Stable anti-overload vehicle-mounted low-voltage distribution box
Patent Information
- Application Number
- CN202522504119.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-26
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-11-26
AI Technical Summary
然而，车载环境具有特殊性，一方面存在剧烈振动、灰尘较多、温度波动大等问题，传统车载低压配电盒往往存在密封性能不足，易受灰尘、湿气侵入导致内部元件故障；同时，振动环境下配电盒易发生位移、松动，影响配电稳定性；另一方面，传统配电盒的过载保护机制不够可靠，当电路过载时无法及时切断电源，从而引发元件烧毁甚至安全隐患；因此，难以满足车载电子系统对配电设备高稳定性、高可靠性、强适应性的使用需求
[0006]本实用新型的有益效果是：盒体采用上防护盖、盒体主体与下底板盖的拆分式结构，配合锁紧卡扣组件实现密封锁紧，且下底板盖边缘的密封槽内嵌设氟橡胶密封圈，大幅提升了整体密封性能，有效阻挡灰尘、湿气侵入，保护内部元件免受损坏；定位卡块组件通过安装底板、连接杆与卡块的配合，能够将配电盒稳固卡接于车载槽内，结合下底板盖的定位安装座与加强筋设计，既避免了车载剧烈振动环境下的位移与松动，又增强了盒体结构强度；温度传感模块与继电器模块、主电路板模块电源回路的电连接设计，实现了过载时的快速断电保护，提升了配电使用的安全性与可靠性；盒体主体侧壁的散热孔配合内部导流板形成对流换热通道，同时散热孔内覆盖防尘网，在保障高效散热的同时防止灰尘进入，兼顾散热与防尘效果；接口模块包含多芯电源接口、信号接口及标准规格的备用扩展接口，既满足了车载低压电源稳定接入与控制信号传输需求，又为未来新增功能或设备接入提供了便利；此外，盒体主体侧端的安装孔设计，进一步方便了配电盒的快速安装固定，整体结构设计合理，适配车载复杂使用环境，显著提升了配电盒的稳定性、可靠性与实用性。
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Figure CN224923215U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle-mounted electronic equipment technology, and in particular to a stable overload-proof vehicle-mounted low-voltage power distribution box. Background Technology
[0002] With the rapid development of automotive electronics technology, the automotive low-voltage distribution box, as a core power distribution component of the automotive electronic system, plays a crucial role in distributing power and transmitting control signals to various automotive low-voltage electrical devices. However, the automotive environment has unique characteristics. On the one hand, there are problems such as severe vibration, high dust levels, and large temperature fluctuations. Traditional automotive low-voltage distribution boxes often have insufficient sealing performance, making them susceptible to dust and moisture intrusion, leading to internal component failures. At the same time, the distribution box is prone to displacement and loosening under vibration, affecting power distribution stability. On the other hand, the overload protection mechanism of traditional distribution boxes is not reliable enough. When the circuit is overloaded, it cannot cut off the power supply in time, which can lead to component burnout or even safety hazards. Therefore, it is difficult to meet the high stability, high reliability, and strong adaptability requirements of automotive electronic systems for power distribution equipment. Utility Model Content
[0003] To address some of the problems existing in the prior art, this utility model provides a stable overload-proof vehicle-mounted low-voltage power distribution box. This power distribution box can achieve stable power distribution, overload protection, and reliable installation in complex vehicle environments, ensuring the safe and stable operation of vehicle electronic systems.
