CN111030357A - Motor brake structure and servo motor - Google Patents
Motor brake structure and servo motor Download PDFInfo
- Publication number
- CN111030357A CN111030357A CN201911224326.1A CN201911224326A CN111030357A CN 111030357 A CN111030357 A CN 111030357A CN 201911224326 A CN201911224326 A CN 201911224326A CN 111030357 A CN111030357 A CN 111030357A
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- Prior art keywords
- hub
- brake
- motor
- channel
- rotating shaft
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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.)
- Pending
Links
- 238000004804 winding Methods 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- 230000017525 heat dissipation Effects 0.000 abstract description 10
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention relates to the technical field of brakes, in particular to a motor brake structure and a servo motor, which comprise a rotating shaft, an end cover, a brake mechanism, a hub and an encoder, wherein the end cover, the brake mechanism and the hub are sequentially arranged on the rotating shaft, and the encoder is connected to the shaft end. The blades are arranged on the hub, so that air around the hub can be driven to form large air pressure when the hub rotates, the large air pressure enters the first channel, the second channel and the third channel, heat dissipation is enhanced, heat transfer from the brake to the end cover is reduced, the reliability of the encoder is improved, meanwhile, the thermal load and the electric density of the brake can be designed to be high in the same space, the length of the brake is made to be short, and higher braking torque is obtained.
Description
Technical Field
The invention relates to the technical field of brakes, in particular to a motor brake structure and a servo motor.
Background
A brake is a device having a function of decelerating, stopping, or maintaining a stopped state of a moving member (or a moving machine), and is a mechanical component that stops or decelerates a moving member in a machine, and is commonly referred to as a brake or a gate. In the servo motor, the brake is mainly used for braking the servo motor and keeping a required position state, and the existing brake generally requires that the holding torque of the existing brake is larger than the rated torque of the servo motor so as to stop the brake suddenly in the application process of the servo motor or keep a shaft in a static state in the use process of the motor. If there are other loads on the motor, the holding torque requirement for the brake is about 1.5 to 2.5 times the rated torque of the motor. In the matching use with the motor, in order to guarantee the reliability and the service life of the brake, the brake is generally installed in the motor, the heat dissipation of the brake mainly depends on the heat transfer of the installation part of the motor to conduct heat or the structural heat dissipation of the brake, the size of an installation tool is limited, the motor is generally required to have higher electromagnetic load and high power density, and the brake is also required to have small volume and large holding torque, so the electromagnetic load and the heat load of the brake are high, and the winding of the brake generates heat seriously. The motor accessible outside air heat dissipation or with the erection joint heat transfer, transmit away the inside winding temperature rise of motor, and the stopper can only be through the position heat conduction heat of being connected with the motor, and the radiating effect is relatively poor, mainly leads to the end cover temperature to rise through the end cover heat conduction, and is provided with the encoder on the end cover usually, and the encoder is light-sensitive element, and its operating temperature is lower, can influence its reliability under the high temperature.
Disclosure of Invention
In order to solve the above problems, the present invention provides a motor brake structure, and a servo motor including the motor brake structure.
The invention is realized by adopting the following scheme:
a motor brake structure comprises a rotating shaft, an end cover, a brake mechanism, a hub and an encoder, wherein the end cover, the brake mechanism and the hub are sequentially arranged on the rotating shaft, the encoder is connected to the shaft end, intervals are arranged between the brake mechanism and the inner side wall of the end cover and between the hub and the inner side wall of the end cover, the intervals form a first channel for gas circulation, a plurality of second channels for gas circulation are arranged on the inner bottom surface of the end cover, and the second channels are communicated with the first channel; the braking mechanism is sleeved on the rotating shaft, a gap is formed between the braking mechanism and the outer wall of the rotating shaft, a third channel for gas circulation is formed by the gap between the braking mechanism and the outer wall of the rotating shaft, and the third channel is communicated with the second channel.
Furthermore, the second channels are distributed on the inner bottom surface of the end cover in a circular array by taking the central axis of the end cover as a reference.
Furthermore, one surface of the hub, which is far away from the brake, is provided with a plurality of fan blades.
Furthermore, the fan blades are arranged in a circular array by taking the central axis of the hub as a reference, and the direction of the fan blades points to the edge of the hub from the central axis of the hub.
