CN221218282U - Compact multi-structure steel cord - Google Patents
Compact multi-structure steel cord Download PDFInfo
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- CN221218282U CN221218282U CN202322439048.XU CN202322439048U CN221218282U CN 221218282 U CN221218282 U CN 221218282U CN 202322439048 U CN202322439048 U CN 202322439048U CN 221218282 U CN221218282 U CN 221218282U
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- filament
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 30
- 239000010959 steel Substances 0.000 title claims abstract description 30
- 229910000746 Structural steel Inorganic materials 0.000 claims 6
- 239000000463 material Substances 0.000 abstract description 3
- 230000001815 facial effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of tire skeleton base materials, and particularly relates to a compact multi-structure steel cord, wherein the steel cord comprises a central strand, six outer strands surround the central strand and are braided and twisted on the central strand, the central strand comprises a central strand central filament, six central strand surface thread monofilaments surround the central strand central filament and are braided and twisted on the central strand central filament, the radial diameter of the central strand central filament is 0.17 cm-0.225 cm, and the radial diameter of the central strand surface thread monofilament is 0.15 cm-0.20 cm; the outer layer strand comprises an outer layer strand central filament, six outer layer strand surface thread monofilaments surround the outer layer strand central filament and are braided and twisted on the outer layer strand central filament, the radial diameter of the outer layer strand central filament is 0.155 cm-0.2 cm, the radial diameter of the outer layer strand surface thread monofilaments is 0.13 cm-0.175 cm, and the twisting directions of the central strand and the outer layer strand are consistent so as to avoid point contact between the central strand and the outer layer strand.
Description
Technical Field
The utility model belongs to the technical field of tire frame base materials, and particularly relates to a compact multi-structure steel cord.
Background
The steel cord is the main framework material of the all-steel radial tire, and the mass of the steel cord accounts for about 20% of the total mass of the tire, so that the influence on the quality of the tire is of great importance. The steel cord of the all-steel truck radial tire carcass also takes the repeated bending deformation of the sidewall into consideration in addition to the strength.
In the prior art, steel cords with the specifications of 7 x 0.22/7 x 0.25 and the like are commonly used in all-steel radial tires, the lay length of the steel cords is large, the diameter is large, gaps between steel wires are large, and the steel cords are twisted alternately left and right, so that point contact exists between monofilaments, the fatigue performance of the steel cords is reduced, and the service life of the tire is influenced.
Disclosure of utility model
In order to solve the technical problems, the utility model provides a fatigue-resistant and wear-resistant compact multi-structure steel cord with low cost, large breaking force, small lay length, small diameter, compact combination, light weight and strong loading performance,
The steel cord comprises a central strand, around which, if six outer strands are wound and twisted, wherein,
The central strand comprises a central strand central filament, six central strand surface thread monofilaments surround the central strand central filament and are braided and twisted on the central strand central filament, the radial diameter of the central strand central filament is 0.17 cm-0.225 cm, and the radial diameter of the central strand surface thread monofilaments is 0.15 cm-0.20 cm;
The outer strand comprises an outer strand central wire, six outer strand surface thread monofilaments surround the outer strand central wire and are braided and twisted on the outer strand central wire, the radial diameter of the outer strand central wire is 0.155 cm-0.2 cm, the radial diameter of the outer strand surface thread monofilaments is 0.13 cm-0.175 cm,
The central strand and the outer strand are twisted in the same direction to avoid point contact between the central strand and the outer strand.
As preferable: the radial dimensions of the outer strands are the same, and the radial diameter of the central strand is always greater than the radial diameter of the outer strands.
As preferable: the radial dimension of each central strand surface line monofilament is the same, and the radial diameter of the central strand central filament is always larger than that of the central strand surface line monofilament.
Further: when the radial diameter of the central strand central filament is 0.225cm, the radial diameter of the central strand facial line monofilament is 0.20cm; when the radial diameter of the central strand central filament is 0.17cm, the radial diameter of the central strand facial line monofilament is 0.15cm.
As preferable: the radial dimension of each outer layer strand surface thread monofilament is the same, and the radial diameter of the outer layer strand central thread is always larger than the radial diameter of the outer layer strand surface thread monofilament.
