CN201639427U - Power-off brake for alternating current servomotor - Google Patents
Power-off brake for alternating current servomotor Download PDFInfo
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- CN201639427U CN201639427U CN2010202840504U CN201020284050U CN201639427U CN 201639427 U CN201639427 U CN 201639427U CN 2010202840504 U CN2010202840504 U CN 2010202840504U CN 201020284050 U CN201020284050 U CN 201020284050U CN 201639427 U CN201639427 U CN 201639427U
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- wheel disc
- servo motor
- teeth wheel
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Abstract
The utility model relates to a power-off brake for an alternating current servomotor, which comprises a main body, an internal friction gear plate and an external gear, wherein a coil is embedded in the main body; the outer side of the coil is provided with a brake spring; the external gear is arranged in the cavity at the front end of the main body; a motor rear bearing is arranged in the cavity at the back end; the outer side of the motor rear bearing is provided with a shaft check ring; teeth of the external gear are meshed with the internal friction gear plate; the internal friction gear plate and the external gear are respectively a micron gear; both sides of the internal friction gear plate are provided with a locating plate and a fixed plate; the back end of the main body is provided with a lug boss; the lead-out line of the coil extends to the external of the lug boss; and the lug boss and the bearing retainer of the motor rear bearing are processed in one procedure. The utility model has the advantages of small size, favorable location capability for power failure, high reliability and low noise.
Description
Technical field
The utility model relates to a kind of electricity loss brake, relates in particular to the electricity loss brake that a kind of AC servo motor is used, and specifically is applicable to the location after the small-sized AC servo motor dead electricity.
Background technology
The matching used electricity loss brake of small-sized AC servo motor, cube is little, braking moment is big because of wanting, reliability requirement is high, is the difficult point of design always.The product that existing domestic and international electricity loss brake supplier is provided, it is a kind of universal product, for example world-famous brake supplier German Lenze company, the electricity loss brake product that they provide, one side price comparison costliness, the big No of its small product size has the standard that reaches small size on the other hand, except above-mentioned requirements, in a lot of application scenarios, for example application such as industrial robot also requires under power failure state, the rotor of motor must stop at dead electricity residing position when beginning, be not subjected to the external force of parts or the influence of action of gravity, that is to say when losing power supply suddenly the position the when rotor of motor must stop at program interrupt in system, so that can continue to carry out corresponding program after the energising, thereby guarantee the continuity of processing and the precision of product.
The Chinese patent Granted publication number is CN2115424U, Granted publication day is that the utility model patent on September 9th, 1992 discloses a kind of AC servo motor electricity loss brake, this electricity loss brake is made up of flange, yoke, armature, coil, fixed friction plate, the armature kink is on flange, be provided with the compression spring sheet between armature and fixed friction plate, compression spring sheet two sides are provided with friction plate, and the compression spring sheet is fixed on the boss of flange, on yoke, have the hole, be embedded spring in the hole.Though the structure of this utility model is comparatively simple, retro-speed is fast steadily, do not have unloaded moment, but its volume is bigger, can't satisfy the instructions for use that volume is little, braking moment is big, reliability requirement is high simultaneously, and the friction means of its use not only frictional force less, influence the dead electricity stationkeeping ability, and noise is bigger, contaminated environment.
Summary of the invention
The purpose of this utility model is to overcome defective and the problem that the volume that exists in the prior art is big, the dead electricity stationkeeping ability is relatively poor, noise is bigger, the electricity loss brake that provides a kind of volume is less, the dead electricity stationkeeping ability is better, noise is less AC servo motor to use.
For realizing above purpose, technical solution of the present utility model is: the electricity loss brake that a kind of AC servo motor is used, comprise main body, tripping spring, interior friction teeth wheel disc and external gear, the inside of described main body is embedded with the coil of hollow cylinder body structure, the position that is positioned at the coil outside on the main body is provided with tripping spring, be provided with coaxial external gear in the front end chamber of main body, the tooth portion of external gear is meshed with interior friction teeth wheel disc, the both sides of interior friction teeth wheel disc are provided with location-plate and fixed head, fixed head is provided with the positioning sleeve with its matched in clearance, and the inside of positioning sleeve is run through to be provided with and is used for fixing main body, the guider screw of positioning sleeve and fixed head;
Be provided with coaxial motor rear bearing in the chamber, rear end of described main body, the manufactured materials of main body is a permeability magnetic material, and the manufactured materials of fixed head is a magnetic material, and the manufactured materials of interior friction teeth wheel disc is a non-magnet material.
The arranged outside of described motor rear bearing has the axle ring washer, and axle is arranged in the chamber, rear end of main body with ring washer, and coaxial with the chamber, rear end of main body.
The rear end of described main body is a boss, and the inside of boss is provided with the lead-out wire of coil, and this lead-out wire extends to the outside of boss.
