CN217984819U

CN217984819U - Permanent magnet motor with large torque, low rotating speed and low cost

Info

Publication number: CN217984819U
Application number: CN202222000914.0U
Authority: CN
Inventors: 林云川
Original assignee: Zhejiang Teda Motor Co ltd
Current assignee: Zhejiang Teda Motor Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-12-06
Anticipated expiration: 2032-07-29

Abstract

The utility model discloses a low rotational speed low-cost permanent-magnet machine of big moment of torsion, including stator and rotor, still include the fixed axle, the stator includes coil skeleton, coil skeleton installs on the fixed axle, is provided with a plurality of salient poles along circumference on the coil skeleton, and the coiling has the winding on every salient pole to be equipped with a separation groove between per two adjacent salient poles, the rotor cover is established in the stator periphery, the rotor includes the sleeve, evenly be provided with a plurality of magnets along circumference on the telescopic inner wall, the number of poles of magnet is less than the quantity in separation groove. The utility model has the advantages of big moment of torsion, low rotational speed and low cost, be fit for wideling popularize and use.

Description

Permanent magnet motor with large torque, low rotating speed and low cost

Technical Field

The utility model relates to the technical field of electric machines, especially, relate to a permanent-magnet machine of big moment of torsion low rotational speed low cost.

Background

The existing permanent magnet motor generally comprises a stator, a rotor and a rotating shaft, wherein the stator is arranged on the periphery of the rotor, the rotating shaft is connected with the rotor in a linkage manner, the stator is electrified to enable the rotor to rotate, and the rotor drives the rotating shaft to rotate. The permanent magnet motor has the defects of small torque and high production cost, so that a permanent magnet motor with large torque, low rotating speed and low cost is urgently needed in the market to solve the problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a permanent-magnet machine of big moment of torsion low-speed low cost, the utility model has the advantages of big moment of torsion, low rotational speed and low cost, be fit for wideling popularize the use.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a permanent-magnet machine of big moment of torsion low-speed low cost, includes stator and rotor, still includes the fixed axle, the stator includes coil skeleton, coil skeleton installs on the fixed axle, is provided with a plurality of salient poles along circumference on the coil skeleton, and the coiling has the winding on every salient pole to be equipped with a separation groove between every two adjacent salient poles, the rotor cover is established in the stator periphery, the rotor includes the sleeve, evenly be provided with a plurality of magnets along circumference on the telescopic inner wall, the number of poles of magnet is less than the quantity in separation groove.

Through adopting above-mentioned technical scheme, set up the rotor in the stator periphery, the stator is installed on the fixed axle, and the fixed axle is motionless with the stator, and the rotor rotates, and the magnet number of poles on the rotor is less than the separating groove quantity on the stator coil skeleton, and for permanent-magnet machine on the existing market, this design can not only reduce the manufacturing cost of enterprise, has big rotational speed and low-cost advantage moreover, is fit for widelys using widely.

The utility model discloses further set up as, the quantity in separating the groove is 36, the number of poles of magnet is 30 utmost points.

The utility model discloses further set up to, the outer wall of magnet closely laminates with telescopic inner wall to per two adjacent magnets support tightly mutually.

Through adopting above-mentioned technical scheme, need not to realize the installation of magnet with the help of the fastener, the equipment production of being convenient for.

The utility model discloses further set up to, telescopic upper and lower both ends are connected with an upper end cover and lower end cover respectively, the last through-hole that supplies the fixed axle to pass is seted up at the upper end cover middle part, the lower through-hole that supplies the fixed axle to pass is seted up at the lower end cover middle part, upper end cover, lower end cover and sleeve surround and form an inner chamber, the stator sets up in the inner chamber.

Through adopting above-mentioned technical scheme, can not only play the effect of protection stator, enable the rotor moreover and rotate around the fixed axle is stable.

The utility model discloses further set up to, still establish at fixed epaxial upper bearing and lower bearing including the cover, be equipped with first interior step and second interior step on the fixed axle, upper end cover and lower end cover inboard are equipped with first outer step and the outer step of second respectively, the inner of upper bearing inner race supports on first interior step, and the outer end of upper bearing outer lane supports on first outer step, the inner of lower bearing inner race supports on the step in the second, and the outer end of lower bearing outer lane supports on the step outside the second.

Through adopting above-mentioned technical scheme, can not only play the spacing effect of axial to the rotor, can show the friction that reduces between upper end cover and the fixed axle, between lower extreme cover and the fixed axle moreover.

The utility model discloses further set up to, the inner of upper end cover and bottom end cover is equipped with one respectively and is used for right the magnet plays spacing last spacing flange of axial and lower spacing flange.

