CN112104151B - Servo motor and electromagnetic friction type brake - Google Patents
Servo motor and electromagnetic friction type brake Download PDFInfo
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- CN112104151B CN112104151B CN202010961676.2A CN202010961676A CN112104151B CN 112104151 B CN112104151 B CN 112104151B CN 202010961676 A CN202010961676 A CN 202010961676A CN 112104151 B CN112104151 B CN 112104151B
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- brake
- base
- friction
- electromagnetic
- coupling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
- H02K7/1021—Magnetically influenced friction brakes
- H02K7/1023—Magnetically influenced friction brakes using electromagnets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention provides a servo motor and an electromagnetic friction type brake, wherein the electromagnetic friction type brake comprises a base (3), an armature, a friction plate (4), a brake end cover and a coupler (6). A brake spring and a brake coil are installed in the base, and a guide column extending along the electromagnetic force direction of the brake coil is arranged outside the base; the brake end cover is fixedly connected with the base, the friction plate is positioned between the brake end cover and the base, the armature is positioned between the friction plate and the base, and both the friction plate and the armature are slidably connected with the guide post; the coupling is fixedly connected with the friction plate, and the brake spring is abutted against the armature. The electromagnetic friction type brake provided by the invention can effectively improve the control precision of the servo motor.
Description
Technical Field
The invention relates to the technical field of electromechanical products, in particular to a servo motor and an electromagnetic friction type brake.
Background
In order to realize the power-off maintaining function of the servo motor, a brake needs to be installed on a motor shaft, a common brake is an electromagnetic friction type brake, and the current assembly mode of the electromagnetic friction type brake and the motor shaft of the servo motor is that a hub is fixedly installed on the motor shaft, and a friction plate is connected with the hub through a key to transmit torque. Because the friction plate has axial play, the friction plate and the hub need to be designed into clearance fit so as to ensure that the friction plate and the hub can axially move relatively.
The clearance fit between the friction plate and the hub causes a back clearance in the twisting direction, and after the friction plate is locked, the motor shaft still shakes to influence the control precision of the servo motor. Therefore, how to improve the electromagnetic friction brake to improve the control accuracy of the servo motor is an urgent technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of this, the present invention provides a servo motor and an electromagnetic friction brake, which can effectively improve the control accuracy of the servo motor.
In order to achieve the purpose, the invention provides the following technical scheme:
an electromagnetic friction brake comprising:
the brake device comprises a base, a brake spring and a brake coil are installed in the base, and a guide column extending along the electromagnetic force direction of the brake coil is arranged outside the base;
the brake end cover is fixedly connected with the base;
the friction plate is positioned between the brake end cover and the base and is connected with the guide column in a sliding mode;
the armature is positioned between the friction plate and the base and is in slidable connection with the guide post, and the brake spring abuts against the armature; and
and the coupler is fixedly connected with the friction plate.
Optionally, in the electromagnetic friction brake, a regular polygonal mounting hole is formed in the middle of the friction plate, and one end of the coupling is connected with the mounting hole in an interference fit manner.
Optionally, in the electromagnetic friction brake, the friction plate and the coupling are bonded by glue and are locked and fixed by a screw.
Optionally, in the electromagnetic friction brake described above, the coupling is an elastic coupling.
Optionally, in the electromagnetic friction brake described above, the coupling is a diaphragm coupling.
Optionally, in the electromagnetic friction brake, the electromagnetic friction brake further includes an elastic diaphragm, and the elastic diaphragm is located on the other side of the base opposite to the friction plate and is fixedly connected to the base.
Alternatively, in the electromagnetic friction brake described above, the elastic diaphragm is in a hexagonal star shape.
A servo motor, the casing of which is provided with an electromagnetic friction brake as disclosed in any one of the above.
