Switch type permanent magnetic chuck with magnetism gathering structure

Abstract

The utility model relates to the technical field of magnetic suction devices, in particular to a switch type magnetism gathering structure permanent magnetic chuck which comprises a magnetism gathering structure, a fixed magnet and a rotary magnet, the magnetism gathering structure is provided with at least two installation cavities, the two installation cavities are symmetrically arranged along the central axis, and a magnetism gathering part is arranged between the two installation cavities; the fixed magnets penetrate through the mounting cavity and are connected to one side of the mounting cavity, and the opposite magnetic poles of the adjacent fixed magnets are the same; the rotating magnet penetrates through the mounting cavity and is connected to the other side of the mounting cavity, the bottom surface of the rotating magnet is connected to the bottom surface of the fixed magnet, and the rotating magnet and the fixed magnet are coaxially arranged. The utility model aims to improve the suction force of the sucker, so that the sucker has more application scenes.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic suction devices, in particular to a permanent magnetic suction cup with a switchable magnetic focusing structure. Background Art

[0002] Permanent magnetic chucks, also known as magnetic chucks, are widely used in machining centers, mold factories, and other fields. They significantly improve the efficiency of clamping magnetic steel materials. Permanent magnetic chucks are based on the high-performance rare earth material NdFeB (N>40) as their core. By manually turning the chuck's handle, the magnetic system within the NdFeB magnet is altered, effectively holding or releasing the workpiece.

[0003] The permanent magnetic suction cups widely used today are usually composed of an iron yoke made of magnetic material, a fixed magnet and a rotatable magnet. The two magnets are arranged side by side and clamped by the iron yoke. When the rotatable magnet rotates to the same magnetic pole direction as the fixed magnet, the suction force can be increased, and vice versa, the suction force can be reduced. This type of permanent magnetic suction cup can only generate sufficient suction force when there is close contact between the iron yoke and the object being sucked, which limits its scope of use. Utility Model Content

[0004] The main purpose of the utility model is to provide a switch-type permanent magnetic suction cup with a magnetic concentrating structure, aiming to improve the suction force of the suction cup and make it have more application scenarios.

[0005] To achieve the above-mentioned purpose, the present invention proposes a switchable magnetic concentrating structure permanent magnetic chuck, comprising a magnetic concentrating structure, a fixed magnet, and a rotating magnet:

[0006] The magnetic concentrating structure is provided with an installation cavity, and at least two installation cavities are provided. The two installation cavities are symmetrically arranged along the central axis, and a magnetic concentrating portion is provided between the two installation cavities.

[0007] The fixed magnet is disposed in the mounting cavity and connected to one side of the mounting cavity, and the relative magnetic poles of adjacent fixed magnets are the same;

[0008] The rotating magnet is disposed through the mounting cavity and connected to the other side of the mounting cavity. The bottom surface of the rotating magnet is connected to the bottom surface of the fixed magnet and is coaxially arranged with the fixed magnet.

[0009] When the magnetic poles of the rotating magnet and the connected fixed magnet are in the same direction, the permanent magnetic chuck is in an adsorption state;

[0010] When the magnetic poles of the rotating magnet and the magnetic poles of the connected fixed magnet are in opposite directions, the permanent magnetic chuck is in a released state.

[0011] In one embodiment of the present application, the magnetic focusing structure includes a magnetic conductive block and a magnetic focusing block:

[0012] The magnetic conducting block is connected to the end of the magnetic concentrating structure, and the magnetic conducting block is connected to one side magnetic pole of the fixed magnet.

[0013] The other side magnetic pole of the fixed magnet is connected to the end face of the magnetic concentrating block facing the magnetic conducting block, and the magnetic concentrating block away from the end face of the fixed magnet is provided with the magnetic concentrating part, and the installation cavity is formed between the magnetic concentrating block and the magnetic conducting block.

[0014] In an embodiment of the present application, the protective part is arranged near the magnetic concentrating part on the end face of the installation cavity, the protective part is connected to the edge of the installation cavity, the diameter of the fixed magnet is smaller than the maximum distance between adjacent protective parts, and the protective part wraps around one side of the fixed magnet.

