Rotor and connecting and guiding shaft

Abstract

The utility model discloses a rotor, comprising a rotor iron core comprising a plurality of silicon steel sheets which are sequentially distributed along the axial direction, and each silicon steel sheet is provided with a shaft hole; inclined positioning grooves are formed in the inner wall of the shaft hole, extend in the axial direction and penetrate through the silicon steel sheets, and the inclined positioning grooves of the multiple silicon steel sheets are aligned in the axial direction. According to the utility model, the plurality of silicon steel sheets of the rotor core can be positioned through the oblique positioning grooves of the silicon steel sheets, key grooves can be prevented from being processed on the rotating shaft, the processing procedures of the rotating shaft are effectively reduced, the process flow is simplified, the assembly is simplified, and the cost is reduced. The utility model also discloses a connecting and guiding shaft which is used for installing the rotor.

Description

Technical Field

[0001] The utility model relates to the technical field of rotors, in particular to a rotor and a guide shaft. Background Art

[0002] With the development of science and technology, the current new energy vehicles have an increasingly higher demand for NVH (Noise, Vibration and Harshness).

[0003] In order to meet NVH requirements, multiple silicon steel sheets in the rotor core of the motor rotor are usually rotated relative to each other to form a step, such as a V-shaped step, and the rotor core is installed on the shaft in a posture of maintaining the step.

[0004] Currently, a keyway is usually opened on the rotating shaft, and positioning protrusions are set on the inner walls of the shaft holes of multiple silicon steel sheets, so that the keyway on the rotating shaft cooperates with the positioning protrusions on the inner walls of the shaft holes to achieve positioning of the multiple silicon steel sheets, thereby installing the rotor core on the rotating shaft in an oblique posture.

[0005] However, the above method requires grooving on the shaft, which will increase the processing steps of the shaft, complicate the process flow, make the assembly cumbersome, and increase the cost. In addition, positioning bumps must be processed on the inner wall of the shaft hole of the silicon steel sheet, which will further increase the material cost of the silicon steel sheet. Utility Model Content

[0006] The purpose of the utility model is to solve the problem that the current positioning method of multiple silicon steel sheets of the rotor core leads to high cost of silicon steel sheets and rotating shafts, long processing steps of rotating shafts, complex process flow and cumbersome assembly. The utility model provides a rotor and a guide shaft, which can effectively reduce the processing steps of the rotating shaft, simplify the process flow, simplify the assembly, and reduce the cost of the rotating shaft and silicon steel sheets.

[0007] In order to solve the above technical problems, the embodiment of the utility model discloses a rotor, comprising:

[0008] The rotor core comprises:

[0009] A plurality of silicon steel sheets are sequentially distributed along the axial direction, and each of the silicon steel sheets has an axial hole;

[0010] The inner wall of the shaft hole is provided with an oblique step positioning groove, which extends along the axial direction and passes through the silicon steel sheet. The oblique step positioning grooves of the multiple silicon steel sheets are aligned along the axial direction. The multiple oblique step positioning grooves are used to cooperate with the oblique step positioning keys of the connecting shaft to limit the relative rotation of the multiple silicon steel sheets.

[0011] By adopting the above technical solution, a step positioning groove is provided on the inner wall of the shaft hole of each silicon steel sheet to cooperate with the step positioning key on the guide shaft to limit the relative rotation between multiple silicon steel sheets, thereby realizing the positioning of the steps of multiple silicon steel sheets. In the above technical solution, since the step positioning groove is provided on the inner wall of the shaft hole of the silicon steel sheet, and the step positioning groove is used to cooperate with the step positioning key on the guide shaft to realize positioning, it is not necessary to process a structure similar to the positioning groove on the rotating shaft, which effectively reduces the processing steps of the rotating shaft and simplifies the process flow. In addition, since the positioning groove is provided on the inner wall of the shaft hole of the silicon steel sheet, the material cost of the silicon steel sheet is further reduced.

[0012] According to another specific embodiment of the utility model, the inner wall of the axial hole of each silicon steel sheet is provided with four oblique positioning grooves, and the four oblique positioning grooves are arranged at intervals along the circumference of each silicon steel sheet;

[0013] Along the axial direction, at least two of the oblique-step positioning grooves in each silicon steel sheet are respectively aligned with one of the oblique-step positioning grooves in the remaining silicon steel sheets.

