Magnetic chuck structure

Abstract

The utility model provides a magnetic chuck structure. The magnetic chuck structure comprises an annular static chuck and an annular movable chuck. The movable chuck is rotatably arranged on the static chuck in a sleeving manner, and the movable chuck and the static chuck are concentrically arranged; a plurality of fixing grooves extending in the radial direction are formed in the static chuck at intervals, a clamping assembly capable of moving in the radial direction of the static chuck is arranged in each fixing groove, and one end of each clamping assembly extends into an inner cavity of the static chuck; a plurality of sets of magnetic assemblies are arranged on the movable chuck at intervals, and each set of magnetic assembly is magnetically connected with the corresponding clamping assembly and used for driving the multiple sets of clamping assemblies to move in the direction close to or away from the circle center of the static chuck so that the multiple sets of clamping assemblies can clamp or loosen the part to be clamped. The device is easy and flexible to operate, high in universality and wide in application range.

Description

Technical Field

[0001] The present application relates to the field of mechanical equipment, and in particular to a magnetic chuck structure. Background Art

[0002] The chuck locking mechanism is mostly used for clamping rotating parts, such as the clamping of parts in lathes and the clamping of tools in milling machines in the mechanical processing manufacturing industry; such as the clamping and fixing of optical mirrors by adapters in the medical endoscope industry, etc., and is used in various industries.

[0003] However, the existing chuck structures on the market basically all use mechanical transmission to clamp and fix objects. This clamping method has the characteristics of easy operation, excellent clamping performance, and not easy to fall off, but there are the following problems: ① With the increase of use time, the positioning accuracy gradually decreases due to the wear between the structural parts; ② Due to the existence of part processing tolerances, the coaxiality cannot be guaranteed. Therefore, how to design a chuck structure that is both wear-resistant and coaxial has become a problem faced by this field. Utility Model Content

[0004] One of the purposes of the present application is to provide a magnetic chuck structure, aiming to solve the problem of low positioning accuracy of existing mechanical clamps.

[0005] The technical solution of this application is:

[0006] A magnetic chuck structure comprises a static chuck and a dynamic chuck, both of which are annular; the dynamic chuck can be rotatably mounted on the static chuck and is arranged concentrically with the static chuck; a plurality of fixing grooves extending radially are arranged at intervals on the static chuck, each of the fixing grooves is provided with a clamping assembly that can move radially along the static chuck, and one end of each group of the clamping assemblies extends into the inner cavity of the static chuck; a plurality of groups of magnetic assemblies are arranged at intervals on the dynamic chuck, and each group of the magnetic assemblies is magnetically connected to the corresponding clamping assembly, so as to drive the plurality of groups of the clamping assemblies to move toward or away from the center of the static chuck, so that the plurality of groups of the clamping assemblies clamp or release the parts to be clamped.

[0007] As a technical solution of the present application, the clamping components include three groups, and the spacing between two adjacent groups of the clamping components is the same.

[0008] As a technical solution of the present application, the clamping assembly includes a moving magnet, a positioning column and a screw; the moving magnet is movably arranged in the fixing groove; the positioning column is arranged in the fixing groove, and one end is connected to the moving magnet through the screw, and the other end extends into the inner cavity of the static chuck, for clamping or loosening the clamped part.

[0009] As a technical solution of the present application, the magnetic assembly includes a first fixed magnet and a second fixed magnet, the first fixed magnet and the second fixed magnet are arranged on the moving chuck at intervals, and the first fixed magnet has the same magnetic property as the moving magnet, and the second fixed magnet has an opposite magnetic property to the moving magnet.

[0010] As a technical solution of the present application, the magnetic components include three groups, and the distances between two adjacent groups of the magnetic components are the same.

[0011] As a technical solution of the present application, it also includes a chuck cover arranged on the static chuck; a plurality of first connecting holes are arranged on the static chuck at intervals, a plurality of second connecting holes are arranged on the chuck cover at intervals, the first connecting holes and the second connecting holes are connected by screws; the chuck cover is also provided with connecting threads.

