CN85204667U - Electromagnetic brake with rotary disk including permanent magneto - Google Patents
Electromagnetic brake with rotary disk including permanent magneto Download PDFInfo
- Publication number
- CN85204667U CN85204667U CN 85204667 CN85204667U CN85204667U CN 85204667 U CN85204667 U CN 85204667U CN 85204667 CN85204667 CN 85204667 CN 85204667 U CN85204667 U CN 85204667U CN 85204667 U CN85204667 U CN 85204667U
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- rotation disc
- permanent
- permanent magnetic
- magnetic rotation
- permanent magnetism
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- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
The utility model relates to an electromagnetic brake with a rotating disk with permanent magnetism, which is used for forming a fast starting and stopping motor. The center of a rotating disk is provided with a permanent magnetism body; a sliding bush can rotate along with a shaft and freely slide in an axial direction on a rotary shaft; a magnetizer and the sliding bush form a closed magnetic circuit, and the magnetizer is fixedly installed on a casing or a bearing cap. A magnetic attractive force and a friction force generate brake torque; an electromagnetic coil in the magnetizer generates a reverse magnetic field to repel the rotating disk with permanent magnetism when electrified for relieving brake. The brake has the advantages of smooth and stable running, simple structure, fast starting and stop, long service life and reliability. The electromagnetic brake with a rotating disk with permanent magnetism is especially suitable for forming a small and a miniature fast starting and stopping motor and is suitable for frequently fast started and stopped servo systems, follow-up systems and electric actuators of various specifications.
Description
The utility model is a kind of electromagnetic brake, is used to have the braking of running shaft machine, is suitable on the motor of various band brake functions.
General electromagnetic brake all has the Moving plate and the quiet dish that can not change that rotate with axle, common quiet dish can move axially And and by the elastic force of spring two dishes be compressed, produce braking moment by friction, when switching on, produce the suction-combining force with an electromagnet, the low spring force that disappears unclamps the quiet dish of Moving plate and frees braking.Owing to adopted elastic element, the braking force of this class electromagnetic brake and free the required electromagnetic force significant change of braking along with mechanical wear, it is long to open the left alone without help time, poor reliability, working life is very limited.The DE3234718 patent provided a kind of device of regulating the gap afterwards, attempted to compensate the variation that brings because of wearing and tearing with the way of regulating, but can only be used for low braking frequency and allow to do the occasion of this adjusting, and this improvement does not have contribution to opening the left alone without help time.
Patent SU928540 proposes a kind of left alone without help reliable electromagnetic brake that opens soon.Its essential implementation is pack in the flange plate fan permanent-magnet steel and armature, and the axle of lengthening flange plate fan is overlapping a magnetic inductive block that is fixed on bearing support but can does displacement at axial-radial slightly on the axle between flange plate fan and the rotor.Owing to substitute spring pressure with the magnetic attraction of permanent-magnet steel, the no longer frayed influence of braking force and constant.Freeing of braking is to produce opposite magnetic field by the electromagnetic coil in the magnetic inductive block when switching on to make magnetic inductive block break away from the flange disk fan vertically.This electromagnetic brake has all been obtained breakthrough aspect left alone without help speed and the reliability opening.
But the technology that patent SU928540 provided is difficult to be applicable to motor demanding to runnability and that size is little, device is complicated, the magnetic inductive block that is enclosed within on the axle certainly will prolong rotatingshaft, is fixed on the flange fan that prolongs axle head and is difficult to turn round steadily under high speed rotating.This structure especially is not suitable in the micro motor.
The utility model provides a kind of electromagnetic brake of the band permanent magnetic rotation disc that turns round steady, simple in structure, is used for constituting opening left alone without help motor fast, is specially adapted to need frequently to open fast the electric actuator of left alone without help servo-system, followup system and all size.
