Blood pump assembly tool and blood pump assembly method

Abstract

This invention relates to a blood pump assembly fixture and a blood pump assembly method. The blood pump assembly fixture includes a base, a fixing mechanism, and an adjusting mechanism. The base has a blood pump mounting portion with a mounting port for the blood pump's rotating shaft and end cap assembly to extend from. The fixing mechanism is disposed on the base and can press the blood pump against the blood pump mounting portion. The adjusting mechanism includes an adjusting component and a pushing component, both of which are disposed on the base. The pushing component is located between the blood pump mounting portion and the adjusting component. The pushing component has a first end that can abut against the end cap assembly and a second end that can abut against the rotating shaft. The adjusting component can drive the pushing component to move towards the mounting port, so that the first end abuts against the end cap assembly and the second end abuts against the rotating shaft. This configuration can improve the assembly efficiency of the blood pump.

Description

Technical Field

[0001] This invention relates to the field of mechanical tooling technology, and in particular to a blood pump assembly tooling and a blood pump assembly method. Background Technology

[0002] An intravascular blood pump is a blood-pumping device that can be inserted into a patient's heart through a blood vessel. The pump is placed inside the opening of the heart valve, allowing blood to flow through the pump and into the artery. Traditional blood pumps have a complex assembly process, resulting in low assembly efficiency. Summary of the Invention

[0003] One technical problem addressed by this invention is how to improve the assembly efficiency of blood pumps; this invention solves the above-mentioned technical problem through the following technical solutions.

[0004] In a first aspect, the present invention provides a blood pump assembly fixture, comprising:

[0005] The base is provided with a blood pump mounting part, which has a mounting port for the blood pump shaft and the end cap assembly to extend out.

[0006] A fixing mechanism, wherein the fixing mechanism is disposed on the base and is capable of pressing the blood pump against the blood pump mounting part; and

[0007] An adjustment mechanism is provided, comprising an adjustment component and a pusher, both disposed on the base, with the pusher located between the blood pump mounting portion and the adjustment component. The pusher has a first end capable of abutting against the end cap assembly and a second end capable of abutting against the rotating shaft. The adjustment component can drive the pusher to move toward the mounting port, so that the first end abuts against the end cap assembly and the second end abuts against the rotating shaft.

[0008] In one embodiment, the pusher is detachably mounted on the base and is movable relative to the base toward the mounting port, the first end and the second end being located at opposite ends of the pusher, and the adjustment assembly being selectively abutting against the first end or the second end.

[0009] In one embodiment, the first end has a clearance hole extending along the moving direction of the pusher, the clearance hole being adapted to accommodate the rotating shaft.

[0010] In one embodiment, the base is provided with a first groove, the bottom surface of the first groove being adapted to contact the pusher member, and the blood pump mounting part is also provided with a second groove, the second groove penetrating the end of the base toward the adjustment mechanism to form the mounting opening, the bottom surface of the second groove being adapted to contact the outer peripheral surface of the blood pump, the first groove and the second groove being arranged along the moving direction of the pusher member, and along the moving direction of the pusher member, the bottom surfaces of the first groove and the second groove are coplanar.

[0011] In one embodiment, the blood pump assembly fixture further includes an elastic pressing mechanism disposed on the base and adapted to elastically abut against the fixing components of the blood pump.

[0012] In one embodiment, the elastic pressing mechanism includes a sleeve component, a pressing component, and an elastic element. The sleeve component is fixed on the base, the pressing component is slidably inserted through the sleeve component and presses against the fixed connection component, and the elastic element abuts between the sleeve component and the pressing component.

[0013] In one embodiment, the sleeve assembly includes an outer sleeve and an inner sleeve. The outer sleeve has a first through hole, and the inner sleeve is received in the first through hole and threadedly connected to the outer sleeve. The inner sleeve has a second through hole coaxially arranged with the first through hole, and the pressing assembly is slidably inserted through the first through hole and the second through hole.

[0014] Secondly, the present invention also provides a blood pump assembly method, wherein the blood pump is assembled using any of the above-mentioned blood pump assembly fixtures. The blood pump includes a stator assembly, a rotor assembly, and an end cap assembly. The end cap assembly is disposed at one end of the stator assembly. The rotor assembly includes a rotor and a rotating shaft connected together. The rotating shaft passes through the stator assembly and the end cap assembly. The rotor is disposed at one end of the stator assembly. The first stator of the blood pump is in contact with the first rotor of the blood pump, and the second stator of the blood pump has a basic distance from the second rotor of the blood pump. The blood pump assembly method includes the following steps:

[0015] Secure the stator assembly to the base;

[0016] Adjusting the adjustment component causes the pusher to press against the end cover assembly. When the end cover assembly presses against the second rotor, continue adjusting the adjustment component so that the first rotor moves away from the contact position from the first stator by a first distance.

[0017] Secure the end cap assembly to the stator assembly;

[0018] Rotate the pusher so that it presses against the shaft of the blood pump;

[0019] Adjusting the adjusting component drives the pushing member to move, so that the second rotor moves a second distance from the position in contact with the end cap assembly, the sum of the first distance and the second distance being less than the base spacing.

[0020] In one embodiment, the blood pump further includes a fixing component disposed at the other end of the stator assembly, and the blood pump assembly fixture further includes an elastic pressing mechanism. After fixing the stator assembly to the base, the method further includes: pressing the elastic pressing mechanism against the fixing component axially.

[0021] In one embodiment, after the adjusting component moves the pusher, the blood pump assembly method further includes fixing the fixing component and the stator component.

