An overcurrent protection device for a rotary connector and a rotary connector

Abstract

The utility model provides a kind of overcurrent protection device and rotary connector for rotary connector, including self-restoring fuse module and current-limiting circuit breaker module;Self-restoring fuse module and current-limiting circuit breaker module are set in shell as a whole module arrangement.Self-restoring fuse module and current-limiting circuit breaker module are connected with the one end of respective corresponding plug-in piece by cable, and the circuit loop of the rotary connector outside shell is connected with the other end of each plug-in piece, to make self-restoring fuse module, current-limiting circuit breaker module respectively be connected in series in circuit loop, cut off current protection circuit under overcurrent state.The utility model is combined installation with rotary connector in modular form, can be realized quick dismounting by connector, and it is simple to use and maintain, can effectively avoid the damage phenomenon caused by circuit overcurrent in the use of rotary connector, and have timely fault feedback alarm and fault elimination automatic recovery conducting function, under the condition of regular maintenance, it can be reused repeatedly.

Description

Technical Field

[0001] This utility model belongs to the technical field of electrical safety devices, specifically relating to an overcurrent protection device for a rotary connector and a rotary connector including the overcurrent protection device. Background Technology

[0002] Rotary connectors typically consist of a stator and a rotor. They transmit electrical or signal signals through brushes, slip rings, or other contact methods. During rotation, the contact points between the stator and rotor continuously change, thus achieving continuous transmission. Rotary connectors solve the electrical connection problem between rotating and stationary parts, playing a crucial role in many industries and machines, and are widely used for transmitting electrical, optical, and fluid signals.

[0003] However, since rotary connectors are installed between stationary and rotating equipment, overcurrent may occur when high voltage is applied to either the stationary or rotating equipment, potentially causing component damage. Rotational motion and complex operating environments can also cause wear and tear, making component burnout more likely. Therefore, designing an effective protection device is crucial for ensuring the normal operation of rotary connectors. Utility Model Content

[0004] The purpose of this invention is to solve the technical problem of overcurrent damage to rotary connectors in the prior art, and to provide an overcurrent protection device for rotary connectors, and a rotary connector including the overcurrent protection device.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] An overcurrent protection device for a rotary connector is provided, including a resettable fuse module and a current-limiting circuit breaker module. The resettable fuse module and the current-limiting circuit breaker module are respectively connected to one end of their respective connectors via cables, and the other end of each connector is connected to the circuit loop of the rotary connector. This allows the resettable fuse module to be connected in series in the circuit loop of each power signal, and the current-limiting circuit breaker module to be connected in series in the azimuth power amplifier circuit loop and the elevation power amplifier circuit loop of the radar, respectively, to cut off the current protection circuit in the event of an overcurrent.

[0007] Furthermore, the self-resetting fuse module includes multiple self-resetting fuses spaced apart; the current-limiting circuit breaker module includes multiple current-limiting circuit breakers spaced apart, and the sum of the number of self-resetting fuses and current-limiting circuit breakers is consistent with the number of connectors.

[0008] Furthermore, the overcurrent protection device also includes a housing; the housing is hollow inside, and the self-resetting fuse module and the current limiting circuit breaker module are arranged inside the housing at a distance of 2.5~3.5cm; multiple connectors are installed on the side wall of the housing.

[0009] Furthermore, the spacing between two adjacent resettable fuses and between two adjacent current-limiting circuit breakers is 2.5~3.5cm.

[0010] Furthermore, the current-limiting circuit breaker includes an electromagnetic trip unit, the operating current threshold of which is set to 80% to 95% of the maximum withstand current of the rotary connector.

[0011] Furthermore, the current-limiting circuit breaker is reset manually.

[0012] Furthermore, the types and quantities of connectors are changed or increased / decreased according to the number of circuits that need to be protected in the rotary connector.

