CN216747137U - Jig for magnesium screw pulling force test and fatigue test device - Google Patents

Jig for magnesium screw pulling force test and fatigue test device Download PDF

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Publication number
CN216747137U
CN216747137U CN202122748469.1U CN202122748469U CN216747137U CN 216747137 U CN216747137 U CN 216747137U CN 202122748469 U CN202122748469 U CN 202122748469U CN 216747137 U CN216747137 U CN 216747137U
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China
Prior art keywords
jig
limiting plate
testing
main body
cavity
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CN202122748469.1U
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Inventor
李荣慧
吴志伟
刘芳菲
刘培玉
段瑜
曾琳凯
杨颖欣
李艳芳
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Dongguan Magnesium Medical Equipment Co ltd
Dongguan Eontec Co Ltd
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Dongguan Magnesium Medical Equipment Co ltd
Dongguan Eontec Co Ltd
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Abstract

The utility model discloses a jig for testing the pulling force of a magnesium screw, which comprises a bottom mounting head, a jig main body and a limiting plate, wherein the bottom mounting head is used for connection, the bottom mounting head is mounted at the bottom of the jig main body, a cavity with an upward opening is arranged in the jig main body, the cavity is used for accommodating a piece to be tested, the limiting plate is detachably mounted at the opening of the jig main body, the limiting plate can lock the piece to be tested in the cavity when the limiting plate is connected to the jig main body, and the limiting plate is provided with a penetrating hole for the penetration of the magnesium screw. The jig for testing the pulling force of the magnesium screw can avoid clamping the piece to be tested so as to ensure the testing accuracy.

