Drive control mechanism

Abstract

The present invention provides a drive control mechanism for use in a left ventricular assist device. The left ventricular assist device also includes a transmission shaft. The drive control mechanism includes a housing, a twisting shell drive module, and a core shaft drive module, which are sequentially arranged in the housing. The distal end of the twisting shell drive module is transmission-connected to the twisting shell of the transmission shaft, and the distal end of the core shaft drive module is transmission-connected to the core shaft of the transmission shaft and is detachably connected to the proximal end of the twisting shell drive module. When the distal end of the core shaft drive module is connected to the proximal end of the twisting shell drive module, the core shaft drive module drives the core shaft and the twisting shell to rotate synchronously. When the distal end of the core shaft drive module is separated from the proximal end of the twisting shell drive module, the twisting shell drive module drives the twisting shell to rotate relative to the core shaft. The drive control mechanism provided by the present invention can achieve synchronous or relative rotation of the core shaft and the twisting shell, thereby achieving folding, expansion, and rotational movement of the pump head impeller in the left ventricular assist device, thereby improving the efficiency and safety of the left ventricular assist device.

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 (LVAD) is a percutaneous mechanical circulatory assist system that uses a mechanical micropump to provide auxiliary blood flow during and after high-risk cardiovascular interventional surgery for patients. It can partially or completely assist the function of the left ventricle, helping the heart deliver oxygenated blood to the entire body. Existing LVADs primarily use a drive mechanism to control the pump head impeller to rotate in a single direction with a fixed outer diameter. This produces an auxiliary flow rate that is difficult to achieve as expected. Furthermore, the high-speed rotation of the pump head impeller in a single direction inevitably causes excessive shear stress within 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 drive control mechanism to improve the efficiency and safety of left ventricular assist device and reduce harm to the human body.

[0005] To solve the above technical problems, the present invention provides a drive control mechanism, which is applied to a left ventricular assist device. The left ventricular assist device also includes a transmission shaft. 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 distal end of the twisting shell driving module is in transmission connection with the twisting shell of the transmission shaft; and

[0008] A core shaft drive module is provided in the housing and arranged at the proximal end of the twisting shell drive module, and the distal end of the core shaft drive module is connected to the core shaft 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 includes:

[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 core shaft driving module; and

[0012] A twisting gear set is provided at the distal end of the twisting shell connector and is used to control the rotation of the twisting shell connector 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] First twisting gear shaft;

[0015] a first twisting gear, wherein the first twisting gear is sleeved on the first twisting gear shaft and fixedly connected to the twisting housing connector 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 within the housing;

[0017] a twisting shell connector bearing, the twisting shell connector bearing being disposed in a middle section of the twisting shell connector and rotatably supporting the twisting shell connector within the housing; and

[0018] a second gear set, the second gear set being detachably meshed with the first twisting gear and controlling 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 multi-stepped shaft, and the proximal end of the first twisting gear shaft is sleeved and fixed to the distal end of the twisting housing connector;

[0020] Optionally, the twisting shell drive module also includes a twisting shell sleeve and a twisting shell sleeve bearing, the twisting shell sleeve bearings are respectively sleeved on 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 includes:

[0022] Second twisting gear shaft;

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

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

[0025] a second twisting gear limiting member, the second twisting gear limiting member being respectively provided at both ends of the second twisting gear shaft and fixedly connected to the second twisting gear shaft, one side of the second twisting gear limiting member being inserted into the housing, and the other side of the second twisting gear limiting member being extended out of the housing and supporting 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 limiting member and the housing and separates the second twisting gear from the first twisting gear.

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

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

[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 being arranged at the distal end of the core shaft connector and sleeved on the outside of the core shaft, the clutch being synchronously rotated with the core shaft connector, and the clutch being detachably connected to the twisting shell connector; and

[0031] A clutch resetting elastic member, the clutch resetting elastic member being arranged between the core shaft connecting member and the clutch;

[0032] Optionally, the spindle drive module further includes a spindle connector bearing, which is sleeved on 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 assemblies 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, the brake slider being 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 engaged with the outer wall of the coupling; and

[0038] a pair of brake member reset elastic members, the pair of brake member reset elastic members being arranged between the brake member and the housing, one end of the pair of brake member reset elastic members being inserted into the corresponding mounting holes of the brake member, and the other end of the pair of brake member reset elastic members being inserted into the corresponding mounting holes 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 radially provided therein; and

