Blood pump fixing tooling and blood pump testing system

Abstract

The present invention relates to a blood pump fixing tooling and a blood pump testing system. The blood pump fixing tooling includes a base frame, a rotating device and a positioning device; wherein, the base frame includes a base and a bracket arranged on the base; the rotating device is arranged on the base, and the rotating device includes a rotating member capable of rotating relative to the base; the positioning device includes a positioning frame and an adjusting member; the positioning frame is installed on the bracket and can move relative to the bracket, the positioning frame is provided with a pump hole located above the rotating member for installing the blood pump, and the pump hole can allow the blood pump to pass through so that the rotor of the blood pump can be in transmission connection with the rotating member; the adjusting member connects the positioning frame and the bracket, and the adjusting member can adjust the movement of the positioning frame relative to the bracket, so that the rotation axis of the rotor of the blood pump installed on the positioning frame coincides with the rotation axis of the rotating member. The blood pump fixing tooling of the present invention can improve the stability of the rotation of the rotor of the blood pump relative to the stator, so as to improve the accuracy of testing the impedance and inductive reactance of the motor of the blood pump.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a blood pump fixing tool and a blood pump testing system. Background Art

[0002] An invasive blood pump is designed to be inserted percutaneously into a patient's blood vessel, such as an artery or vein in the thigh or armpit, and then advanced into the patient's heart to function as an auxiliary device for the left or right ventricle. Therefore, an invasive blood pump may also be referred to as an intracardiac blood pump or an intravascular blood pump.

[0003] This type of blood pump usually includes an impeller and a motor connected to the impeller, so that the motor drives the impeller to rotate and drives the blood to flow. The motor includes a stator and a rotor. In order to achieve consistency in the motor assembly, it is necessary to measure the impedance and inductance of the motor. Therefore, there is an urgent need for a fixed fixture that can fix the blood pump and allow the rotor and stator of the blood pump to move relative to each other, so as to facilitate subsequent testing of the impedance and inductance of the motor of the blood pump. However, the traditional fixed fixture used to fix the blood pump usually has the problem of insufficient relative motion stability of the rotor and stator of the blood pump during the test process, which greatly affects the accuracy of the subsequent test results. Summary of the invention

[0004] Based on this, the present invention provides a blood pump fixing tooling which is simple in structure, easy to operate and can improve the stability of the relative movement between the rotor and the stator. The present invention achieves the above-mentioned purpose through the following technical solutions.

[0005] The present invention provides a blood pump fixing tool, which includes a base frame, a rotating device and a positioning device; wherein the base frame includes a base and a bracket arranged on the base; the rotating device is arranged on the base, and the rotating device includes a rotating member that can rotate relative to the base; the positioning device includes a positioning frame and an adjusting member. wherein the positioning frame is connected to the bracket and can move relative to the bracket, the positioning frame is provided with a pump hole, the pump hole can be passed through by the blood pump so that the rotor of the blood pump can be connected to the rotating member by transmission; the adjusting member connects the positioning frame and the bracket, and the adjusting member can adjust the positioning frame to move relative to the bracket, so that the rotation axis of the rotor of the blood pump installed on the positioning frame coincides with the rotation axis of the rotating member.

[0006] In one embodiment, the positioning frame includes a positioning plate installed on the bracket, and a matching plate detachably connected to the positioning plate; the pump hole includes a first hole groove arranged on the positioning plate and a second hole groove arranged on the matching plate.

[0007] In one embodiment, the inner diameter of the second hole groove is greater than the outer diameter of the blood pump; the inner diameter of the first hole groove is gradually decreased from the end close to the second hole groove towards the direction away from the second hole groove, so that the blood pump can be inserted through the second hole groove and laterally moved into the first hole groove to be in interference fit with the first hole groove.

[0008] In one embodiment, the positioning device further includes a locking member installed on the positioning frame. One end of the locking member is inserted into the pump hole along the radial direction of the pump hole through the outer side surface of the positioning frame, and the locking member can adjust the length of its insertion into the pump hole to abut against the blood pump installed in the pump hole.

[0009] In one embodiment, the locking member is installed on the mating plate of the positioning frame. One end of the locking member is inserted into the second hole groove of the pump hole and is opposite to the first hole groove of the pump hole.

[0010] In one embodiment, the positioning frame can translate relative to the bracket along the front-back direction of the rotating member; alternatively, the positioning frame can translate relative to the bracket along the left-right direction of the rotating member.

[0011] In one embodiment, the bracket is arranged on one side of the rotating device; the adjusting member is arranged as an adjusting screw. The adjusting screw is connected to the positioning frame in a penetrating manner and passes through the positioning frame to be threadedly connected to the bracket.

