assembly device

Abstract

The application relates to an assembling device. An intervention pump comprises a motor, an impeller fixedly connected with the motor, and a cannula capable of being connected with the motor and capable of containing at least part of the impeller. The assembling device comprises a first clamping mechanism and a second clamping mechanism. The first clamping mechanism has a first clamping cavity capable of containing at least part of the motor. The cavity wall of the first clamping cavity is capable of clamping the motor. The size of the first clamping cavity is adjustable. The second clamping mechanism comprises a mounting base and a plurality of clamping members arranged on the mounting base. The plurality of clamping members are arranged at intervals along a circumference to form a second clamping cavity. The plurality of clamping members are capable of jointly clamping the cannula. Each clamping member is capable of moving relative to the mounting base, so that the size of the second clamping cavity is adjustable, and the relative position of the cannula and the impeller is adjustable. Therefore, the assembling device can assemble intervention pumps with different radial sizes, has universality, and can reduce the assembly cost of intervention pumps with different radial sizes.

Description

Technical Field

[0001] This application relates to the field of interventional pump technology, and in particular to an assembly device. Background Technology

[0002] An interventional pump is a mechanical device that extends into the heart through a blood vessel to assist the heart in pumping blood. Currently, the assembly process of interventional pumps usually requires coaxial assembly using assembly tooling; however, the current assembly tooling is not compatible with the assembly of interventional pumps of different sizes, which means that different sizes of interventional pumps need to be equipped with different assembly tooling for coaxial assembly, resulting in higher production costs for interventional pumps. Summary of the Invention

[0003] Based on this, this application provides a more versatile assembly device that is suitable for assembling various intervention pumps with different radial dimensions.

[0004] This application provides an assembly device for assembling an interventional pump, the interventional pump including a motor, an impeller fixedly connected to the motor, and a tubing capable of being connected to the motor, the tubing being able to accommodate at least a portion of the impeller, the assembly device comprising:

[0005] The first clamping mechanism has a first clamping cavity, which can accommodate at least part of the motor, and the cavity wall of the first clamping cavity can clamp the motor. The size of the first clamping cavity is adjustable.

[0006] The second clamping mechanism includes a mounting base and a plurality of clamping members disposed on the mounting base. The plurality of clamping members are spaced apart along a circumference to form a second clamping cavity. The plurality of clamping members can jointly clamp the insertion tube. Each clamping member can move relative to the mounting base so that the size of the second clamping cavity is adjustable and the relative position of the insertion tube and the impeller is adjustable.

[0007] In one optional embodiment, the first clamping mechanism includes a base and a plurality of pressure caps, the base being selectively and detachably connected to one of the plurality of pressure caps; each pressure cap has a first groove, and when the pressure cap is connected to the base, the first groove and the base together form the first clamping cavity, and at least a portion of the first grooves of the plurality of pressure caps have different sizes so that the size of the first clamping cavity is adjustable.

[0008] In one optional embodiment, the base has a mounting surface and a second groove, the second groove having a first opening located on the mounting surface. When the pressure cap is connected to the base, the pressure cap is mounted on the mounting surface. The position of the second groove corresponds to the position of the first groove, so that the first groove and the second groove together form the first clamping cavity. The second groove has a first groove wall surface and a second groove wall surface opposite to the first groove wall surface. At least one of the first groove wall surface and the second groove wall surface is inclined relative to the mounting surface, and the distance between the first groove wall surface and the second groove wall surface gradually decreases along a direction perpendicular to the mounting surface and pointing from the mounting surface into the base.

[0009] In one optional embodiment, the assembly device further has at least one of the following features: both the first groove wall surface and the second groove wall surface are inclined relative to the mounting surface;

[0010] The distance from the side of the first groove wall closest to the mounting surface to the mounting surface is equal to the distance from the side of the second groove wall closest to the mounting surface to the mounting surface.

[0011] The angle between the first groove wall and the mounting surface is equal to the angle between the second groove wall and the mounting surface;

[0012] The angle between the first groove wall and the mounting surface is 30°~60°, and the angle between the second groove wall and the mounting surface is 30°~60°.

[0013] The second groove also has a second opening opposite to the first opening, and a stress relief groove is also provided on the base. The stress relief groove communicates with the second opening, and the stress relief groove and the second groove are arranged in a direction perpendicular to the mounting surface.

[0014] In one alternative embodiment, the groove wall of the first groove is arc-shaped.

[0015] In one optional embodiment, the base is further provided with a stress relief groove, the stress relief groove including a third groove wall and a fourth groove wall, the third groove wall being connected to the side of the first groove wall away from the mounting surface, the fourth groove wall being connected to the side of the second groove wall away from the mounting surface, and the distance between the third groove wall and the fourth groove wall being greater than or equal to the minimum distance between the first groove wall and the second groove wall.

[0016] In one optional embodiment, the pressure cap has a top surface, a bottom surface, and a side surface connected to the top surface and the bottom surface. The pressure cap is provided with a first through hole and a second through hole, both of which penetrate the top surface and the bottom surface. The second through hole also has a notch located on the side surface.

[0017] The first clamping mechanism further includes a first connector and a second connector; the first connector can pass through the first through hole and be detachably connected to the base, and the second connector can pass through the second through hole and be detachably connected to the base, thereby locking the pressure cap onto the base;

[0018] The second connector includes a rod and a cap connected to the rod. The rod can pass through the second through hole and is detachably connected to the base. The cap presses against the top surface of the cover, thereby clamping the cover between the cap and the base.

[0019] When the width of the rod is less than the width of the notch, and the cap is not pressed against the top surface of the cover, the cover can rotate around the first connector, and the second connector can be dislodged from the cover through the notch.

[0020] In one optional embodiment, the first connector includes a head, a smooth rod segment, and a threaded rod segment connected in sequence. The base is provided with a first threaded hole. The smooth rod segment can pass through the first through hole. The threaded rod segment can be threadedly connected to the base. The head can press against the top surface of the cover, so that the cover is clamped between the head and the base.

[0021] And / or, the rod portion can be threadedly connected to the base.

[0022] In one alternative embodiment, the mounting base has an annular portion with a columnar hole, and a portion of each of the clamping members is located within the columnar hole to form a second clamping cavity within the columnar hole, wherein the second clamping cavity and the first clamping cavity are spaced apart and opposite to each other along the central axis of the annular portion.

[0023] In one optional embodiment, the mounting base has an annular portion and a plurality of fixed shafts. The annular portion has a columnar hole and a plurality of through holes spaced circumferentially along the annular portion. Each fixed shaft is fixedly inserted through one of the through holes. Each fixed shaft has a through hole extending radially along the annular portion. The number of fixed shafts is equal to the number of clamping members. Each clamping member is inserted through the through hole of one of the fixed shafts, such that a portion of each clamping member is located within the columnar hole. The portions of the plurality of clamping members located within the columnar holes together form a second clamping cavity. Each clamping member is capable of radial movement along the annular portion, so that the size of the second clamping cavity is adjustable.

[0024] In one optional embodiment, the through hole has a first hole section and a second hole section, the first hole section and the second hole section are connected, and the hole wall of the first hole section is provided with threads;

[0025] Each of the clamping members includes an adjusting member and a supporting member. A portion of the adjusting member is received in the first hole segment and threadedly engaged with the hole wall of the first hole segment. A portion of the supporting member is received in the second hole segment and is slidable along the second hole segment. One end of the supporting member abuts against the adjusting member, and the other end is located inside the cylindrical hole. The portions of the supporting members of the plurality of clamping members located inside the cylindrical holes together form the second clamping cavity. The adjusting member can be pushed against the supporting member and slid towards the cylindrical hole by threading its engagement with the hole wall of the first hole segment.

[0026] In one optional embodiment, the abutting member includes a rod body and abutting ends; one end of the rod body is fixedly connected to the abutting end, and the other end abuts against the adjusting member; at least a portion of the rod body is located in the second hole section, and a plurality of abutting ends are located within the columnar hole to jointly enclose and form the second clamping cavity, wherein:

[0027] The abutting end is a flexible component; and / or, the end face of the abutting end away from the rod is configured as an arc surface capable of conforming to the outer peripheral surface of the insertion tube.

[0028] In one optional embodiment, the rod body has a first limiting plane, and the hole wall of the second hole segment is provided with a second limiting plane opposite to the first limiting plane. The second limiting plane slides against the first limiting plane to restrict the rotation of the rod body relative to the fixed shaft.

