CN218301054U - Motor, electric power steering system and vehicle - Google Patents
Motor, electric power steering system and vehicle Download PDFInfo
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- CN218301054U CN218301054U CN202221657609.2U CN202221657609U CN218301054U CN 218301054 U CN218301054 U CN 218301054U CN 202221657609 U CN202221657609 U CN 202221657609U CN 218301054 U CN218301054 U CN 218301054U
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Abstract
The utility model provides a motor, electric power steering system and vehicle, wherein, the motor includes: a housing; a rotor having a rotating shaft disposed along a central axis; the stator is arranged in the shell and is arranged opposite to the rotor in the radial direction; a bus bar; the stator includes: a stator core connected to the housing; the stator framework is connected with the stator iron core, and the bus bar is connected with the stator framework; and the stator winding is wound on the stator framework, the radial distance between the part of the stator framework extending out of the first end of the stator core and the shell is D1, the radial distance between the part of the stator framework extending out of the second end of the stator core and the shell is D2, and D2 is more than D1 and is not less than 1.5mm. On the basis of reducing the radial distance between the stator winding and the shell as much as possible, the radial distance D1 between the stator winding and the shell is set to be more than or equal to 1.5mm, so that the radial distance between the stator winding and the shell can be shortened under the condition of reducing the radial distance between the stator winding and the shell.
Description
Technical Field
The utility model belongs to the technical field of electrical equipment, particularly, relate to a motor, electric power steering system and vehicle.
Background
In a vehicle, since a motor has a large size, when an installation space is limited, great inconvenience is brought to disassembly, assembly and maintenance of the motor, and therefore, how to reduce the volume of the motor becomes an urgent problem to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art or the correlation technique.
In view of this, the first aspect provides a motor, include: a housing; a rotor having a rotating shaft disposed along a central axis; a stator disposed in the housing, the stator being disposed radially opposite to the rotor; a bus bar; the stator includes: a stator core connected to the housing; the stator framework is connected with the stator iron core, and the bus bar is connected with the stator framework; the stator winding is wound on the stator framework, and the stator framework extends out of the first end of the stator core and the second end of the stator core along the axial direction of the motor; the radial distance between the part of the stator framework extending out of the first end of the stator core and the shell is D1, the radial distance between the part of the stator framework extending out of the second end of the stator core and the shell is D2, and D2 is more than D1 and is more than or equal to 1.5mm.
The utility model provides a motor, stator winding are around establishing on stator framework, and stator framework stretches out stator framework's axial both ends. The busbar is installed on the stator skeleton, and specifically, the busbar includes base and terminal, and the pedestal mounting is connected with the stator winding electricity on the stator skeleton, terminal. The terminals are also electrically connected with a controller of the electric machine, thereby achieving electrical connection between the controller, the terminals and the stator windings.
The partial stator skeleton that stretches out stator core first end is towards the diapire of casing, and the partial stator skeleton that stretches out stator core second end is towards the roof of casing, and wherein, the partial stator winding towards the roof of casing is connected with the busbar. The radial distance between the stator framework extending out of the first end of the stator core and the shell is D1, D1 is larger than or equal to 1.5mm, and the stator core needs to ensure the electrical safety distance between the stator winding and the stator framework in the power-on process, so that the shell is prevented from being broken down. On the basis of reducing stator skeleton and the radial interval of casing as far as possible, set up radial distance D1 of stator skeleton and casing and be greater than or equal to 1.5mm, thereby can be under the condition of reducing stator skeleton and the radial interval of casing, shorten the radial distance of stator skeleton and casing, because stator winding is around establishing on stator skeleton, when the distance of stator skeleton and casing is short, the distance of stator winding and casing is also short, thereby can reduce the radial length of motor, further reduce the volume of motor, be favorable to realizing the miniaturization of motor.
Stretch out the radial interval of partial stator skeleton of stator core second end and casing and be D2, D2 > D1, in order to assemble stator core to the casing in, can set up the great guide structure of internal diameter at the opening part of casing to can lead stator core to the casing in, so set up D2 > D1 and can improve the assembly convenience of motor.
