CN218387220U

CN218387220U - Rotor subassembly and brushless vibrating motor

Info

Publication number: CN218387220U
Application number: CN202120489778.9U
Authority: CN
Inventors: 何振高; 金志洪
Original assignee: Zhejiang Dongyang Dongci Chengji Electronics Co Ltd
Current assignee: Zhejiang Dongyang Dongci Chengji Electronics Co Ltd
Priority date: 2021-03-08
Filing date: 2021-03-08
Publication date: 2023-01-24
Anticipated expiration: 2031-03-08

Abstract

The utility model discloses a rotor subassembly and brushless vibrating motor relates to brushless motor technical field. This rotor subassembly includes the bearing, the rotor piece, magnet steel and weight, and the periphery of bearing is located to the rotor piece cover, and the rotor piece is located to the magnetic steel bushing, and magnet steel and weight respectively relatively fixed locate the both sides of rotor piece, and the cross sectional shape of weight is L shape, the diapire and the rotor piece butt of weight, the lateral wall of weight and the equal butt of lateral part of magnet steel and rotor piece. The utility model discloses can reduce to the processing of rotor piece, simplify structure and technology, increase the bulk weight of weight, improve the vibration performance of motor, compact structure.

Description

Rotor subassembly and brushless vibrating motor

Technical Field

The utility model relates to a brushless motor technical field especially relates to a rotor subassembly and brushless vibrating motor.

Background

The brushless vibration motor as a vibration generating unit can be installed on mobile phones, game machines, mobile information terminals and other devices to serve as a silent vibration signal to remind users. The brushless vibration motor is a Hall sensor to replace a mechanical commutator, and electronic commutation is carried out by driving an IC to sense the change of magnetic poles, so that the motor works. The brushless vibration motor includes a rotor assembly, a stator assembly, and a housing. The rotor subassembly passes through the bearing and rotationally installs in epaxial, and stator module includes coil winding and FPC subassembly, and coil winding and the equal fixed mounting of FPC subassembly are on the bracket, and when circular telegram to the coil, the rotor subassembly is because of the interact between the electric field that the magnetic field that its inside magnet steel produced and coil winding produced and eccentric rotation to produce the vibration.

The rotor sheet of the rotor assembly is in a step type, a heavy hammer is placed at the bottom of the step, magnetic steel is placed at the high position of the step of the rotor sheet, namely the heavy hammer and the magnetic steel are sequentially placed on the rotor sheet, and the bearing is pressed in the middle of the rotor sheet to realize the rotation of the rotor. However, the existing heavy hammer is limited by the installation space, the volume and the weight are small, the generated vibration quantity is insufficient, the performance of the motor is influenced, and meanwhile, the heavy hammer arranged between the magnetic steel and the rotor sheet can also have certain influence on the magnetic loop.

Accordingly, there is a need for a rotor assembly and a brushless vibration motor to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a stator module and brushless vibrating motor can reduce to the rotor sheet processing, simplify structure and technology, has increased the bulk weight of weight, improves the vibration performance of motor, compact structure.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a rotor subassembly, includes bearing, rotor piece, magnet steel and weight, the rotor piece cover is located the periphery of bearing, the magnet steel cover is located on the rotor piece, just the magnet steel with the weight is respectively the relatively fixed locate the both sides of rotor piece, the shape of cross section of weight is L shape, the diapire of weight with the rotor piece butt, the lateral wall of weight with the magnet steel with the equal butt of lateral part of rotor piece.

Optionally, the outer circumference of the bearing is provided with an annular abutting portion, and the rotor piece abuts against the annular abutting portion.

Optionally, a central hole through which the bearing passes is formed in the middle of the rotor sheet, a flanging is formed in the central hole, and the magnetic steel is sleeved on the flanging.

Optionally, the magnetic steel and the rotor sheet are fixed through UV anaerobic adhesive.

Optionally, the weight is in a semicircular step structure with a central angle less than or equal to 180 °.

Optionally, an end face of one end of the bearing, which is far away from the magnetic steel, is higher than the top face of the weight.

The utility model also provides a brushless vibrating motor, including casing and stator module, brushless vibrating motor still includes as above the rotor subassembly, the casing with stator module fixed connection forms the installation cavity, the rotor subassembly is rotationally located in the installation cavity.

Optionally, stator module includes bracket and pivot, the bracket with casing fixed connection forms the installation cavity, the pivot with the bracket with the equal fixed connection of casing, the bearing housing is located the periphery of pivot just the bearing is kept away from the one end of magnet steel with the casing butt.

