A magnetic levitation low-friction dual-hub device suitable for heavy-duty medical equipment

Abstract

This utility model provides a magnetic levitation low-friction dual-hub device suitable for heavy-duty medical equipment, belonging to the technical field of hub devices. This magnetic levitation low-friction dual-hub device for heavy-duty medical equipment includes an outer load-bearing hub, an inner drive hub, radial ceramic bearings, and an axial magnetic levitation module. The outer load-bearing hub is sleeved on the outside of the inner drive hub. The radial ceramic bearings are disposed between the outer load-bearing hub and the inner drive hub, and are connected to the inner wall of the outer load-bearing hub and the outer wall of the inner drive hub, respectively. The axial magnetic levitation module is disposed at the end of the outer load-bearing hub away from the radial ceramic bearings, and is connected to the end of the outer load-bearing hub. This invention solves the problems of high friction coefficient, high movement resistance, heavy operating burden for medical personnel, and difficulty in meeting the frequent movement requirements of traditional heavy-duty medical equipment hub systems.

Description

Technical Field

[0001] This utility model belongs to the field of wheel hub device technology, specifically, it relates to a magnetic levitation low-friction double wheel hub device suitable for heavy medical equipment. Background Technology

[0002] In the medical field, heavy medical equipment such as G-arms, which need to carry a large number of precision testing instruments and support structures, typically weigh over 200 kg. They also require frequent movement during clinical use to adapt to different examination or treatment scenarios, such as adjusting their position in the operating room to obtain the optimal imaging angle, or transferring them between different departments to improve equipment utilization. The dual-hub system is a mobile support component designed for this type of heavy medical equipment. It consists of an external load-bearing hub and an internal drive hub. Through the coordinated operation of the inner and outer hubs, it can both support the enormous weight of the equipment and enable flexible movement, making it one of the key structures ensuring the normal operation of heavy medical equipment.

[0003] Traditional heavy-duty medical equipment hub systems often employ a single-hub structure, relying primarily on sliding friction for movement. The coefficient of sliding friction is typically greater than 0.08, resulting in high resistance to movement. During static startup, a thrust exceeding 50N is often required to move the equipment, placing a heavy operational burden on medical staff. This not only leads to excessive physical exertion but may also affect the equipment's movement efficiency due to insufficient thrust, delaying treatment time. Furthermore, the traditional single-hub structure is prone to severe component wear due to significant frictional losses over long-term use. This increases maintenance costs and replacement frequency, and may also cause hub instability and significant operating noise, affecting the quietness of the medical environment. In addition, the low rigidity of traditional hub structures makes them susceptible to deformation when bearing heavy equipment, further exacerbating frictional resistance and component wear, making it difficult to meet the requirements of frequent, stable, and low-resistance movement of heavy-duty medical equipment. Utility Model Content

[0004] In view of this, the present invention provides a magnetic levitation low-friction dual-hub device suitable for heavy medical equipment, which solves the problems of high friction coefficient, high movement resistance, heavy operating burden for medical staff, and difficulty in meeting the frequent movement needs of traditional heavy medical equipment hub systems.

[0005] This utility model is implemented as follows:

[0006] This utility model provides a magnetic levitation low-friction dual-hub device suitable for heavy-duty medical equipment, comprising an outer load-bearing hub, an inner drive hub, radial ceramic bearings, and an axial magnetic levitation module. The outer load-bearing hub is sleeved on the outside of the inner drive hub, and the radial ceramic bearings are disposed between the outer load-bearing hub and the inner drive hub, respectively connected to the inner sidewall of the outer load-bearing hub and the outer sidewall of the inner drive hub. The axial magnetic levitation module is disposed at the end of the outer load-bearing hub away from the radial ceramic bearings, and the axial magnetic levitation module is connected to the end of the outer load-bearing hub.

