Direct insertion type bus bar of automobile forecabin electrical box

By designing the fitting structure of the bus bar of the front cabin of the electric box of the straight-plug car, the thickness and current carrying capacity of the bus bar are increased, the problem of inability to arrange the insurance is solved, and the long-distance arrangement of the insurance and the space optimization in the electrical box are achieved.

CN223066592UActive Publication Date: 2025-07-04HENAN THB ELECTRIC
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202422236658.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-12
Publication Date
2025-07-04
Estimated Expiration
2034-09-12

AI Technical Summary

Technical Problem

In the prior art, insurance cannot be effectively arranged near the wiring position of the electrical box in the front cabin of the car, resulting in space tightness and affecting the electrical performance and manufacturing difficulty of the electrical box.

Method used

A straight-plugged automobile front cabin electrical box bus bar is designed. Through the fitting structure between the first bus bar and the second bus bar, the bus bar thickness is increased, the current carrying capacity is improved, the safety can be arranged away from the wiring position, and the safety is connected to the safety through the plug and socket terminal structure to realize long-distance current transmission.

Benefits of technology

Effectively increasing the load capacity of the bus bar, solving the problem of inability to arrange insurance, and reducing the design difficulty and manufacturing complexity of electrical boxes.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223066592U_ABST
    Figure CN223066592U_ABST
Patent Text Reader

Abstract

The utility model relates to the technical field of automobile forecabin electric appliance boxes, in particular to a direct insertion type bus bar of an automobile forecabin electric appliance box, which solves the problem that in the prior art, fuses cannot be arranged near a wiring position in an electric appliance box, and comprises a first bus bar and a second bus bar, the front-segment attaching portion is attached to the first bus bar. The beneficial effects of the utility model are that the first bus bar and the second bus bar are attached to increase the thickness of the bus bar, thereby effectively increasing the load capacity of the bus bar, enabling the bus bar to carry out long-distance current transmission, enabling the fuse to be arranged far away from the wiring position, and solving the problems that the wiring position in the electric appliance box is limited in space, and the reliability of the electric appliance box is improved. And the insurance cannot be arranged.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the technical field of automobile front cabin electrical box, in particular to a direct-plug type automobile front cabin electrical box bus bar. Background Art

[0002] The automotive electrical box is an important component in the car. It is a collection of fuses and relays in all circuits of the vehicle, and plays the role of power distribution and circuit control. According to its position in the circuit, it can be divided into primary distribution box, secondary distribution box, tertiary distribution box, etc. The power box belongs to the primary distribution box, which is usually installed near the battery. Its load current is very large, and its structure usually adopts the form of busbar and bolt installation insurance assembly; the front cabin electrical box is a secondary distribution box, and its structure has two types: direct plug-in type and PCB type. Due to the large load current, no matter which structure is used, the busbar is generally used as a power distribution component. The current carrying capacity of the busbar directly affects the temperature rise and other electrical properties of the entire electrical box. Therefore, the busbar plays a key role in the electrical box.

[0003] In plug-in electrical boxes, fuses and relays are mostly plug-in structures, so the busbar not only needs to have a socket terminal structure that matches the fast-blow fuse and relay pins, but also a plug terminal structure that matches the slow-blow fuse. First, due to the limitations of stamping technology and terminal specifications, the thickness of the busbar is relatively thin; secondly, the socket terminal structure requires the material to have a certain ability to resist stress relaxation under high temperature conditions. The material properties with good cost performance determine that the material with high stress relaxation resistance will not have too high conductivity; thirdly, due to the limitations of the electrical box boundary and component layout, a busbar generally has both a plug terminal structure and a socket terminal structure. In this case, only materials with high stress relaxation resistance, that is, materials with relatively low conductivity, can be selected to ensure the contact performance of the product. Therefore, when designing a busbar, the designer can only meet different current-carrying capacity requirements by changing the width under the conditions of a certain thickness and a certain conductivity.

[0004] The patent with publication number CN218732259U discloses a busbar for a power distribution box in an automobile cabin, including a first busbar and a second busbar made of copper, the power-taking ends of which are connected by bolts, and a plurality of power supply pins and fixing holes are provided on the first busbar and the second busbar. The above-mentioned busbar can meet the layout and installation requirements of more fuses through the combined structural design of two buses. However, in the actual production process, the fuses connected to the busbar will take up more space in the electrical box, and the space near the wiring position of the electrical box is limited. When there are many fuses, the space at the busbar wiring position will be tight, and it is easy for the space at the wiring position to be unable to arrange all the fuses. Utility Model Content

[0005] The utility model provides a plug-in busbar for an automotive front cabin electrical box, which solves the problem that fuses cannot be arranged near the wiring position in the electrical box in the prior art.

