Drive mechanism and blood pump

Abstract

To provide a simple drive mechanism and blood pump. [Solution] The drive mechanism includes a housing, a rotating shaft, a rotor, a first shaft sleeve, a second shaft sleeve, and a stopper member. The rotating shaft is rotatably mounted to the housing. The rotating shaft has a connecting end configured to connect to an impeller and a ball head end that is away from the connecting end. The rotor is fixedly connected to the rotating shaft. A groove is formed in the first shaft sleeve. The rotating shaft is provided rotatably through the second shaft sleeve. The ball head end is movably provided in the groove. The stopper member is fixedly connected to at least one of the rotating shaft and the rotor and can abut against the second shaft sleeve.

Description

Technical Field

[0001] (Cross - reference to related applications) This application claims the priority of the Chinese patent application with the application number CN202 210800376.5 filed with the China National Intellectual Property Administration on July 8, 2022, and the priority of the Chinese patent application with the application number CN202210977269.X filed with the China National Intellectual Property Administration on August 15, 2022, and all of its content is incorporated herein by reference.

[0002] (Technical Field)(Technical Field) This application relates to the technical field of medical devices, particularly to drive mechanisms and blood pumps.

Background Art

[0003] Blood pumps are designed to be inserted percutaneously into a patient's blood vessels, such as the arteries or veins in the thigh or axilla, and can be inserted into the patient's heart to function as a left ventricular assist device or a right ventricular assist device. Therefore, blood pumps may also be referred to as intracardiac blood pumps or intravascular blood pumps.

[0004] Blood pumps typically have a drive mechanism and an impeller, and the impeller is connected to the drive shaft of the drive mechanism. In order to achieve stable rotation of the drive shaft, it is usually necessary to provide a structure for positioning or limiting the position of the drive shaft, which makes the structure of the drive mechanism complex.

Summary of the Invention

Problems to be Solved by the Invention

[0005] Based on this, this application provides a drive mechanism and a blood pump with a simple structure.

Means for Solving the Problems

[0006] An embodiment of the first aspect of the present application comprises a housing, a rotating shaft, a rotor, a first shaft sleeve, and A drive mechanism including a second shaft sleeve and a stopper member, wherein the rotating shaft is the housing A connecting end is rotatably mounted on the ring and configured to be connected to the impeller, The first axial sleeve and the second axial sleeve have a ball head end that is separated from the connecting end, and the first axial sleeve and the second axial sleeve have a ball head end that is separated from the connecting end. Both sides of the shaft are attached to the housing, and a groove is formed in the first shaft sleeve. The groove has a recessed spherical wall, and the rotating shaft rotatably penetrates the second shaft sleeve. The ball head end is provided in the groove and is movable and can contact the spherical wall. The rotor is capable of being positioned between the first shaft sleeve and the second shaft sleeve, and The stopper member is fixedly connected to at least one of the rotating shaft and the rotor. And, located between the rotor and the second shaft sleeve, and capable of contacting the second shaft sleeve. It provides a certain drive mechanism.

[0007] An embodiment of the second aspect of this application includes an impeller and the drive mechanism described in the first aspect, the above (i) The propeller is connected to the connecting end of the rotating shaft and can rotate along the rotating shaft. , provides a blood pump.

[0008] Details of one or more embodiments of the present invention are described in the following drawings and description. Other features, purposes, and advantages will become apparent from the specification, drawings, and claims. .

[0009] In order to more clearly explain the technical concept in the embodiments of this application, the following will be described in the embodiments or prior art. A brief introduction to the diagrams necessary for explaining the procedure is provided below. As is clear from the following explanation, the diagrams are from this book. These are just some examples of the application, and for those skilled in the art, other drawings can be obtained based on these drawings without creative effort. These are sectional views, from another angle, of the blood pump shown in FIG. 1 with the cannula, impeller, and some catheters omitted.

Brief Description of the Drawings

[0010] [Figure 1] It is a schematic structural diagram of a blood pump according to an embodiment of the present invention. [Figure 2] It is a sectional view of the blood pump shown in FIG. 1 with the cannula, impeller, and some catheters omitted. [Figure 3] It is a partially enlarged view of the blood pump shown in FIG. 2. [Figure 4] It is a sectional view of the rotating shaft, stopper member, rotor, first shaft sleeve, and second shaft sleeve shown in FIG. 1 assembled together. [Figure 5] It is a partially enlarged view of part A shown in FIG. 4. [Figure 6] It is a schematic structural diagram of the rotating shaft of the blood pump shown in FIG. 1. [Figure 7] It is a schematic structural diagram of the rotor, stator, and magneto-permeable member of the blood pump shown in FIG. 1 assembled together. [Figure 8] [[ID=३१]]It is a schematic structural diagram of the second rotor shown in FIG. 7 and one magnetic permeable plate of the magnetic permeable member assembled together. [Figure 9] It is a schematic structural diagram of the first flywheel of the first rotor among the rotors shown in FIG. 7. [Figure 10] It is a partially enlarged view of part B shown in FIG. 2. [Figure 11] It is a schematic structural diagram of the first shaft sleeve of the blood pump shown in FIG. 2. [Figure 12] It is a sectional view of the second shaft sleeve shown in FIG. 11. [Figure 13] It is a sectional view, from another angle, of the blood pump shown in FIG. 1 with the cannula, impeller, and some catheters omitted. [Figure 14] It is a partially enlarged view of part C shown in FIG. 13. [Figure 15] It is a schematic structural diagram of the support seat of the blood pump shown in FIG. 13. [Figure 16] Figure 2 is a schematic diagram of the structure of the second axis sleeve of the blood pump shown. [Figure 17] This is a schematic diagram of the structure of a blood pump according to an embodiment of the present invention. [Figure 18] Figure 17 is an exploded view of the blood pump. [Figure 19] Figure 17 is a schematic diagram of the structure of the blood pump cannula assembly. [Figure 20] This is a magnified view of section D shown in Figure 19. [Figure 21] Figure 19 is a schematic diagram of the connecting tube structure of the cannula assembly shown. [Figure 22] Figure 21 is a schematic diagram of the internal structure of the connecting pipe. [Figure 23] Figure 21 is a schematic diagram of the internal structure of the connecting pipe. [Figure 24] Figure 17 is an exploded view of the blood pump, with the insertion tube and connecting tube omitted. [Figure 25] This is another exploded view of the blood pump shown in Figure 17, with the insertion tube and connecting tube omitted. [Figure 26] Figure 17 is a cross-sectional view of the blood pump shown, with the insertion tube, connecting tube, and some catheters omitted. [Figure 27] Figure 26 is a magnified view of section E. [Figure 28] Figure 26 is a schematic diagram of the assembled structure consisting of the rotating shaft, the first shaft sleeve, and the second shaft sleeve. [Figure 29] Figure 28 is a schematic diagram showing the assembled structure of the first shaft sleeve and some of the rotating shafts. [Figure 30] This figure shows the positional relationship between the rotating shaft and the second shaft sleeve when runout occurs in the rotating shaft shown in Figure 28. [Figure 31] This is a cross-sectional view of the first axial sleeve shown in Figure 26. [Figure 32] Figure 26 is a schematic diagram of the support base structure. [Figure 33] Figure 26 is a schematic diagram of the structure of the second axial sleeve. [Figure 34]Figure 26 is a schematic diagram of the structure of the first rotor. [Figure 35] Figure 26 is a schematic diagram of the structure of the second rotor. [Figure 36] Figure 26 is an exploded view of the stator and permeable member. [Modes for carrying out the invention]

[0011] The following is a more detailed explanation of the purpose, technical proposal, and advantages of this application, referencing the attached drawings and practical drawings. The present application will be described in more detail with reference to the examples. The specific examples described herein are It is understood that this is solely for the purpose of interpreting this application and not to limit it. It should be done.

[0012] Furthermore, when an element is said to be "fixed" or "attached" to another element, the other element It may be directly present in or indirectly present in the other element. One element may be "contact" with another element. When referred to as "connected to," it means that it is directly connected to another element or indirectly connected to that other element. It may also be connected to it.

[0013] Furthermore, the terms "first" and "second" are merely for explanatory purposes and do not represent relative importance. It is understood to indicate or suggest sex, or implicitly indicate the number of technical features that are shown. It should not be done. Therefore, the features defined as "first" and "second" are one or more of the same. Features may be explicitly or implicitly included. In the description of this application, "plural" is used without further explanation. Unless otherwise specified, it means two or more.

[0014] The following will explain the technical means of this application with reference to specific drawings and embodiments. I will reveal it.

[0015] In interventional medicine, the end of the instrument closest to the operator is usually called the near end, and the end furthest from the operator is called the near end. One end is defined as the far end.

[0016] The drive mechanism 10 and blood pump 1 in embodiments of the present invention will be described below.

[0017] Referring to Figure 1, the blood pump 1 includes a drive mechanism 10 and an impeller 20, and the drive mechanism The 10 is powered by the impeller 20, and the drive mechanism 10 drives the rotation of the impeller 20. Specifically, the blood pump 1 is fixedly connected to the far end of the drive mechanism 10. The cannula 40 is further included. The impeller 20 is rotatably housed within the cannula 40. The cannula 40 has a blood outlet 41 and a blood inlet 42. The impeller 20 rotates. When turned, blood flows from the blood inlet 42 into the cannula 40, and then into the blood outlet 41 It flows out through. In one embodiment, the cannula 40 is connected to a heart valve, for example, the aortic valve. The membrane extends and is inserted, the blood inlet 42 is located inside the heart, and the blood outlet 41 and drive mechanism Structure 10 is located in a blood vessel outside the heart, such as the aorta. Specifically, the blood pump 1 is driven by The structure 10 further includes a catheter 50 connected to its proximal end. The catheter 50 is supplied with various types of supplies. The lines are housed. For example, the supply line is a conductor for electrical connection with the drive mechanism 10. It also includes a washing line for passing a washing solution through the blood pump 1. Preferably, the washing solution is raw These include saline solution, heparin-containing saline solution, or glucose.

[0018] Referring to Figures 2 to 6, the drive mechanism 10 consists of a housing 100, a rotating shaft 200, and Theta 300, rotor 400, first shaft sleeve 510, second shaft sleeve 520, Includes a stopper member 600. The housing 100 is a cylindrical housing with both ends generally open. The housing 100 is fixedly connected at its distal end to the cannula 40, and at its proximal end to the catheter. It is permanently connected to the tel 50. The housing 100 has a chamber. Specifically, A partition ring 120 is provided inside the housing 100, and the partition ring 120 is The chamber of G100 is divided into a position-restricting chamber 112 and a containment chamber 114. In this embodiment, the position limiting chamber 112 and the housing chamber 114 are located in the housing 100. It is provided along the axial direction.

[0019] The rotating shaft 200 is elongated. The rotating shaft 200 is rotatably mounted in the housing 100. The rotating shaft 200 is attached to a connecting end 210 configured to connect to the impeller 20. It has a ball head end 220 that is separated from the connecting end 210. In the illustrated example, rotation The shaft 200 extends generally along the axial direction of the housing 100, or along the axis of the rotating shaft 200. The direction of extension of the housing 100 is roughly the same as the axial direction of the housing 100. Position limiting chamber 112 and The housing chamber 114 is located along the axis of the rotating shaft 200. The rotating shaft 200 is located It is provided through the placement restriction chamber 112, and a portion of it is housed in the containment chamber 114, and a portion The rotating shaft 2 is located outside the housing 100, or a portion of it extends inside the cannula 10. The portion of 00 that extends outside the housing 100, or the portion that extends inside the cannula 10, The connecting end 210 of the rotating shaft 200 and the ball head end 220 are located within the housing chamber 114. It is positioned so that the impeller 20 can rotate along the rotation axis 200. The ra 20 is fixedly connected to the connecting end 210. In some embodiments, the rotating shaft 20 0 is made of ceramic material. Compared to metal materials, ceramics have higher processing precision and raw It has high conformability and mechanical strength, as well as good wear resistance and corrosion resistance.