[0014] According to another specific implementation of the present utility model, the number of the silicon steel sheets is six.

[0015] According to another specific embodiment of the utility model, it also includes:

[0016] The rotating shaft is interference-fitted with the shaft hole of each silicon steel sheet among the plurality of silicon steel sheets.

[0017] By adopting the above technical solution, the rotating shaft and the shaft holes of multiple silicon steel sheets are interference fit, and there is no need to process keyway features on the rotating shaft, which effectively reduces the processing procedures of the rotating shaft and simplifies the process flow.

[0018] According to another specific embodiment of the utility model, a connecting groove is provided at one end of the rotating shaft, and the connecting groove is used to connect the tapered block of the guide shaft.

[0019] By adopting the above technical solution, a connecting groove is provided at the end of the rotating shaft to cooperate with the conical block of the guide shaft, so that the assembly process of the rotating shaft and the plurality of silicon steel sheets can be made smoother.

[0020] The utility model also discloses a guide shaft, comprising:

[0021] A first fixing groove is provided on a side wall of the receiving shaft, and the first fixing groove extends along the axial direction of the receiving shaft;

[0022] An oblique-step positioning key is fixed in the first fixing groove, and the oblique-step positioning key extends along the axial direction;

[0023] Along the radial direction of the guide shaft, the top of the inclined step positioning key protrudes from the outer surface of the guide shaft, and the inclined step positioning key is used to cooperate with the inclined step positioning grooves of multiple silicon steel sheets of the rotor core to limit the relative rotation of the multiple silicon steel sheets.

[0024] By adopting the above technical solution, a first fixed groove is provided on the side wall of the guide shaft, and an oblique step positioning key is provided in the first fixed groove to cooperate with the oblique step positioning grooves of the multiple silicon steel sheets of the rotor core, so as to limit the relative rotation between the multiple silicon steel sheets, thereby realizing the oblique step positioning of the rotor core. Then, it is only necessary to make one end of the rotating shaft axially abut against one end of the guide shaft, and to make the rotating shaft and the guide shaft move synchronously relative to the multiple silicon steel sheets axially, so that the multiple silicon steel sheets can be assembled to the rotating shaft in an oblique step posture. By positioning the multiple silicon steel sheets through the guide shaft of the embodiment of the present application, there is no need to open a keyway on the rotating shaft, which can effectively reduce the processing cost of the rotating shaft, and there is no need to process a positioning bump on the inner wall of the shaft hole of the silicon steel sheet, which can further reduce the material cost of the silicon steel sheet. In addition, the assembly method is simple, which can improve the production efficiency of the rotor.

[0025] According to another specific embodiment of the utility model, the number of the first fixing grooves is two, and the two first fixing grooves are arranged at intervals along the circumference of the receiving shaft;

[0026] The number of the oblique-step positioning keys corresponds one-to-one to the number of the first fixing grooves.

[0027] By adopting the above technical solution, the number of the first fixing groove and the inclined step positioning key are set to two, which can effectively improve the restriction on the relative rotation between the multiple silicon steel sheets and improve the positioning effect of the inclined step of the rotor core.

[0028] According to another specific embodiment of the utility model, it also includes:

[0029] A second fixing groove is provided on a side wall of the receiving shaft, and the second fixing groove extends along the axial direction of the receiving shaft;

[0030] a center positioning key, fixed in the second fixing groove, the center positioning key extending along the axial direction, and the center positioning key being able to move along the radial direction of the guiding shaft so that the guiding shaft is in a first state or a second state;

[0031] In the first state, along the radial direction, the top of the center positioning key is lower than the outer surface of the guide shaft, or along the radial direction, the top of the center positioning key and the outer surface of the guide shaft are located on the same arc surface;

[0032] In the second state, along the radial direction, the top of the center positioning key protrudes from the outer surface of the guide shaft, so that the center positioning key abuts against the inner wall of the axial hole of the multiple silicon steel sheets of the rotor to achieve center positioning of the multiple silicon steel sheets, and along the radial direction, the height of the center positioning key is lower than the oblique positioning key.

[0033] The above technical solution is adopted, a second fixing groove is set on the side wall of the receiving shaft, and a center positioning key is set in the second fixing groove. The center positioning key is enabled to move radially to switch to the first state and the second state. In the first state, the top of the center positioning key is lower than the outer surface of the receiving shaft or is located on the same arc surface as the outer surface of the receiving shaft, so that the receiving shaft can be smoothly inserted into the shaft holes of multiple silicon steel sheets to perform oblique positioning of multiple silicon steel sheets. By switching the center positioning key from the first state to the second state, in the second state, the top of the center positioning key protrudes from the outer surface of the receiving shaft, so that the center positioning key abuts against the inner wall of the shaft hole of each silicon steel sheet, thereby realizing the center positioning of multiple silicon steel sheets, so as to improve the coaxiality of multiple silicon steel sheets, so as to facilitate the subsequent assembly of multiple silicon steel sheets to the rotating shaft. Before assembling multiple silicon steel sheets to the rotating shaft, the center positioning key is switched from the second state to the first state, so that the rotating shaft can be smoothly inserted into the shaft holes of multiple silicon steel sheets.

[0034] According to another specific embodiment of the utility model, the number of the second fixing grooves is four, and the four second fixing grooves are arranged at intervals along the circumference of the receiving shaft;

[0035] The number of the central positioning keys corresponds to the number of the second fixing grooves.

[0036] By adopting the above technical solution, the number of the second fixing groove and the center positioning key is set to four, and the four center positioning keys are arranged at intervals along the circumferential direction, which can abut against the inner walls of the axial holes of multiple silicon steel sheets from four directions respectively, further improving the center positioning effect.

[0037] According to another specific embodiment of the utility model, a connecting portion is provided at one end of the guide shaft;

[0038] The connecting portion is used to connect one end of the rotating shaft.

[0039] By adopting the above technical solution, a connecting portion is provided at one end of the guiding shaft for connecting with the rotating shaft, which can improve the stability of the assembly process.

[0040] According to another specific embodiment of the utility model, the connecting portion is a tapered block, and the tapered block is used to cooperate with a connecting groove on the rotating shaft so that the guiding shaft is connected to the rotating shaft.

[0041] By adopting the above technical solution, the connecting part is set as a conical block, which has a simple and effective structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A three-dimensional view of a rotor according to an embodiment of the utility model is shown;

[0043] Figure 2 A three-dimensional view of a rotor core according to an embodiment of the utility model is shown;

[0044] Figure 3 A cross-sectional view of a rotor according to an embodiment of the utility model is shown;

[0045] Figure 4 A top view of a silicon steel sheet according to an embodiment of the utility model is shown;

[0046] Figure 5 A three-dimensional view of a guide shaft according to an embodiment of the utility model is shown;

[0047] Figure 6a A top view of the center positioning key of the guide shaft according to an embodiment of the utility model in a first state is shown;

[0048] Figure 6b A top view of the center positioning key of the guide shaft according to an embodiment of the utility model in the second state is shown;

[0049] Figure 7 A three-dimensional view of the guide shaft, rotor core and rotating shaft of the embodiment of the utility model when they are positioned is shown. DETAILED DESCRIPTION

[0050] The following is an explanation of the implementation of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0051] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0052] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0053] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0054] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0055] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0056] refer to Figure 1 The embodiment of the present application provides a rotor 10, which includes a rotor core 100 and a rotating shaft 300. The rotor core 100 is disposed on the rotating shaft 300, and the rotating shaft 300 can drive the rotor core 100 to rotate synchronously.

[0057] For example, reference Figures 2 to 3 Combined with Figure 1 The rotor core 100 includes six silicon steel sheets 110. Each silicon steel sheet 110 has an axial hole 111, and the axial hole 111 is for the shaft 300 to pass through. Exemplarily, the six silicon steel sheets 110 are sequentially arranged along the axial direction X and coaxially arranged, and the shaft 300 sequentially passes through the axial hole 111 of each silicon steel sheet 110 to form a rotor (such as Figure 2 and Figure 3 shown).

[0058] For example, continue to refer to Figure 2 Combined with Figure 4, a plurality of identification parts 114 are provided on the side wall of each silicon steel sheet 110, and the plurality of identification parts 114 are arranged at intervals along the circumferential direction R of the silicon steel sheet 110, and each identification part 114 includes a first groove 1141, a second groove 1142, a third groove 1143 and a fourth groove 1144, and the first groove 1141, the second groove 1142, the third groove 1143 and the fourth groove 1144 all penetrate the silicon steel sheet 110 along the axial direction X. The first groove 1141, the second groove 1142, the third groove 1143 and the fourth groove 1144 can effectively reduce the vibration and noise of the motor during operation to meet the NVH requirements.

[0059] In addition, each identification portion 114 can also assist in determining the inclination level of the rotor core 100 .

[0060] For example, continue to refer to Figure 2 The identification portions 114 of the six silicon steel sheets 110 form a substantially “V”-shaped structure along the axial direction X (as shown by the dotted line a), that is, the rotor core 100 is V-shaped and stepped.

[0061] For example, continue to refer to Figure 2 The inner wall 112 of the axial hole 111 of each silicon steel sheet 110 is provided with four oblique positioning grooves 113 (i.e., oblique positioning grooves 113a, 113b, 113c, and 113d), and each oblique positioning groove 113 penetrates the silicon steel sheet 110 along the axial direction X.

[0062] Furthermore, at least one oblique positioning groove 113 of each silicon steel sheet 110 is aligned with one oblique positioning groove 113 of each of the other five silicon steel sheets 110 along the axial direction X to form a positioning long groove 115 (such as Figure 3 That is to say, the six oblique positioning grooves 113 are opposite to each other along the axial direction X to form a positioning long groove 115.

[0063] By providing a stepped positioning groove 113 on the inner wall 112 of the shaft hole of each silicon steel sheet 110 and performing stepped positioning on the six silicon steel sheets 110 through the six stepped positioning grooves 113, it is possible to avoid grooving on the rotating shaft, reduce the processing steps of the rotating shaft, and reduce the cost of the rotating shaft. In addition, providing the stepped positioning groove 113 on the inner wall 112 of the shaft hole can further reduce the material cost of the silicon steel sheet 110.

[0064] Specifically, refer to Figure 1 Combined with Figure 3For example, the oblique level positioning groove 113a and the oblique level positioning groove 113b of one silicon steel sheet 110 are arranged opposite to each other in the radial direction Y, the oblique level positioning groove 113a and an oblique level positioning groove 113 of each of the other five silicon steel sheets 110 are arranged opposite to each other in the axial direction X to form a positioning long groove 115, and the oblique level positioning groove 113b and an oblique level positioning groove 113 of each of the other five silicon steel sheets 110 are arranged opposite to each other in the axial direction X to form a positioning long groove 115. The two positioning long grooves 115 are arranged opposite to each other in the radial direction Y.

[0065] In other possible embodiments, each oblique positioning groove 113 of each silicon steel sheet 110 is arranged opposite to an oblique positioning groove 113 of each silicon steel sheet 110 in the other five silicon steel sheets 110 along the axial direction X to form a long positioning groove 115, that is, the six silicon steel sheets 110 form a total of four long positioning grooves 115 (not shown in the figure), and the four long positioning grooves 115 are arranged at intervals along the circumferential direction R.

[0066] It should be noted that the embodiment of the present application does not impose any specific limitation on the number of silicon steel sheets 110. For example, in other possible implementations, the number of silicon steel sheets 110 may be eight, ten, twelve, or more.

[0067] For example, reference Figure 2 , the silicon steel sheet 110a and the silicon steel sheet 110b are taken as examples for explanation. In the embodiment of the present application, the silicon steel sheet 110a and the silicon steel sheet 110b are completely the same silicon steel sheet 110. However, since the rotor core 100 needs to form a V-shaped inclined step, the silicon steel sheet 110a and the silicon steel sheet 110b need to be relatively rotated along the circumferential direction R. At this time, the inclined step positioning grooves 113 of the silicon steel sheet 110a and the silicon steel sheet 110b will also be relatively rotated along the circumferential direction R, so that the inclined step positioning grooves 113 of the silicon steel sheet 110a and the silicon steel sheet 110b are misaligned along the axial direction X.

[0068] In the embodiment of the present application, four oblique step positioning grooves 113 are arranged on each silicon steel sheet 110, so that after the silicon steel sheet 110a and the silicon steel sheet 110b rotate relative to each other in the circumferential direction R (for example, rotate 91°, the embodiment of the present application does not impose any specific restriction on the rotation angle between the silicon steel sheet 110a and the silicon steel sheet 110b, and can be adjusted according to the relative position relationship between the identification portion 114 and the oblique step positioning groove 113) to form a V-shaped oblique step, the oblique step positioning groove 113c of the silicon steel sheet 110b is opposite to the oblique step positioning groove 113a of the silicon steel sheet 110a along the axial direction X, and one oblique step positioning groove 113d of the silicon steel sheet 110b is opposite to the oblique step positioning groove 113b of the silicon steel sheet 110a along the axial direction X. That is, in the embodiment of the present application, by providing four oblique-step positioning grooves 113 on each silicon steel sheet 110, six identical silicon steel sheets 110 can be rotated along the circumferential R phase to form a V-shaped oblique step, while each silicon steel sheet 110 still has an oblique-step positioning groove 113 that is opposite to one oblique-step positioning groove 113 in the other five silicon steel sheets 110 along the axial direction X to form a positioning long groove 115. In this way, only one type of silicon steel sheet 110 can be produced, effectively reducing the production cost of the rotor core 100.

[0069] The embodiment of the present application does not impose any specific limitation on the number of the oblique positioning grooves 113 of each silicon steel sheet 110. For example, the number of the oblique positioning grooves 113 of each silicon steel sheet 110 may be one, or two, three, five or more.

[0070] The embodiment of the present application does not impose any specific limitation on the number of the positioning long grooves 115. For example, in other possible implementations, the number of the positioning long grooves 115 may be one, three, five, or more.

[0071] In summary, in order to install the rotor core 100 on the rotating shaft 300 in a V-shaped inclined posture, the embodiment of the present application provides a guide shaft 200 (such as Figure 5 The guide shaft 200 can first perform oblique positioning on the six silicon steel sheets 110 of the rotor core 100, and then the shaft 300 is inserted into the shaft holes 111 of the six silicon steel sheets 110 along the axial direction X to replace the guide shaft 200, so that the rotor core 100 can be installed on the shaft 300 in a V-shaped oblique posture.

[0072] The specific structure of the guide shaft 200 will be described in detail below with reference to the accompanying drawings.

[0073] refer to Figure 5 In a possible implementation manner, the side wall of the guide shaft 200 provided in the embodiment of the present application is provided with two first fixing grooves 220, and each first fixing groove 220 extends along the axial direction X. The two first fixing grooves 220 are spaced apart along the circumferential direction R (in the embodiment of the present application, the circumferential direction of the guide shaft 200 is the same as the circumferential direction of the above-mentioned rotor).

[0074] The embodiment of the present application does not impose any specific limitation on the specific number of the first fixing grooves 220 . For example, in other possible implementations, the number of the first fixing grooves 220 may be one, three, four, or more.

[0075] For example, reference Figure 5 Combined with Figure 6 and Figure 7 Each first fixing groove 220 is provided with an oblique-step positioning key 221, and each oblique-step positioning key 221 extends along the axial direction X. Along the radial direction Y of the guide shaft 200, the top of the oblique-step positioning key 221 protrudes from the outer surface of the guide shaft 200. Exemplarily, the rotor core 100 includes six silicon steel sheets 110 as an example for explanation. The oblique-step positioning key 221 is used to cooperate with the positioning long grooves 115 formed by the six silicon steel sheets 110 to limit the relative rotation between the six silicon steel sheets 110, complete the positioning of the six silicon steel sheets 110, and thus realize the oblique-step positioning of the rotor core 100.

[0076] By providing a step positioning key 221 on the guide shaft 200 to cooperate with the step positioning groove 113 on the silicon steel sheet 110 to achieve step positioning of multiple silicon steel sheets 110, it is possible to avoid providing a positioning protrusion on the rotating shaft 300, further reducing the processing steps of the rotating shaft 300 and reducing the cost of the rotating shaft 300.

[0077] Exemplarily, in the embodiment of the present application, each oblique-step positioning key 221 is fixed in the first fixed groove 220 by two fixing blocks 222, each fixing block 222 is provided with a screw hole (not shown in the figure), and the oblique-step positioning key 221 is respectively provided with a fixing hole at both ends along the axial direction X (not shown in the figure), and the screw hole of each fixing block 222 and a fixing hole are fixed in the first fixed groove 220 by bolts.

[0078] Exemplarily, one end of the rotating shaft 300 can abut against one end of the receiving shaft 200, and the rotating shaft 300 and the receiving shaft 200 can move synchronously along the axial direction X. After the receiving shaft 200 completes the positioning of the six silicon steel sheets 110, the rotating shaft 300 moves along the direction X1 (that is, the rotating shaft 300 moves toward the receiving shaft 200 along the axial direction X), and drives the receiving shaft 200 to move synchronously along the direction X1, so that the rotating shaft 300 enters the shaft holes 111 of the six silicon steel sheets 110 along the axial direction X, thereby realizing that the six silicon steel sheets 110 are assembled on the rotating shaft 300 in a V-shaped oblique posture (such as Figure 1 The rotating shaft 300 is interference-fitted with the inner wall 112 of the shaft hole of each silicon steel sheet 110 to ensure that the six silicon steel sheets 110 do not rotate relative to each other during the operation of the rotor.

[0079] In summary, the guide shaft 200 provided in the embodiment of the present application cooperates with the positioning long groove 115 formed by the oblique level positioning key 221 and the oblique level positioning groove 113 of the six silicon steel sheets 110 to limit the relative rotation between the six silicon steel sheets 110, so as to realize the positioning of the six silicon steel sheets 110, thereby positioning the oblique level of the rotor core 100. In other words, by positioning the guide shaft 200 in the embodiment of the present application, there is no need to set positioning structures such as positioning protrusions or keyways on the rotating shaft 300. It can effectively reduce the processing procedures of the rotating shaft 300, reduce the production cost of the rotating shaft 300, and improve the production efficiency of the rotating shaft 300. In addition, the guide shaft 200 can be reused to position multiple rotor cores 100, which has good economic benefits.

[0080] Furthermore, by using the guiding shaft 200 provided in the embodiment of the present application for positioning, after the positioning is completed, it is only necessary to move the rotating shaft 300 synchronously with the guiding shaft 200 along the axial direction X, so that the rotating shaft 300 enters the axial hole 111 of each silicon steel sheet 110 along the axial direction X, and the six silicon steel sheets 110 can be assembled to the rotating shaft in a V-shaped inclined posture. The assembly is simple and can effectively improve the production efficiency of the rotor.

[0081] In one possible implementation, continue to refer to Figure 5 Combined with Figure 7 A connecting portion 210 is provided at one end of the guiding shaft 200, and the rotating shaft 300 has a connecting end 310. The connecting portion 210 can be connected to the connecting end 310 of the rotating shaft 300, so that the connecting end of the rotating shaft 300 is connected to one end of the guiding shaft 200, thereby making the rotating shaft 300 and the guiding shaft 200 more stable during the synchronous movement along the axial direction X, and facilitating the assembly of the six silicon steel sheets 110 to the rotating shaft 300.

[0082] For example, reference Figure 5 and Figure 3 The connecting portion 210 is a conical block, and the connecting end 310 has a connecting groove 320 . The conical block can be snapped into the connecting groove 320 so that the connecting end 310 of the rotating shaft 300 is connected to one end of the guiding shaft 200 .

[0083] For example, continue to refer to Figure 5 Along the circumferential direction R, an annular groove 211 is provided on the circumferential side of the connecting portion 210 , and the connecting end 310 can abut against the annular groove 211 to further improve the stability of the synchronous movement of the rotating shaft 300 and the guiding shaft 200 along the axial direction X.

[0084] In some possible implementations, reference Figure 5The side wall of the guide shaft 200 is provided with four second fixing grooves 230, which are arranged at intervals along the circumferential direction R of the guide shaft 200, and each second fixing groove 230 extends along the axial direction X of the guide shaft 200. A center positioning key 231 is provided in each second fixing groove 230, and each center positioning key 231 extends along the axial direction X.

[0085] Exemplarily, in the embodiment of the present application, each center positioning key 231 is fixed in the second fixing groove 230 by two connecting blocks 232, each connecting block 232 is provided with a screw hole, and the center positioning key 231 is provided with a connecting hole (not shown in the figure) at both ends along the axial direction X, and the screw hole of each connecting block 232 and a connecting hole are fixed in the second fixing groove 230 by bolts (not shown in the figure).

[0086] In one possible implementation, reference Figure 5 Combined with Figure 6a and Figure 6b The center positioning key 231 can move along the radial direction Y of the guiding shaft 200 to switch the guiding shaft 200 to the first state or the second state.

[0087] Specifically, in the first state, along the radial direction Y, the top of the center positioning key 231 is lower than the outer surface of the guide shaft 200, or along the radial direction Y, the top of the center positioning key 231 and the outer surface of the guide shaft 200 are located on the same arc surface. In other words, along the radial direction Y, the top of the center positioning key 231 does not protrude from the outer surface of the guide shaft 200 (e.g., Figure 6a shown).

[0088] In the second state, if Figure 6b As shown, along the radial direction Y, the top of the center positioning key 231 protrudes from the outer surface of the guide shaft 200. Exemplarily, the height of the portion of the top of each oblique-step positioning key 221 protruding from the outer surface of the guide shaft 200 along the radial direction Y is L1, and the height of the portion of the top of each center positioning key 231 protruding from the outer surface of the guide shaft 200 along the radial direction Y is L2, and L1>L2. That is, along the radial direction Y, the height of the center positioning key 231 is lower than that of the oblique-step positioning key 221.

[0089] It should be noted that the center positioning key 231 can move along the radial direction Y of the receiving shaft 200, wherein the embodiment of the present application does not impose any specific restrictions on "movement". For example, the center positioning key 231 can be moved along the radial direction Y by a mechanical structure. For another example, the center positioning key 231 can be expanded to switch the center positioning key 231 to the second state, or the center positioning key 231 can be contracted to switch the center positioning key 231 to the first state. As long as the center positioning key 231 can be switched from the first state to the second state, or from the second state to the first state, it will be sufficient.

[0090] refer to Figure 5 Combined with Figure 2 Each center positioning key 231 can abut against the inner wall 112 of the shaft hole of each silicon steel sheet 110 along the radial direction Y to perform center positioning on the six silicon steel sheets 110, that is, to make the six silicon steel sheets 110 coaxial.

[0091] By adopting the above technical solution, a second fixing groove 230 is provided on the side wall of the guide shaft 200, and a center positioning key 231 is provided in the second fixing groove 230. By enabling the center positioning key 231 to move along the radial direction Y to switch to the first state and the second state, in the first state, the top of the center positioning key 231 does not protrude from the outer surface of the guide shaft 200 along the radial direction Y, so that the guide shaft 200 can be smoothly inserted into the shaft holes 111 of the plurality of silicon steel sheets 110, so as to perform oblique positioning on the plurality of silicon steel sheets 110. By enabling the center positioning key 231 to switch from the first state to the second state, in the second state, the top of the center positioning key 231 protrudes from the outer surface of the guide shaft 200 along the radial direction Y, so that the center positioning key 231 abuts against the inner wall 112 of the shaft hole of each silicon steel sheet 110, so as to realize the center positioning of the plurality of silicon steel sheets 110, so as to improve the coaxiality of the plurality of silicon steel sheets 110, so as to facilitate the subsequent assembly of the plurality of silicon steel sheets 110 onto the rotating shaft 300. Before assembling the plurality of silicon steel sheets 110 to the rotating shaft 300 , the center positioning key 231 is switched from the second state to the first state so that the rotating shaft 300 can be smoothly inserted into the shaft holes 111 of the plurality of silicon steel sheets 110 .

[0092] In summary, the guide shaft 200 provided in the embodiment of the present application can realize the center positioning of the six silicon steel sheets 110 while the oblique positioning of the rotor core 100, so that the rotating shaft 300 can enter the axial hole 112 of each silicon steel sheet 110 along the axial direction X to realize assembly.

