CN218586865U - Telescopic cable device, wing with telescopic cable device and airplane - Google Patents

Abstract

The utility model provides a processing is simple, the device is light, the little flexible cable device of occupation space, have this flexible cable device's wing and aircraft. The retractable cable device is provided with: a base end bracket for connection to a wing structure; a foldable telescopic part having a first link having a base end portion pivotably connected to the base end bracket via a first revolute pair and a second link having a base end portion pivotably connected to a tip end portion of the first link via a second revolute pair; the first winding box is arranged at the position of the first rotating pair; the second winding box is arranged at the position of the second revolute pair; a third connecting piece with a base end part connected to the front end part of the second connecting piece through a spherical pair, and the third connecting piece comprises a third winding box arranged on the position of the spherical pair and an extension part extending from the third winding box; a lever member having a base end portion pivotally connected to a front end portion of the extension portion via a third revolute pair; and a front end bracket for connecting the leading-edge slat, the front end portion of the lever member being fixed to the front end bracket.

Description

Telescopic cable device, wing with telescopic cable device and airplane

Technical Field

The utility model relates to a flexible cable device, wing and aircraft that have this flexible cable device belong to aircraft mechanism design field.

Background

In the arrangement of equipment in narrow spaces such as aircraft wings, the cable arrangement usually requires the installation of a retractable cable mechanism in the fixed leading-edge cabin of the wing to satisfy the electrical connection of the equipment arranged in the slat.

A known retractable cable mechanism includes a near arm rotatably connected to a wing structure and a far arm connected to the near arm via a ball joint, and the other end of the far arm is attached to a slat via a pivot joint that rotates the far arm about two orthogonal rotation axes with respect to the slat. The distal arm is made of stainless steel, for example. In the telescopic cable mechanism with the structure, the processing difficulty is high, and the manufacturing cost is high.

In addition, when the telescopic cable mechanism is additionally arranged on the mature machine type, the telescopic cable mechanism needs to be considered from the aspects of design realization, arrangement space, weight influence and the like. Therefore, how to design a cable guiding mechanism that can realize processing is simple, the device is light, occupation space is little, realizes the electrical connection of input to output non-linear formula cable in the narrow limited space of wing, and the device motion track satisfies slat motion envelope and realizes the flexible connection function has just become the technical problem that needs to solve at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a flexible cable device, wing and aircraft that have this flexible cable device can realize that processing is simple, the device is light, occupation space is little, realizes the electrical connection of input to output non-linear type cable in the narrow limited space of wing, and the device movement track satisfies slat motion envelope curve and realizes the flexonics function.

The utility model discloses a flexible cable device of form for guide flexible cable between the leading edge slat of aircraft and wing structure, a serial communication port, flexible cable device possesses: a base end bracket for connection to the wing structure; a foldable telescopic part having a first link and a second link, a base end portion of the first link being pivotably connected to the base end bracket via a first revolute pair, and a base end portion of the second link being pivotably connected to a leading end portion of the first link via a second revolute pair; the first winding box is arranged at the position of the first rotating pair; the second winding box is arranged at the position of the second revolute pair; the base end part of the third connecting piece is connected to the front end part of the second connecting piece through a spherical pair, the third connecting piece comprises a third winding box positioned at the base end part and an extension part extending from the third winding box, and the third winding box is installed on the position of the spherical pair; a lever member having a base end portion pivotally connected to a front end portion of the extension portion via a third revolute pair; and a front end bracket for connecting the leading-edge slat, the front end portion of the rod member being fixed to the front end bracket.

According to the utility model discloses a flexible cable device of form can realize that processing is simple, the device is light, occupation space is little, realizes the electrical connection of input to output non-rectilinear cable in the narrow limited space of wing, and the device motion track satisfies the slat motion envelope and realizes the flexonics function. In addition, in the same rotatable angle range, the running space and the stroke of the spherical pair are reduced, the rotating angle is reduced, and the margin is increased. In other words, the entire rotation angle can be increased. In addition, the increase of the rotation angle can be realized by the matching of the spherical pair and the third rotation pair, so that the blocking risk in the process of folding and unfolding the device can be reduced, the rod member with a simple shape can be easily used, the processability is further improved, and the manufacturing cost is reduced.

