CN113036983B - Brushless DC motor - Google Patents
Brushless DC motor Download PDFInfo
- Publication number
- CN113036983B CN113036983B CN202110282763.XA CN202110282763A CN113036983B CN 113036983 B CN113036983 B CN 113036983B CN 202110282763 A CN202110282763 A CN 202110282763A CN 113036983 B CN113036983 B CN 113036983B
- Authority
- CN
- China
- Prior art keywords
- piston
- rotor
- ring
- piston head
- motor
- Prior art date
- 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.)
- Active
Links
- 238000013016 damping Methods 0.000 claims description 21
- 230000006835 compression Effects 0.000 claims description 19
- 238000007906 compression Methods 0.000 claims description 19
- 238000005192 partition Methods 0.000 claims description 6
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 230000010349 pulsation Effects 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 description 6
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
-
- 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
- H02K7/003—Couplings; Details of shafts
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The application provides a brushless direct current motor, which comprises a shell, a stator assembly, a rotor assembly and a torsion damper, wherein the rotor assembly comprises a rotor body and a rotor shaft, the rotor body is coaxially arranged on the rotor shaft, the stator assembly is fixedly connected in the shell and is arranged in a matching way with the rotor body, and the torsion damper is arranged at two ends of the rotor body and is connected with the rotor shaft. When the brushless direct current motor is started, the permanent magnet rotates under the action of magnetic force, and then the torsion damper drives the rotation shaft to rotate to output torque. The torsional vibration damper can effectively attenuate torque pulsation generated when the motor is started or the rotating speed is suddenly changed, and has good practicability.
Description
Technical Field
The invention relates to the field of motors, in particular to a brushless direct current motor.
Background
At present, most of existing inner rotor type brushless direct current motors are formed by assembling permanent magnets and rotating shafts through interference, the whole rotor assembly is directly connected with the whole motor and an output shaft through rigidity, and when the brushless direct current motor is started or suddenly changes in rotating speed, torque pulsation is generated by the rotor assembly, and under the excitation, the whole brushless direct current motor is caused to vibrate. Irregular integral vibration can cause motion interference of parts in the motor, so that the working efficiency of the motor is affected, the failure rate of the motor is improved, and the service life of the motor is shortened.
Disclosure of Invention
Based on the above, in order to solve the problems that the rigid connection of the brushless motor easily generates resonance among parts and generates resonance stress, and torsional vibration and noise are large when a power system works under torque load, and the stability of output is seriously affected, the invention provides a brushless direct current motor, which has the following specific technical scheme:
The utility model provides a brushless direct current motor, includes casing, stator module, rotor subassembly and torsional damper, rotor module includes rotor body and rotor shaft, the rotor body in the coaxial setting of rotor shaft, stator module fixed connection in the casing and with rotor body looks adaptation sets up, torsional damper set up in the both ends of rotor body and with the rotor shaft is connected.
According to the brushless direct current motor, the torsional vibration damper is arranged to connect the rotor body with the rotor shaft, when the brushless direct current motor is started, the permanent magnet can rotate under the action of magnetic force, and then the torsional vibration damper drives the rotation shaft to rotate, so that torque is output outwards. The torsional vibration damper can effectively attenuate torque pulsation generated when the motor is started or the rotating speed is suddenly changed, and has good practicability.
Further, the torsional vibration damper comprises a plurality of damping pull rods, an outer ring and an inner ring, wherein the inner ring is sleeved at the end part of the rotor shaft, the outer ring and the inner ring are arranged at the end part of the rotor body in an adaptive manner, and the damping pull rods are connected between the inner ring and the outer ring.
Further, the damping pull rod comprises a cylinder barrel, a pull rod assembly, a push rod assembly, a first compression spring and a second compression spring, wherein the cylinder barrel is hollow, a partition plate is arranged in the middle of an inner cavity of the cylinder barrel, the inner cavity of the cylinder barrel is partitioned to form a first stroke cavity and a second stroke cavity through the partition plate, the pull rod assembly is in sliding connection with the first stroke cavity, a part of the pull rod assembly extends out of the first stroke cavity, the push rod assembly is in sliding connection with the second stroke cavity, a part of the push rod assembly extends out of the second stroke cavity, the first compression spring is arranged in the first stroke cavity, and the second compression spring is arranged in the second stroke cavity.
Further, the cylinder is a cylinder.
Further, the damping pull rod further comprises a first end cover and a second end cover, and the first end cover and the second end cover are respectively connected to two ends of the cylinder barrel.
