Portable electric tension tester with movable mouth chunck

The utility model relates to a portable electrical tensile testing machine with a couple of moveable jaw gripping heads. The testing machine belonging to the machinery field is a device that is used for detecting breaking strength, yielding strength, cutting off strength, peeling strength, tearing rate, yielding and extending rate of a material and the welding unit of the material. Wherein, outer cover (1) of the utility model is provided with a bearing rack A (7) and a bearing rack B (7) that jointly support a threaded spindle (9), which is sleeved with the jaw gripping head B. A jaw gripping head B is sleeved onto one more supporting mechanism. The outer cover also is provided with a motor and a speed reducer (5). At first, the jaw gripping head A is fixed onto the position of (6); the motor drives the thread spindle slowly rotate through the speed reducer so that the jaw gripper head B moves to the left side from an ultra right position (8) until the testing article is destroyed. Finally, a control and digital displaying component (3) displays all the data. If the tested article is still not been destroyed when the jaw gripper head is moved to the ultra left position (10), the jaw gripper head A can be repeatedly shifted to the positions of (4) or (2). The utility model has the advantages of short machine body, low cost and portable taking operation.