Blood pump assembly device and blood pump manufacturing method

Abstract

This application relates to an assembly device for a blood pump and a method for manufacturing a blood pump. The blood pump includes a motor and an outlet window. An impeller is provided at one end of the motor, and the outlet window is assembled at one end of the motor and surrounds the impeller. The assembly device for the blood pump includes a first positioning member, a second positioning member, and an adjusting member. The first positioning member has a first limiting hole that can limit the motor, and the wall of the first limiting hole can abut against the motor. The second positioning member has a second limiting hole that can limit the outlet window, and the wall of the second limiting hole can abut against the outlet window to press the outlet window against the motor along the axial direction of the second positioning member. The second positioning member has an opening communicating with the first limiting hole to expose the connection between the motor and the outlet window. The adjusting member passes through one of the first and second positioning members and abuts against the other. The adjusting member can adjust the position of the first positioning member relative to the second positioning member so that the outlet window can be coaxial with the impeller to ensure the stability of the impeller operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of assembly tooling, in particular to an assembly device of a blood pump and a manufacturing method of the blood pump. BACKGROUND

[0002] When the blood pump is working, the blood pump crosses the aortic valve, so that the inlet window is placed in the left ventricle and the outlet window is placed in the aorta. The blood in the left ventricle is pumped to the aorta by rotating the impeller driven by the motor, thereby reducing the workload of the heart and maintaining blood circulation.

[0003] In order to ensure the stability of the impeller, it is usually necessary to ensure the accurate relative position between the outlet window and the impeller. The current method for adjusting the relative position between the outlet window and the impeller has a large error, which cannot ensure the accurate relative position between the outlet window and the impeller, thereby affecting the stability of the impeller. SUMMARY

[0004] Therefore, it is necessary to provide an assembly device of a blood pump and a manufacturing method of the blood pump, which has a simple structure and can ensure the accurate relative position between the outlet window and the impeller.

[0005] In a first aspect, the present application provides an assembly device of a blood pump, the blood pump comprising a motor and an outlet window, one end of the motor being provided with an impeller, the outlet window being assembled at one end of the motor and surrounding the impeller, the assembly device of the blood pump comprising:

[0006] a first positioning member having a first limiting hole capable of limiting the motor, a hole wall of the first limiting hole being capable of abutting against the motor;

[0007] a second positioning member having a second limiting hole capable of limiting the outlet window, a hole wall of the second limiting hole being capable of abutting against the outlet window to press the outlet window against the motor along an axial direction of the second positioning member, the second positioning member being provided with an opening in communication with the first limiting hole to expose a connection portion of the motor and the outlet window; and

[0008] an adjusting member, the adjusting member being arranged in one of the first positioning member and the second positioning member and abutting against the other one, the adjusting member being capable of adjusting the position of the first positioning member relative to the second positioning member, so that the outlet window is coaxial with the impeller.

[0009] In an embodiment of the present application, the second positioning member comprises a first positioning segment and a second positioning segment connected with each other, the first positioning segment having the second limiting hole, and the second positioning segment being sleeved on the first positioning member to limit the first positioning member.

[0010] In an embodiment of the present application, the second limiting hole has a coaxially arranged first inner diameter section and a second inner diameter section, the inner diameter of the first inner diameter section is matched with the outer diameter of the outlet window, and the inner diameter of the second inner diameter section is greater than the inner diameter of the first inner diameter section, so that part of the motor can extend into the second inner diameter section.

[0011] And / or, the inner diameter of the second positioning section is greater than the inner diameter of the first positioning section.

[0012] And / or, the outer diameter of the second positioning section is greater than the outer diameter of the first positioning section.

[0013] In an embodiment of the present application, the first positioning section includes a first inner circumferential surface, the second positioning section includes a second inner circumferential surface, the inner diameter of the second inner circumferential surface is greater than the inner diameter of the first inner circumferential surface, the second positioning member further includes a limiting surface connected between the first inner circumferential surface and the second inner circumferential surface, and the first positioning member and the limiting surface have a gap therebetween.

[0014] In an embodiment of the present application, the first positioning member includes an end surface, the gap between the end surface and the limiting surface is g, the adjusting member is arranged along the radial direction of the second positioning member and penetrates the second positioning member, and the distance from the axis of the adjusting member to the limiting surface is L, wherein: g is greater than or equal to 0.25 mm, and g is less than or equal to L.

[0015] In an embodiment of the present application, the second positioning member includes a first positioning section and a second positioning section connected together, the second positioning section is sleeved on the first positioning member, the second positioning section has a threaded hole, the threaded hole penetrates the inner cavity of the second positioning section along the radial direction of the second positioning member, the adjusting member cooperates with the threaded hole and abuts against the outer wall of the first positioning member.

[0016] In an embodiment of the present application, the number of threaded holes is a plurality, the plurality of threaded holes are arranged at intervals along the circumferential direction of the second positioning member, and the number of adjusting members is a plurality, each adjusting member is installed in a threaded hole to adjust the gap between the first positioning member and the second positioning member at the corresponding position.

[0017] In an embodiment of the present application, the plurality of threaded holes are uniformly distributed along the circumferential direction of the second positioning member.

[0018] And / or, the number of threaded holes is an even number, and the axes of every two threaded holes of the plurality of threaded holes are coaxial.

[0019] And / or, a plurality of the adjusting members arranged along the circumference of the second positioning member form an adjusting assembly, the number of the adjusting assemblies is multiple groups, and the multiple groups of the adjusting assemblies are arranged along the axis of the second positioning member.

[0020] In an embodiment of the present application, the first positioning member can be fixed to a welding machine, the adjusting member is threadedly connected with the first positioning member, and abuts against the outer wall of the second positioning member to adjust the rotation angle of the second positioning member relative to the first positioning member.

[0021] In a second aspect, the present application further provides a manufacturing method of a blood pump, which is applied to the assembling device of the blood pump as described in any of the technical features above, and the manufacturing method of the blood pump comprises the following steps:

[0022] Placing a motor in the first limiting hole of the first positioning member, one end of the motor being provided with an impeller;

[0023] Placing an outlet window in the second limiting hole of the second positioning member, and sleeving the outlet window on the impeller;

[0024] Sleeving and abutting one end of the second positioning member on the first positioning member to axially position the motor and the outlet window;

[0025] Driving the adjusting member to make the outlet window coaxial with the impeller;

[0026] Connecting the connection between the motor and the outlet window through the opening.

