Cable turnover device

Abstract

The utility model relates to a cable turnover device, which is arranged above a cable outlet, and comprises two supports which are fixed above a cable groove, the two supports are oppositely arranged, and the supports are provided with screw holes for a cable to pass through; the rotating body transversely penetrates through the two supports, and the rotating body is located above the rotating hole. The cable turnover device provided by the utility model can reduce the friction force between the cable and the cable outlet.

Description

Technical Field

[0001] This utility model belongs to the field of crane applications, specifically a cable turning device. Background Technology

[0002] Rail-mounted cranes are currently used in many scenarios such as ports. They are typically powered by either fixed cable reels or mobile cable chains. Both of these power supply methods rely on the flexible layout and efficient transmission of cables.

[0003] Cables serve the purpose of transmitting power and signals, providing power to cranes, control systems, sensors, etc., and transmitting operating instructions and real-time data (such as position and load information). In addition, cables must also have high bending resistance to adapt to repeated bending caused by frequent crane movement. It can be seen that cables are not only a carrier of power transmission, but also need to meet special requirements such as dynamic movement and environmental adaptability.

[0004] When using cable reel power supply, a narrow cable trench is installed on the ground to protect the cable. Since the crane's operating range is generally quite long, this cable trench typically covers the entire operating range. The crane's cable reel can usually rotate in both directions; therefore, the cable is generally positioned at the midpoint of the crane's operating range when energized, achieving full coverage of the entire operating range. However, when the crane passes this energization point, the cable undergoes a reversal process within the cable trench, necessitating the design of a cable reversing device.

[0005] In existing technology, a ground cable guide is usually set up. When the crane passes through this position, it will drag the cable from left to right or from right to left. The force transmitted from the crane to the cable is relatively large, which results in a large frictional force when the cable rubs against the ground cable guide. Over time, this may wear down the cable. Utility Model Content

[0006] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a cable reversing device that can reduce the friction between the cable and the cable outlet.

[0007] The technical solution of this utility model is as follows:

[0008] A cable reversing device is disposed above a cable outlet. The cable reversing device includes: a bracket fixed above a cable trench, two brackets being arranged opposite each other, each bracket having a swivel hole for the cable to pass through; and a rotating body that traverses the two brackets and is located above the swivel hole.

[0009] Preferably, the centerline of the rotating body is perpendicular to the centerline of the spiral hole.

[0010] Preferably, the cable flipping device includes a cable clamp for clamping the cable.

[0011] Preferably, the cable flipping device includes a clamping member for clamping the cable clamp.

[0012] Preferably, the cable clamp is provided with a protective sleeve to protect the cable.

[0013] Preferably, the cable clamp consists of two semicircular parts, with mounting platforms provided on the outer sides of both ends of the semicircular parts. The clamping member is detachably connected to the mounting platform, and the clamping member adjusts the contact gap between the mounting platforms.

[0014] Preferably, the outer side of the bracket is arc-shaped.

[0015] Preferably, the bracket has a support structure on its side.

[0016] This application provides a cable reversing device, which is disposed above the cable outlet. The cable reversing device includes: a bracket, which is fixed above the cable trench, with two brackets arranged opposite each other, and each bracket having a rotating hole for the cable to pass through; and a rotating body, which traverses the two brackets and is located above the rotating hole. By shifting the cable reversing point from inside the traditional ground trench to above the cable outlet, the cable reversal is achieved through the coordinated operation of the rotating body and the bracket. When the crane moves, the cable tension drives the rotating body to rotate around the rotating hole on the bracket. The cable reversal process is changed from the traditional "sliding friction" to "rolling friction" (through the rotation of the rotating body). As the rotating body rotates around the axis of the bracket, the rigid friction between the cable and the device is reduced by dynamically adjusting the cable angle. Attached Figure Description

[0017] Figure 1 A schematic diagram of the right side of the cable reversing device provided by this utility model;

[0018] Figure 2 This is a schematic diagram of the cable reversing device in this utility model from another direction;

[0019] Figure 3 This is a schematic diagram of the left side of the cable reversing device in this utility model.

[0020] Explanation of reference numerals in the attached figures

[0021] 1. Bracket; 11. Rotary hole; 2. Rotating body; 3. Cable clamp; 4. Clamping element; 5. Protective sleeve; 6. Support structure. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0023] In the description of this utility model, it should be understood that the terms "upper" and "lower" indicate orientation or positional relationship only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Figures 1 to 3 As shown, this utility model provides a cable reversing device. The cable reversing device is set above the cable outlet. The cable reversing device includes: a bracket 1, which is fixed above the cable trench. Two brackets 1 are arranged opposite each other. The bracket 1 is provided with a rotating hole 11 for the cable to pass through; and a rotating body 2, which passes through the two brackets 1 and is located above the rotating hole 11.

[0025] In the existing technology, because the arc section of the cable is long and the cable itself is heavy, when the crane passes through this position, it will drag the cable from left to right or from right to left. The force transmitted from the crane to the cable is large, which results in a large friction when the cable rubs against the ground. Over time, this may wear down the cable.

