CN218733509U - Motor structure, electric power steering system and vehicle - Google Patents

Abstract

An embodiment of the utility model provides a motor structure, electric power steering system and vehicle, wherein, the motor structure includes: the motor comprises a shell, a stator structure and a rotor structure are arranged in the shell, the rotor structure comprises a rotor shaft, a stator winding is arranged on the stator structure, the stator winding is formed by at least one winding wire with a winding wire end part, the winding wire end part is electrically contacted with a wiring terminal of a bus bar structure at the end part, the bus bar structure is arranged at one end of the stator structure, and the stator winding is led out outwards through the bus bar structure; the end cover body is arranged at one end of the shell, a bearing groove is formed in the first end of the end cover body, and an installation groove is formed in the second end of the end cover body; the circuit board is arranged at the second end of the end cover body; the magnetism isolating ring is arranged in the mounting groove and is made of a magnetic conducting material. The technical scheme of the utility model in, through adopting magnetic materials separate the magnetic ring, can weaken rotor structure's axial magnetic field to guarantee the reliability of motor operation.

Description

Motor structure, electric power steering system and vehicle

Technical Field

The utility model relates to the technical field of electric machines, particularly, relate to a motor structure, an electric power steering system and a vehicle.

Background

At present, when an existing motor works, axial magnetic leakage can be generated due to rotation, leaked magnetic fields can affect signal output of electronic devices arranged on the motor, for example, a sensor and the like easily cause the motor to be incapable of operating, or give out wrong instructions to cause misoperation.

SUMMERY OF THE UTILITY MODEL

The present invention aims at least solving one of the technical problems existing in the prior art or the related art.

In view of this, the embodiment of the first aspect of the present invention provides a motor structure.

An embodiment of the second aspect of the present invention provides an electric power steering system.

An embodiment of the third aspect of the present invention provides a vehicle.

In order to achieve the above object, an embodiment of the first aspect of the present invention provides a motor structure, including: the motor comprises a shell, a stator structure and a rotor structure are arranged in the shell, the rotor structure comprises a rotor shaft, a stator winding is arranged on the stator structure, the stator winding is formed by at least one winding wire with a winding wire end part, the winding wire end part is electrically contacted with a wiring terminal of a bus bar structure at the end part, the bus bar structure is arranged at one end of the stator structure, and the stator winding is led out outwards through the bus bar structure; the end cover body is arranged at one end of the shell, a bearing groove is formed in the first end of the end cover body, an installation groove is formed in the second end of the end cover body, and one end, facing the end cover body, of the rotor shaft extends into the bearing groove; the circuit board is arranged at the second end of the end cover body; the magnetism isolating ring is arranged in the mounting groove and is made of a magnetic conducting material.

According to the utility model discloses an embodiment provides a motor structure, including the casing and locate the end cover body and the circuit board of casing one end, set up stator structure and rotor structure in the casing, can make rotor structure drive rotor shaft together rotate under stator structure's drive, end cover body mainly used cooperates with the terminal surface of motor, realizes the assembly, and the circuit board then sets up the outside at end cover structure to the realization is to the control of motor operation. Specifically, in order to resist magnetic leakage generated after the rotor structure rotates relative to the stator structure, a magnetism isolating ring is arranged in the mounting groove at the second end of the end cover body, the axial magnetic field of the rotor structure can be weakened through the magnetism isolating ring made of magnetic conducting materials, especially the influence on signal transmission of some electronic components on a circuit board is weakened, and therefore the reliability of motor operation is guaranteed.

The winding wire end part is electrically connected with the wiring terminal of the bus bar structure at the end part directly, and the winding wire end part can be indirectly connected with the wiring terminal of the bus bar structure through the bus bar structure, namely, the winding wire end part is connected to the bus bar structure, the wiring terminal is arranged on the other side of the bus bar structure, and the winding wire end part and the wiring terminal are electrically conducted through the electrical conductivity of the bus bar structure.

Wherein, the first end of end cover body is inner, should be the one end towards rotor structure promptly, through set up the bearing groove in this downthehole to inwards place the bearing, thereby guarantee the axiality of rotor structure when rotating, also play certain limiting displacement for the rotor shaft simultaneously.

