CN203504383U - Internal contracting brake device of linear motor - Google Patents
Internal contracting brake device of linear motor Download PDFInfo
- Publication number
- CN203504383U CN203504383U CN201320596839.7U CN201320596839U CN203504383U CN 203504383 U CN203504383 U CN 203504383U CN 201320596839 U CN201320596839 U CN 201320596839U CN 203504383 U CN203504383 U CN 203504383U
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- linear motor
- fixed core
- iron core
- moving iron
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Abstract
The utility model relates to an internal contracting brake device of a linear motor. The internal contracting brake device of the linear motor is characterized in that the internal contracting brake device is integrally fixed on a linear motor housing and comprises an annular static iron core, moving iron cores and a plurality of reset springs, wherein the annular static iron core is arranged on a linear motor mover shaft in a sleeved manner and provided with a coil on the inner ring; the moving iron cores are arranged between the inner ring of the static iron core and the linear motor mover shaft; and the reset springs are matched with the moving iron cores in number, the reset springs are installed in the static iron core, and the inner ends of the reset springs are connected with the moving iron cores so as to press the moving iron cores towards the linear motor mover shaft. The internal contracting brake device of the linear motor has the advantages that when the coil of the internal contracting brake device is under the power-on state, the moving iron cores overcome the deformation forces of the reset springs by the electromagnetic effect so as to be attracted together with the static iron core, so that the linear motor is under a non-internal contracting brake state; and when the coil of the internal contracting brake device is under the power-off state, by means of autofrettage pressure of the reset springs, the static friction forces generated between the moving iron cores and the linear motor mover shaft are large enough, so that the purpose of internal contracting brake of the linear motor is achieved.
Description
Technical field
The utility model relates to a kind of band brake apparatus, particularly a kind of linear electric motors band brake apparatus.
Background technology
Electric Drive is by the working method of the direct driving arrangement execution of drive system with motor, Electric Drive reliable in action and there is fault-tolerant ability, though compare electrical power with hydraulic system, increase, but caloric value is little, component wear is little, thereby the reliability of system is improved.Especially, a lot of manufacturing machines or special equipment need bi-directional drive and have the rectilinear motion occasion of certain thrust, as the unlatching of the feeding of Digit Control Machine Tool, aircraft door, high-voltage switch gear deciliter, the switching of electrically operated valve etc. can adopt linear actuator.At present, linear actuator often adopts the transmission mechanism of turning motor and turbine and worm and feed screw nut, yet, adopt the linear actuator of " electric rotating machine+leading screw " kind of drive, owing to being subject to the restriction of self structure, at aspects such as point-to-point speed, acceleration, quick positioning precisioies, be difficult to breakthrough raising.In recent years, along with the development of permanent magnetic material technology and electric machines control technology, there is a kind of brand-new kind of drive---linear motor direct drive mode.Electric rotating machine is radially cut open and generate plane is linear electric motors, by stator develop and come for elementary, by rotor develop and come for secondary.Linear electric motors are the transmission devices without any need for intermediate conversion mechanism.Because driving system of linear motor has been cancelled intermediate mechanical transmission link, mechanical friction and running noises have significantly been reduced, eliminated backlass, strain and the movement inertia of system greatly reduce, whole closed-loop control system dynamic response performance and positioning precision are improved greatly, and translational velocity is fast, acceleration-deceleration is large.As far back as the forties in 19th century, just there is the blank of line inductance electromotor, to the nineties in 20th century, development along with correlation techniques such as rare earth permanent-magnetic material, control technology, computer technologies, formerly system is made, track traffic, military affairs etc. be under the strong promotion of high-speed, high accuracy Linear transmission functional part demand, and techniques of linear motor and application study thereof are developed rapidly.
