CN214314758U - Stator core, stator, motor, electric power steering system and vehicle - Google Patents
Stator core, stator, motor, electric power steering system and vehicle Download PDFInfo
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- CN214314758U CN214314758U CN202120252580.9U CN202120252580U CN214314758U CN 214314758 U CN214314758 U CN 214314758U CN 202120252580 U CN202120252580 U CN 202120252580U CN 214314758 U CN214314758 U CN 214314758U
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Abstract
The utility model discloses a stator core and discloses a stator, a motor, an electric power steering system and a vehicle with the stator core, wherein the stator core comprises a plurality of iron core units which are annularly arranged, the iron core units comprise arc-shaped yoke parts and tooth parts, the circumferential two end surfaces of the yoke parts are respectively a first end surface and a second end surface, the first end surface is provided with a bulge, the second end surface is provided with a groove, and in two adjacent iron core units, the bulge of one iron core unit is connected with the groove of the other iron core unit in a clamping manner; the protrusion comprises a main body section and a guide section, the main body section is connected to the first end face, the guide section is connected to the main body section, and the guide section is used for guiding the protrusion to be clamped with the groove; on the cross section perpendicular to the axial direction of the stator core, the inner side face and the outer side face of the main body section along the radial direction of the stator core are perpendicular to the first end face. Through the guide effect of direction section, enable the connection structure between two adjacent iron core units more reliable and stable, improve the yields of product.
Description
Technical Field
The utility model relates to a motor field, in particular to stator core, stator, motor, electric power steering system and vehicle.
Background
The motor is widely applied in the field of automobiles, and the realization of functions such as driving, steering, braking and the like is closely related to the motor. The motor is used as an important part of an automobile, and a stator is required to stably and reliably operate when the motor works. In the stator, most stator core is through adopting the amalgamation formula structure at present, if its shape structural design is improper when each part of stator core splices each other, causes the production line production defective percentage to rise easily, and efficiency descends, improves the comprehensive cost.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a stator core can improve the yields of product.
The utility model discloses still provide a stator, motor, electric power steering system and vehicle with above-mentioned stator core.
According to the utility model discloses a stator core of first aspect embodiment, including a plurality of iron core units that are arranged annularly, the iron core unit includes arc yoke portion and tooth portion, the both ends face of circumference of yoke portion is first terminal surface and second terminal surface respectively, first terminal surface is provided with the arch, the second terminal surface is provided with the recess, in two adjacent iron core units, the arch of one of them iron core unit and the recess joint of another iron core unit; the tooth part is fixedly connected with the yoke part; the protrusion comprises a main body section and a guide section, the main body section is connected to the first end face, the guide section is connected to one end, far away from the first end face, of the main body section, and the guide section is used for guiding the protrusion to be clamped with the groove; on the axial cross section of stator core's perpendicular to, follow stator core's radial, the main part section has medial surface and lateral surface, the medial surface with the lateral surface all is perpendicular to first terminal surface.
According to the utility model discloses stator core has following beneficial effect at least: through the guide effect of direction section, enable protruding better and groove connection target in place to make the connection structure between two adjacent iron core units more reliable and more stable, and then make whole stator core's structure inseparabler, make the stator core's of producing structure more stable, improve the yields of product.
According to some embodiments of the invention, the stator core is a cylindrical stator core, and the outer circumference of the stator core is a circular cylindrical stator core.
According to some embodiments of the invention, on the cross section perpendicular to the axial direction of the stator core, the distance between the inner side surface and the outer side surface is W1, the main body section protrudes from the height of the first end surface is W2, wherein W1 < W2.
According to some embodiments of the present invention, in a cross section perpendicular to the axial direction of the stator core, a height of the main body section protruding from the first end surface is W2, and a difference between a radius of the outer circumferential surface and a radius of the inner circumferential surface of the yoke portion in a radial direction of the stator core is W3, where W2 < W3/2.