It is necessary to supplement that the rotor structure can drive the rotor shaft to rotate around the axis under the action of the stator structure, and the driving of the stator structure to the rotor structure is mainly realized by electrifying the stator winding to generate a transformed magnetic field. Further, the stator winding includes one or more winding wires, each having a winding wire end portion, which may be electrically contacted, i.e., electrically conducted, at the end portion with a connection terminal of the bus bar structure, thereby achieving a normal power supply control. It can be understood that the bus bar structure is located the tip of stator structure, and winding wire can have the end of a thread after accomplishing the winding on the stator structure, also winding wire tip, through gathering winding wire tip, utilizes the structural binding post of bus bar to classify and connect, and then realizes total power supply.

It will be appreciated that the number of winding wires may be dependent upon the number of phases of the machine structure.

The magnetic isolation ring and the circuit board are arranged at the outer end of the end cover body, the magnetic isolation ring is arranged in the mounting groove, different electric control elements, sensing elements and the like are arranged on the circuit board, the mounting groove is specially formed in the outer end of the end cover body, so that the different electric control elements can be conveniently arranged, namely, some elements needing to be placed at the axis for detection can be placed at the mounting groove, and the other parts of the elements can be placed at the outer end of the circuit board.

Further, the end cover body can be made of aluminum alloy materials, and the magnetism isolating ring can be made of carbon steel materials.

Wherein, rotor structure sets up in stator structure's inboard, forms the motor structure of the outer stator of inner rotor, can also set up rotor structure in the outside of stator, forms the motor structure of the interior stator of outer rotor. The end cover structure is arranged at one end of the machine shell, and the rotor shaft of the rotor structure is directly inserted into the bearing groove, so that the rotor shaft is supported in a rotating mode.

In addition, the end cover structure is arranged at one end of the machine shell, and the rotor shaft of the rotor structure is directly inserted into the bearing groove, so that the rotor shaft is supported in a rotating mode.

Among the above-mentioned technical scheme, the tank bottom of bearing groove is linked together with the tank bottom of mounting groove, and the end cover structure still includes: and the position sensing assembly is arranged on the radial inner side of the magnetism isolating ring.

In this technical scheme, through being linked together bearing groove and mounting groove, when setting up position sensing subassembly, the rotation signal that takes place by rotor shaft department can be better received to be convenient for realize motor rotational position's detection.

It is emphasized that the position sensing assembly is arranged on the radial inner side of the magnetism isolating ring, so that an interference magnetic field generated by the rotation of the rotor structure can be weakened under the action of the magnetism isolating ring, and the acquisition and control of the position sensing assembly on the integral operation parameters of the motor are ensured.

Among the above-mentioned technical scheme, the position sensing subassembly specifically includes: the position sensor is arranged in the mounting groove and is connected with the rotor shaft; the signal receiver is arranged on one side of the circuit board, which faces the end cover body, and is used for receiving a sensing signal sent by the position sensor; wherein at least part of the signal receiver is positioned in the mounting groove.

In this technical scheme, position sensing subassembly mainly includes position sensor and signal receiver, and wherein, position sensor sets up in the mounting groove, and it can acquire rotor structure's rotation state isoparametric, and in addition, still set up signal receiver on the circuit board, specifically for setting up in one side of circuit board towards the end cover body to the signal that position sensor sent is received to the receiving.

It should be noted that, part of the signal receiver, or the whole structure, is arranged in the mounting groove, so that the normal transmission of the signal transmission path between the position sensor and the signal receiver can be ensured under the action of the magnetism isolating ring, and the anti-interference capability is improved.

Among the above-mentioned technical scheme, there is the clearance between position sensor and the signal receiver, and sensing signal is wireless signal.

In the technical scheme, the position sensor can send out a wireless signal corresponding to the rotation position of the rotor shaft, the circuit board is provided with the signal receiver arranged at an interval with the position sensor, and the sensing signal can be transmitted to the signal receiver by utilizing wireless transmission between the signal receiver and the position sensor without a conducting wire. Through the scheme, the possibility of winding the wire harness in the rotating process of the rotor structure can be greatly reduced, and the use reliability of the motor is improved.

Wherein, the distance L between the two can be 3 mm-5 mm.

Among the above-mentioned technical scheme, the shape of circuit board is the disc, and signal receiver locates the center department of circuit board, and the center of circuit board is located the axis place straight line of mounting groove.

