CN218919498U - Copper bar assembly and electric drive assembly - Google Patents

Abstract

The application provides a copper bar assembly and an electric drive assembly, wherein the copper bar assembly comprises a plastic bracket, and a copper bar and a rubber piece which are arranged in the plastic bracket; the copper bar comprises a copper bar main body, a first end and a second end, wherein the first end and the second end are formed by extending opposite ends of the copper bar main body; the plastic bracket is provided with an accommodating hole; the copper bar is arranged in the plastic bracket, wherein the first end part and the second end part are partially exposed out of the plastic bracket, and the copper bar main body penetrates through the accommodating hole; the rubber piece is filled in the accommodating hole. From this, set up the holding hole on the plastic support, make the main part of copper bar run through the holding hole to set up the rubber spare in the holding hole, the rubber spare can separate the copper bar into including first tip and including the two parts of second tip, because the elasticity of rubber spare is great, can effectively avoid the clearance that produces under the expend with heat and contract with cold condition by thermal expansion coefficient difference between copper bar and the plastic support, thereby lead to the relatively poor problem of copper bar leakproofness.

Description

Copper bar assembly and electric drive assembly

Technical Field

The application relates to the technical field of motor controllers, in particular to a copper bar assembly and an electric drive assembly.

Background

The motor in the automobile and the motor controller are generally connected through a copper bar assembly, the copper bar assembly is molded by adopting a metal insert injection molding process at present, and the single metal insert injection molding process cannot adapt to the sealing requirement of long-term high-low temperature periodical change due to the fact that the expansion and contraction volumes are different due to the different thermal expansion coefficients of metal and plastic or injection molding defects.

Disclosure of Invention

In order to solve the technical problem, the application provides a copper bar assembly and an electric drive assembly, which can improve the tightness of the copper bar assembly.

One aspect of the present application is: there is provided a copper bar assembly comprising: the copper bar comprises a copper bar main body, a first end part and a second end part, wherein the first end part and the second end part are formed by extending opposite ends of the copper bar main body; the plastic bracket is provided with an accommodating hole; the copper bar is arranged in the plastic bracket, wherein the first end part and the second end part are partially exposed out of the plastic bracket, and the copper bar main body penetrates through the accommodating hole; and the rubber part is filled in the accommodating hole.

Further, the first end is formed by bending and extending the first end of the copper bar main body, the second end is formed by bending and extending the second end of the copper bar main body, the extending direction of the first end is perpendicular to the extending direction of the copper bar main body, and the extending direction of the second end is perpendicular to the extending direction of the first end and the extending direction of the copper bar main body.

Further, the accommodation hole is a through hole penetrating through at least one end face of the plastic support, and an included angle between the penetrating direction of the through hole and the extending direction of the copper bar main body is greater than 0 degrees and less than or equal to 90 degrees.

Further, the copper bar is at least 3, including U looks copper bar, V looks copper bar and W looks copper bar, at least 3 the copper bar interval sets up side by side, and at least 3 the copper bar main part is vertical to be set up side by side.

Further, the copper bar assembly further comprises a magnetic ring, wherein the magnetic ring is sleeved on the outer side of the copper bar main body and is positioned in the plastic bracket; or the magnetic ring is sleeved on the outer side of the plastic support and is positioned at the corresponding position of the plastic support and the copper bar main body.

Further, the plastic support, the copper bars and the magnetic ring are integrally injection molded.

Further, the plastic bracket further comprises a mounting groove; the copper bar assembly further comprises a C-shaped magnetic ring and a Hall sensor which are accommodated in the mounting groove; the C-shaped magnetic ring is sleeved at the first end part, and the Hall sensor is arranged at a notch of the C-shaped magnetic ring.

Further, the copper bar assembly further comprises a circuit board, and the circuit board is accommodated in the mounting groove; the Hall sensor is arranged on the circuit board.

Further, an epoxy glue piece is arranged in the mounting groove, and an accommodating groove is formed in the epoxy glue piece; the C-shaped magnetic ring and the circuit board are both accommodated in the accommodating groove, and the end face of the accommodating groove, which is formed by the epoxy glue piece, is abutted to the bottom wall of the mounting groove.

In another aspect of the present application, an electric drive assembly is provided, including the copper bar assembly described above, the first end portion is connected with the motor controller, and the second end portion is connected with the motor.

