CN215908321U - Drag chain for guiding a wire harness between two connection points that are movable relative to each other - Google Patents
Drag chain for guiding a wire harness between two connection points that are movable relative to each other Download PDFInfo
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- CN215908321U CN215908321U CN202121647119.XU CN202121647119U CN215908321U CN 215908321 U CN215908321 U CN 215908321U CN 202121647119 U CN202121647119 U CN 202121647119U CN 215908321 U CN215908321 U CN 215908321U
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- links
- wire harness
- guiding
- side link
- hinge pin
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Abstract
A tow chain for guiding a wire harness between two connection locations which are moved relative to each other, comprising a plurality of links connected to each other, wherein the links have two side link plates and at least one transverse web interconnecting the two side link plates, wherein each side link plate has a hinge pin and an aperture integrally formed therewith, the links being interconnected by cooperation of mutually corresponding hinge pins and apertures of side link plates of adjacent links; wherein the hinge pin has a rotating shaft portion and a stopper portion, and the aperture has a rotating shaft hole portion and a stopper hole portion which are fitted with the rotating shaft portion and the stopper portion, respectively; wherein, when a plurality of links connected to each other are arranged horizontally along their longitudinal axes, the stopper portion and the stopper hole portion cooperate to allow the links to rotate in a first direction and restrict the rotational angle thereof, but restrict the links from rotating in a second direction opposite to the first direction.
Description
Technical Field
The utility model relates to a drag chain for guiding a wire harness (e.g. a cable, a wire or a hose, etc.) between two relatively movable connection points, comprising a plurality of chain links connected to each other.
Background
This type of tow chain is typically used to guide and (to some extent) protect a wiring harness, such as a cable, wire or hose, passing therethrough from a fixed connection location to a movable connection location for reciprocation between the two locations. However, the drag chain structure of the prior art is not well applicable to a scene (e.g., a console box of a vehicle) where a space is narrow and limited, and there are problems of jamming, loosening of links, etc. during the back and forth reciprocating movement between two connection positions.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the present invention is to provide a drag chain suitable for use in a narrow limited space, and the drag chain has a smooth and unsmooth motion process in the narrow limited space.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
constructing a drag chain for routing a wire harness between two connection locations that are moved relative to each other, comprising a plurality of links connected to each other, wherein the links have two side link plates and at least one transverse web interconnecting the two side link plates, wherein each side link plate has a hinge pin and an aperture integrally formed therewith, the links being interconnected by the cooperation of the mutually corresponding hinge pins and apertures of the side link plates of adjacent links; wherein the hinge pin has a rotating shaft portion and a stopper portion, and the aperture has a rotating shaft hole portion and a stopper hole portion which are fitted with the rotating shaft portion and the stopper portion, respectively; wherein, when a plurality of links connected to each other are arranged horizontally along their longitudinal axes, the stopper portion and the stopper hole portion cooperate to allow the links to rotate in a first direction and restrict the rotational angle thereof, but restrict the links from rotating in a second direction opposite to the first direction.
The drag chain according to the present invention makes the structure of the drag chain (link) with a rotation limiting mechanism more compact, more convenient and reliable to install and more cost-effective by the links comprising the novel (shaped) mutually fitting hinge pin and aperture, in particular by the integrated (integrally molded) pivot part and stop part and pivot hole part and stop hole part, and allows the unidirectional rotation of two adjacent links and limits the angle of the unidirectional rotation (but limits the rotation in the opposite direction, i.e. the rotation beyond the horizontal when facing the opposite direction) by the rotation limiting mechanism, thereby enabling the drag chain according to the present invention to be adapted for application in narrow confined spaces and to move smoothly and without jamming in such narrow confined spaces.
According to an aspect of the present invention, the stopper portion is an elongated projection extending from the rotation shaft portion, wherein the rotation of the link is restricted by abutment of the elongated projection with a hole wall of the stopper hole portion.
According to one aspect of the utility model, the rotation angle of the links is less than 90 degrees, for example 60 degrees.
According to one aspect of the utility model, there is a cambered surface between the aperture of each side link plate of one link and the hinge pin that is non-concentric with the pivot portion of the hinge pin.
According to one aspect of the present invention, R-angles are provided at both edges of the arc between the aperture of each side link plate of one link and the hinge pin.