Furthermore, the braking mechanism comprises an iron core connected with the rotating shaft, a winding arranged on the iron core, and an armature matched with the winding; one side of the iron core facing the hub is provided with an accommodating groove, and the winding is arranged in the accommodating groove.
Further, a plurality of springs are connected between the armature and the hub.
Furthermore, one surface of the iron core, which faces to the inner bottom surface of the end cover, is fixedly connected with the inner bottom surface of the end cover.
Furthermore, one surface of the hub facing the brake mechanism is provided with a plurality of friction plates.
Furthermore, one surface of the hub facing the braking mechanism is provided with a concave part for installing the friction plate.
A servo motor comprises the motor brake structure.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, a first channel is formed between the brake mechanism and the inner side wall of the end cover, a second channel is arranged at the inner bottom of the end cover, a third channel is formed between the brake mechanism and the outer wall of the rotating shaft, the blades are arranged on the hub, and the blades can drive surrounding air to form large air pressure when rotating, and the large air pressure enters the first channel, the second channel and the third channel, so that the heat dissipation is enhanced, the heat transfer from the brake to the end cover is reduced, the reliability of the encoder is improved, meanwhile, the heat load and the electric density of the brake can be designed to be higher in the same space, the length of the brake is shorter, and higher. On the other hand, the fan blades of the hub have the function similar to reinforcing ribs to increase the strength of the hub, the hub can be designed to be thinner under the same condition, and the fan blades also have the heat dissipation function.
Drawings
Fig. 1 is a schematic structural diagram of a motor brake structure according to the present invention.
Fig. 2 is a schematic structural view of the end cap of the present invention.
Fig. 3 is a schematic structural view of the hub of the present invention.
The figure includes:
the brake mechanism comprises a rotating shaft 1, an end cover 2, a second channel 21, a brake mechanism 3, an iron core 31, a winding 32, an armature 33, an accommodating groove 34, a spring 35, a hub 4, a fan blade 41, a friction plate 42, a concave part 43, an encoder 5, a first channel 6 and a third channel 7.
Detailed Description
To facilitate an understanding of the present invention for those skilled in the art, the present invention will be described in further detail below with reference to specific embodiments and accompanying drawings.
Referring to fig. 1 to 3, the motor brake structure provided by the invention comprises a rotating shaft 1, an end cover 2, a brake mechanism 3, a hub 4 and an encoder 5 connected to the shaft end, wherein the end cover 2, the brake mechanism 3, the hub 4 and the inner side wall of the end cover 2 are sequentially arranged on the rotating shaft 1, intervals are arranged between the brake mechanism 3 and the inner side wall of the end cover 2 and between the hub 4 and the inner side wall of the end cover 2, the intervals form a first channel 6 for gas circulation, a plurality of second channels 21 for gas circulation are arranged on the inner bottom surface of the end cover 2, and the second channels 21 are communicated with the first channel 6. The second channels 21 are distributed on the inner bottom surface of the end cover 2 in a circular array by taking the central axis of the end cover 2 as a reference. In the present embodiment, the second passages 21 are substantially fan-shaped and are provided in 6 numbers, and a mounting surface for connecting the brake mechanism 3 is formed between adjacent second passages 21, and the mounting surface does not close the second passages 21, so that the second passages 21 can communicate with the intermediate position of the end cover 2.
The braking mechanism 3 is sleeved on the rotating shaft 1, a gap is formed between the braking mechanism 3 and the outer wall of the rotating shaft 1, and a third channel 7 for gas circulation is formed by the gap between the braking mechanism 3 and the outer wall of the rotating shaft 1. In specific implementation, the end cap 2 is further connected with an encoder 5 cap for protecting the encoder 5. The third passage 7 communicates with the second passage 21.
And one surface of the hub 4, which is far away from the brake, is provided with a plurality of fan blades 41. The fan blades 41 are arranged in a circular array by taking the central axis of the hub 4 as a reference, and the direction of the fan blades 41 points to the edge of the hub 4 from the central axis of the hub 4. The blades 41 may form an axial or centrifugal fan, and when the motor is operated, the hub 4 and the shaft rotate synchronously, the blades 41 on the hub 4 drive the surrounding air to form a large wind pressure, and under the wind pressure, the air advances along a designed channel to heat the brake. The fan blades 41 of the hub 4 have the similar reinforcing rib function, so that the strength of the hub 4 is improved, the hub 4 can be designed to be thinner under the same condition, and the fan blades also have the heat dissipation function. The fan blade 41 is not limited to the hub 4, and may be added to another component that can rotate synchronously with the shaft.