The beneficial effects of this application are: the copper bar assembly comprises a plastic bracket, and copper bars and rubber pieces which are arranged in plastic; the copper bar comprises a copper bar main body, a first end and a second end, wherein the first end and the second end are formed by extending opposite ends of the copper bar main body; the plastic bracket is provided with an accommodating hole; the copper bar is arranged in the plastic bracket, wherein the first end part and the second end part are partially exposed out of the plastic bracket, and the copper bar main body penetrates through the accommodating hole; the rubber piece is filled in the accommodating hole. From this, set up the holding hole on the plastic support, make the main part of copper bar run through the holding hole to set up the rubber spare in the holding hole, the rubber spare can separate the copper bar into including first tip and including the two parts of second tip, because the elasticity of rubber spare is great, can effectively avoid the clearance that produces under the expend with heat and contract with cold condition by thermal expansion coefficient difference between copper bar and the plastic support, thereby lead to the relatively poor problem of copper bar leakproofness. In addition, the copper bar main body penetrates through the accommodating hole, namely the accommodating hole is formed in the middle of the copper bar assembly instead of the connecting part, so that the molding process of the accommodating hole and the molding process of the rubber piece are simpler.

Drawings

For a clearer description of the technical solutions in the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:

fig. 1 is a schematic perspective view of a copper bar assembly provided in the present application; the copper bar assembly comprises a copper bar;

FIG. 2 is an exploded view of the copper bar assembly of FIG. 1;

FIG. 3 is a schematic perspective view of the copper bar of FIG. 1;

fig. 4 is a partially enlarged view of fig. 2.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the description of the embodiments of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the embodiments of the present application will be understood by those of ordinary skill in the art in a specific context.

In the examples herein, a first feature "on" or "under" a second feature may be either the first and second features in direct contact, or the first and second features in indirect contact via an intermediary, unless expressly stated and defined otherwise. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In one aspect of the present application, a copper bar assembly 100 is provided, the copper bar assembly 100 including a plastic bracket 2, and a copper bar 1 and a rubber member 3 disposed within the plastic bracket 2. Referring to fig. 1-3, fig. 1 is a schematic perspective view of a copper bar assembly provided in the present application; the copper bar assembly comprises a copper bar 1; FIG. 2 is an exploded view of the copper bar assembly of FIG. 1; fig. 3 is a schematic perspective view of the copper bar 1 in fig. 1.

The copper bar 1 has a conductive function, and the copper bar 1 includes a copper bar body 11, and a first end 12 and a second end 13 extending from opposite ends of the copper bar body 11. Wherein the first end 12 and the second end 13 have a connection to external parts. It will be appreciated that when the copper bar assembly 100 is used in the automotive field and is used to connect a motor and a motor controller in an automobile, the first end 12 may be electrically connected to the motor controller and the second end 13 may be electrically connected to the motor, thereby achieving an electrical connection between the motor and the motor controller.

The plastic bracket 2 is provided with a containing hole 21, and the copper bar 1 is arranged in the plastic bracket 2. Wherein, the copper bar main body 11 penetrates through the accommodating hole 21, and the first end 12 and the second end 13 are partially exposed out of the plastic bracket 2. That is, the copper bar 1 is located in the plastic bracket 2 except for the portions of the first end 12 and the second end 13 that need to be connected to other parts, which are exposed to the plastic bracket 2. Namely, the plastic bracket 2 has the functions of supporting, insulating and sealing the copper bar 1.

The rubber member 3 is filled in the accommodation hole 21. The rubber 3 may be molded in the receiving hole 21 by injection molding. It will be appreciated that the rubber 3 is formed by two-shot moulding. Wherein the plastic holder 2 is formed at the time of the first injection molding, and the copper bar body 11 is integrally molded with the plastic holder 2 at the time of the first injection molding in the form of an insert. The through hole is formed at the time of integral injection molding, the copper bar body 11 penetrates the accommodating hole 21, and the through hole is filled with a rubber liquid at the time of secondary injection molding to form the rubber 3. Namely, the copper bar main body 11 and the plastic support 2 are connected by injection molding, so that the rubber piece 3 is formed by injection molding in a gap between the copper bar main body 11 and the accommodating hole 21, and the copper bar main body 11 penetrating through the accommodating hole 21 is wrapped by the rubber piece 3 and is not exposed to the plastic support 2, namely, the rubber piece 3 plays a role in sealing. In addition, the rubber member 3 at the accommodating hole 21 can divide the copper bar 1 into two parts including the first end 12 and the second end 13, and the problem of poor sealing performance of the copper bar 1 caused by different thermal expansion coefficients and gaps generated under the condition of thermal expansion and cold contraction can be effectively avoided due to the fact that the rubber member 3 has high elasticity and is not easily affected by high temperature of the copper bar 1.