[0042] a clutch fork, the clutch fork being disposed 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 housing connector;

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

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

[0045] a protective cover driving module, the protective cover driving module being sleeved on the proximal end of the protective cover of the transmission shaft and being in transmission connection with the proximal end of the protective cover, and driving the protective cover to move through 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 on 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 cover slider;

[0047] Optionally, the protective cover driving module includes at least two protective cover slider bearings, and 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 protective cover slider end cover 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 being arranged opposite to the first shell and forming a cavity structure therein;

[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-mentioned solution of the present invention includes: a housing, a twisting housing drive module, and a core shaft drive module. The twisting housing drive module is disposed within the housing, and the distal end of the twisting housing drive module is in transmission connection with the twisting housing of the transmission shaft. The core shaft drive module is disposed within the housing and arranged proximal to the twisting housing drive module. The distal end of the core shaft drive module is in transmission connection with the core shaft of the transmission shaft and is detachably connected to the twisting housing drive module. When the core shaft drive module is connected to the twisting housing drive module, the core shaft drive module drives the core shaft and the twisting housing to rotate synchronously; and when the core shaft drive module is disconnected from the twisting housing drive module, the twisting housing drive module drives the twisting housing to rotate relative to the core shaft. By connecting or disconnecting the core shaft drive module from the twisting housing drive module, the core shaft of the transmission shaft and the twisting housing of the left ventricular assist device can rotate synchronously or relative to each other, thereby enabling the folding or rotation of the pump head impeller fixedly connected to both the core shaft and the twisting housing, thereby improving the efficiency and safety of the assist 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 1 is a schematic diagram of the three-dimensional structure of a twisting shell driving module provided in 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 in an optional embodiment of the present invention;

[0063] Figure 9 1 is a schematic diagram of the three-dimensional structure of a spindle drive module provided in an optional embodiment of the present invention;

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

[0065] Figure 11 is an exploded view of a clutch ring provided in an optional embodiment of the present invention;

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

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

[0068] Figure 14 1 is a schematic diagram of the assembly of a first housing and a clutch fork provided in an optional embodiment of the present invention;

[0069] Figure 15 1 is a schematic diagram of the assembly of the second housing and the clutch fork provided in an optional embodiment of the present invention;

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

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

[0072] Figure 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] Figure 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] Figure 20 is a schematic diagram of the three-dimensional structure of a protective cover driving module provided in an optional embodiment of the present invention;

[0075] Figure 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 expanded state to a folded state;

[0077] Figure 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 slot; 12. Second housing; 121. Fourth protrusion; 122. Fifth protrusion; 123. Sixth protrusion; 124. Second optical fiber slot; 13. Distal cover; 14. Proximal cover; 15. Second gear assembly cover; 16. Brake assembly cover;

[0081] 2. Twisting shell drive 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 sleeve bearing; 23. Twisting shell 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 return elastic member; 35. Spindle connector; 36. Spindle connector bearing; 37. Coupling; 38. Brake assembly; 381. Brake slider; 3811. Seventh protrusion; 3812. Wedge-shaped bottom surface; 382. Brake; 3821. Limiting groove; 383. Brake return elastic member; 39. Motor flange; 310. Drive motor;

[0083] 4. Protective cover drive 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] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although 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. Rather, 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, for the purpose of illustrating the various disclosed embodiments, certain specific details are set forth in order 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 this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0088] Reference throughout this specification to "one embodiment" or "an embodiment" means 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 this 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 words such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" 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 drive control mechanism 1 for a left ventricular assist device 100. The left ventricular assist device 100 also includes a drive shaft 5 and a micropump head 6. The micropump head 6 is directly inserted into the patient's body. The drive control mechanism 1 is connected to the micropump head 6 via the drive shaft 5 and is used to control the operation of the micropump head 6.

[0091] Specifically, if Figure 2 and Figure 30 As shown, the micro pump head 6 includes a pump head impeller 62 and a pump head transmission assembly 63. 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 transmission-connected to the twisting shell drive module 2 via 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. The proximal end of the pump head transmission assembly 63 is transmission-connected to the core shaft drive module 3 via the core shaft 53. The core shaft drive module 3 drives the core shaft 53 and the twisting shell 52 to rotate synchronously, driving the distal and proximal ends 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 achieve the blood pumping function. The twisting shell drive module 2 drives the twisting shell 52 and the core shaft 53 to rotate relative to each other, driving the proximal end of the pump head impeller 62 to rotate relative to the distal end. The pump head impeller 62 can be folded or unfolded, thereby adjusting the outer diameter of the pump head impeller 62.

