Limiting structure and vehicle with same

Abstract

The utility model relates to the technical field of vehicle parts, and provides a limiting structure and a vehicle with the same. The limiting structure comprises a limiting support connected with a vehicle body. The limiting support is located on the side, facing the interior of the automobile, of the safety belt pre-tightening end piece assembly, and a limiting part is arranged on the limiting support. At least part of the safety belt pre-tightening end piece assembly is surrounded by the limiting part, and the limiting part can limit displacement of the safety belt pre-tightening end piece assembly relative to a vehicle body when the vehicle collides. According to the limiting structure, the displacement of the safety belt pre-tightening end piece assembly relative to the vehicle body can be limited when the vehicle is collided, so that the failure of a restraint system of the whole safety belt is avoided, and the effect of protecting the safety of passengers in the vehicle and the safety quality of the whole vehicle can be improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle component technology, and in particular to a limiting structure. It also relates to a vehicle equipped with the limiting structure. Background Technology

[0002] The seatbelt pretensioner assembly is a crucial component of the seatbelt pretensioning system. It typically includes a seatbelt lever, pretensioner seat, gas generator, cylinder, and mounting bracket. The seatbelt pretensioner assembly is bolted to the vehicle floor. In the event of a collision, the gas generator receives an electrical signal and activates, tightening the seatbelt lever. The lever then moves the seatbelt, restraining the occupants and eliminating any slack between the seatbelt and the occupant. This secures the occupant to their seat, reducing the risk of forward impact to the steering wheel, dashboard, and other components, thus minimizing collision injuries.

[0003] However, in the prior art, when the screw connection of the mounting bracket in the seat belt pretensioner assembly is located inside the seat belt tie rod, an inward overturning torque will be generated. If the vehicle collision energy is too large, it will cause the mounting bracket to deform, causing the seat belt pretensioner assembly to shift, thereby causing the entire seat belt restraint system to fail and failing to achieve the ideal occupant protection effect. Utility Model Content

[0004] In view of this, the present invention aims to propose a limiting structure that is beneficial to improving the protection of occupants inside the vehicle.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A limiting structure for limiting the displacement of a seatbelt pretensioner assembly in a vehicle body, the limiting structure including a limiting bracket connected to the vehicle body;

[0007] The end of the limiting bracket connected to the vehicle body is located on the side of the seat belt pretensioner assembly facing the inside of the vehicle, and the limiting bracket is provided with a limiting part.

[0008] At least a portion of the seatbelt pretensioner assembly is surrounded by the limiting portion, and the limiting portion is capable of limiting the displacement of the seatbelt pretensioner assembly relative to the vehicle body during a vehicle collision.

[0009] Furthermore, the limiting bracket includes a first connecting plate and a second connecting plate connected together; both the first connecting plate and the second connecting plate are arranged along the vertical direction of the vehicle, the first connecting plate is connected to the vehicle body, and the limiting part is disposed on the second connecting plate.

[0010] Furthermore, the front side of the second connecting plate is connected to the first connecting plate, the rear side of the second connecting plate is connected to the limiting part, and the limiting part is located at the middle of the seat belt pretensioning end piece assembly along the front-rear direction of the vehicle.

[0011] Furthermore, from the bottom to the top of the second connecting plate, the second connecting plate is gradually tilted towards the inside of the vehicle.

[0012] Furthermore, the top of the first connecting plate is provided with a first flange, and the top of the second connecting plate is provided with a second flange, and the first flange and the second flange overlap together along the vertical direction of the whole vehicle.

[0013] Furthermore, the limiting bracket includes a third connecting plate disposed between the first connecting plate and the second connecting plate, the third connecting plate being located at the bottom of the first connecting plate and the second connecting plate.

[0014] Furthermore, the second connecting plate is provided with a reinforcing rib, one end of which extends to the first connecting plate and the other end of which extends at least to the limiting portion; and / or, the bottom of the second connecting plate is provided with a third flange, which is located at the middle of the second connecting plate along the front-rear direction of the vehicle.

[0015] Furthermore, the seat belt pretensioner assembly includes a cylinder, and at least the area above the middle of the cylinder is surrounded by the limiting part along the vertical direction of the vehicle; the limiting part is U-shaped, and / or there is a gap s between the limiting part and the cylinder.

[0016] Furthermore, it also includes fasteners; the limiting bracket is connected to the vehicle body via a plurality of the fasteners.

