Torsion spring test jig

A torsion spring test jig adapted to assist a torsion spring to show different elastic statuses so as to test the torsion spring under the different elastic statuses, comprising:

• a bottom holder having a base body, the base body defining a first fastening frame, a first modulating fastener being slidably mounted in the first fastening frame, and a second modulating fastener being slidably mounted in the first fastening frame and perpendicularly positioned under the first modulating fastener, the first modulating fastener having a first groove, and the second modulating fastener having a second groove extending perpendicularly to an extension direction of the first groove, each intersection of the first groove and the second groove forming a first locating perforation of which the position can be shifted with the relative movement between the first modulating fastener and the second modulating fastener;
• a sliding element having a base board defining a second fastening frame, a third modulating fastener being slidably mounted in the second fastening frame, and a fourth modulating fastener being slidably mounted in the second fastening frame and perpendicularly positioned under the third modulating fastener, the third modulating fastener defining a third groove, and the fourth modulating fastener defining a fourth groove extending perpendicularly to the extension direction of the third groove, each intersection of the third groove and the fourth groove forming a second locating perforation of which the position can be shifted with the relative movement between the third modulating fastener and the fourth modulating fastener, the sliding element being slidably disposed over the bottom holder to achieve a relative movement between the first locating perforation and the second locating perforation;
• and
• a plurality of hinge pin assemblies, two free ends of the torsion spring being fastened to the first perforation and the second perforation respectively by means of the hinge pin assemblies to mount the torsion spring between the first and second modulating fasteners, and between the third and fourth modulating fasteners.