In addition, according to the utility model provides an among the above-mentioned technical scheme motor can also have following additional technical characteristics:
in the above technical solution, the housing includes: a housing and an end cap connected; the thickness of the shell is D3, the minimum thickness of the end cap is D4, D3= D4.
In this technical scheme, the thickness of shell is the same with the minimum thickness of end cover, not only can guarantee the castability of shell and end cover, and convenient processing can also guarantee that the structural strength of shell and end cover is the same, and the shell of motor is constituteed with the end cover to the shell for the difficult emergence of the shell of motor damages, is favorable to promoting the structural stability of motor, reduces the spoilage.
In any of the above technical solutions, D3 and D4 satisfy, D3= D4 ≤ 3.5mm.
In the technical scheme, the thickness D3 of the shell and the thickness D4 of the end cover meet, and D3= D4 is not more than 3.5mm. The maximum thickness of the shell and the end cover is 3.5mm, and the thickness of the shell and the end cover is reduced as much as possible on the basis of ensuring the structural strength requirement of the shell and the end cover by limiting the range, so that the material saving can be facilitated. Moreover, the thickness of the shell and the end cover is reduced, the length of the motor in the axial direction can be reduced, the size of the motor is further reduced, and the motor is miniaturized.
In any of the above technical solutions, the housing is provided with a first bearing chamber, and the end cover is provided with a second bearing chamber; the motor further includes: the first bearing is positioned in the first bearing chamber, the first end of the rotating shaft penetrates through the first bearing, and the second end of the rotating shaft penetrates through the second bearing; the distance between the first bearing chamber and the rotor is D5, the distance between the second bearing chamber and the rotor is D6, and D6 is larger than D5.
In this embodiment, when the rotor is fitted into the housing, the distance between the first bearing chamber and the rotor is kept constant, and the distance between the first bearing chamber and the rotor is D5. In the process of assembling the end cover to the housing, in order to avoid interference between the rotor and the second bearing chamber in the rotation process, the distance between the second bearing chamber and the rotor may be set according to the distance between the first bearing seat and the rotor, however, when the end cover is assembled to the housing, due to the existence of assembly errors, it may be difficult to ensure that the distance between the second bearing chamber and the rotor is equal to the distance between the first bearing chamber and the rotor, and the situation that the second bearing chamber and the rotor interfere with each other is easy to occur. Therefore, in order to ensure the rotation stability of the rotor, the distance between the second bearing chamber and the rotor is limited to be larger than the distance between the first bearing chamber and the rotor, so that the influence on the operation of the rotor due to installation errors can be avoided, and the stability of the motor in operation can be improved.
The shell is provided with a first bearing chamber in a machining and forming mode, the first bearing is installed in the first bearing chamber, the first bearing and the first bearing chamber are in interference fit connection, and the first bearing can be firmly installed in the first bearing chamber. The first end of pivot passes first bearing, and first bearing plays the bearing effect to the first end of pivot. The first bearing comprises: the inner ring, the rolling element and the outer ring are in contact with the inner wall of the first bearing chamber, and the outer ring is relatively fixed with the inner wall of the first bearing chamber, so that the outer ring cannot rotate. The inner ring is connected with the rotating shaft, and when the rotating shaft rotates, the inner ring rotates along with the rotating shaft. A second bearing chamber is formed in the end cover in a machining mode, the second bearing is installed in the second bearing chamber, the second bearing and the second bearing chamber are in interference fit connection, and the second bearing can be firmly installed in the second bearing chamber. The second end of the rotating shaft penetrates through the second bearing, and the second bearing plays a bearing role in the second end of the rotating shaft. The second bearing includes: the outer ring is in contact with the inner wall of the second bearing chamber, and the outer ring is relatively fixed with the inner wall of the second bearing chamber, so that the outer ring cannot rotate. The inner ring is connected with the rotating shaft, and when the rotating shaft rotates, the inner ring rotates along with the rotating shaft.