[0027] In an embodiment of the present application, the driving of the adjusting member to make the outlet window coaxial with the impeller comprises the following steps:

[0028] Driving the adjusting member to adjust the angle of the axis of the first limiting hole relative to the axis of the second limiting hole;

[0029] Extending a rod-shaped measuring tool into the gap between the impeller and the inner wall of the outlet window, and rotating the measuring tool around the axis of the impeller for one revolution;

[0030] When the measuring tool does not contact the impeller, the outlet window is coaxial with the impeller;

[0031] When the measuring tool contacts the impeller, continue to drive the adjusting member and rotate the measuring tool until the measuring tool does not contact the impeller.

[0032] In an embodiment of the present application, the driving of the adjusting member to adjust the angle of the axis of the first limiting hole relative to the axis of the second limiting hole comprises at least the following steps:

[0033] If the gap between the impeller and the outlet window is the smallest, tighten the adjusting component corresponding to the smallest gap, and at the same time loosen the adjusting component that is 180° away from the adjusting component.

[0034] If the gap between the impeller and the outlet window is at its maximum, then loosen the adjusting member corresponding to the smallest gap, and simultaneously tighten the adjusting member that is 180° away from the adjusting member.

[0035] By adopting the above technical solution, this application has at least the following technical effects:

[0036] The present application discloses a blood pump assembly device and a blood pump manufacturing method. In the assembly device, a first positioning member has a first limiting hole for limiting the motor, and a second positioning member has a second limiting hole for limiting the outlet window. The wall of the first limiting hole abuts against the motor, and the wall of the second limiting hole abuts against the outlet window, thereby achieving axial abutment between the motor and the outlet window. Furthermore, the position of the first limiting member relative to the second limiting member is adjusted by an adjusting member, so that the impeller located at the end of the motor can be coaxial with the outlet window. Thus, the connection between the motor and the outlet window can be made through the opening in the second positioning member, thereby ensuring accurate relative positioning between the impeller and the outlet window and guaranteeing the stability of the impeller's operation. The manufacturing method of this blood pump simplifies the assembly steps of the motor and the outlet window by limiting the motor with the first positioning member, limiting the outlet window with the second positioning member, and adjusting the coaxiality between the outlet window and the impeller with the adjusting member. It is simple to operate, reduces assembly errors between the motor and the outlet window, and facilitates the assembly of the outlet window onto the motor. Attached Figure Description

[0037] Figure 1 A schematic diagram of the assembly device (motor and outlet window) for the blood pump provided in this application from one perspective.

[0038] Figure 2 for Figure 1 The diagram shows the assembly of the blood pump from another perspective.

[0039] Figure 3 for Figure 2 A sectional view along the XX direction.

[0040] Figure 4 This is a schematic diagram of the assembly device for the blood pump provided in this application.

[0041] Figure 5 for Figure 1 An exploded view of the blood pump assembly shown.

[0042] Figure 6 for Figure 4 A schematic diagram of the second positioning component of the blood pump assembly device from one perspective.

[0043] Figure 7 Fig. 2 is a schematic view of the second positioning member of the assembling device of the blood pump shown in Fig. 1. Figure 4

[0044] Figure 8 Fig. 3 is a longitudinal sectional view of the second positioning member of the assembling device of the blood pump shown in Fig. 1. Figure 4

[0045] Figure 9 Fig. 4 is a partial enlarged view of the assembling device of the blood pump shown in Fig. 1 at A. Figure 3

[0046] Figure 10 Fig. 5 is a partial enlarged view of the assembling device of the blood pump shown in Fig. 1 at B. Figure 3

[0047] Figure 11 Fig. 6 is a partial enlarged view of the assembling device of the blood pump shown in Fig. 1 at C. Figure 3

[0048] Figure 12 Fig. 7 is a flow chart of the manufacturing method of the blood pump according to the present application.

[0049] 10, assembling device of the blood pump; 100, first positioning member; 110, first stepped surface; 120, positioning portion; 121, third aperture; 122, fourth aperture; 123, first wire outlet hole; 130, limiting portion; 140, clamping portion; 150, first limiting hole; 160, end surface; 200, second positioning member; 210, second stepped surface; 220, first positioning segment; 220a, first inner circumferential surface; 221, first inner diameter segment; 2211, first hole segment; 2212, second hole segment; 222, second inner diameter segment; 223, opening; 230, second positioning segment; 230a, second inner circumferential surface; 231, threaded hole; 240, second limiting hole; 250, limiting surface; 300, adjusting member; 40, motor; 410, first stepped surface; 50, outlet window; 510, second stepped surface; 60, impeller. DETAILED DESCRIPTION

[0050] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without using these specific details. In other instances, well-known methods have not been described in detail in order to avoid unnecessarily obscuring the present application. Therefore, the specific embodiments described herein are not intended to limit the present application, but rather, the intent is to cover all modifications and alternatives falling within the scope of the present application.

[0051] ​​​​​In addition, if there are these terms "first", "second", these terms are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0052] In the present application, unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] The inventors of the present application found that in the conventional way, the relative position between the outlet window and the impeller is adjusted by first fixing the motor, then adjusting the position of the outlet window relative to the motor, and after adjustment, the outlet window and the impeller are preliminarily positioned to ensure the relative position relationship between them. The error of the above adjustment method is large, which cannot guarantee the accuracy of the relative position between the outlet window and the impeller, and further affects the stability of the impeller work.

[0054] In order to improve at least part of the above problems, the present application provides an assembly device of a blood pump and a manufacturing method of a blood pump, which can realize the assembly between the outlet window 50 and the motor 40, so that the outlet window 50 and the impeller 60 are coaxially arranged to ensure the stability of the impeller 60 work. The manufacturing method of the blood pump simplifies the assembly steps of the outlet window 50 and the motor 40, is simple to operate, can reduce the assembly error between the motor 40 and the outlet window 50, and is convenient for assembly and use.

[0055] Referring to Figures 1 to 3 , the present application provides an assembly device 10 of a blood pump, which is used for the outlet window 50 of the blood pump to be mounted on the motor 40, wherein the blood pump comprises a motor 40, an impeller 60 and an outlet window 50, and one end of the motor 40 is provided with the impeller 60. Specifically, the impeller 60 and the outlet window 50 are both assembled on one end of the motor 40, and the outlet window 50 surrounds the impeller 60.

[0056] The axial direction refers to the same direction as the extension direction of the central axis of the blood pump, and the axial direction is also the axial direction of the second positioning member 200 and the first positioning member 100. The radial direction is perpendicular to the axial direction, which is the direction perpendicular to the central axis of the motor 40. The circumferential direction refers to the circumferential direction around the axis of the blood pump, and the circumferential direction is also the circumferential direction of the second positioning member 200 and the first positioning member 100. The specific directions of the axial direction, the radial direction, and the circumferential direction will not be described again hereinafter.