[0015] In an embodiment of the present application, the positive pole of the fixed magnet is arranged to face the magnetic conducting block, and the negative pole is arranged to face the magnetic concentrating block, and the magnetic induction lines of the adjacent fixed magnets are arranged to face the magnetic concentrating part.

[0016] In an embodiment of the present application, the fixed magnet is a cylinder, and the diameter of the fixed magnet is smaller than the height of the magnetic conducting block.

[0017] In an embodiment of the present application, the magnetic concentrating structure is an iron yoke composed of a magnetic conducting material, and the fixed magnet and the rotating magnet are composed of permanent magnets.

[0018] By adopting the above technical scheme, the present application has the following advantages:

[0019] 1. By relatively arranging two groups of installation cavities in the magnetic concentrating structure, two fixed magnets with opposite magnetic pole directions can be relatively installed in the magnetic concentrating structure, and the magnetic pole directions of the installed fixed magnets are opposite, which means that the magnetic poles of the opposite side faces of the two installed fixed magnets are the same, and the magnetic induction lines will intersect between the two fixed magnets, which specifically means that the magnetic property of the magnetic concentrating part in the middle of the magnetic concentrating structure is enhanced, and the suction force of the suction cup is improved by this way, so that the suction cup can stably suck the object even if there is a certain gap between the suction cup and the object.

[0020] 2. The rotating magnet is installed on the other side of the fixed magnet opposite to the installation cavity, the rotating magnet and the fixed magnet are coaxially arranged and can rotate relative to the fixed magnet, when the magnetic pole directions of the two connected magnets are opposite, the magnetic field is short-circuited through the magnetic concentrating structure, and a very low intensity magnetic field is generated on the working surface, so that the adsorption force on the adsorbed workpiece is weak, to realize the release function; on the contrary, when the magnetic pole directions of the two connected magnets are the same, the two magnets and the magnetic concentrating structure form a specially designed magnetic concentrating magnetic circuit structure, which generates a high-intensity magnetic field on the magnetic concentrating part, and generates a strong adsorption force on the adsorbed workpiece, to realize the strong adsorption function of the workpiece. Through this structure, the suction force of the suction cup can be effectively improved, so that the suction cup has more application scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor.

[0022] Figure 1 It is a structural schematic view of the switch type magnetic concentration structure permanent magnetic chuck of the present application.

[0023] Figure 2 It is a sectional view of the switch type magnetic concentration structure permanent magnetic chuck of the present application.

[0024] Explanation of reference numerals:

[0025] 1, magnetic concentration structure; 11, mounting cavity; 2, magnetic block; 21, protection part; 3, magnetic concentration block; 31, magnetic concentration part; 4, fixed magnet; 5, rotating magnet.

[0026] The realization, functional features and advantages of the present application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application.

[0028] Reference Figures 1 to 2 In order to achieve the above purpose, the present application provides a switch type magnetic concentration structure 1 permanent magnetic chuck, which comprises a magnetic concentration structure 1, a fixed magnet 4 and a rotating magnet 5. The magnetic concentration structure 1 is provided with a mounting cavity 11. The mounting cavity 11 is provided with at least two mounting cavities 11. The two mounting cavities 11 are symmetrically arranged along the central axis. The magnetic concentration part 31 is arranged between the two mounting cavities 11. The fixed magnet 4 is arranged in the mounting cavity 11 and connected to one side of the mounting cavity 11. The opposite poles of the adjacent fixed magnets 4 are the same. The rotating magnet 5 is arranged in the mounting cavity 11 and connected to the other side of the mounting cavity 11. The bottom surface of the rotating magnet 5 is connected to the bottom surface of the fixed magnet 4 and coaxially arranged with the fixed magnet 4. When the magnetic pole of the rotating magnet 5 and the magnetic pole of the connected fixed magnet 4 are the same, the permanent magnetic chuck is in the adsorbing state. When the magnetic pole of the rotating magnet 5 and the magnetic pole of the connected fixed magnet 4 are opposite, the permanent magnetic chuck is in the releasing state.

[0029] By arranging two groups of mounting cavities 11 relatively in the magnetic focusing structure 1, two fixed magnets 4 with their poles facing opposite directions can be relatively installed in the magnetic focusing structure 1. The opposite directions of the installed magnetic poles mean that the poles of the opposite sides of the two fixed magnets 4 are the same after installation, and the magnetic induction lines will intersect between the two. Specifically, the magnetism is enhanced on the magnetic focusing part 31 in the middle of the magnetic focusing structure 1. In this way, the suction force of the suction cup is improved, so that the object can be stably attracted even if there is a certain gap between it and the object to be attracted.

