Motor insulation junction box and motor

Abstract

The invention provides a motor insulation junction box and a motor. The junction box comprises a supporting part and a wiring end part. The supporting part comprises a first platform, a supporting pin arranged on one end face of the first platform and a first buckle arranged on the side face of the first platform. The wiring end part comprises a second platform, a plurality of binding post fixing rings arranged on one end face of the second platform and a first buckle insertion piece arranged on the side face of the second platform. The second platform is installed on the end face, away from the supporting pin, of the first platform, and the first buckle and the first buckle inserting piece are buckled. When the motor insulation junction box is used for a motor, the supporting pin of the supporting part is inserted into the open slot of the stator iron core to achieve fixed installation of the motor and the stator iron core, the installation reliability of the junction box is improved, the junction box cannot fall off in a compressor, and the compressor failure phenomenon caused by poor contact of the motor junction box can be completely eradicated; and meanwhile, the success rate of production operation is improved.

Description

Technical Field

[0001] The invention relates to the field of compressors, and in particular to a motor insulating junction box and a motor. Background Art

[0002] As the market share of new energy vehicles increases, new energy vehicle companies are increasingly demanding the reliability of electric compressors. As the core energy conversion device in electric compressors, motors carry high voltages and large currents. The motors are connected to external power supplies through motor insulation junction boxes, so the reliability of the motors themselves is particularly important.

[0003] Most of the existing motor insulation terminal boxes are installed in the air and are not fixed to the motor bracket, which poses a risk of falling off the sealed terminal. At the same time, the motor lead wires have too much freedom, which poses a risk of hitting the rear shell or stator. Even if some motor insulation terminal boxes are installed and fixed using transition brackets, there is still a risk of loosening in the vertical direction and not being installed properly.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] In view of the problems in the prior art, an object of the present invention is to provide an insulating junction box for a motor, which has a simple structure and improves the reliability of the junction box installation and the success rate of the production operation.

[0006] A first aspect of the present invention provides a motor insulating terminal box, comprising a support portion and a terminal end portion;

[0007] The support portion includes a first platform, a support pin disposed on one end surface of the first platform, and a first buckle disposed on a side surface of the first platform;

[0008] The terminal end comprises a second platform, a plurality of terminal post fixing rings arranged on one end surface of the second platform, and a first buckle insert arranged on a side surface of the second platform;

[0009] The second platform is installed on the end surface of the first platform away from the supporting pin, and the first buckle is buckled with the first buckle insert.

[0010] According to the first aspect of the present invention, the first platform is further provided with a plurality of through slots, and the winding wire ends of the motor pass through one of the through slots and the terminal fixing ring and are exposed at one end of the terminal fixing ring.

[0011] According to the first aspect of the present invention, a second snap-in insert is further provided on the side of the first platform, and the second snap-in insert is configured to snap-fit ​​with a second snap of the bracket body of the insulating bracket of the motor.

[0012] A second aspect of the present invention provides a motor, comprising a stator core, an insulating bracket and the motor insulating terminal box.

[0013] According to a second aspect of the present invention, the stator core comprises an annular edge, a plurality of teeth extending radially inward from the annular edge, and a plurality of open slots extending along the axis of the stator core at the outer periphery of the annular edge;

[0014] The insulating bracket is arranged at one end of the stator core, the insulating bracket comprises an annular bracket body, a plurality of winding teeth are arranged on the inner wall of the bracket body, and a second buckle is arranged at one end of the bracket body;

[0015] The motor insulating junction box is arranged at one end of the insulating bracket away from the stator core, and the supporting pin is inserted into one of the opening grooves on the outer side of the bracket body.

[0016] According to a second aspect of the present invention, the open slot is perpendicular to an end surface of the stator core.

[0017] According to the second aspect of the present invention, the length of the support pin is greater than the thickness of the bracket body in the axial direction of the stator core; or

[0018] The length of the support pin is L, satisfying 6mm≤L≤15mm.

[0019] According to a second aspect of the present invention, the projection of the open slot on the end surface of the stator core is an isosceles trapezoid, and the base of the isosceles trapezoid is arranged on a side close to the center of the stator core;

[0020] The length of the bottom side of the opening groove is D1, which satisfies: 4mm≤D1≤8mm;

[0021] The height of the opening groove is D2, which satisfies: 2mm≤D2≤5mm; and / or

[0022] The bottom angle of the opening groove is β, and the bottom angle is 50°≤β≤80°.

[0023] According to a second aspect of the present invention, a second buckle insert is further provided on the side of the first platform, and the second buckle is buckled with the second buckle insert.

[0024] According to a second aspect of the present invention, the height of the second buckle in the axial direction of the stator core is D3, which satisfies: 3mm≤D3≤6mm;

[0025] The thickness of the second buckle in the circumferential direction of the stator core is D4, which satisfies: 1mm≤D4≤5mm.

