Moving contact assembly, change-over switch and power distribution equipment

Abstract

The utility model provides a moving contact assembly, a change-over switch and power distribution equipment, and relates to the technical field of low-voltage electric appliances. The moving contact assembly comprises a shell, a moving contact, a soft connecting wire and a sleeve; the moving contact is arranged in the shell, the soft connecting line is connected with the moving contact, and the sleeve is sleeved outside the soft connecting line and is used for protecting the end part of the soft connecting line connected with the moving contact. The sleeve is sleeved outside the soft connecting line to protect the soft connecting line, so that the end part of the soft connecting line is protected, the bending stress is released at the flexible bending section of the soft connecting line, and the end part of the soft connecting line is prevented from fatigue tearing and even breakage after the moving contact assembly operates for a long time; therefore, the service lives of the soft connecting wire and the moving contact assembly are prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a moving contact assembly, a conversion switch and a power distribution device. Background Art

[0002] The transfer switch is mainly used in working environments where low-voltage power distribution systems are powered by two power supplies. Its function is to automatically convert the main power supply of the transmission and distribution line to the backup power supply when problems or failures occur in the normal power supply, thereby achieving uninterrupted power supply to the entire circuit, thereby ensuring the continuity and stability of power consumption for key loads.

[0003] During the operation of the transfer switch, the moving contact will rotate under the drive of the driving mechanism to achieve the action of switching the power supply. The moving contact is usually connected to the load end by a soft connecting wire. During the rotation of the moving contact, due to the large rotation angle of the moving contact, the bending stress will be concentrated on the connection between the soft connecting wire and the moving contact, which will cause fatigue tearing or even breakage of the soft connecting wire after long-term operation. Utility Model Content

[0004] The utility model aims to provide a moving contact assembly, a conversion switch and a power distribution device, which can effectively protect the flexible connecting wire and prolong its service life.

[0005] The embodiment of the utility model is achieved as follows:

[0006] In a first aspect, the utility model provides a moving contact assembly, including a housing, a moving contact, a flexible connecting wire and a sleeve;

[0007] The moving contact is arranged on the housing, the flexible connection line is connected to the moving contact, and the sleeve is sleeved outside the flexible connection line to protect the end portion of the flexible connection connected to the moving contact.

[0008] In an optional embodiment, the sleeve is sleeved on the end portion of the flexible connecting wire connected to the moving contact.

[0009] In an optional embodiment, one end of the flexible connecting wire includes a connecting portion and a mounting portion connected to each other, the connecting portion is connected to the moving contact, and the sleeve is sleeved on the mounting portion.

[0010] In an optional embodiment, the connecting portion is welded to the moving contact;

[0011] Or the connecting portion and the moving contact are connected by bolts.

[0012] In an optional embodiment, the number of the moving contact, the number of the flexible connecting wire and the number of the sleeve are all one;

[0013] Alternatively, the number of the moving contacts, the number of the flexible connecting wires and the number of the bushings are all two, the two flexible connecting wires are respectively connected to the two moving contacts, and the two bushings are respectively sleeved on the two flexible connecting wires.

[0014] In an optional embodiment, when the number of the moving contacts, the flexible connecting wires and the bushings are all two, the two flexible connecting wires are respectively connected to the two opposite sides of the two moving contacts.

[0015] In an optional embodiment, the moving contact assembly further includes a connecting piece, one end of the flexible connecting wire is connected to the moving contact, and the other end is connected to the connecting piece.

[0016] In an optional embodiment, the sleeve is made of silicone rubber.

[0017] In a second aspect, the utility model provides a conversion switch, comprising a moving contact assembly as described in any one of the aforementioned embodiments.

[0018] In a third aspect, the utility model provides a power distribution device, including a conversion switch as described in the above embodiment.

