CN209948803U - Coreless brushless motor and test board thereof - Google Patents

Abstract

The utility model provides a no iron core brushless motor and testboard thereof, relates to motor structure technical field, and it is poor to have solved the heat dissipation that current motor exists, and the cost that the consumption of easy-to-wear part leads to is big to and the fixed unable problem of timing in clearance between rotor and the stator. The coreless brushless motor comprises a stator assembly and a rotor assembly, wherein the rotor assembly and the stator assembly are arranged on the same central axis, the stator assembly comprises a stator disc, a plurality of windings arranged in the stator disc and a stator disc cover plate for packaging the windings, a plurality of through holes are formed in the stator disc and the stator disc cover plate, and the rotor assembly comprises a rotor disc, a plurality of magnetic steel sheets and a main shaft penetrating through the rotor disc and the magnetic steel sheets. A test bench comprises a base, a first test seat fixed on the base and a second test seat in sliding connection with the base, wherein the second test seat slides on the base through a screw rod assembly arranged on the base.

Description

Coreless brushless motor and test board thereof

Technical Field

The utility model relates to a motor structure technical field, especially a no iron core brushless motor and testboard thereof.

Background

Traditional motor, its stator and rotor are constituteed integratively, still are equipped with parts such as carbon brush, fan blade, please see utility model patent: a disc type coreless motor [ CN201520532194.X ], comprises a ring-shaped magnet, a disc-shaped rotor, a front cover and a rear cover, wherein the front cover and the rear cover are provided with inner concave cavities, the ring-shaped magnet is sleeved outside the disc-shaped rotor and fixed in the inner concave cavities of the front cover, the disc-shaped rotor is fixed between the front cover and the rear cover, a gasket for fixing a permanent carbon brush and a motor lead is riveted on the rear cover, the carbon brush is embedded and fixed on the gasket permanently, one end of the permanent carbon brush is attached to the disc-shaped rotor, the other end of the permanent carbon brush is connected with the motor lead, and the motor lead extends out of the rear cover after the gasket is wound.

This technical scheme has the advantages of simplifying mechanical structure, conveniently fixing the carbon brush, reducing self size, still has the motor and generates heat the back heat dissipation difficulty, has that wearing parts such as carbon brush are with high costs of replacement to and can't carry out the timing so that it obtains the problem of the moment of torsion that suits to the clearance between rotor and the stator.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a coreless brushless motor and a test board thereof, which can solve the above technical problems.

A brushless motor without an iron core comprises a stator assembly and a rotor assembly, wherein the rotor assembly is arranged with the stator assembly along the same central axis, the stator assembly comprises a stator disc, a plurality of windings arranged in the stator disc and a stator disc cover plate used for packaging the windings in the stator disc, a plurality of through holes are correspondingly formed in the stator disc and the stator disc cover plate, the rotor assembly comprises a rotor disc, a plurality of magnetic steel sheets arranged between the rotor disc and the stator assembly and a main shaft which penetrates through the rotor disc and the magnetic steel sheets and is fixedly connected with the rotor disc, and a magnetic field is generated after the stator assembly is electrified to drive the rotor assembly to rotate.

Furthermore, a plurality of triangular fixing pieces are arranged in the stator disc, each triangular fixing piece is wound with a winding, a positioning hole is formed in each triangular fixing piece, a hole groove is formed in each positioning hole on the stator disc cover plate, each through hole is formed between every two adjacent hole grooves, and a rivet sequentially penetrates through the hole grooves and the positioning holes and is fixed with the stator disc.

Further, the quantity of triangle mounting is 6, and adjacent two the contained angle between the triangle mounting is 60 degrees.

Furthermore, a flame-retardant layer is arranged between the triangular fixing piece and the stator disc cover plate.

Furthermore, a platform stage is arranged on the inner wall of the stator disc, and the stator disc cover plate is fixed on the platform stage.

Furthermore, one side of the rotor disc, which faces the stator assembly, is provided with a containing groove, and the magnetic steel sheet is fixed in the containing groove through glue.

Further, the main shaft and the rotor disc are connected by a spline.

Further, the number of the magnetic steel sheets is one of 2, 4, 6 or 8.

The utility model provides a testboard for test foretell coreless brushless motor, the testboard includes a frame, and one is fixed last first test seat of frame, one with first test seat level set up and with frame sliding connection's second test seat, be equipped with a lead screw subassembly on the frame horizontal direction, the second test seat with the lead screw subassembly is connected, be equipped with a stator fixing base on the first test seat, be equipped with a rotor fixing base on the second test seat, stator module fixes on the stator fixing base, the main shaft of rotor module is kept away from stator module's one end is passed the rotor fixing base is connected with second test seat bearing.

Furthermore, a distance sensor is also arranged on the second test seat.

Compared with the prior art, the utility model provides a no iron core brushless motor, through having seted up a plurality of through-holes on stator disc and stator disc apron correspondingly, and set up in the rotor dish with a plurality of magnetic steel sheets between the stator module produce magnetic field and drive after the stator module circular telegram rotor subassembly pivoted in-process reaches good heat dissipation to the cost has been saved to structural easy wearing parts such as not setting up the carbon brush. A test bench utilizes the high precision of a screw rod component through a first test seat fixed on a base and a second test seat driven by the screw rod component to rotate, and can effectively measure and calibrate the gap between a rotor component and a stator component to meet the requirement.