In this technical scheme, through selecting the circuit board of disc form, can set up signal receiver in the center department of circuit board to set up the center of circuit board in the axis department of mounting groove, signal receiver is located the axis of mounting groove and locates on the straight line promptly, guarantees the transmission of signal, and then can make the motor when rotating, separates the magnetic ring and can play better guard action to the signal transmission between position sensor and the signal receiver.

It can be understood that the circuit board is selected to be disc-shaped, so that the circuit board is more fit with the shape of the shell of the motor and is convenient to process and manufacture.

In the above technical solution, the position sensor specifically includes: a connecting housing connected to the rotor shaft; the magnetic part is arranged at one end, far away from the rotor shaft, of the connecting shell, and the magnetic part and the rotor shaft are coaxial.

In the technical scheme, the position sensor mainly comprises a connecting shell and a magnetic part, the connecting shell mainly plays a role of being connected with the rotor shaft, the magnetic part is arranged at the other end of the connecting shell, namely one end far away from the rotor shaft, and on the basis that the magnetic part and the rotor shaft are coaxially arranged, the magnetic part can continuously send magnetic signals to a signal receiver so as to conveniently determine the rotating position or the rotating angle of the rotor shaft, thereby realizing the functions of measuring the rotating speed or other electric control sensing.

The magnetic part can be in a sheet shape, one end of the magnetic part is an N pole, and the other end of the magnetic part is an S pole.

Among the above-mentioned technical scheme, signal receiver specifically includes magnetic rotary encoder, and magnetic rotary encoder and magnetic part mutual induction match.

In this technical scheme, signal receiver mainly includes magnetic rotary encoder, under magnetic rotary encoder's effect, can be in the rotatory in-process of rotor shaft, induces the change in magnetic field to can carry out the rotation measurement.

Among the above-mentioned technical scheme, the one end of connecting the casing towards the rotor shaft is equipped with the external screw thread, and the one end of rotor shaft orientation connection casing is equipped with the screw hole, connects casing and rotor shaft and passes through the cooperation realization threaded connection of external screw thread and screw hole.

In this technical scheme, to the cooperation between connecting casing and the rotor shaft, can adopt threaded connection, specifically, connect casing and rotor shaft interconnect's position, structural external screw thread that sets up of one, another structural screw hole that sets up to can realize the screw-thread fit of the two.

Among the above-mentioned technical scheme, the end cover body with separate magnetic ring integrated into one piece, be equipped with the spacing groove on the end cover body, separate the magnetic ring and be equipped with the anticreep arch towards the one end of end cover body, the anticreep arch is located the spacing inslot.

In this technical scheme, through with end cover body and the processing of magnetic ring integrated into one piece that separates, can process earlier the spacing groove when making the end cover body, set up the anticreep arch to the one end that separates the magnetic ring simultaneously, can place the anticreep arch in the spacing groove this moment, carry out integrated into one piece again to prevent to separate the droing of magnetic ring.

Furthermore, the limiting groove and the anti-falling protrusion extend along the radial direction, and axial anti-falling can be achieved after the anti-falling protrusion is located in the limiting groove.

It needs to supplement that, can realize through two processes when this internal formation spacing groove of end cover, wherein cast the main part earlier, place the magnetic isolation ring in inside again, at last will form an organic whole structure with the protruding partial refill casting that corresponds of anticreep.

It can be understood that although the end cover body and the magnetism isolating ring are integrally formed, the magnetism isolating ring still needs to be made of a magnetic conducting material, so that the normal magnetism isolating effect is ensured.

In the technical scheme, the magnetism isolating ring and the end cover body are of a split structure, and the magnetism isolating ring is connected to the mounting groove.

In the technical scheme, the magnetism isolating ring and the end cover body are in a split structure, so that the magnetism isolating ring and the end cover body can be installed and matched to realize connection. Specifically, the magnetism isolating ring and the mounting groove can be in interference fit, assembly is completed in a press-fitting mode, and connection between the magnetism isolating ring and the end cover body is guaranteed.

Of course, the connection can also be made by gluing.

It can be understood that the magnetic isolation ring and the end cover body which are of a split structure are adopted, the materials of the magnetic isolation ring and the end cover body can be the same or different, and only the magnetic isolation ring needs to be made of a magnetic conduction material.

