Magnetic adsorption wheel assembly and assembling and disassembling method

Abstract

The application discloses a magnetic adsorption wheel assembly and an assembling and disassembling method. The magnetic adsorption wheel assembly comprises a support frame, a rotating shaft rotatably arranged on the support frame and a magnetic adsorption wheel module synchronously rotating with the rotating shaft. The magnetic adsorption wheel module comprises an annular positioning structure arranged on the rotating shaft, a permanent magnet annularly arranged on the outer circumferential part of the annular positioning structure and two magnetic conductive wheels. The two magnetic conductive wheels are located at opposite ends of the permanent magnet and are fixed with the annular positioning structure. The support frame is provided with a magnetic adsorption force adjusting device. The magnetic adsorption force adjusting device comprises a mounting frame arranged on one side of the support frame, a magnetic short circuit block located on the side of the mounting frame facing the magnetic conductive wheel and an adjusting structure arranged on the mounting frame and used for driving the magnetic short circuit block to move towards or away from the direction of the magnetic conductive wheel. The assembling and disassembling method comprises a magnetic adsorption wheel module assembling step. The application is convenient to separate from the working surface, simple in structure, convenient to operate and can be simply, quickly and non-damaged assembled by means of a locking screw.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of magnetic adsorption wall climbing, and particularly relates to a magnetic adsorption wheel assembly and an assembling and disassembling method. BACKGROUND

[0002] The magnetic adsorption wall climbing robot is a robot for working on a magnetically conductive wall surface, and relies on magnetic force to be adsorbed on the magnetically conductive wall surface and to move on the wall surface to achieve the working requirements. Among them, the adsorption is one of the key technologies of the robot. The commonly used adsorption device on the magnetic adsorption wall climbing robot at present is a magnetic adsorption wheel. Although the magnetic adsorption wheel has a simple structure, the following problems mainly exist: 1) In order to ensure the stability and reliability of the adsorption, the adsorption force N of the magnetic adsorption wheel is generally large, and at the same time, the difficulty of taking down (separating) the magnetic adsorption wheel from the adsorbed wall surface is increased. Generally, the magnetic adsorption wheel is forcibly separated from the adsorbed wall surface by means of strong force or the magnetic adsorption force is offset by using a reverse magnetic field. Both methods have the problems of complex structure and cumbersome operation. 2) Because the working surface is usually made of steel, the magnetic adsorption wheel and the adsorbed wall surface can only form point and line contact, and the friction coefficient between the steels is very small (0.15, which may be reduced to 0.05 or less when encountering water or oil). Therefore, the phenomenon of slipping easily occurs. At present, the phenomenon is mainly overcome by knurling on the outside of the magnetic adsorption wheel to increase the friction or by gluing on the outside of the magnetic adsorption wheel. However, the effect of knurling on the steel contact surface to prevent slipping is poor. The thickness of the glue is not easy to control. If the glue is too thick, the magnetic adsorption force will be affected. If the glue is too thin, the anti-skid effect is poor and the glue is easy to relax and fall off. 3) The magnetic adsorption wheel has strong magnetism. When it is used for welding and cleaning robots, the magnetic adsorption wheel inevitably adsorbs welding slag, iron filings, rust and other sundries. These sundries wrapped on the magnetic adsorption wheel will destroy the adsorption stability, and even change the outer diameter of the magnetic adsorption wheel and destroy the precision of the motion control. 3) The strong magnetic adsorption force of the magnetic adsorption wheel is very large. During assembly, an additional clamping jig is usually needed to operate. During assembly, the magnetic adsorption wheel is easy to be clamped and the permanent magnet (brittle material) is easy to be broken. The assembly process is relatively complex, and after assembly, it is not easy to disassemble, which is not convenient for the replacement and maintenance of the permanent magnet in the later period, and the maintenance cost is high. SUMMARY

[0003] In order to overcome at least one of the deficiencies in the prior art described above, the present application provides a magnetic adsorption wheel assembly, the magnetic adsorption force of which is adjustable, the magnetic adsorption wheel assembly is easy to separate from the working surface, and the magnetic adsorption wheel assembly has a simple structure and is easy to operate.

[0004] As the same technical concept, the present application further provides an assembling and disassembling method of the magnetic adsorption wheel assembly, the assembling and disassembling method is simple and portable, and has a high safety factor.

[0005] To solve the problems in the prior art, the embodiment of the present application provides a magnetic adsorption wheel assembly, which comprises a support frame, a rotating shaft rotatably arranged on the support frame, and a magnetic adsorption wheel module synchronously rotating with the rotating shaft; characterized in that the magnetic adsorption wheel module comprises an annular positioning structure arranged on the rotating shaft, a permanent magnet annularly arranged on the outer circumferential part of the annular positioning structure, and two magnetic guide wheels, the two magnetic guide wheels being located at opposite ends of the permanent magnet and fixedly connected with the annular positioning structure.

[0006] The support frame is provided with a magnetic adsorption force adjusting device for adjusting the magnetic adsorption force between the magnetic guide wheels and the working surface; the magnetic adsorption force adjusting device comprises a mounting frame arranged on one side of the support frame, a magnetic short-circuit block located on the side of the mounting frame facing the magnetic guide wheels, and an adjusting structure arranged on the mounting frame for driving the magnetic short-circuit block to move towards or away from the magnetic guide wheels.

