CN1139185A

CN1139185A - Electromagnetic clutch

Info

Publication number: CN1139185A
Application number: CN 96104804
Authority: CN
Inventors: 西村兴三
Original assignee: Mita Industrial Co Ltd
Current assignee: Kyocera Mita Industrial Co Ltd
Priority date: 1995-04-25
Filing date: 1996-04-25
Publication date: 1997-01-01

Abstract

An electromagnetic clutch includes a field member having a hollow in a center thereof and carrying a field coil in the form of a ring, a shaft rotatably placed in the hollow of the field member, a rotor member fixedly attached on the shaft, the rotor member being arranged on one side of the field member, a driving member rotatably mounted on the shaft, the driving member being arranged on one side of the rotor member, and an armature member attached to the driving member, the armature member being arranged between the rotor member and the driving member and bendable toward the rotor member. The shaft is provided with an inner cylinder member made of a synthetic resin and formed with a hollow extending along an axis thereof, the hollow being operable to engage with a torque transmission shaft of a device to be connected with the electromagnetic clutch and having an irregular shape portion for keeping the torque transmission shaft to rotate together with the inner cylinder member, and an outer cylinder member placed over the inner cylinder member, the outer cylinder member being made of a metallic material having magnetism.

Description

Magnetic clutch

The present invention relates to magnetic clutch.

Usually, the structure of magnetic clutch as shown in figure 20.In Figure 20, part shown in 100 represents that one is used for the magnetic clutch of the copy paper feeding means of machines such as duplicating machine.Magnetic clutch 100 has magnetizer 102, and this magnetizer is by forming along these magnetizer 102 axial cylindrical cavities.Rotatable hollow shaft 103 inserts in this cavity 101.Have bobbin 104 in the magnetizer 102.Be wound with field coil 105 on the bobbin 104.

Rotor 107 firmly is fixed in hollow shaft 103.Rotor 107 contains the through hole of some.Drive unit 109 with tooth is rotatably installed on the hollow shaft 103.In addition, armature device 108 is connected in drive unit 109 by disc spring 110.Armature device 108 can be rotated with respect to hollow shaft 103.

The two ends of hollow shaft 103 have groove 111 and 112.Retaining ring device 113,114 is coupled among the groove 111,112, with fixedly magnetizer 102, rotor 107 and drive unit 109, makes it to avoid slippage from the hollow shaft 103.In the parts that constitute magnetic clutch, magnetizer 102, hollow shaft 103, rotor 107 and armature device 108 are to be made by magnetic material (as ferrous material) at least.

The magnetic clutch 100 of said structure, its working principle is as follows.Rotate around hollow shaft 103 under the drive source drives that drive unit 109 does not mark in the drawings.Particularly, when electric current flowing through coil 105, the magnetic line of force generates along magnetizer 102, hollow shaft 103 and rotor 107.Armature device 108 overcomes the bias force of disc spring 110 and is adsorbed on the rotor 107 under the effect of the Magnetic leakage flux of passing rotor through hole 106.Therefore, rotor 107 is with drive unit 109 rotations, and because rotor 107 firmly is fixed in hollow shaft 103, then this hollow shaft 103 is also with rotor 107 one rotation.

On the contrary, when stopping the electric current supply, the energy in the coil 105 is removed, thereby the magnetic line of force disappears.Therefore, the magnetic pull of rotor 107 also disappears.As a result, armature device 108 recovers its original state, and under this state, this armature device 108 is shifted to drive unit 109 and broken away from rotor 107 under the effect of disc spring 110 bias forces.Like this, although drive unit 109 is rotating, hollow shaft 103 no longer rotates.

Hollow shaft 103 has along the axial cavity of this hollow shaft 103.As shown in figure 21, the cavity that is formed at hollow shaft 103 has D shape hollow section in the end that magnetizer 102 is provided.In this cavity of hollow shaft 103, inserted the axostylus axostyle that constitutes the copy paper feeding means.One end of this axostylus axostyle has the D tee section, with the D shape hollow section corresponding to hollow shaft 103.Under such configuration, the rotating force of the hollow shaft 103 of clutch 100 just is sent on the axostylus axostyle of copy paper feeding means.The engagement of D tee section has guaranteed the joint rotation of hollow shaft 103 with copy paper feeding means axostylus axostyle.

Owing to there is D shape hollow section, it is difficult utilizing the machining metal bar and making hollow shaft 103 always.Therefore, the production of hollow shaft 103 in the past is to utilize in the mould that has with this hollow shaft 103 consistent spaces to fill the powder that contains magnetic-particle and at high temperature carry out sintering, and then this sintering axostylus axostyle is carried out machining to form groove 111,112 at its two ends.

Yet the method for this production hollow shaft requires multiple working procedure, for example molding and sintering.In addition, because the nonuniformity of powder density in the moulding process, this hollow shaft can be out of shape inevitably in sintering process.Therefore, must grind to obtain required given shape this sintering axostylus axostyle in the past.The cost of production of hollow shaft was very high like this, in the past.This has increased the integral production cost of magnetic clutch inevitably.

In the magnetic clutch 100 of routine, the structure of rotor 107 is shown in Figure 22 and 23.Figure 22 is the front elevation of rotor 107, and Figure 23 is the side cross-sectional, view of rotor 107.

Rotor 107 heart therein has through hole 1071, has circular depressed 1072 in the one side, and has annular groove 1073 in the same side.Annular groove 1073 has the bigger degree of depth than circular depressed 1072.Have through

hole

1074,1075 and 1076 on the end wall of annular groove 1073, wherein each through hole is arc.

In other words, rotor 107 encircles projection 1077 and outer shroud projection 1078 in the one side coaxially has.The formation of interior ring and

outer shroud projection

1077 and 1078 is concyclic hearts.A side that forms this

projection

1077 and 1078 on the rotor 107 is towards armature device 108, and the opposite side of this rotor 107 is towards magnetizer 102.Under this structure, when coil 105 was subjected to encouraging, under the effect of passing rotor through hole 106 Magnetic leakage fluxs, armature device 108 attracted on the rotor 107.

Because rotor 107 has circular depressed 1072, annular groove 1073 and through hole 1074 to 1076, so its structure is very complicated.This just makes and is difficult to once make rotor 107 by pressing mold.Therefore, utilized machining to make this rotor in the past.Yet the machining of rotor needs for a long time, and this just is difficult to produce a large amount of rotors at short notice, thereby reduces the cost of production of this rotor.This has increased the integral production cost of magnetic clutch inevitably.

In addition, for magnetic clutch, all require when the excitation of field coil disappears, hollow shaft is wanted stop motion and is remained on certain fixing position.For example, be used at magnetic clutch under the situation of copy paper feeding means, the fault that the error of stop position can cause copy paper to be presented is such as present copy paper on advance position.Have again, stable if stop position does not keep, just might make next roller bearing to (such as the location roller bearing that carries out the secondary feeder operation to) not firm to the interlock of copy paper.