[0007] The technical advantages of this invention, which provides a magnetic levitation low-friction dual-hub device suitable for heavy-duty medical equipment, are as follows: By fitting an outer load-bearing hub around the outer side of an inner drive hub, a radial ceramic bearing connects the two and bears the static gravity load. An axial magnetic levitation module is positioned at the end of the outer load-bearing hub to dynamically counteract lateral friction, forming a structure where the two hubs work together. This layout enables the device to simultaneously possess high load-bearing capacity and low friction characteristics. The nested structure of the outer load-bearing hub and the inner drive hub enhances overall rigidity, and the cooperation between the radial ceramic bearing and the axial magnetic levitation module significantly reduces the coefficient of friction, making the movement of heavy-duty medical equipment (such as G-arms) easier and solving the problem of high movement resistance in traditional single-hub systems.

[0008] Based on the above technical solution, the magnetic levitation low-friction double-hub device of this utility model suitable for heavy medical equipment can be further improved as follows:

[0009] The axial magnetic levitation module includes multiple permanent magnets, which are arranged in a ring shape along the circumference and a soft magnetic pad is provided between two adjacent permanent magnets.

[0010] The beneficial effects of adopting the above-mentioned improved scheme are as follows: In the axial magnetic levitation module, multiple permanent magnets are arranged in a ring structure along the circumference. The soft magnetic pads between adjacent permanent magnets can reduce magnetic leakage and enhance the magnetic focusing effect of the module. The ring layout makes the magnetic levitation force evenly distributed along the circumference, avoiding frictional fluctuations caused by uneven local force. Combined with the magnetic guiding effect of the soft magnetic pads, the stability of the axial levitation force is improved, further reducing the lateral resistance when the equipment moves.

[0011] Furthermore, the permanent magnets adopt a Heilbeck array layout, and along the arrangement direction of the permanent magnets, the magnetization direction of each permanent magnet is set at a preset angle.

[0012] In the Halbach array layout, along the circumferential arrangement of the permanent magnets, the magnetization directions of adjacent permanent magnets are staggered at 90° angles, forming a gradient distribution of magnetic field strength that increases unidirectionally in the radial direction and decreases on the other side. Specifically, the first permanent magnet is magnetized radially outward, the next adjacent permanent magnet is magnetized circumferentially clockwise (or counterclockwise), the next permanent magnet is magnetized radially inward, and subsequent permanent magnets are magnetized circumferentially counterclockwise (or clockwise), and so on in a cyclical arrangement. This significantly enhances the magnetic field strength on the side of the axial magnetic levitation module closer to the internal drive hub, while weakening the magnetic field strength on the side farther away.

[0013] Furthermore, the radial ceramic bearing includes an inner ring, an outer ring, and rolling elements. The inner ring is fixedly connected to the outer side wall of the inner drive hub, the outer ring is fixedly connected to the inner side wall of the outer load-bearing hub, and the rolling elements are disposed between the inner ring and the outer ring.

[0014] The inner ring is fixedly connected to the outer wall of the inner drive hub by an interference fit. The inner wall of the inner ring fits tightly to the outer wall of the inner drive hub, and the fixation is achieved by the radial pressure between the two to avoid relative slippage.

[0015] Fixed connection between the outer ring and the inner wall of the outer load-bearing hub: A tight fit axial positioning step is adopted. The inner wall of the outer load-bearing hub is provided with an annular step. One end of the outer ring abuts against the end face of the step. The outer wall of the outer ring is tightly fitted with the inner wall of the outer load-bearing hub. The axial displacement of the outer ring is restricted by the step, and the fixation is achieved by radial friction.

[0016] Furthermore, the inner wall of the external load-bearing hub is provided with an annular protrusion, and the outer ring of the radial ceramic bearing is in contact with the side of the annular protrusion.

[0017] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the annular protrusion on the inner wall of the external load-bearing hub fits snugly against the side of the outer ring of the radial ceramic bearing, forming an axial position by aligning the protrusion with the outer ring and preventing axial movement of the bearing during equipment movement. This structure improves the connection stability between the bearing and the external load-bearing hub, ensures uniform radial load transmission, reduces increased friction caused by vibration, and extends the service life of the device.

[0018] Furthermore, the outer wall of the internal drive hub is provided with an annular groove, and the inner ring of the radial ceramic bearing is embedded in the annular groove.