[0017] Compared with the prior art, this utility model has the following advantages:

[0018] The limiting structure described in this utility model, by setting a limiting bracket connected to the vehicle body, and at least a portion of the seat belt pretensioner assembly being surrounded by a limiting part on the limiting bracket, can limit the displacement of the seat belt pretensioner assembly relative to the vehicle body during a vehicle collision, thereby limiting the amount of displacement of the seat belt pretensioner assembly, preventing the failure of the overall seat belt restraint system, and thus improving the protection effect for the safety of the occupants, thereby improving the overall vehicle safety.

[0019] Furthermore, the limiting bracket includes a first connecting plate and a second connecting plate arranged along the vertical direction of the vehicle. The first connecting plate is connected to the vehicle body, and the limiting part is located on the second connecting plate. This facilitates the arrangement and installation of the limiting bracket in the vehicle body and reduces space occupation. The limiting part is located in the middle of the seat belt pretensioner assembly along the longitudinal direction of the vehicle. This not only avoids the problem that the size of the limiting bracket needs to be larger when the limiting part is closer to the rear of the seat belt pretensioner assembly, which is not conducive to improving the structural stability of the limiting bracket and is also prone to resonance and abnormal noise during driving, but also avoids the problem that the limiting force required by the limiting bracket needs to be larger when the limiting part is closer to the front of the pretensioner generator, which places excessively high requirements on the overall structural performance of the limiting bracket and is difficult to design and develop.

[0020] Secondly, from bottom to top, the second connecting plate gradually tilts towards the inward side of the vehicle. This allows the arrangement of the second connecting plate to be close to the displacement direction of the seat belt pretensioner assembly. Compared to a vertical arrangement, this avoids the second connecting plate generating a flipping moment, minimizing the deformation of the limiting bracket and thus limiting the displacement of the seat belt pretensioner assembly. By setting a first flange and a second flange, and having the first flange and the second flange overlap along the vertical direction of the vehicle, a self-welding-like structure is formed, improving the support effect between the first connecting plate and the second connecting plate and enhancing the overall deformation resistance of the limiting bracket.

[0021] Furthermore, the inclusion of a third connecting plate reduces tensile deformation at the connection point between the first and second connecting plates, thereby improving the overall structural performance of the limiting bracket. By incorporating reinforcing ribs, with one end extending to the first connecting plate and the other end extending at least to the limiting portion, the deformation resistance at the connection point between the connecting plates is enhanced, reducing the risk of pull-out failure of the limiting bracket. The inclusion of a third flange, located in the center of the second connecting plate along the vehicle's longitudinal direction, improves the second connecting plate's resistance to torsional deformation, reducing the risk of deformation in the central area of ​​the second connecting plate, thus contributing to the overall performance improvement of the limiting bracket.

[0022] Furthermore, at least the area above the middle of the cylinder is surrounded by a limiting part, which is U-shaped. This arrangement facilitates the enclosure of at least a portion of the seatbelt pretensioner assembly. When the seatbelt pretensioner assembly displaces, it can be hooked, thus limiting its displacement along the vehicle's top and left-right directions. Simultaneously, a gap 's' between the limiting part and the cylinder ensures a reasonable safe distance between the seatbelt pretensioner assembly and the limiting bracket during assembly, reducing the risk of scratching the workpiece. The limiting bracket is connected to the vehicle body via multiple fasteners. This not only ensures the connection strength between the limiting bracket and the vehicle body but also prevents the limiting bracket from rotating relative to the vehicle body around a single fastener, which could lead to a failure in limiting the seatbelt pretensioner assembly.

[0023] Another objective of this invention is to provide a vehicle in which a seatbelt pretensioner end piece assembly and the limiting structure described above are provided.

[0024] The vehicle described in this utility model is equipped with the aforementioned limiting structure, which can limit the displacement of the seat belt pretensioner assembly relative to the vehicle body during a vehicle collision, preventing the failure of the entire seat belt restraint system, thereby protecting the safety of the occupants and improving the overall safety quality of the vehicle. Attached Figure Description

[0025] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0026] Figure 1 This is a schematic diagram of the overall structure of the limiting structure described in the embodiment of this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the seat belt pretensioning end piece assembly according to an embodiment of the present utility model;

[0028] Figure 3 This is a schematic diagram of the assembly of the limiting bracket and the seat belt pretensioning end piece according to an embodiment of the present utility model.

[0029] Figure 4 This is a schematic diagram of the structure of the limiting bracket described in an embodiment of the present utility model.