The length of the first bearing is less than the depth of the first bearing chamber so that the first bearing does not protrude out of the first bearing chamber. The length of the second bearing is less than the depth of the second bearing chamber so that the second bearing does not protrude out of the second bearing chamber. Although the inner ring of the first bearing and the inner ring of the second bearing rotate together with the rotating shaft, the first bearing and the second bearing are both positioned in the bearing chamber, and the bearing chamber plays a role in protecting the bearings, so that other parts in the motor cannot interfere with the first bearing and the second bearing, and the other parts in the motor, the first bearing and the second bearing are prevented from colliding and being damaged. When the motor is assembled, other parts in the motor do not need to be arranged with a larger gap along the axial direction and the bearing, so that the axial length of the motor can be reduced, the size of the motor can be reduced, and the motor is favorably miniaturized.
Moreover, because the depth of the first bearing chamber is greater than the length of the first bearing, the first bearing chamber can support the whole outer ring of the first bearing, and the first bearing is not easy to shake. In a similar way, because the degree of depth of second bearing room is greater than the length of first bearing, consequently the second bearing room can play the supporting role to the whole outer lane of second bearing, and the difficult emergence of second bearing is rocked. Under the condition that first bearing and second bearing are in stable assembly state, first bearing and second bearing carry out the outrigger to the pivot, are favorable to promoting the performance of motor.
In any of the above technical schemes, D5 and D6 satisfy that D6 is more than D5 and is more than or equal to 2mm.
In this technical scheme, the interval of second bearing chamber and rotor is greater than first bearing chamber and rotor interval to avoid second bearing chamber to produce the interference to the rotation of rotor. On the basis, the distance D5 between the first bearing chamber and the rotor is limited to be more than or equal to 2mm, and the rotation stability of the rotor is ensured.
In the running process of the motor, the rotor inevitably has a small amount of deviation due to vibration or stress of the motor, in order to ensure the mechanical safety distance requirement of the first bearing chamber, the second bearing chamber and the rotor, the distance D5 between the first bearing chamber and the rotor is limited to be more than or equal to 2mm, and the rotor cannot interfere with the first bearing chamber in the range. Moreover, because the distance between the second bearing chamber and the rotor is larger than the distance between the first bearing chamber and the rotor, the distance D6 between the second bearing chamber and the rotor is inevitably larger than 2mm, so that the rotor cannot interfere with the second bearing chamber, and the running stability of the motor is ensured.
In addition, by limiting the mechanical safety distance, on the basis of ensuring the stable rotation of the rotor, the distance between the first bearing chamber and the rotor can be reduced as much as possible, the distance between the second bearing chamber and the rotor is reduced, the length of the motor in the axial direction is reduced, the size of the motor is further reduced, and the motor is favorably miniaturized.
In any of the above solutions, the bus bar includes a base; the axial interval of stator skeleton and shell is D7, and the axial interval of base and end cover is D8, and D8 > D7.
In this technical scheme, the busbar includes base and terminal, and the terminal is connected in the base, has the clearance between base and the end cover, has seted up the mounting hole on the end cover, and the terminal can stretch out the end cover after passing the mounting hole.
Be located the outside partial stator skeleton that has of stator core first end, be located the outside base that has partial stator skeleton and busbar of stator core second end, consequently, under the circumstances of motor circular telegram, compare in the partial stator skeleton that stretches out the first end of stator core, the base and stretch out the partial stator that stator core second end and puncture the end cover around the skeleton more easily. In order to guarantee the requirement of the electrical appliance safety distance of the motor, the axial distance between the base and the end cover is limited to be larger than the axial distance between the stator framework and the shell, the safety distance between the stator winding and the bottom wall of the shell is kept under the condition that the motor is electrified, the safety distance between the base of the bus bar and the end cover is kept, and the running safety of the motor is guaranteed.
In any of the above technical schemes, D7 and D8 satisfy, D8 is larger than D7 and is larger than or equal to 1.5mm.