[0012] As a technical solution of the present application, the outer peripheral wall of the movable chuck has a wavy structure.

[0013] As a technical solution of the present application, the static chuck includes an integrally formed and coaxially arranged base and a positioning ring; the base is provided with a plurality of equally spaced notches along the circumferential direction, and the plurality of notches are located at the periphery of the dynamic chuck; the positioning ring is arranged in the middle of a surface of the base; the dynamic chuck is rotatably mounted on the positioning ring and is detachably connected to a rotating handle; the rotating handle is movably and adjustably arranged in the notch, and one end extends out of the notch.

[0014] As a technical solution of the present application, a limiting groove is provided on the circumferential side of one surface of the static chuck, and the length of the limiting groove is equal to the length of the magnetic component; a limiting pin matching the limiting groove is installed on the inner circumferential side of the dynamic chuck, and the limiting pin is movably and adjustably arranged in the limiting groove.

[0015] Beneficial effects of this application:

[0016] The magnetic chuck structure of the present application is simple to operate and has strong versatility. The device uses magnets to replace the traditional chuck structure, and uses the mutual repulsion between magnets to clamp the parts, and uses the attraction between magnets to loosen the parts. Different clamping forces are satisfied by changing the magnetic force of the magnets. At the same time, different types of positioning columns are used to clamp parts of different sizes and types. In addition, the device can ensure that the clamped parts are always in a centered state to prevent tilting through the stability of the same magnetic force. It can be seen that the device is simple to use, flexible to use, highly practical, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of a magnetic chuck provided in the first embodiment of the present application;

[0019] Figure 2 A schematic diagram of a magnetic chuck structure from a first angle provided in the first embodiment of the present application;

[0020] Figure 3 A schematic diagram of the structure of a magnetic chuck provided in the second embodiment of the present application;

[0021] Figure 4 This is a schematic diagram of the magnetic chuck structure provided in the third embodiment of the present application.

[0022] Icons: 1-static chuck; 2-moving chuck; 3-fixing groove; 4-moving magnet; 5-positioning column; 6-screw; 7-first fixed magnet; 8-second fixed magnet; 9-chuck cover; 10-base; 11-positioning ring; 12-notch; 13-turning handle; 14-limiting groove; 15-limiting pin. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] In addition, in the present application, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] First embodiment:

[0031] Please refer to Figure 1 , with reference Figure 2The present application provides a magnetic chuck structure, which mainly includes a static chuck 1, a dynamic chuck 2 and a chuck cover 9 which are both annular; the static chuck 1 has an integrally formed and coaxially arranged base 10 and a positioning ring 11; wherein the base 10 is provided with three equally spaced notches 12 along the circumferential direction, and the three notches 12 are located at the periphery of the dynamic chuck 2; at the same time, the positioning ring 11 is arranged in the middle of one surface of the base 10; the dynamic chuck 2 is rotatably sleeved on the positioning ring 11 and is arranged concentrically with the positioning ring 11, and a rotating handle 13 is detachably connected to one surface of the dynamic chuck 2; the rotating handle 13 is movably and adjustably arranged in the notch 12, and one end extends out of the notch 12, and the rotating handle 13 can be rotated along the extension direction of the notch 12, thereby driving the dynamic chuck 2 to rotate relative to the positioning ring 11. In addition, three fixing grooves 3 extending radially thereof are evenly spaced on the positioning ring 11 of the static chuck 1, and each fixing groove 3 is provided with a clamping assembly movable radially of the static chuck 1, and one end of each group of clamping assemblies extends into the inner cavity of the positioning ring 11 on the static chuck 1; at the same time, multiple groups of magnetic assemblies are arranged at intervals on the movable chuck 2, and each group of magnetic assemblies is magnetically connected to the corresponding clamping assembly, so as to drive the multiple groups of clamping assemblies to move toward or away from the center of the static chuck 1, so that the multiple groups of clamping assemblies clamp or release the parts to be clamped.

