机械式自动限位的推杆机构：

Mechanical automatically limiting push rod:

我们公司发明了安全的电动推杆，包括申请中的《齿轮与齿条往复运动到终点齿自动限位装置》和《带滑道槽结构的齿轮与齿条往复运动到终点齿自动限位装置》2项发明专利技术，达到直线往复运动的机构在启或闭到达终点后机械式自动限位，解决了直线往复运动机构缺乏安全、容易损坏的缺陷和维修困难的缺点；此发明在工业应用非常广泛，包括各种直线推杆、自动控制等等；特别的安全和可靠。

We invented the safest electric push rod, including two patents under application: the automatic limit device for gear and rack reciprocation motion to end gear and the automatic limit device for gear and rack reciprocation motion to end gear with sliding slot. The mechanical limit will work automatically when straight-line reciprocation motion in start-or-close position comes to the end so that easily broken or difficult repair problems or unsafe problems can be solved. This safe and stable invention is applicable widely to industry including straight push rod, automatic control.

本发明同现有技术相比，具有以下优点：

Technical advantages:

1、本发明构造简单实用，便于维修。

This invention structure is simple, practical and easy to repair;

2、本发明可以在不同位置连接不同的拖动物体，适合任何做直线往复运动的设备中拖动物体的连接。

This invention can be put at different position to connect different pulled objects, and it is suitable for connections of pulling objects in equipment doing any straight-line reciprocation motions.

3、本发明中推杆在启闭过程中到达终点后实现了机械式自动限位，保证驱动电机的有效安全。

The mechanical automatic limit will be motivated after pushing rod arriving at the end during start-or-close processing so as to ensure driving motor safety.