[0019] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the annular groove on the outer wall of the internal drive hub is used to embed the inner ring of the radial ceramic bearing. The groove aligns with the inner ring to form a radial limit, preventing relative rotation between the inner ring and the internal drive hub. This structure ensures that the inner ring moves synchronously with the internal drive hub, avoids additional resistance caused by sliding friction, improves the transmission efficiency of the bearing, and makes the equipment move more smoothly.

[0020] Furthermore, the shape of the soft magnetic pad is adapted to the side shape of the permanent magnet, one side of the soft magnetic pad is in contact with the side of a permanent magnet, and the other side of the soft magnetic pad is in contact with the side of another adjacent permanent magnet.

[0021] The permanent magnet has a fan-shaped block structure, with two radially extending planes (or arc-shaped surfaces that match the curvature of the circumference) on both sides along the circumference. The soft magnetic pad has the same shape as these sides. If the side of the permanent magnet is flat, the soft magnetic pad is a rectangular sheet; if the side of the permanent magnet is arc-shaped, the soft magnetic pad is an arc-shaped sheet with the same curvature. The soft magnetic pad has a uniform thickness and its edges are flush with the edges of the side of the permanent magnet, achieving a perfect fit.

[0022] Furthermore, the axial magnetic levitation module has an end cap on the side away from the external load-bearing hub. The end cap is fixedly connected to the end of the external load-bearing hub and covers the axial magnetic levitation module.

[0023] The end cap is a ring-shaped plate structure with multiple through holes along its circumference. The corresponding end of the external load-bearing hub has a threaded hole. By passing a bolt through the through hole of the end cap and screwing it into the threaded hole of the external load-bearing hub, the inner side of the end cap fits tightly with the end face of the external load-bearing hub, achieving a detachable and fixed connection.

[0024] Furthermore, the outer wall of the outer load-bearing hub is provided with reinforcing ribs extending along its axial direction, and multiple reinforcing ribs are spaced apart along the circumferential direction of the outer load-bearing hub.

[0025] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: multiple reinforcing ribs on the outer wall of the external load-bearing hub extend axially and are distributed at circumferential intervals, which can enhance the structural rigidity and deformation resistance of the hub. When bearing the weight of heavy medical equipment, the reinforcing ribs can disperse stress, reduce hub deformation, avoid changes in component fit clearance caused by deformation, and maintain the stability of low-friction characteristics.

[0026] Furthermore, the inner sidewall of the internal drive hub is provided with a keyway extending along its axial direction, and multiple keyways are spaced apart along the circumferential direction of the internal drive hub.

[0027] The beneficial effects of adopting the above-mentioned improved scheme are as follows: multiple keyways on the inner sidewall of the internal drive hub are arranged at circumferential intervals, which can be adapted and connected with the key structure on the drive shaft to achieve synchronous rotation of the internal drive hub and the drive shaft. The keyway connection ensures efficient power transmission, avoids the additional resistance caused by slippage, and enables the driving force of the internal drive hub to act stably on the movement of the equipment, thereby improving the response speed of the equipment movement.

[0028] Compared with existing technologies, the advantages of the magnetic levitation low-friction double-hub device for heavy-duty medical equipment provided by this utility model are:

[0029] In terms of frictional resistance, the axial levitation force is effectively enhanced by the Heilbeck array layout of permanent magnets in the axial magnetic levitation module and the setting of soft magnetic pads. Combined with the rolling friction characteristics of the radial ceramic bearing, the friction coefficient of the device is greatly reduced, which significantly reduces the resistance encountered by the equipment during movement. Medical staff only need a small pushing force to easily push heavy medical equipment, which greatly reduces the operating burden of medical staff and improves the convenience and efficiency of equipment movement.

[0030] In terms of structural stability and durability, the nested structure of the external load-bearing hub and the internal drive hub enhances the overall rigidity of the device, enabling it to stably bear the weight of heavy medical equipment. The fixed connection between the inner ring of the radial ceramic bearing and the internal drive hub, and the outer ring and the external load-bearing hub, ensures that the bearing will not slip or shift during load-bearing, guaranteeing its normal operation and service life. The end caps in the axial magnetic levitation module effectively prevent dust, moisture, and other impurities from entering the module, avoiding contamination that could reduce the magnetic performance of the permanent magnets and soft magnetic pads, thus ensuring the stability of the magnetic levitation effect.

[0031] In terms of operational stability and noise control, the ring-shaped arrangement of permanent magnets ensures that the axial magnetic levitation force is evenly distributed along the circumference, avoiding frictional fluctuations caused by uneven local force distribution. Combined with the rolling element structure of the radial ceramic bearings, this makes the equipment move more smoothly and steadily. At the same time, the low-friction characteristics reduce frictional losses between components, lowering noise levels during operation and providing a quieter environment for medical applications.

[0032] Furthermore, the keyway design on the inner wall of the internal drive hub ensures efficient power transmission with the drive shaft, preventing slippage and making the equipment's movement response more rapid. The reinforcing rib structure on the outer wall of the external load-bearing hub enhances the hub's resistance to deformation, further ensuring the stability and reliability of the device when bearing heavy equipment for extended periods. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 An example diagram of a magnetic levitation low-friction dual-hub device suitable for heavy-duty medical equipment;

[0035] Figure 2 A top view of a magnetic levitation low-friction dual-hub device suitable for heavy-duty medical equipment;

[0036] The attached diagram lists the components represented by each number as follows:

[0037] 10. External load-bearing hub; 20. Internal drive hub; 30. Radial ceramic bearing; 31. Inner ring; 32. Outer ring; 33. Rolling element; 40. Axial magnetic levitation module; 41. Permanent magnet. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0039] like Figure 1 , Figure 2 The diagram shown is an example of a magnetic levitation low-friction dual-hub device for heavy-duty medical equipment provided by this utility model. It includes an outer load-bearing hub 10, an inner drive hub 20, a radial ceramic bearing 30, and an axial magnetic levitation module 40. The outer load-bearing hub 10 is fitted onto the outside of the inner drive hub 20. The radial ceramic bearing 30 is disposed between the outer load-bearing hub 10 and the inner drive hub 20, and is connected to the inner wall of the outer load-bearing hub 10 and the outer wall of the inner drive hub 20, respectively. The axial magnetic levitation module 40 is disposed at the end of the outer load-bearing hub 10 away from the radial ceramic bearing 30, and is connected to the end of the outer load-bearing hub 10.

[0040] The internal drive hub is connected to the drive shaft of the medical device through a keyway on the inner side wall to ensure that the two rotate synchronously.

[0041] The external load-bearing hub is assembled with the internal drive hub through a radial ceramic bearing, so that the inner and outer rings of the radial ceramic bearing are fixed to the internal drive hub and the external load-bearing hub respectively, thus bearing the static gravity of the equipment.

[0042] The permanent magnets of the axial magnetic levitation module are arranged in a Halbach array, and soft magnetic pads are attached to the sides of the permanent magnets. The whole module is installed at the end of the external load-bearing hub and fixed and sealed by the end cap.

[0043] When the equipment needs to be moved, the drive shaft drives the internal drive hub to rotate, and the radial ceramic bearing reduces the friction between the inner and outer hubs through rolling elements.

[0044] The axial magnetic levitation module generates levitation force during equipment movement, dynamically offsetting lateral friction. Combined with the low friction characteristics of the radial ceramic bearing, this allows the equipment to move smoothly under low thrust.

[0045] In the above technical solution, the axial magnetic levitation module 40 includes multiple permanent magnets 41, which are arranged in sequence along the circumferential direction to form a ring structure, and a soft magnetic pad is provided between two adjacent permanent magnets 41.

[0046] Furthermore, in the above technical solution, the permanent magnet 41 adopts a Heilbeck array layout, and along the arrangement direction of the permanent magnet 41, the magnetization direction of each permanent magnet 41 is set at a preset angle.

[0047] Furthermore, in the above technical solution, the radial ceramic bearing 30 includes an inner ring 31, an outer ring 32, and a rolling element 33. The inner ring 31 is fixedly connected to the outer side wall of the inner drive hub 20, the outer ring is fixedly connected to the inner side wall of the outer load-bearing hub 10, and the rolling element 33 is disposed between the inner ring 31 and the outer ring 32.

[0048] Furthermore, in the above technical solution, the inner wall of the external load-bearing hub 10 is provided with an annular protrusion, and the outer ring 32 of the radial ceramic bearing 30 is in contact with the side of the annular protrusion.

[0049] Furthermore, in the above technical solution, the outer wall of the internal drive hub 20 is provided with an annular groove, and the inner ring 31 of the radial ceramic bearing 30 is embedded in the annular groove.

[0050] Furthermore, in the above technical solution, the shape of the soft magnetic pad is adapted to the side shape of the permanent magnet 41, one side of the soft magnetic pad is in contact with the side of one permanent magnet 41, and the other side of the soft magnetic pad is in contact with the side of another adjacent permanent magnet 41.

[0051] Furthermore, in the above technical solution, the axial magnetic levitation module 40 is provided with an end cover on the side away from the external load-bearing hub 10. The end cover is fixedly connected to the end of the external load-bearing hub 10 and covers the axial magnetic levitation module 40.

[0052] Furthermore, in the above technical solution, the outer side wall of the outer load-bearing hub 10 is provided with reinforcing ribs extending along its axial direction, and multiple reinforcing ribs are spaced apart along the circumferential direction of the outer load-bearing hub 10.

[0053] Furthermore, in the above technical solution, the inner sidewall of the internal drive hub 20 is provided with a keyway extending along its axial direction, and multiple keyways are spaced apart along the circumferential direction of the internal drive hub 20.

[0054] First embodiment:

[0055] This embodiment of the magnetic levitation low-friction dual-hub device for heavy-duty medical equipment includes an outer load-bearing hub, an inner drive hub, radial ceramic bearings, and an axial magnetic levitation module. The outer load-bearing hub is made of high-strength alloy material, and its inner sidewall has an annular protrusion. One end of the outer ring of the radial ceramic bearing abuts against the end face of the protrusion, and the outer sidewall of the outer ring is fixed to the inner sidewall of the outer load-bearing hub by a tight fit. The outer sidewall of the inner drive hub has an annular groove, and the inner ring of the radial ceramic bearing is embedded in the groove and fixed by an interference fit. The rolling elements are made of silicon nitride ceramic material to ensure wear resistance.

[0056] In the axial magnetic levitation module, the permanent magnets are fan-shaped block structures arranged in a ring along the circumference. Adjacent permanent magnets are arranged in a Halbach array: the first permanent magnet is magnetized radially outward, the second circumferentially clockwise, the third radially inward, and the fourth circumferentially counterclockwise, arranged in a cycle. The soft magnetic pads between the permanent magnets are fan-shaped thin sheets adapted to the sides of the permanent magnets, fitting tightly to reduce magnetic leakage. A metal end cap is located on the side of the axial magnetic levitation module away from the external load-bearing hub. The edge of the end cap is connected to the threaded hole at the end of the external load-bearing hub by bolts, forming a seal. The outer wall of the external load-bearing hub has four axially extending reinforcing ribs, and the inner wall of the internal drive hub has two symmetrically distributed keyways.

[0057] Applicable scenarios: Suitable for heavy medical equipment (such as conventional G-arms) with a weight of 200-500kg and a moderate frequency of movement, often used in relatively regular environments such as operating rooms.

[0058] Technical benefits: The combination of tight fit and interference fit ensures stable load bearing of the radial ceramic bearing; the combination of Halbach array and soft magnetic pad makes the axial suspension force uniform, the friction coefficient is reduced to about 0.02, the starting thrust is ≤20N, which meets the needs of medium frequency movement, the operating noise is low, and the structural stability is suitable for conventional medical environments.

[0059] Second embodiment: The device composition of this embodiment is basically the same as that of the first embodiment, except that: the outer load-bearing hub is made of carbon fiber reinforced composite material, the height of the annular protrusion on the inner sidewall is increased, and the outer ring of the radial ceramic bearing is fixed to the protrusion by welding to enhance the connection strength; the inner wall of the annular groove of the inner drive hub is provided with anti-slip texture, and the inner ring and the groove are double fixed by interference fit and anti-slip texture; the rolling element is made of zirconia ceramic material to improve impact resistance.

[0060] In the axial magnetic levitation module, the permanent magnets are arc-shaped block structures with a Halbach array layout: the first permanent magnet is magnetized radially outward, the second circumferentially counterclockwise, the third radially inward, and the fourth circumferentially clockwise, arranged in a cycle. The soft magnetic pads are arc-shaped thin sheets adapted to the sides of the arc-shaped permanent magnets, with the edges slightly extending 0.5mm beyond the sides of the permanent magnets to further reduce magnetic leakage. The end caps are made of lightweight alloy material and are connected to the end of the external load-bearing hub via snap-fit ​​connections, facilitating quick disassembly and maintenance. The outer wall of the external load-bearing hub has six axial reinforcing ribs, and the inner wall of the internal drive hub has four evenly distributed keyways.

[0061] Applicable scenarios: Suitable for heavy medical equipment weighing over 500kg and with high mobility (such as large G-arms equipped with multiple detection modules), and for complex environments requiring frequent transfer, such as emergency rooms and radiology departments.

[0062] Technical benefits: Welded fixing and anti-slip texture design enhance radial load-bearing capacity, adapting to heavy equipment; arc-shaped permanent magnets and extended soft magnetic pads enhance magnetic field focusing, increasing axial levitation force by about 15%, with starting thrust ≤18N, maintaining stability even under high-frequency movement; lightweight materials and snap-on end caps reduce overall weight, facilitating maintenance and adapting to the frequent operation needs in complex environments.

[0063] Specifically, the principle of this utility model is as follows:

[0064] From an overall structural perspective, the outer load-bearing hub is nested around the inner drive hub, forming a nested structure. This structure distributes the equipment's weight across the two hubs, achieving load distribution and improving the overall rigidity of the device, enabling it to stably support the weight of heavy medical equipment. A radial ceramic bearing is positioned between the outer load-bearing hub and the inner drive hub. It includes an inner ring, an outer ring, and rolling elements. The inner ring is fixedly connected to the outer wall of the inner drive hub, and the outer ring is fixedly connected to the inner wall of the outer load-bearing hub. When the equipment moves, the rolling elements roll between the inner and outer rings, converting traditional sliding friction into rolling friction. Utilizing the characteristic that the coefficient of rolling friction is much smaller than the coefficient of sliding friction, the frictional resistance between the inner and outer hubs is significantly reduced.

[0065] The axial magnetic levitation module is located at the end of the external load-bearing hub furthest from the radial ceramic bearing. Its core lies in the Halbach array layout of the permanent magnets. In the Halbach array, adjacent permanent magnets are arranged in a staggered 90° angle along their circumferential direction. The first permanent magnet is magnetized radially outwards, the next adjacent permanent magnet is magnetized circumferentially clockwise (or counterclockwise), the next next permanent magnet is magnetized radially inwards, and subsequent permanent magnets are magnetized circumferentially counterclockwise (or clockwise), forming a gradient distribution of magnetic field strength that increases unidirectionally in the radial direction and decreases on the other side. This layout significantly enhances the magnetic field strength on the side of the axial magnetic levitation module closer to the internal drive hub, thereby generating a stronger axial levitation force. Simultaneously, the soft magnetic pads placed between the permanent magnets are adapted to the shape of the permanent magnets' sides, effectively guiding the magnetic field direction, reducing magnetic leakage, further enhancing the focusing effect of the magnetic field, and improving the utilization rate of the axial levitation force.

[0066] When the equipment moves, the levitation force generated by the axial magnetic levitation module can dynamically counteract the lateral friction generated during the movement, working in conjunction with the rolling friction of the radial ceramic bearing to reduce the resistance to equipment movement from two directions. The end cap is located on the side of the axial magnetic levitation module furthest from the external load-bearing hub and is fixedly connected to the end of the external load-bearing hub. This serves two purposes: firstly, it provides a sealing protection for the axial magnetic levitation module, preventing impurities from entering and affecting the magnet's performance; secondly, it provides axial constraint to the module components, ensuring the stable operation of the magnetic levitation module.

