CN216121959U - Mover assembly structure - Google Patents

Abstract

The utility model discloses a rotor assembly structure, which belongs to the field of miniature vibration motors and comprises a positioning sheet, a spring, a fixing block, magnetic conductive plates, magnetic steels and a shaft lever, wherein the positioning sheet, the spring, the fixing block and the magnetic conductive plates which correspond to each other in a mirror image manner and are sequentially distributed from outside to inside are respectively sleeved at two axial ends of the shaft lever, and the magnetic steels are arranged on the shaft lever and between the two magnetic conductive plates. This move subassembly structure adopts from taking spring traction damping and electromagnetism damping structure for the product can stop fast at the damping after the outage, thereby the fast stop of product can let the product vibration experience effect promote by a wide margin.

Description

Mover assembly structure

Technical Field

The utility model belongs to the technical field of miniature vibration motors and provides a rotor assembly structure.

Background

With the development of electronic technology, portable consumer electronic products are more and more sought after by people, such as mobile phones, handheld game consoles, navigation devices or handheld multimedia entertainment devices, and the like, generally use vibration motors to perform system feedback, such as incoming call prompt, information prompt, navigation prompt, vibration feedback of game consoles, and the like. Such a wide application requires a vibration motor having high performance and long service life. The mode of traditional vibrating motor realization vibration feedback is through rotor motor plus eccentric weight, promptly: when the motor rotates, the rotor drives the eccentric weight to rotate, and the centrifugal force generated by the rotating eccentric weight is transferred to the carrier to generate the vibration feeling sensed by people; however, the vibration motor of this structure exists: the rotor motor is provided with a bearing and shaft structure, and a shaft and the bearing rub when rotating, so that abrasion exists for a long time, the service life is influenced, and certain friction noise is brought; 4) after the rotor motor stops supplying power, the motor stops for a long time under the action of inertia, and vibration experience is influenced. Therefore, it is necessary to provide a new mover assembly to meet the requirements of the vibration motor.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a mover assembly structure, which can reduce radial vibration when a product moves in an axial direction, and prevent generation of collision friction sound, so as to improve product reliability.

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

the utility model provides a rotor assembly structure, wherein a rotor assembly comprises a positioning piece, a spring, a fixing block, magnetic conductive plates, magnetic steel and a shaft rod, the positioning piece, the spring, the fixing block and the magnetic conductive plates which correspond to each other in a mirror image mode and are sequentially distributed from outside to inside are respectively sleeved at two axial ends of the shaft rod, and the magnetic steel is arranged on the shaft rod and between the two magnetic conductive plates.

Furthermore, the fixed block is provided with an inner positioning boss for limiting the spring between the fixed block and the positioning piece on one side facing the positioning piece.

Further, the spring is composed of an inner ring plate, three elastic ribs and an outer ring plate, the three elastic ribs are arranged between the inner ring plate and the outer ring plate, and a central hole through which the shaft rod penetrates is formed in the inner ring plate.

Furthermore, an inner positioning groove matched with an inner positioning boss arranged on the fixing block is arranged on the inner ring plate.

Further, an outer positioning groove is arranged on the outer ring plate.

The utility model has the beneficial effects that:

1. this move subassembly structure adopts from taking spring traction damping and electromagnetism damping structure for the product can stop fast at the damping after the outage, thereby the fast stop of product can let the product vibration experience effect promote by a wide margin.

2. The movable assembly structure adopts a double-spring movable assembly structure, and an upper spring and a lower spring are designed, so that radial vibration of a product can be reduced during axial movement, collision friction sound is prevented from being generated, and the reliability of the product is improved; the spring adopts a three-elastic-rib structure with positioning mechanisms on the inner and outer diameters, the rotor can move along the axial direction most stably through the three elastic ribs, and the inner diameter and the outer diameter of the spring are provided with three positioning positions, so that the spring can be well positioned and various precision sizes can be ensured during assembly.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the utility model, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is an exploded view of a mover assembly according to the present invention;

FIG. 2 is a schematic diagram of a planar spring structure of the mover assembly of the present invention;

FIG. 3 is an exploded view of the rotor assembly of the present invention;

FIG. 4 is an assembled half-section view of a mover assembly application of the present invention;

reference numerals: the stator assembly comprises a shell 1, a stator assembly 2, a rotor assembly 3 and an end cover 4; a magnetic frame 21, a wire frame 22, a coil 23 and a square needle 24; an outer positioning boss 221; the positioning plate 31, the spring 32, the fixed block 33, the magnetic conduction plate 34, the magnetic steel 35 and the shaft lever 36; an inner ring plate 321, three elastic ribs 322, an outer ring plate 323, an outer positioning groove 324, an inner positioning groove 325 and a central hole 326; an inner positioning boss 331.