[0029] In one optional embodiment, there are multiple first limiting planes, and the rod has a prism segment, with multiple sides of the prism segment serving as the first limiting planes.

[0030] The second hole segment is a prism hole, and the inner wall of the second hole segment has a plurality of second limiting planes surrounding the central axis of the second hole segment; the number of the second limiting planes is equal to the number of the first limiting planes and corresponds one-to-one;

[0031] Wherein, a chamfer structure is provided between two adjacent first limiting planes; and / or, an avoidance groove is provided between two adjacent second limiting planes.

[0032] In one optional embodiment, the first clamping mechanism is provided with a guide groove that extends along the central axis of the annular portion; the mounting base is slidably disposed in the guide groove.

[0033] In one optional embodiment, the second clamping mechanism further includes a transmission assembly comprising a rack and a gear. The rack is fixed to the mounting base, and the gear is rotatably connected to the first clamping mechanism. The gear is capable of meshing with the rack, wherein when the gear rotates relative to the first clamping mechanism, it can drive the rack to move in a direction parallel to the central axis of the annular portion.

[0034] Because the size of the first clamping cavity in the first clamping mechanism is adjustable, it can accommodate motors with different radial dimensions. Simultaneously, multiple clamping components in the second clamping mechanism are spaced apart circumferentially and can move relative to the mounting base, allowing the size of the second clamping cavity to also be adjusted. This enables the clamping of cannulas with different radial dimensions. Therefore, this assembly device is versatile and compatible with various radial-sized interventional pump assemblies, eliminating the need for dedicated assembly fixtures for each radial-sized pump assembly, thus reducing assembly costs. Specifically, by having multiple clamping components spaced apart circumferentially to jointly clamp the cannulas, and each component being movable relative to the mounting base, not only can the cannulas be centered and clamped through coordinated action, but the axial position of the cannulas can also be adjusted more precisely, thereby accurately controlling the relative position between the cannulas and the impeller. For example, the central axis of the cannulas can be aligned with the central axis of the impeller to achieve precise assembly of the interventional pump. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural diagram of an interventional pump according to an embodiment of this application.

[0036] Figure 2 This is an exploded structural diagram of an interventional pump according to an embodiment of this application.

[0037] Figure 3 This is a cross-sectional view of an interventional pump according to an embodiment of this application.

[0038] Figure 4 This is a three-dimensional structural diagram of an assembly device for clamping an interventional pump according to an embodiment of this application.

[0039] Figure 5 This is an exploded structural diagram of an assembly device according to an embodiment of this application.

[0040] Figure 6 This is a front view of an assembly apparatus according to an embodiment of this application.

[0041] Figure 7 for Figure 4 A cross-sectional view of the assembly device along the X direction.

[0042] Figure 8 This is a front view of the base according to an embodiment of this application.

[0043] Figure 9 This is a three-dimensional structural diagram of a cover according to an embodiment of this application.

[0044] Figure 10 This is a partially exploded view of the structure of the second clamping mechanism according to an embodiment of this application.

[0045] Figure 11 This is a schematic diagram of the clamping member and the fixed shaft according to an embodiment of this application.

[0046] Figure 12 This is a cross-sectional view of a clamping member passing through a fixed axis according to an embodiment of this application.

[0047] Figure 13 The images show a left view and a front view of a clamping member passing through a fixed axis, according to an embodiment of this application.

[0048] Figure 14 for Figure 4 A cross-sectional view of the assembly device along line AA.

[0049] Figure 15 This is a partial structural schematic diagram of the second clamping mechanism according to another embodiment of this application.

[0050] Figure 16 This is a schematic diagram of the assembly process of an interventional pump according to an embodiment of this application.

[0051] Icon labels:

[0052] 100. Assembly equipment;

[0053] 10. First clamping mechanism; 10a. First clamping cavity; 11. Base; 111. Mounting surface; 112. Assembly surface; 113. Peripheral surface; 11a. Second groove; 111a. First opening; 111b. Second opening; 1101. First groove wall; 1102. Second groove wall; 11b. Stress relief groove; 1103. Third groove wall; 1104. Fourth groove wall; 1105. Groove bottom; 11c. Guide groove; 12. Pressure cap; 12a. First groove; 121. Top surface; 122. Bottom surface; 123. Side surface; 12b. First through hole; 12c. Second through hole; 12d. Notch; 13. First connector; 13a. Head; 13b. Smooth rod section; 13c. Threaded rod section; 14. Second connector; 14a. Rod part; 14b. Cap part;

[0054] 20. Second clamping mechanism; 20a. Second clamping cavity; 21. Mounting base; 210. Annular portion; 210a. Columnar hole; 210b. Through hole; 210c. Locking hole; 211. Fixed shaft; 212. Through hole; 212a. First hole section; 212b. Second hole section; 2121. Second limiting plane; 2122. Clearance groove; 213. Locking element; 214. Sliding portion; 2140. Threaded hole 22. Clamping component; 221. Adjusting component; 222. Supporting component; 2221. Rod body; 2201. Prismatic segment; 2222. Supporting end; 222a. End face; 222b. First limiting plane; 222c. Chamfered structure; 24. Transmission assembly; 241. Rack; 242. Gear; 243. Rotating handle; 244. Connecting component; 25. Fastener; 251. Threaded rod; 252. Nut;

[0055] 200. Pump; 201. Motor; 202. Impeller; 203. Tubing; 201a. Shaft; 201b. Housing; 201c. Drive assembly;

[0056] X, the first straight line direction; Y, the second straight line direction. Detailed Implementation

[0057] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0058] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0059] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0061] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0063] See Figures 1-3 The interventional pump 200 includes a motor 201, an impeller 202, and a tubing 203. The impeller 202 is fixedly connected to the motor 201, and the tubing 203 is connected to the motor 201, and the tubing 203 can accommodate at least a portion of the impeller 202. Specifically, the tubing 203 is generally cylindrical. The motor 201 has a rotating shaft 201a, a housing 201b, and a drive assembly 201c. The drive assembly 201c is located inside the housing 201b, and the rotating shaft 201a is partially located inside and partially located outside the housing 201b. The drive assembly 201c is driveably connected to the rotating shaft 201a and can drive the rotating shaft 201a to rotate. The impeller 202 is connected to the rotating shaft 201a and can rotate with the rotating shaft 201a. A portion of the tubing 203 is fitted onto the housing 201b and fixedly connected to the housing 201b. The insertion tube 203 and the motor 201 can be connected by means of bonding or welding. Specifically, the insertion tube 203 and the outer shell 201b are connected by means of bonding or welding.

[0064] The outer casing 201b is roughly cylindrical. Typically, the central axis of the outer casing 201b is the same as the central axis of the motor 201. The central axes of the motor 201, the shaft 201a, and the impeller 202 coincide. The central axis of the impeller 202 is also its axis of rotation. The radial dimension of the motor 201 refers to the radial dimension of the outer casing 201b, that is, the dimension of the outer casing 201b perpendicular to its central axis.

[0065] To prevent the impeller 202 from contacting the insertion tube 203 when it rotates, there needs to be a certain gap between the insertion tube 203 and the impeller 202, and the central axis of the insertion tube 203 should coincide with the central axis of the impeller 202.

[0066] Currently, the interventional pump 200 typically requires assembly using a tooling fixture to ensure that the central axis of the cannula 203 coincides with the central axis of the impeller 202. However, to accommodate patients with different vessel diameters, meet varying blood flow support needs, and adapt to different support durations, manufacturers have designed several different sizes of interventional pumps 200. However, current assembly fixtures are not compatible with assembling different sizes of interventional pumps 200, requiring different fixtures for coaxial assembly of each size, thus resulting in higher assembly costs.

[0067] In view of the above, if Figures 4-7 As shown in the embodiment of this application, an assembly device 100 for an interventional pump 200 is proposed. The assembly device 100 is compatible with assembling different interventional pumps 200, such as interventional pumps 200 of different sizes.

[0068] In some embodiments, the assembly device 100 includes a first clamping mechanism 10 and a second clamping mechanism 20. The first clamping mechanism 10 has a first clamping cavity 10a, which can accommodate at least a portion of the motor 201, and the cavity wall of the first clamping cavity 10a can clamp the motor 201. The size of the first clamping cavity 10a is adjustable. The second clamping mechanism 20 includes a mounting base 21 and a plurality of clamping members 22 disposed on the mounting base. The plurality of clamping members 22 are spaced apart along a circumference to form the second clamping cavity 20a. The plurality of clamping members 22 can jointly clamp the insertion tube 203. Each clamping member 22 is movable relative to the mounting base 21 to make the size of the second clamping cavity 20a adjustable and to make the relative position of the insertion tube 203 and the impeller 202 adjustable, for example, to make the central axis of the insertion tube 203 coincide with the central axis of the impeller 202.

