CN107687488B - Electromagnetic brake - Google Patents
Electromagnetic brake Download PDFInfo
- Publication number
- CN107687488B CN107687488B CN201610635357.6A CN201610635357A CN107687488B CN 107687488 B CN107687488 B CN 107687488B CN 201610635357 A CN201610635357 A CN 201610635357A CN 107687488 B CN107687488 B CN 107687488B
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- CN
- China
- Prior art keywords
- armature
- friction plate
- adjusting screw
- electromagnetic brake
- stator core
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
- F16D2121/20—Electric or magnetic using electromagnets
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to the technical field of brakes, in particular to an electromagnetic brake. The electromagnetic brake is of a split structure and comprises an upper block and a lower block, wherein the lower block comprises an armature, a coil, a spring and a stator core, and the armature is arranged on one side face of the stator core; the upper block comprises a friction plate which is fixedly connected with an external rotating shaft; one side surface of the friction plate is opposite to the armature, and the armature is combined with or separated from the friction plate under the action of a spring or a coil. According to the invention, the electromagnetic brake is arranged into a split structure, and the friction plate is directly and fixedly connected with the external rotating shaft, so that the use of structural members such as the adjusting screw, the hub and the column sleeve is reduced, the structure of the electromagnetic brake is simplified, and the effective contact area between the friction plate and the armature is correspondingly increased due to no limitation of the adjusting screw, the hub and the column sleeve, and the braking capability is improved.
Description
Technical Field
The invention relates to the technical field of brakes, in particular to an electromagnetic brake.
Background
The electromagnetic brake is an important basic component, integrates mechanical, electric and electronic technologies, and is mainly used for precisely controlling and braking a rotating mechanism (such as a motor device and the like). In the technical requirements of an electromagnetic brake, braking force between an armature and a friction plate is a key control point of the electromagnetic brake, and a spring and the armature friction plate are main devices for generating braking force.
In the prior art, chinese patent publication No. CN205047712U discloses an electromagnetic brake, which comprises a magnetic yoke, an armature, a friction plate, a hub, a compression spring, a coil and a limiting plate; the coil and the compression spring are arranged in the magnetic yoke; the armature side is arranged opposite to the coil and can reciprocate along the axial direction of the magnetic yoke; the limiting plate is arranged on the other side of the armature and connected with the magnetic yoke through a clearance adjusting screw rod, and the friction plate is arranged between the armature and the limiting plate and connected with the hub; the compression spring is used for applying pressure for pressing the friction plate to the limiting plate to the armature; the gap adjusting screw is provided with a position adjusting device used for adjusting the position of the limiting plate on the gap adjusting screw.
The electromagnetic brake of above-mentioned structure, the friction disc needs armature and limiting plate to the limiting plate links to each other with the yoke through adjusting screw, and the friction disc links to each other with outside rotation axis through wheel hub, still is provided with the column jacket that is used for the armature motion direction on the adjusting screw, because adjusting screw, wheel hub and column jacket's existence, can have the restriction effect to the size of friction disc, has less effective area of contact between corresponding armature and the friction disc, and then can reduce the braking force between armature and the friction disc, and current stopper still has the problem that the structure is complicated, manufacturing cost is high.
Therefore, an electromagnetic brake capable of solving the problems of small braking force, complex structure and high production cost existing in the conventional electromagnetic brake is provided.
Disclosure of Invention
The invention aims to provide an electromagnetic brake, which can solve the problems of small braking force, complex structure and high production cost of the traditional electromagnetic brake.
To achieve the purpose, the invention adopts the following technical scheme:
an electromagnetic brake, wherein the electromagnetic brake is of a split structure and comprises an upper block and a lower block, wherein the lower block comprises an armature, a coil, a spring and a stator core, and the armature is arranged on one side surface of the stator core;
the upper block comprises a friction plate which is fixedly connected with an external rotating shaft;
one side surface of the friction plate is opposite to the armature, and the armature is combined with or separated from the friction plate under the action of a spring or a coil.
As a preferable scheme of the electromagnetic brake, a baffle is arranged on the other side face of the friction plate, and the baffle and the friction plate are connected in a sticking mode.
As a preferable scheme of the electromagnetic brake, the baffle and the friction plate are provided with shaft holes, key notches are arranged on the shaft holes, and the baffle and the friction plate are connected with an external rotating shaft in a key mode.
As a preferable scheme of the electromagnetic brake, the baffle and the friction plate are provided with shaft holes, and the baffle and the friction plate are in interference fit with an external rotating shaft penetrating through the shaft holes.
As a preferable mode of the electromagnetic brake, the friction plate, the damper, the armature and the stator core have the same outer diameter.
