A new type of blood pump hand drive device

Abstract

The application provides a novel blood pump hand-cranking driving device, and mainly solves the problem of large noise generated in the long-term operation of the existing hand-cranking pump. The hand-cranking driving device has the characteristics of small noise and smooth input flow by optimizing the planetary gear structure, separating the planetary gear from the lower planetary carrier, and through separate limiting shaft and cavity sealing measures. In another embodiment of the application, the connection of the buzzer can alarm the over-speed operation of the hand-cranking, thereby improving the use safety of the product.

Description

Technical Field

[0001] This invention belongs to the field of extracorporeal blood circulation pump drive technology, specifically relating to a novel hand-cranked blood pump drive device. Background Technology

[0002] Traditional blood pump drive devices use an electric motor to drive the pump and generate high-speed power. Electric drive typically uses batteries or other equipment to provide direct power to the pump.

[0003] Therefore, a new type of hand-cranked drive device for blood pumps is needed. Summary of the Invention

[0004] To address this issue, embodiments of the present invention provide a novel hand-cranked blood pump drive device, solving the technical problem of providing highly efficient manual power for extended periods when existing electrically driven devices are out of power or battery-powered equipment is unavailable, or in outdoor conditions. Furthermore, embodiments of the present invention provide a hand-cranked blood pump drive device for providing extracorporeal blood circulation power, effectively solving the problems of small size, low noise, and high transmission efficiency.

[0005] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0006] This application provides a novel hand-cranked blood pump drive device, which includes: a hand-cranked pump body, a pump drive fixed base assembly, a rotor disk assembly, a hand-cranking assembly, a first torque transmission assembly, a second torque transmission assembly, and a torque transmission reversing assembly;

[0007] The pump drive mounting bracket assembly is fitted onto the hand-cranked pump body to form a receiving cavity. The first torque transmission assembly and the second torque transmission assembly are arranged perpendicularly to each other in the receiving cavity and are connected by the torque transmission reversing assembly. The rotor disk assembly is assembled to the top of the second torque transmission assembly and is located below the pump drive mounting bracket assembly. The hand-cranked assembly extends into the hand-cranked pump body from the side and is connected to the outer end of the first torque transmission assembly.

[0008] The first torque transmission assembly includes: a crank handle adapter shaft, a one-way needle roller bearing, and a crank handle shaft; the crank handle adapter shaft is externally connected to the hand crank assembly, the crank handle adapter shaft is internally fitted onto the first end of the crank handle shaft, and the one-way needle roller bearing is assembled in the gap between the first end of the crank handle shaft and the crank handle adapter shaft;

[0009] The second torque transmission assembly includes: a Z6 gear shaft, a planetary transmission assembly, and a Z1 gear shaft; the upper end of the Z6 gear shaft is connected to the lower end of the planetary transmission assembly, the lower end of the Z1 gear shaft meshes with the upper end of the planetary transmission assembly, the upper end of the Z1 gear shaft is inserted into the bottom hole of the rotor disk assembly, and the lower end surface of the Z1 gear shaft is an arc-shaped surface.

[0010] Further, the planetary transmission assembly includes: a Z2 gear, a second planetary carrier assembly, a Z3 gear, a Z5 gear, a first planetary carrier assembly, an input shaft end cover, and an output shaft end cover; the second planetary carrier assembly and the first planetary carrier assembly are disposed in the gear tooth hole in the middle of the Z3 gear, and the Z2 gear and the Z5 gear are respectively mounted on the second planetary carrier assembly and the first planetary carrier assembly. Both the second planetary carrier assembly and the first planetary carrier assembly are provided with limit shafts, which axially limit the Z2 gear and the Z5 gear through upper limit ends. Both the Z2 gear and the Z5 gear mesh with the internal teeth of the Z3 gear, and the bottom gear of the second planetary carrier assembly is inserted into the Z5 gear. The Z1 gear is inserted into the middle of the Z2 gear and meshes with the Z5 gear. The lower end face of the bottom gear of the second planetary carrier assembly is an arc surface. The lower end of the Z1 gear shaft is inserted into the middle of the Z2 gear and meshes with the Z2 gear. The upper end of the Z6 gear shaft is inserted into the middle of the first planetary carrier assembly. The output shaft end cover is installed on the opening of the hand-cranked pump body. The pump drive fixing seat assembly is covered on the top of the hand-cranked pump body and the output shaft end cover. The upper end of the Z1 gear shaft passes through the output shaft end cover and is inserted into the bottom hole of the rotor disk assembly. The Z3 gear is installed between the input shaft end cover and the output shaft end cover. The upper end of the Z6 gear shaft passes through the input shaft end cover and is inserted into the middle of the first planetary carrier assembly.

[0011] Furthermore, the pump drive mounting bracket is installed on the top of the hand-cranked pump body and the output shaft end cover, and the bottom of the pump drive mounting bracket has a built-in sealing ring installed in the first sealing groove on the periphery of the output shaft end cover. A first sealing cavity is formed between the pump drive mounting bracket and the output shaft end cover, and the rotor disk assembly is located in the first sealing cavity.

[0012] Furthermore, the outer periphery of the output shaft end cover is fixedly fitted with the hand-cranked pump body, and a pump head sealing ring is installed in the second sealing groove on the lower periphery of the output shaft end cover. The pump head sealing ring is uniformly filled in the gap between the output shaft end cover and the hand-cranked pump body by a fixed clamping force, thereby sealing the upper port of the hand-cranked pump body and forming a second sealing cavity inside the hand-cranked pump body.

[0013] Furthermore, a third bearing is installed on each side of the Z7 bevel tooth. The cylindrical end of the crank handle adapter shaft and the one-way needle roller bearing form an alignment surface at one end near the Z7 bevel tooth. The first third bearing is located between the Z7 bevel tooth and the alignment surface, and the second third bearing is located on the outermost side near the second end of the crank handle shaft. A first bushing is installed between the second third bearing and the Z7 bevel tooth, and a second adjusting shim is installed between the first bushing and the Z7 bevel tooth.

