TW202043633A - Cable sheath for vehicle - Google Patents

Abstract

A cable sheath for a vehicle is provided, including: an inner tube; a metal layer, including a plurality of wires disposed around a periphery of the inner tube; a first annular layer, disposed around the metal layer, a second annular layer, disposed around the first annular layer; wherein the plurality of wires are radially embedded within the first annular layer.

Description

Catheters for vehicles

The invention relates to a catheter for a vehicle.

The operating wire set used for brake cables or shifting cables of general vehicles (such as bicycles or motorcycles) includes a catheter and an inner wire. The inner wire is threaded through the inner wire so that the inner wire can slide in the inner space of the catheter, and provides moisture and resistance. Impact and other effects to protect the inner line.

The catheter structure generally includes an inner tube, a metal layer, and an outer layer. The conventional outer layer is mostly a layered structure composed of plastic material, which covers the outer circumference of the metal layer to prevent internal components from being damaged due to the environment or other external forces. However, the metal layer will be deformed during the operation of the wire set, causing the outer layer covering the surface of the metal layer to be pulled, and the conventionally used outer layer and the metal layer have insufficient bonding strength and the strength of the material used Poor, it will often cause the outer layer to peel off the metal layer, crack or wear under long-term use, and can no longer be used.

Therefore, it is necessary to provide a novel and advanced vehicle catheter to solve the above-mentioned problems.

The main purpose of the present invention is to provide a catheter for a vehicle, which has better strength against external forces and better durability.

In order to achieve the above object, the present invention provides a vehicle catheter, including: an inner tube; a metal layer, including a plurality of wires arranged on the outer circumference of the inner tube; a first ring layer, ringed outside the metal layer; The second ring layer is ringed outside the first ring layer; wherein the plurality of wires are partially embedded in the first ring layer radially.

The following examples are only used to illustrate the possible implementation aspects of the present invention, but they are not intended to limit the scope of protection of the present invention, and are described first.

Please refer to FIGS. 1 to 2, which show a first preferred embodiment of the present invention. The vehicle catheter 1 of the present invention includes an inner tube 10, a metal layer 20, a first ring layer 30, and a second ring layer 40 .

The inner tube 10, for example, is provided with a core wire (such as but not limited to a brake wire, a transmission wire, and a throttle wire) movably passed through; the metal layer 20 includes a plurality of wires 21 arranged on the outer periphery of the inner tube 10; the first ring The layer 30 is ringed outside the metal layer 20; the second ring layer 40 is ringed outside the first ring layer 30; wherein, the plurality of wires 21 are partially embedded in the first ring layer 30 radially, whereby the first ring layer 30 A ring layer 30 can be stably joined to the metal layer 20.

The depth of each of the wires 21 radially embedded into the first ring layer 30 is not less than 1/2 of the average thickness of the first ring layer 30. When the metal layer 20 is bent or twisted by force, the metal layer 20 and The first ring layer 30 is embedded and connected, and the deformation of the plurality of wires 21 can be effectively controlled within a preferable range. A gap 22 is formed between adjacent two of the plurality of wires 21, which can provide the required movement margin when the vehicle catheter 1 is bent; the first ring layer 30 is partially embedded in each of the gaps 22, and the bonding degree is better. The uniform arrangement position of the plurality of wires 21 can be maintained, and the direct contact, extrusion, deformation and damage of the plurality of wires 21 can also be avoided. Of course, the plurality of wires can also be arranged in contact. In detail, the metal layer 20 can be formed by a single-layer arrangement or a multi-layer stacking of the plurality of wires 21, and the radial dimensions of the plurality of wires 21 can be the same or different, and can be configured and selected according to different requirements.

With reference to Figure 2, the average thickness of the first ring layer 30 is not greater than 1/2 of the maximum thickness of the metal layer 20; the average thickness of the second ring layer 40 is not greater than the maximum thickness of the metal layer 20; the second The average thickness of the ring layer 40 is not less than the average thickness of the first ring layer 30. With the cooperation of the thickness of each layer and the radial depth of the plurality of wires 21 embedded in the first ring layer 30, the catheter 1 can have a smaller tube diameter and the bonding strength of each layer is good, easy to bend while maintaining a certain rigidity. Of course, the first and second ring layers and the metal layer can also be configured to other thicknesses according to the properties of the materials used and production requirements.