[0022] Compared to existing technologies, the blood pump assembly fixture and method provided by this invention have a mounting port on the base for the blood pump shaft and end cap assembly to extend from. A fixing mechanism on the base can press the blood pump against the blood pump mounting port. The pusher of the adjustment mechanism has a first end that can abut against the end cap assembly and a second end that can abut against the shaft. The adjustment mechanism drives the pusher to move closer to the mounting port, so that the first end abuts against the end cap assembly. This causes the end cap assembly to push the rotor to move away from the stator, thereby adjusting the distance between the stator and rotor of the blood pump. The adjustment mechanism also drives the pusher to move closer to the mounting port, so that the second end abuts against the shaft. This causes the shaft to drive the rotor to move away from the end cap assembly, thereby adjusting the distance between the rotor and end cap assembly of the blood pump, which facilitates the subsequent assembly of the blood pump into an integral structure. Compared to the traditional method of placing gaskets of the same thickness as the aforementioned spacing between the stator and rotor, and between the rotor and the end cap assembly, before assembling the blood pump, this method avoids the need to install the gaskets before assembly and remove them after assembly. By adjusting the component to move the pusher towards the mounting port, the spacing between the stator and rotor, as well as the spacing between the rotor and the end cap assembly, can be adjusted. This achieves rapid adjustment of the spacing between the stator and rotor, and between the rotor and the end cap assembly, thereby improving the assembly efficiency of the blood pump. Attached Figure Description

[0023] Figure 1 This is a planar sectional view of the blood pump;

[0024] Figure 2 A perspective view of a blood pump assembly fixture (including a blood pump) provided in an embodiment of the present invention;

[0025] Figure 3 for Figure 2The exploded view of the blood pump assembly tooling shown.

[0026] Figure 4 for Figure 3 A magnified view of a portion at point A;

[0027] Figure 5 for Figure 2 A three-dimensional view of the elastic pressing mechanism of the blood pump assembly tooling shown;

[0028] Figure 6 for Figure 5 A planar sectional view of the elastic pressing mechanism shown;

[0029] Figure 7 for Figure 2 A planar sectional view of the pusher component of the blood pump assembly tooling shown.

[0030] Figure 8 for Figure 2 A top view of the blood pump assembly fixture (including the blood pump) shown;

[0031] Figure 9 for Figure 8 A sectional view along the XX direction;

[0032] Figure 10 for Figure 9 A magnified view of the area at point B;

[0033] Figure 11 A flowchart illustrating the process flow of the blood pump assembly method provided in this embodiment of the invention. Detailed Implementation

[0034] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "inner," "outer," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0036] The inventors of this application discovered that in the traditional assembly method of blood pumps, during the assembly process, gaskets of a certain thickness are usually placed between the stator and rotor, and between the rotor and the end cover assembly. After the blood pump is assembled into a whole structure, the gaskets are removed from the blood pump, thus completing the assembly. However, the installation and removal of gaskets increases the assembly difficulty of the blood pump and reduces its assembly efficiency. Furthermore, when the gaskets are not installed properly, such as due to folding or tilting, the distance between the stator and rotor, and between the rotor and the end cover assembly, will be inaccurate, requiring the gaskets to be reinstalled, resulting in low assembly efficiency of the blood pump.

[0037] To address at least some of the aforementioned problems, this application proposes a blood pump assembly fixture and a blood pump assembly method. This assembly fixture, through an adjusting component, moves a pusher towards the mounting port, thereby adjusting the distance between the stator and rotor, and between the rotor and the end cover assembly. This avoids the need for installing gaskets before assembly and removing them after assembly, enabling rapid adjustment of the distance between the stator and rotor, and between the rotor and the end cover assembly, thus improving the assembly efficiency of the blood pump. The following detailed description of the blood pump assembly fixture and method provided in this application, in conjunction with specific embodiments and accompanying drawings, provides a detailed explanation.

[0038] See Figure 1 The blood pump 11 mainly includes a stator assembly 110, a rotor assembly 120, a fixing assembly 130, and an end cap assembly 140. The end cap assembly 140 is disposed at one end of the stator assembly 110, and the fixing assembly 130 is disposed at the other end of the stator assembly 110. The stator assembly 110 includes a housing 111 and two stators 112 located inside the housing 111. The rotor assembly 120 includes a connected shaft 121 and a rotor 122, wherein the shaft 121 passes through the stator assembly 110 and the end cap assembly 140, and the rotor 122 is disposed at one end of the stator assembly 110. In this embodiment, there are two rotors 122, with the two stators 112 located between the two rotors 122. The two stators 112 are respectively referred to as the first stator 1121 and the second stator 1122, and the two rotors 122 are respectively referred to as the first rotor 1221 and the second rotor 1222. The first rotor 1221 is disposed near the first stator 1121 and the fixing assembly 130, and the second rotor 1222 is disposed near the second stator 1122 and the end cover assembly 140. Both the first stator 1121 and the second stator 1122 are fixed within the housing 111. A rotating shaft 121 is rotatably inserted through the first stator 1121 and the second stator 1122. The first rotor 1221 and the second rotor 1222 are respectively fixedly connected to the rotating shaft 121. When the stator 112 drives the rotor 122 to rotate, the rotating shaft 121 will rotate synchronously around its axis, following the rotation of the rotor 122.

[0039] The fixing assembly 130 includes a ball bearing 131 and a fixing seat 132. The ball bearing 131 is fixedly mounted on the fixing seat 132, and the fixing seat 132 can be fixedly connected to one end of the housing 111. The rotating shaft 121 is inserted into the ball bearing 131, allowing the rotating shaft 121 to rotate relative to the ball bearing 131. The end cap assembly 140 includes a support bearing 141 and an end cap 142. The support bearing 141 is fixedly mounted on the end cap 142, and the end cap 142 can be fixedly connected to the other end of the housing 111. The rotating shaft 121 passes through the support bearing 141, with the end of the rotating shaft 121 away from the fixing assembly 130 located outside the support bearing 141, allowing the rotating shaft 121 to rotate relative to the support bearing 141.

[0040] During assembly, the first stator 1121, the second stator 1122, and the housing 111 can be fixed to form an integral stator assembly 110. A rotating shaft 121 passes through the first stator 1121 and the second stator 1122, and the first rotor 1221 and the second rotor 1222 are fixed to the rotating shaft 121, thus forming an integral rotor assembly 120. A ball bearing 131 and a mounting base 132 are fixedly connected, forming an integral mounting assembly 130. The mounting assembly 130 can be slidably fitted onto the housing 111 from the end near the first rotor 1221. The support bearing 141 and the end cap 142 are fixedly connected, so that the end cap assembly 140 forms an integral end cap assembly 140. The end cap assembly 140 can be slidably fitted onto the housing 111 from the end near the second rotor 1222. The rotating shaft 121 passes through the support bearing 141 and its end is exposed outside the support bearing 141. When a force along the blood pump axial direction is applied to the end of the rotating shaft 121 exposed outside the support bearing 141, the rotating shaft 121 can slide relative to the support bearing 141, the first stator 1121 and the second stator 1122, and the rotating shaft 121 can push the entire fixed assembly 130 to slide relative to the housing 111. When a force along the blood pump axial direction is applied to the support bearing 141, the entire end cap assembly 140 can slide relative to the housing 111. Of course, the end cap assembly 140 can also slide relative to the rotating shaft 121. After assembly, both the end cap 142 and the fixing base 132 must be fixed to the housing 111.