In the technical scheme, in order to further ensure that the stator core keeps a safe distance from the bottom wall of the shell and the base of the bus bar keeps a safe distance from the end cover, the axial distance D7 between the stator framework and the shell is limited to be more than or equal to 1.5mm, and the shell is not easily punctured by the stator winding in the range. Because the axial distance between the base and the end cover is greater than the axial distance between the stator winding and the shell, under the condition that the axial distance D7 between the stator framework and the shell is greater than or equal to 1.5mm, the axial distance between the base and the end cover is inevitably greater than 1.5mm, the bus bar and the stator winding are not easy to break down the end cover, and the operation safety of the motor is ensured.
Moreover, under the condition of ensuring the requirement of the electrical appliance safety distance of the motor, the axial distance between the stator winding and the shell and the axial distance between the base and the end cover can be reduced as much as possible, the length of the motor in the axial direction is reduced, the size of the motor is further reduced, and the motor is favorably miniaturized.
In any of the above technical solutions, the stator and the housing are in interference fit.
In this technical scheme, the stator is connected through interference fit's mode with the shell, can improve the dress stability of stator and shell, avoids the relative shell of stator to take place to rock.
In a second aspect, the present invention provides an electric power steering system, including the motor according to any one of the above possible technical solutions, therefore the present invention provides an electric power steering system having all the beneficial effects of the motor provided in the above technical solutions.
Among them, the electric power steering system is an electric power steering system that directly relies on a motor to provide an assist torque power, and the EPS system has many advantages compared to the conventional hydraulic power steering system HPS. The EPS mainly comprises a torque sensor, a vehicle speed sensor, a motor, a speed reducing mechanism, an electronic control unit and the like.
Third aspect, the utility model provides a vehicle, include the electric power steering system as in above-mentioned technical scheme, consequently the utility model provides a vehicle has the whole beneficial effect of the electric power steering system who provides among the above-mentioned technical scheme.
The vehicle can be a traditional fuel vehicle or a new energy vehicle. The new energy automobile comprises a pure electric automobile, a range-extended electric automobile, a hybrid electric automobile, a fuel cell electric automobile, a hydrogen engine automobile and the like.
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 above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a schematic structural diagram of an electric machine in an embodiment of the present invention;
fig. 2 shows a schematic structural diagram of an electric power steering system according to an embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 and fig. 2 is:
100 casing, 110 casing, 120 end cover, 130 rotor, 140 stator, 141 stator core, 142 stator skeleton, 150 busbar, 151 terminal, 152 base, 160 first bearing chamber, 170 second bearing chamber, 180 first bearing, 190 second bearing, 200 rotating shaft, 300 motor, 400 electric power steering system, 411 steering wheel, 412 steering shaft, 413 universal joint, 414 rotating shaft, 415 rack and pinion mechanism, 416 rack shaft, 417 steering wheel, 421 steering torque sensor, 422 control unit, 423 speed reducing mechanism.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
An electric machine, an electric power steering system, and a vehicle provided in accordance with some embodiments of the present invention are described below with reference to fig. 1 and 2.
As shown in fig. 1, in some embodiments of the present invention, there is provided an electric machine comprising: a housing 100, a rotor 130, a stator 140, and a bus bar. The rotor 130 has a rotating shaft 200 disposed along the center axis, the stator 140 is provided in the casing 100, and the stator 140 is disposed to face the rotor 130 in the radial direction. The stator 140 includes: stator core 141, stator skeleton 142 and stator winding. Stator core 141 connects in casing 100, and stator skeleton 142 is connected with stator core 141, and busbar 150 is connected with stator skeleton 142, and stator winding is around locating on stator skeleton 142, along the axial of motor, and stator skeleton 142 stretches out stator core 141's first end and stator core 141's second end. The radial distance between the part of the stator frame 142 extending out of the first end of the stator core 141 and the casing 100 is D1, the radial distance between the part of the stator frame 142 extending out of the second end of the stator core 141 and the casing 100 is D2, and D2 > D1 is more than or equal to 1.5mm.
In the motor provided by this embodiment, the stator winding is wound on the stator frame 142, and after the assembly of the stator winding and the stator frame 142 is completed, the stator winding extends out of the two axial ends of the stator frame 142. The bus bar 150 is mounted on the stator frame 142, and specifically, the bus bar 150 includes a base 152 and a terminal 151, the base 152 is mounted on the stator frame 142, and the terminal 151 is electrically connected to the stator winding. The terminals 151 are also electrically connected to the controller of the motor, thereby achieving electrical connection between the controller, the terminals 151 and the stator windings.
