Magnetic attraction load-bearing bearing pulley and door and window

Abstract

According to the magnetic attraction load-bearing bearing pulley and the door and window, a first assembly and a second assembly are installed in a first annular installation groove of an outer ring of the pulley, and the first assembly and the second assembly are magnetically attracted, so that the interaction force of the inner ring and the outer ring of the bearing pulley is directly converted into the attraction force of two magnets; therefore, the overall bearing capacity of the pulley is obviously improved; moreover, due to the fact that attraction force exists between the two magnets, rolling and friction are not prone to being generated in the sliding process, noise is reduced, and when the bearing pulley moves to a rugged track, the attraction force serves as buffering force and plays a damping role.

Description

Technical Field

[0001] The invention relates to the technical field of doors and windows, and in particular to a magnetic load-bearing bearing pulley and a door and window. Background Art

[0002] In the hardware sliding door and window system, the bearing pulley plays a key role in bearing the load, and its smoothness is closely related to the force required when the door leaf is pushed and pulled. The performance of the hardware bearing pulley directly affects the convenience and comfort of users when operating doors and windows.

[0003] The bearings commonly used in the prior art are mostly roller bearings or needle bearings. However, when such bearings are pushed or pulled on the track on the door frame, the roller or needle bearing is in direct contact with the track, which is prone to vibration, resulting in an unstable pushing and pulling process. Such vibration will further cause noise problems, seriously affecting the user experience. In addition, long-term vibration may also cause track deformation, increased bearing wear and other problems, thereby shortening the service life of the door and window system. Summary of the invention

[0004] The purpose of the present invention is to provide a magnetic load-bearing bearing pulley and door and window, aiming to solve the problem that the existing bearings are prone to vibration during the pushing and pulling process, resulting in unstable pushing and pulling, and easily causing noise.

[0005] An embodiment of the present invention provides a magnetic load-bearing bearing pulley, comprising a pulley outer ring, a first component and a second component. The middle part of the pulley outer ring is hollowed out along the axial direction to form a first hollow area. The inner edge of the pulley outer ring is provided with a first annular mounting groove, and the first annular mounting groove is connected to the first hollow area. The first component and the second component are both embedded in the first annular mounting groove from the first hollow area and the second component is fixedly connected to the first annular mounting groove. The first component and the second component are magnetically attracted to each other, and the middle parts of the first component and the second component are both used for the rotating shaft to pass through.

[0006] Specifically, the first component and the second component are both annular magnets, the middle part of the second component is hollowed out along the axial direction to form a second hollow area, the first component is embedded in the second hollow area, the outer edge of the second component is embedded in the first annular mounting groove, and the middle part of the first component is provided with an axial hole for the rotating shaft to pass through.

[0007] Specifically, a second annular mounting groove is provided on the outer edge of the first component, and an inner edge of the second component is clamped in the second annular mounting groove.

[0008] Specifically, one of the first component and the second component is a permanent magnet, and the magnetic poles of the permanent magnet are distributed radially inside and outside or left and right.

[0009] Specifically, the second component is arranged on a side of the first component.

[0010] Specifically, two second components are provided, the two second components are arranged at an interval, and the first component is located between the two second components.

[0011] Specifically, when both of the two second components are permanent magnets, the adjacent sides of the two second components magnetically repel each other.

[0012] Specifically, both the first component and the second component are provided with an axis hole for the rotating shaft to pass through.

[0013] Specifically, one of the first component and the second component is a magnetic conductor, and the other is a permanent magnet; or both the first component and the second component are permanent magnets.

[0014] An embodiment of the present invention further provides a door and window, comprising a track and a magnetic load-bearing bearing pulley slidably arranged on the track.

