Vibration and noise reduction structure of ECMO driving mechanism

Abstract

The invention relates to an ECMO driving mechanism, belongs to the technical field of medical instruments, and solves the problem of loud vibration sound during working of existing ECMO equipment. The ECMO driving mechanism comprises a driving mechanism mounting plate, a manual and electric integrated driving mechanism, a damping component, a manual driving crank and a connecting shaft. According to the ECMO driving mechanism, the structure of the annular shock pad is improved, the annular shock pad is composed of the multiple basic units, each basic unit is composed of eight same rod bodies, one ends of the rod bodies are located in the center of the cube, the other ends of the rod bodies are located at the eight vertexes of the cube, and the basic units have high specific strength and fundamental frequency; the high specific strength enables the structure to bear larger load with light weight, the high fundamental frequency enables the structure to be free of resonance, so that the effects of shock absorption and noise reduction are achieved, the effects of energy absorption, shock absorption and buffering are achieved, and the structure is suitable for medical scenes with strict requirements for environmental noise.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an ECMO drive mechanism. Background Art

[0002] Extracorporeal membrane oxygenation, abbreviated as ECMO, is an important technology that uses ECMO equipment to provide life support for critically ill patients with lost cardiopulmonary function. It can provide long-term cardiopulmonary support for patients with severe cardiopulmonary failure and win precious time for the rescue of critically ill patients.

[0003] This equipment plays an important role in treating circulatory failure, respiratory failure, assisting patients in cardiopulmonary resuscitation, etc. ECMO mainly consists of two key parts: a membrane lung and a blood pump. Among them, the vibration reduction and noise reduction of the blood pump drive mechanism are the key points and difficulties in the structural design of ECMO products. An ECMO device with small vibration and low noise is a key performance indicator for measuring the quality of ECMO products.

[0004] In recent years, the localization of ECMO equipment has developed rapidly. Many institutions have successively developed ECMO functional prototypes, but there is little research on the vibration reduction and noise reduction of the ECMO drive mechanism. This direction is not only the only way for the development of high-performance domestic ECMO equipment but also an urgent need in the field of ECMO research. Summary of the Invention

[0005] In view of the above analysis, the embodiments of the present invention aim to provide an ECMO drive mechanism to solve the problem of how to reduce the vibration of ECMO equipment proposed in the background art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An ECMO drive mechanism includes a drive mechanism mounting plate, a manual and electric integrated drive mechanism, a shock-absorbing member, a manual drive crank, and a connecting shaft.

[0008] Further, the shock-absorbing member includes an annular shock pad, a fixing screw, and a locking threaded member; a first mounting hole is provided in the drive mechanism mounting plate, the annular shock pad corresponding to the position of the first mounting hole is provided on the upper side of the drive mechanism mounting plate, the manual and electric integrated drive mechanism is installed above the annular shock pad, the manual and electric integrated drive mechanism is provided with a second mounting hole corresponding to the annular portion of the annular shock pad, the fixing screw passes through the second mounting hole and the first mounting hole, and the fixing screw is threadedly connected with the locking threaded member.

[0009] Further, a connecting shaft is installed on one side of the manual and electric integrated drive mechanism, and a manual drive crank is provided at the end of the connecting shaft.

[0010] Further, the annular shock pad is formed by a plurality of basic units and the annular shock pad is in an annular structure.

[0011] Further, the annular shock pad is integrally formed by 3D printing.

[0012] Further, the material of the annular shock pad is rubber.

[0013] Further, the basic unit is composed of 8 rod bodies. One end points of the 8 rod bodies form 8 vertices of a cube, and the other ends of the 8 rod bodies are located at the center of the cube.

[0014] Further, the length of the rod body is The diameter of the rod body is 0.12 mm.

[0015] Further, the annular shock pad is formed by stacking 10 times after 60 basic units are evenly distributed in a ring.

[0016] Further, the basic unit is additively manufactured by selective laser melting (SLM).

[0017] Further, the side length of the cube is 2 mm, the radius R of the rod body is 0.06 mm, and the included angle between adjacent rod bodies degrees.

[0018] Further, the gaps of the basic unit are connected by laser melting in the annular direction.

[0019] Further, the gaps of the basic unit are connected by laser melting during stacking.

[0020] Further, the inner diameter D1 of the annular shock pad is 56.86 mm, and the outer diameter D2 of the annular shock pad is 72 mm.