[0092] like Figure 2-9 As shown, a drive control mechanism 1 according to one embodiment of the present invention includes a housing 10, a twisting housing drive module 2, and a core shaft drive module 3. The twisting housing drive module 2 is disposed within the housing 10, with the distal end of the twisting housing drive module 2 being in driving connection with the twisting housing 52 of the transmission shaft 5. The core shaft drive module 3 is disposed within the housing 10 and disposed proximal to the twisting housing drive module 2. The distal end of the core shaft drive module 3 is in driving connection with the core shaft 53 of the transmission shaft 5 and is detachably connected to the proximal end of the twisting housing drive module 2. When the core shaft drive module 3 is connected to the twisting shell drive module 2, the core shaft drive 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 drive module 3 is separated from the twisting shell drive module 2, the twisting shell drive 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 the 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 the transmission shaft 5. When the distal end of the core shaft drive module 3 is connected to the proximal end of the twisting shell drive module 2, the core shaft drive module 3 drives the core shaft 53 to rotate and drives the twisting shell drive module 2 to rotate synchronously. 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 core shaft 53, and then drives the pump head impeller 62 as a whole to a fixed 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 speed, thereby improving the blood supply efficiency and safety of use of the assist device; at the same time, the pump head impeller 62 with 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 Figure 20 and Figure 21As shown, in an optional embodiment of the present invention, the micro pump head 6 further includes a pump head protection assembly 61, the transmission shaft 5 includes a protective sleeve 51, and the drive control mechanism 1 further includes a protective sleeve drive module 4. The protective sleeve 51 is sleeved on the outside of the twisting shell 52, and the pump head protection assembly 61 is coaxially covered outside the pump head impeller 62. The proximal end of the pump head protection assembly 61 is transmission-connected to the protective sleeve drive module 4 through the protective sleeve 51, and the distal end of the pump head protection assembly 61 is fixedly connected to the distal end of the pump head transmission assembly 63. The protective sleeve drive module 4 is sleeved on the proximal end of the protective sleeve 51 of the transmission shaft 5 and transmission-connected to the proximal end of the protective sleeve 51, and the protective sleeve 51 is driven to move by the protective sleeve drive 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 protective assembly 61 can be controlled, thereby controlling the folding or unfolding of the pump head protective assembly 61 to adjust the outer diameter of the pump head protective assembly 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 protective assembly 61 decreases, and the outer diameter of the pump head protective assembly 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 protective assembly 61 increases, and the outer diameter of the pump head protective assembly 61 decreases.

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

[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 entire 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 Figures 3 and 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 conjunction with the first housing 11 . The second housing 12 is arranged opposite to the first housing 11 and forms a cavity structure therein.

[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 disposed at the distal and proximal ends of the housing 10, respectively. 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 manufactured 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; Figure 14 As shown, preferably, a first optical fiber groove 114 is provided on the mating surface of the first housing 11. Figure 15 As shown, a second optical fiber groove 124 is opened 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 also dock with each other to form an optical fiber groove for laying optical fibers.

[0102] Preferably, the distal ends of the first and second housings 11 and 12, as well as the proximal ends of the first and second housings 12, are respectively provided with external threads that mate with each other. The distal ends of the first and second housings 11 and 12 are screwed together and fixed to the distal cover 13, while the proximal ends of the first and second housings 11 and 12 are screwed together and fixed to the proximal cover 14, to further ensure the stability of the connection between the first and second housings 11 and 12. Preferably, a first protrusion 111, a second protrusion 112, and a third protrusion 113 are provided on the outer wall of the first housing 11, and a fourth protrusion 121, a fifth protrusion 122, and a sixth protrusion 123 are provided on the outer wall of the second housing 12. 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 of the protective cover driving module 4 to lock the protective cover slider 41 in different positions of the housing 10. The third protrusion 113 and the sixth protrusion 123 cooperate with relevant components in the spindle driving module 3, which will be described in further detail below.