According to the utility model discloses a some embodiments at least one end of the circumference of yoke portion is followed stator core's radial, the outer peripheral face of yoke portion is provided with to stator core's the sunken welding groove of centre of a circle direction, adjacent two the iron core unit passes through welding groove welded fastening.
According to the utility model discloses a some embodiments, the both ends of the circumference of yoke portion all are provided with the welding groove, adjacent two the iron core unit the welding groove can amalgamation, two the bottom surface in welding groove flushes each other.
According to some embodiments of the present invention, on the cross section perpendicular to the axial direction of the stator core, a depth of the welding groove recessed to the direction of the center of the circle of the stator core is R1, and a difference between a radius of the outer circumferential surface of the yoke portion and a radius of the inner circumferential surface is W3 in a radial direction of the stator core, wherein 0.3mm < R1< (W3/4).
According to some embodiments of the invention, the protrusion and the groove all follow the axial direction of the stator core is followed the one end of the core unit extends to the other end.
According to some embodiments of the present invention, in a cross section perpendicular to an axial direction of the stator core, the protrusion and the groove are both axisymmetric and have a symmetry axis, the yoke portion has a center line in an arc shape, and a distance between an outer peripheral surface of the yoke portion and the center line is equal to a distance between an inner peripheral surface of the yoke portion and the center line in a radial direction of the stator core;
wherein the content of the first and second substances,
the symmetry axes of the protrusion and the groove are tangent to or intersect with the center line.
According to some embodiments of the utility model, the outer peripheral face of yoke portion is provided with the constant head tank, the constant head tank is used for supplying fixture embedding and right the iron core unit carries out the centre gripping.
According to some embodiments of the present invention, the tooth portion includes a tooth body and a shoe portion, the tooth body is connected between the shoe portion and the yoke portion, the tooth body is provided with a processing groove, and the processing groove is located the tooth body is close to one end of the shoe portion.
According to the utility model discloses a stator of second aspect embodiment, include the stator core of the first aspect embodiment of the utility model.
According to the utility model discloses stator has following beneficial effect at least: through the guide effect of direction section, enable protruding better and groove connection target in place to make the connection structure between two adjacent iron core units more reliable and more stable, and then make whole stator core's structure inseparabler, the stator core's that makes to produce structure is more stable, improves the yields of the product on the production line.
According to the utility model discloses a motor of third aspect embodiment, include the stator of the second aspect embodiment of the utility model.
According to the utility model discloses motor has following beneficial effect at least: through the guide effect of direction section, enable protruding better and groove connection target in place to make the connection structure between two adjacent iron core units more reliable and more stable, and then make whole stator core's structure inseparabler, the stator core's that makes to produce structure is more stable, improves the yields of the product on the production line.
According to the utility model discloses an electric power assisted steering system of fourth aspect embodiment, include the utility model discloses a motor of third aspect embodiment.
According to the utility model discloses electric power steering system has following beneficial effect at least: through the guide effect of direction section, enable protruding better and groove connection target in place to make the connection structure between two adjacent iron core units more reliable and more stable, and then make whole stator core's structure inseparabler, the stator core's that makes to produce structure is more stable, improves the yields of the product on the production line.
According to the utility model discloses a vehicle of fifth aspect embodiment, include the utility model discloses an electric power assisted steering system of fourth aspect embodiment.
According to the utility model discloses vehicle has following beneficial effect at least: through the guide effect of direction section, enable protruding better and groove connection target in place to make the connection structure between two adjacent iron core units more reliable and more stable, and then make whole stator core's structure inseparabler, the stator core's that makes to produce structure is more stable, improves the yields of the product on the production line.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention will be further described with reference to the following drawings and examples, in which:
fig. 1 is a schematic view of a stator core according to an embodiment of the present invention;
fig. 2 is a plan view of a stator core according to an embodiment of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is an enlarged view of section B of FIG. 2;
fig. 5 is a schematic view of an iron core unit according to an embodiment of the present invention;
fig. 6 is a schematic view of a core unit according to another embodiment of the present invention;
fig. 7 is an enlarged view of the portion C of fig. 5.
