A hand-cranked driving device for a blood pump

Abstract

The present invention provides a hand-cranked drive device for a blood pump, which increases the circumferential rotational inertia and transmission stability of the planetary gears during rotation by optimizing the structure of the planetary carrier and the planetary gear structure; reduces the mass of the intermediate structure of the large bevel gear by optimizing the bevel gear structure, increases the structural weight around the bevel gear pitch circle, and greatly reduces the holding torque of the planetary transmission, thereby extending the single-person usage time of the hand-cranked drive device; reduces the axial impact load of the one-way bearing by optimizing the assembly structure position of the one-way bearing, and increases the service life of the one-way bearing; and solves the problems of difficulty in manual driving of the hand-cranked drive device for a long time and easy damage of the one-way bearing by optimizing the design of the gear transmission structure and the installation structure of the one-way bearing.

Description

Technical Field

[0001] The invention belongs to the technical field of driving an extracorporeal blood circulation pump, and in particular relates to a hand-cranked driving device for a blood pump. Background Art

[0002] Traditional blood pumps for extracorporeal circulation use an electric motor to generate high-speed power. This power source typically uses batteries or other equipment to directly power the pump.

[0003] Involute planetary transmissions are widely used in existing mechanical hand-cranked drives as speed reduction, speed increase, and speed change transmissions. These drives typically employ multiple planetary gears to simultaneously transmit loads, distribute power, and utilize internal meshing. These drives offer advantages such as compact structure, small size, light weight, a wide transmission ratio range, high transmission efficiency, smooth operation, low noise, and the ability to synthesize and decompose motion. This wide transmission ratio range results in a high starting torque for planetary drives. When the transmission ratio exceeds 30, the transmission torque is so high that manual cranking becomes extremely laborious. It is difficult for an average person to maintain this high torque for extended periods of time. Therefore, drives employing planetary transmission structures are rarely used in manual cranking applications requiring prolonged operation.

[0004] The disadvantages of existing planetary transmission structure technology are as follows:

[0005] 1) It mainly reduces the accumulated axial load, but cannot improve the end face friction, so the effect of reducing the transmission torque of the planetary transmission is not obvious;

[0006] 2) Adding an axial stop screw in the center of the planetary carrier is only applicable to medium-sized or large equipment. Because the sun gear is located in the center of the planetary carrier of small equipment, drilling a hole there would reduce the gear's strength, potentially leading to the risk of gear tooth root fracture. On medium-to-large planetary carriers, the sun gear is larger, so adding a relatively small axial stop screw does not affect its structural strength.

[0007] From the above description, it can be concluded that the existing planetary transmission technology cannot effectively solve the problem of the difficulty of manual driving of the planetary transmission structure for a long time. For example, the hand-cranked drive devices used in medical equipment such as ECMO systems or hemodialysis machines on the market now widely use straight-cylinder planetary transmissions, and adopt a solid lubrication and axial limit structure, which has the advantage of small size. It is light in weight, the transmission efficiency can be improved to a certain extent, and the starting torque can be controlled to a certain extent. However, there is still no better solution to keep the torque of the planetary transmission low during continuous operation. As a result, the operating torque of the hand-cranked drive devices currently used in medical equipment is relatively large. If the hand-cranked drive device is manually cranked, it will be very tiring after shaking for about a few minutes, and it is necessary to change people in time to continue shaking. Summary of the Invention

[0008] To this end, an embodiment of the present invention provides a hand-cranked drive device for a blood pump, which can effectively extend the use time of a single-person hand-cranked drive device, thereby solving the technical problem of the existing hand-cranked drive device being laborious and requiring long-term manual cranking.

[0009] In order to achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0010] The embodiment of the present application provides a hand-cranked drive device for a blood pump, the device comprising: a hand-cranked pump body, a pump drive fixing seat assembly, a rotor disk assembly, a hand-cranked assembly, a first torque transmission assembly, a second torque transmission assembly, and a torque transmission direction changing assembly;

[0011] The pump drive fixing seat assembly cover is mounted on the hand pump body to form an accommodating cavity. The first torque transmission assembly and the second torque transmission assembly are arranged perpendicular to each other in the accommodating cavity and are connected in direction-changing transmission through the torque transmission direction-changing assembly. The rotor disk assembly is assembled to the top of the second torque transmission assembly and is located below the pump drive fixing seat assembly. The hand crank assembly extends into the hand pump body from the side and is in transmission connection with the outer end of the first torque transmission assembly.

