CN210640151U

CN210640151U - Flexible tripping device and combined electrical appliance comprising same

Info

Publication number: CN210640151U
Application number: CN201922081828.5U
Authority: CN
Inventors: 王东升; 杜世全; 王富刚
Original assignee: Schneider Electric Industries SAS
Current assignee: Schneider Electric Industries SAS
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-05-29
Anticipated expiration: 2029-11-26

Abstract

A flexible tripping device of a combined electrical appliance comprises a transmission piece, a flexible connecting piece and a driving piece, wherein the transmission piece is movably arranged on a shell of the combined electrical appliance and close to a striker of a fuse, and can move from a first position to a second position under the driving of the striker and move from the second position to the first position under the action of a first elastic biasing force; the first end of the flexible connecting piece is connected to the transmission piece, and the second end of the flexible connecting piece is connected to the driving piece and can move along with the movement of the transmission piece so as to drive the driving piece to move; and the driving piece is movably arranged on the shell of the combined electrical appliance, is connected to the tripping mechanism of the load switch, can move from the third position to the fourth position when the transmission piece moves from the first position to the second position so as to drive the tripping mechanism to open and can move from the fourth position to the third position under the action of second elastic biasing force.

Description

Flexible tripping device and combined electrical appliance comprising same

Technical Field

The utility model relates to a flexible trip gear and combined electrical apparatus including this flexible trip gear.

Background

The load switch fuse combined electrical apparatus is an important switch device in the electrical field, and is used for controlling and protecting power supply equipment. Generally, a load switch fuse combination includes a load switch, a fuse, and a trip device connected between the load switch and the fuse. When the fuse wire of the fuse is fused, the striker of the fuse acts to trigger the tripping device to act, so that the load switch is switched off.

Typically, prior trip devices employ hard-wired transmission members such as sheet metal. However, since the space distance between the striker of the fuse and the tripping mechanism capable of opening the load switch is relatively long, more hard-connection transmission parts, such as more metal sheet metal parts and machined parts, are required for realizing the movement of the striker triggering the tripping mechanism. Because of more hard connection driving parts, the motion transmission links in the existing tripping device are more, so that the energy loss is also larger, the energy transmission efficiency is lower, the misoperation or the non-operation often occurs, and the reliability is poorer. Furthermore, the overall cost of the existing trip device is high.

There is no technology to manufacture a release device with a small number of parts, high energy transfer efficiency, low cost and high reliability.

SUMMERY OF THE UTILITY MODEL

Therefore, the present invention is directed to a flexible trip device and a combined electrical apparatus including the same, which has a simple transmission design, high energy transfer efficiency, low cost, and high flexibility and reliability.

The utility model relates to a flexible trip gear of combined electrical apparatus sets up between this combined electrical apparatus's load switch and fuse. The flexible tripping device comprises a transmission piece, a flexible connecting piece and a driving piece, wherein the transmission piece is movably arranged on the shell of the combined electrical appliance and close to a striker of the fuse, and can move from a first position to a second position under the driving of the striker and move from the second position to the first position under the action of a first elastic biasing force; the first end of the flexible connecting piece is connected to the transmission piece, and the second end of the flexible connecting piece is connected to the driving piece and can move along with the movement of the transmission piece so as to drive the driving piece to move; and the driving piece is movably arranged on the shell of the combined electrical appliance, is connected to the tripping mechanism of the load switch, can move from the third position to the fourth position when the transmission piece moves from the first position to the second position so as to drive the tripping mechanism to open and can move from the fourth position to the third position under the action of second elastic biasing force.

In an embodiment, the flexible trip device further includes a first shaft and a second shaft disposed on the housing of the combined electrical apparatus, the transmission member is disposed on the housing through the first shaft and can rotate around the first shaft, and the driving member is disposed on the housing through the second shaft and can rotate around the second shaft.

In one embodiment, the flexible trip device further comprises a first bracket and a second bracket which are fixed on the shell of the combined electrical appliance, and the flexible connecting piece is arranged on the first bracket and the second bracket.

In one embodiment, the flexible trip unit further comprises a first resilient member disposed between the transmission member and the first bracket and applying a first resilient biasing force to the transmission member.

In one embodiment, the flexible connector includes a sheath disposed over the first and second stents and a flexible wire inside the sheath that extends out of the sheath at the first and second ends of the flexible connector and is movable within the sheath.

