Controllable feeding-type medical bone screw torsion testing device
A technology of bone screw and torsion testing, which is applied in the direction of measuring devices, testing of mechanical components, testing of machine/structural components, etc. It can solve problems such as single test form and inability to meet the evaluation requirements of torsion performance of medical bone screws
Active Publication Date: 2015-10-28
SHANGHAI UNIV
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Problems solved by technology
[0003] At present, the torsional performance of medical bone screws is mainly tested by means of industrial torque testing devices. The main test objects of this type of device are general engineering screws and bolts. Requirements of test conditions, such as constant feed force, speed and other factors; in addition, due to the wide variety of medical bone screws, the existing torsion test device can not meet the torsion performance evaluation requirements of medical bone screws with various requirements for test conditions
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[0020] The present invention will now be described more fully with reference to the accompanying drawings, in which a preferred embodiment of the invention is shown.
[0021] Such as figure 1 As shown, a controllable feed type medical bone screw torsion test device includes a drive module 1, a machine frame module 2, a specimen module 3, a connection module 4, a feed module 5, a first screw 6, and a second screw 7. The third screw 8; the feed module 5 and the connection module 4 are connected by threads, the connection module 4 and the test piece module 3 are connected by threads, and act on the test piece module 3, and the driving module 1 passes through the first The screw 6 and the second screw 7 are connected to the machine frame module 2, the test piece module 3 is connected to the machine frame module 2 through the third screw 8, and the feed module 5 is connected to the machine frame module 2 through screws.
[0022] Such as figure 2 As shown, the drive module 1 incl...
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The invention relates to a controllable feeding-type medical bone screw torsion testing device. The controllable feeding-type medical bone screw torsion testing device comprises a machine bench framework module, a connection screw, a driving module, a test piece module, a connection screw, a connection module and a feeding module. The driving module, the test piece module and the feeding module are fixed on the machine bench framework module. A three-jaw chuck clamps an implant (such as a human body bone model) and enables the implant to rotate at a speed. The feeding module is connected with the test piece module through the connection module, moves linearly under the driving of a servo motor and pushes a bone screw arranged on the test piece module and fixed by the three-jaw chuck to contact the implant and be screwed into the implant till the screw is broken or self-taped. A sensor simultaneously detects corresponding displacement, torque and torsion angle data. The testing device provided by the invention is capable of testing and evaluating the torsion performance of the medical bone screw, various kinds of testing requirements are met, the testing result is accurate, the manufacturing cost is low, and the operation is easy, etc.
Description
technical field [0001] The invention relates to an analysis and test platform, in particular to a controllable feed type medical bone screw torsion test device. Background technique [0002] As a modern common orthopedic implant device, bone screw has been widely used in clinical orthopedic treatment. However, after the orthopedic implant is placed in the body, deformation, fracture, loosening, infection, allergies, etc. may cause internal fixation failure. It has always been a practical problem that plagues the research of orthopedic implants, so the torsion angle and torque when the bone screw is twisted have also become the key indicators of the medical bone screw. Therefore, in the development and production of medical bone screws, pre-test and evaluation of their torsional characteristics should be carried out, and their torsional and compressive properties should be analyzed at the mechanical level, which is conducive to improving the quality control system in the manu...
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Inventor 华子恺陈佳佳刘诗琦杨厚廷陈心烨江健峰
Owner SHANGHAI UNIV