[0012] Furthermore, the first torque transmission assembly includes: a crank adapter shaft, a crank shaft, and a one-way roller bearing; the crank adapter shaft is externally connected to the hand crank assembly in a transmission manner, the crank adapter shaft is internally sleeved on the outside of the first end of the crank shaft, the one-way roller bearing is located on the inner side of the torque transmission direction-changing assembly and assembled on the second end of the crank shaft, and the crank shaft is connected to the inner ring of the one-way roller bearing in a transmission manner via a flat key;

[0013] Furthermore, 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 Z1 gear at the lower end of the Z1 gear shaft is meshed with the gear at the upper end of the planetary transmission assembly, and the upper end of the Z1 gear shaft is inserted into the bottom hole of the rotor disk assembly;

[0014] Furthermore, the torque transmission direction-changing assembly comprises: a Z7 bevel gear, the Z7 bevel gear is sleeved on the crank shaft, the inner side of the gear of the Z7 bevel gear (701) is transmission-connected with the outer ring of the one-way roller bearing, and the lower end gear of the Z6 gear shaft is meshed with the upper side gear of the Z7 bevel gear;

[0015] Furthermore, the planetary transmission assembly includes: a Z2 gear, a second planetary carrier assembly, a Z3 gear, a Z5 gear, and a first planetary carrier assembly; the second planetary carrier assembly and the first planetary carrier assembly are arranged in the gear hole in the middle of the Z3 gear, and the Z2 gear and the Z5 gear are respectively installed on the second planetary carrier assembly and the first planetary carrier assembly, and the second planetary carrier assembly and the first planetary carrier assembly are both provided with a limiting shaft, the Z2 gear and the Z5 gear are both engaged 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 engaged with the Z5 gear, the Z1 gear at the lower end of the Z1 gear shaft is inserted into the middle of the Z2 gear and engaged with the Z2 gear, and the upper end of the Z6 gear shaft is inserted into the middle of the first planetary carrier assembly.

[0016] Furthermore, the planetary transmission assembly also includes: an input shaft end cover and an output shaft end cover, the output shaft end cover is installed on the upper end of the hand pump body, and the middle raised opening of the output shaft end cover is sleeved on the middle opening of the upper end of the hand pump body; 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, and 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.

[0017] Furthermore, the pump drive fixing seat assembly cover is installed on the top of the hand pump body, and the sealing ring at the bottom of the pump drive fixing seat assembly is installed in the first sealing groove on the upper periphery of the hand pump body. A first sealed cavity is formed between the pump drive fixing seat assembly and the hand pump body, and the rotor disk assembly is located in the first sealed cavity.

[0018] Furthermore, the outer periphery of the output shaft end cover is fixedly matched with the hand pump body to form a second sealed cavity in the hand pump body.

[0019] Furthermore, a second bearing is installed on the outside of the Z7 bevel gear, and a first washer is installed on both sides of the second bearing; a third bearing is installed on the outside of the one-way roller bearing, and a shaft retaining ring is installed between the one-way roller bearing and the inner side of the gear of the Z7 bevel gear.

[0020] Furthermore, the hand crank assembly includes: a crank handle, a folding handle, a handle shaft and a handle shaft gasket, the folding handle is connected to the outer end of the crank handle, the inner end of the crank handle is equipped with the crank adapter shaft, the square end of the crank 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 adapter shaft in the square hole at the inner end of the crank handle and is inserted into the first end of the crank shaft, and the handle shaft gasket is installed between the outer end of the handle shaft and the crank handle.

[0021] Furthermore, a third sealing groove is provided on the crank adapter shaft at a position corresponding to the crank port 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 in the hand pump body.

[0022] Furthermore, the device also includes: a speed display component, which includes: a Z8 gear, a motor mounting frame, 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 passes through the lower end of the input shaft end cover, the lower end of the input shaft end cover is equipped with the motor mounting frame, the lower end of the motor mounting frame is equipped with the 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 is meshed with the Z8 gear, and the other side of the Z9 gear set is meshed with the Z10 gear, and the Z10 gear is assembled to the drive shaft of the DC generator; the speed display board is pressed onto the side of the hand pump body adjacent to the crank handle through the PCB pressure plate, and the voltage output end of the DC generator is electrically connected to the input end of the speed display board.

[0023] Furthermore, a PCB pressure plate sealing ring is installed in the third sealing groove on the hand pump body corresponding to the PCB pressure plate installation position. The PCB pressure plate sealing ring uniformly fills the gap between the PCB pressure plate and the hand pump body through a fixed pressing force, thereby sealing the PCB installation 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 display light, thereby forming a second sealed cavity in the hand pump body.

[0024] Furthermore, a hand pump rear cover is assembled at the bottom of the hand pump body, and a rear cover sealing ring is provided between the hand pump rear cover and the hand pump body to form a second sealed cavity in the hand pump body.