Through adopting above-mentioned technical scheme, can play the spacing effect of axial to the magnet, promote the stability of magnet installation.

The utility model discloses further set up to, the upper end cover periphery is equipped with a plurality of first connecting flange, first mounting hole has been seted up on the first connecting flange, the lower end cover periphery is equipped with a plurality of second connecting flange, the second mounting hole has been seted up on the second connecting flange.

Through adopting above-mentioned technical scheme, be convenient for sleeve and being connected of other parts to drive appointed part and rotate.

The utility model discloses further set up to, a plurality of ventilation holes have all been seted up on upper end cover and the lower end cover.

Through adopting above-mentioned technical scheme, do benefit to the ventilation cooling of motor.

Drawings

Fig. 1 is a schematic overall structure diagram of the present invention;

FIG. 2 is a cross-sectional view of the entire device;

FIG. 3 is a schematic view of the fitting structure of the stator and the fixing shaft according to the present invention;

FIG. 4 is a schematic structural view of a rotor of the present invention;

fig. 5 is the schematic structural diagram of the vent hole formed by the upper end cover and the lower end cover of the utility model.

In the figure: 1. a stator; 2. a rotor; 3. a fixed shaft; 4. a coil bobbin; 5. salient poles; 6. a winding; 7. separating the grooves; 8. a sleeve; 9. a magnet; 10. an upper end cover; 11. a lower end cover; 12. an upper through hole; 13. a lower through hole; 14. an inner cavity; 15. an upper bearing; 16. a lower bearing; 17. a first inner step; 18. a second inner step; 19. a first outer step; 20. a second outer step; 21. an upper restraint flange; 22. a lower limit flange; 23. a first connecting flange; 24. a first mounting hole; 25. a second connecting flange; 26. a second mounting hole; 27 vent holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example (b): the permanent magnet motor with large torque, low rotating speed and low cost as shown in the attached drawings 1-4 comprises a stator 1 and a rotor 2, and further comprises a fixed shaft 3, wherein the stator 1 comprises a coil framework 4, the coil framework 4 is installed on the fixed shaft 3 (the two are in key connection), a plurality of salient poles 5 are integrally arranged on the coil framework 4 along the circumferential direction, a winding 6 is wound on each salient pole 5, a separation groove 7 is arranged between every two adjacent salient poles 5, the rotor 2 is sleeved on the periphery of the stator 1, the rotor 2 comprises a sleeve 8, a plurality of magnets 9 are uniformly arranged on the inner wall of the sleeve 8 along the circumferential direction, the magnets 9 are praseodymium-neodymium magnet, the magnets 9 form an annular magnetic ring, the number of the annular magnetic ring can be multiple groups in the longitudinal direction, and the number of poles of the magnets 9 is smaller than the number of the separation grooves 7. Set up rotor 2 in 1 periphery of stator, stator 1 installs on fixed axle 3, and fixed axle 3 is motionless with stator 1, and rotor 2 rotates, and the 9 utmost points of magnet on the rotor 2 are less than the 7 quantity in separating the groove on 1 coil skeleton 4 of stator, and for permanent-magnet machine on the existing market, this design can not only reduce the manufacturing cost of enterprise, can increase the output of motor moreover, is fit for widelys to use widely.

In this embodiment, the number of the slots 7 is 36, and the number of poles of the magnet 9 is 30.

As shown in fig. 4, the outer wall of the magnet 9 is tightly attached to the inner wall of the sleeve 8 (press-fit between the contact surfaces), and every two adjacent magnets 9 are abutted against each other, that is, every two adjacent magnets 9 are fixed by the pressing force, so that the assembly of the plurality of magnets 9 is realized without a connecting member. Therefore, the magnet 9 can be installed without fasteners, and assembly and production are facilitated.

As shown in fig. 2, an upper end cover 10 and a lower end cover 11 are respectively connected to the upper end and the lower end of the sleeve 8 through screws, an upper through hole 12 for the fixing shaft 3 to pass through is formed in the middle of the upper end cover 10, a lower through hole 13 for the fixing shaft 3 to pass through is formed in the middle of the lower end cover 11, the upper end cover 10, the lower end cover 11 and the sleeve 8 surround to form an inner cavity 14, and the stator 1 is arranged in the inner cavity 14. This design can not only play the effect of protection stator 1, can make rotor 2 around fixed axle 3 steady rotation moreover.