Description

Jig for magnesium screw pulling force test and fatigue test device
Technical Field
The utility model relates to the technical field of fatigue testing devices, in particular to a jig for testing the pulling force of a magnesium screw.
Background
In the clinical practice of surgery, operations such as bone grafting, joint fusion, joint fixation, and orthopedic surgery are often used for the treatment of diseases such as bone fracture and bone repair, and a fixation method is generally used in the operation. At present, metal fixing screws (stainless steel materials, titanium alloy materials and the like) are mostly adopted for clinical fracture internal fixation, and the metal fixing screws have high mechanical properties, but are not degradable and can not be absorbed by human bodies, so that a secondary operation is needed to take out a fixed object after fracture healing of a patient, and secondary pain and economic burden of the patient are increased.
The magnesium or magnesium alloy has good mechanical compatibility and biocompatibility, and is an ideal biomedical material. Therefore, biomedical magnesium alloys are receiving more and more attention from biomaterial workers worldwide. The magnesium material contains little silicon, when the magnesium material is used for preparing magnesium orthopedic screws, the magnesium screws are often required to be installed on a piece to be tested, then tensile force is applied to the magnesium screws to test the drawing force of the magnesium screws, then the existing fatigue testing devices are all used for carrying out fatigue testing in an up-down pulling mode, but when the down-pulling action is applied to the piece to be tested, the testing structure of the magnesium screws can be influenced, and the testing requirement can not be met.
In order to solve the above problems, it is necessary to provide a jig for testing the pulling force of a magnesium screw.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a jig for testing the pulling and pulling force of a magnesium screw, which can avoid clamping a piece to be tested so as to ensure the testing accuracy.
Another object of the present invention is to provide a fatigue testing device capable of preventing a test piece to be tested from being pinched to ensure testing accuracy.
In order to achieve the purpose, the jig for the magnesium screw pulling force test provided by the utility model comprises a bottom mounting head, a jig main body and a limiting plate, wherein the bottom mounting head is used for connection, the bottom mounting head is mounted at the bottom of the jig main body, a cavity with an upward opening is arranged in the jig main body, the cavity is used for accommodating a piece to be tested, the limiting plate is detachably mounted at the opening of the jig main body, the limiting plate can lock the piece to be tested in the cavity when the limiting plate is connected to the jig main body, and the limiting plate is provided with a penetrating hole for the penetration of a magnesium screw.
Preferably, the opening part of tool main part is equipped with left side groove and the right side groove of sliding, the notch in the left side groove of sliding is just right the notch in the right side groove of sliding, locate with sliding in the left side of limiting plate the left side groove of sliding, locate with sliding in the right side of limiting plate the right side groove of sliding.
Specifically, the tool main part is inwards extended to form a left protruding structure, and the left sliding groove is formed in the left protruding structure.
Specifically, the tool main part inwards extends and forms a right protruding structure, and the right sliding groove is arranged in the right protruding structure.
Specifically, the jig main body is provided with a front through hole, and the front through hole is communicated with the cavity.
Specifically, the jig main body is provided with a rear through hole, and the rear through hole is communicated with the cavity.
Specifically, the bottom mounting head is a column structure formed by extending the bottom of the jig main body downwards, and the column structure is provided with a locking hole.
Specifically, the opening is a rectangular opening.
In order to achieve the purpose, the fatigue testing device provided by the utility model comprises a base and a pull-up device arranged on the base, the fatigue testing device also comprises the jig for testing the pulling force of the magnesium screw, the base is provided with a locking part, the bottom mounting head is connected with the locking part, and the pull-up device is used for pulling out the magnesium screw from a to-be-tested part in the cavity and testing the magnesium screw.
Specifically, the fatigue test device still include the locating piece, the locating piece install in the base, the locating piece surrounds the tool main part sets up in order to fix a position.
Compared with the prior art, the jig for the magnesium screw pulling force test of the utility model combines the bottom mounting head, the jig main body, the limiting plate and the like together, the bottom mounting head is used for connecting the base of the fatigue testing device, so that the bottom mounting head is utilized to realize fixation, the bottom mounting head is mounted at the bottom of the jig main body, the jig main body is internally provided with the cavity with an upward opening, the cavity is used for accommodating a piece to be tested, the limiting plate is detachably mounted at the opening of the jig main body, the limiting plate can lock the piece to be tested in the cavity when being connected with the jig main body, the limiting plate is provided with the penetrating hole for the magnesium screw to penetrate through, the piece to be tested is placed in the cavity during testing, the piece to be tested is locked in the cavity by the limiting plate, the penetrating hole can be passed by the magnesium screw, so that the penetrating hole forms a clearance hole structure, one end of the magnesium screw is connected with the piece to be tested in the cavity, the other end of the magnesium screw can be connected with the pulling part of the fatigue testing device, so that the test is realized, and the whole piece to be tested is only pulled up by the pulling force of the magnesium screw due to the arrangement of the cavity, so that the other acting force of the fatigue testing device can be prevented from directly acting on the piece to be tested to deform the piece to be tested, the accuracy of the test is ensured, and the testing condition is met.
Drawings
Fig. 1 is a front view of the fatigue testing apparatus of the present invention.
Fig. 2 is a perspective view of a jig for a magnesium screw pulling force test in the fatigue testing apparatus according to the present invention.
Fig. 3 is a schematic structural view of the magnesium screw of the present invention in cooperation with a test piece to be tested.
Detailed Description
In order to explain technical contents, structural features, and effects achieved by the present invention in detail, the following detailed description is given with reference to the embodiments and the accompanying drawings.