[0041] See Figure 1 and Figure 2 The blood pump assembly fixture 12 provided in this embodiment of the invention is used to assemble the blood pump 11 described above. The blood pump assembly fixture 12 includes a base 200, a fixing mechanism 400, and an adjusting mechanism 500. Both the fixing mechanism 400 and the adjusting mechanism 500 are disposed on the base 200.

[0042] See Figure 2and Figure 3 In some embodiments, the base 200 includes a first boss 210, a second boss 220, a third boss 230, a fixed boss 240, a base plate 250, a side plate 260, a pressure plate 270, and a limiting plate 280. The side plate 260, the first boss 210, the second boss 220, the third boss 230, and the fixed boss 240 all protrude from the same surface in the thickness direction of the base plate 250. The third boss 230 and the side plate 260 are located at opposite ends in the length direction of the base plate 250. The first boss 210 and the second boss 220 are both located between the third boss 230 and the side plate 260, such that the side plate 260, the first boss 210, the second boss 220, and the third boss 230 are sequentially spaced along the length direction of the base plate 250. The fixed boss 240 and the second boss 220 are spaced along the width direction of the base plate 250. A mounting hole 261 can be provided on the side plate 260. The mounting hole 261 extends through the entire side plate 260 along the thickness direction. The adjustment mechanism 500 can be installed in the mounting hole 261.

[0043] A first groove 211 is formed on the first boss 210, which is recessed to a certain depth from the surface of the first boss 210 away from the base plate 250. The first groove 211 can be a V-shaped groove. The first groove 211 extends along the length of the base plate 250 and is used to cooperate with the adjustment mechanism 500. A first relief groove 212 can also be formed on the bottom of the first groove 211, which is recessed to a certain depth from the bottom of the first groove 211. The first relief groove 212 can be a rectangular groove, such that the cross-section of the connection between the first groove 211 and the first relief groove 212 is equal to the cross-section of the first relief groove 212, and the cross-section of other parts of the first groove 211 is larger than the cross-section of the first relief groove 212. Therefore, the cross-section of the first relief groove 212 is less than or equal to the cross-section of the first groove 211.

[0044] Please refer to the following: Figure 4 The second boss 220 is provided with a blood pump mounting part 223, which is used to mount the blood pump 11. The blood pump mounting part 223 has a mounting port 2231 for the shaft 121 of the blood pump 11 and the end cap assembly 140 to extend outward from the mounting port 2231.

[0045] The blood pump mounting part 223 also has a second groove 221. The first groove 211 and the second groove 221 are arranged along the length direction of the blood pump 11. The second groove 221 penetrates the end of the base 200 facing the adjustment mechanism 500 to form a mounting opening 2231. The second groove 221 is formed by a certain depth of surface recesses between the second boss 220 and the base plate 250, and the second groove 221 can be spaced a certain distance from the base plate 250 along the thickness direction. The shape of the second groove 221 is approximately the same as that of the first groove 211, that is, the second groove 2211 can be a V-shaped groove. The second groove 221 extends along the length direction of the base plate 250, and the bottom surface of the second groove 221 is adapted to fit and contact the outer peripheral surface of the blood pump 11. A second retraction groove 222 can also be formed on the bottom of the second groove 221, and the shape of the second retraction groove 222 is approximately the same as that of the first retraction groove 212.

[0046] A third groove 231 is formed on the third boss 230. The third groove 231 is formed by a certain depth of surface recesses between the third boss 230 and the base plate 250, and the third groove 231 can be spaced a certain distance from the base plate 250 along the thickness direction. The shape of the third groove 231 is approximately the same as that of the first groove 211, that is, the third groove 231 can be a V-shaped groove. The third groove 231 extends along the length direction of the base plate 250. A third relief groove 232 can also be formed on the bottom of the third groove 231, and the shape of the third relief groove 232 is approximately the same as that of the first relief groove 212.

[0047] The first groove 211, the second groove 221 and the third groove 231 can be arranged at intervals on the same straight line extending along the length direction of the base plate 250. The bottom surfaces of the first groove 211 and the second groove 221 can be coplanar, so that the first groove 211 and the second groove 221 can be processed in one go, thereby improving the processing efficiency. For example, the first groove 211 and the second groove 221 can be formed by milling or cutting in one go.

[0048] Of course, the bottom surfaces of the first groove 211 and the third groove 231 can also be coplanar, that is, the first groove 211, the second groove 221 and the third groove 231 can be spaced apart along the axial direction of the blood pump 11 to ensure that the forces exerted on the blood pump 11 by the elastic pressing mechanism 300 and the adjusting mechanism 500 are on the same straight line, thereby accurately adjusting the distance between the stator 112 and the rotor 122 and the distance between the rotor 122 and the end cover assembly 140, thereby improving the assembly accuracy of the blood pump 11. When the housing 111 of the blood pump 11 is fixed on the second groove 221, the axis of the blood pump 11 extends along the length direction of the base plate 250, and the first groove 211, the second groove 221 and the third groove 231 can also be understood as being arranged sequentially along the axial direction of the blood pump 11. The first relief groove 212, the second relief groove 222 and the third relief groove 232 can also be spaced apart and arranged on the same straight line extending along the length direction of the base plate 250.

[0049] In this embodiment, the blood pump assembly fixture 12 may further include an elastic pressing mechanism 300, which is disposed on the base 200 and is adapted to elastically abut against the fixing component 130 of the blood pump 11.

[0050] The pressure plate 270 can extend along the width direction of the base plate 250. The pressure plate 270 can be fixed to the third boss 230 via a detachable connection such as bolts. The pressure plate 270 can cover the third groove 231. When the part on the elastic pressing mechanism 300 engages with the third groove 231, the pressure plate 270 is fixed to the third boss 230. The pressure plate 270 applies a force to the part on the elastic pressing mechanism 300, clamping it between the pressure plate 270 and the third boss 230, preventing the clamped part from sliding within the third groove 231 along the length direction of the base plate 250. Clearly, the pressure plate 270 and the third groove 231 engage to limit the elastic pressing mechanism 300 along the thickness direction of the base plate 250.

