| 摘要 |
The invention provides a spring arm device, comprising: a parallelogram linkage mechanism composed of a mobile side, a fixed side in parallel with the above-mentioned mobile side, an upper arm and a load arm respectively connected with the mobile side and the fixed side; a spring, one end of which is connected with the fixed side or the upper arm while the other end is connected with the mobile side or the load arm or the hinge joint between the mobile side and the fixed side; a pull rod used for installing the above-mentioned spring; a copular axle used for positioning the above-mentioned pull rod and a retainer used for installing the above mentioned copular axle; wherein, the above-mentioned retainer is positioned on the mobile side, or on the load arm or on the hinge joint between the mobile side and the load arm. Through a design to the copular axle and the retainer, the device ensures that the copular axle dynamically changes its position during rolling motion, and finishes geometric compensation for the spring's tensile force, thus realizing isoelasticity property. The device has the advantages of simplifying structure, reducing production cost, improving reliability and simplifying operation. |
