Rotor punching sheet, rotor iron core, rotor, motor and vehicle

Abstract

The utility model relates to a rotor punching sheet, a rotor core, a rotor, a motor and a vehicle, the rotor punching sheet comprises a first punching sheet part and a second punching sheet part located at the radial inner side of the first punching sheet part, and the second punching sheet part and the first punching sheet part are elastically connected, so that various impacts and vibrations can be effectively absorbed and buffered; and radial deformation of the shaft hole of the rotor punching sheet under high-speed rotation is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a rotor lamination, a rotor core, a rotor, a motor and a vehicle. BACKGROUND

[0002] At high rotation speed, centrifugal force and electromagnetic force can cause the shaft hole of the rotor lamination to be radially deformed, which affects the performance of the motor.

[0003] In combination with the characteristics of the related art, it is found that the rotor lamination of the prior art has the technical problem of radial deformation of the shaft hole. CONTENT OF THE INVENTION

[0004] The rotor lamination, the rotor core, the rotor, the motor and the vehicle provided by the embodiments of the present application elastically connect the second lamination part to the first lamination part of the rotor lamination, so as to at least partially solve the above technical problem.

[0005] In order to achieve the above-mentioned purpose, according to a first aspect of the present application, a rotor lamination is provided, comprising:

[0006] a first lamination part; and

[0007] a second lamination part, which is located on the radially inner side of the first lamination part;

[0008] wherein the second lamination part is elastically connected to the first lamination part.

[0009] Optionally, the rotor lamination further comprises an elastic member, which is connected between the first lamination part and the second lamination part.

[0010] Optionally, the elastic member comprises at least one elastic part, the elastic part comprising a first connecting part and a second connecting part, the first connecting part being connected to the second lamination part, and the second connecting part being connected to the first lamination part.

[0011] Optionally, the first connecting part and the second connecting part are arranged in a staggered manner in the radial direction of the rotor lamination.

[0012] Optionally, at least one of the first connecting part and the second connecting part extends in the radial direction of the rotor lamination.

[0013] Optionally, the elastic part comprises one first connecting part and one second connecting part, and / or the elastic part comprises at least two first connecting parts and one second connecting part, and / or the elastic part comprises one first connecting part and at least two second connecting parts, and / or the elastic part comprises at least two first connecting parts and at least two second connecting parts.

[0014] Optionally, the elastic part further comprises a third connecting part connected between the first connecting part and the second connecting part.

[0015] Optionally, a ratio of a radial thickness of the third connecting part to a length of the third connecting part along a circumferential direction of the rotor lamination ranges from 0.03 to 0.3.

[0016] Optionally, an extension direction of the third connecting part is different from an extension direction of at least one of the first connecting part and the second connecting part.

[0017] Optionally, an extension direction of the third connecting part forms an included angle with a radial direction of the rotor lamination.

[0018] Optionally, a length of the elastic part is greater than a distance between the first lamination part and the second lamination part along a radial direction of the rotor lamination.

[0019] Optionally, the elastic part comprises a plurality of elastic parts, and the plurality of elastic parts are uniformly distributed or non-uniformly distributed along a circumferential direction of the rotor lamination.

[0020] Optionally, at least one of the first lamination part and the second lamination part is integrally formed with the elastic part.

[0021] Optionally, the second lamination part is any one of a silicon steel structure, a soft magnetic composite structure, and an amorphous alloy structure; and / or the first lamination part is any one of a silicon steel structure, a soft magnetic composite structure, and an amorphous alloy structure; and / or the elastic part is any one of a silicon steel structure, a soft magnetic composite structure, and an amorphous alloy structure.

[0022] Optionally, a radial inner side of the second lamination part is provided with a shaft hole suitable for the shaft to pass through.

[0023] Optionally, the first lamination part is provided with a permanent magnet mounting groove set for mounting a permanent magnet.

[0024] Optionally, the permanent magnet mounting groove set comprises a first permanent magnet mounting groove and a second permanent magnet mounting groove, and the first permanent magnet mounting groove is located on a side of the second permanent magnet mounting groove close to the second lamination part.

[0025] Optionally, an arrangement shape of the permanent magnet mounting groove set is one or more of a linear shape, an arc shape, a V-shaped, a U-shaped, and a W-shaped.

[0026] Optionally, the first lamination part and / or the second lamination part is provided with a weight-reducing hole and / or a mounting hole.