[0025] The embodiment of the present application provides a hand-cranked drive device for a blood pump, which utilizes a hand-cranked component to input manual power, and inside the hand-cranked pump body, a first torque transmission component and a second torque transmission component realize torque transmission direction change through a torque transmission direction change component, and finally converts the human-driven input into high-speed rotation of the rotor disk component, which can drive the external pump head to rotate, and adopts a purely mechanical structure transmission, so that the device is safe and reliable to use and has a long service life; when outdoors or when the power is off, the pump drive device can achieve long-term power output through human drive; by optimizing the planetary gear transmission structure, in view of the technical difficulties of the planetary gear transmission in continuous operation torque in the existing technology, by optimizing the structure and operation of the planetary frame, The planetary gear structure reduces the size of the sun gear while ensuring structural strength, increasing the circumferential moment of inertia and transmission stability of the planetary gears during rotation. When the planetary gear transmission is activated, the huge moment of inertia effectively drives the gears to continue rotating, significantly reducing the holding torque of the planetary transmission, thereby significantly extending the single-person use time of the hand-cranked drive device. By optimizing the bevel gear structure, reducing the mass of the intermediate structure of the large bevel gear and increasing the structural weight around the bevel gear pitch circle, the moment of inertia of the large bevel gear during rotation can be greatly increased. The huge moment of inertia effectively drives the gears to continue rotating, significantly reducing the holding torque of the planetary transmission, thereby significantly extending the single-person use time of the hand-cranked drive device. By optimizing the assembly structure position of the one-way bearing, the axial impact load on the one-way bearing is reduced, and the service life of the one-way bearing is increased. Involute planetary transmissions are widely used as deceleration, speed increase and speed change transmission devices in existing mechanical hand-cranked drive devices. Planetary transmissions usually use several planetary gears to transmit loads simultaneously, split power and reasonably adopt internal meshing. Therefore, they have the following advantages: compact structure, small size, light weight, large transmission ratio range, high transmission efficiency, smooth operation, low noise, and the ability to synthesize and decompose motion. Because the transmission ratio range is very large, the starting torque of the planetary transmission is very large. When the transmission ratio is greater than 30, the transmission torque is very large, and hand-cranking will be very laborious. It is difficult for ordinary people to maintain a large torque for a long time. Therefore, drive devices using planetary transmission structures are rarely used in hand-cranked drive devices that require a long time. In addition, the embodiment of the present application uses an integrated input and output structure design to make the pump drive device small in size, light in weight, and easy to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0027] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall still fall within the scope of the technical contents disclosed herein.

[0028] Figure 1 A schematic diagram of the overall structure of a hand-cranked drive device for a blood pump provided in an embodiment of the present application;

[0029] Figure 2 A schematic diagram of the structure decomposition of a hand-cranked drive device for a blood pump provided in an embodiment of the present application;

[0030] Figure 3 A schematic top view of a hand-cranked drive device for a blood pump provided in an embodiment of the present application;

[0031] Figure 4 For example Figure 3 The AA cross-sectional schematic diagram of a hand-cranked drive device for a blood pump is shown;

[0032] Figure 5 For example Figure 3 The diagram shows a BB cross-section of a hand-cranked drive device for a blood pump.

[0033] In the figure: 100, hand pump body; 101, second sealing cavity; 102, quick-install fixing block; 103, third sealing groove; 104, hand pump back cover; 105, back cover sealing ring; 200, pump drive fixing seat assembly; 201, first sealing cavity; 300, rotor disk assembly; 400, hand crank assembly; 401, crank handle; 402, handle; 403, handle shaft; 404, handle shaft gasket; 500, first torque transmission assembly; 501, crank handle adapter shaft; 502, crank handle shaft; 503, one-way roller bearing; 504, second sealing groove; 505, adapter shaft sealing ring; 506, shaft retaining ring; 507, third bearing; 600, second torque transmission assembly; 601, Z6 gear shaft; 602, planetary transmission assembly; 603, Z1 gear shaft; 604, Z2 gear; 6 05, 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, bearing sleeve; 613, first bearing; 614, retaining ring for hole; 615, limit shaft; 616, bottom gear of second planetary carrier assembly; 700, torque transmission direction changing assembly; 701, Z7 bevel gear; 702, second bearing; 703, first washer; 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 DESCRIPTION

[0034] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0035] The main purpose of the embodiments of the present application is to manually crank the handle to make the drive device output power, thereby solving the technical problem that the existing electric drive method cannot provide power for a long time when the power supply equipment and battery-powered equipment are powered off or outdoors;

[0036] refer to Figures 1 to 3 The embodiment of the present application provides a hand-cranked drive device for a blood pump, 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 direction changing assembly 700.

