Automobile door anti-collision beam structure
By incorporating a conductive plate and spring steel into the anti-collision beam of the car door, the problem of fatigue damage to the anti-collision beam after multiple impacts is solved, achieving better impact force absorption and pressure relief, and improving the safety and service life of the car door.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-18
- Publication Date
- 2026-03-31
AI Technical Summary
Existing car door anti-collision beams are prone to fatigue damage after repeated impacts, and cannot effectively absorb and release impact forces, resulting in insufficient structural stability and service life.
A car door anti-collision beam structure was designed. It initially absorbs the impact force through a transmission plate and releases the pressure using internal spring steel, thereby enhancing the buffering capacity and stability of the anti-collision beam.
The impact resistance and service life of the anti-collision beam have been improved, the risk of door damage has been reduced, and the safety and structural stability of the door have been enhanced.
Smart Images

Figure CN224060825U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle door anti-collision beam technology, specifically a vehicle door anti-collision beam structure. Background Technology
[0002] A door impact beam, also known as a side door impact beam, is a horizontal beam (not visible from the outside) added to the internal structure of a car door. It is used to strengthen the structure of the side of the vehicle, improve its resistance to side impacts, enhance side safety, and transfer frontal impact forces.
[0003] Typically, during the installation and use of car door anti-collision beams, the main body of the anti-collision beam is installed obliquely to the inside of the car door. When the car door is impacted, the anti-collision beam reinforces the entire door and absorbs and transmits the pressure generated by the impact, reducing the damage caused by the impact. However, conventional anti-collision beams need to be fitted to the inside of the car door and fixed to the door by welding. When the car door is impacted, the anti-collision beam can only absorb the impact force with its rigidity. Moreover, the anti-collision beam is not subjected to pressure treatment, so the entire anti-collision beam has to bear the entire impact force. As a result, after repeated impacts, the anti-collision beam will suffer fatigue damage. Therefore, we propose a new structure for automotive door anti-collision beams. Utility Model Content
[0004] To address the shortcomings of existing automotive door anti-collision beam structures, this utility model provides an automotive door anti-collision beam structure that features a transmission plate that contacts the door. When the door is impacted, the impact force is initially absorbed by the transmission plate and then transmitted back to the interior of the anti-collision beam body. Simultaneously, spring steel installed inside the anti-collision beam body releases the pressure, ensuring its pressure relief effect. This solves the problems mentioned in the background art.
[0005] This utility model provides the following technical solution: a car door anti-collision beam structure, including a car door, a connecting plate is installed on the inner side of the car door by a first fastening bolt, an mounting sleeve is fixedly connected to the middle of the connecting plate, a connecting rod is movably sleeved inside the mounting sleeve, an anti-collision beam body is fixedly connected to the inner side of the connecting rod, and a second connecting sleeve is movably sleeved outside the anti-collision beam body.
[0006] Preferably, two sets of the mounting sleeves are installed, and the mounting sleeves are installed obliquely on the inside of the car door.
[0007] Preferably, a second fastening bolt is installed inside one end of the mounting sleeve, and the second fastening bolt passes through the mounting sleeve and is threaded into the inside of the connecting rod.
[0008] Preferably, a first connecting sleeve is installed between the mounting sleeve and the connecting rod, and the inner side of the first connecting sleeve has a hole that matches the shape of the connecting rod.
[0009] Preferably, the lower ends of the second connecting sleeve are fixedly connected to conductive plates, which are fitted onto the surface of the car door.
[0010] Preferably, spring steel is fixedly connected to the inner side of the two sets of anti-collision beam bodies, and the spring steel is S-shaped.
[0011] Compared with existing automotive door anti-collision beam structures, this utility model has the following advantages:
[0012] 1. The car door anti-collision beam structure uses a first fastening bolt to drive the connecting plate to be installed on the outside of the car door. At the same time, after the connecting rod is installed inside the mounting sleeve, a second fastening bolt is installed on both sides of the mounting sleeve according to the different distances between the mounting sleeve and the anti-collision beam body. The second fastening bolt drives the connecting rod to maintain stability when splicing inside the mounting sleeve, thereby improving the stability of the anti-collision beam during installation.