Further, the pull rod assembly comprises a first bushing, a first piston rod, a first piston head and a first piston ring, wherein the first bushing and the first piston head are respectively connected to two ends of the first piston rod, the first piston ring is sleeved on the periphery of the first piston head, the first piston head is connected in the first travel cavity in a sliding manner through the first piston ring, and the first compression spring is sleeved on the periphery of the first piston rod; the push rod assembly comprises a second bushing, a second piston rod, a second piston head and a second piston ring, wherein the second bushing and the second piston head are respectively connected to two ends of the second piston rod, the second piston ring is sleeved on the periphery of the second piston head, the second piston head is slidably connected in the second stroke cavity through the second piston ring, and the second compression spring is sleeved on the periphery of the second piston rod.
Further, the first bushing is rotatably connected with the inner wall of the outer ring, and the second bushing is rotatably connected with the outer wall of the inner ring.
Further, the length of the first piston rod is longer than the length of the second piston rod.
Further, damping medium is filled in the first stroke cavity and the second stroke cavity.
Further, a plurality of damping holes are formed in the first piston head and the second piston head.
Drawings
The invention will be further understood from the following description taken in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.
Fig. 1 is a schematic structural view of a brushless dc motor according to one embodiment of the present invention;
Fig. 2 is a schematic structural view of a torsional vibration damper of a brushless dc motor according to an embodiment of the present invention;
FIG. 3 is a schematic view of a damping pull rod of a brushless DC motor according to one embodiment of the present invention;
FIG. 4 is a schematic diagram of a first energy dissipation assembly and a second energy dissipation assembly of a brushless DC motor according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a first energy dissipation assembly and a second energy dissipation assembly of a brushless dc motor according to an embodiment of the invention.
Reference numerals illustrate:
11. A front shell; 12. a middle shell; 13. a rear case; 2. a stator assembly; 31. a rotor shaft; 32. a rotor body; 33. a bearing; 4.a torsional vibration damper; 41. damping pull rod; 411. a first piston rod; 412. a first piston head; 413. a first piston ring; 414. a first end cap; 415. a first compression spring; 416. a cylinder; 417. a second bushing; 42. an outer ring; 43. an inner ring; 51. a hub; 52. and (3) arc.
Detailed Description
The present invention will be described in further detail with reference to the following examples thereof in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The terms "first" and "second" in this specification do not denote a particular quantity or order, but rather are used for distinguishing between similar or identical items.
As shown in fig. 1-5, a brushless dc motor according to an embodiment of the present invention includes a housing, a stator assembly 2, a rotor assembly and a torsional vibration damper 4, the rotor assembly includes a rotor body 32 and a rotor shaft 31, the rotor body 32 is coaxially disposed with the rotor shaft 31, the stator assembly 2 is fixedly connected in the housing and is adapted to the rotor body 32, and the torsional vibration damper 4 is disposed at two ends of the rotor body 32 and is connected with the rotor shaft 31.
In the brushless dc motor, the torsional vibration damper 4 is provided to connect the rotor body 32 and the rotor shaft 31, and when the brushless dc motor is started, the rotor body 32 will first rotate under the action of magnetic force, and then the torsional vibration damper 4 drives the rotation shaft to rotate, so as to output torque. The torsional vibration damper 4 can effectively attenuate torque pulsation generated when the motor is started or the rotating speed is suddenly changed, and has good practicability.
Specifically, the casing includes preceding shell 11, well shell 12 and the backshell 13 that connect gradually, it has the through-hole to open on the preceding shell 11, preceding shell 11 with all be provided with bearing 33 on the backshell 13, rotor shaft 31 with bearing 33 is connected, stator module 2 fixed connection in the well shell 12, the output of rotor shaft 31 passes the through-hole.
In one embodiment, the torsional vibration damper 4 includes a plurality of damping tie rods 41, an outer ring 42 and an inner ring 43, the inner ring 43 is sleeved on the end of the rotor shaft 31, the outer ring 42 and the inner ring 43 are adaptively disposed on the end of the rotor body 32, and the damping tie rods 41 are connected between the inner ring 43 and the outer ring 42.
In one embodiment, the damping pull rod 41 includes a cylinder 416, a pull rod assembly, a push rod assembly, a first compression spring 415 and a second compression spring, the cylinder 416 is hollow, a partition plate is disposed in the middle of an inner cavity of the cylinder 416, the inner cavity of the cylinder 416 is partitioned to form a first stroke cavity and a second stroke cavity by the partition plate, the pull rod assembly is slidably connected with the first stroke cavity and has a part extending out of the first stroke cavity, the push rod assembly is slidably connected with the second stroke cavity and has a part extending out of the second stroke cavity, the first compression spring 415 is disposed in the first stroke cavity, and the second compression spring is disposed in the second stroke cavity.
In one embodiment, the cylinder 416 is a cylinder.
In one embodiment, the damping rod 41 further includes a first end cap 414 and a second end cap, and the first end cap 414 and the second end cap are respectively connected to two ends of the cylinder 416.