[0057] The assembling device 10 of the blood pump of the present application can adjust the position of the first positioning member 100 relative to the second positioning member 200, so that the outlet window 50 can be coaxially arranged with the impeller 60 to ensure the stability of the operation of the impeller 60. Moreover, the assembling device 10 of the blood pump simplifies the assembling steps of the outlet window 50 and the motor 40, is easy to operate, can reduce the assembling error between the motor 40 and the outlet window 50, and facilitates the assembling of the outlet window 50 to the motor 40. The specific structure of the assembling device 10 of the blood pump of an embodiment will be introduced below.

[0058] Referring to Figures 1 to 5 In an embodiment, the assembling device 10 of the blood pump comprises a first positioning member 100, a second positioning member 200, and an adjusting member 300. The first positioning member 100 is used for positioning the motor 40, and the second positioning member 200 is used for positioning the outlet window 50. The first positioning member 100 has a first limiting hole 150 capable of limiting the motor 40. The hole wall of the first limiting hole 150 has a first stepped surface 110 capable of abutting against the motor 40. The second positioning member 200 has a second limiting hole 240 capable of limiting the outlet window 50. The hole wall of the second limiting hole 240 has a second stepped surface 210 capable of abutting against the outlet window 50. The second positioning member 200 is sleeved on one end of the first positioning member 100, so that the motor 40 and the outlet window 50 abut along the axial direction of the blood pump. The first stepped surface 110 can cooperate with the second stepped surface 210 to press the outlet window 50 against the motor 40 along the axial direction of the second positioning member 200. The adjusting member 300 is arranged in one of the first positioning member 100 and the second positioning member 200 and abuts against the other one. The adjusting member 300 can adjust the position of the first limiting member 100 relative to the second limiting member 200, so that the impeller 60 arranged at the end of the motor 40 can be coaxial with the outlet window 50. The second positioning member 200 is provided with an opening 223 communicating with the first limiting hole 150 to expose the connection position of the motor 40 and the outlet window 50. The motor 40 and the outlet window 50 can be connected through the opening 223. In this way, the motor 40 and the outlet window 50 can be connected at the connection position through the opening 223 on the basis of the coaxial arrangement of the impeller 60 and the outlet window 50, so as to realize the assembling of the outlet window 50 to the motor 40.

[0059] The first positioning member 100 is installed in the first limiting hole 150 of the second positioning member 200, and the first positioning member 100 abuts against the second positioning member 200, so that the motor 40 abuts against the outlet window 50 in the axial direction. At this time, the outlet window 50 is arranged around the impeller 60. The first positioning member 100 and the second positioning member 200 are both hollow cylindrical structures. The outlet window 50 is installed in the second limiting hole 240 of the second positioning member 200, and the outlet window 50 is axially positioned by the second positioning member 200, so that the position of the outlet window 50 in the second positioning member 200 is accurate. The motor 40 is installed in the first positioning member 100, and the motor 40 is axially positioned by the first positioning member 100, so that the position of the motor 40 in the first positioning member 100 is accurate.

[0060] Specifically, the hole wall of the first limiting hole 150 of the first positioning member 100 has a first step surface 110. The first limiting hole 150 has two hole diameters along the axial direction. The hole diameter of the side of the first limiting hole 150 for installing the motor 40 is larger than the hole diameter of the other side, so that the first step surface 110 is formed in a step shape. After the motor 40 is installed in the first positioning member 100, the outer wall of the motor 40 abuts against the first step surface 110, and the motor 40 is axially positioned by the first step surface 110. Specifically, the outer wall of the motor 40 has a first step surface 410 in a step shape. After the motor 40 is installed in the first positioning member 100, the first step surface 410 of the outer wall of the motor 40 abuts against the first step surface 110, so that the motor 40 is axially positioned in the first positioning member 100, and the position of the motor 40 in the first positioning member 100 is accurate.

[0061] The hole wall of the second limiting hole 240 of the second positioning member 200 has a second step surface 210. The second limiting hole 240 has two hole diameters along the axial direction. The hole diameter of the end of the second limiting hole 240 close to the motor 40 is larger than the hole diameter of the other end, so that the second step surface 210 is formed in a step shape. After the outlet window 50 is installed in the second positioning member 200, the outer wall of the outlet window 50 abuts against the second step surface 210, and the outlet window 50 is axially positioned by the second step surface 210. Specifically, the outer wall of the outlet window 50 has a second step surface 510 in a step shape. After the outlet window 50 is installed in the second positioning member 200, the second step surface 510 of the outer wall of the outlet window 50 abuts against the second step surface 210, so that the outlet window 50 is axially positioned in the second positioning member 200, and the position of the outlet window 50 in the second positioning member 200 is accurate.

[0062] The impeller 60 is installed at the rear of the motor 40, and the impeller 60 is located in the outlet window 50. When the motor 40 drives the impeller 60 to rotate, the impeller 60 can rotate in the outlet window 50. If the axis of the impeller 60 does not coincide with the axis of the outlet window 50 when the impeller 60 is installed, the axis of the impeller 60 will deviate from the axis of the outlet window 20, and the impeller 60 will contact the outlet window 50 when rotating, affecting the stability of the blood pump and the service life of the impeller 60.

[0063] In the embodiment, the adjusting member 300 is arranged along the radial direction of the second positioning member 200. When it is necessary to adjust the position of the outlet window 50, the second positioning member 200 can be moved relative to the first positioning member 100 by the adjusting member 300. Specifically, the second positioning member 200 can drive the outlet window 50 to move, so as to adjust the position of the outlet window 50, so that the axis of the impeller 60 coincides with the axis of the outlet window 50, avoiding the impeller 60 from contacting the outlet window 50 when rotating, and ensuring the stability of the rotation of the impeller 60.

[0064] When the assembling device 10 of the blood pump is assembled, the motor 40 is placed in the first positioning member 100, and the outlet window 50 is placed in the second positioning member 200. Then, the first positioning member 100 is sleeved on the end of the second positioning member 200, so that the outlet window 50 is arranged at one end of the motor 40. By abutting the motor 40 against the first stepped surface 110 and abutting the outlet window 50 against the second stepped surface 210, the outlet window 50 and the motor 40 can be positioned in abutment along the axial direction of the blood pump. Then, the position of the first positioning member 100 relative to the second positioning member 200 is adjusted by the adjusting member 300, so that the impeller 60 arranged at the end of the motor 40 can be coaxial with the outlet window 50, and the connection between the motor 40 and the outlet window 50 can be connected through the opening 223.

