is connected to the big end side bearing portion insert the split mandrel side and the bearing cap portion side, in the apparatus for fracturing the body and the bearing cap portion by press-fitting the wedge between the two mandrels, each of the two mandrels big end side A semi-circular portion fitted to the bearing portion and a recess into which the wedge is press-fitted are formed, and the mandrel and the wedge on the main body side can be rotated in a plane orthogonal to the press-fitting direction of the wedge. by being supported "wedge can be eliminated always uneven contact of the wedge in close contact with the mandrel during its press fit, whereby, the piece hit the mandrel and the wedge Never causing uneven wear and damage due. In addition, since there is no contact between the wedges, there is an effect that the connecting rod main body and the bearing cap portion are accurately divided by breakage.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an essential part showing an embodiment of a connecting rod breaking / dividing apparatus of the present invention.
FIG. 2 is a plan view of an essential part showing an embodiment of the connecting rod breaking / dividing apparatus of the present invention.
FIG. 3 is a perspective view showing an embodiment of a wedge in the connecting rod breaking / dividing device of the present invention.
FIG. 4 is a plan view of a conventional connecting rod fracture splitting apparatus.
FIG. 5 is a sectional view of a conventional connecting rod fracture splitting apparatus.
6 is a cross-sectional view of the main part of the connecting rod fracture splitting device shown in FIG. 5;
7 is a plan view showing the operation of the connecting rod fracture splitting device shown in FIG. 5. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Connecting rod 2 Main body 3 Bearing cap part 4 Large end part 5 Bearing part 5a Notch 6 Small end part 11, 31 Support base 12 Small end reference pin 13, 33 Connecting rod main body side fixed plate 14, 34 Bearing cap part side movable plate 15 Movable Pressing portion 16 Escape force receiving pin 17, 35 Mandrel 17-1, 35-1 Main body side mandrel 17-2, 35-2 Bearing cap side mandrel 18, 39 Wedge 19 Guide plate 20, 21, 37 Bolt 32 Guide rail 36 Small Bolt 38 shaft.

Claims (1)

大端部を構成する軸受キャップ部及び該キャップ部が接続する本体側とを一体的に形成したコンロッドの、大端部側軸受部に本体側及び軸受キャップ部側の分割用マンドレルを挿入し、両マンドレル間にくさびを圧入して前記本体と軸受キャップ部を破断分割する装置において、
前記両マンドレルのそれぞれには、大端部側軸受部に嵌装される半円形部と、前記くさびが圧入される凹部とが形成され、かつ、
前記本体側のマンドレル及び前記くさびは、前記くさびの圧入方向と直交する面内において回動できるよう支持されていることを特徴とするコンロッド破断・分割装置。Inserting a split mandrel on the main body side and the bearing cap portion side into the large end side bearing portion of the connecting rod integrally formed with the bearing cap portion constituting the large end portion and the main body side to which the cap portion is connected, In an apparatus for press-fitting a wedge between both mandrels and splitting the main body and the bearing cap part,
Each of the mandrels is formed with a semicircular portion fitted into the large end side bearing portion, and a recess into which the wedge is press-fitted, and
The connecting rod breaking and dividing apparatus according to claim 1, wherein the body-side mandrel and the wedge are supported so as to be rotatable in a plane perpendicular to the press-fitting direction of the wedge .
JP25942598A 1998-08-30 1998-08-30 Connecting rod breaking and splitting device Expired - Fee Related JP3971037B2 (en)

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Application Number Priority Date Filing Date Title
JP25942598A JP3971037B2 (en) 1998-08-30 1998-08-30 Connecting rod breaking and splitting device

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JP3971037B2 true JP3971037B2 (en) 2007-09-05

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Publication number Priority date Publication date Assignee Title
JP2005074537A (en) * 2003-08-28 2005-03-24 Honda Motor Co Ltd Connecting rod dividing method and dividing device
JP4611002B2 (en) * 2004-11-25 2011-01-12 本田技研工業株式会社 Splitting method of connecting rod
US8006878B2 (en) 2004-11-25 2011-08-30 Honda Motor Co., Ltd. Splitting method and device for connecting rod
JP5703991B2 (en) 2011-06-24 2015-04-22 スズキ株式会社 Connecting rod fracture splitting method and apparatus

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