A limiting structure for a seat back, a vehicle seat and a vehicle

Abstract

The application discloses a limiting structure for a seat back, a carrier seat and a carrier, which is located on a non-gas spring side of the seat back and comprises a limiting pin and a limiting piece. The limiting pin is fixedly connected with one of the seat back or a seat framework, and the limiting piece is fixedly connected with the other one of the seat back and the seat framework. The limiting piece is provided with a limiting slot, and the limiting pin is inserted into the limiting slot and movably connected with the limiting piece. The limiting pin and the limiting piece are added to effectively limit the moving stroke of the seat back relative to the seat framework and improve the limiting effectiveness. Meanwhile, the limiting pin and the limiting piece are arranged on the non-gas spring side, can support and disperse the stress in cooperation with the original gas spring, and improve the structural strength of the seat back as a whole under high-strength dynamic impact working conditions. Furthermore, a bidirectional constraint mechanism can be formed to further limit the displacement of the seat back under impact load, and the structural stability and use safety are improved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a limiting structure for a seat back, a vehicle seat, and a vehicle. Background Technology

[0002] In existing adjustable seat backrests, the seat backrest forms a pivot structure through a screw-locking structure at the pivot position. The limiting mechanism for the adjustment travel is only fixed by a gas spring on one side and provides support for the seat backrest. The support strength is limited, resulting in the seat not being able to effectively limit the movement. This structure can meet the basic requirements under static conditions, but under high-intensity dynamic impact conditions, such as during a collision, the overall structural strength is insufficient, making it difficult to meet the dynamic 50 km / h crash test requirements in the latest GB13057-2023 regulations, resulting in insufficient safety.

[0003] Furthermore, the gas spring locking force is 4000N. In the dynamic 50km / h crash test, the actual force on the gas spring far exceeded the locking threshold, causing the gas spring limit to fail and the seat back to be severely deformed due to insufficient support on one side. In addition, the side without a gas spring is prone to excessive displacement under impact load, further exacerbating the risk of structural instability. Summary of the Invention

[0004] To address the problems existing in the prior art, this application provides a limiting structure for a seat back, a vehicle seat, and a vehicle, which can effectively improve the structural strength under high-intensity dynamic impact conditions, limit the displacement of the seat back under impact loads, and improve structural stability and safety of use.

[0005] This application provides a limiting structure for a seat back, located on the non-gas spring side of the seat back, including a limiting pin and a limiting member. The limiting pin is used to be fixedly connected to one of the seat back or the seat frame, and the limiting member is used to be fixedly connected to the other of the seat back and the seat frame. The limiting member has a limiting groove, and the limiting pin is inserted into the limiting groove and movably connected to the limiting member.

[0006] Furthermore, the limiting groove is a closed groove, and the limiting groove includes a first hole segment, a second hole segment, and a third hole segment that are connected. The second hole segment is located between the first hole segment and the second hole segment. The limiting pin can move between the first hole segment, the second hole segment, and the third hole segment to limit the movement stroke of the limiting pin.

[0007] Furthermore, the diameter of the second hole segment is larger than the diameter of the first hole segment, and the diameter of the second hole segment is larger than the diameter of the third hole segment.

[0008] Furthermore, the diameter difference between at least one of the first hole segment and the third hole segment and the limiting pin is 1.0 mm to 2.0 mm.

[0009] Furthermore, the maximum movement angle corresponding to the maximum movement stroke of the limiting pin in the limiting groove is 15° to 45°.

[0010] Furthermore, the fit tolerance between the limiting pin and the limiting groove is -0.5mm to +0.5mm.

[0011] Furthermore, it also includes a gas spring, one end of which is rotatably connected to the seat frame and the other end of which is rotatably connected to the seat back. The gas spring and the limiting pin are located on different sides of the seat back.

[0012] Furthermore, the limiting pin is used for a welded fixed connection with one of the seat back or the seat frame, and the limiting member is used for a welded fixed connection with the other of the seat back and the seat frame.

[0013] This application also provides a vehicle seat, including a seat back, a seat frame, and a limiting structure for the seat back as described in any of the preceding claims.

[0014] This application also provides a vehicle, including the vehicle seat as described above.