[0007] Further, the adjusting structure comprises at least two adjusting screws arranged at intervals on the mounting frame, one end of the adjusting screw being threadedly connected with the magnetic short-circuit block; the magnetic short-circuit block is provided with an inner concave arc surface for abutting against the outer circumferential wall of the magnetic guide wheel and a clearance corresponding to the permanent magnet.

[0008] Further, the radial dimension of the magnetic guide wheel is 1-15 mm larger than the radial dimension of the permanent magnet.

[0009] The outer circumferential part of the permanent magnet is annularly provided with a flexible sleeve for increasing the frictional force with the working surface, the radial dimension of the flexible sleeve being 0.1-3 mm larger than the radial dimension of the magnetic guide wheel.

[0010] Further, the support frame is provided with an adsorption wheel cleaning device, the adsorption wheel cleaning device being used for peeling off sundries adsorbed on the outer circumferential part of the magnetic guide wheel and adsorbing and recycling the peeled sundries when the magnetic guide wheel rotates.

[0011] Further, the adsorption wheel cleaning device comprises a scraper and a magnetic adsorption piece, the scraper comprising a fixed segment and an inclined segment connected with each other, the fixed segment being mounted on the support frame, and the magnetic adsorption piece being mounted on the fixed segment; the inclined segment is provided with a notch part corresponding to the permanent magnet and a scraper blade abutting against the outer circumferential part of the magnetic guide wheel, and the inclined direction of the inclined segment and the tangent direction of the abutting part of the magnetic guide wheel form a set angle.

[0012] Further, an annular limiting portion for axially limiting the permanent magnet is arranged on the annular positioning structure, and an avoiding slot is arranged on the magnetic wheel adjacent to the annular limiting portion; a plurality of circumferentially spaced mounting through holes and a plurality of axially penetrating and circumferentially spaced tightening screw holes are arranged on each of the magnetic wheels; the tightening screw holes correspond to the end faces of the annular positioning structure; a plurality of threaded mounting holes are arranged on both ends of the annular positioning structure; the threaded mounting holes on both sides correspond to the mounting through holes on the two magnetic wheels respectively.

[0013] The application also provides an assembling and disassembling method of the magnetic adsorption wheel assembly for assembling or disassembling the magnetic adsorption wheel assembly; the magnetic wheel with the avoiding slot in the same magnetic adsorption wheel module is a first magnetic wheel, and the other magnetic wheel is a second magnetic wheel; the assembling and disassembling method comprises a magnetic adsorption wheel module assembling step.

[0014] The magnetic adsorption wheel module assembling step comprises:

[0015] S1, mounting the permanent magnet on the annular positioning structure, and abutting one end face of the permanent magnet against the annular limiting portion;

[0016] S2, screwing a tightening screw into the tightening screw hole of the first magnetic wheel, and making the end of the tightening screw protrude from one side of the first magnetic wheel toward the permanent magnet by a certain length A;

[0017] S3, abutting the end of the protruding end of the tightening screw against one end face of the annular positioning structure, then screwing the tightening screw, moving the first magnetic wheel toward the permanent magnet and finally adsorbing the permanent magnet, and removing the tightening screw; connecting the first threaded connecting piece through the mounting through hole of the first magnetic wheel with the corresponding threaded mounting hole on the annular positioning structure;

[0018] S4, screwing a tightening screw into the tightening screw hole of the second magnetic wheel, and making the end of the tightening screw protrude from one side of the second magnetic wheel toward the permanent magnet by a certain length A;

[0019] S5, abutting the end of the protruding end of the tightening screw against the other end face of the annular positioning structure, then screwing the tightening screw, moving the second magnetic wheel toward the permanent magnet and finally adsorbing the permanent magnet, and removing the tightening screw; connecting the second threaded connecting piece through the mounting through hole of the second magnetic wheel with the corresponding threaded mounting hole on the annular positioning structure.

[0020] Further, the annular positioning structure and the rotary shaft are an integral molding structure;

[0021] The first magnetic wheel sleeve needs to be first arranged on the rotating shaft before step S3 after step S2;

[0022] The second magnetic wheel sleeve needs to be first arranged on the rotating shaft before step S5 after step S4.

[0023] Further, the annular positioning structure is connected with the rotating shaft through a key; the annular positioning structure comprises a sleeve and an annular positioning body arranged on the sleeve; the annular limiting part is arranged on the outer circumferential part of one end of the annular positioning body; and the threaded mounting hole is arranged on the annular positioning body;

[0024] The first magnetic wheel sleeve needs to be first arranged on the sleeve before step S3 after step S2.

[0025] The second magnetic wheel sleeve needs to be first arranged on the sleeve before step S5 after step S4.

[0026] Further, the assembly and disassembly method further comprises a magnetic adsorption wheel module disassembly step, and the magnetic adsorption wheel module disassembly step comprises:

[0027] S6, the first threaded connecting piece on the first magnetic wheel and the annular positioning structure, the second threaded connecting piece on the second magnetic wheel and the annular positioning structure are removed;

[0028] S7, the second magnetic wheel is disassembled from the annular positioning structure by means of the set screw;

[0029] S8, the first magnetic wheel is disassembled from the annular positioning structure by means of the set screw;

[0030] S9, the permanent magnet is removed from the annular positioning structure.