The braking mechanism 3 comprises an iron core 31 connected with the rotating shaft 1, a winding 32 arranged on the iron core 31, and an armature 33 matched with the winding 32; one side of the iron core 31 facing the hub 4 is provided with an accommodating groove 34, and the winding 32 is arranged in the accommodating groove 34. A plurality of springs 35 are connected between the armature 33 and the hub 4 so that the armature 33 can be reset after braking by the coil 32. And one surface of the iron core 31 facing to the inner bottom surface of the end cover 2 is fixedly connected with the inner bottom surface of the end cover 2. The iron core 31 and the armature 33 are provided with holes through which the rotating shaft 1 passes.
A plurality of friction plates 42 are provided on a surface of the hub 4 facing the brake mechanism 3. The hub 4 is provided with a recess 43 for receiving the friction plate 42 on the side facing the brake mechanism 3. The friction plate 42 may be fixed at the lower recess 43 of the hub 4 by glue.
During specific work, the rotating shaft 1 rotates to drive the hub 4 to rotate, so that the fan blades 41 drive surrounding air to form large wind pressure, and the air enters from the first channel 6 and then flows to the second channel 21 and the third channel 7 to enhance heat dissipation.
The invention also provides a servo motor which comprises the motor brake structure.
According to the invention, a first channel is formed between the brake mechanism and the inner side wall of the end cover, a second channel is arranged at the inner bottom of the end cover, a third channel is formed between the brake mechanism and the outer wall of the rotating shaft, the blades are arranged on the hub, and the blades can drive surrounding air to form large air pressure when rotating, and the large air pressure enters the first channel, the second channel and the third channel, so that the heat dissipation is enhanced, the heat transfer from the brake to the end cover is reduced, the reliability of the encoder is improved, meanwhile, the heat load and the electric density of the brake can be designed to be higher in the same space, the length of the brake is shorter, and higher. On the other hand, the fan blades of the hub have the function similar to reinforcing ribs to increase the strength of the hub, the hub can be designed to be thinner under the same condition, and the fan blades also have the heat dissipation function.
In the description of the present invention, it is to be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings and are only for convenience in describing the present invention and simplifying the description, but are not intended to indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, e.g., as meaning permanently attached, removably attached, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the scope of the included claims.
Claims (10)
1. A motor brake structure comprises a rotating shaft, an end cover, a brake mechanism, a hub and an encoder, wherein the end cover, the brake mechanism and the hub are sequentially arranged on the rotating shaft; the braking mechanism is sleeved on the rotating shaft, a gap is formed between the braking mechanism and the outer wall of the rotating shaft, a third channel for gas circulation is formed by the gap between the braking mechanism and the outer wall of the rotating shaft, and the third channel is communicated with the second channel.
2. The motor brake structure of claim 1, wherein the second channels are distributed in a circular array on the inner bottom surface of the end cap with respect to a central axis of the end cap.
3. A motor brake arrangement according to claim 1, wherein the face of the hub remote from the brake is provided with a plurality of vanes.
4. The motor brake structure of claim 2, wherein the blades are arranged in a circular array with respect to a central axis of the hub, and the blades are oriented from the central axis of the hub to an edge of the hub.
5. The motor brake structure of claim 1, wherein the braking mechanism comprises a core connected to the shaft, a winding disposed on the core, and an armature mated to the winding; one side of the iron core facing the hub is provided with an accommodating groove, and the winding is arranged in the accommodating groove.
6. The motor brake structure of claim 5 wherein a plurality of springs are connected between the armature and the hub.
7. The motor brake structure of claim 5 wherein the face of the core facing the inner bottom surface of the end cap is fixedly attached to the inner bottom surface of the end cap.
8. The motor brake arrangement of claim 1, wherein a plurality of friction discs are provided on a face of the hub facing the brake mechanism.
9. A motor brake arrangement according to claim 8, in which the face of the hub facing the brake mechanism is provided with a recess for receiving a friction pad.
