Drive control mechanism

Abstract

The invention provides a driving control mechanism which is applied to a left ventricle assisting device, the left ventricle assisting device further comprises a transmission shaft, the driving control mechanism comprises a shell, a twisting shell driving module and a mandrel driving module, the twisting shell driving module and the mandrel driving module are sequentially arranged in the shell, and the far end of the twisting shell driving module is in transmission connection with a twisting shell of the transmission shaft. The far end of the mandrel driving module is in transmission connection with a mandrel of the transmission shaft and is detachably connected with the near end of the twisting shell driving module. When the far end of the mandrel driving module is connected with the near end of the twisting shell driving module, the mandrel driving module drives the mandrel and the twisting shell to rotate synchronously. When the far end of the mandrel driving module is separated from the near end of the twisting shell driving module, the twisting shell driving module drives the twisting shell to rotate relative to the mandrel. According to the driving control mechanism, synchronous or relative rotation of the mandrel and the twisting shell can be achieved, then folding, unfolding and rotating movement of a pump head impeller in the left ventricle auxiliary device is achieved, and the use efficiency and safety of the left ventricle auxiliary device are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of drive mechanisms, and in particular to a drive control mechanism. Background Art

[0002] In the past decade, the number of high-risk cardiovascular interventional surgeries at home and abroad has increased year by year. In order to reduce the risk of death caused by blood circulation obstruction or cessation during surgery, interventional left ventricular assist devices have been widely used in high-risk cardiovascular interventional surgeries.

[0003] An interventional left ventricular assist device is a percutaneous mechanical circulatory assist system that uses a mechanical micropump to provide auxiliary blood flow to high-risk cardiovascular interventional surgery patients during and after surgery. It can partially or completely assist the function of the left ventricle and help the heart deliver oxygenated blood to the whole body. Existing interventional left ventricular assist devices mainly control the pump head impeller to rotate in a single direction with a fixed outer diameter through a drive mechanism. The auxiliary flow rate it generates is difficult to achieve the expected result. At the same time, when the pump head impeller rotates at a high speed in a single direction, it will inevitably cause excessive shear force inside the blood, leading to changes in red blood cell permeability and irreversible cell damage, thereby increasing the risk of hemolysis in patients. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a driving control mechanism to improve the use efficiency and safety of the left ventricular assist device and reduce the harm to the human body.

[0005] In order to solve the above technical problems, the present invention provides a drive control mechanism, which is applied to a left ventricular assist device, wherein the left ventricular assist device further includes a transmission shaft, and the drive control mechanism includes:

[0006] case;

[0007] A twisting shell driving module, wherein the twisting shell driving module is disposed in the housing, and a far end of the twisting shell driving module is transmission-connected to the twisting shell of the transmission shaft; and

[0008] A spindle drive module is disposed in the housing and arranged at the proximal end of the twisting shell drive module, and the distal end of the spindle drive module is connected to the spindle of the transmission shaft and is detachably connected to the twisting shell drive module, wherein

[0009] When the core shaft driving module is connected to the twisting shell driving module, the core shaft driving module drives the core shaft and the twisting shell to rotate synchronously; and when the core shaft driving module is separated from the twisting shell driving module, the twisting shell driving module drives the twisting shell to rotate relative to the core shaft.

[0010] In one embodiment, the twisting shell driving module comprises:

[0011] A twisting shell connector, wherein the twisting shell connector is fixedly connected to the twisting shell, and a proximal end of the twisting shell connector is detachably connected to a distal end of the mandrel drive module; and

[0012] A twisting gear set is arranged at the distal end of the twisting shell connecting member and is used to control the rotation of the twisting shell connecting member when the distal end of the core shaft driving module is separated from the proximal end of the twisting shell driving module.

[0013] In one embodiment, the twisting gear set comprises:

[0014] The first twisting gear shaft;

[0015] A first twisting gear, wherein the first twisting gear is sleeved on the first twisting gear shaft and is fixedly connected to the twisting shell connecting member through the first twisting gear shaft;

[0016] a first twisting gear shaft bearing, the first twisting gear shaft bearing being disposed at a distal end of the first twisting gear shaft and rotatably supporting the first twisting gear shaft in the housing;

[0017] A twisting shell connector bearing, wherein the twisting shell connector bearing is disposed in the middle section of the twisting shell connector and rotatably supports the twisting shell connector in the housing; and

[0018] a second gear set, wherein the second gear set is detachably meshed with the first twisting gear and controls the first twisting gear to rotate when the second gear set is meshed with the first twisting gear;

[0019] Optionally, the first twisting gear shaft is configured as a shaft body having multiple steps, and the proximal end of the first twisting gear shaft is sleeved and fixed to the distal end of the twisting shell connector;

[0020] Optionally, the twisting shell driving module also includes a twisting shell sleeve and a twisting shell sleeve bearing, the twisting shell sleeve bearings are respectively sleeved at both ends of the twisting shell sleeve, the twisting shell sleeve is sleeved on the proximal end of the twisting shell, and is arranged at the proximal end of the first twisting gear shaft.

[0021] In one embodiment, the second gear set comprises:

[0022] A second twisting gear shaft;

[0023] a second twisting gear, the second twisting gear being sleeved on the second twisting gear shaft and being detachably meshed with the first twisting gear;

[0024] a second twisting gear shaft bearing, the second twisting gear shaft bearing being disposed between the second twisting gear shaft and the second twisting gear;

[0025] a second twisting gear limiting member, wherein the second twisting gear limiting members are respectively arranged at both ends of the second twisting gear shaft and are fixedly connected to the second twisting gear shaft, one side of the second twisting gear limiting member is inserted into the housing, and the other side of the second twisting gear limiting member extends out of the housing and supports the second twisting gear on the outside of the housing; and

[0026] The second twisting gear reset elastic member is arranged between the second twisting gear limiter and the housing and separates the second twisting gear from the first twisting gear.

[0027] In one embodiment, the spindle drive module comprises:

[0028] A mandrel connecting piece, the mandrel connecting piece is sleeved on the outside of the mandrel and fixedly connected to the mandrel;

[0029] A coupling, wherein the distal end of the coupling is fixedly connected to the core shaft connector, and the proximal end of the coupling is fixedly connected to the drive motor;

[0030] A clutch, the clutch is arranged at the distal end of the mandrel connector and sleeved on the outside of the mandrel, the clutch is synchronously rotated and connected with the mandrel connector, and the clutch is detachably connected with the twisting shell connector; and

[0031] A clutch resetting elastic member, wherein the clutch resetting elastic member is arranged between the spindle connecting member and the clutch;

[0032] Optionally, the spindle drive module further comprises a spindle connector bearing, wherein the spindle connector bearing is sleeved at the proximal end of the spindle connector and rotatably supports the spindle connector in the housing.

[0033] In one embodiment, the spindle drive module further includes:

[0034] Braking components are arranged in pairs on both sides of the coupling and are used to brake the coupling.

[0035] In one embodiment, the brake assembly comprises:

[0036] A brake slider, wherein the brake slider is arranged outside the housing;

[0037] A brake member, wherein a large end of the brake member extends out of the housing and is slidably connected to the brake member slider, and a small end of the brake member is inserted into the housing and cooperates with an outer wall of the coupling; and

[0038] A pair of brake member reset elastic members, wherein the pair of brake member reset elastic members are arranged between the brake member and the housing, one end of the pair of brake member reset elastic members is inserted into the corresponding mounting hole of the brake member, and the other end of the pair of brake member reset elastic members is inserted into the corresponding mounting hole of the housing;

[0039] Optionally, the brake member slider has a wedge-shaped bottom surface, the large end of the brake member is provided with a limiting groove, and the wedge-shaped bottom surface and two side surfaces of the brake member slider are in contact with the arc-shaped top surface and two side surfaces of the limiting groove respectively.

