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The introduction of castor

Author:   Time:2015/5/13 10:18:47

The history of the castor

To trace the history of the castor is also a very difficult thing, but after people invented the wheel, moving and moving object is a lot easier, but can only be run on a straight line, wheel for moving heavy objects to the direction of the change is still very difficult, then people invented with a steering wheel structure, that is what we now call the castor or universal wheel. Castor appeared to people carrying especially moving object has brought the era of the revolution, not only can easily carry, can also with any direction, greatly improving the efficiency.

Recently with the rise of the industrial revolution, the more and more equipment need to move, castor is applied more and more widely in the whole world, all walks of life almost inseparable from the caster. In the modern along with the continuous development of science and technology, the equipment is becoming more and more multifunctional and high utilization rate, caster has become an indispensable part. The development of the castor is more specialized and became a special industry.

The application of the castor

Castor has a very wide range of application, the design of almost any industry. According to the needs of different industries, people constantly invented all kinds of casters, all over the world, there are about 150000 different species of casters used in various industries.

The structure of the caster wheel made from a single wheel is installed on the bracket, used to install below the equipment makes it free to move. Castor is divided into two main categories:

A caster wheel fixed bracket with the single wheel, only move along A straight line.

B activity castor turning of 360 degrees with single wheel, can run freely in any direction.

Single wheel industrial casters are varied in size, type, such as tyre tread each are not identical. Choose the right wheels to take on the following conditions:

A bearing capacity.

B using field environment

C all kinds of special climate, such as moisture, heat or cold.

D work environment containing chemicals, blood, grease, oil, salt and other substances.

E driving shock, collision and quiet.

How to choose a suitable for your use of castor

(the following introduce main consideration)

A, how to select the appropriate wheel

1, choose the wheel material: first consider using the road, the size of the obstacle, the use of ground residual material (e.g., iron filings, grease), environment conditions, such as high temperature and normal temperature or low temperature) and the wheels can carry the weight of the different conditions, such as to choose suitable wheel material. For example: rubber wheel can’t acid, oil and chemicals, super polyurethane wheel, high-strength polyurethane wheel, nylon wheel, steel and high temperature resistant chakras can apply to different special environment.

2, calculating weight capacity: in order to be able to calculate the load capacity of various casters need must know the weight of transport equipment and maximum load and the number of single wheel and castor. A single wheel load capacities as needed or castor calculation is as follows:

T = (E + Z)/M (N:

- T = single wheel or castor to loading weight;

- E = weight of transportation equipment;

- Z = maximum load;

- M = the number of single wheel and castor used;

- N = safety coefficient (1.3 1.5).

3, determine the wheel diameter size: usually wheel diameter the more the more easy to drive, the greater the load capacity and at the same time, it is to protect the surface from being damaged, wheel diameter size first consideration should be given the choice of bearing and the weight of the load on the truck starting thrust to decide.

4, wheel material soft hard choices: usually have nylon wheel, wheel super polyurethane wheel, high-strength polyurethane wheel, high strength synthetic iron, iron, cheer. Super polyurethane wheel, high-strength polyurethane wheel in both indoor and outdoor floor, can meet the requirements of your handling; High strength synthetic lugs can apply to hotels, medical apparatus and instruments, floors, wooden floor, ceramic tile ground for low noise quiet on the ground when walking driving; Nylon wheel, wheel which can be applied to uneven or there are materials such as scrap iron on the ground; While pep talk round applies to soft light load and road surface is not flat.

5, rotational flexibility: single wheel rotation, the more the greater the effort, roller bearings can carry heavier load, rotational resistance is larger: single wheel installed on the quality of bearing steel ball bearing, can carry heavier load, turn the lighter, flexible peace.

6, the condition of temperature, cold and high temperature occasion has much effect on the caster wheel, polyurethane wheel under 45 ℃ low temperature below zero, rotating flexible, high temperature resistant light wheel under the high temperature of 275 ℃.

Second, how to select the appropriate wheel rack

1, choose suitable wheel rack first consider the weight of the caster wheel bearing such as supermarkets, schools, hospitals, office buildings, hotels and other places, because the floor is good, the smooth handling of the goods is lighter, (each trundle bearing in 10-140 - kg), suitable for selection (2-4 mm) with a thin plate stamping plating wheel frame, the wheel frame is light, flexible operation, quiet and beautiful, the plating wheel frame in accordance with the ball bearing arrangement is divided into double row bead and single bead. If often move or application of double row in the bead.

2, in the place such as factories and warehouses, cargo handling is very frequent and heavy load (caster wheel bearing only at 280-420 kg) each chooses to fit (5-6 mm) thick steel plate stamping hot forging and welding of double row ball wheel.

3, if used for carrying heavy objects such as textile, automobile factories, factory machinery factory and other places, because the charge big factories within walking distance (caster wheel bearing only at 350-1200 kg) each, therefore, should choose (8-12 mm) with a thick plate after cutting wheel frame, welding activities wheel rack flat ball bearing and ball bearing on the floor, make the castor can withstand the heavy loading, flexible rotation, impact resistance, etc.

Third, choose the suitable bearing

1, the spirit, bearing, spirit is a special engineering plastics, suitable for humid and corrosive, rotational flexibility, resistance is bigger.

2, roller bearing: after heat treatment of roller bearings can carry heavier load, rotational flexibility.

3, ball bearing, selects the high quality bearing steel ball bearing is made and be become, can carry heavier loads, suitable for flexible rotation and peace required.

4, plane bearing: suitable for high and very high load and high speed.