CN114204765A - Ultrathin brushless flat vibration motor and implementation method thereof - Google Patents

Ultrathin brushless flat vibration motor and implementation method thereof Download PDF

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Publication number
CN114204765A
CN114204765A CN202111559064.1A CN202111559064A CN114204765A CN 114204765 A CN114204765 A CN 114204765A CN 202111559064 A CN202111559064 A CN 202111559064A CN 114204765 A CN114204765 A CN 114204765A
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CN
China
Prior art keywords
magnetic
magnetic steel
lower bracket
vibration motor
ultra
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.)
Pending
Application number
CN202111559064.1A
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Chinese (zh)
Inventor
何振高
周建平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Dongyang Dongci Chengji Electronics Co Ltd
Original Assignee
Zhejiang Dongyang Dongci Chengji Electronics Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhejiang Dongyang Dongci Chengji Electronics Co Ltd filed Critical Zhejiang Dongyang Dongci Chengji Electronics Co Ltd
Priority to CN202111559064.1A priority Critical patent/CN114204765A/en
Publication of CN114204765A publication Critical patent/CN114204765A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2793—Rotors axially facing stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
    • 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
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/165—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
    • 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
    • H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
    • 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
    • H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
    • H02K7/065—Electromechanical oscillators; Vibrating magnetic drives

Abstract

The invention discloses an ultrathin brushless flat vibration motor, which comprises a lower bracket, wherein a stator assembly is arranged above the lower bracket, a mandrel is arranged on the lower bracket, a rotor assembly is arranged on the mandrel, a shell sleeved outside the rotor assembly is arranged at the upper end of the mandrel, the lower bracket is a magnetic conduction component, and a plurality of hollow grooves corresponding to magnetic poles of magnetic steel are arranged on the lower bracket; the invention also discloses a realization method of the ultrathin brushless flat vibration motor. According to the invention, the lower bracket made of the magnetic conductive material is provided with the plurality of hollow grooves corresponding to the magnetic poles of the magnetic steel, so that the motor can be automatically reset through the structure, the thickness of the lower bracket can be effectively reduced, and the size of the motor is reduced; the invention directly adopts the magnetic steel as the fixing body of the rotor component, and does not need to use structures such as a bracket and the like to fix the magnetic steel and the heavy hammer, so that the structure of the motor is simpler, and the volume of the motor is further reduced while the production cost is reduced.

