A connection structure, an insulating frame, a stator and a motor

Abstract

The present invention provides a connection structure, an insulating skeleton, a stator and a motor, and relates to the field of motors. The connection structure includes: a first connection end and a second connection end that can be connected by plugging; the first connection end has a first male head and a first female head, and the second connection end includes a second male head whose shape matches the first female head, and a second female head whose shape matches the first male head; the first male head and the second male head have the same shape; the first female head and the second female head have the same shape; the first male head and the second female head are plugged in and matched, and the first female head and the second male head are plugged in and matched. Due to the connection structure provided by the present invention, a male head and a female head are simultaneously arranged on the same connection end to realize the connection of the two connection ends. Therefore, when applied, the structure of the end of each slot insulating part is the same, so the connection structure provided by the present invention is also applicable to insulating skeletons with odd slot insulating parts.

Description

Technical Field

[0001] The present invention relates to the field of motors, and in particular to a connection structure, an insulating frame, a stator and a motor. Background Art

[0002] The motor stator is an important component of the motor, and the insulation frame is an important component in the motor stator. The form of the insulation frame is slightly different for different models of motors. For the stator of the concentrated winding variable frequency motor, the ends and slot insulation parts of the insulation frame are both injection molded. This insulation frame includes two ends and a number of slot insulation parts located between the two ends. In order to facilitate assembly, the slot insulation parts of the insulation frame will be cut along the cross section of the vertical axis to divide it into an upper frame and a lower frame, and a connection structure is set at the end of the cut slot insulation part for connecting the slot insulation parts during assembly.

[0003] The existing insulation skeletons are mostly connected to the slot insulation part through the male and female connector structure. For example, please refer to Figure 1 , a male connector is provided at the end of the slot insulating part of the upper frame, and a corresponding female connector is provided at the end of the slot insulating part of the lower frame, so that the upper frame and the lower frame can be connected by plugging. However, in the insulating frame of this structure, since the structures of the male connector and the female connector on the upper frame and the lower frame are different, the upper frame and the lower frame need to be molded separately during production, which increases the production cost.

[0004] Please refer to Figure 2 In some existing insulating frames, the problem of requiring secondary mold opening is solved by alternately setting male and female connectors. Specifically, in several slot insulating parts of the upper frame, male connectors and female connectors are alternately set at the ends of adjacent slot insulating parts, so that the structure of the lower frame can be completely the same as that of the upper frame, thus avoiding the problem of secondary mold opening. However, this method is only applicable to insulating frames with an even number of slot insulating parts, and is not applicable to insulating frames with an odd number of slot insulating parts. Summary of the invention

[0005] The present invention provides a connection structure, an insulating frame, a stator and a motor, aiming to improve the problem that an upper frame and a lower frame of an existing insulating frame need to be molded separately.

[0006] The present invention is achieved in that:

[0007] A connection structure is applied to an insulating frame, the insulating frame includes an upper frame and a lower frame, the connection structure is used to connect the corresponding slot insulating parts between the upper frame and the lower frame, and the connection structure includes: a first connection end and a second connection end capable of being connected to a plug;

[0008] The first connecting end has a first male head and a first female head, and the second connecting end includes a second male head whose shape matches that of the first female head, and a second female head whose shape matches that of the first male head;

[0009] Wherein, the first male head portion and the second male head portion have the same shape; the first female head portion and the second female head portion have the same shape;

[0010] The first male head portion is plug-matched with the second female head portion, and the first female head portion is plug-matched with the second male head portion.

[0011] Furthermore, in a preferred embodiment of the present invention, a gap is provided at a connection between the first male portion and the first female portion, and a gap is provided at a connection between the second male portion and the second female portion.

[0012] Furthermore, in a preferred embodiment of the present invention, the sum of the lengths of the projections of the first male portion and the first female portion on the first cross section is greater than or equal to the length of the projection of the slot insulating portion on the first cross section.

[0013] Further, in a preferred embodiment of the present invention, the sum of the lengths of the projections of the first male portion and the first female portion on the first cross section is greater than the length of the projection of the slot insulating portion on the first cross section.

[0014] Furthermore, in a preferred embodiment of the present invention, the sum of the thickness of the first male portion and the thickness of the first female portion is less than or equal to the thickness of the slot insulating portion.

[0015] Furthermore, in a preferred embodiment of the present invention, the sum of the thickness of the first male portion and the thickness of the first female portion is smaller than the thickness of the slot insulating portion.

[0016] Furthermore, in a preferred embodiment of the present invention, the first male portion includes a plurality of first sub-portions arranged at intervals, the first female portion includes a plurality of second sub-portions arranged at intervals, and the plurality of first sub-portions and the plurality of second sub-portions are alternately arranged in sequence.

[0017] An insulating skeleton comprises the connection structure described in any one of the above items.

[0018] A stator comprises the above-mentioned insulating frame.

[0019] A motor comprises the above-mentioned stator.

[0020] The beneficial effects of the present invention are as follows: the connection structure obtained by the above design of the present invention, the first connection end and the second connection end are both composed of a male head and a female head at the same time, when the first connection end and the second connection end are matched and plugged, the first male head and the second female head are matched and plugged, and the first female head and the second male head are matched and plugged, so as to realize the plugging of the first connection end and the second connection end. And because the shapes of the first male head and the second male head are the same, and the shapes of the first female head and the second female head are the same, the shapes of the first connection end and the second connection end are exactly the same. That is to say, even if the first connection end and the second connection end are respectively arranged on the upper frame and the lower frame, because the shapes of the first connection end and the second connection end are exactly the same, the structures of the upper frame and the lower frame can also be exactly the same, avoiding the problem of secondary mold opening. At the same time, because the connection structure provided by the present invention is to simultaneously arrange the male head and the female head on the same connection end to realize the connection of the two connection ends. Therefore, when applied, the structure of the end of each slot insulation part is the same, and there is no need to alternately set it to different structures. In this way, the connection structure provided by the present invention is also applicable to the insulation frame with an odd number of slot insulation parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of an existing insulating skeleton;

[0023] Figure 2 It is a partial structural schematic diagram of another existing insulating skeleton;

[0024] Figure 3 is a structural schematic diagram of a connection structure provided by an embodiment of the present invention;

[0025] Figure 4 is a structural schematic diagram of a first connection end in a connection structure provided by an embodiment of the present invention;

[0026] Figure 5 is a top view of a first connection end in a connection structure provided by an embodiment of the present invention;

[0027] Figure 6 is a structural schematic diagram of a first connection end in a connection structure in another embodiment of the present invention;

[0028] Figure 7 It is a top view of a first connection end in a connection structure in another embodiment of the present invention.

[0029] Icon: first connection end 1; first male portion 11; first sub-portion 111; first female portion 12; second sub-portion 121; gap 13; second connection end 2; second male portion 21; second female portion 22. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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.

[0034] In the present invention, 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.

[0035] Example 1, please refer to Figure 3-Figure 5 As shown, this embodiment provides a connection structure, which is applied to an insulating frame. The insulating frame includes an upper frame and a lower frame. A plurality of slot insulating parts are provided on the upper frame and the lower frame, and the slot insulating parts between the upper frame and the lower frame correspond one to one. The connection structure provided in this embodiment is arranged on the opposite ends between the corresponding slot insulating parts.

[0036] The connection structure includes: a first connection end 1 and a second connection end 2 capable of being connected to each other. The first connection end 1 is arranged at the end of each insulating slot portion of the upper frame, and the second connection end 2 is arranged at the end of each insulating slot portion of the lower frame; or the first connection end 1 is arranged at the end of each insulating slot portion of the lower frame, and the second connection end 2 is arranged at the end of each insulating slot portion of the upper frame.

[0037] The first connection end 1 has a first male head 11 and a first female head 12, and the second connection end 2 includes a second male head 21 whose shape matches the first female head 12, and a second female head 22 whose shape matches the first male head 11; that is, the first male head 11 can be plugged and connected to the second female head 22, and the first female head 12 can be plugged and connected to the first male head 11.

[0038] The first male portion 11 and the second male portion 21 have the same shape; the first female portion 12 and the second female portion 22 have the same shape.

