CN219918542U - Motor rotor structure, motor and vehicle - Google Patents

Abstract

The utility model provides a motor rotor structure, a motor and a vehicle, which comprise a plurality of sections of iron cores which are arranged in a stacked manner, a rotating shaft penetrating through the center of the iron cores, two balance plates sleeved at two ends of the rotating shaft respectively, and two pressing plates positioned at the outer sides of the balance plates in one-to-one correspondence, wherein each section of iron core is provided with a magnetic steel which penetrates through in an axial direction, and an adhesive layer is arranged between the balance plates and the iron cores and between two adjacent sections of iron cores; the iron core is also provided with a lightening hole in a penetrating way, the balance plate is provided with a corresponding hole correspondingly communicated with the lightening hole, and the corresponding hole and the lightening hole are internally provided with a plastic reinforcing part extending along the axial direction of the rotating shaft. According to the motor rotor structure provided by the utility model, the adhesive layer is arranged to prevent the iron core from generating gaps between segments in the segmented lamination process, and the plastic reinforcing part can form a structural reinforcing effect in the rotor structure, so that the structural rigidity of the rotor is effectively increased, the lamination quality of the rotor structure is improved, and the noise and vibration problems of the rotor are fundamentally restrained.

Description

Motor rotor structure, motor and vehicle

Technical Field

The utility model belongs to the technical field of motor rotors, and particularly relates to a motor rotor structure, a motor and a vehicle.

Background

The rotor is used as a core component of the motor and has important influence on the NVH performance of the electric drive. If the natural frequency of the motor rotor and the electromagnetic excitation frequency are close or in multiple relation, obvious noise vibration phenomena of the motor, especially characteristic order noise vibration problems related to the rotor, occur.

In the prior art, a rotor of a permanent magnet synchronous motor is formed by laminating a segmented iron core structure, each iron core is formed by a plurality of silicon steel sheets, the iron core structure is mostly in interference fit with a rotating shaft to achieve structural integrity, after the iron cores are laminated to the rotating shaft, a pressing machine retreats, as the iron cores have larger elasticity in the normal direction of the plane of the iron cores, the iron cores have rebound phenomena with different degrees, gaps are finally generated among iron core segments, contact surfaces among the iron cores are reduced, and the rigidity of a rotor assembly is greatly reduced. Therefore, the process can realize stable connection of the iron core and the rotating shaft, but has the problem of insufficient rigidity, and is easy to be excited by electromagnetic force, so that the problem of noise vibration of the motor is generated.

Disclosure of Invention

The utility model aims to provide a motor rotor structure, a motor and a vehicle, wherein the rigidity of the rotor structure can be effectively improved by arranging an adhesive layer and a plastic reinforcing part, and noise and vibration can be effectively restrained.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the motor rotor structure comprises a plurality of sections of iron cores which are arranged in a laminated mode, a rotating shaft penetrating through the center of the iron cores, two balance plates sleeved at two ends of the rotating shaft respectively and two pressing plates located on the outer sides of the balance plates in a one-to-one correspondence mode, wherein magnetic steel which is penetrated in the axial direction is arranged on each section of iron core in a penetrating mode, and adhesive layers are arranged between the balance plates and the iron cores and between two adjacent sections of iron cores;

the iron core is further provided with a lightening hole located on the inner side of the magnetic steel in a penetrating mode, the balance plate is provided with a corresponding hole correspondingly communicated with the lightening hole, and plastic reinforcing parts extending along the axial direction of the rotating shaft are arranged in the corresponding hole and the lightening hole.

In one possible implementation, the adhesive layer is disposed near the outer ring of the core, and the area of the adhesive layer is greater than 1/2 of the area of the end face of the core.

In some embodiments, the lightening holes are distributed in a plurality along the circumferential direction of the iron core at intervals, and the intervals between two adjacent lightening holes are equal.

In some embodiments, the lightening holes are triangular, and the corner points of the lightening holes are provided with arc transitions.

In one possible implementation, the plastic reinforcement is an injection molded material component.

In one possible implementation, the balance plate has an outer diameter equal to the outer diameter of the core and the platen has an outer diameter smaller than the outer diameter of the core.

In one possible implementation manner, from the middle part of the rotating shaft to the end part of the rotating shaft, a certain rotation deflection angle is formed between two adjacent sections of iron cores, and the lightening holes of the two adjacent sections of iron cores are at least partially communicated.