In one embodiment, the flexible wire of the flexible connector includes a protrusion at the second end, the driving member has a slot disposed thereon, the flexible wire extends from one side of the driving member through the slot such that the protrusion is on the other side of the driving member, and the protrusion has a larger dimension than the slot to move the driving member from the third position to the fourth position when the driving member moves from the first position to the second position.

In one embodiment, the protrusion contacts a surface on the other side of the driver when the driver is in the third position.

In one embodiment, when the driving member is located at the third position, the protrusion is spaced apart from the surface of the other side of the driving member.

In one embodiment, the flexible trip unit further comprises a link through which the driving member is connected to the trip mechanism of the load switch.

In one embodiment, the second resilient biasing force is provided by a resilient member in the trip mechanism of the load switch.

In one embodiment, the flexible trip unit further comprises a second resilient member disposed between the driving member and the second bracket and applying a second resilient biasing force to the driving member.

The utility model discloses still relate to a combined electrical apparatus, including load switch and fuse, still include as above flexible trip gear.

Drawings

The advantages and objects of the present invention will be better understood from the following detailed description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the relationship of the various components. In the drawings:

fig. 1 shows an overall schematic view of an embodiment of the flexible trip device of the present invention;

fig. 2 shows a partial schematic view of another embodiment of the flexible trip unit of the present invention, in which the transmission is shown;

fig. 3 shows a partial schematic view of another embodiment of the flexible trip unit of the present invention, showing the drive member and the trip mechanism of the load switch; and

fig. 4 shows a partial schematic view of a flexible connection of an embodiment of the flexible trip unit of the present invention.

Detailed Description

Various embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Here, it is to be noted that, in the drawings, the same reference numerals are given to constituent parts having substantially the same or similar structures and functions, and repeated description thereof will be omitted. The terms "first direction", "second direction", "rotational direction", and the like herein are described with respect to the drawings of the present invention, unless otherwise specified. The description of "first" and its variants is merely for the purpose of distinguishing between the parts and does not limit the scope of the invention, which can be written as "second" and so on without departing from the scope of the invention.

The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of the respective portions and the mutual relationships thereof.

Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to fig. 1 to 4.

As shown in fig. 1, in addition to the load switch and the fuse, the combined electrical apparatus of the present invention further includes a flexible trip device 100 disposed between the load switch and the fuse to connect the load switch and the fuse. The flexible tripping device comprises a transmission member 1, a flexible connecting member 2 and a driving member 3. The flexible tripping device further comprises a first shaft 6 and a second shaft 7 which are arranged on the shell of the combined electrical apparatus, and a first bracket 8 and a second bracket 9 which are fixed on the shell of the combined electrical apparatus. Furthermore, the flexible trip device comprises a first resilient member 5, for example a spring, which is arranged between the transmission member 1 and the first bracket 8 and exerts a first resilient biasing force on the transmission member to bias it in the first position, as shown in fig. 1.

In fig. 1, the transmission element 1 is arranged on the housing via a first shaft 6 and can be rotated about the first shaft. In addition, the transmission piece 1 is located close to the striker of the fuse, for example in the three-phase fuse magazine of the fuse and close to the fuse striker. When the fuse of the fuse blows, the striker drives the transmission member 1 to rotate about the first axis 6 to rotate from the first position to the second position, for example in a counterclockwise direction about the first axis 6 as shown in fig. 1 (as indicated by the arrow near the transmission member 1 in fig. 1). In this process, the first elastic member 5 is stretched. After the switch-off of the load switch, the first elastic element 5 can be retracted, and the transmission element 1 can be returned from the second position to the first position by the first elastic element 5, during which the transmission element is rotated, for example, in a clockwise direction about the first axis 6 (opposite to the direction indicated by the arrow near the transmission element 1 in fig. 1). In other examples, the transmission part can also be movably arranged on the housing of the combined electrical appliance by means of a guide rail. For example, the transmission member is translated from a first position to a second position upon actuation of the striker.

The flexible connector 2 is arranged on the first bracket 8 and the second bracket 9, for example through slots in the first bracket and the second bracket. The first end 21 of the flexible connecting element 2 is connected to the transmission element 1 and the second end 22 is connected to the driving element 3, and can move along with the movement of the transmission element to drive the driving element to move. As shown in fig. 1, when the transmission piece 1 is rotated, for example, in a counterclockwise direction about the first axis 6 from the first position to the second position, the flexible connection piece 2 moves with the transmission piece to the lower left in the drawing. Depending on the actual situation and design requirements, the flexible trip unit may include other numbers of brackets to enable the flexible link to efficiently transmit the movement of the striker of the fuse to the trip mechanism of the load switch. In one example, the flexible trip unit may also not include a bracket, and the flexible connection is disposed directly on the housing to further reduce the components required for the flexible trip unit.