[0014] Furthermore, the hand crank assembly includes: a crank handle, a folding handle, a handle shaft, and a handle shaft end cap. The folding handle is connected to the outer end of the crank handle. The inner end of the crank handle is fitted with the crank handle adapter shaft. The square end of the crank handle adapter shaft is inserted into the square hole at the inner end of the crank handle. The handle shaft passes through the center of the crank handle adapter shaft in the square hole at the inner end of the crank handle and is inserted into the first end of the crank handle shaft. The handle shaft end cap fits the outer end of the handle shaft to the outer side of the inner end of the crank handle.

[0015] Furthermore, the crank adapter shaft is provided with a third sealing groove at the crank port position on the side of the hand pump body, and the third sealing groove is filled with an adapter shaft sealing ring to form a second sealing cavity inside the hand pump body.

[0016] Furthermore, the device also includes a speed display assembly, which comprises: a Z8 gear, a motor mounting bracket, a gear mounting shaft, a Z9 gear set, a Z10 gear, a DC generator, a PCB pressure plate, and a speed display board; the Z8 gear is sleeved on the portion of the Z6 gear shaft that protrudes from the lower end of the input shaft end cover, the motor mounting bracket is mounted on the lower end of the input shaft end cover, the DC generator is mounted on the lower end of the motor mounting bracket, the Z9 gear set is mounted to the lower end of the input shaft end cover via the gear mounting shaft, one side of the Z9 gear set meshes with the Z8 gear, the other side of the Z9 gear set meshes with the Z10 gear, and the Z10 gear is assembled onto the drive shaft of the DC generator; the speed display board is press-fitted onto the hand-cranked pump body adjacent to the crank handle via the PCB pressure plate, and the voltage output terminal of the DC generator is electrically connected to the input terminal of the speed display board.

[0017] Furthermore, a PCB pressure plate sealing ring is installed in the fourth sealing groove on the hand pump body corresponding to the PCB pressure plate mounting position. The PCB pressure plate sealing ring uniformly fills the gap between the PCB pressure plate and the hand pump body by a fixed clamping force, thereby sealing the PCB mounting opening on the side of the hand pump body. The hand pump film is pasted on the PCB pressure plate, thereby sealing the opening of the PCB pressure plate speed indicator light, so as to form a second sealing cavity in the hand pump body.

[0018] Furthermore, a hand-cranked pump rear cover is fitted to the bottom of the hand-cranked pump body, and a buzzer is installed on the rear cover. A buzzer pressure plate is pressed onto the upper part of the buzzer, and the input end of the buzzer is connected to the signal output end of the speed display board. A rear cover sealing ring is provided between the hand-cranked pump rear cover and the hand-cranked pump body to form a second sealed cavity within the hand-cranked pump body. A buzzer waterproof membrane is pasted to the bottom of the mounting groove of the buzzer, and the buzzer pressure plate presses the buzzer tightly. The buzzer presses the buzzer waterproof membrane tightly, allowing sound to pass through the buzzer waterproof membrane while preventing water from passing through, thereby sealing the horn opening of the buzzer on the rear cover of the hand-cranked pump to form a second sealed cavity within the hand-cranked pump body.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] This application provides a novel hand-cranked blood pump drive device. Utilizing a hand-cranked assembly, manual power input is transmitted through a first and second torque transmission assembly within the pump body. This torque transmission direction is changed via a torque reversing assembly, ultimately converting the manual drive input into high-speed rotation of the rotor disk assembly, which drives the external pump head. The purely mechanical transmission structure ensures safe and reliable operation and a long service life, allowing for extended power output via manual drive. Bevel gear meshing enables side-crank rotation, driving the rotor disk assembly on the top front, achieving flexible torque reversal. The addition of axial limiting for planetary gears and a spherical structure for the sun gear at the center of the planetary carrier, along with dry lubrication of the gear shaft connection points, results in low friction, low noise, and high transmission efficiency. The structure of the first and second sealed cavities further enhances waterproofing and noise reduction. Attached Figure Description

[0021] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0022] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0023] Figure 1 A schematic diagram of the overall structure of a novel hand-cranked blood pump drive device provided in this application embodiment;

[0024] Figure 2 This is an exploded view of the structure of a novel hand-cranked blood pump drive device provided in an embodiment of this application;

[0025] Figure 3 A top view schematic diagram of a novel hand-cranked blood pump drive device provided in the embodiments of this application;

[0026] Figure 4 For example Figure 3 The diagram shows a cross-sectional view of a novel hand-cranked blood pump drive device.

[0027] Figure 5 For example Figure 3 A schematic diagram of the BB cross-section of a novel hand-cranked blood pump drive device is shown.

[0028] Figure 6 A schematic diagram of the second planetary carrier assembly of a novel hand-cranked blood pump drive device provided in this application embodiment;

[0029] Figure 7 Another structural schematic diagram of the second planetary carrier assembly of a novel hand-cranked blood pump drive device provided in this application embodiment;

[0030] Figure 8 For example Figure 3 A schematic diagram of the first planetary carrier assembly of a novel hand-cranked blood pump drive device is shown.

[0031] Figure 9 For example Figure 3 The diagram shows the structure of the Z1 gear shaft of a novel hand-cranked blood pump drive device.

