梯形牙牙嵌式离合器因具有承载能力强、可消除牙间周向间隙,结构简单、操作方便等优点,因而广泛应用于低速大扭矩操纵系统。但目前由于图纸上对这种离合器齿部尺寸标注不当,往往引起争议甚至出现废品,现将有关问题说明于后. 1.错误的标注方法图1、图2及图3所示标注方法存在以下一些问题: (1)图1中,工人往往认为17.8是弦长尺寸(弧长不便于测量),而检验人员则认为展开图中尺寸应为弧长尺寸,应化成弦长进行检测,从而引起争议。 (2)离合器的承载能力是靠牙齿分布的均匀性来保证的,这种均匀性必须由角度公差来控制(因为牙 Trapezoidal jaw jaw clutches are widely used in low-speed and high-torque control systems due to their advantages of strong bearing capacity, elimination of circumferential interdental space, simple structure and convenient operation. However, due to the drawings on the clutch tooth size marked inappropriate, often causing controversy or even scrap, the relevant issues are described later 1. Wrong labeling method Figure 1, Figure 2 and Figure 3 shows the following methods exist for the following Some problems: (1) In Figure 1, workers often assume that 17.8 is chord length (arc length is inconvenient to measure), whereas inspectors assume that the size of the unfolding plan should be arc length and should be detected as chord length, causing dispute. (2) The carrying capacity of the clutch is ensured by the uniformity of the tooth distribution, which must be controlled by the angular tolerance