The telescopic cable device may be configured such that the rod member is formed in a tubular shape extending linearly at least when viewed from one direction, and the flexible cable passes through the inside of the rod member.

By forming the rod member to extend straight when viewed from at least one direction, the difficulty of processing the members of the retractable cable device including the rod member can be greatly reduced. And the running track is changed from a three-dimensional space to a two-dimensional plane, the moving range of the spherical pair can be greatly reduced, and the range of the space rotatable angle is enlarged.

In the retractable cable device, at least one of the first connecting member and the second connecting member may be a truss structure.

With this configuration, the retractable cord device can be made more lightweight.

In the retractable cord device, the third reel may include a first case and a second case, and the extension portion may be formed integrally with the first case.

With such a configuration, the number of components can be reduced, and the assembly workability can be improved.

In the above-mentioned retractable cable device, the third connecting member and the rod member may be made of stainless steel or titanium alloy, which can meet the requirement of an acceleration test on an aircraft.

The telescopic cable device may further include, at the spherical pair: a pin shaft supported at the front end of the second connector; the convex ball part is embedded on the periphery of the pin shaft; and a concave spherical surface portion in contact fit with the convex spherical portion, the concave spherical surface portion being mounted on the third winding box, the third winding box being configured to surround the concave spherical surface portion on an outer peripheral side of the concave spherical surface portion, the flexible cable being wound around the pin shaft by at least one turn in the third winding box.

With this configuration, the retractable cord device can be compactly configured, which contributes to further reduction in the space occupied by the device.

The utility model discloses a wing of form possesses: a wing structure; a leading-edge slat supported for movement relative to the wing structure; and the telescopic cable device of any one of the above, the telescopic cable device being connected to the wing structure and the leading-edge slat.

According to the utility model discloses a wing of a form can realize that the flexible cable device that is used for flexible cable electrical connection processes simply, the device is light, occupation space is little, and the configuration degree of freedom of other components improves in the wing.

In the wing, at least the third winding box of the folding telescopic part and the third connecting part may be located inside the wing structure.

With this configuration, the reliability of the spherical pair can be further improved, and the reliability of the retractable cable device attached to the wing can be further improved.

The utility model discloses an aircraft of a form possesses any kind of wing of at least one above-mentioned.

According to the utility model discloses an aircraft of a form can realize that the flexible cable device that is used for flexible cable electrical connection processes simply, the device is light, occupation space is little, and the configuration degree of freedom of other components improves in the aircraft wing.

The aircraft may further include an anti-icing system having components provided in the slat, the components and cables inside the wing structure being connected by the flexible cables to provide electrical connection, the flexible cables extending through the retractable cable device.

Drawings

Fig. 1 schematically shows a plan view of a retractable cable device according to an embodiment of the present invention.

Fig. 2 is an exploded perspective view of a retractable cable device according to an embodiment of the present invention.

Fig. 3 is a partial sectional view showing an enlarged periphery of the first winding case in one form.

Fig. 4 is a partial sectional view showing an enlarged periphery of a third winding case in one form.

(symbol description)

1 Telescopic cable device

2 Flexible Cable

11 basal end support

12 first connecting piece

13 second connecting piece

14 third connecting piece

15-bar member

16 first winding box

17 second winding box

18 third winding box

21 front end support

31 first rotating pair

32 second revolute pair

33 spherical pair

34 third revolute pair

181 first shell

182 second housing

P3 pin shaft

51 convex ball part

52 concave spherical surface part

Detailed Description

The present invention will be further described with reference to the following embodiments and drawings, and more details will be set forth in the following description in order to provide a thorough understanding of the present invention, but it is obvious that the present invention can be implemented in various other ways different from those described herein, and those skilled in the art can make similar generalizations and deductions according to the actual application without departing from the spirit of the present invention, and therefore, the scope of the present invention should not be limited by the contents of the embodiments.