For addressing this problem, can provide braking device for magnetic clutch.But, be equipped with braking device and caused the more complicated of structure and production process, thereby make the cost of production that is difficult to reduce magnetic clutch.

One of purpose of the present invention provides and overcomes the magnetic clutch that is present in the problems referred to above in the prior art.

Another object of the present invention provides the method that a kind of manufacturing is used for the rotor of magnetic clutch, and this method has overcome and is present in the problems of the prior art.

A further object of the present invention provides a kind of magnetic clutch, and it makes and might be easy to processing more and reduce cost of production.

The present invention relates to magnetic clutch, it comprises: magnetizer, and its center has cavity, and is wound with annular field coil; Rotatably be placed in the axostylus axostyle in the magnetizer cavity, this axostylus axostyle comprises by synthetic resin to be made and axially has the interior cylindrical device of cavity along it, this cavity is meshed with the torque transmission shaft of the device that is connected in magnetic clutch in operation process and part with asymmetrical shape is rotated to guarantee this torque transmission shaft and interior cylindrical device, this axostylus axostyle also comprises the exterior cylindrical device that is placed on the interior cylindrical device, and this exterior cylindrical device is made by the metallic material with magnetic; Be fixedly connected on the rotor arrangement of above-mentioned axostylus axostyle exterior cylindrical device, this rotor arrangement is set at a side of magnetizer; Be rotatably installed in the drive unit on the above-mentioned exterior cylindrical device, this drive unit is set at a side of rotor arrangement; And the armature device that is connected in this drive unit, this armature device is positioned between rotor arrangement and the drive unit and to the rotor arrangement bending.

With regard to this magnetic clutch, its axostylus axostyle is made of interior cylindrical device and exterior cylindrical device.Interior cylindrical device with asymmetrical shape part is made by synthetic resin.The exterior cylindrical device is made by metallic material.Therefore, do not need to carry out sintering or machining, this makes the manufacturing of magnetic clutch axostylus axostyle and the manufacturing of magnetic clutch itself become easy.Thereby, can reduce the cost of production of magnetic clutch.

The interior cylindrical device can form projection at certain special position of its outer surface.The exterior cylindrical device can form hole on its peripheral wall, this hole can be meshed with above-mentioned projection in the time of on placing the interior cylindrical device.

Can estimate that the interior cylindrical device should be longer than the exterior cylindrical device, in the time of on the exterior cylindrical device places the interior cylindrical device, this interior cylindrical device comprises the expose portion that stretches out this exterior cylindrical device terminal edge and have groove, and disposes securing means in this groove.

In addition, magnetic clutch involved in the present invention comprises: its center has cavity and is wound with the magnetizer of annular field coil; Rotatably place the axostylus axostyle in the magnetizer cavity; Be fixedly connected on the rotor arrangement on the axostylus axostyle, this rotor arrangement is set at a side of magnetizer, and this rotor arrangement comprises device and the outer device of annular in the annular, and this outer device size is bigger than interior device size; Be rotatably installed in the drive unit on the axostylus axostyle, this drive unit is set at a side of rotor arrangement; And the armature device that is connected in drive unit, this armature device is set between this rotor arrangement and the drive unit and to this rotor arrangement bending.

For this magnetic clutch, rotor arrangement is made of greater than the outer device that installs in this interior device and size.They can be shaped separately.Therefore, the production of this rotor can reduce cost.This will make the production of magnetic clutch easier, thereby reduce cost of production.

Should can be formed centrally through hole therein by interior device, and form first annular protrusion in outer perimeter, and form second annular protrusion at circumference along its opposite side surface through hole along the one side surface.Should can form annular wall along its outer perimeter by outer device, and be formed centrally through hole therein, the through hole of this outer device is meshed with second annular protrusion of interior device, and forms hole between through hole and annular wall.In addition, can utilize second annular protrusion of internal device to be out of shape and interior device and outer device are linked together securely.

In addition, magnetic clutch involved in the present invention comprises: its center has cavity and is wound with the magnetizer of ring-type field coil; Rotatably place the axostylus axostyle of this magnetizer cavity; Firmly be connected in the rotor arrangement on this axostylus axostyle, this rotor arrangement is set at a side of magnetizer; Be rotatably mounted in the drive unit on this axostylus axostyle, this drive unit is set at a side of this rotor arrangement; Be connected to the armature device of this drive unit, this armature device is set between rotor arrangement and the drive unit and to this rotor arrangement bending; And braking device, it is firmly fixed on the magnetizer and comes in contact with this rotor arrangement in operation process.

For this magnetic clutch, it has been equipped with on-stream and the contacted braking device of rotor arrangement.The rotation of rotor can the control reliably with simple structure.

This braking device can be by in order to the department of assembly that is installed on magnetizer and on-stream and contacting part that rotor arrangement comes in contact and constitute.In addition, magnetizer can also be equipped with an advancing means, in order to push this braking device to rotor arrangement in operation process.

The present invention relates to be used for the axostylus axostyle of magnetic clutch, it comprises: made and axially had the interior cylindrical device of cavity along it by synthetic resin, this cavity can be meshed and have the asymmetrical shape part in order to guarantee that this torque transmission shaft and interior cylindrical device rotate with the torque transmission shaft of the device that is connected to magnetic clutch in operation process; And placing exterior cylindrical device on the interior cylindrical device, this exterior cylindrical device is made by the metallic material with magnetic.

This axostylus axostyle is made of interior cylindrical device and exterior cylindrical device.They can independently be shaped, and this has guaranteed the simplicity of manufacturing.Therefore, the cost of production of magnetic clutch axostylus axostyle can reduce significantly.

This interior cylindrical device can form projection at certain special position of its outer surface.This exterior cylindrical device can form hole on its peripheral wall, this hole is meshed with this projection on the exterior cylindrical device places the interior cylindrical device time.

This interior cylindrical device can be longer than this exterior cylindrical device, thereby this interior cylindrical device has the expose portion that stretches out this exterior cylindrical device terminal edge when the exterior cylindrical device is placed on it.This expose portion has groove, and securing means is placed among this groove.

In addition, the present invention relates to be used for the rotor of magnetic clutch, it comprises: the outer device of device and annular in the annular, and this outer device size is greater than interior device size; Should in install therein that the heart has through hole, have first annular protrusion along one side surface outer perimeter, and having second annular protrusion at circumference along its opposite side surface through hole; Should have annular wall along its outer perimeter by outer device, and the heart has through hole therein, and the through hole that is somebody's turn to do outer device is in engagement with second annular protrusion that is somebody's turn to do interior device, the device space that annular wall limited outside device places under this state, and should between annular wall and through hole, have hole by outer device.

This rotor is made of interior device and outer device.Therefore, they can independently separately be shaped, and this makes that the rotor of magnetic clutch is easier to generate.Like this, can reduce the cost of production of magnetic clutch significantly.

