Busbar structure and motor

Abstract

The utility model discloses a busbar structure and a motor. The busbar structure comprises a busbar, at least one winding and at least one fastener. The busbar comprises a main body part and at least one protruding part, and the protruding part is connected with the main body part and protrudes out of the main body part in the first direction. At least one winding and the corresponding protruding part are arranged in parallel, and one end of the winding away from the main body part is conductively connected with one end of the protruding part away from the main body part. The fasteners and the ends, away from the main body part, of the windings are arranged at intervals, and the fasteners are connected with the protruding parts and the corresponding windings so as to limit relative displacement of the protruding parts and the corresponding windings. According to the busbar structure, the fastener is arranged, so that the modality of the busbar structure is improved, the stability of the connection between the winding and the busbar is ensured, and the stability and the safety of the motor are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of machinery and automobiles, in particular to a busbar structure and a motor. Background Art

[0002] In the continuous evolution of vehicle technology, especially in the pursuit of extreme space utilization and high-efficiency output, flat wire motor technology is gradually becoming the focus of the industry with its excellent slot fill rate and power density characteristics. In order to meet the strict performance requirements of this type of motor, the design of the stator structure is particularly important. Its core function is to efficiently convert electrical energy into magnetic energy to drive the motor. To achieve this goal, the stator needs to be connected to a precisely controlled three-phase current system. In order to further optimize the efficiency of power transmission and reduce heat loss, the strategy of increasing the number of parallel branches of coils in each phase winding is usually adopted. Although this can effectively reduce the AC resistance, it also brings challenges to current distribution and management. In this context, the busbar is a key component that connects the parallel branches and ensures uniform current distribution. Its design and application are crucial. The traditional busbar system usually consists of two parts: a neutral copper bar and a three-way connecting busbar. They are flexibly configured in parallel forms such as two or four according to the needs of the winding parallel branches.

[0003] In the related technology, abnormal motor winding data was monitored during the transmission whole machine vibration test. After disassembling the machine, cracks were found in the soldering points where the motor bus copper bar and the winding were welded. After analysis, it was found that the overall modal state of the motor bus was relatively low and resonated with the test excitation. The soldering points where the bus copper bar and the winding were welded were stretched open due to stress concentration, resulting in fracture problems at the soldering points.

[0004] Specifically, refer to Figure 1 , the neutral copper bar of the bus and the three-phase connection bus, as well as the welding points between them and the stator winding, are often set independently. In addition, in order to more conveniently realize the electrical connection between the winding and the bus, the bus usually has a raised part, which is used for welding with the winding. This design leads to scattered distribution of welding points and insufficient rigidity of the overall structure. When the vehicle is running for a long time and experiencing complex working conditions and vibration environment, the raised part is easily affected by vibration and moves greatly. However, the welding point is just set on the raised part of the bus. This situation causes each welding point to bear relatively concentrated and large stress. As a result, the welding point is very likely to fail due to fatigue accumulation and desoldering occurs, which not only affects the performance stability of the motor, but also increases the maintenance cost, posing a potential threat to the reliability and safety of the entire vehicle. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a busbar structure, which improves the mode of the busbar structure by arranging fasteners, thereby ensuring the stability of the connection between the winding and the busbar.

[0006] The utility model also provides a motor comprising the busbar structure.

[0007] According to the busbar structure in the first embodiment of the utility model, it includes:

[0008] A bus bar, comprising a main body and at least one protruding portion, wherein the protruding portion is connected to the main body and protrudes from the main body along a first direction;

[0009] At least one winding is arranged in parallel with the corresponding protrusion, and one end of the winding away from the main body is conductively connected to one end of the protrusion away from the main body;

[0010] At least one fastener is spaced apart from one end of the winding away from the main body, and the fastener is respectively connected to the protruding portion and the corresponding winding to limit the relative displacement of the protruding portion and the corresponding winding.

[0011] The busbar structure according to the embodiment of the utility model has at least the following beneficial effects:

[0012] The busbar of this embodiment includes a main body and a protruding part, the protruding part is connected to the main body, and the protruding part is connected to the main body, and the winding is connected to the protruding part. When the busbar structure vibrates, if there is no fastener of the utility model, the vibration directly acts on the connection between the winding and the protruding part, causing the junction of the winding and the protruding part to bear greater stress, making the winding easily disconnected from the protruding part.

[0013] The utility model sets fasteners, which are respectively connected to the protrusions and the corresponding windings to limit the relative displacement of the protrusions and the corresponding windings. In this way, the fasteners are equivalent to forming a relatively fixed support structure. This support structure can limit the relative movement of the windings and the busbars during the vibration process, especially reduce the vibration near the connection between the windings and the protrusions. High-frequency vibration near the connection between the windings and the protrusions is one of the main reasons for fatigue fracture of the solder joints. By reducing such vibrations, the stability of the connection between the windings and the protrusions can be effectively improved. On the one hand, the fasteners can disperse the stress generated during vibration from the connection between the windings and the protrusions. The fasteners can not only absorb part of the vibration energy, but also disperse the stress to a wider area, thereby reducing the stress burden at the connection between the windings and the protrusions, making the connection between the windings and the protrusions more stable. On the other hand, since the fastener can limit the relative displacement of the winding and the protrusion, the fastener is spaced apart from the end of the winding away from the main body, and the end of the winding away from the main body and the end of the protrusion away from the main body are used for conductive connection. Therefore, this arrangement shortens the distance between the main body and the conductive connection between the winding and the protrusion. It can be understood that the fastener, the winding and the corresponding protrusion form a rigid whole, so that the mode of the bus structure is improved, the vibration excitation frequency can be avoided, and the welding position is constrained to open, thereby ensuring the stability of the connection between the winding and the bus.

[0014] In other embodiments of the present invention, the fastener has a first limiting hole, and the protruding portion and the corresponding winding are both inserted into the first limiting hole.

[0015] In other embodiments of the present invention, one end of the winding away from the main body is welded to one end of the protrusion away from the main body, and along the first direction, the welding point of the winding welding the protrusion is exposed to the first limiting hole.

[0016] In other embodiments of the present invention, there is a gap between the protrusion and the hole wall of the first limiting hole, and / or between the winding and the hole wall of the first limiting hole, and the gap is filled with an adhesive.

[0017] In other embodiments of the present invention, the fastener further wraps at least a portion of the main body.

[0018] In other embodiments of the present invention, the protrusion and the corresponding winding are in close contact.

[0019] In other embodiments of the present invention, the fastener includes a first injection-molded block, and the first injection-molded block is fixedly connected to the main body and the corresponding protrusions respectively.

[0020] In other embodiments of the present invention, the fastener includes an elastic layer, the elastic layer is attached to a surface of the fastener perpendicular to the first direction, the elastic layer has a second limiting hole, the axis of the second limiting hole is collinear with the axis of the first limiting hole, and the aperture of the second limiting hole is smaller than the aperture of the first limiting hole;

[0021] Wherein, the protrusion and the winding are both penetrated through the second limiting hole.

[0022] In other embodiments of the present invention, the busbar structure further includes a second injection molded block, the busbar further includes a first-phase copper bar, a second-phase copper bar and a third-phase copper bar, the second injection molded block is connected to a fastener, the second injection molded block and the fastener are relatively distributed on both sides of the busbar structure, the second injection molded block also wraps at least a portion of the first-phase copper bar, and / or the second injection molded block also wraps at least a portion of the second-phase copper bar, and / or the second injection molded block also wraps at least a portion of the third-phase copper bar; and / or,

[0023] The fasteners are provided at two ends of the busbar perpendicular to the first direction.