[0031] Due to the adoption of the above technical scheme, the following beneficial effects are achieved:

[0032] The magnetic adsorption wheel assembly in the application comprises a support frame, a rotating shaft rotatingly installed on the support frame, and a magnetic adsorption wheel module rotating synchronously with the rotating shaft; the magnetic adsorption wheel module comprises an annular positioning structure arranged on the rotating shaft, a permanent magnet arranged on the outer circumferential part of the annular positioning structure, and two magnetic wheels, the two magnetic wheels are located at opposite ends of the permanent magnet and are fixedly connected with the annular positioning structure; the support frame is provided with a magnetic adsorption force adjusting device for adjusting the magnetic adsorption force between the magnetic wheels and the working surface; the magnetic adsorption force adjusting device comprises a mounting frame arranged on one side of the support frame, a magnetic short-circuit block located on the side of the mounting frame facing the magnetic wheels, and an adjusting structure arranged on the mounting frame for driving the magnetic short-circuit block to move towards or away from the direction of the magnetic wheels.

[0033] When the magnetic adsorption wheel assembly needs to be firmly adsorbed on the working surface, the magnetic short circuit block is moved away from the magnetic conducting wheel by means of the adjusting structure, at this time, the magnetic conducting wheel and the working surface form the only magnetic circuit of the permanent magnet from N pole to S pole, and the magnetic adsorption force between the magnetic conducting wheel and the working surface is the largest. When the magnetic adsorption force needs to be reduced, the magnetic short circuit block is gradually moved close to the outer peripheral part of the magnetic conducting wheel until it is in contact by means of the adjusting structure, the magnetic short circuit block establishes another parallel magnetic circuit between the magnetic conducting wheels, which weakens the magnetic field density between the magnetic conducting wheel and the working surface, and the magnetic adsorption force is reduced, at this time, the magnetic adsorption wheel assembly is easy to separate from the working surface. In short, the present application uses the "magnetic resistance minimum theory" of the magnetic field, and adjusts the size of the magnetic adsorption force by increasing the parallel magnetic circuit, so that the magnetic adsorption wheel assembly is firmly adsorbed on the working surface or easily separated from the working surface.

[0034] In addition, the assembling and disassembling method of the magnetic adsorption wheel assembly in the present application can simply, quickly and non-damagingly assemble the magnetic adsorption wheel module therein by means of the set screw and the threaded connecting piece. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0036] Figure 1 is a structural schematic view of the first embodiment of the magnetic adsorption wheel assembly of the present application;

[0037] Figure 2 is a sectional view of Figure 1

[0038] Figure 3 is a structural schematic view of another state of Figure 1

[0039] Figure 4 is a partial sectional view of the second embodiment of the magnetic adsorption wheel assembly of the present application;

[0040] Figure 5 is a structural schematic view of the second annular positioning structure in Figure 4

[0041] Figure 6 is a flow chart of the assembling and disassembling method of the magnetic adsorption wheel assembly;

[0042] ​​​In the figure: 1-support frame, 11-rotary bearing, 12-bearing cover, 2-rotary shaft, 3-magnetic adsorption wheel module, 31-first annular positioning structure, 32-permanent magnet, 33-first magnetic guide wheel, 331-first tight screw hole, 34-second magnetic guide wheel, 341-second tight screw hole, 35-flexible sleeve, 36-first threaded connecting piece, 37-second threaded connecting piece, 38-second annular positioning structure, 381-shaft sleeve, 382-annular positioning body, 39-annular limiting part, 4-magnetic adsorption force adjusting device, 41-mounting frame, 42-magnetic short-circuit block, 421-internal concave circular arc surface, 422-avoidance opening, 43-adjusting screw, 5-adsorption wheel cleaning device, 51-scraping knife, 52-magnetic adsorption piece, 6-flat key, 7-working surface. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0044] It should be noted that if the present application examples involve directional indications, the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0045] In addition, if the present application examples involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0046] By Figures 1 to 3As shown in the drawings, the base embodiment of the main concept of the present application discloses a magnetic adsorption wheel assembly, which comprises a support frame 1, a rotating shaft 2 rotatably installed on the support frame 1, and a magnetic adsorption wheel module 3 synchronously rotating with the rotating shaft 2; the magnetic adsorption wheel module 3 comprises an annular positioning structure arranged on the rotating shaft 2, a permanent magnet 32 annularly arranged on the outer circumferential portion of the annular positioning structure, and two magnetic conductive wheels (a first magnetic conductive wheel 33 and a second magnetic conductive wheel 34); the two magnetic conductive wheels are located at opposite ends of the permanent magnet 32 and are fixedly connected with the annular positioning structure; the support frame 1 is provided with a magnetic adsorption force adjusting device 4 for adjusting the magnetic adsorption force between the magnetic conductive wheels and a working surface 7; the magnetic adsorption force adjusting device 4 comprises a mounting bracket 41 arranged on one side of the support frame 1, a magnetic short-circuit block 42 located on the side of the mounting bracket 41 facing the magnetic conductive wheels, and an adjusting structure arranged on the mounting bracket 41 for driving the magnetic short-circuit block 42 to move towards or away from the direction of the magnetic conductive wheels.