According to an aspect of the present invention, the wire harness is a power harness for an in-vehicle refrigerator placed in a vehicle console box, wherein one end of a tow chain for guiding the in-vehicle refrigerator power harness is mounted to a drawer of the vehicle console box via a tow chain joint.
According to one aspect of the utility model, the tow chain joint comprises a hinge pin having a pivot portion and a stop portion, and a fixing portion.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic perspective view of two connected links according to the present invention;
FIG. 2 is a side view of two connected links of FIG. 1;
FIG. 3 is a schematic view of two links being rotated in a first direction by a limiting mechanism to limit the angle of rotation;
FIG. 4 is a schematic view of two links being restrained from rotating beyond horizontal toward a second direction by a restraining mechanism;
FIG. 5 is a schematic perspective view of a drag chain including a plurality of links and joints connected to each other according to the present invention;
fig. 6A and 6B are schematic structural views of a tow chain according to the present invention guiding a wire harness between two connection positions moved relative to each other.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
Referring first to figures 1 and 2 and also to figures 3 to 4, the link 1 has two mirror-symmetrical lateral link plates 11 and at least one transverse web 12 interconnecting the two lateral link plates 11. The side link plate 11 has the hinge pin 13 and the aperture 14 integrally molded therewith, for example, the outer link plate portion 111 of the side link plate 11 has the aperture 14 and the inner link plate portion 112 of the side link plate 11 has the hinge pin 13. The hinge pin 13 comprises a substantially cylindrical shaft portion 15 and a stopper portion 16 in the form of an elongated boss extending from a side of the cylindrical shaft portion; the orifice 14 includes a spindle hole portion 17 and a stopper hole portion 18. The articulated connection of adjacent links is achieved by receiving the hinge pin 13 of the previous link in the aperture 14 of the next link, i.e. the pivot portion 15 in the pivot hole portion 17 and the stop portion 16 in the stop hole portion 18. When the links 2 are connected to each other and arranged horizontally along their own longitudinal axis S (i.e., arranged in an orientation parallel to the longitudinal axis S), the stops 16 abut against the first aperture walls 181 of the stop aperture portions 18 and away from the second aperture walls 182 of the stop aperture portions 18, which allows the links 2 to rotate in the first direction D1 until the stops 18 abut against the second aperture walls 182 (i.e., allows rotation in the first direction and limits the angle of rotation in the first direction), but limits rotation of the links 2 in a second direction D2 opposite the first direction D1 (i.e., limits rotation in the second direction D2 beyond a horizontal condition parallel to the longitudinal axis S). The structure of the drag chain (chain link) with the rotation limiting mechanism is more compact through the integrated rotating shaft part and the stopping part as well as the rotating shaft hole part and the stopping hole part, and limited unidirectional rotation is realized through the limiting mechanism, so that the drag chain provided by the utility model can be suitable for being applied to a narrow limited space and can move smoothly without being blocked in the narrow limited space.
Such a narrow limited space may be, for example, a vehicle console box, in which the tow chain according to the present invention may be applied for guiding a reciprocating motion of a power harness of an in-vehicle refrigerator when drawing out and pushing in a console box drawer. For example, referring schematically to fig. 6A and 6B and also to fig. 5, a tow chain according to the present invention has a tow chain joint 2 attached to one end, where the joint 2 has the same pivot and stop arrangement as the hinge pin of the chain link to mate with the aperture of the chain link. The joint 2 further comprises a fixing portion 21 by which one end of the tow chain can be mounted to a drawer of the vehicle console box via a fixing mechanism 22 such as a screw, a snap, a strap, etc.; the power supply harness 3 of the vehicle-mounted refrigerator is threaded into the drag chain, and one end of the power supply harness is connected with the vehicle-mounted refrigerator, so that a use/application structure with corners is formed, wherein the use/application structure is schematically shown in fig. 6A. By the unidirectional rotation with the limited angle achieved by the stopper portion and the stopper hole portion, the range of the corner portion shown in the drawings can be effectively controlled, thereby ensuring that the drag chain according to the present invention can be applied to a console box with limited space and the reciprocating process in the drawer extracting and pushing-in direction in such narrow space is smooth and not stuck (which in turn can also avoid excessive wear on the drag chain). Additionally or alternatively, the tow chain according to the utility model may also be applied to other moving track scenarios than a vehicle armrest box, such as a robotic arm or the like.