[0015] An embodiment of the present invention provides a magnetic load-bearing bearing pulley and door and window. The bearing pulley is achieved by installing a first component and a second component in a first annular mounting groove of an outer ring of the pulley, and the first component and the second component are magnetically attracted to each other, so that the interaction force between the inner ring and the outer ring of the bearing pulley is directly converted into the attraction force of the two magnets, thereby significantly improving the overall load-bearing capacity of the pulley; moreover, due to the attraction between the two magnets, rolling and friction are not easily generated during the sliding process, thereby reducing the generation of noise, and when the bearing pulley moves to an uneven track, the attraction acts as a buffer force to achieve a shock-absorbing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0017] Figure 1 An exploded schematic diagram of a magnetic load-bearing bearing pulley provided in the first embodiment of the present invention;

[0018] Figure 2 A cross-sectional schematic diagram of a magnetic load-bearing bearing pulley provided in the first embodiment of the present invention;

[0019] Figure 3 The magnetic pole distribution diagram of the permanent magnet in the first embodiment of the present invention;

[0020] Figure 4A schematic diagram of a magnetic load-bearing bearing pulley installed on a track provided in the first embodiment of the present invention;

[0021] Figure 5 An exploded schematic diagram of a magnetic load-bearing bearing pulley provided in accordance with the second embodiment of the present invention;

[0022] Figure 6 A cross-sectional schematic diagram of a magnetic load-bearing bearing pulley provided in a second embodiment of the present invention;

[0023] Figure 7 is a magnetic pole distribution diagram of a permanent magnet in a second embodiment of the present invention;

[0024] Figure 8 A schematic diagram of a magnetic load-bearing bearing pulley installed on a track provided in a second embodiment of the present invention;

[0025] Fig. 9 An exploded schematic diagram of a magnetic load-bearing bearing pulley provided in the third embodiment of the present invention;

[0026] Fig.10 A cross-sectional schematic diagram of a magnetic load-bearing bearing pulley provided in a third embodiment of the present invention;

[0027] Fig.11 is a magnetic pole distribution diagram of a permanent magnet in a third embodiment of the present invention;

[0028] Fig.12 This is a schematic diagram of a magnetic load-bearing bearing pulley installed on a track provided in the third embodiment of the present invention.

[0029] Description of the symbols in the figure:

[0030] 1. outer ring of pulley; 11. first hollow area; 12. first annular mounting groove;

[0031] 2. first component; 21. first axial hole; 22. second annular mounting groove;

[0032] 3. Second component; 31. Second hollow area; 32. Second axial hole;

[0033] 4. Rotation axis;

[0034] 5. Track. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0037] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0038] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0039] See also Figure 1-2 as well as Figure 4 An embodiment of the present invention provides a magnetic load-bearing bearing pulley, including a pulley outer ring 1, a first component 2 and a second component 3. The middle part of the pulley outer ring 1 is hollowed out along the axial direction to form a first hollow area 11. The inner edge of the pulley outer ring 1 is provided with a first annular mounting groove 12, and the first annular mounting groove 12 is connected to the first hollow area 11. The first component 2 and the second component 3 are both embedded in the first annular mounting groove 12 from the first hollow area 11 and the second component 2 is fixedly connected to the first annular mounting groove 12. The first component 2 and the second component 3 are magnetically attracted to each other, and the middle parts of the first component 2 and the second component 3 are used for the rotating shaft 4 to pass through.

[0040] In this embodiment, the pulley outer ring 1 is made of high-strength, wear-resistant metal materials, such as aluminum alloy or stainless steel. Through precision machining technology, the middle part of the pulley outer ring 1 is hollowed out along the axial direction to form a first hollow area 11, which provides space for the subsequent installation of two magnets. On the inner edge of the pulley outer ring 1, a first annular mounting groove 12 is also opened by machining to ensure that the first annular mounting groove 12 is connected to the first hollow area 11, and then the first component 2 and the second component 3 are embedded into the first annular mounting groove 12 from the first hollow area 11, wherein the second component 3 is fixedly connected to the first annular mounting groove 12, so that the pulley outer ring 1 and the second component 3 are fixed as a whole, and the first component 2 is adsorbed by the second component 3 in the middle of the axis of the first hollow area 11. During the installation process, ensure that the positions of the first component 2 and the second component 3 in the first annular mounting groove 12 are aligned, and the magnetically attracted surfaces of the two magnets are opposite. The rotating shaft 4 is usually made of high-strength alloy steel, and its strength and toughness are improved through heat treatment. The rotating shaft 4 is passed through the shaft holes reserved in the middle of the first component 2 and the second component 3 , so as to realize the installation of the rotating shaft 4 .