The bearing guard of described boss and motor rear bearing processes in one procedure.
Friction teeth wheel disc and external gear are fine module gear in described.
The two sides of friction teeth wheel disc are provided with the coating face of being made by copper powder and heatproof glue in described.
The quantity of the tripping spring that is provided with on the described main body is at least two, and evenly is provided with along same circumference.
Described coil is formed by the coiling of high-strength polyester enamel insulated round copper wire.
Compared with prior art, the beneficial effects of the utility model are:
1, owing in the chamber, rear end of main body, be provided with coaxial motor rear bearing in the electricity loss brake that a kind of AC servo motor of the utility model is used, this design can obviously reduce the axial length of motor when mounted, and be a boss structure with the back end design of main body, the inside of boss is provided with the lead-out wire of coil, and lead-out wire extends to the outside of boss, the structural design of this kind lead-out wire also can reduce the axial length of motor, aforementioned two designs have reduced the volume of electricity loss brake, simultaneously, in order to guarantee carrying out smoothly of the built-in this design of motor rear bearing, the stator of motor, the concentricity requirement of rotor must improve thereupon, the utility model has reached the stator of motor by this technology of bearing guard of processing boss and motor rear bearing in one procedure simultaneously, the concentricity requirement of rotor, thereby guaranteed the smooth realization of the built-in design of motor rear bearing, in addition, the utility model is in the coefficient of safety that all leaves in the design of circuit and magnetic circuit more than two times, thereby guaranteed the device reliability of operation.Therefore not only volume is less for the utility model, and the concentricity of stator, rotor is higher, and reliability is higher.
2, since in the electricity loss brake used of a kind of AC servo motor of the utility model when coil electricity, electric current produces magnetic flux by coil, magnetic flux forms the loop along inside, bottom and outside and the fixed head of main body, thereby electromagnetic force is resisted on the spring force plane that is attached to main body tightly of tripping spring fixed head, at this moment, interior friction teeth wheel disc rotates with external gear; When coil losing electricity, magnetic flux disappears, the bounce of tripping spring makes fixed head prop up interior friction teeth wheel disc and location-plate, the interior friction teeth wheel disc that is fixed stops the external gear rotation, because the two sides of the interior friction teeth wheel disc that is adopted in the utility model are provided with the coating face of being made by copper powder and heatproof glue, coefficient of friction is very big, can produce bigger frictional force, can satisfy the needs that stop the external gear rotation fully, and owing to the quantity of tripping spring in the utility model is at least two, and evenly be provided with along same circumference, thereby can produce very big springback power simultaneously, thus strengthen frictional force, effectively avoid the influence of external force on the part or gravity, produce dead electricity stationkeeping ability preferably, and then guarantee the continuity of processing and the precision of product.Therefore dead electricity stationkeeping ability of the present utility model is better, helps guaranteeing the continuity of processing and the precision of product.
3, because interior friction teeth wheel disc and external gear in the electricity loss brake that a kind of AC servo motor of the utility model is used are fine module gear, this kind design can guarantee to obtain bigger flank engagement value under the less situation of gear, thereby higher perpendicularity between friction teeth wheel disc and the external gear in realizing, and then in reducing during friction teeth wheel disc high speed rotating and the noise that produces between the location-plate, fixed head.Therefore noise of the present utility model is less.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Among the figure: main body 1, front end chamber 11, chamber, rear end 12, tripping spring 2, interior friction teeth wheel disc 3, external gear 4, coil 5, lead-out wire 51, boss 6, location-plate 7, fixed head 8, positioning sleeve 9, guider screw 10, motor rear bearing 13, axle ring washer 14.
Embodiment
Below in conjunction with description of drawings and embodiment the utility model is described in further detail.
Referring to Fig. 1, the electricity loss brake that a kind of AC servo motor is used, comprise main body 1, tripping spring 2, interior friction teeth wheel disc 3 and external gear 4, the inside of described main body 1 is embedded with the coil 5 of hollow cylinder body structure, the position that is positioned at coil 5 outsides on the main body 1 is provided with tripping spring 2, be provided with coaxial external gear 4 in the front end chamber 11 of main body 1, the tooth portion of external gear 4 is meshed with interior friction teeth wheel disc 3, the both sides of interior friction teeth wheel disc 3 are provided with location-plate 7 and fixed head 8, fixed head 8 is provided with the positioning sleeve 9 with its matched in clearance, and the inside of positioning sleeve 9 is run through to be provided with and is used for fixing main body 1, the guider screw 10 of positioning sleeve 9 and fixed head 8;
Be provided with coaxial motor rear bearing 13 in the chamber, rear end 12 of described main body 1, the manufactured materials of main body 1 is a permeability magnetic material, and the manufactured materials of fixed head 8 is a magnetic material, and the manufactured materials of interior friction teeth wheel disc 3 is a non-magnet material.