[0006] The technical solution of the utility model is realized as follows:

[0007] A plug-in busbar for an automotive front cabin electrical box includes a first busbar and a second busbar. The second busbar includes a front section fitting portion and a rear section plugging portion. The front section fitting portion is fitted to the first busbar. The fitting of the first busbar and the second busbar increases the thickness of the busbar, which can effectively increase the current-carrying capacity, enable the busbar to conduct long-distance current transmission, and further enable the fuses to be arranged away from the wiring position, solving the problem of tight space at the wiring position in the electrical box and the inability to arrange fuses.

[0008] The first busbar includes a first current-carrying portion. One end of the first current-carrying portion is provided with a first wiring portion, and multiple plug terminal structures are provided on the upper side of the first current-carrying portion. The plug terminal structures are integrally connected to the first current-carrying portion, and the first wiring portion is integrally connected to the first current-carrying portion. The first busbar is made of a plate by punching and bending, which is convenient for the manufacture of the first busbar.

[0009] The front section fitting portion includes a second current-carrying portion. One end of the second current-carrying portion is provided with a second wiring portion. The second wiring portion is fitted to the first wiring portion, the second current-carrying portion is fitted to the first current-carrying portion, and the other end of the second current-carrying portion is connected to the rear section plugging portion. The second current-carrying portion can effectively increase the thickness of the busbar and improve the current-carrying capacity of the busbar, that is, improve the load capacity of the busbar without increasing the width of the busbar.

[0010] The rear section plugging portion includes a third current-carrying portion. The third current-carrying portion is integrally connected to the second current-carrying portion, and multiple socket terminal structures are provided on one side of the third current-carrying portion. The third current-carrying portion can extend to a relatively long distance, avoiding the concentrated arrangement of fuses at the wiring position in the electrical box and reducing the design difficulty of the electrical box.

[0011] The plug terminal structures are connected to slow-blow fuses, and the socket terminal structures are connected to fast-blow fuses. Bolt holes are provided on the first wiring portion and the second wiring portion, and bolts for wiring are inserted into the bolt holes.

[0012] First busbar hanging holes are provided on the first current-carrying portion, and first busbar relief holes are provided on the first current-carrying portion. The first busbar hanging holes and the first busbar relief holes are arranged alternately. The first busbar hanging holes are connected to the hanging spring tongues in the main body of the electrical box.

[0013] The second current-carrying part and the third current-carrying part are provided with second bus bar hanging holes, and the second current-carrying part is provided with a second bus bar relief hole. The second bus bar hanging holes on the second current-carrying part and the second bus bar relief hole are arranged alternately. The second bus bar hanging holes are connected to the hanging spring tongues in the main body of the electrical box.

[0014] The position of the first bus bar hanging hole corresponds to that of the relief hole on the second current-carrying part, and the position of the first bus bar relief hole corresponds to that of the second bus bar hanging hole on the second current-carrying part.

[0015] The size of the first bus bar relief hole is larger than that of the second bus bar hanging hole, and the size of the second bus bar relief hole is larger than that of the first bus bar hanging hole. When assembling the bus bar, the hanging spring tongues in the main body of the electrical box are connected to the first bus bar hanging hole or the second bus bar hanging hole, avoiding the situation that the hanging spring tongues contact the first bus bar relief hole or the second bus bar relief hole, resulting in hanging failure, and thus ensuring the stable installation of the bus bar in the electrical box.

[0016] The beneficial effects of the present utility model are as follows: The fitting of the first bus bar and the second bus bar will increase the thickness of the bus bar, which can effectively increase the load capacity of the bus bar, enable the bus bar to conduct long-distance current transmission, and further enable the fuse to be arranged away from the wiring position, solving the problem of the tight space at the wiring position in the electrical box and the inability to arrange the fuse. At the same time, increasing the thickness of the bus bar can reduce the width of the bus bar to a certain extent, avoid the situation of too high upper side wall of the electrical box, and reduce the difficulty of injection molding of the electrical box. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of a bus bar for a direct plug-in automotive front compartment electrical box of the present utility model;

[0019] Figure 2 It is a schematic assembly structure diagram of the bus bar and the fuse;

[0020] Figure 3 It is a schematic layout structure diagram of the bus bar in the main body of the electrical box;

[0021] Figure 4 It is a schematic hanging diagram of the bus bar in the main body of the electrical box;

[0022] Figure 5Schematic diagram of the connection of the bus bar in the electrical box body;

[0023] Figure 6 Schematic diagram of the arrangement of the connection holes and relief holes of the first bus bar;

[0024] Figure 7 Schematic diagram of the arrangement of the connection holes and relief holes of the second bus bar;

[0025] Figure 8 Schematic diagram of the structure of the first bus bar;

[0026] Figure 9 Schematic diagram of the structure of the second bus bar.

