CN210578202U

CN210578202U - Voice coil motor with high stability

Info

Publication number: CN210578202U
Application number: CN201922076099.4U
Authority: CN
Inventors: 陈俊峰
Original assignee: Qingdao Micron Automation Co Ltd
Current assignee: Qingdao Micron Automation Co Ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-05-19
Anticipated expiration: 2029-11-27

Abstract

The utility model discloses a voice coil motor that stability is high, include, motor housing and the sealed section of thick bamboo of magnetism, the sealed section of thick bamboo of magnetism sets up in motor housing, the sealed lid of magnetism that magnetism sealed section of thick bamboo upper end opening part was provided with the matching, the fixed magnet that is provided with of the sealed section of thick bamboo inner wall of magnetism, be provided with the cushion chamber in the lateral wall under the motor housing, separate into main cavity and two vice chambeies, two through the baffle in the cushion chamber vice chamber symmetry sets up in the main cavity both sides, and all communicates through logical oil port between two vice chambeies and the main cavity, the main cavity inner wall with vice intracavity wall seals sliding connection respectively has corresponding master piston board and vice piston board. The utility model discloses thereby can effectual solution coil arouse the sealed section of thick bamboo vibration of magnetism to drive the problem of motor housing acutely vibrations around loop bar axial oscillation, improve voice coil motor's stability, can avoid the phenomenon of magnetic leakage to the efficiency of effectual improvement motor work.

Description

Voice coil motor with high stability

Technical Field

The utility model relates to a voice coil motor technical field especially relates to a voice coil motor that stability is high.

Background

The voice coil motor is a special type direct drive motor, has the characteristics of simple structure, small volume, high speed, high acceleration response and the like, and has the working principle that a force is generated when an electrified coil is placed in a magnetic field, and the magnitude of the force is proportional to the current applied to the coil. The motion form of the voice coil motor manufactured based on the principle can be a straight line or a circular arc.

The existing voice coil motor still has some defects when in use, and on one hand, the coil can often generate axial swing when rotating around the loop bar, so that the dynamic stability of the voice coil motor is poor, the axial vibration amplitude is large, and the normal service life of the voice coil motor is influenced. In addition, current voice coil motor has the appearance of magnetic leakage phenomenon when using, and the magnetic field utilization ratio is not high to lead to voice coil motor work efficiency to be lower.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects of poor stability and low working efficiency in the prior art, and providing a voice coil motor with high stability.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a voice coil motor with high stability comprises a motor shell and a magnetic sealing cylinder, wherein the magnetic sealing cylinder is arranged in the motor shell, a matched magnetic sealing cover is arranged at an opening at the upper end of the magnetic sealing cylinder, a magnet is fixedly arranged on the inner wall of the magnetic sealing cylinder, a buffer cavity is arranged in the lower side wall of the motor shell, a main cavity and two auxiliary cavities are separated into the buffer cavity through a partition plate, the two auxiliary cavities are symmetrically arranged at two sides of the main cavity, the two auxiliary cavities are communicated with the main cavity through oil through ports, the inner wall of the main cavity and the inner wall of the auxiliary cavity are respectively connected with a corresponding main piston plate and an auxiliary piston plate in a sealing and sliding manner, a proper amount of hydraulic oil is respectively arranged between the lower side wall of the main piston plate and the lower side wall of the auxiliary piston plate and the lower side wall of the buffer cavity, and the upper side wall of the main piston plate and the upper side, the mobile jib upwards runs through lateral wall and the sealed lateral wall fixed connection of a magnetism barrel down on the cushion chamber, every vice pole also upwards runs through the buffer board that lateral wall fixedly connected with corresponds on the cushion chamber, lateral wall offsets under lateral wall and the sealed barrel of magnetism on the buffer board, the mobile jib with it is equipped with first spring and second spring to overlap respectively on the vice pole, first spring is located under the sealed barrel of magnetism between lateral wall and the motor housing downside inner wall, the second spring is located under the buffer board between lateral wall and the motor housing downside inner wall the voice coil motor can be provided with the chucking device that matches with the sealed lid of magnetism, be provided with driving element in the motor housing, driving element downside wall is provided with the loop bar, the loop bar downwards runs through the sealed pot head of magnetism and is equipped with the coil, the coil matches with magnet and sets up.

Preferably, the clamping device includes two pressure strips, two the pressure strip symmetry sets up at the motor housing inner wall, every equal threaded connection has the clamp bolt that corresponds on the pressure strip, the side wall is provided with the regulation section of thick bamboo under the pressure strip, it is provided with the opening to adjust a section of thick bamboo lower extreme, sliding connection has the elasticity card post in the opening, clamp bolt runs through pressure strip fixedly connected with diaphragm downwards, be provided with the chucking spring under the diaphragm between the side wall and the chucking post side wall.

Preferably, the oil through port is arranged at the lower end of the side wall of the partition plate.

Preferably, the side wall on the buffer plate is provided with a buffer layer with uniform thickness.

Preferably, the first spring and the second spring are both made of manganese steel materials with better extrusion capacity.

