Slot wedge injection mold

Abstract

The utility model relates to the technical field of motor processing and production, in particular to a slot wedge injection mold. The slot wedge injection mold provided by the utility model is used for integrally injecting a non-magnetic conductive part in a slot wedge on a magnetic conductive part in the slot wedge, the slot wedge injection mold comprises an upper mold and a lower mold, the upper mold and the lower mold can be buckled and fixed, and a cavity of the upper mold and a cavity of the lower mold are spliced together to form a mold cavity; the outer contour of the die cavity is matched with the outer contour of the slot wedge. According to the utility model, the slot wedge is subjected to injection molding processing through the slot wedge injection mold, and the magnetic conductive part and the non-magnetic conductive part in the slot wedge do not need to be independently processed and then bonded together, so that the processing difficulty and the processing cost of the slot wedge are reduced. Besides, according to the slot wedge injection mold, the non-magnetic-conductive part in the slot wedge is integrally injected on the magnetic-conductive part in the slot wedge, so that the bonding strength of the non-magnetic-conductive part and the magnetic-conductive part is effectively enhanced, and the structural strength of the whole slot wedge is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor processing and production, in particular to a slot wedge injection mold. Background Art

[0002] In the prior art, the slot wedge in the stator usually includes a magnetic conductive part and a non-magnetic conductive part. The magnetic conductive part and the non-magnetic conductive part are processed separately and then glued and fixed. The magnetic conductive part in the slot wedge cooperates with the open slot in the open slot of the stator core, thereby playing the role of a semi-open slot. The setting of the non-magnetic conductive part not only ensures the limitation of the winding, but also can effectively reduce the eddy current phenomenon and improve the efficiency of the motor. However, the above-mentioned processing method of the slot wedge increases the processing difficulty and processing cost of the entire slot wedge. In addition, the fixing of the magnetic conductive part and the non-magnetic conductive part by gluing also makes it easy to separate the magnetic conductive part and the non-magnetic conductive part, which reduces the structural strength of the entire slot wedge.

[0003] Therefore, a slot wedge injection mold is urgently needed to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a slot wedge injection mold, so that the non-magnetic conductive part in the slot wedge can be integrally injection-molded onto the magnetic conductive part in the slot wedge, thereby reducing the processing difficulty and processing cost of the slot wedge, enhancing the bonding strength between the non-magnetic conductive part and the magnetic conductive part, and improving the structural strength of the entire slot wedge.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A slot wedge injection mold, the slot wedge injection mold is used to integrally inject a non-magnetic conductive part in a slot wedge onto a magnetic conductive part in the slot wedge, the slot wedge injection mold comprising:

[0007] Upper mold; and

[0008] The lower mold, the upper mold and the lower mold can be fastened and fixed, and the cavity of the upper mold and the cavity of the lower mold are assembled together to form a mold cavity, and the outer contour of the mold cavity is adapted to the outer contour of the slot wedge.

[0009] As an optional solution, the inner wall of the mold cavity includes a first inner side wall and a second inner side wall, and the first inner side wall and the second inner side wall are arranged relatively spaced apart along the width direction of the mold cavity, and along the length direction of the mold cavity, the distance between the first inner side wall and the second inner side wall gradually decreases or increases.

[0010] As an optional solution, the first inner side wall includes a first side wall portion and a second side wall portion connected to each other, the second inner side wall includes a third side wall portion and a fourth side wall portion connected to each other, the first side wall portion and the third side wall portion are symmetrically arranged with the central axis of the mold cavity as the symmetry axis, and the second side wall portion and the fourth side wall portion are symmetrically arranged with the central axis of the mold cavity as the symmetry axis;

[0011] The first side wall portion is inclined toward the interior of the mold cavity from an end away from the second side wall portion to an end connected to the second side wall portion, and the second side wall portion is inclined toward the interior of the mold cavity from an end connected to the first side wall portion to an end away from the first side wall portion, and the inclination angle of the first side wall portion is different from the inclination angle of the second side wall portion.