[0027] In the figure: 1. First bus bar, 2. Second bus bar, 3. First bus bar connection hole, 4. First bus bar relief hole, 5. Second bus bar connection hole, 6. Second bus bar relief hole, 7. Plug terminal structure, 8. Socket terminal structure, 9. Bolt hole, 10. First connection tongue, 11. Second connection tongue, 12. Bolt, 13. Slow-blow fuse, 14. Fast-blow fuse, 15. Electrical box body, 16. Side wall, 101. First wiring part, 102. First current-carrying part, 201. Second wiring part, 202. Second current-carrying part, 203. Third current-carrying part. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Embodiment 1, as Figure 1 、 Figure 3 shown, a direct plug-in front cabin electrical box bus bar for automobiles includes a first bus bar 1 and a second bus bar 2. The second bus bar 2 includes a front section fitting part and a rear section plugging part, and the front section fitting part is fitted with the first bus bar 1. The front section fitting part and the first bus bar 1 are connected by welding or riveting to realize the fitting of the front section fitting part and the first bus bar 1, effectively increasing the thickness of the bus bar, improving the load capacity of the bus bar, enabling the bus bar to conduct long-distance current transmission, and further enabling the fuse to be arranged away from the wiring position, solving the problem of the tight space at the wiring position in the electrical box and the inability to arrange the fuse.

[0030] Further, as Figure 8As shown, the first bus bar 1 includes a first current-carrying part 102. One end of the first current-carrying part 102 is provided with a first wiring part 101, and a plurality of plug terminal structures 7 are provided on the upper side of the first current-carrying part 102. The plug terminal structures 7 are integrally connected to the first current-carrying part 102, and the first wiring part 101 is integrally connected to the first current-carrying part 102. The first bus bar 1 is manufactured by punching and bending during production, and the production process is simple, which is convenient for the processing and production of the first bus bar 1. In this embodiment, the first current-carrying part 101 forms a U-shaped structure after being bent twice. The left side of the U-shaped structure is connected to the first wiring part 101, and plug terminal structures 7 are provided on both the upper side and the right side of the U-shaped structure. The number of the plug terminal structures 7 is 8, among which four plug terminal structures 7 are provided on the upper side of the U-shaped structure, and five plug terminal structures 7 are provided on the right side of the U-shaped structure. The plug terminal structures 7 are connected to the slow-blow fuse 13.

[0031] Further, as Figure 9 shown, the front section fitting part includes a second current-carrying part 202. One end of the second current-carrying part 202 is provided with a second wiring part 201. The second wiring part 201 is fitted to the first wiring part 101, the second current-carrying part 202 is fitted to the first current-carrying part 102, and the other end of the second current-carrying part 202 is connected to the rear section plug-in part. The second current-carrying part 202 is a U-shaped structure. The second current-carrying part 202 is located outside the first current-carrying part 102, and the widths of the second current-carrying part 202 and the first current-carrying part 102 are equal.

[0032] Further, the rear section plug-in part includes a third current-carrying part 203. The third current-carrying part 203 is integrally connected to the second current-carrying part 202, and a plurality of socket terminal structures 8 are provided on one side of the third current-carrying part 203. In this embodiment, the number of the socket terminal structures 8 is 18, and the socket terminal structures 8 are connected to the fast-blow fuse 14.

[0033] Further, as Figure 2 、 Figure 3 shown, the plug terminal structures 7 are connected to the slow-blow fuse 13, and the socket terminal structures 8 are connected to the fast-blow fuse 14. The bus bar is hung on the electrical box main body 15. When the slow-blow fuse 13 and the fast-blow fuse 14 are assembled with the electrical box main body 15, they are respectively inserted into the bus bar 1 and the bus bar 2.

[0034] Further, bolt holes 9 are provided on the first wiring part 101 and the second wiring part 201, and bolts 12 for wiring are inserted into the bolt holes 9. When wiring the electrical box, the wire harness is connected to the bolt 12, and then a nut is installed on the bolt 12 to press the wire harness, and the wire harness is connected to the wiring part of the bus bar.

[0035] Embodiment 2, on the basis of Embodiment 1, a direct plug-in type bus bar for an automotive front cabin electrical box, as Figure 6As shown, a first bus bar hanging hole 3 is provided on the first current-carrying part 102, and a first bus bar clearance hole 4 is provided on the first current-carrying part 102. The first bus bar hanging hole 3 and the first bus bar clearance hole 4 are arranged alternately. As Figure 7 shown, second bus bar hanging holes 5 are provided on the second current-carrying part 202 and the third current-carrying part 203, and a second bus bar clearance hole 6 is provided on the second current-carrying part 202. The second bus bar hanging holes 5 and the second bus bar clearance hole 6 on the second current-carrying part 202 are arranged alternately.

