Common methods of mechanical locking
1. Thread locking is the most commonly used, and its products have been standardized. Recommended for general use. When using thread locking, pay attention to the matching thread length. Generally speaking, if there are more than eight teeth, the extra matching length is of little significance, and if there are less than three teeth, the connection will be unreliable. One of the biggest advantages of thread locking is that the stroke is long, the entire stroke can be used as an effective action point, and the force is increased uniformly everywhere. The disadvantage is that it is more troublesome to operate when the working stroke is longer. It can be used under normal circumstances, but it should not be used alone when quick change is required.
2. The eccentric locking mechanism can lock quickly, but its locking action point is relatively fixed and the stroke is small, which requires certain accuracy of the parts. For plastic parts, they are prone to creep and affect the locking effect. For situations where the locking point often changes in a small range, the eccentric may be used in conjunction with thread locking.
3. Inclined locking has a small increase in force and a small stroke, but the stroke has a certain adjustment ability and is generally used in the form of a tilt wedge. In actual design, the elasticity of plastic is often used when the locking force is small. In addition, it is also often used to adjust the gap between parts. Generally not used for larger locking force.
4. The locking stroke of the four-bar mechanism can be designed to be large, and the locking point is relatively fixed. For mechanisms with higher precision, it can be used alone. Except that the stroke can be designed larger, other situations are similar to the eccentric wheel. Generally used in conjunction with thread locking. Its structure is relatively complex and is used in frequently used quick-change mechanisms.