CN219787549U

CN219787549U - Quick clamping mechanism

Info

Publication number: CN219787549U
Application number: CN202320742782.0U
Authority: CN
Inventors: 吕文礼; 蒋志金; 黄毅; 吴端仁; 吴要凤
Original assignee: Xiamen Golden Egret Special Alloy Co Ltd
Current assignee: Xiamen Golden Egret Special Alloy Co Ltd
Priority date: 2023-04-06
Filing date: 2023-04-06
Publication date: 2023-10-03
Anticipated expiration: 2033-04-06

Abstract

The utility model relates to a quick clamping mechanism which comprises a shell, a magnetic attraction mechanism, a pressing mechanism and an elastic mechanism, wherein the magnetic attraction mechanism is arranged on the shell; the shell comprises a shell and a shell cover which are fixedly connected with each other; a containing cavity is formed between the shell and the shell cover, and a first through hole is formed at the bottom of the shell and is suitable for the piece to be clamped to extend into the containing cavity; the magnetic attraction mechanism is provided with a magnetic attraction part and a driving part; the magnetic attraction part is arranged in the accommodating cavity and is internally provided with a permanent magnet; one end of the driving part is connected with the permanent magnet, and the other end of the driving part penetrates through the shell cover and drives the permanent magnet to change the magnetic pole direction; the compressing mechanism and the magnetic attraction mechanism are oppositely arranged and arranged in the accommodating cavity; the device is also suitable for moving relative to the shell along with the conversion of the magnetic pole direction of the permanent magnet towards the direction approaching or far away from the magnetic attraction mechanism so as to clamp or release the piece to be clamped together with the magnetic attraction mechanism; the elastic mechanism is abutted between the opposite surfaces of the pressing mechanism and the magnetic attraction mechanism, so that a gap suitable for the to-be-clamped piece to extend in is kept between the pressing mechanism and the magnetic attraction mechanism all the time.

Description

Quick clamping mechanism

Technical Field

The utility model relates to the technical field of assembly, in particular to a quick clamping mechanism.

Background

At present, the clamping of round bars and cutters is commonly used by pneumatic (hydraulic) chucks, three-jaw chucks and other mechanisms, compressed air (hydraulic equipment) is required to be equipped, or a screw tightening and fixing mode is used, so that the precision cannot be ensured, the steps are complicated, the clamping efficiency is very low, and the requirements of quick clamping and dismounting of round bars, cutters and the like in industrial production cannot be met.

Disclosure of Invention

Based on this, it is necessary to provide a quick clamping mechanism, comprising:

a housing comprising a shell and a cover fixedly connected to each other; a containing cavity is formed between the shell and the shell cover, and a first through hole is formed in the bottom of the shell and is suitable for the piece to be clamped to extend into the containing cavity;

a magnetic attraction mechanism having a magnetic attraction portion and a driving portion; the magnetic attraction part is arranged in the accommodating cavity and is internally provided with a permanent magnet; one end of the driving part is connected with the permanent magnet, and the other end of the driving part penetrates through the shell cover and drives the permanent magnet to change the magnetic pole direction;

the compressing mechanism is arranged opposite to the magnetic attraction mechanism and is arranged in the accommodating cavity; the device is also suitable for moving relative to the shell along with the conversion of the magnetic pole direction of the permanent magnet towards the direction approaching or separating from the magnetic attraction mechanism so as to clamp or release the piece to be clamped together with the magnetic attraction mechanism;

the elastic mechanism is abutted between the opposite surfaces of the pressing mechanism and the magnetic attraction mechanism, so that a gap suitable for the clamping piece to extend in is kept between the pressing mechanism and the magnetic attraction mechanism all the time.

In one embodiment, the material of the pressing mechanism is a metal material which can be absorbed by magnetism.

In one embodiment, a clamping groove extending axially along and penetrating the to-be-clamped piece is formed on the opposite side of the pressing mechanism and the magnetic attraction mechanism, so that the to-be-clamped piece can extend into and limit the radial displacement of the to-be-clamped piece.

In one embodiment, the cross section of the clamping groove is V-shaped.

In one embodiment, the elastic mechanism is disposed at two sides of the clamping groove in the radial direction, and the number of the elastic mechanisms is at least two.

In one embodiment, the magnetic attraction part comprises a shell body and a top cover which are fixedly connected with each other, and the permanent magnet is cylindrical; an assembly cavity which is matched with the permanent magnet in shape and is used for placing the permanent magnet is arranged in the shell; one end of the driving part is axially limited between the shell body and the top cover and is connected with the permanent magnet, and the other end of the driving part extends out of the top cover and drives the permanent magnet to rotate relative to the assembly groove.