[0015] Implementing this application will have the following beneficial effects:

[0016] This application adds a matching limiting pin and limiting component between the lower end of the seat back and the seat frame. As the limiting pin moves in the limiting groove of the limiting component, it can effectively limit the movement of the seat back relative to the seat frame, improving the effectiveness of the limiting. At the same time, the limiting pin and limiting component are located on the non-gas spring side, which can work together with the original gas spring to support the seat back. When under force, they can work together to distribute the force, improve the force balance, and greatly improve the overall structural strength of the seat back under high-intensity dynamic impact conditions. Compared with the seat back without the added limiting pin and limiting component, the overall stiffness is increased by more than 30%. Furthermore, the limiting pin and limiting component can form a two-way constraint mechanism with the original gas spring, further limiting the displacement of the seat back under impact load. The limiting accuracy is good, which greatly improves the structural stability and safety of use. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in the embodiments will be briefly described below, wherein the same components are represented by the same reference numerals. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0018] Figure 1 This is an assembly diagram of the limiting pin and limiting member in a limiting structure for a seat back in one possible embodiment of this application.

[0019] Figure 2 This is a three-dimensional structural diagram of a vehicle seat having a limiting structure for the seat back, as one possible embodiment of this application.

[0020] Figure 3 This is a schematic diagram of the installation structure of the seat back and the limiting pin in one possible embodiment of this application.

[0021] Figure 4 for Figure 2 Front view of the vehicle seat;

[0022] Figure 5 for Figure 4 A sectional view of the vehicle seat along section AA;

[0023] Figure 6 This is a schematic diagram of the limiting pin in one possible implementation of this application;

[0024] Figure 7 This is a schematic diagram of the limiting member in one possible implementation of this application;

[0025] Figure 8 for Figure 2 A schematic diagram of the back structure of a vehicle seat.

[0026] In the figure, the corresponding reference numerals are: 1-limiting pin, 2-limiting component, 21-limiting groove, 210-first hole segment, 211-second hole segment, 212-third hole segment, 3-gas spring, 4-seat backrest, 5-seat frame. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0028] To address the problem that existing single-sided seat backrest limiting mechanisms cannot meet the impact resistance requirements under dynamic working conditions, and suffer from poor structural reliability and safety, this application provides a limiting structure for a seat back, a vehicle seat, and a vehicle, wherein the vehicle includes the vehicle seat, such as... Figure 1 and Figure 2As shown, the vehicle seat includes a seat back 4, a seat frame 5, and a limiting structure for the seat back; in this embodiment, as... Figure 1 As shown, the limiting structure for the seat back includes a limiting pin 1 and a limiting member 2. The limiting pin 1 is fixedly connected to either the seat back 4 or the seat frame 5, and the limiting member 2 is fixedly connected to the other of the seat back 4 and the seat frame 5. The limiting member 2 has a limiting groove 21, and the limiting pin 1 is inserted into the limiting groove 21 and movably connected to the limiting member 2. The limiting pin 1 and the limiting member 2 are jointly provided on the non-gas spring side of the seat back 4. That is, the mutually cooperating limiting pin 1 and the limiting member 2 are added to the non-gas spring side of the seat back 4 to form an effective limit on the non-gas spring side, so that the displacement of the backrest under dynamic conditions is within a controllable stroke range. At the same time, the limiting pin 1 and the limiting member 2 can support the seat back 4, so that the force distribution of the backrest under dynamic load is more balanced, greatly improving the structural reliability and safety of the seat back 4 under dynamic conditions.

[0029] In some optional embodiments, the limiting pin 1 is fixedly connected to the seat frame 5, and the limiting member 2 is fixedly connected to the seat back 4; in other optional embodiments, such as Figure 2 As shown, the limiting pin 1 is fixedly connected to the seat back 4, as follows. Figure 3 As shown, specifically, the limiting pin 1 can be fixedly connected to the lower end of the seat back 4 near the seat frame 5, such as... Figure 4 and Figure 5 As shown, the limiting component 2 is fixedly connected to the seat frame 5. Specifically, the limiting component 2 can be fixedly connected to the rear end of the seat frame 5 near the seat back 4; the setting is flexible and the limiting effect is good.

[0030] Specifically, the limiting pin 1 is welded to one of the seat back 4 or the seat frame 5, and the limiting member 2 is welded to the other of the seat back 4 and the seat frame 5. In some optional embodiments, the limiting pin 1 is welded to the seat back 4, and the limiting member 2 is welded to the seat frame 5. In other optional embodiments, the limiting pin 1 is welded to the seat back 4, and the limiting member 2 is welded to the seat frame 5. By using welding technology, the connection strength and reliability between each component in the limiting structure for the seat back and the seat back 4 or the seat frame 5 can be greatly improved. It can also further distribute the force through the welding position, improve the rigidity and stability of the entire vehicle seat, and effectively improve the overall impact resistance under dynamic working conditions.

