Pressing and holding device and valve pressing and holding method

Abstract

The invention provides a pressing and holding device and a valve pressing and holding method.The pressing and holding device comprises a rotating body and a base partially arranged in an inner cavity of the rotating body, a plurality of blades are arranged on the base, the rotating body and the base are movably connected, and the rotating body and the base can conduct relative linear motion in the central axis direction of the rotating body; the blades can linearly move in the radial direction of the base, the blades can be used for squeezing the valve to be pressed and held in the moving process, and the purpose of pressing and holding the valve can be achieved by means of squeezing of the blades to the valve in the moving process. By means of the mode, the pressing and holding device is simple in structure, convenient and fast to operate and high in practicability.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a compression gripper and a valve compression method. Background Art

[0002] In order to facilitate the delivery of implantable devices in the body, radial compression needs to be performed using a compression gripper before surgery to obtain a smaller size, and then it is implanted into the human body through blood vessels to achieve the purpose of curing diseases.

[0003] In the prior art, a patent document with the publication number CN217793488U relates to a compression gripper, which includes a compression mechanism and a limiting structure. The compression mechanism includes a plurality of compression plates and an operation assembly. The plurality of compression plates jointly enclose a compression hole; the rotation angle of the operation assembly is restricted by the limiting structure to prevent the operation assembly from driving the plurality of compression plates to continue moving after moving in place, resulting in an overly small compression hole, thereby effectively preventing the stent inserted into the compression hole from being overly compressed. Although the above prior arts can perform operations such as releasing or compressing corresponding components, due to their fixed structures, they can only perform corresponding operation steps on components of specific sizes; secondly, several structures are involved in the above solutions, and corresponding operations need to rely on the mutual cooperation between the structures, and the process is complex.

[0004] In view of this, it is necessary to design an improved compression gripper and a valve compression method to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a compression gripper and a valve compression method.

[0006] To achieve the above invention purpose, on the one hand, the present invention provides a compression gripper, including:

[0007] A rotating body, including a coaxial cylinder and a convex platform, the convex platform is connected to the cylinder, and along the central axis of the rotating body, the inner diameter of at least a part of the convex platform gradually decreases;

[0008] A base, a part of which is arranged in the inner cavity of the rotating body, the base is movably connected to the rotating body, and the base can perform a linear motion relative to the rotating body along the central axis direction of the rotating body;

[0009] A cavity for placing the valve to be compressed is formed inside the base. One end of the base close to the convex platform of the rotating body is provided with a plurality of blades, and all the blades enclose a channel for compressing the valve. The channel is connected to the cavity of the base and is coaxial with the base;

[0010] When the base moves linearly relative to the rotating body along the central axis direction of the rotating body, the convex platform abuts against each of the blades, driving each of the blades to move linearly along the radial direction of the base, so that the inner diameter of the channel gradually decreases.

[0011] Preferably, the outer sides of several of the blades away from the axis of the channel form a profiling structure adapted to the convex platform of the rotating body.

[0012] Preferably, a blade connecting portion is provided at one end of the base close to the blade. The blade connecting portion is provided with a circular through hole communicating with the inner cavity of the base, and the center of the circular through hole is located on the central axis of the base.

[0013] Preferably, a plurality of sliding grooves are uniformly provided at one end of the blade connecting portion close to the convex platform. The sliding grooves extend along the radial direction of the circular through hole, and the sliding grooves are used to connect the blade to the blade connecting portion.

[0014] Preferably, one of the blades includes a sliding block and a pressing member connected to the sliding block. The sliding block is adapted to the sliding groove; the pressing member includes a pressing block vertically provided on the sliding block. The pressing block includes a central portion, and a first side surface is provided on the central portion. The first side surfaces of the respective blades enclose the channel for pressing the valve.