[0024] The motor according to the second embodiment of the utility model comprises the busbar structure of any one of the above embodiments.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0027] Figure 1 It is a schematic diagram of the structure of a motor in the prior art, wherein the busbar structure has no fasteners;

[0028] Figure 2 It is a schematic diagram of the structure of a motor in one embodiment of the utility model, wherein the busbar structure is provided with fasteners;

[0029] Figure 3 This is a schematic structural diagram of a busbar structure in one embodiment of the utility model;

[0030] Figure 4 It is an enlarged structural schematic diagram of the position of the fastener in 3;

[0031] Figure 5 Schematic diagram of the cross-sectional structure of the 4 fastener-related structures;

[0032] Figure 6 This is a schematic diagram of the structure of a fastener in an embodiment of the utility model, and the fastener is not provided with an elastic layer;

[0033] Figure 7It is a structural schematic diagram of a fastener in another embodiment of the utility model, and the fastener is provided with an elastic layer;

[0034] Figure 8 The figure is a comparison chart of the stress results of the solder joints obtained after simulating the solution of the utility model compared with those of the prior art.

[0035] Reference numerals:

[0036] The busbar 100, the main body 110, the protruding portion 120, the neutral copper bar 130, the first phase copper bar 140, the second phase copper bar 150, and the third phase copper bar 160;

[0037] Winding 200;

[0038] Fastener 300, first injection block 310, first limiting hole 311, elastic layer 320, second limiting hole 321;

[0039] Soldering points 400;

[0040] A second injection molding block 500;

[0041] The first direction X. DETAILED DESCRIPTION

[0042] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0045] In the description of the present utility model, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model based on the specific content of the technical solution.

[0046] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] As mentioned above, in the related art, reference Figure 1 , the neutral copper bar of the bus and the three-phase connection bus, as well as the welding points between them and the stator winding, are often set independently. In addition, in order to more conveniently realize the electrical connection between the winding and the bus, the bus usually has a raised part, which is used for welding with the winding. This design leads to scattered distribution of welding points and insufficient rigidity of the overall structure. When the vehicle is running for a long time and experiencing complex working conditions and vibration environment, the raised part is easily affected by vibration and moves greatly. However, the welding point is just set on the raised part of the bus. This situation causes each welding point to bear relatively concentrated and large stress. As a result, the welding point is very likely to fail due to fatigue accumulation and desoldering occurs, which not only affects the performance stability of the motor, but also increases the maintenance cost, posing a potential threat to the reliability and safety of the entire vehicle.

[0048] To solve the above problems, refer to Figures 2 to 8 The utility model provides a busbar structure and a motor. Figure 2 and Figure 3The busbar structure of the present invention includes a busbar 100, a winding 200 and a fastener 300. The busbar 100 includes a main body 110 and a protruding portion 120, the protruding portion 120 is connected to the main body 110, and protrudes from the main body 110 along the first direction X. It can be understood that in order to facilitate the electrical connection between the pins of the busbar 100 and the winding 200, that is, to increase the flexibility and adaptability of the pins so that it can better adapt to different connection requirements and space limitations, the pins of the busbar 100 are usually tilted, and the tilted structure of this part is configured as the protruding portion 120 of the present invention. The winding 200 is connected to the protruding portion 120, so that the winding 200 and the busbar 100 are electrically connected, so that the current can flow smoothly between the two. The fastener 300 has a first limiting hole 311, the protrusion 120 is passed through the first limiting hole 311, and the winding 200 is passed through the first limiting hole 311. The first limiting hole 311 is configured to limit the position of the protrusion 120 and the winding 200 so that the protrusion 120 and the winding 200 fit together.