[0039] When the first connection end 1 and the second connection end 2 are plugged together, the first male portion 11 and the second female portion 22 are plugged together, and the first female portion 12 and the second male portion 21 are plugged together.

[0040] In the connection structure provided in this embodiment, the first connection end 1 and the second connection end 2 are both composed of a male head and a female head. When the first connection end 1 and the second connection end 2 are matched and plugged, the first male head 11 and the second female head 22 are matched and plugged, and the first female head 12 and the second male head 21 are matched and plugged, so as to realize the plugging of the first connection end 1 and the second connection end 2. And because the shapes of the first male head 11 and the second male head 21 are the same, and the shapes of the first female head 12 and the second female head 22 are the same, the shapes of the first connection end 1 and the second connection end 2 are exactly the same. In other words, even if the first connection end 1 and the second connection end 2 are respectively arranged on the upper frame and the lower frame, because the shapes of the first connection end 1 and the second connection end 2 are exactly the same, the structures of the upper frame and the lower frame can also be exactly the same, avoiding the problem of secondary mold opening. Specifically, when the first connection end 1 and the second connection end 2 face the same direction, the two structures are exactly the same. At the same time, when the first connection end 1 and the second connection end 2 are opposite, the first male head 11 and the second female head 22 are opposite, and the first female head 12 and the second male head 21 are opposite.

[0041] At the same time, since the connection structure provided by this embodiment is to set the male head and the female head at the same connection end to achieve the connection of the two connection ends, the structure of the end of each slot insulation part is the same when applied, and there is no need to alternately set different structures. In this way, the connection structure provided by this embodiment is also applicable to the insulation skeleton with an odd number of slot insulation parts.

[0042] In this embodiment, the first connection end 1 and the second connection end 2 have exactly the same shape, and the subsequent description will be described by taking the first connection end 1 as an example, and the second connection end 2 can be implemented directly with reference to the structure of the first connection end 1 .

[0043] Please refer to Figure 1-Figure 5 As shown, the specific shapes of the first male head 11 and the first female head 12 can refer to the existing male and female head structure for connecting the slot insulating part. Specifically, the first female head 12 is a side wall extending along the outer edge of the end of the slot insulating part, and the first male head 11 is a side wall extending along the inner edge of the end of the slot insulating part. When plugged in, the outer side wall of the first male head 11 contacts the inner side wall of the first female head 12.

[0044] Since the first connecting end 1 is provided with the first male head 11 and the first female head 12, and the second connecting end 2 is provided with the second male head 21 and the second female head 22, in order to avoid interference when the first connecting end 1 and the second connecting end 2 are plugged into each other, a gap 13 needs to be provided at the connection between the male head and the female head, that is, the connection between the first male head 11 and the first female head 12 has the gap 13, and the connection between the second male head 21 and the second female head 22 has the gap 13.

[0045] In the motor stator, the slot insulation part of the insulating skeleton needs to ensure that the end surface of the tooth part of the stator core is completely covered. However, a gap 13 is set between the male head and the female head, which may cause the tooth part to be exposed when the first connection end 1 and the second connection end 2 are connected due to the excessive gap 13. This will cause leakage of the stator when the motor is running, causing safety hazards. In order to solve this problem, in this embodiment, the sum of the lengths of the projections of the first male head 11 and the first female head 12 on the first section is greater than or equal to the length of the projection of the slot insulation part on the first section.

[0046] Please refer to Figure 5 , when the sum of the length of the first male portion 11 and the length of the first female portion 12 is equal to the length of the slot insulating portion, it can ensure that the end face of the tooth portion is completely covered. At this time, the gap 13 is located in the radial direction of the slot insulating portion, so as to avoid interference when the first connection end 1 and the second connection end 2 are plugged in, and it is also ensured that the end face of the tooth portion can be completely covered. Due to certain errors that are inevitable in actual production, if the first male portion 11 and the first female portion 12 are too small in actual production, the motor will have the hidden danger of leakage. Therefore, in order to improve the fault tolerance rate, in this embodiment, the sum of the length of the first male portion 11 and the length of the first female portion 12 is greater than the length of the slot insulating portion. When implemented in this way, the first male portion 11 and the first female portion 12 have a certain overlap in the circumferential direction of the slot insulating portion, and at this time, the gap 13 is located between the radially overlapping positions. It should be noted that in the above description, all lengths refer to the lengths of the projections on the first section.

