CN208754084U - A kind of brushless motor magnetic rotor structure - Google Patents

Abstract

The utility model discloses a kind of brushless motor magnetic rotor structures, including motor shaft and first bearing, motor shaft left end outer sheath is equipped with first bearing, bearing washer is set on the right side of the first bearing, motor shaft middle position outer sheath is equipped with rotor core, the first balancing loop is set on the left of the rotor core, the second balancing loop is set on the right side of the rotor core, the motor shaft right end outer sheath is equipped with second bearing, position-limiting action effectively can be carried out to magnet steel by the interior limiting section installed inside silicon steel sheet and outer limiting section, it can guarantee the prolonged normal table work of brushless motor；It can be dynamically balanced to play the role of under rotor high-speed rotation by installing balancing loop at left and right sides of rotor core, reduce the vibration generated under rotor high-speed rotation and noise, the balancing loop installed at left and right sides of rotor core can also prevent the magnet steel in rotor core to be displaced when rotor carries out rotation work, keep motor operations more efficient.

Description

A kind of brushless motor magnetic rotor structure

Technical field

The utility model belongs to brushless motor correlative technology field, and in particular to a kind of brushless motor magnetic rotor structure.

Background technique

Brushless motor is also referred to as DC brushless motor, since it is with high-efficient, operating noise is low, small in size, reliability The feature of length of good and service life is widely used in the neck such as Industry Control, automobile electronics, household electrical appliance power and fan Domain, wherein the magnetic rotor structure inside brushless motor is the source of brushless motor power.

Existing brushless motor magnetic rotor structure technology has the following problems:

1, existing brushless motor magnetic rotor structure is run at high speed due to the long-time of motor, rotor can generate it is very big from The magnet steel that mental and physical efforts are likely to result in internal rotor installation is subjected to displacement, and the danger for causing magnet steel to disperse causes brushless motor cannot It works normally, influences the service life of motor, bring big inconvenience and loss to the production and living of people；

2, existing brushless motor magnetic rotor structure is fitted without effective dynamic poise device, in high-speed rotation inside it Even if having the eccentricity of very little to also result in rotor generates very big centrifugal force, make motor generates during the work time vibration with Noise, and the abrasion of the components such as bearing that can accelerate internal rotor, reduce the service life and practicability of motor.

Utility model content

The purpose of this utility model is to provide a kind of brushless motor magnetic rotor structures, to solve to mention in above-mentioned background technique Magnet steel out is easy to happen displacement and is fitted without effective dynamic poise device problem.

To achieve the above object, the utility model provides the following technical solutions:

A kind of brushless motor magnetic rotor structure, including motor shaft and first bearing, motor shaft left end outer sheath Equipped with first bearing, bearing washer is set on the right side of the first bearing, motor shaft middle position outer sheath, which is equipped with, to be turned Sub- iron core, the rotor core left side are set with the first balancing loop, are set with the second balancing loop on the right side of the rotor core, The motor shaft right end outer sheath is equipped with second bearing.

Preferably, the motor shaft includes shaft endpiece, rotor construction section, the second balancing loop construction section and tupelo Section, the shaft endpiece right side are equipped with rotor construction section by casting, are equipped on the right side of the rotor construction section by being poured Second balancing loop construction section, the second balancing loop construction section right side are equipped with shaft head section by casting.

Preferably, first balancing loop includes first rotating shaft hole, balance ring body and lightening hole, the first rotating shaft hole Outside surrounding is equipped with balance ring body by being poured, by being fixedly installed with lightening hole inside the balance ring body.

Preferably, the rotor core includes silicon steel sheet, magnet steel, inner groovy and external groove, is passed through inside the silicon steel sheet It is slidably fitted with magnet steel, passes through casting at left and right sides of the magnet steel lower end and inner groovy, the magnet steel upper end left and right sides is installed External groove is installed by casting.

Preferably, the silicon steel sheet includes the second shaft hole, outer circle layer, heat release hole, interconnecting piece, interior limiting section and outer limit Portion, the second shaft hole outside are equipped with outer circle layer by casting, pass through fixation between the outer circle layer and the second shaft hole Heat release hole is installed, the outer circle layer outside is by being fixedly installed with interconnecting piece, welding peace at left and right sides of the interconnecting piece lower end Equipped with interior limiting section, outer limiting section is installed by welding at left and right sides of the interconnecting piece upper end.