Optionally, stator module still includes the board that resets, be equipped with the mounting groove on the bracket, the board that resets install in the mounting groove, the board that resets is made by soft magnetic material, the board that resets includes the unequal base plate that resets of a plurality of sizes, and is a plurality of the base plate that resets is followed the circumference of bracket distributes, every adjacent two equal contained angle setting between the base plate that resets for make the rotor subassembly end stop at preset position.

Optionally, the reset plate includes three large, medium and small fan-shaped reset substrates, an included angle α of a fan-shaped region of the smallest reset substrate is 50 ° to 55 °, an included angle β of a fan-shaped region of the largest reset substrate is 75 ° to 80 °, and an included angle γ of a fan-shaped region of the last reset substrate is 60 ° to 65 °.

The utility model has the advantages that:

1. the magnetic steel and the heavy hammer are respectively and relatively fixed on two sides of the rotor sheet, so that the machining of the rotor sheet is reduced, the structure and the process are simplified, and meanwhile, the installation limitation of the heavy hammer is reduced.

2. The rotor sheets are directly connected with the magnetic steel, so that the rotor sheets directly form a magnetic loop, the problem of air gap loss of a magnetic field is solved, and the performance of the vibration motor is improved.

3. Further be the L shape with the cross sectional shape of weight, the diapire and the rotor piece butt of weight, the equal butt of lateral part of the lateral wall of weight and magnet steel and rotor piece have both increased the volume weight of weight, improve the vibration performance of motor, make whole rotor subassembly compact structure again.

Drawings

Fig. 1 is a schematic view of an overall structure of a rotor assembly provided by an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a bearing in a rotor assembly provided by an embodiment of the present invention;

fig. 3 is a schematic structural diagram of the rotor sheet and the magnetic steel in the rotor assembly provided by the embodiment of the present invention;

FIG. 4 is a schematic diagram of a weight in a rotor assembly according to an embodiment of the present invention;

fig. 5 is a schematic view of an overall structure of a brushless vibration motor according to an embodiment of the present invention;

fig. 6 is a schematic view of an overall structure of a stator assembly provided by an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a bracket in a stator assembly according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a reset plate in a stator assembly provided by an embodiment of the present invention.

In the figure:

1. a bearing; 11. an annular abutment; 2. a rotor sheet; 21. a central bore; 22. flanging; 3. magnetic steel; 4. a weight;

10. a housing; 20. a stator assembly; 201. a mounting cavity; 202. a bracket; 2021. mounting grooves; 203. a rotating shaft; 204. a reset plate; 2041. resetting the substrate; 205. an FPC assembly; 206. a coil; 30. and (6) a gasket.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

The present embodiment discloses a rotor assembly, as shown in fig. 1-4, the rotor assembly includes a bearing 1, a rotor plate 2, a magnetic steel 3 and a weight 4, the rotor plate 2 is sleeved on the periphery of the bearing 1, the magnetic steel 3 is sleeved on the rotor plate 2, and the magnetic steel 3 and the weight 4 are respectively and relatively fixed on two sides of the rotor plate 2, the cross-sectional shape of the weight 4 is L-shaped, the bottom wall of the weight 4 is abutted to the rotor plate 2, and the side wall of the weight 4 is abutted to both sides of the magnetic steel 3 and the rotor plate 2.

The utility model discloses a with magnet steel 3 and weight 4 respectively relatively fixed locate rotor piece 2's both sides, reduce to rotor piece 2 processing, simplify structure and technology, reduce weight 4's installation restriction simultaneously.

The rotor sheet 2 and the magnetic steel 3 are directly connected, so that the rotor sheet 2 directly forms a magnetic loop, the problem of magnetic field air gap loss is solved, and the performance of the vibration motor is improved.

Further be L shape with the cross sectional shape of weight 4, the diapire of weight 4 and rotor piece 2 butt, the lateral wall of weight 4 and magnet steel 3 and the equal butt of lateral part of rotor piece 2 have both increased the volume weight of weight 4, improve the vibration performance of motor, make whole rotor subassembly compact structure again.

Optionally, the bearing 1 is an oil bearing. The periphery of the bearing 1 is provided with an annular abutting part 11 for limiting and abutting the axial direction of the rotor sheet 2, so that the rotor sheet 2 is prevented from moving axially during rotation.