[0047] When it is needed to firmly adsorb the magnetic adsorption wheel assembly on the working surface 7, the magnetic short-circuit block 42 is moved away from the magnetic conductive wheels by means of the adjusting structure, and the magnetic conductive wheels and the working surface 7 form the only magnetic circuit of the permanent magnet 32 from the N pole to the S pole, at this time, the magnetic adsorption force between the magnetic conductive wheels and the working surface 7 is the largest. When it is needed to reduce the magnetic adsorption force, the magnetic short-circuit block 42 is gradually moved close to the magnetic conductive wheels until it is in contact with the outer circumferential portion by means of the adjusting structure, another parallel magnetic circuit is established between the magnetic short-circuit block 42 and the magnetic conductive wheels, which weakens the magnetic field density between the magnetic conductive wheels and the working surface 7, resulting in the reduction of the magnetic adsorption force, and the magnetic adsorption wheel assembly can be easily separated from the working surface 7.

[0048] In some embodiments, the support frame 1 can be selected as a U-shaped frame, an L-shaped frame, a T-shaped frame, etc. according to the needs, and the support frame 1 can also be designed as a split structure for the convenience of installation of the rotating shaft 2. The top of the support frame 1 is provided with mounting holes for installation on the wall-climbing robot, and the side is provided with mounting holes for installation of the motor and the speed reducer.

[0049] Figure 1 The support frame 1 shown in the drawings is a U-shaped frame (preferably a split structure, so as to facilitate assembly and disassembly of the rotating shaft 2 and the magnetic adsorption wheel module 3), the two ends of the rotating shaft 2 are rotatably connected with the opposite sides of the support frame 1 by means of rotating bearings 11, and the support frame 1 is provided with bearing covers 12 for limiting the axial movement of the rotating bearings 11; in this way, the stability and reliability of the installation of the rotating shaft 2 can be ensured. In addition, the structure of the mounting bracket 41 is not unique, and the U-shaped structure shown in the drawings is fixedly connected with the two sides of the support frame 1 at the two ends of the opening, in this way, the stability and reliability of the installation of the magnetic adsorption force adjusting device 4 can be ensured.

[0050] In addition, the rotating shaft 2 is made of a non-magnetic conductive material, and the magnetic short-circuit block 42 is made of a soft magnetic material. The magnetic adsorption wheel module 3 can be arranged one, two or more than two according to the needs.

[0051] In one specific embodiment, by Figure 3 As shown, the adjustment structure includes at least two adjusting screws 43 spaced apart on the mounting bracket 41, one end of which is threadedly connected to the magnetic short-circuit block 42. By rationally designing the contact surface between the magnetic short-circuit block 42 and the outer circle of the magnetic guide wheel, and adjusting the proximity distance between them by turning the adjusting screws 43, the magnitude of the magnetic attraction force between the magnetic guide wheel and the working surface 7 can be adjusted within a certain range. This facilitates the detachment of the magnetic attraction wheel assembly from the working surface 7 and avoids accidents that may occur due to the sudden loss of magnetic attraction force. The size of the magnetic short-circuit block 42 must match the magnitude of the attraction force of the permanent magnet 32. A permanent magnet 32 ​​with a large magnetic force requires a correspondingly larger cross-sectional area of ​​the magnetic short-circuit block 42 (i.e., positively correlated) to ensure that magnetic saturation does not occur. Preferably, the magnetic short-circuit block 42 is provided with a concave arc surface 421 for fitting and abutting against the outer peripheral wall of the magnetic guide wheel and a clearance opening 422 corresponding to the permanent magnet 32. The concave arc surface 421 can increase the contact area with the magnetic guide wheel, reduce magnetic resistance, and help increase the adjustment range of the magnetic attraction force. In addition, in some embodiments (not shown in the figure), the adjustment structure is a telescopic rod, an electric push rod or other linear drive structure, as long as it can drive the magnetic short-circuit block 42 to move toward or away from the magnetic guide wheel, and there are no restrictions here.

[0052] It should be noted that when there are two or more magnetic adsorption wheel modules 3, each magnetic short-circuit block 42 needs to be provided with multiple concave arc surfaces 421 corresponding to all the magnetic guide wheels and multiple clearance openings 422. Alternatively, multiple magnetic short-circuit blocks 42 and adjustment structures can be provided, corresponding to the magnetic adsorption wheel modules 3.

[0053] In another specific embodiment, by Figure 2 As shown, the radial dimension of the magnetic guide wheel is 1-15 mm larger than that of the permanent magnet 32. A flexible sleeve 35 is provided around the outer periphery of the permanent magnet 32 ​​to increase friction with the working surface 7. The radial dimension of the flexible sleeve 35 is 0.1-3 mm larger than that of the magnetic guide wheel. The flexible sleeve 35 is preferably made of a flexible material such as rubber or polyurethane. Different patterns can also be made on the outer periphery of the flexible sleeve 35 to further increase the coefficient of friction. Alternatively, the flexible sleeve 35 can be pre-manufactured independently and fitted onto the outer periphery of the permanent magnet 32 ​​during assembly; or it can be manufactured using a coating process after the overall assembly is completed.

