CN112781767A - Support pressing and holding device and adjusting method - Google Patents
Support pressing and holding device and adjusting method Download PDFInfo
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- CN112781767A CN112781767A CN202011635718.XA CN202011635718A CN112781767A CN 112781767 A CN112781767 A CN 112781767A CN 202011635718 A CN202011635718 A CN 202011635718A CN 112781767 A CN112781767 A CN 112781767A
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- adjusting
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- rotating ring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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Abstract
The invention discloses a support pressing and holding device, which comprises a control assembly, a plurality of adjusting assemblies arranged on the control assembly and a plurality of pressing and holding assemblies respectively connected with the corresponding adjusting assemblies.
Description
Technical Field
The invention relates to the technical field of radial supporting force testing, in particular to a support pressing and holding device and an adjusting method.
Background
The radial supporting force is an important index performance of the bracket medical appliance product. One of the great category of stent medical device products is a blood vessel stent, which is an inner stent placed in a lesion section on the basis of the expansion and the formation of a lumen balloon so as to achieve the purposes of supporting a stenotic occlusion section blood vessel, reducing the elastic retraction and the reshaping of the blood vessel and keeping the blood flow of the lumen unobstructed, and part of the inner stent also has the function of preventing restenosis, and is mainly divided into a coronary stent, a cerebrovascular stent, a renal artery stent, an aorta stent and the like, and the material of the inner stent can be stainless steel or nickel titanium and the like.
The technology needs the stent to support the pathological change position under the condition of not damaging tissues such as blood vessels and the like in vivo, and plays a role in treatment, so that the technology has higher requirements on the radial supporting force of the blood vessel stent and the supporting performance after being pressed and held. In the radial force test of the type of vessel stent products which can be crimped, a crimping device which can be compressed and restored uniformly in the axial direction is often used for realizing the test (as shown in figure 1), the pressing and holding device comprises a rotating ring 100, a clamping block 400, a pressing and holding block 200 and a first fixing column 210, wherein a plurality of pressing and holding blocks 200 are matched to form a pressing and holding area 500 (approximate to a circle), and the pressing and holding block 200 is driven to rotate by the two corresponding clamping blocks 400 on the rotating ring 100, thereby changing the radial size of the press holding area 500, and achieving the radial supporting force of the tested product by converting the force value of the rotation of the rotating ring 100, but the mechanism has a complex structure, particularly, the assembly precision of the clamping block 400 and the pressing and holding block 200 is extremely high, otherwise the device is easy to be blocked and the bracket can not be pressed and held, however, there is a difficulty in breaking through the manufacturing process, and therefore, how to reduce the assembly accuracy is one direction.
Disclosure of Invention
The invention aims to provide a bracket pressing and holding device and an adjusting method, so as to overcome the defects in the prior art.
In order to solve the technical problems, one technical scheme of the invention is as follows:
a support pressing and holding device comprises a control assembly, a plurality of adjusting assemblies arranged on the control assembly and a plurality of pressing and holding assemblies respectively connected with the corresponding adjusting assemblies;
the control assembly comprises a rotating ring;
the pressing and holding assembly comprises a pressing and holding block and a second push rod, and the second push rod is arranged at one end, close to the adjusting assembly, of the pressing and holding block;
the adjusting component comprises a fixed plate fixed on the rotating ring and a rotating rod arranged at an interval with the fixed plate, the rotating rod is rotatably connected with the rotating ring, one end of the rotating rod, which is far away from the rotating ring, is provided with a contact part, the fixed plate is provided with an adjusting rod, the adjusting rod is contacted with the rotating rod, and provides supporting force to make the contact part contact with the second push rod, the length of the adjusting rod is matched with the rotation angle of the pressing and holding blocks to make the adjacent surfaces of any two adjacent pressing and holding blocks parallel, the fixing plate with still be provided with elastic connecting piece between the second push rod, elastic connecting piece provides the locking force and makes the second push rod with the contact of conflict portion, and is a plurality of elastic connecting piece's tensile length with the length looks adaptation of regulating lever makes a plurality of the locking force that elastic connecting piece provided is the same.