The portion of the stator winding extending beyond the first end of stator core 141 faces the bottom wall of housing 110, and the portion of the stator winding extending beyond the second end of stator core 141 faces end cover 120, wherein the portion of the stator winding facing end cover 120 is connected to bus bar 150. The radial distance between the stator winding extending out of the first end of the stator core 141 and the housing 110 is D1, D1 is greater than or equal to 1.5mm, and the stator core 141 needs to ensure the electrical safety distance between the stator winding and the housing 110 during the power-on process, so as to prevent the housing 110 from being broken down. On the basis of reducing the radial distance between the stator winding and the shell 110 as much as possible, the radial distance D1 between the stator winding and the shell 110 is set to be more than or equal to 1.5mm, so that the radial distance between the stator winding and the shell 110 can be shortened under the condition of reducing the radial distance between the stator winding and the shell 110, the radial length of the motor can be reduced, the size of the motor is further reduced, and the motor is beneficial to realizing miniaturization.
The radial distance between the partial stator winding extending out of the second end of the stator core 141 and the shell 110 is D2, D2 > D1, so that the stator core 141 can be conveniently assembled into the shell 110, a guide structure with a larger inner diameter can be arranged at the opening of the shell 110, the stator core 141 can be guided into the shell 110, and therefore D2 > D1 can be arranged to improve the assembly convenience of the motor.
As shown in fig. 1, in any of the above embodiments, the housing 100 includes: the coupled housing 110 and end cap 120; the thickness of the shell 110 is D3 and the minimum thickness of the end cap 120 is D4, D3= D4.
In this embodiment, the thickness of the shell 110 is the same as the minimum thickness of the end cover 120, which not only can ensure the castability of the shell 110 and the end cover 120 and facilitate the processing, but also can ensure the structural strength of the shell 110 and the end cover 120 to be the same, and the shell 110 and the end cover 120 form the shell of the motor, so that the shell of the motor is not easy to be damaged, thereby being beneficial to improving the structural stability of the motor and reducing the damage rate.
As shown in FIG. 1, in any of the above embodiments, D3 and D4 satisfy that D3= D4 ≦ 3.5mm.
In this embodiment, the thickness D3 of the housing 110 and the thickness D4 of the end cap 120 satisfy, D3= D4 ≦ 3.5mm. That is, the maximum thickness of the outer shell 110 and the end cap 120 is 3.5mm, and by limiting the above range, the thickness of the outer shell 110 and the end cap 120 can be reduced as much as possible while the structural strength requirements of the outer shell 110 and the end cap 120 are ensured, thereby being beneficial to saving materials. In addition, by reducing the thickness of the shell 110 and the end cover 120, the length of the motor along the axial direction can be reduced, the size of the motor is further reduced, and the motor is miniaturized.
In any of the above embodiments, as shown in fig. 1, the housing 110 is provided with a first bearing chamber 160, and the end cap 120 is provided with a second bearing chamber 170; the motor further includes: a first bearing 180 and a second bearing 190, the first bearing 180 being located in the first bearing chamber 160, a first end of the rotation shaft 200 passing through the first bearing 180, and a second end of the rotation shaft 200 passing through the second bearing 190; the first bearing chamber 160 is spaced apart from the rotor 130 by a distance D5, and the second bearing chamber 170 is spaced apart from the rotor 130 by a distance D6, D6 > D5.