The stator core comprises a core unit 100, a yoke 110, a first end surface 111, a second end surface 112, a welding groove 113, a positioning groove 114, a center line 115, a symmetry axis 116, a characteristic line 117, a tooth part 120, a tooth body 121, a shoe part 122, a machining groove 123, a protrusion 130, a body section 131, an outer side surface 1311, a first rounded section 13111, an inner side surface 1312, a second rounded section 13121, a guide section 132, a groove 140 and a stator core 200.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
The motor of the embodiment of the present invention comprises a stator and a rotor (not shown in the figures), wherein the stator is composed of a stator core 200 and a stator winding (not shown in the figures), in the stator according to the embodiment of the present invention, referring to fig. 1 to 6, the stator core 200 includes a plurality of core units 100 arranged in a ring shape, each core unit 100 includes a yoke 110 and a tooth 120, each tooth 120 includes a tooth 121 and a shoe 122, the tooth 121 is connected between the shoe 122 and the yoke 110, the tooth 121 is located in a radial direction of the stator core 200, an inner circumferential surface of the shoe 122 and an outer circumferential surface of the yoke 110 are concentric arc surfaces, two circumferential end surfaces of the yoke 110 are a first end surface 111 and a second end surface 112, the first end surface 111 is provided with a protrusion 130, the second end surface 112 is provided with a groove 140, the protrusion 130 of one of the core units 100 is clamped with the groove 140 of the other core unit 100; tooth 120 is fixedly connected with yoke 110; the protrusion 130 comprises a main body section 131 and a guide section 132, the main body section 131 is connected to the first end surface 111, the guide section 132 is connected to one end of the main body section 131 far away from the first end surface 111, and the guide section 132 is used for guiding the protrusion 130 to be clamped with the groove 140; in a cross section of the stator core 200 perpendicular to the axial direction, the main body segment 131 has an inner side surface 1312 and an outer side surface 1311 in a radial direction of the stator core 200, and the inner side surface 1312 and the outer side surface 1311 are perpendicular to the first end surface 111.
It can be understood that, referring to fig. 1 and fig. 2, the whole stator core 200 is formed by splicing a plurality of relatively independent core units 100, referring to fig. 3, through the cooperation of the protrusion 130 and the groove 140, so as to splice and form the stator core 200 between a plurality of core units 100, wherein, in the process of processing, when the protrusion 130 and the groove 140 between two adjacent core units 100 are clamped, through the guiding effect of the guiding section 132, the protrusion 130 and the groove 140 can be better clamped in place, so that the connection structure between two adjacent core units 100 is more stable and reliable, further, the structure of the whole stator core 200 is more compact, the structure of the produced stator core 200 is more stable, and the yield of products on the production line is improved. It should be noted that the guide section 132 refers to a structure in which, during the process of splicing two adjacent core units 100 to each other, the guide section 132 contacts the groove 140, and the guide protrusion 130 and the groove 140 move relatively to the positions where they are snapped into each other to achieve the snapping of the protrusion 130 and the groove 140. Wherein, the end of the guide segment 132 far away from the main body segment 131 is a first end, the end of the guide segment 132 connected with the main body segment 131 is a second end, and on the cross section perpendicular to the axial direction of the stator core 200, along the radial direction of the stator core 200, the width of the guide segment 132 is gradually increased from the first end to the second end.
It should be mentioned that, after the protrusion 130 and the groove 140 are connected, a mutual constraint state is formed between the protrusion 130 and the groove 140, so as to improve the stability of the whole connection structure, so that the core unit 100 cannot move in the radial direction of the stator core 200, and ensure the structural stability of the stator core 200. The structure of stator core 200 tends to be more stable, and the performance of the motor that enables to produce is more stable, improves the wholeness ability of motor, when using in assembling the motor to other systems, can improve the performance and the stability of this system to reduce comprehensive cost.