[0049] When the busbar structure vibrates, if there is no fastener 300 of the utility model, the vibration directly acts on the connection between the winding 200 and the protrusion 120, causing the junction of the winding 200 and the protrusion 120 to bear greater stress, making the winding 200 easily disconnected from the protrusion 120. The utility model sets a fastener 300, and the fastener 300 is respectively connected to the protrusion 120 and the corresponding winding 200 to limit the relative displacement of the protrusion 120 and the corresponding winding 200. In this way, the fastener 300 is equivalent to forming a relatively fixed support structure. This support structure can limit the relative movement of the winding 200 and the busbar 100 during the vibration process, especially reduce the vibration near the connection between the winding 200 and the protrusion 120. High-frequency vibration near the connection between the winding 200 and the protrusion 120 is one of the main reasons for fatigue fracture of the solder joint 400. By reducing such vibration, the stability of the connection between the winding 200 and the protrusion 120 can be effectively improved. On the one hand, the fastener 300 can disperse the stress generated during vibration from the connection between the winding 200 and the protrusion 120. The fastener 300 can not only absorb part of the vibration energy, but also disperse the stress to a wider area, thereby reducing the stress burden at the connection between the winding 200 and the protrusion 120, making the connection between the winding 200 and the protrusion 120 more stable. On the other hand, since the fastener 300 can limit the relative displacement of the winding 200 and the protrusion 120, the fastener 300 is spaced apart from the end of the winding 200 away from the main body 110, and the end of the winding 200 away from the main body 110 and the end of the protrusion 120 away from the main body 110 are used for conductive connection. Therefore, such a configuration shortens the distance between the main body 110 and the conductive connection between the winding 200 and the protrusion 120. It can be understood that the fastener 300, the winding 200 and the corresponding protrusion 120 form a rigid whole, so that the mode of the bus structure is improved, the vibration excitation frequency can be avoided, and the welding position can be constrained to open, thereby ensuring the stability of the connection between the winding 200 and the bus 100.

[0050] It can be understood that the fastener 300 is provided in order to have a support structure near the junction of the winding 200 and the protrusion 120. Along the transmission direction of the vibration, the support structure presses the winding 200 and the protrusion 120 tightly. The vibration needs to pass through the support structure before it can be transmitted to the connection between the winding 200 and the protrusion 120. Since the winding 200 and the protrusion 120 are restricted to be firmly attached together at the support structure, it can be understood that the winding 200, the protrusion 120, and the fastener 300 form a relatively rigid whole. It can be understood that at this time, the source of the vibration that affects the connection between the winding 200 and the protrusion 120 lies in the location of the support structure. Therefore, after the vibration is transmitted to the connection between the winding 200 and the protrusion 120, the vibration amplitude generated by the winding 200 and the protrusion 120 is smaller, so the connection between the winding 200 and the protrusion 120 is more stable and firm.

[0051] So, refer to Figure 3 and Figure 7 The fastener 300 of the present invention includes but is not limited to fastening the protrusion 120 and the winding 200 in the form of the first limiting hole 311. As long as the structure plays a role in fastening the winding 200 and the protrusion 120 along the vibration transmission path, it belongs to the protection scope of the fastener 300 of the present invention. For example, the fastener 300 of the present invention can be configured as a clamp or a clamp. By arranging the clamp or the clamp on the vibration transmission path, the clamp or the clamp acts to make the winding 200 and the protrusion 120 fit closely together, so that the winding 200, the protrusion 120, the clamp or the clamp together form a rigid whole, so that the connection between the winding 200 and the protrusion 120 is more stable.

[0052] Of course, it is understandable that the purpose of setting the fastener 300 is to make the winding 200, the protrusion 120 and the fastener 300 form a rigid whole together, so the fastener 300 only needs to limit the relative position of the winding 200 and the protrusion 120. For example, as a preferred embodiment, the fastener 300 limits the winding 200 and the protrusion 120 to fit together; in some other embodiments, the fastener 300 limits the winding 200 and the protrusion 120 to maintain a relatively static position relationship, and the winding 200 and the protrusion 120 are spaced apart at the fastener 300.

[0053] Of course, it is understandable that in some embodiments, an adjustable fastening mechanism, such as a thread adjustment device or a spring locking device, is provided on the fastener 300, allowing the user to adjust the fastening force of the fastener 300 on the protrusion 120 and the winding 200 according to actual needs. This design can not only adapt to the changes in requirements under different working conditions, but also alleviate the situation of separation of the connection between the winding 200 and the protrusion 120 due to stress concentration to a certain extent.