The utility model has the advantages that: can effectively solve the problem that the magnetic sealing cylinder vibrates to drive the motor shell to vibrate violently due to the axial swing of the coil around the loop bar, the clamping device is arranged above the magnetic sealing cover, so that on one hand, the clamping degree of the elastic clamping column and the magnetic sealing cover can be correspondingly adjusted according to actual conditions, and on the other hand, the clamping device is matched with the buffer cavity, the main rod and the auxiliary rod which are arranged on the lower side of the magnetic sealing cylinder, the trend of the up-and-down motion of the magnetic sealing cylinder can be effectively weakened, the stability of the voice coil motor is effectively improved, the service life of the voice coil motor is prolonged in a phase-changing manner, certain practicability is achieved, the magnetic sealing shell is sealed by the arrangement of the magnetic sealing cylinder and the magnetic sealing cover, the movable coil and the magnet are in a closed environment, the magnetic leakage phenomenon can be avoided, the utilization rate of a magnetic field is maximized, and therefore the working efficiency of the motor is effectively improved.

Drawings

Fig. 1 is a schematic front structural view of a voice coil motor with high stability according to the present invention;

fig. 2 is an enlarged view of a point a in fig. 1.

In the figure: the device comprises a motor shell 1, a magnetic sealing barrel 2, a magnet 3, a magnetic sealing cover 4, a driving element 5, a loop bar 6, a main cavity 7, a main piston plate 8, an auxiliary cavity 9, an auxiliary piston plate 10, a pressing plate 11, a pressing bolt 12, an adjusting barrel 13, an elastic clamping column 14, a clamping spring 15 and a coil 16.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-2, a voice coil motor with high stability, comprising a motor housing 1 and a magnetic sealing cylinder 2, wherein the magnetic sealing cylinder 2 is arranged in the motor housing 1, an opening at the upper end of the magnetic sealing cylinder 2 is provided with a matched magnetic sealing cover 4, the inner wall of the magnetic sealing cylinder 2 is fixedly provided with a magnet 3, a buffer cavity is arranged in the lower side wall of the motor housing 1, the buffer cavity is divided into a main cavity 7 and two auxiliary cavities 9 by a partition plate, the two auxiliary cavities 9 are symmetrically arranged at two sides of the main cavity 7, the two auxiliary cavities 9 are communicated with the main cavity 7 through oil through ports, the oil through ports are arranged at the lower end of the side wall of the partition plate, so that hydraulic oil overflows through ports when the main piston plate 8 and the auxiliary piston plate 10 start the buffering action during the up-down movement, thereby leading the hydraulic oil to enter the upper parts of the main piston plate 8 and the auxiliary piston plate 10, the inner wall of the main cavity 7 and the inner wall of, a proper amount of hydraulic oil is respectively arranged between the lower side wall of the main piston plate 8 and the lower side wall of the auxiliary piston plate 10 and the lower side inner wall of the buffer cavity, the upper side wall of the main piston plate 8 and the upper side wall of the auxiliary piston plate 10 are respectively and fixedly connected with a main rod and an auxiliary rod, the main rod upwards penetrates through the upper side wall of the buffer cavity and is fixedly connected with the lower side wall of the magnetic sealing cylinder 2, each auxiliary rod also upwards penetrates through the upper side wall of the buffer cavity and is fixedly connected with a corresponding buffer plate, the upper side wall of the buffer plate is abutted against the lower side wall of the magnetic sealing cylinder 2, the upper side wall of the buffer plate is provided with a buffer layer with uniform thickness, the buffer layer can be a rubber pad or a silica gel pad and the like, a first spring and a second spring are respectively sleeved on the main rod and the auxiliary rod, the first spring is arranged between the lower side wall of the magnetic sealing cylinder 2 and the lower side inner wall of the motor shell 1, the manganese steel is good in extrusion capacity and strong in abrasion resistance, the manganese steel is used as a raw material for manufacturing the first spring and the second spring, the service life of the first spring and the service life of the second spring can be prolonged, and the working stability of the voice coil motor is enhanced in a phase change manner.

The voice coil motor can be internally provided with a clamping device matched with the magnetic sealing cover 4, the clamping device is arranged above the magnetic sealing cover 4, on one hand, the clamping degree of the elastic clamping column 14 and the magnetic sealing cover 4 can be correspondingly adjusted according to actual conditions, on the other hand, the clamping device is matched with a buffer cavity arranged at the lower side of the magnetic sealing cylinder 2, a main rod and an auxiliary rod, the trend of the up-and-down movement of the magnetic sealing cylinder 2 can be effectively weakened, the stability of the voice coil motor is effectively improved, the service life of the voice coil motor is improved in a phase-changing manner, the clamping device comprises two pressing plates 11, the two pressing plates 11 are symmetrically arranged on the inner wall of the motor shell 1, each pressing plate 11 is in threaded connection with a corresponding pressing bolt 12, the lower side wall of each pressing plate 11 is provided with an adjusting cylinder 13, the lower end, the clamp bolt 12 runs through 11 fixedly connected with diaphragms of clamp plate downwards, be provided with chucking spring 15 under the diaphragm between lateral wall and the chucking post lateral wall, be provided with drive element 5 in the motor housing 1, this drive element 5 is rotatory servo motor, rotatory servo motor one end fixedly connected with pivot, the pivot outwards runs through motor housing 1 setting, this drive element 5 and coil 16 all are connected with external power supply through the wire, 5 lateral walls are provided with loop bar 6 under the drive element, 4 covers of the sealed lid cover of magnetism are run through downwards to loop bar 6 are equipped with coil 16, coil 16 matches the setting with magnet 3.