In one possible implementation manner, two ends of the rotating shaft are respectively provided with shaft ends for installing a pressing plate, the pressing plate is in interference fit with the shaft ends of the rotating shaft, and the inner end surface of the pressing plate is respectively in contact fit with the outer end surface of the rotating shaft and the outer end surface of the balance plate.

Compared with the prior art, the motor rotor structure provided by the embodiment of the utility model has the advantages that the inner end surface of the balance plate is tightly adhered to the outer end surface of the iron core and the adjacent end surfaces of the two sections of iron cores are tightly adhered by arranging the adhesive layers between the balance plate and the iron core and between the adjacent two sections of iron cores, so that the intersegmental gaps generated by rebound of the iron cores in the segmented lamination process are avoided, the plastic reinforcing part can form a structural reinforcing effect in the rotor structure, the structural rigidity of the rotor is effectively increased, the lamination quality of the rotor structure is improved, the noise and vibration problems of the rotor are fundamentally restrained, and the integral performance of the rotor structure is improved.

The utility model also provides a motor, which comprises a motor rotor structure. According to the motor rotor structure of the motor, the bonding layer is arranged between the balance plate and the iron core and between the two adjacent sections of iron cores, so that the problem of intersegmental gaps between the balance plate and the iron core and between the two adjacent sections of iron cores is avoided, the lamination quality of the rotor structure is improved, the structural rigidity of the rotor is increased, the noise and vibration problems of the rotor are fundamentally restrained, and the overall performance of the motor is improved.

The utility model also provides a vehicle, which comprises the motor. The motor of the vehicle has the characteristics of small noise, small vibration and the like, and the structural rigidity of the rotor is enhanced by improving the lamination quality of the inner rotor structure of the motor, so that the clicking and the stable running of the vehicle are ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a front cross-sectional structure of a motor rotor structure according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of A-A of FIG. 1 in accordance with an embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of B-B in FIG. 1 according to an embodiment of the present utility model.

Wherein, each reference sign in the figure:

1. an iron core; 11. a lightening hole; 12. magnetic steel; 2. a rotating shaft; 21. a shaft end; 3. a balance plate; 31. a corresponding hole; 4. a pressing plate; 5. an adhesive layer; 6. plastic reinforcement.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the claims, the specification and the drawings of the utility model, the terms "front" and "rear" are the same as the front-rear direction of the vehicle body, the terms "left" and "right" are the same as the left-right direction of the vehicle body, and the terms "up" and "down" are the same as the up-down direction of the vehicle body; the term "inner" refers to a direction toward the central axis of the body and the term "outer" refers to a direction away from the central axis of the body, wherein the central axis of the body is parallel to the fore-aft direction of the body. The use of the terms "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "clockwise," "counterclockwise," "high," "low," etc. to indicate a position or a positional relationship is based on the position and positional relationship shown in the drawings, unless otherwise explicitly defined, and is merely for convenience of description and to simplify the description, as opposed to indicating or implying that the apparatus or elements so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the specific scope of the utility model.

Referring to fig. 1 to 3, a motor rotor structure, a motor and a vehicle provided by the utility model will now be described. The motor rotor structure comprises a plurality of sections of iron cores 1 which are arranged in a laminated manner, a rotating shaft 2 which penetrates through the center of the iron cores 1, two balance plates 3 which are respectively sleeved at two ends of the rotating shaft 2, and two pressing plates 4 which are positioned at the outer sides of the balance plates 3 in a one-to-one correspondence manner, wherein each section of iron cores 1 is provided with a magnetic steel 12 which penetrates through in an axial direction, and an adhesive layer 5 is arranged between each balance plate 3 and each iron core 1 and between every two adjacent sections of iron cores 1;

the iron core 1 is further provided with a lightening hole 11 located at the inner side of the magnetic steel 12 in a penetrating manner, the balance plate 3 is provided with a corresponding hole 31 correspondingly communicated with the lightening hole 11, and the corresponding hole 31 and the lightening hole 11 are internally provided with a plastic reinforcing part 6 extending along the axial direction of the rotating shaft 2.

Compared with the prior art, the motor rotor structure provided by the embodiment has the advantages that the adhesive layer 5 is arranged between the balance plate 3 and the iron core 1 and between the adjacent two sections of the iron cores 1, so that the inner end face of the balance plate 3 is tightly adhered to the outer end face of the iron core 1, the adjacent end faces of the two sections of the iron cores 1 are tightly adhered, intersegmental gaps caused by rebound of the iron cores 1 in the sectionalized lamination process are avoided, the plastic reinforcing part 6 can form a structural reinforcing effect in the rotor structure, the structural rigidity of the rotor is effectively increased, the lamination quality of the rotor structure is improved, the noise and vibration problems of the rotor are fundamentally restrained, and the overall performance of the rotor structure is improved.

In this embodiment, the iron core 1 is provided with the lightening hole 11, and the lightening hole 11 can reduce the weight of the iron core 1 on one hand, thereby reducing the material consumption of the iron core 1. On this basis, the lightening holes 11 can also effectively correspond to the corresponding holes 31 of the balance plate 3, so that plastic materials can be conveniently poured into the lightening holes 11 and the corresponding holes 31, and plastic reinforcing parts 6 are formed in the lightening holes 11 and the corresponding holes 31, so that the iron core 1 is prevented from bouncing after lamination, the overall rigidity of the rotor structure is ensured, and the rotor structure is prevented from generating excessive noise and vibration.

The plastic reinforcing portion 6 forms a columnar member extending in the circumferential direction of the iron cores 1, and can fix the relative positions of the iron cores 1, thereby avoiding noise and vibration caused by gaps between two adjacent sections of the iron cores 1.

It should be noted that each section of iron core 1 is formed by stacking a plurality of silicon steel sheets, two adjacent silicon steel sheets are connected by riveting, and the lightening holes 11 are formed by penetrating the plurality of silicon steel sheets on the same iron core 1 and are formed by penetrating in the axial direction of the iron core 1.

In this embodiment, not only the two adjacent sections of iron cores 1 are adhered and fixed by the adhesive layer 5, but also the weight reducing holes 11 communicated with the corresponding holes 31 are filled with the injection molding material by injecting the injection molding material, after the injection molding material is solidified, the injection molding material is returned to the press, so that the inter-section gaps generated by rebound of the iron cores 1 after pressure relief can be completely eliminated, and finally, plastic reinforcing parts 6 are formed in the multi-section iron cores 1 and the balance plates 3 at the two ends, so that reliable connection is formed between the two adjacent sections of iron cores 1 and between the iron cores 1 and the balance plates 3, the overall rigidity of the rotor structure is effectively improved, the lamination quality between the multi-section iron cores 1 is ensured, and the generation of noise and vibration is fundamentally inhibited.

The number of the lightening holes 11 and the corresponding holes 31 are equal and are arranged in a one-to-one correspondence manner, the lightening holes 11 are at least arranged two in the circumferential direction of the iron core 1, the arrangement number of the plastic reinforcing parts 6 is ensured, and the overall rigidity of the rotor structure is ensured.

In one possible implementation, the feature adhesive layer 5 may take the structure shown in fig. 1 to 3. Referring to fig. 1 to 3, an adhesive layer 5 is provided near the outer circumference of the core 1, and the area of the adhesive layer 5 is greater than 1/2 of the end surface area of the core 1.

In this embodiment, the connection between two adjacent segments of the cores 1 will be described as an example. The adhesive layer 5 is arranged near the outer ring of the iron core 1, avoids the position of the iron core 1 near the rotating shaft 2, and ensures that the end surfaces of two adjacent sections of iron cores 1 are effectively adhered and fixed. On the basis, the area of the adhesive layer 5 on the end face of the iron core 1 should be larger than 1/2 of the whole end face area of the iron core 1, so that the adjacent end faces of the two adjacent sections of iron cores 1 are ensured to have reliable adhesive action.

In some embodiments, the above-mentioned characteristic iron core 1 may have a structure as shown in fig. 1 to 3. Referring to fig. 1 to 3, the lightening holes 11 are arranged in a plurality at intervals along the circumferential direction of the core 1, and the intervals between adjacent two lightening holes 11 are equal.

In this embodiment, a plurality of lightening holes 11 are arranged at intervals in the circumferential direction of the iron core 1, and the plurality of lightening holes 11 spaced from each other can form lightening treatment on different positions in the circumferential direction of the iron core 1, so that the attenuation of local strength of the iron core 1 caused by excessive concentration of the positions of the lightening holes 11 is avoided.

In some embodiments, the above-described characteristic weight-reducing hole 11 may be constructed as shown in fig. 1 to 3. Referring to fig. 1 to 3, the lightening holes 11 are triangular, and the corner points of the lightening holes 11 are provided with arc transitions. The section of the lightening hole 11 is triangular, the corner point of the triangle is provided with arc transition, stress concentration at the corner point of the lightening hole 11 is avoided, and effective molding of the subsequent plastic reinforcing part 6 is ensured.

In one possible implementation, the plastic reinforcement 6 is an injection molded material component. Injection molding is a method for producing and shaping industrial products. Products are generally molded using rubber and plastic. In this embodiment, the injection molding material is easily formed in the lightening holes 11 and the corresponding holes 31, and the structural reinforcement effect on the core 1 is achieved.

In the present embodiment, referring to fig. 1 to 3, the outer diameter of the balance plate 3 is equal to the outer diameter of the core 1, and the outer diameter of the presser plate 4 is smaller than the outer diameter of the core 1. An adhesive layer 5 is formed between two adjacent sections of the iron cores 1 or between the iron cores 1 and the balance plate 3 by applying a fixing adhesive to the end surfaces of the iron cores 1. The end surface areas of the iron core 1 and the balance plate 3 are equal, and the iron core and the balance plate can be effectively aligned and attached. The application amount of the fixing glue is correspondingly set according to the end surface area and the required thickness of the adhesive layer 5, so that the thickness of the adhesive layer 5 between two adjacent sections of iron cores 1 and between the iron cores 1 and the balance plate 3 is consistent, the iron cores 1 can not rebound after being stacked, gaps among the sections of the iron cores 1 are avoided, and the rigidity of the rotor structure is improved.

The pressing plate 4 is used for axially limiting the balance plate 3, the radius of the pressing plate 4 can be smaller than the areas of the balance plate 3 and the iron core 1, the outer end face of the balance plate 3 is ensured to be in contact with the pressing plate 4, and the axial limiting of the pressing plate 4 to the balance plate 3 can be realized.

In one possible implementation, from the middle of the rotating shaft 2 to the end of the rotating shaft 2, a certain rotation deflection angle is formed between two adjacent sections of iron cores 1, and the lightening holes 11 of the two adjacent sections of iron cores 1 are at least partially communicated.

In this embodiment, based on the requirement that the magnetic steel 12 embedded in the iron core 1 is used, the two adjacent iron cores 1 need to be rotated by a certain angle, specifically, the rotation deflection angle is 2 ° -3 °, the angle between the magnetic steels 12 of the two adjacent iron cores 1 is ensured, and the normal use of the rotor structure is satisfied.

Meanwhile, due to the existence of the rotation deflection angle between the two sections of iron cores 1, the lightening holes 11 can generate angular dislocation in the circumferential direction of the iron cores 1, and then the adjacent two lightening holes 11 in the axial direction of the iron cores 1 generate position dislocation, at this time, the plastic reinforcing parts 6 poured into the lightening holes 11 and the corresponding holes 31 have a certain bending trend, the projection of the lightening holes 11 of the adjacent two sections of iron cores 1 is ensured to have a coincident part, namely, the injection molding material can be ensured to effectively flow in the adjacent lightening holes 11, and further the plastic reinforcing parts 6 are ensured to form reliable structural reinforcing effect on the multi-section iron cores 1, so that the structural noise and vibration are reduced.

In one possible implementation, the characteristic rotating shaft 2 may adopt a structure as shown in fig. 1 to 3. Referring to fig. 1 to 3, both ends of the rotating shaft 2 are respectively provided with shaft ends 21 for installing the pressing plate 4, the pressing plate 4 is in interference fit with the shaft ends 21 of the rotating shaft 2, and the inner end surface of the pressing plate 4 is respectively in contact fit with the outer end surface of the rotating shaft 2 and the outer end surface of the balance plate 3.

In this embodiment, the pressing plate 4 is sleeved on the outer periphery of the shaft end 21 of the rotating shaft 2, the inner peripheral wall of the pressing plate 4 is in interference fit with the outer peripheral wall of the shaft end 21, the axial position of the pressing plate 4 is locked after the pressing plate 4 is mounted on the shaft end 21, and meanwhile, the pressing plate 4 is respectively arranged on two shaft ends 21 of the rotating shaft 2 and can be pressed against the outer end face of the balance plate 3, so that the axial positions of the balance plate 3 and the iron core 1 are limited.

Specifically, after the pressing plate 4 is pressed onto the shaft end 21 through interference fit, pressure maintaining treatment is performed, and meanwhile, the rotor structure is heated, so that the fixing glue is solidified and formed into the adhesive layer 5 between the iron cores 1 or between the iron cores 1 and the balance plate 3.

The structure improves through less structure, has strengthened the overall rigidity of rotor structure, has shortened product development cycle greatly, has reduced rotor structure's cost, has reduced rotor result's vibration and noise 15dB.

Based on the same inventive concept, the embodiment of the utility model also provides a motor, wherein the motor comprises a motor rotor structure. According to the motor rotor structure of the motor, the adhesive layer 5 is arranged between the balance plate 3 and the iron core 1 and between the two adjacent sections of the iron cores 1, so that the problem of gaps between the balance plate 3 and the iron cores 1 and between the two adjacent sections of the iron cores 1 is avoided, the lamination quality of the rotor structure is improved, the structural rigidity of the rotor is increased, the noise and vibration problems of the rotor are fundamentally restrained, and the overall performance of the motor is improved.

Based on the same inventive concept, the embodiment of the utility model also provides a vehicle, wherein the vehicle comprises a motor. The motor of the vehicle has the characteristics of small noise, small vibration and the like, and the structural rigidity of the rotor is enhanced by improving the lamination quality of the inner rotor structure of the motor, so that the clicking and the stable running of the vehicle are ensured.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. The motor rotor structure is characterized by comprising a plurality of sections of iron cores (1) which are arranged in a stacked mode, a rotating shaft (2) penetrating through the center of each iron core (1), two balance plates (3) respectively sleeved at two ends of each rotating shaft (2) and two pressing plates (4) which are located on the outer sides of the corresponding balance plates (3) in a one-to-one correspondence mode, wherein each section of iron cores (1) is provided with an axially through magnetic steel (12) in a penetrating mode, and an adhesive layer (5) is arranged between each balance plate (3) and each iron core (1) and between every two adjacent sections of iron cores (1);

the iron core (1) is further provided with a lightening hole (11) located at the inner side of the magnetic steel (12) in a penetrating mode, the balance plate (3) is provided with a corresponding hole (31) correspondingly communicated with the lightening hole (11), and the corresponding hole (31) and the lightening hole (11) are internally provided with a plastic reinforcing part (6) extending along the axial direction of the rotating shaft (2).

2. A motor rotor structure according to claim 1, characterized in that the adhesive layer (5) is arranged close to the outer ring of the core (1), the area of the adhesive layer (5) being larger than 1/2 of the area of the end face of the core (1).

3. A motor rotor structure according to claim 2, characterized in that the lightening holes (11) are arranged in a plurality at intervals along the circumferential direction of the core (1), and the intervals between two adjacent lightening holes (11) are equal.

4. A rotor structure of an electric machine according to claim 3, characterized in that the lightening holes (11) are triangular, and that the corner points of the lightening holes (11) are provided with arc transitions.

5. A motor rotor structure according to claim 2, characterized in that the plastic reinforcement (6) is an injection-molded material member.

6. A motor rotor structure according to any one of claims 1-5, characterized in that the outer diameter of the balancing plate (3) is equal to the outer diameter of the core (1), and the outer diameter of the pressing plate (4) is smaller than the outer diameter of the core (1).

7. A rotor structure for an electric machine according to any one of claims 1-5, characterized in that from the middle of the shaft (2) to the ends of the shaft (2), there is a rotation deflection angle between two adjacent segments of the cores (1), and the weight-reducing holes (11) of two adjacent segments of the cores (1) are at least partially through.

8. The motor rotor structure according to any one of claims 1 to 5, characterized in that both ends of the rotating shaft (2) are respectively provided with shaft ends (21) for mounting the pressing plate (4), the pressing plate (4) is in interference fit with the shaft ends (21) of the rotating shaft (2), and an inner end surface of the pressing plate (4) is respectively in contact fit with an outer end surface of the rotating shaft (2) and an outer end surface of the balance plate (3).

9. An electric machine, characterized in that it comprises an electric machine rotor structure according to any one of claims 1-8.

10. A vehicle, characterized in that it comprises an electric machine according to claim 9.