Preferably, first balancing loop and the second balancing loop size is identical and internal structure is identical, described first Balancing loop and the second balancing loop are respectively symmetrically mounted on the left and right sides of rotor core.

Preferably, the rotor construction section diameter is greater than the diameter of shaft endpiece, and the second balancing loop construction section is straight Diameter is greater than the diameter of rotor construction section, and the shaft head section diameter is identical as the diameter of shaft endpiece.

Preferably, the structure of the interconnecting piece is rectangle, the left and right of the interior limiting section and outer limiting section it is of same size and Their left and right width is 0.2-1mm wider than interconnecting piece respectively.

Compared with prior art, the utility model provides a kind of brushless motor magnetic rotor structure, has following beneficial to effect Fruit:

1, the silicon steel sheet that the utility model is installed in rotor core includes the second shaft hole, outer circle layer, heat release hole, connection Portion, interior limiting section and outer limiting section, such benefit is can by the interior limiting section and outer limiting section installed inside silicon steel sheet Position-limiting action effectively is carried out to magnet steel, can effectively prevent magnet steel that position occurs because of centrifugal force when rotor carries out high-speed rotation The case where shifting, improves the stability of brushless motor magnet rotor work；And when rotor core can be worked by heat release hole The heat of generation sheds, and can guarantee the prolonged normal table work of brushless motor, increase the service life of brushless motor, Very big convenience and economic benefit are brought to the production and living of people；

2, the utility model is mounted with the first balancing loop on the left of rotor core and is mounted on the right side of rotor core Second balancing loop, structure include that first rotating shaft hole, balance ring body and lightening hole, such benefit are by rotor core Left and right sides installation balancing loop can be dynamically balanced to play the role of under rotor high-speed rotation, reduces and produces under rotor high-speed rotation Raw vibration and noise, effectively can prevent shaft from wearing, and improve the working life of brushless motor；It is right in process of production Rotor can also make rotor reach dynamic balancing when carrying out dynamic balancing adjustment by doing blank operation to balancing loop, easy to operate； Meanwhile the balancing loop installed at left and right sides of rotor core can also prevent in rotor core when rotor carries out rotation work Magnet steel is displaced, and keeps motor operations more efficient.

Detailed description of the invention

Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with this Novel embodiment is used to explain the utility model together, does not constitute limitations of the present invention, in the accompanying drawings:

Fig. 1 be the utility model proposes a kind of brushless motor magnetic rotor structure structural schematic diagram；

Fig. 2 be the utility model proposes motor shaft structural schematic diagram；

Fig. 3 be the utility model proposes the first balancing loop structural schematic diagram；

Fig. 4 be the utility model proposes rotor core structure schematic diagram；

Fig. 5 be the utility model proposes silicon steel structure schematic diagram.

In figure: 1, motor shaft；2, first bearing；3, bearing washer；4, the first balancing loop；41, first rotating shaft hole； 42, ring body is balanced；43, lightening hole；5, rotor core；51, silicon steel sheet；511, the second shaft hole；512, outer circle layer；513, it dissipates Hot hole；514, interconnecting piece；515, interior limiting section；516, outer limiting section；52, magnet steel；53, inner groovy；54, external groove；6, second Balancing loop；7, second bearing；8, shaft endpiece；9, rotor construction section；10, the second balancing loop construction section；11, tupelo Section.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Fig. 1-5 is please referred to, the utility model provides a kind of technical solution:

A kind of brushless motor magnetic rotor structure, including motor shaft 1 and first bearing 2,1 left end of motor shaft outside suit There is first bearing 2, bearing washer 3 is set on the right side of first bearing 2,1 middle position outer sheath of motor shaft is equipped with rotor core 5, the first balancing loop 4 is set on the left of rotor core 5, and the second balancing loop 6, motor shaft 1 are set on the right side of rotor core 5 Right end outer sheath is equipped with second bearing 7.

Further, motor shaft 1 includes shaft endpiece 8, rotor construction section 9, the second balancing loop construction section 10 and shaft Head section 11 is equipped with rotor construction section 9 by casting on the right side of shaft endpiece 8, is equipped with the by casting on the right side of rotor construction section 9 Two balancing loop construction sections 10 are equipped with shaft head section 11 by casting on the right side of second balancing loop construction section 10；Pass through installation The not motor shaft 1 of coax segments, be capable of more convenient fastening carries out installation fixation to components such as rotor cores 5.

Further, the first balancing loop 4 includes first rotating shaft hole 41, balance ring body 42 and lightening hole 43, first rotating shaft hole 41 outside surroundings are equipped with balance ring body 42 by casting, balance inside ring body 42 by being fixedly installed with lightening hole 43；Pass through It can be to play the role of dynamically balanced, reduction rotor under rotor high-speed rotation that balancing loop is installed at left and right sides of rotor core 5 The vibration generated under high-speed rotation and noise can effectively prevent motor shaft 1 from wearing, improve the work longevity of brushless motor Life；It can also make to turn by doing blank operation to balancing loop when carrying out dynamic balancing adjustment to rotor core 5 in process of production Sub- iron core 5 reaches dynamic balancing, easy to operate；Meanwhile the balancing loop installed at left and right sides of rotor core 5 is rotated in rotor The magnet steel 52 in rotor core 5 can also be prevented to be displaced when work, keep brushless motor work more efficient.

Further, rotor core 5 includes silicon steel sheet 51, magnet steel 52, inner groovy 53 and external groove 54, is led to inside silicon steel sheet 51 It crosses and is slidably fitted with magnet steel 52, inner groovy 53,52 upper end of magnet steel or so two are equipped with by casting at left and right sides of 52 lower end of magnet steel Side is equipped with external groove 54 by casting；By rotor core 5 power can be provided for the normal work of brushless motor.

Further, silicon steel sheet 51 includes the second shaft hole 511, outer circle layer 512, heat release hole 513, interconnecting piece 514, interior limit Position portion 515 and outer limiting section 516 are equipped with outer circle layer 512, outer circle layer 512 and second by casting on the outside of second shaft hole 511 By being fixedly installed with heat release hole 513 between shaft hole 511,512 outside of outer circle layer is by being fixedly installed with interconnecting piece 514, even It is installed by welding with interior limiting section 515 at left and right sides of 514 lower end of socket part, is installed by welding with outer limit at left and right sides of 514 upper end of interconnecting piece Position portion 516；Effectively magnet steel 52 can be carried out by the interior limiting section 515 and outer limiting section 516 installed inside silicon steel sheet 51 Position-limiting action, can rotor carry out high-speed rotation when effectively prevent magnet steel 52 to be subjected to displacement because of centrifugal force the case where, improve The stability of brushless motor magnet rotor work can guarantee the prolonged normal table work of brushless motor, increase brushless The service life of motor.

Further, the first balancing loop 4 is identical with 6 size of the second balancing loop and internal structure is identical, the first dynamic balancing Ring 4 and the second balancing loop 6 are respectively symmetrically mounted on the left and right sides of rotor core 5；By in the left and right of rotor core 5 two Two sizes and the identical balancing loop of internal structure are installed in side, more efficient and convenient can provide for rotor high-speed rotation dynamic Balance, guarantees the normal work of brushless motor.

Further, 9 diameter of rotor construction section is greater than the diameter of shaft endpiece 8, and 10 diameter of the second balancing loop construction section is big In the diameter of rotor construction section 9,11 diameter of shaft head section is identical as the diameter of shaft endpiece 8；By installing different size diameter Motor shaft 1 more convenient the component being set on the outside of motor shaft 1 can be fixed on the positioning.

Further, the structure of interconnecting piece 514 is rectangle, and the left and right of interior limiting section 515 and outer limiting section 516 is of same size And their left and right width is 0.2-1mm wider than interconnecting piece 514 respectively；It can be more convenient by setting rectangle interconnecting piece 514 Magnet steel 52 is installed, the left and right width relative to interconnecting piece 514 of interior limiting section 515 and outer limiting section 516 if it is less than Then limit effect is undesirable by 0.2mm, then has a certain impact to magnetic surface product if it is greater than 1mm.