[0030] The rotating magnet 5 is installed on the other side of the mounting cavity 11 relative to the fixed magnet 4. The rotating magnet 5 and the fixed magnet 4 are coaxially arranged and can rotate relative to the fixed magnet 4. When the two connected magnetic poles are in opposite directions, the magnetic field is short-circuited through the magnetic focusing structure 1, which will generate a very low-intensity magnetic field on the working surface, and the adsorption force on the adsorbed workpiece is weak, so as to realize the release function; on the contrary, when the two connected magnetic poles are in the same direction, the two magnets and the magnetic focusing structure 1 are combined into a specially designed magnetic focusing circuit structure, which will generate a high-intensity magnetic field on the magnetic focusing part 31, generating a strong adsorption force on the adsorbed workpiece, and realizing the strong adsorption function of the workpiece. Through this structure, the suction force of the suction cup can be effectively improved, so that it has more application scenarios.

[0031] Combined with attachment Figures 1 to 2 Two magnetic focusing parts 31 are provided on the permanent magnetic chuck. Both magnetic focusing parts 31 have strong magnetism and can absorb objects. The two block-shaped objects facing the magnetic focusing parts 31 in the two figures are simulated objects to be absorbed.

[0032] See also Figure 1 In one embodiment of the present application, the magnetic focusing structure 1 includes a magnetic conductive block 2 and a magnetic focusing block 3. The magnetic conductive block 2 is connected to the end of the magnetic focusing structure 1, and the magnetic conductive block 2 is connected to one side pole of the fixed magnet 4; the end surface of the magnetic focusing block 3 facing the magnetic conductive block 2 is connected to the other side pole of the fixed magnet 4, and the end surface of the magnetic focusing block 3 away from the fixed magnet 4 is provided with a magnetic focusing portion 31, and an installation cavity 11 is formed between the magnetic focusing block 3 and the magnetic conductive block 2.

[0033] With the help of the fixed magnet 4, the suction cup is in an adsorbed state, and the magnetic fields of the fixed magnet 4 and the rotating magnet 5 will converge at the two ends of the magnetic block 3 away from the mounting cavity 11. These two ends are also the magnetic focusing parts 31. The magnetic conductive block 2 is used to install the fixed magnet 4 and the rotating magnet 5, and limit the rotating magnet 5 so that it rotates without derailing. The magnetic conductive block 2 can facilitate the conduction of the magnetic field of the magnet, reduce magnetic leakage, and improve the magnetic focusing effect of the magnetic focusing part 31.

[0034] See also Figures 1 to 2In an embodiment of the present application, the magnetic conducting block 2 is provided with a protection part 21 close to the magnetic concentrating part 31 at the end face of the installation cavity 11, the protection part 21 is connected to the edge of the installation cavity 11, the diameter of the fixed magnet 4 is smaller than the maximum distance between adjacent protection parts 21, and the protection part 21 is wrapped around one side of the fixed magnet 4.

[0035] The protection part 21 is arranged so that the installation cavity 11 cooperates with the protection part 21 to completely cover the magnet inside, avoiding direct impact of the object to be attracted on the magnet to cause damage to the magnet. By arranging the protection part 21, the height of the magnetic concentrating structure 1 is higher than the diameter of the magnet, so that the fixed magnet 4 and the rotating magnet 5 can work more stably.

[0036] In combination with the drawings, Figure 1 In an embodiment of the present application, the positive pole of the fixed magnet 4 is arranged towards the magnetic conducting block 2, and the negative pole is arranged towards the magnetic concentrating block 3. The magnetic induction lines of adjacent fixed magnets 4 are arranged towards the magnetic concentrating part 31.

[0037] The negative pole of the fixed magnet 4 is arranged towards the magnetic concentrating block 3, and the positive pole is arranged towards the magnetic conducting part. The magnetic field of the magnet comes out of the magnetic conducting part, which can also reduce the magnetic leakage in this direction, and is used to guide the direction of the magnetic field, so that the magnetic field direction converges on the magnetic concentrating part 31, which can effectively enhance the magnetic field and improve the adsorption effect of the suction cup.

