CN100343547C - Internal expanding type electromagnetic brake - Google Patents
Internal expanding type electromagnetic brake Download PDFInfo
- Publication number
- CN100343547C CN100343547C CNB2004100935424A CN200410093542A CN100343547C CN 100343547 C CN100343547 C CN 100343547C CN B2004100935424 A CNB2004100935424 A CN B2004100935424A CN 200410093542 A CN200410093542 A CN 200410093542A CN 100343547 C CN100343547 C CN 100343547C
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- Prior art keywords
- main shaft
- mobile armature
- internal expanding
- brake
- iron core
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Abstract
The present invention discloses an internal expanding type electromagnetic brake. The whole brake internally embedded in a brake drum can be symmetrically arranged relative to the axial line of the brake drum. A fixed iron core of the brake is provided with a main shaft which penetrates through a movable armature and extends into a brake shoe, and the main shaft is used for bearing a torque moment generated by a braking friction force. The present invention having the advantages of compact and simple structure and relatively small space occupation is suitable for permanent magnet synchronous gearless traction machines.
Description
Technical field
The present invention relates to a kind of internal expanding electromagnetic braker that is used for permanent-magnet synchnorous gearless dragging machine.
Background technique
Original electromagnetic brake, great majority are disc type and drum brake.The main braking surface of disk type braker is two sides of brake disc, and drum brake braking and be the outer peripheral surface of brake drum.The break of these two kinds of structures is particularly axially often needing very big space radially.Therefore, in designed space, can not accomplish miniaturization.And brakeage sound is bigger, complex structure, and assembly and adjustment also has difficulties.If it is in limited space, obtain required electromagnetic force, often very difficult.
Internal expanding electromagnetic braker can solve the deficiency of disc type and drum brake existence, and whole break is arranged in brake drum inside, has advantages such as simple in structure and compact, that motion and sound is little, fine setting is easy.At present, internal expanding electromagnetic braker more existing application on permanent-magnet synchnorous gearless dragging machine.Disclose a kind of internal expanding electromagnetic braker as Japanese patent specification JP P2001-39072, this electromagnetic brake comes the clamping brake block from two keeping arms of top and the bottom evagination of fixed iron core, to overcome the drag friction power that produces when brake block is braked.Because the drag friction power of brake strip produces bigger additional moments to two keeping arms of brake shoe, so two keeping arms of brake shoe must keep enough rigidity and intensity, make two keeping arms still need occupy bigger space relatively.And the comparatively difficulty that manually declutches of this electromagnetic brake often needs the power supply that declutches that adds.The disclosed another kind of internal expanding electromagnetic braker of Japanese patent specification JPP2002-104101, the position is provided with the axis of guide and two brake springs of two brake arms about the break fixed iron core.Spring force is positioned at the two ends up and down of brake arm, spring force produces bigger moment of flexure to brake arm, the power of drag friction simultaneously also produces bigger moment of flexure to two axis of guides of brake arm, therefore the physical dimension of brake arm is also relatively large, occupy the inner useful space of bigger braking surface, and the axis of guide weares and teares easily.Because the axis of guide of brake arm is bigger from the centre distance of break, therefore when break is braking state, the different rotation trend of braking surface will cause the air gap up and down between mobile armature and the fixed iron core to change greatly, and the electromagnetic attraction to break produces bigger influence like this.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of internal expanding electromagnetic braker, and its structure is compact more, simple, and occupied space is less relatively.
For solving the problems of the technologies described above, internal expanding electromagnetic braker of the present invention, comprise fixed iron core, mobile armature, coil, brake block, friction plate, pressure spring, whole break is embedded in the brake drum, with respect to brake drum axis symmetric arrangement, in described fixed iron core neutral position one main shaft is set, this main shaft passes mobile armature and extends in the brake block and is connected with brake block, and described brake block can move on main shaft.
Adopt after the said structure, internal expanding electromagnetic braker of the present invention, one main shaft is arranged on the inside of fixed iron core, mobile armature and brake block, and the torque that drag friction power that brake block bore produces is delivered on fixed iron core and the fitting surface that main shaft cooperates by this main shaft.Because keeping arm or brake arm are not set, the characteristics little except the axial dimension that possesses existing internal expanding brake, that motion and sound is little and easy to maintenance, more compact structure is also relative with simple, occupied space less simultaneously.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments:
Fig. 1 is first kind of mode of execution structural drawing of internal expanding electromagnetic braker of the present invention;
Fig. 2 is the sectional view of Fig. 1;
Fig. 3 is second kind of mode of execution structural drawing of internal expanding electromagnetic braker of the present invention;
Fig. 4 is the sectional view of Fig. 3;
Fig. 5 is the brake block structural drawing of internal expanding electromagnetic braker of the present invention;
Fig. 6 is the bar structural drawing that manually declutches of internal expanding electromagnetic braker of the present invention.
