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 two ends of the stator slot wedge in the radial direction of the stator iron core are an insertion end and a tail end respectively. The width of the stator slot wedge is gradually reduced from the tail end to the insertion end. According to the stator provided by the utility model, by applying the stator slot wedge, 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 iron core; as the width size of the stator slot wedge is gradually reduced from the tail end to the insertion end, the stator slot wedge can be pushed into the open slot towards the interior of the stator core more conveniently, so that the stator slot wedge is more convenient to install, and the winding inserting efficiency is also improved.

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 maximize the performance of the motor is the semi-open slot, which can not only achieve the magnetic concentration 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 to play the role of a semi-open slot. However, it is difficult to install the stator slot wedge in the open slot, which greatly reduces the efficiency of winding insertion.

[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 that the installation of the stator slot wedge in the open slot is more convenient and the efficiency of winding insertion is improved.

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

[0007] A stator slot wedge is used for clamping and fixing in an open slot of a stator iron core. The open slot penetrates 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 two ends of the stator slot wedge along the radial direction of the stator iron core are respectively an insertion end and a tail end, and the width dimension of the stator slot wedge gradually decreases from the tail end to the insertion end.

[0009] As an optional solution, guiding inclined surfaces are arranged on the two outer side walls of the insertion end along the width direction of the stator slot wedge, and the guiding inclined surfaces incline towards the inside of the stator slot wedge from one end close to the tail end to the end of the insertion end.

[0010] As an optional solution, the stator slot wedge includes a non-magnetic part, and the non-magnetic part includes a main body part, a first limiting part and a second limiting part. The first limiting part and the second limiting part are arranged at intervals along the radial direction of the stator iron core, and both the first limiting part and the second limiting part are connected to the main body part. The first limiting part is located at the insertion end, and the second limiting part is located at the tail end.

[0011] As an alternative, the stator slot wedge further includes a magnetic conductive part, which is arranged on the main body part, is used for magnetically communicating with the groove wall of the open slot, and is located between the first limiting part and the second limiting part.

[0012] As an alternative, the stator slot wedge includes two magnetic conductive parts arranged at intervals along the width direction of the stator slot wedge.

[0013] As an alternative, the magnetic conductive part includes a plurality of magnetic conductive sheets stacked and fixed in sequence along the radial direction of the stator core. Adjacent two magnetic conductive sheets are insulated from each other, and the outer side wall of the magnetic conductive sheet is clamped and magnetically communicated with the inner side wall of the open slot.

[0014] As an alternative, the plurality of magnetic conductive sheets are stacked and formed by an overlapping riveting forming process to form the magnetic conductive part;

[0015] Or, the plurality of magnetic conductive sheets are stacked and formed by a process of fixing with pins to form the magnetic conductive part.

[0016] As an alternative, the plurality of magnetic conductive sheets are stacked and formed by a process of fixing with pins. A through-hole for fixing is arranged on each magnetic conductive sheet, and the fixing pins are sequentially passed through and fixed in the through-holes for fixing of the plurality of magnetic conductive sheets.

[0017] As an alternative, clamping protrusions are arranged on two outer side walls of the stator slot wedge along its width direction, and the clamping protrusions are clamped in clamping grooves on the inner side wall of the open slot.

[0018] 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.

[0019] The beneficial effects of the utility model:

[0020] The 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 through 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 two ends of the stator slot wedge along the radial direction of the stator core are respectively an insertion end and a tail end, and the width dimension of the stator slot wedge gradually decreases from the tail end to the insertion end. For the stator slot wedge provided by the utility model, when the stator slot wedge needs to be clamped and installed 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 outside to inside along the radial direction of the stator core. Since the width dimension of the stator slot wedge gradually decreases from the tail end to the insertion end, it is more convenient to push the stator slot wedge towards the inside of the stator core into the opening slot, making the installation of the stator slot wedge more convenient and also improving the efficiency of winding insertion.

[0021] The utility model also provides a stator. By applying the above-mentioned stator slot wedge, when the stator slot wedge needs to be clamped and installed 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 outside to inside along the radial direction of the stator core. Since the width dimension of the stator slot wedge gradually decreases from the tail end to the insertion end, it is more convenient to push the stator slot wedge towards the inside of the stator core into the opening slot, making the installation of the stator slot wedge more convenient and also improving the efficiency of winding insertion. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of a stator provided in Embodiment 1 of the utility model;

[0023] Figure 2 is a top view of the stator slot wedge provided in Embodiment 1 of the utility model;

[0024] Figure 3 is an axonometric view of the stator slot wedge provided in Embodiment 1 of the utility model;

[0025] Figure 4 is a schematic structural diagram of a magnetic conduction part provided in Embodiment 1 of the utility model;

[0026] Figure 5 is a schematic structural diagram of a magnetic conduction part provided in Embodiment 2 of the utility model.