[0032] In the diagram: 100, Hand-cranked pump body; 101, Second sealing cavity; 102, Quick-release fixing block; 103, Fourth sealing groove; 104, Hand-cranked pump rear cover; 105, Buzzer; 106, Buzzer pressure plate; 107, Rear cover sealing ring; 108, Buzzer waterproof membrane; 109, Crankshaft mounting component; 200, Pump drive mounting bracket assembly; 201, First sealing cavity; 300, Rotor disc assembly; 400, Hand crank assembly; 401, Crankshaft; 40 2. Handle; 403. Handle shaft; 404. Handle shaft end cap; 500. First torque transmission assembly; 501. Crank handle adapter shaft; 502. One-way needle roller bearing; 503. Crank handle shaft; 504. Third sealing groove; 505. Adapter shaft sealing ring; 506. Second bushing; 507. Third adjusting shim; 600. Second torque transmission assembly; 601. Z6 gear shaft; 602. Planetary transmission assembly; 603. Z1 gear shaft; 604. Z2 Gear; 605, Second planetary carrier assembly; 606, Z3 gear; 607, Z5 gear; 608, First planetary carrier assembly; 609, Input shaft end cover; 610, Output shaft end cover; 611, First sealing groove; 612, Second sealing groove; 613, Pump head sealing ring; 614, First bearing; 615, Second bearing; 616, First adjusting shim; 617, Limiting shaft; 618, Bottom gear of the second planetary carrier assembly; 700, Torque transmission Reversing assembly; 701, Z7 bevel gear; 702, third bearing; 703, first bushing; 704, second adjusting shim; 800, speed display assembly; 801, Z8 gear; 802, motor mounting bracket; 803, gear mounting shaft; 804, Z9 gear set; 805, Z10 gear; 806, DC generator; 807, PCB pressure plate; 808, speed display board; 809, PCB pressure plate sealing ring; 810, hand pump film. Detailed Implementation

[0033] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] The main objective of this application embodiment is to solve the technical problem that existing electric drive methods cannot provide power for a long time when the power supply equipment and battery power supply equipment are out of power or when outdoors by manually cranking the handle to enable the drive device to output power.

[0035] refer to Figures 1 to 3This application provides a novel hand-cranked blood pump drive device, which specifically includes: a hand-cranked pump body 100, a pump drive fixing seat assembly 200, a rotor disk assembly 300, a hand-cranked assembly 400, a first torque transmission assembly 500, a second torque transmission assembly 600, and a torque transmission reversing assembly 700.

[0036] The pump drive mounting bracket 200 is mounted on the hand pump body 100 to form a receiving cavity. The first torque transmission component 500 and the second torque transmission component 600 are arranged perpendicularly to each other in the receiving cavity and are connected by a torque transmission reversing component 700. The rotor disk assembly 300 is assembled to the top of the second torque transmission component 600 and is located below the pump drive mounting bracket 200. The hand crank component 400 extends into the hand pump body 100 from the side and is connected to the outer end of the first torque transmission component 500.

[0037] The hand crank assembly 400 includes a crank handle 401 and a handle 402. The handle 402 is connected to the outer end of the crank handle 401, and the square end of the crank handle adapter shaft 501 is inserted into the square hole at the inner end of the crank handle 401.

[0038] In this embodiment, the handle 402 is a folding handle. For example, the handle 402 can be folded at the outer end of the crank 401 by means of hinge.

[0039] The first torque transmission assembly 500 includes: a crank handle adapter shaft 501, a one-way needle roller bearing 502, and a crank handle shaft 503. The crank handle adapter shaft 501 is externally connected to the hand crank assembly 400, and the crank handle adapter shaft 501 is internally fitted onto the first end of the crank handle shaft 503. The one-way needle roller bearing 502 is assembled in the gap between the first end of the crank handle shaft 503 and the crank handle adapter shaft 501. This structural design allows for greater load-bearing capacity and easy replacement of the handle 402.

[0040] The hand crank assembly 400 also includes a handle shaft 403 and a handle shaft end cap 404. The handle shaft 403 passes through the center of the crank adapter shaft 501 in the square hole at the inner end of the crank handle 401 and is inserted to the first end of the crank handle shaft 503. The handle shaft end cap 404 assembles the outer end of the handle shaft 403 to the outer side of the inner end of the crank handle 401.

[0041] A second bushing 506 is provided between the first end of the crank shaft 503 and the bottom of the middle hole of the cylindrical end of the crank adapter shaft 501, and a third adjusting shim 507 is provided between the first end of the crank shaft 503 and the second bushing 506.

[0042] In the embodiments of this application, as described above, by optimizing the hand-cranked input shaft structure, the existing input shaft is optimized from internal assembly to external assembly, effectively solving the problem of difficulty in replacing the input shaft and its support bearing when they are damaged.

[0043] The second torque transmission assembly 600 includes: a Z6 gear shaft 601, a planetary transmission assembly 602, and a Z1 gear shaft 603; the upper end of the Z6 gear shaft 601 is connected to the lower end of the planetary transmission assembly 602, the Z1 gear at the lower end of the Z1 gear shaft 603 meshes with the gear at the upper end of the planetary transmission assembly 602, and the upper end of the Z1 gear shaft 603 is inserted into the bottom hole of the rotor disk assembly 300.

[0044] Involute planetary transmissions are widely used as speed reduction, speed increase, and speed change transmission devices in existing robotic hand crank drives.

[0045] Planetary drives typically employ multiple planetary gears to simultaneously transmit loads, thus splitting power and utilizing internal meshing. This results in advantages such as compact structure, small size, light weight, wide transmission ratio range, high transmission efficiency, smooth operation, low noise, and the ability to synthesize and decompose motion. However, in existing cylindrical planetary drive designs, the planet carrier in multi-stage planetary drives is generally not fixed; it can move axially. Repeated verification has revealed that during rotation, the planetary carrier and planetary gears cause the planetary gears to move towards higher speeds, driving the axial movement of each stage. The low-speed planetary carrier end face presses against the high-speed planetary carrier end face, resulting in a significant increase in end-face friction at high speeds, reducing transmission efficiency and drastically increasing noise from end-face friction.

[0046] To reduce end-face friction, there are currently two commonly used improvement methods:

[0047] 1. Improve lubrication conditions, mainly in the following two ways:

[0048] 1) Using liquid lubrication requires specially designed sealing grooves and oil grooves, which makes the entire transmission structure larger and also greatly restricts the placement of transmission components.

[0049] Because planetary multistage transmissions generate a large amount of heat during acceleration, the lubricating oil on the gear teeth is rapidly consumed. The presence of lubricating oil helps reduce noise and friction. Therefore, to ensure lubrication of planetary transmissions, existing planetary transmissions requiring long-term high-speed and high-efficiency operation all require highly sealed cavities and lubrication by immersing the gears in lubricating fluid. This lubrication structure significantly increases the size of the planetary transmission, and therefore, this structure is generally used in medium to large-sized equipment.