[0040] In one embodiment, the spindle drive module further includes:

[0041] A clutch shift ring, which is slidably sleeved outside the housing and has a clutch fork mounting hole in the radial direction; and

[0042] A clutch fork, the clutch fork being arranged in the clutch fork mounting hole and passing through the housing to cooperate with the clutch, so that the clutch can be driven to move by operating the clutch ring to separate or connect the clutch and the twisting shell connector;

[0043] Optionally, the clutch ring includes a first clutch ring and a second clutch ring, and the first clutch ring and the second clutch ring are arranged opposite to each other to form the annular clutch ring.

[0044] In one embodiment, the drive control mechanism further includes:

[0045] A protective cover driving module, wherein the protective cover driving module is sleeved on the proximal end of the protective cover of the transmission shaft and is drivingly connected to the proximal end of the protective cover, and the protective cover is driven to move by the protective cover driving module;

[0046] Optionally, the protective cover driving module includes a protective cover slider, a protective cover slider bearing and a protective cover slider end cover, wherein the protective cover slider is sleeved at the proximal end of the protective cover and fixedly connected to the protective cover; the protective cover slider bearing is embedded in the proximal ring groove of the protective cover slider, and the outer edge of the protective cover slider bearing is limited between the proximal ring groove of the protective cover slider and the protective cover slider end cover; the protective cover slider end cover is arranged at the proximal end of the protective cover slider and fixedly connected to the sleeve slider;

[0047] Optionally, the protective cover driving module comprises at least two protective cover slider bearings, wherein the at least two protective cover slider bearings are embedded in the proximal ring groove of the protective cover slider and make the distal end surface of the protective cover slider bearing away from the end cover of the protective cover slider contact with the proximal end surface of the protective cover;

[0048] Optionally, the protective cover slider is provided with a protective cover slider locking piece, and the protective cover slider locking piece cooperates with corresponding structures at different positions of the shell to lock the protective cover slider at different positions of the shell.

[0049] In one embodiment, the housing comprises:

[0050] a first housing; and

[0051] A second shell, the second shell is arranged opposite to the first shell and forms a cavity structure inside;

[0052] Optionally, the shell further includes a distal cover, a second gear set cover, a brake assembly cover and a proximal cover, the distal cover and the proximal cover are respectively arranged at the distal end and the proximal end of the shell, the second gear set cover is arranged on the outside of the second gear set, and the brake assembly cover is arranged on the outside of the brake assembly.

[0053] The above solution of the present invention includes at least the following beneficial effects:

[0054] The drive control mechanism provided by the above scheme of the present invention includes: a housing, a twisting shell driving module and a core shaft driving module, wherein the twisting shell driving module is arranged in the housing, and the distal end of the twisting shell driving module is connected to the twisting shell of the transmission shaft. The core shaft driving module is arranged in the housing and arranged at the proximal end of the twisting shell driving module, and the distal end of the core shaft driving module is connected to the core shaft of the transmission shaft and is detachably connected to the twisting shell driving module, wherein when the core shaft driving module is connected to the twisting shell driving module, the core shaft driving module drives the core shaft and the twisting shell to rotate synchronously; and when the core shaft driving module is separated from the twisting shell driving module, the twisting shell driving module drives the twisting shell to rotate relative to the core shaft. By connecting or separating the core shaft driving module and the twisting shell driving module, the synchronous rotation or relative rotation of the core shaft of the transmission shaft and the twisting shell in the left ventricular assist device can be realized, thereby realizing the folding or rotation of the pump head impeller fixedly connected to both the core shaft and the twisting shell, so as to improve the use efficiency and safety of the auxiliary device. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 is a schematic diagram of the three-dimensional structure of a left ventricular assist device provided by an optional embodiment of the present invention;

[0056] Figure 2 is a cross-sectional view of a drive control mechanism provided by an optional embodiment of the present invention;

[0057] Figure 3 is a schematic diagram of the three-dimensional structure of a housing provided by an optional embodiment of the present invention;

[0058] Figure 4is an exploded view of a housing provided by an optional embodiment of the present invention;

[0059] Figure 5 It is a three-dimensional structural schematic diagram of a twisting shell driving module provided by an optional embodiment of the present invention;

[0060] Figure 6 is an exploded view of some components of a twisting shell driving module provided by an optional embodiment of the present invention;

[0061] Figure 7 is an exploded view of a second gear set of a twisting shell driving module provided in an optional embodiment of the present invention;

[0062] Figure 8 is a cross-sectional view of a second gear set of a twisting shell driving module provided by an optional embodiment of the present invention;

[0063] Fig. 9 is a schematic diagram of the three-dimensional structure of a spindle drive module provided by an optional embodiment of the present invention;

[0064] Fig.10 is an exploded view of a spindle drive module provided in an optional embodiment of the present invention;

[0065] Fig.11 is an exploded view of a clutch ring provided by an optional embodiment of the present invention;

[0066] Fig.12 is a cross-sectional view of a clutch and a spindle connection member provided by an optional embodiment of the present invention;

[0067] Fig.13 is a cross-sectional view of a clutch and twisting housing connection member provided by an optional embodiment of the present invention;

[0068] Fig.14 It is a schematic diagram of the assembly of the first housing and the clutch fork provided by an optional embodiment of the present invention;

[0069] Fig.15 It is a schematic diagram of the assembly of the second housing and the clutch fork provided by an optional embodiment of the present invention;

[0070] Fig.16 is an exploded view of a brake assembly provided by an optional embodiment of the present invention;

[0071] Fig.17 is a cross-sectional view of a brake assembly provided by an optional embodiment of the present invention;

[0072] Fig.18 is a partial cross-sectional view of the assembly of the brake assembly and the first housing provided by an optional embodiment of the present invention;

[0073] Fig.19is a partial cross-sectional view of the assembly of the brake assembly and the second housing provided by an optional embodiment of the present invention;

[0074] Fig. 20 is a schematic diagram of the three-dimensional structure of a protective cover driving module provided by an optional embodiment of the present invention;

[0075] Fig.21 is an exploded view of a protective cover driving module provided in an optional embodiment of the present invention;

[0076] Figure 22-29 The diagram shows a process of a left ventricular assist device provided by an optional embodiment of the present invention being transformed from an unfolded state to a folded state;

[0077] Fig.30 is a cross-sectional view of a micro pump head provided by an optional embodiment of the present invention.