[0030] Figure 5 and Figure 6 for Figure 4 Other structural diagrams of the structure shown;

[0031] Figure 7This is a schematic diagram of the gap s described in an embodiment of the present invention;

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Seat belt pretensioner end piece assembly; 11. Mounting bracket; 12. Pretensioner seat; 13. Gas generator; 14. Cylinder; 15. Seat belt pull rod;

[0034] 2. Limiting bracket; 21. First connecting plate; 211. Connecting hole; 212. First flange; 213. Notch; 22. Second connecting plate; 221. Limiting part; 222. Second flange; 223. Third flange; 224. Reinforcing rib; 23. Third connecting plate;

[0035] 3. Fasteners; 4. Seat crossbeams; 5. Vehicle side panels. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0037] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0038] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Taking the vehicle in which the limiting bracket described in this utility model is located as an example, the directional terms used in the embodiments, such as "up," "down," "left," "right," "front," and "rear," are defined based on the vehicle's vertical direction (also known as the height direction, or the Z-direction of the entire vehicle), horizontal direction (also known as the width direction, or the Y-direction of the entire vehicle), and front-back direction (also known as the length direction, or the X-direction of the entire vehicle). "Inner" and "outer" are defined based on the outline of the corresponding component. For example, "inner" and "outer" are defined based on the vehicle's outline, with the side of the vehicle outline closer to the middle of the vehicle being "inner," and the opposite being "outer."

[0040] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0041] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] Example 1

[0043] This embodiment relates to a limiting structure for limiting the displacement of the seat belt pretensioner assembly 1 in the vehicle body. It can solve the problem in the prior art that when the vehicle collision energy is too large, the mounting bracket 11 in the seat belt pretensioner assembly 1 will deform, causing the seat belt pretensioner assembly 1 to displace, thereby causing the overall restraint system of the seat belt to fail. This can help achieve the ideal occupant protection effect.

[0044] In terms of overall structure, such as Figures 1 to 7 As shown, the limiting structure in this embodiment includes a limiting bracket 2 connected to the vehicle body. One end of the limiting bracket 2 connected to the vehicle body is located on the side of the seatbelt pretensioner assembly 1 facing inwards, and a limiting portion 221 is provided on the limiting bracket 2. Furthermore, at least a portion of the seatbelt pretensioner assembly 1 is surrounded by the limiting portion 221, and the limiting portion 221 can limit the displacement of the seatbelt pretensioner assembly 1 relative to the vehicle body during a vehicle collision.

[0045] At this time, with the above configuration, by setting a limiting bracket 2 connected to the vehicle body, and at least a portion of the seat belt pretensioner assembly 1 being surrounded by the limiting portion 221 on the limiting bracket 2, the displacement of the seat belt pretensioner assembly 1 relative to the vehicle body can be limited during a vehicle collision, thereby limiting the amount of displacement of the seat belt pretensioner assembly 1 and preventing the failure of the entire seat belt restraint system. This helps to improve the protection effect for the safety of the occupants and the overall vehicle safety performance.

[0046] Based on the above overview, in detail, in this embodiment, during specific implementation, participants Figure 2 As shown, the seat belt pretensioner end piece assembly 1 is an important component of the seat belt pretensioning device. The seat belt pretensioner end piece assembly 1 typically includes components such as a seat belt lever 15, a pretensioner seat 12, a gas generator 13, a cylinder 14, and a mounting bracket 11. The seat belt lever 15, the gas generator 13, and the cylinder 14 are all mounted on the pretensioner seat 12, which is then mounted on the vehicle body via the mounting bracket 11.

[0047] In the specific structure, the aforementioned cylinder 14 is arranged along the front-rear direction of the vehicle, the gas generator 13 is located above the cylinder 14 and is inclined relative to the cylinder 14, and the mounting bracket 11 is preferably bolted to the seat crossbeam 4 in the vehicle floor assembly. Furthermore, the seat belt pretensioner assembly 1 is usually located near the vehicle side panel 5, the mounting bracket 11 is located on the side of the pretensioner seat 12 away from the vehicle side panel 5, and from the perspective of the inside and outside of the vehicle, the mounting bracket 11 is located inside the pretensioner seat 12.

[0048] Of course, any structural parts not mentioned in the seat belt pretensioner assembly 1 of this embodiment can refer to relevant structures in the vehicle body known to those skilled in the art. For example, the seat belt lever 15 is connected to the seat belt, the mounting bracket 11 includes a first connecting part connected to the vehicle body, and a second connecting part connected to the pretensioner seat 12, etc. When a collision occurs, the gas generator 13 receives an electrical signal and starts to work, tightening the seat belt lever 15. The seat belt lever 15 drives the seat belt to move, thereby restraining the occupants in the vehicle, eliminating the slack gap between the seat belt and the occupants, fixing the occupants to the seats, reducing the risk of the occupants hitting the steering wheel, dashboard and other components due to inertia, reducing the injury in the collision, thereby achieving the protection of the occupants in the vehicle.