[0020] The stator 300 is fixedly attached to the housing 100, that is, the stator 300 It is provided in the chamber of the housing 100. In the illustrated embodiment, the stator 300 It is located within the housing chamber 114. The rotating shaft 200 rotatably penetrates the stator 300. It is provided through. The rotor 400 is located inside the housing 100, that is, the rotor 400 It is also provided inside the chamber of the housing 100. In the illustrated embodiment, the rotor 400 is It is located within the containment chamber 114. The rotor 400 is fixedly connected to the rotating shaft 200. The stator 300 can drive the rotation of the rotor 400, and the rotor 400 rotates It can drive the rotation of shaft 200. Specifically, the rotor 400 has magnetism and Theta 300 can generate a rotating magnetic field that drives the rotation of the rotor 400.

[0021] Referring to Figure 7, in the illustrated embodiment, the rotor 400 is the first rotor 410 and The system includes two rotors 420, with the first rotor 410 and the second rotor 420 both having a rotating shaft 20 It is fixedly connected to 0. The first rotor 410 and the second rotor 420 are both housings The first rotor 420 and the second rotor are rotatably housed within the housing chamber 114 of the G 100. The rotor 420 is mounted along the axis of the rotating shaft 200. The stator 300 is the first rotor. It is located between rotor 410 and the second rotor 420. The first rotor 410 and the second rotor 420 are Both possess magnetism, and the stator 300 rotates the first rotor 410 and the second rotor 420. It can generate a rotating magnetic field that drives the rotation. Specifically, the first rotor 410 is the first The first magnet 411 is fixedly connected to the rotating shaft 200. 11 is a ring-shaped Halbach array magnet. Specifically, the first rotor 410 is the first flare The first flywheel 412 further includes a first flywheel 412 fixed to the rotating shaft 200 The first magnet 411 is fixedly connected to the first flywheel 412. By providing the wywheel 412, the connection strength between the first magnet 411 and the rotating shaft 200 is improved. This can be improved, and the vibration of the rotating shaft 200 during rotation can be reduced, Thus, the entire rotating shaft 200 becomes more stable during rotation.

[0022] Referring to Figure 9, specifically, the first flywheel 412 is connected to the first internal tube 4121. It includes a first disk section 4122 and a first outer ring wall 4123, and a first internal tube 4121 and a first Both the outer ring wall 4123 and the first disk portion 4122 have a circular tubular structure, and the first disk portion 4122 has an annular disc structure. Yes. The first internal tube 4121 and the first outer ring wall 4123 are both connected to the first disk section 4122. It is fixedly connected. The first outer ring wall 4123 surrounds the first disk portion 4122. The first internal tube 4121 and the first outer ring wall 4123 are provided coaxially, and the rotation axis 200 is provided penetrating into the first internal tube 4121 and is fixedly in contact with the first internal tube 4121. The first annular chamber 4124 is located between the first internal tube 4121 and the first outer ring wall 4123. A first magnet 411 is housed in the first annular chamber 4124. The shape of the canvas 4124 is such that the mounting and positioning of the first magnet 411 is facilitated. Align with the first magnet 411. In this way, the first flywheel 412 aligns with the first magnet 41 It can perform a position-limiting effect on 1 and facilitate the installation of the first magnet 411. Furthermore, it makes the coupling between the first magnet 411 and the first flywheel 412 more stable.

[0023] Furthermore, the first flywheel 412 is not limited to the above structure, and in several embodiments, In some embodiments, the first flywheel 412 does not have a first outer ring wall 4123. The first flywheel 412 has a first outer ring wall 4123 and a first internal tube 4121. In this case, the rotating shaft 200 is fixedly installed to penetrate the center of the first disk portion 4122. It can be done. Compared to the first flywheel 412 which has only the first disc portion 4122, the first By providing the internal tube 4121, the first flywheel 412 and the rotating shaft 200 are made more stable. The second rotor 420 includes a second magnet 421 and a second magnet 42 1 is fixedly connected to the rotating shaft 200. Specifically, the second magnet 421 is connected to the annular hull. It is a Bach array magnet. Specifically, the second rotor 420 connects to the second flywheel 422. Furthermore, the second flywheel 422 is fixedly connected to the rotating shaft 200, and the second magnet 421 is fixed to the second flywheel 422. This makes it possible to increase the connection strength between the second magnet 421 and the rotating shaft 200, Furthermore, it is possible to reduce the shaking of the rotating shaft 200 during rotation, and the entire rotating shaft 200 is... It becomes more stable.

[0024] Specifically, referring to Figure 4, the second flywheel 422 is connected to the second internal tube 4221. It includes a second disk section 4222 and a second outer ring wall 4223, and a second internal tube 4221 and a second Both the outer ring wall 4223 and the second disk portion 4222 have a circular tubular structure, and the second disk portion 4222 has an annular disc structure. Yes. The second internal tube 4221 and the second outer ring wall 4223 are both connected to the second disk section 4222. It is fixedly connected. The second outer ring wall 4223 surrounds the second disk portion 4222. The second internal tube 4221 and the second outer ring wall 4223 are provided, and both are provided coaxially and rotate The shaft 200 is installed penetrating the second internal tube 4221 and is fixed to the second internal tube 4221. They are connected. A second annular chamber is formed between the second internal tube 4221 and the second outer ring wall 4223. The second magnet 421 is housed in the second annular chamber. This is designed to facilitate the attachment and positioning of the second magnet 421, and is shaped to fit the second magnet 421. In this way, the second flywheel 422 exerts a positional constraint on the second magnet 421. It can serve its purpose and facilitates the installation of the second magnet 421, as well as the second magnet 4 This further stabilizes the connection between 21 and the second flywheel 422.

[0025] Furthermore, the second flywheel 422 is not limited to the above structure, and in several embodiments... In some embodiments, the second flywheel 422 does not have a second outer ring wall 4223. Furthermore, the second flywheel 422 has a second outer ring wall 4223 and a second internal tube 4221. In this case, the rotating shaft 200 is fixedly installed to penetrate the center of the second disk portion 4222. It can be done. Compared to the second flywheel 422 which has only the second disc portion 4222, the second By providing the internal tube 4221, the second flywheel 422 and the rotating shaft 200 are made more stable. It can be connected in this way.

[0026] Specifically, the stator 300 is a first stator located along the axis of the rotating shaft 200. The first stator unit 310 includes a unit 310 and a second stator unit 320, and the first stator unit 310 is The first rotor 410 can be driven to rotate, and the second stator unit 320 is the second The rotation of the rotor 420 can be driven. Specifically, the first stator unit 310 It can generate a rotating magnetic field that drives the rotation of the first rotor 410, and the second stator unit The nit 320 can generate a rotating magnetic field that drives the rotation of the second rotor 420. The first stator unit 310 and the second stator unit 320 are both housed in housing 1 It is fixedly housed in the housing chamber 114 of 00. The rotating shaft 200 is the first stator unit It is rotatably mounted through the 310 and the second stator unit 320. The rotor unit 310 and the second stator unit 320 are both connected to the first rotor 410 and the second rotor unit 320. It is located between the two rotors, the 420.

[0027] The first stator unit 310 and the second stator unit 320 both have a magnetic core and It includes a coil, which is wound around a magnetic core. Specifically, the first stator unit 31 0 includes a first magnetic core 312 and a first coil 313, and the first coil 313 is a first magnetic It is wound around the first magnetic core 312. There are multiple first magnetic cores 312, and multiple first magnetic cores 31 2 is provided around the axis of the rotation shaft 200. Each first magnetic core 312 has one A first coil 313 is provided. The structure of the second stator unit 320 is as follows: It is the same as the knit 310. Referring to Figure 8, the second stator unit 320 is the second magnetic It includes a gas core 322 and a second coil 323, the second coil 323 being connected to the second magnetic core 322 It is wrapped around. There are multiple second magnetic cores 322, and the multiple second magnetic cores 322 are connected to the rotating axis. It is arranged around the axis of 200. Each second magnetic core 322 has one second coil 3 23 is established.

[0028] Specifically, the drive mechanism 10 is a permeable member 700 fixedly connected to the housing 100. The first stator unit 310 further includes the first magnetic core 312 and the second stator unit The second magnetic core 322 of the 320 is fixedly connected to the permeable member 700. In terms of structure, the permeable member 700 is fixedly housed within the housing 100, for example, the housing It is locked to the inner wall of the ring 100. The rotating shaft 200 rotatably penetrates the permeable member 700. It is provided as follows. One end of the first magnetic core 312 is fixedly connected to the permeable member 700, and the first The rotor 410 is provided in close proximity to the other end of the first magnetic core 312, and the second magnetic core 423 One end is fixedly connected to the permeable member 700, and the second rotor 420 is connected to the second magnetic core 322 It is provided in close proximity to the other end.

[0029] The permeable member 700 plays a role in closing the magnetic path, promoting and increasing the generation of magnetic flux and coupling it. To improve performance, the permeable member 700 is provided with the first stator unit 310. The magnetic path between the first rotor 410 and the second stator unit 320 and the second rotor 420 The permeable member 700 plays a role in closing the magnetic path between them and can increase the magnetic flux. Providing this is advantageous in reducing the overall diameter of the drive mechanism 10. The first magnetic core 312 of the stator unit 310 and the second magnetic core of the second stator unit 320 By permanently connecting both sides of the gas core 322 to the permeable member 700, the first stator unit This enables the positioning and mounting of the 310 and the second stator unit 320. The difficulty of assembling the first stator unit 310 and the second stator unit 320 is reduced. At the same time, the permeable member 700 provided as described above is a positioning structure within the housing 100. This also reduces the number of components to be installed, simplifies the structure of the housing 100, and reduces the overall size of the drive mechanism 10. To simplify the assembly process.

[0030] Specifically, the permeable member 700 includes two permeable plates 710, and the two permeable plates 710 are The layers are stacked, and one of the permeable plates 710 is connected to the first magnetic core 312 of the first stator unit 310. Fixedly connected, the other permeable plate 710 is connected to the second magnetic core of the second stator unit 320. Fixedly connected to 322, the rotating shaft 200 rotatably penetrates the two permeable plates 710. It is provided. Specifically, the two permeable plates 710 are separate before assembly, and the permeable member 7 By providing 00 as two separate permeable plates 710 before assembly, the drive mechanism 1 When assembling the 0, first the first magnetic core 312 is fixedly connected to the permeable plate 710, and the second magnetic The gas core 322 is fixedly connected to another permeable plate 710, and then the two permeable plates 710 are stacked. This allows the first magnetic core 312 and the second magnetic core 322 to be connected to two transparent It is convenient to assemble the magnetic plate 710, and the first magnetic core 321 and the second magnetic core 322 Assembly will be easier.

[0031] Specifically, the two permeable plates 710 are fixedly connected, so the first stator unit The 310, the second stator unit 320, and the permeable member 700 are integrated into the housing. It can be assembled within 100, making the assembly of the stator 300 easier. For example, two The magnetic permeable plates 710 may be connected by adhesive or welding. In other embodiments, The two permeable plates 710 are not fixedly connected but are in contact with each other. The material 700 is not limited to a method of combining the two separate permeable plates 710 described above, but is permeable The member 700 may have a plate-like structure, and the first magnetic core 231 and the second magnetic core 241 are Both are connected to the permeable member 700, that is, the first stator unit 310 and the second stator The data unit 320 shares one permeable member 700.

[0032] Specifically, the material of the permeable plate 710 is silicon steel, and the first magnetic core 312 and the second magnetic The material of the air core 322 is silicon steel.

