The caster is a general term, including the active casters and the fixed casters. The moving caster is also known as the universal wheel, whose structure allows for 360-degree rotation; Fixed casters are also called directional casters, which have no rotating structure and cannot rotate. Usually two casters are used for matching, such as the wheelbarrow structure is the front and the front two orientations, and the rear side of the handrail is the two universal wheels.
Fixed casters have no rotating structure and cannot rotate. Usually, two casters are used for matching, such as the structure of the wheelbarrow, which is the front two fixed wheels, and the rear one is the two universal wheels. Casters are casters of various materials, such as cast-iron wheel, nylon wheel, etc.
It is difficult to trace the history of the caster, but after the wheels have been invented, it is much easier to move and move things, but the wheels can only run on a straight line.It was still very difficult to change direction when carrying a big object, and then people invented it .The steering wheel, which is what we call the caster or the universal wheel. The appearance of casters to people especially moving objects brought the epoch-making revolution, not only easy to carry, but also can move in any direction, greatly improved the efficiency.
In modern times, with the rise of the industrial revolution, more and more devices need to be moved, and the casters are widely used in the world, and the casters are almost inseparable from all walks of life. With the continuous development of science and technology, the equipment has become more and more versatile and highly utilized, and the caster becomes an indispensable part. The development of casters is also more specialized and becomes a special industry.
Whether or not the direction of rotation
It is divided into directional casters and non-directional casters (i.e., wanxiang casters).
Directional casters have no rotating structure and cannot rotate; The gimbal structure allows 360 degrees of rotation.
Super heavy casters, special heavy-duty casters, special-shaped casters and brake casters, cushioning casters, adjustable casters and light casters, medium casters, heavy-duty casters, etc.
Fold the caster material
It is mainly divided into super artificial rubber casters, polyurethane casters, plastic casters, nylon casters, steel casters, high-temperature casters, rubber casters, and s-shaped casters.
Installation height: refers to the vertical distance between the ground and the installation position of the equipment. The height of the caster is the maximum vertical distance between the bottom plate and the wheel.
Center distance: the horizontal distance from the center rivet to the center of the wheel.
Rotational radius: the horizontal distance from the center rivet to the outer edge of the tire. The appropriate spacing makes the caster rotate 360 degrees. The reasonable rotation radius directly affects the service life of the caster.
Driving load: castor moving load bearing capacity is also called dynamic load, dynamic load of the castor is different due to the test in a different way of the factory, the material of the wheel will have different and different, the key is to support the structure and quality can impact and shock resistance.
Impact load: the instantaneous bearing capacity of the caster when the device is subjected to shock or vibration. Static load static load: the weight that the caster can bear in a static state. Static load generally should be 5~6 times of load (dynamic load), and static load should be at least 2 times of impact load.
Steering: hard, narrow wheels are easier to steer than soft, wide wheels. The rotational radius is an important parameter of the rotation of the wheel, the turning radius is too short, and the steering difficulty will be increased. Too large will cause the wheel to shake and shorten the life span.
Driving flexibility: factors affecting driving castor flexibility with stents of the structure and the selection of steel, the size of the wheel, wheel type, bearing, wheel driving the greater flexibility, the better, hard on the smooth ground, narrow wheel than flat soft wheels and effort, but on the uneven ground soft wheels and effort, but on the uneven ground soft wheels can better protect device and shock!
It is widely used in wheelbarrow, mobile scaffolding, workshop truck and so on.
The simplest invention is often the most important, and the caster has it. At the same time developed level of a city often used with castor is related to how much, like Shanghai, Beijing, tianjin, chongqing, wuxi, chengdu, xian, wuhan, guangzhou, foshan, dongguan, shenzhen and other cities of castor utilization rate is very high.
The casters are constructed from a single wheel mounted on a bracket, which is installed under the device to allow it to move freely. There are two main types of casters:
A. Fixed casters are fixed with a single wheel and can only move in a straight line.
B. The supporting bracket with a 360-degree turn is equipped with a single wheel and can travel in any direction at will.
The single wheel of the caster is varied and varies in size, model and tyre. Choose the right wheels for the following conditions:
1. Use the site environment.
2. The carrying capacity of the product.
3. The work environment contains chemicals, blood, grease, oil, salt and other substances.
4. All kinds of special weather, such as humidity, high temperature or cold E to resist impact, collision and quiet requirements.