CN214314828U - Motor casing, motor, electric power steering system and vehicle - Google Patents

Abstract

The utility model discloses a motor housing, including a motor, an end cap, a controller, and a cover plate, motor housing, the inside of casing is formed with the cavity, the casing is provided with uncovered along axial one end, the casing still is provided with the first location portion that is used for circumference location motor housing, first location portion sets up in the chamber wall of cavity, during the assembly, set up uncovered up of casing, first location portion and the assembly of stretching into uncovered first location worker, thereby carry out the location of circumference to motor housing, prevent motor housing from rocking too big range in circumference, conveniently pack the stator into motor housing's cavity, because first location is located the cavity of casing, need not to occupy the outer wall space of casing, thereby the outer wall that has reduced motor housing occupies external space, make things convenient for the installation of motor.

Description

Motor casing, motor, electric power steering system and vehicle

Technical Field

The utility model relates to the technical field of electric machines, in particular to motor housing, motor, electric power steering system and vehicle.

Background

The conventional automobile power-assisted steering system usually comprises an electric power-assisted steering system and a hydraulic power-assisted steering system, wherein the electric power-assisted steering system adopts a motor to directly provide steering power, so that a power-assisted steering oil pump, a hose, hydraulic oil, a conveyor belt and a belt pulley arranged on an engine, which are required by the hydraulic power-assisted steering system, are omitted, energy is saved, the environment is protected, and the electric power-assisted steering system is widely applied. The motor comprises a shell and a stator, and when the motor is assembled, the shell is circumferentially positioned by a positioning tool, and then the stator is assembled into the shell. At present, a hanging lug is usually arranged on the outer wall of a shell, a hanging hole is formed in the hanging lug, and a positioning tool is inserted into the hanging hole through a positioning pin and the like to realize circumferential positioning of the shell. However, the hanging lugs protrude out of the outer wall of the casing to occupy a large space, so that the motor and other components have high requirements on the space during assembly, and the motor is not easy to mount.

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 motor housing that outer wall occupation space is little.

The utility model also provides a motor and have the electric power assisted steering system of above-mentioned motor that have above-mentioned motor housing.

The utility model discloses still provide a vehicle that has above-mentioned electric power steering system in addition.

According to the utility model discloses motor shell of first aspect embodiment, including the casing that is the tube-shape, inside is formed with the cavity that is used for installing the stator, the casing is provided with uncovered along axial one end, the casing still is provided with and is used for motor shell circumference location's first location portion, first location portion set up in the chamber wall of cavity.

According to the utility model discloses motor casing of first aspect embodiment has following beneficial effect at least: during the assembly, with the uncovered setting up of casing, first location portion with stretch into open first locator assembly and close, thereby carry out the location of circumference to motor housing, prevent that motor housing from rocking too big range in circumference, conveniently pack the stator into motor housing's cavity, because first location is located the cavity of casing, need not to occupy the outer wall space of casing, thereby reduced motor housing's outer wall and to the occupation of exterior space, make things convenient for the installation of motor.

According to some embodiments of the present invention, the first positioning portion is configured as a positioning rib, the positioning rib protrudes from the cavity wall of the cavity and is located along the axial direction of the housing.

According to some embodiments of the utility model, the location muscle is provided with a plurality ofly, and is a plurality of the location muscle is followed the circumference interval distribution of casing.

According to some embodiments of the utility model, the casing includes first barrel, second barrel and transition shell section, first barrel with pass through between the second barrel the transition shell section is connected, the axial lead of first barrel with the axial lead of second barrel is parallel, the internal diameter of first barrel is greater than the internal diameter of second barrel, uncovered set up in first barrel deviates from the one end of transition shell section, the location muscle set up in first barrel with the junction and the orientation of transition shell section uncovered extension.