[0078] Description of Figure Numbers:

[0079] 100. Left ventricular assist device;

[0080] 1. drive control mechanism; 10. housing; 11. first housing; 111. first protrusion; 112. second protrusion; 113. third protrusion; 114. first optical fiber groove; 12. second housing; 121. fourth protrusion; 122. fifth protrusion; 123. sixth protrusion; 124. second optical fiber groove; 13. distal cover; 14. proximal cover; 15. second gear set cover; 16. brake assembly cover;

[0081] 2. Twisting shell driving module; 21. Second gear set; 211. Second twisting gear limiter; 212. Second twisting gear shaft bearing; 213. Second twisting gear; 214. Second twisting gear shaft; 215. Second twisting gear reset elastic member; 22. Twisting shell shaft sleeve bearing; 23. Twisting shell shaft sleeve; 24. First twisting gear shaft bearing, 25. First twisting gear; 26. First twisting gear shaft; 27. Twisting shell connector bearing; 28. Twisting shell connector;

[0082] 3. Spindle drive module; 31. Clutch fork; 32. Clutch ring; 321. Clutch fork mounting hole; 322. First clutch ring; 323. Second clutch ring; 33. Clutch; 34. Clutch reset elastic member; 35. Spindle connector; 36. Spindle connector bearing; 37. Coupling; 38. Brake assembly; 381. Brake slider; 3811. Seventh protrusion; 3812. Wedge bottom surface; 382. Brake; 3821. Limiting groove; 383. Brake reset elastic member; 39. Motor flange; 310. Drive motor;

[0083] 4. Protective cover driving module; 41. Protective cover slider; 411. Protective cover slider locking member; 42. Protective cover slider bearing; 43. Protective cover slider end cover;

[0084] 5. Transmission shaft; 51. Protective cover; 52. Twisting shell; 53. Mandrel;

[0085] 6. Micro pump head; 61. Pump head protection assembly; 62. Pump head impeller; 63. Pump head transmission assembly. DETAILED DESCRIPTION

[0086] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0087] In the following description, certain specific details are set forth for the purpose of illustrating the various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0088] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0089] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0090] like Figure 1 As shown, the present invention provides a driving control mechanism 1 applied to a left ventricular assist device 100, wherein the left ventricular assist device 100 further comprises a transmission shaft 5 and a micro pump head 6, wherein the micro pump head 6 directly enters the patient's body. The driving control mechanism 1 is connected to the micro pump head 6 via the transmission shaft 5 and is used to control the operation of the micro pump head 6.

[0091] Specifically, Figure 2 and Fig.30 As shown, the micro pump head 6 includes a pump head impeller 62 and a pump head transmission assembly 63, and the transmission shaft 5 includes a twisting shell 52 and a core shaft 53. The drive control mechanism 1 includes a twisting shell drive module 2 and a core shaft drive module 3. The proximal end of the pump head impeller 62 is connected to the twisting shell drive module 2 through the twisting shell 52, the distal end of the pump head transmission assembly 63 is fixedly connected to the distal end of the pump head impeller 62, and the proximal end of the pump head transmission assembly 63 is connected to the core shaft drive module 3 through the core shaft 53. The core shaft drive module 3 drives the core shaft 53 and the twisting shell 52 to rotate synchronously, so as to drive the distal end and the proximal end of the pump head impeller 62 to rotate together. At this time, the pump head impeller 62 as a whole rotates in a single direction with a fixed outer diameter to realize the blood pumping function, and the twisting shell 52 and the core shaft 53 are driven to rotate relative to each other through the twisting shell drive module 2, so as to drive the proximal end of the pump head impeller 62 to rotate relative to the distal end. The pump head impeller 62 is folded or unfolded, so that the outer diameter of the pump head impeller 62 can be adjusted.

[0092] like Figure 2-9 As shown, a driving control mechanism 1 of an embodiment of the present invention comprises a housing 10, a twisting shell driving module 2 and a mandrel driving module 3. The twisting shell driving module 2 is disposed in the housing 10, and the distal end of the twisting shell driving module 2 is transmission-connected to the twisting shell 52 of the transmission shaft 5. The mandrel driving module 3 is disposed in the housing 10 and arranged at the proximal end of the twisting shell driving module 2, and the distal end of the mandrel driving module 3 is transmission-connected to the mandrel 53 of the transmission shaft 5 and is detachably connected to the proximal end of the twisting shell driving module 2. When the core shaft driving module 3 is connected to the twisting shell driving module 2, the core shaft driving module 3 drives the core shaft 53 and the twisting shell 52 to rotate synchronously, and drives the distal end and the proximal end of the pump head impeller 62 to rotate together, and the pump head impeller 62 as a whole rotates in a single direction with a fixed outer diameter to realize the blood pumping function; and when the core shaft driving module 3 is separated from the twisting shell driving module 2, the twisting shell driving module 2 drives the twisting shell 52 to rotate relative to the core shaft 53, and drives the proximal end of the pump head impeller 62 to rotate relative to the distal end, and the pump head impeller 62 is folded or unfolded, so that the outer diameter of the pump head impeller 62 can be adjusted.

[0093] In this embodiment, the drive control mechanism 1 serves as a drive control module in the entire left ventricular assist device 100, and is connected to the micro pump head 6 in the left ventricular assist device 100 through a transmission shaft 5. When the distal end of the mandrel drive module 3 is connected to the proximal end of the twisting shell drive module 2, the mandrel drive module 3 drives the mandrel 53 to rotate and drives the twisting shell drive module 2 to rotate synchronously, and the twisting shell drive module 2 further drives the twisting shell 52 to rotate, thereby realizing the synchronous rotation of the twisting shell 52 and the mandrel 53, and then drives the pump head impeller 62 as a whole to rotate in a fixed manner. Outer diameter rotation (synchronous rotation here refers to rotation at the same angular velocity); when the distal end of the core shaft driving module 3 is separated from the proximal end of the twisting shell driving module 2, the twisting shell driving module 2 drives the twisting shell 52 to rotate relative to the core shaft 53 (at this time, the core shaft driving module 3 stops running and the core shaft 53 is fixed). When the twisting shell 52 rotates relative to the core shaft 53, the proximal end of the pump head impeller 62 can be driven to rotate relative to the distal end. The rotation of the proximal end of the pump head impeller 62 relative to the distal end can make the pump head impeller 62 expand or fold to change the outer diameter of the pump head impeller 62. By controlling the folding or unfolding of the pump head impeller 62 in the micro pump head 6, it is helpful to implant the micro pump head 6 in a folded state into a designated position in the human body through minimally invasive interventional surgery. Subsequently, the pump head impeller 62 can be deformed and unfolded into a spiral shape with a larger outer diameter in the human body, so that the left ventricular assist device 100 has the ability to provide the patient with sufficient auxiliary blood flow at a low rotation speed, thereby improving the blood supply efficiency and safety of the assist device. At the same time, the pump head impeller 62 with an adjustable outer diameter can also help reduce the resistance of the entire micro pump head 6 when entering and passing through the catheter, which is more conducive to the rapid and safe deployment and recovery of the assist device.

[0094] like Fig. 20 and Fig.21As shown, in an optional embodiment of the present invention, the micro pump head 6 further includes a pump head protection component 61, the transmission shaft 5 includes a protective sleeve 51, the drive control mechanism 1 further includes a protective sleeve driving module 4, the protective sleeve 51 is sleeved outside the twisting shell 52, the pump head protection component 61 coaxial cover is arranged outside the pump head impeller 62, and the proximal end of the pump head protection component 61 is transmission-connected to the protective sleeve driving module 4 through the protective sleeve 51, and the distal end of the pump head protection component 61 is fixedly connected to the distal end of the pump head transmission component 63. The protective sleeve driving module 4 is sleeved on the proximal end of the protective sleeve 51 of the transmission shaft 5 and is transmission-connected to the proximal end of the protective sleeve 51, and the protective sleeve 51 is driven to move through the protective sleeve driving module 4. Since the protective sleeve 51 is sleeved outside the twisting shell 52, when the protective sleeve driving module 4 drives the protective sleeve 51 to move on the twisting shell 52, the relative distance between the proximal end and the distal end of the pump head protection component 61 can be controlled, and then the pump head protection component 61 can be controlled to fold or unfold, so as to adjust the outer diameter of the pump head protection component 61 to match the increase or decrease in the outer diameter of the pump head impeller 62. Specifically, when the protective sleeve driving module 4 drives the protective sleeve 51 to slide toward the distal end, the relative distance between the proximal end and the distal end of the pump head protection component 61 decreases, and the outer diameter of the pump head protection component 61 increases. When the protective sleeve driving module 4 drives the protective sleeve 51 to slide toward the proximal end, the relative distance between the proximal end and the distal end of the pump head protection component 61 increases, and the outer diameter of the pump head protection component 61 decreases.