In a preferred embodiment of the present invention, the squeezing blocks include a first end surface and a second end surface, the first end surface and the second end surface form a V-shaped included angle, and the V-shaped included angles of the plurality of squeezing blocks face the inside of the rotating ring.
In a preferred embodiment of the invention, a plurality of first fixing columns are arranged along the same circumference, and the pressing and holding block is rotatably connected with the first fixing columns.
In a preferred embodiment of the present invention, a plurality of second fixing columns are arranged along the same circumference, and the rotating ring is disposed in the circumference formed by the plurality of second fixing columns and is in contact with the second fixing columns.
In a preferred embodiment of the present invention, a first push rod is disposed on the rotating ring, such that pushing the first push rod rotates the rotating ring.
In a preferred embodiment of the present invention, the interference portion is a bearing, and an inner ring of the interference portion is connected to the rotating rod.
In a preferred embodiment of the present invention, the elastic connection member is a tension spring.
In a preferred embodiment of the present invention, the fixing plate, the second pushing rod and the first fixing column satisfy:
wherein D isnThe distance between one end of the fixing plate in the nth crimping assembly, which is far away from the rotating ring, and the corresponding second push rod in the nth adjusting assembly,
Lnthe distance between one end of the fixing plate in the nth crimping assembly, which is far away from the rotating ring, and the corresponding first fixing column in the nth adjusting assembly is obtained.
The other technical scheme of the invention is as follows:
a method for adjusting a bracket pressing and holding device adopts any one of the bracket pressing and holding devices and comprises the following steps:
s1, adjusting the plurality of the pressing and holding blocks to be evenly distributed along a circumference;
s2 disposing the rotating ring above the plurality of crimping blocks;
s3, adjusting the length of each adjusting rod, so that the fixed plate, the second pushing rod and the first fixing post satisfy the following conditions:
wherein D isnThe end of the fixing plate in the n-th press holding assembly far away from the rotating ring corresponds to the second push in the n-th adjusting assemblyThe distance between the rods is such that,
Lnthe distance between one end of the fixed plate in the nth crimping assembly, which is far away from the rotating ring, and the corresponding first fixed column in the nth adjusting assembly is set;
s4 elastic connectors are provided between the fixing plate and the second push rod, and the locking forces provided by the elastic connectors are the same.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention reduces the assembly precision of the support pressing and holding device through the arrangement of the adjusting assembly, can be compatible with lower processing precision, has better stability, and further reduces the research and development cost.
(2) The invention adjusts the size of the original pressing and holding area through the adjusting component, thereby being capable of pressing and holding different specifications of different types of vascular stents, basically having no clearance when the pressing and holding block runs bidirectionally, and being used for testing radial force with higher precision requirement.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a crimping device in the prior art;
FIG. 2 is a simplified schematic diagram of the present invention;
FIG. 3 is a simplified schematic diagram of the present invention after rotating an angle;
FIG. 4 is a partially enlarged schematic view of the present invention;
fig. 5 is a rear view of fig. 4.
Specifically, 100, a rotating ring; 110. a second fixed column; 120. a first push rod;
200. pressing the holding block; 201. a first end face; 202. a second end face; 203. a V-shaped included angle; 210. a first fixed column; 220. a second push rod;
300. a fixing plate; 310. adjusting a rod; 320. rotating the rod; 321. a third fixing column; 330. a contact part;
400. a clamping block; 500. the grip area is pressed.
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.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
As shown in figure 2, the stent crimping device comprises a control component, a plurality of adjusting components arranged on the control component and a plurality of crimping components connected with the corresponding adjusting components respectively, axial movement can be converted into radial contraction and expansion movement, so that the vascular stent can be crimped to any size, the assembly precision of the stent crimping device is reduced through the arrangement of the adjusting components, the stent crimping device can be compatible with low machining precision, and has good stability, and the research and development cost is reduced.