[0049] However, the very arrangement of the mounting bracket 11 located inside the seatbelt lever 15 causes the seatbelt pretensioner assembly 1 to generate an inward flipping moment. When the vehicle collision energy is too large, this can cause the mounting bracket 11 to deform, resulting in displacement of the seatbelt pretensioner assembly 1 and ultimately causing the entire seatbelt restraint system to fail. Therefore, the limiting structure of this embodiment is particularly suitable for solving the problem of large displacement of the seatbelt pretensioner assembly 1 caused by the mounting bracket 11 being located inside the seatbelt lever 15.

[0050] In this embodiment, as a preferred implementation, combined with Figure 1 and Figure 4 As shown, the limiting bracket 2 includes a first connecting plate 21 and a second connecting plate 22 connected together. Both the first connecting plate 21 and the second connecting plate 22 are arranged along the vertical direction of the vehicle. The first connecting plate 21 is connected to the vehicle body, and the limiting part 221 is provided on the second connecting plate 22.

[0051] It is understandable that the limiting bracket 2 includes a first connecting plate 21 and a second connecting plate 22 arranged along the vertical direction of the vehicle. The first connecting plate 21 is connected to the vehicle body, and the limiting part 221 is provided on the second connecting plate 22. This facilitates the arrangement and installation of the limiting bracket 2 in the vehicle body and reduces space occupation.

[0052] In detail, both the first connecting plate 21 and the second connecting plate 22 are arranged along the vertical direction of the vehicle, that is, in a vertical state. At the same time, the first connecting plate 21 is arranged along the vertical direction of the vehicle, which enables the first connecting plate 21 to be connected to the rear side wall of the seat crossbeam 4, and the second connecting plate 22 to be arranged in a parallel manner with the side wall 5 of the vehicle body. In this way, the arrangement and installation of the limiting bracket 2 can be achieved without affecting the arrangement of surrounding environmental components.

[0053] It is worth mentioning that, in this embodiment, the seat belt pretensioning end piece assembly 1, in addition to the above, Figure 1 As shown, cylinder 14 and gas generator 13 are located behind pretensioner seat 12. Limiting bracket 2 is connected to the rear side wall of seat beam 4. Alternatively, depending on the installation and arrangement requirements of seat belt pretensioner assembly 1, cylinder 14 and gas generator 13 can be located in front of pretensioner seat 12. However, in this case, limiting bracket 2 also needs to be appropriately adjusted to connect with the front side wall of seat beam 4. The limiting bracket 2 on the front side wall of seat beam 4 and the limiting bracket 2 on the rear side wall of seat beam 4 have the same structure and can be considered as mirror images of each other. That is, in this embodiment... Figure 1 The document only shows a preferred example of the seat belt pretensioner assembly 1 and the limiting bracket 2, and the embodiments are also described using this preferred example to illustrate the limiting structure.

[0054] Furthermore, in this embodiment, as a preferred implementation, combined with Figure 3 and Figure 4 As shown, the front side of the second connecting plate 22 is connected to the first connecting plate 21, and the rear side of the second connecting plate 22 is connected to the limiting part 221. The limiting part 221 is located in the middle of the seat belt pretensioning end piece assembly 1 along the front-rear direction of the whole vehicle.

[0055] The main advantage of this design is that it avoids the problem that when the limiting part 221 is closer to the rear of the seat belt pretensioner assembly 1, the required size of the limiting bracket 2 is larger, which is not conducive to improving the structural stability of the limiting bracket 2 and is also prone to resonance and abnormal noise during driving. At the same time, it also avoids the problem that when the limiting part 221 is closer to the front of the pretensioner generator, the required limiting force of the limiting bracket 2 is larger, which places excessive demands on the overall structural performance of the limiting bracket 2 and makes it difficult to design and develop.

[0056] In specific implementation, the limiting part 221 of this embodiment can be specifically set at 1 / 2 of the cylinder 14 in the seat belt pretensioning end piece assembly 1 along the front-rear direction of the whole vehicle (e.g. Figure 3 As shown in the figure, in order to ensure the structural stability of the limit bracket 2 while having sufficient limiting force on the cylinder 14, thereby realizing the function of limiting the displacement of the seat belt pretensioning end piece assembly 1.