Wherein, 1 is fixed iron core; 2 is coil; 3a, 3b, 3c, 3d are spring bearer plate; 4a, 4b are pressure spring; 5 is sliding bearing; 6 is axle sleeve; 7a, 7b are cushion pad; 8 is mobile armature; 9a, 9b, 9c, 9d are hex-head nut; 10a, 10b are for adjusting screw rod; 11 is the brake shoe pressing plate; 12a, 12b are the hexagon head bolt assembly parts; 13 is brake block; 14 is friction plate; 15 is the break main shaft; 16 are the bar that manually declutches; 17 is the main shaft cushion pad; 18 is mainshaft nut; 19a, 19b, 19c are main shaft sleeve; 20a, 20b are spring screw; 21a, 21b are spring nut; 22 is the mobile armature touch panel; 23a, 23b are the hexagon head bolt assembly parts; 24 is the push rod rotating shaft; 25 is push rod; 26 for adjusting screw; 27 is hex-head nut; 28 is sensitive switch; 29a, 29b, 29c, 29d are the break set screw; 30 is braking surface; 31 is fixed element; 32 is rectangular aperture; 33 is the shaft shoulder; 34 is rectangular opening.
Embodiment
As shown in Figure 1, 2, first kind of mode of execution of internal expanding electromagnetic braker of the present invention comprises fixed iron core 1, mobile armature 8, coil 2, brake block 13, friction plate 14, pressure spring 4.
Also comprise a main shaft 15, this main shaft 15 is arranged on by sliding bearing 5 and axle sleeve 6 in the hole in neutral position of fixed iron core 1.Sliding bearing 5 is a nonlubricated bearing, so needn't consider the lubrication problem of main shaft 15.The effect of axle sleeve 6 is to prevent that therefore sliding bearing 5 might, be positioned at sliding bearing 5 sides axle sleeve 6 is installed by being taken out of fixed iron core 1 in the hole of fixed iron core 1, and axle sleeve 6 is a drive fit with the hole of fixed iron core 1.
Described brake block 13 is provided with a rectangular aperture 32 (referring to Fig. 5), and main shaft 15 passes mobile armature 8 links together brake block 13 and main shaft 15 by this opening 32.The frictional force that brake block 13 bears is directly delivered on the main shaft 15.Described brake block 13 can move on main shaft 15.
Described main shaft 15 is provided with groove with the end face that brake block 13 is connected, and a cushion pad 17 is installed in this groove, utilizes cushion pad 17 can reduce the impact of 15 pairs of brake blocks 13 of main shaft.
The end of main shaft 15 is provided with a rectangular opening 34, when needs manually declutch, the bar 16 (in conjunction with Fig. 6) that manually declutches can be inserted in this rectangular opening 34, the rotation manual bar 16 that declutches, can drive main shaft 15 toward moving left, thereby make mobile armature 8 toward moving left and make brake block 13 to leave braking surface 30, realize manually declutching.Manually declutch bar 16 form structure as shown in Figure 6 because the cam profile part of bar 16 of manually declutching, the arc profile of two symmetries is arranged, therefore no matter the sense of rotation of the bar 16 that manually declutches how, can realize the action of manually declutching.
Fixed iron core 1 is installed on the fixed element 31 by screw 29.Be provided with between the inside of fixed iron core 1 and the mobile armature 8 coil 2, pressure spring 4, about two spring bearer plates 3.The part of the spring bearer plate 3 of right-hand member (being positioned at described mobile armature side) is at the mounting hole of fixed iron core 1, and another part is in the mounting hole of mobile armature 8, and such two spring bearer plates 3 can overcome mobile armature 8 rotatablely moving around main shaft 15.
The electromagnet electromagnetic attraction is slightly larger than the spring force that pressure spring 4 produces.Therefore be in the state of declutching when break, i.e. break energising inhale and the time, spring force and electromagnetic attraction can be offset substantially.And the stroke of mobile armature 8 is very short, is roughly 0.1 to 0.2mm, so the impact of 8 pairs of fixed iron cores 1 of mobile armature is little, the noise of generation is also little.In order further to reduce impact noise, the two ends up and down between fixed iron core 1 and mobile armature 8 are provided with two cushion pads 7, after the break energising, can slow down mobile armature 8 and are attracted to the impact that fixed iron core 1 place produces by electromagnetic attraction.