Solution is the axle head that the disk of being made by steel or other permeability magnetic materials (1) directly is enclosed within motor, it was both rotated with axle, can axially freely slide flexibly in the certain limit again, only need to make a trepanning, by accomplishing with the suitable mechanical engagement of axle in rolling disc back side central authorities.The disk front is recessed dish type, and central authorities install the permanent magnetism body (2) of axial magnetized, for example iron Gan oxygen or aluminium nickel cobalt material.The rotating disk of magnetic conduction constitutes permanent magnetic rotation disc (1 and 2) with the permanent magnetism body, slides on the running shaft (7), and rotating ， And with axle can axially be free to slide in the certain limit flexibly.Relative with the permanent magnetic rotation disc front have a magnet case made from permeability magnetic material (as soft iron) (9 and 10).Magnetic conduction physical efficiency and permanent magnetic rotation disc constitute closed magnetic circuit, neither change can not move axially again, are packed on the bearing cap of casing or rotating shaft.In magnet case (9 and 10) electromagnetic coil (11) is housed, the energising back produces the magnetic field opposite with permanent magnetic rotation disc, is enough to permanent magnetic rotation disc is pushed open, and it is moved along axle, runs into the trepanning bottom until axle head.At this moment, between permanent magnetic rotation disc and magnet case, form a working clearance d.The gap is too greatly to be unfavorable for opening fast left alone without help De ， And and can size to be increased because of needs increase extra magnetic force, but the gap too the young pathbreaker increase technologic difficulty, reasonably gap size is between 0.8～3mm.
Suitable mechanical engagement between above described trepanning and rotating shaft can make to have axial some prominent key by the spline wheel (5) of a middle transition.Have corresponding axial keyway at the trepanning inwall, spline wheel can be in axial sliding therein and must not rotate.The spline wheel installs with keyway or additive method with running shaft.Many spline wheels only are in order to make the permanent magnetic rotation disc standardization or to be applicable to the special occasions that power is bigger.Simpler coordinated scheme is that the square with the axis pin (23) of Zhou Xin And is passed through in riveting one on trepanning, then leave one in the end of running shaft and can hold the axial slots that this pin becomes flexible slip within it, pin is gone up the line of rabbet joint with axle and can only must not be relatively rotated in axial slide relative.Suchlike cooperation needn't be enumerated one by one.In a word, the simplest formation of electromagnetic brake described in the utility model only is the magnet case of charged magnetic coil in a permanent magnetic rotation disc and.
Permanent magnetic rotation disc itself also has the slimmest and the most graceful form of the composition.Permanent magnetic rotation disc is made of the disk of permanent magnetism body and back side band trepanning, the disk front is the concave disks of the magnetic conduction bulge loop of marginal zone projection, the width of magnetic conduction bulge loop is to design by such principle, will consider enough magnetic conduction cross sections on the one hand, the end face that will consider the magnetic conduction bulge loop on the other hand will be the rubbing surface that produces main braking moment.The permanent magnetism body of central authorities can be only piece disk, also can and become disk by some.In order to prevent magnet short-cut path, between magnetic conduction bulge loop and permanent magnetism body, leave annular space band (3).The permanent magnetism body can be packed on the disk by means of the non-magnetic pressure ring that is embedded in the band of annular space, and also available various high duty metal binders are bonded on the disk.The end face height of the permanent magnetism body after installing does not exceed the end face height of magnetic conduction bulge loop.
The end surface shape size of magnet case should be consistent with permanent magnetic rotation disc, and its axial cross section is the same with permanent magnetic rotation disc axial cross section shape, is E shape, adorns relatively, constitutes closed magnetic circuit.Electromagnetic coil is inlaid in the annular ditch band of magnet case, and the energising back produces the axial direction of magnetization magnetic field opposite with permanent magnetic rotation disc, and its result causes permanent magnetic rotation disc to free braking vertically away from magnet case.After the outage, this repulsion magnetic force disappears, and working immediately in the magnetic field that permanent magnetic rotation disc itself is had, causes permanent magnetic rotation disc to press to magnet case vertically rapidly, produces braking moment on surface of contact.
In order to accelerate to open left alone without help speed, the atmidometer in the course of action is very important, promptly will consider positice ground effect and the effect of the suction (atmospheric pressure) in the repulsion process in the attracting process.For this reason, further improvement of the present invention is to make some vents or vent slot on magnet case and permanent magnetic rotation disc, accelerates to open left alone without help process to eliminate atmidometer.For example, can make an axial vent (14) in magnet case newel central authorities, magnetic conduction bulge loop end face at permanent magnetic rotation disc is made radially vent slot, or in annular space band (3), make some axial vents or radially pass the vent of magnetic conduction bulge loop, when using not the magnetic conduction pressure ring, axially vent should see through pressure ring.
Owing to adopt above-mentioned complex art, electromagnetic brake described in the utility model slides over permanent magnetic rotation disc (Moving plate) running shaft and magnet case is installed motionless, have minimum parts in addition and the simple characteristics of installation and processing are arranged, design size can be dwindled greatly, can be applicable to minute sized motor.Because rotatable parts Qing Qiao And is near rotor, it is extremely steady to turn round.The slim and graceful rotor and the elimination of atmidometer make opens left alone without help speed and further improves.The 25W squirrel-cage motor of for example following embodiment's indication is installed the electromagnetic brake of band permanent magnetic rotation disc of the present invention, and the period of braking of surveying under rated load was less than 0.1 second, and starting time was less than 0.05 second.
Description of drawings:
Fig. 1 is the electromagnetic brake sectional view that is loaded on the band permanent magnetic rotation disc of micro motor tail end;
Fig. 2 is the A-A sectional drawing of expression trepanning, spline wheel and running shaft relation;
Fig. 3 is employing pin and the permanent magnetic rotation disc of rotating shaft line of rabbet joint cooperation and the installation sectional view of running shaft;
Fig. 4 is the B-B sectional drawing that the trepanning of pin is housed;
Fig. 5 is embodiment's a electrical schematic diagram.
The embodiment that the utility model provides is the electromagnetic brake that is installed in the band permanent magnetic rotation disc on the closed self cooling mouse cage servomotor of 25W, is loaded in the shell of this motor sealing, and its structure sees Fig. 1, shown in Figure 2.(21) are bearing among the figure, and (22) are bearing cap.(1) is the disk of steel back side band trepanning, positive visible magnetic conduction bulge loop and annular space band (3), a disc aluminium nickel cobalt permanent magnetism body (2), axial magnetized are pasted with the high duty metal binder by central authorities, constitute permanent magnetic rotation disc, end face fine-grinding with disk (1).Visible axially pore a pair of (8) in the band of annular space.The trepanning inwall has 6 axial keyways, become sliding with the spline wheel (5) with 6 axially prominent keys and join, and spline wheel itself is by the tight dress of key (6) and rotating shaft (7).For easy to assembly, magnet case is made of magnet case seat (9) and armature (10), all use soft iron to make, electromagnetic coil (11) has coil carrier (12), the coil back of packing into is packed in the magnet case seat on the hood (shell) (15) together with armature with bolt (13), and the vent (14) of porose assurance magnet case central authorities is unimpeded on the hood.Hood itself is installed on the bearing cap (22) with bolt (16), and with its sealing, bearing cap itself is the stator casing some herein.For the littler motor of size, the concave station of stator casing tail end is deepened lengthening, make hood directly radially be anchored on concave station with screw, with regard to desirable growth and decline bolt (16), the diameter of permanent magnetic rotation disc is increased, help further dwindling axial thickness.
The electric principle of present embodiment is seen shown in Figure 5.L1 and L2 are respectively two staor winding of squirrel-cage servomotor, and C1 is a split-phase capacitor, and its appearance value is 6 μ F.K switch has third gear a, b, e corresponding to just changeing, stop, reversing.C2 is a decompression capacitor, the appearance value is 0.69 μ F, alternating voltage is converted to direct current by bridge rectifier D after the C2 step-down, supply with electromagnetic coil L3, C1, C2 and D are installed on the scaffold (19), Fig. 1 demonstrates the back ， And that scaffold (19) is positioned at hood (15) and with an accessories cover (17) it is covered, and bolt (18) is fixed on accessories cover on the magnet case seat.When hood (15) when thickness is enough, it also is desirable on the hood that accessories cover directly is fixed on screw.
Install the back from the visible magnet case of Fig. 1 and axially having the position of determining, the error when to make and installing in order to compensate is adjusted working clearance d, posts an adjustment pad (4) that thickness is suitable bottom trepanning.The working clearance d of present embodiment is taken as 1.2mm.(20) be the rotor limiting gasket,, for example adopted thrust bearing, needn't use limiting gasket (20) again when axially spacing when guaranteed in the rotor design.