[0026] When the motor insulating junction box of the present invention is used in a motor, the two are fixedly installed by inserting a support pin of the support part into an open groove of the stator core, thereby improving the reliability of the junction box installation. The junction box will not fall off inside the compressor, and the compressor failure caused by poor contact of the motor junction box can be prevented; at the same time, the one-time success rate of production operations is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, purposes and advantages of the present invention will become more apparent. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same figure numbers in the figures represent the same or similar parts, and their repeated descriptions will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities.

[0028] Figure 1 It is a schematic structural diagram of a motor insulation junction box according to an embodiment of the present invention;

[0029] Figure 2 It is a structural schematic diagram of a support portion of a motor insulating junction box according to an embodiment of the present invention;

[0030] Figure 3 It is a structural schematic diagram of a wiring end portion of a motor insulating terminal box according to an embodiment of the present invention;

[0031] Figure 4 It is a schematic structural diagram of a stator core according to an embodiment of the present invention;

[0032] Figure 5 A schematic structural diagram of an insulating bracket according to an embodiment of the present invention;

[0033] Figure 6 A schematic diagram of a motor assembly according to an embodiment of the present invention;

[0034] Figure 7 is a schematic structural diagram of a motor according to an embodiment of the present invention; and

[0035] Figure 8FIG. 4 is a cross-sectional view of an open slot of a stator core according to an embodiment of the present invention. DETAILED DESCRIPTION

[0036] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the disclosure will be more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0037] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of this specification. Moreover, the specific features, structures, materials or characteristics represented may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples represented in this specification without contradiction.

[0038] Throughout the specification, when it is said that a device is "connected" to another device, this includes not only the situation of "direct connection" but also the situation of "indirect connection" by placing other elements therebetween. Terms indicating relative spaces such as "below" and "above" may be used to more easily explain the relationship of one device illustrated in the accompanying drawings relative to another device. Such terms refer not only to the meanings indicated in the accompanying drawings, but also to other meanings or operations of the device in use. For example, if the device in the accompanying drawings is turned over, a device that was described as being "below" other devices is described as being "above" other devices. Therefore, the exemplary term "below" includes both above and below. The device can be rotated 90° or other angles, and the terms representing relative spaces are interpreted accordingly.

[0039] Although the terms first, second, etc. are used to represent various elements in some examples, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, the first interface and the second interface, etc. are represented. Moreover, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising" and "including" indicate that there are the described features, steps, operations, elements, components, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or more other features, steps, operations, elements, components, projects, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way, will there be an exception to this definition.

[0040] Although not fully defined, all terms, including technical and scientific terms, used herein have the same meaning as those generally understood by those skilled in the art to which this specification belongs. Terms defined in commonly used dictionaries are additionally interpreted as having meanings consistent with the relevant technical literature and the current disclosure, and unless defined, shall not be overly interpreted as having an ideal or very formal meaning.

[0041] In response to the existing technical problems, the present invention provides an insulating terminal box for a motor and a motor, the terminal box comprising a support portion and a terminal end portion; the support portion comprises a first platform, a support pin disposed on an end face of the first platform, and a first buckle disposed on a side face of the first platform; the terminal end portion comprises a second platform, a plurality of terminal post fixing rings disposed on an end face of the second platform, and a first buckle insert disposed on a side face of the second platform; the second platform is mounted on an end face of the first platform away from the support pin, and the first buckle and the first buckle insert are buckled. When the insulating terminal box for a motor of the present invention is used in a motor, the support pin of the support portion is inserted into an open groove of the stator core to achieve fixed installation of the two, thereby improving the reliability of the terminal box installation, preventing the terminal box from falling off inside the compressor, and preventing compressor failure due to poor contact of the motor terminal box; at the same time, improving the success rate of production operations.

[0042] The structure of the motor insulation junction box and the motor of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It can be understood that the various specific embodiments are not intended to limit the protection scope of the present invention.

[0043] Figure 1Schematic diagram of the structure of a motor insulation terminal box according to an embodiment of the present invention. Specifically, the motor insulation terminal box 3 includes a support portion and a terminal end portion. Figure 2 and Figure 3 The schematic diagrams are respectively the structural diagrams of the support part and the terminal end of the motor insulation terminal box according to an embodiment of the present invention, wherein the support part includes a first platform 31, a support pin 311 arranged on one end face of the first platform 31, and a first buckle 312 arranged on the side of the first platform 31; the terminal end includes a second platform 32, a plurality of terminal post fixing rings 321 arranged on one end face of the second platform 32, and a first buckle insert 322 arranged on the side of the second platform 32. The second platform 32 is installed on the end face of the first platform 31 away from the support pin 311. At this time, the plurality of terminal post fixing rings 321 are buckled on the side away from the support pin 311 through the first buckle 312 and the first buckle insert 322, and the second platform 32 is connected to the first platform 31.

