Trailer device with electricity taking function
By designing a trailer unit with power extraction capabilities, combining mechanical connections with an electrical power extraction system, stable power support is provided during trailer operation. This solves the problem that traditional trailer units cannot provide sufficient power support, achieving safe, stable, and versatile trailer functionality and expanding application scenarios.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2026-04-03
AI Technical Summary
Traditional trailer-mounted equipment cannot meet the power support needs of the towed equipment during the towing process, especially in fields such as rescue, RV towing, and construction machinery transportation, where it cannot provide additional power support such as lighting and equipment operation.
Design a trailer unit with power extraction function. Through the combination of crossbeam, trailer hook, power input port, OBC on-board charger and power output components, realize mechanical connection and electrical power extraction system, and use the vehicle's on-board power supply to provide stable power support for external devices.
It achieves reliable traction and stable power supply during trailer operation, ensuring safety and stability, meeting diverse needs, expanding the application scenarios of trailer equipment, improving convenience and practicality, and reducing the need to carry an additional generator or find a power outlet.
Smart Images

Figure CN224075359U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts technology, specifically a trailer hitchhiking device with power extraction function. Background Technology
[0002] With the rapid development of hybrid and pure electric vehicles, and the increasing popularity of outdoor travel and leisure activities such as RV travel and towed yacht travel, the functional requirements for trailer kits are becoming increasingly diversified. Traditional trailer kits mainly realize the mechanical connection and towing function, used to connect the towed vehicle to the towing vehicle to ensure stability and safety during driving.
[0003] However, in fields such as rescue, RV towing, and construction machinery transportation, towed equipment often requires additional power support, such as for lighting, communication, and equipment operation. Traditional trailer hitches cannot meet these needs; therefore, developing rear trailer hitches with power extraction capabilities has become an urgent industry requirement. Such devices can provide power support to the towed vehicle or external equipment during towing, greatly expanding the application scenarios and practicality of trailer hitches. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a trailer device with power extraction function, which solves the problem that the towed equipment often requires additional power support, and traditional trailer devices cannot meet these needs.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a trailer device with power extraction function, comprising:
[0006] The crossbeam connects to the car;
[0007] The trailer hitch is fixedly installed on the crossbeam;
[0008] The power input port is fixedly installed on the crossbeam and connected to the vehicle's onboard power supply.
[0009] The OBC on-board charger is fixedly installed on the crossbeam and connected to the power input port;
[0010] A power output element is fixedly installed on the outside of the trailer hook, and the power output element is connected to the OBC on-board charger;
[0011] By utilizing the power input port, the vehicle's on-board power is converted into a stable current through the OBC on-board charger. External devices can then be connected to the power output components to obtain a stable power supply, thus expanding the vehicle's applications.
[0012] Preferably, mounting bracket assemblies are installed at both ends of the crossbeam, and the mounting bracket assemblies on both sides are connected to the rear longitudinal beam assembly of the vehicle body.
[0013] Preferably, the mounting bracket assembly is connected to the crossbeam and the rear longitudinal beam assembly of the vehicle body by bolts.
[0014] Preferably, the crossbeam, trailer hook, mounting bracket assembly, and rear longitudinal beam assembly are made of high-strength steel with a yield strength higher than 340 MPa.
[0015] Preferably, the vehicle power supply, power input port, OBC vehicle charger, and power output components are connected by a wired connection.
[0016] Preferably, the power output element can be configured as a power output port.
[0017] Preferably, the power output element can be configured as a socket box.
[0018] Preferably, the OBC on-board charger has built-in rectification, voltage regulation, and filtering circuits to convert the on-board power input at the power input port into 220V power.
[0019] Preferably, the power output element is mounted on the outside of the trailer hook via a fixed bracket.
[0020] Preferably, the end of the trailer hook near the crossbeam is located below the crossbeam.
[0021] This utility model discloses a trailer device with power extraction function, which has the following beneficial effects:
[0022] 1. This trailer hitch with integrated power supply integrates mechanical connections and an electrical power supply system, achieving reliable traction and stable power supply during towing. This device not only ensures safety and stability during towing but also provides continuous and stable power support for the towed vehicle or external equipment, meeting diverse user needs during towing. The integrated power supply significantly expands the application scenarios of trailer hitchs. Through this power supply function, users can provide power to towed equipment during towing without needing to carry a generator or find a power outlet, improving the convenience and practicality of the vehicle.
