CN218384601U - CAN bus cable - Google Patents
CAN bus cable Download PDFInfo
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- CN218384601U CN218384601U CN202222839238.6U CN202222839238U CN218384601U CN 218384601 U CN218384601 U CN 218384601U CN 202222839238 U CN202222839238 U CN 202222839238U CN 218384601 U CN218384601 U CN 218384601U
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Abstract
The utility model discloses a CAN bus cable, it relates to communication transmission cable technical field, include: an outer layer protection unit, inside of which an accommodation space is formed; the reinforcing piece is arranged in the accommodating space, and two ends of the reinforcing piece are abutted to the inner side of the outer layer protection unit, so that the reinforcing piece separates the accommodating space to form a first accommodating cavity and a second accommodating cavity; a first cable unit disposed in the first accommodation cavity; a second cable unit disposed in the second accommodation cavity; the first cable unit and the second cable unit are respectively embedded in the embedded concave parts on the two sides of the reinforcing member. The utility model discloses a CAN bus cable has good signal transmission stability and cable mechanical properties, and has good signal anti-attenuation performance and fire behaviour.
Description
Technical Field
The utility model relates to a communication transmission cable technical field especially relates to a CAN bus cable.
Background
A CANBUS (Control Area Network BUS) BUS system, referred to as CAN BUS for short, is developed by united states of america general automobile company and bosch company for system equipment connection in the automobile industry, and then widely used in the automation industry including rail transit. At present, the CAN bus cable product structure for the domestic rail transit equipment is a 2x0.5 communication line plus a 1x0.5 neutral line structure, wherein the neutral line is a common polyethylene or polyolefin insulation core line, and is easily scratched and abraded in the using process and influenced by mechanical stress, so that the installation is difficult. In the irradiation process, residual electron beams penetrate through the shielding layer to reach the insulating layer, so that the characteristic impedance of the cable and the near-end crosstalk performance are suddenly changed. The neutral line is made of non-flame-retardant common polyethylene materials, so that the flame retardant property of the finished cable is insufficient, and the fire-proof requirement of EN 45545-2 is difficult to achieve. Due to the fact that core wires are easily extruded by filling, neutral wires and the like after being twisted in pairs and internal stress is accumulated, communication performance indexes related to the structure, such as cable attenuation, characteristic impedance and the like, are increased, and further the finished product structure CAN only use one pair of 2x0.5 communication wire pairs, if two wire pairs need to be used for communication, a CAN bus cable with a structure of 2x0.5 communication plus 1x0.5 neutral wires is used, wiring space is reduced, and wiring difficulty is increased. In addition, only one layer of outer sheath of the cable with the existing structure is made of flame retardant materials, the communication line pair and the adopted insulated core wire are both made of skin-bubble skin polyethylene insulation, and the neutral wire is made of polyethylene insulation materials and does not have the flame retardant characteristic. Resulting in the finished cable being difficult to pass the severe EN 45545-2 burn requirements.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a have good signal transmission stability and cable mechanical properties, and have good anti decay performance of signal and fire behaviour's CAN bus cable.
The above object of the present invention can be achieved by the following technical solutions:
the utility model provides a CAN bus cable, include:
an outer layer protection unit, inside of which an accommodation space is formed;
the reinforcing piece is arranged in the accommodating space, and two ends of the reinforcing piece are abutted to the inner side of the outer layer protection unit, so that the reinforcing piece separates the accommodating space to form a first accommodating cavity and a second accommodating cavity;
a first cable unit disposed in the first accommodation cavity;
a second cable unit disposed in the second accommodation cavity;
the first cable unit and the second cable unit are respectively embedded in the embedded concave parts on the two sides of the reinforcing member.
In a preferred embodiment, the first cable unit includes:
the two first conducting wires are arranged in parallel, and the respective axes of the two first conducting wires and the axis of the CAN bus cable are arranged in a coplanar manner;
a first neutral line disposed at one side of the two first conductive lines;
and the first wrapping layer is wrapped outside the two first conducting wires and the first neutral wire and is made of non-hygroscopic polyester materials.
