Electric machine and vehicle

Abstract

The present disclosure relates to the technical field of automobile parts, and particularly relates to a motor and a vehicle, the motor comprising a stator assembly, a stator shield and a rotor assembly; the stator assembly comprises a plurality of stator cores, the plurality of stator cores are arranged in a circumferential direction and surround a containing space, the end of the stator core close to the containing space is provided with a pole shoe at both ends in the circumferential direction, and a notch is formed between the two opposite pole shoes of the adjacent two stator cores; the stator shield is arranged in the containing space and is in a cylindrical structure; a reinforcing rib is protruded on the outer periphery of the cylinder of the stator shield; the reinforcing rib is at least partially located at the notch, a gap is formed between the side surface of the reinforcing rib and the end surface of the pole shoe, and a glue material is arranged in the gap; and the rotor assembly is arranged in the stator shield.

Description

Technical Field

[0001] This disclosure relates to the field of automotive parts technology, and more particularly to an electric motor and a vehicle. Background Technology

[0002] In some existing designs of electric motors, a shield is installed between the outer stator assembly and the inner rotor assembly to isolate the dry and wet chambers of the two regions. Ribs protrude from the outer periphery of the shield and extend into the space between the opposing pole shoes of two adjacent stator cores.

[0003] However, the ribs and pole shoes are usually in contact or clearance fit. When in contact fit, the stress at the contact point is large, and there is wear or even breakage, which affects the life of the parts and poses a safety hazard to the motor. When in clearance fit, the shield is prone to rotate with the rotor assembly after deformation, resulting in relative movement with the pole shoes and lack of effective support. Summary of the Invention

[0004] To overcome the problems existing in the related technologies, this disclosure provides an electric motor and a vehicle.

[0005] According to a first aspect of the present disclosure, an electric motor is provided, including a stator assembly, a stator shield, and a rotor assembly; the stator assembly includes a plurality of stator cores arranged circumferentially and surrounding to form a receiving space, each stator core having a pole shoe at both ends circumferentially near the receiving space, and a slot being formed between opposite pole shoes of two adjacent stator cores; the stator shield is disposed within the receiving space and has a cylindrical structure; reinforcing ribs protrude from the outer periphery of the cylindrical body of the stator shield; the reinforcing ribs are at least partially located at the slots, and a gap exists between the side of the reinforcing rib and the end face of the pole shoe, with adhesive material disposed within the gap; and the rotor assembly is disposed within the stator shield.

[0006] In some exemplary embodiments of this disclosure, the stator core is provided with a coil frame for winding a coil; an inner limiting wall is provided at one end of the coil frame near the stator shield; wherein the adhesive fills the gap and the space between the inner limiting wall and the pole shoe.

[0007] In some exemplary embodiments of this disclosure, an opening is formed between the two opposing inner limiting walls of the coil frame on which two adjacent stator cores are disposed, and the adhesive material and the adhesive material filling the winding cavity of the coil frame are connected at the opening to form an integral structure.

[0008] In some exemplary embodiments of this disclosure, the adhesive material is an epoxy resin potting compound.

[0009] In some exemplary embodiments of this disclosure, the pole shoe has an outer side facing away from the stator shield, and the reinforcing rib is staggered from the outer side of the pole shoe so that the reinforcing rib does not overlap with the outer side of the pole shoe in the radial direction.

[0010] In some exemplary embodiments of this disclosure, the distance between the reinforcing rib and the pole shoes on both sides is equal.

[0011] In some exemplary embodiments of this disclosure, the cross-sectional profile of the reinforcing rib includes a main arc segment and two transition arc segments; the transition arc segments are concave arc shapes, and the two transition arc segments are respectively connected between the two ends of the main arc segment and the outer surface of the cylinder.

[0012] In some exemplary embodiments of this disclosure, the center of the corresponding circle of the main arc segment falls within the range between the outer surface and the inner surface of the cylinder.

[0013] In some exemplary embodiments of this disclosure, the first radius of the corresponding circle of the main arc segment is 0.5mm to 10mm.

[0014] In some exemplary embodiments of this disclosure, the ratio of the first radius of the corresponding circle of the main arc segment to the second radius of the corresponding circle of the transition arc segment is 2 to 3.

[0015] In some exemplary embodiments of this disclosure, the connection points between the main arc segment and the two transition arc segments are respectively the first connection point and the second connection point, and the connection points between the two transition arc segments and the outer surface of the cylinder are respectively the third connection point and the fourth connection point; wherein, the ratio of the first distance between the first connection point and the second connection point to the second distance between the third connection point and the fourth connection point is greater than or equal to 1 / 2 and less than 1.

[0016] In some exemplary embodiments of this disclosure, the third distance between the end faces of the two pole shoes is greater than the first distance between the first connection point and the second connection point, and less than or equal to the second distance between the third connection point and the fourth connection point.

[0017] In some exemplary embodiments of this disclosure, the connection point between the transition arc segment and the outer surface of the cylinder is located on the extension line of the end face of the pole shoe.

[0018] In some exemplary embodiments of this disclosure, the cross-sectional profile of the reinforcing rib includes an arc segment, the two ends of which are respectively connected to the outer surface of the cylinder; the connection point between the arc segment and the outer surface of the cylinder is located on the extension line of the end face of the pole shoe, and the extension line extends tangentially along the arc segment at the connection point.

[0019] In some exemplary embodiments of this disclosure, the cross-section of the reinforcing rib is rectangular, triangular, circular, or elliptical.

[0020] In some exemplary embodiments of this disclosure, the two ends of the reinforcing rib extend beyond the two ends of the stator core along the axial direction.