[0031] In some exemplary implementations, such as Figure 6As shown, the limiting pin 1 includes a first end and a second end, the diameter of the first end being smaller than the diameter of the second end; optionally, the second end is fixedly connected to the seat back 4, and the first end is inserted into the limiting groove 21 and can move within the limiting groove 21; alternatively, the first end is fixedly connected to the seat back 4, and the second end is inserted into the limiting groove 21 and can move within the limiting groove 21; thus, the limiting pin 1 and the limiting groove 21 cooperate to form a good limiting, strictly controlling the displacement of the seat back 4 under dynamic conditions within the desired travel range, greatly improving the overall impact resistance under dynamic conditions, such as collisions; exemplaryly, in some specific embodiments, the limiting pin 1 can be a T-shaped limiting pin 1, made of 45# steel, with high structural strength, convenient and reliable installation, and low cost.

[0032] In addition, in some exemplary embodiments, a pivot is provided at the lower end of the seat back 4. The seat back 4 is rotatably connected to the pivot by screw fastening, and the pivot is rotatably connected to the seat frame 5, so that the seat back 4 can rotate relative to the seat frame 5, thereby realizing the adjustable function of the seat back 4.

[0033] In some exemplary embodiments, the limiting member 2 with the limiting groove 21 is a sheet metal limiting member 2, with a through limiting groove 21 inside, which has high structural strength, is convenient and reliable to install, and has low cost.

[0034] Specifically, such as Figure 7 As shown, the limiting groove 21 is a closed groove. The edge of the limiting member 2 does not have a gap that connects with the limiting groove 21. This can prevent the limiting pin 1 from coming out of the limiting groove 21 and losing the limiting effect during use, and the overall limiting reliability is good.

[0035] Specifically, such as Figure 7 As shown, the limiting groove 21 includes a first hole segment 210, a second hole segment 211, and a third hole segment 212 that are connected. The second hole segment 211 is located between the first hole segment 210 and the second hole segment 211. The limiting pin 1 can move between the first hole segment 210, the second hole segment 211, and the third hole segment 212. Specifically, the limiting pin 1 can slide between the first hole segment 210, the second hole segment 211, and the third hole segment 212 to limit the movement stroke of the limiting pin 1. This ensures that the displacement of the limiting pin 1 under high-intensity dynamic working conditions is strictly limited to the movement stroke allowed by the limiting groove 21, thereby limiting the movement stroke of the seat back 4 and improving the overall impact resistance of the seat back 4 and the vehicle seat with this limiting structure. The structure has good reliability and safety.

[0036] Specifically, such as Figure 7As shown, the diameter of the second hole segment 211 is larger than the diameter of the first hole segment 210, and the diameter of the second hole segment 211 is larger than the diameter of the third hole segment 212. Furthermore, the diameters of the first hole segment 210, the second hole segment 211, and the third hole segment 212 are all larger than the diameter of the limiting pin 1, especially larger than the diameter of the smaller diameter first end of the limiting pin 1. On the one hand, the larger diameter of the second hole segment 211 can serve as an installation hole, facilitating the insertion of the limiting pin 1 to form an effective limiting structure with the limiting member 2, resulting in good installation convenience and minimizing obstruction to the movement of the limiting pin 1 in the limiting groove 21. On the other hand, the relatively smaller diameters of the first hole segment 210 and the third hole segment 212 are still larger than the diameter of the limiting pin 1, allowing the limiting pin 1 to move within the first hole segment 210 and the third hole segment 212, preventing jamming and improving ease of use.

[0037] Specifically, the diameter difference between at least one of the first hole segment 210 and the third hole segment 212 and the limiting pin 1 is 1.0 mm to 2.0 mm; in some optional embodiments, the diameter difference between the first hole segment 210 and the limiting pin 1 is 1.0 mm to 2.0 mm; in other optional embodiments, the diameter difference between the third hole segment 212 and the limiting pin 1 is 1.0 mm to 2.0 mm; in some preferred embodiments, the diameter difference between the first hole segment 210 and the limiting pin 1 is 1.0 mm to 2.0 mm, and the diameter difference between the third hole segment 212 and the limiting pin 1 is 1.0 mm to 2.0 mm.