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

[0104] Furthermore, 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 housing connector bearing 27, and a second gear set 21. The first twisting gear 25 is sleeved on the first twisting gear shaft 26 and fixedly connected to the twisting housing connector 28 via the first twisting gear shaft 26. The first twisting gear shaft bearing 24 is disposed at the distal end of the first twisting gear shaft 26 and rotatably supports the first twisting gear shaft 26 within the housing 10. The twisting housing connector bearing 27 is disposed in the middle of the twisting housing connector 28 and rotatably supports the twisting housing connector 28 within the housing 10. The second gear set 21 is detachably meshed with the first twisting gear 25 and controls the rotation of the first twisting gear 25 when the second gear set 21 is engaged with the first twisting gear 25. The first twisting gear 25, the first twisting gear shaft 26, and the twisting housing connector 28 can be manufactured by machining aluminum alloy.

[0105] Optionally, the first twisting gear shaft 26 can be configured to have a multi-step stepped shaft body. 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 with a cutting-edge machine rice; then the first twisting gear shaft bearing 24 is put onto the distal end of the first twisting gear shaft 26, and then the first twisting gear shaft 26 is put onto the proximal end of the twisting shell 52; the twisting shell connector bearing 27 is put 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 put 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 preferably used 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 put 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 with a cutting-edge machine rice.

[0106] Preferably, the twisting gear assembly may further include a twisting housing sleeve 23 and two sets of twisting housing sleeve bearings 22. The twisting housing sleeve 23 is sleeved with two sets of twisting housing sleeve bearings 22 at each end. The twisting housing sleeve 23 is sleeved proximal to the twisting housing 52 and disposed proximal to the first twisting gear shaft 26. The twisting housing sleeve 23 may be manufactured 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. The second twisting gear 213 is sleeved on the second twisting gear shaft 214 and is detachably engaged with the first twisting gear 25. The second twisting gear shaft bearing 212 is disposed between the second twisting gear shaft 214 and the second twisting gear 213. Second twisting gear stoppers 211 are disposed at both ends of the second twisting gear shaft 214 and are fixedly connected to the second twisting gear shaft 214. One side of the second twisting gear stopper 211 is inserted into the housing 10, and the other side of the second twisting gear stopper 211 extends outside the housing 10 and supports the second twisting gear 213 outside the housing 10. A second twisting gear reset elastic member 215 is disposed between the second twisting gear stopper 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 may include two sets of second twisting gear reset springs, wherein each set of second twisting gear reset springs includes two springs.

[0108] When assembling the second gear set 21, first, embed the two second twisting gear shaft bearings 212 on both sides of the second twisting gear 213 respectively, and align the outer end faces of the second twisting gear shaft bearings 212 with the end faces of the second twisting gear 213; secondly, insert the second twisting gear shaft 214 into the two second twisting gear shaft bearings 212 in sequence, and make the center of the second twisting gear shaft 214 coincide with the center of the second twisting gear 213; then, put the small ends of the two second twisting gear limiters 211 inwardly onto the two ends of the second twisting gear shaft 214, and ensure that the second After 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, the two second twisting gear limiters 211 and the second twisting gear shaft 214 can be fixed using a cutting-edge machine. Finally, the second twisting gear reset elastic member 215 is inserted into the corresponding mounting hole of the second twisting gear limiter 211, and the end face of the second twisting gear reset elastic member 215 is preferably bonded to the bottom face of the corresponding mounting hole of the second twisting gear limiter 211 using glue. The second twisting gear limiter 211, the second twisting gear 213, and the second twisting gear shaft 214 can be made 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 and prevent the second gear set 21 from falling off from the housing 10, while avoiding 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 toggling the second twisting gear 213, and the twisting shell connecting member 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, thereby controlling the pump head impeller 62 of the micro pump head 6 to be expanded or folded.

[0111] like Figures 9 and 10 As shown, in an optional embodiment of the present invention, the spindle drive module 3 includes: a spindle connector 35, a coupling 37, a clutch 33, and a clutch return spring 34. The spindle connector 35 is sleeved on the exterior of the spindle 53 and fixedly connected to the spindle 53; the distal end of the coupling 37 is fixedly connected to the spindle connector 35, and the proximal end of the coupling 37 is fixedly connected to the drive motor 310; the clutch 33 is disposed at the distal end of the spindle connector 35 and sleeved on the exterior of the spindle 53. The clutch 33 and the spindle connector 35 are synchronously rotatably connected, and the clutch 33 is detachably connected to the twisting shell connector 28; and the clutch return spring 34 is disposed between the spindle connector 35 and the clutch 33. Preferably, the clutch return spring 34 may include three clutch return springs. Preferably, the spindle drive module 3 also includes a spindle connector bearing 36, which sleeves on the proximal end of the spindle connector 35 and rotatably supports the spindle connector 35 within the housing 10. When assembling the spindle connector 35, coupling 37, and drive motor 310, screws are used to secure the motor flange 39 to the drive motor 310. The proximal end of the spindle connector 35 is then 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 secured with screws. The clutch 33, spindle connector 35, coupling 37, and motor flange 39 can be fabricated by machining aluminum alloy.