[0021] In some exemplary embodiments of this disclosure, the stator shield is provided with a plurality of reinforcing ribs, the number of reinforcing ribs being equal to the number of slots, and the plurality of reinforcing ribs being arranged in a one-to-one correspondence with the plurality of slots.

[0022] In some exemplary embodiments of this disclosure, the number of reinforcing ribs is less than the number of slots, the slot with the reinforcing ribs is a first slot, the slot without the reinforcing ribs is a second slot, and adhesive material is disposed at the second slot; wherein, the first slot and the second slot are arranged alternately.

[0023] In some exemplary embodiments of this disclosure, the inner wall of the cylinder at the cylinder opening is provided with a guide slope, and the inclination angle of the guide slope relative to the axial direction is 20° to 45°.

[0024] According to a second aspect of the present disclosure, a vehicle is provided, wherein the vehicle includes the motor proposed in the present disclosure and described in the above embodiments.

[0025] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: The motor proposed in this disclosure includes a stator assembly, a stator shield, and a rotor assembly; the stator assembly includes multiple stator cores, which are arranged circumferentially and surround to form a receiving space. The ends of the stator cores near the receiving space have pole shoes at both ends circumferentially, and slots are formed between the opposite pole shoes of two adjacent stator cores; the stator shield is disposed within the receiving space and has a cylindrical structure; reinforcing ribs protrude from the outer periphery of the stator shield; the reinforcing ribs are at least partially located at the slots, and there is a gap between the side of the reinforcing rib and the end face of the pole shoe, with adhesive material disposed within the gap; the rotor assembly is disposed within the stator shield. Through the above design, this disclosure arranges the reinforcing ribs of the stator shield and the pole shoes on both sides in a gap manner, thereby avoiding wear problems caused by direct contact between the reinforcing ribs and the pole shoes, reducing contact stress, and extending the life of components. Based on this, the present disclosure provides adhesive material at the gap between the reinforcing rib and the pole shoe, using the adhesive material to bond the stator shield to the stator core, thereby strengthening the support point, preventing deformation of the stator shield, and helping to maintain the shape of the stator shield. Furthermore, because the stator shield can maintain a relatively stable structure within the motor, it provides a good sealing effect, better achieving dry and wet cavity isolation of the motor, and ensuring uniform fluid flow within the wet cavity.

[0026] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0028] Figure 1 This is a schematic diagram of the structure of an electric motor shown according to some exemplary embodiments of the present disclosure;

[0029] Figure 2 yes Figure 1 The diagram shows a cross-sectional view of the motor.

[0030] Figure 3 yes Figure 2 An enlarged view of part A in the image;

[0031] Figure 4 yes Figure 3 An enlarged view of part B in the image;

[0032] Figure 5 This is a partially enlarged cross-sectional view of the motor shown according to some other exemplary embodiments of the present disclosure;

[0033] Figure 6 yes Figure 1 A perspective view of the stator shield of the motor is shown;

[0034] Figure 7 This is an axonometric sectional view of the stator shield at one angle;

[0035] Figure 8 yes Figure 7 An enlarged view of part E in the image;

[0036] Figure 9 This is an axonometric sectional view of the stator shield from another angle;

[0037] Figure 10 yes Figure 9 An enlarged view of part F in the image;

[0038] Figure 11 This is a block diagram of a vehicle illustrated according to some exemplary embodiments of the present disclosure.

[0039] Explanation of reference numerals in the attached figures:

[0040] Detailed Implementation

[0041] Some embodiments of this disclosure will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. Various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but can be changed as will become apparent upon understanding this disclosure, except for operations that must be performed in a particular order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0042] The embodiments described in the following examples of this disclosure are not representative of all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0043] See Figure 1 The diagram illustrates a representative structural schematic of the motor proposed in this disclosure. In this exemplary embodiment, the motor proposed in this disclosure is described using an application in a vehicle as an example. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the relevant designs of this disclosure to other application scenarios, and these changes shall still be within the scope of the principles of the motor proposed in this disclosure.

[0044] like Figure 1 As shown, in one embodiment of this disclosure, the motor includes a housing 100 and a stator assembly 200, a stator shield 300, and a rotor assembly 400 disposed within the housing 100. (See also...) Figures 2 to 10 , Figure 2 The image shows a representative cross-sectional view of the motor. Figure 3 China representatively shows Figure 2 An enlarged view of part A in the image; Figure 4 China representatively shows Figure 3 An enlarged view of part B in the image; Figure 5 The image shows a representative enlarged cross-sectional view of the motor in some other exemplary embodiments. Specific sections and enlarged areas can be found in [reference needed]. Figure 4 Regarding Figure 3 The cropped and magnified area; Figure 6 A perspective view of the stator shield 300 is shown in the figure. Figure 7 The image shows a representative axial sectional view of the stator shield 300 at an angle, specifically cut along the stiffener 320. Figure 8 China representatively shows Figure 7 An enlarged view of part E in the image; Figure 9 The image shows a representative axial sectional view of the stator shield 300 from another angle, specifically at the angle where the cylinder 310 is cut in the circumferential direction at the position where the reinforcing ribs 320 are not provided. Figure 10 China representatively shows Figure 9 An enlarged view of part F in the figure. The structure, connection method, and functional relationship of the main components of the motor proposed in this disclosure will be described in detail below with reference to the above figures.

