CN209767259U

CN209767259U - Split rotor

Info

Publication number: CN209767259U
Application number: CN201920913509.3U
Authority: CN
Inventors: 冯佳慧; 王富冈; 丁维超
Original assignee: Jiangsu Leili Motor Co Ltd
Current assignee: Jiangsu Leili Motor Co Ltd
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2019-12-10
Anticipated expiration: 2029-06-18

Abstract

The utility model discloses a split type rotor, it includes magnetic ring and rotor injection molding body, the rotor injection molding body is inside to be equipped with and to be used for holding the rotor and mould a mounting cavity of piece and elastic element, elastic element's one end sets up in the elastic element installation department that the piece was moulded to the rotor, elastic element's other end butt is on the chamber wall relative with the elastic element installation department of mounting cavity, elastic element moulds the piece with the direction compression rotor of perpendicular to axis and makes the rotor mould the shaft hole of the components of a whole that can function independently that the rotor shaft passed between the piece and the rotor injection molding body. The utility model provides a split type rotor has effectively improved impact sound and noise among the rotor operation process.

Description

split rotor

Technical Field

The utility model relates to a split type rotor belongs to electric motor rotor technical field.

background

At present, the big electric motor rotor both ends on the market all adopt the bearing fixed, and the bearing clearance is little, operates steadily, and the vibration is little, so the operation is that the noise is less, current micromotor (step-by-step or synchronous machine), because the less reason of motor structure, the rotor that uses is the integral type injection structure generally, and the defect of this kind of integral type injection structure rotor is: the aperture uniformity of the central hole is poor, because the injection molding aperture of the rotor is longer, the upper part of the rotor structure is provided with a gear, for reducing the torque loss of the motor, the gear part on the rotor is generally designed to be smaller, the rotor injection molding body is larger, the wall thickness is not uniform, the material is fewer, the upper shrinkage and the lower shrinkage of the rotor injection molding body are inconsistent, the aperture of the central hole is inconsistent, a gap is formed between the rotor shaft and the central hole of the rotor, the high-speed running process of the rotor is realized, larger noise is generated between the rotor and the rotor shaft, and if the rotor is larger, the rotor is easy to generate impact sound of the rotor with the rotor shaft.

disclosure of Invention

The utility model aims to solve the technical problem that, overcome prior art not enough, provide a split type rotor, effectively improved impact sound and noise among the rotor operation process.

In order to solve the technical problem, the technical scheme of the utility model is that:

The utility model provides a split type rotor, it includes magnetic ring and rotor injection molding body, the inside installation cavity that is used for holding rotor plastic piece and spring that is equipped with of rotor injection molding body, elastic element's one end sets up in the elastic element installation department that the rotor plastic piece, elastic element's other end butt is on the chamber wall relative with the elastic element installation department of installation cavity, elastic element moulds the piece with the direction compression rotor of perpendicular to axis and makes the rotor mould the shaft hole of the components of a whole that can function independently that the rotor shaft passed between piece and the rotor injection molding body.

furthermore, the rotor injection molding body is injected on the magnetic ring, magnetic ring counter bores are formed in the two ends of the magnetic ring, protrusions are evenly arranged on the magnetic ring counter bores, and the two ends of the rotor injection molding body are clamped with the end faces of the magnetic ring counter bores.

Furthermore, the upper surface integrated into one piece of rotor injection molding has the gear, the gear center is equipped with the gear centre bore.

Further, the central hole of the gear is a complete round hole.

Furthermore, the installation cavity is located one side of the axial center of the rotor injection molding body, the inner wall of the installation cavity is smooth, and the upper end and the lower end of the other side of the axial center of the rotor injection molding body are provided with injection molding body shrinkage-proof characteristic holes.

Further, elastic element is the spring, the one side that deviates from the rotor shaft at the rotor plastic part is moulded to the elastic element installation department setting, the middle part of elastic element installation department is provided with the spring counter bore, the internal diameter more than or equal to the external diameter of spring counter bore.

Furthermore, a boss is arranged on the spring counter bore, and the diameter of the boss is smaller than the inner diameter of the spring.

Furthermore, the two ends of the elastic element mounting part are provided with anti-shrinkage characteristic holes of the plastic parts, and the anti-shrinkage characteristic holes of the plastic parts are positioned on the two sides of the spring counter bore.

Furthermore, one side of the rotor plastic part facing the rotor shaft is axially provided with a V-shaped groove, and the middle of the V-shaped groove is deeper than the upper end and the lower end.

furthermore, the axial center of the rotor injection molding body is provided with a semicircular hole, and the semicircular hole is opposite to the V-shaped groove.