[0051] The limiting plate 280 can also extend along the width direction of the base plate 250. The limiting plate 280 can be fixed to the first boss 210 by a detachable connection such as bolts. The limiting plate 280 can cover the first groove 211. When the part on the adjusting mechanism 500 is engaged with the first groove 211, the limiting plate 280 is fixed to the first boss 210. The limiting plate 280 and the first groove 211 engage to limit the part on the adjusting mechanism 500 along the thickness direction of the base plate 250. However, the limiting plate 280 does not apply pressure to the part on the adjusting mechanism 500 to prevent the part on the adjusting mechanism 500 from being clamped between the first boss 210 and the limiting plate 280, so that the part on the adjusting mechanism 500 can slide in the first groove 211 along the length direction of the base plate 250.

[0052] The fixing mechanism 400 can be fixed to the fixing boss 240 by a detachable connection such as bolts. The fixing mechanism 400 can press the blood pump against the blood pump mounting part. The fixing mechanism 400 can be an elbow clamp or the like. When the housing 111 of the blood pump 11 is engaged with the second groove 221, the pressure head 410 of the fixing mechanism 400 can cover the second groove 221. The pressure head 410 applies pressure to the housing 111, and the housing 111 is clamped between the second boss 220 and the pressure head 410, so that the housing 111 cannot slide in the second groove 221 along the length direction of the base plate 250.

[0053] See Figure 3 , Figure 5 and Figure 6 In some embodiments, the elastic pressing mechanism 300 includes a sleeve assembly 310, a pressing assembly 320, and an elastic element 330. The sleeve assembly 310 is fixed to the base 200. For example, the sleeve assembly 310 includes an inner sleeve 312 and an outer sleeve 311. The outer sleeve 311 engages with a first groove 211, which limits the outer sleeve 311 along the width direction of the base plate 250. The outer sleeve 311 is clamped between the pressure plate 270 and the third boss 230, preventing it from sliding along the length direction of the base plate 250. The outer sleeve 311 has a first through hole 3111, which axially extends through the entire outer sleeve 311. An internal thread can be formed in the first through hole 3111, and an external thread can be formed on the inner sleeve 312. The inner sleeve 312 can be gradually screwed in and received in the first through hole 3111, thus threading the outer sleeve 311 and the inner sleeve 312 together. The inner sleeve 312 has a second through hole 3121. The second through hole 3121 extends through the entire inner sleeve 312 along the axial direction. Obviously, the diameter of the second through hole 3121 is smaller than the diameter of the first through hole 3111. The first through hole 3111 and the second through hole 3121 can be coaxially arranged to form a stepped hole together.

[0054] The pressing assembly 320 includes a pressing rod 321 and a sleeve 322 coaxially arranged. The end of the pressing rod 321 is inserted into the sleeve 322, thereby fixing the sleeve 322 onto the pressing rod 321. The pressing rod 321 passes through both the first through hole 3111 and the second through hole 3121. Specifically, the pressing rod 321 includes a thicker section 3211 with a larger cross-section and a thinner section 3212 with a smaller cross-section. The thicker section 3211 and the thinner section 3212 are connected. The thicker section 3211 is slidably engaged with the first through hole 3111, and the thinner section 3212 is slidably engaged with the second through hole 3121, so that the entire pressing rod 321 slides along the length direction of the base plate 250 in the first through hole 3111 and the second through hole 3121. During the sliding process of the thick section 3211 of the pressure rod 321 near the inner sleeve 312, when the thick section 3211 presses against the inner sleeve 312, the thick section 3211 and the entire pressure rod 321 stop moving. Therefore, the inner sleeve 312 can limit the sliding stroke of the pressure rod 321.

[0055] The socket 322 is used to abut against the end of the fixed seat 132 along the length of the base plate 250 (i.e., the axial direction of the blood pump 11). Since the socket 322 is in direct contact with the fixed seat 132, the hardness of the socket 322 can be less than that of the pressure rod 321, preventing damage to the fixed seat 132 from the impact force of the socket 322. The elastic element 330 can be a spring, sleeved on the thinner section 3212 of the pressure rod 321. One end of the elastic element 330 abuts against the inner sleeve 312, and the other end abuts against the socket 322. When the socket 322 presses against the fixed seat 132, the elastic element 330 is compressed and stores energy, allowing the thicker section 3211 of the pressure rod 321 to move away from the inner sleeve 312, maintaining a certain distance between the thicker section 3211 and the inner sleeve 312. Through the action of the elastic element 330, a certain force is generated between the sleeve 322 and the fixed seat 132. The entire fixed assembly 130 applies a thrust to the first rotor 1221 through the rotating shaft 121, so that the first rotor 1221 abuts against the first stator 1121, and the second rotor 1222 and the second stator 1122 are spaced apart from each other with a basic distance.

[0056] In other embodiments, the sleeve assembly 310 can be an integral structure, so that the inner sleeve 312 and the outer sleeve 311 are integrally connected. The pressing assembly 320 can also be an integral structure, so that the pressing rod 321 and the sleeve joint 322 are integrally connected.

[0057] See Figure 2 and Figure 3In some embodiments, the adjustment mechanism 500 can be a micrometer. The adjustment mechanism 500 includes an adjustment component 510 and a pusher component 530, both of which are disposed on the base 200, with the pusher component 530 located between the blood pump mounting portion and the adjustment component 510. The adjustment component 510 is disposed on the side plate 260, with a portion of the adjustment component 510 passing through the mounting hole 261 of the side plate 260. Additionally, the adjustment mechanism 500 also includes an adapter 520. The adapter 520 and the pusher component 530 are disposed relatively independently and are not directly connected, allowing them to be handled and stored separately. The adapter 520 is fixedly connected to the adjustment component 510. During operation of the adjustment component 510, the adjustment component 510 can drive the adapter 520 to slide along the length of the base plate 250. The sliding distance of the adapter 520 can be read by adjusting the scale on the component 510 or by adjusting the electronic digital display on the display screen of the component 510, thereby accurately controlling the moving distance of the pusher 530, thereby adjusting the distance between the stator 112 and the rotor 122 and the distance between the rotor 122 and the end cap assembly 140, and improving the assembly accuracy of the blood pump 11.