The drive member 3 is arranged on the housing via a second shaft 7 and can be rotated about the second shaft. The flexible trip device further comprises a link 10 by which the drive 3 is connected to the trip mechanism 4 of the load switch. The driver 3 is shown in a third position in fig. 1. When the transmission member 1 rotates from the first position to the second position, for example, in the counterclockwise direction around the first shaft 6, the driving member 3 rotates from the third position to the fourth position around the second shaft 7 under the driving of the flexible connecting member, for example, in the clockwise direction around the second shaft 7 (as shown by the arrow near the driving member 3 in fig. 1), so that the tripping mechanism 4 is driven to rotate by the connecting rod 10, and the load switch is opened. Furthermore, after the switch-off of the load switch, the drive member 3 can also be returned from the fourth position to the third position under the action of the second spring bias, in the course of which the drive member is rotated, for example, in the counterclockwise direction about the second axis 7 (opposite to the direction indicated by the arrow in the vicinity of the drive member 3 in fig. 1). In other examples, the drive element can also be movably arranged on the housing of the combined electrical appliance via a guide rail. For example, the driving member is driven by the flexible connector to translate from the third position to the fourth position.

In the example shown in fig. 1, the second resilient biasing force is provided by a spring in the trip mechanism 4 of the load switch. After the load switch is opened, the tripping mechanism 4 moves away from the opening position under the action of the elastic piece thereof, and drives the driving piece 3 to rotate from the fourth position to the third position.

In other examples of the present invention, the flexible trip device further comprises a second resilient member disposed between the driving member and the second support and applying a second resilient biasing force to the driving member, such as a spring or a leaf spring. After the load switch is opened, the driving member rotates from the fourth position to the third position under the action of the second elastic member, and drives the tripping mechanism to move away from the opening position.

In addition, the rotation directions in fig. 1 are only schematic, and the rotation directions of the transmission member and the driving member are not limited to the directions shown in the drawings.

Fig. 2 and 3 show partial components of another embodiment of a flexible trip unit, which differs from the unit shown in fig. 1 mainly in the form of a transmission, a first bracket and a second bracket.

As shown in fig. 1 and 2, the transmission members 1 and 1' have a T-shape and comprise a transverse bar and a vertical bar perpendicular to each other, wherein the vertical bar is arranged on a first axis by means of a pin and is rotatable around this axis. In other examples, the transmission pieces 1 and 1' may have an H-shape, depending on the clearance space of the fuse magazine in the combined appliance.

In addition, the first spring 5 in fig. 1 is connected between the upper end of the vertical rod of the transmission 1 and the first support 8, while the first spring 5 'in fig. 2 is connected between an additional component fixed on the upper end of the vertical rod of the transmission and the first support 8'.

The first bracket 8 in fig. 1 is fixed to the first shaft 6, while the first bracket 8' in fig. 2 is fixed to the casing of the combined electrical appliance. The second bracket 9 in fig. 1 is fixed to the casing of the combined electrical appliance and the second bracket 9' in fig. 3 is fixed to the second shaft, and both have different shapes depending on the actual situation and the design requirements.

Referring to fig. 1 and 4, the flexible connector 2 includes a sheath 23 disposed on the first and

second brackets

8, 9 and a flexible wire 24 inside the sheath, the flexible wire 24 extending outside the sheath at first and second ends of the flexible connector and being movable within the sheath. The sheath may provide guidance and protection for the flexible wire.

Figure 4 shows a schematic view near the second end 22 of the flexible connector 3. The flexible wire 24 is located inside the outer sheath 23 and can move back and forth within the sheath. The sheath is made of metal or nonmetal material, such as metal spiral tube, polytetrafluoroethylene tube, nylon tube, etc. The flexible wire is a solid metal or non-metal wire, for example, which may be of similar material to the sheath.

In one example of the invention, the flexible wire may be directly fixed to the driving member. In other examples, the flexible wire is connected to the driver by other structures.