[0013] Furthermore, the overcurrent protection device also includes a protective cover, which is mounted on the housing to cover or expose the connector, preventing damage to the connector or contamination of the internal pins and sockets when the overcurrent protection device is not in use.

[0014] A rotary connector is also provided, including a rotating body, a fixed body, and a conductive slip ring, wherein the power input terminal of the rotating body or the fixed body is connected to the aforementioned overcurrent protection device.

[0015] The advantages of this utility model are:

[0016] 1. This utility model discloses an overcurrent protection device for a rotary connector. A self-resetting fuse module and a current-limiting circuit breaker module are modularly installed with the rotary connector. In an overcurrent situation, the current can be cut off by the current-limiting circuit breaker module and the self-resetting fuse module, effectively preventing damage to the rotary connector caused by excessive circuit overcurrent, thus protecting the rotary connector. Furthermore, quick assembly and disassembly are possible via connectors, simplifying use and maintenance.

[0017] 2. The overcurrent protection device for a rotary connector designed in this utility model has a self-resetting fuse module that automatically restores conduction after the fault is cleared, and a current limiting circuit breaking module that is manually reset after the fault is cleared, so that the overcurrent protection device can be reused multiple times under regular maintenance.

[0018] 3. The rotary connector provided by this utility model has an overcurrent protection device, which prevents damage to the rotary connector and components in the connected equipment due to overcurrent, and does not affect the normal operation of other equipment; at the same time, it eliminates the risk of overheating and smoking of the rotary connector due to overcurrent, thus improving the safety of the electrical system. Attached Figure Description

[0019] The features and advantages of this invention will become more readily understood from the following description with reference to the accompanying drawings, which are not drawn to scale and some features are enlarged or reduced to show details of specific parts.

[0020] Figure 1 This is a schematic diagram of the structure of an overcurrent protection device for a rotary connector according to this utility model;

[0021] Figure 2 This is a bottom view of an overcurrent protection device for a rotary connector according to this utility model;

[0022] Figure 3 This is a cross-sectional view of the internal structure of an overcurrent protection device for a rotary connector according to this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the self-resetting safety module of this utility model;

[0024] Figure 5 This is a structural schematic diagram of the current limiting and circuit breaking module of this utility model.

[0025] In the diagram: 1-Connector; 2-Housing; 3-Resettable fuse module; 31-Resettable fuse; 4-Current limiting circuit breaker module; 41-Current limiting circuit breaker. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments thereof. It should be noted that the following detailed description of the present invention is for illustrative purposes only and is not intended to limit the scope of the invention.

[0027] This utility model provides an overcurrent protection device for rotary connectors, such as... Figure 1 , 2 As shown in Figure 3, the system includes a housing 2, a self-resetting fuse module 3, and a current-limiting circuit breaker module 4. The housing 2 is hollow inside, and multiple connectors 1 are provided on the side wall of the housing 2. The self-resetting fuse module 3 and the current-limiting circuit breaker module 4 are located inside the housing 2. The self-resetting fuse module 3 and the current-limiting circuit breaker module 4 are respectively connected to one end of their respective connectors 1 via cables, and the other end of each connector 1 is connected to the circuit loop of the rotary connector outside the housing 2, so that the self-resetting fuse module 3 is connected in series in the circuit loop of each power signal, and the current-limiting circuit breaker module 4 is connected in series in the azimuth power amplifier circuit loop and the elevation power amplifier circuit loop of the radar, respectively, to cut off the current protection circuit in the overcurrent state.

[0028] This invention discloses an overcurrent protection device for a rotary connector. The self-resetting fuse module 3 and the current-limiting circuit breaker module 4 are modularly installed with the rotary connector. In an overcurrent situation, the current can be interrupted by the current-limiting circuit breaker module 4 and the self-resetting fuse module 3, effectively preventing damage to the rotary connector caused by excessive circuit overcurrent, thus protecting the rotary connector. Simultaneously, quick assembly and disassembly are achieved through connectors, simplifying use and maintenance. The self-resetting fuse module 3 and the current-limiting circuit breaker module 4 are uniformly installed within the housing 2, which provides protection for the entire device.