Hereinafter, as will be described in detail, one end of each link of the retractable cable device closer to the base end bracket is referred to as a "base end side", and the other end of each link farther from the base end bracket (closer to the tip end bracket) is referred to as a "tip end side", unless otherwise specified.

Fig. 1 schematically shows a plan view of the retractable cord device 1 of the present embodiment. Fig. 2 shows an exploded perspective view of the retractable cord set 1.

The telescopic cable arrangement 1 is used to guide a flexible cable 2 between a leading edge slat (not shown) and a wing structure (not shown) of a wing of an aircraft. The wing of the aircraft includes a wing structure and a slat supported to be movable with respect to the wing structure. The cable 2 may follow the movement of the wing slat. The telescopic cable device 1 is connected with the wing structure and the leading-edge slat. The retractable cable arrangement 1 is passive and the retractable cable arrangement 1 does not drive the slat between the two positions in which it is deployed. The slats are moved relative to the wing structure by a drive mechanism, not shown. The wing structure includes, for example, skin, front wall, rear wall, spars, ribs, stringers, and stiffeners (not shown).

The base end and the front end of the telescopic cable device 1 are respectively connected with the wing structure and the leading-edge slat. The retractable cable device 1 includes, in order from the proximal end side to the distal end side: a base end bracket 11, a revolute pair, a folding telescopic part (the first link 12 is pivotally connected to the second link 13), a spherical pair, a third link 14, a revolute pair, a lever member 15, and a front end bracket 21. The movement of the link mechanism is realized through the design and the matching of the spherical pair and the revolute pair. Each bracket, the connecting piece and the rod component support and are connected with the revolute pair and the spherical pair.

The base end bracket 11 is used to attach the wing structure. The base end bracket 11 is fixed to, for example, a leading edge rib (not shown) of the wing structure when the retractable cord set 1 is mounted to the wing structure.

The collapsible telescopic section is collapsible and telescopic in a direction in which the front end thereof approaches the base end bracket 11 and a direction in which the front end thereof is away from the base end bracket 11. The folding bellows has a first link 12 and a second link 13. In the present embodiment, the first link 12 is a truss structure. As shown in fig. 2, the first link 12 is substantially rectangular in side view, and extends long from the base end side toward the tip end side. The first connecting member 12 may have a space curved shape to avoid interference of other objects on the machine, thereby saving space. The dimension of the first connector 12 in the width direction (in fig. 2, the up-down direction) perpendicular to the extending direction may be different at different positions in the extending direction of the first connector 12. In addition, the dimensions of the first connection members 12 in the thickness direction perpendicular to the extending direction and the width direction may be the same at different positions in the extending direction of the first connection members 12. However, the present invention is not limited to this, and may be appropriately adjusted according to the space in which the retractable cord device 1 is installed.

The base end portion of the first link 12 is pivotably connected to the base end bracket 11 via a first revolute pair 31. The revolute pair can pivot but not translate up and down. As shown in fig. 2, the first link 12 has a pair of ears at the base end portion on both sides in the width direction. The pair of ears have faces facing each other, and each have a hole portion through which a first pivot pin P1 described below passes. The base end bracket 11 also has a pair of lifting lugs. The pair of ears also have faces facing each other, and each have a hole portion through which the first pivot pin P1 passes.

The telescopic cable arrangement 1 has a first pivot pin P1 at the first revolute pair 31. The first pivot pin P1 passes through the pair of lifting lugs of the first link 12 and the pair of lifting lugs of the base end bracket 11, respectively. The base end portion of the first link 12 and the base end bracket 11 are connected to be pivotable with each other by a first pivot pin P1. The proximal end support 11 and the first connecting member 12 may be made of stainless steel or titanium alloy, respectively. But is not limited thereto and may be made of other known materials.