[0065] The assembling device 10 of the blood pump in the above embodiment is characterized in that one end of the first positioning member 100 is installed in the second positioning member 200, and the motor 40 is in abutment with the first stepped surface 110 and the outlet window 50 is in abutment with the second stepped surface 210, so as to position the motor 40 and the outlet window 50 in abutment along the axial direction of the blood pump. The position of the second positioning member 200 relative to the first positioning member 100 is adjusted by the adjusting member 300, so that the relative position between the motor 40 and the outlet window 50 is accurate, and the stability of the operation of the impeller 60 is ensured. Moreover, the assembling device 10 of the blood pump simplifies the assembly steps of the motor 40 and the outlet window 50, is easy to operate, can reduce the error between the motor 40 and the outlet window 50, and is beneficial to assembling the outlet window 50 to the motor 40.

[0066] In the embodiment, the outlet window 50 is connected to the motor 40 by welding or bonding. In this way, the outlet window 50 can be reliably fixed to the motor 40. In other embodiments, the outlet window 50 can be connected to the motor 40 by bonding or clamping or other connection methods. For ease of description, the outlet window 50 is connected to the motor 40 by welding in the present application. The first positioning member 100 is clamped and positioned to a welding machine, i.e., the first positioning member 100 is fixedly arranged, so that the position of the motor 40 in the first positioning member 100 is fixed. In this way, when the position of the second positioning member 200 relative to the first positioning member 100 is adjusted, the angle of the axis of the outlet window 50 relative to the axis of the impeller 60 can be adjusted, so that the relative position of the outlet window 50 and the impeller 60 is accurate, i.e., the axis of the outlet window 50 is coaxial with the axis of the impeller 60.

[0067] Referring to Figure 3 、 Figure 6 and Figure 7 In an embodiment, the second positioning member 200 includes a first positioning segment 220 and a second positioning segment 230 connected together. The first positioning segment 220 has a second limiting hole 240 for limiting the outlet window 50, and the second positioning segment 230 is sleeved on the first positioning member 100. The inner wall of the second limiting hole 240 has a second stepped surface 210. The first positioning segment 220 is used for limiting the outlet window 50, and the second positioning segment 230 is used for limiting one end of the first positioning member 100.

[0068] The first positioning segment 220 and the second positioning segment 230 are both hollow cylindrical structures, and the first positioning segment 220 and the second positioning segment 230 are coaxially arranged. The second positioning segment 230 is sleeved on the end of the first positioning member 100 to limit the first positioning member 100, so that the first positioning member 100 and the second positioning member 200 are not separated during adjustment, and the continuity of the adjustment of the blood pump assembly 10 is ensured. Moreover, the second stepped surface 210 is arranged on the inner wall of the second limiting hole 240, and the outer wall of the outlet window 50 abuts against the first stepped surface 110 after the outlet window 50 is installed on the first positioning segment 220.

[0069] Optionally, the inner diameter of the second positioning section 230 is greater than the inner diameter of the first positioning section 220, wherein the first positioning section 220 comprises a first inner circumferential surface 220a, and the second positioning section 230 comprises a second inner circumferential surface 230a, and the inner diameter of the second inner circumferential surface 230a is greater than the inner diameter of the first inner circumferential surface 220a. The second positioning member 200 further comprises a limiting surface 250 connected between the first inner circumferential surface 220a and the second inner circumferential surface 230a, and the first positioning member 100 has a gap with the limiting surface 250, so as to avoid the first positioning member 100 being blocked from rotating relative to the second positioning member 200 due to abutting against the limiting surface 250, that is, the gap between the first positioning member 100 and the limiting surface 250 can reduce the resistance of the relative rotation between the first positioning member 100 and the second positioning member 200, thereby reducing the operation difficulty of the adjusting member 300 and facilitating the adjustment of the impeller 60 coaxial with the outlet window 50. Since the motor 40 abuts against the first step surface 110 and the outlet window 50 abuts against the second step surface 210, the outlet window 50 and the motor 40 can be positioned in abutment along the axial direction of the blood pump. If the first positioning member 100 abuts against the limiting surface 250, over-positioning will occur, which will cause the outlet window 50 and the motor 40 to be separated, and this is not conducive to the assembly of the outlet window 50 and the motor 40. Therefore, the gap between the first positioning member 100 and the limiting surface 250 also avoids over-positioning and facilitates the assembly of the outlet window 50 and the motor 40.

[0070] For reference Figure 11 In the embodiment, the first positioning member 100 comprises an end surface 160, the gap between the end surface 160 and the limiting surface 250 is g, the adjusting member 300 is arranged in the second positioning member 200 along the radial direction of the second positioning member 200, and the distance from the axis of the adjusting member 300 to the limiting surface 250 is L, wherein g is greater than or equal to 0.25 mm, and g is less than or equal to L. In this way, the adjusting function of the adjusting member 300 can be ensured on the basis of the smooth rotation of the second positioning member 200 relative to the first positioning member 100. Specifically, when g is less than 0.25 mm, the space for the rotation of the second positioning member 200 relative to the first positioning member 100 is small, which limits the rotation of the second positioning member 200. When g is greater than L, most of the adjusting member 300 is opposite to the gap between the end surface 160 and the limiting surface 250, which causes the adjusting member 300 to be deviated during the adjustment, and thus the rotation of the adjusting member 300 cannot drive the second positioning member 200 to rotate relative to the first positioning member 100, and the adjusting function of the adjusting member 300 is limited.

[0071] Optionally, the outer diameter of the second positioning section 230 is greater than the outer diameter of the first positioning section 220, that is, the diameter of the outer wall of the second positioning section 230 is greater than the diameter of the first positioning section 220. In this way, the second positioning section 230 can have a certain thickness, thereby ensuring the structural strength of the second positioning section 230. Optionally, the wall thickness of the first positioning section 220 is the same as the wall thickness of the second positioning section 230, so that the overall structural strength of the second positioning member 200 is basically consistent.

[0072] Optionally, the first positioning section 220 and the second positioning section 230 are integrally formed, so that the structural strength of the connection between the first positioning section 220 and the second positioning section 230 can be ensured, and the connection can be prevented from being broken. Optionally, the outer contour of the first positioning section 220 and the second positioning section 230 is in a cylindrical shape, so that the second positioning member 200 is conveniently formed. Of course, in other embodiments of the present application, the cross-sectional shape of the first positioning section 220 and the second positioning section 230 can also be polygonal or other shapes.

[0073] Referring to Figure 3 In an embodiment, the second limiting hole 240 has a coaxially arranged first inner diameter section 221 and a second inner diameter section 222. The inner diameter of the first inner diameter section 221 is adapted to the outer diameter of the outlet window 50, so as to install the outlet window 50. The second inner diameter section 222 is for the motor 40 to extend into. The first inner diameter section 221 and the second inner diameter section 222 are connected to form the inner wall of the second limiting hole 240. The inner diameter of the second inner diameter section 222 is greater than the inner diameter of the first inner diameter section 221, so that part of the motor 40 can extend into the second inner diameter section 222. In this way, the outlet window 50 is axially positioned by the first inner diameter section 221, and after the motor 40 extends into the second inner diameter section 222, the outlet window 50 can be installed to one end of the motor 40, so as to facilitate the axial abutment of the motor 40 and the outlet window 50.