[0019] The beneficial effects of the contact assembly, conversion switch and power distribution equipment provided by the embodiments of the utility model include: by arranging a sleeve outside the flexible connecting wire to protect the flexible connecting wire, the end of the flexible connecting wire is protected, and the bending stress is released in the flexible bending section of the flexible connecting wire, thereby avoiding fatigue tearing or even breakage of the end of the flexible connecting wire caused by the moving contact assembly after long-term operation, thereby extending the service life of the flexible connecting wire and the moving contact assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the structure of a moving contact assembly from a first perspective provided in an embodiment of the utility model;

[0022] Figure 2 A schematic diagram of the structure of the moving contact assembly provided by an embodiment of the utility model from a second viewing angle;

[0023] Figure 3 A schematic structural diagram of a first-viewing angle of view of a partial structure of a moving contact assembly provided in an embodiment of the utility model;

[0024] Figure 4A schematic structural diagram of a partial structure of a moving contact assembly from a second perspective provided in an embodiment of the utility model.

[0025] Icon: 10-moving contact assembly; 100-housing; 200-moving contact; 300-flexible connecting wire; 310-connecting part; 320-installing part; 400-sleeve; 500-connecting piece. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. 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.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0030] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The transfer switch is mainly used in working environments where low-voltage power distribution systems are powered by two power supplies. Its function is to automatically convert the main power supply of the transmission and distribution line to the backup power supply when problems or failures occur in the normal power supply, thereby achieving uninterrupted power supply to the entire circuit, thereby ensuring the continuity and stability of power consumption for key loads.

[0033] During the operation of the transfer switch, the moving contact will rotate under the drive of the driving mechanism to achieve the action of switching the power supply. The moving contact is usually connected to the load end by a soft connecting wire. During the rotation of the moving contact, due to the large rotation angle of the moving contact, the bending stress will be concentrated on the connection between the soft connecting wire and the moving contact, which will cause fatigue tearing or even breakage of the soft connecting wire after long-term operation.

[0034] Based on the above problems, the utility model provides a transfer switch which can be applied to the technical field of low-voltage electrical appliances. The transfer switch includes a mounting shell, a static contact assembly and a moving contact assembly.

[0035] In this embodiment, both the static contact assembly and the moving contact assembly are installed in a mounting shell, wherein the static contact assembly generally includes a common static contact and a spare static contact, and the moving contact assembly contacts the common static contact or contacts the spare static contact to realize switching between the common power supply and the spare power supply, thereby ensuring uninterrupted power supply to the entire circuit, thereby ensuring the continuity and stability requirements of power consumption of key loads.

[0036] For details, see Figures 1 to 4 The moving contact assembly 10 includes a housing 100 , a moving contact 200 , a flexible connecting wire 300 and a sleeve 400 .

[0037] The moving contact 200 is disposed in the housing 100 , the flexible connecting wire 300 is connected to the moving contact 200 , and the sleeve 400 is sleeved outside the flexible connecting wire 300 to protect the end of the flexible connection connected to the moving contact 200 .

[0038] In this embodiment, since the moving contact 200 will concentrate the bending stress at the connection between the soft connecting wire 300 and the moving contact 200 during the switching process between the common static contact and the spare static contact, in order to avoid this situation, a sleeve 400 is arranged outside the soft connecting wire 300 to protect the soft connecting wire 300, thereby protecting the end of the soft connecting wire 300, so that the bending stress is released in the flexible bending section of the soft connecting wire 300, avoiding fatigue tearing or even breakage of the end of the soft connecting wire 300 caused by the moving contact assembly 10 after long-term operation, thereby extending the service life of the soft connecting wire 300 and the moving contact assembly 10.

[0039] It is worth mentioning that in actual use, the existing moving contact assembly 10 usually has the phenomenon of the soft connecting wire 300 breaking after running 2000 to 4000 times; however, after the soft connecting wire 300 is sleeved with the sleeve 400, the soft connecting wire 300 is still intact after running 6000 times. This shows that by arranging the sleeve 400 outside the soft connecting wire 300, the service life of the soft connecting wire 300 is significantly and effectively increased.