In one embodiment, the cavity wall of the assembly cavity is provided with soft magnetic material; the shell body is made of magnetic conduction materials, and two sides of the shell body, which are opposite to and away from the pressing mechanism, are respectively provided with a notch; the notch extends in the same direction as the assembly cavity and is arranged corresponding to the permanent magnet; and non-magnetic pieces are embedded in the two notches to isolate the magnetism of the permanent magnet.

In one embodiment, the top cover is provided with a via hole for installing the driving part, and two connecting holes for installing the locking part are respectively arranged on two sides of the via hole along the distribution direction of the two notches so as to be connected with the shell, and the driving part comprises a rotating shaft; two limit structures extending along the radial direction of the rotating shaft are arranged on the peripheral surface of the rotating shaft; the limiting structure is axially limited between the shell body and the top cover and matched with the peripheral surfaces of the two locking pieces to limit the rotation range of the driving part.

In one embodiment, the top surface of the permanent magnet is provided with a plugging groove extending along the radial direction of the permanent magnet; the end face of the rotating shaft, which is connected with the permanent magnet, is provided with an inserting convex block which is matched with the inserting groove and is arranged in the inserting groove.

In one embodiment, the end of the rotating shaft extending out of the shell cover is provided with an operating member extending along the radial direction of the rotating shaft.

The clamping mechanism for the workpiece to be clamped has the following beneficial effects:

1. the permanent magnet inside the magnetic attraction mechanism is driven to change the magnetic pole direction, so that the magnetic attraction mechanism is adjusted to adjust the magnetic strength of the relative pressing mechanism through changing the magnetic pole direction, the pressing mechanism can be moved towards the magnetic attraction mechanism by the aid of strong magnetism, and the clamping piece to be clamped is pressed by strong adsorption force to prevent falling. When the magnetic attraction mechanism is changed into weak magnetic, the elastic mechanism can reset the pressing mechanism, so that the workpiece to be clamped is separated, and the effects of quick disassembly and clamping are realized.

2. By arranging the pressing mechanism to be a metal material which can be magnetically absorbed, the magnetic absorbing mechanism can absorb the pressing mechanism through magnetic attraction, so that the workpiece to be clamped is clamped.

3. Through the mode that is provided with the centre gripping recess on hold-down mechanism for wait that the holder can be spacing in the centre gripping recess, avoid producing the skew.

4. Through setting up the mode of V style of calligraphy with the centre gripping recess for this centre gripping recess can adapt to the spacing of the piece of waiting to be clamped of different radial dimensions, in order to avoid waiting to clamp the piece and take place the skew at the clamping in-process.

5. Through the mode that sets up two at least elastic mechanism in the radial both sides of centre gripping recess for the elasticity that hold-down mechanism can receive is even, and enough resets it.

6. The driving part can drive the permanent magnet to rotate relatively by arranging the assembly cavities matched with the permanent magnet in the shell body and the top cover.

7. The mode of setting up soft magnetic material through the chamber wall at the assembly chamber for by the permanent magnet can be magnetized, and then make the casing possess magnetic force, the setting of non-magnetic conduction spare is used for the isolated permanent magnet magnetic force.

8. Through set up the via hole that supplies drive division to stretch into the shell body on the top cap to set up in the mode of fastener global complex limit structure on the global of axis of rotation, make the user can whether support the fastener through limit structure and judge whether operate in place at the in-process of rotation drive division, this is favorable to promoting user experience and feels, reduces the operation degree of difficulty.

9. By arranging the inserting convex blocks and the inserting grooves at the corresponding positions of the rotating shaft and the permanent magnet respectively, a user can drive the permanent magnet to rotate relative to the assembly cavity through the driving part, so that the magnetic pole direction is changed; the arrangement is beneficial to reducing the assembly difficulty and the cost.

10. The mode that the rotating shaft extends out of one end of the shell cover is provided with the operation part extending along the radial direction of the rotating shaft is beneficial to improving the convenience of user operation.

Drawings

FIG. 1 is a block diagram of a quick clamping mechanism provided by the present utility model;

FIG. 2 is a top view of the quick clamping mechanism provided by the present utility model;

FIG. 3 is a detail view of the quick clamping mechanism provided by the present utility model;

FIG. 4 is a top view of the housing in one embodiment of the quick clamping mechanism provided by the present utility model;

FIG. 5 is a block diagram of a magnetic attraction mechanism in one embodiment of the quick clamping mechanism provided by the present utility model;

FIG. 6 is a block diagram of a driving portion of an embodiment of a quick clamping mechanism according to the present utility model;

FIG. 7 is a view showing the bottom of the top cover and the rotating shaft of one embodiment of the quick clamping mechanism provided by the present utility model.

Reference numerals:

1-a housing;

2-a compressing mechanism;

3-a magnetic attraction mechanism;

4-a driving part;

5-a piece to be clamped;

6-permanent magnets;

7-an elastic mechanism;

8-a first through hole;

9-a shell;

10-top cover;

11-a non-magnetic conductive member;

12-inserting grooves;

13-inserting convex blocks;

14-rotating shaft;

15-connecting holes;

16-an operating member;

17-via holes;

18-limiting protrusions;

19-a limiting structure;

20-clamping grooves.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1, an embodiment of the present utility model provides a quick clamping mechanism, including: the magnetic attraction mechanism 3, the pressing mechanism 2 and the elastic mechanism 7 are arranged on the shell, and the shell comprises a shell body 1 and a shell cover which are fixedly connected with each other; a containing cavity is formed between the shell 1 and the shell cover, and a first through hole 8 is formed at the bottom of the shell 1 so as to be suitable for the part 5 to be clamped to extend into the containing cavity; the magnetic attraction mechanism 3 has a magnetic attraction portion and a driving portion 4; the magnetic attraction part is arranged in the accommodating cavity and is internally provided with a permanent magnet 6; one end of the driving part 4 is connected with the permanent magnet 6, and the other end of the driving part 4 penetrates through the shell cover and drives the permanent magnet 6 to change the magnetic pole direction; the compressing mechanism 2 and the magnetic attraction mechanism 3 are oppositely arranged and arranged in the accommodating cavity; the compressing mechanism 2 is also suitable for moving relative to the shell 1 along with the conversion of the magnetic pole direction of the permanent magnet 6 towards the direction approaching or separating from the magnetic attraction mechanism 3 so as to clamp or release the piece 5 to be clamped together with the magnetic attraction mechanism 3; the elastic mechanism 7 is abutted between the opposite surfaces of the pressing mechanism 2 and the magnetic attraction mechanism 3, so that a gap suitable for the clamping piece 5 to extend into is kept between the pressing mechanism and the magnetic attraction mechanism.

In this embodiment, the quick clamping mechanism provided by the utility model is provided with the shell 1 and the shell cover, wherein the shell 1 is internally provided with the accommodating cavity, the magnetic attraction mechanism 3, the compressing mechanism 2 and the elastic mechanism 7 are all arranged in the accommodating cavity, the shell cover is arranged at the top of the shell 1, and the shell cover is fixedly connected with the shell 1, wherein the connection mode between the shell 1 and the shell cover is not limited, and can be any mode capable of being fixedly connected, in one embodiment, the shell 1 is provided with a threaded hole, the corresponding position of the shell cover is provided with a through threaded hole, and the shell 1 and the shell cover are connected through a bolt. Referring to fig. 4, a first through hole 8 is formed at the bottom of the housing 1, and the member 5 to be clamped extends into the housing 1 through the first through hole 8.

In this embodiment, as can be seen from fig. 2, the magnetic attraction mechanism 3 and the pressing mechanism 2 are disposed at two sides of the accommodating cavity, an elastic mechanism 7 is disposed between the magnetic attraction mechanism 3 and the pressing mechanism 2, and the magnetic attraction mechanism 3 and the pressing mechanism 2 cooperate to clamp the workpiece 5 to be clamped; alternatively, the choice of the member to be clamped 5 is not limited, and may be any shape of the member to be clamped 5 that can be stably clamped, such as: round bars, cutters, long clamps, etc.

In this embodiment, the magnetic attraction mechanism 3 is fixed at one side of the inner portion of the accommodating cavity, so that the magnetic attraction mechanism 3 cannot generate displacement in the inner portion of the accommodating cavity, where the magnetic attraction mechanism 3 includes a permanent magnet 6, and optionally, the permanent magnet 6 is not limited, and may be any permanent magnet 6 capable of providing a sufficient magnetic field, for example: such as natural magnetite (magnetite) and artificial magnet (alnico); in one embodiment, the permanent magnet 6 of the magnetic attraction mechanism 3 of the present utility model is a magnet.

In this embodiment, the elastic means 7 is arranged between the magnetic attraction means 3 and the pressing means 2, and the elastic means 7 is used for connecting the pressing means 2 and the magnetic attraction means 3, so that a gap suitable for the piece to be clamped to extend into is always kept between the two. Alternatively, the choice of the elastic means 7 is not limited, and may be any elastic material capable of satisfying a required elastic variable, such as: springs, pressure spring tubes, bellows, etc.

In this embodiment, the pressing mechanism 2 is disposed inside the accommodating cavity, the pressing mechanism 2 can perform displacement inside the accommodating cavity, and when the pressing mechanism 2 receives the magnetic attraction force of the magnetic attraction mechanism 3 and the magnetic attraction force is greater than the elastic force provided by the elastic mechanism 7, the pressing mechanism 2 is displaced towards the direction approaching the magnetic attraction mechanism 3, so that the distance between the pressing mechanism 2 and the magnetic attraction mechanism 3 is reduced, and the to-be-clamped piece 5 is clamped; when the magnetic attraction force of the magnetic attraction mechanism 3 is weakened and smaller than the elastic force provided by the elastic mechanism 7, the pressing mechanism 2 is displaced in the direction away from the magnetic attraction mechanism 3, the distance between the pressing mechanism 2 and the magnetic attraction mechanism 3 is enlarged, and the clamping of the piece 5 to be clamped is further released.

In this embodiment, the driving part 4 is rotated to change the magnetic field of the permanent magnet 6 in the magnetic attraction mechanism 3, so as to adjust the magnetic strength of the magnetic attraction mechanism 3, the strong magnetism can make the pressing mechanism 2 move towards the direction of the magnetic attraction mechanism 3, and the strong adsorption force makes the clamping mechanism press the piece 5 to be clamped to prevent the piece from falling off. When the magnetic attraction mechanism 3 is in indexing weak magnetism, the elastic mechanism 7 can reset the pressing mechanism 2, so that the workpiece 5 to be clamped is separated, and the effects of quick disassembly and clamping are achieved.

In one embodiment, the material of the pressing mechanism 2 is a magnetically attractable metal material. In this embodiment, the pressing mechanism 2 is a metal material that can be magnetically absorbed, so the pressing mechanism 2 can receive the magnetic force of the magnetic attraction mechanism 3, and the magnetic attraction force of the magnetic attraction mechanism 3 to the pressing mechanism 2 is changed along with the change of the magnetic force, wherein when the magnetic force is larger than the elastic force of the elastic mechanism 7, the pressing mechanism 2 moves towards the magnetic attraction mechanism 3, and the distance between the pressing mechanism 2 and the magnetic attraction mechanism 3 is reduced; when the magnetic force is smaller than the elastic force of the elastic mechanism 7, the pressing mechanism 2 moves back to the magnetic attraction mechanism 3, and the distance between the pressing mechanism 2 and the magnetic attraction mechanism 3 becomes large. Alternatively, the material of the pressing mechanism 2 is not particularly limited, and may be any magnetically absorptive metal material, such as: cast iron, nickel, cobalt, and the like.

In one of the embodiments, the opposite side of the pressing mechanism 2 from the magnetic attraction mechanism 3 is provided with a clamping groove 20 extending axially along and penetrating the member to be clamped 5 for the member to be clamped 5 to extend into and limit its displacement in the radial direction.

In this embodiment, the pressing mechanism 2 is provided with the holding groove 20, and the shape of the holding groove 20 is not limited, and may be any shape capable of stably holding the member 5 to be held, such as: conical, circular, prismatic, etc.; the clamping groove 20 is used for clamping the piece 5 to be clamped, so that the piece 5 to be clamped cannot move in parallel between the pressing mechanism 2 and the magnetic attraction mechanism 3; the clamping groove 20 penetrates through one side of the whole pressing mechanism 2 along the axial direction of the piece 5 to be clamped, so that the clamping groove 20 can accommodate the piece 5 to be clamped with a length long enough.

In one embodiment, the clamping groove 20 is V-shaped in cross section. In an embodiment, the cross section of the clamping groove 20 is selected to be V-shaped, and the V-shaped clamping groove 20 is adopted to better clamp the round rod type workpiece 5 to be clamped, so that the diameter range of the workpiece 5 to be clamped is larger, and the clamping device has the advantage of uniform stress, and damage to the workpiece 5 to be clamped due to uneven stress in the clamping process is avoided.

In one embodiment, the elastic means 7 are arranged on both sides 20 in the radial direction of the clamping groove, and the number of elastic means 7 is at least two. In this embodiment, the number of the elastic means 7 is not particularly limited, but may be any number that can be equally distributed on both sides of the holding groove 20, for example: 2, 4, 6, etc.; wherein, the elastic mechanism 7 sets up clamping groove 20 both sides for the elasticity of elastic mechanism 7 can more evenly distribute on hold-down mechanism 2, and keeps clamping groove 20 both sides, and the elasticity that hold-down mechanism 2 received equals, and then guarantees that the relative face between hold-down mechanism 2 and the magnetic attraction mechanism 3 keeps the parallelism constantly, thereby makes in the centre gripping or dismantles waiting that the holder 5 in-process, waits that holder 5 atress is even.

In one embodiment, the magnetic attraction part comprises a shell body 9 and a top cover 10 which are fixedly connected with each other, and the permanent magnet 6 is cylindrical; an assembly cavity which is matched with the shape of the permanent magnet 6 and used for placing the permanent magnet 6 is arranged in the shell body 9; one end of the driving part 4 is axially limited between the shell body 9 and the top cover 10 and is connected with the permanent magnet 6, and the other end of the driving part 4 extends out of the top cover 10 and drives the permanent magnet 6 to rotate relative to the assembly cavity.

In this embodiment, as can be seen from fig. 3, the magnetic attraction part includes a housing body 9 and a top cover 10, wherein the housing body 9 and the top cover 10 are fixedly connected, an assembly cavity is arranged in the housing body 9, the shape and the size of the assembly cavity are equal to those of the permanent magnet 6, and the permanent magnet 6 is assembled in the assembly cavity and can freely rotate in the assembly cavity; in addition, one end of the driving part 4 stretches into the top cover 10, and the driving part 4 is limited by the top cover 10 in the axial direction, wherein one end of the driving part 4 stretching into the top cover 10 is connected with the permanent magnet 6, the driving part 4 is connected with the permanent magnet 6, and the driving part 4 can drive the permanent magnet 6 to rotate relative to the assembly cavity.

In one of the embodiments, the cavity wall of the assembly cavity is provided with a soft magnetic material; the shell body 9 is made of magnetic conduction materials, and two opposite sides of the shell body 9, which are opposite to and away from the pressing mechanism 2, are respectively provided with a notch; the notch and the assembly cavity extend in the same direction and are arranged corresponding to the permanent magnet 6; the non-magnetic conductive pieces 11 are embedded in the two gaps to isolate the magnetism of the permanent magnet 6.

In this embodiment, the cavity wall of the assembly cavity adopts soft magnetic material, the shell body 9 part wrapped outside the soft magnetic material adopts magnetic conductive material, wherein the soft magnetic material is a ferrite material which is easy to magnetize and demagnetize under a weaker magnetic field, the soft magnetic material is in contact with the permanent magnet 6, the influence of the magnetic field of the permanent magnet 6 is received, and then magnetization or demagnetization is correspondingly generated, the magnetic conductive material can conduct out the magnetic field magnetized by the soft magnetic material, and magnetic attraction is generated for the compressing mechanism 2, and optionally, the material selection of the shell body 9 is not limited, and can be any magnetic conductive material, such as: cast iron, nickel, cobalt, and the like.

In this embodiment, the two sides of the housing 9 opposite to and facing away from the pressing mechanism 2 are provided with notches, and non-magnetic members 11 having the same shape and size as the notches are disposed in the notches, and optionally, the material of the non-magnetic members 11 is not specifically limited, and may be any non-magnetic material, for example: brass, wood, plastic, etc.; the non-magnetic conductive piece 11 is arranged in the direction opposite to and away from the compressing mechanism 2, so that the non-magnetic conductive piece 11 can isolate the magnetic field of the permanent magnet 6, and further the influence of the permanent magnet 6 on the compressing mechanism 2 is avoided.

In one embodiment, the top cover 10 is provided with a through hole 17 for installing the driving part 4, and two connecting holes for installing the locking piece are respectively arranged at two sides of the through hole along the distribution direction of the two gaps so as to be connected with the shell; the driving section 4 includes a rotation shaft 14; two limit structures 19 extending along the radial direction of the rotating shaft 14 are arranged on the peripheral surface of the rotating shaft 14; the limiting structure 19 is axially limited between the housing body 9 and the top cover 10, and cooperates with the limiting protrusion 18 to limit the rotation range of the driving part 4.

In this embodiment, the top cover 10 is provided with the via hole 17, the driving part 4 extends into the shell 9 through the via hole 17, the driving part 4 includes the rotation shaft 14, the bottom of the rotation shaft 14 is provided with the limit structure 19, wherein, referring to fig. 7, the bottom of the top cover 10 is provided with a rotation groove for the rotation of the limit structure 19 around the via hole 17, meanwhile, two limit protrusions 18 are provided in the transmission groove, the limit protrusions 18 are matched with the limit structure 19, so that the rotation range of the rotation shaft 14 is limited, specifically, the rotation range of the rotation shaft 14 is 0 ° -90 °.

In one of the embodiments, the top surface of the permanent magnet 6 is provided with a plugging groove 12 extending radially along the permanent magnet 6; the end surface of the rotating shaft 14 connected with the permanent magnet 6 is provided with a plug-in protruding block 13 matched with the plug-in groove 12 and is arranged in the plug-in groove 12.

In this embodiment, the top surface of the permanent magnet 6 is provided with the inserting groove 12, the rotating shaft 14 of the driving part 4 is provided with the inserting protruding block 13, and the inserting protruding block 13 on the driving part 4 is clamped in the inserting groove 12 of the permanent magnet 6, so that the permanent magnet 6 is fixedly connected with the driving part 4, and the driving part 4 can drive the permanent magnet 6 to rotate together in the rotating process, so that the magnetic field direction generated by the permanent magnet 6 can be changed.

In one of the embodiments, the end of the rotation shaft 14 extending beyond the cover is provided with an operating member 16 extending radially along the rotation shaft 14. In this embodiment, referring to fig. 6, the end of the rotation shaft 14 of the driving part 4 extending out of the cover is provided with a connection hole 15, an operation member 16 is provided in the connection hole 15, and the operation member 16 is provided so that the rotation shaft 14 can be rotated more conveniently.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. A quick clamping mechanism comprising:

2. The quick clamping mechanism of claim 1 wherein said hold down mechanism is formed from a magnetically attractable metallic material.

3. A quick clamping mechanism according to claim 1, wherein the side of the hold-down mechanism opposite the magnetic attraction mechanism is provided with a clamping groove extending axially through the member to be clamped for the member to be clamped to extend into and limit its displacement in a radial direction.

4. A quick clamping mechanism according to claim 3 wherein the clamping groove is V-shaped in cross section.

5. A quick clamping mechanism according to claim 3, wherein the resilient means are provided on both sides in the radial direction of the clamping groove, and the number thereof is at least two.

6. The quick clamping mechanism according to claim 1, wherein the magnetic attraction portion comprises a housing body and a top cover fixedly connected with each other, and the permanent magnet is cylindrical; an assembly cavity which is matched with the permanent magnet in shape and is used for placing the permanent magnet is arranged in the shell; one end of the driving part is axially limited between the shell body and the top cover and is connected with the permanent magnet, and the other end of the driving part extends out of the top cover and drives the permanent magnet to rotate relative to the assembly cavity.

7. The quick clamping mechanism as recited in claim 6 wherein the walls of the mounting cavity are provided with soft magnetic material; the shell body is made of magnetic conduction materials, and two sides of the shell body, which are opposite to and away from the pressing mechanism, are respectively provided with a notch; the notch extends in the same direction as the assembly cavity and is arranged corresponding to the permanent magnet; and non-magnetic pieces are embedded in the two notches to isolate the magnetism of the permanent magnet.

8. The quick clamping mechanism according to claim 7, wherein the top cover is provided with a through hole for mounting the driving part, and two connecting holes for mounting the locking member are respectively arranged on two sides of the through hole along the direction of the distribution of the two notches so as to be connected with the shell; the driving part comprises a rotating shaft; two limit structures extending along the radial direction of the rotating shaft are arranged on the peripheral surface of the rotating shaft; the limiting structure is axially limited between the shell body and the top cover and matched with the peripheral surfaces of the two locking pieces to limit the rotation range of the driving part.

9. The quick clamping mechanism according to claim 8, wherein the top surface of the permanent magnet is provided with a mating groove extending radially therealong; the end face of the rotating shaft, which is connected with the permanent magnet, is provided with an inserting convex block which is matched with the inserting groove and is arranged in the inserting groove.

10. A quick clamping mechanism according to claim 9, wherein the end of the rotatable shaft extending beyond the housing cover is provided with an operating member extending radially thereof.