[0004] To achieve the above objectives, this utility model provides a stable overload-proof vehicle-mounted low-voltage power distribution box, comprising a box body, the box body including an upper protective cover, a box body main body, and a lower bottom plate cover, the upper protective cover and the lower bottom plate cover being detachably installed on the top and bottom of the box body respectively; a locking buckle assembly is provided on the box body, and the upper protective cover, the box body main body, and the lower bottom plate cover are sealed and locked together by the locking buckle assembly to form a closed installation cavity; a main circuit board module, a relay module, and a temperature sensing module are provided inside the box body, the temperature sensing module being electrically connected to the relay module, and the relay module being electrically connected to the power circuit of the main circuit board module to realize power-off protection in case of overload; an interface module is also embedded on the box body and electrically connected to the main circuit board module for power distribution control of the vehicle-mounted low-voltage circuit; a positioning block assembly and several mounting holes are provided on the side end of the box body, and several heat dissipation holes are also provided on the side wall of the box body.
[0005] In operation, this invention first embeds the fluororubber sealing ring into the sealing groove of the lower base plate cover. Then, the lower base plate cover is installed to the bottom of the main body of the box, allowing the trapezoidal protrusion on the side wall of the main body to engage with the wedge-shaped hole of the locking frame on the side of the lower base plate cover. Simultaneously, the sealing groove seals against the bottom edge of the main body of the box. Next, the main circuit board module, relay module, and temperature sensing module are assembled inside the main body of the box, ensuring electrical connection between the temperature sensing module and the relay module, and electrical connection between the relay module and the main circuit board module's power circuit. Then, the interface module is embedded into the main body of the box and electrically connected to the main circuit board module. The first interface group of the interface module is used for stable connection to the vehicle's low-voltage power supply, the second interface group is used for transmitting control signals and data interaction with the vehicle control system, and the third interface serves as a backup expansion interface. Finally, the mounting base plate of the positioning block assembly is fixed to the side of the main body of the box with bolts. The connecting rod is vertically installed on the mounting base plate, and the locking block is positioned on the top of the connecting rod and engages with the corresponding vehicle slot. To prevent displacement or loosening during severe vehicle vibrations, the mounting holes on the side of the main body of the box are used for additional fixation. The upper protective cover is then placed on top of the main body, allowing the stepped protrusion in the side groove of the upper protective cover to engage with the snap-fit block on the side wall of the main body. This, combined with the locking frame of the lower base cover and the trapezoidal protrusion, seals the upper protective cover, the main body of the box, and the lower base cover, forming a closed mounting cavity. During daily use, the guide plate inside the main body, corresponding to the heat dissipation holes, guides external airflow along the heat dissipation gap to form a convection heat exchange channel. The dustproof mesh inside the heat dissipation holes prevents dust from entering. When an overload occurs in the circuit, the temperature sensing module detects the abnormality and triggers the relay module, which cuts off the power circuit of the main circuit board module for power-off protection. Simultaneously, the second interface group can upload the power distribution box's operating status and overload alarm information to the vehicle control system. The first interface group continuously and stably connects to the vehicle's low-voltage power supply, while the third interface is reserved for future additions of functions or equipment.
[0006] The beneficial effects of this utility model are as follows: The box adopts a split structure of upper protective cover, box body and lower bottom cover, which is used with locking buckle assembly to achieve sealing and locking. In addition, the sealing groove of the lower bottom cover edge is embedded with fluororubber sealing ring, which greatly improves the overall sealing performance, effectively prevents dust and moisture from entering, and protects the internal components from damage. The positioning block assembly, through the cooperation of mounting base plate, connecting rod and block, can firmly lock the power distribution box into the vehicle slot. Combined with the positioning mounting seat and reinforcing rib design of the lower bottom cover, it not only avoids displacement and loosening under the severe vibration environment of the vehicle, but also enhances the structural strength of the box. The electrical connection design of the temperature sensing module, relay module and main circuit board module power circuit realizes the protection of the power supply circuit under overload conditions. Rapid power-off protection enhances the safety and reliability of power distribution. The ventilation holes on the side walls of the main body, combined with the internal baffle plate, form a convection heat exchange channel. Simultaneously, a dustproof mesh covers the ventilation holes, ensuring efficient heat dissipation while preventing dust ingress, achieving a balance between heat dissipation and dust prevention. The interface module includes a multi-core power interface, a signal interface, and a standard-specification spare expansion interface, meeting the requirements for stable access to vehicle low-voltage power and control signal transmission, while also facilitating future additions of functions or equipment. Furthermore, the mounting holes on the side of the main body further facilitate rapid installation and fixation of the power distribution box. The overall structural design is reasonable, adaptable to the complex vehicle environment, and significantly improves the stability, reliability, and practicality of the power distribution box.