[0044] The terminal fixing ring 321 is used to fix and expose the winding wire head of the motor. The number of the terminal fixing rings 321 matches the number of the winding wire heads of the motor. Further, the first platform 31 is also provided with a plurality of through slots 313. One winding wire head of the motor passes through a through slot 313 and a terminal fixing ring 321 and is exposed at one end of the terminal fixing ring 321. Accordingly, the number of the through slots 313 is equivalent to the number of the terminal fixing rings 321. Figure 2 As shown, the first platform 31 is provided with three parallel strip-shaped through grooves 313. When the second platform 32 is connected to the first platform 31, each terminal fixing ring 321 is located above a through groove 313, which is convenient for threading the winding wire end and prevents the compressor failure caused by poor contact of the motor insulation terminal box.

[0045] At the same time, if Figure 2 As shown, a second snap-in insert 314 may also be provided on the side of the first platform 31 , and the second snap-in insert 314 is used to snap-fit ​​with the second snap of the bracket body of the insulating bracket of the motor. This structure will be further described below.

[0046] The present invention further provides a motor, comprising a stator core 1, an insulating bracket 2 and the motor insulating junction box 3 described above.

[0047] Figure 4 Schematic diagram of the structure of a stator core of an embodiment of the present invention, the stator core 1 comprises an annular edge 11, a plurality of teeth 12 extending radially inward from the annular edge 11, and a plurality of open slots 13 extending along the axis of the stator core 1 from the outer periphery of the annular edge 11. The plurality of teeth 12 and the plurality of open slots 13 can be evenly distributed in the circumferential direction of the annular edge 11. The number of teeth 12 and the number of open slots 13 are set according to the structure and target performance of the motor.

[0048] Figure 5 The insulating bracket 2 is a schematic structural diagram of an embodiment of the present invention. The insulating bracket 2 includes an annular bracket body 21, a plurality of winding teeth 22 are arranged on the inner wall of the bracket body 21, and a second buckle 23 is arranged at one end of the bracket body 21. Winding grooves are formed between the plurality of winding teeth 22, and the stator winding of the motor is wound on the winding teeth. The number of winding teeth 22 is equivalent to the number of teeth 12 of the stator core 1, and the plurality of winding teeth 22 are evenly distributed in the circumferential direction of the bracket body 21.

[0049] The insulating bracket 2 is arranged at one end of the stator core 1, the motor insulating terminal box 3 is arranged at the end of the insulating bracket 2 away from the stator core 1, and the supporting pin 311 of the motor insulating terminal box 3 is inserted into an open slot 13 of the stator core 1 outside the bracket body 21.

[0050] When assembling the motor, the stator core 1 and the insulating bracket 2 are first assembled and wound, and then fixed and installed through the support pin 311 of the motor insulating terminal box 3 and an open slot 13 of the stator core 1. Figure 6 and Figure 7 are schematic diagrams of a motor during and after assembly according to an embodiment of the present invention, respectively, Figure 6 and Figure 7 The motor winding is not shown in the figure. Preferably, the opening slot 13 is perpendicular to the end face of the stator core, and correspondingly, the support pin 311 is perpendicular to the first platform 31. The cooperation between the support pin 311 and the opening slot 13 prevents the motor insulation terminal box 3 from circumferentially moving relative to the stator core 1, greatly improving the strength of the connection between the two. The structure of the motor insulation terminal box 3 and the stator core 1 of the present invention solves the problem that the terminal box of the existing motor cannot be firmly fixed, improves the phenomenon that the terminal post cannot be installed due to the position offset of the terminal box during production and assembly, and provides convenience for the assembly of the compressor.

[0051] In order to improve the stability of the combination of the support pin 311 and the opening slot 13, preferably, the length of the support pin 311 is greater than the thickness t of the bracket body 21 in the axial direction of the stator core. In practice, the length of the support pin 311 is L, satisfying 6mm≤L≤15mm.

[0052] The projection of the open slot 13 on the end surface of the stator core may be a quadrilateral, such as a rectangle or a trapezoid. In the above embodiment, the projection of the open slot 13 on the end surface of the stator core is an isosceles trapezoid, and the base of the isosceles trapezoid is arranged on a side close to the center of the stator core. Figure 8 A cross-sectional view of an open slot of a stator core according to an embodiment of the present invention. The length of the bottom side of the open slot 13 is D1, which satisfies 4mm≤D1≤8mm; the height of the open slot 13 is D2, which satisfies 2mm≤D2≤5mm; and / or the bottom angle of the open slot 13 is β, which satisfies 50°≤β≤80°.