[0037] The pump drive fixing seat assembly 200 is covered on the hand pump body 100 to form an accommodating cavity. The first torque transmission assembly 500 and the second torque transmission assembly 600 are arranged perpendicular to each other in the accommodating cavity and are connected by the torque transmission direction changing assembly 700. The rotor disk assembly 300 is assembled to the top of the second torque transmission assembly 600 and is located below the pump drive fixing seat assembly 200. The hand crank assembly 400 extends into the hand pump body 100 from the side and is connected to the outer end of the first torque transmission assembly 500.

[0038] The hand crank assembly 400 includes: a crank 401 and a handle 402, the handle 402 is connected to the outer end of the crank 401, the inner end of the crank 401 is equipped with a crank adapter shaft 501, and the square end of the crank adapter shaft 501 is inserted into the square hole on the inner end of the crank 401.

[0039] In the embodiment of the present application, 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 a hinge.

[0040] The first torque transmission component 500 includes: a crank adapter shaft 501, a one-way roller bearing 503, and a crank shaft 502; the crank adapter shaft 501 is externally connected to the hand crank component 400 for transmission, and the crank adapter shaft 501 is internally sleeved on the outside of the first end of the crank shaft 502, and the one-way roller bearing 503 is located on the inner side of the torque transmission direction changing component 700 and assembled on the second end of the crank shaft 502, and the crank shaft 502 is transmission connected to the inner ring of the one-way roller bearing 503 through a flat key.

[0041] The hand crank assembly 400 also includes: a handle shaft 403 and a handle shaft gasket 404. The handle shaft 403 passes through the center of the crank adapter shaft 501 and is inserted into the first end of the crank shaft 502 in the square hole at the inner end of the crank 401. The handle shaft gasket 404 is installed between the outer end of the handle shaft 403 and the crank 401.

[0042] In the embodiment of the present application, as described above, by optimizing the hand-cranked input shaft structure, the one-way roller bearing 503 is assembled to the inner side of the torque transmission direction-changing assembly 700. In this way, the load generated in the torque transmission is mainly borne by the crank adapter shaft 501, which greatly reduces the load force of the one-way roller bearing 503 and effectively protects the one-way roller bearing 503, preventing the one-way roller bearing 503 from being damaged due to excessive load force.

[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 is engaged 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 transmission is widely used as a deceleration, acceleration and speed-changing transmission device in existing mechanical hand-cranked drive devices.

[0045] refer to Figure 1 、 Figures 4 and 5 In the embodiment of the present application, 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 arranged in the gear hole in the middle of the Z3 gear 606, and the second planetary carrier assembly 605 and the first planetary carrier assembly 608 are respectively installed with the Z2 gear 604 and the Z5 gear 607. A limit shaft 615 is provided on 05 and the first planetary carrier assembly 608, the Z2 gear 604 and the Z5 gear 607 are both engaged with the internal teeth of the Z3 gear 606, the bottom gear 616 of the second planetary carrier assembly is inserted into the middle of the Z5 gear 607 and engaged with the Z5 gear 607, the Z1 gear at the lower end of the Z1 gear shaft 603 is inserted into the middle of the Z2 gear 604 and engaged with the Z2 gear 604, and the upper end of the Z6 gear shaft 601 is inserted into the middle of the first planetary carrier assembly 608.

[0046] 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 at the upper end of the hand pump body 100, and the middle raised opening of the output shaft end cover 610 is sleeved on the middle opening at the upper end of the hand pump body 100; 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 installed between the input shaft end cover 609 and the output shaft end cover 610, and 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.

[0047] In the embodiment of the present application, both the Z2 gear 604 and the Z5 gear 607 are three-gear combinations (3 gears). A stopper shaft 615 is provided on the second planetary carrier assembly 605 at each gear position relative to the Z2 gear 604. The stopper shaft 615 limits the position of the gears on the upper end of the second planetary carrier assembly 605. Similarly, a stopper shaft 615 is provided on the first planetary carrier assembly 608 at each gear position relative to the Z5 gear 607. The stopper shaft 615 limits the position of the gears on the upper end of the first planetary carrier assembly 608.

[0048] refer to Figure 4 and Figure 5 The pump drive fixing seat assembly 200 is covered on the top of the hand pump body 100, and the sealing ring at the bottom of the pump drive fixing seat assembly 200 is installed in the first sealing groove 611 on the upper periphery of the hand pump body 100, forming a first sealed cavity 201 between the pump drive fixing seat assembly 200 and the hand pump body 100, and the rotor disk assembly 300 is located in the first sealed cavity 201.

[0049] The torque transmission changing assembly 700 includes a Z7 bevel gear 701, which is mounted on the crank shaft 502. The inner side of the gear of the Z7 bevel gear 701 is connected to the outer ring of the one-way roller bearing 503, and the lower end gear of the Z6 gear shaft 601 is meshed with the upper side gear of the Z7 bevel gear 701.