[0012] In one embodiment, the number of the adjusting screws is at least two, and at least two of the adjusting screws are arranged at intervals along the width direction of the positioning frame.

[0013] In one embodiment, the rotating device further includes a fixed platform fixedly installed on the base; the rotating member is rotatably installed on the fixed platform, and a connecting shaft for connecting the blood pump is convexly provided on the upper surface of the rotating member.

[0014] The present invention also provides a blood pump test system, which includes a test instrument and a blood pump fixing tool. The test instrument can be electrically connected to a blood pump installed on the blood pump fixing tool to measure the impedance and inductance of the blood pump. The blood pump fixing tool includes a base frame, a rotating device and a positioning device; wherein the base frame includes a base and a bracket arranged on the base; the rotating device is arranged on the base, and the rotating device includes a rotating member that can rotate relative to the base; the positioning device includes a positioning frame and an adjusting member. wherein the positioning frame is installed on the bracket and can move relative to the bracket, the positioning frame is provided with a pump hole located above the rotating member for the blood pump to be installed, the pump hole can be passed through by the blood pump so that the rotor of the blood pump can be connected to the rotating member in a transmission manner; the adjusting member connects the positioning frame and the bracket, and the adjusting member can adjust the positioning frame to move relative to the bracket, so that the rotation axis of the rotor of the blood pump installed on the positioning frame coincides with the rotation axis of the rotating member.

[0015] The blood pump fixing fixture of the present invention is provided with a positioning device on the blood pump fixing fixture. The positioning device is used to install the positioning frame of the blood pump so that it can move relative to the base frame, and the rotation axis of the rotor of the blood pump is adjusted to coincide with the rotation axis of the rotating member, so that the rotor of the blood pump can stably rotate relative to the stator, thereby improving the accuracy of the blood pump test results. In addition, compared with the traditional fixing fixture with a complex structure, the blood pump fixing fixture of the present invention has a simple structure and is easy to operate, which is conducive to improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of the blood pump testing system provided by the present invention after the blood pump is clamped.

[0017] Figure 2 for Figure 1 A cross-sectional view of a blood pump fixing fixture of a blood pump testing system and a blood pump clamped therein is shown.

[0018] Figure 3 for Figure 1 The schematic diagram of the structure of the blood pump fixing tool of the blood pump testing system is shown.

[0019] Figure 4 for Figure 3 A top view of the blood pump fixture is shown.

[0020] Figure 5 for Figure 4 A partial enlarged view of the blood pump fixing fixture at point A is shown.

[0021] Figure 6 for Figure 4 The cross-sectional view of the blood pump fixing fixture along line II is shown.

[0022] Figure 7 For Figure 3 the exploded view of the rotating device of the blood pump fixing tooling shown in the figure.

[0023] Explanation of the reference numerals in the attached drawings

[0024] 100 - blood pump test system, 200 - blood pump, 300 - blood pump fixing tooling, 400 - test instrument;

[0025] 202 - rotor, 204 - output cable, 206 - impeller;

[0026] 310 - base frame, 311 - base, 312 - bracket, 313 - first installation groove, 314 - bottom, 315 - support part, 316 - square corner, 317 - clearance groove, 318 - second installation groove, 319 - third installation groove;

[0027] 320 - positioning device, 330 - rotating device, 340 - positioning frame, 350 - locking part, 360 - pump hole, 370 - adjusting part;

[0028] 342 - positioning plate, 344 - mating plate, 351 - locking nut, 352 - locking shaft, 353 - flexible pad, 354 - strip-shaped recess;

[0029] 361 - second hole groove, 362 - first hole groove, 363 - first end, 364 - second end, 365 - hole wall, 366 - clamping space, 367 - auxiliary hole;

[0030] 331 - rotating part, 332 - fixed table, 333 - connecting shaft, 335 - dial, 336 - fixed groove, 337 - groove, 338 - boss. Detailed implementation manners

[0031] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0032] In the present invention, unless otherwise clearly defined and limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0034] The inventors of the present application found that after the motor of the interventional blood pump is assembled, it is necessary to measure the impedance and inductive reactance of the motor to ensure the assembly consistency of the stator and rotor of the motor. However, there is an urgent need for a blood pump fixing tooling to facilitate the subsequent accurate testing of the impedance and inductive reactance of the motor of the blood pump.

