Front-drive auxiliary frame with crumple energy absorption box
Through the innovative design of the frame-type main frame and aluminum alloy energy-absorbing box, combined with high-strength steel and gradient longitudinal beams, the problems of low energy absorption efficiency and high maintenance costs of traditional subframes have been solved, achieving efficient energy absorption and improved economy.
Patent Information
- Application Number
- CN202520471981.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-18
AI Technical Summary
Traditional front-wheel drive subframes have low energy absorption efficiency in frontal collisions, large passenger compartment intrusion, complex structure, and high maintenance costs, making it difficult to balance strength, energy absorption performance, and economy.
It adopts a frame-type main frame, a detachable aluminum alloy energy-absorbing box and high-strength steel, combined with a gradient longitudinal beam design and fracture-resistant bolts, and achieves efficient energy absorption and optimized material configuration through laser welding and precision casting processes.
It significantly improves collision safety and repair economy while ensuring vehicle handling stability, and is suitable for both new energy and traditional fuel vehicle platforms.
Smart Images
Figure CN223919395U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of automobile manufacturing, specifically is a kind of subframe structure for front drive vehicle, the structural design of collapse energy-absorbing box that improves vehicle crash safety and light weight performance. BACKGROUND
[0002] Traditional front drive subframe usually adopts steel integrated structure, although it can meet the demand of general load bearing, but in frontal collision accident, energy absorption efficiency is lower, it is easy to cause passenger compartment intrusion too much, and maintenance cost is higher.In the prior art, part of subframe improves safety by increasing energy-absorbing box or material optimization, but there are problems such as complex structure, insufficient light weight, etc.Therefore, a subframe structure considering strength, energy-absorbing performance and economy is urgently needed. SUMMARY
[0003] The utility model provides a frame type subframe with four points screwing on vehicle body, by optimizing structure design and material configuration, high-efficiency energy absorption is realized, while the vehicle handling stability and maintenance convenience are ensured.The specific technical scheme is as follows:
[0004] A front drive subframe with collapse energy-absorbing box, comprising a frame type main frame, a front end detachable aluminum alloy energy-absorbing box, a middle section longitudinal beam with gradually changing cross-sectional area, a screwing vehicle body interface, a two-point type steering machine mounting point and a three-point type motor suspension point; the aluminum alloy energy-absorbing box is arranged on both sides of the front end of the main frame, and four screwing vehicle body interfaces are arranged on the upper part of the frame type main frame; the two-point type steering machine mounting point is arranged at the front end of the middle section longitudinal beam with gradually changing cross-sectional area, and the three-point type motor suspension point is arranged on the front cross beam and the rear cross beam of the frame type main frame, wherein the front cross beam is provided with one, and the rear cross beam is provided with two.
[0005] Further, the aluminum alloy energy-absorbing box is connected with the main frame by bolts, and a honeycomb collapse structure is arranged inside.
[0006] Further, the middle section of the middle section longitudinal beam with gradually changing cross-sectional area is reduced by 30%-50% compared with both ends, to form a preset collapse area.
[0007] Further, swing arm mounting points are arranged on both sides of the frame type main frame, two on each side, the swing arm mounting points adopt box-shaped reinforcing structure, and the connection stiffness is ensured by nut limiting.
[0008] Further, the subframe main body is made of high-strength steel stamping plate material with yield strength ≥600MPa, and the aluminum alloy energy-absorbing box is made of 250MPa aluminum alloy extrusion forming.
[0009] Further, the connecting bolts are designed in high-strength breakable type, and are broken in preset order to guide the energy transmission path during collision.
[0010] The utility model discloses main body frame passes through laser welding and hot stamping, ensure structural accuracy and strength, and energy absorption box adopts precision casting process, and the internal honeycomb structure is integrally formed through die forging technology, the utility model discloses through the innovative structure design and material optimization, guarantee the vehicle control performance simultaneously, the collision safety and maintenance economy are improved significantly, be applicable to new energy vehicle and traditional fuel car platform, have extensive application prospect. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 The utility model discloses structure schematic view;
[0012] Figure 2 The utility model discloses plan view;
[0013] Figure 3 The utility model discloses bottom view;
[0014] Figure 4 The utility model discloses side view.