[0050] In the embodiment of the present application, the torque transmission direction-changing assembly adopts bevel gear transmission, which is transmitted through the meshing of bevel teeth. It can be manually rotated from the side, driving the rotor disk assembly on the top front to rotate, thereby realizing flexible steering of human-driven torque.

[0051] A second bearing 702 is installed on the outside of the Z7 bevel gear 701, and a first washer 703 is installed on both sides of the second bearing 702; a third bearing 507 is installed on the outside of the one-way roller bearing 503, and a shaft retaining ring 506 is installed between the one-way roller bearing 503 and the inner side of the gear of the Z7 bevel gear 701.

[0052] In the embodiment of the present application, manual power input can be achieved by using a hand-cranked assembly. Inside the hand-cranked pump body, the first torque transmission assembly and the second torque transmission assembly realize torque transmission direction change through the torque transmission direction changing assembly, and the human-driven input is finally converted into high-speed rotation of the rotor disk assembly, which can drive the external pump head to rotate. The use of a purely mechanical structure transmission makes the device safe and reliable to use and has a long service life. Outdoors or when the power is off, long-term power output of the pump drive device can be achieved through human drive.

[0053] In addition, in the embodiment of the present application, the input and output integrated structure design makes the pump drive device small in size, light in weight, and easy to move.

[0054] In the embodiment of the present application, the internal gear transmission has a speed-increasing function, which can realize high-speed rotor disc rotation output by low-speed hand-cranking power input. Figure 2 and Figure 4 , the implementation of multi-stage gear transmission speed increase is described in detail below.

[0055] First-stage transmission speed increase: The transmission direction is transmitted from the meshing transmission of the Z7 bevel gear 701 to the Z6 gear shaft 601. Specifically, the number of gear shaft teeth of the Z7 bevel gear 701 is greater than the number of meshing gears of the Z6 gear shaft 601, thereby achieving the first-stage transmission speed increase.

[0056] Second-stage transmission speed increase: The torque is transmitted from the Z6 gear shaft 601 to the first planetary carrier assembly 608 through interference fit, and then from the Z5 gear 607 (3pcs gear) on the first planetary carrier assembly 608 through the engagement with the internal teeth of the Z3 gear 606 and the bottom gear 616 of the second planetary carrier assembly (where the Z3 gear 606 is a fixed gear), the torque is transmitted to the second planetary carrier assembly 605, thereby achieving the second-stage transmission speed increase.

[0057] Third-stage power transmission speed increase: The torque is transmitted to the Z1 gear shaft 603 by the Z2 gear 604 (3pcs gears) on the second planetary carrier assembly 605 through the engagement with 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), thereby achieving the third-stage transmission speed increase.

[0058] As described above, in the embodiment of the present application, low speed input and high speed smooth output are effectively achieved through multi-stage gear transmission speed increase such as bevel gears and planetary gears.

[0059] A quick-install fixing block 102 is provided on the side of the hand pump body 100 opposite to the crank handle 401 , and the quick-install fixing block 102 can be used to balance the weight of the entire device.

[0060] In an embodiment of the present application, a hand-cranked drive device for a blood pump also 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.

[0061] Furthermore, the Z8 gear 801 is sleeved on the part of the Z6 gear shaft 601 that passes through the lower end of the input shaft end cover 609, and a hole retaining ring 614 is provided between the first bearing 613 located at the bottom and the Z8 gear 801. The lower end of the input shaft end cover 609 is equipped with a motor mounting bracket 802, and the lower end of the motor mounting bracket 802 is equipped with a DC generator 806. The Z9 gear set 804 is installed to the lower end of the input shaft end cover 609 through the gear mounting shaft 803. One side of the Z9 gear set 804 is engaged with the Z8 gear 801, and the other side of the Z9 gear set 804 is engaged with the Z10 gear 805. The Z10 gear 805 is assembled on the drive shaft of the DC generator 806; the speed display board 808 is pressed onto the side of the hand pump body 100 adjacent to the crank handle 401 through the PCB pressing plate 807, and the voltage output end of the DC generator 806 is electrically connected to the input end of the speed display board 808.

[0062] A hand pump rear cover 104 is assembled at the bottom of the hand pump body 100 , and the crank shaft 502 is mounted on the hand pump rear cover 105 .

[0063] In the embodiment of the present application, as described above, in addition to forming a first sealed cavity 201 between the pump drive fixing seat assembly 200 and the hand pump body 100 for accommodating the rotor disc assembly 300, a second sealed cavity 101 is also formed in the hand pump body 100 for sealing and accommodating various components in the hand pump body 100. Figure 2 、 Figure 4 and Figure 5 The formation of the second sealed cavity 101 is described in detail below.