[0035] Please refer to Figure 1 and Figure 2 , in order to improve at least some of the above technical problems, the present application provides a blood pump fixing tooling and a blood pump testing system. Among them, the blood pump testing system 100 includes a blood pump fixing tooling 300 and a testing instrument 400; wherein, the blood pump fixing tooling 300 can be used for installing and fixing the blood pump 200 and driving the rotor 202 of the motor of the blood pump 200 to rotate relative to the stator; the testing instrument 400 can be electrically connected to the blood pump 200 to measure the impedance and inductive reactance of the motor of the blood pump 200 when the rotor 202 of the motor of the blood pump 200 is driven to rotate relative to the stator by the blood pump fixing tooling 300, thereby detecting the assembly consistency of the motor. When the test result does not meet the requirements, the stator and rotor 202 of the motor are reassembled and the impedance and inductive reactance of the motor are measured again until the test result meets the requirements.

[0036] The testing instrument 400 is electrically connected to the output cable 204 of the blood pump 200 to obtain the relevant data of the motor when the rotor 202 rotates. It should be noted that the data transmission method between the testing instrument 400 and the blood pump 200 is not limited to cables, and can also be realized by wireless transmission. Since the testing instrument 400 is a common instrument for measuring the impedance and inductive reactance of the motor, it will not be elaborated here.

[0037] The blood pump fixing tool of the present invention can adjust the fixing position of the blood pump 200 so that the rotation axis of the rotor of the blood pump 200 can coincide with the rotation axis of the rotating member driving the rotor to rotate, so as to improve the stability requirement of the blood pump rotor relative to the stator, thereby improving the accuracy of the test of the blood pump test system 100. The blood pump fixing tool provided by the present invention is described in detail below in conjunction with the specific implementation and the drawings of the specification.

[0038] See also Figures 1 to 3 In one embodiment, the blood pump fixing tool 300 includes a base frame 310, a rotating device 330 and a positioning device 320. The base frame 310 includes a base 311 and a bracket 312 arranged on the base 311; the rotating device 330 is arranged on the base 311, and the rotating device 330 includes a rotating member 331 that can rotate relative to the base 311; the positioning device 320 includes a positioning frame 340 and an adjusting member 370; the positioning frame 340 is connected to the bracket 312 and can move relative to the bracket 312, and the positioning frame 340 is provided with a pump hole 360, and the pump hole 360 ​​can be passed through by the blood pump 200 so that the rotor of the blood pump 200 can be connected to the rotating member 331 by transmission; the adjusting member 370 connects the positioning frame 340 and the bracket 312, and the adjusting member 370 can adjust the positioning frame 340 to move relative to the bracket 312, so that the rotation axis of the rotor 202 of the blood pump 200 installed on the positioning frame 340 coincides with the rotation axis of the rotating member 331.

[0039] Specifically, the positioning frame 340 is located above the rotating member 331, and the pump hole 360 ​​of the positioning frame 340 is arranged opposite to the center of the rotating member 331. When the blood pump 200 is installed on the blood pump fixing tool 300, the blood pump 200 is first passed through the pump hole 360 ​​of the positioning frame 340, so that the distal end of the blood pump 200 (i.e., the end away from the physician when the blood pump 200 is inserted into the patient's body) faces the rotating member 331, and the rotor 202 of the blood pump 200 is connected to the rotating member 331 by transmission; then, the positioning frame 340 is adjusted to move relative to the bracket 312 by the adjusting member 370 to calibrate the rotation axis of the rotor 202 and the rotation axis of the rotating member 331 until the rotation axes of the two coincide. In this way, the deflection of the rotor 202 of the blood pump 200 during the rotation process can be reduced, and the stability of the rotation of the rotor 202 can be improved. Subsequently, the test instrument 400 is turned on to measure the impedance and inductance of the motor when the rotor 202 of the motor of the blood pump 200 rotates. During this measurement process, if the rotor 202 is found to be wobbling, the test instrument 400 can be turned off, and the rotation axis of the rotor 202 and the rotation axis of the rotating member 331 can be calibrated again through the positioning frame 340. After the rotation axes of the two coincide, the test instrument 400 can be restarted for measurement.

[0040] It should be noted that the rotor 202 of the blood pump 200 can be directly connected to the rotating member 331 or indirectly connected to the rotating member 331. In one embodiment, the rotor 202 of the motor of the blood pump 200 is connected to the impeller 206, and the rotating member 331 of the rotating device 330 is connected to the impeller 206. That is to say, the rotor 202 and the rotating member 331 are indirectly connected through the impeller 206. The rotating member 331 drives the rotor 202 to rotate through the impeller 206, so as to realize the relative rotation of the rotor 202 with respect to the stator. It can be understood that the blood pump fixing tooling 300 can be manufactured and sold separately; the blood pump 200 is an independent structure that can be installed on the blood pump fixing tooling 300 and does not belong to the component of the blood pump fixing tooling 300.