[0069] Since the size of the first clamping cavity 10a of the first clamping mechanism 10 is adjustable, it can accommodate motors 201 with different radial dimensions. At the same time, multiple clamping components 22 in the second clamping mechanism 20 are arranged circumferentially and can move relative to the mounting base 21, so that the size of the second clamping cavity 20a can also be adjusted, thereby clamping cannulas 203 with different radial dimensions. Therefore, the assembly device 100 is versatile and can be compatible with interventional pump assemblies of various radial dimensions without requiring each type of interventional pump assembly to be equipped with a special assembly tool, which helps to reduce the assembly cost of interventional pump assemblies of various radial dimensions. The insertion tube 203 is clamped by multiple clamping components 22 spaced along a circumference, and each clamping component 22 can move relative to the mounting base 21. This not only enables the centering and clamping of the insertion tube 203 through coordinated action, but also allows for more precise adjustment of the axial position of the insertion tube 203, thereby accurately controlling the relative position between the insertion tube 203 and the impeller 202. For example, the central axis of the insertion tube 203 can be adjusted to coincide with the central axis of the impeller 202, so as to achieve precise assembly of the intervention pump 200.

[0070] In some embodiments, the first clamping mechanism 10 includes a base 11 and a plurality of pressure caps 12. The base 11 is generally cuboid in shape. In other embodiments, the base 11 may also be cube-shaped, frustum-shaped, or truncated pyramid-shaped, etc. The pressure caps 12 are also generally cuboid in shape. In other embodiments, the pressure caps 12 may also be cube-shaped, frustum-shaped, or truncated pyramid-shaped, etc. The base 11 can be selectively and detachably connected to one of the plurality of pressure caps 12, for example, by threaded connection or snap-fit ​​connection. Each pressure cap 12 has a first groove 12a, which, when connected to the base 11, together with the base 11 forms a first clamping cavity 10a. At least some of the first grooves 12a in the plurality of pressure caps 12 are of different sizes, so that the size of the first clamping cavity 10a is adjustable.

[0071] It should be noted that the different sizes of at least some of the first grooves 12a in the plurality of pressure caps 12 means that the sizes of the first grooves 12a of each pressure cap 12 are all different, or that some of the pressure caps 12 have the same size of first grooves 12a, and the sizes of the first grooves 12a of these pressure caps 12 are different from the sizes of the first grooves 12a of other pressure caps 12. Where some pressure caps 12 have the same size of first grooves 12a, it is possible to replace the damaged pressure cap 12 with an undamaged one when there is a damaged pressure cap 12.

[0072] Since the base 11 in the first clamping mechanism 10 can be selectively and detachably connected to one of the multiple pressure caps 12, and each pressure cap 12 has a first groove 12a, when the pressure cap 12 is connected to the base 11, the first groove 12a and the base 11 together form the first clamping cavity 10a. Since at least some of the pressure caps 12 have different sizes of first groove 12a, when it is necessary to clamp motors 201 of different sizes, it is only necessary to select the pressure cap 12 of the corresponding size with the first groove 12a to cooperate with the base 11, and the size of the first clamping cavity 10a can be quickly changed without the need for overall replacement or complex adjustment. This method of replacing the pressure cap 12 instead of replacing the entire mechanism or adjusting the complex mechanism is simple in structure and convenient in operation. Moreover, when it is necessary to expand to new motor models, it is only necessary to add a corresponding pressure cap 12, without changing the original base 11 and production line layout. Furthermore, the split-type pressure cap 12 and base 11 cooperate to clamp and fix the motor 201, eliminating the need to rely on elastic deformation to clamp and fix the motor 201. This helps reduce stress concentration and allows the clamping force to be evenly distributed on both sides or around the motor, which helps reduce the probability of damaging the motor 201.

[0073] The groove wall of the first groove 12a is adapted to at least a portion of the outer peripheral surface of the housing 201b of the motor 201. Specifically, the groove wall of the first groove 12a is arc-shaped, such as a semi-cylindrical surface, a 1 / 3 cylindrical surface, or a 1 / 4 cylindrical surface. The housing 201b of the motor 201 is generally cylindrical. By adapting the groove wall of the first groove 12a to at least a portion of the outer peripheral surface of the housing 201b of the motor 201, for example, when the housing 201b of the motor 201 is generally cylindrical, the groove wall of the first groove 12a is arc-shaped, so that the pressure cap 12 and the base 11 cooperate to clamp the motor 201. The pressure cap 12 and the motor 201 are in surface contact, making the pressure distribution on the motor 201 more uniform, avoiding the problem of excessively tight or loose clamping in some areas, thereby improving the clamping stability and reliability of the first clamping mechanism 10 on the motor 201.

[0074] In some embodiments, such as Figure 8As shown, the base 11 has a mounting surface 111 and a second groove 11a. The mounting surface 111 is a plane. The second groove 11a has a first opening 111a, which is located on the mounting surface 111. When the pressure cap 12 is connected to the base 11, the pressure cap 12 is mounted on the mounting surface 111, and the position of the second groove 11a corresponds to the position of the first groove 12a, so that the first groove 12a and the second groove 11a together form a first clamping cavity 10a. The second groove 11a has a first groove wall surface 1101 and a second groove wall surface 1102 opposite to the first groove wall surface 1101. At least one of the first groove wall surface 1101 and the second groove wall surface 1102 is inclined to the mounting surface 111, and the distance between the first groove wall surface 1101 and the second groove wall surface 1102 gradually decreases along a direction perpendicular to the mounting surface 111 and pointing from the mounting surface 111 into the base 11, so that the second groove 11a has a shape that is wider at the top and narrower at the bottom. When motors 201 with different radial dimensions are placed in the second groove 11a of the base 11, the larger the radial dimension of the motor 201, the closer the contact position with the groove wall of the second groove 11a is to the mounting surface 111.

[0075] Since the pressure cap 12 is fixed to the base 11, the clamping force applied to the motor 201 mounted in the first clamping cavity 10a acts on the inclined groove wall surface. This force is decomposed along the inclined groove wall surface into a normal force perpendicular to the groove wall surface and a frictional force parallel to the groove wall surface. The horizontal component of the normal force presses the motor 201 against the opposite groove wall surface to eliminate radial clearance and ensure stable and reliable clamping. Therefore, at least one of the first groove wall surface 1101 and the second groove wall surface 1102 is inclined relative to the mounting surface 111, allowing the base 11 to not only accommodate various motor 201 sizes but also improve the reliability of clamping the motor 201. Furthermore, compared to an uneven mounting surface 111, the mounting surface 111 is planar, allowing the surface where the pressure cap 12 contacts the mounting surface 111 to also be made a simple plane, thereby ensuring that the pressure cap 12 is placed stably and is not easily shaken.

[0076] It should be noted that the minimum distance between the first groove wall 1101 and the second groove wall 1102 is less than the minimum radial dimension of the motor 201. At the same time, in the direction perpendicular to the mounting surface 111, when the second groove 11a is configured such that the motor 201 with the smallest radial dimension is placed in the second groove 11a, part of the motor 201 can protrude from the mounting surface 111. This ensures that when the cover 12 is installed on the mounting surface 111, the cover 12 can apply a clamping force to the motor 201 so that the motor 201 is clamped in the first clamping cavity 10a. Alternatively, when the cover 12 is installed on the mounting surface 111, at least part of the groove wall of the first groove 12a can be located in the second groove 11a to apply a clamping force to the motor 201. Furthermore, when the outer peripheral surface of the housing 201b of the motor 201 is approximately cylindrical, in addition to machining the first groove 12a on the cover 12 into a corresponding shape to fit the shape of the motor 201, the portion of the housing 201b with protrusions or grooves can be placed in the second groove 11a in a direction away from the mounting surface 111, so that the protrusions or grooves are suspended and do not contact the first groove wall 1101, the second groove wall 1102, and the cover 12, thereby reducing the machining difficulty of the first groove 12a and enhancing the clamping stability.

[0077] In some embodiments, both the first groove wall 1101 and the second groove wall 1102 are inclined relative to the mounting surface 111. With the depth of the second groove 11a remaining unchanged, compared to only one side of the groove wall being inclined while the other side is vertical, both sides of the groove wall being inclined allows for a larger opening in the second groove 11a, enabling it to accommodate motors 201 of more radial dimensions, thereby improving the versatility and compatibility of the first clamping mechanism 10.