[0023] 2. This trailer hitch with power extraction capability connects to the tractor unit via a crossbeam and trailer hook, enabling mechanical towing. The crossbeam, trailer hook, mounting bracket assembly, and rear longitudinal beam assembly are constructed of high-strength steel to ensure reliable operation under various working conditions, preventing breakage and deformation, and ensuring driving safety. The use of high-strength steel and modular design makes the trailer hitch components more durable, improving the unit's durability and maintainability, facilitating maintenance and replacement, and reducing operating costs.
[0024] 3. This trailer-mounted device with power extraction capability connects to the towing vehicle via the vehicle's power input port after connection. The power is then rectified, regulated, and filtered by the OBC on-board charger, converting the on-board power into a stable 220V supply. Finally, external devices connect to the trailer-mounted device via power output components to obtain the necessary power. The entire power extraction process is stable and reliable, meeting the power needs of the towed equipment during towing. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0027] Figure 2 This is a partial structural diagram of the present utility model.
[0028] Figure 3 This is a schematic diagram of the principle of this utility model.
[0029] In the diagram: 1. Crossbeam; 2. Trailer hook; 3. Power input port; 4. OBC on-board charger; 5. Power output component; 6. Mounting bracket assembly; 7. Rear longitudinal beam assembly. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0031] This application provides a trailer-mounted device with integrated power supply, solving the problem that traditional trailer-mounted devices often fail to meet the additional power requirements of towed equipment. By integrating mechanical connections with an electrical power supply system, reliable traction and stable power supply are achieved during towing. This device not only ensures safety and stability during towing but also provides continuous and stable power support for the towed vehicle or external equipment, meeting the diverse needs of users during towing. The trailer-mounted device with integrated power supply can provide power support for the towed vehicle or external equipment, greatly expanding the application scenarios of trailer-mounted devices. Through the power supply function, users can provide power to the towed equipment during towing without having to carry an additional generator or find a power outlet, improving the convenience and practicality of the vehicle.
[0032] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.
[0033] Example 1
[0034] This utility model discloses a trailer device with power extraction function.
[0035] According to the appendix Figure 1-3 As shown, it includes:
[0036] Crossbeam 1, which is connected to the car;
[0037] Trailer hook 2 is fixedly installed on crossbeam 1;
[0038] Power input port 3 is fixedly installed on crossbeam 1 and connected to the vehicle's on-board power supply;
[0039] The OBC on-board charger 4 is fixedly installed on the crossbeam 1 and connected to the power input port 3;
[0040] The power output element 5 is fixedly installed on the outside of the trailer hook 2, and the power output element 5 is connected to the OBC on-board charger 4;
[0041] The vehicle's onboard power is converted into a stable current by the OBC onboard charger 4 through the power input port 3. External devices are connected through the power output component 5 to obtain a stable power supply, thus expanding the vehicle's applications.
[0042] Furthermore, mounting bracket assemblies 6 are installed at both ends of the crossbeam 1, and the mounting bracket assemblies 6 on both sides are connected to the rear longitudinal beam assembly 7 of the vehicle body.
[0043] Furthermore, the mounting bracket assembly 6 is connected to the crossbeam 1 and the rear longitudinal beam assembly 7 of the vehicle body by bolts.
[0044] Furthermore, the crossbeam 1, trailer hook 2, mounting bracket assembly 6, and rear longitudinal beam assembly 7 are made of high-strength steel with a yield strength higher than 340MPa.
[0045] Furthermore, the end of the trailer hook 2 near the crossbeam 1 is positioned below the crossbeam 1.
[0046] The trailer hitch is connected to the tractor unit via crossbeam 1 and trailer hook 2, enabling mechanical towing. Crossbeam 1, trailer hook 2, mounting bracket assembly 6, and rear longitudinal beam assembly 7 are constructed of high-strength steel to ensure reliable operation under various working conditions, preventing breakage and deformation, and ensuring driving safety. The use of high-strength steel and modular design makes the trailer hitch components more durable, improving the unit's durability and maintainability, facilitating maintenance and replacement, and reducing operating costs.
[0047] Example 2
[0048] This utility model discloses a trailer device with power extraction function.
[0049] According to the appendix Figure 1-3 As shown, it includes:
[0050] Crossbeam 1, which is connected to the car;
[0051] Trailer hook 2 is fixedly installed on crossbeam 1;
[0052] Power input port 3 is fixedly installed on crossbeam 1 and connected to the vehicle's on-board power supply;
[0053] The OBC on-board charger 4 is fixedly installed on the crossbeam 1 and connected to the power input port 3;
[0054] The power output element 5 is fixedly installed on the outside of the trailer hook 2, and the power output element 5 is connected to the OBC on-board charger 4;
[0055] The vehicle's onboard power is converted into a stable current by the OBC onboard charger 4 through the power input port 3. External devices are connected through the power output component 5 to obtain a stable power supply, thus expanding the vehicle's applications.