Referring to fig. 7, it should be mentioned that, the protrusion 130 and the yoke 110 are integrally formed, in order to increase the strength of the joint between the protrusion 130 and the yoke 110 in actual processing, a fillet or a chamfer is provided between the body segment 131 of the protrusion 130 and the first end surface 111 of the yoke 110, so as to increase the structural strength of the joint between the protrusion 130 and the yoke 110, and in the above-mentioned cross section perpendicular to the axial direction of the stator core 200, along the radial direction of the stator core 200, the inner side surface 1312 and the outer side surface 1311 of the body segment 131 are perpendicular to the first end surface 111, which means along the radial direction of the stator core 200, the extension lines of the inner side surface 1312 and the outer side surface 1311 of the body segment 131 are perpendicular to the first end surface 111.
When rounding is provided between the main body segment 131 and the first end surface 111, on a cross section perpendicular to the axial direction of the stator core 200, along the radial direction of the stator core 200, a first rounding segment 13111 is connected between the inner side surface 1312 of the main body segment 131 and the first end surface 111, a second rounding segment 13121 is connected between the outer side surface 1311 of the main body segment 131 and the first end surface 111, a connection point of the inner side surface 1312 and the first rounding segment 13111 is a position where the inner side surface 1312 and the first rounding segment 13111 are tangent, and a connection point of the outer side surface 1311 and the second rounding segment 13121 is a position where the outer side surface 1311 and the second rounding segment 13121 are tangent, it should be mentioned that specific dimensions of the first rounding segment 13111 and the second rounding segment 13121 need to be actually adjusted according to actual machining requirements.
When a chamfer angle is provided between the main body segment 131 and the first end surface 111 (not shown in the drawings), on a cross section perpendicular to the axial direction of the stator core 200, in the radial direction of the stator core 200, a first chamfer angle segment is connected between the inner side surface 1312 of the main body segment 131 and the first end surface 111, a second chamfer angle segment is connected between the outer side surface 1311 of the main body segment 131 and the first end surface 111, the connection position of the inner side surface 1312 and the first chamfer angle segment is a position where the inner side surface 1312 and the first chamfer angle segment form an angle, and the connection position of the outer side surface 1311 and the second chamfer angle segment is a position where the outer side surface 1311 and the second chamfer angle segment form an angle, wherein specific sizes of the first chamfer angle segment and the second chamfer angle segment need to be actually adjusted according to actual processing requirements.
It will be appreciated that, in some embodiments, referring to fig. 5, the outer circumferential surface of the guide segment 132 is arc-shaped in a cross-section perpendicular to the axial direction of the stator core 200. When the protrusion 130 contacts with the groove 140 and is clamped, the arc surface of the guide section 132 contacts with the groove 140, and the groove 140 is guided to slide relative to the protrusion 130, so that the groove 140 can be sleeved on the protrusion 130 in a more fitting manner, and the problem that the protrusion 130 cannot be completely embedded in the groove 140, which causes the two adjacent iron core units 100 to be connected insecure is avoided.
It should be mentioned that, because the guiding section 132 is an arc, when the edge of the groove 140 contacts with the guiding section 132, the edge of the groove 140 slides along the arc, and the groove 140 is sleeved with the protrusion 130, and the shape of the protrusion 130 matches with that of the groove 140, therefore, the bottom surface of the groove 140 is an arc matching with the guiding section 132, and after the protrusion 130 is inserted into the groove 140, the arc at the bottom of the groove 140 and the arc of the guiding section 132 are matched with each other, so that the protrusion 130 is entirely inserted into the groove 140, and the stability of the structure is ensured.
It should be mentioned that, referring to fig. 6, in some embodiments, in the cross section perpendicular to the axial direction of the stator core 200, the outer circumferential surface of the guiding section 132 is tapered, specifically, when the tapered surface of the guiding section contacts with the edge of the groove 140, the guiding function is also performed on the core unit 100 where the groove 140 is located, so that the core unit moves along the extending direction of the tapered surface, the groove 140 is sleeved on the protrusion 130, and finally, the protrusion 130 and the groove 140 are in snap fit, so that the plurality of core units 100 are assembled to form the annular stator core 200.