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

[0113] Preferably, the core shaft connector 35 is provided with a corresponding mounting hole for inserting the clutch reset elastic member 34. During assembly, the proximal end of the clutch reset elastic member 34 is inserted into the corresponding mounting hole of the core shaft 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 core shaft connector 35. Since the proximal end of the clutch 33 is sleeved on the distal end of the core shaft 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 onto 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 Figure 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 to brake the coupling 37; preferably, a brake through hole is 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 Figures 16 and 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 disposed outside the housing 10, with the large end of the brake 382 extending outside the housing 10 and slidably connected to the brake slider 381, and the small end of the brake 382 inserted into the housing 10 and engaged with the outer wall of the coupling 37. The brake reset elastic member 383 is disposed 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, with one end of the brake reset elastic member 383 inserted into the corresponding mounting hole of the brake 382 and the other end of the brake reset elastic member 383 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 brake member 382 passes through the braking through hole and can be radially translated at the braking through hole, and the large end of the brake member 382 is arranged on the outside of the braking through hole and contacts the brake 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 the two side surfaces of the brake member slider 381 are respectively in contact with the arc-shaped top surface and the two side surfaces of the limiting groove 3821.

[0117] During assembly, after inserting the two ends of the brake member reset elastic member 383 into the corresponding mounting holes of the brake member 382 and the shell 10 respectively, 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 both be prepared by open mold injection molding.

[0118] like Figures 19 to 20 As shown, preferably, each brake slider 381 in the two brake assemblies 38 is provided with two seventh protrusions 3811 along the translation direction. The two seventh protrusions 3811 on the brake slider 381 in one brake assembly 38 respectively engage with the two third protrusions 113 on the first housing 11; and the two seventh protrusions 3811 on the brake slider 381 in the other brake assembly 38 respectively engage with the two sixth protrusions 123 on the second housing 12. When the brake slider 381 is slid and the brake resetting elastic member 383 is pressed downward or released, the engagement between the seventh protrusions 3811 and the third and sixth protrusions 113, 123 is used to lock the brake slider 381 in both states: the brake 382 in the brake assembly 38 is locked with the coupling 37, and the coupling 37 is released.

[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 Figure 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 mounted on the outside of the housing 10 and is provided with a clutch fork mounting hole 321 in the radial direction. The clutch fork 31 is disposed in the clutch fork mounting hole 321 and passes through the housing 10 to cooperate with the clutch 33, so that by operating the clutch ring 32, the clutch 33 can be driven to move, thereby separating or connecting the clutch 33 with the twisting shell connector 28, thereby achieving 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 Figure 11 As shown, the clutch ring 32 includes a first clutch ring 322 and a second clutch ring 323 mounted in conjunction with the first clutch ring 322. The second clutch ring 323 and the first clutch ring 322 are arranged opposite each other to form the annular clutch ring 32. More preferably, a boss is provided on the mating surfaces of the first clutch ring 322 and the second clutch ring 323; a groove is provided on the mating surfaces of the second clutch ring 323 and the first clutch ring 322 at a position corresponding to the boss. The first clutch ring 322 is assembled to the second clutch ring 323 with the boss on the mating surface of the first clutch ring 322 aligned with the groove on the mating surface of the second clutch ring 323, and the two are fixed using 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. Then, the two clutch forks 31 are assembled to the clutch ring 32 and are preferably bonded using glue. 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 Figures 14 and 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. Figure 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 core shaft connector 35, and then Figure 25As 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, it compresses the clutch reset elastic member 34 while pushing the clutch 33 toward the proximal end until the clutch ring 32 can no longer move toward the proximal end. Figure 26 The clutch ring 32 is rotated again in the direction shown, causing the clutch fork 31 to enter another locked state. At this time, the clutch 33 and the twisting shell connector 28 are no longer connected. Optionally, the clutch fork 31, the first clutch ring 322, and the second clutch ring 323 can all be prepared by light-curing 3D printing of medical hard resin.