[0058] The adjustment component 510 can be inserted into the adapter 520, which is used to abut against the pusher 530. The hardness of the adapter 520 can be less than that of the adjustment component 510, so the adapter 520 can absorb impact energy and play a certain buffering role, avoiding a large impact when the adapter 520 and the pusher 530 come into contact.

[0059] See Figure 3 and Figure 7 The pusher 530 engages with the first groove 211. For example, the pusher 530 is adapted to contact the bottom surface of the first groove 211. Since the limiting plate 280 does not press the pusher 530 tightly, the pusher 530 can slide along the length direction of the base plate 250 in the first groove 211. The pusher 530 is detachably mounted on the base 200 and can move relative to the base 200 toward the mounting opening 2231. The direction of movement of the pusher 530 is the same as the length direction of the blood pump 11.

[0060] The pusher 530 has a first end 531 and a second end 532. The adjusting component 510 can selectively abut against the first end 531 or the second end 532. The first end 531 can abut against the end cap assembly 140, and the second end 532 can abut against the rotating shaft 121. The adjusting component 510 can drive the pusher 530 to move towards the mounting port 2231, so that the first end 531 abuts against the end cap assembly 140, thereby adjusting the distance between the stator 112 and the rotor 122 of the blood pump 11, and so that the second end 532 abuts against the rotating shaft 121, thereby adjusting the distance between the rotor 122 and the end cap assembly 140 of the blood pump 11, which facilitates the subsequent assembly of the blood pump 11 into an integral structure. Furthermore, compared to the traditional method of placing a gasket of the same thickness as the aforementioned spacing between the stator 112 and the rotor 122, and between the rotor 122 and the end cap assembly 140, this method avoids the installation and removal of the gasket. By adjusting the component 510 to drive the pusher 530 to move towards the mounting port 2231, the spacing between the stator 112 and the rotor 122, as well as the spacing between the rotor 122 and the end cap assembly 140, can be adjusted. This achieves rapid adjustment of the spacing between the stator 112 and the rotor 122, and the spacing between the rotor 122 and the end cap assembly 140, thereby improving the assembly efficiency of the blood pump 11.

[0061] In this embodiment, the first end 531 and the second end 532 are located at opposite ends of the push member 530, that is, the first end 531 and the second end 532 are two ends spaced apart along the axial direction of the push member 530 and facing opposite directions. In other embodiments, the first end 531 and the second end 532 are two ends on the push member 530 facing the same direction. For example, the push member 530 is rotatably disposed on the first boss 210. When the push member 530 rotates to a certain angle, the first end 531 abuts against the end cap assembly 140; when the push member 530 rotates to another angle, the second end 532 can abut against the rotating shaft 121.

[0062] In this embodiment, a recessed clearance hole 533 is formed on the first end 531. The clearance hole 533 extends a certain length along the moving direction of the push member 530, and the center line of the clearance hole 533 can coincide with the axis of the push member 530. By providing the clearance hole 533, when the first end 531 abuts against the support bearing 141, the rotating shaft 121 will pass through the clearance hole 533, which can prevent the push member 530 from generating an axial thrust on the rotating shaft 121. Furthermore, by making the push member 530 approximately cylindrical, the contact area between the push member 530 and the end cap assembly 140 can be increased, reducing damage to the end cap assembly 140. In other embodiments, the first end 531 may not have a clearance hole. For example, two push members 530 may be provided, with the gap between the two push members 530 forming a clearance space. As another example, the push member 530 may also be semi-cylindrical, which can also avoid the rotating shaft 121.

[0063] See Figures 7 to 10 The pusher 530 has two mating states in the first groove 211, referred to as the first state and the second state. In the first state, the first end 531 of the pusher 530 is positioned near the support bearing 141 and can abut against the support bearing 141, while the second end 532 is positioned near the adapter 520 and can abut against the adapter 520. In the second state, the second end 532 of the pusher 530 is positioned near the support bearing 141 and can abut against the rotating shaft 121, while the first end 531 is positioned near the adapter 520 and can abut against the adapter 520. In fact, for the pusher 530 in the first state, the limiting plate 280 can be removed from the first boss 210, and then the pusher 530 can be taken out of the third groove 231 and rotated 180°. Then, the pusher 530 after being rotated 180° can be re-engaged with the second groove 221. At this time, the pusher 530 will be in the second state. Therefore, by rotating the pusher 530 back and forth by 180°, the pusher 530 can be switched between the first state and the second state.

[0064] In the first state, the first end 531 of the pusher 530 abuts against the support bearing 141, and the second end 532 abuts against the adapter 520. The rotating shaft 121 passes through the clearance hole 533, the diameter of which is larger than the outer diameter of the rotating shaft 121, resulting in a large gap between them. When the adapter 520 applies force to the second end 532 of the pusher 530, the first end 531 of the pusher 530 will push the support bearing 141 to move, causing the support bearing 141 to abut against the second rotor 1222. The support bearing 141 and the second rotor 1222 will move synchronously closer to the second stator 1122. Through the linkage of the rotating shaft 121, the fixing assembly 130 and the first rotor 1221 will move away from the first stator 1121. As the support bearing 141 moves closer to the second stator 1122, the pusher 530 will be unable to apply axial thrust to the rotating shaft 121 through the action of the clearance hole 533, so that the rotating shaft 121 cannot slide relative to the support bearing 141. Therefore, the rotating shaft 121 and the support bearing 141 will slide synchronously.

[0065] In the second state, the first end 531 of the pusher 530 abuts against the adapter 520, and the second end 532 abuts against the rotating shaft 121. When the adapter 520 applies a force to the first end 531 of the pusher 530, the pusher 530 will push the rotating shaft 121 to slide relative to the support bearing 141, thereby causing the second rotor 1222 to move closer to the second stator 1122 and away from the support bearing 141.

