Lightweight automobile frame longitudinal beam structure
By setting up a compressed air buffer structure between the collapsed cylinder and the inner cylinder of the automobile longitudinal beam, the problem of damage to the longitudinal beam structure during small collisions is solved, and the coordination of the collapsed cylinder and the energy-absorbing plate can be used to achieve better energy absorption effect, extend the service life and improve safety.
Patent Information
- Application Number
- CN202421737882.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-07-22
AI Technical Summary
In the event of a small collision, existing automobile longitudinal beams may force the collapse groove, causing them to deform, affecting the energy absorption effect, and increasing the cost of use.
A buffer structure that can compress air is arranged between the collapse cylinder and the inner cylinder. When the impact is small, the compressed air absorbs energy and avoids structural damage; when the impact is large, the collapse energy absorption effect is achieved by using the cooperation of the collapse cylinder and the energy absorption plate.
It effectively avoids structural damage during small collisions, extends service life, and achieves better collapse and energy absorption effect during large collisions, protecting the safety of the driving and passenger compartment.
Smart Images
Figure CN222769467U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile longitudinal beams, in particular to a lightweight automobile frame longitudinal beam structure. Background Art
[0002] The frame is the most important load-bearing component in a car, and the frame longitudinal beam is one of the key parts, so the longitudinal beam plays an important load-bearing role in the car. The side beam frame, center beam frame, etc. of the car all contain longitudinal beams. The longitudinal beams are usually stamped from low-alloy steel plates, and the cross-sectional shape is generally groove-shaped, and some are made into Z-shaped or box-shaped cross-sections. The car longitudinal beams include front longitudinal beams and rear longitudinal beams, which can also collapse and deform to absorb energy when the vehicle collides, reducing the energy transmitted to the cab and protecting the driver.
[0003] In order to achieve its buffering and energy absorption function, the longitudinal beam is a hollow lightweight structure, and a crush groove is also provided to facilitate deformation and energy absorption when subjected to force. However, when the car is subjected to a minor collision, a force may be applied to the crush groove, causing it to deform, affecting its energy absorption effect and requiring replacement, increasing the cost of use. Therefore, we propose a lightweight automobile frame longitudinal beam structure. Utility Model Content
[0004] The utility model aims to provide a lightweight automobile frame longitudinal beam structure. A buffer structure capable of compressing air is arranged between the crush tube and the inner tube. When the impact is small, energy is absorbed and buffered by means of compressed air, thereby avoiding structural damage and increasing the use cost. Only when the impact is large, the crush tube and the energy absorption plate are used in combination to achieve a better structural crush energy absorption effect, protect the safety of the driver's cabin, and solve the problems raised in the background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lightweight automobile frame longitudinal beam structure, comprising a crush tube and an inner tube, one end of the inner tube is inserted into the crush tube, a plurality of crush grooves are arranged around the outer ring of the crush tube, a welding plate is fixed to the end of the crush tube, and a mounting plate is fixed to the other end of the inner tube; a plurality of energy absorbing plates are evenly fixed on the surface of the welding plate inside the crush tube, a sealing tube is fixed to the end of the energy absorbing plate, a sealing ring is fixed around the outer ring of the sealing tube, the sealing tube can be slidably placed in the inner tube and the sealing ring is in contact with the inner surface of the inner tube, the space between the sealing tube and the inner tube is filled with air, and two cone rods facing the sealing tube are fixed to the inner surface of the mounting plate, and the outer surface of the cone rod outside the cone tip is a rough surface.
[0006] By adopting the above technical solution, the structure is installed at the front end or rear end of the car as a front longitudinal beam or a rear longitudinal beam by welding or connecting parts, and then the energy absorption box and the anti-collision beam are installed. When the impact is small, only compressed air is used to buffer the energy. When the impact is large, the puncture area of the sealing tube will be punctured, and then the collapse of the collapse tube and the energy absorption plate will be used to buffer the energy.
[0007] Optionally, a first through hole is opened on the surface of the welding plate, and the first through hole passes through four corners of the surface of the welding plate.
[0008] By adopting the above technical solution, in addition to being fixed to the vehicle frame by welding, the welding plate can also be installed and fixed by using a connecting piece that penetrates the first through-hole.
[0009] Optionally, a second through hole is formed on the surface of the mounting plate, and the second through hole passes through four corners of the surface of the mounting plate.
[0010] By adopting the above technical solution, the anti-collision beam and the energy absorption box can be connected and fixed to the mounting plate through the connecting piece passing through the second through hole.