[0078] In other embodiments, one of the first groove wall surface 1101 and the second groove wall surface 1102 is inclined relative to the mounting surface 111, and the other is perpendicular to the mounting surface 111.

[0079] In some embodiments, the distance from the side of the first groove wall 1101 closest to the mounting surface 111 to the mounting surface 111 is equal to the distance from the side of the second groove wall 1102 closest to the mounting surface 111 to the mounting surface 111. When creating the second groove 11a, the geometric parameters of the second groove 11a are easier to define and verify, which helps reduce the difficulty of mold making or machining. Furthermore, one side of the first groove wall 1101 is located on the mounting surface 111, and one side of the second groove wall 1102 is also located on the mounting surface 111.

[0080] In some embodiments, the distance from the side of the first groove wall 1101 away from the mounting surface 111 to the mounting surface 111 is also equal to the distance from the side of the second groove wall 1102 away from the mounting surface 111 to the mounting surface 111. When creating the second groove 11a, the geometric parameters of the second groove 11a are easier to define and verify, which helps to reduce the difficulty of mold making or machining.

[0081] In some other embodiments, the distance from the side of the first groove wall 1101 closest to the mounting surface 111 to the mounting surface 111 is greater than or less than the distance from the side of the second groove wall 1102 closest to the mounting surface 111 to the mounting surface 111; and / or the distance from the side of the first groove wall 1101 furthest from the mounting surface 111 to the mounting surface 111 is greater than or less than the distance from the side of the second groove wall 1102 furthest from the mounting surface 111 to the mounting surface 111.

[0082] In some embodiments, the angle between the first groove wall 1101 and the mounting surface 111 is equal to the angle between the second groove wall 1102 and the mounting surface 111. This makes the first groove wall 1101 and the second groove wall 1102 at least partially symmetrical. When the motor 201 is placed on the first groove wall 1101 and the second groove wall 1102, the motor 201 will contact both groove walls simultaneously and automatically center itself without the need for additional positioning structures. This facilitates the symmetrical processing of the first groove 12a of the pressure cap 12, which can clamp the motor 201 together with the first groove wall 1101 and the second groove wall 1102, thus reducing the processing difficulty of the first groove 12a of the pressure cap 12. At the same time, the clamping force applied after the pressure cap 12 is installed on the mounting surface 111 will be evenly transmitted to the motor 201 along the normal of the two groove walls, avoiding excessive force on one side of the motor 201, which may cause skewing or stress concentration. Furthermore, when the distances from the two groove walls to the mounting surface 111 are equal, the angle between the first groove wall 1101 and the mounting surface 111 is equal to the angle between the second groove wall 1102 and the mounting surface 111, making the second groove 11a a symmetrical structure. This is beneficial for simplifying the design and inspection of molds or machining processes.

[0083] In some embodiments, the angle θ1 between the first groove wall surface 1101 and the mounting surface 111 is 30°~60°, and the angle θ2 between the second groove wall surface 1102 and the mounting surface 111 is 30°~60°. Optionally, θ1 and θ2 are both 30°, or both θ1 and θ2 are 45°, or both θ1 and θ2 are 60°. The clamping force applied by the pressure cap 12 fixed to the base 11 acts on the inclined groove wall surface and is decomposed along the inclined groove wall surface into a normal force perpendicular to the groove wall and a frictional force parallel to the groove wall. The horizontal component of the normal force is the radial clamping force, and the angular range of θ1 and θ2 of 30°~60° is beneficial to ensure that the magnitude of this horizontal component force is moderate. Furthermore, the static friction angle between common engineering materials (such as metal-to-metal and metal-to-plastic) is typically between 6° and 15°, while the friction angle between rubber or elastomers and metal generally does not exceed 30°. Setting θ1 = 30°~60° and θ2 = 30°~60° effectively ensures that the contact angle between the groove wall and the motor 201 is greater than the friction angle. Therefore, after the clamping force generated by the pressure cap 12 is removed, the groove wall will not cause a self-locking jam on the motor 201, and the motor 201 can be smoothly removed from the second groove 11a or its position adjusted. In other embodiments, θ1 and θ2 are both less than 30°; or θ1 and θ2 are both greater than 60°.

[0084] In some embodiments, the second groove 11a further has a second opening 111b opposite to the first opening 111a. The base 11 is also provided with a stress relief groove 11b, which communicates with the second opening 111b, and the stress relief groove 11b and the second groove 11a are arranged in a direction perpendicular to the mounting surface 111.

[0085] The stress relief groove 11b communicates with the second opening 111b of the second groove 11a, which is opposite to the first opening 111a on the mounting surface 111. The groove 11b is also positioned perpendicular to the mounting surface 111, thereby expanding the stress-bearing area and reducing local stress concentration. Simultaneously, the stress relief groove 11b has a certain depth perpendicular to the mounting surface 111, preventing the two groove walls of the second groove 11a from interfering with the plane parallel to the mounting surface 111, thus avoiding damage to the motor 201 or the risk of it not being clamped. It also facilitates the removal of any cutting debris or impurities, preventing the accumulation of foreign matter from affecting clamping accuracy or damaging the motor 201, thereby improving the assembly safety and long-term reliability of the first clamping mechanism 10.

[0086] Specifically, the stress relief groove 11b includes a third groove wall 1103, a fourth groove wall 1104, and a groove bottom surface 1105. The third groove wall 1103 is connected to the side of the first groove wall 1101 away from the mounting surface 111, and the fourth groove wall 1104 is connected to the side of the second groove wall 1102 away from the mounting surface 111. The distance between the third groove wall 1103 and the fourth groove wall 1104 is greater than or equal to the minimum distance between the first groove wall 1101 and the second groove wall 1102. Both the third groove wall 1103 and the fourth groove wall 1104 are perpendicular to the mounting surface 111. The groove bottom surface 1105 is connected to the third groove wall 1103 and the fourth groove wall 1104, and the groove bottom surface 1105 is set parallel to the mounting surface 111. Alternatively, the bottom surface 1105 of the groove can be smoothly connected to the third groove wall surface 1103 and the fourth groove wall surface 1104 to reduce the sharp corners in the stress relief groove 11b and further weaken the local stress concentration.

[0087] In some embodiments, such as Figure 9 As shown, the pressure cap 12 has a top surface 121, a bottom surface 122, and a side surface 123 connected to the top surface 121 and the bottom surface 122. The pressure cap 12 is provided with a first through hole 12b and a second through hole 12c, both of which penetrate the top surface 121 and the bottom surface 122. The first groove 12a is located on the bottom surface 122, and when the pressure cap 12 is installed on the base 11, the bottom surface 122 of the pressure cap 12 abuts against the mounting surface 111 of the base 11.

[0088] like Figure 5 As shown, the first clamping mechanism 10 also includes a first connector 13 and a second connector 14. The first connector 13 can pass through the first through hole 12b and be detachably connected to the base 11, and the second connector 14 can pass through the second through hole 12c and be detachably connected to the base 11, thereby locking the pressure cap 12 onto the base 11. The first connector 13 and the second connector 14 are respectively inserted into the first through hole 12b and the second through hole 12c, and are detachably connected to the base 11 to fix the pressure cap 12 at two points on the base 11, providing a stable locking force and preventing the pressure cap 12 from deflecting or loosening when clamping the motor 201, thereby achieving quick replacement of the pressure cap 12 while maintaining reliable clamping performance.

[0089] The first connector 13 and the second connector 14 can be, but are not limited to, screws, bolts, studs and nuts, or quick-lock pins. When the first connector 13 and the second connector 14 are quick-lock pins, the base 11 has a pin hole with a locking structure. For example, the quick-lock pin is a ball-lock pin with an annular groove (or a corresponding ball socket) inside the pin hole. When the quick-lock pin is inserted, the steel ball inside is pushed out by a spring and locked into the annular groove to achieve axial locking. When it is pulled out, the unlocking sleeve on the pin body needs to be pulled. For another example, the pin hole is a smooth cylindrical hole, and the end of the quick-lock pin has an expandable elastic sleeve. After being inserted into the pin hole, it is rotated or pressed to make the elastic sleeve tighten on the hole wall.

