Steel wire rope for automobile safety belt buckle

Abstract

The utility model provides a kind of steel wire rope for automobile safety belt lock catch belongs to steel wire rope technical field, including steel wire rope body, the steel wire rope body is made of center strand and 6 outer layer strands, the structure of center strand and outer layer strand is same, and center strand diameter is greater than outer layer strand diameter, 6 outer layer strands are spirally wound in center strand outside, wherein 3 outer layer strands are left-handed, and another 3 outer layer strands are right-handed, and left-handed outer layer strand and right-handed outer layer strand are arranged at intervals. The utility model improves the rigidity of the vertical direction of steel wire rope, avoids safety belt lock catch to shake due to the low rigidity of steel wire rope, effectively improves the protection effect of safety belt.

Description

Technical Field

[0001] This utility model belongs to the field of wire rope technology, and in particular relates to a wire rope for car seat belt buckles. Background Technology

[0002] The car seat belt buckle is fixed to the fixed anchor point of the vehicle frame by steel wire rope. As the key load-bearing component that realizes the locking function, traction transmission and structural connection inside the car seat belt buckle, the steel wire rope must meet multiple technical requirements such as high strength, wear resistance and fatigue resistance. Its performance plays a decisive role in the safety factor of the entire seat belt buckle system.

[0003] Due to differences in buckle structures, the required length of steel wire rope also varies. Furthermore, the overall rigidity of existing steel wire ropes is relatively low, especially in the vertical direction. This causes the seatbelt buckle to sway back and forth, and during sudden braking or a collision, inertia can cause the seatbelt to shift, failing to ensure it remains in the correct position and affecting its protective effect. Utility Model Content

[0004] In view of the defects or deficiencies in the existing technology, this utility model provides a steel wire rope for car seat belt buckles, which improves the vertical rigidity of the steel wire rope, avoids the seat belt buckle from shaking due to the low rigidity of the steel wire rope, and effectively improves the protective effect of the seat belt.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An embodiment of this utility model provides a steel wire rope for a car seat belt buckle, including a steel wire rope body. The steel wire rope body is made of a central strand and six outer strands twisted together. The central strand and the outer strands have the same structure, and the diameter of the central strand is larger than that of the outer strands. The six outer strands are spirally wound around the outside of the central strand, of which three outer strands are left-handed and the other three are right-handed. The left-handed and right-handed outer strands are arranged alternately.

[0006] Furthermore, the outer strand is formed by twisting two layers of steel wires together in one go, with the steel wires of the outer strand in line contact.

[0007] Furthermore, the outer strand includes 3 outer strand inner filaments, 3 first outer strand outer filaments, and 3 second outer strand outer filaments, wherein the diameter of the first outer strand outer filament is larger than the diameter of the second outer strand outer filament, and the diameter of the second outer strand outer filament is larger than the diameter of the outer strand inner filament.

[0008] Furthermore, the three outer strand inner filaments are spirally wound around the central axis of the outer strand, and the three first outer strand outer filaments and the three second outer strand outer filaments are wound alternately around the outside of the three outer strand inner filaments.

[0009] Furthermore, the three first outer layer outer layer filaments are embedded in the groove formed by two adjacent outer layer inner layer filaments, and the three second outer layer outer layer filaments are located between two adjacent first outer layer outer layer filaments.

[0010] Furthermore, the central strand is formed by twisting two layers of steel wires together in one operation, with the steel wires of the central strand in line contact.

[0011] Furthermore, the central strand includes 3 inner core filaments, 3 outer core filaments of the first central strand, and 3 outer core filaments of the second central strand, wherein the diameter of the outer core filaments of the first central strand is larger than the diameter of the outer core filaments of the second central strand, and the diameter of the outer core filaments of the second central strand is larger than the diameter of the inner core filaments of the central strand.

[0012] Furthermore, the three inner core strands are spirally wound around the central axis of the core strand, and the three outer core strands of the first core strand and the three outer core strands of the second core strand are wound alternately around the outer side of the three inner core strands.

[0013] Furthermore, the three first central strand outer layer filaments are embedded in the groove formed by two adjacent central strand inner layer filaments, and the three second central strand outer layer filaments are located between two adjacent first central strand outer layer filaments.

[0014] Furthermore, the lay length of the wire rope body is 7 to 8 times the diameter of the wire rope body, the lay length of the outer strand is 8 to 10 times the diameter of the outer strand, and the lay length of the center strand is 8 to 10 times the diameter of the center strand.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model sets up a central strand and outer strands, with multiple outer strands spirally wound around the outside of the central strand. Some of the outer strands are left-handed, and the other part is right-handed. The left-handed and right-handed outer strands are arranged alternately, which effectively improves the rigidity of the wire rope in the vertical direction, making the wire rope less prone to bending and preventing the safety belt buckle from shaking due to the low rigidity of the wire rope, thus effectively improving the protective effect of the safety belt.