[0011] Optionally, the surface of the energy absorbing plate is provided with through holes, and the through holes are evenly distributed on the surface of the energy absorbing plate.
[0012] By adopting the above technical solution, the through holes are provided to reduce the weight of the energy absorbing plate, and the energy absorbing plate can be deformed and collapsed to absorb energy.
[0013] Optionally, a low-thickness puncture area is provided on the surface of the sealing tube, and the puncture area is aligned with the cone rod.
[0014] By adopting the above technical solution, the cone rod can easily puncture the sealing tube in the puncture area to discharge the air.
[0015] Optionally, the inner ring of the inner cylinder is integrally provided with a limiting ring, and the limiting ring abuts against the surface of the sealing cylinder.
[0016] By adopting the above technical solution, the presence of the limiting ring can prevent the inner tube from being pulled out of the collapse tube as a whole.
[0017] Compared with the prior art, the technical solution of this application has the following beneficial effects:
[0018] 1. The technical solution of the present application is to provide a buffer structure that can compress air between the crush tube and the inner tube. When the impact is small, the compressed air is used to absorb energy and buffer, thereby avoiding structural damage and increasing the use cost. Only when the impact is large, the crush tube and the energy absorption plate will be used to achieve a better structural crush energy absorption effect and protect the safety of the driver and passenger compartment.
[0019] 2. The technical solution of the present application makes the conical rod have a certain length so that the inner tube is compressed into the collapse tube and punctures the sealing tube when there is still a certain distance, thereby avoiding the risk of the inner tube exploding due to excessive compression of air. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:
[0021] Figure 1 It is a schematic diagram of the overall structure of the lightweight automobile frame longitudinal beam structure of the utility model;
[0022] Figure 2 It is a schematic diagram of the internal structure of the lightweight automobile frame longitudinal beam structure of the utility model;
[0023] Figure 3 It is a schematic diagram of the detailed structure of the front end of the lightweight automobile frame longitudinal beam structure of the utility model.
[0024] In the figure: 1, collapse tube; 11, welding plate; 111, first through hole; 12, collapse groove; 2, inner tube; 21, mounting plate; 211, second through hole; 212, cone rod; 22, limit ring; 3, energy absorbing plate; 31, through hole; 4, sealing tube; 41, puncture area; 42, sealing ring. DETAILED DESCRIPTION
[0025] See also Figure 1-3 The utility model provides a technical solution: a lightweight automobile frame longitudinal beam structure, including a crush tube 1 and an inner tube 2, a welding plate 11 is fixed to the end of the crush tube 1, and it can be fixed to the surface of the frame by welding to achieve the fixation of the welding plate 11 and the crush tube 1, in addition, a first through hole 111 is opened on the surface of the welding plate 11, the first through hole 111 passes through the four corners of the surface of the welding plate 11, and a connecting piece can be used to pass through the first through hole 111 to fix the welding plate 11, so as to achieve the installation of the crush tube 1.
[0026] The front end of the crush cylinder 1 is an open structure, so that one end of the inner cylinder 2 is inserted into the crush cylinder 1. A mounting plate 21 is welded and fixed to the front end of the inner cylinder 2. A second through-hole 211 is opened on the surface of the mounting plate 21. The second through-hole 211 passes through the four corners of the surface of the mounting plate 21. The energy absorption box or the fixing plate of the anti-collision beam can be connected and fixed to the mounting plate 21 with the help of a connecting piece in combination with the second through-hole 211, so as to realize the installation of the energy absorption box and the anti-collision beam.
[0027] A plurality of energy absorbing plates 3 are evenly fixed on the surface of the welding plate 11 inside the crush tube 1, and the length of each energy absorbing plate 3 is the same. A sealing tube 4 is fixed at the end of the energy absorbing plate 3. A sealing ring 42 is fixed around the outer ring of the sealing tube 4, and the sealing tube 4 can be slidably placed in the inner tube 2, and the sealing ring 42 is in contact with the inner surface of the inner tube 2. The space between the sealing tube 4 and the inner tube 2 is filled with air. When subjected to a small impact force, the inner tube 2 will move toward the rear end, and the sealing tube 4 will slide toward the front end to compress the air, providing an energy absorption buffer. When the impact is small, the structure itself will not be damaged, so as to avoid the structure being broken and requiring replacement due to a small impact. A limiting ring 22 is provided on the inner ring of the inner tube 2 as a whole, and the limiting ring 22 contacts the surface of the sealing tube 4 to prevent the inner tube 2 from sliding out of the crush tube 1 as a whole toward the front end.