According to the technical scheme, the coupler is fixedly connected to the friction plate in the electromagnetic friction type brake provided by the invention, when the electromagnetic friction type brake is connected with the motor shaft of the servo motor, the motor shaft is only required to be connected with the coupler, and the electromagnetic friction type brake provided by the invention can effectively improve the control precision of the servo motor because no back clearance exists between the coupler and the motor shaft in the torsion direction.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a cross-sectional view of a servo motor according to an embodiment of the present invention;
fig. 2 is a schematic perspective exploded view of a servo motor according to an embodiment of the present invention;
FIG. 3 is a schematic perspective view of the base 3 of FIG. 2;
FIG. 4 is a front view of the part shown in FIG. 3;
FIG. 5 is a cross-sectional view B-B of FIG. 4;
fig. 6 is a perspective view of the coupling 6 of fig. 2;
fig. 7 is a schematic view of the coupling 6 of fig. 6 assembled with the friction plate 4 of fig. 5;
FIG. 8 is a schematic view at A of FIG. 1 with the brake locked;
FIG. 9 is a schematic view at A of FIG. 1 with the brakes released;
fig. 10 is a schematic view of a servo motor according to a second embodiment of the present invention;
FIG. 11 is an exploded view of the detail of FIG. 10;
fig. 12 is a schematic view of the elastomeric membrane 10 of fig. 10.
Labeled as:
1. a housing; 2. a motor shaft; 3. a base; 31. a brake spring; 4. a friction plate; 5. fixing the bolt; 6. a coupling; 61. locking the bolt; 7. a guide post; 8. an armature; 9. a brake end cover; 10. an elastic diaphragm.
Detailed Description
For the purpose of facilitating understanding, the present invention will be further described with reference to the accompanying drawings.
Example one
Referring to fig. 1 to 5, fig. 1 is a sectional view of a servo motor according to an embodiment of the present invention, fig. 2 is a disassembled perspective view of the servo motor according to the embodiment of the present invention, fig. 3 is a perspective view of a base 3 in fig. 2, fig. 4 is a front view of a part shown in fig. 3, and fig. 5 is a sectional view B-B in fig. 4.
As shown in fig. 5 and 6, the electromagnetic friction brake is mounted on a casing 1 of the servo motor provided in the first embodiment of the present invention, and includes a base 3, an armature 8, a friction plate 4, a brake end cover 9, and a coupling 6, wherein a brake spring 31 and a brake coil (not shown in the figure) are mounted in the base 3, and a guide post 7 (see fig. 3) extending along an electromagnetic force direction of the brake coil is disposed outside the base 3; the brake end cover 9 is fixedly connected with the base 3, the friction plate 4 is located between the brake end cover 9 and the base 3, the armature 8 is located between the friction plate 4 and the base 3, the friction plate 4 and the armature 8 are both connected with the guide post 7 in a sliding mode, and the brake spring 31 abuts against the armature 8. As shown in fig. 1 and 7, the coupling 6 is fixedly connected to the friction plate 4.
When the brake coil in the base 3 is powered off, the pre-tightened brake spring 31 pushes the armature 8, the armature 8 and the brake end cover 9 clamp the friction plate 4, and the locking function is realized, as shown in fig. 8, a gap a is formed between the armature 8 and the base 3 at the moment; when the brake coil in the base 3 is energized, the armature 8 is attracted to the base 3 by magnetic force, and overcomes the pushing force of the brake spring 31, so that the friction plate 4 is released, as shown in fig. 9, and a gap b is formed between the brake end cover 9 and the friction plate 4.
As shown in figure 1, a friction plate 4 of the electromagnetic friction type brake is connected with a motor shaft 2 of a servo motor through a coupler 6, and no back clearance exists between the coupler 6 and the motor shaft 2 in the torsion direction, so that the electromagnetic friction type brake provided by the invention can effectively improve the control precision of the servo motor.
As can be seen from fig. 1 and 2, in the present embodiment, the coupling 6 and the motor shaft 2 are connected by a hoop fastening method, and the hoop force of the coupling 6 increases as the lock bolt 61 is tightened. In other embodiments, the coupling 6 can be connected with the motor shaft 2 by other methods such as jackscrew fastening.
In specific practical application, the friction plate 4 and the coupler 6 can be fixedly connected in a plurality of ways, for example, a regular polygonal mounting hole can be formed in the middle of the friction plate 4, and then one end of the coupler 6 is connected with the mounting hole in an interference fit manner. For another example, the friction plate 4 and the coupling 6 are bonded by glue and are locked and fixed by screws. As can be seen from fig. 6 and 7, in the former manner, the middle portion of the friction plate 4 is provided with a regular hexagonal mounting hole, the end portion of the coupling 6 is provided with a regular hexagonal boss, and the boss is connected with the mounting hole in an interference fit manner.
As shown in fig. 6, in the present embodiment, the coupling 6 is an elastic coupling, which can solve the problem of the friction plate 4 not being coaxial or axially floating with the motor shaft 2. In other embodiments, the coupling 6 may also be a diaphragm coupling, which can also solve the above problems.