In a lot of commercial Application, mechanical system has position locking requirement to linear actuator, for example, after high-voltage switch gear need to complete combined floodgate or separating brake, holding position state is not changed by external force, Digit Control Machine Tool feeding tool arrives the counter-force of wanting to bear after given position in gravity and the course of processing and unlikely change position, for electric rotating machine+lead screw transmission mode, position keeps object to provide static friction torque limiting motor to rotate to realize by band brake apparatus, this band brake apparatus comparative maturity for electric rotating machine exploitation.The linear electric motors position locking object of straight line start is the movement along start direction of straight limit motor, needs linear electric motors band brake apparatus that enough stiction is provided for this reason, effectively plant equipment is locked in to service position.Therefore research and develop a kind of rationally reliable linear electric motors band brake apparatus imperative.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of band brake apparatus easy, that reliability is high, flexibility ratio is large of controlling.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of linear electric motors band brake apparatus, and its innovative point is: described band brake apparatus integral body is fixed on linear electric motors housing, and it comprises a fixed core, this fixed core is an annular magnetizer, the inner ring place damascene wiring of fixed core; Fixed core is sleeved on outside linear motor rotor axle, the axis of fixed core and the dead in line of linear motor rotor axle, and leave gap between fixed core and linear motor rotor axle; The upper and lower surface of described fixed core is connected with upper end cover and bottom end cover by sunk screw; At least one is moving unshakable in one's determination, this moving iron core is the fan-shaped magnetic conductor that a inner has interior circular arc, be arranged between the inner ring and linear motor rotor axle of fixed core, moving iron core is less than described gap in fixed core size radially, and the inner surface of moving iron core and upper and lower end cap is slidably matched; Some and moving quantity unshakable in one's determination is to the back-moving spring mating, and described back-moving spring is arranged in fixed core, and back-moving spring is inner to be connected and will to move iron core with each moving iron core and press to linear motor rotor axle; At coil power failure state, described moving iron core is by back-moving spring clamping motor mover axle; In coil "on" position, described moving iron core overcomes back-moving spring deformation power and fixed core adhesive by galvanomagnetic effect.
Further, described upper end cover or bottom end cover, with the moving surface contacting unshakable in one's determination, the guide groove radially extending along fixed core being set, have the guiding rib structure of mating with described guide groove on moving iron core.
Further, described moving iron core has at least two or more, and moving iron core be take fixed core axis as the center of circle, and circular array distributes; The long axis fixed core of back-moving spring radially arranges.
Further, the inside and outside circular arc decentraction of described moving iron core, wherein, the diameter of moving unshakable in one's determination interior circular arc equates with linear motor rotor shaft diameter, the diameter of external arc equates with the internal diameter of fixed core.
Further, described fixed core has some through holes that radially extend, and back-moving spring is placed in each through hole, the outer end of the through hole adjustment screw that is threaded.
The utility model has the advantage of: coil of the present invention is under "on" position, and moving iron core overcomes back-moving spring deformation power and fixed core adhesive by galvanomagnetic effect, makes linear electric motors in non-band-type brake state.And coil is under non-power status, the preload pressure by back-moving spring makes enough large stiction of unshakable in one's determination and linear motor rotor axle generation, thereby reaches the object of linear electric motors band-type brake.And then guarantee still can guarantee that band brake apparatus produces band-type brake power in emergency system dead electricity situation, thereby prevent the generation of security incident.
The present invention adopts the moving iron core of a plurality of segmentation combinations, and circular array distributes, the pressure direction that back-moving spring produces is substantially consistent with the moving direction of motion unshakable in one's determination, under coil power failure state, make moving iron core can evenly be pressed on linear motor rotor axle surface, keep enough and uniform band-type brake static friction.
Moving inside and outside circular arc decentraction unshakable in one's determination, the diameter of interior circular arc equates with linear motor rotor shaft diameter, moving unshakable in one's determination maximum with linear motor rotor axle contact area maximum and static friction while guaranteeing band-type brake, the diameter of external arc equates with the internal diameter of fixed core, after guaranteeing coil electricity, moving iron core contacts with fixed core well, and magnetic circuit reluctance is minimum.
Corresponding a plurality of back-moving springs and the adjustment screw of placing on fixed core, regulates the pressure of back-moving spring by adjustment screw, the large stiction of combination results very neatly, and then the static confining force of band brake apparatus while changing actual use; Before assembling, adjustment screw can be screwed out, make the moving iron core of band brake apparatus and linear motor rotor between centers there is no static friction, facilitate the install and adjust of band brake apparatus; In case of emergency, also can screw out adjustment screw retracting spring, make band brake apparatus emergency release; By adjustment screw, adjust spring pressure.