[0054] In operation, the outer periphery of the first magnetic guide wheel 33 and the second magnetic guide wheel 34 is attached to the working surface 7, and together with the permanent magnet 32, a complete magnetic circuit is formed, which minimizes the air gap and magnetic resistance, and generates a normal attractive force N along the working surface 7. The normal attractive force N is converted into a tangential friction force F through the friction between the flexible sleeve 35 and the working surface 7, and further forms a driving force required for climbing on the working surface 7, the maximum static friction force F = uN, wherein u is the friction coefficient of the contact surface. The contact between the first magnetic guide wheel 33, the second magnetic guide wheel 34 and the working surface 7 is smooth steel-to-steel contact, and the friction coefficient is very small (generally not more than 0.15). The outer diameter of the flexible sleeve 35 is slightly larger than the outer diameter of the magnetic guide wheel, and under the action of the normal attractive force N, the flexible sleeve 35 is tightly pressed against the working surface 7 and slightly deformed, forming a "surface contact" with the working surface 7, thereby effectively increasing the friction coefficient u (for example, the friction coefficient between rubber and steel is 0.6-0.8), and further providing sufficient and stable maximum static friction force F, effectively avoiding the occurrence of skidding. In addition, the flexible sleeve 35 is surrounded by the first magnetic guide wheel 33, the second magnetic guide wheel 34 and the permanent magnet 32, so it is not easy to fall off under stress. In short, in this embodiment, the flexible sleeve 35 has appropriate radial elasticity, tangential flexibility and strength, which can both increase friction to prevent skidding and prevent falling off.

[0055] In another specific embodiment, the support frame 1 is provided with an adsorption wheel cleaning device 5, which is used to peel off the sundries adsorbed on the outer periphery of the magnetic guide wheel and adsorb and recycle the peeled sundries when the magnetic guide wheel rotates. The adsorption wheel cleaning device 5 includes a scraper 51 and a magnetic attraction piece 52, the scraper 51 includes a fixed section and an inclined section connected together, the fixed section is installed on the support frame 1, and the magnetic attraction piece 52 is installed on the fixed section; the inclined section is provided with a notch portion for avoiding the flexible sleeve 35 (to avoid scratching the flexible sleeve 35) and a scraper edge abutting against the outer peripheral wall of the magnetic guide wheel, and the inclination direction of the inclined section and the tangent direction of the abutting place of the magnetic guide wheel form a set angle. In this way, some rust, welding slag, scrap iron and the like adsorbed on the magnetic guide wheel can be timely removed, ensuring the adsorption stability, transmission reliability and motion control accuracy of the magnetic adsorption wheel assembly.

[0056] Preferably, two adsorption wheel cleaning devices 5 are symmetrically arranged on the support frame 1 (with the center axis of the rotation shaft 2 as the center of symmetry); in this way, whether the magnetic guide wheel rotates forward or reversely, some rust, welding slag, scrap iron and the like adsorbed on the magnetic guide wheel can be cleaned by the corresponding adsorption wheel cleaning device 5, improving the effect of sundry cleaning. The two adsorption wheel cleaning devices 5 can be selectively installed above the support frame 1; or can be selectively installed below the support frame 1 (close to the position of the working surface 7 to be adsorbed, so that the sundries adsorbed from the working surface 7 can be quickly removed).

[0057] In another specific embodiment, theFigure 2 As shown, the annular positioning structure (for the convenience of understanding the technical solutions, the annular positioning structure in this embodiment is referred to as a first annular positioning structure 31) is an integral molding structure with the rotating shaft, the first annular positioning structure 31 is provided with an annular limiting portion 39 for axially limiting the permanent magnet 32, the first magnetic conducting wheel 33 is arranged adjacent to the annular limiting portion 39 and is provided with a avoiding slot thereon; the first magnetic conducting wheel 33 and the second magnetic conducting wheel 34 are both provided with a plurality of circumferentially spaced mounting through holes and a plurality of axially penetrating and circumferentially spaced tightening screw holes (the tightening screw holes on the first magnetic conducting wheel 33 are referred to as first tightening screw holes 331, and the tightening screw holes on the second magnetic conducting wheel 34 are referred to as second tightening screw holes 341); the tightening screw holes are flush with the end face of the first annular positioning structure 31; both ends of the first annular positioning structure 31 are provided with a plurality of threaded mounting holes; the threaded mounting holes on both sides correspond to the mounting through holes on the two magnetic conducting wheels one by one. This embodiment is only suitable for the installation of one magnetic adsorption wheel module 3 on the rotating shaft 2. Alternatively, the mounting through holes and the tightening screw holes on the magnetic conducting wheel are respectively provided with three equidistant ones, the centers of the mounting through holes and the tightening screw holes are arranged on the same circumference, and the mounting through holes and the tightening screw holes are staggered, and the angle between the mounting through hole and the adjacent tightening screw hole is 60 degrees.