[0053] Correspondingly, the cross-sectional shape of the support pin 311 is adapted to the cross-sectional shape of the slot, the thickness of the support pin 311 (corresponding to the height of the opening slot 13) can be between 1 mm and 5 mm, and the bottom edge of the isosceles trapezoidal cross-section of the support pin 311 can be between 3 mm and 8 mm.

[0054] In some embodiments, a second snap-in insert 314 is also provided on the side of the first platform 31. In this embodiment, the stator core 1 and the insulating bracket 2 are first installed together and then wound, and then fixedly installed through the support pin 311 of the motor insulating terminal box 3 and an open slot 13 of the stator core 1. The installation method is that the support pin 311 of the motor insulating terminal box 3 is aligned and inserted into an open slot 13 along the axial direction, and the second snap-in insert 314 on the side of the first platform 31 is fastened to complete the motor assembly, and the stator core, the insulating bracket and the terminal box will become a fixedly installed whole. The second snap-in insert 23 on one end of the bracket body 21 cooperates to realize the positioning and fixed connection of the motor insulating terminal box 3 and the insulating bracket 2, preventing the motor insulating terminal box 3 from moving horizontally and vertically relative to the insulating bracket 2, thereby improving the reliability of the installation of the motor insulating terminal box.

[0055] In some embodiments, the height of the second buckle 23 in the axial direction of the stator core is D3, satisfying 3mm≤D3≤6mm; its thickness in the circumferential direction of the stator core is D4, satisfying 1mm≤D4≤5mm. The protrusion height of the second buckle 23 is between 0.5mm and 2mm, and the angle between the protrusion and the side wall of the second buckle 23 is between 10° and 35°. The width of the first buckle insert 322 protruding from the side of the second platform 32 is D6, satisfying 1mm≤D6≤4mm, the height of the first buckle insert 322 in the axial direction is D7, satisfying 3mm≤D7≤6mm, and. The first buckle insert 322 adapts to a ring body, and the radial dimension of the ring body is between 2mm and 5mm. Other dimensions such as the second buckle insert can be set according to the specific structure of the second buckle, which will not be repeated here.

[0056] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is limited by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present application. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A motor insulation junction box, characterized in that: including a support portion and a wiring end portion; The support portion includes a first platform, a support pin disposed on one end surface of the first platform, and a first buckle disposed on a side surface of the first platform; The terminal end comprises a second platform, a plurality of terminal post fixing rings arranged on one end surface of the second platform, and a first buckle insert arranged on a side surface of the second platform; The second platform is installed on the end surface of the first platform away from the supporting pin, and the first buckle is buckled with the first buckle insert.

2. The motor insulating terminal box according to claim 1, characterized in that: The first platform is also provided with a plurality of through slots, and the winding wire head of the motor passes through one of the through slots and the terminal fixing ring and is exposed at one end of the terminal fixing ring.

3. The motor insulating junction box according to claim 1, characterized in that: A second snap-in insert is also provided on the side of the first platform, and the second snap-in insert is configured to snap-fit ​​with a second snap of the bracket body of the insulating bracket of the motor.

4. A motor, characterized in that: It comprises a stator core, an insulating bracket and the motor insulating junction box according to claim 1 or 2.

5. The motor according to claim 4, characterized in that The stator core comprises an annular edge, a plurality of teeth extending radially inward from the annular edge, and a plurality of open slots extending along the axis of the stator core at the outer periphery of the annular edge; The insulating bracket is arranged at one end of the stator core, the insulating bracket comprises an annular bracket body, a plurality of winding teeth are arranged on the inner wall of the bracket body, and a second buckle is arranged at one end of the bracket body; The motor insulating junction box is arranged at one end of the insulating bracket away from the stator core, and the supporting pin is inserted into one of the opening grooves on the outer side of the bracket body.

6. The motor according to claim 5, characterized in that The open slot is perpendicular to the end surface of the stator core.

7. The motor according to claim 6, characterized in that The length of the support pin is greater than the thickness of the bracket body in the axial direction of the stator core; or The length of the support pin is L, satisfying 6mm≤L≤15mm.

8. The motor according to claim 5, characterized in that The projection of the open slot on the end surface of the stator core is an isosceles trapezoid, and the base of the isosceles trapezoid is arranged on a side close to the center of the stator core; The length of the bottom side of the opening groove is D1, which satisfies: 4mm≤D1≤8mm; The height of the opening groove is D2, which satisfies: 2mm≤D2≤5mm; and / or The bottom angle of the opening groove is β, and the bottom angle is 50°≤β≤80°.

9. The motor according to claim 5, characterized in that A second buckle insert is also provided on the side of the first platform, and the second buckle is buckled with the second buckle insert.

10. The motor according to claim 5, characterized in that The height of the second buckle in the axial direction of the stator core is D3, which satisfies: 3mm≤D3≤6mm; The thickness of the second buckle in the circumferential direction of the stator core is D4, which satisfies: 1mm≤D4≤5mm.

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