[0015] Preferably, the pressing block further includes a plurality of first convex blocks and a plurality of second convex blocks. The first convex blocks and the second convex blocks are respectively arranged at intervals on both sides of the central portion, and each of the first convex blocks and the second convex blocks protrudes away from the central axis of the channel;

[0016] During the process of pressing the valve, along the central axis direction of the channel, the first convex block of one of the adjacent two blades intersects with the second convex block of the other blade;

[0017] When the valve pressing is completed, the first convex blocks or the second convex blocks on the same plane of all the pressing blocks together form a ring, and the plane where the ring is located is parallel to the plane where the circular through hole is located.

[0018] Preferably, a plurality of concave points and convex points are uniformly provided on the first side surface, and the convex points can contact the valve to be pressed.

[0019] Preferably, a plurality of reinforcing ribs are annularly provided on the inner wall of the base. The reinforcing ribs are strip-shaped protrusions extending from one end of the base to the other end and protruding from the inner surface of the base, and the strip-shaped protrusions form an acute angle with the central axis of the base, and the surface of the strip-shaped protrusion is smooth.

[0020] Preferably, a plurality of grooves are provided on the wall surface of the pressing block opposite to the first side surface. By providing the grooves, a concavo-convex structure is formed on the wall surface of the pressing block.

[0021] On the other hand, the present invention also provides a method for pressing a valve using the presser, including the following steps: placing the valve to be pressed in the inner cavity of the base, and pushing the valve along the central axis of the base towards the side close to the boss of the rotating body to pre-press the valve. At the same time, during the pre-pressing process, the valve enters the channel from the inner cavity of the base; making the base move linearly relative to the rotating body along the central axis direction of the rotating body, the boss abuts against each of the blades, driving all the blades on the base to move linearly in the radial direction of the base, so that the inner diameter of the channel gradually decreases, and using the blades to squeeze the valve to be pressed, and finally pressing the valve to the required size.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. The presser provided by the present invention includes a rotating body and a base partially disposed in the inner cavity of the rotating body. A plurality of blades are provided on the base, and the rotating body and the base are movably connected, and both can perform relative linear motion along the central axis direction of the rotating body. The blades can perform linear motion in the radial direction of the base. During the movement of the blades, they can exert extrusion on the valve to be pressed. By means of the extrusion of the blades on the valve during movement, the purpose of pressing the valve can be achieved. In the above process, by setting the rotating body to have a structure with a boss having a gradually decreasing inner diameter, a gradually shrinking space area can be formed in the inner cavity of the rotating body. When relative linear motion occurs between the rotating body and the base, the inner wall of the boss exerts extrusion on the blades, causing all the blades to approach each other. When the blades approach each other, they exert extrusion on the valve. Since the acting force of the inner wall of the boss on each blade is equal in magnitude, the pressing degree of each area of the valve is consistent during the pressing process, ensuring uniform pressing of the valve; by making the pressing block in the blades contact the valve, the force-bearing area of the valve during the pressing process is increased, effectively improving the valve pressing efficiency. At the same time, by providing convex points and concave points on the pressing block, not only the friction between the valve and the pressing block is increased, but also the convex points can provide a clamping force for the valve to prevent the valve from slipping during the pressing process; by providing reinforcing ribs in the inner cavity of the base and making the space size of the inner cavity of the base smaller at the end closer to the boss of the rotating body along its axis direction, the force of the reinforcing ribs on the valve can be utilized in this space to achieve pre-pressing. After pre-pressing, the blades are used for secondary pressing. The above method can not only make the pressing process more accurate and controllable, ensure the quality of the valve after pressing, but also effectively improve the working efficiency of valve pressing. In the above way, a presser with a simple structure, convenient operation and strong practicability is provided.