The first winding case 16 is attached to the first rotary pair 31. The winding box is a mechanism for winding and placing the cable in the process of winding and unwinding the device, and is used for protecting the cable in the relative rotation area of the two connecting pieces. The winding box may adopt a known structure. For example, the first winding case 16 includes a case 160 including a case portion 161 on one side and a case portion 162 on the other side. The housing 160 is provided to surround the first pivot pin P1 at the outer peripheral side of the first pivot pin P1. The housing 160 has a central through portion 163 through which the first pivot pin P1 extends. The flexible cable 2 is helically wound about the first pivot pin axis P1 within the first spool box 16. The flexible cable 2 extends from the base end bracket 11 to the first connector 12 in a manner spirally wound around the first pivot pin P1 axis. In this embodiment, the flexible cable 2 is wound less than one turn inside the first winding case.

The second connecting member 13 is a truss structure. As shown in fig. 2, the second link 13 is substantially rectangular in side view, and extends long from the base end side toward the tip end side. The second connector 13 may have a spatially curved shape. At different positions in the extending direction of the second link 13, the dimension in the width direction (in fig. 2, the up-down direction) perpendicular to the extending direction of the second link 13 may be different. In addition, the dimensions of the second connector 13 in the thickness direction perpendicular to the extending direction and the width direction may be the same at different positions in the extending direction of the second connector 13. However, the present invention is not limited to this, and may be appropriately adjusted according to the space in which the retractable cord device 1 is installed.

The base end portion of the second link 13 and the tip end portion of the first link 12 are pivotably connected via a second revolute pair 32. The revolute pair can pivot but not translate up and down. As shown in fig. 2, the second link 13 has a pair of ears at the base end portion on both sides in the width direction. The pair of ears have faces facing each other, and each have a hole portion through which a second pivot pin P2 described below passes. The first link 12 also has a pair of lifting lugs at the front end portion on both sides in the width direction. The pair of ears have faces opposite to each other, and have hole portions through which the second pivot pin P2 passes, respectively.

The telescopic cable arrangement 1 has a second pivot pin P2 at the second revolute pair 32. The second pivot pin axis P2 is slightly inclined with respect to the first pivot pin axis P1 toward the extending direction of the first link 12. In one example, the angle of the second pivot pin axis P2 relative to the first pivot pin axis P1 is, for example, 5 degrees. However, the present invention is not limited to this, and may be appropriately adjusted according to the space in which the retractable cord device 1 is installed. The second pivot pin P2 passes through the pair of lugs of the front end portion of the first link 12 and the pair of lugs of the base end portion of the second link 13, respectively. The front end portion of the first link 12 and the base end portion of the second link 13 are connected to be pivotable with each other by a second pivot pin P2. The second connecting member 13 may be made of stainless steel or titanium alloy. But is not limited thereto, and other known materials may be used.

A second winding case 17 is attached to the second revolute pair 32. For example, the second bobbin 17 includes a housing 170 including a housing portion 171 and a housing portion 172. The housing 170 is provided to surround the second pivot pin P2 on the outer peripheral side of the second pivot pin P2. The housing 170 has a central through portion 173 through which the second pivot pin axis P2 extends. The flexible cable 2 is helically wound around the second pivot pin P2 axis within the second winding box 17. The flexible cable 2 extends from the first connector 12 to the second connector 13 in a helically wound manner about the axis of the second pivot pin P2. In this embodiment, the flexible cable 2 is wound more than one turn inside the second winding case.

The base end of the third link 14 is connected to the tip end of the second link 13 via the spherical pair 33. The third connection 14 includes a third winding case 18 at a base end portion and an extension portion extending from the third winding case 18. The extension of the third connector 14 may be integrally formed with the third winding case 18. In addition, the extension portion of the third connection member 14 and the third winding case 18 may be formed separately and fixed to each other. The extending portion extends from the third winding case 18 toward the front end side, is formed in a U-shape in section, for example, and accommodates the flexible cable 2 inside. The extension part can be provided with a space bending shape so as to avoid the interference of other objects on the machine and save space. The third connecting member 14 may be made of stainless steel or titanium alloy. But is not limited thereto, and other known materials may be used.