[0057] Furthermore, in this embodiment, to ensure that the limiting part 221 is arranged at 1 / 2 of the cylinder 14 in the seat belt pretensioning end piece assembly 1 along the longitudinal direction of the vehicle, see still... Figure 3 As shown, the second connecting plate 22 is preferably designed to be roughly arc-shaped when viewed from the inside and outside of the vehicle. This structural design also helps to save the materials used in the preparation of the limiting bracket 2, reduce the manufacturing cost of the limiting bracket 2, and save the arrangement space of the limiting bracket 2, thus avoiding affecting the arrangement and installation of other surrounding components.

[0058] Of course, in addition to being arranged at 1 / 2 of the cylinder 14 along the front-rear direction of the vehicle, the limiting part 221 in this embodiment can also be set and adjusted according to the actual displacement restriction requirements of the cylinder 14. For example, the limiting part 221 can be arranged in the range of 1 / 3 to 3 / 5 of the cylinder 14 along the front-rear direction of the vehicle, and specifically it can be 1 / 3 or 3 / 5, etc.

[0059] Meanwhile, in this embodiment, as a preferred implementation, see [reference needed]. Figure 7 As shown, from the bottom to the top, the second connecting plate 22 gradually tilts towards the inward side of the vehicle. It can be understood that this gradual tilting of the second connecting plate 22 towards the inward side allows its arrangement to be close to the displacement direction of the seatbelt pretensioner assembly 1, that is, close to being parallel to the deformation direction of the mounting bracket 11. Compared to a vertical arrangement, this avoids the second connecting plate 22 generating a flipping moment towards the inward side of the vehicle, thereby minimizing the deformation of the limiting bracket 2 and limiting the displacement of the seatbelt pretensioner assembly 1.

[0060] Furthermore, in this embodiment, as a preferred implementation, see [reference needed]. Figure 4 and Figure 6 As shown, the top of the first connecting plate 21 is provided with a first flange 212, and the top of the second connecting plate 22 is provided with a second flange 222. The first flange 212 and the second flange 222 are overlapped together along the vertical direction of the whole vehicle.

[0061] This configuration allows for the formation of a self-welding structure by setting a first flange 212 and a second flange 222, with the first flange 212 and the second flange 222 overlapping together along the vertical direction of the vehicle. This enhances the support effect between the first connecting plate 21 and the second connecting plate 22, thereby improving the overall deformation resistance of the limit bracket 2.

[0062] It is worth mentioning that self-welding structures generally refer to structural forms that can achieve connection under specific conditions without additional filler materials or complex external welding processes through their own material properties or structural design. Using self-welding structures can reduce the use of filler materials and welding equipment, which helps to reduce costs and save space. There is no need to reserve welding bevels or configure additional connectors. At the same time, the connection parts of self-welding structures have the same composition as the base material, which can also avoid compatibility problems of welding dissimilar materials, thus facilitating large-scale production.

[0063] In this embodiment, the lap joint between the first flange 212 and the second flange 222 can be achieved through common welding methods without the need for additional filling materials or complex external welding processes. This allows the limiting bracket 2 to form a self-welding structure. Since the self-welding structure of the limiting bracket 2 is located at the top between the first connecting plate 21 and the second connecting plate 22, it can effectively improve the deformation resistance of the limiting bracket 2, especially the deformation resistance of the top area at the connection position of the first connecting plate 21 and the second connecting plate 22.

[0064] Furthermore, the overlap area between the first flange 212 and the second flange 222 in this embodiment is as large as possible to ensure sufficient connection and support strength, thereby improving the reliability of the limiting bracket 2. Simultaneously, in this embodiment, by overlapping the first flange 212 and the second flange 222, the first connecting plate 21 and the second connecting plate 22 can support each other, giving the limiting bracket 2 higher structural strength and resistance to deformation.

[0065] In addition, see Figure 4 and Figure 5 As shown in the illustration, in this preferred embodiment, the limiting bracket 2 includes a third connecting plate 23 disposed between the first connecting plate 21 and the second connecting plate 22, with the third connecting plate 23 located at the bottom of the first connecting plate 21 and the second connecting plate 22. The third connecting plate 23 reduces tensile deformation at the connection point between the first connecting plate 21 and the second connecting plate 22, particularly improving the tensile deformation resistance of the bottom region of the connection point, thereby enhancing the overall structural performance of the limiting bracket 2.

[0066] In specific implementation, the third connecting plate 23 of this embodiment gradually tilts from top to bottom toward the side that forms an angle between the first connecting plate 21 and the second connecting plate 22, and the third connecting plate 23 has a similar triangular design in overall visual appearance. The main advantage of this setting is that it can optimize the stress distribution between the first connecting plate 21 and the second connecting plate 22 and improve the deformation resistance of the bottom of the limiting bracket 2.

[0067] Meanwhile, in this embodiment, as a preferred implementation, it still combines... Figure 4 and Figure 5 As shown, the second connecting plate 22 is provided with a reinforcing rib 224, one end of which extends to the first connecting plate 21, and the other end of which extends at least to the limiting part 221.

[0068] It is understandable that by setting a reinforcing rib 224, with one end of the reinforcing rib 224 extending to the first connecting plate 21 and the other end of the reinforcing rib 224 extending at least to the limiting part 221, the deformation resistance of the connection position between the first connecting plate 21 and the second connecting plate 22 can be improved, and the risk of the limiting bracket 2 being pulled out and failing can be reduced.

[0069] It is worth mentioning here that, in the specific implementation of this embodiment, the limiting part 221, the first connecting plate 21 and the second connecting plate 22 are preferably integrally stamped. The limiting part 221 can be bent by the second connecting plate 22 according to the requirement that the limiting part 221 surrounds the seat belt pretensioning end piece assembly 1, so as to ensure the connection stability between the limiting part 221 and the second connecting plate 22. At the same time, the first flange 212 can be bent by the first connecting plate 21 towards the side with an angle between the first connecting plate 21 and the second connecting plate 22, and the second flange 222 can be bent by the second connecting plate 22 towards the side with an angle between the first connecting plate 21 and the second connecting plate 22, so as to facilitate the first flange 212 and the second flange 222 to overlap together.

[0070] Furthermore, specifically, the first flange 212 is formed by bending a portion of the first connecting plate 21, and the second flange 222 is formed by bending a portion of the second connecting plate 22. The main advantage of this arrangement is that it allows the first flange 212 and the second flange 222 to overlap better, while also allowing the top of the side of the first connecting plate 21 away from the second connecting plate 22 to form a... Figure 7 The notch 213 shown in the figure forms a through hole structure between the first connecting plate 21, the second connecting plate 22, the first flange 212 and the second flange 222, so as to optimize the stress distribution and achieve the weight reduction of the limiting bracket 2.

[0071] Furthermore, in this embodiment, the other end of the reinforcing rib 224 can preferably extend along the extension direction of the limiting portion 221 to improve the structural strength of the limiting portion 221 area and avoid the inability to form a good limiting effect on the seat belt pretensioning end piece assembly 1. Moreover, the reinforcing rib 224 can be formed by a portion of the second connecting plate 22 and the limiting portion 221 protruding to one side. The protrusion height of the reinforcing rib 224 relative to the second connecting plate 22 and the limiting portion 221 can preferably be set between 2mm and 4mm to improve the structural strength of the connection position of the limiting portion 221, the second connecting plate 22, the first connecting plate 21 and the second connecting plate 22, and to prevent the limiting bracket 2 from being pulled out and failing.

[0072] Furthermore, the reinforcing rib 224 helps prevent the second connecting plate 22 from springing back during the stamping process of the limiting bracket 2, thereby improving the stamping performance. Of course, in specific implementations, the protrusion height of the reinforcing rib 224 in this embodiment can be 2mm, 3mm, or 4mm, etc., to achieve a relatively superior reinforcing effect.

[0073] In addition, in this embodiment, as a preferred implementation, see [reference needed]. Figure 5 As shown, the bottom of the second connecting plate 22 is provided with a third flange 223, which is located in the middle of the second connecting plate 22 along the front-rear direction of the vehicle. This arrangement can help improve the torsional deformation resistance of the second connecting plate 22, reduce the deformation risk in the middle area of ​​the second connecting plate 22, and thus improve the overall performance of the limit bracket 2.

[0074] In specific implementation, the third flange 223 of this embodiment is bent from the second connecting plate 22 to the side away from the first connecting plate 21. The main advantage of this arrangement is that it can be set separately from the first flange 212, the second flange 222 and the third connecting plate 23 on both sides of the second connecting plate 22, forming structural differentiation, and further improving the overall structural strength of the second connecting plate 22 and the limiting bracket 2, so as to prevent the limiting bracket 2 from deforming and the seat belt pretensioning end piece assembly 1 from failing to limit the failure.

[0075] Secondly, in Figure 3 and Figure 5 In the state shown, the third flange 223 of this embodiment can preferably be configured with a structural design similar to the second connecting plate 22, that is, it is roughly arc-shaped when viewed from the inside and outside of the vehicle. The arc length and arc width of the third flange 223 can also be set and adjusted according to the structural reinforcement requirements and anti-deformation requirements of the second connecting plate 22. For example, the ratio of its arc length to the arc length of the second connecting plate 22 is 1 / 2, 2 / 3 or 3 / 4; the ratio of its arc width to the arc width of the second connecting plate 22 is 1 / 4 or 1 / 5, etc.

[0076] In addition, in this embodiment, as a preferred implementation, combined with Figure 4 and Figure 7 As shown, the seat belt pretensioner assembly 1 includes a cylinder 14. Along the vertical direction of the vehicle, at least the area above the middle of the cylinder 14 is surrounded by a limiting part 221, which is U-shaped. This arrangement allows for the enclosure of at least a portion of the seat belt pretensioner assembly 1. When the seat belt pretensioner assembly 1 is displaced, it can be hooked, thereby limiting the displacement of the seat belt pretensioner assembly 1 along the vertical and horizontal directions of the vehicle.

[0077] It is worth mentioning that the "U" shape in this embodiment does not refer to the limiting part 221 (in Figure 7 The shape of the limiting part 221 in the state shown is not strictly a letter "U" shape, but rather that it is roughly structurally similar to the letter "U". In specific implementation, the limiting part 221 may also have a shape that is compatible with the second connecting plate 22.

[0078] In this embodiment, as a preferred implementation, there is a gap s between the limiting part 221 and the cylinder 14, which can ensure that there is a reasonable safe distance between the seat belt pretensioning end piece assembly 1 and the limiting bracket 2 during the assembly process, thereby reducing the risk of scratching the workpiece during the assembly process.

[0079] The gap s between the limiting part 221 and the cylinder 14 can preferably be set to be between 4-6mm, so as to ensure that there is a reasonable safe distance between the seat belt pretensioning end piece assembly 1 and the limiting part 221 during the assembly process, so as not to scratch the workpiece during the assembly process, and also to avoid excessive displacement of the seat belt pretensioning end piece assembly 1 due to excessive gap.

[0080] In specific implementation, the gap s can be set to 4mm, 5mm, or 6mm, etc. Furthermore, it should be noted that, based on the "U"-shaped design of the limiting part 221, the gap s refers to the gap between the portion of the limiting part 221 corresponding to the cylinder 14 and the cylinder 14, that is, in... Figure 7 In the state shown, the limiting part 221 at least surrounds the upper half of the cylinder 14, and a gap s is formed between the outer surface of the upper half of the cylinder 14 and the inner surface (the side facing the cylinder 14) of the limiting part 221.

[0081] Furthermore, in this embodiment, as a preferred implementation, see [reference needed]. Figure 1 As shown, the limiting structure in this embodiment also includes fasteners 3. The limiting bracket 2 is connected to the vehicle body via multiple fasteners 3. Here, the limiting bracket 2 is connected to the vehicle body via multiple fasteners 3, which not only ensures the connection strength between the limiting bracket 2 and the vehicle body, but also prevents the limiting bracket 2 from rotating relative to the vehicle body with respect to a single fastener 3, thus preventing the limiting of the seat belt pretensioner assembly 1 from failing.

[0082] Specifically, combined Figure 7 As shown, in this embodiment, the first connecting plate 21 of the limiting bracket 2 has a connecting hole 211 through which the fastener 3 passes, and the seat crossbeam 4 in the vehicle body has a screw hole. After the fastener 3 passes through the connecting hole 211, it is screwed into the screw hole to form a connection between the first connecting plate 21 and the seat crossbeam 4, which constitutes the installation of the limiting bracket 2 on the vehicle body. If necessary, a projection weld nut can also be provided on the seat crossbeam 4 to facilitate the screwing operation of the bolt fastener 3.

[0083] It should be noted that in this embodiment, multiple fasteners 3 are provided for two reasons. First, to ensure the connection strength between the limiting bracket 2 and the seat crossbeam 4, preventing the limiting bracket 2 from rotating relative to the vehicle body with a single fastener 3 as the center. Second, to ensure that the spacing between two adjacent fasteners 3 is not too small, as this would cause interference between the fasteners 3 and tools during assembly, hindering the installation and removal of the fasteners 3. Specifically, the fasteners 3 in this embodiment can be bolts commonly used by those skilled in the art.

[0084] In this embodiment, when the vehicle collision energy is too large and the seat belt pretensioner assembly 1 flips around the mounting bracket 11 towards the inward side of the vehicle, causing the displacement of the cylinder 14 to exceed the gap s, since the limiting part 221 at least surrounds the upper half of the cylinder 14, the limiting part 221 will first contact the cylinder 14. Then, the flipping force of the seat belt pretensioner assembly 1 is transmitted to the limiting part 221 through the cylinder 14. The limiting part 221 then transmits the flipping force to the first connecting plate 21 through the second connecting plate 22 and the third connecting plate 23, and finally to the seat crossbeam 4 and the vehicle body. With the support and cooperation of the seat crossbeam 4, the first connecting plate 21 and the second connecting plate 22, the limiting part 221 presses against the cylinder 14 to prevent the cylinder 14 from continuing to move, thereby achieving the displacement limitation of the seat belt pretensioner assembly 1.