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

[0125] like Figure 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 connector 35 rotates, and the core shaft connector 35 drives the core shaft 53 and the clutch 33 to rotate synchronously. The clutch 33 drives the twisting shell connector 28 and drives the twisting shell 52 and the core shaft 53 to rotate synchronously through the twisting shell connector 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 while the outer diameter is fixed to realize the blood pumping function; in addition, during the auxiliary blood supply process, the twisting shell connector 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 Figure 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 compressing the brake member reset elastic member 383. At this time, the coupling 37, the core shaft connector 35, and the core shaft 53 are all unable to rotate; 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 Figure 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 core shaft connector 35, and then press Figure 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, it compresses the clutch elastic member 34 while pushing the clutch 33 toward the proximal end until the clutch ring 32 can no longer move toward the proximal end. Figure 26 The clutch ring 32 is rotated again in the direction shown, so that the clutch fork 31 enters another locked state, and the clutch 33 and the twisting shell connecting member 28 are in a non-connected state.

[0129] Step 13, such as Figure 27 As shown, push the second gear set 21 inward until the second twisting gear 213 is fully engaged with the first twisting gear 25, and then press Figure 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 connector 28 to rotate, the twisting shell connector 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, such as Figure 29 As shown, the protective cover slider 41 slides toward the proximal end, the protective cover slider 41 drives the protective cover 51 to move toward the proximal end, and the protective cover 51 drives the pump head protection assembly 61 in the micro pump head 6 to move proximally toward the proximal end, 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 expanded 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 expanded state can be achieved by reversing the above steps.

[0132] Since the deployed state (normal state) is the primary state of the micropump head 6 in the assist 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 normally in a non-meshed state, the clutch 33 and the twisting housing connector 28 are normally connected, and the brake 382 and the coupling 37 are normally in a non-contact state. After use and removal of the left ventricular assist device 100, the micropump head 6, transmission shaft 5, protective sleeve drive module 4, clutch fork 31, and clutch ring 32 can be removed and replaced to achieve 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 within the scope of protection of the present invention.

Claims

1. A drive control mechanism, wherein the drive control mechanism is applied to a left ventricular assist device, wherein the left ventricular assist device further comprises a transmission shaft, characterized in that: The drive control mechanism includes: housing (10); a twisting shell driving module (2), the twisting shell driving module (2) being arranged in the housing (10), and the twisting shell driving module (2) being in transmission connection with the twisting shell (52) of the transmission shaft (5); and A core shaft drive module (3), the core shaft drive module (3) is arranged in the housing (10) and disposed at the proximal end of the twisting shell drive module (2), the core shaft drive module (3) is transmission-connected to the core shaft (53) of the transmission shaft (5) and is detachably connected to the twisting shell drive module (2), wherein When the core shaft drive module (3) is connected to the twisting shell drive module (2), the core shaft drive module (3) drives the core shaft (53) and the twisting shell (52) to rotate synchronously; and when the core shaft drive module (3) is separated from the twisting shell drive module (2), the twisting shell drive module (2) drives the twisting shell (52) to rotate relative to the core shaft (53); wherein The twisting shell driving module (2) comprises: a twisting shell connector (28), wherein the twisting shell connector (28) is fixedly connected to the twisting shell (52), and the proximal end of the twisting shell connector (28) is detachably connected to the distal end of the core shaft drive module (3); and a twisting gear set, the twisting gear set being arranged at the distal end of the twisting shell connecting member (28) and being 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); and The spindle drive module (3) comprises: A core shaft connecting piece (35), the core shaft connecting piece (35) is sleeved on the outside of the core shaft (53) and 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 the drive motor (310); A clutch (33), the clutch (33) being arranged at the distal end of the core shaft connector (35) and sleeved on the outside of the core shaft (53), the clutch (33) being synchronously rotatably connected to the core shaft connector (35), and the clutch (33) being detachably connected to the twisting shell connector (28); and A clutch reset elastic member (34), wherein the clutch reset elastic member (34) is arranged between the core shaft connecting member (35) and the clutch (33).