[0021] Further, the shock-absorbing member includes a primary shock-absorbing assembly and a secondary shock-absorbing and resetting assembly, and 4 of the primary shock-absorbing assemblies are connected to the secondary shock-absorbing and resetting assembly.

[0022] Further, the primary shock-absorbing assembly includes a first ball socket, a first universal ball, a bidirectional screw, and a nut; the 2 first universal balls distributed up and down are connected by the bidirectional screw, screw rods for fixing the first universal balls are installed at the upper and lower ends of the bidirectional screw, and a first ball socket is rotatably connected to the outside of the first universal ball.

[0023] Further, the first universal ball is composed of basic units.

[0024] Further, the diameter of the spherical structure with a cylindrical channel is 180 mm, and the cross-sectional diameter of the cylindrical channel is 40 mm.

[0025] Furthermore, the first universal ball is additively manufactured by selective laser melting (SLM), and the surface of the first universal ball is polished.

[0026] Furthermore, the primary shock-absorbing assembly further includes a mounting connecting plate for connecting with the manual-electric integrated driving mechanism.

[0027] Furthermore, the secondary shock-absorbing and resetting assembly includes a universal ball positioning block, a second universal ball, and a telescopic rod; the universal ball positioning block includes 8 universal ball rotating grooves, and the second universal balls are installed in the universal ball rotating grooves. One end of the telescopic rod is fixedly connected to the second universal ball, and the other ends of the 8 telescopic rods are connected to the 8 first ball sleeves through hooks.

[0028] Furthermore, the telescopic rod includes a first rod body, a telescopic spring, and a first sleeve rod; the two ends of the telescopic spring are respectively connected to the first rod body and the first sleeve rod, and the first rod body is sleeved inside the first sleeve rod.

[0029] At least one of the above technical solutions has the following beneficial effects:

[0030] (1) By improving the structure of the annular shock-absorbing pad, the ECMO driving mechanism of the present invention consists of multiple basic units. Each basic unit is composed of 8 identical rod bodies with one end located at the center of a cube and the other ends respectively located at the 8 vertices of the cube. This basic unit has a high specific strength and fundamental frequency. The high specific strength enables the structure to carry a greater load with a lighter mass, and the high fundamental frequency can prevent the structure from resonance, thereby achieving the effects of shock absorption and noise reduction. When the annular shock-absorbing pad is under a large load condition, the large pores of the annular shock-absorbing pad can convert the received energy into mechanical deformation potential energy, achieving the effects of energy absorption, shock absorption, and buffering, and is suitable for medical scenarios with strict requirements for environmental noise.

[0031] (2) The annular pad of the ECMO driving mechanism of the present invention is located between the driving mechanism mounting plate and the manual-electric control integrated driving mechanism, realizing the flexible connection between the driving mechanism mounting plate and the manual-electric control integrated driving mechanism. When the manual-electric control integrated driving mechanism is working, it effectively reduces the vibration noise generated by the operation of the manual-electric control integrated driving mechanism and does not affect the normal rest of the patient during the operation of the device.

[0032] (3) The annular pad of the ECMO driving mechanism of the present invention is additively manufactured by selective laser melting (SLM), which can meet the accuracy requirements of the basic unit of the annular shock-absorbing pad and can efficiently utilize raw materials.

[0033] In the present invention, the above technical solutions can also be combined with each other to achieve more preferred combined solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can be made obvious from the description or understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained from the content specifically pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings are only for the purpose of showing specific embodiments and are not considered as a limitation of the present invention. Throughout the drawings, the same reference signs denote the same components.

[0035] Figure 1 It is a schematic structural diagram of an ECMO driving mechanism of the present invention.

[0036] Figure 2 It is a schematic structural diagram of an annular shock pad of an ECMO driving mechanism of the present invention.

[0037] Figure 3 It is a schematic structural diagram of a basic unit of an ECMO driving mechanism of the present invention.

[0038] Figure 4 It is a schematic structural diagram of 60 basic units of an ECMO driving mechanism of the present invention evenly distributed in a ring.

[0039] Figure 5 It is one of the schematic structural diagrams of 10 stacked 60 basic units of an ECMO driving mechanism of the present invention evenly distributed in a ring.

[0040] Figure 6 It is a stress-strain comparison broken line graph of the annular shock pad of the present invention and a traditional rubber pad.

[0041] Figure 7 It is a schematic structural diagram of a shock-absorbing member of Embodiment 4 of the present invention.