[0027] According to a third aspect of the present application, a rotor core is also provided, comprising the rotor sheet as in any of the above embodiments.

[0028] Optionally, the rotor sheet is arranged in a segmented skewed pole or a continuous skewed pole.

[0029] According to a third aspect of the present application, a rotor is also provided, comprising the rotor sheet as in any of the above embodiments, or the rotor core as in any of the above embodiments.

[0030] Optionally, the rotor further comprises a rotating shaft, the second sheet part of the rotor sheet is provided with a fixing part, and the rotating shaft is provided with a cooperating part, the fixing part and the cooperating part being mutually cooperative.

[0031] According to a fourth aspect of the present application, an electric machine is also provided, comprising the rotor sheet as in any of the above embodiments, or the rotor core as in any of the above embodiments, or the rotor as in any of the above embodiments.

[0032] According to a fifth aspect of the present application, a vehicle is also provided, comprising the rotor sheet as in any of the above embodiments, or the rotor core as in any of the above embodiments, or the rotor as in any of the above embodiments, or the electric machine as in the above embodiments.

[0033] In the rotor sheet of the embodiments of the present application, the rotor sheet is divided into a first sheet part and a second sheet part located radially inward of the first sheet part, and the second sheet part and the first sheet part are elastically connected, which can effectively absorb and buffer various impacts and vibrations, and avoid radial deformation of the shaft hole of the rotor sheet at high speed.

[0034] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0036] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0037] Figure 1 is a structural schematic diagram of a steering system provided in an exemplary embodiment of the present disclosure;

[0038] Figure 2 is a structural schematic diagram of an inner knuckle in a rotor lamination provided in an exemplary embodiment of the present disclosure;

[0039] Figure 3 is a first structural schematic diagram of an outer knuckle in a rotor lamination provided in an exemplary embodiment of the present disclosure.

[0040] Explanation of Reference Signs:

[0041] 10, rotor lamination; 1, first lamination part; 2, second lamination part;

[0042] 3, elastic member; 31, elastic part; 301, first connecting part; 302, second connecting part; 303, third connecting part;

[0043] 4, permanent magnet mounting groove set; 5, mounting hole; 6, shaft hole; 7, first permanent magnet mounting groove; 8, second permanent magnet mounting groove. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0045] According to the first aspect of the present application, referring to Figure 1 and Figure 2 the rotor lamination 10 provided by the present disclosure includes a first lamination part 1 and a second lamination part 2, the second lamination part 2 is located on the radially inner side of the first lamination part 1; the second lamination part 2 and the first lamination part 1 are elastically connected.

[0046] In the present embodiment, the rotor lamination 10 is divided into a first lamination part 1 and a second lamination part 2 located on the radially inner side of the first lamination part 1, and the second lamination part 2 and the first lamination part 1 are elastically connected, which can effectively absorb and buffer various impacts and vibrations, avoid radial deformation of the shaft hole 6 of the rotor lamination under high-speed rotation, and alleviate the technical problem of radial deformation of the shaft hole 6 of the rotor lamination 10.

[0047] In an embodiment, the rotor lamination 10 further includes an elastic member 3, and the elastic member 3 is connected between the first lamination part 1 and the second lamination part 2.

[0048] It can be understood that the second punching part 2 is used for the cooperation of the rotor punching sheet 10 and the rotating shaft. When the rotor punching sheet 10 rotates at a high speed, the influence of the centrifugal force and the electromagnetic force on the second punching part 2 is buffered by the elastic member 3, so that the second punching part 2 does not separate from the rotating shaft to generate a gap, so that the rotor punching sheet 10 can be in interference fit with the rotating shaft and rotate normally at a high speed.

[0049] In an embodiment, the elastic member 3 has a first state and a second state. In the first state, the elastic member 3 is in a natural state. In the second state, the elastic member 3 is in a deformed state.

[0050] In an embodiment, referring to Figure 2 , the elastic member 3 includes at least one elastic part 31, and the elastic part 31 includes a first connecting part 301 and a second connecting part 302. The first connecting part 301 is connected with the second punching part 2, and the second connecting part 302 is connected with the first punching part 1.

[0051] In an embodiment, the number of elastic parts 31 can be multiple.

[0052] In an embodiment, the number of elastic parts 31 can be two, four, or eight.

[0053] In an embodiment, the two elastic parts 31 are oppositely arranged on opposite sides of the second punching part 2, and the two elastic parts 31 are symmetrically arranged.

[0054] In an embodiment, the elastic part 31 can be four or eight, and the four or eight elastic parts 31 are centrally symmetrically arranged about the center of the second punching part 2.

[0055] It can be understood that the two or four or eight elastic parts 31 are centrally symmetrically arranged, which can improve the stability of the connection of the elastic member 3 and better buffer the centrifugal force and the electromagnetic force.

[0056] In an embodiment, referring to Figure 2 , when the elastic part 31 is in a natural state, the first connecting part 301 and the second connecting part 302 are arranged in a radial direction of the rotor punching sheet 10.

[0057] It can be understood that the first connecting part 301 and the second connecting part 302 are arranged in a radial direction of the rotor punching sheet 10, so that the length of the elastic part 31 is greater, thereby having greater buffering capacity under the action of the centrifugal force and the electromagnetic force, so as to reduce the influence of the centrifugal force and the electromagnetic force on the second punching part 2.

[0058] It should be noted that the first punch part 1 is farther away from the circle than the second punch part 2, so that the centrifugal force and electromagnetic force of the first punch part 1 are larger, and the influence of the centrifugal force and electromagnetic force on the first punch part 1 is affected to the second punch part 2 through the elastic member 3, by enabling the elastic member 3 to better buffer the centrifugal force and electromagnetic force, avoiding the second punch part 2 from being deformed greatly under the action of the centrifugal force and electromagnetic force at high speed, and causing the second punch part 2 to be separated from the rotating shaft.

[0059] In an embodiment, referring to Figure 2 , at least one of the first connecting part 301 and the second connecting part 302 extends along the radial direction of the rotor punch 10.

[0060] Wherein, the natural state of the elastic part 31 refers to the state that the elastic part 31 does not deform.

[0061] It can be understood that by connecting the elastic part 31 between the first punch part 1 and the second punch part 2, at least one of the first connecting part 301 and the second connecting part 302 of the elastic part 31 extends along the radial direction of the rotor punch 10, preventing the radial deformation of the shaft hole 6 on the second punch part 2 under the high-speed rotation of the rotor punch 10, and avoiding the separation of the rotor punch 10 from the rotating shaft.

[0062] In an embodiment, the ratio of the thickness of the elastic part 31 to the length of the elastic part 31 along the circumferential direction of the rotor punch 10 ranges from 0.03 to 0.3.

[0063] Wherein, the ratio of the thickness of the elastic part 31 to the length of the elastic part 31 along the circumferential direction of the rotor punch 10 can be any one of 0.03, 0.1, 0.2, and 0.3.

[0064] It can be understood that when the ratio is less than 0.03, the stiffness of the elastic part 31 is not enough, which does not meet the structural strength requirement; when the ratio is greater than 0.3, the stiffness of the elastic part 31 is relatively large, which does not play the role of elastic compensation, resulting in structural failure.

[0065] In an embodiment, the elastic part 31 includes one first connecting part 301 and one second connecting part 302, and / or the elastic part 31 includes at least two first connecting parts 301 and one second connecting part 302, and / or the elastic part 31 includes one first connecting part 301 and at least two second connecting parts 302, and / or the elastic part 31 includes at least two first connecting parts 301 and at least two second connecting parts 302.

[0066] It can be understood that the number of the first connecting portions 301 and the number of the second connecting portions 302 of the elastic portion 31 can be independently selected from positive integers. N first connecting portions 301 and M second connecting portions 302 are matched in any number, N and M are integers, N first connecting portions 301 are respectively connected to the second punching portion 2, M second connecting portions 302 are respectively connected to the first punching portion 1, the number of the first connecting portions 301 and the number of the second connecting portions 302 of the elastic portion 31 can be the same, that is, N=M; and / or, the number of the first connecting portions 301 and the number of the second connecting portions 302 of the elastic portion 31 can also be different, such as N>M, or N<M.

[0067] In an embodiment, the extension direction of the third connecting portion 303 is different from the extension direction of at least one of the first connecting portion 301 and the second connecting portion 302.

[0068] The extension direction of the third connecting portion 303 refers to the direction of the line connecting the two ends of the third connecting portion 303 connected to the first connecting portion 301 and the second connecting portion 302, respectively.

[0069] The extension direction of the first connecting portion 301 refers to the direction of the line connecting the two ends of the first connecting portion 301 connected to the second punching portion 2 and the third connecting portion 303, respectively.

[0070] The extension direction of the second connecting portion 302 refers to the direction of the line connecting the two ends of the second connecting portion 302 connected to the first punching portion 1 and the third connecting portion 303, respectively.

[0071] In an embodiment, referring to Figure 2 , the elastic portion 31 further comprises a third connecting portion 303 connected between the first connecting portion 301 and the second connecting portion 302.

[0072] It can be understood that by dividing the elastic portion 31 into the first connecting portion 301, the second connecting portion 302, and the third connecting portion 303, the elastic portion 31 can better avoid the rotor punching sheet 10 from being separated from the shaft.

[0073] In an embodiment, when the elastic portion 31 is in a natural state, the extension direction of the third connecting portion 303 is different from the extension direction of at least one of the first connecting portion 301 and the second connecting portion 302.

[0074] It can be understood that the extension direction of the third connecting portion 303 is different from the extension direction of at least one of the first connecting portion 301 and the second connecting portion 302, so that the length of the elastic portion 31 in the radial direction is longer, thereby having a better buffering effect on the centrifugal force and the electromagnetic force.

[0075] In an embodiment, please refer to Figure 2 When the elastic part 31 is in a natural state, the extension direction of the third connecting part 303 and the radial direction of the rotor lamination 10 form an included angle.

[0076] It can be understood that the third connecting part 303 is not along the radial direction, and the third connecting part 303 has a greater stretching length along the radial direction during the stretching of the elastic part 31 along the radial direction, thereby further relieving the influence of the centrifugal force and the electromagnetic force on the second lamination part 2.

[0077] In an embodiment, please refer to Figure 3 The elastic member 3 comprises a plurality of elastic parts 31, and the elastic part 31 is connected between the first lamination part 1 and the second lamination part 2.

[0078] It can be understood that at least one of the structure, shape, connection relationship, and size of the plurality of elastic parts 31 is not the same, so that the elastic member 3 has diversity in absorbing and buffering the centrifugal force and the electromagnetic force, and the elastic member 3 can be designed in a targeted manner, thereby better avoiding the rotor lamination 10 from being separated from the shaft.

[0079] In an embodiment, please refer to Figure 3 Each elastic part 31 is connected to one of the first lamination part 1 and the second lamination part 2 through a first connecting point, and is connected to the other of the first lamination part 1 and the second lamination part 2 through a plurality of second connecting points.

[0080] It can be understood that by being connected to the second lamination part 2 through a plurality of second connecting points, the elastic part 31 can be prevented from being broken or separated from the second lamination part 2.

[0081] In an embodiment, please refer to Figure 3 Each elastic part 31 is connected to one of the first lamination part 1 and the second lamination part 2 through a plurality of third connecting points, and is connected to the other of the first lamination part 1 and the second lamination part 2 through a plurality of fourth connecting points.

[0082] It can be understood that by being connected to one of the first lamination part 1 and the second lamination part 2 through a plurality of third connecting points, and being connected to the other of the first lamination part 1 and the second lamination part 2 through a plurality of fourth connecting points, the elastic part 31 can be prevented from being broken or separated from the first lamination part 1 and the second lamination part 2.

[0083] In an embodiment, please refer to Figure 3 The plurality of elastic parts 31 are arranged in sequence and spaced apart in the circumferential direction of the second lamination part 2.

[0084] The plurality of elastic portions 31 can be arranged periodically.

[0085] It can be understood that the plurality of elastic portions 31 are arranged in sequence in the circumferential direction of the second punching portion 2, so that the buffering effects of centrifugal force and electromagnetic force on different sides of the second punching portion 2 tend to be the same, thereby avoiding disengagement of the rotating shaft from the second punching portion 2.

[0086] In an embodiment, referring to Figure 3 The plurality of elastic portions 31 have different structures, and the elastic portion 31 includes one first connecting portion 301 and two second connecting portions 302, and two first connecting portions 301 and two second connecting portions 302.

[0087] It can be understood that the plurality of elastic portions 31 have different structures, thereby increasing the diversity of the elastic member 3 arranged between the second punching portion 2 and the first punching portion 1.

[0088] In an embodiment, referring to Figure 3 The elastic member 3 is integrally formed with the first punching portion 1 and the second punching portion 2.

[0089] The elastic member 3, the first punching portion 1, and the second punching portion 2 can be prepared by forming shaft holes 6 on the rotor punching sheet 10, the shaft holes 6 are located between the first punching portion 1 and the second punching portion 2, and the elastic portions 31 are formed between adjacent shaft holes 6.

[0090] It can be understood that the elastic member 3 is integrally formed with the first punching portion 1 and the second punching portion 2, thereby simplifying the forming process of the elastic member 3 and reducing the cost.

[0091] In an embodiment, the elastic member 3 includes at least one elastic portion 31, each elastic portion 31 is connected between the first punching portion 1 and the second punching portion 2, and the length of the elastic portion 31 in the first state is greater than the distance between the first punching portion 1 and the second punching portion 2.

[0092] It can be understood that the length of the elastic portion 31 in the undeformed state is greater than the distance between the first punching portion 1 and the second punching portion 2, so that the elastic portion 31 can better buffer the centrifugal force and electromagnetic force transmitted from the first punching portion 1 to the second punching portion 2, thereby avoiding large radial deformation of the second punching portion 2.

[0093] In an embodiment, the elastic member 3 includes a plurality of elastic portions 31, and the plurality of elastic portions 31 are uniformly distributed or non-uniformly distributed in the circumferential direction of the second punching portion 2.

[0094] It can be understood that the elastic part 31 is uniformly distributed in the circumferential direction of the second punching part 2, which is beneficial to enhance the buffering effect of the elastic part 3 on different areas of the second punching part 2; the elastic part 31 is not uniformly distributed in the circumferential direction of the second punching part 2, which is beneficial to improve the design diversity of the elastic part 3.

[0095] In an embodiment, referring to Figure 3 , the second punching part 2 is provided with an axle hole 6, which is suitable for the axle to pass through.

[0096] Among them, the axle hole 6 of the second punching part 2 cooperates with the shaft, so that the rotor punching sheet 10 is in interference fit with the shaft.

[0097] It can be understood that the second punching part 2 is provided with an axle hole 6, which is used to enable the rotor punching sheet 10 to cooperate with the shaft to rotate around the shaft.

[0098] In an embodiment, the first punching part 1 is provided with a permanent magnet mounting groove group 4, which is used to install a permanent magnet.

[0099] In an embodiment, the first punching part 1 and / or the second punching part 2 is provided with a weight-reducing hole and / or a mounting hole 5. The weight-reducing hole provided on the first punching part 1 and / or the second punching part 2 can reduce the weight of the rotor punching sheet 10, realizing the lightweight of the rotor; the mounting hole 5 provided on the first punching part 1 and / or the second punching part 2 can facilitate the installation of the first punching part 1 and / or the second punching part 2.

[0100] Referring to Figures 1-3 , in an embodiment, the area of the first punching part 1 can be larger than the area of the second punching part 2. The weight-reducing hole designed on the first punching part 1 with a larger area can set a larger weight-reducing hole, further reducing the weight of the rotor punching sheet 10.

[0101] In an embodiment, the shapes of adjacent elastic parts 31 are the same, and the adjacent elastic parts 31 are periodically arranged in the circumferential direction of the rotor punching sheet 10.

[0102] It can be understood that by making the shapes of the elastic parts 31 the same and periodically arranged, the buffering effect of the centrifugal force and the electromagnetic force in each direction of the second punching part 2 can be the same, thereby improving the uniformity of the deformation of the second punching part 2 and avoiding abnormal deformation of one or more areas to a large extent.

[0103] In an embodiment, the overall shape of the elastic part 31 is composed of at least one subpart with a regular shape.

[0104] Among them, the shape of the subpart includes any one of triangle, circle, rectangle, trapezoid, square, diamond, and arc.

[0105] It can be understood that the elastic part 31 is formed by at least one sub part with a regular shape, so that the buffering effect of the elastic part 31 on centrifugal force and electromagnetic force is more diversified, and the elastic part 31 is stretched and elastically deformed to absorb impact and vibration during relative rotation of the rotor lamination 10 and the rotating shaft.

[0106] In an embodiment, the first lamination part 1 is provided with a permanent magnet mounting groove group 4 for mounting a permanent magnet.