[0050] As mentioned above, the advantages of liquid-lubricated planetary transmission structures are: a wide transmission ratio range, smooth transmission, and low noise; the disadvantages are: complex structural design, large size, and poor sealing that can easily lead to lubrication leakage, damaging equipment life and causing environmental pollution; therefore, this structure is often used in industrial sectors, and is rarely used in medical products.

[0051] 2) The advantages of planetary transmission structure with solid lubrication are: simple structure, smooth transmission, and low noise when the transmission ratio is small; its disadvantage is: when the amount of solid lubricant applied to the transmission device is large, the transmission efficiency is greatly reduced and the starting torque is greatly increased. This structure is widely used in medical devices.

[0052] Most medical devices are used in hospitals, so there is a high demand for equipment noise control. Generally, the noise level of equipment should be below 65dB during normal use to avoid disturbing other staff / patients or affecting doctors' diagnoses. In some cases, the noise level of equipment should be below 60dB or even 55dB.

[0053] Currently, one common improvement method for hand-cranked drive devices on the market to reduce equipment noise is to increase the amount of solid lubricating silicone grease applied, which results in a relatively high starting torque for such transmission devices. Technical requirements for hand-cranked pumps state that the starting torque should be less than or equal to 1 N·m. Research and testing have shown that the normal operating noise of commonly used hand-cranked drive devices (transmission ratio > 30) in medical devices is in the range of 62-65 dB, and the noise can exceed 65 dB under high load. Furthermore, solid lubricating grease, if stored for a long time, may dry out and completely harden, posing a risk of preventing the equipment from starting.

[0054] 2. Improve friction conditions: By reducing the axial movement distance of the planetary carrier, the end-face impact and electrical end-face friction area of ​​the planetary carrier and planetary gears are reduced, thereby reducing the noise generated by the gear transmission. For example, by adding limit screws to connect the planetary carriers in series and separating multiple planetary carriers front and back, the accumulation of end-face axial forces from all planetary carriers is avoided, thereby reducing the positive pressure of end-face friction, thus reducing friction and indirectly reducing the noise generated by end-face friction. Its advantages are: avoiding the accumulation of axial loads on the planetary carrier and planetary gears, reducing end-face wear, and slightly reducing noise; its disadvantages are the following two aspects:

[0055] 1) This structure mainly reduces the cumulative axial load, but it cannot effectively improve the end face friction, so its effect on noise reduction is not obvious;

[0056] 2) Adding an axial limiting screw structure in the middle of the planetary carrier can only be applied to medium or large-sized equipment. This is because small equipment has a sun gear in the middle of the planetary carrier; drilling a hole in the middle would reduce the gear's strength, potentially leading to gear root breakage. In medium to large-sized planetary carriers, the sun gear is larger, so adding a relatively small axial limiting screw does not affect its structural strength.

[0057] As can be seen from the above description, existing planetary transmission technology cannot effectively solve the problems of small size, low noise, and high transmission efficiency.

[0058] Currently, hand-cranked drive devices used in medical devices such as ECMO systems and hemodialysis machines widely adopt straight-cylinder planetary transmission and solid lubrication. The advantages are small size and relatively controlled noise. However, there are still no good solutions for noise reduction and starting torque reduction. As a result, the hand-cranked drive devices used in medical devices are relatively noisy and have a large starting torque. If a person manually cranks the drive device, they will get very tired after about ten minutes and need to be replaced to continue cranking.

[0059] To address the aforementioned problems in the existing technology, reference is made to... Figure 1 , Figures 6 to 8 In this embodiment, the planetary transmission assembly 602 includes: a Z2 gear 604, a second planetary carrier assembly 605, a Z3 gear 606, a Z5 gear 607, and a first planetary carrier assembly 608. The second planetary carrier assembly 605 and the first planetary carrier assembly 608 are disposed in the gear tooth hole in the middle of the Z3 gear 606. The Z2 gear 604 and the Z5 gear 607 are respectively mounted on the second planetary carrier assembly 605 and the first planetary carrier assembly 608. Both the second planetary carrier assembly 605 and the first planetary carrier assembly 608 are provided with... The limiting shaft 617 axially limits the Z2 gear 604 and Z5 gear 607 through the upper limiting end. Both the Z2 gear 604 and Z5 gear 607 mesh with the internal teeth of the Z3 gear 606. The bottom gear 618 of the second planetary carrier assembly is inserted into the middle of the Z5 gear 607 and meshes with the Z5 gear 607. The lower end of the Z1 gear shaft 603 inserts the Z1 gear into the middle of the Z2 gear 604 and meshes with the Z2 gear 604. The upper end of the Z6 gear shaft 601 is inserted into the middle of the first planetary carrier assembly 608.

[0060] The planetary transmission assembly 602 also includes: an input shaft end cover 609 and an output shaft end cover 610. The output shaft end cover 610 is installed on the opening of the hand pump body 100. The pump drive mounting bracket 200 is installed on the top of the hand pump body 100 and the output shaft end cover 610. The upper end of the Z1 gear shaft 603 passes through the output shaft end cover 610 and is inserted into the bottom hole of the rotor disk assembly 300. The Z3 gear 606 is fixedly installed between the input shaft end cover 609 and the output shaft end cover 610. The upper end of the Z6 gear shaft 601 passes through the input shaft end cover 609 and is inserted into the middle of the first planetary carrier assembly 608.

[0061] The portion of Z1 gear shaft 603 located inside the output shaft end cover 610 is fitted with two first bearings 614; the portion of Z6 gear shaft 601 located inside the input shaft end cover 609 is fitted with two second bearings 615, and a first adjusting shim 616 is provided between the upper second bearing 615 and the first planetary carrier assembly 608.