[0095] Preferably, the protective sleeve driving module 4 may include a protective sleeve slider 41, a protective sleeve slider bearing 42 and a protective sleeve slider end cover 43, wherein the protective sleeve slider 41 is sleeved on the proximal end of the protective sleeve 51 and fixedly connected to the protective sleeve 51. The proximal end of the protective sleeve slider 41 is provided with an annular groove adapted to the protective sleeve slider bearing 42, the protective sleeve slider bearing 42 is embedded in the proximal annular groove of the protective sleeve slider 41, and the outer edge of the protective sleeve slider bearing 42 is limited between the proximal annular groove of the protective sleeve slider 41 and the protective sleeve slider end cover 43. Under the condition that the proximal end face of the protective sleeve 51 is ensured to be flush with the distal end face of the annular groove provided at the proximal end of the protective sleeve slider 41, the protective sleeve slider 41 and the protective sleeve slider end cover 43 can be bonded and fixed by glue. The protective sleeve slider end cover 43 is provided at the proximal end of the protective sleeve slider 41 and fixedly connected to the protective sleeve slider 41. The protective sleeve slider 41 and the protective sleeve slider end cover 43 can be prepared by photocuring 3D printing medical hard resin.

[0096] Optionally, the protective cover driving module 4 includes at least two protective cover slider bearings 42, at least two protective cover slider bearings 42 are embedded in the proximal ring groove of the protective cover slider 41 and make the distal end face of the protective cover slider bearing 42 away from the protective cover slider end cover 43 contact with the proximal end face of the protective cover 51; and the outer edges of at least two protective cover slider bearings 42 are limited between the proximal ring groove of the protective cover slider 41 and the protective cover slider end cover 43, and the protective cover slider end cover 43 is sleeved on the proximal end of the transmission shaft 5. While ensuring that the distal end face of the protective cover slider bearing 42 contacts the distal end face of the ring groove of the protective cover slider 41 and the proximal end face of the protective cover slider bearing 42 contacts the distal end face of the protective cover slider end cover 43, the protective cover slider 41 and the protective cover slider end cover 43 can be preferably bonded and fixed using glue.

[0097] Preferably, the protective cover slider 41 is provided with a protective cover slider locking piece 411, and the protective cover slider locking piece 411 cooperates with the corresponding structure at different positions of the shell 10 to lock the protective cover slider 41 at different positions of the shell 10. Preferably, the protective cover slider locking piece 411 is a groove arranged on the surface of the protective cover slider 41, which will be further described in detail below.

[0098] Preferably, a sliding groove is opened on the shell 10 along the axial direction, and the two sides of the protective cover slider 41 are slidably arranged in the sliding groove to enable the overall protective cover slider 41 to slide along the axial direction in the shell 10, and the protective cover slider 41 is locked at different positions on the shell 10 through the protective cover slider locking piece 411.

[0099] like Figure 3 to Figure 4 As shown, in an optional embodiment of the present invention, the housing 10 includes a first housing 11 and a second housing 12 mounted in cooperation with the first housing 11 . The second housing 12 is arranged opposite to the first housing 11 and forms a cavity structure inside.

[0100] Optionally, the housing 10 further includes a distal cover 13, a second gear set cover 15, a brake assembly cover 16, and a proximal cover 14. The distal cover 13 and the proximal cover 14 are respectively disposed at the distal end and the proximal end of the housing 10, the second gear set cover 15 is disposed outside the second gear set 21, and the brake assembly cover 16 is disposed outside the brake assembly 38. Here, the first housing 11, the second housing 12, the distal cover 13, the proximal cover 14, the second gear set cover 15, and the brake assembly cover 16 can all be prepared by open mold injection molding.

[0101] Preferably, a boss is provided on the mating surface of the first shell 11 and the second shell 12; a groove is provided on the mating surface of the second shell 12 and the first shell 11 at a position corresponding to the boss, and the first shell 11 is assembled to the second shell 12 on the premise that the boss on the mating surface of the first shell 11 and the groove on the mating surface of the second shell 12 are aligned, and the two are fixed with screws; Fig.14 As shown, preferably, a first optical fiber groove 114 is provided on the mating surface of the first housing 11. Fig.15 As shown, a second optical fiber groove 124 is provided on the mating surface of the second shell 12; when the first shell 11 and the second shell 12 are arranged relative to each other to form a shell 10 with a cavity structure, the first optical fiber groove 114 and the second optical fiber groove 124 are also connected to each other to form an optical fiber groove for laying optical fibers.

[0102] Preferably, the distal end of the first shell 11 and the distal end of the second shell 12, and the proximal end of the first shell 11 and the proximal end of the second shell 12 are respectively provided with external threads that dock with each other, the distal end of the first shell 11 and the distal end of the second shell 12 are screwed and fixed with the distal cover 13, and the proximal end of the first shell 11 and the proximal end of the second shell 12 are screwed and fixed with the proximal cover 14, so as to further ensure the stability of the connection between the first shell 11 and the second shell 12. Preferably, the outer wall of the first shell 11 is provided with a first protrusion 111, a second protrusion 112, and a third protrusion 113, and the outer wall of the second shell 12 is provided with a fourth protrusion 121, a fifth protrusion 122, and a sixth protrusion 123; wherein the first protrusion 111, the second protrusion 112, the fourth protrusion 121, and the fifth protrusion 122 cooperate with the protective cover slider locking member 411 on the protective cover slider 41 in the protective cover driving module 4 to lock the protective cover slider 41 at different positions of the shell 10. The third protrusion 113 and the sixth protrusion 123 cooperate with related components in the spindle driving module 3, which will be further described in detail below.

[0103] like Figures 5 to 8 As shown, in an optional embodiment of the present invention, the twisting shell driving module 2 includes a twisting shell connecting member 28 and a twisting gear set. The twisting shell connecting member 28 is fixedly connected to the twisting shell 52, and the proximal end of the twisting shell connecting member 28 is detachably connected to the distal end of the mandrel driving module 3. The twisting gear set is arranged at the distal end of the twisting shell connecting member 28 and is used to control the rotation of the twisting shell connecting member 28 when the distal end of the mandrel driving module 3 is separated from the proximal end of the twisting shell driving module 2.

[0104] Further, the twisting gear set includes a first twisting gear shaft 26, a first twisting gear 25, a first twisting gear shaft bearing 24, a twisting shell connecting piece bearing 27 and a second gear set 21. Among them, the first twisting gear 25 is sleeved on the first twisting gear shaft 26 and is fixedly connected to the twisting shell connecting piece 28 through the first twisting gear shaft 26, the first twisting gear shaft bearing 24 is arranged at the far end of the first twisting gear shaft 26 and rotatably supports the first twisting gear shaft 26 in the housing 10, the twisting shell connecting piece bearing 27 is arranged in the middle section of the twisting shell connecting piece 28 and rotatably supports the twisting shell connecting piece 28 in the housing 10, and the second gear set 21 and the first twisting gear 25 can be separated and meshed and control the first twisting gear 25 to rotate when the second gear set 21 is meshed with the first twisting gear 25. Among them, the first twisting gear 25, the first twisting gear shaft 26 and the twisting shell connecting piece 28 can be prepared by machining aluminum alloy.