[0038] Understandably, the diameter difference between at least one of the first hole segment 210 and the third hole segment 212 and the limiting pin 1 can be any value between 1.0 mm and 2.0 mm; for example, the diameter difference between at least one of the first hole segment 210 and the third hole segment 212 and the limiting pin 1 can be 1.0 mm, 1.2 mm, 1.3 mm, 1.5 mm, 1.6 mm, 1.75 mm, 1.8 mm, 2.0 mm, etc.; within this diameter difference range, the limiting pin 1 can be positioned between the first hole segment 210 and the third hole segment 212. The segment 212 slides freely and is not easily dislodged, thus generating displacement within the desired range under dynamic working conditions, thereby playing a certain buffering role and effectively limiting the movable travel of the seat back 4 within the area of ​​the first hole segment 210, the second hole segment 211 and the third hole segment 212, achieving reliable limiting, improving the impact resistance of the seat back 4 and the vehicle seat as a whole, and improving structural reliability and safety; for example, in some specific embodiments, the diameter difference between the first hole segment 210 and the limiting pin 1 is 1.5mm.

[0039] Specifically, such as Figure 7As shown, the maximum movement angle θ corresponding to the maximum travel of the limiting pin 1 in the limiting groove 21 is 15° to 45°; it can be understood that the maximum movement angle θ corresponding to the maximum travel of the limiting pin 1 in the limiting groove 21 can be any value between 15° and 45°; for example, the maximum movement angle θ corresponding to the maximum travel of the limiting pin 1 in the limiting groove 21 can be 15°, 18°, 20°, 22°, 30°, 37°, 40°, 45°, etc.; within this maximum movement angle range, a... The seat back 4 provides a certain buffering effect and can control the displacement within the desired travel range, achieving a good limiting effect. The overall stiffness is increased by more than 30% compared to the original structure without the limiting pin 1 and the limiting member 2, which is beneficial to improving the impact resistance, structural stability and safety of the seat back 4 and the vehicle seat as a whole. In some preferred embodiments, the maximum travel of the limiting pin 1 in the limiting groove 21 corresponds to the maximum travel angle θ of 15° to 25°, which is beneficial to further improve safety and limiting reliability.

[0040] Specifically, the fit tolerance between the limiting pin 1 and the limiting groove 21 is -0.5mm to +0.5mm; it can be understood that the fit tolerance between the limiting pin 1 and the limiting groove 21 can be any value within -0.5mm to +0.5mm; for example, the fit tolerance between the limiting pin 1 and the limiting groove 21 can be -0.5mm, -0.3mm, -0.2mm, -0.1mm, 0mm, +0.1mm, +0.2mm, +0.3mm, +0.5mm, etc.; within this fit tolerance range, the limiting accuracy is good, which can effectively limit the movement, so that the displacement of the seat back 4 under dynamic working conditions is strictly limited within the expected travel range, which is conducive to enhancing the reliability and safety of the seat back 4 and the vehicle seat.

[0041] Specifically, such as Figure 8 As shown, the limiting structure for the seat back also includes a gas spring 3. One end of the gas spring 3 is rotatably connected to the seat frame 5, and the other end is rotatably connected to the seat back 4. The gas spring 3 and the limiting pin 1 are located on different sides of the seat back 4, respectively. The two work together to support and distribute the force, and together form a bidirectional constraint mechanism on both sides of the seat back 4, which further improves the limiting reliability and limiting balance. Under high-intensity dynamic impact conditions, the displacement of the seat back 4 can also be strictly controlled within the expected stroke range, which is conducive to enhancing the impact resistance, structural reliability and safety of the entire vehicle seat.

[0042] This application provides a vehicle seat, such as Figure 2As shown, the vehicle seat includes a seat back 4, a seat frame 5, and a limiting structure for the seat back as described above. By adding a limiting mechanism including a limiting pin 1 and a limiting member 2 on the non-gas spring side, the two work together to form a double-sided constraint mechanism, which strictly controls the displacement of the seat back 4 within the desired stroke range under high-intensity dynamic conditions. Combined with the double-sided cooperative support and the structural setting of cooperative force distribution, the force distribution of the backrest under dynamic load is balanced, which significantly improves the overall impact resistance. Compared with the seat without the limiting pin 1 and the limiting member 2, the stiffness is increased by more than 30%, which greatly enhances the structural reliability and safety of the vehicle seat.

[0043] This application embodiment also provides a vehicle, including the vehicle seat as described above. The vehicle may include a vehicle, which may include different vehicle types such as buses, cars, and sedans. It can meet the limiting requirements under high-intensity dynamic impact conditions, has good structural reliability and safety, and is widely applicable.

