Rotor and machining method thereof

Abstract

The present invention provides a rotor and a processing method thereof, wherein the rotor includes a rotor house and a magnetic pole module, wherein the rotor house is provided with a plurality of mounting grooves extending along the axial direction of the rotor, wherein the mounting grooves are formed by milling on the rotor house, and the magnetic pole module is installed in the mounting grooves, wherein the two ends of the mounting groove along the axial direction of the rotor are respectively a notch end and a limit end, wherein the notch end is an open end and the limit end is a closed end, and the limit end has a limit surface, wherein the limit surface is perpendicular to the axis of the rotor, and the magnetic pole module abuts against the limit surface on one side of the rotor facing the limit end in the axial direction. A limit surface is processed at the limit end of the mounting groove, and the limit surface is a plane along the circumference of the rotor, thereby realizing direct surface contact between the limit end and the magnetic pole module, ensuring that the magnetic pole module is not easy to slip out of the mounting groove when the rotor is in working state, thereby improving the safety of the rotor operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of motors, and in particular relates to a rotor and a processing method thereof. Background Art

[0002] The motor consists of a stator and a rotor. The stator is a fixed component in the motor, and the rotor is a rotating component in the motor. In order to achieve magnetic field correlation, a mounting slot is usually opened on the rotor housing of the rotor, and a magnetic pole module is installed in the mounting slot. The mounting slot includes a slot end and a limit end. The magnetic pole module enters from the slot end and is limited and fixed by the limit end. The shape of the magnetic pole module is usually a rectangular parallelepiped. Along the axial direction of the rotor, the surface of the magnetic pole module facing the limit end and perpendicular to the axis of the rotor is a plane. Currently, there are two main types of mounting slots:

[0003] The first form is that the slot end of the mounting slot is open and the limit end is closed. Since the tool used for slotting is disc-shaped, the end face of the limit end and the two sidewalls of the mounting slot along the rotor axis are transitioned through an arc surface, and in theory the arc surface can only become smaller and smaller and cannot be eliminated. The existence of the arc surface leads to two problems: first, the smaller the arc surface, the smaller the tool required, and thus the higher the processing cost; second, the side of the magnetic pole module facing the limit end is generally a plane, and due to the existence of the arc surface, it is necessary to add a transition element between the side of the magnetic pole module facing the limit end and the arc surface in order to make the side indirectly cooperate with the arc surface, and then install the magnetic pole module in the mounting slot, or without adding a transition element to make the side directly cooperate with the original arc surface, then there is line contact between the side and the arc surface, and the fixing effect of the magnetic pole module in this type of installation method is poor.

[0004] The second form is that the slot end and the limit end of the installation slot are both open. After the magnetic pole module is installed, a fixing piece is installed at the limit end of the installation slot to seal the limit end and fix the magnetic pole module. This method has a complex structure and many operating steps, which reduces assembly efficiency and increases assembly costs. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects in the prior art that the magnetic pole module of the rotor is fixed at the limiting end of the installation groove without additional fixing parts, and the direct surface contact between the magnetic pole module and the limiting end cannot be achieved, and the installation firmness is poor, and provide a rotor and a processing method thereof.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] A rotor comprises a rotor house and a magnetic pole module, wherein the rotor house is provided with a plurality of mounting slots extending along the axial direction of the rotor, the mounting slots being formed by milling on the rotor house, the magnetic pole module being installed in the mounting slots, the two ends of the mounting slot along the axial direction of the rotor being respectively a slot end and a limit end, the slot end being an open end, the limit end being a closed end, the limit end having a limit surface, the limit surface being perpendicular to the axis of the rotor, the magnetic pole module abutting against the limit surface on one side of the limit end in the axial direction of the rotor.

[0008] In this solution, a limiting surface is processed at the limiting end of the mounting groove. The limiting surface is a plane along the circumference of the rotor, and abuts against the side of the magnetic pole module facing the limiting end in the axial direction of the rotor, thereby realizing direct surface contact between the limiting end and the magnetic pole module. This changes the traditional mode in which a transition element needs to be installed between the limiting end and the magnetic pole module to achieve surface contact, thereby improving the stability of the installation of the magnetic pole module, ensuring that the magnetic pole module is not easy to slip out of the mounting groove when the rotor is in working condition, and improving the safety of the rotor operation.

[0009] Preferably, the mounting slot includes:

[0010] A mounting groove body, wherein two sidewall surfaces of the mounting groove body along the circumference of the rotor and an end surface of the mounting groove body close to the limiting end along the axial direction of the rotor are transitioned through arc surfaces;

[0011] Two first protrusions, one located on either side of the mounting slot body along the circumferential direction of the rotor, the first protrusions being grooves machined on the rotor housing. The first protrusions extend from the interior of the mounting slot body along the circumferential direction of the rotor toward the exterior of corresponding sides of the mounting slot body, and cut at least one end of the arc surface for connection with the sidewall surface of the mounting slot body.

[0012] In which, the depth of the first protrusion along the radial direction of the rotor is greater than or equal to the depth of the mounting slot body along the radial direction of the rotor, the length of the first protrusion along the axial direction of the rotor is less than the length of the magnetic pole module along the axial direction of the rotor, and the end face of the first protrusion along the axial direction of the rotor close to the limit end forms at least part of the limit surface.