[0090] In some embodiments, the first connector 13 includes a head 13a, a smooth rod section 13b, and a threaded rod section 13c connected in sequence. The smooth rod section 13b can pass through the first through hole 12b, and the threaded rod section 13c can be threadedly connected to the base 11. The base 11 is provided with a first threaded hole. The head 13a can press against the top surface 121 of the pressure cap 12, so that the pressure cap 12 is clamped between the head 13a and the base 11.

[0091] In some embodiments, the second connector 14 includes a rod 14a and a cap 14b connected to the rod 14a. The rod 14a can pass through the second through hole 12c and be detachably connected to the base 11. Specifically, the base 11 is provided with a second threaded hole, and the rod 14a is at least partially provided with external threads so that the rod 14a can be threadedly connected to the base 11. The cap 14b presses against the top surface 121 of the pressure cap 12, thereby clamping the pressure cap 12 between the cap 14b and the base 11.

[0092] In some embodiments, such as Figure 9 As shown, the second through hole 12c also has a notch 12d located on the side 123. The width of the rod portion 14a is smaller than the width of the notch 12d, so that when the cap portion 14b is not pressed against the top surface 121 of the cap 12, the cap 12 can rotate around the first connector 13, and the second connector 14 can be disengaged from the cap 12 through the notch 12d.

[0093] Therefore, when it is necessary to replace the motor 201 of the same size for assembly, the operator only needs to loosen the second connector 14 so that its cap 14b no longer presses against the top surface 121 of the cover 12, so that the cover 12 rotates around the first connector 13 to a position that does not cover the second groove 11a. Specifically, the cover 12 rotates around the smooth rod section 13b of the first connector 13, without having to completely loosen or remove the second connector 14, so that the cover 12 can be opened as a whole, and the motor 201 that has been assembled with the insertion tube 203 can be quickly taken out, and a new motor 201 of the same radial size can be inserted to be assembled with the insertion tube 203, which helps to improve assembly efficiency.

[0094] Moreover, the first connector 13 includes a head 13a, a smooth rod section 13b and a threaded rod section 13c connected in sequence. It can be detachably connected to the base 11 through the threaded rod section 13c, and the cover 12 can be rotated around the first connector 13 through the smooth rod section 13b. It can also cooperate with the second connector 14 to fix the cover 12 to the base 11. The structure is simple and reliable.

[0095] In other embodiments, the first connector 13 may also be an assembly including a pin with a cap at one end and a cotter pin or snap ring. The base 11 has a through hole, and the bare section of the pin passes through the first through hole 12b on the cover 12 and the through hole on the base 11. The end of the pin passes through the through hole on the base 11 and is locked by a cotter pin or snap ring, thereby allowing the cover 12 to rotate around the pin and be detachably fixed to the base 11.

[0096] In some other embodiments, the first clamping mechanism 10 has the same structure as the second clamping mechanism 20 in some embodiments herein.

[0097] In some embodiments, such as Figures 4-7 As shown, the mounting base 21 has an annular portion 210 with a cylindrical hole 210a. A portion of each clamping member 22 is located within the cylindrical hole 210a to form a second clamping cavity 20a within the cylindrical hole 210a. The second clamping cavity 20a and the first clamping cavity 10a are spaced apart and opposite to each other along the central axis of the annular portion 210. The cylindrical hole 210a is a rotationally symmetric hole, such as, but not limited to, a cylindrical hole, a regular hexagonal prism hole, or a regular octagonal prism hole, such that the cylindrical hole 210a has a unique central axis. Specifically, the mounting base 21 is fixedly connected to the first clamping mechanism 10, such that the second clamping cavity 20a and the first clamping cavity 10a are always spaced apart and opposite to each other along the central axis of the annular portion 210; or, the assembly device 100 has a limiting mechanism that extends along the central axis of the annular portion 210. The limiting mechanism can restrict the mounting base 21 to move only relative to the first clamping mechanism 10 along the central axis of the annular portion 210, so that the second clamping cavity 20a and the first clamping cavity 10a are always spaced apart and opposite to each other along the central axis of the annular portion 210.

[0098] Since the second clamping cavity 20a is located inside the columnar hole 210a, and the second clamping cavity 20a and the first clamping cavity 10a are spaced apart and opposite each other along the central axis of the annular portion 210, when the central axis of the impeller 202 coincides with that of the motor 201, the cavity wall of the first clamping cavity 10a clamps the motor 201, and multiple clamping components 22 jointly clamp the insertion tube 203 located in the second clamping cavity 20a, during the process of adjusting the insertion tube 203 to coincide with the central axis of the impeller 202, the mounting base 21 and the first clamping mechanism 10 can play the role of initial limiting and coarse positioning. Only a small range of fine adjustment of the position of the clamping components 22 is needed, which is beneficial to improving the assembly efficiency of the interventional pump 200.

[0099] In some embodiments, such as Figure 10 As shown, the annular portion 210 also has a plurality of through holes 210b spaced circumferentially along the annular portion 210. The mounting base 21 also includes a plurality of fixed shafts 211, each fixed shaft 211 being fixedly inserted through a through hole 210b. Each fixed shaft 211 has a through hole 212, and the through holes 212 extend radially along the annular portion 210. The number of fixed shafts 211 is equal to the number of clamping members 22, and each clamping member 22 is inserted through the through hole 212 of a fixed shaft 211, such that a portion of each clamping member 22 is located within a cylindrical hole 210a. The portions of the plurality of clamping members 22 located within the cylindrical hole 210a together form a second clamping cavity 20a. Each clamping member 22 is movable radially along the annular portion 210, so that the size of the second clamping cavity 20a is adjustable.

[0100] By restricting the radial movement of the clamping members 22 along the annular portion 210 and the fixed shaft 211, the contact positions of each clamping member 22 with the insertion tube 203 can be predicted and controlled. This facilitates the axial adjustment of the insertion tube 203 along the annular portion 210, ensuring that the clamping members 22 clamp the insertion tube 203 in areas with higher strength, thereby reducing the probability of deformation of the insertion tube 203. In addition, the annular portion 210 integrates an axial cylindrical hole 210a and a radial through hole 212. Multiple clamping members 22 are installed through the annular portion 210 to form a second clamping cavity 20a, which helps to make the second clamping mechanism 20 compact and reduce its space occupation.

[0101] In some embodiments, such as Figure 10As shown, the annular portion 210 and the fixed shaft 211 are detachably connected, for example, by a threaded connection or snap-fit ​​connection, or by a threaded rod or the like. Since the clamping member 22 moves within the through hole 212, it may experience frictional wear with the component forming the through hole 212, affecting adjustment accuracy. The detachable connection of the fixed shaft 211 and the annular portion 210 allows for individual replacement of the fixed shaft 211, resulting in lower cost compared to replacing the entire second clamping mechanism 20.

[0102] In some embodiments, the axial length of the through hole 212 is greater than the axial length of the through hole 210b. Compared to not providing a fixed shaft 211 and increasing the wall thickness of the annular portion 210 to provide the through hole 212 on the annular portion 210, in this embodiment, the mounting base 21 includes an annular portion 210 and a plurality of fixed shafts 211. Providing the through hole 212 on the fixed shafts 211 can reduce the volume of the annular portion 210 and reduce the burden on the moving assembly device 100.

[0103] In some other embodiments, the fixed shaft 211 and the annular portion 210 are fixedly connected in a non-removable manner.

[0104] In some embodiments, multiple clamping members 22 are evenly spaced along the circumference of the annular portion 210, which helps to make the clamping force applied by the clamping members 22 to the insertion tube 203 more uniform.

[0105] In some embodiments, the number of clamping members 22 is greater than or equal to three, for example, four, five, or six. Compared to having only two clamping members 22, having more than or equal to three clamping members 22 is beneficial for improving the clamping stability of the clamping members 22.

[0106] In some embodiments, such as Figure 10 and Figure 11 As shown, the through hole 212 includes a first hole section 212a and a second hole section 212b, which communicate with each other. The hole wall of the first hole section 212a is threaded. Each clamping member 22 includes an adjusting member 221 and a supporting member 222. A portion of the adjusting member 221 is received in the first hole section 212a and threadedly engages with the hole wall of the first hole section 212a. A portion of the supporting member 222 is received in the second hole section 212b and can slide along the second hole section 212b. One end of the supporting member 222 abuts against the adjusting member 221, and the other end is located in the cylindrical hole 210a. The portions of the supporting members 222 of the multiple clamping members 22 located in the cylindrical hole 210a together form a second clamping cavity 20a. The adjusting member 221 is threadedly engaged with the hole wall of the first hole section 212a, which can push the holding member 222 to slide toward the columnar hole 210a.

