Medical apparatus and instruments of castor accessories function and selection method
Medical apparatus and instruments of castor accessories and selection method of medical apparatus and instruments castor accessories: commonly used medical instrument castor parts mainly include racks, sealing ring, winding shields, single wheel brake, the brake, steering lock, etc. Their roles are as follows: a, racks, mainly vehicles at the bottom of the device, can be fixed in a certain position. Others include steering arm, leverage, rubber fenders, lock washer and other special applications of spare parts. Two, sealing ring, prevent to bearing or single wheel bearing dust and maintain its lubricity, easy to rotate. Three, the winding cover: prevent and other debris winding between shaft and the bracket and the clearance between the wheel. Let the wheel to rotate. 4. Single wheel brake: installed on the wheel bushing or tire surface with the hand or foot brake of the operation. Five, the brake switch: can lock and can be fixed wheel braking device. Six, steering lock: lock spring latch on to bearing ( Four or two locks) Medical apparatus and instruments castor activity to lock into the fixed medical casters. Medical apparatus and instruments castor selection method: 1. The larger the size selection: caster diameter, the effort. Obstacle, the more the better. Because of the caster wheel in the late 19th century in the first place in the western industrialized, so castor usually expressed in inches. For example, most of the Chinese supermarket shopping cart use 5 inches. 4 inches castor. At present, the market popular castor size ranging from 1 inch to 10 inches. The size of the commonly used 2 inch, 2. 5 inch and 3 inch, 3. 5 inches, 4 inches, 5 inches and 6 inches, 8 inches and 10 inches, etc. Need to promote, such as supermarket shopping cart, logistics trolley, van, 4 to 6 inches of castor is preferred. However, if the diameter of the continuous casting machine is too big, the equipment's centre of gravity will rise, cost increases, so should be considered. If the device does not need to always push, such as furniture, refrigerator, etc. , only need to move in health, you can use the 3 inches below the casters. 2. See load: the same diameter of casters, general chamber of commerce in the production of several different bearing series, such as light, medium, medium etc. , the method is to make the wheels and stents with different thickness or material. When calculating the load of a single caster, should be given a certain amount of insurance. Local surface is relatively flat, a single caster wheel load = ( Equipment installed in the total number of castor) ×1. 2 ( Insurance coefficient) ; If the surface is rough, the algorithm is a single caster wheel load = total weight 3 equipment, because no matter if not flat on the ground, there are at least three wheels at the same time support equipment. The algorithm is equivalent to increase the coefficient of insurance, more reliable, prevent underload, thus greatly reducing the casting machine life or accident. 。 In foreign companies, the weight generally expressed in pounds for the unit, and most of domestic use kg, the conversion relations as: 2. 2 pounds = 1 kg.