CN217642920U

CN217642920U - Rotor of disk motor

Info

Publication number: CN217642920U
Application number: CN202221075019.9U
Authority: CN
Inventors: 陈拯民
Original assignee: Tongling Hardcore Motor Technology Co ltd
Current assignee: Tongling Hardcore Motor Technology Co ltd
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2022-10-21
Anticipated expiration: 2032-05-06

Abstract

The utility model relates to the field of electric machines, concretely relates to disc motor's rotor, including rotor backplate, magnetic conduction board and magnet steel, the rotor backplate be opening form casing, the magnetic conduction board is whole to be cylindricly, in the cavity of rotor backplate was arranged in to the magnetic conduction board, the magnet steel be provided with two and more than two, the magnet steel is attached on the surface that the magnetic conduction board is close to rotor backplate opening part one side, and the even interval arrangement of circumference of a plurality of magnet steels along the magnetic conduction board, the outer anchor ring of magnet steel support and lean on the inside wall of rotor backplate, the interior anchor ring side of magnet steel is provided with the briquetting, the briquetting side is provided with the fastener, this fastener drives briquetting and extrudees the magnet steel on one side of the inside wall of rotor backplate at the in-process of fastening. The magnetic steel is firmly locked on the rotor back plate, and the position fixation of the magnetic steel also realizes the limit of the magnetic conduction plate. The magnetic conduction plate and the magnetic steel are reliably and mechanically fixed, the fastening reliability is higher, and the stability of the rotor is greatly improved.

Description

Rotor of disk motor

Technical Field

The utility model relates to the field of electric machines, concretely relates to disc motor's rotor.

Background

The disc type motor is an axial permanent magnet motor, and a rotor of the motor mainly comprises a rotor back plate, a magnetic conduction plate and magnetic steel, wherein the magnetic steel and the magnetic conduction plate are fixed on the rotor back plate. Because the rotor is under the action of axial magnetic pull force of the stator on the rotor, the magnetic steel and the magnetic conduction plate tend to be attracted to the stator. And the magnetic conduction plate and the magnetic steel can also be acted by centrifugal force when the rotor rotates, and the magnetic steel and the magnetic conduction plate also have the risk of falling off from the rotor back plate. Therefore, the magnetic steel and the magnetic conduction plate are necessary to be reliably fixed. At present, the fixing is carried out by adopting a gluing mode, and the reliability of the fixing mode is poor. Especially, in a high-temperature environment, the adhesive force of the adhesive is greatly reduced, magnetic steel and the like are easy to fall off, and the quality and the service life of the motor are seriously influenced. In order to solve the problem of rotor heating, a special cooling system is additionally added to cool the rotor, so that the use amount of parts and materials is increased, the cost of the motor is high, and the efficiency is low.

Disclosure of Invention

The utility model aims at providing a simple structure, disc motor's that stability is good rotor.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a rotor of disk motor, includes rotor backplate, magnetic conduction board and magnet steel, the rotor backplate be opening form casing, the magnetic conduction board is whole cylindricly, the magnetic conduction board is arranged in the cavity of rotor backplate, the magnet steel be provided with two and more than two, the magnet steel is attached on the surface that the magnetic conduction board is close to rotor backplate opening part one side, and a plurality of magnet steels along the even interval arrangement of circumference of magnetic conduction board, the outer anchor ring of magnet steel support and lean on the inside wall of rotor backplate, the inner anchor ring side of magnet steel is provided with the briquetting, the briquetting side is provided with the fastener, this fastener drives the briquetting and extrudees the magnet steel towards inside wall one side of rotor backplate at the in-process of fastening.

By adopting the technical scheme, the magnetic steel is extruded between the inner side wall of the rotor back plate and the pressing block, the fastener is fixed on the rotor back plate, the pressing block is driven by the fastener to extrude the magnetic steel in the fastening process, the magnetic steel is firmly locked on the rotor back plate, and the position fixation of the magnetic steel also realizes the limit of the magnetic conducting plate. The rotor back plate, the fastener, the pressing block and the magnetic steel form a complete force transmission path, the magnetic conduction plate and the magnetic steel are reliably and mechanically fixed, the fastening reliability is higher, and the stability of the rotor is greatly improved.

Drawings

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

fig. 2 is a front view of the present invention;

FIG. 3 is a left side sectional view of FIG. 2;

FIG. 4 is a schematic diagram of a transition ring;

FIG. 5 is a left side cross-sectional view of the transition ring;

FIG. 6 is a left cross-sectional view of the pressure ring;

fig. 7 is a schematic structural view of a rotor back plate.

Detailed Description

The rotor of the disc type motor comprises a rotor back plate 10, magnetic conduction plates 20 and magnetic steels 30, wherein the rotor back plate 10 is an open shell, the magnetic conduction plates 20 are integrally cylindrical, the magnetic conduction plates 20 are arranged in a cavity of the rotor back plate 10, the magnetic steels 30 are provided with two or more than two, the magnetic steels 30 are attached to the surface of one side, close to the opening of the rotor back plate 10, of the magnetic conduction plates 20, the magnetic steels 30 are evenly arranged at intervals along the circumferential direction of the magnetic conduction plates 20, the outer annular surface 31 of each magnetic steel 30 abuts against the inner side wall 13 of the rotor back plate 10, pressing blocks 40 are arranged beside the inner annular surface 32 of each magnetic steel 30, fastening pieces 50 are arranged beside the pressing blocks 40, and the fastening pieces 50 drive the pressing blocks 40 to extrude the magnetic steels 30 towards one side of the inner side wall 13 of the rotor back plate 10 in the fastening process.

The thickness of the pressing block 40 is not higher than that of the magnetic steel 30, so that interference is prevented. Meanwhile, the pressing block 40 should be smooth and burr-free, so that the situation that burrs fall between the magnetic steel 30 and the pressing block 40 to cause unreliable surface-to-surface contact and influence precision and stability is avoided.

The magnetic steel is extruded between the inner side wall of the rotor back plate and the pressing block, the fastener is fixed on the rotor back plate, the pressing block is driven by the fastener to extrude the magnetic steel in the fastening process, the magnetic steel is firmly locked on the rotor back plate, and the position fixation of the magnetic steel realizes the limitation of the magnetic conduction plate. The rotor back plate, the fastener, the elastic clamp and the magnetic steel form a complete force transmission path, the magnetic conduction plate and the magnetic steel are reliably and mechanically fixed, the fastening reliability is higher, and the stability of the rotor is greatly improved.

Briquetting 40 be provided with a plurality ofly, and along the even interval distribution of interior anchor ring 32 of magnet steel 30, a plurality of briquetting 40's inboard sets up clamping ring 60, fastener 50 set up at clamping ring 60 side and be used for driving clamping ring 60 towards inside wall 13 one side extrusion magnet steel 30. The position of the pressing block 40 corresponds to the position between two adjacent magnetic steels 30, so that a small amount of displacement during the assembly of the magnetic steels 30 can be compensated by reasonably utilizing the gap between the magnetic steels 30, and meanwhile, the phenomena that the magnetic steels 30 are broken and the like due to the fact that the extrusion force is concentrated on the same magnetic steel 30 are avoided.

The pressing blocks 40 are all fixed on the pressing ring 60. The pressing block 40 and the pressing ring 60 can be made into a separate structure, or can be made into an integral structure, and the latter is preferred by the utility model. The integrated structure is easy to form and convenient to process, and above all, the number of parts is small, the assembly difficulty is reduced, and the assembly efficiency is improved.

The inner ring of the pressure ring 60 is provided with a transition ring 70, the outer ring wall of the transition ring 70 is abutted against the inner ring wall of the pressure ring 60, and the fastener 50 is arranged beside the transition ring 70 and used for driving the transition ring 70 to extrude the pressure ring 60 towards one side of the inner side wall 13.

The pressing block 40 is provided with an inclined surface 41 which is inclined from top to bottom, and the inclination amplitude of the inclined surface 411 is close to the radian of the inner annular surface 32 of the magnetic steel 30. It can also be said that the inclined plane 41 and the pressing block 40 are inclined at the same angle, so as to ensure the contact between the inclined plane 41 and the pressing block 40 as much as possible. The pressing block 40 is provided with two inclined surfaces 41 which incline towards two sides respectively, so that the two inclined surfaces 41 of one pressing block 40 can be matched with the inner ring surfaces of two adjacent magnetic steels respectively. That is, one pressing block 40 can press two adjacent magnetic steels 30 at the same time.