Specifically, as shown in fig. 2 and 3, the control assembly includes a rotating ring 100. Preferably, a plurality of the second fixing posts 110 are arranged along the same circumference, and the rotating ring 100 is disposed within the circumference formed by the plurality of the second fixing posts 110 and is in contact with the second fixing posts 110, so that the rotating ring 100 is stably rotated within a fixed range. The number of the second fixing posts is not less than three in order to secure the stability of the rotating ring 100. Preferably, a bearing is disposed on the second fixing post 110, and an outer ring of the bearing is in contact with the rotating ring 100, so that rolling friction between the two is realized, and the influence of friction force on the rotation of the rotating ring 100 is reduced. It is understood that the plurality of bearings are fixed to a fixed reference surface so that the rotary ring 100 can make a rotational movement at the centers of the plurality of bearings when the rotary ring 100 makes a swing movement. The rotating ring 100 is preferably provided with a first push rod 120, so that pushing the first push rod 120 rotates the rotating ring 100, and the first push rod 120 can be pushed manually or can be connected to a motor module and driven by a motor. When the motor module is adopted for pushing, a sensor can be added in the connection between the first push rod 120 of the rotating ring 100 and the motor die, so that the pushing force value can be monitored in real time.
The pressing and holding assembly comprises a pressing and holding block 200 and a second push rod 220, wherein the second push rod 220 is arranged at one end, close to the adjusting assembly, of the pressing and holding block 200, so that the second push rod 220 is conveniently abutted through the adjusting assembly, and the pressing and holding block 200 is driven to rotate to a proper angle. The number of the crimping blocks 200 is not less than three in order to form the crimping region 500. Preferably, the crimping blocks 200 comprise a first end face 201 and a second end face 202, the first end face 201 and the second end face 202 form a V-shaped included angle 203, the V-shaped included angles 203 of the plurality of crimping blocks 200 face the inside of the rotating ring 100, so that after rotation, the plurality of crimping blocks 200 form a crimping area 500, and finally, the first end face 201 of a crimping block 200 can be in contact with the second end face 202 of an adjacent crimping block 200. It is understood that the number of the crimping blocks 200 is not limited to the illustration, and as the number of the crimping blocks 200 increases, the crimping region 500 gradually tends to be rounded, thereby enabling the stent to be uniformly crimped and better simulating the cross-sectional shape of the blood vessel of the human body.
Preferably, a plurality of first fixing posts 210 are arranged along the same circumference, and the pressing and holding block 200 is rotatably connected with the first fixing posts 210, so that the adjusting assembly pushes the pressing and holding block 200 to rotate within a certain area. The first fixing column is preferably fixed inside the rotating shaft, so that the first fixing column can rotate.
As shown in fig. 4 and 5, the adjusting assembly includes a fixed plate 300 fixed to the rotating ring 100 and a rotating lever 320 provided to be spaced apart from the fixed plate 300, and the rotating lever 320 is rotatably coupled to the rotating ring 100. An end of the rotating lever 320 remote from the rotating ring 100 is provided with an interference part 330. Preferably, the interference part 330 is a bearing, and an inner ring of the interference part 330 is connected with the rotation rod 320. Be provided with on the fixed plate 300 and adjust pole 310, adjust pole 310 and the contact of dwang 320 to provide the holding power and make conflict portion 330 and second push rod 220 contact, conflict portion 330 includes swing joint's inner and outer ring promptly, and the inner ring is connected with dwang 320, and the outer ring contacts with second push rod 220, thereby makes to rotate the in-process between the two for rolling friction, reduces because of frictional force to pressing and holding piece 200 rotates the influence that comes. The adjustment lever 310 may employ a screw. The length of the adjusting rod 310 is matched with the rotation angle of the pressing and holding block 200, so that the adjacent surfaces of any two adjacent pressing and holding blocks 200 are parallel, that is, the length of the adjusting rod 310 is adjusted to enable the abutting part 330 to abut against and push the pressing and holding block 200 to deflect by a proper angle, and the adjacent surfaces of any two adjacent pressing and holding blocks 200 are parallel, so that the adjacent two pressing and holding blocks 200 are prevented from abutting and being clamped in the pressing and holding operation rotation process of the pressing and holding block 200, the yield is improved, and the processing and manufacturing cost is reduced. More preferably, the length of the adjusting rod 310 is adapted to the rotation angle of the two crimping blocks 200, so that the adjacent surfaces of any two adjacent crimping blocks 200 are parallel and equidistant, thereby ensuring that the rotation conditions of any two adjacent crimping blocks 200 are consistent after rotation, and the formed crimping area 500 is a regular polygon, more approximate to a circle.