The third winding box 18 is mounted at the position of the spherical pair 33. The telescopic cable arrangement 1 comprises, at the spherical pair 33: a third pin P3 supported by the distal end of the second link 13; a convex portion 51, which is fitted around the outer periphery of the third pin shaft P3, and which is fixed to the third pin shaft P3; and a concave spherical portion 52 which is in contact with and engages with the convex spherical portion 51 and has a ring shape in a plan view, and the convex spherical portion 51 and the concave spherical portion 52 rotate relative to each other. The ball portion 51 is configured to be freely rotatable but not to be axially translated up and down. The third pin P3 is slightly inclined with respect to the second pivot pin P2 in the direction of extension of the second link 13. In one example, the angle of the third pivot pin P3 relative to the second pivot pin P2 is, for example, 9.5 degrees. However, the present invention is not limited to this, and may be appropriately adjusted according to the space in which the retractable cord device 1 is installed. The second link 13 has a pair of lifting lugs at both sides in the width direction at the front end portion. The pair of ears have faces facing each other, and each have a hole portion through which the third pin shaft P3 passes. The concave spherical portion 52 is attached to the third bobbin 18, and the third bobbin is configured to surround the concave spherical portion 52 on the outer peripheral side of the concave spherical portion.

The third winding box 18 has a housing 180 including a first housing 181 and a second housing 182. In the present embodiment, the extension portion of the third link 14 is formed integrally with the first housing 181. The housing 180 is provided to surround the third pin P3 on the outer circumferential side of the third pin P3. The housing 180 has a central through portion 183 through which the third pin P3 extends. The concave spherical portion 52 is attached to, for example, the inner peripheral side wall of the center through portion 183. The flexible cable 2 is spirally wound around the third pin P3 axis inside the third winding box 18. The flexible cable 2 extends from the second connector 13 to the third connector 14 in a manner helically wound about the axis of the third pin P3. In this embodiment, the flexible cable 2 is wound more than one turn inside the third bobbin.

The base end portion of the lever member 15 is pivotably connected to the front end portion of the extension portion of the third link 14 via a third revolute pair 34. The revolute pair can pivot but not translate up and down. In the present embodiment, the rod member 15 is formed in a two-dimensional curved shape. The shaft member 15 is formed in a tubular shape extending straight (see fig. 1) when viewed from at least one direction, and the flexible cable passes through the inside of the shaft member. For example, the rod member 15 is bent with a small curvature (curvature) when viewed from a direction perpendicular to a direction in which the rod member 15 is viewed to extend straight. The rod member may be made of stainless steel or titanium alloy. But is not limited thereto, and other known materials may be used.

The telescopic cable arrangement 1 has a fourth pivot pin P4 at the third revolute pair 34. The third link 14 and the lever member 15 are connected to be pivotable with each other by a fourth pivot pin P4. The fourth pivot pin P4 is slightly inclined with respect to the third pin P3, for example, inclined towards the extension of the third link 14. In one example, the angle of the fourth pivot pin axis P4 relative to the third pivot pin axis P3 is, for example, 10.8 degrees. However, the present invention is not limited to this, and may be appropriately adjusted according to the space in which the retractable cord device 1 is installed. The flexible cable 2 extends from the third link 14 toward the front end side along the U-shaped cross-sectional receiving portion of the extending portion, passes around the outer peripheral side of the fourth pivot pin P4, and penetrates into the inside of the tubular lever member 15. The flexible cable 2 extends from the third link 14 to the lever member 15 in such a manner as to pass around the fourth pivot pin P4.

In the present embodiment, the foldable telescopic part and the third connection part 14 are located inside the wing structure. The bar elements 15 are configured to be connected to the slat active face at regular intervals through apertures in the wing structure.

The front bracket 21 is used to attach a leading-edge slat. The front end bracket 21 is fixed to, for example, a slat cross member (not shown). The front end portion of the rod member 15 is fixed to the front end bracket 21 by a fastener such as a screw.