[0105] Optionally, the first twisting gear shaft 26 can be configured as a shaft body with multiple steps. During assembly, the first twisting gear 25 is assembled to the D-shaped shaft section of the first twisting gear shaft 26, and is preferably fixed using a cutting-edge machine rice; then the first twisting gear shaft bearing 24 is sleeved onto the distal end of the first twisting gear shaft 26, and then the first twisting gear shaft 26 is sleeved onto the proximal end of the twisting shell 52; the twisting shell connector bearing 27 is sleeved from the distal end of the twisting shell connector 28 to the middle section of the twisting shell connector 28, and then the twisting shell connector 28 is sleeved onto the proximal end of the twisting shell 52, and while ensuring that the proximal end face of the twisting shell connector 28 is aligned with the proximal end face of the twisting shell 52, it is preferred to use a cutting-edge machine rice to fix the twisting shell connector 28 to the twisting shell 52, and then the proximal end of the first twisting gear shaft 26 is sleeved onto the distal end of the twisting shell connector 28. Preferably, the first twisting gear shaft 26 and the twisting shell connector 28 can be fixed using a cutting-edge machine rice.

[0106] Preferably, the twisting gear set may further include a twisting shell sleeve 23 and two sets of twisting shell sleeve bearings 22. Two sets of twisting shell sleeve bearings 22 are respectively sleeved at both ends of the twisting shell sleeve 23, and the twisting shell sleeve 23 is sleeved at the proximal end of the twisting shell 52 and arranged at the proximal end of the first twisting gear shaft 26. The twisting shell sleeve 23 may be prepared by machining aluminum alloy.

[0107] like Figures 7 and 8As shown, in an optional embodiment of the present invention, the second gear set 21 includes a second twisting gear shaft 214, a second twisting gear 213, a second twisting gear shaft bearing 212, a second twisting gear limiter 211 and a second twisting gear reset elastic member 215. Among them, the second twisting gear 213 is sleeved on the second twisting gear shaft 214 and is detachably meshed with the first twisting gear 25; the second twisting gear shaft bearing 212 is arranged between the second twisting gear shaft 214 and the second twisting gear 213; the second twisting gear limiter 211 is respectively arranged at both ends of the second twisting gear shaft 214 and is fixedly connected to the second twisting gear shaft 214, one side of the second twisting gear limiter 211 is inserted into the housing 10, and the other side of the second twisting gear limiter 211 extends out of the housing 10 and supports the second twisting gear 213 outside the housing 10, and the second twisting gear reset elastic member 215 is arranged between the second twisting gear limiter 211 and the housing 10 and is used to separate the second twisting gear 213 from the first twisting gear 25. Preferably, the second twisting gear reset elastic member 215 can include two groups of second twisting gear reset springs, wherein each group of second twisting gear reset springs includes two springs.

[0108] When assembling the second gear set 21, firstly, the two second twisting gear shaft bearings 212 are respectively embedded in the two sides of the second twisting gear 213, and the outer end faces of the second twisting gear shaft bearings 212 are aligned with the end faces of the second twisting gear 213; secondly, the second twisting gear shaft 214 is inserted into the two second twisting gear shaft bearings 212 in sequence, and the center of the second twisting gear shaft 214 is coincident with the center of the second twisting gear 213; then, the small ends of the two second twisting gear limiters 211 are respectively sleeved on the two ends of the second twisting gear shaft 214 with the small ends facing inward, and the second twisting gear limiters 211 are respectively sleeved on the two ends of the second twisting gear shaft 214 while ensuring that the second Under the premise that the large end face of the twisting gear limiter 211 is aligned with the end face of the second twisting gear shaft 214, and the top faces of the two second twisting gear limiters 211 are also aligned, it is preferred to use a cutting-edge machine to fix the two second twisting gear limiters 211 and the second twisting gear shaft 214 respectively; finally, the second twisting gear reset elastic member 215 is inserted into the corresponding mounting hole of the second twisting gear limiter 211, and preferably glue is used to bond the end face of the second twisting gear reset elastic member 215 to the bottom face of the corresponding mounting hole of the second twisting gear limiter 211. The second twisting gear limiter 211, the second twisting gear 213, and the second twisting gear shaft 214 can be prepared by machining aluminum alloy.

[0109] Here, the upper ends of the two second twisting gear limiters 211 can cover the second gear set cover 15 to limit the second gear set 21 to prevent the second gear set 21 from falling off the housing 10 and avoid misoperation of the second gear set 21.

[0110] By setting the second gear set 21, when the distal end of the core shaft driving module 3 is separated from the proximal end of the twisting shell driving module 2, the second twisting gear 213 is pressed inward until the second twisting gear 213 is engaged with the first twisting gear 25. At this time, the first twisting gear 25 can be operated by turning the second twisting gear 213, and the twisting shell connecting piece 28 fixedly connected to the first twisting gear 25 is driven by the first twisting gear 25 to rotate synchronously with the first twisting gear 25, and the twisting shell 52 is driven to rotate synchronously with the first twisting gear 25, and the proximal end of the pump head impeller 62 is driven by the twisting shell 52 to rotate relative to the distal end, so that the pump head impeller 62 of the micro pump head 6 can be controlled to be unfolded or folded.

[0111] like Figures 9 and 10 As shown, in an optional embodiment of the present invention, the mandrel drive module 3 includes: a mandrel connector 35, a coupling 37, a clutch 33 and a clutch reset elastic member 34, wherein the mandrel connector 35 is sleeved on the outside of the mandrel 53 and fixedly connected to the mandrel 53; the distal end of the coupling 37 is fixedly connected to the mandrel connector 35, and the proximal end of the coupling 37 is fixedly connected to the drive motor 310; the clutch 33 is arranged at the distal end of the mandrel connector 35 and sleeved on the outside of the mandrel 53, the clutch 33 and the mandrel connector 35 are synchronously rotated and connected, and the clutch 33 and the twisting shell connector 28 are detachably connected; the clutch reset elastic member 34 is arranged between the mandrel connector 35 and the clutch 33. Preferably, the clutch reset elastic member 34 can include three clutch reset springs. Preferably, the mandrel drive module 3 also includes a mandrel connector bearing 36, which is sleeved on the proximal end of the mandrel connector 35 and rotatably supports the mandrel connector 35 in the housing 10. When assembling the mandrel connector 35, the coupling 37 and the drive motor 310, the motor flange 39 and the drive motor 310 can be fixed with screws, and then the proximal end of the mandrel connector 35 is inserted into the distal end of the coupling 37, and the rotating shaft of the drive motor 310 is inserted into the proximal end of the coupling 37, and fixed with screws. The clutch 33, the mandrel connector 35, the coupling 37 and the motor flange 39 can be prepared by machining aluminum alloy.

[0112] Alternatively, if Figures 12 to 13 As shown, the clutch 33 cooperates with the twisting shell connector 28 and the core shaft connector 35 through grooves to realize the transmission of rotational motion, wherein the clutch 33 and the core shaft connector 35 always maintain a connected state, while there are two states of connection and non-connection between the clutch 33 and the twisting shell connector 28. A groove is provided at the proximal end of the twisting shell connector 28 to facilitate the insertion of the clutch 33 and the twisting shell connector 28.