Referring to fig. 1 to 3, a fatigue testing device 100 of the present invention is shown including a base 20, a pull-up device 30 and a jig 10 for testing a magnesium screw pulling force, where the pull-up device 30 is provided with a testing device (not shown), the pull-up device 30 is mounted on the base 20, a locking portion 20a is formed at a position of the base 20, the jig 10 for testing a magnesium screw pulling force includes a bottom mounting head 1, a jig main body 2 and a limiting plate 3, the bottom mounting head 1 is used for connecting the base 20 of the fatigue testing device 100, the bottom mounting head 1 is connected with the locking portion 20a, so that fixing is achieved by the bottom mounting head 1, the locking portion 20a is a downward-recessed groove structure, the bottom mounting head 1 is mounted at the bottom of the jig main body 2, and the jig main body 2 has a cavity 21 with an upward opening, preferably, the opening is a rectangular opening, but is not limited thereto. The cavity 21 is used for containing a to-be-tested piece 200, when in testing, the to-be-tested piece is placed in the cavity 21 to be fixed, the limiting plate 3 is detachably arranged at the opening of the jig main body 2, when the limiting plate 3 is connected to the jig main body 2, the limiting plate 3 can lock the to-be-tested piece 200 in the cavity 21, so that the to-be-tested piece 200 is locked in the cavity 21, the limiting plate 3 is provided with a penetrating hole 31, the penetrating hole 31 can be penetrated by the magnesium screw 300, when in testing, the to-be-tested piece 200 is placed in the cavity 21, the to-be-tested piece 200 is locked in the cavity 21 through the limiting plate 3, and the penetrating hole 31 can be penetrated by the magnesium screw 300, so that the penetrating hole 31 forms a clearance hole structure, one end of the magnesium screw 300 is connected with the to-be-tested piece 200 in the cavity 21, the other end of the magnesium screw 300 can be connected with the pulling part of the fatigue testing device 100, so as to realize testing, and the testing, because the setting of the cavity 21, the to make the to-be-tested piece 200 integrally only receive the pulling force of the magnesium screw 300, therefore, other acting forces of the fatigue testing device 100 can be prevented from directly acting on the piece to be tested 200 to deform the piece to be tested, so that the testing accuracy is ensured, and the testing condition is met. The pull-up device 30 is used to pull out and test the magnesium screw 300 from the test piece 200 in the cavity 21. More specifically, the following:
referring to fig. 1 to 3, a left sliding groove 22 and a right sliding groove 23 are disposed at an opening of the jig main body 2, a notch of the left sliding groove 22 faces a notch of the right sliding groove 23, a left side of the limiting plate 3 is slidably disposed in the left sliding groove 22, and a right side of the limiting plate 3 is slidably disposed in the right sliding groove 23, so that the limiting plate 3 can be slidably mounted and dismounted relative to the jig main body 2. More specifically, tool main part 2 inwards extends and forms left protruding structure 24, and left side groove 22 of sliding is seted up in left protruding structure 24, and tool main part 2 inwards extends and forms right protruding structure 25, and right side groove 23 of sliding is seted up in right protruding structure 25 to it is more compact to make between each part.
Referring to fig. 1 to 3, the jig main body 2 has a front through hole 26, the front through hole 26 is communicated with the cavity 21, the jig main body 2 has a rear through hole 27, the rear through hole 27 is communicated with the cavity 21, and the arrangement of the front through hole 26 and the rear through hole 27 enables the jig main body 2 to be suitable for test pieces 200 to be tested with more sizes, and the universality is high.
Referring to fig. 1 to 3, the bottom mounting head 1 is a column structure formed by extending the bottom of the jig main body 2 downward, the column structure is provided with a locking hole (not shown), and the locking portion 20a has a locking post (not shown) matching with the locking hole and slidably disposed, so as to realize the detachable connection of the bottom mounting head 1.
Referring to fig. 1 to 3, the fatigue testing device 100 of the present invention further includes a positioning block 40, the positioning block 40 is mounted on the base 20, the positioning block 40 is disposed around the jig main body 2 for positioning, and when the jig needs to be used, the bottom of the jig main body 2 is placed in a positioning cavity surrounded by the positioning block 40, so as to achieve positioning.
In summary, referring to fig. 1 to 3, a detailed description is made of the usage process of the fatigue testing device 100 of the present invention:
the jig main body 2 is placed in the cavity 21, the bottom mounting head 1 is connected with the locking portion 20a, a to-be-tested piece 200 with the magnesium screw 300 is placed below the limiting plate 3, the magnesium screw 300 penetrates through the penetrating hole 31, the to-be-tested piece 200 slides into the cavity 21 of the jig main body 2 along with the limiting plate 3, the limiting plate 3 slides into the left sliding groove 22 and the right sliding groove 23 of the jig main body 2, so that connection between the limiting plate 3 and the jig main body 2 is achieved, and the pull-up device 30 is used for pulling out and testing the magnesium screw 300 from the to-be-tested piece 200 in the cavity 21.
The bottom mounting head 1, the jig main body 2 and the limiting plate 3 are combined together, the bottom mounting head 1 is used for connecting a base 20 of the fatigue testing device 100, so that the bottom mounting head 1 is used for realizing fixation, the bottom mounting head 1 is mounted at the bottom of the jig main body 2, a cavity 21 with an upward opening is arranged in the jig main body 2, the cavity 21 is used for accommodating a piece to be tested 200, the limiting plate 3 is detachably mounted at the opening of the jig main body 2, the limiting plate 3 can lock the piece to be tested 200 in the cavity 21 when the limiting plate 3 is connected to the jig main body 2, the limiting plate 3 is provided with a penetrating hole 31 for the penetration of a magnesium screw 300, the piece to be tested 200 is placed in the cavity 21 during testing, the piece to be tested 200 is locked in the cavity 21 by the limiting plate 3, and the penetrating hole 31 can be passed by the magnesium screw 300 due to the limiting plate 3, so that the penetrating hole 31 forms a clearance hole structure, one end of the magnesium screw 300 is connected with the piece 200 to be tested in the cavity 21, the other end of the magnesium screw 300 can be connected with the pulling part of the fatigue testing device 100, so that the test is realized, and the cavity 21 is arranged so that the whole piece 200 to be tested only receives the pulling force of one pull-up of the magnesium screw 300, thereby avoiding the other acting forces of the fatigue testing device 100 from directly acting on the piece 200 to be tested to deform the piece 200 to be tested, so that the accuracy of the test is ensured, and the testing condition is met.
The above disclosure is only a preferred embodiment of the present invention, and certainly should not be taken as limiting the scope of the present invention, which is therefore intended to cover all equivalent changes and modifications within the scope of the present invention.

