Tag Archives: chain hoist

How A Manual Chain Hoist Works?

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From What Parts A Manual Chain Hoist Consists

Manual chain hoist is a pretty simple device considering the large amount of weight such a tool can lift. Chain hoists are made from durable, high grade steel to ensure safety and reliability when lifting couple of tons heavy loads. Manual chain hoist can be separated in three different part categories: lifting chains, lifting mechanism and hooks.

 

Chain hoist has got two chain loops – hand chain and lifting chain. Hand chain sits on a wheel located in the lifting mechanism; it needs to be pulled by hand in order to lift a load. The wheel inside the lifting mechanism has got special pockets that allow the hand chain to move the wheel. Lifting chain also loops the lifting mechanism and lifts or lowers a load. At the end of the chain there is a grab hook, where you can attach lifting chains or slings, a load leveler or load itself. There is also a hook on the top of the chain hoists housing. This hook is used to attach the hoist to a ceiling mount, trolley system or other construction that can withstand the weight a hoist will lift. Most chain hoists have swivel hooks, meaning that they can be turned 360 degrees around to allow for easier mounting. The lifting mechanism consists of a cog, axle, drive shaft, gears and sprockets. There is also a chain stopper or brake on most chain hoists that prevents load from lowering under a load.

 

How A Manual Chain Hoist Works

The physics behind a chain hoist are very simple and have been used for lifting heavy objects for a long time. Chain hoist uses a mechanical advantage to transform small force over a long distance to large force over a short distance; this is possible by using multiple larger and smaller gears in the chain hoist mechanism.

 

To lift a load, chain hoist operator needs to pull down the hand chain; this turns the cog and axle which goes through the lifting mechanism. Inside the lifting mechanism are multiple gears which increase the mechanical work applied when pulling the hand chain for dozen times using gear ratio, allowing to easily lift loads with multiple ton capacity.

 

So when the hand chain is pulled, the cog which is rotated by the hand chain turns the drive shaft and gears which turn the load chain sprocket, this also rotates the load chain that is looped over the load chain sprocket and lifts a load. Larger gears move slower than smaller gears, but create more force; this is why chain hoist lifts load very slowly when compared to a hydraulic hoist. At the end of the lifting chain is a grab hook, which allows easily attaching and detaching a load. Also, most chain hoist lifting mechanisms have a ratchet or braking system that prevents the load from slipping back, but allows lowering a load by pulling the other side of the hand chain.

 

Manual Chain Hoist In Comparison With Other Hoist Types for Engine Lift

Chain hoists have different uses, for example in construction sites, shops, warehouses, also in car service stations and other application, where precise lifting is required.

 

The Disadvantages Of Manual Chain Hoists For Engine Lifting Are:

 

  • They are slower than other type of hoists;
  • They have special requirements for installation areas, which limit places these hoists can be used, in opposite hydraulic hoists just need a solid and level ground.

 

However, There Are Also Some Advantages For Using Manual Chain Hoists For Engine Lifting:

 

  • They don’t need electricity, oil or other additional resources to work;
  • They are cheaper than electric or hydraulic hoists;
  • They are simple to use and easy to repair and maintain.

 

If you need more information about manual chain hoists, try to visit Cheng Day Machinery Works Co., Ltd. – the company specializes in producing wire rope hoist, electric chain hoist, crane components, chain hoist trolley, etc. Get more details please send inquiry or contact with Cheng Day Machinery.

 

 

Article Source: http://www.knockoutengine.com/how-a-manual-chain-hoist-works/

Electric Chain Hoists – Choose The Right One For Your Industry

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Electric chain hoists are used in industry and related areas to lift heavy objects, equipment, or machinery. By using electric chain hoists, the task is done faster and easily with less risk involved. They are much easier and sophisticated to use than manual chain hoists. Moreover, they are more convenient and can achieve the task more efficiently than manual chain-hoists. Electric chain hoists are available in a variety of sizes and for a variety of lifting equipment depending upon the load to be lifted.

 

These days, it is not hard for one to find the hoists that you require for your type of industry. These hoists are now manufactured by reputed manufacturers in Taiwan as well as abroad. Many online dealers also stock reputed brands, so you need to know the exact specifications that you require for lifting the required loads.

 

Nowadays, hoists have a variety of features and come with a range of price tags. Depending upon the type of the hoist you require, it is essential you are away of the safety parameters and whether the hoist will stand up to the rigorous operational requirements. Therefore, you should be knowledgeable about the operations requirements of the hoist you propose you wish to purchase. At the same time, you should be aware of the quality standards that are applicable to electric chain hoists. Do not go for a cheaper hoist if you are in a position to purchase a more expensive one. A cheap hoist may leave out the safety and quality parameters essential under various rules, laws, and regulations.

 

A manual chain can lift up a lighter load, but an electric chain hoist can be used to lift heavier loads. Nevertheless, they should not be used for lifting loads beyond their lifting capacity. Therefore, it is always advisable to check the rated capacity of the electric chain hoist before actually buying it. At times, there are circumstances which require continuous operation of the hoist, so be sure that the operators do not exceed the rated capacity. For example, if the rated capacity is 30 minutes on and 30 minutes off, you cannot run the hoist more than this capacity.

 

A torque limiting device on the hoist will prevent accidental or intentional overload. Also check for safety features like upper and lower limit switches and low voltage controls. A stop button can take care of emergency situations. A variety of speed capacities are available so you can make the right choice while purchasing a hoist. There will be a number of manufacturers providing you with the same types or hoists.

 

They are also available in different speed capacities and speeds to be able to endure a variety of handling procedures. Since there are many manufacturers offering various types of hoists, you need to know exactly what you are going to buy. Therefore, while buying an electric chain hoist, do not buy the ones that seem cheap or spurious for you, or do not even buy the ones that violate safety norms. Train your staff adequately on the use of electric chain hoists and always read the operation manual before installation and operation.

 

For quality electric chain hoists for use in various industries, try to visit Cheng Day: www.chengday.com

 

With 44-year experience of electric chain hoist manufacturing in Taiwan, Cheng Day exactly realizes what customers need and offers custom-made design. They consistently improve and upgrades products quality. Moreover, Cheng Day has patents for parts in electric chain hoists; they also create new models every year to extend usage.

 

Cheng Day electric chain hoists are proudly manufactured in Taiwan. More details, please feel free to contact Cheng Day Machinery Works Co., Ltd.

 

 

Article Source: http://EzineArticles.com/5110086