同步带传动是由一根内周表面设有等间距齿形的同步带及与之相应吻合的同步轮所组成。
The synchronous belt drive is composed of a synchronous belt with equal spacing teeth on the inner peripheral surface and corresponding synchronous wheels.
传动特点为：传动比准确，无滑差，传动平稳，噪音小，传动效率高达98%。
Transmission features: accurate transmission ratio, no slip, stable transmission, low noise, transmission efficiency up to 98%.
使用要求：温度-20~80℃，线速度V<50m/s, 功率P<300KW
Operating requirements: temperature - 20 ~ 80 ℃, linear speed V < 50M / s, power P < 300kW
同步带是以钢丝绳或尼龙线为强力层，外覆聚氨酯或氯丁橡胶的环形带，带的内周制成齿状，使其与齿形带轮啮合。
The synchronous belt is an annular belt with steel wire rope or nylon wire as the strong layer and covered with polyurethane or neoprene. The inner circumference of the belt is made into teeth to mesh with the toothed pulley.
同步带应用时主要参数是节距与节线，相邻两齿线的直线距离称为节矩，用Pb表示。
When the synchronous belt is applied, the main parameters are pitch and pitch line. The linear distance between the center lines of two adjacent teeth is called pitch moment, which is expressed in Pb.
同步带垂直其底边弯曲时，在带中保持原长度不变的周线称为节线，用Lp表示。
When the synchronous belt is bent perpendicular to its bottom edge, the circumference that keeps the original length unchanged in the belt is called the pitch line, which is represented by LP.
同步带的分类：根据同步带齿形的不同分为梯形齿和弧形齿。弧形齿又分成圆弧齿，平顶圆弧齿和凹顶抛物线齿。
Classification of synchronous belt: according to different tooth shapes of synchronous belt, it is divided into trapezoidal teeth and arc teeth. Arc tooth is divided into arc tooth, flat top arc tooth and concave top parabola tooth.

同步轮材质：同步带轮一般由钢、铝合金、黄铜、尼龙、塑胶等材料制造，根据材质和用途的不同采用发黑、镀锌、阳极氧化、高频淬火等表面处理。（实际运行工况一般做动力传动，需要轻量化设计与减轻负载的转动惯量常选择铝合金材料+阳极氧化处理）
Synchronous pulley material: the synchronous pulley is generally made of steel, aluminum alloy, brass, nylon, plastic and other materials. According to different materials and uses, it adopts blackening, galvanizing, anodizing, high-frequency quenching and other surface treatments. (power transmission is generally used under actual operating conditions, which requires lightweight design and reducing the moment of inertia of load. Aluminum alloy material + anodizing treatment is often selected)
同步轮内孔连接方式：同步轮内孔分：圆孔（免键衬套型）、圆孔+螺纹孔、键槽孔+螺纹孔、加持型孔。
Connection mode of synchronous wheel inner hole: synchronous wheel inner hole is divided into: round hole (keyless bushing type), round hole + threaded hole, key slot hole + threaded hole and holding hole.
圆孔：与免键衬套配合使用，因为无键槽而不会降低轴的强度，并且易于定位，同心度容易保证。（实际运用中常用在丝杆固定端做动力输入或运用在对宽度需要调节的输送带上面方便调整输送带的宽度调整）
Round hole: used with keyless bushing, because there is no keyway, it will not reduce the strength of the shaft, and it is easy to locate and ensure the concentricity. (in practical application, it is often used as power input at the fixed end of the screw rod or on the conveyor belt whose width needs to be adjusted to facilitate the width adjustment of the conveyor belt)
圆孔+螺纹孔：通过圆孔进行定位，螺钉固定和传动扭矩，适用于轻负载。（实际工况很少使用这样情况，一般对力要求不高，轴径比较小时才做考虑，且轴上铣偏位）
Round hole + threaded hole: positioning through round hole, screw fixation and transmission torque, suitable for light load. (it is rarely used in actual working conditions. Generally, the force requirements are not high, the shaft diameter ratio is small, and the milling deviation on the shaft)
键槽型+螺纹孔型：由键槽来传递更大的扭矩，适用于中重负载。（选此方式）
Keyway + threaded hole: the keyway transmits greater torque, which is suitable for medium and heavy loads. (most preferred)
夹持型：通过螺栓连接，容易轴向定位。（一般不选用此方式）
Clamping type: through bolt connection, it is easy to locate axially. (this method is generally not used)
同步轮同步带的安装要求：安装时需要注意带轮轴线的平行度，各带轮的传动平面位于同一平面内，防止因为带轮偏斜而使带侧面压紧在挡圈上，造成带侧面磨损。带的张紧通过调节距或加张紧轮来实现。
Installation requirements for synchronous pulley and synchronous belt: pay attention to the parallelism of pulley axis during installation. The transmission center plane of each pulley is located in the same plane to prevent the belt side from being pressed on the retaining ring due to pulley deflection, resulting in belt side wear. The belt is tensioned by adjusting the center distance or adding tensioning wheels.