[0041] Of course, in other embodiments, the rotating member 331 of the rotating device 330 can also be connected to the rotating shaft of the motor to drive the rotor 202 to rotate, and then install the impeller 206 on the rotating shaft after the test; or, the blood pump test system 100 further includes a connecting tool, one end of the connecting tool is connected to the rotating shaft of the motor, and the other end is connected to the rotating member 331 of the rotating device 330, that is, the rotating member 331 is indirectly connected to the rotor 202 and drives the rotor 202 to rotate through the connecting tool.

[0042] For the blood pump fixing tooling 300 of the present invention, by providing a positioning device 320 on the blood pump fixing tooling 300, the positioning bracket 340 for installing the blood pump 200 can move relative to the base frame 310, so as to adjust the position of the blood pump 200, and further adjust the position of the rotor 202 of the blood pump 200 so that its rotation axis moves to coincide with the rotation axis of the rotating member 331, so that the rotor 202 of the blood pump 200 can rotate stably relative to the stator, improving the accuracy of the test results of the blood pump 200. In addition, compared with the traditional fixing tooling with a complex structure, the blood pump fixing tooling 300 of the present invention has a simple structure and is easy to operate, which is beneficial to improving the test efficiency.

[0043] Please refer to Figure 3 and Figure 4In one embodiment, the bracket 312 of the base frame 310 is mounted on the base 311 and protrudes upward from the base 311, and the bracket 312 is located on one side of the base 311. Specifically, the base 311 is provided with a first mounting groove 313, and the bottom 314 of the bracket 312 has a square corner 316, and the two side surfaces of the square corner 316 are in contact with the two groove walls of the first mounting groove 313, and the connection between the two groove walls of the first mounting groove 313 is provided with an air avoidance groove 317, and the square corner 316 is located in the air avoidance groove 317, thereby pre-positioning the bracket 312 in the first mounting groove 313, and then fixing the bottom 314 of the bracket 312 in the first mounting groove 313 by screws or studs. The first mounting groove 313 has only two groove walls, which is convenient for placing the bracket 312 therein, and the two side surfaces of the square corner 316 cooperate with the two groove walls of the first mounting groove 313 for pre-positioning, without the need for additional alignment of the screw holes, thereby improving assembly efficiency.

[0044] The positioning frame 340 of the positioning device 320 is installed on the bracket 312 and is located above the rotating device 330. It can be understood that during the test of the blood pump 200, when the rotor 202 of the blood pump 200 deflects, the rotation axis of the rotor 202 is laterally offset and misaligned with the rotation axis of the rotating member 331. At this time, the position of the positioning frame 340 is adjusted by the adjusting member 370 so that the blood pump 200 installed on the positioning frame 340 is translated in the horizontal direction, so that the rotation axis of the rotor 202 coincides with the rotation axis of the rotating member 331.

[0045] As for the direction of translation of the positioning frame 340, there are many design methods. For example, the positioning frame 340 can translate relative to the bracket 312 along the left and right direction of the rotating member 331, such as Figure 3 or, the positioning frame 340 can be translated relative to the bracket 312 along the front and rear direction of the rotating member 331, that is, as Figure 3 Specifically in this embodiment, the positioning frame 340 can translate relative to the bracket 312 along the left-right direction (ie, the X direction) of the rotating member 331 .

[0046] In one embodiment, the bracket 312 is disposed on one side of the rotating device 330 ; the adjusting member 370 is configured as an adjusting screw, which is connected to the positioning frame 340 and passes through the positioning frame 340 to be threadedly connected to the bracket 312 .

[0047] Specifically, the bracket 312 includes a bottom 314 and a support portion 315 connected to the bottom 314; a second mounting groove 318 and threaded holes are provided on the support portion 315; the positioning frame 340 has a mounting plate extending downward, and the mounting plate is provided with through holes. The mounting plate is mounted in the second mounting groove 318. The specific structure of the second mounting groove 318 is set with reference to the first mounting groove 313, and the second mounting groove 318 also functions to pre-position the mounting plate. The adjusting screw passes through the through hole of the mounting plate and is connected to the threaded hole. In this way, by rotating the adjusting screw, the positioning frame 340 can be adjusted to translate in the X direction, and then the position of the blood pump 200 on the positioning frame 340 can be adjusted, so that the rotation axis of the rotor 202 of the blood pump 200 coincides with the rotation axis of the rotating member 331. This can greatly reduce the yaw of the rotor 202 of the blood pump 200 during rotation, improve the stability of the rotation of the rotor 202, further improve the accuracy of the test results, and be applicable to blood pumps 200 with different outer diameters.