[0024] 2. The presser provided by the present invention is provided with a concavo-convex structure on the side surface of the presser block opposite to the first side surface, which can prevent the contact between the presser block and the rotating body from being too tight during the pressing process, resulting in the blade being stuck in the rotating body and affecting the smooth progress of the pressing work. By providing a retaining ring at one end of the rotating body away from the boss, it can prevent the rotating body from detaching from the base when the rotating body and the base move away from each other along the axial direction of the two. By providing a sliding block on the blade and a sliding groove for the sliding block to slide on the blade connecting part, the blade and the blade connecting part are connected in a movable connection manner. At the same time, under the restriction of the inner wall of the rotating body on the blade, the blade can only move along the radial direction of the base. By vertically arranging the presser block on the sliding block, the plane where the presser block is located can always be parallel to the central axis of the rotating body during the pressing process, thereby ensuring that during the pressing process, the overall structure for realizing pressing is always in contact with the valve, and realizing the pressing of the entire valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the presser provided by the present invention;

[0026] Figure 2 is a schematic structural diagram of the presser in Embodiment 1 of the present invention;

[0027] Figure 3 is Figure 2 a schematic diagram of the connection relationship between the base and the blade in;

[0028] Figure 4 is Figure 3 a schematic structural diagram after the base and the blade are installed in;

[0029] Figure 5 is Figure 4 a sectional view taken along line C-C in;

[0030] Figure 6 is Figure 3 a schematic structural diagram of the blade in;

[0031] The reference numerals are as follows:

[0032] 100, presser; 10, rotating body; 101, retaining ring; 20, base; 201, second thread; 21, reinforcing rib; 22, blade connecting part; 221, circular through hole; 222, sliding groove; 23, blade; 231, sliding block; 232, pressing member; 2321, central part; 2322, first convex block; 2323, second convex block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Here, it should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the solution of the present invention are shown in the drawings, while other details less relevant to the present invention are omitted.

[0035] In addition, it should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0036] The gripper 100 provided by the present invention includes a rotating body 10 and a base 20 partially disposed inside the rotating body 10. The rotating body 10 and the base 20 are coaxial, and both the base 20 and / or the rotating body 10 can perform relative linear motion along the central axis direction of the rotating body 10; at one end of the base 20 close to the rotating body 10, a plurality of blades 23 are provided. The blades 23 can perform linear motion along the radial direction of the base 20, and the blades 23 can generate extrusion force on the valve to be gripped during the process of gripping the valve. By using the extrusion force of the blades 23 on the valve during movement, the purpose of gripping the valve can be achieved.

[0037] Specifically, the rotating body 10 includes a coaxial cylinder and a boss, and the height of the cylinder is greater than the height of the boss. The inner diameter of at least a part of the boss gradually decreases along the central axis direction of the rotating body 10, forming a cavity with a gradually decreasing inner diameter inside the rotating body 10. The inner cavity of the rotating body 10 can not only accommodate a part of the base 20, but also facilitate the linear motion of the base 20 along the central axis direction of the rotating body 20; the rotating body 10 and the base 20 are movably connected, such as by screw connection, sliding connection, etc. The specific connection method is not limited here, as long as the linear motion of the base 20 along the central axis direction of the rotating body 20 can be achieved. In particular, in some embodiments, a retaining ring 101 is provided at one end of the rotating body 10 away from the boss, and its setting can prevent the rotating body 10 from detaching from the base 20 when the rotating body 10 and the base 20 move away from each other along their axis directions.

[0038] Further, a cavity for placing the valve to be pressed is formed inside the base 20. At one end of the base 20 near the boss of the rotating body 10, a plurality of blades 23 are provided. All the blades 23 enclose a channel for compressing the valve. The channel is communicated with the cavity of the base 20 and is coaxial with the base 20. The outer sides of all the blades 23 away from the axis of the channel form a profiling structure adapted to the boss of the rotating body 10. When the base 20 moves linearly relative to the rotating body 10 along the central axis direction of the rotating body 10, the inner wall of the boss abuts against the outer sides of the blades 23, driving each blade 23 to move linearly along the radial direction of the base 20, so that the inner diameter of the channel gradually decreases. In particular, a plurality of reinforcing ribs 21 are annularly arranged on the inner wall of the base 20. The reinforcing ribs 21 are strip-shaped protrusions protruding from one end of the base 20 to the other end, and the strip-shaped protrusions form an acute angle with the central axis of the base 20. To avoid damage to the valve caused by the reinforcing ribs 21 during the pressing process, the surface of the reinforcing ribs 21 is set to be a smooth surface. With such a setting, along the axial direction of the base 20 itself, the space size of the inner cavity of the base 20 gradually decreases. The gradually shrinking space can be used to pre-press the valve, and the pre-pressed valve is further pressed by the blades 23, effectively improving the pressing efficiency of the valve.