[0064] (1) The outer periphery of the output shaft end cover 610 is fixedly matched with the hand pump body 100. The hand pump body 100 is provided with an opening in the middle of the upper end. The raised opening in the middle of the output shaft end cover 610 is sleeved on the middle opening at the upper end of the hand pump body 100. 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 portion of the Z1 gear shaft 603 located inside the output shaft end cover 610 is sleeved with a bearing sleeve 612.

[0065] (2) A third sealing groove 504 is provided at the crank adapter shaft 501 corresponding to the crank port position on the side of the hand pump body 100 , and the third sealing groove 504 is filled with an adapter shaft sealing ring 505 .

[0066] (3) A PCB pressure plate sealing ring 809 is installed in the third 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 uniformly fills the gap between the PCB pressure plate 807 and the hand pump body 100 through a fixed pressing force, thereby sealing the PCB installation opening on the side of the hand pump body 100.

[0067] (4) A hand pump film 810 is pasted on the PCB pressing plate 807 to seal the opening of the speed display light of the PCB pressing plate 807.

[0068] (5) A rear cover sealing ring 105 is provided between the hand pump rear cover 104 and the hand pump body 100 .

[0069] In summary, the sealing structures (1) to (5) above form a second sealed cavity 101 within the hand pump body 100. The first sealed cavity 201 and the second sealed cavity 101 can achieve waterproof and dustproof functions, preventing the external environment 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, the overall IPX4 performance of the pump drive device is met. The internal use environment of the blood pump hand drive device disclosed in the above embodiment of the present application is isolated from the outside world, thereby improving the safety, reliability and service life of the pump drive device.

[0070] In the embodiments of this application, dry-coating each gear with a lubricating film eliminates the need for additional lubricating liquids or solid lubricants, addressing the increased starting torque caused by the lubricant and the risk of equipment damage and environmental pollution from lubricant leakage. By improving the lubrication method for gear meshing, the high starting torque caused by fixed grease is addressed, improving the transmission efficiency of planetary gears and effectively avoiding the risk of emergency equipment becoming unusable due to the complete solidification of solid grease after prolonged storage.

[0071] In the embodiments of the present 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.

[0072] refer to Figures 1 to 3 The working principle or usage method of the above-mentioned blood pump hand-cranked drive device disclosed in the embodiments of the present application is described in detail below.

[0073] First, the case where the crank is shaken clockwise is described. The crank 401 is shaken clockwise from the side through the handle 402. The crank 401 transmits the torque to the crank shaft 502 through the square end of the crank adapter shaft 501. The crank shaft 502 drives the inner ring of the one-way roller bearing 503 to rotate clockwise through the flat key. At this time, the inner ring of the one-way roller bearing 503 drives the outer ring to rotate at the same time. The outer ring of the one-way roller bearing 503 transmits the torque to the Z7 bevel gear 701 and changes the direction of the torque transmission. The Z7 bevel gear 701 transmits the torque to the Z6 gear shaft 601 by engaging with the Z6 gear shaft 601. The Z6 gear shaft 601 transmits the torque to the planetary transmission assembly 602 through an interference fit with the planetary transmission assembly 602. The planetary transmission assembly 602 transmits the torque to the Z1 gear shaft 603 through the meshing relationship between the planetary gears. The Z1 gear shaft 603 transmits the torque to the rotor disk assembly 300 through an interference fit with the rotor disk assembly 300. The rotor disk assembly 300 rotates and drives the external pump head to rotate on the pump drive fixing seat assembly 200 through magnetic coupling.

[0074] The planetary transmission assembly 602 transmits torque to the Z1 gear shaft 603 through the meshing relationship of the planetary gears, specifically including: the Z6 gear shaft 601 transmits torque to the first planetary carrier assembly 608 through interference fit with the first planetary carrier assembly 608, and the first planetary carrier assembly 608 drives the Z5 gear 607 to rotate as a whole around the center of the first planetary carrier assembly 608. The Z5 gear 607 is a three-gear combination (3pcs gears) and meshes with the internal teeth of the Z3 gear 606. Since the Z3 gear 606 is fixed, the Z5 gear 607 is driven by the first planetary carrier assembly 608, and the three gears of the Z5 gear 607 rotate around their respective centers. The Z5 gear 607 drives the second planetary carrier assembly 605 to rotate by meshing with the bottom gear 616 of the second planetary carrier assembly, and the second planetary carrier assembly 605 drives the Z2 gear 604 to rotate as a whole around the second planetary carrier assembly 605. Similarly, the Z2 gear 604 is a three-gear combination (3pcs gears) and meshes with the internal teeth of the Z3 gear 606. Since the Z3 gear 606 is fixed, the Z2 gear 604 is driven by the second planetary carrier assembly 605. The three gears of the Z2 gear 604 rotate around their respective centers, and the middle of the Z2 gear 604 transmits torque to the Z1 gear shaft 603 by meshing with the Z1 gear at the lower end of the Z1 gear shaft 603.