[0033] Referring again to Figures 2, 4, and 5, the first axis sleeve 510 and the second axis sleeve 52 All of the 0s are attached to the housing 100. Specifically, the first axis sleeve 510 The second shaft sleeve 520 is housed in the housing chamber 114, and the position limiting chamber 11 It is housed inside 2. The first axis sleeve 510 and the second axis sleeve 520 are both housing It is fixedly connected to the 100. The first axis sleeve 510 and the second axis sleeve 520 are The first axial sleeve 510 and the second axial sleeve are provided at intervals along the axial direction of the wedge 100. The shaft sleeve 520 can restrict the position of the rotating shaft 200. Second shaft sleeve 520 The first axis sleeve 510 is closer to the connecting end 210 of the rotating shaft 200, or the second axis sleeve The rib 520 is located in the housing 100, with the partition ring 120 being larger than the first axis sleeve 510. It is in close proximity to the rotor 400, which is positioned between the first shaft sleeve 510 and the second shaft sleeve 520. The stator 300 is positioned between the first shaft sleeve 510 and the second shaft sleeve 520. In the illustrated embodiment, the first rotor 410, the second rotor 420, and the first stator unit Both 310 and the second stator unit 320 are connected to the first shaft sleeve 510 and the second shaft sleeve Located between the first rotor 410 and the first shaft sleeve 510, the first rotor 410 is provided in close proximity to the first shaft sleeve 510. The second rotor 420 is positioned close to the second shaft sleeve 520. In other words, , first shaft sleeve 510, first rotor 410, first stator unit 310, second stay The rotor unit 320, the second rotor 420, and the second shaft sleeve 520 are aligned with the axis of the rotating shaft 200. They are arranged in order along the axis, and the second shaft sleeve 510 is closest to the connecting end 210 of the rotating shaft 200. To come into contact with.

[0034] The first shaft sleeve 510 has a recessed groove 512, and the recessed groove 512 is a recessed spherical wall 51 It has 4. The rotating shaft 200 is provided so as to rotatably penetrate the second shaft sleeve 520, and rotate The ball head end 220 of the rotating shaft 200 is movably provided within the groove 512, and the rotating shaft 200 The ball head end 220 can contact the spherical wall 514. The groove 512 is the axis of rotation. The ball head end 220 can be supported and its position restricted, and the rotation axis 200 rotates The range of movement away from the impeller 20 along the axis of shaft 200 is limited, and , limiting the range of oscillation of the ball head end 220 of the rotating shaft 200 in the radial direction of the rotating shaft 200. do.

[0035] Referring to Figures 10, 11, and 12, specifically, the recessed groove 512 has a groove opening 512a The rotating shaft 200 is provided passing through the groove 512a, and the groove 512a of the recessed groove 512 A rounded chamfer 515 is provided. That is, the groove wall at the groove opening 512a of the recessed groove 512 is rounded. By chamfering, the rotating shaft 200 is located in the groove opening 512a of the concave groove 512 which has corners. This prevents damage and wear.

[0036] Specifically, the length h of the ball head end 220 in the axial direction of the rotating shaft 200 is the groove The depth s of groove 512 is from the groove opening 512a to the spherical wall 514. It is smaller than the maximum distance (at which point), thereby pushing the ball head end 220 into the groove 512. This further restricts the rotation and reduces the range of oscillation of the rotation axis 200 in the radial direction. However, rotation To avoid the shaft 200 being positioned too far within the groove 512, the groove 512 The depth should not be too great; otherwise, the length of the rotation axis 200 may become too long. (See illustration) In this embodiment, the radius of the spherical wall 514 is greater than the radius of the ball head end 220. In other words, the radius of the sphere on which the spherical wall 514 is located is half the radius of the sphere on which the ball head end 220 is located. It is larger than the diameter. The length L of the spherical wall 514 in the axial direction of the first shaft sleeve 510 is the groove It is smaller than the depth s of 512.

[0037] Specifically, the first shaft sleeve 510 has a fluid passage hole 516 that communicates with the groove 512. The liquid passage hole 512 is formed so that the cleaning liquid flows into the groove 512 through the liquid passage hole 516. The urinary tract can be connected to the irrigation line in catheter 50. The irrigation fluid flows through groove 51. When it flows between the groove wall of 2 and the ball head end 220, it can perform a lubricating function. The friction between the ball head end 220 and the groove wall of the concave groove 512 is reduced, and the ball head end 220 And it reduces wear on the groove walls.

[0038] Specifically, the opening 516a of the liquid passage hole 516 is located at the center of the spherical wall 514, As a result, the cleaning fluid that flows into the groove 512 from the fluid passage hole 516 is directed as far as possible towards the rotating shaft 200. Provides an axial impact force to the ball head end 220. More specifically, through the fluid passage hole 516. The central axis and the central axis of the chamber enclosed by the spherical wall 514 coincide, allowing fluid to pass through. By making hole 516 a straight hole, the energy consumption of the cleaning solution in the liquid passage hole 516 is reduced. .

[0039] Specifically, the diameter of the opening 516a of the liquid passage hole 516 located in the spherical wall 514 is such that it is ball-shaped The diameter of the sphere on which the head end 220 is located is 1 / 9 to 1 / 3 (the diameter of the ball head end 220 is, This is the diameter of the sphere on which the ball head end 220 is located. In the illustrated embodiment, The diameter of the liquid hole 516 is constant, that is, the diameter of the liquid passage hole 516 is constant at the ball head end 22 It is 1 / 9 to 1 / 3 of the diameter of 0. The opening 516a of the liquid passage hole 516 located in the spherical wall 514. If the diameter is too large, the contact surface between the ball head end 220 and the spherical wall 514 becomes small. The spherical wall 514 increases wear on the ball head end 220. The diameter of the opening 516a is small. If too much is used, it will affect the amount of cleaning fluid that flows into the groove 512 from the liquid passage hole 516, and groove 5 The cleaning fluid that flows into 12 applies an impact force to the ball head end 220, while the ball head It flows between the ball head end 220 and the spherical wall 514, performing a lubricating action, and the ball head end 220 In order to reduce the coefficient of friction between the spherical wall 514, the amount of cleaning fluid that flows into the groove 512 It is undesirable for it to be too small.

[0040] Referring to Figures 13, 14, and 15, specifically, the drive mechanism 10 is located in the housing 1 The system further includes a support seat 800 fixedly connected to 00. The support seat 800 includes a mounting chamber 810 and an inlet hole 820 communicating with the mounting chamber 810 are formed, and the first shaft sleeve 5 10 is attached to the mounting chamber 810. The fluid passage hole 516 communicates with the fluid inlet hole 820. The end of the inlet hole 820 that is separated from the mounting chamber 810 is such that the cleaning fluid enters the inlet hole 820 and The liquid flows through the passage hole 516 into the gap between the groove wall of the recessed groove 512 and the ball head end 220. Then, the lavage line of the catheter 50 flows into the chamber of the housing 100. It communicates with [this].

[0041] Specifically, the mounting chamber 810 has a chamber bottom 812, and the opening of the liquid inlet hole 820 is Located at the bottom 812 of the mounting chamber 810, and inside the mounting chamber 810, there is a support step A differential portion 814 is provided, and the support stepped portion 814 abuts against the first shaft sleeve 510, and the first shaft The sleeve 510 and the chamber bottom 812 are separated by a certain distance to ensure smooth flow of the cleaning fluid. To ensure better stability. Specifically, the support step portion 814 is the first of the first shaft sleeve 510. It contacts the surface away from the two-axis sleeve 520.

[0042] Specifically, a branch channel 830 is further formed in the support seat 800, and the branch channel 830 is The cleaning fluid, which flows through the inlet hole 820, is in fluid communication with the inlet hole 820 and further through the branch channel 830. It can flow into the chamber of housing 100 via this. Specifically, branched channel 300 is located between the first shaft sleeve 510 and the chamber bottom 812 of the mounting chamber 810. It communicates with the gap and the other end communicates with the containment chamber 114. In the illustrated embodiment, branched flow The passage 830 is formed by a recess in a portion of the chamber wall of the mounting chamber 810. In other words, Under normal conditions, the cleaning fluid flows from the inlet hole 820 into the mounting chamber 810 and then into two separate tubes. It branches off, one of which flows into the groove 512 of the first shaft sleeve 510 via the fluid passage hole 516, and the other The book flows out through the branch channel 830. By providing the branch channel 830, the ball head The flow of the cleaning fluid can be guaranteed even when the end 220 blocks the fluid passage hole 516. In this embodiment, there are two branch channels 830, and the two branch channels 830 are opposite each other. It is provided as follows. The number of branch channels 830 can be adjusted as needed in the design. For example, in some embodiments, the number of branched channels 830 is one or two or more. That's good too.

[0043] Referring to Figures 2, 3, 4 and 16, the second shaft sleeve 520 is connected to partition ring 1 It contacts 20, that is, the partition ring 120 is between the second shaft sleeve 520 and the rotor 400. It is located in between. In the illustrated embodiment, the partition ring 120 is located between the second shaft sleeve 520 and It is located between the second rotor 420 and the second shaft sleeve 520 by the partition ring 120. This makes it easier to position the second axis sleeve 520 and facilitates assembly of the second axis sleeve 520. The shaft sleeve 520 has a shaft hole 522 formed in it, and the rotating shaft 200 is rotatable within the shaft hole 522. It is provided penetrating through. In the illustrated embodiment, the central axis of the shaft hole 522 is the first shaft three It coincides with the central axis of the fluid passage hole 516 of the 510. Hole wall of the shaft hole 522 of the second shaft sleeve 520. There is a gap between the rotating shaft 200 and the fluid flowing through it. The fluid flows into the containment chamber 114. The cleaning fluid flows through the gap between the rotating shaft 200 and the hole wall of the shaft hole 522 and into the housing 100. It can be leaked.

[0044] The stopper member 600 is connected to the rotating shaft 200 and the rotor 400 (specifically, the second rotor 42 The stopper member 600 is fixedly connected to at least one of 0), in other words the stopper member 600 is It may be directly fixed only to the rotor 400, or it may be directly fixed only to the rotating shaft 200. The rotor 400 and the rotating shaft 200 may be directly fixed at the same time. Since it is fixedly connected to the rotating shaft 200, the stopper member 600, the rotating shaft 200 and the rotor The three components of 400 rotate and move in sync. The stopper member 600 is connected to the rotor 400 and the second The stopper member 600 is located between the shaft sleeve 520 and the second shaft sleeve 520, and abuts against the second shaft sleeve 520. Then, the rotating shaft 200 moves in a direction that approaches the impeller 20 along the axis of the rotating shaft 200. It is possible to restrict this.

[0045] The stopper member 600, the rotating shaft 200, and the rotor 400 rotate and move in synchronous motion. Therefore, the stopper member 600 comes into contact with the second shaft sleeve 520, and the rotating shaft 200 rotates It is possible to restrict movement in the direction approaching the impeller 20 along the axis of 200. The ball head end 220 of the rotating shaft 200 is provided in the groove 512 of the first shaft sleeve 510. Then, the rotation axis 200 comes into contact with the spherical wall 514 of the groove 512, along the axis of the rotation axis 200. The range of movement away from the impeller 20 can be limited, thereby controlling the rotation axis. This achieves positional constraints on the axis of rotation 200 relative to 200. Also, rotation 200 is second It is provided through the shaft sleeve 520, and the ball head end 220 of the rotating shaft 200 is the first shaft Since it is provided in the groove 512 of the sleeve 510, the groove wall of the groove 512 of the first shaft sleeve 510 This controls the range of oscillation of the ball head end 220 of the rotating shaft 200 in the radial direction of the rotating shaft 200. This can also be limited, achieving overall limitation of the oscillation range of the rotation axis 200 in the radial direction. In other words, the above design not only achieves axial position constraints with respect to the rotation axis 200, but also Furthermore, radial position constraints are achieved with respect to the rotation axis 200.

[0046] In the illustrated embodiment, the stopper member 600 is fixedly connected to the second rotor 420. Specifically, the stopper member 600 is connected to the second flywheel 422 of the second rotor 420. It is fixedly connected. In some embodiments, the stopper member 600 is connected to the second rotor 4 The 20 second flywheels 422 are bonded to the stopper member in some embodiments. 600 is integrally molded with the second flywheel 422 of the second rotor 420. Blood pump The overall volume of part 1 is small, and the volume of the stopper member 600 is even smaller, making machining precision difficult. Furthermore, because assembly is difficult, the stopper member 600 and the second flywheel 422 are integrated. Molding makes it easy to attach and eliminates the need for adhesive bonding.