[0039] Furthermore, a blade connecting portion 22 is provided between the blade 23 and the base 20. The blade connecting portion 22 is used for installing the blade 23 on the base 20. A circular through hole 221 communicated with the inner cavity of the base 20 is provided in the middle of the blade connecting portion 22. The center of the circular through hole 221 is located on the central axis of the base 20. The circular through hole 221 can communicate the inner cavity of the base 20 with the inner cavity of the rotating body 10, so as to allow the valve from the inner cavity of the base 20 to pass through and enter the channel formed between the blades 23, and the blade 23 is used to press the valve. A plurality of slideways 222 are uniformly provided at one end of the blade connecting portion 22 near the boss. The slideways 222 extend along the radial direction of the circular through hole 221 and are used to connect the blade 23 with the blade connecting portion 22. The number of the slideways 222 is the same as the number of the blades 23.

[0040] Further, a blade 23 includes a sliding block 231 and a pressing member 232 disposed on the sliding block 231. The structure of the sliding block 231 is adapted to the structure of the slideway 222 so that the sliding block 231 and the slideway 222 are adapted to each other. The pressing member 232 is used to press the valve. The pressing member 232 includes a pressing block vertically disposed on the sliding block 231. The pressing block includes a central portion 2321, a first convex block 2322 and a second convex block 2323 respectively spaced on both sides of the central portion 2321. A first side surface is provided on the central portion 2321, and the first side surfaces of all the blades 23 together form a channel for pressing the valve. The first convex block 2322 and the second convex block 2323 both protrude away from the central axis of the channel. In some embodiments, the edges of the first convex block 2322 and the second convex block 2323 away from the channel are in a 1 / 2n circular arc structure, where n represents the number of blades, and n is a natural number greater than 2. For example, when n = 2, the first convex block 2322 and the second convex block 2323 are quarter-circular in the plane where the channel is located. Through the above settings, during the process of pressing the valve, along the central axis direction of the channel, the first convex block 2322 of one of the adjacent two blades 23 intersects with the second convex block 2323 of the other blade. At this time, the channel is in a "polygonal prism" shape. When the pressing of the valve is completed (when pressed to the limit), the first convex blocks 2322 or the second convex blocks 2323 on the same plane of all the compression blocks together form a ring, and the plane where the ring is located is parallel to the plane where the circular through-hole is located, that is, the channel forms a cylinder. The above process only describes the structure of one blade 23, and the structures of other blades are basically the same as the foregoing description, so they will not be elaborated here. Those skilled in the art should understand that the specific shapes of the pressing block and the first convex block 2322 and the second convex block 2323 provided thereon can also be set according to actual needs, as long as the valve pressing operation can be realized, and this is not limited herein, so it will not be elaborated further.

[0041] Specifically, a number of uniformly distributed concave points and convex points are further provided on the first side surface of the central portion 2321. During the pressing process, the convex points can contact the valve, while the concave points cannot contact the valve. With such a setting, the friction between the valve and the pressing block can be increased, avoiding slipping between the valve and the pressing block during the pressing process, and the valve can be pressed by using the acting force of the concave points on the valve, improving the working efficiency of pressing. Secondly, a number of grooves are provided on the side surface of the central portion 2321 opposite to its first side surface. The setting of the grooves forms a concave-convex structure on this side surface. With such a setting, it can be avoided that during the pressing process, the contact between the pressing block and the convex platform of the rotating body 10 is too tight, resulting in the blade being stuck in the convex platform of the rotating body 10 and being difficult to be pushed by the convex platform, affecting the smooth progress of the pressing work. It should be noted that the size of the pressing device proposed by the present invention can be selected according to actual needs, and each structure inside it can also be adjusted according to needs, and this is not limited herein.