According to some embodiments of the utility model, the axial lead of first barrel with the axial lead place plane of second barrel is the axle center face, the location muscle is followed the both sides of the circumference of first barrel are first side and second side respectively, wherein, first side be the plane and with the axle center face is parallel or the coincidence.

According to some embodiments of the present invention, when the first side with the second side all with the axle center face is parallel, the first side with the distance of axle center face is a, the first side with the distance of second side is b, a with b satisfies the following relation: and a is 0.5 b.

According to some embodiments of the utility model, the casing is provided with the end plate along the axial other end, the end plate deviates from one side of cavity is provided with at least one and is used for motor housing circumference location's second location portion.

According to some embodiments of the utility model, second location portion is the locating hole, the locating hole is the blind hole.

According to the utility model discloses a some embodiments, the locating hole is the round hole, the round hole be provided with a plurality ofly and interval distribution in the end plate.

According to the utility model discloses a some embodiments, be perpendicular to on the axial plane of projection of second barrel, the projection of axle center plane forms first projection line, one of them the centre of a circle projection of locating hole forms first projection point, the projection of axle center line of second barrel forms second projection point, first projection point with the line of second projection point with the contained angle of first projection line is c, c satisfies following relation: c is between 0 and 90 degrees.

According to some embodiments of the utility model, the outer wall indent of casing is formed with the centre gripping position, the centre gripping position be located the outer wall of casing with the junction of end plate.

According to the utility model discloses motor of second aspect embodiment, including stator, electronic control unit and the utility model discloses the motor casing of first aspect embodiment, wherein, the stator set up in the cavity is kept away from open one end, electronic control unit set up in the cavity is close to open one end, uncovered by the lid closing cap.

According to the utility model discloses motor of second aspect embodiment has following beneficial effect at least: by adopting the motor shell, the occupied space of the motor is reduced, and the motor is more convenient to install.

According to the utility model discloses electric power assisted steering system of third aspect embodiment, include the utility model discloses the motor of second aspect embodiment.

According to the utility model discloses electric power assisted steering system of third aspect embodiment has following beneficial effect at least: by adopting the motor, the convenience for mounting the electric power steering system is improved.

According to the utility model discloses vehicle of fourth aspect embodiment, include the utility model discloses electric power steering system of third aspect embodiment.

According to the utility model discloses vehicle of fourth aspect embodiment has following beneficial effect at least: by adopting the electric power steering system, the convenience of vehicle installation is improved.

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

Fig. 1 is a perspective view of a motor housing according to an embodiment of the present invention;

fig. 2 is a perspective view of the motor casing according to the embodiment of the present invention in another direction;

fig. 3 is a cross-sectional view of a motor housing according to an embodiment of the present invention;

FIG. 4 is an enlarged view of FIG. 3 at A;

fig. 5 is a top view of a motor housing according to an embodiment of the present invention;

fig. 6 is a top view of a motor housing according to another embodiment of the present invention;

FIG. 7 is an enlarged view at B in FIG. 6;

fig. 8 is a top view of a motor housing according to yet another embodiment of the present invention;

fig. 9 is a top view of a motor housing according to yet another embodiment of the present invention;

fig. 10 is a top view of a motor housing according to yet another embodiment of the present invention;

fig. 11 is a bottom view of a motor housing according to an embodiment of the present invention;

fig. 12 is a schematic diagram of circumferential positioning of a motor casing according to an embodiment of the present invention.

Reference numerals:

the structure comprises a shell 100, a first cylinder 110, an opening 111, a first positioning part 112, a first side surface 113, a second side surface 114, a second cylinder 120, a chamber 121, an end plate 122, a second positioning part 123, a through hole 124, a leading-in end 125, a clamping position 126, a transition shell section 130 and a shaft center surface 140;

a first positioning tool 200 and a clamping groove 210;

a second positioning tool 300 and a positioning pin 310.

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 otherwise clear and definite limitations, words such as setting, installing, connecting, assembling, matching, 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 the present invention by combining the specific contents of the technical solutions.