[0038] In combination with the drawings, Figures 1 to 2 In an embodiment of the present application, the fixed magnet 4 is a cylinder, and the diameter of the fixed magnet 4 is smaller than the height of the magnetic conducting block 2.

[0039] The fixed magnet 4 and the rotating magnet 5 are cylinders, which can protect the magnet with the protection part 21 and make the magnet as close as possible to the magnetic concentrating part 31 to improve the magnetic field strength, and make the whole structure easy to install and rotate.

[0040] In combination with the drawings, Figures 1 to 2 In an embodiment of the present application, the magnetic concentrating structure 1 is an iron yoke made of magnetic conducting material, and the fixed magnet 4 and the rotating magnet 5 are made of permanent magnet.

[0041] The magnetic conducting material can facilitate the magnetic conducting block 2 to conduct the magnetic field, and also facilitate the magnetic concentrating part 31 of the magnetic concentrating block 3 to concentrate the magnetic field and enhance the magnetic field. By cooperation of the magnetic conducting material and the permanent magnet, a permanent magnet suction cup convenient for adjustment and switching is formed, which can effectively improve the user experience.

[0042] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components; in the description of the present application, it is understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationships in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present patent, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0043] The above is only a preferred embodiment of the present application, and is not used to 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 switch-type permanent magnetic chuck with a magnetic focusing structure, characterized in that: include: A magnetic concentrating structure, wherein the magnetic concentrating structure is provided with an installation cavity, at least two installation cavities are provided, the two installation cavities are symmetrically arranged along the central axis, and a magnetic concentrating portion is provided between the two installation cavities; a fixed magnet, the fixed magnet being disposed through the mounting cavity and connected to one side of the mounting cavity, wherein adjacent fixed magnets have the same relative magnetic poles; a rotating magnet, the rotating magnet being disposed through the mounting cavity and connected to the other side of the mounting cavity, the bottom surface of the rotating magnet being connected to the bottom surface of the fixed magnet and being coaxially arranged with the fixed magnet; When the magnetic poles of the rotating magnet and the connected fixed magnet are in the same direction, the permanent magnetic chuck is in an adsorption state; When the magnetic poles of the rotating magnet and the magnetic poles of the connected fixed magnet are in opposite directions, the permanent magnetic chuck is in a released state.

2. A switchable magnetic concentrating structure permanent magnetic chuck according to claim 1, characterized in that: The magnetic focusing structure comprises: A magnetic conductive block, the magnetic conductive block is connected to an end of the magnetic concentrating structure, and the magnetic conductive block is connected to one side magnetic pole of the fixed magnet; and A magnetic focusing block, the end face of the magnetic focusing block facing the magnetic conductive block is connected to the other side magnetic pole of the fixed magnet, the end face of the magnetic focusing block away from the fixed magnet is provided with the magnetic focusing part, and an installation cavity is formed between the magnetic focusing block and the magnetic conductive block.

3. A switchable magnetic concentrating structure permanent magnetic chuck according to claim 2, characterized in that: A protective portion is provided on the end face of the magnetic conductive block facing the installation cavity, close to the magnetic focusing portion, and the protective portion is connected to the edge of the installation cavity. The diameter of the fixed magnet is smaller than the maximum distance between adjacent protective portions, and the protective portion is wrapped around one side of the fixed magnet.

4. A switchable magnetic concentrating structure permanent magnetic chuck according to claim 2, characterized in that: The positive pole of the fixed magnet is arranged toward the magnetic conductive block, the negative pole is arranged toward the magnetic focusing block, and the magnetic induction lines of adjacent fixed magnets are arranged toward the magnetic focusing portion.

5. A switchable magnetic concentrating structure permanent magnetic chuck according to claim 4, characterized in that: The fixed magnet is a cylinder, and the diameter of the fixed magnet is smaller than the height of the magnetic conductive block.

6. The switchable magnetic concentrating structure permanent magnetic chuck according to claim 1, characterized in that: The magnetic concentrating structure is an iron yoke made of magnetic conductive material, and the fixed magnet and the rotating magnet are made of permanent magnets.

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