磨损严重的链轮上的新链条,通常在正常使用里程的一半后就会达到更换阈值。链条和链轮是一个系统——它们共同磨损、共同失效,因此也应该同时更换。本指南将解释其工作原理、检查方法,以及链轮何时可以合理地重复使用。
一个 摩托车链条和链轮 set wears as a matched system. As the chain’s pin-bushing joints elongate — the gap between adjacent pins growing by fractions of a millimetre — the chain’s effective pitch increases slightly. A correctly-sized sprocket’s tooth spacing is designed for the chain’s nominal pitch. As the chain elongates, the rollers no longer seat perfectly in the tooth valleys; instead they ride progressively higher up the tooth flanks. This changes the contact geometry and accelerates tooth wear in a specific pattern: the leading face of each tooth wears faster than the trailing face, eventually producing the characteristic “hook” profile of a worn sprocket.
Once the sprocket has developed this hook profile, fitting a new chain on the same sprockets reverses the problem: the new chain’s rollers — seated at nominal pitch spacing — now engage sprocket teeth shaped for a longer chain. The hook-shaped teeth act as ramps under chain tension, lifting the rollers rather than seating them, and the new chain is pulled into a wear pattern within the first few thousand kilometres that mirrors the old chain’s elongated condition.
In practical terms: a new quality chain on correctly-profiled sprockets can be expected to reach 15,000–20,000+ km (sealed type) before elongation requires replacement. The same new chain on hook-worn sprockets often reaches replacement threshold in 6,000–8,000 km. The sprockets effectively halve the chain’s service life — and the money saved by not replacing the sprockets is spent on more frequent chain replacements.
正确:滚子位于齿槽内,载荷均匀分布在齿面上。
匹配更换:新链条配新链轮——系统从正确的几何结构开始。
前链轮的齿数较少(通常为13-17齿),转速也比后链轮快。由于前链轮的每个齿每公里与链条的啮合次数比后链轮的齿更多,因此前链轮的磨损速度通常是后链轮的2-3倍。对于高里程的公路摩托车来说,前链轮几乎总是与链条同时需要更换,而且通常前链轮甚至比后链轮更早需要更换。
后链轮齿数更多(通常为 40-50 个),转速比前链轮慢——每个齿每公里与链条啮合的次数更少。因此,后链轮的使用寿命通常比前链轮长,但随着时间的推移,它们都会出现相同的钩齿磨损模式。对于后链轮齿数较少或骑行风格特别激烈的车辆,后链轮的磨损程度可能与前链轮同时达到更换阈值。
实用规则: 每次更换链条时,前链轮也应同时更换。后链轮每更换一到两次链条后更换一次,或者当齿部检查发现钩爪磨损时也应更换。这种方法避免了新链条与磨损的链轮同时使用的情况,而无需每次保养周期都更换所有三个部件。
Sprocket inspection requires viewing the tooth profile from the side — not the face. The side view shows the tooth tip geometry and the asymmetry of wear between leading and trailing faces. A new tooth has a symmetrical, slightly rounded profile. A worn tooth has a pronounced “hook” on the leading face (the face the chain roller pushes against under drive) with the trailing face remaining relatively unworn.
| 设想 | 链 | 前链轮 | 后链轮 |
|---|---|---|---|
| 链条已达到伸长阈值,链轮状况良好 | 代替 | 代替 | 检查——如有任何可见的钩子磨损,请更换。 |
| 链条位于门槛处,两个链轮均有钩状磨损。 | 代替 | 代替 | 代替 |
| 第二次更换链条——第一条链条行驶里程超过20000公里 | 代替 | 代替 | 代替 |
| 仅因污染或事故损坏导致的链条故障 | 代替 | 代替 | 仔细检查——如果里程数低,可能可以重复使用。 |
| 购买前检查——所有部件使用年限未知 | 代替 | 代替 | 代替 |
| 齿轮传动比变更 | 代替 | 替换(新比例) | 替换(新比例) |
从经济角度来看,更换这三者是合理的: 例如,在一台机器上,更换链条的费用为 50,000 韩元,前后链轮的费用为 60,000 韩元,那么整套设备的总费用为 110,000 韩元。如果磨损的链轮在 8,000 公里时就达到更换阈值,而不是 18,000 公里,那么每更换一次链轮,就需要更换 2.25 次链条,而不是一次。如果不更换链轮,18,000 公里的总费用为:2.25 × 50,000 = 112,500 韩元——比包含更换链轮在内的整套设备的总费用还要高。
Sprockets must match the chain in both pitch and inner width. A 520-pitch chain will not correctly seat in a 525-pitch sprocket’s tooth valleys — the narrower roller sits loosely between the wider tooth faces rather than contacting them. A 428-pitch sprocket will not engage a 520-pitch chain at all — the tooth spacing is a different value entirely (12.70 mm vs 15.875 mm).
在同一尺寸系列(例如所有 520 节距链条和链轮)中,不同的密封型(520 标准型、520H-O 型、520H-X 型)都具有相同的 JIS B 1801 节距和内宽,并且与相同的 520 节距链轮兼容。您可以将 520 标准型链条升级到 520H-X 型,而无需更换链轮——型号后缀改变的是密封类型和链片厚度,而不是链轮的兼容尺寸。
订购替换链条和链轮组时,请确认:(1)节距与现有链条或维修手册上的 OEM 规格相符;(2)两个链轮的齿数是否符合您的机器或您预期的传动比变化;(3)前链轮的孔径和花键数是否与您特定型号的副轴相符。
Both motorcycle chains and matching sprockets are produced in Korea Ever-Power’s five facilities. Chains are batch tensile-tested and dimensionally verified. Sprockets are tooth-profile checked and gear-cut to matched pitch tolerances for each chain family.
韩国永力摩托车链条有限公司——通过ISO 9001认证 · 拥有5个生产基地
为了确保链条和链轮的节距匹配,并简化售后服务,请同时订购链条和链轮。3-7个工作日内发货。请告知我们您的摩托车品牌、型号和年份,以便我们在下单前确认链条规格和链轮齿数。
编辑:Cxm