[0045] like Figures 1 to 4 , Figure 6 As shown, in one embodiment of this disclosure, the outer casing 100 may include a housing and end caps, which together form a receiving cavity for accommodating components such as the stator assembly 200, the rotor assembly 400, and the stator shield 300. The stator assembly 200 includes a plurality of stator cores 210 arranged circumferentially, such that the stator assembly 200 surrounds and forms a receiving space to accommodate the stator shield 300 and the rotor assembly 400, etc. This circumferential direction can be understood as... Figure 2The cross-sectional shape shown is circumferential. The stator core 210 has pole shoes 211 at both ends circumferentially near the receiving space, and a slot is formed between the opposing pole shoes 211 of two adjacent stator cores 210. The stator shield 300 is disposed within the receiving space and has a cylindrical structure, specifically a cylindrical body 310. A reinforcing rib 320 protrudes from the outer periphery of the cylindrical body 310. This reinforcing rib 320 is at least partially located at the slot formed between the opposing pole shoes 211, and a gap G exists between the side of the reinforcing rib 320 and the end face 2111 of the pole shoe 211. Adhesive material 330 is disposed within this gap G. The rotor assembly 400 is disposed within the stator shield 300. Accordingly, the stator shield 300 divides the internal receiving cavity of the outer casing 100 into dry and wet cavities, achieving isolation between the inner and outer parts. Specifically, the dry chamber is located outside the wet chamber, meaning the stator assembly 200 is located inside the dry chamber and the rotor assembly 400 is located inside the wet chamber. Adhesive material 330 is encapsulated within the dry chamber. The shielding cover's two ends are respectively pressed against the sealing rings mounted on the end caps and the sealing rings mounted on the housing, thus achieving separation of the dry and wet chambers. Through this design, the reinforcing ribs 320 of the stator shielding cover 300 and the pole shoes 211 on both sides are arranged with a gap, thereby avoiding wear problems caused by direct contact between the reinforcing ribs 320 and the pole shoes 211, reducing contact stress, and extending the life of components. Furthermore, adhesive material 330 is placed at the gap G between the reinforcing ribs 320 and the pole shoes 211, using adhesive material 330 to bond the stator shielding cover 300 to the stator core 210, providing support and strengthening, preventing deformation of the stator shielding cover 300, and helping to maintain the shape of the stator shielding cover 300. Furthermore, because the stator shield 300 maintains a relatively stable structure within the motor, it provides excellent sealing, better isolates the dry and wet chambers of the motor, and ensures uniform fluid flow within the wet chamber. Since the gap between the shield and the rotor is very small, when the shield deforms, it is easily scraped by the high-speed rotor during operation. By reinforcing the stator shield 300 with reinforcing ribs 320, pressure is reduced and deformation is prevented. This solves the problems of poor pressure resistance and eddy current losses in existing shields under high temperature and high pressure environments, facilitating the design of a high-efficiency, high-pressure-resistant shielded motor.

[0046] like Figure 3As shown, in one embodiment of this disclosure, the stator core 210 is provided with a coil frame 220 for winding a coil 230 (e.g., copper wire). An inner limiting wall 221 is provided at one end of the coil frame 220 near the stator shield 300. Based on this, adhesive material 330 can fill the aforementioned gap G and the space between the inner limiting wall 221 and the pole shoe 211. In other words, the inner limiting wall 221, the pole shoe 211, and the stator shield 300 (e.g., reinforcing rib 320) together enclose an adhesive-containing space, which includes the aforementioned gap G, and the adhesive material 330 fills within the adhesive-containing space. Through the above design, this disclosure utilizes the inner limiting wall 221 as the inner limiting for winding the coil 230, and forms a roughly trapezoidal (or rectangular, triangular, arc-shaped, etc.) adhesive space between the inner limiting wall 221 and the pole shoe 211, thereby increasing the arrangement space of the adhesive 330, especially increasing the arrangement space between the inner limiting wall 221 and the pole shoe 211, which helps to maintain the shape stability of the coil frame 220 and its inner limiting wall 221, and prevents the inner limiting wall 221, for example, made of plastic, from deforming and occupying the space of the gap G.

[0047] like Figure 3 As shown, in one embodiment of this disclosure, an opening 222 is formed between the two opposing inner limiting walls 221 of the coil frame 220 provided for two adjacent stator cores 210. Based on this, the adhesive material 330 filling the aforementioned adhesive space and the adhesive material filling the winding cavity of the coil frame 220 can be connected into a single structure at the opening 222. Through the above design, this disclosure utilizes the opening 222 to connect the adhesive spaces on both the inner and outer sides of the inner limiting wall 221, that is, the adhesive space located inside the inner limiting wall 221, including the gap G, and the outer adhesive space used for arranging the winding. Accordingly, this disclosure enables the adhesive materials respectively provided in these two adhesive spaces to form a single unit, using the adhesive material to bond the coil frame 220, coil 230, stator core 210, and stator shield 300 into a whole, making the overall structure more stable. In addition, the glue injection port provided on the motor end cover allows for simultaneous glue injection into the two glue-containing spaces in a single injection process, further simplifying the process and improving production efficiency.

[0048] In one embodiment of this disclosure, the adhesive 330 can be made of epoxy resin potting compound. The epoxy resin potting compound, when potted at 20°C to 25°C, has a Short D hardness of 85 to 100.

[0049] In one embodiment of this disclosure, the stator shield 300 may be made of non-metallic materials, such as Peek, PPA, PPS and other engineering plastics.