Claims (10)

1. The utility model provides a jig for magnesium screw pulling force test, its characterized in that includes bottom installation head, tool main part and limiting plate, bottom installation head is used for connecting, bottom installation head install in the bottom of tool main part, the cavity up has the opening in the tool main part, the cavity is used for holding the piece of waiting to test, limiting plate detachably install in the opening part of tool main part, limiting plate connect in during the tool main part the limiting plate can with the piece of waiting to test lock in the cavity, the limiting plate has the hole of wearing that supplies the magnesium screw to wear to put.
2. The jig for testing the pulling force of a magnesium screw according to claim 1, wherein a left sliding groove and a right sliding groove are formed at an opening of the jig main body, a notch of the left sliding groove faces a notch of the right sliding groove, a left side of the limiting plate is slidably disposed in the left sliding groove, and a right side of the limiting plate is slidably disposed in the right sliding groove.
3. The jig for testing pulling force of magnesium screw according to claim 2, wherein the jig main body extends inward to form a left protrusion structure, and the left sliding groove is disposed on the left protrusion structure.
4. The jig for testing pulling force of magnesium screw according to claim 2, wherein the jig main body extends inward to form a right protrusion structure, and the right sliding groove is opened in the right protrusion structure.
5. The jig for testing magnesium screw pulling force according to claim 1, wherein the jig main body has a front through hole, and the front through hole is communicated with the cavity.
6. The jig for testing pulling force of magnesium screw according to claim 1, wherein the jig main body has a rear through hole, and the rear through hole is communicated with the cavity.
7. The jig for testing pulling force of magnesium screw according to claim 1, wherein the bottom mounting head is a column structure formed by extending downward from the bottom of the jig main body, and the column structure is provided with a locking hole.
8. The jig for testing magnesium screw pullout force according to claim 1, wherein the opening is a rectangular opening.
9. A fatigue testing device comprises a base and a pull-up device installed on the base, and is characterized by further comprising the jig for the magnesium screw pulling force test in any one of claims 1 to 8, wherein a locking part is formed at the base, the bottom mounting head is connected with the locking part, and the pull-up device is used for pulling out and testing a magnesium screw from a to-be-tested part in the cavity.
10. The fatigue testing device of claim 9, further comprising a positioning block mounted to the base, the positioning block being disposed around the jig body for positioning.
CN202122748469.1U 2021-11-10 2021-11-10 Jig for magnesium screw pulling force test and fatigue test device Active CN216747137U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202122748469.1U CN216747137U (en) 2021-11-10 2021-11-10 Jig for magnesium screw pulling force test and fatigue test device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122748469.1U CN216747137U (en) 2021-11-10 2021-11-10 Jig for magnesium screw pulling force test and fatigue test device

Publications (1)

Publication Number Publication Date
CN216747137U true CN216747137U (en) 2022-06-14

Family

ID=81925520

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202122748469.1U Active CN216747137U (en) 2021-11-10 2021-11-10 Jig for magnesium screw pulling force test and fatigue test device

Country Status (1)

Country Link
CN (1) CN216747137U (en)

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