Additionally or alternatively, in an alternative embodiment, the rotation limiting angle of the links may be defined by providing an angle between the first and second bore walls 181, 182 of the stop bore portion 18. For example, the rotation angle of the link may be limited to less than 90 degrees, such as 60 degrees, by providing an angle between the first aperture wall 181 and the second aperture wall 182. Such exemplary limiting angles enable a better control of the range of the corner portions, thereby ensuring that the tow chain according to the utility model can be better adapted to narrow confined spaces, such as vehicle armrest boxes.
In an alternative embodiment of the utility model, there is a circular arc surface 19 between the aperture 14 of each side link plate 11 of the link 1 and the hinge pin 13, which circular arc surface 19 can also be considered as being located on the front side of the overlapping area of two adjacent links. In order to avoid that the circular arc surface blocks the normal rotation of the chain link, the circular arc surface 19 is of a design that is non-concentric with the pivot portion 15 of the hinge pin, as shown for example in fig. 2 and 3.
Additionally or alternatively, in another alternative embodiment, there is a smooth or radiused transition, such as an R-angle (as shown in fig. 1 or 5), at both edges 191 of the radiused surface 19 between the aperture 14 and the hinge pin 13 of each side link plate of the link 1; this avoids the edge 191 scratching the operator when mounting the tow chain to the running track.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation configuration and operation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make combinations, changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention.
Claims (8)
1. A tow chain for guiding a wire harness between two connection locations which are moved relative to each other, comprising a plurality of links connected to each other, wherein the links have two side link plates and at least one transverse web interconnecting the two side link plates, wherein each side link plate has a hinge pin and an aperture integrally formed therewith, the links being interconnected by cooperation of mutually corresponding hinge pins and apertures of side link plates of adjacent links; wherein the hinge pin has a rotating shaft portion and a stopper portion, and the aperture has a rotating shaft hole portion and a stopper hole portion which are fitted with the rotating shaft portion and the stopper portion, respectively; wherein, when a plurality of links connected to each other are arranged horizontally along their longitudinal axes, the stopper portion and the stopper hole portion cooperate to allow the links to rotate in a first direction and restrict the rotational angle thereof, but restrict the links from rotating in a second direction opposite to the first direction.
2. The tow chain for guiding a wire harness between two connection positions moving relative to each other according to claim 1, wherein the stopper portion is an elongated protrusion extending from the rotation shaft portion, wherein rotation of the link is restricted by abutment of the elongated protrusion with a hole wall of the stopper hole portion.
3. Drag chain for guiding a wire harness between two connection positions moving relative to each other according to claim 1 or 2, characterized in that the rotation angle of the chain links is less than 90 degrees.
4. Drag chain for guiding a wire harness between two connection positions moving relative to each other according to claim 3, characterized in that the rotation angle of the chain links is 60 degrees.
5. A drag chain for routing a wire harness between two connection positions moving relative to each other according to claim 1 or 2, characterized in that between the aperture of each side link plate of one link and the hinge pin there is an arc non-concentric with the pivot portion of the hinge pin.
6. Drag chain for guiding a wire harness between two connection positions moving relative to each other according to claim 1 or 2, characterized in that an R-angle is provided at both edges of the arc between the aperture of each side link plate of one link and the hinge pin.
7. The tow chain for guiding a wire harness between two connection positions moving relative to each other according to claim 1 or 2, wherein the wire harness is a power harness for an in-vehicle refrigerator placed in a vehicle console box, wherein one end of the tow chain for guiding the in-vehicle refrigerator power harness is mounted to a drawer of the vehicle console box via a tow chain joint.
8. The tow chain for routing a wire harness between two connection locations that move relative to each other according to claim 7, wherein the tow chain joint comprises a hinge pin having a pivot portion and a stop portion and a fixed portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121647119.XU CN215908321U (en) | 2021-07-19 | 2021-07-19 | Drag chain for guiding a wire harness between two connection points that are movable relative to each other |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121647119.XU CN215908321U (en) | 2021-07-19 | 2021-07-19 | Drag chain for guiding a wire harness between two connection points that are movable relative to each other |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215908321U true CN215908321U (en) | 2022-02-25 |
Family
ID=80289576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121647119.XU Active CN215908321U (en) | 2021-07-19 | 2021-07-19 | Drag chain for guiding a wire harness between two connection points that are movable relative to each other |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215908321U (en) |
-
2021
- 2021-07-19 CN CN202121647119.XU patent/CN215908321U/en active Active
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