[0058] In another specific embodiment, as shown by Figure 4 and Figure 5 As shown, the annular positioning structure (for the convenience of understanding the technical solutions, the annular positioning structure in this embodiment is referred to as a second annular positioning structure 38) in the magnetic adsorption wheel module 3 is connected with the rotating shaft 2 by means of a flat key 6, and includes a shaft sleeve 381 and an annular positioning body 382 arranged at the intermediate position of the shaft sleeve 381, and the annular limiting portion 39 is arranged on the outer circumferential portion of one end of the annular positioning body 382; the threaded mounting holes are arranged on the annular positioning body 382. In this way, the assembly and disassembly of the plurality of magnetic adsorption wheel modules 3 on the rotating shaft 2 can be facilitated. Preferably, the annular limiting portion 39, the annular positioning body 382 and the shaft sleeve 381 are an integral molding structure.

[0059] The embodiment of the application also discloses an assembly and disassembly method of the magnetic adsorption wheel assembly for assembling or disassembling the magnetic adsorption wheel assembly; wherein the assembly and disassembly method comprises a magnetic adsorption wheel module assembly step and a magnetic adsorption wheel module disassembly step; as shown by Figure 6 As shown, the magnetic adsorption wheel module assembly step comprises:

[0060] S1, the permanent magnet 32 is installed on the annular positioning structure, and one end face of the permanent magnet 32 abuts against the annular limiting portion 39. If the flexible sleeve 35 is a separate piece, it can be directly installed on the permanent magnet 32 at this step.

[0061] S2, screw the set screw in the set screw hole (the first set screw hole 331) of the first magnetic wheel 33, and make the end of the set screw protrude from the first magnetic wheel 33 to the side of the permanent magnet 32 by a certain length A (about 10mm, the specific size value is adjusted according to the suction force of the permanent magnet 32).

[0062] S3, the end of the set screw protruding end is abutted on one end face of the annular positioning structure (abutted on the end face of the first annular positioning structure 31 in the first annular positioning structure 31, or abutted on the end face of the annular positioning body 382 in the second annular positioning structure 382), and then the set screw is screwed, the first magnetic wheel 33 moves to the permanent magnet 32 and is finally adsorbed with the permanent magnet 32, and the set screw is removed; the first threaded connecting piece 36 is connected with the corresponding threaded mounting hole of the annular positioning structure through the mounting hole of the first magnetic wheel 33. Figure 2 Figure 5

[0063] When the set screw is screwed, the position of the first magnetic wheel 33 needs to be adjusted in real time to ensure that the mounting hole is aligned with the threaded mounting hole.

[0064] When the first magnetic wheel 33 approaches the permanent magnet 32, the magnetic attraction between the two has the tendency to accelerate the approach, but the permanent magnet 32 cannot move freely to one side due to the restriction of the annular limiting part 39, and the set screw installed on the first magnetic wheel 33 also abuts on the end face of the annular positioning structure and cannot move freely to the other side, so that the distance between the permanent magnet 32 and the first magnetic wheel 33 can be kept about 10mm without being immediately attached, and the distance between the first magnetic wheel 33 and the permanent magnet 32 can be slowly adjusted by the set screw, so that the permanent magnet 32 can be prevented from being broken by the rapidly approaching magnetic wheel.

[0065] S4, screw the set screw (which can be directly used from the first magnetic wheel 33) in the set screw hole (the second set screw hole 341) of the second magnetic wheel 34, and make the end of the set screw protrude from the second magnetic wheel 34 to the side of the permanent magnet 32 by a certain length A.

[0066] S5, the end of the set screw protruding end is abutted on the other end face of the annular positioning structure, and then the set screw is screwed, the second magnetic wheel 34 moves to the permanent magnet 32 and is finally adsorbed with the permanent magnet 32, and the set screw is removed; the second threaded connecting piece 37 is connected with the corresponding threaded mounting hole of the annular positioning structure through the mounting hole of the second magnetic wheel 34.

[0067] When the set screw is screwed, the position of the second magnetic wheel 34 needs to be adjusted in real time to ensure that the mounting hole is aligned with the threaded mounting hole.

[0068] ​​It is known that the permanent magnet 32 is a brittle material, and collision and local pressure can cause breakage; and the method of using the locking screw to gradually adjust the distance between the magnetic wheel and the permanent magnet 32 during assembly can effectively avoid the phenomenon that the magnetic wheel collides with the permanent magnet 32 and even injures people; and the locking screw is on the annular positioning structure, and will not damage the permanent magnet 32.

[0069] The magnetic adsorption wheel module disassembly steps include:

[0070] S6, the first magnetic wheel 33 and the first threaded connection piece 36 on the annular positioning structure, the second magnetic wheel 34 and the second threaded connection piece 37 on the annular positioning structure are taken off.

[0071] S7, the second magnetic wheel 34 is disassembled from the annular positioning structure by means of the locking screw.

[0072] Specifically, the locking screw is screwed into the second locking screw hole 341 of the second magnetic wheel 34; the end of the locking screw abuts against the annular positioning structure, and then the locking screw is screwed, so that the second magnetic wheel 34 moves away from the permanent magnet 32 and is finally separated from the permanent magnet 32. Since the permanent magnet 32 is adsorbed and fixed with the first magnetic wheel 33, when the locking screw is screwed, the permanent magnet 32 can be easily separated from the second magnetic wheel 34 by slightly pressing the permanent magnet 32 with the hand.