[0027] In the figure:

[0028] 10. Stator slot wedge; 20. Stator core; 201. Opening slot;

[0029] 1. Magnetic conduction part; 11. Magnetic conduction sheet; 12. Fixed pin; 13. Clamping protrusion;

[0030] 2. Non-magnetic conduction part; 21. Main body part; 22. First limiting part; 221. Guide inclined surface; 23. Second limiting part. Detailed implementation manners

[0031] 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 accompanying drawings and through specific implementation manners.

[0032] In the description of the present utility model, unless otherwise clearly specified and defined, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. 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 circumstances.

[0033] In the present utility model, unless otherwise clearly specified and defined, 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 therebetween. Moreover, the first feature being "above", "above the", and "on the" second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below the", and "under the" second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0034] 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 accompanying 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 do not have special meanings.

[0035] Embodiment 1

[0036] As Figures 1 to 3As shown, this embodiment provides a stator slot wedge 10. The stator slot wedge 10 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 blocks the top opening of the opening slot 201. The two ends of the stator slot wedge along the radial direction of the stator core 20 are respectively an insertion end and a tail end, and the width dimension of the stator slot wedge gradually decreases from the tail end to the insertion end. 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. Since the width dimension of the stator slot wedge 10 gradually decreases from the tail end to the insertion end, it is more convenient to push the stator slot wedge 10 into the opening slot 201 towards the inside of the stator core 20, making the installation of the stator slot wedge 10 more convenient and also improving the efficiency of winding wire insertion.

[0037] As Figure 1 shown, this embodiment also provides a stator. The stator includes a stator core 20 and the above-mentioned stator slot wedge 10. A plurality of opening slots 201 are circumferentially spaced on the stator core 20, and a stator slot wedge 10 is provided in each opening slot 201. For the stator provided in this embodiment, by applying the above-mentioned stator slot wedge 10, 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. Since the width dimension of the stator slot wedge 10 gradually decreases from the tail end to the insertion end, it is more convenient to push the stator slot wedge 10 into the opening slot 201 towards the inside of the stator core 20, making the installation of the stator slot wedge 10 more convenient and also improving the efficiency of winding wire insertion.

[0038] Optionally, in this embodiment, as Figure 2 and Figure 3 shown, guiding inclined surfaces 221 are provided on both outer sidewalls of the insertion end along the width direction of the stator slot wedge 10. The guiding inclined surfaces 221 incline towards the inside of the stator slot wedge 10 from one end close to the tail end to the end of the insertion end. The above setting makes the width dimension of the insertion end gradually decrease from the outside to the inside of the stator core 20, providing a guiding effect for the insertion operation of the insertion end in the opening slot 201, making it more convenient to insert the stator slot wedge 10 into the opening slot 201, making the installation of the stator slot wedge 10 more convenient and further improving the efficiency of winding wire insertion.

[0039] In this embodiment, as Figure 2 and Figure 3As shown in the figure, the stator slot wedge 10 includes a non-magnetic portion 2. The non-magnetic portion 2 includes a main body portion 21, a first limiting portion 22, and a second limiting portion 23. The first limiting portion 22 and the second limiting portion 23 are arranged at intervals in the radial direction of the stator core 20, and both the first limiting portion 22 and the second limiting portion 23 are connected to the main body portion 21. The first limiting portion 22 is located at the insertion end, and the second limiting portion 23 is located at the tail end. It should be noted that since the first limiting portion 22 is located at the insertion end, that is, guiding inclined surfaces 221 are provided on both outer sidewalls of the first limiting portion 22 along the width direction of the stator slot wedge 10.

[0040] In addition, in this embodiment, the stator slot wedge 10 further includes a magnetic conducting portion 1. The magnetic conducting portion 1 is arranged on the main body portion 21. The magnetic conducting portion 1 is used for magnetic communication with the groove wall of the open slot 201, and the magnetic conducting portion 1 is located between the first limiting portion 22 and the second limiting portion 23. In this embodiment, by designing the stator slot wedge 10 in the form of a connected magnetic conducting portion 1 and a non-magnetic portion 2, the magnetic conducting portion 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 portion 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 conducting structure, reducing the eddy current phenomenon, thereby improving the efficiency of the motor. In addition, by arranging the magnetic conducting portion 1 between the first limiting portion 22 and the second limiting portion 23, the non-magnetic portion 2 wraps both ends of the magnetic conducting portion 1, playing a role in fixing and limiting both ends of the magnetic conducting portion 1.