[0042] Figure 8 It is Figure 7 an enlarged view of part A in

[0043] Figure 9 It is Figure 7 an enlarged view of part B in

[0044] Figure 10 It is a schematic structural diagram of a universal ball positioning block of Embodiment 4 of the present invention.

[0045] Figure 11 It is a cross-sectional view of a telescopic rod of Embodiment 4 of the present invention.

[0046] Figure 12 It is Figure 11 an enlarged view of part C in

[0047] Figure 13 This is a cross-sectional view of the primary shock-absorbing assembly of Embodiment 4 of the present invention.

[0048] Reference numerals:

[0049] 1. Driving mechanism mounting plate, 2. Manual and electric integrated driving mechanism, 3. Annular shock pad, 4. Fixing screw, 5. Locking threaded member, 6. Manual driving crank, 7. Connecting shaft;

[0050] 31. Base unit, 311. Rod body;

[0051] 81. Primary shock-absorbing assembly, 82. Secondary shock-absorbing and reset assembly;

[0052] 811. First ball socket, 812. First universal ball, 813. Bidirectional screw, 814. Nut, 815. Mounting connection plate;

[0053] 821. Universal ball positioning block, 822. Second universal ball, 823. Telescopic rod;

[0054] 8231. First rod body, 8232. Telescopic spring, 8233. First sleeve rod. Detailed implementation manners

[0055] The following will specifically describe the preferred embodiments of the present invention with reference to the accompanying drawings. The accompanying drawings form a part of this application and are used together with the embodiments of the present invention to explain the principles of the present invention, rather than to limit the scope of the present invention.

[0056] Embodiment 1

[0057] A specific embodiment of the present invention discloses an ECMO driving mechanism, as Figure 1 shown, including a driving mechanism mounting plate 1, a manual and electric integrated driving mechanism 2, a manual driving crank 6 and a connecting shaft 7.

[0058] Preferably, the shock-absorbing member includes an annular shock pad 3, a fixing screw 4 and a locking threaded member 5; a first mounting hole is provided in the driving mechanism mounting plate 1, the annular shock pad 3 corresponding to the position of the first mounting hole is provided on the upper side of the driving mechanism mounting plate 1, the manual and electric integrated driving mechanism 2 is installed above the annular shock pad 3, the second mounting hole of the manual and electric integrated driving mechanism 2 corresponds to the hole of the annular shock pad 3, the fixing screw 4 passes through the second mounting hole and the first mounting hole, and the fixing screw 4 is threadedly connected with a locking threaded member 5.

[0059] Drive mechanism mounting plate 1: It is the basis of the entire ECMO drive mechanism, used to fix and support other components. By installing the drive mechanism mounting plate 1 in the appropriate position, the stable operation of the entire ECMO drive mechanism can be ensured.

[0060] Manual-electric integrated drive mechanism 2: This drive mechanism combines manual and electric operation modes, which is convenient for the automatic operation of the equipment and can also be manually intervened and controlled.

[0061] Annular shock pad 3: The annular shock pad 3 can effectively reduce the vibration generated during the operation of the drive mechanism, reduce noise, and improve the service life of the equipment.

[0062] Fixing screw 4 and locking thread member 5: The fixing screw 4 and the locking thread member 5 cooperate with each other to effectively prevent the drive mechanism from loosening during use and improve the safety of the equipment.

[0063] This ECMO drive mechanism has the characteristics of stable structure, flexible operation, noise reduction and shock absorption, and safety and reliability.

[0064] Preferably, a connecting shaft 7 is installed on one side of the manual-electric integrated drive mechanism 2, and a manual drive crank 6 is provided at the end of the connecting shaft 7.

[0065] Embodiment 2

[0066] As Figure 2 shown, in this embodiment, the structure of the annular shock pad 3 is improved, and the annular shock pad 3 is a ring structure formed by rotational array of basic units 31.

[0067] Preferably, the annular shock pad 3 is integrally formed by 3D printing. The 3D printing technology can realize the manufacture of complex shapes and has high precision and repeatability. By integrally forming by 3D printing, the structural integrity and stability of the annular shock pad 3 can be ensured.

[0068] Preferably, the material of the annular shock pad 3 is rubber. Rubber has good elasticity and shock absorption performance and can effectively absorb and disperse vibration energy. The annular shock pad 3 made of rubber material can provide better shock absorption effect and protect other components from vibration.

[0069] Preferably, as Figure 3 shown, the basic unit 31 is composed of 8 rod bodies 311. One ends of the 8 rod bodies 311 are located at the center point of the cube, and the other ends of the 8 rod bodies 311 are respectively located at 8 vertices of the cube.