In one embodiment, the first stroke chamber and the second stroke chamber are both filled with damping medium. Through the design of the end cover, one stroke of the pull rod assembly and the push rod assembly can be limited, and meanwhile damping media can move back and forth in the stroke cavity.
In one embodiment, the pull rod assembly includes a first bushing, a first piston rod 411, a first piston head 412, and a first piston ring 413, where the first bushing and the first piston head 412 are respectively connected to two ends of the first piston rod 411, the first piston ring 413 is sleeved on the outer periphery of the first piston head 412, the first piston head 412 is slidably connected to the first stroke cavity through the first piston ring 413, and the first compression spring 415 is sleeved on the outer periphery of the first piston rod 411; the push rod assembly comprises a second bushing 417, a second piston rod, a second piston head and a second piston ring, the second bushing 417 and the second piston head are respectively connected to two ends of the second piston rod, the second piston ring is sleeved on the periphery of the second piston head, the second piston head is slidably connected in the second stroke cavity through the second piston ring, and the second compression spring is sleeved on the periphery of the second piston rod.
In one embodiment, the first bushing is rotatably coupled to an inner wall of the outer ring 42 and the second bushing 417 is rotatably coupled to an outer wall of the inner ring 43.
In one embodiment, the length of the first piston rod 411 is longer than the length of the second piston rod.
In one embodiment, the first piston head 412 and the second piston head are each provided with a plurality of damping holes.
In one embodiment, the two ends of the rotor shaft 31 are respectively connected with a first energy consumption component and a second energy consumption component, the first energy consumption component and the second energy consumption component each comprise a hub 51 and three circular arcs 52 which are uniformly distributed around the outer surface of the hub 51, and the three circular arcs 52 on the first energy consumption component and the second energy consumption component are staggered with each other to form a circle. By this design, the center of gravity of the rotor shaft 31 can be adjusted by the respective arcs 52 during rotation, and thus, large shaking can be avoided.
In one embodiment, the two ends of the arc 52 are bent and increased towards the rotor shaft 31, and the arc 52 is made of rubber, so that the arc 52 can deform due to self weight in the rotation process to achieve the vibration reduction effect, and the center of gravity and the center of the rotor shaft 31 can be kept within the allowable error range through hysteresis generated by deformation.
Specifically, the circular arc 52 is not in contact with the inner wall of the housing.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (6)
1. The brushless direct current motor is characterized by comprising a shell, a stator assembly, a rotor assembly and a torsional vibration damper, wherein the rotor assembly comprises a rotor body and a rotor shaft, the rotor body and the rotor shaft are coaxially arranged, the stator assembly is fixedly connected in the shell and is arranged in a matching way with the rotor body, and the torsional vibration damper is arranged at two ends of the rotor body and is connected with the rotor shaft;
the torsional vibration damper comprises a plurality of damping pull rods, an outer ring and an inner ring, wherein the inner ring is sleeved at the end part of the rotor shaft, the outer ring and the inner ring are arranged at the end part of the rotor body in an adaptive manner, and the damping pull rods are connected between the inner ring and the outer ring;
The damping pull rod comprises a cylinder barrel, a pull rod assembly, a push rod assembly, a first compression spring and a second compression spring, wherein the cylinder barrel is hollow, a partition plate is arranged in the middle of an inner cavity of the cylinder barrel, the inner cavity of the cylinder barrel is partitioned by the partition plate to form a first stroke cavity and a second stroke cavity, the pull rod assembly is in sliding connection with the first stroke cavity, a part of the pull rod assembly extends out of the first stroke cavity, the push rod assembly is in sliding connection with the second stroke cavity, a part of the push rod assembly extends out of the second stroke cavity, the first compression spring is arranged in the first stroke cavity, and the second compression spring is arranged in the second stroke cavity;
The pull rod assembly comprises a first bushing, a first piston rod, a first piston head and a first piston ring, wherein the first bushing and the first piston head are respectively connected to two ends of the first piston rod, the first piston ring is sleeved on the periphery of the first piston head, the first piston head is connected in the first travel cavity in a sliding manner through the first piston ring, and the first compression spring is sleeved on the periphery of the first piston rod; the push rod assembly comprises a second bushing, a second piston rod, a second piston head and a second piston ring, wherein the second bushing and the second piston head are respectively connected to two ends of the second piston rod, the second piston ring is sleeved on the periphery of the second piston head, the second piston head is connected in the second stroke cavity in a sliding manner through the second piston ring, and the second compression spring is sleeved on the periphery of the second piston rod; damping medium is filled in the first stroke cavity and the second stroke cavity.
2. A brushless dc motor as claimed in claim 1, wherein the cylinder is cylindrical.
3. The brushless dc motor of claim 2 wherein the damping tie further comprises a first end cap and a second end cap, the first end cap and the second end cap being connected to respective ends of the cylinder.