The arranged outside of described motor rear bearing 13 has axle ring washer 14, and axle is arranged in the chamber, rear end 12 of main body 1 with ring washer 14, and coaxial with the chamber, rear end 12 of main body 1.
The rear end of described main body 1 is a boss 6, and the inside of boss 6 is provided with the lead-out wire 51 of coil 5, and this lead-out wire 51 extends to the outside of boss 6.
Described boss 6 processes in one procedure with the bearing guard of motor rear bearing 13.
Friction teeth wheel disc 3 is fine module gear with external gear 4 in described.
The two sides of friction teeth wheel disc 3 are provided with the coating face of being made by copper powder and heatproof glue in described.
The quantity of the tripping spring 2 that is provided with on the described main body 1 is at least two, and evenly is provided with along same circumference.
Described coil 5 is formed by the coiling of high-strength polyester enamel insulated round copper wire.
Principle of the present utility model is described as follows:
The matching used electricity loss brake of small-sized AC servo motor, because of wanting cube little, braking moment is big, the reliability requirement height, it is the unit of the capable design of the difficult point Dui Yu No brake of design always, perhaps for the brake use amount unit seldom of this specification, generally can only Bian with the brake of common-use size, but has very big use difficulty like this, because the external form of small-sized servomotor is less, in order to guarantee structural requirement, what then must cause increasing comparatively speaking on the axial length of rotor is more, servomotor for low capacity, because the axle of motor is less, the stiffness of axle lengthening rear axle is difficult to guarantee, causes that easily electric machine rotor wipes mutually and break down.Therefore for the low capacity servomotor,, can also have rotor stiffness preferably, just should measure the axial length of the few motor of Minus to the greatest extent for after mixing electricity loss brake.In order to reach this purpose, the utility model Bian is with the design that the rear bearing of motor is placed in electricity loss brake inside.Bian with such design after, can reduce the axial length of motor greatly.In addition, the utility model also with the lead-out wire of coil on the brake to the brake back, promptly draw the rear end of main body, this also can reduce the axial length of motor.
In order to realize above-mentioned design, just must guarantee the concentricity requirement between the electric machine rotor.Therefore processing technology just there is corresponding requirement, this shows to brake with to the processing request of back end cover for motor, wherein the processing request to brake comprises: the processing of the boss that matches with the back end cover for motor seam on the processing of the bearing guard of installation rear bearing, the brake on the brake must be finished simultaneously under once-through operation and just can avoid because of the operation change makes the motor that produces Come have the inconsistent defective of stator and rotor cores concentricity, thereby guarantees to have higher concentricity between the motor stator and rotor.The error range of the processing dimension that can influence electric machine rotor concentricity problem that relates in the course of processing in addition, all must be abideed by the GB requirement.
During use, when coil 5 energisings, electric current produces magnetic flux by coil 5, magnetic flux forms the loop along inside, bottom and outside and the fixed head 8 of main body 1, simultaneously, the electromagnetic force that produces makes fixed head 8 can resist the spring force of tripping spring 2 and tightly be attached on the left end plane of main body 1, at this moment, just exist certain clearance between fixed head 8 and the interior friction teeth wheel disc 3, also exist certain clearance between location-plate 7 and the interior friction teeth wheel disc 3, when rotor need rotate, interior friction teeth wheel disc 3 just can be along with the external gear on the axle 4 freely rotates.
When coil 5 dead electricity, magnetic flux disappears, friction teeth wheel disc 3 and location-plate 7 in fixed head 8 tightly props up under the bounce effect of tripping spring 2, interior friction teeth wheel disc 3 is clipped between location-plate 7 and the fixed head 8, its two sides produce bigger frictional force simultaneously, the frictional force that produces makes intermeshing interior friction teeth wheel disc 3, external gear 4 stop simultaneously, thereby has realized the effect of dead electricity location.
Power failure state no matter in the utility model, still "on" position tripping spring 2 all is in preloading condition, because the distance that fixed head 8 moved when brake was opened is very little, the time of therefore finishing braking response during dead electricity is just very short, approximately have only tens milliseconds, thereby residing position when guaranteeing that rotor stops at dead electricity and begins, and because the effect of frictional force, this position is not subjected to the influence of gravity or external force effect yet.Simultaneously, because when brake is opened, location-plate 7, interior friction teeth wheel disc 3, distance between fixed head 8 threes is all very little, for friction teeth wheel disc 3 in reducing when the high speed rotating and location-plate 7, the noise that produces because of contact between the fixed head 8, perpendicularity in requiring between the axis of friction teeth wheel disc 3 and epitrochanterian external gear 4 is high more good more, and for small-sized brake, because external gear 4 is less, therefore have only the close-toothed gear of employing that bigger flank engagement value is just arranged, thereby in realizing friction teeth wheel disc 3 and external gear 4 between the two than high verticality, and then reduce the additional noise that produces by brake.