[0067] The keyway on the inner wall of the internal drive hub matches the key structure on the drive shaft, enabling synchronous rotation of the internal drive hub and the drive shaft. This ensures that the power from the drive shaft is efficiently transmitted to the internal drive hub, driving the entire device to rotate and enabling equipment movement. The reinforcing ribs on the outer wall of the external load-bearing hub extend axially and are spaced out circumferentially. By increasing the structural strength of the hub, they reduce deformation under load, ensuring stable clearances between components and maintaining consistent low-friction characteristics.

Claims

1. A magnetic levitation low friction double sleeve hub device suitable for heavy medical equipment, characterized in that, The application relates to a wheel hub structure of a magnetic levitation wheel, which comprises an outer load-bearing hub, an inner driving hub, a radial ceramic bearing and an axial magnetic levitation module; the outer load-bearing hub is sleeved outside the inner driving hub, the radial ceramic bearing is arranged between the outer load-bearing hub and the inner driving hub, and the radial ceramic bearing is connected with the inner side wall of the outer load-bearing hub and the outer side wall of the inner driving hub respectively; the axial magnetic levitation module is arranged at one end of the outer load-bearing hub away from the radial ceramic bearing, and the axial magnetic levitation module is connected with the end of the outer load-bearing hub.

2. A magnetic levitation low friction double sheathed hub device suitable for use with heavy medical equipment according to claim 1, wherein, The axial magnetic levitation module comprises a plurality of permanent magnets which are arranged in a ring structure in a circumferential direction.

3. A magnetic levitation low friction double sheathed hub device suitable for use with heavy medical equipment according to claim 2, wherein, The permanent magnets adopt a Halbach array layout, and the magnetization directions of the permanent magnets are sequentially arranged at preset angles along the arrangement direction of the permanent magnets.

4. A magnetic levitation low friction double sheathed hub device suitable for use with heavy medical equipment according to claim 3, wherein, The radial ceramic bearing comprises an inner ring, an outer ring and rolling elements, the inner ring is fixedly connected with the outer side wall of the inner driving hub, the outer ring is fixedly connected with the inner side wall of the outer load-bearing hub, and the rolling elements are arranged between the inner ring and the outer ring.

5. A magnetic levitation low friction double sheathed hub device suitable for use with heavy medical equipment according to claim 4, wherein, The inner side wall of the outer load-bearing hub is provided with an annular protrusion, and the outer ring of the radial ceramic bearing is attached to the side surface of the annular protrusion.

6. A magnetic levitation low friction double sheathed hub device suitable for use with heavy medical equipment according to claim 5, wherein, The outer side wall of the inner driving hub is provided with an annular groove, and the inner ring of the radial ceramic bearing is embedded in the annular groove.

7. A magnetic levitation low friction double sheathed hub device suitable for use with heavy medical equipment according to claim 6, wherein, The shape of the soft magnetic gasket is matched with the side surface shape of the permanent magnet, one side of the soft magnetic gasket is attached to the side surface of one permanent magnet, and the other side of the soft magnetic gasket is attached to the side surface of the adjacent other permanent magnet.

8. A magnetic levitation low friction double sheathed hub device suitable for use with heavy medical equipment according to claim 7, wherein, The side of the axial magnetic levitation module away from the outer load-bearing hub is provided with an end cover, the end cover is fixedly connected with the end of the outer load-bearing hub, and the end cover covers the axial magnetic levitation module.

9. A magnetic levitation low friction double sheathed hub device suitable for use with heavy medical equipment according to claim 8, wherein, The outer side wall of the outer load-bearing hub is provided with a reinforcing rib extending in the axial direction, and a plurality of reinforcing ribs are arranged in the circumferential direction of the outer load-bearing hub.

10. A magnetic levitation low friction double sheathed hub device suitable for use with heavy medical equipment according to claim 9, wherein, The inner side wall of the inner driving hub is provided with a key groove extending in the axial direction, and a plurality of key grooves are arranged in the circumferential direction of the inner driving hub.

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