As a preferable scheme of the electromagnetic brake, a plurality of uniformly distributed spring mounting grooves are formed in the stator core, and a spring is arranged in each spring mounting groove;
the armature iron is fixed on the stator core through an adjusting screw and is in sliding connection with the adjusting screw;
the adjusting screw sequentially penetrates through the armature and the spring, the first end of the adjusting screw is limited on the armature, the second end of the adjusting screw is in threaded connection with the stator core, the spring is compressed between the stator core and the armature, and the compression amount of the spring is adjusted through axial movement of the adjusting screw.
As a preferable mode of the electromagnetic brake, the distance between the armature and the stator core is 0.15 mm-0.2 mm in the state that the coil is in a power-off state.
As a preferable scheme of the electromagnetic brake, the armature is provided with the sinking groove, the first end of the adjusting screw is abutted with the bottom of the sinking groove in the state that the coil is in power failure, and the first end of the adjusting screw is separated from the bottom of the sinking groove in the state that the coil is in power failure, but the end face of the first end of the adjusting screw is not higher than the end face of the armature.
As a preferable scheme of the electromagnetic brake, the springs are compression springs, and the lower block comprises 6 springs which are uniformly distributed.
As a preferable scheme of the electromagnetic brake, the stator core is provided with a coil placing groove, the coil is arranged in the coil placing groove, and an insulation structure is arranged between the coil and the stator core.
The beneficial effects of the invention are as follows: according to the invention, the electromagnetic brake is arranged into a split structure, and the friction plate is directly and fixedly connected with the external rotating shaft, so that the use of structural members such as the adjusting screw, the hub and the column sleeve is reduced, the structure of the electromagnetic brake is simplified, and the effective contact area between the friction plate and the armature is correspondingly increased due to no limitation of the adjusting screw, the hub and the column sleeve, and the braking capability is improved.
Drawings
FIG. 1 is a schematic diagram of the structure of an upper block of an electromagnetic brake provided by an embodiment of the invention;
FIG. 2 is a schematic view of the structure of the lower block of the electromagnetic brake according to the embodiment of the invention;
fig. 3 is a schematic view of an internal structure of an electromagnetic brake according to an embodiment of the present invention.
Wherein:
1: upper blocking; 2: partitioning the lower part;
11: a friction plate; 12: a baffle;
21: an armature; 22: a coil; 23: a spring; 24: a stator core; 25: and adjusting the screw.
Detailed Description
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
As shown in fig. 1 to 3, the present embodiment provides an electromagnetic brake of a split structure including an upper block 1 and a lower block 2, wherein the lower block 2 includes an armature 21, a coil 22, a spring 23 and a stator core 24, the armature 21 is disposed on one side of the stator core 24, the upper block 1 includes a friction plate 11, and the friction plate 11 is fixedly connected with an external rotating shaft, one side of the friction plate 11 is disposed opposite to the armature 21, and the armature 21 is combined with or separated from the friction plate 11 under the action of the spring 23 or the coil 22.
In this embodiment, by setting the electromagnetic brake as a split structure and the friction plate 11 directly fixedly connected with the external rotating shaft, the use of structural members such as the adjusting screw, the hub and the column sleeve is reduced, the structure of the electromagnetic brake is simplified, and the effective contact area between the friction plate 11 and the armature 21 is correspondingly increased due to no restriction of the adjusting screw, the hub and the column sleeve, and the braking capability is improved. Secondly, while simplifying the structure of the electromagnetic brake, the overall thickness and manufacturing cost of the corresponding electromagnetic brake can be reduced.
The other side surface of the friction plate 11 is provided with a baffle plate 12, and the baffle plate 12 and the friction plate 11 are connected in a pasting mode. By the arrangement of the baffle plate 12, the friction plate 11 can be protected, and the structural strength of the friction plate 11 can be improved.
In the present embodiment, two connection modes of the friction plate 11, the baffle 12 and the external rotation shaft are provided:
the first is: the baffle 12 and the friction plate 11 are provided with shaft holes, key notches are arranged on the shaft holes, and the baffle 12 and the friction plate 11 are in key connection with an external rotating shaft.
The second is: the baffle 12 and the friction plate 11 are provided with shaft holes, and the baffle 12 and the friction plate 11 are in interference fit with an external rotating shaft penetrating through the shaft holes.
The two types of the friction plates 11 are mounted by the split structure, so that the friction plates 11 are mounted on the external rotating shaft with a high convenience compared with the conventional mounting method by the hub.
The friction plate 11, the damper 12, the armature 21, and the stator core 24 have the same outer diameter. The structure has the same outer diameter, can improve the effective contact area between the friction plate 11 and the armature 21, and simultaneously has the advantages of good integrity and convenient assembly.
