限位开关YT-850，限位开关盒广泛用于各类机床和起重机械，用以控制其行程、进行终端限位保护。在电梯的控制电路中，还利用行程开关来控制开关轿门的速度、自动开关门的限位，轿厢的上、下限位保护。

　　限位开关的应用方面很多，很多电器里面都有它的身影。那这么简单的开关能起什么作用呢?它主要是起连锁保护的作用。最常见的例子莫过于其在洗衣机和录音机(录像机)中的应用了。

　　在洗衣机的脱水(甩干)过程中转速很高，如果此时有人由于疏忽打开洗衣机的门或盖后，再把手伸进去，很容易对人造成伤害，为了避免这种事故的发生，在洗衣机的门或盖上装了个电接点，一旦有人开启洗衣机的门或盖时，就自动把电机断电，甚至还要靠机械办法联动，使门或盖一打开就立刻"刹车"，强迫转动着的部件停下来，免得伤害人身。

　　在录音机和录像机中，我们常常使用到快进或者倒带，磁带急速地转动，但是当到达磁带的端点时会自动停下来。在这里行程开关又一次发挥了作用，不过这一次不是靠碰撞而是靠磁带的张力的突然增大引起限位开关主要用于将机械位移转变成电信号，使电动机的运行状态得以改变，从而控制机械动作或用作程序控制。

　　限位开关YT-850真正的用武之地是在工业上，在那里它与其它设备配合，组成更复杂的自动化设备。

　　机床上有很多这样的限位开关YT-850，用它控制工件运动或自动进刀的行程，避免发生碰撞事故。有时利用限位开关使被控物体在规定的两个位置之间自动换向，从而得到不断的往复运动。比如自动运料的小车到达终点碰着限位开关，接通了翻车机构，就把车里的物料翻倒出来，并且退回到起点。到达起点之后又碰着起点的行程开关，把装料机构的电路接通，开始自动装车。总是这样下去，就成了一套自动生产线，用不着人管，日以继夜地工作，节省了人的体力劳动。

　　是一种常用的小电流主令电器。利用生产机械运动部件的碰撞使其触头动作来实现接通或分断控制电路，达到一定的控制目的。通常，这类开关被用来限制机械运动的位置或行程，使运动机械按一定位置或行程自动停止、反向运动、变速运动或自动往返运动等。

　　产品详细信息

　　限位开关YT-850，限位开关盒就是用以限定机械设备的运动极限位置的电气开关。限位开关有接触式的和非接触式的。接触式的比较直观，机械设备的运动部件上，安装上行程开关，与其相对运动的固定点上安装极限位置的挡块，或者是相反安装位置。当行程开关的机械触头碰上挡块时，切断了(或改变了)控制电路，机械就停止运行或改变运行。由于机械的惯性运动，这种行程开关有一定的"超行程"以保护开关不受损坏。非接触式的形式很多，常见的有干簧管、光电式、感应式等，这几种形式在电梯中都能够见到。当然还有更多的先进形式。

　　限位开关YT-850，限位开关盒是限制工作机械位置的主令电器。一般于工作机械到达终点时发生作用。故又称终端开关。行程开关要控制的是工作机械的行程，而限位开关要控制的则是工作机械的位置，且往往是终端位置或极限位置。

　　The limit switch is widely used in all kinds of machine tools and lifting machinery to control the travel and the terminal limit protection. In the control circuit of the elevator, it also USES the travel switch to control the speed of the switch door, the limit of automatic opening and closing, the upper and lower limit protection of the cage.

　　The application of limit switch is many, many electric appliances have it in the figure. So what does a simple switch do? It mainly ACTS as a chain protection. The most common example is its use in washing machines and recorders.

　　In the process of washing machine dehydration (dry) speed is very high, if someone at this time due to failure to open the door of the washing machine or cover, after hand in again, it is easy to cause harm to people, in order to avoid this kind of accident, at the door of the washing machine or cover with the electric contact, once someone open the door of the washing machine or cover, automatically put the motor power, and even on mechanical linkage, open a door or cover immediately "brake", force rotating parts to stop, lest hurt person.

　　In tape recorders and video recorders, we often use fast-forward or reverse tape, and the tape spins rapidly, but stops automatically when it reaches the end of the tape. Travel switch here once again played a role, but this time is not by the collision, but caused by tape tension suddenly increase limit switch is mainly used for the mechanical transfer into electrical signal, to change the running state of the motor, so as to control the mechanical action or used for process control.

　　The real use of the limit switch YT-850 is in industry, where it works with other equipment to form more complex automation equipment.

　　The machine tool has many such limit switches YT-850, use it to control the movement of the workpiece or automatic feed to avoid the collision accident. Sometimes the limit switch is used to automatically reverse the controlled object between the two positions, thus obtaining continuous reciprocating motion. For example, the car of the automatic transport reaches the end of the terminal and touches the limit switch. When the car is turned on, the material in the car can be overturned and returned to the starting point. After reaching the starting point, the switch of the starting point is touched, the circuit of the loading mechanism is connected, and the automatic loading is started. Always this way, it became a set of automatic production line, no one to manage, day and night work, saving people's manual labor.

　　Limit switch YT-850, the limit switch box is a commonly used small current main generator. Using the collision of the moving parts of the production machinery to make the contact or breaking control circuit to achieve certain control purposes. Normally, such switches are used to limit the position or travel of the mechanical movement, so that the motion machine can stop automatically, reverse motion, variable speed or automatic round-trip motion in a certain position or stroke.

　　Product details

　　The limit switch, YT-850, is the electrical switch used to limit the movement limit position of the mechanical equipment. The limit switch has contact type and non-contact type. The contact type is more intuitive, the moving parts of the mechanical equipment are mounted, the travel switch is installed, and the block of the limit position is installed on the fixed point of relative motion, or the installation position is opposite. When the mechanical contact of the travel switch meets the block, the control circuit is cut off (or changed), and the machine stops running or changes the operation. Due to the mechanical inertia movement, the travel switch has a certain "overstroke" to protect the switch from damage. There are many forms of contactless, such as dry reed tube, photoelectric type and induction type, which can be seen in the elevator. There are more advanced forms, of course.

　　The limit switch, YT-850, is the main generator that restricts the position of the working machine. Usually occurs at the end of the work machine. It is also known as terminal switch. The stroke switch should control the stroke of the work machine, while the limit switch should control the position of the working machine, and it is usually the terminal position or the limit position.