[0050] like Figure 3As shown, in one embodiment of this disclosure, the pole shoe 211 has an outer surface 2112 facing away from the stator shield 300 (i.e., facing away from the rotor assembly 400). The reinforcing rib 320 is staggered from the outer surface 2112 of the pole shoe 211, so that the reinforcing rib 320 and the outer surface 2112 of the pole shoe 211 do not overlap radially. In other words, the reinforcing rib 320 extends partially to the slot formed between the two opposing pole shoes 211. Radially, the reinforcing rib 320 may not extend outward (i.e., away from the rotor assembly 400) from the slot, or it may extend partially outward from the slot. When the reinforcing rib 320 extends partially out of the slot, the extended portion is still within the projection range of the slot and does not extend circumferentially to the outer surface 2112 of the two pole shoes 211. Through the above design, this disclosure simplifies the structure of the reinforcing rib 320 and facilitates the assembly of the stator shield 300 and the stator core 210. It also avoids the possibility of the protruding portion of the reinforcing rib 320 contacting the outer surface 2112 of the pole shoe 211, preventing scraping of the reinforcing rib 320 and the generation of debris when it comes into contact with the stator shield 300, which is beneficial for controlling the cleanliness and quality of the product. Furthermore, this disclosure utilizes the above design to provide more space for the adhesive material 330, further expanding the installation area of ​​the adhesive material 330 and improving the sealing and support effects.

[0051] like Figure 4 As shown, in one embodiment of this disclosure, the distance between the reinforcing rib 320 and the two side pole shoes 211 can be equal, that is, the first distance L1 and the second distance L2 shown in the figure are equal. In other words, the reinforcing rib 320 can be centrally arranged in the groove formed between the two oppositely arranged pole shoes 211. The above design can ensure that the position of the middle turning point of the outline of the reinforcing rib 320 (i.e., the connection point between the main arc segment 321 and the transition arc segment 322 described below) is uniformly consistent with the gap G of the two side pole shoes 211. Through the above design, this disclosure achieves the central arrangement of the reinforcing rib 320 in the groove, which is beneficial to the uniformity of the adhesive material 330 when it is placed in the gap G on both sides of the reinforcing rib 320, improves the filling effect of the adhesive material 330, and achieves uniform support on both sides.

[0052] like Figure 4 As shown, in one embodiment of this disclosure, the cross-sectional profile of the reinforcing rib 320 may include a main arc segment 321 and two transition arc segments 322. The transition arc segments 322 are concave arc shapes, and the two transition arc segments 322 are respectively connected between the two ends of the main arc segment 321 and the outer surface of the cylinder 310; that is, the two ends of the main arc segment 321 are respectively provided with arc-shaped transition chamfers. Through the above design, this disclosure can reduce the stress at the connection between the two ends of the cross-sectional profile of the reinforcing rib 320 and the cylinder 310, thereby improving the structural strength and stability of the stator shield 300.

[0053] like Figure 4As shown, based on the design of the cross-sectional profile of the reinforcing rib 320 including the main circular arc segment 321, in one embodiment of this disclosure, the center O1 of the corresponding circle of the main circular arc segment 321 can fall within the range between the outer surface and the inner surface of the cylinder 310. In other words, in the cross-sectional view of the cylinder 310, the center O1 can fall within the cross-sectional range of the cylinder wall of the cylinder 310. Through the above design, this disclosure can control the main circular arc segment 321 of the reinforcing rib 320 to maintain a better shape, avoiding the cross-sectional shape of the reinforcing rib 320 from being too wide and flat or too narrow and protruding. In other embodiments of this disclosure, the center O1 of the corresponding circle of the main circular arc segment 321 can also fall on the outer side of the outer surface or the inner side of the inner surface of the cylinder 310, and is not limited to this embodiment.

[0054] like Figure 4 As shown, the cross-sectional profile of the reinforcing rib 320 includes the design of the main circular arc segment 321. In one embodiment of this disclosure, the first radius R1 of the corresponding circle of the main circular arc segment 321 can be 0.5mm to 10mm, for example, 0.5mm, 1mm, 2mm, 5mm, 10mm, etc. Through the above design, this disclosure adopts a suitable range for the first radius R1 of the corresponding circle of the main circular arc segment 321. When the slot of the stator core 210 allows, the first radius R1 can be set slightly longer, thereby increasing the area of ​​the supporting force-bearing surface where the reinforcing rib 320 and the adhesive material 330 are combined, and improving the overall compressive strength of the stator shield 300.

[0055] In one embodiment of this disclosure, the thickness of the area of ​​the cylinder 310 without reinforcing ribs 320 can be 0.2mm to 1mm, for example, 0.2mm, 0.3mm, 0.5mm, 0.8mm, 1mm, etc.

[0056] In one embodiment of this disclosure, there is an air gap between the inner wall of the stator shield 300 and the rotor assembly 400. The width of the air gap can be 0.2mm to 1mm, for example, 0.2mm, 0.3mm, 0.5mm, 0.8mm, 1mm, etc.

[0057] like Figure 4 As shown, the cross-sectional profile of the reinforcing rib 320 includes a main circular arc segment 321 and a transition circular arc segment 322. In one embodiment of this disclosure, the ratio of the first radius R1 of the corresponding circle of the main circular arc segment 321 to the second radius R2 of the corresponding circle of the transition circular arc segment 322 can be 2 to 3, for example, 2, 9 / 4, 5 / 2, 8 / 3, 3, etc. Through the above design, this disclosure can ensure that the gap G between the reinforcing rib 320 and the pole shoe 211 meets the filling requirements of the adhesive material 330, thereby improving the filling effect of the adhesive material 330.

[0058] like Figure 4As shown, the cross-sectional profile of the reinforcing rib 320 includes a main arc segment 321 and a transition arc segment 322. In one embodiment of this disclosure, the connection points between the main arc segment 321 and the two transition arc segments 322 are the first connection point and the second connection point, respectively. The connection points between the two transition arc segments 322 and the outer surface of the cylinder 310 are the third connection point a1 and the fourth connection point a2, respectively. Based on this, the ratio of the first distance W1 between the first connection point and the second connection point to the second distance W2 between the third connection point a1 and the fourth connection point a2 can be greater than or equal to 1 / 2 and less than 1, for example, 1 / 2, 3 / 5, 5 / 8, 4 / 5, 9 / 10, etc. Through the above design, this disclosure can ensure that the gap G between the reinforcing rib 320 and the pole shoe 211 meets the requirements for filling with the adhesive material 330, thereby improving the filling effect of the adhesive material 330.