[0048] To improve the connection stability between the positioning frame 340 and the bracket 312, optionally, the number of the adjusting screws is at least two, and at least two of the adjusting screws are arranged at intervals in the width direction of the positioning frame 340. Specifically, at least two of the adjusting screws are all mounted on the mounting plate of the positioning frame 340 and are arranged at intervals in the Y direction. The cooperation of at least two of the adjusting screws can improve the connection stability between the positioning frame 340 and the bracket 312, and ensure that the positioning frame 340 can stably support the blood pump 200.

[0049] Please refer to Figures 3 to 5 , in an embodiment, the positioning frame 340 includes a positioning plate 342 mounted on the bracket 312 and a mating plate 344 detachably connected to the positioning plate 342; the pump hole 360 includes a first hole groove 362 provided on the positioning plate 342 and a second hole groove 361 provided on the mating plate 344.

[0050] Specifically, the positioning plate 342 is provided with a first hole groove 362 at one end away from the bracket 312; one end of the mating plate 344 facing the bracket 312 is provided with a second hole groove 361, and the second hole groove 361 is opposite to the first hole groove 362. After the positioning plate 342 and the mating plate 344 are connected together, the first hole groove 362 of the positioning plate 342 and the second hole groove 361 of the mating plate 344 are butt-jointed and matched to form the pump hole 360. With such a design, the pump hole 360 is formed by splicing the positioning plate 342 and the mating plate 344, which can facilitate the subsequent adjustment of the size of the pump hole 360, avoid the situation where the size is fixed due to single-plate processing and cannot be adjusted, so as to meet the fixation of blood pumps 200 with different size errors.

[0051] As for the specific manner of the detachable connection between the positioning plate 342 and the mating plate 344, there can be multiple design solutions. For example, one of the positioning plate 342 and the mating plate 344 is provided with a buckle, and the other is provided with a buckle hole connected to the buckle; for another example, one of the positioning plate 342 and the mating plate 344 is provided with a screw hole, and the other is provided with a connection hole corresponding to the screw hole, and a screw is passed through the connection hole and the screw hole to detachably connect the positioning plate 342 and the mating plate 344 together.

[0052] In one embodiment, the positioning plate 342 and the mating plate 344 are spliced and connected by two studs or screws, that is, the studs or screws penetrate the mating plate 344 from the outside to the inside to connect the splicing end of the positioning plate 342. It should be noted that in other embodiments, the splicing connection manner between the positioning plate 342 and the mating plate 344 can also adopt adhesive connection or other connection manners. In order to reduce scratches on the blood pump 200, the material of the positioning frame 340 can be, but is not limited to, plastic, that is, the materials of both the positioning plate 342 and the mating plate 344 are plastic.

[0053] Furthermore, the inner diameter of the second hole groove 361 is larger than the outer diameter of the blood pump 200; the inner diameter of the first hole groove 362 is gradually decreasing from the end close to the second hole groove 361 towards the direction away from the second hole groove 361, so that the blood pump 200 can be inserted through the second hole groove 361 and laterally moved into the first hole groove 362 to have an interference fit with the first hole groove 362.

[0054] Specifically, the first end 363 of the first hole groove 362 close to the second hole groove 361, and the second end 364 away from the second hole groove 361; the first hole groove 362 has two opposite side walls 365, the two side walls 365 are oppositely arranged, and a clamping space 366 is formed between the two side walls 365. The inner diameter of the first hole groove 362 (and the width of the clamping space 366) is gradually decreasing from the first end 363 to the second end 364, so that the opposite side walls 365 of the first hole groove 362 are in an angular shape. At least a part of the blood pump 200 can enter the first hole groove 362 through the first end 363.

[0055] When installing the blood pump 200 onto the positioning device, the blood pump 200 can first be passed through the second hole groove 361 of the pump hole 360. Since the inner diameter of the second hole groove 361 is larger than the outer diameter of the blood pump, it is less difficult for the blood pump 200 to pass through the second hole groove 361, facilitating the passing of the blood pump 200; then, the blood pump 200 is laterally moved from the second hole groove 361 into the first hole groove 362 of the pump hole 360. Since the inner diameter of the first hole groove 362 gradually shrinks, the blood pump 200 is gradually clamped and fixed by the opposite side walls 365 of the first hole groove 362, so that the blood pump 200 is snapped into the first hole groove 362 of the blood pump and has an interference fit with the first hole groove 362, realizing the positioning of the blood pump 200.

[0056] Combined with Figure 4 , the two side walls 365 of the first hole groove 362 are symmetrically arranged with respect to the central plane P of the pump hole 360. The rotation axis l1 of the rotating member 331 is located on the central plane P. The blood pump 200 can only move along the central plane P in the first hole groove 362, and the centering effect of the blood pump 200 is better. Moreover, with the help of the first hole groove 362, the impeller 206 of the blood pump 200 can be coaxially connected to the rotating member 331 without axial alignment.

[0057] In this embodiment, the first hole groove 362 is integrally V-shaped; the second hole groove 361 is semi-circular. The width of the first end 363 of the first hole groove 362 is smaller than the opening width of the second hole groove 361. It should be noted that in other embodiments, each side wall 365 can be curved, and the clamping space 366 can also be tapered; the second hole groove 361 can also be semi-elliptical, square or other polygons.

[0058] In one embodiment, the positioning frame 340 is further provided with an auxiliary hole 367. The auxiliary hole 367 is opened on the positioning plate 342 and communicates with the second end 364 of the first hole groove 362. The setting of the auxiliary hole 367 is beneficial to the processing of the first hole groove 362 and reduces its processing difficulty. The auxiliary hole 367 is circular, but is not limited to this shape.

[0059] In one embodiment, the positioning device 320 further includes a locking member 350. The locking member 350 is installed on the positioning frame 340. One end of the locking member 350 is inserted into the pump hole 360 along the radial direction of the pump hole 360 through the outer side surface of the positioning frame 340. The locking member 350 can adjust the length of its insertion into the pump hole 360 to abut against the blood pump 200 installed in the pump hole 360. After the blood pump 200 is installed in the pump hole 360, the length of the locking member 350 inserted into the pump hole 360 is increased, so that one end of the locking member 350 located in the pump hole 360 abuts against the outer peripheral wall of the blood pump 200, thereby pressing the blood pump 200 tightly in the pump hole 360 and preventing the blood pump 200 from falling out of the pump hole 360. Conversely, reducing the length of the locking member 350 inserted into the pump hole 360 can loosen the blood pump 200, so that the blood pump 200 can be taken out of the pump hole 360.

[0060] Specifically, the locking member 350 includes a locking cap 351 and a locking shaft 352 connected to the locking cap 351; the locking cap 351 is located outside the positioning frame 340, and the locking shaft 352 passes through the outer side surface of the positioning frame 340 and is inserted into the second hole groove of the pump hole 360. The locking shaft 352 is threadedly connected to the positioning frame 340. By holding the locking cap 351 and rotating the locking member 350, the length of the locking shaft 352 of the locking member 350 inserted into the pump hole 360 can be adjusted, and further the tightness of the locking member 350 abutting against the blood pump 200 in the pump hole 360 can be adjusted.

[0061] As introduced above, in view of the positioning frame 340 including a positioning plate 342 and a mating plate 344 detachably connected to the positioning plate 342; the pump hole 360 includes a first hole groove 362 provided on the positioning plate 342 and a second hole groove 361 provided on the mating plate 344. Optionally, the locking member 350 is installed on the mating plate 344 of the positioning frame 340, and one end of the locking member 350 passes through the mating plate 344 and is inserted into the second hole groove 361 of the pump hole 360, and is opposite to the first hole groove 362 of the pump hole 360.

[0062] When the blood pump 200 is installed on the positioning device 320, after the blood pump 200 passes through the second hole groove 361 and is laterally moved into the first hole groove 362; then, the locking member 350 is adjusted to increase the length of the locking member 350 inserted into the second hole groove 361 of the pump hole 360, so that the locking member 350 presses the blood pump 200 tightly against the smallest diameter end of the first hole groove 362, greatly improving the stability of the blood pump 200 installed on the positioning device 320.

[0063] It is worth mentioning that in other embodiments, the positioning device 320 can also adopt a clamp-type fixing structure, which can be elastically opened or clamped to loosen or fasten the blood pump; the positioning device 320 can also adopt a clamping sleeve fixing structure, and the blood pump is loosened or fixed by adjusting the clamping distance between two relatively arranged clamping sleeves; the positioning device 320 can also adopt a buckle fixing structure, and the buckle fixing structure clamps or loosens the blood pump by moving the buckle to different positions.

[0064] Optionally, in order to reduce or avoid scratching of the blood pump 200 by the locking member 350, a flexible pad 353 is provided at one end of the locking member 350 extending into the pump hole 360. The flexible pad 353 avoids rigid contact between the locking member 350 and the blood pump 200, and plays a buffering and protecting role. The flexible pad 353 can be, but is not limited to, a silicone pad. It can be understood that in other embodiments, the locking member 350 is made of a plastic material and directly abuts against the blood pump 200, which can also reduce the damage to the blood pump 200.

[0065] Furthermore, a strip-shaped recess 354 is provided on the circumferential surface of the locking cap of the locking member 350. The strip-shaped recess 354 can increase the friction force, which is convenient for the user to lock or loosen the locking member 350.

