行业组件数据 · 2026

连杆

A connecting rod is a rigid mechanical component that transmits motion between a piston and a crankshaft in an oscillation mechanism.

技术定义与适配语境
典型 连杆 会按材料、尺寸公差、适配关系和失效风险在 机械和设备制造 中评估。

In an oscillation mechanism, the connecting rod is a critical load-bearing component that converts the reciprocating linear motion of the piston into the rotational motion of the crankshaft. It acts as a structural link, transferring force and motion while withstanding significant compressive, tensile, and bending stresses. Its design ensures precise alignment and minimal energy loss during the conversion process.

组件规格

定义
In an oscillation mechanism, the connecting rod is a critical load-bearing component that converts the reciprocating linear motion of the piston into the rotational motion of the crankshaft. It acts as a structural link, transferring force and motion while withstanding significant compressive, tensile, and bending stresses. Its design ensures precise alignment and minimal energy loss during the conversion process.
工作原理
The connecting rod operates on the principle of rigid-body kinematics. One end (the small end) is connected to the piston pin, allowing it to pivot as the piston reciprocates. The other end (the big end) is connected to the crankshaft journal, rotating with the crankshaft. As the piston moves, the angular displacement of the connecting rod transforms linear displacement into rotational torque at the crankshaft.
材料
Typically forged steel (e.g.AISI 4340EN19) or aluminum alloy (e.g.7075-T6) for high strength-to-weight ratio. Advanced applications may use titanium alloys or composite materials. Surface treatments include shot peeningnitridingor coating for wear resistance.
Weight
0.5-5.0 kg
Fatigue Strength
300-500 MPa
Big End Bore Diameter
40-120 mm
Small End Bore Diameter
20-50 mm
Length (Center-to-Center)
100-500 mm
Ultimate Tensile Strength
800-1200 MPa
标准
ISO 13535DIN 7526

行业分类与别名

连杆 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Material defect or improper heat treatment->Fracture under high-stress cycles->Implement strict material certification, non-destructive testing (NDT), and quality control during manufacturing.
Insufficient lubrication at bearing surfaces->Accelerated wear, overheating, and seizure->Design reliable lubrication systems, use wear-resistant coatings, and schedule regular maintenance.
Dynamic imbalance or misalignment during assembly->Increased vibration, noise, and premature failure->Precision balancing, alignment checks during installation, and use of alignment tools.

工业生态与工程逻辑

0
Fatigue failure due to cyclic loading
1
Bearing wear at connection points
2
Misalignment causing binding or seizure
3
Corrosion in harsh environments

合规与检测

tolerance
Dimensional tolerances per ISO 2768-m, bore concentricity within 0.02 mm, surface finish Ra 0.8-1.6 μm
test method
Fatigue testing per ISO 13535, hardness testing (Rockwell C), magnetic particle inspection for cracks, coordinate measuring machine (CMM) for geometry

制造该组件的工厂

来自 CNFX 组件能力表的相关制造商资料。

制造商列表用于前期研究和供应商能力理解,不代表认证、排名或交易担保。

采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

What is the primary function of a connecting rod in an oscillation mechanism?

Its primary function is to transmit force and motion from the reciprocating piston to the rotating crankshaft, converting linear motion into rotational torque.

Why are connecting rods often made from forged steel?

Forged steel provides high strength, durability, and fatigue resistance necessary to withstand cyclic loads and stresses in oscillation mechanisms.

How does the length of a connecting rod affect mechanism performance?

Rod length influences the stroke ratio, piston velocity, and side thrust, affecting efficiency, vibration, and torque characteristics of the mechanism.

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CNFX Industrial Component Index · 机械和设备制造

数据基础

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初步技术归类
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URN:CNFX:ME:UNIT:CONNECTING_ROD