[0113] Preferably, the mandrel connector 35 is provided with a corresponding mounting hole for the clutch reset elastic member 34 to be inserted. During assembly, the proximal end of the clutch reset elastic member 34 is inserted into the corresponding mounting hole of the mandrel connector 35. Preferably, glue can be used to bond the proximal end surface of the clutch reset elastic member 34 to the bottom surface of the corresponding mounting hole of the mandrel connector 35. Since the proximal end of the clutch 33 is sleeved on the distal end of the mandrel connector 35 (a corresponding mounting hole is provided on the proximal end surface of the clutch 33, and the distal end of the clutch reset elastic member 34 is inserted into the corresponding mounting hole of the clutch 33 during assembly), the distal end of the clutch 33 is sleeved to the proximal end of the twisting shell connector 28. Under the action of the clutch reset elastic member 34, the clutch 33 and the twisting shell connector 28 can be plugged in.

[0114] like Fig.10 As shown, in an optional embodiment of the present invention, the spindle drive module 3 may further include a brake assembly 38 , which is arranged in pairs on both sides of the coupling 37 and is used to brake the coupling 37 .

[0115] In this embodiment, the two brake assemblies 38 are relatively arranged on the first shell 11 and the second shell 12, and the inner sides of the two brake assemblies 38 respectively cooperate with the outer walls opposite to the coupling 37 for braking the coupling 37; preferably, brake through holes are respectively opened on the first shell 11 and the second shell 12, and one side of the brake assembly 38 passes through the brake through hole and can translate radially at the brake through hole.

[0116] Further, such as Figure 16 to Figure 17As shown, the brake assembly 38 includes a brake slider 381, a brake 382 and a brake reset elastic member 383. The brake slider 381 is arranged outside the housing 10, the large end of the brake 382 extends out of the housing 10 and is slidably connected to the brake slider 381, and the small end of the brake 382 is inserted into the housing 10 and matched with the outer wall of the coupling 37; the brake reset elastic member 383 is arranged between the brake 382 and the housing 10 and is used to separate the brake 382 from the coupling 37; preferably, the brake reset elastic member 383 can be a pair of brake reset springs, one end of the brake reset elastic member 383 is inserted into the corresponding mounting hole of the brake 382, ​​and the other end of the brake reset elastic member 383 is inserted into the corresponding mounting hole of the housing 10. In this embodiment, a braking through hole is respectively provided on the first shell 11 and the second shell 12 of the shell 10, and the small end of the braking member 382 passes through the braking through hole and can be radially translated at the braking through hole, and the large end of the braking member 382 is arranged on the outside of the braking through hole and contacts with the braking member slider 381; a braking groove is also respectively provided on the first shell 11 and the second shell 12 of the shell 10, and the brake member slider 381 is arranged in the braking groove and can be axially translated in the braking groove; preferably, the brake member slider 381 has a wedge-shaped bottom surface 3812, and the large end of the brake member 382 is provided with a limiting groove 3821, and the wedge-shaped bottom surface 3812 and two side surfaces of the brake member slider 381 are respectively in contact with the arc-shaped top surface and two side surfaces of the limiting groove 3821.

[0117] During assembly, after the two ends of the brake member reset elastic member 383 are respectively inserted into the corresponding mounting holes of the brake member 382 and the shell 10, it is preferred to use glue to bond the end face of the brake member reset elastic member 383 to the bottom surface of the corresponding mounting hole of the brake member 382; preferably, the brake member slider 381 and the brake member 382 can be prepared by open mold injection molding.

[0118] like Figures 19 to 20 As shown, preferably, two seventh protrusions 3811 are arranged on each brake member slider 381 in the two brake assemblies 38 along the translation direction, wherein the two seventh protrusions 3811 on the brake member slider 381 in one brake assembly 38 are respectively engaged with the two third protrusions 113 on the first housing 11; and the two seventh protrusions 3811 on the brake member slider 381 in the other brake assembly 38 are respectively engaged with the two sixth protrusions 123 on the second housing 12. When the brake member slider 381 is slid and the brake member reset elastic member 383 is pressed down or released, the engagement between the seventh protrusion 3811 and the third protrusion 113 and the sixth protrusion 123 is used to realize the locking of the brake member slider 381 in two states: the brake member 382 in the brake assembly 38 locks the coupling 37 and releases the coupling 37.

[0119] Preferably, the two brake assemblies 38 are provided with brake assembly covers 16, which are respectively assembled to corresponding positions of the first shell 11 and the second shell 12 and fixed with screws to limit the brake assemblies 38 and avoid misoperation of the brake slider 381.

[0120] like Fig.10 As shown, in an optional embodiment of the present invention, the mandrel drive module 3 further includes a clutch ring 32 and a clutch fork 31. The clutch ring 32 is slidably sleeved outside the housing 10 and is provided with a clutch fork mounting hole 321 in the radial direction. The clutch fork 31 is arranged in the clutch fork mounting hole 321 and passes through the housing 10 to cooperate with the clutch 33, so that the clutch 33 can be driven to move by operating the clutch ring 32 so that the clutch 33 is separated or connected with the twisting shell connecting member 28, thereby realizing the separation or connection between the distal end of the mandrel drive module 3 and the proximal end of the twisting shell drive module 2.

[0121] Preferably, if Fig.11 As shown, the clutch ring 32 includes a first clutch ring 322 and a second clutch ring 323 mounted in cooperation with the first clutch ring 322, and the second clutch ring 323 is arranged opposite to the first clutch ring 322 to form a ring-shaped clutch ring 32. More preferably, a boss is arranged on the mating surface of the first clutch ring 322 and the second clutch ring 323; a groove is arranged on the mating surface of the second clutch ring 323 and the first clutch ring 322 at a position corresponding to the boss, and the first clutch ring 322 is assembled to the second clutch ring 323 on the premise that the boss on the mating surface of the first clutch ring 322 and the groove on the mating surface of the second clutch ring 323 are aligned, and the two are fixed by glue.

[0122] In this embodiment, the first clutch ring 322 and the second clutch ring 323 are assembled to the housing 10 from two opposite directions to form a clutch ring 32 that is sleeved on the housing 10, and then the two clutch forks 31 are assembled to the clutch ring 32, and preferably glue is used for bonding. During the assembly process, it is necessary to ensure that the clutch fork 31 can be inserted into the first housing 11 and the second housing 12, and the proximal shaft section of the clutch 33 must be between the two fingers of the clutch fork 31.

[0123] Preferably, if Figure 14 to Figure 15 As shown, the first housing 11 and the second housing 12 are respectively provided with Z-shaped grooves for limiting the movement trajectory of the clutch ring 32 and locking the clutch fork 31. Fig.24 The clutch ring 32 is rotated in the direction shown to release the locking state of the clutch fork 31 when the clutch 33 is connected to the twisting shell connecting member 28 and the spindle connecting member 35, and then Fig.25As shown in the figure, the clutch ring 32 is slid toward the proximal end, and the clutch ring 32 moves toward the proximal end with the two clutch forks 31. When the distal finger of the clutch fork 31 contacts the clutch 33, the clutch 33 is pushed toward the proximal end while the clutch reset elastic member 34 is compressed, until the clutch ring 32 can no longer move toward the proximal end. Fig.26 The clutch ring 32 can be rotated again in the direction shown, so that the clutch fork 31 enters another locked state, and the clutch 33 and the twisting shell connector 28 are in a non-connected state. Optionally, the clutch fork 31, the first clutch ring 322 and the second clutch ring 323 can all be prepared by photocuring 3D printing medical hard resin.

