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- 外齿圈：外圈的直齿结构，与主动齿轮啮合，实现扭矩传递与转速转换，齿形采用优化的压力角设计，承载能力强、噪音低。
- 内结合齿：内圈的花键 / 结合齿结构，与同步器齿套啮合，实现换挡时的刚性连接，齿形经高频淬火处理，耐磨抗冲击。
- 安装内孔：中心的光孔，通过轴承 / 衬套安装在副轴 / 主轴上，实现齿轮的旋转支撑。
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核心作用
作为变速箱的从动齿轮，它与主动齿轮啮合，实现减速增扭；同时配合同步器齿套，完成换挡过程中的转速同步与档位锁定，是变速箱里同时承受径向载荷和轴向冲击的关键部件之一。
✨ 产品特点
- 高承载齿形设计：采用高强度合金钢锻造，齿面经渗碳淬火 + 磨齿工艺，硬度高、接触疲劳强度好，可承受矿用自卸车重载起步的大扭矩冲击。
- 高精度配合公差：内结合齿与同步器齿套配合间隙控制精准，换挡顺滑无卡滞，避免跳档 / 脱档故障。
- 抗冲击优化结构：齿根圆角加大设计，降低应力集中，减少重载工况下的齿根断裂风险。
- 强通用性：适配法士特 8DS260 系列 8 档变速箱，与之前的一档主动齿轮、同步器齿套、变速箱顶盖总成完美匹配。
🚚 适配场景
- 宽体矿用自卸车：同力、徐工、临工等品牌搭载 8DS260 变速箱的车型
- 干线物流重卡：东风天龙、陕汽德龙、重汽豪沃等搭载法士特 8 档变速箱的重载牵引车 / 自卸车
- 工程车辆：混凝土搅拌车、港口牵引车等频繁换挡、重载起步工况
⚠️ 常见故障与维护
- 常见故障：齿面磨损 / 点蚀、打齿、内结合齿磨损、齿轮松动异响
- 故障原因：长期重载冲击、润滑油不足 / 油品劣化、同步器失效导致强行啮合
- 维护建议：定期更换变速箱油，检查齿轮啮合间隙；换挡时避免猛推硬挂，减少齿轮冲击磨损
This is the driven gear (constant mesh gear / synchronizer gear) for the Fast 8DS260 series transmission. It is a core component of the transmission mechanism, used in conjunction with the previously mentioned 1st-speed driving gear and synchronizer sleeve to form the power transmission chain under heavy-duty conditions.
- High-load-bearing tooth profile design: Forged from high-strength alloy steel, the gear teeth are carburized, quenched, and ground for high hardness and good contact fatigue strength, capable of withstanding high-torque impacts during heavy-load starting of mining dump trucks.
- High-precision fit tolerances: The fit clearance between the internal coupling teeth and the synchronizer sleeve is precisely controlled, ensuring smooth and jamming-free shifting to avoid gear jumping/slipping faults.
- Impact-resistant optimized structure: Enlarged tooth root fillets reduce stress concentration and minimize the risk of tooth root fracture under heavy-duty conditions.
- Strong compatibility: Adapted to the Fast 8DS260 series 8-speed transmission, perfectly matching the previously mentioned 1st-speed driving gear, synchronizer sleeve, and transmission top cover assembly.