Further, the rotor sheet 2 is formed by magnetic low-carbon steel. The rotor piece 2 abuts against the annular abutting portion 11, so that the pulling-out force of the bearing 1 and the rotor piece 2 is guaranteed, and the stability of installation of the rotor assembly is guaranteed. The middle part of the rotor sheet 2 is provided with a central hole 21 for the bearing 1 to penetrate through, and a flanging 22 is arranged at the central hole 21 so as to facilitate the installation of the magnetic steel 3 and the bearing 1. The bearing 1 is press-fitted in the central hole 21 and the turned-over edge 22 of the rotor sheet 2 by interference fit.

The magnetic steel 3 is sleeved on the flanging 22 to realize fixation. The magnetic steel 3 is made of high-performance materials such as neodymium, iron, boron and the like, and the magnetic steel 3 is magnetized in multiple axial poles, and gaps between the magnetic poles are controlled and guaranteed, so that magnetic field loss is reduced. Further, magnet steel 3 and rotor piece 2 one side full face contact to fix through UV anaerobism glue, with the loss that reduces the magnetic circuit.

In this embodiment, the weight 4 is fixed on one side of the rotor plate 2 by laser welding or glue to perform the eccentric rotation. Specifically, the weight 4 has a semicircular step structure with a central angle less than or equal to 180 ° to increase the weight of the weight 4 and increase the vibration amount. The end face of the bearing 1 far from the end of the magnetic steel 3 is higher than the top face of the heavy hammer 4, so as to ensure the gap between the heavy hammer 4 and the casing 10 when the rotor assembly works, and avoid blocking the rotation of the heavy hammer 4.

The embodiment further discloses a brushless vibration motor, which comprises a casing 10 and a stator assembly 20, and the brushless vibration motor further comprises a rotor assembly as described above, the casing 10 and the stator assembly 20 are fixedly connected to form an installation cavity 201, and the rotor assembly is rotatably arranged in the installation cavity 201.

Optionally, the stator assembly 20 includes a bracket 202 and a rotating shaft 203, the bracket 202 is fixedly connected with the casing 10 to form an installation cavity 201, the rotating shaft 203 is fixedly connected with both the bracket 202 and the casing 10, and the bearing 1 is sleeved on the periphery of the rotating shaft 203 and one end of the bearing 1, which is far away from the magnetic steel 3, is abutted against the casing 10. The carrier 202 is formed from a non-magnetically conductive material.

Optionally, the brushless vibration motor further includes a gasket 30, the gasket 30 is fixedly sleeved on the periphery of the rotating shaft 203, and the stator assembly 20 and the rotor assembly are respectively located at two ends of the gasket 30 to ensure a gap between the rotor assembly and the stator assembly 20.

Further, the stator assembly 20 further includes a reset plate 204, the bracket 202 is provided with a mounting groove 2021, the reset plate 204 is mounted in the mounting groove 2021, the reset plate 204 is made of soft magnetic material, the reset plate 204 includes a plurality of reset base plates 2041 with different sizes, the reset base plates 2041 are circumferentially distributed along the bracket 202, and an equal included angle is formed between every two adjacent reset base plates 2041, so that the rotor assembly stops at a preset position.

Because the reset plate 204 is made of soft magnetic material, the bracket 202 is formed by non-magnetic material, the magnetic steel 3 can not be attracted, and the attraction force between the reset block of high magnetic conductive alloy and the magnetic steel 3 is larger, so that the rotor assembly is stopped at a preset position, the resistance of the rotor when the motor is started is reduced, and the problem of a starting dead point is solved. Further install the board that resets 204 in the mounting groove 2021 of bracket 202 both spacing the installation of the board 204 that resets, improve installation stability, can reduce again that the board 204 that resets occupies the inner space of motor, do not influence the outward appearance of motor.

The reset plate 204 specifically includes a plurality of reset substrates 2041 with different sizes, which facilitates the distinguishing during installation, so as to install the reset substrates 2041 with corresponding sizes to the corresponding installation grooves 2021, thereby improving the installation efficiency.

Optionally, the reset plate 204 includes three large, medium and small fan-shaped reset substrates 2041, an included angle α of a fan-shaped region of the smallest reset substrate 2041 is 50 ° to 55 °, an included angle β of a fan-shaped region of the largest reset substrate 2041 is 75 ° to 80 °, and an included angle γ of a fan-shaped region of the last reset substrate 2041 is 60 ° to 65 °.

Exemplarily, the following steps are carried out: alpha is 55 degrees, beta is 75 degrees and gamma is 65 degrees. The reset board 204 can be mounted by mounting the reset substrate 2041 with different sizes into the corresponding mounting groove 2021 during mounting, so that the mounting efficiency is improved. In other embodiments, the values of α, β, and γ may be set as needed, and are not limited to this embodiment.