[0054] It is understandable that in some other embodiments of the present invention, the fastener 300 may be configured to be made of a high thermal conductivity material, and / or a high thermal conductivity material may be further provided on the surface of the protrusion 120. By increasing the heat dissipation area and the thermal conductivity efficiency, the heat accumulation caused by the passage of current is effectively reduced, the adverse effect of local overheating on the connection between the winding 200 and the protrusion 120 is prevented, and the overall performance of the busbar structure can be further improved.

[0055] Based on the first embodiment, in some embodiments of the present invention, referring to Figure 4 and Figure 5 , the winding 200 is welded to the protrusion 120, and along the first direction X, the welding point 400 of the winding 200 welding the protrusion 120 is exposed to the first limiting hole 311. By directly welding the winding 200 to the protrusion 120 and exposing the welding point 400 along the first direction X, the welding process is simplified. Such a configuration avoids complex positioning and fixing processes, thereby improving production efficiency. The exposed welding point 400 also provides better visibility and is convenient for inspection and maintenance. And since the winding 200 generates a lot of heat during the operation of the motor, by directly exposing the welding point 400, the heat dissipation efficiency can be improved. Of course, it can be understood that in some embodiments, the fastener 300 includes a first injection molding block 310, and the first injection molding block 310 wraps the welding point 400 of the winding 200 and the protrusion to prevent the welding point 400 of the winding 200 and the protrusion 120 from being disconnected.

[0056] It is understood that in order to protect the solder joint 400 from oxidation and corrosion, in some embodiments, a layer of rust inhibitor or insulating paint is coated on the surface of the solder joint 400. Such a configuration can not only extend the service life of the solder joint 400, but also improve the reliability of the electrical connection.

[0057] It is understood that in some embodiments, a silver-containing welding material is selected to weld the winding 200 and the protrusion 120. The silver-containing material has a lower melting point and can quickly form a firm welding joint, further improving the welding quality and stability. In addition, the silver material has good electrical conductivity and can reduce the heat generated by the winding 200 during operation.

[0058] Based on the first embodiment, refer to Figure 3 and Figure 4In some embodiments of the present invention, the fastener 300 wraps at least a portion of the main body 110, the protrusion 120 and the corresponding winding 200. Specifically, the fastener 300 includes a first injection block 310, and the first injection block 310 is configured to be simultaneously injection-molded on the main body 110 and the protrusion 120. The first injection block 310 is configured as the fastener 300, and is tightly combined with the main body 110 and the protrusion 120 through the injection molding process to form a firm whole. Compared with the raised protrusion 120, the main body 110 is less affected by vibration. The first injection block 310 is arranged at the root of the protrusion 120, which further strengthens the connection between the protrusion 120 and the main body 110 and further reduces the vibration amplitude of the protrusion 120. The first injection block 310, the protrusion 120 and the winding 200 form a whole together, so the connection between the protrusion 120 and the winding 200 is less affected by vibration and the connection is more stable.

[0059] The first injection block 310 has a first limiting hole 311, referring to Figure 5 In some embodiments, the axis of the first limiting hole 311 is parallel to the first direction X. The axis of the first limiting hole 311 is parallel to the first direction X, and the protrusion 120 protrudes along the first direction X and is connected to the main body 110, and the winding 200 is connected to the protrusion 120. The design of the first limiting hole 311 being parallel to the first direction X makes the protrusion 120 and the winding 200 fit together along the first direction X, so that the restriction of the first injection block 310 on the injection molding of the protrusion 120 and the winding 200 is more stable.