Drawings

Embodiments of the present invention are described below with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of a coreless brushless motor provided by the present invention.

Fig. 2 is an exploded view of the coreless brushless motor of fig. 1.

Fig. 3 is a schematic structural diagram of a test bench for testing the coreless brushless motor of fig. 1.

Detailed Description

The following describes in further detail specific embodiments of the present invention based on the drawings. It should be understood that the description herein of embodiments of the invention is not intended to limit the scope of the invention.

Please refer to fig. 1 and fig. 2, which are schematic structural diagrams of a coreless brushless motor according to the present invention. The ironless brushless motor includes a stator assembly 11, and a rotor assembly 12 disposed coaxially with the stator assembly 11. The stator assembly 11 and the rotor assembly 12 are circular structures, and the ironless brushless motor should further include other functional modules, such as power supply components, electrical components, connecting components, mounting components, and the like, which should be well known to those skilled in the art, and thus will not be described in detail herein.

The stator assembly 11 includes a stator plate 111, a plurality of windings 112 disposed in the stator plate 111, and a stator plate cover plate 113 for enclosing the windings 112 in the stator plate 111. Be equipped with a plurality of triangle mounting 116 in the stator disc 111, every the winding 112 is equipped with on the triangle mounting 116, the quantity of triangle mounting 116 is 6, and the contained angle between two adjacent triangle mountings is 60 degrees, make full use of stator disc 111's space, and is adjacent winding 112 on the triangle mounting 116 has certain interval, both conveniently dispels the heat, also enables stator module 11 and does not disturb each other in the magnetic field that produces when the circular telegram. The triangular fixing member 116 is provided with a positioning hole 117, and the stator plate cover plate 113 is provided with a hole slot 118 corresponding to each positioning hole 117. The stator disc 111 and the stator disc cover plate 113 are correspondingly provided with a plurality of through holes 114. The winding 112 is arranged between the stator disc 111 and the stator disc cover plate 113, and the through holes 114 are formed in the stator disc 111 and the stator disc cover plate 113, so that the winding 112 is convenient to dissipate heat, the working temperature of the winding 112 is effectively reduced, and the performance is improved. A rivet 119 is inserted through the hole 118 and the positioning hole 117 in order and fixed to the stator plate 111. It is contemplated that the stator plate cover 113 may be secured to the stator plate 111 by rivets 119, screws, or other fasteners. A flame retardant layer (not shown) is further disposed between the triangular fixing member 116 and the stator disc cover plate 113, and the flame retardant layer is specifically highland barley paper to play a flame retardant role. The inner wall of the stator disc 111 is provided with a stage 115, and the stator disc cover plate 113 is fixed on the stage 113.

The rotor assembly 12 includes a rotor disc 121, a plurality of magnetic steel sheets 122 disposed between the rotor disc 121 and the stator assembly 11, and a main shaft 123 passing through the rotor disc 121 and the magnetic steel sheets 122 and fixedly connected to the rotor disc 121. A receiving groove (not shown) is formed in one side of the rotor disc 121 facing the stator assembly 11, and the magnetic steel sheet 122 is fixed in the receiving groove by glue. The glue may be one of 326 and 303 type glues, and the fixing of the magnetic steel sheet 122 by a bonding agent such as glue is well known to those skilled in the art, and thus will not be described in detail herein. The main shaft 123 and the rotor disc 121 are connected through a spline, and the spline connection is composed of an internal spline and an external spline. The inner spline and the outer spline are both multi-tooth parts, the spline on the inner cylindrical surface is an inner spline, and the spline on the outer cylindrical surface is an outer spline, which is the prior art, and therefore, the description is omitted here. The number of the magnetic steel sheets 122 is one of 2, 4, 6 or 8, and in the present embodiment, the number of the magnetic steel sheets 122 is 4. The magnetic steel sheets 122 surround the main shaft 123, notches 125 are formed between the adjacent magnetic steel sheets 122, when the stator assembly 11 is electrified, a magnetic field is generated to drive the rotor assembly 12 to rotate, and airflow circulation can be accelerated due to the notches 125 between the adjacent magnetic steel sheets 122, so that heat dissipation is facilitated.

Referring to fig. 1 to 3, a testing table for testing the coreless brushless motor includes a base 21, a first testing seat 22 fixed on the base 21, and a second testing seat 23 horizontally disposed with the first testing seat 22 and slidably connected with the base 21. The test platform should also include some functional modules, such as mounting components, connecting components, electrical components, etc., which are well known to those skilled in the art and therefore will not be described herein.

First, explaining the function and structure of the base 21, the base 21 is usually made of steel to have certain structural strength, and the base 21 is used for installing the first test socket 22 and the second test socket 23 for testing the coreless brushless motor, so the structure of the base 21 is correspondingly matched with the first test socket 22 and the second test socket 23. The base 21 is provided with a screw rod assembly 24 in the horizontal direction, the screw rod assembly is fixedly connected with the second test base 23, the screw rod assembly 24 converts linear motion into rotary motion and converts rotary motion into linear motion, and the screw rod assembly 24 has the characteristics of high precision, reversibility and high efficiency, and the screw rod assembly 24 is a known technology, so that the detailed description is omitted.

