JPH0318050B2 - - Google Patents
Info
- Publication number
- JPH0318050B2 JPH0318050B2 JP11754185A JP11754185A JPH0318050B2 JP H0318050 B2 JPH0318050 B2 JP H0318050B2 JP 11754185 A JP11754185 A JP 11754185A JP 11754185 A JP11754185 A JP 11754185A JP H0318050 B2 JPH0318050 B2 JP H0318050B2
- Authority
- JP
- Japan
- Prior art keywords
- rod
- flexible member
- shaped body
- cross
- annular
- 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
Links
- 238000013459 approach Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 238000005452 bending Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Vehicle Body Suspensions (AREA)
Description
〔産業上の利用分野〕
本発明はトルクロツド、コネクテイングロツド
などに用いるのに適した可撓部材に関する。
〔従来の技術〕
トルクロツドは後輪二軸型トラツクのアクスル
本体とトラニオンブラケツトを連結し、アクスル
傾角をコントロールする機能を有する部品であ
る。
このトルクロツドは、従来から鋼製パイプの両
端に、貫通孔を有する環状部材を溶接したものが
使用されていた。しかし最近では軽量化と原価低
減を目的として、一体構造の鋳造製トルクロツド
が採用されている。
ところが、過負荷が作用した時の変形能の点で
鋳造製トルクロツドは前者に比べて劣るという問
題が指摘されている。
これは車両が道路の縁石に乗り上げた場合、あ
るいは運転者がパンク修理のためにトルクロツド
にジヤツキを当てるなど特殊な状況ではあるが、
このような状況でも充分な変形能を有することが
望ましいところである。
〔発明が解決しようとする問題点〕
鋳造製トルクロツドは桿状体の断面形状をＨ形
としたものが最も一般的であり、しかも桿状体の
全長にわたつて同一断面形状で同一断面積を有す
る構造であつた。
従つて中央部に過負荷が作用すると、一定量変
形した後、中央部の局部的な伸び率が材料固有の
伸び率に一致した時点で亀裂が発生し所望の変形
量を得ることができない。
本発明の目的は、製品重量を増大することな
く、引張荷重、圧縮荷重、曲げ過重などに対して
降伏域の範囲を拡大し得る可撓部材を提供するに
ある。
〔問題点を解決するための手段〕
本発明の可撓部材は、貫通孔を有する環状部材
を両端に備え、この環状部材を桿状体にて接続せ
る可撓部材であつて、上記桿状体は任意の部位に
おける断面積を一定に保ち、断面係数は中央部で
最大となし、両端の環状部材に近づくにつれて次
第に小さくなる構成としたものである。
〔実施例〕
本発明による可撓部材を図面に基いてさらに詳
細に説明する。第１図は可撓部材の断面図、第２
図は正面図、第３，４，５図はそれぞれ第２図の
Ａ〜Ａ断面図、Ｂ〜Ｂ断面図、Ｃ〜Ｃ断面図であ
る。
(1) 試料
(1) 形状は第１〜５図に示す通りで孔間中心距
離は690mmである。
(2) 材料は従来品、本発明品とも同一材料で球
状黒鉛鋳鉄品（FCD40）を用いた。
(3) 断面積および断面係数
[Industrial Field of Application] The present invention relates to a flexible member suitable for use in torque rods, connecting rods, and the like. [Prior Art] A torque rod is a component that connects the axle body and trunnion bracket of a rear two-axle type truck and has the function of controlling the axle inclination angle. Conventionally, this torque rod has been made by welding annular members having through holes to both ends of a steel pipe. However, recently, a one-piece cast torque rod has been adopted for the purpose of reducing weight and cost. However, it has been pointed out that cast torque rods are inferior to the former in terms of deformability when overload is applied. This happens in special situations, such as when a vehicle runs onto a road curb, or when a driver hits a torque rod to repair a puncture.