[0066] See Figure 1In the design of the blood pump 11, to reduce wear on the rotor 122 during rotation, a gap can be maintained between the rotor 122 and the stator 112, and a gap can also exist between the rotor 122 and the support bearing 141 and the ball bearing 131. For ease of description, the gap between the stator 112 and the rotor 122 is denoted as the air gap. Therefore, the air gap between the first stator 1121 and the first rotor 1221 is denoted as the first air gap E, and the air gap between the second rotor 1222 and the second stator 1122 is denoted as the second air gap F. Since the rotating shaft 121 is inserted into the ball bearing 131, the limiting effect of the rotating shaft 121 ensures that there is always a gap between the first rotor 1221 and the ball bearing 131 during the assembly of the blood pump 11. Therefore, after the blood pump 11 is assembled, a gap also exists between the first rotor 1221 and the ball bearing 131. However, during the assembly process, the second rotor 1222 and the support bearing 141 are in contact. Therefore, before the assembly is completed, the contact between the two must be eliminated so that there is a gap between them. For the sake of convenience, after the blood pump 11 is assembled, the gap between the second rotor 1222 and the support bearing 141 is denoted as clearance H.

[0067] In summary, the blood pump assembly fixture 12 provided by the present invention includes a base 200, a fixing mechanism 400, and an adjusting mechanism 500. The blood pump mounting portion 223 of the base 200 has a mounting port 2231 for the rotating shaft 121 of the blood pump 11 and the end cap assembly 140 to extend out. The fixing mechanism 400 disposed on the base 200 can press the blood pump 11 against the blood pump mounting portion 223. The pusher 530 of the adjusting mechanism 500 has a first end 531 that can abut against the end cap assembly 140 and a second end 52 that can abut against the rotating shaft 121. The adjusting mechanism 510 drives the pusher 530 towards the mounting port 2231. The movement of 31 causes the first end 531 to abut against the end cap assembly 140, thereby pushing the rotor 122 away from the stator 112 to adjust the distance between the stator 112 and the rotor 122 of the blood pump 11. The adjustment assembly 510 drives the pusher 530 to move closer to the mounting port 2231, which also causes the second end 52 to abut against the rotating shaft 121. This causes the rotating shaft 121 to drive the rotor 122 away from the end cap assembly 140 to adjust the distance between the rotor 122 and the end cap assembly 140 of the blood pump 11, making it easier to assemble the blood pump 11 into an integral structure. Compared to the traditional method of placing a shim of the same thickness as the aforementioned spacing between the stator 112 and the rotor 122, and between the rotor 122 and the end cap assembly 140, this method avoids the installation and removal of the shim. By adjusting the component 510 to drive the pusher 530 to move closer to the mounting port 2231, the spacing between the stator 112 and the rotor 122, as well as the spacing between the rotor 122 and the end cap assembly 140, can be adjusted. This achieves rapid and precise adjustment of the spacing between the stator 112 and the rotor 122, and between the rotor 122 and the end cap assembly 140, thereby improving the assembly efficiency of the blood pump 11.

[0068] See Figure 11 The present invention also provides a blood pump assembly method, wherein the blood pump 11 is assembled using the aforementioned blood pump assembly fixture 12, and the blood pump assembly method includes:

[0069] S610, fixing stator assembly 110 to base 200.

[0070] Specifically, the housing 111 is engaged with the second groove 221, and then the pressure head 410 of the fixing mechanism 400 applies pressure to the housing 111, clamping the housing 111 between the pressure head 410 and the second boss 220. The housing 111 cannot slide or rotate relative to the second boss 220, thus fixing the housing 111. Of course, before fixing the housing 111 to the base 200, the first stator 1121 is in contact with the first rotor 1221, and the second stator 1122 and the second rotor 1222 are spaced apart by a basic distance.

[0071] After fixing the stator assembly 110 to the base 200, the blood pump assembly method further includes: pressing the elastic pressing mechanism 300 against the fixing assembly 130 axially to continue to maintain the first stator 1121 pressing against the first rotor 1121, and the second stator 1122 and the second rotor 1222 having a basic distance.

[0072] Specifically, the housing 111 is sleeved on the fixing component 130, and the fixing component 130 can be slidably connected to the housing 111. This causes the sleeve 322 to press against the fixing seat 132. Under the action of the elastic element 330, the sleeve 322 presses against the fixing component 130, causing the fixing component 130 to press against the first rotor 1221 via the rotating shaft 121, thereby generating a certain force between the first rotor 1221 and the first stator 1121. At this time, the first rotor 1221 and the first stator 1121 continue to maintain contact with each other with zero gap, while a basic distance continues to exist between the second rotor 1222 and the second stator 1122. The value of this basic distance ranges from 0.35 to 0.45 mm, and the specific value of the basic distance can be 0.35 mm, 0.4 mm, or 0.45 mm, etc. In other embodiments, step S611 can also be omitted, that is, it is not necessary to maintain the base spacing and the pressing relationship between the first rotor 1221 and the first stator 1121 through the elastic pressing mechanism 300.

[0073] S620, the adjusting component 510 drives the pusher 530 to press against the end cover assembly 140. When the end cover assembly 140 presses against the second rotor 1122, the adjusting component 510 is adjusted again to make the first rotor 1221 move away from the contact position from the first stator 1121 by a first distance.

[0074] Specifically, the end cap 142 is fitted over the housing 111, and the rotating shaft 121 passes through the support bearing 141. With the pusher 530 in its first state, the adjusting assembly 510 is operated, causing the adapter 520 to abut against the second end 532 of the pusher 530. This causes the pusher 530 to slide in the first groove 211, so that the first end 531 abuts against the support bearing 141. Clearly, before the first end 531 abuts against the support bearing 141, the rotating shaft 121 will be inserted into the clearance hole 533, and the pusher 530 will be unable to apply thrust to the rotating shaft 121 during sliding. The pusher 530 pushes the support bearing 141 until it comes into contact with the second rotor 1222, causing the pusher 530 to push the support bearing 141 and the second rotor 1222 to move synchronously toward the second stator 1122. This, in turn, causes the first rotor 1221 to move away from the first stator 1121 from its contact position. In short, the first rotor 1221 moves away from the first stator 1121 from its contact position. During the synchronous movement of the support bearing 141 and the second rotor 1222, since the pusher 530 cannot apply a thrust to the shaft 121, the support bearing 141, the second rotor 1222, and the shaft 121 all move synchronously.