In this embodiment, in the case where the rotor 130 is assembled into the housing 110, the distance between the first bearing chamber 160 and the rotor 130 is maintained constant, and the distance between the first bearing chamber 160 and the rotor 130 is D5. In order to avoid interference of the rotor 130 with the second bearing chamber 170 during rotation in the process of assembling the end cover 120 to the housing 110, the distance between the second bearing chamber 170 and the rotor 130 may be set according to the distance between the first bearing 180 and the rotor 130, but when assembling the end cover 120 to the housing 110, it may be difficult to ensure that the distance between the second bearing chamber 170 and the rotor 130 is equal to the distance between the first bearing chamber 160 and the rotor 130 due to the existence of assembly errors, and the occurrence of mutual interference of the second bearing chamber 170 and the rotor 130 is likely to occur. Therefore, in order to ensure the rotational stability of the rotor 130, the distance between the second bearing chamber 170 and the rotor 130 is defined to be greater than the distance between the first bearing chamber 160 and the rotor 130, so that the influence on the operation of the rotor 130 due to installation errors can be avoided, and the stability of the motor during operation can be improved.
The first bearing chamber 160 is formed on the housing 110, the first bearing 180 is installed in the first bearing chamber 160, and the first bearing 180 and the first bearing chamber 160 are connected in an interference fit manner, so that the first bearing 180 can be tightly installed in the first bearing chamber 160. The first end of the rotating shaft 200 passes through the first bearing 180, and the first bearing 180 plays a bearing role for the first end of the rotating shaft 200. The first bearing 180 includes: the inner race is in contact with the inner wall of the first bearing chamber 160, and the outer race is relatively fixed to the inner wall of the first bearing chamber 160 so that the outer race does not rotate. The inner ring is connected to the rotation shaft 200, and rotates together with the rotation shaft 200 when the rotation shaft 200 rotates. A second bearing chamber 170 is formed on the end cap 120, the second bearing 190 is installed in the second bearing chamber 170, and the second bearing 190 and the second bearing chamber 170 are connected in an interference fit manner, so that the second bearing 190 can be tightly installed in the second bearing chamber 170. The second end of the rotating shaft 200 passes through the second bearing 190, and the second bearing 190 plays a bearing role for the second end of the rotating shaft 200. The second bearing 190 includes: the inner race is in contact with the inner wall of the second bearing chamber 170, and the outer race is relatively fixed to the inner wall of the second bearing chamber 170, so that the outer race does not rotate. The inner ring is connected to the rotation shaft 200, and rotates together with the rotation shaft 200 when the rotation shaft 200 rotates.
The length of the first bearing 180 is less than the depth of the first bearing chamber 160 so that the first bearing 180 does not protrude out of the first bearing chamber 160. The length of the second bearing 190 is less than the depth of the second bearing chamber 170 so that the second bearing 190 does not protrude out of the second bearing chamber 170. Although the inner ring of the first bearing 180 and the inner ring of the second bearing 190 rotate together with the rotating shaft 200, the first bearing 180 and the second bearing 190 are both located in the bearing chamber, and the bearing chamber protects the bearings, so that other parts in the motor cannot interfere with the first bearing 180 and the second bearing 190, and the first bearing 180 and the second bearing 190 are prevented from colliding with each other and being damaged. When the motor is assembled, other parts in the motor do not need to be arranged with a larger gap along the axial direction and the bearing, so that the axial length of the motor can be reduced, the size of the motor can be reduced, and the motor is favorably miniaturized.
Furthermore, since the depth of the first bearing chamber 160 is greater than the length of the first bearing 180, the first bearing chamber 160 can support the entire outer ring of the first bearing 180, and the first bearing 180 is less likely to rattle. Similarly, since the depth of the second bearing chamber 170 is greater than the length of the first bearing 180, the second bearing chamber 170 can support the entire outer ring of the second bearing 190, and the second bearing 190 is not easily shaken. Under the condition that first bearing 180 and second bearing 190 are in stable assembly state, first bearing 180 and second bearing 190 stabilize support to pivot 200, are favorable to promoting the performance of motor.
In one possible application, the first end of the shaft 200 extends out of the housing 110, and the second end of the shaft 200 does not extend out of the end cap 120, further reducing the axial length of the motor.
As shown in FIG. 1, in any of the above embodiments, D5 and D6 satisfy that D6 > D5 ≧ 2mm.
In this embodiment, the second bearing chamber 170 is spaced farther from the rotor 130 than the first bearing chamber 160 is spaced from the rotor 130, thereby preventing the second bearing chamber 170 from interfering with the rotation of the rotor 130. On the basis, the distance D5 between the first bearing chamber 160 and the rotor 130 is more than or equal to 2mm, so that the rotation stability of the rotor 130 is ensured.