In the above technical solution, further comprising: and the adhesive layer is arranged on the outer wall of the magnetism isolating ring and/or the inner wall of the mounting groove.

The adhesive layer is arranged on one or both of the outer wall of the magnetism isolating ring and the inner wall of the mounting groove, and the two can be fixed by using the viscosity of the adhesive. Specifically, the adhesive layer is circumferentially arranged on the outer wall of the magnetism isolating ring or can be circumferentially arranged on the inner wall of the mounting groove, so that when the magnetism isolating ring is mounted in the mounting groove, connection can be achieved under the action of the adhesive layer.

Further, the adhesive layer may be a solid adhesive or a liquid adhesive.

In the above technical solution, further comprising: two bearing blocks are arranged in the casing, the two bearing blocks are respectively arranged on two sides of the rotor structure, bearings are arranged in the bearing blocks, and the rotor shaft is arranged in the bearings in a penetrating mode.

Through set up two bearing frames in the casing, can play the effect of support in the both sides of rotor shaft, adopt the support of bearing can guarantee the rotation concentricity of rotor shaft, reduce the possibility that takes place radial float, improve rotational stability.

The embodiment of the second aspect of the utility model provides an electric power steering system, including the motor structure of above-mentioned first aspect embodiment, consequently the utility model provides an electric power steering system has all beneficial effects of the motor structure who provides among the above-mentioned arbitrary technical scheme.

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 (i.e., the electric power steering system) has many advantages compared to the conventional hydraulic power steering system (i.e., the HPS system).

Further, the EPS is mainly composed of a torque sensor, a vehicle speed sensor, a motor, a reduction mechanism, an electronic control unit, and the like.

An embodiment of the third aspect of the present invention provides a vehicle, including: a vehicle body; any one of the motor structures of the first aspect is provided in a vehicle body, or includes the electric power steering system of the second aspect, provided in a vehicle body.

According to the utility model provides a vehicle, including the automobile body and locate the interior motor structure of automobile body, the casing mainly plays certain guard action to motor structure, because is provided with motor structure in the automobile body, so has the beneficial effect of arbitrary motor structure in the above-mentioned first aspect embodiment, no longer gives unnecessary details here.

The motor structure in the vehicle can be used as a main driving structure, namely, an electric vehicle, and can also be used as a driving structure of other equipment in the vehicle, such as a fan, an electric power steering system and the like.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

Fig. 1 shows a schematic structural view of an end cap structure according to an embodiment of the present invention;

fig. 2 shows a schematic structural view of an end cap structure according to an embodiment of the present invention;

fig. 3 shows a schematic structural diagram of a circuit board according to an embodiment of the present invention;

fig. 4 shows a schematic structural view of an end cap structure according to an embodiment of the present invention;

fig. 5 shows a schematic structural view of an end cap body according to an embodiment of the present invention;

fig. 6 shows a schematic structural view of an end cap structure according to an embodiment of the present invention;

fig. 7 shows a schematic structural view of a motor structure according to an embodiment of the present invention;

fig. 8 shows a schematic structural diagram of an electric power steering system according to an embodiment of the present invention;

fig. 9 shows a schematic structural view of a vehicle according to an embodiment of the invention;

fig. 10 shows a schematic structural diagram of a vehicle according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 10 is:

102: an end cap body; 1022: a bearing groove; 1024: mounting grooves; 104: a circuit board; 106: a magnetism isolating ring; 1062: the anti-drop bulge; 108: a position sensing assembly; 1082: a position sensor; 1084: a signal receiver; 1086: connecting the shell; 1088: a magnetic member; 110: an adhesive layer; 200: a motor structure; 201: a housing; 202: a rotor structure; 2022: a rotor shaft; 204: a stator structure; 206: a bearing; 300: a vehicle; 302: a vehicle body; 400: an electric power steering system; 411: a steering wheel; 412: a steering shaft; 413: a universal coupling; 414: a rotating shaft; 415: a rack and pinion mechanism; 416: a rack shaft; 417: a wheel; 421: a steering torque sensor; 422: a control unit; 423: a speed reduction mechanism.

Detailed Description

In order to make the aforementioned objects, features and advantages of the embodiments of the present invention more clearly understood, embodiments of 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 application, however, embodiments of the present invention may be practiced otherwise than as specifically described herein, and the scope of protection is not limited by the specific embodiments disclosed below.

Some embodiments according to the invention are described below with reference to fig. 1 to 10.

Example one

As shown in fig. 3 and 7, the motor structure 200 according to the present embodiment includes a casing 201, and a rotor structure 202 and a stator structure 204 coaxially disposed in the casing 201, and as shown in fig. 1 and 2, an end cover body 102 and a circuit board 104 are further provided, where the end cover body 102 is mainly used for being matched with an end surface of a motor to implement assembly, and the circuit board 104 is disposed outside the motor structure 200 to implement control of operation of the motor. Specifically, in the present application, in order to resist magnetic leakage generated after the rotor structure 202 rotates relative to the stator structure 204, the magnetism isolating ring 106 is disposed in the mounting groove 1024 at the second end of the end cover body 102, and the magnetism isolating ring 106 made of a magnetic conductive material is used to weaken an axial magnetic field of the rotor structure 202, especially weaken the influence on signal transmission of some electronic components on the circuit board 104, thereby ensuring the reliability of the motor operation.

The first end of the end cap body 102 is an inner end, that is, an end facing the rotor structure 202, and a bearing groove 1022 is disposed in the hole, so that a bearing is disposed inward, thereby ensuring coaxiality of the rotor structure 202 during rotation, and simultaneously playing a certain limiting role for the rotor shaft.

The magnetism isolating ring 106 and the circuit board 104 are both arranged at the outer end of the end cover body 102, wherein the magnetism isolating ring 106 is arranged in the mounting groove 1024, different electric control elements, sensing elements and the like are arranged on the circuit board 104, the mounting groove 1024 is specially formed at the outer end of the end cover body 102, so that arrangement of different electric control elements is facilitated, namely, some elements needing to be placed at the axis for detection can be placed at the mounting groove 1024, and the rest parts can be placed at the outer end of the circuit board 104.

Further, the end cap body 102 may be made of an aluminum alloy material, and the magnetism isolating ring 106 may be made of a carbon steel material.

In a specific embodiment, the magnetism isolating ring 106 is a circumferentially complete ring structure.

In another specific embodiment, the magnetism isolating ring 106 is an annular structure formed by splicing a plurality of single bodies.

The rotor structure 202 is disposed inside the stator structure 204 to form the motor structure 200 of the inner rotor outer stator, and the rotor structure 202 may also be disposed outside the stator to form the motor structure 200 of the outer rotor inner stator. The motor structure 200 is disposed at one end of the casing 201, and the rotor shaft of the rotor structure 202 is inserted into the bearing groove 1022 directly, so as to support the rotation of the rotor shaft.

Example two

As shown in fig. 1, the motor structure 200 provided in this embodiment includes a casing 201, and a rotor structure 202 and a stator structure 204 coaxially disposed in the casing 201, and further includes an end cover body 102 and a circuit board 104, where the end cover body 102 is mainly used for being matched with an end face of a motor to implement assembly, and the circuit board 104 is disposed outside the motor structure 200 to implement control of operation of the motor. Specifically, in the present application, in order to resist magnetic leakage generated after the rotor structure 202 rotates relative to the stator structure 204, the magnetism isolating ring 106 is disposed in the mounting groove 1024 at the second end of the end cover body 102, and the magnetism isolating ring 106 made of a magnetic conductive material is used to weaken an axial magnetic field of the rotor structure 202, especially weaken the influence on signal transmission of some electronic components on the circuit board 104, thereby ensuring the reliability of the motor operation.

The first end of the end cap body 102 is an inner end, that is, an end facing the rotor structure 202, and a bearing groove 1022 is disposed in the hole, so that a bearing is disposed inward, thereby ensuring coaxiality of the rotor structure 202 during rotation, and simultaneously playing a certain limiting role for the rotor shaft.

The magnetism isolating ring 106 and the circuit board 104 are both arranged at the outer end of the end cover body 102, wherein the magnetism isolating ring 106 is arranged in the mounting groove 1024, different electric control elements, sensing elements and the like are arranged on the circuit board 104, the mounting groove 1024 is specially formed at the outer end of the end cover body 102, so that arrangement of different electric control elements is facilitated, namely, some elements needing to be placed at the axis for detection can be placed at the mounting groove 1024, and the rest parts can be placed at the outer end of the circuit board 104.

It should be added that the bearing slot 1022 and the mounting slot 1024 are connected, so that when the position sensing assembly 108 is disposed, the rotation signal generated by the rotor shaft can be better received, thereby facilitating the detection of the rotation position of the motor.

It should be emphasized that the position sensing assembly 108 is disposed radially inside the magnetism isolating ring 106, so that the interfering magnetic field generated by the rotation of the rotor structure 202 is weakened under the action of the magnetism isolating ring 106, and the acquisition and control of the operation parameters of the whole motor by the position sensing assembly 108 are ensured.

The position sensing assembly 108 is mainly used for detecting the rotation speed of the motor.

Further, as shown in fig. 4 and 7, the position sensing assembly 108 mainly includes a position sensor 1082 and a signal receiver 1084, wherein the position sensor 1082 is disposed in the mounting slot 1024, and can obtain parameters such as the rotation state of the rotor structure 202, and the signal receiver 1084 is disposed on the circuit board 104, specifically, on a side of the circuit board 104 facing the end cap body 102, so as to receive a signal emitted by the position sensor 1082.

It should be noted that, a part of the structure or the whole structure of the signal receiver 1084 is disposed in the mounting groove 1024, so that the normal transmission of the signal transmission path between the position sensor 1082 and the signal receiver 1084 can be ensured under the effect of the magnetism isolating ring 106, and the anti-interference capability is improved.

Wherein the position sensor 1082 is coupled to the rotor shaft.

By connecting the position sensor 1082 to the rotor shaft, which may be disposed at the end of the rotor shaft, a rotating magnetic field may be generated when the motor structure 200 is in operation, wherein a portion of the magnetic field may flow through the end cap to the circuit board 104, which interferes with the output signal of the sensor, resulting in abnormal operation or misoperation of the motor.

The signal receiver 1084 is a hall element, and receives a magnetic field signal of a position sensor 1082 mounted on the rotor of the motor, and sends the position signal to the ECU (i.e., the circuit board 104), so as to control the motor.

In one particular embodiment, the position sensor 1082 and the signal receiver 1084 are connected by a wire.

In another specific embodiment, position sensor 1082 is wirelessly coupled to signal receiver 1084.

The position sensor 1082 can emit a wireless signal corresponding to the rotational position of the rotor shaft, and the circuit board 104 is provided with a signal receiver 1084 spaced apart from the position sensor 1082, such that the signal receiver 1084 can transmit the sensing signal to the signal receiver 1084 without wires. Through the scheme, the possibility of winding the wire harness in the rotating process of the rotor structure 202 can be greatly reduced, and the use reliability of the motor is improved.

Wherein the distance between the two can be 3 mm-5 mm.

More specifically, in a specific embodiment, the position sensor mainly includes a connecting housing 1086 and a magnetic member 1088, the connecting housing 1086 mainly functions as a shaft connected to the rotor shaft, and the magnetic member 1088 is disposed at the other end of the connecting housing 1086, i.e., the end far away from the rotor shaft, and based on the coaxial arrangement of the magnetic member 1088 and the rotor shaft, a magnetic signal is continuously sent to the signal receiver, so as to determine the rotation position or rotation angle of the rotor shaft, thereby measuring the rotation speed or other electrically controlled sensing functions.

The magnetic member 1088 may be a sheet, one end of which is an N-pole and the other end of which is an S-pole.

The signal receiver mainly comprises a magnetic rotary encoder, and under the action of the magnetic rotary encoder, the signal receiver can sense the change of a magnetic field in the rotating process of the rotor shaft, so that the rotation measurement can be carried out.

Threaded connection can be adopted between connecting casing 1086 and the rotor shaft, specifically, the position of connecting casing 1086 and rotor shaft interconnect sets up the external screw thread on a structure, and the screw hole is set up on another structure to can realize the screw-thread fit of the two.

EXAMPLE III

The motor structure 200 provided by this embodiment includes a casing 201, and a rotor structure 202 and a stator structure 204 coaxially disposed in the casing 201, and is further provided with an end cover body 102 and a circuit board 104, where the end cover body 102 is mainly used for being matched with an end face of a motor to implement assembly, and the circuit board 104 is disposed outside the motor structure 200 to implement control of operation of the motor. Specifically, in the present application, in order to resist magnetic leakage generated after the rotor structure 202 rotates relative to the stator structure 204, the magnetism isolating ring 106 is disposed in the mounting groove 1024 at the second end of the end cover body 102, and the magnetism isolating ring 106 made of a magnetic conductive material is used to weaken an axial magnetic field of the rotor structure 202, especially weaken the influence on signal transmission of some electronic components on the circuit board 104, thereby ensuring the reliability of the motor operation.

In a specific embodiment, as shown in fig. 5, the end cap body 102 and the magnetism isolating ring 106 are integrally formed, a limit groove is firstly formed when the end cap body 102 is manufactured, and the anti-drop protrusion 1062 is disposed at one end of the magnetism isolating ring 106, at this time, the anti-drop protrusion 1062 is placed in the limit groove and then integrally formed, so as to prevent the magnetism isolating ring 106 from dropping off.

Further, the limiting groove and the anti-falling protrusion 1062 extend along the radial direction, and after the anti-falling protrusion 1062 is located in the limiting groove, axial anti-falling can be achieved.

It should be added that the forming of the limit groove in the end cap body 102 can be realized by two processes, wherein the main body is cast, the magnetism isolating ring 106 is placed inside, and finally the portion corresponding to the anti-dropping protrusion is cast again to form an integral structure.

It can be understood that although the end cap body 102 and the magnetism isolating ring 106 are integrally formed, the material of the magnetism isolating ring 106 still needs to be a magnetic conductive material, so as to ensure a normal magnetism isolating effect.

In another specific embodiment, the magnetism isolating ring 106 and the end cap body 102 are selected to be a split structure, and the magnetism isolating ring 106 and the end cap body 102 can be installed and matched, so that connection is achieved. Specifically, the magnetism isolating ring 106 and the mounting groove 1024 are in interference fit, and the assembly is completed in a press-fitting mode, so that the connection between the magnetism isolating ring 106 and the end cover body 102 is ensured.

It can be understood that the material of the magnetism isolating ring 106 and the end cover body 102 in the split structure may be the same or different, and it is only necessary to ensure that the magnetism isolating ring 106 is made of a magnetic conductive material.

In another embodiment, as shown in fig. 6, the fixing of the magnetism isolating ring 106 and the mounting groove 1024 can be achieved by the adhesive layer 110 disposed on one or both of the outer wall and the inner wall. Specifically, the adhesive layer 110 is circumferentially disposed on an outer wall of the magnetism isolating ring 106, or may be circumferentially disposed on an inner wall of the mounting groove 1024, so that when the magnetism isolating ring 106 is mounted in the mounting groove 1024, connection can be achieved under the action of the adhesive layer 110.

Further, the adhesive layer 110 may be a solid adhesive or a liquid adhesive.

As shown in fig. 7, two bearing seats may be further disposed in the casing 201, and the bearings 206 are disposed in the bearing seats respectively, so that the two sides of the rotor shaft can support the rotor shaft, and the support of the bearings 206 can ensure the rotation concentricity of the rotor shaft, reduce the possibility of radial play, and improve the rotation stability.

Example four

As shown in fig. 8, the present embodiment provides an electric power steering system 400, which includes the motor structure 200 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 structure 200 provided by 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 structure 200 to provide auxiliary torque Power, and compared with the conventional Hydraulic Power Steering system 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 many possible ways is specifically described below. Specifically, in one implementable manner, the EPS system has 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 the driver operating the 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 rotating shaft 414, a rack and pinion mechanism 415, a rack shaft 416, wheels 417 for left-right steering, 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.

EXAMPLE five

As shown in fig. 9, a vehicle 300 according to this embodiment includes a vehicle body 302 and a motor structure 200 disposed in the vehicle body 302, where the vehicle body 302 mainly protects the motor structure 200 to a certain extent, and since the motor structure 200 is disposed in the vehicle body 302, the vehicle 300 has the beneficial effects of any one of the motor structures in the second embodiment, and details are not repeated here.

