Where to Place the Jack?
1 Answers
When changing a tire, the jack should be placed under the chassis, near the wheel, on the raised position. The operation of the jack should not be rushed; it should rise rhythmically and uniformly, and descend slowly. When using multiple jacks simultaneously, operate them synchronously. After using the jack, conduct a thorough inspection to check the hydraulic pressure and potential hazards, perform maintenance, and store it in an appropriate place. Jacks can be categorized by structural features into three types: rack jacks, screw jacks, and hydraulic jacks. Below are detailed introductions: 1. Screw Jack: The screw jack's threads do not have a self-locking function and are equipped with a brake. Releasing the brake allows the load to descend quickly, reducing return time, but this type of jack is more complex in construction. Screw jacks can support heavy loads for extended periods, with a maximum lifting capacity of up to 100t, making them widely applicable. When fitted with a horizontal screw at the bottom, they can also enable small-distance horizontal movement of the load. 2. Hydraulic Jack: Used in hydraulic transmission systems as an intermediate medium, it plays a role in transmitting and converting energy. Additionally, it serves functions such as lubrication, corrosion prevention, cooling, and flushing of components within the hydraulic system. 3. Electric Jack: The electric jack is equipped with a pressure-retaining device to prevent overpressure. If overpressure occurs, the jack may not return to a certain position. Its special structure provides dual protection for the jack. When fitted with a diving device, it can achieve high travel with low height.