An aircraft to which the retractable cord device of the present disclosure is applied may further be provided with an anti-icing system (not shown). The anti-icing system is provided with components arranged on the leading edge slat, the components and cables inside the wing structure are connected through flexible cables 2, and the flexible cables 2 extend through the telescopic cable device 1.

When the retractable cable device 1 is installed on the wing structure, for example, holes are formed on the leading-edge rib plate and the slat structure fixed on the wing structure; the telescopic cable device is fixed through fasteners such as bolts, nuts and the like, one end (a base end bracket 11) is fixed on the fixed leading edge rib plate, and the other end (a front end bracket 21) is fixed on the slat structure; and finally, connecting the cable connector of the telescopic cable device 1 with components of an anti-icing system, and connecting the other end of the telescopic cable device with a cable inside the wing. When the slat is deployed, the retractable cable arrangement 1 follows the slat (not shown).

For example, when the slat is lowered, the force (toward the heading) for lowering the slat is transmitted to the end of the front bracket 21 on the telescopic cable device, and is transmitted to the spherical pair 33 through the rod member 15, and when the spherical pair moves, the force is transmitted to the revolute pair 32 through the truss, and the movement of the revolute pair 32 drives the other truss, and the revolute pair 31 also moves. When the slat is lowered, the lowering force drives the winding box on the spherical pair to rotate around the pin shaft P3, the winding box on the revolute pair 32 rotates around the pin shaft P2, and the winding box on the revolute pair 31 rotates around the pin shaft P1, so that the movement of the cable is driven to be folded and unfolded. When the slat is retracted, the force (reverse heading) on the rod member 15 pushes back on the spherical pair, and the motion principle is the same as the lowering process.

According to the retractable cord device 1 of the present disclosure, the retractable cord device includes: a folding telescopic part having a first link 12 having a base end portion pivotably connected to a base end bracket 11 connected to the wing structure via a first revolute pair 31 and a second link 13 having a base end portion pivotably connected to a tip end portion of the first link 12 via a second revolute pair 32; a first winding box 16 arranged at the position of the first rotating pair and a second winding box 17 arranged at the position of the second rotating pair; a third link 14 having a base end connected to the front end of the second link 13 via a spherical pair 33, and including a third winding case 18 attached to the spherical pair 33 and an extension extending from the third winding case 18; and a lever member 15 having a base end portion pivotally connected to a front end portion of the extension portion of the third link 14 via a third revolute pair 34, and a front end portion of the lever member 15 fixed to a front end bracket 21 connected to the slat. By forming the telescopic cable device 1, the electric connection from the input end to the output end of a nonlinear cable can be realized in a narrow and limited space of a wing, and the movement track of the device meets the requirement of slat movement envelope and realizes the flexible connection function. Further, by providing the spherical pair 33 (ball joint) between the foldable telescopic part and the third link 14 and the third revolute pair 34 between the third link 14 and the lever member 15, the running space and stroke of the ball joint are reduced, the revolute angle is reduced, and the margin is increased in the same range of the revolute angle. In other words, the entire rotation angle can be increased. Is effective when used in a wing area on an aircraft where space is limited. Further, since the engagement between the spherical pair 33 (ball joint) and the third revolute pair 34 can increase the rotation angle, the lever member 15 having a simple shape can be easily used (for example, the connecting rod curvature can be easily reduced), the workability can be further improved, and the manufacturing cost can be reduced. In addition, the rotation angle margin of the ball joint is increased, the probability of mechanism locking is reduced, and the risk of breakage of fasteners such as rotating shafts, screws and the like is reduced.

Preferably, the rod member 15 is formed to extend straight when viewed from at least one direction, whereby the curved shape of the rod member is changed from three-dimensional to two-dimensional, for example, as compared with a case where the rod member is formed in a three-dimensional curved shape curved when viewed from all directions, and the difficulty in processing the members of the retractable cable device 1 including the rod member 15 can be greatly reduced. And the moving track is changed from a three-dimensional space to a two-dimensional plane, the moving range of the ball joint is greatly reduced, and the rotatable angle range of the space is enlarged.