[0070] The basic unit 31 has symmetry, that is, it is both a centrosymmetric structure and a plane-symmetric structure. This structural design enables the basic unit 31 to perform relative movement when subjected to vibration, thereby enhancing the shock absorption effect of the annular shock pad 3. At the same time, this structure also provides good support and stability, enabling the annular shock pad 3 to withstand greater pressure and load.

[0071] Preferably, the basic unit 31 is additively manufactured by selective laser melting (SLM).

[0072] Preferably, the included angle α between adjacent rod bodies 311 is = degrees.

[0073] Preferably, the basic unit 31 connects the voids by laser melting in the annular direction.

[0074] Preferably, the basic unit 31 connects the voids by laser melting when stacked.

[0075] Embodiment 3

[0076] This embodiment further optimizes the structure of the basic unit 31 on the basis of Embodiment 2, as Figure 4 shown, the length of the rod body 311 is mm, and the diameter of the rod body 311 is 0.12 mm.

[0077] The basic unit 31 formed by the dimensions of the rod body 311 has a porosity of 80%, and has outstanding performance in aspects such as shock absorption, high energy absorption efficiency, light weight, and high strength.

[0078] Preferably, as Figure 5 shown, the annular shock pad 3 is formed by stacking 60 basic units 31 evenly distributed in a ring for 10 times.

[0079] The side length of the cube is 2 mm, and the radius R of the rod body 311 is 0.06 mm.

[0080] Preferably, the inner diameter D1 of the annular shock pad 3 is 56.86 mm, and the outer diameter D2 of the annular shock pad 3 is 72 mm.

[0081] Compared with traditional rubber shock-absorbing materials, the stress-strain curve of the annular shock pad 3 in this embodiment is as Figure 6 shown under the condition of the same mass and inner and outer diameters.

[0082] Figure 6 In, strain represents stress, and the unit is Mpa.

[0083] Figure 6 In, stress represents strain.

[0084] S1 represents the stress-strain curve of the annular shock-absorbing rubber pad in this embodiment, and S2 represents the stress-strain curve of the rubber pad made of traditional rubber material.

[0085] According to Figure 6 the stress-strain curve in, the stress of S1 is significantly higher than that of S2 under the same strain. It can be seen that the force it can bear under the same mass is significantly greater than that of traditional rubber materials. It can be analyzed that the annular shock-absorbing pad 3 in this embodiment has the advantage of high specific strength.

[0086] Example 4

[0087] In this embodiment, the shock-absorbing component of Example 1 is replaced to reduce the vibration received by the manual and electric integrated drive mechanism 2. The structure of the shock-absorbing component is as Figure 7 shown. The shock-absorbing component includes a primary shock-absorbing assembly 81 and a secondary shock-absorbing and resetting assembly 82. Four of the primary shock-absorbing assemblies 81 are connected to the secondary shock-absorbing and resetting assembly 82.

[0088] Preferably, as Figure 9 and Figure 13 shown, the primary shock-absorbing assembly 81 includes a first ball socket 811, a first universal ball 812, a bidirectional screw 813 and a nut 814; the two first universal balls 812 distributed up and down are connected by the bidirectional screw 813. Screws for fixing the first universal ball 812 are installed at both the upper and lower ends of the bidirectional screw 813. The first ball socket 811 is rotatably connected to the outside of the first universal ball 812.

[0089] The first universal ball 812 of the primary shock-absorbing assembly 81 is formed by an array of basic units 31 with shock-absorbing functions. Since the basic unit 31 has shock-absorbing functions, the spherical structure of the first universal ball 812 has the function of multi-directional shock absorption and can slow down the vibration in any direction. At the same time, the bidirectional screw 813 of the primary shock-absorbing assembly 81 can move in the opposite direction of the force under the left and right of the first universal ball 812 and the first ball socket 811. Therefore, it can relieve the huge vibration generated by sudden impact.

[0090] Preferably, the first universal ball 812 is composed of the basic unit 31.

[0091] Preferably, the diameter of the spherical structure with a cylindrical channel is 180 mm, and the cross-sectional diameter of the cylindrical channel is 40 mm.

[0092] Preferably, the first universal ball 812 is additively manufactured by selective laser melting (SLM), and the surface of the first universal ball 812 is polished.

[0093] Preferably, the primary shock absorption assembly 81 further includes a mounting connecting plate 815 for connecting with the manual and electric integrated driving mechanism 2.

