Vehicle underbody structure
By incorporating downward-sloping hollow tubular components in the vehicle's substructure, the problems of impact protection and bracket fracture rotation suppression during motor suspension installation were solved, thus achieving stable support and protection for the motor.
Patent Information
- Application Number
- CN202522733311.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-24
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-24
AI Technical Summary
When the existing vehicle's lower structure is installed using a motor suspension method, it is easily affected by impacts from the road surface in front. If the bracket breaks, the motor will rotate and sag, causing the high-voltage cable to break. Furthermore, the reinforcement components will affect the ground clearance, making it difficult to simultaneously achieve both protection and rotation suppression functions.
A tubular component is installed in front of the motor. It is designed as a hollow tube and tilts downwards. It is connected to the frame through a suspension bracket to absorb impact energy and transfer input force, thereby suppressing motor rotation and high-voltage line stretching.
Without reducing ground clearance, it effectively protects the motor from impacts from the road surface in front, suppresses motor rotation and high-voltage line tension, and improves motor support stability.
Smart Images
Figure CN224929085U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a vehicle substructure. Background Technology
[0002] To improve weight reduction and layout flexibility, motors used for vehicle propulsion are often suspended and mounted under the vehicle frame. With this structure, it's difficult to place other components under the motor, so the motor is easily subjected to direct impact when the vehicle encounters road protrusions or obstacles from the front.
[0003] Furthermore, when the bracket used to support the motor breaks, the motor will rotate and sag around the rear fulcrum, causing the high-voltage cable connected to the motor to be stretched violently and may break.
[0004] Although reinforcements or protective components can be installed at the bottom of the motor, this will reduce the vehicle's minimum ground clearance, thereby affecting driving performance and the flexibility of vehicle design.
[0005] Therefore, there is an urgent need for a vehicle underbody structure that can simultaneously protect against road surface interference and suppress motor detachment and rotation without affecting ground clearance. Utility Model Content
[0006] The purpose of this utility model is to provide a vehicle underbody structure that improves the protection performance against road surface input in front of the motor without reducing ground clearance, and effectively suppresses excessive motor rotation when the motor support is damaged.
[0007] The first technical solution is a vehicle substructure, comprising: The vehicle frame, which forms the vehicle's skeleton, The motor is located below the frame and is suspended and supported by it, and A tubular component located in front of the motor, overlapping the motor when viewed from above, and fixed to the frame; The tubular component is a hollow tube extending along the width direction of the vehicle, and has a structure in which the bottom surface of the cross section gradually slopes downward from the front of the vehicle to the rear of the vehicle. Attached Figure Description
[0008] Figure 1 This is a side view of the vehicle's lower structure, showing the motor supported by the frame.
[0009] Figure 2 This is a side view of the vehicle's lower structure, showing the motor detached from the frame. Detailed Implementation
[0010] The vehicle's lower structure includes: a frame 10 that forms the vehicle's skeleton, a motor 12 disposed below the frame 10, multiple brackets for supporting the motor 12 on the frame 10, a tubular member 20 disposed below and in front of the motor 12, and a tubular member bracket 18 for fixing the tubular member 20 to the frame 10.
[0011] The frame 10 is a structural component that extends along the front-to-back direction of the vehicle, forming the vehicle's skeleton.
[0012] A first bracket 14, a second bracket 15, and a tubular component bracket 18 are fixed on the frame 10.
[0013] The tubular component support 18 is positioned further forward than the first support 14 and the second support 15.
[0014] Motor 12 is an electric motor used for vehicle propulsion and is located below the frame 10.
[0015] The motor 12 is suspended from the frame 10 via the first bracket 14.
[0016] The first bracket 14 extends downward from the frame 10, and its lower end is connected and fixed to the upper end of the motor 12.
[0017] A third bracket 16 is provided at the rear end of the motor 12.
[0018] The third bracket 16 and the second bracket 15 are rotatably connected.
