CN112255128A - Vascular stent mechanics loading device - Google Patents
Vascular stent mechanics loading device Download PDFInfo
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- CN112255128A CN112255128A CN202011136673.1A CN202011136673A CN112255128A CN 112255128 A CN112255128 A CN 112255128A CN 202011136673 A CN202011136673 A CN 202011136673A CN 112255128 A CN112255128 A CN 112255128A
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- rack
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- jaw chuck
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- 230000002792 vascular Effects 0.000 title claims abstract description 33
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- 210000004204 blood vessel Anatomy 0.000 claims description 13
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 11
- 238000005452 bending Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 201000001320 Atherosclerosis Diseases 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003511 endothelial effect Effects 0.000 description 1
- 206010020718 hyperplasia Diseases 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 208000037803 restenosis Diseases 0.000 description 1
- 230000002966 stenotic effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/38—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Electromagnetism (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The invention discloses a vascular stent mechanics loading device, wherein a T-shaped groove is arranged above a base, three T-shaped supporting blocks which are matched with the T-shaped groove in shape and can slide in the T-shaped groove are arranged in the T-shaped groove, a limiting device is arranged at the top of the T-shaped supporting block in the middle, a three-jaw chuck is respectively arranged above the two T-shaped supporting blocks at the side part, a longitudinally arranged rack is connected on the limiting device in a sliding manner, a lantern ring is arranged at the bottom of the rack, and a driving mechanism for driving the rack to move up and down is arranged at the side part of the limiting device. The device's simple structure, convenient operation can effectively carry out bending property test to different specifications (diameter and length) vascular supports, and the vascular support that the test is qualified is arranged in interveneing the operation, can reduce the risk that vascular support intervened the operation, guarantees patient's life safety.
Description
Technical Field
The invention belongs to the technical field of intravascular stent testing, and particularly relates to an intravascular stent mechanical loading device.
Background
The intravascular stent is an external structure which is used for placing an internal stent in a lesion section on the basis of the expansion forming of a lumen balloon so as to support a blood vessel at a stenotic occlusion section, reduce the elastic retraction and reshaping of the blood vessel and keep the blood flow of the lumen unobstructed, and is clinically used for treating atherosclerosis by an interventional intravascular stent method. Nowadays, with the development of material manufacturing industry and technical level, the requirements for vascular stents are more and more, and although the treatment method of interventional vascular stents is very effective, the problems of restenosis, thrombus, endothelial hyperplasia and the like in blood vessels still can occur after operation, and the problems are closely related to the mechanical properties of the vascular stents.
In the process of interventional operation of the vascular stent, the good bending performance of the vascular stent can reduce the risk of the operation and ensure the life safety of a patient. In the prior art, a mechanical loading device which is simple in structure and strong in universality and is specially used for bending performance test of the intravascular stent does not exist.
Disclosure of Invention
Aiming at the problems, the invention aims to provide the vascular stent mechanical loading device which is simple in structure and convenient to operate and can effectively test the bending performance of the vascular stent.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a mechanical loading device for a vascular stent is characterized in that a T-shaped groove is formed above a base, three T-shaped supporting blocks which are matched with the T-shaped groove in shape and can slide in the T-shaped groove are arranged in the T-shaped groove, a limiting device is arranged at the top of the middle T-shaped supporting block, a three-jaw chuck is respectively arranged above the two T-shaped supporting blocks at the side part, a rack which is longitudinally arranged is connected on the limiting device in a sliding mode, a lantern ring is arranged at the bottom of the rack, and a driving mechanism which drives the rack to move up and down is arranged at the side part of.
Furthermore, the limiting device comprises a fixing rod and a limiting slide rod, the fixing rod is vertically fixed above the T-shaped supporting block, a group of limiting slide rods are respectively arranged at the upper end and the lower end of the fixing rod, slide blocks are arranged on the opposite inner side faces of the limiting slide rods, longitudinal slide grooves matched with the upper end and the lower end of the rack are respectively arranged at the positions corresponding to the slide blocks, and the slide blocks on the limiting slide rods are connected in the slide grooves on the corresponding sides and can longitudinally slide along the slide grooves.