[0073] S8, the first magnetic wheel 33 is disassembled from the annular positioning structure by means of the locking screw.

[0074] The locking screw is screwed into the first locking screw hole 331 of the first magnetic wheel 33; the end of the locking screw abuts against the annular positioning structure, and then the locking screw is screwed, so that the first magnetic wheel 33 moves away from the permanent magnet 32 and is finally separated from the permanent magnet 32. Since the permanent magnet 32 is limited by the annular limiting portion 39; therefore, when the locking screw is screwed, the permanent magnet 32 will not move with the first magnetic wheel 33, facilitating disassembly.

[0075] S9, the permanent magnet 32 is taken off from the annular positioning structure.

[0076] Through the above method, the magnetic adsorption wheel module can be disassembled, the damaged permanent magnet 32 can be replaced in time, and the above disassembly method will not damage the permanent magnet 32 and the magnetic wheel. When the permanent magnet 32 is demagnetized due to bad environment, it can be reused after being remagnetized, saving maintenance cost.

[0077] The application discloses two structural forms of annular positioning structures; and only the differences in assembly steps of the two annular positioning structures are described:

[0078] When the first annular positioning structure 31 is Figure 2When the structure shown is that the first annular positioning structure 31 and the rotating shaft 2 are integrally formed; before step S3, the first magnetic guide wheel 33 needs to be sleeved on the rotating shaft 2 after step S2; before step S5, the second magnetic guide wheel 34 needs to be sleeved on the rotating shaft 2 after step S4. After the magnetic adsorption wheel module 3 is assembled, the rotating shaft 2 is installed on the support frame 1; if the pre-installation of the support frame 1 does not interfere with the assembly of the magnetic adsorption wheel module 3, the rotating shaft 2 can also be installed on the support frame 1 first, and then the magnetic adsorption wheel module 3 is assembled; this is not limited.

[0079] When the second annular positioning structure 38 is Figure 5 When the structure shown is that the second annular positioning structure 38 includes the shaft sleeve 381 and the annular positioning body 382 arranged on the shaft sleeve 381; before step S3, the first magnetic guide wheel 33 needs to be sleeved on the shaft sleeve 381 after step S2; before step S5, the second magnetic guide wheel 34 needs to be sleeved on the shaft sleeve 381 after step S4. After the magnetic adsorption wheel module 3 is assembled, the magnetic adsorption wheel module 3, the support frame 1 and the rotating shaft 2 are assembled; since the shaft sleeve 381 is keyed connected with the rotating shaft 2, it is more convenient to assemble multiple magnetic adsorption wheel modules 3 on the rotating shaft 2.

[0080] Each embodiment in the specification is described in a progressive or parallel manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between each embodiment can be referred to.

[0081] In summary, the magnetic adsorption force adjusting device is arranged to adjust the magnetic adsorption force between the magnetic guide wheel and the working surface, so that the magnetic adsorption wheel and the working surface are separated; in addition, the flexible sleeve is arranged on the permanent magnet and does not affect the magnetic adsorption force; and the reasonable size selection of the flexible sleeve makes it in contact with the working surface, improves the friction coefficient, prevents the slipping phenomenon and is not easy to fall off; furthermore, the setting of the adsorption wheel cleaning device can clean the adsorbed sundries on the magnetic guide wheel in time, ensures the adsorption stability, the reliability of transmission and the accuracy of motion control of the magnetic adsorption wheel assembly, and finally, the magnetic adsorption wheel module can be simply, quickly and non-damaged assembled by means of the set screw and the threaded connecting piece.