The motor structure in the vehicle can be used as a main driving structure, namely, an electric vehicle, and can also be used as a driving structure of other equipment in the vehicle, such as a fan and the like.

Of course, as shown in fig. 10, the motor structure 200 may be used to drive the electric power steering system 400 to achieve steering of the vehicle 300.

According to the utility model provides a motor structure, electric power steering system and vehicle through the magnetic ring that separates that adopts magnetic materials, can weaken rotor structure's axial magnetic field to guarantee the reliability of motor operation.

In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited 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; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means 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 is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to 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 (14)

1. An electric machine construction, comprising:

the motor comprises a machine shell, wherein a stator structure and a rotor structure are arranged in the machine shell, the rotor structure comprises a rotor shaft, a stator winding is arranged on the stator structure, the stator winding is formed by at least one winding wire with a winding wire end part, the winding wire end part is electrically contacted with a wiring terminal of a bus bar structure at the end part, the bus bar structure is arranged at one end of the stator structure, and the stator winding is led out outwards by being arranged on the bus bar structure;

the end cover body is arranged at one end of the shell, a bearing groove is formed in the first end of the end cover body, an installation groove is formed in the second end of the end cover body, and one end, facing the end cover body, of the rotor shaft extends into the bearing groove;

the circuit board is arranged at the second end of the end cover body;

and the magnetism isolating ring is arranged in the mounting groove and is made of a magnetic conducting material.

2. The motor structure according to claim 1, wherein a groove bottom of the bearing groove communicates with a groove bottom of the mounting groove, the motor structure further comprising:

and the position sensing assembly is arranged on the radial inner side of the magnetism isolating ring.

3. The machine structure according to claim 2, characterized in that said position sensing assembly comprises in particular:

the position sensor is arranged in the mounting groove and is connected with the rotor shaft;

the signal receiver is arranged on one side, facing the end cover body, of the circuit board and is used for receiving sensing signals sent by the position sensor;

wherein at least part of the signal receiver is positioned in the mounting groove.

4. A motor construction according to claim 3, characterised in that there is a gap between the position sensor and the signal receiver, and that the sensor signal is a wireless signal.

5. The motor structure according to claim 3, wherein the circuit board is shaped like a circular disc, the signal receiver is disposed at the center of the circuit board, and the center of the circuit board is located on a straight line of the axis of the mounting groove.

6. The electric machine structure according to claim 3, characterized in that the position sensor comprises in particular:

a connection housing connected to the rotor shaft;

the magnetic part is arranged at one end, far away from the rotor shaft, of the connecting shell, and the magnetic part and the rotor shaft are coaxial.

7. The electric machine structure according to claim 6, characterized in that said signal receiver comprises in particular a magnetic rotary encoder cooperating with said magnetic element in an inductive manner.

8. The motor structure according to claim 6, wherein the connecting housing has an external thread at an end facing the rotor shaft, the rotor shaft has a threaded hole at an end facing the connecting housing, and the connecting housing and the rotor shaft are threadedly connected by the external thread and the threaded hole.

9. The motor structure as claimed in any one of claims 1 to 8, wherein the end cap body is integrally formed with the magnetism isolating ring, a limit groove is formed on the end cap body, and an anti-drop protrusion is formed at an end of the magnetism isolating ring facing the end cap body and located in the limit groove.

10. The electric machine structure according to any one of claims 1 to 8, wherein the magnetism isolating ring and the end cap body are separate structures, and the magnetism isolating ring is connected to the mounting groove.

11. The electric machine structure according to any one of claims 1 to 8, further comprising:

and the adhesive layer is arranged on the outer wall of the magnetism isolating ring and/or the inner wall of the mounting groove.

12. The electric machine structure according to any one of claims 1 to 8, further comprising:

the two bearing blocks are arranged in the shell, the two bearing blocks are respectively arranged on two sides of the rotor structure, a bearing is arranged in each bearing block, and the rotor shaft is arranged in the bearing in a penetrating mode.

13. An electric power steering system, characterized by comprising an electric motor structure according to any one of claims 1 to 12.

14. A vehicle, characterized by comprising:

a vehicle body;

the motor structure according to any one of claims 1 to 12, provided in the vehicle body; or

The electric power steering system according to claim 13, provided in the vehicle body.

Images