In addition, the ball joint is arranged in the fixed wing (wing structure), so that the rotation angle of the ball joint is increased, and the reliability of the ball joint is further improved. When the flexible cable is connected to a component (for example, an anti-icing sensor) of an anti-icing system at the slat by the retractable cable device, the reliability of the electrical connection of the anti-icing sensor at the slat can be improved.

The telescopic cable device disclosed by the invention can be additionally arranged on an already-mature machine type. In addition, in actual operation, the shape, the fastener position, and the specification strength of the base end bracket 11 can be comprehensively designed according to the available space at the rib plate of the leading edge of the wing, and based on many factors such as the aerodynamic load borne by the retractable cable device 1, the acceleration load at the mechanism installation position, and the installation and removal requirements of the device. The front end bracket 21 can be determined according to the installation mode of a cable on the movable surface of the slat in the telescopic cable device, and can be designed cooperatively with the slat structure.

The embodiments of the present invention have been described above, but the scope of the present invention is not limited to the above description, and various modifications can be added within a range not departing from the gist of the present invention. Further, the embodiments and the modifications thereof can be arbitrarily combined as appropriate.

Claims (10)

1. A retractable cable arrangement for guiding a flexible cable between a leading-edge slat and a wing structure of an aircraft,

the retractable cable device is provided with:

a base end bracket for connection to the wing structure;

a foldable telescopic part having a first link and a second link, a base end portion of the first link being pivotably connected to the base end bracket via a first revolute pair, and a base end portion of the second link being pivotably connected to a leading end portion of the first link via a second revolute pair;

the first winding box is arranged at the position of the first rotating pair;

the second winding box is arranged at the position of the second revolute pair;

the base end part of the third connecting piece is connected to the front end part of the second connecting piece through a spherical pair, the third connecting piece comprises a third winding box positioned at the base end part and an extension part extending from the third winding box, and the third winding box is installed on the position of the spherical pair;

a lever member having a base end portion pivotally connected to a front end portion of the extension portion via a third revolute pair; and

a front end bracket for connection to the leading-edge slat, the front end portion of the rod member being fixed with the front end bracket.

2. The retractable cord arrangement of claim 1,

the shaft member is formed in a tubular shape extending linearly at least when viewed from one direction, and the flexible cable passes inside the shaft member.

3. The retractable cord arrangement of claim 1 or 2,

at least one of the first connecting member and the second connecting member is a truss structure.

4. The retractable cord arrangement of claim 1 or 2,

the third winding box comprises a first shell and a second shell, and the extension part is integrally formed with the first shell.

5. The retractable cord arrangement of claim 1 or 2,

the third connecting member and the rod member are made of stainless steel or titanium alloy.

6. The retractable cord arrangement of claim 1 or 2,

the telescopic cable arrangement comprises at the spherical pair: a pin shaft supported at the front end of the second connector; the convex ball part is embedded on the periphery of the pin shaft; and a concave spherical part in contact fit with the convex spherical part,

the concave spherical portion is attached to the third bobbin, the third bobbin is configured to surround the concave spherical portion on an outer peripheral side of the concave spherical portion,

and in the third winding box, the flexible cable is wound around the pin shaft for at least one circle.

7. A wing of an aircraft, characterized in that,

the disclosed device is provided with: a wing structure; a leading-edge slat supported for movement relative to the wing structure; and a telescopic cable arrangement according to any of claims 1 to 6, connected with the wing structure and the leading-edge slat.

8. The wing as claimed in claim 7,

the folding telescopic part and at least the third winding box of the third connecting piece are positioned inside the wing structure.

9. An aircraft, characterized in that it comprises, in a plane,

provided with at least one wing according to claim 7 or 8.

10. The aircraft of claim 9,

the aircraft further comprises an anti-icing system, wherein the anti-icing system is provided with components arranged on the leading-edge slat, the flexible cables are connected with the components and cables inside the wing structure to provide electrical connection, and the flexible cables extend through the telescopic cable device.

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