[0107] Because the adjusting member 221 is threaded into the hole wall of the first hole section 212a, the circumferential rotation of the adjusting member 221 can be converted into the axial displacement of the supporting member 222. Furthermore, the displacement of the supporting member 222 is linearly related to the rotation angle of the adjusting member 221, which facilitates precise control of the feed rate. This allows for precise and controllable fine-tuning of the length of the supporting member 222 extending into the cylindrical hole 210a, enabling high-precision assembly of the interventional pump 200. Moreover, since the supporting member 222 abuts against the adjusting member 221, the supporting member 222 will not rotate when the adjusting member 221 rotates, reducing friction between the supporting member 222 and the insertion tube 203, thereby reducing the risk of damaging the insertion tube 203.

[0108] In addition, the thread helix angle between the adjusting member 221 and the first hole section 212a can be made smaller than the equivalent friction angle, and the self-locking position is achieved by relying on the friction of the thread contact surface. Thus, when the position of the insertion tube 203 is adjusted to the target position, the clamping member 22 can be kept fixed relative to the mounting base 21 by the thread self-locking, so as to achieve stable clamping of the insertion tube 203 without the need for an additional locking structure. The structure is more compact and simple, with fewer parts and easier assembly.

[0109] In some embodiments, with Figure 10 Taking this as an example, there are four clamping components 22, which are located at the top, bottom, left, and right of the mounting base 21. The process of adjusting the position of the insertion tube 203 using the clamping components 22 is as follows: when it is necessary to move the insertion tube 203 to the right, the right adjustment component 221 can be rotated outwards towards the first hole segment 212a away from the second hole segment 212b, while the left adjustment component 221 can be rotated inwards towards the first hole segment 212a and closer to the second hole segment 212b. The left adjustment component 221 pushes against the holding component 222, applying a rightward thrust to the insertion tube 203, allowing the insertion tube 203 to move to the right. Under the rightward thrust of the insertion tube 203, the right holding component 222 also moves to the right. When it is necessary to move the cannula 203 to the left, the left adjusting member 221 can be rotated outwards towards the first hole section 212a away from the second hole section 212b, while the right adjusting member 221 can be rotated inwards towards the first hole section 212a and closer to the second hole section 212b. The right adjusting member 221 pushes against the holding member 222, applying a leftward thrust to the cannula 203, allowing it to move to the left. The left holding member 222 also moves to the left under the leftward thrust of the cannula 203. Similarly, when it is necessary to move the cannula 203 upwards or downwards, the upper and lower clamping members 22 can be adjusted accordingly.

[0110] In some embodiments, such as Figures 11-13As shown, the abutment member 222 includes a rod body 2221 and abutment ends 2222; one end of the rod body 2221 is fixedly connected to the abutment ends 2222, and the other end abuts against the adjusting member 221; the rod body 2221 is at least partially located in the second hole section 212b, and multiple abutment ends 2222 are located in the columnar hole 210a to jointly form a second clamping cavity 20a. The end face 222a of the abutment end 2222, which is away from the rod body 2221, is configured as an arc surface that can conform to the outer peripheral surface of the insertion tube 203. This allows the end face of the abutment end 2222 to fully contact the insertion tube 203, rather than point or line contact, thereby evenly distributing the clamping support force to the outer wall of the insertion tube 203, effectively avoiding local stress concentration and single-point high-pressure extrusion, and thus reducing damage to the insertion tube 203.

[0111] Among them, the end face 222a of the abutment end 2222 has a larger area than the end face area of ​​the rod 2221, so that the contact area between the abutment end 2222 and the insertion tube 203 is larger, and the insertion tube 203 can be clamped more stably.

[0112] In some embodiments, a portion of the rod 2221 can extend into the first bore 212a to abut against the adjusting member 221. In other embodiments, a portion of the adjusting member 221 can extend into the second bore 212b to abut against the retaining member 222.

[0113] In some embodiments, the abutment tip 2222 is a flexible component, such as a silicone or rubber component. Compared to using a rigid head to contact the cannula 203, using the abutment tip 2222 to contact the cannula 203 has elastic deformation characteristics, which can buffer the clamping force and avoid stress concentration and scratches, indentations and extrusion deformation caused by rigid contact, thus reducing the risk of damaging the cannula 203.

[0114] The adjusting member 221 and the supporting member 222 are separate components. Since the supporting end 2222 is a flexible component, it may be worn. When the supporting end 2222 is worn, only the supporting member 222 can be replaced, without replacing both the adjusting member 221 and the supporting member 222 at the same time, which helps to reduce assembly costs.

[0115] In some embodiments, the rod 2221 is a rigid component. The hardness and strength of the rigid component are higher than those of the flexible component, which enables the rod 2221 to provide better support for the end 2222, which is beneficial for the stable clamping of the insertion tube 203.

[0116] In some embodiments, such as Figure 11As shown, the second hole segment 2212 is circumferentially limited to the support member 222 so as to prevent the support member 222 from rotating relative to the mounting base 21 when the adjusting member 221 rotates relative to the mounting base 21 and pushes the support member 222 to move, thereby avoiding rotational friction between the support member 222 and the insertion tube 203.

[0117] Specifically, the rod body 2221 of the abutment member 222 has a first limiting plane 222b, and the hole wall of the second hole section 2212 is provided with a second limiting plane 2121 opposite to the first limiting plane 222b. The second limiting plane 2121 slides against the first limiting plane 222b to restrict the rotation of the abutment member 222 relative to the fixed shaft 211.

[0118] The limiting is achieved by the shape and contour matching between the abutment 222 and the second hole section 2212 of the fixed shaft 211. The circumferential rotation of the abutment 222 can be restricted by its own structure, without the need for additional anti-rotation components. The structure is more compact and simple, with fewer parts and easier assembly.

[0119] In some embodiments, there are multiple first limiting planes 222b, and the rod 2221 has a prism segment 2201, with multiple sides of the prism segment 2201 serving as first limiting planes 222b. The second hole segment 212b is a prism hole, and the inner wall of the second hole segment 212b has multiple second limiting planes 2121 surrounding the central axis of the second hole segment 212b. The number of second limiting planes 2121 is equal to and corresponds one-to-one with the number of first limiting planes 222b. A chamfer structure 222c is provided between two adjacent first limiting planes 222b; and / or, a clearance groove 2122 is provided between two adjacent second limiting planes 2121. This eliminates the sharp edges of the rod 2221 or the hole wall, and creates a gap between the rod 2221 and the inner wall of the second hole segment 212b along the radial direction of the second hole segment 212b, reducing sliding friction and preventing jamming when the abutment slides relative to the fixed shaft 211.

[0120] In other embodiments, unlike the aforementioned embodiments, the mounting base 21 does not have a fixed shaft 211. The through hole 210b of the annular portion 210 includes a threaded hole section and a guide hole section. The adjusting member 221 is partially located within the threaded hole section and threadedly engaged with it. The abutment member 222 is partially located within the guide hole section and can slide relative to it. One end of the abutment member 222 abuts against the adjusting member 221, and the other end is located within the cylindrical hole 210a. This reduces the number of parts and simplifies assembly.

[0121] In some other embodiments, unlike the aforementioned embodiments, the clamping member 22 only includes a retaining member 222, which passes through the through hole 210b and is slidable relative to the through hole 210b. The portion of the retaining member 222 located within the columnar hole 210a together forms a second clamping cavity 20a. Figure 5 As shown, the annular portion 210 has a plurality of locking holes 210c along its axial direction. The number of locking holes 210c is equal to the number of through holes 210b. The locking holes 210c and through holes 210b are spaced apart and communicate with each other. The mounting base 21 also includes a locking member 213, which is threadedly connected to the locking holes 210c. One end of the locking member 213 abuts against the abutment member 222 to lock and limit the abutment member 222. Thus, by loosening the locking member 213, the abutment member 222 can slide relative to the through hole 210b, thereby adjusting the size of the second clamping cavity 20a. By tightening the locking member 213, the size of the second clamping cavity 20a is maintained.

[0122] In some embodiments, such as Figure 4 , Figure 5 , Figure 7 , Figure 8 as well as Figure 14 As shown, the first clamping mechanism 10 is provided with a guide groove 11c, which extends along the central axis of the annular portion 210. The mounting base 21 is slidably disposed in the guide groove 11c. Thus, when assembling insertion tubes 203 of different lengths, the mounting base 21 can slide relative to the guide groove 11c to move closer to or further away from the first clamping mechanism 10, so that the clamping member 22 can clamp in the clamping area of ​​the insertion tube 203.