[0007] As a further improvement of this utility model, in order to improve installation accuracy and structural strength, and at the same time enhance sealing performance to effectively block dust and moisture, multiple positioning mounting seats are integrally formed on the lower bottom plate cover, and several reinforcing ribs are distributed on the inner wall of the lower bottom plate cover; a sealing groove is formed around the edge of the lower bottom plate cover, and the sealing groove is sealed and fitted with the bottom edge of the box body; a fluororubber sealing ring is also embedded in the sealing groove, and the cross-sectional diameter of the fluororubber sealing ring is 0.3 to 0.5 mm greater than the depth of the sealing groove.
[0008] As a further improvement of this utility model, in order to achieve precise positioning and installation and improve the stability of the power distribution box under severe vehicle vibration environment, the positioning block assembly includes a mounting base plate, a connecting rod and a locking block. The mounting base plate is fixedly connected to the main body of the box by bolts. The connecting rod is vertically installed on the mounting base plate, and the locking block is set on the top of the connecting rod and is locked into the corresponding vehicle groove for connection and positioning, so as to avoid displacement or loosening in severe vehicle vibration environment.
[0009] As a further improvement of this utility model, in order to achieve reliable locking and fixing, improve assembly stability and sealing, and reduce the risk of loosening, the locking buckle assembly includes a slot, a stepped protrusion, a buckle block, a trapezoidal protrusion, and a buckle frame; the slot is provided on the side end of the upper protective cover and there are several of them; the stepped protrusion is integrally formed in the slot; the buckle block and the trapezoidal protrusion are arranged in the same vertical line on the side wall of the box body and there are several of them; the buckle block and the stepped protrusion are interlocked and matched; the buckle frame is spaced apart on the side end of the lower bottom cover, and the buckle frame has wedge-shaped holes that match the trapezoidal protrusions; the buckle block slides into the slot and is engaged with the stepped protrusion; the trapezoidal protrusion is embedded in the wedge-shaped hole and is engaged with the buckle frame, thereby achieving the locking and fixing of the upper protective cover, the box body, and the lower bottom cover.
[0010] As a further improvement to this utility model, in order to both meet the current needs of vehicle-mounted low-voltage power distribution and signal transmission, and reserve space for future additions of functions or devices to improve scalability, the interface module includes a first interface group, a second interface group, and a third interface; the first interface group is a multi-core power interface for stable connection to the vehicle-mounted low-voltage power supply; the second interface group is a signal interface for transmitting control signals, supporting data interaction with the vehicle control system, and uploading the power distribution box's operating status and overload alarm information; the third interface is a spare expansion interface, adopting standard interface specifications to facilitate the access of future additions of functions or devices.
[0011] As a further improvement of this utility model, in order to ensure heat dissipation while preventing dust from entering the box, thus balancing heat dissipation performance and dust prevention requirements and extending service life, a guide plate is provided inside the main body of the box at the position corresponding to the heat dissipation holes, which is used to guide external airflow to form a convection heat exchange channel along the heat dissipation gap; the heat dissipation holes are also covered with a dustproof net. Attached Figure Description
[0012] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings:
[0013] Figure 1 This is a top view of the present invention.
[0014] Figure 2 This is an exploded view of the overall structure of this utility model.