[0074] The second step surface 210 is located at the first inner diameter section 221, and the inner diameter of the first inner diameter section 221 is adapted to the outer diameter of the outlet window 50, so that the first inner diameter section 221 can axially position the outlet window 50. The inner diameter of the second inner diameter section 222 is greater than the inner diameter of the motor 40, so that the motor 40 can freely extend into the second inner diameter section 222, facilitating the connection of the motor 40 and the outlet window 50.

[0075] Referring to Figure 3 and Figure 9In an embodiment, the first inner diameter section 221 comprises a first hole section 2211 and a second hole section 2212 coaxially arranged, wherein the hole diameter of the first hole section 2211 is smaller than the hole diameter of the second hole section 2212 to form a stepped second step surface 210 at the joint of the first hole section 2211 and the second hole section 2212. After the outlet window 50 is mounted to the first inner diameter section 221, the second step surface 510 of the outer wall of the outlet window 50 abuts against the second step surface 210, thereby achieving axial positioning of the outlet window 50.

[0076] Referring to Figure 1 and Figure 7 In an embodiment, the first positioning section 220 has an opening 223 penetrating through the inner cavity of the first positioning section 220 in the radial direction to expose the joint position of the motor 40 and the outlet window 50. The opening 223 is arranged on the first positioning section 220 and penetrates through the inner cavity of the first positioning section 220 in the radial direction, i.e., the opening 223 is in communication with the inner cavity of the first positioning section 220. After the outlet window 50 axially abuts against the motor 40, the opening 223 can expose the joint of the outlet window 50 and the motor 40. Thus, after the relative position between the outlet window 50 and the impeller 60 is adjusted, the outlet window 50 and the motor 40 can be connected through the opening 223, so that the outlet window 50 is fixed to one end of the motor 40.

[0077] Optionally, the number of openings 223 is multiple, and the multiple openings 223 are arranged on the first positioning section 220 in the circumferential direction of the second positioning member 200. Thus, the outlet window 50 and the motor 40 can be connected at multiple positions through the multiple openings 223, to ensure that the outlet window 50 is reliably mounted to one end of the motor 40.

[0078] Referring to Figure 3 In an embodiment, there is a spacing between the outer wall of the first positioning member 100 and the inner wall of the second positioning section 230. That is, after the first positioning member 100 is sleeved on the second positioning section 230, there is a certain distance between the outer wall of the first positioning member 100 and the inner wall of the second positioning section 230. Adjusting the distance between the second positioning section 230 and the first positioning member 100 can adjust the position of the axis of the outlet window 50 relative to the axis of the motor 40, and further adjust the angle between the axis of the outlet window 50 and the axis of the impeller 60, so that the axis of the outlet window 50 is coaxial with the axis of the impeller 60, thereby ensuring the stability of the impeller 60 during rotation.

[0079] Referring to Figures 3 to 7 In an embodiment, the second positioning section 230 has a threaded hole 231 penetrating through the inner cavity of the second positioning section 230 in the radial direction of the second positioning member 200, and the adjusting member 300 is arranged in the threaded hole 231 and abuts against the outer wall of the first positioning member 100 to adjust the angle between the axis of the second positioning member 200 and the axis of the first positioning member 100.

[0080] The threaded hole 231 penetrates the inner cavity of the second positioning section 230 in the radial direction, that is, the threaded hole 231 communicates with the inner cavity of the second positioning section 230. The adjusting member 300 is rotatably installed in the threaded hole 231 and is screwed with the threaded hole 231. That is, the adjusting member 300 is arranged in the vertical direction of the second positioning member 200, and the adjusting member 300 can move in the radial direction of the second positioning member 200 when it rotates. After the second positioning section 230 is sleeved on the first positioning member 100, one end of the adjusting member 300 can abut against the outer wall of the first positioning member 100. In this way, the positioning between the first positioning member 100 and the second positioning member 200 can be achieved, so that the position of the outlet window 50 relative to the motor 40 is fixed, and the outlet window 50 is conveniently connected to the motor 40.

[0081] By tightening or loosening the adjusting member 300, the gap size between the inner wall of the second positioning section 230 and the outer wall of the first positioning member 100 can be adjusted. When the adjusting member 300 is operated, the adjusting member 300 drives the second positioning member 200 to move relative to the first positioning member 100. Since the motor 40 is positioned and installed in the first positioning member 100, the second positioning member 200 can drive the outlet window 50 to move relative to the motor 40 when it moves, so as to adjust the angle between the axis of the outlet window 50 and the axis of the impeller 60, thereby ensuring the relative position between the outlet window 50 and the impeller 60 is accurate.

[0082] When the adjusting member 300 is tightened, the adjusting member 300 continues to press the first positioning member 100. Since the position of the first positioning member 100 is fixed, the adjusting member 300 exerts a counterforce on the second positioning member 200, so that the second positioning section 230 corresponding to the adjusting member 300 moves away from the first positioning member 100, thereby increasing the gap between the second positioning member 200 and the first positioning member 100 at this position. When the adjusting member 300 is loosened, the adjusting member 300 exerts a smaller force on the first positioning member 100. Since the position of the first positioning member 100 is fixed, the adjusting member 300 exerts a smaller counterforce on the second positioning member 200, so that the second positioning member 200 moves toward the first positioning member 100, thereby reducing the gap between the second positioning member 200 and the first positioning member 100 at this position.

[0083] When the outlet window 50 is axially positioned with the motor 40 through the first step surface 110 and the second step surface 210, the outlet window 50 axially abuts against the motor 40. At this time, the position of the axis of the outlet window 50 relative to the axis of the impeller 60 is adjusted by the adjusting member 300. If the gap between the outlet window 50 and the impeller 60 at a certain position is too large, the adjusting member 300 at the position is loosened. If the gap between the outlet window 50 and the impeller 60 at a certain position is too small, the adjusting member 300 at the position is tightened. In this way, the relative position between the first positioning member 100 and the second positioning member 200 is adjusted, and then the position of the axis of the outlet window 50 relative to the axis of the impeller 60 is adjusted, so as to adjust the gap between the outlet window 50 and the impeller 60, and make the gap between the inner wall of the outlet window 50 and the impeller 60 uniform, that is, the outlet window 50 is coaxially arranged with the impeller 60, and the stability of the impeller 60 during rotation is ensured.

[0084] Referring to Figures 3 to 8 In an embodiment, the number of the threaded holes 231 is multiple, the multiple threaded holes 231 are arranged at intervals along the circumference of the second positioning member 200, and the number of the adjusting members 300 is multiple, each adjusting member 300 is installed in a threaded hole 231. That is, each threaded hole 231 is provided with an adjusting member 300, and an adjusting assembly is formed.