[0015] Reference signs:
[0016] 1-aluminium alloy energy absorption box, 2-screwed car body interface, 3-two point type steering machine mounting point, 4-front swing arm mounting point, 5-rear swing arm mounting point, 6-middle longitudinal beam, 7-three point type motor suspension point. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the utility model.
[0018] As Figures 1-4 shown, a front-drive auxiliary frame with collapse energy absorption box, including frame main body frame, front detachable aluminium alloy energy absorption box 1, the middle longitudinal beam 6 of gradually changing cross section, the screwed car body interface 2, two point type steering machine mounting point 3 and three point type motor suspension point 7, aluminium alloy energy absorption box 1 is arranged at the both sides of main body frame front end, and the frame main body frame upper portion is provided with four screwed car body interfaces 2 around;Two point type steering machine mounting point 3 is arranged at the front end of the middle longitudinal beam 6 of gradually changing cross section respectively, and the three point type motor suspension point 7 is arranged on the front crossbeam and rear crossbeam of frame main body frame, and the front crossbeam is provided with 1, and the rear crossbeam is provided with 2.
[0019] The aluminum alloy energy absorption box is connected with the main frame by bolts, and a honeycomb collapse structure is arranged inside. The middle section area of the middle longitudinal beam with gradually changing section area is reduced by 30%-50% than both ends, forming a preset collapse area. Box-shaped reinforcing structures are arranged on both sides of the frame-shaped main frame as swing arm mounting points, two on each side, and the swing arm mounting points adopt box-shaped reinforcing structures, and the connection stiffness is ensured by limiting with nuts.
[0020] The main body of the subframe is made of high-strength steel stamping plate with a yield strength of ≥600 MPa, and the aluminum alloy energy absorption box is made of 250 MPa aluminum alloy extrusion. The connecting bolts are designed to be high-strength and breakable, and they break in a preset order during a collision to guide the energy transmission path.
[0021] The test verification of the embodiment is carried out, the energy absorption effect is verified by trolley collision test (56 km / h full-width frontal collision), and the maximum deceleration is controlled within 30g. Finite element simulation analysis shows that the stress distribution is uniform, and the fatigue life meets the requirement of 1 million cycle loads.
[0022] The preferred embodiments of the patent are described in detail above, but the patent is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the patent.
Claims
1. A precursor subframe with a crush can, characterized by: It comprises a frame body frame, a front detachable aluminum alloy energy absorption box, a middle section beam with gradually changing cross section, a screw connection vehicle body interface, a two-point steering machine mounting point and a three-point motor suspension point; the aluminum alloy energy absorption box is arranged on both sides of the front end of the frame body frame, four screw connection vehicle body interfaces are arranged around the upper part of the frame body frame; the two-point steering machine mounting point is arranged at the front end of the middle section beam with gradually changing cross section, and the three-point motor suspension point is arranged on the front cross beam and the rear cross beam of the frame body frame, one front cross beam and two rear cross beams are arranged.
2. The front subframe of claim 1, wherein: The aluminum alloy energy absorption box is connected with the frame body through bolts, and a honeycomb collapse structure is arranged inside.
3. The front subframe of claim 1, wherein: The middle section of the middle section beam with gradually changing cross section is reduced by 30%-50% compared with both ends, forming a preset collapse area.
4. The front subframe of claim 1, wherein: Swing arm mounting points are arranged on both sides of the frame body frame, two on each side, the swing arm mounting points adopt a box-shaped reinforcing structure, and the connection stiffness is ensured through nut limiting.
5. The front subframe of claim 1, wherein: The main body of the subframe is made of high-strength steel stamping plate with yield strength ≥600MPa, and the aluminum alloy energy absorption box is made of 250MPa aluminum alloy extrusion.
6. The front subframe of claim 1, wherein: The connecting bolts are designed to be high-strength and breakable, and break in a preset order during the collision to guide the energy transmission path.