[0085] Thus, the limiting structure of this embodiment can limit the displacement of the seat belt pretensioner assembly 1 relative to the vehicle body when the vehicle collision energy is too large, thereby limiting the displacement of the seat belt pretensioner assembly 1. This solves the problem in the prior art where, when the vehicle collision energy is too large, the mounting bracket 11 in the seat belt pretensioner assembly 1 deforms, causing the seat belt pretensioner assembly 1 to displace, which leads to the failure of the entire seat belt restraint system. This can help improve the safety of the entire vehicle.

[0086] Example 2

[0087] This embodiment relates to a vehicle, which is equipped with a seat belt pretensioner end piece assembly 1 and the limiting structure in Embodiment 1.

[0088] In this embodiment, the vehicle, by setting the limiting structure in Embodiment 1, can limit the displacement of the seat belt pretensioner assembly 1 relative to the vehicle body during a vehicle collision, thereby preventing the failure of the entire seat belt restraint system, which helps to improve the overall vehicle safety performance and the protection effect of the occupants, thus helping to enhance the competitiveness of the vehicle in the market.

[0089] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A limiting structure for limiting the displacement of a seatbelt pretensioner assembly (1) in a vehicle body, characterized in that: Includes a limiting bracket (2) connected to the vehicle body; The end of the limiting bracket (2) connected to the vehicle body is located on the side of the seat belt pretensioning end piece assembly (1) facing the inside of the vehicle, and the limiting bracket (2) is provided with a limiting part (221); At least a portion of the seat belt pretensioner assembly (1) is surrounded by the limiting portion (221), and the limiting portion (221) is capable of limiting the displacement of the seat belt pretensioner assembly (1) relative to the vehicle body during a vehicle collision.

2. The limiting structure according to claim 1, characterized in that: The limiting bracket (2) includes a first connecting plate (21) and a second connecting plate (22) connected together; The first connecting plate (21) and the second connecting plate (22) are both arranged along the vertical direction of the vehicle. The first connecting plate (21) is connected to the vehicle body, and the limiting part (221) is provided on the second connecting plate (22).

3. The limiting structure according to claim 2, characterized in that: The front side of the second connecting plate (22) is connected to the first connecting plate (21), the rear side of the second connecting plate (22) is connected to the limiting part (221), and the limiting part (221) is located in the middle of the seat belt pretensioning end piece assembly (1) along the front-rear direction of the vehicle.

4. The limiting structure according to claim 2, characterized in that: From the bottom to the top of the second connecting plate (22), the second connecting plate (22) is gradually tilted towards the inside of the vehicle.

5. The limiting structure according to claim 2, characterized in that: The top of the first connecting plate (21) is provided with a first flange (212), and the top of the second connecting plate (22) is provided with a second flange (222). The first flange (212) and the second flange (222) are joined together along the vertical direction of the whole vehicle.

6. The limiting structure according to claim 2, characterized in that: The limiting bracket (2) includes a third connecting plate (23) disposed between the first connecting plate (21) and the second connecting plate (22), and the third connecting plate (23) is located at the bottom of the first connecting plate (21) and the second connecting plate (22).

7. The limiting structure according to claim 2, characterized in that: The second connecting plate (22) is provided with a reinforcing rib (224), one end of which extends to the first connecting plate (21), and the other end of which extends at least to the limiting portion (221); and / or, The bottom of the second connecting plate (22) is provided with a third flange (223), which is located in the middle of the second connecting plate (22) along the front-rear direction of the vehicle.

8. The limiting structure according to claim 1, characterized in that: The seat belt pretensioner assembly (1) has a cylinder (14), and along the vertical direction of the vehicle, at least the area above the middle of the cylinder (14) is surrounded by the limiting part (221). The limiting part (221) is U-shaped, and / or there is a gap s between the limiting part (221) and the cylinder (14).

9. The limiting structure according to any one of claims 1 to 8, characterized in that: It also includes fasteners (3); The limiting bracket (2) is connected to the vehicle body via a plurality of fasteners (3).

10. A vehicle, characterized in that: The vehicle is provided with a seat belt pretensioner end piece assembly (1) and a limiting structure as described in any one of claims 1 to 9.

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