In a preferred embodiment, the second cable unit includes:
the two second conducting wires are arranged in parallel, and the respective axes of the two first conducting wires, the respective axes of the two second conducting wires and the axis of the CAN bus cable are arranged in a coplanar manner;
a second neutral line provided at one side of the two second conductive lines, the first neutral line and the second neutral line being located at both sides of a plane formed by respective axes of the two first conductive lines, respective axes of the two second conductive lines, and an axis of the CAN bus cable, respectively;
and the second wrapping band layer is arranged on the outer sides of the two second conducting wires and the second neutral wire and is made of non-hygroscopic polyester materials.
In a preferred embodiment, the first conductive line includes:
a first conductor core formed by twisting a plurality of first conductive wires made of a nickel-plated copper material;
a first insulating sleeve wrapped around an outer side of the first conductor core;
the first neutral line includes:
a second conductor core formed by twisting a plurality of second conductive wires;
and the second insulating sleeve is arranged on the outer side of the second conductor core in a wrapping mode.
In a preferred embodiment, the second conductive line includes:
a third conductor core stranded by a plurality of first conductor wires made of a nickel-plated copper material;
a third insulating sleeve wrapped around the outside of the third conductor core;
the second neutral line includes:
a fourth conductor core formed by twisting a plurality of second conductive wires;
and the fourth insulating sleeve is wrapped on the outer side of the fourth conductor core.
In a preferred embodiment, the first insulating sleeve and the third insulating sleeve each include:
an inner insulating layer made of a low density polyethylene material such that a density of the inner insulating layer is less than or equal to 0.925g/cm3, a dielectric constant of the inner insulating layer being less than or equal to 2.33;
the middle insulating layer is wrapped on the outer side of the inner insulating layer and made of a nitrogen foaming high-density polyethylene material, so that the density of the middle insulating layer is greater than or equal to 0.94g/cm & lt 3 & gt, and the dielectric constant of the middle insulating layer is less than or equal to 2.4;
and the outer insulating layer is wrapped on the outer side of the middle insulating layer and is made of a high-density polyethylene material, so that the density of the outer insulating layer is greater than or equal to 0.94g/cm & lt 3 & gt, and the dielectric constant of the outer insulating layer is less than or equal to 2.4.
In a preferred embodiment, the outer protection unit includes:
the first shielding layer is wrapped on the outer sides of the reinforcing piece, the first cable unit and the second cable unit so as to shield electromagnetic interference of the external environment on the first cable unit and the second cable unit, and is made of aluminum foil;
the second shielding layer is wrapped on the outer side of the first shielding layer to shield electromagnetic interference of an external environment on the first cable unit and the second cable unit, the second shielding layer is made of tinned copper wires through cross weaving, and the first shielding layer and the second shielding layer are used for enabling the transfer impedance of the outer-layer protection unit to be smaller than or equal to 20m omega/m;
the outer sheath layer is wrapped and arranged on the outer side of the second shielding layer and is made of low-smoke halogen-free flame-retardant materials.
In a preferred embodiment, the cable protection device further comprises a plurality of filling members, at least a part of the filling members are disposed in the first accommodating cavity, and outer walls thereof abut against the outer side of the first cable unit, the inner side of the outer layer protection unit and the reinforcing member, and the rest of the filling members are disposed in the second accommodating cavity, and outer walls thereof abut against the outer side of the second cable unit, the inner side of the outer layer protection unit and the reinforcing member.
In a preferred embodiment, the thickness of the reinforcing member is 20% to 30% of the inner diameter of the outer protective unit.
In a preferred embodiment, the reinforcement is made of a flame retardant silicone rubber material.