[0013] In this embodiment, since the mounting slot is generally machined using a disc-shaped tool, the limiting end of the mounting slot body after machining by the tool comprises a planar end face and arcuate transition sections on either side of the end face, or the limiting end comprises a single arcuate surface. A first protrusion is provided on each of the two side faces of the mounting slot body along the rotor circumference. While machining the first protrusion, the arcuate surface is at least partially cut. This allows the magnetic pole module to continue to move along the rotor's axial direction toward the limiting end. After at least a portion of the arcuate surface is cut, the rotor housing forms a planar surface along the rotor's circumference, i.e., a limiting surface. In other words, the first protrusion's end face, located along the rotor's axial direction and close to the limiting end, forms at least a portion of the limiting surface. The depth of the first protrusion along the radial direction of the rotor is greater than or equal to the depth of the mounting slot body along the radial direction of the rotor, ensuring that the magnetic pole module can move to the limit end of the mounting slot body and abut against the limit surface. This avoids the situation where the depth of the first protrusion along the radial direction of the rotor is less than the depth of the mounting slot body along the radial direction of the rotor, resulting in the bottom surface of the first protrusion being higher than the bottom surface of the mounting slot body, causing the magnetic pole module to be limited by the bottom surface of the first protrusion, resulting in unreliable installation of the magnetic pole module. The length of the first protrusion along the axial direction of the rotor is less than the length of the magnetic pole module along the axial direction of the rotor, ensuring that when the magnetic pole module moves to the side of the limit end of the mounting slot body, it will not move along the circumference of the rotor to the first protrusion, causing the magnetic pole module to be misaligned or even out of the mounting slot.

[0014] Preferably, along the axial direction of the rotor, the end surface of the first protrusion close to the limiting end is flush with the position of the installation slot body farthest from the slot end, and the first protrusion completely cuts the arc surface.

[0015] In this solution, when the end face of the limiting end is a plane, the arc surface is completely cut during processing, and the end face of the first protrusion close to the limiting end is flush with the end face of the mounting slot body close to the limiting end along the axial direction of the rotor, forming a limiting surface that can completely abut against the side face of the magnetic pole module facing the limiting end in the axial direction of the rotor; when the end face of the limiting end is an arc surface, the arc surface is completely cut, and the end face of the first protrusion close to the limiting end forms a limiting surface that can completely abut against the side face of the magnetic pole module facing the limiting end in the axial direction of the rotor.

[0016] Preferably, the two first protrusions located on the sides of the adjacent mounting grooves facing each other are connected to each other.

[0017] In this solution, the two first protrusions on the adjacent mounting grooves facing each other are connected to each other, which makes it convenient for the tool to move from the mounting groove to the adjacent mounting groove for subsequent processing during processing, avoiding the step of moving the tool out of the mounting groove and then into the adjacent mounting groove when the two first protrusions on the adjacent mounting grooves facing each other are not connected, greatly shortening the tool movement path, thereby improving processing efficiency.

[0018] Preferably, the mounting slot includes:

[0019] A mounting groove body, wherein two sidewall surfaces of the mounting groove body along the circumference of the rotor and an end surface of the mounting groove body close to the limiting end along the axial direction of the rotor are transitioned through arc surfaces;

[0020] Two second protrusions, one located on either side of the mounting slot body along the circumferential direction of the rotor, the second protrusions being grooves machined on the rotor housing, the second protrusions extending along the sidewall surface of the mounting slot body in the axial direction of the rotor and extending beyond an end surface of the mounting slot body along the axial direction of the rotor close to the limit end;

[0021] The depth of the second protrusion along the radial direction of the rotor is greater than or equal to the depth of the mounting slot body along the radial direction of the rotor, the sum of the widths of the two second protrusions in the circumferential direction of the rotor is less than the distance between the two side wall surfaces of the mounting slot body, and the end surface of the mounting slot body located between the two second protrusions along the axial direction of the rotor close to the limit end forms the limit surface.

[0022] In this embodiment, since the mounting groove is generally machined by a tool, and the tool is disc-shaped, the limiting end of the mounting groove body after machining by the tool includes a planar end face and arc-shaped transition sections on both sides of the end face, or the limiting end is an arc surface. Second protrusions are respectively provided on the two side faces of the mounting groove body along the circumference of the rotor. The second protrusions extend along the sidewall of the mounting groove body in the axial direction of the rotor and extend beyond the end face of the mounting groove body along the axial direction of the rotor close to the limiting end. When the end face of the mounting groove body along the axial direction of the rotor close to the limiting end is a plane, the plane is the limiting surface. When the end face of the mounting groove body along the axial direction of the rotor close to the limiting end is an arc surface, the arc surface is completely cut by the tool along the circumference of the rotor to form a new plane, which is the limiting surface. In other words, the end face of the mounting groove body along the axial direction of the rotor close to the limiting end located between the two second protrusions forms the limiting surface. The radial depth of the second protrusion along the rotor is greater than or equal to the radial depth of the mounting slot body along the rotor, ensuring that the magnetic pole module can move to the limiting end of the mounting slot body and abut against the limiting surface. This avoids the situation where the radial depth of the second protrusion along the rotor is less than the radial depth of the mounting slot body along the rotor, resulting in the bottom surface of the second protrusion being higher than the bottom surface of the mounting slot body, causing the magnetic pole module to be limited by the bottom surface of the second protrusion, resulting in unreliable installation of the magnetic pole module. The sum of the circumferential widths of the two second protrusions in the rotor is less than the distance between the two sidewalls of the mounting slot body, ensuring that the two second protrusions have a certain distance in the circumferential direction of the rotor, thereby leaving space for the setting of the limiting surface between the two second protrusions.

