行业组件数据 · 2026

上拉杆

A top link is a critical adjustable component in implement hitch systems that controls implement pitch and depth for optimal agricultural performance.

技术定义与适配语境
典型 上拉杆 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。

The top link is a structural component in three-point hitch systems that connects the tractor's upper hitch point to the implement's upper attachment point. It functions as an adjustable strut that regulates the angular position (pitch) of attached implements relative to the tractor, directly influencing implement depth, leveling, and ground engagement. Available in fixed-length, manually adjustable, and hydraulic variants, it transmits both compressive and tensile forces during operation while maintaining precise implement orientation.

组件规格

定义
The top link is a structural component in three-point hitch systems that connects the tractor's upper hitch point to the implement's upper attachment point. It functions as an adjustable strut that regulates the angular position (pitch) of attached implements relative to the tractor, directly influencing implement depth, leveling, and ground engagement. Available in fixed-length, manually adjustable, and hydraulic variants, it transmits both compressive and tensile forces during operation while maintaining precise implement orientation.
工作原理
The top link operates on mechanical linkage principles, creating a rigid connection between tractor and implement. By adjusting its length (manually via turnbuckle mechanisms or hydraulically), it alters the implement's pitch angle relative to ground level. This adjustment changes the angle of attack for ground-engaging tools, controlling penetration depth and working angle. During operation, it transfers forces from implement to tractor frame while maintaining geometric stability through the three-point hitch triangle.
材料
High-strength carbon steel (AISI 1045/4140) with yield strength ≥ 450 MPahot-dip galvanized or powder-coated for corrosion resistance. Hydraulic variants incorporate chromed piston rods (hardness 55-60 HRC) and precision-machined cylinder barrels.
Thread Type
ISO Metric Trapezoidal (Tr) or ACME
Length Range
400-1200 mm
Pin Diameter
25.4 mm (1") or 31.75 mm (1.25")
Load Capacity
15-50 kN (static)
Adjustment Range
±100 mm from nominal length
Working Pressure
Up to 20 MPa (hydraulic models)
标准
ISO 5675ISO 730-1ASABE S217.12DIN 9674

行业分类与别名

上拉杆 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

Thread wear from inadequate lubrication->Slippage during operation leading to depth inconsistency->Implement scheduled lubrication protocol using high-pressure grease
Material fatigue from cyclic loading->Fracture at stress concentration points->Design with radiused transitions and periodic non-destructive testing
Corrosion in chemical/fertilizer exposure->Reduced cross-sectional strength and eventual failure->Specify hot-dip galvanization or stainless steel components for corrosive environments

工业生态与工程逻辑

0
Over-tightening causing thread damage
1
Fatigue failure from cyclic loading
2
Corrosion in agricultural environments
3
Improper length causing implement instability

合规与检测

tolerance
Length adjustment: ±1.5 mm per 100 mm, Pin holes: H8 tolerance, Straightness: 0.5 mm per 300 mm
test method
Static load test to 150% rated capacity, cyclic fatigue test (50,000 cycles at 80% load), corrosion resistance per ISO 9227 salt spray test

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 top link in hitch systems?

The top link controls implement pitch angle and working depth by adjusting its length, ensuring proper ground engagement and level operation.

How do I select the correct top link length?

Measure distance between tractor's upper hitch point and implement's attachment point at desired working angle, then select adjustable link covering this range with 10-15% margin.

What maintenance does a top link require?

Regular lubrication of threaded sections, inspection for bending/cracks, cleaning of hydraulic connections (if applicable), and periodic torque checks on locking mechanisms.

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CNFX Industrial Component Index · 机械和设备制造

数据基础

CNFX 制造商资料、技术分类、公开产品信息和持续合理性检查。

初步技术归类
本页用于结构化准备研究、RFQ 和供应商评估,不替代买方自己的供应商资质审查、标准核验和技术批准。

请求制造能力信息: 上拉杆

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URN:CNFX:ME:UNIT:TOP_LINK