[0123] Specifically, the mounting base 21 further includes a sliding portion 214, which is fixedly connected to the annular portion 210 and slidably disposed within the guide groove 11c. Further, the base 11 has a mounting surface 112 and a peripheral surface 113 connecting the mounting surface 111 and the mounting surface 112, with the mounting surface 112 opposite to the mounting surface 111. The guide groove 11c is formed on the mounting surface 112 and extends along a first linear direction X to the peripheral surface 113, wherein the first linear direction X is parallel to the mounting surface 112; a second linear direction Y is defined as parallel to the mounting surface 112 and perpendicular to the first linear direction X; along the second linear direction Y and from the direction near the mounting surface 112 to the direction away from the mounting surface 112, the width of the guide groove 11c gradually increases, and the cross-section of the sliding portion 214 along the second linear direction Y is trapezoidal to fit the guide groove 11c and prevent the sliding portion 214 from falling out of the guide groove 11c.

[0124] In some embodiments, the sliding part 214 has opposing first and second surfaces, and the sliding part 214 is provided with a threaded hole 2140 passing through the first and second surfaces. The second clamping mechanism 20 further includes a fastener 25, which includes a threaded rod 251 and a nut 252. The threaded rod 251 is connected to the nut 252, and the threaded rod 251 passes through the threaded hole 2140. The end of the threaded rod 251 away from the nut 252 can abut against the guide groove 11c so that when the pushing or pulling force along the first linear direction is removed, the relative position between the sliding part 214 and the guide groove 11c is kept fixed by the friction between the threaded rod 251 and the guide groove 11c.

[0125] In other embodiments, unlike the aforementioned embodiments, the second clamping mechanism 20 further includes a transmission assembly 24, which includes a rack 241 and a gear 242. The rack 241 is fixed to the mounting base 21, specifically, the rack 241 is fixed to the sliding portion 214. The gear 242 is rotatably connected to the first clamping mechanism 10, and the gear 242 can mesh with the rack 241. When the gear 242 rotates relative to the first clamping mechanism 10, it can drive the rack 241 to move in a direction parallel to the central axis of the annular portion 210. Through the meshing transmission of the gear 242 and the rack 241, the second clamping mechanism 20 can be adjusted for smoother and more controllable linear feed, so that when the clamping member 22 clamps the insertion tube 203 in the axial clamping area, the insertion tube 203 can be connected to the motor 201.

[0126] In addition, the rack 241 and the gear 242 mesh with each other and lock themselves, so that when the force driving the gear 242 to rotate is removed, the relative position of the gear 242 and the rack 241 can remain fixed, so as to ensure that the assembly distance between the insertion tube 203 and the motor 201 remains fixed.

[0127] The transmission assembly 24 also includes a rotating handle 243 and a third connector 244 connected between the gear 242 and the rotating handle 243. The base 11 is provided with a corresponding through hole 110, and the third connector 244 passes through the through hole 110. The operator can operate the rotating handle 243 to make the gear 242 rotate, thereby driving the rack 241 to move in a direction parallel to the central axis of the annular portion 210.

[0128] In some embodiments, the melting point of the assembly device 100 is higher than the curing temperature of the adhesive used to connect the insertion tube 203 and the motor 201. In some processes, the insertion tube 203 and the motor 201 are connected by an adhesive, which needs to be placed in a baking environment to accelerate the curing of the adhesive. However, during the curing process, the adhesive will flow to a certain extent, causing displacement between the insertion tube 203 and the impeller 202, thus affecting the assembly accuracy. Therefore, after adjusting the insertion tube 203 and the impeller 202 to be coaxial, a device is usually needed to fix the relative position of the insertion tube 203 and the motor 201. The assembly device 100, after adjusting the insertion tube 203 and the impeller 202 to be coaxial, directly serves as a simpler device for fixing the relative position of the insertion tube 203 and the motor 201. Furthermore, the melting point of the assembly device 100 is higher than the curing temperature of the adhesive used to connect the insertion tube 203 and the motor 201, which helps prevent the assembly device 100 from melting when placed in an environment with a temperature equal to the curing temperature of the adhesive, thereby ensuring the final assembly accuracy.

[0129] Furthermore, the melting point of the assembly device 100 is at least 20° higher than the curing temperature of the adhesive used to connect the insertion tube 203 and the motor 201, which is more conducive to preventing the assembly device 100 from deforming.

[0130] In some embodiments, this application also provides a method for assembling an interventional pump, used in the assembly apparatus described in the foregoing embodiments, such as... Figure 16 As shown, the assembly method includes:

[0131] S1: Place the motor in the first clamping mechanism;

[0132] S2: Based on the central axis of the impeller fixed to the motor, the radial dimension of the impeller, and the radial dimension of the insertion tube, determine whether the second clamping cavity can accommodate at least part of the impeller and at least part of the insertion tube;

[0133] S3: When the second clamping cavity cannot accommodate either the impeller or the insertion tube, the first target clamping member to be operated and the first adjustment direction of the first target clamping member are determined from multiple clamping members based on the central axis of the impeller, the radial dimension of the impeller and the radial dimension of the insertion tube.

[0134] S4: Adjust the first target clamping member toward the first adjustment direction so that the second clamping cavity can accommodate at least part of the impeller and at least part of the insertion tube;

[0135] S5: Place at least part of the impeller into the second clamping cavity and clamp and fix the motor by the first clamping mechanism;

[0136] S6: Place the cannula in the second clamping cavity, such that at least a portion of the impeller is contained within the cannula;

[0137] S7: Determine whether the relative position of the cannula and the impeller is the target relative position;

[0138] S8: When the relative position of the tube and the impeller is not the target relative position, determine the second target clamping member to be operated and the second adjustment direction of the second target clamping member from among the multiple clamping members;

[0139] S9: Adjust the second target clamping component in the second adjustment direction to adjust the relative position of the tube and the impeller to the target relative position.

[0140] In some embodiments, the assembly method further includes, before clamping and fixing the motor by the first clamping mechanism:

[0141] Determine whether the distance between the mounting base and the first clamping mechanism needs to be adjusted based on the axial length of the insertion tube;

[0142] When it is necessary to adjust the distance between the mounting base and the first clamping mechanism, the third adjustment direction of the mounting base is determined according to the axial length of the insertion tube;

[0143] Adjust the mounting base in the third adjustment direction so that when the insertion tube is placed in the second clamping cavity and comes into contact with the motor, the clamping member can clamp the insertion tube in the clamping area.

[0144] In some embodiments, "clamping and fixing the motor via the first clamping mechanism" includes:

[0145] Select a suitable gland according to the radial dimension of the motor, and connect and fix the gland to the base to clamp and fix the motor.

[0146] In some embodiments, after adjusting the relative positions of the cannula and the impeller to the target relative positions, the assembly method further includes:

[0147] The tube and motor are bonded together with adhesive to obtain the initial pump body;

[0148] The pre-assembled pump body and the assembly device that clamps and fixes the pre-assembled pump body are placed together in a baking environment to allow the adhesive to cure. The temperature of the baking environment is a preset adhesive curing temperature, such as 60℃-90℃.

[0149] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0150] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An assembly apparatus for assembling an interventional pump (200), the interventional pump (200) comprising a motor (201), an impeller (202) fixedly connected to the motor (201), and a cannula (203) connectable to the motor (201), the cannula (203) being capable of accommodating at least a portion of the impeller (202), characterized in that, The assembly device includes: The first clamping mechanism (10) has a first clamping cavity (10a), which is capable of accommodating at least part of the motor (201), and the cavity wall of the first clamping cavity (10a) is capable of clamping the motor (201). The size of the first clamping cavity (10a) is adjustable. The second clamping mechanism (20) includes a mounting base (21) and a plurality of clamping members (22) disposed on the mounting base. The plurality of clamping members (22) are spaced apart along a circumference to form a second clamping cavity (20a). The plurality of clamping members (22) can clamp the insertion tube (203) together. Each clamping member (220) can move relative to the mounting base (21) so that the size of the second clamping cavity (20a) is adjustable and the relative position of the insertion tube (203) and the impeller (202) is adjustable.

2. The assembly device according to claim 1, characterized in that, The first clamping mechanism (10) includes a base (11) and a plurality of pressure caps (12), the base (11) being selectively and detachably connected to one of the plurality of pressure caps (12); each pressure cap (12) has a first groove (12a), when the pressure cap (12) is connected to the base (11), the first groove (12a) and the base (11) together form the first clamping cavity (10a), at least a portion of the first grooves (12a) of the plurality of pressure caps (12) having different sizes, so that the size of the first clamping cavity (10a) is adjustable.

