When it comes to lifting tools, the “Lever Block Hoist” and “Chain Block Hoist” are two common choices. They differ significantly in terms of their construction, operation, application scenarios, and load capacity, and are described and compared below.
Chapter 1: Principle and mode of operation
1.1 Lever Block Hoist: The process of lifting and lowering is achieved by manually operating a lever. The user needs to pull the lever repeatedly to lift or lower the load, similar to a mechanical lever system.
1.2 Chain Block Hoist: The process of lifting and lowering is achieved by pulling a chain. The user needs to pull the chain handle and transfer the force through the chain to lift or lower the heavy object.
Chapter 2: Structure and Appearance
2.1 Lever Block Hoist: Usually has a short lever, a handle, a lifting chain, and a hook. They have a compact appearance and are suitable for use in small spaces.
2.2 Chain Block Hoist: Usually consists of a handle, a chain, a hook, and a chain drive mechanism. They have a longer appearance and are suitable for larger work areas.
Chapter 3: Uses and Scenarios
3.1 Lever Block Hoist: Often used in scenarios where more precise control is required, as the operator can achieve fine lifting and lowering with the appropriate lever action. Suitable for small or positioning jobs.
3.2 Chain Block Hoist: Commonly used in scenarios where greater load capacity and constant use are required, as the chain can transmit greater force. Suitable for some larger or heavier objects.
Chapter 4: Load Capacity
4.1 Lever Block Hoist: Load capacity is usually low and suitable for light to medium-weight lifting tasks.
4.2 Chain Block Hoist: Load capacity is usually higher and suitable for medium to heavy lifting tasks.
Chapter 5 : Price and maintenance
5.1 Lever Block Hoist: Due to their relatively simple construction, Lever Block Hoists are generally less expensive and relatively easy to maintain.
5.2 Chain Block Hoist: Slightly more complex construction, usually more expensive and more complicated to maintain.
Chapter 6 : Operating instructions
6.1 Operating the Lever Block Hoist:
PREPARATION: Before use, make sure that the working parts of the hoist are not damaged and that the chain is not kinked or rusted. Suspend the hoist’s hook from the object to be lifted.
ADJUSTMENT POSITION: If fine control is required, adjust the position of the lever to obtain the desired lifting height. Place the lever in a position that suits you so that the proper force can be applied during operation.
OPERATING THE LEVER: Pull the lever down (some force may be required) to lift the heavy object. Conversely, push the lever up to lower the weight. Keep operating the lever until the weight reaches the desired height or position.
SAFETY LOCK: When the desired height has been reached, be sure to lock the safety locking device on the hoist to prevent accidental lowering.
LOWERING THE WEIGHT: To lower the weight, gently release the safety lock and slowly push the lever up to allow the weight to descend slowly. Use careful control during this process so that the object is not lowered too quickly or uncontrollably.
6.2 Operating the Chain Block Hoist:
CHECK CHAIN: Before use, check the condition of the chain to ensure that it is not damaged, kinked, or rusted. Hang the hook on the object to be lifted.
OPERATE CHAIN HANDLE: Pull the chain handle to start the chain drive and lift the object. Pull the handle appropriately for the desired height and speed. For heavier objects, more force may be required.
SAFETY LOCK: Once the weight has reached the desired height, ensure that the safety locking device on the chain hoist is locked to prevent accidental lowering.
LOWERING: To lower a heavy object, gently release the safety lock and then slowly pull the chain handle to allow the chain to slowly drive and lower the object. As with lever hoists, use careful control when lowering heavy loads.
MAINTAIN STABILITY: Ensure that you maintain the stability of the weight throughout the lifting and lowering process to prevent the weight from swaying or tilting.
Chapter 7: Safety Precautions
When operating any lifting tool, always follow the instruction manual and operating instructions provided by the manufacturer. Make sure the surrounding area is safe and avoid others standing underneath the lifting tool. Use appropriate personal protective equipment such as gloves and goggles. Do not exceed the rated load capacity of the hoist to prevent accidents. Remain focused and careful during the operation and avoid sudden movements. Regularly check the condition of lifting tools to ensure they are in good working order.
All in all, choosing the right lifting tool depends on the specific job requirements and environment. Understanding the features and benefits of lever hand hoists and chain hoists will help make an informed choice for different lifting tasks. Whichever tool you choose, safe operation is always one of the most important considerations.