Regulation spring screw 20 promotes spring bearer plate 3, the length that can regulate pressure spring 4, and the spring force that is produced acts directly on the spring bearer plate 3, by spring bearer plate 3 spring force is passed to mobile armature 8 again.Loosening in order to prevent that spring screw 20 and fixed iron core 1 from taking place, spring nut 21 is set between them.
Be the face contact between brake shoe pressing plate 11 and the brake block 13, brake shoe pressing plate 11 adopts screw 12 to be connected with brake block 13.The brake spring power that mobile armature 8 bears is directly delivered on brake shoe pressing plate 11 and the brake block 13, produces drag friction power.Because brake shoe pressing plate 11 and brake block 13 link together, therefore when mobile armature 8 to away from the direction motion of braking surface 30 time, brake shoe pressing plate 11 and brake block 13 also move in the same direction, the action of declutching of realization break.
It is very approaching that the axis of the axis of pressure spring 4 and adjustment screw rod 10 can be provided with, the mobile armature 8 brake spring power of being born is directly delivered on brake shoe pressing plate 11 and the brake block 13 by adjusting screw rod 10 like this, the moment of flexure that mobile armature 8 is produced is little, therefore can reduce the effect of spring force, and then reduce requirement of strength mobile armature 8 to mobile armature 8.
In the intermediate portion of mobile armature 8 a mobile armature feeler lever 22 is installed, is fixed on the mobile armature 8 by hexagon head bolt assembly parts 23.When mobile armature 8 moved left, mobile armature feeler lever 22 is action left also, promoted push rod 25 and clockwise rotated around push rod rotating shaft 24.In the upper end of push rod 25 adjustment screw 26 is installed.When push rod 25 clockwise rotates, adjust screw 26 extruding sensitive switches 28, make sensitive switch 28 move.Sensitive switch 28 sends to the hoist machine control system with the signal that break is in the state of declutching.Adjusting screw 26 can move left and right, and therefore, adjust screw 26 and can regulate the distance of adjusting between screw 26 and the sensitive switch 28 easily by rotating, thereby to the position accuracy demand reduction of mobile armature feeler lever 22 with push rod 25.In order to prevent that adjusting screw 26 takes place to become flexible with push rod 25, is provided with hex-head nut 27 between them.
In first kind of mode of execution of internal expanding electromagnetic braker of the present invention, also main shaft 15 and brake block 13 closely can be linked together, be to be between them drive fit so also can realize brakeage, but changeing of friction plate is difficult relatively.
Second kind of mode of execution of internal expanding electromagnetic braker of the present invention is shown in Fig. 3,4.In second kind of mode of execution of the present invention, sliding bearing 5, axle sleeve 6, mainshaft nut 18 and main shaft sleeve 19 are not set on the main shaft 15, main shaft 15 is a drive fit with the matching hole of fixed iron core 1.Be arranged on and manually declutch rectangular opening 34 between mobile armature 8 and brake block 13 on the main shaft 15, and the part in these rectangular opening 34 holes extends to the inside of mobile armature 8.The bar 16 that manually declutches inserts in this rectangular opening 34, can directly promote mobile armature 8 and realize manually declutching of break.Other structural type, operating principle and first kind of mode of execution of the present invention are identical.
The operating principle that internal expanding electromagnetic braker of the present invention declutches is after the break energising, mobile armature 8 is to left movement, and attract each other with fixed iron core 1, mobile armature 8 is moved to the left by adjusting screw rod 10 drive brake blocks 13 simultaneously, therefore brake block 13 leaves braking surface 30, realizes declutching of break.Simultaneously, adjust screw 26 and move right, extruding sensitive switch 28, thus make sensitive switch 28 actions.
The operating principle of internal expanding electromagnetic braker braking of the present invention is after the break outage, the spring force that mobile armature 8 is compressed spring 4 promotes toward moving right, mobile armature 8 drives adjusts screw rod 10, brake shoe pressing plate 11 and brake block 13 toward moving right, and move to braking surface 30, produce braking force, realize the braking maneuver of break.
The present invention is embedded in whole break in the brake drum, brake drum axis symmetric arrangement, and as far as possible close braking surface relatively.Fixed iron core 1 place at break is provided with a main shaft 15, these main shaft 15 parts are passed mobile armature 8 and are extended in the brake block 13, brake block 13 can move on main shaft 15, and this main shaft 15 is used for bearing the torque that brake block 13 suffered drag friction power produce.The present invention is applied on the permanent-magnet synchnorous gearless dragging machine, and simple and reliable for structure, easy for installation, dismounting and fine setting are very easy to, can manually declutch, can save hoist machine axially and radial dimension.