Description

Ultrathin brushless flat vibration motor and implementation method thereof
Technical Field
The invention belongs to the technical field of brushless flat vibration motors, and particularly relates to an ultrathin brushless flat vibration motor and an implementation method thereof.
Background
A brushless motor is a modern and typical electric integration product, and has advantages of low noise, high energy efficiency, and durability, compared to a conventional brush motor.
The brushless motor generally operates in a self-controlled manner, so that it is generally not necessary to restart the windings on the rotor, as in the case of a synchronous motor started under a heavy load with variable-frequency speed regulation, which means that it is unlikely to oscillate or step out when the load suddenly changes, which is an excellent point of the brushless motor, and is also an important reason for being used by the masses.
However, in order to reduce the number of hall elements and ensure the normal operation of the motor, the brushless flat motor in the prior art needs to be provided with a reset device, and most of the prior reset devices adopt a reset sheet embedded with a magnetic conductive material in a bracket made of a non-magnetic conductive material to realize a reset function, so that the volume of the motor cannot be reduced.
Disclosure of Invention
The present invention is directed to a super thin brushless flat vibration motor to solve the above problems. The ultrathin brushless flat vibration motor has the characteristic of realizing automatic resetting of the motor on the premise of reducing the volume of the motor.
The invention also aims to provide a realization method of the ultrathin brushless flat vibration motor.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an ultra-thin brushless flat vibrating motor, includes the bottom bracket, and the top of bottom bracket is equipped with stator module, is equipped with the dabber on the bottom bracket, is equipped with the rotor subassembly on the dabber, and the upper end of dabber is equipped with the casing of cover in the outside of rotor subassembly, and the bottom bracket is the magnetic conduction component, and the rotor subassembly includes the magnet steel, is equipped with a plurality of fretwork grooves corresponding with the magnetic pole of magnet steel on the bottom bracket.
In order to fix the magnetic steel and the heavy hammer without using a bracket and other structures, the structure of the motor is simpler, the production cost is reduced, the volume of the motor is further reduced, and further, the magnetic steel is of an annular structure. The magnetic steel is connected with the mandrel through a bearing.
In order to support the rotation of the magnetic steel, further, the bearing is a step type oil-containing bearing, and the bearing is connected with the magnetic steel in an interference fit manner.
In order to generate centrifugal force to make the motor vibrate when the rotor assembly rotates, further, the rotor assembly further comprises a heavy hammer which is adhered to the side surface of the magnetic steel close to the shell through laser welding or glue.
In order to facilitate direct assembly with the magnetic steel, the weight of the heavy hammer can be effectively increased, so that effective vibration is ensured, and further, the heavy hammer is of a semicircular annular step structure with the angle less than or equal to 180 degrees.
In order to ensure the gap between the rotor assembly and the casing, further, the side of the bearing close to the casing is higher than the side of the heavy hammer close to the casing.
In order to form an electric field when the motor is powered on, the stator assembly further comprises an FPC board, the FPC board is arranged on the upper surface of the lower bracket, and two symmetrical coils are arranged on the FPC board.
In order to ensure the clearance between the rotor assembly and the stator assembly, a gasket is further arranged on the circumference of the mandrel and is positioned between the bearing and the lower bracket.
Further, the method for implementing the ultra-thin brushless flat vibration motor comprises the following steps:
a plurality of hollow grooves corresponding to the magnetic poles of the magnetic steel are formed in the lower bracket of the magnetic conductive material;
the FPC board is adhered to the upper surface of the lower bracket, forms a circuit with a coil arranged above the FPC board, and forms an electric field when being electrified;
thirdly, the mandrel is connected with the lower bracket in an interference fit manner and used for supporting the rotor assembly and the shell;
fourthly, the magnetic steel is sleeved on the mandrel through a bearing, the magnetic steel provides a driving magnetic field for the motor, and the magnetic field and the electric field interact to drive the rotor assembly to rotate;
and (V) the heavy hammer is arranged on the magnetic steel and forms a rotor assembly with the magnetic steel, and when the rotor assembly rotates, the heavy hammer generates centrifugal force to enable the motor to vibrate.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the lower bracket made of the magnetic conductive material is provided with the plurality of hollow grooves corresponding to the magnetic poles of the magnetic steel, so that the motor can be automatically reset through the structure, the thickness of the lower bracket can be effectively reduced, and the size of the motor is reduced;
2. according to the invention, the magnetic steel is directly adopted as the fixing body of the rotor component and is assembled on the mandrel through the bearing, and the magnetic steel and the heavy hammer are not required to be fixed by using structures such as a bracket and the like, so that the structure of the motor is simpler, the production cost is reduced, and the volume of the motor is further reduced;