[0066] Please refer to Figure 2 、 Figure 6 and Figure 7 In an embodiment, the rotating device 330 further includes a fixed table 332 fixedly installed on the base 311. The rotating member 331 of the rotating device 330 is rotatably installed on the fixed table 332, and a connecting shaft 333 for connecting the blood pump 200 is convexly provided on the upper surface of the rotating member 331.

[0067] Specifically, the connecting shaft 333 is connected to the impeller 206 of the blood pump 200. When the rotating member 331 is driven to rotate, the rotating member 331 drives the impeller 206 to rotate through the connecting shaft 333, so that the impeller 206 drives the rotor 202 of the blood pump 200 connected to the impeller 206 to rotate. Obviously, in other embodiments, the rotating member 331 may only include the rotating member 331, and the rotating member 331 is connected to the rotor 202 of the motor through a connecting tool, which can also drive the rotor 202 of the motor to rotate; or the rotating member 331 of the rotating member 331 is integrally formed with the connecting shaft 333, and the connecting shaft 333 can be directly connected to the rotating shaft of the motor to drive the rotor 202 to rotate, and the impeller 206 is installed on the rotating shaft after the test is completed.

[0068] Further, one of the fixed platform 332 and the rotating member 331 is provided with a mark (not shown), and the mark can mark the angle of rotation of the rotating member 331 relative to the fixed platform 332. The mark can be an angle scale line or an angle value. The rotation angle of the rotating member 331 is recorded by the mark, which is convenient for measuring the impedance and inductance of the rotor of the blood pump 200 after rotating through a certain angle, thereby obtaining the impedance and inductance of the motor within the rotation angle range. For example, the impedance and inductance of the rotating member 331 rotating 0-180° relative to the fixed platform 332 can be measured by the above-mentioned measurement method. In the present embodiment, the mark is set on the fixed platform 332. In other embodiments, the mark can also be set on the rotating member 331 to meet the purpose of being able to measure the rotation angle of the rotating member 331 relative to the fixed platform 332.

[0069] In order to facilitate the operation of the rotating member 331, a dial button 335 is provided on the side of the rotating member 331, and the operator can drive the rotating member 331 to rotate by dialing the dial button 335. It can be understood that in other embodiments, the rotation of the rotating member 331 of the rotating device 330 can be achieved by electronic control, for example, by driving the rotating member 331 to rotate by a motor.

[0070] In this embodiment, a fixing groove 336 is provided in the middle of the rotating member 331, and the connecting shaft 333 is inserted into the fixing groove 336 and tightly matched with the fixing groove 336. In other embodiments, the connecting shaft 333 can also be threadedly connected to the side wall of the fixing groove 336.

[0071] In this embodiment, the material of the connecting shaft 333 may be, but is not limited to, a flexible material such as foam or silicone to avoid damage to the impeller 206 of the blood pump 200. The tip of the impeller 206 is inserted into one end of the connecting shaft 333 by force to achieve the connection between the two. It is understandable that in other embodiments, the connecting shaft 333 may also be made of plastic to avoid scratching the impeller 206. A plug-in slot is provided at one end of the connecting shaft 333, and the tip of the impeller 206 is inserted into the plug-in slot to achieve the connection between the connecting shaft 333 and the impeller 206. Compared with the design of the connecting shaft 333 without a slot (it is necessary to insert the impeller 206 into the connecting shaft 333 with force, which causes greater damage to the impeller 206), the impeller 206 is plugged into the plug-in slot, and the impeller 206 can be matched with the plug-in slot without too much external force, thereby further reducing the damage to the blood pump 200.

[0072] In this embodiment, the fixed platform 332 is provided with a groove 337, and the rotating member 331 is provided with a boss 338 that cooperates with the groove 337. Through the cooperation between the boss 338 and the groove 337, the rotation of the rotating member 331 can be limited, so that the rotating member 331 can rotate stably relative to the fixed platform 332.

[0073] See also Figure 3 A third mounting groove 319 is also provided on the base 311 , and the fixing platform 332 is located in the third mounting groove 319 . The specific structure of the third mounting groove 319 refers to the first mounting groove 313 , and the third mounting groove 319 also serves as a pre-positioning fixing platform 332 .