As shown in fig. 2, the permanent magnet motor further includes an upper bearing 15 and a lower bearing 16 sleeved on the fixed shaft 3, the fixed shaft 3 is provided with a first inner step 17 and a second inner step 18, the inner sides of the upper end cover 10 and the lower end cover 11 are respectively provided with a first outer step 19 and a second outer step 20, the inner end of the inner ring of the upper bearing 15 abuts against the first inner step 17, the outer end of the outer ring of the upper bearing 15 abuts against the first outer step 19, the inner end of the inner ring of the lower bearing 16 abuts against the second inner step 18, and the outer end of the outer ring of the lower bearing 16 abuts against the second outer step 20. The design not only can play an axial limiting effect on the rotor 2, but also can obviously reduce the friction between the upper end cover 10 and the fixed shaft 3 and between the lower end cover 11 and the fixed shaft 3.

As shown in fig. 2, the inner ends of the upper end cap 10 and the lower end cap 11 are respectively provided with an upper limit flange 21 and a lower limit flange 22 for axially limiting the magnet 9. This design can play the spacing effect of axial to magnet 9, promotes the stability of magnet 9 installation.

As shown in fig. 1, a plurality of first connecting flanges 23 are disposed on the periphery of the upper end cover 10, first mounting holes 24 are formed on the first connecting flanges 23, a plurality of second connecting flanges 25 are disposed on the periphery of the lower end cover 11, and second mounting holes 26 are formed on the second connecting flanges 25. This design facilitates the connection of the sleeve 8 to other components, thereby driving the designated components to rotate.

As shown in fig. 5, a plurality of ventilation holes 27 are formed in the upper end cover 10 and the lower end cover 11, and the ventilation holes 27 are designed to facilitate ventilation and heat dissipation of the motor.

Claims

1. The utility model provides a permanent-magnet machine of big moment of torsion low-speed low cost, includes stator (1) and rotor (2), its characterized in that: still include fixed axle (3), stator (1) includes coil skeleton (4), install on fixed axle (3) coil skeleton (4), be provided with a plurality of salient poles (5) along circumference on coil skeleton (4), the coiling has winding (6) on every salient pole (5) to be equipped with one between every two adjacent salient poles (5) and separate groove (7), stator (1) periphery is established to rotor (2) cover, rotor (2) include sleeve (8), evenly be provided with a plurality of magnets (9) along circumference on the inner wall of sleeve (8), the number of poles of magnet (9) is less than separate the quantity of groove (7).

2. A high torque low speed low cost permanent magnet machine according to claim 1 wherein: the number of the separation grooves (7) is 36, and the number of poles of the magnet (9) is 30.

3. A high torque low speed low cost permanent magnet machine according to claim 1 wherein: the outer wall of each magnet (9) is tightly attached to the inner wall of the sleeve (8), and every two adjacent magnets (9) are mutually abutted.

4. A high torque low speed low cost permanent magnet machine according to claim 1 wherein: the upper end and the lower end of the sleeve (8) are respectively connected with an upper end cover (10) and a lower end cover (11), an upper through hole (12) for the fixing shaft (3) to pass is formed in the middle of the upper end cover (10), a lower through hole (13) for the fixing shaft (3) to pass is formed in the middle of the lower end cover (11), the upper end cover (10), the lower end cover (11) and the sleeve (8) surround to form an inner cavity (14), and the stator (1) is arranged in the inner cavity (14).

5. The high torque low speed low cost permanent magnet machine of claim 4 wherein: still establish upper bearing (15) and lower bearing (16) on fixed axle (3) including the cover, be equipped with first interior step (17) and second interior step (18) on fixed axle (3), upper end cover (10) and lower end cover (11) inboard are equipped with first outer step (19) and second outer step (20) respectively, the inner of upper bearing (15) inner circle supports on first interior step (17), and the outer end of upper bearing (15) outer lane supports on first outer step (19), the inner of lower bearing (16) inner circle supports on second interior step (18), and the outer end of lower bearing (16) outer lane supports on second outer step (20).

6. The high torque low speed low cost permanent magnet machine of claim 4 wherein: the inner ends of the upper end cover (10) and the lower end cover (11) are respectively provided with an upper limiting flange (21) and a lower limiting flange (22) which are used for axially limiting the magnet (9).

7. The high torque low speed low cost permanent magnet machine of claim 4 wherein: the outer periphery of the upper end cover (10) is provided with a plurality of first connecting flanges (23), first mounting holes (24) are formed in the first connecting flanges (23), a plurality of second connecting flanges (25) are arranged on the outer periphery of the lower end cover (11), and second mounting holes (26) are formed in the second connecting flanges (25).

8. The high torque low speed low cost permanent magnet machine of claim 4 wherein: a plurality of vent holes (27) are formed in the upper end cover (10) and the lower end cover (11).