3. the heavy hammer is of a semicircular step structure with the angle less than or equal to 180 degrees, so that the weight of the heavy hammer can be effectively increased while the heavy hammer is directly assembled with the magnetic steel, and effective vibration is ensured;
4. the side surface of the bearing close to the shell is higher than the side surface of the heavy hammer close to the shell, so that the gap between the rotor component and the shell is ensured when the motor works.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a rotor assembly according to the present invention;
FIG. 3 is a schematic view of a stator assembly of the present invention;
FIG. 4 is a schematic view of the construction of the lower bracket of the present invention;
FIG. 5 is a schematic diagram of the structure of the weight of the present invention;
FIG. 6 is a schematic view of the construction of the bearing of the present invention;
fig. 7 is a schematic view of magnetizing magnetic steel according to the present invention.
In the figure: 1. a housing; 2. a bearing; 3. a mandrel; 4. a weight; 5. a coil; 6. a gasket; 7. a lower bracket; 71. hollowing out the grooves; 8. an FPC board; 9. magnetic steel; 10. a capacitor; 11. and a control IC.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-7, the present invention provides the following technical solutions: the utility model provides an ultra-thin brushless flat vibrating motor, includes bottom bracket 7, and the top of bottom bracket 7 is equipped with stator module, is equipped with dabber 3 on the bottom bracket 7, is equipped with the rotor subassembly on the dabber 3, and the upper end of dabber 3 is equipped with the cover and is equipped with casing 1 outside the rotor subassembly, and bottom bracket 7 is the magnetic conduction component, preferably low carbon steel material, and the rotor subassembly includes magnet steel 9, is equipped with a plurality of fretwork grooves 71 corresponding with magnet steel 9's magnetic pole on the bottom bracket 7, and bottom bracket 7 adopts stamping forming.
By adopting the technical scheme, the lower bracket 7 made of the magnetic conductive material is provided with the plurality of hollow grooves 71 corresponding to the magnetic poles of the magnetic steel 9, and the magnetic steel 9 is used for attracting the magnetic conductive material, so that the rotor assembly is stopped at a fixed position when the motor stops, and the self-resetting of the motor is realized, thereby ensuring the normal starting and working of the motor. According to the invention, the lower bracket 7 made of the magnetic conductive material is provided with the plurality of hollow grooves 71 corresponding to the magnetic poles of the magnetic steel 9, so that the motor can be automatically reset through the structure, the thickness of the lower bracket 7 can be effectively reduced, and the volume of the motor is reduced.
Specifically, the magnetic steel 9 is of an annular structure, and the magnetic steel 9 is connected with the mandrel 3 through the bearing 2.
Through adopting above-mentioned technical scheme, directly adopt magnet steel 9 as the fixed body of rotor subassembly, assemble on dabber 3 through bearing 2, need not to use structures such as support to fix magnet steel 9 and weight 4, make the structure of motor simpler, in reduction in production cost, further reduced the volume of motor.
Specifically, the bearing 2 is a stepped oil-retaining bearing, and the bearing 2 is connected with the magnetic steel 9 through interference fit.
Through adopting above-mentioned technical scheme, support the rotation of magnet steel 9 through bearing 2.
Specifically, the rotor assembly further includes a weight 4, the weight 4 is bonded to the side surface of the magnetic steel 9 close to the casing 1 by laser welding or glue, and the embodiment is preferably glue bonding.
Through adopting above-mentioned technical scheme, when rotor subassembly rotated, weight 4 produced centrifugal force, made the motor vibration.
Specifically, the weight 4 has a semicircular step structure with an angle less than or equal to 180 degrees.
Through adopting above-mentioned technical scheme, when being convenient for directly assemble with magnet steel 9, can also effectual increase weight 4 to ensure effectual feelings of shaking.
Specifically, stator module includes FPC board 8, and FPC board 8 sets up on the upper surface of lower carriage 7, is equipped with two symmetrical coils 5 on FPC board 8, still is equipped with electric capacity 10 and control IC11 on FPC board 8.
By adopting the technical scheme, the coil 5 and the FPC board 8 form a circuit, and an electric field is formed when the circuit is electrified.
Example 2
The present embodiment is different from embodiment 1 in that: specifically, the side of the bearing 2 close to the housing 1 is higher than the side of the weight 4 close to the housing 1.
Through adopting above-mentioned technical scheme, guarantee the motor at the during operation, clearance between rotor subassembly and the casing 1.
Example 3
The present embodiment is different from embodiment 1 in that: specifically, a gasket 6 is further arranged on the circumference of the mandrel 3, and the gasket 6 is located between the bearing 2 and the lower bracket 7.
Through adopting above-mentioned technical scheme, guarantee the clearance between rotor subassembly and the stator module.
Further, the implementation method of the ultrathin brushless flat vibration motor comprises the following steps:
firstly, a plurality of hollow-out grooves 71 corresponding to the magnetic poles of the magnetic steel 9 are arranged on a lower bracket 7 made of magnetic conductive material;
secondly, the FPC board 8 is adhered to the upper surface of the lower bracket 7, forms a circuit with the coil 5 arranged above the FPC board, and forms an electric field when being electrified;
thirdly, the mandrel 3 is connected with the lower bracket 7 in an interference fit manner and used for supporting the rotor assembly and the machine shell 1;