[0082] The above only describes the preferred embodiments of the present application and does not limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A magnetic adsorption wheel assembly, comprising a support frame, a rotating shaft rotatably installed on the support frame, and a magnetic adsorption wheel module synchronously rotating with the rotating shaft; characterized in that, The magnetic adsorption wheel module comprises an annular positioning structure arranged on the rotary shaft, a permanent magnet arranged around the outer periphery of the annular positioning structure, and two magnetic guide wheels, wherein the two magnetic guide wheels are arranged at opposite ends of the permanent magnet and are fixedly connected with the annular positioning structure; The support frame is provided with a magnetic attraction force adjusting device for adjusting the magnetic attraction force between the magnetic guide wheel and the working surface; the magnetic attraction force adjusting device comprises a mounting bracket arranged on one side of the support frame, a magnetic short-circuit block arranged on the side of the mounting bracket facing the magnetic guide wheel, and an adjusting structure arranged on the mounting bracket for driving the magnetic short-circuit block to move towards or away from the magnetic guide wheel; The annular positioning structure is provided with an annular limiting portion for axially limiting the permanent magnet, and the magnetic guide wheel adjacent to the annular limiting portion is provided with an avoiding slot; each magnetic guide wheel is provided with a plurality of circumferentially spaced mounting through holes and a plurality of axially penetrating and circumferentially spaced tightening screw holes; the tightening screw holes correspond to the end faces of the annular positioning structure; the annular positioning structure is provided with a plurality of threaded mounting holes at both ends; the threaded mounting holes on both sides correspond to the mounting through holes on the two magnetic guide wheels respectively; The assembly and disassembly method of the magnetic attraction wheel assembly is used for assembling or disassembling the magnetic attraction wheel assembly; the magnetic guide wheel provided with the avoiding slot in the same magnetic attraction wheel module is a first magnetic guide wheel, and the other magnetic guide wheel is a second magnetic guide wheel; The assembly and disassembly method comprises a magnetic attraction wheel module assembly step; The magnetic attraction wheel module assembly step comprises: S1, mounting the permanent magnet on the annular positioning structure, and abutting one end face of the permanent magnet against the annular limiting portion; S2, rotating a tightening screw into the tightening screw hole of the first magnetic guide wheel, and making the end of the tightening screw protrude from one side of the first magnetic guide wheel towards the permanent magnet by a certain length A; S3, abutting the end of the protruding end of the tightening screw against one end face of the annular positioning structure, then rotating the tightening screw, moving the first magnetic guide wheel towards the permanent magnet and finally adsorbing the first magnetic guide wheel with the permanent magnet, removing the tightening screw, and connecting the first threaded connecting piece through the mounting through hole of the first magnetic guide wheel with the corresponding threaded mounting hole on the annular positioning structure; S4, rotating a tightening screw into the tightening screw hole of the second magnetic guide wheel, and making the end of the tightening screw protrude from one side of the second magnetic guide wheel towards the permanent magnet by a certain length A; S5, abutting the end of the protruding end of the tightening screw against the other end face of the annular positioning structure, then rotating the tightening screw, moving the second magnetic guide wheel towards the permanent magnet and finally adsorbing the second magnetic guide wheel with the permanent magnet, removing the tightening screw, and connecting the second threaded connecting piece through the mounting through hole of the second magnetic guide wheel with the corresponding threaded mounting hole on the annular positioning structure.

2. The magnetic attraction wheel assembly of claim 1, wherein, The adjusting structure comprises at least two adjusting screws arranged at intervals on the mounting frame, one end of the adjusting screw is in threaded connection with the magnetic short circuit block; the magnetic short circuit block is provided with an inner concave circular arc surface for abutting against the outer peripheral wall of the magnetic conducting wheel and a clearance corresponding to the permanent magnet.

3. The magnetic attraction wheel assembly of claim 1, wherein, The radial dimension of the magnetic conducting wheel is 1-15 mm larger than the radial dimension of the permanent magnet; A flexible sleeve for increasing the friction between the outer peripheral part of the permanent magnet and the working surface is arranged on the outer peripheral part of the permanent magnet, the radial dimension of the flexible sleeve is 0.1-3 mm larger than the radial dimension of the magnetic conducting wheel.

4. The magnetic attraction wheel assembly of claim 1, wherein, The support frame is provided with an adsorption wheel cleaning device, when the magnetic conducting wheel rotates, the adsorption wheel cleaning device is used to peel off the sundries adsorbed on the outer peripheral part of the magnetic conducting wheel and adsorb and recycle the peeled sundries.

5. The magnetic attraction wheel assembly of claim 4, wherein, The adsorption wheel cleaning device comprises a scraper and a magnetic adsorption piece, the scraper comprises a fixed segment and an inclined segment connected with each other, the fixed segment is mounted on the support frame, and the magnetic adsorption piece is mounted on the fixed segment; the inclined segment is provided with a notch part corresponding to the permanent magnet and a scraper blade abutting against the outer peripheral part of the magnetic conducting wheel, and the inclined direction of the inclined segment and the tangent direction of the abutting part of the magnetic conducting wheel form a set angle.

6. The magnetic attraction wheel assembly of claim 1, wherein, The annular positioning structure and the rotary shaft are an integral forming structure; Before step S3, the first magnetic conducting wheel needs to be sleeved on the rotary shaft; Before step S5, the second magnetic conducting wheel needs to be sleeved on the rotary shaft.

7. The magnetic attraction wheel assembly of claim 1, wherein, The annular positioning structure and the rotary shaft are connected through a key; the key comprises a shaft sleeve and an annular positioning body arranged on the shaft sleeve; the annular limiting part is arranged on the outer peripheral part of one end of the annular positioning body; the threaded mounting hole is arranged on the annular positioning body; Before step S3, the first magnetic conducting wheel needs to be sleeved on the shaft sleeve; Before step S5, the second magnetic conducting wheel needs to be sleeved on the shaft sleeve.

8. The magnetic attraction wheel assembly of claim 1, wherein, The assembly and disassembly method further comprises a magnetic adsorption wheel module disassembly step, the magnetic adsorption wheel module disassembly step comprises: S6, the first threaded connecting piece on the first magnetic conducting wheel and the annular positioning structure, the second threaded connecting piece on the second magnetic conducting wheel and the annular positioning structure are taken off; S7, the second magnetic conducting wheel is disassembled from the annular positioning structure by means of the set screw; S8, the first magnetic conducting wheel is disassembled from the annular positioning structure by means of the set screw; S9, the permanent magnet is taken off from the annular positioning structure.

Images