Claims (10)
1, a kind of internal expanding electromagnetic braker, comprise fixed iron core, mobile armature, coil, brake block, friction plate, pressure spring, spring bearer plate, adjustment screw rod, whole break is embedded in the brake drum, but with respect to brake drum axis symmetric arrangement, it is characterized in that: one main shaft is set in described fixed iron core neutral position, this main shaft passes mobile armature and extends in the brake block and is connected with brake block, and described brake block can move on main shaft.
2, internal expanding electromagnetic braker as claimed in claim 1, it is characterized in that: described main shaft is arranged in the hole in fixed iron core neutral position by sliding bearing and axle sleeve, the end of main shaft extends the end face of fixed iron core, and be provided with one section outside thread at its end,, fixed iron core and mobile armature can be fixed together by screwing in mainshaft nut and main shaft sleeve at its terminal outside thread.
3, internal expanding electromagnetic braker as claimed in claim 2 is characterized in that: the end of described main shaft is provided with a rectangular opening.
4, internal expanding electromagnetic braker as claimed in claim 1, it is characterized in that: described main shaft extends the part of mobile armature, and cross section profile is a rectangle, and its boundary dimension is greater than the aperture of mobile armature, form the shaft shoulder of main shaft, the end face of this shaft shoulder and mobile armature links together.
5, internal expanding electromagnetic braker as claimed in claim 1 is characterized in that: the axis of described pressure spring is close with the axis of adjusting screw rod.
6, internal expanding electromagnetic braker as claimed in claim 1 is characterized in that: described main shaft and fixed iron core are drive fit.
7, internal expanding electromagnetic braker as claimed in claim 6 is characterized in that: the part of described main shaft between mobile armature and brake block is provided with a rectangular opening.
8, as claim 3 or 7 described internal expanding electromagnetic brakers, it is characterized in that: matching with described rectangular opening is provided with the bar that manually declutches, and its appearance profile is the cam profile of symmetric form.
9, internal expanding electromagnetic braker as claimed in claim 1, it is characterized in that: two spring bearer plates about being provided with between the inside of described fixed iron core and the mobile armature, the spring bearer plate that is positioned at described mobile armature side extends to the mounting hole of mobile armature.
10, internal expanding electromagnetic braker as claimed in claim 1 is characterized in that: the end face that described main shaft is connected with brake block is provided with groove, and a cushion pad is installed in this groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100935424A CN100343547C (en) | 2004-12-24 | 2004-12-24 | Internal expanding type electromagnetic brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100935424A CN100343547C (en) | 2004-12-24 | 2004-12-24 | Internal expanding type electromagnetic brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1796816A CN1796816A (en) | 2006-07-05 |
| CN100343547C true CN100343547C (en) | 2007-10-17 |
Family
ID=36818059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100935424A Expired - Fee Related CN100343547C (en) | 2004-12-24 | 2004-12-24 | Internal expanding type electromagnetic brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100343547C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101857178A (en) * | 2010-06-12 | 2010-10-13 | 石家庄五龙制动器有限公司 | Plate-type hub brake |
| CN109477531B (en) * | 2016-07-07 | 2020-03-03 | 株式会社日立制作所 | Electromagnetic brake device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6315088B1 (en) * | 1999-08-24 | 2001-11-13 | Warner Electric Technology, Inc. | Spring-set electromagnetically released brake |
| JP2003278809A (en) * | 2002-03-26 | 2003-10-02 | Shinko Electric Co Ltd | Manual releasing device of drum electromagnetic brake |
| CN1449357A (en) * | 2001-07-05 | 2003-10-15 | 三菱电机株式会社 | Elevator traction machine and brake system |
| WO2003085281A1 (en) * | 2002-04-05 | 2003-10-16 | Ogura Clutch Co., Ltd. | Electromagnetic drum brake |
-
2004
- 2004-12-24 CN CNB2004100935424A patent/CN100343547C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6315088B1 (en) * | 1999-08-24 | 2001-11-13 | Warner Electric Technology, Inc. | Spring-set electromagnetically released brake |
| CN1449357A (en) * | 2001-07-05 | 2003-10-15 | 三菱电机株式会社 | Elevator traction machine and brake system |
| JP2003278809A (en) * | 2002-03-26 | 2003-10-02 | Shinko Electric Co Ltd | Manual releasing device of drum electromagnetic brake |
| WO2003085281A1 (en) * | 2002-04-05 | 2003-10-16 | Ogura Clutch Co., Ltd. | Electromagnetic drum brake |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1796816A (en) | 2006-07-05 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071017 Termination date: 20191224 |