Cable winding and unwinding device

Abstract

The invention discloses a cable take-up and pay-off device. The device comprises a working box; the transmission mechanism is arranged in the working box and is used for winding and unwinding a cable; two ends of the cable are provided with quick-plug interfaces, one end is used for being connected with a power grid, and the other end is used for being connected with a charging pile. According to the scheme, the charging pile main cabinet does not need to be reopened for wiring when the charging pile is replaced, the charging pile does not need to be carried, and safety accidents possibly occurring in the test process are greatly reduced. In addition, as the three-phase cable is thick and difficult to wind, and if the three-phase cable is stretched and retracted by adopting a mode similar to a wire roller, when a close charging pile is connected, as most of the cable is still wound on the wire roller, a large electromagnetic field and accumulated heat can be generated after the charging pile is electrified, and safety accidents are easily caused. According to the scheme, negative effects caused by cable winding can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of power auxiliary equipment, and in particular to a cable retracting and releasing device. Background Art

[0002] With the rapid development of the new energy vehicle industry, car charging compatibility and charging safety have become the focus of users. Therefore, major OEMs will conduct real-car and real-pile compatibility tests before the product is launched. Since the road test method is used to verify the compatibility of the car and the pile, the test cost is high, and the vehicle is highly confidential during the R&D stage, there is a high risk of leakage when testing compatibility at the charging station. Many OEMs and third-party testing organizations have established charging pile laboratories in their own parks. However, there are many brands and quantities of charging piles in the laboratory, and the charging piles are large in size and difficult to carry. Repeated disassembly and wiring may cause safety risks such as electric shock and injury.

[0003] In the prior art, the three-phase cables used in charging piles are usually thick and difficult to wind. If a wire roller mode is used to achieve extension and retraction, when connecting to a nearby charging pile, most of the cables will be thrown on the wire roller and entangled. After power is turned on, a large electromagnetic field and heat accumulation will be generated, which can easily cause safety accidents. Summary of the invention

[0004] The purpose of the present invention is to provide a cable retracting device, which can reduce the safety risks during the transportation and repeated disassembly and wiring of charging piles, and avoid safety accidents caused by cable entanglement.

[0005] To achieve the above object, the present invention provides the following solutions: In a first aspect, the present application provides a cable retracting device, comprising: Work Box; A transmission mechanism disposed in the working box, used for retracting and releasing the cables; Both ends of the cable are provided with quick-plug interfaces, one end is used to connect to the power grid, and the other end is used to connect to the charging pile.

[0006] Preferably, the transmission mechanism comprises at least two transmission submodules, and the transmission submodules comprise: Motor; A ball screw structure fixedly connected to the motor, wherein the motor drives the screw of the ball screw structure to rotate when the motor rotates, and the screw drives the moving pair to move up and down; A rotating pair fixedly connected to the moving pair; The roller fixedly connected to the rotating pair is used for carrying the cable.

[0007] Preferably, two limit blocks are provided on the lead screw for limiting the moving range of the moving pair.

[0008] Preferably, when the movable pair of the adjacent transmission sub-module moves along the lead screw in the away direction to the limit block, the roller is driven to pull the cable to shorten it; when the movable pair of the adjacent transmission sub-module moves along the lead screw in the approach direction to the middle position between the two limit blocks, the roller is driven to release the cable to extend it.

[0009] Preferably, the roller is further provided with a wire groove and a limiting device, which is used to limit the cable in the wire groove through the limiting device to prevent the cable from escaping from the roller.

[0010] Preferably, the cable retracting and releasing device further comprises: a remote control module electrically connected to the transmission mechanism, for controlling the transmission mechanism to retract and release the cable.

[0011] Preferably, the remote control module comprises: an extension unit for controlling the transmission mechanism to release the cable; A shortening unit for controlling the transmission mechanism to retract the cable; A pause unit is used to control the transmission mechanism to pause releasing or retrieving the cable.

[0012] Preferably, a moving module is further provided at the bottom of the working box, for controlling the cable taking-up and releasing device to move in a set direction when controlling the transmission mechanism to take-up and release the cable.

[0013] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects: The cable retracting device provided by the present application does not require reopening the charging pile host cabinet for wiring when replacing the charging pile, nor does it require moving the charging pile, which greatly reduces the safety accidents that may occur during the test. In addition, since the three cables are thick and difficult to wind, and if a similar wire roller mode is used to achieve extension and retraction, when connecting to a nearby charging pile, most of the cables are still wound on the wire roller, which will generate a large electromagnetic field and heat accumulation after power is turned on, which is easy to cause safety accidents. The present application solution can avoid the negative effects caused by cable winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 A schematic diagram of the structure of a cable retracting device provided in an embodiment of the present application; Figure 2 A schematic diagram of the structure of the transmission submodule provided in an embodiment of the present application. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] The purpose of the present invention is to provide a cable retracting device, which aims to reduce the safety risks during the transportation and repeated disassembly and wiring of charging piles, and avoid safety accidents caused by cable entanglement.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] refer to Figure 1 As shown, the cable retracting device provided by the present application includes: a working box, a transmission mechanism, and a cable, wherein the transmission mechanism is arranged in the working box, and is composed of a plurality of sub-transmission mechanisms. For example, the transmission mechanism is composed of 5 transmission sub-modules, and the cable is wrapped around the transmission mechanism. Quick-plug interfaces are respectively provided at both ends, one end is used to connect to the power grid, and the other end is used to connect to the charging pile. In this embodiment, the extension or shortening of the cable is achieved by running the transmission mechanism. In this embodiment, the transmission sub-modules of the transmission mechanism can be 5, 7, 8, etc. The specific number needs to be determined in combination with the length of the cable and the storage volume. The above is only an exemplary description and cannot be used as a limitation on the scope of protection.

[0020] In a scenario of an embodiment, when a charging pile is needed to charge a vehicle, the cable is controlled to extend or shorten to a length that can adapt to the distance between the charging pile and the power grid by operating the transmission mechanism of the cable retracting device, and the cable is connected to the power grid and the charging pile respectively through the quick-plug interfaces at both ends of the cable to realize power supply to the charging pile. For situations where there are many brands and quantities of charging piles in the test room, the charging piles are large in size and difficult to carry, and they need to be repeatedly disassembled and wired, when conducting compatibility tests on real vehicles and real piles, by adopting the cable retracting device of the present application, there is no need to repeatedly carry the charging piles and repeatedly disassemble and wire them, thereby greatly reducing the risk of safety accidents that may occur during the experiment.

[0021] refer to Figure 2As shown, the transmission submodule of the present application includes: a motor, a ball screw structure, a rotating pair and a roller, wherein the ball screw structure is fixedly connected to the rotating shaft of the motor, the moving pair on the ball screw structure is fixedly connected to the rotating pair, the rotating pair is fixedly connected to the roller, and the cable is wrapped around the roller. When the motor rotates, it drives the lead screw of the ball screw structure to rotate, and the lead screw rotates to drive the moving pair on it to move up and down. When the moving pair moves up and down, it drives the rotating pair and the roller to move up and down.

[0022] In an embodiment of the present application, a wire groove is provided on the roller, and the cable is wound in the wire groove so that the cable can move inside the wire groove when the roller moves up and down. In order to further prevent the cable from detaching from the roller, a limiting device is also provided on the roller, through which the cable can be limited to move in the wire groove.

[0023] In an embodiment of the present application, two limit blocks are further provided on the screw of the ball screw structure. The two limit blocks are respectively located on the upper and lower sides of the moving pair and are used to limit the up and down movement distance of the moving pair. The limit blocks can prevent the cables from being shortened to the inside of the working box and being difficult to remove when the motor drives the moving pair to move up and down.

[0024] In an embodiment of the present application, the cable retracting and releasing device is further provided with a remote control module, which is used to send control signals to the transmission mechanism, such as an extension signal, a shortening signal, and a pause signal, and the transmission mechanism controls the extension, shortening, and pausing of the cable during the extension or shortening process by executing the control signal. Specifically, the remote control module sends an extension control signal through the extension unit, sends a shortening control signal through the shortening unit, and sends a pause control signal through the pause unit.

[0025] Continue to refer Figure 1 As shown, in an embodiment of the present application, the transmission mechanism is composed of 5 transmission sub-modules. Assuming that the transmission sub-modules are numbered 1, 2, 3, 4 and 5, the two dotted lines correspond to the positions of the upper limit blocks of the ball screw.

[0026] When the cable collecting device is controlled by the remote control module to extend the cable, in a scenario of an embodiment, the transmission mechanism controls the moving pairs of the adjacent transmission submodules to move along the lead screw in the approaching direction to the middle position of the two limit blocks on each lead screw according to the received extension control signal, such as the moving pairs of transmission submodule No. 1, transmission submodule No. 3 and transmission submodule No. 5 move upward to the middle position of the two dotted lines, and transmission submodule No. 2 and transmission submodule No. 4 move downward to the middle position of the two dotted lines, and the cable on one side is tightened to achieve the purpose of cable extension; in a scenario of another embodiment, the transmission mechanism preferentially controls the moving pair of transmission submodule No. 5 to move to the middle position of the two limit blocks according to the received extension control signal, so that the cable on the right is relaxed and extended, and when the cable length is insufficient and needs to be further extended, the moving pair of transmission submodule No. 4 is controlled to move to the middle position of the two limit blocks. The whole process is manually operated to drag the cable on one side to tighten the cable to achieve the purpose of extension, and the remote control device is released when the appropriate position is reached to stop driving the motor of the corresponding transmission submodule.

[0027] When the cable is shortened by controlling the cable retracting and releasing device through the remote control module, in a scenario of one embodiment, the transmission mechanism controls the moving pairs of adjacent transmission submodules to move away from the lead screw to the position of the corresponding limit blocks on each lead screw according to the received shortening control signal, such as the moving pairs of transmission submodule No. 1, transmission submodule No. 3 and transmission submodule No. 5 move downward to the position of the lower limit block, and transmission submodule No. 2 and transmission submodule No. 4 move upward to the position of the upper limit block, and the moving pairs drive the rollers to pull the cables into the working box to achieve the purpose of shortening the cables; in a scenario of another embodiment, the transmission mechanism preferentially controls the moving pair of transmission submodule No. 1 to move to the position of the lower limit block according to the received shortening control signal, so that the cable on the right is shortened. When the moving pair of transmission submodule No. 1 moves to the limit and when the cable length needs to be further shortened, the moving pair of transmission submodule No. 2 is controlled to move to the position of the upper limit block, and so on, until the cable is shortened to the required length.

[0028] When the cable retracting and releasing device is controlled by the remote control module to extend or shorten the cable, when the transmission mechanism receives a pause signal triggered by the remote control module, the transmission mechanism pauses the extension or shortening of the cable.

[0029] In an embodiment of the present application, a moving module is further provided at the bottom of the working item of the cable retracting device. When the control transmission mechanism controls the extension or retraction of the cable, the control moving module drives the cable retracting device to move in a preset direction. In a scenario of one embodiment, when the control transmission mechanism extends the cable, the moving module drives the cable retracting device to move to the left; in a scenario of another embodiment, when the control transmission mechanism shortens the cable, the moving module drives the cable retracting device to move to the right.

[0030] In an embodiment of the present application, when the cable is extended or shortened to a length that meets the distance between the power grid and the charging pile, one end is connected to the charging pile L1\L2\L3\N through a quick-plug interface to ensure good grounding, and the other end is connected to the three cables (L1 L2 L3 N PE) of the power grid through a quick-plug interface.

[0031] In summary, the solution provided by this application does not require reopening the charging pile host cabinet for wiring when replacing the charging pile, nor does it require moving the charging pile, which greatly reduces the safety accidents that may occur during the test. In addition, since the three cables are thick and difficult to wind, and if a similar wire roller mode is used to achieve extension and retraction, when connecting a nearby charging pile, most of the cables are still wound on the wire roller, which will generate a large electromagnetic field and heat accumulation after power is turned on, which is easy to cause safety accidents. The solution of this application can avoid the negative effects caused by cable winding.

[0032] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0033] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A cable retracting device, characterized in that: The cable retracting device comprises: Work Box; A transmission mechanism disposed in the working box, used for retracting and releasing the cables; The two ends of the cable are provided with quick-plug interfaces, one end is used to connect to the power grid, and the other end is used to connect to the charging pile; The transmission mechanism includes at least two transmission sub-modules, and the transmission sub-modules include: Motor; A ball screw structure fixedly connected to the motor, wherein the motor drives the screw of the ball screw structure to rotate when the motor rotates, and the screw drives the moving pair to move up and down; A rotating pair fixedly connected to the moving pair; The roller fixedly connected to the rotating pair is used to carry the cable.

2. The cable retracting device according to claim 1, characterized in that: The lead screw is provided with two limit blocks for limiting the moving range of the moving pair.

3. The cable retracting device according to claim 2, characterized in that: When the moving pair of the adjacent transmission submodule moves away from the lead screw to the limit block, the roller is driven to pull the cable to shorten it; When the moving pairs of the adjacent transmission submodules move along the lead screw in the approaching direction to the middle position of the two limit blocks, the roller is driven to release the cable for extension.

4. The cable retracting device according to claim 1, characterized in that: The roller is also provided with a wire groove and a limiting device, which is used to limit the cable in the wire groove through the limiting device to prevent it from escaping from the roller.

5. The cable retracting device according to any one of claims 1 to 4, characterized in that: The cable retracting device further comprises: A remote control module electrically connected to the transmission mechanism is used to control the transmission mechanism to retract and release the cable.

6. The cable retracting device according to claim 5, characterized in that: The remote control module comprises: an extension unit for controlling the transmission mechanism to release the cable; A shortening unit for controlling the transmission mechanism to retract the cable; A pause unit is used to control the transmission mechanism to pause releasing or retrieving the cable.

7. The cable retracting device according to claim 5, characterized in that: A moving module is also provided at the bottom of the working box, which is used to control the cable taking-up and releasing device to move in a set direction when controlling the transmission mechanism to take up and release the cable.

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