In the utility model, at first, the pressing bolt 12 is screwed, because the pressing bolt 12 is in threaded connection with the pressing plate 11, and the elastic clamping column 14 is in sliding connection with the adjusting cylinder 13, along with the tightening of the pressing bolt 12, the transverse plate continuously extrudes the elastic clamping column 14 downwards, the elastic clamping column 14 supports the magnetic sealing cover 4 downwards along with the above, then the coil 16 and the driving element 5 are electrified, the electrified coil 16 axially moves on the loop bar 6, the magnetic sealing cylinder 2 is driven to vibrate along the axial direction, when the magnetic sealing cylinder 2 has the trend of moving downwards, the main piston plate 8 is pushed by the main rod to move downwards in the main cavity 7, thereby the hydraulic oil in the main cavity 7 is pressed into the auxiliary cavity 9, the hydraulic oil in the auxiliary cavity 9 is increased, the auxiliary piston plate 10 drives the auxiliary rod to move upwards along with the auxiliary rod, the buffer plate follows the auxiliary rod to move upwards together, thereby the driving of the downward movement of the magnetic sealing cylinder 2 is offset, the effectual 2 axial vibrations of magnetic seal section of thick bamboo of having eliminated has improved voice coil motor's stability, receives magnetic force axial motion in magnet 3 to coil 16 in addition, belongs to the very ripe prior art of voice coil motor, the utility model discloses in only show its partial structure, the theory of operation does not just have specifically expounded.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a voice coil motor that stability is high, includes, motor housing (1) and magnetic seal section of thick bamboo (2), magnetic seal section of thick bamboo (2) set up in motor housing (1), its characterized in that, magnetic seal section of thick bamboo (2) upper end opening part is provided with the sealed lid of magnetism (4) that match, magnetic seal section of thick bamboo (2) inner wall is fixed and is provided with magnet (3), be provided with the cushion chamber in motor housing (1) side wall, separate into main cavity (7) and two vice chamber (9), two through the baffle in the cushion chamber vice chamber (9) symmetry sets up in main cavity (7) both sides, and all through logical oil port intercommunication between two vice chamber (9) and main cavity (7), main cavity (7) inner wall with vice chamber (9) inner wall seals sliding connection respectively has corresponding master piston board (8) and vice piston board (10), side wall under master piston board (8) with side wall and cushion chamber downside inner wall under vice piston board (10) under side wall Is provided with proper amount of hydraulic oil between them respectively, the lateral wall is respectively fixedly connected with mobile jib and vice pole on master piston board (8) and the lateral wall is respectively gone up to vice piston board (10), the mobile jib upwards runs through buffer chamber upper wall and magnetic seal section of thick bamboo (2) lower lateral wall fixed connection, every vice pole also upwards runs through the buffer chamber upper wall fixedly connected with corresponding buffer board, lateral wall offsets under buffer board upper wall and the magnetic seal section of thick bamboo (2), the mobile jib with overlap respectively on the vice pole and be equipped with first spring and second spring, first spring is located magnetic seal section of thick bamboo (2) between lateral wall and motor housing (1) downside inner wall, the second spring is located between lateral wall and motor housing (1) downside inner wall under the buffer board, the voice coil motor can be provided with the chucking device that matches with magnetic seal lid (4), be provided with driving element (5) in motor housing (1), the magnetic sealing device is characterized in that a loop bar (6) is arranged on the lower side wall of the driving element (5), the loop bar (6) penetrates through the magnetic sealing cover (4) downwards and is provided with a coil (16), and the coil (16) is matched with the magnet (3).

2. The voice coil motor with high stability according to claim 1, wherein the clamping device comprises two pressing plates (11), the two pressing plates (11) are symmetrically arranged on the inner wall of the motor housing (1), each pressing plate (11) is connected with a corresponding pressing bolt (12) in a threaded manner, an adjusting cylinder (13) is arranged on the lower side wall of the pressing plate (11), an opening is formed in the lower end of the adjusting cylinder (13), an elastic clamping column (14) is connected in the opening in a sliding manner, the pressing bolt (12) penetrates through the pressing plate (11) and is fixedly connected with a transverse plate downwards, and a clamping spring (15) is arranged between the lower side wall of the transverse plate and the upper side wall of the clamping column.

3. The voice coil motor with high stability as claimed in claim 2, wherein the oil through hole is formed at a lower end of the sidewall of the diaphragm.

4. A voice coil motor with high stability as claimed in claim 3, wherein the buffer plate is provided with a buffer layer having a uniform thickness on the upper side wall.