As shown in fig. 4, the flexible wire of the flexible connection comprises a protrusion 25 at the second end. As shown in fig. 1, the driver is also provided with a slot 31, for example having a rectangular shape and having an entrance extending from the lower end of the rectangle to the edge of the driver. The flexible wire enters the rectangular slot from the entrance and extends through the slot from one side of the driver (the side shown in the figures) so that the projection is on the other side of the driver (i.e. the back side of the driver). The protrusion has a larger dimension than the slot and does not pass through the slot, thereby moving the driving member from the third position to the fourth position when the driving member moves from the first position to the second position.

For example, when the driver is in the third position, the protrusion contacts a surface on the other side of the driver. When the transmission piece moves, the driving piece immediately moves along with the transmission piece under the driving of the flexible wire.

In other examples, the protrusion is spaced a distance from a surface on the other side of the driver when the driver is in the third position. In this way, by adjusting the distance between the protrusion of the flexible wire and the other side surface of the driving member, the energy transfer time (i.e., the trip time) can be adjusted, thereby changing the magnitude of the transfer current.

When the driving member does not move, that is, the flexible wire does not move, due to the arrangement of the groove, the driving member is not obstructed by the flexible wire, and therefore, the driving member can also move from the third position to the fourth position under the action of other tripping power source mechanisms (such as electromagnets, manual buttons and the like at other positions), so that the tripping mechanism of the load switch is switched off.

Through the structure, the utility model discloses a flexible trip gear and load switch fuse combined electrical apparatus's transmission design is simple, energy transfer efficiency is high, the cost is lower and flexibility and reliability are higher.

Moreover, the technical features disclosed above are not limited to the combinations with other features disclosed, and other combinations between the technical features can be performed by those skilled in the art according to the purpose of the invention to achieve the aim of the invention.

Claims

1. A flexible tripping device of a combined electrical appliance is arranged between a load switch and a fuse of the combined electrical appliance and is characterized in that the flexible tripping device comprises a transmission piece, a flexible connecting piece and a driving piece,

the transmission piece is movably arranged on the shell of the combined electrical appliance and close to the striker of the fuse, and can move from the first position to the second position under the driving of the striker and move from the second position to the first position under the action of the first elastic biasing force;

the first end of the flexible connecting piece is connected to the transmission piece, and the second end of the flexible connecting piece is connected to the driving piece and can move along with the movement of the transmission piece so as to drive the driving piece to move; and

the driving member is movably disposed on the housing of the combined electrical appliance, is connected to the trip mechanism of the load switch, and can move from the third position to the fourth position when the driving member moves from the first position to the second position to drive the trip mechanism to open and move from the fourth position to the third position under the action of a second elastic biasing force.

2. The flexible trip unit of claim 1, further comprising a first shaft and a second shaft disposed on a housing of the switchgear, the transmission member being disposed on the housing via the first shaft and rotatable about the first shaft, and the driving member being disposed on the housing via the second shaft and rotatable about the second shaft.

3. The flexible trip unit of claim 1, further comprising a first bracket and a second bracket secured to the housing of the combined electrical apparatus, the flexible connection being disposed on the first bracket and the second bracket.

4. The flexible trip unit of claim 3, further comprising a first resilient member disposed between the transmission member and the first support and applying a first resilient biasing force to the transmission member.

5. The flexible trip unit of claim 3, wherein the flexible connection member comprises a sheath disposed on the first and second supports and a flexible wire inside the sheath, the flexible wire extending outside the sheath at the first and second ends of the flexible connection member and being movable within the sheath.

6. The flexible trip unit of claim 5, wherein the flexible wire of the flexible connection includes a protrusion at the second end, the drive member has a slot disposed therein, the flexible wire extends from one side of the drive member through the slot such that the protrusion is on the other side of the drive member, and the protrusion has a larger dimension than the slot to move the drive member from the third position to the fourth position when the drive member moves from the first position to the second position.

7. The flexible trip unit of claim 6, wherein the protrusion contacts a surface on the other side of the actuator when the actuator is in the third position.

8. The flexible trip unit of claim 6, wherein the protrusion is spaced a distance from a surface on the other side of the actuator when the actuator is in the third position.

9. The flexible trip unit of claim 1, further comprising a linkage through which the drive member is connected to the trip mechanism of the load switch.

10. The flexible trip unit of claim 1, wherein the second resilient biasing force is provided by a resilient member in the trip mechanism of the load switch.

11. The flexible trip unit of claim 3, further comprising a second resilient member disposed between the drive member and the second bracket and exerting a second resilient biasing force on the drive member.

12. A combined electrical appliance comprising a load switch and a fuse, characterized in that it further comprises a flexible trip device according to any one of claims 1 to 11.