In the operation process of the motor, the rotor 130 inevitably has a small amount of deflection due to vibration or stress, and in order to ensure the mechanical safety distance requirement of the first bearing chamber 160 and the second bearing chamber 170 with the rotor 130, the distance D5 between the first bearing chamber 160 and the rotor 130 is limited to be more than or equal to 2mm, and in this range, the rotor 130 does not interfere with the first bearing chamber 160. Moreover, since the distance between the second bearing chamber 170 and the rotor 130 is greater than the distance between the first bearing chamber 160 and the rotor 130, the distance D6 between the second bearing chamber 170 and the rotor 130 is inevitably greater than 2mm, so that the rotor 130 does not interfere with the second bearing chamber 170, and the operation stability of the motor is ensured.
In addition, by limiting the mechanical safety distance, on the basis of ensuring the stable rotation of the rotor 130, the distance between the first bearing chamber 160 and the rotor 130 can be reduced as much as possible, the distance between the second bearing chamber 170 and the rotor 130 can be reduced, the length of the motor in the axial direction can be reduced, the size of the motor can be further reduced, and the motor can be miniaturized.
As shown in fig. 1, in any of the above embodiments, the bus bar 150 includes a base 152; the axial distance between the stator frame 142 and the housing 110 is D7, the axial distance between the base 152 and the end cover 120 is D8, and D8 is greater than D7.
In this embodiment, the bus bar 150 includes a base 152 and a terminal 151, the terminal 151 is connected to the base 152, a gap is formed between the base 152 and the end cover 120, a mounting hole is opened on the end cover 120, and the terminal 151 can pass through the mounting hole and then extend out of the end cover 120.
As shown in FIG. 1, in any of the above embodiments, D7 and D8 are satisfied, and D8 > D7 ≧ 1.5mm.
In this embodiment, in order to further ensure that the stator core 141 maintains a safe distance from the bottom wall of the housing 110, and the base 152 of the bus bar 150 maintains a safe distance from the end cover 120, the axial distance D7 between the stator frame 142 and the housing 110 is defined to be greater than or equal to 1.5mm, and within this range, the stator winding is not easy to break down the housing 110. Because the axial distance between the base 152 and the end cover 120 is greater than the axial distance between the stator frame 142 and the housing 110, when the axial distance D7 between the stator winding and the housing 110 is greater than or equal to 1.5mm, the axial distance between the base 152 and the end cover 120 is inevitably greater than 1.5mm, and the bus bar 150 and the stator winding are not easy to break down the end cover 120, thereby ensuring the operation safety of the motor.
Moreover, under the condition of ensuring the requirement of the electrical appliance safety distance of the motor, the axial distance between the stator framework 142 and the shell 110 and the axial distance between the base 152 and the end cover 120 can be reduced as much as possible, the length of the motor along the axial direction is reduced, the size of the motor is further reduced, and the motor is favorably miniaturized.
In any of the embodiments described above, the stator 140 and the housing 110 are an interference fit.
In this embodiment, the stator 140 is connected to the housing 110 in an interference fit manner, so that the assembling stability of the stator 140 and the housing 110 can be improved, and the stator 140 is prevented from shaking relative to the housing.
As shown in fig. 2, the present embodiment provides an electric power steering system 400, which includes the motor 300 in any of the above possible embodiments, so that the electric power steering system 400 provided by the present embodiment has all the advantages of the motor 300 provided in the above embodiments.
Among them, the Electric Power Steering system 400 (abbreviated as EPS) is an Electric Power Steering system that directly relies on the motor 300 to provide auxiliary torque Power, and compared with the conventional HPS (Hydraulic Power Steering), the EPS system has a simple structure and flexible assembly, and can save energy and protect the environment, and most of modern vehicles are basically equipped with EPS systems.
The electric power steering system 400 includes a variety of implementations. One of the various realizable modes will be described in detail below. In one embodiment, the EPS system includes an electric power steering system and an assist torque mechanism that generates an assist torque. The assist torque assists a steering torque of the electric power steering system generated by a driver operating a steering wheel. The burden of the operation of the driver is reduced by the assist torque.