[0015] The components include: 1. Box body; 11. Upper protective cover; 12. Box body main body; 13. Lower bottom plate cover; 131. Positioning mounting base; 132. Reinforcing rib; 133. Sealing groove; 2. Mounting hole; 3. Positioning block assembly; 31. Mounting base plate; 32. Connecting rod; 33. Block; 4. Locking buckle assembly; 41. Slot; 42. Stepped protrusion; 43. Buckle block; 44. Trapezoidal protrusion; 45. Locking frame; 5. Interface module; 51. First interface group; 52. Second interface group; 53. Third interface; 6. Heat dissipation hole; 7. Main circuit board module; 8. Relay module; and 9. Temperature sensing module. Detailed Implementation
[0016] To enable those skilled in the art to better understand the technical solutions in this utility model, the following description is provided in conjunction with the appendix. Figure 1-2 The present invention will be further described below. The following embodiments are only used to illustrate the technical solution of the present invention more clearly, and should not be used to limit the protection scope of the present invention.
[0017] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0018] like Figure 1-2The diagram shows a stable overload-resistant vehicle-mounted low-voltage power distribution box, comprising a box body 1. The box body 1 includes an upper protective cover 11, a box body 12, and a lower bottom cover 13. The upper protective cover 11 and the lower bottom cover 13 are detachably installed on the top and bottom of the box body 12, respectively. A locking buckle assembly 4 is provided on the box body 1, and the upper protective cover 11, the box body 12, and the lower bottom cover 13 are sealed and locked together by the locking buckle assembly 4, forming a closed installation cavity. A main circuit board module 7, a relay module 8, and a temperature sensing module 9 are installed inside the box body 12. The temperature sensing module 9 is electrically connected to the relay module 8, and the relay module 8 is electrically connected to the power circuit of the main circuit board module 7, realizing overload protection. Power failure protection during operation; the main body 12 of the box is also equipped with an interface module 5 which is electrically connected to the main circuit board module 7 for power distribution control of the vehicle low-voltage circuit; the side end of the main body 12 of the box is provided with a positioning block assembly 3 and several mounting holes 2, and several heat dissipation holes 6 are also provided on the side wall of the main body 12 of the box; multiple positioning mounting seats 131 are integrally formed on the lower bottom plate cover 13, and several reinforcing ribs 132 are distributed on the inner wall of the lower bottom plate cover 13; a sealing groove 133 is formed around the edge of the lower bottom plate cover 13, and the sealing groove 133 is sealed and fitted with the bottom edge of the main body 12 of the box; a fluororubber sealing ring is also embedded in the sealing groove 133, and the cross-sectional diameter of the fluororubber sealing ring is 0.3 to 0.5 mm larger than the depth of the sealing groove 133.5mm; The positioning block assembly 3 includes a mounting base plate 31, a connecting rod 32, and a locking block 33. The mounting base plate 31 is fixedly connected to the main body 12 of the box by bolts; The connecting rod 32 is vertically installed on the mounting base plate 31, and the locking block 33 is set on the top of the connecting rod 32 and is locked into the corresponding vehicle slot for connection and positioning, so as to avoid displacement or loosening in the severe vibration environment of the vehicle; The locking buckle assembly 4 includes a slot 41, a stepped protrusion 42, and a buckle block 4. 3. Trapezoidal protrusions 44 and locking frames 45; the slots 41 are located on the side of the upper protective cover 11 and are provided in several places; the stepped protrusions 42 are integrally formed in the slots 41; the locking blocks 43 and trapezoidal protrusions 44 are arranged in the same vertical line on the side wall of the box body 12 and are provided in several places; the locking blocks 43 and stepped protrusions 42 are interlocked and properly matched; the locking frames 45 are spaced apart on the side of the lower bottom cover 13, and the locking frames 45 have openings that correspond to... The trapezoidal protrusion 44 is adapted to the wedge-shaped hole; the latching block 43 slides into the latching groove 41 and engages with the stepped protrusion 42, and the trapezoidal protrusion 44 is embedded in the wedge-shaped hole and engages with the locking frame 45, thereby achieving the locking and fixing of the upper protective cover 11, the box body 12, and the lower bottom plate cover 13; the interface module 5 includes a first interface group 51, a second interface group 52, and a third interface 53; the first interface group 51 is a multi-core power interface for stable connection to the vehicle's low-voltage power supply; the second interface group 52 is a signal interface for transmitting control signals, supporting data interaction with the vehicle control system, and uploading the power distribution box's working status and overload alarm information; the third interface 53 is a spare expansion interface, adopting a standard interface specification, facilitating the access of future added functions or devices; a guide plate is provided inside the box body 12 at the position corresponding to the heat dissipation hole 6 to guide external airflow along the heat dissipation gap to form a convection heat exchange channel; the heat dissipation hole 6 is also covered with a dustproof net.
