JPH0219328B2 - - Google Patents
Info
- Publication number
- JPH0219328B2 JPH0219328B2 JP60138366A JP13836685A JPH0219328B2 JP H0219328 B2 JPH0219328 B2 JP H0219328B2 JP 60138366 A JP60138366 A JP 60138366A JP 13836685 A JP13836685 A JP 13836685A JP H0219328 B2 JPH0219328 B2 JP H0219328B2
- Authority
- JP
- Japan
- Prior art keywords
- bearing metal
- protrusion
- large end
- connecting rod
- axial direction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Mounting Of Bearings Or Others (AREA)
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は、内燃機関のピストンとクランク軸と
の連結をなすコンロツドの大端部に取り付けられ
る軸受メタルの位置決め構造に係わり、特に、破
断によつて２分割される大端部を備えたコンロツ
ドに用いて好適な軸受メタルの位置決め構造に関
するものである。Detailed Description of the Invention "Field of Industrial Application" The present invention relates to a structure for positioning a bearing metal attached to the large end of a connecting rod that connects a piston and a crankshaft of an internal combustion engine, and particularly relates to a structure for positioning a bearing metal that is resistant to breakage. This invention relates to a bearing metal positioning structure suitable for use in a connecting rod having a large end portion that is divided into two parts.
「従来の技術」
従来、第１図に示すように、内燃機関のピスト
ンとクランク軸（いずれも図示略）とを連結する
コンロツド１は、クランク軸が取り付けられる大
端部１ａと、ピストンが取り付けられる小端部１
ｂと、両端部１ａ，１ｂを連結する幹部１ｃとに
よつて構成されている。さらに前記大端部１ａ
は、小端部１ｂおよび幹部１ｃが一体化されたロ
ツド側２に、該ロツド側２と別体に形成されたキ
ヤツプ側３をボルトで固定することによつて構成
されていて、内周面に、コンロツド１とクランク
軸との滑りを円滑にするために半円弧状の軸受メ
タル４（４ａ，４ｂ）が取り付けられている。``Prior Art'' Conventionally, as shown in FIG. 1, a connecting rod 1 that connects a piston of an internal combustion engine and a crankshaft (both not shown) has a large end 1a to which the crankshaft is attached, and a large end 1a to which the piston is attached. small end 1
b, and a trunk 1c that connects both ends 1a and 1b. Further, the large end portion 1a
The cap side 3, which is formed separately from the rod side 2, is fixed with a bolt to the rod side 2 in which the small end 1b and the trunk 1c are integrated, and the inner peripheral surface A semi-circular bearing metal 4 (4a, 4b) is attached to the connecting rod 1 to ensure smooth sliding between the connecting rod 1 and the crankshaft.
これら軸受メタル４（４ａ，４ｂ）がコンロツ
ド１にセツトされたときには、軸受メタル双方の
合わせ部に薄肉部のクラツシユリリーフＣが形成
されている関係上、第１図中左右位置の内面に凹
所が形成される。この凹所は、運転中においてコ
ンロツド１に慣性力が働き軸受メタル４（４ａ，
４ｂ）の内面が第１図中上下方向へ長く延びるよ
う変形してしまうときであつても、軸受メタルと
クランク軸との第１図における左右方向のクリア
ランスが「０」となるのを防ぎ、軸受メタルとク
ランク軸との間のオイル潤滑を良好に保つよう機
能するものである。 When these bearing metals 4 (4a, 4b) are set in the connecting rod 1, there are recesses on the inner surfaces at the left and right positions in FIG. A place is formed. This recess is formed by the bearing metal 4 (4a, 4a,
Even when the inner surface of 4b) is deformed so as to extend in the vertical direction in FIG. 1, the clearance between the bearing metal and the crankshaft in the left-right direction in FIG. 1 is prevented from becoming "0", It functions to maintain good oil lubrication between the bearing metal and the crankshaft.
ところで、軸受メタル４は内周面で支持するク
ランク軸から周方向へ回転されるような力を受け
る。仮に、軸受メタル４がそのような力を受けて
周方向へずれると、クラツシユリリーフＣの存在
により形成されている凹所の位置が第１図におけ
る左右位置からずれることとなり、所望のオイル
潤滑が行えなくなる。 By the way, the bearing metal 4 receives a force that causes it to rotate in the circumferential direction from the crankshaft that it supports on its inner peripheral surface. If the bearing metal 4 were to shift in the circumferential direction due to such force, the position of the recess formed by the presence of the crush relief C would shift from the left and right position in FIG. becomes unable to do so.