Of course, the stator assembly 20 further includes the FPC assembly 205, the coil 206, and the like to ensure the normal operation of the motor, and since the structures of the FPC assembly 205, the coil 206, and the like are the prior art, they will not be described herein again.

It should be noted that the preset position described in this embodiment is a position where the magnetic field center of the coil 206 and the magnetic pole center of the magnetic steel 3 are not zero.

To sum up, the embodiment of the utility model provides a rotor subassembly and brushless vibrating motor possess following advantage:

1. the magnetic steel 3 and the heavy hammer 4 are respectively and relatively fixed on two sides of the rotor sheet 2, so that the machining of the rotor sheet 2 is reduced, the structure and the process are simplified, and meanwhile, the installation limitation of the heavy hammer 4 is reduced.

2. The rotor sheet 2 and the magnetic steel 3 are directly connected, so that the rotor sheet 2 directly forms a magnetic loop, the problem of magnetic field air gap loss is solved, and the performance of the vibration motor is improved.

3. Further be L shape with the cross sectional shape of weight 4, the diapire of weight 4 and rotor piece 2 butt, the lateral wall of weight 4 and magnet steel 3 and the equal butt of lateral part of rotor piece 2 have both increased the volume weight of weight 4, improve the vibration performance of motor, make whole rotor subassembly compact structure again.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a rotor subassembly, its characterized in that includes bearing (1), rotor piece (2), magnet steel (3) and weight (4), rotor piece (2) cover is located the periphery of bearing (1), magnet steel (3) cover is located on rotor piece (2), just magnet steel (3) with weight (4) relatively fixed respectively locate the both sides of rotor piece (2), the shape of cross section of weight (4) is L shape, the diapire of weight (4) with rotor piece (2) butt, the lateral wall of weight (4) with magnet steel (3) with the equal butt of lateral part of rotor piece (2).

2. The rotor assembly according to claim 1, characterized in that the outer circumference of the bearing (1) is provided with an annular abutment (11), the rotor sheet (2) abutting against the annular abutment (11).

3. The rotor assembly according to claim 1, wherein a central hole (21) for the bearing (1) to penetrate is formed in the middle of the rotor sheet (2), a flanging (22) is formed at the central hole (21), and the magnetic steel (3) is sleeved on the flanging (22).

4. The rotor assembly according to claim 1, wherein the magnetic steel (3) and the rotor sheet (2) are fixed by UV anaerobic adhesive.

5. The rotor assembly according to claim 1, wherein the weight (4) has a semicircular step structure with a central angle less than or equal to 180 °.

6. The rotor assembly according to claim 1, wherein the end surface of the bearing (1) far away from the end of the magnetic steel (3) is higher than the top surface of the heavy hammer (4).

7. A brushless vibration motor comprising a casing (10) and a stator assembly (20), wherein the brushless vibration motor further comprises a rotor assembly according to any one of claims 1-6, the casing (10) and the stator assembly (20) being fixedly connected to form a mounting cavity (201), and the rotor assembly being rotatably disposed in the mounting cavity (201).

8. The brushless vibration motor according to claim 7, wherein the stator assembly (20) comprises a bracket (202) and a rotating shaft (203), the bracket (202) is fixedly connected with the housing (10) to form the mounting cavity (201), the rotating shaft (203) is fixedly connected with both the bracket (202) and the housing (10), the bearing (1) is sleeved on the periphery of the rotating shaft (203), and one end of the bearing (1) away from the magnetic steel (3) abuts against the housing (10).

9. The brushless vibration motor of claim 8, wherein the stator assembly (20) further comprises a reset plate (204), the bracket (202) is provided with a mounting groove (2021), the reset plate (204) is mounted in the mounting groove (2021), the reset plate (204) is made of a soft magnetic material, the reset plate (204) comprises a plurality of reset substrates (2041) with different sizes, the reset substrates (2041) are distributed along the circumferential direction of the bracket (202), and an equal included angle is formed between every two adjacent reset substrates (2041) for stopping the rotor assembly at a predetermined position.

10. The brushless vibration motor according to claim 9, wherein the reset plate (204) includes three large, medium and small sector-shaped reset substrates (2041), an included angle α of a sector-shaped region of the smallest reset substrate (2041) is 50 ° to 55 °, an included angle β of a sector-shaped region of the largest reset substrate (2041) is 75 ° to 80 °, and an included angle γ of a sector-shaped region of the last reset substrate (2041) is 60 ° to 65 °.