[0041] In this embodiment, the first component 2 and the second component 3 are installed in the outer ring 1 of the pulley, and the first component 2 and the second component 3 are magnetically attracted to each other, so that the interaction force between the inner ring and the outer ring of the bearing pulley is directly converted into the attraction force of the two magnets, thereby significantly improving the overall load-bearing capacity of the pulley. Moreover, since there is an attraction force between the two magnets, but this attraction force is not fixed during the sliding process, that is, the inner ring and the outer ring of the bearing pulley are not rigidly connected like conventional ball bearings. When the bearing pulley moves to an uneven track, the attraction force acts as a buffer force to reduce shock; and the attraction force of the two magnets can balance the components of the inner ring of the bearing in the outer ring 1 of the pulley, so that there is no rolling and friction between the inner ring and the outer ring of the bearing like conventional ball bearings, and the bearing pulley is smoother during the sliding process.

[0042] In specific implementation, the bearing pulley is usually installed on doors and windows or other equipment that needs to be opened by sliding. In order to reduce the noise generated during the sliding process, a low-noise material (such as engineering plastic or rubber) can be used as a liner on the outer edge of the pulley outer ring 1 to reduce the direct contact between the outer edge of the pulley outer ring 1 and the installed equipment. For example, adding a layer of nylon or polytetrafluoroethylene (PTFE) coating on the outer side of the pulley outer ring 1 can reduce friction and noise.

[0043] Specifically, the first component 2 and the second component 3 are both annular magnets. The middle part of the second component 3 is hollowed out along the axial direction to form a second hollow area 31. The first component 2 is embedded in the second hollow area 31. The outer edge of the second component 3 is embedded in the first annular mounting groove 12. The middle part of the first component 2 is provided with an axial hole for the rotating shaft 4 to pass through.

[0044] In this embodiment, the first component 2 and the second component 3 are both configured in a ring shape (refer to Figure 1 , Figure 5 and Fig. 9 ), this shape is conducive to generating a uniform magnetic field in the circumferential direction, ensuring that the entire bearing pulley is relatively balanced in all directions during rotation. In addition, the second component 3 is provided with a second hollow area 31, the first component 2 is embedded in the second hollow area 31, and then the outer edge of the second component 3 is embedded in the first annular mounting groove 12, and the entire bearing pulley forms a nested structure. This design makes the connection between the two magnets and the pulley outer ring 1 tight and the structure compact. An axial hole (for ease of explanation, the axial hole is named the first axial hole 21) is provided in the middle of the first component 2 for the rotation shaft 4 to pass through, ensuring that the relative position of the rotation shaft 4 and the first component 2 is fixed, providing stable support for the rotation of the bearing pulley.

[0045] When the rotating shaft 4 passes through the first shaft hole 21 of the first component 2 and is installed on the corresponding equipment, the first component 2 and the second component 3 will generate a magnetic force of attraction due to magnetic attraction. This magnetic force keeps the inner ring (composed of the first component, the rotating shaft, etc.) balanced in the pulley outer ring 1. When an external force acts to rotate the pulley, due to the attraction between the magnets and this stable nested structure, the inner ring and outer ring of the bearing pulley can rotate relatively smoothly, realizing the normal operation of the pulley.

[0046] In a specific implementation, the annular area of ​​the second component 3 can be set to be larger than the annular area of ​​the first component 2, so that the entire first component 2 is embedded in the second hollow area 31 (refer to Figure 6 ), so that the connection between the two magnets is tighter. In other embodiments, the annular area of ​​the second component 3 can also be set to be smaller than the annular area of ​​the first component 2. In this case, the first component 2 is not completely embedded in the second hollow area 31 (refer to Figure 2 ), specifically, a second annular mounting groove 22 is provided on the outer edge of the first component 2, and an inner edge of the second component 3 is clamped in the second annular mounting groove 22, that is, an area of ​​the first component 2 corresponding to the second annular mounting groove 22 is embedded in the second hollow area 31, so that the inner edge of the second component 3 is clamped in the second annular mounting groove 22.

[0047] Specifically, Figure 3 and Figure 7 As shown, one of the first component 2 and the second component 3 is a permanent magnet, and the magnetic poles of the permanent magnet are distributed radially inside and outside or left and right.

[0048] In this embodiment, when one of the first component 2 and the second component 3 is a permanent magnet and its magnetic poles are radially distributed inward and outward, a radial magnetic field from the inner side to the outer side of the permanent magnet will be formed in the pulley. Figure 3 (a) and Figure 7 In (a)), the inner side of the second component 3 is the N pole and the outer side is the S pole (or vice versa), and the first component 2 attracted thereto will be subjected to the magnetic force in the radial direction. This radially distributed magnetic force makes the interaction between the two magnets more direct, and can provide a stable suction force in the radial direction during the rotation of the pulley, which helps to maintain the relative position relationship between the first component 2 and the second component 3, thereby ensuring the stable operation between the inner ring and the outer ring of the bearing pulley.

[0049] If the permanent magnet poles are distributed along the left and right sides, the second component 3 is also a permanent magnet and the poles are distributed along the left and right sides (see Figure 3 (b) and Figure 7 In (b)), assuming that the left side is the N pole and the right side is the S pole (or vice versa), a magnetic field will be formed in the left and right directions. In this case, the direction of the magnetic force between the first component 2 and the second component 3 changes and is no longer a simple radial direction. When the pulley is running, the magnetic force distributed on the left and right will produce a lateral force on the magnet assembly, which will affect the overall force balance of the pulley. In other implementation scenarios, the pulley with magnetic poles distributed on the left and right can offset the lateral force caused by the inclination of the track through magnetic force, prevent the pulley from being displaced due to the lateral force, ensure the smooth sliding of the pulley, and greatly improve the stability of the pulley in the horizontal direction.

[0050] Specifically, Fig.10 As shown, the second component 3 is arranged on the side of the first component 2 .

[0051] In this embodiment, when the bearing pulley is subjected to lateral force, the second component 3 is preferably arranged on the side of the first component 2. For example, when the bearing pulley is installed on an inclined track for operation, or when the equipment is subjected to lateral impact force during operation, the lateral magnetic force generated by the two magnets can directly counteract these external forces due to the mutual attraction of the two magnets at the sides. Compared with the nested layout of the two magnets in the aforementioned embodiment, this structure can more effectively prevent the two magnets from being displaced due to lateral force, ensuring that the bearing pulley can still operate stably under complex working conditions.

[0052] Specifically, two second components 3 are provided, the two second components 3 are arranged at an interval, and the first component 2 is located between the two second components 3 .

[0053] In the above-mentioned embodiment, the second component 3 is mainly arranged on one side of the first component 2 (refer to Fig.10In (a)), in this embodiment, the second component 3 can be arranged on both sides of the first component 2 (refer to Fig.10 (b)) in the figure makes the first component 2 receive relatively balanced magnetic pull from both sides in the pulley outer ring 1, forming a force state similar to "symmetrical clamping". This force state can have a stabilizing effect on the first component 2 in multiple directions. The setting of the two second components 3 helps to build a more balanced overall magnetic field. During the rotation of the bearing pulley, the uniform and balanced magnetic field can make the interaction force between the first component 2 and the second component 3 more stable, avoiding local wear or uneven force caused by uneven magnetic force.

[0054] Specifically, Fig.11 As shown, when both second components 3 are permanent magnets, the adjacent sides of the two second components 3 magnetically repel each other.

[0055] In this embodiment, the two second components 3 are magnetically attracted to the first component 2, so the magnetic poles of the two second components 3 on the side close to each other are set to be the same, that is, N or S (refer to Fig.11 ), so that the first component 2 is subjected to the same attraction on both sides and is adsorbed in a balanced manner in the middle of the axis of the first hollow area 11. When the pulley is subjected to external lateral force or interference force in other directions, the repulsive force between the two second components 3 and the suction force between the two second components 3 and the first component 2 work together to form a dynamic balance mechanism. For example, for a bearing pulley running on an inclined track, the lateral force will break the original balance between the magnets. At this time, the suction force between the second component 3 close to the direction of the lateral force and the first component 2 will increase, and the suction force on the other side will decrease, and the repulsive force between the two second components 3 will also be adjusted accordingly, so that the first component 2 can automatically adjust its position and maintain a relatively stable state, thereby continuing to ensure the normal operation of the pulley.