An elastic connector is further disposed between the fixing plate 300 and the second push rod 220, and the elastic connector provides a locking force to enable the second push rod 220 to contact the abutting portion 330, so that, on one hand, a gap between the second push rod 220 and the abutting portion 330 is eliminated, and on the other hand, when the second push rod rotates in the opposite direction, the rotating ring 100 rotates to drive the pressing and holding block 200 to rotate, so that the radius of the pressing and holding area 500 is reduced. The stretching length of the elastic connecting pieces is matched with the length of the adjusting rod 310, so that the locking force provided by the elastic connecting pieces is the same, namely, each pressure holding block 200 is ensured to be subjected to the same pulling force, and the pressure holding blocks 200 are prevented from being locked when rotating reversely. The resilient coupling is preferably a tension spring.
Preferably, as shown in figure 4,
wherein D isnIs the distance between one end of the stationary plate 300 in the nth crimping assembly, which is away from the rotating ring 100, and the second push rod 220 in the corresponding nth adjusting assembly, LnThe distance between one end of the fixing plate 300 in the nth crimping assembly far away from the rotating ring 100 and the first fixing column 210 in the corresponding nth adjusting assembly。
K is a preset adjustment precision coefficient, when the adjusting rod 310 is adjusted, the adjusting rod 310 rotates and extends for the same distance, and the larger the value of K is, the smaller the rotation amplitude of the pressing and holding block 200 is; the smaller the n value, the smaller the value of K, and the larger the n value, the larger the value of K; and the greater the length of the second push rod 220, the smaller the value of K;
when the value of K is greater than 0.1, the corresponding press-holding block 200 cannot be parallel to the adjacent side edge of the adjacent press-holding block 200 as the adjusting rod 310 is adjusted to the maximum length; when the value of K is less than 0.01, the corresponding crimping block 200 abuts against the adjacent crimping block 200 when the adjusting rod 310 is at the minimum adjustable length, so that the desired crimping region 500 cannot be formed.
A method for adjusting a bracket pressing and holding device adopts any one of the bracket pressing and holding devices and comprises the following steps:
s1, adjusting the plurality of the pressing and holding blocks 200 to be evenly distributed along a circumference;
s2 setting the rotating ring 100 above the plurality of crimping blocks 200;
s3 adjusting the length of each adjustment lever 310 such that
Wherein D isnThe distance between one end of the stationary plate 300 in the nth crimping assembly away from the rotating ring 100 and the second push rod 220 in the corresponding nth adjusting assembly,
Lnis the distance between one end of the fixing plate 300 in the nth crimping assembly, which is far away from the rotating ring 100, and the first fixing post 210 in the corresponding nth adjusting assembly.
S4 elastic connectors are provided between the fixing plate and the second push rod, and the locking forces provided by the elastic connectors are the same.
In conclusion, the assembly precision of the support pressing and holding device is reduced through the arrangement of the adjusting assembly, the support pressing and holding device is compatible with lower machining precision and has better stability, so that the research and development cost is reduced, specifically, the pressing and holding blocks deflect to proper angles through the adjustment of the length of the adjusting rod, the clamping of a plurality of pressing and holding blocks during rotation is avoided, and meanwhile, each pressing and holding block is subjected to the same locking force through the adjustment of the elastic connecting piece, and the clamping of the pressing and holding blocks during reverse rotation is avoided.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. A support pressing and holding device is characterized by comprising a control assembly, a plurality of adjusting assemblies arranged on the control assembly and a plurality of pressing and holding assemblies respectively connected with the adjusting assemblies;
the control assembly comprises a rotating ring;
the pressing and holding assembly comprises a pressing and holding block and a second push rod, and the second push rod is arranged at one end, close to the adjusting assembly, of the pressing and holding block;
the adjusting component comprises a fixed plate fixed on the rotating ring and a rotating rod arranged at an interval with the fixed plate, the rotating rod is rotatably connected with the rotating ring, one end of the rotating rod, which is far away from the rotating ring, is provided with a contact part, the fixed plate is provided with an adjusting rod, the adjusting rod is contacted with the rotating rod, and provides supporting force to make the contact part contact with the second push rod, the length of the adjusting rod is matched with the rotation angle of the pressing and holding blocks to make the adjacent surfaces of any two adjacent pressing and holding blocks parallel, the fixing plate with still be provided with elastic connecting piece between the second push rod, elastic connecting piece provides the locking force and makes the second push rod with the contact of conflict portion, and is a plurality of elastic connecting piece's tensile length with the length looks adaptation of regulating lever makes a plurality of the locking force that elastic connecting piece provided is the same.