[0074] Combination Figures 1 to 3 The test process of the blood pump test system 100 of this embodiment is as follows:

[0075] First, insert the blood pump 200 into the second hole groove 361 of the pump hole 360 ​​of the positioning frame 340, move the blood pump 200 laterally so that the blood pump 200 at least partially enters the first hole groove 362 of the pump hole 360, adjust the blood pump 200 up and down to a suitable position, and then rotate the locking member 350 to tightly press the blood pump 200 against the pump hole 360;

[0076] Next, the impeller 206 of the blood pump 200 is inserted into the upper end of the connecting shaft 333 of the rotating device 330, so that the rotating member 331 and the rotor 202 of the blood pump 200 are connected by transmission through the impeller 206;

[0077] Then, the test instrument 400 is electrically connected to the blood pump 200; the test instrument 400 is turned on, and the knob 335 of the rotating member 331 is turned to rotate the rotating member 331, so that the connecting shaft 333 of the rotating member 331 drives the impeller 206 to rotate, thereby driving the rotor 202 of the blood pump to rotate relative to the stator;

[0078] Finally, record the measurement data displayed by the test instrument 400 to obtain the test result.

[0079] In summary, for the blood pump test system 100 and the blood pump fixing tooling 300 provided by the present invention, the blood pump fixing tooling 300 includes a base frame 310, a rotating device 330 and a positioning device 320. The positioning device 320 is used to install the positioning frame 340 of the blood pump 200, which can move relative to the base frame 310, so as to adjust the rotation axis of the rotor 202 of the blood pump 200 to coincide with the rotation axis of the rotating member 331, enabling the rotor 202 of the blood pump 200 to rotate stably relative to the stator, and improving the accuracy of the test result of the blood pump 200. In addition, compared with the traditional fixing tooling with complex structure, the blood pump fixing tooling 300 of the present invention has a simple structure and is easy to operate, which is beneficial to improving the test efficiency.

[0080] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0081] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A blood pump fixing tooling, characterized in that, the blood pump fixing tooling includes: a base frame, the base frame includes a base and a bracket provided on the base; a rotating device, the rotating device is provided on the base, and the rotating device includes a rotating member capable of rotating relative to the base; and a positioning device, the positioning device includes a positioning frame and an adjusting member; wherein, the positioning frame is connected to the bracket and can move relative to the bracket, the positioning frame is provided with a pump hole, and the pump hole can supply the blood pump to pass through so that the rotor of the blood pump is in driving connection with the rotating member; the adjusting member connects the positioning frame and the bracket, and the adjusting member can adjust the movement of the positioning frame relative to the bracket, so that the rotation axis of the rotor of the blood pump installed on the positioning frame coincides with the rotation axis of the rotating member; the positioning device further includes a locking member installed on the positioning frame, one end of the locking member is inserted into the pump hole along the radial direction of the pump hole through the outer side surface of the positioning frame, and the locking member can adjust the length of its insertion into the pump hole to abut against the blood pump installed in the pump hole.

2. The blood pump fixing tooling according to claim 1, characterized in that, the positioning frame includes a positioning plate installed on the bracket and a mating plate detachably connected to the positioning plate; the pump hole includes a first hole groove provided on the positioning plate and a second hole groove provided on the mating plate.

3. The blood pump fixing tooling according to claim 2, characterized in that, the inner diameter of the second hole groove is larger than the outer diameter of the blood pump; the inner diameter of the first hole groove is gradually decreasing from the end close to the second hole groove towards the direction away from the second hole groove, so that the blood pump can be inserted through the second hole groove and laterally moved into the first hole groove to be in interference fit with the first hole groove.

4. The blood pump fixing tooling according to claim 2, characterized in that, the locking member is installed on the mating plate of the positioning frame, and one end of the locking member is inserted into the second hole groove of the pump hole and is opposite to the first hole groove of the pump hole.

5. The blood pump fixing tooling according to any one of claims 1 to 4, characterized in that, the positioning frame can translate relative to the bracket along the front and back direction of the rotating member.

6. The blood pump fixing tooling according to any one of claims 1 to 4, characterized in that, the positioning frame can translate relative to the bracket along the left and right direction of the rotating member.

7. The blood pump fixing tooling according to any one of claims 1 to 4, characterized in that, the bracket is provided on one side of the rotating device; the adjusting member is provided as an adjusting screw, the adjusting screw is connected to the positioning frame in a penetrating manner and passes through the positioning frame to be threadedly connected to the bracket.

8. The blood pump fixing tooling according to claim 7, characterized in that, the number of the adjusting screws is at least two, and at least two of the adjusting screws are arranged at intervals along the width direction of the positioning frame.

9. The blood pump fixing tooling according to any one of claims 1 to 4, characterized in that, The rotating device further includes a fixed platform fixedly mounted on the base; the rotating member is rotatably mounted on the fixed platform, and a connecting shaft for connecting the blood pump is convexly provided on the upper surface of the rotating member.

10. A blood pump testing system, characterized in that the blood pump testing system includes: a testing instrument; and a blood pump fixing tooling as described in any one of claims 1 to 9, and the testing instrument can be electrically connected to the blood pump mounted on the blood pump fixing tooling to measure the impedance and inductive reactance of the blood pump.

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