CN217642915U - Brushless motor rotor capable of improving magnet fixing performance and brushless motor - Google Patents

Abstract

The utility model provides a brushless motor rotor for improving the magnet fixing performance, which is used in the field of motors, wherein a rotor iron core and a magnet mounting pad are respectively fixedly sleeved on the periphery of a rotor shaft; the Hall magnet is arranged on the magnet mounting pad; because the periphery of the rotor core is convexly provided with the plurality of positioning lugs, and the protruding heights of the positioning lugs are equal, when the magnet outer ring and the magnet mounting pad are assembled, the inner wall of the magnet outer ring is contacted with the positioning lugs to realize circumferential positioning, so that the coaxiality between the magnet outer ring and the rotor shaft is ensured; the position department that does not set up the location lug forms the clearance, and the clearance size of each position of circumference equals, can hold glue in this clearance, can play the bonding and the quantity of balanced glue, improves the reliability and the steadiness of whole assembly body. The utility model discloses a brushless motor can reach the same technological effect.

Description

Brushless motor rotor capable of improving magnet fixing performance and brushless motor

Technical Field

The utility model relates to a motor field further relates to a improve brushless motor rotor of magnet fixity ability. Furthermore, the utility model discloses still relate to a brushless motor.

Background

The brushless direct current motor does not use a mechanical electric brush device, adopts a square wave self-control permanent magnet synchronous motor, replaces a carbon brush commutator with a Hall sensor, and takes the neodymium iron boron as a permanent magnet material of a rotor, has great advantages in performance compared with the common traditional direct current motor, and has the advantages of high efficiency, low energy consumption, low noise, ultra-long service life, high reliability, servo control, stepless frequency conversion and speed regulation and the like.

Keep clearance fit between rotor magnet and the rotor main part, rely on glue fixed, traditional rotor assembly adopts the direct viscose of glue, can not effective control glue yield, the balanced difficult control of glue circumference (one side more one side is few), the problem of disalignment easily appears.

For those skilled in the art, how to improve the coaxiality of the rotor of the brushless motor is a technical problem to be solved at present.

SUMMERY OF THE UTILITY MODEL

The utility model provides an improve brushless motor rotor of magnet fixity ability utilizes the location lug to realize the circumference location, guarantees the axiality, utilizes the clearance to fill glue uniformly simultaneously, guarantees to glue the firm degree that bonds, and concrete scheme is as follows:

a brushless motor rotor capable of improving magnet fixing performance comprises a rotor shaft, a rotor iron core, a magnet outer ring, a Hall magnet and a magnet mounting pad, wherein the rotor iron core and the magnet mounting pad are fixedly sleeved on the periphery of the rotor shaft respectively; the Hall magnet is mounted on the magnet mounting pad;

a plurality of positioning lugs are arranged on the periphery of the rotor core in a protruding mode, and the protruding heights of the positioning lugs are equal; the inner wall of the magnet outer ring is in contact with the positioning lug to realize circumferential positioning, so that a gap exists between the inner wall of the magnet outer ring and the outer wall of the rotor core, and glue is contained in the gap.

Optionally, the rotor core is formed by stacking a plurality of layers of silicon steel sheets, and the outer edge of each silicon steel sheet is provided with the positioning lug respectively.

Optionally, the positioning protrusions arranged on the outer edges of the silicon steel sheets are sequentially aligned in the axial direction.

Optionally, 6 to 8 groups of the positioning lugs are uniformly distributed on the outer wall of the rotor core along the circumferential direction.

Optionally, a stamping groove is formed in the outer surface of the rotor shaft, and two sides of the stamping groove are extruded to protrude out of the outer surface of the rotor shaft;

and the rotor core and the magnet mounting pad are in interference fit with a protrusion formed by extruding the stamping groove.

Optionally, the stamping grooves are axially formed, and a plurality of the stamping grooves are uniformly distributed along the circumferential direction.

Optionally, the number of the stamping grooves is 6-8.

The utility model also provides a brushless motor, including above-mentioned arbitrary brushless motor rotor of improvement magnet fixity ability.

The utility model provides a brushless motor rotor for improving the magnet fixing performance, wherein a rotor iron core and a magnet mounting pad are respectively fixedly sleeved on the periphery of a rotor shaft; the Hall magnet is arranged on the magnet mounting pad; because the periphery of the rotor core is convexly provided with the plurality of positioning lugs, and the protruding heights of the positioning lugs are equal, when the magnet outer ring and the magnet mounting pad are assembled, the inner wall of the magnet outer ring is contacted with the positioning lugs to realize circumferential positioning, so that the coaxiality between the magnet outer ring and the rotor shaft is ensured; the position department that does not set up the location lug forms the clearance, and the clearance size of each position of circumference equals, can hold glue in this clearance, can play the bonding and the quantity of balanced glue, improves the reliability and the steadiness of whole assembly body.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a structural view of the brushless motor rotor of the present invention for improving the magnet fixing performance;

fig. 2 is a longitudinal sectional view of the rotor of the brushless motor of the present invention for improving the magnet fixing performance;

FIG. 3 is an isometric view of the rotor shaft and rotor core assembled to one another;

fig. 4 is a schematic view of the brushless motor rotor with improved magnet fixing performance according to the present invention along the axial direction;

FIG. 5 is a schematic view of a rotor shaft in an axial direction;

fig. 6 is a partially enlarged view of the punched groove.

The figure includes:

the rotor comprises a rotor shaft 1, a punched groove 11, a rotor iron core 2, a positioning lug 21, a magnet outer ring 3, a Hall magnet 4 and a magnet mounting pad 5.

Detailed Description

The core of the utility model lies in providing an improve brushless motor rotor of magnet fixity ability utilizes the location lug to realize the circumference location, guarantees the axiality, utilizes the clearance to fill glue uniformly simultaneously, guarantees to glue the firm degree that bonds.

In order to make those skilled in the art better understand the technical solution of the present invention, the following will describe the brushless motor rotor and the brushless motor with improved magnet fixing performance in detail with reference to the accompanying drawings and specific embodiments.

With reference to fig. 1 to 4, the utility model provides an improve brushless motor rotor of magnet fixity ability, including rotor shaft 1, rotor core 2, magnet outer lane 3, hall magnet 4, magnet mounting pad 5 isotructure. Rotor core 2 and magnet mounting pad 5 are fixed suit in the periphery of rotor shaft 1 respectively, and rotor core 2, magnet mounting pad 5 and rotor core 2 connect as an organic wholely. The hall magnet 4 is installed in magnet mounting pad 5, and hall magnet 4 passes through magnet mounting pad 5 to be connected in rotor core 2.

Combine fig. 3, the utility model discloses periphery protrusion at rotor core 2 sets up a plurality of locating convex block 21, and the convex height of each locating convex block 21 equals, also is located same face of cylinder on each locating convex block 21's summit.

Magnet outer lane 3 is the magnet structure of cylinder, and the circumference location is realized to the inner wall contact location lug 21 of magnet outer lane 3, and location lug 21 provides the support to magnet outer lane 3 in circumference, because the inner wall contact of location lug 21 and magnet outer lane 3, therefore other positions of rotor core 2 surface do not with the inner wall direct contact of magnet outer lane 3, have the clearance between the inner wall of messenger magnet outer lane 3 and rotor core 2's the outer wall, be used for holding glue in the clearance. Because only the positioning lug 21 is contacted with the inner wall of the magnet outer ring 3, the processing precision of the positioning lug 21 is only required to be ensured, and the surface of the outer wall of the rotor iron core 2 does not need to have higher precision, thereby reducing the processing precision requirement; the positioning convex block 21 enables a gap to be formed between the outer surface of the rotor core 2 and the inner surface of the magnet outer ring 3, the gap is uniform in the circumferential dimension, and therefore filled glue can be uniformly and uniformly distributed, the coaxiality of the brushless motor rotor is improved, the bonding and the using amount of the balance glue can be played, and the reliability and the stability of the whole assembly body are improved.

During the assembly, rotor core 2's outer wall coating glue will scribble the mutual cartridge of rotor core 2 and magnet outer lane 3 of glue, and both fixed connection are as an organic whole after glue solidifies. Because glue is used for bonding rotor core 2's surface, rotor core 2's face of cylinder part can set up dull polish structure increase adhesive force.

Combine fig. 2, the utility model provides a rotor core 2 piles up the formation by a plurality of layers of silicon steel sheet, and the outward flange of every silicon steel sheet sets up positioning lug 21 respectively, and synchronous processing forms positioning lug 21 during every silicon steel sheet of stamping process, piles up the fixed rotor core 2 that forms with the silicon steel sheet after a plurality of sheets of punching presses again.