Furthermore, the driving mechanism comprises a motor, a disc and a swinging gear, the motor is arranged on a supporting seat, the supporting seat is arranged above the base, the disc is coaxially connected with a motor shaft of the motor, and the disc is connected with the swinging gear through a cylindrical pin; the swing gear comprises a sector gear end and a long handle end, wherein the sector gear end and the long handle end are integrally formed, the sector gear end is meshed with the rack, and the cylindrical pin penetrates through the slot in the long handle end and then is fixedly connected with the disc.
Furthermore, the wrench insertion holes of the three-jaw chuck are formed in the top of the three-jaw chuck, and the inner side ends of the three jaws of the three-jaw chuck are provided with the convex blocks.
Furthermore, the diameter of the lantern ring is the same as that of the through hole in the middle of the three-jaw chuck, and the through holes in the two three-jaw chucks and the lantern ring are arranged in parallel in a centering mode.
Furthermore, a plurality of pin holes are transversely formed in the disc along the diameter of the disc, and the cylindrical pin can penetrate through the long handle end and different pin holes to fix the swing gear and the disc.
The invention has the beneficial effects that:
1. the vascular stent mechanical loading device disclosed by the invention is simple in structure and convenient to operate, can effectively test the bending performance of vascular stents with different specifications (diameters and lengths), and can reduce the risk of vascular stent interventional operation and ensure the life safety of a patient when the tested vascular stent is used in the interventional operation;
2. before testing, the two three-jaw chucks can freely move in the trapezoidal grooves, so that the fixing of vascular stents with different lengths can be realized, the fixing of vascular stents with different diameters can be realized due to the free contraction characteristic of the three-jaw chucks, and the small protrusions arranged on the three jaws can effectively prevent the axial displacement generated in the bending process of the vascular stent, so that the universality of the device and the stability in the operation process are effectively guaranteed;
3. different pin holes are formed in the disc, the fixing position of the positioning pin can be changed, bending loading of the intravascular stent in multiple sections and different degrees is achieved by changing the swing amplitude of the swing gear, and test data are more detailed and reliable.
Drawings
FIG. 1 is a schematic structural diagram of a mechanical loading device for a vascular stent;
FIG. 2 is a schematic structural view of a three-jaw chuck;
FIG. 3 is a schematic view of the drive mechanism;
the blood vessel stent comprises a base 1, a 2-T-shaped groove, a 3-T-shaped supporting block, a 4-limiting device, a 5-three-jaw chuck, a 6-rack, a 7-lantern ring, an 8-driving mechanism and a 9-blood vessel stent, wherein the base is provided with a groove;
41-fixed rod, 42-limit slide rod, 43-chute;
51-wrench insertion hole, 52-jaw, 53-bump;
81-motor, 82-disc, 83-oscillating gear, 84-supporting seat, 85-cylindrical pin;
831-sector gear end, 832-long handle end;
821-pin hole.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following further describes the technical solution of the present invention with reference to the accompanying drawings.
It should be noted that the embodiment provided by the present invention is only for effectively explaining the technical features of the present invention, and the terms of positioning such as left side, right side, upper end, lower end, etc. are only for better describing the embodiment of the present invention and should not be construed as limiting the technical solution of the present invention.
In order to effectively and simply carry out an in-vitro loading test on a vascular stent and to know the bending performance of the vascular stent more clearly, the embodiment provides a vascular stent mechanical loading device, wherein a T-shaped groove 2 is arranged above a base 1, three T-shaped supporting blocks 3 which are matched with the T-shaped groove 2 in shape and can slide along the groove are arranged in the T-shaped groove 2, a limiting device 4 is arranged at the top of the T-shaped supporting block 3 in the middle, three-jaw chucks 5 are respectively arranged above the two T-shaped supporting blocks 3 at the side part, a rack 6 which is longitudinally arranged is connected on the limiting device 4 in a sliding manner, a lantern ring 7 is arranged at the bottom of the rack 6, and a driving mechanism 8 which drives the rack 6 to move up and down is arranged at the side part of the limiting device.