[0085] That is, the multiple threaded holes 231 are arranged around the circumference of the second positioning section 230, and the multiple threaded holes 231 are arranged at intervals. Correspondingly, the number of the adjusting members 300 is also multiple, and each threaded hole 231 is provided with an adjusting member 300. Each adjusting member 300 can be tightened or loosened in the corresponding threaded hole 231, so as to adjust the gap between the first positioning member 100 and the second positioning member 200 at the corresponding position. In this way, the multiple adjusting members 300 can adjust the angle of the axis of the outlet window 50 relative to the axis of the impeller 60 in multiple directions, so that the outlet window 50 is coaxial with the impeller 60, and the adjustment accuracy is improved.

[0086] Referring to Figures 3 to 8 In an embodiment, the multiple threaded holes 231 are uniformly distributed along the circumference of the second positioning member 200. That is, the multiple threaded holes 231 are uniformly distributed along the circumference of the second positioning member 200, and correspondingly, the multiple adjusting members 300 are also uniformly distributed after being installed in the corresponding threaded holes 231. Specifically, if the multiple adjusting members 300 are not uniformly arranged, the outlet window 50 and the impeller 60 need to be coaxial by operating the adjusting members 300 and rotating the second positioning member 200. After the multiple threaded holes 231 are uniformly distributed, the outlet window 50 and the impeller 60 can be coaxially arranged by operating the adjusting members 300, without rotating the second positioning member 200, and the adjustment difficulty is reduced.

[0087] In an embodiment, the number of the threaded holes 231 is even, and the axes of every two threaded holes 231 among the plurality of threaded holes 231 are coaxial. That is, after the threaded holes 231 are uniformly distributed, the axes of the two opposite threaded holes 231 are collinear, and the phase difference between them is 180°. In this way, when the adjusting member 300 on one side is tightened, the adjusting member 300 on the other side (i.e., the opposite side) that is 180° away from it can be loosened, which facilitates the adjustment of the gap between the impeller 60 and the outlet window 50 and improves the adjustment efficiency.

[0088] Exemplarily, the number of the threaded holes 231 is four, and the four threaded holes 231 are uniformly distributed along the circumference of the second positioning member 200. For ease of description, the four threaded holes 231 are referred to as a first threaded hole, a second threaded hole, a third threaded hole, and a fourth threaded hole. The four threaded holes 231 are uniformly distributed along the circumference of the second positioning member 200, the first threaded hole and the third threaded hole are oppositely arranged, the second threaded hole and the fourth threaded hole are oppositely arranged, and the phase difference between them is 180°. In this way, when the adjusting member 300 in the first threaded hole is tightened, the adjusting member 300 in the third threaded hole is loosened, when the adjusting member 300 in the second threaded hole is tightened, the adjusting member 300 in the fourth threaded hole is loosened. Of course, in other embodiments of the present application, the number of the threaded holes 231 can also be more, such as six, and the like.

[0089] Referring to Figures 3 to 8 In an embodiment, the plurality of adjusting members 300 that are spaced apart along the circumference of the second positioning member 200 form an adjusting assembly, the number of the adjusting assemblies is multiple, and the multiple adjusting assemblies are spaced apart along the axis of the second positioning member 200. That is, the threaded holes 231 are also arranged along the axis, so that the distance between the axis of the outlet window 50 and the axis of the impeller 60 can be adjusted, so that the axis of the outlet window 50 coincides with the axis of the impeller 60, and the stability of the rotation of the impeller 60 is ensured.

[0090] Referring to Figures 1 to 3 In an embodiment, the first positioning member 100 can be fixed to a welding machine (not shown in the figure). Specifically, the first positioning member 100 includes a positioning portion 120, a limiting portion 130, and a clamping portion 140 that are coaxially arranged and are all hollow structures. The limiting portion 130 is connected between the clamping portion 140 and the positioning portion 120, the positioning portion 120 is at least partially installed in the second positioning segment 230, the limiting portion 130 can abut against the welding machine, and the clamping portion 140 is clamped to the welding machine.

[0091] The limiting portion 130 is located between the positioning portion 120 and the clamping portion 140, and connects the positioning portion 120 and the clamping portion 140 through the limiting portion 130. Moreover, the positioning portion 120 can cooperate with the second positioning member 200, that is, the second positioning member 200 is sleeved outside the positioning portion 120, the adjusting member 300 is screwed with the first positioning member 100, and abuts against the outer wall of the second positioning member 200 to adjust the rotation angle of the second positioning member 200 relative to the first positioning member 100, that is, the angle of the axis of the outlet window 50 relative to the axis of the impeller 60 can be adjusted through the cooperation of the adjusting member 300 and the positioning portion 120.

[0092] The limiting portion 130 can abut against the welding machine to limit the first positioning member 100, so as to avoid the first positioning member 100 from sliding along the axial direction of the blood pump relative to the welding machine. The clamping portion 140 is clamped by the welding machine to further fix the first positioning member 100, so as to avoid the position of the first positioning member 100 from shifting. Specifically, the welding machine has a clamping structure similar to a three-jaw chuck or the like, and the clamping portion 140 is clamped by the clamping structure to fix the first positioning member 100.

[0093] Optionally, the positioning portion 120, the limiting portion 130 and the clamping portion 140 are integrated structures. In this way, the structural strength of the assembling device 10 of the blood pump can be ensured. Optionally, the outer wall of the limiting portion 130 protrudes radially from the positioning portion 120 and the clamping portion 140. Optionally, the positioning portion 120, the limiting portion 130 and the clamping portion 140 are cylindrically arranged. Of course, in other embodiments of the present application, the cross section of the limiting portion 130 can also be polygonal or the like.

[0094] Referring to Figure 3 and Figure 10 In an embodiment, the inner wall of the positioning portion 120 has a coaxially arranged third aperture 121 and a fourth aperture 122, the diameter of the third aperture 121 is larger than the diameter of the fourth aperture 122, so as to form the first step surface 110. In Figure 10 , the diameter of the third aperture 121 is smaller than the diameter of the fourth aperture 122, so as to form the step-shaped first step surface 110 at the connection between the third aperture 121 and the fourth aperture 122. After the motor 40 is installed on the positioning portion 120, the first step surface 410 of the outer wall of the motor 40 abuts against the first step surface 110, so as to realize the axial positioning of the motor 40.

[0095] Referring to Figure 1 In an embodiment, the positioning portion 120 has a first wire outlet hole 123, and the clamping portion 140 has a second wire outlet hole (not shown), the first wire outlet hole 123 penetrates to the inner wall of the positioning portion 120 along the radial direction, and the second wire outlet hole is arranged along the axial direction. The first wire outlet hole 123 and the second wire outlet hole are used for the wiring of the blood pump cable.