[0012] As an optional solution, the mold cavity includes:

[0013] a main body cavity; and

[0014] The clamping cavity is communicated with the main body cavity and is used to accommodate the clamping protrusion on the outer side wall of the magnetic conductive part.

[0015] As an optional solution, the inner wall of the clamping cavity includes a lap wall, the lap wall is located in the cavity of the lower mold, and the lap wall is used to support the clamping protrusion.

[0016] As an optional solution, the inner top wall of the mold cavity includes a first top wall and a second top wall, the height of the first top wall is lower than the height of the second top wall, the first top wall is in contact with the upper end surface of the magnetic conductive part, and the second top wall is in contact with the upper end surface of the non-magnetic conductive part.

[0017] As an optional solution, the slot wedge injection mold further includes:

[0018] An injection molding pipeline is communicated with the mold cavity.

[0019] As an optional solution, the cavity of the upper mold and the cavity of the lower mold are assembled together to form a plurality of mold cavities, the plurality of mold cavities are arranged at intervals, and an injection runner connected to the plurality of mold cavities is provided inside the slot wedge injection mold, and the injection pipe is connected to the plurality of mold cavities through the injection runner.

[0020] As an optional solution, the slot wedge injection mold further includes:

[0021] A protrusion assembly is disposed in the inner cavity of the upper mold, and the protrusion assembly is configured to position the magnetic conductive portion placed in the cavity of the lower mold at a preset position.

[0022] As an optional solution, the protrusion assembly includes two protrusions arranged at intervals along the length direction of the mold cavity, and the protrusions are arranged in the inner cavity of the upper mold. When the upper mold and the lower mold are buckled and fixed, the two ends of the magnetic conductive part in the length direction respectively abut against the two protrusions.

[0023] Beneficial effects of the utility model:

[0024] The utility model provides a slot wedge injection mold, which is used to integrally inject the non-magnetic conductive part of the slot wedge onto the magnetic conductive part of the slot wedge. The slot wedge injection mold includes an upper mold and a lower mold, which can be fastened and fixed, and the cavity of the upper mold and the cavity of the lower mold are assembled together to form a mold cavity, and the outer contour of the mold cavity is adapted to the outer contour of the slot wedge. The utility model uses a slot wedge injection mold to injection-mold the slot wedge, and there is no need to independently process the magnetic conductive part and the non-magnetic conductive part of the slot wedge and then bond them together, thereby reducing the processing difficulty and processing cost of the slot wedge. In addition, the slot wedge injection mold effectively enhances the bonding strength between the non-magnetic conductive part and the magnetic conductive part by integrally injecting the non-magnetic conductive part of the slot wedge onto the magnetic conductive part of the slot wedge, thereby improving the structural strength of the entire slot wedge. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the slot wedge injection mold provided by an embodiment of the utility model;

[0026] Figure 2 This is a structural cross-sectional view of the slot wedge injection mold provided by the embodiment of the utility model Figure 1 ;

[0027] Figure 3 yes Figure 2 A magnified view of the structure at B in the middle;

[0028] Figure 4 It is a top view of a partial structure of a slot wedge injection mold provided by an embodiment of the utility model;

[0029] Figure 5 This is a structural cross-sectional view of the slot wedge injection mold provided by the embodiment of the utility model Figure 2 ;

[0030] Figure 6 yes Figure 5 A magnified view of the structure at center A;

[0031] Figure 7 This is a structural cross-sectional view of the slot wedge injection mold provided by the embodiment of the utility model Figure 3 .