[0042] On the other hand, the present invention also provides a method for compressing a valve using the above-mentioned compressor, and the specific process is as follows: Place the valve to be compressed in the inner cavity of the base 20, and carefully push the valve along the central axis of the base 20 towards the side of the boss of the rotating body 10. Utilize the squeezing effect of the reinforcing ribs 21 on the inner wall of the base 20 on the valve to pre-compress the valve. At the same time, during the pre-compression process, the valve enters the channel surrounded by all the blades from the inner cavity of the base 20 through the circular through-hole. At this time, the inner diameter of the channel is the largest; Make the base 20 move linearly along the central axis direction of the rotating body 10 towards the direction of the boss of the rotating body 10. During this process, the boss abuts against the outer sides of each blade away from the axis of the channel, driving all the blades 23 on the base 20 to move linearly along the radial direction of the base 20. During this process, along the central axis direction of the channel, the first protrusion 2322 of one of the two adjacent blades 23 intersects with the second protrusion 2323 of the other blade, and the inner diameter of the channel gradually decreases. Utilize the blades 23 to squeeze the valve to be compressed, and finally compress the valve to the required size.

[0043] The following further illustrates the compressor of the present invention with specific embodiments:

[0044] Embodiment 1

[0045] Please refer to Figures 1 to 6 As shown, this embodiment provides a compressor 100, which includes a rotating body 10 and a base 20 partially disposed inside the rotating body 10, and the two are connected in a threaded connection manner so that the base 20 can move linearly along the central axis direction of the rotating body 10. One end of the base 20 close to the boss of the rotating body 10 is provided with 3 blades 23. The outer sides of all the blades 23 away from the axis of the channel form a profiling structure adapted to the boss of the rotating body 10. The area in the middle of the 3 blades 23 forms a channel, and the blades 23 can move linearly along the radial direction of the base 20. During the process of all the blades 23 moving along the radial direction of the base 20, the adjacent blades 23 approach each other to compress the valve to be compressed. It should be noted that in some other embodiments, other connection methods can also be adopted between the rotating body 10 and the base 20, and this is not limited herein.

[0046] Specifically, please refer to Figure 1 and in combination with Figure 2As shown, the rotating body 10 is composed of a coaxial cylinder and a boss, and the height of the cylinder is greater than that of the boss. The inner diameter of the boss gradually decreases along the central axis direction of the rotating body 10, forming a cavity with a gradually decreasing inner diameter within the rotating body 10. The inner wall of the cylinder is provided with a first thread (not shown in the figure); a retaining ring 101 is provided at one end of the rotating body 10 away from the boss, and its setting can prevent the rotating body 10 from detaching from the base 20 when the rotating body 10 and the base 20 move away from each other along the axis direction of the two.

[0047] Furthermore, please refer to Figure 2 , and in combination with Figure 1 and Figure 3 As shown, all the blades 23 on the base 20 enclose a channel for compressing the valve, the channel is connected to the cavity of the base 20, and the channel is coaxial with the base 20. The outer sides of all the blades 23 away from the axis of the channel form a profiling structure adapted to the boss of the rotating body 10; when the base 20 moves linearly relative to the rotating body 10 along the central axis direction of the rotating body 10, the inner wall of the boss abuts against the outer sides of the respective blades, driving each blade to move linearly along the radial direction of the base 20, so that the inner diameter of the channel gradually decreases. Secondly, the outer wall of the base 20 is provided with a second thread 201 for cooperating with the first thread, and the connection between the base 20 and the rotating body 10 can be realized by using the thread connection between the first thread and the second thread 201; a plurality of reinforcing ribs 21 are annularly arranged on the inner wall of the base 20. The reinforcing ribs 21 are strip-shaped protrusions formed by extending and protruding from one end of the base 20 to the other end, and the strip-shaped protrusions form an acute angle with the central axis of the base 20. To avoid damage to the valve caused by the reinforcing ribs 21 during the pressing process, the surface of the reinforcing ribs 21 is set to be a smooth surface. With such a setting, the space size of the inner cavity of the base 20 gradually decreases along the side close to the rotating body 10, and the gradually shrinking space can be used to pre-press the valve, and the pre-pressed valve is further pressed by the blades 23, effectively improving the pressing efficiency of the valve.