[0124] When the drive control mechanism 1 provided in the above embodiment of the present invention is applied to the left ventricular assist device 100, the specific drive control process is as follows:

[0125] like Fig. 22 As shown, when the auxiliary device is in the auxiliary blood supply state, the pump head impeller 62 and the pump head protection component 61 of the micro pump head 6 in the auxiliary device are in the expanded state due to their own elastic action. At this time, under the action of the second twisting gear reset elastic member 215, the clutch reset elastic member 34 and the brake reset elastic member 383, the second twisting gear 213 and the first twisting gear 25 are in a non-meshing state, the brake member 382 and the coupling 37 are in a non-contact state, the clutch 33 and the twisting shell connector 28 and the core shaft connector 35 are all in a connected state, the driving motor 310 drives the coupling 37 to rotate, and the coupling 37 drives The core shaft connecting piece 35 rotates, and the core shaft connecting piece 35 drives the core shaft 53 and the clutch 33 to rotate synchronously. The clutch 33 drives the twisting shell connecting piece 28 and drives the twisting shell 52 and the core shaft 53 to rotate synchronously through the twisting shell connecting piece 28. When the twisting shell 52 and the core shaft 53 rotate synchronously, the distal end and the proximal end of the pump head impeller 62 are driven to rotate synchronously. At this time, the pump head impeller 62 rotates as a whole with the outer diameter fixed to realize the blood pumping function; in addition, during the auxiliary blood supply process, the twisting shell connecting piece 28 will also drive the first twisting gear shaft 26 and the first twisting gear 25 to rotate, and the twisting shell 52 will drive the twisting shell sleeve 23 to rotate.

[0126] Taking the conversion of the pump head impeller 62 from the expanded state to the folded state as an example, the conversion of the left ventricular assist device 100 between the folded state and the expanded state can be achieved by the following steps:

[0127] Step 11, such as Fig.23As shown, the brake member slider 381 is slid toward the distal end, and the two brake members 382 are pushed to the locked coupling 37 state while the brake member reset elastic member 383 is compressed. At this time, the coupling 37, the spindle connector 35, and the spindle 53 are all non-rotatable; at this time, the brake member slider 381 relies on the seventh protrusion 3811 on its own surface and the third protrusion 113 corresponding to the surface of the first shell 11 and the sixth protrusion 123 corresponding to the surface of the second shell 12 to achieve the locking of the brake member slider 381 when the brake assembly 38 is in the locked coupling 37 state.

[0128] Step 12, press Fig.24 Rotate the clutch ring 32 in the direction shown to release the locking state of the clutch fork 31 when the clutch 33 is connected to the twisting shell connector 28 and the spindle connector 35, and then press Fig.25 In the direction shown, the clutch ring 32 is slid toward the proximal end, and the clutch ring 32 moves toward the proximal end with the two clutch forks 31. When the distal finger of the clutch fork 31 contacts the clutch 33, the clutch 33 is pushed toward the proximal end while the clutch complex elastic member 34 is compressed, until the clutch ring 32 can no longer move toward the proximal end. Fig.26 The clutch ring 32 is rotated again in the direction shown, so that the clutch fork 31 enters another locking state, and the clutch 33 and the twisting shell connecting member 28 are in a non-connected state.

[0129] Step 13, such as Fig. 27 As shown, push the second gear set 21 inward until the second twisting gear 213 is fully meshed with the first twisting gear 25, and then press Fig.28 The second twisting gear 213 rotates in the direction shown, the second twisting gear 213 drives the first twisting gear 25 to rotate in the opposite direction, the first twisting gear 25 drives the first twisting gear shaft 26 to rotate, the first twisting gear shaft 26 drives the twisting shell connecting piece 28 to rotate, the twisting shell connecting piece 28 drives the twisting shell 52 to rotate, and the twisting shell 52 drives the proximal end of the pump head impeller 62 in the micro pump head 6 to rotate, thereby realizing the folding of the pump head impeller 62.

[0130] Step 14: Fig.29 As shown, the protective cover slider 41 slides proximally, the protective cover slider 41 drives the protective cover 51 to move proximally, and the protective cover 51 drives the pump head protection assembly 61 in the micro pump head 6 to move proximally to the proximally, thereby realizing the folding of the pump head protection assembly 61; the protective cover slider 41 relies on the protective cover slider locking piece 411 on its own surface to cooperate with the first protrusion 111, the second protrusion 112, the fourth protrusion 121 and the fifth protrusion 122 corresponding to the surfaces of the first shell 11 and the second shell 12 to realize the locking of the protective cover slider 41 when the pump head protection assembly 61 is folded.

[0131] So far, the conversion of the micro pump head 6 in the auxiliary device from the unfolded state to the folded state is completed, and the conversion of the micro pump head 6 in the auxiliary device from the folded state to the unfolded state can be achieved by reversing the above steps.

[0132] Since the unfolded state (normal state) is the main state of the micro pump head 6 in the auxiliary device, under the action of the second twisting gear reset elastic member 215, the clutch reset elastic member 34, and the brake reset elastic member 383, the second twisting gear 213 and the first twisting gear 25 are in a non-engaged state under normal conditions, the clutch 33 and the twisting shell connecting member 28 are in a connected state under normal conditions, and the brake member 382 and the coupling 37 are in a non-contact state under normal conditions. After using and removing the left ventricular assist device 100, the micro pump head 6, the transmission shaft 5, the protective cover driving module 4, the clutch fork 31, and the clutch ring 32 can be removed and replaced to achieve the reusability of the drive control mechanism 1.

[0133] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A drive control mechanism, the drive control mechanism is applied to a left ventricular assist device, the left ventricular assist device also includes a transmission shaft, characterized in that: The drive control mechanism comprises: Housing (10); A twisting shell driving module (2), wherein the twisting shell driving module (2) is arranged in the housing (10), and the far end of the twisting shell driving module (2) is in transmission connection with the twisting shell (52) of the transmission shaft (5); and A spindle drive module (3), the spindle drive module (3) is arranged in the housing (10) and disposed at the proximal end of the twisting shell drive module (2), the distal end of the spindle drive module (3) is transmission-connected to the spindle (53) of the transmission shaft (5) and is detachably connected to the twisting shell drive module (2), wherein When the core shaft driving module (3) is connected to the twisting shell driving module (2), the core shaft driving module (3) drives the core shaft (53) and the twisting shell (52) to rotate synchronously; and when the core shaft driving module (3) is separated from the twisting shell driving module (2), the twisting shell driving module (2) drives the twisting shell (52) to rotate relative to the core shaft (53).

2. The drive control mechanism according to claim 1, characterized in that: The twisting shell driving module (2) comprises: A twisting shell connecting member (28), wherein the twisting shell connecting member (28) is fixedly connected to the twisting shell (52), and the proximal end of the twisting shell connecting member (28) is detachably connected to the distal end of the core shaft driving module (3); and A twisting gear set is arranged at the distal end of the twisting shell connecting member (28) and is used to control the rotation of the twisting shell connecting member (28) when the distal end of the core shaft driving module (3) is separated from the proximal end of the twisting shell driving module (2).