Detailed Description

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

As shown in fig. 1-2, in the mover assembly structure of this embodiment, the mover assembly 3 is a moving part of the vibration motor, the mover assembly 3 is composed of a positioning plate 31, a spring 32, a fixing block 33, magnetic conductive plates 34, magnetic steel 35, and a shaft lever 36, the positioning plate 31, the spring 32, the fixing block 33, and the magnetic conductive plates 34 are respectively sleeved at two axial ends of the shaft lever 36, and the positioning plate 31, the spring 32, the fixing block 33, and the magnetic conductive plates 34 are respectively in mirror image correspondence and sequentially distributed from outside to inside, and the magnetic steel 35 is disposed on the shaft lever 36 and between the two magnetic conductive plates 34. Thus, the shaft lever is assembled in the middle hole of the magnetic conductive plate 34, the middle hole of the magnetic steel 35 is sleeved in and fixed with the shaft lever 36, the two magnetic conductive plates 34 are assembled with the shaft lever 36 through respective middle holes, the two fixing blocks 33 are respectively installed at two ends of the shaft lever 36, the two springs 32 are respectively installed at two ends of the two fixing blocks 33, the two positioning pieces 31 are respectively installed on the two springs 32, and all materials are fixed into the mover assembly 3 into a whole by riveting the positioning pieces 31, the fixing blocks 33 and the shaft lever 36; therefore, the shaft rod plays a role in connection and support, all materials for connecting the rotor assemblies form the rotor assemblies, and the shaft rod penetrates through the materials on all the rotor assemblies, so that the concentricity of the product can be well guaranteed; the magnetic steel is a permanent magnet and generates a permanent magnetic field which interacts with an electromagnetic field generated by the stator assembly; the magnetic conduction plate changes the magnetic force line generated by the permanent magnet, and improves the utilization rate and the utilization position of the magnetic field; the fixed block is used for connecting the fixed shaft, the spring and the positioning sheet; the spring pulls the mover assembly to make reciprocating motion, it is made up of inner race plate 321, three elastic ribs 322 and outer race plate 323, set up three elastic ribs between outer race plate and the inner race plate, set up the centre hole 326 that the axostylus axostyle runs through on the inner race plate, and there are outer positioning grooves 324 that the outer positioning boss 221 that is set up on the bobbin 22 of the stator module 2 on the outer race plate 323 is adapted, and there are inner positioning grooves 325 that are adapted with inner positioning boss 331 that is set up on the fixed block 33 on the inner race plate 321; the locating plate is used for fixing the spring and the fixing block. The fixed block, spring realize the circumference location through the spacer that sets up on these two materials, and fixed block, spring, spacer three set up interior location boss 331 on the fixed block through the riveting promptly for the three compresses tightly fully fixedly. The inner ring plate of the spring is pressed and fixed with the fixed block by the positioning sheet, the outer ring plate of the spring is pressed and fixed with the inner concave table (not marked) in the shell 1 or the end cover 4 by the coil frame 22 of the stator component 2, and the power component 3 vibrates in the axial direction through the three elastic ribs 322 of the spring 32.

Specifically, the permanent magnet on the rotor assembly 3 generates a permanent magnetic field, and interacts with an excited electromagnetic field on the stator assembly 2, so that the rotor assembly 3 moves towards one direction, and when the rotor assembly 3 moves to a certain amplitude, the magnetic field on the stator assembly 2 switches directions, so that the rotor assembly 3 is stressed towards the opposite direction and moves towards the opposite direction under the traction of the spring 32, and the driving power supply is switched repeatedly in such a way, so that the rotor assembly 3 moves repeatedly; when the frequency of the switching power source coincides with the natural frequency of the spring 32, the resonance point of the vibration motor, that is, the maximum vibration amount is reached.

Referring to fig. 3-4, the vibration motor using the present mover assembly 3 further includes a housing 1, a stator assembly 2, and an end cap 4, wherein the housing 1 is connected to the end cap 4, the stator assembly 2 is fixed between the housing 1 and the end cap 4, the mover assembly 3 is of a dual-spring structure and is disposed in the stator assembly 2 and has an axial amplitude relative to the stator assembly 2, and two springs 32 respectively fixed to two axial ends of the mover assembly between two axial ends of the stator assembly 2 and the housing 1 and the end cap 4.