Referring to fig. 5, 6 and 7, it should be mentioned that, in the above-mentioned embodiment, in the cross section perpendicular to the axial direction of the stator core 200, the distance between the inner side surface 1312 and the outer side surface 1311 of the main body segment 131 is W1, the height at which the main body segment 131 protrudes from the first end surface 111 is W2, and the difference between the radius of the outer circumference of the yoke 110 in the radial direction of the stator core 200 and the radius of the inner circumference of the yoke 110 in the radial direction of the stator core 200 is W3, where W1 < W2 < W3/2. Therefore, the size of the main body segment 131 is not too small or too large, the material cost is reduced, and the stability of clamping is ensured. Specifically, the rounded corners (such as the first rounded corner segment 13111 and the second rounded corner segment 13121 shown in fig. 7) or the rounded corners (not shown in the drawings) provided between the body segment 131 of the protrusion 130 and the first end surface 111 of the yoke 110 should also be included in the height W2 of the body segment 131 protruding from the first end surface 111.
It can be understood that the body segment 131 is formed by extending from the end surface of the yoke 110, therefore, the connection between the body segment 131 and the yoke 110 can be considered as a starting point of the extension of the body segment 131, and the connection between the body segment 131 and the guide segment 132 is an end point of the extension of the body segment 131, and the above-mentioned W2 should be a straight distance from the starting point to the end point of the body segment 131 along the edge of the body segment 131.
It is understood that, referring to fig. 5, in a cross section perpendicular to the axial direction of the stator core 200, the core unit 100 has a characteristic line 117, the characteristic line 117 is a line segment coinciding with any one radius of the stator core 200, an intersection point of the characteristic line 117 with the outer periphery of the yoke portion 110 is E, and an intersection point of the characteristic line 117 with the inner periphery of the yoke portion 110 is D, and then W3 is the length of the D-E segment on the characteristic line 117.
It is understood that, referring to fig. 1, the protrusions 130 and the grooves 140 are extended at both ends of the yoke portion 110 in the axial direction of the stator core 200. The protrusion 130 is extended from the first end surface 111 of the yoke 110, and the groove 140 is extended from the second end surface 112 of the yoke 110, specifically, the protrusion 130 and the groove 140 are extended from the top to the bottom of the yoke 110 along the axial direction of the stator core 200, so that the core unit 100 can be conveniently processed by using a plurality of stator laminations in a laminating manner in the processing process.
Specifically, in actual processing, the core unit 100 is formed by laminating a plurality of stator laminations, and in order to reduce the processing cost, the smaller the number of the stator laminations, the better the specification of the stator laminations, therefore, in the above embodiment, the protrusion 130 and the groove 140 are respectively located at two ends of the yoke portion 110 in the circumferential direction, and the protrusion 130 and the groove 140 both extend from the top end of the stator core 200 to the bottom end of the stator core 200 along the axial direction of the stator core 200, only one specification shape of the stator laminations for laminating is needed, when processing, the plurality of stator laminations are stacked and pressed to form the core unit 100, and the plurality of core units 100 are spliced to form the stator core 200, and only the stator laminations of the same specification need to be produced in the processing, so that the stator core 200 can be produced, the production efficiency is greatly improved, and the overall production cost is reduced.