2. The stent crimping device of claim 1, wherein the crimping blocks comprise a first end face and a second end face, the first end face and the second end face forming a V-shaped included angle, the V-shaped included angle of a plurality of the crimping blocks facing an interior of the rotating ring.
3. The stent crimping device according to claim 1, wherein a plurality of first fixing columns are arranged along the same circumference, and the crimping block is rotatably connected with the first fixing columns.
4. The stent crimping device of claim 1, wherein a plurality of second fixing posts are arranged along a same circumference, and the rotating ring is disposed within a circumference formed by the plurality of second fixing posts and is in contact with the second fixing posts.
5. The stent crimping device of claim 1, wherein a first push rod is disposed on the rotating ring such that pushing the first push rod rotates the rotating ring.
6. The stent crimping device of claim 1, wherein the interference portion is a bearing, and an inner ring of the interference portion is connected with the rotating rod.
7. The stent crimping device of claim 1, wherein the resilient connecting member is a tension spring.
8. The bracket pressing and holding device according to claim 3, wherein the fixing plate, the second push rod and the first fixing column satisfy:
wherein D isnThe distance between one end of the fixing plate in the nth crimping assembly, which is far away from the rotating ring, and the corresponding second push rod in the nth adjusting assembly,
Lnthe distance between one end of the fixing plate in the nth crimping assembly, which is far away from the rotating ring, and the corresponding first fixing column in the nth adjusting assembly is obtained.
9. A method for adjusting a stent crimping device, characterized by using the stent crimping device according to any one of claims 1 to 8, and comprising the steps of:
s1, adjusting the plurality of the pressing and holding blocks to be evenly distributed along a circumference;
s2 disposing the rotating ring above the plurality of crimping blocks;
s3, adjusting the length of each adjusting rod, so that the fixed plate, the second pushing rod and the first fixing post satisfy the following conditions:
wherein D isnThe distance between one end of the fixing plate in the nth crimping assembly, which is far away from the rotating ring, and the corresponding second push rod in the nth adjusting assembly,
Lnthe fixing plate in the nth press holding component is far away from theThe distance between one end of the rotating ring and the corresponding first fixed column in the nth adjusting assembly;
s4 elastic connectors are provided between the fixing plate and the second push rod, and the locking forces provided by the elastic connectors are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011635718.XA CN112781767A (en) | 2020-12-31 | 2020-12-31 | Support pressing and holding device and adjusting method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011635718.XA CN112781767A (en) | 2020-12-31 | 2020-12-31 | Support pressing and holding device and adjusting method |
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| CN112781767A true CN112781767A (en) | 2021-05-11 |
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| CN202011635718.XA Pending CN112781767A (en) | 2020-12-31 | 2020-12-31 | Support pressing and holding device and adjusting method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114054584A (en) * | 2021-11-04 | 2022-02-18 | 武汉奥绿新生物科技股份有限公司 | Quick-change tubular part pressing and holding mechanism |
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2020
- 2020-12-31 CN CN202011635718.XA patent/CN112781767A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114054584A (en) * | 2021-11-04 | 2022-02-18 | 武汉奥绿新生物科技股份有限公司 | Quick-change tubular part pressing and holding mechanism |
| CN114054584B (en) * | 2021-11-04 | 2024-03-15 | 武汉奥绿新生物科技股份有限公司 | Quick-change tubular part pressing and holding mechanism |
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