[0056] Specifically, Fig. 9 As shown, both the first component 2 and the second component 3 are provided with shaft holes for the rotating shaft 4 to pass through.

[0057] In the aforementioned embodiment, since the first component 2 is nested and connected to the second component 3, the first component 2 only needs to be provided with an axial hole so that the rotating shaft 4 can pass through the two magnets. In this embodiment, the second component 3 is arranged on the side of the first component 2 (arranged on the same side, or respectively on both sides). In order to allow the rotating shaft 4 to pass through the two magnets, both the first component 2 and the second component 3 need to be provided with axial holes. For ease of explanation, the axial hole of the first component 2 is named as the first axial hole 21, and the axial hole of the second component 3 is named as the second axial hole 32, wherein the size of the second axial hole 32 can be set to be the same as the size of the first axial hole 21, and the sizes of the two axial holes are larger than the axial diameter of the rotating shaft 4, or the size of the second axial hole 32 can be set to be larger than the size of the first axial hole 21. At this time, the size of the first axial hole 21 is larger than the axial diameter of the rotating shaft 4, so that the rotating shaft 4 can pass through the second axial hole 32 and the first axial hole 21 at the same time.

[0058] Specifically, one of the first component 2 and the second component 3 is a conductive magnet, and the other is a permanent magnet; or both the first component 2 and the second component 3 are permanent magnets.

[0059] In this embodiment, the magnetic conductor is a material that can guide and enhance the magnetic field. It does not have the ability to spontaneously generate a magnetic field. However, when it is in an external magnetic field, the atomic magnetic moments inside the magnetic conductor tend to be arranged in a consistent manner under the action of the external magnetic field, so that it exhibits magnetism and can significantly enhance the surrounding magnetic field strength. Common magnetic conductor materials include iron, cobalt, nickel and their alloys. Permanent magnet refers to a material that can maintain magnetism for a long time after being magnetized. It has a unique crystal structure and internal atomic arrangement, so that the atomic magnetic moment can spontaneously maintain a consistent direction, thereby generating a stable magnetic field. Permanent magnets can maintain their own magnetism without the continuous action of an external magnetic field. Common permanent magnet materials include neodymium iron boron, ferrite, aluminum nickel cobalt, etc. In order to optimize the magnetic field distribution between the two magnets: one of the two magnets is a permanent magnet and the other is a magnetic conductor, that is, when the first component 2 is a magnetic conductor, the second component 3 is a permanent magnet, or the first component 2 is a permanent magnet and the second component 3 is a magnetic conductor, and the permanent magnet can generate a stable original magnetic field. The magnetic conductor can guide and concentrate the magnetic field generated by the permanent magnet. This setting helps to focus the magnetic field more accurately in the required area. The first component 2 and the second component 3 can also be set as permanent magnets. The two permanent magnets can build a stable magnetic circuit, guide the direction of the magnetic lines of force, and concentrate the magnetic lines of force in a specific area.

[0060] In specific implementation, in order to enhance the magnetism of the two magnets, the magnetizer can be made of a magnetizer material with high magnetic permeability, such as Permalloy (iron-nickel alloy). Using such a high magnetic permeability material as a magnetizer can more efficiently guide the magnetic lines of force generated by the permanent magnet, allowing more magnetic lines of force to pass through the magnetizer, thereby significantly enhancing the magnetism between the magnetizer and the permanent magnet. The permanent magnet can also be made of a high-performance permanent magnet material, such as neodymium iron boron. The use of neodymium iron boron permanent magnets can generate a stronger original magnetic field, thereby increasing the magnetism between the magnetizer and the permanent magnet.