[0016] 2. The central strand and outer strand of this utility model have the same structure. A first outer strand and a second outer strand with different diameters are wound around the outside of multiple inner strands that are spirally wound, so that the steel wires in the central strand and the outer strand are in line contact, thereby increasing the contact area between the steel wires, effectively ensuring the structure of the steel wire rope, and further improving the overall rigidity of the steel wire rope. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the wire rope in an embodiment of this utility model; Figure 2 This is a diagram showing the external structure of the wire rope in an embodiment of this utility model; Among them, 1. wire rope body; 2. outer strand; 3. center strand; 4. outer strand of the first outer strand; 5. outer strand of the second outer strand; 6. inner strand of the outer strand; 7. outer strand of the first center strand; 8. outer strand of the second center strand; 9. inner strand of the center strand. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] A typical embodiment of this utility model is as follows: Figure 1 and Figure 2 As shown, a steel wire rope for a car seat belt buckle includes a steel wire rope body 1, which is made of a central strand 3 and six outer strands 2 twisted together. The central strand 3 and the outer strands 2 have the same structure, and the diameter of the central strand 3 is larger than the diameter of the outer strands 2. The six outer strands 2 are spirally wound around the outside of the central strand 3, of which three outer strands are left-handed and the other three are right-handed. The left-handed and right-handed outer strands are arranged alternately, thereby effectively ensuring the vertical rigidity of the steel wire rope body 1.

[0020] The outer strand 2 is formed by twisting two layers of steel wire in one piece, with the steel wires in line contact. Specifically, the outer strand 2 includes three inner outer strand wires 6, three first outer strand wires 4, and three second outer strand wires 5. The diameter of the first outer strand wire 4 is larger than the diameter of the second outer strand wire 5, and the diameter of the second outer strand wire 5 is larger than the diameter of the inner outer strand wire 6. The three inner outer strand wires 6 are spirally wound around the central axis of the outer strand 2. The three first outer strand wires 4 and the three second outer strand wires 5 are wound alternately around the outside of the three inner outer strand wires 6. The three first outer strand wires 4 are embedded in the grooves formed by two adjacent inner outer strand wires 6, and the three second outer strand wires 5 are located between two adjacent first outer strand wires 4.

[0021] The central strand 3 is formed by twisting two layers of steel wire in one piece, with the steel wires in line contact. Specifically, the central strand 3 includes three inner central strand wires 9, three first central strand outer strand wires 7, and three second central strand outer strand wires 8. The diameter of the first central strand outer strand wire 7 is larger than the diameter of the second central strand outer strand wire 8, and the diameter of the second central strand outer strand wire 8 is larger than the diameter of the inner central strand wire 9. The three inner central strand wires 9 are spirally wound around the central axis of the central strand 3. The three first central strand outer strand wires 7 and the three second central strand outer strand wires 8 are wound alternately around the outside of the three inner central strand wires 9. The three first central strand outer strand wires 7 are embedded in the grooves formed by two adjacent inner central strand wires 9, and the three second central strand outer strand wires 8 are located between two adjacent first central strand outer strand wires 7.

[0022] By making the steel wires in the outer strand 2 and the central strand 3 all in line contact, the contact area between the steel wires can be increased, further improving the overall rigidity of the steel wire rope body 1.

[0023] The outer surfaces of the steel wires in the outer strand 2 and the central strand 3 are coated with one of the following: pure zinc, zinc-aluminum alloy, and zinc-aluminum rare earth alloy.

[0024] Furthermore, the lay length of the wire rope body 1 is 7 to 8 times the diameter of the wire rope body 1; the lay length of the outer strand 2 is 8 to 10 times the diameter of the outer strand 2; and the lay length of the center strand 3 is 8 to 10 times the diameter of the center strand 3.

[0025] The pre-deformation rate of the outer strands 2 during the twisting of the wire rope body 1 is 75-85%.

[0026] The stress state of the outer strand 2 is -2 to 0 turns; the stress state of the center strand 3 is -3 to 0 turns, where loose twist is "-" and twisted twist is "+". The overall stress state of the wire rope body 1 is 0 turns.

[0027] Taking a 4.2mm diameter steel wire rope as an example, the outer strand 2 and the center strand 3 are both drawn from high-carbon steel high-quality carbon wire rods with a diameter of 5.5mm. Specifically, the high-carbon steel high-quality carbon wire rods with a diameter of 5.5mm are first roughly drawn to 1.20~2.20mm as rough wire blanks. The 1.2~2.2mm rough wire blanks are then heat-treated and hot-dip galvanized to produce heat-treated steel wires with a diameter of 1.2~2.2mm and a certain thickness of coating.

[0028] Heat-treated steel wire of 1.2~2.2mm is drawn into rope-making wire of 0.27~0.55mm using a wire drawing machine, and then stress is fully relieved using a straightener. The coating weight of the steel wire needs to be 60~100 times the wire diameter. The outer strand 2 is made of 0.27~0.5mm galvanized steel wire twisted in a set arrangement, with a twist pitch of 12.2mm and a diameter of 1.36mm.

[0029] Specifically, the outer layer 2 consists of three 0.27mm outer layer inner filaments 6, three 0.5mm first outer layer outer filaments 4, and three 0.4mm second outer layer outer filaments 5, twisted together in one operation.

[0030] The center strand 3 is made of 0.3~0.55mm galvanized steel wire twisted in a set arrangement, with a twist pitch of 13.6mm and a diameter of 1.51mm.

[0031] Specifically, the center strand 3 consists of three 0.3mm inner layer filaments 9, three 0.55mm outer layer filaments 7, and three 0.44mm outer layer filaments 8, twisted together in one operation.

[0032] After twisting, the outer strand 2 and the center strand 3 need to be straightened separately to fully eliminate residual stress. The stress state of the outer strand 2 is -2 to 0 turns, and the stress state of the center strand 3 is -3 to 0 turns. Loose twist is "-", and twisting is "+". Then they are wound onto the H-beam spool.

[0033] Using an I-beam reel, six outer strands 2, each 1.36 mm in diameter, are twisted around the 1.51 mm center strand 3. The twist pitch is 29.4 mm. The actual measured diameter of the wire rope body 1 is 4.1~4.3 mm. The outer strands 2 need to undergo pre-deformation, and the deformation rate should be controlled at 75~85%.

[0034] After the wire rope body 1 is twisted, it must be straightened to fully eliminate residual stress. The stress state of the entire wire rope body 1 is 0 turns.

[0035] By setting a central strand and outer strands, multiple outer strands are spirally wound around the outside of the central strand. Some of the outer strands are left-handed, and the other part is right-handed. The left-handed and right-handed outer strands are arranged alternately, which effectively improves the rigidity of the wire rope in the vertical direction, making the wire rope less prone to bending. This prevents the safety belt buckle from shaking due to the low rigidity of the wire rope, and effectively improves the protective effect of the safety belt.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A steel wire rope for a car seatbelt buckle, characterized in that, The cable includes a wire rope body, which is made of a central strand and six outer strands twisted together. The central strand and the outer strands have the same structure, and the diameter of the central strand is larger than that of the outer strands. The six outer strands are spirally wound around the outside of the central strand, with three outer strands being left-handed and the other three being right-handed. The left-handed and right-handed outer strands are arranged alternately.

2. The steel wire rope for a car seatbelt buckle as described in claim 1, characterized in that, The outer strand is formed by twisting two layers of steel wires together in one go, with the steel wires of the outer strand in line contact.

3. The steel wire rope for a car seatbelt buckle as described in claim 1, characterized in that, The outer strand includes 3 inner strand filaments, 3 first outer strand outer strand filaments, and 3 second outer strand outer strand filaments, wherein the diameter of the first outer strand outer strand filament is larger than the diameter of the second outer strand outer strand filament, and the diameter of the second outer strand outer strand filament is larger than the diameter of the inner strand filament.

4. The steel wire rope for a car seatbelt buckle as described in claim 3, characterized in that, The three outer strand inner layer filaments are spirally wound around the central axis of the outer strand, and the three first outer strand outer layer filaments and the three second outer strand outer layer filaments are wound alternately around the outside of the three outer strand inner layer filaments.

5. The steel wire rope for a car seatbelt buckle as described in claim 4, characterized in that, The three first outer strand outer layer filaments are embedded in the groove formed by two adjacent outer strand inner layer filaments, and the three second outer strand outer layer filaments are located between two adjacent first outer strand outer layer filaments.

6. The steel wire rope for a car seatbelt buckle as described in claim 1, characterized in that, The central strand is formed by twisting two layers of steel wires together in one operation, with the steel wires in line contact with each other.

7. The steel wire rope for a car seatbelt buckle as described in claim 6, characterized in that, The central strand includes 3 inner core filaments, 3 outer core filaments of the first central strand, and 3 outer core filaments of the second central strand. The diameter of the outer core filaments of the first central strand is larger than the diameter of the outer core filaments of the second central strand, and the diameter of the outer core filaments of the second central strand is larger than the diameter of the inner core filaments of the central strand.

8. The steel wire rope for a car seatbelt buckle as described in claim 7, characterized in that, The three inner core strands are spirally wound around the central axis of the core strand, and the three outer core strands of the first core strand and the three outer core strands of the second core strand are wound alternately around the outside of the three inner core strands of the core strand.

9. The steel wire rope for a car seatbelt buckle as described in claim 8, characterized in that, The three outer filaments of the first central strand are embedded in the groove formed by the inner filaments of two adjacent central strands, and the three small filaments of the outer filaments of the second central strand are located between the two outer filaments of the first central strands.

10. The steel wire rope for a car seatbelt buckle as described in claim 1, characterized in that, The lay length of the wire rope body is 7 to 8 times the diameter of the wire rope body, the lay length of the outer strand is 8 to 10 times the diameter of the outer strand, and the lay length of the center strand is 8 to 10 times the diameter of the center strand.

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