The transition ring 70 is provided with through holes 71 for fixing the fasteners 50, the fasteners 50 are inserted into the through holes 71, the tail ends of the fasteners 50 are fixed on the rotor back plate 10, the through holes 71 are countersunk, the fasteners 50 are provided with inclined planes matched with the through holes 71 in inclination angles, and the number and the positions of the through holes 71 correspond to the pressing blocks 40. Due to the limited size of this structure on the rotor, it is not desirable to oversize the fasteners 50, but too small a fastener 50 size may result in insufficient strength. So the utility model discloses set up countersunk hole's purpose and be concave in countersunk hole with fastener 50's head, just so can reduce the axial direction size that fastener 50 occupy, satisfy the strength requirement simultaneously. The driving pressure ring 60 and the transition ring 70 are made of materials which can bear a small amount of deformation and have strength, the yield strength of the selected materials is smaller than that of the magnetic steel, and the selected materials have certain fatigue resistance, preferably aluminum alloy.

The utility model discloses an outer lane of transition ring 70 be provided with outer chamfer face 72, this outer chamfer face 72 is arranged towards center one side slope from the edge of rotor, the inner circle of clamping ring 60 be provided with interior chamfer face 61, interior chamfer face 61 and outer chamfer face 72 phase-match.

Rotor backplate 10's cavity in be provided with the annular boss 11 of two-stage step form, the shaft hole 12 that is used for supplying the axle to pass is offered at the middle part of annular boss 11, 14 at the bottom of the chamber that the one-level step 111 of annular boss 11 is close to

rotor backplate

10, 14 and the diameter that is greater than second grade step 112 at the bottom of the diameter of one-level step 111 is less than the chamber, 14 and one-level step 111 between the annular region that forms be used for holding magnetic conduction plate 20 at the bottom of the chamber, clamping ring 60, transition ring 70 all overlap and establish on second grade step 112, and clamping ring 60, transition ring 70 annular surface subsides are put on the step face of one-level step 111, the inner circle of transition ring 70 is attached on the lateral wall of second grade step 112. The inner side wall of the shaft hole 12 is provided with a key slot, and the rotating shaft of the motor is matched with the 12 keys of the shaft hole.

The gap between the transition ring 70 and the step surface of the first-stage step 111 is 1-1.5mm, and the inclination angle of the inner chamfer surface 61 and the outer chamfer surface 72 is less than 45 degrees, preferably 30 degrees. The gap between the transition ring 70 and the step surface of the first step 111 is set to ensure that the pressing block 40 does not press the magnetic steel yet, and the transition ring 70 is already pressed against the step surface of the first step 111, so that the pressing force on the magnetic steel 30 is insufficient, and the fixation is unreliable. Therefore, enough clearance must be left between the transition ring 70 and the step surface of the first step 111, but the rotor volume is increased due to the excessive clearance, and the clearance is more preferably 1-1.5mm through a plurality of experiments.

The fastener 50 is a countersunk head screw, and the head inclination angle of the countersunk head screw is consistent with the inclination angle of the through hole 71. The rotor back plate 10 is provided with a plurality of threaded holes 15 for fixing the fasteners 50, the plurality of threaded holes 15 are uniformly distributed on the first-stage step 111 along the circumferential direction at intervals, and the threaded holes 15 are in threaded fit with the tail ends of the fasteners 50.

The utility model discloses choose for use the countersunk head screw as fastener 50 because the countersunk head screw is standard part commonly used, the cost is lower relatively. And the rotor is easy to purchase in the market, and special customization is not needed, so that the aim of reducing the processing cost of the rotor is fulfilled, and the contribution to increasing the market competitiveness of products is made. The threaded holes 15 are circumferentially distributed along the first-stage step 111, the specific positions of the threaded holes 15 correspond to the positions between two adjacent magnetic steels 30, the fastening pieces 50 penetrate through the through holes 71 and then are inserted into the threaded holes 15, and the fastening pieces 50 and the threaded holes 12 form threaded matching.