[0048] Furthermore, a blade connecting portion 22 is further provided between the blade 23 and the base 20. The blade connecting portion 22 is used to mount the blade 23 to the base 20. A circular through hole 221 communicating with the inner cavity of the base 20 is provided in the middle of the blade connecting portion 22. The center of the circular through hole 221 is located on the central axis of the base 20. The circular through hole 221 allows the valve from the base 20 to pass through and enter the channel formed by the 3 blades 23, and the blade 23 is used to press the valve; three slideways 222 are evenly provided at one end of the blade connecting portion 22 close to the boss, and they extend along the radial direction of the circular through hole 221. The slideways 222 are slidably connected to the sliding blocks 231 on the blade 23. In this embodiment, the cross-section of the slideway 222 along the central axis direction of the rotating body 10 is in a "T" shape.

[0049] Furthermore, please refer toFigures 4 to 6 and in combination with Figures 2 to 3 As shown in Figures 2 to 3 , the blade 23 includes a sliding block 231 and a pressing member 232 provided on the sliding block 231. The sliding block 231 is adapted to the slideway 222, and the pressing member 232 is used to press the valve; specifically, the pressing member 232 includes a pressing block vertically provided on the sliding block 231. The pressing block includes a central portion 2321, a first convex block 2322 and a second convex block 2323 respectively arranged at intervals on both sides of the central portion 2321. A first side surface is provided on the central portion 2321, and the first side surfaces of all the blades 23 together enclose a channel for pressing the valve. The first convex block 2322 and the second convex block 2323 both protrude away from the central axis of the channel; during the process of compressing the valve, along the central axis direction of the channel, the first convex block 2322 of one of the adjacent two blades intersects with the second convex block 2323 of the other blade; when the compression of the valve ends (when the pressing reaches the limit), the first convex blocks 2322 or the second convex blocks 2323 on the same plane of all the compression blocks together form a ring. In particular, a number of evenly distributed concave points and convex points are also provided on the first side surface. During the pressing process, the convex points can contact the valve, while the concave points cannot contact the valve. With such a setting, the friction between the valve and the pressing block can be increased, and the valve can be prevented from slipping off the pressing block during the pressing process. It should be noted that in some other embodiments, the number of the blades 23 can also be 4 or 6 or other numbers, and the number of the slideways 222 can also be set to other numbers, which can be set as needed, and this is not limited herein.

[0050] In particular, in this embodiment, the above pressing device is used to press a valve with a diameter of 52±2 mm. The specific usage method is as follows: Place the valve to be pressed in the inner cavity of the base 20, and carefully push the valve along the central axis of the base 20 towards the convex platform side of the rotating body 10. Utilize the squeezing effect of the reinforcing ribs 21 on the inner wall of the base 20 on the valve to pre-press the valve. At the same time, during the pre-compression process, the valve enters the channel from the inner cavity of the base 20; Make the base 20 move linearly relative to the rotating body 10 along the central axis direction of the rotating body 10. During this process, the convex platform abuts against each blade 23, driving all the blades 23 on the base 20 to move linearly along the radial direction of the base 20, so that the inner diameter of the channel gradually decreases, and the blade 23 is used to squeeze the valve to be compressed. After the pressing ends, the diameter of the valve is about 8.04 mm.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A pressing gripper, characterized in that, Comprising: A rotating body, including a coaxial cylinder and a boss, the boss being connected to the cylinder, and along the central axis of the rotating body, the inner diameter of at least a part of the boss gradually decreasing; A base, a part of which is disposed in the inner cavity of the rotating body, the base being movably connected to the rotating body, and the base being capable of linearly moving relative to the rotating body along the central axis direction of the rotating body; A cavity for placing the valve to be pressed is formed inside the base. At one end of the base close to the boss of the rotating body, a plurality of blades are provided. All the blades enclose a channel for pressing the valve. The channel is communicated with the cavity of the base and is coaxial with the base; When the base linearly moves relative to the rotating body along the central axis direction of the rotating body, the boss abuts against each blade, driving each blade to linearly move along the radial direction of the base, so that the inner diameter of the channel gradually decreases.

