Vehicle rear row safety belt lock catch force limiting assembly

Abstract

The utility model provides a vehicle back row safety belt lock catch force limiting assembly, and belongs to the technical field of vehicle accessories. The problem that an existing vehicle rear-row safety belt lock catch is not safe enough in use is solved. The vehicle rear row safety belt lock catch force limiting assembly comprises a steel wire rope and a mounting seat, the steel wire rope is provided with a connecting end fixedly connected with the mounting seat, the mounting seat is fixedly connected with a connecting rod for winding of the steel wire rope, a deformation piece is arranged between the steel wire rope and the connecting rod, and the deformation piece is provided with a stress part for winding of the steel wire rope. The stress part drives the deformation part to deform to provide buffering torque for the steel wire rope until the steel wire rope cannot be tightened, a limiting structure for limiting the deformation part is arranged on the mounting seat, and after the stress part is stressed and drives the deformation part to finish deformation, the limiting structure limits the deformation part all the time. The device has the advantages of being good in working stability, good in use safety and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle accessories and relates to a force limiting assembly, in particular to a vehicle rear seat belt buckle force limiting assembly. Background Art

[0002] At present, the rear seat belt buckle of automobiles is fixed to the car floor through a mechanical fixing structure, so that the part of the rear seat belt that passes around the abdomen of the occupant is tightly locked. When a traffic accident with emergency braking occurs, the rear occupants will rush forward due to inertia. The seat belt tightly around the abdomen of the rear passengers cannot provide a buffer, which will cause injuries to the abdomen of the rear occupants. In severe cases, it may cause cutting injuries, and the safety of use is not ideal.

[0003] In response to the above problems, people have made various improvements to the connection structure of the rear seat belt buckle of the car, and some have even applied for patents. For example, Chinese patent literature discloses a force limiting device for the rear seat belt buckle of the car [application number: 202222857567.3; authorization announcement number: CN218112572U], which includes a fixed seat for being fixedly connected to the bottom plate of the car, and the opposite two sides of the fixed seat have two connecting parts folded to the same side, a pin is passed through the two connecting parts, a steel wire rope is passed through the fixed seat, one end of the steel wire rope is fixedly connected to the fixed seat, and the other end of the steel wire rope is used to connect the buckle. The steel wire rope also has a winding portion with several turns wound around the pin, and a deformation member supported by the winding portion and capable of providing a buffering torque when the winding portion is tightened is provided between the winding portion and the pin.

[0004] The force limiting device of the rear seat belt buckle of the above-mentioned automobile is provided with a deformable part. When an emergency braking traffic accident occurs, the torque transmitted to the buckle by the seat belt wrapped around the abdomen of the rear occupant exceeds the set torque. At this time, the winding part is tightened, the deformable part provides a buffering torque, and the buckle drives the steel wire rope to extend outward to avoid injuries caused by the seat belt wrapped around the abdomen of the rear occupant, thereby improving the safety of use. However, the deformable part is prone to displacement or separation from the stress area during the force-bearing process. For example, when the deformable part in the above-mentioned patent is a pin shaft, the force on the pin shaft will cause one or both ends of the pin shaft to separate from the fixing seat, resulting in poor buffering torque provided, and there is a probability of causing abdominal injuries to the rear occupants. The safety of use is still not ideal. Summary of the invention

[0005] The utility model aims to solve the above problems existing in the prior art and provides a vehicle rear seat belt buckle force limiting assembly with good working stability and good use safety.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a vehicle rear seat belt buckle force limiting assembly, including a steel wire rope and a mounting seat with a mounting cavity inside, the steel wire rope having a connecting end fixedly connected to the mounting seat, the mounting seat being fixedly connected to a connecting rod for the steel wire rope to be wound around, a deformable part is provided between the steel wire rope and the connecting rod, the deformable part has a force-bearing part for the steel wire rope to bypass, when the steel wire rope is tightened, the force-bearing part drives the deformable part to deform to provide a buffering torque for the steel wire rope until the steel wire rope cannot be tightened, and it is characterized in that a limiting structure for limiting the deformable part is provided on the mounting seat, and when the force-bearing part is subjected to force and drives the deformation of the deformable part to end, the limiting structure always limits the deformable part.