また、軸受メタル４は内周面で支持するクラン
ク軸から軸線方向へずらされるような力も受け
る。仮に、軸受メタル４が軸線方向へずれると、
同軸受メタルの端部がクランク軸側に設けた内Ｒ
部に乗り上げるおそれが生じ、これまた好ましく
ない。 Furthermore, the bearing metal 4 is also subjected to a force that causes it to be displaced in the axial direction from the crankshaft supported on its inner circumferential surface. If the bearing metal 4 shifts in the axial direction,
The end of the co-bearing metal has an inner radius on the crankshaft side.
This is also undesirable as there is a risk of the vehicle running over the surface of the vehicle.
そこで、前記軸受メタル４（４ａ，４ｂ）と大
端部１ａとの間には、両者の相対的な位置ずれ
（周方向並びに軸線方向のずれ）を防止するため
に位置決めのための対策が講じられている。 Therefore, measures are taken for positioning between the bearing metals 4 (4a, 4b) and the large end 1a in order to prevent relative positional displacement (displacement in the circumferential direction and the axial direction) between the two. It is being
このような位置決めのための一具体例として、
第２図および第３図に示すように、ロツド側２お
よびキヤツプ側３のそれぞれに、内周面２ａ（３
ａ）と合わせ面２ｂ（３ｂ）との交差部に凹部５
を形成して、ロツド側２とキヤツプ側３とを突き
合わせた状態おいて一方の合わせ面２ｂ（３ｂ）
の一部が露出するようにしておき、それぞれの内
周面２ａ（３ａ）へ軸受メタル４（４ａ，４ｂ）
を取り付けて両者を連結した際に、第４図に示す
ように各軸受メタル４（４ａ，４ｂ）の各端部を
突き合わせて環状体を形成するとともに、それぞ
れの一端部に形成した外方へ向かう突出部６（６
ａ，６ｂ）を前記凹部５内に嵌合させて、該突出
部６（６ａ，６ｂ）の端面を前記凹部５によつて
露出させられた対向する合わせ面２ｂ（３ｂ）へ
当接させることにより、コンロツド１と軸受メタ
ル４（４ａ，４ｂ）との位置決めを行なう構造の
ものが知られている。 As a specific example for such positioning,
As shown in FIGS. 2 and 3, an inner circumferential surface 2a (3
A recess 5 at the intersection of a) and the mating surface 2b (3b)
With the rod side 2 and cap side 3 butted against each other, one mating surface 2b (3b) is formed.
Bearing metals 4 (4a, 4b) are exposed to the respective inner circumferential surfaces 2a (3a).
When the bearing metals 4 (4a, 4b) are attached and connected, the ends of each bearing metal 4 (4a, 4b) are butted against each other to form an annular body, as shown in FIG. The protrusion 6 (6
a, 6b) into the recess 5, and the end surfaces of the protrusions 6 (6a, 6b) are brought into contact with the opposing mating surfaces 2b (3b) exposed by the recess 5. Accordingly, a structure is known in which the connecting rod 1 and the bearing metal 4 (4a, 4b) are positioned.
「発明が解決しようとする問題点」
本発明は、前述した従来の技術における次のよ
うな問題点を解決せんとするものである。"Problems to be Solved by the Invention" The present invention aims to solve the following problems in the conventional technology described above.
すなわち、前述した従来の位置決め構造を破断
分割型の大端部を有するコンロツド、すなわち、
例えば特開昭58−37311号公報に示されるように、
環状に形成された大端部を破断により２分割して
ロツド側とキヤツプ側とを形成したコンロツドで
あつて、ロツド側とキヤツプ側との合わせ面（こ
の場合は分割面）を意図的に粗面化して、大端部
の内面加工時における両者のずれを分割面相互の
引つ掛かりにより防止するようにしたコンロツド
に適用せんとした場合には、分割面が粗面化され
ていることから、軸受メタルと分割面との接触状
態が一定せず、また、分割の際の加工条件等によ
つて分割面の粗面化の状態や分割位置が変化し、
これに起因して、軸受メタルと大端部との位置決
めにばらつきが発生してしまうといつた問題点で
ある。 In other words, the conventional positioning structure described above can be replaced with a connecting rod having a split-type large end, that is,
For example, as shown in Japanese Patent Application Laid-Open No. 58-37311,
It is a connecting rod in which the annularly formed large end is divided into two by breaking to form a rod side and a cap side, and the mating surface (in this case, the dividing surface) of the rod side and cap side is intentionally roughened. If you want to apply it to a connecting rod that is planarized so that the gap between the two parts is prevented during internal machining of the large end by the catching of the split surfaces with each other, since the split surfaces are roughened, , the contact condition between the bearing metal and the split surface is not constant, and the roughening state of the split surface and the split position change depending on the processing conditions during splitting, etc.