[0023] A rotor processing method is used to process the rotor as described above, comprising the following steps:

[0024] Step S1, using a tool to form a mounting groove body on the rotor housing, wherein two sidewall surfaces of the mounting groove body along the circumference of the rotor and an end surface of the mounting groove body close to the limiting end along the axial direction of the rotor are transitioned through arc surfaces;

[0025] Step S2: After the installation slot body is processed, the tool is moved into the installation slot body and close to the limit end;

[0026] Step S3: driving a tool to cut the rotor housing from the inside of the mounting slot body along the circumference of the rotor toward the outside of both sides of the mounting slot body to form a first protrusion, wherein the tool at least cuts one end of the arc surface for connection with the side wall surface of the mounting slot body.

[0027] In this embodiment, since the mounting slot is machined using a disc-shaped tool, the limiting end of the mounting slot body after machining by the tool comprises a planar end surface and arcuate transition sections on either side of the end surface, or the limiting end comprises a single arcuate surface. A first protrusion is machined on each of the two side surfaces of the mounting slot body along the rotor circumference. While machining the first protrusion, the arcuate surface is at least partially cut, so that at least a portion of the arcuate surface forms a planar surface along the rotor circumference, i.e., the limiting surface. In other words, the end surface of the first protrusion, located near the limiting end along the rotor axial direction, forms at least a portion of the limiting surface. A limiting surface is processed at the limiting end of the mounting slot. The limiting surface is a plane along the circumference of the rotor, and abuts against the side of the magnetic pole module facing the limiting end in the axial direction of the rotor, thereby realizing direct surface contact between the limiting end and the magnetic pole module. This changes the traditional mode in which a transition element needs to be installed between the limiting end and the magnetic pole module to achieve surface contact, thereby improving the stability of the installation of the magnetic pole module, ensuring that the magnetic pole module is not easy to slip out of the mounting slot when the rotor is in working condition, and improving the safety of the rotor operation.

[0028] Preferably, when the end surface of the mounting groove body close to the limit end along the axial direction of the rotor is a plane, step S21 is further included between step S2 and step S3: moving the tool along the axial direction of the rotor until the tool abuts against the end surface of the mounting groove body close to the limit end along the axial direction of the rotor;

[0029] In step S3, the tool completely cuts the arc surface;

[0030] The end surface of the first protrusion close to the limiting end along the axial direction of the rotor and the end surface of the installation slot body close to the limiting end along the axial direction of the rotor jointly form the limiting surface.

[0031] In this solution, the end face of the mounting slot body close to the limit end along the axial direction of the rotor is a plane, and the arc surface is completely cut during processing. The end face of the first protrusion close to the limit end is flush with the end face of the mounting slot body close to the limit end along the axial direction of the rotor, forming a limit surface that can completely abut against the side face of the magnetic pole module facing the limit end in the axial direction of the rotor. The abutment area is large, which ensures the firmness of the installation of the magnetic pole module.

[0032] Preferably, when the end surface of the installation slot body close to the limiting end along the axial direction of the rotor is an arc surface, the step S21 is further included between the step S2 and the step S3: driving the tool to continue cutting the rotor housing along the axial direction of the rotor until the tool is flush with the position of the installation slot body farthest from the slot end;

[0033] In step S3, the tool completely cuts the arc surface;

[0034] The end surface of the first protrusion close to the limiting end along the axial direction of the rotor forms the limiting surface.

[0035] In this solution, the end face of the mounting slot body along the axial direction of the rotor close to the limit end is an arc surface, which is completely cut, and the end face of the first protrusion close to the limit end forms a limit surface that can completely abut against the side face of the magnetic pole module in the axial direction of the rotor facing the limit end. The abutment area is large, which ensures the firmness of the installation of the magnetic pole module.

[0036] Preferably, in step S3 : the tool is driven to continuously cut the rotor housing along the circumference of the rotor until the tool is moved into another adjacent mounting slot body.

[0037] In this solution, the tool is moved from the mounting groove to the adjacent mounting groove for processing and subsequent processing, avoiding the step of moving the tool out of the mounting groove and then moving it into the adjacent mounting groove when the two first protrusions on one side of the adjacent mounting grooves are not connected to each other, greatly shortening the tool movement path, thereby improving processing efficiency.

[0038] Preferably, in step S3 : the tool is driven to continuously cut the rotor housing along the circumference of the rotor until the tool is moved into the same mounting slot body again.

[0039] In this solution, the tool moves along the circumference of the rotor at the position of the first protrusion for one circle, presenting the first protrusion of each mounting groove in the form of a connecting groove, which greatly shortens the tool movement path and thus improves processing efficiency.

[0040] A rotor processing method is used to process the rotor as described above, comprising the following steps:

[0041] Step S1, using a tool to form a mounting groove body on the rotor housing, wherein two sidewall surfaces of the mounting groove body along the circumference of the rotor and an end surface of the mounting groove body close to the limiting end along the axial direction of the rotor are transitioned through arc surfaces;

[0042] Step S2: After the installation slot body is processed, the tool is moved into the installation slot body and close to the limit end;

[0043] Step S3: driving a cutting tool to abut against a side wall of the mounting slot body and cutting the rotor housing along the axial direction of the rotor toward the exterior of the mounting slot body near the limiting end to form a second protrusion, with the cutting tool cutting beyond the end surface of the mounting slot body along the axial direction of the rotor near the limiting end;

[0044] Step S4: repeat step S3 on the other side of the mounting slot body along the circumference of the rotor.

[0045] In this solution, since the mounting groove is machined by a tool, and the tool is disc-shaped, the limiting end of the mounting groove body after machining by the tool includes a flat end face and transition sections in the form of arc surfaces on both sides of the end face, or the limiting end is a circular arc surface. Second protrusions are machined on the two side faces of the mounting groove body along the circumference of the rotor, respectively. The second protrusions extend along the sidewalls of the mounting groove body in the axial direction of the rotor and extend beyond the end face of the mounting groove body along the axial direction of the rotor close to the limiting end. When the end face of the mounting groove body along the axial direction of the rotor close to the limiting end is a plane, the plane is the limiting surface. When the end face of the mounting groove body along the axial direction of the rotor close to the limiting end is a circular arc surface, the circular arc surface is completely cut by the tool along the circumference of the rotor to form a new plane, which is the limiting surface. In other words, the end face of the mounting groove body along the axial direction of the rotor close to the limiting end located between the two second protrusions forms the limiting surface. A limiting surface is processed at the limiting end of the mounting slot. The limiting surface is a plane along the circumference of the rotor, and abuts against the side of the magnetic pole module facing the limiting end in the axial direction of the rotor, thereby realizing direct surface contact between the limiting end and the magnetic pole module. This changes the traditional mode in which a transition element needs to be installed between the limiting end and the magnetic pole module to achieve surface contact, thereby improving the stability of the installation of the magnetic pole module, ensuring that the magnetic pole module is not easy to slip out of the mounting slot when the rotor is in working condition, and improving the safety of the rotor operation.

[0046] Preferably, when the end surface of the mounting slot body along the axial direction of the rotor close to the limit end is an arc surface, step S31 is further included between step S3 and step S4: after cutting one of the second protrusions, driving the tool to move along the axial direction of the rotor toward the slot end until the tool is flush with the position of the mounting slot body farthest from the slot end, and driving the tool to cut the rotor house along the circumference of the rotor until the tool abuts against the other side wall of the mounting slot body.

[0047] When the end face of the mounting slot body along the rotor axis close to the limit end is an arc surface, the arc surface is partially cut by the tool on both sides along the rotor circumference to form two second protrusions, and the middle part of the two second protrusions is still an arc surface. At this time, it is necessary to drive the tool to completely cut the middle part of the two second protrusions along the rotor circumference to form a new plane, which is the limit surface.

[0048] The positive progress effect of the present invention is:

[0049] A limiting surface is processed at the limiting end of the mounting slot. The limiting surface is a plane along the circumference of the rotor, and abuts against the side of the magnetic pole module facing the limiting end in the axial direction of the rotor, thereby realizing direct surface contact between the limiting end and the magnetic pole module. This changes the traditional mode in which a transition element needs to be installed between the limiting end and the magnetic pole module to achieve surface contact, thereby improving the stability of the installation of the magnetic pole module, ensuring that the magnetic pole module is not easy to slip out of the mounting slot when the rotor is in working condition, and improving the safety of the rotor operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a three-dimensional structural diagram of the rotor of Example 1 of the present invention.

[0051] Figure 2 This is a top view of the rotor of Example 1 of the present invention.

[0052] Figure 3 for Figure 2 Middle AA section view.

[0053] Figure 4 This is a three-dimensional structural diagram of the rotor of Example 2 of the present invention.

[0054] Figure 5 This is a top view of the rotor of embodiment 2 of the present invention.

[0055] Figure 6 for Figure 5 Middle BB cross-section.

[0056] Figure 7 This is a three-dimensional structural diagram of the rotor of Example 3 of the present invention.

[0057] Figure 8 This is a top view of the rotor of embodiment 3 of the present invention.

[0058] Figure 9 for Figure 8 Cross-section of the middle CC.

[0059] Figure 10 This is a flowchart of Example 4 of the present invention.

[0060] Figure 11 This is a flowchart of Example 5 of the present invention.

[0061] Figure 12 This is a flowchart of Example 6 of the present invention.

[0062] Description of reference numerals:

[0063] Rotor House 100

[0064] Mounting slot 1

[0065] Notch end 11

[0066] Limit end 12

[0067] Limiting surface 121

[0068] Arc surface 122

[0069] Mounting slot body 13

[0070] First protrusion 14

[0071] Second protrusion 15

[0072] Magnetic pole module 2 DETAILED DESCRIPTION

[0073] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0074] Example 1

[0075] like Figures 1 to 3 As shown, a rotor includes a rotor housing 100 and a magnetic pole module 2. The rotor housing 100 is provided with a plurality of mounting slots 1 extending along the axial direction of the rotor. The mounting slots 1 are formed by milling on the rotor housing 100. The magnetic pole module 2 is installed in the mounting slots 1. The two ends of the mounting slot 1 along the axial direction of the rotor are respectively a slot end 11 and a limit end 12. The slot end 11 is an open end, and the limit end 12 is a closed end. The limit end 12 has a limit surface 121. The limit surface 121 is perpendicular to the axis of the rotor. The magnetic pole module 2 abuts against the limit surface 121 on one side facing the limit end 12 in the axial direction of the rotor.

[0076] A limiting surface 121 is processed at the limiting end 12 of the mounting groove 1. The limiting surface 121 is a plane along the circumference of the rotor, and abuts against the side of the magnetic pole module 2 facing the limiting end 12 in the axial direction of the rotor, thereby realizing direct surface contact between the limiting end 12 and the magnetic pole module 2. This changes the traditional mode in which a transition element needs to be installed between the limiting end 12 and the magnetic pole module 2 to achieve surface contact, thereby improving the installation stability of the magnetic pole module 2, ensuring that the magnetic pole module is not easy to slip out of the mounting groove 1 when the rotor is in working condition, and improving the safety of the rotor operation.

[0077] In this embodiment, the mounting groove 1 includes a mounting groove body 13 and two first protrusions 14. The two side wall surfaces of the mounting groove body 13 along the circumference of the rotor and the end surface close to the limit end 12 along the axial direction of the rotor are transitioned through arc surfaces. Since the mounting groove 1 is generally processed by a tool, and the tool is disc-shaped, the limit end 12 of the mounting groove body 13 after tool processing includes a planar end face and transition sections in the form of arc surfaces on both sides of the end face, or the limit end 12 is an arc surface.

[0078] In this embodiment, the two first protrusions 14 are respectively located on both sides of the mounting slot body 13 along the circumferential direction of the rotor. The first protrusions 14 are grooves machined and formed on the rotor housing 100. The first protrusions 14 extend from the inside of the mounting slot body 13 along the circumferential direction of the rotor to the outside of the corresponding side of the mounting slot body 13. Along the axial direction of the rotor, the end surface of the first protrusion 14 close to the limit end 12 is flush with the position of the mounting slot body 13 farthest from the slot end 11, and the first protrusion 14 completely cuts the arc surface. When the end face of the limiting end 12 is a plane, the arc surface is completely cut during processing, and the end face of the first protrusion 14 close to the limiting end 12 is flush with the end face of the limiting end 12, forming a limiting surface 121 that can completely abut against the side face of the magnetic pole module 2 in the axial direction of the rotor facing the limiting end 12; when the end face of the limiting end 12 is an arc surface, the arc surface is completely cut, and the end face of the first protrusion 14 close to the limiting end 12 forms a limiting surface 121 that can completely abut against the side face of the magnetic pole module 2 in the axial direction of the rotor facing the limiting end 12.

[0079] In this embodiment, the depth of the first protrusion 14 along the radial direction of the rotor is greater than or equal to the depth of the mounting slot body 13 along the radial direction of the rotor, ensuring that the magnetic pole module 2 can move to the limit end 12 of the mounting slot body 13 and abut against the limit surface 121, avoiding the situation where the depth of the first protrusion 14 along the radial direction of the rotor is less than the depth of the mounting slot body 13 along the radial direction of the rotor, the groove bottom surface of the first protrusion 14 is higher than the groove bottom surface of the mounting slot body 13, so that the magnetic pole module 2 is limited by the groove bottom surface of the first protrusion 14, resulting in unreliable installation of the magnetic pole module 2; the length of the first protrusion 14 along the axial direction of the rotor is less than the length of the magnetic pole module 2 along the axial direction of the rotor, ensuring that when the magnetic pole module 2 moves to the side of the limit end 12 of the mounting slot body 13, it will not move along the circumference of the rotor to the first protrusion 14, causing the magnetic pole module 2 to be dislocated or even detached from the mounting slot 1.

[0080] In other embodiments, the first protrusion 14 can cut an arc surface for one end to be connected to the side wall surface of the mounting slot body 13. While processing the first protrusion 14, the arc surface is partially cut so that the partial arc surface forms a plane along the circumference of the rotor after being cut, that is, the limiting surface 121. In other words, the end face of the first protrusion 14 along the axial direction of the rotor close to the limiting end 12 forms a partial limiting surface 121.

[0081] Example 2

[0082] The rotor in this embodiment is substantially the same as that in embodiment 1, except that: in this embodiment, two first protrusions 14 located on mutually facing sides of adjacent mounting slots 1 are connected to each other.

[0083] like Figures 4 to 6 As shown, during processing, the tool is moved from the mounting groove 1 to the adjacent mounting groove 1 for subsequent processing, so that the two first protrusions 14 located on the side of the adjacent mounting grooves 1 facing each other are connected to each other, avoiding the step of moving the tool out of the mounting groove 1 and then moving it into the adjacent mounting groove 1 when the two first protrusions 14 on the side of the adjacent mounting grooves 1 facing each other are not connected, greatly shortening the tool movement path, thereby improving processing efficiency.

[0084] Example 3

[0085] The rotor in this embodiment is substantially the same as that in the first embodiment, except that this embodiment does not have the first protrusion 14 but has the second protrusion 15 arranged along the axial direction of the rotor.

[0086] like Figures 7 to 9 As shown, in this embodiment, the mounting groove 1 includes a mounting groove body 13 and two second protrusions 15. The two side wall surfaces of the mounting groove body 13 along the circumference of the rotor and the end surface close to the limit end 12 along the axial direction of the rotor are transitioned through arc surfaces. Since the mounting groove 1 is generally processed by a tool, and the tool is disc-shaped, the limit end 12 of the mounting groove body 13 after tool processing includes a plane end face and arc-shaped transition sections on both sides of the end face, or the limit end 12 is an arc surface.

[0087] The two second protrusions 15 are respectively located on both sides of the mounting slot body 13 along the circumferential direction of the rotor. The second protrusions 15 are grooves machined on the rotor house 100. The second protrusions 15 extend along the side wall surface of the mounting slot body 13 in the axial direction of the rotor and exceed the end surface of the mounting slot body 13 along the axial direction of the rotor close to the limit end 12. When the end surface of the mounting slot body 13 along the axial direction of the rotor close to the limit end 12 is a plane, the plane is the limit surface 121; when the end surface of the mounting slot body 13 along the axial direction of the rotor close to the limit end 12 is an arc surface, the arc surface is completely cut by the tool along the circumferential direction of the rotor to form a new plane, which is the limit surface 121. In other words, the end surface of the mounting slot body 13 along the axial direction of the rotor close to the limit end 12 located between the two second protrusions 15 forms the limit surface 121.

[0088] In this embodiment, the depth of the second protrusion 15 along the radial direction of the rotor is greater than or equal to the depth of the mounting slot body 13 along the radial direction of the rotor, ensuring that the magnetic pole module 2 can move to the limiting end 12 of the mounting slot body 13 and abut against the limiting surface 121. This avoids the situation where the groove bottom surface of the second protrusion 15 is higher than the groove bottom surface of the mounting slot body 13 when the radial depth of the second protrusion 15 along the rotor is less than the radial depth of the mounting slot body 13 along the rotor, causing the magnetic pole module 2 to be limited by the groove bottom surface of the second protrusion 15, resulting in unreliable installation of the magnetic pole module 2. The sum of the widths of the two second protrusions 15 in the circumferential direction of the rotor is less than the distance between the two sidewalls of the mounting slot body 13, ensuring that the two second protrusions 15 have a certain distance in the circumferential direction of the rotor, thereby leaving space for the setting of the limiting surface 121 between the two second protrusions 15.

[0089] Example 4

[0090] like Figure 10 As shown, this embodiment discloses a rotor processing method for processing the rotor described in Example 1, comprising the following steps:

[0091] Step S1: Using a tool to form a mounting groove body 13 on the rotor housing 100, the mounting groove body 13 has two sidewall surfaces along the circumference of the rotor and an end surface along the axial direction of the rotor close to the limiting end 12 transitioned through arc surfaces;

[0092] Step S2: After the installation slot body 13 is processed, the tool is moved into the installation slot body 13 and close to the limit end 12;

[0093] Step S3: Drive a tool to cut the rotor housing 100 from the inside of the mounting slot body 13 along the circumference of the rotor toward the outside of both sides of the mounting slot body 13 to form a first protrusion 14. The tool cuts at least one end of the arc surface for connection with the side wall surface of the mounting slot body 13.

[0094] Since the mounting groove 1 is processed by a tool, and the tool is disc-shaped, the limiting end 12 of the mounting groove body 13 after tool processing includes a flat end face and arc-shaped transition sections on both sides of the end face, or the limiting end 12 is an arc surface.

[0095] A first protrusion 14 is processed on both side surfaces of the mounting slot body 13 along the circumferential direction of the rotor. While processing the first protrusion 14, at least a portion of the arc surface is cut, so that at least a portion of the arc surface forms a plane along the circumferential direction of the rotor after being cut, that is, a limiting surface 121. In other words, the end surface of the first protrusion 14 along the axial direction of the rotor close to the limiting end 12 forms at least a portion of the limiting surface 121.

[0096] A limiting surface 121 is processed at the limiting end 12 of the mounting groove 1. The limiting surface 121 is a plane along the circumference of the rotor, and abuts against the side of the magnetic pole module 2 facing the limiting end 12 in the axial direction of the rotor, thereby realizing direct surface contact between the limiting end 12 and the magnetic pole module 2. This changes the traditional mode in which a transition element needs to be installed between the limiting end 12 and the magnetic pole module 2 to achieve surface contact, thereby improving the installation stability of the magnetic pole module 2, ensuring that the magnetic pole module is not easy to slip out of the mounting groove 1 when the rotor is in working condition, and improving the safety of the rotor operation.

[0097] In this embodiment, the end surface of the installation slot body 13 along the axial direction of the rotor close to the limit end 12 is a plane. Between step S2 and step S3, step S21 is further included: moving the tool along the axial direction of the rotor until the tool abuts against the end surface of the installation slot body 13 along the axial direction of the rotor close to the limit end 12;

[0098] In step S3, the tool completely cuts the arc surface;

[0099] The end surface of the first protrusion 14 close to the limiting end 12 along the axial direction of the rotor and the end surface of the mounting slot body 13 close to the limiting end 12 along the axial direction of the rotor jointly form a limiting surface 121 .

[0100] The end face of the mounting groove body 13 close to the limit end 12 along the axial direction of the rotor is a plane, and the arc surface is completely cut during processing. The end face of the first protrusion 14 close to the limit end 12 is flush with the end face of the limit end 12, forming a limit surface 121 that can completely abut against the side face of the magnetic pole module 2 facing the limit end 12 in the axial direction of the rotor. The abutment area is large, which ensures the firmness of the installation of the magnetic pole module 2.

[0101] In other embodiments, when the end surface of the installation slot body 13 along the axial direction of the rotor close to the limiting end 12 is an arc surface, step S21 is further included between step S2 and step S3: driving the tool to continue cutting the rotor house 100 along the axial direction of the rotor until the tool is flush with the position of the installation slot body 13 farthest from the slot end 11;

[0102] In step S3, the tool completely cuts the arc surface;

[0103] An end surface of the first protrusion 14 close to the limiting end 12 along the axial direction of the rotor forms a limiting surface 121 .

[0104] The end face of the mounting slot body 13 close to the limit end 12 along the axial direction of the rotor is an arc surface, which is completely cut, and the end face of the first protrusion 14 close to the limit end 12 forms a limit surface 121 that can completely abut against the side face of the magnetic pole module 2 facing the limit end 12 in the axial direction of the rotor. The abutment area is large, which ensures the firmness of the installation of the magnetic pole module 2.

[0105] In other embodiments, in step S3 : the tool is driven to continuously cut the rotor house 100 along the circumference of the rotor until the tool moves into another adjacent mounting slot body 13 .

[0106] The tool moves from the mounting groove 1 to the adjacent mounting groove 1 for processing and subsequent processing, avoiding the step of moving the tool out of the mounting groove 1 and then moving it into the adjacent mounting groove 1 when the two first protrusions 14 of the adjacent mounting grooves 1 facing each other are not connected, greatly shortening the tool movement path, thereby improving processing efficiency.

[0107] Example 5

[0108] like Figure 11 As shown, this embodiment discloses a rotor processing method, which is used to process the rotor as described in Example 2. Steps S1 and S2 of this embodiment are the same as steps S1 and S2 of Example 4, and the difference lies in step S3.

[0109] In this embodiment, in step S3 , the tool is driven to continuously cut the rotor housing 100 along the circumferential direction of the rotor until the tool moves to the same mounting slot body 13 for processing again.

[0110] The tool moves along the circumference of the rotor at the position of the first protrusion 14 for one circle, presenting the first protrusion 14 of each mounting groove 1 in the form of a connecting groove, which greatly shortens the tool movement path and improves the processing efficiency.

[0111] Example 6

[0112] like Figure 12 As shown, this embodiment discloses a rotor processing method, which is used to process the rotor as described in Example 3, and includes the following steps:

[0113] Step S1: Using a tool to form a mounting groove body 13 on the rotor housing 100, the mounting groove body 13 has two sidewall surfaces along the circumference of the rotor and an end surface along the axial direction of the rotor close to the limiting end 12 transitioned through arc surfaces;

[0114] Step S2: After the installation slot body 13 is processed, the tool is moved into the installation slot body 13 and close to the limit end 12;

[0115] Step S3: Drive the cutting tool to contact the sidewall of the mounting slot body 13 and cut the rotor housing 100 along the axial direction of the rotor toward the outer portion of the mounting slot body 13 near the limiting end 12 to form a second protrusion 15. The cutting tool cuts beyond the end surface of the mounting slot body 13 near the limiting end 12 along the axial direction of the rotor.

[0116] Step S4: Repeat step S3 on the other side of the mounting slot body 13 along the circumferential direction of the rotor.

[0117] Since the mounting groove 1 is processed by a tool, and the tool is disc-shaped, the limiting end 12 of the mounting groove body 13 after tool processing includes a flat end face and arc-shaped transition sections on both sides of the end face, or the limiting end 12 is an arc surface.

[0118] Second protrusions 15 are respectively processed on the two side surfaces of the mounting slot body 13 along the circumferential direction of the rotor. The second protrusions 15 extend along the side wall surface of the mounting slot body 13 in the axial direction of the rotor and exceed the end surface of the mounting slot body 13 along the axial direction of the rotor close to the limit end 12. When the end surface of the mounting slot body 13 along the axial direction of the rotor close to the limit end 12 is a plane, the plane is the limit surface 121; when the end surface of the mounting slot body 13 along the axial direction of the rotor close to the limit end 12 is an arc surface, the arc surface is completely cut by the tool along the circumferential direction of the rotor to form a new plane, which is the limit surface 121. In other words, the end surface of the mounting slot body 13 along the axial direction of the rotor close to the limit end 12 located between the two second protrusions 15 forms the limit surface 121.

[0119] A limiting surface 121 is processed at the limiting end 12 of the mounting groove 1. The limiting surface 121 is a plane along the circumference of the rotor, and abuts against the side of the magnetic pole module 2 facing the limiting end 12 in the axial direction of the rotor, thereby realizing direct surface contact between the limiting end 12 and the magnetic pole module 2. This changes the traditional mode in which a transition element needs to be installed between the limiting end 12 and the magnetic pole module 2 to achieve surface contact, thereby improving the installation stability of the magnetic pole module 2, ensuring that the magnetic pole module is not easy to slip out of the mounting groove 1 when the rotor is in working condition, and improving the safety of the rotor operation.

[0120] In other embodiments, when the end surface of the mounting slot body 13 along the axial direction of the rotor close to the limit end 12 is an arc surface, step S31 is further included between step S3 and step S4: after cutting one second protrusion 15, the tool is driven to move along the axial direction of the rotor toward the slot end 11 until the tool is flush with the position of the mounting slot body 13 farthest from the slot end 11, and the tool is driven to cut the rotor house 100 along the circumference of the rotor until the tool abuts against the other side wall of the mounting slot body 13.

[0121] When the end surface of the mounting slot body 13 along the rotor axial direction close to the limit end 12 is an arc surface, the arc surface is partially cut by the tool on both sides along the rotor circumference to form two second protrusions 15. The middle part of the two second protrusions 15 is still an arc surface. At this time, it is necessary to drive the tool to completely cut the middle part of the two second protrusions 15 along the rotor circumference to form a new plane, namely the limit surface 121.

[0122] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A rotor comprising a rotor housing and a magnetic pole module, wherein the rotor housing is provided with a plurality of mounting slots extending along the axial direction of the rotor, the mounting slots being formed by milling on the rotor housing, the magnetic pole module being mounted in the mounting slots, the mounting slots having two ends along the axial direction of the rotor, respectively, a notch end and a limit end, the notch end being an open end, and the limit end being a closed end, characterized in that: The limiting end has a limiting surface, the limiting surface is perpendicular to the axis of the rotor, and the magnetic pole module abuts against the limiting surface on a side surface facing the limiting end in the axial direction of the rotor; The mounting slot includes: A mounting groove body, wherein two sidewall surfaces of the mounting groove body along the circumference of the rotor and an end surface of the mounting groove body close to the limiting end along the axial direction of the rotor are transitioned through arc surfaces; Two first protrusions, one located on either side of the mounting slot body along the circumferential direction of the rotor, the first protrusions being grooves machined on the rotor housing. The first protrusions extend from the interior of the mounting slot body along the circumferential direction of the rotor toward the exterior of corresponding sides of the mounting slot body, and cut at least one end of the arc surface for connection with the sidewall surface of the mounting slot body. In which, the depth of the first protrusion along the radial direction of the rotor is greater than or equal to the depth of the mounting slot body along the radial direction of the rotor, the length of the first protrusion along the axial direction of the rotor is less than the length of the magnetic pole module along the axial direction of the rotor, and the end face of the first protrusion along the axial direction of the rotor close to the limit end forms at least part of the limit surface.