[0007] In the above-mentioned vehicle rear seat belt buckle force limiting assembly, the deformable member is U-shaped, the middle cross bar of the deformable member is the force-bearing part, the side bars on both sides of the deformable member are arranged toward the connecting rod, and the limiting structure includes two limiting bars fixedly connected to the mounting seat, the two limiting bars are respectively located at the two inner bends of the deformable member and the outer walls of the rod body are provided for the deformable member to abut against, the steel wire rope is wound around the middle of the force-bearing part and is located between the two limiting bars, and the two side bars of the deformable member are respectively located between the corresponding limiting bars and the inner wall of the mounting seat, and after the deformation of the deformable member is completed, the two inner walls of the mounting seat are always provided for the two side bars to abut against.

[0008] In the above-mentioned vehicle rear seat belt buckle force limiting assembly, the inner walls on both sides of the mounting seat have a plurality of protruding limiting protrusions, and each limiting protrusion is respectively provided for the top and / or bottom of the two side rods of the deformable member to abut against.

[0009] As another case, in the above-mentioned vehicle rear seat belt buckle force limiting assembly, the inner walls on both sides of the mounting seat are provided with concave limit slots, and the two side rods are located in the corresponding limit slots. After the deformation of the deformable member is completed, the two side rods are driven by the force-bearing part to move along the limit slot away from the connecting rod, and the groove bottom of the limit slot is for the side rod to resist, and under the action of the force, the displaced parts of the two side rods are bent around the limit rod, and then driven by the force-bearing part to straighten, and this cycle is repeated until the deformation is completed. The limit slots prevent the two side rods from leaving the safety seat, ensuring smooth deformation.

[0010] In the above-mentioned vehicle rear seat belt buckle force limiting assembly, the force-bearing portion is sleeved with a curved limiting plate, and the limiting plate has a limiting surface which is a concave arc surface for the steel wire rope to pass around.

[0011] In the above-mentioned vehicle rear seat belt buckle force limiting assembly, a support block supported at the bottom of the deformable member is fixedly connected to the mounting seat, and the support block is provided with a clearance groove for the steel wire rope to bypass.

[0012] In the above-mentioned vehicle rear seat belt buckle force limiting assembly, the mounting seat has a front wall integrally connected to its two side walls, a limit block is embedded in the middle of the front wall, and the mounting seat has a connecting part located between the connecting rod and the force-bearing part. The number of the connecting parts is two and the two connecting ends of the steel wire rope are respectively connected. The steel wire rope is folded in half and passes around the connecting rod from bottom to top, and then passes around the force-bearing part from top to bottom, and passes through the limit block.

[0013] In the above-mentioned vehicle rear seat belt buckle force limiting assembly, the middle of the top of the two side walls of the mounting seat are provided with a groove, and the mounting seat cover is provided with a cover plate for covering the deformable parts, wire ropes, and connecting rods in the mounting cavity, the cover plate has an embedded groove and a protrusion for pressing the limit block down, the end of the cover plate away from the front wall has a flange folded toward the bottom surface of the mounting seat, the mounting seat has a limiting hole, and the flange has a limiting protrusion embedded in the limiting hole, and two limiting rods pass through the cover plate, the mounting seat and the supporting block, and the two ends are riveted to the cover plate and the mounting seat respectively.

[0014] As another case, in the above-mentioned vehicle rear seat belt buckle force limiting assembly, the deformable member is H-shaped, the force bearing part is the middle transverse rod, and the limiting structure includes two clamping blocks located between the connecting rod and the deformable member on the mounting seat, the two clamping blocks have blind holes, and the ends of the vertical rods on both sides of the deformable member are respectively inserted into the blind holes of the two clamping blocks. The clamping blocks and the blind holes limit the deformable member to prevent the deformable member from being forced to separate from the mounting seat or being displaced. The force bearing part completely bears the tightening force generated by the emergency braking of the wire rope and deforms to provide a complete buffer torque. The deformable member does not have the problem of failure. The working stability of the vehicle rear seat belt buckle force limiting assembly is good and the use safety is good.

[0015] Compared with the prior art, the rear seat belt buckle force limiting assembly of the vehicle has a compact and reasonable structure, which can prevent the deformable part from being forced to separate from the mounting seat. The deformable part fully bears the compression force generated by the wire rope during emergency braking and deforms to provide a complete buffering torque. The deformable part does not have failure problems. The rear seat belt buckle force limiting assembly of the vehicle has good working stability and good safety in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural diagram of the rear seat belt buckle force limiting assembly of this vehicle.

[0017] Figure 2 It is a three-dimensional structural diagram of the rear seat belt buckle force limiting assembly of this vehicle without the cover plate.

[0018] Figure 3 It is a three-dimensional structural diagram of the rear seat belt buckle force limiting assembly of this vehicle without the cover plate and wire rope.

[0019] Figure 4 It is a three-dimensional structural diagram of the middle cover of the rear seat belt buckle force limiting assembly of this vehicle.

[0020] In the figure, 1, wire rope; 2, mounting seat; 21, front wall; 22, connecting part; 23, groove; 3, connecting end; 4, connecting rod; 5, deformable member; 51, force-bearing part; 52, side rod; 6, limiting rod; 7, limiting protrusion; 8, limiting plate; 9, supporting block; 10, limiting block; 11, cover plate; 111, protrusion; 112, flange; 1121, limiting protrusion. DETAILED DESCRIPTION

[0021] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the rear seat belt buckle force limiting assembly of the vehicle includes a steel wire rope 1 and a mounting seat 2 with a mounting cavity inside. The steel wire rope 1 has a connecting end 3 fixedly connected to the mounting seat 2. The mounting seat 2 is fixedly connected to a connecting rod 4 for the steel wire rope 1 to be wound around. A deformable member 5 is provided between the steel wire rope 1 and the connecting rod 4. The deformable member 5 has a force-bearing portion 51 for the steel wire rope 1 to bypass. When the steel wire rope 1 is tightened, the force-bearing portion 51 drives the deformable member 5 to deform and provide a buffering torque for the steel wire rope 1 until the steel wire rope 1 cannot be tightened. A limiting structure for limiting the deformable member 5 is provided on the mounting seat 2, and when the force-bearing portion 51 is forced to drive the deformable member 5 to deform, the limiting structure always limits the deformable member 5.

[0023] When the rear seat belt buckle force limiting assembly of the vehicle is in use, the deformable member 5 provides support for the steel wire rope 1, and combined with the rigidity of the steel wire rope 1 itself, when the steel wire rope 1 is not subjected to a torque exceeding the set torque, the steel wire rope 1 will not tighten, and the seat belt buckle connected to the steel wire rope 1 will not move outward, which is a normal working state; when an emergency braking traffic accident occurs, the torque transmitted to the buckle by the seat belt wrapped around the abdomen of the rear occupant exceeds the set torque, at which time the steel wire rope 1 tightens, and the force-bearing portion 51 drives the deformable member 5 to deform to provide a buffering torque, and the buckle drives the steel wire rope 1 to extend outward, preventing the seat belt wrapped around the abdomen of the rear occupant from causing harm to the occupant, until the steel wire rope 1 can no longer tighten, and the seat belt wrapped around the abdomen of the rear occupant plays a restraining role to protect the rear occupant, thereby improving the safety of use.

[0024] During use, the limiting structure limits the deformable member 5 to prevent the deformable member 5 from being separated from the mounting seat 2 due to force. The deformable member 5 fully bears the compression force generated by the wire rope 1 during emergency braking, and deforms to provide a complete buffering torque. The deformable member 5 does not have failure problems. The rear seat belt buckle force limiting assembly of the vehicle has good working stability and good safety in use.