Referring to fig. 3, the positioning protrusions 21 disposed on the outer edges of the silicon steel sheets are aligned in sequence along the axial direction, and the positioning protrusions 21 formed by final stacking form a protruding column along the axial direction. It should be noted that the present invention does not limit that the positioning protrusions 21 must be aligned in sequence along the axial direction, and may be distributed in disorder as long as the positioning protrusions can circumferentially support the magnet outer ring 3.

Preferably, the utility model discloses well rotor core 2's outer wall is along circumference evenly distributed 6 ~ 8 group's location lug 21, provides evenly circumference supporting effect.

On the basis of the above scheme, with reference to fig. 5 and 6, the outer surface of the rotor shaft 1 is provided with the stamping groove 11, the solid structure at the position of the stamping groove 11 is extruded towards two sides, the two sides of the stamping groove 11 are extruded to protrude out of the outer surface of the rotor shaft 1, and the extruded protruding part is higher than the outer surface of the rotor shaft 1. The rotor core 2 and the magnet mounting pad 5 are assembled with a bulge formed by extruding the stamping groove 11 in an interference manner; the height of the protrusions formed by extrusion is adjusted by controlling the depth of the punched groove 11, and the deeper the depth, the higher the protrusions. The utility model discloses the mode that utilizes to set up punching press recess 11 at rotor shaft 1's surface forms protrudingly, utilizes the arch to realize interference fit, therefore need not the surface of high accuracy processing rotor shaft 1, plays the effect of simplifying processing.

Preferably, the utility model discloses a punching press recess 11 is seted up along the axial, and a plurality of punching press recess 11 is along circumference evenly distributed, ensures that the protruding degree of each position of circumference equals, guarantees the homogeneity of assembly. Of course, the utility model discloses and not only inject punching press recess 11 and set up this kind of single mode along the axial, can also be along the circumferencial direction and be the annular and arrange a plurality of, perhaps be the heliciform and arrange.

Specifically, the number of the stamping grooves 11 is 6-8, so that the tightness of interference fit is ensured.

The utility model also provides a brushless motor, including foretell brushless motor rotor that improves the fixed performance of magnet, this brushless motor can reach the same technological effect.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A brushless motor rotor capable of improving magnet fixing performance is characterized by comprising a rotor shaft (1), a rotor iron core (2), a magnet outer ring (3), a Hall magnet (4) and a magnet mounting pad (5), wherein the rotor iron core (2) and the magnet mounting pad (5) are fixedly sleeved on the periphery of the rotor shaft (1) respectively; the Hall magnet (4) is mounted on the magnet mounting pad (5);

a plurality of positioning lugs (21) are convexly arranged on the periphery of the rotor core (2), and the protruding heights of the positioning lugs (21) are equal; the inner wall of the magnet outer ring (3) is in contact with the positioning lug (21) to realize circumferential positioning, so that a gap exists between the inner wall of the magnet outer ring (3) and the outer wall of the rotor core (2), and glue is contained in the gap.

2. The brushless motor rotor with the improved magnet fixing performance according to claim 1, wherein the rotor core (2) is formed by stacking a plurality of layers of silicon steel sheets, and the positioning lug (21) is respectively arranged on the outer edge of each silicon steel sheet.

3. The rotor of a brushless motor with improved magnet fixing performance according to claim 2, wherein the positioning protrusions (21) arranged on the outer edges of the silicon steel sheets are sequentially aligned in the axial direction.

4. The rotor of the brushless electric machine with the improved magnet fixing performance according to claim 3, wherein 6-8 sets of the positioning projections (21) are uniformly distributed on the outer wall of the rotor core (2) along the circumferential direction.

5. The rotor of a brushless motor with improved magnet fixing performance according to any one of claims 1 to 4, wherein the outer surface of the rotor shaft (1) is provided with a punched groove (11), and two sides of the punched groove (11) are extruded to protrude out of the outer surface of the rotor shaft (1);

the rotor core (2) and the magnet mounting pad (5) are in interference fit with a protrusion formed by extruding the stamping groove (11).

6. The rotor of a brushless motor with improved magnet fixing performance according to claim 5, wherein the punched grooves (11) are axially open, and a plurality of punched grooves (11) are uniformly distributed along the circumferential direction.

7. The rotor of a brushless motor with improved magnet fixing performance according to claim 5, wherein the number of the punched grooves (11) is 6-8.

8. A brushless motor comprising a rotor of the brushless motor of any one of claims 1 to 7 for improving a magnet fixing performance.

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