[0032] In the figure:

[0033] 10. slot wedge injection mold; 20. slot wedge; 201. non-magnetic conductive part; 202. magnetic conductive part; 2021. clamping protrusion;

[0034] 1. Upper mold; 2. Lower mold; 3. Injection molding pipeline; 4. Mold cavity; 41. Main body cavity; 42. Snap-fit ​​cavity; 421. Overlap wall; 43. First inner side wall; 431. First side wall portion; 432. Second side wall portion; 44. Second inner side wall; 441. Third side wall portion; 442. Fourth side wall portion; 45. Inner top wall; 451. First top wall; 452. Second top wall; 46. Central axis; 5. Injection molding runner; 6. Protrusion assembly; 61. Protrusion piece. DETAILED DESCRIPTION

[0035] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0039] In the prior art, the slot wedge in the stator usually includes a magnetic conductive part and a non-magnetic conductive part. The magnetic conductive part and the non-magnetic conductive part are processed separately and then glued and fixed. The magnetic conductive part in the slot wedge cooperates with the open slot in the open slot of the stator core, thereby playing the role of a semi-open slot. The setting of the non-magnetic conductive part not only ensures the limitation of the winding, but also can effectively reduce the eddy current phenomenon and improve the efficiency of the motor. However, the above-mentioned processing method of the slot wedge increases the processing difficulty and processing cost of the entire slot wedge. In addition, the fixing of the magnetic conductive part and the non-magnetic conductive part by gluing also makes it easy to separate the magnetic conductive part and the non-magnetic conductive part, which reduces the structural strength of the entire slot wedge.

[0040] In order to solve the above problems, Figure 1 to Figure 3 As shown, the present embodiment provides a slot wedge injection mold 10, which is used to integrally inject the non-magnetic conductive part 201 in the slot wedge 20 onto the magnetic conductive part 202 in the slot wedge 20. Specifically, the slot wedge injection mold 10 includes an upper mold 1 and a lower mold 2, which can be fastened and fixed, and the cavity of the upper mold 1 and the cavity of the lower mold 2 are assembled together to form a mold cavity 4, and the outer contour of the mold cavity 4 is adapted to the outer contour of the slot wedge 20. The present embodiment designs a slot wedge injection mold 10, so that the slot wedge 20 is injection-molded by the slot wedge injection mold 10, and there is no need to independently process the magnetic conductive part 202 and the non-magnetic conductive part 201 in the slot wedge 20 and then bond them together, thereby reducing the processing difficulty and processing cost of the slot wedge 20. In addition, the slot wedge injection mold 10 effectively enhances the bonding strength between the non-magnetic portion 201 and the magnetic portion 202 by integrally injecting the non-magnetic portion 201 in the slot wedge 20 onto the magnetic portion 202 in the slot wedge 20 , thereby improving the structural strength of the entire slot wedge 20 .

[0041] Specifically, when the slot wedge 20 is processed and produced by the slot wedge injection mold 10, the processed magnetic conductive part 202 is first placed in the cavity of the lower mold 2, and then the upper mold 1 and the lower mold 2 are buckled and fixed, and then the rubber that can solidify into the non-magnetic conductive part 201 is injected into the mold cavity 4. When the rubber is completely solidified, the upper mold 1 and the lower mold 2 are separated, and the processed slot wedge 20 is demolded.

[0042] In addition, in this embodiment, if Figure 1 and Figure 2 As shown, the slot wedge injection mold 10 also includes an injection pipe 3, which is connected to the mold cavity 4, so that a rubber material that can solidify into the non-magnetic conductive part 201 is injected into the mold cavity 4 through the injection pipe 3.

[0043] Optionally, in this embodiment, if Figure 4As shown, the cavity of the upper mold 1 and the cavity of the lower mold 2 are assembled together to form a plurality of mold cavities 4, and the plurality of mold cavities 4 are arranged at intervals, and the interior of the slot wedge injection mold 10 is provided with an injection flow channel 5 connected to the plurality of mold cavities 4, and the injection pipe 3 is connected to the plurality of mold cavities 4 through the injection flow channel 5. By injecting rubber into the injection pipe 3, the rubber can flow into each mold cavity 4 along the injection flow channel 5, thereby realizing the injection molding of the plurality of slot wedges 20 simultaneously, and effectively improving the processing efficiency. Specifically, in this embodiment, the cavity of the upper mold 1 and the cavity of the lower mold 2 are assembled together to form four mold cavities 4. In other embodiments, only one mold cavity 4 may be provided, or two or other numbers of mold cavities 4 may be provided.