[0047] For further information, please refer to Figure 3-Figure 5As shown, in this embodiment, the sum of the thickness of the first male portion 11 and the thickness of the first female portion 12 is less than or equal to the thickness of the slot insulating portion. Since the structures of the first connection end 1 and the second connection end 2 are exactly the same, that is, when set in this way, after the first connection end 1 and the second connection end 2 are plugged in, the overall thickness of the connection structure is less than or equal to the thickness of the slot insulating portion. Specifically, after plugging in, the sum of the thickness of the first male portion 11 and the second female portion 22, as well as the sum of the thickness of the first female portion 12 and the second male portion 21, are both less than the thickness of the corresponding position of the slot insulating portion. Further, since a gap 13 is required at the connection between the male and female portions of the same connection end, and the gap 13 is in the radial direction, in actual application, in order to facilitate the setting of the gap 13, the sum of the thickness of the first male portion 11 and the thickness of the first female portion 12 is less than the thickness of the slot insulating portion, so as to facilitate the setting of the gap 13.

[0048] Further, in this embodiment, the first male portion 11 and the first female portion 12 can be implemented in an integral or split manner. When the integral type is adopted, the first male portion 11 and the first female portion 12 are two integral parts, please refer to Figure 5 Specifically, the left side is an integral first male portion 11, and the right side is an integral first female portion 12. Such an arrangement can reduce the processing difficulty and reduce the production cost.

[0049] In other embodiments, the first male portion 11 and the first female portion 12 may also be designed in a split type. Specifically, the first male portion 11 includes a plurality of first sub-portions 111 arranged at intervals, and the first female portion 12 includes a plurality of second sub-portions 121 arranged at intervals. The plurality of first sub-portions 111 and the plurality of second sub-portions 121 are arranged alternately in sequence. Figure 6 and Figure 7 Specifically, the first male portion 11 is composed of three spaced first sub-portions 111, and the first female portion 12 is composed of three spaced second sub-portions 121. At the same time, the first sub-portions 111 and the second sub-portions 121 are arranged alternately. This arrangement increases the number of male and female connectors that can be matched in the same group of connection ends, making the connection between the first connection end 1 and the second connection end 2 more stable.

[0050] This embodiment also provides an insulating frame, which includes any of the connection structures described above.

[0051] This embodiment also provides a stator, which includes the above-mentioned insulating frame.

[0052] This embodiment also provides a motor, which includes the above-mentioned stator.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A connection structure, applied to an insulating frame, the insulating frame comprising an upper frame and a lower frame, the connection structure is used to connect the corresponding slot insulating parts between the upper frame and the lower frame, characterized in that: The connection structure comprises: a first connection end and a second connection end capable of being connected to each other; The first connection end has a first male head and a first female head, and the second connection end includes a second male head whose shape matches that of the first female head, and a second female head whose shape matches that of the first male head; wherein the first male head and the second male head have the same shape; the first female head and the second female head have the same shape; the first male head and the second female head are plug-fitted together, the first female head and the second male head are plug-fitted together, and the first male head includes a plurality of first sub-heads arranged at intervals; there is a gap at the connection between the first male head and the first female head, and there is a gap at the connection between the second male head and the second female head; the sum of the lengths of the projections of the first male head and the first female head on the first section is greater than or equal to the length of the projection of the slot insulating portion on the first section.

2. The connection structure according to claim 1, characterized in that: The sum of the thickness of the first male portion and the thickness of the first female portion is less than or equal to the thickness of the slot insulating portion.

3. The connection structure according to claim 1, characterized in that: The first female portion includes a plurality of second sub-portions arranged at intervals, and the plurality of the first sub-portions and the plurality of the second sub-portions are arranged alternately in sequence.

4. An insulating skeleton, characterized in that: The insulating skeleton comprises the connection structure according to any one of claims 1 to 3.

5. A stator, characterized in that: The stator comprises the insulating frame according to claim 4.

6. A motor, characterized in that: The electric motor comprises the stator according to claim 5.

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