Accompanying drawing explanation
Fig. 1 is cathetus motor internal contracting brake apparatus structure schematic diagram of the present invention.
Fig. 2 is that cathetus motor internal contracting brake device of the present invention is removed the vertical view after upper end cover.
Fig. 3 is the partial top view of single moving iron core in the present invention.
Fig. 4 is the principle schematic of fixed core, winding and moving iron core combination.
Embodiment
Embodiment
Refer to Fig. 1, the present invention has disclosed a kind of linear electric motors band brake apparatus, and this band brake apparatus integral body is fixed on linear electric motors housing.It comprises upper end cover 1, fixed core 2, bottom end cover 3, moving iron core 4, coil 5, adjusting nut 6, back-moving spring 7, bolt 8, linear motor rotor axle 9, sunk screw 10.
Fixed core 2 is an annular magnetizer, the inner ring place damascene wiring 5 of fixed core 2; Fixed core 2 is sleeved on outside linear motor rotor axle 9, the axis of fixed core 2 and 9 deads in line of linear motor rotor axle, and leave gap between fixed core 2 and linear motor rotor axle 9.
The upper and lower surface of fixed core 2 is connected with upper end cover 1 and bottom end cover 3 by sunk screw 10 respectively, and band brake apparatus integral body is fixed on linear electric motors housing 1 by the bolt 8 through upper end cover 1 and bottom end cover 3.
Moving unshakable in one's determination 4 at least one, this moving iron core 4 is the fan-shaped magnetic conductor that a inner has interior circular arc, be arranged between the inner ring and linear motor rotor axle 9 of fixed core 2, moving unshakable in one's determination 4 are less than above-mentioned gap in fixed core 2 size radially, make moving unshakable in one's determination 4 to contact with in fixed core 2 or linear motor rotor axle 9 one in being merely able at one time.
Moving unshakable in one's determination 4 are slidably matched with the inner surface of upper and lower end cap; Upper end cover or bottom end cover, with the moving surface contacting unshakable in one's determination, guide groove or the guiding rib radially extending along fixed core being set, have guiding rib or the guide barrel construction mating with described guide groove or guiding rib on moving iron core.
As the present invention's execution mode more specifically, moving unshakable in one's determination 4 have four, and moving unshakable in one's determination 4 to take fixed core 2 axis be the center of circle, and circular array distributes.Moving unshakable in one's determination 4 inside and outside circular arc decentraction, wherein, diameter and linear motor rotor axle 9 equal diameters of moving unshakable in one's determination 4 interior circular arc, the diameter of external arc equates with the internal diameter of fixed core 2.
The quantity of back-moving spring 7 is with moving unshakable in one's determination 4 to mating, and the long axis fixed core of back-moving spring 7 radially arranges, and in fixed core 2, and back-moving spring 7 is inner moving unshakable in one's determination 4 to be connected and will to move iron core 4 and press to linear motor rotor axle 9 with each.In the present embodiment, each moving unshakable in one's determination 4 is equipped with upper and lower two-layer back-moving spring 7, uniform three of every layer of back-moving spring 7.
At coil 5 power failure states, moving unshakable in one's determination 4 by back-moving spring 7 clamping motor mover axles 9; In coil 5 "on" positions, moving unshakable in one's determination 4 overcome back-moving spring deformation power and fixed core adhesive by galvanomagnetic effect.
For convenience of the thrust that regulates moving 4 clamping motor mover axles 9 unshakable in one's determination, fixed core 2 has some through holes that radially extend, and 7 of back-moving springs are placed in each through hole, the outer end of the through hole adjustment screw 10 that is threaded.
Operation principle:
Coil losing electricity state:
Under the guide groove guiding rib effect of each moving 4 deformation power effects at back-moving spring 7 unshakable in one's determination and upper and lower end lid, along moving radially of fixed core 2, prop up and clamping motor mover axle 9; Make to maintain static friction between iron core 4 and linear motor rotor axle 9, this static friction can be adjusted by adjustment screw 10; And then realize the band-type brake of electric mover axle 9;
Coil obtains electricity condition:
As seen from Figure 4, the compound mode of fixed core 2 of the present invention, moving iron core 4 and coil 5, when passing into galvanic direction for the coil 5 of loop configuration for flowing out paper direction I, the magnetic flux producing
path linkage moving unshakable in one's determination 4 and fixed core 2, according to principle of electromechanical energy conversion, on moving unshakable in one's determination 4, obtain a radial electromagnetic force F who points to fixed core 2, this radial electromagnetic force F overcomes the static compression force of back-moving spring 7 as enough senior generals, iron core 4 and linear motor rotor axle 9 are disengaged, then contact with fixed core 2, now linear electric motors are in normal operating conditions.
The present invention is not limited to above-described embodiment; on the basis of technical scheme disclosed by the invention; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in protection scope of the present invention.In addition, the band brake apparatus in the present invention is also not only confined to the band-type brake of linear electric motors, equally applicable to other similar axle class band-type brakes.
Claims (5)
1. a linear electric motors band brake apparatus, is characterized in that: described band brake apparatus integral body is fixed on linear electric motors housing, and it comprises
One fixed core, this fixed core is an annular magnetizer, the inner ring place damascene wiring of fixed core; Fixed core is sleeved on outside linear motor rotor axle, the axis of fixed core and the dead in line of linear motor rotor axle, and leave gap between fixed core and linear motor rotor axle; The upper and lower surface of described fixed core is connected with upper end cover and bottom end cover by sunk screw;
At least one is moving unshakable in one's determination, this moving iron core is the fan-shaped magnetic conductor that a inner has interior circular arc, be arranged between the inner ring and linear motor rotor axle of fixed core, moving iron core is less than described gap in fixed core size radially, and the inner surface of moving iron core and upper and lower end cap is slidably matched;
Some and moving quantity unshakable in one's determination is to the back-moving spring mating, and described back-moving spring is arranged in fixed core, and back-moving spring is inner to be connected and will to move iron core with each moving iron core and press to linear motor rotor axle;
At coil power failure state, described moving iron core is by back-moving spring clamping motor mover axle;
In coil "on" position, described moving iron core overcomes back-moving spring deformation power and fixed core adhesive by galvanomagnetic effect.
2. linear electric motors band brake apparatus according to claim 1, is characterized in that: described upper end cover or bottom end cover, with the moving surface contacting unshakable in one's determination, the guide groove radially extending along fixed core being set, have the guiding rib structure of mating with described guide groove on moving iron core.
3. linear electric motors band brake apparatus according to claim 1, is characterized in that: described moving iron core has at least two or more, and moving iron core be take fixed core axis as the center of circle, and circular array distributes; The long axis fixed core of back-moving spring radially arranges.
4. according to the linear electric motors band brake apparatus described in claim 1,2 or 3, it is characterized in that: the inside and outside circular arc decentraction of described moving iron core, wherein, the diameter of moving unshakable in one's determination interior circular arc equates with linear motor rotor shaft diameter, and the diameter of external arc equates with the internal diameter of fixed core.
5. linear electric motors band brake apparatus according to claim 1, is characterized in that: described fixed core has some through holes that radially extend, and back-moving spring is placed in each through hole, the outer end of the through hole adjustment screw that is threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320596839.7U CN203504383U (en) | 2013-09-26 | 2013-09-26 | Internal contracting brake device of linear motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320596839.7U CN203504383U (en) | 2013-09-26 | 2013-09-26 | Internal contracting brake device of linear motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203504383U true CN203504383U (en) | 2014-03-26 |
Family
ID=50335327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320596839.7U Withdrawn - After Issue CN203504383U (en) | 2013-09-26 | 2013-09-26 | Internal contracting brake device of linear motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203504383U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490584A (en) * | 2013-09-26 | 2014-01-01 | 东南大学 | Brake device of linear motor |
-
2013
- 2013-09-26 CN CN201320596839.7U patent/CN203504383U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490584A (en) * | 2013-09-26 | 2014-01-01 | 东南大学 | Brake device of linear motor |
| CN103490584B (en) * | 2013-09-26 | 2015-11-18 | 东南大学 | A kind of brake device of linear motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140326 Effective date of abandoning: 20151118 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140326 Effective date of abandoning: 20151118 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |