Stator slot wedge and stator

Abstract

The utility model relates to the technical field of motors, in particular to a stator slot wedge and a stator. The stator slot wedge is used for being clamped and fixed in an open slot of a stator iron core, the open slot penetrates through the stator iron core in the radial direction of the stator iron core, the stator slot wedge blocks a top opening of the open slot, and the stator slot wedge comprises an insertion end and a positioning end, the insertion end and the positioning end are located at the two ends, in the radial direction of the stator iron core, of the stator slot wedge respectively, and a positioning structure is arranged on the positioning end and can abut against the outer circumferential face of the stator iron core. When the stator slot wedge needs to be clamped and installed in the open slot, the insertion end of the stator slot wedge is aligned with the open slot, and then the stator slot wedge is pushed into the open slot from outside to inside along the radial direction of the stator core until the positioning structure on the positioning end abuts against the outer circumferential surface of the stator core. The stator slot wedge is positioned and installed in the open slot, and the accuracy of the installation position of the stator slot wedge in the open slot is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a stator slot wedge and a stator. Background Art

[0002] The axial flux permanent magnet motor has the advantages of compact structure, high power density and high efficiency, and has become a hot spot in the motor industry. The stator in the motor is an important part of the magnetic circuit of the motor. The iron core slots for storing windings in the stator include three structures: open slots, semi-open slots and closed slots. At present, the structure of the iron core slot that can exert the maximum performance of the motor is the semi-open slot, which can not only play a magnetic concentrating effect, but also effectively reduce the loss of the magnetic slot wedge.

[0003] In the related art, the stator slot wedge is usually installed in the open slot of the iron core, so as to play the role of a semi-open slot. However, during the installation of the stator slot wedge, it is impossible to ensure the accuracy of the installation position of the stator slot wedge in the open slot, which greatly reduces the reliability of the stator.

[0004] Therefore, there is an urgent need for a stator slot wedge and a stator to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a stator slot wedge and a stator, so as to realize the positioning installation of the stator slot wedge in the open slot, ensure the accuracy of the installation position of the stator slot wedge in the open slot, and improve the reliability of the stator.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A stator slot wedge is used for being clamped and fixed in an open slot of a stator iron core. The open slot penetrates through the stator iron core along the radial direction of the stator iron core, and the stator slot wedge seals the top opening of the open slot.

[0008] The stator slot wedge includes an insertion end and a positioning end. The insertion end and the positioning end are respectively located at two ends of the stator slot wedge along the radial direction of the stator iron core. A positioning structure is arranged on the positioning end, and the positioning structure can be abutted against the outer circumferential surface of the stator iron core.

[0009] As an optional solution, the positioning structure includes a positioning protrusion. The positioning protrusion is arranged on the positioning end, and the positioning protrusion can be abutted against the outer circumferential surface of the stator iron core.

[0010] As an optional solution, the positioning structure includes two positioning protrusions, and the two positioning protrusions are arranged on the two outer side walls of the positioning end along the width direction of the stator slot wedge.

[0011] As an alternative, the stator slot wedge further includes:

[0012] A magnetic conduction part, the outer side wall of the magnetic conduction part is clamped and magnetically connected to the inner side wall of the open slot; and

[0013] A non-magnetic conduction part, on which the magnetic conduction part is arranged.

[0014] As an alternative, the two ends of the magnetic conduction part along the radial direction of the stator core are respectively a first end and a second end. The non-magnetic conduction part includes a main body part and a first limiting part which are connected. The magnetic conduction part is arranged on the main body part. The first limiting part fits the end face of the first end, and the first limiting part is the positioning end.

[0015] As an alternative, the non-magnetic conduction part further includes a second limiting part. The second limiting part and the first limiting part are arranged at intervals along the radial direction of the stator core. The second limiting part is connected to the main body part. The second limiting part fits the end face of the second end, and the second limiting part is the insertion end.

[0016] As an alternative, the second limiting part extends out of the open slot towards the inside of the stator core.

[0017] As an alternative, a clamping protrusion is arranged on the outer side wall of the magnetic conduction part along the width direction of the stator slot wedge. The clamping protrusion is clamped in a clamping groove on the inner side wall of the open slot.

[0018] As an alternative, the stator slot wedge includes two magnetic conduction parts arranged at intervals along the width direction of the stator slot wedge.

[0019] A stator includes a stator core and the stator slot wedge as described above. A plurality of open slots are arranged at intervals along the circumferential direction of the stator core, and one stator slot wedge is arranged in each open slot.

[0020] The beneficial effects of the present utility model:

[0021] The present utility model provides a stator slot wedge, which is used for being clamped and fixed in an opening slot of a stator core. The opening slot penetrates the stator core along the radial direction of the stator core, and the stator slot wedge seals the top opening of the opening slot. The stator slot wedge includes an insertion end and a positioning end. The insertion end and the positioning end are respectively located at both ends of the stator slot wedge along the radial direction of the stator core. A positioning structure is provided on the positioning end, and the positioning structure can abut against the outer circumferential surface of the stator core. For the stator slot wedge provided by the present utility model, when it is necessary to clamp and install the stator slot wedge in the opening slot, first align the insertion end of the stator slot wedge with the opening slot, and then push the stator slot wedge into the opening slot from the outside to the inside along the radial direction of the stator core until the positioning structure on the positioning end abuts against the outer circumferential surface of the stator core, realizing the positioning installation of the stator slot wedge in the opening slot, ensuring the accuracy of the installation position of the stator slot wedge in the opening slot, and improving the reliability of the stator.

[0022] The present utility model also provides a stator. By applying the above stator slot wedge, when it is necessary to clamp and install the stator slot wedge in the opening slot, first align the insertion end of the stator slot wedge with the opening slot, and then push the stator slot wedge into the opening slot from the outside to the inside along the radial direction of the stator core until the positioning structure on the positioning end abuts against the outer circumferential surface of the stator core, realizing the positioning installation of the stator slot wedge in the opening slot, ensuring the accuracy of the installation position of the stator slot wedge in the opening slot, and improving the reliability of the stator. Brief Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of the stator provided by an embodiment of the present utility model;

[0024] Figure 2 is an exploded structural diagram of the stator provided by an embodiment of the present utility model;

[0025] Figure 3 is a schematic structural diagram of the stator slot wedge provided by an embodiment of the present utility model;

[0026] Figure 4 is Figure 2 an enlarged structural diagram of part A in

[0027] Figure 5 is an exploded structural diagram of the stator slot wedge provided by an embodiment of the present utility model.

[0028] In the figure:

[0029] 10. Stator slot wedge; 20. Stator core; 201. Opening slot; 202. Clamping groove;

[0030] 1. Magnetic conduction part; 11. First end; 12. Second end; 13. Clamping protrusion;

[0031] 2. Non-magnetic part; 21. Main body part; 22. First limiting part; 221. Positioning structure; 2211. Positioning protrusion; 23. Second limiting part. Detailed implementation mode

[0032] To make the technical problems solved by the present utility model, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the present utility model will be further described below with reference to the drawings and through specific implementation modes.

[0033] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0034] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above the top of", and "on the top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below the bottom of", and "under the bottom of" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.

[0035] In the description of this embodiment, the orientation or positional relationship terms such as "above", "below", "left", and "right" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] Such as Figures 1 to 3As shown in the figure, this embodiment provides a stator slot wedge 10, which is used to be clamped and fixed in the opening slot 201 of the stator core 20. The opening slot 201 penetrates the stator core 20 along the radial direction of the stator core 20, and the stator slot wedge 10 seals the top opening of the opening slot 201. The stator slot wedge 10 includes an insertion end and a positioning end. The insertion end and the positioning end are respectively located at both ends of the stator slot wedge 10 along the radial direction of the stator core 20. A positioning structure 221 is provided on the positioning end, and the positioning structure 221 can abut against the outer circumferential surface of the stator core 20. For the stator slot wedge 10 provided in this embodiment, when the stator slot wedge 10 needs to be clamped and installed in the opening slot 201, first align the insertion end of the stator slot wedge 10 with the opening slot 201, and then push the stator slot wedge 10 into the opening slot 201 from the outside to the inside along the radial direction of the stator core 20 until the positioning structure 221 on the positioning end abuts against the outer circumferential surface of the stator core 20, realizing the positioning installation of the stator slot wedge 10 in the opening slot 201, ensuring the accuracy of the installation position of the stator slot wedge 10 in the opening slot 201, and improving the reliability of the stator.

[0037] As Figure 1 and Figure 2 shown in the figure, this embodiment also provides a stator, which includes a stator core 20 and the above-mentioned stator slot wedge 10. A plurality of opening slots 201 are circumferentially spaced apart on the stator core 20, and a stator slot wedge 10 is provided in each opening slot 201. By applying the above-mentioned stator slot wedge 10 to the stator provided in this embodiment, when the stator slot wedge 10 needs to be clamped and installed in the opening slot 201, first align the insertion end of the stator slot wedge 10 with the opening slot 201, and then push the stator slot wedge 10 into the opening slot 201 from the outside to the inside along the radial direction of the stator core 20 until the positioning structure 221 on the positioning end abuts against the outer circumferential surface of the stator core 20, realizing the positioning installation of the stator slot wedge 10 in the opening slot 201, ensuring the accuracy of the installation position of the stator slot wedge 10 in the opening slot 201, and improving the reliability of the stator.

[0038] Optionally, in this embodiment, as Figure 3 and Figure 4 shown in the figure, the positioning structure 221 includes a positioning protrusion 2211. The positioning protrusion 2211 is provided on the positioning end, and the positioning protrusion 2211 can abut against the outer circumferential surface of the stator core 20. By designing the positioning structure 221 in the form of a positioning protrusion 2211, not only is the structure simple, but also the reliable positioning of the installation position of the stator slot wedge 10 is realized.

[0039] Optionally, in this embodiment, as Figure 3 and Figure 4As shown, the positioning structure 221 includes two positioning protrusions 2211, and the two outer side walls of the positioning end along the width direction of the stator slot wedge 10 are both provided with the positioning protrusions 2211. The above setting further ensures the reliability of positioning the installation position of the stator slot wedge 10.

[0040] In this embodiment, as Figure 3 and Figure 5 shown, the stator slot wedge 10 further includes a magnetic conductive part 1 and a non-magnetic conductive part 2. Among them, the outer side wall of the magnetic conductive part 1 is clamped and magnetically connected to the inner side wall of the open slot 201, and the magnetic conductive part 1 is provided on the non-magnetic conductive part 2. Since the slot of the stator core 20 is of the open slot 201 structure, it is convenient for winding insertion. In addition, by providing the magnetic conductive part 1, the magnetic conductive part 1 in the stator slot wedge 10 and the open slot 201 cooperate to play the role of a semi-open slot, thereby improving the electromagnetic performance of the stator. In addition, the non-magnetic conductive part 2 in the stator slot wedge 10 plays a role in limiting the winding, and it is not necessary to set the entire stator slot wedge 10 to be a magnetic conductive structure, reducing the eddy current phenomenon, thereby improving the efficiency of the motor.

[0041] Specifically, in this embodiment, the magnetic conductive part 1 can be made of silicon steel sheet material, and the non-magnetic conductive part 2 is injection molded with plastic material. The plastic material can select a suitable plastic material according to the use environment and temperature of the motor, including but not limited to plastic materials such as PP, PA, POM, PPA, PPS, PES, PEI, and PEEK.

[0042] In this embodiment, as Figure 3 and Figure 5 shown, the two ends of the magnetic conductive part 1 along the radial direction of the stator core 20 are respectively a first end 11 and a second end 12. The non-magnetic conductive part 2 includes a connected main body part 21 and a first limiting part 22. The magnetic conductive part 1 is provided on the main body part 21. The first limiting part 22 fits the end face of the first end 11, and the first limiting part 22 is the positioning end. By making the positioning end fit the end face of the first end 11, the installation position of the magnetic conductive part 1 is fixedly limited.

[0043] In addition, in this embodiment, the non-magnetic conductive part 2 further includes a second limiting part 23. The second limiting part 23 and the first limiting part 22 are arranged at intervals along the radial direction of the stator core 20. The second limiting part 23 is connected to the main body part 21. The second limiting part 23 fits the end face of the second end 12, and the second limiting part 23 is the insertion end. The above setting enables the first limiting part 22 and the second limiting part 23 to cooperate with each other to fixedly limit the two ends of the magnetic conductive part 1, further ensuring the accuracy of the installation position of the magnetic conductive part 1.

[0044] Optionally, in this embodiment, as Figure 1As shown, the second limiting portion 23 extends outwardly from the inner side of the stator core 20 to form an opening groove 201. With the above arrangement, it effectively prevents the magnetic conduction portion 1 from extending out of the opening groove 201, thus optimizing the magnetic circuit and reducing the waste of the magnetic circuit.

[0045] Optionally, in this embodiment, as Figure 4 and Figure 5 shown, a clamping protrusion 13 is provided on the outer side wall of the magnetic conduction portion 1 along the width direction of the stator slot wedge 10, and the clamping protrusion 13 is clamped in the clamping groove 202 on the inner side wall of the opening groove 201. By providing the clamping protrusion 13 to correspond to the clamping groove 202 on the inner side wall of the opening groove 201, the limiting and fixing effects on the entire stator slot wedge 10 are achieved.

[0046] Optionally, in this embodiment, as Figure 4 and Figure 5 shown, the stator slot wedge 10 includes two magnetic conduction portions 1 arranged at intervals along the width direction of the stator slot wedge 10, and the outer side walls of each magnetic conduction portion 1 are clamped and magnetically connected to the clamping grooves 202 on the corresponding sides of the opening groove 201. By arranging the two magnetic conduction portions 1 at intervals, and each magnetic conduction portion 1 is clamped and magnetically connected to the clamping grooves 202 on the corresponding sides of the opening groove 201, the function of the semi-open slot is better exerted, and the electromagnetic performance of the stator is improved. In addition, since there are magnetic conduction portions 1 on both sides of the stator slot wedge 10 along its width direction, there are clamping protrusions 13 on both sides of the stator slot wedge 10 along its width direction, and the clamping protrusions 13 on both sides are respectively clamped with the clamping grooves 202 on the corresponding sides, further ensuring the stability and reliability of the clamping and positioning of the stator slot wedge 10 in the opening groove 201. It should be noted that in this embodiment, along the width direction of the stator slot wedge 10, the positioning protrusion 2211 extends out of the corresponding clamping protrusion 13 to ensure that the positioning protrusion 2211 abuts against the outer circumferential surface of the stator core 20.

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A stator slot wedge, characterized in that: The stator slot wedge is used to be clamped and fixed in an open slot (201) of a stator core (20); the open slot (201) penetrates the stator core (20) along a radial direction of the stator core (20), and the stator slot wedge is sealed at a top opening of the open slot (201); The stator slot wedge comprises an insertion end and a positioning end, wherein the insertion end and the positioning end are respectively located at two ends of the stator slot wedge along the radial direction of the stator core (20), and a positioning structure (221) is provided on the positioning end, and the positioning structure (221) can abut against the outer circumferential surface of the stator core (20).

2. The stator slot wedge according to claim 1, characterized in that: The positioning structure (221) comprises a positioning protrusion (2211), the positioning protrusion (2211) is arranged at the positioning end, and the positioning protrusion (2211) can abut against the outer circumferential surface of the stator core (20).

3. The stator slot wedge according to claim 2, characterized in that: The positioning structure (221) comprises two positioning protrusions (2211), and the positioning protrusions (2211) are both arranged on two outer side walls of the positioning end along the width direction of the stator slot wedge.

4. The stator slot wedge according to any one of claims 1 to 3, characterized in that: The stator slot wedge also includes: A magnetic conductive portion (1), the outer side wall of the magnetic conductive portion (1) being snap-fitted with the inner side wall of the opening groove (201) and being magnetically connected; and A non-magnetic conductive part (2), wherein the magnetic conductive part (1) is arranged on the non-magnetic conductive part (2).

5. The stator slot wedge according to claim 4, characterized in that: The two ends of the magnetic conductive part (1) along the radial direction of the stator core (20) are respectively a first end (11) and a second end (12); the non-magnetic conductive part (2) comprises a main body (21) and a first limiting part (22) connected to each other; the magnetic conductive part (1) is arranged on the main body (21); the first limiting part (22) is in contact with the end surface of the first end (11); and the first limiting part (22) is the positioning end.

6. The stator slot wedge according to claim 5, characterized in that: The non-magnetic conductive portion (2) further comprises a second limiting portion (23), wherein the second limiting portion (23) and the first limiting portion (22) are arranged at intervals along the radial direction of the stator core (20), the second limiting portion (23) is connected to the main body portion (21), the second limiting portion (23) is in contact with the end surface of the second end (12), and the second limiting portion (23) is the insertion end.

7. The stator slot wedge according to claim 6, characterized in that: The second limiting portion (23) extends out of the opening slot (201) toward the inside of the stator core (20).

8. The stator slot wedge according to claim 4, characterized in that: A clamping protrusion (13) is provided on the outer side wall of the magnetic conductive portion (1) along the width direction of the stator slot wedge, and the clamping protrusion (13) is clamped in a clamping groove (202) on the inner side wall of the opening slot (201).

9. The stator slot wedge according to claim 8, characterized in that: The stator slot wedge comprises two magnetic conductive parts (1) which are arranged at intervals along the width direction of the stator slot wedge.

10. A stator, characterized in that: It comprises a stator core (20) and the stator slot wedge according to any one of claims 1 to 9, wherein the stator core (20) is provided with a plurality of open slots (201) spaced apart along its circumferential direction, and each of the open slots (201) is provided with one of the stator slot wedges.

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