2. The rotor according to claim 1, wherein: Along the axial direction of the rotor, the end surface of the first protrusion close to the limiting end is flush with the position of the installation slot body farthest from the slot end, and the first protrusion completely cuts the arc surface.

3. The rotor according to claim 1, wherein: The two first protrusions, respectively located on the sides of the adjacent mounting grooves facing each other, are communicated with each other.

4. A rotor comprising a rotor housing and a magnetic pole module, wherein the rotor housing is provided with a plurality of mounting slots extending along the axial direction of the rotor, the mounting slots being formed by milling on the rotor housing, the magnetic pole module being mounted in the mounting slots, the mounting slots having two ends along the axial direction of the rotor, respectively, a notch end and a limit end, the notch end being an open end, and the limit end being a closed end, characterized in that: The limiting end has a limiting surface, the limiting surface is perpendicular to the axis of the rotor, and the magnetic pole module abuts against the limiting surface on a side surface facing the limiting end in the axial direction of the rotor; The mounting slot includes: A mounting groove body, wherein two sidewall surfaces of the mounting groove body along the circumference of the rotor and an end surface of the mounting groove body close to the limiting end along the axial direction of the rotor are transitioned through arc surfaces; Two second protrusions, one located on either side of the mounting slot body along the circumferential direction of the rotor, the second protrusions being grooves machined on the rotor housing, the second protrusions extending along the sidewall surface of the mounting slot body in the axial direction of the rotor and extending beyond an end surface of the mounting slot body along the axial direction of the rotor close to the limit end; The depth of the second protrusion along the radial direction of the rotor is greater than or equal to the depth of the mounting slot body along the radial direction of the rotor, the sum of the widths of the two second protrusions in the circumferential direction of the rotor is less than the distance between the two side wall surfaces of the mounting slot body, and the end surface of the mounting slot body located between the two second protrusions along the axial direction of the rotor close to the limit end forms the limit surface.

5. A rotor processing method, characterized in that: The rotor processing method is used to process the rotor according to any one of claims 1 to 3, and comprises the following steps: Step S1, using a tool to form a mounting groove body on the rotor housing, wherein two sidewall surfaces of the mounting groove body along the circumference of the rotor and an end surface of the mounting groove body close to the limiting end along the axial direction of the rotor are transitioned through arc surfaces; Step S2: After the installation slot body is processed, the tool is moved into the installation slot body and close to the limit end; Step S3: driving a tool to cut the rotor housing from the inside of the mounting slot body along the circumference of the rotor toward the outside of both sides of the mounting slot body to form a first protrusion, wherein the tool at least cuts one end of the arc surface for connection with the side wall surface of the mounting slot body.

6. The rotor processing method according to claim 5, characterized in that: When the end surface of the mounting groove body close to the limit end along the axial direction of the rotor is a plane, step S21 is further included between step S2 and step S3: moving the tool along the axial direction of the rotor until the tool abuts against the end surface of the mounting groove body close to the limit end along the axial direction of the rotor; In step S3, the tool completely cuts the arc surface; The end surface of the first protrusion close to the limiting end along the axial direction of the rotor and the end surface of the installation slot body close to the limiting end along the axial direction of the rotor jointly form the limiting surface.

7. The rotor processing method according to claim 5, characterized in that: When the end surface of the installation slot body close to the limiting end along the axial direction of the rotor is an arc surface, the step S21 is further included between the step S2 and the step S3: driving the tool to continue cutting the rotor housing along the axial direction of the rotor until the tool is flush with the position of the installation slot body farthest from the slot end; In step S3, the tool completely cuts the arc surface; The end surface of the first protrusion close to the limiting end along the axial direction of the rotor forms the limiting surface.

8. The rotor processing method according to claim 5, wherein: In step S3 : the tool is driven to continuously cut the rotor housing along the circumference of the rotor until the tool moves into another adjacent mounting slot body.

9. The rotor processing method according to claim 8, wherein: In step S3 : the tool is driven to continuously cut the rotor housing along the circumference of the rotor until the tool is moved into the same mounting slot body again.

10. A rotor processing method, characterized in that: The rotor processing method is used to process the rotor according to claim 4, and comprises the following steps: Step S1, using a tool to form a mounting groove body on the rotor housing, wherein two sidewall surfaces of the mounting groove body along the circumference of the rotor and an end surface of the mounting groove body close to the limiting end along the axial direction of the rotor are transitioned through arc surfaces; Step S2: After the installation slot body is processed, the tool is moved into the installation slot body and close to the limit end; Step S3: driving a cutting tool to abut against a side wall of the mounting slot body and cutting the rotor housing along the axial direction of the rotor toward the exterior of the mounting slot body near the limiting end to form a second protrusion, with the cutting tool cutting beyond the end surface of the mounting slot body along the axial direction of the rotor near the limiting end; Step S4: repeat step S3 on the other side of the mounting slot body along the circumference of the rotor.

11. The rotor processing method according to claim 10, wherein: When the end surface of the mounting slot body along the axial direction of the rotor close to the limit end is an arc surface, step S31 is further included between step S3 and step S4: after cutting one of the second protrusions, driving the tool to move along the axial direction of the rotor toward the slot end until the tool is flush with the position of the mounting slot body farthest from the slot end, and driving the tool to cut the rotor house along the circumference of the rotor until the tool abuts against the other side wall of the mounting slot body.

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