Specifically, the shell 1 is used as an exterior support, and other components are assembled in the shell or connected with the shell; the end cover 4 is used as a fixed support, after the stator assembly 2 and the rotor assembly 3 are arranged in the shell 1, the end cover 4 is covered, and the end cover 4 and the shell 1 are fixed through hot riveting, so that the stator assembly 2 and the rotor assembly 3 are fully restricted in the shell 1; and the open end (towards end cover one end) section of thick bamboo wall of shell 1 is equipped with axially extended breach (unmarked) for cause the interference when avoiding installing stator module 2, corresponding end cover 4 then towards shell 1 the corresponding side be equipped with shell 1 on the riser (unmarked) of the breach looks adaptation that establishes, and the riser leaves certain interval with the breach top, play the maximum effect of closing.

The stator assembly 2 is an excitation source of the vibration motor and belongs to a fixed state, when an external power supply supplies power to the coil, the coil generates electromagnetic force and interacts with a permanent magnet magnetic field on the rotor assembly 3, so that a product moves; specifically, the stator assembly 2 is composed of a magnetic frame 21, a bobbin 22, a coil 23 and a square needle 24; the square needle 24 is fixed by interference fit with a pinhole arranged on the wire frame 22, the square needle 24 is inserted into the wire frame 22, then the enameled wire is wound on the wire frame 22 to form a coil 23, and then the magnetic frame 21 is sleeved outside the coil 23. Thus, the magnetic frame 21 is sleeved outside the coil 23, when the coil 23 is electrified to generate a magnetic field, the magnetic frame 21 restrains the magnetic lines of force to be dispersed outwards, the magnetic flux leakage of a product is reduced, and the utilization rate of the magnetic field of the coil is improved; the wire frame 22 mainly plays a role in connection and support, is integrally formed through an injection mold, saves processing cost and material cost, and is provided with an outer positioning boss 221, a wire slot, a needle hole and the like, wherein the outer positioning bosses 221 at two ends of the wire frame 22 are used for positioning an outer ring plate 323 of a spring 32 of the rotor assembly 3; two winding slots are used for winding enameled wires to form a coil 23; the middle partition is provided with a needle hole for mounting the square needle 24 and is used for assembling the square needle 24; the magnetic frame is in a semi-closed shape, so that the magnetic frame can be conveniently sleeved outside the coil; the square needles 24 are assembled on the wire frame 22 and are arranged in three numbers, two square needles 24 on two sides are used for binding the initial end and the terminal end of the coil 23, and the middle square needle 24 is used for adjusting the winding direction; the coil 23 is wound on the bobbin 22, and the thread ends are bound on the square needles 24 at two sides, which are the excitation source of the motor, when the external power supply supplies power to the coil 23, the coil 23 generates electromagnetic force to interact with the magnetic field of the permanent magnet on the mover assembly 3, so that the product moves.

The working principle of the vibration motor applying the dynamic subassembly in vibration feedback is as follows: when the square needle 24 of the stator component 2 supplies current, the coil 23 on the stator component 2 generates an electromagnetic field, the generated electromagnetic field interacts with a permanent magnetic field generated by the magnetic steel 35 on the rotor component 3, the rotor component 3 is pushed by axial force to move towards the axial direction through the spring 32, when the rotor component 3 moves to a certain amplitude, the current direction is changed, the stress direction of the rotor component 3 is opposite, the rotor component 3 moves towards the opposite direction of the axial direction, the switching is repeated, the rotor component 3 repeatedly reciprocates along the axial direction under the traction of the spring 32, when the current direction switching frequency is consistent with the inherent frequency of the spring 32, the maximum amplitude of the repeated movement of the rotor component 3 is reached, and the product output is large vibration quantity.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.

Claims (5)

1. The rotor component structure is characterized in that the rotor component (3) comprises a positioning piece (31), a spring (32), a fixing block (33), magnetic conductive plates (34), magnetic steel (35) and a shaft lever (36), the positioning piece, the spring, the fixing block and the magnetic conductive plates are respectively sleeved at two axial ends of the shaft lever, mirror images of the positioning piece, the spring, the fixing block and the magnetic conductive plates are corresponding to each other and are distributed in sequence from outside to inside, and the magnetic steel is arranged on the shaft lever and located between the two magnetic conductive plates.

2. The mover assembly structure as claimed in claim 1, wherein the fixing block is provided at a side facing the positioning plate with an inner positioning boss (331) defining a spring therebetween.

3. The mover assembly structure of claim 2, wherein the spring is composed of an inner ring plate (321), three elastic ribs (322) and an outer ring plate (323), the three elastic ribs are arranged between the inner ring plate and the outer ring plate, and a central hole (326) through which the shaft rod passes is arranged on the inner ring plate.

4. The rotor assembly structure of claim 3, wherein the inner ring plate is provided with an inner positioning groove (325) matched with an inner positioning boss arranged on the fixing block.

5. The mover assembly structure according to claim 3, wherein the outer race plate is provided with an outer positioning groove (324).

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