[0029] In this embodiment, as Figure 4 , 5 As shown, the self-resetting fuse module 3 includes multiple self-resetting fuses 31 spaced apart; the current-limiting circuit breaker module 4 includes multiple current-limiting circuit breakers 41 spaced apart. The total number of self-resetting fuses 31 and current-limiting circuit breakers 41 is the same as the number of connectors 1. Both ends of the self-resetting fuse 31 are connected in series through connectors 1 in a circuit loop of 15A or less. It is used to interrupt the current in a high-resistance state under overcurrent conditions and automatically restore conduction after the fault is cleared. The positive temperature coefficient (PTC) material trigger current value of the self-resetting fuse 31 is 1.5-3 times the rated current of the rotary connector. The positive temperature coefficient (PTC) characteristic of the self-resetting fuse 31 is as follows: at normal temperature, conductive particles form a conductive path, and the material exhibits a low resistance state; when the current abnormally increases, the polymer matrix expands due to thermal effects, causing the contact between conductive particles to break, and the resistance value shows a non-linear increase, thereby limiting the current flow. This process is reversible. When the fault is cleared and the temperature drops, the material recrystallizes, the conductive path is restored, and the resistance returns to the initial low value. Both ends of the current-limiting circuit breaker 41 are connected in series in a circuit loop of 15A or more via the plug-in 1, which can mechanically interrupt the current.

[0030] In this embodiment, the self-resetting fuse module 3 and the current-limiting circuit breaker module 4 are spaced 2.5~3.5cm apart. The spacing between two adjacent self-resetting fuses 31 and between two adjacent current-limiting circuit breakers 41 is also 2.5~3.5cm. This spacing in this embodiment prevents interference between components and avoids short circuits. In other embodiments, insulating covers can also be installed around each device to achieve the same effect of preventing interference.

[0031] In this embodiment, the current-limiting circuit breaker 41 includes an electromagnetic trip unit, the operating current threshold of which is set to 80%~95% of the maximum withstand current of the rotary connector. The current-limiting circuit breaker is reset manually, and its reset button is exposed outside the casing of the current-limiting circuit breaker. When the current in the detection circuit exceeds the preset threshold, mechanical disconnection is triggered, and manual reset is performed after the fault is cleared.

[0032] In this embodiment, the type and quantity of the connector 1 are changed and increased or decreased according to the number of circuits that need to be protected in the rotary connector. The number of connector 1, resettable fuse 31 and current-limiting circuit breaker 41 are set based on the number of circuits that need to be protected in the rotary connector.

[0033] In this embodiment, the overcurrent protection device also includes a protective cover, which is installed on the housing 2 to cover or expose the connector 1. When the overcurrent protection device is not used, the protective cover can be installed on the connector 1 to prevent damage to or contamination of the internal pins and sockets of the connector 1.

[0034] In this embodiment, as Figure 2 As shown, the outer casing 2 is a metal shell. The top panel on the top surface and the bottom panel on the bottom surface of the outer casing 2 are not integrally formed with the side walls of the outer casing 2. The top panel and the bottom panel are respectively installed on the top and bottom surfaces of the outer casing 2 by bolts. The bottom panel can be opened. When the self-resetting fuse module 3 or the current limiting circuit breaker module 4 is damaged or requires maintenance, the top panel of the outer protective shell can be opened for inspection and maintenance. The self-resetting fuse module 3 and the current limiting circuit breaker module 4 are the main body of the protection device. When the overcurrent protection current passes through the overcurrent protection device, the protection module works normally as long as the current is below the current threshold. When the current reaches the current threshold, the protection module will quickly cut off the circuit connection, thereby protecting the entire circuit.