The described closed self cooling mouse cage servomotor of present embodiment possesses following the key technical indexes:
1. supply voltage: single-phase 220V, 50HZ;
2. standard: condenser type, reversible;
3. rated power: 25W;
4. period of braking: 0.2sec;
5. starting time: 0.1sec;
6. ambient temperature :-25 ℃～+ 60 ℃;
7. break life-span: be not less than 5,000,000 times and open left alone without help.
Once made running test about the break life-span, under the rated load condition, moved continuously, strip inspection after the accumulative total 500,000 times with the start and stop frequency of per minute 9 times.Measure magnetic intensity with gaussmeter and do not see variation, the wearing and tearing between permanent magnetic rotation disc and the magnet case are less than 0.05mm, still not as good as the mild wear of spline wheel surface.Calculate by this, the not enough 0.5mm of wearing and tearing of braking surface after the start and stop 5,000,000 times, this value does not all have obvious influence to braking moment and start-stop time, so braking life-span of electromagnetic brake of inferring the utility model band permanent magnetic rotation disc is above 5,000,000 times.
Claims (8)
1, the electromagnetic brake of band permanent magnetic rotation disc, be used to have the braking of running shaft machine, be fit to be contained in constitute on the motor and open left alone without help motor fast, need to be specially adapted to frequently open fast left alone without help servo-system, the electric actuator of followup system and all size, has a permanent magnetic rotation disc that rotates with axle (1 and 2), and energy and permanent magnetic rotation disc constitute the magnet case that does not change (9 and 10) of closed magnetic circuit, thereby be equipped with in the magnet case when energising produce with permanent magnetic rotation disc mutually anti-magnetic make the electromagnetic coil (11) of braking force releasing, this coil blackout then produces braking moment by magnetic attraction and frictional force between permanent magnetic rotation disc and magnet case, it is characterized in that: the positive central permanent magnetism body of disk that permanent magnetic rotation disc is made by permeability magnetic material (1) and disk (2) constitutes, there is a trepanning in back side central authorities at disk (1), suitable mechanical engagement makes permanent magnetic rotation disc (1 and 2) slide over running shaft (7) with its trepanning and goes up and to rotate And with axle and can axially be free to slide flexibly in the certain limit d, can axially fix with the magnet case that permanent magnetic rotation disc constitutes closed magnetic circuit, positive relative with permanent magnetic rotation disc is packed on casing or the bearing cap.
2, by the described electromagnetic brake of claim 1, it is characterized in that: axial displacement one end of permanent magnetic rotation disc is limited by magnet case, the other end is limited by rotating shaft end face and cover hole depth, and maximum displacement amount is the working clearance d between permanent magnetic rotation disc and the magnet case, and dimensional range is between 0.8～3mm.
3, by the described electromagnetic brake of claim 1, it is characterized in that: be fixed with the spline wheel (5) that has an axially prominent key at least on the running shaft (7), the trepanning inwall is done to have and the sliding axial keyway of joining of spline wheel (5), and trepanning and spline are taken turns behind the suit axially slide relative and must not be relatively rotated.
4, by the described electromagnetic brake of claim 1, it is characterized in that: the trepanning riveting has one by the square with the axis pin (23) of Zhou Xin And, the running shaft end has and can hold the axial slots that this pin becomes flexible slip within it, and pin is gone up the line of rabbet joint with axle and can must not be relatively rotated in axial slide relative.
5, by claim 1,2,3 described electromagnetic brakes, it is characterized in that: disk (1) has the spill disk of projection magnetic conduction bulge loop for the steel front edge, central authorities install the permanent magnetism body (2) of axial magnetized, the annular space band (3) that prevents magnet short-cut path is arranged between magnetic conduction bulge loop and the permanent magnetism body, and the end face height of permanent magnetism body is no more than the end face height of magnetic conduction bulge loop.
6, by the described electromagnetic brake of claim 5, it is characterized in that: doing on magnet case and permanent magnetic rotation disc has vent (8,14) or the vent slot of eliminating atmidometer.
