external shoe brake的意思|示意

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External shoe brake（外踏板制动器）是一种有效的车辆防滑制动器，它是一种可以把车辆放在滑行状态中，而不会引起轮胎滑动的装置。外踏板制动器有两个主要类型：摩擦式和电磁式。摩擦式是由操纵杆操作踏板的机构，当操纵杆操作时，离合器踏板会向驾驶室底板施加压力，从而实现制动；而电磁式则是通过控制电器实现的，当控制电器被吸引到手柄时，离合器踏板会被拉动，从而实现制动。

External shoe brakes can be used to prevent the vehicle from slipping in slippery surfaces such as ice, snow, or even wet pavement. When the vehicle's wheels are going to slip due to the slippery surface, the external shoe brakes will engage, and the vehicle will stop. It is also useful for vehicles that are pulling a load, as the load can shift when the vehicle suddenly stops, causing the driver to react quickly in order to avoid an accident.

外踏板制动器可以用来预防车辆在冰、雪或者潮湿的路面滑行。当车辆的轮子要因滑动的路面而滑行时，外踏板制动器会被激活，车辆就会停下来。这对于拉货车也很有用，因为当车辆突然停下来时，货物可能会发生偏移，驾驶员必须迅速反应以避免事故的发生。

External shoe brakes are typically used on light vehicles such as motorcycles and scooters. However, they can also be found on some heavier vehicles, such as trucks and buses. This type of braking system is usually used in combination with other types of braking systems, such as disc brakes, to ensure maximum stopping power.

外踏板制动器通常用于摩托车和踏板车等轻型车辆上。但是，它们也可以在一些更重的车辆上找到，如卡车和公共汽车。这种制动系统通常与其他类型的制动系统，如盘式制动器，结合使用，以确保最大的制动力。