[0094] Preferably, as Figure 8 and Figure 10 shown, the secondary shock absorption and reset assembly 82 includes a universal ball positioning block 821, a second universal ball 822, and a telescopic rod 823; the universal ball positioning block 821 includes 8 universal ball rotating grooves, and the second universal balls 822 are installed in the universal ball rotating grooves. One end of the telescopic rod 823 is fixedly connected to the second universal ball 822, and the other ends of the 8 telescopic rods 823 are connected to the 8 first ball sleeves 811 through hooks.

[0095] The secondary shock absorption function of the secondary shock absorption and reset assembly 82 is realized by the telescopic rod 823. When the bidirectional screw 813 of the primary shock absorption assembly 81 is offset, a part of the telescopic springs 8232 in the 8 telescopic rods are stretched for shock absorption, and the other part is compressed for shock absorption. At the same time, under the action of the telescopic spring 8232, the bidirectional screw 813 can be quickly reset, reducing the excessive shaking generated by the ECMO driving mechanism when receiving an impact.

[0096] The angular attitude changes, stretching and compression stroke changes of the 8 telescopic rods 823 are all independent, and they have good shock absorption performance when facing vibrations in different directions and types.

[0097] Preferably, as Figure 11 and Figure 12 shown, the telescopic rod 823 includes a first rod body 8231, a telescopic spring 8232, and a first sleeve rod 8233; both ends of the telescopic spring 8232 are respectively connected to the first rod body 8231 and the first sleeve rod 8233, and the first sleeve rod 8233 is sleeved with the first rod body 8231.

[0098] The telescopic spring 8232 can be compressed or stretched when receiving an impact force, thereby driving the relative movement between the first rod body 8231 and the first sleeve rod 8233 to achieve the purpose of shock absorption.

[0099] During the use of ECMO, there are many transfer situations, such as transferring from the hospital to the ambulance and from the operating room to the ICU. During the transfer process, large vibrations will occur when passing through slopes, sudden stops, etc., which may cause the ECMO driving mechanism to malfunction. Therefore, this embodiment is used to further enhance the seismic resistance of the ECMO driving mechanism.

[0100] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

[0101] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. An ECMO driving mechanism, characterized in that, It includes a drive mechanism mounting plate (1), a manual and electric integrated drive mechanism (2), a shock-absorbing member, a manual drive crank (6) and a connecting shaft (7).

2. The ECMO driving mechanism according to claim 1, characterized in that The shock-absorbing member includes an annular shock pad (3), fixing screws (4) and locking threaded members (5); a first mounting hole is provided in the drive mechanism mounting plate (1), and the annular shock pad (3) corresponding to the position of the first mounting hole is provided on the upper side of the drive mechanism mounting plate (1). The manual and electric integrated drive mechanism (2) is mounted above the annular shock pad (3). The manual and electric integrated drive mechanism (2) is provided with a second mounting hole opposite to the annular portion of the annular shock pad (3). The fixing screw (4) passes through the second mounting hole and the first mounting hole, and the fixing screw (4) is threadedly connected with the locking threaded member (5).

3. An ECMO driving mechanism according to claim 1, characterized in that, The connecting shaft (7) is mounted on one side of the manual and electric integrated drive mechanism (2), and the manual drive crank (6) is provided at the end of the connecting shaft (7).

4. The ECMO driving mechanism according to claim 2, characterized in that, The annular shock pad (3) is formed by a plurality of basic units (31) and the annular shock pad (3) is a ring structure.

5. An ECMO driving mechanism according to claim 2, characterized in that, The annular shock pad (3) is integrally formed by 3D printing.

6. An ECMO driving mechanism according to claim 2, characterized in that, The material of the annular shock pad (3) is rubber.

7. An ECMO driving mechanism according to claim 4, characterized in that, The basic unit (31) is composed of 8 rod bodies (311). One end points of the 8 rod bodies (311) form 8 vertices of a cube, and the other ends of the 8 rod bodies (311) are located at the center of the cube.

8. An ECMO driving mechanism according to claim 7, characterized in that The length of the rod body (311) is The diameter of the rod body (311) is 0.12 mm.

9. An ECMO driving mechanism according to claim 4, characterized in that, The annular shock pad (3) is formed by stacking 60 basic units (31) evenly distributed in a ring 10 times.

10. An ECMO driving mechanism according to claim 7, characterized in that, The side length of the cube is 2 mm, the radius R of the rod (311) is 0.06 mm, and the included angle between adjacent rods (311) degrees.

Images