[0041] Optionally, in this embodiment, the stator slot wedge 10 includes two magnetic conducting portions 1 arranged at intervals along the width direction of the stator slot wedge 10. Specifically, the outer sidewall of each magnetic conducting portion 1 is clamped and magnetically communicated with the inner sidewall of the corresponding side of the open slot 201. By arranging the two magnetic conducting portions 1 at intervals and each magnetic conducting portion 1 being magnetically communicated with the inner sidewall of the open slot 201, the role of a semi-open slot is better played, improving the electromagnetic performance of the stator. In addition, the above setting makes both sides of the stator slot wedge 10 along its width direction clamped with the inner sidewall of the open slot 201, ensuring the reliability and stability of the clamping and positioning of the stator slot wedge 10 in the open slot 201.

[0042] It should be noted that, in this embodiment, as Figure 1 shown, when the stator slot wedge 10 is installed into the open slot 201, the first limiting portion 22 extends outward from the open slot 201 towards the inside of the stator core 20, and the second limiting portion 23 extends outward from the open slot 201 towards the outside of the stator core 20. In addition, when the end face of the second limiting portion 23 facing the stator core 20 abuts against the outer circumferential surface of the stator core 20, it proves that the stator slot wedge 10 is inserted in place at this time, thus ensuring the positioning and installation of the stator slot wedge 10 in the open slot 201.

[0043] Optionally, in this embodiment, as Figure 2 and Figure 3 shown, on both outer side walls of the stator slot wedge 10 along its width direction, engaging protrusions 13 are provided, and the engaging protrusions 13 are engaged in the engaging grooves on the inner side wall of the opening slot 201. By providing the engaging protrusions 13 to correspond to the engaging grooves on the inner side wall of the opening slot 201, the limiting and fixing effects on the entire stator slot wedge 10 are achieved. It should be noted that in this embodiment, engaging protrusions 13 are provided on the outer side walls of each magnetic conduction portion 1, so as to ensure that engaging protrusions 13 are provided on both outer side walls of the stator slot wedge 10 along its width direction.

[0044] Optionally, as Figure 4 shown, the magnetic conduction portion 1 provided in this embodiment includes a plurality of magnetic conduction sheets 11 stacked and fixed in sequence along the radial direction of the stator core 20. Adjacent two magnetic conduction sheets 11 are insulated from each other, and the outer side wall of the magnetic conduction sheet 11 is engaged with and magnetically connected to the inner side wall of the opening slot 201. By designing the magnetic conduction portion 1 in the form of a plurality of insulated stacked magnetic conduction sheets 11, compared with the structural form of a whole magnetic conduction portion 1, the impedance of the magnetic conduction portion 1 is effectively increased, thereby further reducing the eddy current loss of the stator slot wedge 10. It should be noted that engaging protrusions 13 are provided on the outer side wall of each magnetic conduction sheet 11.

[0045] In this embodiment, as Figure 4 shown, a plurality of magnetic conduction sheets 11 are stacked and formed by a stacked riveting forming process to form the magnetic conduction portion 1. The stacked riveting forming process has the advantage of being easy to process. Specifically, a continuous silicon steel sheet coil can be first fed into a stacked riveting die, and the required shape can be obtained through blanking once or multiple times, so as to form the magnetic conduction sheet 11 with the required shape. Then, a plurality of magnetic conduction sheets 11 are stacked and riveted up and down to form the magnetic conduction portion 1 with the required length dimension. In addition, an insulating material can be coated at the portion where adjacent two magnetic conduction sheets 11 are stacked and attached to ensure that adjacent two magnetic conduction sheets 11 are insulated from each other.

[0046] Optionally, in this embodiment, the thickness of each magnetic conduction sheet 11 can be 0.1 mm to 0.5 mm, and the specific number of magnetic conduction sheets 11 included in each magnetic conduction portion 1 can be set according to specific requirements. It is preferable that the length dimension of the magnetic conduction portion 1 does not exceed 10 times the width dimension of the magnetic conduction portion 1.

[0047] In addition, it should be noted that when multiple magnetic conductive sheets 11 are stacked and formed by the process of stacked riveting, among two adjacent stacked magnetic conductive sheets 11, one is provided with a positioning protrusion and the other is provided with a positioning groove. The positioning protrusion is inserted and fixed in the positioning groove, so as to form a riveting point between two adjacent magnetic conductive sheets 11, which is convenient to realize the stacked fixation between two adjacent magnetic conductive sheets 11. It should be noted that the number of riveting points formed between two adjacent magnetic conductive sheets 11 in this embodiment is not specifically limited.

