Controlled feed type medical bone screw torsion test device
A technology for bone screw and torsion testing, which is applied to measuring devices, testing of mechanical components, and testing of machine/structural components, etc., can solve problems such as failure to meet the evaluation requirements of torsional performance of medical bone screws and single test form.
Active Publication Date: 2017-11-10
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 feed type medical bone screw torsion test device, which comprises a machine frame module, a connecting screw, a driving module, a test piece module, a connecting screw, a connecting module and a feeding module. The drive module, specimen module and feed module are fixed on the frame module of the machine. The three-jaw chuck on the drive module clamps the implant (such as a human bone model) and makes it rotate at a speed. The feed module connects The module is connected with the test piece module, and it moves linearly under the drive of the servo motor, pushing the bone screw fixed by the three-jaw chuck on the test piece module to contact and screw in the implant until the screw breaks or self-tapping, and the sensor measures at the same time Corresponding displacement, torque and torsion angle data. The test device of the present invention can test and evaluate the torsion performance of the medical bone screw, supports various test requirements, has the characteristics of accurate test results, low manufacturing cost, and easy operation.
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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IPC IPC(8): G01M13/00
Inventor 华子恺张克玉杜联星陈佳佳刘诗琦陈心烨江健峰
Owner SHANGHAI UNIV