[0060] Of course, it can be understood that, by using the first injection block 310, the relative position of the protrusion 120 and the winding 200 is limited by the injection molding process, which can adapt to various shapes of windings 200 and / or protrusions 120 and windings 200 and protrusions 120 with different positional relationships. Specifically, on the basis of the first embodiment, in some embodiments of the utility model, the first injection block 310 has a glue injection hole, which is configured for the injection of glue in the first injection block 310, and the glue injection hole is connected to the first limiting hole 311. There is a gap between the protrusion 120 and the hole wall of the first limiting hole 311, and / or between the winding 200 and the hole wall of the first limiting hole 311, and the busbar structure also includes an adhesive, and the adhesive is filled in the gap. When the winding 200 and / or the protrusion 120 are configured as a column, it is not easy to make the winding 200 and the protrusion 120 firmly fit together by simply applying pressure. At this time, through the injection molding process, the adhesive is filled in the area around the winding 200 and the protrusion 120, thereby gradually reducing the range in which the winding 200 and the protrusion 120 can move, and finally the winding 200 and the protrusion 120 are squeezed together to achieve a tight and stable fit between the winding 200 and the protrusion 120.

[0061] It is understandable that the first injection block 310 is usually made of an insulating material and can provide good electrical insulation performance. In some embodiments, the first injection block 310 can choose to use a high-performance insulating material, such as polyimide, polyester, etc. These materials not only have good insulation performance, but also have excellent high temperature resistance and chemical corrosion resistance. The first injection block 310 configured in this way can effectively conduct the heat generated by the winding 200 and the protrusion 120, and can prevent safety accidents such as short circuits or fires caused by electrical failures, thereby ensuring the safety of the busbar structure of the utility model.

[0062] Reference Figure 3 and Figure 4 In some embodiments, the first injection block 310 is provided with a plurality of first limiting holes 311, and the plurality of first limiting holes 311 are all suitable for passing the winding 200 and the protrusion 120. Such a configuration can further save space and improve the overall mode of the busbar 100.

[0063] Based on the first embodiment, refer to Figure 3 and Figure 4 In some embodiments of the utility model, the first injection block 310 extends along the first direction X so that the first limiting hole 311 extends along the first direction X. The first limiting hole 311 of the first injection block 310 is used to limit the relative position of the winding 200 and the protrusion 120. Along the direction of the axis of the first limiting hole 311, the first limiting hole 311 gradually tightens the winding 200 and the protrusion 120 so that the winding 200 and the protrusion 120 are attached together along the first direction X. The first limiting hole 311 extends along the first direction X. The first limiting hole 311 is used to limit the area where the winding 200 and the protrusion 120 are attached to a larger area, so that the winding 200 and the protrusion 120 are attached more firmly at the first limiting hole 311, thereby enhancing the stability of the connection between the winding 200 and the protrusion 120.

[0064] It can be understood that the first injection block 310 extends along the first direction X, so that the first limiting hole 311 extends along the first direction X. The first injection block 310 extends along the first direction X, which not only increases the area of ​​the hole wall of the first limiting hole 311 used to limit the winding 200 and the protrusion 120, thereby strengthening the restriction on the position of the winding 200 and the protrusion 120, but also reduces the cantilever distance of the protrusion 120, thereby enhancing the stability of the entire structure.

[0065] On the basis of the first embodiment, in some embodiments of the utility model, the busbar 100 includes a neutral copper bar 130, the first injection molding block 310 is injection molded on the neutral copper bar 130, and the busbar structure includes a second injection molding block 500, and the second injection molding block 500 is connected to the first injection molding block 310. Specifically, in some embodiments, the second injection molding block 500 and the first injection molding block 310 are independently provided, and the second injection molding block 500 is detachably connected to the first injection molding block 310; in some embodiments, the second injection molding block 500 and the first injection molding block 310 are integrally formed.

[0066] The busbar 100 further includes a first-phase copper bar 140, a second-phase copper bar 150, and a third-phase copper bar 160. The second injection molding block 500 wraps at least a portion of the first-phase copper bar 140, and / or the second injection molding block 500 wraps at least a portion of the second-phase copper bar 150, and / or the second injection molding block 500 wraps at least a portion of the third-phase copper bar 160. In some embodiments, the first-phase copper bar 140, the second-phase copper bar 150, and the third-phase copper bar 160 are all detachably connected to the second injection molding block 500, wherein the first-phase copper bar 140 is configured as a U-phase copper bar, the second-phase copper bar 150 is configured as a V-phase copper bar, and the third-phase copper bar 160 is configured as a W-phase copper bar. Figure 3 Specifically, the second injection molding block 500 is provided with slots that match the first phase copper bar 140, the second phase copper bar 150 and the third phase copper bar 160 respectively, and the first phase copper bar 140, the second phase copper bar 150 and the third phase copper bar 160 are detachably connected to the second injection molding block 500 by inserting into the slots. Such a configuration simplifies the installation process of the first phase copper bar 140, the second phase copper bar 150 and the third phase copper bar 160.