[0032] Furthermore, in this embodiment, the clamping components are in three groups, and the spacing between two adjacent groups of clamping components is the same; the clamping components mainly include a moving magnet 4, a positioning column 5 and a screw 6; wherein the moving magnet 4 is movably and detachably arranged in the fixing groove 3, and the purpose of the moving magnet 4 is to conduct magnetic force and provide power for clamping the rotating body; the positioning column 5 is detachably arranged in the fixing groove 3, and one end of the positioning column 5 is connected to the moving magnet 4 by a screw 6, and the other end extends to the inner cavity of the positioning ring 11, which is used to clamp or release the part to be clamped. The positioning column 5 moves in a set direction under the drive of the moving magnet 4 and finally clamps the rotating body, and the end face of the protruding part of the positioning column 5 is arc-shaped, and different types of positioning columns 5 can be selected for design according to rotating body parts with different outer diameter ranges. At the same time, the magnetic components are also used in three groups, and the spacing between two adjacent groups of magnetic components is the same; each group of magnetic components includes a first fixed magnet 7 and a second fixed magnet 8, which are spaced and detachably arranged on the moving chuck 2, and the first fixed magnet 7 has the same magnetic properties as the moving magnet 4, and the second fixed magnet 8 has the opposite magnetic properties to the moving magnet 4. In addition, a plurality of first connecting holes are spaced apart on the positioning ring 11 of the static chuck 1, and a plurality of second connecting holes are spaced apart on the chuck cover 9, and the first connecting holes and the second connecting holes are connected by screws 6. In addition, in order to ensure the stability of the magnetic force provided by the magnet group, it is necessary to ensure that the center lines of the first fixed magnet 7 and the moving magnet 4 are at the same height, and the center lines of the second fixed magnet 8 and the moving magnet 4 are at the same height.

[0033] In addition, in order to achieve stable cooperation between the various magnet groups and ensure ease of operation, a limiting groove 14 is opened on the circumferential side of one surface of the positioning ring 11. The length of the limiting groove 14 is equal to the length of a group of magnetic components, and the limiting groove 14 is located between two groups of magnetic components, and the distance between the limiting groove 14 and the two groups of magnetic components is the same; a limiting pin 15 that cooperates with the limiting groove 14 is installed on the inner circumferential side of the movable chuck 2, and the limiting pin 15 is movably and adjustably arranged in the limiting groove 14.

[0034] For clamped devices of different sizes, the moving magnet 4 can be selected in different models, and each model can clamp devices of different size ranges; and, in order to meet the needs of different clamping sizes, the number of models of the moving magnet 4 can also be reduced, and the length of the fixed slot 3 where the moving magnet 4 is located should be greater than the outer diameter variation range of the clamped device; and, in this embodiment, the number of clamping assemblies is three groups to ensure stability and coaxiality requirements during the clamping process. When the moving magnet 4 is subjected to repulsive or attractive forces, the moving magnet 4 moves in a set direction to ensure the accuracy of clamping. This structure achieves clamping at the same time, because the force between the magnets is related to the distance, when the force generated on one group of clamping assemblies changes in size, the remaining two groups of clamping assemblies will automatically cooperate and adjust, thereby automatically centering the clamped workpiece and reducing the risk of skewed installation of parts.

[0035] The clamping is realized by rotating the handle 13 to drive the rotation of the first fixed magnet 7 and the second fixed magnet 8, and then the mutual repulsion between the magnets causes the moving magnet 4 to be displaced, thereby clamping the workpiece; for different sizes of parts to be clamped, magnets with different magnetic forces are selected to control the size of the clamping force, thereby clamping parts of different sizes; when the handle 13 is rotated again, the moving magnet 4 is displaced backwards by the mutual attraction between the magnets, thereby loosening the parts. In addition, the first fixed magnet 7 and the second fixed magnet 8 are installed on the moving chuck 2, and the moving magnet 4 is installed on the static chuck 1, which can effectively reduce the damage to the parts during clamping.