2. The pinch grip according to claim 1, wherein, The outer sides of a plurality of the blades away from the axis of the channel form a profiling structure adapted to the boss of the rotating body.

3. The crimping device according to claim 2, characterized in that, At one end of the base close to the blades, a blade connecting portion is provided. The blade connecting portion is provided with a circular through hole communicated with the inner cavity of the base, and the center of the circular through hole is located on the central axis of the base.

4. The pinch gripper according to claim 3, characterized in that, At one end of the blade connecting portion close to the boss, a plurality of sliding grooves are evenly provided. The sliding grooves extend along the radial direction of the circular through hole, and the sliding grooves are used to connect the blades to the blade connecting portion.

5. The crimping device according to claim 4, wherein One of the blades includes a sliding block and a pressing member connected to the sliding block. The sliding block is adapted to the sliding groove; the pressing member includes a pressing block vertically provided on the sliding block. The pressing block includes a central portion, and a first side surface is provided on the central portion. The first side surfaces of all the blades enclose the channel for pressing the valve.

6. The pinch gripper according to claim 5, characterized in that The pressing block further includes a plurality of first protrusions and a plurality of second protrusions. The first protrusions and the second protrusions are respectively arranged at intervals on both sides of the central portion, and each of the first protrusions and the second protrusions protrudes away from the central axis of the channel; During the process of pressing the valve, along the central axis direction of the channel, the first protrusion of one of the adjacent two blades and the second protrusion of the other blade are staggered with each other; When the valve pressing is completed, the first protrusions or the second protrusions on the same plane of all the pressing blocks jointly form a ring, and the plane where the ring is located is parallel to the plane where the circular through hole is located.

7. The press gripper according to claim 5, characterized in that, A plurality of concave points and convex points are evenly provided on the first side surface, and the convex points can contact the valve to be pressed.

8. The pinch grip according to claim 2, characterized in that, A plurality of reinforcing ribs are annularly provided on the inner wall of the base. The reinforcing ribs are strip-shaped protrusions extending from one end of the base to the other end and protruding from the inner surface of the base, and the strip-shaped protrusions form an acute angle with the central axis of the base, and the surface of the strip-shaped protrusion is smooth.

9. The press gripper according to claim 5, wherein, A plurality of grooves are provided on the wall surface of the pressing block opposite to the first side surface. By providing the grooves, a concavo-convex structure is formed on the wall surface of the pressing block.

10. A method for compressing a valve, characterized in that, Using the press-gripper described in any one of claims 1-9, the method includes the following steps: placing the valve to be press-gripped in the inner cavity of the base, and pushing the valve along the central axis of the base towards the side close to the boss of the rotating body to pre-press-grip the valve. At the same time, during the pre-press-gripping process, the valve enters the channel from the inner cavity of the base; causing the base to perform a linear motion relative to the rotating body along the central axis direction of the rotating body, the boss abuts against each blade, driving all the blades on the base to perform a linear motion along the radial direction of the base, so that the inner diameter of the channel gradually decreases, and using the blades to squeeze the valve to be press-gripped, and finally press-gripping the valve to the required size.

Images