[0013] 2. The car door anti-collision beam structure has a second connecting sleeve installed on the outside of the anti-collision beam body. The second connecting sleeve drives the transmission plate to contact the car door. When the car door is impacted, the second connecting sleeve absorbs the impact force and transmits it to the interior of the anti-collision beam body. At the same time, spring steel is installed inside the anti-collision beam body. The elasticity of the spring steel can release the impact force, ensuring the anti-collision effect and capability of the equipment, and improving the service life of the anti-collision beam. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the main structure of the present utility model;
[0015] Figure 2 This is a partially enlarged structural diagram of the anti-collision beam of this utility model;
[0016] Figure 3 This is a cross-sectional view of the anti-collision beam of this utility model;
[0017] Figure 4 This is a partial cross-sectional view of the anti-collision beam of this utility model;
[0018] Figure 5 This is an enlarged structural diagram of point A in this utility model.
[0019] In the diagram: 1. Door; 2. Connecting plate; 3. First fastening bolt; 4. Mounting sleeve; 5. First connecting sleeve; 6. Connecting rod; 7. Second fastening bolt; 8. Anti-collision beam body; 9. Second connecting sleeve; 10. Conducting plate; 11. Spring steel. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A car door anti-collision beam structure includes a car door 1. A connecting plate 2 is installed on the inner side of the car door 1 via a first fastening bolt 3. The connecting plate 2 is installed inside the first fastening bolt 3 and limits the position of the first fastening bolt 3 outside the car door 1. An mounting sleeve 4 is fixedly connected to the middle of the connecting plate 2. A connecting rod 6 is movably sleeved inside the mounting sleeve 4. Adjusting the position of the connecting rod 6 allows it to fit inside the mounting sleeve 4, improving the stability of the connecting rod 6 when its position is limited inside the mounting sleeve 4. An anti-collision beam body 8 is fixedly connected to the inner side of the connecting rod 6. A second connecting sleeve 9 is movably sleeved outside the anti-collision beam body 8. Adjusting the position of the second connecting sleeve 9 allows the second connecting sleeve 9 to transmit the impact force to the interior of the anti-collision beam body 8 when the car door 1 is impacted. The anti-collision beam body 8 then supports the device and buffers the impact force.
[0022] Please see Figure 1 There are two sets of mounting sleeves 4. The mounting sleeves 4 are installed diagonally on the inside of the door 1. By installing the mounting sleeves 4 on the inside of the door 1 and installing them diagonally, the stability of the anti-collision beam can be improved during the installation process.
[0023] Please see Figure 5 The second fastening bolt 7 is installed inside one end of the mounting sleeve 4. The second fastening bolt 7 passes through the mounting sleeve 4 and is threaded into the inside of the connecting rod 6. After the connecting rod 6 is installed inside the mounting sleeve 4, the second fastening bolt 7 is installed inside the mounting sleeve 4. The second fastening bolt 7 passes through the mounting sleeve 4 and is threaded into the inside of the connecting rod 6, ensuring that the second fastening bolt 7 maintains stability when the position of the connecting rod 6 is limited.
[0024] Please see Figure 5A first connecting sleeve 5 is installed between the mounting sleeve 4 and the connecting rod 6. The inner side of the first connecting sleeve 5 has a hole that matches the shape of the connecting rod 6. By fitting the first connecting sleeve 5 inside the mounting sleeve 4 and controlling the extension of the connecting rod 6 into the inside of the first connecting sleeve 5 according to the length and shape of the connecting rod 6, the position of the connecting rod 6 inside the first connecting sleeve 5 can be adjusted by telescoping, thereby improving the stability of the equipment during installation and disassembly, and also improving the stability of the connection at the end of the first connecting sleeve 5.