The limiting device 4 comprises a fixing rod 41 and a limiting slide rod 42, the fixing rod 41 is vertically fixed above the T-shaped supporting block 3, a group of limiting slide rods 42 are respectively arranged at the upper end and the lower end of the fixing rod 41, a slide block is arranged on the opposite inner side surface of the limiting slide rod 42, longitudinal slide grooves 43 are respectively arranged at the positions, corresponding to the slide blocks, of the upper end and the lower end of the rack 6, and the slide blocks on the limiting slide rods 42 are connected in the slide grooves 43 at the corresponding sides and can longitudinally slide along the slide grooves.
The driving mechanism 8 comprises a motor 81, a disc 82 and a swing gear 83, the motor 81 is arranged on a supporting seat 84, the supporting seat 84 is arranged above the base 1, the disc 82 is coaxially connected with a motor shaft of the motor 81, the swing gear 83 is connected on the disc 82 through a cylindrical pin 85, the swing gear 83 comprises a sector gear end 831 and a long handle end 832 with a slot in the middle, the sector gear end 831 is meshed with the rack 6 so as to convert the swing motion of the sector gear end 831 into the longitudinal movement of the rack 6 on the limiting device 4, and the cylindrical pin 85 penetrates through the slot in the long handle end 832 and then is fixedly connected with the disc 82.
In order to change the swing amplitude of the sector gear end 831 to adapt to different experimental requirements and obtain comprehensive and accurate data more flexibly, a plurality of pin holes 821 are transversely arranged on the disc 82 along the diameter of the disc, and the cylindrical pin 85 can pass through the long handle end 832 and different pin holes 821 to realize the fixation of the swing gear 83 and the disc 82.
The wrench insertion holes 51 of the three-jaw chuck 5 are formed at the top of the three-jaw chuck 5, and the inner ends of the three jaws 52 of the three-jaw chuck 5 are formed with the protrusions 53.
The diameter of the lantern ring 7 is the same as that of the through hole in the middle of the three-jaw chuck 5, and the through holes in the two three-jaw chucks 5 and the lantern ring 7 are arranged in parallel in a centering mode.
The specific operation flow is as follows:
before testing, firstly adjusting the distance between the two three-jaw chucks 5 according to the length of the blood vessel support 9, adjusting the diameter of an inner hole of the three-jaw chuck 5 to be maximum by using a chuck wrench after the distance is adjusted to be proper, then enabling the blood vessel support 9 to penetrate through the two three-jaw chucks 5 and the lantern ring 7, then adjusting the diameter of the three-jaw chuck 5 by using the chuck wrench, and based on the condition that the blood vessel support 9 is fixed but not extruded, at the moment, the bulge blocks 53 at the inner side ends of the three jaws 52 on the three-jaw chuck 5 can be clamped in gaps of the blood vessel support 9, specifically presenting the state shown in figure 1, and completing the positioning and fixing work of the blood vessel support 9, at the moment, the blood vessel support 9 cannot be displaced in the axial direction and the circumferential direction, and the three T-shaped support blocks 3 are all in.
Further, the motor 81 is started, the motor 81 drives the disc 82 to perform circular motion, the circular rotation of the disc 82 drives the swing gear 83 to swing, the swing gear 83 and the rack 6 are meshed, the rack 6 can do up-and-down reciprocating motion under the action of the swing gear 83, therefore, up-and-down reciprocating motion of the lantern ring 7 is achieved, finally, the lantern ring 7 drives a certain part of the blood vessel support 9 to do up-and-down reciprocating bending motion, and automatic bending performance testing of the blood vessel support 9 can be achieved.
The device can be according to the length of the vascular support 9 that awaits measuring and the different distance between two three-jaw chuck 5 of change of diameter to and the elasticity degree of jack catch 52 satisfies the location and the fixed of the vascular support 9 of different length and different diameters on the adjustment three-jaw chuck 5, during the installation before the test, can be according to the different positions of the vascular support 9 that the experiment needs were tested, change rack 6, the requirement of experiment is satisfied to the relative position of actuating mechanism 8 and three-jaw chuck 5, it is more convenient, the flexibility of whole device is stronger.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. However, the above description is only an example of the present invention, the technical features of the present invention are not limited thereto, and any other embodiments that can be obtained by those skilled in the art without departing from the technical solution of the present invention should be covered by the claims of the present invention.
Claims (6)
1. The utility model provides a vascular support mechanics loading device, its characterized in that is equipped with T type groove (2) above base (1), be equipped with three T type supporting shoe (3) rather than shape adaptation and can slide in it in T type groove (2), the top that is located middle T type supporting shoe (3) is equipped with stop device (4), the top of two T type supporting shoes (3) of lateral part is equipped with a three-jaw chuck (5) respectively, sliding connection one vertically set up rack (6) on stop device (4), the bottom of rack (6) is equipped with lantern ring (7), lateral part at stop device (4) is equipped with actuating mechanism (8) that drive rack (6) up-and-down motion.
2. The mechanical loading device for the vascular stent as defined in claim 1, wherein the limiting device (4) comprises a fixing rod (41) and a limiting slide rod (42), the fixing rod (41) is vertically fixed above the T-shaped supporting block (3), a set of limiting slide rods (42) are respectively arranged at the upper end and the lower end of the fixing rod (41), slide blocks are arranged on the opposite inner side surfaces of the limiting slide rods (42), longitudinal slide grooves (43) adapted to the slide blocks are respectively arranged at the positions of the upper end and the lower end of the rack (6) corresponding to the slide blocks, and the slide blocks on the limiting slide rods (42) are connected in and can longitudinally slide along the slide grooves (43) on the corresponding side.
3. The mechanical loading device for the vascular stent according to claim 1, wherein the driving mechanism (8) comprises a motor (81), a disk (82) and a swinging gear (83), the motor (81) is arranged on a supporting seat (84), the supporting seat (84) is arranged above the base (1), the disk (82) is coaxially connected with a motor shaft of the motor (81), and the disk (82) is connected with the swinging gear (83) through a cylindrical pin (85); the swing gear (83) comprises a fan-shaped gear end (831) and a long handle end (832) with a slot in the middle, the fan-shaped gear end (831) is meshed with the rack (6), and the cylindrical pin (85) penetrates through the slot in the long handle end (832) and then is fixedly connected with the disc (82).
4. The mechanical loading device for the blood vessel stent as claimed in claim 1, wherein the wrench insertion holes (51) of the three-jaw chuck (5) are arranged at the top of the three-jaw chuck (5), and the inner ends of the three jaws (52) of the three-jaw chuck (5) are provided with the convex blocks (53).
5. The mechanical loading device for the vascular stent as defined in claim 1, wherein the diameter of the lantern ring (7) is the same as the diameter of the through hole in the middle of the three-jaw chuck (5), and the through holes on the two three-jaw chucks (5) and the lantern ring (7) are placed in parallel in a centering way.
6. The mechanical loading device for the vascular stent as defined in claim 3, wherein a plurality of pin holes (821) are transversely arranged on the disc (82) along the diameter of the disc, and the cylindrical pin (85) can pass through the long handle end (832) and different pin holes (821) to realize the fixation of the oscillating gear (83) and the disc (82).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011136673.1A CN112255128A (en) | 2020-10-22 | 2020-10-22 | Vascular stent mechanics loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011136673.1A CN112255128A (en) | 2020-10-22 | 2020-10-22 | Vascular stent mechanics loading device |
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| Publication Number | Publication Date |
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| CN112255128A true CN112255128A (en) | 2021-01-22 |
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| CN202011136673.1A Pending CN112255128A (en) | 2020-10-22 | 2020-10-22 | Vascular stent mechanics loading device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117571522A (en) * | 2024-01-16 | 2024-02-20 | 首都医科大学附属北京友谊医院 | Vascular stent external loading testing device |
| CN118010336A (en) * | 2024-04-09 | 2024-05-10 | 太原理工大学 | Bending and twisting performance testing device for vascular stent |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117571522A (en) * | 2024-01-16 | 2024-02-20 | 首都医科大学附属北京友谊医院 | Vascular stent external loading testing device |
| CN117571522B (en) * | 2024-01-16 | 2024-05-14 | 首都医科大学附属北京友谊医院 | Vascular stent external loading testing device |
| CN118010336A (en) * | 2024-04-09 | 2024-05-10 | 太原理工大学 | Bending and twisting performance testing device for vascular stent |
| CN118010336B (en) * | 2024-04-09 | 2024-06-04 | 太原理工大学 | Bending and twisting performance testing device for vascular stent |
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