[0044] Optionally, in this embodiment, if Figure 4 As shown, the inner wall of the mold cavity 4 includes a first inner side wall 43 and a second inner side wall 44, and the first inner side wall 43 and the second inner side wall 44 are arranged relatively spaced apart along the width direction of the mold cavity 4, and the spacing between the first inner side wall 43 and the second inner side wall 44 gradually decreases or gradually increases along the length direction of the mold cavity 4. The structural design of the mold cavity 4 makes the width of the slot wedge 20 processed by injection molding gradually decrease from one end of the slot wedge 20 to the other end of the slot wedge 20 along its length direction. When the slot wedge 20 needs to be installed in the open slot of the iron core, the small head end of the slot wedge 20 (that is, the end with a smaller width dimension of the slot wedge 20) can be aligned with the open slot first, and then the slot wedge 20 can be pushed into the open slot along the length direction of the slot wedge 20, which is more convenient to push the slot wedge 20 into the open slot, so that the processed slot wedge 20 can be installed in the open slot more conveniently.

[0045] In this embodiment, if Figure 4As shown, the first inner side wall 43 includes a first side wall portion 431 and a second side wall portion 432 connected to each other, and the second inner side wall 44 includes a third side wall portion 441 and a fourth side wall portion 442 connected to each other, wherein the first side wall portion 431 and the third side wall portion 441 are symmetrically arranged with the central axis 46 of the mold cavity 4 as the symmetry axis, and the second side wall portion 432 and the fourth side wall portion 442 are symmetrically arranged with the central axis 46 of the mold cavity 4 as the symmetry axis, the first side wall portion 431 is inclined toward the interior of the mold cavity 4 from an end away from the second side wall portion 432 to an end connected to the second side wall portion 432, and the second side wall portion 432 is inclined toward the interior of the mold cavity 4 from an end connected to the first side wall portion 431 to an end away from the first side wall portion 431, and the inclination angle of the first side wall portion 431 is different from the inclination angle of the second side wall portion 432. The above arrangement ensures that the spacing between the first inner side wall 43 and the second inner side wall 44 gradually decreases or increases along the length direction of the mold cavity 4. In addition, the above arrangement ensures that the side wall portion with a large inclination angle is located at the small head end of the slot wedge 20, which plays a guiding role for the small head end of the slot wedge 20 to be inserted into the open slot, making it easier to push the processed slot wedge 20 into the open slot. Optionally, in this embodiment, the second side wall portion 432 and the fourth side wall portion 442 are both located at the small head end of the slot wedge 20, and the inclination angle of the second side wall portion 432 is greater than the inclination angle of the first side wall portion 431.

[0046] In this embodiment, if Figure 3 , Figure 5 and Figure 6 As shown, the mold cavity 4 includes a main body cavity 41 and a clamping cavity 42, the clamping cavity 42 is connected to the main body cavity 41, and the clamping cavity 42 is used to accommodate the clamping protrusion 2021 on the outer wall of the magnetic conductive part 202. The structural design of the mold cavity 4 above realizes the reliable accommodation of the clamping protrusion 2021, and ensures that the clamping protrusion 2021 of the magnetic conductive part 202 exists on the side of the slot wedge 20 finally processed, thereby ensuring that the clamping protrusion 2021 corresponds to the clamping groove on the inner wall of the open slot, and realizing the limiting and fixing function of the slot wedge 20 installed in the open slot.

