Cable drum

Abstract

The invention provides a cable drum which comprises a drum body, a transmission mechanism is arranged on one side of the drum body, the drum body is coaxially and directly connected to the transmission mechanism, the drum body is directly driven to rotate through the transmission mechanism, no intermediate transmission link exists, the transmission mechanism comprises a motor and a rotating shaft, the motor is connected to the rotating shaft, and the motor is connected to the rotating shaft. The rotating shaft is connected to the winding drum body, and a current collection sliding ring is arranged on the other side of the winding drum body. The transmission mechanism is rigidly connected with the cable drum, intermediate transmission links are reduced, energy loss is reduced, mechanical efficiency is improved, only the transmission mechanism and the drum body need to be overhauled during maintenance, extra interface maintenance is not needed, and maintenance cost and time cost are reduced. No intermediate transmission link exists, so that mechanical vibration and noise are reduced, the fault risk caused by loosening or abrasion is reduced, and the winding efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cable reels, and particularly to a cable reel with constant tension control. By directly connecting the drive mechanism to the main body of the reel, the mechanical efficiency of the cable reel is improved, energy loss is reduced, and maintenance costs are lowered. Background Art

[0002] In the existing cable reel technology, the drive mechanism usually adopts an external mode and is connected to the cable reel through a coupling. This connection method results in a too long drive chain, such as gearbox → coupling → reel, significantly reducing the mechanical efficiency, and the energy loss is as high as 15% - 25%. At the same time, the connection of multiple components is prone to wear problems, such as wear on the tooth surface of the coupling and increase in bearing clearance, increasing the complexity of maintenance. It is necessary to regularly lubricate the gearbox and check the alignment state of the coupling. In addition, the three-phase asynchronous motor + frequency converter control system adopted is large in volume, occupying about 30% of the equipment space, which is not conducive to the compact design of the equipment. Summary of the Invention

[0003] In view of this, the present invention proposes a cable reel with constant tension control to solve the problems in the technical background. The specific technical solutions are as follows:

[0004] A cable reel includes a main body of the reel. A drive mechanism is provided on one side of the main body of the reel. The main body of the reel is directly coaxially connected to the drive mechanism, and the drive mechanism directly drives the main body of the reel to rotate without an intermediate drive link. The drive mechanism includes a motor and a rotating shaft. A speed reducer is provided above the motor. The speed reducer is connected to the rotating shaft. The rotating shaft is connected to the main body of the reel. A collector slip ring is provided on the other side of the main body of the reel.

[0005] Further, the main body of the reel includes a small reel, a large reel, a bracket, a small roller fixing plate, a small roller, a large roller, and a large roller fixing plate. A plurality of turns of cables are wound on the small reel. Large reels are coaxially provided on both sides of the small reel. A rotating shaft is provided at the center of the small reel. One end of the rotating shaft is connected to the motor.

[0006] Further, a large roller is provided above the non-contact part of the large reel. Small rollers are respectively provided at both ends of the large roller. One end of the large roller is connected to a small roller through a small roller fixing plate below, and the other end of the large roller is connected to another small roller through a small roller fixing plate above. The large roller is obliquely arranged. The lower part of the large roller is connected to the bracket through a large roller fixing plate.

[0007] Further, the motor is provided on the bracket. The lower part of the bracket is fixedly connected to the bottom plate. The bottom plate is a rectangular plate. The middle part below the bottom plate is connected to the base through a bearing. The shape and size of the bottom plate are the same as those of the upper surface of the base.

[0008] Furthermore, an outer bearing ring is provided outside the bearing.

[0009] Furthermore, the motor is a servo motor.

[0010] Adopting the above technical solution, the following beneficial effects are achieved:

[0011] In the present invention, by rigidly connecting the transmission mechanism with the cable reel, the intermediate transmission links are reduced, the energy loss is lowered, the mechanical efficiency is improved, and during maintenance, only the transmission mechanism and the reel body need to be overhauled, without the need for additional interface maintenance, reducing the maintenance cost and time cost. The absence of intermediate transmission links reduces mechanical vibration and noise, lowers the risk of failures caused by loosening or wear, and improves the winding efficiency. By means of the collector slip ring responding to the tension change, constant tension control during the cable winding process is achieved, improving the service life and safety of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic three-dimensional structure diagram of a cable reel of the present invention Figure 1 ;

[0013] Figure 2 is a schematic three-dimensional structure diagram of a cable reel of the present invention Figure 2 ;

[0014] Figure 3 is a schematic three-dimensional structure diagram of a cable reel of the present invention Figure 3 ;

[0015] Figure 4 is a schematic structural diagram of the reel body of a cable reel of the present invention;

[0016] In the figure: 1 - small reel; 2 - large reel; 3 - rotating shaft; 4 - collector slip ring; 5 - reducer; 6 - bracket; 7 - base; 8 - bottom plate; 9 - bearing; 10 - outer bearing ring; 11 - small drum fixing plate; 12 - small drum; 13 - large drum; 14 - large drum fixing plate; 15 - motor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0018] Embodiment 1, refer to Figures 1-4A constant-tension control cable reel as shown, the reel body includes a small reel 1, a large reel 2, and a bracket 6. The small reel 1 is used for winding the cable, and large reels 2 are coaxially arranged on both sides to prevent the cable from coming out. One end of the central rotating shaft 3 is directly connected to a speed reducer 5 and a servo motor 15 for driving. Above the large reel 2, a large roller 13 is obliquely arranged, and both ends are connected to small rollers 12 through a small roller fixing plate 11 to form a cable guiding channel. The large roller 13 is connected to the bracket 6 through a fixing plate to ensure uniform force.

[0019] In this embodiment, the servo motor 5 is directly used to drive the rotating shaft 3, eliminating the gearbox and coupling. The motor 5 is fixed on the bracket 6, and the bracket 6 is connected to the base 7 through a bottom plate 8. Between the bottom plate 8 and the base 7, a rotary support is realized through a bearing 9 (including a bearing outer ring 10) to ensure that the reel rotates flexibly when winding and unwinding the cable.

[0020] The slip ring 4 is integrated on the non-driving side of the reel. When paying out the cable: if the tension is too high, the controller reduces the speed of the motor 5 to reduce the resistance of paying out the cable. When winding the cable: if the tension is too low, the torque of the motor 5 is increased to ensure that the cable is tightly wound.

[0021] In Embodiment 2, based on Embodiment 1, the reel body is coaxially and directly connected to a transmission mechanism, and the reel body is directly driven to rotate by the transmission mechanism without an intermediate transmission link. The transmission mechanism includes a motor 5 and a rotating shaft 3. The motor 5 is connected to the rotating shaft 3, and the rotating shaft 3 is connected to the reel body. On the other side of the reel body, there is a slip ring 4 to respond to the tension change.

[0022] See Figures 1-4 as shown

[0023] The reel body includes a small reel 1, a large reel 2, a bracket 6, a small roller fixing plate 11, small rollers 12, a large roller 13, and a large roller fixing plate 14. Multiple turns of cable are wound on the small reel 1. Large reels 2 are coaxially arranged on both sides of the small reel 1. A rotating shaft 3 is provided at the center of the small reel 1. One end of the rotating shaft 3 is connected to the motor 5. Above the non-contact part of the large reel 2, there is a large roller 13. Small rollers 12 are respectively provided at both ends of the large roller. One end below the large roller 13 is connected to a small roller 12 through a small roller fixing plate, and the other end above the large roller 13 is connected to another small roller 12 through a small roller fixing plate. The large roller 13 is obliquely arranged. The lower part of the large roller 13 is connected to the bracket 6 through a large roller fixing plate 14. The motor 5 is arranged on the bracket 6. The lower part of the bracket 6 is fixedly connected to the bottom plate 8. The bottom plate 8 is a rectangular plate. The middle part below the bottom plate 8 is connected to the base 7 through a bearing 9. The shape and size of the bottom plate 8 are the same as those of the upper surface of the base 7. The bearing 9 is externally provided with a bearing outer ring 10. The motor 5 is a servo motor 5.

[0024] In this embodiment, the inclination angle of the large drum 13 is 15° to 30°, and the model of the tension controller is LE-40MTA of Mitsubishi, Japan.

[0025] The cable starts winding from the small reel 1. After winding multiple turns, it gradually transitions to the large reel 2. The large reel 2 has a larger diameter, allowing the cable to be wound more loosely, reducing friction and extrusion. The large drum 13 is obliquely arranged above the large reel 2, and both ends are connected to the rotatable small drum 12 through the small drum 12 fixing plate 11. The collector slip ring 4 dynamically adjusts the rotation speed and torque of the servo motor 5 according to the deviation between the preset tension value and the actual tension value.

[0026] The present invention is rigidly connected to the cable reel through the transmission mechanism, reducing the intermediate transmission link, lowering the energy loss, improving the mechanical efficiency. During maintenance, only the transmission mechanism and the reel body need to be inspected, without the need for additional interface maintenance, reducing the maintenance cost and time cost. The absence of the intermediate transmission link reduces mechanical vibration and noise, lowering the failure risk caused by loosening or wear, and improving the winding efficiency. By the collector slip ring 4 responding to the tension change, the constant tension control during the cable winding process is achieved, improving the service life and safety of the cable.

[0027] The present invention can be installed on various devices. For example, in the application of a port crane, this cable reel is directly driven by the servo motor 5, and the collector slip ring 4 automatically adjusts the cable retracting and paying-out speed according to the moving speed of the jib.

[0028] The above describes the basic principle and main features of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the invention claimed is defined by the appended claims and their equivalents.

Claims

1. A cable reel, comprising a reel body, characterized in that, One side of the drum body is provided with a transmission mechanism. The drum body is directly connected coaxially to the transmission mechanism, and the drum body is directly driven to rotate by the transmission mechanism without an intermediate transmission link. The transmission mechanism includes a motor and a rotating shaft. A speed reducer is arranged above the motor. The speed reducer is connected to the rotating shaft, and the rotating shaft is connected to the drum body. A collector slip ring is arranged on the other side of the drum body.

2. A cable reel according to claim 1, characterized in that, The drum body includes a small reel, a large reel, a bracket, a small drum fixing plate, a small drum, a large drum, and a large drum fixing plate. Multiple turns of cables are wound around the small reel. Large reels are coaxially arranged on both sides of the small reel. A rotating shaft is arranged at the center of the small reel.

3. The cable reel according to claim 2, characterized in that, A large drum is arranged above the non-contact part of the large reel. Small drums are respectively arranged at both ends of the large roller. One end of the large drum is connected to a small drum through a small roller fixing plate below, and the other end of the large drum is connected to another small drum through a small roller fixing plate above. The large drum is obliquely arranged, and the lower part of the large drum is connected to the bracket through a large drum fixing plate.

4. A cable reel according to claim 1, characterized in that, The motor is arranged on the bracket. The lower part of the bracket is fixedly connected to the bottom plate. The bottom plate is a rectangular plate. The middle part of the lower part of the bottom plate is connected to the base through a bearing. The shape and size of the bottom plate are the same as those of the upper surface of the base.

5. A cable reel according to claim 4, characterized in that, An outer bearing ring is arranged outside the bearing.

6. A cable reel according to claim 1 or 4, characterized in that, The motor is a servo motor.

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