[0035] This embodiment also provides a rotary connector, including a rotating body, a fixed body, and a conductive slip ring. The power input terminal of the rotating body or the fixed body is connected to the aforementioned overcurrent protection device. In use, the overcurrent protection device is installed on the usage location via a hard connection; the protection circuit is connected to the self-resetting fuse module 3 or the current limiting circuit breaker module 4 via a connector before being connected to the rotary connector.

[0036] The working steps of using this utility model's overcurrent protection device to protect the rotary connector are as follows:

[0037] Self-resetting fuse module 3 connects to circuit loops with an A rating of 15A or less; current limiting circuit breaker module 4 connects to circuit loops with an A rating of 15A or more.

[0038] When the current in a circuit below 15A reaches the threshold, the resistance of the self-resetting fuse element in the self-resetting fuse module 3 will increase rapidly, limiting the current flow; after the fault is cleared, the resistance of the self-resetting fuse element will return to a low resistance state, and the current will flow normally.

[0039] When the current in a circuit circuit of 15A or higher reaches the threshold, the circuit breaker in the current limiting circuit breaker module 4 will quickly disconnect to protect the circuit equipment from damage by overload current; after the fault is cleared, manually turn on the current limiting circuit breaker module 4 to allow the current to pass normally.

[0040] Finally, it should be noted that the features mentioned and / or shown in the above description of exemplary embodiments of the present invention can be combined in the same or similar manner with one or more other embodiments, combined with features in other embodiments, or substituted for corresponding features in other embodiments. These combined or substituted technical solutions should also be considered as included within the protection scope of the present invention.

Claims

1. An overcurrent protection device for a rotary connector, characterized in that, This includes a self-recovering fuse module and a current-limiting circuit breaker module; The self-resetting fuse module and the current limiting circuit breaker module are respectively connected to one end of their respective connectors via cables, and the other end of each connector is connected to the circuit loop of the rotary connector, so that the self-resetting fuse module is connected in series in the circuit loop of each power signal, and the current limiting circuit breaker module is connected in series in the azimuth power amplifier circuit loop and the elevation power amplifier circuit loop of the radar, respectively, to cut off the current protection circuit in the overcurrent state.

2. The overcurrent protection device according to claim 1, characterized in that, The self-resetting fuse module includes multiple self-resetting fuses spaced at intervals; the current-limiting circuit breaker module includes multiple current-limiting circuit breakers spaced at intervals, and the sum of the number of the self-resetting fuses and the current-limiting circuit breakers is consistent with the number of the connectors.

3. The overcurrent protection device according to claim 1, characterized in that, The overcurrent protection device also includes a housing; the housing is hollow inside, and the self-resetting fuse module and the current limiting circuit breaker module are disposed inside the housing at a distance of 2.5~3.5cm; a plurality of the plug-in components are installed on the side wall of the housing.

4. The overcurrent protection device according to claim 2, characterized in that, The spacing between two adjacent resettable fuses and between two adjacent current-limiting circuit breakers is 2.5~3.5cm.

5. The overcurrent protection device according to claim 2, characterized in that, The current-limiting circuit breaker includes an electromagnetic trip unit, and the operating current threshold of the electromagnetic trip unit is set to 80% to 95% of the maximum withstand current of the rotary connector.

6. The overcurrent protection device according to claim 2, characterized in that, The current-limiting circuit breaker is reset manually.

7. The overcurrent protection device according to claim 1, characterized in that, The type and quantity of the connectors are changed or increased or decreased according to the number of circuits that need to be protected in the rotary connector.

8. The overcurrent protection device according to claim 3, characterized in that, The overcurrent protection device also includes a protective cover, which is installed on the housing to cover or expose the connector and prevent damage to or contamination of the internal pins and sockets of the connector when the overcurrent protection device is not in use.

9. A rotary connector, comprising a rotating body, a fixed body, and a conductive slip ring, characterized in that, The power supply input terminal of the rotating or fixed body is connected to the overcurrent protection device as described in any one of claims 1 to 8.

Images