3. The drive control mechanism according to claim 2, characterized in that: The twisting gear set comprises: A first twisting gear shaft (26); A first twisting gear (25), wherein the first twisting gear (25) is sleeved on the first twisting gear shaft (26) and is fixedly connected to the twisting shell connecting member (28) via the first twisting gear shaft (26); A first twisting gear shaft bearing (24), wherein the first twisting gear shaft bearing (24) is disposed at a distal end of the first twisting gear shaft (26) and rotatably supports the first twisting gear shaft (26) in the housing (10); A twisting shell connector bearing (27), wherein the twisting shell connector bearing (27) is disposed in the middle section of the twisting shell connector (28) and rotatably supports the twisting shell connector (28) in the housing (10); and a second gear set (21), wherein the second gear set (21) and the first twisting gear (25) are detachably meshed and control the first twisting gear (25) to rotate when the second gear set (21) and the first twisting gear (25) are meshed; Optionally, the first twisting gear shaft (26) is configured as a shaft body having a multi-step shape, and the proximal end of the first twisting gear shaft (26) is sleeved and fixed to the distal end of the twisting shell connector (28); Optionally, the twisting shell driving module (2) further includes a twisting shell shaft sleeve (23) and a twisting shell shaft sleeve bearing (22), and the twisting shell shaft sleeve bearings (22) are respectively sleeved at both ends of the twisting shell shaft sleeve (23), and the twisting shell shaft sleeve (23) is sleeved on the proximal end of the twisting shell (52) and is arranged on the proximal end of the first twisting gear shaft (26).

4. The drive control mechanism according to claim 3, characterized in that: The second gear set (21) comprises: A second twisting gear shaft (214); a second twisting gear (213), wherein the second twisting gear (213) is sleeved on the second twisting gear shaft (214) and is detachably meshed with the first twisting gear (25); A second twisting gear shaft bearing (212), wherein the second twisting gear shaft bearing (212) is disposed between the second twisting gear shaft (214) and the second twisting gear (213); a second twisting gear limiting member (211), the second twisting gear limiting member (211) being respectively arranged at two ends of the second twisting gear shaft (214) and fixedly connected to the second twisting gear shaft (214), one side of the second twisting gear limiting member (211) being inserted into the housing (10), and the other side of the second twisting gear limiting member (211) being extended out of the housing (10) and supporting the second twisting gear (213) on the outside of the housing (10); and A second twisting gear reset elastic member (215), wherein the second twisting gear reset elastic member (215) is arranged between the second twisting gear limit member (211) and the housing (10) and separates the second twisting gear (213) from the first twisting gear (25).

5. The drive control mechanism according to claim 3, characterized in that: The spindle drive module (3) comprises: A core shaft connecting piece (35), wherein the core shaft connecting piece (35) is sleeved on the outside of the core shaft (53) and is fixedly connected to the core shaft (53); A coupling (37), wherein a distal end of the coupling (37) is fixedly connected to the core shaft connector (35), and a proximal end of the coupling (37) is fixedly connected to a drive motor (310); A clutch (33), wherein the clutch (33) is arranged at the distal end of the mandrel connecting member (35) and sleeved on the outside of the mandrel (53), the clutch (33) and the mandrel connecting member (35) are synchronously rotated and connected, and the clutch (33) and the twisting shell connecting member (28) are detachably connected; and A clutch reset elastic member (34), wherein the clutch reset elastic member (34) is arranged between the spindle connecting member (35) and the clutch (33); Optionally, the spindle drive module (3) further comprises a spindle connector bearing (36), wherein the spindle connector bearing (36) is sleeved on the proximal end of the spindle connector (35) and rotatably supports the spindle connector (35) in the housing (10).

6. The drive control mechanism according to claim 5, characterized in that: The spindle drive module (3) further comprises: A brake assembly (38), wherein the brake assembly (38) is arranged in pairs on both sides of the coupling (37) and is used to brake the coupling (37).

7. The drive control mechanism according to claim 6, characterized in that: The brake assembly (38) comprises: A brake member slider (381), wherein the brake member slider (381) is arranged outside the housing (10); a brake member (382), wherein a large end of the brake member (382) extends out of the housing (10) and is slidably connected to the brake member slider (381), and a small end of the brake member (382) is inserted into the housing (10) and is engaged with an outer wall of the coupling (37); and A pair of brake member reset elastic members (383), wherein the pair of brake member reset elastic members (383) are arranged between the brake member (382) and the housing (10), one end of the pair of brake member reset elastic members (383) is inserted into a corresponding mounting hole of the brake member (382), and the other end of the pair of brake member reset elastic members (383) is inserted into a corresponding mounting hole of the housing (10); Optionally, the brake member slider (381) has a wedge-shaped bottom surface (3812), and a limiting groove (3821) is provided at the large end of the brake member (382), and the wedge-shaped bottom surface (3812) and two side surfaces of the brake member slider (381) are in contact with the arc-shaped top surface and two side surfaces of the limiting groove (3821) respectively.

8. The drive control mechanism according to claim 6, characterized in that: The spindle drive module (3) further comprises: A clutch shift ring (32), the clutch shift ring (32) being slidably sleeved outside the housing (10) and having a clutch shift fork mounting hole (321) radially arranged; and A clutch fork (31), wherein the clutch fork (31) is arranged in the clutch fork mounting hole (321) and passes through the housing (10) to cooperate with the clutch (33), so that the clutch (33) can be driven to move by operating the clutch ring (32), thereby separating or connecting the clutch (33) and the twisting shell connecting member (28); Optionally, the clutch ring (32) comprises a first clutch ring (322) and a second clutch ring (323), and the first clutch ring (322) and the second clutch ring (323) are arranged opposite to each other to form the annular clutch ring (32).

9. The drive control mechanism according to claim 1, characterized in that: The drive control mechanism also includes: a protective sleeve driving module (4), the protective sleeve driving module (4) being sleeved on the proximal end of the protective sleeve (51) of the transmission shaft (5) and being drivingly connected to the proximal end of the protective sleeve (51), and driving the protective sleeve (51) to move through the protective sleeve driving module (4); Optionally, the protective cover driving module (4) comprises a protective cover slider (41), a protective cover slider bearing (42) and a protective cover slider end cover (43); the protective cover slider (41) is sleeved on the proximal end of the protective cover (51) and is fixedly connected to the protective cover (51); the protective cover slider bearing (42) is embedded in the proximal ring groove of the protective cover slider (41), and the outer edge of the protective cover slider bearing (42) is limited between the proximal ring groove of the protective cover slider (41) and the protective cover slider end cover (43); the protective cover slider end cover (43) is arranged at the proximal end of the protective cover slider (41) and is fixedly connected to the protective cover slider (41); Optionally, the protective cover driving module (4) comprises at least two protective cover slider bearings (42), the at least two protective cover slider bearings (42) being embedded in the proximal annular groove of the protective cover slider (41) and making the distal end surface of the protective cover slider bearing (42) away from the protective cover slider end cover (43) contact the proximal end surface of the protective cover (51); Optionally, the protective cover slider (41) is provided with a protective cover slider locking piece (411), and the protective cover slider locking piece (411) cooperates with corresponding structures at different positions of the shell (10) to lock the protective cover slider (41) at different positions of the shell (10).

10. The drive control mechanism according to claim 6, characterized in that: The housing (10) comprises: a first housing (11); and A second shell (12), the second shell (12) being arranged opposite to the first shell (11) and forming a cavity structure inside; Optionally, the shell (10) further includes a distal cover (13), a second gear set cover (15), a brake assembly cover (16) and a proximal cover (14), wherein the distal cover (13) and the proximal cover (14) are respectively arranged at the distal end and the proximal end of the shell (10), the second gear set cover (15) is arranged on the outside of the second gear set (21), and the brake assembly cover (16) is arranged on the outside of the brake assembly (38).

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