[0047] Specifically, when the stopper member 600 comes into contact with the second shaft sleeve 520, the stopper part At least a portion of the material 600 is located on the inner ring of the partition ring 120, and the stopper member 600 There is a gap through which fluid can flow between the inner wall of the partition ring 120 and the partition ring There is a certain distance between the 120 and the rotor 400. The stopper member 600 and the partition The ring 120 has a gap through which fluid flows, allowing the cleaning fluid to stop The second shaft sleeve 520 is located through the gap between member 600 and the inner wall of partition ring 120. It can flow into the gap between the holes of the shaft hole 522, that is, the shaft hole 5 of the second shaft sleeve 520 Fluid communication is achieved between 22 and the containment chamber 114. In addition, the stopper member 600 is When contacting the two-axis sleeve 520, the partition ring 120 and the rotor 400 are kept at a certain distance. By separating them by that amount, when the stopper member 600 comes into contact with the second shaft sleeve 520 This prevents wear caused by contact friction between the rotor 400 and the partition ring 120. Specifically, the stopper member 600 is roughly annular, and the central axis of the stopper member 600 is, It coincides with the axis of rotation shaft 200. The outer diameter of the stopper member 600 is the inner diameter of the partition ring 120. Smaller than, and as a result, between the stopper member 600 and the inner wall of the partition ring 120 There is a gap through which fluid flows. In other embodiments, the stopper member 600 has multiple fan-shaped ri The rings may be arranged in a sequence, and the multiple sector-shaped rings are equally spaced around the rotation axis 200. Multiple sector-shaped rings are arranged in a circle or discretely in the circumferential direction. That's good too.

[0048] Specifically, the thickness of the stopper member 600 along the axis of the rotation shaft 200 is the partition ring The thickness along the axis of the rotation axis 200 is greater than that of the stopper member 60 When 0 contacts the second shaft sleeve 520, between the partition ring 120 and the rotor 400 There is a certain distance between them. In addition, in some embodiments, the rotation axis of the stopper member 600 The thickness along the axis of 200 is less than the thickness along the axis of rotation of the partition ring 120. It may also be below, in this case rotor 400 (specifically, the second rotor 420) and stop The part 600 may be spaced a certain distance apart in the direction along the axis of the rotation shaft 200. The distance is such that when the stopper member 600 contacts the second shaft sleeve 520, the partition ring 1 The 20 and rotor 400 can be separated by a certain distance.

[0049] Specifically, a portion of the surface of the second shaft sleeve 520 facing the stopper member 600 is recessed and guided A flow groove 524 is formed, and the flow guide groove 524 communicates with the shaft hole 522 of the second shaft sleeve 520, When the topper member 600 contacts the second shaft sleeve 520, a portion of the flow guide groove 524 is struck Because it is not covered by the stopper member 600, the stopper member 600 comes into contact with the second shaft sleeve 520. When contact is made, the stopper member 600 and the shaft hole 522 of the second shaft sleeve 520 and the rotating shaft 200 Even if there is a problem of obstruction of the flow of cleaning fluid due to blocking the gap between them, the stopper member 6 The flow guide groove 524, which is not covered by 00, is where the stopper member 600 comes into contact with the second shaft sleeve 520. It enables fluid communication upon contact, ensuring smooth flow of the cleaning solution. Furthermore, a portion of the surface of the second shaft sleeve 520 facing the stopper member 600 is recessed, forming a flow guide groove 524 By forming this, the cleaning fluid is able to flow between the stopper member 600 and the second shaft sleeve 520. It can flow in smoothly, and on the contact surface between the stopper member 600 and the second shaft sleeve 520 It provides a lubricating effect, reducing friction between the stopper member 600 and the second shaft sleeve 520. This reduces friction between the stopper member 600 and the second shaft sleeve 520, thereby reducing wear problems caused by friction. ru.

[0050] The stopper member 600 has a stopper surface 610, and the stopper surface 610 is on the rotating shaft 200 The second shaft sleeve 520 is perpendicular to the axis and has a locking surface 526, and the locking surface 526 is The locking surface 526 is perpendicular to the central axis of the shaft hole 522 of the second shaft sleeve 520, and acts as a stopper. Opposite to surface 610, the locking surface 526 abuts against the stopper surface 610, causing the rotating shaft 200 to rotate. It is possible to restrict movement in the direction approaching the impeller 20 along the axis of shaft 200. The stopper surface 610 is perpendicular to the axis of the rotation shaft 200, and the locking surface 526 is the second axis sliding. The shaft hole 522 of the shaft 520 is perpendicular to the central axis, and the rotation axis 200 is perpendicular to the second shaft sleeve 520. Since it is provided so as to rotatably pass through the shaft hole 522, the rotating shaft 200 operates normally, When the stopper member 600 contacts the second shaft sleeve 520, the stopper surface 610 and the locking surface 526 can make surface contact with the stopper member 600 and the second shaft sleeve 520, and friction between the stopper member 600 and the second shaft sleeve 520. This can reduce wear caused by the partition ring 120. Specifically, the locking surface 526 is the partition ring 120. It comes into contact with the surface. The flow guide groove 524 is formed by recessing a part of the locking surface 526.

[0051] Specifically, the roughness of at least one of the stopper surface 610 and the locking surface 526 is 0 It is 0.1 micrometer or less. In some embodiments, the stopper surface 610 and related The roughness of the toe facet 526 is 0.1 micrometers or less in all cases. The roughness of one of the stopper surface 610 and the locking surface 526 is 0.1 micrometers. The following applies: Reduce the roughness of at least one of the stopper surface 610 and the locking surface 526. By doing so, the frictional force between the stopper surface 610 and the locking surface 526 is effectively reduced, To reduce the problem of wear caused by friction between the two-axis sleeve 520 and the stopper member 600. It is possible.

[0052] In some embodiments, at least one of the stopper surface 610 and the locking surface 526 The other side is a ceramic surface. Ceramics have high processing precision, high biocompatibility, and mechanical properties. It has high strength and good wear resistance and corrosion resistance. At this time, the stopper member 600 and the second The material of the shaft sleeve 520 may be ceramic, or it may be ceramic coated. By providing this, at least one of the stopper surface 610 and the locking surface 526 is ceramic To achieve a mixed surface. In some embodiments, the material of the stopper surface 610 is It is made of diamond, and as a result, the stopper surface 610 has high hardness and a smooth surface. Having a surface and being resistant to wear, and in this case, by providing a diamond coating This ensures that the material of the stopper surface 610 is a ceramic surface.

[0053] The structure of the drive mechanism 10 is not limited to the above structure. In some embodiments, The number of rotors 400 and stators 300 is 1 each, and in this case, rotor 40 0 is provided in close proximity to the second shaft sleeve 520, and the stator unit is located in close proximity to the first shaft sleeve It is located in close proximity to 510. In some embodiments, the rotor 400 is still It has a first rotor 410 and a second rotor 420, but the stator unit of the stator 300 is , and in this case the stator unit consists of a first rotor 410 and a second rotor 420 Located in between, the stator unit drives and rotates the first and second rotors simultaneously. It is possible.

[0054] Referring to Figures 17 and 18, the blood pump 1 includes a drive mechanism 10 and an impeller 20. The drive mechanism 10 is powered by a drive mechanism 10 connected to the impeller 20, and the drive mechanism 10 controls the rotation of the impeller 20. It can drive rotation. Specifically, the blood pump 1 is fixed at the far end of the drive mechanism 10. The impeller 20 further includes a cannula assembly 30 connected to the cannula. It is rotatably housed in the humb 30. The cannula assembly 30 has a blood inlet 31 and It has a blood outlet 32. The blood inlet 31 is provided at the distal end of the cannula assembly 30. The blood outlet 32 ​​is located near the end of the cannula assembly 30. There are multiple blood outlets 32, and the multiple blood outlets 32 are located along the circumferential direction of the cannula assembly 30. It is distributed with intervals between it. When the impeller 20 rotates, the blood flows from the blood inlet 31 into the crab After flowing into the blood assembly 30, it flows out through the blood outlet 32. In one embodiment... The cannula assembly 30 is inserted extending into the heart valve, for example, the aortic valve. The blood inlet 31 is located inside the heart, while the blood outlet 32 ​​and drive mechanism 10 are located outside the heart. It is located in blood vessels such as arteries.

[0055] Referring to Figure 19, the cannula assembly 30 consists of an insertion tube 33, a connecting tube 34, and an outlet tube. Including the pipe 35, the insertion pipe 33, connecting pipe 34, and outlet pipe 35 are all hollow tubular structures. The insertion tube 33 is fitted into the connecting tube 34, thereby inserting the inner wall of one end of the connecting tube 34. It is connected to the outer wall of pipe 33. Specifically, the insertion pipe 33 has a near end and a far end, and the insertion pipe 3 The near end of 3 is connected to the connecting tube 34, and the blood inlet 31 is located at the far end of the insertion tube 33.

[0056] Referring to Figure 20, the outlet pipe 35 has a connection part 351 that is close to the connecting pipe 34, and the connecting pipe 3 It includes an outlet section 352 that separates from 4. The outlet pipe 35 is fitted into the connecting pipe 34. The outer wall of the connecting portion 351 is connected to the inner wall of one end of the connecting pipe 34 that separates from the insertion pipe 33. One end of the mouth section 352, detached from the connecting pipe 34, is fixedly connected to the drive mechanism 10, and the impeller The impeller 20 is rotatably positioned within the outlet pipe 35, or a portion of the impeller 20 is located within the outlet pipe 35. It is located inside, with a portion of it located inside the insertion tube 33. The blood outlet 32 ​​is located at the outlet portion 352. The multiple blood outlets 32 are uniformly arranged in the outlet portion 352 in the circumferential direction of the outlet tube 35. The impeller 20 is driven to rotate by the drive mechanism 10, thereby discharging blood The blood flows in from the blood inlet 31, passes through the insertion tube 33, and enters the outlet tube 35, where there are multiple blood outlets 3 It leaks out via 2.

[0057] In conventional methods of connecting the insertion tube 33 and the outlet tube 35, the insertion tube 33 is directly connected to the outlet tube 35. It is fitted into place, but the insertion tube 33 is a flexible tube and the outlet tube 35 is metal. Since it is a pipe, there is no matching assembly position, and the diameters of the two pipes are different, the insertion pipe 33 In order to be fitted into the outer wall of the outlet pipe 35, the insertion pipe 33 before connection is process-molded The port diameter of the insertion tube 33 needs to be enlarged to match the outlet tube 35, which makes the process complicated. The construction is sloppy, the connections are unstable, and the strength of the molded parts is reduced.

[0058] In this embodiment, the insertion tube 33 and the outlet tube 35 in the cannula assembly 30 are connected. The pipes are connected in a transitional manner via pipe 34, with the inner wall of one end of the connecting pipe 34 connected to the outer wall of the insertion pipe 33. The outer wall of the connection portion 351 of the outlet pipe 35 is connected to the inner wall of the other end of the connecting pipe 34, and This allows the insertion pipe 33 and the outlet pipe 35 to be fixedly connected to form a continuous pipeline. A molding process is performed on the insertion tube 33 in order to directly fit the insertion tube 33 and the outlet tube 35 together. It eliminates necessary steps, provides a strong connection, and is easy to assemble.

[0059] Referring to Figures 19 to 22, a position-restricting protrusion ring 341 is provided on the inner wall of the connecting pipe 34. Specifically, the position-restricting protrusion ring 341 protrudes in an annular shape from the inner wall of the connecting pipe 34. The position-restricting protrusion ring 341 is provided and is coaxial with the connecting pipe 34. 1 is provided with a first end face 3411 and a second end face 3412 along the axial direction of the connecting pipe 34. The first end face 3411 abuts against the end of the insertion tube 33, and the second end face 3412 is the connecting part 3 It abuts against the end of 51. The outer diameter of the connecting portion 351 is smaller than the outer diameter of the outlet portion 352. Connection One end of the pipe 34 that is separated from the insertion pipe 33 is close to the connection part 351 of the outlet part 352. The outer wall of the connecting pipe 34 abuts against the end of the end and is flush with the outer wall of the outlet section 352. Specifically, The connecting portion 351 and the outlet portion 352 have the same inner diameter, and the position limiting protrusion ring 341 is It has a constant thickness, which allows the first end face 3411 adjacent to the insertion tube 33 and the outlet tube 35 to The insertion pipe 33 and the outlet pipe 35 each form a connecting pipe 34. When fitted inside, the position-restricting protrusion ring 341 simultaneously restricts the axial direction of the outlet pipe 35 and the insertion pipe 33. Positional restrictions can be imposed in a given direction, and the fitting depth of the outlet pipe 35 and the insertion pipe 33 can be controlled. It serves to position the connecting pipe 34, facilitating subsequent fixing and connection operations. The end can abut against the end of the exit portion 352 and act together with the position limiting protrusion ring 341. This creates positional constraints in two axial directions, resulting in a more stable fit. At this time, the connection The outer wall of pipe 34 and the outer wall of outlet section 352 are flush, and the outer wall of connecting pipe 34 and outlet pipe 35 are flush. The outer wall of the opening 352 is located on the same cylindrical surface, and the entire connection point between the connecting pipe 34 and the outlet pipe 35 The overall outer diameter is effectively controlled, the connection point is smoothly transitioned, and there are no wavy stepped sections. Therefore, it is important to avoid a smooth entry into the blood vessels of the human body, and consequently, to prevent damage to the blood vessels.