[0067] The first phase copper busbar 140, the second phase copper busbar 150 and the third phase copper busbar 160 are configured to be detachably connected to the second injection molding block 500. On the one hand, when a phase copper busbar fails, it can be quickly removed and replaced from the second injection molding block 500 without changing the entire busbar structure. This greatly improves the maintainability and operating efficiency of the equipment. On the other hand, the detachable first phase copper busbar 140, the second phase copper busbar 150 and the third phase copper busbar 160 enable the busbar structure to adapt to different electrical connection requirements. According to actual needs, different numbers or specifications of phase copper buses can be flexibly configured to meet diverse application scenarios.

[0068] Of course, it is understandable that the first phase copper bar 140, the second phase copper bar 150 and the third phase copper bar 160 can also be connected to the second injection molding block 500 by bolts. The bolt connection method is simple and reliable, and is easy to disassemble and replace. Since the bolts have good conductivity, such a setting can also ensure good conductivity between the copper bar and the second injection molding block 500.

[0069] Based on the first embodiment, refer to Figure 6 and Figure 7 In some embodiments of the utility model, the fastener 300 includes an elastic layer 320, the elastic layer 320 is attached to the surface of the fastener 300 perpendicular to the first direction X, the elastic layer 320 has a second limiting hole 321, the axis of the second limiting hole 321 is colinear with the axis of the first limiting hole 311, and the aperture of the second limiting hole 321 is smaller than the aperture of the first limiting hole 311, and the protrusion 120 and the winding 200 are both penetrated through the second limiting hole 321. The second limiting hole 321 is set with a smaller diameter, and has an interference fit with the combination of the winding 200 and the protrusion 120. Combined with the vibration damping of the elastic layer 320, on the one hand, it further ensures the tightness and stability of the fitting of the winding 200 and the protrusion 120, and ensures the stability of the connection between the winding 200 and the bus 100; on the other hand, it can effectively absorb and isolate the vibration generated by the bus 100 during operation, thereby reducing the noise level and improving the overall performance of the bus structure.

[0070] The second aspect of the present invention provides a motor, comprising a busbar structure of any of the above embodiments. Figures 3 to 5 The busbar structure of the utility model is provided with a fastener 300 so that the winding 200 and the protrusion 120 are fitted at the first limiting hole 311. In this way, the fastener 300 is equivalent to forming a relatively fixed support structure. This support structure can limit the relative movement of the winding 200 and the busbar 100 during the vibration process, especially reduce the vibration near the connection between the winding 200 and the protrusion 120. The high-frequency vibration near the connection between the winding 200 and the protrusion 120 is one of the main reasons for the fatigue fracture of the solder joint 400. By reducing such vibration, the stability of the connection between the winding 200 and the protrusion 120 can be effectively improved. On the one hand, the fastener 300 can disperse the stress generated during vibration from the connection between the winding 200 and the protrusion 120. The fastener 300 can not only absorb part of the vibration energy, but also disperse the stress to a wider area, thereby reducing the stress burden at the connection between the winding 200 and the protrusion 120, so that the connection between the winding 200 and the protrusion 120 is more stable. On the other hand, the first limiting hole 311 constrains the position of the winding 200 and the protrusion 120, thereby shortening the distance between the connecting part and the junction of the winding 200 and the connecting part. Therefore, after the fastener 300 is set, the mode of the bus structure is improved, and the vibration excitation frequency can be avoided and the welding position can be constrained from opening, thereby ensuring the stability of the connection between the winding 200 and the bus 100, thereby ensuring the performance stability, reliability and safety of the motor.