By adopting the technical scheme, the rotor plastic part is pressed tightly by the spring inside the utility model, so that the rotor plastic part is prevented from falling off in the operation process; the V-shaped groove of the rotor plastic part is tightly attached to the rotating mandrel, so that the operation is reliable; in the operation process, the split rotor and the rotor shaft operate in a zero clearance mode, the rotor cannot rock on the core shaft, rotor impact sound cannot be generated, and the noise of the motor is effectively reduced.

Drawings

Fig. 1 is a perspective view of a split rotor of the present invention;

FIG. 2 is a bottom view of FIG. 1;

Fig. 3 is an exploded view of the split rotor of the present invention;

Fig. 4 is a schematic view of the internal structure of the split rotor of the present invention;

fig. 5 is a schematic structural view of the magnetic ring of the present invention;

Fig. 6 is a schematic structural view of the semicircular hole of the present invention;

Fig. 7 is a schematic view of the internal structure of the rotor plastic part of the present invention;

Fig. 8 is a perspective view of the rotor plastic part of the present invention;

Fig. 9 is a schematic view of the rotor shaft and the rotor plastic part of the present invention;

fig. 10 is a schematic diagram comparing the matching positions of the rotor shaft and the rotor plastic part according to the present invention;

Fig. 11 is a schematic structural view of the elastic member mounting portion of the present invention;

FIG. 12 is a schematic view of the internal structure of FIG. 11;

Fig. 13 is a movement state diagram of the rotor shaft of the present invention;

Fig. 14 is a partially enlarged view of fig. 13.

Detailed Description

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.

As shown in fig. 1 to 14, a split rotor includes a magnetic ring 1 and a rotor injection molded body 2, the rotor injection molded body 2 is injection molded on the magnetic ring 1 through an injection molding process, an installation cavity 21 for accommodating a rotor plastic part 3 and an elastic element is arranged inside the rotor injection molded body 2, one end of the elastic element is arranged in an elastic element installation part 31 of the rotor plastic part 3, the other end of the elastic element abuts against a cavity wall of the installation cavity 21 opposite to the elastic element installation part 31, the elastic element is a spring 4, and the spring 4 compresses the rotor plastic part 3 in a direction perpendicular to an axis to form a split shaft hole for a rotor shaft 5 to pass through between the rotor plastic part 3 and the rotor injection molded body 2.

As shown in fig. 1 to 5, the rotor injection molded body 2 is injection molded on the magnetic ring 1, magnetic ring counter bores 11 are formed at both ends of the magnetic ring 1, protrusions 12 are uniformly formed in the magnetic ring counter bores 11 to prevent the rotor injection molded body 2 from slipping due to tangential force during operation, and the magnetic ring counter bores are formed at both ends of the magnetic ring 1. The two ends of the rotor injection molding body 2 are hooked on the end faces of the magnet ring counter bores 11, so that the rotor injection molding body 2 is prevented from falling off from the magnet ring 1 after the split rotor operates for a long time, and the rotor injection molding body 2 and the magnet ring 1 are connected reliably after injection molding.

As shown in fig. 1 and 4, a gear 6 is integrally formed on the upper surface of the rotor injection molding body 2, a gear center hole 61 is formed in the center of the gear 6, the gear center hole 61 is a complete circular hole, only the centers of the gear 6 and a necessary connection part are complete circular holes, other places are semicircular holes, the hole depth is short, a mandrel on a mold is short, the processing is convenient, and the mandrel has good rigidity and is not easy to break in the injection molding process; the central hole 61 of the gear is a whole hole, the wall thickness is uniform, the shrinkage is uniform during injection molding, the size is easy to control, and the quality of a produced finished product is high.

As shown in fig. 4, the mounting cavity 21 is located at one side of the axial center of the rotor injection molded body 2, the inner wall of the mounting cavity 21 is smooth, the mold is convenient to manufacture, and the rotor plastic part 3 and the spring 4 are convenient to mount. Both ends all are provided with injection molding body shrinkage prevention characteristic hole 7 about the opposite side of 2 axial centers of rotor injection molding body, guarantee that the wall thickness of rotor injection molding body 2 is even to guarantee the size of product.

As shown in fig. 6, 7, 11, 12, the rotor is moulded one side that 3 deviates from rotor shaft 5 and is provided with elastic element installation department 31, the middle part of elastic element installation department 31 is provided with spring counter bore 32, the internal diameter more than or equal to spring 4's of spring counter bore 32 external diameter, be provided with the boss on the spring counter bore 32, the diameter of boss is less than spring 4's internal diameter, guarantees spring 4 and does not drop or slope in installation and use, and spring 4 compresses along elastic element installation department 31's axis in the compression process, and it drops when preventing spring 4 compression.

as shown in fig. 11, the elastic element mounting portion 31 is provided with a plastic anti-shrinkage characteristic hole 311, and the plastic anti-shrinkage characteristic holes 311 are located at two sides of the spring counterbore 32, so as to ensure that the wall thickness of the rotor plastic 3 is uniform, thereby ensuring the size of the product.