[0019] In operation, the fluororubber sealing ring is first embedded into the sealing groove 133 of the lower bottom plate cover 13. Then, the lower bottom plate cover 13 is installed to the bottom of the box body 12, so that the trapezoidal protrusion 44 on the side wall of the box body 12 is embedded into the wedge-shaped hole of the locking frame 45 on the side of the lower bottom plate cover 13 to achieve a fastening. Simultaneously, the sealing groove 133 is sealed and fitted to the bottom edge of the box body 12. Next, the main circuit board module 7, relay module 8, and temperature sensing module 9 are assembled into the box body 12, ensuring that the temperature sensing module 9 is electrically connected to the relay module 8, and that the relay module 8 is electrically connected to the... The power circuit of the main circuit board module 7 is electrically connected; then the interface module 5 is embedded into the main body 12 of the box and electrically connected to the main circuit board module 7. The first interface group 51 of the interface module 5 is used to stably connect to the vehicle low-voltage power supply, the second interface group 52 is used to transmit control signals and interact with the vehicle control system, and the third interface 53 is used as a spare expansion interface; then the mounting base plate 31 of the positioning block assembly 3 is fixed to the side of the main body 12 of the box with bolts, the connecting rod 32 is vertically installed on the mounting base plate 31, and the locking block 33 is set on the top of the connecting rod 32 and locks into the phase. The casing should be placed inside the vehicle compartment to prevent displacement or loosening during severe vehicle vibrations. The mounting holes 2 on the side of the main body 12 are used for additional fixation. Then, the upper protective cover 11 is placed on top of the main body 12, so that the stepped protrusion 42 in the slot 41 on the side of the upper protective cover 11 engages with the snap-fit block 43 on the side wall of the main body 12. This, combined with the locking frame 45 of the lower base cover 13 engaging with the trapezoidal protrusion 44, achieves a sealed and locked arrangement of the upper protective cover 11, the main body 12, and the lower base cover 13, forming a closed installation cavity. During daily use, the interior of the main body 12... The guide plate corresponding to the heat dissipation hole 6 guides the external airflow to form a convection heat exchange channel along the heat dissipation gap. The dustproof net inside the heat dissipation hole 6 prevents dust from entering. When the circuit is overloaded, the temperature sensing module 9 senses the abnormality and links with the relay module 8. The relay module 8 cuts off the power circuit of the main circuit board module 7 to achieve power-off protection. At the same time, the second interface group 52 can upload the working status of the power distribution box and overload alarm information to the vehicle control system. The first interface group 51 is continuously and stably connected to the vehicle low-voltage power supply. The third interface 53 is reserved for future addition of functions or equipment.
[0020] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.