10. A servo motor comprising a motor brake arrangement according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911224326.1A CN111030357A (en) | 2019-12-04 | 2019-12-04 | Motor brake structure and servo motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911224326.1A CN111030357A (en) | 2019-12-04 | 2019-12-04 | Motor brake structure and servo motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111030357A true CN111030357A (en) | 2020-04-17 |
Family
ID=70204161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911224326.1A Pending CN111030357A (en) | 2019-12-04 | 2019-12-04 | Motor brake structure and servo motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111030357A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112448548A (en) * | 2020-11-04 | 2021-03-05 | 江西南马电气有限公司 | Encoder protection mechanism for monitoring |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6219056U (en) * | 1985-07-15 | 1987-02-04 | ||
| CN2766442Y (en) * | 2005-01-26 | 2006-03-22 | 连云港市雄鹰电工电子研究所有限公司 | Electromagnetic brake motor |
| CN202840803U (en) * | 2012-10-11 | 2013-03-27 | 浙江家利乐机电有限公司 | Electromagnetic engagement mechanism |
| CN203278538U (en) * | 2013-06-13 | 2013-11-06 | 东阳市东政电机有限公司 | Motor brake structure for door |
| CN203326802U (en) * | 2012-04-24 | 2013-12-04 | 日本电产三协株式会社 | Motor with brake |
| CN203638932U (en) * | 2013-12-27 | 2014-06-11 | 沈阳蓝光永磁电机技术有限公司 | Solid core inner rotor type gearless permanent magnet synchronous tractor for villa elevator |
| CN205039659U (en) * | 2015-10-08 | 2016-02-17 | 三峡大学 | Electromagnetic braking ware with distance sensor |
| CN206918129U (en) * | 2017-06-02 | 2018-01-23 | 苏州采奕动力科技有限公司 | It is a kind of with hollow structure without excitation brake |
| CN207573176U (en) * | 2017-10-30 | 2018-07-03 | 株式会社安川电机 | A kind of servo motor |
| CN109831072A (en) * | 2019-02-21 | 2019-05-31 | 珠海格力电器股份有限公司 | Electric machine |
-
2019
- 2019-12-04 CN CN201911224326.1A patent/CN111030357A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6219056U (en) * | 1985-07-15 | 1987-02-04 | ||
| CN2766442Y (en) * | 2005-01-26 | 2006-03-22 | 连云港市雄鹰电工电子研究所有限公司 | Electromagnetic brake motor |
| CN203326802U (en) * | 2012-04-24 | 2013-12-04 | 日本电产三协株式会社 | Motor with brake |
| CN202840803U (en) * | 2012-10-11 | 2013-03-27 | 浙江家利乐机电有限公司 | Electromagnetic engagement mechanism |
| CN203278538U (en) * | 2013-06-13 | 2013-11-06 | 东阳市东政电机有限公司 | Motor brake structure for door |
| CN203638932U (en) * | 2013-12-27 | 2014-06-11 | 沈阳蓝光永磁电机技术有限公司 | Solid core inner rotor type gearless permanent magnet synchronous tractor for villa elevator |
| CN205039659U (en) * | 2015-10-08 | 2016-02-17 | 三峡大学 | Electromagnetic braking ware with distance sensor |
| CN206918129U (en) * | 2017-06-02 | 2018-01-23 | 苏州采奕动力科技有限公司 | It is a kind of with hollow structure without excitation brake |
| CN207573176U (en) * | 2017-10-30 | 2018-07-03 | 株式会社安川电机 | A kind of servo motor |
| CN109831072A (en) * | 2019-02-21 | 2019-05-31 | 珠海格力电器股份有限公司 | Electric machine |
Non-Patent Citations (3)
| Title |
|---|
| BAILEY等: "《Inductive DC Motor Brake》", 12 February 2005 * |
| GUPTA等: "《Mechanical Brake for Hydraulic Actuator System》", 7 February 2005 * |
| 陈齐平等: "轮毂电机嵌入式电磁驻车制动设计与仿真 ", 《重庆大学学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112448548A (en) * | 2020-11-04 | 2021-03-05 | 江西南马电气有限公司 | Encoder protection mechanism for monitoring |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200417 |