[0060] Furthermore, referring to Figures 18 to 20 and Figure 24, the impeller 20 includes the blades 21. The end of the blade 21 that is separated from the drive mechanism 10 is connected to the drive mechanism 10 of the connecting part 351. It does not exceed the end of one end that is separated from it. Specifically, the impeller 20 further includes a hub 22, The blades 21 are spirally wrapped around the hub 22. Part of the impeller 20 is connected to the outlet pipe 3 Located at 5, the drive mechanism 10 drives the rotation of the impeller 20. This causes vibration and yawing, so a certain distance is provided between the inner wall of the outlet pipe 35 and the outlet pipe 35. It is necessary that even if maximum yawing occurs in the impeller 20, the blades 21 will be in the outlet pipe 35 It ensures that it does not collide with the inner wall of the conduit at the position where the position-restricting convex ring 341 is located. The gap is narrow, and the blade 21 has a constant height in the axial direction of the outlet pipe 35, and the blade 21 is the outlet pipe 35 occupies a constant width in the radial direction, and the highest point of the blade 21 in the axial direction is from the outlet pipe 35. Because it is not extended, the blade 21 does not come into contact with the position-restricting convex ring 341. Furthermore, the position-limiting protrusion ring 341 is not limited to the complete annular structure in the above embodiment, It may also be a series of boss structures that are not connected to each other and are arranged at equal intervals, maintaining positional constraints. Under the conditions that demonstrate this, material can be saved. The position limiting convex ring 341 is connected independently. It may be a structure connected to the connecting pipe 34, or it may be a structure integrally molded with the connecting pipe 34. Often, integral molding results in greater strength.

[0061] Referring to Figure 20, the inner diameter of the insertion tube 33 is smaller than the inner diameter of the outlet tube 35, and the first end face The radial width of 3411 is greater than the radial width of the second end face 3412, As a result, the inner wall of the insertion tube 33 becomes flush with the edge of the first end face 3411, and the inner wall of the outlet tube 35 This becomes flush with the edge of the second end face 3412. The position-restricting convex ring 341 is the transition surface 3413 Furthermore, the transition surface 3413 includes the edge of the first end face 3411 and the edge of the second end face 3412. The parts are connected. Specifically, the dimensions and specifications of the insertion tube 33 and the outlet tube 35 are different. The inner diameters of the members are different, that is, the first end face 3411 is radially connected to the second end face 3412. Because they protrude more from the inner wall of 34, when they come into contact with the position-restricting protrusion ring 341, The edge of the first end face 3411 is made flush with the inner wall of the insertion tube 33, and the edge of the second end face 3412 is made flush with the outlet tube. It is necessary to make it flush with the inner wall of 35, and in this way the outlet pipe 35 and insertion pipe 33 are positionally restricted. After contact with the convex ring 341, the blood flow passage formed by the inner walls of the three is made more continuous, and the three This prevents the formation of dead space at the connection transition point, and blood flows into the dead space, preventing blood clots. This prevents the formation of blood clots by avoiding spurting.

[0062] More specifically, since the widths of the first end face 3411 and the second end face 3412 are different, the first end face The distance between 3411 and the second end face 3412 forms a large vertical step, and the direction of blood flow is Flow flows from the insertion tube 33 to the outlet tube 35, and a dead space is formed between the two, as The transition surface 3413 connects the edge of the first end face 3411 and the edge of the second end face 3412. This forms a gentle transition surface 3413, allowing blood to flow directly along the transition surface 3413. This can create dead space, leading to blood blockage and increasing the risk of blood clot formation. do not have.

[0063] The transition surface 3413 may be a convex or concave surface, and the curved surface has a flow-guiding effect on blood. That's better.

[0064] Referring to Figure 20, the transition surface 3413 has a columnar surface 3413a that is coaxial with the connecting pipe 34, and It has an inclined surface 3413b that forms an angle with the axis of the connecting pipe 34. One end of the columnar surface 3413a is the inclined surface One end of 3413b is connected to the other end of the columnar surface 3413a, and the other end that is separated from the inclined surface 3413b of the columnar surface 3413a is the It is connected to the edge of one end face 3411. The columnar surface 3413a is flush with the inner wall of the insertion tube 33. Furthermore, one end of the inclined surface 3413b that separates from the columnar surface 3413a is in contact with the edge of the second end surface 3412. It will continue.

[0065] The transition surface 3413 consists of two parts, with one end of the columnar surface 3413a being the first end surface 341 Connected to the edge of 1, and after the insertion tube 33 comes into contact with the first end face 3411, the inside of the insertion tube 33 It becomes flush with the wall. Flushness means that the connection surface between the columnar surface 3413a and the insertion tube 33 transitions smoothly. This refers to the absence of undulating steps. When processing and forming the position-limiting convex ring 341, the columnar surface 3 Because it is transitioned by 413a, the slope 3413b is directly connected to the edge of the first end face 3411. This avoids the formation of angular structures at the connection points, resulting in lower processing difficulty. (Slope 3413) b connects the edge of the columnar surface 3413a and the edge of the second end surface 3412, and at this time, blood flow is, column After passing through surface 3413a, it flows along slope 3413b and into outlet pipe 35. Therefore, the insertion tube 33 and the outlet tube 35, which have different inner diameters, are connected via the position-limiting protrusion ring 341. As a result, the blood flow passage forms a continuous passage, and the blood flow moves from the inner wall of the insertion tube 33 to the position When the fluid flows into the inner wall of the outlet pipe 35 after passing through the transition surface 3413 of the restricting convex ring 341, It allows blood to flow smoothly, preventing blockages and the formation of blood clots.

[0066] Furthermore, the outlet pipe 35 is a metal pipe. The insertion pipe 33 is a flexible pipe. It is a tube. In this embodiment, the outlet pipe 35 is specifically a plastic pipe and is connected The pipe 34 may be a metal pipe. Both ends of the connecting pipe 34 are made of two different materials. Because joining is necessary, during the joining process, the inner wall of one end of the connecting pipe 34 is the same as the insertion pipe 33. It is fixed to the outer wall by being adhered to it, and one end of the connecting pipe 34 that is separated from the insertion pipe 33 is outside the connection part 351. The metal connecting tube 34 is welded and fixed to the wall, conforms to process requirements, and extends outwards from the insertion tube 33. The strength is also guaranteed by fitting it into the joint with the main tube 35.

[0067] Referring to Figure 20, the connecting pipe 34 consists of a first pipe section 342 and a second pipe section 34 that are connected to each other. 3 includes the inner wall of the first pipe section 342 is connected to the outer wall of the insertion pipe 33, and the second pipe section 343 The inner wall is connected to the outer wall of the connection part 351. The position limiting protrusion ring 341 is connected to the second pipe part 343 It is provided on the inner wall of the first pipe section 342 and the second pipe section 343 have the same outer diameter, and the first pipe section The inner diameter of 342 is larger than the inner diameter of the second pipe section 343. The thickness of the pipe wall of the connecting pipe 34 is two Divided into two parts, the thinner first pipe section 342 is connected to the insertion pipe 33, and the thicker second pipe section 3 43 is connected to the outlet pipe 35. The insertion pipe 33 is a flexible tube that is pliable. Therefore, due to these characteristics, it is easier to enter curved human blood vessels, and The connecting tube 34 is a metal tube, made of a hard material, and in its axial direction, the connecting tube 34 is connected to the insertion tube 33 It is fitted into the outer wall, and because the fitted portion becomes excessively rigid, the thickness of the first pipe section 342 is reduced. This improves the elasticity of the first tube section 342, allowing it to enter curved blood vessels in the human body without being too rigid. It can be adaptively transformed to suit the situation.

[0068] Furthermore, there is a pipe gap 3421 between the inner wall of the first pipe section 342 and the outer wall of the insertion pipe 33. By leaving a constant gap 3421 in the radial direction between the first pipe section 342 and the insertion pipe 33 An adhesive is applied, and at the same time, after applying the specified adhesive, the outer wall of the first pipe section 342 expands outwards. Avoid stretching the adhesive and prevent the outer diameter of the adhesive application area from expanding.

[0069] Because there is a gap 3421 in the pipe section, after the insertion pipe 33 and the connecting pipe 34 are fitted together, the axes of the two It cannot be guaranteed that they are the same, and in the specific operating process, the axes of both are the same. In order to achieve this, it is necessary to use an auxiliary positioning tool, and the auxiliary positioning The tool may be a single cylindrical positioning column, and the outer diameter of the positioning column is the insertion tube 3 3 or the same as the inner diameter of the columnar surface 3413a of the position-limiting convex ring 341. Specifically, First, insert the positioning column and use the columnar surface 341 of the position limiting protrusion ring 341 on the outer wall of the positioning column. 3a is brought into close contact with the outer wall of the positioning column, and then the insertion tube 33 is inserted, and the inner wall of the insertion tube 33 is positioned against the outer wall of the column. After ensuring a tight fit, apply adhesive to the gap 3421 between the insertion tube 33 and the connecting tube 34. That's all you need to do.

[0070] Furthermore, referring to Figure 23, the first pipe section 342 has multiple weight-reducing grooves 3422 formed therein. The weight-reducing groove 3422 is a through groove that penetrates the inner and outer walls of the first pipe section 342, and the first pipe section The area of ​​342 can be effectively reduced, and the elasticity of the first pipe section 342 can be improved. At the same time, during the process of applying the adhesive, the weight-reducing groove 3422 on the side of the first pipe section 342 By applying the adhesive in this way, the adhesive can be applied in multiple directions, resulting in a more even application of the adhesive. This allows for a uniform bond, resulting in a better adhesive effect. Furthermore, when the adhesive is heat-dried, the bonding process is improved. When the agent expands and the side of the first tube section 342 is a sealed space, the outer diameter expands as the adhesive expands. By making it larger, the provided weight-reducing groove 3422 can also accommodate some of the adhesive. The adhesive has a space that allows it to expand, and does not cause an increase in the outer diameter. Weight-reducing groove 342 2 may be an "I" shaped straight groove, or a meandering groove such as an "S" shaped or "J" shaped groove. It may also be a curved groove. In the case of arrangement, the weight-reducing groove 3422 is along the radial direction of the connecting pipe 34. They may be arranged in a certain way, or they may be arranged along the axial direction of the connecting pipe 34.

[0071] Specifically, referring to Figures 17 and 24, the blood pump 1 is located near the drive mechanism 10. Further includes a connected catheter 40. The catheter 40 accommodates various supply lines. For example, the supply line includes wires for electrically connecting to the drive mechanism 10 and the blood pump. The drive mechanism 10 includes a cleaning line for passing a cleaning fluid through it. Preferably, the cleaning fluid is raw These include saline solution, heparin-containing saline solution, or glucose.

[0072] Referring to Figures 24 to 26, the drive mechanism 10 consists of a housing 100 and a rotating shaft 200. It includes a first shaft sleeve 300, a second shaft sleeve 400, and a stopper member 500. The distal end of the wedge 100 is fixedly connected to the cannula assembly 30 and housing 1 The near end of 00 is fixedly connected to the catheter 40. The housing 100 is generally at both ends It is an open cylindrical housing. The housing 100 has a chamber 101 and a cleaning light. The cleaning fluid inside flows into the chamber 101 from the near end of the housing 100, and the housing 10 It flows out of housing 100 via the far end of 0.