Should can be out of shape by second annular protrusion of internal device and combine securely mutually with outer device by interior device.

In addition, the present invention relates to make the method for the rotor that is used for magnetic clutch, it may further comprise the steps: make device in the annular, the center of this device has center hole, hole one side surface outer perimeter has first annular protrusion, and has second annular protrusion along the circumference of its opposite side surface through hole; Make the outer device of annular, this device has annular wall along its outer perimeter, and its center has center hole, and has hole between center hole and annular wall, this center hole is meshed with second annular protrusion of interior device, and this outer device size is greater than interior device size; At last should in device interconnect with outer device, its mode is, interior device placed the outer device space that annular wall limited and second annular protrusion of interior device is placed among the outer center hole that installs.

Simultaneously, the present invention relates to be used for the method for manufacturing of the rotor of magnetic clutch, it may further comprise the steps: make device in the annular, the center of this device has center hole, have first annular protrusion along one side surface outer perimeter, and have second annular protrusion along the circumference of its opposite side centre of surface hole; Make the outer device of annular, this device has annular wall along its outer perimeter, and the heart has center hole therein, and this center hole can be meshed with second annular protrusion of interior device, and this outer device size is greater than interior device size; Should in device interconnect with outer device, its mode is, interior device placed among the outer device space that annular wall limited and second annular protrusion of interior device is placed among the outer center hole that installs; Last certain position of installing outside between annular wall and the center hole forms hole.

Have again, the present invention relates to be used for the method for manufacturing of the rotor of magnetic clutch, it may further comprise the steps: the tabular disk that the center is had center hole is processed into interior device, this device has first annular protrusion along one side surface outer perimeter, and has second annular protrusion along the circumference of its opposite side centre of surface hole; With sheet material forming is the discoid elementary outer device with annular wall, be formed centrally center hole in outside this is elementary, installing, this center hole can be meshed with second annular protrusion of interior device, thereby makes outer device, and this outer device size is greater than interior device size; Should in device interconnect with outer device, its mode is, interior device placed the outer device space that annular wall limited and second annular protrusion of interior device is placed among the outer center hole that installs; Last certain position of installing outside between annular wall and the center hole forms hole.

In addition, the present invention relates to be used for the method for manufacturing of the rotor of magnetic clutch, it may further comprise the steps: tabular disk is configured as elementary interior device, this device has first annular protrusion and has central protuberance at its opposite side centre of surface along one side surface outer perimeter, in this is elementary, form center hole on the central protuberance of device again, thereby make interior device; With sheet material forming is the discoid elementary outer device with annular wall, be formed centrally center hole in outside this is elementary, installing again, this center hole can be meshed with the central protuberance of interior device, thereby makes outer device, and this outer device size is greater than interior device size; Should in device interconnect with outer device, its mode is, interior device is placed the outer device space that annular wall limited, and the central protuberance of interior device is placed among the outer center hole that installs; Last certain position of installing outside between annular wall and the center hole forms hole.

Have again, the present invention relates to be used for the method for manufacturing of the rotor of magnetic clutch, it may further comprise the steps: the tabular disk that the center is had center hole is configured as interior device, and this device has first annular protrusion and has second annular protrusion on its opposite side surface along the center hole circumference along the outer perimeter of one side surface; With sheet material forming is the discoid elementary outer device with annular wall, be formed centrally center hole in outside this is elementary, installing again, this center hole can be meshed with second annular protrusion of interior device, thereby makes outer device, and this outer device size is greater than interior device size; Should in device interconnect with outer device, its mode is, interior device placed among the outer device space that annular wall limited, and the central protuberance of interior device is placed among the outer center hole that installs; Last certain position of installing outside between annular wall and the center hole forms hole.

Also have, the present invention relates to be used for the method for manufacturing of the rotor of magnetic clutch, it may further comprise the steps: be formed centrally center hole in tabular disk; Should be configured as interior device by tabular disk, this device has first annular protrusion at the circumference along the one side surface, and has second annular protrusion on its opposite side surface along the circumference of center hole; With sheet material forming is the discoid elementary outer device with annular wall, be formed centrally center hole in outside this is elementary, installing again, this center hole can be meshed with second annular protrusion of interior device, thereby makes outer device, and this outer device size is greater than interior device size; Should in device interconnect with outer device, its mode is, interior device is placed the outer device space that annular wall limited, and the central protuberance of interior device is placed among the outer center hole that installs; The annular wall of last device outside and certain position between the center hole form hole.

Form coating on the exposed surface that can in whole, install and install outward.

In addition, the present invention relates to be used for the method for manufacturing of the rotor of magnetic clutch, it may further comprise the steps: be formed centrally center hole in tabular disk; Should be configured as interior device by tabular disk, this device has first annular protrusion along the outer perimeter of one side surface, and has second annular protrusion on its opposite side surface along the circumference of center hole; In whole the device exposed surface on coated with coating; The sheet material forming that will have coating is the discoid elementary outer device with annular wall, be formed centrally center hole in outside this is elementary, installing again, this center hole can be meshed with second annular protrusion of interior device, thereby makes outer device, and this outer device size is greater than interior device size; Should in device interconnect with outer device, its mode is, interior device is placed the outer device space that annular wall limited, and the central protuberance of interior device is placed among the outer center hole that installs; The annular wall of last device outside and certain position between the center hole form hole.

Should in device can be out of shape and link together securely mutually by internal device second annular protrusion with outer device.

In the middle of these method for manufacturing, the interior device of rotor and outer device are independent separately processing.Like this, can simplify the production process of rotor, and this has just reduced the cost of production of rotor.In addition, the hole on the outer device can form easily.Have again, can realize the internally plating of device easily.

By following narration and accompanying drawing, above-mentioned and other purpose, characteristic and advantage of the present invention will become more clear.

Fig. 1 is the cross-sectional view of the magnetic clutch of first scheme according to the present invention;

Fig. 2 is the cross-sectional view that is included in the axostylus axostyle among first magnetic clutch shown in Figure 1;

Fig. 3 is the side view of axostylus axostyle outward appearance shown in Figure 2;

Fig. 4 is the outward appearance side view of the outer space stem of this axostylus axostyle of formation;

Fig. 5 is the outward appearance side view of axostylus axostyle improved form;

Fig. 6 is the cross-sectional view of the magnetic clutch of alternative plan according to the present invention;

Fig. 7 is the front elevation that is contained in the rotor among this alternative plan magnetic clutch;

Fig. 8 is the cross-sectional view of rotor shown in Figure 7;

Fig. 9 is the elementary interior device cross-sectional view of the interior device of pie graph 7 and rotor shown in Figure 8;

Figure 10 is the cross-sectional view with elementary interior device of through hole;

Figure 11 is the cross-sectional view of installing in the rotor that utilizes pressing mold to make;

The elementary interior cross-sectional view of installing of Figure 12 for producing with another kind of method;

Figure 13 is the cross-sectional view of the tabular disk of pie graph 7 and rotor shown in Figure 8 China and foreign countries device;

Figure 14 is an elementary outer cross-sectional view of installing of utilizing pressing mold to make;

Figure 15 has the cross-sectional view of the elementary outer device of through hole for the center;

Figure 16 for device in describing with elementary outside the combine cross-sectional view of situation of device;

Figure 17 is the cross-sectional view of rotor, and its China and foreign countries' device has hole;

Figure 18 is the cross-sectional view of the magnetic clutch of third party's case according to the present invention;

Figure 19 is the perspective view that is contained in the braking device among third party's case magnetic clutch of the present invention;

Figure 20 is the cross-sectional view of conventional magnetic clutch in the prior art;

Figure 21 is the cross-sectional view that is contained in the axostylus axostyle in the conventional magnetic clutch shown in Figure 20;

Figure 22 is the front elevation that is contained in the rotor in the conventional magnetic clutch shown in Figure 20;

Figure 23 is the cross-sectional view of rotor shown in Figure 22.