It can be understood that, referring to fig. 5 and 6, in a cross section perpendicular to the axial direction of the stator core 200, the protrusions 130 and the grooves 140 are each axisymmetric in shape and have a symmetry axis 116, the yoke 110 has a center line 115 in an arc shape, and a distance between an outer periphery of the yoke 110 and the center line 115 is equal to a distance between the inner periphery of the yoke 110 and the center line 115 in a radial direction of the stator core 200; wherein the axis of symmetry 116 of either the protrusion 130 or the groove 140 is tangent to or intersects the centerline 115. Because the protrusion 130 and the groove 140 both have the symmetry axis 116, in the cross section of the stator core 200, the groove 140 and the protrusion 130 are both in a symmetrical shape, and when the protrusion 130 and the groove 140 in the symmetrical shape are in snap fit, the stability of mutual constraint of the protrusion 130 and the groove 140 can be improved, further, the symmetry axis 116 of the protrusion 130 and the groove 140 is tangent to the center line 115 of the yoke 110, and the protrusion 130 and the groove 140 are both located at the center of the yoke 110, so that the split tightness of two adjacent split core units 100 can be improved, and further, the structural stability of the whole stator core 200 is improved. In other embodiments, the axes of symmetry 116 of the protrusions 130 and the grooves 140 may intersect the center line 115 of the yoke 110, and this structure also achieves the effect of splicing two adjacent core units 100.
Specifically, on the cross section perpendicular to the axial direction of the stator core 200, the symmetrical protrusion 130 and the groove 140 are divided along the symmetry axis 116 of the protrusion 130 or the groove 140, the two parts at the two sides of the symmetry axis 116 of the protrusion 130 or the groove 140 are mirror images, when the protrusion 130 is embedded in the groove 140 to realize the clamping connection between the protrusion 130 and the groove 140, the stress of the two parts divided along the symmetry axis 116 tends to be consistent, so that it can be ensured that the overall load of the protrusion 130 and the groove 140 tends to be uniform in the using process, the structure of the mutual connection between two adjacent core units 100 is ensured to be more stable, and the mutual separation between two core units 100 is avoided.
Further, it can be understood that the structure of connection is more stable, enables the performance of the motor in specific work to be more stable, improves the yield of the whole product, and in addition, the more stable structure also can improve the structural stability of the stator of the motor in the use process, reduces the friction between the iron core units 100, thereby reducing the vibration and the noise of the motor in the use process.
In actual processing, the plurality of core units 100 are transported by a clamping mechanism (not shown in the drawings), and the smooth outer surface is not favorable for clamping and transporting the core units 100 in production processing, so that it can be understood that, referring to fig. 5 and 6, the outer circumferential surface of the yoke portion 110 is provided with positioning grooves 114 for clamping in the radial direction of the stator core 200. Constant head tank 114 provides the position of centre gripping for fixture, and fixture imbeds in the constant head tank 114 and carries out the centre gripping to iron core unit 100 and makes and go on the amalgamation between a plurality of iron core units 100, avoids fixture and yoke portion 110's outer peripheral face to take place the relative slip, guarantees at the in-process of centre gripping, and iron core unit 100 can not drop from fixture, improves the convenience of processing, improves the production efficiency of the production line of stator and motor simultaneously.
In order to avoid the overflow of the solder, it can be understood that, referring to fig. 5 and 6, at least one end of the yoke portion 110 in the circumferential direction is provided with a welding groove 113 recessed toward the center of the stator core 200 along the radial direction of the stator core 200 on the outer circumferential surface of the yoke portion 110, and two adjacent core units 100 are welded and fixed by the welding groove 113, in the stator core 200 after the core units 100 are spliced together. Specifically, in the processing process, the plurality of core units 100 are firstly spliced together to form the annular stator core 200 through the matching connection between the protrusion 130 and the groove 140, and after the splicing is completed, the welding is performed in the welding groove 113 to fix the adjacent two core units 100, wherein the solder for welding is left in the welding groove 113, wherein the height of the welding seam should not exceed the depth of the welding groove 113, so as to avoid the problem of solder overflow.