The first test seat 22 is provided with a stator fixing seat 31, the second test seat 23 is provided with a rotor fixing seat 32, the stator assembly 11 is fixed on the stator fixing seat 31, and one end, far away from the stator assembly 11, of a main shaft 123 of the rotor assembly 12 penetrates through the rotor fixing seat 32 and is connected with the second test seat 22 through a bearing. The second testing seat 23 is further provided with a distance sensor 25.

In this embodiment, the first testing seat 22 is fixed on the base 21, two sliding grooves 26 are further formed in the two side walls of the base 21 parallel to the screw rod assembly 24, the screw rod assembly 24 is connected with the second testing seat 23 and slides in the sliding grooves 26, the high-precision characteristic of the screw rod assembly 24 can well match with the adjustment of the distance between the stator assembly 11 and the rotor assembly 12, the distance between the stator assembly 11 and the rotor assembly 12 is tested through the distance sensor 25, and the distance between the stator assembly 11 and the rotor assembly 12 affects the relationship between the rotating speed and the torque force, so that the distance between the stator assembly 11 and the rotor assembly 12 can be adjusted as required to achieve the required performance.

Compared with the prior art, the utility model provides a no iron core brushless motor through having seted up a plurality of through-holes 114 on stator disc 111 and stator disc apron 113 correspondingly, and set up in rotor disc 111 with a plurality of magnetic steel piece 122 between stator module 11 produce magnetic field and drive after stator module 11 circular telegram rotor module 12 pivoted in-process reaches good heat dissipation to the cost has been saved to easy loss spare such as the carbon brush of structural not setting up. A test bench utilizes the high precision of a screw rod assembly 24 through a first test seat 22 fixed on a machine base 21 and a second test seat 23 driven by the screw rod assembly 24 to rotate, and can effectively measure and calibrate the gap between a rotor assembly 12 and a stator assembly 11 to meet the requirement.

The above description is only for the preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention, and any modification, equivalent replacement or improvement within the spirit of the present invention is encompassed by the claims of the present invention.

Claims (10)

1. A coreless brushless motor characterized by: the brushless motor without the iron core comprises a stator assembly and a rotor assembly which is arranged with the stator assembly along the same central axis, wherein the stator assembly comprises a stator disc, a plurality of windings arranged in the stator disc and a stator disc cover plate used for packaging the windings in the stator disc, a plurality of through holes are correspondingly formed in the stator disc and the stator disc cover plate, the rotor assembly comprises a rotor disc, a plurality of magnetic steel sheets arranged between the rotor disc and the stator assembly and a main shaft which penetrates through the rotor disc and the magnetic steel sheets and is fixedly connected with the rotor disc, and a magnetic field is generated after the stator assembly is electrified so as to drive the rotor assembly to rotate.

2. The ironless brushless electric machine of claim 1, wherein: the stator disc is provided with a plurality of triangular fixing pieces, each triangular fixing piece is wound with a winding, a positioning hole is formed in each triangular fixing piece, a hole groove is formed in each positioning hole corresponding to each positioning hole in the stator disc cover plate, the through hole is formed between every two adjacent hole grooves, and a rivet sequentially penetrates through the hole grooves and the positioning holes and is fixed with the stator disc.

3. The ironless brushless electric machine of claim 2, wherein: the quantity of triangle mounting is 6, adjacent two the contained angle between the triangle mounting is 60 degrees.

4. The ironless brushless electric machine of claim 2, wherein: and a flame-retardant layer is also arranged between the triangular fixing piece and the stator disc cover plate.

5. The ironless brushless electric machine of claim 1, wherein: the inner wall of the stator disc is provided with a stage, and the stator disc cover plate is fixed on the stage.

6. The ironless brushless electric machine of claim 1, wherein: one side of the rotor disc, which faces the stator assembly, is provided with a containing groove, and the magnetic steel sheet is fixed in the containing groove through glue.

7. The ironless brushless electric machine of claim 1, wherein: the main shaft and the rotor disc are connected through a spline.

8. The ironless brushless electric machine of claim 1, wherein: the number of the magnetic steel sheets is one of 2, 4, 6 or 8.

9. A test bench for testing a coreless, brushless motor according to any of the claims 1 to 8, characterized in that: the test bench includes a frame, and one is fixed last first test seat of frame, one with first test seat level set up and with frame sliding connection's second test seat, be equipped with a lead screw subassembly on the frame horizontal direction, the second test seat with the lead screw subassembly is connected, be equipped with a stator fixing base on the first test seat, be equipped with a rotor fixing base on the second test seat, stator module fixes on the stator fixing base, the main shaft of rotor subassembly is kept away from stator module's one end is passed rotor fixing base and is connected with second test seat bearing.

10. A test bench according to claim 9, characterized in that: and the second test seat is also provided with a distance sensor.

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