Rotor assembly, motor and vehicle

Abstract

The utility model relates to a rotor assembly, a motor and a vehicle, the rotor assembly comprises magnetic bodies and a rotor core, a plurality of assembling grooves distributed along the circumferential direction of the rotor assembly are formed in the rotor core, the magnetic bodies are at least partially accommodated in the assembling grooves, the installation of the magnetic bodies and the rotor core is completed, and the rotor core comprises a body. A shaft hole is formed in the body, an elastic body is formed or contained on the rotor iron core, the elastic body is provided with an abutting part which at least partially intrudes into the assembling groove when the elastic body is in a natural state, and the abutting part is arranged between the body and the magnetic body in the radial direction of the rotor assembly, so that the elastic body at least biases the magnetic body in the radial direction of the rotor iron core. According to the technical scheme, the elastic body can apply bias pressure to the magnetic body, stable installation of the magnetic body and the rotor core is realized, the use stability of the rotor assembly is improved, and the motor performance is ensured.

Description

Technical Field

[0001] The present application relates to the field of electronic technologies, and in particular, to a rotor assembly, an electric motor, and a vehicle. Background Art

[0002] At present, the magnetic bodies of a permanent magnet direct current brushless rotor assembly are generally fixed to a rotor core by an adhesive. During the use of such a rotor, the magnetic tiles may fall off due to factors such as adhesive aging or heat generated during the operation of the electric motor. Especially for high-speed electric motors, it is easier for the magnetic bodies to fall off from the rotor core.

[0003] To prevent the structural adhesive from failing and the magnetic bodies from falling off due to the action of centrifugal force, a protective sleeve made of stainless steel is usually added outside the magnetic bodies. However, the protective sleeve will occupy the air gap between the stator and the rotor, resulting in a loss of the performance of the electric motor. Summary of the Utility Model

[0004] Embodiments of the present application provide a rotor assembly, an electric motor, and a vehicle, which improve the use stability of the rotor assembly to at least partially solve the above technical problems.

[0005] To achieve the above object, according to the first aspect of the present application, a rotor assembly is provided, including:

[0006] A rotor core, formed with a plurality of assembly grooves distributed circumferentially along the rotor assembly, the rotor core including:

[0007] A body;

[0008] Magnetic bodies, at least partially received in the assembly grooves;

[0009] The rotor core forms or houses:

[0010] An elastomer, having an abutting portion that at least partially intrudes into the assembly groove when the elastomer is in a natural state;

[0011] Wherein, in the radial direction of the rotor assembly, the abutting portion is disposed between the body and the magnetic bodies, so that the elastomer biases the magnetic bodies at least in the radial direction of the rotor core.

[0012] Optionally, the magnetic bodies have an outer surface and an inner surface;

[0013] Wherein, the outer surface and the inner surface are oppositely disposed in the radial direction; the outer surface is disposed outside the assembly groove; the inner surface is disposed inside the assembly groove; and the abutting portion is disposed between the body and the inner surface.

[0014] Optionally, the outer surface is arc-shaped.

[0015] Optionally, the built-in surface is flat.

[0016] Optionally, the built-in surface is parallel to the axial direction of the rotor assembly and the generatrix direction of the outer surface.

[0017] Optionally, the rotor core has a plurality of inner surfaces of the slots forming the bottoms of the assembly slots; the rotor core forms an elastic body groove for accommodating at least a part of the elastic body at the inner surface of the slot.

[0018] Optionally, the rotor core further includes:

[0019] A plurality of outer retaining bridges, having wall surfaces of the slot walls forming the assembly slots;

[0020] Wherein, in the radial direction of the rotor assembly, the outermost edge of the outer retaining bridge is located inside the outermost edge of the magnetic body.

[0021] Optionally, the outer retaining bridge further has an avoidance surface that is at least recessed inward along the radial direction of the rotor assembly;

[0022] Wherein, the avoidance surface is connected between two wall surfaces of the slot.

[0023] Optionally, a plurality of the elastic bodies and / or the abutting portions are arranged in the axial direction of the rotor assembly.

[0024] Optionally, the elastic body has a plurality of the abutting portions.

[0025] Optionally, the elastic body is configured as a columnar structure having a plurality of bending structures.

[0026] Optionally, the abutting portion includes an inner bending structure that bends inward along the radial direction of the rotor assembly or an outer bending structure that bends outward; the inner bending structure and the outer bending structure are arranged at different positions in the axial direction of the rotor assembly.

[0027] Optionally, the rotor assembly further includes:

[0028] A connecting body, respectively connected to two of the elastic bodies located at different circumferential positions of the rotor assembly;

[0029] Wherein, the connecting body has at least a spanning portion extending in a direction that intersects obliquely with the radial direction of the rotor assembly.

[0030] Optionally, the rotor assembly further includes:

[0031] The elastic body and the connecting body are integrally formed.

[0032] Optionally, the body and the elastic body are integrally formed.

[0033] According to a second aspect of the present application, there is provided an electric motor, which includes the above-mentioned rotor assembly.

[0034] According to a third aspect of the present application, there is also provided a vehicle, including the above-mentioned vehicle.

[0035] In the rotor assembly of the embodiments of the present application, by forming a plurality of assembly grooves distributed along the circumferential direction of the rotor assembly on the rotor core, at least part of the magnetic body is accommodated in the assembly grooves to complete the installation of the magnetic body and the rotor core. At the same time, the rotor core includes a body, and an elastic body is formed or accommodated on the rotor core. The elastic body has an abutting portion that at least partially intrudes into the assembly groove when the elastic body is in a natural state. In the radial direction of the rotor assembly, the abutting portion is arranged between the body and the magnetic body, so that the elastic body biases the magnetic body at least in the radial direction of the rotor core, and further enables the elastic body to apply a biasing force to the magnetic body, realizing the stable installation of the magnetic body and the rotor core, improving the use stability of the rotor assembly, and ensuring the performance of the electric motor.

[0036] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0038] In order to more fully understand the present application and its beneficial effects, the following description will be made in conjunction with the drawings, where the same reference numerals represent the same parts in the following description.

[0039] Figure 1 is an exploded structural view of the stator assembly and the rotor assembly of the electric motor provided in the exemplary embodiment of the present disclosure;

[0040] Figure 2 is a top view of the connection structure of the stator assembly and the rotor assembly of the electric motor provided in the exemplary embodiment of the present disclosure;

[0041] Figure 3 is a side view of the elastic body, the magnetic body and the rotor core of the electric motor provided in the exemplary embodiment of the present disclosure;

[0042] Figure 4 is a top view of the elastic body, the magnetic body and the rotor core of the electric motor provided in the exemplary embodiment of the present disclosure;

[0043] Figure 5It is a schematic explosion structure diagram of an elastomer, a magnetic body and a rotor core provided in an exemplary embodiment of the present disclosure;

[0044] Figure 6 It is another schematic overall structure diagram of an elastomer, a magnetic body and a rotor core provided in an exemplary embodiment of the present disclosure;

[0045] Figure 7 It is Figure 6 a side view of;

[0046] Figure 8 It is a schematic overall structure diagram of a first elastomer;

[0047] Figure 9 It is a side view of the overall structure of the first elastomer;

[0048] Figure 10 It is a front view of the overall structure group of the first elastomer;

[0049] Figure 11 It is a top view of the structure where the first elastomer is inserted into the first elastomer groove;

[0050] Figure 12 It is a schematic structure diagram of the first elastomer groove formed in an arc shape on the body of the rotor core;

[0051] Figure 13 It is a schematic structure diagram of an outer retaining bridge;

[0052] Figure 14 It is the three - view drawing of the magnetic body;

[0053] Figure 15 It is a schematic overall structure diagram of another structure of the rotor core;

[0054] Figure 16 It is Figure 15 a side view of;

[0055] Figure 17 It is Figure 15 a schematic explosion structure diagram of;

[0056] Figure 18 It is a schematic structure diagram of a first punching piece;

[0057] Figure 19 It is another schematic structure diagram of a second elastomer groove formed on the first punching piece;

[0058] Figure 20 It is Figure 19 a side view of;

[0059] Figure 21 It is a schematic structure diagram of a third elastomer groove formed on a second punching piece;

[0060] Figure 22 It is a schematic structural diagram of the first punching piece;

[0061] Figure 23 It is a circle of the outermost edge structure of the magnetic body;

[0062] Figure 24 It is a schematic structural diagram of the overall stator assembly;

[0063] Figure 25 It is an exploded schematic structural diagram of the overall stator assembly

[0064] Figure 26 It is a schematic structural diagram of the connection structure of the winding support, the wiring seat, the stator core and the split support;

[0065] Figure 27 It is Figure 26 a side view of;

[0066] Figure 28 It is a schematic structural diagram of the overall winding;

[0067] Figure 29 It is a schematic structural diagram of the overall split support;

[0068] Figure 30 It is a schematic structural diagram of the overall split support from another angle;

[0069] Figure 31 It is a schematic structural diagram of the overall split support from yet another angle;

[0070] Figure 32 It is a schematic structural diagram of the positions of the wire hanging post and the wire folding post of the split support;

[0071] Figure 33 It is a schematic structural diagram of the positions of the surrounding part and the wire part;

[0072] Figure 34 It is a schematic structural diagram of the wire part;

[0073] Figure 35 It is a schematic structural diagram of the overall winding support;

[0074] Figure 36 It is the front view of the winding support;

[0075] Figure 37 It is the top view of the winding support;

[0076] Figure 38 It is a schematic structural diagram of the overall first piercing terminal;

[0077] Figure 39 It is the front view of the first piercing terminal;

[0078] Figure 40It is a side view of the first piercing terminal;

[0079] Figure 41 It is a schematic diagram of the overall structure of the second piercing terminal;

[0080] Figure 42 It is a front view of the second piercing terminal;

[0081] Figure 43 It is a schematic diagram of the overall structure of the three-phase wiring row;

[0082] Figure 44 It is a front view of the three-phase wiring row;

[0083] Figure 45 It is a schematic diagram of the structure of the three-phase wiring row terminal;

[0084] Figure 46 It is a side view of the three-phase wiring row;

[0085] Figure 47 It is a schematic diagram of the connection structure of the three-phase wiring row, the first wiring seat and the phase wire;

[0086] Figure 48 It is a schematic diagram of the overall structure of the vehicle provided in the exemplary embodiment of the present disclosure;

[0087] Explanation of reference numerals:

[0088] 1. Vehicle; 10. Motor;

[0089] 100. Stator assembly;

[0090] 110. Winding bracket; 11a. Buckle; 11b. Winding space;

[0091] 111. Winding body; 111a. Upper layer of the winding bracket; 111b. Middle layer of the winding bracket; 111c. Lower layer of the winding bracket;

[0092] 112. Winding part; 113. Lower wall structure; 114. Wire passing baffle;

[0093] 120. Wiring seat;

[0094] 121. First wiring seat; 122. Second wiring seat; 122a. Accommodating groove; 122b. Wire passing notch; 123. Hanging wire post;

[0095] 130. Split bracket;

[0096] 131. Surrounding part; 131a. Groove; 1311. Surrounding body;

[0097] 132. Connecting part; 1321. First connecting part; 1322. Second connecting part;

[0098] 1323. Hanging wire post;

[0099] 133. Conductor part; 133a. Conductor wall surface;

[0100] 1331. Folding line post; 1331a. First turning surface; 1331b. Second turning surface; 1331c. Anti - misalignment surface;

[0101] 131b. Card slot;

[0102] 134. Support platform;

[0103] 140. Piercing terminal; 141. First piercing terminal; 141a. Barbed part; 141b. Elastic sheet structure;

[0104] 142. Second piercing terminal;

[0105] 143. Three - phase connection row; 1431. Three - phase connection row body; 1432. Three - phase connection row terminal; 1433. Reinforcing structure; 1434. Clearance groove; 1435. Concave pit structure; 1436. Cutting groove;

[0106] 150. Stator core;

[0107] 160. Winding; 161. Phase wire; 161a. First lead part; 161b. Second lead part;

[0108] 200. Rotor assembly;

[0109] 210. Rotor core; 210a. Assembly groove; 210b. Inner surface of the groove;

[0110] 211. Body; 211a. Shaft hole; 2111. First punching sheet; 2112. Second punching sheet; 2113. Third punching sheet;

[0111] 210c. Elastic body groove; 210c1. First elastic body groove; 210c2. Second elastic body groove; 210c3. Third elastic body groove;

[0112] 220. Magnetic body; 221. Outer surface; 222. Inner surface;

[0113] 230. Elastic body;

[0114] 231. Contact part; 2311. First contact part; 2311a. Inner bending structure; 2311b. Outer bending structure;

[0115] 2312. Second contact part;

[0116] 2301. First elastic body; 2302. Second elastic body;

[0117] 240. Outer retaining bridge;

[0118] 240a, slot wall surface;

[0119] 240b, relief plane;

[0120] 241, claw part;

[0121] 250, connecting body; 251, spanning part. Specific embodiments

[0122] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part 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 efforts belong to the protection scope of the present application.

[0123] According to the first aspect of the present application, the present application provides a motor 10, refer to Figure 1 , including a stator assembly 100 and a rotor assembly 200. The stator assembly 100 and the rotor assembly 200 cooperate with each other, have good performance, and effectively extend the service life of the motor 10.

[0124] The rotor assembly 200 and the stator assembly 100 are movably connected. That is, the rotor assembly 200 is located inside the stator assembly 100, and the rotor assembly 200 rotates relative to the stator assembly 100, thereby realizing the conversion of mechanical energy and electrical energy.

[0125] In this embodiment, the axis of the power output shaft of the motor 10 is defined as the central axis, so as to be able to explain the directions of the stator assembly 100 and the rotor assembly 200.

[0126] According to the second aspect of the present application, refer to Figure 1 and Figure 2 , a stator assembly 100 is provided. The stator assembly 100 includes a stator core 150, a winding support 110, a plurality of terminal blocks 120, and a split support 130.

[0127] Among them, the stator core 150 and the winding support 110 are connected. The winding support 110 is used for winding the winding 160. Each terminal block 120 is used to electrically connect the winding 160 wound by the winding support to the outside. The split support 130 is detachably connected to the winding support 110, and the split support 130 is arranged between the winding support 110 and the terminal block 120. After the terminal block 120 is installed on the winding support 110 by using the split support 130 and then the winding 160 is wound on the winding support 110, the winding of the winding 160 and the electrical connection of the winding 160 are realized.

[0128] Reference Figure 35 The winding support 110 is made of injection plastic and formed into a skeleton structure through an injection molding process, and the winding support 110 is integrally injection molded on the stator core 150.

[0129] Reference Figures 35 to 37 The winding support 110 includes a winding body 111 and a winding part 112. The winding body 111 has a winding space 11b. The winding part 112 is formed on the winding body 111 and located within the winding space 11b. The winding part 112 is for the winding 160 to wind around, and the wire ends of the winding 160 are introduced into the terminal block 120 and then electrically connected to the outside. For example, after the wire ends of the winding 160 are introduced into the terminal block 120, the wire ends are electrically connected to the outside through the piercing terminal 140.

[0130] An insulating layer with a certain wall thickness is formed on the winding body 111 and the winding part 112 to protect the winding 160 during the winding process and insulate the winding 160 from the stator core 150.

[0131] Reference Figure 36 The winding body 111 includes a winding support upper layer 111a, a winding support middle layer 111b, and a winding support lower layer 111c from top to bottom.

[0132] The split support 130 is detachably connected to the winding support upper layer 111a. A plurality of winding parts 112 are provided on the winding support middle layer 111b, and an insulating layer is formed on the winding parts 112. The winding support lower layer 111c is used to support the winding 160 to pass through between the teeth of the stator core 150.

[0133] The winding support lower layer 111c has a lower wall structure 113. The bridge connection wire of the winding 160 between the teeth of the stator core 150 runs outside the lower wall structure 113. The wire passing baffle 114 is provided between adjacent lower frame wall structures, and the bridge connection wire between the teeth needs to pass through the wire passing baffle 114.

[0134] The winding support lower layer 111c has several wire passing baffles 114. The wire passing baffles 114 adopt an incomplete equal height design, so that the bridge connection wires between the teeth of the same phase are set to be of equal height, the bridge connection wires between the teeth of different phases are set to be of unequal height, and the bridge connection wires of the three phases can be orderly divided into upper, middle, and lower layers to avoid accumulation.

[0135] Reference Figures 29 to 34, the split bracket 130 includes a surrounding portion 131, a connecting portion 132, and a wire portion 133. The surrounding portion 131 surrounds at least one central axis. The connecting portion 132 is fixedly connected to the terminal block 120, and the connecting portion 132 is disposed between the wire portion 133 and the terminal block 120. The wire portion 133 has a wire wall surface 133a. The winding 160 wound around the winding bracket 110 is introduced over the connecting portion 132 to the terminal block 120 by using the wire wall surface 133a, and in the circumferential direction of the central axis, the wire wall surface 133a is disposed at least between two terminal blocks 120.

[0136] By providing the winding bracket 110, a plurality of terminal blocks 120, and the split bracket 130, the winding 160 is wound around the winding bracket 110. The terminal block 120 is used to electrically connect the winding 160 wound around the winding bracket 110 to the outside. The split bracket 130 is detachably connected to the winding bracket 110. The split bracket 130 is disposed between the winding bracket 110 and the terminal block 120. The split bracket 130 includes a surrounding portion 131, a connecting portion 132, and a wire portion 133. The surrounding portion 131 surrounds at least one central axis. The connecting portion 132 is fixedly connected to the terminal block 120. The wire portion 133 has a wire wall surface 133a. The wire wall surface 133a guides the winding 160 wound around the winding bracket 110 to the connecting portion 132, and in the circumferential direction of the central axis, the wire wall surface 133a is disposed at least between two terminal blocks 120. During the winding process, the wire wall surface 133a can be used to guide the winding 160 wound around the winding bracket 110 to cross the connecting portion 132 and be connected to the terminal block, realizing the guiding of the winding of the winding 160, which is beneficial to the overall assembly of the stator assembly 100.

[0137] The winding 160 includes a phase wire 161. The phase wire 161 has a first lead portion 161a and a second lead portion 161b. After connecting the stator core 150 to the winding bracket 110 and connecting the split bracket 130 to the winding bracket 110, the phase wire 161 is wound around the winding portion 112 of the winding bracket 110. Both the first lead portion 161a and the second lead portion 161b are respectively guided and extended to the connecting portion 132 through the wire wall surface 133a of the wire portion 133, and then cross the connecting portion 132 and are connected into the terminal block 120, completing the connection of the first lead portion 161a and the second lead portion 161b to the corresponding terminal block 120. Thus, the guiding winding of the winding 160 of the stator assembly 100 is completed, avoiding incorrect winding of the winding 160, effectively reducing the defective rate, and also being beneficial to winding the stator assembly 100 with an internal winding machine to improve production efficiency.

[0138] In some embodiments, refer to Figure 30, the connecting part 132 is provided with two, defined as the first connecting part 1321 and the second connecting part 1322. The first connecting part 1321 and the second connecting part 1322 are arranged oppositely along the circumferential direction of the central axis of the surrounding part 131 on the surrounding part 131, and are integrally formed with the surrounding part 131. Three terminal blocks 120 are respectively arranged on the first connecting part 1321 and the second connecting part 1322, that is, three first terminal blocks 121 are arranged on the first connecting part 1321, and three second terminal blocks 122 are arranged on the second connecting part 1322. The first terminal blocks 121 and the second terminal blocks 122 are respectively connected to the first lead part 161a and the second lead part 161b of the three-phase wires 161 of the winding 160.

[0139] The first connecting part 1321 and the second connecting part 1322 are formed as extended bosses on the surrounding part 131.

[0140] In some embodiments, the winding 160 includes three-phase wires 161, and each phase wire 161 passes through the wire wall surface 133a, so that the first lead part 161a and the second lead part 161b of each phase wire 161 are connected to the corresponding first terminal block 121 and second terminal block 122.

[0141] The first terminal blocks 121 are arranged on the first connecting part 1321. Three first terminal blocks 121 are formed on the first connecting part 1321, and the three first terminal blocks 121 are all arranged in isolation. Three second terminal blocks 122 are arranged on the second connecting part 1322. The three second terminal blocks 122 are formed on the second connecting part 1322, and the three second terminal blocks 122 are arranged in communication.

[0142] It can be understood that the three first terminal blocks 121 are all arranged in isolation on the extended boss, and the three second terminal blocks 122 are arranged in communication on different extended bosses.

[0143] In some embodiments, taking three terminal blocks as a group, two groups of terminal blocks 120 can be arranged on the split bracket 130. Both groups of terminal blocks 120 play the role of connecting the winding. Of course, three groups or four groups can also be arranged. Two of the groups of terminal blocks 120 are used to connect the winding, and the rest of the windings are in an idle state. After the used winding is damaged, it can be connected to the terminal block that was originally in an idle state, and there is no need to replace the split bracket as a whole.

[0144] In order to better wind each phase wire 161 of the winding 160 on the winding part 112 of the winding bracket 110 and be able to connect to the first terminal block 121 or the second terminal block 122 along the wire wall surface 133a, in some embodiments, the sum of the arcs occupied by the wire wall surface 133a in the circumferential direction of the central axis is greater than or equal to 90 degrees, which can better conduct the phase wires 161 of the winding 160.

[0145] In the circumferential direction along the central axis, a wire wall surface 133a is provided between the two furthest apart connection seats among the three first connection seats 121 and the three second connection seats 122, whereby the winding of the winding 160 can be maximally guided by the wire. In this case, the sum of the arcs occupied by the wire wall surface 133a in the circumferential direction of the central axis is 230°.

[0146] Of course, the sum of the arcs occupied by the wire wall surface 133a in the circumferential direction of the central axis can also be set to 120 or other angles, as long as it is greater than or equal to 90 degrees.

[0147] In some embodiments, at least a part of the wire wall surface 133a is configured as a surface of revolution with the central axis as the axis of revolution.

[0148] Reference Figure 33 and Figure 34 , all the wall surfaces of the wire wall surface 133a are parallel to the central axis, which can prevent the winding from sliding radially along the wire wall surface 133a towards the central axis, realizing the stability during the process of guiding the lead portion of the winding 160 along the wire wall surface 133a to the connection portion, and at the same time facilitating the shaping of the wire wall surface 133a.

[0149] Of course, a part of the wire wall surface 133a can also be parallel to the central axis and a part can intersect with the central axis, or all parts of the wire wall surface 133a can intersect with the central axis. Compared with the way that all of the wire wall surface 133a is parallel to the central axis, the shaping method of this wire wall surface 133a is more complex.

[0150] In some embodiments, the split bracket 130 is formed with a wire channel for the winding 160 wound by the winding bracket 110 to axially pass through along the central axis.

[0151] By providing the wire channel, the winding 160 wound by the winding bracket 110 can axially pass through the wire channel along the central channel, enter or exit the winding space 11b, connect the first lead portion 161a of each phase to the first connection seat 121 on the first connection portion 1321, and connect the second lead portion 161b to the second connection seat 122 on the second connection portion 1322, which is beneficial for the "needle-type internal winding" winding method to achieve winding, wire crossing, and wire winding.

[0152] In some embodiments, the wire channel is provided between the wire wall surface 133a and the surrounding portion 131.

[0153] Reference Figure 34, the surrounding portion 131 includes an inner wall surface. The wire channel is formed by the wire wall surface 133a and the inner wall surface. The wire channel is in communication with the winding space 11b, and is respectively the first wire channel and the second wire channel. After the first lead portion 161a is connected to the first connection terminal, the second lead portion 161b of the winding enters the winding space 11b along the wire wall surface 133a, winds around the winding portion 112 of the winding bracket 110, then passes out of the winding space 11b along the second wire channel, and is guided to the second terminal block 122 on the second connection portion 1322 along another wire wall surface 133a for connection, completing the winding of one phase wire 161.

[0154] When winding the wire of another phase, the same winding method is adopted. The difference is that the first terminal block 121 and the second terminal block 122 to which the other phase wire 161 is connected are different from the first terminal block 121 and the second terminal block 122 to which this phase wire 161 is connected.

[0155] In some embodiments, the surrounding portion 131 is provided with a plurality of grooves 131a communicating with the wire channel. The grooves 131a are mainly used to facilitate demolding when the split bracket 130 is demolded.

[0156] Reference Figure 30 , the groove 131a is set as a groove with a groove bottom. Corresponding to each groove 131a, a phase wire 161 distinguishing column is provided on the wire portion 133. The phase wire 161 distinguishing column winds corresponding to each phase wire 161. If the three phase wires 161 are defined as U, V, and W phase wires 161, the corresponding phase wire 161 distinguishing columns are the U phase wire 161 distinguishing column, the V phase wire 161 distinguishing column, and the W phase wire 161 distinguishing column.

[0157] In some embodiments, the wire portion 133 further has a plurality of folding columns 1331 at different positions in the circumferential direction of the set central axis. The folding columns 1331 extend substantially along the radial direction of the central axis.

[0158] By providing the folding columns 1331, when the phase wire 161 is guided to the terminal block 120 along the wire wall surface 133a, the phase wire 161 will pass through the folding columns 1331 to be connected to the terminal block 120. The folding columns 1331 can fold the phase wire 161, facilitating the connection of the phase wire 161 to the terminal block, and can form a wire area between the folding columns 1331 and the U phase wire 161 distinguishing column, the V phase wire 161 distinguishing column, and the W phase wire 161 distinguishing column to conduct the U, V, and W phase wires 161.

[0159] In some embodiments, each folding column 1331 includes a first turning surface 1331a and a second turning surface 1331b. The first turning surface 1331a is arranged parallel to the central axis, and the second turning surface 1331b is arranged perpendicular to the central axis.

[0160] When the phase line 161 is led along the wire wall surface 133a and the lead portion of the phase line 161 is connected to the terminal block 120, a part of the lead portion is bent after passing through the first turning surface 1331a and the second turning surface 1331b. Among them, in the circumferential direction of the central axis, the wire wall surface 133a extends from the first turning surface 1331a to the second turning surface 1331b, effectively increasing the acting area of the wire wall surface 133a.

[0161] Reference Figure 32 , both the first turning surface 1331a and the second turning surface 1331b are set as flat surfaces, and the first turning surface 1331a and the second turning surface 1331b are vertically and intersectingly arranged.

[0162] Each folding line column 1331 further includes an anti-fooling surface 1331c. The anti-fooling surface 1331c intersects obliquely with the central axis. When the phase line 161 passes through the anti-fooling surface 1331c, the phase line 161 will slide along the anti-fooling surface 1331c and will not stay on the anti-fooling surface 1331c. Then the phase line 161 is led again to ensure that the phase line 161 passes through the first turning surface 1331a and the second turning surface 1331b.

[0163] In order to avoid the accumulation of the phase line 161, the different folding line columns 1331 are axially arranged at different axial positions on the central axis. The folding line columns 1331 can be formed on the wire wall surface 133a, and the folding line columns 1331 are arranged at different heights, so as to orderly arrange the lead parts of the three phases into upper, middle and lower layers to avoid accumulation. At the same time, it can also enable the winding machine to achieve the effect of auxiliary commutation when routing on the split bracket 130.

[0164] In some embodiments, along the axial direction of the central axis, the folding line columns 1331 on the same side can be gradually increased in height.

[0165] In some embodiments, the terminal block 120 includes a receiving groove 122a, a wire passing notch 122b and a wire hanging column 1323.

[0166] Among them, the receiving groove 122a is formed on the terminal block 120. The piercing terminal 140 can be received by using the receiving groove 122a. The wire passing notch 122b can communicate the receiving groove 122a with the outside. The wire hanging column 1323 is arranged at the groove wall on the upper inner side of the receiving groove 122a in the radial direction of the central axis. In the axial direction of the central axis, the wire passing notch 122b is located between the notch of the receiving groove 122a and the wire hanging column 1323.

[0167] A receiving groove 122a is formed on the terminal block. At the same time, a wire-passing notch 122b is formed on the terminal block. The wire-passing notch 122b is communicated with the receiving groove 122a. The lead portion of the phase wire 161 enters into the receiving groove 122a. At the same time, the lead portion will extend out of the receiving groove 122a along the wire-passing notch 122b and is connected to the wire-hanging column 1323, which is convenient for the operation of the internal winding machine.

[0168] A support platform 134 can also be arranged in the receiving groove 122a to support the phase wire 161.

[0169] In order to facilitate the connection and disassembly of the winding bracket 110 and the split bracket 130, a plurality of card slots 131b are arranged at different positions in the circumferential direction of the central axis on the surrounding portion 131. At the same time, the winding bracket 110 includes a buckle 11a that can be embedded into the card slot 131b. The surrounding portion 131 includes a surrounding body 1311. The connecting portion 132 and the wire portion 133 are both formed on the surrounding body 1311, and the card slot 131b is opened on the surrounding body 1311.

[0170] The buckle 11a is used to connect with the card slot 131b to realize the connection and disassembly of the winding bracket 110 and the split bracket 130.

[0171] In some embodiments, referring to Figure 26 , the split bracket 130 should be installed on the winding bracket 110 before the winding 160 is wound around the winding bracket 110, and the distance H2 between the winding bracket 110 and the split bracket 130 should satisfy 3 ≤ h ≤ 10 mm. This enables the internal winding needle to smoothly perform a circumferential cyclic operation around the teeth of the stator core 150 to realize winding between the teeth.

[0172] In some embodiments, referring to Figures 38 to 47 , the stator assembly 100 further includes a piercing terminal 140. The piercing terminal 140 can be inserted into the receiving groove of the terminal block 120 to achieve a physical connection with the terminal block 120 and form an electrical connection with the winding 160.

[0173] The piercing terminal 140 includes a first piercing terminal 141 and a second piercing terminal 142. The first piercing terminal 141 is physically connected to the first terminal block 121, and the second piercing terminal 142 is connected to the second terminal block 122. The three piercing terminals are formed separately, and the three second piercing terminals 142 are integrally formed. When the piercing terminal is physically connected to the first terminal block 121, it is equivalent to the piercing terminal 140 being inserted into the receiving groove 122a.

[0174] Insert 3 single first piercing terminals 141 into the receiving groove 122a of the first terminal block 121, and insert 1 integral second piercing terminal 142 into the receiving groove 122a of the second terminal block 122.

[0175] Before the piercing terminal 140 is inserted into the corresponding receiving groove 122a, the phase line 161 should be placed on the support platform 134, and the lead part has been wound around the hanging pole 1323, and the receiving groove 122a and the support platform 134 can effectively support the phase line 161.

[0176] After the piercing terminal 140 is inserted into the receiving groove 122a, the piercing parts of the first piercing terminal 141 and the second piercing terminal 142 cut the paint film of the phase line 161 and pierce into the conductor of the phase line 161, so that the piercing terminal 140 and the phase line 161 are electrically connected.

[0177] refer to Figure 39 The piercing terminal 140 has a cutting groove 1436. After the piercing terminal 140 is inserted into the accommodating groove 122a, the phase line of the winding 160 is inserted into the cutting groove 1436, and the paint film on the surface of the winding is cut, thereby realizing the electrical connection between the winding 160 and the piercing terminal 140.

[0178] Each piercing terminal 140 is provided with a hook portion 141a that pierces the hook grooves on both sides of the receiving groove 122a, thereby realizing the physical connection between the piercing terminal 140 and the terminal block 120, so that the piercing terminal 140 is not easy to escape from the receiving groove 122a.

[0179] The split-molded first piercing terminal 141 has a spring structure 141b for electrically connecting the first piercing terminal 141 to the outside world. Then, the three-phase terminal block 143 is plugged onto the three first piercing terminals 141 and connected to the first piercing terminal 141 in the receiving groove 122a.

[0180] The three-phase terminal block 143 includes a three-phase terminal block body 1431 and a three-phase terminal block terminal 1432. The three-phase terminal block terminal 1432 is formed as a whole on the three-phase terminal block body 1431 through a plastic coating process. An air avoidance groove 1434 is provided at the tail of the three-phase terminal block 1432 to avoid the phase line 161 and avoid cutting the phase line 161 in the accommodating groove 122a.

[0181] A reinforcement structure 1433 is provided on the three-phase terminal block 1432, so that after adding a clearance groove 1434 at the tail of the three-phase terminal block 1432, on the one hand, the mechanical strength of the tail structure is increased so that it is not easy to bend when inserted, and on the other hand, its conductivity is increased.

[0182] refer to Figure 46 There is also a pit structure 1435 on the three-phase terminal block 1432. After the three-phase terminal block 143 is inserted into the first piercing terminal 141, the pit structure 1435 cooperates with the hook portion 141a of the first piercing terminal 141 to prevent the piercing terminal from being easily pulled out.

[0183] In the third aspect of the present application, with reference to Figures 3 to 6 , a rotor assembly is provided. The rotor assembly 200 includes a rotor core 210 and a magnetic body 220. The material of the magnetic body 220 is neodymium iron boron or ferrite. Before the magnetic body 220 is installed in the assembly groove 210a, it is not magnetized. After the rotor core 210, the rotating shaft, the magnetic body 220, and the abutting portion 231 of the elastic body 230 are assembled into an integral body, a special device is used for magnetization.

[0184] The rotor core 210 is formed with a plurality of assembly grooves 210a distributed along the circumferential direction of the rotor assembly 200. At least a part of the magnetic body 220 is received in the assembly groove 210a. The rotor core 210 includes a body, and the body is formed by stacking a plurality of punching sheets along the axial direction of the electronic rotor. The punching sheets are formed into an integral body through processes such as self-locking points, rivets, adhesives, and welding.

[0185] Among them, a shaft hole 211a is formed on the body. That is to say, holes are opened on each punching sheet. During the process of stacking a plurality of punching sheets, the holes on each punching sheet are arranged opposite to each other, and a body with a shaft hole 211a can be formed.

[0186] The assembly groove 210a on the rotor core 210 is formed by opening an opening groove in the circumferential direction of each punching sheet. During the process of stacking a plurality of punching sheets, the opening grooves at corresponding positions on each punching sheet are arranged opposite to each other to form a rotor core 210 with a plurality of assembly grooves 210a.

[0187] The rotor core 210 forms or houses an elastic body 230. The elastic body 230 has an abutting portion 231 that at least partially intrudes into the assembly groove 210a when the elastic body 230 is in a natural state. In the radial direction of the rotor assembly 200, the abutting portion 231 is disposed between the body and the magnetic body 220, so that the elastic body 230 biases the magnetic body 220 at least in the radial direction of the rotor core 210.

[0188] By forming a plurality of assembly grooves 210a distributed circumferentially along the rotor assembly 200 on the rotor core 210, the magnetic body 220 is at least partially received in the assembly grooves 210a to complete the installation of the magnetic body 220 and the rotor core 210. At the same time, the rotor core 210 includes a main body and an elastic body 230. A shaft hole 211a is formed on the main body, and the elastic body 230 is formed or received on the rotor core 210. The elastic body 230 has an abutting portion 231 that at least partially penetrates into the assembly groove 210a when the elastic body 230 is in a natural state. In the radial direction of the rotor assembly 200, the abutting portion 231 is disposed between the main body and the magnetic body 220, so that the elastic body 230 biases the magnetic body 220 at least in the radial direction of the rotor core 210, and further enables the elastic body 230 to apply a biasing force to the magnetic body 220, realizing the stable installation of the magnetic body 220 and the rotor core 210, improving the use stability of the rotor assembly 200, and ensuring the performance of the motor 10.

[0189] The elastic body 230 biases the magnetic body 220 at least in the radial direction of the rotor core 210. The biasing force received by the magnetic body 220 in the radial direction can prevent the magnetic body 220 from moving axially and radially. Among them, preventing the magnetic body 220 from moving radially is mainly that the biasing force balances the centrifugal force, and preventing the magnetic body 220 from moving axially is mainly relying on the static friction force received by the magnetic body 220 in the axial direction, so as to achieve the effect of stable installation of the magnetic body 220 relative to the rotor core 210 both radially and axially.

[0190] In some embodiments, the magnetic body 220 has an arc-shaped outer surface 221 and a flat inner surface 222.

[0191] Reference Figure 14 , the outer surface 221 and the inner surface 222 are disposed opposite to each other in the radial direction, the outer surface 221 is disposed outside the assembly groove 210a, the inner surface 222 is disposed inside the assembly groove 210a, and the abutting portion 231 is disposed between the main body and the inner surface 222.

[0192] By disposing the outer surface 221 and the inner surface 222 opposite to each other in the radial direction, disposing the outer surface 221 outside the assembly groove 210a, disposing the inner surface 222 inside the assembly groove 210a, and disposing the abutting portion 231 between the main body and the inner surface 222, the acting area of the magnetic body 220 receiving the biasing force transmitted from the abutting portion 231 can be effectively increased, and the installation stability between the magnetic body 220 and the rotor core 210 can be improved.

[0193] In some embodiments, the abutting portion 231 can be in direct contact with the magnetic body 220 for direct transmission of the biasing force, avoiding loss of the biasing force and realizing stable connection between the rotor core 210 and the magnetic body 220.

[0194] Alternatively, an intermediate member may be provided between the abutting portion 231 and the magnetic body 220. The intermediate member may be in the form of a sheet. By using the sheet-like intermediate member, the biasing force applied by the abutting portion 231 to the magnetic body 220 can be made uniform, avoiding the situation where the magnetic body 220 is skewed due to uneven force.

[0195] In some embodiments, the built-in surface 222 is parallel to the axial direction of the rotor assembly 200 and the generatrix direction of the outer surface 221.

[0196] By making the built-in surface 222 parallel to the axial direction of the rotor assembly 200 and the generatrix direction of the outer surface 221, the effect of the built-in surface 222 facing the abutting portion 231 is achieved, further improving the installation stability between the magnetic body 220 and the rotor core 210.

[0197] In some embodiments, the rotor core 210 has a plurality of inner surface portions 210b of the bottom of the assembly grooves 210a formed therein; the rotor core 210 forms an elastic body groove 210c at the inner surface portion 210b for accommodating at least a part of the elastic body 230.

[0198] By forming the elastic body groove 210c for accommodating at least a part of the elastic body 230 at the inner surface portion 210b of the rotor core 210, after the magnetic body 220 is assembled into the assembly groove 210a, during the rotation of the rotor assembly 200, after the abutting portion 231 of the elastic body 230 receives the reverse biasing force applied by the magnetic body 220, at least a part of the elastic body 230 can perform a fine adjustment of movement in the elastic body groove 210c, avoiding a large degree of deformation of the elastic body 230 and also avoiding the magnetic body 220 from moving axially, thereby extending the overall service life of the rotor assembly 200.

[0199] In order to further avoid the axial movement of the magnetic body 220 after the magnetic body 220 is assembled into the assembly groove 210a, in some embodiments, the rotor core 210 further includes a plurality of outer retaining bridges 240. Each outer retaining bridge 240 has a wall surface portion 240a of the groove wall forming the assembly groove 210a. The portion of the magnetic body 220 located in the assembly groove 210a contacts the wall surface portion 240a, thereby generating a static friction force between the wall surface portion 240a and the magnetic body 220 to avoid the axial movement of the magnetic body 220. In cooperation with the abutting portion 231 of the elastic body 230, the axial and radial movement of the magnetic body 220 is restricted.

[0200] In the radial direction of the rotor assembly 200, the outermost edge of the outer retaining bridge is located inside the outermost edge of the magnetic body 220. Refer to Figure 23 , the diameter of the circle formed by the outermost edge of the outer retaining bridge 240 is smaller than the diameter of the circle formed by the outer circle of the magnetic body 220. That is, the outer retaining bridge 240 is arranged in a sunken manner relative to the magnetic body 220.

[0201] The outer retaining bridge 240 also has a relief plane 240b that is recessed at least radially inwardly along the rotor assembly 200, and the relief plane 240b is connected between two groove wall surfaces 240a.

[0202] By using the combination of the sunken outer retaining bridge 240 and the inwardly recessed relief plane 240b, and the matching stator core 150, the magnetic circuit of the motor 10 can be optimized, obtaining a lower back electromotive force distortion rate, reducing torque ripple, reducing the harmonic content of the 5th and 7th orders, and improving the noise.

[0203] Reference Figure 13 , there is a smooth transition claw portion 241 between the relief plane 240b and the groove wall surface 240a. The claw portion 241 can prevent the magnetic body 220 from disengaging from the assembly groove 210a when the magnetic body 220 is installed in the assembly groove 210a.

[0204] In some embodiments, a plurality of elastic bodies 230 are provided in the axial direction of the rotor assembly 200, or a plurality of abutting portions 231 can be provided, or a plurality of elastic bodies 230 and abutting portions 231.

[0205] Reference Figures 4 to 11 , when a plurality of elastic bodies 230 are provided in the axial direction of the rotor assembly 200, the elastic body 230 is defined as the first elastic body 2301 as a component that can be separately assembled onto the body of the rotor core 210. At this time, the abutting portion 231 is a part of the first elastic body 2301 and applies a biasing force to the magnetic body 220.

[0206] In some embodiments, the first elastic body 2301 has a plurality of first abutting portions 2311, which can increase the positions for applying a biasing force to the magnetic body 220.

[0207] Reference Figure 11 , the first elastic body 2301 is a part separately assembled onto the body. The elastic body groove 210c that accommodates part of the first elastic body 2301 is defined as the first elastic body groove 210c1. At least part of the first abutting portions 2311 of the first elastic body 2301 penetrate into the assembly groove 210a, facilitating the assembly of the rotor core 210, the magnetic body 220, and the elastic body, facilitating operation, and preventing the magnetic body 220 from moving radially.

[0208] The overall height of the first projectile groove 210c1 can be the same as the height of the body. That is to say, an opening is correspondingly formed on all the punching sheets forming the body. When all the punching sheets are stacked, the openings at the corresponding positions are also aligned to form the first projectile groove 210c1. The first projectile groove 210c1 is communicated with the assembly groove 210a. A plurality of first abutting portions 2311 on the first elastic body 2301 are biased towards the magnetic body 220. And the first projectile groove 210c1 is integrally formed on the body. The forming method is simple and is convenient to be applied to production.

[0209] The first elastic body 2301 can be configured as a columnar structure with a plurality of bending structures. The first elastic body 2301 has a plurality of first abutting portions 2311. Each first abutting portion 2311 includes an inwardly bent inner bending structure 2311a or an outwardly bent outer bending structure 2311b that bends inwardly in the radial direction of the rotor assembly 200. The inner bending structure 2311a and the outer bending structure 2311b are arranged at different positions in the axial direction of the rotor assembly 200.

[0210] By arranging the inner bending structure 2311a and the outer bending structure 2311b at different positions in the axial direction of the rotor assembly 200 and biasing them towards the magnetic body 220 by using the inner bending structure 2311a and the outer bending structure 2311b, the connection stability between the rotor core 210 and the magnetic body 220 is further improved when the subsequent rotor assembly 200 rotates.

[0211] Reference Figure 8 、 Figure 9 and Figure 10 , the first elastic body 2301 can be set as a cylindrical structure. The first elastic body 2301 includes a first elastic body. The first elastic body is arranged vertically. The inwardly bent inner bending structure 2311a or the outwardly bent outer bending structure 2311b is a structure with a curved surface and is smoothly transitioned with the first elastic body. Correspondingly, the first projectile groove 210c1 is set as an arc shape, and the opening forming the first projectile groove 210c1 is also set as an arc shape, for example, it can be an arc shape of three-quarters of a circle.

[0212] In some embodiments, the inwardly bent inner bending structure 2311a or the outwardly bent outer bending structure 2311b is in direct contact with the body or the magnetic body 220, and the inner bending structure 2311a and the outer bending structure 2311b are set to be completely the same.

[0213] In order to more conveniently insert the first elastic body 2301 into the first elastic body groove 210c1 and apply a certain extrusion force between the body and the magnetic body 220 at the same time, in some embodiments, the height of the peak and valley of the inner bending structure 2311a and the outer bending structure 2311b is defined as H, the diameter of the first elastic body groove 210c1 is defined as φD, and the vertical distance from the bottom of the first elastic body groove 210c1 to the inner surface 210b of the assembly groove 210a is defined as C. Then the relationship among the three satisfies:

[0214] C < D < H, and H - C = 0.1 - 0.5 mm.

[0215] In this setting method, the first elastic body 2301 can be more conveniently inserted into the first elastic body groove 210c1, and at the same time, a certain extrusion force is applied between the body and the magnetic body 220. This extrusion force will not cause the magnetic body 220 to break, and at the same time, this extrusion force can act evenly on the contact part between the magnetic body 220 and the outer retaining bridge 240. When the magnetic body 220 has an axial movement relative to the rotor core 210, the acting force on the contact part between the magnetic body 220 and the outer retaining bridge 240 can generate a certain static friction force. This static friction force should be > 20 - 30 mg (where m is the weight of a single magnetic body 220), so as to prevent the magnetic body 220 from generating axial displacement relative to the rotor core 210.

[0216] In some embodiments, the rotor assembly 200 further includes a connecting body 250.

[0217] The connecting body 250 is respectively connected to two elastic bodies located at different circumferential positions of the rotor assembly 200. Each connecting body 250 has at least a spanning portion 251 extending in a direction that intersects obliquely with the radial direction of the rotor assembly 200.

[0218] Reference Figure 11 , when the elastic body is circular and cylindrical, the connecting body 250 is also set to be cylindrical. The connecting body 250 can connect two elastic bodies located at different circumferential positions of the rotor assembly 200, so as to bias the body and the magnetic body 220 at different circumferential positions. After the first elastic body 2301 is inserted into the first elastic body groove 210c1, the spanning portion 251 contacts the body.

[0219] Each connecting body 250 further includes a handle portion. After the first elastic body 2301 is inserted into the first elastic body groove 210c1, there is a spacing between the handle portion and the body, which is convenient for applying a force to the first elastic body 2301 during installation and disassembly.

[0220] In some embodiments, the elastic body and the connecting body 250 are integrally formed, and the structure is more stable. A snap ring can be used for the part where the elastic body and the connecting body 250 are integrally formed.

[0221] In some embodiments, with reference to Figure 4 , the direction in which the first abutting portion 2311 of the first elastomer 2301 applies a biasing force to the magnetic body 220 may be oblique to the magnetic body 220. At this time, the component of the biasing force applied by the first abutting portion 2311 to the magnetic body 220 in the radial direction can prevent the magnetic body 220 from moving axially in the radial direction.

[0222] In some embodiments, the direction in which the first abutting portion 2311 applies a biasing force to the magnetic body 220 may be directly facing the magnetic body 220. At this time, the biasing force applied by the first abutting portion 2311 to the magnetic body 220 is a relatively large positive biasing force, which can prevent the magnetic body 220 from moving axially in the radial direction to a large extent.

[0223] In some embodiments, when a plurality of abutting portions are provided in the axial direction of the rotor assembly 200, with reference to Figures 15 to 23 , the elastomer is directly formed on the body of the rotor core 210 as a part of the body of the rotor core 210. The abutting portion is a part of the body. After the magnetic body 220 is installed in the assembly groove 210a, the abutting portion applies a biasing force to the magnetic body 220. The elastomer formed on the body of the rotor core 210 is defined as the second elastomer 2302. Correspondingly, the abutting portion on the second elastomer 2302 is defined as the second abutting portion 2312. The elastomer groove accommodating at least a part of the second elastomer 2302 is defined as the second elastomer groove 210c2. The punching sheet where the second elastomer 2302 is located is defined as the first punching sheet 2111. The punching sheet adjacent to the first punching sheet 2111 below the body is defined as the second punching sheet 2112.

[0224] With reference to Figure 19 , a first square opening is formed in the circumferential direction of the first punching sheet 2111, and the second elastomer 2302 is formed in the first square opening of the first punching sheet 2111. A second square opening is formed in the second punching sheet 2112. After all the second punching sheets 2112 are stacked, the first square openings are arranged opposite to each other to form the second elastomer groove 210c2, and the second square openings are arranged opposite to each other to form the third elastomer groove 210c3. After the punching sheets are stacked to form the body, the second elastomer 2302 located in the second elastomer groove 210c2 will bend towards the third elastomer groove 210c3 and has elasticity. After the magnetic body 220 is assembled into the assembly groove 210a, a part of the second elastomer 2302 will invade into the assembly groove 210a and then be in biasing contact with the magnetic body 220, so as to apply a biasing force to the magnetic body 220.

[0225] The second elastomer 2302 is integrally formed with the first punching piece 2111 so that the second elastomer 2302 and the body are integrally provided. By the combined setting of the second elastomer 2302 and the outer retaining bridge 240, axial and radial limiting of the magnetic body 220 can be achieved. After the magnetic body 220 is inserted into the assembly groove 210a, the second elastomer 2302 will further fold and deform, and extrude the magnetic body 220 outward, generating a certain static friction force in the axial direction, thereby restricting the axial movement of the magnetic body 220.

[0226] The second elastomer 2302 can be set as a sheet structure, and the thickness of the second elastomer 2302 and the first punching piece 2111 is uniformly equal, both set to t. The width of the second elastomer groove 210c2 is set to B, which is also equivalent to the width of the opening in the first direction being set to B. Then: B≥2t. After allowing the magnetic body 220 to apply a reverse biasing force to the second elastomer 2302, it is ensured that part of the second elastomer 2302 can be smoothly located in the second elastomer groove 210c2 to avoid excessive stress concentration.

[0227] In order to better set the connection structure between the second elastomer 2302 on the first punching piece 2111 and the second punching piece 2112, the angle between the second elastomer 2302 and the first punching piece 2111 can be defined as β. Then: 30°≤β≤60°.

[0228] The length of the second elastomer 2302 is L1, and usually L1≥3t. The circle where the outermost edge of the second elastomer 2302 is located cannot exceed the diameter of the circle where the outermost edge of the rotor core 210 is located.

[0229] In some embodiments, the first punching pieces 2111 are grouped in 1 to 3 pieces. After the second elastomers 2302 on each 1 - 3 first punching pieces 2111 are stacked together, the length from the topmost first punching piece 2111 to the bottommost first punching piece 2111 is defined as L2. Then L2=(1 - 3)*t. In the body of a rotor core 210, usually ≥2 groups are provided.

[0230] To avoid the influence of slotting on the performance of the motor 10, the width of the third elastomer groove 210c3 on the second punching piece 2112 is set to A1. Then:

[0231] A1<D<A1 + 2B, 1.05*L2≤C≤1.3*L2.

[0232] The second punching sheet 2112 usually uses multiple sheets as a group. After stacking, the length from the topmost second punching sheet 2112 to the bottommost second punching sheet 2112 is defined as L3, and the length L3 = (3 - 8) * t, and it satisfies L3 > L1. In a core, the number of groups of the second punching sheets 2112 is the same as that of the first punching sheets 2111.

[0233] The bending of the second elastic body 2302 of the first punching sheet 2111 points towards the punching sheet. A group of second punching sheets 2112 are arranged connected to a group of first punching sheets 2111, and the second punching sheets 2112 are below the first punching sheets 2111.

[0234] The first punching sheets 2111 and the second punching sheets 2112 cannot be placed on the topmost and bottommost layers of the body. On both sides of the first punching sheets 2111 and the second punching sheets 2112, 2 - 10 third punching sheets 2113 will be provided.

[0235] By providing a plurality of elastic bodies or abutting parts in the axial direction of the rotor assembly 200, it is convenient for shaping and installation.

[0236] When at least part of the magnetic body 220 is accommodated in the assembly groove 210a, the abutting part on the body will apply a biasing force to the magnetic body 220 at least in the radial direction of the rotor core 210, avoiding the magnetic body 220 from moving axially, ensuring that the magnetic body 220 can be stably arranged in the assembly groove 210a, and the method of forming the second elastic body 2302 on the rotor core 210 can simplify the installation steps and save assembly time.

[0237] According to the fourth aspect of the present application, a vehicle 1 is provided, including the above-mentioned motor 10. The vehicle 1 has all the beneficial effects of the above-mentioned motor 10, which will not be elaborated herein.

[0238] The vehicle 1 can be a fuel vehicle, a plug-in hybrid vehicle, a new energy vehicle, etc., and the present application does not make specific limitations on this.

[0239] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0240] In the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0241] The embodiments, implementation manners and related technical features of the present application can be combined and replaced with each other without conflict.

[0242] The above are only the preferred embodiments of the present application, and do not impose any formal restrictions on the present application. Although the present application has been described with emphasis on each embodiment, for the parts not detailed in a certain embodiment, reference can be made to the relevant parts of other embodiments. However, as long as it does not depart from the content of the technical solution of the present application, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still fall within the scope of the technical solution of the present application.

Claims

1. A rotor assembly, characterized in that: include: The rotor core is formed with a plurality of assembly grooves distributed along the circumference of the rotor assembly, and the rotor core comprises: ontology; a magnetic body, at least partially accommodated in the assembly groove; The rotor core is formed or contains: an elastic body having an abutment portion that at least partially intrudes into the assembly groove when the elastic body is in a natural state; Wherein, in the radial direction of the rotor assembly, the abutment portion is arranged between the body and the magnetic body, so that the elastic body biases the magnetic body at least in the radial direction of the rotor core.

2. The rotor assembly according to claim 1, characterized in that The magnetic body has an external surface and an internal surface; Wherein, the outer surface and the inner surface are arranged opposite to each other in the radial direction; the outer surface is arranged outside the assembly groove; the inner surface is arranged inside the assembly groove; and the abutment portion is arranged between the body and the inner surface.

3. The rotor assembly according to claim 2, characterized in that: The external surface is arranged in an arc shape.

4. The rotor assembly according to claim 2, characterized in that: The built-in surface is arranged to be flat.

5. The rotor assembly according to claim 2, characterized in that: The inner surface is parallel to the axial direction of the rotor assembly and the generatrix direction of the outer surface.

6. The rotor assembly according to claim 5, characterized in that The rotor core has a plurality of slot inner surfaces constituting the slot bottoms of the assembly slots; The rotor core forms an elastic body groove on the inner surface of the groove for accommodating at least a part of the elastic body.

7. The rotor assembly according to claim 1, characterized in that The rotor core further comprises: A plurality of outer stop bridges having groove wall surfaces constituting groove walls of the assembly groove; Wherein, in the radial direction of the rotor assembly, the outermost edge of the outer bridge is located on the inner side of the outermost edge of the magnetic body.

8. The rotor assembly according to claim 7, characterized in that The outer baffle bridge also has a avoidance surface which is recessed inwardly at least along the radial direction of the rotor assembly; Wherein, the avoidance surface is connected between two groove walls.

9. The rotor assembly according to any one of claims 1 to 8, characterized in that: A plurality of the elastic bodies and / or the abutting portions are arranged in the axial direction of the rotor assembly.

10. The rotor assembly according to claim 9, characterized in that The elastic body has a plurality of the contact portions.

11. The rotor assembly according to claim 10, characterized in that The elastic body is constructed as a columnar structure having a plurality of curved structures.

12. The rotor assembly according to claim 11, characterized in that The abutting portion includes an inner curved structure that curves inwardly in the radial direction of the rotor assembly or an outer curved structure that curves outwardly; the inner curved structure and the outer curved structure are arranged at different positions in the axial direction of the rotor assembly.

13. The rotor assembly according to claim 12, characterized in that The rotor assembly further comprises: A connecting body, connected to the two elastic bodies respectively, and the two elastic bodies are located at different circumferential positions of the rotor assembly; The connecting body at least has a spanning portion extending in a direction obliquely intersecting with the radial direction of the rotor assembly.

14. The rotor assembly according to claim 13, characterized in that The elastic body and the connecting body are integrally formed.

15. The rotor assembly according to claim 7, characterized in that The main body and the elastic body are integrally formed.

16. A motor, characterized in that: include: A rotor assembly, wherein the rotor assembly is a rotor assembly according to any one of claims 1 to 15; The stator assembly is movably connected to the rotor assembly.

17. A vehicle, characterized in that: Includes the motor as claimed in claim 16.

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