An electric connection structure for a power transmission line

Abstract

The utility model relates to the field of connecting device's spare parts, concretely relates to a power transmission line electric connection structure. The utility model discloses a whole aluminium row is used as the power transmission line to the manufacturing precision requirement of whole vehicle is higher in prior art, improves the manufacturing cost of whole vehicle's problem. The power transmission line electric connection structure includes the switching shell, is equipped with the conductive row wear cavity and cable wear cavity of mutual conduction in switching shell, is equipped with the connection operation mouth in the position department of two wear cavities of switching shell and is conduction, and the conductive row and cable are respectively worn into the corresponding wear cavity and the end is connected in the position department with the connection operation mouth, and the installation cover that has blocked and sealed it is at the connection operation mouth. Thus, when wiring to the vehicle body, even if the whole vehicle has certain manufacturing error, the connection of the conductive row can not be affected by the flexibility of the cable absorbing the error, the whole vehicle can have certain assembly manufacturing error, and the manufacturing cost of the whole vehicle is reduced.

Description

Technical Field

[0001] This utility model relates to the field of components for connecting devices, and specifically to an electrical connection structure for power transmission lines. Background Technology

[0002] With the rapid development of the electric vehicle industry, cost and high-current fast charging have become major considerations in vehicle manufacturing. Therefore, current electric vehicles use aluminum busbars, which offer fast charging speeds and low cost, as power transmission lines. However, aluminum busbars are rigid and lack flexibility, and the internal structural layout of the vehicle is relatively complex. Even after the aluminum busbars are manufactured according to the predetermined route within the vehicle, manufacturing and installation errors in the vehicle's structure can make installation difficult or impossible. Ensuring reliable connections between aluminum busbars requires high manufacturing precision for the entire vehicle, increasing overall manufacturing costs. Utility Model Content

[0003] The purpose of this utility model is to provide an electrical connection structure for power transmission lines, so as to solve the problem that the use of aluminum busbars as the entire power transmission line in the prior art requires high manufacturing precision for the whole vehicle, which increases the manufacturing cost of the whole vehicle.

[0004] The present invention discloses an electrical connection structure for a power transmission line, comprising a transfer housing, wherein a line passage channel is provided inside the transfer housing, the line passage channel comprising a conductive busbar passage cavity and a cable passage cavity that are interconnected, and a connection operation port is provided on the transfer housing at the position where the two passage cavities are interconnected, wherein the conductive busbar and the cable are respectively inserted into the corresponding passage cavity and the ends are connected at the position corresponding to the connection operation port to form a conductive line, and the connection operation port is provided with a mounting cover to block and seal it.

[0005] Furthermore, a fixing screw hole is provided on the adapter housing at a position opposite to the connection operation port. The end of the cable is connected to a wire lug. The connecting bolt passes through the connecting holes on the conductive busbar and the wire lug in sequence and is screwed into the fixing screw hole to press the conductive busbar and the end of the cable tightly connected.

[0006] Furthermore, the materials of the pressing and bonding surfaces of the conductive busbar and the lug are the same.

[0007] Furthermore, the conductive busbar insertion cavity has a conductive busbar positioning cavity wall for stopping and positioning the end of the conductive busbar, and the cable insertion cavity has a cable lug positioning cavity wall for stopping and positioning the end of the cable lug. The positioning cavity walls of the two insertion cavities ensure that the connection holes on the conductive busbar and the cable lug correspond when they are inserted into the corresponding insertion cavities.

[0008] Furthermore, the conductive busbar insertion cavity and the cable insertion cavity are arranged parallel to each other or at a certain angle, and the orientation of the connection operation port is perpendicular to the two insertion cavities.

[0009] Furthermore, the connection port is a circular opening. The mounting cover is installed on the connecting bolt, and after the connecting bolt is tightened to the ends of the conductive busbar and cable, the mounting cover seals the connection port.

[0010] Furthermore, the mounting cover is independently installed and detachably connected to the adapter housing via fasteners.

[0011] Furthermore, the line passageways inside the adapter housing are arranged in pairs, and the two passage cavities of the line passageways are respectively for the positive and negative lines of the DC transmission line to pass through.

[0012] Furthermore, each line passageway is equipped with the aforementioned connection operation port, and all connection operation ports share the same mounting cover.

[0013] Furthermore, the adapter housing has a connection structure on the side opposite to the connection operation port for fixing it to the vehicle body.

[0014] This utility model proposes a pioneering solution that uses an adapter housing to connect the busbar and cable to form a power transmission line with a flexible portion. When wiring to the vehicle body, even if there are certain manufacturing errors in the whole vehicle, the flexibility of the cable can absorb the errors and ensure that the connection with the busbar is not affected. In this way, a certain amount of assembly and manufacturing error can be allowed in the whole vehicle, reducing the manufacturing cost of the whole vehicle. Attached Figure Description

[0015] Figure 1 This is an exploded view of an electrical connection structure for a power transmission line according to this utility model;

[0016] Figure 2 This is a cross-sectional view of an electrical connection structure for a power transmission line according to the present invention.

[0017] In the diagram: 1. Adapter housing; 11. Conductor bar insertion cavity; 12. Cable insertion cavity; 13. Conductor bar tail cap; 14. Cable tail cap; 15. Conductor bar sealing ring; 16. Cable sealing ring; 17. Clip protrusion; 18. Cylinder groove; 19. Extended groove; 20. Mounting cover; 21. Mounting bolt; 22. Conductor bar positioning cavity wall; 23. Cable lug positioning cavity wall; 24. End cap sealing ring; 25. Connection operation port; 2. Conductor bar; 3. Cable; 4. Cable lug; 5. Copper ring; 6. Connecting bolt; 7. Fixing nut; 8. Embedded nut. Detailed Implementation

[0018] This utility model proposes a pioneering solution. The core concept of this utility model is: by using an adapter housing to connect the busbar and the cable to form a power transmission line with a flexible part, even if there are certain manufacturing errors in the vehicle body when wiring to the vehicle body, the cable flexibility can absorb the errors and ensure that the connection with the busbar is not affected. In this way, a certain amount of assembly and manufacturing error can be allowed in the vehicle, reducing the manufacturing cost of the vehicle.

[0019] Based on the above concept, the present invention provides an electrical connection structure for a power transmission line, including as follows: Figure 1 The adapter housing 1 shown has a wiring passageway inside, which includes a conductive busbar insertion cavity 11 and a cable insertion cavity 12 that are interconnected. A connection operation port 25 is provided on the adapter housing 1 at the point where the two insertion cavities are interconnected. The conductive busbar 2 and the cable 3 are respectively inserted into their corresponding insertion cavities, and their ends are connected at the position corresponding to the connection operation port 25 to form a conductive line. A mounting cover 20 is provided at the connection operation port 25 to seal it. Specifically, the mounting cover 20 and the connection operation port 25 are sealed by an end cap sealing ring 24. The cable 3 has a diameter that meets the power transmission requirements and has a certain degree of flexibility. Even if there are certain manufacturing errors in the vehicle during the adapter connection, the flexibility of the cable 3 can absorb the errors and ensure that its connection with the conductive busbar 2 is not affected. Thus, a certain degree of assembly and manufacturing error is allowed in the vehicle, reducing the overall manufacturing cost.

[0020] like Figure 1 As shown, the adapter housing 1 is cylindrical in shape. The conductive busbar insertion cavity 11 and the cable insertion cavity 12 are arranged parallel to each other and face each other. The orientation of the connection operation port 25 is perpendicular to the two insertion cavities. A conductive busbar end cap 13 is installed at the opening of the conductive busbar insertion cavity 11, and a cable end cap 14 is installed at the opening of the cable insertion cavity 12. Both the outer peripheral surfaces of the conductive busbar insertion cavity 11 and the cable insertion cavity 12 are provided with locking protrusions 17. The conductive busbar end cap 13 is provided with a cylindrical part that fits around the outer periphery of the conductive busbar insertion cavity 11. The cylindrical part is provided with a cylindrical groove 18 that can cooperate with the corresponding locking protrusion 17. The cable end cap 14 is provided with an extended groove 19 that extends towards and cooperates with the corresponding locking protrusion 17. In this way, the conductive busbar end cap 13 and the cable end cap 14 can be installed. A conductive busbar sealing ring 15 is installed in the conductive busbar insertion cavity 11, and a cable sealing ring 16 is installed in the cable insertion cavity 12, so as to achieve sealing of the corresponding insertion cavities.