Claims
1. A stable overload-resistant vehicle-mounted low-voltage power distribution box, comprising a box body (1), characterized in that: The box body (1) includes an upper protective cover (11), a box body (12), and a lower bottom cover (13). The upper protective cover (11) and the lower bottom cover (13) are respectively detachably installed on the top and bottom of the box body (12). A locking buckle assembly (4) is provided on the box body (1). The upper protective cover (11), the box body (12), and the lower bottom cover (13) are sealed and locked together by the locking buckle assembly (4) to form a closed installation cavity. The main circuit board module (7) and the relay module are provided inside the box body (12). Block (8) and temperature sensing module (9); the temperature sensing module (9) is electrically connected to the relay module (8), and the relay module (8) is electrically connected to the power circuit of the main circuit board module (7) to realize power-off protection when overloaded; the main body of the box (12) is also equipped with an interface module (5) and electrically connected to the main circuit board module (7) for power distribution control of vehicle low voltage circuit; the side end of the main body of the box (12) is provided with a positioning card block assembly (3) and several mounting holes (2), and several heat dissipation holes (6) are also provided on the side wall of the main body of the box (12).
2. The stable overload-resistant vehicle-mounted low-voltage distribution box according to claim 1, characterized in that: The lower base plate cover (13) is integrally formed with multiple positioning mounting seats (131), and the inner wall of the lower base plate cover (13) is distributed with several reinforcing ribs (132); the edge of the lower base plate cover (13) is provided with a sealing groove (133), which is sealed and fitted with the bottom edge of the box body (12); a fluororubber sealing ring is also embedded in the sealing groove (133), and the cross-sectional diameter of the fluororubber sealing ring is 0.3 to 0.5 mm greater than the depth of the sealing groove (133).
3. The stable overload-resistant vehicle-mounted low-voltage distribution box according to claim 1, characterized in that: The positioning block assembly (3) includes a mounting base plate (31), a connecting rod (32), and a locking block (33). The mounting base plate (31) is fixedly connected to the main body of the box (12) by bolts. The connecting rod (32) is vertically installed on the mounting base plate (31). The locking block (33) is set on the top of the connecting rod (32) and is locked into the corresponding vehicle slot for connection and positioning, so as to avoid displacement or loosening in the severe vibration environment of the vehicle.
4. The stable overload-proof vehicle-mounted low-voltage distribution box according to claim 1, characterized in that: The locking buckle assembly (4) includes a slot (41), a stepped protrusion (42), a buckle block (43), a trapezoidal protrusion (44), and a locking frame (45); the slot (41) is located on the side of the upper protective cover (11) and there are several of them; the stepped protrusion (42) is integrally formed in the slot (41); the buckle block (43) and the trapezoidal protrusion (44) are arranged in the same vertical line on the side wall of the box body (12) and there are several of them; the buckle block (43) The upper protective cover (11), the box body (12) and the lower base plate cover (13) are interlocked and matched; the locking frame (45) is spaced apart on the side end of the lower base plate cover (13), and the locking frame (45) is provided with a wedge-shaped hole that matches the trapezoidal protrusion (44); the buckle block (43) slides into the buckle groove (41) and is fastened and connected with the step protrusion (42), and the trapezoidal protrusion (44) is embedded in the wedge-shaped hole and is fastened and connected with the locking frame (45), thereby realizing the locking and fixing of the upper protective cover (11), the box body (12) and the lower base plate cover (13).
5. The stable overload-resistant vehicle-mounted low-voltage distribution box according to claim 1, characterized in that: The interface module (5) includes a first interface group (51), a second interface group (52), and a third interface (53); the first interface group (51) is a multi-core power interface used for stable connection to the vehicle's low-voltage power supply; the second interface group (52) is a signal interface used for transmitting control signals, supporting data interaction with the vehicle control system, and uploading the power distribution box's working status and overload alarm information; the third interface (53) is a spare expansion interface, using standard interface specifications, which facilitates the access of future added functions or devices.
6. The stable overload-proof vehicle-mounted low-voltage distribution box according to claim 1, characterized in that: Inside the main body (12) of the box, a guide plate is provided at the position corresponding to the heat dissipation hole (6) to guide the external airflow to form a convection heat exchange channel along the heat dissipation gap; the heat dissipation hole (6) is also covered with a dustproof net.