MKD112C-024-GG0-AN 力士乐伺服电机 售后服务

　　大多数设备设计人员对以混合式步进电机为基础的直线电机十分熟悉。该产品已有多年历史，与其它设备一样有其自身的长处和局限性。设计简便、紧凑、无电刷（因此无火花）、惊人的机械优点、设计的实用性以及可靠性是它与生俱来的优点，然而在某些情况下，此直线电机不能用于某些设备，因为在没有日常维护的条件下它是不能保证其耐久性的。

　　不过，目前有几种方法可以克服这样的障碍，使直线电机具有更高的耐久性且不用维护，由于步进电机的无电刷设计，产生磨损的部件是转子轴承以及由导螺杆/螺母组成的螺纹接合。滚珠轴承近年来的改进已经提供了适应直线运动的长寿命产品。最近导螺杆和螺母组合的寿命和耐用性也都有了改进。

　　提高耐久性

　　首先有必要了解电机的基本结构。一个较好的研究实例Size 17电机，它属于混全式步进电机家庭中尺寸较小的。习惯上，直线电机使用由一轴承级金属材料（如青铜）加工成的空心轴，该空心轴具有内螺纹然后与螺纹导杆连接。空心轴沿转子轴线安装。导杆材料通常为不锈钢，它具有相当的防腐蚀性能。大多数零件所用的螺纹的型式是加工螺纹（如#10-32），此螺纹有单头或多头，这取决于电机所需的精度和速度。

　　加工螺纹一般选择 “V”形螺纹，这是由于其易加工并可轧制成形。尽管这对加工来说是较为适用，但对动力的传输而言却是不利。相比之下Acme螺纹更为合适，主要理由如下：

　　Acme螺纹的设计更加高效。而从使用角度来看，低损耗（包括磨擦），就意味着磨损少和使用寿命长。从螺纹的基本几何原理看就很容易理解其中的原因。“V”形螺纹的相对面之间的角度为60度，而Acme螺纹的仅为29度。

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　　⑩Bosch Rexroth(博世力士乐)：Indramat，I/O模块,PLC控制器,驱动模块等。

　　◆Motorola(摩托)：MVME 162、MVME 167、MVME1772、MVME177等系列。

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　　Most equipment designers are familiar with the linear motor based on hybrid stepping motor. The product has a history of many years and has its own advantages and limitations like other devices. Its inherent advantages are simple and compact design, no brush (so no spark), amazing mechanical advantages, practicability and reliability of design. However, in some cases, this linear motor can not be used in some equipment, because it can not guarantee its durability without daily maintenance.

　　However, there are several ways to overcome such obstacles and make the linear motor have higher durability without maintenance. Due to the brushless design of the stepping motor, the only component causing wear is the rotor bearing and the threaded joint composed of guide screw / nut. The improvement of ball bearings in recent years has provided long-life products suitable for linear motion. Recently, the life and durability of the guide screw and nut combination have also been improved.

　　Improve durability

　　First of all, it is necessary to understand the basic structure of the motor. A better research example is size 17 motor, which belongs to the smaller size in the family of hybrid stepping motors. Traditionally, linear motors use hollow shafts made of primary bearing grade metal materials (such as bronze), which have internal threads and are then connected to threaded guides. The hollow shaft is installed along the rotor axis. The guide rod is usually made of stainless steel, which has considerable corrosion resistance. The type of thread used in most parts is machining thread (such as #10-32), which has single head or multiple heads, depending on the accuracy and speed required by the motor.

　　"V" shaped thread is generally selected for processing thread because it is easy to process and can be rolled. Although this is more suitable for processing, it is unfavorable for power transmission. In contrast, acme thread is more suitable for the following reasons:

　　Acme thread design is more efficient. From the perspective of use, low loss (including friction) means less wear and long service life. From the basic geometric principle of thread, it is easy to understand the reason. The angle between the opposite faces of the "V" thread is 60 degrees, while that of the acme thread is only 29 degrees.