[0025] To further elaborate, in this embodiment, the deformable member 5 is U-shaped, and the middle cross bar of the deformable member 5 is the force-bearing portion 51. The side bars 52 on both sides of the deformable member 5 are arranged toward the connecting rod 4. The limiting structure includes two limiting bars 6 fixedly connected to the mounting seat 2. The two limiting bars 6 are respectively located at the two inner bends of the deformable member 5 and the outer walls of the rod body are provided for the deformable member 5 to abut. The wire rope 1 is wound around the middle of the force-bearing portion 51 and is located between the two limiting bars 6. The two side bars 52 of the deformable member 5 are respectively located between the corresponding limiting bars 6 and the inner wall of the mounting seat 2. After the deformation of the deformable member 5 is completed, the two inner walls of the mounting seat 2 are always provided for the two side bars 52 to abut.

[0026] After the steel wire rope 1 is wound around the force-bearing part 51, the two ends of the force-bearing part 51 near the inner bend will abut against the two limit rods 6. The two limit rods 6 limit the deformation member 5 so that the force-bearing part 51 will not approach the connecting rod 4 without exceeding the set torque. When an emergency braking traffic accident occurs, the steel wire rope 1 is tightened, and the force-bearing part 51 is subjected to a torque exceeding the set torque. The middle part of the force-bearing part 51 is stressed and bends and displaces toward the connecting rod 4, and at the same time, a force is generated to drive the two side rods 52 to expand outward. The inner walls on both sides of the mounting seat 2 are provided for the ends of the two side rods 52 to abut against each other, so that the force-bearing part 51 drives the two side rods 52 to move in the direction away from the connecting rod 4, and under the action of the force, the displaced parts of the two side rods 52 are bent around the limiting rod 6, and then driven by the force-bearing part 51 to be straightened, and this cycle is repeated, thereby providing a buffer torque until the deformation ends. The two limiting rods 6 are always provided for the deformation member 5 to abut against, and the deformation member 5 will not separate from the limiting rod 6, thereby ensuring that the force-bearing part 51 and the two side rods 52 are deformed normally and have good working stability.

[0027] The steel wire rope 1 is located between the two limiting rods 6. Even if the steel wire rope 1 is subjected to uneven force, resulting in a deviation in the position around the middle of the force-bearing portion 51, the two limiting rods 6 play a limiting and blocking role on the steel wire rope 1, and the steel wire rope 1 still acts on the force-bearing portion 51 to deform it. The limiting rod 6 can be fixedly connected to the mounting seat 2 by existing connection methods such as riveting, welding, threaded connection, or tenon connection. In this embodiment, the limiting rod 6 is riveted, which is described in detail below.

[0028] The inner walls on both sides of the mounting seat 2 have a plurality of protruding limiting protrusions 7, each limiting protrusion 7 is respectively provided for the top and / or bottom of the two side rods 52 of the deformation member 5 to abut. This further plays a limiting role, and when the deformation member 5 is subjected to force, the two side rods 52 will not tilt and affect the deformation effect of the force-bearing part 51; in this embodiment, the mounting seat 2 is formed with four limiting protrusions 7 by riveting, and the inner walls on both sides of the mounting seat 2 have two limiting protrusions 7 for the top of the corresponding side rods 52 to abut; in actual manufacturing, the inner walls on both sides of the mounting seat 2 may have two rows of limiting protrusions 7 distributed up and down, and the two side rods 52 are respectively located between the corresponding two rows of limiting protrusions 7, and the limiting protrusions 7 limit the top and bottom of the side rods 52, and the limiting protrusions 7 located below the side rods 52 also play the role of lifting the deformation member 5, which is convenient for the connection of the wire rope 1; of course, in actual manufacturing, the mounting seat 2 may be threaded with screws, and the parts of the screws passing through the inner walls on both sides of the mounting seat 2 are limiting protrusions 7.