[0071] Reference Figure 8Specifically, the first injection block 310 can limit the opening between the winding 200 and the copper bar of the busbar 100, avoid stress on the welding position of the winding 200 and the busbar 100, and reduce the stress at the welding position. After the vibration test load excitation, the vibration intensity of the busbar 100 is simulated, and it is found that at the end of the length direction of the busbar 100, the structure of the winding 200 and the protrusion 120 is subjected to the greatest stress and is most likely to break. As a preferred embodiment, the fastener 300 of this scheme is arranged at both ends of the busbar 100 perpendicular to the first direction X to improve the improvement effect on the cracking of the weld. According to the vibration test load excitation, the vibration intensity of the busbar 100 is simulated. The stress results of the root of the welding point between the copper bar of the busbar 100 and the winding 200 of the original scheme and the scheme of the utility model are compared. It can be seen that the stress at the root of the welding point of this scheme can be reduced by more than 60%. At the same time, since the busbar 100 is connected to the lower end of the winding 200 by injection molding, the cantilever structure of the busbar 100 is shortened, the overall mode of the busbar 100 is improved, and the vibration test excitation can be avoided, solving the problem of fracture of the solder joint 400 at the welding position of the copper bar of the busbar 100 and the winding 200.

[0072] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. A busbar structure, characterized in that: include: A bus bar, comprising a main body and at least one protruding portion, wherein the protruding portion is connected to the main body and protrudes from the main body along a first direction; At least one winding is arranged in parallel with the corresponding protrusion, and one end of the winding away from the main body is conductively connected to one end of the protrusion away from the main body; At least one fastener is spaced apart from one end of the winding away from the main body, and the fastener is respectively connected to the protrusion and the corresponding winding to limit the relative displacement of the protrusion and the corresponding winding.

2. The busbar structure according to claim 1, characterized in that: The fastener has a first limiting hole, and the protrusion and the corresponding winding are both inserted into the first limiting hole.

3. The busbar structure according to claim 2, characterized in that: One end of the winding away from the main body is welded to one end of the protrusion away from the main body, and along the first direction, a welding point of the winding welded to the protrusion is exposed to the first limiting hole.

4. The busbar structure according to claim 2 or 3, characterized in that: There is a gap between the protrusion and the hole wall of the first limiting hole, and / or between the winding and the hole wall of the first limiting hole, and the gap is filled with an adhesive.

5. The busbar structure according to claim 1, characterized in that: The fastener also wraps around at least a portion of the body portion.

6. The busbar structure according to claim 1, characterized in that: The protrusion and the corresponding winding are in close contact.

7. The busbar structure according to claim 1, characterized in that: The fastener comprises a first injection-molded block, and the first injection-molded block is fixedly connected to the main body and the corresponding protrusion respectively.

8. The busbar structure according to claim 1, characterized in that: The fastener has a first limiting hole, the protrusion and the corresponding winding are both inserted into the first limiting hole, the fastener includes an elastic layer, the elastic layer is attached to the surface of the fastener perpendicular to the first direction, the elastic layer has a second limiting hole, the axis of the second limiting hole is collinear with the axis of the first limiting hole, and the aperture of the second limiting hole is smaller than the aperture of the first limiting hole; Wherein, the protrusion and the winding are both penetrated through the second limiting hole.

9. The busbar structure according to claim 1, characterized in that: The busbar structure further includes a second injection molded block, and the busbar further includes a first-phase copper bar, a second-phase copper bar, and a third-phase copper bar. The second injection molded block is connected to the fastener, and the second injection molded block also wraps at least a portion of the first-phase copper bar, and / or the second injection molded block also wraps at least a portion of the second-phase copper bar, and / or the second injection molded block also wraps at least a portion of the third-phase copper bar; and / or, The fasteners are provided at two ends of the busbar perpendicular to the first direction.

10. A motor, characterized in that: The busbar structure comprises the busbar structure as claimed in any one of claims 1 to 9.

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