[0062] In this embodiment, both Z2 gear 604 and Z5 gear 607 are three-gear assemblies (3 pieces of gears). The second planetary carrier assembly 605 has limiting shafts 617 at each gear position relative to Z2 gear 604. These limiting shafts 617 not only limit the gears on the upper surface of the second planetary carrier assembly 605, but also have an outer diameter after passing through each gear that is larger than the gear mounting holes of Z2 gear 604, thus axially limiting the gears. Similarly, the first planetary carrier assembly 608 also has limiting shafts 617 at each gear position relative to Z5 gear 607. These limiting shafts 617 not only limit the gears on the upper surface of the first planetary carrier assembly 608, but also have an outer diameter after passing through each gear that is larger than the gear mounting holes of Z5 gear 607, thus axially limiting the gears.

[0063] Additionally, refer to Figure 7 In this embodiment of the invention, the lower end face of the Z1 gear shaft 603 is an arc-shaped surface, so the contact portion between the lower end face of the Z1 gear shaft 603 and the second planetary carrier assembly 605 is a small end face / point contact. (Reference) Figure 9 The lower end face of the bottom gear 618 of the second planetary carrier assembly is also an arc surface. Thus, the contact portion between the lower end face of the bottom gear of the second planetary carrier assembly and the first planetary carrier assembly 608 is also a small end face / point contact.

[0064] By optimizing the planetary gear structure, the existing technology addresses the issue of axial movement of planetary gears causing friction between the planetary gears and the large end face of the lower-level planetary carrier. By separating the planetary gears from the lower-level planetary carrier and restricting the axial movement of the planetary gears with a separate limiting shaft, the rotational inertia of the planetary carrier is reduced. This optimizes the large end face friction into small end face friction / point friction, which can greatly reduce the impact noise and frictional torque generated by the axial movement of planetary gears and end face friction, and improve the service life of the equipment.

[0065] refer to Figure 4 and Figure 5 The pump drive mounting bracket 200 is mounted on the top of the hand-cranked pump body 100 and the output shaft end cover 610. The bottom of the pump drive mounting bracket 200 has a built-in sealing ring installed in the first sealing groove 611 on the periphery of the output shaft end cover 610, forming a first sealing cavity 201 between the pump drive mounting bracket 200 and the output shaft end cover 610. The rotor disk assembly 300 is located in the first sealing cavity 201.

[0066] The torque transmission reversing assembly 700 includes a Z7 bevel gear 701, which is mounted on a crank shaft 503. The crank shaft 503 is connected to the Z7 bevel gear 701 via a flat key. The lower gear of the Z6 gear shaft 601 meshes with the upper side gear of the torque transmission reversing assembly 700.

[0067] In this embodiment, the torque transmission reversing component adopts bevel gear transmission. Through bevel gear meshing, it can be manually rotated from the side, driving the rotor disk component on the top front to rotate, thus realizing flexible steering of the manually driven torque.

[0068] A third bearing 702 is installed on each side of the Z7 bevel gear 701. The cylindrical end of the crank handle adapter shaft 501 and the one-way needle roller bearing 502 form an alignment surface near the end of the Z7 bevel gear 701. The first third bearing 702 is located between the Z7 bevel gear 701 and the alignment surface. The second third bearing 702 is located on the outermost side of the second end of the crank handle shaft 503. A first bushing 703 is installed between the second third bearing 702 and the Z7 bevel gear 701. A second adjusting shim 704 is installed between the first bushing 703 and the Z7 bevel gear 701.

[0069] In this embodiment, the hand-cranked assembly allows for manual power input. Inside the hand-cranked pump body, the first and second torque transmission assemblies, through a torque transmission reversal assembly, convert the manual drive input into high-speed rotation of the rotor disk assembly, which can drive the external pump head to rotate. The purely mechanical transmission structure ensures the device is safe, reliable, and has a long service life. Outdoors or during power outages, the pump can be driven manually for extended periods to provide power output.

[0070] In addition, the integrated input and output structure design in this embodiment makes the pump drive device small in size and light in weight, and easy to move.

[0071] In this embodiment, the internal gear transmission has a speed-increasing function, enabling high-speed rotor disk rotation output through a low-speed hand-crank power input. Specifically, refer to... Figure 2 and Figure 4 The following is a detailed description of how multi-stage gear transmission achieves speed increase.

[0072] The first stage of transmission speed increase is achieved by the transmission direction from the meshing of the Z7 bevel gear 701 to the Z6 gear shaft 601. Specifically, the number of teeth on the gear shaft of the Z7 bevel gear 701 is greater than the number of meshing gears on the Z6 gear shaft 601, thereby realizing the first stage of transmission speed increase.

[0073] The second-stage transmission speed increase is achieved by transmitting torque from the Z6 gear shaft 601 to the first planetary carrier assembly 608 via an interference fit. Then, the torque is transmitted from the Z5 gear 607 (3 pieces of gear) on the first planetary carrier assembly 608 to the second planetary carrier assembly 605 via meshing with the internal teeth of the Z3 gear 606 and the bottom gear 618 of the second planetary carrier assembly (where the Z3 gear 606 is a fixed gear).

[0074] The third-stage transmission speed increase is achieved by the torque being transmitted from the Z2 gear 604 (3pcs gears) on the second planetary carrier assembly 605 to the Z1 gear shaft 603 through the meshing of the internal teeth of the Z3 gear 606 and the Z1 gear at the lower end of the Z1 gear shaft 603 (where the Z3 gear 606 is a fixed gear).

[0075] As described above, in the embodiments of this application, multi-stage gear transmission such as bevel gears and planetary gears is used to increase speed, effectively achieving low-speed input and stable high-speed output.

[0076] A quick-release fixing block 102 is provided on the side of the hand pump body 100 opposite to the handle 401. The quick-release fixing block 102 can be used for the weight balance of the entire device and the quick installation and fastening of the entire device.

[0077] In this embodiment of the application, a novel hand-cranked blood pump drive device further includes: a speed display component 800, which specifically includes: a Z8 gear 801, a motor mounting bracket 802, a gear mounting shaft 803, a Z9 gear set 804, a Z10 gear 805, a DC generator 806, a PCB pressure plate 807, and a speed display board 808.