This causes a problem in that variations occur in the positioning of the bearing metal and the large end.
「問題点を解決するための手段」
本発明は前述した従来の問題点を有効に解決し
得る破断分割型コンロツドにおける軸受メタルの
位置決め構造を提供せんとするもので、該位置決
め構造は、軸受メタルの外周に、該軸受メタルの
軸線方向の移動を規制するための第１の突起が軸
線方向の中央部に半径方向外方へ突出して設けら
れるとともに、同軸受メタルの周方向の移動を規
制するための第２の突起が、軸線方向の端部に半
径方向外方へ突出して設けられ、コンロツド大端
部の内面には前記軸受メタルの第１、第２の突起
に対応して、軸線方向の中央部に第１の溝が、ま
た軸線方向の端部に第２の溝がそれぞれ設けられ
ていることを特徴とする。"Means for Solving the Problems" The present invention aims to provide a structure for positioning a bearing metal in a fracture-split connecting rod, which can effectively solve the above-mentioned conventional problems. A first protrusion is provided on the outer periphery of the bearing metal so as to protrude outward in the radial direction at the central portion in the axial direction for regulating movement of the bearing metal in the axial direction, and also for regulating movement of the bearing metal in the circumferential direction. A second protrusion is provided at the end in the axial direction to protrude outward in the radial direction, and a second protrusion in the axial direction is provided on the inner surface of the large end of the connecting rod in correspondence with the first and second protrusions of the bearing metal. It is characterized in that a first groove is provided at the center of the shaft, and a second groove is provided at each end in the axial direction.
「作用」
本発明によれば、軸受メタルとコンロツド大端
部に、軸受メタルの軸線方向の移動を規制する一
対の突起と溝を、また、軸受メタルの周方向の移
動を規制する一対の突起と溝を、それぞれ別個に
独立して設けているため、それらを形成する場
合、規制せんとする方向の精度のみ確保すればよ
く、コンロツドおよび軸受メタルの製作が容易と
なり、かつ大端部の分割位置にかかわりなく軸受
メタルの確実な位置決めを行なうことが可能とな
る。"Function" According to the present invention, a pair of protrusions and grooves are provided on the bearing metal and the large end of the connecting rod to restrict movement of the bearing metal in the axial direction, and a pair of protrusions and grooves are provided to restrict movement of the bearing metal in the circumferential direction. Since the grooves and grooves are provided separately and independently, when forming them, it is only necessary to ensure accuracy in the direction of regulation, making it easy to manufacture connecting rods and bearing metals, and making it easier to separate the large end. It becomes possible to perform reliable positioning of the bearing metal regardless of its position.
「実施例」
以下、本発明を第５図〜第１１図に示す好適な
一実施例に基づき詳細に説明する。"Embodiment" The present invention will be described in detail below based on a preferred embodiment shown in FIGS. 5 to 11.
第５図中、符号７は本実施例が適用されたコン
ロツドを示すもので、大端部８、小端部９および
幹部１０によつて構成され、大端部８は図に示す
ように上下に２分割可能な構造とされ、ボルトに
よつて一体的に固定される構造となつている。 In FIG. 5, reference numeral 7 indicates a connecting rod to which this embodiment is applied, and is composed of a large end portion 8, a small end portion 9, and a trunk 10, and the large end portion 8 is arranged vertically as shown in the figure. It has a structure that can be divided into two parts, and is fixed integrally with bolts.
また、符号１１は大端部８に取り付けられる軸
受メタルであつて、大端部８と同様上下に２分割
可能な構造とされている。そして、この軸受メタ
ル１１を構成する上側軸受メタル半体１１ａおよ
び下側軸受メタル半体１１ｂは、前記大端部８の
内周面とほぼ同一の曲率を有するように形成さ
れ、かつ、合わせ面を中心として互いに対称な形
状に作られている。 Further, reference numeral 11 is a bearing metal attached to the large end portion 8, and like the large end portion 8, it has a structure that can be divided into upper and lower halves. The upper bearing metal half 11a and the lower bearing metal half 11b constituting the bearing metal 11 are formed to have approximately the same curvature as the inner circumferential surface of the large end 8, and have mating surfaces. They are made in a symmetrical shape with respect to the center.