The stator core 24 is provided with a plurality of uniformly distributed spring mounting grooves, each spring mounting groove is internally provided with a spring 23, the armature 21 is fixed on the stator core 24 through an adjusting screw 25, the armature 21 is in sliding connection with the adjusting screw 25, the adjusting screw 25 sequentially penetrates through the armature 21 and the springs 23, the first end of the adjusting screw is limited on the armature 21, the second end of the adjusting screw is in threaded connection with the stator core 24, the springs 23 are compressed between the stator core 24 and the armature 21, and the compression amount of the springs 23 is adjusted through axial movement of the adjusting screw 25.
By means of the cooperation of the adjusting screw 25 and the spring 23, a smooth movement of the armature 21 is ensured and the position of the armature 21 is adjusted as a function of the braking torque. Specifically, in the state where the coil 22 is in a power-off state, the distance between the armature 21 and the stator core 24 is 0.15mm to 0.2mm. Specifically, the distance between the two is 0.16mm, 0.17mm, 0.18mm, or 0.19mm.
The specific matching relationship between the adjusting screw 25 and the armature 21 is as follows: the armature 21 is provided with a countersink, the first end of the adjusting screw 25 abuts against the bottom of the countersink in the state that the coil 22 is in a power failure, and the first end of the adjusting screw 25 is separated from the bottom of the countersink in the state that the coil 22 is in a power failure, but the end face of the first end of the adjusting screw 25 is not higher than the end face of the armature 21 (i.e., the adjusting screw 25 does not protrude from the armature 21).
Through the setting form of the adjusting screw 25, the adjusting screw 25 can limit the armature 21 and simultaneously ensure that the adjusting screw 25 can not influence the normal movement of the friction plate 11 in the state that the coil is electrified.
The specific matching relationship between the adjusting screw 25 and the stator core 24 is: the bottom of the installation groove of the spring 23 is provided with a threaded hole, the adjusting screw 25 is in threaded connection with the threaded hole, and the compression amount of the spring 23 is adjusted through axial movement of the adjusting screw 25, so that the braking torque value is changed, and the braking torque value meets the use requirement.
The springs 23 are compression springs and the lower segment 2 comprises 6 evenly distributed springs 23. It should be noted that: the baffle 12 in this embodiment is not fixed on the stator core 24 by the adjusting bolt, so that the space occupied by the adjusting bolt is reduced, and therefore, in order to increase the braking force during braking, the number of spring holes can be increased when the requirement of electromagnetic attraction force is met, namely, the number of springs 23 is increased, and because the brake is of a split structure, the effective contact area between the friction plate 11 and the armature is increased, and further, the friction force during braking is increased. Through the cooperation of the two, the energy is saved and the braking performance is improved when the braking device runs for a long time.
In the present embodiment, there is also provided a fitting relationship of the coil 22 and the stator core 24, the stator core 24 is provided with a coil placement groove, the coil 22 is disposed in the coil placement groove, and an insulating structure is provided between the coil 22 and the stator core 24.
In order to further explain the electromagnetic brake, the embodiment also provides a specific working process of the electromagnetic brake:
firstly, the distance between the armature 21 and the stator core 24 is adjusted by the axial displacement of the adjusting screw 25, as required by the braking torque during assembly and long-term operation.
In a state where the coil 22 is in a power-off state (no current is supplied to the coil 22), the armature 22 is pressed to one side of the friction plate 11 by the pressure of the spring 23, the armature 21 is combined (contacted) with the friction plate 11, braking force is generated at the contact surface of the two under the action of friction force, and the braking force is transmitted to the external rotating shaft through the friction plate 11, so that the external rotating shaft stops rotating;
in a state where the coil 22 is energized (current is supplied to the coil 22), the armature 21 receives electromagnetic attractive force, overcomes the elastic force of the spring 23, moves to one side of the stator core 24 under the guide of the adjusting screw 25, and the armature 21 is disengaged from the friction plate 11, that is, the braking action on the external rotation shaft is released.
The technical principle of the present invention is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the invention and should not be taken in any way as limiting the scope of the invention. Other embodiments of the invention will be apparent to those skilled in the art from consideration of this specification without undue burden.