7, by claim 1,2,4 described electromagnetic brakes, it is characterized in that: disk has the spill disk of projection magnetic conduction bulge loop for the steel front edge, central authorities install the permanent magnetism body of axial magnetized, the annular space band that prevents magnet short-cut path is arranged between magnetic conduction bulge loop and the permanent magnetism body, and the end face height of permanent magnetism body is no more than the end face height of magnetic conduction bulge loop.
8, by the described electromagnetic brake of claim 7, it is characterized in that: doing on magnet case and permanent magnetic rotation disc has vent or the vent slot of eliminating atmidometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85204667 CN85204667U (en) | 1985-10-29 | 1985-10-29 | Electromagnetic brake with rotary disk including permanent magneto |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85204667 CN85204667U (en) | 1985-10-29 | 1985-10-29 | Electromagnetic brake with rotary disk including permanent magneto |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85204667U true CN85204667U (en) | 1986-10-22 |
Family
ID=4799924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85204667 Withdrawn CN85204667U (en) | 1985-10-29 | 1985-10-29 | Electromagnetic brake with rotary disk including permanent magneto |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85204667U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085598C (en) * | 1995-08-18 | 2002-05-29 | 耿锡锟 | Car for travelling up steps or slope |
| CN101865224A (en) * | 2010-07-19 | 2010-10-20 | 无锡市华灵电机开关有限公司 | Permanent magnet safe brake |
| CN102330762A (en) * | 2011-07-22 | 2012-01-25 | 江苏安捷汽车配件有限公司 | Braking device using Rb-Fe-B magnet |
| CN102582445A (en) * | 2012-04-10 | 2012-07-18 | 上海中科深江电动车辆有限公司 | Electromagnetic mechanism for parking electric drive automobile |
| CN105114486A (en) * | 2015-07-30 | 2015-12-02 | 南京纳帝机电技术有限公司 | Electromagnetic neck-type brake |
| CN107498084A (en) * | 2017-10-23 | 2017-12-22 | 浙江昊光电子科技有限公司 | The cleaning and catch component that a kind of lighting apparatus makes |
| CN118473130A (en) * | 2024-07-09 | 2024-08-09 | 台邦电机工业集团有限公司 | Low-power electromagnetic braking motor device |
-
1985
- 1985-10-29 CN CN 85204667 patent/CN85204667U/en not_active Withdrawn
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085598C (en) * | 1995-08-18 | 2002-05-29 | 耿锡锟 | Car for travelling up steps or slope |
| CN101865224A (en) * | 2010-07-19 | 2010-10-20 | 无锡市华灵电机开关有限公司 | Permanent magnet safe brake |
| CN101865224B (en) * | 2010-07-19 | 2012-12-26 | 无锡市华灵电机开关有限公司 | Permanent magnet safe brake |
| CN102330762A (en) * | 2011-07-22 | 2012-01-25 | 江苏安捷汽车配件有限公司 | Braking device using Rb-Fe-B magnet |
| CN102330762B (en) * | 2011-07-22 | 2013-06-12 | 江苏安捷汽车配件有限公司 | Braking device using Rb-Fe-B magnet |
| CN102582445A (en) * | 2012-04-10 | 2012-07-18 | 上海中科深江电动车辆有限公司 | Electromagnetic mechanism for parking electric drive automobile |
| CN105114486A (en) * | 2015-07-30 | 2015-12-02 | 南京纳帝机电技术有限公司 | Electromagnetic neck-type brake |
| CN105114486B (en) * | 2015-07-30 | 2017-07-28 | 南京纳帝机电技术有限公司 | Electromagnetism card slot type brake |
| CN107498084A (en) * | 2017-10-23 | 2017-12-22 | 浙江昊光电子科技有限公司 | The cleaning and catch component that a kind of lighting apparatus makes |
| CN107498084B (en) * | 2017-10-23 | 2024-04-30 | 南京栖霞科技产业发展有限公司 | Cleaning and capturing component for manufacturing lighting equipment |
| CN118473130A (en) * | 2024-07-09 | 2024-08-09 | 台邦电机工业集团有限公司 | Low-power electromagnetic braking motor device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |