CN2448513Y

CN2448513Y - Permanent magnet attraction disc

Info

Publication number: CN2448513Y
Application number: CN 00249424
Authority: CN
Inventors: 陈钧台
Original assignee: Individual
Current assignee: Zhang Zhanming
Priority date: 2000-09-26
Filing date: 2000-09-26
Publication date: 2001-09-19
Anticipated expiration: 2010-09-26

Abstract

The utility model relates to a permanent magnet chuck. The traditional permanent magnetic chucks have the defect of large maneuvering force. The permanent magnet chuck comprises a panel piece composed of a panel magnetic conducting block and a panel magnetic separating block inteval device, a pole core assembly, and a moving mechanism. The pole core assembly comprises a movable pole core assembly and a fixed pole core assembly, wherein, the movable pole core assembly and the fixed pole core assembly are respectively composed of pole core blocks fixed on a pole core plate, and gaps are kept along the pole core blocks. The polarity of the magnetic pole of each pole core block forms in an upper and a lower directions, and the polarities of the adjacent pole core blocks are arranged oppositely; the movable pole core assembly and the fixed pole core assembly are lined in parallel in the width direction of the permanent magnetic chuck, and the moving mechanism controls the movable pole core assembly to move.

Description

Permanent magnetic chuck

The utility model relates to a kind of magnetic suction disc, relates in particular to a kind of permanent magnetic chuck.

Permanent magnetic chuck is the common tool of Metal Cutting Machine Tool, when Metal Cutting Machine Tool is worked, as sticking, fastening, location workpiece.The structure of existing permanent magnetic chuck as shown in Figure 1-Figure 3, wherein Fig. 3 is the vertical view of sucker shown in Figure 1, part has been done to analyse and observe among the figure.As can be seen from the figure, traditional permanent magnetic chuck is by panel 101, pole piece plate 102 with make the cam mechanism (not shown) of pole piece plate 102 with respect to panel 101 move left and right.Panel 101 is made up of every magnetic patch 101B the panel magnetic inductive block 101A and the panel that are provided with at interval; Pole piece plate 102 is made of magnetic inductive block 102A and pole piece piece 102b, and the pole polarity of pole piece piece 102B is left and right directions, and the polarity between the two neighboring pole pellet 102b is provided with on the contrary.Its operation principle is: when panel 101 and pole piece plate 102 position each other as shown in Figure 1 the time, its magnetic line of force as shown in phantom in Figure 1, the magnetic line of force sends from the pole piece piece 102B N utmost point, through panel magnetic inductive block 101A and the space that is positioned at panel 101 tops, walk around panel turns back to adjacent pole piece piece 102B again through the panel magnetic inductive block 101A of opposite side every magnetic patch 101B the S utmost point.Like this, have magnetic field to exist at panel 101 superjacent air spaces, workpiece placed on it can be by sticking, and permanent magnetic chuck is in running order.

If the pole piece plate 102 of permanent magnetic chuck moves a distance formation position as shown in Figure 2 under the manipulation of cam mechanism, the magnetic line of force of this moment is shown in the dotted line among Fig. 2, the magnetic line of force sends from the N utmost point of permanent magnetism 102B, turn back to the S utmost point of adjacent pole piece piece 102B by panel magnetic inductive block 101A, form closed magnetic circuit.At this moment, do not have magnetic field, make permanent magnetic chuck be in closed condition at panel 101 superjacent air spaces.

From top description as can be known, conversion between permanent magnetic chuck duty and the closed condition is to realize that by made pole piece plate 102 move certain distance by cam mechanism the magnetic force that the magnetic field of pole piece plate 102 holds panel 101 is the size that directly affects the cam mechanism steering force.As mentioned above, because traditional sucker needs mobile monoblock pole piece plate 102 come the conversion work state, therefore, the steering force of cam mechanism is bigger, and is in the poor short circuit state when closing.

Therefore, the purpose of this utility model is to provide and can makes pole piece plate translation power less and close preferable permanent magnetic chuck.

For achieving the above object, the permanent magnetic chuck that the utility model provides comprises: the panel assembly, pole piece assembly and the travel mechanism that are made of at interval every magnetic patch panel magnetic inductive block and panel, described pole piece assembly comprises movable pole piece assembly and fixed pole core assembly, described movable pole piece assembly and described fixed pole core assembly are made of the pole piece piece that is fixed on the pole piece plate respectively, leave the gap between each pole piece piece, the pole polarity of pole piece piece be upper and lower to, the polarity between the two neighboring pole pellet is provided with on the contrary; Described movable pole piece assembly and described fixed pole core assembly are arranged in parallel along the width of described permanent magnetic chuck, and moving of described movable pole piece assembly operated by described travel mechanism.