Fig. 1 is the longitudinal section sectional view of the magnetic clutch of first scheme according to the present invention.In Fig. 1,10 expression magnetic clutchs.This clutch 10 has the magnetizer 12 that comprises hollow parts 11.This magnetizer comprises shell 12a and the field coil 16 that is around on the bobbin 14, and this bobbin places shell 12a.This hollow parts 11 has along magnetizer 12 axially extended cylindricalitys.Hollow shaft 13 rotatably places among the hollow parts 11.Bobbin 14 is made by insulating material.The outer perimeter of field coil 16 covers with leaf insulator material 15.Coil 16 is encouraged and produce the magnetic line of force.

Rotor 17 firmly is fixed on the axostylus axostyle 13.Simultaneously, armature device 18 is rotatably installed on the axostylus axostyle 13.Rotor 17 has hole 19 in its marginal end portion.Toothed drive unit 20 is rotatably installed on the axostylus axostyle 13.Armature device 18 interconnects with drive unit 20.This armature device 18 is offset to drive unit 20 under the effect of disc spring 21.

Axostylus axostyle 13 has

groove

134 and 135 at its two ends, is furnished with

brake hoop

24 and 25 in this groove, in order to fixedly magnetizer 12, rotor 17, armature device 18 and drive unit 20 in case its slippage from this axostylus axostyle 13.

Support

26,27 is provided in the two ends of hollow parts 11.

In the parts that constitute this magnetic clutch, magnetizer 12, rotor 17 and armature device 18 are to be made by the material with magnetic (as ferrous material) at least.Shown in Fig. 2 and 3, axostylus axostyle 13 comprises inner hollow column of being made by synthetic resin 131 and the outer space stem of being made by the magnetic metal material 132.This outer space stem 132 is set at outside the inner hollow column 131.

Cavity one end of the inner hollow column of being made by synthetic resin 131 has D shape, and the remaining part of these inner hollow column 131 cavitys has cylindrical.In addition, inner hollow column 131 forms terminal

annular protrusion

131a and 131b at its circumference two ends.Simultaneously, inner hollow column 131 has elongated raised 133 on certain position of the cylindrical outer surface of cross-section its cavity D shape portion and cylindrical portion intersecting plane.The intensity of inner hollow column in this part, the focusing that very likely produces stress in this part have been strengthened striding across this intersecting plane place design elongated raised 133.

On the other hand, the outer space stem of being made by metallic material 132 has slightness hole 136 on the position corresponding to elongated raised 133.In the time of on outer space stem 132 places inner hollow column 131, elongated raised 133 is meshed with slightness hole 136, thereby they are combined securely.More suitable mode may be outside open tubular column 132 inwalls corresponding to forming groove on certain position of elongated raised 133 without through hole 136.Inner hollow column and

outer space stem

131 and 132 are made from a variety of materials, and they fuse and are rotated.In addition, the inside and outside open

tubular column

131 and 132 the thickness that provides necessary that combines, thus guaranteed as magnetic clutch axostylus axostyle required sufficient intensity and serviceability.

Have again, inner hollow column 131 is made be longer than the outer space stem, so that under the qualification of inner hollow column 131 terminal

annular protrusion

131a and 131b and 132 liang of end surfaces of outer space stem,

form groove

134 and 135.

The making method of axostylus axostyle 13 is, the inwall of outer space stem 132 with mould external mold part joined, and mould inner mould is partly inserted outer space stem 132 to limit the formingspace of inner hollow column 131, synthetic resin inserted this formingspace again.This mode of production has obtained significant simplification than the conventional mode of production.

In the axostylus axostyle of producing like this 13, inner hollow column 131 is made by synthetic resin, and it has D shape hollow parts, therefore produces engagement with torque transmission shaft (for example presenting the rotatingshaft that axle rolls).Outer space stem 132 is made by the metallic material with magnetic, along this post induced flux.Therefore, axostylus axostyle 13 of the present invention is identical with conventional sintering axostylus axostyle role.Yet, to compare with this sintering axostylus axostyle, the superiority of axostylus axostyle 13 of the present invention is that it can utilize the mode of production of cheap raw material and simplification and make, and this has obtained reduction with regard to the cost of production that makes this axostylus axostyle and magnetic clutch.

Outer space stem 132 can be made by metal tube is cut into particular length.In addition, outer space stem 132 can be cylindrical by sheet metal (as galvanized steel plain sheet) is bent to, and the two ends with this crooked metal sheet shown in Figure 4 for another example are bonded with each other and make.More specifically, an end 1321 of this crooked metal sheet is made a pair of small embossment 1322 and 1323 and big depressions 1326.The other end 1324 of this crooked metal sheet is made big protruding 1325 and an a pair of dolly dimple 1327 and 1328 corresponding to 1321 end small embossments 1322,1323 corresponding to the big depression 1326 of 1321 ends.One end 1321 and the other end 1324 are by connecting small embossment 1322,1323 into dolly dimple 1327,1328 respectively, and projection 1325 connects into big depression 1326 and interconnects greatly.

In addition, an end that can be chosen in axostylus axostyle 13 forms groove 134, and forms flange 138 at the other end of axostylus axostyle 13, as shown in Figure 5.This flange 138 replaces brake hoop 25 as braking device, and this has just reduced the number of components of magnetic clutch.

Also have, can select the end that is formed at outer space stem 132 with one in

detent recess

134 and 135, and the projection qualification that the end face that another groove utilizes outer space stem 132 the other ends and inner hollow column 131 ends form and realizing.In addition, can also select outer space stem 132 is made the same long, and

form detent recess

134 and 135 at the two ends of this outer space stem 132 with inner hollow column 131.

Have, the cavity cross section of inner hollow column 131 can be made triangle, rectangle, ellipse or other Any shape and without D shape again, as long as can guarantee the joint rotation of axostylus axostyle 13 and live axle.In addition, inner hollow column 131 can form the joint rotation device on its whole length.