Example two
As can be seen from fig. 1 and 2, in the first embodiment, the base 3 of the electromagnetic friction brake is fixedly connected to the housing 1 by the fixing bolt 5, and the second embodiment is different from the first embodiment in the connection manner between the base 3 and the housing 1.
Referring to fig. 10 and 11, fig. 10 is a schematic view of a servo motor according to a second embodiment of the present invention, and fig. 11 is an exploded view of the parts of fig. 10. In the second embodiment, the electromagnetic friction brake further includes an elastic diaphragm 10, and the elastic diaphragm 10 is located on the other side of the base 3 opposite to the friction plate 4 and is fixedly connected with the base 3. In a specific practical application, the elastic diaphragm 10 may be in a hexagon star shape, as shown in fig. 12, the elastic diaphragm 10 has two sets of bolt holes arranged in a central symmetry manner, wherein one set of the outer ring is used for being fixedly connected with the casing 1, one set of the inner ring is used for being fixedly connected with the base 3, the elastic diaphragm 10 can transmit torque, and simultaneously, the elastic restoring force is axially provided for the brake, so that the base 3 can move axially.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. An electromagnetic friction brake, comprising:
the brake device comprises a base (3), wherein a brake spring (31) and a brake coil are installed in the base (3), and a guide column (7) extending along the electromagnetic force direction of the brake coil is arranged outside the base (3);
the brake end cover (9), the said brake end cover (9) is fixedly connected with said base (3);
the friction plate (4) is positioned between the brake end cover (9) and the base (3), and is connected with the guide column (7) in a sliding mode;
the armature (8), the armature (8) is positioned between the friction plate (4) and the base (3) and is connected with the guide post (7) in a sliding mode, and the brake spring (31) is abutted to the armature (8); and
the coupler (6), the said coupler (6) is fixedly connected with said friction disc (4);
elastic diaphragm (10), elastic diaphragm (10) are located the relative of base (3) the opposite side of friction disc (4), elastic diaphragm (10) have two sets of bolt holes that centrosymmetric arranged, one of them group be used for with base (3) fixed connection, another group be used for with install electromagnetic friction formula stopper's casing (1) fixed connection.
2. The electromagnetic friction brake as recited in claim 1, characterized in that a regular polygonal mounting hole is opened in the middle of the friction plate (4), and one end of the coupling (6) is connected with the mounting hole in an interference fit manner.
3. Electromagnetic friction brake according to claim 1, characterized in that the friction plates (4) are glued to the coupling (6) and locked in place by screws.
4. Electromagnetic friction brake according to claim 1, characterized in that said coupling (6) is an elastic coupling.
5. Electromagnetic friction brake according to claim 1, characterized in that said coupling (6) is a diaphragm coupling.
6. An electromagnetic friction brake as claimed in any one of claims 1 to 5, characterized in that said elastic diaphragm (10) is of a hexagonal star shape.
7. A servo motor characterized in that the electromagnetic friction brake according to any one of claims 1 to 6 is mounted on a housing of the servo motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010961676.2A CN112104151B (en) | 2020-09-14 | 2020-09-14 | Servo motor and electromagnetic friction type brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010961676.2A CN112104151B (en) | 2020-09-14 | 2020-09-14 | Servo motor and electromagnetic friction type brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112104151A CN112104151A (en) | 2020-12-18 |
| CN112104151B true CN112104151B (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010961676.2A Active CN112104151B (en) | 2020-09-14 | 2020-09-14 | Servo motor and electromagnetic friction type brake |
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| CN (1) | CN112104151B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101626177A (en) * | 2008-07-08 | 2010-01-13 | 深圳市大族精密机电有限公司 | Brake device of cylindrical linear motor and method thereof |
| JP2010259270A (en) * | 2009-04-27 | 2010-11-11 | Sanyo Electric Co Ltd | Electric motor and electric vehicle |
| CN106286641A (en) * | 2016-08-31 | 2017-01-04 | 北京术锐技术有限公司 | A kind of rotary type lamellar structure brake |
| CN110067814A (en) * | 2019-04-04 | 2019-07-30 | 江苏泰克曼传动设备有限公司 | A kind of positioning shaft coupling |
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- 2020-09-14 CN CN202010961676.2A patent/CN112104151B/en active Active
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| CN112104151A (en) | 2020-12-18 |
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