Specifically, the electric power steering system 400 includes a steering wheel 411, a steering shaft 412, a universal joint 413, a rotary shaft 414, a rack-and-pinion mechanism 415, a rack shaft 416, left and right steered wheels 417, and the like.
The assist torque mechanism specifically includes a steering torque sensor 421, an electronic control unit 422 for an automobile, a motor, a speed reduction mechanism 423, and the like. Specifically, the steering torque sensor 421 detects the steering torque of the electric power steering system. The control unit 422 generates a drive signal based on the detection signal of the steering torque sensor 421. The motor generates an assist torque corresponding to the steering torque in accordance with the drive signal. The motor transmits the generated assist torque to the electric power steering system via the speed reduction mechanism 423.
This embodiment proposes a vehicle including an electric power steering system as in the above embodiments, and therefore the present invention provides a vehicle having all the advantageous effects of the electric power steering system as provided in the above embodiments.
The vehicle can be a traditional fuel vehicle or a new energy vehicle. The new energy automobile comprises a pure electric automobile, an extended range electric automobile, a hybrid electric automobile, a fuel cell electric automobile, a hydrogen engine automobile and the like.
In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are used broadly and should be construed to include, for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the description of the present specification, the terms "one embodiment," "some embodiments," "specific embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An electric machine, comprising:
a housing;
a rotor having a rotating shaft disposed along a central axis;
a stator provided in the housing, the stator being disposed to be radially opposed to the rotor;
a bus bar;
the stator includes:
a stator core connected to the housing;
the stator framework is connected with the stator iron core, and the bus bar is connected with the stator framework;
the stator winding is wound on the stator framework, and the stator framework extends out of a first end of the stator core and a second end of the stator core along the axial direction of the motor;
the radial distance between the stator framework and the shell of the part extending out of the first end of the stator core is D1, the radial distance between the stator framework and the shell of the part extending out of the second end of the stator core is D2, and D2 is more than D1 and is more than or equal to 1.5mm.
2. The electric machine of claim 1,
the housing includes: a housing and an end cap connected;
the thickness of the shell is D3, the minimum thickness of the end cover is D4, and D3= D4.
3. The electric machine of claim 2,
d3 and D4 satisfy, D3= D4 ≦ 3.5mm.
4. The electric machine of claim 2,
a first bearing chamber is arranged on the shell, and a second bearing chamber is arranged on the end cover;
the motor further includes: the first bearing is positioned in the first bearing chamber, a first end of the rotating shaft penetrates through the first bearing, and a second end of the rotating shaft penetrates through the second bearing;
the distance between the first bearing chamber and the rotor is D5, the distance between the second bearing chamber and the rotor is D6, and D6 is larger than D5.
5. The electric machine of claim 4,
d5 and D6 meet the requirement that D6 is more than D5 and is more than or equal to 2mm.
6. The electric machine of claim 2,
the bus bar includes a base;
the stator skeleton with the axial interval of shell is D7, the base with the axial interval of end cover is D8, and D8 > D7.
7. The electric machine of claim 6,
d7 and D8 meet the requirement that D8 is larger than D7 and is larger than or equal to 1.5mm.
8. The electric machine according to any of claims 2 to 6,
the stator and the housing are in interference fit.
9. An electric power steering system characterized by comprising the motor according to any one of claims 1 to 8.
10. A vehicle characterized by comprising the electric power steering system according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221657609.2U CN218301054U (en) | 2022-06-30 | 2022-06-30 | Motor, electric power steering system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221657609.2U CN218301054U (en) | 2022-06-30 | 2022-06-30 | Motor, electric power steering system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218301054U true CN218301054U (en) | 2023-01-13 |
Family
ID=84789272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221657609.2U Active CN218301054U (en) | 2022-06-30 | 2022-06-30 | Motor, electric power steering system and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218301054U (en) |
-
2022
- 2022-06-30 CN CN202221657609.2U patent/CN218301054U/en active Active
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