In addition, can be chosen on the inner hollow column 131 and to form a plurality of protrudingly 133, and form the hole of respective numbers or cave in 136 on the open tubular column 132 outside.Detent recess 134,135 can utilize machined into to make.In addition, the joint rotation of inner hollow column 131 and outer space stem 132 can be between 131 and 132 cylinders application of adhesive and realizing, and do not adopt projection 133 modes that connect into hole 136.

In the magnetic clutch 10 that so constitutes, drive unit 20 effect of unillustrated driving source in the drawings rotates around axostylus axostyle 13 down.Particularly, when electric current flowing through coil 16, this be energized coil 16 around and the magnetic circuit that limited along axostylus axostyle 13 outer space stems 132 and rotor 17 produce the magnetic induction flux.Rotor 17 utilizes the Magnetic leakage flux of passing through hole 19 to overcome the bias force of disc spring 21 and attract armature device 18.At this moment, if armature device 18 together rotates with drive unit 20, then rotor 17 rotates with this armature device 18, and axostylus axostyle 13 then together rotates with rotor 17, because this rotor 17 firmly is fixed on the axostylus axostyle 13.

Otherwise when coil 16 lost excitation, because this coil 16 loses magnetic flux, then the magnetic pull of rotor 17 disappeared.So, inclined to one side at disc spring 21. and put under the effect of power, this armature device 18 returns drive unit 20 and leaves rotor 17.Therefore, even drive unit 20 is still in rotation after coil 16 loses excitation, then this axostylus axostyle 13 can not rotate yet.

Like this, the magnetic clutch 10 that comprises axostylus axostyle 13 of the present invention can be finished required function reliably.

Fig. 6 is the longitudinal section sectional view of the magnetic clutch of alternative plan of the present invention.In the middle of Fig. 6,50 these alternative plan magnetic clutchs of expression.Because the basic structure of magnetic clutch 50 is identical with the magnetic clutch 10 of first scheme, then the parts identical with magnetic clutch 10 are indicated with identical reference number in the parts of magnetic clutch 50, and omit being described in detail of same parts in first and second schemes.

Magnetic clutch 50 has the magnetizer 12 that comprises hollow parts 11.Cylindricality axostylus axostyle 29 rotatably inserts in this hollow parts 11.Field coil 16 is around the outer perimeter of hollow parts 11.Rotor 30 is fixedly mounted on the axostylus axostyle 29.Armature device 18 rotatably is loaded on the axostylus axostyle 29.Drive unit 20 rotatably is contained on this axostylus axostyle.This armature device 18 is together with each other under the effect of disc spring 21 with drive unit 20.

Axostylus axostyle 29 has groove 31 and 32 at its two

ends.Braking device

24 and 25 is disposed at respectively among the groove 31,32 to prevent parts slippage from this axostylus axostyle 29.The hollow parts 11 of magnetizer 12 is equipped with

support

26,27 at its two ends.

As mentioned above, magnetic clutch 50 is identical with the essential structure of magnetic clutch 10, but their axostylus axostyle and rotor are had any different.Particularly, hollow shaft 29 is made by the single cylindrical member of machining.Rotor 30 is made of interior device 301 and the size outer device 302 greater than interior device 301, shown in Fig. 7 and 8.In device 301 and outer device 302 annular of respectively doing for oneself.

Interior device 301 has center hole 3011.Equally, the outer perimeter of device 301 1 sides in first annular protrusion 3012 is formed at, and second annular protrusion 3013 is formed at the interior circumference of interior device 301 opposite sides.Outer device 302 has center hole 3021.The diameter of center hole 3021 equals the external diameter of second annular protrusion 3013.Equally, this outer device 302 forms annular wall 3022 at its edge, has three through

holes

3023,3024 and 3025 thereon.

Rotor 30 is constituted by inside and outside device, and its mode is, interior device 301 is placed space that outer device 302 annular wall 3022 are limited and second annular wall 3013 of interior device 301 is disposed among the center hole 3021 of outer device 302.

The manufacturing of interior device 301 shown in Figs. 9 to 11.At first, as shown in Figure 9, become the particular circle plate-like to make the elementary interior device 301a that makes by the metallic material with magnetic (as ferrous material) plate stamping thereby utilize.Then, as shown in figure 10, utilize punch die to carry out punching press to be formed centrally through hole 3011 therein to this elementary interior device 301a.Then, device 301a processes in through hole 3011 elementary to having to utilize pressing mold, along forming first annular protrusion 3012 on the one side outer perimeter, and forms second annular protrusion 3013 at its opposite side along the circumference of through hole 3011, as shown in figure 11.Like this, interior device 301 is made and is finished.

Can be chosen in the stage shown in Figure 9, promptly plate stamping become the specific discoidal through hole 3011 that forms simultaneously.Equally, as shown in figure 12, in elementary, do not form under the condition of through hole 3011 on the device 301a, also can be with this elementary interior device 301a die forming, form first annular protrusion 3012 in outer perimeter, and in its opposite side, be formed centrally circular protrusions 3014 along the one side.Then, can in this is elementary, install the center of 301a and make through hole 3011, thereby form second annular protrusion 3013.

The manufacturing of outer device 302 is shown in Figure 13 to 15.At first, as shown in figure 13, make the plectane 302a that makes by the metallic material with magnetic (as ferrous material).Then, as shown in figure 14,302a carries out mold pressing to this plectane, is forming annular wall 3022 along its outer perimeter to obtain elementary outer device 302b, and diameter of this elementary outer device is greater than the diameter that installs 301a in elementary.Can find out significantly that from Figure 14 elementary outer device 302b has the space that is limited by annular wall 3022.Then, utilize punch die that elementary outer device 302b is carried out punching press to be formed centrally through hole 3021 therein, the diameter of this through hole just matches with second annular protrusion 3013 of interior device 301.Like this, just obtained the outer device 302 of diameter greater than interior device 301 diameters.

In this scheme, tabular disk 302a shown in Figure 13 obtains by the stamping material plate.But, also can when utilizing punching press to handle this tabular disk 302a of making, form through hole 3021.In this case, only need device 302 outside the outer perimeter formation annular wall 3022 along this tabular disk 302a just can obtain.

The manufacturing of rotor 30 is about to as above made interior device 301 and installs 302 outward fit together shown in Figure 16 and 17.At first, as shown in figure 16, interior device 301 is placed among the outer device 302, and second annular protrusion 3013 of interior device 301 is coupled among the through hole 3021 of outer device 302.Then, utilize the outer perimeter of device 301 second annular protrusions 3013 in the punch die punching press and this circumference is deformed, thereby device 301 is closely linked with outer device 302 in making.

Then, as shown in figure 17, punching press installs 302 outward to form

hole

3023,3024,3025.In Figure 17, have only hole 3023 to be drawn.At last, at interior device 301 with install 302 whole surface outward coated with coating.Like this, just, made rotor 30.