3. The assembly device according to claim 2, characterized in that, The base (11) has a mounting surface (111) and a second groove (11a). The second groove (11a) has a first opening (111a) located on the mounting surface (111). When the pressure cap (12) is connected to the base (11), the pressure cap (12) is mounted on the mounting surface (111). The position of the second groove (11a) corresponds to the position of the first groove (12a), so that the first groove (12a) and the second groove (11a) together form the first clamping device. Cavity (10a); The second groove (11a) has a first groove wall surface (1101) and a second groove wall surface (1102) opposite to the first groove wall surface (1101), at least one of the first groove wall surface (1101) and the second groove wall surface (1102) is inclined relative to the mounting surface (111), and the distance between the first groove wall surface (1101) and the second groove wall surface (1102) gradually decreases along a direction perpendicular to the mounting surface (111) and pointing from the mounting surface (111) into the base (11).

4. The assembly device according to claim 3, characterized in that, The assembly device also has at least one of the following features; Both the first groove wall surface (1101) and the second groove wall surface (1102) are inclined relative to the mounting surface (111); The distance from the side of the first groove wall (1101) closest to the mounting surface (111) to the mounting surface (111) is equal to the distance from the side of the second groove wall (1102) closest to the mounting surface (111) to the mounting surface (111). The angle between the first groove wall surface (1101) and the mounting surface (111) is equal to the angle between the second groove wall surface (1102) and the mounting surface (111); The angle between the first groove wall surface (1101) and the mounting surface (111) is 30°~60°, and the angle between the second groove wall surface (1102) and the mounting surface (111) is 30°~60°. The second groove (11a) also has a second opening (111b) opposite to the first opening (111a), and a stress relief groove (11b) is also provided on the base (11). The stress relief groove (11b) communicates with the second opening (111b), and the stress relief groove (11b) and the second groove (11a) are arranged in a direction perpendicular to the mounting surface (111).

5. The assembly apparatus according to any one of claims 2-4, characterized in that, The groove wall of the first groove (12a) is arc-shaped.

6. The assembly device according to claim 2, characterized in that, The pressure cap (12) has a top surface (121), a bottom surface (122), and a side surface (123) connected to the top surface (121) and the bottom surface (122). The pressure cap (12) is provided with a first through hole (12b) and a second through hole (12c). The first through hole (12b) and the second through hole (12c) both penetrate the top surface (121) and the bottom surface (122). The second through hole (12c) also has a notch (12d) located on the side surface (123). The first clamping mechanism (10) further includes a first connector (13) and a second connector (14); the first connector (13) can pass through the first through hole (12b) and be detachably connected to the base (11), and the second connector (14) can pass through the second through hole (12c) and be detachably connected to the base (11), thereby locking the pressure cap (12) onto the base (11); The second connector (14) includes a rod (14a) and a cap (14b) connected to the rod (14a). The rod (14a) can pass through the second through hole (12c) and is detachably connected to the base (11). The cap (14b) presses against the top surface (121) of the cover (12), and the cover (12) is clamped between the cap (14b) and the base (11). The width of the rod (14a) is smaller than the width of the notch (12d). When the cap (14b) is not pressed against the top surface (121) of the cover (12), the cover (12) can rotate around the first connector (13), and the second connector (14) can be dislodged from the cover (12) through the notch (12d).

7. The assembly device according to claim 6, characterized in that, The first connector (13) includes a head (13a), a smooth rod section (13b), and a threaded rod section (13c) connected in sequence. The smooth rod section (13b) can pass through the first through hole (12b), and the threaded rod section (13c) can be threadedly connected to the base (11). The head (13a) can press against the top surface (121) of the cover (12), so that the cover (12) is clamped between the head (13a) and the base (11). And / or, the rod (14a) can be threadedly connected to the base (11).

8. The assembly device according to claim 1, characterized in that, The mounting base (21) has an annular portion (210) with a columnar hole (210a), a portion of each of the clamping members (220) being located within the columnar hole (210a) to form a second clamping cavity (20a) within the columnar hole (210a), wherein the second clamping cavity (20a) and the first clamping cavity (10a) are spaced apart and opposite to each other along the central axis of the annular portion (210).

9. The assembly device according to claim 1, characterized in that, The mounting base (21) has an annular portion (210) and a plurality of fixed shafts (211). The annular portion (210) has a columnar hole (210a). The annular portion (210) also has a plurality of through holes (210b) spaced circumferentially along the annular portion (210). Each fixed shaft (211) is fixedly inserted through one of the through holes (210b). Each fixed shaft (211) has a through hole (212) extending radially along the annular portion (210). The number of fixed shafts (211) The quantity is equal to the number of the clamping members (22), each clamping member (22) is inserted through the through hole (212) of one of the fixed shafts (211) so that a portion of each clamping member (22) is located in the columnar hole (210a), and the portions of the multiple clamping members (22) located in the columnar hole (210a) together form the second clamping cavity (20a); each clamping member (22) can move radially along the annular portion (210) so that the size of the second clamping cavity (20a) is adjustable.

10. The assembly apparatus according to claim 9, characterized in that, The through hole (212) has a first hole section (212a) and a second hole section (212b), the first hole section (212a) and the second hole section (212b) are connected, and the hole wall of the first hole section (212a) is provided with threads; Each of the clamping members (22) includes an adjusting member (221) and a retaining member (222). A portion of the adjusting member (221) is received in the first hole segment (212a) and threadedly engaged with the hole wall of the first hole segment (212a). A portion of the retaining member (222) is received in the second hole segment (212b). The retaining member (222) is slidable along the second hole segment (212b). One end of the retaining member (222) abuts against the adjusting member (221), and the other end is located in the cylindrical hole (210a). The portions of the retaining members (222) of the plurality of clamping members (22) located in the cylindrical hole (210a) together form the second clamping cavity (20a). The retaining member (222) can be pushed against the adjusting member (221) and slid towards the cylindrical hole (210a) by threading the adjusting member (221) with the hole wall of the first hole segment (212a).

11. The assembly apparatus according to claim 10, characterized in that, The abutment (222) includes a rod (2221) and abutment ends (2222); one end of the rod (2221) is fixedly connected to the abutment end (2222), and the other end abuts against the adjusting member (221); the rod (2221) is at least partially located in the second hole section (212b), and a plurality of abutment ends (2222) are located within the columnar hole (210a) to jointly enclose and form the second clamping cavity (20a), wherein: The abutment end (2222) is a flexible element; and / or, the end face (222a) of the abutment end (223) away from the rod (2221) is configured as an arc surface that can conform to the outer peripheral surface of the cannula (203).

12. The assembly apparatus according to claim 11, characterized in that, The rod (2221) has a first limiting plane (222b), and the second hole section (212b) has a second limiting plane (2121) on its hole wall that is opposite to the first limiting plane (222b). The second limiting plane (2121) slides against the first limiting plane (222b) to restrict the rod (2221) from rotating relative to the fixed shaft (211).

13. The assembly apparatus according to claim 12, characterized in that, The first limiting plane (222b) is multiple, and the rod (2221) has a prism segment (2201), and multiple sides of the prism segment (2201) are the first limiting plane (222b). The second hole segment (212b) is a prism hole, and the inner wall of the second hole segment (212b) has a plurality of second limiting planes (2121) surrounding the central axis of the second hole segment (212b); the number of the second limiting planes (2121) is equal to the number of the first limiting planes (222b) and corresponds one-to-one; Among them, a chamfer structure (222c) is provided between two adjacent first limiting planes (222b); and / or, a clearance groove (2122) is provided between two adjacent second limiting planes (2121).

14. The assembly apparatus according to any one of claims 8-13, characterized in that, The first clamping mechanism (10) is provided with a guide groove (11c), which extends along the central axis of the annular portion (210); the mounting base (21) is slidably disposed in the guide groove (11c).

15. The assembly apparatus according to claim 14, characterized in that, The second clamping mechanism (20) further includes a transmission assembly (24), which includes a rack (241) and a gear (242). The rack (241) is fixed to the mounting base (21), and the gear (242) is rotatably connected to the first clamping mechanism (10). The gear (242) can mesh with the rack (241). When the gear (242) rotates relative to the first clamping mechanism (10), it can drive the rack (241) to move in a direction parallel to the central axis of the annular portion (210).

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