[0096] The assembling device 10 of the blood pump of the above embodiment, the first positioning member 100 is axially limited to the motor 40 through the first step surface 110, the second positioning member 200 is axially limited to the outlet window 50 through the second step surface 210, one end of the motor 40 is provided with the impeller 60, after the second positioning member 200 is sleeved on one end of the first positioning member 100, the outlet window 50 can be axially abutted with the motor 40, the preliminary positioning of the outlet window 50 and the motor 40 is realized. The adjusting member 300 is matched with the threaded hole 231 of the second positioning member 200, and can abut with the outer wall of the first positioning member 100, when the adjusting member 300 is driven, the angle between the axis of the second positioning member 200 and the axis of the first positioning member 100 can be adjusted, so that the position of the axis of the outlet window 50 relative to the axis of the impeller 60 is adjusted, so that the outlet window 50 is coaxially arranged with the impeller 60, and the stability of the rotation of the impeller 60 is ensured.

[0097] Referring to Figures 1 to 12 The application also provides a manufacturing method of a blood pump, which is applied to the assembling device 10 of the blood pump of any one of the above embodiments, and comprises the following steps:

[0098] S100, the motor 40 is placed in the first limiting hole 150 of the first positioning member 100, and one end of the motor 40 is provided with the impeller 60;

[0099] S200, the outlet window 50 is placed in the second limiting hole 240 of the second positioning member 200, and the outlet window 50 is sleeved on the impeller 60;

[0100] S300, the second positioning member 200 is sleeved and abutted on one end of the first positioning member 100, so as to axially position the motor 40 and the outlet window 50;

[0101] S400, the adjusting member 300 is driven to make the outlet window 50 coaxial with the impeller 60;

[0102] S500, the connection between the motor 40 and the outlet window 50 is connected through the opening 223.

[0103] When the assembling device 10 of the blood pump of the application is assembled, the motor 40 is placed in the first positioning member 100, the outlet window 50 is placed in the second positioning member 200, then, after the first positioning member 100 is sleeved on the end of the second positioning member 200, the outlet window 50 is arranged on the motor 40, through the abutment of the motor 40 and the first step surface 110 and the abutment of the outlet window 50 and the second step surface 210, the axial abutment positioning of the outlet window 50 and the motor 40 can be realized, at this time, the outlet window 50 and the motor 40 are connected, the axial position of the outlet window 50 and the motor 40 is accurate, so that the position of the outlet window 50 and the impeller 60 is accurate.

[0104] After the first positioning member 100 is assembled with the second positioning member 200 so that the outlet window 50 axially abuts against the motor 40, it cannot be ensured that the axis of the outlet window 50 coincides with the axis of the impeller 60. At this time, the adjusting member 300 is driven, and the adjusting member 300 can change the position of the second positioning member 200 relative to the first positioning member 100 to adjust the angle of the axis of the outlet window 50 relative to the axis of the impeller 60, so that the outlet window 50 is coaxial with the impeller 60. The driving mode of the adjusting member 300 can be manual tightening or loosening, and can also be tightening or loosening through a mechanical hand or the like.

[0105] In an embodiment, the adjusting member 300 drives the outlet window 50 to be coaxial with the impeller 60, including the following steps:

[0106] The adjusting member 300 is driven to adjust the position of the axis of the outlet window 50 relative to the axis of the impeller 60;

[0107] A rod-shaped measuring tool (not shown in the figure) is inserted into the gap between the impeller 60 and the inner wall of the outlet window 50, and is rotated around the axis of the impeller 60 for one revolution;

[0108] When the measuring tool does not contact the impeller 60, the outlet window 50 is coaxial with the impeller 60;

[0109] When the measuring tool contacts the impeller 60, the adjusting member 300 is continuously driven, and the measuring tool is rotated until the measuring tool does not contact the impeller 60.

[0110] In the judgment of whether the outlet window 50 is coaxial with the impeller 60, after the adjusting member 300 adjusts the position of the axis of the outlet window 50 relative to the axis of the impeller 60, the rod-shaped measuring tool is inserted between the impeller 60 and the inner wall of the outlet window 50, and the measuring tool is rotated around the impeller 60 along the inner wall of the outlet window 50 for one revolution. Specifically, the diameter of the measuring tool is adapted to the gap between the impeller 60 and the inner wall of the outlet window 50 when the impeller 60 and the outlet window 50 are coaxial. In this embodiment, the measuring tool is a round rod, and its diameter is slightly smaller than the gap between the impeller and the outlet window in the coaxial arrangement.

[0111] If the measuring tool does not touch the impeller 60 during rotation, it indicates that the outlet window 50 is coaxial with the impeller 60. If the rotating tool touches the impeller 60 during rotation, it indicates that the outlet window 50 is not coaxial with the impeller 60. At this time, the adjusting member 300 is driven to adjust the position of the axis of the outlet window 50 relative to the axis of the impeller 60, and then the measuring tool is rotated again until the measuring tool does not touch the impeller 60 during rotation, which indicates that the outlet window 50 is coaxial with the impeller 60. The method of measuring whether the outlet window 50 is coaxial with the impeller 60 by the measuring tool is convenient for user operation, and improves the manufacturing efficiency of the blood pump.

[0112] Referring toFigure 3 In an embodiment, the adjusting member 300 is driven to adjust the position of the axis of the outlet window 50 relative to the axis of the impeller 60, at least including the following steps:

[0113] If the gap between the impeller 60 and the inner wall of the outlet window 50 is the smallest, the adjusting member 300 corresponding to the smallest gap is tightened, and the adjusting member 300 180° away from the adjusting member 300 is loosened;

[0114] If the gap between the impeller 60 and the inner wall of the outlet window 50 is the largest, the adjusting member 300 corresponding to the smallest gap is loosened, and the adjusting member 300 180° away from the adjusting member 300 is tightened.

[0115] A rotation measuring tool is used to measure the gap between the impeller 60 and the inner wall of the outlet window 50. If the gap between the impeller 60 and the inner wall of the outlet window 50 is the smallest, the adjusting member 300 corresponding to the smallest gap is tightened, and the adjusting member 300 180° away from the adjusting member 300 is loosened to increase the gap in size between the impeller 60 and the inner wall of the outlet window 50, so that the gap between the impeller 60 and the outlet window 50 is uniform. If the gap between the impeller 60 and the inner wall of the outlet window 50 is the largest, the adjusting member 300 corresponding to the smallest gap is loosened, and the adjusting member 300 180° away from the adjusting member 300 is tightened to reduce the gap in size between the impeller 60 and the inner wall of the outlet window 50, so that the gap between the impeller 60 and the outlet window 50 is uniform. Through the adjusting operation of the adjusting member 300, the gap between the impeller 60 and the outlet window 50 can be conveniently adjusted, so that the gap between the impeller 60 and the outlet window 50 is uniform, and the impeller 60 and the outlet window 50 are coaxial, thereby ensuring the stability of the rotation of the impeller 60.