Thus, in the copper bar assembly 100 of the present application, the accommodating hole 21 is provided in the plastic bracket 2, so that the main body of the copper bar 1 penetrates through the accommodating hole 21, and the rubber member 3 is provided in the accommodating hole 21; the rubber part 3 can divide the copper bar 1 into two parts comprising the first end part 12 and the second end part 13, and the problem that the copper bar 1 has poor tightness due to the fact that gaps between the copper bar 1 and the plastic support 2, which are generated under the condition of thermal expansion and cold contraction due to different coefficients of thermal expansion, can be effectively avoided due to the fact that the elasticity of the rubber part 3 is large. In addition, the copper bar main body 11 penetrates the accommodating hole 21, that is, the accommodating hole 21 is disposed in the middle of the copper bar assembly 100 instead of the connecting portion, so that the molding process of the accommodating hole 21 and the molding process of the rubber member 3 are simpler and are not easily affected by the arrangement of the first end portion 12 and the second end portion 13 of the copper bar 1 and the bracket connection shape.

In some embodiments, referring to fig. 3, the first end 12 is formed by bending and extending the first end of the copper bar body 11, so that the extending directions of the first end 12 and the copper bar body 11 are different. The second end 13 is formed by bending and extending the second end of the copper bar main body 11, so that the extending directions of the first end 12 and the copper bar main body 11 are different. The first end and the second end are opposite ends of the copper bar main body 11. It will be appreciated that the extending direction of the first end portion 12 is perpendicular to the extending direction of the copper bar body 11, and the extending direction of the second end portion 13 is perpendicular to both the extending direction of the first end portion 12 and the extending direction of the copper bar body 11. In short, the side wall where the thickness of the copper bar 1 is located is ignored, but only two plane surfaces perpendicular to the side wall are seen, and an included angle is formed between the surface wall of the first end portion 12 and the surface wall of the copper bar main body 11; and the surface wall of the second end portion 13 is parallel to the surface wall of the copper bar main body 11, that is, the surface wall of the second end portion 13 is perpendicular to the side wall of the copper bar main body 11. For example, referring to fig. 2, the copper bar body 11 extends in the OX direction, the first end 12 extends in the OZ direction, and the second end 13 extends in the OY direction. Thus, the copper bar assembly 100 can be made to connect two parts that are not in the same orientation. It will be appreciated that the extending directions of the first end portion 12 and the second end portion 13 of the copper bar 1 may be selected according to the arrangement range of the components to be connected by the copper bar assembly 100, that is, the extending directions of the first end portion 12 and the second end portion 13 may be selected according to specific situations, and are not limited to the above-mentioned situations perpendicular to each other.

In some specific embodiments, the receiving hole 21 is a through hole penetrating at least one end surface of the plastic bracket 2, that is, the receiving hole 21 may be a through hole or a groove provided on the plastic bracket 2. Wherein, the included angle between the penetrating direction of the penetrating hole and the extending direction of the copper bar main body 11 is more than 0 degrees and less than or equal to 90 degrees.

Referring to fig. 2 and 4, fig. 4 is a schematic view of a partial enlarged structure of fig. 2 at a viewing angle. The accommodation hole 21 is a through hole, and the direction of penetration of the through hole is the same as the extending direction of the second end portion 13, and is the OY direction. It will be appreciated that when the plastic bracket 2 and the copper bar 1 are integrally molded by injection molding, and the rubber member 3 is also molded by injection molding, the rubber member 3 may be secondarily molded after the plastic bracket 2 is molded by injection molding. The penetrating direction of the penetrating hole is the same as the extending direction of the second end 13, and the extending direction is the OY direction, so that the structure of the injection molding preparation part can be effectively simplified, and the injection molding is facilitated.

With continued reference to fig. 1-3, in some embodiments, the copper bars 1 are at least 3, including U-phase copper bars 14, V-phase copper bars 15, and W-phase copper bars 16. At least 3 copper bars 1 are arranged side by side at intervals, i.e. the copper bars 1 are not contacted. It will be appreciated that at least 3 copper bar bodies 11 may be arranged vertically side-by-side in order to further reduce the volume and mass of the copper bar assembly 100.

For example, the number of copper bars 1 is 3, and the copper bars are a U-phase copper bar 14, a V-phase copper bar 15 and a W-phase copper bar 16. The U-phase copper bar 14, the V-phase copper bar 15 and the W-phase copper bar 16 are all sheet bodies. The 3 copper bar main bodies 11 are arranged at intervals in the thickness direction, and the length direction of the 3 copper bar main bodies 11, that is, the extending direction of the 3 copper bar main bodies 11 is OX direction, the width direction is OY direction, and the thickness direction is OZ direction. Therefore, the volume of the middle part of the copper bar assembly 100 can be effectively reduced, and the strength of the middle part of the copper bar assembly 100 can be effectively increased.

The first end portions 12 of the U-phase copper bars 14, the V-phase copper bars 15 and the W-phase copper bars 16 are arranged at intervals in a transverse direction side by side and are positioned in the same plane. The second ends 13 of the U-phase copper bars 14, the V-phase copper bars 15 and the W-phase copper bars 16 are transversely arranged at intervals side by side and are positioned in the same plane. Therefore, the copper bar main bodies 11 of the 3 copper bars 1 are vertically arranged at intervals side by side, the first end parts 12 and the second end parts 13 of the 3 copper bars 1 are transversely arranged at intervals side by side, so that connection between the first end parts 12 and the second end parts 13 and other parts can be facilitated, the volume of the middle part of the copper bar assembly 100 can be effectively reduced, the structure of the copper bar assembly 100 is more compact, and the copper bar assembly 100 has enough strength.

It will be appreciated that in order to have the first ends 12 of the U-phase copper bars 14, V-phase copper bars 15 and W-phase copper bars 16 laterally spaced side by side and lie in the same plane, and the second ends 13 laterally spaced side by side and lie in the same plane. The bodies of the U-phase copper bars 14 and V-phase copper bars 15 may be provided with a connection such that the bodies of the U-phase copper bars 14 and V-phase copper bars 15 are not in the same plane.

In some specific embodiments, the copper bar assembly 100 further includes a magnetic ring 4, and the magnetic ring 4 may be annular and may be used to suppress the shaft current of the copper bar 1. The magnetic ring 4 can adopt an EMI absorption magnetic ring and can be used for inhibiting and eliminating strong electromagnetic interference and electric spark interference. Specifically, the method can inhibit noise and spike interference on the copper bar 1 and has the capability of absorbing electrostatic pulses.

The magnetic ring 4 is sleeved outside the plastic bracket 2 and is positioned at the corresponding position of the plastic bracket 2 and the copper bar main body 11, namely, the magnetic ring 4 can be positioned at the outer side of the copper bar main body 11 which is vertically arranged side by side and sleeved outside the plastic bracket 2. It can be appreciated that the magnetic ring 4 is sleeved on the outer side of the copper bar main body 11, which is vertically arranged side by side, so that the size of the magnetic ring 4 can be effectively reduced, and the overall weight of the copper bar assembly 100 can be further reduced. In some other embodiments, the magnetic ring 4 may also be sleeved on the outer side of the copper bar main body 11 and located in the plastic support 2, that is, the magnetic ring 4 is also wrapped and sealed by the plastic support 2, so long as the magnetic ring 4 is not in contact with the copper bar 1.

In some embodiments, the plastic bracket 2, the copper bar 1, and the magnetic ring 4 are injection molded as one piece. That is, during injection molding, the copper bar 1 and the magnetic ring 4 can be arranged in the injection molding cavity as inserts, then the plastic bracket 2 is formed by injection molding, and the plastic bracket 2, the copper bar 1 and the magnetic ring 4 are integrated by injection molding, so that the formation and preparation process of the copper bar assembly 100 can be effectively reduced, the connection strength between the magnetic ring 4 and plastic can be enhanced, loosening and collision are not easy to occur between the magnetic ring 4 and the plastic bracket 2, and the anti-seismic performance of the copper bar assembly 100 is improved.

In some embodiments, the copper bar assembly 100 further includes a C-shaped magnetic ring 5 and hall sensor, and the plastic bracket 2 further includes a mounting slot 22. The Hall sensor and the C-shaped magnetic ring 5 are both arranged in the mounting groove, the C-shaped magnetic ring 5 is sleeved at the first end 12, and the Hall sensor is arranged at a notch of the C-shaped magnetic ring 5. That is, the mounting groove 22 is disposed around the first end of the copper bar 1, and the C-shaped magnetic ring 5 is accommodated in the mounting groove 22 and is not in contact with the first end 12. It can be understood that when the copper bars 1 include a plurality of copper bars, the first end 12 of each copper bar 1 is sleeved with a C-shaped magnetic ring 5, and the notch of each C-shaped magnetic ring 5 is provided with 1 hall sensor, so that the current value of each copper bar can be detected through the C-shaped magnetic ring 5 and the hall sensors.

In some specific embodiments, the copper bar assembly 100 further includes a circuit board 6, which circuit board 6 may be a PCBA board. Wherein the hall sensor is arranged on the circuit board 6. That is, the hall effect can be used to monitor the current value flowing through the copper bar 1 in real time, and the monitored data information can be transmitted to the central processing unit, and if the current is too large, the power-off protection processing can be performed.

In some embodiments, an epoxy 7 is also disposed within the mounting groove 22, and the epoxy 7 may be used to seal the mounting groove 22. The epoxy glue piece 7 is provided with an accommodating groove, and the C-shaped magnetic ring 5 and the circuit board 6 are accommodated in the accommodating groove. The end face of the epoxy glue piece 7 provided with the accommodating groove is abutted with the bottom wall of the mounting groove 22, that is, the epoxy glue piece 7 can seal the parts accommodated in the mounting groove 22, so that the working stability and the service life of the epoxy glue piece can be effectively improved. It will be appreciated that the epoxy member 7 is formed by epoxy potting the mounting groove 22 after the C-shaped magnetic ring 5 and the circuit board 6 are mounted in the mounting groove 22. Wherein the epoxy resin is encapsulated and air-dried to the mounting groove 22, and the outer plane formed by the encapsulation and air-drying is at least flush with the mounting groove 22, so that the tightness of the connection part of the first end 12 and the connecting part is ensured.

Another aspect of the present application provides an electric drive assembly including a motor, a motor controller, and the copper bar assembly 100 of any of the above embodiments. The first end 12 of the copper bar 1 is connected with a motor controller and the second end 13 of the copper bar 1 is connected with a motor. The specific structure of the copper bar assembly 100 is described in detail above, and will not be described herein.

In the description of the present application, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, mechanism, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, mechanisms, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The foregoing is only the embodiments of the present application, and not the patent scope of the present application is limited by the foregoing description, but all equivalent structures or equivalent processes using the contents of the present application and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the patent protection scope of the present application.

Claims (10)

1. A copper bar assembly, comprising:

the copper bar comprises a copper bar main body, a first end part and a second end part, wherein the first end part and the second end part are formed by extending opposite ends of the copper bar main body;

the plastic bracket is provided with an accommodating hole; the copper bar is arranged in the plastic bracket, wherein the first end part and the second end part are partially exposed out of the plastic bracket, and the copper bar main body penetrates through the accommodating hole;

and the rubber part is filled in the accommodating hole.

2. The copper bar assembly according to claim 1, wherein the first end portion is formed by bending and extending a first end of the copper bar body, the second end portion is formed by bending and extending a second end of the copper bar body, an extending direction of the first end portion is perpendicular to an extending direction of the copper bar body, and an extending direction of the second end portion is perpendicular to both the extending direction of the first end portion and the extending direction of the copper bar body.

3. The copper bar assembly of claim 2, wherein,

the holding hole is a through hole penetrating through at least one end face of the plastic support, and an included angle between the penetrating direction of the through hole and the extending direction of the copper bar main body is more than 0 degrees and less than or equal to 90 degrees.

4. The copper bar assembly of claim 1, wherein the copper bar assembly,

the copper bars are at least 3, including U looks copper bar, V looks copper bar and W looks copper bar, at least 3 the copper bar interval sets up side by side, and at least 3 the copper bar main part sets up vertically side by side.

5. The copper bar assembly of claim 4, wherein the copper bar assembly,

the copper bar assembly further comprises a magnetic ring, wherein,

the magnetic ring is sleeved on the outer side of the copper bar main body and is positioned in the plastic bracket; or the magnetic ring is sleeved outside the plastic bracket and is positioned at the corresponding position of the plastic bracket and the copper bar main body.

6. The copper bar assembly of claim 5, wherein the copper bar assembly,

the plastic support, the copper bars and the magnetic ring are integrally molded.

7. The copper bar assembly of any one of claims 1-6, wherein the plastic bracket further comprises a mounting slot;

the copper bar assembly further comprises a C-shaped magnetic ring and a Hall sensor which are accommodated in the mounting groove; the C-shaped magnetic ring is sleeved at the first end part, and the Hall sensor is arranged at a notch of the C-shaped magnetic ring.

8. The copper bar assembly of claim 7, wherein the copper bar assembly,

the copper bar assembly further comprises a circuit board which is accommodated in the mounting groove; the Hall sensor is arranged on the circuit board.

9. The copper bar assembly of claim 8, wherein the copper bar assembly,

an epoxy glue piece is arranged in the mounting groove, and a containing groove is formed in the epoxy glue piece; the C-shaped magnetic ring and the circuit board are both accommodated in the accommodating groove, and the end face of the accommodating groove, which is formed by the epoxy glue piece, is abutted to the bottom wall of the mounting groove.

10. An electric drive assembly comprising a motor and a motor controller, comprising a copper bar assembly according to any one of claims 1-9, wherein the first end is connected to the motor controller and the second end is connected to the motor.

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