次に、上記軸受メタル半体１１ａ（１１ｂ）に
ついて説明するが、ここでは、説明を簡略化する
ため、下側の軸受メタル半体１１ｂについてのみ
説明し、上側の軸受メタル半体１１ａについては
同一符号を付し、その説明を省略する。 Next, the above-mentioned bearing metal half body 11a (11b) will be explained. Here, in order to simplify the explanation, only the lower bearing metal half body 11b will be explained, and the upper bearing metal half body 11a is the same. Reference numerals are given and explanations thereof are omitted.
下側の軸受メタル半体１１ｂは、第７図に示す
ように外周側の裏金１２と内側の表金１３との２
層構造となつていて、その外周には第６図および
第７図に示すように、一方の合わせ面（図中左側
の合わせ面）上であつて軸線ｌ方向の中央部（端
部を除いた意味の中央部）に、半径方向外方へ突
出する第１の突起１４が形成されている。この突
起１４は、軸線と平行する線l1を基準に、そこか
ら周方向先端側を半径方向外方へ折曲することに
よつて形成されている。また、同下側軸受メタル
半体１１ｂの外周には、一方の合わせ面上であつ
て軸線方向の一端側に、半径方向外方へ突出する
第２の突起１５が形成されている。この突起１５
は、合わせ面から若干下方へ下がつた位置に軸線
に平行に延びる切り込みを入れ、この切り込みの
上側部分を軸受メタル半体１１ａ，１１ｂ同士の
合わせ面に直交する線l2を基準に、そこから外方
へ折曲することによつて形成されている。すなわ
ち、第１の突起１４と第２の突起１５とは、それ
ぞれ折曲される方向が90゜ずれている。前記第１
の突起１４の外側面には前記軸受メタルの軸線ｌ
に直交する係止面１４ａ，１４ｂが形成され、ま
た、前記第２の突起１５の第７図中下側の側面す
なわち軸受メタル合わせ面の反対側の側面には、
該合わせ面に平行な係止面１５ａ，１５ｂが形成
されている。 As shown in FIG.
It has a layered structure, and as shown in Figures 6 and 7, there is a layer on its outer periphery that is located on one of the mating surfaces (the mating surface on the left side in the figure) and at the center in the axis l direction (excluding the edges). A first protrusion 14 that protrudes outward in the radial direction is formed at the center (in the sense of the center). This protrusion 14 is formed by bending the tip end side in the circumferential direction from the line l1 parallel to the axis radially outward. Further, on the outer periphery of the lower bearing metal half body 11b, a second protrusion 15 is formed on one mating surface and on one end side in the axial direction, and protrudes outward in the radial direction. This protrusion 15
In this method, a notch is made extending parallel to the axis at a position slightly downward from the mating surface, and the upper part of this notch is aligned with the line l2 perpendicular to the mating surface of the bearing metal halves 11a and 11b. It is formed by bending outward from. That is, the bending directions of the first protrusion 14 and the second protrusion 15 are shifted by 90 degrees. Said first
The axis l of the bearing metal is located on the outer surface of the protrusion 14.
Locking surfaces 14a and 14b are formed perpendicular to the second protrusion 15, and the lower side surface of the second protrusion 15 in FIG. 7, that is, the side surface opposite to the bearing metal mating surface.
Locking surfaces 15a and 15b are formed parallel to the mating surfaces.
また、軸受メタル半体１１ｂの周方向両端部
（合わせ面近傍）は、第８図に示すように表金１
３が薄肉化されており、クラツシユリリーフＣが
形成されている。 Further, both ends in the circumferential direction (near the mating surfaces) of the bearing metal half body 11b are connected to the face metal 1 as shown in FIG.
3 is made thinner, and a crush relief C is formed.
一方、前記コンロツド７の大端部８は、第９図
に示すようにその一方の側面に、長さ方向と直交
しかつ大端部８の中心を通る半径方向の線に沿つ
てＵ字溝２１が１組形成され、また、他方の側面
には、前記Ｕ字溝２１と同一の条件でＶ字溝２２
が１組形成されている（第１０図参照）。これら
の両溝２１，２２は、前記大端部８に設定された
分割ラインＬに沿つて応力集中部を形成し、該大
端部８を分割する際に、極力分割ラインＬに沿つ
た破断を行なわせるために形成されるものであ
る。 On the other hand, as shown in FIG. 9, the large end 8 of the connecting rod 7 has a U-shaped groove formed on one side thereof along a radial line that is perpendicular to the length direction and passes through the center of the large end 8. 21 are formed, and a V-shaped groove 22 is formed on the other side under the same conditions as the U-shaped groove 21.