Further: when the radial diameter of the central filament of the outer layer strand is 0.2cm, the radial diameter of the monofilament of the surface line of the outer layer strand is 0.175cm; when the radial diameter of the central filament of the outer layer strand is 0.155cm, the radial diameter of the monofilament of the surface line of the outer layer strand is 0.13cm.
In the utility model, the central strand and the outer layer strands are both arranged in a spiral-like structure in which the outer layer monofilaments are twisted around the central monofilament, and simultaneously, the twisting direction on the central strand and the twisting direction on the outer layer strands are kept consistent to twist into a steel cord. In the twisting process, the outer strand is pressed inwards by twisting force, and the smooth outer surface structure of the steel wire (strand) is added, so that the convex parts on the outer surface of the outer strand are matched and embedded into the concave lines on the outer surface of the central strand to a great extent (as shown in figure 1),
On the basis, the scheme adopts thin-diameter monofilaments, reasonable number of monofilaments and reasonable number of strands: the outer layer strand which is braided and twisted around the central strand is six strands, and the number of the central strand surface thread filaments which are braided and twisted around the central strand central filament is exactly six, as shown in figure 1, the six central strand surface thread filaments are equivalent to six concave lines formed on the surface of the central strand and are in one-to-one correspondence with the six outer layer strands outside the central strand, thus, each outer layer strand is provided with concave lines for embedding, the contact between the central strand and the outer layer strand is avoided, the tight combination among strands in the steel cord is promoted, the gaps between the filaments and the filaments are small, the twisting distance is small, the twisting precision is high, the breaking force is high, the flexibility of the cord is realized, and the weight is reduced.
Drawings
Figure 1 is a schematic radial cross-sectional view of a compact multi-structure steel cord twisting structure according to an embodiment of the present utility model,
Wherein, the 100-steel cord is provided with a plurality of grooves,
10-Central strand, 11-central strand central filament, 12-central strand upper thread monofilament,
20-Outer strand, 21-outer strand central filament, 22-outer strand upper thread monofilament.
Detailed Description
As shown in fig. 1, the steel cord 100 includes a central strand 10, six outer strands 20 of the same radial dimension uniformly surrounding the central strand 10 and braided onto the central strand 10, wherein,
The central strand 10 comprises a central strand central filament 11, six central strand surface filaments 12 with the same radial dimension uniformly surround the central strand central filament 11 and are braided and twisted on the central strand central filament 11, the radial diameter of the central strand central filament 11 is 0.17 cm-0.225 cm, the radial diameter of the central strand surface filaments 12 is 0.15 cm-0.20 cm, and the radial diameter of the central strand central filament 11 is always larger than the radial diameter of the central strand surface filaments 12,
The outer strand 20 comprises an outer strand central filament 21, six outer strand surface filaments 22 with the same radial dimension uniformly surround the outer strand central filament 21 and are braided and twisted on the outer strand central filament 21, the radial diameter of the outer strand central filament 21 is 0.155 cm-0.2 cm, the radial diameter of the outer strand surface filaments 22 is 0.13 cm-0.175 cm, the radial diameter of the outer strand central filament 21 is always larger than the radial diameter of the outer strand surface filaments 22,
The radial diameter of the central strand 10 is always greater than the radial diameter of each outer strand 20, and the central strand 10 is twisted in line with each outer strand 20 to avoid point contact between the central strand 10 and the outer strands 20.
Example 1
(0.225 Cm+6×0.20 cm) +6×6×0.175 cm:
In the steel cord of the above structure of FIG. 1, the radial diameter of the center strand wire 11 is 0.225cm, and the radial diameter of the center strand wire monofilament 12 is 0.20cm; the radial diameter of the outer ply strand core wire 21 is 0.2cm, and the radial diameter of the outer ply strand surface wire monofilament 22 is 0.175cm.
After the tight multi-structure steel cord of this example was twisted, the central strand 10 had a diameter of 0.6cm, the outer layer strands 20 had a diameter of 0.53cm, and the whole cord was twisted on the basis that the central strand 10 was always larger than the outer layer strands 20, with a twisting pitch of 10.5/5.4, a cord diameter of 1.61cm, and a breaking force of 3100N.
Example 2
(0.17 Cm+6×0.15 cm) +6×6×0.13 cm:
In the steel cord of the above structure of FIG. 1, the radial diameter of the center strand wire 11 is 0.17cm, and the radial diameter of the center strand wire monofilament 12 is 0.15cm; the radial diameter of the outer ply strand core wire 21 is 0.155cm, and the radial diameter of the outer ply strand surface wire monofilament 22 is 0.13cm.
After the compact multi-structure steel cord of this example was twisted, the central strand 10 had a diameter of 0.47cm, the outer layer strands 20 had a diameter of 0.41cm, the whole cord was twisted on the basis that the central strand 10 was always larger than the outer layer strands 20, the twisting pitch was 8.8/4.3, the cord diameter was 1.23cm, and the breaking force was 1950N.
In the above embodiments, the actual overall radial diameter of the formed steel cord is smaller than the sum of the radial diameters of the central strand 10 and the two outer strands 20, besides the twisting force applied in the twisting operation, the combination of the central strand 10 and the outer strands 20 is avoided, the combination of the filaments is promoted, the gaps between the filaments and the strands are small, the twisting pitch is small, the twisting precision is high, the breaking force is high, and the flexibility and the weight of the cord are realized.
Claims (6)
1. A compact multi-structural steel cord, characterized by: the steel cord (100) comprises a central strand (10), six outer strands (20) surrounding the central strand (10) and being braided onto the central strand (10),
The central strand (10) comprises a central strand central filament (11), six central strand surface thread monofilaments (12) are wound around the central strand central filament (11) and are twisted on the central strand central filament (11), the radial diameter of the central strand central filament (11) is 0.17 cm-0.225 cm, the radial diameter of the central strand surface thread monofilaments (12) is 0.15 cm-0.20 cm,
The outer layer strand (20) comprises an outer layer strand central wire (21), six outer layer strand surface wire monofilaments (22) are wound around the outer layer strand central wire (21) and are twisted on the outer layer strand central wire (21), the radial diameter of the outer layer strand central wire (21) is 0.155 cm-0.2 cm, the radial diameter of the outer layer strand surface wire monofilaments (22) is 0.13 cm-0.175 cm,
The central strand (10) is twisted in accordance with the outer layer strand (20) to avoid point contact between the central strand (10) and the outer layer strand (20).
2. A compact multi-structural steel cord according to claim 1, characterized in that: the radial dimensions of the outer strands (20) are the same, and the radial diameter of the central strand (10) is always greater than the radial diameter of the outer strands (20).
3. A compact multi-structural steel cord according to claim 1, characterized in that: the radial dimension of each central strand surface line monofilament (12) is the same, and the radial diameter of the central strand central wire (11) is always larger than the radial diameter of the central strand surface line monofilament (12).
4. A compact multi-structural steel cord according to claim 3, wherein: when the radial diameter of the central strand central filament (11) is 0.225cm, the radial diameter of the central strand surface filament (12) is 0.20cm; when the radial diameter of the central strand central filament (11) is 0.17cm, the radial diameter of the central strand surface filament (12) is 0.15cm.
5. A compact multi-structural steel cord according to claim 1, characterized in that: the radial dimension of each outer layer strand surface thread (22) is the same, and the radial diameter of the outer layer strand central thread (21) is always larger than the radial diameter of the outer layer strand surface thread (22).
6. A compact multi-structural steel cord according to claim 5, wherein: when the radial diameter of the outer layer strand central wire (21) is 0.2cm, the radial diameter of the outer layer strand surface wire monofilament (22) is 0.175cm; when the radial diameter of the outer layer strand central filament (21) is 0.155cm, the radial diameter of the outer layer strand surface thread monofilament (22) is 0.13cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322439048.XU CN221218282U (en) | 2023-09-08 | 2023-09-08 | Compact multi-structure steel cord |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322439048.XU CN221218282U (en) | 2023-09-08 | 2023-09-08 | Compact multi-structure steel cord |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221218282U true CN221218282U (en) | 2024-06-25 |
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ID=91576641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322439048.XU Active CN221218282U (en) | 2023-09-08 | 2023-09-08 | Compact multi-structure steel cord |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221218282U (en) |
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2023
- 2023-09-08 CN CN202322439048.XU patent/CN221218282U/en active Active
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