Referring to fig. 1 to 3, the motor housing according to the embodiment of the first aspect of the present invention includes a housing 100, the housing 100 is in a cylindrical shape, a cavity 121 is formed inside the housing 100, the cavity 121 is used for installing components such as a stator, the housing 100 is provided with an opening 111 along one axial end, and the stator is installed in the cavity 121 through the opening 111 during assembly. The housing 100 is further provided with a first positioning portion 112, and the first positioning portion 112 is disposed on the wall of the chamber 121. It can be understood that the first positioning portion 112 is located at an end of the chamber 121 close to the opening 111, and the stator and the like are installed at an end of the chamber 121 far from the opening 111, so as to reduce the influence of the first positioning portion 112 on the installation of the stator. The first positioning portion 112 is used for cooperating with the first positioning tool 200 to circumferentially position the motor casing, specifically, the first positioning portion 112 may be a positioning rib, the first positioning tool 200 is provided with a positioning groove, and the positioning rib cooperates with the positioning groove to circumferentially position the motor casing; or the first positioning portion 112 is a protruding block, the protruding block is provided with a positioning hole, the first positioning tool 200 is provided with a bolt, and the protruding block is matched with the bolt through the positioning hole to realize the circumferential positioning of the motor casing; or the projection is provided with a positioning groove, the first positioning tool 200 is provided with a clamping block, and the projection is matched with the clamping block through the positioning groove to realize the circumferential positioning of the motor shell; of course, the first positioning portion 112 may also be other positioning structures, which are not listed here.

Referring to fig. 12, when the stator is assembled to chamber 121 of motor housing, open 111 with casing 100 sets up, first location portion 112 cooperates with the first location frock 200 that stretches into open 111, thereby carry out the location of circumference to motor housing, prevent that motor housing from rocking too big range in circumference, then can fix motor housing centre gripping through clamping component, first location frock 200 moves away from motor housing's open 111 department, conveniently pack the stator into motor housing's chamber 121 through open 111 in, because first location portion 112 is located casing 100's chamber 121, need not to occupy casing 100's outer wall space, thereby the outer wall that has reduced motor housing occupies to exterior space, make things convenient for the installation of motor.

Referring to fig. 1, it can be understood that the first positioning portion 112 is a positioning rib, the positioning rib protrudes from the cavity wall of the cavity 121 and extends along the axial direction of the housing 100, the positioning rib is shaped like a long strip, and the area of the fitting surface of the positioning rib and the first positioning tool 200 is larger when the positioning rib is engaged with each other, which is beneficial to improving the engaging strength between the positioning rib and the first positioning tool 200. Specifically, first location frock 200 is provided with location muscle complex draw-in groove 210, during the location, and first location frock 200 removes towards motor housing's uncovered 111 for thereby draw-in groove 210 cup joints the circumference activity of restriction motor housing on the location muscle, realizes motor housing circumference's location. It can be understood that the slot 210 is provided with an introduction port, and the positioning rib can be more smoothly clamped into the slot 210 through the introduction port, so that the circumferential positioning of the motor casing is smoother.

Referring to fig. 9, one positioning rib is provided, and the positioning rib may be provided at any angle in the circumferential direction of the inner wall of the housing 100 according to specific needs. It is understood that, referring to fig. 10, the positioning rib may also be provided in plurality, and a plurality of positioning ribs are distributed on the inner wall of the casing 100 along the circumferential direction of the casing 100. Through setting up as above to can increase motor housing and first location frock 200's joint intensity on the one hand, on the other hand reduces the stress intensity of single location muscle, avoids certain location muscle fracture and influence the first location of motor housing circumference among the positioning process, improves the reliability of the first location of motor housing circumference. Specifically, the location muscle is provided with threely, and three location muscle is located the same cross section of casing 100, and wherein two location muscle symmetric distribution are in the both sides of the location muscle placed in the middle to make things convenient for first location frock and three location muscle cooperation to carry out the location of circumference to motor housing.

Referring to fig. 1 to 3, it can be understood that the casing 100 includes a first cylinder 110, a second cylinder 120 and a transition shell section 130, the first cylinder 110 and the second cylinder 120 are connected by the transition shell section 130, an axial line of the first cylinder 110 is parallel to an axial line of the second cylinder 120, that is, the first cylinder 110 and the second cylinder 120 are connected by the transition shell section 130 along an axial direction in a staggered manner. The internal diameter of first barrel 110 is greater than the internal diameter of second barrel 120, and the internal diameter of transition shell section 130 is by the one end that is close to first barrel 110 towards the one end that is close to second barrel 120 reduces gradually, and uncovered 111 is located the tip that first barrel 110 deviates from transition shell section 130, and the location muscle sets up in the junction of first barrel 110 and transition shell section 130 and extends towards uncovered 111. Casing 100 is through being provided with first barrel 110 and second barrel 120, and the internal diameter of first barrel 110 is greater than the internal diameter of second barrel 120, it is more convenient to make to pack into the stator from the uncovered 111 that is located the one end of first barrel 110, be convenient for simultaneously first location frock 200 or other parts stretch into in the cavity 121 through uncovered 111, first barrel 110 and second barrel 120 are connected along axial dislocation through the transition shell section in addition, make the motor casing can dodge the ascending part of corresponding direction when the installation, improve the convenience of installation.

Referring to fig. 5 to 8, it can be understood that the cross section of the positioning rib is substantially square, two sides of the positioning rib along the circumferential direction of the first cylinder 110 are respectively a first side surface 113 and a second side surface 114, a plane where the axial line of the first cylinder 110 and the axial line of the second cylinder 120 are located is an axial plane 140, the first side surface 113 is a plane and is parallel to or coincides with the axial plane 140, and the second side surface 114 may be a plane or a curved surface. For example, referring to fig. 5, when the left side surface of the positioning rib coincides with the axial center plane 140, the left side surface of the positioning rib is the first side surface 113, and the first side surface 113 coincides with the axial center plane 140; referring to fig. 8, or when the right side surface of the positioning rib coincides with the axial center plane 140, the right side surface of the positioning rib is the first side surface 113, and the first side surface 113 coincides with the axial center plane 140; referring to fig. 6 and 7, or when a side surface of the positioning rib along the circumferential direction of the housing 100 is parallel to the axial center plane 140, the side surface is the first side surface 113; or, when both the left side surface and the right side surface of the positioning rib are parallel to the axial center surface 140, either the left side surface or the right side surface may be the first side surface 113. Because the first side surface 113 is parallel to or coincident with the axial center plane 140, the position of the first side surface 113 is easier to position on the first cylinder 110, and therefore the first side surface 113 can be used as a reference for processing and positioning of the motor housing and a reference for assembling and positioning, thereby facilitating reduction of difficulty in processing and assembling of the motor housing, facilitating reduction of structural complexity of a processing tool and an assembling tool, and facilitating reduction of cost of the processing tool and the assembling tool.

Referring to fig. 6 and 7, it can be understood that when the first side surface 113 and the second side surface 114 are both parallel to the axial center plane 140, the distance between the first side surface 113 and the axial center plane 140 is a, and the distance between the first side surface 113 and the second side surface 114 is b, in order to further facilitate the positioning of the first side surface 113, a and b satisfy the following relationship: and a is 0.5 b. At this time, the central plane between the first side surface 113 and the second side surface 114 is just overlapped with the axial center plane 140, so that the position of the first side surface 113 is easier to locate on the inner wall of the first cylinder 110, the first side surface 113 is convenient to be used as a reference for motor shell processing and a reference for assembly and location, the processing difficulty and the assembly difficulty of the motor shell are further reduced, and the cost of processing and assembly tools is reduced.

Referring to fig. 2, it can be understood that, in order to further improve the accuracy of circumferential positioning of the motor casing and avoid occupying the space of the outer wall of the casing 100, an end plate 122 is disposed at the other end of the casing 100 along the axial direction, the end plate 122 may be welded, clamped or integrally formed at the end of the casing 100, the end plate 122 is provided with at least one second positioning portion 123, the second positioning portion 123 is located at a side of the end plate 122 away from the cavity 121, the second positioning portion 123 is used for cooperating with the second positioning tool 300 to perform secondary circumferential positioning on the motor casing, and the positioning accuracy of the second positioning portion 123 is higher than that of the first positioning portion 112. The middle portion of the end plate 122 is provided with a through hole 124 for passing the motor shaft therethrough, and the second positioning portion 123 is located at the outer periphery of the through hole 124. Specifically, the second positioning portion 123 may be a positioning hole, and the second positioning tool 300 is provided with a positioning pin 310, and the positioning hole is matched with the positioning pin 310 to realize secondary positioning of the motor casing in the circumferential direction; or the second positioning part 123 is a positioning groove, the second positioning tool 300 is provided with a fixture block, and the positioning groove is matched with the fixture block to realize secondary positioning of the motor casing in the circumferential direction; or the second positioning portion 123 is a positioning rib, the positioning rib is convexly arranged on one side of the end plate 122 away from the cavity 121, the second positioning tool 300 is provided with a positioning groove, and the positioning rib is matched with the positioning groove to realize secondary positioning of the motor shell in the circumferential direction; of course, the second positioning portion 123 may also be other positioning structures, which are not listed here.

Referring to fig. 12, during assembly, the motor casing is matched with the first positioning tool 200 through the first positioning portion 112, so as to realize primary positioning of the circumferential direction of the motor casing, prevent the motor casing from shaking in the circumferential direction by a large amplitude, and further facilitate the motor casing to be matched with the second positioning tool 300 through the second positioning portion 123 so as to realize secondary positioning of the circumferential direction of the motor casing, so that the circumferential positioning precision of the motor casing is higher, and the stator is conveniently and accurately installed in the cavity 121 of the motor casing.

Referring to fig. 2 to 4, it can be understood that the second positioning portion 123 is a positioning hole, and accordingly, the second positioning tool 300 is provided with a positioning pin 310 which is matched with the positioning hole, and when positioning is performed, the positioning pin 310 is inserted into the positioning hole, so that secondary positioning of the motor casing in the circumferential direction is achieved. Specifically, the locating hole is the blind hole, avoids debris such as dust to get into the normal work that influences the location in the cavity through the locating hole easily. It is understood that the positioning holes are located at the wall of the end plate 122 facing away from the housing 100, so that the depth of the positioning holes can be set deeper, thereby enhancing the connection strength of the positioning holes with the positioning pins 310. It should be noted that the positioning hole can be a round hole, a square hole or a hole with other shapes, and can be specifically arranged according to actual needs. When the positioning hole is a square hole or other special-shaped holes, the end plate 122 only needs to be provided with one positioning hole, and secondary positioning of the motor shell in the circumferential direction can be realized; when the locating hole is a round hole, the end plate 122 needs to be provided with two or more locating holes to limit the circumferential movement of the motor casing, so that the circumferential secondary location of the motor casing is realized. It can be understood that, in order to facilitate the insertion of the positioning pin 310 into the positioning hole, the opening of the end plate 122 located in the positioning hole is provided with the leading-in end 125, and the leading-in end is provided with a trumpet-shaped leading-in surface, so that the positioning pin 310 can still be inserted into the positioning hole within a certain deviation range, and then the positioning pin 310 is tightly matched with the positioning hole to realize the secondary positioning of the motor casing in the circumferential direction, thereby improving the circumferential positioning accuracy of the motor casing. Of course, the end of the positioning pin 310 may also be provided with a guiding end, and the outer diameter of the guiding end is gradually reduced outwards relative to the positioning pin 310 body, so that the positioning pin 310 can be smoothly inserted into the positioning hole during positioning.

Referring to fig. 2, it can be understood that, in order to reduce the difficulty of the positioning hole and the positioning pin in matching and positioning, the positioning hole is a circular hole, and the circular hole is provided with a plurality of and is distributed at intervals on the end plate 122, and correspondingly, the second positioning tool 300 is also provided with a plurality of cylindrical positioning pins 310, for example, two circular holes are provided, and two cylindrical positioning pins 310 are also provided. During the location, insert the round hole through cylindric locating pin and fix a position, it is easier to operate, and the preparation of round hole is easier simultaneously, reduces the cost of preparation. In addition, through the matching of the positioning holes and the positioning pins 310, the connection strength between the motor shell and the second positioning tool 300 is higher, and the circumferential positioning precision of the motor shell is prevented from being reduced due to the fact that the motor shell is easily shaken between the motor shell and the second positioning tool 300.

Referring to fig. 11, it can be understood that, on a projection plane perpendicular to the axial direction of the second cylinder 120, the axial center plane 140 projects on the projection plane to form a first projection line, wherein the center of a positioning hole projects on the projection plane to form a first projection point, the axial center of the second cylinder 120 projects on the projection plane to form a second projection point, and an included angle between a connection line of the first projection point and the second projection point and the first projection line is c, where c satisfies the following relationship: c is more than or equal to 0 and less than or equal to 90 degrees. Because the contained angle of first line and first projection line is less than or equal to 90 to make second location frock 300 only need rotate less angle can carry out the circumference location of motor casing with the locating hole cooperation, be favorable to improving the speed of location.

Referring to fig. 2 and 3, it can be understood that the end plate 122 is integrally formed with the case 100, so that the end plate 122 is more strongly coupled with the case 100 and more stably coupled therewith.

Referring to fig. 2, it can be understood that the outer wall of the housing 100 is recessed inward to form a clamping position 126, and the clamping position 126 may be substantially square, but may have other shapes, and may be specifically configured according to the clamping requirements of the clamping member. The clamping location 126 is located at the junction of the outer wall of the housing 100 and the end plate 122, thereby facilitating the clamping of the housing 100 by the clamping member from the outside of the end plate 122. When assembling, a clamping member such as a robot arm can clamp and fix the housing 100 through the clamping position 126. Specifically, the clamping position 126 may be provided in plural, and the plurality of clamping positions 126 are distributed at intervals on the circumference of the outer wall of the casing 100, so as to further facilitate the clamping component to clamp the casing 100 from different directions.

The utility model discloses motor (not shown in the figure) of second aspect embodiment, include the utility model discloses motor housing of first aspect embodiment certainly still includes stator (not shown in the figure) and electronic control unit (not shown in the figure), and the stator is installed and is kept away from open one end in motor housing's cavity 121, and electronic control unit sets up and is close to open one end in cavity 121, and uncovered lid through the lid closes, and what need explain, in order to reach better sealed effect, the lid can also be provided with sealed glue with open junction. During motor assembly, motor housing passes through first location portion 112 and the cooperation of first location frock 200, thereby realize motor housing circumferential's location, prevent motor housing from rocking too big range in circumference, then can fix motor housing centre gripping through clamping part, first location frock 200 removes apart from motor housing's uncovered 111 department, conveniently pack the stator into motor housing's cavity 121 through uncovered 111 in, because first location portion 112 is located casing 100's cavity 121, need not to occupy casing 100's outer wall space, thereby the outer wall that has reduced motor housing occupies to exterior space, make things convenient for the installation of motor.

The utility model discloses electric power assisted steering system (not shown in the figure) of third aspect embodiment, include the utility model discloses the motor of second aspect embodiment, motor include motor housing, stator and electronic control unit. 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. The electric power steering system of the embodiment adopts the motor of the embodiment, which is beneficial to improving the installation convenience of the electric power steering system.

The utility model discloses vehicle (not shown in the figure) of fourth aspect embodiment, including the automobile body and the utility model discloses the electric power steering system of third aspect embodiment, electric power steering system installs on the automobile body, and electric power steering system is used for assisting the turning of automobile body. The electric power steering system adopts the motor to directly provide the steering power, and saves a power steering oil pump, a hose, hydraulic oil, a conveyor belt and a belt pulley arranged on an engine which are required by a hydraulic power steering system. The vehicle of the embodiment, adopting the electric power steering system of the above embodiment, is beneficial to improving the convenience of vehicle installation.

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 (14)

1. Motor casing, its characterized in that includes:

the motor casing is characterized in that the casing is cylindrical, a cavity for mounting a stator is formed inside the casing, an opening is formed in one end of the casing in the axial direction, a first positioning portion is further arranged on the casing and used for circumferentially positioning the motor casing, and the first positioning portion is arranged on the wall of the cavity.

2. The motor housing of claim 1, wherein: the first positioning part is a positioning rib which protrudes out of the cavity wall of the cavity and is arranged along the axial direction of the shell.

3. The motor housing of claim 2, wherein: the location muscle is provided with a plurality ofly, and is a plurality of the location muscle is followed the circumference interval distribution of casing.

4. The motor housing of claim 2, wherein: the casing includes first barrel, second barrel and transition shell section, first barrel with pass through between the second barrel the transition shell section is connected, the axial lead of first barrel with the axial lead of second barrel is parallel, the internal diameter of first barrel is greater than the internal diameter of second barrel, uncovered set up in first barrel deviates from the one end of transition shell section, the location muscle set up in first barrel with the junction of transition shell section and orientation uncovered extension.

5. The motor housing of claim 4, wherein: the axial lead of the first cylinder and the plane where the axial lead of the second cylinder are located are axial plane, the two sides of the positioning rib along the circumferential direction of the first cylinder are respectively a first side surface and a second side surface, wherein the first side surface is a plane and is parallel to or coincided with the axial plane.

6. The motor housing of claim 5, wherein: when the first side surface and the second side surface are both parallel to the axis surface, the distance between the first side surface and the axis surface is a, the distance between the first side surface and the second side surface is b, and a and b satisfy the following relations: and a is 0.5 b.

7. The motor housing of claim 5 or 6, wherein: the casing is provided with the end plate along axial other end, one side that the end plate deviates from the cavity is provided with at least one second location portion, second location portion is used for circumference location motor casing.

8. The motor housing of claim 7, wherein: the second positioning part is a positioning hole which is a blind hole.

9. The motor housing of claim 8, wherein: the locating hole is the round hole, the round hole is provided with a plurality of and interval distribution in the end plate.

10. The motor housing of claim 9, wherein: on a projection plane perpendicular to the axial direction of the second cylinder, the projection of the axial center plane forms a first projection line, the projection of the center of one of the positioning holes forms a first projection point, the projection of the axial center line of the second cylinder forms a second projection point, the included angle between the connecting line of the first projection point and the second projection point and the first projection line is c, and the c satisfies the following relations: c is between 0 and 90 degrees.

11. The motor housing of claim 7, wherein: the outer wall indent of casing is formed with the centre gripping position, the centre gripping position is located the outer wall of casing with the junction of end plate.

12. An electric machine, comprising:

a stator;

an electronic control unit;

the motor casing of any one of claims 1 to 11;

the stator is arranged at one end, far away from the opening, of the cavity, the electronic control unit is arranged at one end, close to the opening, of the cavity, and the opening is covered by the cover body.

13. An electric power steering system characterized by comprising the motor of claim 12.

14. A vehicle characterized by comprising the electric power steering system according to claim 13.

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