[0025] Please see Figure 4 The lower ends of the second connecting sleeve 9 are fixedly connected to the conduction plates 10. The conduction plates 10 are fitted to the surface of the car door 1. By fixing the conduction plates 10 to the lower ends of the second connecting sleeve 9, the position of the second connecting sleeve 9 can be adjusted to control the contact position between the second connecting sleeve 9 and the outside of the car door 1. The conduction plates 10 are installed at the lower end of the second connecting sleeve 9 and are fitted to the outside of the car door 1. At the same time, when the car door 1 is impacted, the conduction plates 10 buffer the impact. By using a multi-point contact method for fixation, it avoids direct pressure on the anti-collision beam body 8 when there is a small impact on the outside of the car door 1, which would cause damage to the entire anti-collision beam body 8.
[0026] Please see Figure 4 Spring steel 11 is fixedly connected to the inner side of the two sets of anti-collision beam bodies 8. The spring steel 11 is S-shaped. By fixing the spring steel 11 to the inner side of the anti-collision beam body 8 and installing the spring steel 11 between the two sets of anti-collision beam bodies 8, when the equipment is impacted, the spring steel 11 elastically releases the force generated by the impact, thereby improving its support effect and reducing the damage to the entire door 1 caused by the impact.
[0027] Working principle: During use, a first fastening bolt 3 is installed on the inside of the car door 1. The first fastening bolt 3 is fixed by the connecting plate 2. At the same time, depending on the shape of the connecting rod 6, the first connecting sleeve 5 is controlled to fit inside the mounting sleeve 4, driving the connecting rod 6 to move into the inside of the first connecting sleeve 5. Second fastening bolts 7 are installed inside both sides of the mounting sleeve 4. The second fastening bolts 7 drive the connecting rod 6 to limit its position inside the mounting sleeve 4, ensuring that the connecting rod 6 maintains stability when positioned. At the same time, the position of the second connecting sleeve 9 outside the anti-collision beam body 8 is adjusted, controlling the transmission plate 10 to contact the inside of the car door 1. When the car door 1 is impacted, the transmission plate 10 is subjected to pressure and applies pressure to the anti-collision beam body 8. Through the transmission of force, pressure treatment can be performed.
[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A structure of a car door beam for preventing a collision, comprising a door (1), characterized in that: The inner side of the door (1) is provided with a connecting plate (2) through a first fastening bolt (3), the middle part of the connecting plate (2) is fixedly connected with a mounting sleeve (4), the inner side of the connecting plate (2) is movably sleeved with a connecting rod (6), the inner side of the connecting rod (6) is fixedly connected with a crash beam body (8), and the outer side of the crash beam body (8) is movably sleeved with a second connecting sleeve (9).
2. The automobile door beam structure according to claim 1, characterized by: Two groups of mounting sleeves (4) are arranged, and the mounting sleeves (4) are obliquely arranged on the inner side of the door (1).
3. The automobile door beam structure according to claim 1, characterized by: The inner side of one end of the mounting sleeve (4) is provided with a second fastening bolt (7), the second fastening bolt (7) penetrates through the mounting sleeve (4) and is threadedly sleeved in the inner side of the connecting rod (6).
4. The automobile door beam structure according to claim 1, characterized by: A first connecting sleeve (5) is arranged between the mounting sleeve (4) and the connecting rod (6), and the inner side of the first connecting sleeve (5) is provided with a hole matched with the shape of the connecting rod (6).
5. The automobile door beam structure according to claim 1, wherein: The lower part of the second connecting sleeve (9) is fixedly connected with a conductive plate (10), and the conductive plate (10) is attached to the surface of the door (1).
6. The automobile door beam structure according to claim 1, wherein: The inner side of the two groups of crash beam bodies (8) is fixedly connected with spring steels (11), and the spring steels (11) are in S shape.