If the depth of the welding groove 113 is too deep, the strength of the stator laminations can be easily affected, so that the plurality of stator laminations are deformed during the lamination process, and the strength of the spliced portion of the processed stator core 200 is weakened, while if the depth of the welding groove 113 is too shallow, flash is easily caused, and in order to ensure the strength of the spliced portion of the stator core 200 and avoid the solder flash, it can be understood that, on the cross section perpendicular to the axial direction of the stator core 200, the depth of the depression of the welding groove 113 towards the center of the stator core 200 is R1, the difference between the radius of the outer periphery of the yoke portion 110 along the radial direction of the stator core 200 and the radius of the inner periphery of the yoke portion 110 along the radial direction of the stator core 200 is W3, wherein 0.3mm < R1< (W3/4). In this embodiment, the depth R1 of the welding groove 113 should be smaller than the distance between the outer circumferential surface of the yoke 110 and the center line 115 of the yoke 110 so as not to exceed the thickness 1/4 of the yoke 110 in the radial direction, thereby securing the structural strength of the spliced portion of the stator core 200 after welding, and at the same time, the depth R1 of the welding groove 113 is made larger than 0.3mm, thereby securing a sufficient space for the welding groove 113 to contain the solder and preventing the solder from overflowing onto the outer circumferential surface of the welding groove 113.
It should be mentioned that, in some embodiments, the welding slot 113 is only disposed at one end of the yoke portion 110, and when a plurality of core units 100 are spliced, welding is performed in the welding slot 113 of each core unit 100, that is, two adjacent core units 100 may be fixedly connected to form the annular stator core 200.
It is understood that, referring to fig. 2 and 3, welding grooves 113 are provided at both outer sides of both ends of the yoke portion 110 in the circumferential direction, and the welding grooves 113 of the adjacent two core units 100 can be split such that the bottom surfaces of the two welding grooves 113 are flush with each other. Specifically, in same iron core unit 100, both ends are first welding groove and second welding groove respectively, and after two adjacent iron core units 100 splice, the first welding groove and the second welding groove of mutual amalgamation can form the great welding groove 113 in an area, and then can enlarge the space that is used for holding the solder, increase the solder that is used for the welding, improve stator core 200 splice part's intensity.
It should be noted that the positioning grooves 114 and the welding grooves 113 do not overlap, that is, the positioning grooves 114 are not provided at both ends of the yoke 110 in the circumferential direction.
It can be understood that the core unit 100 is formed by laminating a plurality of stator laminations, the stator laminations are of a sheet structure and have small strength, and when the stator laminations are processed, the arc-shaped edge between the tooth body 121 and the shoe portion 122 of the stator laminations is easy to deform and distort.
The utility model relates to a vehicle, electric power assisted steering system in the vehicle includes the motor of above embodiment. It should be noted that an Electric Power Steering (EPS) is a Power Steering system that directly relies on a motor to provide an assist torque, and compared with a conventional Hydraulic Power Steering (HPS), the EPS system has many advantages, such as reduced fuel consumption, enhanced Steering following, improved Steering return characteristics, improved Steering stability, variable Steering assist, simple system structure, small occupied space, and good assembly of a production line. The EPS system is mainly composed of a torque sensor, a vehicle speed sensor, a speed reduction mechanism, an electronic control unit, the motor of the embodiment, and the like. Referring to fig. 1 to 6, the motor of the present embodiment includes the stator of the above embodiment, and the stator includes the stator core 200 of the above embodiment.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (15)
1. The utility model provides a stator core which characterized in that, includes a plurality of iron core units that are the annular and arrange, the iron core unit includes:
a tooth portion;
the arc-shaped yoke part is fixedly connected with the tooth part, two circumferential end faces of the yoke part are respectively a first end face and a second end face, the first end face is provided with a protrusion, the second end face is provided with a groove, and the protrusion of one of the two adjacent iron core units is clamped with the groove of the other iron core unit;
the protrusion comprises a main body section and a guide section, the main body section is connected to the first end face, the guide section is connected to one end, far away from the first end face, of the main body section, and the guide section is used for guiding the protrusion to be clamped with the groove;
on the axial cross section of stator core's perpendicular to, follow stator core's radial, the main part section has medial surface and lateral surface, the medial surface with the lateral surface all is perpendicular to first terminal surface.
2. The stator core according to claim 1, wherein the outer circumferential surface of the guide section is arc-shaped or tapered in a cross section perpendicular to the axial direction of the stator core.