[0075] In the embodiment of the present application, the electric drive module is removed, and manual power input is converted into high-speed rotation of the rotor disc assembly, which is driven to rotate the external pump head through magnetic coupling. The entire transmission process adopts a purely mechanical structure transmission, which can withstand harsh external environmental conditions and solve the potential dangers of fire and explosion caused by improper battery storage, falling or external impact, short battery life and few cycles. It has the characteristics of strong reliability, maintenance-free and long service life. In addition, an integrated input and output structure design is realized to solve the safety hazards caused by improper battery charging and discharging and improper storage caused by the separation of the input battery module and the output pump assembly in the old technical solution. At the same time, the device is small in size and light in weight, easy to store and place, and ready for use at any time.

[0076] When the hand crank assembly 400 is cranked clockwise from the side of the hand pump body 100, the hand crank assembly 400 cooperates with the first torque transmission assembly 500, the second torque transmission assembly 600, and the torque transmission direction-changing assembly 700 to transmit the output torque to the rotor disk assembly 300. The rotor disk assembly 300 rotates and drives the external pump head to rotate on the pump drive fixing seat assembly 200 through magnetic coupling.

[0077] When the hand crank assembly 400 is shaken counterclockwise from the side of the hand pump body 100 , the hand crank assembly 400 cannot transmit the torque to the torque transmission direction changing assembly 700 through the first torque transmission assembly 500 , and cannot drive the rotor disk assembly 300 to rotate.

[0078] While the above process is being executed, when the handle is shaken clockwise, the Z6 gear shaft 601 transmits the torque to the Z8 gear 801 through the flat key, the Z8 gear 801 transmits the torque to the Z9 gear set 804 by meshing with the Z9 gear set 804, the Z9 gear set 804 transmits the torque to the Z10 gear 805 by meshing with the Z10 gear 805, the Z10 gear 805 drives the DC generator 806 to rotate by interference fit with the DC generator 806, and converts the current speed of the rotor disk assembly 300 into voltage, and then uses the converted voltage through the speed display panel 808 to light up the light corresponding to the current speed of the rotor disk assembly 300.

[0079] In the embodiment of the present application, the function of displaying the current speed is realized by the above-mentioned speed display component.

[0080] When the crank is shaken counterclockwise, the crank 401 is shaken counterclockwise from the side through the handle 402, and the crank 401 transmits the torque to the crank shaft 502 through the square end of the crank adapter shaft 501. The crank shaft 502 drives the inner ring of the one-way roller bearing 503 to rotate counterclockwise through the flat key. At this time, the inner ring of the one-way roller bearing 503 is idling and cannot drive the outer ring to rotate at the same time. The torque cannot be transmitted to the Z7 bevel gear 701 and the rotor disk assembly 300 cannot be driven to rotate.

[0081] In this embodiment, a one-way roller bearing serves as a one-way connector, enabling unidirectional torque transmission. Clockwise rotation of the handle transmits torque, driving the rotor disc assembly to rotate clockwise. Counterclockwise rotation of the handle transmits no torque to the rotor disc assembly, resulting in no rotational output. This achieves the requirement that the pump drive device can transmit torque in the positive direction while idling in the reverse direction, thus avoiding the safety hazards associated with reverse rotation of the pump drive device.

[0082] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made thereto. Therefore, any such modifications and improvements made without departing from the spirit of the present invention are intended to be protected by the present invention.

Claims

1. A hand-cranked drive device for a blood pump, characterized in that: The device comprises: a hand-cranked pump body, a pump drive fixing seat assembly, a rotor disc assembly, a hand-cranked assembly, a planetary transmission assembly, a first torque transmission assembly, a second torque transmission assembly and a torque transmission direction changing assembly; The pump drive fixing seat assembly cover is mounted on the hand pump body to form an accommodating cavity. The first torque transmission assembly and the second torque transmission assembly are arranged perpendicular to each other in the accommodating cavity and are connected in direction-changing transmission through the torque transmission direction-changing assembly. The rotor disk assembly is assembled to the top of the second torque transmission assembly and is located below the pump drive fixing seat assembly. The hand crank assembly extends into the hand pump body from the side and is in transmission connection with the outer end of the first torque transmission assembly. The planetary transmission assembly includes: a Z2 gear, a second planetary carrier assembly, a Z3 gear, a Z5 gear, and a first planetary carrier assembly; the second planetary carrier assembly and the first planetary carrier assembly are arranged in the gear hole in the middle of the Z3 gear, the Z2 gear and the Z5 gear are respectively installed on the second planetary carrier assembly and the first planetary carrier assembly, and the second planetary carrier assembly and the first planetary carrier assembly are both provided with a limiting shaft, the Z2 gear and the Z5 gear are both engaged 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 engaged with the Z5 gear, the Z1 gear at the lower end of the Z1 gear shaft is inserted into the middle of the Z2 gear and engaged with the Z2 gear, and the upper end of the Z6 gear shaft is inserted into the middle of the first planetary carrier assembly.