It is desirable to have sufficient deformability even under such circumstances. [Problems to be solved by the invention] Cast torque rods most commonly have a rod-shaped body with an H-shaped cross-section, and have a structure in which the rod-shaped body has the same cross-sectional shape and the same cross-sectional area over the entire length. It was hot. Therefore, when an overload is applied to the central portion, after a certain amount of deformation, cracks occur when the local elongation rate of the central portion matches the elongation rate specific to the material, making it impossible to obtain the desired amount of deformation. An object of the present invention is to provide a flexible member that can expand its yield range against tensile loads, compressive loads, bending loads, etc., without increasing the weight of the product. [Means for Solving the Problems] The flexible member of the present invention is a flexible member that includes an annular member having a through hole at both ends and connects the annular members with a rod-shaped body, the rod-shaped body being The cross-sectional area at any part is kept constant, the section modulus is maximum at the center, and gradually decreases as it approaches the annular members at both ends. [Example] The flexible member according to the present invention will be explained in more detail based on the drawings. Figure 1 is a sectional view of the flexible member, Figure 2 is a cross-sectional view of the flexible member;
The figure is a front view, and FIGS. 3, 4, and 5 are sectional views from A to A, from B to B, and from C to C of FIG. 2, respectively. (1) Sample (1) The shape is as shown in Figures 1 to 5, and the center distance between holes is 690 mm. (2) The same material was used for both the conventional product and the product of the present invention, which was spheroidal graphite cast iron (FCD40). (3) Cross-sectional area and section modulus
以上の説明で明らかなように、本発明の可撓部
材は、下記のような多くの優れた効果を有するも
のである。
(1) 桿状体は各部の断面積が同一であるため製品
重量は変らない。
(2) 桿状体は各部の断面積が同一であるため軸方
向の引張荷重、圧縮荷重に対して応力分布は均
等である。
(3) 断面係数は桿状体の中央で最大であり、環状
体に近づくにつれて小さくなつているので、曲
げ荷重に対して降伏域の範囲が広く可撓部材と
して、より均一な降伏変形を起すことになり亀
裂発生までに大きな変形量を得ることができ
る。
As is clear from the above description, the flexible member of the present invention has many excellent effects as described below. (1) The cross-sectional area of each part of the rod-shaped body is the same, so the product weight does not change. (2) Since the cross-sectional area of each part of the rod-shaped body is the same, the stress distribution is uniform for tensile and compressive loads in the axial direction. (3) The section modulus is maximum at the center of the rod and decreases as it approaches the annular body, so the yield range is wide against bending loads, and as a flexible member, more uniform yield deformation occurs. Therefore, a large amount of deformation can be obtained before cracking occurs.
第１図は本発明による可撓部材の断面図、第２
図は正面図、第３，４，５図はそれぞれ第２図の
Ａ〜Ａ断面図、Ｂ〜Ｂ断面図、Ｃ〜Ｃ断面図、第
６図は曲げ試験結果を示すものである。
１，２：環状部材、３，４：貫通孔、５：桿状
体。
FIG. 1 is a sectional view of a flexible member according to the present invention;
The figure is a front view, FIGS. 3, 4, and 5 are sectional views from A to A in FIG. 2, sectional views from B to B, and sectional views from C to C, respectively, and FIG. 6 shows the results of a bending test. 1, 2: annular member, 3, 4: through hole, 5: rod-shaped body.
Claims (1)
状部材を桿状体にて接続せる可撓部材において、
上記桿状体は任意の部位における断面積を一定に
保ち、断面係数は中央部で最大となし、両端の環
状部材に近づくにつれて次第に小となすことを特
徴とする可撓部材。1. A flexible member having an annular member having a through hole at both ends and connecting the annular members with a rod-shaped body,
A flexible member characterized in that the rod-shaped body maintains a constant cross-sectional area at any part, and has a section modulus that is maximum at the center and gradually decreases as it approaches the annular members at both ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11754185A JPS61278615A (en) | 1985-05-30 | 1985-05-30 | Flexible member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11754185A JPS61278615A (en) | 1985-05-30 | 1985-05-30 | Flexible member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61278615A JPS61278615A (en) | 1986-12-09 |
| JPH0318050B2 true JPH0318050B2 (en) | 1991-03-11 |
Family
ID=14714348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11754185A Granted JPS61278615A (en) | 1985-05-30 | 1985-05-30 | Flexible member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61278615A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03130425U (en) * | 1990-04-11 | 1991-12-27 | ||
| BRPI1103745A2 (en) * | 2011-08-30 | 2013-08-13 | Whirlpool Sa | reciprocating compressor connecting rod |
-
1985
- 1985-05-30 JP JP11754185A patent/JPS61278615A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61278615A (en) | 1986-12-09 |
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