Hole

3023,3024 and 3025 can form in the stage that forms tabular disk 302a as Figure 13 in advance, or forms in the stage that forms through hole 3021 as Figure 15 in advance.In addition, all holes all can be in advance form when forming tabular disk 302a.Under latter event, device outside the tabular disk with through hole 3021 and hole 3023 to 3025 is counted as.

Have, interior device 301 can not use stamping tool and utilizes tackiness agent to realize with closely being connected mutually of outer device 302 again.In addition, also can utilize following mode that interior device 301 and outer device 302 are closely linked together, the diameter of device 301 second annular protrusions 3013 is done to such an extent that be slightly larger than the outer diameter that installs 302 through holes 3021 in being about to, and with power of enforcement second annular protrusion 3013 is inserted this through hole 3021 again.

In addition, can select the plate of material of the steel plate (as galvanized steel) of metallizing layer as outer device 302.This coating that will save external device 302 applies.Therefore, have only interior device 301 to need plating.Equally, compare with the situation of rotor 30 whole exposed surfaces being carried out plating, the sort of mode is accompanied by because the defective that size is big and its sedimentary layer of Heavy Weight damage easily, and be difficult to adopt the coating method (as tumble-plating process) that is beneficial to batch process, and utilize coated steel sheet will reduce the plating process as outer device materials, promptly only need internal device to carry out plating, and the feasible plating work (as barrel plating) that can be beneficial to batch process, and this has just increased the manufacturing efficiency of rotor.

As mentioned above, rotor 30 is made of with outer device 302 the interior device 301 of independent processing separately.Therefore, each parts can be produced with easier mode.Like this, and compare, can simplify the mode of production, and reduce the cost of production of rotor therefrom with single materials processing rotor.

The magnetic clutch 50 that contains the rotor 30 of structure like this, the working principle of its working principle and the first scheme magnetic clutch 10 is similar.Particularly, when coil was energized, the induction magnetic flux was around this excited coils 16 and along being produced by magnetizer 12, axostylus axostyle 29 and magnetic circuit that rotor 30 limited.Rotor 30 is by the Magnetic leakage flux of passing these rotor 30 through

holes

3023,3024 and 3025, overcomes the bias force of disc spring 21 and armature device 18 is attracted to come.Like this, rotor 30 together rotates with drive unit 20, thereby because rotor 30 firmly is fixed in axostylus axostyle 29, this axostylus axostyle 29 also together rotates with rotor 30.Otherwise when coil 16 lost excitation, the magnetic pull of this coil 16 disappeared, and axostylus axostyle 29 stops operating.

Can select the axostylus axostyle 13 of the first scheme magnetic clutch 10 is applied to the magnetic clutch of alternative plan.At this moment, the cost of production of axostylus axostyle and rotor all can reduce, thereby further reduces the cost of production of magnetic clutch.

Figure 18 is the longitudinal section sectional view of the magnetic clutch of third party's case of the present invention.In Figure 18,60 expression magnetic clutchs.Because the basic structure of magnetic clutch 60 is identical with the first scheme magnetic clutch 10, so part identical with magnetic clutch 10 parts in the magnetic clutch 60 indicates with same numeral, and omit to first and third party's case in the detailed introduction of similar elements.

Magnetic clutch 60 has the magnetizer 12 that comprises hollow parts 11.Cylindrical axostylus axostyle 34 rotatably inserts in the hollow parts 11.Field coil 16 is around in around the hollow parts 11.Rotor 17 is fixedly mounted on the axostylus axostyle 34.Armature device 18 is rotatably mounted on the axostylus axostyle 34.Drive unit 20 rotatably is loaded on the axostylus axostyle 34.Armature device 18 closely links together with drive unit 20.When field coil was unexcited, armature device 18 was offset on the drive unit 20 by disc spring 21.

Axostylus axostyle 34 has

groove

35,36 at its two

ends.Brake hoop

24,25 is disposed at respectively among the

groove

34,35 to prevent parts slippage from the axostylus axostyle 34.Hollow parts 11 is equipped with

support

26,27 at its two ends.

Magnetizer 12 has truncation part 37 in its open end.Braking device 38 is placed among this truncation part 37.This braking device 38 is made by the material of synthetic resin and so on.(this figure is the amplification diagram of braking device 38) as shown in figure 19, this braking device 38 has in order to the mounting portion 381 that is fitted to magnetizer 12 with in order to produce the contact segment 382 of sliding contact with rotor 17 outer cylinder surfaces.The bottom surface of the mounting portion 381 that comes in contact with magnetizer 12 outer perimeter is bent to arc according to the shape of these magnetizer 12 outer perimeter.The bottom surface of contact segment 382 is bent to arc according to the shape of rotor 17 outer circumferential surface.

The braking device of so making 38 is disposed among the truncation part 37 of magnetizer 12, and the outer surface of the bottom surface of its mounting portion 381 and magnetizer 12 joins.In addition, braking device 38 logical spring assemblies 40 are urged downwardly.Spring assembly 40 firmly is fixed on the magnetizer 12 by screw 39.Spring assembly 40 is pushed braking device 38 to below, thereby the contact segment 382 of this braking device 38 and the outer perimeter of rotor 17 are come in contact.

The magnetic clutch 60 that constitutes like this, the working principle of its working principle and the first scheme magnetic clutch 10 is similar.Particularly, when coil 16 is energized, produce the induction magnetic flux in this excited coils 16 with along the magnetic circuit that magnetizer 12, axostylus axostyle 34 and rotor 17 are limited.The Magnetic leakage flux that rotor 17 utilization is passed through hole 19 overcomes the bias force of disc spring 21 and armature device 18 is attracted to come.Rotor 17 together rotates with drive unit 20, and because rotor 17 firmly is fixed on the axostylus axostyle 34, this axostylus axostyle 34 together rotates with rotor 17.Otherwise when coil 16 lost excitation, magnetic pull disappeared, and axostylus axostyle 34 stops operating.

Axostylus axostyle 34 is in response to the de-excitation of coil 16, utilizes contacting and stall immediately of braking device 38 and rotor 17.Like this, axle pavilion 34 just can be parked in certain special position reliably and keep its state of rest on this stop position.Because spring assembly 40 has guaranteed contact condition between rotor 17 and braking device 38 contact segments 382, thus can not take place clutch 60 turn-off after rotor 17 with the situation of drive unit 20 rotations

If without spring 40, braking device 38 also can utilize tackiness agent or directly the mounting portion 381 of this braking device 38 is fixed on the magnetizer 12 with screw in the installation on the magnetizer 12.In addition, can be chosen on the magnetizer 12 and to form through hole replacing truncation part 37, and the contact segment 382 of braking device 38 is shaped according to the shape of through hole on this magnetizer 12.

In addition, the contact surface of braking device 38 contact segments 382 can be configured as shapes such as taper or wedge shape, so that when rotor 17 forward directions rotate, this rotor 17 is added any braking force hardly, and when rotor 17 counterrotatings, this rotor 17 is applied very big braking force.This will make and stop or keeping rotor more reliable in the target location.