As mentioned above, because the pole piece composition has been divided into movable pole piece assembly and fixed pole core assembly, travel mechanism only need move movable pole piece assembly, therefore, sucker for identical suction, the pole piece assembly that need move is half of existing permanent magnetic chuck, thereby can reduce the steering force of travel mechanism greatly.

Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.

Fig. 1, Fig. 2 and Fig. 3 show the structure of traditional permanent magnetic chuck;

Fig. 4 shows the structure of permanent magnetic chuck of the present utility model;

Fig. 5 is-Fig. 8 shows each duty of permanent magnetic chuck of the present utility model, is used to explain operation principle of the present utility model;

Fig. 9 shows the another kind of structure of permanent magnetic chuck of the present utility model.

Permanent magnetic chuck of the present utility model is to improve on the basis of the traditional permanent magnetic chuck shown in Fig. 1-3.As shown in Figure 4, this permanent magnetic chuck comprises panel assembly 1, pole piece assembly 2 and travel mechanism's (not shown).Panel assembly 1 is made of every magnetic patch 1B the panel magnetic inductive block 1A and the panel that are provided with at interval.Below panel assembly 1 is pole piece assembly 2, and pole piece assembly 2 is divided into a plurality of along the width of sucker, and wherein a part is a fixed pole core assembly 21, and another part is movable pole piece assembly 22.Fixed pole core assembly 21 is provided with at intervals with movable pole piece assembly 22, and fixed pole core assembly 21 is identical with the structure of movable pole piece assembly 22, all is to be made of

pole piece piece

21A, 22A,

leaves gap

21B, 22B between each pole piece piece 21A,

22A.In gap

21B, 22B, can fill NULL (for example antifreeze plate etc.).Travel mechanism is arranged on the below of pole piece assembly 22, can manipulation activities pole piece assembly 22 moves along the length direction (being the left and right directions among Fig. 4) of sucker.Because the structure of travel mechanism can adopt travel mechanism in the conventional suction cups, therefore, does not repeat them here.

In the embodiment of Fig. 4, the quantity of fixed pole core assembly 21 and movable pole piece assembly 22 is 5, and fixed pole core assembly 21 and movable pole piece assembly 22 are spaced along the sucker width.But the quantitative requirement of pole piece assembly 2 that should be appreciated that permanent magnetic chuck of the present utility model is as follows: fixed pole core assembly 21 and movable pole piece assembly 22 all are at least one.When if the total quantity of fixed pole core assembly 21 and movable pole piece assembly 22 is odd number, the quantity of activity polar components 22 cans be compared to the quantity of fixed polarity assembly most and lacks one, and the volume that is arranged on outermost two fixed pole core assemblies is half (as shown in Figure 4) of the fixed pole core assembly in the middle of being provided with.Certainly, the quantity of movable pole piece assembly 22 also can be Duoed one than the quantity of fixed pole core assembly 21, be this quantitative relation for reducing the quantity that needs the pole piece assembly that moves, be not best, but can reach above-mentioned purpose of the present utility model equally.

Following structure chart 5-Fig. 8 explains the operation principle of permanent magnetic chuck of the present utility model.

Situation when Fig. 5 and Fig. 6 show this permanent magnetic chuck and be in the sticking state.As shown in Figure 5 (for ease of explanation, two fixed pole core assemblies and a movable pole piece assembly have only been shown among the figure, its operation principle is identical during other quantity), when movable pole piece assembly 22 is moved into position shown in Figure 5, when the polar orientation of the pole piece piece 21A in the polar orientation of the pole piece piece 22A in the movable pole piece assembly 22 and the fixed pole core assembly 21 is consistent, be fixed pole core assembly 21 when being a straight line with identical pole piece piece 21A, the 22A of movable pole piece assembly 22 Semi-polarity directions on the width of sucker, sucker is in the sticking state.The magnetic line of force trend of its

pole piece piece

21A, 22A as shown in Figure 6, the magnetic line of force is sent by the pole piece piece 21A in fixed pole core assembly 21 and the movable pole piece assembly 22, the N utmost point of 22A, magnetic inductive block 1A and the space above the panel 1 through panel assembly 1, walk around panel every magnetic patch 1B again through the panel magnetic inductive block 1A of opposite side, turn back to the S utmost point of pole piece piece 21A, 22A.For

pole piece piece

21A, 22A that the S utmost point makes progress, its magnetic line of force path is identical, and just direction is opposite.Therefore, have magnetic field to exist at the superjacent air space of panel assembly 1, workpiece placed on it can be by sticking, and permanent magnetic chuck is in the sticking state.

When movable pole piece assembly 22 being moved a certain distance by travel mechanism, the position that makes movable pole piece assembly 22 and fixed pole core assembly 21 as shown in Figure 7, be the polar orientation of the polar orientation of the pole piece piece 22A in the movable pole piece assembly 22 and the pole piece piece 21A in the fixed pole core assembly 21 when different, sucker is in closed condition.Its pole piece piece 21A, the magnetic line of force trend of 22A is shown in Fig. 8 (Fig. 8 is the cutaway view along the A-A line among Fig. 7), the magnetic line of force is sent by the N utmost point of the pole piece piece 21A (the pole piece piece 22A of perhaps movable pole piece assembly 22) of fixed pole core assembly 21, the S utmost point of the pole piece piece 22A (the perhaps pole piece piece 21A of fixed pole core assembly 21) of the panel magnetic inductive block 1A arrival activity pole piece assembly 22 of process panel assembly 1, and then send by the N utmost point of the pole piece piece 22A (the perhaps pole piece piece 21A of fixed pole core assembly 21) of movable pole piece assembly 22, arrive the S utmost point of the pole piece piece 21A (the pole piece piece 22A of perhaps movable pole piece assembly 22) of fixed pole core assembly 21, constitute closed magnetic circuit.As shown in Figure 8, because the whole process in the panel magnetic inductive block 1A of panel assembly 1 of the magnetic line of force, therefore, the space above panel assembly 1 does not have magnetic field, makes permanent magnetic chuck be in closed condition.

Describe a preferred embodiment of the present utility model and operation principle thereof above in detail.Fig. 9 shows the another kind of structure of permanent magnetic chuck of the present utility model.

Only show the pole piece assembly 2 ' structure of permanent magnetic chuck among Fig. 9.It comprises fixed pole core assembly 21 ' and movable pole piece assembly 22 ' equally, with pole piece assembly 2 differences shown in Figure 4 be, wherein the pole piece piece of half (being the identical pole piece plate of polar orientation) still is permanent magnet, as 21A ' among Fig. 9 and 22A ', and second half the pole piece piece pole piece piece of the alternate setting of permanent magnet pole pellet 22A ' (promptly with) raises up by the pole piece plate 23 ' of fixed pole pellet and forms, as 21B ' among Fig. 9 and 22B '.Because pole piece plate 23 ' is made for permeability magnetic material, therefore, the polarity that protruding 21B ' that the pole piece plate upwards forms and 22B ' show is opposite with the polarity of adjacent permanent magnet pole pellet 21A ' and 22A ', thereby played the effect identical with the structure of Fig. 4, its operation principle is identical with Fig. 4, therefore, no longer repeat at this.

Claims

1, a kind of permanent magnetic chuck comprises: the panel assembly, pole piece assembly and the travel mechanism that are made of at interval every magnetic patch panel magnetic inductive block and panel, it is characterized in that, described pole piece assembly comprises movable pole piece assembly and fixed pole core assembly, described movable pole piece assembly and described fixed pole core assembly are made of the pole piece piece that is fixed on the pole piece plate respectively, leave the gap between each pole piece piece, the pole polarity of pole piece piece be upper and lower to, the polarity between the two neighboring pole pellet is provided with on the contrary; Described movable pole piece assembly and described fixed pole core assembly are arranged in parallel along the width of described permanent magnetic chuck, and moving of described movable pole piece assembly operated by described travel mechanism.

2, permanent magnetic chuck as claimed in claim 1 is characterized in that, described pole piece assembly comprises a plurality of described movable pole piece assemblies and described fixed pole core assembly, and described movable pole piece assembly and described fixed pole core assembly are spaced.

3, permanent magnetic chuck as claimed in claim 2, it is characterized in that, described pole piece assembly comprises described movable pole piece assembly of odd number and described fixed pole core assembly, the quantity of described movable pole piece assembly is littler one than the quantity of described fixed pole core assembly, and the volume that is arranged on outermost two described fixed pole core assemblies is half of described fixed pole core assembly in the middle of being arranged on.

4, as claim 1 or 2 or 3 described permanent magnetic chucks, it is characterized in that, in the gap between the pole piece piece of described movable pole piece assembly and described fixed pole core assembly antifreeze plate is set.

5, as claim 1 or 2 or 3 described permanent magnetic chucks, it is characterized in that, described movable pole piece assembly is a permanent magnet with the identical pole piece piece of described fixed pole core assembly Semi-polarity direction, and being raised up by described pole piece plate with the pole piece piece of the alternate setting of described permanent magnet pole pellet forms.