[0061] The magnetizer and the permanent magnet can also be designed into a tooth-like structure, and the two mesh with each other, which can significantly increase the contact area, promote the conduction of magnetic lines of force, and enhance the magnetism between the two. In addition, an additional external magnetic field can be applied around the magnetizer and the permanent magnet, and the direction of the magnetic field is consistent with the direction of the magnetic field of the permanent magnet. According to the principle of magnetic field superposition, after the external magnetic field is superimposed with the magnetic field of the permanent magnet, the total magnetic field strength is increased, thereby enhancing the magnetism between the magnetizer and the permanent magnet. If it is necessary to enhance the efficiency of the magnetic circuit, a magnetic conductive material (such as silicon steel) can be used in the pulley outer ring 1 to optimize the distribution of magnetic lines of force, reduce magnetic leakage, and improve the magnetic attraction effect of the two magnets.

[0062] like Figure 4 , Figure 8 as well as Fig.12 As shown, an embodiment of the present invention further provides a door and window, comprising a track 5 and a magnetic load-bearing bearing pulley slidably arranged on the track 5 .

[0063] In this embodiment, a groove is provided on the outer edge of the pulley outer ring 1, and a protrusion structure is provided on the track 5. The groove of the pulley outer ring 1 is installed on the track 5 corresponding to the protrusion structure, and can slide along the track 5, thereby realizing the sliding connection between the magnetic load-bearing bearing pulley and the track 5. The rotating shaft 4 passes through the first hollow area 11 and the first shaft hole 21 (the second shaft hole 32). At this time, the load-bearing force F acts on the rotating shaft 4, and the rotating shaft 4 is fixed as a whole with the first component 2. The entire bearing pulley is always supported by the track 5 and can roll on the track 5. Therefore, the load-bearing force F is converted into a magnetic attraction force acting between the first component 2 and the second component 3. This setting can effectively reduce the bumps and vibration noise of the load-bearing force F caused by the unevenness of the load-bearing track, and can effectively reduce the direct vibration caused by rolling compared to the bearing with rollers.

[0064] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A magnetic load-bearing bearing pulley, characterized in that: It includes a pulley outer ring, a first component and a second component. The middle part of the pulley outer ring is hollowed out along the axial direction to form a first hollow area. The inner edge of the pulley outer ring is provided with a first annular mounting groove, and the first annular mounting groove is connected to the first hollow area. The first component and the second component are both embedded in the first annular mounting groove from the first hollow area and the second component is fixedly connected to the first annular mounting groove. The first component and the second component are magnetically attracted to each other, and the middle parts of the first component and the second component are used for the rotating shaft to pass through.

2. The magnetic load-bearing bearing pulley according to claim 1, characterized in that: The first component and the second component are both annular magnets. The middle part of the second component is hollowed out along the axial direction to form a second hollow area. The first component is embedded in the second hollow area. The outer edge of the second component is embedded in the first annular mounting groove. The middle part of the first component is provided with an axial hole for the rotating shaft to pass through.

3. The magnetic load-bearing bearing pulley according to claim 2, characterized in that: The outer edge of the first component is provided with a second annular mounting groove, and the inner edge of the second component is clamped in the second annular mounting groove.

4. The magnetic load-bearing bearing pulley according to claim 2, characterized in that: One of the first component and the second component is a permanent magnet, and the magnetic poles of the permanent magnet are distributed radially inside and outside or left and right.

5. The magnetic load-bearing bearing pulley according to claim 1, characterized in that: The second component is arranged on the side of the first component.

6. The magnetic load-bearing bearing pulley according to claim 5, characterized in that: There are two second components, the two second components are arranged at an interval, and the first component is located between the two second components.

7. The magnetic load-bearing bearing pulley according to claim 6, characterized in that: When both of the two second components are permanent magnets, the adjacent sides of the two second components repel each other magnetically.

8. The magnetic load-bearing bearing pulley according to any one of claims 5 to 7, characterized in that: The first component and the second component are both provided with shaft holes for the rotating shaft to pass through.

9. The magnetic load-bearing bearing pulley according to claim 1, characterized in that: One of the first component and the second component is a magnetic conductor, and the other is a permanent magnet; or both the first component and the second component are permanent magnets.

10. A door and window, characterized in that: It comprises a track and a magnetic load-bearing bearing pulley slidably arranged on the track.

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