[0075] When the pusher 530 drives the support bearing 141 to just make contact with the second rotor 1222, the drive adapter 520 stops driving the pusher 530 to continue sliding, and the adjustment assembly 510 is calibrated and zeroed. After calibration and zeroing, the drive adapter 520 drives the pusher 530 to slide, causing the support bearing 141 and the second rotor 1222 to move closer to the second stator 1122 by a first distance, which in turn causes the first rotor 1221 to move away from the contact position from the first stator 1121 by a first distance. The distance between the first stator 1121 and the first rotor 1221 is the first distance. The first distance is less than the basic distance, so there is still a gap between the second rotor 1222 and the second stator 1122. The value of the first distance is in the range of 0.25-0.35mm, and the specific value of the first distance can be 0.25mm, 0.3mm, or 0.35mm, etc. For example, when the base spacing is 0.4mm and the first distance is 0.3mm, the spacing between the first stator 1121 and the first rotor 1221 is 0.3mm, and the spacing between the second rotor 1222 and the second stator 1122 is 0.1mm. Of course, at the instant the first rotor 1221 moves away from the contact position away from the first stator 1121 to the first distance, it is necessary to stop driving the adapter 520 to continue sliding the pusher 530. In fact, when the scale and electronic number on the adjusting component 510 are the value of the first distance, the operation of the adjusting component 510 to continue sliding the adapter 520 is stopped. For example, when the first distance is 0.3mm, when the scale and electronic number on the adjusting component 510 are 0.3mm, the driving of the adapter 520 to continue sliding is stopped.

[0076] To determine whether the support bearing 141 is just in contact with the second rotor 1222, the following method can be used: For example, the pusher 530 can be used to push the support bearing 141 and the second rotor 1222 to slide, thereby causing the first rotor 12211 to move a set distance away from the contact position from the first stator 1121. During the movement of the first rotor 1221 away from the contact position from the first stator 1121, the shaft 121 will also push the sleeve 322 to move through the fixing assembly 130. The sleeve 322 will also move the aforementioned set distance. Then, the value of the set distance is measured, and the adjusting assembly 510 is calibrated and zeroed. Next, the adjusting assembly 510 is operated so that the adapter 520 slides in the opposite direction. By observing the scale or electronic number on the adjusting assembly 510, when the value of the scale or electronic number is equal to the value of the set distance, the adapter 520 is stopped from continuing to slide in the opposite direction. At this time, it can be determined that the pusher 530 has pushed the support bearing 141 to just contact the second rotor 1222. For example, a distance sensor can be installed on the support bearing 141. When the distance sensor detects that the distance between the second rotor 1222 and the support bearing 141 is zero, it can be determined that the pusher 530 pushes the support bearing 141 to just contact the second rotor 1222.

[0077] S630, fixed end cap assembly 140 to stator assembly 110.

[0078] Specifically, after the first rotor 1221 moves a first distance away from the contact position away from the first stator 1121, the drive adapter 520 stops, causing the pusher 530 to continue sliding, and then the end cap 142 is fixed to the housing 111. For example, the end cap 142 can be fixed to the housing 111 by welding. Alternatively, adhesive can be injected between the end cap 142 and the housing 111 by dispensing, and then the adhesive is baked for 60 to 80 minutes at a temperature of 65°C to 75°C. After baking, the adhesive will solidify to form an adhesive layer, thereby fixing the end cap 142 to the housing 111. After the end cap 142 is fixed, under the action of the elastic member 330, the second rotor 1222 will still abut against the support bearing 141, thus maintaining zero clearance between the second rotor 1222 and the support bearing 141.

[0079] S640, rotate the pusher 530 so that the pusher 530 presses against the rotating shaft 121 of the blood pump.

[0080] Specifically, the limiting plate 280 is disassembled, the pusher 530 is changed from the first state to the second state, and the pusher 530 in the second state is engaged with the second groove 221, and then the limiting plate 280 is installed. The adapter 520 is driven by the adjusting component 510 so that the adapter 520 contacts the first end 531 of the pusher 530, and then the second end 532 of the pusher 530 contacts the rotating shaft 121.

[0081] S650, the adjusting component 510 drives the pusher 530 to move so that the second rotor 1222 moves a second distance from the position in contact with the end cover assembly 140, the sum of the first distance and the second distance is less than the base spacing.

[0082] Specifically, the adjusting component 510 drives the pushing component 530 to push the rotating shaft 121 to continue sliding. Since the end cover 142 is fixed, the support bearing 141 is also fixed. Therefore, the rotating shaft 121 will slide relative to the support bearing 141, thereby driving the second rotor 1222 to move away from the position in contact with the support bearing 141 by a second distance. That is, the second rotor 1222 moves away from the contact position from the support bearing 141 by a second distance. The value of the second distance can be in the range of 0.015-0.025mm; the specific value of the second distance can be 0.015mm, 0.02mm, or 0.025mm, etc. The value of the second distance is the value of the clearance H between the second rotor 1222 and the support bearing 141. The sum of the second distance and the first distance is less than the basic distance, which can effectively prevent the second stator 1122 and the second rotor 1222 from contacting each other, ensuring that there is a second air gap F between the second stator 1122 and the second rotor 1222. As the second rotor 1222 moves a second distance away from the contact position away from the support bearing 141, the first rotor 1221 and the fixing assembly 130 will also move a second distance away from the first stator 1121. For example, based on the above-mentioned basic spacing of 0.4mm and the first distance of 0.3mm, when the second distance is 0.02mm, the value of the first air gap E between the first stator 1121 and the first rotor 1221 is the sum of the first distance and the second distance, that is, the value of the first air gap E is 0.32mm.

[0083] When the second end 532 of the pusher 530 just contacts the rotating shaft 121, the sliding of the pusher 530 is stopped, and the adjusting component 510 is calibrated and zeroed. After calibration and zeroing, the adjusting component 510 drives the adapter 520 to slide the pusher 530. When the value of the scale or electronic number on the adjusting component 510 is the value of the second distance, the driving of the adapter 520 is stopped. At this time, the clearance H between the second rotor 1222 and the support bearing 141 is exactly equal to the value of the second distance. For example, when the second distance is 0.02mm, when the scale and electronic number on the adjusting component 510 are 0.02mm, the driving of the adapter 520 to continue sliding is stopped.