The working principle and process for using of the utility model:

The utility model when in use first fits together a certain number of silicon steel sheets 51, then passes through magnet steel 52 Magnet steel 52 is mounted on silicon steel sheet 51 by the cooperation with inner groovy 53 and external groove 54 by interior limiting section 515 and outer limiting section 516 Inside forms rotor core 5 with silicon steel sheet 51 together, the second balancing loop 6 is mounted on to the second balancing loop of motor shaft 1 On construction section 10, then rotor core 5 is mounted on rotor construction section 9, the first balancing loop 4 is mounted on rotor core 5 Left side, bearing washer 3 and first bearing 2 are mounted on shaft endpiece 8, second bearing 7 is mounted in shaft head section 11, After being installed, check whether the installation of rotor core 5 and the first balancing loop 4 and the second balancing loop 6 meets dynamic balancing It is required that the installation for checking between them whether fasten it is firm, check first bearing 2 and bearing washer 3 installation whether in place with And whether the installation of second bearing 7 meets requirement and can move to the motor magnet rotor being installed after inspection is errorless Balance test carries out blank balance to the first balancing loop 4 and the second balancing loop 6 according to test structure, meets dynamic balancing Assembly work can be carried out to motor magnet rotor after it is required that.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (8)

1. a kind of brushless motor magnetic rotor structure, including motor shaft (1) and first bearing (2), it is characterised in that: the motor Shaft (1) left end outer sheath is equipped with first bearing (2), is set with bearing washer (3), the horse on the right side of the first bearing (2) Rotor core (5) are housed up to shaft (1) middle position outer sheath, are set with the first balancing loop on the left of the rotor core (5) (4), it is set with the second balancing loop (6) on the right side of the rotor core (5), motor shaft (1) the right end outer sheath is equipped with the Two bearings (7).

2. a kind of brushless motor magnetic rotor structure according to claim 1, it is characterised in that: motor shaft (1) packet Include shaft endpiece (8), rotor construction section (9), the second balancing loop construction section (10) and shaft head section (11), the shaft endpiece (8) right side passes through casting and is equipped with rotor construction section (9), is equipped with second by casting on the right side of the rotor construction section (9) and moves Balance ring construction section (10), the second balancing loop construction section (10) right side are equipped with shaft head section (11) by casting.

3. a kind of brushless motor magnetic rotor structure according to claim 1, it is characterised in that: first balancing loop It (4) include first rotating shaft hole (41), balance ring body (42) and lightening hole (43), surrounding passes through on the outside of the first rotating shaft hole (41) Casting is equipped with balance ring body (42), and the balance ring body (42) is internal by being fixedly installed with lightening hole (43).

4. a kind of brushless motor magnetic rotor structure according to claim 1, it is characterised in that: rotor core (5) packet Silicon steel sheet (51), magnet steel (52), inner groovy (53) and external groove (54) are included, passes through inside the silicon steel sheet (51) and is slidably fitted with Magnet steel (52), magnet steel (52) the lower end left and right sides are equipped with inner groovy (53) by casting, and magnet steel (52) upper end is left Right two sides are equipped with external groove (54) by casting.

5. a kind of brushless motor magnetic rotor structure according to claim 4, it is characterised in that: the silicon steel sheet (51) includes Second shaft hole (511), outer circle layer (512), heat release hole (513), interconnecting piece (514), interior limiting section (515) and outer limiting section (516), it is equipped with outer circle layer (512) on the outside of second shaft hole (511) by casting, the outer circle layer (512) and second By being fixedly installed with heat release hole (513) between shaft hole (511), pass through the company of being fixedly installed on the outside of the outer circle layer (512) Socket part (514), interconnecting piece (514) the lower end left and right sides are installed by welding with interior limiting section (515), the interconnecting piece (514) Outer limiting section (516) are installed by welding at left and right sides of upper end.

6. a kind of brushless motor magnetic rotor structure according to claim 1, it is characterised in that: first balancing loop (4) and internal structure identical with the second balancing loop (6) size is identical, first balancing loop (4) and the second balancing loop (6) respectively symmetrically it is mounted on the left and right sides of rotor core (5).

7. a kind of brushless motor magnetic rotor structure according to claim 2, it is characterised in that: the rotor construction section (9) Diameter is greater than the diameter of shaft endpiece (8), and the second balancing loop construction section (10) diameter is greater than the straight of rotor construction section (9) Diameter, shaft head section (11) diameter are identical as the diameter of shaft endpiece (8).

8. a kind of brushless motor magnetic rotor structure according to claim 5, it is characterised in that: the interconnecting piece (514) Structure is rectangle, the left and right of the interior limiting section (515) and outer limiting section (516) it is of same size and they left and right width difference Than interconnecting piece (514) width 0.2-1mm.