2. A blood pump hand-cranked drive device according to claim 1, characterized in that: The planetary transmission assembly also includes: an input shaft end cover and an output shaft end cover, the output shaft end cover is installed on the upper end of the hand pump body, and the middle raised opening of the output shaft end cover is sleeved on the middle opening of the upper end of the hand pump body; 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, and 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.

3. A hand-cranked drive device for a blood pump according to claim 1, characterized in that: The first torque transmission component includes: a crank adapter shaft, a crank shaft, and a one-way roller bearing; the crank adapter shaft is externally connected to the hand crank component for transmission, and the crank adapter shaft is internally sleeved on the outside of the first end of the crank shaft. The one-way roller bearing is located on the inner side of the torque transmission direction-changing component and assembled on the second end of the crank shaft. The crank shaft is transmission-connected to the inner ring of the one-way roller bearing through a flat key.

4. A blood pump hand-cranked drive device according to claim 1, characterized in that: The second torque transmission assembly includes: a Z6 gear shaft 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 Z1 gear at the lower end of the Z1 gear shaft is engaged with the gear at the upper end of the planetary transmission assembly, and the upper end of the Z1 gear shaft is inserted into the bottom hole of the rotor disk assembly.

5. The hand-cranked drive device for a blood pump according to claim 1, characterized in that: The torque transmission direction-changing component includes: Z7 bevel gear, which is mounted on a one-way roller bearing. The inner side of the gear of Z7 bevel gear is connected to the outer ring of the one-way roller bearing, and the lower end gear of the Z6 gear shaft is meshed with the upper side gear of the Z7 bevel gear.

6. A hand-cranked drive device for a blood pump according to claim 1, characterized in that: The pump drive fixing seat assembly cover is installed on the top of the hand pump body. The sealing ring at the bottom of the pump drive fixing seat assembly is installed in the first sealing groove on the upper periphery of the hand pump body. A first sealed cavity is formed between the pump drive fixing seat assembly and the hand pump body, and the rotor disk assembly is located in the first sealed cavity.

7. A hand-cranked drive device for a blood pump according to claim 1, characterized in that: The outer periphery of the output shaft end cover is fixedly matched with the hand pump body to form a second sealed cavity in the hand pump body.

8. A hand-cranked drive device for a blood pump according to claim 1, characterized in that: A second bearing is installed on the outer side of the Z7 bevel gear, and a first washer is installed on both sides of the second bearing; a third bearing is installed on the outer side of the one-way roller bearing, and a shaft retaining ring is installed between the one-way roller bearing and the inner side of the gear of the Z7 bevel gear.

9. A hand-cranked drive device for a blood pump according to claim 1, characterized in that: The hand crank assembly includes: a crank handle, a folding handle, a handle shaft and a handle shaft gasket. The folding handle is connected to the outer end of the crank handle, and the inner end of the crank handle is equipped with a crank adapter shaft. The square end of the crank 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 adapter shaft in the square hole at the inner end of the crank handle and is inserted to the first end of the crank shaft. The handle shaft gasket is installed between the outer end of the handle shaft and the crank handle.

10. A hand-cranked driving device for a blood pump according to any one of claims 1 to 9, characterized in that: The device also includes: a speed display component, which includes: a Z8 gear, a motor mounting frame, a gear mounting shaft, a Z9 gear set, a Z10 gear, a generator, a PCB pressure plate, and a speed display board; the Z8 gear is sleeved on the part of the Z6 gear shaft that passes through the lower end of the input shaft end cover, the lower end of the input shaft end cover is equipped with a motor mounting frame, the lower end of the motor mounting frame is equipped with a 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 is engaged with the Z8 gear, and the other side of the Z9 gear set is engaged with the Z10 gear, and the Z10 gear is assembled to the drive shaft of the generator; the speed display board is pressed onto the side of the hand pump body adjacent to the crank handle through the PCB pressure plate, and the voltage output end of the generator is electrically connected to the input end of the speed display board.

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