[0059] like Figure 4 As shown, based on the design of the cross-sectional profile of the reinforcing rib 320, including the main arc segment 321 and the transition arc segment 322, in one embodiment of this disclosure, the third distance W3 between the end faces 2111 of the two pole shoes 211 can be greater than the first distance W1 between the first connection point and the second connection point, and less than or equal to the second distance W2 between the third connection point a1 and the fourth connection point a2. Through the above design, this disclosure can ensure that the gap G between the reinforcing rib 320 and the pole shoe 211 meets the filling requirements of the adhesive material 330, thereby improving the filling effect of the adhesive material 330. For example, the aforementioned second distance W2 can actually be regarded as the overall width of the reinforcing rib 320. In this embodiment, this overall width includes both the main arc segment 321 and the two transition arc segments 322. In other words, the third connection point a1 and the fourth connection point a2 are the positions where the reinforcing rib 320 begins to protrude outward from the outer surface of the cylinder 310, that is, the "root" of the reinforcing rib 320. Based on this, it can be seen from the structure shown in the attached drawings that the end of the pole shoe 211 has a rounded corner structure, which can avoid the root of the reinforcing rib 320 to a certain extent. Accordingly, this disclosure designs the second distance W2 to be greater than or equal to the third distance W3, which can ensure the formation of the gap G while avoiding the cross-sectional shape of the reinforcing rib 320 being too "narrow", ensuring the structural strength of the reinforcing rib 320, avoiding local stress concentration, and facilitating the placement of the reinforcing rib 320 on the outer surface of the cylinder 310. In some other embodiments, if the pole shoe 211 does not adopt the above-mentioned rounded corner structure avoidance design, then theoretically the third distance W3 should be greater than or equal to the second distance W2, to avoid interference between the pole shoe 211 and the root of the reinforcing rib 320 or the gap G being too small when the third distance W3 is less than the second distance W2. Therefore, according to the actual shape of the pole shoe, this disclosure can flexibly design the relationship between the second distance W2 and the third distance W3.

[0060] like Figure 4As shown, the cross-sectional profile of the reinforcing rib 320 includes a transition arc segment 322. In one embodiment of this disclosure, the connection point between the transition arc segment 322 and the outer surface of the cylinder 310 is a second connection point. This second connection point can be referred to as the third connection point a1 and the fourth connection point a2 shown in the accompanying drawings. The second connection point can be located on the extension line c of the end face 2111 of the pole shoe 211. Through the above design, this disclosure can ensure that the starting point and ending point of the main arc segment 321 and the gap G between the pole shoe 211 are kept uniform, thereby improving the filling effect of the adhesive 330.

[0061] See Figure 5 , Figure 5 The diagram shows a partially enlarged cross-sectional view of an electric motor that embodies the principles of this disclosure in some other exemplary embodiments.

[0062] Different from Figure 4 The cross-sectional profile of the reinforcing rib 320 shown includes the design of the main circular arc segment 321 and the transition circular arc segment 322, as follows: Figure 5 As shown, in another embodiment of this disclosure, the cross-sectional profile of the reinforcing rib 320 may consist only of an arc segment 340, with both ends of the arc segment 340 connected to the outer surface of the cylinder 310. The two connection points between the arc segment 340 and the outer surface of the cylinder 310 are a fifth connection point b1 and a sixth connection point b2. These connection points may be located on the extension line c of the end face 2111 of the pole shoe 211, and this extension line c extends tangentially along the arc segment 340 at the aforementioned connection point.

[0063] It should be noted that, in Figure 4 or Figure 5 In the illustrated embodiments, the cross-sectional profile of the reinforcing rib 320 is entirely or partially an arc segment 340, which is used as an example for explanation. That is, the cross-section of the reinforcing rib 320 is approximately arc-shaped. In various possible embodiments that conform to the design concept of this disclosure, the cross-section of the reinforcing rib 320 may also be rectangular, triangular, or elliptical, etc., and is not limited to the above embodiments.

[0064] The shape design of the reinforcing rib 320 ensures that the gap G of the adhesive material 330 on both sides of the reinforcing rib 320 remains uniform, thereby ensuring balanced force and achieving the best bonding and support effect of the adhesive material 330.

[0065] In an embodiment not illustrated in this disclosure, the two ends of the reinforcing rib 320 may extend beyond the two ends of the stator core 210 along the axial direction. Through this design, this disclosure ensures that the reinforcing rib 320 is axially continuous within the slots formed by the two opposing pole shoes 211, further enhancing the bonding effect between the reinforcing rib 320 and the stator core 210.

[0066] like Figure 2 As shown, in one embodiment of this disclosure, the stator shield 300 may be provided with a plurality of reinforcing ribs 320, the number of which may be equal to the number of slots, and the plurality of reinforcing ribs 320 and the plurality of slots are arranged in a one-to-one correspondence.