[0073] In some embodiments, the housing 100 comprises a first shell 110 and a second shell 1 Including 20. The proximal end of the first shell 110 is fixedly connected to the catheter 40, and the first shell The far end of the 110 is fixedly connected to the near end of the second shell 120, and the far end of the second shell 120 The ends are fixedly connected to the cannula assembly 30. The first shell 110 and the second shell The 120 surrounds the chamber 101 of the housing 100. The housing 100 is the first shelf The rotation axis 2 is formed by joining the 110 and the second shell 120. 00, first shaft sleeve 300, second shaft sleeve 400, stopper member 500, etc. This facilitates attachment of the chamber 101 of the ring 100.

[0074] The rotating shaft 200 is rotatably mounted in the housing 100. The rotating shaft 200 is an Imperial It is fixedly connected to the ra 20 and drives the rotation of the impeller 20. The rotating shaft 200 is the shaft portion 21 The shaft portion 210 includes the sliding portion 220 and is rotatably mounted in the housing 100. One end of the shaft portion 210 is fixedly connected to the sliding portion 220, and the other end of the shaft portion 210 is connected to the Imperial. It is connected to the ra 20. The shaft portion 210 is elongated. The far end of the shaft portion 210 is connected to the housing 1 It is located outside of 00 and is fixedly connected to the impeller 20. Note that the impeller 20 has a shaft It can rotate according to 210. In the illustrated embodiment, the shaft portion 210 is roughly how Extending along the axial direction of the sing 100, or in the direction of extension of the axis of the shaft portion 210, housing It roughly coincides with the axis direction of G100.

[0075] The sliding portion 220 has a spherical cap surface 221. The axis of the shaft portion 210 is where the spherical cap surface 221 is located. It passes through the center of the sphere. In the illustrated embodiment, the diameter of the sphere on which the spherical crown surface 221 is located is the axis It is larger than the diameter of part 210. Specifically, the spherical crown surface 221 in the axial direction of the shaft part 210 The height of the spherical surface 221 is greater than or equal to the radius of the sphere on which the spherical surface 221 is located; in other words, the height of the spherical surface 221 The surface area of ​​is at least half the surface area of ​​the sphere on which it is located.

[0076] Referring to Figure 27, in the illustrated embodiment, the sliding portion 220 has a cylindrical surface 222 and a position It further has a limiting surface 223, and the cylindrical surface 222 has one end connected to the spherical crown surface 221 and the other end is It is connected to the position restriction surface 223, and the axis of the cylindrical surface 222 coincides with the axis of the shaft portion 210, position control The limiting surface 223 is perpendicular to the axis of the shaft portion 210. The position limiting surface 223 is approximately circular. The central axis of the prismatic surface 222 passes through the center of the sphere on which the spherical crown surface 221 is located, and also passes through the positional restriction surface 2 It passes through the center of 23. In the illustrated embodiment, the diameter of the cylindrical surface 222 is such that the spherical crown surface 221 is located It is equal to the diameter of the sphere.

[0077] Note that the sliding part 220 is not limited to the above structure. In some embodiments, the sliding part The whole of 220 may have a spherical structure. At this time, the spherical crown surface 221 is the surface of the portion of the sliding part 220 that is away from the shaft portion 210. At this time, the sliding part 220 does not have the position limiting surface 223 and the cylindrical surface 222. Alternatively, the sliding part 220 does not have the cylindrical surface 222, and the position limiting surface 223 is directly connected to the spherical crown surface 221. In some embodiments, the shaft portion 210 and the sliding part 220 have an integrally formed structure. In some embodiments, the shaft portion 210 and the sliding part 220 may be integrally and fixedly connected by assembly, welding, adhesion, etc. In some embodiments, the sliding part 220 has a sliding body and a diamond coating provided on the surface of the sliding body, which smooths the surface of the sliding part 220 and has high wear resistance. At this time, the material of the sliding body may be a material having a certain rigidity, such as metal, ceramic, etc. The material of the sliding body may be the same as the material of the shaft portion 210.

[0078] Referring to FIGS. 26 and 28, in the illustrated embodiment, the first shaft sleeve 300 and the second shaft sleeve 400 are both located within the chamber 101 of the housing 100 and are distributed at intervals along the axial direction of the housing 100. The first shaft sleeve 300 is located at the proximal end of the housing 100, and the second shaft sleeve 400 is located at the distal end of the housing 100. A concave groove 310 is formed in the first shaft sleeve 300. The sliding part 220 of the rotating shaft 200 is movably provided within the concave groove 310, whereby the first shaft sleeve 300 restricts the rotating shaft 200 from moving in the direction approaching the first shaft sleeve 300. The shaft portion 210 of the rotating shaft 200 is rotatably penetrated through the second shaft sleeve 400, and the second shaft sleeve 400 restricts the movement range of the shaft portion 210 in the radial direction. The second shaft sleeve 40 0 has a shaft hole 410, and the shaft portion 210 of the rotary shaft 200 penetrates through the shaft hole 410 rotatably and is provided. The hole diameter of the shaft hole 410 is slightly larger than the diameter of the portion of the shaft portion 210 of the rotary shaft 200 located in the shaft hole 410, whereby rotation of the shaft portion 210 and passage of the cleaning liquid are allowed to occur. The shaft hole 410 has a certain length along the central axis of the shaft hole 410 (in other words , the shaft hole 410 has a certain length in the axial direction of the housing 100), whereby the rocking range of the shaft portion 210 in the radial direction is restricted, and at the same time, the rocking range of the sliding portion 220 in the radial direction is restricted as well. By adjusting the hole diameter of the shaft hole 410 and the length of the shaft hole 410 along its central axis , the rocking range of the sliding portion 220 in the radial direction can be adjusted.

[0079] When the blood pump 1 operates, a certain width of yawing occurs in the rotary shaft 200. Referring to FIG. 30 , especially at one end of the rotary shaft 200 away from the impeller 20 or at one end of the rotary shaft 200 fitted into the first shaft sleeve 300, the rocking amplitude is large. Therefore, the conventional rotary shaft 200 has a risk of being locked by the first shaft sleeve 300. However, in this embodiment, referring to FIGS. 29 and 31, the spherical crown surface 221 slidably abuts against the groove wall of the concave groove 310, that is , the sliding portion 220 rocks within the concave groove 310 via the spherical crown surface 221, and the depth h of the concave groove 310 is less than or equal to the height of the spherical crown surface 221 in the axial direction of the shaft portion 210. Thereby, the problem that portions of the rotary shaft 200 other than the spherical crown surface 221 contact the groove opening of the concave groove 310 and the rotary shaft 200 is locked is effectively prevented, and the safety and reliability of the drive mechanism 10 and the blood pump 1 are improved . ​Yes, it is possible. The depth h of the groove 310 is greater than the height of the spherical crown surface 221 in the axial direction of the shaft portion 210. If the size is large, a portion of the shaft portion 210 is housed in the groove 310, and the rotating shaft 200 swings radially. If this happens, the rotating shaft 200 will get locked in the groove 310 and will not be able to rotate, which poses a risk of the pump stopping. be.

[0080] Specifically, the groove 310 is a ball head groove. The groove 310 has a spherical wall 312. The spherical crown surface 221 of the sliding portion 220 slidably contacts the spherical wall 312. The groove 310 The radius R of the sphere (or the sphere on which the spherical wall 312 is located) is such that the spherical crown surface 221 is located The radius is greater than the radius r of the sphere, and thereafter the sliding part 220 can slide within the groove 310, It has a constant radial oscillation space. The radius R of the sphere on which the spherical wall 312 is located and the spherical crown surface 221 If we define D as the difference between the radius r of the sphere on which the point is located, then 0.04mm ≤ D ≤ 0.06mm This is the process of fitting the sliding part 210 into the groove 310 by limiting the range of D. While reducing the difficulty, the maximum oscillation angle of the rotation axis 200 can be limited, and the drive mechanism 1 Ensure the stability of operation of 0.

[0081] Specifically, along the axis of the first shaft sleeve 300, adjacent to the second shaft sleeve 400 In that direction, the diameter of the groove 310 gradually increases, or in other words, the groove of the groove 310 The entire wall is almost spherical, and as a result, the spherical crown surface 221 of the sliding part 220 has a recessed groove 3 It can slide more smoothly within 10. The center of the sphere where the spherical wall 312 is located is It is located on the central axis of the groove 310. In the illustrated embodiment, the central axis of the groove 310 is The central axis of the first shaft sleeve 300 coincides with the central axis of the groove 310. The central axis of the groove 310 coincides with the center of the shaft hole 410. It coincides with the axis. In this application, the depth h of the groove 310 is the spherical wall 31 of the groove 310. When 2 is in perfect condition (i.e., when there are no holes in the spherical wall 312), the groove 310 This refers to the maximum distance from the groove wall to the plane where the groove opening of the recessed groove 310 is located; see Figure 31. Then, the depth h of the groove 310 is the spherical notch where the spherical wall 312 is located (the bottom surface of the spherical notch is the groove 31 This refers to the height at which the groove (0) is flush with the plane on which it is located.

[0082] In one embodiment, the depth h of the groove 310 is 0 of the radius R of the sphere on which the spherical wall 312 is located. The ratio is between 0.6 and 1, i.e., 0.6R ≤ h ≤ R. Within this range, the groove 310 is radially It has a position-limiting effect and prevents the sliding part 220 from sliding away from the groove 310. Furthermore, the diameter of the recessed groove 310 is aligned with the axis of the first shaft sleeve 300 and the second shaft sleeve 40 It tends to gradually increase in the direction approaching 0, thereby causing the sliding part 220 to move into the groove 310 It is easy to insert inside, and the groove 310 adapts to the requirements of the radial oscillation range of the sliding part 220. It has an appropriate width.

[0083] In one embodiment, referring to Figures 28 to 31, the depth h of the groove 310 is the shaft portion 210 It is more than half the height of the spherical crown surface 221 in the axial direction, and therefore, the groove of the concave groove 310 The wall has a sufficient radial width for the sliding part 220 to slide, and the sliding part 220 is recessed into the groove 310 This prevents sliding away from the object.

[0084] In one embodiment, the edges of the groove opening of the groove 310 are rounded, A first rounded chamfer 311 is formed on the edge of the groove, and the sliding portion 220 is on the edge of the groove which has corners Thus, it is avoided from being damaged and worn. In the embodiment shown in FIG. 28, the first chamfer 311 is located at the distal end of the spherical wall 312, so that the groove wall of the concave groove 310 gently transitions from the spherical wall 31 2 to the end face of the distal end of the first shaft sleeve 300.

[0085] In some embodiments, referring to FIGS. 26 and 27, the first shaft sleeve 300 further has a cleaning liquid hole 320 through which the cleaning liquid flows. The cleaning liquid hole 320 is in fluid communication with the concave groove 310, and the aperture diameter of the cleaning liquid hole 320 is smaller than the diameter of the sphere on which the spherical wall 312 is located. Specifically the opening at one end of the cleaning liquid hole 320 is located on the end face of the proximal end of the first shaft sleeve 300, and the opening at the other end is located on the spherical wall 312. The cleaning liquid hole 320 communicates with the cleaning line in the catheter 40 and can be in fluid communication with the cleaning line, so that the cleaning liquid can flow into the concave groove 310 through the cleaning liquid hole 320. The aperture diameter of the cleaning liquid hole 320 is smaller than the diameter of the sphere on which the spherical crown surface 221 is located. Specifically, the central axis of the cleaning liquid hole 320 passes through the center of the concave groove 310 or the center of the sphere on which the spherical wall 31 2 is located. Thereby, the cleaning liquid can flow better between the groove wall of the concave groove 310 and the sliding part

[0086] 220, play a lubricating role, reduce the friction coefficient between the sliding part 220 and the groove wall of the concave groove 310, or reduce the friction coefficient between the spherical crown surface 221 and the spherical wall 312, not only reduce the wear between the sliding part 220 and the first shaft sleeve 300 but also the cleaning liquid flowing into the concave groove 310 from the cleaning liquid hole 320 can play a role of fluid floating support for the sliding part 220. The cleaning liquid can flow out of the concave groove 310 through the opening of the concave groove 310 through the opening of the concave groove 310. and the cleaning liquid flowing into the concave groove 310 from the cleaning liquid hole 320 can play a role of fluid floating support for the sliding part 220. The cleaning liquid can flow out of the concave groove 310 through the opening of the concave groove 310 It flows out and into the chamber 101 of the housing 100. The cleaning fluid hole 320 is straight These are holes that reduce the energy consumption of the cleaning solution in the cleaning solution holes 320.