One set is formed (see Fig. 10). These grooves 21 and 22 form a stress concentration part along the dividing line L set in the large end 8, and when dividing the large end 8, the fracture is made along the dividing line L as much as possible. It is formed in order to perform the following.
さらに、前記大端部８を構成するロツド側半体
８ａおよびキヤツプ側半体８ｂには、前記軸受メ
タル１１の両突起１４，１５に対応して第１の溝
２３、第２の溝２４がそれぞれ形成されている。 Further, a first groove 23 and a second groove 24 are formed in the rod side half 8a and the cap side half 8b constituting the large end 8, corresponding to both the protrusions 14 and 15 of the bearing metal 11. each formed.
すなわち、大端部半体８ａ（８ｂ）には、第１
０図および第１１図に示すように、内周面と一方
の分割面との交差部分であつて軸線方向の中央部
に第１の溝２３が形成されている。この溝２３
は、軸受メタル１１を大端部８に組み付けた際、
軸受メタル１１の突起１４の両外側面と係合し
て、同軸受メタル１１のコンロツド７に対する軸
線方向に相対移動を規制するものである。また、
大端部半体８ａ（８ｂ）には、内周面と一方の分
割面との交差部分であつて軸線方向の端部に第２
の溝２４が形成されている。この溝２４は、軸受
メタル１１を大端部８に組み付けた際、軸受メタ
ル１１の突起１５の上下端面と係合して、同軸受
メタル１１のコンロツド７に対する周方向の相対
移動を規制するものである。第１の溝２３には前
記第１の突起１４の係止面１４ａ，１４ｂに対応
する係止面２３ａ，２３ｂがコンロツド大端部の
軸線に直交して形成され、第２の溝２４には前記
第２の突起１５の係止面１５ａ，１５ｂに対応す
る係止面２４ａ，２４ｂがコンロツド大端部の合
わせ面に平行に形成されている。 That is, the large end half 8a (8b) has the first
As shown in FIG. 0 and FIG. 11, a first groove 23 is formed at the center in the axial direction at the intersection of the inner circumferential surface and one of the dividing surfaces. This groove 23
When the bearing metal 11 is assembled to the big end 8,
It engages with both outer surfaces of the protrusion 14 of the bearing metal 11 to restrict relative movement of the bearing metal 11 with respect to the connecting rod 7 in the axial direction. Also,
The large end half 8a (8b) has a second section at the end in the axial direction at the intersection of the inner circumferential surface and one dividing surface.
A groove 24 is formed. When the bearing metal 11 is assembled to the large end portion 8, this groove 24 engages with the upper and lower end surfaces of the protrusion 15 of the bearing metal 11 to restrict relative movement of the bearing metal 11 with respect to the connecting rod 7 in the circumferential direction. It is. In the first groove 23, locking surfaces 23a and 23b corresponding to the locking surfaces 14a and 14b of the first protrusion 14 are formed perpendicular to the axis of the large end of the connecting rod. Locking surfaces 24a and 24b corresponding to the locking surfaces 15a and 15b of the second protrusion 15 are formed parallel to the mating surfaces of the large end of the connecting rod.
次いで、前記軸受メタル１１をコンロツド７の
大端部８に取り付ける際の操作について説明すれ
ば、以下の通りである。 Next, the operation for attaching the bearing metal 11 to the large end 8 of the connecting rod 7 will be described as follows.
分割されたコンロツド大端部８のロツド側およ
びキヤツプ側の各半体８ａ，８ｂに、それぞれの
内周面に沿わせるように軸受メタル半体１１ａ，
１１ｂを挿入するとともに、各軸受メタル半体の
第１の突起１４および第２の突起１５を、大端部
８の溝２３，２４にそれぞれ嵌合させる。 Bearing metal halves 11a, 11a, 11a, 11b are attached to each of the halves 8a, 8b on the rod side and cap side of the divided connecting rod large end 8, along the respective inner peripheral surfaces.
11b, and the first protrusion 14 and second protrusion 15 of each bearing metal half are fitted into the grooves 23 and 24 of the large end 8, respectively.