[0116] The manufacturing method of the blood pump can realize the rapid assembly of the outlet window 50 and the motor 40, so that the outlet window 50 is reliably mounted on the motor 40, and can simplify the assembly steps of the outlet window 50 and the motor 40, and facilitate operation. Moreover, the manufacturing method of the blood pump can adjust the relative position of the outlet window 50 and the impeller 60, reduce the assembly error between the motor 40 and the outlet window 50, so that the impeller 60 and the outlet window 50 are coaxial, thereby ensuring the stability of the rotation of the impeller 60.

[0117] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments are described, but it should be considered that any combination of the technical features is within the scope of the present disclosure as long as the combination does not result in a contradiction.

[0118] The above embodiments only express several implementation ways of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An assembling device of a blood pump, the blood pump comprising a motor and an outlet window, one end of the motor being provided with an impeller, the outlet window being assembled to one end of the motor and surrounding the impeller, characterized in that, The assembling device of the blood pump comprises: a first positioning member having a first limiting hole capable of limiting the motor, a hole wall of the first limiting hole abutting against the motor; a second positioning member having a second limiting hole capable of limiting the outlet window, a hole wall of the second limiting hole abutting against the outlet window to press the outlet window along an axial direction of the second positioning member against the motor, the second positioning member being provided with an opening in communication with the first limiting hole to expose a connection position of the motor and the outlet window; and an adjusting member penetrating one of the first positioning member and the second positioning member and abutting against the other one, the adjusting member being capable of adjusting a position of the first positioning member relative to the second positioning member, so that the outlet window is coaxial with the impeller.

2. The assembly device of a blood pump according to claim 1, characterized in that The second positioning member comprises a first positioning segment and a second positioning segment connected with each other, the first positioning segment having the second limiting hole, and the second positioning segment being sleeved on the first positioning member to limit the first positioning member.

3. The assembly device of a blood pump according to claim 2, characterized in that The second limiting hole has a first inner diameter segment and a second inner diameter segment coaxially arranged, an inner diameter of the first inner diameter segment being matched with an outer diameter of the outlet window, and an inner diameter of the second inner diameter segment being greater than that of the first inner diameter segment to enable a part of the motor to extend into the second inner diameter segment. The second positioning segment has an inner diameter greater than that of the first positioning segment. The second positioning segment has an outer diameter greater than that of the first positioning segment.

4. The assembly of a blood pump according to claim 2, characterized in that The first positioning segment comprises a first inner circumferential surface, the second positioning segment comprises a second inner circumferential surface, an inner diameter of the second inner circumferential surface being greater than that of the first inner circumferential surface, the second positioning member further comprising a limiting surface connected between the first inner circumferential surface and the second inner circumferential surface, and a gap being formed between the first positioning member and the limiting surface.

5. The assembly device of a blood pump according to claim 4, characterized in that The first positioning member comprises an end surface, a gap between the end surface and the limiting surface being g, the adjusting member penetrating the second positioning member along a radial direction of the second positioning member, and a distance from an axis of the adjusting member to the limiting surface being L, wherein g is greater than or equal to 0.25 mm and less than or equal to L.

6. The assembly of a blood pump according to claim 1, characterized in that The second positioning member comprises a first positioning segment and a second positioning segment connected with each other, the second positioning segment being sleeved on the first positioning member, the second positioning segment having a threaded hole penetrating an inner cavity of the second positioning segment along a radial direction of the second positioning member, the adjusting member being matched with the threaded hole and abutting against an outer wall of the first positioning member.

7. The assembly device of a blood pump according to claim 6, characterized in that The number of the threaded holes is multiple, the multiple threaded holes being arranged at intervals along a circumferential direction of the second positioning member, and the number of the adjusting members being multiple, each adjusting member being installed in one threaded hole to adjust a gap between the first positioning member and the second positioning member at a corresponding position.

8. The assembly device of a blood pump according to claim 7, characterized in that The multiple threaded holes are uniformly distributed along the circumferential direction of the second positioning member. The number of the threaded holes is even, and axes of every two threaded holes among the multiple threaded holes are coaxial. And / or, a plurality of the adjusting members arranged along the circumference of the second positioning member form an adjusting assembly, the number of the adjusting assemblies is multiple groups, and the multiple groups of the adjusting assemblies are arranged along the axial direction of the second positioning member.

9. The assembly of a blood pump according to any one of claims 1 to 8, characterized in that The first positioning member can be fixed to a welding machine, the adjusting member is in threaded cooperation with the first positioning member, and the adjusting member abuts against the outer wall of the second positioning member to adjust the rotation angle of the second positioning member relative to the first positioning member.

10. A method of manufacturing a blood pump, characterized by, The application relates to an assembling device for a blood pump according to any one of claims 1 to 9, and a manufacturing method of the blood pump. The motor is arranged in the first limiting hole of the first positioning member, one end of the motor is provided with an impeller; The outlet window is arranged in the second limiting hole of the second positioning member, and the outlet window is sleeved on the impeller; The second positioning member is sleeved on and abuts against one end of the first positioning member to axially position the motor and the outlet window; The adjusting member is driven to make the outlet window coaxial with the impeller; The motor and the outlet window are connected at the connection position through the opening.

11. The manufacturing method of a blood pump according to claim 10, characterized by, The adjusting member is driven to make the outlet window coaxial with the impeller, and the method comprises the following steps: The adjusting member is driven to adjust the angle between the axis of the first limiting hole and the axis of the second limiting hole; A rod-shaped measuring tool is inserted into the gap between the impeller and the inner wall of the outlet window and is rotated around the axis of the impeller for one circle; When the measuring tool does not contact the impeller, the outlet window is coaxial with the impeller; When the measuring tool contacts the impeller, the adjusting member is continuously driven, and the measuring tool is rotated until the measuring tool does not contact the impeller.

12. The manufacturing method of a blood pump according to claim 11, characterized by, The adjusting member is driven to adjust the angle between the axis of the first limiting hole and the axis of the second limiting hole, and the method comprises at least the following steps: If the gap between the impeller and the outlet window is the smallest, the adjusting member corresponding to the position with the smallest gap is tightened, and the adjusting member which is 180 degrees away from the adjusting member is loosened; If the gap between the impeller and the outlet window is the largest, the adjusting member corresponding to the position with the smallest gap is loosened, and the adjusting member which is 180 degrees away from the adjusting member is tightened.

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