[0044] Specifically, the vehicle may include at least one vehicle seat; when the vehicle includes one vehicle seat, a gas spring 3 is provided on one side of the vehicle seat, and a limiting pin 1 and a limiting member 2 are provided at the lower end of the other side to form a dual-sided cooperative limiting mechanism; when the vehicle includes at least two vehicle seats, optionally, multiple vehicle seats may be arranged in a row, with a gas spring 3 provided on one side of multiple vehicle seats, and at least one set of limiting pins 1 and limiting members 2 provided on the non-gas spring side of multiple vehicle seats where no gas spring 3 is provided. For example, on two vehicle seats arranged in a row, one vehicle seat has a gas spring 3 on one side, and another vehicle seat has a set of limiting pins 1 and limiting members 2 on one side; in some preferred embodiments, each vehicle seat has a gas spring 3 on one side and a limiting pin 1 and limiting member 2 on the other side, which greatly improves the impact resistance, structural reliability and safety of each vehicle seat under high-intensity dynamic working conditions.

[0045] Taking a specific embodiment as an example, the limiting pin 1 is welded to the seat back 4, and the limiting component 2 is welded to the seat frame 5. During assembly, the seat back 4 is tilted so that one part of the limiting pin 1 is embedded in the limiting groove 21 of the limiting component 2, and the seat back 4 is reset. Then, the bolts at the pivot of the seat back 4 are tightened so that the seat back 4 can rotate relative to the seat frame 5, but it is not easy to fall off at the pivot, and the rotational stability is good. Then, on the back side of the seat back 4, one end of the gas spring 3 is rotatably connected to the seat back 4, and the other end is rotatably connected to the seat frame 5 to complete the final assembly. The assembly is convenient and quick, and the overall structure has good stability.

[0046] The above description is merely some embodiments of this application and is not intended to limit this application. Those skilled in the art should understand that various changes and improvements may be made to this application, and any modifications, equivalent substitutions and improvements made in accordance with this application fall within the scope of protection claimed by this application.

Claims

1. A limiting structure for a seat back, characterized in that, Located on the non-gas spring side of the seat back (4), it includes a limiting pin (1) and a limiting member (2). The limiting pin (1) is used to be fixedly connected to one of the seat back (4) or the seat frame (5). The limiting member (2) is used to be fixedly connected to the other of the seat back (4) and the seat frame (5). The limiting member (2) has a limiting groove (21). The limiting pin (1) is inserted into the limiting groove (21) and is movably connected to the limiting member (2).

2. The limiting structure for a seat back as described in claim 1, characterized in that, The limiting groove (21) is a closed groove. The limiting groove (21) includes a first hole segment (210), a second hole segment (211), and a third hole segment (212) that are connected. The second hole segment (211) is located between the first hole segment (210) and the second hole segment (211). The limiting pin (1) can move between the first hole segment (210), the second hole segment (211), and the third hole segment (212) to limit the travel of the limiting pin (1).

3. The limiting structure for a seat back as described in claim 2, characterized in that, The diameter of the second hole segment (211) is greater than the diameter of the first hole segment (210), and the diameter of the second hole segment (211) is greater than the diameter of the third hole segment (212).

4. The limiting structure for a seat back as described in claim 3, characterized in that, The diameter difference between at least one of the first hole segment (210) and the third hole segment (212) and the limiting pin (1) is 1.0 mm to 2.0 mm.

5. The limiting structure for a seat back according to any one of claims 1-4, characterized in that, The maximum movement angle corresponding to the maximum movement stroke of the limiting pin (1) in the limiting groove (21) is 15° to 45°.

6. The limiting structure for a seat back according to any one of claims 1-4, characterized in that, The fit tolerance between the limiting pin (1) and the limiting groove (21) is -0.5mm to +0.5mm.

7. The limiting structure for a seat back according to any one of claims 1-4, characterized in that, It also includes a gas spring (3), one end of which is rotatably connected to the seat frame (5), and the other end is rotatably connected to the seat back (4). The gas spring (3) and the limiting pin (1) are located on different sides of the seat back (4).

8. The limiting structure for a seat back according to any one of claims 1-4, characterized in that, The limiting pin (1) is used for a welded fixed connection with one of the seat back (4) or the seat frame (5), and the limiting member (2) is used for a welded fixed connection with the other of the seat back (4) and the seat frame (5).

9. A vehicle seat, characterized in that, It includes a seat back (4), a seat frame (5), and a limiting structure for the seat back as described in any one of claims 1-8.

10. A vehicle, characterized in that, Includes the vehicle seat as described in claim 9.

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