[0026] The cable reversing device provided in this application moves the cable reversing point from inside the traditional ground trench to above the cable outlet. The cable reversal is achieved through the coordinated operation between the rotating body 2 and the support 1. When the crane moves, the cable tension drives the rotating body 2 to rotate around the rotating hole 11 on the support 1. The cable reversal process is changed from the traditional "sliding friction" to "rolling friction" (through the rotation of the rotating body 2). When the rotating body 2 rotates around the axis of the support 1, the rigid friction between the cable and the device is reduced by dynamically adjusting the cable angle.

[0027] Specifically, the bracket 1 is fixed above the cable trench and arranged symmetrically, with two brackets 1 facing each other to form a stable portal frame structure. This layout distributes the supporting force of the bracket 1 along both sides of the cable trench, avoiding the torque imbalance caused by traditional single-sided support. Furthermore, the rotating hole 11 ensures that the rotation path of the rotating body 2 is consistent with the cable reversing path. Simultaneously, the cable reversing device provided in this application is an above-ground installation structure, with the bracket 1 fixed above the cable trench. This facilitates maintenance personnel's observation of the cable reversing device's status from the bracket 1, solving the problem of difficult maintenance associated with traditional cable reversing devices.

[0028] In the embodiments provided in this application, the centerline of the rotating body 2 is perpendicular to the centerline of the spiral hole 11. It should be noted that the centerline of the rotating body 2 refers to the axis of rotation of the rotating body 2 itself; the centerline of the spiral hole 11 refers to the axis of the hole through which the cable passes, and its direction is consistent with the extension direction of the cable trench; perpendicular means that the centerline of the rotating body 2 and the centerline of the spiral hole 11 are orthogonal at 90°, forming a cross-shaped structure. The technical advantages of this design are: 1. This orthogonal design allows the rotating body 2 to primarily bear shear loads, while the spiral hole 11 bears axial loads (cable tension). This results in a more uniform distribution of shear stress on the cross-section of the rotating body 2, significantly reducing the stress concentration factor compared to the traditional coaxial design. Furthermore, under the same load, the fatigue life of the rotating body 2 with this orthogonal structure is longer than that of the coaxial design. 2. The centerline of the rotating body 2 being perpendicular to the direction of tension ensures that the rotation direction of the rotating body 2 is strictly orthogonal to the cable movement direction, eliminating the sliding friction component. Third, this structural design enables rapid calibration of the cable flipping device. During installation, it is only necessary to ensure that the axis of the rotating body 2 is perpendicular to the center line of the cable trench, without the need for complex angle adjustments.

[0029] Furthermore, the cable turning device includes a cable clamp 3 for clamping the cable. The cable clamp 3 can be fixed to the rotating body 2. When the crane pulls the cable, the tension is transmitted to the rotating body 2 through the cable clamp 3, rather than acting directly on the fixed structure at the cable outlet. This avoids fatigue loosening of fasteners caused by periodic tension in traditional designs.

[0030] Preferably, the cable reversing device includes a clamping component 4, which is used to clamp the cable clamp 3. The clamping component 4 is a fastening assembly used to fix the cable clamp 3, typically including bolts, nuts, pressure plates, etc. It achieves the fixation of the cable clamp 3 through mechanical constraint, ensuring the stability of the tensile force transmission path during cable reversal, while allowing for fine-tuning of the cable clamp 3 to adapt to changes in cable size. The clamping component 4 can adopt an elongated hole or a slotted design, allowing the cable clamp 3 to adapt to different cable bending radii. The clamping force can be precisely adjusted by controlling the bolt preload using a torque wrench.

[0031] In the embodiments provided in this application, a protective sleeve 5 is provided inside the cable clamp 3 to protect the cable. The protective sleeve 5 can be made of nylon or ultra-high molecular weight polyethylene, which has lower frictional damping compared to the metal cable clamp 3. On the other hand, the protective sleeve 5 also plays an elastic buffering role. The elastic modulus of the flexible protective sleeve 5 is much lower than that of the metal cable clamp 3. It can absorb the micro-displacement (such as vibration or thermal expansion and contraction) between the cable and the cable clamp 3 through elastic deformation, thereby avoiding stress concentration caused by rigid contact.