[0047] In addition, it should be noted that the mold cavity 4 includes two clamping cavities 42, which are spaced apart from each other along the width direction of the mold cavity 4, and each clamping cavity 42 accommodates a clamping protrusion 2021 of a magnetic conductive portion 202. The above arrangement ensures that the processed slot wedge 20 has magnetic conductive portions 202 on both sides along the width direction, so that the slot wedge 20 has clamping protrusions 2021 on both sides along the width direction, further ensuring the stability and reliability of the clamping and positioning of the slot wedge 20 in the open slot.

[0048] Specifically, in this embodiment, if Figure 6As shown, the inner wall of the snap-fit ​​cavity 42 includes a lap wall 421 , which is located in the cavity of the lower mold 2 , and is used to support the snap-fit ​​protrusion 2021 , thereby achieving stable placement of the magnetic conductive portion 202 in the cavity of the lower mold 2 .

[0049] Optionally, in this embodiment, if Figure 6 As shown, the inner top wall 45 of the mold cavity 4 includes a first top wall 451 and a second top wall 452, wherein the height of the first top wall 451 is lower than the height of the second top wall 452, the first top wall 451 is in contact with the upper end surface of the magnetic conductive part 202, and the second top wall 452 is in contact with the upper end surface of the non-magnetic conductive part 201. The structural design of the mold cavity 4 is such that the top end surface of the processed non-magnetic conductive part 201 is lower than the top end surface of the magnetic conductive part 202. Since the expansion coefficient of the non-magnetic conductive part 201 is greater than the expansion coefficient of the magnetic conductive part 202, the above arrangement can reserve expansion space for the top of the non-magnetic conductive part 201 to avoid excessive deformation of the slot wedge 20.

[0050] In addition, in this embodiment, if Figure 7 As shown, the slot wedge injection mold 10 also includes a protrusion assembly 6, which is arranged in the inner cavity of the upper mold 1. The protrusion assembly 6 is used to position the magnetic conductive part 202 placed in the cavity of the lower mold 2 at a preset position, thereby ensuring the accuracy of the placement of the magnetic conductive part 202 in the mold cavity 4 and ensuring the processing accuracy of the entire slot wedge 20.

[0051] Specifically, in this embodiment, if Figure 7 As shown, the protrusion assembly 6 includes two protrusions 61 arranged at intervals along the length direction of the mold cavity 4. The protrusions 61 are arranged in the inner cavity of the upper mold 1. When the upper mold 1 and the lower mold 2 are buckled and fixed, the two ends of the length direction of the magnetic conductive part 202 are respectively abutted against the two protrusions 61. The structural design of the above-mentioned protrusion assembly 6 limits the position of the magnetic conductive part 202 along the length direction of the mold cavity 4. Since the outer side wall of the magnetic conductive part 202 along the width direction of the mold cavity 4 directly abuts against the inner wall of the mold cavity 4, the magnetic conductive part 202 can be accurately positioned by limiting the position of the magnetic conductive part 202 along the length direction of the mold cavity 4. In addition, the structure of the above-mentioned protrusion assembly 6 is simple, which is convenient for processing and producing the slot wedge injection mold 10. Optionally, in this embodiment, the protrusion 61 can be in the form of a positioning column.

[0052] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled 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 implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A slot wedge injection mold, characterized in that: The slot wedge injection mold (10) is used to integrally inject the non-magnetic conductive portion (201) in the slot wedge (20) onto the magnetic conductive portion (202) in the slot wedge (20), and the slot wedge injection mold (10) comprises: an upper die (1); and The lower mold (2), the upper mold (1) and the lower mold (2) can be fastened and fixed, and the cavity of the upper mold (1) and the cavity of the lower mold (2) are assembled together to form a mold cavity (4), and the outer contour of the mold cavity (4) is compatible with the outer contour of the slot wedge (20).