[0028] Two conical rods 212 facing the sealing tube 4 are fixed on the inner surface of the mounting plate 21. A low-thickness puncture area 41 is provided on the surface of the sealing tube 4. The puncture area 41 is aligned with the conical rod 212. When the impact force is large, the inner tube 2 moves a large distance toward the rear end until the conical rod 212 can use its tip to puncture the puncture area 41 of the sealing tube 4 and leak air. The outer surface of the conical rod 212 outside the cone tip is a rough surface, and the puncture position will not be tightly in contact with the outer ring surface of the conical rod 212, ensuring that the air can be discharged normally. Multiple circles of collapse grooves 12 are arranged around the outer ring of the collapse tube 1, and through holes 31 are opened on the surface of the energy absorbing plate 3. The through holes 31 are evenly distributed on the surface of the energy absorbing plate 3. Then the mounting plate 21 contacts the collapse tube 1 and the energy absorbing plate 3, so that the two can be deformed and absorb energy for buffering.
[0029] When in use, the crush tube 1 is welded and fixed on the vehicle frame by the welding plate 11, or the welding plate 11 and the crush tube 1 are installed by using the connecting piece in combination with the first through hole 111. The energy absorption box and the anti-collision beam are installed at the front end of the mounting plate 21 through the connecting piece and the second through hole 211. When subjected to a slight impact, the mounting plate 21 is pushed toward the crush tube 1, so that the sealing tube 4 slides toward the front end in the inner tube 2, compressing the air in the inner tube 2 to achieve the effect of energy absorption and buffering. A small collision will not damage the structure, and there is no need to replace it, thereby saving the cost of use. When the impact is large, the mounting plate 21 will be knocked forward too long a distance in the direction of the crush tube 1. After the air in the inner tube 2 is compressed and absorbs energy, the tip of the cone rod 212 will directly contact the puncture area 41 and puncture it, so that the air in the inner tube 2 is discharged. Then the sealing tube 4 contacts the inner surface of the mounting plate 21, and then the mounting plate 21 resists the crush tube 1 and the energy absorbing plate 3. The crush tube 1 is deformed at the position of the crush groove 12, and cooperates with the deformation of the energy absorbing plate 3 to absorb and buffer the impact force and play a protective role. At this time, the structure is damaged and needs to be replaced as a whole.
Claims
1. A lightweight automobile frame longitudinal beam structure, comprising a crush tube (1) and an inner tube (2), characterized in that: One end of the inner cylinder (2) is inserted into the crush cylinder (1), a plurality of circles of crush grooves (12) are arranged around the outer ring of the crush cylinder (1), a welding plate (11) is fixed to the end of the crush cylinder (1), and a mounting plate (21) is fixed to the other end of the inner cylinder (2); A plurality of energy absorbing plates (3) are evenly fixed on the surface of the welding plate (11) inside the collapse cylinder (1), a sealing tube (4) is fixed at the end of the energy absorbing plate (3), a sealing ring (42) is fixed around the outer ring of the sealing tube (4), the sealing tube (4) can be slidably placed in the inner cylinder (2) and the sealing ring (42) is in contact with the inner surface of the inner cylinder (2), the space between the sealing tube (4) and the inner cylinder (2) is filled with air, and two conical rods (212) facing the sealing tube (4) are fixed on the inner surface of the mounting plate (21), and the outer surface of the conical rod (212) outside the conical tip is a rough surface.
2. A lightweight automobile frame longitudinal beam structure according to claim 1, characterized in that: The surface of the welding plate (11) is provided with a first through hole (111), and the first through hole (111) passes through the four corners of the surface of the welding plate (11).
3. The lightweight automobile frame longitudinal beam structure according to claim 1, characterized in that: The surface of the mounting plate (21) is provided with a second through hole (211), and the second through hole (211) passes through four corners of the surface of the mounting plate (21).
4. The lightweight automobile frame longitudinal beam structure according to claim 1, characterized in that: The surface of the energy absorbing plate (3) is provided with through holes (31), and the through holes (31) are evenly distributed on the surface of the energy absorbing plate (3).
5. The lightweight automobile frame longitudinal beam structure according to claim 1, characterized in that: The surface of the sealing tube (4) is provided with a puncture area (41) of low thickness, and the puncture area (41) is aligned with the cone rod (212).
6. The lightweight automobile frame longitudinal beam structure according to claim 1, characterized in that: The inner ring of the inner cylinder (2) is integrally provided with a limiting ring (22), and the limiting ring (22) abuts against the surface of the sealing cylinder (4).