しかるのちに、分割した大端部のロツド側８ａ
とキヤツプ側８ｂとを再度突き合わせてボルトで
連結することにより取り付けを完了する。 After that, the rod side 8a of the divided large end
and the cap side 8b are brought together again and connected with bolts to complete the installation.
このような取り付け操作に際し、コンロツド大
端部のロツド側８ａとキヤツプ側８ｂとの突き合
わせに伴つて、両軸受メタル半体１１ａ，１１ｂ
の各端面が当接させられ、さらに、ボルトの締め
付け力を増すことによつて、軸受メタル１１が大
端部８の内周面に圧接させられてコンロツド７へ
一体化される。 During such an installation operation, as the rod side 8a and cap side 8b of the large end of the connecting rod are butted together, both bearing metal halves 11a and 11b are
By further increasing the tightening force of the bolts, the bearing metal 11 is brought into pressure contact with the inner circumferential surface of the large end 8 and integrated into the connecting rod 7.
そして、このようにして取り付けられた前記軸
受メタル１１は、第１の突起１４の両外側係止面
１４ａ，１４ｂが大端部８の溝２３の両内側係止
面２３ａ，２３ｂにそれぞれ係合することで、同
軸受メタル１１のコンロツド７に対する軸線方向
の相対的移動が規制され、また、第２の突起１５
の上下係止面１５ａ，１５ｂが、大端部８の溝２
４の上下係止面２４ａ，２４ｂにそれぞれ係合す
ることで、コンロツド７に対する周方向の相対移
動が規制される。 The bearing metal 11 attached in this manner has both outer locking surfaces 14a and 14b of the first protrusion 14 engaged with both inner locking surfaces 23a and 23b of the groove 23 of the large end portion 8, respectively. By doing so, the relative movement of the bearing metal 11 with respect to the connecting rod 7 in the axial direction is restricted, and the second protrusion 15
The upper and lower locking surfaces 15a and 15b of the groove 2 of the large end 8
By engaging with the upper and lower locking surfaces 24a and 24b of 4, the relative movement in the circumferential direction with respect to the connecting rod 7 is regulated.
加えて、この実施例では、第１の突起１４を軸
受メタル半体１１ａ（１１ｂ）の合わせ面に配置
させているから、軸受メタル半体を大端部８にセ
ツトする際、目視によつて確認しながら突起１４
を溝２３に嵌合させることができ、組み付け作業
性に優れるという利点が得られる。 In addition, in this embodiment, since the first protrusion 14 is disposed on the mating surface of the bearing metal half 11a (11b), when setting the bearing metal half on the large end 8, it is easy to visually check. Protrusion 14 while checking
can be fitted into the groove 23, resulting in an advantage of excellent assembly workability.
また、突起を設けた際突起の周辺は多少なりと
も板厚が変化して一様な厚さを得にくく成るが、
上述のように配置すれば、両突起を離して配置す
ることができ、軸受メタル１１をほぼ一様な厚さ
にすることが可能となる。 Also, when a protrusion is provided, the thickness of the plate changes to some extent around the protrusion, making it difficult to obtain a uniform thickness.
If arranged as described above, both the protrusions can be arranged apart from each other, and the bearing metal 11 can have a substantially uniform thickness.
さらに、上記実施例の如く、第１および第２の
突起１４，１５双方を、軸受メタル半体１１ａ
（１１ｂ）の合わせ面上に配置すれば、端部は加
工が行い易いことから、突起を設ける上で加工上
の面でもまた精度の面でも有利となる。 Furthermore, as in the above embodiment, both the first and second protrusions 14 and 15 are connected to the bearing metal half body 11a.
If it is placed on the mating surface of (11b), the end portion can be easily machined, which is advantageous in terms of machining and accuracy when providing the protrusion.