[0084] To determine how to determine if the second end 532 of the pusher 530 is just in contact with the rotating shaft 121, you can refer to the method described above for determining if the support bearing 141 is just in contact with the second rotor 1222.

[0085] After the adjusting component 510 moves the pusher 530, the blood pump assembly method also includes fixing the fixing component 130 and the stator component 110.

[0086] Specifically, after the second rotor 1222 moves a second distance away from the contact position away from the support bearing 141, the drive adapter 520 stops, causing the pusher 530 to continue sliding, and then the fixing seat 132 is fixed to the housing 111. For example, adhesive can be injected between the fixing seat 132 and the housing 111 by dispensing, and then the adhesive is baked for 60 to 80 minutes at a temperature of 65°C to 75°C. After baking, the adhesive will solidify to form an adhesive layer, thereby fixing the fixing seat 132 to the housing 111.

[0087] Once the mounting bracket 132 is fixed, the blood pump 11 is assembled. At this point, the value of the first air gap E between the first rotor 1221 and the first stator 1121 is the sum of the first distance and the second distance, and the value of the clearance H between the second rotor 1222 and the support bearing 141 is the value of the second distance. Of course, the value of the second air gap F between the second rotor 1222 and the second stator 1122 is the value obtained by subtracting the first distance and the second distance from the base distance.

[0088] By assembling the blood pump 11 using the aforementioned blood pump assembly fixture 12, the end cap 142 can be repeatedly disassembled, allowing for quick and precise adjustment of the air gap and clearance H values. This improves the assembly efficiency and accuracy of the blood pump 11. Simultaneously, the first groove 211, the second groove 221, and the third groove 231 are spaced apart and aligned along the same straight line extending axially along the blood pump 11. This ensures that the forces exerted on the blood pump 11 by the elastic pressing mechanism 300 and the adjusting mechanism 500 are on the same straight line, thereby improving the adjustment accuracy of the air gap and clearance H, and consequently enhancing the assembly accuracy of the blood pump 11.

[0089] 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.

[0090] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A blood pump assembly fixture, characterized in that, The blood pump includes a stator assembly, a rotor assembly, and an end cap assembly. The end cap assembly is disposed at one end of the stator assembly. The rotor assembly includes a connected rotor and a rotating shaft. The rotating shaft passes through the stator assembly and the end cap assembly. The rotor is disposed at one end of the stator assembly. The first stator of the blood pump is in contact with the first rotor of the blood pump, and the second stator of the blood pump has a basic distance from the second rotor of the blood pump. The blood pump assembly fixture includes: The base is provided with a blood pump mounting part, which has a mounting port for the blood pump shaft and the end cap assembly to extend out. A fixing mechanism, wherein the fixing mechanism is disposed on the base and is capable of pressing the blood pump against the blood pump mounting part; and An adjustment mechanism is provided, comprising an adjustment component and a pusher, both disposed on the base, with the pusher located between the blood pump mounting portion and the adjustment component. The pusher has a first end capable of abutting against the end cap assembly and a second end capable of abutting against the rotating shaft. The adjustment component can drive the pusher to move toward the mounting port, so that the first end abuts against the end cap assembly and the second end abuts against the rotating shaft. The pusher is detachably mounted on the base and can move relative to the base toward the mounting port. The direction of movement of the pusher is the same as the length direction of the blood pump. The first end and the second end are located at opposite ends of the pusher. The adjustment component can selectively abut against the first end or the second end.

2. The blood pump assembly fixture according to claim 1, characterized in that, The adjustment mechanism is a micrometer.

3. The blood pump assembly fixture according to claim 1, characterized in that, The first end has a clearance hole extending along the moving direction of the pusher, and the clearance hole can accommodate the rotating shaft.

4. The blood pump assembly fixture according to claim 1, characterized in that, The base is provided with a first groove, the bottom surface of the first groove being adapted to contact the push member. The blood pump mounting part is also provided with a second groove, the second groove penetrating the end of the base toward the adjustment mechanism to form the mounting opening. The bottom surface of the second groove is adapted to contact the outer peripheral surface of the blood pump. The first groove and the second groove are arranged along the moving direction of the push member, and along the moving direction of the push member, the bottom surfaces of the first groove and the second groove are coplanar.

5. The blood pump assembly fixture according to claim 1, characterized in that, The blood pump assembly fixture also includes an elastic pressing mechanism, which is disposed on the base and adapted to elastically abut against the fixing components of the blood pump.

6. The blood pump assembly fixture according to claim 5, characterized in that, The elastic pressing mechanism includes a sleeve component, a pressing component, and an elastic element. The sleeve component is fixed on the base. The pressing component is slidably inserted through the sleeve component and presses against the fixed component. The elastic element abuts between the sleeve component and the pressing component.

7. The blood pump assembly fixture according to claim 6, characterized in that, The sleeve assembly includes an outer sleeve and an inner sleeve. The outer sleeve has a first through hole, and the inner sleeve is received in the first through hole and threadedly connected to the outer sleeve. The inner sleeve has a second through hole coaxially arranged with the first through hole, and the pressing assembly can slide through the first through hole and the second through hole.

8. A method for assembling a blood pump, characterized in that, The blood pump is assembled using the blood pump assembly fixture as described in any one of claims 1 to 7, the blood pump assembly method comprising: Secure the stator assembly to the base; Adjusting the adjustment component causes the pusher to press against the end cover assembly. When the end cover assembly presses against the second rotor, continue adjusting the adjustment component so that the first rotor moves away from the contact position from the first stator by a first distance. Secure the end cap assembly to the stator assembly; Rotate the pusher so that it presses against the shaft of the blood pump; Adjusting the adjusting component drives the pushing member to move, so that the second rotor moves a second distance from the position in contact with the end cap assembly, the sum of the first distance and the second distance being less than the base spacing.

9. The blood pump assembly method according to claim 8, characterized in that, The blood pump also includes a fixing component, which is disposed at the other end of the stator assembly. The blood pump assembly fixture also includes an elastic pressing mechanism. After fixing the stator assembly to the base, the method further includes pressing the elastic pressing mechanism against the fixing component axially.

10. The blood pump assembly method according to claim 9, characterized in that, After the adjusting component moves the pusher, the blood pump assembly method further includes fixing the fixing component and the stator component.

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