[0056] By integrating mechanical connections and an electrical power supply system, reliable traction and stable power supply are achieved during towing. This device not only ensures safety and stability during towing but also provides continuous and stable power support for the towed vehicle or external equipment, meeting diverse user needs during towing. The towing device with power supply capability can provide power to the towed vehicle or external equipment, greatly expanding its application scenarios. Through this power supply function, users can provide power to the towed equipment during towing without needing to carry a generator or find a power outlet, improving vehicle convenience and practicality.
[0057] Furthermore, the vehicle power supply, power input port 3, OBC vehicle charger 4, and power output element 5 are connected by a wired connection.
[0058] Furthermore, the power output element 5 can be configured as a power output port.
[0059] Furthermore, the power output element 5 can be configured as a socket box.
[0060] Furthermore, the OBC on-board charger 4 has built-in rectification, voltage regulation, and filtering circuits to convert the on-board power input at the power input port 3 into 220V power.
[0061] Furthermore, the power output element 5 is mounted on the outside of the trailer hook 2 via a fixed bracket.
[0062] Once the trailer hitch is connected to the tractor, the vehicle's power supply is connected to the trailer hitch via power input port 3. Then, after rectification, voltage regulation, and filtering by the OBC on-board charger 4, the on-board power supply is converted into a stable 220V power supply. Finally, external devices connect to the trailer hitch via power output component 5 to obtain the necessary power. The entire power supply process is stable and reliable, meeting the power needs of the towed equipment during towing.
[0063] By integrating mechanical connections and an electrical power supply system, reliable traction and stable power supply are achieved during towing. This device not only ensures safety and stability during towing but also provides continuous and stable power support for the towed vehicle or external equipment, meeting diverse user needs during towing. The towing device with power supply capability can provide power to the towed vehicle or external equipment, greatly expanding its application scenarios. Through this power supply function, users can provide power to the towed equipment during towing without needing to carry a generator or find a power outlet, improving vehicle convenience and practicality.
[0064] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A trailer device with power extraction function, characterized in that, include: A crossbeam (1) is connected to the car; Trailer hook (2), which is fixedly installed on crossbeam (1); The power input port (3) is fixedly installed on the crossbeam (1) and connected to the vehicle's on-board power supply; The OBC on-board charger (4) is fixedly installed on the crossbeam (1) and connected to the power input port (3); A power output element (5) is fixedly installed on the outside of the trailer hook (2), and the power output element (5) is connected to the OBC on-board charger (4); The vehicle's on-board power supply is converted into a stable current by the OBC on-board charger (4) through the power input port (3). External devices are connected through the power output element (5) to obtain a stable power supply, thereby increasing the vehicle's extended applications.
2. A trailer device with power extraction function according to claim 1, characterized in that, The crossbeam (1) is equipped with mounting bracket assemblies (6) at both ends, and the mounting bracket assemblies (6) on both sides are connected to the rear longitudinal beam assembly (7).
3. A trailer device with power extraction function according to claim 2, characterized in that, The mounting bracket assembly (6) is connected to the crossbeam (1) and the rear longitudinal beam assembly (7) of the vehicle body by bolts.
4. A trailer device with power extraction function according to claim 2, characterized in that, The crossbeam (1), trailer hook (2), mounting bracket assembly (6) and rear longitudinal beam assembly (7) are made of high-strength steel with a yield strength higher than 340MPa.
5. A trailer device with power extraction function according to claim 1, characterized in that, The vehicle power supply, power input port (3), OBC vehicle charger (4) and power output element (5) are connected by wires.
6. A trailer device with power extraction function according to claim 1, characterized in that, The power output element (5) can be configured as a power output port.
7. A trailer device with power extraction function according to claim 1, characterized in that, The power output element (5) can be configured as a socket box.
8. A trailer device with power extraction function according to claim 1, characterized in that, The OBC on-board charger (4) has built-in rectification, voltage regulation and filtering circuits, which are used to convert the on-board power input at the power input port (3) into 220V power.
9. A trailer device with power extraction function according to claim 1, characterized in that, The power output element (5) is mounted on the outside of the trailer hook (2) via a fixed bracket.
10. A trailer device with power extraction function according to claim 1, characterized in that, The trailer hook (2) is located at the end near the crossbeam (1) below the crossbeam (1).