[0032] Furthermore, the cable clamp 3 consists of two semicircular pieces, each with a mounting platform on its outer side at both ends. The clamping element 4 is detachably connected to the mounting platform, and the clamping element 4 adjusts the contact gap between the mounting platforms. Symmetrical arc-shaped clamping plates (with an inner diameter matching the outer diameter of the protective sleeve 5 or the cable's outer diameter) form a closed structure through the mounting platforms on both outer sides. The mounting platforms are located on raised platforms at both ends of the semicircular pieces and have bolt holes or slots for fixing the clamping element 4. The clamping element 4 (e.g., a bolt) applies a centripetal force to the semicircular pieces through the mounting platforms, uniformly transmitting the clamping force from the mounting platforms along the arc surface of the semicircular pieces to the cable surface. The clamping element 4 (e.g., a bolt with an elongated hole) adjusts the distance between the mounting platforms to change the degree of closure of the semicircular pieces, thus adapting to different cable diameters. Elastic washers (e.g., silicone) or disc springs can also be introduced between the mounting platforms to allow automatic adjustment of the gap during cable thermal expansion, preventing overload clamping. For example, when the clamping element 4 is a bolt and nut, disassembly only requires loosening the nut to separate the semi-circular part, without the need for cutting or welding. The slot design of the mounting platform can quickly position the clamping element 4, shortening the assembly time. Moreover, the mounting platform is symmetrically distributed at both ends of the cable clamp 3, so that the clamping force is evenly distributed along the cable axis. In this embodiment, a double-layer clamping structure is adopted. The first layer of clamping is that the cable clamp 3 clamps the cable through the arc-shaped structure, forming friction between the cable and the clamp. The second layer of clamping: the clamping element 4 (such as a bolt) presses the cable clamp 3 onto the rotating body 2 to prevent relative sliding between the cable clamp 3 and the rotating body 2.

[0033] In the embodiments provided by this utility model, the outer side of the bracket 1 is arc-shaped. The arc-shaped design of the outer side of the bracket 1, under the condition of the cable being pulled to the left, achieves extremely low friction loss, precise motion control, and high impact resistance through geometric guidance, friction type conversion, and dynamic self-balancing mechanisms. This extends the service life of the bracket 1 and reduces maintenance costs, making it particularly suitable for heavy-load scenarios involving frequent reversals in port cranes. The specific technical mechanism is as follows: when the cable is pulled to the left, the rotating body 2 sinks below the arc-shaped outer side of the bracket 1. The arc-shaped surface of the outer side of the bracket 1 forms a continuous contact surface with the outer contour of the rotating body 2, guiding the rotating body 2 to move along a predetermined trajectory and preventing jamming due to lateral force deviation. When the rotating body 2 is located below the arc-shaped outer side of the bracket 1, the cable tension can be decomposed into two components: one is the normal force, perpendicular to the arc-shaped tangent, which is transmitted to the ground through the bracket 1. The other force is the normal force, which drives the rotating body 2 to continue rotating along the tangent of the arc. The arc design makes the normal force dominant, reducing the lateral compression of the rotating body 2 on the support 1 and avoiding stress concentration as in the traditional right-angle support 1. At the same time, when the rotating body 2 contacts the outer arc of the support 1, a rolling pair is formed instead of a sliding pair, which can significantly reduce wear.

[0034] In the embodiments provided by this utility model, a support structure 6 is provided on the side of the bracket 1. The support structure 6 is designed as a triangular rib or reinforcing rib and is set on the side of the bracket 1. It decomposes the tensile force transmitted by the rotating body 2 into vertical and horizontal components, which are transmitted to the ground and adjacent brackets 1 through the support structure 6, respectively. When the crane stops suddenly or the cable gets stuck, the support structure 6 absorbs the impact energy through plastic deformation (such as local yielding), and the maximum load-bearing capacity is greatly improved. Regarding the type of support structure 6, a box section can be used in high-load scenarios, and a triangular truss structure can be used in lightweight scenarios. It can be seen that the support structure 6 on the side of the bracket 1 systematically solves the problems of lateral deformation and fatigue failure of traditional brackets 1 through mechanical strengthening, dynamic stability improvement and environmental adaptability design. In practical applications, it has been shown that this design can extend the service life of the bracket 1 by 20 years and reduce maintenance costs, and is especially suitable for cable laying in some extreme working conditions.

[0035] The embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cable inversion device, characterized by The cable reversing device is disposed above the cable outlet, and the cable reversing device includes: A bracket (1) is fixed above the cable trench. Two brackets (1) are arranged opposite to each other. The bracket (1) is provided with a swivel hole (11) for the cable to pass through. A rotating body (2) that traverses the two supports (1) and is located above the rotating hole (11).

2. The cable inversion device of claim 1, wherein, The centerline of the rotating body (2) is perpendicular to the centerline of the spiral hole (11).

3. The cable inversion device of claim 2, wherein, The cable flipping device includes a cable clamp (3) for clamping the cable.

4. The cable inversion device of claim 3, wherein, The cable flipping device includes a clamping member (4) for clamping the cable clamp (3).

5. The cable inversion device of claim 4, wherein, The cable clamp (3) is provided with a protective sleeve (5) for protecting the cable.

6. The cable inversion device of claim 5, wherein, The cable clamp (3) consists of two semicircular parts, with mounting platforms provided on the outer sides of both ends of the semicircular parts. The clamping member (4) is detachably connected to the mounting platform, and the clamping member (4) adjusts the contact gap between the mounting platforms.

7. The cable inversion device of claim 6, wherein, The outer side of the bracket (1) is arc-shaped.

8. The cable inversion device of claim 7, wherein, The bracket (1) has a support structure (6) on its side.

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