In the second preferred embodiment of the present invention, each of the wires 21 is radially embedded in the first ring layer 30 and is in contact with the second ring layer 40, as shown in FIG. 3, which can also increase the degree of bonding and maintain the plural The location of the wire 21.

As shown in the third preferred embodiment shown in FIG. 4, each of the wires 21 is further embedded in the second ring layer 40 radially, and the depth of each of the wires 21 embedded in the second ring layer 40 is not less than that of the second ring layer 40 1/3 of the average thickness, good bonding strength. The materials of the first and second ring layers 30, 40 can be selected according to requirements. For example, the first ring layer 30 is pulled by the plurality of wires 21 to a higher degree, so a material with greater toughness can be selected. The second ring layer 40 can be selected from the same material as the first ring layer 30 or a material with better strength, which can be stably joined to the metal layer 20 and has better strength against external forces.

In detail, the first ring layer 30 can be a polypropylene (Polypropylene, PP) polymer, and the second ring layer 40 can be a PP polymer that is different from the first ring layer 30, which has better resistance to external forces. characteristic. Preferably, the toughness of the first ring layer 30 is greater than that of PP homopolymer (Homopolymer), for example but not limited to ethylene propylene rubber (Ethylene Propylene Rubber, EPR), which can be pulled by each of the wires 21 without being easily broken and resistant Good impact; the strength of the second ring layer 40 is greater than that of PP monomer, for example, but not limited to a polypropylene random copolymer (Polypropylene Random Copolymer) material, which has good strength and can protect internal components from damage. Among them, "toughness" refers to the strength that a material can tolerate when it is stressed until it breaks; "strength" refers to the ability of a material to resist damage when subjected to external forces; the evaluation indicators of "toughness" and "strength" include impact resistance (Impact The consideration of the mechanical properties of at least one of Strength, Yield Strength, Tensile Strength and Young's modulus.

1: Catheter 10: Internal management 20: Metal layer 21: Wire 22: gap 30: First ring layer 40: second ring layer

Figure 1 is a perspective view of the first preferred embodiment of the present invention. Figure 2 is a cross-sectional view of the first preferred embodiment of the present invention. Figure 3 is a cross-sectional view of a second preferred embodiment of the present invention. Figure 4 is a cross-sectional view of a third preferred embodiment of the present invention.

1: Catheter

10: inner tube

20: Metal layer

30: First ring layer

40: second ring layer

Claims (9)

A catheter for a vehicle, including: An inner tube A metal layer, including a plurality of wires arranged on the outer circumference of the inner tube; A first ring layer, ringed outside the metal layer; A second ring layer, ringed outside the first ring layer; Wherein, the plurality of wires are partially embedded in the first ring layer radially. The catheter for a vehicle according to claim 1, wherein the depth of each of the wires radially embedded in the first ring layer is not less than 1/2 of the average thickness of the first ring layer. The catheter for a vehicle according to claim 1, wherein each of the wires is in contact with the second ring layer. The catheter for a vehicle according to claim 1, wherein each of the wires is further embedded in the second ring layer radially, and the depth of each of the wires embedded in the second ring layer is not less than 1/ of the average thickness of the second ring layer 3. The vehicle catheter according to claim 1, wherein the average thickness of the first ring layer is not more than 1/2 of the maximum thickness of the metal layer. The vehicle catheter according to claim 1, wherein the average thickness of the second ring layer is not greater than the maximum thickness of the metal layer. The catheter for a vehicle according to claim 1, wherein a gap is formed between adjacent two of the plurality of wires. The catheter for a vehicle according to claim 1, wherein the average thickness of the second ring layer is not less than the average thickness of the first ring layer. The vehicle catheter according to claim 2, wherein the average thickness of the first ring layer is not greater than 1/2 of the maximum thickness of the metal layer; the average thickness of the second ring layer is not greater than the maximum thickness of the metal layer; A gap is formed between adjacent two of the plurality of wires; the first ring layer is partially embedded in each gap; the average thickness of the second ring layer is not less than the average thickness of the first ring layer; the first ring layer is Polypropylene (PP) polymer, the second ring layer is a PP polymer that is different from the first ring layer; the toughness of the first ring layer is greater than the homopolymer of PP, the first ring layer The strength of the bicyclic layer is greater than that of the PP monomer.

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