[0078] Furthermore, the Z8 gear 801 is sleeved on the portion of the Z6 gear shaft 601 that protrudes from the lower end of the input shaft end cover 609. A motor mounting bracket 802 is installed at the lower end of the input shaft end cover 609, and a DC generator 806 is installed at the lower end of the motor mounting bracket 802. The Z9 gear set 804 is installed to the lower end of the input shaft end cover 609 via the gear mounting shaft 803. One side of the Z9 gear set 804 meshes with the Z8 gear 801, and the other side of the Z9 gear set 804 meshes with the Z10 gear 805. The Z10 gear 805 is assembled onto the drive shaft of the DC generator 806. The speed display panel 808 is press-fitted onto the hand pump body 100 adjacent to the crank handle 401 via the PCB pressure plate 807. The voltage output terminal of the DC generator 806 is electrically connected to the input terminal of the speed display panel 808.

[0079] The bottom of the hand pump body 100 is equipped with a hand pump rear cover 104, a buzzer 105 is installed on the hand pump rear cover 104, a buzzer pressure plate 106 is pressed on the upper part of the buzzer 105, and the signal output terminal of the speed display board 808 is connected to the input terminal of the buzzer 105.

[0080] At least one crank shaft mounting part 109 is provided on the rear cover 104 of the hand-cranked pump, and the second end of the crank shaft 503 is mounted to the crank shaft mounting part 109.

[0081] In this embodiment, as described above, in addition to forming a first sealing cavity 201 between the pump drive mounting assembly 200 and the output shaft end cover 610 to accommodate the rotor disk assembly 300, a second sealing cavity 101 is also formed in the hand-cranked pump body 100 to seal and accommodate the various components within the hand-cranked pump body 100. (See reference...) Figure 2 , Figure 4 and Figure 5 The formation of the second sealed cavity 101 will be described in detail below.

[0082] (1) The outer periphery of the output shaft end cover 610 is fixedly fitted with the hand pump body 100. The pump head sealing ring 613 is installed in the second sealing groove 612 on the lower periphery of the output shaft end cover 610. The pump head sealing ring 613 is evenly filled in the gap between the output shaft end cover 610 and the hand pump body 100 by a fixed clamping force, thereby achieving the sealing of the upper port of the hand pump body 100.

[0083] (2) A third sealing groove 504 is provided at the position of the crank port on the side of the hand crank pump body 100, and the third sealing groove 504 is filled with a crank shaft sealing ring 505.

[0084] (3) A PCB pressure plate sealing ring 809 is installed in the fourth sealing groove 103 on the hand pump body 100 corresponding to the installation position of the PCB pressure plate 807. The PCB pressure plate sealing ring 809 fills the gap between the PCB pressure plate 807 and the hand pump body 100 evenly by fixing the clamping force, thereby sealing the PCB installation opening on the side of the hand pump body 100.

[0085] (4) A hand pump film 810 is pasted on the PCB pressure plate 807 to seal the opening of the speed indicator light on the PCB pressure plate 807.

[0086] (5) A rear cover sealing ring 107 is provided between the rear cover 104 of the hand pump and the main body 100 of the hand pump.

[0087] (6) A buzzer waterproof membrane 108 is pasted at the bottom of the mounting slot of the buzzer 105. The buzzer pressure plate 106 presses the buzzer 105 tightly, and the buzzer 105 presses the buzzer waterproof membrane 108 tightly. Sound can pass through the buzzer waterproof membrane 108, but water cannot pass through the buzzer waterproof membrane 108, thereby achieving a seal on the horn opening of the buzzer 105 on the back cover 104 of the hand pump.

[0088] In summary, the sealing structures (1) to (6) form a second sealing cavity 101 within the hand-cranked pump body 100. The first sealing cavity 201 and the second sealing cavity 101 can achieve waterproof and dustproof functions, preventing external environments from adversely affecting the internal components of the pump drive device. The outer shell is made of corrosion-resistant material, and through the overall sealing design, it meets the overall IPX4 performance of the pump drive device, thus isolating the internal operating environment of the novel blood pump hand-cranked drive device disclosed in the above-mentioned embodiments from the external environment, improving the safety, reliability, and service life of the pump drive device.

[0089] In this embodiment, by applying a dry lubricating film to each gear, it is possible to eliminate the need for adding other lubricating liquids or solid lubricants. This solves the problem of increased starting torque caused by lubricants and mitigates the risks of equipment damage and environmental pollution caused by lubricant leakage. By improving the lubrication method of gear meshing, the problem of high starting torque caused by fixed grease is solved, the transmission efficiency of planetary gears is improved, and the risk of emergency equipment becoming unusable due to the complete solidification of solid grease after prolonged storage is effectively avoided.

[0090] In the embodiments of this application, the production materials of the above-mentioned components are all commonly used environmentally friendly and non-toxic raw materials, which solves the problem of groundwater and land pollution caused by waste batteries.

[0091] refer to Figures 1 to 3 The working principle or usage method of the novel blood pump hand-cranked drive device disclosed in the embodiments of this application will be described in detail below.

[0092] First, the clockwise rotation of the crank handle is described. When the crank handle 401 is rotated clockwise from the side via the handle 402, the crank handle 401 transmits torque to the outer ring of the one-way needle roller bearing 502 through the square end of the crank handle adapter shaft 501. As the outer ring of the one-way needle roller bearing 502 rotates clockwise, the torque is transmitted to the crank shaft 503 through the inner ring of the bearing. The crank shaft 503 transmits torque to the Z7 bevel gear 701 via a flat key, changing the direction of the torque transmission. The Z7 bevel gear 701 then transmits torque to the Z6 gear shaft 601 through meshing with it. The Z6 gear shaft 601 transmits torque to the planetary transmission assembly 602 through an interference fit. The planetary transmission assembly 602 transmits torque to the Z1 gear shaft 603 through the meshing relationship between the planetary gears. The Z1 gear shaft 603 transmits torque to the rotor disk assembly 300 through an interference fit. The rotor disk assembly 300 rotates and drives the external pump head to rotate on the pump drive mounting assembly 200 through magnetic coupling.

[0093] The planetary transmission assembly 602 transmits torque to the Z1 gear shaft 603 through planetary gear meshing. Specifically, the Z6 gear shaft 601 transmits torque to the first planetary carrier assembly 608 through an interference fit with the first planetary carrier assembly 608. The first planetary carrier assembly 608 drives the Z5 gear 607 to rotate around the center of the first planetary carrier assembly 608. The Z5 gear 607 is a three-gear assembly (3 pieces of gears) and meshes with the internal teeth of the Z3 gear 606. Since the Z3 gear 606 is fixed, the three gears of the Z5 gear 607 rotate around their respective centers under the drive of the first planetary carrier assembly 608. Gear Z5 607 meshes with gear 618 at the bottom of the second planetary carrier assembly, causing the second planetary carrier assembly 605 to rotate. The second planetary carrier assembly 605 then causes gear Z2 604 to rotate around it. Similarly, gear Z2 604 is a three-gear assembly (3 gears) and meshes with the internal teeth of gear Z3 606. Since gear Z3 606 is fixed, the three gears of gear Z2 604 rotate around their respective centers under the influence of the second planetary carrier assembly 605.

[0094] In this embodiment, the electric drive module is removed. Instead, manual power input is used to drive the rotor disk assembly at high speed, which in turn drives the external pump head via magnetic coupling. The entire transmission process employs a purely mechanical structure, enabling it to withstand harsh environmental conditions. This addresses the potential hazards of fire and explosion caused by improper battery storage, drops, or impacts, as well as issues with short battery life and limited cycle life. The device is characterized by high reliability, maintenance-free operation, and long service life. Furthermore, the integrated input and output structure design eliminates the safety hazards caused by improper battery charging / discharging and storage, resulting from the separate input battery module and output pump assembly in older technologies. This also makes the device small, lightweight, easy to store and place, and readily available for use.

[0095] Simultaneously with the above process, when the crank handle is turned clockwise, the Z6 gear shaft 601 transmits torque to the Z8 gear 801 via a flat key. The Z8 gear 801 then transmits torque to the Z9 gear set 804 through meshing. The Z9 gear set 804, in turn, transmits torque to the Z10 gear 805 through meshing. The Z10 gear 805, through an interference fit with the DC generator 806, drives the DC generator 806 to rotate, converting the current speed of the rotor disk assembly 300 into voltage. This voltage is then used by the speed display panel 808 to illuminate the light corresponding to the current speed of the rotor disk assembly 300. Furthermore, when the converted voltage reaches a preset alarm value, the speed display panel 808 sends a trigger signal to the buzzer 105, which then sounds.

[0096] In this embodiment, the speed display component is used to display the current speed, and the buzzer is used to monitor and alarm the speed.

[0097] When the crank handle is turned counterclockwise, the crank handle 401 is turned counterclockwise via the folding handle 402. The crank handle 401 transmits torque to the outer ring of the one-way needle roller bearing 502 through the square end of the crank handle adapter shaft 501. When the outer ring of the one-way needle roller bearing 502 rotates counterclockwise, the outer ring of the one-way needle roller bearing 502 spins freely and cannot transmit torque to the crank handle shaft 503 through the inner ring of the one-way needle roller bearing 502, and therefore cannot drive the rotor disk assembly 300 to rotate.

[0098] In this embodiment, a one-way needle roller bearing is used as a one-way connector to achieve unidirectional torque transmission. Clockwise rotation of the handle transmits torque, causing the rotor disk assembly to rotate clockwise as well; counterclockwise rotation of the handle fails to transmit torque to the rotor disk assembly, resulting in no rotation output from the rotor disk assembly. This fulfills the requirement that the pump drive device can transmit torque in the forward direction and idle in the reverse direction, avoiding the safety hazards caused by reverse rotation of the pump drive device.

[0099] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A hand-cranked blood pump drive device, characterized in that, The device includes: a hand-cranked pump body, a pump drive mounting base assembly, a rotor disk assembly, a hand-cranking assembly, a first torque transmission assembly, a second torque transmission assembly, and a torque transmission reversing assembly; the pump drive mounting base assembly is fitted onto the hand-cranked pump body to form a receiving cavity; the first torque transmission assembly and the second torque transmission assembly are arranged perpendicularly to each other in the receiving cavity and are connected by reversing transmission through the torque transmission reversing assembly; the rotor disk assembly is assembled to the top of the second torque transmission assembly and is located below the pump drive mounting base assembly; the hand-cranking assembly extends into the hand-cranked pump body from the side and is connected to the outer end of the first torque transmission assembly. The first torque transmission assembly includes: a crank handle adapter shaft, a one-way needle roller bearing, and a crank handle shaft; the crank handle adapter shaft is externally connected to the hand crank assembly for transmission, the crank handle adapter shaft is internally fitted onto the first end of the crank handle shaft, and the one-way needle roller bearing is assembled in the gap between the first end of the crank handle shaft and the crank handle adapter shaft. The second torque transmission assembly includes: Z6 gear shaft, planetary transmission assembly, and Z1 gear shaft; the upper end of Z6 gear shaft is connected to the lower end of planetary transmission assembly, the lower end of Z1 gear shaft meshes with the upper end of planetary transmission assembly gear, the upper end of Z1 gear shaft is inserted into the bottom hole of rotor disk assembly, and the lower end face of Z1 gear shaft is arc-shaped. The torque transmission reversing assembly includes a Z7 bevel gear, which is mounted on a crank shaft. The crank shaft is connected to the Z7 bevel gear via a flat key. The lower gear of the Z6 gear shaft meshes with the upper gear of the torque transmission reversing assembly.

2. The hand-cranked blood pump drive device as described in claim 1, characterized in that, The planetary transmission assembly includes: a Z2 gear, a second planetary carrier assembly, a Z3 gear, a Z5 gear, a first planetary carrier assembly, an input shaft end cover, and an output shaft end cover. The second planetary carrier assembly and the first planetary carrier assembly are disposed in the gear tooth hole in the middle of the Z3 gear. The Z2 gear and the Z5 gear are respectively mounted on the second planetary carrier assembly and the first planetary carrier assembly. Both the second planetary carrier assembly and the first planetary carrier assembly are provided with limit shafts. The limit shafts axially limit the Z2 gear and the Z5 gear through the upper limit end. The Z2 gear and the Z5 gear mesh with the internal teeth of the Z3 gear. The bottom gear of the second planetary carrier assembly is inserted into the middle of the Z5 gear and... The Z5 gear meshes, the lower end face of the bottom gear of the second planetary carrier assembly is an arc surface, the lower end of the Z1 gear shaft is inserted into the middle of the Z2 gear and meshes with the Z2 gear, the upper end of the Z6 gear shaft is inserted into the middle of the first planetary carrier assembly; the output shaft end cover is installed on the opening of the hand pump body, the pump drive fixing seat assembly is covered on the top of the hand pump body and the output shaft end cover; the upper end of the Z1 gear shaft passes through the output shaft end cover and is inserted into the bottom hole of the rotor disk assembly; the Z3 gear is installed between the input shaft end cover and the output shaft end cover, the upper end of the Z6 gear shaft passes through the input shaft end cover and is inserted into the middle of the first planetary carrier assembly; The pump drive mounting bracket is installed on the top of the hand-cranked pump body and the output shaft end cover. The bottom of the pump drive mounting bracket has a built-in sealing ring installed in the first sealing groove around the output shaft end cover. The pump drive mounting bracket and the output shaft end cover form a first sealing cavity, and the rotor disk assembly is located in the first sealing cavity.

3. The hand-cranked blood pump drive device as described in claim 1, characterized in that, The outer periphery of the output shaft end cover is fixedly fitted with the hand-cranked pump body. A pump head sealing ring is installed in the second sealing groove on the lower periphery of the output shaft end cover. The pump head sealing ring is evenly filled in the gap between the output shaft end cover and the hand-cranked pump body by a fixed clamping force, thereby sealing the upper port of the hand-cranked pump body and forming a second sealing cavity inside the hand-cranked pump body.

4. The hand-cranked blood pump drive device as described in claim 1, characterized in that, A third bearing is installed on each side of the Z7 bevel gear. The cylindrical end of the crank handle adapter shaft and the one-way needle roller bearing form an alignment surface at the end near the Z7 bevel gear. The first third bearing is located between the Z7 bevel gear and the alignment surface. The second third bearing is located on the outermost side near the second end of the crank handle shaft. A first bushing is installed between the second third bearing and the Z7 bevel gear. A second adjusting shim is installed between the first bushing and the Z7 bevel gear.

5. The hand-cranked blood pump drive device as described in claim 1, characterized in that, The hand crank assembly includes: a crank handle, a folding handle, a handle shaft, and a handle shaft end cap. The folding handle is connected to the outer end of the crank handle. The inner end of the crank handle is fitted with a crank handle adapter shaft, and the square end of the crank handle adapter shaft is inserted into the square hole at the inner end of the crank handle. The handle shaft passes through the center of the crank handle adapter shaft in the square hole at the inner end of the crank handle and is inserted into the first end of the crank handle shaft. The handle shaft end cap fits the outer end of the handle shaft to the outer side of the inner end of the crank handle.

6. The hand-cranked blood pump drive device as described in claim 5, characterized in that, The crank adapter shaft is provided with a third sealing groove at the crank port position on the side of the hand pump body. The third sealing groove is filled with an adapter shaft sealing ring to form a second sealing cavity inside the hand pump body.

7. A hand-cranked blood pump drive device as described in any one of claims 6, characterized in that, The device further includes: a speed display assembly, which includes: a Z8 gear, a motor mounting bracket, a gear mounting shaft, a Z9 gear set, a Z10 gear, a DC generator, a PCB pressure plate, and a speed display board; the Z8 gear is sleeved on the part of the Z6 gear shaft that protrudes from the lower end of the input shaft end cover, the lower end of the input shaft end cover is equipped with a motor mounting bracket, the lower end of the motor mounting bracket is equipped with a DC generator, the Z9 gear set is installed to the lower end of the input shaft end cover through the gear mounting shaft, one side of the Z9 gear set meshes with the Z8 gear, the other side of the Z9 gear set meshes with the Z10 gear, and the Z10 gear is assembled onto the drive shaft of the DC generator; the speed display board is press-fitted onto the hand pump body adjacent to the crank handle through the PCB pressure plate, and the voltage output terminal of the DC generator is electrically connected to the input terminal of the speed display board.

8. The hand-cranked blood pump drive device as described in claim 7, characterized in that, A PCB pressure plate sealing ring is installed in the fourth sealing groove on the main body of the hand pump corresponding to the PCB pressure plate mounting position. The PCB pressure plate sealing ring fills the gap between the PCB pressure plate and the main body of the hand pump evenly by fixing and clamping force, thereby sealing the PCB mounting opening on the side of the main body of the hand pump. A hand pump film is pasted on the PCB pressure plate, thereby sealing the opening of the PCB pressure plate speed indicator light, so as to form a second sealing cavity inside the main body of the hand pump.

9. A hand-cranked blood pump drive device as described in claim 8, characterized in that, The bottom of the hand-cranked pump body is equipped with a hand-cranked pump rear cover, on which a buzzer is installed. A buzzer pressure plate is pressed onto the top of the buzzer, and the input end of the buzzer is connected to the signal output end of the speed display board. A rear cover sealing ring is provided between the hand-cranked pump rear cover and the hand-cranked pump body to form a second sealed cavity inside the hand-cranked pump body. A buzzer waterproof membrane is pasted to the bottom of the buzzer mounting slot. The buzzer pressure plate presses the buzzer tightly, and the buzzer presses the buzzer tightly against the buzzer waterproof membrane. Sound can pass through the buzzer waterproof membrane, but water cannot pass through the buzzer waterproof membrane, thereby sealing the horn opening of the buzzer on the hand-cranked pump rear cover to form a second sealed cavity inside the hand-cranked pump body.

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