Description

Limit switch Chinese wheel ruler

* Economical plastic housing, light weight
* Prevent oil and water
* Double way switch, double spring internal switch
* A variety of levers
* Widely used in mechanical equipment, automatic machine, instrument, electric movement tool etc.

What are the end switches and what are they used for?

They may be called end-of-stroke switches, and they are also called electromechanical limit switches.

This switch performs a function like the manual push button switch, but the only difference is that the pressure is done mechanically instead of manually.

There are many types of mechanical means to operate these switches, including cams, levers, pulleys, and cylindrical pistons, and the symbols used do not specify the type of operator used.

It contains a number of open and closed contact points, and the position of these points changes when something collides with them. They can be observed frequently in cranes, elevators, and on transmission belts.

Use the mechanical end-of-stroke switch on moving belts

Technical specifications of the product:

• Limit switch Chinese wheel ruler
• Type: Chinese
• Industrial use/application
• Switch type rotary limit switch, lever limit switch
• Current rating 10 amps
• Protection degree IP65
• Oil-resistant, water-resistant and dust-resistant structure, rated
• Maximum AC voltage 500V
• Ambient operating temperature (-10) – (+80)
• Mechanical operating cycle: 15,000,000 cycles
• Minimum operating temperature -10°C
• Maximum operating temperature +80°C
• Long life

1. Actuator

It is considered part of the key, and through it the sensation is transmitted to the rest of the key parts. There are many forms of it, including three types:

• Side Rotary.
• Side or Top Push compressor.
• Wobble Stick or Cat Whisker.

The Actuator has two modes:

• Reset Point is the non-operating position which is not affected by any force or torque.
• Trip Point operating mode: When the operator is affected by force or torque, it moves from the Reset position to the Trip position.

Solid Rotary type

It is a prominent column installed next to the head of the Limit Switch, and when it moves, the connection points work, and this type can move in one or two directions – Uni-direction_Bi-direction.

An arm called the Lever Arm is attached to the column, and there are many shapes of this arm, as shown in the figure.

Top Push Side type

It is a short button installed on the head of the key, and when pressed, the key works.

It often has a spring so that it can return to its normal position when the pressure on it is removed. There are a few types that do not have this spring. In this case, this button is pressed in the opposite direction until it returns to its normal position. There are many shapes as shown. In the form.

Wobble Stick or Cat Whisker

It is a long, thin arm mounted on top of the limit switch, and when it is moved in any direction, the switch works. This arm is made of flexible wire wrapped in a specific way, giving it great flexibility and ease of moving it in any direction, and it returns to its normal position when the force is removed.

The shape of the movement arm, its extent of shock tolerance, and its mechanical design must be determined to suit the nature of the mechanical part that will collide with it.

2. Head

The head is the part containing the mechanical parts responsible for transferring movement from the actuator actuator to the contact points. When the actuator moves, the mechanical part presses on the contact points and changes their state (Close or Open).

3. Contact Block points box

It contains a group of connection points, which can be two pairs of connection points or four pairs, and their position is Normal Close or Normal Open. The number of contact points we will need must be determined.

4. Terminal Block

It contains screws through which electrical wires are connected to connection points.

5. Switch Body

It contains a points box and connection terminals.

The operating environment, that is, the place where the switch will be installed, in terms of humidity, dust, temperature, and vibration, so that we can determine the appropriate shape and external structure of the switch.

Is it made of metal or plastic?

In the chemical and fertilizer industries, a plastic structure is preferred if the temperature is not high.

It must be determined how to install it and place it in the appropriate place