[0029] The force-bearing part 51 is sleeved with a curved limiting plate 8, which has a limiting surface for the steel wire rope 1 to bypass and is a concave arc surface. The limiting plate 8 is not only convenient for the connection of the steel wire rope 1, but also allows the limiting plate 8 to concentrate the torque applied by the steel wire rope 1 to the force-bearing part 51 to ensure the use effect. The limiting plate 8 also protects the limiting part to prevent the steel wire rope 1 from scratching the force-bearing part 51 and affecting the deformation effect. In this embodiment, the limiting plate 8 is an iron plate. In actual manufacturing, the limiting plate 8 can be a stainless steel plate, a carbon fiber plate, an aluminum alloy plate, or a high-molecular polyethylene plastic plate.

[0030] A support block 9 supported at the bottom of the deformable member 5 is fixedly connected to the mounting seat 2, and the support block 9 is provided with a clearance groove for the steel wire rope 1 to pass around. This facilitates the positioning of the deformable member 5, and also lifts the force-bearing part 51, which is convenient for the connection of the steel wire rope 1, and also avoids interference, and the deformation process of the force-bearing part 51 is smooth.

[0031] The mounting seat 2 has a front wall 21 connected to both side walls thereof, a stopper 10 is embedded in the middle of the front wall 21, and the mounting seat 2 has a connecting portion 22 located between the connecting rod 4 and the force-bearing portion 51. There are two connecting portions 22, and the two connecting ends 3 of the steel wire rope 1 are respectively connected. The steel wire rope 1 is folded in half and passes through the connecting rod 4 from bottom to top, and then passes through the force-bearing portion 51 from top to bottom, and passes through the stopper 10. In this way, the steel wire rope 1 is conveniently and firmly connected, and the torque applied by the steel wire rope 1 to the connecting rod 4 and the force-bearing portion 51 is concentrated and reasonable. In this embodiment, the two connecting ends 3 of the steel wire rope 1 pass through the connecting portion 22 and are riveted with a steel sleeve to achieve fixed connection. The single steel wire rope 1 is folded in half into two strands, with good connection strength and good working stability.

[0032] There are grooves 23 at the middle of the top of both side walls of the mounting seat 2. The mounting seat 2 is covered with a cover plate 11 that covers the deformable member 5, the wire rope 1, and the connecting rod 4 in the mounting cavity. The cover plate 11 has an embedded groove 23 and a convex block 111 that presses down the limit block 10. The end of the cover plate 11 away from the front wall 21 has a flange 112 folded toward the bottom surface of the mounting seat 2. The mounting seat 2 has a limit hole, and the flange 112 has a limit convex block 1121 embedded in the limit hole. The two limit rods 6 pass through the cover plate 11, the mounting seat 2, and the supporting block 9, and the two ends are riveted to the cover plate 11 and the mounting seat 2 respectively. This has a compact structure, the cover plate 11 and the mounting seat 2 are firmly connected, and the cover plate 11 plays a protective role to avoid damage to parts and ensure that the deformable member 5 works smoothly.

[0033] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. The specific embodiments described in this article are only used to illustrate the spirit of the utility model. The technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar way, but they will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

Claims

1. A vehicle rear seat belt buckle force limiting assembly, comprising a steel wire rope (1) and a mounting seat (2) having a mounting cavity therein, the steel wire rope (1) having a connecting end (3) fixedly connected to the mounting seat (2), the mounting seat (2) being fixedly connected to a connecting rod (4) for the steel wire rope (1) to be wound around, a deformable member (5) being provided between the steel wire rope (1) and the connecting rod (4), the deformable member (5) having a force-bearing portion (51) for the steel wire rope (1) to be wound around, when the steel wire rope (1) is tightened, the force-bearing portion (51) drives the deformable member (5) to deform to provide a buffer torque for the steel wire rope (1) until the steel wire rope (1) cannot be tightened, characterized in that: The mounting seat (2) is provided with a limiting structure for limiting the position of the deformable member (5), and when the force-bearing portion (51) is subjected to force and drives the deformable member (5) to complete deformation, the limiting structure always limits the position of the deformable member (5).

