Mechanical jack principle, jack operation

Description :

　　Mechanical jacks, also known as screw jacks, can be used upside down and are suitable for railway vehicle maintenance, bridge installation, mining, construction support, as well as lifting heavy objects such as vehicles and equipment. They have the advantages of simple structure, convenient use, safety and reliability, and are a widely used lifting tool. Mechanical jack structure 1. Top cover 2. Square head flat key 3. Joystick 4. Small gear 5. Small bevel gear 6. Screw 7. Lifting sleeve 8. Copper nut 9. Large bevel gear 10. Round head flat key 11. Thrust bearing 12. Shell 13. Base mechanical jack usage method

　　1. Before use, it is necessary to check whether the jack is normal, whether each component is flexible, add lubricating oil, and correctly estimate the weight of the heavy object. Choose a jack of appropriate tonnage and avoid overloading.

　　2. Adjust the support teeth on the joystick by first manually rotating the joystick in a clockwise direction to quickly raise the lifting sleeve to the top weight.

　　3. Insert the handle into the joystick hole, move the handle up and down back and forth, and the weight will rise accordingly. When a red warning line appears on the lifting sleeve, the handle should be stopped immediately. If the support teeth need to be adjusted in the opposite direction when descending, the heavy object will start to descend.

　　Precautions for mechanical jacks

　　1. Regularly keep the surface of the machine clean, check the internal structure regularly to ensure that the small gear inside the joystick is flexible and reliable, and the lifting sleeve can be raised and lowered freely.

　　2. The friction surface between the lifting sleeve and the housing must be lubricated with oil at all times, and other oil injection holes should be regularly lubricated with oil.

　　3. In order to ensure safety during use, overloading and working with illness should be avoided. It is not advisable to use multiple units to avoid danger.

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