The braking device 38 of third party's case magnetic clutch 60 also can be applicable to the magnetic clutch 10 of first scheme, the magnetic clutch 50 of alternative plan, or is applied to be equipped with among the magnetic clutch 50 of axostylus axostyle 13 in the magnetic clutch 10.

Have, the

axostylus axostyle

13,29,34 of magnetic clutch 10,50,60 contains the magnetic circuit part separately again, along this magnetic circuit part induced flux.In addition, the available nonmetallic material of the axostylus axostyle 29 of magnetic clutch 50 (or axostylus axostyle 34 of magnetic clutch 60) (as not containing the synthetic resin of magnetic) are made, and the formation of magnetic circuit also can be different from axostylus axostyle 29 (or 34).

Although all narrations of the present invention should be appreciated that knowing the people of art technology all by the example that accompanying drawing provided, obviously can carry out various changes and correction.Therefore, as long as this change and correction do not depart from the scope of the present invention, they just should be contained among the present invention.

Claims

1. magnetic clutch comprises:

The center has cavity and is loaded with the magnetizer of annular field coil;

Rotatably place the axostylus axostyle in this magnetizer cavity, this axostylus axostyle comprises:

Make and axially have the interior cylindrical device of cavity by synthetic resin along it, its hollow cavity can be meshed with the torque transmission shaft of the device that is connected to magnetic clutch in operation process, and this cavity has asymmetrical shape and together rotates to guarantee torque transmission shaft and interior cylindrical device;

Place the exterior cylindrical device on the interior cylindrical device, this exterior cylindrical device is made by the metallic material with magnetic;

With the rotor arrangement that the exterior cylindrical device firmly joins, this rotor arrangement is set at a side of magnetizer;

Be rotatably installed in the drive unit on the exterior cylindrical device, this drive unit is set at a side of rotor arrangement;

The armature device that links to each other with drive unit, this armature device are set between rotor arrangement and the drive unit and to the rotor arrangement bending.

2. according to the magnetic clutch of claim 1, wherein the interior cylindrical device has projection at its outer surface special position, and the exterior cylindrical device has hole on its peripheral wall, and this hole can be meshed with this projection when this exterior cylindrical device places on the interior cylindrical device.

3. according to the magnetic clutch of claim 2, wherein the interior cylindrical device is longer than the exterior cylindrical device, this interior cylindrical device comprises expose portion, this part is stretched out the terminal edge of this exterior cylindrical device and is formed groove simultaneously when the exterior cylindrical device places on the interior cylindrical device, dispose securing means in this groove.

4. according to the magnetic clutch of claim 1, wherein the interior cylindrical device is longer than the exterior cylindrical device, this interior cylindrical device comprises expose portion, this part is stretched out the terminal edge of this exterior cylindrical device when the exterior cylindrical device places on the interior cylindrical device, and forming groove simultaneously, this interior cylindrical device is equipped with the securing means that places among the groove.

5. according to the magnetic clutch of claim 1, wherein also comprise braking device, this braking device firmly is fixed on the magnetizer and comes in contact with rotor arrangement in the course of the work.

6. magnetic clutch comprises:

The center has cavity and is loaded with the magnetizer of annular field coil;

Rotatably place the axostylus axostyle of this magnetizer cavity;

Be fixedly connected on the rotor arrangement on this axostylus axostyle, this rotor arrangement is set at a side of magnetizer, and this rotor arrangement comprises device and the outer device of annular in the annular, and this outer device size is greater than interior device size;

Be rotatably installed in the drive unit on the axostylus axostyle, this drive unit is set at a side of this rotor arrangement;

Be connected in the armature device of this drive unit, this armature device is set between rotor arrangement and the drive unit and to this rotor bow.

7. according to the magnetic clutch of claim 6, installing therein wherein, the heart has through hole, has first annular protrusion in outer perimeter along the one side surface, and have second annular protrusion at circumference along its opposite side surface through hole, outer device has annular wall along its outer perimeter, and the heart has through hole therein, and the through hole of this outer device can be meshed with second annular protrusion of interior device, and this outer device has hole between annular protrusion and through hole.

8. according to the magnetic clutch of claim 7, wherein in second annular protrusion by internal device of being mutually permanently connected of device and outer device be out of shape and realize.

9. according to the magnetic clutch of claim 6, wherein axostylus axostyle comprises by synthetic resin and makes and axially have the electric cylindrical device of cavity along it, this cavity is connected the device of magnetic clutch with preparation in operation process torque transmission shaft is meshed, and this cavity has asymmetrical shape and together rotates to guarantee this torque transmission shaft and interior cylindrical device, this axostylus axostyle also comprises the exterior cylindrical device that places on the interior cylindrical device, and this exterior cylindrical device is made by the metallic material with magnetic.

10. according to the magnetic clutch of claim 6, wherein also comprise braking device, this braking device is fixed on the magnetizer firmly and can comes in contact with rotor arrangement in operation process.

11. magnetic clutch comprises:

The center has cavity and is loaded with the magnetizer of annular field coil;

Rotatably place the axostylus axostyle of this magnetizer cavity;

Be fixedly connected on the rotor arrangement on this axostylus axostyle, this rotor arrangement is set at a side of magnetizer;

Be rotatably mounted in the drive unit on the axostylus axostyle, this drive unit is set at a side of this rotor arrangement;

Be connected in the armature device of this drive unit, this armature device is set between rotor arrangement and the drive unit and to this rotor arrangement bending;

Firmly be fixed on the magnetizer and the on-stream braking device that comes in contact with rotor arrangement.

12. according to the magnetic clutch of claim 11, wherein braking device comprises mounting portion of assembling with magnetizer and the contact segment that comes in contact with rotor arrangement in operation process.

13. according to the magnetic clutch of claim 12, wherein magnetizer also is equipped with pressing device in order to braking device is pushed to rotor arrangement.

14. magnetic clutch comprises:

The center has cavity and is loaded with the magnetizer of annular field coil;

Rotatably place the axostylus axostyle of this magnetizer cavity, this axostylus axostyle comprises:

Make and axially have the interior cylindrical device of cavity by synthetic resin along it, this cavity can be connected the device of magnetic clutch with preparation in operation process torque transmission shaft is meshed, and has the asymmetrical shape part in order to guarantee that this torque transmission shaft together rotates with the interior cylindrical device;

Be fixedly connected on the rotor arrangement of this exterior cylindrical dress, this rotor arrangement is set at a side of magnetizer and comprises device and the outer device of annular in the annular, and the outer device size of this annular is greater than interior device size;

With the armature device that this drive unit links to each other, this armature device is set between rotor arrangement and the drive unit and to this rotor arrangement bending;

Firmly be fixed on the magnetizer and the braking device that in operation process, comes in contact with rotor arrangement.