[0036] Furthermore, the position of the first bus bar hanging hole 3 corresponds to that of the second bus bar clearance hole 6, and the position of the first bus bar clearance hole 4 corresponds to that of the second bus bar hanging hole 5 on the second current-carrying part 202. The size of the first bus bar clearance hole 4 is larger than that of the second bus bar hanging hole 5, and the size of the second bus bar clearance hole 6 is larger than that of the first bus bar hanging hole 3.

[0037] Furthermore, as Figure 4 、 Figure 5 shown, a first hanging spring tongue 10 and a second hanging spring tongue 11 are provided in the electrical box body 15. After the bus bar is connected to the electrical box body 15, the first bus bar hanging hole 3 is hung on the second hanging spring tongue 11, and the second bus bar hanging hole 5 is hung on the first hanging spring tongue 10. In addition, after the bus bar is connected to the electrical box body 15, the side wall 16 in the electrical box body 15 plays a protective role for the bus bar. The width of the bus bar is associated with the height H of the side wall 16. In this embodiment, the load capacity of the bus bar is increased by increasing the thickness of the bus bar, so as to avoid the increase of the height difference h between the bus bar and the end face of the wire harness terminal hole caused by the increase of the bus bar width, reduce the injection molding difficulty of the electrical box body 15, and facilitate the manufacture of the electrical box.

[0038] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A direct plug-in busbar for an automotive front compartment electrical box, comprising a first busbar (1) and a second busbar (2), characterized in that, The second bus bar (2) includes a front section fitting portion and a rear section plugging portion, and the front section fitting portion is fitted to the first bus bar (1).

2. The bus bar of the plug-in automotive front compartment electrical box according to claim 1, characterized in that, The first bus bar (1) includes a first current-carrying portion (102). One end of the first current-carrying portion (102) is provided with a first wiring portion (101), and a plurality of plug terminal structures (7) are provided on the upper side of the first current-carrying portion (102).

3. The bus bar of the plug-in front cabin electrical box for automobiles according to claim 2, wherein The front section fitting portion includes a second current-carrying portion (202). One end of the second current-carrying portion (202) is provided with a second wiring portion (201). The second wiring portion (201) is fitted to the first wiring portion (101), the second current-carrying portion (202) is fitted to the first current-carrying portion (102), and the other end of the second current-carrying portion (202) is connected to the rear section plugging portion.

4. The bus bar of the direct plug-in electrical box for the front compartment of an automobile according to claim 3, characterized in that, The rear section plugging portion includes a third current-carrying portion (203). The third current-carrying portion (203) is integrally connected to the second current-carrying portion (202), and a plurality of socket terminal structures (8) are provided on one side of the third current-carrying portion (203).

5. The straight plug-in busbar for the front compartment electrical box of an automobile according to claim 4, characterized in that, The plug terminal structure (7) is connected to the slow-blow fuse (13), and the socket terminal structure (8) is connected to the fast-blow fuse (14).

6. The bus bar of the plug-in automotive front compartment electrical box according to any one of claims 3, 4, and 5, characterized in that, Bolt holes (9) are provided on the first wiring portion (101) and the second wiring portion (201), and bolts (12) for wiring are inserted into the bolt holes (9).

7. The straight plug-in busbar for the electrical box in the front compartment of an automobile according to claim 6, wherein, A first bus bar hanging hole (3) and a first bus bar clearance hole (4) are provided on the first current-carrying portion (102), and the first bus bar hanging hole (3) and the first bus bar clearance hole (4) are arranged alternately.

8. The busbar of the plug-in automotive front compartment electrical box according to claim 7, characterized in that, Second bus bar hanging holes (5) are provided on the second current-carrying portion (202) and the third current-carrying portion (203), and a second bus bar clearance hole (6) is provided on the second current-carrying portion (202). The second bus bar hanging holes (5) on the second current-carrying portion (202) and the second bus bar clearance hole (6) are arranged alternately.

9. The busbar of the plug-in automotive front compartment electrical box according to claim 8, wherein, The position of the first bus bar hanging hole (3) corresponds to that of the second bus bar clearance hole (6), and the position of the first bus bar clearance hole (4) corresponds to that of the second bus bar hanging hole (5) on the second current-carrying portion (202).

10. The bus bar of the plug-in automotive front compartment electrical box according to claim 9, characterized in that, The size of the first bus bar clearance hole (4) is larger than that of the second bus bar hanging hole (5), and the size of the second bus bar clearance hole (6) is larger than that of the first bus bar hanging hole (3).