As shown in fig. 7 and 8, the axial center of the rotor injection molded body 2 is provided with a semicircular hole 33, and the semicircular hole 33 is opposite to the V-shaped groove 34. In the mould structure, the semicircular hole 33, the mounting spring 4 and the mounting cavity 21 of the rotor plastic part 3 are integrally formed, so that the rigidity is better and the size is stable. The semicircular hole 33 is designed into a semicircle or a minor arc, so that the installation is convenient. One side axial of rotor plastic-molded component 3 towards rotor shaft 5 is provided with V type groove 34, the centre of V type groove 34 is than upper and lower both ends dark, reduces the area of contact in rotor shaft 5 and shaft hole, reduces the friction, and the centre can also store grease, keeps lubricated persistence.

as shown in fig. 13 and 14, in the drawings, a is an actual position of the rotor plastic part 3, b is a theoretical position of the rotor plastic part 3, and c is a position of an ideal rotor shaft, since the theoretical diameter of the rotor shaft 5 in actual production cannot be completely consistent with the actual diameter, and may be larger or smaller, the rotor plastic part 3 can move in the spring 4 of the rotor injection molded body 2 and the mounting cavity 21 of the rotor plastic part 3 under the pressure of the spring 4, and the rotor plastic part 3 is designed with a V-shaped groove 34 which is matched with a semicircular hole 33 of the rotor injection molded body 2, so that the center can be quickly aligned, and the mounting is convenient. The spring 4 compresses the rotor plastic part 3, so that the V-shaped groove 34 of the rotor plastic part 3 is tightly attached to the rotor shaft 5, the split rotor always has 3 buses d in contact with the rotor shaft 5 in the operation process, and the operation is reliable. In the running process of the motor, the split rotor and the rotor shaft 5 run in zero clearance, the rotor cannot rock on the core shaft, rotor impact sound cannot be generated, and the noise of the motor is effectively improved.

the above-mentioned embodiments further explain in detail the technical problems, technical solutions and advantages solved by the present invention, and it should be understood that the above only is a specific embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A split rotor, comprising: it includes magnetic ring (1) and rotor injection molding (2), rotor injection molding (2) inside is equipped with and is used for holding rotor and moulds a (3) and elastic element's installation cavity (21), elastic element's one end sets up in elastic element installation department (31) of a (3) is moulded to the rotor, elastic element's the other end butt is on the chamber wall relative with elastic element installation department (31) of installation cavity (21), elastic element moulds a (3) with the direction compression rotor of perpendicular to axis and makes rotor mould a (3) and form the shaft hole of the components of a whole that can function independently that supplies rotor shaft (5) to pass between rotor injection molding (2).

2. The split rotor of claim 1, wherein: the rotor injection molding body (2) is injected on the magnetic ring (1), magnetic ring counter bores (11) are formed in two ends of the magnetic ring (1), protrusions (12) are evenly arranged on the magnetic ring counter bores (11), and two ends of the rotor injection molding body (2) are clamped with the end faces of the magnetic ring counter bores (11).

3. The split rotor of claim 1, wherein: the upper surface of the rotor injection molding body (2) is integrally formed with a gear (6), and a gear center hole (61) is formed in the center of the gear (6).

4. The split rotor of claim 3, wherein: the gear central hole (61) is a complete round hole.

5. The split rotor of claim 1, wherein: the mounting cavity (21) is located on one side of the axial center of the rotor injection molding body (2), the inner wall of the mounting cavity (21) is smooth, and shrinkage-resistant characteristic holes (7) of the injection molding body are formed in the upper end and the lower end of the other side of the axial center of the rotor injection molding body (2).

6. The split rotor of claim 1, wherein: elastic element is spring (4), elastic element installation department (31) set up the one side that deviates from rotor shaft (5) at rotor plastic (3), the middle part of elastic element installation department (31) is provided with spring counter bore (32), the external diameter of the internal diameter more than or equal to spring (4) of spring counter bore (32).

7. The split rotor of claim 6, wherein: the spring counter bore (32) is provided with a boss, and the diameter of the boss is smaller than the inner diameter of the spring (4).

8. the split rotor of claim 6, wherein: the elastic element mounting part (31) is provided with a plastic part anti-shrinkage characteristic hole (311), and the plastic part anti-shrinkage characteristic hole (311) is located on two sides of the spring counter bore (32).

9. The split rotor of claim 1, wherein: one side of the rotor plastic part (3) facing the rotor shaft (5) is axially provided with a V-shaped groove (34), and the middle of the V-shaped groove (34) is deeper than the upper end and the lower end.

10. The split rotor of claim 9, wherein: the axial center of rotor injection molding body (2) is provided with semicircle orifice (33), semicircle orifice (33) are relative with V type groove (34).