Claims (8)
1. The electromagnetic brake is characterized by being of a split structure and comprising an upper partition (1) and a lower partition (2), wherein the lower partition (2) comprises an armature (21), a coil (22), a spring (23) and a stator core (24), and the armature (21) is arranged on one side surface of the stator core (24);
the upper block (1) comprises a friction plate (11), and the friction plate (11) is fixedly connected with an external rotating shaft;
one side surface of the friction plate (11) is opposite to the armature (21), and the armature (21) is combined with or separated from the friction plate (11) under the action of a spring (23) or a coil (22);
a plurality of uniformly distributed spring mounting grooves are formed in the stator core (24), and a spring (23) is arranged in each spring mounting groove;
the armature (21) is fixed on the stator core (24) through an adjusting screw (25), and the armature (21) is in sliding connection with the adjusting screw (25);
the adjusting screw (25) sequentially passes through the armature (21) and the spring (23), the first end of the adjusting screw is limited on the armature (21), the second end of the adjusting screw is in threaded connection with the stator core (24), the spring (23) is compressed between the stator core (24) and the armature (21), and the compression amount of the spring (23) is adjusted through axial movement of the adjusting screw (25);
the other side face of the friction plate (11) is provided with a baffle plate (12), and the baffle plate (12) is connected with the friction plate (11) in a sticking mode.
2. The electromagnetic brake as recited in claim 1, wherein the baffle (12) and the friction plate (11) are provided with shaft holes, and key notches are provided in the shaft holes, and the baffle (12) and the friction plate (11) are in key connection with an external rotating shaft.
3. The electromagnetic brake as recited in claim 1, wherein the baffle (12) and the friction plate (11) are provided with shaft holes, and the baffle (12) and the friction plate (11) are in interference fit with an external rotating shaft penetrating through the shaft holes.
4. An electromagnetic brake as claimed in any one of claims 1 to 3, characterized in that the friction plate (11), the baffle (12), the armature (21) and the stator core (24) have the same outer diameter.
5. Electromagnetic brake according to claim 1, characterized in that the distance between the armature (21) and the stator core (24) is 0.15 mm-0.2 mm in the de-energized state of the coil.
6. The electromagnetic brake as defined in claim 1, wherein the armature (21) is provided with a countersink, the first end of the adjusting screw (25) is abutted against the bottom of the countersink in a state in which the coil (22) is deenergized, and the first end of the adjusting screw (25) is separated from the bottom of the countersink in a state in which the coil is deenergized, but the end face of the first end of the adjusting screw (25) is not higher than the end face of the armature (21).
7. Electromagnetic brake according to claim 1, characterized in that the springs (23) are compression springs and the lower segment comprises 6 evenly distributed springs (23).
8. Electromagnetic brake according to claim 1, characterized in that the stator core (24) is provided with coil placement grooves, the coil (22) is arranged in the coil placement grooves, and an insulation structure is arranged between the coil (22) and the stator core (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610635357.6A CN107687488B (en) | 2016-08-04 | 2016-08-04 | Electromagnetic brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610635357.6A CN107687488B (en) | 2016-08-04 | 2016-08-04 | Electromagnetic brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107687488A CN107687488A (en) | 2018-02-13 |
| CN107687488B true CN107687488B (en) | 2023-10-20 |
Family
ID=61151613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610635357.6A Active CN107687488B (en) | 2016-08-04 | 2016-08-04 | Electromagnetic brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107687488B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111089127A (en) * | 2020-01-19 | 2020-05-01 | 江苏开璇智能科技有限公司 | Novel electromagnetic power-off brake |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005054907A (en) * | 2003-08-05 | 2005-03-03 | Miki Pulley Co Ltd | Non-excitation actuated type electromagnetic brake |
| CN102235452A (en) * | 2011-06-21 | 2011-11-09 | 成都瑞迪机械实业有限公司 | Permanent magnet powerless magnetic brake |
| CN205047712U (en) * | 2015-08-28 | 2016-02-24 | 珠海格力节能环保制冷技术研究中心有限公司 | Electromagnetic brake |
| CN205371397U (en) * | 2016-01-13 | 2016-07-06 | 安徽立信电磁离合器有限公司 | Electromagnetism that can adjust friction surface clearance wantonly loses electric brake |
| CN205991117U (en) * | 2016-08-04 | 2017-03-01 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of electromagnetic brake |
-
2016
- 2016-08-04 CN CN201610635357.6A patent/CN107687488B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005054907A (en) * | 2003-08-05 | 2005-03-03 | Miki Pulley Co Ltd | Non-excitation actuated type electromagnetic brake |
| CN102235452A (en) * | 2011-06-21 | 2011-11-09 | 成都瑞迪机械实业有限公司 | Permanent magnet powerless magnetic brake |
| CN205047712U (en) * | 2015-08-28 | 2016-02-24 | 珠海格力节能环保制冷技术研究中心有限公司 | Electromagnetic brake |
| CN205371397U (en) * | 2016-01-13 | 2016-07-06 | 安徽立信电磁离合器有限公司 | Electromagnetism that can adjust friction surface clearance wantonly loses electric brake |
| CN205991117U (en) * | 2016-08-04 | 2017-03-01 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of electromagnetic brake |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107687488A (en) | 2018-02-13 |
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