CN215767611U - Intravascular stent fatigue test device - Google Patents
Intravascular stent fatigue test device Download PDFInfo
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- CN215767611U CN215767611U CN202120402430.1U CN202120402430U CN215767611U CN 215767611 U CN215767611 U CN 215767611U CN 202120402430 U CN202120402430 U CN 202120402430U CN 215767611 U CN215767611 U CN 215767611U
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Abstract
The utility model discloses a blood vessel support fatigue test device, including backup pad, base, driving motor, thrust unit, stop device and fixing device, be equipped with the block spout on the base, the backup pad slides and locates in the block spout, stop device locates in the backup pad, the backup pad is equipped with two sets ofly about base axis symmetry, stop device corresponds the setting with the backup pad, thrust unit locates between two sets of backup pads, and is two sets of the backup pad is first backup pad and second backup pad respectively, be equipped with the fixed chamber of lateral wall open-ended in the first backup pad, fixing device locates fixed intracavity, driving motor locates on the second backup pad lateral wall. The utility model relates to the technical field of fatigue test machinery, and particularly provides a vascular stent fatigue test device which is stable in installation of a positioning shaft and meets vascular stents with different diameters and lengths.
Description
Technical Field
The utility model relates to the technical field of fatigue test machinery, in particular to a fatigue test device for a vascular stent.
Background
With the rapid development of economy in China, the improvement of the living standard of people and the change of life style, various diseases come with the improvement of the living standard of people; the intravascular stent is characterized in that a intravascular stent embedded technology is adopted in most of treatment methods for patients with vascular occlusion in China, and the intravascular stent is characterized in that an inner stent is embedded in a lesion section on the basis of the expansion forming of a lumen balloon so as to achieve the purposes of supporting a blood vessel at a stenotic occlusion section, reducing the elastic retraction and reshaping of the blood vessel and keeping the blood flow of the lumen unobstructed; part of the internal support also has the function of preventing restenosis; the interventional stent is an important factor for determining the effect of the operation, and in addition to the complications accompanying the intervention into the human body, consideration is also given to the dilatation fatigue performance of the stent and fatigue damage to the blood vessel caused by the interaction stress generated by the reciprocating motion of the stent.
SUMMERY OF THE UTILITY MODEL
In order to overcome the technical defects, the utility model provides the vascular stent fatigue testing device which is stable in installation of the positioning shaft and can meet vascular stents with different diameters and lengths.
The technical scheme adopted by the utility model is as follows: the utility model discloses a fatigue testing device for a blood vessel support, which comprises a supporting plate, a base, a driving motor, a pushing device, a limiting device and a fixing device, wherein a clamping chute is arranged on the base, the supporting plate is arranged in the clamping chute in a sliding manner, the limiting device is arranged on the supporting plate, the supporting plate is symmetrically provided with two groups about the central axis of the base, the limiting device and the supporting plate are arranged correspondingly, the pushing device is arranged between the two groups of supporting plates, the two groups of supporting plates are respectively a first supporting plate and a second supporting plate, a fixing cavity with an opening on the side wall is arranged in the first supporting plate, the fixing device is arranged in the fixing cavity, the driving motor is arranged on the side wall of the second supporting plate, and the driving motor drives the pushing device to rotate; the side wall of the base is provided with a first threaded hole, a fixing screw is arranged in the first threaded hole, the side wall of the supporting plate is provided with a second threaded hole, and the base and the supporting plate are fastened and connected through the fixing screw; the limiting device comprises a transmission motor, a transmission screw, a guide shaft and a limiting disc, the transmission motor is arranged on the side wall of the first supporting plate, one end of the transmission screw is rotatably arranged on the side wall of the first supporting plate, the transmission screw is connected with an output shaft of the transmission motor, the guide shaft is arranged on the side wall of the first supporting plate, the transmission screw and the guide shaft are correspondingly arranged about the central axis of the first supporting plate, the limiting disc is arranged on the transmission screw in a threaded connection mode, the limiting disc is arranged on the guide shaft in a sliding mode, and a through hole is formed in the limiting disc; the fixing device comprises an elastic rod, a buffer spring and an installation block, wherein one end of the elastic rod is arranged on the side wall of the fixing cavity, the installation block is arranged at the other end of the elastic rod, the buffer spring is arranged on the elastic rod in a sliding manner, one end of the buffer spring is arranged on the side wall of the fixing cavity, and the other end of the buffer spring is arranged on the installation block; the pushing device comprises a positioning shaft, a push rod, a reset spring, a driving shaft, fixing nuts and a cam, wherein two ends of the driving shaft sequentially penetrate through two groups of through holes to be respectively and rotatably arranged on two groups of supporting plate side walls, one end of the driving shaft is connected with an output shaft of a driving motor, the driving shaft side walls are provided with thread groups, the cam is arranged on the driving shaft through threaded connection, the fixing nuts are arranged on the driving shaft through threaded connection, two groups of fixing nuts are arranged on the fixing nuts, the cam is slidably arranged between the two groups of fixing nuts, the cam is locked and connected with the driving shaft through the two groups of fixing nuts, one end of the positioning shaft sequentially penetrates through the two groups of through holes to be arranged on the second supporting plate side walls, the other end of the positioning shaft is provided with a positioning groove, the mounting block is slidably arranged in the positioning groove, the positioning shaft is provided with a mounting hole, the push rod is slidably arranged in the mounting hole, the push rod is the setting of T font structure, the push rod is located same vertical plane with the cam, the epaxial solid fixed ring that is equipped with of location, reset spring one end is located on the push rod, the couple of the reset spring other end slides and locates on solid fixed ring.
Further, the mounting hole is equipped with the multiunit, and the multiunit the mounting hole is the equidistance and distributes to test the vascular support of different length.
Furthermore, a rubber layer is arranged on one surface, close to the intravascular stent, of the push rod, the surface, close to the intravascular stent, of the push rod is arranged in an annular structure, the rubber layer reduces the phenomenon of stress concentration in the expansion process of the intravascular stent, and the shape of the end face, in contact with the intravascular stent, of the push rod corresponds to the shape of the intravascular stent, so that the intravascular stent is conveniently and better unfolded.
Furthermore, the location axle is equipped with three groups, three groups the location axle uses the drive shaft axis of rotation to be circumference evenly distributed as the center, push rod and fixing device all correspond the setting with the location axle, three groups the push rod cooperates with the cam on same vertical plane, and the cam drives the push rod and struts the blood vessel support simultaneously in the direction of difference, prevents that the blood vessel support from strutting to same direction when, and the blood vessel support takes place the displacement along this direction, struts the blood vessel support simultaneously for the blood vessel support expansion maximize.
Furthermore, the first threaded holes are symmetrically provided with two groups about a central axis of the base, and the fixing screws are arranged corresponding to the first threaded holes.
Furthermore, the thread groups are provided with a plurality of groups which are distributed at equal intervals so as to facilitate the movement of the cam position.
Further, the transmission motor is a forward and reverse rotation motor.
The utility model with the structure has the following beneficial effects: according to the vascular stent fatigue testing device, the rapid disassembly and fixed support of the vascular stent fatigue testing device on the positioning shaft are realized through the fixing device, the first supporting plate is convenient to disassemble, and the vascular stent is sleeved on the positioning shaft; the fatigue test of the intravascular stent fatigue test device on intravascular stents with different lengths is realized through the two groups of limiting devices, and the fatigue test of the intravascular stent fatigue test device on intravascular stents with different diameters is realized through the replacement of the push rod.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a schematic structural view of a fatigue testing device for a vascular stent according to the present invention;
fig. 2 is a partially enlarged view of a portion a of fig. 1;
fig. 3 is a partially enlarged view of a portion B of fig. 1.
The device comprises a base 1, a base 2, a driving motor 3, a pushing device 4, a limiting device 5, a fixing device 6, a first supporting plate 7, a second supporting plate 8, a fixing cavity 9, a fixing screw 10, a transmission motor 11, a transmission screw rod 12, a guide shaft 13, a limiting disc 14, an elastic rod 15, a buffer spring 16, an installation block 17, a through hole 18, a positioning shaft 19, a push rod 20, a reset spring 21, a driving shaft 22, a fixing nut 23, a cam 24, a positioning groove 25, a fixing ring 26 and a rubber layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in fig. 1 to 3, the technical scheme adopted by the utility model is as follows: a fatigue testing device for a vascular stent comprises a supporting plate, a base 1, a driving motor 2, a pushing device 3, a limiting device 4 and a fixing device 5, wherein a clamping chute is formed in the base 1, the supporting plate is slidably arranged in the clamping chute, the limiting device 4 is arranged on the supporting plate, two groups of supporting plates are symmetrically arranged about the axis of the base 1, the limiting device 4 and the supporting plate are arranged correspondingly, the pushing device 3 is arranged between the two groups of supporting plates, the two groups of supporting plates are respectively a first supporting plate 6 and a second supporting plate 7, a fixing cavity 8 with an opening on the side wall is formed in the first supporting plate 6, the fixing device 5 is arranged in the fixing cavity 8, the driving motor 2 is arranged on the side wall of the second supporting plate 7, and the driving motor 2 drives the pushing device 3 to rotate; the side wall of the base 1 is provided with a first threaded hole, a fixing screw 9 is arranged in the first threaded hole, the side wall of the supporting plate is provided with a second threaded hole, and the base 1 and the supporting plate are fastened and connected through the fixing screw 9; the limiting device 4 comprises a transmission motor 10, a transmission screw 11, a guide shaft 12 and a limiting disc 13, the transmission motor 10 is arranged on the side wall of the first supporting plate 6, one end of the transmission screw 11 is rotatably arranged on the side wall of the first supporting plate 6, the transmission screw 11 is connected with an output shaft of the transmission motor 10, the guide shaft 12 is arranged on the side wall of the first supporting plate 6, the transmission screw 11 and the guide shaft 12 are correspondingly arranged relative to the central axis of the first supporting plate 6, the limiting disc 13 is arranged on the transmission screw 11 through threaded connection, the limiting disc 13 is slidably arranged on the guide shaft 12, and a through hole 17 is formed in the limiting disc 13; the fixing device 5 comprises an elastic rod 14, a buffer spring 15 and an installation block 16, one end of the elastic rod 14 is arranged on the side wall of the fixing cavity 8, the installation block 16 is arranged at the other end of the elastic rod 14, the buffer spring 15 is arranged on the elastic rod 14 in a sliding manner, one end of the buffer spring 15 is arranged on the side wall of the fixing cavity 8, and the other end of the buffer spring 15 is arranged on the installation block 16; the pushing device 3 comprises a positioning shaft 18, a push rod 19, a reset spring 20, a driving shaft 21, fixing nuts 22 and a cam 23, two ends of the driving shaft 21 sequentially penetrate through two groups of through holes 17 to be respectively rotatably arranged on two groups of supporting plate side walls, one end of the driving shaft 21 is connected with an output shaft of the driving motor 2, the side wall of the driving shaft 21 is provided with a thread group, the cam 23 is arranged on the driving shaft 21 through thread connection, the fixing nuts 22 are arranged in two groups, the cam 23 is slidably arranged between the two groups of fixing nuts 22, the cam 23 is in locking connection with the driving shaft 21 through the two groups of fixing nuts 22, one end of the positioning shaft 18 sequentially penetrates through the two groups of through holes 17 to be arranged on the side wall of the second supporting plate 7, the other end of the positioning shaft 18 is provided with a positioning groove 24, and the mounting block 16 is slidably arranged in the positioning groove 24, be equipped with the mounting hole on the location axle 18, push rod 19 slides and locates in the mounting hole, push rod 19 is the setting of T font structure, push rod 19 is located same vertical plane with cam 23, be equipped with solid fixed ring 25 on the location axle 18, reset spring 20 one end is located on push rod 19, the couple of the reset spring 20 other end slides and locates on solid fixed ring 25.
Wherein, the mounting hole is equipped with the multiunit, the multiunit the mounting hole is the equidistance and distributes to test the vascular support of different length. The rubber layer 26 is arranged on one surface, close to the intravascular stent, of the push rod 19, the surface, close to the intravascular stent, of the push rod 19 is arranged in an annular structure, the rubber layer 26 reduces the phenomenon of stress concentration in the expansion process of the intravascular stent, and the end face shape, in contact with the intravascular stent, of the push rod 19 corresponds to the shape of the intravascular stent, so that the intravascular stent is conveniently and better unfolded. The positioning shaft 18 is provided with three groups, the positioning shaft 18 is circumferentially and uniformly distributed by taking a rotating shaft of a driving shaft 21 as a center, the push rods 19 and the fixing devices 5 are correspondingly arranged with the positioning shaft 18, the push rods 19 are matched with the cam 23 on the same vertical plane, the cam 23 drives the push rods 19 to simultaneously prop open the intravascular stent in different directions, and the intravascular stent is prevented from displacing along the direction when being propped open in the same direction, and is simultaneously propped, so that the expansion of the intravascular stent is maximized. The first threaded holes are symmetrically provided with two groups about the central axis of the base 1, and the fixing screws 9 are arranged corresponding to the first threaded holes. The thread groups are provided with a plurality of groups which are distributed at equal intervals so as to facilitate the movement of the position of the cam 23. The transmission motor 10 is a forward and reverse rotation motor.
When the blood vessel stent test device is used specifically, the first supporting plate 6 is detached from the base 1, the cam 23 is debugged to an initial state, namely, the far rest point of the cam 23 is not contacted with the push rod 19, the position of the cam 23 is determined according to the diameter and the length of the blood vessel stent to be tested, the cam 23 is rotated to a corresponding position through threads, and then the two sides are locked by the fixing nuts 22; replacing a push rod 19 with corresponding length, fixing a reset spring 20 on the push rod 19 on a fixing ring 25, then sleeving the blood vessel support on three groups of positioning shafts 18, enabling one surface, close to the blood vessel support, of the push rod 19 to be tightly attached to the inner wall of the blood vessel support, sliding a first supporting plate 6 in a clamping sliding groove, fixing the first supporting plate 6 and a base 1 by using a fixing screw 9, clamping a mounting block 16 in a positioning groove 24 of the positioning shaft 18, enabling the positioning shaft 18 to be more stably mounted, avoiding the positioning shaft 18 from vibrating due to the movement of the push rod 19 to cause the positioning shaft 18 to be excessively worn due to the connection between second supporting plates 7, starting a transmission motor 10, driving the transmission motor 10 to drive a transmission screw rod 11 to rotate, driving a limiting plate 13 to move by the transmission screw rod 11, matching two groups of limiting plates 13 to limit the length of the blood vessel support, preventing the axial displacement of the blood vessel support, and starting a driving motor 2, the driving motor 2 drives the driving shaft 21 to rotate, the driving shaft 21 drives the cam 23 to rotate, then the cam 23 continues to rotate, when the near-resting point of the cam 23 is contacted with the push rod 19, the push rod 19 slides towards the axis of the driving shaft 21 under the action of the return spring 20, the intravascular stent recovers the initial state, and the actions are repeated until the intravascular stent is broken; the three groups of positioning shafts 18 are uniformly distributed in a circumferential manner by taking the rotating shaft as a center, namely when the push rod 19 is pushed by a far rest point of the cam 23, the three groups of cams 23 simultaneously push the push rod 19, and the three groups of push rods 19 simultaneously prop open the intravascular stent, so that the intravascular stent is prevented from displacing along one direction when the intravascular stent is propped open along the direction; meanwhile, when the near-resting point of the cam 23 is contacted with the push rods 19, the rubber layers 26 of the three push rods 19 are respectively propped against the inner wall of the intravascular stent, and the rubber layers 26 reduce the phenomenon of stress concentration in the expansion process of the intravascular stent, so that the intravascular stent is conveniently and better propped open.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a vascular support fatigue test device which characterized in that: the clamping device is arranged on the base, the supporting plates are arranged in the clamping chutes in a sliding mode, the limiting devices are arranged on the supporting plates, the supporting plates are symmetrically provided with two groups of limiting devices about a central axis of the base, the limiting devices are arranged corresponding to the supporting plates, the pushing device is arranged between the two groups of supporting plates, the two groups of supporting plates are respectively a first supporting plate and a second supporting plate, a fixing cavity with an opening in a side wall is formed in the first supporting plate, the fixing device is arranged in the fixing cavity, and the driving motor is arranged on the side wall of the second supporting plate; the side wall of the base is provided with a first threaded hole, a fixing screw is arranged in the first threaded hole, the side wall of the supporting plate is provided with a second threaded hole, and the base and the supporting plate are fastened and connected through the fixing screw; the limiting device comprises a transmission motor, a transmission screw, a guide shaft and a limiting disc, the transmission motor is arranged on the side wall of the first supporting plate, one end of the transmission screw is rotatably arranged on the side wall of the first supporting plate, the transmission screw is connected with an output shaft of the transmission motor, the guide shaft is arranged on the side wall of the first supporting plate, the transmission screw and the guide shaft are correspondingly arranged about the central axis of the first supporting plate, the limiting disc is arranged on the transmission screw in a threaded connection mode, the limiting disc is arranged on the guide shaft in a sliding mode, and a through hole is formed in the limiting disc; the fixing device comprises an elastic rod, a buffer spring and an installation block, wherein one end of the elastic rod is arranged on the side wall of the fixing cavity, the installation block is arranged at the other end of the elastic rod, the buffer spring is arranged on the elastic rod in a sliding manner, one end of the buffer spring is arranged on the side wall of the fixing cavity, and the other end of the buffer spring is arranged on the installation block; the pushing device comprises a positioning shaft, a push rod, a reset spring, a driving shaft, fixing nuts and a cam, wherein two ends of the driving shaft sequentially penetrate through two groups of through holes to be respectively and rotatably arranged on two groups of supporting plate side walls, one end of the driving shaft is connected with an output shaft of a driving motor, the driving shaft side walls are provided with thread groups, the cam is arranged on the driving shaft through threaded connection, the fixing nuts are arranged on the driving shaft through threaded connection, two groups of fixing nuts are arranged on the fixing nuts, the cam is slidably arranged between the two groups of fixing nuts, the cam is locked and connected with the driving shaft through the two groups of fixing nuts, one end of the positioning shaft sequentially penetrates through the two groups of through holes to be arranged on the second supporting plate side walls, the other end of the positioning shaft is provided with a positioning groove, the mounting block is slidably arranged in the positioning groove, the positioning shaft is provided with a mounting hole, the push rod is slidably arranged in the mounting hole, the push rod is the setting of T font structure, the push rod is located same vertical plane with the cam, the epaxial solid fixed ring that is equipped with of location, reset spring one end is located on the push rod, the couple of the reset spring other end slides and locates on solid fixed ring.
2. The fatigue testing device for the blood vessel stent according to claim 1, wherein: the mounting hole is equipped with the multiunit, the multiunit the mounting hole is the equidistance and distributes.
3. The fatigue testing device for the blood vessel stent according to claim 1, wherein: the rubber layer is arranged on one surface of the push rod, which is close to the intravascular stent, and the annular structure is arranged on one surface of the push rod, which is close to the intravascular stent.
4. The fatigue testing device for the blood vessel stent according to claim 1, wherein: the location axle is equipped with three groups, three groups the location axle uses the drive shaft axis of rotation to be circumference evenly distributed as the center, push rod and fixing device all correspond the setting with the location axle, three groups the push rod cooperates with the cam on same vertical plane.
5. The fatigue testing device for the blood vessel stent according to claim 1, wherein: the first threaded holes are symmetrically provided with two groups about a central axis of the base, and the fixing screws are arranged corresponding to the first threaded holes.
6. The fatigue testing device for the blood vessel stent according to claim 1, wherein: the thread groups are provided with a plurality of groups which are distributed at equal intervals.
7. The fatigue testing device for the blood vessel stent according to claim 1, wherein: the transmission motor is a forward and reverse rotation motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120402430.1U CN215767611U (en) | 2021-02-23 | 2021-02-23 | Intravascular stent fatigue test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120402430.1U CN215767611U (en) | 2021-02-23 | 2021-02-23 | Intravascular stent fatigue test device |
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| Publication Number | Publication Date |
|---|---|
| CN215767611U true CN215767611U (en) | 2022-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120402430.1U Active CN215767611U (en) | 2021-02-23 | 2021-02-23 | Intravascular stent fatigue test device |
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| Country | Link |
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| CN (1) | CN215767611U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114459715A (en) * | 2022-02-15 | 2022-05-10 | 上海锐淅医学科技有限公司 | Implant fatigue test vibration driving device and test equipment |
-
2021
- 2021-02-23 CN CN202120402430.1U patent/CN215767611U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114459715A (en) * | 2022-02-15 | 2022-05-10 | 上海锐淅医学科技有限公司 | Implant fatigue test vibration driving device and test equipment |
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