[0021] like Figure 1 , Figure 2As shown, a fixing nut 7 is provided on the adapter housing 1 opposite to the connection operation port 25. A wire lug 4 is connected to the end of the cable 3. A connecting bolt 6 passes through the connecting holes on the conductive busbar 2 and the wire lug 4 and is screwed into the fixing screw hole of the fixing nut 7 to press the ends of the conductive busbar 2 and the cable 3 tightly together. The connection between the cable 3 and the conductive busbar 2 is achieved through the connecting bolt 6, ensuring the reliability of the connection. The conductive busbar 2 is made of aluminum. Specifically, a copper ring 5 is welded to the side of the aluminum busbar that contacts the wire lug 4. The wire lug 4 connected to the end of the cable 3 is made of copper. Specifically, the wire lug 4 is a copper busbar ultrasonically welded to the cable 3, and a connecting hole is provided on the copper busbar for the connecting bolt 6 to pass through. Thus, the materials of the pressing and contacting surfaces of the aluminum busbar and the wire lug 4 are the same. This reduces the resistance of the connection between the conductive busbar 2 and the wire lug 4, avoids electrochemical corrosion, and ensures the reliability of the connection between the conductive busbar 2 and the cable 3.

[0022] like Figure 2 As shown, the conductive busbar insertion cavity 11 has a conductive busbar positioning cavity wall 22 for stopping and positioning the end of the conductive busbar 2, and the cable insertion cavity 12 has a cable lug positioning cavity wall 23 for stopping and positioning the end of the cable lug 4. The positioning cavity walls of the two insertion cavities ensure that the connection holes on the conductive busbar 2 and the cable lug 4 correspond when they are inserted into the corresponding insertion cavities. In this way, over-insertion or incomplete insertion of the conductive busbar 2 and the cable 3 can be avoided, allowing for quick positioning and improving the connection efficiency of the two.

[0023] like Figure 1 As shown, the adapter housing 1 has two staggered line passageways, with two through-cavities for the positive and negative poles of the DC transmission line to pass through, respectively. Each line passageway has a corresponding connection port 25, and both ports share the same mounting cover 20. The mounting cover 20 is detachably connected to the adapter housing 1 via fasteners (mounting bolts 21), and an end cap sealing ring 24 is installed between the mounting cover 20 and the adapter housing 1 to ensure insulation and sealing. Figure 1 As shown, the adapter housing 1 is provided with a recessed nut 8 at a position corresponding to the connection operation port 25. The mounting bolt 21 passes through the mounting hole on the mounting cover 20 and is screwed into the recessed nut 8 to install the mounting cover 20.

[0024] The adapter housing 1 has a connection structure on the side opposite to the connection operation port 25 for fixing it to the vehicle body. Specifically, as shown... Figure 1 As shown, the adapter housing 1 has an embedded nut 8 on the side opposite to the connection operation port 25. During installation, the adapter housing 1 is first installed on the sheet metal. At this time, a bolt can be used to pass through the sheet metal and screw into the embedded nut 8. Then, the sheet metal is installed on the vehicle body to realize the connection between the adapter housing and the vehicle body.

[0025] Regarding the installation of the adapter housing and the vehicle body, this utility model also provides other embodiments. In one embodiment, the adapter housing is provided with bolt through holes. The bolts pass through the bolt through holes and are screwed onto the sheet metal by screwing with nuts. The adapter housing is then installed onto the vehicle body via the sheet metal. In another embodiment, the connecting structure can also be provided on the side wall of the adapter housing.

[0026] Regarding the number of mounting covers, this utility model also provides another embodiment. In another embodiment, the mounting covers may be set to two and correspond to two connection operation ports respectively.

[0027] Regarding the connection operation port, this utility model also provides another embodiment. In this embodiment, the connection operation port is a circular port, and the mounting cover is also circular and installed on the bolt head of the connecting bolt. The mounting cover has a screw-fitting surface for cooperating with a screw wrench. After the connecting bolt presses the end of the conductive busbar and the cable, the mounting cover seals the connection operation port.

[0028] Regarding the connection of the conductive busbar and the cable, this utility model also provides another embodiment. In this embodiment, the conductive busbar and the cable can also be connected by welding. In this case, the connection port needs to have a certain space to facilitate the welding operation.

[0029] Regarding the layout of the conductive busbar insertion cavity and the cable insertion cavity, this utility model also provides another embodiment. In another embodiment, the conductive busbar insertion cavity and the cable insertion cavity can also be arranged at a certain angle, and the orientation of the connection operation port is perpendicular to the two insertion cavities.

[0030] Regarding the materials of the conductive busbar and the lug, this utility model also provides other embodiments. In one embodiment, the conductive busbar and the lug may both be made of aluminum; in another embodiment, the conductive busbar and the lug may be made of different materials.

[0031] Regarding the number of line passages, this utility model also provides another implementation method. In another implementation method, the number of line passages may be set to only one, which is used to pass through the conductive busbar and cable on the same line (positive line or negative line).

[0032] Regarding the formation of the fixing screw hole, this utility model also provides another embodiment. In another embodiment, a threaded hole is provided inside the adapter housing at a position opposite to the connection operation port. That is, the threaded hole is directly formed on the adapter housing, and the threaded hole constitutes the fixing screw hole.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. An electrical connection structure for a power transmission line, characterized in that: The device includes a transfer housing (1), which has a line passage channel. The line passage channel includes a conductive busbar passage cavity (11) and a cable passage cavity (12) that are interconnected. The transfer housing (1) has a connection operation port (25) at the position where the two passage cavities are interconnected. The conductive busbar (2) and the cable (3) are respectively inserted into the corresponding passage cavity and their ends are connected at the position corresponding to the connection operation port (25) to form a conductive line. The connection operation port (25) has an installation cover (20) that blocks and seals it.

2. The power transmission line electrical connection structure according to claim 1, characterized in that: The adapter housing (1) is provided with a fixing screw hole at the position opposite to the connection operation port (25). The end of the cable (3) is connected to a wire lug (4). The connecting bolt (6) passes through the connecting holes on the conductive busbar (2) and the wire lug (4) in sequence and is screwed into the fixing screw hole to press the ends of the conductive busbar (2) and the cable (3) tightly connected.

3. The power transmission line electrical connection structure according to claim 2, characterized in that: The materials of the pressing and bonding surfaces of the conductive busbar (2) and the wire lug (4) are the same.

4. The power transmission line electrical connection structure according to claim 2 or 3, characterized in that: The conductive bar insertion cavity (11) has a conductive bar positioning cavity wall (22) for blocking and positioning the end of the conductive bar (2), and the cable insertion cavity (12) has a cable lug positioning cavity wall (23) for blocking and positioning the end of the cable lug (4). The positioning cavity walls of the two insertion cavities ensure that the connection holes on the conductive bar (2) and the cable lug (4) correspond when they are inserted into the corresponding insertion cavities.

5. The power transmission line electrical connection structure according to any one of claims 1-3, characterized in that: The conductive busbar insertion cavity (11) and the cable insertion cavity (12) are arranged in parallel and facing each other, or at a certain angle, and the orientation of the connection operation port (25) is perpendicular to the two insertion cavities.

6. The power transmission line electrical connection structure according to claim 2 or 3, characterized in that: The connection operation port (25) is a circular opening. The mounting cover (20) is installed on the connecting bolt (6). After the connecting bolt (6) presses the ends of the conductive busbar (2) and the cable (3), the mounting cover (20) seals the connection operation port (25).

7. The power transmission line electrical connection structure according to claim 2 or 3, characterized in that: The mounting cover (20) is set independently and is detachably connected to the adapter housing (1) by fasteners.

8. The power transmission line electrical connection structure according to any one of claims 1-3, characterized in that: The line passage channels inside the adapter housing (1) are arranged in pairs, and the two passage cavities of the line passage channels are respectively for the positive and negative lines of the DC transmission line to pass through.

9. The electrical connection structure for transmission lines according to claim 8, characterized in that: Each line passageway is equipped with the aforementioned connection operation port (25), and all connection operation ports (25) share the same mounting cover (20).

10. The power transmission line electrical connection structure according to any one of claims 1-3, characterized in that: The adapter housing (1) has a connection structure on the side opposite to the connection operation port (25) for fixing it to the vehicle body.

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