「発明の効果」
以上説明したように、本発明に係わる破断分割
型コンロツドにおける軸受メタルの位置決め構造
によれば、軸受メタルとコンロツド大端部に、軸
受メタルの軸線方向の移動を規制する一対の突起
と溝を、また、軸受メタルの周方向の移動を規制
する一対の突起と溝を、それぞれ別個に独立して
設け、それらの突起と溝に軸線に直交する係止面
と合わせ面に平行な係止面をそれぞれ形成してい
るため、それらを形成する場合、規制せんとする
方向の精度のみ確保すれば足り、コンロツドおよ
び軸受メタルを容易に製作することができ、しか
も、大端部の分割面の面粗度や位置が多少変化し
ても、軸受メタルの確実な位置決めを行なうこと
が可能となつた。"Effects of the Invention" As explained above, according to the bearing metal positioning structure in the fracture-split connecting rod according to the present invention, a pair of bearing metals and a large end portion of the connecting rod are provided with a pair of screws that restrict the movement of the bearing metal in the axial direction. A pair of protrusions and grooves, and a pair of protrusions and grooves that restrict movement of the bearing metal in the circumferential direction, are provided separately and independently, and the protrusions and grooves have a locking surface perpendicular to the axis and a pair of protrusions parallel to the mating surface. Since each locking surface is formed individually, when forming them, it is only necessary to ensure accuracy in the direction of restriction, making it possible to easily manufacture connecting rods and bearing metals. Even if the surface roughness or position of the split surface changes somewhat, it is now possible to reliably position the bearing metal.
第１図〜第４図は従来のコンロツドにおける軸
受メタルの位置決め構造を一例を示すもので、第
１図はコンロツドの正面図、第２図はキヤツプ側
の平面図、第３図はロツド側の底面図、第４図は
大端部の縦断面図、第５図〜第１１図は本発明の
一実施例を示すもので、第５図はコンロツドおよ
び軸受メタルの分解斜視図、第６図は下側軸受メ
タル半体の平面図、第７図は第６図の−線に
沿う断面図、第８図は第７図の円部の拡大断面
図、第９図はコンロツドの正面図、第１０図はコ
ンロツドの一部を省略した縦断面側面図、第１１
図は第９図のXI−XI線に沿う矢視断面図である。
７……コンロツド、８……大端部、８ａ……大
端部半体、８ｂ……大端部半体、９……小端部、
１０……幹部、１１……軸受メタル、１１ａ……
軸受メタル半体、１１ｂ……軸受メタル半体、１
４……第１の突起、１４ａ，１４ｂ，１５ａ，１
５ｂ，２３ａ，２３ｂ，２４ａ，２４ｂ……係止
面、１５……第２の突起、２３……第１の溝、２
４……第２の溝、Ｌ……分割ライン。
Figures 1 to 4 show an example of the positioning structure of the bearing metal in a conventional connecting rod. Figure 1 is a front view of the connecting rod, Figure 2 is a plan view of the cap side, and Figure 3 is a plan view of the rod side. A bottom view, FIG. 4 is a vertical sectional view of the large end, FIGS. 5 to 11 show an embodiment of the present invention, FIG. 5 is an exploded perspective view of the connecting rod and bearing metal, and FIG. 6 is a longitudinal sectional view of the large end. is a plan view of the lower bearing metal half, FIG. 7 is a sectional view taken along the - line in FIG. 6, FIG. 8 is an enlarged sectional view of the circular part in FIG. 7, and FIG. 9 is a front view of the conrod. Figure 10 is a vertical cross-sectional side view with a part of the cooking rod omitted;
The figure is a sectional view taken along the line XI-XI in FIG. 9. 7...Conn rod, 8...Big end, 8a...Big end half, 8b...Big end half, 9...Small end,
10... Executive, 11... Bearing metal, 11a...
Bearing metal half body, 11b...Bearing metal half body, 1
4...First protrusion, 14a, 14b, 15a, 1
5b, 23a, 23b, 24a, 24b...Locking surface, 15...Second protrusion, 23...First groove, 2
4...Second groove, L...Dividing line.