[0093] The number of the second fixing slots 230 is not specifically limited in the present embodiment. For example, in other possible implementations, the number of the second fixing slots 230 may be six, seven, eight, etc. The number of the center positioning keys 231 corresponds to the number of the second fixing slots 230 one by one.

[0094] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A rotor, characterized in that: include: The rotor core comprises: A plurality of silicon steel sheets are sequentially distributed along the axial direction, and each of the silicon steel sheets has an axial hole; The inner wall of the shaft hole is provided with an oblique step positioning groove, which extends along the axial direction and passes through the silicon steel sheet. The oblique step positioning grooves of the multiple silicon steel sheets are aligned along the axial direction. The multiple oblique step positioning grooves are used to cooperate with the oblique step positioning keys of the connecting shaft to limit the relative rotation of the multiple silicon steel sheets.

2. The rotor according to claim 1, characterized in that The inner wall of the shaft hole of each silicon steel sheet is provided with four oblique positioning grooves, and the four oblique positioning grooves are arranged at intervals along the circumference of each silicon steel sheet; Along the axial direction, at least two of the oblique-step positioning grooves in each silicon steel sheet are respectively aligned with one of the oblique-step positioning grooves in the remaining silicon steel sheets.

3. The rotor according to claim 1, characterized in that The number of the silicon steel sheets is six.

4. A rotor according to any one of claims 1 to 3, characterized in that: Also includes: The rotating shaft is interference-fitted with the shaft hole of each silicon steel sheet among the plurality of silicon steel sheets.

5. The rotor according to claim 4, characterized in that A connecting groove is provided at one end of the rotating shaft, and the connecting groove is used to connect the tapered block of the guide shaft.

6. A guide shaft for mounting a rotor as claimed in any one of claims 1 to 5, characterized in that: include: A first fixing groove is provided on a side wall of the receiving shaft, and the first fixing groove extends along the axial direction of the receiving shaft; An oblique-step positioning key is fixed in the first fixing groove, and the oblique-step positioning key extends along the axial direction; Along the radial direction of the connecting shaft, the top of the inclined step positioning key protrudes from the outer surface of the connecting shaft, and the inclined step positioning key is used to cooperate with the inclined step positioning groove of each of the multiple silicon steel sheets of the rotor core to limit the relative rotation of the multiple silicon steel sheets.

7. The guide shaft according to claim 6, characterized in that: The number of the first fixing grooves is two, and the two first fixing grooves are arranged at intervals along the circumference of the receiving shaft; The number of the oblique-step positioning keys corresponds one-to-one to the number of the first fixing grooves.

8. The guide shaft according to claim 6, characterized in that: Also includes: A second fixing groove is provided on a side wall of the receiving shaft, and the second fixing groove extends along the axial direction of the receiving shaft; a center positioning key, fixed in the second fixing groove, the center positioning key extending along the axial direction, and the center positioning key being able to move along the radial direction of the guiding shaft so that the guiding shaft is in a first state or a second state; In the first state, along the radial direction, the top of the center positioning key is lower than the outer surface of the guide shaft, or along the radial direction, the top of the center positioning key and the outer surface of the guide shaft are located on the same arc surface; In the second state, along the radial direction, the top of the center positioning key protrudes from the outer surface of the guide shaft, so that the center positioning key abuts against the inner wall of the axial hole of the multiple silicon steel sheets of the rotor to achieve center positioning of the multiple silicon steel sheets, and along the radial direction, the height of the center positioning key is lower than the oblique positioning key.

9. The guide shaft according to claim 8, characterized in that: The number of the second fixing grooves is four, and the four second fixing grooves are arranged at intervals along the circumference of the guide shaft; The number of the central positioning keys corresponds to the number of the second fixing grooves.

10. The guide shaft according to claim 6, characterized in that: One end of the guide shaft is provided with a connecting portion; The connecting portion is used to connect one end of the rotating shaft.

11. The guide shaft according to claim 10, characterized in that: The connecting portion is a tapered block, and the tapered block is used to cooperate with the connecting groove on the rotating shaft so that the guiding shaft is connected to the rotating shaft.

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