The utility model has the characteristics and advantages that:
the embodiment of the utility model provides a CAN bus cable, through set up the reinforcement in the outer layer protection unit, make two cable units CAN the gomphosis on the reinforcement, the holistic stability of cable and mechanical properties have effectively been improved, and single cable has 4 communication lines and 2 neutral conductors promptly, with load multiplex transmission signal simultaneously, outer protection unit then CAN provide good anti-interference and anti-decay performance of signal for the cable is whole, and has good fire behaviour, guarantee the holistic long-time steady operation of cable.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 shows the overall structure schematic diagram of the CAN bus cable of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.
Referring to fig. 1, the present invention provides a CAN bus cable, including: an outer layer protection unit 1, inside of which an accommodation space is formed; the reinforcing piece 2 is arranged in the accommodating space, and two ends of the reinforcing piece 2 are abutted to the inner side of the outer-layer protection unit 1, so that the reinforcing piece 2 separates the accommodating space to form a first accommodating cavity 31 and a second accommodating cavity 32; a first cable unit 41 disposed in the first accommodation chamber 31; a second cable unit 42 disposed in the second accommodation chamber 32; wherein, the reinforcing member 2 is formed with the embedding recess 21 on both sides, and the first cable unit 41 and the second cable unit 42 are respectively embedded in the embedding recess 21 on both sides of the reinforcing member 2.
To further explain the CAN bus cable of the embodiment of the present invention, the following further explains its specific structure, connection relationship, size limitation, etc., wherein:
in a preferred embodiment, the first cable unit 41 includes: the two first conducting wires 411 are arranged in parallel, and the respective axes of the two first conducting wires 411 and the axis of the CAN bus cable are arranged in a coplanar manner; a first neutral line 412 disposed at one side of the two first conductive lines 411; and a first wrapping layer 413 wrapped outside the two first conductive wires 411 and the first neutral wire 412, the first wrapping layer 413 being made of a non-hygroscopic polyester material.
In a preferred embodiment, the second cable unit 42 includes: two second conducting wires 421, the two second conducting wires 421 are arranged in parallel, and the respective axes of the two first conducting wires 411, the respective axes of the two second conducting wires 421 and the axis of the CAN bus cable are arranged in a coplanar manner; a second neutral line 422 provided at one side of the two second conductive lines 421, the first neutral line 412 and the second neutral line 422 being located at both sides of a plane formed by respective axes of the two first conductive lines 411, respective axes of the two second conductive lines 421, and an axis of the CAN bus cable, respectively; and a second wrapping layer 423 wrapped around the two second conductive lines 421 and the second neutral line 422, the second wrapping layer 423 being made of a non-hygroscopic polyester material.
In a preferred embodiment, the first conductive line 411 includes: a first conductor core 4111 formed by twisting a plurality of first conductive wires made of a nickel-plated copper material; a first insulating jacket 4112 that covers the outside of the first conductor core 4111; the first neutral line 412 includes: a second conductor core formed by twisting a plurality of second conductive wires; and the second insulating sleeve is wrapped on the outer side of the second conductor core.
In a preferred embodiment, the second conductive line 421 includes: a third conductor core 4211 twisted from a plurality of first conductor wires made of a nickel-plated copper material; a third insulating sleeve 4212 wrapped around the outside of the third conductor core 4211; the second neutral line 422 includes: a fourth conductor core formed by twisting a plurality of second conductive wires; and the fourth insulating sleeve is wrapped on the outer side of the fourth conductor core.
In a preferred embodiment, the first insulating sleeve 4112 and the third insulating sleeve 4212 each include: an inner insulating layer made of a low density polyethylene material such that a density of the inner insulating layer is less than or equal to 0.925g/cm3 and a dielectric constant of the inner insulating layer is less than or equal to 2.33; the middle insulating layer is wrapped on the outer side of the inner insulating layer and is made of a nitrogen foaming high-density polyethylene material, so that the density of the middle insulating layer is more than or equal to 0.94g/cm & lt 3 & gt, and the dielectric constant of the middle insulating layer is less than or equal to 2.4; and the outer insulating layer is wrapped on the outer side of the middle insulating layer and is made of a high-density polyethylene material, so that the density of the outer insulating layer is greater than or equal to 0.94g/cm & lt 3 & gt, and the dielectric constant of the outer insulating layer is less than or equal to 2.4.
In a preferred embodiment, the outer protective unit 1 comprises: a first shielding layer 11, which is wrapped around the reinforcing member 2, the first cable unit 41, and the second cable unit 42 to shield electromagnetic interference of the external environment to the first cable unit 41 and the second cable unit 42, wherein the first shielding layer 11 is made of aluminum foil; the second shielding layer 12 is wrapped on the outer side of the first shielding layer 11 to shield electromagnetic interference of an external environment on the first cable unit 41 and the second cable unit 42, the second shielding layer 12 is formed by cross weaving of tinned copper wires, and the first shielding layer 11 and the second shielding layer 12 are used for enabling transfer impedance of the outer-layer protection unit 1 to be smaller than or equal to 20m omega/m; and the outer sheath layer 13 is wrapped outside the second shielding layer 12, and the outer sheath layer 13 is made of a low-smoke halogen-free flame-retardant material.
In a preferred embodiment, the cable protection device further comprises a plurality of filling members 5, at least a portion of the filling members 5 are disposed in the first accommodating cavity 31, and outer walls thereof are disposed between the outer side of the first cable unit 41, the inner side of the outer protection unit 1, and the reinforcing member 2, and the rest of the filling members 5 are disposed in the second accommodating cavity 32, and outer walls thereof are disposed between the outer side of the second cable unit 42, the inner side of the outer protection unit 1, and the reinforcing member 2.
In a preferred embodiment, the thickness of the reinforcement 2 is 20% to 30% of the inner diameter of the outer protective unit 1.
In a preferred embodiment, the stiffener 2 is made of a flame retardant silicone rubber material.
Based on above structural description, the utility model discloses CAN bus cable has following beneficial effect:
the embodiment of the utility model provides a CAN bus cable, through set up reinforcement 2 in outer protection unit 1, make two cable units CAN the gomphosis on reinforcement 2, the holistic stability of cable and mechanical properties have effectively been improved, and single cable has 4 communication lines and 2 neutral conductors promptly, with load multiplex transmission signal simultaneously, outer protection unit 1 then CAN provide good anti-interference and anti-decay performance of signal for the cable is whole, and has good flame retardant property, guarantee the holistic long-time steady operation of cable.
The above are merely exemplary embodiments of the present invention, and those skilled in the art can make various changes or modifications to the exemplary embodiments of the present invention according to the disclosure of the present application without departing from the spirit and scope of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Claims (10)
1. A CAN bus cable, comprising:
an outer layer protection unit, inside of which an accommodation space is formed;
the reinforcing piece is arranged in the accommodating space, and two ends of the reinforcing piece are abutted to the inner side of the outer layer protection unit, so that the reinforcing piece separates the accommodating space to form a first accommodating cavity and a second accommodating cavity;
a first cable unit disposed in the first accommodation cavity;
a second cable unit disposed in the second accommodation cavity;
the first cable unit and the second cable unit are respectively embedded in the embedded concave parts on the two sides of the reinforcing member.
2. The CAN bus cable of claim 1, wherein the first cable unit comprises:
the two first conducting wires are arranged in parallel, and the respective axes of the two first conducting wires and the axis of the CAN bus cable are arranged in a coplanar manner;
a first neutral line disposed at one side of the two first conductive lines;
and the first wrapping layer is wrapped outside the two first conducting wires and the first neutral line and is made of non-hygroscopic polyester materials.
3. The CAN-bus cable of claim 2, wherein the second cable unit comprises:
the two second conducting wires are arranged in parallel, and the respective axes of the two first conducting wires, the respective axes of the two second conducting wires and the axis of the CAN bus cable are arranged in a coplanar manner;
a second neutral line provided at one side of the two second conductive lines, the first neutral line and the second neutral line being located at both sides of a plane formed by respective axes of the two first conductive lines, respective axes of the two second conductive lines, and an axis of the CAN bus cable, respectively;
and the second wrapping band layer is arranged on the outer sides of the two second conducting wires and the second neutral wire and is made of non-hygroscopic polyester materials.
4. The CAN bus cable of claim 3, wherein the first conductor comprises:
a first conductor core formed by twisting a plurality of first conductive wires made of a nickel-plated copper material;
a first insulating sleeve wrapped around an outer side of the first conductor core;
the first neutral line includes:
a second conductor core formed by twisting a plurality of second conductive wires;
and the second insulating sleeve is arranged outside the second conductor core in a wrapping mode.
5. The CAN-bus cable of claim 4, wherein the second conductor comprises:
a third conductor core stranded by a plurality of first conductor wires made of a nickel-plated copper material;
a third insulating sleeve wrapped around the outside of the third conductor core;
the second neutral line includes:
a fourth conductor core formed by twisting a plurality of second conductive wires;
and the fourth insulating sleeve is wrapped on the outer side of the fourth conductor core.
6. The CAN bus cable of claim 5, wherein the first insulating sleeve and the third insulating sleeve each comprise:
an inner insulating layer made of a low density polyethylene material such that a density of the inner insulating layer is less than or equal to 0.925g/cm3, a dielectric constant of the inner insulating layer being less than or equal to 2.33;
the middle insulating layer is wrapped on the outer side of the inner insulating layer and made of a nitrogen foaming high-density polyethylene material, so that the density of the middle insulating layer is greater than or equal to 0.94g/cm & lt 3 & gt, and the dielectric constant of the middle insulating layer is less than or equal to 2.4;
and the outer insulating layer is wrapped on the outer side of the middle insulating layer and is made of a high-density polyethylene material, so that the density of the outer insulating layer is greater than or equal to 0.94g/cm & lt 3 & gt, and the dielectric constant of the outer insulating layer is less than or equal to 2.4.
7. The CAN bus cable of claim 1, wherein the outer protection unit comprises:
the first shielding layer is wrapped on the outer sides of the reinforcing piece, the first cable unit and the second cable unit so as to shield electromagnetic interference of the external environment on the first cable unit and the second cable unit, and is made of aluminum foil;
the second shielding layer is wrapped on the outer side of the first shielding layer to shield electromagnetic interference of the external environment on the first cable unit and the second cable unit, the second shielding layer is made of tinned copper wires through cross weaving, and the first shielding layer and the second shielding layer are used for enabling the transfer impedance of the outer layer protection unit to be smaller than or equal to 20m omega/m;
the outer sheath layer is wrapped and arranged on the outer side of the second shielding layer and is made of low-smoke halogen-free flame-retardant materials.
8. The CAN bus cable of claim 1 further comprising a plurality of filler members, at least some of the filler members being disposed within the first receiving cavity with outer walls thereof abutting an outer side of the first cable unit, an inner side of the outer protective unit, and the strength members, and the remainder of the filler members being disposed within the second receiving cavity with outer walls thereof abutting an outer side of the second cable unit, an inner side of the outer protective unit, and the strength members.
9. The CAN bus cable of claim 1 wherein the strength member has a thickness of 20% to 30% of the inner diameter of the outer protective unit.
10. The CAN bus cable of claim 1 wherein the strength member is made of a flame retardant silicone rubber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222839238.6U CN218384601U (en) | 2022-10-27 | 2022-10-27 | CAN bus cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222839238.6U CN218384601U (en) | 2022-10-27 | 2022-10-27 | CAN bus cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218384601U true CN218384601U (en) | 2023-01-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222839238.6U Active CN218384601U (en) | 2022-10-27 | 2022-10-27 | CAN bus cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218384601U (en) |
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2022
- 2022-10-27 CN CN202222839238.6U patent/CN218384601U/en active Active
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