Claims (1)
部８（８ａ，８ｂ）に一対の半円弧状の軸受メタ
ル１１（１１ａ，１１ｂ）を取り付けるための位
置決め構造であつて、前記軸受メタル同士の合わ
せ面には、それぞれ該軸受メタルの軸線方向の移
動を規制するための第１の突起１４が軸線方向の
中央部に半径方向外方へ突出して設けられるとと
もに、同軸受メタルの周方向の移動を規制するた
めの第２の突起１５が、軸線方向の端部に半径方
向外方へ突出して設けられ、 前記第１の突起は前記軸受メタルの軸線に平行
な線l1を折曲中心として外方へ折り曲げられて設
けられるとともに、該第１の突起の側面には前記
軸線に直交する係止面１４ａ，１４ｂが形成さ
れ、 前記第２の突起は前記合わせ面に直交する線l2
を折曲中心として外方に切り起こされて設けられ
るとともに、該第２の突起の前記合わせ面の反対
側の側面には該合わせ面に平行な係止面１５ａ，
１５ｂが形成され、 前記コンロツド大端部の内面には前記軸受メタ
ルの第１、第２の突起に対応して、軸線方向の中
央部に第１の溝２３が、また軸線方向の端部に第
２の溝２４がそれぞれ設けられ、 該第１の溝には前記第１の突起の係止面に対応
する係止面２３ａ，２３ｂが前記コンロツド大端
部の軸線に直交して形成され、第２の溝には前記
第２の突起の係止面に対応する係止面２４ａ，２
４ｂが前記コンロツド大端部の合わせ面に平行に
形成されていることを特徴とする破断分割型コン
ロツドにおける軸受メタルの位置決め構造。[Scope of Claims] 1. A positioning structure for attaching a pair of semicircular arc-shaped bearing metals 11 (11a, 11b) to the large end 8 (8a, 8b) of a connecting rod that is divided into two by breaking. , a first protrusion 14 is provided on the mating surface of the bearing metals, protruding outward in the radial direction at the center in the axial direction, for regulating the movement of the bearing metals in the axial direction, respectively. A second protrusion 15 for regulating movement of the metal in the circumferential direction is provided at the end in the axial direction so as to protrude outward in the radial direction, and the first protrusion is arranged along a line l parallel to the axis of the bearing metal. 1 as a bending center, and locking surfaces 14a and 14b perpendicular to the axis are formed on the side surfaces of the first projection, and the second projection is formed on the mating surface. orthogonal lines l 2
The second protrusion is cut and raised outward with the bending center as the center, and a locking surface 15a parallel to the mating surface is provided on the side surface opposite to the mating surface of the second protrusion.
15b is formed on the inner surface of the large end of the connecting rod, and a first groove 23 is formed at the center in the axial direction, corresponding to the first and second protrusions of the bearing metal, and a first groove 23 is formed at the end in the axial direction. second grooves 24 are respectively provided, locking surfaces 23a and 23b corresponding to the locking surfaces of the first protrusion are formed in the first grooves to be perpendicular to the axis of the connecting rod large end; The second groove has locking surfaces 24a, 2 corresponding to the locking surfaces of the second protrusion.
4b is formed parallel to the mating surface of the large end of the connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13836685A JPS622016A (en) | 1985-06-25 | 1985-06-25 | Construction of positioning bearing metal in breakingly dividing type connecting rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13836685A JPS622016A (en) | 1985-06-25 | 1985-06-25 | Construction of positioning bearing metal in breakingly dividing type connecting rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS622016A JPS622016A (en) | 1987-01-08 |
| JPH0219328B2 true JPH0219328B2 (en) | 1990-05-01 |
Family
ID=15220248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13836685A Granted JPS622016A (en) | 1985-06-25 | 1985-06-25 | Construction of positioning bearing metal in breakingly dividing type connecting rod |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS622016A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6312159B1 (en) | 1998-12-16 | 2001-11-06 | Honda Giken Kogyo Kabushiki Kaisha | Bearing metal positioning structure in a split connecting rod |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5234705B2 (en) * | 2006-09-04 | 2013-07-10 | Ｎｔｎ株式会社 | Roller bearing |
| JP5133537B2 (en) * | 2006-09-04 | 2013-01-30 | Ｎｔｎ株式会社 | Roller bearing, camshaft support structure, internal combustion engine, and method of assembling roller bearing |
| EP2060808B1 (en) | 2006-09-04 | 2012-10-10 | NTN Corporation | Roller bearing, cam shaft support structure, internal combustion engine, and method of assembling roller bearing |
| JP5234704B2 (en) * | 2006-09-04 | 2013-07-10 | Ｎｔｎ株式会社 | Roller bearing, camshaft support structure and internal combustion engine |
| JP2008057737A (en) * | 2006-09-04 | 2008-03-13 | Ntn Corp | Roller bearing, camshaft support structure and internal combustion engine |
| US8251590B2 (en) * | 2009-05-29 | 2012-08-28 | Cummins Intellectual Properties, Inc. | Anti-rotation bearing assembly and bearing |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5371741A (en) * | 1976-12-08 | 1978-06-26 | Rolls Royce Motors Ltd | Bearing |
| JPS56160315U (en) * | 1980-04-30 | 1981-11-30 |
-
1985
- 1985-06-25 JP JP13836685A patent/JPS622016A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6312159B1 (en) | 1998-12-16 | 2001-11-06 | Honda Giken Kogyo Kabushiki Kaisha | Bearing metal positioning structure in a split connecting rod |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS622016A (en) | 1987-01-08 |
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