[0048] Embodiment 2

[0049] The stator slot wedge 10 provided in this embodiment is basically the same as that in Embodiment 1. The difference between the stator slot wedge 10 provided in this embodiment and that in Embodiment 1 lies in:

[0050] In this embodiment, as Figure 5 shown, multiple magnetic conductive sheets 11 are stacked and formed by the process of needle threading and fixing to form a magnetic conductive part 1. The above setting effectively ensures the structural stability and reliability of the magnetic conductive part 1. Specifically, each magnetic conductive sheet 11 is provided with a threading and fixing hole, and the fixing needle 12 is sequentially threaded and fixed in the threading and fixing holes of multiple magnetic conductive sheets 11.

[0051] Specifically, a continuous silicon steel sheet coil can be first fed into a punching die, and the required shape can be obtained through blanking, so as to form a magnetic conductive sheet 11 with the required shape, and a threading and fixing hole is punched on each magnetic conductive sheet 11. Multiple magnetic conductive sheets 11 are stacked up and down and pressed tightly. The fixing needle 12 is passed through each threading and fixing hole, and finally, press riveting and fixing are carried out at both ends of the fixing needle 12, so as to obtain the required magnetic conductive part 1.

[0052] Optionally, in this embodiment, the thickness of each magnetic conductive sheet 11 can be 0.1 mm to 0.5 mm. It is preferable that the length dimension of the magnetic conductive part 1 does not exceed 15 times the width dimension of the magnetic conductive part 1, so as to ensure the straightness and stiffness of the magnetic conductive part 1 and also ensure the operability of the magnetic conductive part 1.

[0053] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, rather than limiting 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 on the basis of 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 in 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 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 seals the top opening of the opening slot (201); The two ends of the stator slot wedge along the radial direction of the stator core (20) are respectively an insertion end and a tail end, and the width dimension of the stator slot wedge gradually decreases from the tail end to the insertion end.

2. The stator slot wedge according to claim 1, characterized in that, Guide inclined surfaces (221) are provided on both outer side walls of the insertion end along the width direction of the stator slot wedge. The guide inclined surfaces (221) incline towards the inside of the stator slot wedge from one end close to the tail end to the end of the insertion end.

3. The stator slot wedge according to claim 2, characterized in that, The stator slot wedge includes a non-magnetic part (2). The non-magnetic part (2) includes a main body part (21), a first limiting part (22) and a second limiting part (23). The first limiting part (22) and the second limiting part (23) are arranged at intervals along the radial direction of the stator core (20), and both the first limiting part (22) and the second limiting part (23) are connected to the main body part (21). The first limiting part (22) is located at the insertion end, and the second limiting part (23) is located at the tail end.

4. The stator slot wedge according to claim 3, characterized in that, The stator slot wedge further includes a magnetic part (1). The magnetic part (1) is arranged on the main body part (21). The magnetic part (1) is used for magnetic communication with the inner wall of the opening slot (201), and the magnetic part (1) is located between the first limiting part (22) and the second limiting part (23).

5. The stator slot wedge according to claim 4, characterized in that, The stator slot wedge includes two magnetic parts (1) arranged at intervals along the width direction of the stator slot wedge.

6. The stator slot wedge according to claim 4, wherein The magnetic part (1) includes a plurality of magnetic sheets (11) stacked and fixed in sequence along the radial direction of the stator core (20). Adjacent two magnetic sheets (11) are insulated from each other, and the outer side wall of the magnetic sheet (11) is clamped and in magnetic communication with the inner side wall of the opening slot (201).

7. The stator slot wedge according to claim 6, wherein The plurality of magnetic sheets (11) are stacked and formed by an overlapping riveting forming process to form the magnetic part (1); Or, the plurality of magnetic sheets (11) are stacked and formed by a process of fixing with a needle to form the magnetic part (1).

8. The stator slot wedge according to claim 7, wherein The plurality of magnetic sheets (11) are stacked and formed by a process of fixing with a needle. A fixing hole for passing through is provided on each magnetic sheet (11), and a fixing needle (12) is sequentially passed through and fixed in the fixing holes for passing through of the plurality of magnetic sheets (11).

9. The stator slot wedge according to any one of claims 1 to 8, characterized in that, Clamping protrusions (13) are provided on both outer side walls of the stator slot wedge along its width direction. The clamping protrusions (13) are clamped in the clamping grooves on the inner side wall of the opening slot (201).

10. A stator, characterized in that, It includes a stator core (20) and the stator slot wedge according to any one of claims 1 to 9. A plurality of opening slots (201) are spaced apart along the circumferential direction of the stator core (20), and one stator slot wedge is arranged in each opening slot (201).

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