[0040] It can be understood that the length of the sleeve 400 can be consistent with the length of the flexible connecting line 300 to protect the entire flexible connecting line 300; of course, in actual applications, the tearing of the flexible connecting line 300 usually only occurs at the connection between the flexible connecting line 300 and the moving contact 200. Therefore, in order to protect the flexible connecting line 300 and reduce the length of the sleeve 400 to reduce production costs, the length of the sleeve 400 is set to 3~4mm, that is, to ensure that the sleeve 400 is sleeved on the end where the flexible connecting line 300 is connected to the moving contact 200.

[0041] Optionally, the sleeve 400 is made of silicone rubber.

[0042] In this embodiment, the sleeve 400 is made of silicone rubber, which has certain flexibility, resilience and surface hardness, and can provide good protection for the soft connecting wire 300; it also has excellent insulation performance, and has very good corona resistance and arc resistance, thereby improving the performance of the moving contact assembly 10.

[0043] Specifically, one end of the flexible connecting wire 300 includes a connecting portion 310 and a mounting portion 320 that are connected to each other. The connecting portion 310 is connected to the moving contact 200 , and the sleeve 400 is sleeved on the mounting portion 320 .

[0044] In this embodiment, a connecting portion 310 and an installation portion 320 are provided at one end of the flexible connecting wire 300 close to the moving contact 200. By connecting the connecting portion 310 to the moving contact 200 and sleeve 400 on the installation portion 320, the connection stability of the flexible connecting wire 300 can be ensured, and the sleeve 400 can also protect the flexible connecting wire 300, thereby preventing the flexible connecting wire 300 from being torn or even broken.

[0045] Furthermore, the connection portion 310 is connected to the moving contact 200 by welding, so that the connection portion 310 and the moving contact 200 are firmly connected, thereby improving the structural stability and structural strength of the moving contact assembly 10 .

[0046] Of course, in other embodiments, the connection portion 310 and the moving contact 200 may also be connected by bolt fixing, as long as the connection portion 310 and the moving contact 200 are firmly connected, which is not specifically limited here.

[0047] Furthermore, the number of the moving contact 200, the flexible connecting wire 300 and the sleeve 400 can be one or two, and the number can be determined according to the number of the moving contacts 200 of the product. When the number of the moving contact 200, the flexible connecting wire 300 and the sleeve 400 is two, the two flexible connecting wires 300 are respectively connected to the two moving contacts 200, and the two sleeves 400 are respectively sleeved on the two flexible connecting wires 300.

[0048] In this embodiment, the two moving contacts 200 are arranged at intervals, so that the two moving contacts 200 are driven to be clamped on both sides of the stationary contact and contact the stationary contact respectively, so as to achieve closing with the stationary contact, which can ensure stable closing.

[0049] Furthermore, the two flexible connecting wires 300 are respectively connected to the two opposite sides of the two moving contacts 200 .

[0050] In this embodiment, the connection parts 310 of the two flexible connecting wires 300 are respectively connected to the two sides of the two moving contacts 200 to increase the distance between the two flexible connecting wires 300, thereby increasing the distance between the two sleeves 400 respectively sleeved on the mounting parts 320 of the two flexible connecting wires 300 to avoid collision between the two sleeves 400.

[0051] Furthermore, the moving contact assembly 10 further includes a connecting piece 500 , one end of the flexible connecting wire 300 is connected to the moving contact 200 , and the other end is connected to the connecting piece 500 .

[0052] In this embodiment, the connector 500 is used to be fixedly mounted on the mounting shell, so one end of the flexible connecting wire 300 is connected to the moving contact 200, and the other end is connected to the load bus through the connector 500 to provide electrical energy to it through the load bus.

[0053] In summary, the utility model provides a contact assembly and a switching switch, which protect the flexible connecting wire 300 by disposing a sleeve 400 outside the flexible connecting wire 300, thereby protecting the end of the flexible connecting wire 300 and releasing the bending stress in the flexible bending section of the flexible connecting wire 300, thereby preventing the end of the flexible connecting wire 300 from fatigue tearing or even breaking after the moving contact assembly 10 runs for a long time, thereby extending the service life of the flexible connecting wire 300 and the moving contact assembly 10.