[0036] After pushing the rotating handle 13, the movable chuck 2 rotates on the positioning ring 11. When the rotating handle 13 moves to the position where the first fixed magnet 7 and the movable magnet 4 are closest, since the first fixed magnet 7 and the movable magnet 4 have the same magnetic properties, according to the principle that like magnets repel each other and opposite magnets attract each other, the first fixed magnet 7 and the movable magnet 4 repel each other at this time, so that the movable magnet 4 moves in the direction away from the first fixed magnet 7, and then the three movable magnets 4 move in the direction of the center of the static chuck 1, thereby realizing the clamping operation of the clamped part; when the rotating handle 13 moves to the position where the second fixed magnet 8 and the movable magnet 4 are closest, since the second fixed magnet 8 and the movable magnet 4 have opposite magnetic properties, according to the principle that like magnets repel each other and opposite magnets attract each other, the second fixed magnet 8 and the movable magnet 4 attract each other at this time, so that the movable magnet 4 moves in the direction close to the second fixed magnet 8, and then the three movable magnets 4 move in the direction away from the center of the static chuck 1, thereby realizing the loosening operation of the clamped part. Therefore, according to the above actions, the clamping and loosening operations of the clamped part are realized.

[0037] When the clamped device is placed eccentrically, the resultant force between the first fixed magnet 7, the second fixed magnet 8 and the moving magnet 4 in one group of clamping assemblies is greater than the resultant force between the first fixed magnet 7, the second fixed magnet 8 and the moving magnet 4 in the other two groups of clamping assemblies, thereby causing uneven force on the clamped device, and then pushing the clamped device to the center position to ensure uniform force, thereby realizing automatic position adjustment of the clamping assembly to ensure that it is in the middle position and its coaxiality.

[0038] In summary, the magnetic chuck structure of the present application is simple to operate and has strong versatility. The device uses magnets to replace the traditional chuck structure, uses the mutual repulsion between magnets to achieve the clamping of parts, and uses the attraction between magnets to achieve the loosening of parts. It adopts the principle of magnetic transmission without contact, reduces friction during the clamping process, and increases the service life of the chuck. By changing the magnetic force of the magnet, different clamping forces can be met. At the same time, different types of positioning columns 5 are used to achieve the clamping of parts of different sizes and types. In addition, the device can achieve the stability of the same magnetic force, so that the clamped parts are always in the center state to prevent tilting; through the principle that the size of the magnet is only related to the spatial distance, it can ensure that the force on the clamped device in each direction is equal, ensuring the stability of the clamping; when the clamped device is placed eccentrically, the clamping assembly can automatically adjust its position after clamping to ensure that it is in the middle position, and its coaxiality can be guaranteed; the clamping process is achieved by magnetic force, and the clamping assembly can be replaced, which can ensure that the clamped device will not be deformed and damaged due to over-tight clamping. It can be seen that the device is simple to adopt, flexible to use, highly practical and has a wide range of applications.

[0039] Second embodiment:

[0040] Please refer to Figure 3 The present application provides a magnetic chuck structure, which is substantially the same as that in the first embodiment, except that the present embodiment does not use a rotating handle 13, and the outer peripheral wall of the movable chuck 2 in the present embodiment has a wavy structure.

[0041] In order to achieve stable cooperation between the various magnet groups and ensure easy operation, a limit groove 14 is opened on the circumferential side of one surface of the positioning ring 11. The length of the limit groove 14 is equal to the length of a group of magnetic components, and the limit groove 14 is located between two groups of magnetic components, and the distance between the limit groove 14 and the two groups of magnetic components is the same; a limit pin 15 that cooperates with the limit groove 14 is installed on the inner circumferential side of the movable chuck 2, and the limit pin 15 is movably and adjustably arranged in the limit groove 14.

[0042] In this embodiment, the rotation of the movable chuck 2 is achieved by moving the limit pin 15, and no longer relies on turning the handle 13. The wavy structure on the periphery of the movable chuck 2 increases its friction while ensuring its hand feel. When the movable chuck 2 rotates, the rotation angle and position of the movable chuck 2 are controlled by the length of the limit groove 14 and the limit pin 15, that is, the rotation of the movable chuck 2 is driven by moving the limit pin 15, and the limit groove 14 can limit the moving range of the limit pin 15, thereby realizing the control of the rotation angle and position of the movable chuck 2.

[0043] At the same time, this structure is suitable for occasions where the clamping force is small and the size of the clamped parts is also small.

[0044] Third embodiment:

[0045] Please refer to Figure 4 The present application provides a magnetic chuck structure, which is roughly the same as that in the second embodiment, except that: in this embodiment, the positioning column 5 is changed to a single-sided rounded corner to achieve the fitting and fixation of the clamped part with an inclined surface; the chuck cover 9 is also provided with a connecting thread, which is mainly used to connect with other components.

[0046] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. 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 chuck structure, characterized in that: It comprises a static chuck and a dynamic chuck, both of which are annular; the dynamic chuck can be rotatably mounted on the static chuck and is arranged concentrically with the static chuck; a plurality of fixing grooves extending radially are arranged at intervals on the static chuck, each of the fixing grooves is provided with a clamping assembly which can move radially along the static chuck, and one end of each group of the clamping assemblies extends into the inner cavity of the static chuck; a plurality of groups of magnetic assemblies are arranged at intervals on the dynamic chuck, and each group of the magnetic assemblies is magnetically connected to the corresponding clamping assemblies, so as to drive the plurality of groups of the clamping assemblies to move towards or away from the center of the static chuck, so as to enable the plurality of groups of the clamping assemblies to clamp or release the parts to be clamped.

2. The magnetic chuck structure according to claim 1, characterized in that: The clamping components include three groups, and the distances between two adjacent groups of the clamping components are the same.

3. The magnetic chuck structure according to claim 1, characterized in that: The clamping assembly includes a moving magnet, a positioning column and a screw; the moving magnet is movably and detachably arranged in the fixing groove; the positioning column is detachably arranged in the fixing groove, and one end is connected to the moving magnet through the screw, and the other end extends into the inner cavity of the static chuck, which is used to clamp or loosen the clamped part.

4. The magnetic chuck structure according to claim 3, characterized in that: The magnetic assembly includes a first fixed magnet and a second fixed magnet, which are spaced apart and detachably arranged on the movable chuck, and the first fixed magnet has the same magnetic properties as the movable magnet, and the second fixed magnet has an opposite magnetic property to the movable magnet.

5. The magnetic chuck structure according to claim 1, characterized in that: The magnetic components include three groups, and the distances between two adjacent groups of the magnetic components are the same.

6. The magnetic chuck structure according to claim 1, characterized in that: It also includes a chuck cover that covers the static chuck; a plurality of first connecting holes are opened at intervals on the static chuck, and a plurality of second connecting holes are opened at intervals on the chuck cover, and the first connecting holes and the second connecting holes are connected by screws; the chuck cover is also provided with connecting threads.

7. The magnetic chuck structure according to claim 1, characterized in that: The outer peripheral wall of the movable chuck is in a wave-like structure.

8. The magnetic chuck structure according to claim 1, characterized in that: The static chuck includes a base and a positioning ring that are integrally formed and coaxially arranged; the base is provided with a plurality of notches arranged at equal intervals along the circumferential direction, and the plurality of notches are located at the periphery of the dynamic chuck; the positioning ring is arranged in the middle of a surface of the base; the dynamic chuck is rotatably mounted on the positioning ring and is detachably connected to a rotating handle; the rotating handle is movably and adjustably arranged in the notch, and one end extends out of the notch.

9. The magnetic chuck structure according to claim 1, characterized in that: A limiting groove is provided on the circumferential side of one surface of the static chuck, and the length of the limiting groove is equal to the length of the magnetic component; a limiting pin matching the limiting groove is installed on the inner circumferential side of the dynamic chuck, and the limiting pin is movably and adjustably arranged in the limiting groove.

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