[0107] In an embodiment, the permanent magnet mounting groove group 4 includes a first permanent magnet mounting groove 7 and a second permanent magnet mounting groove 8, and the first permanent magnet mounting groove 7 is located on the side of the second permanent magnet mounting groove 8 close to the second lamination part 2.

[0108] In an embodiment, the arrangement shape of the permanent magnet mounting groove group 4 is one or more of a linear shape, an arc shape, a V shape, a U shape, and a W shape.

[0109] The rotor lamination 10 provided by the utility model includes a second lamination part 2, a first lamination part 1 and an elastic part 3 connected between the first lamination part 1 and the second lamination part 2, the elastic part 3 can absorb and buffer centrifugal force and electromagnetic force, under high-speed rotation, the problem of radial deformation of the shaft hole 6 of the second lamination part 2 of the rotor lamination 10 caused by centrifugal force and electromagnetic force is avoided, and then the slip of the matching surface of the rotating shaft and the shaft hole 6 of the rotor lamination 10 caused by the radial deformation is avoided, and the eccentric separation of the rotating shaft and the rotor lamination 10 is avoided.

[0110] According to the second aspect of the application, a rotor core is also provided, which includes the rotor lamination 10 according to any one of the above embodiments, and a plurality of the rotor laminations 10 are stacked.

[0111] In an embodiment, the rotor lamination 10 is stacked in a segmented skew pole or continuous skew pole manner.

[0112] According to the third aspect of the application, a rotor is also provided, which includes the rotor lamination 10 according to any one of the above embodiments, or the rotor core according to any one of the above embodiments.

[0113] In an embodiment, the rotor further includes a rotating shaft, the second lamination part 2 of the rotor lamination 10 is provided with a fixing part, the rotating shaft is provided with a matching part, and the fixing part and the matching part are matched with each other.

[0114] The fixing part and the matching part can be matched with each other through a bolt fixing mode or a riveting mode.

[0115] It can be understood that the fixed part and the matching part can be matched through the key groove, one of the fixed part and the matching part is a protruding structure, and the other is a groove structure, and the fixed part and the matching part are clamped with each other to realize the limiting of the rotating shaft and the rotor lamination 10 in the circumferential direction.

[0116] According to a fourth aspect of the present disclosure, there is provided an electric machine comprising the rotor lamination according to any one of the above embodiments, or the rotor core according to any one of the above embodiments, or the rotor according to any one of the above embodiments.

[0117] According to a fifth aspect of the present disclosure, there is provided a vehicle comprising the rotor lamination according to any one of the above embodiments, or the rotor core according to any one of the above embodiments, or the rotor according to any one of the above embodiments, or the electric machine according to any one of the above embodiments, which has all the beneficial effects of the rotor lamination or the rotor core or the rotor or the electric machine according to any one of the above embodiments, which will not be repeated here.

[0118] The vehicle can be a fuel vehicle, a plug-in hybrid vehicle, or a new energy vehicle, etc., which is not specifically limited by the present disclosure.

[0119] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0120] In the above embodiments, the description of each embodiment is focused on, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0121] The embodiments, implementation manners and related technical features of the present application can be combined, replaced with each other without conflict.

[0122] The above is only the preferred embodiment of the present application, and does not limit the present application in any form, but any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the present application, which does not deviate from the technical solution content of the present application, still belongs to the scope of the technical solution of the present application.

Claims

1. A rotor lamination (10), characterized in that, include: First film processing section (1); as well as The second stamping part (2) is located radially inside the first stamping part (1); The second stamping part (2) is elastically connected to the first stamping part (1).

2. The rotor lamination (10) according to claim 1, characterized in that, The rotor lamination (10) also includes an elastic element (3), which is connected between the first lamination portion (1) and the second lamination portion (2).

3. The rotor lamination (10) according to claim 2, characterized in that, The elastic element (3) includes at least one elastic part (31), the elastic part (31) includes a first connecting part (301) and a second connecting part (302), the first connecting part (301) is connected to the second stamping part (2), and the second connecting part (302) is connected to the first stamping part (1).

4. The rotor lamination (10) according to claim 3, characterized in that, The first connecting part (301) and the second connecting part (302) are offset from each other in the radial direction of the rotor lamination (10).

5. The rotor lamination (10) according to claim 3, characterized in that, At least one of the first connecting portion (301) and the second connecting portion (302) extends radially along the rotor lamination (10).

6. The rotor lamination (10) according to claim 3, characterized in that, The elastic part (31) includes a first connecting part (301) and a second connecting part (302), and / or, the elastic part (31) includes at least two first connecting parts (301) and a second connecting part (302), and / or, the elastic part (31) includes a first connecting part (301) and at least two second connecting parts (302), and / or, the elastic part (31) includes at least two first connecting parts (301) and at least two second connecting parts (302).

7. The rotor lamination (10) according to claim 6, characterized in that, The elastic part (31) further includes a third connecting part (303), which is connected between the first connecting part (301) and the second connecting part (302).

8. The rotor lamination (10) according to claim 7, characterized in that, The ratio of the thickness of the third connecting portion (303) along the radial direction of the rotor lamination (10) to the length of the third connecting portion (303) along the circumferential direction of the rotor lamination (10) is in the range of 0.03 to 0.

3.

9. The rotor lamination (10) according to claim 8, characterized in that, The extension direction of the third connecting portion (303) is different from the extension direction of at least one of the first connecting portion (301) and the second connecting portion (302).

10. The rotor lamination (10) according to claim 8, characterized in that, The extension direction of the third connecting part (303) forms an angle with the radial direction of the rotor lamination (10).

11. The rotor lamination (10) according to any one of claims 3-10, characterized in that, The length of the elastic part (31) is greater than the distance between the first lamination part (1) and the second lamination part (2) in the radial direction of the rotor lamination (10).

12. The rotor lamination (10) according to any one of claims 2-10, characterized in that, The elastic element (3) includes a plurality of elastic parts (31), which are evenly or unevenly distributed in the circumferential direction of the rotor lamination (10).

13. The rotor lamination (10) according to any one of claims 2-10, characterized in that, At least one of the first stamped portion (1) and the second stamped portion (2) is integrally formed with the elastic member (3).

14. The rotor lamination (10) according to claim 2, characterized in that, The second stamping part (2) is any one of silicon steel structure, soft magnetic composite structure, and amorphous alloy structure; and / or, the first stamping part (1) is any one of silicon steel structure, soft magnetic composite structure, and amorphous alloy structure; and / or, the elastic element (3) is any one of silicon steel structure, soft magnetic composite structure, and amorphous alloy structure.

15. The rotor lamination (10) according to claim 1, characterized in that, The second punch portion (2) has a shaft hole (6) on its radial inner side, which is adapted for the shaft to pass through.

16. The rotor lamination (10) according to claim 1, characterized in that, The first stamping section (1) is provided with a permanent magnet mounting groove group (4), which is used to install permanent magnets.

17. The rotor lamination (10) according to claim 16, characterized in that, The permanent magnet mounting slot group (4) includes a first permanent magnet mounting slot (7) and a second permanent magnet mounting slot (8), wherein the first permanent magnet mounting slot (7) is located on the side of the second permanent magnet mounting slot (8) near the second punch portion (2).

18. The rotor lamination (10) according to claim 16, characterized in that, The permanent magnet mounting slot group (4) is arranged in one or more of the following shapes: straight, arc, V, U, and W.

19. The rotor lamination (10) according to claim 1, characterized in that, The first stamping part (1) and / or the second stamping part (2) are provided with weight reduction holes and / or mounting holes (5).

20. A rotor core, characterized in that, The rotor laminations (10) as described in any one of claims 1 to 19 are stacked together.

21. The rotor core according to claim 20, characterized in that, The rotor laminations (10) are stacked in a segmented skewed or continuous skewed manner.

22. A rotor, characterized in that, It includes the rotor lamination (10) as described in any one of claims 1 to 19, or the rotor core as described in any one of claims 20 to 21.

23. The rotor according to claim 22, characterized in that, The rotor also includes a rotating shaft. The second lamination part (2) of the rotor lamination (10) is provided with a fixing part. The rotating shaft is provided with a mating part. The fixing part and the mating part cooperate with each other.

24. An electric motor, characterized in that, It includes the rotor lamination (10) as described in any one of claims 1 to 19, or the rotor core as described in any one of claims 20 to 21, or the rotor as described in any one of claims 22 to 23.

25. A vehicle, characterized in that, It includes the rotor lamination (10) as described in any one of claims 1 to 19, or the rotor core as described in any one of claims 20 to 21, or the rotor as described in any one of claims 22 to 23, or the motor as described in claim 24.

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