[0067] Different from Figure 2 The illustrated embodiment uses a design where the number of reinforcing ribs 320 is equal to the number of slots. In other embodiments not shown in this disclosure, the number of reinforcing ribs 320 may be less than the number of slots; that is, some slots are provided with reinforcing ribs 320, while others are not. For ease of description, slots with reinforcing ribs 320 are defined as first slots, and slots without reinforcing ribs 320 are defined as second slots. Based on this, first and second slots can be arranged alternately. Alternating arrangement can be understood as alternating one-to-one, for example, arranging "one first slot, one second slot, one first slot, one second slot…" in a circumferential sequence. In this case, the number of slots (i.e., the number of stator cores 210) is twice the number of reinforcing ribs 320. Furthermore, alternating arrangement can also be understood as alternating groups, such as "one first slot, two second slots, one first slot, two second slots, ..." arranged sequentially along the circumference. In this case, the first slot or second slot of each group is arranged continuously, and the groups are arranged alternately, and it is not limited to the above implementation method.

[0068] Based on the design that the number of reinforcing ribs 320 is less than the number of slots, in some other embodiments of this disclosure (not shown), adhesive material 330 can also be provided at the slots (i.e., the second slots) where no reinforcing ribs 320 are provided. Through the above design, this disclosure utilizes the adhesive material 330 at the second slots to achieve bonding between the stator core 210 and the cylinder 310 in areas where no reinforcing ribs 320 are provided, further improving the bonding effect.

[0069] As mentioned above, the stator shield 300 utilizes the design of reinforcing ribs 320 to effectively reduce stress concentration in the stator shield 300. This ensures that the stress on the stator shield 300 during motor operation is much less than the yield strength of its material, which helps to improve the overall compressive strength of the stator shield and meet the requirements of high temperature and high pressure working environments.

[0070] like Figures 6 to 8As shown, in one embodiment of this disclosure, one axial end of the cylinder 310 is a first end 311, and a first support ring 350 is fitted around the outer periphery of the first end 311. The first support ring 350 can be installed after the stator shield 300 is installed into the stator assembly 200. Based on this, a reinforcing rib 320 is located in the area of ​​the cylinder 310 other than the first end 311, and one end of the reinforcing rib 320 forms a first shoulder 323, which abuts against the first support ring 350. Through the above design, this disclosure utilizes the reinforcing rib 320 to form the first shoulder 323, thereby achieving axial positioning of the first support ring 350, resulting in a simple and reliable structure. Accordingly, when the stator shield 300 is assembled with the outer shell 100, the opening of the first end 311 of the stator shield 300 is fitted around the outer periphery of the sealing ring of the shell and pressed against the sealing ring via the first support ring 350, thereby achieving a good sealing effect.

[0071] Based on the design of a first support ring 350 sleeved on the first end 311 of the cylinder 310, in one embodiment of this disclosure, the first support ring 350 can be made of metal materials, such as steel, aluminum, copper, magnesium alloy, etc.

[0072] like Figure 6 , Figure 9 and Figure 10 As shown, in one embodiment of this disclosure, the other end of the cylinder 310 in the axial direction is a second end 312. A groove structure 313 is provided on the outer periphery of the second end 312. A groove 314 is provided within the groove structure 313, and a second support ring 360 is embedded within the groove 314. The second support ring 360 can be embedded into the groove 314 through an integral injection molding process. Furthermore, a reinforcing rib 320 is located in the area of ​​the cylinder 310 other than the second end 312, and one end of the reinforcing rib 320 is connected to the groove structure 313. Accordingly, when the stator shield 300 is assembled with the outer shell 100, the opening of the second end 312 of the stator shield 300 is fitted onto the outer periphery of the sealing ring of the end cover and pressed against the sealing ring via the second support ring 360, thereby achieving a good sealing effect.

[0073] Based on the design of a second support ring 360 embedded in the second end 312 of the cylinder 310, in one embodiment of this disclosure, the material of the second support ring 360 can be a metal material, such as steel, aluminum, copper, magnesium alloy, etc.

[0074] like Figure 10As shown, based on the design of the groove structure 313 provided at the second end 312 of the cylinder 310, in one embodiment of this disclosure, the end of the groove structure 313 facing the first end 311 forms a second shoulder 315. The second shoulder 315 can be approximately a flange structure, and the second shoulder 315 abuts against the end of the coil frame 220 in the axial direction, thereby enabling the position of the stator shield 300 to be positioned in the axial direction.

[0075] like Figure 10 As shown, in one embodiment of this disclosure, the inner wall of the cylinder 310 at the cylinder opening (e.g., the cylinder opening at the first end 311 and the cylinder opening at the second end 312) may be provided with a guide slope 316, the guide slope 316 being inclined at an angle relative to the axial direction. θ The angle can be 20° to 45°, such as 20°, 25°, 30°, 35°, 45°, etc. Through the above design, this disclosure utilizes the guide slope 316 to provide a guiding function during the installation of components such as the rotor assembly 400 into the stator shield 300, thereby improving assembly accuracy and reducing assembly difficulty.

[0076] It should be noted that the motors shown in the accompanying drawings and described in this specification are merely a few examples among many motors capable of employing the principles of this disclosure. It should be clearly understood that the principles of this disclosure are by no means limited to any details or components of the motors shown in the accompanying drawings or described in this specification.

[0077] Based on the above detailed description of several exemplary embodiments of the motor proposed in this disclosure, an exemplary embodiment of the vehicle proposed in this disclosure will be described below.

[0078] In one embodiment of this disclosure, the vehicle proposed in this disclosure includes the motor proposed in this disclosure and described in detail in the above embodiments.

[0079] In one embodiment of this disclosure, the vehicle proposed in this disclosure can be a hybrid vehicle, a non-hybrid vehicle, an electric vehicle, a fuel cell vehicle, or other types of vehicles. The vehicle can be an autonomous vehicle, a semi-autonomous vehicle, or a non-autonomous vehicle.

[0080] Figure 11 This is a block diagram illustrating a vehicle 600 according to an exemplary embodiment. (Refer to...) Figure 11 The vehicle 600 may include various subsystems, such as an infotainment system 610, a perception system 620, a decision control system 630, a drive system 640, and a computing platform 650. The vehicle 600 may also include more or fewer subsystems, and each subsystem may include multiple components. Furthermore, each subsystem and each component of the vehicle 600 can be interconnected via wired or wireless means.

[0081] In some embodiments, the infotainment system 610 may include a communication system, an entertainment system, and a navigation system, etc.

[0082] The perception system 620 may include several sensors for sensing information about the environment surrounding the vehicle 600. For example, the perception system 620 may include a global positioning system (which may be GPS, BeiDou, or other positioning systems), an inertial measurement unit (IMU), lidar, millimeter-wave radar, ultrasonic radar, and a camera device.

[0083] The decision control system 630 may include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.

[0084] The drive system 640 may include components that provide powered motion to the vehicle 600. In one embodiment, the drive system 640 may include an engine, an energy source, a transmission system, and wheels. The engine may be one or a combination of internal combustion engines, electric motors, and compressed air engines. The engine is capable of converting energy provided by the energy source into mechanical energy.

[0085] Some or all of the functions of vehicle 600 are controlled by computing platform 650. Computing platform 650 may include at least one processor 651 and memory 652, processor 651 can execute instructions 653 stored in memory 652.

[0086] Processor 651 can be any conventional processor, such as a commercially available CPU. Processors may also include graphics processing units (GPUs), field-programmable gate arrays (FPGAs), systems-on-chips (SoCs), application-specific integrated circuits (ASICs), or combinations thereof.

[0087] The memory 652 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0088] In addition to instruction 653, memory 652 can also store data, such as road maps, route information, vehicle position, direction, speed, and other data. The data stored in memory 652 can be used by computing platform 650.

[0089] It should be noted that the vehicles shown in the accompanying drawings and described in this specification are merely a few examples among many vehicles capable of employing the principles of this disclosure. It should be clearly understood that the principles of this disclosure are by no means limited to any detail or component of the vehicles shown in the accompanying drawings or described in this specification.

[0090] In summary, the motor disclosed herein includes a stator assembly 200, a stator shield 300, and a rotor assembly 400. The stator assembly 200 includes multiple stator cores 210, which are arranged circumferentially and surround to form a receiving space. The ends of the stator cores 210 near the receiving space have pole shoes 211 at their circumferential ends, and a slot is formed between the two opposite pole shoes 211 of two adjacent stator cores 210. The stator shield 300 is disposed within the receiving space and has a cylindrical structure. A reinforcing rib 320 protrudes from the outer periphery of the cylindrical body 310 of the stator shield 300. The reinforcing rib 320 is at least partially located at the slot, and a gap G exists between the side of the reinforcing rib 320 and the end face 2111 of the pole shoe 211. An adhesive material 330 is disposed within the gap G. The rotor assembly 400 is disposed within the stator shield 300. Through the above design, this disclosure arranges the reinforcing ribs 320 of the stator shield 300 and the pole shoes 211 on both sides in a gap manner, thereby avoiding wear problems caused by direct contact between the reinforcing ribs 320 and the pole shoes 211, reducing contact stress, and extending the service life of components. Based on this, this disclosure provides adhesive material 330 at the gap G between the reinforcing ribs 320 and the pole shoes 211, using adhesive material 330 to bond the stator shield 300 to the stator core 210, thus providing support and strengthening, preventing deformation of the stator shield 300, and helping to maintain the shape of the stator shield 300. Furthermore, because the stator shield 300 can maintain a relatively stable structure within the motor, it can provide a good sealing effect, better achieving dry and wet cavity isolation of the motor, and ensuring uniform flow of fluid within the wet cavity.

[0091] Furthermore, the term “exemplary” is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as “exemplary” is not necessarily to be construed as advantageous compared to other aspects or designs. Rather, the use of the term “exemplary” is intended to present the concept in a concrete manner. As used herein, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless otherwise specified or clear from the context, “X applies A or B” is intended to mean any of the natural inclusive arrangements. That is, “X applies A or B” satisfies any of the foregoing instances if X applies A; X applies B; or both X applies A and B. Additionally, unless otherwise specified or clear from the context to refer to the singular form, the articles “a” and “an” as used in this application and the appended claims are generally understood to mean “one or more.”

[0092] Similarly, although this disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art upon reading and understanding this specification and the accompanying drawings. This disclosure includes all such modifications and variations and is limited only by the scope of the claims. In particular, with respect to the various functions performed by the components described above (e.g., elements, resources, etc.), unless otherwise indicated, the terminology used to describe such components is intended to correspond to any component (functionally equivalent) that performs the specific function of the described component, even if structurally not equivalent to the disclosed structure. Furthermore, although specific features of this disclosure may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations, as may be desired and advantageous to any given or particular application. Moreover, with regard to the terms “comprising,” “owning,” “having,” “having,” or variations thereof as used in the detailed description or claims, such terms are intended to be inclusive in a manner similar to the term “including.”

[0093] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0094] It should be understood that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., used in the embodiments of this disclosure should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms herein according to the specific circumstances.

[0095] Although terms such as “first” and “second” may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited to these terms. Rather, these terms are used only to distinguish one component, part, region, layer, or section from another. Therefore, without departing from the teachings of the examples described herein, the first component, part, region, layer, or section mentioned in the examples may also be referred to as the second component, part, region, layer, or section. Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first” or “second” may explicitly or implicitly include at least one of that feature. In the description herein, “a plurality” means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0096] It should be understood that spatial relative terms, such as “above,” “upper,” “below,” and “lower,” are used herein to describe the relationship between one element and another shown in the figures. In addition to the orientation depicted in the figures, these spatial relative terms are also intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as “above” or “upper” relative to another element would be “below” or “lower” relative to that other element. Thus, depending on the spatial orientation of the device, the term “above” encompasses both above and below orientations. Devices may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0097] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An electric motor, characterized in that, include: A stator assembly (200) includes a plurality of stator cores (210), the plurality of stator cores (210) are arranged circumferentially and surround to form a receiving space, the stator cores (210) have pole shoes (211) at their two ends circumferentially near the receiving space, and a slot is formed between the two opposite pole shoes (211) of two adjacent stator cores (210); A stator shield (300) is disposed within the accommodating space and has a cylindrical structure; a reinforcing rib (320) protrudes from the outer periphery of the cylindrical body (310) of the stator shield (300); the reinforcing rib (320) is at least partially located at the slot, and a gap (G) exists between the side of the reinforcing rib (320) and the end face (2111) of the pole shoe (211), and an adhesive material (330) is disposed within the gap (G); and The rotor assembly (400) is disposed within the stator shield (300).

2. The motor according to claim 1, characterized in that, The stator core (210) is provided with a coil frame (220) for winding a coil (230); the coil frame (220) is provided with an inner limiting wall (221) at one end near the stator shield (300); wherein the adhesive material (330) fills the gap (G) and the space between the inner limiting wall (221) and the pole shoe (211).

3. The motor according to claim 2, characterized in that, An opening (222) is formed between the two opposing inner limiting walls (221) of the coil frame (220) provided on the two adjacent stator cores (210), and the adhesive material (330) and the adhesive material filling the winding cavity of the coil frame (220) are connected to each other at the opening (222) to form an integral structure.

4. The motor according to claim 1, characterized in that, The adhesive material (330) is made of epoxy resin potting compound.

5. The motor according to claim 1, characterized in that, The pole shoe (211) has an outer side (2112) facing away from the stator shield (300), and the reinforcing rib (320) is staggered from the outer side (2112) of the pole shoe (211) so that the reinforcing rib (320) and the outer side (2112) of the pole shoe (211) do not overlap in the radial direction.

6. The motor according to claim 1, characterized in that, The distance between the reinforcing rib (320) and the pole shoes (211) on both sides is equal.

7. The motor according to claim 1, characterized in that, The cross-sectional profile of the reinforcing rib (320) includes a main arc segment (321) and two transition arc segments (322); the transition arc segments (322) are concave arc shapes, and the two transition arc segments (322) are respectively connected between the two ends of the main arc segment (321) and the outer surface of the cylinder (310).

8. The motor according to claim 7, characterized in that, The center of the corresponding circle of the main arc segment (321) falls within the range between the outer surface and the inner surface of the cylinder (310).

9. The motor according to claim 7, characterized in that, The first radius (R1) of the corresponding circle of the main arc segment (321) is 0.5mm~10mm.

10. The motor according to claim 7, characterized in that, The ratio of the first radius (R1) of the corresponding circle of the main arc segment (321) to the second radius (R2) of the corresponding circle of the transition arc segment (322) is 2 to 3.

11. The motor according to claim 7, characterized in that, The connection points between the main arc segment (321) and the two transition arc segments (322) are the first connection point and the second connection point, respectively. The connection points between the two transition arc segments (322) and the outer surface of the cylinder (310) are the third connection point and the fourth connection point, respectively. The ratio of the first distance (W1) between the first connection point and the second connection point to the second distance (W2) between the third connection point and the fourth connection point is greater than or equal to 1 / 2 and less than 1.

12. The motor according to claim 11, characterized in that, The third distance (W3) between the end faces (2111) of the two pole shoes (211) is greater than the first distance (W1) between the first connection point and the second connection point, and less than or equal to the second distance (W2) between the third connection point and the fourth connection point.

13. The motor according to claim 7, characterized in that, The connection point between the transition arc segment (322) and the outer surface of the cylinder (310) is located on the extension line of the end face (2111) of the pole shoe (211).

14. The motor according to claim 1, characterized in that, The cross-sectional profile of the reinforcing rib (320) includes an arc segment (340), the two ends of which are respectively connected to the outer surface of the cylinder (310); the connection point between the arc segment (340) and the outer surface of the cylinder (310) is located on the extension line of the end face (2111) of the pole shoe (211), and the extension line extends tangentially along the arc segment (340) at the connection point.

15. The motor according to claim 1, characterized in that, The cross-section of the reinforcing rib (320) is rectangular, triangular, circular, or elliptical.

16. The motor according to claim 1, characterized in that, Along the axial direction, the two ends of the reinforcing rib (320) extend beyond the two ends of the stator core (210).

17. The motor according to claim 1, characterized in that, The stator shield (300) is provided with a plurality of reinforcing ribs (320), the number of reinforcing ribs (320) being equal to the number of slots, and the plurality of reinforcing ribs (320) being arranged in a one-to-one correspondence with the plurality of slots.

18. The motor according to claim 1, characterized in that, The number of reinforcing ribs (320) is less than the number of slots. The slot with the reinforcing ribs (320) is the first slot, and the slot without the reinforcing ribs (320) is the second slot. Adhesive material (330) is provided at the second slot. The first slot and the second slot are arranged alternately.

19. The motor according to claim 1, characterized in that, The cylinder (310) has a guide slope (316) on its inner wall at the opening, and the guide slope (316) is inclined at an angle relative to the axial direction. θ The angle is 20° to 45°.

20. A vehicle, characterized in that, The vehicle includes the motor as described in any one of claims 1 to 19.

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