2. The drive control mechanism according to claim 1, 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 fixedly connected to the twisting shell connecting member (28) via the first twisting gear shaft (26); a first twisting gear shaft bearing (24), the first twisting gear shaft bearing (24) being arranged at the distal end of the first twisting gear shaft (26) and rotatably supporting the first twisting gear shaft (26) within 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) within the housing (10); and A second gear set (21) is configured to be detachably engaged with the first twisting gear (25) and to control the rotation of the first twisting gear (25) when the second gear set (21) is engaged with the first twisting gear (25).

3. The drive control mechanism according to claim 2, characterized in that: 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 on and fixed to the distal end of the twisting shell connector (28).

4. The drive control mechanism according to claim 3, characterized in that: The twisting shell drive module (2) further comprises a twisting shell shaft sleeve (23) and a twisting shell shaft sleeve bearing (22), wherein the twisting shell shaft sleeve bearings (22) are respectively sleeved on 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 distal end of the first twisting gear shaft (26).

5. The drive control mechanism according to claim 2, characterized in that: The second gear set (21) comprises: A second twisting gear shaft (214); a second twisting gear (213), the second twisting gear (213) being sleeved on the second twisting gear shaft (214) and being detachably meshed with the first twisting gear (25); a second twisting gear shaft bearing (212), the second twisting gear shaft bearing (212) being arranged between the second twisting gear shaft (214) and the second twisting gear (213); a second twisting gear limiting member (211), wherein the second twisting gear limiting member (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 limiting member (211) extends into the housing (10), and the other side of the second twisting gear limiting member (211) extends out of the housing (10) and supports the second twisting gear (213) on the outside of the housing (10); and A second twisting gear reset elastic member (215) is provided 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).

6. The drive control mechanism according to claim 2, characterized in that: 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).

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

8. The drive control mechanism according to claim 7, characterized in that: The brake assembly (38) comprises: A brake member slider (381), the brake member slider (381) being arranged outside the housing (10); a brake member (382), wherein the large end of the brake member (382) extends out of the housing (10) and is slidably connected to the brake member slider (381), and the small end of the brake member (382) is inserted into the housing (10) and engages with the 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 the 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 the corresponding mounting hole of the housing (10).

9. The drive control mechanism according to claim 8, characterized in that: 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). 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.

10. The drive control mechanism according to claim 7, characterized in that: The spindle drive module (3) further includes: A clutch shift ring (32), wherein the clutch shift ring (32) is slidably sleeved outside the housing (10) and is provided with a clutch shift fork mounting hole (321) in a radial direction; and A clutch fork (31) is disposed 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 connector (28).

11. The drive control mechanism according to claim 10, characterized in that: The clutch ring (32) comprises a first clutch ring (322) and a second clutch ring (323), wherein the first clutch ring (322) and the second clutch ring (323) are arranged relative to each other to form the annular clutch ring (32).

12. The drive control mechanism according to claim 1, characterized in that: The drive control mechanism further includes: A protective sleeve driving module (4) is sleeved on the proximal end of the protective sleeve (51) of the transmission shaft (5) and is in transmission connection with the proximal end of the protective sleeve (51), and drives the protective sleeve (51) to move via the protective sleeve driving module (4).

13. The drive control mechanism according to claim 12, characterized in that: 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 fixedly connected to the protective cover (51); the protective cover slider bearing (42) is embedded in the proximal annular groove of the protective cover slider (41), and the outer edge of the protective cover slider bearing (42) is limited between the proximal annular 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 fixedly connected to the protective cover slider (41).

14. The drive control mechanism according to claim 13, characterized in that: The protective sleeve drive module (4) comprises at least two protective sleeve slider bearings (42), and the at least two protective sleeve slider bearings (42) are embedded in the proximal annular groove of the protective sleeve slider (41) so that the distal end surface of the protective sleeve slider bearing (42) away from the protective sleeve slider end cover (43) contacts the proximal end surface of the protective sleeve (51).

15. The drive control mechanism according to claim 14, characterized in that: 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 housing (10) to lock the protective cover slider (41) at different positions of the housing (10).

16. The drive control mechanism according to claim 7, characterized in that: The housing (10) comprises: a first housing (11); and A second shell (12), the second shell (12) is arranged opposite to the first shell (11) and forms a cavity structure inside.

17. The drive control mechanism according to claim 16, characterized in that: 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), wherein the distal cover (13) and the proximal cover (14) are respectively arranged at the distal end and the proximal end of the housing (10), the second gear set cover (15) is arranged outside the second gear set (21), and the brake assembly cover (16) is arranged outside the brake assembly (38).

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