fourthly, the magnetic steel 9 is sleeved on the mandrel 3 through the bearing 2, the magnetic steel 9 provides a driving magnetic field for the motor, and the magnetic field interacts with the electric field to drive the rotor assembly to rotate;
and (V) the heavy hammer 4 is arranged on the magnetic steel 9 and forms a rotor assembly with the magnetic steel 9, and when the rotor assembly rotates, the heavy hammer 4 generates centrifugal force to enable the motor to vibrate.
In summary, the lower bracket 7 made of the magnetic conductive material is provided with the plurality of hollow-out grooves 71 corresponding to the magnetic poles of the magnetic steel 9, so that the motor can be automatically reset through the structure, the thickness of the lower bracket 7 can be effectively reduced, and the volume of the motor can be reduced; according to the invention, the magnetic steel 9 is directly adopted as a fixing body of the rotor component and is assembled on the core shaft 3 through the bearing 2, and the magnetic steel 9 and the heavy hammer 4 are not required to be fixed by using structures such as a bracket and the like, so that the structure of the motor is simpler, the production cost is reduced, and the volume of the motor is further reduced; the heavy hammer 4 is of a semicircular annular step structure with the angle less than or equal to 180 degrees, so that the weight of the heavy hammer 4 can be effectively increased while the heavy hammer is directly assembled with the magnetic steel 9, and effective vibration is ensured; the side surface of the bearing 2 close to the machine shell 1 is higher than the side surface of the heavy hammer 4 close to the machine shell 1, so that the clearance between the rotor component and the machine shell 1 is ensured when the motor works.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides an ultra-thin brushless flat vibrating motor, includes lower bracket, its characterized in that: the top of bottom bracket is equipped with stator module, is equipped with the dabber on the bottom bracket, is equipped with the rotor subassembly on the dabber, and the upper end of dabber is equipped with the casing of cover in the outside of rotor subassembly, and the bottom bracket is the magnetic conduction component, and the rotor subassembly includes the magnet steel, is equipped with a plurality of fretwork grooves corresponding with the magnetic pole of magnet steel on the bottom bracket.
2. The ultra-thin brushless flat vibration motor according to claim 1, wherein: the magnetic steel is of an annular structure.
3. The ultra-thin brushless flat vibration motor according to claim 1, wherein: the magnetic steel is connected with the mandrel through a bearing.
4. The ultra-thin brushless flat vibration motor according to claim 3, wherein: the bearing is a stepped oil-retaining bearing, and the bearing is connected with the magnetic steel in an interference fit manner.
5. The ultra-thin brushless flat vibration motor according to claim 3, wherein: the rotor assembly further comprises a heavy hammer, and the heavy hammer is bonded on the side face, close to the machine shell, of the magnetic steel through laser welding or glue.
6. The ultra-thin brushless flat vibration motor according to claim 5, wherein: the weight is in a semi-circular step structure with the angle less than or equal to 180 degrees.
7. The ultra-thin brushless flat vibration motor according to claim 5, wherein: the side surface of the bearing close to the shell is higher than the side surface of the heavy hammer close to the shell.
8. The ultra-thin brushless flat vibration motor according to claim 1, wherein: the stator assembly comprises an FPC board, the FPC board is arranged on the upper surface of the lower bracket, and two symmetrical coils are arranged on the FPC board.
9. The ultra-thin brushless flat vibration motor according to claim 3, wherein: and a gasket is also arranged on the circumference of the mandrel and is positioned between the bearing and the lower bracket.
10. A method of implementing an ultra-thin brushless flat vibration motor according to any of claims 1-9, comprising the steps of:
a plurality of hollow grooves corresponding to the magnetic poles of the magnetic steel are formed in the lower bracket of the magnetic conductive material;
the FPC board is adhered to the upper surface of the lower bracket, forms a circuit with a coil arranged above the FPC board, and forms an electric field when being electrified;
thirdly, the mandrel is connected with the lower bracket in an interference fit manner and used for supporting the rotor assembly and the shell;
fourthly, the magnetic steel is sleeved on the mandrel through a bearing, the magnetic steel provides a driving magnetic field for the motor, and the magnetic field and the electric field interact to drive the rotor assembly to rotate;
and (V) the heavy hammer is arranged on the magnetic steel and forms a rotor assembly with the magnetic steel, and when the rotor assembly rotates, the heavy hammer generates centrifugal force to enable the motor to vibrate.
CN202111559064.1A 2021-12-20 2021-12-20 Ultrathin brushless flat vibration motor and implementation method thereof Pending CN114204765A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111559064.1A CN114204765A (en) 2021-12-20 2021-12-20 Ultrathin brushless flat vibration motor and implementation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111559064.1A CN114204765A (en) 2021-12-20 2021-12-20 Ultrathin brushless flat vibration motor and implementation method thereof

Publications (1)

Publication Number Publication Date
CN114204765A true CN114204765A (en) 2022-03-18

Family

ID=80655266

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111559064.1A Pending CN114204765A (en) 2021-12-20 2021-12-20 Ultrathin brushless flat vibration motor and implementation method thereof

Country Status (1)

Country Link
CN (1) CN114204765A (en)

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