3. The stator core according to claim 1, wherein in a cross section of the stator core perpendicular to the axial direction, a distance between the inner side surface and the outer side surface is W1, and a height of the main body segment protruding from the first end surface is W2, wherein W1 < W2.
4. The stator core according to claim 1, wherein in a cross section of the stator core perpendicular to the axial direction, the height at which the body segments protrude from the first end surface is W2, and a difference between a radius of an outer circumferential surface and a radius of an inner circumferential surface of the yoke portion in a radial direction of the stator core is W3, wherein W2 < W3/2.
5. The stator core according to claim 1, wherein at least one end of the yoke portion in the circumferential direction is provided with a welding groove recessed in the direction of the center of the stator core in the radial direction of the stator core, and two adjacent core units are welded and fixed by the welding groove.
6. The stator core according to claim 5, wherein the welding grooves are provided at both ends of the yoke portion in the circumferential direction, the welding grooves of adjacent two of the core units can be split, and bottom surfaces of the two welding grooves are flush with each other.
7. The stator core according to claim 5, wherein the weld groove is recessed toward a center of the stator core by a depth R1 in a cross section perpendicular to an axial direction of the stator core, and a difference between a radius of an outer circumferential surface and a radius of an inner circumferential surface of the yoke portion in a radial direction of the stator core is W3, wherein 0.3mm < R1< (W3/4).
8. The stator core according to claim 1, wherein the protrusion and the groove each extend from one end to the other end of the core unit in an axial direction of the stator core.
9. The stator core according to claim 8, wherein, in a cross section of the stator core perpendicular to an axial direction, the protrusion and the groove are each axisymmetric in shape and have a symmetry axis, the yoke portion has a center line in an arc shape, and a distance between an outer circumferential surface of the yoke portion and the center line is equal to a distance between an inner circumferential surface of the yoke portion and the center line in a radial direction of the stator core;
wherein the content of the first and second substances,
the symmetry axes of the protrusion and the groove are tangent to or intersect with the center line.
10. The stator core according to claim 1, wherein a positioning groove for a clamping mechanism to be inserted and clamp the core unit is provided on an outer circumferential surface of the yoke portion in a radial direction of the stator core.
11. The stator core according to claim 1, wherein the tooth portion includes a tooth body and a shoe portion, the tooth body is connected between the shoe portion and the yoke portion, and the tooth body is provided with a machined groove at an end of the tooth body near the shoe portion.
12. A stator comprising the stator core according to any one of claims 1 to 11.
13. An electrical machine comprising a stator according to claim 12.
14. An electric power steering system characterized by comprising the motor of claim 13.
15. A vehicle characterized by comprising the electric power steering system according to claim 14.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120252580.9U CN214314758U (en) | 2021-01-27 | 2021-01-27 | Stator core, stator, motor, electric power steering system and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120252580.9U CN214314758U (en) | 2021-01-27 | 2021-01-27 | Stator core, stator, motor, electric power steering system and vehicle |
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| CN214314758U true CN214314758U (en) | 2021-09-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113872348A (en) * | 2021-10-14 | 2021-12-31 | 广东美芝制冷设备有限公司 | Stator structure, motor structure, compressor structure and refrigeration plant |
| CN114069909A (en) * | 2021-12-08 | 2022-02-18 | 安徽美芝精密制造有限公司 | Stator, motor, compressor and electrical equipment |
-
2021
- 2021-01-27 CN CN202120252580.9U patent/CN214314758U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113872348A (en) * | 2021-10-14 | 2021-12-31 | 广东美芝制冷设备有限公司 | Stator structure, motor structure, compressor structure and refrigeration plant |
| CN113872348B (en) * | 2021-10-14 | 2023-11-17 | 广东美芝制冷设备有限公司 | Stator structure, motor structure, compressor structure and refrigeration equipment |
| CN114069909A (en) * | 2021-12-08 | 2022-02-18 | 安徽美芝精密制造有限公司 | Stator, motor, compressor and electrical equipment |
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