Therefore the utility model not only small volume, dead electricity stationkeeping ability is better, and reliability is higher, noise is littler.
Claims (8)
1. electricity loss brake that AC servo motor is used, comprise main body (1), tripping spring (2), interior friction teeth wheel disc (3) and external gear (4), the inside of described main body (1) is embedded with the coil (5) of hollow cylinder body structure, the position that is positioned at coil (5) outside on the main body (1) is provided with tripping spring (2), be provided with coaxial external gear (4) in the front end chamber (11) of main body (1), the tooth portion of external gear (4) is meshed with interior friction teeth wheel disc (3), the both sides of interior friction teeth wheel disc (3) are provided with location-plate (7) and fixed head (8), fixed head (8) is provided with the positioning sleeve (9) with its matched in clearance, the inside of positioning sleeve (9) is run through to be provided with and is used for fixing main body (1), the guider screw (10) of positioning sleeve (9) and fixed head (8) is characterized in that:
Be provided with coaxial motor rear bearing (13) in the chamber, rear end (12) of described main body (1), the manufactured materials of main body (1) is a permeability magnetic material, the manufactured materials of fixed head (8) is a magnetic material, and the manufactured materials of interior friction teeth wheel disc (3) is a non-magnet material.
2. the electricity loss brake that a kind of AC servo motor according to claim 1 is used, it is characterized in that: the arranged outside of described motor rear bearing (13) has axle ring washer (14), axle is arranged in the chamber, rear end (12) of main body (1) with ring washer (14), and coaxial with the chamber, rear end (12) of main body (1).
3. the electricity loss brake that a kind of AC servo motor according to claim 1 and 2 is used, it is characterized in that: the rear end of described main body (1) is a boss (6), the inside of boss (6) is provided with the lead-out wire (51) of coil (5), and this lead-out wire (51) extends to the outside of boss (6).
4. the electricity loss brake that a kind of AC servo motor according to claim 3 is used is characterized in that: described boss (6) processes in one procedure with the bearing guard of motor rear bearing (13).
5. the electricity loss brake that a kind of AC servo motor according to claim 1 and 2 is used is characterized in that: friction teeth wheel disc (3) is fine module gear with external gear (4) in described.
6. the electricity loss brake that a kind of AC servo motor according to claim 5 is used is characterized in that: the two sides of friction teeth wheel disc (3) are provided with the coating face of being made by copper powder and heatproof glue in described.
7. the electricity loss brake that a kind of AC servo motor according to claim 1 and 2 is used is characterized in that: the quantity that described main body (1) goes up the tripping spring (2) that is provided with is at least two, and evenly is provided with along same circumference.
8. the electricity loss brake that a kind of AC servo motor according to claim 1 and 2 is used is characterized in that: described coil (5) is formed by the coiling of high-strength polyester enamel insulated round copper wire.
Key in claim item 1 herein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202840504U CN201639427U (en) | 2010-08-06 | 2010-08-06 | Power-off brake for alternating current servomotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202840504U CN201639427U (en) | 2010-08-06 | 2010-08-06 | Power-off brake for alternating current servomotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201639427U true CN201639427U (en) | 2010-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202840504U Expired - Lifetime CN201639427U (en) | 2010-08-06 | 2010-08-06 | Power-off brake for alternating current servomotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201639427U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103358317A (en) * | 2013-07-29 | 2013-10-23 | 林佳杰 | Robot joint with power-off protection function and adjustable rigidity |
| CN104319937A (en) * | 2014-10-20 | 2015-01-28 | 无锡欧瑞京机电有限公司 | Anti-reversal device of vertical motor |
| CN109278067A (en) * | 2018-11-30 | 2019-01-29 | 上海宇塚电子科技有限公司 | Disc type brake device structure in joint of robot mould group |
-
2010
- 2010-08-06 CN CN2010202840504U patent/CN201639427U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103358317A (en) * | 2013-07-29 | 2013-10-23 | 林佳杰 | Robot joint with power-off protection function and adjustable rigidity |
| CN103358317B (en) * | 2013-07-29 | 2015-12-23 | 林佳杰 | A kind of have power-off protection function and the adjustable joint of robot of rigidity |
| CN104319937A (en) * | 2014-10-20 | 2015-01-28 | 无锡欧瑞京机电有限公司 | Anti-reversal device of vertical motor |
| CN104319937B (en) * | 2014-10-20 | 2018-02-27 | 无锡欧瑞京机电有限公司 | Vertical machine anti-reverse-rotation device |
| CN109278067A (en) * | 2018-11-30 | 2019-01-29 | 上海宇塚电子科技有限公司 | Disc type brake device structure in joint of robot mould group |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101117 |
|
| CX01 | Expiry of patent term |