15. be used for the axostylus axostyle of magnetic clutch, comprising making by synthetic resin and axially having the interior cylindrical device of cavity along it, this cavity is connected the device of magnetic clutch with preparation in operation process torque transmission shaft is meshed, and has the asymmetrical shape part to guarantee that this torque transmission shaft together rotates with the interior cylindrical device, this axostylus axostyle also comprises the exterior cylindrical device that places on the interior cylindrical device, and this exterior cylindrical device is made by the metallic material with magnetic.

16. according to the axostylus axostyle of claim 15, wherein the interior cylindrical device has projection at its outer surface special position, and this exterior cylindrical device has hole on its peripheral wall, this hole can be meshed with this projection when this exterior cylindrical device places on the interior cylindrical device.

17. axostylus axostyle according to claim 15, wherein the interior cylindrical device is longer than the exterior cylindrical device, this interior cylindrical device comprises expose portion, this expose portion stretches out the edge of this exterior cylindrical device end on the exterior cylindrical device places the interior cylindrical device time and forms groove simultaneously, and this interior cylindrical device is equipped with the securing means that places among the groove.

18. be used for the rotor of magnetic clutch, it comprises:

The outer device of device and annular in the annular, this outer device size is greater than interior device size;

Should in install therein that the heart has through hole, form first annular protrusion in outer perimeter, and form second annular protrusion along the circumference of through hole on its opposite side surface along the one side surface;

Should form annular wall along its outer perimeter by outer device, and be formed centrally through hole therein, the through hole of this outer device can be meshed with interior device second annular protrusion, and device places the outer device space that annular wall limited in being about to, and this outer device has hole.

19. according to the rotor of claim 18, wherein interior device and outer device utilization are out of shape second annular protrusion that installs in this and are closely linked mutually.

20. be used for the production method of the rotor of magnetic clutch, it may further comprise the steps:

Make device in the annular, this installs therein that the heart has center hole, has first annular protrusion in the outer perimeter along the one side surface, and has second annular protrusion on its opposite side surface along the through hole circumference;

Make the outer device of annular, this device has annular wall along its outer perimeter, and the heart has center hole therein, and has hole between this center hole and annular wall, this center hole can be meshed with second annular protrusion of interior device, and this outer device size is greater than interior device size;

Interior device and outer device are interconnected, and its mode is install among the space that annular wall limited outside device in this is placed, and second annular protrusion of device to place among the outer center hole that installs in will being somebody's turn to do.

21. according to the method for claim 20, wherein in the device with install by second annular protrusion that installs in this being out of shape and closely linking together mutually outward.

22. be used for the production method of the rotor of magnetic clutch, it may further comprise the steps:

Make device in the annular, this installs therein that the heart has center hole, has first annular protrusion in the outer perimeter along the one side surface, and the circumference on its opposite side surface along center hole has second annular protrusion;

Make the outer device of annular, this device has annular wall along its outer perimeter, and the heart has center hole therein, and this center hole can be meshed with second annular protrusion of interior device, and this outer device size is greater than interior device size;

Interior device and outer device are interconnected, and its mode is install among the space that annular wall limited outside device in this is placed, and second annular protrusion of device to place among the outer center hole that installs in will being somebody's turn to do;

Device is gone up and is formed hole outside, between the annular wall and center hole that install outside this its position.

23. according to the method for claim 22, wherein in the device with install by second annular protrusion that installs in this being out of shape and closely linking together mutually outward.

24. be used for the production method of the rotor of magnetic clutch, it may further comprise the steps:

The tabular disk that the center is had center hole is configured as interior device, and device has first annular protrusion in the outer perimeter along the one side surface in this, and the circumference on its opposite side surface along center hole has second annular protrusion;

With sheet material forming is the discoid elementary outer device with annular wall, be formed centrally center hole in outside this is elementary, installing again, this center hole can be meshed with second annular protrusion of interior device, thereby makes outer device, and this outer device size is greater than interior device size;

25., wherein should interiorly install and install by second annular protrusion that installs in this being out of shape and closely linking together mutually outward according to the method for claim 24

26. be used for the production method of the rotor of magnetic clutch, it may further comprise the steps:

Tabular disk is configured as elementary interior device, device had first annular protrusion in the outer perimeter along the one side surface in this was elementary, and having central protuberance at its opposite side centre of surface, the central protuberance place of device forms center hole in this is elementary again, thereby makes interior device;

With sheet material forming is the discoid elementary outer device with annular wall, be formed centrally center hole in outside this is elementary, installing again, this center hole can be meshed with the central protuberance of installing in this, thereby makes outer device, and this outer device size is greater than interior device size;

Interior device and outer device are interconnected, and its mode is install among the space that annular wall limited outside device in this is placed, and the central protuberance of device to place among the outer center hole that installs in will being somebody's turn to do;

27. according to the method for claim 26, wherein in the device with install by second annular protrusion that installs in this being out of shape and closely linking together mutually outward.

28. be used for the production method of the rotor of magnetic clutch, it may further comprise the steps:

The tabular disk that the center is had center hole is configured as interior device, and device has first annular protrusion in the outer perimeter along the one side surface in this, and has second annular protrusion on its opposite side surface along the center hole circumference;

Sheet material is processed into discoid elementary outer device with annular wall, be formed centrally center hole in outside this is elementary, installing again, this center hole can be meshed with second annular protrusion of interior device, thereby makes outer device, and this outer device size is greater than interior device size;

Should interconnect with outer device by interior device, its mode is install among the space that annular wall limited outside device in this is placed, and the central protuberance of device to place among the outer center hole that installs in will being somebody's turn to do;

Outside this, form hole on the device, between the annular wall and center hole that install its position outside this.

29. according to the method for claim 28, wherein in the device with install by second annular protrusion that installs in this being out of shape and closely linking together mutually outward.

30. be used for the production method of the rotor of magnetic clutch, it may further comprise the steps:

In tabular disk, be formed centrally center hole;

Should be processed into interior device by tabular disk, device has first annular protrusion in the outer perimeter along the one side surface in this, and has second annular protrusion on its opposite side surface along the circumference of center hole;

Interior device and outer device are interconnected, and its mode is install among the space that annular wall limited outside interior device is placed, and the central protuberance of device to place among the outer center hole that installs in will being somebody's turn to do;

31. according to the method for claim 30, wherein in the device with install by second annular protrusion that installs in this being out of shape and closely linking together mutually outward.

32., wherein also be included on the whole exposed surface that installs in this and install outward and apply coating according to the method for claim 30.

33. be used for the production method of the rotor of magnetic clutch, it may further comprise the steps:

In tabular disk, be formed centrally center hole;

Apply coating on the whole exposed surface that in this, installs;

The plating plate is configured as discoid elementary outer device with annular wall, be formed centrally center hole in outside this is elementary, installing again, this center hole can be meshed with second annular protrusion of interior device, thereby makes outer device, and this outer device size is greater than interior device size;

34. according to the method for claim 33, wherein in the device with install by second annular protrusion that installs in this being out of shape and closely linking together mutually outward.