4. A brushless dc motor as claimed in claim 1, wherein the first bushing is rotatably connected to the inner wall of the outer ring and the second bushing is rotatably connected to the outer wall of the inner ring.
5. A brushless dc motor as claimed in claim 1, wherein the length of the first piston rod is longer than the length of the second piston rod.
6. The brushless dc motor of claim 1 wherein the first piston head and the second piston head each have a plurality of damping holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110282763.XA CN113036983B (en) | 2021-03-16 | 2021-03-16 | Brushless DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110282763.XA CN113036983B (en) | 2021-03-16 | 2021-03-16 | Brushless DC motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113036983A CN113036983A (en) | 2021-06-25 |
| CN113036983B true CN113036983B (en) | 2024-07-05 |
Family
ID=76471197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110282763.XA Active CN113036983B (en) | 2021-03-16 | 2021-03-16 | Brushless DC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113036983B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113595316B (en) * | 2021-08-02 | 2022-07-08 | 绍兴上风电机科技股份有限公司 | Motor heat dissipation shock mounting |
| DE102021214732A1 (en) | 2021-12-20 | 2023-06-22 | Rolls-Royce Deutschland Ltd & Co Kg | Electrical machine with a multi-part coupling device |
| CN115833467B (en) * | 2023-02-14 | 2023-05-02 | 三谷科技(东莞)有限公司 | DC brushless motor with output vibration reduction function |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207426888U (en) * | 2017-11-29 | 2018-05-29 | 南京越博电驱动系统有限公司 | A kind of permanent magnet synchronous motor of built-in torsional vibration damper |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5185543A (en) * | 1990-02-27 | 1993-02-09 | Fichtel & Sachs Ag | Motor vehicle drive line torsional vibration damper |
| JP4871216B2 (en) * | 2007-05-31 | 2012-02-08 | アスモ株式会社 | Brushless motor |
| CN207234594U (en) * | 2017-10-12 | 2018-04-13 | 南京越博电驱动系统有限公司 | A kind of motor of built-in torsion vibration absorber |
| CN207968268U (en) * | 2018-02-09 | 2018-10-12 | 南京越博电驱动系统有限公司 | A kind of permanent magnet synchronous motor being integrated with torsional vibration damper |
| CN211089249U (en) * | 2019-09-26 | 2020-07-24 | 常州神力小微电机有限公司 | High-strength anti-torsion motor iron core |
| CN112013036A (en) * | 2020-09-07 | 2020-12-01 | 唐荣富 | Automobile torsional vibration damping device |
-
2021
- 2021-03-16 CN CN202110282763.XA patent/CN113036983B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207426888U (en) * | 2017-11-29 | 2018-05-29 | 南京越博电驱动系统有限公司 | A kind of permanent magnet synchronous motor of built-in torsional vibration damper |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113036983A (en) | 2021-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113036983B (en) | Brushless DC motor | |
| CN111251889B (en) | Inertia energy feedback device for new energy vehicle and working method | |
| JP5488557B2 (en) | Vibration control device for rotating equipment | |
| CN101345450A (en) | Electric principal shaft with annular permanent magnet vibration damping system | |
| CN209344905U (en) | A kind of low vibration low noise motor | |
| CN111865027A (en) | High-frequency high-rotation-speed swing motor and implementation method thereof | |
| CN1147983C (en) | Shock reducing method for small motor and bearing shock reducing ring thereof | |
| CN112510917A (en) | Gear and rack type electromechanical inertia energy feedback device | |
| CN208971302U (en) | A kind of permanent magnet synchronous servo motor | |
| CN206517203U (en) | Membrane pump DC brushless motor | |
| CN109488152B (en) | Rotary damper and electric putter ware | |
| CN212085971U (en) | Anti-vibration device for three-phase asynchronous motor | |
| CN106602833A (en) | High-frequency vibration motor of electric toothbrush | |
| CN212304893U (en) | Novel miniature multi-pole magnetic suspension motor | |
| CN214837548U (en) | Hydraulic motor generator | |
| CN205092677U (en) | Single -Phase permanent -Magnet motor and actuating mechanism | |
| CN216261792U (en) | Rebound vibration device based on bidirectional coupling force | |
| CN110401280A (en) | A kind of high speed permanent magnet motor rotor with solid magnet steel | |
| CN202183717U (en) | Brushless DC motor | |
| CN210806990U (en) | Brushless DC motor | |
| CN115189539A (en) | Double-rotor switch reluctance type electric wheel | |
| CN216252503U (en) | Radial magnetizing vibration motor | |
| CN220234459U (en) | High-power density multilayer rotor vibration reduction linear motor | |
| CN218587010U (en) | Permanent magnet synchronous motor with rotating shaft capable of being lubricated and cooled | |
| CN220797904U (en) | Wind driven generator rotor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |