CN110912300A - Rotating shaft and motor rotor unit - Google Patents
Rotating shaft and motor rotor unit Download PDFInfo
- Publication number
- CN110912300A CN110912300A CN201911081845.7A CN201911081845A CN110912300A CN 110912300 A CN110912300 A CN 110912300A CN 201911081845 A CN201911081845 A CN 201911081845A CN 110912300 A CN110912300 A CN 110912300A
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- China
- Prior art keywords
- rotor
- motor rotor
- electric machine
- rotor unit
- motor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
Abstract
The invention discloses a rotating shaft for a motor rotor unit, which is divided into a left side part and a right side part by a shaft shoulder; the first stepped structure is formed at the left side part of the rotating shaft and adjacent to the shaft shoulder and used for fixing the first motor rotor assembly; the second stepped structure is formed at the left side part of the rotating shaft and is adjacent to the first stepped structure and used for connecting the bearing; the third step structure is formed at the right side part of the rotating shaft and adjacent to the shaft shoulder and used for fixing the magnetic isolation piece; the fourth stepped structure is formed at the right side part of the rotating shaft and is adjacent to the third stepped structure and used for fixing the second motor rotor assembly; and the fifth step structure is formed at the right side part of the rotating shaft and is adjacent to the fourth step structure for connecting the bearing. The invention also discloses a motor rotor unit with the rotating shaft for the redundant motor of the EPS steering system. The invention can realize the double movement of the motor rotor in the space electrical angle, eliminate the torque fluctuation, solve the influence caused by the shaking of the steering wheel of the steering system and improve the safety of the EPS steering system.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a rotating shaft for a motor rotor unit of an EPS (electric power steering) system. The invention also relates to a motor rotor unit with the rotating shaft.
Background
The EPS steering system is one of the most important assemblies on a whole vehicle in terms of personal safety of drivers and passengers, and redundant safety design must be considered to ensure that at least basic and controllable steering capacity can be provided under any condition. Currently, an electric power steering system EPS is composed of an electric control portion and a mechanical structure. Under the condition that an electric control part of a traditional EPS system fails, a driver can drive steering only through mechanical structures such as a pipe column and the like, which is undoubtedly a difficult problem for the driver and is difficult to achieve the aim of safely steering and stopping.
Among them, the motor is an important support member for achieving assist in steering. At present, six-phase motors researched in many journal papers are actually double-shifted in electrical angle on a set of windings, and cannot realize real double-shifting of a motor space electromagnetic field. Therefore, a six-phase redundant motor capable of really realizing the double shift of the motor space electromagnetic field is urgently needed by the EPS steering system.
Disclosure of Invention
The invention aims to provide a rotating shaft for an EPS steering system motor.
The invention also aims to solve the technical problem of a motor rotor unit with the rotating shaft, which is used for a redundant motor (the electrical angle of a rotor assembly of the redundant motor is different by a preset phase angle) of an EPS steering system.
In order to solve the above technical problems, the present invention provides a rotating shaft for an EPS steering system motor, including: the rotating shaft is divided into a left side part and a right side part by a shaft shoulder;
the first stepped structure is formed at the left side part of the rotating shaft and adjacent to the shaft shoulder, and is suitable for fixing the first motor rotor assembly;
the second stepped structure is formed at the left side part of the rotating shaft, is adjacent to the first stepped structure and is suitable for being connected with a bearing;
the third step structure is formed at the right side part of the rotating shaft and is adjacent to the shaft shoulder and is suitable for fixing the magnetic isolation piece;
the fourth stepped structure is formed at the right side part of the rotating shaft, is adjacent to the third stepped structure and is suitable for fixing the second motor rotor assembly;
and a fifth stepped structure formed adjacent to the fourth stepped structure at a right side portion of the rotation shaft, and adapted to connect the bearing.
Optionally, the shaft is further modified such that the first motor rotor assembly and the second motor rotor assembly form a redundant motor rotor.
Optionally, the shaft is further improved, wherein the shaft diameter of the first step structure is larger than that of the second step structure, the shaft diameter of the third step structure is larger than that of the fourth step structure, and the shaft diameter of the fourth step structure is larger than that of the fifth step structure.
Optionally, the shaft is further improved, the shaft diameter of the first step structure is equal to the shaft diameter of the fourth step structure, and the shaft diameter of the second step structure is equal to the shaft diameter of the fifth step structure.
The invention provides a motor rotor unit with any one of the rotating shafts, which comprises:
the magnetic isolation piece is sleeved and fixed on the third step structure, is adjacent to the shaft shoulder and is suitable for carrying out magnetic field isolation on the first motor rotor assembly and the second motor rotor assembly;
the first motor rotor assembly is sleeved and fixed on the first step structure and is adjacent to the shaft shoulder;
the second motor rotor assembly is sleeved and fixed on the fourth stepped structure and is adjacent to the third stepped structure;
the electric angles of the first motor rotor assembly and the second motor rotor assembly are different by a preset phase angle;
alternatively, the electrical angle is different by a predetermined phase angle of 30 degrees.
Or, the relative position between the electromagnetic conversion piece of the axial first motor rotor assembly and the electromagnetic conversion piece of the axial second motor rotor assembly is different by a preset mechanical angle.
Alternatively, the relative position differs by a preset mechanical angle of 15 degrees.
Optionally, the motor rotor unit is further improved, and interference connections are adopted between the first step structure and the first motor rotor assembly, between the third step structure and the magnetism isolating piece, and between the fourth step structure and the second motor rotor assembly.
Optionally, the rotor unit of the motor is further improved, and the magnetism isolating piece is a circular ring body, an annular hole of the circular ring body is used for the rotating shaft to penetrate through, and the fixing pieces are formed on two sides of the annular hole.
Alternatively, the motor rotor unit is further improved, and the firm members are protrusions formed on two side edges of the annular hole and axially extend towards two sides of the annular hole.
Optionally, the motor rotor unit is further improved, and when the first motor rotor assembly and the second motor rotor assembly are respectively installed and fixed, the distances between the first motor rotor assembly and the second motor rotor assembly and the magnetic isolation member are equal.
Optionally, the motor rotor unit is further improved, and the first motor rotor assembly and the second motor rotor assembly are identical in shape, size and structure.
Optionally, the rotor unit of the electric machine is further improved, and the first electric machine rotor assembly comprises:
the electromagnetic conversion piece is a cylinder with a regular polygon cross section, and a first through hole for the rotating shaft to pass through is formed in the center of the cross section of the electromagnetic conversion piece;
a plurality of magnets, each magnet being identical in shape, size and structure;
and a rotor holder having magnets fixed to an outer peripheral wall thereof at regular intervals and an electromagnetic converter fixed therein.
Optionally, the motor rotor unit is further improved, and a plurality of first fixing portions are formed on the inner side wall of the first through hole and are adapted to enhance the fastening force between the first motor rotor assembly and the rotating shaft.
Alternatively, the rotor unit of the motor is further improved, and a plurality of second through holes are arranged around the first through holes and are suitable for adjusting the magnetic circuit of the rotor.
Optionally, the motor rotor unit and the electromagnetic converter are further improved, and the electromagnetic converter is formed by aligning and laminating a plurality of rotor punching sheets with the same shape and size.
Optionally, the motor rotor unit and the electromagnetic converter are further improved, and the electromagnetic converter is formed by aligning and laminating a plurality of rotor punching sheets with the same shape, size and structure.
Optionally, the rotor unit of the motor is further improved, and the cross section of each rotor punching sheet is a regular polygon.
Optionally, the motor rotor unit is further improved, and the second fixing portions are formed by stacking openings at inner corners of regular polygons of the rotor punching sheets, and are suitable for connecting and fixing the electromagnetic conversion member with the rotor bracket.
Optionally, the motor rotor unit is further improved, and the second fixing part is a strip-shaped groove.
Optionally, the motor rotor unit is further improved, and the width of the bottom of the strip-shaped groove is greater than or equal to the width of the groove opening of the strip-shaped groove.
Optionally, the rotor unit of the motor is further improved, and the cross section of each rotor punching sheet is a 10-sided polygon.
Optionally, the motor rotor unit is further improved, and the magnet is a cuboid with a cambered top surface.
Optionally, the motor rotor unit is further improved, the width of the bottom surface of the magnet is less than or equal to the side length of a regular polygon of the electromagnetic conversion part, and the cambered surface of the magnet is internally tangent to the outer side surface of the rotor bracket body.
Alternatively, the rotor unit of the motor, the rotor support, is a hollow cylinder with only a bottom surface, which is a circular ring.
Alternatively, the rotor unit of the motor may be further modified by a plurality of third fixing portions formed on the outer circumferential side wall of the rotor frame cylinder, each of the third fixing portions having a magnet fixed therein.
Optionally, the motor rotor unit is further improved, and the third fixing portion is a slot.
Alternatively, the rotor unit of the motor may be further modified by a plurality of fourth fixing portions formed on the inner circumferential side wall of the cylinder of the rotor frame and adapted to interference-couple the electromagnetic converter with the rotor frame.
Alternatively, the rotor unit of the motor may be further modified by a fourth fixing portion, which is a projection adapted to enhance a fastening force between the electromagnetic conversion member and the rotor holder.
Optionally, the motor rotor unit is further improved, and a plurality of fourth fixing portions are formed on the inner circumferential side wall of the rotor support cylinder and are suitable for being in plug-in fit with the second fixing portions to enable the electromagnetic conversion piece to be fixedly connected with the rotor support.
Optionally, the motor rotor unit is further modified by a fourth fixing portion adapted to be inserted into the second fixing portion, and forming a plug-in connection with the second fixing portion.
Optionally, the motor rotor unit is further modified, and the fourth fixing part is a strip-shaped convex part adaptive to the shape of the second fixing part, and the top width of the strip-shaped convex part is greater than or equal to the bottom width of the strip-shaped convex part.
The invention provides a motor rotor unit which is assembled by rotating shafts and can be used for a redundant motor of an EPS (redundant motor rotor assembly with an electrical angle difference of a preset phase angle), taking a double-shift 30-degree phase belt as an example, the invention adopts the following steps:
1. the rotor punching sheets are laminated and riveted to form an electromagnetic conversion piece (namely an iron core).
2. Inserting a magnet (magnetic steel) into the rotor bracket, fixedly assembling the rotor bracket and the electromagnetic conversion piece to form a motor rotor assembly, and repeatedly manufacturing a redundant motor rotor assembly;
3. pressing the right side part of the magnetic isolation piece from the rotating shaft to the third step structure to form interference fixation, and performing axial positioning through a shaft shoulder to obtain a rotating shaft and a magnetic isolation strip assembly; the mutual interference of the magnetic fields of the two magnetic fields is isolated, and the purpose of mutually independent control is achieved.
4. The motor rotor assemblies respectively rotate from two sides through a press machine, and the two redundant motor rotor assemblies are respectively fixed on the first stepped structure and the fourth stepped structure in an interference mode. And the relative position between the two redundant motor rotor assemblies is staggered by 15 mechanical angles, so that the electrical angle characteristic of the rotor is ensured.
The motor rotor components are respectively pressed at the two ends of the rotating shaft, the motor rotor components at the two ends form the redundant rotor of the redundant motor, double movement of the motor rotor in the space electrical angle can be realized, and a technical scheme for realizing the real double movement of the motor space electromagnetic field (for example, double movement of the 10-pole 12-slot rotor by 30 degrees) is provided. The left rotor electromagnetic conversion piece (iron core) and the right rotor electromagnetic conversion piece (iron core) are pressed into the rotating shaft at an electrical angle with a difference of 30 degrees, so that the elimination of torque fluctuation in the real sense can be realized, the influence caused by the shaking of a steering wheel of a steering system is solved, and the safety of the EPS steering system is improved. The windings of the rotor component of the motor can be mutually independent, and the motor can be controlled independently technically. The height of the magnetic isolation piece (magnetic isolation sheet) in the middle of the rotating shaft is reasonably set, so that the advantage and the characteristic of effective isolation of the magnetic fields of the stator and the rotor of the redundant motor can be better reflected. A first fixing part is additionally arranged on the inner side wall of a first through hole in the motor electromagnetic conversion part (iron core), so that the motor electromagnetic conversion part (iron core) is in interference fit with a rotating shaft conveniently, and the rotor punching sheet is prevented from cracking. The second fixing part adopts the slot to ensure that the magnet (magnetic steel) is more reliably fixed, the integral reliability of the motor is improved, the production cost is reduced, and the production benefit is improved.
Drawings
The invention will be described in further detail with reference to the following detailed description and accompanying drawings:
FIG. 1 is a schematic structural diagram of a first embodiment of a rotating shaft according to the present invention.
Fig. 2 is a first structural schematic diagram of a rotor unit of a motor according to a first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of the first embodiment of the rotor unit of the motor of the present invention, which shows a cross section of the rotor unit of the motor.
FIG. 4 is a first structural view of the magnetic isolation member according to the first embodiment of the present invention.
Fig. 5 is a second structural schematic view of the first embodiment of the magnetic isolation member of the present invention, which shows a cross section of the magnetic isolation member.
Fig. 6 is a schematic structural diagram of a rotor assembly of an electric machine according to a first embodiment of the present invention.
Fig. 7 is a schematic view of a first single structure of the rotor sheet of the present invention.
FIG. 8 is a schematic view of a second single structure of the rotor sheet of the present invention.
FIG. 9 is a schematic structural diagram of a third single body of the rotor sheet of the present invention.
Fig. 10 is a schematic structural diagram of an electromagnetic converter formed by stacking and riveting single rotor sheets shown in fig. 8.
Fig. 11 is a schematic structural diagram of an electromagnetic converter formed by stacking and riveting single rotor sheets shown in fig. 9.
Fig. 12 is a schematic structural view of a first embodiment of the magnet of the present invention.
Fig. 13 is a schematic structural view of a first embodiment of a rotor support according to the present invention.
Fig. 14 is a schematic structural view of a second embodiment of the rotor support of the present invention.
Fig. 15 is a schematic structural view of the rotor assembly of the motor formed by the second embodiment of the rotor bracket and the electromagnetic converter shown in fig. 10.
Description of the reference numerals
Shaft shoulder 1.1
First step structure 1.2
Second step structure 1.3
Third step structure 1.4
Fourth step structure 1.5
Fifth step structure 1.6
First motor rotor assembly 3
Second motor rotor assembly 4
Annular ring 2.1
Steady piece 2.2
Electromagnetic converter 3.1
First through-hole 3.1.1
Rotor punching sheet 3.1.2
Second through-hole 3.1.3
First fixed part 3.1.1.1
Second fixing part 3.1.1.2
Magnet 3.2
Rotor support 3.3
Third fixing part 3.3.1
A fourth fastening section 3.3.2.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and technical effects of the present invention will be fully apparent to those skilled in the art from the disclosure in the specification. The invention is capable of other embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the general spirit of the invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. In the following embodiments, the plurality means at least three.
As shown in fig. 1, the present invention provides a first embodiment of a shaft 1 for an EPS steering system motor, comprising: the shaft is divided into a left side part and a right side part by a shaft shoulder 1.1;
a first step structure 1.2 formed on the left side of the shaft adjacent to the shoulder 1.1 and adapted to secure a first motor rotor assembly (not shown);
a second step structure 1.3, formed adjacent to the first step structure 1.2 on the left side of the shaft, adapted to be connected to a bearing (not shown);
a third step structure 1.4 formed at the right side of the rotating shaft adjacent to the shoulder 1.1 and adapted to fix the magnetic shield;
a fourth step structure 1.5, formed on the right side of the shaft adjacent to the third step structure 1.4, adapted to secure a second motor rotor assembly (not shown);
a fifth step structure 1.6, formed adjacent to the fourth step structure 1.6 on the right side of the shaft, is adapted to connect a bearing (not shown).
The two ends of the rotating shaft provided by the invention can be respectively pressed with the motor rotor assembly, and the advantage and the characteristic of effective isolation of stator and rotor magnetic fields of a redundant motor using the rotating shaft can be better reflected by reasonably setting the height of the magnetism isolating piece (magnetism isolating sheet) in the middle of the rotating shaft. The electromagnetic conversion pieces (iron cores) of the left rotor and the right rotor are pressed into the rotating shaft of the invention at an electrical angle with a difference of 30 degrees, so that the double movement of the motor rotor in the space electrical angle can be realized, the elimination of torque fluctuation can be realized in the true sense, the influence caused by the shaking of a steering wheel of a steering system is solved, and the help is provided for the safety of a redundant system. The rotating shaft can provide mutually independent rotor assemblies, and realizes independent control from the motor technology.
The first embodiment of the shaft is further modified such that the first motor rotor assembly and the second motor rotor assembly form a redundant motor rotor.
In the first embodiment of the rotating shaft, the diameter of the first stepped structure shaft is larger than that of the second stepped structure shaft, the diameter of the third stepped structure shaft is larger than that of the fourth stepped structure shaft, and the diameter of the fourth stepped structure shaft is larger than that of the fifth stepped structure shaft.
In a further modification of the first embodiment of the rotating shaft, the first step structure shaft diameter is equal to the fourth step structure shaft diameter, and the second step structure shaft diameter is equal to the fifth step structure shaft diameter.
As shown in fig. 2 and 3, the present invention provides a first embodiment of a rotor unit of an electric motor having a rotating shaft as described above, including:
the magnetic isolation piece 2 is sleeved and fixed on the third step structure 1.4, is adjacent to the shaft shoulder 1.1, and is suitable for carrying out magnetic field isolation on the first motor rotor assembly 3 and the second motor rotor assembly 4;
a first motor rotor assembly 3 which is fixed on the first step structure 1.2 in a sleeved mode and is adjacent to the shaft shoulder 1.1;
a second motor rotor assembly 4, which is fixed on the fourth step structure 1.5 in a sleeved manner and is adjacent to the third step structure 1.4;
wherein, the electrical angle of the first motor rotor assembly 3 and the second motor rotor assembly 4 is different by a preset phase angle; alternatively, the predetermined phase angle is 30 degrees.
Or, the relative position between the electromagnetic conversion piece of the axial first motor rotor assembly and the electromagnetic conversion piece of the axial second motor rotor assembly is different by a preset mechanical angle. Alternatively, the preset mechanical angle is 15 degrees.
The motor rotor unit provided by the invention can be respectively pressed on the motor rotor component from two ends of the rotating shaft, and the advantage and the characteristic of effective isolation of the magnetic fields of the stator and the rotor of the motor using the rotating shaft can be better reflected by reasonably setting the height of the magnetic isolation piece (the magnetic isolation sheet) in the middle of the rotating shaft. The electromagnetic conversion pieces (iron cores) of the left rotor and the right rotor are pressed into the rotating shaft of the invention at an electrical angle with a difference of 30 degrees, so that the double movement of the motor rotor in the space electrical angle can be realized, the elimination of torque fluctuation can be realized in the true sense, the influence caused by the shaking of a steering wheel of a steering system is solved, and the help is provided for the safety of a redundant system. The rotating shaft can provide mutually independent rotor assemblies, and realizes independent control from the motor technology.
Wherein, adopt interference connection between first stair structure 1.2 and the first motor rotor subassembly 3, between third stair structure 1.4 and the magnetism piece 2 and between fourth stair structure 1.5 and the second motor rotor subassembly 4.
Further improve the above-mentioned first embodiment of the motor rotor unit, after first motor rotor subassembly 3 and second motor rotor subassembly 4 are installed and fixed respectively, it is equal with the distance between magnetism isolating piece 2. The equidistant arrangement facilitates the formation of redundant structures in terms of magnetic field and structure.
Further improving the first embodiment of the motor rotor unit described above, the first motor rotor assembly 3 and the second motor rotor assembly 4 are identical in shape, size and structure.
As shown in fig. 4 and 5, the present invention provides a first embodiment of the magnetic shielding member 2 applicable to the first embodiment of the rotor unit of the electric machine, which is a circular ring body, wherein a ring hole 2.1 of the circular ring body is penetrated by the rotating shaft 1, and the two sides of the ring hole 2.1 are formed with the fixing members 2.2. The steady piece 2.2 is a convex part formed on the two side edges of the ring hole 2.1 and extending to the two sides of the ring hole along the axial direction.
As shown in fig. 6, the present invention provides a first embodiment of a rotor assembly of an electric machine applicable to the first embodiment of the rotor unit of the electric machine, comprising:
the electromagnetic conversion piece 3.1 is a cylinder with a regular polygon cross section, and a first through hole 3.1.1 for the rotating shaft 1 to pass through is formed in the center of the cross section;
a plurality of magnets 3.2, each magnet 3.2 being of the same shape, size and configuration;
the rotor holder 3.3 has magnets 3.2 fixed to the outer peripheral wall thereof at regular intervals, and an electromagnetic converter 3.1 fixed therein.
The present invention provides a first embodiment of an electromagnetic conversion element applicable to the first embodiment of the rotor assembly of an electric machine, comprising:
the electromagnetic conversion piece 3.1 is formed by stacking and riveting a plurality of rotor punching sheets 3.1.2 with the same shape and size along the edges and the center in a complete alignment mode.
Referring to fig. 7, a first monomer structure of each rotor punching 3.1.2 is shown, and after a plurality of rotor punching 3.1.2 are aligned, a hole layer at the center of each rotor punching 3.1.2 is laminated to form a first through hole 3.1.1.
Each convex part in each rotor punching 3.1.2 centre bore forms a plurality of first fixed part 3.1.1.1 on first through-hole 3.1.1 inside wall through range upon range of, and it is applicable to the fastening force between reinforcing first motor rotor subassembly and the pivot interference connection. The structure of each rotor punching sheet 3.1.2 after being stacked and riveted is shown in fig. 10.
In this embodiment, the rotor sheets 3.1.2 have the same shape, size and structure.
A second embodiment of the electromagnetic conversion member is further improved and formed on the basis of the first embodiment of the electromagnetic conversion member, and includes:
and the electromagnetic conversion piece 3.1 is formed by stacking and riveting a plurality of rotor punching sheets 3.1.2 with the same shape and size along the edge and the center in an aligned mode.
Referring to fig. 8, after a plurality of aligned rotor sheets 3.1.2 are aligned, a hole layer at the center of each rotor sheet 3.1.2 is laminated to form a first through hole 3.1.1.
Each convex part in each rotor punching 3.1.2 centre bore forms a plurality of first fixed part 3.1.1.1 on first through-hole 3.1.1 inside wall through range upon range of, and it is applicable to the fastening force between reinforcing first motor rotor subassembly and the pivot interference connection. The structure of each rotor punching sheet 3.1.2 after being stacked and riveted is shown in fig. 10.
A plurality of second through holes 3.1.3, arranged around the first through holes 3.1.1, are adapted to regulate the rotor magnetic circuit. The position and the aperture of the second through hole 3.1.3 are different, so that the magnetic circuit of the rotor can be adjusted.
In this embodiment, the rotor sheets 3.1.2 have the same shape, size and structure.
Correspondingly, the shape and the size of each rotor punching sheet 3.1.2 are only assumed, but the specific internal structure is different and the same. For example, the magnetic circuit adjustment can also be realized by different positions, apertures or numbers of the second through holes 3.1.3 on each rotor punching sheet 3.1.2.
The third embodiment of the electromagnetic conversion member is further improved and formed on the basis of the second embodiment of the electromagnetic conversion member, and comprises:
and the electromagnetic conversion piece 3.1 is formed by stacking and riveting a plurality of rotor punching sheets 3.1.2 with the same shape and size along the edge and the center in an aligned mode.
A third monomer of each rotor punching sheet 3.1.2 is shown in fig. 9, and after a plurality of the third monomers are aligned along the rotor punching sheets 3.1.2, the hole layer at the center of each rotor punching sheet 3.1.2 is laminated to form a first through hole 3.1.1.
Each convex part in each rotor punching 3.1.2 centre bore forms a plurality of first fixed part 3.1.1.1 on first through-hole 3.1.1 inside wall through range upon range of, and it is applicable to the fastening force between reinforcing first motor rotor subassembly and the pivot interference connection.
A plurality of second through holes 3.1.3, arranged around the first through holes 3.1.1, are adapted to regulate the rotor magnetic circuit. In this embodiment, the rotor sheets 3.1.2 have the same shape, size and structure.
And a plurality of second fixing portions 3.1.1.2, each second fixing portion 3.1.1.2 is a strip-shaped groove formed by stacking openings at each inner corner of the regular polygon of each rotor sheet, and is suitable for connecting and fixing the electromagnetic conversion element and the rotor bracket.
Wherein, the width of the bottom of the strip-shaped groove is more than or equal to the width of the strip-shaped groove opening. The structure of each rotor punching sheet 3.1.2 after being stacked and riveted is shown in fig. 11.
The cross section of each of the rotor sheets of the first to third embodiments of the electromagnetic conversion element is a regular 10-sided polygon.
As shown in fig. 12, the present invention provides a first embodiment of a magnet applicable to a first embodiment of a rotor assembly for an electric machine, comprising:
and the magnet 3.2 is a cuboid with a cambered surface on the top surface, the width of the bottom surface of the magnet is less than or equal to the side length of a regular polygon of the electromagnetic conversion part adjacent to the magnet, and the cambered surface of the magnet is internally tangent to the outer side surface of the rotor support body.
As shown in fig. 13, the present invention provides a first embodiment of a rotor support applicable to a first embodiment of a rotor assembly for an electric machine, comprising:
and a rotor holder 3.3 which is a hollow cylinder having only a bottom surface which is a circular ring (a ring hole of which is penetrated by the rotating shaft 1), and on the outer peripheral wall of which magnets 3.2 are fixed at equal intervals and in which an electromagnetic converter 3.1 is fixed.
A plurality of third fixing parts 3.3.1 which are slots formed on the outer circumferential side wall of the cylinder of the rotor frame 3.3, each third fixing part 3.3.1 fixing a magnet 3.2 therein.
The fourth fixing portions 3.3.2 are projections (ribs) formed on the inner peripheral side wall of the cylinder of the rotor holder 3.3, and when the electromagnetic conversion element 3.1 is pressed into the rotor holder 3.3, the fourth fixing portions 3.3.2 promote interference between the electromagnetic conversion element 3.1 and the rotor holder 3.3, thereby increasing fastening force.
As shown in fig. 14, the present invention provides a second embodiment of a rotor holder applicable to the first embodiment of the rotor assembly of an electric machine, which is different from the second embodiment of the rotor holder described above in the specific structure of the fourth fixing portion 3.3.2.
And a plurality of fourth fixing portions 3.3.2, which are strip-shaped protrusions (ribs) formed on the inner peripheral sidewall of the cylinder of the rotor holder 3.3, and which can be inserted into the second fixing portions 3.1.1.2, and can be inserted into the second fixing portions 3.1.1.2 to connect and fix the electromagnetic converter to the rotor holder.
In this embodiment, the fourth fixing portion 3.3.2 is a strip-shaped protrusion (convex rib) adapted to the shape of the second fixing portion 3.1.1.2, the top width of the strip-shaped protrusion is greater than or equal to the bottom width of the strip-shaped protrusion, and the strip-shaped protrusion can be inserted into and fixed with the second fixing portion of the third embodiment of the electromagnetic conversion member 3.1 shown in fig. 10, so as to form the motor rotor assembly shown in fig. 15.
And the electromagnetic converter, the magnet and the rotor bracket are assembled to form the motor rotor assembly. When the redundant motor rotor assembly is installed on the rotating shaft 1, the openings (the top surfaces of the rotor brackets) of the redundant motor rotor assembly are oppositely installed (the top surfaces of the rotor brackets face the magnetic isolation pieces), and the redundant motor rotor assembly is shown in a reference figure 2.
The present invention has been described in detail with reference to the specific embodiments and examples, but these are not intended to limit the present invention. Many variations and modifications may be made by one of ordinary skill in the art without departing from the principles of the present invention, which should also be considered as within the scope of the present invention.
Claims (31)
1. A rotating shaft for a rotor unit of an electric machine, characterized in that: the rotating shaft is divided into a left side part and a right side part by a shaft shoulder;
the first stepped structure is formed at the left side part of the rotating shaft and adjacent to the shaft shoulder, and is suitable for fixing the first motor rotor assembly;
the second stepped structure is formed at the left side part of the rotating shaft, is adjacent to the first stepped structure and is suitable for being connected with a bearing;
the third step structure is formed at the right side part of the rotating shaft and is adjacent to the shaft shoulder and is suitable for fixing the magnetic isolation piece;
the fourth stepped structure is formed at the right side part of the rotating shaft, is adjacent to the third stepped structure and is suitable for fixing the second motor rotor assembly;
and a fifth stepped structure formed adjacent to the fourth stepped structure at a right side portion of the rotation shaft, and adapted to connect the bearing.
2. A spindle according to claim 1, wherein: the first motor rotor assembly and the second motor rotor assembly form a redundant motor rotor.
3. A spindle according to claim 1, wherein: the first step structure shaft diameter is larger than the second step structure shaft diameter, the third step structure shaft diameter is larger than the fourth step structure shaft diameter, and the fourth step structure shaft diameter is larger than the fifth step structure shaft diameter.
4. A spindle according to claim 3, wherein: the first step structure shaft diameter is equal to the fourth step structure shaft diameter, and the second step structure shaft diameter is equal to the fifth step structure shaft diameter.
5. A rotor unit for an electrical machine having a shaft according to claim 1, comprising:
the magnetic isolation piece is sleeved and fixed on the third step structure, is adjacent to the shaft shoulder and is suitable for carrying out magnetic field isolation on the first motor rotor assembly and the second motor rotor assembly;
the first motor rotor assembly is sleeved and fixed on the first step structure and is adjacent to the shaft shoulder;
the second motor rotor assembly is sleeved and fixed on the fourth stepped structure and is adjacent to the third stepped structure;
the electric angles of the first motor rotor assembly and the second motor rotor assembly are different by a preset phase angle;
or, the relative position between the electromagnetic conversion piece of the axial first motor rotor assembly and the electromagnetic conversion piece of the axial second motor rotor assembly is different by a preset mechanical angle.
6. The electric machine rotor unit of claim 5, wherein: the difference between the electrical angles of the two motor rotor assemblies is 30 degrees, and the difference between the relative positions of the two motor rotor assemblies is 15 degrees.
7. The electric machine rotor unit of claim 5, wherein: the first step structure and the first motor rotor assembly are connected in an interference mode, the third step structure and the magnetism isolating piece and the fourth step structure and the second motor rotor assembly are connected in an interference mode.
8. The electric machine rotor unit of claim 5, wherein: the magnetic isolation piece is a ring body, the ring hole of the magnetic isolation piece is used for the rotating shaft to pass through, and the two sides of the ring hole are provided with the stable pieces.
9. The electric machine rotor unit of claim 8, wherein: the firm piece is the convex part that forms along the axial extension to the ring opening both sides at ring opening both sides border.
10. The electric machine rotor unit of claim 8, wherein: after the first motor rotor assembly and the second motor rotor assembly are respectively installed and fixed, the distance between the first motor rotor assembly and the magnetic isolation piece is equal.
11. The electric machine rotor unit of claim 8, wherein: the first and second motor rotor assemblies are identical in shape, size and structure.
12. The electric motor rotor unit of claim 11, wherein the first electric motor rotor assembly comprises:
the electromagnetic conversion piece is a cylinder with a regular polygon cross section, and a first through hole for the rotating shaft to pass through is formed in the center of the cross section of the electromagnetic conversion piece;
a plurality of magnets, each magnet being identical in shape, size and structure;
and a rotor holder having magnets fixed to an outer peripheral wall thereof at regular intervals and an electromagnetic converter fixed therein.
13. The electric machine rotor unit of claim 12, wherein: and the first fixing parts are formed on the inner side wall of the first through hole and are suitable for enhancing the fastening force between the first motor rotor assembly and the rotating shaft.
14. The electric machine rotor unit of claim 12, wherein: and a plurality of second through holes arranged around the first through holes, which are adapted to regulate the rotor magnetic circuit.
15. The electric machine rotor unit of claim 12, wherein: and the electromagnetic conversion piece is formed by aligning and laminating a plurality of rotor punching sheets with the same shape and size.
16. The electric machine rotor unit of claim 12, wherein: the electromagnetic conversion piece is formed by aligning and laminating a plurality of rotor punching sheets with the same shape, size and structure.
17. A rotor unit according to claim 15 or 16, wherein: the cross section of each rotor punching sheet is a regular polygon.
18. The electric machine rotor unit of claim 17, wherein: and each second fixing part is formed by stacking openings at the inner corners of the regular polygon of each rotor punching sheet and is suitable for connecting and fixing the electromagnetic conversion piece and the rotor bracket.
19. The electric machine rotor unit of claim 18, wherein: the second fixing part is a strip-shaped groove.
20. The electric machine rotor unit of claim 19, wherein: the width of the bottom of the strip-shaped groove is more than or equal to the width of the strip-shaped groove opening.
21. The electric machine rotor unit of claim 17, wherein: the cross section of each rotor punching sheet is 10-edge.
22. The electric machine rotor unit of claim 12, wherein: the magnet is a cuboid with a cambered surface on the top surface.
23. The electric machine rotor unit of claim 22, wherein: the width of the bottom surface of the magnet is less than or equal to the side length of a regular polygon of the electromagnetic conversion part, and the cambered surface of the magnet is internally tangent to the outer side surface of the rotor bracket main body.
24. The electric machine rotor unit of claim 5, wherein: the rotor bracket is a hollow cylinder with only a bottom surface, and the bottom surface is a circular ring.
25. The electric machine rotor unit of claim 24, wherein: and a plurality of third fixing parts formed on the outer circumferential side wall of the rotor frame column, each of the third fixing parts fixing therein one of the magnets.
26. The electric machine rotor unit of claim 25, wherein: the third fixing part is a slot.
27. The electric machine rotor unit of claim 17, wherein: and the fourth fixing parts are formed on the inner peripheral side wall of the rotor bracket cylinder and are suitable for connecting the electromagnetic conversion piece with the rotor bracket in an interference mode.
28. The electric machine rotor unit of claim 27, wherein: and a fourth fixing portion which is a convex portion adapted to enhance a fastening force between the electromagnetic conversion member and the rotor holder.
29. The electric machine rotor unit of claim 18, wherein: and the fourth fixing parts are formed on the inner peripheral side wall of the cylinder of the rotor bracket and are suitable for being in inserted fit with the second fixing parts so as to enable the electromagnetic conversion piece to be connected and fixed with the rotor bracket.
30. A rotor unit according to claim 29, wherein: and the fourth fixing part is suitable for being inserted into the second fixing part and is spliced with the second fixing part.
31. A rotor unit according to claim 30, wherein: the fourth fixing part is a strip-shaped convex part which is matched with the second fixing part in shape, and the width of the top part of the fourth fixing part is larger than or equal to that of the bottom part of the fourth fixing part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911081845.7A CN110912300A (en) | 2019-11-07 | 2019-11-07 | Rotating shaft and motor rotor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911081845.7A CN110912300A (en) | 2019-11-07 | 2019-11-07 | Rotating shaft and motor rotor unit |
Publications (1)
| Publication Number | Publication Date |
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| CN110912300A true CN110912300A (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911081845.7A Pending CN110912300A (en) | 2019-11-07 | 2019-11-07 | Rotating shaft and motor rotor unit |
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| CN (1) | CN110912300A (en) |
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Effective date of registration: 20200604 Address after: 200031 No. 390, Wukang Road, Xuhui District, Shanghai Applicant after: SAIC MOTOR Corp.,Ltd. Applicant after: DIAS AUTOMOTIVE ELECTRONIC SYSTEM Co.,Ltd. Address before: 201206 Shanghai city Pudong New Area Jinji Road 33 Lane 4 Building 4 floor Applicant before: DIAS AUTOMOTIVE ELECTRONIC SYSTEM Co.,Ltd. |
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Application publication date: 20200324 |
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