[技术]建立自己的躺式自行车（十三） | 科技论坛

点击进入：建立自己的躺式自行车（十二）


Note 注意
During this discussion I use both metric and SAE measurements. 在这一讨论中我同时使用公制和SAE测量。 The reason is obvious, we Americans are still stuck with SAE while the majority of bicycle components are metric. 原因是显而易见的，我们美国人仍然坚持与SAE的组成部分，而大部分的自行车是公制。
 Introduction 介绍
Bicycle hub axles are designed so that the frame dropouts support each axle-end. Obviously, this poses a grave concern, as a tricycle requires that a single ended axle support each of the two front wheels.自行车车轴枢纽的设计，使辍学相互支持的框架轴结束。显然，这构成了严重关切，要求作为一个三轮车轴支持单端每两个轮子前面。 Modifying an existing bicycle hub is a very challenging issue for the first time trike builder.修改现有的自行车枢纽是一次非常具有挑战性的问题三轮车建设者为第一。 For this reason I have created instructions for modifying a standard bicycle hub for single ended axle (or commonly referred to as the Stub Axle ).基于这个原因，我已经结束车轴创造指示枢纽标准修改单自行车（或通常称为轴作为存根 ）。 Armed with this information, the home builder or frame builder enthusiast shall discover that this hub modification is actually an easy operation.信息武装对此，住房建筑商或框架建设者爱好者将发现这其实是一个枢纽修改操作方便。
Axles 车轴
The diameter of a conventional bicycle hub axle is normally too small for a stub axle. These axles are commonly 10 mm in diameter.轴直径传统自行车枢纽通常很小，但存根轴。这些轴直径通常10毫米英寸 For a stub axle, the diameter is increased to 12-mm or greater.对于一个存根轴，直径增大到12毫米或更大。 This added diameter thickness is required because the axle is supported on a single end and undergoes a tremendous amount of cantilevered force.这将直径厚度是必要的，因为轴是支持单端和一个经历了一个悬臂式的巨大数额。 It should also be mentioned that the longer the axle, the more likely it is to flex and place additional stress at the axle steering knuckle termination.还应提及的是，时间越长，轴，越有可能是额外的压力在桥转向关节Flex和终止的地方。
Stub axles are constructed of carbon steel.存根轴构造碳钢。 Experimentation has suggested that #5 hardness is recommended as it is strong enough to retain its elastic properties during overstressing and does not break easily.实验已表明，＃5硬度很容易推荐，因为它是强大到足以在保持其弹性性能的过分强调，不休息。 High carbon steel is not suggested, as it is brittle, having a tendency to crack rather than bend when overstressed.高碳钢不建议，因为它是脆，有一种倾向，而不是打击时过分弯曲。 Stub axle fabricated from 4130 CroMo are also recommended.存根轴捏造也从4130 CroMo建议。
The nominal length of a 12 mm axles when used with a Sachs VT500 drum hub is just under 6 inches in length.鼓枢纽名义长度1 VT500 12萨克斯毫米车轴当用于一个是长度不到6英寸英寸 A 12x 1.25 (or 1.75) pitch thread is cut 1.5 inches down the length of one end of the axle, while the other end is threaded 1 inch with a 12.x1.25 pitch thread. All-Thread can be substituted if it consist of the same properties as a #5 hardness fastener. 12倍1.25（或1.75）牙轴是削减了1.5英寸的长度，最后一个，而另一端螺纹牙1英寸，12.x1.25。全部线程，如果它可以代替组成5紧固件的硬度相同的属性作为一个＃。
Bearing Requirements 轴承需求
The increased diameter of the axle may require larger bearings for the hub.该轴直径增加，可能需要为中心的大型轴承。 Therefore, the hub must have provisions for bearing replacement.因此，该中心必须有规定更换轴承。 If a different size bearing is required the bearing cups must be removed from the hub.如果需要不同大小的轴承轴承杯必须删除从枢纽。 Once removed, a suitable cartridge bearing may be substituted.一旦取消，一个合适的墨盒轴承可取代。 However, the hub may require machining to accommodate the new bearing size.但是，集线器可能要求加工，以适应新的轴承尺寸。