2. The slot wedge injection mold according to claim 1, characterized in that: The inner wall of the mold cavity (4) comprises a first inner side wall (43) and a second inner side wall (44); the first inner side wall (43) and the second inner side wall (44) are arranged relatively spaced apart along the width direction of the mold cavity (4); and along the length direction of the mold cavity (4), the distance between the first inner side wall (43) and the second inner side wall (44) gradually decreases or gradually increases.

3. The slot wedge injection mold according to claim 2, characterized in that: The first inner side wall (43) comprises a first side wall portion (431) and a second side wall portion (432) connected to each other, the second inner side wall (44) comprises a third side wall portion (441) and a fourth side wall portion (442) connected to each other, the first side wall portion (431) and the third side wall portion (441) are symmetrically arranged with the central axis (46) of the mold cavity (4) as the axis of symmetry, and the second side wall portion (432) and the fourth side wall portion (442) are symmetrically arranged with the central axis (46) of the mold cavity (4) as the axis of symmetry; The first side wall portion (431) is inclined toward the interior of the mold cavity (4) from an end away from the second side wall portion (432) to an end connected to the second side wall portion (432), and the second side wall portion (432) is inclined toward the interior of the mold cavity (4) from an end connected to the first side wall portion (431) to an end away from the first side wall portion (431), and the inclination angle of the first side wall portion (431) is different from the inclination angle of the second side wall portion (432).

4. The slot wedge injection mold according to any one of claims 1 to 3, characterized in that: The mold cavity (4) comprises: a main body cavity (41); and A snap-fit ​​cavity (42), the snap-fit ​​cavity (42) being in communication with the main cavity (41), and the snap-fit ​​cavity (42) being used to accommodate a snap-fit ​​protrusion (2021) on the outer side wall of the magnetic conductive portion (202).

5. The slot wedge injection mold according to claim 4, characterized in that: The inner wall of the snap-fit ​​cavity (42) comprises a lap wall (421), the lap wall (421) is located in the cavity of the lower mold (2), and the lap wall (421) is used to support the snap-fit ​​protrusion (2021).

6. The slot wedge injection mold according to any one of claims 1 to 3, characterized in that: The inner top wall (45) of the mold cavity (4) comprises a first top wall (451) and a second top wall (452), wherein the height of the first top wall (451) is lower than the height of the second top wall (452), the first top wall (451) is in contact with the upper end surface of the magnetic conductive portion (202), and the second top wall (452) is in contact with the upper end surface of the non-magnetic conductive portion (201).

7. The slot wedge injection mold according to any one of claims 1 to 3, characterized in that: The slot wedge injection mold (10) further comprises: An injection molding pipeline (3), wherein the injection molding pipeline (3) is connected to the mold cavity (4).

8. The slot wedge injection mold according to claim 7, characterized in that: The cavity of the upper mold (1) and the cavity of the lower mold (2) are assembled together to form a plurality of mold cavities (4), the plurality of mold cavities (4) are arranged at intervals, and an injection channel (5) connected to the plurality of mold cavities (4) is provided inside the slot wedge injection mold (10), and the injection pipe (3) is connected to the plurality of mold cavities (4) through the injection channel (5).

9. The slot wedge injection mold according to any one of claims 1 to 3, characterized in that: The slot wedge injection mold (10) further comprises: A protrusion component (6), wherein the protrusion component (6) is arranged in the inner cavity of the upper mold (1), and the protrusion component (6) is configured to position the magnetic conductive part (202) placed in the cavity of the lower mold (2) at a preset position.

10. The slot wedge injection mold according to claim 9, characterized in that: The protrusion assembly (6) comprises two protrusions (61) arranged at intervals along the length direction of the mold cavity (4); the protrusions (61) are arranged in the inner cavity of the upper mold (1); when the upper mold (1) and the lower mold (2) are fastened and fixed, the two ends of the magnetic conductive part (202) in the length direction are respectively in contact with the two protrusions (61).

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