[0054] Furthermore, the utility model also provides a power distribution device, including the conversion switch in the above embodiment. The power distribution device can be configured as at least one of the following: a distribution box, a cable, a distribution cabinet, a motor, a switch socket, a lamp, an air conditioner, an electric water heater, an electric meter, a camera, a telephone, a computer, etc. The power distribution device can use the related structure of the conversion switch of the present application to realize intelligent management, but it is not limited to the above intelligently managed power distribution equipment, and can also be used in non-intelligent power distribution equipment in traditional industries.

[0055] Not only that, power distribution equipment can be used in smart scenarios, such as smart homes, the Internet of Things industry and more smart scenarios to achieve intelligent management.

[0056] Optionally, the embodiments of the present application can be used for: fire-fighting electricity: fire control room, fire pumps, smoke exhaust facilities, fire elevators and their drainage pumps, fire emergency lighting, etc.; corridor lighting, duty lighting, guard lighting, obstacle sign lights; rail transit; security system power supply; electronic information room power supply; passenger elevator power; sewage pump; variable frequency speed regulation constant pressure water supply and domestic pump; main offices, conference rooms, general duty rooms and archives rooms, etc.

[0057] It is understood that the above scenarios are only examples and do not constitute a limitation on the application scenarios of the technical solutions provided in the embodiments of the present application. The technical solutions of the present application can also be applied to other scenarios. For example, it is known to those skilled in the art that with the evolution of the system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0058] The devices in the embodiments of the present application can be combined, divided and deleted according to actual needs.

[0059] In the present application, the same or similar terminology concepts, technical solutions and / or application scenario descriptions are generally described in detail only the first time they appear. When they appear again later, they are generally not repeated for the sake of brevity. When understanding the technical solutions and other contents of the present application, for the same or similar terminology concepts, technical solutions and / or application scenario descriptions that are not described in detail later, reference can be made to the previous related detailed descriptions.

[0060] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A moving contact assembly, characterized in that: It comprises a housing (100), a moving contact (200), a flexible connecting wire (300) and a sleeve (400); The moving contact (200) is arranged on the housing (100), the flexible connection line (300) is connected to the moving contact (200), and the sleeve (400) is sleeved outside the flexible connection line (300) and is used to protect the end of the flexible connection connected to the moving contact (200).

2. The moving contact assembly according to claim 1, characterized in that: The sleeve (400) is sleeved on the end portion of the flexible connecting wire (300) connected to the moving contact (200).

3. The moving contact assembly according to claim 1, characterized in that: One end of the flexible connecting wire (300) comprises a connecting portion (310) and a mounting portion (320) connected to each other, the connecting portion (310) is connected to the moving contact (200), and the sleeve (400) is sleeved on the mounting portion (320).

4. The moving contact assembly according to claim 3, characterized in that: The connecting portion (310) is welded to the moving contact (200); Or the connecting portion (310) and the moving contact (200) are connected via bolts.

5. The moving contact assembly according to claim 1, characterized in that: The number of the moving contact (200), the flexible connecting wire (300) and the sleeve (400) is one; Alternatively, the number of the moving contact (200), the number of the flexible connecting wire (300), and the number of the sleeve (400) are all two, the two flexible connecting wires (300) are respectively connected to the two moving contacts (200), and the two sleeves (400) are respectively sleeved on the two flexible connecting wires (300).

6. The moving contact assembly according to claim 5, characterized in that: When the number of the moving contacts (200), the flexible connecting wires (300) and the sleeves (400) is two, the two flexible connecting wires (300) are respectively connected to the two opposite sides of the two moving contacts (200).

7. The moving contact assembly according to claim 1, characterized in that: The moving contact assembly further comprises a connecting piece (500); one end of the flexible connecting wire (300) is connected to the moving contact (200), and the other end is connected to the connecting piece (500).

8. The moving contact assembly according to claim 1, characterized in that: The sleeve (400) is made of silicone rubber.

9. A transfer switch, characterized in that: It comprises a moving contact assembly as described in any one of claims 1 to 8.

10. A power distribution device, characterized in that: Comprising the conversion switch as claimed in claim 9.

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