2. The vehicle rear seat belt buckle force limiting assembly according to claim 1, characterized in that: The deformable member (5) is in a U shape. The middle crossbar of the deformable member (5) is a force-bearing portion (51). The side bars (52) of the deformable member (5) are arranged toward the connecting rod (4). The limiting structure comprises two limiting bars (6) fixedly connected to the mounting seat (2). The two limiting bars (6) are respectively located at two inner bends of the deformable member (5) and the outer walls of the bars are provided for the deformable member (5) to abut against. The steel wire rope (1) is wound around the middle of the force-bearing portion (51) and is located between the two limiting bars (6). The two side bars (52) of the deformable member (5) are respectively located between the corresponding limiting bars (6) and the inner wall of the mounting seat (2). After the deformation of the deformable member (5) is completed, the two inner walls of the mounting seat (2) are always provided for the two side bars (52) to abut against.

3. The vehicle rear seat belt buckle force limiting assembly according to claim 2, characterized in that: The inner walls on both sides of the mounting seat (2) are provided with a plurality of protruding limiting protrusions (7), and each limiting protrusion (7) is respectively provided for the top and / or bottom of the two side rods (52) of the deformable member (5) to abut against.

4. The vehicle rear seat belt buckle force limiting assembly according to claim 2, characterized in that: The inner walls on both sides of the mounting seat (2) are provided with recessed limiting sliding grooves, and the rods (52) on both sides are located in the corresponding limiting sliding grooves.

5. The vehicle rear seat belt buckle force limiting assembly according to claim 2, 3 or 4, characterized in that: The force-bearing portion (51) is sleeved with a curved limiting plate (8), and the limiting plate (8) has a limiting surface which is a concave arc surface for the steel wire rope (1) to pass around.

6. The vehicle rear seat belt buckle force limiting assembly according to claim 5, characterized in that: A support block (9) supported on the bottom of the deformable member (5) is fixedly connected to the mounting seat (2), and the support block (9) is provided with a clearance groove for the steel wire rope (1) to bypass.

7. The vehicle rear seat belt buckle force limiting assembly according to claim 6, characterized in that: The mounting seat (2) has a front wall (21) connected to both side walls thereof, a limit block (10) is embedded in the middle of the front wall (21), and the mounting seat (2) has a connecting portion (22) located between the connecting rod (4) and the force-bearing portion (51). The number of the connecting portions (22) is two and the two connecting ends (3) of the steel wire rope (1) are respectively connected. The steel wire rope (1) is folded in half and passes through the connecting rod (4) from bottom to top, and then passes through the force-bearing portion (51) from top to bottom, and passes through the limit block (10).

8. The vehicle rear seat belt buckle force limiting assembly according to claim 7, characterized in that: The mounting seat (2) has a groove (23) at the middle of the top of both side walls. The mounting seat (2) is covered with a cover plate (11) for covering the deformable member (5), the steel wire rope (1) and the connecting rod (4) in the mounting cavity. The cover plate (11) has an embedded groove (23) and a protrusion (111) for pressing the limit block (10) downward. The end of the cover plate (11) away from the front wall (21) has a flange (112) folded toward the bottom surface of the mounting seat (2). The mounting seat (2) has a limit hole. The flange (112) has a limit protrusion (1121) embedded in the limit hole. Two limit rods (6) pass through the cover plate (11), the mounting seat (2) and the supporting block (9) and are riveted to the cover plate (11) and the mounting seat (2) at both ends.

9. The vehicle rear seat belt buckle force limiting assembly according to claim 1, characterized in that: The deformable member (5) is H-shaped, the force-bearing portion (51) is a middle transverse rod, and the limiting structure comprises two clamping blocks provided on the mounting seat (2) and located between the connecting rod (4) and the deformable member (5), the two clamping blocks having blind holes, and the ends of the vertical rods on both sides of the deformable member (5) are respectively inserted into the blind holes of the two clamping blocks.

Images