[0019] The second bracket 15 is fixed to the frame 10 and extends downward from the frame 10.
[0020] The connection between the second bracket 15 and the third bracket 16 is centered on the vehicle width direction, allowing the rear end of the motor to rotate around this axis.
[0021] The front of the motor 12 is connected to a high-voltage wiring 13.
[0022] The high-voltage wiring 13 extends upward from the motor 12 and is laid inside or outside the motor in a bent or folded manner.
[0023] Therefore, even if the motor 12 is displaced, the bent portion of the wiring 13 can straighten out to maintain the connection.
[0024] The tubular component 20 is located below the front end of the motor 12.
[0025] The tubular component 20 coincides with the front end of the motor 12 in the vertical direction.
[0026] It is connected to the frame 10 via a tubular support 18, rather than being directly connected to the motor 12.
[0027] The tubular member 20 is hollow and extends along the width of the vehicle.
[0028] The tubular member 20 comprises a first part 21 and a second part 22.
[0029] The first part 21 is a plate-shaped component with a flat portion extending along the lower surface of the support 18.
[0030] The flat part is provided with a bolt 23 through which it is fixed to the bracket 18.
[0031] The first part 21 generally includes a front end that bends downward from the front end of the flat portion and a rear end that extends downward from the rear end.
[0032] The second part 22 is also a plate-shaped component, which is connected to the front and rear ends of the first part 21.
[0033] The second part 22 as a whole includes a rear plate extending in a vertical direction, a horizontal plate extending forward at its lower end, an inclined plate extending upward at its front end, and a front plate extending upward at its front end.
[0034] Therefore, at least a portion of the bottom surface of the cross-section of the tubular member 20 has a shape that slopes downward from the front of the vehicle to the rear of the vehicle.
[0035] In this state, the tubular member 20 is located in front of and below the motor 12. When a road impact input occurs from the front, the tubular member 20 takes priority over the motor 12 to bear the input.
[0036] Next, refer to Figure 2 This describes the situation of the vehicle's lower structure under abnormal conditions according to this embodiment.
[0037] When the first bracket 14 breaks, the front end of the motor 12 will lose support from the frame 10 and move downward.
[0038] At this time, the motor 12 rotates around its rear part, with the connection between the third bracket 16 and the second bracket 15 as the center of rotation, causing the front end to rotate downward.
[0039] The front end of the motor 12 will collide with the tubular member 20 when it moves downward.
[0040] Upon impact, the hollow tubular member 20 deforms, thereby absorbing the impact energy.
[0041] This reduces the input energy acting on the motor 12, thereby suppressing damage to the motor 12.
[0042] Furthermore, since the bottom surface of the tubular member 20 is at least partially sloping downwards from the front of the vehicle to the rear, input from the front can slide along the sloping bottom surface and be transferred to the rear.
[0043] Therefore, it is possible to suppress excessive rotation of the motor 12 and reduce the severe tensile force acting on the high-voltage wiring 13.
[0044] In summary, according to the vehicle lower structure of this embodiment, in the structure in which the motor 12 is supported on the frame 10 by suspension, there is no need to configure a component at the bottom of the motor 12. The tubular component 20 located at the front and lower part of the motor 12 can simultaneously achieve the functions of protection against impact from the road surface and rotation suppression when the support breaks.
[0045] All documents, patent applications and technical standards described in this specification are considered to be incorporated herein by reference and are equivalent to being explicitly described in this specification.
Claims
1. A vehicle substructure, characterized in that, include: The vehicle frame, which forms the vehicle's skeleton, The motor is located below the vehicle frame and is supported by the vehicle frame via suspension. A tubular component located in front of the motor, overlapping the motor when viewed from above, and fixed to the vehicle frame; The tubular member has a central axis extending along the width direction of the vehicle and is formed as a hollow tube. Furthermore, the bottom surface of the cross-section of the tubular member extends downwards at least partially from the front of the vehicle to the rear of the vehicle.