[0087] In one embodiment, the cleaning liquid hole 320 has a first opening 321, and the first opening 321 is a cleaning The first opening 321 is located at one end adjacent to the groove 310 of the liquid purification hole 320, and the diameter of the opening is the spherical crown surface 2 It is 1 / 9 to 1 / 3 of the diameter of 21. The diameter of the first opening 321 of the cleaning fluid hole 320 is too large. As a result, the contact surface between the sliding part 220 and the side wall of the groove 310 becomes smaller (receiving per unit area) The pressure increases, which increases the wear of the sliding part 220 by the groove wall of the recessed groove 310. If the diameter of the opening 321 is too small, the cleaning fluid flowing from the cleaning fluid hole 320 into the groove 310 will The amount of cleaning fluid that flows into the cleaning fluid hole 320 is affected, and the cleaning fluid that flows into the cleaning fluid hole 320 exerts an impact force on the sliding part 220. At the same time, it flows between the sliding part 220 and the groove wall of the recessed groove 310, providing lubrication to the sliding part In order to reduce the coefficient of friction between 220 and the groove wall of the groove 310, the flow into the groove 310 It is undesirable for the amount of cleaning solution to be too small. Also, the first opening 321 of the cleaning solution hole 320 The edges are provided with a second rounded chamfer to prevent the sliding part 220 from being scratched or worn. Avoid. In the illustrated embodiment, the first opening 321 is located on the spherical wall 312. The cleaning liquid is The fluid flows between the spherical wall 312 and the spherical crown surface 221 through the first opening 321, performing a lubricating action. vinegar.

[0088] In some embodiments, referring to Figures 27 and 32, the drive mechanism 10 is a support seat Further includes 810. The support seat 810 is fixedly connected to the housing 100. Support seat 810 has a mounting chamber 811 and an inlet hole 814 that communicates with the mounting chamber 811. The first shaft sleeve 300 is attached to the mounting chamber 811, and the cleaning fluid hole 320 is It communicates with the fluid inlet hole 814. One end of the fluid inlet hole 814 that is away from the mounting chamber 811 is a catheter. It is connected to the cleaning line of Tel 40, thereby the cleaning fluid is supplied to the inlet hole 814 and the cleaning fluid hole 32 After flowing through 0 between the groove wall of the recessed groove 310 and the sliding part 220, the housing 100 It can flow into chamber 101.

[0089] In one embodiment, the mounting chamber 811 has a chamber bottom 812 and an inlet hole 814 The second opening 815 is located at the bottom 812 of the mounting chamber 811. Within 1, a support step portion 813 is provided, and the support step portion 813 is connected to the first shaft sleeve 300 By bringing them into contact, the first shaft sleeve 300 and the chamber bottom 812 are separated by a certain distance, and then cleaning is performed. To better ensure the smooth flow of the liquid. Specifically, the support step portion 813 is the first axis It contacts the side of the LEAV 300 that is away from the second axis sleeve 400.

[0090] Specifically, a branch channel 816 is further formed in the support seat 810, and the branch channel 816 is The fluid (for example, cleaning fluid) flowing through the inlet hole 814 is in fluid communication with the inlet hole 814, and further It can flow into the chamber 101 of the housing 100 via the branch channel 816. In terms of structure, the branch channel 816 has one end connected to the first shaft sleeve 300 and the mounting chamber 811. It communicates with the space between the bottom 812 and the chamber, and the other end communicates with the chamber 101. Actual In this example, the branch channel 816 is formed by a recess in a portion of the chamber wall of the mounting chamber 811. In other words, under normal conditions, the cleaning fluid enters the mounting chamber 811 from the inlet hole 814. After flowing in, it branches into two, one of which flows through the cleaning fluid hole 320 to the first shaft sleeve 300. The water flows into the groove 310, and the rest flows out through the branch channel 816. This ensures the flow of cleaning fluid when the sliding part 220 blocks the cleaning fluid hole 320. It is possible.

[0091] In the embodiment shown in Figure 32, the number of branch channels 816 is 2, and the two branch channels 8 Numbers 16 are provided opposite each other. The number of branch channels 816 can be adjusted as needed in the design. For example, in some embodiments, the number of branched channels 816 may be one or two. You may have more than one.

[0092] In some embodiments, referring to Figures 24 to 26, the stopper member 500 is the shaft Fixedly connected to part 210, the stopper member 500 is connected to the first shaft sleeve 300 and the second shaft sleeve Located between the sleeve 400 and the stopper member 500, the stopper member 500 abuts against the second shaft sleeve 400. As a result, the second shaft sleeve 400 is positioned such that the shaft portion 210 is directed toward the second shaft sleeve 400. The range of movement can be restricted. Specifically, the stopper member 500 is thrust Ring 510 may be selected.

[0093] In some embodiments, when the stopper member 500 contacts the second shaft sleeve 400 In addition, the stopper member 500 does not seal the shaft hole 410 of the second shaft sleeve 400, so cleaning The liquid flows through the gap between the stopper member 500 and the second shaft sleeve 400 into the second shaft sleeve It can flow into the shaft hole 410 of the 400, that is, the shaft hole 410 of the second shaft sleeve 400 and To achieve fluid communication with the chamber 101. Specifically, the outer diameter of the thrust ring 510 The thrust ring 5 is smaller than the outer diameter of the second rotor 620 and the second shaft sleeve 400. The outer diameter of 10 is larger than the diameter of the shaft hole 410, and the thrust ring 510 is the second shaft three The thrust ring 510 contacts the 400, and the thrust ring 510 contacts the second shaft sleeve 400 and the second rotor 620. The two are separated by a certain distance. The second rotor 620 and the second shaft sleeve 400 make direct contact. In contrast to this, the thrust ring 510 has a second shaft sleeve 400 and a stopper member 50 The friction area between zero and zero can be reduced.

[0094] In other embodiments, the thrust ring 510 is made up of multiple fan-shaped rings arranged in a row. Often, the multiple fan-shaped rings are arranged around the shaft portion 210 at equal intervals, or circumferentially Multiple sector-shaped rings, discretely arranged in a direction, may be present.

[0095] Specifically, referring to Figure 33, one side of the stopper member 500 of the second shaft sleeve 400. A portion of it is recessed to form a flow guide groove 420, and the flow guide groove 420 is the shaft hole of the second shaft sleeve 400 When the stopper member 500 is in contact with the second shaft sleeve 400, the flow guide groove 4 is in communication with 410. A portion of 20 is not covered by the stopper member 500. For example, if the thrust ring 510 is second When the thrust ring 510 contacts the shaft sleeve 400, the thrust ring 510 enters the shaft hole of the second shaft sleeve 400. The gap between 410 and the shaft portion 210 is sealed, but the flow guide is not covered by the thrust ring 510. The groove 420 allows fluid communication when the thrust ring 510 contacts the second shaft sleeve 400. This can be achieved and the smooth flow of the cleaning solution can be guaranteed. Also, the second axis sleeve 40 A portion of the surface of 0 facing the stopper member 500 is recessed to form a flow guide groove 420, The cleaning fluid flows more effectively between the stopper member 500 and the second shaft sleeve 400, and the stopper It provides lubrication to the contact surface between member 500 and second shaft sleeve 400, and the stopper part The friction between material 500 and the second shaft sleeve 400 is reduced, and the stopper member 500 and the second shaft sleeve Reduces wear problems caused by friction between the leaf 400 and the stopper member 500 and the second axis sleeve. It provides heat dissipation for the 400.

[0096] In some embodiments, referring to Figures 26 and 33, the second shaft sleeve 400 is It includes a first annular body 401 and a second annular body 402, the diameter of the first annular body 401 being the diameter of the second annular body Smaller than the diameter of body 402, the near end of the first annular body 401 is connected to the far end of the second annular body 402. In the illustrated embodiment, the first annular body 401 and the second annular body 402 are integrally molded. The second annular body 402 has a flow guide groove 420. The housing 100 has the first annular body 401 It has a mounting hole 102 that fits, and the mounting hole 102 is located at the far end of the housing 100, A position-restricting projection 103 is provided on the inner wall of the wedge 100, and the position-restricting projection 103 is the mounting The first annular body 401 is mounted inside the mounting hole 102, surrounding the hole 102, and the second annular body 4 02 abuts against the end face of the near end of the position limiting projection 103, thereby the second axial sleeve 400 This enables positioning and mounting, contributing to the stable mounting of the second axis sleeve 400. .

[0097] In this embodiment, the first shaft sleeve 300, the second shaft sleeve 400 and the stopper member 5 At least one of the 00 is made of a ceramic material. Compared to metal materials, ceramic The material has high processing precision, high biocompatibility and mechanical strength, and good wear resistance and corrosion resistance. It has properties. In some embodiments, the first axial sleeve 300 and the second axial sleeve 40 At least one of the 0s is the shaft sleeve body and the da provided on the surface of the shaft sleeve body It has a diamond coating and the surface of the first axial sleeve 300 and the second axial sleeve 400 The surface is smoothed to improve wear resistance. In this case, the material of the shaft sleeve body has a certain rigidity. The material may be one that possesses properties, such as metal or ceramic.

[0098] Specifically, the hole wall of the shaft hole 410, the surface of the shaft portion 210, the surface of the sliding portion 220, and the groove 31 The roughness of at least one of the groove walls of 0 is 0.1 micrometers or less, and this The frictional force between the shaft portion 210 and the hole wall of the shaft hole 410, and the frictional force between the sliding portion 220 and the groove 310. It effectively reduces frictional force between the wall and the wall.

[0099] Referring to Figures 25, 26, and 34, the drive mechanism 10 further... Including, the first rotor 610 is fixedly connected to the rotating shaft 200, and the first rotor 610 is the It is located between the first axis sleeve 300 and the second axis sleeve 400, and the first rotor 610 and the first axis There is a gap between the sleeve 300 and the first rotor 610 and the first shaft sleeve. To avoid wear between the 300 and the drive mechanism 10, and to reduce the operating resistance of the drive mechanism 10. Specifically, the first The rotor 610 is fixedly connected to the position limiting surface 223 of the sliding portion 220. 23 increases the connection area between the first rotor 610 and the rotating shaft 200, and the first rotor 61 The connection stability of 0 can be improved. The position limiting surface 223 is relative to the first rotor 610. The first rotor 610 is positioned along the axis of the shaft portion 210. The distance to move in the direction approaching the sleeve 300 is limited. Preferably, the first rotor 61 0 is fixed to the position limiting surface 223 by adhesive, welding, etc. A cylindrical surface having a certain length 222 increases the distance between the first rotor 610 and the first shaft sleeve 300. This allows the first rotor 610 to come into contact with the first shaft sleeve 300 when the rotating shaft 200 oscillates. This prevents sticking of the rotating axis 200.

[0100] The first rotor 610 includes a first flywheel 611 and a first magnet 612, and the first fl The flywheel 611 is fixedly connected to the rotating shaft 200, for example, the first flywheel 6 11 is fixedly connected to the position limiting surface 223. The first magnet 612 is connected to the first flywheel It is fixedly connected to the 611. In some embodiments, the first magnet 612 is annular This is a Halbach array magnet. In the illustrated embodiment, the first rotor 610 is located in chamber 10 Located at 1, the first rotor 610 is rotatable relative to the housing 100 and rotates It can drive the rotation of axis 200.

[0101] In some embodiments, referring to Figures 25 and 26, the drive mechanism 10 is a stay Further includes the stator 700. The stator 700 and the first rotor 610 are aligned with the axis of the shaft portion 210. The stator 700 is provided with a connection between the first shaft sleeve 300 and the second shaft sleeve 400. It is located at [location]. Specifically, the stator 700 rotates the first magnet 612 of the first rotor 610. It can generate a rotating magnetic field that drives the first rotor 610 and the stator 700. By providing it along the axis of part 210, the overall diameter of the drive mechanism 10 can be reduced. Yes, it is possible. In the illustrated embodiment, the stator 700 is fixedly attached to the housing 100. The stator 700 is located in the chamber 101, and the shaft portion 210 is located in the stator 700. It is rotatably mounted through. Preferably, the stator 700 is connected to the first rotor 610. It is located between the topper member 500 and the other member.

[0102] In some embodiments, the drive mechanism 10 further includes a second rotor 620, and the second rotor The rotor 620 is fixedly connected to the shaft portion 210, and the second rotor 620 is connected to the first shaft sleeve 3 It is located between 00 and the second shaft sleeve 400. In the illustrated embodiment, the stopper member 5 00 is located between the second rotor 620 and the second shaft sleeve 400. Stopper member 50 0 is fixedly connected to at least one of the second rotor 620 and the shaft portion 210. Therefore, the stopper member 500, the rotating shaft 200, and the second rotor 620 rotate in synchronously. It moves. In other words, the stopper member 500 is directly fixed only to the second rotor 620. It may also be fixed directly to the shaft portion 210, and the second rotor 620 and the shaft portion 210 They can also be directly fixed to both simultaneously.

[0103] In one embodiment, referring to Figures 24, 25, and 35, the specifics of the second rotor 620 The basic structure includes a second flywheel 621 and a second magnet 622. 621 is fixedly connected to the shaft portion 210, and the second magnet 622 is connected to the second flywheel 62 It is fixedly connected to 1. In some embodiments, the second magnet 622 is an annular halberd. It is a magnet arrangement. The structure of the second flywheel 621 is the same as that of the first flywheel 6 The structure may be the same as in 11, and the explanation will be omitted here.

[0104] In the illustrated embodiment, the thrust ring 510 is the first rod of the second flywheel 621. This is an annular projection formed on the side away from the thrust ring 610. The iWheel 621 is a one-piece molded structure, formed as a single unit, easy to install, and adhesive operation The construction process is omitted. Also, the thrust ring 510 and the second rotor 620 are separate before assembly. It may be a structure, in which case the thrust ring 510 is bonded or welded to the second row It may be fixed to at least one of the 620 or the shaft portion 210.

[0105] In some embodiments, referring to Figures 25, 26, and 36, the stator 700 It includes a magnetic core 710 and a coil 720 wound around the magnetic core 710. 0 has a roughly columnar structure, that is, the magnetic core 710 has a wide head (i.e., pole pee). There is no pole piece. Compared to the magnetic core 710 which has a pole piece, the columnar magnetic core 7 10 reduces magnetic loss between the magnetic core 710 and the first magnet 612 and the second magnet 622. The magnetic coupling density between the first magnet 612 and the second magnet 622 is increased, and the stator 7 It can increase the torque of 00 (under the same current conditions). Also, a magnetic without a head. Core 710 is affected by localized magnetic short circuits caused by contact between adjacent magnetic cores 710 and motor power The problem of a decrease in can be significantly reduced. Specifically, the extension method of the magnetic core 710 The direction coincides with the axial direction of the housing 100 or the axis of the shaft portion 210.

[0106] The first rotor 610, stator 700, and second rotor 620 are aligned along the axis of the shaft portion 210. They are provided in that order. In the illustrated embodiment, the stator 700 is along the axis of the shaft portion 210 It includes a first stator unit 701 and a second stator unit 702 provided therein, Both the stator unit 701 and the second stator unit 702 are connected to the magnetic core 71. The first stator unit 701 includes the coil 720 mentioned above. The first stator unit 701 controls the rotation of the first rotor 610. The second stator unit 702 can drive the rotation of the second rotor 620. It can be moved. The first stator unit 701 and the second stator unit 702 are The displacement is also fixedly housed in the chamber 101 of the housing 100. The shaft portion 210 is the first A rotatably penetrating stator unit 701 and second stator unit 702 is provided. . First rotor 610, first stator unit 701, second rotor 620 and second stator The units 702 are arranged sequentially along the direction of the axis.

[0107] Specifically, the drive mechanism 10 is a permeable member 820 fixedly connected to the housing 100. The magnetic core 710 of the first stator unit 701 and the second stator unit The magnetic cores 710 of 702 are all fixedly connected to the permeable member 820. Shaft portion 210 It is provided so as to rotatably penetrate the permeable member 820. The permeable member 820 closes the magnetic path. The permeable member 8 plays a role in promoting and increasing the generation of magnetic flux and improving coupling ability. Providing 20 is necessary for the magnetic path between the first stator unit 701 and the first rotor 610 and It serves to close the magnetic path between the second stator unit 702 and the second rotor 620. Since the magnetic flux can be increased, providing the permeable member 820 is beneficial to the entire drive mechanism 10. This is advantageous in reducing the overall diameter. Also, the first stator unit 701 and the second stator unit To achieve positioning and mounting with the data unit 702, the permeable member 820 and The wagging 100 may be directly and fixedly connected, and the first stator unit 701 and the second This reduces the difficulty of assembly with the stator unit 702. Specifically, the permeable member 820 It includes two permeable plates 821, the two permeable plates 821 are stacked, and one of the permeable plates 821 is The magnetic core 710 of the first stator unit 701 is fixedly connected to the other permeable plate 821. This is fixedly connected to the magnetic core 710 of the second stator unit 702.

[0108] Since the drive mechanism of this embodiment has the same structure as the drive mechanism of the first embodiment, the drive mechanism of this embodiment The dynamic mechanism and the blood pump equipped therewith also produce the same effects as in the first embodiment.

[0109] The above embodiments are merely for illustrating the technical solutions of the present invention and do not limit them. No. The present invention has been described in detail with reference to the above-mentioned examples, but those skilled in the art will understand that Modify the technical solutions described in each of the above embodiments, or modify some of the technical features thereof. Equivalent replacements can be made for these, and these modifications and replacements are the corresponding technologies. The essence of the solution means will not deviate from the spirit and scope of the technical solution means of each embodiment of the present invention. Rather, both should fall within the scope of protection of the present invention.

Claims

1. A drive mechanism configured to drive the rotation of an impeller, wherein the drive mechanism is Housing and A rotating shaft having a connecting end configured to be connected to the impeller and a ball head end that is separated from the connecting end, A rotor fixedly connected to the aforementioned rotating shaft, A first shaft sleeve and a second shaft sleeve, both of which are attached to the housing, the first shaft sleeve has a groove formed therein, the groove has a recessed spherical wall, the rotating shaft is provided rotatably through the second shaft sleeve, the ball head end is provided movably in the groove and is able to contact the spherical wall, and the rotor is located between the first shaft sleeve and the second shaft sleeve, The stopper member includes, fixedly connected to at least one of the rotating shaft and the rotor, positioned between the rotor and the second shaft sleeve, and capable of contacting the second shaft sleeve, The first shaft sleeve is further formed with a fluid passage hole communicating with the groove, and the drive mechanism further includes a support seat fixedly connected to the housing, the support seat is formed with a mounting chamber and an inlet hole communicating with the mounting chamber, the first shaft sleeve is attached to the mounting chamber, and the fluid passage hole is in fluid communication with the inlet hole, The drive mechanism is characterized in that a branched channel is further formed in the support seat, and the branched channel communicates with the inlet hole, so that fluid flowing into the inlet hole can flow into the housing via the branched channel.

2. The groove has a groove opening, the rotating shaft is provided penetrating the groove opening, and the groove opening of the groove is chamfered. The drive mechanism according to claim 1, characterized in that and / or, the length of the ball head end in the axial direction of the rotating shaft is less than the depth of the groove.

3. The opening of the liquid passage hole is located in the spherical wall, The drive mechanism according to claim 1, characterized in that the opening is located at the center of the spherical wall, and / or the diameter of the opening is 1 / 9 to 1 / 3 of the diameter of the sphere on which the ball head end is located.

4. The drive mechanism according to claim 1, characterized in that the mounting chamber has a chamber bottom, the opening of the liquid inlet hole is located at the bottom of the chamber, a support step is provided inside the mounting chamber, the support step contacts the first shaft sleeve, and separates the first shaft sleeve and the bottom of the chamber by a certain distance.

5. The drive mechanism according to claim 1, wherein the second shaft sleeve has a shaft hole and a locking surface perpendicular to the central axis of the shaft hole, the rotating shaft is provided rotatably through the shaft hole, and the stopper member has a stopper surface perpendicular to the axis of the rotating shaft, the stopper surface faces the locking surface and is capable of contacting the locking surface.

6. The roughness of at least one of the stopper surface and the locking surface is 0.1 micrometers or less. Alternatively, at least one of the stopper surface and the locking surface is a ceramic surface. Alternatively, the drive mechanism according to claim 5, characterized in that the material of the stopper surface is diamond.

7. A partition ring is provided within the housing, the partition ring divides the chamber of the housing into a position-restricting chamber and a housing chamber, the position-restricting chamber and the housing chamber are provided along the axis of the rotation shaft, the second shaft sleeve is housed in the position-restricting chamber and abuts against the partition ring, and the rotor is housed in the housing chamber, so that the partition ring is located between the second shaft sleeve and the rotor. The drive mechanism according to claim 1, characterized in that when the stopper member contacts the second shaft sleeve, at least a portion of the stopper member is located on the inner ring of the partition ring, there is a gap for fluid to flow between the stopper member and the inner ring wall of the partition ring, and there is a certain distance between the partition ring and the rotor.

8. The drive mechanism according to claim 7, characterized in that a shaft hole is formed in the second shaft sleeve, the rotating shaft is provided rotatably through the shaft hole, there is a gap between the rotating shaft and the hole wall of the shaft hole through which fluid flows, a part of the surface of the second shaft sleeve facing the stopper member is recessed to form a flow guide groove, the flow guide groove communicates with the shaft hole, and when the stopper member abuts against the second shaft sleeve, a part of the flow guide groove is not covered by the stopper member.

9. The rotor includes a first rotor and a second rotor provided along the axis of the rotation shaft, both of which are fixedly connected to the rotation shaft, both of which are located between the first shaft sleeve and the second shaft sleeve, and the stopper member is located between the second rotor and the second shaft sleeve. The drive mechanism further includes a stator capable of driving the rotation of the rotor, the stator includes a first stator unit and a second stator unit provided along the axis of the rotation shaft, both the first stator unit and the second stator unit are located between the first rotor and the second rotor, the first stator unit is capable of driving the rotation of the first rotor, and the second stator unit is capable of driving the rotation of the second rotor, both the first stator unit and the second stator unit include a magnetic core and a coil wound around the magnetic core, The drive mechanism further includes a permeable member fixedly connected to the housing, the magnetic core of the first stator unit and the magnetic core of the second stator unit are both fixedly connected to the permeable member, and the rotating shaft is provided rotatably through the first stator unit, the second stator unit and the permeable member, as described in claim 1.

10. A blood pump comprising an impeller and a drive mechanism according to any one of claims 1 to 9, A blood pump characterized in that the impeller is connected to the connecting end of the rotating shaft and can rotate along the rotating shaft.

11. The blood pump according to claim 10, further comprising a cannula assembly connected to the drive mechanism, the cannula assembly comprising an insertion tube, a connecting tube fitted to the insertion tube, and an outlet tube fitted to the connecting tube, wherein the inner wall of one end of the connecting tube is connected to the outer wall of the insertion tube, the outlet tube comprising a connecting portion and an outlet portion away from the connecting tube, the outer wall of the connecting portion is connected to the inner wall of the end of the connecting tube away from the insertion tube, and the impeller is rotatably mounted on the outlet tube.

12. The blood pump according to claim 11, wherein a position-restricting projection ring is provided on the inner wall of the connecting tube, the position-restricting projection ring is provided so as to protrude in an annular shape from the inner wall of the connecting tube, the position-restricting projection ring has a first end face and a second end face provided along the axial direction of the connecting tube, the first end face abuts against the end of the insertion tube, and the second end face abuts against the end of the connection portion.

13. The blood pump according to claim 12, characterized in that the first end face protrudes radially from the inner wall of the connecting tube more than the second end face, the edge of the first end face and the edge of the second end face are connected via a transition surface, the edge of the first end face is flush with the inner wall of the insertion tube, the edge of the second end face is flush with the inner wall of the outlet tube, and the transition surface is provided as one of a convex curved surface, a concave curved surface, or an inclined surface.

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