Claims

1. The utility model provides a rotor of disk motor, includes rotor backplate (10), magnetic conduction board (20) and magnet steel (30), rotor backplate (10) be opening form casing, magnetic conduction board (20) are whole to be cylindricly, in the cavity of rotor backplate (10) is arranged in magnetic conduction board (20), its characterized in that: magnet steel (30) be provided with two and more than two, magnet steel (30) are attached on the surface that magnetic conduction board (20) is close to rotor backplate (10) opening part one side, and a plurality of magnet steel (30) evenly arrange along the circumference of magnetic conduction board (20) at an interval, outer anchor ring (31) of magnet steel (30) support and lean on inside wall (13) of rotor backplate (10), inner anchor ring (32) side of magnet steel (30) is provided with briquetting (40), briquetting (40) side is provided with fastener (50), this fastener (50) are at the in-process drive briquetting (40) of fastening and extrude magnet steel (30) towards inside wall (13) one side of rotor backplate (10).

2. The rotor of a disc motor according to claim 1, characterized in that: briquetting (40) be provided with a plurality ofly, and along the even interval distribution of interior anchor ring (32) of magnet steel (30), the inboard of a plurality of briquetting (40) sets up clamping ring (60), fastener (50) set up at clamping ring (60) side and be used for driving clamping ring (60) towards inside wall (13) one side extrusion magnet steel (30).

3. The rotor of a disc motor according to claim 1, characterized in that: the pressing blocks (40) are all fixed on the pressing ring (60).

4. The rotor of a disc motor according to claim 2 or 3, characterized in that: the inner ring of the pressure ring (60) is provided with a transition ring (70), the outer annular wall of the transition ring (70) abuts against the inner annular wall of the pressure ring (60), and the fastener (50) is arranged beside the transition ring (70) and used for driving the transition ring (70) to extrude the pressure ring (60) towards one side of the inner side wall (13).

5. The rotor of a disc motor according to claim 4, characterized in that: the pressing block (40) is provided with an inclined surface (41) which is inclined from top to bottom, and the inclination amplitude of the inclined surface (41) is close to the radian of the inner ring surface (32) of the magnetic steel (30).

6. The rotor of a disc motor according to claim 5, characterized in that: the transition ring (70) is provided with through holes (71) for fixing fasteners (50), the fasteners (50) are inserted into the through holes (71) and the tail ends of the fasteners are fixed on the rotor back plate (10), the through holes (71) are countersunk, inclined planes matched with the inclined angles of the through holes (71) are arranged on the fasteners (50), and the number and the positions of the through holes (71) correspond to the pressing blocks (40).

7. The rotor of a disc motor according to claim 6, characterized in that: the outer ring of transition ring (70) be provided with outer chamfer face (72), this outer chamfer face (72) is arranged towards center one side slope from the edge of rotor, the inner circle of clamping ring (60) be provided with interior chamfer face (61), interior chamfer face (61) and outer chamfer face (72) phase-match.

8. The rotor of a disc motor according to claim 7, characterized in that: the cavity of rotor backplate (10) in be provided with annular boss (11) of two-stage step form, shaft hole (12) that are used for supplying the axle to pass are offered at the middle part of annular boss (11), and one-level step (111) of annular boss (11) are close to at the bottom of the chamber (14) of rotor backplate (10), and the diameter of one-level step (111) is less than at the bottom of the chamber (14) and is greater than the diameter of second grade step (112), the annular region that forms between chamber at the bottom of (14) and one-level step (111) be used for holding magnetic conduction board (20), clamping ring (60), transition ring (70) all overlap and establish on second grade step (112), and clamping ring (60), transition ring (70) annular surface subsides are put on the step face of one-level step (111), the inner circle of transition ring (70) is attached on the lateral wall of second grade step (112).

9. The rotor of a disc motor according to claim 8, characterized in that: the gap between the transition ring (70) and the step surface of the first-stage step (111) is 1-1.5mm, and the inclination angle of the inner chamfer surface (61) and the outer chamfer surface (72) is less than 45 degrees.

10. The rotor of a disc motor according to claim 9, characterized in that: the fastener (50) is a countersunk head screw, and the inclination angle of the head of the countersunk head screw is consistent with that of the through hole (71);

the rotor back plate (10) is provided with a threaded hole (15) for fixing a fastener (50), the threaded hole (15) is provided with a plurality of steps (111) which are uniformly distributed at intervals along the circumferential direction, and the tail ends of the threaded hole (15) and the fastener (50) form threaded fit.